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safety valve

A safety valve and valve body technology, applied in the field of safety valves, can solve problems such as inability to return seats effectively, frost on the inner wall of the valve, resource loss, etc., to solve the problems of excessive early opening at low temperature, prevention of low temperature leakage, and reduction of contact area Effect

Active Publication Date: 2018-01-09
ROTAREX STAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-temperature safety valves currently on the market are opened in advance at low temperatures with a pre-set pressure range. After opening, they cannot effectively return to the seat or even get stuck, resulting in resource loss. Moreover, these valves often have the problem of early pressure relief after frequent work, and in the There will be frost on the inner wall of the valve at low temperature

Method used

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Embodiment Construction

[0039] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention.

[0040] Glossary

[0041] The lower end of the seat: refers to the flange surrounding the dimple

[0042] Cryogenic safety valve: a valve with a medium temperature between -29°C and -100°C.

[0043] Ultra-low temperature safety valve: a valve with a medium temperature below -100°C.

[0044] figure 1 It is an exploded perspective view of the safety valve of the present invention, figure 2 It is a sectional view of the safety valve of the present invention. like Figure 1~2 As shown, the safety valve 100 of the present invention includes a...

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Abstract

The invention discloses a safety valve which comprises a valve body, a sealing assembly and a spring assembly, and the sealing assembly and the spring assembly are installed in the valve body. The sealing assembly comprises a valve seat and a piston, a sealing seat matched with the valve seat is arranged in the valve body, the sealing seat is provided with an outer conical sealing surface, the valve seat is provided with a pit matched with the sealing seat, and the interior of the pit is provided with an inner conical surface matched with the outer conical sealing surface. According to the safety valve, condensate water and other impurities generated by moist air in the valve body at the ultralow temperature can not be deposited on the valve seat, and meanwhile the low-temperature leakage caused by low-temperature shrinkage distortion of sealing materials can be avoided.

Description

technical field [0001] The invention relates to the field of valves, in particular to a safety valve. Background technique [0002] According to the structural form, the safety valve can be divided into pendant type, lever type, spring type and pilot type (pulse type); according to the structure of the valve body, it can be divided into two types: closed type and non-closed type. The closed safety valve means that the discharged medium does not leak out, and all of it is discharged to the designated place along the outlet, and is generally used in toxic and corrosive media. For air and steam safety valves, non-closed safety valves are mostly used. The selection of safety valve products should be determined according to the actual sealing pressure. [0003] For spring direct load safety valves, due to the small molecular weight of LNG, low viscosity, strong permeability, and easy leakage and diffusion, cryogenic valves are extremely important for the safe and reliable opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/04F16K1/42F16K27/02B01D35/04
CPCB01D35/046F16K17/0406F16K17/0466F16K27/02
Inventor 刘元磊曹广滨
Owner ROTAREX STAR
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