Leak-proof device for hydraulic oil cylinder

Abstract

The utility model provides a leakproof device for a hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a cylinder body, a piston rod is arranged on the inner side of the cylinder body, a connecting seat A is arranged at the top end of the cylinder body, a connecting seat B is arranged at the top end of the cylinder body, a pipeline A is communicated with the inner side of the connecting seat B, and a check valve A is arranged on the surface of the pipeline A. According to the utility model, through the arrangement of the connecting seat A, the connecting seat B, the pipeline A, the check valve A, the mounting plate, the oil receiving box, the oil seal, the sealing air bag, the inflating rod, the cover plate, the pipeline B and the check valve B, in the sliding process of the piston rod, the flowing-out hydraulic oil can be effectively collected and stopped under the action of the sealing air bag and the oil receiving box; the hydraulic oil is not leaked and wasted along with the work of the piston rod, and in the later work process of the piston rod, the collected hydraulic oil can be guided and injected into the inner side of the cylinder body again, so that the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to an anti-leakage device for a hydraulic cylinder. Background Technique

[0002] The anti-leakage device of a hydraulic cylinder refers to various mechanisms, technologies and strategies designed and installed in a hydraulic system, aiming to effectively collect and guide the hydraulic oil that inadvertently leaks from the cylinder or other system components. Its main purpose is to protect the hydraulic system from oil loss. The publication number CN213270543U discloses a hydraulic cylinder, including a cylinder barrel, a pipe sleeve is coaxially fixed on the outer wall of the cylinder barrel, two connecting pipes communicated with its inner cavity are fixed on the outer wall of the pipe sleeve, one of the connecting pipes is communicated with the water outlet of an external water pump, the other connecting pipe is communicated with an external cooling water tank, and a locking piece for quickly connecting with an external pipeline is arranged at one end of the connecting pipe away from the pipe sleeve, which has the effect of prolonging the service life of the hydraulic cylinder. However, like most hydraulic cylinders on the market at present, after the hydraulic cylinder has been used for a long time, the sealing ring is subjected to long-term movement friction of the piston rod, and wear will occur, resulting in oil leakage. However, this device cannot collect and guide the flowing hydraulic oil, and will cause leakage and waste of hydraulic oil, which needs to be improved. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems put forward in the above background technique.

[0004] The utility model adopts the following technical scheme: an anti-leakage device for a hydraulic cylinder, including a cylinder body, a piston rod is arranged inside the cylinder body, a connecting seat A is arranged at the top end of the cylinder body, a connecting seat B is arranged at the top end of the cylinder body, a pipeline A is communicated inside the connecting seat B, a check valve A is arranged on the surface of the pipeline A, the inner side of the cylinder body is threadedly connected with a mounting plate, an oil receiving box is fixedly installed on the side surface of the mounting plate, an oil seal is sleeved on the surface of the mounting plate, a sealing air bag is arranged inside the oil receiving box, an inflation rod is arranged inside the sealing air bag, a cover plate is arranged on the surface of the inflation rod, a pipeline B is communicated on the surface of the oil receiving box, and a check valve B is arranged on the surface of the pipeline B.

[0005] Preferably, threads are provided inside the cylinder body, and the threads provided inside the cylinder body are engaged with the threads on the surface of the mounting plate. Here, by setting the threads inside the cylinder body, the oil receiving box can be quickly installed by rotating the mounting plate, and the oil seal can be pressed tightly to improve the sealing effect.

[0006] Preferably, the inflatable rod is arranged inside the oil receiving box, and the sealing airbag is slidably connected to the piston rod. Here, by providing the inflatable rod, the inside of the sealing airbag can be inflated through the inflatable rod, so as to drive the sealing airbag to fit more closely to the piston rod, preventing hydraulic oil from leaking during the movement of the piston rod.

[0007] Preferably, the pipe B is communicated with the pipe A. Here, by providing the pipe A and the pipe B, during the working process of the piston rod extending, the hydraulic oil inside the oil receiving box and the connecting seat B can be pumped out and reinjected into the inside of the connecting seat A through the check valve A and the check valve B.

[0008] Preferably, a purification box is arranged at the top end of the connecting seat A. A motor is fixedly installed on the side surface of the purification box. The output end of the motor is fixedly installed with a threaded rod. A cleaning plate is threadedly connected to the surface of the threaded rod. A filter plate is arranged inside the purification box. A cavity is formed inside the purification box. One end of the threaded rod is fixedly installed with a gear. A baffle is slidably connected inside the cavity. A toothed plate is fixedly installed on the surface of the baffle. Here, by providing the purification box, the motor, the threaded rod, the cleaning plate, the filter plate, the cavity, the gear, and the toothed plate, the refluxed hydraulic oil can be filtered to avoid impurities from being mixed in during the reflux process of the hydraulic oil, and the filter plate can be quickly cleaned.

[0009] Preferably, the gear is meshed with the toothed plate, and a leakage groove is formed inside the purification box. Here, by providing the gear and the toothed plate, the baffle can be automatically driven to slide inside the cavity during the rotation of the threaded rod driven by the motor, so as to realize the closing or opening of the leakage groove.

