Sealing device for preventing oil leakage of reduction gearbox of oil pumping unit

Abstract

The utility model provides a sealing device for preventing oil leakage of a reduction gearbox of an oil pumping unit. The sealing device for preventing the reduction gearbox of the oil pumping unit from leaking oil comprises an equipment rotating shaft and a reduction gearbox body, the reduction gearbox body is arranged on the equipment rotating shaft, the equipment rotating shaft and the reduction gearbox body are sealed through a sealing rubber strip, a containing box is arranged on the surface of the reduction gearbox body, and the containing box is connected with the equipment rotating shaft. A plurality of containing grooves are formed in the side wall of the containing box, and threaded rods are arranged in inner cavities of the containing grooves. According to the sealing device for preventing the reduction gearbox of the oil pumping unit from leaking oil, after the threaded rod is twisted, the threaded sleeve can be driven to move, in the moving process of the threaded sleeve, the abutting plate can be driven to move by means of connection between the connecting rod and the connecting plate, and when the abutting plate abuts against the surface of the sealing rubber strip, the sealing rubber strip is not prone to leaking oil. And in cooperation with the self-locking performance between the threaded sleeve and the threaded rod, the stability in the sealing process can be improved.

Description

Technical Field

[0001] The utility model relates to the field of sealing devices, in particular to a sealing device for preventing oil leakage from a reduction box of an oil pumping unit. Background Art

[0002] The oil pump is a special equipment for oil field production, and the reducer in the oil pump is a key component of the oil pump. During the oil field production work, the oil leakage problem of the oil pump reducer has always plagued oil field production enterprises, which is not only wasteful, but also affects production. The key to the oil leakage of the oil pump reducer is the sealing problem of the input and output shafts of the reducer. The traditional sealing method is to use sealing rings.

[0003] Chinese patent CN215831106U discloses a sealing device for preventing oil leakage from a reduction box of an oil pumping unit. The technical solution is to rotate a rotating handle to rotate a semicircular gear ring. When the semicircular gear ring rotates, it can indirectly drive the gear to rotate through meshing. When the gear rotates, it can indirectly drive the tooth plate to move through meshing. The movement of the tooth plate can indirectly drive two arc-shaped fixed plates to move in the same direction. The movement of the arc-shaped fixed plate can indirectly drive the sealing strip to move through the auxiliary fixed plate. The movement of the sealing strip can avoid the gap between the sealing strip and the equipment, thereby reducing the waste of engine oil to a certain extent and facilitating the use of the staff.

[0004] The sealing device uses gear teeth to push the rack plate to move, which drives the auxiliary fixing plate to extrude the sealing strip to reduce the gap between the sealing strip and the equipment. However, the method of using gear teeth to drive the rack plate has poor stability. The gear teeth and the rack plate are easily displaced by force, which reduces the extrusion stability of the sealing strip and the sealing effect, and is not conducive to oil leakage prevention.

[0005] Therefore, it is necessary to provide a sealing device for preventing oil leakage from the reduction box of the oil pump to solve the above technical problems. Utility Model Content

[0006] The utility model provides a sealing device for preventing oil leakage from a reduction box of an oil pumping unit, which solves the problem that the gear teeth drive the rack plate, which has poor stability, is prone to displacement of the gear teeth and the rack plate under force, and reduces the extrusion stability of the sealing strip.

[0007] In order to solve the above technical problems, the utility model provides a sealing device for preventing oil leakage from a reduction box of an oil pump, comprising a device shaft and a reduction box body, wherein the reduction box body is arranged on the device shaft, and the device shaft and the reduction box body are sealed by a sealing strip;

[0008] The surface of the reduction gearbox body is provided with a receiving box, the side wall of the receiving box is provided with a plurality of receiving grooves, the inner cavity of the receiving groove is provided with a threaded rod, the surface of the threaded rod is threadedly connected with a threaded sleeve, the surface of the threaded sleeve is fixedly connected with a connecting rod, the inner end of the connecting rod is fixedly connected with a connecting plate, and the surface of the connecting plate is fixedly connected with a contact plate capable of contacting the surface of the sealing strip;

[0009] The outer end of the threaded rod can be rotatably extended to the outside of the accommodating box, and the surface of the accommodating groove is provided with a clamping structure capable of locking the threaded rod.

[0010] Preferably, the clamping structure includes a positioning rod and a ratchet, the ratchet is fixedly connected to the outer end of the threaded rod surface, the positioning rod is fixedly connected to the top of the outer surface of the accommodating groove, and the surface of the positioning rod is rotatably provided with a pawl adapted to the ratchet.

[0011] Preferably, the outer end of the threaded rod is fixedly connected to a twist handle, and the surface of the twist handle is provided with anti-slip grooves.

[0012] Preferably, a guide rod is fixedly connected to the inner wall surface of the accommodating groove, a limiting sleeve is fixedly connected to the surface of the connecting rod, and the limiting sleeve can be slidably sleeved on the surface of the guide rod.

