Kev Taw Qhia Rau Flange Bolts, Lawv Txoj Kev Fastening Thiab Yuav Tsum Tau

I. Dab tsi yog aFlange Bolt?

Lub flange ntsia liaj qhov rooj feem ntau yog tsim los ntawm peb qhov chaw: lub taub hau hexagonal, lub flange (lub gasket ruaj ruaj nrog lub hexagon hauv qab lub taub hau hexagonal), thiab lub hau ntswj (lub tog raj kheej nrog cov xov sab nraud). Nws yog ib hom fastener uas yuav tsum tau siv nrog ib tug txiv ntseej kom fasten thiab txuas ob feem nrog los ntawm lub qhov.

Daim ntawv txuas no hu ua bolt txuas. Yog hais tias lub txiv ntseej yog unscrewed los ntawm lub ntsia liaj qhov rooj, ob qhov chaw yuav tsum tau sib cais, yog li ntawd bolt kev twb kev txuas yog ib tug detachable kev twb kev txuas.

Flange bolts yog cov fasteners, dav siv nyob rau hauv txoj kev loj thiab railway choj, industrial thiab pej xeem vaj tse, cranes, excavators thiab lwm yam hnyav machinery teb, nrog ib tug dav dav ntawm daim ntawv thov.

II. Kev faib tawm ntawm Flange Bolts

1. Hexagonal flange hom: Muaj ob hom hexagonal taub hau, ib qho yog flat-headed thiab lwm yam yog concave-headed.

2. Nto xim qeb: Raws li kev siv sib txawv, kev kho saum npoo muaj xws li dawb zinc plating, tub rog ntsuab, xim daj, thiab kev kho Dacromet uas tsis muaj xeb.

3. Flange qeb: Raws li qhov sib txawv daim ntawv thov scenarios ntawm flange bolts, qhov luaj li cas ntawm cov flange yog txawv, thiab nws muab faib ua ca hauv qab thiab toothed hom. Lub toothed flange tuaj yeem ua lub luag haujlwm tiv thaiv kev nplua.

4. Raws li txoj kev sib txuas quab yuam hom: muab faib ua hom zoo tib yam thiab hom hom qhov remed. Lub flange ntsia liaj qhov rooj rau remed lub qhov yuav tsum tau raug txuam nrog qhov loj ntawm lub qhov, thiab yog haum rau tej lub sij hawm bearing transverse quab yuam. Tsis tas li ntawd, txhawm rau ua kom tau raws li qhov xav tau ntawm kev kaw haujlwm tom qab kev teeb tsa, qee qhov flange bolts tau muab nrog lub qhov ntawm tus pas nrig, uas tuaj yeem tiv thaiv cov bolts los ntawm loosening thaum raug kev co; lub unthreaded polished pas nrig ib feem ntawm ib co flange bolts yog ua nyias, uas yog hu ua nyias pas nrig flange bolt. Hom bolt no yog qhov tsim nyog rau kev sib txuas ntawm cov kabmob sib txawv. Covmuaj zog flange boltstshwj xeeb tshaj yog siv rau cov qauv steel muaj lub taub hau loj dua thiab sib hloov kho hauv qhov loj tag nrho.

III. Cov khoom siv ntawm Flange Bolts

1. High carbon steel (C%>0.45%): Tam sim no, nws tsis yog siv los tsim cov hexagonal flange bolts hauv khw.

2. Nruab nrab carbon steel (0.25%

3. Cov pa roj carbon tsawg (C% Tsawg dua lossis sib npaug li 0.25%): Hauv tsev, feem ntau yog hu ua A3 steel, thiab cov qib siv txawv teb chaws feem ntau yog 1008, 1015, 1018, 1022, thiab lwm yam. Nws yog siv rau kev tsim cov 4.8 qib bolts, 4 cov khoom me me, tsis muaj qhov yuav tsum tau ua. (Faj seeb: Laum tus ntsia hlau feem ntau yog siv 1022 khoom.)

