Quick dismounting device for crank pin of rod-pumped well

Abstract

The utility model relates to the technical field of oil pumping unit maintenance tools, in particular to a quick dismounting device for a crank pin of an oil pumping unit well, which comprises a tubular slide way, the left end and the right end of the slide way are respectively provided with a bearing seat mounted on the crank pin, and the protruding part of the crank pin penetrates through the bearing seats and extends into the slide way; a sliding hammer moving left and right along the sliding way is arranged in the sliding way, and a balancing weight is arranged in the sliding hammer. The side wall of the slide way is provided with an axially-through sliding groove, and the sliding hammer is provided with a movable handle matched with the sliding groove. According to the quick disassembling device for the crank pins of the rod-pumped well, the position of the sliding way is fixed through the bearing base and the crank pins, the crank pins at the left end and the right end can be knocked at the same time by means of the weight and inertia of the balancing weight only by pulling the sliding hammer, and a hammer does not need to be waved any more; therefore, the motion range of the crank pin on the oil pumping unit is reduced, the danger of high-altitude work and the working intensity of workers are reduced, and the workload of disassembling the crank pin is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pumping unit maintenance tools, and in particular to a quick disassembly device for oil pumping unit well crank pins. Background Technology

[0002] In oilfield production, pumping units, as one of the most common oil extraction devices, are often installed in various environments for oil extraction. Adjusting the pumping unit's stroke to maintain stable output requires removing and maintaining the crank pins. However, after prolonged operation, the crank pins often rust or become stuck on the pumping unit due to environmental factors, making them extremely difficult to remove. Current technology typically involves workers climbing onto the pumping unit and using a hammer to loosen the crank pins. However, operating a hammer at a height in limited space is a highly dangerous task, increasing the risk of injury, safety, and workload. Therefore, to address these shortcomings, a quick-release device for pumping unit crank pins has been proposed. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a quick disassembly device for crank pins in oil pumping wells, which solves the problem that workers need to swing a hammer from a height to strike the crank pins when disassembling them, which is highly dangerous and labor-intensive.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model provides a quick disassembly device for the crank pin of a pumping unit well, comprising:

[0007] The slide is tubular, with a load-bearing seat at each end. The load-bearing seat has an opening in the middle that matches the size of the disassembled crank pin. The side wall of the slide has a groove that runs through it axially. A sliding hammer is installed inside the slide, and a counterweight is installed inside the sliding hammer. A movable handle is installed below the sliding hammer, and the position and size of the movable handle correspond to the groove.

[0008] Preferably, the support base and the slide are detachably connected.

[0009] Preferably, on the outer wall of the slide, there is a mounting groove on each of the left and right sides of the slide groove, the two mounting grooves are symmetrically arranged about the slide groove and the size of the mounting groove matches the sliding hammer.

[0010] Preferably, each of the mounting slots is provided with an opening and closing door, which is hinged to the outer wall of the slide rail. There is a gap between the two opening and closing doors after they are engaged, and the position and size of the gap correspond to the slide rail.

[0011] Preferably, the support base is annular, and the lower end of the support base is provided with a tubular support pipe. The side wall of the support pipe is provided with an opening, the size of which matches the size of the slide.

[0012] Preferably, the top of the load-bearing seat is provided with a matching nut, and the matching nut is provided with an axially penetrating mounting hole in the middle; the matching nut of the load-bearing seat is provided with an internal thread on the inner wall of the mounting hole that mates with the crank pin.

[0013] Preferably, the support base is provided with a mounting handle that extends radially outward.

[0014] Preferably, the sliding hammer is a hollow tube with dimensions matching the inner diameter of the slide rail, and both ends of the sliding hammer are sealed.

[0015] Preferably, the sliding hammer is provided with a mounting groove, and the counterweight is placed into the sliding hammer through the mounting groove.

[0016] (III) Beneficial Effects

[0017] The quick-release device for crank pins in oil pumping units provided by this utility model fixes the position of the slide by engaging the crank pin with the opening in the middle of the bearing seat. Simply pull the sliding hammer loaded with counterweight in the left and right direction to strike the crank pins at both ends simultaneously using the weight and inertia of the counterweight. This eliminates the need for workers to swing a hammer at a height to strike the crank pins, thereby reducing the range of motion of workers when performing maintenance work on the oil pumping unit, reducing the danger of working at height, and reducing the workload of workers and the amount of work required to disassemble the crank pins. Attached Figure Description

[0018] Figure 1 A structural diagram of a quick-release device for the crank pin of a pumping unit well;

[0019] Figure 2 This is a structural diagram of the sliding hammer in the quick-release device for the crank pin of an oil pumping unit.

