Digital pumping unit

Abstract

The invention discloses a digital oil pumping unit, which relates to the technical field of oil pumping units and comprises an oil pumping unit master control assembly, a stroke time adjusting assembly and a dynamic adjusting assembly. The stroke time adjusting assembly comprises two sets of synchronous stroke guide rails, under the cooperation of the stroke time adjusting assembly, according to the lever principle, torque generated by a balance dynamic heavy block is increased, at the moment, in the operation process of the oil pumping unit, a high-strength connecting arm needs to overcome larger resistance during rotation, and under the condition that the output power of power components such as a stepping air cylinder is not changed, the output power of the high-strength connecting arm is not changed. The rotating speed of the high-strength connecting arm is relatively slowed down, and the sliding speed of the bearing sliding framework on the synchronous stroke guide rail is also reduced, so that the swinging amplitude of the walking beam is reduced, the stroke of the walking beam for driving the horse head is shortened, and the oil pumping strength is reduced under the working conditions that the oil pumping strength is required to be reduced, such as reduced oil output of an oil well and increased oil viscosity. Motor overload caused by overlarge stroke can be avoided, and abrasion of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, in particular to a digital oil pumping unit. Background Art

[0002] The existing beam pumping units mainly include: conventional beam pumping units, front beam pumping units, offset beam pumping units and special-shaped beam pumping units. At present, beam pumping units generally include donkey heads, beam pumping units, brackets, connecting rods, bases, cranks, balancing devices, reducers, brakes, motors and suspension ropes. The brackets, reducers, brakes, motors and control cabinets are fixedly installed on the base. The beam pumping units are hinged on the brackets, the cranks are fixedly installed on the output shaft of the reducer, and one end of the connecting rod is hinged on the cranks. The other end of the connecting rod is hinged on the rocker, thus forming a four-bar linkage, with the donkey head installed at the front end of the rocker and the rope hanger installed on the donkey head; the balancing device is installed on the crank, or / and, the balancing device is installed on the rocker, and the balance is adjusted by manually adding or subtracting the mass of the counterweight to change the balancing torque; or / and, the balance is adjusted by manually moving the position of the counterweight to change the balancing torque; however, with the continuous deepening of my country's digital oilfield construction, the requirements for unmanned well site operation and automatic control of pumping units are constantly increasing.

[0003] At present, in the use of oil pumps, most oil pumps are set with parameters for general working conditions, lacking a flexible adjustment mechanism for special working conditions. As a result, in high-viscosity oil wells, the oil pumps cannot automatically adjust parameters such as stroke and stroke frequency to adapt to high-viscosity oil, resulting in reduced pumping efficiency and prone to pump jams. In deep well mining, due to the elastic deformation and increased vibration of the sucker rod, the structural design and control strategy of the existing oil pumps are difficult to effectively cope with, resulting in unstable operation of the oil pumps and increased failure rates. At the same time, most oil pumps adopt a constant speed operation mode, which makes it impossible to flexibly adapt when the oil output of the oil well changes, resulting in the motor still consuming a large amount of electricity at low load, causing energy waste. Therefore, it is necessary to propose a digital oil pump. Summary of the invention

[0004] The purpose of the present invention is to provide a digital oil pump to solve the problem proposed in the above-mentioned background technology that during the use of the oil pump, most of the oil pumps are mostly set for general working conditions, and lack a flexible adjustment mechanism for special working conditions. As a result, in high-viscosity oil wells, the oil pump cannot automatically adjust parameters such as stroke and stroke frequency to adapt to high-viscosity oil, resulting in reduced pumping efficiency and easy pump sticking. In deep well mining, due to the elastic deformation and increased vibration of the sucker rod, the structural design and control strategy of the existing oil pump are difficult to effectively cope with, resulting in unstable operation of the oil pump and increased failure rate. At the same time, most of the oil pumps adopt a constant speed operation mode, which makes it impossible to flexibly adapt when the oil output of the oil well changes, resulting in the motor still consuming a large amount of electricity at low load, causing energy waste.

