CN2078836U - Leading safety valve for pressure containers - Google Patents
Leading safety valve for pressure containers Download PDFInfo
- Publication number
- CN2078836U CN2078836U CN 90220716 CN90220716U CN2078836U CN 2078836 U CN2078836 U CN 2078836U CN 90220716 CN90220716 CN 90220716 CN 90220716 U CN90220716 U CN 90220716U CN 2078836 U CN2078836 U CN 2078836U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- main valve
- chamber
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000009191 jumping Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 2
- 238000007789 sealing Methods 0.000 description 25
- 230000000694 effects Effects 0.000 description 11
- 238000004880 explosion Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a leading safety valve for pressure containers belonging to fluid machinery. The leading safety valve for pressure containers is used for safely discharging pressure when the overpressure phenomenon occurs in a fluid pressure system. The leading safety valve for pressure containers is composed of a main valve and a guiding valve. A bursting disc is arranged between the pressure chamber of the main valve (8) and the inlet side of the main valve (20) or the outlet side of the main valve (60). When the guiding valve is out of order, the bursting disc can be burst under a specified pressure. The pressure of the main valve is not more than the discharge pressure, and the main valve is opened to discharge pressure. The safety valve of the utility model has the advantages of a guide type safety valve that the action is sensitive, the seal is reliable, the differential pressure for on-off is small, etc. The utility model overcomes the disadvantage of the guide type safety valve that the reliability is poor. The utility model can be widely used for safely discharging pressure for pressure containers for chemical industry, petrochemical industry, chemistry, metallurgy, etc.
Description
The utility model is a kind of safety valve, belongs to fluid machinery, is used for the superpressure preventing safety relief of fluid-pressure system.
Widely used safety valve is the direct load formula of spring in producing at present, is characterized in reliable in action but poor sealing performance, and Blowdown of a safety valve is big.Another kind of safety valve is a leading type, is characterized in good seal performance, and Blowdown of a safety valve is little but reliable in action is poor.This is because this Pilot operated safety valve whether move to be determined by the action of two valves (main valve and pilot valve), and its reliability is descended greatly.For example " petrochemical equipment " rolled up the Pilot operated safety valve that the 2nd phase " the novel Pilot operated safety valve of pressurized container " one literary composition is introduced in 1988 17, if pilot valve is malfunctioning, because the sealing of main valve has the self-tightening effect, main valve just closes tight more under the pressure medium effect of main valve pressure chamber more, can't open, make it lose the function of overpressure relief.Therefore the relevant pressure container standard of China (as GB150-89 " Steel Pressure Vessels ") is clearly stipulated, does not allow to use this safety valve on pressurized container.Unless when pilot valve was malfunctioning, main valve still can be opened when being no more than relieving pressure automatically, and the superpressure medium is released away.
The purpose of this utility model is, designs a kind of Pilot operated safety valve that can be used for pressurized container, and even pilot valve is malfunctioning, and then main valve still can be opened when being no more than relieving pressure automatically, and the superpressure medium is released away.
Of the present utility model being constructed as follows:
A kind of Pilot operated safety valve, it is made up of main valve and pilot valve two-part.Main valve is provided with a pressure chamber, by this pressure chamber, pressure medium can be applied on the main valve plug with piston action, and an end of main valve plug is provided with flap.The switching motion of main valve is mainly controlled by the pressure medium in the main valve pressure chamber.The effect of pilot valve is exactly to control pressure medium in the main valve pressure chamber by its switching motion, thereby reaches the purpose by pilot valve control main valve events.Feature of the present utility model is that main valve is provided with rupture disk.If main valve is design like this, promptly when applying pressure medium for the main valve pressure chamber by pilot valve, main valve is just closed, and when the removal pressure medium, main valve is just opened, rupture disk then is set like this, the one side is communicated with the main valve pressure chamber, and opposite side and main valve outlet side (when main valve is provided with discharge pipe, refer to discharge pipe, when main valve is directly arranged to atmosphere, refer to atmosphere) be communicated with.Like this, just in case pilot valve is malfunctioning, pressure medium in can not the removal pressure chamber, then rupture disk can be in specified action pressure (being no more than the relieving pressure of safety valve) explosion down, the main valve pressure chamber is communicated with the main valve outlet side, so the main valve pressure chamber is pressure release rapidly just, main valve is opened rapidly immediately, begins to release.If main valve is design like this, when applying pressure medium for the main valve pressure chamber, just main valve is opened by pilot valve, when the removal pressure medium, main valve is just closed, and rupture disk then is set like this, the one side is communicated with the main valve inlet side, and opposite side is communicated with the main valve pressure chamber.Like this, just in case pilot valve is malfunctioning, can not apply pressure medium for the main valve pressure chamber, then rupture disk will explosion under specified action pressure, the main valve pressure chamber is communicated with the main valve inlet side, so pressurizeed rapidly in the main valve pressure chamber, main valve is opened rapidly immediately, begins to release.
