Bien Phap Thi Cong M&E

7/13/2019 Bien Phap Thi Cong M&E.

1/72

THUYT MINH BIN PHP

T CHC THI CNG

I - GII THIU CHUNG.. 3

II - TNG QUAN V H THNG.....6

III - BIN PHP T CHC VN CHUYN VT T N V TR LP T..7

IV NGUN IN TM THI CNG....11

V - BIN PHP T CHC THI CNG H NG NC.....11

VI - BIN PHP T CHC THI CNG H NG GI........34

VII - BIN PHP T CHC THI CNG LP T THIT B HKK.........57

VIII - BIN PHP AN TON, PHNG CHNG CHY N V BO V MI TRNG.64

IX TIN THI CNG V BIU NHN LC....65

1. Mc ch

Mc ch ca phng php thi cng ny l m t qu trnh thi cng lp t h thng iu ho khng kh

v thng gi bn trong ta nh trn c s phi ph hp vi tiu chun k thut quy nh trong hp ng, bn

v thit k thi cng, bn v phi hp v bn v cc ng xuyn kt cu

2. Phm vi cng vic

Phm vi cng vic c m t trong phng php thi cng ny bao gm ton b vic lp t h thng

ng gi, h thng ng nc v thng gi bn trong Ta Nh, h thng ht khi v thng gi nh bp cc khu

vc hnh lang cc khu v sinh to p cu thang

Generated by Foxit PDF Creator Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.


2/72

Trang2/72

3. S cng vic lp t h thng iu ho khng kh & thng gi.

Tin hnh thi cng lp t

t yu cu

Khng tPhiu x l k thut

Nghim thu tng phn

Nghim thu bi TVGS &BQLDA

Bn giao cho BQLDA& ch u t

t yu cu

Khng tChnh sa nghim thu li

Khng t

Chnh sa nghim thu li

Khng tCn chnh nghim thu li

t yu cu

t yu cu

1. Vt t2. Bn v thit k thi cng3. Phng php thi cng

t

Vt t giao n cng trng

T vn nghim thu

T vn Ki m tra

Chuyn vt t n ni lp t

Kt ni h thng

Nghim thu h thng

Cn chnh, vn hnh h thng



3/72

Trang3/72

I -hp TNG QUAN V H THNG

1. Tng quan h thng lnh:

1.1- Khu nh A: khu nh A gm 8 chiller gii nhit gi(Air cooled chiller) lp c nh tng mi 20, ngoi

ra tng mi ny cn lp thm 8 bm tun hon nc lnh cho chiller v 8 bm tun hon phn phi nc lnhcho cc AHU v FCU . hn ch s ln khi ng my nn ca cc chiller, hai b m(buffer tank) c ni

vi h thng ng ng nc lnh chnh chiller. Mc khc duy tr p sut trong h thng ng ng nc

chiller, cc bnh gin n kiu kn (expansion vessel) c ni vi h thng ng ng nc chiller.

T ng ghp ca ng ng nc chiller, phn thnh bn cp ng c bm tun hon phn phn phi nc

lnh( mi cp ng gm mt ng cp nc lnh v mt ng hi nc lnh) bm nc lnh chy dc theo

cc trc thng ng cung cp cho cc AHU v FCU. Hai cp ng cung cp cho AHU, cc AHU c t

tng F20, F10 v P01. Hai cp ng cung cp cho cc FCU, t hai cp ng thng ng ny c cc nhnh r vo

mi tng cung cp cho cc FCU c lp ti cc tng.

1.2- Cc khu nh B: Gm 10 khu nh B, mi khu nh B bao gm 1 chiller gii nhit gi(Air cooled chiller)

lp c nh tng mi 10, 1 bm tun hon nc lnh cho chiller v phn phi nc lnh cho cc AHU v

FCU, 1 b m(buffer tank) c ni vi h thng ng ng nc lnh chiller hn ch s ln khi ng ca

my nn chiller. Mc khc duy tr p sut trong h thng ng ng nc chiller, 1 bnh gin n kiu kn

(expansion vessel) c ni vi h thng ng ng nc chiller.

Nc lnh sau khi c hi v t cc FCU v AHU c bm nc lnh bm n chiller, sau khi ra khi

chiller i qua b m v sau chy dc theo trc thng ng (trc thng ng gm 1 ng cp v 1 ng hinc lnh). T trc thng ng ny, c cc nhnh r vo mi tng cung cp nc lnh cho cc FCU c lp ti

cc tng.v AHU t tng P01.

2. H thng cp lnh

- Chiller gii nhit gi

- H thng bm tun hon nc lnh

- Thit b x l khng kh (AHU) v thit b trao i nhit (FCU).

- H thng ng ng cp nc lnh v cc ph kin lp t

- H thng van cn bng, van chn, li lc, van x kh, van iu chnh, van mt chiu, h thng ng

gp, cc h thng ng ni mm.

- H thng bo n, cch nhit v chng chy cc ng ng.

- Cc thit b ph, gi treo, bu lng treo.



4/72

Trang4/72

- Cc ph kin v vt liu khc.

3. H thng thng gi v ht khi

- H thng qut cp gi ti, gi thi v thi khi trong trng c chy.

- H thng ng ng gi cp, gi hi, gi thi, h thng ng gi thi khi chu nhit cao.- H thng ng ni mm (flexible duct)

- H thng van cn bng, van iu p v van 1 chiu.

- H thng thit b phn phi gi, tiu m, ming gi cp, ming gi hi.

- H thng bo n cho ng ng gi, chng chy.

- H thng cch nhit,chng chy cho cc ng ng thng gi.

- Cc ph kin v vt liu ph khc.

4. H thng nc lnh gm:

- Chiller, AHU, FCU.

- Bm tun hon cp nc lnh.

- Cc van in trong h thng ng ng cung cp lnh.



5/72

Trang5/72

II - BIN PHP T CHC VN CHUYN VT T, THIT B

N V TR LP T

1. Phm vi cng vic:

Xc nh c ni dung cng vic vn chuyn vt t, thit b bo m an ton, cht lng thc hin

cng trnh ng tin .

Vt t v thit b HKK u c kim tra cn thn k cng theo bn v thi cng trc khi vn chuyn

n v tr lp t.

2. Phng php vn chuyn

Tt c cc thit b, vt t v ph kin c vn chuyn t kho ca cng trng n vn thng hoc khu

vc ca cu a ln cc tng cn lp t.

Vn chuyn ng nc v ph kin n v tr lp t

+ Ph kin ca ng nc c vn chuyn bng vn thng ln tng cn lp t.

+ ng nc vn chuyn bng cu thp t trn tng mi ln tng cn lp t.

+ ng nc v ph kin c vn chuyn trong tng bng tay hay xe ko n v tr lp t.

Vn chuyn ng gi v ph kin n v tr lp t (tng t nh vn chuyn ng nc)

+ Ph kin ca ng gi c vn chuyn bng vn thng ln tng cn lp t.

+ ng gi vn chuyn bng cu thp t trn tng mi hoc vn thng ln tng cn lp t.

+ ng gi v ph kin c vn chuyn trong tng bng tay hay xe ko n v tr lp t.

Vn chuyn FCU n v tr lp t

+ FCU c vn chuyn bng vn thng ln tng cn lp t

+ FCU c vn chuyn trong tng bng tay hay xe ko n v tr lp t

Vn chuyn qut n v tr lp t

+ Qut c vn chuyn bng vn thng ln tng cn lp t.

+ Qut c vn chuyn trong tng bng tay hay xe ko n v tr lp t

Vn chuyn AHU n v tr lp t

+ AHU vn chuyn bng cu thp t trn tng mi ln tng cn lp t.



6/72

Trang6/72

+ AHU c vn chuyn trong tng bng xe ko n v tr lp t

Vn chuyn bm n v tr lp t (tng t nh vn chuyn AHU)

+ Bm vn chuyn bng cu thp t trn tng mi ln tng cn lp t.

+ Bm c vn chuyn trong tng xe ko n v tr lp t Vn chuyn Chiller n v tr lp t

+ Chiller vn chuyn bng cu thp t trn tng mi ln tng cn lp t.

+ Chiller c vn chuyn trong tng bng tay hay xe ko n v tr lp t

Vn chuyn cc thit b vt t khc n v tr lp t (tng t nh vn chuyn AHU, ng nc)

+ Bm vn chuyn bng cu thp t trn tng mi ln tng cn lp t.

+ Bm c vn chuyn trong tng xe ko n v tr lp t

Vn thng vn chuyn



7/72

Trang7/72

Chi tit cu ng t di tng trt ln cc tng cn lp t ng

Chi tit cu AHU t di tng trt ln cc tng cn lp t AHU



8/72

Trang8/72

Chi tit cu chiller t di tng trt ln tng mi

Chi tit a chiller vo tng mi



9/72

Trang9/72

III - NGUN IN TM THI CNG

Ngun in thi cng c bn A cung cp cho bn nh thu thi cng ti mt ni qui nh trong mt

bng d n, v t v tr qui nh ny nh thu c in s ko ngun in n cc t in tm ca cc khu

vc, cc tng cn thi cng lp t.