[0005] To achieve the above object, the present invention provides the following technical solutions: A digital oil pumping unit, comprising an oil pumping unit master control component, a stroke adjustment component and a dynamic adjustment component; The stroke adjustment component includes two groups of synchronous stroke guide rails, the side ends of the two groups of synchronous stroke guide rails are slidably connected with a load-bearing sliding structure, the side ends of the load-bearing sliding structure are rotatably connected with a high-strength connecting arm, the side ends of the high-strength connecting arm are fastened with a lifting drive arm, the side ends of the lifting drive arm are rotatably connected with a synchronous connecting rod, the bottom end of the synchronous connecting rod is installed with a stepping cylinder, the side ends of the high-strength connecting arm are fastened with a balancing detection plate, and a balancing dynamic weight is installed inside the balancing detection plate, which is used to dynamically adjust the balancing dynamic weights on both sides, so that the stroke frequency and stroke intensity can be dynamically adjusted according to the actual working conditions of the oil well under the real-time feedback of the built-in flow sensor and the motor speed sensor; The dynamic adjustment component includes a push adjustment cylinder and a synchronous sliding track. The internal sliding connection of the synchronous sliding track is provided with an automatic locking limit structure, which is used to dynamically adjust the increase or reduction of the stroke distance according to the operating conditions of the crank structure, so as to reduce the damage to the pumping unit caused by the sudden increase in the load of the pumping unit when the viscosity of the oil suddenly increases.

[0006] Preferably, the side end of the high-strength connecting arm is fastened with a pressure rod frame, and the pressure rod frame is used to drive the balance detection plate to fasten the balance dynamic weight block, and the top and bottom of the pressure rod frame are respectively installed with a liquid metal injection cavity pump and a liquid metal output cavity pump.

[0007] Preferably, the side end of the liquid metal injection cavity pump is connected with a flow injection valve tube, the side end of the flow injection valve tube passes through the balance detection plate and the top end of the balance dynamic weight to form a connection, the side end of the liquid metal output cavity pump is connected with an output valve tube, the side end of the output valve tube is connected through a metering sensor and the bottom end of the balance dynamic weight to form a connection, and the side ends of the liquid metal injection cavity pump and the liquid metal output cavity pump are connected with a circulation guide valve tube.

[0008] Preferably, the oil pumping unit master control assembly includes a base frame, the top of the base frame is fastened with a bracket, the top of the bracket is installed with a walking beam, the bottom end of the side of the walking beam is rotatably connected to a crank structure, the bottom end of the crank structure is rotatably connected to a travel connecting piece, the side end of the travel connecting piece is fastened to the side end of the push-adjusting cylinder, and the side end of the travel connecting piece is slidably connected to a handle plate frame.

[0009] Preferably, a variable frequency output gear structure is connected to the side end of the handle plate frame, a pulley is connected to the side end of the pulley, a variable frequency controlled energy-saving motor is connected to the side end of the pulley, and a signal processing control structure is fastened to the bottom of the variable frequency output gear structure.

[0010] Preferably, a donkey head is installed on the side end of the walking beam, a rope hanger is installed on the side end of the donkey head, a ball valve control structure is installed on the bottom end of the rope hanger, the bottom of the ball valve control structure is connected to an adaptive flow regulating device, and an oil purification and separation structure is installed on the bottom of the adaptive flow regulating device.

[0011] Preferably, the signal processing control structure includes a reducer, a brake, a control processor, a data collector and a communication processor. The data collector is used to collect data information from the built-in flow sensor and the motor speed sensor, and feed it back to the control processor and the communication processor. The data is uploaded to the local intelligent terminal of the oil pump, and then transmitted to the remote server through the Internet of Things communication network. On the remote server, these data will be analyzed and judged together with the data uploaded by other oil pumps to achieve data sharing and collaborative control. When a special operating condition or fault occurs in an oil well, the control processor automatically obtains the optimal control strategy from other oil pumps with similar operating conditions and good operation, and adjusts its own operation.

