CN201202859Y - Main valve seal structure of high pressure leading safety valve - Google Patents
Main valve seal structure of high pressure leading safety valve Download PDFInfo
- Publication number
- CN201202859Y CN201202859Y CNU200820063349XU CN200820063349U CN201202859Y CN 201202859 Y CN201202859 Y CN 201202859Y CN U200820063349X U CNU200820063349X U CN U200820063349XU CN 200820063349 U CN200820063349 U CN 200820063349U CN 201202859 Y CN201202859 Y CN 201202859Y
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- Prior art keywords
- valve
- soft seal
- seal pad
- spool
- valve seat
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Abstract
The utility model provides the main valve seal structure of a high-pressure guide safety valve used for the natural gas gathering and transportation devices and the containers; the main valve seal structure includes a valve core sleeve, a valve core, a spring, a valve base, a flexible seal cushion and an O-shaped seal ring; wherein, the lower end of the valve core is shaped like a conical lug boss and provided with a concave groove; the flexible seal cushion is arranged on the upper end of the valve base; the valve core sleeve is a stepped inner hole; the flexible seal cushion is pressed by the lower end step of the valve core sleeve and the upper end step of the valve base inner sleeve simultaneously; the upper convex section of the flexible seal cushion is the arc-shaped annular surface; the seal reliability and long service life requirement of the main valve seal piece under high pressure are satisfied.
Description
Technical field
The utility model relates to the Sealing class, particularly a kind of high pressure Pilot operated safety valve main valve sealing configuration that is used on the equipment such as gas collector and delivery pipe device, container.
Background technique
Be applied to the gas collector and delivery pipe device at present, Pilot operated safety valve on the equipment such as container, its main valve soft seal pad embeds spool bottom inner chamber and moves up and down with spool, valve core housing is having the U-shaped window bottom with the gas of releasing, the soft seal pad contacts the sealing surface that forms with valve seat be fixed width, when the safety valve setting pressure is higher, valve core of main valve the moment of opening when medium total head difference is released huge adsorption force the soft seal pad that embeds spool can be pulled out and torn, huge inertial force can make soft seal pad bump valve seat cause the sealing surface excess compression and make seal failure when returning seat, can't satisfy the reliability and the long lifetime requirement of high pressure lower seal.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiency of present technology Pilot operated safety valve main valve sealing configuration under the more and more higher situation of setting pressure, and design a kind of novel high pressure Pilot operated safety valve main valve sealing configuration, to satisfy sealing reliability and the long lifetime requirement under high pressure of main valve Sealing.
The purpose of this utility model is achieved through the following technical solutions: a kind of high pressure Pilot operated safety valve main valve sealing configuration, comprise valve core housing, spool, spring, valve seat, soft seal pad and O-ring seals composition, and it is characterized in that:
A, soft seal pad are located at the valve seat upper end, and Transverse plane is provided with O-ring seals on the valve seat, and is provided with boss so that the soft seal pad snaps in, and flexible the mistake in the screw-thread fit valve seat overlapped in the valve seat, and the upper end step of cover compresses the soft seal pad in the valve seat;
B, spool lower end become conical surface boss, are processed with groove at the circumference of conical surface boss, and the spool external cylindrical surface has circular groove;
C, valve core housing are the stepped shape endoporus, and its lower end step compresses soft seal pad cylindrical, and the surface of contact of spool upper-end surface and valve core housing upper step is the total travel confined planes of spool, and the valve core housing middle part has bleeder port.
It is the circumferentia of circular arc that the cross section is protruded on described soft seal pad top.
The set upper side step surface is higher than the circumferentia on soft seal pad top in the valve seat after compressing the soft seal pad.
The utility model compared with prior art has the following advantages:
1. the soft seal pad is located at the valve seat upper end, soft seal pad above and below is the plane, the circumferentia design that the cross section is a circular arc is protruded on top, along with setting pressure raises, the power that medium acts on the sealing surface increases, make the circumferentia of soft seal pad and the surface of contact of spool, touch the face contact that constantly broadens after the distortion of soft seal pad, reach seal request and change seal pressure by initial top line.The inside and outside circle of this soft seal pad is tightly pushed down by cover, valve core housing in the valve seat simultaneously, after given high pressure lower valve core is opened, adsorption force when medium is released can not pulled out the soft seal pad, when returning seat, along with inertial force increases, soft seal pad sealing contact surface has reduced the seal pressure of sealing part owing to be out of shape the corresponding increase of meeting, can not tear the sealing ring face, improve the working life of soft seal pad greatly.
