CN1183346C - Normal open guiding type safety valve combined with blasting sheet - Google Patents
Normal open guiding type safety valve combined with blasting sheet Download PDFInfo
- Publication number
- CN1183346C CN1183346C CNB021446377A CN02144637A CN1183346C CN 1183346 C CN1183346 C CN 1183346C CN B021446377 A CNB021446377 A CN B021446377A CN 02144637 A CN02144637 A CN 02144637A CN 1183346 C CN1183346 C CN 1183346C
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- Prior art keywords
- valve
- pilot valve
- pilot
- big
- flap
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- Expired - Lifetime
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- 238000005422 blasting Methods 0.000 title abstract 3
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 230000008676 import Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 239000012429 reaction media Substances 0.000 abstract description 12
- 238000007599 discharging Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The present invention relates to a normally open pilot type safety valve which is combined with blasting sheets, which belongs to the field of safety devices. The normally open pilot type safety valve is composed of a main valve and a pilot valve, wherein the main valve is fixed on a lower valve body, and the pilot valve is fixed on an upper valve body. An inner cavity which is a cylinder body of which the upper bottom surface and the lower bottom surface of a cylinder are provided with outlets is fixed on the lower valve body. A piston is formed by the series connection of two cylinders, the upper segment of the piston divides the cylinder body in a transversal direction in the cylinder body, and the lower segment passes through the bottom surface of the cylinder body and is fixedly connected with a main valve clack. A spring which is in the cylinder body pulls the piston to enable the main valve to be in an open state. The side wall of an inlet of a main valve seat is provided with a medium passage which is communicated with a gas inlet passage of the pilot valve. The pilot valve is also provided with a small gas exhaust passage for the pilot valve and a big gas exhaust passage for the pilot valve. When pressure is very high, the small gas exhaust passage for the pilot valve does not exhaust gas, when the pressure is reduced to a definite degree, the small gas exhaust passage for the pilot valve exhausts gas to an air chamber above the piston in the cylinder body. Because the main valve is in an open state at the beginning, when pressure is raised suddenly, gas can be exhausted in time; meanwhile, the safety valve can be reset in time, so most of reaction media can be reserved. An inlet and an outlet of the main valve are provided with blasting sheets, so the sealing performance of the safety valve can be ensured.
Description
Affiliated technical field
The invention belongs to security appliance field, specifically be used for reactor with the rupture disk combination often open Pilot operated safety valve.
Background technique
It is the safety prevention measure commonly used that prevents reactor internal reaction medium superpressure that rupture disk and safety valve are set on reactor.Characteristics such as rupture disk is swift in response when having little, the rapid superpressure of inertia, airtight performance is good, if but reactor only is provided with rupture disk, and after the medium superpressure, reaction medium will all be discharged, and waste valuable reaction medium in the reactor, the while befouling environment.Reset again behind the safety valve jumping up, can keep most of reaction medium, but effect of inertia owing to safety valve inner spring, flap etc., not really timely to the response that the medium in the reaction boosts rapidly, the spring that particularly acts on flap top plays very big damping function to opening rapidly of flap, when reaction medium boosts fast, easily cause safety valve being higher than the cracking pressure discharging of setting, unfavorable to device ' on the contrary.In addition, the safety valve sealability is not good, influences it yet and uses safely being equipped with on the reactor of inflammable, explosive medium.Rupture disk and safety valve are installed in series on reactor, rupture disk is installed in the ingress of safety valve, can improve the sealability of safety valve and prevent that rupture disk from discharging medium fully, but safety valve is in normally off, after rupture disk throws open, the effect of inertia of safety valve medi-spring, flap etc. still exists, and the untimely pressure of equipment internal reaction medium that still may make of safety valve response continues to raise.
Summary of the invention
The objective of the invention is to solve slow, the poor sealing performance of existing safety valve action response, make material discharge the valuable medium of waste, the defective of befouling environment fully behind the valve opening.
