Pumping unit stroke adjustment system and method

Abstract

The oil pumping unit stroke adjusting system disclosed by the application belongs to the technical field of oil pumping units and comprises a base, a power device is installed in the base, a support is arranged at the top of the base, a walking beam is connected to the top of the support, a sliding opening is arranged in the walking beam, an adjusting beam and a horse head are slidably connected in the sliding opening, a driving adjusting structure is installed in the sliding opening, and the power device and the driving adjusting structure are connected through a linkage column. The application forms a structure capable of length adjustment through the cooperation of the walking beam and the adjusting beam, thereby facilitating the adjustment of the stroke of the horse head and making the use more flexible. The application further discloses an oil pumping unit stroke adjusting method using the above-mentioned oil pumping unit stroke adjusting system, and specifically comprises the following steps: starting a servo motor, the servo motor drives the adjusting beam to move in the sliding opening, and further drives the horse head to move; at the same time, the servo motor drives a composite shaft to rotate, and further drives the base to move relative to the bracket to complete the stroke adjustment of the oil pumping unit.

Description

Technical Field

[0001] This invention belongs to the field of oil pumping unit technology, specifically relating to an oil pumping unit stroke adjustment system and a method for adjusting the stroke of an oil pumping unit. Background Technology

[0002] A pumping unit is a machine used to extract oil, commonly known as a "nodding donkey". It uses pressure to bring oil out of the well. A pumping unit with a stroke adjustment function is a type of pumping unit that can adjust the stroke.

[0003] In the prior art, Chinese patent CN207647492U discloses a small oil pumping unit, including a base, a bracket, a crank, a suspension rope device, a donkey head, a walking beam, a central bearing seat, a tail walking beam balancing device, a tail bearing seat, a connecting rod crossbeam, a reducer, a fully enclosed guardrail, a crank pin, a braking system, and a motor assembly. The reducer is mounted on the base, and its output shaft is connected to one end of the crank. The crank is connected to a connecting rod hinged to the walking beam at one end via a crossbeam. The bracket on the base supports the middle of the walking beam. A front donkey head is fixed to one end of the walking beam, and a tail walking beam balancing device is located at the other end. The tail of the tail walking beam balancing device has a cylindrical structure and is fixedly locked to the end of the walking beam by a portable safety pin. The counterweight box of the tail walking beam balancing device is designed as a cylinder. The central part of the cylinder is designed in a grid pattern, and an adjustable number of square counterweights can be placed in the grid. Each square counterweight is fixed together by safety pins. The counterweight box has two filling ports, through which granular material can be added as counterweight. One filling port is located at the top of the cylindrical structure, and the other at the bottom. The filling ports are equipped with sealing caps, which are bolted to the counterweight box body. During use, the tail beam balancing device is connected to the walking beam body using a portable safety pin locking method for easy installation. The motor is mounted at the front under the bracket, and the reducer is mounted in the reverse direction, reducing the overall footprint. The walking beam balancing device can increase or decrease its contents according to different well conditions, improving the balancing effect and achieving cost reduction and energy saving. While the above-mentioned existing technical solution can achieve overall balance adjustment through counterweight adjustment, the operability of the adjustable stroke is poor, and its operational flexibility needs further improvement. Summary of the Invention

[0004] The primary objective of this invention is to provide a pumping unit stroke adjustment system that, by setting a drive adjustment structure to adjust the stroke of the adjustment beam, solves the technical problem of inflexible adjustment of the effective stroke of the pumping unit in the prior art.

[0005] The second objective of this invention is to provide a method for adjusting the stroke of an oil pumping unit, which adjusts the base and the adjusting beam simultaneously using a power device, resulting in higher accuracy.

[0006] The first technical solution adopted in this invention is a pumping unit stroke adjustment system, including a base, a power unit installed inside the base, a bracket on the top of the base, a walking beam connected to the top of the bracket, a sliding port inside the walking beam, an adjusting beam slidably connected inside the sliding port, a donkey head installed at the end of the adjusting beam opposite to the sliding port, a drive adjustment structure installed inside the sliding port, the power unit and the drive adjustment structure being connected by a linkage column, and the drive adjustment structure being used for adjusting the sliding of the adjusting beam relative to the sliding port.

[0007] The first technical solution of this invention is further characterized by:

[0008] The drive adjustment structure includes a threaded rod and a transmission rod rotatably connected in the sliding port. The threaded rod is threadedly connected to the adjustment beam, and the transmission rod is connected to the linkage column via a flexible shaft. A large transmission gear is sleeved on the outer wall of the threaded rod, and a small transmission gear is sleeved on the outer wall of the transmission rod. The large transmission gear and the small transmission gear mesh with each other.

