CN102620018B - High-temperature high-pressure pneumatic control automatic pressure relief valve - Google Patents

High-temperature high-pressure pneumatic control automatic pressure relief valve Download PDF

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Publication number
CN102620018B
CN102620018B CN201210095946.1A CN201210095946A CN102620018B CN 102620018 B CN102620018 B CN 102620018B CN 201210095946 A CN201210095946 A CN 201210095946A CN 102620018 B CN102620018 B CN 102620018B
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CN
China
Prior art keywords
valve
pilot valve
pressure
pilot
piston
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CN201210095946.1A
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Chinese (zh)
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CN102620018A (en
Inventor
徐文娴
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天正阀门有限公司
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Priority to CN201210095946.1A priority Critical patent/CN102620018B/en
Publication of CN102620018A publication Critical patent/CN102620018A/en
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Publication of CN102620018B publication Critical patent/CN102620018B/en

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Abstract

The invention relates to a high-temperature high-pressure pneumatic control automatic pressure relief valve, which comprises a main valve and a pilot valve. The main valve comprises a valve body, a valve clack, a valve rod and a valve cover. The high-temperature high-pressure pneumatic control automatic pressure relief valve is characterized in that: a piston cavity is formed on the upper part of the valve body; the upper end of the valve rod penetrates through the valve body, and is fixedly connected with a piston in the piston cavity; the flat area of the upper end face of the piston is larger than that of the lower end face of the valve clack; the pilot valve adopts a pneumatic control valve which comprises a pilot valve body, a pilot valve clack and a pneumatic device; an inlet of the pilot valve body is communicated with an inlet of the valve body, and an outlet of the pilot valve body is communicated with the piston cavity on one side of the upper plane of the piston; the pilot valve clack is connected with a transmission shaft of the pneumatic device; an air source control circuit of the pneumatic device is connected in series with a pressure control switch of a pressure sensor which is arranged in an intake vent of the valve body; and a discharge orifice is formed in the pilot valve body. The opening/closing state of the pilot valve is controlled according to a pressure signal of the pressure sensor by the pneumatic device. The high-temperature high-pressure pneumatic control automatic pressure relief valve has the advantages of accurate and stable set pressure, discharge pressure equal to the set pressure, and the like, and is applied to a pressure relief protection device of a high-temperature high-pressure vessel.

Description

High Temperature High Pressure gas control automatic decompression valve

Technical field

The present invention relates to valve field, specifically about a kind of Decompression valves.The present invention is applicable to the decompression protection device of the high temperature such as steam, nitrogen, high-pressure bottle.

Background technique

For the Decompression valves of pipeline, container, generally adopt Pilot operated safety valve structure at present, utilize pilot valve control main valve.Pilot valve is Direct spring loaded safety valve, has independently decompression function, and in the time that system pressure reaches Set pressure, pilot valve is opened, the medium of releasing in main valve piston chamber, and main spool spring promotes flap and opens.As the built-in Pilot operated safety valve that publication number is CN102313052A, comprise main valve and pilot valve, main valve comprises valve body, valve gap, main valve seat, main valve clack, main valve guide sleeve, main spool spring, main valve stop collar, pilot valve is arranged in the endoporus of main valve stop collar.In the time that pressure medium exceedes setup pressure value, medium promotes pilot valve flap compression pilot valve spring and opens pilot valve, and the pressure of releasing in the spring chamber of the main valve clack back side, makes main valve open relieving pressure, protective system safety.Its major defect is that spring is under different temperature condition, there is different elasticity coefficient, so there is larger fluctuation in Set pressure under the condition of high temperature, the degree of accuracy of its Set pressure is low, poor stability, discharge pressure and Set pressure differ larger, are not suitable for the high container of Set pressure required precision or pipe-line system and use.

Summary of the invention

The object of the invention is the shortcoming existing for prior art, provide a kind of Set pressure accurate, stable, discharge pressure and Set pressure differ little High Temperature High Pressure gas control automatic decompression valve.

