Crusher internal safety maintenance protection device

Abstract

The invention relates to an internal safety maintenance protection device for a crusher. The protection device comprises an inner conical surface maintenance platform (3), a double-layer ring folding rotating ladder (4) and an L-shaped connecting ladder supporting flat plate (5), and the inner conical surface maintenance platform (3) is hoisted by a travelling crane and is arranged above a movable cone in a sleeving manner; after being assembled and unfolded, the double-layer ring folding rotating ladder (4) is hoisted and sleeved into the root of a counter bore pin shaft sleeve (7) of the inner conical surface maintenance platform (3) under the hoisting cooperation of a travelling crane; the L-shaped connecting ladder supporting flat plate (5) is welded on the connecting body frame (16) in a welding manner; in the scheme, the inner conical surface maintenance platform and the double-layer ring folding rotating ladder are combined for use, so that more people can enter the maintenance platform to participate in maintenance at the same time, materials and tools are convenient to transport, the operation efficiency is greatly improved, and people can be prevented from stepping and falling injury when carrying accessories such as ball tile bushings in a machine cavity maintenance area.

Description

Technical Field

[0001] The present invention relates to a protection device, in particular to a safety maintenance protection device inside a crusher, belonging to the technical fields of mechanical processing and mining machinery. Background Technique

[0002] The crusher currently used in the fine crushing process of the gravity separation plant of Meishan Iron and Steel Mining Company is the Metso HP500 crusher. When the crusher is working, the high-pressure motor drives the horizontal shaft to rotate. The pinion at the end of the horizontal shaft drives the large gear installed on the flange of the eccentric bushing, and the large gear drives the eccentric bushing to rotate at high speed around the main shaft. The spherical bearing of the moving cone sits on the concave surface of the spherical tile at the top of the main shaft, and the lower bushing of the moving cone is sleeved on the eccentric bushing. During the eccentric or gyratory motion of the eccentric bushing, the moving cone is driven by means of the contact between the moving cone bushing and the eccentric bushing. When the moving cone approaches the fixed cone, the ore is in the process of being squeezed and broken, and the other side of the moving cone moves away from the fixed cone. At this time, the crushed ore is discharged from the bottom of the two cones by its own weight. The ore to be crushed is fed to the crusher feed hopper through the feed belt, and the ore hits the distribution plate fixed on the moving cone and then falls evenly. During the use process in the gravity separation plant of Meishan, it is found that for a series of maintenance operations such as replacing the moving cone liner, replacing the fixed cone liner, and replacing the copper gasket of the frame of the HP500 crusher, components such as the adjusting sleeve and the moving cone need to be lifted off the crusher, so as to expose the spherical tile and the eccentric copper bushing of the main shaft part of the crusher, resulting in the exposure of the spherical tile, the eccentric copper bushing and the related lubricating oil channels of the crusher with relatively high requirements for cleanliness and roughness. When there is rubbing or foreign objects during the operation process, the roughness of the surfaces of the spherical tile and the eccentric copper bushing is reduced, resulting in abnormal fit between the moving cone and the spherical tile and the eccentric copper bushing, which will cause abnormal friction and temperature rise when the equipment is working, and cause the spherical tile, the eccentric copper bushing, etc. to burn out; at the same time, there is also a risk that debris and other dirt will enter the lubricating oil channel of the spherical tile, which will further cause blockage of the lubrication system and oil pollution, resulting in a series of failures. This situation makes it difficult to guarantee the equipment protection during the maintenance of the HP500 crusher. There is always a worry that the above-mentioned failures will be caused by invisible and unnoticed situations, and these failures often result in long-term shutdown of the equipment, with great maintenance difficulty, high maintenance technical requirements, and high maintenance spare parts cost. The current common solution is to cover the exposed spherical tile, eccentric copper bushing and lubricating oil channels with rags, but it is difficult to guarantee safety when personnel get on and off the equipment and directly step on the spherical tile. It is inevitable to be negligent during long-term operation near the counterweight and the spherical tile. Especially when replacing the copper gasket of the frame, the time is long and the task is heavy, and it is difficult to guarantee the equipment maintenance protection. After the maintenance operation is completed, it is often necessary to clean and inspect the spherical tile, eccentric copper bushing and related lubricating oil channels before proceeding to the next assembly, resulting in low maintenance efficiency and difficult to guarantee the equipment maintenance quality. Moreover, the maintenance personnel carry out maintenance operations inside the machine cavity. It is difficult to place the tools and equipment, the standing position of the personnel is limited, and the activity range is restricted. There is always a worry about stepping on the air, resulting in low maintenance efficiency and difficult to guarantee safety. Therefore, there is an urgent need for a method for internal maintenance protection of the crusher. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a safety maintenance protection device inside a crusher. The technical solution designs a maintenance platform that fits the moving cone and the spherical bushing of the crusher, facilitating the maintenance personnel to walk and place tools inside the machine cavity. A lifting point is welded above the designed maintenance platform to facilitate the lifting and sleeving of the maintenance platform onto the moving cone.

