CN108691850B - Ultrahigh pressure relief system - Google Patents
Ultrahigh pressure relief system Download PDFInfo
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- CN108691850B CN108691850B CN201810718284.6A CN201810718284A CN108691850B CN 108691850 B CN108691850 B CN 108691850B CN 201810718284 A CN201810718284 A CN 201810718284A CN 108691850 B CN108691850 B CN 108691850B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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Abstract
The invention discloses an ultrahigh pressure relief system, which comprises a double-acting piston type pressure relief cylinder and a pressure relief pipeline, wherein the double-acting piston type pressure relief cylinder comprises a cylinder barrel and a piston, the cylinder barrel comprises a first pressure relief cavity, a second pressure relief cavity and a third pressure relief cavity, the second pressure relief cavity and the third pressure relief cavity are respectively arranged at the left side and the right side of the first pressure relief cavity and are communicated with the first pressure relief cavity, the diameter of the first pressure relief cavity is larger than that of the second pressure relief cavity and that of the third pressure relief cavity, the piston comprises a first piston arranged in the first pressure relief cavity and two second pistons respectively arranged in the second pressure relief cavity and the third pressure relief cavity, and the first piston and the second piston are integrally arranged; the pressure relief pipeline comprises an ultrahigh pressure pipeline and a high pressure pipeline. Compared with the prior art, the invention has the advantages of controllable pressure relief value, adjustable speed, realization of continuous pressure relief of the ultrahigh pressure device, simple and convenient operation and high repetitive control precision.
Description
Technical Field
The invention relates to the field of fluid transmission and pressure control, in particular to an ultrahigh pressure relief system.
Background
The ultrahigh pressure relief system is an important component of each large ultrahigh pressure test device, and has the function of relieving the pressure of the system at a certain rate according to the parameter index requirements of the system.
The ultrahigh pressure relief system and the ultrahigh pressure boosting system generally form a complete pressure control system. At present, more and more enterprises have strict parameter index requirements on the pressurization rate and the pressure relief rate of a pressure control system, namely the pressure relief rate is required to be the same as the pressurization rate, the numerical value is controllable, and the rate is adjustable, so that the pressure resistance condition of equipment under alternating stress is verified. The existing ultrahigh pressure relief system mostly adopts a pneumatic full-open pressure relief valve to relieve pressure, and the system pressure under the action of the mode can be reduced to normal pressure within a few seconds. The pressure relief rate is determined by the comprehensive factors of the total volume of the ultrahigh pressure system, the working pressure of the system, the effective drift diameter of a pressure relief pipeline and the like. Once the system is built, the pressure relief rate also solidifies and the pressure relief curve is almost a constant slope curve. The pressure relief rate is about 30MPa/S, which is far greater than the actual rate requirement of 10MPa/min, and the unloading pressure cannot be accurately controlled. In addition, a few pressure relief systems adopt a mode of manually controlling the opening degree of a pressure relief valve to relieve pressure. Namely, the opening degree of the pressure relief valve is manually adjusted: the pressure drop condition of the system is observed through naked eyes, and then the opening degree of the pressure relief valve is manually adjusted according to the drop rate, so that the aim of slowly dropping the system pressure is fulfilled. Although the pressure relief rate is relatively adjustable, the pressure relief value cannot be accurately controlled, and the repeatability of the pressure relief curve is extremely low. Obviously, the two pressure relief modes cannot meet the requirements of the system on controllable and adjustable pressure relief rate.
In view of the above, there is an urgent need to improve the existing ultra-high pressure relief system to have controllability and adjustability of the pressure relief rate and good repeatability.
Disclosure of Invention
The invention aims to solve the technical problems that the existing ultrahigh-pressure relief system has no controllability and adjustability for pressure relief and has poor repeatability.
