Horse head device of automatic unloading pumping unit

Abstract

The utility model relates to the technical field of pumping unit horseheads, in particular to an automatic pumping unit horsehead unloading device which comprises a horsehead body, a driving mechanism, a weight box, a hoisting assembly and a connecting rope, and a rope winding drum and the driving mechanism capable of driving the rope winding drum to rotate are arranged on the right side of the upper portion of the horsehead. The lifting device is reasonable and compact in structure, the driving mechanism is arranged to drive the rope winding drum to rotate, when the rope winding drum rotates, the lifting assembly moves up and down through the connecting rope, when the pumping unit is maintained, a weight box at any height can be lowered to the ground, and after maintenance is finished, the weight box on the ground can be lifted to the set height. The horsehead body can be installed on a walking beam of the pumping unit, so that the labor intensity of workers is reduced, after the horsehead body and the walking beam of the pumping unit are installed, a weight box on the ground is lifted to the set height through the driving mechanism, and therefore the working intensity of the workers for lifting the weight box is avoided; the height position of the oil pumping unit can be adjusted through the driving mechanism according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumping unit heads and particularly relates to an automatic unloading oil pumping unit head device. Background Art

[0002] The oil pumping unit is an important lifting equipment in oil extraction equipment. There are many types of oil pumping units. Common beam pumping units are roughly divided into conventional beam pumping units, out-of-phase beam pumping units, double donkey head beam pumping units, etc.

[0003] The double-head walking beam pumping unit is composed of many parts, the main parts of which are: base, motor, control box, reducer, crank, crank pin assembly, connecting rod, crossbeam, tail shaft assembly, walking beam, central bearing seat, bracket, working head, balancing head, counterweight box, wire rope, rope hanger, etc. In the double-head pumping unit, the balancing head is used to compensate for the load difference at the working head end. During the operation of the pumping unit, the balancing head and the working head are relatively balanced to reduce the power consumption of the motor and increase the active power.

[0004] During minor repairs, the pumping unit is shut down after the balancing head is at the bottom dead center, and then the counterweight box is removed. The pumping unit is operated again to bring the working head to the bottom dead center, the pumping unit is braked, the bare rod is fixed, and the bare rod and the rope hanger are separated. Then the operator needs to climb onto a working platform 3 to 6 meters high and pull out the balancing head pin. At this time, the balancing head lacks a positioning pin and will swing continuously. This kind of yielding operation poses a safety hazard and personnel must work at height.

[0005] The Chinese patent document with the announcement number CN2594460Y discloses a balanced counterweight device for an oil pumping unit, which is mainly composed of a counterweight box body, a movable counterweight block, a suspension rod, a wire rope, and a pin shaft. The balanced counterweight device for an oil pumping unit adopts a height-adjustable suspension rod, which adopts a graded adjustment mechanism. The suspension rod can be extended and retracted, and the same holes are distributed at different heights. The suspension rod is connected to the counterweight box body through a pin shaft, and the wire rope connects the counterweight box body and the oil pumping unit. The height-adjustable suspension rod adopts a spiral stepless adjustment mechanism. The balanced counterweight device for an oil pumping unit adopts drilling holes on the suspension rod and inserting pins or spiral stepless adjustment to achieve the height adjustment of the suspension rod, so that the minimum height of the utility model remains unchanged under different stroke conditions, and workers can easily perform balance adjustment. Moreover, the minimum height of the counterweight from the ground remains unchanged at the lowest position, which helps to stabilize the center of the counterweight and make the operation of the oil pumping unit smooth. However, the adjustment speed of the balancing counterweight device of the oil pump is slow. When the weight of the counterweight box is heavy, it is difficult to rotate the boom. Moreover, the boom has the same holes at different heights, making it impossible to achieve stepless adjustment of the height of the counterweight box body.