[0020] Legend:

[0021] 1. Load-bearing base; 2. Slide rail; 3. Sliding hammer; 4. Moving handle; 5. Installation handle; 6. Opening and closing door. Detailed Implementation

[0022] 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.

[0023] like Figure 1-2 As shown, this utility model provides a quick disassembly device for crank pins in oil pumping units, comprising: a tubular slide 2, with a support seat 1 at each end of the slide 2, and an opening in the middle of the support seat 1 that matches the size of the crank pin to be disassembled. During operation, the support seat 1 can be installed on the crank pin through the middle opening. Typically, crank pins on oil pumping units are symmetrically distributed. When disassembling a crank pin, the crown nut on the inner side of the crank pin needs to be removed first, and then the crank pin is tapped from the inside out to loosen it. Since the crank pins are symmetrically arranged on the oil pumping unit, the parts of the two crank pins that need to be tapped are arranged opposite each other on the oil pumping unit. When installing the support seat 1, one support seat 1 is installed on each crank pin, so the support seats 1 installed on two opposing crank pins are correspondingly positioned and arranged opposite each other. The load-bearing seat 1 is mainly used to fix the slide rail 2. After the load-bearing seat 1 is installed, the slide rail 2 is installed between the two load-bearing seats 1 to fix the slide rail 2 between the two symmetrically arranged crank pins, with the left and right ends of the slide rail 2 facing the two crank pins. At this time, the ends of the two crank pins pass through the load-bearing seat 1 and extend into the slide rail 2.

[0024] The load-bearing base 1 and the slide rail 2 are detachably connected. During installation, the load-bearing base 1 can be installed first, and its position fixed on the crank pin. Then, the slide rail 2 can be connected to the load-bearing base 1. This eliminates the need for workers to lift the load-bearing base 1 and the slide rail 2 at the same time during installation, reducing the workload of workers.

[0025] It should be noted that the bottom of the support seat 1 is annular, and the lower end of the support seat 1 is tubular with an opening on the side wall. The size of the opening matches the size of the slide rail 2. During installation, after aligning the top of the support seat 1 with the crank pin, insert the support seat 1 onto the crank pin. Then, adjust the direction of the support seat 1 so that the openings at the bottom of the two aligned support seats 1 face upwards. At this point, simply insert the left and right ends of the slide rail 2 into the support seat 1 through the openings at the bottom of the two support seats 1 to complete the installation of the slide rail 2. After the slide rail 2 is installed in the support seat 1, it falls into the tubular structure at the lower end of the support seat 1 under its own weight. At the same time, the support seats 1 at both ends fix the direction of the slide rail 2 on the left and right sides, thereby achieving the fixed installation of the slide rail 2.

[0026] In this invention, the slide rail 2 has an axially penetrating groove on its side wall; a sliding hammer 3 is installed inside the slide rail 2, and a counterweight is installed inside the sliding hammer 3; a movable handle 4 is located below the sliding hammer 3, and the position and size of the movable handle 4 correspond to the groove. When the sliding hammer 3 moves left and right along the slide rail 2, it will contact the ends of the crank pins extending into the left and right ends of the slide rail 2 under the action of its own weight and inertia, thereby striking the crank pins and causing them to loosen and fall off. During the operation, the operator can move the sliding hammer 3 synchronously by moving the handle 4. After the sliding hammer 3 is installed, the position of the moving handle 4 coincides with the groove on the surface of the slide 2. The moving handle 4 extends out of the slide 2 from the groove. At this time, the operator can directly pull the moving handle 4 extending out of the slide 2 to move it left and right along the slide 2, causing the sliding hammer 3 to move synchronously. When the sliding hammer 3 contacts the crank pin during the left and right movement, it impacts the crank pin under the gravity and inertia of itself and the internal counterweight. Under repeated impacts, the crank pin gradually loosens. After the crank pin is loosened, the operator can remove it from the pumping unit.

[0027] The slide 2 has an installation slot on each of its left and right sides. These slots are symmetrically arranged about the slide 2, and their dimensions match those of the sliding hammer 3. The installation slots are used to install the sliding hammer 3. After the slide 2 is installed and stabilized, the sliding hammer 3 is inserted into the slide 2 through the installation slot. This eliminates the need to install the sliding hammer 3 in the slide 2 first and then fix its position, preventing the sliding hammer 3 from sliding back and forth within the slide 2 during installation and affecting its balance, thus improving the stability of the device. If the sliding hammer 3 is installed in the slide 2 first and then the slide 2 is installed, the sliding hammer 3 is prone to bumping into things and causing injury to workers during its back-and-forth movement. The installation slots, which position the sliding hammer 3 relative to the slide 2, effectively prevent injury to workers during its movement, thereby improving the safety of the device.