[0009] The bottom of the adjusting beam has a notch, and the transmission rod is installed inside the notch.

[0010] The pumping unit stroke adjustment system also includes a bracket, which is located at the bottom of the base and slidably connected to the base. The power unit includes a servo motor fixed in the bracket and a composite shaft rotatably installed in the bracket. The composite shaft is sequentially configured with a smooth rod section, a threaded section, and a prism section along the axial direction. A driven bevel gear is sleeved on the smooth rod section. A drive bevel gear is sleeved on the output shaft of the servo motor. The driven bevel gear and the drive bevel gear mesh with each other. A transmission sleeve is sleeved on the threaded section and fixed to the base. A transmission bevel gear is slidably and rotatably connected to the prism section. A linkage column is connected to a linkage bevel gear at the end that passes through the base. The transmission bevel gear and the linkage bevel gear mesh with each other. A positioning seat is rotatably connected to the side of the transmission bevel gear away from the linkage bevel gear. The positioning seat is slidably connected to the prism section.

[0011] A limit strip and an anti-collision strip are fixedly connected inside the sliding port. The limit strip passes through the adjusting beam and is used to limit the upper limit of the adjusting distance of the adjusting beam. The anti-collision strip is set on both sides of the large transmission gear and the small transmission gear. The distance between the anti-collision strip and the adjusting beam is less than the distance between the large transmission gear and the small transmission gear and the adjusting beam.

[0012] The bracket has a guide port, and a guide tube is fixedly connected inside the guide port. The linkage column is rotatably connected inside the guide tube.

[0013] The base has an observation and maintenance port, and a rotating cover is rotatably connected inside the observation and maintenance port. The rotating cover has a limit protrusion, and the observation and maintenance port has a support groove that matches the limit protrusion. This groove, together with the rotating cover, forms a limit after rotation and closure. The rotating cover has a recessed groove, and a raised hook plate is installed inside the recessed groove.

[0014] The second technical solution adopted in this invention is a method for adjusting the stroke of a pumping unit. Using the aforementioned pumping unit stroke adjustment system, specifically: the servo motor is turned on, the servo motor drives the compound shaft to rotate, which in turn drives the linkage bevel gear to rotate. The linkage bevel gear drives the flexible shaft to rotate, and the flexible shaft drives the transmission rod to rotate. The transmission rod transmits the rotational force to the threaded rod through the large transmission gear and the small transmission gear. The threaded rod drives the adjusting beam to move within the sliding port, which in turn drives the donkey head to move. At the same time, the servo motor drives the compound shaft to rotate, which in turn drives the base to move relative to the bracket, thus completing the stroke adjustment of the pumping unit.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention forms a length-adjustable structure through the cooperation of the walking beam and the adjusting beam, which facilitates the adjustment of the stroke of the donkey head and makes it more flexible in use.

[0017] 2. This invention, through the cooperation of the base and chassis components, enables the installation of the base bracket while facilitating the adjustment of the relative position of the base relative to the bracket, so as to coordinate with the adjustment of the donkey head to form a corresponding adjustment. During the adjustment process, the point of action of the donkey head changes little, and the impact on the oil pumping operation is low.

[0018] 3. The present invention achieves linkage adjustment of the relative displacement between the base and the bracket, as well as the relative displacement between the walking beam and the adjusting beam through the design of the linkage column, which is more practical. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pumping unit stroke adjustment system of the present invention;

[0020] Figure 2 This is a schematic diagram of the sliding port structure in the pumping unit stroke adjustment system of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A;

[0022] Figure 4 This is a schematic diagram of the observation and maintenance port in the pumping unit stroke adjustment system of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the transmission rod and the flexible shaft in the pumping unit stroke adjustment system of the present invention;

[0024] Figure 6 For the present invention Figure 5 A magnified view of the structure at point B in the middle;

[0025] Figure 7 This is a schematic diagram of the power unit in the pumping unit stroke adjustment system of the present invention;

[0026] Figure 8 This is a schematic diagram of the composite shaft in the pumping unit stroke adjustment system of the present invention.

