A beam-pumping unit front balance and accident protection device

Abstract

The application discloses a beam-type pumping unit front balance and accident protection device, and relates to the field of pumping units, which comprises a support, a beam, a hydraulic cylinder, a balance energy accumulator and a high-pressure hose, the beam is movably hinged at the top end of the support, one end of the hydraulic cylinder is hingedly connected with the forearm of the beam, the other end of the hydraulic cylinder is hingedly connected with the middle upper part of the support, the end of the hydraulic cylinder close to the support is provided with a self-locking valve, the balance energy accumulator is connected to the support and located on the side away from the hydraulic cylinder, and the balance energy accumulator and the self-locking valve are connected together through the high-pressure hose. The application solves the problem of poor torque balance of the four-link mechanism of the beam-type pumping unit, reduces the current peak value of the motor, saves the energy of crude oil exploitation, realizes the effect of secondary self-locking protection of the beam-type pumping unit during shutdown, avoids the safety risk of manual locking brake failure, and effectively improves the safety performance of the pumping unit.

Description

Technical Field

[0001] This invention relates to the field of oil pumping units, and more particularly to a front-mounted balancing and accident protection device for a beam pumping unit. Background Technology

[0002] A beam pumping unit is a specialized oilfield device that converts the rotary motion of an electric motor into reciprocating variable-acceleration motion using a four-bar linkage. This equipment, along with a sucker rod and pump, lifts crude oil from the formation to the surface. The suspension point loads of a conventional beam pumping unit include: sucker rod gravity, liquid column gravity, vibration, inertial load, and kinetic friction load. During the reciprocating motion, load imbalances can occur. Although crank balancing, beam balancing, and combined balancing mechanisms are used to balance some of the electric motor drive torque and reduce the unit fluid consumption of the well, the limitations of the four-bar linkage mechanism mean that the load and torque are at their maximum when the sucker rod descends to the bottom dead center and reverses upwards. However, the crank balancing and beam balancing mechanisms achieve the minimum balancing torque at this point. This results in high electric motor power, high maximum operating current, and persistently high power consumption during crude oil extraction.

[0003] Secondly, after a beam pumping unit is shut down, the crank is typically positioned and the sucker rod is kept stationary by manually locking the brake hub with the manual brake to ensure personnel safety during maintenance and repair. However, if the manual brake malfunctions, becomes loose, or fails during maintenance, the pumping unit crank and other components will rotate under gravity, posing a significant risk of injury to on-site maintenance and operating personnel.

[0004] Therefore, how to develop a pre-balance and accident protection device for a beam pumping unit to solve the problem of torque imbalance in the four-bar linkage mechanism of the beam pumping unit, reduce the peak current of the motor, and save energy in crude oil extraction; at the same time, to achieve the effect of secondary self-locking protection when the beam pumping unit stops, avoid the safety risk of manual locking brake failure, and effectively improve the safety performance of the pumping unit, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a pre-balance and accident protection device for a beam pumping unit, which solves the problem of torque imbalance in the four-bar linkage mechanism of the beam pumping unit, reduces the peak current of the motor, and saves energy in crude oil extraction; at the same time, it achieves the effect of secondary self-locking protection when the beam pumping unit stops, avoids the safety risk of manual locking brake failure, and effectively improves the safety performance of the pumping unit.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention discloses a front-mounted balancing and accident protection device for a beam pumping unit, comprising a support, a beam, a hydraulic cylinder, a balancing accumulator, and a high-pressure hose. The beam is hinged to the top of the support. One end of the hydraulic cylinder is hinged to the forearm of the beam, and the other end is hinged to the upper middle part of the support. A self-locking valve is provided at the end of the hydraulic cylinder near the support. The balancing accumulator is connected to the support and located on the side away from the hydraulic cylinder. The balancing accumulator and the self-locking valve are connected together via the high-pressure hose.

