Isolation assembly for preventing leakage of reduction gearbox of oil pumping unit

Abstract

The invention discloses an isolation assembly for preventing leakage of a reduction gearbox of an oil pumping unit, which comprises the reduction gearbox of the oil pumping unit and a rotating shaft, and is characterized in that the reduction gearbox of the oil pumping unit and the rotating shaft are sealed through a bow-shaped sealing rubber ring; the outer side of the rotating shaft is movably sleeved with an annular structure formed by sequentially connecting a plurality of sets of sealing main plates and connecting ring sections in an annular column shape in a staggered mode, one side of each sealing main plate is slidably connected with an abutting ring inner arc block, the center of the top face of each abutting ring inner arc block is fixedly connected with a telescopic sleeve rod, and the top end of the outer side of each telescopic sleeve rod is fixedly sleeved with a sliding sleeve block. A telescopic penetrating rod is telescopically connected into the telescopic sleeve rod, and the top end of the telescopic penetrating rod is fixedly connected with an abutting ring outer arc block. The abutting ring inner arc block and the abutting ring outer arc block can adjust pressing force in a self-adaptive mode through an elastic structure composed of the telescopic sleeve rod, the sliding sleeve block, the telescopic penetrating rod and the out-of-shaft spring when the rotating shaft operates and oil impacts the bow-shaped sealing rubber ring, the sealing effect is greatly enhanced, and oil leakage can be more effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing equipment, and specifically to an isolation assembly for preventing leakage of a pumping unit reduction gearbox. Background Art

[0002] A pumping unit is a common mechanical device for oil extraction and is the main lifting equipment in a rod pumping system. It is used in conjunction with sucker rods and a submersible pump to lift crude oil from underground to the ground. The reduction gearbox of the pumping unit is an important component. Its main function is to reduce the high speed of the motor to a low speed suitable for the operation of the pumping unit, and at the same time increase the torque to drive the crank-link mechanism of the pumping unit, driving the sucker rod and the submersible pump to reciprocate up and down to achieve oil extraction. Oil leakage in the reduction gearbox of the pumping unit is a common problem. The mechanical seal device is one of the effective means to prevent oil leakage and isolate it. The device mainly consists of a dynamic ring, a static ring, an elastic element, an auxiliary seal, etc.

[0003] The existing Chinese patent document CN222315869U discloses a sealing device for preventing oil leakage in a pumping unit reduction gearbox, including: an equipment rotating shaft and a reduction gearbox body. The reduction gearbox body is arranged on the equipment rotating shaft, and the equipment rotating shaft and the reduction gearbox body are sealed by a sealing rubber strip. A receiving box is arranged on the surface of the reduction gearbox body, and a plurality of receiving grooves are arranged on the side wall of the receiving box. A threaded rod is arranged in the inner cavity of the receiving groove; for the sealing device for preventing oil leakage in the pumping unit reduction gearbox provided by this patent, after twisting the threaded rod, the threaded sleeve can be driven to move. During the movement of the threaded sleeve, by using the connection between the connecting rod and the connecting plate, the abutting plate can be driven to move. When the abutting plate abuts against the surface of the sealing rubber strip, the sealing rubber strip is squeezed, and with the self-locking property between the threaded sleeve and the threaded rod, the stability during the sealing process can be improved; however, the sealing device for preventing oil leakage in the pumping unit reduction gearbox still has deficiencies: it only strengthens the sealed connection between the sealing rubber strip and the equipment rotating shaft, but in actual situations, there is also a problem of insufficient sealing between the sealing rubber strip and the reduction gearbox body. The single-sided sealing and pressing structure is difficult to meet the actual use requirements, reducing the overall sealing performance of the structure. Summary of the Invention

[0004] The purpose of the present invention is to: solve the problem that in the above-mentioned sealing device for preventing oil leakage in a pumping unit reduction gearbox, it only strengthens the sealed connection between the sealing rubber strip and the equipment rotating shaft, but in actual situations, there is also a problem of insufficient sealing between the sealing rubber strip and the reduction gearbox body. The single-sided sealing and pressing structure is difficult to meet the actual use requirements, reducing the overall sealing performance of the structure, and provide an isolation assembly for preventing leakage of a pumping unit reduction gearbox.