[0012] Preferably, the two groups of synchronous travel guide rails are installed at the left and right ends of the walking beam, and the two groups of synchronous travel guide rails are signal-connected to the control processor.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, with the cooperation of the stroke adjustment component, when the flow sensor detects a sudden increase in the oil output of the oil well and the speed of the variable frequency controlled energy-saving motor is relatively stable, the control processor determines that the stroke frequency needs to be appropriately increased to improve the oil pumping efficiency. When the oil output decreases and the load of the variable frequency controlled energy-saving motor increases, it may be necessary to reduce the stroke frequency and intensity to avoid motor overload. When the control processor issues an instruction to adjust the stroke frequency, the stepping cylinder starts to work, and the stepping cylinder pushes the lifting drive arm through the synchronous connecting rod, and the lifting drive arm drives the high-strength connecting arm to rotate around its rotation point. The rotation of the high-strength connecting arm causes the load-bearing sliding frame to slide on the synchronous stroke guide rail, thereby changing the stroke frequency of the oil pump. That is, when the stroke frequency needs to be increased, the stepping cylinder pushes the synchronous connecting rod to make the high-strength connecting arm rotate around its rotation point. The angle of the strength connecting arm is adjusted to increase the frequency and intensity of the strokes. The stroke intensity is dynamically adjusted through the balanced dynamic weight, so that when the position of the two ends of the walking beam changes, the control processor calculates the weight of the balanced dynamic weight that needs to be adjusted according to the oil well operating conditions and the motor load conditions, and then controls the liquid metal injection cavity pump and the liquid metal output cavity pump to work. When the stroke intensity needs to be increased, the liquid metal injection cavity pump injects liquid metal into the balanced dynamic weight through the flow injection valve pipe to increase its weight. Conversely, the liquid metal output cavity pump extracts the liquid metal in the balanced dynamic weight through the output valve pipe to reduce its weight. In this process, the metering sensor monitors the flow of liquid metal in the output valve pipe in real time to ensure the accuracy of the amount of liquid metal extracted or injected, so as to accurately adjust the stroke intensity.

[0014] 2. In the present invention, by cooperating with the stroke adjustment component and based on the communication technology of the Internet of Things, when other pumping units are under the same oil viscosity and output conditions, by increasing the weight of the balancing dynamic weight block and appropriately reducing the stroke frequency, better energy utilization efficiency and oil pumping stability are achieved. The control processor of the current pumping unit will control the liquid metal injection cavity pump to increase the weight of the balancing dynamic weight block according to this strategy, and adjust the stepping cylinder to reduce the stroke frequency, or dynamically adjust the relative position of the balancing dynamic weight block, so that the travel of the donkey head driven by the walking beam changes accordingly. According to the principle of leverage, The torque generated by the balanced dynamic weight increases. At this time, during the operation of the oil pump, the high-strength connecting arm needs to overcome greater resistance when rotating. When the output power of power components such as the stepping cylinder remains unchanged, the rotation speed of the high-strength connecting arm will be relatively slowed down, and the sliding speed of the load-bearing sliding structure on the synchronous stroke guide rail will also decrease accordingly, which will cause the swing amplitude of the walking beam to decrease, and thus shorten the stroke of the donkey head driven by the walking beam. Under working conditions where the pumping intensity needs to be reduced, such as reduced oil output from the oil well and increased oil viscosity, it can avoid motor overload due to excessive stroke and reduce equipment wear.

[0015] 3. In the present invention, with the cooperation of the stroke adjustment component, when the balancing dynamic weight moves toward the direction close to the rotation center of the high-strength connecting arm, that is, when the position of the other side of the rocker is adjusted, the weight can be reduced and the center of gravity position can be changed by extracting liquid metal, so that the torque generated by the balancing dynamic weight is reduced, and the resistance encountered by the high-strength connecting arm during rotation becomes smaller. Under the same power output, its rotation speed will be relatively accelerated, so that the sliding speed of the load-bearing sliding structure on the synchronous stroke guide rail is increased, and the swing amplitude of the rocker is increased, so that the stroke of the donkey head driven by the rocker is longer, which is convenient for improving the pumping efficiency when the oil output of the oil well increases and the oil viscosity is low, and making full use of the production capacity of the oil well, so that the whole can be automatically adjusted according to the actual working conditions of the oil well, thereby improving the pumping efficiency, avoiding energy waste and equipment failure caused by unreasonable stroke times, realizing intelligent cooperation between pumping units, and improving the operating efficiency and stability of the pumping units in the entire oil field.

