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Gate valve

A technology for gate valves and valve bodies, which is applied to sliding valves, valve devices, engine components, etc., and can solve problems such as bruised gate valves, sealing surface angles, uneven sealing surfaces, and leakage

Active Publication Date: 2014-05-07
ZHEJIANG DUNAN INTELLIGENT CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the deviation of the sealing surface angle and the unevenness of the sealing surface occurs due to processing errors during the processing process, the sealing surface on the gate valve and the sealing surface on the valve body are forcibly squeezed during the closing process of the gate valve, and it is easy to cause collision due to forced extrusion. Injuries or small gaps cause the gate valve to leak

Method used

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Embodiment Construction

[0015] like Figures 2 to 5 Shown is a gate valve of the present invention, including a valve body 3 and a wedge gate 4, the wedge gate 4 is installed in the valve body 3 and can move between an open position and a closed position, and the wedge gate The gate 4 is provided with two gate sealing surfaces 41 , and the angle between the two gate sealing surfaces 41 is the wedge angle of the wedge gate 4 .

[0016] The valve body 3 is provided with a sealing part that cooperates with the gate sealing surface 41, and the sealing part includes the first sealing surface 31 at the bottom of the valve body 3 and the second top-down bottom of the valve body. The sealing surface 32 , the first sealing surface 31 and the second sealing surface 32 form an included angle α. Wherein, the upper parts on both sides of the first sealing surface 31 are in contact with the lower parts of the second sealing surface 32 . When the gate valve is in a closed state, the second sealing surface 32 is b...

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Abstract

The invention discloses a gate valve, which comprises a valve body and a wedged gate plate, wherein the wedged gate plate is provided with a gate plate sealing surface; the valve body is provided with a sealing part which is matched with the gate plate sealing surface; the sealing part comprises a first sealing surface at the bottom of the valve body and a second sealing surface which is arranged on the valve body from top to bottom; an included angle alpha is formed by the first sealing surface and the second sealing surface; when the gate valve is closed, the second sealing surface is attached to the gate plate sealing surface for sealing; and a sealed cavity is formed between the first sealing surface and the wedged gate plate. Compared with the prior art, the gate valve has better sealing property.

Description

technical field [0001] The invention relates to a gate valve. Background technique [0002] The gate valve is fully open for flow and fully closed for blocking in the pipeline, and the sealing performance often becomes one of the references for evaluating the quality of the gate valve. like figure 1 As shown, the angle between the two sealing surfaces 11 at the bottom of the valve body 1 of the existing gate valve is equal to the angle of the wedge angle of the wedge gate 2. When the gate valve is closed, the two sealing surfaces 21 of the wedge gate 2 and the The sealing surfaces 11 at the bottom of the valve body press and contact each other to achieve a sealing effect. However, when there is a deviation of the sealing surface angle and sealing surface unevenness due to processing errors during the processing process, the sealing surface on the gate valve and the sealing surface on the valve body are forcibly squeezed during the closing process of the gate valve, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/12F16K3/30
Inventor 叶得强万长群浅井義明
Owner ZHEJIANG DUNAN INTELLIGENT CONTROL TECH CO LTD
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