[0004] To achieve the above object, the technical solution of the present invention is as follows. A safety maintenance protection device inside a crusher, the protection device includes an inner conical surface maintenance platform, a double-layer ring folding and rotating ladder, and an L-shaped connecting ladder support flat plate. The inner conical surface maintenance platform is sleeved above the moving cone by hoisting with a crane; after the double-layer ring folding and rotating ladder is assembled and unfolded, it is hoisted and sleeved into the root of the counterbore pin sleeve of the inner conical surface maintenance platform with the cooperation of the crane lifting; the L-shaped connecting ladder support flat plate is welded to the connecting body frame by welding. A maintenance platform that fits the moving cone and the spherical bushing of the crusher is designed to facilitate the maintenance personnel to walk and place tools inside the machine cavity. A lifting point is welded above the designed maintenance platform to facilitate the lifting and sleeving of the maintenance platform onto the moving cone. The designed maintenance platform has a conical surface structure inside, which can completely adhere to the conical surface of the moving cone, making the maintenance platform more stable and firm, capable of withstanding greater gravity pressure, enabling multiple people to work, and improving the maintenance efficiency. A rotatable, foldable and detachable ladder is designed to facilitate personnel to enter and exit the crusher machine cavity and transport material maintenance tools. The designed walking ladder is divided into three sections, which can be quickly disassembled and assembled, facilitating use and storage, and saving space in the area. One end of the designed ladder has a double-layer ring that can be sleeved into the maintenance platform, playing a role in limiting and rotating, and can be dragged by manpower to rotate and place the ladder to a suitable position according to the maintenance site environment and progress. Among them, the inner conical surface maintenance platform includes a semi-slot hole lifting plate, a counterbore pin sleeve, a counterbore conical surface platform and a partial conical plate. The semi-slot hole lifting plate is welded to the center position at the upper end of the counterbore pin sleeve by welding; the counterbore pin sleeve is fixed to the central area above the counterbore conical surface platform by welding; the partial conical plate is welded at the upper and lower positions inside the counterbore conical surface platform, and a triangular hollow ring is formed between the two to increase the safety of the maintenance platform. At the same time, it also reduces the weight of the inner conical surface maintenance platform and the material cost, and grinds the weld to prevent scratching the spherical bushing surface of the moving cone, and also increases the contact area with the spherical bushing surface of the moving cone, making it firm and stable during use.

[0005] Among them, the double-layer ring folding and rotating ladder includes a left double-layer ring support ladder, a middle L-shaped connecting ladder and a right escalator;

[0006] Among them, the left double-layer ring support ladder includes a double-layer ring support ladder frame and a long connecting piece. The double-layer ring, the support ladder frame and the long connecting piece are sequentially connected by welding from left to right;

[0007] The middle L-shaped connecting ladder includes a short connecting piece, a 90° partial circular ring and a connecting body frame. The short connecting piece, the 90° partial circular ring and the connecting body frame are connected together in sequence from left to right by welding.

[0008] The right escalator includes a round tube connector, an escalator frame, a C-shaped handrail and an escalator movable leg. The round tube connector, C-shaped handrail and escalator movable leg are welded in sequence at the upper left end, upper middle end and lower right end of the escalator frame.

[0009] The long connector and the short connector are connected and fastened by cross-slot countersunk screws, and the free rotation stroke between the long connector and the short connector can reach 180°.

