Manual unloading device and method for beam-pumping unit

Abstract

The invention provides a manual unloading device and method for a beam-pumping unit, and relates to the technical field of auxiliary unloading devices for beam-pumping units. The device comprises a fixing support, a fixing base, an open type speed reducer, a hand-cranking device and a gear ring assembly, the fixing base can be rapidly connected with bases of oil pumping units of multiple specifications, and the gear ring assembly can be rapidly connected with belt wheels of the oil pumping units of multiple specifications; the whole device adopts a mechanical structure to realize convenient single-person operation, the working efficiency is obviously improved, the device is also suitable for unloading operation of beam-pumping units of various specifications, the applicability of the device is improved, and the oil extraction operation cost and the safety risk of an oil field are reduced; the problems that when an existing small-power energy-saving motor drives an oil pumping unit, a crank balance block cannot reach the upper vertex needed by unloading, an automobile crane needs to be used for assisting in unloading, an existing device is large in size and inconvenient to transport, and the existing device is complex in electric control and cannot meet the requirement for safe use under the severe environment are solved.

Description

Technical Field

[0001] This invention relates to the technical field of auxiliary unloading devices for beam pumping units, and particularly to a manual unloading device and method for beam pumping units. Background Technology

[0002] The beam pumping unit is one of the most common mechanical oil production equipment in oilfield operations. It uses an electric motor to drive a pulley, which in turn drives the output shaft of the gearbox and the crank balance block to rotate, ultimately causing the beam pump to move up and down, thereby driving the downhole pump to work.

[0003] During routine maintenance, troubleshooting, or long-term well shutdown, the pumping unit crank balance block needs to be rotated to a specific angle to release the suspension load, i.e., to perform an unloading operation.

[0004] For example, Chinese patent CN111691857B discloses a safe unloading device for a pumping unit, which includes a top drive mechanism and a support mechanism. The support mechanism is installed on the packing box at the pumping unit wellhead, and the top drive mechanism is connected to the support mechanism. The support mechanism supports the top drive mechanism, positioning it directly below the polished rod clamp of the pumping unit; the top drive mechanism applies a linear upward force to the polished rod clamp of the pumping unit to unload the pumping unit load. This device solves the problem that existing pumping unit load unloading requires the use of large equipment such as cranes, resulting in low controllability, safety, and unloading efficiency in the unloading operation.

[0005] However, the unloading device of the aforementioned beam pumping unit has some shortcomings in actual use: 1. Currently, the commonly used unloading methods for pumping units in oilfields mainly include hydraulic unloading devices, electric unloading devices, and traditional manual prying methods. Hydraulic unloading devices offer high unloading efficiency but suffer from complex structures, high costs, and difficult maintenance. In harsh field environments, they are prone to hydraulic leaks and component failures, affecting operational safety. Electric unloading devices rely on external power sources, making them difficult to use when power supply is unavailable in oilfields. Furthermore, their control systems are susceptible to environmental interference, resulting in insufficient reliability. Traditional manual prying methods rely entirely on manual operation, making it impossible to precisely control the crank balance weight angle and ensuring accurate unloading position. Additionally, they lack an effective locking mechanism, making the crank balance weight prone to reverse rotation, posing a significant safety hazard.

[0006] 2. Currently, the general procedure for unloading loads on beam pumping units in oilfields is as follows: start the motor, raise the crank balance block to its highest point (i.e., lower the pumping head to its lowest point), and remove the load. However, in the field of oilfield pumping units, motor energy saving has become an important issue. To reduce operating costs and improve energy efficiency, smaller, more energy-efficient motors are usually selected. However, this practice may result in the crank balance block not reaching its highest point during startup, thus affecting the normal operation of the pumping unit. Therefore, unloading loads requires the assistance of a truck crane, increasing the safety risks during the operation.

[0007] 3. In addition, the existing equipment has poor applicability. Different models of beam pumping units have different base structures, pulley sizes and hole layouts, which makes it impossible for the existing unloading device to be assembled and connected with the existing multi-model pumping units. It can only be connected to a single model of equipment.

[0008] Therefore, based on the above-stated viewpoints, there is still room for improvement in the unloading devices of existing beam pumping units. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a manual unloading device and method for a beam pumping unit, employing the following technical solution: In a first aspect, this application provides a manual unloading device for a beam pumping unit, including a fixed bracket and a fixed seat disposed on one side of the fixed bracket; An open reducer and a hand crank device for controlling the open reducer are provided on the side of the fixed bracket away from the fixed seat. The hand crank device is connected to the open reducer. The gear ring assembly is on the same side as the fixed seat and located above the fixed seat. The gear ring assembly includes a driving gear, a driven gear that controls the pumping unit pulley, and a connecting post on the driven gear that connects to the pumping unit pulley. The driving gear meshes with the driven gear, and several grooves are equally spaced on the driven gear. The connecting column is slidably disposed in the groove.

