Inclined shaft hoisting anti-runaway system

Abstract

The present invention belongs to the technical field of underground mining inclined shaft lifting, and relates to an inclined shaft lifting anti-runaway system, including a hoist and a mine car, an anti-runaway mechanism is provided at the other end of the mine car, and the anti-runaway mechanism includes a buffer rod, the bottom end of the buffer rod is hinged with a support block arranged at the bottom of the mine car hopper, a connecting ring is provided on the back of the upper part of the buffer rod, the connecting ring is hung on a hook, the hook is fixed on a rotating shaft, the rotating shaft is connected to the upper part of the mine car hopper through a bearing seat, and one end of the rotating shaft is connected to the main shaft of a driving motor through a one-way rotating mechanism; an anti-runaway warning cylinder is provided on one side of the mine car hopper, the center line of the anti-runaway warning cylinder is parallel to the horizontal line, a sensor is provided at one end of the anti-runaway warning cylinder, and a gravity ball is provided at the other end, and an extrusion spring is sleeved on the outer periphery of the sensor, and the two ends of the extrusion spring are respectively abutted against the anti-runaway warning cylinder wall and the gravity ball. The present invention can effectively prevent the mine car from running away, improve the safety of inclined shaft lifting, and ensure the personal safety of the staff.

Description

Technical Field

[0001] The invention relates to an anti-runaway system for inclined shaft hoisting, belonging to the technical field of inclined shaft hoisting in underground mining. Background Art

[0002] Inclined shaft hoisting system is commonly used in underground mining. Inclined shaft hoisting system generally includes a hoist. The hoist uses a wire rope to pull the mine car to transport underground ore. At present, the wire rope breaks during the operation of the inclined shaft hoisting system due to excessive force or unreasonable use, which causes the mine car to run away. This poses a great safety hazard and seriously threatens the personal safety of the workers. Summary of the invention

[0003] The technical problem to be solved by the present invention is to propose a system for preventing mine cars from running away when hoisting in an inclined shaft, which can effectively prevent mine cars from running away, improve the safety of inclined shaft hoisting, and ensure the personal safety of workers.

[0004] The inclined shaft hoisting anti-runaway system described in the present invention comprises a hoist and a mine car, the hoist is connected to one end of the mine car on the slope through a steel wire rope, the hoist drives the steel wire rope to be wound and released by rotating the driving main shaft, and an anti-runaway mechanism is arranged at the other end of the mine car, the anti-runaway mechanism comprises a buffer rod, the bottom end of the buffer rod is hinged with a support block arranged at the bottom of the mine car hopper, a connecting ring is arranged on the back of the upper part of the buffer rod, the connecting ring is hung on the hook, the hook is fixed on the rotating shaft, the rotating shaft is connected to the upper part of the mine car hopper through a bearing seat, and one end of the rotating shaft is connected to the main shaft of the driving motor through a one-way rotating mechanism, and the top of the buffer rod is in a pointed cone shape; an anti-runaway warning cylinder is arranged on one side of the mine car hopper, the center line of the anti-runaway warning cylinder is parallel to the horizontal line, a sensor is arranged at one end of the anti-runaway warning cylinder, and a gravity ball is arranged at the other end, an extrusion spring is sleeved on the outer periphery of the sensor, and the two ends of the extrusion spring are respectively abutted against the wall of the anti-runaway warning cylinder and the gravity ball, the sensor is electrically connected to the control unit, and the control unit controls the driving motor.

[0005] Under normal working conditions, the hoist drives the wire rope to complete winding and unwinding at a uniform speed through the rotation of the driving main shaft, so that the wire rope drives the mine car to complete the upward and downward movement along the slope of the inclined shaft; under normal working conditions, the gravity ball is far away from the sensor under the action of the extrusion spring force. When the wire rope pulling the mine car breaks, the mine car loses the force in an instant, and the downward speed increases. Under the action of inertia, the gravity ball compresses the extrusion spring and collides with the sensor. The sensor transmits the signal to the control unit, and the control unit controls the drive motor to work. The drive motor drives the shaft to rotate through the one-way rotation mechanism, and the shaft rotation drives the hook to rotate. The hook rotates out of the connecting ring, and the buffer rod quickly falls in the direction of the slope under the action of gravity. The top of the buffer rod in a pointed cone shape quickly inserts into the slope surface to prevent the mine car from continuing to slide down. After the wire rope is repaired, the hook is connected to the connecting ring on the back of the upper part of the buffer rod by manually rotating the shaft, and it is ready for use again; under normal working conditions, the buffer rod is far away from the slope surface and will not affect the normal operation of the mine car.

[0006] Preferably, a claw is additionally provided on the top of the front side of the buffer rod, and the claw has a chance to directly penetrate into the slope surface at the moment when the buffer rod hits the slope surface, thereby providing another layer of protection against running away.

[0007] Preferably, a counterweight block is added to the upper part of the back side of the buffer rod to increase the force of the buffer rod when it hits the slope surface, which is more conducive to preventing the mine car from continuing to slide.

