Compound sealing high-temperature flat gate valve

A compound sealing, flat gate valve technology, applied in the direction of sliding valve, valve device, engine components, etc., can solve the problems of difficult to achieve valve sealing, easy leakage, elastic attenuation, etc., and achieve the effect of reliable sealing

Pending Publication Date: 2020-06-09
CHENGDU CHENGFENG VALVE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The normal temperature slab gate valves currently used are mainly used in normal temperature fluids, using plastic valve seats, O-rings and other seals, which are difficult to adapt to high-temperature working environments; at the same time, the O-rings have been squeezed for a long time, and the elasticity has decayed, making it difficult for the valve to operate at low pressure for a long time. When the seal is tight, it is prone to low-pressure internal leakage; the plastic sealing ring is not wear-resistant, and the sealing surface is easy to be damaged and easy to leak

Method used

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  • Compound sealing high-temperature flat gate valve
  • Compound sealing high-temperature flat gate valve

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] like figure 1 , figure 2 As shown, the present invention includes a valve seat 1, a spring seat 3 is provided between the valve seat 1 and the valve body 2, the non-sealed end of the valve seat 1 runs through the spring seat 3, and a seal is provided between the non-sealed valve seat 1 and the valve body 2. Gasket 4 and sealing gasket 4 are made of high temperature resistant materials, such as asbestos, etc. Graphite packing 5 is installed on the outer periphery of valve seat 1, and the non-sealed end of valve seat 1 and spring seat 3 are adapted through a circular structure;

[0032] The sealing surface of the valve seat 1 is provided with a grease injection groove 6 along the circumferential direction. The grease injection groove 6 divides the sealing s...

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Abstract

The invention discloses a compound sealing high-temperature flat gate valve which comprises a valve seat. A spring seat is arranged between the valve seat and a valve body, and the non-sealed end of the valve seat penetrates through the spring seat. A grease injection groove is formed in the circumferential direction of the sealing surface of the valve seat, and the sealing surface is divided intoa sealing surface body A and a sealing surface body B by the grease injection groove. The grease injection groove communicates with a grease injection hole, and the grease injection hole extends outof the valve seat. A spring A is arranged between the valve seat and the valve body. A spring B is arranged between the spring seat and the valve body. Filler is arranged between the spring seat and the valve seat. The compound sealing high-temperature flat gate valve can be suitable for a high-temperature environment, be kept to be sealed at a low pressure and suitable for different pressed states.

Description

technical field [0001] The invention relates to the field of valve equipment, in particular to a compound-sealed high-temperature flat gate valve. Background technique [0002] In the prior art, the gate valve is used as a cut-off valve for a large-diameter pipeline. The opening and closing part of the gate valve is a gate, and the movement direction of the gate is perpendicular to the direction of the fluid. When the gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, Relying on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface and form a self-sealing. [0003] The normal temperature slab gate valves currently used are mainly used in normal temperature fluids, using plastic valve seats, O-rings and other seals, which are difficult to adapt to high-temperature working environments; at the same time, the O-rings have been squeezed for a long ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/20F16K3/02F16K3/36
CPCF16K3/0227F16K3/20F16K3/36
Inventor 李龙曾品其童俊汪涛全玉华赵英杰高阳王剑英
Owner CHENGDU CHENGFENG VALVE
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