Pumping unit crank counterweight wrench anti-loosening device

Abstract

The utility model discloses a pumping unit crank balance weight spanner anti -drop device, including main part, the main part is connected support portion, tensioning portion, pressure cap portion respectively, tensioning portion sets up between support portion and pressure cap portion, support portion sets up first linear adjustment structure, tensioning portion sets up and pulls back the elastic structure, the adjustment end of tensioning portion sets up the hanger, is used for and the crank groove of crank is hanged, pressure cap portion is used for and balance weight fixed bolt end head sleeve joint, and the balance weight fixed bolt is stabilized, the utility model discloses quick assembly and disassembly, when balance weight spanner is hit and bounces, the irregular migration of balance weight spanner is limited in pressure cap portion, thereby avoided balance weight spanner to drop out and fall.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping unit technology, specifically to an anti-disengagement device for the crank balance block wrench of an oil pumping unit. Background Technology

[0002] When adjusting the crankshaft balance of an oil pumping unit, the most common method used in the field is to strike the balance block wrench with a striking tool to tighten or loosen the balance block fixing nut and locking nut. During the striking process, if the balance block wrench tilts under force or its position is uneven, it will bounce, potentially causing the striking tool to slip and resulting in personal injury, or the balance block wrench to fall and damage personnel and equipment. A sledgehammer is the most commonly used striking tool, but it requires the operator to stand on the crankshaft or operating platform, posing a high skill requirement and risks of slippage, missed swings causing injury, and falls causing impact injuries.

[0003] Announcement No. CN204747976U discloses a device for tightening and loosening the fixing bolts of a pumping unit balance block, comprising: a support, a striking tool, and a lifting tool; the support of the device for tightening and loosening the fixing bolts of the pumping unit balance block has an inverted "L" structure with a pad in the middle; the striking tool has a cylindrical structure, with a rod body I connected in the middle by a coupling, and a striking head at the top, which is fixed by a nut; the rod body II of the lifting tool is also connected in the middle by a coupling, with a lifting support head at one end and a lifting wrench head at the other end.

[0004] The existing technology is cumbersome to install and adjust, cannot quickly adapt to the needs of different pumping unit models, and its field application is limited.

[0005] Announcement No. CN208906474U discloses a fall-prevention balance block wrench. The wrench head has a hexagonal wrench hole with reinforcing arc grooves at each corner. A through hole is located at the tail of the wrench. A centering cylinder is located at the bottom of the wrench head, concentric with the circumcircle of the hexagonal wrench hole. The inner diameter of the centering cylinder is larger than the circumcircle diameter of the balance block fixing nut, and its thickness is slightly greater than the thickness of the balance block fixing nut. An annular groove is located on the lower outer side of the centering cylinder. A traction ring composed of two rings (large and small) is fitted over the centering cylinder. An elastic retaining ring is located within the annular groove at the bottom of the centering cylinder to prevent the traction ring from falling off. An arc-shaped pad is located at the right center of gravity of the centering cylinder at the bottom of the main body. An elastic rope with steel hooks at both ends is attached to the traction ring at one end and to the through hole in the wrench body at the other end.

[0006] The elastic rope of this existing technology has a short service life and cannot guarantee that the balance block wrench will not fall 100%, and there is still a risk that the operator on the ground will be hit by the falling wrench.

[0007] Announcement No. CN203485095U discloses an anti-disengagement device for a pumping unit balance wrench. A wrench spring hole is drilled at the tail of the balance wrench. One end of the spring is connected to the wrench spring hole, and the other end is connected to the bolt connection hole of a T-bolt. The bottom of the T-bolt is provided with two buttons, and the lower end of the buttons is movably connected to the folding part.

[0008] The existing technology is cumbersome to install and adjust, and cannot prevent the balance wrench from coming loose and falling. It only relies on the drag of the spring to prevent the wrench from falling to the ground, but it cannot guarantee that the operator standing on the ground will not be hit on the head.

