Crank of oil pumping unit

By dividing the pumping unit crank into three parts: an upper steel plate, a middle steel plate, and a lower steel plate, and using CNC welding technology for splicing and welding, the problems of complex process and high cost of cast iron cranks in the existing technology are solved, and efficient and low-cost crank manufacturing is achieved.

CN223423976UActive Publication Date: 2025-10-10PUYANG CITY SNOWLAND GEAR MFG
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Patent Information

Application Number
CN202423231201.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-10-10
Estimated Expiration
2034-12-26

AI Technical Summary

Technical Problem

The crank of the existing beam pumping unit is made of cast iron, which has a complicated process and wastes metal, thereby increasing the manufacturing cost.

Method used

The crank is divided into three parts: upper steel plate, middle steel plate and lower steel plate. They are welded using CNC welding equipment, and produced separately using special tools and tooling. The crank is then completed by splicing and welding.

Benefits of technology

It reduces the preparation process requirements, saves more than 50% of processing time, reduces costs, and improves processing efficiency and stability.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223423976U_ABST
    Figure CN223423976U_ABST
Patent Text Reader

Abstract

The utility model provides a crank of a pumping unit. The pumping unit crank comprises a lower steel plate; the middle steel plate is arranged at the top of the lower steel plate, an upper steel plate is arranged at the top of the middle steel plate, connecting blocks are fixedly connected to one end of the middle steel plate, one end of the lower steel plate and one end of the upper steel plate, and through butt-joint openings are formed in one faces of the connecting blocks; square openings are formed in the positions, close to the other ends, of the bottoms of the middle steel plate, the lower steel plate and the upper steel plate, mounting grooves are formed in the positions, close to the front face and the back face, of the adjacent faces of the lower steel plate and the upper steel plate, the first connecting plate is arranged at the bottom of the lower steel plate, and the second connecting plate is arranged at the top of the upper steel plate. According to the crank of the oil pumping unit, on the premise that machining quality is guaranteed through the design, machining time is saved by more than 50%, the upper steel plate, the middle steel plate and the lower steel plate which are assembled together are assembled and welded through numerical control blanking, time and labor are saved, and cost is reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of pumping unit cranks, in particular to a pumping unit crank. Background Art

[0002] The oil pumping unit is a kind of machine equipment for oil extraction, commonly known as the kowtow machine. The oil pumping unit is the most important lifting equipment in the rod pumping system. Depending on whether it has a walking beam, it can be divided into a walking beam type oil pumping unit and a non-walking beam type oil pumping unit.

[0003] The pumping unit is mainly composed of the walking beam part, the support part, the reducer part and the power distribution part. The working principle of the walking beam pumping unit is that the motor transmits the high-speed power to the crank through the pulley, the reducer, etc., thereby driving the connecting rod, the walking beam and the donkey head to reciprocate up and down around the central axis of the support.

[0004] The crank of the existing walking beam pumping unit is made of cast iron material cast in a foundry. However, with the continuous improvement of the economic requirements of mechanical oil production in oil fields, using cast iron material entirely for the crank will waste a lot of iron resources. Not only is the manufacturing process complicated, but it also consumes a lot of metal materials and has a high manufacturing cost.

[0005] Therefore, it is necessary to provide a pumping unit crank to solve the above technical problems. Utility Model Content

[0006] The utility model provides an oil pump crank, which solves the problem that the oil pump crank cast as cast iron material not only has a complicated manufacturing process but also wastes a lot of metal materials and increases the manufacturing cost.

[0007] In order to solve the above technical problems, the utility model provides an oil pumping unit crank comprising: a lower steel plate;

[0008] An intermediate steel plate, the intermediate steel plate being arranged on the top of the lower steel plate, an upper steel plate being arranged on the top of the intermediate steel plate, one end of each of the intermediate steel plate, the lower steel plate and the upper steel plate being fixedly connected to a connecting block, one side of each of the connecting blocks being provided with a through docking port, a square opening being provided at the bottom of each of the intermediate steel plate, the lower steel plate and the upper steel plate near the other end, and a mounting groove being provided at the position near the front and back sides of the adjacent sides of the lower steel plate and the upper steel plate;

[0009] A first connecting plate is provided at the bottom of the lower steel plate, and a second connecting plate is provided on the top of the upper steel plate;

[0010] A part of the docking interface is opened on one side of the middle steel plate, the lower steel plate and the upper steel plate to facilitate the docking of the crank and other structures. The square opening passes through the middle steel plate, the lower steel plate and the upper steel plate. The connecting block and the middle steel plate, the lower steel plate and the upper steel plate are integrated. Holes are opened on the second connecting plate and the first connecting plate to facilitate the connection of the crank and other structures.