[0010] Preferably, the connecting column is also provided with a control component for adjusting the spacing between the connecting columns. The control component includes an adjusting turntable rotatably connected to the driven gear, and several arc-shaped grooves are equally spaced on the adjusting turntable.

[0011] Preferably, the connecting column has mounting holes, and extension columns of different diameters or shapes are installed in the mounting holes by screwing.

[0012] Preferably, a linkage adjustment part is provided between the adjusting turntable and the driven gear. The linkage adjustment part includes a toothed groove opened on the driven gear, an adjusting column that meshes with the adjusting turntable, and an adjusting gear installed on the adjusting column. The outer wall of the adjusting turntable has an internal toothed groove that meshes with the adjusting gear. The adjusting gear is controlled by the adjusting column to adjust its position between the toothed groove and the internal toothed groove.

[0013] Preferably, the fixed base includes an I-shaped frame that slides along the height direction of the fixed bracket, an assembly block for assembling the pumping unit base, and an assembly plate. A positioning groove for displacement of the inverted frame is provided on the fixed bracket. The assembly block is slidably disposed in the horizontal moving groove provided on the inverted frame. The end of the assembly block away from the inverted frame is hinged to the assembly plate, and the assembly plate can be opened in one direction. The frame is equipped with a control screw that controls the movement of the two assembly blocks.

[0014] Preferably, the assembly plate has several assembly holes corresponding to the reserved circles on the pumping unit base. After the assembly plate is unfolded and overlapped with the circular holes on the walking beam pumping unit base, it is assembled by bolts and nuts.

[0015] Preferably, the two sets of assembly plates that slide within the C-shaped frame are provided with serrated anti-slip textures on opposite sides for clamping the pumping unit base.

[0016] Preferably, the fixed bracket is also provided with an indicator locking mechanism, which includes a worm that rotates synchronously with the driven gear, a worm wheel that meshes with the worm, and an indicator that makes the crank balance weight visible; The worm gear and the driven gear are connected by a coupling. The worm wheel is located on the top of the open reducer, and an indicator is installed on the top of the worm wheel. A pawl is provided on one side of the worm wheel.

[0017] Preferably, the top of the open reducer is provided with a protective cover to protect the worm gear, and the protective cover is provided with a groove for the indicator to rotate through and a scale mark for the indicator to be visualized.

[0018] Secondly, this application also provides a manual unloading method for a beam pumping unit, as shown below: S1. Positioning and assembly: First, adjust the position of the fixing seat, and then install it on the pumping unit base; S2. Quick docking: The gear ring assembly inserts all connecting posts into the reserved holes on the pumping unit pulley; S3. Manual adjustment: Crank the hand crank device. The hand crank device controls the gear ring assembly through the open reducer to drive the oil pump pulley to work, which drives the crank balance block to rotate; and monitors the crank balance block rotation angle in real time. S4. Precise positioning and locking: When the crank balance weight moves to the designated unloading position, stop cranking the hand crank and lock it to keep the crank balance weight stably in the current position. S5. Locking the brake and unloading: After confirming that the crank balance weight is reliably locked in the designated position, completely lock the dead brake device of the pumping unit, and then the subsequent unloading operation can be safely carried out.

[0019] In summary, this application includes at least one of the following beneficial technical effects: I. This invention, through the cooperation of the fixed base and the gear ring assembly, aims to improve the adaptability to different specifications of beam pumping units, eliminating the need for separately customized unloading equipment for different models and significantly reducing equipment procurement and maintenance costs. The fixed base is compatible with pumping unit bases of different heights and can clamp bases of different widths; the gear ring assembly can be equipped with extension columns of different diameters and shapes to adapt to pumping unit pulleys of different bore diameters and groove types.

[0020] Second, the present invention adopts a mechanical structure to achieve convenient single-person operation and is applicable to unloading operations of various specifications of beam pumping units, thereby improving the applicability of the device and reducing the cost and safety risks of oilfield production operations. It solves the problems that when the existing small-power energy-saving motor drives the pumping unit, the crank balance block cannot reach the upper vertex required for unloading, requiring the assistance of a truck crane for unloading, and the existing device is too large to be transported, and the existing device has complex electrical control that cannot meet the requirements for safe use in harsh environments.