[0009] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0010] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention provides a pumping unit crank balance block wrench anti-disengagement device.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] An anti-disengagement device for a crank balance block wrench in an oil pumping unit includes a main body, which is connected to a support part, a tensioning part, and a pressure cap part. The tensioning part is located between the support part and the pressure cap part. The support part is provided with a first linear adjustment structure, and the tensioning part is provided with an upward spring-loaded structure. The adjustment end of the tensioning part is provided with a hook for engaging with the crank groove of the crank. The pressure cap part is used to engage with the end of the balance block fixing bolt.

[0013] Furthermore, the main body includes a main tube, the lower sidewall of which is rotatably connected to the support portion, and the rotation direction is the same as the length direction of the main tube;

[0014] Specifically, the lower sidewall of the main tube is connected to the tensioning portion via a second linear adjustment structure;

[0015] Specifically, the main body is rotatably connected to the pressure cap, and the rotation direction is the same as the length direction of the main pipe.

[0016] Furthermore, the supporting portion includes a rotating connection mechanism and a first linear adjustment structure;

[0017] Specifically, the first linear adjustment structure includes a threaded tube and a threaded support rod;

[0018] Specifically, the inner wall of the threaded tube is threadedly connected to the outer wall of the threaded support rod, and a first locking nut is threadedly connected to the threaded support rod;

[0019] Specifically, the upper end of the threaded support rod is rotatably connected to the main pipe through a rotating connection mechanism.

[0020] Furthermore, the rotating connection mechanism includes a connecting fork, which includes two parallel connecting plates with through holes. The connecting plates are connected to the upper end of the threaded tube, and a first connecting pin is inserted through the through hole of the connecting fork.

[0021] Specifically, a triangular rib plate is provided on the lower side wall of the main pipe, and the triangular rib plate has a first pin hole that is rotatably connected to a first connecting pin.

[0022] Furthermore, the tensioning part includes an upward spring-loaded structure and a hook-and-loop connector;

[0023] Specifically, the pull-back structure includes a stepped shaft, a threaded cap, and a spring;

[0024] Specifically, the mounting component is a suspension cylinder;

[0025] Specifically, the lower end of the stepped shaft is inserted into the suspension cylinder, the steps of the stepped shaft are located inside the suspension cylinder, a threaded cap is fitted over the stepped shaft, the threaded cap is threadedly connected to the upper end of the suspension cylinder, a spring is provided between the steps of the stepped shaft and the threaded cap, and the upper end of the stepped shaft is connected to the second linear adjustment structure of the main pipe.

[0026] Specifically, a mounting platform is provided at the lower end of the outer wall of the suspension cylinder.

[0027] Furthermore, the second linear adjustment structure is a threaded tube, with a threaded tube provided on the lower side wall of the main tube, and the upper end of the stepped shaft is threadedly connected to the threaded tube;

[0028] Specifically, a lever is connected to the outer wall of the threaded cap;

[0029] Specifically, the suspension cylinder includes an elongated oval base plate and a cylinder, with the elongated oval base plate extending out of the cylinder to form a hanging platform.

[0030] Furthermore, the cap-pressing part includes a cap tube, the inner wall of which is provided with a partition, and a strong magnetic ring is provided on the lower end face of the partition. The cap tube is rotatably connected to the main tube above the partition.

[0031] Furthermore, a horizontal tube is provided at the end of the main tube away from the supporting part;

[0032] Specifically, the cylinder wall of the cap is machined with symmetrical connecting pin holes above the partition;

[0033] Specifically, the symmetrical connecting pin holes correspond to the two ends of the horizontal tube, and a second connecting pin is inserted into the connecting pin holes and the horizontal tube. A notch is provided at the upper end of the cap tube wall for the main tube to pass through.

[0034] Furthermore, the partition and the strong magnetic ring are connected by screws and a second locking nut; the top of the cap cylinder, away from the main tube, is a forward-sloping surface.