[0008] Preferably, the hydraulic cylinder includes a telescopic rod and a hydraulic cylinder body. The telescopic rod is connected to the forearm of the walking beam by a fixing clip, and the telescopic rod is hinged to the fixing clip. The hydraulic cylinder body is connected to one side of the bracket by the fixing clip, and the hydraulic cylinder body is hinged to the fixing clip. The self-locking valve is installed at one end of the hydraulic cylinder body near the bracket.

[0009] Preferably, the fixing clip includes a first upper fixing plate, a first lower fixing plate, a hinge seat, and a first bolt. The hinge seat is welded to the first upper fixing plate. Both the first upper fixing plate and the first lower fixing plate are provided with two first position adjustment holes. The first bolt passes through the first position adjustment holes to fasten the first upper fixing plate and the first lower fixing plate together. The telescopic rod and the hydraulic cylinder body are both hinged to the hinge seat.

[0010] Preferably, the energy storage device includes an energy storage device housing, an airbag fixing cap, an inflation valve, an airbag, and a hydraulic nozzle assembly. The bottom end of the energy storage device housing is threadedly connected to the upper part of the hydraulic nozzle assembly. The inflation valve is connected to the airbag assembly and then connected to the top of the energy storage device housing through the airbag fixing cap.

[0011] Preferably, the hydraulic nozzle assembly includes a hydraulic nozzle assembly housing, a spring, and a lift valve. The upper part of the hydraulic nozzle assembly housing is connected to the bottom of the balance accumulator housing via threads. The spring and the lift valve are assembled together and movably connected through the inner cavity of the hydraulic nozzle assembly housing. The two ends of the spring abut against the lift valve and the hydraulic nozzle assembly housing, respectively. A pressure gauge is provided in the lower middle part of the hydraulic nozzle assembly housing.

[0012] Preferably, quick-connect couplings are connected to both ends of the high-pressure hose, and the quick-connect couplings are respectively threaded to the lower part of the housing of the self-locking valve and the hydraulic nozzle assembly.

[0013] Preferably, the balancing energy storage device is strapped to the bracket by energy storage device clips, and the bottom end of the balancing energy storage device is placed directly on the support base, which is fixedly connected to the bracket.

[0014] Preferably, the support base includes a second upper fixing plate, a second lower fixing plate, a support frame, and a second bolt. The support frame is welded to the second upper fixing plate. Both the second upper fixing plate and the second lower fixing plate are provided with two second position adjustment holes. The second bolt passes through the second position adjustment holes to fasten the second upper fixing plate and the second lower fixing plate together. The bottom end of the balanced energy storage device is in contact with one side of the support frame.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] This invention discloses a front-mounted balancing and accident protection device for a beam pumping unit, comprising a support, a beam, a hydraulic cylinder, a balancing accumulator, and a high-pressure hose. The beam is movably hinged to the top of the support. One end of the hydraulic cylinder is hinged to the forearm of the beam via a fixing clip, and the other end of the hydraulic cylinder is hinged to the upper middle part of the support via a fixing clip. A self-locking valve is provided at the end of the hydraulic cylinder near the support. The balancing accumulator is connected to the support and located on the side away from the hydraulic cylinder. The balancing accumulator and the self-locking valve are connected together via the high-pressure hose.

[0017] 1) The self-locking valve is designed to lock the relative movement of the walking beam and the support by closing the self-locking valve. This provides secondary self-locking protection for the walking beam pumping unit when it stops, based on the manual braking and brake hub locking. This avoids the safety risk of manual braking failure, effectively improves the safety performance of the pumping unit, and protects the lives of the staff.

[0018] 2) The hydraulic cylinder and the balance accumulator are designed to convert gravitational potential energy into pressure potential energy and to store and release pressure potential energy. The two work together to effectively solve the problem of torque imbalance in the four-bar linkage of the beam pumping unit, reduce the peak current of the motor, and save energy in crude oil extraction.

[0019] 3) The fixing clip is equipped with a first position adjustment hole and a first bolt that can adjust the installation position and installation distance, so as to realize the installation of the hydraulic cylinder on any walking beam and bracket, and improve the convenience of the lifting device;

[0020] 4) The pressure gauge is set to facilitate the detection of the maximum pressure value when the energy storage device is working, so that users can adjust the amount of gas in the air bladder in a timely manner according to the pressure gauge reading, and ensure the safe operation of the energy storage device.

