A quick extraction device for oilfield pumping unit connecting rod pin

Abstract

The utility model discloses a kind of oilfield pumping unit connecting rod pin quick extraction device, including pumping unit body, the outside of pumping unit body is rotatably installed with crank, connecting rod pin is movably installed between pumping unit body and crank, the side of connecting rod pin close to pumping unit body is fixedly installed with threaded head, the outer surface of threaded head is threadedly connected with bushing, the inside of bushing is movably installed with slide, the outer end of slide is fixedly installed with baffle plate. The utility model can be according to the size of connecting rod pin and threaded head, select the bushing of same diameter size with threaded head, the threaded connection of bushing and threaded head is carried out, then the threaded slot inside bushing inside is inserted into slide, the limiting rod on the surface of slide is clamped into the inside of limiting slot, so as to realize the fixation between threaded head, bushing and slide, so that the device is convenient to different size connecting rod pin and threaded head for extraction.

Description

Technical Field

[0001] This utility model relates to the field of connecting rod pin removal technology, specifically a device for quickly removing connecting rod pins from oilfield pumping units. Background Technology

[0002] A pumping unit is a machine used for extracting oil, commonly known as a "nodding donkey." It is the most important lifting device in a rod-pumped oil system. The connecting rod pin assembly is a heavy-load moving part on the pumping unit, and it also plays a role in transmitting power. If a problem occurs, it will directly affect the normal operation of the pumping unit. Therefore, its maintenance is one of the key aspects of the daily management of the pumping unit. If a problem is found with the connecting rod pin, it needs to be repaired or replaced in a timely manner.

[0003] Existing connecting rod pin removal devices for oil pumping units are often difficult to adapt to connecting rod pins of different sizes, and it is also difficult to replace the bushings during use; therefore, they do not meet the current requirements. In response, we propose a quick-release device for connecting rod pins of oilfield pumping units. Summary of the Invention

[0004] The purpose of this utility model is to provide a quick removal device for connecting rod pins of oilfield pumping units, so as to solve the problems mentioned in the background art, such as the difficulty in adapting the connecting rod pin removal device to connecting rod pins of different sizes and the difficulty in replacing the bushing during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-release device for connecting rod pins of an oilfield pumping unit, comprising a pumping unit body, a crank rotatably mounted on the outer side of the pumping unit body, a connecting rod pin movably mounted between the pumping unit body and the crank, a threaded head fixedly mounted on the side of the connecting rod pin near the pumping unit body, a bushing threadedly connected to the outer surface of the threaded head, a slide bar movably mounted inside the bushing, a strike plate fixedly mounted on the outer end of the slide bar, a handle fixedly mounted on the outer end of the strike plate, and a sliding hammer slidably mounted on the surface of the slide bar.

[0006] Preferably, the inner side of the bushing is provided with a threaded groove, which is threadedly connected to the surface of the threaded head, and the inner wall surface of the threaded groove is provided with four limiting grooves.

[0007] Preferably, the slide bar has four spring grooves on the side near the bushing, and a limit rod is slidably installed inside each of the spring grooves, and the limit rod is movably engaged inside the limit groove.

[0008] Preferably, a compression spring is movably installed between the limiting rod and the inside of the spring groove, with one end of the compression spring connected to the limiting rod and the other end of the compression spring connected to the inner wall of the spring groove.

[0009] Preferably, each of the spring grooves has a slide bar inner groove inside, and each of the limiting rods has a U-shaped connecting rod fixedly installed at its end. The U-shaped connecting rod is movably inserted into the slide bar inner groove, and the other end of the U-shaped connecting rod extends through the surface of the slide bar to the outside of the slide bar. The surface of the U-shaped connecting rod located on the outside of the slide bar has a bevel, and the U-shaped connecting rod is movably inserted into the inside of the compression spring.

[0010] Preferably, a handrail is fixedly installed on the outer surface of the slide hammer, and a striker is threadedly connected to the side of the slide hammer near the strike plate, the striker being slidably installed on the surface of the slide bar.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the cooperation of a limiting rod and a compression spring, allows the device to select a bushing with the same diameter as the threaded head according to the size of the connecting rod pin and the threaded head. The bushing is then threadedly connected to the threaded head, and the slide bar is inserted into the threaded groove inside the bushing. The limiting rod on the surface of the slide bar is then engaged in the limiting groove, thereby fixing the threaded head, bushing, and slide bar. This makes it convenient for the device to remove connecting rod pins and threaded heads of different sizes. 2. This utility model utilizes the cooperation of the concave plate and the inclined surface. When it is necessary to remove the slide bar, the handrail can be grasped and the slide hammer pushed towards the bushing. This causes the concave plate on the surface of the slide hammer to contact the inclined surface on the surface of the U-shaped connecting rod, thereby causing the U-shaped connecting rod to be pushed and retract into the inner groove of the slide bar. At this time, the U-shaped connecting rod will drive the limiting rod to retract into the inner groove of the spring, thereby releasing the limiting between the slide bar and the bushing. Then, the bushing can be unscrewed from the surface of the threaded head through the thread, thus completing the disassembly and assembly of the threaded head, bushing and slide bar. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional front view of the entire utility model; Figure 3 This is a top cross-sectional view of the entire utility model; Figure 4 This utility model Figure 2 A partial structural diagram of part A in the middle.

