Multi-stage hydraulic oil cylinder sealing structure for filter press

Abstract

The utility model discloses a multistage hydraulic oil cylinder sealing structure for a filter press, which belongs to the technical field of hydraulic oil cylinders and comprises a cylinder body, a piston rod is mounted in the cylinder body, a sealing structure body is arranged on the cylinder body, and the sealing structure body comprises a sealing ring fixedly mounted at the top of the cylinder body. And a first sealing sleeve and a second sealing sleeve are symmetrically mounted on the sealing ring. Through the arrangement of the sealing structure body, the first sealing sleeve and the second sealing sleeve are combined to seal the cylinder body and the piston rod, the cylinder body and the piston rod are installed and fixed through clamping of the multiple clamping frames, and a traditional bolt fixing mode is replaced to install the whole sealing structure body on the cylinder body and the piston rod. And the first sealing sleeve and the second sealing sleeve are quickly disassembled and separated, so that the internal sealing ring is conveniently replaced, damage is not easily caused, and subsequent disassembly and assembly use cannot be influenced.

Description

Technical Field

[0001] This utility model relates to a multi-stage hydraulic cylinder for a filter press, and more particularly to a sealing structure for a multi-stage hydraulic cylinder for a filter press, belonging to the technical field of hydraulic cylinders. Background Technology

[0002] A filter press is a mechanical device that effectively separates solid particles from liquid in a suspension by applying external pressure. It is widely used in industries such as chemical, pharmaceutical, food, metallurgy, mineral processing, coal, and wastewater treatment. Its core function is to separate solids and liquids in high-concentration suspensions to produce filter cakes with low water content and clear filtrate.

[0003] Hydraulic cylinders are the core actuators of filter presses, playing an irreplaceable role in critical stages such as pressing, pressure holding, and unloading. Existing hydraulic cylinders are equipped with sealing structures to prevent hydraulic oil leakage. However, these sealing structures are usually installed on the hydraulic cylinder using multiple bolts. After long-term use, the sealing rings in the sealing structure will wear out. The bolt fixing method makes it difficult to disassemble the sealing structure, making it inconvenient to quickly disassemble the sealing structure to replace the sealing rings. It is also easy to damage the surface of the cylinder body and the bolts, affecting subsequent disassembly and assembly. Utility Model Content

[0004] The main purpose of this utility model is to solve the above-mentioned problems and provide a multi-stage hydraulic cylinder sealing structure for filter presses.

[0005] The objective of this utility model can be achieved by adopting the following technical solution: by setting the sealing structure body, the cylinder body and piston rod are sealed by setting the first sealing sleeve and the second sealing sleeve together, and the installation and fixation are carried out by the clamping of multiple clamping frames, replacing the traditional bolt fixing method. The sealing structure body is installed on the cylinder body and piston rod as a whole, so that the first sealing sleeve and the second sealing sleeve can be quickly disassembled and separated, thereby facilitating the replacement of the internal sealing ring, and is not easy to cause damage, and will not affect subsequent disassembly and assembly.

[0006] A multi-stage hydraulic cylinder sealing structure for a filter press includes a cylinder body, a piston rod installed inside the cylinder body, and a sealing structure body on the cylinder body. The sealing structure body includes a sealing ring fixedly installed on the top of the cylinder body, a first sealing sleeve and a second sealing sleeve symmetrically installed on the sealing ring, two fixing brackets symmetrically fixedly installed on both sides of the sealing ring, a fixing frame fixedly installed on the fixing bracket, a rotating rod movably installed on the fixing frame, two screws movably installed inside the fixing frame, bevel gears meshing with each other installed at the close ends of the rotating rod and the screws, a moving block installed on the screw, a clamping frame fixedly installed on one side of the moving block, multiple fastening rods fixedly installed on the surfaces of the first sealing sleeve and the second sealing sleeve, and multiple support frames fixedly installed on the inner walls of the first sealing sleeve and the second sealing sleeve, with sealing rings provided on the support frames.

[0007] Preferably, a limiting groove is provided on the fastening rod, and a limiting rod is fixedly installed on the inner side of the clamping frame.

[0008] Preferably, multiple push rods are uniformly fixedly installed on the surface of the rotating rod, and the surface of the push rods is provided with anti-slip texture.