The technological scheme that the present invention is proposed for its technical problem of solution is: what the combination of a kind of and rupture disk was provided often opens Pilot operated safety valve, by following valve body, upper valve body is formed, and following valve body is dismountable fixedlying connected with upper valve body, and upper and lower valve body is used for fixing the safety valve internals.Main valve seat is fixed on down on the valve body.Pilot valve is fixed on the upper valve body.The cylinder body that is fixed on down on the valve body is that inner chamber is a cylindrical body, and there is the cylinder body of round exit upper and lower bottom surface.Piston is that the cylindrical body serial connection of two different-diameters forms for one, on the piston in cylinder body inner chamber, the lower end of horizontal partition cylinder body pass the cylinder body bottom surface and fixedly connected with the flap assembly.Be sealing and flexible connection that can be vertically between piston and the cylinder body.The flap assembly is relative with valve seat.Main spool spring is in cylinder body, and two ends are separately fixed on piston and the cylinder body.Fix a rupture disk in the main valve ingress.Have the main valve seat medium channel on the sidewall of the main valve seat of main valve import rupture disk back, the main valve seat medium channel is communicated with the pilot valve gas-entered passageway by the pipeline connected system.Pilot valve has a pilot valve gas-entered passageway, a little exhaust passage of pilot valve and the big exhaust passage of pilot valve.The big exhaust passage of pilot valve is communicated with the main valve exhaust passage.The import of cylinder body upper bottom surface is led in the little exhaust passage of pilot valve.When pressure is very high, the little not exhaust of exhaust passage of pilot valve, pressure is reduced to the to a certain degree back little exhaust passage of pilot valve exhaust in the cylinder body of main valve.Pilot valve is by pilot valve seat, the little flap of pilot valve, and the pilot valve big valve flap, pilot valve minor adjustment nut, the big Adjusting bolt Adjusting screw of pilot valve, the pilot valve little spring, pilot valve big spring pilot valve spool is formed.Pilot valve seat is fixed on the upper valve body, and the outer surface and the upper valve body of the big Adjusting bolt Adjusting screw of pilot valve spin.The pilot valve big valve flap has medium channel, and top is hollow cylinder, one end of the medium channel of pilot valve big valve flap is communicated with the pilot valve gas-entered passageway, and the other end is communicated with the inner chamber of its top hollow cylinder, and the pilot valve big valve flap is connected with the big Adjusting bolt Adjusting screw of pilot valve by the pilot valve big spring.The big Adjusting bolt Adjusting screw of pilot valve minor adjustment nut and pilot valve spins.The little flap of pilot valve is connected with pilot valve minor adjustment nut by the pilot valve little spring.The pilot valve spool is between pilot valve big valve flap and the little flap of pilot valve, and form for one for two hollow cylinders serial connection of different-diameter, the big Adjusting bolt Adjusting screw inwall of wherein large diameter outer surface and pilot valve spins, be small end and top closure and on sidewall, have medium channel that near pilot valve big valve flap end the pilot valve spool is communicated with the medium channel of pilot valve big valve flap with the gas-entered passageway of the little flap of pilot valve.For the longitudinal sliding motion that contains seal ring is connected, pilot valve spool end sealing face sealed the medium channel of pilot valve big valve flap when the pilot valve big valve flap was opened between pilot valve big valve flap and the pilot valve spool.The exhaust cavity of pilot valve big valve flap control is in communication with the outside by the big exhaust passage of pilot valve, and simultaneously, the big exhaust passage of pilot valve also is communicated with the little flap gas-entered passageway of pilot valve with the little exhaust passage of pilot valve when the little flap of pilot valve is opened.The little exhaust passage of pilot valve is communicated with the little flap gas-entered passageway of pilot valve, and leads to the above air cavity of piston in the cylinder body.The outlet port of main valve is fixing main valve outlet rupture disk also.The pipeline connected system can above serial connection one pressure gauge.The lower end of piston can be a hollow cylinder.The upper end of flap assembly can and be passed the cylinder body bottom surface for solid or hollow cylinder and fixedlys connected with piston, and the surface of contact of flap assembly and cylinder body has seal ring.Cylinder body can be dismountable fixedlying connected with valve body, also can make one with following valve body or upper valve body.Between the sidewall of cylinder body and two bottom surfaces can be dismountable fixedlying connected, and also can make one.Cylinder body can be fixed between upper valve body or upper valve body and the following valve body.
The invention has the beneficial effects as follows that because main valve is initially located in opening state, when pressure raise suddenly, gas can in time discharge, simultaneously, safety valve can in time reset, and can keep most of reaction medium.Promptly when guaranteeing reactor safety, save reaction medium, avoid environmental pollution.Rupture disk is installed in import at main valve everywhere, can guarantee the sealing of safety valve, simultaneously, can in time find the pressurized container superpressure.In the main valve outlet port rupture disk is installed and is prevented that external dust from entering in the main valve.