[0006] A Chinese patent document with publication number CN112324394A discloses a direct-drive oil pumping unit, which includes a supporting column, a transmission assembly is provided on the supporting column, the transmission assembly includes a driving motor, a first guide wheel and a second guide wheel, a first steel wire rope and a second steel wire rope are wound around the driving motor, the first steel wire rope is connected to the first guide wheel, a first pulley group is provided below the first guide wheel, the first pulley group includes a first movable pulley and a first fixed pulley, the first steel wire rope passes through the first movable pulley and the first fixed pulley in sequence, a counterweight is installed below the first movable pulley, the second steel wire rope is connected to the second guide wheel, a second pulley assembly is provided below the second guide wheel, the second pulley assembly includes a second fixed pulley and a second movable pulley, the second fixed pulley is fixed on the ground, the second movable pulley is hinged to one end of a walking beam, a donkey head is provided at the other end of the walking beam, a sucker rod is installed on the donkey head, and the walking beam is hinged to a lifting bracket. Although the counterweight can be driven to move up and down by the forward and reverse rotation of the driving motor, the height of the counterweight cannot be adjusted, and when the counterweight moves up and down, the other end of the pumping unit walking beam will also move, which is inconvenient for maintenance and adjustment of the pumping unit.

[0007] Currently, most well sites have double-head pumps, with a counterweight connected to one side of the head. Whether it is maintenance work on the pump or installation of a pump at a new wellhead, the disassembly and assembly of the counterweight sometimes requires the use of lifting machinery and hoisting equipment, which is time-consuming and labor-intensive, and there are also greater safety risks when working at high altitudes. Summary of the invention

[0008] The utility model provides an automatic unloading oil pumping unit balance head device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of time-consuming and labor-intensive disassembly and weighting of the existing oil pumping unit balance head and high safety risks.

[0009] The technical scheme of the utility model is realized through the following measures: an automatic unloading oil pumping unit donkey head device, comprising a donkey head body, a driving mechanism, a counterweight box, a lifting assembly and a connecting rope. A rope drum and a driving mechanism capable of driving the rope drum to rotate are arranged on the right side of the upper part of the donkey head body. A rope groove opening outward is arranged on the outer side of the left part of the donkey head body, and the bottom wall of the rope groove is in an arc shape opening to the right. An auxiliary pulley is installed on the inner side of the upper part of the rope groove, and a first guide pulley and a second guide pulley are rotatably installed on the upper side of the donkey head body corresponding to the position above the auxiliary pulley. A counterweight box is provided under the donkey head body, and a lifting assembly is hingedly installed on the upper side of the counterweight box, and a first lifting pulley and a second lifting pulley are arranged at intervals in the lifting assembly. The first end of the connecting rope is fixedly connected to the outer side of the front of the rope drum after passing around the outer side of the lower part of the first lifting pulley and the outer side of the upper part of the first guide pulley in sequence, and the second end of the connecting rope is fixedly connected to the outer side of the rear of the rope drum after passing around the outer side of the upper part of the auxiliary pulley, the outer side of the lower part of the second lifting pulley and the outer side of the upper part of the second guide pulley in sequence.

[0010] The following are further optimizations and / or improvements to the above utility model technical solution:

[0011] The above-mentioned driving mechanism may include a fixed seat and a driving motor. The fixed seat is fixedly installed on the upper right side of the donkey head body, the driving motor is fixedly installed on the upper left side of the fixed seat, and a rotating shaft is rotatably installed on the upper right side of the fixed seat. The rear end of the rotating shaft is transmission-connected with the rear end of the output shaft of the driving motor, and the rope drum is fixedly installed on the outside of the rotating shaft.