[0035] Furthermore, a handle is provided on the upper side wall of the main tube.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] This invention allows for quick assembly and disassembly. When the balance block wrench is struck and bounces, on the one hand, the balance block wrench cannot jump out of the pressure cap part; on the other hand, the impact force of the balance block wrench hitting the main tube is offset by the reaction force generated by the spring in the tensioning part and the strong magnetic ring in the pressure cap part, so the pressure cap part will not detach from the balance block fixing bolt. The irregular movement of the balance block wrench is restricted to the cap tube and below, thereby preventing the balance block wrench from falling out. Furthermore, this invention does not hinder the adjustment of the balance block wrench angle. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the anti-disengagement device for the crank balance block wrench of the oil pumping unit according to this utility model.

[0039] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0040] Figure 3 This is a structural schematic diagram of the supporting part in this utility model.

[0041] Figure 4 This is a schematic diagram of the tensioning part in this utility model.

[0042] Figure 5 This is a structural schematic diagram of the pressure cap part in this utility model.

[0043] Figure 6 This is a schematic diagram of the structure of the present invention applied to the crank balance block of an oil pumping unit.

[0044] In the diagram: 1-Main body, 1-1-Handle, 1-2-Triangular rib plate, 1-3-Main pipe, 1-4-Threaded pipe, 1-5-Horizontal pipe, A-First pin hole;

[0045] 2-Supporting part, 2-1-Connecting fork, 2-2-First connecting pin, 2-3-Cocker pin, 2-4-Threaded tube, 2-5-Threaded support rod, 2-6-First locking nut;

[0046] 3-Tightening part, 3-1-Stepped shaft, 3-2-Threaded cap, 3-3-L-shaped lever, 3-4-Suspension cylinder, 3-5-Spring;

[0047] 4-Pressure cap part, 4-1-Cap tube, 4-2-Second connecting pin, 4-3-Partition plate, 4-4-Locking nut, 4-5 Screw, 4-6-Strong magnetic ring;

[0048] 7-Crank, 8-Balance weight wrench, 9-Balance weight fixing bolt and locking nut, 10-Balance weight fixing bolt, 11-Balance weight fixing bolt and fixing nut, 12-Pusher, 13-Balance weight, 14-Crank groove. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] Example 1:

[0051] Please see Figures 1 to 5 The present invention provides a pumping unit crank balance block wrench anti-dislodgement device, comprising a main body 1, a support part 2, a tensioning part 3, and a pressure cap part 4. The main body 1 is connected to the support part 2, the tensioning part 3, and the pressure cap part 4 respectively. The tensioning part 3 is disposed between the support part 2 and the pressure cap part 4. The support part 2 is provided with a first linear adjustment structure. The tensioning part 3 is provided with an upward spring structure. The adjustment end of the tensioning part 3 is provided with a hook for hooking with the crank groove 14 of the crank 7. The pressure cap part 4 is used to sleeve the end of the balance block fixing bolt 10.

[0052] Furthermore, the main body 1 includes a main pipe 1-3, the lower side wall of the main pipe 1-3 is rotatably connected to the support part 2, the rotation direction is the same as the length direction of the main pipe 1-3, the lower side wall of the main pipe 1-3 is connected to the tensioning part 3 through a second linear adjustment structure, and the main body 1 is rotatably connected to the pressure cap part 4, the rotation direction is the same as the length direction of the main pipe 1-3.

[0053] Specifically, the lower side wall of the main pipe 1-3 is provided with a triangular rib plate 1-2 which is rotatably connected to the support part 2, and the lower side wall of the main pipe 1-3 is provided with a threaded pipe 1-4 which is threadedly connected to the tensioning part 3. The threaded pipe 1-4 is a second linear adjustment structure, and the end of the main pipe 1-3 away from the triangular rib plate 1-2 is provided with a horizontal pipe 1-5 which is rotatably connected to the pressure cap part 4.

[0054] Specifically, the upper side wall of the main tube 1-3 is provided with an inverted U-shaped handle 1-1 for carrying, lifting and positioning.

