Shaft protection device of mine hoist

Abstract

The invention relates to the technical field of mine hoisting protection, in particular to a mine hoist shaft protection device which comprises a hoisting cage, locking assemblies are fixedly connected to the hoisting cage in a rectangular array mode, sliding guide rails corresponding to the locking assemblies are arranged on the side face of the hoisting cage, and the sliding guide rails are arranged on the periphery of the hoisting cage in a rectangular array mode. The locking assembly comprises a sliding roller, the sliding roller is provided with a limiting concave wheel making contact with the sliding guide rail, a rotating shaft rod is fixedly connected into the limiting concave wheel, mounting bearings are symmetrically arranged at the two ends of the rotating shaft rod, and the two ends of the rotating shaft rod are movably connected with supporting side plates through the mounting bearings. One side of the limiting concave wheel is movably connected with a friction locker through a mounting bearing, and one end, far away from the limiting concave wheel, of the friction locker is provided with a locking trigger locker; after the side face of the friction locker 6 loses blocking, the friction locker 6 swings to the position between the sliding guide rail 3 and the sliding idler wheel 5 through the self weight of the friction locker 6, and braking is conducted through friction force.

Description

Technical Field

[0001] The present invention relates to the technical field of mine hoist protection, and particularly relates to a mine hoist shaft protection device. Background Art

[0002] A mine hoist is a crucial large-scale hoisting mechanical equipment in mine production. It mainly consists of a drum around which a steel wire rope is wound. The other end of the steel wire rope is connected to a hoisting cage in the shaft. By driving a transmission device with an electric motor, the drum rotates, thereby winding or releasing the steel wire rope to achieve the lifting and lowering movement of the hoisting cage in the shaft.

[0003] For example, in a single-rope winding hoist, the electric motor drives the hoisting drum to rotate through a speed reducer (or directly). One end of the steel wire rope is fixed on the drum, and after being wound around the drum, the other end is suspended from a headframe sheave to hang the hoisting container. As the drum rotates, the container is lifted and lowered. In a friction hoist, the hoisting rope is hung on a friction wheel, and the container is lifted by the friction force with the friction wheel liner. Both ends of the hoisting rope are each connected to a container, or one end is connected to the container and the other end is connected to a balance weight. During operation, the friction force between the friction liner of the main sheave and the steel wire rope drives the steel wire rope to complete the lifting and lowering of the container.

[0004] Generally, the end of the steel wire rope passes through the ear plate at the top of the hoisting cage and then bends back, and then the steel wire rope is locked with a steel wire rope buckle. The contact position between the steel wire rope and the ear plate on the hoisting cage not only bears the downward load but also the vibration generated when the hoisting cage ascends, resulting in friction at the contact position between the steel wire rope and the ear plate. The contact position of the steel wire rope is subject to long-term frictional force and will wear. After wear, the load-bearing capacity of the steel wire rope will decrease. At this time, bearing the load before wear will accelerate the wear at the worn part, and ultimately lead to the risk of fracture at the worn part. After the steel wire rope breaks, the hoisting cage will fall downward, causing a safety accident. Summary of the Invention

[0005] Technical Problems to be Solved

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, meet the actual needs, and provide a mine hoist shaft protection device to solve the above technical problems.

[0007] Technical Solution

[0008] To achieve the purpose of the present invention, the technical solution adopted by the present invention is as follows:

[0009] A mine hoist shaft protection device includes a hoisting cage. Locking components are fixedly connected to the hoisting cage in a rectangular array, and sliding guide rails corresponding to the locking components are provided on the side of the hoisting cage. Among them, the sliding guide rails are arranged in a rectangular array around the hoisting cage.

[0010] The locking assembly includes a sliding roller, the sliding roller has a limiting cam in contact with the sliding guide rail, a rotating shaft rod is fixedly connected in the limiting cam, and installation bearings are arranged at both ends of the rotating shaft rod symmetrically. Among them, both ends of the rotating shaft rod are movably connected with support side plates through the installation bearings;

[0011] One side of the limiting cam is movably connected with a friction locking device through an installation bearing, and a trigger locking device for locking is arranged at one end of the friction locking device away from the limiting cam, and the trigger locking device is installed in the hollow bracket.

