Easy-to-remove polished rod seal

Abstract

The utility model discloses an easy-to-disassemble light rod sealer, which relates to the technical field of light rod sealers, including a shell, a lower sealing cylinder and a wear-resistant sleeve, and through holes distributed in a circumferential array on the shell; the lower sealing cylinder is provided with a plug hole matching the through hole; the lower sealing cylinder is fixedly sleeved with a pressure cap, the pressure cap is hollow and a swivel, a driving mechanism and a plurality of insertion rods are respectively arranged inside, the swivel can be rotatably arranged in an accommodating cavity, one end of the insertion rod can pass through the pressure cap and the through hole in turn and be inserted into the plug hole, and the driving mechanism drives the swivel to rotate to move the insertion rod to realize the disassembly and assembly between the shell and the lower sealing cylinder. The utility model controls the movement of the insertion rod through the driving mechanism to realize the rapid disassembly and assembly of the shell and the lower sealing cylinder. Compared with the traditional method that requires repeated disassembly and assembly of multiple screws, the device only needs to adjust an adjustment head to complete the operation, which greatly simplifies the process and reduces the operation time and labor intensity.

Description

Technical Field

[0001] The utility model relates to the technical field of polished rod sealers, in particular to a polished rod sealer that is easy to disassemble. Background Art

[0002] The polished rod sealer is a sealing device used in oilfield pumping wellhead equipment. It is mainly used to seal the gap between the pumping rod (polished rod) and the wellhead to prevent the leakage of liquid, gas or impurities in the well, while reducing environmental pollution and equipment wear. The polished rod sealer plays a vital role in the oilfield production process, which can effectively improve the oil production efficiency and extend the service life of the equipment.

[0003] In the existing polished rod sealer, Figure 1 As shown in the figure, the wear-resistant sleeve plays the role of scraping oil. The wear-resistant sleeve is placed between the housing and the lower sealing cylinder. The housing and the lower sealing cylinder are locked with multiple M8*8 hexagon socket flat-end set screws. Therefore, when replacing the wear-resistant sleeve, it is necessary to repeatedly disassemble and assemble multiple hexagon socket flat-end set screws to complete the disassembly and assembly between the housing and the lower sealing cylinder to replace the wear-resistant sleeve. The operation is too cumbersome, and repeated disassembly and assembly can easily cause the hexagon socket flat-end set screws to wear and thread slip, thereby affecting the disassembly and assembly. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provides a polished rod sealer which is easy to disassemble.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The polished rod sealer that is easy to disassemble comprises a housing, a lower sealing cylinder and a wear-resistant sleeve, wherein the lower sealing cylinder is inserted at the end of the housing, the wear-resistant sleeve is located between the housing and the lower sealing cylinder, and comprises through holes distributed in a circumferential array on the housing, and a plug hole matching the through hole is provided on the lower sealing cylinder;

[0007] A pressure cap is fixedly sleeved on the lower sealing cylinder. The pressure cap is hollow and has a swivel, a driving mechanism and a plurality of insertion rods arranged therein. The swivel is rotatably arranged in the accommodating cavity. One end of the insertion rod can penetrate the pressure cap and the through hole in sequence and be inserted into the insertion hole. The driving mechanism drives the swivel to rotate and move the insertion rod to realize the disassembly and assembly between the shell and the lower sealing cylinder.

[0008] Preferably, an annular groove matching the insertion rod is opened on one side of the rotating ring, a sliding rod is slidably arranged in the annular groove, and one end of the sliding rod away from the annular groove passes through the insertion rod.

[0009] Preferably, the driving mechanism includes a connecting box fixedly connected to the pressure cap, a rotating rod is rotatably provided on the inner wall of the connecting box, the end of the rotating rod passes through the accommodating cavity and is fixedly connected to a small bevel gear, and one side of the rotating ring is fixedly connected to a large bevel gear disk meshing with the small bevel gear.

[0010] Preferably, an adjusting rod perpendicular to the rotating rod is rotatably provided on the connecting box, a worm sleeve is fixedly sleeved on the outer wall of the adjusting rod, and a worm wheel engaged with the worm sleeve is fixedly sleeved on the outer wall of the rotating rod.

