A safety maintenance and protection device for the inside of a crusher

Abstract

This invention relates to a safety maintenance and protection device for the inside of a crusher. The device includes an inner conical maintenance platform (3), a double-layer ring folding rotating ladder (4), and an L-shaped connecting ladder support plate (5). The inner conical maintenance platform (3) is lifted and fitted onto the top of the moving cone by a crane. After the double-layer ring folding rotating ladder (4) is assembled and unfolded, it is lifted and fitted onto the root of the countersunk pin sleeve (7) of the inner conical maintenance platform (3) with the help of a crane. The L-shaped connecting ladder support plate (5) is welded to the connecting frame (16) by welding. In this scheme, the combination of the inner conical maintenance platform and the double-layer ring folding rotating ladder allows more personnel to participate in maintenance at the same time. The transportation of materials and tools is convenient, the work efficiency is greatly improved, and it can prevent personnel from falling and getting injured while lifting accessories such as ball bearing bushes in the machine cavity maintenance area.

Description

Technical Field

[0001] This invention relates to a protective device, specifically a safety maintenance and protection device for the inside of a crusher, belonging to the fields of mechanical processing technology and mining machinery technology. Background Technology

[0002] The fine crushing process in the gravity separation plant of Meishan Iron and Steel Mining Branch's ore dressing plant currently uses a Metso HP500 crusher. During operation, a high-pressure motor drives a horizontal shaft. A small gear at the end of the horizontal shaft drives a large gear mounted on an eccentric sleeve flange. This large gear drives the eccentric sleeve to rotate at high speed around the main shaft. The moving cone spherical bearing sits on the concave surface of a spherical bearing at the top of the main shaft, while the lower bushing of the moving cone is fitted onto the eccentric sleeve. During the eccentric or gyratory motion of the eccentric sleeve, the moving cone is driven by the contact between the moving cone bushing and the eccentric sleeve. When the moving cone approaches the fixed cone, the ore is being squeezed and crushed, while the other side of the moving cone moves away from the fixed cone. At this point, the crushed ore is discharged from the bottom of both cones by its own weight. The ore to be crushed is fed to the crusher's feed hopper via a feed belt, and then falls evenly after impacting the distribution plate fixed on the moving cone. During operation at the Meishan Gravity Separation Plant, it was found that a series of maintenance operations on the HP500 crusher, such as replacing the moving cone liner, replacing the fixed cone liner, and replacing the frame copper pads, required lifting components such as the adjusting sleeve and moving cone off the crusher. This exposed the spherical bearings and eccentric copper bushings on the crusher's main shaft. This resulted in the spherical bearings, eccentric copper bushings, and related lubrication channels of the crusher, which have high requirements for cleanliness and surface roughness. When collisions or foreign objects occur during operation, the surface roughness of the spherical bearings and eccentric copper bushings decreases, causing abnormal fit between the moving cone and the spherical bearings and eccentric copper bushings. This can lead to abnormal friction and temperature rise during equipment operation, causing the spherical bearings and eccentric copper bushings to burn out. At the same time, there is also a risk that debris and other dirt will enter the lubrication channels of the spherical bearings, leading to blockage of the lubrication system, oil contamination, and a series of malfunctions. This situation makes it difficult to ensure equipment protection during the maintenance of the HP500 crusher. There is always concern that unseen or overlooked issues may cause the aforementioned malfunctions, which often result in prolonged equipment downtime, high maintenance difficulty, advanced technical requirements, and high costs for spare parts. Currently, the common solution is to cover the exposed spherical bearings, eccentric copper bushings, and lubrication channels with rags. However, this poses safety risks for personnel moving up and down the equipment and directly stepping on the spherical bearings. Prolonged work near the counterweights and spherical bearings inevitably leads to oversights, especially when replacing the frame copper pads, which is time-consuming and demanding, making equipment protection during maintenance difficult. After maintenance, the spherical bearings, eccentric copper bushings, and related lubrication channels often need to be cleaned and inspected before reassembly, resulting in low maintenance efficiency and compromised maintenance quality. Furthermore, maintenance personnel standing inside the machine cavity face challenges in tool placement, limited standing space, and restricted movement, constantly worrying about slipping and falling, further reducing efficiency and safety. Therefore, a new method for internal maintenance protection of the crusher is urgently needed. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing a safety maintenance and protection device for the interior of a crusher. The technical solution involves designing a maintenance platform that fits the moving cone and spherical bearing of the crusher, facilitating movement of maintenance personnel within the machine cavity and the placement of tools. A welding point is designed on top of the maintenance platform to facilitate lifting and fitting the platform onto the moving cone.

