An auxiliary lifting platform for mill liner bolt punching

Abstract

An auxiliary lifting platform for mill lining bolt punch includes a base, a lifting cylinder, a lifting platform, a hydraulic hanger and a hydraulic station and control unit; the hydraulic station and control unit provide power for the lifting cylinder, the lifting cylinder can drive the lifting platform to rise or fall, the hydraulic hanger rises and falls with the lifting platform, and an operator stands on the lifting platform and holds a bolt impactor to disassemble the lining bolt of the mill; the design is a lifting device specially designed for quickly, safely removing and installing the lining bolt of the mill, when the lining bolt of the mill is disassembled and assembled using the auxiliary lifting platform, the number of mill micro movements can be reduced, and the maintenance operation efficiency can be greatly improved; the safety of the workers can also be ensured through the solid, stable and flexible lifting platform.

Description

Technical Field

[0001] This invention belongs to the field of mill auxiliary machinery, and mainly relates to an auxiliary lifting platform for mill liner replacement bolt punching. Background Technology

[0002] With the advancement of intelligent mining, mining companies are continuously increasing their equipment demands to meet the needs of green, safe, and efficient mines, leading to higher requirements for mill-related equipment. Mill liner replacement is a high-intensity operation with harsh environmental conditions and stringent safety requirements, necessitating a shift from labor-intensive to mechanized applications. Users are demanding comprehensive mechanization of mill liner replacement to improve labor efficiency and operational safety while reducing labor intensity.

[0003] The replacement of mill liners begins with the removal of the old liners. Currently, the most efficient method for removing old liners is to impact the bolts to separate the liners from the cylinder. The widely used bolt removal method involves using a bolt hammer. Under current mill liner replacement conditions, after removing 3-4 rows of liners, new liners are installed. After replacement, the mill is driven slowly, and the previous steps of removing old liners and installing new liners are repeated. Due to the large structural dimensions of large mills, the liners are also quite large. Personnel need to frequently drive the mill slowly to reach the bolt impact points during liner removal, increasing replacement time and safety risks. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the present invention provides an auxiliary lifting platform for punching bolts for changing liners in mills.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows:

[0006] An auxiliary lifting platform for punching bolts for changing mill liner plates, comprising:

[0007] A base is fixed on a concrete foundation, and the base is provided with a vertical track.

[0008] The lifting cylinder is fixed to the bottom surface of the base.

[0009] A lifting platform, one end of which has a lifting track wheel assembly, the lifting track wheel assembly being fixed to the lifting cylinder, the lifting track wheel assembly having rollers, the rollers being able to slide in the track of the base;

[0010] A hydraulic hanger is installed on the lifting platform, one end of which is telescopic and a bolt impactor is suspended at that end;

[0011] The hydraulic station and control unit are connected to the hydraulic components of the lifting cylinder and hydraulic hanger via hydraulic pipelines;

[0012] The hydraulic station and control unit provide power to the lifting cylinder, which can drive the lifting platform to rise or fall. The hydraulic hanger rises and falls with the lifting platform. The operator stands on the lifting platform and uses a bolt impactor to disassemble the liner bolts of the mill.

[0013] The lifting platform has a linear guide rail assembly on the bottom surface of the end closest to the mill, and an auxiliary telescopic platform that can slide on the linear guide rail assembly.

[0014] The base is provided with an auxiliary platform sliding assembly, which includes a pull rod and an arc-shaped track. One end of the pull rod is provided with a first connector, which is fixed to the auxiliary telescopic platform by a bolt assembly. The other end of the pull rod is provided with a roller assembly, which can slide within the arc-shaped track. The arc-shaped track is fixedly connected to the base through a second connector.

[0015] The base is provided with a slide rail assembly connector, which is fixedly connected to the second connector on the arc-shaped track by a bolt assembly.

[0016] The lifting platform is equipped with a fence and a hanger support rod. The fence has a gate, and the hanger support rod is used to support the hydraulic hanger.

[0017] The hydraulic gantry includes a telescopic boom. The telescopic end of the telescopic boom is equipped with a hook pulley device and a telescopic cylinder, and the other end is equipped with a hydraulic winch and a counterweight. The middle part of the hydraulic gantry is fixedly connected to the gantry support rod through a column. The telescopic cylinder and the hydraulic winch are connected to the hydraulic station and control unit through hydraulic pipelines. The wire rope on the hydraulic winch is connected to the hook pulley device.

[0018] The foundation includes a base plate fixed to a concrete foundation, with two parallel column rails on the base plate. The rollers of the lifting track wheel assembly are located in the column rails. The base plate also has a cylinder mounting seat for mounting the lifting cylinder.

