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Pilot-operated safety valve with independent air source control

A pilot-operated safety valve and independent air source technology, applied in safety valves, valve details, balance valves, etc., can solve problems such as blockage and corrosion of pilot valve flow passages, and achieve the effect of expanding the scope of application and the scope of use.

Active Publication Date: 2017-03-01
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

[0004] The purpose of the present invention is to provide a pilot-operated safety valve with independent air source control to solve the problem of clogging and corrosion of the inner channel of the pilot valve caused by conventional modulated pilot valves in medium with high viscosity

Method used

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  • Pilot-operated safety valve with independent air source control

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Embodiment Construction

[0017] A pilot-operated safety valve with independent air source control according to the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 and figure 2 As described above, a pilot-operated safety valve with independent air source control according to the present invention mainly includes a main valve 1, a pilot valve 2, a buffer tank 3, a pressure reducing valve 4, a check valve 10, a pressure sensor 6 and Independent gas source 11, etc.

[0019] The lower part of the main valve 1 is the main valve disc 9, and the upper part is the main valve air chamber 5.

[0020] The pilot valve 2 includes a valve body 16 , a valve cover 18 is fixed above the valve body 16 through bolt connection, and a valve shaft 17 is arranged in the valve body 16 . The bonnet 21 is fixed above the bonnet 18 ; the adjusting screw 19 is arranged on the top of the bonnet 18 and inside the bonnet 21 .

[...

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Abstract

The invention provides a pilot operated safety valve with independent gas source control. The pilot operated safety valve comprises a main valve and a pilot valve, wherein a buffer tank is located between the pilot valve and an independent gas source; a pressure sensor is located between the buffer tank and the pilot valve; the buffer tank and each of the pilot valve, the independent gas source and the pressure sensor are connected by a pipeline; a pressure reducing valve and a check valve are arranged on the pipeline, which is connected with the buffer tank and the independent gas source; the gas of the independent gas source enters the buffer tank through the pipeline; the gas of the buffer tank enters a lower cavity of the pilot valve from a valve shaft of the pilot valve through the pipeline. According to the pilot operated safety valve, as independent, stable, and clean gas source pressure is introduced into the pilot valve and a main valve gas chamber, the problem that a medium blocks an internal flow channel of the pilot valve is solved; the influence, caused by pressure fluctuation in the pipeline, on the valve performance is overcome; the application range of the pilot operated safety valve is expanded.

Description

technical field [0001] The invention relates to a pilot-operated safety valve used for overpressure protection of a pressure system, in particular to a pilot-operated safety valve with independent air source control. Background technique [0002] The pilot-operated safety valve uses the pilot valve to control the opening and closing of the main valve. The conventional pilot-operated safety valve has the characteristics of high back pressure resistance, large flow, high pressure and compact installation location. The working pressure is allowed to be close to the setting pressure of the safety valve. The action performance and opening height of the safety valve are not affected by the back pressure, and the main valve can quickly reach the full opening state with a small overpressure. Among them, the modulated pilot valve is a high-end product among the pilot valve products. It has the outstanding feature of proportional opening (closing) with the increase (decrease) of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/36F16K37/00F16K17/36
CPCF16K17/36F16K31/36F16K37/0025
Inventor 于红辉郭清云娄少华王亦逍鲍鲜宇王学彬
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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