Pressure cylinder type hydraulic system of energy-saving pumping unit

Abstract

The utility model relates to the technical field of hydraulic pumping units, in particular to a pressure cylinder type hydraulic system of an energy-saving pumping unit, which comprises an oil tank, a large energy accumulator, a fan and a servo pressure cylinder, the surface of the oil tank is respectively communicated with a liquid supplementing electric pump through a pipeline, the surface of the liquid supplementing electric pump is fixedly connected with a liquid supplementing motor, and the servo pressure cylinder is fixedly connected with the large energy accumulator. A throat hole is formed in the surface of the main electric pump and communicates with a fifth ball valve through a pipeline, and the fifth ball valve communicates with the oil tank through a pipeline. The servo pressure cylinder is utilized to reduce energy consumption, the servo pressure cylinder is controlled to compress hydraulic oil, the hydraulic oil is compressed into the hydraulic oil cylinders, meanwhile, the left hydraulic oil cylinder and the right hydraulic oil cylinder can assist the other hydraulic oil cylinder to ascend under the condition of self weight, and the energy consumption can be saved by more than 30% in the process. The high controllability of the servo motor is utilized to control the rotating speed so as to control the stroke frequency of the hydraulic cylinder of the oil pumping unit.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pumping unit technology, specifically to a booster cylinder type hydraulic system for an energy-saving pumping unit. Background Technology

[0002] A hydraulic pumping unit is a beamless oil production equipment that uses a hydraulic system to achieve reciprocating motion. It is mainly used to replace traditional beam pumping units to meet the needs of deep oil reservoir development. Its core structure includes a hydraulic cylinder, a lifting pulley block, and a composite hoisting rope system. The load balance is achieved through the composite force design of the load-bearing rope and the main hoisting rope.

[0003] Currently, most countries use traditional beam pumping units or hydraulic pumping units to extract oil. Traditional beam pumping units have poor energy efficiency and low transmission efficiency, making it difficult to achieve energy savings. Due to their large size and weight, they are inconvenient to transport, install, maintain, and adjust parameters; the overall investment cost of the equipment is high. Hydraulic pumping units directly act on hydraulic cylinders for lifting, resulting in low kinetic energy recovery efficiency and generating a large amount of heat. Existing equipment has a slow stroke rate, non-adjustable stroke, and high electric motor energy consumption, making it not energy-efficient. Traditional pumping units can only extract oil one-to-one and have relatively low intelligence.

[0004] To solve the above technical problems, it is necessary to design a booster cylinder-type hydraulic system for an energy-saving oil pumping unit. Utility Model Content

[0005] The purpose of this utility model is to provide a booster cylinder type hydraulic system for an energy-saving oil pumping unit, which has the advantages of high transmission efficiency, reduced energy consumption, remote control, and reduced overall pump station motor power. It solves the problems of poor energy-saving effect, low transmission efficiency, inability to achieve better energy saving, inconvenient parameter adjustment, high power consumption, and low intelligence of traditional beam pumping units.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a booster cylinder type hydraulic system for an energy-saving oil pump, comprising an oil tank, a large accumulator, a fan, and a servo booster cylinder. The surface of the oil tank is connected to a replenishing electric pump via pipes. A replenishing electric motor is fixedly connected to the surface of the replenishing electric pump. The surface of the main electric pump is provided with a throat, which is connected to a fifth ball valve via a pipe. The fifth ball valve is connected to the oil tank via a pipe. A main electric motor is fixedly connected to the surface of the main electric pump. Both the replenishing electric pump and the main electric pump are connected to a third plate-type relief valve, which is connected to the oil tank via a pipe. Both the replenishing electric pump and the main electric pump are connected to a first check valve via pipes. A one-way valve is connected to a third ball valve via a pipe. The third ball valve is connected to an accumulator via a pipe. A filter element is installed on the surface of the oil tank. A return oil filter element is installed inside the oil tank. An electronic thermometer is installed through the surface of the oil tank. A fourth ball valve is connected to the surface of the large accumulator via a pipe. The fourth ball valve is connected to a first plate-type relief valve via a pipe. The first plate-type relief valve is connected to a second plate-type relief valve via a pipe. The second plate-type relief valve is connected to a second ball valve via a pipe. The filter element is connected to a first ball valve via a pipe. The first ball valve is connected to an electromagnetic relief valve via a pipe. A second monitoring valve is installed on the surface of the main electric pump. The second ball valve is connected to a hydraulic cylinder via a pipe.

