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Composite sealing bidirectional straightway ball valve with four seats

A straight-through ball valve and composite sealing technology, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as short service life, and achieve the effect of improving sealing reliability and product service life

Active Publication Date: 2014-04-09
CHENGDU CHENGGAO VALVE +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the downstream valve seat is intact, the entire valve will be scrapped immediately, and its service life is very short

Method used

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  • Composite sealing bidirectional straightway ball valve with four seats
  • Composite sealing bidirectional straightway ball valve with four seats
  • Composite sealing bidirectional straightway ball valve with four seats

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: the composite sealed four-seat two-way straight ball valve is mainly composed of a valve body 1, a side valve body 17, a ball 7, a valve stem 23, a valve seat support 3, a spring 14, and an inner valve seat 5 , Bearing seat 13, sliding bearing 12, O-ring seals 16, 28, gland 27, connection plate 24, packing 26 and so on. Wherein the outer cylindrical surfaces of the left and right two valve seat supports 3 of the ball valve are all stepped; the inner sides are all concave spherical. On the inner spherical surfaces of the left and right valve seat supports 3 and above the inner valve seat 5, an outer valve seat 6 is added. At the same time, an inner-stage sealing ring 2 and an outer-stage sealing ring 4 are respectively arranged on the outer cylindrical surfaces of the left and right valve seat supports 3 . And the diameter of the cylindrical surface used ...

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PUM

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Abstract

The invention relates to a composite sealing bidirectional straightway ball valve with four seats, belonging to the improvement of a ball valve structure. The straightway ball valve provided by the invention is suitable for pipelines of high sealing property requirements, poor working medium conditions and long service life requirements. The ball valve provided by the invention is characterized in that a four-valve-seat sealing structure comprising a group of inner valve seats and a group of outer valve seats is arranged on the valve seats. The ball valve provided by the invention has the sealing effect and service life of four general ball valves, thus, the ball valve has the characteristics of good sealing reliability and durability.

Description

Technical field [0001] The invention relates to general mechanical valve technology and belongs to the improvement of ball valve structure. It is suitable for pipelines with high sealing performance requirements, poor working medium conditions and long service life. Background technique [0002] The cut-off ball valves installed before and after the existing natural gas pipeline receiving and sending barrels are usually ordinary pipeline ball valves. The structure of this ball valve is to set a valve seat at the upstream end and downstream end of the valve; the ball is a fixed ball type; the seat and the seat support are attached to the ball under the thrust of the spring, and the seal is realized under the action of the medium pressure. That is, only one upstream valve seat can achieve sealing, and once the valve seat is damaged by particulate impurities in the medium, the sealing will fail. Even if the downstream valve seat is intact, the entire valve will be scrapped im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/20
Inventor 曾品其谢贻林曾和友胡建
Owner CHENGDU CHENGGAO VALVE