Eccentric butterfly valve

An eccentric butterfly valve, eccentric technology, applied in the direction of lift valve, valve device, engine components, etc., can solve the problem of increased valve additional cost, achieve reasonable valve opening and closing torque, improve sealing specific pressure, and reduce wear effects.

Inactive Publication Date: 2010-09-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, in order to ensure the sealing performance after the valve is closed, the valves in the medium and low pressure medium pipelines use sealing materials with better sealing effects, adopt more complicated sealing structures, or provide larger torque to the valve stem to improve the sealing performance. To the sealing effect, the sealing element needs to be replaced regularly according to the working environment of the valve, and the driving device that provides high torque is configured, which leads to an increase in the additional cost of the valve

Method used

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Embodiment Construction

[0010] Such as figure 1 , 2 , 3, and 4, the eccentric butterfly valve includes a valve body 1, which is characterized in that it also includes: the eccentric butterfly plate 2 with a spherical sealing surface inside the valve body 1 and the corresponding spherical The valve seat 10 on the sealing surface, the eccentric butterfly plate 2 is installed on the valve stem 5 through the connecting rod 9, and the back of the eccentric butterfly plate 2 is provided with an eccentric adjustment block 3, and the eccentric adjustment block 3 moves the shaft nail 8 and the arc through the eccentric adjustment block. The connecting rods 4 are connected, and the arc-shaped connecting rods 4 are fixedly installed on the valve stem 5 through the positioning pin 6 .

[0011] The back of the eccentric butterfly plate 2 is provided with a first fixed block 2-1, a second fixed block 2-2, and a third fixed block 2-3, and the connecting rod 9 passes through the shaft nail 11 and the first fixed bl...

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Abstract

The invention discloses an eccentric butterfly valve, which comprises a valve body 1. An eccentric butterfly plate 2 with a spherical sealing surface and a valve seat 10 with a corresponding spherical sealing surface are arranged in the valve body 1; the eccentric butterfly plate 2 is arranged on a valve rod 5 through a connecting rod 9; the back of the eccentric butterfly plate 2 is provided with an eccentric adjusting block 3; the eccentric adjusting block 3 is connected with an arc connecting rod 4 through an eccentric adjusting block moving shaft pin 8; and the arc connecting rod 4 is fixedly arranged on the valve rod 5 through a positioning pin 6. The friction between the sealing surfaces is reduced, the purpose of opening and closing a valve through a small valve rod torque is fulfilled and the driving device is simplified by using a medium pressure as a main acting force for sealing the valve and adjusting the contact of the sealing surfaces by adopting the valve plate of a large eccentric connecting rod structure and a triangular eccentric adjusting block.

Description

technical field [0001] The invention relates to the technical field of valves with butterfly valve elements, in particular to an eccentric butterfly valve. Background technique [0002] In the prior art, in order to ensure the sealing performance after the valve is closed, the valves in the medium and low pressure medium pipelines use sealing materials with better sealing effects, adopt more complicated sealing structures, or provide larger torque to the valve stem to improve the sealing performance. According to the sealing effect, the sealing element needs to be replaced regularly according to the working environment of the valve, and the driving device that provides high torque is configured, which leads to an increase in the additional cost of the valve. Contents of the invention [0003] The object of the present invention is to provide an eccentric butterfly valve. [0004] The technical solution adopted by the present invention to solve the technical problem is: th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/48F16K1/32
Inventor 余龙俞树荣
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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