[0010] Among them, one end of the support leg cylinder is welded to the lower end of the right end of the escalator frame, and the other end is welded to the surface of the sphere. The sphere is embedded in the hemispherical countersunk cone seat. The cone seat can rotate easily and freely, and automatically align the escalator position when it touches the ground.

[0011] Compared with the existing technology, the present invention has the following advantages: 1) The use of the inner cone surface maintenance platform eliminates the need to cover the exposed spherical tiles, eccentric copper sleeves and lubricating oil channels with rags, thus preventing personnel from stepping directly on the spherical tiles when getting on and off the equipment, eliminating the risk of slipping and falling when walking on the spherical tile surface, and preventing injuries caused by exhaustion during the long-term replacement of the rack copper pads.

[0012] 2) The inner conical surface maintenance platform is convenient for placing tools, eliminating the situation where metal tools accidentally damage the ball tile surface when used. It can also prevent dust particles and metal chips from clogging the ball tile surface oil channel during maintenance work.

[0013] 3) The double-layer folding rotating ladder can be quickly disassembled and assembled. It can be carried and dragged to the designated position in the upper and lower crusher cavity by personnel. It is also a safe passage for transporting tools, eliminating the risk of people climbing over the exposed shell of the crusher and slipping.

[0014] 4) The movable legs on the right side of the escalator can be placed at different positions and angles, and the position of the escalator contact surface can be adjusted to make people go up and down more smoothly, preventing people from falling and getting injured.

[0015] 5) The inner cone maintenance platform and double-layer ring folding rotary ladder are easy to install, simple to make and easy to obtain materials, low cost and easy to popularize. After disassembly, they do not take up too much space and can be used at any time during maintenance work.

[0016] 6) The combination of the inner cone maintenance platform and the double-ring folding rotary ladder allows more people to participate in the maintenance at the same time, making it convenient to transport materials and tools, greatly improving work efficiency, and preventing people from stepping on air and falling while lifting accessories such as ball bushings in the machine cavity maintenance area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1: Effect diagram of safety maintenance protection measures for crusher

[0018] Figure 2 : Three-dimensional solid diagram of the inner conical surface maintenance platform

[0019] Figure 3 : Sectional view of the inner conical surface maintenance platform

[0020] Figure 4 : Three-dimensional solid diagram of the double-layer ring support ladder on the left side

[0021] Figure 5 : Three-dimensional solid diagram of the middle L-shaped connecting ladder

[0022] Figure 6 : Three-dimensional solid diagram of the right escalator

[0023] Figure 7 : Three-dimensional solid diagram of the round pipe connector

[0024] Figure 8 : Three-dimensional solid diagram of the movable support leg of the right escalator.

[0025] In the figure: 1. Exposed housing of the crusher, 2. Inner maintenance area of the crusher, 3. Inner conical surface maintenance platform, 4. Double-layer ring folding and rotating ladder, 5. Support flat plate of the L-shaped connecting ladder, 6. Semi-groove hole lifting plate, 7. Counterbore pin bushing, 8. Counterbore conical surface platform, 9. Part of the conical plate, 10. Triangular hollow ring, 11. Double-layer ring, 12. Support ladder frame, 13. Long connecting piece, 14. Short connecting piece, 15. 90° part of the ring, 16. Connecting body frame, 17. Round pipe connector, 18. Escalator frame, 19. C-shaped handrail, 20. Movable support leg of the escalator, 21. Cross recessed head screw, 22. Leg cylinder, 23. Sphere, 24. Hemispherical counterbore conical seat. Specific implementation mode

[0026] In order to deepen the understanding of the present invention, the following will make a detailed description of this embodiment in conjunction with the accompanying drawings.

[0027] Embodiment 1: As Figure 1 shown: A safety maintenance protection device inside a crusher, the protection device includes an inner conical surface maintenance platform 3, a double-layer ring folding and rotating ladder 4, and an L-shaped connecting ladder support flat plate 5. The inner conical surface maintenance platform 3 is hoisted by a crane and sleeved above the moving cone; after the double-layer ring folding and rotating ladder (4) is assembled and unfolded, it is hoisted and sleeved at the root of the counterbore pin bushing 7 of the inner conical surface maintenance platform 3 with the cooperation of crane lifting; the L-shaped connecting ladder support flat plate 5 is welded to the connecting body frame 16 by welding.

