Horse head receding device of oil pumping unit

Abstract

The utility model relates to the technical field of beam-pumping units, in particular to a horsehead receding device of a pumping unit. Comprising a horse head rotationally connected with one end of a walking beam, the horse head comprises two side plates fixedly connected, two lug plates are fixed between the two side plates and fixedly connected through a vertical rotating shaft, the rotating shaft is rotationally connected with one end of the walking beam, a square rod is arranged on the walking beam in a sliding mode, and a telescopic rod can drive the square rod to slide. A fixing rod is fixed to the lower end of the square rod, a push rod is fixed to the lower end of the fixing rod, a rack is fixed to the end, away from the fixing rod, of the push rod, and a gear ring is concentrically and fixedly arranged on the rotating shaft in a sleeving mode. The electric telescopic rod drives the square rod to slide, manual climbing operation is not needed, and potential safety hazards of climbing operation in a traditional device are thoroughly eliminated.

Description

Technical Field

[0001] This utility model relates to the technical field of walking beam pumping units, specifically to a donkey head clearance device for a pumping unit. Background Technology

[0002] The pumping unit operates normally 24 hours a day, and is only shut down for maintenance or repairs when there is a malfunction. During maintenance, the pumping unit's nozzle needs to be cleared of the wellhead by a certain distance.

[0003] Patent document CN201292823Y discloses a donkey head positioning device for a walking beam pumping unit, which includes a walking beam, a donkey head, a donkey head pin, a turbine, and a worm gear. The donkey head pin, which connects the walking beam and the donkey head, is located on the centerline of the walking beam. Both ends of the worm gear are installed in mounting holes on the walking beam. The worm gear is installed on the upper end of the donkey head pin and is fixedly connected to the donkey head. The donkey head positioning device for the walking beam pumping unit is installed on the lower flange of the walking beam. A support seat is fixedly installed on the lower flange of the walking beam near the donkey head. There are two parallel tie rod support frames on the support seat. The tie rod is installed in the through hole of the tie rod support frame. An axial spring is installed on the tie rod located between the two tie rod support frames. A bracket is fixedly installed on the lower flange of the walking beam near the support end of the walking beam. A handle is connected to the bracket through a pin. One end of a steel wire rope is fixedly connected to the tie rod, and the other end is fixedly connected to the handle. A positioning plate is fixedly connected to the lower end of the donkey head pin. The positioning plate has a positioning groove for the front end of the tie rod to be inserted. When performing well workover operations on this pumping unit, the pump head needs to move aside from the wellhead to facilitate the work. The process is as follows: First, pull the handle in the opposite direction of the pump head, which moves the pull rod via the wire rope, and the front end of the pull rod is pulled out of the positioning slot in the positioning plate. Then, rotate the worm gear, which drives the worm wheel and the pump head to rotate around the pump head pin. After the pump head has moved aside from the wellhead, release the handle. Under the action of the axial spring, the front end of the pull rod rests against the positioning plate to prevent the pump head from rotating. Therefore, it can be seen that when pulling the handle, the operator still needs to climb to a height to operate, which poses a safety risk. Utility Model Content

[0004] The main purpose of this utility model is to provide a pumping unit donkey head repositioning device that can automatically rotate and reposition the donkey head before well workover.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A donkey head repositioning device for an oil pumping unit includes a donkey head rotatably connected to one end of a walking beam. The donkey head includes two side plates, the ends of which are away from the walking beam are fixedly connected by an arc-shaped plate. Two ear plates, arranged vertically, are fixed between the two side plates and are fixedly connected by a vertical rotating shaft. The rotating shaft is rotatably connected to one end of the walking beam. A square rod is slidably mounted on the walking beam, the sliding direction of which is parallel to the length direction of the walking beam. The square rod slides along the length direction of the walking beam. A telescopic rod is fixed on the walking beam, which can drive the square rod to slide. A positioning block is fixed at the end of the square rod facing the donkey head. A positioning sleeve is fixedly mounted on the rotating shaft. The positioning block and the positioning sleeve are in tight contact and prevent the rotating shaft from rotating. A fixing rod is fixed at the lower end of the square rod, and a push rod is fixed at the lower end of the fixing rod. The push rod is parallel to the square rod. A rack is fixed at the end of the push rod away from the fixing rod, and the rack is parallel to the push rod. A toothed ring corresponding to the rack is concentrically mounted on the rotating shaft. The rack can mesh with the toothed ring as it moves away from the donkey head.

[0007] Specifically, the arc-shaped plate has an arc-shaped rope groove on the side away from the walking beam.

[0008] Specifically, the two side plates are fixedly connected by multiple support plates.

