High-temperature high-pressure self-sealing gate valve with double flat shutter board

Abstract

The invention relates to a high-temperature high-pressure self-sealing dual-plane gate valve, which comprises a valve, a valve cover, an operation screw and an operation hand wheel on the valve cover. Wherein, the valve has a gate plate connected to the operation screw, and sealing surface matched with the gate plate; said valve comprises two separate gate plates and a central pushing rod; two gate plates are opposite, whose outer sealing surfaces are parallel, and inner surfaces are uniform distributed with several compress springs; the central pushing rod via its lower end and the clamp groove at the inner sides of two gate plates is clamped between two gate plates, while the upper end via the connector is connected to the operation screw. Via the operation screw, the pushing rod via its lower end can move said two gate plates up and down along the sealing surface; and the compress spring compresses the two side sealing surfaces of gate plates on the sealing surface of valve, to confirm the sealing effect and prolong the service life.

Description

technical field [0001] The present invention relates to a valve. Background technique [0002] In industries such as chemical industry, petroleum, natural gas, power plants, coal mines, construction, sewage treatment, and light industry, the gate valves commonly used are integrated, and the gates are wedge-shaped with a large top and a small bottom, which is not only inconvenient to process, but also due to the There are often hard particles or other dirt in the liquid medium, and these dirt remain on the sealing surface of the valve body, which will scratch the sealing surface during the sealing process, make the sealing effect worse and cause internal leakage, resulting in the use of the gate The life is greatly shortened, and the normal wear and tear of the sealing surface will also cause internal leakage because it cannot be compensated. Contents of the invention [0003] In view of the above problems, the object of the present invention is to provide a high temperatu...

AI Technical Summary

Problems solved by technology

[0002] In industries such as chemical industry, petroleum, natural gas, power plants, coal mines, construction, sewage treatment, and light industry, the gate valves commonly used are integrated, and the gates are wedge-shaped with a large top and a small bottom, which is not only inconvenient to process, but also due to the There are often hard particles or other dirt in the liquid medium, and these dirt remain on the sealing surface of the valve body, which will scratch the sealing surface during the sealing process, make the sealing effect worse and cause internal leakage, resulting in the use of the gate The life is greatly shortened, and the normal wear and tear of the sealing surface will also cause internal leakage due to the inability to compensate

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