[0027] In the diagram: 1. Bracket, 2. Base, 3. Composite shaft, 4. Smooth rod section, 5. Threaded section, 6. Prismatic section, 7. Driven bevel gear, 8. Servo motor, 9. Drive bevel gear, 10. Transmission sleeve, 11. Transmission bevel gear, 12. Positioning seat, 13. Linkage column, 14. Linkage bevel gear, 15. Adjusting beam, 16. Threaded rod, 17. Transmission rod, 18. Flexible shaft, 19. Large transmission gear, 20. Small transmission gear, 21. Bottom notch, 22. Limiting strip, 23. Anti-collision strip, 24. Guide cylinder, 25. Rotating cover, 26. Limiting protrusion, 27. Recessed groove, 28. Protruding hook plate. Detailed Implementation

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, the pumping unit stroke adjustment system disclosed in this invention includes a base 2, a power unit installed inside the base 2, a bracket on the top of the base 2, a walking beam connected to the top of the bracket, a sliding port inside the walking beam, an adjusting beam 15 slidably connected inside the sliding port, a donkey head installed at the end of the adjusting beam 15 opposite to the sliding port, a drive adjustment structure installed inside the sliding port, and the power unit and the drive adjustment structure connected by a linkage column 13. The drive adjustment structure is used to adjust the sliding of the adjusting beam 15 relative to the sliding port.

[0031] In practical applications, the base 2 is also equipped with a motor assembly and a reducer on its top. A sliding port is located at the right end of the walking beam, and the donkey head is mounted at the right end of the adjusting beam 15. The cooperation between the walking beam and the adjusting beam 15 forms a length-adjustable structure, facilitating the adjustment of the donkey head's stroke and making it more flexible in use. This invention provides power through a power unit, driving the linkage column 13 to rotate. The rotation of the linkage column 13 further drives the adjustment structure to move, causing the adjusting beam 15 to slide within the sliding port, thus adjusting the donkey head's stroke. During the adjustment process, the point of action of the donkey head changes minimally, resulting in less impact on oil pumping operations and making it more practical.

[0032] Example 2

[0033] Based on Example 1, such as Figure 3 , Figure 5 and Figure 6As shown, the drive adjustment structure includes a threaded rod 16 and a transmission rod 17 rotatably connected within a sliding port. The threaded rod 16 is threadedly connected to the adjustment beam 15. Specifically, the adjustment beam 15 has a threaded groove, and the threaded rod 16 is threadedly connected within the threaded groove. The transmission rod 17 is driven by the linkage column 13 via a flexible shaft 18. The threaded rod 16 and the transmission rod 17 are driven by each other. Specifically, a large transmission gear 19 is sleeved on the outer wall of the threaded rod 16, and a small transmission gear 20 is sleeved on the outer wall of the transmission rod 17. The large transmission gear 19 and the small transmission gear 20 mesh with each other. When the servo motor 8 is working, the transmission rod 17 is driven by the flexible shaft 18. The rotation of rod 8 drives the transmission rod 17 to rotate. Since the transmission rod 17 and the threaded rod 16 are equipped with a large transmission gear 19 and a small transmission gear 20 that mesh with each other, the rotation of the transmission rod 17 drives the small transmission gear 20 to rotate, which in turn drives the large transmission gear 19 to rotate, ultimately achieving synchronous rotation of the transmission rod 17 and the threaded rod 16. The bottom of the adjusting beam 15 has a bottom notch 21, and the transmission rod 17 is installed in the bottom notch 21. The bottom notch 21 provides transmission space for the transmission rod 17, making the structure more compact. During the adjustment of the donkey head, the transmission rod 17 will not be interfered with by the movement of the adjusting beam 15.