[0012] A mounting groove opening to the right may be provided on the upper right side of the donkey head body at the position below the above-mentioned corresponding fixed seat, and a first mounting hole and a second mounting hole which are connected front to back are provided at intervals on the upper and lower sides on the front side of the right side of the donkey head body corresponding to the position of the mounting groove, and a connecting pin with a hollow structure is passed through the second mounting hole, and a connecting thread is provided on the inner side of the front of the connecting pin, and a guide groove opening outward is provided axially on the outer side of the connecting pin, and a yield sleeve is fixedly installed on the front side of the right side of the donkey head body corresponding to the position of the second mounting hole, and a yield screw rod with a rear outer side screwed to the inner side of the front of the connecting pin is installed inside the yield sleeve, and a guide slider slidably installed in the guide groove is fixedly installed on the inner side of the rear of the yield sleeve, and a yield reduction motor is fixedly installed on the lower side of the front of the yield sleeve, and the upper end of the output shaft of the yield reduction motor is drivingly connected to the front end of the yield screw rod.

[0013] The above-mentioned lifting assembly may include a lifting frame, a lifting beam, a lifting rod and a locking nut. The first lifting pulley and the second lifting pulley are rotatably installed on the inner side of the upper part of the lifting frame at a front-to-rear interval. The lifting beam is rotatably installed on the inner side of the lower part of the lifting frame. A connecting hole that passes through the upper and lower parts is provided in the middle of the lifting beam. The lifting rod is passed through the connecting hole. A locking nut is fixedly installed on the outer side of the lifting rod corresponding to the upper side of the lifting beam. A mounting seat is fixedly installed in the center of the upper side of the counterweight box, and the lower part of the lifting rod is hingedly installed with the mounting seat.

[0014] A bearing can be installed on the outside of the suspension rod between the lower end of the corresponding locking nut and the upper end of the lifting beam. A connecting pipe is threadedly connected to the outer side of the lower end of the suspension rod, and the lower part of the connecting pipe is hingedly installed with the mounting seat.

[0015] A positioning seat can be fixedly installed on the inner side of the upper part of the rope groove, and a hanging plate is hingedly installed on the left part of the positioning seat. The hanging plate is in a U-shape with an opening downward, and a fixing pin is fixedly installed on the inner side of the upper part of the hanging plate. The auxiliary pulley is rotatably installed on the outside of the fixing pin, and an anti-dropping pin is fixedly installed on the lower part of the hanging plate corresponding to the position below the fixing pin.

[0016] The utility model has a reasonable and compact structure, and a driving mechanism is set to drive the rope drum to rotate. When the rope drum rotates, the lifting assembly is moved up and down through the connecting rope, thereby realizing the rising and falling of the counterweight box. In this way, when repairing the oil pump, the counterweight box at any height can be lowered to the ground. After the repair is completed, the counterweight box on the ground can also be lifted to a set height, thereby reducing the labor intensity of the staff. The donkey head body and the walking beam of the oil pump can also be installed, and then the counterweight box on the ground can be lifted to the set height through the driving mechanism, thereby avoiding the work intensity of the staff to lift the counterweight box. When the working stroke of the oil pump needs to be adjusted, the height position of the oil pump can also be adjusted through the driving mechanism according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of embodiments one to six of the present invention.

[0018] Attached Figure 2 It is a schematic diagram of the right side cross-sectional structure of the connecting pin in Embodiments 3 to 6 of the present utility model.

[0019] Attached Figure 3 It is a schematic diagram of the front cross-sectional structure of the connecting pin in Embodiments 3 to 6 of the present utility model.

[0020] Attached Figure 4 It is a schematic diagram of the left side cross-sectional structure of the lifting assembly in Embodiments 1 to 6 of the present utility model.

[0021] Attached Figure 5 This is a schematic diagram of the main structure of the hanging plate in the sixth embodiment of the utility model.

[0022] Attached Figure 6 It is a schematic diagram of the three-dimensional structure of the donkey head body when using embodiments 1 to 6 of the utility model.