Technological scheme of the present invention comprises main valve and pilot valve, and main valve comprises valve body, flap, valve rod, valve gap, and valve body is shaped with import and outlet, and valve rod lower end is fixedly connected with flap, and on flap, plane and valve body inlet passage side have the sealing surface cooperatively interacting.Be mainly that valve body top is shaped with piston cavity, valve rod upper end is fixedly connected with the piston in piston cavity through valve body, and the area of plane of piston upper-end surface is greater than the area of plane of flap lower end surface; Pilot valve adopts Pneumatic valve, this Pneumatic valve comprises pilot valve body, pilot valve lobe and Pneumatic actuator, the import of pilot valve body is communicated with valve body import, the outlet of pilot valve body is communicated with the piston cavity of plane on piston by connecting tube, pilot valve lobe is connected with the transmission shaft of Pneumatic actuator, on the source of the gas control circuit of Pneumatic actuator, be connected in series the pressure control switch of pressure transducer, this pressure transducer is arranged in valve body inlet passage, on pilot valve body, is shaped with discharge orifice.Pilot valve lobe is fitted on the sealing surface of pilot valve body suction side by a pilot valve lid by a spring, this pilot valve lid is shaped with the passage that is communicated with pilot valve body import and valve body import, between pilot valve lobe and pilot valve body, there is the sealing surface cooperatively interacting, lead valve clack sealing surface Yi Ce center be fixed with pilot valve body in the pilot hole guide rod that cooperatively interacts, the center line of this guide rod overlaps with the center line of Pneumatic actuator transmission shaft, transmission shaft is made up of one section of minor diameter push rod and one section of major diameter push rod, the end face of minor diameter push rod and the end face of guide rod contact mutually, on pilot valve body, be shaped with the matching hole coordinating with the motive sealing of major diameter push rod, this matching hole is communicated with discharge orifice, the position of described discharge orifice is positioned at the minor diameter push rod position of transmission shaft in the time that pilot valve cuts out, and pilot valve is positioned at the major diameter push rod position of transmission shaft while opening.

In above technological scheme, valve rod upper end connects a stabilizer, and described stabilizer is made up of pull bar, stretched spring and spring seat, and pull bar lower end is fixedly connected with valve rod upper end, pull bar upper end is through valve gap linking springs seat, and stretched spring is arranged between spring seat lower end surface and valve gap upper-end surface.

Advantage of the present invention be the open/close states of pilot valve by being arranged on pressure transducer in main valve inlet passage by Pneumatic actuator control, the Set pressure that makes main valve accurately, stable, the difference between actual discharge pressure and theoretical Set pressure is little.

brief description of the drawings

Fig. 1 is structure sectional view of the present invention.

embodiment

High Temperature High Pressure gas control automatic decompression valve as shown in Figure 1, comprise main valve and pilot valve, main valve comprises valve body 1, flap 2, valve rod 3, valve gap 8, valve body 1 is shaped with import and outlet, valve rod 3 lower ends are fixedly connected with flap 2, on flap 2, plane and valve body 1 inlet passage side have the sealing surface cooperatively interacting, and flap 2 is positioned at valve body 1 inlet passage, the sealing that cooperatively interacts of the sealing surface of seat between flap 2 sealing surfaces and valve body 1 inlet passage and outlet passage.Valve body 1 top is shaped with piston cavity 5, valve rod 3 upper ends are fixedly connected with the piston 7 in piston cavity 5 through valve body 1, in piston cavity 5, be provided with piston cylinder 6, this piston cylinder 6 is arranged in piston cavity 5 by valve gap 8 sealings, piston 7 coordinates in the interior motive sealing of piston cylinder 6, between valve rod 3 middle parts and valve body 1, be provided with axle sleeve 4, between this axle sleeve 4 and valve body 1 static seal coordinate, and valve rod 3 between motive sealing coordinate, the open to atmosphere through hole of the company of being shaped with in the piston cavity 5 of piston 7 lower end surfaces.The area of plane of piston 7 upper-end surfaces is greater than the area of plane of flap 2 lower end surfaces, and after pilot valve is opened, medium produces downward thrust to plane on piston 7 and is greater than flap 2 lower planes are produced to thrust upwards, makes main valve unlatching; Pilot valve adopts Pneumatic valve,

This Pneumatic valve comprises pilot valve body 17, pilot valve lobe and Pneumatic actuator 18, the import of pilot valve body 17 is communicated with valve body 1 import, the outlet of pilot valve body 17 is communicated with the piston cavity 5 of plane one side on piston 7 by connecting tube 15, pilot valve lobe is connected with the transmission shaft of Pneumatic actuator 18, on the source of the gas control circuit of Pneumatic actuator 18, be connected in series the pressure control switch of pressure transducer, this pressure transducer is arranged in valve body 1 inlet passage, is shaped with discharge orifice 20 on pilot valve body 17.In the time that in valve body 1 inlet passage, pressure medium exceedes Set pressure, pressure sensor signal is connected Pneumatic actuator 18 source of the gas of working, Pneumatic actuator 18 promotes pilot valve lobe valve body of main valve 1 inlet passage is communicated with plane on piston 7, and medium promotes piston 7 flap 2 is opened to the medium of releasing; In the time that in valve body 1 inlet passage, pressure medium is released lower than Set pressure, pressure sensor signal disconnects Pneumatic actuator 18 source of the gas of working, pilot valve lobe cuts off the passage between plane on valve body of main valve 1 inlet passage and piston 7, plane on piston 7 is communicated with discharge orifice 20 simultaneously, medium in bleed piston 7 in planar piston chamber 5 is closed flap 2 under medium thrust.The Set pressure of main valve is by pressure transducer control pilot valve, and its Set pressure precision is high, good stability, and discharge pressure equates with Set pressure.