[0009] Specifically, the square rod is slidably connected to multiple fixed plates, and the fixed plates are fixedly connected to the walking beam.

[0010] Specifically, the positioning block has an inverted V-shaped groove at the end facing the donkey's head, and the positioning sleeve is a triangular sleeve that is engaged in the groove.

[0011] Specifically, the telescopic pole is an electric telescopic pole.

[0012] Specifically, a lifting member is fixed between the upper ends of the two side plates, and the steel wire rope connecting the suspension rope device is fixed on the lifting member, with the steel wire rope located in the rope groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The square rod is driven to slide by an electric telescopic pole, eliminating the need for manual climbing and completely removing the safety hazards of working at heights in traditional devices. When the telescopic pole moves, the square rod drives the positioning block to disengage from the positioning sleeve, while the rack and pinion mesh with the toothed ring, realizing an automated process of rotating the donkey head to make way, with a seamless operation. The locking structure between the positioning block and the positioning sleeve provides rigid anti-rotation during normal operation, ensuring the stability of the donkey head's swing; during the making way, it disengages from the lock to avoid mechanical interference.

[0015] 2. Compared to traditional worm gear structures, gear meshing transmission has higher efficiency, lower wear rate, and can withstand greater loads, extending service life. The sliding fit between the fixed plate and the square rod ensures the straightness of the transmission path, reducing mechanical losses caused by lateral offset. Support plates reinforce the side plates to prevent deformation due to suspended loads; double-layered fixed shafts on the upper and lower ear plates distribute the force on the shafts, improving the rotational stability of the donkey head.

[0016] 3. The rope groove on the arc plate provides limit protection for the wire rope, reducing friction loss; the lifting components centrally fix the wire rope, simplifying the disassembly and assembly process.

[0017] 4. The inverted V-shaped groove and the triangular sleeve provide a multi-angle contact surface, ensuring that the donkey head accurately returns to its original position during reset, avoiding the deviation problem of traditional pin-type positioning. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the yielding device.

[0019] Figure 2 This is a top view showing the mating of the positioning block and the positioning sleeve.

[0020] The components in the attached diagram are named as follows: 1. Side plate, 2. Arc plate, 3. Rope groove, 4. Lifting component, 5. Support plate, 6. Walking beam, 7. Ear plate, 8. Rotary shaft, 9. Fixing plate, 10. Telescopic rod, 11. Square rod, 12. Fixing rod, 13. Push rod, 14. Rack, 15. Gear ring, 16. Positioning sleeve, 17. Positioning block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: Refer to Figures 1-2 As shown, a donkey head repositioning device for an oil pumping unit includes a donkey head that is rotatably connected to one end of a walking beam 6.

[0023] The donkey head includes two side plates 1. The ends of the two side plates 1 away from the walking beam 6 are fixedly connected by an arc-shaped plate 2. An arc-shaped rope groove 3 is opened on the side of the arc-shaped plate 2 away from the walking beam 6. A lifting member 4 is fixed between the upper ends of the two side plates 1. The steel wire rope connecting the suspension device is fixed on the lifting member 4, and the steel wire rope is located in the rope groove 3.

[0024] Two ear plates 7 are fixed between the two side plates 1, one above the other. The two ear plates 7 are fixedly connected by a vertical rotating shaft 8, which is rotatably connected to one end of the walking beam 6.

[0025] A square rod 11 is slidably mounted on the walking beam 6. Specifically, the square rod 11 is slidably connected to multiple fixed plates 9, and the fixed plates 9 are fixedly connected to the walking beam 6. The sliding direction of the square rod 11 is parallel to the length direction of the walking beam 6, and the square rod 11 slides along the length direction of the walking beam 6. A telescopic rod 10 is fixed on the walking beam 6. The telescopic rod 10 is an electrically operated telescopic rod, which can drive the square rod 11 to slide.

[0026] A positioning block 17 is fixed to the end of the square rod 11 facing the donkey's head, and a positioning sleeve 16 is fixed on the rotating shaft 8. The positioning block 17 and the positioning sleeve 16 are in tight contact and prevent the rotating shaft 8 from rotating.

[0027] Specifically, the positioning block 17 has an inverted V-shaped groove at the end facing the donkey's head, and the positioning sleeve 16 is a triangular sleeve that is snapped into the groove.

[0028] A fixed rod 12 is fixed to the lower end of the square rod 11, and a push rod 13 is fixed to the lower end of the fixed rod 12. The push rod 13 is parallel to the square rod 11. A rack 14 is fixed to the end of the push rod 13 away from the fixed rod 12. The rack 14 is parallel to the push rod 13. A toothed ring 15 corresponding to the rack 14 is concentrically sleeved and fixed on the rotating shaft 8. The rack 14 can mesh with the toothed ring 15 as it moves away from the donkey head.

