Double soft sealing emergency cut-off valve

A soft-sealing, quick-closing valve technology, used in lift valves, valve devices, engine components, etc., can solve problems such as easy damage to the sealing surface, and achieve the effects of not easy damage, reliable operation, and easy leakage of media.

Inactive Publication Date: 2011-04-27
JIANGSU JIANGHUA VALVE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcoming that the existing quick-closing valve is easy to damage the sealing surface when it is closed instantly, the present invention provides a new type of quick-closing valve, which does not damage the sealing surface when it is closed instantly by pneumatic operation

Method used

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  • Double soft sealing emergency cut-off valve
  • Double soft sealing emergency cut-off valve

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Embodiment Construction

[0021] Such as figure 1 The double soft-seal quick-closing valve shown includes a valve body (1), a valve cover (2), a valve disc (3), a valve stem, and a hand and pneumatic operating mechanism (5) arranged on the valve cover bracket. A special-shaped groove (4) is provided at the contact surface between the bottom end surface of the valve disc (3) and the valve body. The elastic anti-corrosion material layer is filled in the groove. The elastic anti-corrosion material layer is slightly deeper than the special-shaped groove and protrudes slightly from the disc (3) The bottom end surface makes the valve disc and the valve body form a soft seal, the bottom angle of the outer circle of the special-shaped groove (4) is a right angle, and the through hole of the valve cover (2) and the valve stem (4) is provided with two different sizes The O-shaped fluorine rubber elastic sealing ring (1), the valve disc (3) is equipped with a cylindrical compression spring (8). On this basis, two ...

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PUM

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Abstract

The invention discloses a double soft sealing emergency cut-off valve aiming at the defects of the prior art. The double soft sealing emergency cut-off valve comprises a valve body, a valve cap, a valve clack, a valve rod, and a manual and pneumatic operation mechanism arranged on a support of the valve clack; a special-shaped groove is formed on the contact surface of the bottom end face of the valve clack and the valve body; and an elastic anticorrosive material layer is filled in the groove and is slightly higher than the special-shaped groove so that the soft sealing between the valve clack and the valve body is formed. The double soft sealing emergency cut-off valve is further improved in a mode that two elastic sealing rings with different sizes are arranged in a through hole formed by combining the valve cap and the valve rod, and a cylindrical compression spring is arranged on the valve clack. The double soft sealing emergency cut-off valve has the advantages that a sealing surface is not easy to damage by adopting soft sealing and the double soft sealing emergency cut-off valve is safer and more reliable.

Description

technical field [0001] The invention relates to a quick-closing valve, in particular to a quick-closing valve with less damage to the sealing surface. [0002] Background technique [0003] At present, the known quick-closing valves are generally formed by adding pneumatic or hydraulic or electric operating mechanisms to ordinary valves. Wait for a few parts. At present, the more common pneumatic quick-closing valves mostly adopt the form of hard seal, and this kind of structure of the disc and the valve body is hard-sealed. When the valve is closed instantly, the disc directly impacts the sealing surface of the valve body and easily scratches the sealing surface. The sealing surface of the valve body is very easy to damage and cause leakage when the medium or conveying medium contains particulate impurities. [0004] Aiming at some defects in the use of existing quick-closing valves, many units and individuals have proposed some new improvement schemes. For example, Lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/46
Inventor 陈善俊
Owner JIANGSU JIANGHUA VALVE IND CO LTD
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