Dustproof sealing device of hydraulic support oil cylinder

Abstract

The utility model relates to the technical field of oil cylinder sealing, and discloses a dustproof sealing device of a hydraulic support oil cylinder, which comprises a base and a dustproof sleeve, a piston rod sleeve is arranged at the upper end of the base, a cylinder sleeve is arranged at the lower end of the base, a threaded sleeve is arranged at the upper end of the piston rod sleeve, and the dustproof sleeve is detachably connected with the threaded sleeve. A dust collecting chamber is formed between the inner side of the threaded sleeve and the piston rod, a plurality of sealing rings are arranged on the inner wall of the piston rod sleeve, and a connecting piece is arranged at the lower end of the cylinder barrel sleeve. According to the dustproof sealing device, the front end of the oil cylinder is protected through the base and the dustproof sleeve, dust pollution can be effectively isolated, the oil cylinder is protected against abrasion, the service life of the oil cylinder and the service life of the hydraulic support can be prolonged, disassembly and assembly are convenient, and daily maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinder sealing, in particular to a dustproof sealing device for an oil cylinder of a hydraulic support. Background Art

[0002] The hydraulic support is a structure used to control the mine pressure at the mining face. The mine pressure at the mining face acts on the hydraulic support in the form of external load, so that the combined force of the supporting parts of the hydraulic support and the combined force of the external load acting on the hydraulic support by the roof are exactly on the same straight line, thereby ensuring the safety of the mining face and preventing collapse.

[0003] Hydraulic supports generally use oil cylinders as the core components of bearing support force, and adjust the support angle of the top plate by adjusting the extension and contraction of the oil cylinder. However, due to the harsh working environment of hydraulic supports, a large amount of dust will be generated during the mining process, and this dust will adhere to the piston rod of the oil cylinder. Over time, as the piston rod expands and contracts, it slowly enters the cylinder body, causing wear on the cylinder wall and the piston, which in turn leads to oil leakage, unstable pressure, and the hydraulic support will topple over, slide down, and other problems, posing a high safety hazard.

[0004] Therefore, it is necessary to design a dustproof sealing device for the hydraulic support cylinder to solve the above problems. Utility Model Content

[0005] To achieve the above-mentioned purpose, the utility model proposes a dustproof sealing device for a hydraulic support cylinder, comprising a base and a dustproof sleeve, a piston rod sleeve is provided at the upper end of the base, and a cylinder sleeve is provided at the lower end, a threaded sleeve is provided at the upper end of the piston rod sleeve, the dustproof sleeve and the threaded sleeve are detachably connected, a dust collecting chamber is formed between the inner side of the threaded sleeve and the piston rod, a plurality of sealing rings are provided on the inner wall of the piston rod sleeve, and a connecting piece is provided at the lower end of the cylinder sleeve.

[0006] Furthermore, a dustproof ring is provided at the front end of the dustproof sleeve, and the front end of the dustproof ring is inclined toward one side of the piston rod.

[0007] Furthermore, a plurality of oil filling holes are arranged at intervals on the piston rod sleeve, and sealing screw plugs are arranged on the outer sides of the oil filling holes.

[0008] Furthermore, a rubber pad is provided on the inner wall of the cylinder sleeve.

[0009] Furthermore, the connecting piece is a bolt, a screw hole is provided at the bottom of the cylinder sleeve, and the bolt passes through a connecting block on the outer wall of the cylinder and is connected to the screw hole.

[0010] Furthermore, the connecting member includes a fixed block, an arc-shaped pressing block and a clamping bolt. The fixed block is arranged at intervals at the bottom of the cylinder, and the clamping bolt passes through the fixed block and is rotatably connected to the arc-shaped pressing block.

[0011] Furthermore, a rotating sleeve is provided on the outer end surface of the arc-shaped pressing block, and a limiting block is provided at the end of the clamping bolt, and the limiting block is rotatably arranged in the rotating sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The dustproof sealing device of the utility model protects the front end of the oil cylinder through the base and the dustproof sleeve, which can effectively isolate dust pollution and protect the oil cylinder from wear, which is beneficial to prolonging the service life of the oil cylinder and the hydraulic support, and is easy to disassemble and assemble, and is convenient for daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0015] Figure 2 This is an axial structural cross-sectional view of the first embodiment of the utility model;

[0016] Figure 3 for Figure 2 A magnified view of the local structure at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0018] Figure 5 This is a radial structural cross-sectional view of the second embodiment of the utility model;

[0019] Figure 6 for Figure 5 A magnified view of the local structure at point B in the middle.

[0020] In the figure:

[0021] 1-dust cover, 2-piston rod cover, 3-cylinder sleeve, 4-threaded sleeve, 5-dust collecting chamber, 6-sealing ring, 7-piston rod, 8-dust cover, 9-oil filling hole, 10-sealing screw plug, 11-rubber pad, 12-cylinder, 13-bolt, 14-screw hole, 15-connecting block, 16-fixing block, 17-arc pressure block, 18-tightening bolt, 19-rotating sleeve, 20-limiting block. DETAILED DESCRIPTION

[0022] 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.

[0023] Embodiment 1:

[0024] like Figure 1-3 As shown, the dustproof sealing device of the hydraulic support cylinder in this embodiment includes a base and a dustproof sleeve 1. A piston rod sleeve 2 is provided at the upper end of the base, a cylinder sleeve 3 is provided at the lower end, a threaded sleeve 4 is provided at the upper end of the piston rod sleeve 2, and the dustproof sleeve 1 and the threaded sleeve 4 are detachably connected.