[0019] Due to the adoption of the technical solution described above, the present invention has the following advantages:

[0020] This invention provides an auxiliary lifting platform for replacing mill liner bolts. This lifting device is specifically designed for the rapid and safe removal and installation of mill liner bolts. Using the auxiliary lifting platform to disassemble and install mill liner bolts reduces the number of mill micro-movements, significantly improving maintenance efficiency. Furthermore, the robust, stable, and flexible lifting platform ensures worker safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the lifting platform of the present invention;

[0023] Figure 3 This is a schematic diagram of the hydraulic hanger of the present invention;

[0024] Figure 4 This is a schematic diagram of the platform slide rail assembly of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the base of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Combined with appendix Figure 1 The auxiliary lifting platform for replacing mill liner bolts includes a base 3, a lifting cylinder 6, a lifting platform 8, a hydraulic hanger 2, and a hydraulic station and control unit 4.

[0028] The foundation 3 is fixed on a concrete foundation and has a vertical track. The lifting cylinder 6 is fixed to the bottom surface of the foundation 3. One end of the lifting platform 8 has a lifting track wheel assembly 804, which is fixed to the lifting cylinder 6. The lifting track wheel assembly 804 has rollers that can slide in the track of the foundation 3. The hydraulic hanger 2 is installed on the lifting platform 8. One end of the hydraulic hanger 2 is telescopic and is suspended by a bolt impactor 1. The hydraulic station and control unit 4 is connected to the hydraulic components of the lifting cylinder 6 and the hydraulic hanger 2 through hydraulic pipelines. The hydraulic components are the telescopic cylinder 202 and the hydraulic winch 201 described below.

[0029] The hydraulic station and control unit 4 provides power to the lifting cylinder 6. The lifting cylinder 6, with the inflow or outflow of hydraulic oil, drives the lifting platform 8 to rise or fall. The hydraulic hanger 2 is mounted on the lifting platform and rises and falls with the lifting platform 8. Operators stand on the lifting platform 8 and use a bolt impactor 1 to disassemble the mill liner bolts. When using the auxiliary lifting platform to disassemble and install mill liner bolts, especially for large mills, the lifting platform 8 can be used to move from the lower side of the mill to the upper side, increasing the disassembly range, reducing the number of mill micro-movements, and significantly improving maintenance efficiency. However, because the mill is cylindrical, the distance between the platform and the mill cylinder first decreases and then increases as the platform moves upwards. When using the bolt impactor 1 to disassemble the bolts, the operator needs to adjust the distance between the bolt impactor 1 and the cylinder. This requires the hydraulic hanger 2 to be extendable to accommodate the changes in the distance between the bolt impactor 1 and the cylinder.

[0030] As described above, due to the cylindrical shape of the cylinder, during the upward lifting of the lifting platform 8 from the side of the cylinder, the distance between the end of the lifting platform 8 and the cylinder first decreases and then increases. The distance is smallest when the lifting platform 8 reaches the center of the cylinder, and largest when the lifting platform 8 is at the bottom or top. For operator safety, this distance needs to be minimized as much as possible. This also facilitates closer tightening of bolts by workers during the later installation of the liner plates. Figure 2 As shown, the bottom surface of the lifting platform 8 near the mill is provided with a linear guide rail assembly 805, and an auxiliary telescopic platform 806 that can slide is provided on the linear guide rail assembly 805. Figure 1 As shown, the base 3 is equipped with an auxiliary platform sliding component 7, such as... Figure 4 As shown, the auxiliary platform sliding assembly 7 includes a pull rod 701 and an arc-shaped track 702. One end of the pull rod 701 is provided with a first connector 705, which is fixed to the auxiliary telescopic platform 806 by a bolt assembly. The other end of the pull rod 701 is provided with a roller assembly 703, which can slide within the arc-shaped track 702. The arc-shaped track 702 is fixedly connected to the base 3 by a second connector 704. Due to the presence of the arc-shaped track 702, the length of the pull rod 701 is fixed. Thus, during the lifting process of the lifting platform 8, the roller self-check 703 can slide within the arc-shaped track 702. The arc-shaped track 702 has a certain curvature, which can be set according to the curvature of the mill. Thus, during the lifting process of the lifting platform 8, the pull rod 701 pulls the auxiliary telescopic platform 806 to slide within the linear guide rail assembly 805, which can compensate for the change in distance between the lifting platform and the cylinder surface as the height changes. It provides a safer working environment for staff, and thanks to the curved track 702, the process does not require manual intervention.

[0031] Furthermore, such as Figure 4 and 5 As shown, the base 3 is provided with a slide rail assembly connector 302, and the slide rail assembly connector 302 is fixedly connected to the second connector 704 on the arc track 702 by a bolt assembly.

[0032] Preferred, such as Figure 2 As shown, the lifting platform 8 is equipped with a railing 801 and a hanger support rod 803. The railing 801 has a railing door 802. The hanger support rod 803 is used to support the hydraulic hanger 2. The railing 801 encloses three sides of the lifting platform, with one side exposed facing the mill cylinder. This makes the lifting platform safer and avoids the risk of operators falling from a height. The railing door 802 is set on the railing 801 to facilitate operators to enter the platform.

