CN217003164U - Electric hydrostatic high-pressure valve - Google Patents
Electric hydrostatic high-pressure valve Download PDFInfo
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- CN217003164U CN217003164U CN202121487400.1U CN202121487400U CN217003164U CN 217003164 U CN217003164 U CN 217003164U CN 202121487400 U CN202121487400 U CN 202121487400U CN 217003164 U CN217003164 U CN 217003164U
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- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
A kind of electronic hydrostatic high-pressure valve, is fixed with the fluid cylinder on the top cap of its valve block, the hydraulic stem of the fluid cylinder stretches into the valve block cavity downward, the inferior part of the hydraulic stem is inlaid with the valve core; a return spring is sleeved outside the hydraulic rod between the piston and the cylinder bottom; the top cover of the valve body extends out to one side to form a pump seat; an oil way control box and an oil tank are arranged on the pump base; the oil circuit control box is provided with an electric hydraulic pump; the electric hydraulic pump sucks oil from the oil tank through the first oil pipe, and high-pressure oil boosted by the electric hydraulic pump flows into the top of the inner cavity of the hydraulic cylinder through the second oil pipe, the first piezoelectric type high-speed switch valve, the third oil pipe and the first oil way to realize opening of the valve; the high-pressure oil boosted by the electric hydraulic pump flows into the bottom of the inner cavity of the hydraulic cylinder through the oil pipe II, the oil pipe six, the oil inlet and the oil outlet of the reversing valve, the oil pipe seven and the oil way II, so that the valve is closed. The valve is reliable and stable in control and high in response speed, and can be quickly closed, so that safety accidents are effectively avoided and reduced.
Description
Technical Field
The utility model relates to a high-pressure oil liquid conveying pipeline valve.
Background
The valve is used as widely used partition equipment, and the main purpose of the valve is to control and regulate the flow of liquid in a pipeline by controlling the closing of the valve. In a traditional valve, a hand wheel is rotated to control a valve rod, so that a valve core is driven to move in a valve cavity, and the valve is opened and closed. Along with the improvement of industry, civilian pipeline pressure grade, current valve is difficult to satisfy the requirement that high-pressure fluid reliably carried: 1. the gas-liquid pressure in the pipeline is big, and the corresponding very big packing force that produces the valve rod can lead to the valve rod to scurry outward, and the valve can not reliably be closed, can cause the incident when serious. 2. When high-pressure oil is conveyed through a pipeline, the pipeline and the valve vibrate, so that the connection between the valve rod and the valve core is possibly loosened, the reliability of the valve is reduced, and the service life of the valve is prolonged; when the vibration is serious, the valve can be cracked to form leakage, which causes pollution to the surrounding environment and accidents, and seriously harms the life and property safety of people. 3. When emergency such as pipeline leakage or pipe explosion occurs, the hand wheel is rotated manually, the valve cannot be closed quickly in a short time, and serious life and property loss can be caused.