[0034] Example 3

[0035] Based on Example 1, such as Figure 7 and Figure 8 As shown, the pumping unit stroke adjustment system also includes a bracket 1, which is located at the bottom of the base 2 and slidably connected to the base 2. The power unit includes a servo motor 8 fixedly connected in the bracket 1, and also includes a composite shaft 3 rotatably installed in the bracket 1. Specifically, both ends of the composite shaft 3 are sleeved in the body of the bracket 1 through thrust bearings to provide support. The composite shaft 3 is sequentially configured with a smooth section 4, a threaded section 5, and a prism section 6 along the axial direction. Figure 7As shown, the composite shaft 3 consists of a prism section 6, a threaded section 5, and a smooth rod section 4 from left to right. A driven bevel gear 7 is sleeved on the smooth rod section 4. A drive bevel gear 9 is sleeved on the output shaft of the servo motor 8. The driven bevel gear 7 and the drive bevel gear 9 mesh with each other. When the servo motor 8 works, it drives the drive bevel gear 9 to rotate. The drive bevel gear 9 further drives the driven bevel gear 7 to rotate. The driven bevel gear 7 drives the composite shaft 3 to rotate. A transmission sleeve 10 is sleeved on the threaded section 5. The transmission sleeve 10 is fixedly connected to the base 2. When the composite shaft 3 rotates, the transmission sleeve 10 drives the base 2 to move relative to the bracket 1. A transmission bevel gear 11 is slidably and rotatably connected on the prism section 6. A linkage column 13 passes through the end of the base 2 and is connected to a linkage bevel gear 14. Specifically, a vertical hole is opened on the base 2. The linkage column 13 is rotatably connected in the vertical hole. The bottom end of the linkage column 13 is fixedly connected to the linkage bevel gear 14. The transmission bevel gear 11 and the linkage bevel gear 14 mesh with each other. A positioning seat 12 is rotatably connected to the side of the transmission bevel gear 11 away from the linkage bevel gear 14. When the base 2 moves relative to the bracket 1, the prism segment 6 drives the transmission bevel gear 11 to rotate, which in turn drives the linkage bevel gear 14 to rotate. The positioning seat 12 is slidably connected on the prism segment 6. In the specific design, the distance between the positioning seat 12 and the linkage bevel gear 14 is exactly the size at which the transmission bevel gear 11 meshes with the linkage bevel gear 14. Therefore, when the positioning seat 12 moves, it drives the transmission bevel gear 11 to move, and simultaneously, the linkage bevel gear 14 moves synchronously. The transmission bevel gear 11 and the linkage bevel gear 14 remain relatively stationary in position, ensuring that the linkage column 13 does not stop moving when the base 2 moves relative to the bracket 1.

[0036] The present invention achieves the installation of the support of the base 2 and the bracket 1, while facilitating the adjustment of the relative position of the base 2 with respect to the bracket 1, so as to cooperate with the adjustment of the donkey head to form a corresponding adjustment. During the adjustment process, the point of action of the donkey head changes little, and the impact on the oil pumping operation is low.

[0037] Furthermore, a limiting strip 22 and an anti-collision strip 23 are fixedly connected inside the sliding port. The limiting strip 22 passes through the adjusting beam 15 and is used to limit the upper limit of the adjustment distance of the adjusting beam 15. The anti-collision strip 23 is set on both sides of the large transmission gear 19 and the small transmission gear 20. The distance between the anti-collision strip 23 and the adjusting beam 15 is less than the distance between the large transmission gear 19 and the small transmission gear 20 and the adjusting beam 15, so as to avoid interference between the adjusting beam 15 and the large transmission gear 19 and the small transmission gear 20 during adjustment.

[0038] Furthermore, a guide opening is provided on the bracket, and a guide cylinder 24 is fixedly connected inside the guide opening. The linkage column 13 is rotatably connected inside the guide cylinder 24.

[0039] Furthermore, such as Figure 4As shown, the base 2 has an observation and maintenance port, which facilitates access to the bottom of the base 2 for maintenance of equipment such as the servo motor 8. A rotating cover 25 is rotatably connected inside the observation and maintenance port. The rotating cover 25 is provided with a limit protrusion 26. The observation and maintenance port is provided with a support groove that matches the limit protrusion 26, which works with the rotating cover 25 to form a limit after rotation and closure. The rotating cover 25 is provided with a recessed groove 27, and a protruding hook plate 28 is provided in the recessed groove 27 to facilitate the application of force during the opening of the rotating cover 25.

[0040] This invention also discloses a method for adjusting the stroke of a pumping unit. Using the aforementioned pumping unit stroke adjustment system, specifically: The servo motor 8 is activated, which drives the composite shaft 3 to rotate, further driving the linkage bevel gear 14 to rotate. The linkage bevel gear 14 drives the flexible shaft 18 to rotate, and the flexible shaft 18 drives the transmission rod 17 to rotate. The transmission rod 17 transmits the rotational force to the threaded rod 16 through the large transmission gear 19 and the small transmission gear 20. The threaded rod 16 drives the adjusting beam 15 to move within the sliding port, further driving the donkey head to move. Simultaneously, the servo motor 8 drives the composite shaft 3 to rotate, further driving the base 2 to move relative to the bracket 1, thus completing the stroke adjustment of the pumping unit.