[0007] Preferably, a thermometer is installed through the surface of the oil tank, and an oil unloading valve is connected to the surface of the oil tank.

[0008] Preferably, the surface of the oil tank is inlaid with an oil level window, and the top of the oil tank is threaded with an oil tank cap.

[0009] Preferably, the first check valve is connected to a hose connector via a pipe, and the hose connector is connected to a pressure gauge via a pipe.

[0010] Preferably, a pressure sensor is installed on the pipeline connected to the first one-way valve, the servo booster cylinder is connected to a proportional valve through a pipeline, and the proportional valve is connected to an electromagnetic directional valve through a pipeline.

[0011] Preferably, the proportional valve is connected to a threaded relief valve via a pipe, the threaded relief valve is connected to an accumulator oil circuit block via a pipe, the second ball valve is connected to a replenishment oil circuit block via a pipe, an electrical control cabinet is installed on the surface of the oil tank, the replenishment electric pump is connected to a first inlet pipe and a first monitoring valve respectively, the surface of the main electric pump is connected to a second inlet pipe, and the threaded relief valve is connected to a second check valve via a pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention utilizes a servo booster cylinder to reduce energy consumption. By controlling the servo booster cylinder, it compresses hydraulic oil and forces it into the hydraulic cylinder. Simultaneously, the left and right hydraulic cylinders assist the other hydraulic cylinder in rising under their own weight. This process saves more than 30% of energy. Utilizing the high controllability of the servo motor, the speed is controlled to control the stroke of the pumping unit's hydraulic cylinder, and the stroke can be remotely adjusted. By differentiating the cross-sectional area, the overall power of the pump station motor is reduced, achieving an energy saving effect of 50%. Compared to traditional pumping units, this energy-saving hydraulic pumping unit can operate in a one-to-two or one-to-one configuration (with an accumulator) for oil production. Attached Figure Description

[0014] Figure 1 This is a partial principle flow chart of the present utility model. Figure 1 ;

[0015] Figure 2 This is a partial principle flow chart of the present utility model. Figure 2 ;

[0016] Figure 3 This is a flowchart illustrating the overall principle of this utility model.

[0017] In the diagram: 1. Oil tank; 2. Unloading valve; 3. Oil tank cap; 4. Oil level window; 5. Electronic thermometer; 6. Thermometer; 7. First ball valve; 8. Fan; 9. Return oil filter element; 10. Filter element; 11. Fluid replenishment motor; 12. Fluid replenishment electric pump; 13. First inlet pipe; 14. First monitoring valve; 15. Main motor; 16. Main electric pump; 17. Second inlet pipe; 18. Second monitoring valve; 19. First check valve; 20. Second check valve; 21. Pressure gauge; 22. Hoses 23. Connector; 24. Solenoid relief valve; 25. Pressure sensor; 26. Second ball valve; 27. Solenoid directional valve; 28. Proportional valve; 29. ​​Threaded relief valve; 30. Accumulator; 31. Third ball valve; 32. Large accumulator; 33. Fourth ball valve; 34. First plate relief valve; 35. Throat; 36. Fifth ball valve; 37. Second plate relief valve; 38. Accumulator oil passage block; 39. Third plate relief valve; 40. Electrical control cabinet; 41. Servo booster cylinder; 42. Oil replenishment oil passage block. Detailed Implementation

