CN204127415U - High-temperature pilot-operated type safety valve - Google Patents

High-temperature pilot-operated type safety valve Download PDF

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Publication number
CN204127415U
CN204127415U CN201420525175.XU CN201420525175U CN204127415U CN 204127415 U CN204127415 U CN 204127415U CN 201420525175 U CN201420525175 U CN 201420525175U CN 204127415 U CN204127415 U CN 204127415U
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CN
China
Prior art keywords
valve
pilot
main
chamber
main valve
Prior art date
Application number
CN201420525175.XU
Other languages
Chinese (zh)
Inventor
徐文娴
张俊策
张宏
金秀烙
Original Assignee
天正阀门有限公司
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Filing date
Publication date
Application filed by 天正阀门有限公司 filed Critical 天正阀门有限公司
Priority to CN201420525175.XU priority Critical patent/CN204127415U/en
Application granted granted Critical
Publication of CN204127415U publication Critical patent/CN204127415U/en

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Abstract

The utility model relates to a kind of high-temperature pilot-operated type safety valve, comprises main valve and pilot valve, and main valve comprises main valve body, main valve clack, main valve lid; Mainly main valve control chamber is connected and composed by sylphon seal by main valve clack and main valve lid, main valve clack back outer circle face with to be fixed in valve pocket that guide sleeve is dynamic to be coordinated, bellows lower end and main valve clack seal welding, the sealing of bellows upper end is arranged between main valve body and main valve lid, center, main valve clack back side fixed installation position-limited lever; Pilot valve body is made up of lower valve body, middle valve body and upper valve body, in lower valve chamber between middle valve body and lower valve body, spool is installed, in uuper valve chamber between middle valve body and upper valve body, pilot valve lobe is installed, be shaped with the passage being communicated with uuper valve chamber and lower valve chamber in middle valve body, the push rod be fixedly connected with spool is set in this passage; Pressure setting device is arranged in upper valve body and pilot valve lid, and the upper valve body between pressure setting device and uuper valve chamber installs radiating fin.Its Set pressure by medium temperature affect little, Set pressure good stability, precision are high.