[0013] Preferably, a plurality of mounting blocks are fixedly connected to the surface of the reduction box body, and the mounting blocks are detachably connected to the accommodating box via bolts.

[0014] Preferably, the plurality of accommodating grooves are evenly distributed and arranged in a ring shape along the side wall of the accommodating box.

[0015] Compared with the related art, the sealing device for preventing oil leakage of the reduction box of the pumping unit provided by the utility model has the following beneficial effects:

[0016] The utility model provides a sealing device for preventing oil leakage from a reduction box of an oil pumping unit. The threaded sleeve can be driven to move by twisting the threaded rod. During the movement of the threaded sleeve, the connection between the connecting rod and the connecting plate can be used to drive the contact plate to move. When the contact plate contacts the surface of the sealing strip, the sealing strip is squeezed to avoid a gap between the sealing strip and the equipment. The self-locking property between the threaded sleeve and the threaded rod can improve the stability during the sealing process. After the contact plate contacts the surface of the sealing strip, the pawl contacts the surface of the ratchet wheel to lock the threaded rod after rotation, thereby locking the threaded rod and locking the working position of the contact plate. The stability during the sealing process is improved, the sealing effect is improved, and the use is beneficial to preventing oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A structural schematic diagram of a preferred embodiment of a sealing device for preventing oil leakage from a reduction box of an oil pumping unit provided by the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the containing box and the sealing strip shown;

[0019] Figure 3 for Figure 1 A schematic structural diagram of the clamping structure is shown.

[0020] Numbers in the figure: 1. Equipment shaft; 2. Reducer body; 3. Receiving box; 4. Receiving groove; 5. Threaded rod; 6. Twist handle; 7. Threaded sleeve; 8. Connecting rod; 9. Connecting plate; 10. Resistance plate; 11. Guide rod; 12. Limit sleeve; 13. Sealing strip; 14. Ratchet; 15. Positioning rod; 16. Bolt; 17. Mounting block; 18. Ratchet. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a sealing device for preventing oil leakage from a reduction box of an oil pumping unit provided by the utility model; Figure 2 for Figure 1 A schematic diagram of the structure of the containing box and the sealing strip shown; Figure 3 for Figure 1 The sealing device for preventing oil leakage from the reducer of the pumping unit comprises a device shaft 1 and a reducer body 2, wherein the reducer body 2 is arranged on the device shaft 1, and a sealing strip 13 is used to seal the device shaft 1 and the reducer body 2.

[0023] A receiving box 3 is disposed on the surface of the reduction box body 2 , a plurality of receiving grooves 4 are disposed on the side wall of the receiving box 3 , a threaded rod 5 is disposed in the inner cavity of the receiving groove 4 , and a threaded sleeve 7 is threadedly connected to the surface of the threaded rod 5 .

[0024] A connecting rod 8 is fixedly connected to the surface of the threaded sleeve 7 , a connecting plate 9 is fixedly connected to the inner end of the connecting rod 8 , and a resisting plate 10 capable of contacting the surface of the sealing strip 13 is fixedly connected to the surface of the connecting plate 9 .

[0025] The outer end of the threaded rod 5 can be rotatably extended to the outside of the receiving box 3 , and the surface of the receiving groove 4 is provided with a clamping structure capable of locking the threaded rod 5 .

[0026] After twisting the threaded rod 5, the threaded sleeve 7 can be driven to move. During the movement of the threaded sleeve 7, the connection between the connecting rod 8 and the connecting plate 9 can be used to drive the contact plate 10 to move. When the contact plate 10 contacts the surface of the sealing strip 13, the sealing strip 13 is squeezed to avoid a gap between the sealing strip 13 and the equipment. In addition, the self-locking property between the threaded sleeve 7 and the threaded rod 5 can improve the stability of the sealing process.

[0027] The clamping structure includes a positioning rod 15 and a ratchet 14. The ratchet 14 is fixedly connected to the outer end of the surface of the threaded rod 5. The positioning rod 15 is fixedly connected to the top of the outer surface of the accommodating groove 4. The surface of the positioning rod 15 is rotatably provided with a pawl 18 adapted to the ratchet 14.

[0028] After the contact plate 10 contacts the surface of the sealing strip 13, the pawl 18 contacts the surface of the ratchet 14, thereby locking the threaded rod 5 after rotation, and then locking the working position of the contact plate 10, thereby better improving the stability during the sealing process, improving the sealing effect, and facilitating use to prevent oil leakage.

[0029] The outer end of the threaded rod 5 is fixedly connected with a twist handle 6, and the surface of the twist handle 6 is provided with anti-skid grooves, so that the twist handle 6 is convenient for workers to twist the threaded rod 5 to rotate.

[0030] The inner wall surface of the accommodating groove 4 is fixedly connected with a guide rod 11 , and the surface of the connecting rod 8 is fixedly connected with a limiting sleeve 12 . The limiting sleeve 12 can be slidably sleeved on the surface of the guide rod 11 .

