CN213541475U

CN213541475U - Petroleum valve switch actuator

Info

Publication number: CN213541475U
Application number: CN202022459885.5U
Authority: CN
Inventors: 刘新宇; 胡军; 王海东
Original assignee: Shanghai Essen Hydraulic System Co ltd
Current assignee: Shanghai Essen Hydraulic System Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-25
Anticipated expiration: 2030-10-29

Abstract

The application relates to a petroleum valve switch actuator, which relates to the technical field of petroleum valves.A gear pump is arranged on a closed oil tank and is provided with a motor; the gear pump is provided with a first liquid inlet pipe which is provided with a first, a second and a third two-position three-way electromagnetic valves communicated with the hydraulic oil cylinder; the hydraulic oil cylinder comprises a cylinder bottom, a cylinder body and a piston rod for dividing the cylinder body of the hydraulic oil cylinder into a rod cavity and a rodless cavity, the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are both communicated with the rodless cavity, and the third two-position three-way electromagnetic valve is communicated with the rod cavity; the first, second and third two-position three-way electromagnetic valves are provided with first return pipes which are communicated with the closed oil tank; the first two-position three-way electromagnetic valve is communicated with the rodless cavity; the rodless cavity is communicated with a second return pipe, and the second return pipe is communicated with the closed oil tank. The oil valve has the effect that when a pipeline in an on-off controller of the oil valve breaks down, the valve can limit the output of oil.

Description

Petroleum valve switch actuator

Technical Field

The application relates to the field of petroleum valve technology, in particular to a petroleum valve switch actuator.

Background

Valves are accessories for pipelines for opening and closing the pipeline, controlling flow direction, regulating and controlling parameters of the transport medium, and can be classified into shut-off valves, check valves, regulating valves, and the like according to their functions. In the use process of petroleum in the field of airplanes, pipeline transportation of petroleum is the most important part, and in the use transportation, a valve is the most important part, and the valve controls the output of petroleum through a switch controller.

At present, a switch controller of a petroleum valve is generally controlled by adopting a hydraulic oil cylinder, the common hydraulic oil cylinder is provided with two pipelines to move a piston rod in the hydraulic oil pipe back and forth, so that the petroleum valve is switched on and off, but when one pipeline breaks down, the switch controller can be always in an open state, so that the valve cannot limit petroleum output.

In view of the above-mentioned related art, the inventors have considered that there is a drawback that when one of the pipes in the on-off controller of the oil valve malfunctions, the valve cannot limit the output of oil.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that when a pipeline in an opening and closing controller of a petroleum valve breaks down, the valve cannot limit the output of petroleum, the application provides a petroleum valve opening and closing actuator.

The application provides a petroleum valve switch executor adopts following technical scheme:

a petroleum valve switch actuator comprises a closed oil tank, wherein a gear pump is communicated with the closed oil tank, and a motor is connected to the gear pump; a first liquid inlet pipe is communicated with the gear pump, and a first two-position three-way electromagnetic valve, a second two-position three-way electromagnetic valve and a third two-position three-way electromagnetic valve are sequentially communicated with one end, away from the gear pump, of the first liquid inlet pipe; the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the third two-position three-way electromagnetic valve are communicated with a hydraulic oil cylinder, the hydraulic oil cylinder comprises a cylinder bottom, a cylinder body and a piston rod, the cylinder body of the hydraulic oil cylinder is divided into a rod cavity and a rodless cavity by the piston rod, the first two-position three-way electromagnetic valve is communicated with the rodless cavity, the second two-position three-way electromagnetic valve is communicated with the rodless cavity, and the third two-position three-way electromagnetic valve is communicated with the; the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the third two-position three-way electromagnetic valve are provided with a first return pipe in a communication way, and the first return pipe is communicated with the closed oil tank; the first two-position three-way electromagnetic valve is communicated with the rodless cavity through a first connecting pipe, and a first one-way valve is arranged on the first connecting pipe; a second return pipe is communicated with the rodless cavity, one end, far away from the rodless cavity, of the second return pipe is communicated with the closed oil tank, and a second one-way valve is arranged on the second return pipe; the second one-way valve is communicated with a communicating pipe, one end of the communicating pipe, which is far away from the second one-way valve, is communicated with the first connecting pipe, and the communicating position is positioned between the first two-position three-way electromagnetic valve and the first one-way valve; the motor, the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the third two-position three-way electromagnetic valve are connected with a control box.

