A bin electric unblocking device and a bin unblocking method

Abstract

The application belongs to the field of ore bin unblocking, and particularly relates to an ore bin electric unblocking device and an ore bin unblocking method. The device comprises a door-shaped frame body, which can be selectively suspended in the ore bin; a cleaning roller, which comprises an electric roller and a tooth assembly installed on the surface of the electric roller, and the main shaft of the electric roller is installed on the door-shaped frame body; and a control end, which is electrically connected with the electric roller and located outside the ore bin. The suspended cleaning roller is hoisted to the corresponding position in the ore bin, the gravity of the door-shaped frame body is utilized, the cleaning roller is adjusted leftward and rightward and upward and downward, the arch position in the ore bin is cleaned, and the irregularly shaped tooth body I and the irregularly shaped tooth body II are used for rotary cutting. The left-rotating irregularly shaped tooth body and the right-rotating irregularly shaped tooth body are symmetrically distributed according to the regulation, the rotary excavation of the completely solidified material is realized, and the dynamic balance problem of the equipment rotation is solved.

Description

Technical Field

[0001] This invention belongs to the field of mine bin unblocking, specifically an electric mine bin unblocking device and a mine bin unblocking method. Background Technology

[0002] In mineral processing, ore needs to be crushed and ground, and then valuable minerals and gangue are separated using specific methods to obtain the desired concentrate. Generally, crushing and grinding operations are separate in a concentrator; crushing typically operates for 15-18 hours a day, while grinding operates for 24 hours. This operational difference necessitates the use of a powder silo to store the crushed products, ensuring a continuous supply of ore to the grinding operation even when crushing is shut down. The crushing process typically produces products with particle sizes of 0-15mm, 0-10mm, or even finer. These products enter the powder silo. However, due to mining or crushing and screening processes, some water is introduced into the crushed products. When these fine particles encounter moisture, they clump together, gradually adhering to the side walls or bottom of the powder silo, eventually leading to arching. Arching can cause the following problems:

[0003] 1) Reducing the usable volume of the ore bin results in less ore storage, affecting subsequent grinding and beneficiation operations;

[0004] 2) Some of the arched material has broken off and blocked the feed inlet of the ore bin, affecting production.

[0005] Therefore, concentrators typically need to clean their ore bins every six months to a year to ensure effective bin volume and smooth subsequent grinding and beneficiation operations. The cleaning methods are as follows:

[0006] 1. The method of suspending personnel and using small excavators for clearing is inefficient, time-consuming, and labor-intensive, as it requires personnel to go down into the mine, which carries the risk of falling and being buried by collapsing materials.

[0007] 2. Using an air cannon requires installing high-pressure air pipes on the outer wall of the ore bin and high-pressure nozzles inside. It also necessitates a large high-pressure air storage tank and compressor, with high-pressure air used regularly each day to impact the material and prevent it from sticking to the bin walls. However, this method involves a large amount of equipment, high modification costs, and high air consumption, resulting in high operating costs. Summary of the Invention

[0008] The technical problem to be solved by this invention is:

[0009] How to clean the arched areas on the walls of a mine bin in a simple and effective way.

[0010] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0011] An electric unblocking device for mine bins, comprising:

[0012] The portal frame 10 can be selectively suspended inside the mine bin;

[0013] Cleaning roller 20 includes electric roller 21 and toothed assembly 22 mounted on the surface of electric roller 21. The main shaft of electric roller 21 is mounted on gantry frame 10.

[0014] Control terminal 30 is electrically connected to electric drum 21 and is located outside the ore bin.

[0015] In a further technical solution, the electric roller 21 is a permanent magnet electric roller 21;

[0016] The tooth assembly 22 includes a left-handed irregular tooth 221 and a right-handed irregular tooth 222. The left-handed irregular tooth 221 and the right-handed irregular tooth 222 are distributed at equal intervals along the electric roller 21, and the left-handed irregular tooth 221 and the right-handed irregular tooth 222 located on the same radial direction are symmetrically distributed.

[0017] In a further technical solution, both the left-hand rotating irregular-shaped excavator 221 and the right-hand rotating irregular-shaped excavator 222 include a mounting plate 221 and an excavator tooth plate 222 mounted on the mounting plate 221. The mounting plate 221 is provided with a connecting hole, and the surface of the electric drum 21 is provided with an internal thread hole corresponding to the position of the connecting hole. The end of the excavator tooth plate 222 away from the mounting plate 221 is gradually deflected along the axis parallel to the electric drum 21. The end of the excavator tooth plate 222 of the left-hand rotating irregular-shaped excavator 221 and the right-hand rotating irregular-shaped excavator 222 away from the mounting plate 221 is deflected to one side in the axial direction, and the deflection directions of the two are opposite.