[0013] In the diagram: 1. Pumping unit body; 2. Crank; 3. Connecting rod pin; 4. Threaded head; 5. Bushing; 6. Slide bar; 7. Inner concave plate; 8. Slide hammer; 9. Impact head; 10. Handrail; 11. Impact plate; 12. Handle; 13. Threaded groove; 14. Limiting groove; 15. Spring groove; 16. Limiting rod; 17. Compression spring; 18. Slide bar inner groove; 19. U-shaped connecting rod; 20. Inclined surface. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Please see Figures 1 to 4 An embodiment of this utility model provides a quick removal device for connecting rod pins of an oilfield pumping unit, comprising a pumping unit body 1, a crank 2 rotatably mounted on the outer side of the pumping unit body 1, a connecting rod pin 3 movably mounted between the pumping unit body 1 and the crank 2, a threaded head 4 fixedly mounted on the side of the connecting rod pin 3 near the pumping unit body 1, a bushing 5 threadedly connected to the outer surface of the threaded head 4, a slide bar 6 movably mounted inside the bushing 5, a strike plate 11 fixedly mounted on the outer end of the slide bar 6, a handle 12 fixedly mounted on the outer end of the strike plate 11, and a sliding hammer 8 slidably mounted on the surface of the slide bar 6.

[0016] The inner side of the bushing 5 is provided with a threaded groove 13, which is threaded to the surface of the threaded head 4. The inner wall surface of the threaded groove 13 is provided with four limiting grooves 14.

[0017] The slide bar 6 has four spring grooves 15 on the side near the bushing 5. Limiting rods 16 are slidably installed inside the spring grooves 15, and the limiting rods 16 are movably engaged into the limiting grooves 14.

[0018] A compression spring 17 is movably installed between the limiting rod 16 and the inside of the spring groove 15. One end of the compression spring 17 is connected to the limiting rod 16, and the other end of the compression spring 17 is connected to the inner wall of the spring groove 15.

[0019] By using the limiting rod 16 and the compression spring 17, the device can select a bushing 5 with the same diameter as the threaded head 4 according to the size of the connecting rod pin 3 and the threaded head 4. The bushing 5 is then threadedly connected to the threaded head 4. Subsequently, the slide bar 6 is inserted into the threaded groove 13 inside the bushing 5, so that the limiting rod 16 on the surface of the slide bar 6 is engaged in the limiting groove 14. This fixes the threaded head 4, the bushing 5 and the slide bar 6, making it convenient for the device to remove connecting rod pins 3 and threaded heads 4 of different sizes.

[0020] The spring groove 15 is provided with a slide bar inner groove 18. The end of the limiting rod 16 is fixedly installed with a U-shaped connecting rod 19. The U-shaped connecting rod 19 is movably inserted into the slide bar inner groove 18. The other end of the U-shaped connecting rod 19 extends through the surface of the slide bar 6 to the outside of the slide bar 6. The surface of the U-shaped connecting rod 19 located on the outside of the slide bar 6 is provided with a slope 20. The U-shaped connecting rod 19 is movably inserted into the inside of the compression spring 17.

[0021] With the cooperation of the concave plate 7 and the inclined surface 20, when it is necessary to remove the slide bar 6, the slide hammer 8 can be pushed towards the bushing 5 by grasping the handle 10, so that the concave plate 7 on the surface of the slide hammer 8 contacts the inclined surface 20 on the surface of the U-shaped connecting rod 19, thereby causing the U-shaped connecting rod 19 to be pushed and retracted into the inner groove 18 of the slide bar. At this time, the U-shaped connecting rod 19 will drive the limiting rod 16 to retract into the inner groove 15 of the spring, thereby releasing the limiting between the slide bar 6 and the bushing 5. Then, the bushing 5 can be screwed out from the surface of the threaded head 4 through the thread, thus completing the disassembly and assembly of the threaded head 4, the bushing 5 and the slide bar 6.