[0005] To achieve the above object, the present invention provides the following technical solution: An isolation assembly for preventing leakage of a pumping unit reduction gearbox, comprising: a pumping unit reduction gearbox and a rotating shaft. It is characterized in that a rotating shaft is arranged at the output end of the pumping unit reduction gearbox, and an arcuate sealing rubber ring is used for sealing between the pumping unit reduction gearbox and the rotating shaft. An annular structure composed of a plurality of groups of sealing main boards and connecting ring segments connected in an alternating manner in a ring column shape is movably sleeved outside the rotating shaft. One side of the sealing main board is slidably connected with an inner arc block of the abutting ring. The center of the top surface of the inner arc block of the abutting ring is fixedly connected with a telescopic sleeve rod. A sliding sleeve block is fixedly sleeved at the outer top end of the telescopic sleeve rod. A telescopic through rod is telescopically connected inside the telescopic sleeve rod. The top end of the telescopic through rod is fixedly connected with an outer arc block of the abutting ring. A threaded groove is opened at the center of the outer side of the sealing main board. An installation bolt is screwed inside the threaded groove. An installation clamping plate is rotatably sleeved outside the installation bolt. One end of the installation clamping plate is provided with a bolt groove for the installation bolt to pass through.

[0006] As a further scheme of the present invention: The arcuate sealing rubber ring is set as a circular rubber ring structure with an arcuate cross-section, and one end of the outer side surface of the outer ring of the arcuate sealing rubber ring is fixedly connected with an anti-detachment edge ring one, and one end of the outer side surface of the inner ring of the arcuate sealing rubber ring is fixedly connected with an anti-detachment edge ring two.

[0007] As a further scheme of the present invention: A sliding sleeve block is fixedly sleeved at the outer top end of the telescopic sleeve rod. A same-axis outer spring is fixedly connected perpendicular to the top surface of the sliding sleeve block and the bottom surface of the outer arc block of the abutting ring, and the coaxial outer spring is sleeved outside the telescopic through rod. The inner arc block of the abutting ring and the outer arc block of the abutting ring are elastically connected through the telescopic sleeve rod, the sliding sleeve block, the telescopic through rod and the coaxial outer spring. The inner arc block of the abutting ring and the outer arc block of the abutting ring are located inside the arcuate sealing rubber ring and the edge of the arcuate sealing rubber ring is pressed tightly through the elastic connection relationship to increase the sealing.

[0008] As a further scheme of the present invention: A sliding groove is opened on one side of the sealing main board. Two groups of adjusting grooves are symmetrically opened at one end of the sliding sleeve block. Two groups of adjusting rods are telescopically connected inside the two groups of adjusting grooves. The same sliding block is fixedly connected to the same ends of the two groups of adjusting rods. The sliding block is adapted to the sliding groove in specification. Anti-detachment rings one are fixedly sleeved at the other ends of the two groups of adjusting rods. Anti-detachment rings two with the same specification as the anti-detachment rings one are fixedly connected to the inner sides of the two groups of adjusting grooves near the outer ends.

[0009] As a further scheme of the present invention: The installation bolt is passed through one end of the installation clamping plate through the bolt groove structure. Two groups of limiting rings are fixedly sleeved in parallel near the top of the installation bolt. The installation bolt restricts the state of passing through the inside of the bolt groove by clamping the installation clamping plate through the two groups of limiting rings. An anti-slip rubber pad is closely adhered to the inner side of the installation clamping plate.

[0010] As a further solution of the present invention: A reinforcing collar for increasing the connection stability between the mounting splint and the pumping unit reduction gearbox is sleeved outside the mounting splint. One end of the inner side of the reinforcing collar is fixedly connected with a first collar telescopic rod. The outer side of the first collar telescopic rod is telescopically connected with a second collar telescopic rod. A spring abutting ring is fixedly sleeved on the outer side of the end of the second collar telescopic rod. An external spring is fixedly connected between one end of the inner side of the reinforcing collar and the spring abutting ring, and the external spring is simultaneously sleeved outside the first collar telescopic rod and the second collar telescopic rod.

[0011] As a further solution of the present invention: Each of the several groups of sealing main boards is provided with the same number and specifications of sliding grooves, inner arc abutting blocks, telescopic sleeve rods, sliding sleeve blocks, telescopic through rods, outer arc abutting blocks, external shaft springs, adjustment grooves, adjustment rods, sliding blocks, anti-disengagement rings one, anti-disengagement rings two, threaded grooves, mounting bolts, mounting splints, bolt grooves, limiting rings and anti-slip rubber pads.