[0016] 4. In the present invention, by cooperating with the stroke adjustment component, the push adjustment cylinder, the stroke connector, the automatic locking limit structure and the synchronous sliding track, the position of the automatic locking limit structure is changed, and the movement range of the crank structure is limited, so that the travel distance of the donkey head driven by the walking beam is reduced, and the load of the oil pump when working with high-viscosity oil is reduced. When the oil viscosity decreases or other working conditions change so that the stroke distance needs to be increased, the control processor controls the piston rod of the push adjustment cylinder to extend, and pushes the automatic locking limit structure to move away from the other side of the handle plate frame in the synchronous sliding track to reach a predetermined position. After that, the automatic locking limit structure will lock the stroke connector again, so that the movement range of the crank structure is increased, and then the travel distance of the donkey head driven by the walking beam is increased, thereby improving the oil pumping efficiency. Based on the Internet of Things communication technology, when other oil pumps are working under high viscosity oil conditions, the equipment load is effectively reduced and the continuity of oil pumping is ensured by appropriately reducing the stroke distance and reducing the stroke frequency. The current control processor of the oil pump will control the push adjustment cylinder to reduce the stroke distance according to this strategy, and cooperate with the stroke adjustment component to reduce the stroke frequency, thereby improving the oil pumping efficiency of the oil pump under different working conditions and reducing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the main view of the digital oil pumping unit of the present invention; Figure 2 It is a structural schematic diagram of a digital oil pumping unit in a side view of the present invention; Figure 3 In the digital oil pumping unit of the present invention Figure 1 A schematic diagram of the enlarged structure at point A; Figure 4 It is a schematic diagram of the installation position structure of the stroke adjustment component in the digital oil pumping unit of the present invention; Figure 5It is a structural schematic diagram of the stroke adjustment component in the digital oil pumping unit of the present invention; Figure 6 In the digital oil pumping unit of the present invention Figure 5 A schematic diagram of the enlarged structure at B; Figure 7 It is a partial structural schematic diagram of the stroke adjustment component in the digital oil pumping unit of the present invention; Figure 8 It is a schematic diagram of the partial structure of the stroke adjustment component in the digital oil pumping unit of the present invention.

[0018] In the figure: 1. Pumping unit master control assembly; 10. Base frame; 11. Frequency conversion control energy-saving motor; 12. Pulley; 13. Frequency conversion output gear structure; 14. Bracket; 15. Handle plate frame; 16. Stroke connector; 17. Crank structure; 18. Walking beam; 19. Donkey head; 101. Rope hanger; 102. Ball valve control structure; 103. Adaptive flow control device; 104. Oil purification and separation structure; 105. Signal processing control structure; 2. Stroke adjustment assembly; 21. Synchronous stroke guide ; 22. Load-bearing sliding structure; 23. High-strength connecting arm; 24. Pressure rod frame; 25. Balance detection plate; 26. Balance dynamic weight; 27. Stepping cylinder; 28. Synchronous connecting rod; 29. ​​Lifting drive arm; 290. Liquid metal output cavity pump; 291. Liquid metal injection cavity pump; 292. Circulation guide valve pipe; 293. Flow injection valve pipe; 294. Output valve pipe; 3. Dynamic adjustment component; 31. Synchronous sliding trajectory; 32. Automatic locking limit structure; 33. Push adjustment cylinder. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1: In the present invention, referring to Figure 1 - Figure 8 As shown: a digital oil pumping unit, comprising an oil pumping unit master control component 1, a stroke adjustment component 2 and a dynamic adjustment component 3; The stroke adjustment component 2 includes two groups of synchronous stroke guide rails 21, the side ends of the two groups of synchronous stroke guide rails 21 are slidingly connected to the load-bearing sliding structure 22, the side ends of the load-bearing sliding structure 22 are rotatably connected to the high-strength connecting arm 23, the side ends of the high-strength connecting arm 23 are fastened to the lifting drive arm 29, the side ends of the lifting drive arm 29 are rotatably connected to the synchronous connecting rod 28, the bottom end of the synchronous connecting rod 28 is installed with a stepping cylinder 27, the side ends of the high-strength connecting arm 23 are fastened to the balance detection plate 25, and the balance detection plate 25 is internally installed with a balancing dynamic weight 26, which is used to dynamically adjust the balancing dynamic weights 26 on both sides, so that the stroke frequency and stroke intensity can be dynamically adjusted according to the actual working conditions of the oil well under the real-time feedback of the built-in flow sensor and the motor speed sensor.

[0021] The side end of the high-strength connecting arm 23 is fastened with a pressure rod frame 24, which is used to drive the balance detection plate 25 to fasten the balance dynamic weight 26. The top and bottom of the pressure rod frame 24 are respectively installed with a liquid metal injection cavity pump 291 and a liquid metal output cavity pump 290.

[0022] The side end of the liquid metal injection cavity pump 291 is connected to a flow injection valve tube 293, and the side end of the flow injection valve tube 293 passes through the top of the balance detection plate 25 and the balance dynamic weight block 26 to form a connection. The side end of the liquid metal output cavity pump 290 is connected to an output valve tube 294, and the side end of the output valve tube 294 is connected through a metering sensor and the bottom end of the balance dynamic weight block 26. The side ends of the liquid metal injection cavity pump 291 and the liquid metal output cavity pump 290 are connected to a circulation guide valve tube 292.