In order to solve the above technical problem, the present invention adopts a technical solution of providing an ultrahigh pressure relief system, including:
the double-acting piston type pressure relief cylinder comprises a cylinder barrel and a piston, wherein the cylinder barrel comprises a first pressure relief cavity, a second pressure relief cavity and a third pressure relief cavity, the second pressure relief cavity and the third pressure relief cavity are respectively arranged on the left side and the right side of the first pressure relief cavity and are communicated with the first pressure relief cavity, the diameter of the first pressure relief cavity is larger than that of the second pressure relief cavity and that of the third pressure relief cavity, the piston comprises a first piston arranged in the first pressure relief cavity and two second pistons respectively arranged in the second pressure relief cavity and the third pressure relief cavity, and the first piston and the second piston are integrally arranged;
pressure release pipeline, including superhigh pressure pipeline and high-pressure line, superhigh pressure pipeline includes:
the first ultrahigh pressure pipeline is connected with the ultrahigh pressure container and the second pressure relief cavity and is provided with a first pneumatic control valve;
the second ultrahigh pressure pipeline is connected with the ultrahigh pressure container and the third pressure relief cavity and is provided with a second pneumatic control valve;
the third ultrahigh pressure pipeline is connected with the water tank and the second pressure relief cavity and is provided with a third air control valve;
the fourth ultrahigh pressure pipeline is connected with the water tank and the third pressure relief cavity and is provided with a fourth pneumatic control valve;
the high-pressure line includes:
one end of the first high-pressure pipeline is connected with a reversing valve, and the other end of the first high-pressure pipeline is connected with the first pressure relief cavity positioned at the left side part of the first piston;
the second high-pressure pipeline is connected with the reversing valve and the first pressure relief cavity positioned at the right part of the first piston;
one end of the third high-pressure pipeline is connected with the reversing valve, and the other end of the third high-pressure pipeline is connected with the water tank;
and the fourth high-pressure pipeline is connected with the water tank and the reversing valve.
In the above scheme, the reversing valve includes a first working position, a second working position and a third working position, the first working position interrupts the first, second, third and fourth high-pressure pipelines, the second working position enables the second high-pressure pipeline to be communicated with the third high-pressure pipeline, the first high-pressure pipeline is communicated with the fourth high-pressure pipeline, and the third working position enables the second high-pressure pipeline to be communicated with the fourth high-pressure pipeline, and the first high-pressure pipeline is communicated with the third high-pressure pipeline.
In the above scheme, the first and third ultrahigh pressure pipelines are connected to the second pressure relief cavity through a first pressure pipeline, the second and fourth ultrahigh pressure pipelines are connected to the third pressure relief cavity through a second pressure pipeline, the first pressure pipeline is provided with a left pressure transmitter, and the second pressure pipeline is provided with a right pressure transmitter.
In the above scheme, a pressure pump and a one-way valve are arranged on the third high-pressure pipeline.
In the above scheme, the third high-pressure pipeline is connected with a fifth high-pressure pipeline, the fifth high-pressure pipeline is communicated with the water tank, and the fifth high-pressure pipeline is provided with a pump outlet pressure transmitter and an overflow valve.
In the above scheme, the first and second ultrahigh pressure lines are respectively provided with a first check valve and a second check valve.
In the above scheme, the first and second ultrahigh pressure pipelines are connected to the ultrahigh pressure vessel through a fifth ultrahigh pressure pipeline, the fifth ultrahigh pressure pipeline is connected to a sixth ultrahigh pressure pipeline, and the sixth ultrahigh pressure pipeline is provided with a manual pressure relief valve.
In the above scheme, the first piston and the second piston are respectively provided with a first sealing ring and a second sealing ring.
In the scheme, the reversing valve is a three-position four-way electromagnetic reversing valve.
Compared with the prior art, the invention has the advantages of controllable pressure relief value, adjustable speed, capability of realizing continuous pressure relief of the system, simple and convenient operation and high repetitive control precision.
Drawings
FIG. 1 is a schematic diagram of an ultra-high pressure relief system according to the present invention;
FIG. 2 is a schematic diagram of a double-acting piston type pressure relief cylinder according to the present invention;
FIG. 3 is a schematic view of the invention in an initial state prior to pressure relief;
FIG. 4 is a schematic illustration of a single pressure relief of the present invention;
fig. 5 is a schematic diagram of the secondary pressure relief of the present invention.