[0012] As a further solution of the present invention: The reinforcing collar is sleeved outside several groups of mounting splints arranged in a ring. Two symmetrical positioning groove structures are opened on the outer sides of the several groups of mounting splints. The positioning grooves are adapted to the specifications of the spring abutting rings. The first collar telescopic rod, the second collar telescopic rod, the spring abutting ring and the external spring structures connected to the inner side of the reinforcing collar are all arranged in its radial direction, and the number of each is several groups and is adapted to the number and position of the positioning grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, an arcuate sealing rubber ring is adopted. Its unique arcuate circular rubber ring structure, the anti-disengagement edge ring one on the outer side of the outer ring and the anti-disengagement edge ring two on the outer side of the inner ring can accurately position and firmly seal, effectively preventing the displacement of the rubber ring. At the same time, the inner arc abutting block and the outer arc abutting block form an elastic structure through the telescopic sleeve rod, the sliding sleeve block, the telescopic through rod and the external shaft spring. When the rotating shaft is operating and the oil impacts the arcuate sealing rubber ring, the pressing force can be adaptively adjusted, greatly enhancing the sealing effect and being able to more effectively prevent oil leakage.

[0015] 2. One side of the sealing main board in the present invention is slidably connected with the inner arc abutting block. The inner arc abutting block is connected to the outer arc abutting block through a series of structures. The sliding connection structure facilitates the flexible adjustment of the positions of the inner arc abutting block and the outer arc abutting block, ensuring that the equipment adapts to the sealing requirements between different diameter specifications of the rotating shaft and the pumping unit reduction gearbox within a certain range. The sliding sleeve block and the sliding block are movably telescopically connected by means of the adjustment rod and the adjustment groove, and the anti-disengagement rings one and two ensure the stable connection, enabling the equipment to flexibly adjust the distance that the inner arc abutting block and the outer arc abutting block extend out of the sealing main board and accurately snap them into the inner part of the arcuate sealing rubber ring according to the actual situation to ensure tight sealing.

[0016] 3. In the present invention, through structures such as mounting splints, mounting bolts, and reinforcement collar rings, the connection stability is significantly improved. The mounting splint can achieve a stable connection with adjustable spacing to the sealing main board through the mounting bolt and the thread groove structure, so as to adapt to the installation requirements of the output section of pumping unit speed reducers with different specifications. The collar telescopic rod I, collar telescopic rod II, spring abutment ring, and external spring inside the reinforcement collar ring work together to further reinforce and fix the mounting splint, prevent the mounting splint from loosening, and maintain the stability of the entire mechanical seal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0018] Figure 2 is the structural schematic diagram of the contact between the pumping unit seal box and the rotating shaft in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0019] Figure 3 is the structural schematic diagram of the cross-section of an arc-shaped sealing rubber ring in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0020] Figure 4 is the structural schematic diagram of a reinforcement collar ring in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0021] Figure 5 is the structural schematic diagram of the enlarged view at position A in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0022] Figure 6 is the structural schematic diagram of a mounting splint in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0023] Figure 7 is the structural schematic diagram of a sliding groove in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0024] Figure 8 is the structural schematic diagram of a counter ring inner arc block in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention;

[0025] Figure 9 is the structural schematic diagram of a sliding block in an isolation assembly for preventing leakage of a pumping unit speed reducer according to the present invention.