By adopting the technical scheme, under the normal operation state of the oil valve, the motor is started, the motor drives the gear pump, further, the oil in the closed oil tank is input into the first liquid inlet pipe, under the control of the control box, the oil enters the rodless cavity of the hydraulic oil cylinder through the first liquid inlet pipe and the second two-position three-way electromagnetic valve, the oil entering the rodless cavity pushes the piston rod to move in the cylinder body, the oil in the rod cavity returns to the closed oil tank through the third two-position three-way electromagnetic valve and the first return pipe under the extrusion of the piston rod, when the oil in the rod cavity is completely extruded, under the control of the control box, the oil in the first liquid inlet pipe enters the rod cavity through the third two-position three-way electromagnetic valve, the piston rod is pushed by the oil in the rod cavity, the oil in the rodless cavity is extruded, and the oil in the rodless cavity flows into the closed oil tank through the second two-position three, the opening and closing of the petroleum valve are realized, and the first check valve and the second check valve play a role in limiting the circulation of petroleum in the first connecting pipe and the first return pipe; when the second two-position three-way electromagnetic valve or the third two-position three-way electromagnetic valve is damaged, the second two-position three-way electromagnetic valve and the third two-position three-way electromagnetic valve stop running under the control of the control box, liquid in the first liquid inlet pipe enters the rodless cavity through the first two-position three-way electromagnetic valve and the first connecting pipe, oil enables the second one-way valve to be opened through the communicating pipe, the piston rod is pushed to move, oil in the rod cavity enters the closed oil tank through the second return pipe, when the oil in the rod cavity is completely extruded, the first two-position three-way electromagnetic valve stops running, the position of the piston rod is kept unchanged, and therefore when one pipeline in an opening controller of the oil valve breaks down, the valve can limit the output of the oil.

Optionally, a third check valve, a first normally open stop valve and a pressure reducing valve are sequentially arranged on the first liquid inlet pipe along the liquid inlet direction, and the third check valve, the first normally open stop valve and the pressure reducing valve are located between the gear pump and the first two-position three-way electromagnetic valve.

Through adopting above-mentioned technical scheme, under oil valve normal operating condition, the third check valve plays good anti-return effect, and first normally open stop valve can play the effect of damming to first feed liquor pipe, and the relief pressure valve is used for reducing the intraductal pressure of first feed liquor, is favorable to avoiding intraductal pressure too big and influence oil valve operation's stability.

Optionally, the second two-position three-way electromagnetic valve is communicated through a second connecting pipe, and a hydraulic control one-way valve and a first one-way throttle valve are sequentially arranged on the second connecting pipe along the liquid inlet direction; the first overflow pipe is communicated with the second connecting pipe, one end, far away from the second connecting pipe, of the first overflow pipe is communicated with the closed oil tank, and the first overflow pipe is provided with a first overflow valve.

By adopting the technical scheme, the hydraulic control one-way valve on the second connecting pipe can be used for controlling the backflow in the second connecting pipe under the normal operation state of the petroleum valve, and the first one-way throttle valve can control the flow of petroleum in the second connecting pipe so as to ensure that the petroleum valve stably operates; when the pressure in the pipe is increased suddenly, the first overflow valve is opened, so that part of petroleum flows into the closed oil tank through the first overflow valve, and further the pipeline is prevented from being damaged.

