Leak-proof device for hydraulic oil cylinder

Abstract

The utility model relates to the technical field of leakproof devices, and discloses a leakproof device for a hydraulic oil cylinder, which comprises a hydraulic oil cylinder body, a piston rod is slidably connected in the hydraulic oil cylinder body, and one end of the piston rod penetrates through the hydraulic oil cylinder body and extends to the outer side of the hydraulic oil cylinder body. The hydraulic oil cylinder has the advantages that under the action of the blocking plate springs, the first blocking plate and the second blocking plate can be pushed to move at the same time, the hydraulic oil cylinder body can be blocked from the first connecting pipe and the second connecting pipe, and therefore the hydraulic oil cylinder is convenient to use. The hydraulic oil pipe does not need to bear the pressure of hydraulic oil in the hydraulic oil cylinder body, the situation that the hydraulic oil pipe is broken and hydraulic oil leaks due to the fact that the pressure of the hydraulic oil is too large is avoided, the joint of the piston rod and the hydraulic oil cylinder body can be sealed through the rubber pad, and therefore the service life of the hydraulic oil cylinder is prolonged.

Description

Technical Field

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

[0002] The hydraulic cylinder is a linear actuator, and its output force is proportional to the effective area of ​​the piston and the pressure difference on both sides. Its function is to convert hydraulic energy into mechanical energy. The input of the hydraulic cylinder is the flow rate and pressure of the liquid, and the output is the linear speed and force.

[0003] At present, most hydraulic cylinders can convert hydraulic energy into mechanical energy in actual application, so that the subsequent staff can make better use of the hydraulic cylinders. However, during use, since the hydraulic cylinders are under high pressure for a long time, the pressure between the oil supply pipe and the hydraulic cylinder will also increase. Therefore, it is very easy to cause the pipeline to rupture in the long run, resulting in hydraulic oil leakage. At the same time, under high pressure, the connection between the hydraulic cylinder and the piston rod will also cause leakage, resulting in a shortened service life of the hydraulic cylinder. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a leakage prevention device for a hydraulic oil cylinder.

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

[0006] A leakage prevention device for a hydraulic oil cylinder, comprising a hydraulic oil cylinder body, a piston rod is slidably connected inside the hydraulic oil cylinder body, one end of the piston rod penetrates the hydraulic oil cylinder body and extends to the outside thereof, a leakage prevention shell is fixedly connected to one side of the hydraulic oil cylinder body, a placement groove is provided inside the leakage prevention shell, a leakage prevention mechanism is slidably connected inside the leakage prevention shell, a first connecting pipe and a second connecting pipe are provided on one side of the leakage prevention shell, the first connecting pipe and the second connecting pipe both penetrate the leakage prevention shell and communicate with the inside of the hydraulic oil cylinder body;

[0007] The anti-leakage mechanism includes a connecting rod, a first blocking plate, a second blocking plate and a blocking plate spring, one end of the connecting rod passes through the inner wall of the anti-leakage shell and extends to the other side thereof, one end of the first blocking plate is fixedly connected to one end of the connecting rod, one end of the second blocking plate is fixedly connected to the other end of the connecting rod, two connecting holes are provided at one end of the first blocking plate and the second blocking plate, the blocking plate spring is arranged between the inner wall of the anti-leakage shell and the first blocking plate, the blocking plate spring is sleeved on one end of the connecting rod and movably connected to the first blocking plate, and the other end of the connecting rod is provided with a blocking plate spring.

[0008] Preferably, a push pipe is opened inside the anti-leakage shell, and the push pipe is connected to the placement groove. Push rods are fixedly connected below the first blocking plate and the second blocking plate, and the push rods are slidably connected to the inside of the anti-leakage shell through the push pipe. A bypass pipe is connected below the first connecting pipe and the second connecting pipe, and the bypass pipe is connected to the push pipe.

[0009] Preferably, a pressure plate is fixedly connected to the top of the hydraulic cylinder body, and a rubber pad is fixedly connected to the bottom of the pressure plate. The pressure plate and the rubber pad are both sleeved on the piston rod and slidably connected to the piston rod. A first threaded rod is arranged above the pressure plate, and one end of the first threaded rod passes through the pressure plate, the rubber pad and the hydraulic cylinder body for threaded connection.

[0010] Preferably, a scraper sleeve is fixedly connected to the upper part of the piston rod, and the scraper sleeve is arranged on the piston rod and is slidably connected to the piston rod.

[0011] Preferably, a threaded groove is provided below the leakage-proof shell, the threaded groove is communicated with the placement groove, a second threaded rod is provided below the leakage-proof shell, and the second threaded rod is threadedly connected to the leakage-proof shell through the threaded groove.

[0012] Preferably, a sealing ring is provided on the push rod, and the sealing ring is embedded in the push rod and movably connected thereto.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the first blocking plate and the second blocking plate can be pushed to move simultaneously under the action of the blocking plate spring, so that the hydraulic cylinder body and the first connecting pipe and the second connecting pipe can be blocked, so that the hydraulic oil pipe does not need to bear the hydraulic oil pressure inside the hydraulic cylinder body, thereby preventing the hydraulic oil pressure from being too high, causing the hydraulic oil pipe to rupture and causing hydraulic oil leakage.

[0015] 2. In the utility model, the connection between the piston rod and the hydraulic cylinder body can be sealed by the rubber pad, and the foreign matter attached to the surface of the piston rod during the reciprocating motion can be scraped off by the scraper sleeve, thereby preventing the foreign matter from penetrating into the interior of the piston rod and the hydraulic cylinder body, causing the piston rod to wear and causing hydraulic oil leakage, thereby increasing the service life of the piston rod and the hydraulic cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the anti-leakage device for the hydraulic cylinder in the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the hydraulic cylinder body in the utility model.

[0018] Figure 3It is a schematic diagram of the connection structure of the anti-leakage mechanism in the utility model.

[0019] Figure 4 It is a schematic diagram of the connection structure of the bypass pipe in the utility model.

[0020] Figure 5 It is a schematic diagram of the planar structure of the rubber pad and the scraping sleeve in the utility model.

[0021] Figure 6 It is an enlarged structural schematic diagram of the second threaded rod and the anti-leakage housing in the utility model.

[0022] Figure 7 It is an enlarged structural schematic diagram of the sealing ring in the utility model.

[0023] Legend:

[0024] 1. Hydraulic cylinder body; 2. Piston rod; 3. Anti-leakage housing; 4. First connecting pipe; 5. Second connecting pipe; 6. Anti-leakage mechanism; 61. Connecting rod; 62. First blocking plate; 63. Second blocking plate; 64. Blocking plate spring; 7. Placement groove; 8. Connecting hole; 9. Push pipe; 10. Push rod; 11. Bypass pipe; 12. Pressing plate; 13. First threaded rod; 14. Rubber pad; 15. Scraping sleeve; 16. Threaded groove; 17. Second threaded rod; 18. Sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-7 , the utility model provides an embodiment: a leakage prevention device for a hydraulic cylinder, comprising a hydraulic cylinder body 1, a piston rod 2 is slidably connected inside the hydraulic cylinder body 1, one end of the piston rod 2 penetrates the hydraulic cylinder body 1 and extends to the outside thereof, a leakage prevention shell 3 is fixedly connected to one side of the hydraulic cylinder body 1, a placement groove 7 is provided inside the leakage prevention shell 3, a leakage prevention mechanism 6 is slidably connected inside the leakage prevention shell 3, the leakage prevention shell 3 is used to fix the leakage prevention mechanism 6, the leakage prevention mechanism 6 is used to prevent leakage of the hydraulic cylinder body 1, a first connecting pipe 4 and a second connecting pipe 5 are arranged on one side of the leakage prevention shell 3, the first connecting pipe 4 and the second connecting pipe 5 both penetrate the leakage prevention shell 3 and are connected to the inside of the hydraulic cylinder body 1, and the first connecting pipe 4 and the second connecting pipe 5 are used to provide hydraulic oil to the hydraulic cylinder body 1;

[0027] The anti-leakage mechanism 6 includes a connecting rod 61, a first blocking plate 62, a second blocking plate 63 and a blocking plate spring 64. One end of the connecting rod 61 passes through the inner wall of the anti-leakage shell 3 and extends to the other side thereof. One end of the first blocking plate 62 is fixedly connected to one end of the connecting rod 61, and one end of the second blocking plate 63 is fixedly connected to the other end of the connecting rod 61. Two connecting holes 8 are provided at one end of the first blocking plate 62 and the second blocking plate 63. The blocking plate spring 64 is arranged between the inner wall of the anti-leakage shell 3 and the first blocking plate 62. The blocking plate spring 64 is sleeved on one end of the connecting rod 61 and movably connected to it. The other end of the connecting rod 61 is provided with a blocking plate spring 64.

[0028] Through the above technical solution, by setting up the anti-leakage mechanism 6, under the action of the blocking plate spring 64, the first blocking plate 62 and the second blocking plate 63 can be pushed to move at the same time, and the hydraulic cylinder body 1 and the first connecting pipe 4 and the second connecting pipe 5 can be blocked, so that the hydraulic oil pipe does not need to bear the hydraulic oil pressure inside the hydraulic cylinder body 1, thereby preventing the hydraulic oil pressure from being too high and causing the hydraulic oil pipe to rupture, causing the hydraulic oil to leak.

[0029] Specifically, a push pipe 9 is opened inside the anti-leakage shell 3, and the push pipe 9 is connected to the placement groove 7. Push rods 10 are fixedly connected below the first blocking plate 62 and the second blocking plate 63. The push rod 10 is slidably connected to the inside of the anti-leakage shell 3 through the push pipe 9. A bypass pipe 11 is connected below the first connecting pipe 4 and the second connecting pipe 5, and the bypass pipe 11 is connected to the push pipe 9.

[0030] Through the above technical solution and the above arrangement, when oil is supplied to the inside of the hydraulic oil cylinder body 1 through the first connecting pipe 4 or the second connecting pipe 5, under the interruption of the anti-leakage mechanism 6, the hydraulic oil enters the inner wall of the push pipe 9 through the bypass pipe 11, so that the push rod 10 can be pushed under the pressure of the hydraulic oil to drive the first blocking plate 62 or the second blocking plate 63 to move, so that the connecting hole 8 on the first blocking plate 62 or the second blocking plate 63 is connected to the hydraulic oil cylinder body 1. The first connecting pipe 4 or the second connecting pipe 5 is connected, so that oil can be supplied to the inside of the hydraulic oil cylinder body 1.

[0031] Specifically, a pressure plate 12 is fixedly connected to the top of the hydraulic cylinder body 1, and a rubber pad 14 is fixedly connected to the bottom of the pressure plate 12. Both the pressure plate 12 and the rubber pad 14 are sleeved on the piston rod 2 and slidably connected to it. A first threaded rod 13 is arranged above the pressure plate 12, and one end of the first threaded rod 13 passes through the pressure plate 12, the rubber pad 14 and the hydraulic cylinder body 1 and is threadedly connected thereto.

[0032] Through the above technical solution, by setting the rubber pad 14, the connection between the hydraulic cylinder body 1 and the piston rod 2 can be sealed, and through the first threaded rod 13 and the pressure plate 12, the rubber pad 14 can be tightly fitted with the hydraulic cylinder body 1 and the piston rod 2, thereby increasing the sealing performance of the rubber pad 14.

[0033] Specifically, a scraper sleeve 15 is fixedly connected to the top of the piston rod 2, and the scraper sleeve 15 is sleeved on the piston rod 2 and slidably connected thereto.

[0034] Through the above technical solution, by setting the scraper sleeve 15, foreign matter attached to the surface of the piston rod 2 during reciprocating motion can be scraped off, preventing the foreign matter from penetrating into the interior of the piston rod 2 and the hydraulic cylinder body 1, causing wear of the piston rod 2 and leakage of hydraulic oil, thereby increasing the service life of the piston rod 2 and the hydraulic cylinder body 1.

[0035] Specifically, a thread groove 16 is provided below the leakage-proof housing 3 , the thread groove 16 is communicated with the placement groove 7 , a second threaded rod 17 is provided below the leakage-proof housing 3 , and the second threaded rod 17 is threadedly connected to the leakage-proof housing 3 through the thread groove 16 .

[0036] Through the above technical solution, by opening the threaded groove 16 and removing the second threaded rod 17, the hydraulic oil inside the anti-leakage housing 3 can be discharged to prevent excessive hydraulic oil therein from affecting the function of the blocking plate spring 64 and making the first blocking plate 62 or the second blocking plate 63 unable to move normally.

[0037] Specifically, a sealing ring 18 is provided on the push rod 10 , and the sealing ring 18 is embedded in the push rod 10 and movably connected thereto.

[0038] Through the above technical solution, by providing the sealing ring 18, it is possible to prevent the hydraulic oil from penetrating from the propulsion pipe 9 into the interior of the anti-leakage housing 3, thereby playing a role in sealing the propulsion pipe 9.

[0039] Working principle: In a static state, under the action of the blocking plate springs 64 provided at both ends of the connecting rod 61, the first blocking plate 62 and the second blocking plate 63 are pushed to move at the same time, so that the first blocking plate 62 and the second blocking plate 63 are always kept in the middle position of the anti-leakage housing 3, so as to block the hydraulic cylinder body 1 and the first connecting pipe 4 and the second connecting pipe 5, so that the hydraulic oil pipe does not need to bear the hydraulic oil pressure inside the hydraulic cylinder body 1, so as to prevent the hydraulic oil pressure from being too high, causing the hydraulic oil pipe to rupture and causing the hydraulic oil to leak. At the same time, if the hydraulic oil is leaked through the first When the connecting pipe 4 supplies oil to the inside of the hydraulic cylinder body 1, the anti-leakage mechanism 6 blocks the first connecting pipe 4 from being connected to the hydraulic cylinder body 1. At this time, the hydraulic oil will enter the inside of the pushing pipe 9 through the bypass pipe 11, so that under the pressure of the hydraulic oil, the push rod 10 can be pushed to drive the second blocking plate 63 to move, so that the position of the connecting hole 8 is moved, so that the first connecting pipe 4 and the hydraulic cylinder body 1 are connected, so that the hydraulic cylinder body 1 can be supplied with oil. At the same time, when the second blocking plate 63 moves, the first blocking plate 62 will also move, thereby changing The position of the connecting hole 8 is changed to make the second connecting pipe 5 communicate with the hydraulic cylinder body 1, relieve the pressure on the hydraulic cylinder body 1, and discharge the hydraulic oil. When the oil is supplied to the inside of the hydraulic cylinder body 1 through the second connecting pipe 5, the working principle is the same as the above. At the same time, under the action of the hydraulic cylinder body 1, the hydraulic oil will slowly penetrate into the inside of the anti-leakage housing 3. At this time, the hydraulic pressure inside the anti-leakage housing 3 can be discharged by disassembling the second threaded rod 17 to prevent the hydraulic oil inside the anti-leakage housing 3 from being excessive, which affects the function of the anti-leakage mechanism 6 in the anti-leakage housing 3. The rubber pad 14 can be arranged to seal the connection between the hydraulic cylinder body 1 and the piston rod 2. The rubber pad 14 can be tightly fitted with the hydraulic cylinder body 1 and the piston rod 2 through the first threaded rod 13 and the pressure plate 12, thereby increasing the sealing performance of the rubber pad 14. The scraper sleeve 15 can be arranged to scrape off foreign matter attached to the surface of the piston rod 2 during the reciprocating motion, thereby preventing foreign matter from penetrating into the interior of the piston rod 2 and the hydraulic cylinder body 1, causing wear of the piston rod 2 and leakage of hydraulic oil, thereby increasing the service life of the piston rod 2 and the hydraulic cylinder body 1.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A leakage prevention device for a hydraulic cylinder, comprising a hydraulic cylinder body (1), characterized in that: The interior of the hydraulic cylinder body (1) is slidably connected to a piston rod (2), one end of the piston rod (2) penetrates the hydraulic cylinder body (1) and extends to the outside thereof, one side of the hydraulic cylinder body (1) is fixedly connected to an anti-leakage shell (3), a placement groove (7) is provided inside the anti-leakage shell (3), an anti-leakage mechanism (6) is slidably connected inside the anti-leakage shell (3), one side of the anti-leakage shell (3) is provided with a first connecting pipe (4) and a second connecting pipe (5), the first connecting pipe (4) and the second connecting pipe (5) both penetrate the anti-leakage shell (3) and are connected to the interior of the hydraulic cylinder body (1); The anti-leakage mechanism (6) comprises a connecting rod (61), a first blocking plate (62), a second blocking plate (63) and a blocking plate spring (64); one end of the connecting rod (61) passes through the inner wall of the anti-leakage shell (3) and extends to the other side thereof; one end of the first blocking plate (62) is fixedly connected to one end of the connecting rod (61); one end of the second blocking plate (63) is fixedly connected to the other end of the connecting rod (61); one end of the first blocking plate (62) and the second blocking plate (63) are both provided with two connecting holes (8); the blocking plate spring (64) is arranged between the inner wall of the anti-leakage shell (3) and the first blocking plate (62); the blocking plate spring (64) is sleeved on one end of the connecting rod (61) and movably connected thereto; the other end of the connecting rod (61) is provided with a blocking plate spring (64).

2. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: A push pipe (9) is provided inside the leak-proof shell (3), and the push pipe (9) is communicated with the placement groove (7). Push rods (10) are fixedly connected below the first blocking plate (62) and the second blocking plate (63), and the push rods (10) are slidably connected to the inside of the leak-proof shell (3) through the push pipe (9). A bypass pipe (11) is communicated below the first connecting pipe (4) and the second connecting pipe (5), and the bypass pipe (11) is communicated with the push pipe (9).

3. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: A pressure plate (12) is fixedly connected to the top of the hydraulic cylinder body (1), and a rubber pad (14) is fixedly connected to the bottom of the pressure plate (12). The pressure plate (12) and the rubber pad (14) are both sleeved on the piston rod (2) and slidably connected thereto. A first threaded rod (13) is arranged above the pressure plate (12), and one end of the first threaded rod (13) passes through the pressure plate (12), is threadedly connected to the rubber pad (14) and the hydraulic cylinder body (1).

4. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: A scraper sleeve (15) is fixedly connected to the upper side of the piston rod (2), and the scraper sleeve (15) is sleeved on the piston rod (2) and slidably connected thereto.

5. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: A threaded groove (16) is provided below the leakage-proof shell (3), and the threaded groove (16) is communicated with the placement groove (7). A second threaded rod (17) is provided below the leakage-proof shell (3), and the second threaded rod (17) is threadedly connected to the leakage-proof shell (3) through the threaded groove (16).

6. The anti-leakage device for a hydraulic cylinder according to claim 2, characterized in that: The push rod (10) is provided with a sealing ring (18), and the sealing ring (18) is embedded in the push rod (10) and movably connected thereto.

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