[0011] Preferably, the top of the middle steel plate is flush with a side adjacent to the mounting groove, and the middle steel plate, the lower steel plate and the upper steel plate are all made of steel.

[0012] Preferably, the lower steel plate and the upper steel plate are each provided with four mounting openings on their opposite sides, and one side of the inner wall of the mounting opening is provided with a through hole;

[0013] The positions where the openings are opened on the lower steel plate and the upper steel plate are also opened on both sides of the middle steel plate.

[0014] Preferably, a bolt is installed at the bottom of the lower steel plate from the position of the installation port, and a nut is threadedly connected to the outer surface of the bolt near the other end;

[0015] The nut is located in the mounting hole at the top of the upper steel plate, and the bolt is inserted from the bottom of the lower steel plate and passes through the mounting hole at the top of the upper steel plate.

[0016] Preferably, the adjacent sides of the lower steel plate and the upper steel plate are provided with butt joint grooves near both ends, and the butt joint grooves are square;

[0017] The docking groove is formed integrally with the lower steel plate and the upper steel plate.

[0018] Preferably, two second clamping blocks are fixedly connected to the top of the middle steel plate near both sides, and two first clamping blocks are fixedly connected to the bottom of the middle steel plate near both ends;

[0019] The first clamping block is clamped into the docking groove on the top of the lower steel plate, and the second clamping block is clamped into the docking groove on the bottom of the upper steel plate.

[0020] Compared with the related art, the pumping unit crank provided by the present invention has the following beneficial effects:

[0021] The utility model provides a crank for an oil pumping unit. In order to reduce the difficulty and cost of manufacturing the crank, the crank is divided into three parts: an upper steel plate, a middle steel plate and a lower steel plate, so that the three parts of the crank can be manufactured separately, which reduces the requirements for the preparation process. At the same time, the upper steel plate, the middle steel plate and the lower steel plate are welded by numerical control welding equipment. In actual use, special tools and tooling are used to separately manufacture the upper steel plate, the middle steel plate and the lower steel plate. After the manufacturing is completed, it is only necessary to splice the upper steel plate, the middle steel plate and the lower steel plate, and then weld the joints of the upper steel plate, the middle steel plate and the lower steel plate to complete the manufacturing of the crank. Through this design, while ensuring the processing quality, the processing time can be saved by more than 50%, and the upper steel plate, the middle steel plate and the lower steel plate that are assembled together are finally welded by numerical control cutting, which saves time and labor and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a first embodiment of the pumping unit crank provided by the utility model;

[0023] Figure 2 Provides a structural schematic diagram of the second connecting plate for the utility model;

[0024] Figure 3 Provides a structural diagram of the middle steel plate for the utility model;

[0025] Figure 4 A schematic structural diagram of a second embodiment of the pumping unit crank provided by the present utility model;

[0026] Figure 5 Provides a structural diagram of the docking groove for the utility model;

[0027] Figure 6 Provided for the utility model Figure 5 An enlarged view of point A is shown.

[0028] Numbers in the figure: 1. Lower steel plate, 2. First connecting plate, 3. Square opening, 4. Connecting block, 5. Docking port, 6. Mounting groove, 7. Middle steel plate, 8. Second connecting plate, 9. Upper steel plate, 10. Mounting port, 11. Bolt, 12. Through port, 13. Docking groove, 14. First clamping block, 15. Second clamping block, 16. Nut. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0030] First embodiment

[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 ,in, Figure 1 A structural schematic diagram of a first embodiment of the pumping unit crank provided by the utility model; Figure 2 Provides a structural schematic diagram of the first connecting plate for the utility model; Figure 3 The utility model provides a structural diagram of the middle steel plate. The pumping unit crank comprises: a lower steel plate 1;

[0032] An intermediate steel plate 7 is provided on the top of the lower steel plate 1. An upper steel plate 9 is provided on the top of the intermediate steel plate 7. One end of the intermediate steel plate 7, the lower steel plate 1 and the upper steel plate 9 are fixedly connected to a connecting block 4. A through-interface 5 is provided on one side of the connecting block 4. A square opening 3 is provided on the bottom of the intermediate steel plate 7, the lower steel plate 1 and the upper steel plate 9 near the other end. A mounting groove 6 is provided on the adjacent side of the lower steel plate 1 and the upper steel plate 9 near the front and back sides.