[0021] Third, the indicating and locking mechanism of this invention displays the crank balance weight rotation angle in real time through the cooperation of the indicator and scale markings. Without the need for additional measuring tools, it can accurately determine the unloading position, significantly shortening the overall operation time from equipment installation to unloading completion and improving oilfield production efficiency. Furthermore, it also provides a locking effect, preventing the crank balance weight from rotating in the opposite direction after adjustment. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the structure between the manual unloading device and the walking beam pumping unit of the present invention.

[0024] Figure 2 This is a plan view of the manual unloading device and the walking beam pumping unit of the present invention.

[0025] Figure 3 This is a first-view overall structural schematic diagram of the manual unloading device of the present invention.

[0026] Figure 4 This is a second-view overall structural schematic diagram of the manual unloading device of the present invention.

[0027] Figure 5 This is a schematic diagram of the unfolded structure of the fixing base and assembly plate of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the fixing base and the folding assembly plate of the present invention.

[0029] Figure 7This is a schematic diagram of the structure between the gear ring assembly and the control component of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure between the control component and the linkage adjustment unit of the present invention.

[0031] Figure 9 This is a schematic diagram of the structure between the gear ring assembly, the control component, and the linkage adjustment unit of the present invention.

[0032] Figure 10 This is a schematic diagram of the structure between the connecting column and the extension columns of different specifications of the present invention.

[0033] Figure 11 This is a schematic diagram of the structure of the locking mechanism of the present invention.

[0034] Figure 12 This is a flowchart illustrating the method of using the manual unloading device for the beam pumping unit of the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. Fixed bracket; 2. Fixed seat; 3. Open reducer; 4. Hand crank; 5. Gear ring assembly; 50. Drive gear; 51. Driven gear; 52. Connecting column; 53. Slide groove; 6. Control component; 60. Adjusting turntable; 61. Arc groove; 54. Extension column; 7. Linkage adjustment part; 70. Toothed groove; 71. Adjusting column; 72. Adjusting gear; 73. Internal toothed groove; 20. C-shaped frame; 21. Assembly block; 22. Assembly plate; 23. Positioning groove; 24. Horizontal shifting groove; 25. Control screw; 26. Assembly hole; 8. Indicator locking mechanism; 80. Worm gear; 81. Worm wheel; 82. Indicator; 83. Protective cover; 84. Pawl. Detailed Implementation

[0036] The following combination Figures 1-12 This application will be described in further detail.

[0037] This invention provides a manual unloading device for a beam pumping unit and its method of use. The device aims to achieve stable installation with the pumping unit base and rapid, reliable connection with the pumping unit pulleys through a mechanical structure. Through an open reducer and a self-locking mechanism, it allows a single person to easily, accurately, and safely rotate the pumping unit crank balance block to the unloading position, providing a reliable guarantee for subsequent load unloading.

[0038] Currently, the general operation for unloading beam pumping units in oilfields is as follows: start the motor, raise the crank balance block to its highest point (i.e., lower the pump head to its lowest point), and remove the load. However, with increasing oil production costs and energy conservation becoming a major concern, the beam pumping units currently used in oilfields are one size smaller than conventional models to reduce operating costs. This results in the balance block on one side of the crank balance block not reaching its highest point during startup. Consequently, unloading requires the assistance of an external truck crane, which not only increases costs but also raises safety risks during operation. Therefore, this application provides a manual unloading device for beam pumping units.

[0039] Example 1:

[0040] like Figure 1 and Figure 2 The diagram shows the overall structure of the manual unloading device for a beam pumping unit after assembly with the beam pumping unit. The manual unloading device for a beam pumping unit includes a fixed bracket 1 and a fixed seat 2 located on one side of the fixed bracket 1. An open reducer 3 and a hand crank 4 for controlling the open reducer 3 are located on the side of the fixed bracket 1 away from the fixed seat 2. The hand crank 4 drives the open reducer 3 to control the gear ring assembly 5 on the side of the fixed bracket 1 closest to the fixed seat 2. The hand crank 4 is connected to the open reducer 3, and the gear ring assembly 5 is on the same side as the fixed seat 2 and located above the fixed seat 2.

[0041] Reference Figure 1 As shown in the figure, the walking beam pumping unit, the walking beam pumping unit base, and the walking beam pumping unit pulley are drawn, but they are not labeled.