[0010] Preferably, threads are formed inside the cleaning plate, and the threads formed inside the cleaning plate are meshed with the threads on the surface of the threaded rod. Here, by providing the threads inside the cleaning plate, the cleaning plate can be driven to scrape along the filter plate under the action of the threads during the rotation of the threaded rod.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] 1. In the present utility model, by providing the connecting seat A, the connecting seat B, the pipe A, the check valve A, the mounting plate, the oil receiving box, the oil seal, the sealing airbag, the inflatable rod, the cover plate, the pipe B, and the check valve B, during the sliding process of the piston rod, the outflowing hydraulic oil can be effectively collected and intercepted under the action of the sealing airbag and the oil receiving box, without leaking and wasting along with the work of the piston rod, and during the subsequent work of the piston rod, the collected hydraulic oil can be re-guided and injected into the inside of the cylinder block, with high practicability.

[0013] 2. In the present utility model, by providing a purification box, a motor, a threaded rod, a cleaning plate, a filter plate, a cavity, a gear, a baffle plate, and a toothed plate, during the process of hydraulic oil flowing back into the cylinder block again, impurities inside the hydraulic oil can be effectively intercepted, preventing impurities from being mixed in during the backflow of the hydraulic oil, and the automatic cleaning work of the filter plate can be carried out quickly, effectively extending the service life of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a schematic diagram of an anti-leakage device for a hydraulic cylinder proposed by the present utility model;

[0015] Figure 2 FIG. is an exploded view of an anti-leakage device for a hydraulic cylinder proposed by the present utility model;

[0016] Figure 3 FIG. is a cross-sectional view of an anti-leakage device for a hydraulic cylinder proposed by the present utility model;

[0017] Figure 4 FIG. shows an anti-leakage device for a hydraulic cylinder proposed by the present utility model Figure 3 and an enlarged view of part A therein;

[0018] Figure 5 FIG. is a bottom view of an anti-leakage device for a hydraulic cylinder proposed by the present utility model.

[0019] LEGEND DESCRIPTION:

[0020] 1. Cylinder block; 2. Piston rod; 3. Connecting seat A; 4. Connecting seat B; 5. Pipe A; 6. Check valve A; 7. Mounting plate; 8. Oil receiving box; 9. Oil seal; 10. Sealing airbag; 11. Inflating rod; 12. Cover plate; 13. Pipe B; 14. Check valve B; 15. Purification box; 16. Motor; 17. Threaded rod; 18. Cleaning plate; 19. Filter plate; 20. Cavity; 21. Gear; 22. Baffle plate; 23. Toothed plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Embodiment 1

[0024] Please refer toFigures 1-5 , the present utility model provides a technical solution: a leakage prevention device for a hydraulic cylinder, including a cylinder body 1, with threads provided on the inner side of the cylinder body 1. The threads provided on the inner side of the cylinder body 1 are engaged with the threads on the surface of the mounting plate 7. A piston rod 2 is arranged inside the cylinder body 1, and a connecting seat A3 is arranged at the top of the cylinder body 1. Hydraulic oil is injected into the inner side of the cylinder body 1 through the connecting seat A3. At this time, due to the non-compressible characteristic of the liquid, the hydraulic oil inside the cylinder body 1 will push the piston rod 2 to move outward. A connecting seat B4 is arranged at the top of the cylinder body 1, and a pipe A5 is communicated with the inside of the connecting seat B4. A check valve A6 is arranged on the surface of the pipe A5. The inner side of the cylinder body 1 is threadedly connected with a mounting plate 7. Align the mounting plate 7 with the cylinder body 1 and rotate it. Under the action of the threads, the mounting plate 7 and the oil receiving box 8 will be installed and fixed, and the oil seal 9 will be pressed tightly during this process, thereby improving the sealing effect. An oil receiving box 8 is fixedly installed on the side of the mounting plate 7, an oil seal 9 is sleeved on the surface of the mounting plate 7, and a sealing airbag 10 is arranged inside the oil receiving box 8. The sealing airbag 10 is slidably connected with the piston rod 2. Under the action of the oil receiving box 8 and the sealing airbag 10, the hydraulic oil brought out by the piston rod 2 will be intercepted and collected, thereby avoiding waste of hydraulic oil leakage. An inflation rod 11 is arranged inside the sealing airbag 10. The inflation rod 11 is arranged inside the oil receiving box 8, a cover plate 12 is arranged on the surface of the inflation rod 11, a pipe B13 is communicated with the surface of the oil receiving box 8, the pipe B13 is communicated with the pipe A5, and a check valve B14 is arranged on the surface of the pipe B13.