IV - BIN PHP T CHC THI CNG H NG NC

A. PHNG PHP THI CNG NG:

Vi nhiu nm kinh nghim trong lnh vc thi cng lp t h thng iu ho khng kh, thng gi v cp

nhit, cho mt d n hon thnh ng tin v m bo cht lng, Nh thu chng ti lun hoch

nh cho mnh mt k hoch thi cng chi tit, quy trnh c thc hin mt cch trnh t, hp l v bt

buc mi cng trnh phi thc hin ng theo quy trnh lp.

1. Mc ch cng vic:

Xc nh c ni dung cng vic thi cng lp t bo m v k thut, cht lng thc hin cng trnh

ng tin .

- Tng on ng, ph kin c kim tra cn thn.

- ng phi c ct bng my chuyn dng: dng da lm sch bavia sau khi ct kim loi hoc my ct

quay c kh bnh mi.

- Trong qu trnh thao tc khng c lm dch chuyn ng trnh sai xt.

2. Phng php ni ren

- Phm vi: ng thp en cho h thng iu ha khng kh.

- Phng php c p dng khi kt ni thit b v ph kin ti cc v tr van in t khp ni mm van

a nng vo cc FCU, AHU nhit k p ki vi ng ng c DN 50.

- Ct ng

+ Cng tc ct ng c thc hin ti kho hoc ti v tr c d tr cho tng tng nhm thun li nht

cho cng tc thi cng.

+ Ct ng phi m bo ct vung gc.

- To ren ng

+ Dng my ren chuyn dng ren ng theo ng tiu chun kt ni ph kin.



10/72

Trang10/72

- Kt ni

+ V sinh sch du nht, phi st, bi khi b mt ngoi ng (ren c) v b mt trong ca ph kin.

+ Sn chng g ln u ren c; sau dng dy ay qun mt lp mng ln u ren c.

+ Dng tay vn u ng vo ph kin, sau dng c l sit cht.+ Sau khi sit cht v sinh ch ni ng.

My ren ng u ct ng

Hnh 2- chi tit ren ng

3. Phng php ni hn



11/72

Trang11/72

- Quy trnh hn:

Hnh 3 - chi tit hn

Bng 1- C ca R,G,v t

Chiu dy (t) t < 4mm 4mm < t < 6mm 6mm < t < 16mm

Gc khe hn () 6010 6010 6010

Chiu cao mt y (R) 1/2t 1.6mm 0.8mm 1.6mm 0.8mm

Khe h chn (G) 1mm ~ 2mm 1mm ~ 2mm 1mm ~ 2mm

+ m bo ng knh ng, v sinh b mt hn kh ro, sch bi, du nht v tr hn.

+ Kim tra gc khe hn ph hp vi ng knh ng, nu gc ny khng ng phi sa li ngay.

+ t v c nh hai on ng thng hng trc khi hn.

+ ng c hn bng my hn in h quang loi AC.

+ Dng in hn c iu chnh tng ng vi cc loi que hn nh bng di y

ng knh que hn (mm) 2.5 3.2 4.0

Dng in hn (A) 70 90 90 120 100 150

+ Hn nh 3 im i vi ng 300A; hn 6 im vi ng t 350A ~ 500A; v hn 8 im vi ng

550A.

+ Vi cng tc hn bch: hn 1 im gi mt bch vung gc vi ng sau hn 3 im, 4 im cho ti khi

hon tt ng hn. ng g hn mt ngoi khng c cao qu b mt bch.



12/72

Trang12/72

+ Tin hnh hn t trn xung di. Trong trng hp ng c cht c nh hn th c th hn t

di ln trn.

+ i vi cc ng ln c dy thnh ng ln 3mm, mi hn s c hn thnh nhiu lp, mi lp hn c

dy khong 3mm.

+ Sau khi hn xong phi v sinh sch mi hn v kim tra li mi hn nu li phi sa li ngay.

+ Ti im hn phi sch khng c g st.

+ Tt c cc ng ng hn phi c kim tra k trc khi gia cng.

+ Sau khi hon tt, v sinh v sn bo v mi hn.

- Vt liu v my hn.

+ Que hn s dng hn nh h s trnh vt t c ph duyt.

+ Que hn phi m bo cht lng v khng c m t.

- Bin php an ton.

+ Khu vc hn phi c che chn trnh ma, bi v nh hng n cc khu vc khc.

+ Khu vc hn phi c trang b bnh cha chy xch tay m bo phng chng chy n an ton.

+ Th hn phi c knh bo v, o bo h di tay, gng tay hn.

+ Khng c tin hnh hn ngoi tri khi iu kin thi tit khng cho php v nhng khu vc nguy him

c th gy chy n khi cha c bo v an ton, c th nh hng n cht lng ca mi hn.

- ng hn tiu biu:

Hnh 4 - ng hn4. Phng php ni bch

- Khp cc mt bch ch iu chnh giong ng v tr.

- Sit cht bulng, ai c trn mt bch.

- nh du v tr giao hai mt bch sau khi sit cng, sau kim tra k mi ni.



13/72

Trang13/72

4 L 8 L 12 L 16 L

Bng 2- chi tit kch thc mt bch

2

3 4

1

5 8

7 6

12

16

10

1411

15

9

13

2

3 4

1

5 8

7 6

2

3 4

1

2

3 4

112

8

10

6

5

9

11

7



14/72

Trang14/72



15/72

Trang15/72

5. Gi treo ng.

- ng ng c treo bng h thng gi treo.

- ng ng c gn gi nh sau: S dng gi treo thp gc c nh vng chc vo tng t nht 1 v

tr / 1 tng.

- ng ng lp theo phng ngang: c c nh trn gi treo gn vo gi treo ng.

- Khong cch cc gi ng theo bng sau:

Bng 3 - Khong cch gi treo ng

T DN15 n DN100 T DN125 n D300

Khong cch gi treo

ng thngng thp 2.5 m 3.0 m

Khong cch cc gitreo c nh ng

ng thp 12.5 m

- Kch thc thanh ren:

Bng 4 - Kch thc thanh ren

ng knh ng danh ngha DN ng knh thanh ren (mm)

DN 40 8

50 DN 125 10

125 < DN 200 12200 < DN 250 16

Bng 5- Bng kch thc thp hnh cho gi ng nc lnh, Gi treo cho 2 ng song song

ng knh ng danh ngha DN Kch thc gi ng

DN 32 L-30 x 30 x 3

40 DN 50 L-40 x 40 x 4

65 DN 100 L-50 x 50 x 5

125 DN 150 L-63 x 63 x 5

ng knh ngKiu



16/72

Trang16/72

- i vi cc gi treo nhiu ng th dng thanh ren DN16; rng khng qu 1m; khong cch gia cc

gi ng nh bng 3

Hnh 6 - Chi tit gi treo ng

2. ng ng i trn tng

Hnh 7 - Chi tit ng ng i trn tng

Cc ng ng hu ht treo trn trn, c mt s trng hp cc ng ng chy dc theo tng khng dng

c gi treo ta dng gi ng trn tng, cc kch thc ca thp hnh nh bng di y.

Bng 6- Bng kch thc thp hnh cho gi ng nc lnh i trn tng

ng knh ng danh ngha DN Kch thc gi ng

DN 32 L-30 x 30 x 3

40 DN 50 L-40 x 40 x 4

65 DN 100 L-50 x 50 x 5

125 DN 150 L-63 x 63 x 5



17/72

Trang17/72

Cc gi c 3 ng tr ln s dng thp L hoc thp U sao cho ti trng ph hp.

7. Gi treo b sung.

- Ti cc im c van hoc cc ph kin ti trng nng cn treo b sung gi .

Hnh 8 Gi b sung

8. Chi tit kt ni ng nhnh vo ng chnh

Hnh 9 Chi tit hn ng nhnh vo ng chnh

* Khot l ng v hn kt ni:

- i vi cc ng ng nhnh vo cc FCU kt ni vi ng ng chnh c ng knh nh hn 2 cp

tr ln

Gi Gi

Van > DN100

Gi

300 hay nh hn

Gi gn

Gi

Van DN100

Gi

600mm hay ln

hn

Gi gn

Gi

600mm hay ln hn

Gi gn

Gi

Gi gn

Gi

300 hay nh hn

45

Gi gn

300 hay nh hn

Gi



18/72

Trang18/72

- Dng Oxyacetylene m l vo thn ng.

- Dng Ct 90oc c sn to co 90o

- V sinh sch l ct v Co bng my mi cm tay.

- Lp Co ct ln l khot ca thn ng, dng thc ke cn chnh vung gc vi thn ng ri hnnh v, kim tra li trc khi hn hon thin.

- Mi kt ni c b tr 3 lp hn. ng nhnh c ng knh nh hn ng knh ng chnh.

Bng 7 Bng kch thc kt ni ng nhnh vo ng chnh

ng knh

ng

ng knh ng chnh DN

nhnh DN

40 50 65 80

20

25

32

40

50

i vi cc ph kin khng tha mn iu kin ng nhnh nh hn ng chnh 2 cp tr ln thi s s dng tco bnh thng v dng phng php hn kt ni.

