CN116447378B - Step driving device for underwater throttle valve of double-acting oil cylinder and using method of step driving device - Google Patents

Step driving device for underwater throttle valve of double-acting oil cylinder and using method of step driving device Download PDF

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Publication number
CN116447378B
CN116447378B CN202310707072.9A CN202310707072A CN116447378B CN 116447378 B CN116447378 B CN 116447378B CN 202310707072 A CN202310707072 A CN 202310707072A CN 116447378 B CN116447378 B CN 116447378B
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oil
communicated
cavity
oil return
duct
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CN116447378A (en
Inventor
刘书杰
于小涛
王武海
段家明
葛居良
孙雪飞
郭晓晓
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Weifei Marine Equipment Manufacturing Co ltd
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Weifei Marine Equipment Manufacturing Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The application discloses a stepping driving device of an underwater throttle valve of a double-acting oil cylinder and a using method thereof, and relates to the field of marine oil and gas exploration drilling equipment; the first driving cavity is communicated with the second oil return cavity through a first oil duct, and the second driving cavity is communicated with the first oil return cavity through a second oil duct; when the first oil duct is communicated with the oil supply pipe, the communication between the first oil duct and the oil return pipe is interrupted; when the first oil duct is communicated with the oil return pipe, the communication between the first oil duct and the oil supply pipe is interrupted; when the second oil duct is communicated with the oil supply pipe, the communication between the second oil duct and the oil return pipe is interrupted; when the second oil duct is communicated with the oil return pipe, the communication between the second oil duct and the oil supply pipe is interrupted. The application improves the driving efficiency of the underwater throttle valve.

Description

Step driving device for underwater throttle valve of double-acting oil cylinder and using method of step driving device
Technical Field
The application relates to the field of marine petroleum and natural gas exploration drilling equipment, in particular to an underwater throttle valve stepping driving device of a double-acting oil cylinder and a using method thereof.
Background
The underwater Christmas tree is widely applied to the exploitation process of the underwater oil and gas field and is very important equipment in the exploitation process. The underwater recoverable throttle valve is one of main components of the underwater Christmas tree and is positioned in a production channel of the Christmas tree, and the main functions of the underwater recoverable throttle valve are to regulate the flow of production medium, stabilize the pressure of the medium, control the energy of an oil-gas layer, prolong the self-injection period, optimize the production of an oil-gas well and the like.
The underwater throttle valve is a complex system integrating a machine, electricity and liquid, has severe service conditions, and has the functions of resisting external seawater pressure and seawater corrosion, remote control, electric signal transmission, data feedback and the like while realizing accurate flow regulation.
The conventional deepwater underwater throttle valve and the control system are integrated on the underwater christmas tree, the distance between the throttle valve and the control system is short, usually 3m-4m, an oil return pipeline is short, and oil return can be directly discharged from sea. A recoverable throttle valve for shallow water, typically separate from a control system mounted on the subsea manifold 20m-50m from the throttle valve; meanwhile, according to the environmental protection requirement, the permission that the oil return is not allowed to drain the sea exists in the shallow water sea area, and the oil return is required to return to the offshore platform which is several kilometers away from the throttle valve.
The driver of the underwater throttle valve has various types, wherein the double-acting oil cylinder driving device is a driver which is more commonly used for driving the underwater throttle valve, for example, the patent of the application with the application number of 202210663640.5 discloses a long-distance high-efficiency driving underwater recoverable throttle valve, and a specific scheme for driving the underwater throttle valve by adopting the double-acting oil cylinder driving device is disclosed; in addition, the double springs are adopted to increase the resilience force of the spring driving piston to reset when the oil cylinder is depressurized, so that the spring has enough pushing force to push the control oil in the oil cylinder back to the hydraulic pump system outside a few kilometers; on the other hand, by designing the driving oil cylinder with short stroke and small diameter, the area of the driving cavity in the oil cylinder is reduced, so that the oil return speed in the oil return pipeline is reduced, the pressure resistance in the oil return pipeline is reduced, and the oil return time of the oil cylinder is reduced.