[0009] Preferably, the support frame has an installation groove, the inner diameter of which matches the vertical thickness of the sealing ring.

[0010] Preferably, a first sleeve is fitted onto the piston rod, and a second sleeve is movably installed inside the first sleeve. A rubber ring that fits against the surface of the second sleeve is fixedly installed on the inner wall of the first sleeve.

[0011] Preferably, multiple fixing blocks are fixedly installed on the surfaces of the first sleeve and the second sleeve, and bolts that are threadedly connected to the first sealing sleeve, the second sealing sleeve and the piston rod are installed on the multiple fixing blocks.

[0012] Preferably, a protective sleeve is provided on one end of the bolt, and the protective sleeve has a groove that fits tightly with one end of the bolt.

[0013] The beneficial technical effects of this utility model are as follows: According to the multi-stage hydraulic cylinder sealing structure for filter press of this utility model, the cylinder body and piston rod are sealed by setting the sealing structure body and using a first sealing sleeve and a second sealing sleeve combined. The sealing structure body is installed and fixed by multiple clamping frames, which replaces the traditional bolt fixing method to install the sealing structure body as a whole on the cylinder body and piston rod. This allows the first sealing sleeve and the second sealing sleeve to be quickly disassembled and separated, which facilitates the replacement of the internal sealing ring and is less likely to cause damage, and will not affect subsequent disassembly and assembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure according to a preferred embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram showing the structure of the first sealing sleeve and the second sealing sleeve according to a preferred embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of a clamping frame structure according to a preferred embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of a support frame structure according to a preferred embodiment of the present invention;

[0018] Figure 5 This is a partial structural cross-sectional view of the first and second sleeves according to a preferred embodiment of the present invention.

[0019] In the diagram: 1. Cylinder body; 2. Piston rod; 3. Sealing structure body; 4. Sealing ring; 5. First sealing sleeve; 6. Second sealing sleeve; 7. Fixing bracket; 8. Fixing frame; 9. Rotating rod; 10. Screw; 11. Bevel gear; 12. Moving block; 13. Clamping frame; 14. Fastening rod; 15. Support frame; 16. Sealing ring; 17. Limiting groove; 18. Limiting rod; 19. Push rod; 20. Mounting groove; 21. First sleeve; 22. Second sleeve; 23. Rubber ring; 24. Fixing block; 25. Bolt; 26. Protective sleeve. Detailed Implementation

[0020] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0021] like Figures 1-5As shown in the figure, this embodiment provides a multi-stage hydraulic cylinder sealing structure for a filter press, including a cylinder body 1, a piston rod 2 installed inside the cylinder body 1, a sealing structure body 3 provided on the cylinder body 1, a sealing ring 4 fixedly installed on the top of the cylinder body 1, a first sealing sleeve 5 and a second sealing sleeve 6 symmetrically installed on the sealing ring 4, two fixing frames 7 symmetrically fixedly installed on both sides of the sealing ring 4, a fixing frame 8 fixedly installed on the fixing frame 7, a rotating rod 9 movably installed on the fixing frame 8, two screws 10 movably installed inside the fixing frame 8, bevel gears 11 meshing with each other are installed at the ends of the rotating rod 9 and the screws 10 that are close to each other, a moving block 12 is installed on the screw 10, a clamping frame 13 is fixedly installed on one side of the moving block 12, multiple fastening rods 14 are fixedly installed on the surfaces of the first sealing sleeve 5 and the second sealing sleeve 6, multiple support frames 15 are fixedly installed on the inner walls of the first sealing sleeve 5 and the second sealing sleeve 6, and a sealing ring 16 is provided on the support frame 15. By setting the sealing structure body 3, the cylinder body 1 and piston rod 2 are sealed by combining the first sealing sleeve 5 and the second sealing sleeve 6. The sealing structure body 3 is installed and fixed by the clamping of multiple clamping frames 13, replacing the traditional bolt fixing method. This allows the first sealing sleeve 5 and the second sealing sleeve 6 to be quickly disassembled and separated, which facilitates the replacement of the internal sealing ring 16 and is less likely to cause damage, and will not affect subsequent disassembly and use.