[0023] The codes in the accompanying drawings are: 1 is the donkey head body, 2 is the counterweight box, 3 is the connecting rope, 4 is the rope groove, 5 is the auxiliary pulley, 6 is the first guide pulley, 7 is the second guide pulley, 8 is the first lifting pulley, 9 is the second lifting pulley, 10 is the rope drum, 11 is the fixed seat, 12 is the drive motor, 13 is the rotating shaft, 14 is the mounting groove, 15 is the first mounting hole, 16 is the connecting pin, 17 is the give way sleeve, 18 is the give way screw rod, 19 is the guide slider, 20 is the give way reduction motor, 21 is the lifting frame, 22 is the lifting beam, 23 is the suspension rod, 24 is the locking nut, 25 is the mounting seat, 26 is the bearing, 27 is the connecting pipe, 28 is the positioning seat, 29 is the hanging plate, 30 is the fixing pin, 31 is the anti-drop pin, and 32 is the walking beam of the oil pump. DETAILED DESCRIPTION

[0024] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0025] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0026] The present invention is further described below in conjunction with the embodiments and drawings:

[0027] Embodiment 1: As shown in the attached Figure 1 , 4 6, the automatic unloading pumping unit donkey head device comprises a donkey head body 1, a driving mechanism, a counterweight box 2, a hoisting assembly and a connecting rope 3. A rope drum 10 and a driving mechanism capable of driving the rope drum 10 to rotate are provided on the upper right side of the donkey head body 1. A rope groove 4 opening outward is provided on the outer side of the left part of the donkey head body 1. The bottom wall of the rope groove 4 is in an arc shape opening to the right. An auxiliary pulley 5 is installed on the inner side of the upper part of the rope groove 4. A first guide pulley 6 and a second guide pulley are installed on the upper side of the donkey head body 1 corresponding to the position above the auxiliary pulley 5. Toward pulley 7, a counterweight box 2 is provided under the donkey head body 1, and a lifting assembly is hingedly installed on the upper side of the counterweight box 2. The first lifting pulley 8 and the second lifting pulley 9 are arranged in the lifting assembly. The first end of the connecting rope 3 is passed around the lower outer side of the first lifting pulley 8, the upper outer side of the first guide pulley 6 in sequence, and then is fixedly connected to the front outer side of the rope drum 10. The second end of the connecting rope 3 is passed around the upper outer side of the auxiliary pulley 5, the lower outer side of the second lifting pulley 9 and the upper outer side of the second guide pulley 7 in sequence, and then is fixedly connected to the rear outer side of the rope drum 10.

[0028] According to the requirements, the counterweight box 2 and the donkey head body 1 are both existing known technologies. There are multiple installation compartments for installing counterweights in the counterweight box 2, and the connecting rope 3 is an existing known wire rope. During use, the driving mechanism is set to drive the rope drum 10 to rotate. When the rope drum 10 rotates, the hoisting assembly is moved up and down through the connecting rope 3, so that the counterweight box 2 can be raised and lowered. In this way, when repairing the oil pump, the counterweight box 2 of any height can be lowered to the ground to realize automatic unloading. After the maintenance is completed, the counterweight box 2 on the ground can also be lifted to a set height, thereby reducing the labor intensity of the staff. The donkey head body 1 can also be installed with the walking beam of the oil pump, and then the counterweight box 2 on the ground can be lifted to a set height through the driving mechanism, thereby avoiding the work intensity of the staff lifting the counterweight box 2. When it is necessary to adjust the working stroke of the oil pump, the height position of the oil pump can also be adjusted by the driving mechanism as needed.

[0029] According to actual needs, the above automatic unloading pumping unit donkey head device can be further optimized and / or improved:

[0030] Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 , 6 As shown, the driving mechanism includes a fixed seat 11 and a driving motor 12. The fixed seat 11 is fixedly installed on the upper right side of the donkey head body 1, the driving motor 12 is fixedly installed on the upper left side of the fixed seat 11, and a rotating shaft 13 is rotatably installed on the upper right side of the fixed seat 11. The rear end of the rotating shaft 13 is transmission-connected with the rear end of the output shaft of the driving motor 12, and the rope drum 10 is fixedly installed on the outside of the rotating shaft 13.

