Soft-sealing cock valve

A cock valve and soft sealing technology, which is applied to cocks including cut-off devices, valve devices, engine components, etc., can solve problems such as difficult to meet design requirements, affect the service life of cock valves, and limit deformation, and achieve weight reduction , improve the service life, improve the quality of the effect

Inactive Publication Date: 2017-05-10
HANGZHOU ANQILA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most plug valve manufacturers use formed PTFE to press into the valve body flow channel hole. After the soft sealing material is pressed into the valve body flow channel hole, the fit will not be ideal, and the bushing is easy to loosen, causing the bushing to move. bit
PTFE itself has a certain hardness, its deformation is limited, and it is often difficult to meet the design requirements
This will seriously affect the service life of the plug valve and cause premature damage to the bushing, especially for frequent switching conditions

Method used

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Experimental program
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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0022] see Figure 1 to Figure 7 , This embodiment includes a valve body 1, a cock 2 and a bushing 3.

[0023] A flow channel hole is opened in the valve body 1, and a cock 2 is installed in the valve body 1 for opening and closing the flow channel hole.

[0024] The bushing 3 is fixed on the hole wall of the flow channel hole. There is a bushing hole in the bushing 3, and the cock 2 is pressed into the bushing hole. The cock 2 and the bushing hole have an interference fit. Through the elastic deformation of the bushing 3, the valve can be sealed when the cock 2 is closed.

[0025] The upper groove 4 and the lower groove 5 are opened in the valve body 1, the upper fixing block 6 and the lower fixing block 7 are fi...

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Abstract

The invention provides a soft-sealing cock valve which can effectively prevent a bushing from shifting. The soft-sealing cock valve comprises a valve body, a cock and the bushing; a flow channel hole is formed in the valve body, and the cock is installed in the valve body and used for opening and closing the flow channel hole; the bushing is fixed to the hole wall of the flow channel hole; a bushing hole is formed in the bushing, the cock is pressed into the bushing hole, and the cock is in interference fit with the bushing; an upper groove and a lower groove are formed in the valve body, the bushing is fixedly provided with an upper fixing block and a lower fixing block, the upper fixing block is inlaid into the upper groove to be fixed, the lower fixing block is inlaid into the lower groove to be fixed, and after the upper groove is matched with the upper fixing block and the lower groove is matched with the lower fixing block, the bushing is constrained in the axial direction of the cock; anti-rotating ribs are fixed to the hole wall of the flow channal hole, located on the two sides of the bushing and matched with the bushing and constrains the bushing in the rotating direction of the cock; the flow channel hole is a tapered hole.

Description

technical field [0001] The invention relates to a soft sealing plug valve. Background technique [0002] A plug valve is a closing member or a plunger-shaped rotary valve. By rotating 90 degrees, the channel port on the valve plug communicates with or separates from the channel port on the valve body to realize opening or closing. For example, the application number is 201310123433.1 China Patent. The current soft-sealed plug valve mainly adopts the structure of full fluorine lining. The flow channel hole of the valve body needs to be fixed with a soft sealing bush (PTFE), and the flow channel holes of the valve body are all formed by casting, which has relatively high requirements for casting. Most plug valve manufacturers use formed PTFE to press into the valve body flow channel hole. After the soft sealing material is pressed into the valve body flow channel hole, the fit will not be ideal, and the bushing is easy to loosen, causing the bushing to move. bit. PTFE itse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/08F16K5/02
CPCF16K5/08F16K5/0221
Inventor 程兴炎
Owner HANGZHOU ANQILA TECH
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