Claims

1. A pumping unit stroke adjustment system, characterized in that, Includes a base (2), a power device is installed inside the base (2), a bracket is provided on the top of the base (2), a walking beam is connected to the top of the bracket, a sliding port is provided inside the walking beam, an adjusting beam (15) is slidably connected inside the sliding port, a donkey head is installed on the end of the adjusting beam (15) away from the sliding port, a drive adjustment structure is installed inside the sliding port, the power device and the drive adjustment structure are connected by a linkage column (13), and the drive adjustment structure is used to adjust the sliding of the beam (15) relative to the sliding port; The drive adjustment structure includes a threaded rod (16) and a transmission rod (17) rotatably connected in the sliding port. The threaded rod (16) is threadedly connected to the adjustment beam (15), and the transmission rod (17) is connected to the linkage column (13) via a flexible shaft (18). A large transmission gear (19) is sleeved on the outer wall of the threaded rod (16), and a small transmission gear (20) is sleeved on the outer wall of the transmission rod (17). The large transmission gear (19) and the small transmission gear (20) mesh with each other. The pumping unit stroke adjustment system also includes a bracket (1), which is located at the bottom of the base (2) and slidably connected to the base (2). The power unit includes a servo motor (8) fixed in the bracket (1) and a composite shaft (3) rotatably disposed in the bracket (1). The composite shaft (3) is sequentially configured with a smooth rod section (4), a threaded section (5), and a prism section (6) along the axial direction. A driven bevel gear (7) is sleeved on the smooth rod section (4). A drive bevel gear (9) is sleeved on the output shaft of the servo motor (8). Gear (7) and drive bevel gear (9) mesh with each other. A transmission sleeve (10) is sleeved on the threaded section (5). The transmission sleeve (10) is fixedly connected to the base (2). A transmission bevel gear (11) is rotatably connected on the prism section (6). A linkage bevel gear (14) is connected to the end of the linkage column (13) that passes through the base (2). The transmission bevel gear (11) and the linkage bevel gear (14) mesh with each other. A positioning seat (12) is rotatably connected to the side of the transmission bevel gear (11) that is away from the linkage bevel gear (14). The positioning seat (12) is slidably connected on the prism section (6).

2. The pumping unit stroke adjustment system according to claim 1, characterized in that, The bottom of the adjusting beam (15) has a bottom notch (21), and the transmission rod (17) is installed in the bottom notch (21).

3. The pumping unit stroke adjustment system according to claim 1, characterized in that, A limiting strip (22) and a collision protection strip (23) are fixedly connected inside the sliding port. The limiting strip (22) passes through the adjusting beam (15) and is used to limit the upper limit of the adjustment distance of the adjusting beam (15). The collision protection strip (23) is set on both sides of the large transmission gear (19) and the small transmission gear (20). The distance between the collision protection strip (23) and the adjusting beam (15) is less than the distance between the large transmission gear (19) and the small transmission gear (20) and the adjusting beam (15).

4. The pumping unit stroke adjustment system according to claim 1, characterized in that, The bracket has a guide opening, and a guide tube (24) is fixedly connected inside the guide opening. The linkage column (13) is rotatably connected inside the guide tube (24).

5. The pumping unit stroke adjustment system according to claim 1, characterized in that, The base (2) has an observation and maintenance opening. A rotating cover (25) is rotatably connected inside the observation and maintenance opening. A limiting protrusion (26) is provided on the rotating cover (25). A support groove matching the limiting protrusion (26) is provided inside the observation and maintenance opening. The support groove cooperates with the rotating cover (25) to form a limiting position after rotation and closure. A recessed groove (27) is provided on the rotating cover (25). A protruding hook plate (28) is provided inside the recessed groove (27).

6. A method for adjusting the stroke of an oil pumping unit, using the oil pumping unit stroke adjustment system as described in claim 1, characterized in that, Specifically: the servo motor (8) is turned on, the servo motor (8) drives the composite shaft (3) to rotate, which in turn drives the linkage bevel gear (14) to rotate. The linkage bevel gear (14) drives the linkage column (13) to rotate. The linkage column (13) drives the flexible shaft (18) to rotate. The flexible shaft (18) drives the transmission rod (17) to rotate. The transmission rod (17) transmits the rotational force to the threaded rod (16) through the large transmission gear (19) and the small transmission gear (20). The threaded rod (16) drives the adjusting beam (15) to move in the sliding port, which in turn drives the donkey head to move. At the same time, the servo motor (8) drives the composite shaft (3) to rotate, which in turn drives the base (2) to move relative to the bracket (1), thus completing the stroke adjustment of the pumping unit.

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