Detailed Description
The invention provides an ultrahigh pressure relief system aiming at the problems that the pressure relief system for relieving the pressure of an ultrahigh pressure device in the prior art has no controllability and adjustability and is poor in repeatability. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 5, the invention provides an ultrahigh pressure relief system, which comprises a double-acting piston type pressure relief cylinder 10 and a pressure relief pipeline, wherein a high-pressure medium in an ultrahigh pressure device can be discharged through the pressure relief pipeline by the left and right movement of a piston 12 in the double-acting piston type pressure relief cylinder 10.
The double-acting piston type pressure relief cylinder 10 comprises a cylinder barrel 11 and a piston 12, wherein the cylinder barrel 11 comprises a first pressure relief cavity 111, and a second pressure relief cavity 112 and a third pressure relief cavity 113 which are respectively arranged at the left side and the right side of the first pressure relief cavity 111, the first pressure relief cavity 111 is communicated with the second pressure relief cavity 112 and the third pressure relief cavity 113, and the diameter of the first pressure relief cavity 111 is larger than that of the second pressure relief cavity 112 and the third pressure relief cavity 113.
The piston 12 includes a first piston 121 disposed in the first pressure relief chamber 111 and two second pistons 122 disposed in the second pressure relief chamber 112 and the third pressure relief chamber 113, respectively, and the first piston 121 is disposed integrally with the second pistons 122, that is, the first piston 121 and the second pistons 122 move in synchronization. The first piston 121 and the second piston 122 are provided with a first seal 1211 and a second seal 1221, respectively. Preferably, the first seal ring 1211 and the second seal ring 1221 are provided in plurality.
The pressure relief pipeline comprises an ultrahigh pressure pipeline and a high pressure pipeline which are used for relieving the pressure of the ultrahigh pressure device. Wherein, super high pressure pipeline includes: the first ultrahigh pressure pipeline 21 is connected with the ultrahigh pressure container 40 and the second pressure relief cavity 112, and the first ultrahigh pressure pipeline 21 is provided with a first pneumatic control valve 211; a second ultrahigh pressure pipeline 22 connecting the ultrahigh pressure vessel 40 and the third pressure relief chamber 113, the second ultrahigh pressure pipeline 22 being provided with a second pneumatic control valve 221; a third ultrahigh pressure pipeline 23 connecting the water tank 50 and the second pressure relief chamber 112, the third ultrahigh pressure pipeline 23 being provided with a third pneumatic control valve 231; the fourth ultrahigh pressure pipeline 24 is connected with the water tank 40 and the third pressure relief chamber 113, and a fourth pneumatic control valve 241 is arranged on the fourth ultrahigh pressure pipeline 24.
The first ultrahigh pressure line 21 and the second ultrahigh pressure line 22 are provided with a first check valve 212 and a second check valve 222, respectively. First superhigh pressure pipeline 21, third superhigh pressure pipeline 23 communicate through first pressure pipeline and second pressure chamber 112, and second superhigh pressure pipeline 22, fourth superhigh pressure pipeline 24 communicate through second pressure pipeline and third pressure chamber 113, are equipped with left pressure transmitter 25 and right pressure transmitter 26 on first pressure pipeline and the second pressure pipeline respectively for show the pressure of two sides of double-acting piston pressure relief jar 10. The first ultrahigh pressure pipeline 21 and the second ultrahigh pressure pipeline 22 are connected with the ultrahigh pressure vessel 40 through a fifth ultrahigh pressure pipeline 27, the fifth ultrahigh pressure pipeline 27 is connected with a sixth ultrahigh pressure pipeline 28, and the sixth ultrahigh pressure pipeline 28 is provided with a manual pressure release valve 29.
The high-pressure line includes: a first high pressure line 31 connecting the direction switching valve 60 and the first pressure relief chamber 111 at the left side portion of the first piston 121; a second high pressure line 32 connecting the direction switching valve 60 and the first pressure relief chamber 111 at the right side portion of the first piston 121; a third high-pressure line 33 connecting the change valve 60 and the tank 50; a fourth high pressure line 34 connects the diverter valve 60 to the tank 50.
