A tubing lift conveyor

Abstract

The utility model discloses an oil pipe lifting conveyor belongs to oil well repairing equipment technical field. It includes base, lifting beam, lifting mechanism, the lifting mechanism includes lifting push rod, push frame, connecting frame, drive mechanism, the upper end of lifting push rod is hinged with lifting beam, and the lower extreme of lifting push rod is connected with lifting roller and guide roller I, and push frame is movably arranged in the base, and the upper portion of push frame has the variable angle inclined plane formed by the inclined plane of different slope of many sections, and the slope of each section gradually increases from bottom to top, and the lower extreme of lifting push rod is movably matched with the variable angle inclined plane of the upper portion of push frame through its lifting roller, and the guide roller I of lifting push rod lower extreme is movably matched with the guide frame fixed in the side surface of base, and the drive mechanism includes push -pull rod, motor and speed reducer fixed in base, chain transmission mechanism, and one end of push -pull rod is connected with the chain of chain transmission mechanism, and the other end is hinged with the connecting frame fixed in one end of push frame.

Description

Technical Field

[0001] This utility model relates to a tubing lifting and conveying machine, and more particularly to a tubing lifting and conveying machine with an electrically driven lifting mechanism, belonging to the field of oil well workover equipment technology. Background Technology

[0002] During minor well repairs, a workover rig is used to retrieve the tubing from the well. After inspection and repair, the tubing is then lowered back into the well. Because there are many tubing sections, they need to be temporarily stored on the surface after retrieval. This requires a lift conveyor system working in conjunction with the workover rig to move the tubing back and forth between the wellhead and the surface. Since there is a 3-4 meter height difference between the wellhead and the surface, one end of the tubing needs to be raised during transport, and the tubing also needs to be moved back and forth. The lift conveyor system is used to raise one end of the tubing.

[0003] Traditional lifting machines use hydraulic power, with hydraulic cylinders driving the lifting beam to rotate around a rear swing shaft. This type of lifting equipment requires a hydraulic station and pipelines connecting the hydraulic power source and actuators. Because the hydraulic system is sealed and some pipelines use rubber components, oil leaks are prone to occur due to the aging of these rubber components. This results in two problems: wasted hydraulic oil and soil pollution from leaked hydraulic oil. Furthermore, the hydraulic pumps used in this hydraulically driven system are typically quite noisy, causing noise pollution.

[0004] For the reasons mentioned above, electrically driven lifts have also emerged. Currently, there are various forms of electrically driven lifting mechanisms, the most common being electric cylinders and screw jacks. These two mechanisms operate on the same principle: a motor drives a screw and nut to convert rotary motion into linear motion. Electric cylinders use ball screws and nuts, which are rolling joints, while screw jacks use ordinary screws and nuts, which are sliding joints. Therefore, the latter has a very low speed and is unsuitable for applications requiring high speed. While electric cylinders offer high speed and precision, their complex structure and high cost make them 1-2 times more expensive than hydraulically driven systems, resulting in higher equipment costs. Utility Model Content

[0005] In view of the above-mentioned defects in the existing technology, this utility model provides an oil pipe lifting and conveying machine with fast lifting speed, reliable lifting, low cost and no environmental pollution.

[0006] This utility model is achieved through the following technical solution: an oil pipe lifting conveyor, comprising a base, a lifting beam, and a lifting mechanism, wherein one end of the lifting beam is hinged to one end of the base, characterized in that: the lifting mechanism includes a lifting push rod, a push frame, a connecting frame, and a drive mechanism; the upper end of the lifting push rod is hinged to the lifting beam, and the lower end of the lifting push rod is connected to a lifting roller and a guide roller I; the push frame is movably disposed within the base, and the upper part of the push frame has a variable angle formed by multiple inclined planes with different slopes. The slope of each section of the inclined plane gradually increases from bottom to top. The lower end of the lifting push rod is movably engaged with the variable-angle inclined plane on the upper part of the push frame through its lifting roller. The guide roller I at the lower end of the lifting push rod is movably engaged with the guide frame fixed on the side of the base. The drive mechanism is set inside the base. The drive mechanism includes a push-pull rod, a motor and reducer fixed to the base, and a chain drive mechanism. One end of the push-pull rod is connected to the chain of the chain drive mechanism, and the other end of the push-pull rod is hinged to the connecting frame fixed to one end of the push frame.