[0022] A handrail 10 is fixedly installed on the outer surface of the slide hammer 8. A strike head 9 is threadedly connected to the side of the slide hammer 8 near the strike plate 11. The strike head 9 is slidably installed on the surface of the slide bar 6.

[0023] When using this quick-release device for connecting rod pins of oilfield pumping units, first select a bushing 5 with the same diameter as the threaded head 4 according to the size of the connecting rod pin 3 and the threaded head 4, and thread the bushing 5 to the threaded head 4. Then insert the slide bar 6 into the threaded groove 13 inside the bushing 5, so that the limiting rod 16 on the surface of the slide bar 6 is engaged in the limiting groove 14, thereby fixing the threaded head 4, the bushing 5 and the slide bar 6, thus facilitating the removal of connecting rod pins 3 and threaded heads 4 of different sizes. When removing the connecting rod pin 3, the worker holds the handrail 10 with one hand and the handle 12 with the other, and then pushes the sliding hammer 8 towards the impact plate 11, so that the sliding hammer 8 drives the impact head 9 to hit the impact plate 11, thereby generating an axial thrust to pull the connecting rod pin 3 from between the pumping unit body 1 and the crank 2. After the impact head 9 hits the impact plate 11 multiple times, the connecting rod pin 3 can be removed from between the pumping unit body 1 and the crank 2. When it is necessary to remove the slide bar 6, the slide hammer 8 can be pushed towards the bushing 5 by grasping the handle 10. This will cause the concave plate 7 on the surface of the slide hammer 8 to contact the inclined surface 20 on the surface of the U-shaped connecting rod 19, thereby causing the U-shaped connecting rod 19 to be pushed and retracted into the inner groove 18 of the slide bar. At this time, the U-shaped connecting rod 19 will drive the limiting rod 16 to retract into the inner groove 15 of the spring, thereby releasing the limiting between the slide bar 6 and the bushing 5. Then, the bushing 5 can be unscrewed from the surface of the threaded head 4 through the thread, thus completing the disassembly and assembly of the threaded head 4, the bushing 5 and the slide bar 6.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A quick-release device for connecting rod pins of an oilfield pumping unit, comprising a pumping unit body (1), characterized in that: A crank (2) is rotatably mounted on the outside of the pumping unit body (1). A connecting rod pin (3) is movably mounted between the pumping unit body (1) and the crank (2). A threaded head (4) is fixedly mounted on the side of the connecting rod pin (3) near the pumping unit body (1). A bushing (5) is threadedly connected to the outer surface of the threaded head (4). A slide bar (6) is movably mounted inside the bushing (5). A strike plate (11) is fixedly mounted on the outer end of the slide bar (6). A handle (12) is fixedly mounted on the outer end of the strike plate (11). A sliding hammer (8) is slidably mounted on the surface of the slide bar (6).

2. The quick-release device for connecting rod pins of an oilfield pumping unit according to claim 1, characterized in that: The inner side of the bushing (5) is provided with a threaded groove (13), which is threaded to the surface of the threaded head (4). The inner wall surface of the threaded groove (13) is provided with four limiting grooves (14).

3. The quick-release device for connecting rod pins of an oilfield pumping unit according to claim 2, characterized in that: The slide bar (6) has four spring grooves (15) on the side near the bushing (5). Limiting rods (16) are slidably installed inside each of the spring grooves (15), and the limiting rods (16) are movably inserted into the limiting grooves (14).

4. The quick-release device for connecting rod pins of an oilfield pumping unit according to claim 3, characterized in that: A compression spring (17) is movably installed between the limiting rod (16) and the inside of the spring groove (15). One end of the compression spring (17) is connected to the limiting rod (16), and the other end of the compression spring (17) is connected to the inner wall of the spring groove (15).

5. The quick-release device for connecting rod pins of an oilfield pumping unit according to claim 4, characterized in that: The spring groove (15) is provided with a slide bar inner groove (18) inside. The end of the limiting rod (16) is fixedly installed with a U-shaped connecting rod (19). The U-shaped connecting rod (19) is movably inserted into the slide bar inner groove (18). The other end of the U-shaped connecting rod (19) extends through the surface of the slide bar (6) to the outside of the slide bar (6). The surface of the U-shaped connecting rod (19) located on the outside of the slide bar (6) is provided with a slope (20). The U-shaped connecting rod (19) is movably inserted into the inside of the compression spring (17).

6. The quick-release device for connecting rod pins of an oilfield pumping unit according to claim 1, characterized in that: A handrail (10) is fixedly installed on the outer surface of the slide hammer (8). A strike head (9) is threadedly connected to the side of the slide hammer (8) near the strike plate (11). The strike head (9) is slidably installed on the surface of the slide bar (6).

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