The third high-pressure line 33 is provided with a pressurizing pump 35 and a check valve 36. The third high-pressure pipeline 33 is connected with a fifth high-pressure pipeline 37, the fifth high-pressure pipeline 37 is communicated with a water tank 50, and a pump outlet pressure transmitter 38 and an overflow valve 39 are arranged on the fifth high-pressure pipeline 37.
The reversing valve 60 is a three-position four-way electromagnetic reversing valve and comprises a first working position, a second working position and a third working position, wherein the first working position blocks the first high-pressure pipeline 31, the second high-pressure pipeline 32, the third high-pressure pipeline 33 and the four high-pressure pipelines 34; the second working position communicates the second high-pressure line 32 with the third high-pressure line 33, and communicates the first high-pressure line 31 with the fourth high-pressure line 34; the third operating position communicates the second high-pressure line 32 with the fourth high-pressure line 34 and the first high-pressure line 31 with the third high-pressure line 33.
The working principle of the ultrahigh pressure relief system provided by the invention is as follows:
one side of the first piston 121 is pressurized in the first pressure relief chamber 111 by the pressurizing pump 35 and the selector valve 60, and the second pressure relief chamber 112 or the third pressure relief chamber 113 is pressurized by the first pneumatic valve 211 and the second pneumatic valve 221, so that the piston 12 is moved leftward and rightward, and the high-pressure medium is discharged to the tank 50 through the third ultrahigh-pressure line 23 or the fourth ultrahigh-pressure line 24, thereby relieving pressure.
Wherein, the pressures of the pressurizing pump 35 to the left and right sides of the first piston 121 are respectively P2And P3The vertical pressure receiving areas of the left and right sides of the first piston 121 are S2And S3The pressures of the external ultrahigh pressure device to the second pressure relief cavity 112 and the third pressure relief cavity 113 are respectively P1And P4The vertical pressure-receiving areas of the two second pistons 122 respectively located in the second and third pressure-releasing chambers 112 and 113 are respectively S1And S4. The invention discloses a pressure relief device for an ultrahigh pressure device, which comprises the following steps:
s1, calculating the needed outlet pressure P of the booster pumpPump and method of operating the same；
PPump and method of operating the same＝P1×S1/S3
S2, preparation before pressure relief: before the system acts, the double-acting piston type pressure relief cylinder 10 is positioned at the middle position; the diverter valve 60 is in the first operating position; the first pneumatic control valve 211 and the second pneumatic control valve 221 are in an open state; the third pneumatic valve 231 and the fourth pneumatic valve 241 are in a closed state;
the pressure value at the outlet of the pressure pump 35 is PPump and method of operating the same. At this time, two ends of the double-acting piston type pressure relief cylinder 10 are connected with the ultrahigh pressure device, namely, the pressure values displayed by the left pressure transmitter 25 and the right pressure transmitter 26 are the pressure of the ultrahigh pressure device connected with the invention;
s2, closing the second pneumatic control valve 221 and opening the fourth pneumatic control valve 241;
the 60-position change of the reversing valve is changed to a second working position, at the moment, the pressure displayed by the right pressure transmitter 26 is 0, the pressure displayed by the left pressure transmitter 25 is the pressure of the ultrahigh pressure device, and at the moment, the stress conditions at the two ends of the double-acting piston type pressure relief cylinder 10 are as follows:
the force on the left side of the piston 12 is:F1＝P1×S1；
the right side of the piston 12 is stressed as follows: f2＝P3×S3；
At this time, if F1＝F2(ii) a Balancing the system;
reducing the pressure P3The thrust force to the right of the piston 12 by the ultrahigh-pressure device is made larger than the thrust force to the left of the piston 12 by the outlet pressure of the booster pump 30, even if F2<F1；
At this time, the piston 12 moves rightward, so that the high-pressure medium in the third pressure relief cavity 113 and the second pressure pipeline is discharged to the water tank 50 through the fourth ultrahigh-pressure pipeline 24 under the action of the double-acting piston type pressure relief cylinder 10; at the same time, the medium pressure in the ultrahigh-pressure vessel 40 decreases as the volume increases.