[0018] A further technical solution is provided on the portal frame 10, with a lifting hole 11. A steel wire rope 111 and three thin steel sheets 112 wrapped around the outside of the steel wire rope 111 are inserted into the lifting hole 11. A flexible magnetic strip 113 is provided on the side of the thin steel sheet 112 opposite to the steel wire rope 111. The top of the lifting hole 11 is a flared structure, and a clamping block 115 is installed inside the flared opening to clamp the side of the thin steel sheet 112 that is away from the steel wire rope 111. The opposite sides of the two thin steel sheets 112 abut against each other, and the side that is in contact with each other is provided with a matching concave and convex part.

[0019] An electric hoist 40 is installed on the side of the wire rope 111 away from the gantry frame 10, and an electric drum 50 is installed on the other end of the thin steel sheet 112. The electric drum 50 starts and stops at the same time as the electric hoist 40.

[0020] A mobile platform 60 is installed on the top of the ore bin, and an electric drum 50 is installed on the mobile platform 60.

[0021] In a further technical solution, the mobile platform 60 includes a transverse ground rail 61 installed on the top of the mine bin and a longitudinal slide rail 62 spanning the transverse ground rail 61. A moving component is installed at the bottom of the longitudinal slide rail 62, and the moving component moves linearly along the transverse ground rail 61. An installation platform 63 is installed on the longitudinal slide rail 62, and an electric drum 50 is installed on the installation platform 63.

[0022] The bottom of the mounting platform 63 is equipped with an extrusion assembly, which presses in concave and convex parts to fit together.

[0023] In a further technical solution, the cross-section of the thin steel sheet 112 is a semi-ring structure of equal thickness;

[0024] The protrusion includes multiple petal structures 1121, and each petal structure 1121 is provided with an ear hook structure, which penetrates the recess to form a snap-fit ​​structure.

[0025] In a further technical solution, the extrusion assembly includes a rotating shaft 114, on which a rolling element 1141 located in the middle and a pressing body 1142 and an unlocking body 1143 distributed on both sides of the rolling element 1141 are mounted. The pressing body 1142 and the unlocking body 1143 are symmetrically distributed on both sides of the rolling element 1141. The unlocking body 1143 is used to release the ear hook structure and the latching state of the recess.

[0026] In a further technical solution, the clamping block 115 includes a horizontal plate 1151 and a vertical block 1152 arranged in an L-shape. The horizontal plate 1151 is provided with mounting holes and is fixed to the gantry frame 10 by bolts. The bottom of the vertical block 1152 is a guide surface adapted to the flared structure.

[0027] A method for clearing blockages in a mine bin, using the aforementioned device, comprises the following steps:

[0028] 1) Install a transverse ground rail and a longitudinal slide rail 62 spanning the transverse ground rail 61 on the top of the mine bin, and install moving components at both ends of the bottom of the longitudinal slide rail 62. The moving components move in a straight line along the transverse ground rail 61, and install a sliding installation platform 63 on the longitudinal slide rail 62.

[0029] 2) Install an electric drum 50 and an electric hoist 40 on the installation platform 63. The wire rope 111 on the electric hoist 40 passes through the lifting hole 11 on the portal frame 10. The end of the thin steel sheet 112 on the electric drum 50 is fixed in the lifting hole 11 by the clamping block 115 and wrapped around the outside of the wire rope 111. The side of the thin steel sheet 112 abuts against the wire rope 111. An extrusion assembly is installed on the installation platform 63. The circumferential surface of the rolling body 1141 abuts against the side of the thin steel sheet 112 facing away from the wire rope 111. An electric roller 21 is installed at the bottom of the portal frame 10.

[0030] 3) The electric drum 50 and the electric hoist 40 are opened at the same time, and the wire rope 111 and the thin steel sheet 112 are lowered synchronously. During the lowering process, the rolling body 1141 will always abut against the side of the thin steel sheet facing away from the wire rope 111. At the same time, the pressing body 1142 will pass through the recess of the petal structure 1142 to form a snap-fit ​​structure with the adjacent thin steel sheet 112. Meanwhile, the flexible magnetic strip 113 will adhere the thin steel sheet 112 to the surface of the wire rope 112 until it is lowered to the required position.