In recent years, valves of all-electric actuators (see shorn "design research on valves and actuators for all-electric subsea production trees", volume 46, 5 th in 2018, petroleum machinery) are widely applied to high-pressure oil conveying pipelines, and reliability and safety of high-pressure oil conveying are effectively improved. The structure and the principle are that a screw rod of a planetary roller screw nut mechanism is connected with a driving motor, and a nut is connected with a valve rod through a connecting structure; the rotary motion of the driving motor is converted into the linear motion of the nut through the planetary roller screw nut mechanism, and then the valve rod drives the flashboard (valve core) to reciprocate. When the valve is opened, the driving motor drives the flashboard to move (simultaneously compresses a compression spring), and when a position sensor on the flashboard feeds back a flashboard through hole to coincide with an inner hole of an oil pipeline, the valve completes opening action; the driving motor with self-locking function is self-locked, the valve is always opened, and the pipeline is in a normal oil transportation state. When the power supply or the communication system has faults and other emergency conditions, the self-locking function of the driving motor disappears; meanwhile, the sliding friction force between the planetary roller screw and the nut is small, so that the screw rod and nut mechanism cannot be self-locked; the restoring force stored by the spring is greater than the sliding friction force between the screw rod and the nut; the valve rebounds rapidly under the action of the spring restoring force, so that the through hole in the flashboard is staggered with the inner hole of the oil pipeline, failure emergency closing is realized, and oil leakage and oil spraying are prevented. The valve is automatically controlled by the self-locking driving motor and the sensor, so that the opening and closing time of the valve is shortened, the reliability of the valve is improved, and the service life of the valve is prolonged. But when the sliding block is closed, the restoring force of a spring is required to overcome the friction force of a screw rod nut, the long-distance spiral motion is converted into the linear motion of the sliding block, and the closing time is 15 to 20 seconds. If an emergency accident occurs, the closing time of the valve is still long, and a production accident can still happen, so that the life and property safety of people is harmed. In addition, the device is designed electrically, so that the device has extremely high requirements on the internal environment, dust and water cannot enter the device, or faults such as electric leakage or short circuit can occur, and the reliability of the device needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an electric hydrostatic high-pressure valve which is reliable and stable in control, long in service life, suitable for controlling a high-pressure oil pipeline, capable of effectively reducing oil transportation leakage and reducing pollution to the environment; and the response speed is high, the closing action of the valve can be completed quickly and reliably under the emergency condition, the occurrence of safety accidents is effectively avoided and reduced, and property and life loss is greatly reduced.
The utility model realizes the technical scheme that the utility model adopts, an electric hydrostatic high-pressure valve comprises a valve body, an oil inlet of the valve body is connected with an oil inlet pipeline, an oil outlet of the valve body is connected with an oil outlet pipeline, and the electric hydrostatic high-pressure valve is characterized in that:
a hydraulic cylinder is fixed on the upper part of the top cover of the valve body, a hydraulic rod of the hydraulic cylinder downwards penetrates through the bottom of the hydraulic cylinder and the top cover of the valve body and extends into the inner cavity of the valve body, and a valve core matched with the inner cavity of the valve body is embedded outside the lower part of the hydraulic rod;
the hydraulic rod is positioned at the upper part in the hydraulic cylinder and is provided with a piston matched with the hydraulic cylinder, a return spring is sleeved outside the hydraulic rod between the bottom of the piston and the cylinder bottom, and the lower end of the return spring is fixed on the cylinder bottom; when the return spring is completely compressed, the valve core is positioned below the oil conveying oil inlet and the oil conveying oil outlet; when the return spring is in a release state of 2/3 or above, the valve core completely blocks the oil inlet of the oil transportation;
the top cover of the valve body extends out to one side to form a pump seat; the upper part of the pump seat is provided with an oil way control box and an oil tank; the oil circuit control box is provided with an electric hydraulic pump; the oil tank is communicated with an oil inlet of the electric hydraulic pump through an oil pipe I in the oil way control box;
the oil outlet of the electric hydraulic pump is connected with the oil inlet of the first piezoelectric high-speed switch valve through an oil pipe II in the oil way control box, and the oil outlet of the first piezoelectric high-speed switch valve is communicated with the top of the inner cavity of the hydraulic cylinder through an oil pipe III and an oil way I in the wall of the hydraulic cylinder;
an oil pipe II in the oil way control box is connected with an oil pipe IV in parallel, the other end of the oil pipe IV is connected with an oil inlet of a piezoelectric high-speed switch valve II, and an oil outlet of the piezoelectric high-speed switch valve II is connected with a hydraulic control oil port of the hydraulic control one-way valve through an oil pipe nine; an oil outlet of the hydraulic control one-way valve is connected to the third oil pipe in parallel through an oil pipe ten, an oil inlet of the hydraulic control one-way valve is communicated with one end of an oil pipe five in the oil way control box, and the other end of the oil pipe five is communicated with the oil tank;
the oil outlet of the electric hydraulic pump is also connected with the oil inlet of the reversing valve sequentially through an oil pipe II and an oil pipe VI connected to the oil pipe II in parallel; an oil outlet of the reversing valve is communicated with the bottom of the inner cavity of the hydraulic cylinder sequentially through an oil pipe seven and an oil way II in the wall of the hydraulic cylinder; and an oil return port of the reversing valve is communicated with an oil tank through an oil pipe eight in the oil way control box.
