4-inch sand-proof oil cylinder structure

Abstract

This utility model relates to the field of hydraulic cylinder technology and discloses a 4-inch sand-resistant hydraulic cylinder structure, including a cylinder body. A fifth connecting sleeve is fixedly connected to the top of the cylinder body, and a fourth connecting sleeve is sleeved inside the fifth connecting sleeve. A cylinder cover is fixedly connected to the top of the fourth connecting sleeve. Four second mounting holes are equidistantly opened on the top of the cylinder cover, and each of the four second mounting holes is threaded with a second fixing bolt. The 4-inch sand-resistant hydraulic cylinder structure of this utility model, through the cylinder cover, can effectively reduce the sealing area, thereby improving the sealing effect and reducing the contact between mud and sand and the sealing position. The first oil delivery channel allows oil to be injected directly downwards into the motor without passing through the inside of the cylinder, enabling simultaneous oil injection or oil injection only into the lower motor, effectively improving the oil injection efficiency. Through a specific mechanical seal, a double-layer sealing mechanism can be set inside the cylinder, further enhancing the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a 4-inch anti-sand hydraulic cylinder structure. Background Technology

[0002] The hydraulic cylinder is an important sealing component for deep well water extraction. When in use, the entire unit is submerged in water to extract groundwater to the surface. It is used for domestic water supply, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship ballast adjustment, and can also be used for fountain landscaping.

[0003] Hydraulic cylinders are often used in situations where there is impact from incoming water flow. Traditional hydraulic cylinders have a large top cover area, resulting in a large gap between the cylinder and the incoming water carrying mud and sand. After prolonged use, this can easily affect the sealing effect. Existing hydraulic cylinders only have one oil inlet on the cylinder and another downward oil inlet inside the cylinder. This requires filling the cylinder with oil first before filling the bottom of the cylinder, which is cumbersome. Therefore, a 4-inch sand-resistant hydraulic cylinder structure is proposed. Utility Model Content

[0004] The main purpose of this utility model is to provide a 4-inch sand-resistant hydraulic cylinder structure, which solves the problem that the traditional hydraulic cylinder has a large top cover area, resulting in a large gap in contact with mud and sand, which easily affects the sealing effect after long-term use. The existing hydraulic cylinder only has one oil inlet on the cylinder and another oil inlet inside the cylinder for downward oil injection, which requires oil to be injected into the cylinder first before oil can be injected into the bottom of the cylinder, making the operation cumbersome.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A 4-inch sand-resistant hydraulic cylinder structure includes a cylinder body. A fifth connecting sleeve is fixedly connected to the top of the cylinder body. A fourth connecting sleeve is sleeved inside the fifth connecting sleeve. A cylinder cover is fixedly connected to the top of the fourth connecting sleeve. Four second mounting holes are equally spaced on the top of the cylinder cover. Each of the four second mounting holes is threaded with a second fixing bolt. Four third mounting holes are equally spaced on the top of the fifth connecting sleeve. The lower ends of the four second fixing bolts are respectively threaded into the four third mounting holes. A first sealing groove is formed on the inner side of the fifth connecting sleeve. An O-ring abuts in the first sealing groove, and the inner side of the cylinder cover abuts against the O-ring.

[0007] Furthermore, a skeleton oil seal is snapped into the inside of the cylinder head, a sand-throwing pad is snapped into the outside of the cylinder head, and a third connecting sleeve is fixedly connected above the sand-throwing pad.

[0008] Furthermore, an installation groove is provided on one side of the cylinder body, and four first fixing bolts are threaded at equal intervals on the upper part of the cylinder body, and special flat groove pressure plates are threaded on the inner side of the four first fixing bolts.

[0009] Furthermore, a second limiting groove is provided on the inner side of the fourth connecting sleeve, a first sealing stationary ring is engaged inside the second limiting groove, a first sealing moving ring is fixedly connected below the first sealing stationary ring, a spring is fixedly connected below the first sealing stationary ring, a second sealing moving ring is fixedly connected below the spring, a second sealing stationary ring is fixedly connected below the second sealing moving ring, a first limiting groove is provided inside the cylinder body, and the lower end of the second sealing stationary ring is engaged in the first limiting groove, and a movable groove is provided below the cylinder body.