[0031] 4) The position of the installation platform 63 on the longitudinal slide rail 62, the position of the longitudinal slide rail 62 on the transverse ground rail 61, and the winding and unwinding of the electric drum 50 and the electric hoist 40 are coordinated to complete the cutting of the arched area in the ore bin by the electric drum 21.

[0032] When the wire rope 111 and the thin steel sheet 112 are retrieved, the unlocking body 1143 will act to bring the ear hook structure closer together, so that the three thin steel sheets 112 will move away from each other immediately after the unlocking body 1143 is unlocked, thus completing the automatic opening of the ear hook structure.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The suspended cleaning roller is hoisted to the corresponding position inside the mine bin. Using the gravity of the gantry frame, the cleaning roller is adjusted left and right and up and down to clean the arched position inside the mine bin. The roller is then subjected to rotary cutting by the irregularly shaped scraper body 1 and irregularly shaped scraper body 2 distributed in a circumferential direction.

[0035] Second, by using left-hand and right-hand rotary shaped excavators symmetrically distributed according to regulations, the rotary excavator can thoroughly remove caking materials and solve the dynamic balance problem of the equipment rotation.

[0036] 3. The gantry frame adopts a suspension method, with multiple thin steel plates of arc structure set on the steel wire rope. These plates are wrapped around the outside of the steel wire rope by an extrusion assembly. The plates are pressed together during lowering and unlocked during retraction by a pressing and unlocking body, ensuring stable rotary cutting. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0039] Figure 3 This is a top view of the structure inside the lifting hole;

[0040] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0041] Figure 5This is a top view of the internal structure of the stepped opening;

[0042] Figure 6 for Figure 5 A magnified view of a section at point C;

[0043] Figure 7 Connection relationship between the electric roller and the tooth assembly Figure 1 ;

[0044] Figure 8 Connection relationship between the electric roller and the tooth assembly Figure 1 ;

[0045] Figure 9 Diagram of a left-handed, irregularly shaped excavator structure;

[0046] Figure 10 This is a diagram of a right-handed, irregularly shaped excavator. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Example 1, such as Figure 1 As shown, an electric unblocking device for a mine bin includes:

[0050] The portal frame 10 can be selectively suspended inside the mine bin;

[0051] Cleaning roller 20 includes electric roller 21 and toothed assembly 22 mounted on the surface of electric roller 21. The main shaft of electric roller 21 is mounted on gantry frame 10.

[0052] Control terminal 30 is electrically connected to electric drum 21 and is located outside the ore bin.

[0053] like Figures 7 to 10 As shown, the electric roller 21 is a permanent magnet electric roller 21, which is a commercially available roller.

[0054] The toothed assembly 22 includes a left-handed irregular-shaped toothed body 221 and a right-handed irregular-shaped toothed body 222. The left-handed and right-handed irregular-shaped toothed bodies 221 and 222 are evenly spaced and staggered along the electric roller 21, and are symmetrically distributed in the same radial direction. This staggered and symmetrical distribution effectively solves the problems of thorough cleaning and dynamic balancing.

[0055] Both the left-hand rotating irregular-shaped cutter 221 and the right-hand rotating irregular-shaped cutter 222 include a mounting plate 221 and a cutting tooth plate 222 mounted on the mounting plate 221. The mounting plate 221 has connecting holes, and the surface of the electric drum 21 has internal threaded holes corresponding to the positions of the connecting holes. The end of the cutting tooth plate 222 away from the mounting plate 221 gradually deflects along the axis parallel to the electric drum 21. The ends of the cutting tooth plates 222 of both the left-hand rotating irregular-shaped cutter 221 and the right-hand rotating irregular-shaped cutter 222 deflect axially to one side, and their deflection directions are opposite. Research has shown that the forces exerted by the cutting tooth plates 212 of the left-hand rotating irregular-shaped cutter 221 and the right-hand rotating irregular-shaped cutter 222 are opposite, ensuring a constant force balance during rotary cutting of the arched area and preventing movement.