[0042] The fixed bracket 1 is made of high-strength alloy steel, which has sufficient rigidity and load-bearing capacity to withstand the mechanical loads generated during the installation and unloading of various components, thus avoiding deformation that could affect the operating accuracy of the device.

[0043] The open reducer 3 and the hand crank 4 are located on the side of the fixed bracket 1 away from the fixed base 2. The open reducer 3 is a known existing structure, employing a single or multi-stage cylindrical gear reduction structure. Its input shaft is directly connected to the hand crank 4, while its output shaft drives the gear ring assembly 5. The hand crank 4 is a rocker arm with a comfortable grip. By cranking the rocker arm clockwise or counterclockwise, the operator can output a low-speed, high-torque rotational force after speed conversion and torque amplification by the open reducer 3, controlling the rotation of the gear ring assembly 5.

[0044] Reference Figure 3 , Figure 4 and Figure 5As shown, when unloading an oilfield beam pumping unit, the unloading device must first be connected to the existing oilfield beam pumping unit to ensure the stability of subsequent unloading. Therefore, this application proposes a fixed base 2, which includes an inverted frame 20 that slides along the height direction of the fixed support 1, an assembly block 21 for assembling the base of the beam pumping unit, and an assembly plate 22.

[0045] The fixed bracket 1 has a positioning groove 23 for adjusting the position of the C-shaped frame 20 to align the base of the walking beam pumping unit of different sizes. The assembly block 21 is slidably disposed in the horizontal moving groove 24 opened in the C-shaped frame 20. The end of the assembly block 21 away from the C-shaped frame 20 is hinged to the assembly plate 22, and the assembly plate 22 can only be opened in one direction. The hinge point between the assembly block 21 and the assembly plate 22 is a damping structure to ensure the opening and closing of the assembly plate 22.

[0046] In its initial state, the assembly plate 22 is folded between the assembly blocks 21. This is to reduce the overall size of the device and prevent the assembly plate 22 from unfolding outwards and taking up too much space. When it is necessary to unload the equipment, it can be unfolded (see reference). Figure 5 and Figure 6 It can be known that...

[0047] Reference Figure 5 As shown, the C-shaped frame 20 slides within the positioning groove 23, allowing the equipment to adapt to pumping unit base beams of different heights. A through-type horizontal sliding groove 24 is provided in the horizontal direction of the C-shaped frame 20. Two independent assembly blocks 21 are respectively nested within this horizontal sliding groove 24 and can slide in opposite directions or towards each other along the groove, thereby adjusting the distance between them to accommodate bases of different widths.

[0048] Let's look again. Figure 5 and Figure 6 As shown, a control screw 25 is rotatably provided inside the C-shaped frame 20 to control the movement of the two assembly blocks 21.

[0049] The assembly plate 22 has several assembly holes 26 that correspond to the round holes on the base of the walking beam pumping unit. After the assembly plate 22 is unfolded and overlapped with the round holes on the base of the walking beam pumping unit, it is assembled by bolts and nuts.

[0050] In practice, first determine the model of the oilfield walking beam pumping unit and measure the dimensions of its base. Then, rotate the control screw 25 to make the mounting holes 26 on the two sets of mounting plates 22 aligned with the reserved round holes on the oilfield walking beam pumping unit base. Next, operate the entire walking beam pumping unit manual unloading device to move closer to the oilfield walking beam pumping unit base until the mounting holes 26 on the mounting plates 22 overlap with the reserved round holes on the oilfield walking beam pumping unit base. Finally, insert the bolts into the two overlapping round holes and secure them with nuts.

[0051] The above description is a solution for connecting the manual unloading device of the walking beam pumping unit to the base of the oilfield walking beam pumping unit. There are other solutions: if the oilfield walking beam pumping unit base does not have a pre-drilled round hole, rotate the control screw 25 so that the distance between the two mounting plates 22 is the same as the width of the oilfield walking beam pumping unit base. Then, the two mounting plates 22 abut against the two sides of the oilfield walking beam pumping unit base. Subsequently, rotate the control screw 25 in the opposite direction to clamp and fix the mounting plates 22 to the oilfield walking beam pumping unit base.

[0052] Both of the above methods of fixing the device are acceptable. By using the assembly plate 22 and assembly block 21, the connection applicability between the entire device and the oilfield walking beam pumping unit base can be effectively improved, so that the fixing seat 2 can adapt to oilfield walking beam pumping unit bases of various specifications.

