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Pilot operated safety valve for high-temperature working conditions

A technology for pilot-operated safety valves and high-temperature working conditions, applied in safety valves, valve details, balance valves, etc., can solve problems such as unsatisfactory, and achieve the effects of ensuring sealing performance, reducing medium temperature, and good self-lubricating ability

Active Publication Date: 2017-10-27
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spring direct load safety valves and ordinary pilot safety valves cannot meet the above requirements

Method used

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  • Pilot operated safety valve for high-temperature working conditions
  • Pilot operated safety valve for high-temperature working conditions

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Embodiment Construction

[0058] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0059] Such as Figure 1-2A pilot-operated safety valve for high-temperature working conditions shown includes a main valve 1 , a pilot valve 2 and a heat exchange device 3 .

[0060] The main valve 1 includes a main valve body 4, an adjustment ring 5, a scoop pipe 6, a main valve seat 7, a main valve disc 8, a recoil disc 9, a main valve guide sleeve I10, and a main valve guide sleeve II11 , Main valve piston 12 and cover plate 13.

[0061] The main valve body 4 is a cavity structure, and one end of the main valve seat 7 is arranged inside the main valve body 4, and the other end passes through the bottom of the main valve body 4 and is fixed with the main valve body 4 by threads. connect.

[0062] The adjusting ring 5 is arranged below the main valve seat 7 , and the dipper tube 6 is arranged on the adjusting ring 5 .

[0063] T...

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Abstract

The invention relates to the technical field of valve design, and specifically discloses a pilot operated safety valve for high-temperature working conditions. The pilot operated safety valve for the high-temperature working conditions comprises a main valve, a pilot valve and a heat exchange device, wherein the pilot valve is connected with one end of the heat exchange device, a gas chamber of the main valve and the valve body cavity of the main valve through pressure pipes respectively, and the other end of the heat exchange device is connected with a dipper-shaped pipe arranged at the main valve through a pressure pipe. According to the pilot operated safety valve for the high-temperature working conditions, an inlet seal structure is designed in the pilot valve so as to prevent a medium from entering the gas chamber of the main valve through the pilot valve, and an outlet seal structure is designed in the pilot valve so as to prevent a medium in the gas chamber of the main valve from entering the outlet of the pilot valve; in addition, a metal hard seal structure is adopted in the sealing surface of the main valve, a valve flap of the main valve is mounted on a recoil plate and can swing slightly, and when the main valve is closed, the valve flap of the main valve can be automatically calibrated so as to improve the sealing performance of the main valve while the problem of high-temperature seal of the main valve is solved.

Description

technical field [0001] The invention belongs to the technical field of valve design, and in particular relates to a pilot-operated safety valve used in high-temperature working conditions. Background technique [0002] Pilot-operated safety valve is a very important type of product in safety valves. It consists of a main valve and a pilot valve, and relies on the medium discharged by the pilot valve to drive or control the opening of the main valve. Compared with the spring direct load safety valve, the pilot safety valve has the advantages of compact structure, stable performance, allowable working pressure close to the set pressure, operating performance and opening height are not affected by back pressure, and can quickly and fully recover with less overpressure. start. [0003] The sealing structure of the main valve and pilot valve in conventional pilot-operated safety valves is mainly made of non-metallic materials such as rubber O-rings or fluoroplastics. Due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/04F16K27/02F16K27/12F16K31/122F16K41/02
CPCF16K17/044F16K27/02F16K27/12F16K31/122F16K41/02
Inventor 何睿于红辉娄少华张萍王学彬鲍鲜宇翟红波黄镇海
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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