Multi-connecting-rod power rotation driving device

Abstract

The multi-connecting-rod power rotation driving device comprises a frame body, a check ring is installed in an installation groove in the upper end of the frame body, and the inner end of the check ring is fixed to the frame body through a first shaft; an oil-gas cylinder, a first connecting rod, a third connecting rod and a second connecting rod are arranged in the frame body, the tail end of a cylinder body of the oil-gas cylinder is hinged to the frame body, the end of a piston rod of the oil-gas cylinder is hinged to the upper end of the first connecting rod, the long end of the first connecting rod is hinged to the frame body through an upper pin shaft in a double-shaft assembly, and a lower pin shaft in the double-shaft assembly is hinged to the upper end of the second connecting rod. The lower end of the third connecting rod is hinged with the middle part of the second connecting rod; the lower end of the connecting rod II is butted with the swing arm. The device is more reasonable in structural arrangement, low in production cost and small in occupied space, automatic reset can be rapidly achieved after the driving function action is completed, interaction synchronism is good in the tubular column treatment process, and the operation steps of the well drilling and repairing technology are simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of automated power equipment and relates to a multi-link power rotary drive device. Background Art

[0002] Power rotary drive devices are widely used in automated equipment for drilling and well repair operations. Existing automated equipment uses a direct drive method of a swing cylinder with a gear rack transmission. The hydraulic components take up a large space and have a high procurement cost. The transmission end uses a spline and flat key transmission method, and the installation accuracy is high. When the drive is in place and the driven part completes the functional action, the conventional drive method cannot achieve rapid automatic reset. Poor synchronization causes hard-connected transmission parts to easily cause impact failure. The remote button control in the driller's room is difficult, and the coordination requirements for the operators handling the pipe string are high. In addition, repetitive operations are time-consuming and labor-intensive, and there are great safety risks. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-link power rotary drive device, which solves the problems of the prior art using gear rack drive, large space occupied by hydraulic components, invariable transmission direction, and inability of conventional drive to provide synchronous automatic reset function.

[0004] The technical solution adopted by the present invention is a multi-link power rotation drive device, including a frame, a retaining ring is installed in the installation groove at the upper end of the frame, and the inner end of the retaining ring is fixed to the frame through shaft one; an oil and gas cylinder, connecting rod one, connecting rod three and connecting rod two are respectively arranged inside the frame, the cylinder body end of the oil and gas cylinder is hinged to the frame, the piston rod end of the oil and gas cylinder is hinged to the upper end of connecting rod one, the long end of connecting rod one is hinged to the frame through the upper pin shaft in the double-axis assembly, and the lower pin shaft in the double-axis assembly is hinged to the upper end of connecting rod two; the short end of connecting rod one is hinged to the upper end of connecting rod three, and the lower end of connecting rod three is hinged to the middle part of connecting rod two; the lower end of connecting rod two is connected to the swing arm.

[0005] The multi-link power rotary drive device of the present invention is also characterized in that:

[0006] The butt joint of the swing arm and the second connecting rod is provided with a cross matching slot, the butt joint of the swing arm and the second connecting rod is hinged by a fixing bolt after being plugged in, and a fixing bolt sliding slot is provided at the lower end of the swing arm slot.

[0007] The retaining ring is a split semicircular ring structure, and the inner wall of the retaining ring is provided with a replaceable bushing and a protective sleeve.

[0008] The oil-gas cylinder is bounded by the piston, with one side being an oil chamber and the other side being an air chamber.

[0009] An angle adjustment bolt is installed on the lower step end face of the connecting rod 2, and a groove is opened at the hinged end of the connecting rod 2 and the connecting rod 3. An angle adjustment plate is arranged in the groove. The upper end of the angle adjustment plate is also mounted on the shaft 5 and can rotate around the shaft 5.

[0010] The beneficial effects of the present invention are that the structural setting is more reasonable, the production cost is low, the space occupied is small, and the automatic reset can be quickly realized after the driving function is completed. The interactive synchronization is good during the pipe string processing process, which simplifies the drilling and well repair process operation steps, reduces the difficulty and risk of operation for operators, eliminates safety hazards in oil field operations, improves the efficiency of drilling and well repair operations, and increases the reliability of automated equipment, thereby achieving the purpose of rapid exploitation and cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the state of the device of the present invention before the function is activated;

[0012] Figure 2 for Figure 1 Left view of;

[0013] Figure 3 It is a schematic diagram of the local structure of the angle adjustment plate in the device of the present invention;

[0014] Figure 4 It is a schematic diagram of the installation structure of the replaceable bushing and sheath in the device of the present invention.