However, it is found through practice that although the application patent with application number 202210663640.5 improves the oil return capability of the oil cylinder to a certain extent, the piston of the oil cylinder is pushed to reset only by a spring, but when the piston is reset, oil in a driving cavity of the oil cylinder needs to be pushed to enter an oil return pipeline to return to an oil tank of a hydraulic system or enter a sea drainage check valve to drain the sea, and the oil return resistance is large because the oil return pipeline is often up to several kilometers and the sea drainage check valve drain pressure is 100 psi; meanwhile, the oil return rate is mainly limited by the elastic force of a spring, the space of the driver is limited, the design of the spring is smaller, the pressure generated by pushing the piston is smaller, the discharge pressure of the sea-discharging check valve and the flow resistance of an oil return pipeline are required to be overcome, the oil return rate of the throttle valve driver is low, and the driving efficiency of the driver is low, so that the requirements of long-distance oil return working conditions of several kilometers and sea-discharging working conditions of the deep water underwater throttle valve control liquid are still difficult to meet in the existing patent.
Disclosure of Invention
The application aims to provide a stepping driving device for an underwater throttle valve of a double-acting oil cylinder and a using method thereof, which are used for solving the problems in the prior art, improving the oil return rate of the oil cylinder in a driver of the underwater throttle valve and further improving the driving efficiency of the underwater throttle valve.
In order to achieve the above object, the present application provides the following solutions:
the application provides an underwater throttle valve stepping driving device of a double-acting oil cylinder, which comprises a first driving cavity and a first oil return cavity, wherein a piston of an open-circuit oil cylinder is positioned between the first driving cavity and the first oil return cavity, a closed-circuit oil cylinder comprises a second driving cavity and a second oil return cavity, and a piston of the closed-circuit oil cylinder is positioned between the second driving cavity and the second oil return cavity; the first driving cavity is communicated with the second oil return cavity through a first oil duct, and the second driving cavity is communicated with the first oil return cavity through a second oil duct;
when the first oil duct is communicated with the oil supply pipe, the communication between the first oil duct and the oil return pipe is interrupted; when the first oil duct is communicated with the oil return pipe, the communication between the first oil duct and the oil supply pipe is interrupted;
when the second oil duct is communicated with the oil supply pipe, the communication between the second oil duct and the oil return pipe is interrupted; and when the second oil duct is communicated with the oil return pipe, the communication between the second oil duct and the oil supply pipe is interrupted.
Preferably, the first oil passage is communicated with the oil supply pipe or the oil return pipe through a first two-position three-way valve; the second two-position three-way valve of the second oil passage is communicated with the oil supply pipe or the oil return pipe.
Preferably, the first oil duct is communicated with a P port of the first two-position three-way valve, the oil supply pipe is communicated with an A port of the first two-position three-way valve, and the oil return pipe is communicated with a B port of the first two-position three-way valve; the second oil duct is communicated with the P port of the second two-position three-way valve, the oil supply pipe is communicated with the A port of the second two-position three-way valve, and the oil return pipe is communicated with the B port of the second two-position three-way valve.
The application also provides a use method of the underwater throttle valve stepping driving device of the double-acting oil cylinder, which comprises the following steps:
when the open-circuit oil cylinder is pressed: the first oil duct is communicated with an oil supply pipe, the second oil duct is communicated with an oil return pipe, oil in an oil tank is pumped into a first driving cavity and a second oil return cavity through the oil supply pipe, the volume of the first oil return cavity is reduced, and the oil in the first oil return cavity is pressed into the oil return pipe;
when the open-circuit oil cylinder is depressurized: the first oil duct and the second oil duct are respectively communicated with the oil return pipe, and oil in the first driving cavity flows into the first oil return cavity through the first oil duct, the oil return pipe and the second oil duct;
when the closing oil cylinder is pressed: the second oil duct is communicated with the oil supply pipe, the first oil duct is communicated with the oil return pipe, oil in the oil tank is pumped into the second driving cavity and the first oil return cavity through the oil supply pipe, the volume of the second oil return cavity is reduced, and the oil in the second oil return cavity is pressed into the oil return pipe;
when the closing oil cylinder is depressurized: and the second oil duct and the first oil duct are respectively communicated with the oil return pipe, and oil in the second driving cavity flows into the second oil return cavity through the second oil duct, the oil return pipe and the first oil duct.