[0018] Please see Figures 1-3A booster cylinder type hydraulic system for an energy-saving oil pump includes an oil tank 1, a large accumulator 31, a fan 8, and a servo booster cylinder 40. A replenishing electric pump 12 is connected to the surface of the oil tank 1 via pipes. A replenishing electric motor 11 is fixedly connected to the surface of the replenishing electric pump 12. A throat 34 is provided on the surface of the main electric pump 16, and a fifth ball valve 35 is connected to the throat 34 via a pipe. The fifth ball valve 35 is connected to the oil tank 1 via a pipe. A main electric motor 15 is fixedly connected to the surface of the main electric pump 16. Both the replenishing electric pump 12 and the main electric pump 16 are connected to a third plate-type relief valve 38, which is connected to the oil tank 1 via a pipe. Both the replenishing electric pump 12 and the main electric pump 16 are connected to a first check valve 19 via pipes. The system is connected to a third ball valve 30, which is connected to an accumulator 29 via a pipeline. A filter element 10 is installed on the surface of the oil tank 1, and a return oil filter element 9 is installed inside the oil tank 1. An electronic thermometer 5 is installed through the surface of the oil tank 1. A fourth ball valve 32 is connected to the surface of the large accumulator 31 via a pipeline. A first plate-type relief valve 33 is connected to the fourth ball valve 32 via a pipeline. A second plate-type relief valve 36 is connected to the first plate-type relief valve 33 via a pipeline. A second ball valve 25 is connected to the second plate-type relief valve 36 via a pipeline. A first ball valve 7 is connected to the filter element 10 via a pipeline. A solenoid relief valve 23 is connected to the first ball valve 7 via a pipeline. A second monitoring valve 18 is installed on the surface of the main electric pump 16. A hydraulic cylinder is connected to the second ball valve 25 via a pipeline.

[0019] This application provides a stable and adjustable power output for an energy-saving oil pumping unit. Through the coordinated operation of the replenishing electric pump 12 and the main electric pump 16, sufficient hydraulic oil supply can be ensured under different operating conditions, guaranteeing the normal operation of the oil pumping unit. The setting of multiple ball valves, overflow valves, and the first check valve 19 enables precise control of the flow direction, pressure, and flow rate of hydraulic oil, improving the stability and reliability of the system. The use of the accumulator 29 can store and release energy, reduce energy loss, and improve the energy-saving effect of the system. The filter element 10 filters the hydraulic oil entering the oil tank 1, effectively removing impurities and particles from the oil, preventing impurities from entering the system and damaging precision components, thus improving the reliability and service life of the system. The return oil filter element 9 filters the hydraulic oil returning to the oil tank 1 again, further purifying the oil, maintaining the cleanliness of the oil, and ensuring stable system performance. The electronic thermometer 5 monitors the temperature of the hydraulic oil in the oil tank 1 in real time, allowing operators to take timely measures based on the temperature display.

[0020] Please see Figure 1A thermometer 6 is installed through the surface of the oil tank 1, and an oil discharge valve 2 is connected to the surface of the oil tank 1. The thermometer 6 can monitor the temperature of the hydraulic oil in the oil tank 1 in real time. During the operation of the hydraulic system, the temperature of the hydraulic oil will change. Excessive temperature will affect the performance of the hydraulic oil and the stability of the system. By monitoring with the thermometer 6, the operator can take timely measures, such as starting the fan 8 for heat dissipation, to ensure that the system operates within a suitable temperature range. The oil discharge valve 2 facilitates the discharge of oil from the oil tank 1 during system maintenance, repair, or replacement of hydraulic oil, simplifying the operation process and improving maintenance efficiency.