[0022] In this embodiment, as Figures 1-5 As shown, a limiting groove 17 is provided on the fastening rod 14, a limiting rod 18 is fixedly installed on the inner side of the clamping frame 13, a plurality of push rods 19 are evenly fixedly installed on the surface of the rotating rod 9, the surface of the push rods 19 is provided with anti-slip texture, and an installation groove 20 is provided on the support frame 15, the inner diameter of the installation groove 20 matches the vertical thickness of the sealing ring 16. With the setting of the limiting groove 17 and the limiting rod 18, after the two clamping frames 13 clamp and fix the fastening rod 14 on the first sealing sleeve 5 and the second sealing sleeve 6, the limiting rod 18 is inserted into the limiting groove 17, which can improve the firmness of the clamping frame 13 clamping the fastening rod 14, and make the installation of the clamping frame 13 on the first sealing sleeve 5 and the second sealing sleeve 6 more stable and avoid shaking. With the setting of the push rod 19, the range of rotation operation is increased after multiple push rods 19 are set on the rotating rod 9, making it easier to rotate the rotating rod 9. With the setting of the mounting groove 20, the sealing ring 16 can be removed from the support frame 15. When replacing and installing the sealing ring 16, because the inner diameter of the mounting groove 20 matches the vertical thickness of the sealing ring 16, the sealing ring 16 can be tightly locked in the mounting groove 20, preventing it from falling off.

[0023] In this embodiment, as Figures 1-5As shown, a first sleeve 21 is fitted onto the piston rod 2, and a second sleeve 22 is movably installed inside the first sleeve 21. A rubber ring 23 that fits against the surface of the second sleeve 22 is fixedly installed on the inner wall of the first sleeve 21. Multiple fixing blocks 24 are fixedly installed on the surfaces of both the first sleeve 21 and the second sleeve 22. Bolts 25 that are threadedly connected to the first sealing sleeve 5, the second sealing sleeve 6, and the piston rod 2 are installed on the multiple fixing blocks 24. A protective sleeve 26 is provided on one end of the bolt 25, and a groove is provided on the protective sleeve 26 that fits tightly with one end of the bolt 25. With the arrangement of the first sleeve 21, the second sleeve 22, the rubber ring 23, the fixing block 24, and the bolts 25, the first sleeve 21 is fixed to the first sealing sleeve 5 and the second sealing sleeve 6 by multiple bolts 25, while the second sleeve 22 is fixed to the piston rod 2 by multiple protective sleeves 26. When the piston rod 2 extends and retracts, it can drive the second sleeve 22 to move together. During the movement, the second sleeve 22 always moves inside the first sleeve 21. Under the action of the first sleeve 21, the second sleeve 22, and the rubber ring 23, the exposed part of the piston rod 2 is always wrapped to prevent fine dust and sand particles from adhering to the piston rod 2 and being carried into the cylinder 1. With the arrangement of the protective sleeves 26, the protective sleeves 26 rely on the grooves opened inside to engage with the exposed end of the bolts 25, which can protect one end of the bolts 25 and prevent the bolts 25 from being corroded and damaged.

[0024] In this embodiment, as Figures 1-5 As shown in the figure, the working process of the multi-stage hydraulic cylinder sealing structure for a filter press provided in this embodiment is as follows:

[0025] The first sealing sleeve 5 and the second sealing sleeve 6 are fitted onto the outside of the piston rod 2 and connected together on the sealing ring 4. Then, the rotating rod 9 is rotated to drive the screw 10 to rotate through the bevel gear 11. The rotation of the two screws 10 causes the moving block 12 to move closer to each other. The movement of the moving block 12 causes the clamping frame 13 to move, so that the two clamping frames 13 clamp the fastening rod 14 on the surface of the first sealing sleeve 5 and the second sealing sleeve 6. The first sealing sleeve 5 and the second sealing sleeve 6 are connected and fixed in sequence, so that the first sealing sleeve 5, the second sealing sleeve 6 and the multiple sealing rings 16 inside them are tightly attached to the piston rod 2, thereby sealing the connection between the cylinder body 1 and the piston rod 2 and preventing hydraulic oil leakage. When disassembling, the rotating rod 9 is rotated in the opposite direction to separate the two clamping frames 13, thereby releasing the clamping of the fastening rod 14. Then the first sealing sleeve 5 and the second sealing sleeve 6 can be separated and disassembled to replace the sealing ring 16.