[0055] Preferably, the handle 1-1, triangular rib plate 1-2, main pipe 1-3, threaded pipe 1-4, and horizontal pipe 1-5 are all made of carbon steel pipe, and the handle 1-1, triangular rib plate 1-2, threaded pipe 1-4, and horizontal pipe 1-5 are welded to the main pipe 1-3.

[0056] Furthermore, the support part 2 includes a rotating connection mechanism and a first linear adjustment structure. The first linear adjustment structure includes a threaded tube 2-4 and a threaded support rod 2-5. The inner wall of the threaded tube 2-4 is machined with internal threads. The inner wall of the threaded tube 2-4 is threadedly connected to the outer wall of the threaded support rod 2-5. A first locking nut 2-6 is threadedly connected to the threaded support rod 2-5. By adjusting the length of the threaded support rod 2-5 and locking it, the needs of different models can be met. The upper end of the threaded support rod 2-5 is rotatably connected to the main tube 1-3 through the rotating connection mechanism.

[0057] Specifically, the rotating connection mechanism includes a connecting fork 2-1, which comprises two parallel connecting plates with through holes. The connecting plates are welded to the upper part of the threaded pipe 2-4. A first connecting pin 2-2 is inserted through the through hole of the connecting fork 2-1. One end of the first connecting pin 2-2 is a limiting cap, and the other end is fitted with a cotter pin 2-3 to achieve axial positioning. The triangular rib plate 1-2 has a first pin hole A that is rotatably connected to the first connecting pin 2-2. The support part 2 can rotate around the first connecting pin 2-2 within a certain angle, which facilitates the disassembly and positioning of the anti-disengagement device of the oil pump crank balance block wrench.

[0058] Specifically, the inner wall of the threaded support rod 2-5 is threaded except for the included angle machined at the lower end.

[0059] Specifically, the connecting plate is a rectangular steel plate, and the inner wall of the connecting plate is provided with steps and the outer wall and upper end positioning of the threaded pipes 2-4.

[0060] Preferably, the connecting fork 2-1, the first connecting pin 2-2, the cotter pin 2-3, the threaded tube 2-4, the threaded support rod 2-5, and the first locking nut 2-6 are all made of carbon steel.

[0061] Furthermore, the tensioning part 3 includes an upward rebound structure and a hook-up component. The upward rebound structure includes a stepped shaft 3-1, a threaded cap 3-2, and a spring 3-5. The hook-up component is a suspension cylinder 3-4. The lower end of the stepped shaft 3-1 is inserted into the suspension cylinder 3-4. The steps of the stepped shaft 3-1 are located inside the suspension cylinder 3-4. The threaded cap 3-2 is sleeved on the stepped shaft 3-1. The threaded cap 3-2 is threadedly connected to the upper end of the suspension cylinder 3-4. A spring 3-5 is provided between the steps of the stepped shaft 3-1 and the threaded cap 3-2. The upper end of the stepped shaft 3-1 is connected to the second linear adjustment structure of the main pipe 1-3. A hook-up platform is provided at the lower end of the outer wall of the suspension cylinder 3-4. The hook-up platform is used to cooperate with the crank groove 14.

[0062] Specifically, the stepped shaft 3-1 is in the shape of a stepped cylinder, and the upper end of the stepped shaft 3-1 is threaded, and the upper end of the stepped shaft 3-1 is threadedly connected to the threaded pipe 1-4.

[0063] Specifically, the top wall center of the threaded cap 3-2 is machined with a hole to allow the upper part of the stepped shaft 3-1 to pass through. The lower inner wall of the threaded cap 3-2 is threadedly connected to the upper outer wall of the suspension cylinder 3-4. An L-shaped lever 3-3 is welded to the outer wall of the threaded cap 3-2. The L-shaped lever 3-3 is formed by bending a steel bar at 90° and welded to the side of the threaded cap 3-2.