[0053] Reference Figure 4 As shown, the two sets of assembly plates 22 sliding inside the U-shaped frame 20 are provided with serrated anti-slip textures 220 on opposite sides for clamping the base of the walking beam pumping unit. The serrated anti-slip textures 220 can improve the stability of the assembly plates 22 in clamping the base of the oilfield walking beam pumping unit.

[0054] Reference Figure 7 , Figure 8 and Figure 9 As shown, the gear ring assembly 5 is located on the side of the fixed bracket 1 near the fixed base 2, between the fixed bracket 1 and the pumping unit pulley. It is used to transmit the power output from the open reducer 3 to the pumping unit pulley, driving the crank balance block to rotate. The gear ring assembly 5 includes a drive gear 50 controlled by the hand crank 4 through the open reducer 3, a driven gear 51 controlling the pulley on the walking beam pumping unit, and a connecting column 52 on the driven gear 51 that quickly connects to the walking beam pumping unit pulley.

[0055] The driving gear 50 meshes with the driven gear 51. Several grooves 53 are equally spaced on the driven gear 51, and the connecting column 52 is slidably disposed in the grooves 53 on the driven gear 51.

[0056] In practice, the connecting column 52 is slidably disposed in the groove 53 on the driven gear 51. Before the fixed seat 2 is fixed, the position of the connecting column 52 needs to be adjusted to ensure that the connecting column 52 is close to the reserved hole on the pulley of the oilfield walking beam pumping unit. Then the connecting column 52 can be inserted into the reserved hole on the pulley of the oilfield walking beam pumping unit.

[0057] Then, the handle of the hand crank 4 is turned to make it crank at a constant speed. The power of the hand crank 4 is amplified by the open reducer 3 and transmitted to the driving gear 50. The driving gear 50 then drives the driven gear 51 to rotate. The driven gear 51 drives the pulley of the oilfield walking beam pumping unit, which is fixed by the connecting column 52, to rotate. This causes the pulley to slowly rotate the crank balance block of the existing oilfield walking beam pumping unit until the crank balance block moves to the top. After confirming that the crank balance block has been reliably locked at the specified angle, the dead brake device of the pumping unit is completely locked. Finally, the subsequent unloading operation can be safely carried out.

[0058] Furthermore, different types of walking beam pumping units in oil fields have different pulley sizes, so the positions of the reserved holes on the pulleys are also different. At this time, it is necessary to adjust the position of the connecting column 52, so the control component 6 is needed to control the distance between the connecting columns 52.

[0059] Let's look again. Figure 8 and Figure 9 As shown, the connecting column 52 is also provided with a control component 6 for adjusting the spacing of the connecting columns 52 to connect beam pumping units of different sizes. The control component 6 includes an adjusting turntable 60 rotatably connected to the driven gear 51. Several arc-shaped grooves 61 are equally spaced on the adjusting turntable 60 to control the spacing adjustment of the connecting columns 52.

[0060] A linkage adjustment part 7 is also provided between the adjustment turntable 60 and the driven gear 51. The linkage adjustment part 7 includes a toothed groove 70 opened on the driven gear 51, an adjustment column 71 that meshes with the adjustment turntable 60, and an adjustment gear 72 installed on the adjustment column 71.

[0061] The outer wall of the adjusting turntable 60 is provided with an inner tooth groove 73 that meshes with the adjusting gear 72. The adjusting column 71 is a telescopic structure and controls the adjusting gear 72 to adjust its position between the tooth groove 70 and the inner tooth groove 73.

[0062] The control component 6 is used to adjust the spacing of the connecting columns 52 to adapt to different sizes of pumping unit pulleys. The arc groove 61 is a curved groove with a gradually changing central angle. When the adjusting turntable 60 rotates, the arc groove 61, through its cooperation with the protrusion at the end of the connecting column 52, drives the connecting column 52 to move radially along the slide groove 53 of the driven gear 51, thereby realizing the adjustment of the spacing of the connecting columns 52.

[0063] For example, when the adjusting turntable 60 is rotated clockwise, the arc groove 61 pushes the connecting post 52 toward the center of the driven gear 51, reducing the distance between the connecting posts 52; when the adjusting turntable 60 is rotated counterclockwise, the connecting post 52 moves toward the edge of the driven gear 51 under the action of the arc groove 61, increasing the distance between the connecting posts 52, thereby adapting to the distribution requirements of holes or grooves on pulleys of different diameters.

[0064] It should also be noted that not all beam pumping unit pulleys are perforated; some are strip-shaped pulleys. In this case, the spacing of the connecting posts 52 is adjusted so that the connecting posts 52 pass through the middle of the strip-shaped pulley. The distance between the connecting posts 52 is adjusted, and finally, the strip-shaped pulley is connected to the driven gear 51 by clamping.