[0007] The working process of this utility model is as follows: When the lifting beam needs to be lifted, the chain transmission mechanism is driven by the motor and reducer. When the chain is driven, it drives the rolling frame to push the push rod, the connecting frame, and the push frame to move forward together. When the push frame moves forward, it lifts the lifting push rod upward. The lifting roller at the lower end of the lifting push rod moves along the variable angle inclined plane of the push frame. At the same time, the guide roller I moves along the guide frame, so that the lifting push rod is lifted upward and moves along the guide frame at the same time, thereby pushing the lifting beam to rotate around its hinge point with the base and lift the front end, thus realizing the lifting function.

[0008] Furthermore, the variable-angle inclined plane is composed of four inclined planes with different slopes.

[0009] Furthermore, to prevent chain wear, a rolling frame with rollers is connected to the chain of the chain drive mechanism, and one end of the push-pull rod is hinged to the rolling frame. The rollers of the rolling frame can roll in contact with the plane of the lower support frame, which can prevent chain wear and extend the chain's service life.

[0010] Furthermore, the pusher frame is a frame structure, which includes two parallel upright plates that are fixed together by a support plate. The upper surface of both upright plates has the variable-angle inclined surface. The lower end of the lifting push rod is connected to two lifting rollers and two guide rollers I through a rotating shaft. A guide frame is fixed on each side of the base. The two lifting rollers cooperate with the variable-angle inclined surfaces of the two upright plates, and the two guide rollers I cooperate with the two guide frames.

[0011] Furthermore, the guide frame is inclined.

[0012] Furthermore, to ensure reliable movement of the push frame, a horizontal moving guide rail is provided inside the base, and a guide roller II is provided at the bottom of the push frame to cooperate with the horizontal moving guide rail.

[0013] The beneficial effects of this utility model are as follows: The lifting mechanism adopted by this utility model provides stable and reliable lifting of the lifting beam, with a fast lifting speed, which can meet the needs of applications with high speed requirements. Furthermore, the overall cost of the lifting mechanism is low, which can reduce equipment costs. Moreover, the lifting mechanism is electrically driven and does not pollute the environment, effectively solving the problem of hydraulic oil leakage and environmental pollution in existing hydraulically driven lifting machines. The variable-angle inclined plane on the upper part of the push frame in this utility model is composed of four sections of inclined planes with different slopes. Within each section, the thrust output by the chain is basically the same, and the power output by the motor is basically constant, avoiding the waste of motor power. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 An enlarged view of the left side of the middle section;

[0016] Figure 3 yes Figure 1 Enlarged schematic diagram of the middle chain drive mechanism;

[0017] Figure 4 yes Figure 1 CC section view diagram;

[0018] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the diagram;

[0019] Figure 6 yes Figure 1 EE sectional view diagram;

[0020] Figure 7 yes Figure 6 An enlarged schematic diagram of part B in the diagram;

[0021] Figure 8 yes Figure 1 DD sectional view diagram;

[0022] Figure 9 This is a three-dimensional structural schematic diagram of the present invention;

[0023] In the diagram, 1. Base, 2. Lifting push rod, 3. Lifting beam, 4. Clamp and pulley, 5. Push frame, 6. Guide frame, 7. Connecting frame, 8. Driven sprocket, 9. Push-pull rod, 10. Rolling frame, 11. Fixed frame, 12. Chain, 13. Drive sprocket, 14. Motor and reducer, 15. Swing shaft, 16. Horizontal moving guide rail, 17. Guide roller II, 18. Lifting roller, 19. Guide roller I, 20. Rotating shaft;

[0024] 5.1 Variable angle inclined plane, 5.2 Vertical plate, 5.3 Support plate. Detailed Implementation