[0012] As a further technical solution of the present invention, the trigger locking device includes a cross bar attached to the side surface of the friction locking device. A limiting card slot is opened at the rear of the cross bar, and an L-shaped baffle is vertically arranged at the rear of the cross bar. A trapezoidal limiting block corresponding to the limiting card slot is integrally arranged on one side of the L-shaped baffle close to the cross bar, and the bottom of the trapezoidal limiting block is inserted into the limiting card slot.

[0013] As a further technical solution of the present invention, the side surface of the trapezoidal limiting block is attached to one side of the limiting card slot close to the friction locking device. The cross bar horizontally penetrates through the inner side of the hollow bracket, and the L-shaped baffle is vertically arranged on the inner side of the hollow bracket. A trigger lead block is arranged below the L-shaped baffle, and the trigger lead block is slidably connected with the inner side of the hollow bracket.

[0014] As a further technical solution of the present invention, the friction locking device includes a friction braking block. The friction braking block is integrally L-shaped, and the bent part of the friction braking block is arc-shaped corresponding to the sliding roller. A counterweight baffle is fixedly connected to the bottom of the friction braking block, and inclined surfaces are arranged symmetrically at one end of the counterweight baffle away from the cross bar.

[0015] As a further technical solution of the present invention, symmetric inclined extension plates are fixedly connected to one end of the friction braking block away from the counterweight baffle, and the inclined extension plates are respectively arranged on both sides of the limiting cam. Any one of the inclined extension plates is located between the limiting cam and the support side plate. A bearing hole is opened at one end of the inclined extension plate away from the friction braking block, and the outer ring of the installation bearing is in interference fit with the bearing hole.

[0016] As a further technical solution of the present invention, symmetric support columns are arranged at one end of the support side plate away from the friction locking device. The symmetric support columns are located on both sides of the limiting cam, and the bottom of the support column is movably connected with a side locking plate, and the side locking plate is located below the limiting cam.

[0017] As a further technical solution of the present invention, the side locking plate includes a rotating sleeve sleeved outside the support column, and the rotating sleeve is rotationally matched with the support column. Wherein, one end of the rotating sleeve is fixedly connected with an arc-shaped clamping plate, and the other end of the rotating sleeve is fixedly connected with an arc-shaped turning plate.

[0018] As a further technical solution of the present invention, wherein, the arc-shaped clamping plate is arc-shaped towards the side away from the limit cam, and the arc-shaped turning plate is arc-shaped towards the side close to the limit cam, and the end of the arc-shaped turning plate away from the rotating sleeve is correspondingly arranged with the inclined surface of the end of the counterweight baffle.

[0019] As a further technical solution of the present invention, the end of the arc-shaped clamping plate away from the rotating sleeve is fixedly connected with a brake pad, and the brake pads are symmetrically arranged on both sides of the sliding guide rail respectively.

[0020] (3) Beneficial effects:

[0021] A. In the present invention, first, when the connection between the towing rope and the lifting cage is damaged and broken, due to the self-weight of the lifting cage, the lifting cage will quickly fall downward in the shaft. At this time, the trigger lead block inside the hollow support will be in a weightless state, resulting in a collision between the trigger lead block and the upper L-shaped baffle. After the bottom of the L-shaped baffle is collided, it will move upward, thereby driving the trapezoidal limit block arranged on the side to move upward as well, so that the trapezoidal limit block is separated from the limit card slot on the cross bar. Since the cross bar loses the block of the trapezoidal limit block, the downward gravity of the friction lock will push the cross bar to move, so that the cross bar moves to the end limit plate, so that the side of the friction lock loses the block, and then the friction lock moves to between the sliding guide rail and the sliding roller by its own weight for braking. By triggering the protection mechanism automatically in a weightless manner, the response time of the protection structure can be improved, so as to quickly protect the falling lifting cage;