2. the groove of spool bottom processing defines the maximum compressibility of soft seal anchor ring, the circular groove that the spool external cylindrical surface is left has reduced the friction fit face of spool and valve core housing, reduce the frictional force that spool moves, spool lower end and soft seal pad surface of contact build-up wear-resistant corrosion resistant alloy have satisfied under the high pressure that this valve anti-ly washes away, wear-resistant, corrosion resistant requirement.
3. spool lower end surface and the soft seal pad top cross section of protruding is that the circumferentia of circular arc contact the formation sealing pair, because spool upper end area contacts the area of anchor ring greater than lower end and soft seal pad, when spool is closed, act on the spring force of spool upper end and medium power greater than the medium power on the lower end sealing anchor ring, surpass the seal pressure of soft seal cushion material, reached and closed sealing " zero leakage " requirement.Simultaneously, 0 shape seal ring is set on Transverse plane on the valve seat, the lower plane of soft seal pad and the issuable air-flow path of valve seat upper end interplanar are also blocked fully, further increased the reliability of sealing.
4. the set upper side step surface is higher than the circumferentia on soft seal pad top in the valve seat after compressing the soft seal pad, makes spool medium after unlatching can directly not wash away soft seal pad sealing surface; Be higher than plane on the soft seal pad and open the bleeder port lower end position in the middle part of the valve core housing, open at spool and to leave the moment of sealing anchor ring to the valve core housing bleeder port, gas medium pressure cover aperture in the valve seat moves to the valve core housing bleeder port, because soft seal pad circular arc circumferentia has with a certain distance from valve core housing bleeder port lower end, thereby reduced the adsorption force of moment, prolonged the working life of soft seal pad the soft seal pad.
5. conventional security valve soft sealing material all is embedded in the spool bottom, and soft sealing material was directly washed away by medium when pressure medium was released in the spool unlatching influences working life; And the soft sealing material of sealing auxiliary structure is embedded in above the valve seat, directly washes away spool bottom hard alloy overlay welding sealing surface when releasing pressure medium, has improved the high-pressure medium job requirement of releasing greatly, has further prolonged valve working life.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the user mode figure that the utility model is applied to high pressure Pilot operated safety valve main valve.
Label is respectively in the accompanying drawing: 1-spring, 2-valve core housing, 3-O shape seal ring, the 4-spool, 5-soft seal pad, 6-valve seat, 7-O shape seal ring, 8-O shape seal ring, 9-locking nut, cover in the 10-valve seat, 11-PRESSURE PIPE, 12-pilot valve, the 13-valve gap, 14-valve body, A-sealing configuration, the B-suction port, the C-bleed outlet.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 illustrates high pressure Pilot operated safety valve main valve sealing configuration situation, is made up of cover 10 and O-ring seals in spring 1, valve core housing 2, spool 4, soft seal pad 5, valve seat 6, locking nut 9, the valve seat.Soft seal pad 5 snaps in valve seat 6 tops that O-ring seals 7 is housed, and its O-ring seals 7 is blocked the lower plane of soft seal pad 5 and the issuable air-flow path of valve seat 6 upper end interplanars fully, further increases the reliability of sealing.Cover 10 is inserted in O-ring seals 8 and screws in valve seat 6 internal threads in the valve seat, and its upper end step compresses soft seal pad 5, screws with locking nut 9 to be integral in the valve body 14 that is assembled in main valve.Pack in the lump behind valve core housing 2 endoporus assemblings spool 4, O-ring seals 3 and the spring 1 in the valve body 14 of main valve, compress soft seal pad 5 cylindricals with the lower end step.The boss of the conical surface is made in spool 4 lower ends, can stretch into the endoporus of cover 10 in the valve seat, circumference at conical surface boss is processed with groove, to limit the decrement of soft seal pad 5 anchor rings, the external cylindrical surface of spool 4 has the twice circular groove, reducing the friction fit face of spool 4 and valve core housing 2, spool 4 lower ends and soft seal pad 5 surface of contact build-up wear-resistant corrosion resistant alloys have satisfied under the high pressure that this valve anti-ly washes away, wear-resistant, corrosion resistant requirement.