[0033] A first connecting plate 2 is provided at the bottom of the lower steel plate 1 , and a second connecting plate 8 is provided on the top of the upper steel plate 9 ;

[0034] A part of the opening of the docking port 5 is located on one side of the middle steel plate 7, the lower steel plate 1 and the upper steel plate 9, which is convenient for docking the crank with other structures. The square opening 3 passes through the middle steel plate 7, the lower steel plate 1 and the upper steel plate 9. The connecting block 4 and the middle steel plate 7, the lower steel plate 1 and the upper steel plate 9 are integrated. Holes are opened on the second connecting plate 8 and the first connecting plate 2 to facilitate the connection of the crank with other structures. The connection between the middle steel plate 7, the lower steel plate 1 and the upper steel plate 9 is connected by welding.

[0035] The top of the middle steel plate 7 is flush with the adjacent side of the mounting groove 6. The middle steel plate 7, the lower steel plate 1 and the upper steel plate 9 are all made of steel.

[0036] The position and shape of the middle steel plate 7 are referenced Figure 2 and Figure 3 .

[0037] The working principle of the oil pumping unit crank provided by the utility model is as follows:

[0038] The crank is divided into three parts: an upper steel plate 9, a middle steel plate 7 and a lower steel plate 1, so that the three parts of the crank can be manufactured separately, reducing the requirements for the preparation process. At the same time, the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1 are welded by CNC welding equipment. In actual use, special tools and tooling are used to separately manufacture the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1. After the production is completed, it is only necessary to splice the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1, and then weld the joints of the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1 to complete the production of the crank.

[0039] Compared with the related art, the pumping unit crank provided by the present invention has the following beneficial effects:

[0040] In order to reduce the difficulty and cost of crank production, the crank is divided into three parts: an upper steel plate 9, an intermediate steel plate 7 and a lower steel plate 1, so that the three parts of the crank can be produced separately, reducing the requirements for the preparation process. At the same time, the upper steel plate 9, the intermediate steel plate 7 and the lower steel plate 1 are welded by CNC welding equipment. In actual use, special tools and tooling are used to separately produce the upper steel plate 9, the intermediate steel plate 7 and the lower steel plate 1. After production is completed, it is only necessary to splice the upper steel plate 9, the intermediate steel plate 7 and the lower steel plate 1, and then weld the joints of the upper steel plate 9, the intermediate steel plate 7 and the lower steel plate 1 to complete the production of the crank. This design saves more than 50% of the processing time while ensuring the processing quality, and finally uses CNC cutting to weld the assembled upper steel plate 9, the intermediate steel plate 7 and the lower steel plate 1, saving time and effort and reducing costs.

[0041] Second embodiment

[0042] Please refer to Figure 4-Figure 5 - Figure 6 , Figure 4 The second embodiment of the pumping unit crank provided by the utility model is shown in the structure diagram; Figure 5 The structure diagram of the docking interface provided by the utility model is shown in the structure diagram; Figure 6 The second embodiment of the pumping unit crank provided by the utility model is shown in the structure diagram; Figure 5 The second embodiment of the pumping unit crank provided by the utility model is shown in the structure diagram;

[0043] Specifically, the difference between the pumping unit crank provided by the second embodiment of the utility model is that four installation openings 10 are formed on the opposite side of the lower steel plate 1 and the upper steel plate 9, and a through hole 12 is formed on one side of the inner wall of the installation opening 10;

[0044] The position of the through hole 12 formed on the lower steel plate 1 and the upper steel plate 9 is also formed on the two sides of the middle steel plate 7, and the through hole 12 facilitates the connection of the middle steel plate 7, the lower steel plate 1 and the upper steel plate 9 by the bolt 11.