[0026] In the figure: 1. Pump jack speed reducer; 2. Rotating shaft; 3. Bow-shaped sealing rubber ring; 4. Anti-disengagement edge ring I; 5. Anti-disengagement edge ring II; 6. Sealing main board; 7. Connecting ring section; 8. Sliding groove; 9. Inner arc block of the abutting ring; 10. Telescopic sleeve rod; 11. Sliding sleeve block; 12. Telescopic through rod; 13. Outer arc block of the abutting ring; 14. Spring outside the shaft; 15. Adjusting groove; 16. Adjusting rod; 17. Sliding block; 18. Anti-disengagement ring I; 19. Anti-disengagement ring II; 20. Thread groove; 21. Installation bolt; 22. Installation splint; 23. Bolt groove; 24. Limiting ring; 25. Anti-slip rubber pad; 26. Reinforcing sleeve ring; 27. First telescopic rod of the sleeve ring; 28. Second telescopic rod of the sleeve ring; 29. Spring abutting ring; 30. Spring outside the machine; 31. Positioning groove. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0029] Refer to Figures 1 to 9, in the embodiment of the present invention, an isolation assembly for preventing leakage of a pumping unit reduction gearbox includes a pumping unit reduction gearbox 1 and a rotating shaft 2. It is characterized in that a rotating shaft 2 is arranged at the output end of the pumping unit reduction gearbox 1, and the pumping unit reduction gearbox 1 and the rotating shaft 2 are sealed by an arc-shaped sealing rubber ring 3. An annular structure composed of a plurality of groups of sealing main plates 6 and connecting ring segments 7 connected in an alternating manner in a ring array is movably sleeved outside the rotating shaft 2. One side of the sealing main plate 6 is slidably connected with an inner arc block 9 of the abutting ring. The center of the top surface of the inner arc block 9 of the abutting ring is fixedly connected with a telescopic sleeve rod 10. A sliding sleeve block 11 is fixedly sleeved at the outer top end of the telescopic sleeve rod 10. A telescopic through rod 12 is telescopically connected inside the telescopic sleeve rod 10. The top end of the telescopic through rod 12 is fixedly connected with an outer arc block 13 of the abutting ring. A threaded groove 20 is opened at the center of the outer side of the sealing main plate 6. An installation bolt 21 is screwed inside the threaded groove 20. An installation clamping plate 22 is rotatably sleeved outside the installation bolt 21. One end of the installation clamping plate 22 is provided with a bolt groove 23 for the installation bolt 21 to pass through.

[0030] Referring to Figures 1 to 3 , the arc-shaped sealing rubber ring 3 is set as a circular rubber ring structure with an arc-shaped cross-section, and one end of the outer side surface of the outer ring of the arc-shaped sealing rubber ring 3 is fixedly connected with an anti-disengagement edge ring 4, and one end of the outer side surface of the inner ring of the arc-shaped sealing rubber ring 3 is fixedly connected with an anti-disengagement edge ring 5.

[0031] Adopting the above scheme: For the sealed connection between the pumping unit reduction gearbox 1 and the rotating shaft 2, the unique arc-shaped circular rubber ring structure of the arc-shaped sealing rubber ring 3 is used to fill the space between the two to prevent oil leakage. The anti-disengagement edge ring 4 at one end of the outer side surface of the outer ring of the arc-shaped sealing rubber ring 3 hooks the edge housing at the output end of the pumping unit reduction gearbox 1 to prevent the arc-shaped sealing rubber ring 3 from completely falling into the space between the pumping unit reduction gearbox 1 and the rotating shaft 2. The anti-disengagement edge ring 5 at one end of the outer side surface of the inner ring can effectively prevent the structures of the inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring, which are elastically connected and naturally expanded, from shifting during operation, ensuring the accuracy of the sealed position.

[0032] Referring to Figures 7 to 9 , a sliding sleeve block 11 is fixedly sleeved at the outer top end of the telescopic sleeve rod 10. A same-axis outer spring 14 is perpendicularly fixedly connected between the top surface of the sliding sleeve block 11 and the bottom surface of the outer arc block 13 of the abutting ring, and the same-axis outer spring 14 is sleeved outside the telescopic through rod 12. The inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring are elastically connected through the telescopic sleeve rod 10, the sliding sleeve block 11, the telescopic through rod 12 and the same-axis outer spring 14. The inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring are located inside the arc-shaped sealing rubber ring 3 and the edge of the arc-shaped sealing rubber ring 3 is tightly pressed through the elastic connection relationship to increase the seal.

[0033] Adopting the above solution: The top surface of the sliding sleeve block 11 and the bottom surface of the outer arc block 13 of the abutting ring are elastically connected by an external shaft spring 14, and the telescopic rod 12 is telescopically connected inside the telescopic sleeve rod 10 to connect the inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring, so as to realize the function of elastically pressing the edge of the arc-shaped sealing rubber ring 3. When the rotating shaft 2 operates, the oil impacts the arc-shaped sealing rubber ring 3, and the inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring can adaptively adjust the pressing force through the elastic structure, enhance the sealing effect, and effectively prevent oil leakage.