Optionally, the third two-position three-way electromagnetic valve is communicated with the rod cavity through a third connecting pipe, and a back pressure valve and a second one-way throttle valve are sequentially arranged on the third connecting pipe along the liquid inlet direction; and a second overflow pipe is communicated with the third connecting pipe, one end of the second overflow pipe, which is far away from the third connecting pipe, is communicated with the closed oil tank, and a second overflow valve is arranged on the second overflow pipe.

By adopting the technical scheme, under the normal operation state of the petroleum valve, the backpressure valve on the third connecting pipe adjusts the petroleum in the third connecting pipe to be stable pressure, so that the stable operation of the petroleum valve is facilitated; when the pressure in the pipe is increased suddenly, the second overflow valve is opened, so that part of petroleum flows into the closed oil tank through the second overflow valve, and further the pipeline is prevented from being damaged.

Optionally, a third overflow pipe is communicated with the closed oil tank, one end of the third overflow pipe, which is far away from the closed oil tank, is communicated with the first overflow pipe, and one end of the third overflow pipe, which is far away from the closed oil tank, is communicated with the second overflow pipe; and a third overflow valve is arranged on the third overflow pipe.

Through adopting above-mentioned technical scheme, when intraductal pressure increases suddenly, the third overflow valve is opened, makes partial oil flow into through the third overflow valve and seals the oil tank, and then is favorable to preventing to cause the damage to the pipeline.

Optionally, an oil absorption filter is arranged between the closed oil tank and the gear pump.

Through adopting above-mentioned technical scheme, under the normal operating condition of oil valve, the oil in the closed oil tank gets into first feed liquor pipe through the oil absorption filter, and then filters the waste residue in the oil, is favorable to improving the stability of oil valve operation.

Optionally, an energy storage pipe is communicated with the first liquid inlet pipe, and an energy accumulator is arranged at one end, far away from the first liquid inlet pipe, of the energy storage pipe; the energy storage pipe is sequentially provided with a pressure switch, a pressure gauge and a second normally open stop valve along the liquid inlet direction; a third return pipe is communicated with the energy accumulator, and a second normally closed stop valve is arranged on the third return pipe; and a fourth overflow pipe is communicated with the energy storage pipe, one end of the fourth overflow pipe, which is far away from the energy storage pipe, is communicated with the third return pipe, and a fourth overflow valve is arranged on the fourth overflow pipe.

By adopting the technical scheme, when the pressure in the first liquid inlet pipe is suddenly increased, the control box controls the pressure switch to be opened, the energy accumulator stores energy, when the pressure in the first liquid inlet pipe is suddenly reduced, the control box controls the pressure switch to be opened, and the energy accumulator releases the energy accumulation, so that the pressure in the pipeline is ensured to be stable, and the stability of the operation of the petroleum valve is improved; the pressure gauge is convenient for constantly observing the pressure in the pipeline; when the pressure in the energy storage pipe is suddenly increased, the fourth overflow valve is opened, so that part of oil flows into the closed oil tank through the fourth overflow valve, and further, the damage to the pipeline is favorably prevented.

Optionally, be provided with the hand pump on the closed oil tank, be provided with the second feed liquor pipe on the hand pump, the one end that the hand pump was kept away from to the second feed liquor pipe communicates first two-position three way solenoid valve, second two three way solenoid valve and third two three way solenoid valve along the feed liquor direction in proper order, is provided with the second normally closed stop valve on the second feed liquor pipe, and the second normally closed stop valve is located between hand pump and the first two three way solenoid valve.

Through adopting above-mentioned technical scheme, at the oil valve not in the running state nature, through during the second feed liquor pipe gets into the pipeline with the oil in the closed oil tank of hand pump, and then be convenient for debug and overhaul the oil valve.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the first two-position three-way electromagnetic valve and the second return pipe, the first two-position three-way electromagnetic valve is communicated with the first liquid inlet pipe and the rodless cavity, the second return pipe is communicated with the rod cavity, when the second two-position three-way electromagnetic valve or the third two-position three-way electromagnetic valve is damaged, under the control of the control box, the second two-position three-way electromagnetic valve and the third two-position three-way electromagnetic valve stop running, the liquid in the first liquid inlet pipe enters the rodless cavity through the first two-position three-way electromagnetic valve, the piston rod is pushed to move, the oil in the rod cavity enters the closed oil tank through the second return pipe, when the oil in the rod cavity is completely extruded out, the first two-position three-way electromagnetic valve stops running, the position of the piston rod is kept unchanged, and therefore the valve can limit the output of petroleum when one pipeline in a switch controller of the petroleum valve breaks down;