[0023] In a specific solution, when the oil pump starts to run, the built-in flow sensor monitors the oil flow rate of the oil well in real time, and the motor speed sensor monitors the speed of the variable frequency controlled energy-saving motor 11. The generated data is quickly transmitted to the data collector in the signal processing control structure 105, and the data collector further transmits the data to the control processor. The control processor determines whether the current pumping frequency and intensity need to be adjusted based on the received flow and motor speed data, combined with the pre-set algorithm and the oil well operating model. When the flow sensor detects a sudden increase in the oil output of the oil well and the speed of the variable frequency controlled energy-saving motor 11 is relatively stable, the control processor determines that the stroke frequency needs to be appropriately increased to improve the pumping efficiency, and when the oil output decreases and the variable frequency controlled energy-saving motor 11 is relatively stable, the control processor determines that the stroke frequency needs to be appropriately increased to improve the pumping efficiency. If the load of the energy-saving motor 11 is increased, it may be necessary to reduce the frequency and intensity of the strokes to avoid motor overload. When the control processor issues an instruction to adjust the stroke frequency, the stepper cylinder 27 starts to work, and the stepper cylinder 27 pushes the lifting drive arm 29 through the synchronous connecting rod 28. The lifting drive arm 29 drives the high-strength connecting arm 23 to rotate around its rotation point. The rotation of the high-strength connecting arm 23 makes the load-bearing sliding structure 22 slide on the synchronous stroke guide rail 21, thereby changing the stroke frequency of the oil pump. That is, when the stroke frequency needs to be increased, the stepper cylinder 27 pushes the synchronous connecting rod 28 to adjust the angle of the high-strength connecting arm 23, thereby increasing the stroke frequency and intensity. The stroke intensity is dynamically adjusted by the balancing dynamic weight 26, so that the position at both ends of the walking beam 18 is adjusted. Under changing conditions, the control processor calculates the weight of the balancing dynamic weight 26 that needs to be adjusted according to the oil well operating conditions and the motor load conditions, and then controls the liquid metal injection cavity pump 291 and the liquid metal output cavity pump 290 to work. When the intensity of the stroke needs to be increased, the liquid metal injection cavity pump 291 injects the liquid metal into the balancing dynamic weight 26 through the flow injection valve pipe 293 to increase its weight. Conversely, the liquid metal output cavity pump 290 extracts the liquid metal in the balancing dynamic weight 26 through the output valve pipe 294 to reduce its weight. In this process, the metering sensor monitors the flow rate of the liquid metal in the output valve pipe 294 in real time to ensure that the amount of liquid metal extracted or injected is accurate, so as to accurately adjust the intensity of the stroke. Secondly, the communication technology based on the Internet of Things The communication processor in the signal processing control structure 105 of the oil pump uploads its own operating data to the remote server. When the remote server analyzes and finds that other oil pumps are in similar working conditions and are operating well, it will send the optimization control strategies of these oil pumps to the current oil pump. The control processor adjusts the working state of the stroke adjustment component 2 again according to the received strategy. That is, when other oil pumps are under the same oil viscosity and output, by increasing the weight of the balancing dynamic weight block 26 and appropriately reducing the stroke frequency, better energy utilization efficiency and oil pumping stability are achieved. The control processor of the current oil pump will control the liquid metal injection cavity pump 291 to increase the weight of the balancing dynamic weight block 26 and adjust the stepping cylinder 27 to reduce the stroke frequency according to the strategy.Or dynamically adjust the relative position of the balancing dynamic weight 26, so that the stroke of the donkey head 19 driven by the walking beam 18 changes accordingly. According to the lever principle, the torque generated by the balancing dynamic weight 26 increases. At this time, during the operation of the oil pump, the high-strength connecting arm 23 needs to overcome greater resistance when rotating. When the output power of power components such as the stepping cylinder 27 remains unchanged, the rotation speed of the high-strength connecting arm 23 will be relatively slowed down, and the sliding speed of the load-bearing sliding structure 22 on the synchronous stroke guide rail 21 will also decrease accordingly, which will cause the swing amplitude of the walking beam 18 to decrease, thereby shortening the stroke of the donkey head 19 driven by the walking beam 18. Under conditions where the oil output of the oil well decreases, the viscosity of the oil increases, and the pumping intensity needs to be reduced, it can avoid motor overload caused by excessive stroke and reduce equipment wear. When the balancing dynamic weight 26 rotates close to the high-strength connecting arm 23 The direction of the center, that is, when the position of the other side of the walking beam 18 is adjusted, the weight can be reduced by extracting liquid metal and changing the center of gravity position, so that the torque generated by the balancing dynamic weight 26 is reduced, and the resistance of the high-strength connecting arm 23 during rotation becomes smaller. Under the same power output, its rotation speed will be relatively faster, so that the sliding speed of the bearing sliding structure 22 on the synchronous stroke guide rail 21 increases, and the swing amplitude of the walking beam 18 increases, so that the walking beam 18 drives the donkey head 19 to travel longer, which is convenient for improving the pumping efficiency when the oil output of the oil well increases and the oil viscosity is low, and fully utilizing the production capacity of the oil well, so that the whole can be automatically adjusted according to the actual working conditions of the oil well, improving the pumping efficiency, avoiding energy waste and equipment failure caused by unreasonable stroke times, realizing intelligent cooperation between pumping units, and improving the operating efficiency and stability of the entire oil field pumping unit.