The working process and principle of the utility model are as follows:
firstly, opening and maintaining a valve:
opening a valve: starting a first piezoelectric type high-speed switch valve, closing a second piezoelectric type high-speed switch valve (the hydraulic control one-way valve is in a closed state), and reversing the reversing valve to an oil return port to be communicated with the oil outlet; the electric hydraulic pump is started. The electric hydraulic pump sucks oil from the oil tank through the first oil pipe, and high-pressure oil boosted by the electric hydraulic pump flows into the top of the inner cavity of the hydraulic cylinder through the second oil pipe, the first piezoelectric type high-speed switch valve, the third oil pipe and the first oil way; the high-pressure oil flowing into the top of the inner cavity of the hydraulic cylinder pushes the piston downwards, the piston compresses the return spring and pushes the hydraulic rod and the valve core at the lower part of the hydraulic rod to move towards the bottom of the valve body; meanwhile, oil at the bottom of the inner cavity of the hydraulic cylinder passes through an oil way II, an oil pipe seventh, an oil outlet and an oil return port of the reversing valve and an oil pipe eighth pressure oil return tank. When the valve core moves downwards to the position below the oil conveying oil inlet and the oil conveying oil outlet, the oil conveying oil inlet and the oil conveying oil outlet in the valve body are communicated, and the valve is opened.
Valve open state maintenance: closing the reversing valve, the first piezoelectric high-speed switch valve and the electric hydraulic pump (the second piezoelectric high-speed switch valve and the hydraulic control one-way valve are also in a closed state); the oil in the upper cavity (top) above the piston of the hydraulic cylinder and the oil in the lower cavity (bottom) below the piston are respectively in a closed and static space, the hydraulic rod and the valve core are always kept at the same static position, and the valve is always kept in a stable opening state.
Secondly, closing the valve:
and closing the first piezoelectric high-speed switch valve, opening the second piezoelectric high-speed switch valve, reversing the reversing valve to communicate the oil inlet with the oil outlet, and starting the electric hydraulic pump. The electric hydraulic pump sucks oil from the oil tank through the first oil pipe, and high-pressure oil boosted by the electric hydraulic pump enters the hydraulic control oil port of the hydraulic control one-way valve through the second oil pipe, the fourth oil pipe, the second piezoelectric high-speed switch valve and the ninth oil pipe to enable the hydraulic control one-way valve to be opened.
The high-pressure oil boosted by the electric hydraulic pump flows into the bottom of the inner cavity of the hydraulic cylinder through an oil pipe II, an oil pipe VI, an oil inlet and an oil outlet of the reversing valve, an oil pipe VII and an oil way II; high-pressure oil flowing into the bottom of the inner cavity of the hydraulic cylinder pushes the piston upwards, and simultaneously, the return spring is released to jointly push the hydraulic rod and the valve core at the lower part of the hydraulic rod to move towards the top of the valve body; oil at the top of the inner cavity of the hydraulic cylinder simultaneously passes through an oil way I, an oil pipe ten, an oil inlet and an oil outlet of a hydraulic control one-way valve and an oil pipe five-pressure oil return tank; the valve core moves upwards until the return spring is in a release state of 2/3 or above, and the valve core completely blocks the oil inlet of the oil transportation; and an oil conveying oil inlet and an oil conveying oil outlet in the valve body are disconnected, so that the valve is closed.
Compared with the prior art, the utility model has the beneficial effects that:
the electric hydrostatic valve disclosed by the utility model realizes the opening of the valve by driving the valve core in the valve body to move by high-pressure oil through the matching action of the electric hydraulic pump, the high-flow piezoelectric high-speed switch valve, the hydraulic control one-way valve and the return spring. After the hydraulic cylinder is opened, all reversing valves, switch valves and the electric hydraulic pump are closed, oil in an upper cavity and an lower cavity of the hydraulic cylinder are respectively in a closed and static space, the hydraulic rod and the valve core are always kept at the same static position, and the valves are always kept in a stable opening state. The valve of the utility model has stable and reliable working state; the problems of valve rod outward channeling, unstable valve state and unreliable work caused by stress of conveying high-pressure oil of a common mechanical valve are solved, and the problems of valve failure and unreliable work caused by the faults of electric leakage, short circuit and the like caused by the fact that the valve of the full electric actuating mechanism is immersed by dust and water are also solved.