[0065] Reference Figure 10 As shown, the connecting post 52 has a mounting hole, and extension posts 54 of different diameters or shapes are installed in the mounting hole by screwing.

[0066] Various extension columns 54 of different specifications and shapes are also installed on the connecting column 52 by means of threaded connection. Because different walking beam pumping units have different sizes of pulleys at the top, the diameter of the reserved hole on the pulley will also have various different specifications. Therefore, by screwing the extension column 54 onto the connecting column 52, the extension column 54 can replace the connecting column 52 and be inserted into the reserved hole of the pulley, so as to realize the connection between the pulley and the driven gear 51 conveniently and quickly.

[0067] In addition, the shape of the pulley at the upper end of the beam pumping unit may also be different, and the extension column 54 has a variety of universal shapes. Replacing different extension columns can adapt to different shapes of reserved holes, thereby improving the applicability of the device.

[0068] Looking back Figure 8 and Figure 9 The diagram shows a schematic of the linkage adjustment unit 7 that controls the adjustment of the adjustment turntable 60. The linkage adjustment unit 7 is also provided between the adjustment turntable 60 and the driven gear 51. The linkage adjustment unit 7 includes a toothed groove 70 opened on the driven gear 51, an adjustment column 71 that meshes with the adjustment turntable 60, and an adjustment gear 72 installed on the adjustment column 71.

[0069] The outer wall of the adjusting turntable 60 is provided with an inner tooth groove 73 that meshes with the adjusting gear 72. The adjusting column 71 is a telescopic structure and controls the adjusting gear 72 to adjust its position between the tooth groove 70 and the inner tooth groove 73.

[0070] The linkage adjustment unit 7 is used to realize the linkage control between the adjustment turntable 60 and the driven gear 51, so as to ensure the accuracy and stability of the spacing adjustment of the connecting column 52.

[0071] The adjusting column 71 is a telescopic structure, and its extension and retraction have a certain damping to ensure that it can stop at the designated position after being extended or retracted. In addition, in the initial state, the adjusting gear 72 is simultaneously engaged between the toothed groove 70 and the internal toothed groove 73, so that when the driven gear 51 rotates, the adjusting turntable 60 can be limited to prevent it from rotating on its own.

[0072] In practice, if the position of the connecting column 52 needs to be adjusted, firstly, an outward force is applied to the adjusting column 71 to separate the adjusting gear 72 on the adjusting column 71 from the toothed groove 70 on the driven gear 51. At this time, the adjusting gear 72 only meshes with the internal toothed groove 73 on the adjusting turntable 60. Subsequently, the adjusting column 71 is controlled to drive the adjusting gear 72 to rotate, which in turn drives the adjusting turntable 60 that meshes with it to move. At the same time, the adjusting turntable 60 controls the connecting column 52 located in the arc-shaped groove 61 to adjust its position, thereby realizing the adjustment of the position of the connecting column 52.

[0073] Example 2: Based on Example 1, in order to further improve the efficiency of the manual unloading device of the beam pumping unit, this application also proposes an indicator locking mechanism 8. The indicator locking mechanism 8 can limit the hand crank device 4, open reducer 3, passive gear 51, and driving gear 50 after adjusting the position of the crank balance block, so as to prevent the pulley from reversing after the hand crank device 4 is released. Although the existing beam pumping unit is equipped with a brake, in order to ensure its performance, this application still needs to set the indicator locking mechanism 8 to double protect the safety of the equipment.

[0074] Reference Figure 10 and Figure 11 As shown, the fixed bracket 1 is also provided with an indicator locking mechanism 8, which includes a worm gear 80 that rotates synchronously with the passive gear 51, a worm wheel 81 that prevents the hand crank device 4 from reversing, and an indicator 82 that realizes angle indication.

[0075] The worm 80 is connected to the driven gear 51 via a coupling. The worm wheel 81 is rotatably mounted on the top of the open reducer 3 and is hinged to the worm 80. An indicator 82 is mounted on the top of the worm wheel 81. A pawl 84 is provided on one side of the worm wheel 81, and the pawl 84 is hinged to the protective cover 83 via a torsion spring.

[0076] The top of the open reducer 3 is provided with a protective cover 83 to protect the worm gear 81 and worm 80. The protective cover 83 is provided with scale markings corresponding to the indicator 82.