[0021] In summary, this invention provides a pre-balance and accident protection device for a beam pumping unit, which solves the problem of torque imbalance in the four-bar linkage mechanism of the beam pumping unit, reduces the peak current of the motor, and saves energy in crude oil extraction. At the same time, it achieves the effect of secondary self-locking protection when the beam pumping unit stops, avoids the safety risk of manual locking brake failure, and effectively improves the safety performance of the pumping unit. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of a beam pumping unit front-end balancing and accident protection device according to the present invention;

[0024] Figure 2 This is a schematic diagram of the fixing card structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the support base structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the balanced energy storage device structure of the present invention;

[0027] Figure 5 This is a cross-sectional view of the balanced energy storage device of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Walking beam; 3. Hydraulic cylinder; 31. Telescopic rod; 32. Hydraulic cylinder body; 4. Balance accumulator; 41. Balance accumulator housing; 42. Airbag fixing cap; 43. Inflation valve; 44. Airbag; 45. Hydraulic nozzle assembly; 451. Hydraulic nozzle assembly housing; 452. Spring; 453. Lifting valve; 5. High-pressure hose; 6. Self-locking valve; 7. Fixing clip; 71. First fixing plate; 72. Second fixing plate; 73. Hinge seat; 74. First bolt; 75. First position adjustment hole; 8. Pressure gauge; 9. Accumulator clip; 10. Support base; 101. Second upper fixing plate; 102. Second lower fixing plate; 103. Support frame; 104. Second bolt; 105. Second position adjustment hole. Detailed Implementation

[0029] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] like Figure 1-5As shown, a pre-positioned balancing and accident protection device for a beam pumping unit includes a support 1, a walking beam 2, a hydraulic cylinder 3, a balancing energy storage device 4, and a high-pressure hose 5. The walking beam 2 is hinged to the top of the support 1. One end of the hydraulic cylinder 3 is hinged to the forearm of the walking beam 2, and the other end is hinged to the upper middle part of the support 1. A self-locking valve 6 is provided at the end of the hydraulic cylinder 3 near the support 1. The balancing energy storage device 4 is connected to the support 1 and located on the side away from the hydraulic cylinder 3. The balancing energy storage device 4 and the self-locking valve 6 are connected together through the high-pressure hose 5. Specifically, the hydraulic cylinder realizes the mutual conversion of gravitational potential energy and pressure potential energy, and the balancing energy storage device realizes the storage and release of pressure potential energy. The two work together to effectively solve the problem of torque imbalance in the four-bar linkage mechanism of the beam pumping unit, reduce the peak current of the motor, and save energy in crude oil extraction.

[0031] Specifically, the hydraulic cylinder 3 includes a telescopic rod 31 and a cylinder body 32. The telescopic rod 31 is connected to the forearm of the walking beam 2 via a fixing clip 7, and the telescopic rod 31 is hinged to the fixing clip 7. The cylinder body 32 is connected to one side of the support 1 via the fixing clip 7, and the cylinder body 32 is hinged to the fixing clip 7. The self-locking valve 6 is installed at one end of the hydraulic cylinder body 32 near the support 1. Specifically, by closing the self-locking valve to lock the relative movement of the walking beam and the support, a secondary self-locking protection is achieved for stopping the walking beam pumping unit, based on the manual braking and brake hub locking. This avoids the safety risk of manual brake failure, effectively improves the safety performance of the pumping unit, and protects the lives of the workers.

[0032] Specifically, the fixing clip 7 includes a first upper fixing plate 71, a first lower fixing plate 72, a hinge seat 73, and a first bolt 74. The hinge seat 73 is welded to the first upper fixing plate 71. Both the first upper fixing plate 71 and the first lower fixing plate 72 are provided with two first position adjustment holes 75. The first bolt 74 passes through the first position adjustment holes 75 to fasten the first upper fixing plate 71 and the first lower fixing plate 72 together. The telescopic rod 31 and the hydraulic cylinder body 32 are both hinged to the hinge seat 73. Specifically, by adjusting the position of the first bolt in the first position adjustment hole, the fixing clip can be fastened to brackets and walking beams of different sizes and specifications, realizing the installation of the hydraulic cylinder on any walking beam and bracket, improving the convenience of the device.