through setting up the second check valve, the second check valve sets up on first connecting pipe, and then plays good anti-return effect, makes the effect of the output of restriction oil that the oil valve can be more stable.

Drawings

Fig. 1 is an overall schematic view of an oil valve opening and closing actuator in an embodiment of the present application.

Description of reference numerals: 1. sealing the oil tank; 2. a gear pump; 3. a motor; 4. a first liquid inlet pipe; 5. a first two-position three-way solenoid valve; 6. a second two-position three-way electromagnetic valve; 7. a third two-position three-way electromagnetic valve; 8. a hydraulic cylinder; 81. a cylinder bottom; 82. a cylinder body; 821. a rod cavity; 822. a rodless cavity; 83. a piston rod; 9. a first return pipe; 10. a first connecting pipe; 11. a first check valve; 12. a second return pipe; 13. a second one-way valve; 14. a communicating pipe; 15. a control box; 16. a third check valve; 17. a first normally open stop valve; 18. a pressure reducing valve; 19. a second connecting pipe; 20. a hydraulic control check valve; 21. a first one-way throttle valve; 22. a first overflow pipe; 23. a first overflow valve; 24. a third connecting pipe; 25. a back pressure valve; 26. a second one-way throttle valve; 27. a second overflow tube; 28. a second overflow valve; 29. a third overflow pipe; 30. a third overflow valve; 31. an oil absorption filter; 32. an energy storage tube; 33. an accumulator; 34. a pressure switch; 35. a pressure gauge; 36. a second normally open stop valve; 37. a third return conduit; 38. a first normally closed stop valve; 39. a fourth overflow pipe; 40. a fourth spill valve; 41. a manual pump; 42. a second liquid inlet pipe; 43. a second normally closed shutoff valve.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses on-off controller of oil valve. Referring to fig. 1, the on-off controller of the petroleum valve comprises a cuboid-shaped closed oil tank 1, an oil absorption filter 31 is communicated with the closed oil tank 1, a gear pump 2 is communicated with the oil absorption filter 31, and a motor 3 is connected to the gear pump 2.

The gear pump 2 is communicated with a first liquid inlet pipe 4, the liquid inlet cross section of the first liquid inlet pipe 4 is circular, and one end of the first liquid inlet pipe 4, far away from the gear pump 2, is communicated with a first liquid inlet branch pipe, a second liquid inlet branch pipe and a third liquid inlet branch pipe. One end of the first liquid inlet branch pipe, which is far away from the first liquid inlet pipe 4, is connected with a first two-position three-way electromagnetic valve 5, and the first liquid inlet branch pipe is connected with a high-pressure inlet of the first two-position three-way electromagnetic valve 5. One end of the second liquid inlet branch pipe, which is far away from the first liquid inlet pipe 4, is connected with a second two-position three-way electromagnetic valve 6, and the second liquid inlet branch pipe is connected with a high-pressure inlet of the second two-position three-way electromagnetic valve 6. One end of the liquid inlet branch pipe III, which is far away from the first liquid inlet pipe 4, is connected with a third two-position three-way electromagnetic valve 7, and the liquid inlet branch pipe III is connected with a high-pressure inlet of the third two-position three-way electromagnetic valve 7.