[0056] Example 2, in an electric unblocking device for a mine bin, such as Figure 1 , Figure 2 , Figure 3 As shown, the portal frame 10 is provided with a lifting hole 11. A steel wire rope 111 and three thin steel plates 112 that are circumferentially wrapped around the outside of the steel wire rope 111 are inserted into the lifting hole 11. A flexible magnetic strip 113 is provided on the side of the thin steel plate 112 opposite to the steel wire rope 111. The thin steel plate 112 is attracted to the steel wire rope 111 by the flexible magnetic strip 113. The cross-section of the thin steel plate 112 is a semi-ring structure of equal thickness. The top of the lifting hole 11 is a flared structure, and a clamping block 115 is installed in the flared opening to clamp the side of the thin steel plate 112 that is away from the steel wire rope 111. The opposite sides of the two thin steel plates 112 abut against each other, and the side that is in contact with each other is provided with a matching concave and convex part. The matching installation on the abutting side can make the three thin steel plates 112 surround the outside of the steel wire rope 111, ensuring the stability of the steel wire rope 111.

[0057] An electric hoist 40 is installed at the end of the wire rope 111 away from the gantry frame 10, and an electric drum 50 is installed at the other end of the thin steel sheet 112. The electric drum 50 starts and stops simultaneously with the electric hoist 40. By controlling the thin steel sheet 112 and the wire rope 111 to be wound and unwound synchronously through the electric hoist 40 and the electric drum 50, the height of the cleaning drum 20 can be adjusted.

[0058] A mobile platform 60 is installed on the top of the mine bin, and an electric drum 50 is installed on the mobile platform 60. The mobile platform 60 includes a transverse ground rail 61 installed on the top of the mine bin and a longitudinal slide rail 62 spanning the transverse ground rail 61. A moving component is installed at the bottom of the longitudinal slide rail 62, and the moving component moves linearly along the transverse ground rail 61. An installation platform 63 is installed on the longitudinal slide rail 62, and the electric drum 50 is installed on the installation platform 63. The horizontal and vertical positions of the cleaning drum 20 and the installation platform 63 are adjusted by the mobile platform 60, thereby realizing the cleaning operation of the inner wall of the mine bin.

[0059] like Figure 5 As shown, the installation platform 63 is provided with stepped holes that are larger at the top and smaller at the bottom, for the wire rope 111 and thin steel sheet 112 to pass through. A pressing component is installed in the large end at the top. The pressing component presses in the concave and convex parts to fit together. The convex part includes multiple petal structures 1121. The petal structures 1121 are provided with ear hook structures. The ear hook structures pass through the concave part to form a buckle structure, thereby realizing that the three thin steel sheets 112 surround the inside of the wire rope 111 and the sides abut against each other to form a whole.

[0060] like Figure 5 As shown, the extrusion assembly includes a rotating shaft 114, on which a rolling element 1141 located in the center and pressing bodies 1142 and unlocking bodies 1143 distributed on both sides of the rolling element 1141 are mounted. The pressing bodies 1142 and unlocking bodies 1143 are symmetrically distributed on both sides of the rolling element 1141, as shown. Figure 6 As shown, the unlocking body 1143 has an unlocking groove on its circumference, which corresponds to the position of the flap structure 1121. When the unlocking groove is adapted to the flap structure 1121, it can bring the ear hook structures closer together so that the distance is smaller than the recess (through hole). With the help of the electric drum 50, the thin steel sheet 112 is pulled from the top to immediately release the latching state between the ear hook structure and the recess. When the thin steel sheet 112 is lowered, the friction force drives the rolling body 1141 and the rotating shaft 114 to rotate simultaneously. The pressing body 1142 acts on the side with the flap structure 1121 to penetrate the recess and form a latching structure. When the thin steel sheet 112 is retrieved, the unlocking body 1143 squeezes the flap structures of the flap structure 1121 together. With the help of the electric drum 50, the three thin steel sheets 112 can be moved away from each other immediately after the unlocking body 1143 is unlocked, thereby realizing the automatic opening of the flap structure.

[0061] like Figure 2 As shown, the clamping block 115 includes an L-shaped horizontal plate 1151 and a vertical block 1152. The horizontal plate 1151 has mounting holes and is fixed to the portal frame 10 by bolts. The bottom of the vertical block 1152 is a guide surface adapted to the flared structure. By fixing the horizontal plate 1151 to the portal frame 10 with bolts, the vertical block 1152 radially clamps the thin steel sheet 112.