[0022] B. In the present invention, when the cross bar on the side of the friction brake block is retracted to the left, the left side of the friction brake block loses the block. Due to the self-weight of the friction brake block, the friction brake block will be subjected to a downward force. And the end of the friction brake block is rotationally connected with the sliding roller through the inclined extension plate. Therefore, the friction brake block will swing under the guidance of the inclined extension plate, so that the friction brake block swings to between the sliding roller and the sliding guide rail, and the falling speed is slowed down by the friction force between the side of the friction brake block and the sliding guide rail until the lifting cage bends and stops falling, so as to achieve the braking effect;

[0023] C. In the present invention, when the friction brake block rotates, the counterweight baffle at the bottom of the friction brake block moves along with the friction brake block. Since both sides at one end of the counterweight baffle are inclined, when the counterweight baffle moves between the symmetrically arranged side locking plates, the inclined surface will push the arc-shaped turning plate to move outward. Since the rotating sleeve and the support column are rotatably matched, when the arc-shaped turning plate moves outward, it will push the arc-shaped clamping plates on the other side to approach each other. Through the extrusion force, the brake pads at the ends of the arc-shaped clamping plates are closely attached to the side surface of the sliding guide rail, and the brake effect on the lifting cage is achieved through the frictional force at the connection, which cooperates with the friction brake block to improve the braking effect on the lifting cage;

[0024] D. In the present invention, a rotating shaft rod is fixedly connected to the limit cam, and symmetric mounting bearings are provided at both ends of the rotating shaft rod. One group is movably connected to the support side plate, and the other group is movably connected to the end of the inclined extension plate. The limit cam is supported by the support side plate, so that the limit cam can roll along the side surface of the sliding guide rail, increasing the stability of the lifting cage during lifting and reducing the wear of the traction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 In the present invention Figure 1 is a partial enlarged schematic diagram;

[0027] Figure 3 is a three-dimensional structural schematic diagram of the locking assembly in the present invention;

[0028] Figure 4 In the present invention Figure 3 is another perspective view;

[0029] Figure 5 is the front view of the locking assembly in the present invention;

[0030] Figure 6 In the present invention Figure 3 is a partial structural schematic diagram;

[0031] Figure 7 is a three-dimensional structural schematic diagram of the trigger lock in the present invention;

[0032] Figure 8 In the present invention Figure 7 is another perspective view;

[0033] Figure 9 is a three-dimensional structural schematic diagram of the friction lock in the present invention;

[0034] Figure 10 In the present invention Figure 9 is another perspective view;

[0035] Figure 11 Schematic three-dimensional structure diagram of the side locking plate in the present invention;

[0036] Figure 12 In the present invention Figure 11 Another perspective view;

[0037] In the figure: lifting cage - 1, towing rope - 2, sliding guide rail - 3, supporting side plate - 4, sliding roller - 5, limiting concave wheel - 51, rotating shaft rod - 52, mounting bearing - 53, friction lock - 6, friction brake block - 61, counterweight baffle - 62, inclined extension plate - 63, bearing hole - 64, hollow bracket - 7, trigger lock - 8, cross bar - 81, L-shaped baffle - 82, trapezoidal limit block - 83, trigger lead block - 84, limit card slot - 85, side locking plate - 9, rotating sleeve - 91, arc-shaped clamping plate - 92, brake pad - 93, arc-shaped flip plate - 94, support column - 10, end limit plate - 11. Detailed implementation mode

[0038] Please refer to Figures 1-8 , a shaft protection device for a mine hoist, including a lifting cage 1, a locking assembly is fixedly connected to the lifting cage 1 in a rectangular array, and a sliding guide rail 3 corresponding to the locking assembly is arranged on the side of the lifting cage 1, wherein the sliding guide rails 3 are arranged in a rectangular array around the lifting cage 1;

[0039] The locking assembly includes a sliding roller 5, the sliding roller 5 has a limiting concave wheel 51 in contact with the sliding guide rail 3, a rotating shaft rod 52 is fixedly connected in the limiting concave wheel 51, and mounting bearings 53 are symmetrically arranged at both ends of the rotating shaft rod 52, wherein both ends of the rotating shaft rod 52 are movably connected with a supporting side plate 4 through the mounting bearings 53;

[0040] One side of the limiting concave wheel 51 is movably connected with a friction lock 6 through a mounting bearing 53, and a trigger lock 8 for locking is arranged at one end of the friction lock 6 away from the limiting concave wheel 51, and the trigger lock 8 is installed in the hollow bracket 7.