The outlet of the first two-position three-way solenoid valve 5 is communicated with a first connecting pipe 10, the infusion section of the first connecting pipe 10 is circular, one end of the first connecting pipe 10, which is far away from the first two-position three-way solenoid valve 5, is connected with a hydraulic oil cylinder 8, the hydraulic oil cylinder 8 comprises a cylinder bottom 81, a cylinder body 82, a piston and a piston rod 83, the cylinder body 82 of the hydraulic oil cylinder 8 is divided into a rod cavity 821 and a rodless cavity 822 by the piston rod 83, and one end of the first connecting pipe 10, which is far away from the first two-position three-way solenoid valve 5. The outlet of the second two-position three-way solenoid valve 6 is communicated with a second connecting pipe 19, the infusion section of the second connecting pipe 19 is circular, and one end of the second connecting rod, which is far away from the second two-position three-way solenoid valve 6, is communicated with the rodless cavity 822. A third connecting pipe 24 is communicated with the outlet of the third two-position three-way electromagnetic valve 7, the infusion section of the third connecting pipe 24 is circular, and one end of the third connecting rod, which is far away from the third two-position three-way electromagnetic valve 7, is communicated with the rod cavity 821.

And a first return branch pipe is communicated with an oil return opening of the first two-position three-way electromagnetic valve 5, the cross section of an oil return of the first return pipe is circular, and a first return pipe 9 is communicated with the first return branch pipe far away from the first two-position three-way electromagnetic valve 5. And an oil return port of the second two-position three-way electromagnetic valve 6 is communicated with a second return branch pipe, the oil return section of the second return pipe is circular, and the second return branch pipe is far away from the first two-position three-way electromagnetic valve 5 and is communicated with the first return pipe 9. And an oil return port of the third two-position three-way electromagnetic valve 7 is communicated with a third return branch pipe, the oil return section of the third return pipe is circular, and the third return branch pipe is far away from the first two-position three-way electromagnetic valve 5 and is communicated with the first return pipe 9.

The first connecting pipe 10 is communicated with the second connecting pipe 19, the third connecting pipe 24 is communicated with the second return pipe 12, the return section of the second return pipe 12 is circular, and one end of the second return pipe 12 far away from the third connecting pipe 24 is communicated with the first return pipe 9.

The first two-position three-way electromagnetic valve 5, the second two-position three-way electromagnetic valve 6 and the third two-position three-way electromagnetic valve 7 are connected with a control box 15. So set up, and then realize when a pipeline in the on-off controller of oil valve breaks down, the effect that oil valve can limit the output of oil.

First feed liquor pipe 4 is gone up and has been set gradually third check valve 16 along the feed liquor direction, first normally open stop valve 17 and relief pressure valve 18, and third check valve 16, first normally open stop valve 17 and relief pressure valve 18 are located between gear pump 2 and the first two-position three way solenoid valve 5, under oil valve normal operating condition, first check valve 11 plays good anti-return effect, first normally open stop valve 17 can play the effect of damming to first feed liquor pipe 4, relief pressure valve 18 is used for reducing the pressure in first feed liquor pipe 4, be favorable to avoiding intraductal pressure too big and influence the stability of oil valve operation.

The first connecting pipe 10 is provided with a first one-way valve 11, the second return pipe 12 is provided with a second one-way valve 13, the second one-way valve 13 is communicated with the first connecting pipe 10 through a communicating pipe 14, and the communicating position of the second one-way valve is located between the first two-position three-way electromagnetic valve 5 and the first one-way valve 11, so that the petroleum in the pipes can be prevented from flowing backwards well.

The second connecting pipe 19 is sequentially provided with a hydraulic control one-way valve 20 and a first one-way throttle valve 21 along the liquid inlet direction, the hydraulic control one-way valve 20 is convenient for controlling the backflow in the second connecting pipe 19, and the first one-way throttle valve 21 can control the flow of the petroleum in the second connecting pipe 19, so that the petroleum valve can stably operate.

Back pressure valve 25 and second one-way throttle valve 26 have set gradually along the inlet liquid direction on the third connecting pipe 24, and the oil in the third connecting pipe 24 is adjusted to back pressure valve 25 for steady pressure, and then is favorable to the oil valve steady operation, and when the intraductal pressure increases suddenly, second overflow valve 28 is opened, makes partial oil flow in through second overflow valve 28 and seals oil tank 1, and then is favorable to preventing to cause the damage to the pipeline.