[0028] It should be noted that each mounting slot is equipped with an opening / closing door 6, which is hinged to the outer wall of the slide rail 2. When two opening / closing doors 6 are engaged, there is a gap between them, the position and size of which correspond to the slide rail. A hinge is provided at the connection between the opening / closing door 6 and the slide rail 2, hinged to the door 6. When installing the sliding hammer 3, the mounting slot is opened by flipping the opening / closing door 6 outwards, allowing the sliding hammer 3 to be directly inserted into the mounting slot and fed into the slide rail 2. After installing the sliding hammer 3, the opening / closing door 6 is flipped inwards to close the mounting slot. At this point, the opening / closing door 6 seals the mounting slot. As the sliding hammer 3 moves through the mounting slot within the slide rail 2, the opening / closing door 6 prevents the sliding hammer 3 from falling out of the mounting slot, thus preventing the sliding hammer 3 from detaching from the slide rail 2 during operation. This maintains the stable operation of the device while preventing the falling sliding hammer 3 from injuring workers, improving the stability and safety of the device. Since there is a gap in the middle after the two doors 6 are engaged, and the size and position of the gap correspond to the slide rail, the gap and the slide rail are connected to form a whole. During the back-and-forth movement of the sliding hammer 3, the handle 4 moves back and forth in the gap and the slide rail without affecting the normal operation of the sliding hammer 3.

[0029] In addition, to further improve the stability of the device, a magnet is usually provided at the bottom of the opening and closing door 6. When the opening and closing door 6 is closed, the two magnets at the bottom attract each other, fixing the position of the opening and closing door 6, thereby fixing the opening and closing door 6 in the closed position and preventing the opening and closing door 6 from opening and causing the sliding hammer 3 to fall during the striking of the crank pin. Under normal circumstances, the length of the mounting groove is slightly smaller than the length of the sliding hammer 3. When installing and removing the sliding hammer 3, it needs to be tilted at a certain angle to the slide rail 2 before it can enter or exit the slide rail 2 along the mounting groove. During the striking operation, since the sliding hammer 3 is always parallel to the slide rail 2, the sliding hammer 3 cannot be withdrawn from the mounting groove, thus cooperating with the opening and closing door 6 to prevent the sliding hammer 3 from falling off.

[0030] In this invention, the top of the load-bearing seat 1 is provided with a matching nut, and the matching nut has an axially penetrating mounting hole in the middle. The matching nut of the load-bearing seat has an internal thread on the inner wall of the mounting hole that mates with the crank pin. When installing the load-bearing seat 1, after inserting the protruding part of the crank pin into the load-bearing seat 1 along the mounting hole, rotating the load-bearing seat 1 can fix the load-bearing seat 1 and the crank pin together through the internal thread, thereby improving the stability of the load-bearing seat 1, preventing the load-bearing seat 1 from slipping due to vibration during the hammering process, and preventing the slide rail 2 fixed on the load-bearing seat 1 from falling off after the load-bearing seat 1 slips off, thereby improving the stability of the device. During installation, the total length of the device can be adjusted appropriately by the connection depth between the load-bearing seat 1 and the crank pin. When the distance between the two crank pins is relatively large, the load-bearing seat 1 can be fixed to the crank pins when installing the load-bearing seat 1, without the crank pins needing to extend into the slide rail 2. In this case, when the sliding hammer 3 moves, it will strike the load-bearing seat 1, and the load-bearing seat 1 will transmit the force to the crank pins. At this time, the length of the device is the longest working length, which is slightly less than the total length of the slide rail 2 and the load-bearing seats 1 at both ends. When the distance between the two crank pins is relatively small, the load-bearing seat 1 can be rotated to the bottom of the crank pins when installing the load-bearing seat 1. At this time, the working length of the device is the minimum working length, which is approximately equal to the length of the slide rail 2.

[0031] When installing the load-bearing seat 1, it is important to ensure that the top of the load-bearing seat 1 is not flush against the plane at the root of the crank pin. A gap should be left to allow the crank pin to loosen after being struck.

[0032] It should be noted that, in order to facilitate the rotation, installation, and disassembly of the load-bearing base 1, the load-bearing base 1 is provided with a radially outward extending installation handle 5. Rotating the handle will rotate the load-bearing base 1, reducing the difficulty of operating the device.