[0029] When the donkey head is working normally, the walking beam 6 drives the donkey head to swing.

[0030] like Figure 1 As shown, when well workover is required, the suspension rope is separated from the polished rod, and the telescopic rod 10 is activated, causing the telescopic rod 10 to move the square rod 11 and the positioning block 17 to the left. At this time, the fixed rod 12, the push rod 13, and the rack 14 move to the left along with the square rod 11. When the positioning sleeve 16 exits from the groove of the positioning block 17, the rack 14 engages with the toothed ring 15. During the movement of the rack 14 to the left, it can drive the toothed ring 15, the rotating shaft 8, the ear plate 7, and the donkey head to rotate, thereby achieving the purpose of automatic well workover relocation.

[0031] After well repair is completed, the telescopic rod 10 is activated, causing the telescopic rod 10 to move the square rod 11 and the positioning block 17 to the right. At this time, the fixed rod 12, the push rod 13, and the rack 14 move to the right. The rack 14, through the toothed ring 15 and the rotating shaft 8, causes the ear plate 7 and the donkey head to rotate and reset. When the rack 14 separates from the toothed ring 15, the positioning sleeve 16 is inserted into the groove of the positioning block 17. As the square rod 11 and the positioning block 17 continue to move to the right, the donkey head is stabilized when the positioning block 17 is pressed tightly against the positioning sleeve 16.

[0032] Example 2: Based on Example 1, referring to... Figure 1 As shown, the two side plates 1 are fixedly connected by multiple support plates 5.

[0033] The two side plates 1 are fixedly connected by multiple support plates 5, which can improve the stability of the connection between the two side plates 1.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A donkey head repositioning device for an oil pumping unit, comprising a donkey head rotatably connected to one end of a walking beam (6), characterized in that, The donkey head includes two side plates (1). The ends of the two side plates (1) away from the walking beam (6) are fixedly connected by an arc plate (2). Two ear plates (7) are fixed between the two side plates (1) and are arranged vertically. The two ear plates (7) are fixedly connected by a vertical pivot (8). The pivot (8) is rotatably connected to one end of the walking beam (6). A square rod (11) is slidably arranged on the walking beam (6). The sliding direction of the square rod (11) is parallel to the length direction of the walking beam (6). The square rod (11) slides along the length direction of the walking beam (6). A telescopic rod (10) is fixed on the walking beam (6). The telescopic rod (10) can drive the square rod (11) to slide. The square rod (11) faces the donkey head. One end of the shaft (8) is fixed with a positioning block (17), and a positioning sleeve (16) is fixed on the shaft (8). The positioning block (17) and the positioning sleeve (16) are in close contact and prevent the shaft (8) from rotating. A fixing rod (12) is fixed at the lower end of the square rod (11), and a push rod (13) is fixed at the lower end of the fixing rod (12). The push rod (13) is parallel to the square rod (11). A rack (14) is fixed at the end of the push rod (13) away from the fixing rod (12). The rack (14) is parallel to the push rod (13). A toothed ring (15) corresponding to the rack (14) is concentrically fixed on the shaft (8). The rack (14) can mesh with the toothed ring (15) as it moves away from the donkey's head.

2. The donkey head repositioning device for an oil pumping unit according to claim 1, characterized in that, The arc-shaped plate (2) has an arc-shaped rope groove (3) on the side away from the walking beam (6).

3. The donkey head repositioning device for an oil pumping unit according to claim 1, characterized in that, The two side plates (1) are fixedly connected by multiple support plates (5).

4. The donkey head repositioning device for an oil pumping unit according to claim 1, characterized in that, The square rod (11) is slidably connected to multiple fixed plates (9), and the fixed plates (9) are fixedly connected to the walking beam (6).

5. The donkey head repositioning device for an oil pumping unit according to claim 1, characterized in that, The positioning block (17) has an inverted V-shaped groove at the end facing the donkey's head, and the positioning sleeve (16) is a triangular sleeve that is engaged in the groove.

6. The donkey head repositioning device for an oil pumping unit according to claim 1, characterized in that, The telescopic rod (10) is an electric telescopic rod.

7. The donkey head repositioning device for an oil pumping unit according to claim 2, characterized in that, A lifting member (4) is fixed between the upper ends of the two side plates (1), and the steel wire rope connecting the suspension device is fixed on the lifting member (4). The steel wire rope is located in the rope groove (3).

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