[0077] When the hand crank 4 rotates at a constant speed, the driven gear 51 drives the worm 80 connected by the coupling to rotate synchronously. During the rotation of the worm 80, the worm wheel 81 is driven to rotate. The rotation of the worm wheel 81 converts the position adjustment of the crank balance weight into the movement of the visual indicator 82, so that the angle and distance of the crank balance weight movement can be displayed intuitively.

[0078] When the hand crank 4 is cranked, power is transmitted to the driving gear 50 through the open reducer 3, which in turn drives the driven gear 51 to rotate. The rotation of the driven gear 51 is transmitted almost without loss to the worm gear 80 coaxially connected to it through a coupling.

[0079] The worm 80 and worm wheel 81 form a meshing pair. The worm 80 has only one tooth, so when the worm 80 rotates one revolution, the worm wheel 81 only rotates one tooth. In other words, the driven gear 51 needs to rotate tens of degrees or even larger for the worm wheel 81 to barely rotate one or two degrees. The large-amplitude rotation of the crank balance weight is converted into a small, easily observable oscillation of the indicator 82 on the dial.

[0080] The indicator 82, fixed to the top of the worm gear 81, rotates. The scale markings it points to are pre-calculated and calibrated, directly reflecting the true rotation angle of the crank balance weight. For example, the 90-degree mark on the dial directly corresponds to the position where the crank balance weight of the pumping unit forms a 90-degree angle with the horizontal direction.

[0081] The worm gear 81 has a pawl 84 that moves in one direction on one side.

[0082] Furthermore, the locking mechanism 8 not only allows for a direct sense of the movement of the crank balance weight but also creates a locking effect. When the hand crank 4 stops, the crank balance weight, under the immense load at the suspension point, experiences a strong reverse driving torque. This torque attempts to be transmitted to the worm gear 80 via the driven gear 51 and coupling, causing it to reverse. However, due to the ratchet pawl 84, the transmission is jammed, and the system cannot move in reverse.

[0083] Reference Figure 12 As shown, this application also provides a manual unloading method for a beam pumping unit, as follows: S1. Positioning and Assembly: Move the manual unloading device to the vicinity of the motor of the beam pumping unit, so that one side of the fixed base 2 faces the pumping unit base. According to the actual height of the pumping unit base, adjust the vertical position of the C-shaped frame 20 in the positioning groove 23 of the fixed bracket 1 to make it initially aligned. Then, slide the assembly block 21 in the horizontal moving groove 24 of the C-shaped frame 20, and unfold the assembly plate 22 so that the assembly hole 26 on it is aligned with the reserved hole on the pumping unit base. Pass the bolt through the assembly hole 26 and the round hole of the base, and tighten it with nuts, thereby firmly installing the entire device on the pumping unit base.

[0084] S2. Quick Connection: Place the driven gear 51 of the gear ring assembly 5 on the outside of the pumping unit pulley, rotate the adjusting turntable 60, and drive all the connecting posts 52 to move radially synchronously along the sliding groove 53 through the arc groove 61 on it, so that the connecting posts 52 are roughly aligned with the holes or grooves on the pulley. Finally, insert or clamp all the connecting posts 52 tightly into the corresponding reserved holes of the pumping unit pulley.

[0085] S3. Manual Adjustment: The operator holds the handle of the hand crank 4 and begins to crank it slowly and evenly. The power of the hand crank 4 is amplified by the open reducer 3 and then transmitted to the drive gear 50. The drive gear 50 then drives the driven gear 51, which is fixed on the pumping unit pulley, thereby driving the pumping unit pulley and the entire belt drive system, causing the crank balance block to rotate slowly.

[0086] During this process, the operator simultaneously observes the indicator locking mechanism 8. As the driven gear 51 rotates, the worm gear 80, which is synchronized with it, drives the worm wheel 81. The indicator 82 on the top of the worm wheel 81 moves along the scale line of the protective cover 83, thereby reading the precise rotation angle of the crank balance weight in real time.

[0087] S4. Precise positioning and locking: When indicator 82 points to the preset unloading position on the scale, immediately stop shaking the handle.

[0088] S5. Locking the Brake and Unloading: After confirming that the crank balance weight has been reliably locked at the specified angle, fully lock the dead brake device of the pumping unit. Finally, subsequent unloading operations can be safely carried out.