9. Lc cn Y

- Kim tra khong khng gian bo dng thng xuyn.

- Khi khong khng gian bo dng y, th thay i gc ca lc rc, ti a 45o

Hnh 10- iu chnh lc cn



19/72

Trang19/72

10. ng h p sut :

- ng h p sut c gng vo thn ng nh hnh di: gm ng h v van kho.

- T l hin th p sut lm vic cao nht khong 150% n 200%.

- p sut chn khng ca ng h l 760 mmHg (0.1 Mpa) (Ch p dng cho u ht ca bm).

Hnh 11 - Chi tit lp t ng h p lc

11. Th p cho ng ng.

- Ton b tuyn ng v mi hn trc khi th p lc phi c v sinh sch s.

- Trc khi th p cn lm th tc v mi i din ca Ban qun l d n (PMB), T vn gim st

(Coninco) n kim tra, nghim thu tng phn lp t.

Th p lc ng ng (bng nc):

- Sau khi ng c lp t xong th tin hnh th p sut.

- Mi TVGS v Ch u T chng kin th p lc.

- Bm nc vo y ng ng ng thi x gi im cao nht sau ng van x gi v dng bm

p lc nng p ln n gi tr p yu cu, p sut cn th bng 1.5 ln p sut lm vic ca ng ng.

- Nh A:

+ T tng U01 n tng 10 p sut th : 15 kg/cm2.

+ T tng 11 ln n tng 20 p sut th : 8 kg/cm2.

- Nh B1 n B10 v cc nh BB p sut th : 8 kg/cm2.

- Thi gian th p l 2 gi khng c mt p sut trong ng ng.

- Ti thi im bt u nim phong p sut lu li thng s p lc nc, nhit mi trng xung

quanh. Sau 2 gi th nghim ghi li kt qu p lc nc v nhit mi trng xung quanh. Nu

khng mt p sut th hon tt qu trnh th p.



20/72

Trang20/72

Chi tit th x ng ( nm ngang)

Chi tit th x ng ( chiu ng)

B. SN NG NC CHILLER

Trc khi cch nhit ng v sinh sch thnh ng v sn chng r st.

V sinh b mt thnh ng cho sch.

Qut sn chng r st ln b mt thnh ng

S lng sn (Kg) cho 1 lp ln b mt thnh ng c 6 m2/Kg

S lng sn (Kg) cho 2 lp ln b mt thnh ng c 4 m2/Kg

Air bleeding

valve

Main pipe

Gate Valve

Branch pipe

Pressure gauge shall be

attached at most farthest

point of each section. All

other pipe shall be

After pipe leakage test,

drain out water.

Branch pipe

Use this

Capacity of Portable motorize pump

Spraying Irrigation

1000 r.p.m 1200

17 Suction ( L/min ) 29

15-35 Pressure ( kg/cm2 ) 10 or 20

1.5-2 Power ( HP ) 2Pressure gauge



21/72

Trang21/72

C. CCH NHIT NG CHILLER & NG X MY LNH

1. Phm vi cch nhit

ng nc lnh (chiller) v ng nc x my lnh v cc thit b kt ni trn ng ng.

2. Tng qut

- Vt liu cch nhit c ban qun l d n ph duyt v TVGS nghim thu trc khi lp t.

- Sau khi ng c trin khai v lp xong, th tin hnh bc cch nhit (tr nhng mi hn).

- Trc khi cch nhit ng phi c v sinh sch s.

- Lp cch nhit phi ng kch c ng.

- Cc im ni ca cch nhit phi c qun lp bng keo chuyn dng.

- Sau khi cch nhit xong th mi tin hnh bc lp chng chy (i vi khu vc chng chy)

- Sau khi th p lc xong th tin hnh bc cch nhit cc mi hn v cc ph kin trn ng ng.

- Vt liu cch nhit v qu trnh thi cng phi tun th yu cu k thut nhm m bo khng b ngng

t nc v bc bn ngoi trong cc iu kin nh sau:

Nhit trung bnh ngoi tri : tn= (30 38 )oC.

m tng i trung bnh ngoi tri : n= (70 85)%.

Nhit ca nc lnh bn trong ng tnl= (8 -14)oC.

- Ton b cc ph kin, van kho, lc cn, mt bch... u phi cch nhit ton b. Cc khe ni phi c

lm kn kht bng keo silicoll. Phn cch nhit phi c thc hin sao cho c th tho ri ng c,

gung bm v cc van kha m khng ph hng lp cch nhit.

- dy lp cch nhit cho tng c ng tun theo h s trnh c TVGS v BQL ph duyt.



22/72

Trang22/72

3. V d v vic nn lm hay khng nn lm ca cng vic cch nhit

Nn lm theo Khng nn lm

1- Lau sch bi, du cch nhit trc khi bi

keo cch nhit

Bi keo cch nhit vo b mt tch ra y bi v du.

2- Lun lun bi keo cch nhit bng li dao Bi dy keo cch nhit v keo ng li trn b mt

3- Trnh cho khng kh lt vo trong lc bi

keo cch nhit trn b mt kt ni.

Ch dn bng keo ti ch kt ni lm cho khng kh lt

vo gia ng lnh v khng kh vy quanh.

4- Trong mi trng m t nn thng gi. Vt liu bao ngoi (bng keo nha, ci bao

ngoi gim nhit) khng cht lm cho hi m

t lt vo khe h gia vt liu bao ngoi v

cch nhit

5- S dng vt liu cch nhit ph hp vi kch

thc ca ng cn cch nhit.

Cch nhit c kch thc ln hn ng cn cch nhit

d dng cch nhit. Nhng n lm cho khng kh vokhe h gia ng lnh v cch nhit, v xy ra ngng t

gia chng.

6- Bi keo vo c hai mt ch mi ni, v i

n khi cm gic x vo thy kh.

Keo cn t khng dnh cht chn, v d b

tch ra.

Hnh 13 Cng vic lm v khng nn lm khi cch nhit



23/72

Trang23/72

4. Chi tit cnh nhit cho ng thng loi ln

- S dng loi tm cch nhit nh hng dn sau y

Hnh.14- Ly du v ct tm cch nhit dng cho ng ln

Hnh 15- Chi tit ca aeroflex cch nhit cho ng thng

Hnh.16- Chi tit cch nhit ti bt ng (gi ng)

1. Tm cch nhit dng hnh tr s c gic nh vi ng bng keo

3. Dn bng keo chng ln 2 m ghp

2. Bi keo vo hai mt ca mi ghp cchnhit dng hnh tr, ch kh sau dn li

ng

Ly du: S dng khoanh Cchnhit ly du cho ng ln

Ct: S dng tm cch nhit ctra theo kch thc ng ln

Gi bng thp hnh

Cng UBt ng

ng

cch nhit dng hnh tr s cgi c nh vi ng bng keo

Bi keo vo b mt ch k t n i cch nhittip xc vi b mt bt ng

Bi keo vo hai mt ghp n ica cch nhit dng hnh tr



24/72

Trang24/72

5. Cch nhit bng phng php lng ng nh vo trong ng cch nhit.

- Phng php lng ng cch nhit vo ng nh Hnh.17.

Hnh17 - Phng php lng ng cch nhit cho ng

6. Cch nhit bng phng php ct x dc ng cch nhit

- Phng php ct ng cch nhit theo chiu dc nh Hnh.18.

Hnh18 - Phng php cch nhit ng bng cch ct dc ng cch nhit

7. Phng php cch nhit cc ph kin

- Phng php cch nhit cc ph kin nh nh Hnh.19.

Hnh.19 - Phng php cch nhit cc ph kin

C t dc ng cch nhittheo chiu di ng

1

Lm sch, bi keoln hai mt thnh ngcch nhit

2

Khi b mt keo kh(s khng dnh) ta p2 mt m ghp dnh

li vi nhau.

43

Chcho keo kh

1

Dng dao c t vunggc vi trc ng,

2

Lu n ng cchnhit vo ng .

3

Lun ng qua ccco

4

Lm sch b mtv bi keo

5

Khi b mt keokh (s khngdnh) ta p 2 mtm ghp dnh livi nhau.

1

C t ch to cc cchnhit cho ph kin

2

Bc cc cch nhitch to sn vo phkin

3

Cch nhit co 90

4

Lm sch, bi keoln hai mt thnhng cch nhit

5

Khi b mt keokh (s khngdnh) ta p 2 mtm ghp dnh livi nhau.



25/72

Trang25/72

8. Chi tit cch nhit cho mt bch

- Xc nh kch thc ng knh ca ng (D).

- Xc nh kch thc ng knh ngoi ca mt bch (d).

- Ct ri mt khoanh cch nhit t tm hay cun cch nhit

- o kch thc khong cch (a) gia hai khoanh cch nhit dn vo ng t ch mp ngoi.

- o kch thc chu vi (P) ca khoanh cch nhit bng tm cch nhit

- Bi keo cch nhit vo tt c cc mt, rp v p gi chng li vi nhau.