Fig. 1 and Fig. 2 are embodiments of the present utility model, and Fig. 1 is the main valve of this Pilot operated safety valve, and Fig. 2 is the pilot valve of this safety valve.
In Fig. 1, an end of valve core of main valve (1) is linked to each other with the valve core head with piston action (3) by back of the body cap (2), and an end of valve body (4) is processed into a cylinder (5), and valve core head (3) can be endwisely slipped.Locate to be threaded in (7) with top cover (6) in the top of valve body (4).Like this, formed main valve pressure chamber (8) by valve core head (3), valve body (4) and top cover (6), seal element (9), (10) and (11) provide sealing for this pressure chamber.The other end of valve core of main valve (1) is processed into flap (12), and the seal element (16) on the valve seat (15) of sealing surface on it (13) and double as flange (14) can form sealing.Valve core of main valve (1) is provided with the passage (21) that is communicated with main valve inlet side (20) and main valve pressure chamber (8), rupture disk (18) is clamped on the flap (12) by gland (17), make a side of rupture disk (18) be communicated with main valve inlet side (20), opposite side is communicated with main valve pressure chamber (8).Orifice plate (22) is used for preventing the clogged with fragments passage (21) after rupture disk (18) explosion.By the flange (14) on the valve body (4) this safety valve is linked to each other with protected pressurized container (or equipment).Pressure medium can be released into the side of releasing (60) by the floss hole (23) at valve body (4) middle part.Fin (24) play the guiding role for valve core of main valve (1), and spring (25) provides initial sealing power for the sealing surface (13) on the flap (12) and the sealing between the seal element (16) on the valve seat (15).The passage (26) that is connected with main valve inlet side (20) is communicated with pilot valve inlet attack (30) among Fig. 2 by pipe joint (27).The passage (28) that is communicated with main valve pressure chamber (8) is communicated with pilot valve outlet connection (31) among Fig. 2 by pipeline.
In Fig. 2, guide's spool (32) is divided into three chambeies with the valve body of pilot valve (33); Hyperbaric chamber (34), control chamber (35) and pressure-releasing chamber (36).Hyperbaric chamber (34) is communicated with main valve inlet side (20) among Fig. 1, and control chamber (35) is communicated with main valve pressure chamber (8) among Fig. 1, and pressure-releasing chamber (36) is communicated with main valve outlet side (60) among Fig. 1.Pressure-releasing chamber (36) is formed by upper valve body (37) and guide's spool (32), and the cylinder of guide's spool (32) upper end can endwisely slip in the bottom cylindrical surface of upper valve body (37).Be provided with force application spring (38) in pressure-releasing chamber (36), its active force acts on guide's spool (32) by spring seat (39), and the other end of force application spring (38) joins by spring seat (61) and upper valve body (37).Adjusting screw (40) can be used to regulate the size of the active force of force application spring (38).Hyperbaric chamber (34) is made of following valve body (41) and guide's spool (32) lower end surface (42), and formerly guide valve core lower end surface (42) are provided with annular sealing surface (43), and it can form sealing with the seal element (44) that is arranged on down on the valve body (41).Be provided with balance spring (45) in hyperbaric chamber (34), its active force acts on guide's spool (32) by spring seat (46), and the other end of balance spring joins by spring seat (62) and following valve body (41).Adjusting screw (47) is used for the size of active force of adjustment spring (45).If make the rigidity of balance spring (45) equal the rigidity of force application spring (38), just can make that the size of rigidity of the axial displacement of guide's spool (32) and force application spring (38) is irrelevant.Put on the constant that the displacement of just becoming of spring force on guide's spool (32) and guide's spool (32) has nothing to do with withing joint efforts this moment, this can not only significantly reduce the Blowdown of a safety valve of pilot valve (33), thereby the Blowdown of a safety valve of reduction main valve, and can eliminate spring rate, thereby occasion very low applicable to pressure medium or that the medium temperature fluctuation is bigger to the safety valve Effect on Performance.The top of guide's spool (32) is provided with a cylinder, and this cylinder matches with the cylinder of the lower end of pilot valve upper valve body (37), and guide's spool (32) can be endwisely slipped in upper valve body (37).Formerly the bottom of guide valve core (32) is provided with a conical surface (51) (also can be other curved surfaces such as sphere).After pilot valve opened jumping, this conical surface can contact with the right angle (52) of upper valve body (37) lower end.Formerly the cylinder partial of guide valve core (32) is provided with the passage (50) that is communicated with pilot valve control chamber (35) and pressure-releasing chamber (36).