[0021] Please see Figure 1 The surface of the oil tank 1 is inlaid with an oil level window 4, and the top of the oil tank 1 is threaded with an oil tank cover 3. The oil level window 4 allows the operator to intuitively observe the hydraulic oil level in the oil tank 1. During system operation, timely understanding of the oil level can prevent system failure due to insufficient oil. At the same time, the oil level changes can also be used to determine whether there are leaks or other problems in the system. The oil tank cover 3 is threaded, which not only ensures the sealing of the oil tank 1 and prevents dust, moisture and other impurities from entering the oil tank 1 and contaminating the hydraulic oil, but also makes it convenient to open the oil tank 1 for refueling, maintenance and other operations when needed.

[0022] Please see Figure 1 The first check valve 19 is connected to a hose connector 22 via a pipe. The hose connector 22 is connected to a pressure gauge 21 via a pipe. The hose connector 22 facilitates the connection of the hydraulic oil output from the first check valve 19 to other components via a hose, increasing the flexibility and convenience of system connection. The pressure gauge 21 can display the pressure at the output end of the first check valve 19 in real time. Operators can understand the working pressure of the system based on the reading of the pressure gauge 21, promptly detect pressure abnormalities and make adjustments, ensure that the system operates within a safe pressure range, and protect the safety of equipment and personnel.

[0023] Please see Figures 1-2 A pressure sensor 24 is installed on the pipeline connected to the first check valve 19. The servo booster cylinder 40 is connected to a proportional valve 27 through a pipeline. The proportional valve 27 is connected to an electromagnetic directional valve 26 through a pipeline. The pressure sensor 24 can monitor the pressure on the pipeline connected to the first check valve 19 in real time, so as to realize the accurate monitoring and control of the system pressure. The proportional valve 27 can continuously adjust the flow and pressure of the hydraulic oil according to the input signal, so that the system can flexibly adjust the output according to the actual working needs of the pumping unit, improve the adaptability and energy saving effect of the system. The electromagnetic directional valve 26 can change the flow direction of the hydraulic oil, thereby controlling the movement direction of the hydraulic cylinder, realizing the reciprocating motion of the pumping unit, and meeting the working requirements of the pumping unit.

[0024] Please see Figures 1-2The proportional valve 27 is connected to a threaded relief valve 28 via a pipe. The threaded relief valve 28 is connected to an accumulator oil circuit block 37 via a pipe. The second ball valve 25 is connected to a replenishment oil circuit block 41 via a pipe. An electrical control cabinet 39 is installed on the surface of the oil tank 1. The replenishment electric pump 12 is connected to the first inlet pipe 13 and the first monitoring valve 14 respectively. The surface of the main electric pump 16 is connected to the second inlet pipe 17. The threaded relief valve 28 is connected to a second check valve 20 via a pipe. The threaded relief valve 28 can further regulate and protect the system pressure. The setting of the accumulator oil circuit block 37 and the replenishment oil circuit block 41 makes the connection between the accumulator 29 and the replenishment system more standardized and convenient, which facilitates the installation, maintenance and management of the system. The electrical control cabinet 39, as the control center of the system, can integrate various control components and circuits to realize the automated control of the entire hydraulic system, improve the intelligence level and operation convenience of the system.

[0025] In use, start the main electric pump 16 and the replenishing electric pump 12. Use the replenishing electric pump 12 to fill the servo booster cylinder 40 and one end of the hydraulic cylinder with hydraulic oil at end P2. Press the start button, and the main electric pump 16 will enter from port A, pushing the servo booster cylinder 40 to end C. At this time, the replenishing electric pump 12 fills the P1 end with liquid until the hydraulic cylinder at end P1 moves to the position. The hydraulic cylinder receives a proximity switch signal, the replenishing pump group stops replenishing liquid, the proportional valve 27 starts and reverses, the servo booster cylinder 40 moves to ends B and D, pushing the hydraulic cylinder at end P2 to rise to the proximity switch. The proximity switch sends an electrical signal to the electrical control cabinet 39, the proportional valve 27 reverses, and the servo hydraulic cylinder moves back to end P1.