Secondly, the static oil in the upper cavity and the lower cavity of the hydraulic cylinder in the stable opening state is in a mutually closed state; the vibration generated by high-pressure oil liquid in conveying can be well absorbed; in addition, the return spring also has the function of vibration reduction; the valve has excellent vibration reduction and shock resistance, and accidents caused by leakage due to looseness of valve parts and cracking of the valve are effectively avoided and reduced; the reliability and the service life of the valve are greatly improved, and the life and property safety of people is guaranteed.
Thirdly, comparing with a full electric actuator valve which needs to be electrified and can be self-locked by a driving motor and can be in a stable opening state; when the electric hydraulic pump is in a stable opening state, all the reversing valves, the switch valves and the electric hydraulic pump are in a closing and power-off state, and electric energy is not consumed. The valve is in a stable opening state most of the time, so the electric hydrostatic valve has low energy consumption, reduces the conveying cost of high-pressure oil and prolongs the service life of the valve.
The electric hydrostatic valve realizes linear driving of the valve core in the valve body by high-pressure oil through the matching of the electric hydraulic pump, the large-flow piezoelectric high-speed switch valve, the hydraulic control one-way valve and the return spring, and converts spiral driving into linear motion of the valve core compared with the conventional screw rod nut mechanism; the driving path of the utility model is greatly shortened, and the opening and closing speed of the valve is effectively improved. Especially when closing, its driving force existing the hydraulic pressure of electronic hydraulic pump, and the resilience force of reset spring, two power superposes, makes case withdrawal speed reach 2m/s, and the closing speed of this application valve reaches 2m/s promptly, and response speed is very fast. Under emergency such as pipe explosion, can close the valve rapidly, avoid with the emergence that reduces the accident, better guarantee people's life and property safety.
Furthermore, a filter is connected to the first oil pipe in series; the oil pipe II is also connected with one end of a bypass oil pipe in parallel, the other end of the bypass oil pipe is communicated with the oil tank, and the bypass oil pipe is connected with an overflow valve in series.
Therefore, the filter filters impurities in the oil tank, and ensures that each switch valve and each hydraulic cylinder are not blocked by the impurities in the oil, thereby ensuring the reliable work of the valve. An overflow valve is arranged on a bypass oil pipe connected with the oil pipe II in parallel to serve as a safety valve, damage to the oil pipe after pressure rise and devices on the oil pipe due to overhigh oil pressure is avoided, and reliability and safety of the valve are further guaranteed.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of an oil path structure according to an embodiment of the present invention.
Detailed Description
Examples
Fig. 1-2 show that, in a specific embodiment of the present invention, an electro-hydrostatic high pressure valve includes a valve body 1, an oil inlet 1a of the valve body 1 is connected to an oil inlet pipe 2a, and an oil outlet 1b of the valve body 1 is connected to an oil outlet pipe 2b, and the electro-hydrostatic high pressure valve is characterized in that:
fig. 1 shows that a hydraulic cylinder 5 is fixed on the upper part of a top cover 4 of a valve body 1, a hydraulic rod 5a of the hydraulic cylinder 5 downwardly penetrates through a cylinder bottom 5b of the hydraulic cylinder 5 and the top cover 4 of the valve body 1 and extends into an inner cavity of the valve body 1, and a valve core 1c matched with the inner cavity of the valve body 1 is embedded outside the lower part of the hydraulic rod 5 a;
