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Low-temperature plug valve

A plug valve, low temperature technology, applied in the field of plug valves, can solve the problems of unqualified materials, external leakage or internal leakage of the shell and sealing surface, and can not meet the requirements of use, and achieves strength and rigidity. Effect

Active Publication Date: 2014-08-20
施瑞德阀门(厦门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The material and structure of cryogenic valves are very important. If the material is unqualified, it will cause external or internal leakage of the shell and sealing surface; the comprehensive mechanical properties, strength and rigidity of the parts cannot meet the use requirements or even break

Method used

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Examples

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, the embodiment of the present invention includes a valve body 1, a cock 2, a cock sleeve 3, a valve body bushing 4, a spiral wound gasket 5, a diaphragm 6, a spiral wound gasket 7, a stuffing box 8, a valve cover 9, and an O-ring 10 , Stud 11, nut 12, antistatic spring 14, steel ball 15, circlip 16, fixed block 17, positioning piece 18, handle seat 19, handle 20, lock 21.

[0024] Specifically, as figure 1 , Figure 2-Figure 4 The valve body 1 includes a cavity 100 in the central area and a channel 102 for passing the medium. The side wall of the cavity 100 is provided with an annular groove 101 , and the valve body bushing 4 is embedded in the annular groove 101 . And the material of the valve body 1 is LCB (LCB cast steel grade, a low-temperature carbon steel of American standard), LC3 (Al-Zn-Mg-...

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Abstract

The invention provides a low-temperature plug valve which comprises a valve body, a plug, a stuffing box, a valve cap, a handle seat, a fixing block and a locating piece. The valve body comprises a cavity and a channel for media to pass through, wherein an annular groove is formed in the lateral wall of the cavity, and a valve body bush is embedded in the annular groove. Furthermore, the valve body is made of materials of LCB, LC3 and CF8. A medium through hole is formed in the plug, a plug rod is arranged at the upper portion of the plug, the plug is wrapped by a plug sleeve, the plug is arranged in the cavity of the valve body in a rotating mode, the plug sleeve and the valve body bush are in tight contact, the plug is made of stainless steel bead weld cobalt-based hard alloy, and the plug rod is made of 0Cr18Ni9. The stuffing box sleeves the plug rod in a sealed mode and is arranged above the plug. The valve cap covers the periphery of the stuffing box and is fixed to the valve body, and the valve cap is made of materials the same as the valve body. The handle seat is fixed to the upper end of the plug rod. The fixing block is fixed to the valve cap. One end of the locating piece is fixed to the upper portion of the plug rod, and the other end of the locating piece is fixedly connected with the fixing block. The structure and the materials of the low-temperature plug valve supplement each other, and the comprehensive mechanical performance is improved.

Description

[0001] technical field [0002] The invention relates to the technical field of plug valves, in particular to a low-temperature plug valve. [0003] Background technique [0004] Cryogenic valves usually refer to valves whose operating temperature is below -40° (Celsius, the same below). Generally used in ethylene, liquefied natural gas plants, natural gas LPG and LNG storage tanks and their receiving bases, satellite stations, air separation equipment, petrochemical tail gas separation equipment and liquid oxygen, liquid hydrogen, liquid nitrogen, liquid argon, carbon dioxide cryogenic storage tanks and Tank trucks, pressure swing adsorption oxygen production and other devices. [0005] In recent years, the demand for cryogenic valves has increased year by year, and the application fields have become more and more extensive. Cryogenic valves have become an important branch of valve products. Classified by function, cryogenic valves include cryogenic ball valves, cryogeni...

Claims

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Application Information

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IPC IPC(8): F16K5/02
CPCF16K5/0207F16K5/0242F16K5/0271F16K5/0285F16K27/062
Inventor 王斯伟
Owner 施瑞德阀门(厦门)有限公司
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