Pilot valve lobe 23 is fitted on the sealing surface of pilot valve body 17 imports by a pilot valve lid 25 by a spring 24, i.e. top shock mount 24 between the back side of pilot valve lobe 23 sealing surfaces and pilot valve lid 25.Pilot valve lid 25 is shaped with the passage that is communicated with pilot valve body 17 imports and valve body 1 import, between pilot valve lobe 23 and pilot valve body 17, there is the sealing surface cooperatively interacting, when in valve body 1 inlet passage, pressure medium is lower than Set pressure, pressure sensor signal disconnects Pneumatic actuator 18 source of the gas of working, spring 24 compresses pilot valve lobe 23 and is sealed and matched with pilot valve body 17, pilot valve lobe 23 sealing surface Yi Ce centers be fixed with pilot valve body 17 in the pilot hole guide rod 22 that cooperatively interacts, described pilot hole is located at the center of pilot valve body 17 imports, the pod apertures 16 that 17 imports of pilot valve body are evenly distributed on pilot hole periphery by several forms, the center line of guide rod 22 overlaps with the center line of Pneumatic actuator 18 transmission shafts.Transmission shaft is made up of one section of minor diameter push rod 21 and one section of major diameter push rod 19, and the end face of the end face of minor diameter push rod 21 and guide rod 22 contacts mutually, and transmission shaft is less than with the diameter that guide rod 22 contacts one end one end that it is connected with Pneumatic actuator 18.On pilot valve body 17, be shaped with the matching hole coordinating with 19 motive sealings of major diameter push rod, this matching hole is communicated with discharge orifice 20, the position of discharge orifice 20 is positioned at minor diameter push rod 21 positions of transmission shaft in the time that pilot valve cuts out, and pilot valve is positioned at major diameter push rod 19 positions of transmission shaft while opening, make pilot valve close the medium back flow in planar piston chamber 5 on back piston 7 discharges from this discharge orifice 20 after 17 outlets of pilot valve body, main valve is closed, and pilot valve is opened rear propeller shaft by discharge orifice 20 shutoff, main valve inlet passage medium is through 17 imports of pilot valve body, pilot valve body 17 exports, entering plane promotion piston 7 on main valve piston 7 opens main valve.

Valve rod 3 upper ends connect a stabilizer, described stabilizer is made up of pull bar 12, stretched spring 13 and spring seat 14, pull bar 12 lower ends are fixedly connected with valve rod 3 upper ends, pull bar 12 upper ends are through valve gap 8 linking springs seats 14, stretched spring 13 is arranged between spring seat 14 lower end surfaces and valve gap 8 upper-end surfaces, tension flap 2 and sealing surface of seat fitted seal, prevent that flap 2 from vibrating.

Between pull bar 12 and valve gap 8, forming motive sealing by stuffing box packing 9, Gland 11 and gland nut 10 coordinates.

Claims (2)