[0034] Refer to Figures 7 to 9 , a sliding groove 8 is provided on one side of the sealing main board 6. Two sets of adjusting grooves 15 are symmetrically provided at one end of the sliding sleeve block 11. Two adjusting rods 16 are telescopically connected inside the two sets of adjusting grooves 15. The same sliding block 17 is fixedly connected to the same ends of the two adjusting rods 16. The sliding block 17 is adapted to the specification of the sliding groove 8. Anti-detachment rings 18 of the same specification are fixedly sleeved on the other ends of the two adjusting rods 16. Anti-detachment rings 19 of the same specification as the anti-detachment rings 18 are fixedly connected to the inner sides of the two sets of adjusting grooves 15 near the outer ends. A number of sealing main boards 6 are provided with the same number and specifications of sliding grooves 8, inner arc blocks 9 of the abutting ring, telescopic sleeve rods 10, sliding sleeve blocks 11, telescopic rods 12, outer arc blocks 13 of the abutting ring, external shaft springs 14, adjusting grooves 15, adjusting rods 16, sliding blocks 17, anti-detachment rings 18, anti-detachment rings 19, threaded grooves 20, mounting bolts 21, mounting clamping plates 22, bolt grooves 23, limiting rings 24 and anti-slip rubber pads 25 structures.

[0035] Adopting the above solution: The inner arc block 9 of the abutting ring is slidably connected in the sliding groove 8 on one side of the sealing main board 6. The sliding sleeve block 11 is fixedly sleeved on the outer top end of the telescopic sleeve rod 10 on the top surface of the inner arc block 9 of the abutting ring. One end of the sliding sleeve block 11 is movably connected to the sliding block 17. The sliding block 17 is adapted to the specification of the sliding groove 8, which is convenient for adapting to different gap distances between different rotating shafts 2 and the pumping unit reduction gearbox 1, so as to adjust the positions of the inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring and then snap them into the inside of the arc-shaped sealing rubber ring 3 between the rotating shaft 2 and the pumping unit reduction gearbox 1. The sliding sleeve block 11 and the sliding block 17 are connected by telescopic movement through the adjusting rod 16 and the adjusting groove 15. The anti-detachment ring 18 on the adjusting rod 16 and the anti-detachment ring 19 on the inner side of the adjusting groove 15 limit the telescopic range of the adjusting rod 16 and ensure the stable connection between the sliding sleeve block 11 and the sliding block 17, which is convenient for adjusting the positions of the inner arc block 9 of the abutting ring and the outer arc block 13 of the abutting ring inside the arc-shaped sealing rubber ring 3 according to the actual working conditions and ensuring the pressing effect of the structure on the arc-shaped sealing rubber ring 3.

[0036] Refer to Figure 6 and Figure 7, The mounting bolt 21 is passed through one end of the mounting clamping plate 22 through the bolt groove 23 structure. Two groups of limiting rings 24 are fixedly sleeved in parallel near the top of the mounting bolt 21. The mounting bolt 21 restricts the state of passing through the inside of the bolt groove 23 by clamping the mounting clamping plate 22 through the two groups of limiting rings 24. An anti-slip rubber pad 25 is closely adhered to the inner side of the mounting clamping plate 22.

[0037] Adopting the above solution: A plurality of groups of mounting clamping plates 22 arranged in a ring are closely attached to the outer side of the output section of the pumping unit reducer 1. The stability of the installation is improved through the anti-slip rubber pad 25, avoiding the annular sealing main board 6 from detaching from the close state with the output side of the pumping unit reducer 1 during equipment use. The mounting clamping plate 22 realizes a stable connection with adjustable spacing between it and the sealing main board 6 through the mounting bolt 21 and the thread groove 20 structure, facilitating the adaptation to the installation requirements of the output sections of pumping unit reducers 1 of different specifications. The two groups of limiting rings 24 near the top of the mounting bolt 21 facilitate ensuring the state of the mounting bolt 21 passing through the mounting clamping plate 22 and do not affect the rotation of the mounting bolt 21 relative to the mounting clamping plate 22.

