Walking beam type automatic leveling pumping unit

Abstract

The utility model provides a walking beam type automatic leveling pumping unit which comprises a walking beam, a balance box and a horse head are arranged at the two ends of the walking beam respectively, the walking beam type automatic leveling pumping unit further comprises an automatic balance adjusting structure, the automatic balance adjusting structure comprises a movable balance weight and an electric control cabinet, the movable balance weight is connected with a distance adjusting device, and the distance adjusting device is installed on the walking beam. The movable balancing weight is sleeved on the walking beam and can reciprocate along the walking beam; the distance adjusting device is in electric signal connection with the electric control cabinet, and the electric control cabinet is used for judging whether the pumping unit is balanced or not and transmitting a signal to the distance adjusting device to drive the movable balancing weight to move along the walking beam when the pumping unit is unbalanced. Whether the oil pumping unit is balanced or not is judged through the electric control cabinet, the distance adjusting device is adopted to adjust the position of the movable balance weight on the walking beam, and the balance of the oil pumping unit is automatically adjusted. Manual intervention is not needed in the leveling process, the labor intensity of front-line workers is reduced, the balance rate of the oil pumping unit is improved, production accidents caused by the unreasonable balance degree of the oil pumping unit are avoided, and meanwhile the efficiency of a mechanical extraction system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum mechanical equipment, and in particular relates to a beam-type automatic leveling oil pumping unit. Background Art

[0002] There are three main ways to produce oil: self-flowing, gas lift and artificial lift. Among the artificial lift methods, mechanical oil production is currently the main method, and beam pumping oil production is the most important method in mechanical oil production. The beam pumping system has the advantages of high reliability, simple structure, and low maintenance cost. Whether at home or abroad, beam pumping oil production occupies a dominant position, accounting for more than 80% of the total number of oil wells.

[0003] The balance of the pumping unit refers to the ratio of the maximum current during the downstroke to the maximum current during the upstroke during the normal operation of the pumping unit. It is generally considered reasonable when it is between 80% and 100%. The balance of the pumping unit directly affects the load size and service life of the motor, as well as the stability of the whole machine operation and the life of the connecting rod, crank, bearing and other parts. In severe cases, it may even cause the pumping unit to roll over. In addition, improving the balance of the pumping unit affects the efficiency of the machine extraction system. Insufficient balance or overbalance will increase the power consumption of the pumping unit.

[0004] At present, most of the methods are manually measured with a clamp ammeter to measure the peak current of the up and down strokes of the pumping unit, determine the balance state, and then stop the unit to move the crank balance block position or increase or decrease the number of balance blocks to adjust the balance of the pumping unit. Manually adjusting the balance of the pumping unit is labor-intensive and sometimes requires the cooperation of a crane, which is costly.

[0005] The invention patent with the patent number of 201710233158.7 and the patent name of "Automatic Balancing System and Method for Pumping Unit" discloses an automatic balancing system including a power detection module, a balance calculation module and an adjustment module. The power detection module is used to automatically detect the upstroke electric power and the downstroke electric power during the operation of the pumping unit, the balance calculation module is used to calculate the balance, the adjustment module is used to adjust the balance of the pumping unit and the system is automatically controlled to form a real-time closed-loop automatic adjustment of the balance of the pumping unit, so as to improve the efficiency of the pumping system, save energy and electricity, and extend the life of the pumping unit. At the same time, it saves the labor intensity of the balance adjustment of the pumping unit and improves the work efficiency. However, the problem is that when the pumping unit is installed and used in the field, the gear track connecting the balance box and the walking beam is easily stuck due to wind, sand, rain, snow, rust, etc. And self-locking cannot be achieved. Utility Model Content

[0006] The utility model aims to provide a beam type automatic leveling oil pumping unit to overcome the above technical problems existing in the prior art.

