Stop valve with valve seat provided with protective sleeve

A technology of sheath pipe and stop valve, which is applied in the structural field of stop valve, can solve the problems affecting the tightness of closing, the defect of the sealing surface of the valve seat, etc., and achieve the effect of prolonging the service life

Inactive Publication Date: 2012-07-18
宣伯民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a globe valve with a sheath tube on the valve seat, which overcomes the defect that the sealing surface of the valve seat of the current globe valve is easily washed by fluid and affects the tightness of closing

Method used

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  • Stop valve with valve seat provided with protective sleeve
  • Stop valve with valve seat provided with protective sleeve
  • Stop valve with valve seat provided with protective sleeve

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0012] Because the added parts of the present invention will work under the situation of being immersed in fluid together with parts such as valve plate 3, so its performances such as temperature resistance, corrosion resistance and rigidity should be suitable for. The connection between the fixed sleeve 7 and the inner ring of the valve seat 2 can be realized by welding or bonding, and must be firm and reliable. The connection of the spring 5, the elastic rod 6 and the valve body should be screwed, because the sheath pipe 4, the spring 5 and the elastic rod 6 are easily damaged and can be easily replaced. according to figure 1 and figure 2 As shown, when the valve plate 3 is opened, the sheath tube 4 rises under the support of the spring 5 or the elastic rod 6 to block the sealing surface of the valve seat 2, and the fluid bypasses the valv...

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Abstract

The invention discloses a stop valve with a valve seat provided with a protective sleeve, belonging to the technical field of the structure of the stop valve and aiming to solve the problems of the influence on the closing tightness due to the fact that the sealing surface of the valve seat of existing stop valve is easy to have defect in the scouring of fluid. The stop valve comprises a valve body, a valve seat and a valve plate. A protective sleeve is arranged on the inner ring of the valve seat; the lower end of the protective sleeve is connected with an elastic bearing mechanism. The protective sleeve moves upwards when the valve plate is opened, the upper end face of the protective sleeve is higher than the sealing surface of the valve seat; the upper end face of the protective sleeve clings to the lower surface of the valve plate to move downwards together with the valve plate when the valve plate is closed. The stop valve with the valve seat provided with the protective sleeve is applied to the stop valve with a planar valve plate.

Description

technical field [0001] The invention relates to a structure technology of a shut-off valve, in particular to a shut-off valve whose valve seat is provided with a sheath tube. Background technique [0002] Due to the good sealing performance of the stop valve, it can be used in the occasion of precise flow control; when it is opened, the valve plate is pushed by the fluid pressure, and can be operated quickly and easily; therefore, it is widely used in steam, compressed air, natural gas, refrigeration, It can also be used on gas pipelines such as vacuum and vacuum, and can also be used on liquid pipelines such as oil transportation and water transportation. From the perspective of the internal structure of the stop valve, when the valve is opened and used, most of the sealing surface of the valve seat will be washed by the fluid medium, and the part where the fluid flows through the sealing surface of the valve seat is exactly where the fluid flows. Where there is a drastic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/42F16K1/32
Inventor 宣伯民
Owner 宣伯民
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