A first overflow pipe 22 is communicated with the joint of the first connecting pipe 10 and the second connecting pipe 19, the overflow section of the first overflow pipe 22 is circular, and one end of the first overflow pipe 22 far away from the second connecting pipe 19 is communicated with a third overflow pipe 29. A second overflow pipe 27 is communicated with the joint of the third connecting pipe 24 and the second return pipe 12, the overflow section of the second overflow pipe 27 is circular, and one end of the second overflow pipe 27 far away from the third connecting pipe 24 is communicated with a third overflow pipe 29. The end of the third overflow pipe 29 far away from the first overflow pipe 22 is communicated with the closed oil tank 1. The first overflow pipe 22 is provided with a first overflow valve 23, the second overflow pipe 27 is provided with a second overflow valve 28, and the third overflow pipe 29 is provided with a third overflow valve 30, so that when the pressure in the pipes is increased, the pipes can be protected well.

The intercommunication is provided with energy storage pipe 32 on first feed liquor pipe 4, the one end intercommunication that first feed liquor pipe 4 was kept away from to energy storage pipe 32 sets up on energy storage ware 33, energy storage pipe 32 has set gradually pressure switch 34 along the feed liquor direction, manometer 35 and second are normally opened stop valve 36, manometer 35 is convenient for observe the pressure in the pipeline constantly, pressure switch 34 controls opening and closing of energy storage ware 33, second is normally opened stop valve 36 and is played the effect of damming under the condition that energy storage pipe 32 does not use, and then be favorable to improving the stability of oil valve operation.

A third return pipe 37 is communicated with the energy storage pipe 32, one end of the return pipe, which is far away from the energy storage 33, is communicated with the first infusion pipe, and the third return pipe 37 is provided with a second normally closed stop valve 43. The energy storage pipe 32 is provided with a fourth overflow pipe 39 in a communicating mode, the communicating position is located between the second normally open stop valve 36 and the pressure switch 34, one end, far away from the energy storage pipe 32, of the fourth overflow pipe 39 is communicated with the third return pipe 37, the communicating position is located between the second normally closed stop valve 43 and the closed oil tank 1, and the fourth overflow pipe 39 is provided with a fourth overflow valve 40 so as to achieve a good protection effect on pipelines.

The intercommunication is provided with third defeated oil pipe on the defeated oil pipe of second, the intercommunication position is located between oil absorption filter 31 and gear pump 2, the one end intercommunication that second defeated oil pipe was kept away from to third defeated oil pipe sets up on manual pump 41, the intercommunication is provided with second feed liquor pipe 42 on the manual pump 41, the one end intercommunication that manual pump 41 was kept away from to second feed liquor pipe 42 sets up on first feed liquor pipe 4, the intercommunication position is located between first normally open stop valve 17 and the relief pressure valve 18, be provided with second normally closed stop valve 43 on the second feed liquor pipe 42, and then be convenient for debug the pipeline.