Compared with the prior art, the application has the following technical effects:
the stepping driving device for the underwater throttle valve of the double-acting oil cylinder and the using method thereof improve the oil return rate of the oil cylinder in the driver of the underwater throttle valve, thereby improving the driving efficiency of the underwater throttle valve.
The open-circuit oil cylinder and the shut-off oil cylinder in the double-acting oil cylinder underwater throttle valve stepping driving device are double-acting oil cylinders, so that the problems of long-distance oil return of the single-acting oil cylinder and sea discharge resistance of the deep sea check valve are solved, oil in an oil return cavity is pressed into a long-distance oil return pipeline by a piston or discharged to the sea by the check valve when the double-acting oil cylinder driving cavity is driven by pressing, oil return or sea discharge by the small elastic force of a spring is avoided, the oil return capability is high, the oil return time is quick, and the driving efficiency is high.
The driving cavity of the open-circuit oil cylinder is communicated with the oil return cavity of the closed-circuit oil cylinder through the first oil duct, meanwhile, the driving cavity of the closed-circuit Lu Yougang is communicated with the oil return cavity of the open-circuit oil cylinder through the second oil duct, and control liquid is led into the oil return cavity of the closed-circuit oil cylinder through the first oil duct when the driving cavity of the open-circuit oil cylinder is pressurized for driving, so that the closed-circuit pawl is always in a reset state when the open-circuit oil cylinder is driven, the phenomenon that the piston and the pawl are pushed by the closed-circuit oil cylinder to engage with the driving gear when the open-circuit oil cylinder is driven due to external water pressure abnormality factors is prevented, one-way driving is guaranteed, the other way is completely in situ, and the driving pawl and the driving gear transmission mechanism are prevented from being damaged.
When the driving cavity of the open-circuit oil cylinder is depressurized, the driving cavity of the open-circuit oil cylinder is communicated with the oil return cavity of the open-circuit oil cylinder through the first oil duct, the oil return pipe and the second oil duct, oil in the driving cavity of the open-circuit oil cylinder automatically flows into the oil return cavity of the open-circuit oil cylinder, and oil stored in the oil return cavity of the open-circuit oil cylinder is pressed into a loop pipeline under the driving of a piston when the driving cavity of the open-circuit oil cylinder is pressurized, so that the oil return speed is high and the time is short, and the driving efficiency of the underwater throttle valve is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a part of the structure of a step-by-step driving device of an underwater throttle valve of a double-acting oil cylinder;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic diagram of a portion of the present application double acting cylinder underwater throttle step-by-step drive;
FIG. 4 is a partial enlarged view at B in FIG. 1;
FIG. 5 is a hydraulic schematic diagram of the double-acting cylinder underwater throttle valve step-by-step driving device of the application during the opening of the open cylinder;
FIG. 6 is a hydraulic schematic diagram of the double-acting cylinder underwater throttle valve step-by-step driving device of the present application when the open cylinder is depressurized;
1, a first inner hexagon bolt; 2. a first O-ring; 3. a first T-ring seal; 4. a first wear ring; 5. a second T-shaped sealing ring; 6. a second wear ring; 7. a PTFT seal ring; 8. a piston; 9. a second O-ring; 10. a third O-ring; 11. a third T-shaped sealing ring; 12. a third wear ring; 13. a cylinder head; 14. an oil cylinder body; 15. medium pressure plug; 16. a second oil passage; 17. sealing sleeve; 18. limiting the release pin; 19. a driving arm; 20. a pawl fixing pin; 21. a torsion spring; 22. a pawl; 23. a drive gear; 24. an outer spring; 25. an inner spring; 26. a guide rod; 27. a second socket head cap screw; 28. a driver housing; 29. an open-circuit oil cylinder; 291. a first drive chamber; 292. a first oil return cavity; 30. a road closing oil cylinder; 301. a second drive chamber; 302. a second oil return chamber; 31. a first oil passage; 32. a first two-position three-way valve; 33. a second two-position three-way valve; 34. an oil supply pipe; 35. an oil return pipe; 36. and an oil tank.