The cross section that protrude on spool 4 lower end surfaces and soft seal pad 5 tops is that the circumferentia of circular arc contact the formation sealing pair, spool 4 upper end areas contact the area of anchor ring greater than lower end and soft seal pad 5, when spool 4 is closed, act on the spring force of spool upper end and medium power greater than the medium power on the lower end sealing anchor ring, surpass the seal pressure of soft seal cushion material, reach and close sealing " zero leakage " requirement.
It is the circumferentia of circular arc that the cross section is protruded on soft seal pad 5 tops, make spool 4 contact increase with this circumferentia with setting pressure rising sealing force, touch the face contact that constantly broadens after the soft seal distortion and change seal pressure and reach seal request by initial top line, these soft seal pad 5 inside and outside circles are overlapped 10 in the valve seat simultaneously, valve core housing 2 tightly pushes down, after given high pressure lower valve core 4 was opened, the adsorption force when medium is released can not pulled out soft seal pad 5.Cover 10 upper end step faces are higher than the circumferentia on soft seal pad 5 tops in the valve seat, make spool 4 medium after unlatching can directly not wash away the sealing surface of soft seal pad 5, and valve core housing 2 middle part bleeder port lower end positions are higher than plane on the soft seal pad 5, open at spool and to leave the moment of sealing anchor ring to valve core housing bleeder port lower edge, gas medium pressure cover 10 apertures in the valve seat move to valve core housing 2 bleeder ports, because soft seal pad 5 circular arc circumferentias have with a certain distance from valve core housing 2 bleeder port lower ends, the gas pressure that release in cover 10 apertures in the valve seat is owing to soft seal pad 5 upper flow Volume Changes diminish pressure, thereby reduced the adsorption force of the moment of spool 4 unlatchings, prolonged the working life of soft seal pad 5 soft seal pad 5.
Fig. 2 illustrates the example that the utility model is applied to high pressure Pilot operated safety valve main valve.It mainly is made up of valve body 14, valve gap 13, PRESSURE PIPE 11, pilot valve 12 and this sealing configuration A.This seal structural part is assembled in the middle and upper part of valve body 14, pilot valve 12 links to each other with valve gap 13 with valve body 14 respectively by PRESSURE PIPE 11, top is connected with the closed air chamber that spool 4 upper-end surfaces, valve core housing 2 inner chambers, valve gap 13 inner chambers form, and the surface of contact of spool 4 upper-end surfaces and valve core housing 2 inner chamber upper step is the total travel confined planes of spool 4.The cross section that protrude with soft seal pad 5 tops under medium power and spring force effect spool 4 lower end surfaces is that the circumferentia of circular arc contact the formation sealing pair.
Several working staties at model utility describe below:
1) closed condition: pressure medium enters the closed air chamber that pilot valve 12 and valve gap 13 inner chambers and spool 4 upper-end surfaces form at valve body of main valve 14 suction flanges by PRESSURE PIPE 11, under spring 1 pretightening force effect, because spool 4 upper end areas are greater than the lower end sealing area, the circumferentia that makes spool 4 lower end surfaces be close to soft seal pad 5 forms sealing pair, satisfies the requirement of sealing " zero leakage " when closing.
2) superpressure emissions status: when pipe medium pressure is increased to setting pressure, pilot valve 12 is opened, gas in the closed air chamber that spool 4 upper-end surfaces and valve gap 13 inner chambers form is discharged from pilot valve 12 relief openings rapidly, make that gas pressure descends rapidly in the air chamber, act on medium power on the spool 4 lower end sealing surfaces greater than upper end medium power and spring force this moment, spool 4 moves to total travel on fast, and main valve gas is disposed to bleed outlet C pressure release from valve core housing 2 bleeder ports.
3) return a seat state: when pipe medium pressure is reduced to certain limit with the unlatching of valve discharging, 12 times seats of pilot valve are closed, suction port B gas raises pressure by the closed air chamber that PRESSURE PIPE 11 enters valve gap 13 rapidly, this moment spring force and medium power effect lower valve core 4 move down rapidly and close, main valve is closed thereupon.
