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Self-seal hard dual-valve seat of balance-type valve core

A self-sealing, double-valve-seat technology, used in lift valves, valve devices, engine components, etc., can solve the problems of shortened life of the regulating valve, large output force, and wear of the sealing surface, so as to reduce the output force and wear, reduce The friction area, the effect of eliminating the influence

Inactive Publication Date: 2012-03-14
SHANGHAI WENTE FLUID CONTROL VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing balanced control valve achieves the sealing effect through compression, the output force will be too large in the actual use process, and the sealing surface will be severely worn, and leakage will occur after long-term use, resulting in shortened service life of the control valve.
The double-seat spool in the existing balanced regulating valve belongs to the over-positioning form, which requires relatively high processing and installation, and it is difficult to achieve a good sealing effect

Method used

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  • Self-seal hard dual-valve seat of balance-type valve core
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  • Self-seal hard dual-valve seat of balance-type valve core

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Embodiment Construction

[0009] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0010] Such as figure 1 As shown, the self-sealing hard double valve seat of the balanced valve core of the present invention includes a valve cage 4, an adjustment sleeve 5, a sealing ring 6 and a valve core 9, and the sealing ring 6 is arranged between the positioning steps of the valve cage 4 and the adjustment sleeve 5 , the sealing ring 6 adopts a U-shaped structure, and the sealing ring 6 is an elastic sealing ring. The inner diameter part of the sealing ring 6 contacts and seals with the valve core 9 , and the outer diameter part of the sealing ring 6 contacts and seals with the positioning step of the adjusting sleeve 5 .

[0011] Such as figure 2 As shown, during use, the medium inlet pressure is PA, and the medium outlet pressure is PB. When the valve core is closed, the upper end pressure of th...

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Abstract

The invention discloses a self-seal hard dual-valve seat of a balance-type valve core. The self-seal hard dual-valve seat comprises a valve cage, a regulating sleeve, a seal ring and the valve core; the seal ring is arranged between the valve cage and positioning steps of the regulation sleeve; and the inner diameter part of the sear ring and the valve core are in contact seal. According to the invention, the seal effect is realized through the deformation of the seal ring through the pressure difference of media at two sides of the seal ring.

Description

technical field [0001] The invention relates to a self-sealing hard double valve seat, in particular to a self-sealing hard double valve seat of a balanced valve core. Background technique [0002] Control valves are used in systems under severe working conditions, mainly in thermal power plants, nuclear power plants, heating systems and other high temperature, high pressure water and steam systems and other industries. Existing regulating valves are composed of valve body components, actuators, positioners and the like. The sealing element in the existing balanced control valve achieves the sealing effect by giving a relatively large axial preload compression. Because the existing balanced control valve achieves the sealing effect by pressing, the output force will be too large in the actual use process, and the sealing surface will be severely worn, and leakage will occur after long-term use, resulting in shortened service life of the control valve. The double-seat spool...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/46
Inventor 蔡克坚王锋廖建民陈大军许怀茗
Owner SHANGHAI WENTE FLUID CONTROL VALVE CO LTD
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