[0089] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A manual unloading device for a beam pumping unit, characterized in that: Includes a fixed bracket (1) and a fixed seat (2) located on one side of the fixed bracket (1); The fixed bracket (1) is provided with an open reducer (3) and a hand crank device (4) for controlling the open reducer (3) on the side away from the fixed seat (2). The hand crank device (4) is connected to the open reducer (3). The gear ring assembly (5) is on the same side as the fixed seat (2) and located above the fixed seat (2). The gear ring assembly (5) includes a drive gear (50), a driven gear (51) that controls the pumping unit pulley, and a connecting post (52) on the driven gear (51) that connects to the pumping unit pulley. The driving gear (50) meshes with the driven gear (51), and several grooves (53) are equally spaced on the driven gear (51). The connecting column (52) is slidably disposed in the groove (53).

2. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The connecting column (52) is also provided with a control component (6) for adjusting the spacing of the connecting column (52). The control component (6) includes an adjusting turntable (60) rotatably connected to the driven gear (51), and several arc-shaped grooves (61) are opened at equal intervals on the adjusting turntable (60).

3. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The connecting post (52) has a mounting hole, and extension posts (54) of different diameters or shapes are installed in the mounting hole by screwing.

4. The manual unloading device for a beam pumping unit according to claim 2, characterized in that: A linkage adjustment part (7) is also provided between the adjustment turntable (60) and the driven gear (51). The linkage adjustment part (7) includes a toothed groove (70) opened on the driven gear (51), an adjustment column (71) meshing with the adjustment turntable (60), and an adjustment gear (72) installed on the adjustment column (71). The outer wall of the adjusting turntable (60) has an inner tooth groove (73) that meshes with the adjusting gear (72). The adjusting gear (72) is controlled by the adjusting column (71) to adjust its position between the tooth groove (70) and the inner tooth groove (73).

5. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The fixed base (2) includes an inverted frame (20) that slides along the height direction of the fixed bracket (1), an assembly block (21) for assembling the pumping unit base, and an assembly plate (22). A positioning groove (23) for displacement of the C-shaped frame (20) is provided on the fixed bracket (1). The assembly block (21) is slidably disposed in the horizontal moving groove (24) provided on the C-shaped frame (20). The end of the assembly block (21) away from the C-shaped frame (20) is hinged to the assembly plate (22), and the assembly plate (22) can be opened in one direction. The frame (20) is equipped with a control screw (25) that controls the movement of the two assembly blocks (21).

6. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The assembly plate (22) has several assembly holes (26) corresponding to the reserved circles on the pumping unit base. After the assembly plate (22) is unfolded and overlapped with the circular holes on the walking beam pumping unit base, it is assembled by bolts and nuts.

7. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The two sets of mounting plates (22) sliding inside the C-shaped frame (20) are provided with serrated anti-slip texture (220) on opposite sides for clamping the pumping unit base.

8. The manual unloading device for a beam pumping unit according to claim 1, characterized in that: The fixed bracket (1) is also provided with an indicator locking mechanism (8), which includes a worm (80) that rotates synchronously with the driven gear (51), a worm wheel (81) that meshes with the worm (80), and an indicator (82) that makes the crank balance block visible. The worm (80) is connected to the driven gear (51) via a coupling. The worm wheel (81) is rotated on the top of the open reducer (3). An indicator (82) is installed on the top of the worm wheel (81). A pawl (84) is provided on one side of the worm wheel (81).

9. A manual unloading device for a beam pumping unit according to claim 8, characterized in that: The open reducer (3) has a protective cover (83) on top to protect the worm gear (81) and worm (80). The protective cover (83) has a groove for the indicator (82) to rotate through and a scale line for the indicator (82) to be visualized.

10. A manual unloading method for a beam pumping unit, comprising a manual unloading device for a beam pumping unit according to any one of claims 1-9, characterized in that: The manual uninstallation method is as follows: S1. Positioning and assembly: First, adjust the position of the fixed seat (2), and then install it on the pumping unit base; S2, quick docking: the gear ring assembly (5) inserts all the connecting posts (52) into the reserved holes on the pumping unit pulley; S3. Manual adjustment: Crank the hand crank device (4). The hand crank device (4) controls the gear ring assembly (5) through the open reducer (3) to drive the pumping unit pulley to work, thereby driving the crank balance block to rotate; and monitor the crank balance block rotation angle in real time. S4. Precise positioning and locking: When the crank balance block moves to the designated unloading position, stop cranking the hand crank (4) and lock it to keep the crank balance block stable in the current position; S5. Locking the brake and unloading: After confirming that the crank balance weight is reliably locked in the designated position, completely lock the dead brake device of the pumping unit, and then the subsequent unloading operation can be safely carried out.

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