[0025] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0026] As shown in the attached figure, an oil pipe lifting and conveying machine includes a base 1, a lifting beam 3, and a lifting mechanism. The base 1 is a frame structure welded from rectangular tubes. The lifting beam 3 is a prior art structure, which is telescopic and can be driven to extend and retract by a drive mechanism. One end of the lifting beam 3 is hinged to one end of the base 1 via a swing shaft 15. The lifting beam 3 is equipped with clamps and trolleys 4, which can clamp the oil pipe and move it. The clamps and trolleys 4 are prior art. The lifting mechanism is used to lift the lifting beam 3 to a certain height. The lifting mechanism includes a lifting push rod 2, a push frame 5, a connecting frame 7, and a drive mechanism. The upper end of the lifting push rod 2 is hinged to the lifting beam 3, and the lower end of the lifting push rod 2 is connected to a lifting roller 18 and a guide roller I 19. The push frame 5 is movably installed in the base 1. The upper part of the push frame 5 has a variable-angle inclined plane 5.1 formed by multiple inclined planes with different slopes. The slope of each inclined plane gradually increases from bottom to top. The lower end of the lifting push rod 2 is movably engaged with the variable-angle inclined plane 5.1 on the upper part of the push frame 5 through its lifting roller 18. The guide roller I 19 at the lower end of the lifting push rod 2 is movably engaged with a guide roller fixed on the side of the base 1. The drive mechanism is mounted on the base 1 via a fixed frame 11 and is located near the hinged end of the lifting beam. The fixed frame 11 is fixedly connected to the base 1. The drive mechanism includes a motor and reducer 14, a push-pull rod 9, and a chain drive mechanism. The motor and reducer 14 are fixedly mounted on one end of the fixed frame 11. The drive sprocket 13 of the chain drive mechanism is mounted on the reducer output shaft of the motor and reducer 14. The driven sprocket 8 of the chain drive mechanism is mounted on the other end of the fixed frame 11 via a support. One end of the push-pull rod 9 is connected to the chain 12 of the chain drive mechanism, and the other end of the push-pull rod 9 is hinged to the end of the connecting frame 7. To prevent chain wear, in this embodiment, a rolling frame 10 with rollers is connected to the chain 12 of the chain drive mechanism. The push-pull rod 9 is connected to the chain 12 through the rolling frame 10 and is hinged to the rolling frame 10. The rollers of the rolling frame 10 can contact the surface of the fixed frame 11, which can prevent the chain from contacting the surface of the fixed frame 11 and wearing out.

[0027] In this utility model, the chain 12 of the chain transmission mechanism can drive the push rod 9 to move and push the push frame 5 to move forward. When the push frame 5 moves forward, it lifts the lifting push rod 2 upward. The lifting roller 18 at the lower end of the lifting push rod 2 moves along the variable angle inclined plane 5.1 of the push frame 5. At the same time, the guide roller I 19 moves along the guide frame 6, so that the lifting push rod 2 is lifted upward and moves forward along the guide frame 6, thereby pushing the lifting beam 3 to rotate around the swing axis 15 and lift the front end, thus realizing the lifting function.

[0028] In this invention, the variable-angle inclined plane 5.1 is composed of multiple inclined planes with different slopes. Since the lifting force gradually decreases with the change in lifting height, the lifting resistance of the lifting push rod 2 is relatively large in the initial stage of lifting the lifting beam. Therefore, the first section of the variable-angle inclined plane 5.1 of the push frame 5 has a smaller slope and a larger force amplification ratio. As the lifting beam's lifting angle increases, the lifting force gradually decreases, so the slope of the push frame's inclined plane gradually increases, and the force amplification ratio gradually decreases, thereby ensuring constant power output from the motor. In this embodiment, the variable-angle inclined plane 5.1 is composed of four inclined planes with different slopes. Within each section, the thrust output by the chain is basically the same, and the power output by the motor is basically constant, avoiding waste of motor power.

[0029] To ensure reliable operation of the equipment, in this embodiment, the push frame 5 is a frame structure, comprising two parallel upright plates 5.2, which are fixed together by multiple support plates 5.3. The upper surfaces of both upright plates 5.2 have the variable-angle inclined surfaces 5.1. A rotating shaft 20 is provided at the lower end of the lifting push rod 2, with a lifting roller 18 and a guide roller I 19 connected to each end of the shaft 20. A guide frame 6 is fixed to each side of the base 1. The two lifting rollers 18 engage with the variable-angle inclined surfaces 5.1 on the two upright plates 5.2, and the two guide rollers I 19 engage with the two guide frames 6. In this embodiment, the two guide frames 6 are tilted forward.

