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Low torsion moment ball valve for fuel gas vertical pipe

A low-torque, riser technology, applied in the field of new valve structure research, can solve the problems of poor fire resistance and sealing, large operating torque, misoperation, etc., to prolong the service life, reduce the operating torque, and prevent misoperation.

Inactive Publication Date: 2011-08-17
SUZHOU GAS EQUIP & VALVES MFG
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Problems solved by technology

[0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to propose a special ball valve for the gas riser, through the redesign of the valve body structure, to improve and solve the traditional ball valve with large operating torque, heavy weight, poor fire resistance and tightness, There are hidden problems such as leakage and easy misuse

Method used

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  • Low torsion moment ball valve for fuel gas vertical pipe
  • Low torsion moment ball valve for fuel gas vertical pipe
  • Low torsion moment ball valve for fuel gas vertical pipe

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Embodiment Construction

[0022] The present invention analyzes the structural defects of traditional ball valves and some problems commonly used in gas risers, and innovatively proposes a low-torque ball valve for gas risers, which has better sealing, fire prevention, portability and durability.

[0023] The gas riser low-torque ball valve is composed of a valve body, a protective cover, a ball, and a valve stem connected to the ball through the valve body in linkage. Such as Figure 1 to Figure 3 As shown: the valve body 1 is a cylindrical body with both ends open and connected by the thread connection of the main valve body 11 and the auxiliary valve body 12, the ball 2 is installed in the inner cavity of the valve body, and the protective cover 4 is facing the valve body. The rod 3 is connected to the valve body 1 in an openable manner; and the inner cavity of the valve is provided with a sealing ring 6 and a retaining ring 7 at the positions in contact with the ball along the through direction of ...

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Abstract

The invention discloses a low torsion moment ball valve for a fuel gas vertical pipe, which is a ball valve with novel sealing structure; a valve body is connected by a screw thread so as to reduce the weight of the valve; a sealing ring is arranged in a sealing groove on the valve body so that the sealing ring does not fall off at any state, the reliability of the valve is ensured, the torsion of the valve opening and closing is reduced, simultaneously a slotting disk spring is used for providing the pre-pressure of the valve, and a specially designed sealing ring greatly reduces an operating torsion; and after the sealing ring is burned at high temperature, the slotting disk spring pushes a sphere so that the sphere is contacted with an auxiliary valve body so as to form a metal hard seal which avoids the internal leakage of the valve and has the fire prevention function. In addition, a special designed valve opening mechanism prevents the possibility of incorrect operations.

Description

technical field [0001] The invention relates to a pipeline valve control device, in particular to a ball valve specially used for a gas riser, and belongs to the field of new valve structure research. Background technique [0002] The ball valve is evolved from the plug valve. Its opening and closing part is a sphere, which can be opened and closed by rotating the sphere 90° around the axis of the valve stem. Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of media. However, even if the sealing ring is made of rubber and other materials, the sealing performance of the traditional ball valve is still poor, and the method of changing the structure of the ball valve body itself to improve the sealing performance of the ball valve by other technical means makes the weight of the ball valve increase simultaneously. Product upgrading and marketing have caused a great negative impact. In fact, in addition to this, the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20F16K5/08F16K31/60F16K35/10
Inventor 沈伟伟张红军徐利民孔新明
Owner SUZHOU GAS EQUIP & VALVES MFG
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