the hydraulic rod 5a is positioned at the upper part in the hydraulic cylinder 5 and is provided with a piston 5c matched with the hydraulic cylinder 5, a return spring 5d is sleeved outside the hydraulic rod 5a between the bottom of the piston 5c and the cylinder bottom 5b, and the lower end of the return spring 5d is fixed on the cylinder bottom 5 b; when the return spring 5d is completely compressed, the valve core 1c is positioned below the oil conveying oil inlet 1a and the oil conveying oil outlet 1 b; when the return spring 5d is in a release state of 2/3 and above, the valve core 1c completely blocks the oil inlet 1a of the oil transportation;
the top cover 4 of the valve body 1 extends to one side to form a pump seat 4 a; the upper part of the pump seat 4a is provided with an oil way control box 6 and an oil tank 7; the oil circuit control box 6 is provided with an electric hydraulic pump 8; the oil tank 7 is communicated with an oil inlet of the electric hydraulic pump 8 through an oil pipe I6 a in the oil way control box 6;
FIG. 2 shows that the oil outlet of the electric hydraulic pump 8 is connected with the oil inlet of a piezoelectric type high-speed switch valve I9 through an oil pipe II 6b in an oil passage control box 6, and the oil outlet of the piezoelectric type high-speed switch valve I9 is communicated with the top of the inner cavity of the hydraulic cylinder 5 through an oil pipe III 6c and an oil passage I5 f in the wall of the hydraulic cylinder 5;
an oil pipe II 6b in the oil way control box 6 is connected with an oil pipe IV 6d in parallel, the other end of the oil pipe IV 6d is connected with an oil inlet of a piezoelectric high-speed switch valve II 10, and an oil outlet of the piezoelectric high-speed switch valve II 10 is connected with a hydraulic control oil port of a hydraulic control one-way valve 11 through an oil pipe nine 6 m; an oil outlet of the hydraulic control one-way valve 11 is connected to the third oil pipe 6c in parallel through an oil pipe ten 6n, an oil inlet of the hydraulic control one-way valve 11 is communicated with one end of an oil pipe five 6e in the oil way control box 6, and the other end of the oil pipe five 6e is communicated with the oil tank 7;
the oil outlet of the electric hydraulic pump 8 is also connected with the oil inlet of the reversing valve 12 sequentially through an oil pipe II 6b and an oil pipe six 6f connected to the oil pipe II 6b in parallel; an oil outlet of the reversing valve 12 is communicated with the bottom of an inner cavity of the hydraulic cylinder 5 sequentially through an oil pipe seven 6h and an oil way two 5h in the wall of the hydraulic cylinder 5; the oil return port of the reversing valve 12 is communicated with the oil tank 7 through an oil pipe eight 6j in the oil way control box 6.
FIG. 2 shows that a filter 13 is connected in series to the first oil pipe 6a in the present example; the second oil pipe 6b is also connected with one end of a bypass oil pipe 6k in parallel, the other end of the bypass oil pipe 6k is communicated with the oil tank 7, and the bypass oil pipe 6k is connected with an overflow valve 14 in series.
In practical implementation, the first oil pipe to the tenth oil pipe and the bypass oil pipe in the oil path control box 5 of the present invention may be separately integrated into an oil path manifold block, and the piezoelectric type high-speed switching valve one 9, the piezoelectric type high-speed switching valve two 10, the reversing valve 12 and the hydraulic control check valve 11 are installed on the corresponding oil ports of the oil path manifold block. Compared with the mode that the first switch valve, the second switch valve, the reversing valve, the one-way valve and all oil pipes are arranged in the oil way control box, the structure is more compact.