[0010] Furthermore, a first oil delivery groove is provided on one side of the cylinder body, a first oil injection bolt is threadedly connected to the upper part of the first oil delivery groove, a first sealing ring is snapped into the inside of the first oil delivery groove, and the upper part of the first sealing ring abuts against the first oil injection bolt.

[0011] Furthermore, a second oil delivery groove is provided on one side of the cylinder body, a second oil injection bolt is threadedly connected to the upper part of the first oil delivery groove, a second sealing ring is snapped into the inside of the second oil delivery groove, and the upper part of the second sealing ring abuts against the second oil injection bolt.

[0012] Furthermore, a plurality of first mounting holes are equidistantly provided on the outer side of the cylinder body, and a first connecting sleeve is fixedly connected to the lower part of the cylinder body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through the design of the cylinder cover, can effectively reduce the sealing area and improve the sealing effect. It can reduce the contact between mud and sand and the sealing position. By setting an additional cover on top of the traditional cylinder cover, the traditional cylinder cover and cylinder body are integrated into one structure, and the cylinder cover is set as a separate cover. At the same time, an O-ring is used for sealing. Through this design, the sealing area can be effectively reduced, thus improving the sealing effect and reducing the contact between mud and sand and the sealing position, thereby achieving a sand-resistant effect.

[0015] 2. This utility model, through its first oil delivery channel, allows oil to be injected directly downwards into the motor without passing through the inside of the oil cylinder. This enables simultaneous oil injection or oil injection only into the lower motor, effectively improving oil injection efficiency. When oil needs to be injected into the barrel, the first oil injection bolt is rotated off, followed by the first sealing ring. Oil can then be injected into the barrel through the first oil delivery channel. After oil injection, the first sealing ring is replaced, and then the first oil injection bolt is rotated to fix it, completing the oil injection process. This design allows oil to be injected directly downwards into the motor without passing through the inside of the oil cylinder, enabling simultaneous oil injection or oil injection only into the lower motor, effectively improving oil injection efficiency.

[0016] 3. This utility model, through the use of a spring, enables the establishment of a double-layer sealing mechanism inside the oil cylinder, thereby improving the sealing effect. When the spring is compressed, it pushes the first sealing stationary ring, the first sealing moving ring, the second sealing moving ring, and the second sealing stationary ring upwards and downwards. The first and second sealing stationary rings engage with the second and first limiting grooves, respectively. These rings seal the joint between the rotor shaft and the oil cylinder body from both sides, as well as the joint between the rotor shaft and the second limiting groove. This design allows for the establishment of a double-layer sealing mechanism inside the oil cylinder, thus enhancing the sealing effect.

[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the 4-inch anti-sand type hydraulic cylinder of this utility model, mounted on the barrel.

[0019] Figure 2 This is a schematic diagram showing the overall structure of the 4-inch anti-sand cylinder structure of this utility model, including the installation state of the rotor shaft.

[0020] Figure 3 This is an enlarged schematic diagram of the first angle of the cylinder body of the 4-inch anti-sand cylinder structure of this utility model.

[0021] Figure 4 This is an enlarged schematic diagram of the second angle of the cylinder body of the 4-inch anti-sand cylinder structure of this utility model.

[0022] Figure 5 This is an enlarged schematic diagram of a portion of the cylinder body of the 4-inch anti-sand cylinder structure of this utility model in an exploded state.

[0023] Figure 6 This is an enlarged schematic diagram of the first cross-section of the cylinder body of the 4-inch anti-sand cylinder structure of this utility model.

[0024] Figure 7 This is an enlarged schematic diagram of a portion of the second cross-section of the cylinder body of the 4-inch anti-sand cylinder structure of this utility model.

