Hard sealing two-way disc valve

A hard seal and sealing surface technology, which is applied in the direction of lift valves, valve devices, engine components, etc., can solve the problems of large flow resistance, increase the production cost of butterfly plates, and unsatisfactory flow lines of butterfly plates, etc., and achieve the goal of reducing flow resistance Effect

Inactive Publication Date: 2005-04-13
陈国顺
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is an assembly gap between the butterfly plate and the valve stem and between the valve stem and the valve body, the movement of the butterfly plate to the direction away from the valve seat will cause the specific pressure of the sealing surface to drop at the upper and lower valve stems, so this kind of leakage is caused. Inevitable; second, because the butterfly plate is a steel plate, it must have sufficient thickness to make it have a certain rigidity, thus increasing the weight of the butterfly plate and increasing the production cost of the butterfly plate, and at the same time The flow line is not ideal, and the flow resistance is large

Method used

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  • Hard sealing two-way disc valve
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Embodiment Construction

[0010] see figure 1 with figure 2 The hard-sealed two-way butterfly valve provided by the present invention includes a valve body 9, a butterfly plate 5 and a valve stem 7. The right part of the inner cavity of the valve body 9 is provided with a valve seat 4, and the outer surface of the valve seat 4 is the same as the valve body. There is a moving fit gap between the inner surfaces of the body 9, the right side of the valve seat 4 is the inner step 9.1 of the valve body 9 located on the right side of the valve inner cavity, and the left side of the valve seat is provided with a compression spring that presses it to the right 2. The valve seat 4 is provided with a cone-shaped inner hole. The butterfly plate 5 is located in the valve body 9 (in the inner cavity of the valve body 9), and is fixedly installed on the valve stem 7. The butterfly plate The outer surface of 5 is provided with a sealing surface, which matches the sealing surface on the inner conical surface of the ...

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Abstract

The present invention relates to one kind of hard sealed bi-directional butterfly valve. The valve has clearance fitted valve seat with conic inner hole, inner step and compression spring in the inner cavity; and butterfly plates on the valve rod inside the valve body with outer sealing surface fitting the conic inner surface of the valve seat to form sealing pair. The butterfly plates may be closed hollow structure including the left plate with curved outer surface, inside reinforcing ribs for connection with the left plate and right planar plate. The upper part of the valve body may have drive mechanism with hand wheel for the operation of opening and closing the valve. The present invention has bi-directional sealing, small flow resistance, high sealing performance, long service life, simple structure and other advantages, and may be used widely in various medium conveying pipelines.

Description

technical field [0001] The invention relates to a valve, in particular to a two-way butterfly valve sealed by a hard seal, which is suitable for the flow of various media in any direction. Background technique [0002] The existing hard-sealed butterfly valves are generally unidirectional and only suitable for medium flow in a single direction. They are mainly composed of a valve body, a butterfly plate and a valve stem. The inner cavity of the valve body is a medium passage, and the two ends of the valve body are respectively provided with flanges perpendicular to the centerline of the inner cavity of the valve body for connecting pipes, and the upper and lower parts of the valve body are respectively provided with upper flanges located at the outer ends of the upper and lower valve stem holes. Flange or lower flange, the butterfly plate is a flat plate, located in the valve body and fixedly installed on the valve stem, the connection between the butterfly plate and the val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22
Inventor 陈国顺李炎生
Owner 陈国顺
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