[0045] The bottom of the lower steel plate 1 is provided with a bolt 11 from the position of the installation opening 10, and the outer surface of the bolt 11 is threadedly connected with a nut 16 near the other end;

[0046] The nut 16 is located in the installation opening 10 on the top of the upper steel plate 9, and the bolt 11 is inserted from the bottom of the lower steel plate 1 and passes through the installation opening 10 on the top of the upper steel plate 9.

[0047] The opposite side of the lower steel plate 1 and the upper steel plate 9 is provided with a docking groove 13 near the two ends, and the docking groove 13 is square;

[0048] The position of the docking groove 13 corresponds to the position of the through hole 12, and the docking groove 13 is integrally formed with the lower steel plate 1 and the upper steel plate 9.

[0049] The top of the middle steel plate 7 is fixedly connected with two second clamping blocks 15 near the two sides, and the bottom of the middle steel plate 7 is fixedly connected with two first clamping blocks 14 near the two ends;

[0050] The first clamping block 14 is clamped into the docking groove 13 on the top of the lower steel plate 1, the second clamping block 15 is clamped into the docking groove 13 on the bottom of the upper steel plate 9, and the first clamping block 14 and the second clamping block 15 are integrally formed with the middle steel plate 7.

[0051] Compared with the related art, the pumping unit crank provided by the present invention has the following beneficial effects:

[0052] In order to increase the stability and strength of the connection between the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1, two mounting openings 10 are provided on the opposite sides of the upper steel plate 9 and the lower steel plate 1. Then, a through-hole 12 corresponding to the position of the mounting opening 10 is provided on one side of the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1 to facilitate the passage of the bolt 11. The upper steel plate 9, the middle steel plate 7 and the lower steel plate 1 can be connected together with the nut 16 to increase the stability. Two second clamping blocks 15 are installed on the top of the middle steel plate 7. At the same time, two second clamping blocks 15 are installed on the middle steel plate 7. Two first clamping blocks 14 are also installed at the bottom of 7. During the splicing process of the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1, the second clamping block 15 is clamped into the two docking grooves 13 at the bottom of the upper steel plate 9, and the first clamping block 14 is clamped into the two docking grooves 13 at the top of the lower steel plate 1. Through this design, the clamping blocks and the docking grooves 13 can be used to increase the stability and toughness of the connection between the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1, and at the same time, the upper steel plate 9, the middle steel plate 7 and the lower steel plate 1 are reinforced with the bolts 11 and the nuts 16.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A crank for an oil pump, characterized in that: include: Lower steel plate; An intermediate steel plate, the intermediate steel plate being arranged on the top of the lower steel plate, an upper steel plate being arranged on the top of the intermediate steel plate, one end of each of the intermediate steel plate, the lower steel plate and the upper steel plate being fixedly connected to a connecting block, one side of each of the connecting blocks being provided with a through docking port, a square opening being provided at the bottom of each of the intermediate steel plate, the lower steel plate and the upper steel plate near the other end, and a mounting groove being provided at the position near the front and back sides of the adjacent sides of the lower steel plate and the upper steel plate; A first connecting plate is provided at the bottom of the lower steel plate, and a second connecting plate is provided on the top of the upper steel plate.

2. The pumping unit crank according to claim 1, characterized in that: The top of the middle steel plate is flush with a side adjacent to the mounting groove, and the middle steel plate, the lower steel plate and the upper steel plate are all made of steel.

3. The pumping unit crank according to claim 1, characterized in that: Four installation openings are respectively provided on the opposite sides of the lower steel plate and the upper steel plate, and a through hole is respectively provided on one side of the inner wall of the installation opening.

4. The pumping unit crank according to claim 1, characterized in that: A bolt is installed at the bottom of the lower steel plate from the position of the installation port, and a nut is threadedly connected to the outer surface of the bolt near the other end.

5. The pumping unit crank according to claim 1, characterized in that: A butt joint groove is provided at positions near both ends of the adjacent sides of the lower steel plate and the upper steel plate, and the butt joint groove is square.

6. The pumping unit crank according to claim 1, characterized in that: Two second clamping blocks are fixedly connected to the top of the middle steel plate near both sides, and two first clamping blocks are fixedly connected to the bottom of the middle steel plate near both ends.