[0041] Furthermore, the trigger lock 8 includes a cross bar 81 attached to the side of the friction lock 6, a limit card slot 85 is opened at the rear of the cross bar 81, and an L-shaped baffle 82 is vertically arranged at the rear of the cross bar 81. A trapezoidal limit block 83 corresponding to the limit card slot 85 is integrally arranged on one side of the L-shaped baffle 82 close to the cross bar 81, and the bottom of the trapezoidal limit block 83 is inserted into the limit card slot 85.

[0042] Specifically, the side surface of the trapezoidal limit block 83 is attached to the side of the limit card slot 85 close to the friction lock 6. The cross bar 81 horizontally penetrates through the inner side of the hollow support 7, and the L-shaped baffle 82 is vertically arranged on the inner side of the hollow support 7. A trigger lead block 84 is arranged below the L-shaped baffle 82, and the trigger lead block 84 is slidably connected to the inner side of the hollow support 7.

[0043] By adopting the above technical solution, when the connection between the towing rope 2 and the lifting cage 1 is damaged and broken, due to the self-weight of the lifting cage 1, the lifting cage 1 will quickly fall downward in the shaft. At this time, the trigger lead block 84 on the inner side of the hollow support 7 will be in a weightless state, resulting in a collision between the trigger lead block 84 and the upper L-shaped baffle 82. After the bottom of the L-shaped baffle 82 is collided, it will move upward, driving the trapezoidal limit block 83 arranged on the side to move upward as well, separating the trapezoidal limit block 83 from the limit card slot 85 on the cross bar 81. Since the cross bar 81 loses the block of the trapezoidal limit block 83, the downward gravity of the friction lock 6 will push the cross bar 81 to move, causing the cross bar 81 to move to the end limit plate 11, so that the side of the friction lock 6 loses the block. Then, due to the self-weight of the friction lock 6, the friction lock 6 moves between the sliding guide rail 3 and the sliding roller 5 for braking. By triggering the protection mechanism in a weightless manner, the response time of the protection structure can be improved, thereby quickly protecting the falling lifting cage.

[0044] In this embodiment, please refer to Figures 9-10 , the friction lock 6 includes a friction brake block 61. The friction brake block 61 is integrally L-shaped, and the bent part of the friction brake block 61 is in an arc shape corresponding to the sliding roller 5. A counterweight baffle 62 is fixedly connected to the bottom of the friction brake block 61, and symmetrical inclined surfaces are arranged at one end of the counterweight baffle 62 away from the cross bar 81.

[0045] Furthermore, symmetrical inclined extension plates 63 are fixedly connected to one end of the friction brake block 61 away from the counterweight baffle 62, and the inclined extension plates 63 are respectively arranged on both sides of the limit concave wheel 51. Any one of the inclined extension plates 63 is located between the limit concave wheel 51 and the support side plate 4. A bearing hole 64 is opened at one end of the inclined extension plate 63 away from the friction brake block 61, and the outer ring of the mounting bearing 53 is in interference fit with the bearing hole 64.

[0046] By adopting the above technical solution, when the cross bar 81 on the side of the friction brake block 61 is retracted to the left, the left side of the friction brake block 61 loses the block. Due to the self-weight of the friction brake block 61, the friction brake block 61 will be subjected to a downward force. And the end of the friction brake block 61 is rotatably connected to the sliding roller 5 through the inclined extension plate 63. Therefore, the friction brake block 61 will swing under the guidance of the inclined extension plate 63, so that the friction brake block 61 swings between the sliding roller 5 and the sliding guide rail 3, and the falling speed is slowed down by the friction force between the side of the friction brake block 61 and the sliding guide rail 3 until the lifting cage 1 stops falling due to bending, thus achieving a braking effect.