4. Alloy steel: Alloying cov ntsiab lus tau ntxiv rau cov pa roj carbon monoxide los txhim kho cov khoom tshwj xeeb ntawm cov hlau. Cov qib siv feem ntau suav nrog 35CrMo, 40CrMo, SCM435, 10B38, thiab lwm yam. Hexagonal flange bolts feem ntau siv SCM435 chromium-molybdenum alloy steel, uas nws cov khoom tseem ceeb suav nrog carbon (C), silicon (Si), manganese (Mn), phosphorus (P), molybdenum (P), sulfur (P).

IV. Flange Bolt Fastening Txoj Kev thiab Yuav Tsum Tau

(I) Torque-free box wrench los yog rauj ciaj ntswj

Nws yog tsim rau fastening ntawm cov khoom siv dav dav thiab cov kav dej flanges, thiab yuav tsum tau xaiv raws li qhov loj me thiab flange siab theem. Cov kev cai fastening yog raws li nram no:

1. Lub tsev kho mob yuav tsum tsim cov phiaj xwm fastening, suav cov flanges nyob rau hauv lub fastening sequence raws li symmetry hauv paus ntsiab lus, nrog rau cov zauv txoj kev nyob rau hauv daim duab 1 thiab daim duab 2.

2. Ntawm txoj haujlwm 1, 2, 3, thiab 4, siv 4 bolts los tso lub gasket los xyuas kom meej tias qhov chaw nruab nrab ntawm cov kauv qhov txhab gasket nyob rau ntawm ntug ntawm flange.

3. Tighten lub positioning bolts, ces ntxig rau lwm yam stud bolts thiab ceev kom lub load sib npaug, xyuas kom meej tias tsawg kawg yog 2 threads raug rau txhua kawg ntawm cov txiv ntoo.

4. Raws li cov khoom siv ntawm qhov chaw thiab flange, nrog rau ib lub voj voog nruj raws li ib zaug, tsim nyog tsim tus naj npawb ntawm lub sij hawm nruj (tsawg kawg 3 zaug) thiab cov hammering load (force) rau txhua qhov nruj; Kev nruj nreem hammering load yuav tsum tau nce nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50%, 80%, 100%), thiab lub load yuav tsum tsis txhob loaded ceev los yog loj heev kom tsis txhob gasket foob tsis ua hauj lwm.

5. Qhov sib lawv liag ntawm txhua qhov nruj nrog lub torque-free box wrench los yog rauj ciaj ntswj:

ib. Tighten ob radially opposite bolts rau qhov teev hammering load (force);

b. Tighten lwm khub ntawm bolts txog 90 degrees nyob ib ncig ntawm lub voj voog ntawm ob lub bolts dhau los;

c. Txuas ntxiv kom nruj kom txog thaum tag nrho cov bolts ncav cuag qhov teev hammering load.

6. Thaum kawg, nruj tag nrho cov bolts nyob rau hauv lem clockwise los yog counterclockwise raws li 100% hammering load (force).

(II) Torque wrench

Nws yog tsim rau fastening ntawm cov khoom tseem ceeb thiab cov kav dej flanges xws li kub, kub siab, flammable thiab tawg. Cov kev cai fastening yog raws li nram no:

1. Lub tsev kho mob yuav tsum tsim ib txoj kev npaj fastening, txiav txim siab qhov tsim nyog nruj torque, thiab ua kev tshuaj xyuas raws li qhov tsis xws li lub zog ntawm lub zog, pib sealing tshwj xeeb siab thiab ua hauj lwm sealing tshwj xeeb siab ntawm lub gasket, thiab nruab nrab siab, los tiv thaiv bolt tawg thiab gasket poob ntawm elasticity vim lub zog nias ntau dhau ua rau lub foob tsis ua hauj lwm.