[0025] In the diagram: 1. Cylinder body; 2. First mounting hole; 4. First connecting sleeve; 5. First oil delivery groove; 6. First oil injection bolt; 7. First sealing ring; 8. Second oil delivery groove; 9. Second oil injection bolt; 10. Second sealing ring; 12. Mounting groove; 13. Special flat groove pressure plate; 14. First fixing bolt; 15. O-ring seal; 16. Cylinder cover; 17. Second mounting hole; 18. Skeleton oil seal; 19. Sand-throwing pad; 20. Third connecting sleeve; 21. Second fixing bolt; 22. First sealing stationary ring; 23. First sealing moving ring; 24. Spring; 25. Second sealing moving ring; 26. Second sealing stationary ring; 27. First limiting groove; 28. Fourth connecting sleeve; 29. ​​Fifth connecting sleeve; 30. Third mounting hole; 31. Second limiting groove; 32. Movable groove. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figures 1-7 As shown, the 4-inch sand-resistant hydraulic cylinder structure includes a cylinder body 1. A fifth connecting sleeve 29 is fixedly connected to the top of the cylinder body 1. A fourth connecting sleeve 28 is sleeved inside the fifth connecting sleeve 29. A cylinder cover 16 is fixedly connected to the top of the fourth connecting sleeve 28. Four second mounting holes 17 are equally spaced on the top of the cylinder cover 16. Each of the four second mounting holes 17 is threaded with a second fixing bolt 21. Four third mounting holes 30 are equally spaced on the top of the fifth connecting sleeve 29. The lower ends of the four second fixing bolts 21 are respectively threaded into... Within the four third mounting holes 30, a first sealing groove is provided on the inner side of the fifth connecting sleeve 29. An O-ring 15 abuts in the first sealing groove, and the inner side of the cylinder head 16 abuts against the O-ring 15. By adopting the above technical solution, the O-ring 15 is located at the gap between the cylinder head 16 and the fifth connecting sleeve 29. When the cylinder head 16 is fixed to the fifth connecting sleeve 29 by the second fixing bolt 21, the cylinder head 16 will squeeze the O-ring 15 from above, which will significantly improve the sealing effect of the O-ring 15.

[0028] The cylinder head 16 is fitted with a skeleton oil seal 18 inside, and a sand-throwing pad 19 is fitted with the outside of the cylinder head 16. A third connecting sleeve 20 is fixedly connected above the sand-throwing pad 19. By adopting the above technical solution, the skeleton oil seal 18 can seal the gap between the rotor shaft and the cylinder head 16 from the outside.

[0029] Furthermore, the center diameters of the third connecting sleeve 20, the cylinder cover 16, and the skeleton oil seal 18 are consistent, which facilitates the passage of the rotor shaft.

[0030] A mounting groove 12 is provided on one side of the cylinder body 1. Four first fixing bolts 14 are threaded at equal intervals on the upper part of the cylinder body 1, and special flat groove pressure plates 13 are threaded on the inner side of the four first fixing bolts 14. By adopting the above technical solution, the interior of the mounting groove 12 is funnel-shaped, and the shape of the headed special flat groove fits the internal shape of the mounting groove 12. At the same time, the special flat groove pressure plate 13 covers it from above, which can play the role of limiting and fixing the headed special flat groove.

[0031] The inner side of the fourth connecting sleeve 28 is provided with a second limiting groove 31. The first sealing stationary ring 22 is engaged inside the second limiting groove 31. The first sealing rotating ring 23 is fixedly connected below the first sealing stationary ring 22. The first sealing rotating ring 24 is fixedly connected below the first sealing rotating ring 23. The second sealing rotating ring 25 is fixedly connected below the spring 24. The second sealing stationary ring 26 is fixedly connected below the second sealing rotating ring 25. The inner side of the cylinder body 1 is provided with a first limiting groove 27, and the lower end of the second sealing stationary ring 26 is engaged in the first limiting groove 27. The lower side of the cylinder body 1 is provided with a movable groove 32. By adopting the above technical solution, the first sealing stationary ring 22 is made of ceramic material, the first sealing rotating ring 23 is made of silicon carbide material, the second sealing rotating ring 25 is made of graphite material, and the second sealing stationary ring 26 is made of silicon carbide material, which seal from different angles. The middle hole diameters of the first sealing stationary ring 22, the first sealing rotating ring 23, the second sealing rotating ring 25, and the second sealing stationary ring 26 are the same, which facilitates the passage of the rotor shaft.