Hnh 20- Chi tit ca cch nhit mt bch

9. Chi tit cch nhit cho khp ni mm

- Tng t nh chi tit cch nhit cho mt bch

Hnh 21- Ct vt liu cch nhit v cch nhit cho khp ni mm

d: ng knh ngoi ca mt bchD: ng knh ca nga: Khong cch gia hai khoanh cch nhitdn vo ng st mt bchP: Chu vi ca khoanh cch nhit

aKt ni mt bch

ng

Cch nhit c gi c nhvi ng bng keo cch nhit

Bi keo dn cch nhit voc hai mt kt ni cch nhit

a

Pd

D

a

Flexible

Cch nhit c gi cnh vi ng bng keocch nhit cch nhit

Bi keo vo c hai mtkt ni cch nhit Kt ni mt bch

ng

a

Pd

Dd: ng knh ngoi ca mt bchD: ng knh ca nga: Khong cch gia hai khoanh cch nhitdn vo ng st mt bchP: Chu vi ca khoanh cch nhit



26/72

Trang26/72

10.Chi tit ca cch nhit van cng

- o ly du ng knh ng, ng knh ngoi ca mt bch v spindle housing. Xem Hnh.22

oLy du v ct tm cch nhit theo ng knh ng v mt bch lm khoanh cch nhit.

oXc nh khong cch gia hai khoanh cch nhit (f) v bc ngoi phn nh ln ca van.

oXc nh chu vi ca khoanh cch nhit (P1).

oCt tm cch nhit theo kch thc (f) v (P1) v sau xc nh ng knh (c) ca thn van (ct ra

ngoi mt na ng trn ng knh (c) bn phi v bn tri ca tm cch nhit c kch thc (f) v

(P1))

- Phn nh ra ti mt bch trn ca van, xem Hnh.24

o o khong cch nh ln (s) ti mt bch trn ca van vi khong cch ngn nht (a) v khong

cch di nht (b) cng nh chu vi (P2) ca phn trn van.

o Ly du trn tm cch nhit vi khong cch ca phn nh ln (khong ngn nht (a) v di

nht (b)) k ng trn c cng bn knh qua 5 im v ni chng li.

o Ct phn khng lin quan ra.

o Ct nghing trn mt mt ca g im cao nht.

Hnh 22- Ly du v ct tm cch nhit (phn thn van)

f

P1

P1

f

o chu vi ng P1 v khong cch2 mt bch

Chuy n i kch thc o ctrn tm cch nhit

Ct ra ngoi 2 khoanh Aeroflex(Theo ng knh ng v mt bch)



27/72

Trang27/72

Hnh 23-Ly du v ct tm cch nhit (phn thn van)

11.Chi tit ca cch nhit cho T (T)

Cch nhit cho T (T) cng tng t nh cch nhit cho van nhng n gin hn.

Hnh 24- Chi tit cch nhit cho van

P2

P2

o khong cch nh ra ti mtbch trn ca van, vi khongcch ngn nht (a) v di nht (b),cng nh chu vi (P2) ca mt

bch trn ca van

Ct ra phnkhng lin quan

K ng congqua 5 im

Ly du trn tm cchnhit khong cch ngnnht (a) v di nht (b)cng nh chu vi (P2) cam t bch trn ca van.

Ct nghing trnmt mt ca gim cao nht

Tm cch nhit bc ngoi van sc gi c nh bng keo

Honthin

Bi keo vo c hai mt kt ni cacch nhit v quanh than van

Bi keo xung quanh c hai ph kin vcch nhit gi cht chng li vi nhau

Bi keo t v tr 1ti v tr 4



28/72

Trang28/72

12.Chi tit cch nhit cho ng ph kin gim cp

Hnh25 - o cc kch thc ph kin

Hnh26 - ly du trn tm cch nhit

Hnh.27 - o, ly du v ct tm cch nhit

Hnh.28 - Qu trnh bi keo v dn ng hon thin

h

Dn cc b mt mi ni cch nhitHon thin

Bi keo ln b mt m i n i cch



29/72

Trang29/72

13.Chi tit cch nhit cho Co

Hnh 29 - o chu vi

Hnh 30 - o cc on cong

Hnh 31 - Qu trnh bi keo dn ng hon thin

o chu vi ngTri n khai kch thc o c trn t m cch nhit

PP

To 3 cung trn

H1 H1H2

P

H1

o chi u cao ca cungtrn bn trong

H2

o chiu cao ca cungtrn bn ngoi

To cung trn bi compa

Ni cc ng cong li sau dng dao ct

Bi keo v dn chng li Bi keo v dn chng li Hon thin

Trin khai kch thc o ctrn tm cch nhit

H1 H1H2

P



30/72

Trang30/72

14. Chi tit cch nhit dung cho ng xuyn sn hay tng

Hnh 32 - Chi tit ca cch nhit cho ng xuyn tng, ng xuyn sn

15.Chi tit cch nhit cho bm chiller

Hnh 33 - Cch nhit cho bm nc lnh (chiller)

Cch nhit s c dn dnhbng keo

V bc bo v

Bbm

ng cKhp ni

ubm

Ni mt bch

Cch nhit s c dn dnhbng keo

Ni mt bch

Ni mt bch

u bm

Bbm

Chi tit ca cch nhit dng cho gi ng xuyn tng hay sn

Gi ng Cng U

Thp gc

ai c

Chi tit ca cch nhit Aeroflex dng cho ng xuyn sn btng

Len khiCht chng chy

Thp V

Sn btng

Cng U

Gi ng

Tck

ng

Bi keo vo b mt ch ktni cch nhittip xc vi

b mt gi

Cch nhit c gic nh bng keo

Sleeve

Chi tit ca cch nhit dng cho ng xuyn tng

ng lng

Cch nhit

Tng

Bi keo vo b mt chkt ni cch nhit tipxc vi b mt gi

ng

Cng U

Tck

Bng khongThp L

Gi

Cch nhit c gic nh bng keo



31/72

Trang31/72

C. LP T H THNG NG NG THOT NC NGNG T

Tt c ng ng nc ngng khi a vo thi cng u phi m bo cc tiu chun thit k v c

bo n cch nhit m bo k thut.

Lp t ng ng thot nc ngng: ng ng trc khi a vo lp t u phi lm sch c hc

ch bi keo dn. ng ng thot nc ngng t khi lp t c dc cho nc c thot t donhanh, trnh hin tng ngng t. Trn on ng thot chnh ta lm cc l thot kh theo tiu chun Vit

Nam trnh hin tng ngng t nc trn ng ng.

D. CNG TC HON THIN

Lp ng v chi tit n u th dng quang treo hoc gi nh v ng n , cn chnh c 3 chiu

dc ngang, v cao cho tuyn ng nm ng v tr. Tin hnh chn trt cc v tr ng i qua. Nu tng

trong nh th chn bng gch l v va xi mng, nu l tng ngoi nh phi chn bng gch c v va

xi mng, nu l sn v trn b tng th phi chn bng b tng v trt li m bo phng m bo m

quan v trnh nc thm vo nh.



32/72

Trang32/72

V - BIN PHP T CHC THI CNG H NG GI

A. TNG QUT PHNG PHP CH TO V THI CNG H NG GI

ng gi c ch to ti xng c kh REETECH da trn tiu chun DW/142. ng gi thnh phm

c vn chuyn n cng trng tp kt lp t

a. Kch thc ng gi s tun theo ti liu k thut v bn v thi cng.

b. Tt c cc ng gi vung v ng gi trn c ch to sn t tn cun xng sn xut. Trong qu trnh

ch to ti xng sn xut ng gi c kim tra. Sau khi ch to xong ng gi, phn xng phi kim

tra li kch thc thnh phm.

c. ng gi s c kim tra v nghim thu trc khi bc bo n v lp t ti cng trnh.

d. ng gi trn c cun trn bng my cun v to mc kt ni.

h. Khe h xung quanh ca ng gi xuyn qua tng s lp y bi bng khong chng chy.

m. ng gi s treo chc chn trn cu trc sn hoc khung trong to nh.

n. Ch to v lp t ng gi m bo tt c cc iu kin hot ng ca h thng.

B. NG GI VUNG

1. dy tn ch to ng gi: Danh mc b dy ca tn theo bng 8

Bng 8 - Danh mc b dy tn

dy tn (mm)Kch thc ng gi

Kch thc cnh ln nht (mm) ng c p sut thp v trung bnh

P 1000 Pa

ng c p sut cao t

1000 Pa < P 2500 Pa

Cnh ng gi 400 0.58 0.75400 < cnh ng gi 1000 0.75 0.75

1000 < cnh ng gi 1600 0.95 0.95

1600 < cnh ng gi 2500 0.95 1.15

2500 < cnh ng gi 3000 1.15 1.15

2. Qui cch kt ni :

a) Loi kt ni bng np C v mt bch ng gi theo bng 9.

Bng 9 - Loi mt bch kt ni ng gi

Kch thc ng giKch thc cnh ln nht (mm)

Loi mt bch kt ni

cnh ng gi 300 np C

300 < cnh ng gi 1200 np TDC

1200 < cnh ng gi 1600 L40 x 40 x 3

1600 < cnh ng gi L40 x 40 x 3

b) Kch thc ca bulng kt ni cho mt bch ng gi theo bng 6.