[0007] To this end, the technical solution provided by the utility model is as follows:

[0008] A walking beam type automatic leveling oil pumping unit, comprising a walking beam, one end of the walking beam is a balance box, the other end of the walking beam is a donkey head, and also comprises an automatic balancing structure, the automatic balancing structure comprises a mobile balancing weight and an electric control cabinet, the mobile balancing weight is connected to a distance adjustment device, the distance adjustment device is installed on the walking beam, the mobile balancing weight is sleeved on the walking beam and can reciprocate along the walking beam;

[0009] The distance adjustment device is connected to the electric control cabinet by electrical signals. The electric control cabinet is used to determine whether the oil pump is balanced. When it is unbalanced, a signal is transmitted to the distance adjustment device to drive the mobile balance weight to move along the walking beam.

[0010] The distance adjustment device includes a screw rod 1, a motor 1 and a nut 1, wherein one end of the screw rod 1 is connected to the output end of the motor 1, the nut 1 is threadedly connected to the screw rod 1, the nut 1 is fixedly connected to the mobile counterweight, and the motor 1 is connected to the electrical control cabinet electrical signal.

[0011] The distance adjustment device includes a second screw, a worm gear reducer, a second motor and a second nut. The output shaft of the second motor is connected to the worm gear reducer, the second screw and the second nut are threadedly connected, the worm gear reducer is fixedly connected to the second nut, and the second screw is fixedly connected to the movable balance weight.

[0012] The electric control cabinet comprises an RTU remote terminal unit and a three-phase electric power meter, and the three-phase electric power meter communicates with the RTU remote terminal unit through an interface.

[0013] The second screw rod is provided with a screw rod protection sleeve.

[0014] The second lead screw and the movable balance weight are connected via a flange.

[0015] The beneficial effects of the utility model are:

[0016] The walking beam type automatic leveling oil pumping unit provided by the present invention determines whether the oil pumping unit is balanced through the electric control cabinet, and uses the distance adjustment device to adjust the position of the mobile balance weight on the walking beam, so as to realize automatic adjustment of the balance of the oil pumping unit. The leveling process does not require manual intervention, reduces the labor intensity of front-line workers, improves the balance rate of the oil pumping unit, avoids production accidents caused by unreasonable balance of the oil pumping unit, and improves the efficiency of the machine extraction system.

[0017] The beam-type automatic leveling pumping unit achieves precise adjustment of the position of the mobile counterweight on the beam through the combination of a screw rod, a nut and a motor. The transmission is self-locking and can maintain a stable position without external interference. A screw rod protective cover is provided outside the screw rod to prevent sand from entering and improve the reliability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an implementation method of the utility model.

[0019] In the figure: 1. chassis; 2. electric motor or diesel engine; 3. electric control cabinet; 4. reducer; 5. crank; 6. connecting rod; 7. crossbeam; 8. mobile counterweight; 9. balance box; 10. flange 10; 11. distance adjustment device 11; 12. screw rod protection cover; 13. walking beam; 14. donkey head; 15. bracket; 16. rope suspension device. DETAILED DESCRIPTION

[0020] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0021] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0022] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0023] Example 1

[0024] This embodiment provides a beam type automatic leveling oil pumping unit, including a beam, one end of the beam is a balance box, the other end of the beam is a donkey head, and also includes an automatic balancing structure, the automatic balancing structure includes a mobile balancing weight 8 and an electric control cabinet 3, the mobile balancing weight 8 is connected to a distance adjustment device 11, the distance adjustment device 11 is installed on the beam, the mobile balancing weight 8 is sleeved on the beam and can reciprocate along the beam;

[0025] The distance adjustment device 11 is connected to the electric control cabinet 3 by electrical signals. The electric control cabinet 3 is used to determine whether the pumping unit is balanced. When it is unbalanced, a signal is transmitted to the distance adjustment device 11 to drive the mobile balance weight 8 to move along the walking beam.