Description of drawings
Fig. 1 is the structural representation of often opening Pilot operated safety valve that makes up with rupture disk.
Fig. 2 be with rupture disk combination often open pilot valve structural representation in the Pilot operated safety valve.
1. times valve bodies, 2. upper valve body, 3. main valve seat among the figure, 4. flap assembly, 5. cylinder body, 6. piston, 7. import rupture disk, 8. main valve seat medium channel, 9. pipeline connected system, 10. pilot valve gas-entered passageway, 11. pilot valve seat, 12. pilot valve big valve flaps, 13. pilot valve spool, 14. the little exhaust passage of pilot valve, the big Adjusting bolt Adjusting screw of 15. pilot valves, 16. pilot valve little springs, 17. pilot valve big spring, 18. the big exhaust passage of pilot valve, 19. main spool springs, the little flap of 20. pilot valves, 21. pilot valve pipeline connected system, 22. pilot valve minor adjustment nut, 23. pilot valves, 24. main valves outlet rupture disk.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
When not explosion of rupture disk 7, flap assembly 4 is in opening state.Pressure gauge is designated as zero, when rupture disk 7 explosions, medium one tunnel discharges through main valve, another road enters pilot valve gas-entered passageway 10 through pipeline connected system 9, and pilot valve big valve flap 12 is opened, and the clearance seal between pilot valve big valve flap 12 and the pilot valve spool 13, the big exhaust passage 18 of pilot valve is in communication with the outside, this moment, the air cavity on main valve piston 6 tops did not enter reaction medium, guaranteed that the opening state of main valve clack assembly 4 remains unchanged.
When the pressure of reaction medium is lower than the Reseating pressure of a safety valve of the pilot valve big valve flap of being set up by pilot valve big valve flap Adjusting bolt Adjusting screw 15 12,12 times seats of pilot valve big valve flap, open in gap between pilot valve big valve flap 12 and the pilot valve spool 13, medium enters the air cavity on main valve piston 6 tops by the little exhaust passage 14 of pilot valve, main valve flap assembly 4 to main valve seat 3 closures, is realized the sealing of main valve under the driving of main valve piston 6.
When pressure medium is higher than the cracking pressure of the little flap 20 of pilot valve that the little flap adjusting nut of pilot valve 22 sets up once more, the little flap 20 of pilot valve is opened, the cavity dielectric on main valve piston 6 tops is by pilot valve big exhaust passage 18 dischargings, pressure when piston 6 tops reduces, main spool spring 19 drives piston 6 and flap assembly 4 leaves main valve seat 3, and medium discharges by main valve once more; Simultaneously, because the cracking pressure of the little flap 20 of pilot valve is less than or equal in the unlatching of pilot valve big valve flap 12, when the little flap 20 of pilot valve is opened, pilot valve big valve flap 12 or is simultaneously opened, make the gap-closing between pilot valve big valve flap 12 and the pilot valve spool 13, medium in the pilot valve gas-entered passageway 10 can not enter the little exhaust passage 14 of pilot valve through pilot valve big exhaust passage 18 dischargings.When reaction medium pressure is lower than the Reseating pressure of a safety valve of the pilot valve big valve flap of being set up by pilot valve big valve flap Adjusting bolt Adjusting screw 15 12,12 times seats of pilot valve big valve flap, open in gap between pilot valve big valve flap 12 and the pilot valve spool 13, at this moment, because the little flap 20 of pilot valve has returned seat, medium enters the air cavity on main valve piston 6 tops once more by the little exhaust passage 14 of pilot valve, main valve flap assembly 4 under the driving of piston 6 with main valve seat 3 closures, realize the sealing of main valve.