[0030] To ensure reliable movement of the push frame 5, in this embodiment, two horizontal moving guide rails 16 are provided inside the base 1, and guide rollers II 17 are respectively provided on both sides of the lower part of the push frame 5 to cooperate with the two horizontal moving guide rails 16. The push frame 5 can move along the horizontal moving guide rails 16 through the guide rollers II 17.

[0031] The working principle of this utility model is as follows: When the lifting beam 3 needs to be lifted, the motor and reducer 14 drive the chain transmission mechanism to operate. When the chain 12 is driven, it drives the rolling frame 10 to push the push rod 9, the connecting frame 7, and the push frame 5 forward together. When the push frame 5 moves forward, it lifts the lifting push rod 2 upward. While the push frame 5 is moving forward and lifting the lifting push rod 2 upward, it also moves forward along the guide frame 10, thereby pushing the lifting beam 3 to rotate around the swing shaft 15 and lift the front end, thus realizing the lifting function. When the chain transmission mechanism operates in the reverse direction, the lifting beam 3 descends.

[0032] The lifting mechanism adopted in this invention provides stable and reliable lifting of the lifting beam with a fast lifting speed, which can meet the needs of applications with high speed requirements. Moreover, the lifting mechanism is electrically driven and does not pollute the environment. It can effectively solve the problem of hydraulic oil leakage and environmental pollution in existing hydraulically driven lifting machines. It can be widely used in oil well repair operations to replace existing hydraulically driven lifting conveyors.

[0033] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A tubing lifting conveyor, comprising a base, a lifting beam, and a lifting mechanism, wherein one end of the lifting beam is hingedly connected to one end of the base, characterized in that: The lifting mechanism includes a lifting push rod, a pushing frame, a connecting frame, and a drive mechanism. The upper end of the lifting push rod is hinged to the lifting beam, and the lower end of the lifting push rod is connected to a lifting roller and a guide roller I. The pushing frame is movably installed in the base. The upper part of the pushing frame has a variable-angle inclined plane formed by multiple inclined planes with different slopes. The slope of each inclined plane gradually increases from bottom to top. The lower end of the lifting push rod is movably engaged with the variable-angle inclined plane on the upper part of the pushing frame through its lifting roller. The guide roller I at the lower end of the lifting push rod is movably engaged with the guide frame fixed to the side of the base. The drive mechanism is installed in the base and includes a push-pull rod, a motor and reducer fixed to the base, and a chain drive mechanism. One end of the push-pull rod is connected to the chain of the chain drive mechanism, and the other end of the push-pull rod is hinged to the connecting frame fixed to one end of the pushing frame.

2. The tubing lifting conveyor according to claim 1, characterized in that: The variable-angle inclined plane consists of four inclined planes with different slopes.

3. The tubing lifting conveyor according to claim 2, characterized in that: The chain drive mechanism has a rolling frame with rollers connected to the chain, and one end of the push-pull rod is hinged to the rolling frame.

4. The tubing lifting conveyor according to claim 2, characterized in that: The push frame is a frame structure, which includes two parallel upright plates that are fixed together by a support plate. The upper surface of both upright plates has the variable angle inclined surface. The lower end of the lifting push rod is connected to two lifting rollers and two guide rollers I through a rotating shaft. A guide frame is fixed on each side of the base. The two lifting rollers cooperate with the variable angle inclined surface of the two upright plates respectively, and the two guide rollers I cooperate with the two guide frames respectively.

5. The tubing lifting conveyor according to claim 2, characterized in that: The guide frame is tilted.

6. The tubing lifting conveyor according to claim 1, 2, 3, 4, or 5, characterized in that: The base is equipped with a horizontal moving guide rail, and the lower part of the push frame is equipped with guide roller II that cooperates with the horizontal moving guide rail.

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