[0038] Refer to Figures 4 to 6 , A reinforcing sleeve ring 26 for increasing the connection stability between the mounting clamping plate 22 and the pumping unit reducer 1 is sleeved outside the mounting clamping plate 22. One end of the inner side of the reinforcing sleeve ring 26 is fixedly connected with a first sleeve ring telescopic rod 27. The first sleeve ring telescopic rod 27 is telescopically connected with a second sleeve ring telescopic rod 28 on the outside. A spring abutting ring 29 is fixedly sleeved on the outside of the end of the second sleeve ring telescopic rod 28. An external spring 30 is fixedly connected between one end of the inner side of the reinforcing sleeve ring 26 and the spring abutting ring 29, and the external spring 30 is simultaneously sleeved outside the first sleeve ring telescopic rod 27 and the second sleeve ring telescopic rod 28. The reinforcing sleeve ring 26 is sleeved outside a plurality of groups of mounting clamping plates 22 arranged in a ring. Two groups of symmetric positioning groove 31 structures are opened on the outside of each group of mounting clamping plates 22. The positioning groove 31 is adapted to the specification of the spring abutting ring 29. The first sleeve ring telescopic rod 27, the second sleeve ring telescopic rod 28, the spring abutting ring 29, and the external spring 30 structures connected to the inner side of the reinforcing sleeve ring 26 are all arranged in its radial direction, and the number of each is set to be several groups and is adapted to the number and position of the positioning groove 31.

[0039] Adopting the above solution: The second sleeve ring telescopic rod 28 is telescopically connected to the outside of the first sleeve ring telescopic rod 27 at one end of the inner side of the reinforcing sleeve ring 26. The spring abutting ring 29 at the end of the second sleeve ring telescopic rod 28 is connected to the inner side of the reinforcing sleeve ring 26 through the external spring 30, facilitating maintaining the natural tension of the first sleeve ring telescopic rod 27 and the second sleeve ring telescopic rod 28 and driving the spring abutting ring 29 to tightly press into the positioning groove 31 on the outside of the mounting clamping plate 22 to further reinforce the convergence of a plurality of groups of mounting clamping plates 22 arranged in a ring. When the pumping unit works and generates vibrations, the external spring 30 can adaptively buffer the vibrations through the spring abutting ring 29 and the positioning groove 31 structure, avoiding the loosening of the mounting clamping plate 22 and improving the stability of the entire mechanical seal structure.

[0040] The working principle of the present invention is as follows: During use, there is a sealed connection between the pumping unit speed reducer 1 and the rotating shaft 2. The unique arcuate circular rubber ring structure of the arcuate sealing rubber ring 3 is used to fill the space between the two to prevent oil leakage. The anti-disengagement ring one 4 at one end of the outer side of the outer ring of the arcuate sealing rubber ring 3 hooks the edge housing at the output end of the pumping unit speed reducer 1 to prevent the arcuate sealing rubber ring 3 from completely falling into the space between the pumping unit speed reducer 1 and the rotating shaft 2. The anti-disengagement ring two 5 at one end of the inner side of the inner ring can effectively prevent the structures of the inner arc block 9 and the outer arc block 13 of the abutting ring that are elastically connected and naturally expanded from shifting during operation, ensuring the accuracy of the sealing position;

[0041] The annular structure sleeved outside the rotating shaft 2 is composed of several groups of sealing main boards 6 and connecting ring segments 7 connected in an alternating manner in a ring shape. The inner arc block 9 of the abutting ring is slidably connected in the sliding groove 8 on one side of the sealing main board 6. The outer top end of the telescopic sleeve rod 10 on the top surface of the inner arc block 9 of the abutting ring is fixedly sleeved with a sliding sleeve block 11. One end of the sliding sleeve block 11 is movably connected to the sliding block 17. The sliding block 17 is adapted to the specifications of the sliding groove 8, which is convenient for adapting to different gap distances between different rotating shafts 2 and the pumping unit speed reducer 1, so as to adjust the positions of the inner arc block 9 and the outer arc block 13 of the abutting ring and then snap them into the inside of the arcuate sealing rubber ring 3 between the rotating shaft 2 and the pumping unit speed reducer 1, ensuring the tightness of the seal at the contact between the arcuate sealing rubber ring 3 and the two. The top surface of the sliding sleeve block 11 and the bottom surface of the outer arc block 13 of the abutting ring are elastically connected by an off-axis spring 14, and the telescopic through rod 12 is telescopically connected inside the telescopic sleeve rod 10 to connect the inner arc block 9 and the outer arc block 13 of the abutting ring, so as to realize the function of elastically pressing the edge of the arcuate sealing rubber ring 3 by the two. When the rotating shaft 2 operates, the oil impacts the arcuate sealing rubber ring 3, and the inner arc block 9 and the outer arc block 13 of the abutting ring can adaptively adjust the pressing force by means of the elastic structure, enhancing the sealing effect and effectively preventing oil leakage. The sliding sleeve block 11 and the sliding block 17 are connected by an adjusting rod 16 and an adjusting groove 15 to realize telescopic movement. The anti-disengagement ring one 18 on the adjusting rod 16 and the anti-disengagement ring two 19 on the inner side of the adjusting groove 15 limit the telescopic range of the adjusting rod 16 and ensure the stable connection between the sliding sleeve block 11 and the sliding block 17, facilitating the adjustment of the positions of the inner arc block 9 and the outer arc block 13 of the abutting ring inside the arcuate sealing rubber ring 3 according to the actual working conditions and ensuring the pressing effect of the structure on the arcuate sealing rubber ring 3;