[0004] To achieve the above objectives, the technical solution of this invention is as follows: a safety maintenance and protection device for an internal crusher, comprising an inner conical maintenance platform, a double-layer ring folding rotating ladder, and an L-shaped connecting ladder support plate. The inner conical maintenance platform is lifted and fitted onto the moving cone by a crane. After the double-layer ring folding rotating ladder is assembled and unfolded, it is lifted and fitted onto the root of the countersunk pin sleeve of the inner conical maintenance platform with the assistance of a crane. The L-shaped connecting ladder support plate is welded to the connecting frame. A maintenance platform is designed to fit the moving cone and spherical bearing of the crusher, facilitating movement of maintenance personnel within the machine cavity and the placement of tools. A welding point is designed above the maintenance platform to facilitate lifting and fitting the platform onto the moving cone. The designed maintenance platform has an internal conical structure that can completely fit onto the moving cone surface, making the platform more stable and robust, able to withstand greater gravity, allowing for multi-person operation and improving maintenance efficiency. Design a rotatable, foldable, and disassembleable ladder to facilitate personnel access to the crusher cavity and the transport of materials and maintenance tools. The designed ladder is divided into three sections, allowing for quick disassembly and assembly, convenient use and storage, and saving space. One end of the ladder has a double-layered ring that fits into the maintenance platform, providing both positioning and rotation. The ladder can be manually moved and rotated to a suitable location according to the maintenance environment and schedule. The inner conical maintenance platform includes a semi-grooved lifting plate, a countersunk pin sleeve, a countersunk conical platform, and a portion of a conical plate. The semi-grooved lifting plate is welded to the upper center of the countersunk pin sleeve; the countersunk pin sleeve is welded to the upper center area of ​​the countersunk conical platform; the portion of the conical plate is welded to the inside of the countersunk conical platform, forming a triangular hollow ring to increase the safety of the maintenance platform, reduce its weight, lower material costs, and grind the welds to prevent scratching the moving conical ball bearing surface, while also increasing the contact area with the moving conical ball bearing surface, ensuring a stable and secure operation.

[0005] The double-ring folding spiral staircase includes a left-side double-ring support staircase, a middle L-shaped connecting staircase, and a right-side escalator.

[0006] The left-side double-ring support ladder includes a double-ring support ladder frame and a long connector. The double-ring, support ladder frame, and long connector are connected from left to right by welding.

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

[0008] The right-side escalator includes a round tube connector, an escalator frame, a C-shaped handrail, and movable escalator legs. The round tube connector, C-shaped handrail, and movable escalator legs are welded to the upper left, upper middle, and lower right ends of the escalator frame, respectively.

[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] One end of the support column is welded to the lower right end of the escalator frame, and the other end is welded to the surface of a sphere. The sphere is inserted into a hemispherical countersunk cone seat, which can rotate freely and automatically align the escalator position upon contact with the ground.

[0011] Compared with the prior art, the present invention has the following advantages: 1) The use of the inner conical surface maintenance platform eliminates the need to cover the exposed spherical tiles, eccentric copper sleeves, and lubrication channels with rags, avoids personnel directly stepping on the spherical tiles when going up and down the equipment, eliminates slip and fall injuries when walking and working on the spherical tile surface, and prevents injuries from physical exhaustion and falling when carrying and lifting the frame copper pads for a long time.

[0012] 2) The inner conical surface maintenance platform facilitates the placement of tools and equipment, eliminating the possibility of accidental damage to the bearing surface from the use and placement of metal tools. It also prevents dust particles and metal shavings from clogging the oil passages on the bearing surface during maintenance.

[0013] 3) The double-layer ring folding rotating ladder can be quickly disassembled and assembled. It can be lifted and dragged by personnel to designated positions to enter and exit the crusher cavity. It also serves as a safe passage for transporting tools and equipment, eliminating the risk of slipping and falling when personnel climb over the exposed shell of the crusher.

[0014] 4) The movable support leg on the right side of the escalator allows for placement of the escalator at different angles, adjusting the position of the escalator contact surface, making it more stable for people to ascend and descend, and preventing falls and injuries.

[0015] 5) The inner conical surface maintenance platform and the double-layer ring folding spiral ladder are easy to install, simple to manufacture, and readily available in materials. They are inexpensive and easy to popularize. After disassembly, they do not take up much space and can be used immediately during maintenance.

