Hoisting device for mill lining plate bolt dismounting tool

Abstract

The utility model provides a hoisting device for a mill lining plate bolt dismounting tool, and relates to the technical field of hoisting. Flanges at the tops of two bidirectional multi-section hydraulic cylinders are fixed with the two ends of a cross beam into a whole, the two bidirectional multi-section hydraulic cylinders are connected with a hydraulic station, an oil pipe and a control valve, and the control valve controls oil feeding of the bidirectional multi-section hydraulic cylinders to enable the bidirectional multi-section hydraulic cylinders to rise or controls oil returning of the hydraulic cylinders, so that a telescopic portal frame capable of being hidden in a working platform is formed. A pulley is installed on the cross beam, and a rechargeable electric chain hoist is hung below the pulley. Hydraulic compression oil is used as a power source, the control valve is manually operated to control the two bidirectional multi-section hydraulic oil cylinders to lift or drop the portal frame in the vertical direction, the pulley can be manually moved transversely, a row of bolts of a mill barrel can be disassembled, the bolt disassembling time is saved, the labor intensity of manually lifting a pneumatic wrench and a pneumatic hammer is reduced, and the working efficiency is improved. And the cross beam and the pulley are simple to manufacture and mount, and can be hidden under the working platform after being used to reasonably utilize the space.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting, in particular to a hoisting device for a mill liner bolt removal tool. Background Art

[0002] There are many large-scale nonferrous metal mines in China, and large-diameter mills are the preferred main grinding equipment. Due to the large amount of ore processed, the liner life cycle is short. Large-diameter mills have many liner plates and are designed with more fixing bolts. When removing the liner bolts of large-diameter mills, they must be done on a self-made work platform near the mill. The tools used are generally heavy-duty pneumatic tools. Heavy-duty pneumatic tools are large in size and heavy in weight. Long-term hand-held operation brings great labor intensity to the liner replacement personnel, and also poses safety risks. Utility Model Content

[0003] The purpose of this utility model is to solve the problems existing in the above-mentioned prior art and provide a hoisting device for mill liner bolt removal tool.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A hoisting device for a mill liner bolt removal tool, comprising: a bidirectional multi-section hydraulic cylinder, embedded bolts, a crossbeam, a pulley, a rechargeable chain electric hoist, an operating handle, an oil pipe, a hydraulic station, a control valve, a working platform and a cover plate.

[0006] The working platform is two L-shaped steel plates, one side of the two L-shaped steel plates is symmetrically fixed vertically on the ground and a gap is left between the tops of the two L-shaped steel plates. Two two-way multi-section hydraulic cylinders are installed in the working platform and extend from the gap after being raised; the two-way multi-section hydraulic cylinders are placed vertically on the ground and fixed to the ground as a whole through embedded bolts, the tops of the two two-way multi-section hydraulic cylinders are fixed to the bottom of the beam as a whole through bolts, a cover plate is fixed on the top of the beam, a pulley is installed at the bottom of the beam, and a rechargeable chain electric hoist and an operating handle connected by wires are hung at the lower end of the pulley. The operating handle controls the rise or fall of the chain of the rechargeable chain electric hoist. A hydraulic station is installed between the two two-way multi-section hydraulic cylinders under the working platform, and a control valve is provided at the outlet of the hydraulic station and connected to the two-way multi-section hydraulic cylinder through an oil pipe.

[0007] The utility model discloses a hoisting device for a mill liner bolt removal tool. The top and the bottom of the bidirectional multi-section hydraulic cylinder are both circular flange structures.

[0008] The utility model discloses a hoisting device for a mill liner bolt removal tool. The embedded bolts include 6 M16 bolts. The connection between the top of a bidirectional multi-section hydraulic cylinder and a crossbeam is provided with 6 M16 bolts.