[0042] A number of mounting clamping plates 22 arranged in a circular array are closely attached to the outer side of the output section of the pumping unit speed reducer 1. The anti-slip rubber pads 25 are used to improve the stability of the installation, preventing the circular sealing main board 6 from detaching from the close contact state with the output side of the pumping unit speed reducer 1 during equipment operation. The mounting clamping plates 22 are stably connected to the sealing main board 6 with adjustable spacing through the mounting bolts 21 and the thread grooves 20, facilitating the adaptation to the installation requirements of the output sections of pumping unit speed reducers 1 with different specifications. The two limiting rings 24 near the top of the mounting bolts 21 are convenient for ensuring the state of the mounting bolts 21 passing through the mounting clamping plates 22 without affecting the rotation of the mounting bolts 21 relative to the mounting clamping plates 22;

[0043] One end of the telescopic rod of the inner side of the reinforcing collar 26 is telescopically connected to the telescopic rod of the second collar 28 on the outside. A spring abutment ring 29 at the end of the telescopic rod of the second collar 28 is connected to the inner side of the reinforcing collar 26 through an external spring 30, which is convenient for maintaining the natural tension of the telescopic rod of the first collar 27 and the telescopic rod of the second collar 28, driving the spring abutment ring 29 to tightly press into the positioning groove 31 on the outside of the mounting clamping plate 22 to further reinforce the convergence of a number of mounting clamping plates 22 arranged in a circular array. When the pumping unit operates and generates vibrations, the external spring 30 can adaptively buffer the vibrations through the spring abutment ring 29 and the positioning groove 31 structure, preventing the mounting clamping plates 22 from loosening, improving the stability of the entire mechanical seal structure, continuously ensuring good sealing performance, and effectively preventing oil leakage from the pumping unit speed reducer.

[0044] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An isolation assembly for preventing leakage of a pumping unit reduction gearbox, comprising: The pumping unit reduction gearbox (1) and the rotating shaft (2), characterized in that a rotating shaft (2) is arranged at the output end of the pumping unit reduction gearbox (1), and the pumping unit reduction gearbox (1) and the rotating shaft (2) are sealed by an arcuate sealing rubber ring (3). An annular structure composed of a plurality of groups of sealing main boards (6) and connecting ring segments (7) is sleeved outside the rotating shaft (2) in a ring-shaped and staggered manner. One side of the sealing main board (6) is slidably connected with an inner arc block (9) of the abutting ring. The center of the top surface of the inner arc block (9) of the abutting ring is fixedly connected with a telescopic sleeve rod (10). A sliding sleeve block (11) is fixedly sleeved at the outer top end of the telescopic sleeve rod (10). A telescopic through rod (12) is telescopically connected inside the telescopic sleeve rod (10). The top end of the telescopic through rod (12) is fixedly connected with an outer arc block (13) of the abutting ring. A threaded groove (20) is opened at the center of the outer side of the sealing main board (6). An installation bolt (21) is screwed inside the threaded groove (20). An installation clamping plate (22) is rotatably sleeved outside the installation bolt (21). One end of the installation clamping plate (22) is provided with a bolt groove (23) for the installation bolt (21) to pass through.

2. The isolation assembly for preventing leakage of the speed reducer of the pumping unit according to claim 1, characterized in that, The arcuate sealing rubber ring (3) is set as a circular rubber ring structure with an arcuate cross-section, and an anti-detachment edge ring one (4) is fixedly connected to one end of the outer side surface of the outer ring of the arcuate sealing rubber ring (3), and an anti-detachment edge ring two (5) is fixedly connected to one end of the outer side surface of the inner ring of the arcuate sealing rubber ring (3).