Description

High-temperature pilot-operated type safety valve
Technical field
The utility model belongs to valve field, specifically about a kind of Pilot operated safety valve.The utility model is applicable to the safety valve of high-temperature medium container.
Background technique
Pilot operated safety valve is made up of pilot valve and main valve, and the import of pilot valve is communicated with main valve inlet, and the control mouth of pilot valve is communicated with the control chamber of main valve, and the control mouth of pilot valve and bleed outlet and import switch by the flap of pilot valve to be connected.When normal operating pressure, import is communicated with control mouth by the flap of pilot valve, and isolates with bleed outlet, and import pressure medium enters main valve control chamber by flap and closes; When pressure medium reaches pilot valve spring Set pressure, the flap of pilot valve will control mouth and be communicated with bleed outlet, and isolate with import, be released by pressure medium in main valve control chamber, make the flap of main valve open inlet pressure of releasing, the pressure of pressurized container is remained in Set pressure.Its major defect is: the pressure setting spring fitting of pilot valve is between pilot valve valve body upper-end surface and valve gap, medium temperature in pilot valve valve pocket is directly transferred on pressure setting spring, in worst hot case, larger change is produced to the elastic force of spring, affect Set pressure value, Set pressure low precision.
Summary of the invention
The purpose of this utility model is the shortcoming existed for prior art, provides a kind of Set pressure to affect little, that Set pressure good stability, precision are high high-temperature pilot-operated type safety valve by medium temperature.
The technical solution of the utility model comprises main valve and pilot valve, main valve comprises main valve body, main valve clack, main valve lid, pilot valve comprises pilot valve body, pilot valve lobe, pilot valve lid and pressure setting device, and pilot valve import is communicated with main valve inlet, and pilot valve controls mouth and is communicated with main valve control chamber, mainly main valve control chamber is connected and composed by sylphon seal by main valve clack and main valve lid, main valve clack back outer circle face with to be fixed in valve pocket that guide sleeve is dynamic to be coordinated, bellows lower end and main valve clack seal welding, the sealing of bellows upper end is arranged between main valve body and main valve lid, center, main valve clack back side fixed installation position-limited lever, pilot valve body is by lower valve body, middle valve body and upper valve body composition, in lower valve chamber between middle valve body and lower valve body, spool is installed, in uuper valve chamber between middle valve body and upper valve body, pilot valve lobe is installed, middle valve body upper-end surface is shaped with the sealing surface cooperatively interacted with pilot valve lobe lower end surface, middle valve body lower end face is shaped with the sealing surface cooperatively interacted with spool upper-end surface, the passage being communicated with uuper valve chamber and lower valve chamber is shaped with in middle valve body, the push rod be fixedly connected with spool is set in this passage, the middle part of this passage is communicated with control mouth, push rod upper-end surface and center, pilot valve lobe lower end surface contact, uuper valve chamber and lower valve chamber respectively with bleed outlet and inlet communication, pressure setting device is arranged in upper valve body and pilot valve lid, and the upper valve body between pressure setting device and uuper valve chamber installs radiating fin.
Exist in above technological scheme, spool periphery coordinates with lower body cavity wall is dynamic, and be shaped with axial circulation groove, between spool upper-end surface sealing surface and middle valve body lower end face sealing surface, there is gap, be provided with in the middle part of push rod and move with middle valve channel inwall the guide ring coordinated, guide ring outer peripheral surface is shaped with axial circulation groove.
Exist in above technological scheme, pilot valve lobe periphery coordinates with uuper valve chamber internal chamber wall is dynamic, and pilot valve lobe is shaped with the through hole being communicated with its periphery and uuper valve chamber.
The utility model has the advantages that pressure setting device is arranged on upper valve body upper end, distant from valve pocket, and radiating fin is set between pressure setting device and uuper valve chamber, reduce medium temperature on the impact of pressure setting device spring, its Set pressure by medium temperature affect little, Set pressure good stability, precision are high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