Claims (2)
1. The utility model provides an electronic hydrostatic formula high pressure valve, includes that oil transportation oil inlet (1a) of valve body (1), valve body (1) links to each other with advancing oil pipe way (2a), and oil transportation oil-out (1b) of valve body (1) link to each other its characterized in that with going out oil pipe way (2 b):
a hydraulic cylinder (5) is fixed on the upper part of a top cover (4) of the valve body (1), a hydraulic rod (5a) of the hydraulic cylinder (5) downwards penetrates out of a cylinder bottom (5b) of the hydraulic cylinder (5) and the top cover (4) of the valve body (1) and extends into an inner cavity of the valve body (1), and a valve core (1c) matched with the inner cavity of the valve body (1) is embedded outside the lower part of the hydraulic rod (5 a);
the hydraulic rod (5a) is positioned at the upper part in the hydraulic cylinder (5) and is provided with a piston (5c) matched with the hydraulic cylinder (5), a return spring (5d) is sleeved outside the hydraulic rod (5a) between the bottom of the piston (5c) and the cylinder bottom (5b), and the lower end of the return spring (5d) is fixed on the cylinder bottom (5 b); when the return spring (5d) is completely compressed, the valve core (1c) is positioned below the oil conveying oil inlet (1a) and the oil conveying oil outlet (1 b); when the return spring (5d) is in a release state of 2/3 and above, the valve core (1c) completely blocks the oil transportation inlet (1 a);
the top cover (4) of the valve body (1) extends out to one side to form a pump seat (4 a); the upper part of the pump seat (4a) is provided with an oil way control box (6) and an oil tank (7); an electric hydraulic pump (8) is arranged on the oil way control box (6); the oil tank (7) is communicated with an oil inlet of the electric hydraulic pump (8) through a first oil pipe (6a) in the oil way control box (6);
an oil outlet of the electric hydraulic pump (8) is connected with an oil inlet of a piezoelectric type high-speed switch valve I (9) through an oil pipe II (6b) in the oil way control box (6), and an oil outlet of the piezoelectric type high-speed switch valve I (9) is communicated with the top of an inner cavity of the hydraulic cylinder (5) through an oil pipe III (6c) and an oil way I (5f) in the wall of the hydraulic cylinder (5);
an oil pipe II (6b) in the oil way control box (6) is connected with an oil pipe IV (6d) in parallel, the other end of the oil pipe IV (6d) is connected with an oil inlet of a piezoelectric type high-speed switch valve II (10), and an oil outlet of the piezoelectric type high-speed switch valve II (10) is connected with a hydraulic control oil port of a hydraulic control one-way valve (11) through an oil pipe nine (6 m); an oil outlet of the hydraulic control one-way valve (11) is connected to an oil pipe III (6c) in parallel through an oil pipe IV (6n), an oil inlet of the hydraulic control one-way valve (11) is communicated with one end of an oil pipe V (6e) in the oil way control box (6), and the other end of the oil pipe V (6e) is communicated with the oil tank (7);
an oil outlet of the electric hydraulic pump (8) is connected with an oil inlet of the reversing valve (12) sequentially through an oil pipe II (6b), an oil pipe six (6f) connected to the oil pipe II (6b) in parallel and the oil pipe six; an oil outlet of the reversing valve (12) is communicated with the bottom of the inner cavity of the hydraulic cylinder (5) sequentially through an oil pipe seven (6h) and an oil way two (5h) in the wall of the hydraulic cylinder (5); an oil return port of the reversing valve (12) is communicated with an oil tank (7) through an oil pipe eight (6j) in the oil way control box (6).
2. An electro-hydrostatic high pressure valve as defined in claim 1, wherein: a filter (13) is connected in series on the oil pipe I (6 a); the second oil pipe (6b) is also connected with one end of a bypass oil pipe (6k) in parallel, the other end of the bypass oil pipe (6k) is communicated with the oil tank (7), and the bypass oil pipe (6k) is connected with an overflow valve (14) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121487400.1U CN217003164U (en) | 2021-07-01 | 2021-07-01 | Electric hydrostatic high-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121487400.1U CN217003164U (en) | 2021-07-01 | 2021-07-01 | Electric hydrostatic high-pressure valve |
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| Publication Number | Publication Date |
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| CN217003164U true CN217003164U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121487400.1U Expired - Fee Related CN217003164U (en) | 2021-07-01 | 2021-07-01 | Electric hydrostatic high-pressure valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324059A (en) * | 2021-07-01 | 2021-08-31 | 西南交通大学 | Electric hydrostatic high-pressure valve |
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2021
- 2021-07-01 CN CN202121487400.1U patent/CN217003164U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324059A (en) * | 2021-07-01 | 2021-08-31 | 西南交通大学 | Electric hydrostatic high-pressure valve |
| CN113324059B (en) * | 2021-07-01 | 2024-08-16 | 西南交通大学 | Electric dynamic-static liquid type high-pressure valve |
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Granted publication date: 20220719 |
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