kev taw qhia
Lub siab yog ib qho ntawm cov txheej txheem tseem ceeb hauv kev tsim khoom. Yog tias lub siab tsis ua raws li qhov yuav tsum tau ua, nws yuav tsis tsuas yog cuam tshuam rau kev tsim khoom, txo cov khoom zoo, tab sis kuj ua rau muaj kev nyab xeeb loj heev. Yog li kev ntsuas siab muaj qhov tshwj xeeb hauv kev tsim khoom lag luam. Kab lus no qhia txog kev xaiv, kev teeb tsa thiab ntsuas ntsuas ntsuas siab raws li.
Ua ntej, kev xaiv ntawm lub ntsuas siab
Kev xaiv kom raug ntawm cov cuab yeej ntsuas raws li cov txheej txheem cov khoom yuav tsum yog ib qho tseem ceeb ua ntej kom ntseeg tau tias kev ua haujlwm zoo ntawm cov cuab yeej thiab kev tsim khoom zoo. Feem ntau, peb qhov yuav tsum tau ua hauv qab no yuav tsum tau txiav txim siab thaum xaiv hom twj paj nruag: (1) Xaiv raws li cov kev xav tau ntawm cov txheej txheem khoom hauv kev tsim khoom. Piv txwv li, txawm hais tias yuav tsum muaj kev sib kis ntawm cov chaw taws teeb, kaw tsis siv neeg lossis tswb; (2) Raws li lub cev thiab tshuaj lom neeg cov khoom ntawm qhov ntsuas nruab nrab. Xws li corrosiveness, kub, viscosity, degree ntawm kev kis kab mob, flammable thiab explosive zog, thiab lwm yam., seb puas yuav muab tso rau pem hauv ntej tshwj xeeb uas yuav tsum tau rau lub ntsuas ntsuas xaiv; (3) Raws li ntawm - thaj chaw ib puag ncig. Xws li qhov kub thiab txias, electromagnetic teb, kev co thiab ntawm - qhov chaw teeb tsa, thiab lwm yam, seb puas muaj cov kev cai tshwj xeeb rau hom ntsuas, thiab lwm yam.
1. Kev txiav txim siab ntawm qhov ntsuas qhov ntsuas
Txhawm rau siv cov cuab yeej tsim nyog thiab kev lag luam, qhov ntau ntawm cov cuab yeej tsis tuaj yeem loj dhau, tab sis txhawm rau kom ntseeg tau qhov ntsuas qhov tseeb, qhov tsawg kawg nkaus tus nqi ntawm qhov ntsuas qhov siab yog feem ntau tsis pub tsawg dua 1/3 ntawm tag nrho cov nplai. ntsuas. Lub caij elastic yog deformed mus tas li vim muaj kev ntxhov siab ntau dhau rau lub sijhawm ntev. Lub siab txwv ntawm lub ntsuas siab yuav tsum siab tshaj qhov siab tshaj qhov ntsuas (1/21/3 ntawm qhov ntau), thiab cov npoo yuav tsum tau tshwj tseg.
2. Kev xaiv cov cuab yeej raug
The accuracy of the instrument is determined according to the maximum measurement error allowed in the production process. It cannot be considered that the higher the accuracy of the instrument, the better. On the premise of meeting the process requirements, the instrument with lower precision, low price and durability should be selected as much as possible. Example of instrument type selection: The outlet pressure range of a compressor is 25~28MPa, and the absolute measurement error should not be greater than 1MPa. The process requires on-site observation and high and low limit alarms. Try to choose a pressure gauge correctly, and point out the model, accuracy and measurement range. The required conditions are: the measured pulsating pressure is 25~28MPa, and the absolute measurement error is less than or equal to 1MPa. Observation, high and low limit alarm. When selecting the instrument, consider that the pulsating pressure has a great influence on the life of the instrument, so the upper limit of the instrument selected is: P1=Pmax*2=28*2=56MPa. If the measurement range of the pressure gauge is 0~60MPa, then: 25MPa/60MPa>1/3, qhov tsawg kawg nkaus tus nqi ntawm qhov ntsuas siab tsis tsawg tshaj li 1/3 ntawm tag nrho cov nplai, thiab tus nqi qis qis kuj ua tau raws li qhov yuav tsum tau ua. Tsis tas li ntawd, raws li qhov yuav tsum tau ua ntawm kev ntsuas qhov yuam kev, nws tuaj yeem suav tau tias qhov yuav tsum tau ua rau qhov kev tso cai yuam kev ntawm qhov ntsuas yog: 1/60100 feem pua =1.67 feem pua, yog li qhov ntsuas qhov tseeb ntawm 1.5 tuaj yeem ua tau raws li qhov yuav tsum tau ua yuam kev.
Qhov thib 2. Kev teeb tsa lub ntsuas siab
Whether the pressure gauge is installed correctly or not directly affects the accuracy of the measurement results and the service life of the pressure gauge. The key to the installation of the pressure gauge is the selection of the pressure measuring point: (1) The pressure measuring point should be selected where the measured medium flows in a straight line. For the pipe segment, do not select it at the bend, bifurcation or dead end of the pipeline. (2) When measuring the liquid pressure, the pressure point should be perpendicular to the flow direction, the inner end face of the pressure pipe should be flush with the inner wall of the equipment, and there should be no protrusions or burrs. (3) When measuring the liquid pressure, the pressure-taking point should be at the lower part of the pipeline, so that no gas is accumulated in the pressure-guiding pipe; when measuring the gas pressure, the pressure-taking point should be above the pipe, so that no liquid is accumulated in the pressure-guiding pipe. (4) A shut-off
Qhov thib 3. Kev txheeb xyuas thiab ntsuas qhov ntsuas siab (qhov sib txawv siab) ntsuas ntsuas
Ua ntej lub ntsuas yuav siv tau, nws yuav tsum tau xyuas thiab calibrated. Cov cuab yeej siv rau lub sijhawm ntev yuav tsum tau kuaj xyuas tsis tu ncua, thiab lub voj voog yuav tsum tau txiav txim siab raws li qhov zaus ntawm kev siv thiab qib ntawm qhov tseem ceeb. Thaum lub ntsuas ntsuas muaj qhov ntev - kis tau tus mob nyob deb thiab ib qho cuab yeej thib ob, nws yuav tsum tau txheeb xyuas thiab ntsuas ua ke nrog cov ntsuas thib ob. Cov txheej txheem ntawm kev ntsuas siab ntsuas ntsuas yog: siv tus qauv ntsuas ntsuas ntsuas ntsuas ntsuas.