When main valve (64) when being in closed condition, pilot valve (33) also is in closed condition.That is the sealing surface (43) on guide's spool (32) forms sealing with seal element (44).The sealing force at this place is the net effort after force application spring (38) overcomes the active force of balance spring (45) and acts on pressure medium active force on the end face (42) of guide's spool (32).When being in close valve state, its hyperbaric chamber (34) is blocked with control chamber (35) at pilot valve (33), and control chamber (35) is communicated with by passage (50) with pressure-releasing chamber (36), thereby main valve pressure chamber (8) are communicated with atmosphere.Main valve clack (12) connects between its sealing surface (13) and seal element (16) and erects reliable sealing just under the pressure medium effect of main valve inlet side (20).Because the sealing at this place has the effect of pressure self-tightening, thereby more near the cracking pressure of safety valve, its sealing force is bigger, and sealing effect better.When the pressure of main valve inlet side (20) rises to the cracking pressure of safety valve, the pressure medium power on the lower end surface (42) of guide's spool (32) of acting on will overcome making a concerted effort of force application spring (38) and balance spring (45), make guide's spool (32) that axial displacement take place, the conical surface (51) of the right angle of upper valve body lower end (52) and guide's spool (32) forms line contact sealing as a result, has blocked being communicated with of control chamber (35) and pressure-releasing chamber (36).Simultaneously, because the sealing surface (43) of guide's spool (32) breaks away from seal element (44), hyperbaric chamber (34) is communicated with control chamber (35).The pressure medium of main valve inlet side (20) just enters in the main valve pressure chamber (8) by hyperbaric chamber (34), control chamber (35), because the effective compression area of main valve plug (1) in pressure chamber (8) is greater than its effective compression area at main valve inlet side (20), the difference of consequent pressure medium active force can overcome the active force of main spring (25), make main valve plug (1) be opened to the Lift of regulation rapidly, release.When the pressure of main valve inlet side (20) is reduced to the Reseating pressure of a safety valve of safety valve, the end face (42) of guide's spool (32) is gone up suffered pressure medium active force and is descended, so that this medium active force of making a concerted effort to overcome of the active force of force application spring (38) and balance spring (45), make guide's spool (32) return seat, and between sealing surface (43) and seal element (44), rebulid sealing, the control chamber (35) of pilot valve this moment (33) is blocked with hyperbaric chamber (34) and is connected with pressure-releasing chamber (36), thereby the pressure medium in main valve pressure chamber (8) is let out rapidly to atmosphere, main valve plug (1) has lost the medium active force that is produced by pressure chamber (8) like this, it is just under the effect of the active force of pressure medium active force on the flap (12) and main spring (25), return seat rapidly, and between sealing surface (12) and seal element (16), set up sealing, return to closed condition.