[0011] Preferably, a plurality of limiting grooves matching the slide rod are fixedly connected to the inner wall of the pressure cap, and one end of the slide rod away from the annular groove passes through the insertion rod and extends into the limiting groove, and the slide rod can move along the length direction of the limiting groove.

[0012] Preferably, a spring is sleeved on the outer side of the insertion rod, and two ends of the spring are respectively in contact with the inner walls of the sliding rod and the pressure cap.

[0013] Preferably, a sealing ring is provided in the pressing cap, and when the shell is connected to the lower sealing cylinder, the sealing ring is located between the shell, the lower sealing cylinder and the pressing cap and is used for sealing.

[0014] Preferably, one end of the adjusting rod passes through the connecting box and is fixedly connected with an adjusting head, and the adjusting opening of the adjusting head is a hexagonal notch.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] In the present application, the worm sleeve and the worm wheel are driven by the adjusting rod to drive the rotating ring to rotate, thereby controlling the movement of the insert rod to achieve rapid disassembly and assembly of the shell and the lower sealing cylinder. Compared with the traditional method that requires repeated disassembly and assembly of multiple screws, the present device only needs to adjust an adjusting head to complete the operation, which greatly simplifies the process and reduces operation time and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a polished rod sealer of the prior art;

[0018] Figure 2 A schematic cross-sectional view of a polished rod sealer that is easy to disassemble is provided in the utility model;

[0019] Figure 3 The utility model provides a polished rod sealer which is easy to disassemble. Figure 2 The enlarged schematic diagram at A in the middle;

[0020] Figure 4 The utility model provides a schematic diagram of the cross-sectional structure of the pressure cap of the polished rod sealer which is easy to disassemble Figure 1 ;

[0021] Figure 5 The utility model provides a polished rod sealer which is easy to disassemble. Figure 4 The enlarged schematic diagram of point B in the middle;

[0022] Figure 6 The utility model provides a schematic diagram of the cross-sectional structure of the pressure cap of the polished rod sealer which is easy to disassemble Figure 2 ;

[0023] Figure 7 The utility model provides a polished rod sealer which is easy to disassemble. Figure 6 Enlarged schematic diagram at point C in the middle.

[0024] Legend: 1. Shell; 11. Through hole; 2. Lower sealing cylinder; 21. Insertion hole; 3. Wear-resistant sleeve; 4. Pressure cap; 41. Limiting groove; 5. Swivel; 51. Annular groove; 52. Sliding rod; 53. Large bevel gear; 6. Driving mechanism; 61. Connecting box; 62. Rotating rod; 63. Small bevel gear; 64. Adjusting rod; 65. Worm sleeve; 66. Worm wheel; 67. Adjusting head; 7. Insertion rod; 71. Spring; 8. Sealing ring; 9. Hexagon socket flat-end set screw. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0027] like Figure 1-7 As shown, the utility model provides a polished rod sealer that is easy to disassemble, including a housing 1, a lower sealing cylinder 2 and a wear-resistant sleeve 3, wherein the lower sealing cylinder 2 is inserted at the end of the housing 1, and the wear-resistant sleeve 3 is located between the housing 1 and the lower sealing cylinder 2, including a through hole 11 distributed in a circumferential array on the housing 1, and a plug hole 21 matching the through hole 11 is opened on the lower sealing cylinder 2;

[0028] A pressure cap 4 is fixedly sleeved on the lower sealing cylinder 2. The pressure cap 4 is hollow and has a swivel 5, a driving mechanism 6 and a plurality of insertion rods 7 arranged therein. The swivel 5 is rotatably arranged in the accommodating cavity. One end of the insertion rod 7 can sequentially penetrate the pressure cap 4 and the through hole 11 and be inserted into the insertion hole 21. The driving mechanism 6 drives the swivel 5 to rotate to move the insertion rod 7 to realize the disassembly and assembly between the shell 1 and the lower sealing cylinder 2.