[0062] A method for clearing blockages in a mine bin, using the aforementioned device, comprises the following steps:

[0063] 1) Install a transverse ground rail and a longitudinal slide rail 62 spanning the transverse ground rail 61 on the top of the mine bin, and install moving components at both ends of the bottom of the longitudinal slide rail 62. The moving components move in a straight line along the transverse ground rail 61, and install a sliding installation platform 63 on the longitudinal slide rail 62.

[0064] 2) Install an electric drum 50 and an electric hoist 40 on the installation platform 63. The wire rope 111 on the electric hoist 40 passes through the lifting hole 11 on the portal frame 10. The end of the thin steel sheet 112 on the electric drum 50 is fixed in the lifting hole 11 by the clamping block 115 and wrapped around the outside of the wire rope 111. The side of the thin steel sheet 112 abuts against the wire rope 111. An extrusion assembly is installed on the installation platform 63. The circumferential surface of the rolling body 1141 abuts against the side of the thin steel sheet 112 facing away from the wire rope 111. An electric roller 21 is installed at the bottom of the portal frame 10.

[0065] 3) The electric drum 50 and the electric hoist 40 are opened at the same time, and the wire rope 111 and the thin steel sheet 112 are lowered synchronously. During the lowering process, the rolling body 1141 will always abut against the side of the thin steel sheet facing away from the wire rope 111. At the same time, the pressing body 1142 will pass through the recess of the petal structure 1142 to form a snap-fit ​​structure with the adjacent thin steel sheet 112. Meanwhile, the flexible magnetic strip 113 will adhere the thin steel sheet 112 to the surface of the wire rope 112 until it is lowered to the required position.

[0066] 4) The position of the installation platform 63 on the longitudinal slide rail 62, the position of the longitudinal slide rail 62 on the transverse ground rail 61, and the winding and unwinding of the electric drum 50 and the electric hoist 40 are coordinated to complete the cutting of the arched area in the ore bin by the electric drum 21.

[0067] When the wire rope 111 and the thin steel sheet 112 are retrieved, the unlocking body 1143 will act to bring the ear hook structure closer together, so that the three thin steel sheets 112 will move away from each other immediately after the unlocking body 1143 is unlocked, thus completing the automatic opening of the ear hook structure.

[0068] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. An electric unblocking device for a mine bin, characterized in that, include: A portal frame (10) is available for selective suspension within the mine bin; Cleaning roller (20) includes electric roller (21) and toothed assembly (22) mounted on the surface of electric roller (21). The main shaft of electric roller (21) is mounted on gantry frame (10). The control terminal (30) is electrically connected to the electric drum (21) and is located outside the ore bin; The portal frame (10) is provided with a lifting hole (11). A steel wire rope (111) and three thin steel sheets (112) wrapped around the outside of the steel wire rope (111) are inserted into the lifting hole (11). A flexible magnetic strip (113) is provided on the side of the thin steel sheet (112) opposite to the steel wire rope (111). The top of the lifting hole (11) is a flared structure, and a pressing block (115) is installed in the flared mouth to press the side of the thin steel sheet (112) away from the steel wire rope (111). The opposite sides of the two thin steel sheets (112) abut against each other, and the side that is in contact with each other is provided with a matching concave and convex part. An electric hoist (40) is installed on the side of the wire rope (111) away from the gantry frame (10), and an electric drum (50) is installed on the other end of the thin steel sheet (112). The electric drum (50) starts and stops at the same time as the electric hoist (40). A mobile platform (60) is installed on the top of the mine bin, and an electric drum (50) is installed on the mobile platform (60).

2. The electric unblocking device for a mine bin according to claim 1, characterized in that, The electric drum (21) is a permanent magnet electric drum; The tooth assembly (22) includes a left-handed irregular toothed body (221) and a right-handed irregular toothed body (222). The left-handed irregular toothed body (221) and the right-handed irregular toothed body (222) are distributed at equal intervals along the electric drum (21), and the left-handed irregular toothed body (221) and the right-handed irregular toothed body (222) located on the same radial direction are symmetrically distributed.