[0064] Specifically, the suspension cylinder 3-4 includes an oblong base plate and a cylinder, which are integrally formed or welded together. The oblong base plate extends out of the cylinder to form a mounting platform. The upper end of the outer wall of the cylinder is machined with external threads to mate with a threaded cap 3-2. When installing the anti-disengagement device for the pumping unit crank balance block wrench, the long axis of the oblong base plate of the suspension cylinder 3-4 is aligned with the crank groove direction of the crank 7. When the base plate of the suspension cylinder 3-4 is lower than the crank groove edge of the crank 7, the L-shaped lever 3-3 is turned to make the long axis of the oblong base plate of the suspension cylinder 3-4 perpendicular to the crank groove direction. The anti-disengagement device for the pumping unit crank balance block wrench will not disengage from the crank groove when subjected to longitudinal force.

[0065] Preferably, the stepped shaft 3-1, the threaded cap 3-2, the L-shaped lever 3-3, and the suspension cylinder 3-4 are all made of carbon steel; the spring 3-5 is made of spring steel.

[0066] Furthermore, the capping part 4 includes a cap cylinder 4-1, with a partition 4-3 on the inner wall of the cap cylinder 4-1 and a strong magnetic ring 4-6 on the lower end face of the partition 4-3. The cap cylinder 4-1 is rotatably connected to the main pipe 1-3 above the partition 4-3. The outer diameter of the cap cylinder 4-1 is smaller than the inner diameter of the wrench mouth of the balance block wrench 8. When adjusting the balance, the lower part of the cap cylinder 4-1 is fitted onto the upper part of the balance block fixing bolt 10, and the strong magnetic ring 4-6 is attracted to the top surface of the balance block fixing bolt 10. The outer diameter of the cap cylinder 4-1 is smaller than the inner diameter of the balance block wrench 8. The balance block wrench 8 can move up and down or rotate within a certain range along the cap cylinder 4-1, which facilitates the adjustment of the balance block wrench 8 after it moves to the limit point and disengages from the balance block fixing bolt locking nut 9.

[0067] Among them, the balance block wrench 8 is an internal hex socket wrench, which cannot be disengaged from the anti-disengagement device of the balance block wrench of the pumping unit crank after being put on the outside of the cap 4-1.

[0068] Specifically, the cylinder wall of the cap 4-1 is machined with symmetrical connecting pin holes above the partition 4-3. The symmetrical connecting pin holes correspond to the two ends of the horizontal tube 1-5. A second connecting pin 4-2 is inserted into the connecting pin holes and the horizontal tube 1-5. A notch is provided at the upper end of the cylinder wall of the cap 4-1 for the main tube 1-3 to pass through. The cap 4-1 can rotate within a certain angle along the second connecting pin 4-2 to ensure that when the main tube 1-3 is tilted, the cap 4-1 can also be concentric with the balance block fixing bolt 10 under its own weight.

[0069] Specifically, the partition 4-3 has a threaded hole in the middle, and the strong magnetic ring 4-6 has a tapered through hole in the middle. A tapered screw 4-5 is installed in the tapered through hole of the strong magnetic ring 4-6 and the threaded hole of the partition 4-3. A second locking nut 4-4 is installed on the upper part of the tapered screw 4-5 to prevent it from falling off.

[0070] Specifically, the top of the cap 4-1, away from the main tube 1-3, is a forward-sloping surface that matches the structure of the balance block 13.

[0071] Preferably, the cap 4-1, the second connecting pin 4-2, the partition 4-3, the second locking nut 4-4, and the screw 4-5 are all made of carbon steel, and the strong magnetic ring 4-6 is made of neodymium iron boron.

[0072] Specifically, after the pressure cap part 4 is combined with the balance block fixing bolt 10, the distance between the mating surface of the crank groove 14 of the balance block fixing bolt 10 and the main body is the first distance; when the lower end of the stepped shaft 3-1 of the tensioning part 3 sits on the suspension cylinder 3-4, the distance between the mating surface of the crank groove 14 of the suspension cylinder 3-4 and the main body is the second distance; the first distance is greater than the second distance, and the difference between the first distance and the second distance is less than the compressibility of the spring 3-5, so that after the device is installed, the spring 3-5 can be compressed to generate a loading force.

