Flange ntsia liaj qhov rooj feem ntau yog tsim los ntawm hexagon taub hau thiab flange phaj (lub gasket nyob rau hauv lub hexagon yog tsau nrog lub hexagon) thiab ntsia hlau (lub tog raj kheej nrog lwm cov xov), uas yuav tsum tau sib phim nrog ceev. , rau kev sib txuas ceev ntawm ob feem nrog los ntawm 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 lub bolt kev twb kev txuas yog ib tug detachable kev twb kev txuas.
Flange boltsyog ib hom fastener. Flange bolts yog dav siv nyob rau hauv txoj kev thiab railway choj, nrog rau kev lag luam thiab pej xeem vaj tse, cranes, excavators thiab lwm yam hnyav machinery. Scope ntawm daim ntawv thov yog dav heev.
Flange Bolts Classification:
1. Hexagonal flange hom: Muaj ob hom hexagonal taub hau, ib qho yog lub taub hau tiaj tus thiab lwm yam yog lub taub hau concave.
2. Nto xim qeb: Raws li kev xav tau sib txawv, qhov saum npoo muaj plating dawb, tub rog ntsuab, xim daj, thiab Dacromet uas yeej tsis xeb.
3. Flange hom: Raws li qhov chaw sib txawv uas siv flange screws, qhov loj ntawm cov discs txawv. Kuj tseem muaj cov hauv qab tiaj tus thiab cov hniav, thiab cov hniav ua si ua lub luag haujlwm tiv thaiv.
4. Raws li lub zog bearing hom ntawm kev sib txuas, muaj qhov zoo tib yam thiab hinged qhov. Cov flange screws siv rau lub qhov hinged yuav tsum phim qhov loj ntawm lub qhov thiab siv thaum tau txais kev quab yuam sab nraud. Tsis tas li ntawd, txhawm rau ua kom tau raws li qhov xav tau ntawm kev kaw haujlwm tom qab kev teeb tsa, qee cov pas nrig muaj qhov, thiab cov qhov no tuaj yeem tiv thaiv cov bolts los ntawm loosening thaum lawv vibrated. Qee cov flange bolts tsis muaj xov yuav tsum yog nyias, hu ua nyias pas nrig flange bolts. Hom flange bolts no yog qhov tsim nyog rau kev sib txuas ntawm lub zog sib txawv. Muaj tshwj xeeb high-strength bolts ntawm cov qauv steel. Lub taub hau yuav loj dua thiab qhov loj kuj yuav hloov.
Cov khoom siv rau flange bolt:
1. High carbon steel C%>0.45 feem pua. Hexagonal flange ntsia hlau cov khoom siv yog tsis siv nyob rau hauv kev ua lag luam tam sim no;
2. Nruab nrab carbon steel 0.25 feem pua hexagonal taub hau screws Nruab nrab carbon steel cov ntaub ntawv feem ntau hu ua No. 35 thiab No. 45 steel nyob rau hauv Tuam Tshoj, thiab 1035, CH38F, 1039, 40ACR thiab lwm yam txawv teb chaws. Feem ntau yog siv rau qib 8 ceev, qib 8.8 bolts thiab qib 8.8 sab hauv hexagon khoom;
3. Tsawg carbon steel C feem pua tsawg dua lossis sib npaug rau 0.25 feem pua yog feem ntau hu ua A3 steel hauv Suav teb. Lub teb chaws txawv teb chaws yog hu ua 1008, 1015, 1018, 1022 thiab lwm yam. Feem ntau yog siv rau qib 4.8 bolts thiab qib 4 ceev, me me screws thiab lwm yam khoom uas tsis tas yuav hardness. (Ceeb Toom: Drilling screws yog tsim los ntawm 1022 khoom.)
4. Alloy steel: Ntxiv cov ntsiab lus alloy rau cov pa roj carbon zoo tib yam kom muaj qee qhov tshwj xeeb ntawm cov hlau: xws li 35, 40 chromium molybdenum, SCM435, 10B38. Lub hexagonal flange bolts yog tsim los ntawm SCM435 chromium-molybdenum alloy steel, thiab cov khoom tseem ceeb yog C, Si, Mn, P, S, Cr, Mo.
Flange bolt fastening txoj kev thiab cov kev xav tau:
1. Torx ciaj ntswj lossis rauj ciaj ntswj yam tsis muaj torque:
Nws yog tsim rau cov khoom siv dav dav thiab cov kav dej flange fastening, thiab raug xaiv raws li cov ntsia hlau loj thiab flange siab theem. Cov kev cai fastening yog raws li nram no:
1) Lub tsev kho mob tsim ib txoj kev npaj fastening, fastens lub flange symmetrically, thiab cov zauv ntawm fastening sequence, xa mus rau daim duab 1 thiab daim duab 2 rau cov naj npawb.
2) Siv 4 screws los tso lub gasket ntawm txoj hauj lwm 1, 2, 3, thiab 4 los xyuas kom meej tias qhov chaw ntawm lub qhov txhab gasket nyob rau ntawm ntug ntawm lub flange.
3) Tighten lub teeb ntsia hlau los ntawm tes, tom qab ntawd ntxig rau lwm cov ntsia hlau ntsia hlau thiab nruj kom sib npaug ntawm cov khoom thauj, xyuas kom tseeb tias tsawg kawg 2 xov raug nthuav tawm ntawm txhua qhov kawg ntawm cov txiv ntoo.
