Lub neej kev pab cuam ntawm siab -zoo cross- txuas cables feem ntau mus txog 30 xyoo. Txawm li cas los xij, cov teeb meem uas muaj nyob rau hauv cross-txuas cov ntaub ntawv, cov khoom siv thiab cov txheej txheem thev naus laus zis hauv kuv lub teb chaws ua rau nws nyuaj rau kev ua tiav cov kev xav tau tsim. Cov hauv qab no yog cov ntsiab lus uas cov kws tshaj lij kev tsim khoom tsis xyuam xim rau, txhawm rau txhim kho cov chaw tsim khoom hauv cov txheej txheem tsim khoom:
1. conductor qauv
Lub compression coefficient ntawm tus neeg xyuas pib yog qhov tseem ceeb hauv kev txiav txim siab qhov zoo ntawm tus ntoo khaub lig{{0}} txuas cable. Cov tub ntxhais compression tuaj yeem tiv thaiv qhov sib txawv ntawm cov dej noo, thiab cov dej noo hauv cov neeg xyuas pib yog ib qho ua rau cov ntoo laus laus. Yog hais tias lub compression coefficient siab dua, qhov saum npoo ntawm tus neeg xyuas pib yuav du thiab cov ridges yuav me dua, lub thickness ntawm lub puab semiconductor txheej yuav thinner, thiab sab nraud txoj kab uas hla ntawm tus neeg xyuas pib yuav raug txo, uas yuav txuag tau lub rwb thaiv tsev cable. material thiab sheath material. Thaum lub compression coefficient ntawm tus conductor qauv mus txog 0.93 mus rau 0.94, muaj peev xwm ntawm noo noo nkag mus rau hauv lub conductor nyob rau hauv lub longitudinal kev taw qhia yog heev tiv thaiv. Txawm li cas los xij, tam sim no, qee cov tuam txhab lag luam hauv tsev tsis tswj hwm qhov sib xyaw ua ke zoo thiab ua tsis tau raws li tus qauv tsim; Txawm tias qee tus neeg tsim khoom emboss tus neeg xyuas pib txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm Yog tias tus neeg xyuas pib tsis tsim nyog, qhov nruj tsis txaus, lossis tus neeg xyuas pib tsis ua haujlwm zoo hauv fusion vuam sib koom ua ke, txheej txheej txheej ntawm tus neeg xyuas pib yog xoob thaum lub sijhawm them nyiaj -tawm txheej txheem, thiab pob ntawm txheej insulating yuav inevitably tshwm.
2. Kev ua kom huv ntawm cov khoom siv raw
Txhawm rau txhim kho qhov zoo ntawm cable thiab xyuas kom meej tias cov khoom siv insulating thiab cov ntaub thaiv npog yuav tsis nkag mus rau hauv cov plua plav thiab cov khib nyiab thaum siv, tus ntoo khaub lig- cov khoom sib txuas yuav tsum tau ua nyob rau hauv chav huv si nrog lub siab zoo, thiab nws yog qhov zoo tshaj plaws los siv txoj kev pub mis qis. Txawm li cas los xij, ntau tus neeg tsim khoom tsuas yog siv chav huv huv los ua kev kho kom zoo nkauj rau cov neeg siv khoom tuaj xyuas, uas tsis ua lub luag haujlwm hauv kev ua kom huv, ua rau impurities nkag mus rau cov khoom siv raw thiab ua rau tawg ntawm cov khoom siv cable. Nco ntsoov ua raws li cov txheej txheem ua haujlwm ntawm chav huv, kom chav huv huv tuaj yeem ntxuav cov khoom siv raw.
3. Extrusion Quality Control
In order to ensure the uniform electric field inside the cable, the surface of conductor shielding, insulation and insulation shielding is required to be smooth. If the temperature control is abnormal during the extrusion process, the material will be pre-crosslinked and raised particles will be formed on the surface of the extruded layer. These raised particles are prone to cause tip discharge during long-term operation of the cable, which in turn forms an "electrical tree" in the insulation, which eventually leads to cable breakdown. In particular, conductor shielding can easily cause quality problems because it cannot be inspected for appearance. To ensure extrusion quality, be sure to do the following:
①When disassembling the screw and the machine head, be sure to clean it thoroughly;
②Closely observe the temperature of each section of the extruder, if any abnormality occurs, adjust it immediately, and take samples to check the quality of the cross-linked core wire;
③ Shorten the continuous production time not more than 10 days;
④ Use high-efficiency and high-quality filters.
4. Tswj cov yeeb nkab kub
If the degree of cross-linking is insufficient (unqualified thermal extension), the cable will be softened and deformed, and the cable will easily break down under full load conditions; if the temperature of the cross-linking process is too high and the cooling is too fast, it will cause the fatal weakness of the cable—thermal stress cracking, causing The cable breaks down in a short time at lower voltage. During the cross-linking production process of the cable, if the temperature is too high and the production speed is too fast, the insulation center of the cable will shrink, resulting in thermal stress in the insulation.
5. Pipeline tswj siab
Nyob rau hauv cov xwm txheej uas tsis tshua muaj siab, muaj ntau ntawm micropores hauv cov rwb thaiv tsev. Cov rwb thaiv tsev micropores yuav ua rau muaj kev ntxhov siab tawg thiab oxidative degradation nyob rau hauv qhov kev txiav txim ntawm hluav taws xob teb, uas yuav ua kom puas lub rwb thaiv tsev qauv. Yog li ntawd, thaum lub cable khiav mus txog 7 mus rau 10 xyoo, qhov kev laus ntawm cov ntoo dej nce ntxiv. , yog li cov nitrogen siab ntawm cov kav dej yog khaws cia ntawm 1.0 1.2MPa.
6. Rwb thaiv tsev tiv thaiv khawb
Qhov kev puas tsuaj ntawm cov insulating shielding txheej yog sib npaug rau qhov scrapping ntawm cov tub ntxhais cable. Yog vim li cas rau kev puas tsuaj rau lub insulating shielding txheej yog raws li nram no:
① The overhang is out of control, and the cable hits the upper and lower walls in the vulcanized pipe;
② There is scorch on the outer edge of the mold sleeve;
③There are foreign objects in the pipeline;
④Bumps and scratches caused by handling and storage.
7. Kev tswj ntawm tooj liab daim kab xev shielding
Thaum muaj kev txhaum tshwm sim thaum lub sijhawm ua haujlwm, lub sawb tooj liab bears qhov kev luv luv -circuit tam sim no, yog li nws cov qauv yuav tsum du thiab kev sib txuas yuav tsum tsis txhob tawg. Qee cov tuam txhab siv cov tin welding rau tooj liab daim kab xev, uas ua rau daim kab xev tooj liab raug txiav los yog tsuas yog sib cuag me ntsis, uas ua rau kom muaj kev tiv thaiv ntawm qhov sib cuam tshuam ntawm daim kab xev tooj liab, uas ua rau lub zos overheating ntawm lub interface ntawm daim kab xev tooj liab, thiab txawm tias tsim. ntawm hluav taws xob sparks, uas hlawv lub rwb thaiv tsev cable: yog li xav tau:
① When welding, the copper strip should be spot welded;
② When the cable is bent, the copper tape should not be wrinkled;
③ The copper tape should be neither hard nor soft, and the wrapping should be neither loose nor tight;
④ The semi-finished product after wrapping should be wrapped with isolation film to prevent oxidation of copper tape.