[0029] In this embodiment, an annular groove 51 matching the insertion rod 7 is opened on one side of the rotating ring 5, and a sliding rod 52 is slidably arranged in the annular groove 51. The end of the sliding rod 52 away from the annular groove 51 passes through the insertion rod 7. The rotating ring 5 rotates so that the annular groove 51 rotates accordingly, and then the sliding rod 52 slides in the annular groove 51.

[0030] In this embodiment, the driving mechanism 6 includes a connecting box 61 fixedly connected to the pressing cap 4, and a rotating rod 62 is rotatably provided on the inner wall of the connecting box 61. The end of the rotating rod 62 passes through the accommodating cavity and is fixedly connected to a small bevel gear 63. One side of the rotating ring 5 is fixedly connected to a large bevel gear disk 53 that meshes with the small bevel gear 63. The small bevel gear 63 can be driven to rotate by the rotating rod 62, and the small bevel gear 63 and the large bevel gear disk 53 are meshed, thereby realizing the rotation of the rotating ring 5.

[0031] In this embodiment, an adjusting rod 64 perpendicular to the rotating rod 62 is rotatably provided on the connecting box 61, a worm sleeve 65 is fixedly sleeved on the outer wall of the adjusting rod 64, and a worm wheel 66 engaged with the worm sleeve 65 is fixedly sleeved on the outer wall of the rotating rod 62. The worm sleeve 65 is driven to rotate by the adjusting rod 64, and the rotating rod 62 is driven to rotate by the worm wheel 66. The worm sleeve 65 and the worm wheel 66 have self-locking ability to ensure that they will not easily loosen after installation.

[0032] In this embodiment, a plurality of limit grooves 41 matching the slide rod 52 are fixedly connected to the inner wall of the pressure cap 4. The end of the slide rod 52 away from the annular groove 51 passes through the insertion rod 7 and extends into the limit groove 41. The slide rod 52 can move along the length direction of the limit groove 41. When the slide rod 52 moves, its two ends are respectively located in the limit groove 41 and the annular groove 51, so that the slide rod 52 moves in a straight line to achieve the expected effect.

[0033] In this embodiment, a spring 71 is sleeved on the outer side of the insertion rod 7, and the two ends of the spring 71 respectively contact the inner wall of the slide rod 52 and the pressure cap 4. When dismantling, the elastic force of the spring 71 acts on the slide rod 52, which assists the reset of the slide rod 52, thereby ensuring that the slide rod 52 can be reset to separate the insertion rod 7 from the through hole 11 and the insertion hole 21.

[0034] In this embodiment, a sealing ring 8 is disposed in the pressing cap 4. When the housing 1 is connected to the lower sealing cylinder 2, the sealing ring 8 is located between the housing 1, the lower sealing cylinder 2 and the pressing cap 4 and is used for sealing.

[0035] In this embodiment, one end of the adjustment rod 64 passes through the connection box 61 and is fixedly connected to an adjustment head 67. The adjustment opening of the adjustment head 67 is an inner hexagonal slot. Through the adjustment head 67, a common hexagonal wrench can be used to conveniently control the rotation of the adjustment rod 64, which is easy to use.

[0036] How to use and working principle of this device:

[0037] When the device is in use, the adjusting rod 64 drives the worm sleeve 65 to rotate through the adjusting head 67, and the worm sleeve 65 rotates the rotating rod 62 through the cooperation with the worm wheel 66, and the rotating rod 62 drives the small bevel gear 63 to rotate, and the small bevel gear 63 rotates the rotating ring 5 through the large bevel gear plate 53, and the position of the annular groove 51 on the rotating ring 5 changes, so that the sliding rod 52 slides in the annular groove 51, and the sliding rod 52 can drive the insertion rod 7 to move, so that the insertion rod 7 is separated from the through hole 11 and the insertion hole 21, and the housing 1 and the lower sealing cylinder 2 can be separated and removed, and then the wear-resistant sleeve 3 is replaced. After replacement, the lower sealing cylinder 2 is reinserted into the housing 1, and the adjusting head 67 is reversed, so that the insertion rod 7 passes through the through hole 11 and the insertion hole 21, and the housing 1 and the lower sealing cylinder 2 are installed;