[0024] Embodiment 2: In the present invention, according to Figure 3 As shown, the dynamic adjustment component 3 includes a push adjustment cylinder 33 and a synchronous sliding track 31. The internal sliding connection of the synchronous sliding track 31 is provided with an automatic locking limit structure 32, which is used to dynamically adjust the increase or reduction of the stroke distance according to the operating conditions of the crank structure, so as to reduce the damage to the pumping unit caused by the sudden increase in the load of the pumping unit when the viscosity of the oil suddenly increases.

[0025] In a specific solution, during the above-mentioned operation of the oil pump, the operation status of the crank structure 17 is monitored in real time by the angle sensor and torque sensor installed on the surface, so that these sensors transmit the collected data to the data collector in the signal processing control structure 105, and the data collector then transmits the data to the control processor. The control processor determines whether it is necessary to adjust the stroke distance of the oil pump based on the received crank structure operation data, combined with pre-set parameter thresholds such as oil viscosity and motor load and related algorithm models, so that when the oil viscosity sensor detects a sudden increase in oil viscosity and the motor load monitoring data shows that the load has increased sharply, the control processor determines that it is necessary to reduce the stroke distance at this time. The distance is reduced to reduce the load of the oil pumping unit and avoid equipment damage. When the control processor issues an instruction to reduce the stroke distance, the adjusting cylinder 33 is pushed to start working, and the piston rod of the adjusting cylinder 33 is pushed back, driving the stroke connecting piece 16 and the automatic locking limit structure 32 connected thereto to slide toward the side of the handle plate frame 15 in the synchronous sliding trajectory 31. When the automatic locking limit structure 32 slides to a suitable position, the control processor sends a locking instruction, and the automatic locking limit structure 32 locks the stroke connecting piece 16 in this position to ensure the stability of the subsequent stroke. At this time, due to the change in the position of the automatic locking limit structure 32, the movement range of the crank structure 17 is limited, thereby reducing the stroke distance of the donkey head 19 driven by the walking beam 18, thereby reducing the pumping distance. The load of the oil machine when working with high-viscosity oil, and when the viscosity of the oil decreases or other working conditions change so that the stroke distance needs to be increased, the control processor controls the piston rod of the push-adjusting cylinder 33 to extend, and pushes the automatic locking limit structure 32 away from the other side of the handle plate frame 15 in the synchronous sliding trajectory 31. After reaching the predetermined position, the automatic locking limit structure 32 will lock the stroke connector 16 again, so that the movement range of the crank structure 17 is increased, and the travel distance of the donkey head 19 driven by the walking beam 18 is increased, thereby improving the oil pumping efficiency. Based on the Internet of Things communication technology, the communication processor in the signal processing control structure 105 of the oil pumping unit uploads its own operating data (including the working status data of the dynamic adjustment component 3) to the remote server. When the remote server analysis finds that other pumping units have achieved better operating results by adjusting the stroke distance under similar working conditions (such as the same oil viscosity range, similar geological conditions, etc.), these optimization strategies will be sent to the current pumping unit. The control processor will adjust the working state of the dynamic adjustment component 3 again according to the received strategy, so that when other pumping units are under high viscosity oil conditions, by appropriately reducing the stroke distance and reducing the stroke frequency, the equipment load is effectively reduced and the continuity of oil pumping is ensured. The control processor of the current pumping unit will control the push adjustment cylinder 33 to reduce the stroke distance according to the strategy, and cooperate with the stroke adjustment component 2 to reduce the stroke frequency, thereby improving the oil pumping efficiency of the pumping unit under different working conditions and reducing energy waste.

