CN2361930Y

CN2361930Y - High-pressure safety valve

Info

Publication number: CN2361930Y
Application number: CN 98232012
Authority: CN
Inventors: 冯炜; 张韶华; 陆润有
Original assignee: ZHANGJIAKOU PETROLEUM MACHINERY FACTORY
Current assignee: ZHANGJIAKOU PETROLEUM MACHINERY FACTORY
Priority date: 1998-12-28
Filing date: 1998-12-28
Publication date: 2000-02-02
Anticipated expiration: 2008-12-28

Abstract

The utility model relates to a high-pressure safety valve, which is used for the circulatory system for protecting high pressure of a petroleum drilling well. The high-pressure safety valve is composed of a valve body, a protective cap, a valve core and a safety device. The utility model is characterized in that the safety device is composed of a safety arm, a rotating shaft, a safety pin and two supporting walls which are arranged on the valve body. The safety arm is arranged on the valve body through the rotating shaft. Through holes are arranged on the safety arm and supporting walls of the valve body and thus the safety pin can be inserted. When the pressure of the input end on the valve body is exceeded the setting pressure, the safety pin is cut off by the top rod of the valve core, and the valve is opened, and thus the slurry is overflowed from an outlet.

Description

High-pressure safety valve

The utility model relates to a kind of safety installations of the oil-well drilling equipment mesohigh circulatory system, specifically, is the high-pressure safety valve on the adapted oil drilling pump.

On oil-well rig, be protection drilling implementer's the person and device security in its cycle of higher pressure system, what match with high-pressure service pump has a high-pressure safety valve.The safety valve of Shi Yonging was a spring in the past, determined the safety pressure scope by the spring pressure of regulating safety valve.This safety valve, volume is big, wastes time and energy during adjusting, and is technical strong, generally needs the know-how personnel to operate.Even so, frequent use and the flexible variation of spring self along with safety valve also are difficult to adjust within the desirable safety pressure scope.

The purpose of this utility model is to provide a kind of above-mentioned shortcoming that overcomes, the high-pressure safety valve of simple in structure, easy to use, sensitivity, good reliability.

The utility model is achieved in that

This high-pressure safety valve is by valve body, spool, helmet, safty device are formed, spool is contained in the valve body, helmet is contained on the valve body, valve body has input interface, exhaust port, spool has loading piston to cooperate with valve body inner bore, the safty device of its valve are by the insurance arm, rotating shaft, two abutment wall on safety pin and the valve body are formed, the insurance arm is contained in two by rotating shaft and holds on the wall, on insurance arm and valve body abutment wall, respectively have apart from rotating shaft center different distance, one group of safety pin jack in different apertures, safety pin is inserted in the valve body abutment wall and insures in the arm via hole, to insure arm and fix, the push rod head on the spool withstands on the insurance arm.

The spring level pressure makes safety valve structure simpler for the shearing level pressure to adopt the utility model to become in the past, and safety pressure is accurate, and good reliability is operated also very conveniently, and different pressure can be selected for use different safety pins to insert in the corresponding jack and get final product.

The utility model is described in further detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is a high-pressure safety valve assembling front view;

Accompanying drawing 2 is high-pressure safety valve A-A sectional views;

This high-pressure safety valve is by upper valve body 3, following valve body 5, helmet 1, spool 7 and safty device are formed, valve body is connected by screw thread up and down, on the following valve body input interface 6 is arranged, exhaust port 4 is arranged on the upper valve body, the loading piston of spool matches with following valve body inner bore, the safty device of valve body are by insurance arm 9, rotating shaft 2, two abutment wall on safety pin 10 and the valve body are formed, insurance arm 9 is contained on valve body two abutment wall by rotating shaft 2, on insurance arm and valve body abutment wall, respectively have apart from rotating shaft center different distance, one group of safety pin jack in different apertures, safety pin 10 is inserted in valve body two abutment wall and insures in arm 9 via holes, the insurance arm is fixed, and push rod 8 heads on the spool withstand on the insurance arm 9.During use; require to select for use suitable safety pin 10 and jack thereof according to safety pressure; opening helmet 1 inserts safety pin; and the input interface of safety valve is connected with pressure system; when the pipeline mud pressure surpasses the setting safety pressure; the spool push rod promotes the insurance arm safety pin is cut off, and mud can overflow from exhaust port, has protected the safety of system.

Claims

1, a kind of high-pressure safety valve, by valve body, spool, helmet, safty device are formed, spool is contained in the valve body, helmet is contained on the valve body, valve body has input interface, exhaust port, spool has loading piston to cooperate with valve body inner bore, the safty device that it is characterized in that valve are by the insurance arm, rotating shaft, two abutment wall on safety pin and the valve body are formed, the insurance arm is contained on valve body two abutment wall by rotating shaft, respectively have apart from rotating shaft center different distance on insurance arm and valve body abutment wall, one group of safety pin jack in different apertures, safety pin are inserted in the valve body abutment wall and insure in the wall via hole, to insure arm and fix, the push rod head on the spool withstands on the insurance arm.