Claims (9)
- With rupture disk combination often open Pilot operated safety valve, by following valve body (1), upper valve body (2) is formed, following valve body (1) is dismountable fixedlying connected with upper valve body (2), upper and lower valve body is used for fixing the safety valve internals, main valve seat (3) is fixed on down on the valve body (1), and pilot valve (23) is fixed on the upper valve body (2); It is characterized in that the cylinder body (5) that is fixed on down on the valve body (1) is a cylindrical body for inner chamber, there is the cylinder body of round exit upper and lower bottom surface; Piston (6) is that the cylindrical body serial connection of two different-diameters forms for one, on the piston (6) in cylinder body (5) inner chamber, the lower end of horizontal partition cylinder body (5) pass cylinder body (5) bottom surface and fixedly connected with flap assembly (4); Be sealing and flexible connection that can be vertically between piston (6) and the cylinder body (5); Flap assembly (4) is relative with valve seat (3); Main spool spring (19) two ends in cylinder body (5) are separately fixed on piston (6) and the cylinder body (5); Fix a rupture disk (7) in the main valve ingress, have main valve seat medium channel (8) on the sidewall of the main valve seat (3) of rupture disk (7) back, main valve seat medium channel (8) is communicated with pilot valve gas-entered passageway (10) by pipeline connected system (9); Pilot valve (23) has a pilot valve gas-entered passageway (10), a little exhaust passage of pilot valve (14) and a big exhaust passage of pilot valve (18); The big exhaust passage of pilot valve (18) is communicated with the main valve exhaust passage; Cylinder body (5) upper bottom surface import is led in the little exhaust passage of pilot valve (14); When pressure is very high, not exhaust of the little exhaust passage of pilot valve (14), pressure is reduced to the to a certain degree back little exhaust passage of pilot valve (14) exhaust in cylinder body (5).
- 2. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that, pilot valve (23) is by pilot valve seat (11), the little flap of pilot valve (20), pilot valve big valve flap (12), pilot valve minor adjustment nut (22), the big Adjusting bolt Adjusting screw of pilot valve (15), pilot valve little spring (16), pilot valve big spring (17) pilot valve spool (13) is formed; Pilot valve seat (11) is fixed on the upper valve body, and the outer surface of the big Adjusting bolt Adjusting screw of pilot valve (15) and upper valve body (2) spin; Pilot valve big valve flap (12) has medium channel, and top is hollow cylinder, one end of medium channel is communicated with pilot valve gas-entered passageway (10), and the other end is communicated with the inner chamber of its top hollow cylinder, and pilot valve big valve flap (12) is connected with the big Adjusting bolt Adjusting screw of pilot valve (15) by pilot valve big spring (17); Pilot valve minor adjustment nut (22) spins with the big Adjusting bolt Adjusting screw of pilot valve (15); The little flap of pilot valve (20) is connected with pilot valve minor adjustment nut (22) by pilot valve little spring (16); Pilot valve spool (13) is between pilot valve big valve flap (12) and the little flap of pilot valve (20), and form for one for two hollow cylinders serial connection of different-diameter, the big Adjusting bolt Adjusting screw inwall of the top of pilot valve spool and pilot valve spins, another part is in the hollow cylinder of pilot valve big valve flap (12) top, for small end and top closure and have medium channel on sidewall, pilot valve spool (13) is communicated with the medium channel of pilot valve big valve flap pilot valve spool (13) with the gas-entered passageway of the little flap of pilot valve (20) near pilot valve big valve flap (12) end; Be connected for the longitudinal sliding motion that contains seal ring between pilot valve big valve flap (12) and the pilot valve spool (13), pilot valve spool (13) end sealing face was with the medium channel sealing of pilot valve big valve flap (12) when pilot valve big valve flap (12) was opened, the exhaust cavity of pilot valve big valve flap (12) control is in communication with the outside by the big exhaust passage of pilot valve (18), simultaneously, the big exhaust passage of pilot valve (18) also are communicated with the little flap of pilot valve (20) gas-entered passageway with the little exhaust passage of pilot valve (14) by pilot valve pipeline connected system (21) when the little flap of pilot valve (20) is opened; The little exhaust passage of pilot valve (14) is communicated with the little flap of pilot valve (20) gas-entered passageway, and leads to the above air cavity of piston (6) in the cylinder body (5).
- 3. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that the outlet port of main valve fixedly main valve exports rupture disk (24).
- 4. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that pipeline connected system (9) is gone up serial connection one pressure gauge.
- 5. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that the lower end of piston (6) can be a hollow cylinder.
- 6. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that, the upper end of flap assembly (4) is solid or hollow cylinder, can pass cylinder body (5) bottom surface and fixedly connected with piston (6), and flap assembly (4) has seal ring with the surface of contact of cylinder body (5).