[0026] The existing beam pumping unit includes a chassis 1, an electric motor or a diesel engine 2, a brake mechanism, a reducer 4, a crank 5, a connecting rod 6, a balance box 9, a beam 13, a cross beam 7, a beam support, a donkey head 14, a rope hanger 16, a bracket and other 15 parts, which belong to the prior art and will not be described in detail. The difference between this embodiment and the existing beam pumping unit is that it also includes an automatic balancing structure.

[0027] The walking beam type automatic leveling oil pumping unit provided by the present invention determines whether the oil pumping unit is balanced through the electric control cabinet 3, and uses the distance adjustment device 11 to adjust the position of the movable balance weight 8 on the walking beam, so as to realize automatic adjustment of the balance of the oil pumping unit. The leveling process does not require manual intervention, reduces the labor intensity of front-line workers, improves the balance rate of the oil pumping unit, avoids production accidents caused by unreasonable balance of the oil pumping unit, and improves the efficiency of the machine mining system.

[0028] Example 2

[0029] On the basis of Example 1, this embodiment provides a walking beam type automatic leveling oil pumping unit, wherein the distance adjustment device 11 comprises a screw rod 1, a motor 1 and a nut 1, wherein one end of the screw rod 1 is connected to the output end of the motor 1, the nut 1 is threadedly connected to the screw rod 1, the nut 1 is fixedly connected to the movable balancing weight 8, and the motor 1 is electrically connected to the electric control cabinet 3.

[0030] Adjustment process:

[0031] When the pumping unit is unbalanced, the electric control cabinet 3 sends a signal to the motor 1, and the motor 1 rotates to drive the screw 1 to rotate, so that the nut 1 drives the moving balance weight 8 to move linearly along the walking beam. During the movement, the electric control cabinet 3 calculates in real time whether the pumping unit is balanced. When it is balanced, the electric control cabinet 3 sends a signal to stop the motor 1.

[0032] The electric control cabinet 3 calculates whether the pumping unit is balanced in real time, which belongs to the prior art, see patent CN108691756A, by using the power method through the pumping unit balance software calculation module to dynamically calculate the balance degree of the pumping unit, balance degree = P 上 / P 下 (P 上 P is the maximum power of the pumping unit during the up and down strokes. 下 is the smaller power of the up and down strokes of the pump).

[0033] In this embodiment, the precise adjustment of the position of the movable counterweight 8 on the walking beam is achieved through the cooperation of the screw rod, the nut and the motor. The transmission has a self-locking property and can maintain a stable position without being disturbed by the outside.

[0034] Example 3

[0035] Based on Example 1, this embodiment provides a beam type automatic leveling oil pumping unit, such as Figure 1As shown, the distance adjustment device 11 includes a second screw, a worm gear reducer, a second motor and a second nut. The output shaft of the second motor is connected to the worm gear reducer, the second screw and the second nut are threadedly connected, the worm gear reducer is fixedly connected to the second nut, and the second screw is fixedly connected to the movable balance weight 8.

[0036] Adjustment process:

[0037] When the pumping unit is unbalanced, the electric control cabinet 3 sends a signal to the motor 2, the motor 2 rotates to drive the worm gear reducer to rotate, the worm gear reducer rotates the nut 2, so that the screw 2 moves linearly, pushing or pulling the moving balance weight 8 to move linearly along the walking beam. During the movement process, the electric control cabinet 3 calculates in real time whether the pumping unit is balanced. When it is balanced, the electric control cabinet 3 sends a signal to stop the motor 2.

[0038] The threads of screw rod 2 and nut 2 interact with each other, so that the mobile balance weight 8 moves left and right along the direction of screw rod 2. Since the pitch of screw rod 2 and nut 2 is the same, the position of the mobile balance weight 8 moves a pitch distance for each rotation. The movement direction of the mobile balance weight 8 is controlled by changing the rotation direction of motor 2. When motor 2 rotates clockwise, the mobile balance weight 8 moves to the left; when motor 2 rotates counterclockwise, the mobile balance weight 8 moves to the right. While controlling the rotation speed and direction of motor 2, the mobile balance weight 8 can be moved accurately, with a self-locking function.