33/72

Trang33/72

Bng 10 - Kch thc bulng

Kch thc cnh ng gi (mm) ng knh x chiu di (mm)

Nh hn hoc bng 750 M8 x 30

Ln hn 750 M8 x 30

c) Kt ni mt bch loi thp gc L :

Hnh 34 - Chi tit kt ni mt bch st gc L

d) Kt ni mt bch np TDC (Transverse Duct Connector)

- Kt ni TDC dng cho ng gi c kch thc ln hn 300mm n 1200mm.

Gp m 5mm hay hn

Chi tit ca gc mt bch st L

Mt bch

L bulong(10mm)

Gp m 5mm hay hn

inh tn hoc rt rivet

5mm

GiongVng m

ai c

Chi tit ni ng ni bch st L

Bulong M8

GcBch TDC rng30mm hoc hn

Giong ni 2u ng gi

ai c M8

Mt ct ca ni bch

A, B : Kch thc ng +5mm+C

150

mm

150

mm

150

mm

150

mm

150

mm

A

Kch thc ng + 5mm

CB

L bulong mt bch st LC nh 4 gc



34/72

Trang34/72

Kch thc, b dy v khong cch ca mt bch TDC theo bng 11.

Bng 11 - Kch thc, b dy v khong cch ca kt ni TDC

Kch thc ng gi

theo cnh ln nht

(mm)

Kch thc

np TDC

(ti thiu)(mm)

B dy gc

TDC

(ti thiu)(mm)

B dy np gi

(ti thiu) (mm)

Khong cch ti

a

(mm)

nh hn 750 30 1.2 1.0 1250

750 ~ 1,200 30 1.2 1.0 1250

Kch thc ca bulng kt ni mt bch theo bng 10.

Hnh 35 - Chi tit kt ni TDC

3. Gia c ng gi

a) Gia c dng thp gc loi L

- Trc tip theo chiu dc: gia c thp loi L dng cho kch thc ng ln hn 800mm m bo ng

gia mt trong hoc mt ngoi ca ng gi.

- Kch thc thp loi L dng gia c theo bng 8, Chi tit gia c tng cng nh hnh 36

Bng 12 - Kch thc thp loi L dng gia c (Trc tip theo chiu dc)

Kch thc ng gi, Cnh di nht (mm) Kch thc ca thp gc (mm) S ng gia c

1000 ~ 1500 L30 x 30 x 2.5 1 ng ti tm

1500 ~ 2200 L30 x 30 x 2.5 2 ng chia u tm

Ln hn 2,200 L30 x 30 x 2.5 3 ng chia u tm

A B C

A

B

C

Np TDC

A: 150mm hoc nhhnB: 200mm hoc nhhnC: 150mm hoc lnhn

C

C

ng

Mi ni gc kiu TDC

ng

Np TDC Giong m kn

Gc TDC



35/72

Trang35/72

Hnh.36 - Chi tit gia c ng gi bng thp gc loi L

b) Phng php gia c to gn

- Chiu rng hay chiu cao ca ng gi l 450mm hoc ln hn th s c gia c vi khong gia c t

trc gn l 300mm. Chi tit gia c gn tng cng nh hnh 37.

- Nu cc ng gi gim c chiu rng W bn u gim nh hn 750mm th khng tng cng dc.

Hnh.37 - Chi tit ca gn tng cng

Gn tng cng su khong 3mm, rng 10mm.

B B B B B B

Ghi ch B 250mm

Gn tng cng B B B B

Rib

B

B

B

B

Gn

30mm hoc nhhn

A

900mm

900mm

900mm

B900mm

B

Mt bch

B B

Chi tit A

Chi titlA

Rivet

Thp

Thp gc L gia c b mt trong

A

:Np TDC < 1200mmMt bch < 1,200mm



36/72

Trang36/72

4. Cu to cc mi ghp thn ng gi

- Nhng ng ni gc theo chiu dc: mi ghp thn ng gi (Pittsburgh Lock)

- Khi kch thc ng gi hay ph kin c kch thc vt qu kh tn, hoc trong trng hp c bit cn

phi ni trn thn ng, mi ni c th nm bt k v tr no trn chiu rng hoc chiu cao nhng trnh ch

m l ng nhnh.

Hnh 38 - Chi tit ca ghp ni gc v dc thn ng gi

Hnh 39 - Chi tit v tr tng i mi ni dng cho ng thng

Hnh 40 - Chi tit v tr ghp n dng cho ph kin v gim cp

5. Ch to co ng gi

V tr ca mi ni dng cho ng gi thng

ng gi

V tr mi ni theo chiu ngang V tr mi ni chiu dc

ng

Mi ni theo chiu ngang

Mi ghp gc ng gi

5mm

10-15mm

7-10mm

Hng gi

Mi ghp dc thn ng gi

ng

ngng



37/72

Trang37/72

Ch to co ng gi nh sau:

- Co ng gi c ch to theo kch thc bn v thit k c ph duyt, ph hp cho vic lp t

ca tng khu vc.

- i vi cc co ngn s lp thm cc cnh hng dng theo hng dn DW/142

- Cnh hng dng cng c lp cho co vung nh hnh 42, 43 di y

Hnh. 41 - Chi tit ca co ng gi Hnh 42 - Co ng gi vung c hng dng

S ca cnh hng dng N=(6H/W)-1

r

ng tm

W

Khung cnh hngdng

150mm

P

P

P

Hng gi

H

H150mm

W

P

A

A

2A



38/72

Trang38/72

Khong cch gia cc cnh A=H/(N+1)

Bc gia 2 cnh hng dng P=1.41A

Hnh 43- Chi tit ca cnh hng dng

6. Cu to ghp ng gi nhnh.

Ch to ng gi nhnh nh hnh sau

Hnh 44 - Chi tit ch to ng gi nhnh

C. NG GI TRN :

1. B dy ng gi trn

- B dy tn theo bng 13.

- Kch thc ca ng gi l kch thc trong cng 2mm (0~+2mm).

Bng 13 - Danh mc b dy ng gi trn

ng knh ng gi trn (mm) dy tn

(mm)

Nh hn 700 0.58

700 < ng knh ng 900 0.75

900 < ng knh ng 1500 0.95

2. Chi tit ni ng gi trn

Chi tit ni ng nhnh tndy 0.75mm v mng hn

ng chnh

Silicon lmkn

10 -15mm

W

L

C

L>0.3W, hay bng 150mm

Hng Hng

Hng giChi tit ni nhnh tn dy

0.95mm v dy hn

Rivet

St L 30 x 30,Bulong, ai M8

Gp m 5mm hoc

Silicon

ng

ngnhnh



39/72

Trang39/72

Bng 14 - on ni ng gi trn

ng knh ng gi trn (mm)u ni S

(mm)

dy tn

(mm)

Nh hn 700 60 0.75

700 < ng knh ng 900 80 0.75900 < ng knh ng 1500 100 0.95

3.Ch to v lp ng gi trn

- Co ng gi c ch to theo kch thc bn v thit k c ph duyt, ph hp cho vic lp t

ca tng khu vc.

- Hnh 45 a ra cc khong cch ti thiu lp ph kin k nhau.

Ch : Hnh dng v kch thc ng gi nhnh thng c th hin trong bn v thi cng

Hnh 45 - Chi tit ng gi nhnh thng

D. NG GI CHNG CHY

- ng gi chng chy s s dng vt liu tm chng chy ch to.

10mm

S

on ni ng

ng gi

S

ng gi

Silicon lm

kn

Rivet Rivet



40/72

Trang40/72

- Vt liu tm chng chy s c trnh BQLDA v TVGS ph duyt.

- Cc ng gi chng chy s c ct v lp ghp vi nhau bng vt xoy, theo ng kch thc ca bn v ph

duyt.

- Gia cc mi ni s dng keo chng chy bi kn nhm khng cho r r gi.

- ng gi chng chy c lp t tng t nh ng gi vung.

- Cc ng gi i ngang qua cc khu vc cn chng chy s c bc thm bn ngoi 1 lp tm chng chy.

Hnh 46 Hnh lp t ng gi bng tm chng chy

E. CCH NHIT NG GI

1. Phm vi dng cch nhit

- H thng ng ng gi iu ha khng kh (ng gi cp v ng gi hi)

2. Phng php cch nhit ng gi

- Cc vt liu s dng c ph duyt

ng gi vt liutm chng chy

Vt xoy

Tm lin ktcc on ng

Gi ng



41/72

Trang41/72

- ng ng gi HKK s c cch nhit bi bng thy tinh c tm nhm bao quanh mt ngoi, b

dy: 50mm, t trng: 32kg/m3, nhm dn nhit nhit trung bnh l 500C vi h s dn nhit

lambda = 0.044W/m0K.

- Dng keo chuyn dng dn inh ln ng gi theo qui cch sau: Khong cch gia cc inh dn ln

b mt ng gi gi lp cch nhit nh hn hay bng 250mm. chiu di inh l 75mm

- Ti mi ghp gia hai tm len thy tinh cch nhit s khng c khe h. Cc mi ghp ny s khng

trng nhau.

- Khi cch nhit xong ti ng ghp ca tm len thy tinh s c dn kn bng bng keo nhm.