[0026] Embodiment 3: In the present invention, according to Figure 1 , Figure 2 and Figure 4 As shown, the main control assembly 1 of the oil pumping unit includes a base frame 10, the top of the base frame 10 is fastened with a bracket 14, the top of the bracket 14 is installed with a walking beam 18, the bottom end of the side of the walking beam 18 is rotatably connected to a crank structure 17, the bottom end of the crank structure 17 is rotatably connected to a travel connecting piece 16, the side end of the travel connecting piece 16 is fastened to the side end of the push adjustment cylinder 33, and the side end of the travel connecting piece 16 is slidably connected to a handle plate frame 15.

[0027] The side end of the handle frame 15 is connected to a variable frequency output gear structure 13, the side end of the variable frequency output gear structure 13 is connected to a pulley 12, the side end of the pulley 12 is connected to a variable frequency controlled energy-saving motor 11, and the bottom of the variable frequency output gear structure 13 is fastened with a signal processing control structure 105.

[0028] A donkey head 19 is installed at the side end of the walking beam 18, a rope hanger 101 is installed at the side end of the donkey head 19, a ball valve control structure 102 is installed at the bottom end of the rope hanger 101, the bottom of the ball valve control structure 102 is connected to an adaptive flow regulating device 103, and an oil purification and separation structure 104 is installed at the bottom of the adaptive flow regulating device 103.

[0029] The signal processing control structure 105 includes a reducer, a brake, a control processor, a data collector and a communication processor. The data collector is used to collect data information from the built-in flow sensor and the motor speed sensor, and feed it back to the control processor and the communication processor. The data is uploaded to the local intelligent terminal of the pumping unit, and then transmitted to the remote server through the Internet of Things communication network. On the remote server, these data will be analyzed and judged together with the data uploaded by other pumping units to achieve data sharing and collaborative control. When a special operating condition or fault occurs in an oil well, the control processor automatically obtains the optimal control strategy from other pumping units with similar operating conditions and good operation, and adjusts its own operation.

[0030] Two sets of synchronous travel guide rails 21 are installed at the left and right ends of the walking beam 18, and the two sets of synchronous travel guide rails 21 form a signal connection with the control processor.

[0031] In a specific solution, after the oil pump is started, the variable frequency controlled energy-saving motor 11 starts to run, and drives the crank structure 17 to rotate through the pulley 12 and the variable frequency output gear structure 13. The rotation of the crank structure 17 is connected to the push adjustment cylinder 33 through the stroke connector 16. At the same time, the above-mentioned sensor starts to collect data in real time, so that the data is transmitted to the data collector of the signal processing control structure 105. The data collector further feeds back the data to the control processor and the communication processor, and uploads it to the local intelligent terminal of the oil pump, and finally transmits it to the remote server through the Internet of Things communication network. The adaptive flow regulating device 103 automatically adjusts the flow area of ​​the internal flow channel according to the oil pressure and flow data transmitted by the ball valve control structure 102, so as to realize the precise control of the oil flow, so that when the oil output of the oil well changes, the adaptive flow regulating device 103 responds in time to ensure that the oil can pass smoothly. At the same time, the oil purification and separation structure 104 purifies and separates the oil passing through the adaptive flow regulating device 103 to remove impurities and moisture in the oil and improve the oil quality.