[0031] According to the requirements, the drive motor 12 is a known worm gear reduction motor. In order to improve safety, a known brake, such as an electromagnetic brake, can be set on the outside of the rotating shaft 13 in front of the rope drum 10. During use, the rope drum 10 is driven to rotate by the drive motor 12, so as to achieve the rise and fall of the hoisting assembly. In this way, when the pumping unit is repaired at any position of the walking beam 32 of the pumping unit, the counterweight box 2 can be safely lowered to the ground by the drive motor 12 to achieve the unloading of the counterweight box 2. The counterweight box 2 placed on the ground can also be quickly lifted to any height, making the disassembly and assembly of the counterweight box 2 more labor-saving and safer, and improving the maintenance efficiency.

[0032] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in , 3 and 6, a mounting groove 14 opening to the right is provided on the upper right side of the donkey head body 1 corresponding to the position below the fixed seat 11, and a first mounting hole and a second mounting hole passing through front and back are provided at intervals from top to bottom on the right front side of the donkey head body 1 corresponding to the position of the mounting groove 14, a connecting pin 16 with a hollow structure is passed through the second mounting hole, a connecting thread is provided on the inner side of the front of the connecting pin 16, and a guide groove opening outward is provided on the outer side of the connecting pin 16 along the axial direction, a yield sleeve 17 is fixedly installed on the front side of the right side of the donkey head body 1 corresponding to the position of the second mounting hole, a yield screw rod 18 whose rear outer side is screwed to the inner side of the front of the connecting pin 16, a guide slider 19 slidably installed in the guide groove is fixedly installed on the inner side of the rear of the yield sleeve 17, a yield reduction motor 20 is fixedly installed on the lower side of the front of the yield sleeve 17, and the upper end of the output shaft of the yield reduction motor 20 is drivingly connected with the front end of the yield screw rod 18.

[0033] According to the needs, a driven bevel gear is fixedly installed on the outer front part of the yielding screw rod 18, and an active bevel gear is fixedly installed on the upper end of the output shaft of the yielding reduction motor 20. The active bevel gear and the driven bevel gear are meshed with each other, thereby realizing the transmission connection between the upper end of the output shaft of the yielding reduction motor 20 and the front end of the yielding screw rod 18. The inner side of the lower part of the yielding sleeve 17 and the outer side of the lower part of the connecting pin 16 are provided with guide grooves with openings facing each other. The lower part of the guide slider 19 is fixedly installed in the guide groove of the yielding sleeve 17, and the upper part of the guide slider 19 is slidably installed in the guide groove of the connecting pin 16. The yielding reduction motor 20 is an existing well-known worm gear reduction motor. During use, after the yielding reduction motor 20 starts working, the outer rear end of the yielding screw rod 18 rotates in the connecting screw hole, and the connecting pin 16 moves forward or backward under the constraint of the guide slider 19, so as to facilitate the separation and fixation of the donkey head body 1 and the oil pumping unit walking beam 32, and realize the disassembly and assembly between the donkey head body 1 and the oil pumping unit walking beam 32. During minor repairs, the yielding reduction motor 20 is used to install or separate the donkey head body 1 and the oil pumping unit walking beam 32, avoiding the need for operators to climb up to work, thereby reducing safety risks, reducing the labor intensity of personnel, and shortening maintenance time.

[0034] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 4 As shown in , 6, the lifting assembly includes a lifting frame 21, a lifting beam 22, a hanging rod 23 and a locking nut 24. The first lifting pulley 8 and the second lifting pulley 9 are rotatably installed on the inner side of the upper part of the lifting frame 21 at an interval in front and back. The lifting beam 22 is rotatably installed on the inner side of the lower part of the lifting frame 21. A connecting hole that passes through the upper and lower parts is provided in the middle part of the lifting beam 22. The hanging rod 23 is passed through the connecting hole. A locking nut 24 is fixedly installed on the outer side of the hanging rod 23 corresponding to the upper side position of the lifting beam 22. A mounting seat 25 is fixedly installed in the center of the upper side of the counterweight box 2, and the lower part of the hanging rod 23 is hingedly installed with the mounting seat 25.