Hnh 47 - Phng php cch nhit dng cho ng gi

Hnh 48 - inh dn cch nhit ng gi v vng m

24mm

24mm

24mm

inh dn cch nhit ng giVng m

LGhi ch:L = 75mm (B dy len cch nhit l 50mm)

= 1.6mm

Kch thc tri rng dng ct len:

B dy ca len ng gi trn ng gi vung

50mm P + 305mm P + 254mm

P: Chu vi ng gi

Bng keo nhm

Vng mng gi

AA

inh dnA 250mm

Tm nhm bao quanh mt ngoi

Bng thy tinh cch nhitdng cho ng gi HKK

250mm

Duct

Bng keo bc

Tm nhm bao quanh mt ngoi

Vng m

Len thy tinh cch nhitdng cho ng gi HKK



42/72

Trang42/72

Hnh 49 - Phng php cch nhit mi ni mt bch v TDC

100mm60mm

pvo

p vo

Ni mt bch

50mm100mm

ng

Ni TDC

50mm100mm

Mi ni mt bch hay TDCinh dn cch nhit v vng m Bng keo nhm

Len thy tinh cch nhit dng cho ng gi

25mm

50mm

60mm

60mm 60mm100mm

Keo dn inh cch

Vng m



Bng keo bc

Bng keo nhm




Bng keo bcVng m

Tm nhm bao quanh mt

Tm nhm bao quanh mt

Tm nhm bao quanh mt

Keo dn inh cch

ng

Tm nhm bao quanh mt

Vng m

Bng keo nhm

Nhn trn xung



43/72

Trang43/72

Hnh 50 - Nhng chi tit cch nhit dng cho ng gi trn xuyn sn

Hnh 51- Nhng chi tit cch nhit dng cho ng gi ch nht xuyn sn

ng gi trn

Thp L

Tck

Nh phng php cch nhitcho mt bch hay TDC

Mt bch hay TDC

Sn btng

Bng khongng gi cp (B dy: 50mm)

Cht bo v chng chy (dngcho kh vc chng chy)

FD

Len thy tinh cch nhit bn ngoing gi s c gi c nh vi nggi bng nhng inh dn cch nhitv vng m

Thng sn

ng gi ch nht

FD



Cht bo v chng chy (dngcho kh vc chng chy)

Mt bch hay TDC

Sn btng

Thp L

Thng sn

Nh phng php cch nhicho mt bch hay TDC

Tck



44/72

Trang44/72

Hnh 52 - Chi tit cch nhit ng gi trn xuyn tng

Hnh 53 - Chi tit cch nhit ng gi vung xuyn tng

Ty treo

FD Tng

L xuyn tng

Sn btng

Nh phng php cchnhit cho mt bch hayTDC



Cht bo v chng chy (dng

cho kh vc chng chy)

Mt bch hay TDC

Tck

ng gi trn

Ty treo

Tck

Tng

FD ng gi

Sn btng

Nh phng php cch nhitcho mt bch hay TDC

Mt bch hay TDC

Len thy tinh cch nhit bn ngoing gi s c gi c nh ving gi bng nhng inh dn cchnhit v vng m

L thng tng


Cht bo v chng chy(dng cho kh vcchng chy)

Ch t

t c

ch nh

t ty treo

Sn btng

Ty treo TckThp np

FD

Len thy tinh(Bdy 50mm)

Bng keo bc

Bng keo bc



45/72

Trang45/72

Hnh 54 - Chi tit cch nhit dng cho kt ni vi bt

Ni mm

N mt bch

p y bng thy tinhBng thy tinh dng cch nhit

Ch t t A

Ch t t

ng gi

150mm

Bng keo bc

Kt ni mt bch

Ni mm

100mm

Bng thy tinh cch nhit bn ngoing gi s c gi c nh vi nggi bng nhng inh dn cch nhitv vng m

p y bng thy tinh cchnhit dng cho ng gi HKK

inh dn cch nhit v vng m

ng gi

ng gi

Vng mBng keo bc

Bng keo bc

Bng thy tinh dng cch nhit

ng giinh dn cch nhit



46/72

Trang46/72

Hnh.55 - Chi tit cch nhit hp ming gi khuch tn

Hnh 56 - Chi tit cch nhit ming gi khuch tn (Loi gn tng)

Np thpMing gikhuch tn

Sn btng

Cao su xp

m kn

Tng

inh vt ng gi mm

RivetBng keo bc

Ty treo Tck

ng gitrn

Bulng v c tn

Sn btng

Tck

Bulng v c tn

Ty treo

Bng thy tinh cch nhit bnngoi ng gi s c gi c nhvi ng gi bng nhng inh dncch nhit v vng m

Bng thy tinh cch nhit bnngoi ng gi s c gi c nhvi ng gi bng nhng inh dn

cch nhit v vng m

Np thp

Hp bao kn

Trn nh

inh vt

Bng keo nhm

Bng thy tinh cch nhit bnngoi ng gi s c gi cnh vi ng gi bng nhnginh dn cch nhit v vngmBng thy tinh cch nhit bn trong

hp gi s c gi c nh vi hpgi bng nhng inh dn cch nhit

v vng m


Chiu gi vo



47/72

Trang47/72

Hnh 57 - Chi tit cch nhit ming gi khuch tn (Loi gn trn)

Ming gi khuch tn

Trn nh

inh vt tar

Khung inh vt

Thp v rivet

Hp bao kn

Bng thy tinh cch nhit bn

trong hp gi s c gi c nhvi hp gi bng nhng inh dncch nhit v vng m

Hng gi vo


Bng thy tinh cch nhit bn

ngoi ng gi s c gi c nhvi ng gi bng nhng inh dncch nhit v vng m

Cao su xp m kn



48/72

Trang48/72

Hnh 58 - Chi tit cch nhit ming gi linear diffuser

Hnh 59 - Chi tit cch nhit ming gi

F. LP T NG GI

Linear diffuser

Trn

C nh inh vt

Thp v rive

Bng thy tinh cch nhit bn tronghp gi s c gi c nh vi hpgi bng nhng inh dn cch nhitv vng m

Hp bao kn


Hng gi vo


Tng

inh vt

Khung

ng gi


inh vt



49/72

Trang49/72

1. Ty treo v gi cho ng vung

- Dng ty treo v thp gc L lm gi cho ng gi

Bng 15 - Bng qui cch ty treo v gi ng gi vung

Kch thc ng giKch thc cnh ln nht W

(mm)

Loi thp gc L

(mm)

ng knh tytreo

(mm)

Khong cch hai gi ng ln nht

(mm)

W 1000 30 x 30 x 3 8 2500

1000 < W 2000 40 x 40 x 4 10 2500

2000 < W 3000 Ty vo tng trng hp chn gi cho ph hp

Hnh 60 - Cc chi tit ty treo v gi

ng

Thanh ren

L: Theo bng 11

20mmTc k n

Thanhren

W+40

W

Thp gc L

W: Bao gm c bo n



50/72

Trang50/72

Hnh 61 - Cc chi tit ca ty treo v gi

(ng gi vung: Thng ng xuyn sn)

Hnh 62 - Nhng chi tit ty treo v gi

(ng gi vung: ng gi thng ng trn tng)

Bu lng, ai c

ng

Thp gc loi L

ng

N b tng

Bulng n

m cao su (ch cho ngkhng bc cch nhit)

Thp gc loi L

m cao su

Bng khong

ng

Van

m chng chy(p dung cho khu vc chng chy)

Bulng n

Bulng & ai c

Thp gc loi L



51/72

Trang51/72

2. Ty treo v gi cho ng trn

Bng 16 Bng qui cch ty treo v gi ng gi trn

ng knh ng gi trn

D

(mm)

Loi ai treo

(mm)

ng knh ty

treo

(mm)

Khong cch hai gi

ng ln nht

(mm)D 500 30 x 2.5 8 3000

500 < D 1000 30 x 2.5 10 3500

Hnh 63 - Cc chi tit ty treo v gi (ng gi trn: Nm ngang)

Kch thc ng 500 v ln hn

A L L

Ty treo

ng son

L: 3500mm v nh hnA: 300mm v nh hn

Bulong n

Ty treo

ai treo ng

ng trn

Kch thc ng 500 v nh hn

L: 3000mm v nh hnA: 300mm v nh hn

A

L L

ai treo ng

ng son

ai treo ng

Ty treoTck



52/72

Trang52/72

Hnh 64 - Cc chi tit ty treo v gi (ng gi trn: Thng ng)

3. Gi c nh

a) Gi c nh phi gn c nh trn sn hoc .

b) Khong cch t gi c nh nh hn hay bng 12,5m.

Hnh 65 - Nhng chi tit ca gi c nh

12,500mm v nh hn

Gi d c nh

ng

ng ng

Thp gc loi L Dm

Thp gc loi L

4 im nibng vt

ai gi ng

Kch thc ng 500 v nh hn

N btng

Ging cao su (chdng cho ngkhng c cch

nhit)

ng ng

Mi hn

Bu lng v ai c

Chi tit A

Thp gcloi L

ai gi ng

N btng

ng ng

Kch thc ng 500 v ln hn

4 i m nibng bulng& ai c

Chi titA

Gingcao su

ai gi ng

Thp gcloi L



53/72

Trang53/72

Hnh 66 - Chi tit kt ni Ni mm gia ng gi v thit b

4. Van iu chnh lu lng gi VD(volume damper)

- VD bao gm khung, cnh iu chnh quay trc bi tay chnh.Cnh VD s lm thay i lu lng gi

v s khng rung v n. Ch lp VD xem hnh 67.