The pressure relief rate of the invention depends on the moving speed of the piston 12, under the action of the outlet pressure of the booster pump 35, the piston 12 is not impacted excessively in the pressure relief process, and the pressure relief is stable;
when the left and right sides of the piston 12 are stressed equally, once pressure relief is completed;
when the left side of the piston 12 is stressed to be equal to the right side, the piston 12 moves rightwards to the limit position, and at the moment, secondary pressure relief can be carried out.
S3, closing the fourth pneumatic control valve 241, opening the second pneumatic control valve 221, closing the first pneumatic control valve 211, and opening the third pneumatic control valve 231; changing the 60-position of the reversing valve to the first working position;
at this time, the pressure displayed by the left pressure transmitter 25 is 0, and the pressure displayed by the right pressure transmitter 26 is the pressure of the super high pressure device;
the change valve 60 is changed to the third working position, and at this time, the stress conditions at the two ends of the double-acting piston type pressure relief cylinder 10 are as follows:
the force on the left side of the piston 12 is: f3＝P2×S2；
The right side of the piston 12 is stressed as follows: f4＝P4×S4；
At this time, the leftward thrust of the ultrahigh-pressure device on the piston 12 is greater than that of the pressurizing pump 30The rightward thrust of the outlet pressure on the piston 12, i.e. F3<F4；
At this time, the piston 12 moves leftward, so that the high-pressure medium in the second pressure relief chamber 112 and the original first pressure line is discharged to the tank 50 through the third ultrahigh-pressure line 23 by the double-acting piston type pressure relief cylinder 10, and the medium pressure in the ultrahigh-pressure vessel 40 decreases due to the increase in volume.
Thus, secondary pressure relief is completed. When the force on the left side of the piston 12 is equal to the force on the right side, the piston 12 moves to the left to the extreme position, and at the moment, once more pressure relief can be performed.
S4, according to the first and second pressure relief circulation, the thrust generated by the ultra-high pressure device to the piston 12 is equal to the thrust generated by the outlet pressure of the pressure pump 15 to the piston 12, at this time, the pressure P of the ultra-high pressure device to the pressure piston 121Or P4Is the unloading pressure;
and S5, changing the position of the reversing valve 60 into the first working position, and self-locking the system.
In the primary and secondary pressure relief processes, when the piston 12 moves to the left or right to the limit position, the first piston 121 presses the cylinder 11 to offset the pressure of the external ultrahigh pressure device.
By once adjusting PPump and method of operating the sameTo P2Or P3Realizing repeated continuous pressure relief, and in addition, in the process of continuous pressure relief, P can be adjustedPump and method of operating the sameThe size of the control system is controlled flexibly.
The invention has the beneficial effects that:
(1) the pressure relief value is controllable: the final load relief pressure of the system is accurately controlled by accurately controlling the outlet pressure of the pressure pump;
(2) the pressure release rate is adjustable: the moving speed of the piston rod is adjusted by controlling the thrust difference generated by the outlet pressure of the pressure pump and the pressure of the ultrahigh pressure system on the two sides of the piston rod, so that the pressure relief rate of the system is adjusted, and the system has better stability and controllability;
(3) the system has high repetition precision: under the same technical parameter state, the pressure relief curve of the system can relieve pressure according to the set speed, and the repetition precision is high.
In practical application, when the pressure relief rate of the system is too fast, the outlet pressure of the booster pump 30 is appropriately increased, the thrust difference generated by the system pressure and the pressure of the booster pump 30 on the piston 12 is reduced, and the purpose of reducing the pressure relief rate is achieved by reducing the moving speed of the piston 12. When the system pressure is close to the unloading pressure, the outlet pressure of the pressurizing pump 30 is adjusted to a set value, and it is ensured that the system pressure is the unloading pressure when the two ends of the piston 12 are balanced. In addition, in emergency, the manual pressure relief valve 29 is manually opened, so that the system can be quickly unloaded to normal pressure, and safety guarantee is provided for the system.