[0033] Preferred, such as Figure 3 As shown, the hydraulic lifting frame 2 includes a telescopic arm 204. The telescopic end of the telescopic arm 204 is equipped with a hook pulley device 206 and a telescopic cylinder 205, and the other end is equipped with a hydraulic winch 201 and a counterweight 202. The middle part of the hydraulic lifting frame 2 is fixedly connected to the lifting frame support rod 803 through a support column 203. A bolt impactor 1 is suspended on the hook pulley device 206. The telescopic cylinder 205 and the hydraulic winch 201 are hydraulic components connected to the hydraulic station and control unit 4 through hydraulic pipelines. The wire rope on the hydraulic winch 201 is connected to the hook pulley device 206. By adjusting the winding and unwinding of the wire rope on the hydraulic winch 201, the height of the hook pulley device 206 can be adjusted, thereby adjusting the position of the bolt impactor 1, so that the workers can remove the corresponding bolts. At the same time, the telescopic arm 204 can be driven to extend and retract by the telescopic cylinder 205, thereby adapting to the distance between the bolt impactor 1 and the surface of the cylinder when the platform is at different heights.

[0034] Preferred, such as Figure 2 and 5 As shown, the foundation base 3 includes a base plate 304 fixed on a concrete foundation. Two parallel column rails 301 are provided on the base plate 304. The rollers of the lifting track wheel assembly 804 are located in the column rails 301. The base plate is also provided with a cylinder mounting seat 303 for mounting the lifting cylinder 6. The lifting cylinder 6 is connected to the hydraulic station and control unit 4 through hydraulic pipelines. As the extension rod of the lifting cylinder 6 extends, the lifting platform 8 slowly rises.

[0035] This design is a lifting device specifically designed for the quick and safe removal and installation of mill liner bolts. Using the auxiliary lifting platform to remove and install mill liner bolts reduces the number of mill micro-movements, significantly improving maintenance efficiency; the robust, stable, and flexible lifting platform also ensures worker safety.

[0036] The parts not detailed above are existing technologies and therefore have not been described in detail.

Claims

1. An auxiliary lifting platform for punching bolts for changing liners in a mill, characterized in that: include A base is fixed on a concrete foundation, and the base is provided with a vertical track. The lifting cylinder is fixed to the bottom surface of the base. The lifting platform has a lifting track wheel assembly at one end, which is fixed to the lifting cylinder. The lifting track wheel assembly has rollers that can slide in the track of the base. The bottom surface of the lifting platform near the mill is provided with a linear guide rail assembly, and an auxiliary telescopic platform that can slide is provided on the linear guide rail assembly. The base is equipped with an auxiliary platform sliding assembly, which includes a tie rod and an arc-shaped track. One end of the tie rod is provided with a first connector, which is fixed to the auxiliary telescopic platform by a bolt assembly. The other end of the tie rod is provided with a roller assembly, which can slide within the arc-shaped track. The arc-shaped track is fixedly connected to the base via a second connector. The curvature of the arc-shaped track matches the curvature of the mill cylinder. During the lifting process, the tie rod slides along the arc track and automatically pulls the auxiliary telescopic platform to extend and retract, so as to compensate for the change in distance between the lifting platform and the surface of the mill cylinder. A hydraulic hanger is installed on the lifting platform, one end of which is telescopic and a bolt impactor is suspended at that end; The hydraulic station and control unit are connected to the hydraulic components of the lifting cylinder and hydraulic hanger via hydraulic pipelines; The hydraulic station and control unit provide power to the lifting cylinder, which can drive the lifting platform to rise or fall. The hydraulic hanger rises and falls with the lifting platform. The operator stands on the lifting platform and uses a bolt impactor to disassemble the liner bolts of the mill.

2. The auxiliary lifting platform for changing mill liner bolts according to claim 1, characterized in that: The base is provided with a slide rail assembly connector, which is fixedly connected to the second connector on the arc-shaped track by a bolt assembly.

3. The auxiliary lifting platform for changing mill liner bolts according to claim 1, characterized in that: The lifting platform is equipped with a fence and a hanger support rod. The fence has a gate, and the hanger support rod is used to support the hydraulic hanger.

4. The auxiliary lifting platform for changing mill liner bolts according to claim 1, characterized in that: The hydraulic gantry includes a telescopic boom. The telescopic end of the telescopic boom is equipped with a hook pulley device and a telescopic cylinder, and the other end is equipped with a hydraulic winch and a counterweight. The middle part of the hydraulic gantry is fixedly connected to the gantry support rod through a column. The telescopic cylinder and the hydraulic winch are connected to the hydraulic station and control unit through hydraulic pipelines. The wire rope on the hydraulic winch is connected to the hook pulley device.

5. An auxiliary lifting platform for punching bolts for changing mill liner plates according to claim 1, characterized in that: The foundation includes a base plate fixed to a concrete foundation, with two parallel column rails on the base plate. The rollers of the lifting track wheel assembly are located in the column rails. The base plate also has a cylinder mounting seat for mounting the lifting cylinder.

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