[0047] In this embodiment, please refer to Figures 11-12 , a pair of symmetric support columns 10 are provided at one end of the support side plate 4 away from the friction lock 6. The symmetric support columns 10 are located on both sides of the limit cam 51, and the bottom of the support column 10 is movably connected with a side lock plate 9, and the side lock plate 9 is located below the limit cam 51.

[0048] Further, the side lock plate 9 includes a rotating sleeve 91 sleeved outside the support column 10, and the rotating sleeve 91 is rotationally matched with the support column 10. Among them, one end of the rotating sleeve 91 is fixedly connected with an arc-shaped clamping plate 92, and the other end of the rotating sleeve 91 is fixedly connected with an arc-shaped turning plate 94.

[0049] Specifically, the arc-shaped clamping plate 92 is arc-shaped on the side away from the limit cam 51, and the arc-shaped turning plate 94 is arc-shaped on the side close to the limit cam 51, and the end of the arc-shaped turning plate 94 away from the rotating sleeve 91 is correspondingly arranged with the inclined surface at the end of the counterweight baffle 62.

[0050] Further, the end of the arc-shaped clamping plate 92 away from the rotating sleeve 91 is fixedly connected with a brake pad 93, and the brake pads 93 are symmetrically arranged on both sides of the sliding guide rail 3 respectively.

[0051] By adopting the above technical solution, when the friction brake block 61 rotates, the counterweight baffle 62 at the bottom of the friction brake block 61 moves with the friction brake block 61. Since both sides of one end of the counterweight baffle 62 are inclined, when the counterweight baffle 62 moves between the symmetrically arranged side lock plates 9, the inclined surface will push the arc-shaped turning plate 94 to move outward. Since the rotating sleeve 91 and the support column 10 are rotationally matched, when the arc-shaped turning plate 94 moves outward, it will push the arc-shaped clamping plates 92 on the other side to approach each other. The brake pads 93 at the ends of the arc-shaped clamping plates 92 are pressed against the side of the sliding guide rail 3 through the extrusion force, and the friction force at the connection part achieves a braking effect on the lifting cage 1, and cooperates with the friction brake block 61 to improve the braking effect on the lifting cage 1.

[0052] Further, the hollow support 7 has a hollow tube vertically arranged, and the L-shaped baffle 82 and the trigger lead block 84 are respectively slidably connected to the hollow tube, so that the trigger lead block 84 can slide up and down in the hollow tube, and when the trigger lead block 84 moves upward, it collides with the bottom of the L-shaped baffle 82.

[0053] Specifically, a bolt mounting plate is integrally provided at the bottom of the hollow tube, and the bolt mounting plate is fixedly connected to the lifting cage 1 through bolts. The bottom of the support side plate 4 is fixedly connected to the lifting cage 1;

[0054] The bottom of the support column 10 is fixedly connected to the lifting cage 1, and the rotating sleeve 91 is rotationally matched with the support column 10. The rotating sleeve 91 can rotate at the end of the support column 10, but the rotating sleeve 91 cannot slide up and down outside the support column 10.

[0055] Further, the cross bar 81 transversely penetrates the hollow tube. Among them, an end limit plate 11 is fixedly connected to the end of the hollow tube away from the friction brake block 61. The end limit plate 11 is integrally L-shaped and is located at the end of the cross bar 81. When the trapezoidal limit block 83 separates from the inside of the limit card slot 85, the friction brake block 61 will push the cross bar 81 to move to the left, and the end limit plate 11 limits the end of the cross bar 81.