The implementation principle of the petroleum valve switch actuator in the embodiment of the application is as follows: under the normal operation state of the petroleum valve, the motor 3 is started, the motor 3 drives the gear pump 2, the petroleum in the closed oil tank 1 enters the oil absorption filter 31 through the first oil pipeline, enters the first liquid inlet pipe 4 from the oil absorption filter 31 through the second oil pipeline, sequentially passes through the first one-way valve 11, the first normally open stop valve 17 and the reducing valve 18, under the control of the control box 15, the petroleum enters the second connecting pipe 19 through the first liquid inlet pipe 4 and the second two-position three-way electromagnetic valve 6, sequentially passes through the hydraulic control one-way throttle valve 20 and the first one-way throttle valve 21, enters the rodless cavity 822 of the hydraulic oil cylinder 8, the petroleum entering the rodless cavity 822 pushes the piston rod 83 to move in the cylinder body 82, the petroleum in the rod cavity 821 enters the third connecting pipe 24 under the extrusion of the piston rod 83, sequentially passes through the second one-way throttle valve 26 and the back pressure valve 25, and, when the oil in the rod cavity 821 is completely squeezed out, under the control of the control box 15, the oil in the first liquid inlet pipe 4 enters the third connecting pipe 24 through the third two-position three-way electromagnetic valve 7, and then sequentially passes through the backpressure valve 25 and the second one-way throttle valve 26, so that the oil enters the rod cavity 821, the piston rod 83 is pushed by the oil in the rod cavity 821, the oil in the rodless cavity 822 is squeezed, the oil in the rodless cavity 822 enters the second connecting pipe 19 under the squeezing of the piston rod 83, sequentially passes through the first one-way throttle valve 21 and the hydraulic control one-way valve 20, and flows into the closed oil tank 1 through the second two-position three-way electromagnetic valve 6 and the first return pipe 9, so that the opening and closing of the oil valve are realized. When the second two-position three-way solenoid valve 6 or the third two-position three-way solenoid valve 7 is damaged, under the control of the control box 15, the second two-position three-way solenoid valve 6 and the third two-position three-way solenoid valve 7 stop operating, liquid in the first liquid inlet pipe 4 enters the first connecting pipe 10 through the first two-position three-way solenoid valve 5 and enters the rodless cavity 822 through the second one-way valve 13, the piston rod 83 is pushed to move, oil in the rod cavity 821 enters the first return pipe 9 through the second return pipe 12 and the third one-way valve 16 and then enters the closed oil tank 1, when the oil in the rod cavity 821 is completely extruded, the first two-position three-way solenoid valve 5 stops operating, the piston rod 83 is kept unchanged, and therefore when one pipeline in an opening and closing controller of the oil valve fails, the valve can limit the output of the oil.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A petroleum valve switch executor which characterized in that: the oil tank comprises a closed oil tank (1), wherein a gear pump (2) is communicated with the closed oil tank (1), and a motor (3) is connected to the gear pump (2); a first liquid inlet pipe (4) is communicated with the gear pump (2), and a first two-position three-way electromagnetic valve (5), a second two-position three-way electromagnetic valve (6) and a third two-position three-way electromagnetic valve (7) are sequentially communicated with one end, away from the gear pump (2), of the first liquid inlet pipe (4); the first two-position three-way electromagnetic valve (5), the second two-position three-way electromagnetic valve (6) and the third two-position three-way electromagnetic valve (7) are communicated with each other to be provided with a hydraulic oil cylinder (8), each hydraulic oil cylinder (8) comprises a cylinder bottom (81), a cylinder body (82) and a piston rod (83), the piston rod (83) divides the cylinder body (82) of each hydraulic oil cylinder (8) into a rod cavity (821) and a rodless cavity (822), the first two-position three-way electromagnetic valve (5) is communicated with the rodless cavity (822), the second two-position three-way electromagnetic valve (6) is communicated with the rodless cavity (822), and the third two-position three-way electromagnetic valve (7) is communicated with the rod; a first return pipe (9) is communicated with the first two-position three-way electromagnetic valve (5), the second two-position three-way electromagnetic valve (6) and the third two-position three-way electromagnetic valve (7), and the first return pipe (9) is communicated with the closed oil tank (1); the first two-position three-way electromagnetic valve (5) is communicated with the rodless cavity (822) through a first connecting pipe (10), and a first one-way valve (11) is arranged on the first connecting pipe (10); a second return pipe (12) is communicated with the rodless cavity (822), one end, far away from the rodless cavity (822), of the second return pipe (12) is communicated with the closed oil tank (1), and a second one-way valve (13) is arranged on the second return pipe (12); a communicating pipe (14) is communicated with the second one-way valve (13), one end, far away from the second one-way valve (13), of the communicating pipe (14) is communicated with the first connecting pipe (10), and the communicating position is located between the first two-position three-way electromagnetic valve (5) and the first one-way valve (11); the motor (3), the first two-position three-way electromagnetic valve (5), the second two-position three-way electromagnetic valve (6) and the third two-position three-way electromagnetic valve (7) are connected with a control box (15).