[0028] As Figure 2 、 Figure 3As shown in the figure: The inner conical surface maintenance platform 3 is composed of four parts: a semi-slot hole lifting plate 6, a counterbore pin bushing 7, a counterbore conical surface platform 8, and a partial conical plate 9. The semi-slot hole lifting plate 6 is welded to the center position at the upper end of the counterbore pin bushing 7 by welding; the counterbore pin bushing 7 is fixed to the central area above the counterbore conical surface platform 8 by welding; the partial conical plate 9 is welded at the upper and lower positions inside the counterbore conical surface platform 8, and a triangular hollow ring 10 is formed between the two to increase the safety of the maintenance platform. At the same time, it also reduces the weight of the inner conical surface maintenance platform 3 and the material cost, and the welds are ground to prevent scratching the moving cone spherical tile surface, and at the same time, it also increases the contact area with the moving cone spherical tile surface, making it firm and stable during use.

[0029] As Figure 4 As shown in the three-dimensional solid diagram of the left double-layer ring support ladder: The left double-layer ring support ladder is mainly composed of three parts: a double-layer circular ring 11, a support ladder frame 12, and a long connecting piece 13. The double-layer circular ring 11, the support ladder frame 12, and the long connecting piece 13 are sequentially connected by welding from left to right.

[0030] As Figure 5 As shown in the three-dimensional solid diagram of the middle L-shaped connecting ladder: The middle L-shaped connecting ladder is mainly composed of three parts: a short connecting piece 14, a 90° partial circular ring 15, and a connecting body frame 16. The short connecting piece 14, the 90° partial circular ring 15, and the connecting body frame 16 are sequentially connected together by welding from left to right.

[0031] As Figure 6 As shown in the three-dimensional solid diagram of the right escalator: The right escalator is mainly composed of four parts: a round tube connecting piece 17, an escalator frame 18, a C-shaped handrail 19, and an escalator movable leg 20. The round tube connecting piece 17, the C-shaped handrail 19, and the escalator movable leg 20 are sequentially welded at three positions: the upper left end, the upper middle end, and the lower right end of the escalator frame 18.

[0032] As Figure 7 As shown in the three-dimensional solid diagram of the round tube connecting piece: The long connecting piece 13 and the short connecting piece 14 are connected and fastened by a cross-slot countersunk head screw 21, and the free rotation stroke between the long connecting piece 13 and the short connecting piece 14 can reach 180°.

[0033] As Figure 8 As shown in the three-dimensional solid diagram of the right escalator movable leg: One end of the leg cylinder 22 is welded to the lower right end of the escalator frame 18, and the other end is welded to the surface of the spherical ball 23. The spherical ball 23 is embedded in the hemispherical counterbore cone seat 24, and the cone seat 24 can rotate freely and easily, and the escalator position is automatically aligned when contacting the ground.

[0034] Description of the working principle:

[0035] The present invention provides a maintenance and protection method for the internal maintenance of a crusher by combining an inner cone maintenance platform 3 and a double-ring folding rotary ladder 4. When in use, the inner cone maintenance platform 3 is first inserted above the moving cone through a crane hoist; then the double-ring folding rotary ladder 4 is assembled and unfolded, and hoisted and inserted into the root of the countersunk pin shaft sleeve 7 of the inner cone maintenance platform 3 with the cooperation of the crane.

[0036] The inner cone inspection platform 3 eliminates the need to cover exposed spherical tiles, eccentric copper sleeves, and lubricating oil channels with rags. This prevents personnel from stepping directly on the tiles when getting on and off the equipment, eliminates slipping and falling injuries while walking on the tiles, and prevents injuries from physical exhaustion and being hit during extended periods of replacing rack copper pads. It also eliminates accidental damage to the tiles by metal tools and tools, and prevents dust particles and metal shavings from clogging the oil channel openings on the tiles during maintenance work.