[0035] According to the requirements, the cross section of the middle part of the hoisting beam 22 can be rectangular, and the cross sections of the front and rear ends of the hoisting beam 22 are both circular. The outer sides of the front and rear ends of the hoisting beam 22 are both provided with annular clamping grooves, and the existing well-known clamping springs are installed in the clamping grooves to prevent the hoisting beam 22 from being separated from the hoisting frame 21 after moving forward and backward. During use, by providing a locking nut 24, it is convenient to disassemble and assemble the suspension rod 23 and the hoisting beam 22. The suspension rod 23 is inserted into the connecting hole. In this way, when the counterweight box 2 is in use, if it rotates in strong winds, the counterweight box 2 can rotate relative to the hoisting beam 22, so as to avoid driving the hoisting frame 21 to rotate so that the connecting rope 3 is entangled and finally separated from the rope groove 4 to cause a malfunction, which can improve stability.

[0036] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 4As shown, a bearing 26 is installed on the outer side of the suspension rod 23 between the lower end of the locking nut 24 and the upper end of the lifting beam 22, and a connecting pipe 27 is threadedly connected to the outer side of the lower end of the suspension rod 23, and the lower part of the connecting pipe 27 is hingedly installed with the mounting seat 25.

[0037] According to the requirements, the bearing 26 is a known thrust bearing. In this embodiment, the bearing 26 is installed on the inner side of the lower part of the locking nut 24, and the lower part of the connecting pipe 27 is hinged and installed with the mounting seat 25 through the known pins. During use, the upper end of the connecting pipe 27 is screwed together with the lower end of the suspension rod 23. In this way, after the counterweight box 2 is in place, the lower end of the connecting pipe 27 is first hinged and installed with the mounting seat 25 on the upper side of the counterweight box 2, and then the upper end of the connecting pipe 27 is screwed together with the lower end of the suspension rod 23. In this way, the problem of difficulty in installing the counterweight box 2 with the suspension rod 23 after the position of the counterweight box 2 is not corrected can be avoided, and the installation difficulty of the counterweight box 2 can be reduced, making the installation of the counterweight box 2 more labor-saving. In windy weather, the counterweight box 2 is easier to rotate relative to the hoisting beam 22, avoiding the entanglement of the connecting rope 3.

[0038] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 , 5 As shown in , 6, a positioning seat 28 is fixedly installed on the inner side of the upper part of the rope groove 4, and a hanging plate 29 is hingedly installed on the left part of the positioning seat 28. The hanging plate 29 is in a U-shape with an opening downward. A fixing pin 30 is fixedly installed on the inner side of the upper part of the hanging plate 29, and the auxiliary pulley 5 is rotatably installed on the outer side of the fixing pin 30. An anti-dropping pin 31 is fixedly installed on the lower part of the hanging plate 29 corresponding to the position below the fixing pin 30.

[0039] According to the needs, two fixing plates are fixedly installed at intervals on the front and rear sides of the upper inner side of the rope groove 4 corresponding to the position between the first guide pulley 6 and the second guide pulley 7, and a connecting rod with a rearward central axis is installed between the inner sides of the left parts of the two fixing plates. The inner side of the upper part of the hanging plate 29 is sleeved on the outer side of the connecting rod, and the anti-slip pin 31 can be an existing well-known connecting bolt. The setting of the anti-slip pin 31 can restrain the opening spacing between the lower parts of the hanging plates 29, thereby preventing the connecting pin 16 from being subjected to excessive force, causing the hanging plate 29 to deform and causing the lower opening to become larger, and finally causing the fixing pin 30 and the auxiliary pulley 5 to separate from the hanging plate 29, thereby improving the reliability during use.