3. An isolation assembly for preventing leakage of a pumping unit speed reducer according to claim 1, characterized in that, A sliding sleeve block (11) is fixedly sleeved at the outer top end of the telescopic sleeve rod (10). An outer spring (14) of the same axis perpendicular to the top surface of the sliding sleeve block (11) and the bottom surface of the outer arc block (13) of the abutting ring is fixedly connected between them, and the outer spring (14) is sleeved outside the telescopic through rod (12). The inner arc block (9) of the abutting ring and the outer arc block (13) of the abutting ring are elastically connected through the telescopic sleeve rod (10), the sliding sleeve block (11), the telescopic through rod (12) and the outer spring (14). The inner arc block (9) of the abutting ring and the outer arc block (13) of the abutting ring are located inside the arcuate sealing rubber ring (3), and the edge of the arcuate sealing rubber ring (3) is pressed tightly through the elastic connection relationship to increase the seal.

4. An isolation assembly for preventing leakage of a pumping unit speed reducer according to claim 1, characterized in that, A sliding groove (8) is opened on one side of the sealing main board (6). Two adjusting grooves (15) are symmetrically opened at one end of the sliding sleeve block (11). Two adjusting rods (16) are telescopically connected inside the two adjusting grooves (15). The same sliding block (17) is fixedly connected to the same ends of the two adjusting rods (16). The sliding block (17) is adapted to the specifications of the sliding groove (8). Anti-detachment rings one (18) are fixedly sleeved at the other ends of the two adjusting rods (16). Anti-detachment rings two (19) of the same specifications as the anti-detachment rings one (18) are fixedly connected to the inner sides of the two adjusting grooves (15) near the outer ends.

5. An isolation assembly for preventing leakage of a speed reducer of a pumping unit according to claim 1, characterized in that, The installation bolt (21) is passed through one end of the installation clamping plate (22) through the bolt groove (23) structure. Two groups of limiting rings (24) are fixedly sleeved in parallel near the top of the installation bolt (21). The installation bolt (21) restricts the state of passing through the inside of the bolt groove (23) by clamping the installation clamping plate (22) through the two groups of limiting rings (24). An anti-slip rubber pad (25) is closely adhered to the inner side of the installation clamping plate (22).

6. The isolation assembly for preventing leakage of a pumping unit speed reducer according to claim 1, characterized in that, An additional reinforcement collar (26) for increasing the connection stability between the installation clamping plate (22) and the pumping unit reduction gearbox (1) is sleeved outside the installation clamping plate (22). One end of the inner side of the reinforcement collar (26) is fixedly connected with a first collar telescopic rod (27). A second collar telescopic rod (28) is telescopically connected to the outside of the first collar telescopic rod (27). A spring abutment ring (29) is fixedly sleeved on the outside of the end of the second collar telescopic rod (28). An external spring (30) is fixedly connected between one end of the inner side of the reinforcement collar (26) and the spring abutment ring (29), and the external spring (30) is simultaneously sleeved outside the first collar telescopic rod (27) and the second collar telescopic rod (28).

7. An isolation assembly for preventing leakage of a speed reducer of a pumping unit according to claim 1, characterized in that, Each of the several groups of sealing main boards (6) is provided with the same number and specifications of sliding grooves (8), inner arc abutment blocks (9), telescopic sleeve rods (10), sliding sleeve blocks (11), telescopic through rods (12), outer arc abutment blocks (13), shaft external springs (14), adjustment grooves (15), adjustment rods (16), sliding blocks (17), anti-disengagement rings one (18), anti-disengagement rings two (19), threaded grooves (20), installation bolts (21), installation clamping plates (22), bolt grooves (23), limiting rings (24) and anti-slip rubber pads (25) structures.

8. An isolation assembly for preventing leakage of a pumping unit speed reducer, characterized in that, The reinforcement collar (26) is sleeved outside several groups of installation clamping plates (22) arranged in a ring. Two groups of symmetrical positioning grooves (31) are provided on the outside of each of the several groups of installation clamping plates (22). The positioning grooves (31) are adapted to the specifications of the spring abutment ring (29). The first collar telescopic rod (27), the second collar telescopic rod (28), the spring abutment ring (29) and the external spring (30) structures connected to the inner side of the reinforcement collar (26) are all arranged in its radial direction, and the number of each is several groups, and is adapted to the number and position of the positioning grooves (31).

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