[0038] In summary, compared with the prior art method of repeatedly disassembling and assembling multiple hexagon socket flat-end locking screws to achieve the disassembly and assembly between the shell 1 and the lower sealing cylinder 2, the present application only needs to adjust one adjustment head 67 to complete the operation, which greatly simplifies the operation and is more convenient and quick. At the same time, it also avoids the situation where repeated disassembly and assembly easily causes the hexagon socket flat-end locking screw 9 to wear and strip, thereby affecting the disassembly and assembly.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A polished rod sealer that is easy to disassemble, comprising a housing (1), a lower sealing cylinder (2) and a wear-resistant sleeve (3), wherein the lower sealing cylinder (2) is inserted into the end of the housing (1), and the wear-resistant sleeve (3) is located between the housing (1) and the lower sealing cylinder (2), characterized in that: The shell (1) is provided with through holes (11) distributed in a circumferential array, and the lower sealing cylinder (2) is provided with insertion holes (21) matching the through holes (11); A pressure cap (4) is fixedly sleeved on the lower sealing cylinder (2); the pressure cap (4) is hollow and has a rotating ring (5), a driving mechanism (6) and a plurality of insertion rods (7) arranged therein; the rotating ring (5) is rotatably arranged in the accommodating cavity; one end of the insertion rod (7) can sequentially penetrate the pressure cap (4) and the through hole (11) and be inserted into the insertion hole (21); the driving mechanism (6) drives the rotating ring (5) to rotate so as to move the insertion rod (7) to realize assembly and disassembly between the housing (1) and the lower sealing cylinder (2).

2. The easily disassembled polished rod sealer according to claim 1, characterized in that: An annular groove (51) matching the insertion rod (7) is formed on one side of the rotating ring (5), a sliding rod (52) is slidably arranged in the annular groove (51), and an end of the sliding rod (52) away from the annular groove (51) passes through the insertion rod (7).

3. The easily disassembled polished rod sealer according to claim 1, characterized in that: The driving mechanism (6) comprises a connecting box (61) fixedly connected to the pressing cap (4); a rotating rod (62) is rotatably provided on the inner wall of the connecting box (61); an end of the rotating rod (62) penetrates into the accommodating cavity and is fixedly connected to a small bevel gear (63); and a large bevel gear disc (53) meshing with the small bevel gear (63) is fixedly connected to one side of the rotating ring (5).

4. The easily disassembled polished rod sealer according to claim 3, characterized in that: The connection box (61) is rotatably provided with an adjustment rod (64) perpendicular to the rotating rod (62); a worm sleeve (65) is fixedly sleeved on the outer wall of the adjustment rod (64); and a worm wheel (66) engaged with the worm sleeve (65) is fixedly sleeved on the outer wall of the rotating rod (62).

5. The easily disassembled polished rod sealer according to claim 2, characterized in that: A plurality of limiting grooves (41) matching the slide rod (52) are fixedly connected to the inner wall of the pressure cap (4); one end of the slide rod (52) away from the annular groove (51) passes through the insertion rod (7) and extends into the limiting groove (41); the slide rod (52) can move along the length direction of the limiting groove (41).

6. The easily disassembled polished rod sealer according to claim 5, characterized in that: A spring (71) is sleeved on the outer side of the insertion rod (7), and two ends of the spring (71) respectively contact the inner wall of the sliding rod (52) and the pressing cap (4).

7. The easily disassembled polished rod sealer according to claim 1, characterized in that: A sealing ring (8) is arranged inside the pressing cap (4); when the housing (1) is connected to the lower sealing cylinder (2), the sealing ring (8) is located between the housing (1), the lower sealing cylinder (2) and the pressing cap (4) and is used for sealing.

8. The easily disassembled polished rod sealer according to claim 4, characterized in that: One end of the adjustment rod (64) passes through the connection box (61) and is fixedly connected to an adjustment head (67); the adjustment opening of the adjustment head (67) is a hexagonal notch.

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