[0037] The double-layer, foldable, rotating ladder 4 can be quickly disassembled and assembled. It can be lifted and dragged to the designated location inside the crusher chamber. It also serves as a safe passage for tools, eliminating the risk of slips and falls from climbing over the exposed crusher casing. The right-hand side of the ladder's movable legs allow the ladder to be positioned at different angles and adjust the contact surface, ensuring smoother ascent and descent, preventing falls.

[0038] The inner cone inspection platform 3 and the double-ring folding rotary ladder 4 are easy to install, simple to manufacture, and readily available. They are also low-cost and readily available. Once disassembled, they occupy minimal space and can be readily accessed during maintenance operations. The combined use of the inner cone inspection platform 3 and the double-ring folding rotary ladder 4 allows for more people to access the platform simultaneously, facilitating the transport of materials and tools, significantly improving operational efficiency, and preventing injuries while lifting accessories such as ball bearings and bushings within the engine cavity inspection area. This combination offers high safety performance for protective operations.

[0039] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions fall within the scope of protection of the claims of the present invention.

Claims

1. An internal safety maintenance protection device for a crusher, characterized in that, The protection device includes an inner conical surface maintenance platform (3), a double-layer ring folding rotary ladder (4), and an L-shaped connecting ladder support flat plate (5). The inner conical surface maintenance platform (3) is hoisted by a crane and sleeved above the moving cone; after the double-layer ring folding rotary ladder (4) is assembled and unfolded, it is hoisted by a crane in cooperation with the lifting and sleeved into the root of the sunken hole pin sleeve (7) of the inner conical surface maintenance platform (3); the L-shaped connecting ladder support flat plate (5) is welded to the connecting body frame (16) by welding.

2. The internal safety maintenance protection device of the crusher according to claim 1, characterized in that, The inner conical surface maintenance platform (3) includes a semi-slot hole lifting plate (6), a sunken hole pin sleeve (7), a sunken hole conical surface platform (8), and a partial conical plate (9). The semi-slot hole lifting plate (6) is arranged at the center position of the upper end of the sunken hole pin sleeve (7) by welding; the sunken hole pin sleeve (7) is fixed at the central area above the sunken hole conical surface platform (8) by welding; the partial conical plate (9) is welded at the upper and lower positions inside the sunken hole conical surface platform (8), and a triangular hollow ring (10) is formed between the two to increase the safety of the maintenance platform. At the same time, the weight of the inner conical surface maintenance platform (3) is reduced, the material cost is reduced, and the welds are ground.

3. The internal safety maintenance protection device of the crusher according to claim 2, characterized in that, The double-layer ring folding rotary ladder (4) includes a left double-layer ring support ladder, a middle L-shaped connecting ladder, and a right escalator. Among them, the left double-layer ring support ladder includes a double-layer ring (11), a support ladder frame (12), and a long connecting piece (13). The double-layer ring (11), the support ladder frame (12), and the long connecting piece (13) are sequentially connected by welding from left to right. The middle L-shaped connecting ladder includes a short connecting piece (14), a 90° partial ring (15), and a connecting body frame (16). The short connecting piece (14), the 90° partial ring (15), and the connecting body frame (16) are sequentially connected together by welding from left to right. The right escalator includes a round pipe connecting piece (17), an escalator frame (18), a C-shaped handrail (19), and an escalator movable leg (20). The round pipe connecting piece (17), the C-shaped handrail (19), and the escalator movable leg (20) are sequentially welded at three positions of the upper left end, the upper middle end, and the lower right end of the escalator frame (18).

4. The internal safety maintenance protection device of the crusher according to claim 3, characterized in that, The long connecting piece (13) and the short connecting piece (14) are connected and fastened by a cross-slot countersunk head screw (21), and the free rotation stroke between the long connecting piece (13) and the short connecting piece (14) can reach 180°.

5. The internal safety maintenance protection device of the crusher according to claim 3, characterized in that, One end of the leg cylinder (22) is welded to the lower end of the right end of the escalator frame (18), and the other end is welded to the surface of the ball (23). The ball (23) is embedded in the hemispherical sunken hole conical seat (24), and the conical seat (24) can rotate freely and easily, and automatically aligns the position of the escalator when it touches the ground.

Images