4) Raws li cov khoom siv ntawm qhov chaw thiab flanges, ib puag ncig ntawm fastening yog suav tias yog ib qho kev suav, thiab lub sij hawm ntawm fastening (tsawg kawg 3 zaug) thiab rauj load (lub zog) ntawm txhua fastening yog txiav txim siab. Tighten nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50 feem pua , 80 feem pua , 100 feem pua increments), tsis txhob thauj khoom ceev los yog loj heev, tiv thaiv gasket foob tsis ua hauj lwm.
5) Qhov sib lawv liag ntawm txhua qhov nruj ntawm lub nplhaib tsis muaj lub nplhaib los yog rauj ciaj ntswj:
a. Tighten ob radially opposite screws rau lub predetermined hammering load (lub zog) ntawm cov screws;
b. Tighten lwm khub ntawm screws txog 90 degrees sib nrug los ntawm yav dhau los ob screws raws qhov ncig;
c. Txuas ntxiv kom nruj kom txog thaum tag nrho lwm cov ntsia hlau tau nruj rau qhov teev rauj load.
6) Thaum kawg, raws li 100 feem pua raug load (lub zog), nruj tag nrho cov screws clockwise los yog counterclockwise ib los ntawm ib tug.
duab 1
duab 2
2. Torque wrench:
Muaj feem xyuam rau cov khoom siv tseem ceeb thiab cov kav dej flanges xws li kub thiab kub siab, flammable thiab tawg. Cov kev cai fastening yog raws li nram no:
1) Lub tsev tu yuav tsum tau tsim ib txoj kev npaj fastening, tsim ib qho kev tsim nyog torque, thiab ua ib qho kev ntsuam xyuas raws li lub zog ntawm cov ntsia hlau, qhov pib sealing tshwj xeeb siab ntawm gasket, ua hauj lwm sealing tshwj xeeb siab, thiab nruab nrab siab los tiv thaiv cov ntsia hlau los ntawm kev tawg thiab lub gasket los ntawm compressed. Kev quab yuam ntau dhau thiab poob ntawm elasticity ua rau lub foob tsis ua haujlwm.
2) Fasten lub flange symmetrically, thiab tus naj npawb ntawm fastening sequence, xa mus rau daim duab 1 thiab daim duab 2 rau tus lej.
3) Tso lub gasket nrog 4 screws ntawm txoj hauj lwm 1, 2, 3, thiab 4 kom ntseeg tau tias qhov chaw ntawm lub qhov txhab gasket nyob rau ntawm ntug ntawm flange.
4) Tighten lub teeb screws ntawm tes, ces ntxig rau lwm cov stud screws thiab ceev kom sib npaug ntawm cov load, xyuas kom meej tias tsawg kawg yog 2 threads raug rau txhua kawg ntawm cov txiv ntoo.
5) Raws li cov khoom siv ntawm qhov chaw thiab flanges, ib lub voj voog nruj yog suav tias yog ib qho kev suav, thiab tus naj npawb ntawm cov sij hawm nruj (tsawg kawg 3 zaug) thiab txhua qhov nruj torque tau txiav txim siab, thiab lub torque nruj yog nruj nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50 feem pua , 80 feem pua , 100 feem pua increments), tsis txhob thauj khoom ceev heev los yog loj heev, tiv thaiv gasket foob tsis ua hauj lwm.
6) Qhov sib lawv liag ntawm txhua qhov nruj ntawm lub torque ciaj ntswj:
a. Tighten ob lub radially opposite screws rau qhov teev torque ntawm cov screws;
b. Tighten lwm khub ntawm screws txog 90 degrees sib nrug los ntawm yav dhau los ob screws raws qhov ncig;
c. Txuas ntxiv kom nruj kom txog thaum tag nrho lwm cov ntsia hlau tau nruj rau lub zog torque.
7) Thaum kawg, nruj tag nrho cov screws clockwise los yog counterclockwise raws li 100 feem pua torque tus nqi.
8) Sau tus nqi torque raws li kev siv rau kev saib xyuas yav tom ntej.
3. Screw tensioner: haum rau qhov kub thiab txias siab, flammable thiab explosive thiab lwm yam khoom tseem ceeb thiab pipeline flanges. Cov kev cai fastening yog raws li nram no:
1) Lub tsev kho mob tsim cov phiaj xwm fastening, tsim lub zog tensile tsim nyog, thiab ua qhov kev tshuaj xyuas tsim raws li lub zog ntsia hlau, qhov pib sealing tshwj xeeb ntawm lub gasket, kev ua haujlwm sealing tshwj xeeb siab, thiab nruab nrab siab los tiv thaiv cov ntsia hlau. los ntawm kev tawg thiab lub gasket vim lub siab. Kev nruj nruj heev thiab poob ntawm elasticity ua rau lub foob tsis ua haujlwm.
2) Thaum cov ntsia hlau tensioner stretches lub fastening screws ib tus zuj zus (ib kauj ruam los ntawm kauj ruam), raws li lub hauv paus ntsiab lus ntawm cov ntsia hlau zawm uniformity, xa mus rau lub nruj raws li lub torque ciaj ntswj mus ncab thiab zawm.
3) Thaum lub sij hawm stretching thiab fastening txheej txheem ntawm cov ntsia hlau tensioner, tus naj npawb ntawm stretching thiab fastening lub sij hawm yuav tsum tau txiav txim siab, thiab lub siab yuav tsum tau nce nyob rau hauv kev txiav txim los ntawm me me mus rau loj (xws li 50 feem pua, 80 feem pua, 100 feem pua), thiab lub siab yuav tsum sib xws. Nws yuav tsum tau nce ntxiv tom qab qhov hluav taws xob ruaj khov kom tsis txhob muaj kev cuam tshuam ntau dhau thiab cuam tshuam rau cov nyhuv pre-tightening ntawm cov ntsia hlau.