High-temperature pilot-operated type safety valve as shown in Figure 1, comprise main valve and pilot valve, main valve comprises main valve body 1, main valve clack 2, main valve lid 9, and pilot valve comprises pilot valve body, pilot valve lobe 17, pilot valve lid 24 and pressure setting device, pilot valve import is communicated with main valve inlet, and pilot valve controls mouth and is communicated with main valve control chamber 6, main valve control chamber 6 to be tightly connected by bellows 5 by main valve clack 2 and main valve lid 9 and to form, main valve clack 2 back outer circle face with to be fixed in valve pocket that guide sleeve 4 is dynamic to be coordinated, guide sleeve 4 upper end is arranged between trim ring 7 lower end surface and main valve body 1, bellows 5 lower end and main valve clack 2 seal welding, the sealing of bellows 5 upper end is arranged between main valve body 1 and main valve lid 9, center, main valve clack 2 back side fixed installation position-limited lever 3, the distance between this position-limited lever 3 upper-end surface and main valve lid 9 lower end surface is the Lift of main valve clack 2, pilot valve body is by lower valve body 10, middle valve body 15 and upper valve body 20 form, middle valve body 15 is fixedly connected with by bolt seal with between lower valve body 10 and upper valve body 20, in lower valve chamber 12 between middle valve body 15 and lower valve body 10, spool 11 is installed, in uuper valve chamber 18 between middle valve body 15 and upper valve body 20, pilot valve lobe 17 is installed, middle valve body 15 upper-end surface is shaped with the sealing surface cooperatively interacted with pilot valve lobe 17 lower end surface, middle valve body 15 lower end surface is shaped with the sealing surface cooperatively interacted with spool 11 upper-end surface, the passage being communicated with uuper valve chamber 18 and lower valve chamber 12 is shaped with in middle valve body 15, the push rod 14 be fixedly connected with spool 11 is set in this passage, the middle part of this passage is communicated with control mouth, push rod 14 upper-end surface and center, pilot valve lobe 17 lower end surface contact, uuper valve chamber 18 and lower valve chamber 12 respectively with bleed outlet 16 and inlet communication, under regular operating pressures, pilot valve inlet pressure is less than Set pressure, spool 11 and middle valve body 15 opening state, pilot valve import is communicated with control mouth, suction side pressure is introduced main valve control chamber 6, close under main valve clack 2 gravity and bellows 5 compression force, when pressure medium reaches Set pressure, import pressure medium promotes spool 11 and is sealed and matched with middle valve body 15, pilot valve lobe 17 is backed down in push rod 14 upper end simultaneously, pilot valve is controlled mouth to be communicated with bleed outlet 16, main valve control chamber 6 pressure medium is released, main valve clack 2 is pushed open pressure release by import pressure medium, pressure setting device is arranged on upper valve body 20 with in pilot valve lid 24, upper valve body 20 between pressure setting device and uuper valve chamber 18 installs radiating fin 19, pressure setting device is made up of setting spring 22, Adjusting bolt Adjusting screw 25, valve rod 21, setting spring 22 is fitted between upper spring seat 23 on valve rod 21 and lower spring cup by Adjusting bolt Adjusting screw 25, top, valve rod 21 lower end is pressed in center, flap 17 back side, and Adjusting bolt Adjusting screw 25 is fixed on pilot valve lid 24 by tightening nut 26.
Spool 11 periphery coordinates with lower valve body 10 internal chamber wall is dynamic, and be shaped with axial circulation groove, import medium is made to flow to control mouth by this circulation groove, between spool 11 upper-end surface sealing surface and middle valve body 15 lower end surface sealing surface, there is gap, namely under regular operating pressures, when push rod 14 upper-end surface and pilot valve lobe 17 lower end surface contact, between spool 11 upper-end surface sealing surface and middle valve body 15 lower end surface sealing surface, there is gap, also there is gap between spool 11 lower end surface and lower valve body 10 inlet end face, import medium flows to control mouth from this gap, be provided with in the middle part of push rod 14 and move with middle valve body 15 vias inner walls the guide ring 13 coordinated, guide ring 13 outer peripheral surface is shaped with axial circulation groove, medium can therefrom be passed through between valve body 15 passage and guide ring 13.
Pilot valve lobe 17 periphery coordinates with uuper valve chamber 18 internal chamber wall is dynamic, and pilot valve lobe 17 is shaped with the through hole be communicated with between its periphery and uuper valve chamber 18.
Bellows 5 upper end seal welding is at positioning ring 8 inner ring surface, and positioning ring 8 sealing is arranged between trim ring 7 lower end surface and guide sleeve 4 end face.