[0025] Embodiment Two

[0026] Please refer to Figures 3-4 , a purification box 15 is arranged at the top of the connecting seat A3. A leakage groove is provided inside the purification box 15. A motor 16 is fixedly installed on the side of the purification box 15. A threaded rod 17 is fixedly installed at the output end of the motor 16. A cleaning plate 18 is threadedly connected to the surface of the threaded rod 17. Start the motor 16 to drive the threaded rod 17 to rotate. Under the action of the threads, the cleaning plate 18 will be driven to slide on the surface of the filter plate 19. Threads are provided inside the cleaning plate 18. The threads provided inside the cleaning plate 18 are engaged with the threads on the surface of the threaded rod 17. A filter plate 19 is arranged inside the purification box 15. A cavity 20 is provided inside the purification box 15. A gear 21 is fixedly installed at one end of the threaded rod 17. The gear 21 is engaged with a toothed plate 23. When the threaded rod 17 rotates, it will drive the gear 21 to rotate. Under the meshing action, the toothed plate 23 and the baffle 22 will be driven to slide upward. A baffle 22 is slidably connected inside the cavity 20, and a toothed plate 23 is fixedly installed on the surface of the baffle 22.

[0027] Working principle: During operation, first, the oil seal 9 is sleeved on the surface of the mounting plate 7. Then, the mounting plate 7 is aligned with the cylinder block 1 and rotated. Under the action of the thread, the mounting plate 7 and the oil collecting box 8 are installed and fixed, and the oil seal 9 is pressed during this process, thereby improving the sealing effect. Then, the cover plate 12 is opened and the sealing airbag 10 is inflated through the inflation rod 11 until the sealing airbag 10 adheres to the surface of the piston rod 2. Then, the cover plate 12 is covered, and hydraulic oil is injected into the inner side of the cylinder block 1 through the connecting seat A3. At this time, due to the incompressible property of the liquid, the hydraulic oil inside the cylinder block 1 will push the piston rod 2 to move outward. During this process, part of the hydraulic oil may flow out with the piston rod 2. At this time, under the action of the oil collecting box 8 and the sealing airbag 10, the hydraulic oil brought out by the piston rod 2 will be intercepted and collected, thereby avoiding the leakage and waste of hydraulic oil. Then, during the next extension process of the piston rod 2, the hydraulic oil will be re-injected into the inner side of the cylinder block 1 under the action of the pipeline A5, the pipeline B13, the check valve A6, and the check valve B14, and the impurities that may adhere to the hydraulic oil will be filtered out under the action of the filter plate 19. When cleaning the filter plate 19, first start the motor 16 to drive the threaded rod 17 to rotate. Under the action of the thread, the cleaning plate 18 will slide on the surface of the filter plate 19, thereby cleaning the impurities on the surface of the filter plate 19. While the threaded rod 17 is rotating, the gear 21 will be driven to rotate. Under the meshing action, the toothed plate 23 and the baffle 22 will slide upward, exposing the leakage groove, and then the impurities can be discharged.

[0028] The above is only the preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A leakage prevention device for a hydraulic cylinder, comprising a cylinder body (1), characterized in that: A piston rod (2) is arranged on the inner side of the cylinder body (1), a connecting seat A (3) is arranged on the top of the cylinder body (1), a connecting seat B (4) is arranged on the top of the cylinder body (1), a pipeline A (5) is connected to the inner side of the connecting seat B (4), a check valve A (6) is arranged on the surface of the pipeline A (5), a mounting plate (7) is threadedly connected to the inner side of the cylinder body (1), an oil receiving box (8) is fixedly mounted on the side of the mounting plate (7), an oil seal (9) is sleeved on the surface of the mounting plate (7), a sealing air bag (10) is arranged on the inner side of the oil receiving box (8), an inflation rod (11) is arranged on the inner side of the sealing air bag (10), a cover plate (12) is arranged on the surface of the inflation rod (11), a pipeline B (13) is connected to the surface of the oil receiving box (8), and a check valve B (14) is arranged on the surface of the pipeline B (13).

2. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: The inner side of the cylinder body (1) is provided with a thread, and the thread provided on the inner side of the cylinder body (1) is meshed with the thread on the surface of the mounting plate (7).

3. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: The inflation rod (11) is arranged on the inner side of the oil receiving box (8), and the sealing air bag (10) is slidably connected to the piston rod (2).

4. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: The pipeline B (13) is connected to the pipeline A (5).

5. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: A purification box (15) is arranged at the top of the connecting seat A (3), a motor (16) is fixedly mounted on the side of the purification box (15), a threaded rod (17) is fixedly mounted on the output end of the motor (16), a cleaning plate (18) is threadedly connected to the surface of the threaded rod (17), a filter plate (19) is arranged on the inner side of the purification box (15), a cavity (20) is opened on the inner side of the purification box (15), a gear (21) is fixedly mounted on one end of the threaded rod (17), a baffle (22) is slidably connected to the inner side of the cavity (20), and a toothed plate (23) is fixedly mounted on the surface of the baffle (22).

6. The anti-leakage device for a hydraulic cylinder according to claim 5, characterized in that: The gear (21) is meshed with the toothed plate (23), and a leakage groove is provided on the inner side of the purification box (15).

7. The anti-leakage device for a hydraulic cylinder according to claim 5, characterized in that: The inner side of the cleaning plate (18) is provided with threads, and the threads provided on the inner side of the cleaning plate (18) are meshed with threads on the surface of the threaded rod (17).

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