Darvoza klapanining funktsiyasi

Eshik valfi, also known as knife gate valve, is a commonly used pipeline valve. Its main function is to open or close the fluid in the pipeline. The opening and closing of the gate valve is accomplished by moving the rising stem or handwheel, which makes its operation very simple. The characteristics of gate valves are good sealing, low pressure drop, simple structure, small volume, light weight, etc. They are commonly used in pipeline systems for conveying media such as clean water, sewage, oil and gas, to play a role in valve regulation and control. And the gate valve has a small opening range, so it is generally used to quickly shut off the flow of the medium.

Harakat rejimi: Eshik klapanining eshigi vana poyasi bilan to'g'ri chiziq bo'ylab harakatlanadi, shuningdek, ko'tarilgan dastani valfi sifatida ham tanilgan. Odatda, ko'taruvchi novda trapezoidal iplar mavjud bo'lib, ular aylanish harakatini valfning yuqori qismidagi gayka va valf korpusidagi yo'naltiruvchi truba orqali chiziqli harakatga aylantiradi, ya'ni ish momentini ish kuchiga aylantiradi. Vana ochilganda, eshikning ko'tarilish balandligi vana diametridan 1: 1 barobarga teng bo'lganda, suyuqlik kanali to'liq to'siqsiz, lekin ish paytida bu holatni kuzatib bo'lmaydi. Haqiqiy foydalanishda klapan novdasining tepasi marker sifatida ishlatiladi, ya'ni uni ochib bo'lmaydigan joy, uning to'liq ochiq holati. Haroratning o'zgarishi sababli qulflash hodisasini ko'rib chiqish uchun, odatda, valfni yuqori holatga ochib, keyin uni 1/2-1 burilish bilan valfni to'liq ochish pozitsiyasi sifatida teskari aylantirish orqali amalga oshiriladi. Shuning uchun valfning to'liq ochiq holati eshikning holati (ya'ni zarba) bilan belgilanadi. Ba'zilareshik klapanlaridarvoza ustidagi valf novdasi yong'oqlari o'rnatilgan bo'lishi kerak va qo'l g'ildiragi valf novdasini aylantirish uchun aylanadi va shu bilan darvozani ko'taradi. Ushbu turdagi valf aylanma shlyuzli qopqoq yoki yashirin shlyuz klapan deb ataladi.