[0015] In the figure, 1. swing arm, 2. connecting rod one, 3. connecting rod two, 4. connecting rod three, 5. frame, 6. retaining ring, 7. angle adjustment plate, 8. shaft one, 9. shaft two, 10. shaft three, 11. upper pin shaft, 12. angle adjustment bolt, 13. fixing bolt, 14. oil and gas cylinder, 15. replaceable bushing, 16. sleeve, 17. shaft four, 18. shaft five, 19. lower pin shaft. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Reference Figure 1 , Figure 2 The structure of the multi-link power rotation driving device of the present invention is that it includes a frame body 5 as an installation body, a retaining ring 6 is installed in the installation groove at the upper end of the frame body 5, the retaining ring 6 is a split semicircular ring structure, and a shaft 8 is installed perpendicular to the opening direction of the installation groove. The inner end of the retaining ring 6 is fixed to the frame body 5 through the shaft 8, and the retaining ring 6 as a whole can realize a small angle range of rotation around the shaft 8;

[0018] The frame 5 is provided with an oil and gas cylinder 14, a connecting rod 1 2, a connecting rod 3 4 and a connecting rod 2 3 respectively inside. The cylinder end of the oil and gas cylinder 14 is hinged to the frame 5 through the shaft 2 9 (fixed pin), the piston rod end of the oil and gas cylinder 14 is hinged to the upper end of the connecting rod 1 2 through the shaft 3 10, the long end (fixed end) of the connecting rod 1 2 is hinged to the frame 5 through the upper pin 11 in the double-shaft assembly, and the lower pin 19 in the double-shaft assembly is hinged to the upper end (fixed end) of the connecting rod 2 3; the short end (movable end) of the connecting rod 1 2 is hinged to the upper end of the connecting rod 3 4 through the shaft 4 17, and the lower end of the connecting rod 3 4 is hinged to the middle part (movable end) of the connecting rod 2 3 through the shaft 5 18, forming a closed loop and together forming a multi-rod mechanism;

[0019] The lower end of the connecting rod 2 3 is connected to the swing arm 1, and the connecting part between the swing arm 1 and the connecting rod 2 3 is provided with a cross matching slot. The connecting part of the swing arm 1 and the connecting rod 2 3 is hinged by a fixing bolt 13 after being inserted. The lower end of the slot of the swing arm 1 is provided with a sliding groove for the fixing bolt 13 to ensure that when the connecting rod 2 3 rotates around the fixing bolt 13, the entire connecting rod mechanism and the frame can slide left and right along the sliding groove of the swing arm 1, thereby playing a role in adjusting the horizontal distance between the swing arm 1 and the retaining ring 6.

[0020] The oil-gas cylinder 14 is the driving input rod, and the swing arm 1 is the rotating output rod. The oil-gas cylinder 14 is bounded by the piston, with one side being the oil chamber and the other side being the air chamber, and the air chamber is inflated according to the required internal pressure. The oil-gas cylinder 14 provides a power source, and the cylinder body of the oil-gas cylinder 14 rotates around the shaft 2 9. The end of the piston rod of the oil-gas cylinder 14 is connected to the connecting rod 1 2 through the shaft 3 10, driving the overall movement of the multi-link mechanism, and finally driving the connecting rod 2 3 to drive the swing arm 1 to rotate perpendicular to the connecting rod plane.

[0021] The connecting rod 1 2 and the connecting rod 2 3 are collectively called the connecting rod, and the hinged ends of the connecting rod 1 2 and the connecting rod 2 3 are hinged to the frame 5 through the upper pin 11 in the double-axis assembly, and are fixedly supported by the frame 5; the connecting rod 3 4 is a connecting rod.

[0022] Reference Figure 3 An angle adjusting bolt 12 is installed on the lower step end face of the connecting rod 2 3. A groove is formed on the hinged end of the connecting rod 2 3 and the connecting rod 3 4. An angle adjusting plate 7 is arranged in the groove. The upper end of the angle adjusting plate 7 is also mounted on the shaft 5 18 and can rotate around the shaft 5 18. The angle after rotation is limited by the angle adjusting bolt 12. By changing the screw-in length of the angle adjusting bolt 12, the angle adjusting plate 7 can be driven to rotate forward and reverse. The maximum rotation angle of the swing arm 1 is controlled by relying on the limiting effect of the angle adjusting plate 7 on the contact surface of the connecting rod 3 4.

[0023] Reference Figure 4 The split retaining ring 6 is a semicircular ring structure, which is hinged into a whole by bolts. The inner wall of the retaining ring 6 is provided with a replaceable bushing 15 and a sheath 16. The replaceable bushing 15 and the sheath 16 have corresponding convex and concave groove structures. The two are paired and screwed together and vulcanized into one, which can meet the clamping needs of tools with different outer diameters.

[0024] The above multi-link mechanism can transform the rotational motion in the vertical plane into the rotational motion in the horizontal plane. The force transmission in the motion process is stable and the transmission angle is accurate. The swing arm 1 has an amplifying effect on the rotation output angle. The maximum angle of the rotation output of the swing arm 1 can be precisely controlled.