[0025] A dust collecting chamber 5 is formed between the inner side of the threaded sleeve 4 and the piston rod 7 for collecting dust entering the device; a plurality of sealing rings 6 are provided on the inner wall of the piston rod sleeve 2, and a connecting piece is provided at the lower end of the cylinder sleeve 3.

[0026] A dust ring 8 is provided at the front end of the dust cover 1. The front end of the dust ring 8 is inclined toward the piston rod 7 and is tightly attached to the outer wall of the piston rod 7. A plurality of oil filling holes 9 are provided at intervals on the piston rod cover 2. A sealing screw plug 10 is provided on the outer side of the oil filling hole 9. Lubricating oil can be added to the inside of the piston rod cover 2 through the oil filling hole 9.

[0027] The inner wall of the cylinder sleeve 3 is provided with a rubber pad 11 , through which the rubber pad 11 can fit tightly with the cylinder 12 , thereby improving the connection stability between the cylinder sleeve 3 and the cylinder 12 .

[0028] The connecting member in this embodiment is a bolt 13, and a screw hole 14 is provided at the bottom of the cylinder sleeve 3. The bolt 13 passes through a connecting block 15 on the outer wall of the cylinder 12 and is connected to the screw hole 14, thereby fixing the cylinder sleeve 3 on the outer wall of the cylinder 12. This embodiment is suitable for a cylinder structure with a connecting block on the outer wall of the cylinder 12.

[0029] Embodiment 2:

[0030] like Figure 4-6 As shown, the dustproof sealing device of the hydraulic support cylinder in this embodiment, its connecting parts include a fixed block 16, an arc-shaped pressure block 17 and a clamping bolt 18. The fixed block 16 is arranged at intervals at the bottom of the cylinder barrel 12, and the clamping bolt 18 passes through the fixed block 16 and is rotatably connected to the arc-shaped pressure block 17.

[0031] A rotating sleeve 19 is provided on the outer end face of the arc-shaped pressure block 17, and a limit block 20 is provided at the end of the clamping bolt 18. The limit block 20 is rotatably arranged in the rotating sleeve 19. The arc-shaped pressure block 17 is pressed against the outer wall of the cylinder 12 by rotating the clamping bolt 18 to realize the connection between the cylinder sleeve 3 and the cylinder 12. This embodiment is suitable for the cylinder structure without a connecting block on the outer wall of the cylinder 12.

[0032] The working principle of the device is briefly described below in conjunction with the above embodiments:

[0033] When in use, firstly sleeve the cylinder sleeve 3 on the outer wall of the cylinder 12, and sleeve the piston rod sleeve 2 on the outer wall of the piston rod 7, then lock the base on the cylinder through the connecting piece, and then pass the dust cover 1 through the piston rod 7 and connect it with the threaded sleeve 4 to complete the fixed connection between the base, cylinder and dust cover 1.

[0034] During operation, the dust cover 1 plays a preliminary dust-proof role for the piston rod 7, and can isolate most of the dust from entering the oil cylinder along the gap between the piston rod 7 and the dust cover 1. Some dust will enter the dust collecting chamber 5. After using it for a period of time, the dust cover 1 can be removed for cleaning.

[0035] The multiple sealing rings 6 on the piston rod sleeve 2 can further seal the piston rod 7 to prevent dust from entering the cylinder barrel 12, effectively isolate dust pollution, protect the oil cylinder from wear, and help extend the service life of the oil cylinder and the hydraulic support. The device is easy to disassemble and assemble, and is convenient for daily maintenance.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof sealing device for a hydraulic support cylinder, characterized in that: It includes a base and a dust cover, wherein the upper end of the base is provided with a piston rod cover, and the lower end is provided with a cylinder cover, the upper end of the piston rod cover is provided with a threaded cover, the dust cover and the threaded cover are detachably connected, a dust collecting chamber is formed between the inner side of the threaded cover and the piston rod, a plurality of sealing rings are provided on the inner wall of the piston rod cover, and a connecting piece is provided at the lower end of the cylinder cover.

2. The dustproof sealing device for the hydraulic support cylinder according to claim 1 is characterized in that: A dustproof ring is arranged at the front end of the dustproof sleeve, and the front end of the dustproof ring is inclined toward one side of the piston rod.

3. The dustproof sealing device for the hydraulic support cylinder according to claim 1 is characterized in that: The piston rod sleeve is provided with a plurality of oil filling holes at intervals, and a sealing screw plug is provided on the outer side of the oil filling hole.

4. The dustproof sealing device for the hydraulic support cylinder according to claim 1 is characterized in that: The inner wall of the cylinder sleeve is provided with a rubber pad.

5. The dustproof sealing device for the hydraulic support cylinder according to any one of claims 1 to 4, characterized in that: The connecting piece is a bolt, and a screw hole is provided at the bottom of the cylinder sleeve. The bolt passes through a connecting block on the outer wall of the cylinder and is connected to the screw hole.

6. The dustproof sealing device for the hydraulic support cylinder according to any one of claims 1 to 4, characterized in that: The connecting member comprises a fixed block, an arc-shaped pressing block and a clamping bolt. The fixed block is arranged at intervals at the bottom of the cylinder, and the clamping bolt passes through the fixed block and is rotatably connected to the arc-shaped pressing block.

7. The dustproof sealing device for the hydraulic support cylinder according to claim 6 is characterized in that: A rotating sleeve is provided on the outer end surface of the arc-shaped pressing block, and a limiting block is provided at the end of the clamping bolt. The limiting block is rotatably arranged in the rotating sleeve.

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