[0016] 6) The combination of the inner conical surface maintenance platform and the double-layer ring folding rotating ladder allows more personnel to participate in maintenance at the same time. It facilitates the transportation of materials and tools, greatly improves work efficiency, and can prevent personnel from falling and getting injured while lifting ball bearing bushes and other accessories in the machine cavity maintenance area. Attached Figure Description

[0017] Figure 1: Rendering of safety maintenance and protection measures for crushers

[0018] Figure 2 3D solid model of the inner conical surface maintenance platform

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

[0020] Figure 4 : 3D solid model of the double-ring supported ladder on the left side

[0021] Figure 5 : 3D solid model of the L-shaped connecting ladder in the middle

[0022] Figure 6 : 3D solid model of the escalator on the right

[0023] Figure 7 3D solid drawing of a circular pipe connector

[0024] Figure 8 3D solid model of the movable support leg of the right escalator.

[0025] In the diagram: 1. Exposed shell of the crusher; 2. Internal maintenance area of ​​the crusher; 3. Inner conical maintenance platform; 4. Double-layer ring folding rotating ladder; 5. L-shaped connecting ladder support plate; 6. Semi-grooved lifting plate; 7. Countersunk pin sleeve; 8. Countersunk conical platform; 9. Partial conical plate; 10. Triangular hollow ring; 11. Double-layer ring; 12. Support ladder frame; 13. Long connector; 14. Short connector; 15. 90° partial ring; 16. Connecting frame; 17. Circular pipe connector; 18. Ladder frame; 19. C-shaped handrail; 20. Ladder movable support leg; 21. Cross-slot countersunk screw; 22. Support leg cylinder; 23. Sphere; 24. Hemispherical countersunk conical seat. Detailed Implementation

[0026] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0027] Example 1: As Figure 1 As shown: An internal safety maintenance and protection device for a crusher, the device includes an inner conical maintenance platform 3, a double-layer ring folding rotating ladder 4, and an L-shaped connecting ladder support plate 5. The inner conical maintenance platform 3 is lifted and fitted onto the top of the moving cone by a crane. After the double-layer ring folding rotating ladder (4) is assembled and unfolded, it is lifted and fitted onto the root of the countersunk pin sleeve 7 of the inner conical maintenance platform 3 with the help of a crane. The L-shaped connecting ladder support plate 5 is welded to the connecting frame 16 by welding.

[0028] like Figure 2 , Figure 3As shown: The inner conical surface maintenance platform 3 consists of four parts: a semi-grooved lifting plate 6, a countersunk pin sleeve 7, a countersunk conical platform 8, and a portion of the conical plate 9. The semi-grooved lifting plate 6 is welded to the upper center of the countersunk pin sleeve 7. The countersunk pin sleeve 7 is fixed to the upper center area of ​​the countersunk conical platform 8 by welding. The portion of the conical plate 9 is welded to the inside of the countersunk conical platform 8 at the upper and lower positions, forming a triangular hollow ring 10 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, reducing material costs. The welds are ground to prevent scratching the moving conical ball bearing surface, and also to increase the contact area with the moving conical ball bearing surface, making it firm and stable during use.

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

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

[0031] like Figure 6 The three-dimensional solid diagram of the right escalator is shown: The right escalator is mainly composed of four parts: round tube connector 17, escalator frame 18, C-shaped handrail 19, and escalator movable support leg 20. The round tube connector 17, C-shaped handrail 19, and escalator movable support leg 20 are welded to the upper left, upper middle, and lower right ends of the escalator frame 18 in sequence.

[0032] like Figure 7 The three-dimensional solid diagram of the round tube connector shows that the long connector 13 and the short connector 14 are connected and fastened by the cross-slot countersunk screw 21, and the free rotation stroke between the long connector 13 and the short connector 14 can reach 180°.

[0033] like Figure 8 The three-dimensional solid diagram of the movable support leg of the right escalator is shown: one end of the support column 22 is welded to the lower right end of the escalator frame 18, and the other end is welded to the surface of the sphere 23. The sphere 23 is inserted into the hemispherical countersunk cone seat 24. The cone seat 24 can rotate freely and automatically align the escalator position when in contact with the ground.

[0034] Working principle explanation:

[0035] This invention provides a maintenance and protection method for internal crushing using a combination of an inner conical surface maintenance platform 3 and a double-layer ring folding rotary ladder 4. In use, the inner conical surface maintenance platform 3 is first lifted by a crane and placed above the moving cone; then the double-layer ring folding rotary ladder 4 is assembled and unfolded, and lifted by a crane and placed at the root of the countersunk pin sleeve 7 of the inner conical surface maintenance platform 3.