[0056] Further, a positioning groove is provided on the outer side of the limit cam 51, and a positioning protrusion corresponding to the positioning groove is integrally provided on the side of the sliding guide 3 close to the limit cam 51, and the positioning protrusion on the side of the sliding guide 3 is inserted into the positioning groove on the limit cam 51.

[0057] Specifically, during normal use, the towing rope 2 drives the lifting cage 1 to move up and down, and the limit cam 51 rolls on the side of the sliding guide 3 to make the lifting cage 1 move more stably. The positioning groove in the limit cam 51 and the positioning protrusion on the side of the sliding guide 3 cooperate with each other to prevent the lifting cage 1 from shaking back and forth when moving up and down;

[0058] When the connection between the towing rope 2 and the lifting cage 1 is damaged and broken, due to the self-weight of the lifting cage 1, the lifting cage 1 will quickly fall downward in the shaft. At this time, the trigger lead block 84 inside the hollow support 7 will be in a weightless state, resulting in a collision between the trigger lead block 84 and the upper L-shaped baffle 82. After the bottom of the L-shaped baffle 82 is collided, it will move upward, driving the trapezoidal limit block 83 arranged on the side to move upward as well, causing the trapezoidal limit block 83 to separate from the limit card slot 85 on the cross bar 81. Since the cross bar 81 loses the block of the trapezoidal limit block 83, the downward gravity of the friction lock 6 will push the cross bar 81 to move, causing the cross bar 81 to move to the end limit plate 11, so that the side of the friction lock 6 loses the block. And the friction brake block 61 moves through the counterweight of the counterweight baffle 62. Since the friction brake block 61 is movably connected to the mounting bearing 53 on the rotating shaft rod 52 through the inclined extension plate 63, the friction brake block 61 swings with the inclined extension plate 63 as the radius until the friction brake block 61 swings between the sliding roller 5 and the sliding guide rail 3, and the falling speed is slowed down by the friction between the side of the friction brake block 61 and the sliding guide rail 3 until the lifting cage 1 stops falling due to bending. Moreover, the counterweight baffle 62 at the bottom of the friction brake block 61 moves with the friction brake block 61. Since both sides of one end of the counterweight baffle 62 are inclined, when the counterweight baffle 62 moves between the symmetrically arranged side lock plates 9, the inclined surface will push the arc-shaped turning plate 94 to move outward. Since the rotating sleeve 91 and the support column 10 are rotationally matched, when the arc-shaped turning plate 94 moves outward, it will push the other arc-shaped clamping plate 92 to move closer to each other, and the brake pads 93 at the end of the arc-shaped clamping plate 92 are pressed against the side of the sliding guide rail 3 through the extrusion force, and the friction at the connection part has a braking effect on the lifting cage 1, cooperating with the friction brake block 61 to improve the braking effect on the lifting cage 1. The protection mechanism can be automatically triggered by weightlessness, which can improve the response time of the protection structure, so as to quickly protect the falling lifting cage;

[0059] When manually resetting, it is necessary to first rotate the friction brake block 61 to the side of the limit cam 51, and then push the cross bar 81 to move to the right until the end of the cross bar 81 fits against the side of the friction brake block 61. At this time, the L-shaped baffle 82 will drive the trapezoidal limit block 83 to move downward until the trapezoidal limit block 83 is clamped in the limit card slot 85. The self-weight of the friction brake block 61 will exert a leftward thrust on the cross bar 81. Due to the mutual cooperation of the trapezoidal limit block 83 and the limit card slot 85, the cross bar 81 is limited, thereby locking the position of the friction lock 6.

[0060] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A mine hoist shaft protection device, characterized in that: The invention comprises a lifting cage (1), a locking assembly is fixedly connected to the lifting cage (1) in a rectangular array, and a sliding guide rail (3) corresponding to the locking assembly is provided on the side of the lifting cage (1), wherein the sliding guide rail (3) is arranged in a rectangular array around the lifting cage (1); The locking assembly comprises a sliding roller (5), the sliding roller (5) having a limiting concave wheel (51) in contact with the sliding guide rail (3), a rotating shaft (52) being fixedly connected in the limiting concave wheel (51), and both ends of the rotating shaft (52) are provided with symmetrically arranged mounting bearings (53), wherein both ends of the rotating shaft (52) are movably connected to the supporting side plates (4) via the mounting bearings (53); One side of the limiting cam (51) is movably connected to a friction locker (6) via a mounting bearing (53), and an end of the friction locker (6) away from the limiting cam (51) is provided with a locking trigger locker (8), and the trigger locker (8) is mounted in the hollow bracket (7).

