SU932065A1

SU932065A1 - Shut-off valve

Info

Publication number: SU932065A1
Application number: SU792719690A
Authority: SU
Inventors: Владимир Иванович Жулин; Валентин Львович Хмельникер; Евгений Георгиевич Васильченко; Виктор Иванович Скворцов
Priority date: 1979-01-31
Filing date: 1979-01-31
Publication date: 1982-05-30

Description

(5) ЗАПОРНЫЙ КЛАПАН(5) CHECK VALVE

II

Изобретение относитс к энергетическому машиностроению, более конкретно к запорной арматуре и может быть использовано в теплоэнергетике, нефтехимии и газовой промышленности.The invention relates to power engineering, more specifically to valves and can be used in heat and power, petrochemical and gas industries.

Известно устройство, в полости корпуса которого размещены разгрузочный затвор и основной запорный орган, соединенный со штоком привода, плавающие седла, установленные в корпусе с зазором, св занным с входным патрубком , сообщенным системой перепуска с полостью корпуса L Недостаток известной конструкциимала надежность в результате отсутстви разгрузки седла от контактных усилий.A device is known in which a discharge valve and a main locking member connected to a drive rod, floating seats mounted in a housing with a gap connected to an inlet pipe communicated by a bypass system with a housing cavity are placed in the cavity of the housing. L The lack of known construction is the reliability due to the absence of unloading. saddles from contact force.

Цель изобретени - повышение надежности .The purpose of the invention is to increase reliability.

Указанна цель достигаетс тем, что на запорном органе выполнен паз, в котором установлена подвижна в осевом направлении гайка, а на штоке резьба, взаимодействующа с гайкой.This goal is achieved by the fact that the locking body has a groove in which a nut is mounted in the axial direction and a thread interacting with the nut on the stem.

На фиг. 1 представлен запорный клапан, общий вид; на фиг. 2 - разрез А-А на фиг. 1.FIG. 1 shows the shut-off valve, a general view; in fig. 2 shows section A-A in FIG. one.

Запорный клапан содержит корпус 1, входной 2 и выходной 3 патрубки, запорный орган , плавающие седла 5, установленные в корпусе 1 с зазором, которые плотно соединены с корпусом посредством мембраны 6.The shut-off valve includes a housing 1, an inlet 2 and an outlet 3 nozzles, a shut-off member, floating seats 5 installed in the housing 1 with a gap, which are tightly connected to the housing through a membrane 6.

10ten

Claims

The bypass system is a hole made in the housing opposite the membrane 6, connected to the hole in the cover 7, tube 8, and the stem E is provided with a discharge valve, and in the lower part it is equipped with a thread that interacts with the thread of the nut 10 located in the locking groove body. The hole in the bonnet for the stem has a sealing edge on which a discharge valve sits, thus creating a seal in the closed position of the valve. Thus occurs the separation of the cavity in front of the valve from the cavity behind the valve body. An arcuate groove 11 is made in the locking organ, into which the conical head of the screw clamp 12 enters. The shut-off valve operates the following small head. In the closed position of the valve, the rod 9 is in the lower position, and its discharge valve is pressed against the sealing edge of the cap. In the inner cavity of the lid 7, a pressure is created equal to the pressure in front of the closure member. Under the action of the pressure differential acting on the membrane b / a force is created on the moving seat 5. Under the action of this force, the valve in the closed position provides the specified tightness. When the valve is opened, the rod 9 moves upward by the amount of guaranteed clearance between the nut 10 and the bottom of the cover 7. The conical spindle collar detaches from the sealing edge, opening access to the working medium into the cavity behind the locking member, which causes the unloading of the locking member k from the force created by the moving seat 5- After the gap between the nut 10 and the lower part of the lid 7 is selected, with further movement of the stem upwards, the locking member turns, until it is fully opened. When closing the shut-off valve, the interaction of parts occurs in reverse order. The rod 9, lowering, turns the closure body k at an angle of 90 °, while the unloading valve made on the rod 9 fits tightly on the sealing edge of the lid 7, creating pressure on the floating seat 5 and the locking body - the stop valve is closed. Claims of Invention The check valve, in the cavity of the casing which is placed a discharge valve and the main closure body connected to the actuator stem, floating seats mounted in the casing with a clearance connected to the inlet pipe communicated by the bypass system to the casing cavity, tl and h In order to increase reliability, a groove in which the nut is mounted in the axial direction is mounted on the locking organ, and a thread interacting with the gaiSources of information is mounted on the stem and on the stem. taken into account in the examination of I 1. USSR author's credentials No. i 05220, cl. F 16 K 5/20, 197+.