[0009] The utility model discloses a hoisting device for a mill liner bolt removal tool. The crossbeam is an HG300mm I-beam, and a lower welding flange of the I-beam is fixed to a top flange of a bidirectional multi-section hydraulic cylinder by bolts.

[0010] The utility model discloses a lifting device for a grinding mill liner bolt removal tool. The pulley adopts an I-beam track pulley, comprises two upper rollers, a lower roller, a bracket and a lifting ring. The bracket is a U-shaped structure. Two upper rollers are symmetrically arranged on the upper side of the bracket, a lower roller is arranged on the lower side of the bracket, a lifting ring is arranged on the bottom of the bracket, 308 bearings are installed in the upper and lower rollers, and the bracket and the lifting ring are made of 12mm thick carbon steel plates and welded.

[0011] The utility model discloses a hoisting device for a mill liner bolt removal tool. The rechargeable electric chain hoist has a specification of 250 kg and a dead weight of 8 kg and is equipped with an operating handle, a rechargeable battery and a charger.

[0012] The utility model discloses a hoisting device for a mill liner bolt removal tool. The L-shaped steel plate of the working platform is welded by 50mm*50mm equilateral angle iron and 5mm thick checkered plate. The cover plate is a 5mm thick checkered plate with a width of 500mm.

[0013] The utility model discloses a hoisting device for a mill liner bolt removal tool. The gap between two L-shaped steel plates of the working platform is equal to the width of the cover plate.

[0014] The utility model discloses a hoisting device for a grinding mill liner bolt removal tool. A guardrail is vertically fixed on one side of a working platform.

[0015] The beneficial effects of the utility model are:

[0016] The utility model discloses a lifting device for a grinding mill liner bolt removal tool. The two-way multi-section hydraulic cylinder and the crossbeam are easy to install. The lifting height of the two-way multi-section hydraulic cylinder can be adjusted arbitrarily. The pulley has low running resistance. The rechargeable chain electric hoist is easy to move and operate. The safe voltage has no risk of electric shock. When in use, it can be lifted to any height in conjunction with heavy-duty pneumatic tools to remove the bolts. After use, the crossbeam can be lowered into the work platform, which is convenient for personnel on duty to walk. The manufacturing cost is low, the processing is simple, the operation is convenient, the space is reasonably used, the labor intensity of maintenance personnel is reduced, and the safety factor when replacing the liner is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a lifting device for a mill liner bolt removal tool.

[0018] Figure 2 The utility model is a side view of a lifting device for a mill liner bolt removal tool.

[0019] Figure 3 The utility model is a structural schematic diagram of a pulley in a hoisting device for a mill liner bolt removal tool.

[0020] The reference numerals in the figure are: 1 is a bidirectional multi-section hydraulic cylinder, 2 is an embedded bolt, 3 is a crossbeam, 4 is a pulley, 5 is a rechargeable electric chain hoist, 6 is an operating handle, 7 is an oil pipe, 8 is a hydraulic station, 9 is a control valve, 10 is a working platform, 11 is a cover plate, and 12 is a guardrail. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method is given, but the protection scope of the present invention is not limited to the following embodiments.

[0022] Example 1: Figure 1-3 As shown, a hoisting device for a mill liner bolt removal tool, the anti-vibration device includes: a bidirectional multi-section hydraulic cylinder, embedded bolts, a hydraulic cylinder top, a crossbeam, a pulley, a rechargeable chain electric hoist, an operating handle, oil pipes A and B, a hydraulic station, a control valve, a working platform, a cover plate, and a guardrail.

[0023] The work platform consists of two L-shaped steel plates, one side of which is symmetrically fixed vertically to the ground, with a gap between the tops of the plates. Two bidirectional multi-section hydraulic cylinders are installed within the work platform, extending from the gap when raised. The cylinders are placed vertically on the ground and fixed to the ground with embedded bolts. Their tops are bolted to the bottom of a crossbeam, a cover plate is fixed to the top of the crossbeam, and a pulley is installed at the bottom of the crossbeam. A cordless electric chain hoist and an operating handle are attached to the pulley's lower end, which controls the chain's rise and fall. A hydraulic station is installed between the two cylinders below the work platform. A control valve is installed at the station's outlet, connected to the cylinders via oil pipes. The control valve controls the oil supply and return to the cylinders, raising and lowering them. After raising and lowering, the cylinders cover the work platform. Guardrails ensure the safety of maintenance personnel working near the edges.