[0033] like Figure 2 As shown, the sliding hammer 3 is a hollow tube with dimensions matching the inner diameter of the slide rail 2, and both ends of the sliding hammer 3 are sealed. The sliding hammer 3 has a mounting groove through which a counterweight is inserted. Adjusting the weight of the counterweight changes the striking force of the sliding hammer 3 during operation. Typically, a counterweight weight of 35kg is sufficient for most striking needs. In practice, the weight of the counterweight can be adjusted according to the specific requirements.

[0034] During the installation process, the counterweight is usually installed inside the sliding hammer 3 before the sliding hammer 3 is installed. The counterweight enters the slide rail 2 together with the sliding hammer 3.

[0035] Combination Figures 1 to 2 The following describes the steps involved in operating this quick-release device for the crank pin of an oil pumping unit:

[0036] Step 1: Workers climb to the top of the pumping unit and install the support seat on the crank pin. At this point, turning the installation handle causes the support seat to rotate and connect to the crank pin through the internal thread.

[0037] Step 2: Place the left and right ends of the slide rail on the support base to fix the slide rail in place. At this time, the protruding part of the crank pin will pass through the mounting holes of the support base and extend into the slide rail from both ends.

[0038] Step 3: Place the counterweight into the mounting slot and install the sliding hammer into the slide rail. When installing the sliding hammer, first open the door, then tilt one end of the sliding hammer into the slide rail. Align the moving handle with the slide rail, then insert the sliding hammer into the slide rail along the mounting slot. Then close the door, and the position of the door will be fixed by the magnet, sealing the mounting slot.

[0039] Step 4: Pull the sliding hammer left and right along the slide rail to strike the crank pin until it loosens. During this process, the sliding hammer moves left and right along the slide rail under the push and pull of the operator. The left and right ends of the sliding hammer contact the part of the crank pin that extends into the slide rail, using its own weight and the inertia of the internal counterweight to strike the crank pin.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-release device for the crank pin of a pumping unit well, characterized in that, include: A tubular slide (2) is provided at each end of the slide (2), and a load-bearing seat (1) is provided at the middle of the load-bearing seat (1) to match the size of the disassembled crank pin; a sliding groove is provided on the side wall of the slide (2) through the axis; a sliding hammer (3) is provided in the slide (2), and a counterweight is provided in the sliding hammer (3); a moving handle (4) is provided below the sliding hammer (3), and the position and size of the moving handle (4) correspond to the sliding groove.

2. The quick-release device for the crank pin of a pumping unit well according to claim 1, characterized in that, The load-bearing seat (1) and the slide (2) are detachably connected.

3. The quick-release device for the crank pin of a pumping unit well according to claim 2, characterized in that, On the outer wall of the slide (2), there is a mounting groove on each of the left and right sides of the slide groove. The two mounting grooves are arranged symmetrically about the slide groove and the size of the mounting groove is matched with the sliding hammer (3).

4. The quick-release device for the crank pin of a pumping unit well according to claim 3, characterized in that, Each of the mounting slots is provided with an opening and closing door (6), which is hinged to the outer wall of the slide (2). There is a gap between the two opening and closing doors (6) after they are fastened together, and the position and size of the gap correspond to the slide.

5. The quick-release device for the crank pin of a pumping unit well according to claim 4, characterized in that, The load-bearing seat (1) is ring-shaped, and the lower end of the load-bearing seat (1) is tubular with an opening on the side wall. The size of the opening matches the size of the slide (2).

6. The quick-release device for the crank pin of a pumping unit well according to claim 5, characterized in that, The top of the load-bearing seat (1) is provided with a matching nut, and the matching nut is provided with an axially penetrating mounting hole in the middle; the matching nut of the load-bearing seat is provided with an internal thread that cooperates with the crank pin on the inner wall of the mounting hole.

7. The quick-release device for the crank pin of a pumping unit well according to claim 6, characterized in that, The load-bearing base (1) is provided with a radially outward extending mounting handle (5).

8. The quick-release device for the crank pin of a pumping unit well according to claim 7, characterized in that, The sliding hammer (3) is a hollow tube with dimensions that match the inner diameter of the slide (2), and the left and right ends of the sliding hammer (3) are sealed.

9. The quick-release device for the crank pin of a pumping unit well according to claim 8, characterized in that, The sliding hammer (3) is provided with an installation groove, and the counterweight is placed into the sliding hammer (3) through the installation groove.

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