[0033] Specifically, the energy storage device 4 includes an energy storage device housing 41, an airbag fixing cap 42, an inflation valve 43, an airbag 44, and a hydraulic nozzle assembly 45. The bottom end of the energy storage device housing 41 is threadedly connected to the upper part of the hydraulic nozzle assembly 45. The inflation valve 43 is combined with the airbag 44 and then connected to the top of the energy storage device housing 41 through the airbag fixing cap 42.

[0034] Specifically, the hydraulic nozzle assembly 45 includes a hydraulic nozzle assembly housing 451, a spring 452, and a lift valve 453. The upper part of the hydraulic nozzle assembly housing 451 is threaded to the bottom of the balance energy storage housing 41. The spring 452 and the lift valve 453 are assembled together and movably connected through the inner cavity of the hydraulic nozzle assembly housing 451. The two ends of the spring 452 abut against the lift valve 453 and the hydraulic nozzle assembly housing 451, respectively. A pressure gauge 8 is provided in the lower middle part of the hydraulic nozzle assembly housing 451. Specifically, the pressure gauge can detect the maximum pressure value when the balance energy storage device is working, allowing the user to adjust the amount of gas in the air bladder in a timely manner according to the pressure gauge reading, ensuring the safe operation of the balance energy storage device.

[0035] Specifically, quick-connect couplings are attached to both ends of the high-pressure hose 5, and these quick-connect couplings are threadedly connected to the self-locking valve 6 and the lower part of the hydraulic nozzle assembly housing 451, respectively. Specifically, the high-pressure hose is connected to both the self-locking valve and the hydraulic nozzle assembly housing using external threads.

[0036] Specifically, the balancing energy storage device 4 is secured to the bracket 1 by energy storage device clips 9, and the bottom end of the balancing energy storage device 4 rests directly on the support base 10, which is fixedly connected to the bracket 1. Specifically, the energy storage device clips can be mechanical clamps, steel wires, or other connecting components.

[0037] Specifically, the support base 10 includes a second upper fixing plate 101, a second lower fixing plate 102, a support frame 103, and a second bolt 104. The support frame 103 is welded to the second upper fixing plate 101. Both the second upper fixing plate 101 and the second lower fixing plate 102 are provided with two second position adjustment holes 105. The second bolt 104 passes through the second position adjustment holes 105 to securely connect the second upper fixing plate 101 and the second lower fixing plate 102 together. The bottom end of the balanced energy storage device 4 is in contact with one side of the support frame 103. Specifically, by adjusting the position of the second bolt within the second position adjustment holes, the support base can be installed on brackets of different sizes and specifications.

[0038] The usage process of this invention is as follows:

[0039] First, the forearm of the walking beam moves downward, and the telescopic rod is pushed into the hydraulic cylinder body by the weight of the walking beam itself. The hydraulic oil in the hydraulic cylinder body enters the inner cavity of the balance energy storage device housing through the self-locking valve, high-pressure hose, and hydraulic nozzle assembly. The pressure in the inner cavity of the balance energy storage device housing increases and squeezes the air bladder. The air bladder shrinks in volume while storing pressure energy. Then, the forearm of the walking beam moves upward, the air bladder expands and releases pressure energy. The hydraulic oil in the inner cavity of the balance energy storage device housing enters the hydraulic cylinder body through the hydraulic nozzle assembly, high-pressure hose, and self-locking valve. The telescopic rod pushes the walking beam upward under the action of the hydraulic oil pressure energy, realizing torque balance, effectively reducing the peak current of the motor, and saving energy in crude oil extraction.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A pre-positioned balancing and accident protection device for a beam pumping unit, characterized in that: The device includes a support (1), a walking beam (2), a hydraulic cylinder (3), a balance accumulator (4), and a high-pressure hose (5). The walking beam (2) is hinged to the top of the support (1). One end of the hydraulic cylinder (3) is hinged to the forearm of the walking beam (2), and the other end of the hydraulic cylinder (3) is hinged to the upper middle part of the support (1). A self-locking valve (6) is provided at one end of the hydraulic cylinder (3) near the support (1). The balance accumulator (4) is connected to the support (1) and located on the side away from the hydraulic cylinder (3). The balance accumulator (4) and the self-locking valve (6) are connected together through the high-pressure hose (5). The hydraulic cylinder (3) includes a telescopic rod (31) and a hydraulic cylinder body (32). The telescopic rod (31) is connected to the forearm of the walking beam (2) by a fixing clip (7), and the telescopic rod (31) is hinged to the fixing clip (7). The hydraulic cylinder body (32) is connected to one side of the bracket (1) by the fixing clip (7), and the hydraulic cylinder body (32) is hinged to the fixing clip (7). The self-locking valve (6) is installed at one end of the hydraulic cylinder body (32) near the bracket (1). The fixing clip (7) includes a first upper fixing plate (71), a first lower fixing plate (72), a hinge seat (73), and a first bolt (74). The hinge seat (73) is welded to the first upper fixing plate (71). Both the first upper fixing plate (71) and the first lower fixing plate (72) are provided with two first position adjustment holes (75). The first bolt (74) passes through the first position adjustment holes (75) to fasten the first upper fixing plate (71) and the first lower fixing plate (72) together. The telescopic rod (31) and the hydraulic cylinder body (32) are both hinged to the hinge seat (73). The balanced energy storage device (4) is tied to the bracket (1) by the energy storage device clip (9). The bottom end of the balanced energy storage device (4) is placed directly on the support base (10) which plays a supporting role. The support base (10) is fixedly connected to the bracket (1). The support base (10) includes a second upper fixing plate (101), a second lower fixing plate (102), a support frame (103), and a second bolt (104). The support frame (103) is welded to the second upper fixing plate (101). Both the second upper fixing plate (101) and the second lower fixing plate (102) are provided with two second position adjustment holes (105). The second bolt (104) passes through the second position adjustment holes (105) to fasten the second upper fixing plate (101) and the second lower fixing plate (102) together. The bottom end of the balance energy storage device (4) is in contact with one side of the support frame (103). The hydraulic cylinder (3) realizes the mutual conversion of gravitational potential energy and pressure potential energy, and the balance energy storage device (4) realizes the storage and release of pressure potential energy. The two work together to effectively solve the problem of torque balance difference in the four-bar linkage mechanism of the walking beam pumping unit.

2. The pre-balance and accident protection device for a beam pumping unit according to claim 1, characterized in that: The energy storage device (4) includes an energy storage device housing (41), an airbag fixing cap (42), an inflation valve (43), an airbag (44), and a hydraulic nozzle assembly (45). The bottom end of the energy storage device housing (41) is threadedly connected to the upper part of the hydraulic nozzle assembly (45). After the inflation valve (43) and the airbag (44) are combined and connected together, they are connected to the top of the energy storage device housing (41) through the airbag fixing cap (42).

3. The beam pumping unit pre-balancing and accident protection device according to claim 2, characterized in that: The hydraulic nozzle assembly (45) includes a hydraulic nozzle assembly housing (451), a spring (452), and a lift valve (453). The upper part of the hydraulic nozzle assembly housing (451) is connected to the bottom of the balance accumulator housing (41) by threads. The spring (452) and the lift valve (453) are assembled together and movably connected through the inner cavity of the hydraulic nozzle assembly housing (451). The two ends of the spring (452) abut against the lift valve (453) and the hydraulic nozzle assembly housing (451) respectively. A pressure gauge (8) is provided in the lower middle part of the hydraulic nozzle assembly housing (451).

4. The beam pumping unit pre-balancing and accident protection device according to claim 3, characterized in that: The high-pressure hose (5) is connected to quick connectors at both ends, and the quick connectors are threaded to the self-locking valve (6) and the lower part of the hydraulic nozzle assembly housing (451), respectively.

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