[0032] When the spring 24 is in a pre-compressed state, it squeezes and pushes the first sealing stationary ring 22, the first sealing moving ring 23, the second sealing moving ring 25, and the second sealing stationary ring 26 on both sides, so that the first sealing stationary ring 22, the first sealing moving ring 23, the second sealing moving ring 25, and the second sealing stationary ring 26 are squeezed and stuck into the first limiting groove 27 and the second limiting groove 31 to strengthen the seal.

[0033] A first oil delivery groove 5 is provided on one side of the cylinder body 1. A first oil injection bolt 6 is threadedly connected to the top of the first oil delivery groove 5. A first sealing ring 7 is snapped into the inside of the first oil delivery groove 5. The top of the first sealing ring 7 abuts against the first oil injection bolt 6. By adopting the above technical solution, a threaded slot is provided inside the first oil delivery groove 5 to facilitate the threaded connection between the first oil delivery groove 5 and the first oil injection bolt 6.

[0034] The first oil delivery channel 5 is not connected to the internal space of the cylinder body 1, but is connected to the lower space of the cylinder body 1.

[0035] The first sealing ring 7 has a sealing function and is located at the joint between the first oil injection bolt 6 and the first oil delivery groove 5. When the first oil injection bolt 6 is threaded into the first oil delivery groove 5, it can play a sealing function.

[0036] The first sealing stationary ring 22 and the second sealing stationary ring 26 are both stationary components, fixed to the housing; the first sealing rotating ring 23 and the second sealing rotating ring 25 are both rotating components, mounted on the shaft, and are preloaded by the spring 24.

[0037] A second oil delivery groove 8 is provided on one side of the cylinder body 1. A second oil injection bolt 9 is threadedly connected above the first oil delivery groove 5. A second sealing ring 10 is snapped into the inside of the second oil delivery groove 8. The second sealing ring 10 abuts against the second oil injection bolt 9 above. By adopting the above technical solution, a threaded slot is provided inside the second oil delivery groove 8 to facilitate the threaded connection between the second oil delivery groove 8 and the second oil injection bolt 9.

[0038] The second oil supply channel 8 is connected to the internal space of the cylinder body 1, but not to the lower space of the cylinder body 1. Oil can be injected into the interior of the cylinder body 1 through the second oil supply channel 8.

[0039] The second sealing ring 10 has a sealing function and is located at the joint between the second oil injection bolt 9 and the second oil delivery groove 8. When the second oil injection bolt 9 is threaded into the second oil delivery groove 8, it can perform a sealing function.

[0040] A plurality of first mounting holes 2 are equidistantly provided on the outer side of the cylinder body 1. A first connecting sleeve 4 is fixedly connected to the lower part of the cylinder body 1. By adopting the above technical solution, a threaded groove is provided in the first mounting hole 2, which facilitates the external equipment shell to be fixed to the outside of the cylinder body 1 by external bolts. The bearing can be easily installed inside the first connecting sleeve 4, and the bearing is installed on the outside of the rotor shaft.

[0041] It should be noted that during use, the rotor shaft is inserted into the cylinder body 1, and the rotor shaft is sleeved between the third connecting sleeve 20, the sand-throwing pad 19, the skeleton oil seal 18, the fourth connecting sleeve 28, the first sealing stationary ring 22, the first sealing moving ring 23, the second sealing moving ring 25, and the second sealing stationary ring 26. At the same time, the lower end of the rotor shaft passes through the movable groove 32, and the cylinder is installed on the barrel through the first mounting hole 2 and the external bolts.

[0042] In use, the spring 24 is in a compressed state, and the spring 24 pushes the first sealing stationary ring 22, the first sealing moving ring 23, the second sealing moving ring 25 and the second sealing stationary ring 26 upward and downward. The first sealing stationary ring 22 and the second sealing stationary ring 26 are engaged in the second limiting groove 31 and the first limiting groove 27. The first sealing stationary ring 22, the first sealing moving ring 23, the second sealing moving ring 25 and the second sealing stationary ring 26 seal the joint between the rotor shaft and the cylinder body 1 from both sides and seal the joint between the rotor shaft and the second limiting groove 31.