[0031] When the threaded sleeve 7 drives the connecting rod 8 to move, it drives the limiting sleeve 12 to move on the surface of the guide rod 11, guides and limits the contact plate 10 during its movement, and improves the stability and smoothness of the contact plate 10 during its movement.

[0032] A plurality of mounting blocks 17 are fixedly connected to the surface of the reduction box body 2 , and the mounting blocks 17 are detachably connected to the containing box 3 via bolts 16 .

[0033] A plurality of receiving grooves 4 are evenly spaced and distributed in an annular manner along the side wall of the receiving box 3 .

[0034] The working principle of the sealing device for preventing oil leakage of the reduction box of the oil pumping unit provided by the utility model is as follows:

[0035] After twisting the twist handle 6 to drive the threaded rod 5 to rotate, the threaded sleeve 7 can be driven to move. During the movement of the threaded sleeve 7, the connection between the connecting rod 8 and the connecting plate 9 can be used to drive the contact plate 10 to move. When the contact plate 10 contacts the surface of the sealing strip 13, the sealing strip 13 is squeezed to avoid a gap between the sealing strip 13 and the equipment. After the contact plate 10 contacts the surface of the sealing strip 13, the pawl 18 and the surface of the ratchet 14 are engaged and contacted, and the threaded rod 5 is rotated and locked, thereby locking the working position of the contact plate 10.

[0036] Compared with the related art, the sealing device for preventing oil leakage of the reduction box of the pumping unit provided by the utility model has the following beneficial effects:

[0037] By twisting the threaded rod 5, the threaded sleeve 7 can be driven to move. During the movement of the threaded sleeve 7, the connection between the connecting rod 8 and the connecting plate 9 can be used to drive the contact plate 10 to move. When the contact plate 10 contacts the surface of the sealing strip 13, the sealing strip 13 is squeezed to avoid a gap between the sealing strip 13 and the equipment. In addition, the self-locking property between the threaded sleeve 7 and the threaded rod 5 can improve the stability of the sealing process. After the contact plate 10 contacts the surface of the sealing strip 13, the pawl 18 and the surface of the ratchet 14 are engaged and contacted, and then the threaded rod 5 is rotated to lock it, and then the working position of the contact plate 10 is locked, which effectively improves the stability of the sealing process, improves the sealing effect, and is beneficial to prevent oil leakage.

[0038] The above description is only 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 specification 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 sealing device for preventing oil leakage from a reduction box of an oil pump, comprising a device shaft (1) and a reduction box body (2), characterized in that: The reduction box body (2) is arranged on the equipment shaft (1), and the equipment shaft (1) and the reduction box body (2) are sealed by a sealing strip (13); The surface of the reduction gearbox body (2) is provided with a receiving box (3), the side wall of the receiving box (3) is provided with a plurality of receiving grooves (4), the inner cavity of the receiving groove (4) is provided with a threaded rod (5), the surface of the threaded rod (5) is threadedly connected with a threaded sleeve (7), the surface of the threaded sleeve (7) is fixedly connected with a connecting rod (8), the inner end of the connecting rod (8) is fixedly connected with a connecting plate (9), and the surface of the connecting plate (9) is fixedly connected with a contact plate (10) capable of contacting the surface of the sealing strip (13); The outer end of the threaded rod (5) can be rotatably extended to the outside of the accommodating box (3), and the surface of the accommodating groove (4) is provided with a clamping structure capable of locking the threaded rod (5).

2. The sealing device for preventing oil leakage from a reduction box of an oil pumping unit according to claim 1 is characterized in that: The clamping structure comprises a positioning rod (15) and a ratchet (14); the ratchet (14) is fixedly connected to the outer end of the surface of the threaded rod (5); the positioning rod (15) is fixedly connected to the top of the outer surface of the accommodating groove (4); and a ratchet pawl (18) adapted to the ratchet (14) is rotatably mounted on the surface of the positioning rod (15).

3. The sealing device for preventing oil leakage from a reduction box of an oil pumping unit according to claim 1, characterized in that: The outer end of the threaded rod (5) is fixedly connected to a twist handle (6), and the surface of the twist handle (6) is provided with anti-slip grooves.

4. The sealing device for preventing oil leakage from a reduction box of an oil pumping unit according to claim 1, characterized in that: The inner wall surface of the accommodating groove (4) is fixedly connected to a guide rod (11), the surface of the connecting rod (8) is fixedly connected to a limiting sleeve (12), and the limiting sleeve (12) can be slidably sleeved on the surface of the guide rod (11).

5. The sealing device for preventing oil leakage from a reduction box of an oil pumping unit according to claim 1, characterized in that: A plurality of mounting blocks (17) are fixedly connected to the surface of the reduction box body (2), and the mounting blocks (17) are detachably connected to the containing box (3) via bolts (16).

6. The sealing device for preventing oil leakage from a reduction box of an oil pumping unit according to claim 1, characterized in that: The plurality of accommodating grooves (4) are arranged in a circular manner and evenly spaced apart along the side wall of the accommodating box (3).

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