[0026] In summary, the booster cylinder hydraulic system of this energy-saving pumping unit solves the problems of poor energy-saving effect, low transmission efficiency, inability to achieve better energy saving, inconvenient parameter adjustment, high power consumption, and low intelligence of traditional beam pumping units.

Claims

1. A booster cylinder type hydraulic system for an energy-saving oil pump, comprising an oil tank (1), a large accumulator (31), a fan (8), and a servo booster cylinder (40), characterized in that: The surface of the oil tank (1) is connected to a replenishing electric pump (12) via a pipe. A replenishing electric motor (11) is fixedly connected to the surface of the replenishing electric pump (12). The surface of the main electric pump (16) is provided with a throat (34). The throat (34) is connected to a fifth ball valve (35) via a pipe. The fifth ball valve (35) is connected to the oil tank (1) via a pipe. The surface of the main electric pump (16) is fixedly connected to a main motor (15). Both the replenishing electric pump (12) and the main electric pump (16) are connected to a third plate overflow valve (38). The third plate overflow valve (38) is connected to the oil tank (1) via a pipe. Both the replenishing electric pump (12) and the main electric pump (16) are connected to a first check valve (19) via a pipe. The first check valve (19) is connected to a third ball valve (30) via a pipe. The third ball valve (30) is connected to... An accumulator (29) is provided. A filter element (10) is installed on the surface of the oil tank (1). A return oil filter element (9) is installed inside the oil tank (1). An electronic thermometer (5) is installed through the surface of the oil tank (1). A fourth ball valve (32) is connected to the surface of the large accumulator (31) via a pipe. A first plate-type relief valve (33) is connected to the fourth ball valve (32) via a pipe. A second plate-type relief valve (36) is connected to the first plate-type relief valve (33) via a pipe. A second ball valve (25) is connected to the second plate-type relief valve (36) via a pipe. A first ball valve (7) is connected to the filter element (10) via a pipe. An electromagnetic relief valve (23) is connected to the first ball valve (7) via a pipe. A second monitoring valve (18) is installed on the surface of the main electric pump (16). A hydraulic cylinder is connected to the second ball valve (25) via a pipe.

2. The booster cylinder type hydraulic system of an energy-saving oil pumping unit according to claim 1, characterized in that: A thermometer (6) is installed through the surface of the oil tank (1), and an oil unloading valve (2) is connected to the surface of the oil tank (1).

3. The booster cylinder type hydraulic system of an energy-saving oil pumping unit according to claim 1, characterized in that: The surface of the oil tank (1) is inlaid with an oil level window (4), and the top of the oil tank (1) is threaded with an oil tank cover (3).

4. The booster cylinder type hydraulic system of an energy-saving oil pumping unit according to claim 1, characterized in that: The first one-way valve (19) is connected to a hose connector (22) via a pipe, and the hose connector (22) is connected to a pressure gauge (21) via a pipe.

5. The booster cylinder type hydraulic system of an energy-saving oil pumping unit according to claim 1, characterized in that: A pressure sensor (24) is installed on the pipeline connected to the first check valve (19). The servo booster cylinder (40) is connected to a proportional valve (27) through a pipeline. The proportional valve (27) is connected to an electromagnetic directional valve (26) through a pipeline.

6. The booster cylinder type hydraulic system of an energy-saving oil pumping unit according to claim 5, characterized in that: The proportional valve (27) is connected to a threaded relief valve (28) via a pipe. The threaded relief valve (28) is connected to an accumulator oil circuit block (37) via a pipe. The second ball valve (25) is connected to a replenishment oil circuit block (41) via a pipe. An electrical control cabinet (39) is installed on the surface of the oil tank (1). The replenishment electric pump (12) is connected to a first inlet pipe (13) and a first monitoring valve (14) respectively. The surface of the main electric pump (16) is connected to a second inlet pipe (17). The threaded relief valve (28) is connected to a second check valve (20) via a pipe.

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