[0032] The wiring diagrams of the adaptive flow regulating device 103, oil purification and separation structure 104, angle sensor, torque sensor, flow sensor, communication processor and motor speed sensor in the present invention are common knowledge in the field, and their working principles are already known technologies. The models are selected according to actual use, so the control method and wiring layout of the adaptive flow regulating device 103, oil purification and separation structure 104, angle sensor, torque sensor, flow sensor, communication processor and motor speed sensor will no longer be explained in detail.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Digital oil pumping unit, including: The pumping unit master control component (1), the stroke adjustment component (2) and the dynamic adjustment component (3) are characterized by: The stroke adjustment component (2) comprises two groups of synchronous stroke guide rails (21), the side ends of the two groups of synchronous stroke guide rails (21) are slidably connected to a load-bearing sliding structure (22), the side ends of the load-bearing sliding structure (22) are rotatably connected to a high-strength connecting arm (23), the side ends of the high-strength connecting arm (23) are fastened to a lifting drive arm (29), the side ends of the lifting drive arm (29) are rotatably connected to a synchronous connecting rod (28), the bottom end of the synchronous connecting rod (28) is installed with a stepping cylinder (27), the side ends of the high-strength connecting arm (23) are fastened to a balance detection plate (25), and a balance dynamic weight (26) is installed inside the balance detection plate (25) for dynamically adjusting the balance dynamic weights (26) on both sides, so that the stroke frequency and stroke intensity can be dynamically adjusted according to the actual working conditions of the oil well under the real-time feedback of the built-in flow sensor and the motor speed sensor; The dynamic adjustment component (3) comprises a push adjustment cylinder (33) and a synchronous sliding track (31), wherein the synchronous sliding track (31) is internally slidably connected to an automatic locking limit structure (32) for dynamically adjusting the increase or decrease of the stroke distance according to the operating conditions of the crank structure, so as to reduce the damage to the pumping unit caused by a sudden increase in the load of the pumping unit when the viscosity of the oil suddenly increases.

2. The digital oil pumping unit according to claim 1, characterized in that: The side end of the high-strength connecting arm (23) is fastened to a pressure rod frame (24), and the pressure rod frame (24) is used to drive the balance detection plate (25) to fasten the balance dynamic weight (26). The top and bottom of the pressure rod frame (24) are respectively installed with a liquid metal injection cavity pump (291) and a liquid metal output cavity pump (290).

3. The digital oil pumping unit according to claim 2, characterized in that: The side end of the liquid metal injection cavity pump (291) is connected to a flow injection valve tube (293), and the side end of the flow injection valve tube (293) penetrates through the balance detection plate (25) and the top end of the balance dynamic weight (26) to form a connection. The side end of the liquid metal output cavity pump (290) is connected to an output valve tube (294), and the side end of the output valve tube (294) is connected through a metering sensor and the bottom end of the balance dynamic weight (26). The side ends of the liquid metal injection cavity pump (291) and the liquid metal output cavity pump (290) are connected to a circulation guide valve tube (292).

4. The digital oil pumping unit according to claim 1, characterized in that: The pumping unit master control assembly (1) comprises a base frame (10), the top of the base frame (10) is fastenedly connected to a bracket (14), the top of the bracket (14) is provided with a walking beam (18), the side bottom end of the walking beam (18) is rotatably connected to a crank structure (17), the bottom end of the crank structure (17) is rotatably connected to a travel connecting piece (16), the side end of the travel connecting piece (16) is fastenedly connected to the side end of a push regulating cylinder (33), and the side end of the travel connecting piece (16) is slidably connected to a handle plate frame (15).

5. The digital oil pumping unit according to claim 4 is characterized in that: The side end of the handle plate frame (15) is connected to a variable frequency output gear structure (13), the side end of the variable frequency output gear structure (13) is connected to a belt pulley (12), the side end of the belt pulley (12) is connected to a variable frequency control energy-saving motor (11), and the bottom of the variable frequency output gear structure (13) is fastened to a signal processing control structure (105).

6. The digital oil pumping unit according to claim 5, characterized in that: A donkey head (19) is mounted on the side end of the walking beam (18), a rope hanger (101) is mounted on the side end of the rope hanger (101), a ball valve control structure (102) is mounted on the bottom end of the rope hanger (101), the bottom of the ball valve control structure (102) is connected to an adaptive flow regulating device (103), and an oil purification and separation structure (104) is mounted on the bottom of the adaptive flow regulating device (103).

7. The digital oil pumping unit according to claim 5, characterized in that: The signal processing control structure (105) includes a reducer, a brake, a control processor, a data collector and a communication processor. The data collector is used to collect data information from a built-in flow sensor and a motor speed sensor, and feed it back to the control processor and the communication processor. The data is uploaded to a local intelligent terminal of the pumping unit, and then transmitted to a remote server through an Internet of Things communication network. On the remote server, these data will be analyzed and judged together with data uploaded by other pumping units to achieve data sharing and collaborative control. When a special working condition or failure occurs in a certain oil well, the control processor automatically obtains the optimal control strategy from other pumping units with similar working conditions and good operation, and adjusts its own operation.

8. The digital oil pumping unit according to claim 1, characterized in that: The two sets of synchronous travel guide rails (21) are installed at the left and right ends of the walking beam (18), and the two sets of synchronous travel guide rails (21) are signal-connected to the control processor.

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