[0043] When it is necessary to inject oil into the cylinder, rotate and remove the second oil injection bolt 9, then remove the second sealing ring 10. Oil can be injected into the cylinder body 1 through the second oil channel 8. After the oil injection is completed, reinstall the second sealing ring 10, then rotate and fix the second oil injection bolt 9 to complete the oil injection.

[0044] When it is necessary to inject oil into the barrel, rotate and remove the first oil injection bolt 6, then remove the first sealing ring 7, and oil can be injected into the barrel through the first oil delivery groove 5. After the oil injection is completed, reinstall the first sealing ring 7, then rotate and fix the first oil injection bolt 6 to complete the oil injection.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A 4-inch sand-proof oil cylinder structure comprising an oil cylinder body (1), characterized in that, A fifth connecting sleeve (29) is fixedly connected to the top of the cylinder body (1). A fourth connecting sleeve (28) is sleeved inside the fifth connecting sleeve (29). A cylinder cover (16) is fixedly connected to the top of the fourth connecting sleeve (28). Four second mounting holes (17) are equally spaced on the top of the cylinder cover (16). A second fixing bolt (21) is threaded into each of the four second mounting holes (17). Four third mounting holes (30) are equally spaced on the top of the fifth connecting sleeve (29). The lower ends of the four second fixing bolts (21) are threaded into the four third mounting holes (30). A first sealing groove is opened on the inner side of the fifth connecting sleeve (29). An O-ring (15) abuts in the first sealing groove. The inner side of the cylinder cover (16) abuts against the O-ring (15).

2. The 4-inch sand-proof oil cylinder structure according to claim 1, characterized in that: The cylinder cover (16) is fitted with a skeleton oil seal (18) inside, and a sand-throwing pad (19) is fitted with the outside of the cylinder cover (16). A third connecting sleeve (20) is fixedly connected above the sand-throwing pad (19).

3. The 4-inch sand-proof oil cylinder structure according to claim 2, characterized in that: The cylinder body (1) has an installation groove (12) on one side, and four first fixing bolts (14) are threaded at equal intervals on the top of the cylinder body (1), and special flat groove pressure plates (13) are threaded on the inner side of the four first fixing bolts (14).

4. The 4-inch sand-proof oil cylinder structure according to claim 3, characterized in that: The inner side of the fourth connecting sleeve (28) is provided with a second limiting groove (31), and a first sealing stationary ring (22) is engaged inside the second limiting groove (31). A first sealing moving ring (23) is fixedly connected below the first sealing stationary ring (22), and a spring (24) is fixedly connected below the first sealing moving ring (23). A second sealing moving ring (25) is fixedly connected below the spring (24), and a second sealing stationary ring (26) is fixedly connected below the second sealing moving ring (25). The inner side of the cylinder body (1) is provided with a first limiting groove (27), and the lower end of the second sealing stationary ring (26) is engaged in the first limiting groove (27). The lower side of the cylinder body (1) is provided with a movable groove (32).

5. The 4-inch sand-proof oil cylinder structure according to claim 4, characterized in that: The cylinder body (1) has a first oil delivery groove (5) on one side. A first oil injection bolt (6) is threadedly connected to the top of the first oil delivery groove (5). A first sealing ring (7) is snapped into the inside of the first oil delivery groove (5). The top of the first sealing ring (7) abuts against the first oil injection bolt (6).

6. The 4-inch sand-proof oil cylinder structure according to claim 5, characterized in that: A second oil delivery groove (8) is provided on one side of the cylinder body (1). A second oil injection bolt (9) is threadedly connected above the first oil delivery groove (5). A second sealing ring (10) is snapped into the inside of the second oil delivery groove (8). The second oil injection bolt (9) is abutted above the second sealing ring (10).

7. The 4-inch sand-proof oil cylinder structure according to claim 6, characterized in that: The cylinder body (1) has several first mounting holes (2) equidistantly opened on its outer side, and a first connecting sleeve (4) is fixedly connected to the lower part of the cylinder body (1).

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