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Butterfly plate of butterfly valve and Process tools

A butterfly plate and butterfly valve technology, applied in valve devices, lift valves, positioning devices, etc., can solve the problems of leakage of the sealing surface, large opening torque, short sealing working surface, etc., and achieve small opening torque, long sealing working surface, and sealing Reliable performance

Inactive Publication Date: 2004-10-27
YONGYI VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sealing working surface between the sealing surface of the spherical butterfly plate and the valve seat is short, and it is easy to overfit under the impact of water hammer when the butterfly valve is closed or after it is closed. is the main disadvantage of this structure butterfly valve

Method used

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  • Butterfly plate of butterfly valve and Process tools
  • Butterfly plate of butterfly valve and Process tools

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Embodiment Construction

[0010] The butterfly plate of the butterfly valve of the present invention includes a butterfly plate with a conical sealing curved surface, the plane tangent curve of the conical sealing curved surface butterfly plate is circular, that is, any plane tangent curve in the radial direction of the butterfly plate is a circle, or approximately circular, Cooperate with round elastic valve seat. The cone angle of the sealing surface of the conical butterfly plate is set according to the diameter of the butterfly valve. In order to reduce the opening torque of the butterfly valve, the eccentric angle between the centerline of the conical sealing surface of the butterfly plate and the centerline of the butterfly plate should be increased as much as possible. In this embodiment Among them, the eccentric angle between the center line of the tapered sealing surface of the butterfly plate and the center line of the butterfly plate is half of the cone angle of the tapered sealing surface of...

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Abstract

A butterfly plate for butterfly valve features that the profile curve of the radial plane of said butterfly plate with conic sealing curved surface is a circle. A fixture for manufacturing said butterfly plate features that an eccentrical value absorbing unit is arranged between inclined-surface fixture and the mainshaft flange of lathe by use of the eccentrical connection between fixing axle and dovetail slide block and the mutually perpendicular dovetail slots driving structure. Its advantage is high sealing reliability.

Description

technical field [0001] The invention relates to a valve and its process device, in particular to a butterfly plate of a butterfly valve and its processing tooling. Background technique [0002] Due to its simple structure and convenient opening and closing, the butterfly valve has a wide range of applications, and its structural form is also constantly developing during use. At present, the structure of the butterfly valve has developed from a plane extrusion structure to a two-eccentric and three-eccentric structure. In the butterfly valve with triple eccentric structure, the sealing surface of the butterfly plate is a conical surface, and the eccentric angle between the centerline of the conical sealing surface and the centerline of the butterfly plate is generally about 2-4 degrees. This conical sealing surface structure is achieved by It is processed by installing an angled inclined tooling on the main shaft flange of the lathe, but the radial section ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/12F16K1/36
Inventor 赵春岳张秀林
Owner YONGYI VALVE
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