3. The electric unblocking device for a mine bin according to claim 2, characterized in that, Both the left-hand spiral irregular-shaped excavator (221) and the right-hand spiral irregular-shaped excavator (222) include a mounting plate (2211) and an excavator tooth plate (2212) mounted on the mounting plate (2211). The mounting plate (2211) is provided with a connecting hole, and the surface of the electric drum (21) is provided with an internal thread hole corresponding to the position of the connecting hole. The end of the excavator tooth plate (2212) away from the mounting plate (2211) is gradually deflected along the axis parallel to the electric drum (21). The end of the excavator tooth plate (2212) of the left-hand spiral irregular-shaped excavator (221) and the right-hand spiral irregular-shaped excavator (222) away from the mounting plate (2211) is deflected to one side along the axial direction, and the deflection directions of the two are opposite.

4. The electric unblocking device for a mine bin according to claim 3, characterized in that, The mobile platform (60) includes a transverse ground rail (61) installed on the top of the mine bin and a longitudinal slide rail (62) spanning the transverse ground rail (61). A moving component is installed at the bottom of the longitudinal slide rail (62), and the moving component moves linearly along the transverse ground rail (61). An installation platform (63) is installed on the longitudinal slide rail (62), and an electric drum (50) is installed on the installation platform (63). The bottom of the mounting platform (63) is equipped with an extrusion assembly, which presses in the concave and convex parts to fit together.

5. The electric unblocking device for a mine bin according to claim 4, characterized in that, The cross-section of the thin steel sheet (112) is a semi-ring structure of equal thickness; The protrusion includes multiple petal structures (1121), and an ear hook structure is provided on the petal structure (1121). The ear hook structure passes through the recess to form a snap-fit ​​structure.

6. The electric unblocking device for a mine bin according to claim 5, characterized in that, The extrusion assembly includes a rotating shaft (114), on which a rolling element (1141) located in the middle is mounted, and a pressing body (1142) and an unlocking body (1143) distributed on both sides of the rolling element (1141). The pressing body (1142) and the unlocking body (1143) are symmetrically distributed on both sides of the rolling element (1141). The unlocking body (1143) is used to release the ear hook structure and the snap-fit ​​state of the recess.

7. The electric unblocking device for a mine bin according to claim 6, characterized in that, The clamping block (115) includes a horizontal plate (1151) and a vertical block (1152) arranged in an L-shape. The horizontal plate (1151) is provided with mounting holes and is fixed to the gantry frame (10) by bolts. The bottom of the vertical block (1152) is a guide surface adapted to the flared structure.

8. A method for clearing blockages in a mine bin, characterized in that, Using the apparatus as described in claim 7, the steps are as follows: 1) Install a transverse ground rail and a longitudinal slide rail (62) spanning the transverse ground rail (61) on the top of the mine bin, and install moving components at both ends of the bottom of the longitudinal slide rail (62). The moving components move in a straight line along the transverse ground rail (61), and install a sliding installation platform (63) on the longitudinal slide rail (62). 2) Install an electric drum (50) and an electric hoist (40) on the installation platform (63). The wire rope (111) on the electric hoist (40) passes through the lifting hole (11) on the portal frame (10). The end of the thin steel sheet (112) on the electric drum (50) is fixed in the lifting hole (11) by the clamping block (115) and wrapped around the outside of the wire rope (111). The side of the thin steel sheet (112) abuts against the wall. An extrusion assembly is installed on the installation platform (63). The circumferential surface of the rolling body (1141) abuts against the side of the thin steel sheet (112) facing away from the wire rope (111). An electric roller (21) is installed at the bottom of the portal frame (10). 3) The electric drum (50) and the electric hoist (40) are opened at the same time, and the wire rope (111) and the thin steel sheet (112) are lowered synchronously. During the lowering process, the rolling body (1141) will always be in contact with the side of the thin steel sheet facing away from the wire rope (111). At the same time, the pressing body (1142) will pass through the recess of the petal structure (1121) and form a snap-fit ​​structure with the adjacent thin steel sheet (112). Meanwhile, the flexible magnetic strip (113) will stick the thin steel sheet (112) to the surface of the wire rope (111) until it is lowered to the required position. 4) The position of the installation platform (63) on the longitudinal slide rail (62), the position of the longitudinal slide rail (62) on the transverse ground rail (61), and the winding and unwinding of the electric drum (50) and electric hoist (40) are coordinated to complete the arching area of ​​the ore bin by the electric drum (21). When the wire rope (111) and thin steel sheet (112) are recovered, the unlocking body (1143) will act to bring the ear hook structure closer together, so that the three thin steel sheets (112) will move away from each other immediately after the unlocking body (1143) is unlocked, thus completing the automatic opening of the ear hook structure.

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