Xaiv Cov Ntsiab Cai ntawm Hoisting Machinery Steel

Kev xaiv cov qauv ntawm hoisting machinery steel

Tom qab kawm about choj cranes, gantry cranes, jib cranes thiab lwm yam khoom, qee cov phooj ywg yuav tsum muaj kev tsis ntseeg txog kev xaiv cov hlau. Puas yog cov hlau ntau lawm ntawm crane txhua yam nyob hauv specification? Puas muaj qhov sib txawv ntawm kev xaiv steel hauv ntau qhov chaw ua haujlwm?

Qhov tseeb, kev xaiv cov hlau yog ua raws li qhov tseeb ntawm cov hlau ntau lawm hauv kuv lub teb chaws, ua ke nrog cov yam ntxwv ntawm kev ua haujlwm ntawm cov qauv crane, ntawm qhov chaw ua kom muaj kev ruaj ntseg thiab kev ntseeg siab ntawm cov qauv, tag nrho xav txog kev lag luam ntawm cov khoom siv thiab cov yam ntxwv ntawm domestic steel, los txiav txim cov hlau.

Tshwj xeeb, cov qauv kev xaiv yog raws li nram no:

1. Qhov tseem ceeb ntawm cov qauv

Raws li hom hlau qauv, feem ntau lub teeb-lub luag hauj lwm truss qauv feem ntau siv steel dov los ntawm carbon structural steel, thiab qhov tsawg kawg nkaus lub kaum sab xis steel yuav tsum tsis txhob tsawg tshaj li 45m x 45m x 5m;

Cov hlau tsis tshua muaj hlau yuav raug txiav txim siab rau cov khoom siv hnyav hnyav. Lub phaj girder qauv yog feem ntau yog ua los ntawm dov carbon structural steel. Lub thickness ntawm steel phaj yuav tsum tsis txhob tsawg tshaj li 6 hli. Yog tias muaj txheej tshwj xeeb los tiv thaiv corrosion, nws yuav tsis tsawg dua 5 hli.

Rau cov hom phiaj tshwj xeeb crane cov qauv, yog tias lub thickness yuav tsum raug txo vim qhov hnyav txwv thiab cov qauv kev cai, cov txheej txheem vuam kuj tseem raug txiav txim siab tsis pub tsawg dua 4 hli.

2. load yam ntxwv

Kev thauj khoom ntawm cov qauv steel ntawm hoisting machinery tuaj yeem yog: zoo li qub lossis dynamic, feem ntau ua yeeb yam, qee zaum ua yeeb yam lossis qee zaus tshwm sim (xws li av qeeg), feem ntau tag nrho loaded los yog tsis tshua muaj loaded, thiab lwm yam.

Cov ntaub ntawv hlau tsim nyog yuav tsum raug xaiv raws li cov lus hais saum toj no ntawm cov khoom thauj khoom, thiab qhov tsim nyog yuav tsum tau ua raws li qhov tsim nyog yuav tsum tau ua. Rau cov tswv cuab ntawm cov qauv ncaj qha coj cov dynamic loads, steel cov ntaub ntawv uas zoo dua thiab toughness yuav tsum tau xaiv:

General-zoo hlau tuaj yeem siv rau cov tswv cuab ntawm cov khoom siv hluav taws xob zoo li qub lossis tsis ncaj qha dynamic loads.

Rau cov qauv bearing dynamic load los yog cov qauv nrog ib tug ntau dua ntawm kev khiav hauj lwm, cov hlau tua yuav tsum tau siv, thiab cov aluminium alloy yuav tsum tsis txhob siv.

3. txoj kev sib txuas

Cov txheej txheem steel sib txuas yuav yog welded lossis tsis-welded (bolts lossis rivets).

Rau cov qauv welded, tsis sib xws cua sov thiab txias thaum lub sij hawm vuam feem ntau ua rau siab vuam residual kev nyuaj siab nyob rau hauv lub Cheebtsam;

Vuam qauv thiab tsis tuaj yeem welding tsis xws luag feem ntau ua rau tawg zoo li kev puas tsuaj rau cov qauv;

Zuag qhia tag nrho txuas ntxiv thiab rigidity ntawm cov qauv welded ua rau nws yooj yim dua rau qhov tsis xws luag lossis tawg kom nkag mus rau ib leeg;

Tsis tas li ntawd, cov ntsiab lus carbon thiab sulfur ntau dhau yuav cuam tshuam rau cov weldability ntawm hlau.

Yog li ntawd, qhov yuav tsum tau ua ntawm welded structural steel yuav tsum siab tshaj qhov uas tsis yog-welded structural steel nyob rau hauv tib lub teeb meem, cov ntsiab lus ntawm cov teeb meem xws li carbon, sulfur, phosphorus yuav tsum qis dua, thiab cov yas thiab toughness yuav tsum zoo dua.

Rau cov qauv uas tsis yog-welded, cov kev xav tau saum toj no tuaj yeem ua kom haum rau kev sib piv.

4. Qhov chaw ua haujlwm kub ntawm cov qauv

Lub plasticity thiab toughness ntawm steel txo nrog txo qhov kub thiab txias. Nyob rau hauv qhov kub thiab txias, tshwj xeeb tshaj yog nyob rau hauv lub brittle hloov kub cheeb tsam, lub toughness txo sharply, thiab brittle puas yog feem ntau tshwm sim.

Yog li ntawd, rau cov qauv steel uas feem ntau ua haujlwm lossis ua haujlwm ntawm qhov kub tsis zoo, tshwj xeeb tshaj yog cov qauv welded, steels nrog cov tshuaj zoo dua qub thiab cov khoom siv kho tshuab thiab cov kev hloov pauv kub uas qis dua qhov chaw ua haujlwm kub ntawm cov qauv yuav tsum raug xaiv.

5. Hlau thickness

Vim tias qhov sib piv me me thaum lub sij hawm dov, cov hlau nrog cov tuab loj muaj lub zog tsis zoo, cuam tshuam rau qhov hnyav thiab vuam kev ua tau zoo, thiab nws yooj yim los tsim kev ntxhov siab.

Yog li ntawd, welded lug nrog loj tivthaiv thickness yuav tsum tau siv zoo zoo hlau.

6. Tsim nyog lav ntawm kev cuam tshuam toughness ntawm chav tsev kub

Rau steels ntawm welded lug uas yuav tsum tau xam kev qaug zog, lawv yuav tsum muaj ib tug tsim nyog lav rau tej yam toughness ntawm chav tsev kub.

Thaum ua haujlwm kub ntawm cov qauv tsis siab tshaj {{0}} degree tab sis siab dua - 20 degree, Q235 steel thiab Q345 steel yuav tsum muaj qhov tsim nyog lav ntawm 0 degree cuam tshuam toughness;

Rau Q390 steel thiab Q420 steel, yuav tsum muaj kev lees paub tsim nyog rau kev cuam tshuam toughness ntawm -20 degree ;

Thaum ua haujlwm kub ntawm cov qauv tsis siab tshaj - 20 degree, Q235 steel thiab Q345 steel yuav tsum muaj qhov tsim nyog lav ntawm - 20 degree cuam tshuam toughness;

Rau Q390 steel thiab Q420 steel, nws yuav tsum muaj qhov tsim nyog lav ntawm - 40 degree cuam tshuam toughness.