[0073] The anti-disengagement device for the balance block wrench of the pumping unit crank is a stable lever mechanism that relies on the downward pull of the tensioning part 3, the upward support of the support part 2, and the strong magnetic attraction and pressing of the pressure cap part 4 onto the balance block fixing bolt 10. When the balance block wrench 8 is struck and bounces at an abnormal angle, the impact force of the balance block wrench 8 hitting the main pipe 1-3 is offset by the reaction force generated by the spring 3-5 and the strong magnetic ring 4-6 in the anti-disengagement device of the pumping unit crank balance block wrench; the irregular movement of the balance block wrench 8 is restricted to the position of the cap 4-1 and below, thereby preventing the balance block wrench from falling out.

[0074] Example 2:

[0075] Based on Example 1, this example provides a method for using the anti-disengagement device for the crank balance block wrench of an oil pumping unit, including the following steps:

[0076] Stop the pumping unit crank 7 in a near-horizontal position, apply the brakes, and disconnect the power.

[0077] Place the balance block wrench 8 onto the balance block fixing bolt and tighten the nut 9. The arc-shaped pad 12 in the middle of the handle of the balance block wrench 8 is used to level the balance block wrench 8.

[0078] The pressure cap 4 of the anti-disengagement device of the balance block wrench is fitted onto the balance block fixing bolt 10. The strong magnetic ring 4-6 is attracted to the top surface of the balance block fixing bolt. The tensioning part 3 is inserted into the crank groove 14 of the crank 7. The L-shaped lever 3-3 is rotated 90°. The oblong bottom plate of the suspension cylinder 3-4 is hung under the crank groove 14. The handle 1-1 is lifted, the stepped shaft 3-1 moves upward, and the spring 3-5 is compressed and shortened, so that the main pipe 1-3 is in a horizontal state. The position and length of the support part 2 are adjusted so that the support part 2 is close to perpendicular to the crank. The threaded support rod 2-5 contacts the bottom of the crank groove.

[0079] Strike the balance block wrench 8 to its limit angle, lift the balance block wrench 8 to disengage it from the balance block fixing bolt lock nut 9, put it on the cap 4-1, rotate the balance block wrench 8 to the appropriate angle, lower the balance block wrench 8 and put it on the balance block fixing bolt lock nut 9, repeat this cycle until the balance block fixing bolt lock nut 9 is loosened.

[0080] Remove the anti-disengagement device of the crank balance block wrench of the pumping unit, lift the handle 1-1, and pull the support part 2 to release the tension of the suspension cylinder 3-4 of the tensioning part 3 and the crank groove 14. Move the L-shaped lever 3-3 in the opposite direction to rotate 90°, remove the pressure cap part 4, and complete the disassembly of the anti-disengagement device of the crank balance block wrench of the pumping unit. Remove the balance block wrench 8 and adjust the position of the balance block 13.

[0081] After the position of the balance block 13 is determined, reinstall the balance block wrench 8 and the anti-disengagement device of the balance block wrench of the pumping unit crank. Strike the balance block wrench 8 in the opposite direction to the limit angle, lift the balance block wrench 8 to rotate and reset it, lower the balance block wrench 8, and put the wrench mouth onto the balance block fixing bolt fixing nut 11. Strike the balance block wrench 8 repeatedly to tighten the balance block fixing bolt fixing nut 11 and the bolt locking nut 9.

[0082] Finally, remove the anti-disengagement device of the balance block wrench on the pumping unit crank and take off the balance block wrench 8.

[0083] During the process of striking the anti-fall counterweight wrench 8, the counterweight wrench 8 bounces and is blocked by the counterweight wrench anti-dislodgement device, so it will not fall, thus ensuring the safety of the ground operator.