[0040] The above technical features respectively constitute various embodiments of the present utility model, which have strong adaptability and optimal implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An automatic unloading pumping unit donkey head device, characterized in that The yoke is provided with a first end which is fixedly secured to the yoke when the yoke is in a position to move relative to the first wheel and to move relative to the first wheel when the yoke is in a position to move relative to the first wheel.

2. The automatic unloading pumping unit donkey head device according to claim 1 is characterized in that The driving mechanism includes a fixed seat and a driving motor. The fixed seat is fixedly installed on the upper right side of the donkey head body, the driving motor is fixedly installed on the upper left side of the fixed seat, and a rotating shaft is rotatably installed on the upper right side of the fixed seat. The rear end of the rotating shaft is transmission-connected with the rear end of the output shaft of the driving motor, and the rope drum is fixedly installed on the outside of the rotating shaft.

3. The automatic unloading pumping unit donkey head device according to claim 2 is characterized in that A mounting groove opening to the right is provided on the upper right side of the donkey head body corresponding to the position below the fixed seat, and a first mounting hole and a second mounting hole are provided at intervals from top to bottom on the right front side of the donkey head body corresponding to the position of the mounting groove, and a connecting pin with a hollow structure is passed through the second mounting hole, and a connecting thread is provided on the inner side of the front of the connecting pin, and a guide groove opening outward is provided axially on the outer side of the connecting pin, and a yield sleeve is fixedly installed on the front side of the right side of the donkey head body corresponding to the position of the second mounting hole, and a yield screw rod with a rear outer side screwed to the inner side of the front of the connecting pin is installed inside the yield sleeve, and a guide slider slidably installed in the guide groove is fixedly installed on the inner side of the rear of the yield sleeve, and a yield reduction motor is fixedly installed on the lower side of the front of the yield sleeve, and the upper end of the output shaft of the yield reduction motor is drivingly connected to the front end of the yield screw rod.

4. The automatic unloading pumping unit donkey head device according to claim 1, 2 or 3, characterized in that The lifting assembly includes a lifting frame, a lifting beam, a lifting rod and a locking nut. The first lifting pulley and the second lifting pulley are rotatably installed on the inner side of the upper part of the lifting frame at a front-to-rear interval. The lifting beam is rotatably installed on the inner side of the lower part of the lifting frame. A connecting hole that passes through the upper and lower parts is provided in the middle of the lifting beam. The lifting rod is passed through the connecting hole. A locking nut is fixedly installed on the outer side of the lifting rod corresponding to the upper side of the lifting beam. A mounting seat is fixedly installed in the center of the upper side of the counterweight box, and the lower part of the lifting rod is hingedly installed with the mounting seat.

5. The automatic unloading pumping unit donkey head device according to claim 4 is characterized in that A bearing is installed on the outer side of the suspension rod at a position between the lower end of the locking nut and the upper end of the lifting beam, a connecting pipe is screwed on the outer side of the lower end of the suspension rod, and the lower part of the connecting pipe is hingedly installed with the mounting seat.

6. The automatic unloading pumping unit donkey head device according to claim 1, 2, 3 or 5, characterized in that A positioning seat is fixedly installed on the inner side of the upper part of the rope groove, and a hanging plate is hingedly installed on the left part of the positioning seat. The hanging plate is in a U-shape with an opening downward. A fixing pin is fixedly installed on the inner side of the upper part of the hanging plate, and the auxiliary pulley is rotatably installed on the outside of the fixing pin. An anti-drop pin is fixedly installed on the lower part of the hanging plate corresponding to the position below the fixing pin.

7. The automatic unloading pumping unit donkey head device according to claim 4 is characterized in that A positioning seat is fixedly installed on the inner side of the upper part of the rope groove, and a hanging plate is hingedly installed on the left part of the positioning seat. The hanging plate is in a U-shape with an opening downward. A fixing pin is fixedly installed on the inner side of the upper part of the hanging plate, and the auxiliary pulley is rotatably installed on the outside of the fixing pin. An anti-drop pin is fixedly installed on the lower part of the hanging plate corresponding to the position below the fixing pin.

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