2. The mine hoist shaft protection device according to claim 1, characterized in that: The trigger lock (8) comprises a cross bar (81) which is fitted with the side of the friction lock (6), and a limit slot (85) is provided at the rear of the cross bar (81), and an L-shaped baffle (82) is vertically arranged at the rear of the cross bar (81), and a trapezoidal limit block (83) corresponding to the limit slot (85) is integrally provided on one side of the L-shaped baffle (82) close to the cross bar (81), and the bottom of the trapezoidal limit block (83) is inserted into the limit slot (85).

3. The mine hoist shaft protection device according to claim 2, characterized in that: The side surface of the trapezoidal limit block (83) is in contact with the side of the limit slot (85) close to the friction locker (6); the cross bar (81) horizontally penetrates the inner side of the hollow bracket (7); the L-shaped baffle (82) is vertically arranged on the inner side of the hollow bracket (7); a trigger lead block (84) is arranged below the L-shaped baffle (82), and the trigger lead block (84) is slidably connected to the inner side of the hollow bracket (7).

4. The mine hoist shaft protection device according to claim 3 is characterized in that: The friction locker (6) comprises a friction brake block (61), which is L-shaped as a whole, and the bending part of the friction brake block (61) is arranged in an arc shape corresponding to the sliding roller (5). The bottom of the friction brake block (61) is fixedly connected to a counterweight baffle (62), and the end of the counterweight baffle (62) away from the cross bar (81) is provided with a symmetrical inclined surface.

5. The mine hoist shaft protection device according to claim 4, characterized in that: The end of the friction brake block (61) away from the counterweight baffle (62) is fixedly connected with a symmetrical inclined extension plate (63), and the inclined extension plates (63) are respectively arranged on both sides of the limiting cam (51), and any one of the inclined extension plates (63) is located between the limiting cam (51) and the supporting side plate (4). The end of the inclined extension plate (63) away from the friction brake block (61) is provided with a bearing hole (64), and the outer ring of the mounting bearing (53) is interference fit with the bearing hole (64).

6. The mine hoist shaft protection device according to claim 5, characterized in that: A symmetrical support column (10) is provided at one end of the support side plate (4) away from the friction locker (6), and the symmetrical support columns (10) are located on both sides of the limiting cam (51), and the bottom of the support column (10) is movably connected to a side locking plate (9), and the side locking plate (9) is located below the limiting cam (51).

7. The mine hoist shaft protection device according to claim 6, characterized in that: The side locking plate (9) includes a rotating sleeve (91) sleeved on the outside of the support column (10), and the rotating sleeve (91) and the support column (10) are rotatably matched, wherein one end of the rotating sleeve (91) is fixedly connected to an arc-shaped clamping plate (92), and the other end of the rotating sleeve (91) is fixedly connected to an arc-shaped flip plate (94).

8. The mine hoist shaft protection device according to claim 7, characterized in that: in, The arc-shaped holding plate (92) is arranged in an arc shape toward a side away from the limiting cam (51), while the arc-shaped flip plate (94) is arranged in an arc shape toward a side close to the limiting cam (51), and an end of the arc-shaped flip plate (94) away from the rotating sleeve (91) is arranged corresponding to an inclined surface of an end of the counterweight baffle (62).

9. The mine hoist shaft protection device according to claim 8, characterized in that: One end of the arc-shaped clamping plate (92) away from the rotating sleeve (91) is fixedly connected to a brake pad (93), and the brake pads (93) are symmetrically arranged on both sides of the sliding guide rail (3).

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