[0025] The oil-gas cylinder 14 has an automatic reset function, and the reset speed is adjustable. The automatic reset function of the oil-gas cylinder 14 is similar to the function of a gas spring. The transmission form includes but is not limited to a gas-liquid combination, and the structural form includes but is not limited to a double-chamber series connection. The above-mentioned rotation and translation functions facilitate the adjustment of the relative distance from the center of the retaining ring 6 to the swing arm 1.

[0026] The working process of the present invention is:

[0027] The oil and gas cylinder 14 provides a power source and serves as a driving input rod. Under the action of hydraulic power, the piston rod pushes the multi-link mechanism to rotate around the fixed hinge fulcrum of the frame 5 (the two fixed fulcrums are fixed to the frame 5 through two double-axis components), and the connecting rod 3 4 transmits power to push the swing arm 1 to rotate in a plane perpendicular to the multi-link, completing the rotation of the driven part connected to the swing arm 1. In addition, before the multi-link power rotation drive device works, the air cavity of the oil and gas cylinder 14 is inflated, and the air cavity internal pressure is preset according to the torque required for the rotation of the driven part. When the driven body rotates into place, after the hydraulic power is depressurized, the driven body is automatically reset synchronously under the action of the air cavity internal pressure.

[0028] Example 1

[0029] Changing the screwing length of the angle adjustment bolt 12 in the swing arm 1 can change the distance between the contact surface of the angle adjustment plate 7 and the connecting rod 3 4, which plays a role in controlling the maximum rotation angle of the driven body. Specifically, screwing in the angle adjustment bolt 12 makes the contact surface of the angle adjustment plate 7 and the connecting rod 3 4 closer, and the maximum rotation angle of the driven body will become smaller. Conversely, screwing out the angle adjustment bolt 12 makes the contact surface of the angle adjustment plate 7 and the connecting rod 3 4 farther, and the maximum rotation angle of the driven body will become larger.

[0030] Example 2

[0031] The replaceable bushing 15 and the protective sleeve 16 in the retaining ring 6 can be replaced with the replaceable bushing 15 and the protective sleeve 16 of corresponding size specifications according to the outer diameter matching requirements of the clamped tool.

[0032] Example 3

[0033] The size of the inflation pressure in the air cavity of the oil-gas cylinder 14 affects the reset speed of the driven body. Specifically, the larger the pre-inflation pressure in the air cavity, the faster the reset speed of the driven body. Conversely, the smaller the pre-inflation pressure in the air cavity, the slower the reset speed of the driven body.

Claims

1. A multi-link power rotary drive device, characterized in that: The invention comprises a frame (5), a retaining ring (6) is installed in the installation groove at the upper end of the frame (5), and the inner end of the retaining ring (6) is fixed to the frame (5) through the shaft (8); an oil cylinder (14), a connecting rod (2), a connecting rod (4) and a connecting rod (3) are respectively arranged inside the frame (5); the cylinder end of the oil cylinder (14) is hinged to the frame (5), the piston rod end of the oil cylinder (14) is hinged to the upper end of the connecting rod (2), the long end of the connecting rod (2) is hinged to the frame (5) through the upper pin shaft (11) in the double-axis assembly, and the lower pin shaft (19) in the double-axis assembly is hinged to the upper end of the connecting rod (3); the short end of the connecting rod (2) is hinged to the upper end of the connecting rod (4), and the lower end of the connecting rod (4) is hinged to the middle part of the connecting rod (3); the lower end of the connecting rod (3) is butt-jointed to the swing arm (1).

2. The multi-link power rotary drive device according to claim 1, characterized in that: The butt joint of the swing arm (1) and the second connecting rod (3) is provided with a cross matching slot. After the butt joint of the swing arm (1) and the second connecting rod (3) is plugged in, it is hinged by a fixing bolt (13). The lower end of the slot of the swing arm (1) is provided with a sliding slot for the fixing bolt (13).

3. The multi-link power rotary drive device according to claim 1, characterized in that: The retaining ring (6) is a split semicircular ring structure, and the inner wall of the retaining ring (6) is provided with a replaceable bushing (15) and a protective sleeve (16).

4. The multi-link power rotary drive device according to claim 1, characterized in that: The oil-gas cylinder (14) is bounded by the piston, with one side being an oil chamber and the other side being an air chamber.

5. The multi-link power rotary drive device according to claim 1, characterized in that: An angle adjustment bolt (12) is installed on the lower step end surface of the connecting rod 2 (3), and a groove is formed at the hinged end of the connecting rod 2 (3) and the connecting rod 3 (4). An angle adjustment plate (7) is arranged in the groove. The upper end of the angle adjustment plate (7) is also mounted on the shaft 5 (18) and can rotate around the shaft 5 (18).

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