2. The petroleum valve switch actuator of claim 1, wherein: a third one-way valve (16), a first normally-open stop valve (17) and a pressure reducing valve (18) are sequentially arranged on the first liquid inlet pipe (4) along the liquid inlet direction, and the third one-way valve (16), the first normally-open stop valve (17) and the pressure reducing valve (18) are located between the gear pump (2) and the first two-position three-way electromagnetic valve (5).

3. The petroleum valve switch actuator of claim 1, wherein: the second two-position three-way electromagnetic valve (6) is communicated through a second connecting pipe (19), and a hydraulic control one-way valve (20) and a first one-way throttle valve (21) are sequentially arranged on the second connecting pipe (19) along the liquid inlet direction; the second connecting pipe (19) is provided with a first overflow pipe (22) in a communicating mode, one end, far away from the second connecting pipe (19), of the first overflow pipe (22) is communicated and arranged on the closed oil tank (1), and the first overflow pipe (22) is provided with a first overflow valve (23).

4. The petroleum valve switch actuator of claim 3, wherein: the third two-position three-way electromagnetic valve (7) is communicated with the rod cavity (821) through a third connecting pipe (24), and a back pressure valve (25) and a second one-way throttle valve (26) are sequentially arranged on the third connecting pipe (24) along the liquid inlet direction; a second overflow pipe (27) is communicated with the third connecting pipe (24), one end, far away from the third connecting pipe (24), of the second overflow pipe (27) is communicated with the closed oil tank (1), and a second overflow valve (28) is arranged on the second overflow pipe (27).

5. The petroleum valve switch actuator of claim 4, wherein: a third overflow pipe (29) is communicated with the closed oil tank (1), one end, far away from the closed oil tank (1), of the third overflow pipe (29) is communicated with the first overflow pipe (22), and one end, far away from the closed oil tank (1), of the third overflow pipe (29) is communicated with the second overflow pipe (27); and a third overflow valve (30) is arranged on the third overflow pipe (29).

6. The petroleum valve switch actuator of claim 1, wherein: an oil absorption filter (31) is arranged between the closed oil tank (1) and the gear pump (2).

7. The petroleum valve switch actuator of claim 1, wherein: an energy storage pipe (32) is communicated with the first liquid inlet pipe (4), and an energy accumulator (33) is arranged at one end, far away from the first liquid inlet pipe (4), of the energy storage pipe (32); the energy storage pipe (32) is sequentially provided with a pressure switch (34), a pressure gauge (35) and a second normally open stop valve (36) along the liquid inlet direction; a third return pipe (37) is communicated with the energy accumulator (33), and a second normally closed stop valve (43) is arranged on the third return pipe (37); a fourth overflow pipe (39) is communicated with the energy storage pipe (32), one end of the fourth overflow pipe (39), which is far away from the energy storage pipe (32), is communicated with the third return pipe (37), and a fourth overflow valve (40) is arranged on the fourth overflow pipe (39).

8. The petroleum valve switch actuator of claim 1, wherein: the oil-saving oil tank is characterized in that a manual pump (41) is arranged on the closed oil tank (1), a second liquid inlet pipe (42) is arranged on the manual pump (41), one end, far away from the manual pump (41), of the second liquid inlet pipe (42) is sequentially communicated with a first two-position three-way electromagnetic valve (5), a second two-position three-way electromagnetic valve (6) and a third two-position three-way electromagnetic valve (7) along the liquid inlet direction, a second normally closed stop valve (43) is arranged on the second liquid inlet pipe (42), and the second normally closed stop valve (43) is located between the manual pump (41) and the first two-position three-way electromagnetic valve (5).