In case being communicated with main valve (64) stops up or can't open when reaching cracking pressure because of other faults make guide's spool (32) with the pipeline generation of pilot valve (33), then main valve pressure chamber (8) just can't pass through the action conducting of pilot valve with main valve inlet side (20), main valve plug (1) thereby lost opening force is released so that main valve can't be opened.In this case, the rupture disk (18) that is arranged on the main valve clack (12) just makes main valve inlet side (20) directly be communicated with main valve pressure chamber (8) in the following explosion of specified action pressure (being no more than the relieving pressure of safety valve), and main valve plug is just opened rapidly under the opening force effect and released.
Fig. 3 is the another kind of scheme of Fig. 2, it is characterized in that hyperbaric chamber (34) in pilot valve (33) is provided with magnet and replaces balance spring (45) among Fig. 2, a utmost point (53) of magnet is fixed on down on the valve body (41), and another utmost point is fixed on guide's spool (32).Its advantage is closing flexibly of pilot valve, and its Blowdown of a safety valve is reduced.The structure of other parts among Fig. 3 is identical with effect and Fig. 2.
Fig. 4 is the another kind of scheme of Fig. 2, it is characterized in that in the hyperbaric chamber (34) in Fig. 2 balance spring (45) not being set, and this can make the structure of pilot valve simplify greatly under the pressure medium condition with higher.Identical among the structure of other parts among Fig. 4 and effect and Fig. 2.
Fig. 5 is the another kind of scheme of Fig. 1, it is characterized in that not being provided with on main valve plug shown in Figure 1 (1) passage (21), by the discharge passage (55) that is arranged on the main valve clack (12) side of rupture disk directly is exposed to the main valve outlet side.At this moment, in case pilot valve is malfunctioning, main valve can't be opened under the cracking pressure of regulation, then rupture disk can be in specified action pressure (being no more than the relieving pressure of safety valve) explosion down, this moment, pressure medium will directly be released to main valve outlet side (60) via discharge passage (55) by main valve inlet side (20), and the superpressure medium is released away.Also be stuck and can not open even its advantage is a main valve, this safety valve can carry out overpressure relief being no more than equally under the relieving pressure of regulation, thereby reliability is higher.The structure of the remaining parts among Fig. 5 is identical with function and Fig. 1.
Maximum characteristics of the present utility model are, it is reliable to have kept existing pilot operated safety valve sealing, blowdown of a safety valve is little, the advantages such as action accurate and flexible, overcome the shortcoming of existing pilot operated safety valve poor reliability, in case pilot valve is malfunctioning, main valve still can be no more than the relieving pressure of regulation Under carry out overpressure relief, satisfy pressure vessel to the action request of safety valve, can be widely used in the fluid-pressure system of the industries such as chemical industry, petrochemical industry, chemistry, metallurgy.
Claims (9)
1. pressurized container Pilot operated safety valve, it is made up of main valve and pilot valve two-part, and main valve is provided with a pressure chamber; It is characterized in that main valve is provided with rupture disk, and a side of rupture disk is connected with the main valve pressure chamber.
2. pressurized container Pilot operated safety valve according to claim 1.The opposite side that it is characterized in that rupture disk is connected with the main valve inlet side.
3. pressurized container Pilot operated safety valve according to claim 1.The opposite side that it is characterized in that rupture disk is connected with the main valve outlet side.
4. pressurized container Pilot operated safety valve according to claim 2 is characterized in that valve core of main valve is provided with the passage that is communicated with main valve inlet side and main valve pressure chamber, is provided with rupture disk at this interchannel.
5. pressurized container Pilot operated safety valve according to claim 3 is characterized in that the flap of main valve is provided with rupture disk, and a side of rupture disk is communicated with opposite side and is communicated with the main valve outlet side with the main valve inlet side.
6. according to claim 1 or 2 or 3 described pressurized container Pilot operated safety valves, it is characterized in that the spool of pilot valve is divided into three chambeies with pilot valve body: hyperbaric chamber, control chamber and pressure-releasing chamber; Hyperbaric chamber is communicated with the main valve inlet side, and control chamber is communicated with the main valve pressure chamber, and pressure-releasing chamber is communicated with the main valve outlet side; Be provided with force application spring in the pressure-releasing chamber of pilot valve, an end of this spring joins by spring seat and guide's valve body, and the other end joins by spring seat and guide's spool.