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application aims to provide a stepping driving device for an underwater throttle valve of a double-acting oil cylinder and a using method thereof, which are used for solving the problems in the prior art, improving the oil return rate of the oil cylinder in a driver of the underwater throttle valve and further improving the driving efficiency of the underwater throttle valve.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-6, the present embodiment provides a step-by-step driving device for an underwater throttle valve of a double-acting oil cylinder, an open-circuit oil cylinder 29 includes a first driving chamber 291 and a first oil return chamber 292, a piston 8 of the open-circuit oil cylinder 29 is located between the first driving chamber 291 and the first oil return chamber 292, a closed-circuit oil cylinder 30 includes a second driving chamber 301 and a second oil return chamber 302, and the piston 8 of the closed-circuit oil cylinder 30 is located between the second driving chamber 301 and the second oil return chamber 302.
Specific: the oil cylinder main body of the double-acting oil cylinder underwater throttle valve stepping driving device comprises an oil cylinder cover 13, an oil cylinder body 14 and a driver shell 28, wherein the oil cylinder cover 13 is attached to one end face of the oil cylinder body 14, and the other end face of the oil cylinder body 14 is attached to an external tangent plane of the driver shell 28; the oil cylinder cover 13, the oil cylinder body 14 and the driver shell 28 are tightly connected together through at least two first inner hexagon bolts 1; two first O-shaped rings 2 used for sealing are arranged between the oil cylinder cover 13 and the oil cylinder body 14 in a clamping way. Two second O-rings 9 are sandwiched between the inner bore of the driver housing 28 and the cylinder body 14.
Two double-acting oil cylinders are formed in the oil cylinder main body, one of the double-acting oil cylinders is used as an open-circuit oil cylinder 29, and the other double-acting oil cylinder is used as a closed-circuit oil cylinder 30; the two double-acting oil cylinders have the same structure.
Referring to fig. 2, taking the double-acting oil cylinder on the right side in fig. 2 as an example, in this embodiment, the oil cylinder on the right side in fig. 2 is taken as a closing oil cylinder 30, the closing oil cylinder 30 includes a second driving cavity 301, a piston 8, a piston rod and a second oil return cavity 302, the piston 8 is fixedly sleeved on the piston rod, a cavity between the bottom surface of the piston rod and the oil cylinder cover 13 is taken as the second driving cavity 301, and a cavity between the side wall of the piston rod above the piston 8 and the oil cylinder body 14 is taken as the second oil return cavity 302; two first T-shaped sealing rings 3 and a first wear-resistant ring 4 are arranged between the bottom end of the piston rod and the blind hole of the oil cylinder cover 13; a second T-shaped sealing ring 5, a second wear-resistant ring 6 and a PTFT sealing ring 7 are clamped between the side wall of the piston 8 and the inner wall of the oil cylinder body 14; a sealing sleeve 17 is arranged between the top of the piston rod and the oil cylinder body, an inner hole of the sealing sleeve 17 is in sliding fit with the piston rod, and a third T-shaped sealing ring 11 and a third wear-resistant ring 12 are clamped between the inner hole of the sealing sleeve 17 and the piston rod; two third O-shaped rings 10 are arranged on the outer circular surface of the sealing sleeve 17, and the bottom surface of the sealing sleeve 17 is attached to the inner end surface of the oil cylinder body 14. The double-acting cylinder on the left side in fig. 2 serves as an open cylinder 29, and the structure of the open cylinder 29 is the same as that of the closed cylinder 30, and will not be described here again.