Claims (3)

1. a high-temperature pilot-operated type safety valve, comprise main valve and pilot valve, main valve comprises main valve body (1), main valve clack (2), main valve lid (9), pilot valve comprises pilot valve body, pilot valve lobe (17), pilot valve lid (24) and pressure setting device, pilot valve import is communicated with main valve inlet, and pilot valve controls mouth and is communicated with main valve control chamber (6), it is characterized in that main valve control chamber (6) to be tightly connected by bellows (5) by main valve clack (2) and main valve lid (9) to form, main valve clack (2) back outer circle face be fixed on that guide sleeve in valve pocket (4) is dynamic to be coordinated, bellows (5) lower end and main valve clack (2) seal welding, the sealing of bellows (5) upper end is arranged between main valve body (1) and main valve lid (9), main valve clack (2) center, back side fixed installation position-limited lever (3), pilot valve body is by lower valve body (10), middle valve body (15) and upper valve body (20) composition, in lower valve chamber (12) between middle valve body (15) and lower valve body (10), spool (11) is installed, in uuper valve chamber (18) between middle valve body (15) and upper valve body (20), pilot valve lobe (17) is installed, middle valve body (15) upper-end surface is shaped with the sealing surface cooperatively interacted with pilot valve lobe (17) lower end surface, middle valve body (15) lower end surface is shaped with the sealing surface cooperatively interacted with spool (11) upper-end surface, the passage being communicated with uuper valve chamber (18) and lower valve chamber (12) is shaped with in middle valve body (15), the push rod (14) be fixedly connected with spool (11) is set in this passage, the middle part of this passage is communicated with control mouth, push rod (14) upper-end surface and pilot valve lobe (17) center, lower end surface contact, uuper valve chamber (18) and lower valve chamber (12) respectively with bleed outlet (16) and inlet communication, pressure setting device is arranged on upper valve body (20) with in pilot valve lid (24), and the upper valve body (20) between pressure setting device and uuper valve chamber (18) installs radiating fin (19).
2. high-temperature pilot-operated type safety valve according to claim 1, it is characterized in that spool (11) periphery and lower valve body (10) internal chamber wall are dynamic to coordinate, and be shaped with axial circulation groove, between spool (11) upper-end surface sealing surface and middle valve body (15) lower end surface sealing surface, there is gap, push rod (14) middle part is provided with the guide ring (13) moving with middle valve body (15) vias inner walls and coordinate, and guide ring (13) outer peripheral surface is shaped with axial flow groove.
3. high-temperature pilot-operated type safety valve according to claim 1 and 2, it is characterized in that pilot valve lobe (17) periphery and uuper valve chamber (18) internal chamber wall are dynamic to coordinate, pilot valve lobe (17) is shaped with the through hole be communicated with between its periphery and uuper valve chamber (18).
CN201420525175.XU 2014-09-10 2014-09-10 High-temperature pilot-operated type safety valve CN204127415U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420525175.XU CN204127415U (en) 2014-09-10 2014-09-10 High-temperature pilot-operated type safety valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420525175.XU CN204127415U (en) 2014-09-10 2014-09-10 High-temperature pilot-operated type safety valve

Publications (1)

Publication Number Publication Date
CN204127415U true CN204127415U (en) 2015-01-28

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ID=52383773

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420525175.XU CN204127415U (en) 2014-09-10 2014-09-10 High-temperature pilot-operated type safety valve

Country Status (1)

Country Link
CN (1) CN204127415U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105065738A (en) * 2015-07-17 2015-11-18 永一阀门集团有限公司 Adjustable-flow pilot-operated type safety valve with induction tube
CN105864496A (en) * 2016-05-27 2016-08-17 永阀门集团有限公司 Backpressure-adjusting pilot operated safety valve
CN106122543A (en) * 2016-07-20 2016-11-16 上海宇航系统工程研究所 A kind of excessive valve of gaps formula peace
CN106195369A (en) * 2016-07-20 2016-12-07 上海宇航系统工程研究所 A kind of chamber isolated peace is overflow valve and method of work
CN106499851A (en) * 2015-08-20 2017-03-15 北京航天石化技术装备工程有限公司 A kind of all-metal sealing pilot operated safety valve
CN109281886A (en) * 2018-11-19 2019-01-29 北京宇航系统工程研究所 A kind of electric-controlled type low temperature easing valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105065738A (en) * 2015-07-17 2015-11-18 永一阀门集团有限公司 Adjustable-flow pilot-operated type safety valve with induction tube
CN106499851B (en) * 2015-08-20 2019-02-01 北京航天石化技术装备工程有限公司 A kind of all-metal sealing pilot operated safety valve
CN106499851A (en) * 2015-08-20 2017-03-15 北京航天石化技术装备工程有限公司 A kind of all-metal sealing pilot operated safety valve
CN105864496A (en) * 2016-05-27 2016-08-17 永阀门集团有限公司 Backpressure-adjusting pilot operated safety valve
CN106122543A (en) * 2016-07-20 2016-11-16 上海宇航系统工程研究所 A kind of excessive valve of gaps formula peace
CN106195369A (en) * 2016-07-20 2016-12-07 上海宇航系统工程研究所 A kind of chamber isolated peace is overflow valve and method of work
CN106195369B (en) * 2016-07-20 2018-07-06 上海宇航系统工程研究所 The excessive valve of the chamber isolated peace of one kind and method of work
CN109281886A (en) * 2018-11-19 2019-01-29 北京宇航系统工程研究所 A kind of electric-controlled type low temperature easing valve

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