[0024] The utility model discloses a hoisting device for a mill liner bolt removal tool. The top and the bottom of the bidirectional multi-section hydraulic cylinder are both circular flange structures.

[0025] The utility model discloses a hoisting device for a mill liner bolt removal tool. The embedded bolts include 6 M16 bolts. The connection between the top of a bidirectional multi-section hydraulic cylinder and a crossbeam is provided with 6 M16 bolts.

[0026] The utility model discloses a hoisting device for a mill liner bolt removal tool. The crossbeam is an HG300mm I-beam. The lower welding flange of the I-beam is fixed to the top flange of a two-way multi-section hydraulic cylinder by bolts. The length of the I-beam can be determined according to the length of the mill cylinder and the working platform on site.

[0027] The utility model discloses a lifting device for a grinding mill liner bolt removal tool. The pulley adopts an I-beam track pulley, which includes two upper rollers, a lower roller, a bracket and a lifting ring. The bracket is a U-shaped structure. Two upper rollers are symmetrically arranged on the upper side of the bracket, and a lower roller is arranged on the lower side of the bracket. A lifting ring is arranged on the bottom of the bracket. The bottom of the I-beam slides between the upper rollers and the lower roller, and the vertical part of the I-beam slides between the two upper rollers. 308 bearings are installed in the upper and lower rollers. The bracket and the lifting ring are made of 12mm thick carbon steel plates and welded together.

[0028] The utility model discloses a lifting device for a grinding mill liner bolt removal tool. The rechargeable electric chain hoist has a specification of 250 kg and a dead weight of 8 kg. It is equipped with an operating handle, a rechargeable battery and a charger. No complicated wiring is required to power on the hoist. The operating handle controls the operation of the rechargeable electric chain hoist, and the rechargeable battery and charger provide power for the rechargeable electric chain hoist. The utility model has the advantages of simple operation and convenient installation and disassembly.

[0029] The utility model discloses a lifting device for a mill liner bolt removal tool. The L-shaped steel plate of the working platform is welded by 50mm*50mm equilateral angle iron and 5mm thick checkered plate. The cover plate is a 5mm thick checkered plate with a width of 500mm. A walking step is welded on one side and a 1m high guardrail is welded on the outside.

[0030] The utility model discloses a hoisting device for a mill liner bolt removal tool. The gap between two L-shaped steel plates of the working platform is equal to the width of the cover plate.

[0031] The utility model discloses a hoisting device for a grinding mill liner bolt removal tool. A guardrail is vertically fixed on one side of a working platform.

[0032] The specific working process is:

[0033] Pre-buried bolts are installed on the ground under the working platform near the grinder, and two two-way multi-section hydraulic cylinders are fastened together with the embedded bolts. The tops of the two two-way multi-section hydraulic cylinders are fixed to the crossbeam with bolts. The two-way multi-section hydraulic cylinders are connected to the oil pipe, hydraulic station, and control valve. The control valve controls the oil inlet or oil return of the two-way multi-section hydraulic cylinder to make it rise or fall. The lifting height can be determined according to the use requirements of the personnel on the work platform. A pulley is installed on the crossbeam, and a rechargeable chain electric hoist is hung under the pulley. Heavy-duty pneumatic tools are hung under the rechargeable chain electric hoist. When working, a pneumatic wrench or air hammer for removing the liner bolts is hung under the rechargeable chain electric hoist. The operating handle can realize the lifting of heavy-duty pneumatic tools to any height for removing the bolts. The pulley installed on the crossbeam has a rolling bearing with low running resistance, and the pulley can be moved horizontally manually to realize the removal of most liner bolts in a single row. After use, remove the rechargeable electric chain hoist, operate the control valve to make the two multi-section hydraulic cylinders in the oil supply or oil return state, so that the crossbeam and the two-way multi-section hydraulic cylinder are raised or lowered and hidden in the working platform and covered with a cover to ensure space after use and facilitate walking of personnel on duty.