Hnh 67 - Nhng chi tit lp VD

5. Van ngn chy FD (Fire Damper).

- FD c tc dng cch ly, ngn chn la, kh c nhit cao xm nhp qua cc khu vc khc bn

trong ng gi.

- FD phi c gi bng ty treo c lp.

LMt bch

Khp ni vi btChi tit A

L:150mm v ln hn

Flangeng

m

rivet

Bu lng& ai c(M 8mm)

5mm

Ni mm

Chi tit A

inh vt Tm thp trng km

1Ti v tr t rung ng

2Ti v tr rung ln

VD

ng

Hng giVane

VD

Vane

Hng gi

ng

L

L8D v ln hn (theo bn v ph duyt)

D

Qut

VD

Hng ging



54/72

Trang54/72

6. Lp t ming gi

- Chni ming gi s c vng m v s dng nhng inh vt cng mu vi khung trn.

- Lp t ming gi m bo khng c l h di khung trn.

Ch : Chi tit lp t ming gi c th hin trong bn v thi cng.

7. Kt ni ng gi mm vi hp ming gi v VD: (xem hnh 7)

a. ng gi mm kt ni hp ming gi c buc bng dy thp 1.5mm v xung quanh dn

bng keo bc.

b. VD ni vi ng gi mm (Flexible duct) c buc bng dy thp 1.5mm v xung quanh

dn bng keo bc.

W150mm

H150mm H150mm

H150mm

150 mm v ln

150mm

WH

K K

WH WH

K

Kt ni vi ngKt ni vi ng hnh chai

H,W: Kch thc ca thng gi trn

Kt ni vi bung thng gi

Trn TrnTrn

K: 150 - 250mm

ng

ng

ng

Bung thng gi ng hnh chai ng

ng

150 mm v ln



55/72

Trang55/72

Hnh 7: Ni ng gi mm vi ming gi v VD

G. PHNG PHP TH X NG GI

1.Qui Trnh

a. ng gi trc khi th x c lm kn . ng gi chnh ln c bt bng mt bch , cn cc u nh

c bt kn bng nilong .

b. i vi h thng p sut nh v trung bnh ( p sut tnh 1000 pa ) th cc ming gi c thi cng

giai on hai v khng bao gm vic th x . Mi ni cui cng ny c kim tra bng mt .

c. Thi gian th x ph hp sau khi lp t ng ng gi v silicon kh .

2.Tiu chun k thut ca vic th x ng gi : Theo Tiu chun DW 143

Chng loi ng gi theo bng 1 bn di .

Van chnh gi

(VD)

Van chnh gi

Ming gi



56/72

Trang56/72

3.Nhng lu :

1) r r ln nht cho tt c cc di p sut c cho bng 2 hoc s dng gn ng bng cch p

dng cch tnh trung bnh cng ca gi tr p sut ni suy ra gi tr r r .

2) r r cho php ln nht cng c th tra trn th trn my .

3) Nu lng gi r r trong phm vi = 10% lng gi r r ln nht cho php th c xem nh t yu

cu hoc p sut c c = 5% p sut yu cu th cng c xem nh l t yu cu .

Nhng trng hp khc khng c xem l t yu cu .

Table-1: S phn loi ng gi v gii hn lng gi x

Ductwork Classification and Air Leakage Limits

Gii hn p sut tnh

Static pressure limit

Phn loi p sut gi

Duct pressure class

p sut

dng

Positive

(Pa)

p sut

dng

Negative

(Pa)

Vn tc gi

ln nht

Maximum air

velocity(m/s)

Lng gi x gii hn

(lt/giy/m2b mt ng gi ) Air

leakage limits liters per second

per square meter of duct surfacearea

p sut thp

Low-pressure - Class A500 500 10 0.027 x p0.65

p sut trung bnh Medium-

pressure -Class B1000 750 20

0.009 x p0.65

p sut cao

High-pressure - Class C2000 750 40

0.003 x p0.65

Note: p l p sut chnh lch , tnh bng pa .Where p is the differential, pressure in Pascals.



57/72

Trang57/72

Table-2: Air leakage rates

Maximum leakage of ductworkChnh lch

p sut tnh

Static

pressure

differential

p sut thp

Low-pressureClass A

p sut trung bnh

Medium-pressureClass B

p sut cao

High-pressureClass C

Pa Liters per second per square meter of surface area (l/s/m2)

100 0.54 0.18 -

200 0.84 0.28 -

300 1.10 0.37 -

400 1.32 0.44 -

500 1.53 0.51 -600 - 0.58 0.19

700 - 0.64 0.21

800 - 0.69 0.23

900 - 0.75 0.25

1000 - 0.80 0.27

1100 - - 0.29

1200 - - 0.30

1300 - - 0.321400 - - 0.33

1500 - - 0.35

1600 - - 0.36

1700 - - 0.38

1800 - - 0.39

1900 - - 0.40

2000 - - 0.42

Note: Recommended mean test pressures are highlighted in bold type with the actual selection being left to the testoperator.



58/72

Trang58/72

Figure.1: Permitted leakage at various pressures



59/72

Trang59/72

4.o t

a. Dng c th x : Cho ng gi .

Thit b th x c ni v hot ng theo ch dn . Nhn chung l c t trn b mt bng phng v

chc chn rng ng h o c t trn nh vi cht lng ng chng loi v c ch v tr s Zero

trc khi o . Manometer nm nghing c t l r r hoc p sut ri l cc tr s c th bin i

theo t l r r c ch dn theo th .

Manometer thng ng c p sut th .

chnh xc ca dng c th s nm trong phm vi : 10% ca lu lng ch th hoc 0,4 lt/s v c

ly theo tr s no ln hn v 5% ti p sut tnh ch th trong ng gi trong qa trnh th .

Cch th x ng gi c th hin trong hnh 2 ( figure.2 )

b. Cc bc th x ng gi

1) Chun b bin bn th (Bng tnh ton theo form bn di ).

2)Ni v iu chnh test rig cho ng vi p sut th .

3) Biu th t l r r .

4) Trt silicon li nu cn thit (Ch thi gian silicon kh).

5) Duy tr th trong 15 pht .

6) Tt v a tr s v zero.

7) Th li v kim tra cc tr s .

8) Ghi cc chi tit vo bin bn v cc bn k .

(Vui lng xem bng mu hon thin ca vic th x ng gi )

Lu : Khng th qu p h thng .



60/72

Trang60/72

Figure.2: Hints on Ductwork Leakage Testing



61/72

Trang61/72

Figure.3: AIR AT 16oC. 1000 m.b.



62/72

Trang62/72

Project Name: Tan Son Nhat International Airport Teminal Project Ref. Test Number: TSN / LTR / M / ****

Location of duct to be tested: Testing date: *************************

Floor: System: A/C Duct

Shop drawing number : Kind of duct: Galvanized steel sheet

Require test pressure classification: Duration of test : 15 minutes

Start time: ********************* Finish time: **************************

1. Part-1: Physical details

a) equire test pressure classification: Classs 'B'

b) est static pressure (Pa) : 500

c) eakage factor (l/s/m2): 0.51

d) urface are of duct under test (m2): 157.17

e) aximum permitted leakage (l/s): 80.16

2. Part-2: Test particulars

a) uct static pressure reading (Pa): 500

b) anufacturer and type of measuring device:

c) ange of measurement of flow measuring device (l/s): 0 to 400 l/sd) eading of flow measuring device (pascals): 82

e) Interpreted air flow leakage rate (l/s): 68

3. KTOM check:

Initial test pressure (Pa): Finish test pressure (Pa):

Ambient tem perature a t star t time: N/A Amb ient temperature at finish time: N/A

Comments:

Passed Failed

4. JAC comments:

No. Engineer Instruction / Comment On Site

Comments:

Passed Failed

ested by: REE Inspected by: KTOM JV Inspected by: JAC Approved by: JAC

Name: Name: Name: Name:

Signature: Signature: Signature: Signature:

Date: Date: Date: Date:

Example of a completed DUCTWORK LEAKAGE TESTING SHEET

With and depth or diameter(mm) Periphery (mm) Length (m) Area (m2)

A.D. Ltd , 504 Test Rig

(FROM RIG MANUFACTURERS LITERATURED

(FROM CALCULATION BELOW

(FROM REFER TO TABLE-3

(FROM DESIGNERS BY REFER T O TABLE-3

700x400 2200 19.85 43.67

600x400 2000 23.21 46.42

(READ OFF MANOMETER ON TEST RIG

(c x d

550x300 1700 12.56 21.35

600x350 1900 11.10 21.09

(PROVIDED BY DESIGNERS

157.17 Total

( DERIVED FROM CHART SUPPLIED WITH R IG USING "d"( SOME RIGS READ AIR LEAKAGE DIRECTLY

Calculation sheet for surface are of duct under test:

400x300 1400 15.46 21.64

(FROM RIG


(FROM DESIGNERS BY REFER TOTABLE-2

(FROM REFER TO TABLE-2

(FROM CALCULATION BELOW

(c x d



63/72

Trang63/72

Ref. Test Number: *Location of duct to be tested: Testing date: *************************Floor: System: A/C DuctShop drawing number: Kind of duct: Galvanized steel sheetRequire test pressure classification: Duration of test : 15 minutes

Start time: ********************* Finish time: **************************1. Part-1: Physical detailsa) Require test pressure classification:

b) Test static pressure (P a) :

c) Leakage factor (l/s/m2):

d) Surface are of duct under test ( m2): (e)e) Maximum permitted leakage (l/s):

2. Part-2: Test particularsa) Duct static pressure reading (Pa):

b) Manufacturer and type of measuring device:

c) Range of measurement of flow measuring device (l/s):d) Reading of flow measuring device (pascals):

e) Interpreted air flow leakage rate (l/s):

3. IBST check:Initial test pressure (Pa): Finish test pressure (Pa):

Ambient temperature at start time: N/A Ambient temperature at finish time: N/AComments:

Passed Failed

.