2. Number flanges nyob rau hauv lub fastening ib theem zuj zus raws li symmetry txoj cai.

3. Ntawm txoj haujlwm 1, 2, 3, thiab 4, siv 4 bolts los tso lub gasket los xyuas kom meej tias qhov chaw nruab nrab ntawm cov kauv qhov txhab gasket nyob rau ntawm ntug ntawm flange.

4. Tighten lub positioning bolts, ces ntxig rau lwm yamstud bolts thiab ceev lawv kom lub load sib npaug, kom ntseeg tau tias tsawg kawg 2 threads raug nthuav tawm ntawm txhua qhov kawg ntawm cov txiv ntoo.

5. Raws li cov khoom siv ntawm qhov chaw thiab flange, nrog rau ib lub voj voog nruj raws li ib zaug, tsim nyog tsim tus naj npawb ntawm lub sijhawm nruj (tsawg kawg 3 zaug) thiab lub zog rau txhua qhov nruj; Lub torque yuav tsum tau nce nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50%, 80%, 100%), thiab lub load yuav tsum tsis txhob yuav loaded sai heev los yog loj heev kom tsis txhob gasket foob tsis ua hauj lwm.

6. Qhov sib lawv liag ntawm txhua qhov zawm nrog lub torque ciaj ntswj:

ib. Tighten ob radially opposite bolts rau lub torque teev;

b. Tighten lwm khub ntawm bolts txog 90 degrees nyob ib ncig ntawm lub voj voog ntawm ob lub bolts dhau los;

c. Txuas ntxiv kom nruj kom txog thaum tag nrho cov bolts ncav cuag lub zog torque.

7. Thaum kawg, nruj tag nrho cov bolts nyob rau hauv tig clockwise los yog counterclockwise raws li 100% torque tus nqi.

8. Sau tus nqi torque txhua lub sijhawm rau kev siv hauv kev saib xyuas tom ntej.

(III) Bolt tensioner

Nws yog tsim rau fastening ntawm cov khoom tseem ceeb thiab cov kav dej flanges xws li kub, kub siab, flammable thiab tawg. Cov kev cai fastening yog raws li nram no:

1. Lub tsev kho mob yuav tsum tsim ib txoj kev npaj fastening, txiav txim siab qhov tsim nyog tensile quab yuam, thiab tsim kev tshuaj xyuas raws li qhov tsis xws li lub zog lub zog, pib sealing tshwj xeeb siab thiab ua hauj lwm sealing tshwj xeeb siab ntawm lub gasket, thiab nruab nrab siab, los tiv thaiv bolt tawg thiab gasket poob ntawm elasticity vim lub zog nias ntau dhau ua rau lub foob tsis ua hauj lwm.

Thaum siv lub bolt tensioner rau stretch thiab fasten bolts ib tus zuj zus (ib kauj ruam los ntawm kauj ruam), nws yuav tsum ua raws li lub hauv paus ntsiab lus ntawm uniform bolt fastening thiab xa mus rau lub fastening sequence ntawm lub torque wrench rau stretching thiab fastening.

Thaum lub sij hawm stretching thiab fastening txheej txheem ntawm lub ntsia liaj qhov rooj tensioner, nws yog tsim nyog los tsim ib tug tsim nyog tus naj npawb ntawm stretching thiab fastening lub sij hawm, thiab lub siab yuav tsum tau nce nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50%, 80%, 100%) kom ua tau zoo ib yam; txhua lub sij hawm lub siab nce mus rau ib theem, nws yog ib qho tsim nyog yuav tsum ua kom lub siab ruaj khov ua ntej txuas ntxiv kom lub siab, kom tsis txhob muaj kev cuam tshuam ntau dhau los cuam tshuam rau cov nyhuv ua ntej zawm ntawm lub ntsia liaj qhov rooj.

4. Sau tus nqi siab txhua lub sijhawm rau kev siv hauv kev saib xyuas tom ntej.