1. a High Temperature High Pressure gas control automatic decompression valve, comprise main valve and pilot valve, main valve comprises valve body (1), flap (2), valve rod (3), valve gap (8), valve body (1) is shaped with import and outlet, valve rod (3) lower end is fixedly connected with flap (2), and the upper plane of flap (2) and valve body (1) inlet passage side have the sealing surface cooperatively interacting, it is characterized in that valve body (1) top is shaped with piston cavity (5), valve rod (3) upper end is fixedly connected with the piston (7) in piston cavity (5) through valve body (1), and the area of plane of piston (7) upper-end surface is greater than the area of plane of flap (2) lower end surface, pilot valve adopts Pneumatic valve, this Pneumatic valve comprises pilot valve body (17), pilot valve lobe and Pneumatic actuator (18), the import of pilot valve body (17) is communicated with valve body (1) import, the outlet of pilot valve body (17) is communicated with the piston cavity (5) of the upper plane of piston (7) by connecting tube (15), pilot valve lobe is connected with the transmission shaft of Pneumatic actuator (18), on the source of the gas control circuit of Pneumatic actuator (18), be connected in series the pressure control switch of pressure transducer, this pressure transducer is arranged in valve body (1) inlet passage, on pilot valve body (17), be shaped with discharge orifice (20), pilot valve lobe (23) is fitted on the sealing surface of pilot valve body (17) import by a pilot valve lid (25) by a spring (24), pilot valve lid (25) is shaped with the passage that is communicated with pilot valve body (17) import and valve body (1) import, between pilot valve lobe (23) and pilot valve body (17), there is the sealing surface cooperatively interacting, pilot valve lobe (23) sealing surface Yi Ce center be fixed with pilot valve body (17) in the pilot hole guide rod (22) that cooperatively interacts, the center line of guide rod (22) overlaps with the center line of Pneumatic actuator (18) transmission shaft, transmission shaft is made up of one section of minor diameter push rod (21) and one section of major diameter push rod (19), the end face of the end face of minor diameter push rod (21) and guide rod (22) contacts mutually, on pilot valve body (17), be shaped with the matching hole coordinating with major diameter push rod (19) motive sealing, this matching hole is communicated with discharge orifice (20), the position of discharge orifice (20) is positioned at minor diameter push rod (21) position of transmission shaft in the time that pilot valve cuts out, and pilot valve is positioned at major diameter push rod (19) position of transmission shaft while opening.
2. High Temperature High Pressure gas control automatic decompression valve according to claim 1, it is characterized in that valve rod (3) upper end connects a stabilizer, described stabilizer is made up of pull bar (12), stretched spring (13) and spring seat (14), pull bar (12) lower end is fixedly connected with valve rod (3) upper end, pull bar (12) upper end is through valve gap (8) linking springs seat (14), and stretched spring (13) is arranged between spring seat (14) lower end surface and valve gap (8) upper-end surface.
CN201210095946.1A 2012-03-29 2012-03-29 High-temperature high-pressure pneumatic control automatic pressure relief valve CN102620018B (en)

Priority Applications (1)

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CN201210095946.1A CN102620018B (en) 2012-03-29 2012-03-29 High-temperature high-pressure pneumatic control automatic pressure relief valve

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Application Number Priority Date Filing Date Title
CN201210095946.1A CN102620018B (en) 2012-03-29 2012-03-29 High-temperature high-pressure pneumatic control automatic pressure relief valve

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CN102620018B true CN102620018B (en) 2014-07-23

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102954257A (en) * 2012-11-30 2013-03-06 常州天旭机电制造有限公司 Voltage regulation protection valve
CN103899807B (en) * 2014-04-22 2016-05-11 安徽铜都流体科技股份有限公司 The low maintenance type pressure release/holding valve of external spring
CN104154283A (en) * 2014-08-11 2014-11-19 袁前灿 All-metal sealing high-temperature pilot inner discharging type pressure release valve
CN104864142B (en) * 2015-05-25 2018-08-24 杭州华惠阀门有限公司 A kind of pressure relief system
CN104930227A (en) * 2015-06-09 2015-09-23 李华良 Safe exhaust valve
CN105643903B (en) * 2016-03-19 2017-12-26 泰州市梦之谷科技发展有限公司 Ultrahigh molecular weight polyethylene tubing extruder cooling line relief valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2330839Y (en) * 1998-06-26 1999-07-28 乐山市热工仪表有限公司 Leading safety valve
CN102147028A (en) * 2011-04-15 2011-08-10 王元清 Low-pressure pilot operated safety valve
CN102313053A (en) * 2011-08-17 2012-01-11 永一阀门集团有限公司 Air suction type safety valve
CN202510785U (en) * 2012-03-29 2012-10-31 天正阀门有限公司 High-temperature high-pressure pneumatic control automatic pressure release valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR170400A0 (en) * 2000-11-28 2000-12-21 Ifield Technology Ltd Emergency energy release for hydraulic energy storage systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2330839Y (en) * 1998-06-26 1999-07-28 乐山市热工仪表有限公司 Leading safety valve
CN102147028A (en) * 2011-04-15 2011-08-10 王元清 Low-pressure pilot operated safety valve
CN102313053A (en) * 2011-08-17 2012-01-11 永一阀门集团有限公司 Air suction type safety valve
CN202510785U (en) * 2012-03-29 2012-10-31 天正阀门有限公司 High-temperature high-pressure pneumatic control automatic pressure release valve

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