[0034] The above descriptions are merely preferred embodiments of the present invention. These embodiments are all different ways of implementing the overall concept of the present invention. The scope of protection of the present invention is not limited to these embodiments. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A hoisting device for a mill liner bolt removal tool, characterized in that: The hoisting device comprises: a bidirectional multi-section hydraulic cylinder (1), embedded bolts (2), a crossbeam (3), a pulley (4), a rechargeable chain electric hoist (5), an operating handle (6), an oil pipe (7), a hydraulic station (8), a control valve (9), a working platform (10) and a cover plate (11). The working platform (10) is two L-shaped steel plates, one side of the two L-shaped steel plates is symmetrically fixed vertically on the ground and a gap is left between the tops of the two L-shaped steel plates. Two bidirectional multi-section hydraulic cylinders (1) are installed in the working platform (10) and the two bidirectional multi-section hydraulic cylinders (1) extend from the gap after being raised; the bidirectional multi-section hydraulic cylinders (1) are placed vertically on the ground and connected by embedded bolts. (2) is fixed to the ground as a whole, the tops of the two bidirectional multi-section hydraulic cylinders (1) are fixed to the bottom of the crossbeam (3) as a whole by bolts, a cover plate (11) is fixed to the top of the crossbeam (3), a pulley (4) is installed at the bottom of the crossbeam (3), a rechargeable chain electric hoist (5) and an operating handle (6) connected by wires are hung at the lower end of the pulley (4), and the operating handle (6) controls the chain of the rechargeable chain electric hoist (5) to rise or fall, and a hydraulic station (8) is installed between the two bidirectional multi-section hydraulic cylinders (1) under the working platform (10), and a control valve (9) is provided at the outlet of the hydraulic station (8) and is connected to the bidirectional multi-section hydraulic cylinder (1) through an oil pipe (7).

2. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The top and bottom of the bidirectional multi-section hydraulic cylinder (1) are both circular flange structures.

3. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The embedded bolts (2) include 6 M16 bolts, and 6 M16 bolts are provided at the connection between the top of the bidirectional multi-section hydraulic cylinder (1) and the crossbeam (3).

4. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The crossbeam (3) is an HG300mm I-steel, and the lower weld flange of the I-steel is fixed to the top flange of the bidirectional multi-section hydraulic cylinder (1) by bolts.

5. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The pulley (4) adopts an I-beam track pulley, including two upper rollers, a lower roller, a bracket and a lifting ring. The bracket is a U-shaped structure. Two upper rollers are symmetrically arranged on the upper side of the bracket, and a lower roller is arranged on the lower side of the bracket. A lifting ring is arranged at the bottom of the bracket. 308 bearings are installed in the upper and lower rollers. The bracket and the lifting ring are made of 12mm thick carbon steel plates and welded.

6. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The rechargeable electric chain hoist (5) has a specification of 250 kg and a deadweight of 8 kg and is equipped with an operating handle (6), a rechargeable battery and a charger.

7. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The L-shaped steel plate of the working platform (10) is made by welding 50mm*50mm equal-angle iron and 5mm thick patterned plate, and the cover plate (11) is a 5mm thick patterned plate with a width of 500mm.

8. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: The gap between the two L-shaped steel plates of the working platform (10) is equal to the width of the cover plate (11).

9. The hoisting device for mill liner bolt removal tool according to claim 1, characterized in that: A guardrail (12) is vertically fixed on one side of the working platform (10).

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