Tested by: REE Inspected by: I Approved by: :Name: Name: Name:Signature: Signature: Signature:Date: Date: Date:


(e)=(e1)++(en)Total

DERIVED FROM CHART SUPPLIED WITH RIG USING "d"

( SOME RIGS READ AIR LEAKAGE DIRECTLY

Calculation sheet for surface are of duct under test:

(en)

(FROM RIG

(READ OFF MANOMETER ON TEST RIG

( cx d

(a1) x (b1) (c1)=2(a1)+2(b1) (d1) (e1)=(c1)x(d1)

LEAKAGE TESTING RECORD - DUCTWORK LEAKAGE TESTING SHEE

With and depth or diameter(mm) Periphery (mm) Length (m) Area (m 2)

A.D. Ltd, 504 Test Rig(FROM RIG MANUFACTURERS LITERATURED

(FROM CALCULATION BELOW(FROM REFER TO TABLE-3

(

Project Name: DA 239/05 B cng An

(FROM DESIGNERS BY REFER TOTABLE-2)

(FROM REFER TO TABLE-2)

(FROM CALCULATION BELOW)

(c x d)

(PROVIDED BY DESIGNERS)



64/72

Trang64/72

BIN PHP T CHC THI CNG LP T THIT B HKK

Bin php lp t FCU: C 2 loi lp t FCU treo trn trn v t sn

Bng - Thng s lp t FCU

FCUB dy ca b my

(mm)

Tm gim rung

(tm)

Kch thc by

ng x nc

lnh (mm)

Kch thc

ca tck

(mm)

Kch thc

ca ty treo

(mm)

t sn 100 4 60 10 -Treo trn - 4 60 10 10

Lp t FCU t sn:

Ly du v xy b my trn sn

Vn chuyn FCU n v tr cn lp t bng xe y

Ly du trn b my ng tck v t tm m gim rung cho FCU

Chuyn FCU ln b my v gi c nh FCU trn b my. Kt ni ph kin. (ng gi, ng nc v in)


Nghim thu lp t FCU

Ly du v ng tck

t yu cu


Chuy n FCU n ni lp t

Kt ni h thng



65/72

Trang65/72

Chi tit lp t FCU t sn

Lp t FCU treo trn trn:

Vn chuyn FCU n v tr cn lp t bng xe y

Lp dn gio theo cao cn lp FCU.

Ly du trn trn ng tck v treo ty 10mm cho FCU

Chuyn FCU ln dn gio.

C nh FCU trn ty treo 10mm v chnh FCU theo ng cao yu cu.

Kt ni ph kin. (ng gi, ng nc v in)



66/72

Trang66/72

Chi tit lp t FCU treo trn

Bin php lp t qut: tng t nh lp t FCU


Nghim thu lp t qut

Ly du v ng tck

t yu cu


Chuyn qut n ni lp t

Kt ni h thng



67/72

Trang67/72

Bng - Thng s lp t qut

Trng lng qut

M(Kg)

B dy ca

b my

(mm)

Tm gim

rung

(tm)

Kch thc

ca tck

(mm)

Kch thc

ca ty treo

(mm)

50 v nh hn 100 4 10 10

50 n 150 100 4 12 12

150 v ln hn 100 4 16 16

Bin php lp t AHU:

Bng - Thng s lp t AHU

S chnh p sut

ca AHU

B dy ca

b my

(mm)

Tm gim rung

(tm)

Kch thc by

ng x nc lnh

(mm)

600 Pa 150 8 60

> 600Pa 200 12 75


Vn chuyn AHU n v tr cn lp t bng xe y ko.

Ly du trn b my t tm m gim rung cho AHU

Chuyn AHU ln b my.

Kt ni ph kin. (ng gi, ng nc v in)


Nghim thu lp t AHU

Ly du v t tm gim rungtrn b my

t yu cu


Chuy n AHU n ni lp t

Kt ni h thng



68/72

Trang68/72

Vn chuyn AHU n v tr lp t Chi tit lp t AHU

Bin php lp t bm nc:


Vn chuyn bm n v tr cn lp t bng xe y ko.

Ly du trn b my t tm m gim rung cho bm

Chuyn bm ln b my. Kt ni ph kin. (ng nc v in)


Nghim thu lp t bm


t yu cu


Chuy n bm n ni lp t

Kt ni h thng



69/72

Trang69/72

Vn chuyn bm n v tr lp t Chi tit lp t bm

Bin php lp t Chiller:

Ly du v xy b btng trn sn

Vn chuyn Chiller n v tr cn lp t.

Ly du trn b my t l xo gim rung cho Chiller

Chuyn Chiller ln b my v c nh Chiller trn b btng.

Kt ni ph kin. (ng nc v in)


Nghim thu lp t Chiller


t yu cu


Chuyn Chiller n ni lp t

Kt ni h thng



70/72

Trang70/72

Chi tit a chiller vo b trn tng mi

Chi tit lp t chiller

Bin php cu chiller ln mi : nh thu c in s b sung chi tit phn cu chiller ln mi nh,

sau khi cc t tnh k thut ca chiller c xc r nh: nhn hiu, cng sut, ti trng, kch thc



71/72

Trang71/72

VI - AN TON LAO NG, PHNG CHNG CHY N V BO

V MI TRNG

1. AN TON LAO NG

a. Tng quan.

Cc qui nh v an ton phi c p dng cho ton b k s, gim st v cng nhn thi cng trn

cng trng nh di y:

m bo tt c cc trang thit b an ton lao ng phi c cung cp trc khi bt u thi cng

bt c cc cng vic nh m bo h, ng, gng tay, knh

m bo cc trang thit b an ton lao ng cho ngi phi c mc, eo ng cch.

Cc dng c, my mc thi cng phi c kim tra bi ngi c chuyn mn trc khi a ra s

dng.

Ro chn, li bo v, bng cnh bo an ton phi c s dng trn cng trng.

Cc bnh cha chy phi c a ti cc v tr c nguy c xy ra chy n.

Thang v li thot him phi c cung cp chun b trong cc tnh hung khn cp..

Phi m bo nh sng khi lm vc ban m.

V tr lm vic phi c dn sch s loi b ht rc ri v cc vt nguy him.

Tt c cng nhn v cn b phi c hc qua cc kho hun luyn.

Phi c b phn ph trch ATL v c nht k ATL.

b. Cc cng vic vi my hn

Cng nhn thc hin phi c trang b knh, gng tay, m.

Cc bnh cha chy phi lun c t cnh ni lm vic

My hn phi c kim tra cn thn trc khi lm vic.

c. Lm vic trn cao:

Cc cng nhn phi eo dy an ton khi lm vic cao ln hn 2m.

Gio thi cng phi c mm, ging gio v c lp ng cch.

Phi c thang ch A s dng trong cc v tr ph hp.2. PHNG CHNG CHY N

Niem yet noi qui PCCC, bien cam la, cam hut thuoc, tieu lenh cha chay nhng ni de chay

no.

Thc hien cac bien phap, giai phap ky thuat e chong che va kiem soat chat che cac nguon

la, nguon nhiet, sinh la, sinh nhiet.



72/72

Hang hoa trong kho phai sap xep theo ung qui nh an toan.

Lap at cac thiet b bao ve cho he thong ien.

Khong nau an, lap ban th cung ni cong trng.

3. BIN PHP AN TON H THNG IN

Co u thiet b bao ve chong qua tai, ngan mach, s co ro ien.

Cam s dung ien bang cach au day pha cua mot nguon va day trung tnh cua nguon khac vao

thiet b.

Cam mac en chieu sang bang cach au mot au day vao day pha con mot au day cam xuong

at. Khong s dung ket cau cua nha xng lam day trung tnh.

May han phai dung day dan rieng e keo ve. Khong dung ket cau kim loai nha xng, may,

vat t kim loai e dan ve.


Documents

Bien Phap Thi Cong M&E