A two-way sealing valve seat suitable for multi-temperature working conditions
A two-way sealing, multi-temperature technology, used in valve devices, sliding valves, cocks including cut-off devices, etc., can solve the problems of floating valve seat and valve body seal leakage, achieve good sealing performance, improve application range and reliability Effect
Active Publication Date: 2018-10-09
SHANGHAI VALVE FACTORY
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a bidirectional sealing valve seat suitable for multi-temperature working conditions, and solve the problem of sealing leakage between the floating valve seat and the valve body in the low temperature and high temperature working conditions of the valve
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[0027] In order to better understand the technical solution of the present invention, it will be described in detail below through specific embodiments in conjunction with the accompanying drawings:
[0028] see Figure 3 to Figure 6 , a bi-directional sealing valve seat suitable for multi-temperature working conditions of the present invention includes a valve seat 600 and a sealing ring retainer assembly 100 .
[0029] The seal ring holder assembly 100 is disposed radially outside of the valve body 600 .
[0030] The seal ring cage assembly 100 includes a pressure balanced cage 110, graphite seal ring group A 120, graphite seal ring group B 130, metal seal cage A 140, metal seal cage B 150, metal seal group A 160 and metal seal set B 170.
[0031] The cross-section of the pressure-balanced cage 110 is cross-shaped.
[0032] A graphite sealing ring group A 120 and a graphite sealing ring group B 130 are arranged on both sides of the pressure balanced cage 110 .
[0033] G...
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The invention discloses a bidirectional seal valve seat suitable for multiple temperatures and working conditions. The bidirectional seal valve seat suitable for multiple temperatures and working conditions comprises a valve seat and a sealing ring cage assembly. The sealing ring cage assembly is arranged on the outer side of the valve seat in the radial direction; and the sealing ring cage assembly comprises a pressure balanced type cage, a graphite sealing ring group I, a graphite sealing ring group II, a metal sealing piece cage I, a metal sealing piece cage II, a metal sealing piece group I and a metal sealing piece group II. The graphite sealing ring group I and the graphite sealing ring group II are arranged on the two side of the pressure balanced type cage correspondingly; and the metal sealing piece cage I and the metal sealing piece cage II are arranged on the outer side of the graphite sealing ring group I and the graphite sealing ring group II correspondingly, and the metal sealing piece group I and the metal sealing piece group II are arranged on the metal sealing piece cage I and the metal sealing piece cage II correspondingly. According to the bidirectional seal valve seat suitable for multiple temperatures and working conditions, the combined type piston ring bidirectional sealing structure is adopted, bidirectional sealing of any valve seat is realized, and good sealing performance is achieved. Further, the bidirectional seal valve seat can be applied to multiple different working temperature environments and working conditions.
Description
technical field [0001] The invention relates to the field of valve seat sealing, in particular to a bidirectional sealing valve seat suitable for multi-temperature working conditions. Background technique [0002] In high temperature or low temperature working conditions, the requirements for flow resistance and sealing performance of the valve are particularly high. Therefore, ball valves and flat gate valves with diversion holes are mostly used in projects. These two types of valves adopt piston-type floating valve seat, which can automatically compensate the gap caused by material shrinkage or expansion due to temperature changes under the action of spring load and medium pressure, ensuring the sealing performance between the valve seat and the valve core. However, the seal between the floating valve seat and the valve body is the weakness of this type of valve. Leakage often occurs in engineering, which seriously affects the operation of the engineering system. [0003...
Claims
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IPC IPC(8): F16K5/20F16K3/30F16K3/16
CPCF16K3/16F16K3/30F16K5/20
Inventor 刘其斌郑志成王秋林刘敏葛好建
Owner SHANGHAI VALVE FACTORY