[0026] In summary, according to the multi-stage hydraulic cylinder sealing structure for a filter press, the limiting groove 17 and the limiting rod 18, after the two clamping frames 13 clamp and fix the fastening rod 14 on the first sealing sleeve 5 and the second sealing sleeve 6, the limiting rod 18 is inserted into the limiting groove 17, which can improve the firmness of the clamping frame 13 clamping the fastening rod 14, making the installation of the clamping frame 13 on the first sealing sleeve 5 and the second sealing sleeve 6 more stable and preventing shaking. The push rod 19 increases the range of rotation operation by setting multiple push rods 19 on the rotating rod 9, making it easier to rotate the rotating rod 9. The mounting groove 20 allows the sealing ring 16 to be removed from the support frame 15. When replacing and installing the sealing ring 16, because the inner diameter of the mounting groove 20 matches the vertical thickness of the sealing ring 16, the sealing ring 16 can be tightly engaged in the mounting groove 20. To prevent detachment, the piston rod 2 is secured to the first sealing sleeve 5 and the second sealing sleeve 6 by multiple bolts 25, and the piston rod 2 is secured to the piston rod 2 by multiple protective sleeves 26. During the extension and retraction of the piston rod 2, the second sleeve 22 moves with it. During this movement, the second sleeve 22 remains inside the first sleeve 21, and the first sleeve 21, the second sleeve 22, and the rubber ring 23 continuously protect the exposed portion of the piston rod 2, preventing fine dust and sand particles from adhering to the piston rod 2 and being carried into the cylinder 1. The protective sleeves 26, with their internal grooves, engage with the exposed end of the bolt 25, protecting it from corrosion and damage.

[0027] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A multi-stage hydraulic cylinder seal structure for a filter press, comprising a cylinder body (1), a piston rod (2) is installed inside the cylinder body (1), characterized in that, The cylinder (1) is provided with a sealing structure body (3), the sealing structure body (3) includes a sealing ring (4) fixedly installed on the top of the cylinder (1), a first sealing sleeve (5) and a second sealing sleeve (6) are symmetrically installed on the sealing ring (4), two fixed frames (7) are symmetrically fixedly installed on the two sides of the sealing ring (4), a fixed frame (8) is fixedly installed on the fixed frame (7), a rotating rod (9) is movably installed on the fixed frame (8), two screw rods (10) are movably installed in the fixed frame (8), the rotating rod (9) and the screw rod (10) are symmetrically fixedly installed on the fixed frame (8), a plurality of bevel gears (11) are symmetrically fixedly installed on the screw rod (10), a moving block (12) is movably installed on the screw rod (10), a clamping frame (13) is fixedly installed on one side of the moving block (12), a plurality of fastening rods (14) are fixedly installed on the surface of the first sealing sleeve (5) and the second sealing sleeve (6), a plurality of supporting frames (15) are fixedly installed on the inner wall of the first sealing sleeve (5) and the second sealing sleeve (6), and a sealing ring (16) is arranged on the supporting frame (15).

2. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 1, characterized in that, A limiting groove (17) is formed in the fastening rod (14), and a limiting rod (18) is fixedly installed on the inner side of the clamping frame (13).

3. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 1, characterized in that, A plurality of push rods (19) are fixedly installed on the surface of the rotating rod (9), and anti-skid lines are arranged on the surface of the push rod (19).

4. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 1, characterized in that, An installation groove (20) is formed in the supporting frame (15), and the inner diameter of the installation groove (20) is consistent with the vertical thickness of the sealing ring (16).

5. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 1, characterized in that, A first sleeve (21) is arranged on the piston rod (2), a second sleeve (22) is movably installed in the first sleeve (21), and a rubber ring (23) is fixedly installed on the inner wall of the first sleeve (21) and abuts against the surface of the second sleeve (22).

6. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 5, characterized in that, A plurality of fixed blocks (24) are fixedly installed on the surface of the first sleeve (21) and the second sleeve (22), and a bolt (25) is threadedly connected with the first sealing sleeve (5), the second sealing sleeve (6) and the piston rod (2) and is installed on the plurality of fixed blocks (24).

7. The multi-stage hydraulic cylinder sealing structure for filter press according to claim 6, characterized in that, A protective sleeve (26) is arranged on one end of the bolt (25), and a groove is formed in the protective sleeve (26) and tightly clamped with one end of the bolt (25).

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