A specific set of examples is given below:
the capacity of the ultrahigh pressure device is 200L, the working pressure is 250MPa, the pressure increasing rate is 10MPa/min, the pressure relief value is 50MPa, the required pressure relief rate is 10MPa/min, the corresponding drift diameter of the ultrahigh pressure pipe is 3.2mm, and the load relief capacity of the system is 18.8L. The diameters of the second and third pressure relief chambers 112 and 113 of the cylinder 11 were 80mm, the diameter of the first pressure relief chamber 111 was 240mm, the stroke of the piston 12 was 300m, and the single-stroke relief volume was 1.5L. The outlet pressure of the pressure pump 35 was 6.25 MPa.
The third pneumatic control valve 23 and the fourth pneumatic control valve 24 are adjusted to enable the circulation path of the ultrahigh pressure pipeline to be 0.36mm, the piston 12 circularly moves left and right due to the pressure difference between the two sides, and the pressure relief rate of the system is about 10 MPa/min. After the piston is operated for about 13 times, the thrust forces on the two sides of the piston 12 of the double-acting piston type pressure relief cylinder 10 are equal, and the piston 12 is static. At the moment, about 18.8L of pressure medium is discharged from the ultrahigh pressure system through the double-acting piston type pressure relief cylinder 10, the pressure of the system is reduced to 50MPa, and pressure relief is completed.
Compared with the prior art, the invention has the advantages of controllable pressure relief value, adjustable speed, capability of realizing continuous pressure relief of the system, simple and convenient operation and high repetitive control precision.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (9)
1. An ultra-high pressure relief system, comprising:
the double-acting piston type pressure relief cylinder comprises a cylinder barrel and a piston, wherein the cylinder barrel comprises a first pressure relief cavity, a second pressure relief cavity and a third pressure relief cavity, the second pressure relief cavity and the third pressure relief cavity are respectively arranged on the left side and the right side of the first pressure relief cavity and are communicated with the first pressure relief cavity, the diameter of the first pressure relief cavity is larger than that of the second pressure relief cavity and that of the third pressure relief cavity, the piston comprises a first piston arranged in the first pressure relief cavity and two second pistons respectively arranged in the second pressure relief cavity and the third pressure relief cavity, and the first piston and the second piston are integrally arranged;
pressure release pipeline, including superhigh pressure pipeline and high-pressure line, superhigh pressure pipeline includes:
the first ultrahigh pressure pipeline is connected with the ultrahigh pressure container and the second pressure relief cavity and is provided with a first pneumatic control valve;
the second ultrahigh pressure pipeline is connected with the ultrahigh pressure container and the third pressure relief cavity and is provided with a second pneumatic control valve;
the third ultrahigh pressure pipeline is connected with the water tank and the second pressure relief cavity and is provided with a third air control valve;
the fourth ultrahigh pressure pipeline is connected with the water tank and the third pressure relief cavity and is provided with a fourth pneumatic control valve;
the high-pressure line includes:
one end of the first high-pressure pipeline is connected with a reversing valve, and the other end of the first high-pressure pipeline is connected with the first pressure relief cavity positioned at the left side part of the first piston;
the second high-pressure pipeline is connected with the reversing valve and the first pressure relief cavity positioned at the right part of the first piston;
one end of the third high-pressure pipeline is connected with the reversing valve, and the other end of the third high-pressure pipeline is connected with the water tank;
and the fourth high-pressure pipeline is connected with the water tank and the reversing valve.
2. The system according to claim 1, wherein said directional control valve comprises a first, a second and a third operating position, said first operating position interrupts said first, second, third and fourth high pressure lines, said second operating position communicates said second high pressure line with said third high pressure line and said first high pressure line with said fourth high pressure line, said third operating position communicates said second high pressure line with said fourth high pressure line and said first high pressure line with said third high pressure line.