Claims (3)
1, a kind of high pressure Pilot operated safety valve main valve sealing configuration comprises valve core housing, spool, spring, valve seat, soft seal pad and O-ring seals composition, it is characterized in that:
A, soft seal pad are located at the valve seat upper end, and Transverse plane is provided with O-ring seals on the valve seat, and is provided with boss so that the soft seal pad snaps in, and flexible the mistake in the screw-thread fit valve seat overlapped in the valve seat, and the upper end step of cover compresses the soft seal pad in the valve seat;
B, spool lower end become conical surface boss, are processed with groove at the circumference of conical surface boss, and the spool external cylindrical surface has circular groove;
C, valve core housing are the stepped shape endoporus, and its lower end step compresses soft seal pad cylindrical, and the surface of contact of spool upper-end surface and valve core housing upper step is the total travel confined planes of spool, and the valve core housing middle part has bleeder port.
2, high pressure Pilot operated safety valve main valve sealing configuration according to claim 1 is characterized in that it is the circumferentia of circular arc that the cross section is protruded on described soft seal pad top.
3. high pressure Pilot operated safety valve main valve sealing configuration according to claim 1 and 2 is characterized in that the set upper side step surface is higher than the circumferentia on soft seal pad top in the valve seat after compressing the soft seal pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820063349XU CN201202859Y (en) | 2008-05-08 | 2008-05-08 | Main valve seal structure of high pressure leading safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820063349XU CN201202859Y (en) | 2008-05-08 | 2008-05-08 | Main valve seal structure of high pressure leading safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201202859Y true CN201202859Y (en) | 2009-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820063349XU Expired - Lifetime CN201202859Y (en) | 2008-05-08 | 2008-05-08 | Main valve seal structure of high pressure leading safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201202859Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818818A (en) * | 2010-04-26 | 2010-09-01 | 浙江盾安禾田金属有限公司 | Valve core component of pilot valve and stepped direct-acting electromagnetic valve |
| CN102425690A (en) * | 2011-09-26 | 2012-04-25 | 西安热工研究院有限公司 | Water vapor sampling equipment overflow valve provided with novel seal structure |
| CN102539281A (en) * | 2010-12-27 | 2012-07-04 | 上海乐研电气科技有限公司 | A closed instrument filled with gas or liquid |
| CN103234052A (en) * | 2013-04-26 | 2013-08-07 | 无锡龙山科技有限公司 | Two-position two-way switching valve |
| CN104712845A (en) * | 2013-11-01 | 2015-06-17 | 艾默生过程管理调节技术公司 | Mechanically retained valve seat |
| CN105090543A (en) * | 2014-04-26 | 2015-11-25 | 费希尔久安输配设备(成都)有限公司 | Protection assembly of valve seat sealing pad and pressure regulation device |
| CN106015715A (en) * | 2016-07-25 | 2016-10-12 | 金华市宏昌电器有限公司 | Hydraulic control device |
| CN107178637B (en) * | 2017-07-27 | 2018-08-31 | 眉山中车制动科技股份有限公司 | A kind of safety valve with dual-seal function |
| CN111379873A (en) * | 2018-12-28 | 2020-07-07 | 浙江三花制冷集团有限公司 | a flow control valve |
| CN111379889A (en) * | 2018-12-28 | 2020-07-07 | 浙江三花制冷集团有限公司 | Flow control valve and method of assembling the same |
| CN111720596A (en) * | 2020-07-27 | 2020-09-29 | 江苏神通阀门股份有限公司 | A high temperature explosion relief valve |
| CN111981168A (en) * | 2020-08-31 | 2020-11-24 | 四川长仪油气集输设备股份有限公司 | Pilot operated safety valve |
| CN112483279A (en) * | 2020-11-30 | 2021-03-12 | 湖北航天技术研究院总体设计所 | Rocket engine valve |