- 7. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that cylinder body (5) can be dismountable fixedlying connected with valve body, also can make one with following valve body (1) or upper valve body (2).
- 8. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that, can be dismountable fixedlying connected between the sidewall of cylinder body (5) and two bottom surfaces, also can make one.
- 9. the combination of according to claim 1 and rupture disk often open Pilot operated safety valve, it is characterized in that cylinder body (5) can be fixed between upper valve body (2) or upper valve body (2) and the following valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021446377A CN1183346C (en) | 2002-11-26 | 2002-11-26 | Normal open guiding type safety valve combined with blasting sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021446377A CN1183346C (en) | 2002-11-26 | 2002-11-26 | Normal open guiding type safety valve combined with blasting sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414273A CN1414273A (en) | 2003-04-30 |
| CN1183346C true CN1183346C (en) | 2005-01-05 |
Family
ID=4750617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021446377A Expired - Lifetime CN1183346C (en) | 2002-11-26 | 2002-11-26 | Normal open guiding type safety valve combined with blasting sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183346C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537443A (en) * | 2010-12-14 | 2012-07-04 | 海洋王照明科技股份有限公司 | Safety valve of telescopic cylinder |
| CN102937200A (en) * | 2012-11-19 | 2013-02-20 | 福建高中压阀门科技有限公司 | Direct-flow piston type adjustable pressure release valve and use method thereof |
| RS58789B1 (en) * | 2013-08-12 | 2019-07-31 | Sodastream Ind Ltd | Burst disk protected valve |
| CN103821982B (en) * | 2014-03-06 | 2016-03-16 | 北京航空航天大学 | Pressure regulator valve |
| RU2603211C2 (en) * | 2015-02-19 | 2016-11-27 | Закрытое акционерное общество "Научно-производственная фирма "Центральное конструкторское бюро арматуростроения" | Pulse safety device |
| CN106195372B (en) * | 2016-08-31 | 2019-04-23 | 北京中瑞和电气有限公司 | Pressure relief device, control method and oil-filled equipment explosion-proof fire-extinguishing protect system |
| WO2022110533A1 (en) * | 2020-11-26 | 2022-06-02 | 皑壹智能汽车科技(嘉兴)有限公司 | Sealing structure of valve body, valve and cflvv valve |
| CN113389933B (en) * | 2021-07-29 | 2022-08-09 | 四川长仪油气集输设备股份有限公司 | Multifunctional pilot operated safety valve |
| CN114165630B (en) * | 2021-12-08 | 2023-04-07 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
-
2002
- 2002-11-26 CN CNB021446377A patent/CN1183346C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1414273A (en) | 2003-04-30 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN POLYTECHNIC UNIVERSITY, THE LEADING GROUP Free format text: FORMER OWNER: DALIAN UNIVERSITY OF TECHNOLOGY Effective date: 20080215 Owner name: DALIAN POLYTECHNIC SAFETY EQUIPMENT CO. Free format text: FORMER OWNER: DALIAN POLYTECHNIC UNIVERSITY, THE LEADING GROUP CO.LTD. Effective date: 20080215 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080215 Address after: No. 2, Ling Gong Road, Ganjingzi District, Liaoning, Dalian Province, China: 116023 Patentee after: Dalian University of Technology Leading Group Ltd. Address before: No. 2, Ling Gong Road, Ganjingzi District, Liaoning, Dalian Province, China: 116024 Patentee before: Dalian University of Technology Effective date of registration: 20080215 Address after: No. 26, Liaohe East Road, Shuang D port, Dalian hi tech Industrial Park, Liaoning Province: 116620 Patentee after: DALIAN LIGONG SAFETY EQUIPMENT Co.,Ltd. Address before: No. 2, Ling Gong Road, Ganjingzi District, Liaoning, Dalian Province, China: 116023 Patentee before: Dalian University of Technology Leading Group Ltd. |
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| CP03 | Change of name, title or address |
Address after: 116620 No. 26, Liaohe East Road, Shuang D port, Dalian economic and Technological Development Zone, Liaoning Patentee after: Dalian Duda technology Safety System Co.,Ltd. Address before: 116620, Dalian hi tech Industrial Park, Liaoning Province, No. 26, Liaohe East Road, D port Patentee before: DALIAN LIGONG SAFETY EQUIPMENT Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20050105 |
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| CX01 | Expiry of patent term |