3. The system according to claim 1, wherein said first and third ultra-high pressure lines are connected to said second pressure relief chamber via a first pressure line, said second and fourth ultra-high pressure lines are connected to said third pressure relief chamber via a second pressure line, said first pressure line is provided with a left pressure transmitter, and said second pressure line is provided with a right pressure transmitter.
4. The system according to claim 1, wherein a booster pump and a check valve are provided on the third high pressure line.
5. The ultrahigh-pressure relief system according to claim 1, wherein a fifth high-pressure pipeline is connected to the third high-pressure pipeline, the fifth high-pressure pipeline is communicated with the water tank, and a pump outlet pressure transmitter and an overflow valve are arranged on the fifth high-pressure pipeline.
6. The system according to claim 1, wherein said first and second ultra high pressure lines are provided with a first check valve and a second check valve, respectively.
7. The system according to claim 1, wherein the first and second ultrahigh pressure pipelines are connected to the ultrahigh pressure vessel through a fifth ultrahigh pressure pipeline, the fifth ultrahigh pressure pipeline is connected to a sixth ultrahigh pressure pipeline, and the sixth ultrahigh pressure pipeline is provided with a manual pressure relief valve.
8. The system according to claim 1, wherein said first piston and said second piston are provided with a first sealing ring and a second sealing ring, respectively.
9. The system according to claim 1, wherein said directional control valve is a three-position four-way solenoid directional control valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718284.6A CN108691850B (en) | 2018-07-03 | 2018-07-03 | Ultrahigh pressure relief system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810718284.6A CN108691850B (en) | 2018-07-03 | 2018-07-03 | Ultrahigh pressure relief system |
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| CN108691850A CN108691850A (en) | 2018-10-23 |
| CN108691850B true CN108691850B (en) | 2019-12-24 |
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| CN201810718284.6A Active CN108691850B (en) | 2018-07-03 | 2018-07-03 | Ultrahigh pressure relief system |
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| CN113295538B (en) * | 2021-05-31 | 2024-04-02 | 山西互昇科技有限公司 | Pressure regulating method of hydrostatic testing machine |
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| EP0959217A2 (en) * | 1998-05-22 | 1999-11-24 | Hoerbiger Hydraulik GmbH | Assembly for hydraulically operating a tailgate |
| JP2000097203A (en) * | 1998-09-22 | 2000-04-04 | Sugiyasu Kogyo Kk | Hydraulic synchronizing device and hydraulic lift |
| CN101235838A (en) * | 2008-02-25 | 2008-08-06 | 西南石油大学 | Blowout preventer manual hydraulic control locking apparatus |
| CN201621464U (en) * | 2010-04-13 | 2010-11-03 | 中国农业大学 | Rapid decompression system for ultrahigh pressure container |
| CN106150530A (en) * | 2016-06-30 | 2016-11-23 | 兖州煤业股份有限公司 | Hydraulic prop prop raising tool |
| CN107476915A (en) * | 2017-08-22 | 2017-12-15 | 哈尔滨工程大学 | A kind of double-acting type high pressure fuel feedway with buffer unit |
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2018
- 2018-07-03 CN CN201810718284.6A patent/CN108691850B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0959217A2 (en) * | 1998-05-22 | 1999-11-24 | Hoerbiger Hydraulik GmbH | Assembly for hydraulically operating a tailgate |
| JP2000097203A (en) * | 1998-09-22 | 2000-04-04 | Sugiyasu Kogyo Kk | Hydraulic synchronizing device and hydraulic lift |
| CN101235838A (en) * | 2008-02-25 | 2008-08-06 | 西南石油大学 | Blowout preventer manual hydraulic control locking apparatus |
| CN201621464U (en) * | 2010-04-13 | 2010-11-03 | 中国农业大学 | Rapid decompression system for ultrahigh pressure container |
| CN106150530A (en) * | 2016-06-30 | 2016-11-23 | 兖州煤业股份有限公司 | Hydraulic prop prop raising tool |
| CN107476915A (en) * | 2017-08-22 | 2017-12-15 | 哈尔滨工程大学 | A kind of double-acting type high pressure fuel feedway with buffer unit |
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| CN108691850A (en) | 2018-10-23 |
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