In the step driving device for the underwater throttle valve of the double-acting oil cylinder, two double-acting oil cylinders are required to drive a driving gear 23 of the throttle valve to rotate through one transmission mechanism respectively, the two transmission mechanisms have the same structure, and each transmission mechanism comprises a piston 8, a driving arm 19, a pawl 22, a pawl fixing pin 20, a torsion spring 21, a limiting release pin 18 and a spring mechanism; the spring mechanism comprises a spring support plate and a spring assembly comprising an inner spring 25 and an outer spring 24; the driver housing 28 is provided with a guide rod 26, and the top end of the guide rod 26 is connected with the driver housing 28 through a second socket head cap bolt 27.
It should be noted that, the step driving device for the underwater throttle valve of the double-acting cylinder of the present embodiment is an improvement on the basis of the underwater retractable throttle valve (hereinafter referred to as prior art 1) which is disclosed in the patent application No. 202210663640.5, and the improvement of the present application is mainly the improvement of the double-acting cylinder, and the structure and working principle of the body structure of the throttle valve and the above-mentioned transmission mechanism of the present application are the same as those of the throttle valve and the transmission mechanism described in prior art 1, and are described in detail in prior art 1, so that the description is omitted in the present embodiment.
In the present embodiment, a first oil duct 31 and a second oil duct 16 are provided in an oil cylinder body 14 in the step driving device for an underwater throttle valve of a double-acting oil cylinder, a first driving cavity 291 is communicated with a second oil return cavity 302 through the first oil duct 31, and a second driving cavity 301 is communicated with a first oil return cavity 292 through the second oil duct 16.
The step driving device of the underwater throttle valve of the double-acting oil cylinder can realize the following steps: when the first oil passage 31 communicates with the oil supply pipe 34, communication between the first oil passage 31 and the oil return pipe 35 is interrupted; when the first oil passage 31 communicates with the oil return pipe 35, communication between the first oil passage 31 and the oil supply pipe 34 is interrupted; when the second oil passage 16 communicates with the oil supply pipe 34, communication between the second oil passage 16 and the oil return pipe 35 is interrupted; when the second oil passage 16 communicates with the oil return pipe 35, communication between the second oil passage 16 and the oil supply pipe 34 is interrupted.
In the present embodiment, the first oil passage 31 communicates with the oil supply pipe 34 or the oil return pipe 35 through the first two-position three-way valve 32; the second two-position three-way valve 33 of the second oil passage 16 communicates with the oil supply pipe 34 or the oil return pipe 35. Specific: the first oil duct 31 is communicated with the P port of the first two-position three-way valve 32, the oil supply pipe 34 is communicated with the A port of the first two-position three-way valve 32, and the oil return pipe 35 is communicated with the B port of the first two-position three-way valve 32; the second oil passage 16 communicates with the P port of the second two-position three-way valve 33, the oil supply pipe 34 communicates with the a port of the second two-position three-way valve 33, and the oil return pipe 35 communicates with the B port of the second two-position three-way valve 33.
In this embodiment, since the first oil passage 31 and the second oil passage 16 are both opened in the cylinder body 14, and the first two-position three-way valve 32 and the second two-position three-way valve 33 are inconvenient to be provided in the cylinder body 14, a first communication passage communicating with the first oil passage 31 and a second communication passage communicating with the second oil passage 16 are also provided in the cylinder body 14, a port of the first communication passage on the cylinder body 14 is communicated with a P port of the first two-position three-way valve 32 through a connecting pipe, and a port of the second communication passage on the cylinder body 14 is communicated with a P port of the second two-position three-way valve 33 through a connecting pipe; when no connection pipe is connected to the ports of the first communication passage and the second communication passage, a medium pressure plug 15 is usually provided for plugging and sealing the ports.
