Kudziwa za thermocouple ndi chitetezo valavu ya solenoid ya chitofu cha gasi

- 2021-09-08-

Kuphatikizana (mutu) wa thermocouple kumayikidwa pamoto wotentha kwambiri, ndipo mphamvu yamagetsi yamagetsi imaphatikizidwa ku koyilo la valavu yodzitetezera yomwe imayikidwa pa valavu yamagesi kudzera pamawaya awiri. Mphamvu yokoka yomwe imapangidwa ndi valavu ya solenoid imatenga zida mu valavu ya solenoid, kuti mpweyawo ufike pamphuno kudzera mu valavu yamagesi.

Ngati lawi lamoto lizimitsidwa chifukwa chazifukwa zangozi, mphamvu ya electromotive yopangidwa ndi thermocouple imasowa kapena pafupifupi kutha. Kutsekemera kwa valavu ya solenoid kumasokonekera kapena kufooketsa kwambiri, zida zimatulutsidwa pansi pa kasupe, chipika cha rabara chomwe chimayikidwa pamutu pake chimatseka dzenje la mpweya mu valve ya gasi, ndipo valavu ya mpweya imatsekedwa.

Chifukwa mphamvu yamagetsi yamagetsi yopangidwa ndi thermocouple ndiyofooka (ma millivolts ochepa chabe) ndipo pakadali pano ndi yaying'ono (mamiliyoni mamilioni okha), kuyamwa kwazitsulo zokhazokha ndizochepa. Chifukwa chake, pakangoyaka, shaft yamagetsi iyenera kukanikizidwa kuti ipereke mphamvu yakunja kwa zida motsatira njira yolumikizira, kuti zida zankhondo zizitha.

Muyezo watsopano wa dziko umanena kuti nthawi yotsegulira chitetezo cha solenoid valve ndi ≤ 15s, koma nthawi zambiri imayendetsedwa ndi opanga mkati mwa 3 ~ 5S. Nthawi yotulutsa yachitetezo cha solenoid valve ili mkati mwa 60s molingana ndi muyezo wadziko lonse, koma nthawi zambiri imayendetsedwa ndi wopanga mkati mwa 10 ~ 20s.

Palinso chida choyatsira chotchedwa "zero second start", chomwe chimagwiritsa ntchito valavu yodzitetezera yokhala ndi ma coil awiri, ndipo koyilo yomwe yangowonjezedwa kumene imagwirizanitsidwa ndi dera lochedwa. Pakayaka, dera lochedwa limapanga mpata wosungira valavu ya solenoid potsekedwa kwa masekondi angapo. Mwanjira iyi, ngakhale wosuta atangotulutsa dzanja lake, lawi silizima. Ndipo nthawi zambiri kudalira koyilo ina kuti mutetezedwe.

Kuyika kwa thermocouple ndikofunikira kwambiri, kotero kuti lawi likhoza kuphikidwa bwino pamutu wa thermocouple pakuyaka. Kupanda kutero, EMF ya thermoelectric yopangidwa ndi thermocouple sikokwanira, kuyamwa kwa koyilo yachitetezo cha solenoid valve ndi yaying'ono kwambiri, ndipo zida sizingalowe. Mtunda pakati pa mutu wa thermocouple ndi chivundikiro chamoto nthawi zambiri ndi 3 ~ 4mm.