[0084] It should be noted that the crank 7 is a basic component of the walking beam pumping unit and belongs to the prior art. Therefore, only a partial structural diagram is provided. Those skilled in the art are clear about the position and operation of the crank in the walking beam pumping unit.

[0085] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0086] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0087] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0088] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crank balance weight wrench anti-disengagement device for an oil pumping unit, comprising a main body, characterized in that, The main body is respectively connected to the support part, the tensioning part, and the pressure cap part; The tensioning part is disposed between the supporting part and the pressure cap part; The support portion is provided with a first linear adjustment structure, the tensioning portion is provided with an upward rebound structure, the adjustment end of the tensioning portion is provided with a hook for hooking with the crank groove of the crank, and the pressure cap portion is used to fit with the end of the balance block fixing bolt.

2. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 1, characterized in that, The main body includes a main tube, the lower sidewall of which is rotatably connected to a supporting part, and the rotation direction is the same as the length direction of the main tube. The lower sidewall of the main tube is connected to the tensioning part via a second linear adjustment structure; The main body is rotatably connected to the pressure cap, and the rotation direction is the same as the length direction of the main pipe.

3. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 2, characterized in that, The supporting part includes a rotating connection mechanism and a first linear adjustment structure; The first linear adjustment structure includes a threaded tube and a threaded support rod; The inner wall of the threaded tube is threadedly connected to the outer wall of the threaded support rod, and a first locking nut is threadedly connected to the threaded support rod. The upper end of the threaded support rod is rotatably connected to the main pipe through a rotating connection mechanism.

4. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 3, characterized in that, The rotating connection mechanism includes a connecting fork, which includes two parallel connecting plates with through holes. The connecting plates are connected to the upper end of the threaded tube, and a first connecting pin is inserted through the through hole of the connecting fork. The lower side wall of the main pipe is provided with a triangular rib plate, and the triangular rib plate has a first pin hole that is rotatably connected to a first connecting pin.

5. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 2, characterized in that, The tensioning part includes an upward spring-loaded structure and a hook-and-loop component; The pull-back structure includes a stepped shaft, a threaded cap, and a spring; The mounting component is a suspension cylinder; The lower end of the stepped shaft is inserted into the suspension cylinder, the steps of the stepped shaft are located inside the suspension cylinder, the stepped shaft is fitted with a threaded cap, the threaded cap is threadedly connected to the upper end of the suspension cylinder, a spring is provided between the steps of the stepped shaft and the threaded cap, and the upper end of the stepped shaft is connected to the second linear adjustment structure of the main pipe. A mounting platform is provided at the lower end of the outer wall of the suspension cylinder.

6. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 5, characterized in that, The second linear adjustment structure is a threaded tube, with a threaded tube provided on the lower side wall of the main tube, and the upper end of the stepped shaft is threadedly connected to the threaded tube; The threaded cap is connected to a lever on its outer wall; The suspension cylinder includes an oblong base plate and a cylinder, with the oblong base plate extending out of the cylinder to form a hanging platform.

7. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 2, characterized in that, The cap-pressing part includes a cap tube, a partition is provided on the inner wall of the cap tube, a strong magnetic ring is provided on the lower end face of the partition, and the cap tube is rotatably connected to the main tube above the partition.

8. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 7, characterized in that, A horizontal pipe is installed at the end of the main pipe away from the support part; The cap cylinder wall has symmetrical connecting pin holes machined above the partition; Symmetrical connecting pin holes correspond to both ends of the horizontal tube. A second connecting pin is inserted into the connecting pin holes and the horizontal tube. A notch is provided at the upper end of the cap tube wall for the main tube to pass through.

9. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 7, characterized in that, The partition and the strong magnetic ring are connected by screws and a second locking nut; the top of the cap is a forward-sloping surface away from the main tube.

10. The anti-disengagement device for the crank balance block wrench of the oil pumping unit according to claim 2, characterized in that, A handle is provided on the upper side wall of the main tube.

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