The embodiment also provides a use method of the underwater throttle valve stepping driving device of the double-acting oil cylinder, which comprises the following steps:
when the open-circuit oil cylinder 29 is pressed: the first oil passage 31 is communicated with the oil supply pipe 34, the second oil passage 16 is communicated with the oil return pipe 35, the oil in the oil tank 36 is pumped into the first driving cavity 291 and the second oil return cavity 302 through the oil supply pipe 34, the volume of the first oil return cavity 292 is reduced, and the oil in the first oil return cavity 292 is pressed into the oil return pipe 35;
when the open cylinder 29 is depressurized: the first oil passage 31 and the second oil passage 16 are respectively communicated with the oil return pipe 35, and oil in the first driving cavity 291 automatically flows into the first oil return cavity 292 through the first oil passage 31, the oil return pipe 35 and the second oil passage 16; since the oil in the first driving chamber 291 flows into the first oil return chamber 292, and the oil stored in the first oil return chamber 292 pumps high-pressure oil into the first driving chamber 291 when the open cylinder 29 is pressurized next time, the piston 8 of the open cylinder 29 compresses the volume of the first oil return chamber 292, and the oil stored in the first oil return chamber 292 is pressurized into the circuit line through the second oil passage 16, the second two-position three-way valve 33 under the driving of the piston 8 of the open cylinder 29; the oil return is realized while the pressure is applied, the oil return speed is high, the time is short, and the driving efficiency of the underwater throttle valve is improved.
Similarly, when the closing cylinder 30 is pressed: the second oil passage 16 is communicated with the oil supply pipe 34, the first oil passage 31 is communicated with the oil return pipe 35, the oil in the oil tank 36 is pumped into the second driving cavity 301 and the first oil return cavity 292 through the oil supply pipe 34, the volume of the second oil return cavity 302 is reduced, and the oil in the second oil return cavity 302 is pressed into the oil return pipe 35; when the closing cylinder 30 is depressurized: the second oil passage 16 and the first oil passage 31 are respectively communicated with the oil return pipe 35, and the oil in the second drive chamber 301 flows into the second oil return chamber 302 through the oil return pipe 35, the first oil passage 31.
Since the oil in the second driving chamber 301 flows into the second oil return chamber 302 when the closing cylinder 30 is depressurized, and the high-pressure oil is pumped into the second driving chamber 301 when the closing cylinder 30 is pressurized next time, the piston 8 of the closing cylinder 30 compresses the volume of the second oil return chamber 302, and the oil stored in the second oil return chamber 302 is pressurized into the loop pipeline through the first oil passage 31 and the first two-position three-way valve 32 under the driving of the piston 8 of the closing cylinder 30; the oil return is realized while the pressure is applied, the oil return speed is high, the time is short, and the driving efficiency of the underwater throttle valve is improved.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "top", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principles and embodiments of the present application have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.

Claims (4)

1. A step driving device of an underwater throttle valve of a double-acting oil cylinder is characterized in that: the open-circuit oil cylinder comprises a first driving cavity and a first oil return cavity, a piston of the open-circuit oil cylinder is positioned between the first driving cavity and the first oil return cavity, the closed-circuit oil cylinder comprises a second driving cavity and a second oil return cavity, and a piston of the closed-circuit oil cylinder is positioned between the second driving cavity and the second oil return cavity; the first driving cavity is communicated with the second oil return cavity through a first oil duct, and the second driving cavity is communicated with the first oil return cavity through a second oil duct;
when the first oil duct is communicated with the oil supply pipe, the communication between the first oil duct and the oil return pipe is interrupted; when the first oil duct is communicated with the oil return pipe, the communication between the first oil duct and the oil supply pipe is interrupted;
when the second oil duct is communicated with the oil supply pipe, the communication between the second oil duct and the oil return pipe is interrupted; when the second oil duct is communicated with the oil return pipe, the communication between the second oil duct and the oil supply pipe is interrupted;
the first oil passage and the second oil passage can communicate with the oil return pipe at the same time.