| CN113227625A (en) * | 2019-01-15 | 2021-08-06 | 阿尔弗雷多·平达迪 | Check valve operated by a lever of a first kind connected to a pair of floats, one of which is ballasted |
| WO2022007589A1 (en) * | 2020-07-09 | 2022-01-13 | 浙江三花制冷集团有限公司 | Electric valve and method for assembling same |
-
2008
- 2008-05-08 CN CNU200820063349XU patent/CN201202859Y/en not_active Expired - Lifetime
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818818A (en) * | 2010-04-26 | 2010-09-01 | 浙江盾安禾田金属有限公司 | Valve core component of pilot valve and stepped direct-acting electromagnetic valve |
| CN102539281A (en) * | 2010-12-27 | 2012-07-04 | 上海乐研电气科技有限公司 | A closed instrument filled with gas or liquid |
| CN102425690A (en) * | 2011-09-26 | 2012-04-25 | 西安热工研究院有限公司 | Water vapor sampling equipment overflow valve provided with novel seal structure |
| CN103234052A (en) * | 2013-04-26 | 2013-08-07 | 无锡龙山科技有限公司 | Two-position two-way switching valve |
| CN104712845B (en) * | 2013-11-01 | 2019-06-14 | 艾默生过程管理调节技术公司 | Controls and Sealed Disc Mounting Assembly for Regulators |
| CN104712845A (en) * | 2013-11-01 | 2015-06-17 | 艾默生过程管理调节技术公司 | Mechanically retained valve seat |
| CN105090543A (en) * | 2014-04-26 | 2015-11-25 | 费希尔久安输配设备(成都)有限公司 | Protection assembly of valve seat sealing pad and pressure regulation device |
| CN106015715B (en) * | 2016-07-25 | 2018-07-17 | 金华市宏昌电器有限公司 | A kind of Waterpower control device |
| CN106015715A (en) * | 2016-07-25 | 2016-10-12 | 金华市宏昌电器有限公司 | Hydraulic control device |
| CN107178637B (en) * | 2017-07-27 | 2018-08-31 | 眉山中车制动科技股份有限公司 | A kind of safety valve with dual-seal function |
| WO2019019523A1 (en) * | 2017-07-27 | 2019-01-31 | 眉山中车制动科技股份有限公司 | Safety valve having double-sealing function |
| CN111379873A (en) * | 2018-12-28 | 2020-07-07 | 浙江三花制冷集团有限公司 | a flow control valve |
| CN111379889A (en) * | 2018-12-28 | 2020-07-07 | 浙江三花制冷集团有限公司 | Flow control valve and method of assembling the same |
| CN111379873B (en) * | 2018-12-28 | 2022-07-29 | 浙江三花制冷集团有限公司 | a flow control valve |
| CN111379889B (en) * | 2018-12-28 | 2022-07-12 | 浙江三花制冷集团有限公司 | Flow control valve and method of assembling the same |
| CN113227625A (en) * | 2019-01-15 | 2021-08-06 | 阿尔弗雷多·平达迪 | Check valve operated by a lever of a first kind connected to a pair of floats, one of which is ballasted |
| WO2022007589A1 (en) * | 2020-07-09 | 2022-01-13 | 浙江三花制冷集团有限公司 | Electric valve and method for assembling same |
| CN111720596A (en) * | 2020-07-27 | 2020-09-29 | 江苏神通阀门股份有限公司 | A high temperature explosion relief valve |
| CN111981168A (en) * | 2020-08-31 | 2020-11-24 | 四川长仪油气集输设备股份有限公司 | Pilot operated safety valve |
| CN112483279A (en) * | 2020-11-30 | 2021-03-12 | 湖北航天技术研究院总体设计所 | Rocket engine valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Leshan Changyi Valve Manufacturing Co., Ltd. Assignor: Wang Yuanqing|Wang Yuanyi Contract record no.: 2011510000228 Denomination of utility model: Main valve seal structure of high pressure leading safety valve Granted publication date: 20090304 License type: Exclusive License Record date: 20110828 |
|
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN CHANGYI OIL-GAS GATHERING TRANSPORTAION EQ Free format text: FORMER OWNER: WANG YUANQING Effective date: 20140327 Free format text: FORMER OWNER: WANG YUANYI Effective date: 20140327 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140327 Address after: 614000 Leshan City, Central District, Sichuan Le Lok Road, No. 16 Patentee after: SICHUAN CHANGYI OIL-GAS CATHERING TRANSPORTATION EQUIPMENT CO., LTD. Address before: 614000, Sichuan Province, Leshan Province, cotton and Bamboo Development Zone, Lok Chi Road, No. 16 Patentee before: Wang Yuanqing Patentee before: Wang Yuanyi |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090304 |
|
| CX01 | Expiry of patent term |