[0036] Using the inner conical surface maintenance platform 3 eliminates the need to cover exposed spherical bearings, eccentric copper bushings, and lubrication channels with rags. This prevents personnel from directly stepping on the spherical bearings when getting on and off the equipment, eliminating the risk of slipping and falling while walking on the bearing surface. It also prevents injuries from physical exhaustion during long-term replacement of the frame copper pads. Furthermore, it eliminates the possibility of accidentally damaging the bearing surface with metal tools and prevents dust particles and metal shavings from clogging the oil passages on the bearing surface during maintenance.

[0037] The double-layer ring folding spiral ladder 4 can be quickly disassembled and assembled. It can be lifted and dragged by personnel to designated positions inside the crusher cavity, and also serves as a safe passage for transporting tools, eliminating the risk of slipping and falling when climbing over the exposed shell of the crusher. The movable support legs on the right side of the ladder allow for placement of the ladder at different angles, adjusting the position of the ladder's contact surface for a more stable ascent and descent, preventing falls and injuries.

[0038] The inner conical surface maintenance platform 3 and the double-layer ring folding rotating ladder 4 are easy to install, simple to manufacture, and readily available in materials. Their low cost facilitates widespread adoption. After disassembly, they do not occupy much space and can be used immediately during maintenance. The combination of the inner conical surface maintenance platform 3 and the double-layer ring folding rotating ladder 4 allows more personnel to participate in maintenance simultaneously, facilitates the transportation of materials and tools, significantly improves work efficiency, and prevents personnel from slipping and falling while lifting ball bearing bushes and other accessories within the machine cavity maintenance area. This combination provides high safety performance during operation.

[0039] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A safety maintenance and protection device for an internal crusher, characterized in that, The protective device includes an inner conical surface maintenance platform (3), a double-layer ring folding rotating ladder (4), and an L-shaped connecting ladder support plate (5). The inner conical surface maintenance platform (3) is lifted and fitted onto the top of the moving cone by a crane. After the double-layer ring folding rotating ladder (4) is assembled and unfolded, it is lifted and fitted onto the root of the countersunk pin sleeve (7) of the inner conical surface maintenance platform (3) with the help of a crane. The L-shaped connecting ladder support plate (5) is welded to the connecting frame (16) by welding.

2. The internal service safeguard for a crusher as claimed in claim 1, wherein, The inner conical surface maintenance platform (3) includes a half-groove lifting plate (6), a countersunk pin sleeve (7), a countersunk conical surface platform (8), and a portion of a conical plate (9). The half-groove lifting plate (6) is set at the upper center of the countersunk pin sleeve (7) by welding. The countersunk pin sleeve (7) is fixed to the upper center area of ​​the countersunk conical surface platform (8) by welding. The portion of the conical plate (9) is welded to the inside of the countersunk conical surface platform (8) at the upper and lower positions, forming a triangular hollow ring (10) 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), reduces material costs, and grinds the weld.

3. An internal service safeguard for a crusher as claimed in claim 2, characterised in that, The double-ring folding spiral staircase (4) includes a left double-ring support staircase, a middle L-shaped connecting staircase and a right escalator; The left-side double-ring support ladder includes a double-ring (11) support ladder frame (12) and a long connector (13). The double-ring (11), support ladder frame (12), and long connector (13) are connected from left to right by welding. The middle L-shaped connecting ladder includes a short connector (14), a 90° partial ring (15), and a connecting frame (16). The short connector (14), the 90° partial ring (15), and the connecting frame (16) are connected together by welding from left to right. The right-side escalator includes a round tube connector (17), an escalator frame (18), a C-shaped handrail (19), and a movable escalator leg (20). The round tube connector (17), the C-shaped handrail (19), and the movable escalator leg (20) are welded to the upper left, upper middle, and lower right ends of the escalator frame (18) in sequence.

4. The internal service safeguard for a crusher as claimed in claim 3, wherein, The long connector (13) and the short connector (14) are connected and fastened by a cross-slot countersunk screw (21), and the free rotation stroke between the long connector (13) and the short connector (14) can reach 180°.

5. The internal service safeguard for a crusher as claimed in claim 3, wherein, One end of the support column (22) is welded to the lower right end of the escalator frame (18), and the other end is welded to the surface of the sphere (23). The sphere (23) is inserted into the hemispherical countersunk cone seat (24). The cone seat (24) can rotate freely and automatically align the escalator position when in contact with the ground.

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