7. pressurized container Pilot operated safety valve according to claim 6 is characterized in that being provided with balance spring in the pilot valve hyperbaric chamber, and an end of this spring joins by spring seat and guide's valve body, and the other end joins by spring seat and guide's spool.
8. pressurized container Pilot operated safety valve according to claim 6 is characterized in that the pilot valve hyperbaric chamber is provided with magnet, and a utmost point of magnet is fixed on guide's valve body, and another utmost point is fixed on guide's spool.
9. according to claim 6 or 7 or 8 described pressurized container Pilot operated safety valves, it is characterized in that the curved surface that the structure of guide's spool has cylinder and joins with this cylinder, this cylinder matches with cylinder on being arranged on guide's valve body, this curved surface contacts with guide's valve body after pilot valve opens jumping, and formerly the cylinder partial of guide valve core is provided with the passage that is communicated with pilot valve control chamber and pressure-releasing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90220716 CN2078836U (en) | 1990-09-15 | 1990-09-15 | Leading safety valve for pressure containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90220716 CN2078836U (en) | 1990-09-15 | 1990-09-15 | Leading safety valve for pressure containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2078836U true CN2078836U (en) | 1991-06-12 |
Family
ID=4899099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90220716 Withdrawn CN2078836U (en) | 1990-09-15 | 1990-09-15 | Leading safety valve for pressure containers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2078836U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534138A (en) * | 2014-11-24 | 2015-04-22 | 西南石油大学 | Ground constant-pressure throttling valve |
| CN108331948A (en) * | 2018-01-23 | 2018-07-27 | 中国长江电力股份有限公司 | Pilot-operated type booster shutoff valve and control method |
| CN109373027A (en) * | 2018-12-17 | 2019-02-22 | 金冬梅 | A kind of Spring-Loaded Pressure Relief Valve that spring service life is high |
-
1990
- 1990-09-15 CN CN 90220716 patent/CN2078836U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534138A (en) * | 2014-11-24 | 2015-04-22 | 西南石油大学 | Ground constant-pressure throttling valve |
| CN108331948A (en) * | 2018-01-23 | 2018-07-27 | 中国长江电力股份有限公司 | Pilot-operated type booster shutoff valve and control method |
| CN108331948B (en) * | 2018-01-23 | 2023-05-16 | 中国长江电力股份有限公司 | Pilot-operated type pipe explosion shutoff valve and control method |
| CN109373027A (en) * | 2018-12-17 | 2019-02-22 | 金冬梅 | A kind of Spring-Loaded Pressure Relief Valve that spring service life is high |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4485843A (en) | Variable pressure relief and control valve | |
| US3702141A (en) | Gas type safety valve | |
| US3602261A (en) | Stream turbine control valve structure | |
| CA1235042A (en) | Pressure-reducing apparatus | |
| US4240463A (en) | Safety valve actuator and pilot system | |
| CN201599463U (en) | Mini full lift safety valve | |
| CN101825191A (en) | Piston sealed safety valve | |
| US4482127A (en) | Valve structure | |
| CN112032377B (en) | Quick-response pilot operated safety valve and system overpressure quick protection method | |
| CN2078836U (en) | Leading safety valve for pressure containers | |
| WO2024032240A1 (en) | Double-safety intelligent safety valve | |
| US5163471A (en) | Low-pressure pilot valve | |
| GB2080495A (en) | Seal for a balanced relief valve | |
| CN2251655Y (en) | Diaphragm type shockproof leading low pressure safety valve | |
| CN1183346C (en) | Normal open guiding type safety valve combined with blasting sheet | |
| CN201810837U (en) | Piston sealing type safety valve | |
| CN2037419U (en) | Leader type safe vlave | |
| CN2309470Y (en) | Leading gas safety relief valve | |
| JPS60184907A (en) | Valve device | |
| KR102418912B1 (en) | Relief valve with popping function | |
| CN216447490U (en) | Pressure reducing valve comprising vacuum breaker | |
| CN210950074U (en) | Multi-working-condition safety valve | |
| CN216043913U (en) | Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof | |
| JPH01176870A (en) | Relief/stop complex valve | |
| US6047731A (en) | Pressure fitting, in particular a pressure relief and safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |