Anti-fouling sealing structure of large vertical oil cylinder guide sleeve

Abstract

The invention relates to the technical field of hydraulic cylinder equipment, and particularly discloses an antifouling sealing structure of a large vertical oil cylinder guide sleeve, which comprises a sealing structure and a cleaning structure, and the cleaning structure is detachably arranged on the sealing structure; wherein the sealing structure is used for sealing the hydraulic oil cylinder, and the cleaning structure is used for sealing in a matched mode and cleaning the surface of a piston rod of a cylinder body. Through the detachable form of the sealing sleeve, the sealing rings are convenient to install, and effective interception and sealing of telescopic paths of the piston rods at the two ends of the sealing sleeve are achieved through the multiple sealing rings and the conical design; a cleaning structure is mounted according to a detachable sealing sleeve in a matched manner, so that the outer wall of the piston rod is effectively cleaned during contraction and is prevented from entering the oil cylinder; meanwhile, a rotating sealing gear ring in the cleaning structure is designed to be in a stepped structure and is movably arranged to be matched with a sealing sleeve, so that auxiliary sealing is further achieved, circumferential rotation is guaranteed, and overall convenient installation, pollution prevention and pollution cleaning are achieved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder equipment technology, specifically to a contamination-proof sealing structure for a guide sleeve of a large vertical hydraulic cylinder. Background Technology

[0002] In the industrial field, large vertical hydraulic cylinders, as the core actuators of hydraulic systems, are widely used in metallurgy, mining, engineering machinery, heavy equipment and other scenarios, undertaking the key functions of driving heavy objects to lift, tilt or reciprocate. Their operational reliability directly determines the production efficiency and safety stability of the entire set of equipment. As an important component of the hydraulic cylinder, the guide sleeve not only needs to provide precise guidance for the piston rod to prevent radial deviation during reciprocating motion, but also needs to block the intrusion of external contaminants and prevent internal hydraulic oil leakage through the sealing structure. However, in practical applications, the sealing structure of the guide sleeve of large vertical hydraulic cylinders is generally prone to sealing failure due to the intrusion of external contaminants. Moreover, the sealing sleeve is mostly a one-piece fixed type, and multiple sealing rings need to be set inside. The sealing rings need to be compressed and deformed before they can be installed, which is inconvenient. Since the application scenarios of large vertical hydraulic cylinders are mostly harsh environments with dense dust and many impurities, the outer surface of the piston rod is prone to the accumulation of oil sludge over a long period of time due to the adhering contaminants such as dust, metal shavings, and coolant residues on the oil during the reciprocating extension and retraction process. Summary of the Invention

[0003] This invention proposes a fouling-proof sealing structure for a large vertical hydraulic cylinder guide sleeve, aiming to solve the technical problems of inconvenient installation and oil sludge accumulation in existing hydraulic cylinder guide sleeves.

[0004] To address the aforementioned problems, the present invention provides the following technical solution: a contamination-proof sealing structure for a large vertical hydraulic cylinder guide sleeve, characterized in that it includes a sealing structure and a cleaning structure, wherein the cleaning structure is detachably mounted on the sealing structure; wherein the sealing structure is used for sealing the hydraulic cylinder, and the cleaning structure is used for sealing and cleaning the piston rod surface of the cylinder body.

[0005] Preferably, the sealing structure includes a pair of sealing sleeves, two pairs of connecting rods, and several connecting bolts; the pair of sealing sleeves are detachably spliced ​​together, both of the sealing sleeves are rectangular, and each has a rod opening through the center of its opposite sidewall; each of the pair of sealing sleeves has symmetrical mating grooves on its opposite sidewalls, with the mating grooves near the four corners; each of the pair of sealing sleeves has symmetrical T-shaped semi-circular grooves on the center of its upper wall; each of the pair of sealing sleeves has a pair of first sealing grooves on the center of its opposite sidewalls, with the first sealing grooves being symmetrically opposite near the upper and lower ends; and the center of each of the pair of sealing sleeves has... Each of the two sealing sleeves has a pair of semi-circular second sealing grooves, with the second sealing grooves near the top. Below each of the second sealing grooves, there is a semi-circular third sealing groove. The front and rear side walls of each pair of sealing sleeves have countersunk threaded holes that communicate with the mating grooves. The upper walls of each pair of sealing sleeves have mounting through holes near the two corners. The upper wall of one of the sealing sleeves has a pair of L-shaped sliding grooves. One end of each of the two pairs of connecting rods is movably inserted into the mating groove of the sealing sleeve. Several connecting bolts are movably screwed into the countersunk threaded holes and screwed into the connecting rods.

[0006] Preferably, the sealing structure further includes a pair of first sealing rings, a pair of second sealing rings, and a third sealing ring; the pair of first sealing rings are respectively movably embedded in the first sealing groove, and the first sealing rings are symmetrical in opposite directions; the pair of second sealing rings are respectively movably embedded in the second sealing groove; the width of the third sealing ring is greater than that of the second sealing rings; and the third sealing ring is movably embedded in the third sealing groove.

[0007] Preferably, both of the first sealing rings are frustoconical annular rings.

[0008] Preferably, the cleaning structure includes a chassis, a pair of lock seats, a motor, a wheel axle, a pair of first gears, a second gear, a sealing toothed ring, and several wiping columns; The chassis is a box without a rear side wall, and the lower rear wall of the chassis has a through-hole. The chassis is detachably mounted on the upper wall of one of the sealing sleeves and located at the slide groove. The pair of lock seats are both L-shaped and are arranged symmetrically in opposite directions on the lower wall of the chassis. The lock seats are movably inserted into the slide groove. The motor is fixedly mounted on the upper wall inside the chassis and close to the front end. The two ends of the wheel axle are movably inserted between the upper and lower walls inside the rear of the chassis and the wheel axle can rotate. The pair of first gears are respectively fixedly mounted on the motor drive end and the top of the wheel axle and the two first gears are meshed with each other. The second gear is fixedly mounted on the bottom end of the wheel axle and moves through the rear side of the chassis. The sealing tooth ring has a stepped structure and the top side wall of the sealing tooth ring has teeth. The sealing tooth ring is movably embedded in the T-shaped rotating groove. Several wiping columns are screwed to the top of the sealing tooth ring at equal intervals.

[0009] Preferably, the axle is a T-shaped rod with a bottom diameter larger than the top diameter.

[0010] Preferably, the sealing toothed ring rotates by meshing with a second gear.

[0011] Preferably, the piston rod of the cylinder can fit into the wiping column.

[0012] Preferably, the sealing toothed ring is relatively clamped and limited by the sealing sleeve, and the stepped structure provides auxiliary sealing.

[0013] The present invention proposes a fouling-proof sealing structure for a large vertical hydraulic cylinder guide sleeve. The advantages are as follows: the detachable design of the sealing sleeve facilitates the installation of sealing rings; multiple sealing rings and a conical design effectively intercept and seal the piston rod extension and contraction paths at both ends of the sealing sleeve; and the detachable sealing sleeve, combined with a cleaning structure, effectively cleans the outer wall of the piston rod during contraction, preventing contamination from entering the cylinder. Simultaneously, the rotating sealing toothed ring in the cleaning structure, with its stepped structure design, is movable and matches the sealing sleeve, further assisting in sealing and ensuring circumferential rotation. This results in convenient installation, effective fouling prevention and cleaning, and improved cylinder lifespan. In summary, the present invention has the following advantages: 1. The sealing assembly is easy to install. The sealing structure adopts a pair of sealing sleeves splicing form. During installation, there is no need to forcibly fit the whole structure into the piston rod or cylinder. Simply connect the two sealing sleeves from both sides of the piston rod, position them with the connecting rod, and tighten the connecting bolts to complete the assembly. At the same time, the first sealing ring, the second sealing ring, and the third sealing ring all correspond to independent first sealing grooves, second sealing grooves, and third sealing grooves, which can be precisely matched. During manual assembly, it is not easy to cause misalignment or extrusion deformation. Even for large guide sleeves, the assembly accuracy requirements can be greatly reduced, the assembly error rate can be reduced, and the installation of internal sealing rings can be facilitated.

[0014] 2. This invention addresses the shortcomings of traditional structures, which suffer from "single sealing and insufficient protection." By employing a differentiated design of multiple sealing rings and the assistance of a stepped sealing tooth ring, a three-dimensional sealing system adapted to harsh working conditions is constructed. A pair of frustoconical first sealing rings installed symmetrically in opposite directions achieve bidirectional sealing. On the side facing outwards from the cylinder, the sealing lip tightly adheres to the piston rod, effectively preventing the intrusion of contaminants such as dust and debris. On the side facing inwards from the cylinder, the frustoconical inclined surface structure of the first sealing ring enhances the sealing pressure on the hydraulic oil, preventing high-pressure oil from leaking due to pressure fluctuations. This solves the problem of traditional structures being able to prevent contamination but not leakage, or preventing leakage but not contamination.

[0015] 3. The sealing toothed ring in the cleaning structure adopts a stepped structure. On the one hand, the clamping and limiting of the sealing sleeve ensures the coaxiality with the piston rod. On the other hand, its stepped surface can form a dynamic sealing interface with the rotating groove of the sealing sleeve. When the sealing toothed ring rotates with the wiping column, the stepped surface can fit against the inner wall of the rotating groove in real time, preventing external contaminants from entering through the connection gap between the cleaning structure and the sealing sleeve. This achieves simultaneous cleaning and sealing protection, avoiding a decrease in sealing performance due to a weakening of the cleaning function.

[0016] 4. Several wiping columns in the cleaning structure are equidistantly screwed onto the top of the sealing toothed ring and fit tightly against the surface of the piston rod. When the motor drives the sealing toothed ring to rotate circumferentially through gear transmission, the wiping columns can rotate 360 ​​degrees along the surface of the piston rod to wipe away solid contaminants such as dust and metal shavings. The rectangular structure and splicing design of the sealing sleeve allow its size to be adjusted according to the diameter of the cylinder piston rod, thus adapting to different specifications of cylinders without redesigning the overall structure and reducing customization costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the disassembled sealing structure of the present invention; Figure 3 This is an internal view of the sealing structure of the present invention; Figure 4 This is a diagram illustrating the first sealing ring of the present invention; Figure 5 This is a schematic diagram illustrating the assembly of the sealing structure of the present invention; Figure 6 This is a schematic diagram of the disassembled cleaning structure of the present invention; Figure 7 This is a diagram showing the internal structure of the cleaning mechanism of the present invention; Figure 8 for Figure 3 A magnified view of section A in the image.

[0018] In the diagram: 1. Sealing structure, 11. Sealing sleeve, 12. Connecting rod, 13. Connecting bolt, 14. First sealing ring, 15. Second sealing ring, 16. Third sealing ring, 2. Cleaning structure, 21. Chassis, 22. Lock seat, 23. Motor, 24. Axle, 25. First gear, 26. Second gear, 27. Sealing tooth ring, 28. Wiping column, 3. Rod opening, 4. Connecting groove, 5. Rotary groove, 6. First sealing groove, 7. Second sealing groove, 8. Third sealing groove, 9. Countersunk threaded hole, 10. Slide groove. Detailed Implementation

[0019] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-8 As shown, the present invention provides a technical solution: a dirt-proof sealing structure for a large vertical hydraulic cylinder guide sleeve, including a sealing structure 1 and a cleaning structure 2, wherein the cleaning structure 2 is detachably mounted on the sealing structure 1; wherein the sealing structure 1 is used for sealing the hydraulic cylinder, and the cleaning structure 2 is used for fitting the seal and cleaning the piston rod surface of the cylinder body.

[0021] As a further embodiment of the present invention, the sealing structure 1 includes a pair of sealing sleeves 11, two pairs of connecting rods 12, several connecting bolts 13, a pair of first sealing rings 14, a pair of second sealing rings 15, and a third sealing ring 16; the pair of sealing sleeves 11 are detachably spliced ​​together, both of the sealing sleeves 11 are rectangular, and each of the opposite sidewalls has a rod opening 3 through it; each of the opposite sidewalls of the pair of sealing sleeves 11 has a symmetrically arranged mating groove 4, and near the four corners of the mating groove 4, each of the upper walls of the pair of sealing sleeves 11 has a symmetrically arranged T-shaped semicircle. The sealing sleeve 11 has a shaped groove 5. A pair of first sealing grooves 6 are formed in the middle of opposite side walls, with the first sealing grooves 6 being symmetrically opposite near the upper and lower ends. A pair of semi-circular second sealing grooves 7 are formed in the middle of opposite side walls, with the second sealing grooves 7 near the top. A semi-circular third sealing groove 8 is formed below each of the second sealing grooves 7. Countersunk threaded holes 9 communicating with the mating groove 4 are formed on the front and rear side walls of the sealing sleeve 11. Installation through holes are formed on the upper wall of the sealing sleeve 11 near the two corners. A pair of L-shaped grooves 10 are formed on the upper wall of a sealing sleeve 11. One end of each of two pairs of connecting rods 12 is movably inserted into the mating groove 4 of the sealing sleeve 11. Several connecting bolts 13 are movably screwed into countersunk threaded holes 9 and into the connecting rods 12. Each pair of first sealing rings 14 is a frustoconical annulus. Each pair of first sealing rings 14 is movably embedded in the first sealing groove 6, and the first sealing rings 14 are symmetrical in opposite directions. The frustoconical shape of the first sealing rings 14 can effectively prevent oil and dirt from leaking out. The two sealing rings 14, 15, and 16 are respectively movably embedded in the second sealing groove 7. The third sealing ring 16 is wider than the second sealing ring 15 and is movably embedded in the third sealing groove 8. The sealing sleeve 11 is connected by the connecting rod 12 to facilitate the installation of the internal first sealing ring 14, second sealing ring 15 and third sealing ring 16. The conical first sealing ring 14 effectively blocks the inlet and outlet rod openings 3 at both ends and scrapes off residual oil or dirt.

[0022] The first sealing ring 14 adopts a pair of frustoconical annular structures. The preferred material is nitrile rubber (suitable for general hydraulic oil conditions) or fluororubber (suitable for high temperature and strong corrosion conditions). The large end diameter of the frustoconical shape is adapted to the annular groove diameter of the first sealing groove 6, the small end diameter is adapted to the piston rod diameter, and the height of the frustoconical shape is consistent with the depth of the first sealing groove 6. A pair of first sealing rings 14 are movably embedded in the first sealing groove 6 after the two sealing sleeves 11 are spliced ​​together, and are arranged in a "reverse symmetrical" manner. The large end of the upper first sealing ring 14 faces the outside of the oil cylinder and the small end is attached to the piston rod, while the large end of the lower first sealing ring 14 faces the inside of the oil cylinder and the small end is attached to the piston rod. When the piston rod reciprocates, the truncated cone surface of the upper first sealing ring 14 can tightly fit the surface of the piston rod, effectively preventing external dust, metal debris, coolant residue and other contaminants from entering the interior of the sealing structure. The truncated cone surface of the lower first sealing ring 14 further presses the piston rod under the action of hydraulic oil pressure, enhancing the sealing effect on the internal hydraulic oil and preventing high-pressure oil from seeping out due to pressure fluctuations, fundamentally solving the contradiction of traditional sealing structures that are "anti-fouling but not anti-leakage, and anti-leakage but not anti-fouling".

[0023] The second sealing ring 15 adopts a pair of O-ring structures, with the same material as the first sealing ring 14, and the cross-sectional diameter is adapted to the depth of the second sealing groove 7, and the inner diameter is adapted to the piston rod diameter; A pair of second sealing rings 15 are respectively movably embedded in the second sealing groove 7 after the two sealing sleeves 11 are spliced ​​together, located below the upper first sealing ring 14, forming a "secondary anti-pollution barrier"; when a small amount of contaminants break through the upper first sealing ring 14, the second sealing ring 15 can further block the contaminants from intruding downwards, while also helping to enhance the sealing redundancy of hydraulic oil, adapting to the high-pressure working environment of large vertical cylinders.

[0024] The third sealing ring 16 adopts a rectangular cross-section structure, is made of high-pressure resistant polyurethane rubber, and its cross-sectional dimensions are adapted to the dimensions of the third sealing groove 8, while its inner diameter is adapted to the piston rod diameter. The third sealing ring 16 is movably embedded in the third sealing groove 8 after the two sealing sleeves 11 are spliced ​​together, and is located below the second sealing ring 15. Since its width is greater than that of the second sealing ring 15, its contact area with the piston rod is larger, which can form a more stable sealing interface under high pressure conditions, and at the same time form a final sealing defense line for the hydraulic oil below.

[0025] As a further embodiment of the present invention, the cleaning structure 2 includes a chassis 21, a pair of lock seats 22, a motor 23, a wheel axle 24, a pair of first gears 25, a second gear 26, a sealing gear ring 27, and several wiping columns 28; the chassis 21 is a box without a rear side wall, and an interlocking opening is provided through the lower rear wall of the chassis 21; the chassis 21 is detachably mounted on the upper wall of one of the sealing sleeves 11 and located at the slide groove 10; both lock seats 22 are L-shaped and are symmetrically arranged in opposite directions on the lower wall of the chassis 21. The lock seat 22 is movably inserted into the slide groove 10. The motor 23 is fixedly installed on the upper wall of the housing 21, near the front end. The two ends of the axle 24 are movably inserted between the upper and lower walls of the rear end of the housing 21, and the axle 24 can rotate. The axle 24 is a T-shaped rod with a bottom diameter larger than the top diameter. A pair of first gears 25 are fixedly installed on the drive end of the motor 23 and the top of the axle 24, respectively, and the two first gears 25 mesh with each other. The second gear 26 is fixedly fitted onto the bottom end of the axle 24, and the second gear 26 movably passes through the machine. On the rear side of the housing 21, the sealing toothed ring 27 has a stepped structure, and the top side wall of the sealing toothed ring 27 is provided with teeth. The sealing toothed ring 27 is movably embedded in the T-shaped rotating groove 5, and several wiping columns 28 are screwed onto the top of the sealing toothed ring 27 at equal intervals. The sealing toothed ring 27 rotates by meshing with the second gear 26, which is used for the design linkage requirements. The housing 21 can be detached from the sealing sleeve 11 and assembled by the locking seat 22 without the need for additional bolts. It is driven by the internal motor 23, and by the first gear 25 and the second toothed ring 26. The drive of wheel 26 enables the rotation of sealing tooth ring 27. Since sealing tooth ring 27 is clamped relative to sealing sleeve 11, sealing tooth ring 27 is located at the top. The stepped structure further improves the sealing performance. During rotation, it drives wiping column 28 to contact piston rod body for cleaning, preventing it from entering the cylinder. Sealing tooth ring 27 is limited by relative clamping of sealing sleeve 11 and provides auxiliary sealing through stepped structure. The piston rod of cylinder body can fit with wiping column 28, which is designed to achieve active cleaning.

[0026] Based on the working signal of the hydraulic cylinder (such as the proximity switch signal triggered by the extension and retraction of the piston rod), the starting motor 23 drives the active first gear 25 to rotate clockwise; the active first gear 25 meshes and drives the driven first gear 25 to rotate counterclockwise, reducing the speed from 1500 rpm to 750 rpm through a 1:2 reduction ratio, and the driven first gear 25 drives the T-shaped wheel shaft 24 to rotate synchronously; the wheel shaft 24 drives the second gear 26 at the bottom to rotate counterclockwise, and the second gear 26 meshes and drives the sealing tooth ring 27 to rotate clockwise (the speed is the same as that of the driven first gear 25, which is 750 rpm); the sealing tooth ring 27 drives the wiping column 28 on it to make a 360-degree circular motion, and the wiping column 28 is in close contact with the surface of the piston rod, scraping off and throwing away contaminants (such as dust and debris) on the surface of the piston rod, preventing contaminants from entering the sealing structure with the piston rod; During the rotation of the sealing toothed ring 27, each step of its stepped structure is always in contact with the inner wall of the T-shaped groove 5 of the sealing sleeve 11, forming a dynamic seal to prevent external contaminants from intruding from the gap between the cleaning structure and the sealing structure, while also helping to enhance the sealing effect at the top of the sealing structure.

[0027] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0028] First, the device inserts the two ends of the connecting rod 12 into the mating groove 4 of the sealing sleeve 11, so that the sealing sleeve 11 of the sealing structure 1 can be assembled and connected. The sealing sleeve 11 and the connecting rod 12 are fixed together by the connecting bolt 13 located in the countersunk threaded hole 9. During the installation of the connecting rod 12, the first sealing ring 14, the second sealing ring 15 and the third sealing ring 16 are sequentially placed into the corresponding first sealing groove 6, second sealing groove 7 and third sealing groove 8 for fitting and fixing. Meanwhile, when the sealing sleeves 11 are in contact, the chassis 21 in the cleaning structure 2 is installed by inserting the L-shaped locking seat 22 into the slide groove 10, and the sealing toothed ring 27 is embedded in the rotating groove 5. This allows the piston rod to extend and retract through the rod opening 3 in the middle of the sealing sleeve 11 during equipment installation and use, and to be effectively isolated and blocked by the first sealing ring 14 set in opposite directions at both ends, and to achieve multi-level sealing protection with the help of the second sealing ring 15 and the third sealing ring 16 in the middle. The motor 23 inside the chassis 21 can also be started, which drives one of the first gears 25 to rotate. The relative meshing of the two first gears 25 drives the axle 24 to rotate, and the rotation of the axle 24 drives the second gear 26 to rotate. Under the rotation of the second gear 26, it meshes with the stepped sealing ring 27, causing the sealing ring 27 to rotate in the groove 5 between the sealing sleeves 11, thereby driving the multiple wiping columns 28 to rotate. The wiping columns 28 contact the piston rod to wipe and clean. The stepped sealing ring 27 also enhances the sealing performance of the sealing sleeve 11.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fouling-proof sealing structure for a guide sleeve of a large vertical hydraulic cylinder, characterized in that, It includes a sealing structure (1) and a cleaning structure (2), wherein the cleaning structure (2) is detachably mounted on the sealing structure (1); wherein the sealing structure (1) is used for sealing the hydraulic cylinder, and the cleaning structure (2) is used for fitting the seal and cleaning the piston rod surface of the cylinder body; The sealing structure (1) includes a pair of sealing sleeves (11), two pairs of connecting rods (12) and several connecting bolts (13); A pair of sealing sleeves (11) are detachably spliced ​​together. Both of the sealing sleeves (11) are rectangular, and each has a rod opening (3) through the middle of its opposite sidewall. The opposite sidewalls of the pair of sealing sleeves (11) are symmetrically provided with mating grooves (4), and the mating grooves (4) are located near the four corners. The upper wall of the pair of sealing sleeves (11) is symmetrically provided with T-shaped semi-circular grooves (5). The opposite sidewalls of the pair of sealing sleeves (11) are provided with a pair of first sealing grooves (6), and the first sealing grooves (6) are symmetrically opposite to each other near the upper and lower ends. The opposite sidewalls of the pair of sealing sleeves (11) are provided with a pair of semi-circular second sealing grooves (7), and the second sealing grooves are... (7) Near the top, a semi-circular third sealing groove (8) is provided below the second sealing groove (7). The front and rear side walls of the pair of sealing sleeves (11) are provided with countersunk threaded holes (9) that communicate with the docking groove (4). The upper walls of the pair of sealing sleeves (11) and near the two corners are provided with installation through holes. The upper wall of one of the sealing sleeves (11) is provided with a pair of L-shaped sliding grooves (10). One end of the two pairs of connecting rods (12) is movably inserted into the docking groove (4) of the sealing sleeve (11). Several connecting bolts (13) are movably screwed into the countersunk threaded holes (9) and the connecting bolts (13) are screwed into the connecting rods (12).

2. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 1, characterized in that, The sealing structure (1) further includes a pair of first sealing rings (14), a pair of second sealing rings (15), and a third sealing ring (16). A pair of first sealing rings (14) are respectively movably embedded in the first sealing groove (6), and the first sealing rings (14) are symmetrical in opposite directions. A pair of second sealing rings (15) are respectively movably embedded in the second sealing groove (7). The width of the third sealing ring (16) is greater than that of the second sealing rings (15), and the third sealing ring (16) is movably embedded in the third sealing groove (8).

3. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 2, characterized in that, Both of the first sealing rings (14) are frustoconical annular rings.

4. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 3, characterized in that, The cleaning structure (2) includes a chassis (21), a pair of lock seats (22), a motor (23), axle (24), a pair of first gears (25), second gears (26), a sealing tooth ring (27), and several wiping columns (28). The chassis (21) is a box without a rear side wall, and the lower rear wall of the chassis (21) is provided with a through-hole. The chassis (21) is detachably mounted on the upper wall of one of the sealing sleeves (11) and located at the slide groove (10). The pair of lock seats (22) are both L-shaped. The pair of lock seats (22) are arranged symmetrically in opposite directions on the lower wall of the chassis (21), and the lock seats (22) are movably inserted into the slide groove (10). The motor (23) is fixedly mounted on the upper wall inside the chassis (21) and close to the front end. The two ends of the axle (24) are movably inserted between the upper and lower walls inside the rear end of the chassis (21), and the axle (24) is detachably mounted on the upper wall of one of the sealing sleeves (11) and located at the slide groove (10). 4) It can rotate. A pair of first gears (25) are fixedly installed on the drive end of the motor (23) and the top of the wheel axle (24), and the two first gears (25) mesh with each other. The second gear (26) is fixedly fitted on the bottom end of the wheel axle (24), and the second gear (26) moves through the rear side of the chassis (21). The sealing tooth ring (27) has a stepped structure, and the top side wall of the sealing tooth ring (27) is provided with teeth. The sealing tooth ring (27) is movably embedded in the T-shaped rotating groove (5). Several wiping columns (28) are equidistantly screwed onto the top of the sealing tooth ring (27).

5. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 4, characterized in that, The axle (24) is a T-shaped rod with a bottom diameter larger than the top diameter.

6. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 5, characterized in that, The sealing ring (27) rotates by meshing with the second gear (26).

7. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 6, characterized in that, The piston rod of the cylinder can fit against the wiping column (28).

8. The anti-fouling sealing structure for a large vertical hydraulic cylinder guide sleeve according to claim 7, characterized in that, The sealing toothed ring (27) is relatively clamped and limited by the sealing sleeve (11), and is further sealed by a stepped structure.

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