[0039] Example 4

[0040] On the basis of Example 1, this embodiment provides a beam type automatic leveling oil pumping unit, wherein the electric control cabinet 3 includes an RTU remote terminal unit and a three-phase electric power meter, and the three-phase electric power meter communicates with the RTU remote terminal unit through an interface.

[0041] The RTU can automatically calculate whether the pump is balanced based on the power consumed by the pump in the up and down strokes. When the RTU reads the power consumed by the pump in the up stroke in the three-phase power meter, 上 , the power consumed in the downstroke W 下 ,when When the pumping unit is not balanced enough, the RTU will output a signal to control the motor of the distance adjustment device to reverse, pushing the adjustable balance weight to move a certain distance behind the walking beam. Similarly, when the balance of the pump is too large, the RTU will output a signal to control the motor of the distance adjustment device to rotate forward, pushing the movable counterweight 8 to move a certain distance in front of the walking beam (near the donkey head). The RTU will automatically calculate whether the pump is balanced based on the power consumed by the pump in the up and down strokes, and push the adjustable counterweight forward or backward again until the balance of the pump meets the requirements.

[0042] Example 5

[0043] On the basis of Example 3, this embodiment provides a beam type automatic leveling oil pumping unit, wherein a screw rod protective sleeve 12 is provided outside the screw rod.

[0044] A screw protection cover 12 is arranged outside the screw rod 2 to prevent wind and sand from entering, thereby improving the reliability of operation.

[0045] Example 6

[0046] On the basis of Example 3, this embodiment provides a beam-type automatic leveling oil pumping unit, in which the lead screw 2 and the movable balance weight 8 are connected via a flange 10 .

[0047] The flange 10 is used for tight connection, easy disassembly, high fit and strong adaptability.

[0048] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A beam type automatic leveling oil pumping unit, comprising a beam, one end of the beam being a balance box, and the other end of the beam being a donkey head, characterized in that: It also includes an automatic balancing structure, which includes a mobile balancing weight and an electric control cabinet, the mobile balancing weight is connected to a distance adjustment device, the distance adjustment device is installed on the walking beam, and the mobile balancing weight is sleeved on the walking beam and can reciprocate along the walking beam; The distance adjustment device is connected to the electric control cabinet by electrical signals. The electric control cabinet is used to determine whether the oil pump is balanced. When it is unbalanced, a signal is transmitted to the distance adjustment device to drive the mobile balance weight to move along the walking beam.

2. The beam type automatic leveling oil pumping unit according to claim 1, characterized in that: The distance adjustment device includes a screw rod 1, a motor 1 and a nut 1, wherein one end of the screw rod 1 is connected to the output end of the motor 1, the nut 1 is threadedly connected to the screw rod 1, the nut 1 is fixedly connected to the mobile counterweight, and the motor 1 is connected to the electrical control cabinet electrical signal.

3. The beam type automatic leveling oil pumping unit according to claim 1, characterized in that: The distance adjustment device includes a second screw, a worm gear reducer, a second motor and a second nut. The output shaft of the second motor is connected to the worm gear reducer, the second screw and the second nut are threadedly connected, the worm gear reducer is fixedly connected to the second nut, and the second screw is fixedly connected to the movable balance weight.

4. The beam type automatic leveling oil pumping unit according to claim 1, characterized in that: The electric control cabinet comprises an RTU remote terminal unit and a three-phase electric power meter, and the three-phase electric power meter communicates with the RTU remote terminal unit through an interface.

5. The beam type automatic leveling oil pumping unit according to claim 3, characterized in that: The second screw rod is provided with a screw rod protection sleeve.

6. The beam type automatic leveling oil pumping unit according to claim 3, characterized in that: The second screw rod and the movable balance weight are connected via a flange.

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