2. The double-acting oil cylinder underwater throttle valve step driving device according to claim 1, wherein: the first oil duct is communicated with the oil supply pipe or the oil return pipe through a first two-position three-way valve; the second oil duct is communicated with the oil supply pipe or the oil return pipe through a second two-position three-way valve.
3. The double-acting oil cylinder underwater throttle valve step driving device according to claim 2, wherein: the first oil duct is communicated with the P port of the first two-position three-way valve, the oil supply pipe is communicated with the A port of the first two-position three-way valve, and the oil return pipe is communicated with the B port of the first two-position three-way valve; the second oil duct is communicated with the P port of the second two-position three-way valve, the oil supply pipe is communicated with the A port of the second two-position three-way valve, and the oil return pipe is communicated with the B port of the second two-position three-way valve.
4. A method of using the double-acting cylinder underwater throttle stepping drive device as claimed in any one of claims 1 to 3, characterized in that:
when the open-circuit oil cylinder is pressed: the first oil duct is communicated with the oil supply pipe, the second oil duct is communicated with the oil return pipe, oil in an oil tank is pumped into the first driving cavity and the second oil return cavity through the oil supply pipe, the volume of the first oil return cavity is reduced, and the oil in the first oil return cavity is pressed into the oil return pipe;
when the open-circuit oil cylinder is depressurized: the first oil duct and the second oil duct are respectively communicated with the oil return pipe, and oil in the first driving cavity flows into the first oil return cavity through the first oil duct, the oil return pipe and the second oil duct;
when the closing oil cylinder is pressed: the second oil duct is communicated with the oil supply pipe, the first oil duct is communicated with the oil return pipe, oil in the oil tank is pumped into the second driving cavity and the first oil return cavity through the oil supply pipe, the volume of the second oil return cavity is reduced, and the oil in the second oil return cavity is pressed into the oil return pipe;
when the closing oil cylinder is depressurized: and the second oil duct and the first oil duct are respectively communicated with the oil return pipe, and oil in the second driving cavity flows into the second oil return cavity through the second oil duct, the oil return pipe and the first oil duct.
CN202310707072.9A 2023-06-15 2023-06-15 Step driving device for underwater throttle valve of double-acting oil cylinder and using method of step driving device Active CN116447378B (en)

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CN211453970U (en) * 2019-12-28 2020-09-08 吉林大学 Controllable seismic source counter-force real-time adjusting system
CN114738540A (en) * 2022-06-14 2022-07-12 中海石油(中国)有限公司 But recovery type choke valve under long distance high-efficient drive water
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* Cited by examiner, † Cited by third party
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CN201495049U (en) * 2009-09-29 2010-06-02 四川建设机械（集团）股份有限公司 Jacking actuating unit for stacker crane
CN102444687A (en) * 2010-10-11 2012-05-09 伊卡路斯(苏州)车辆***有限公司 Constant pressure damping control and buffering system
CN102705280A (en) * 2012-06-25 2012-10-03 北京机械设备研究所 Hydraulic circuit avoiding hydraulic impact from causing out-of-tolerance of double-cylinder movement stroke
CN103434363A (en) * 2013-08-08 2013-12-11 常州万安汽车部件科技有限公司 Pitching-proof and heeling-proof hydraulic interconnected suspension system
CN106564579A (en) * 2016-11-22 2017-04-19 中船华南船舶机械有限公司 Hydraulic retractable fin stabilization buffer device
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CN211453970U (en) * 2019-12-28 2020-09-08 吉林大学 Controllable seismic source counter-force real-time adjusting system
CN114738540A (en) * 2022-06-14 2022-07-12 中海石油(中国)有限公司 But recovery type choke valve under long distance high-efficient drive water
CN115490189A (en) * 2022-10-11 2022-12-20 安徽合力股份有限公司 Distance adjusting system and control method for pallet fork distance

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