[0008] Preferably, the unidirectional rotating mechanism includes a sleeve, one end of which is connected and fixed to the main shaft of the driving motor, one end of a rotating shaft is inserted in the inner diameter of the sleeve, and ratchet teeth are provided on the outer periphery of the rotating shaft inserted into the inner diameter of the sleeve; a mounting groove is provided on one side of the inner wall of the sleeve, and a ratchet pawl is provided at one end in the mounting groove, one end of the ratchet pawl is spherical, and the other end is rod-shaped, one end of the spherical ratchet pawl is embedded in one end of the mounting groove, and one end of the spherical ratchet pawl is rotatably matched with one end of the mounting groove, one end of the rod-shaped ratchet pawl is inserted between two ratchet teeth, and a torsion spring is fixed in the other end of the mounting groove, and two rotating arms of the torsion spring are respectively fixed to the inner wall of the sleeve and the first rod-shaped end of the ratchet pawl. The main shaft of the driving motor drives the sleeve to rotate, and the ratchet pawl on the sleeve pushes the ratchet teeth to rotate under the action of the torsion spring, thereby driving the rotating shaft to rotate, and finally the rotation of the rotating shaft drives the hook to rotate away from the connecting ring; when the hook needs to be reset, the rotating shaft can be manually rotated to the appropriate position without starting the driving motor again, so that the driving motor is only related to the sensor signal, thereby improving the reliability of the driving motor's action.

[0009] Preferably, a manual rotating block is provided at the other end of the rotating shaft to facilitate manual operation of the rotating shaft.

[0010] Preferably, a transition wheel is added between the hoist and the mine car, the transition wheel is installed on the transition frame, the wire rope is wound around the outer periphery of the transition wheel, the transition wheel is connected to the safety wheel through a connecting shaft, one end of the safety rope is wound around the outer periphery of the safety wheel, and the other end of the safety rope is tied to the mine car; a brake mechanism is provided on one side of the safety wheel. Under normal working conditions, when the mine car moves upward, the hoist reels the wire rope, and the wire rope wound around the outer periphery of the transition wheel drives the transition wheel to rotate, and the wire rope at the front end of the mine car is continuously wound around the transition wheel; when the mine car moves downward, the hoist releases the rope, and the transition wheel rotates under the gravity of the mine car itself. When the mine car moves upward or downward, the transition wheel rotates, driving the safety wheel to rotate at the same speed. Under normal working conditions, the safety rope has no effect on the mine car. When the wire rope breaks, the brake mechanism acts immediately. At this time, the safety rope acts to limit the mine car from continuing to slide.

[0011] Preferably, the brake mechanism comprises a fixed block, one end of which is fixedly connected to the safety wheel, the other end of which is hinged to the corner of the L-shaped connecting rod, one end of a support rod of the L-shaped connecting rod is provided with a centrifugal block, one end of another support rod of the L-shaped connecting rod is hinged to one end of the brake rod, the other end of the brake rod is provided with a brake block, and one support rod of the L-shaped connecting rod provided with the centrifugal block is connected to the brake rod through a tension spring; the brake block is directly opposite to the brake disc arranged on the transition frame. When the mine car moves at a uniform speed, the safety wheel rotates, and the centrifugal force exerted on the centrifugal block is offset by the tension spring; when the wire rope breaks, the speed of the safety wheel increases, and the force of the tension spring is insufficient to offset the centrifugal force exerted on the centrifugal block, so the centrifugal block drives the L-shaped connecting rod to rotate, and the rotation of the L-shaped connecting rod drives the brake rod and the brake block to move toward the brake disc, and the brake block is in close contact with the brake disc, preventing the safety wheel from continuing to rotate, so that the safety rope prevents the mine car from continuing to slide, and the auxiliary anti-runaway mechanism effectively stops the mine car from sliding, reducing safety risks.

[0012] Preferably, the number of the braking mechanisms is 2-4, and the multiple braking mechanisms are evenly distributed on one side of the safety wheel.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The structure of the invention is reasonably designed, and can effectively prevent the mine car from running away, thereby improving the safety of inclined shaft hoisting and ensuring the personal safety of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , Structural diagram of the anti-runaway system for inclined shaft hoisting;

[0016] Figure 2 , Figure 1 Middle A is a partial enlarged view;

[0017] Figure 3 , an enlarged view of the top structure of the buffer rod;

[0018] Figure 4 , schematic diagram of the front end structure of the mine car;

[0019] Figure 5 , schematic diagram of the one-way rotating mechanism structure;

[0020] Figure 6 , schematic diagram of the braking mechanism structure.

[0021] In the figure: 1. hoist; 2. wire rope; 3. mine car; 4. ramp; 5. transition wheel; 6. anti-runaway warning cylinder; 7. extrusion spring; 8. sensor; 9. gravity ball; 10. support block; 11. buffer rod; 12. drive motor; 13. counterweight block; 14. claw thorn; 15. connecting ring; 16. sleeve; 17. hook; 18. shaft; 19. manual rotating block; 20. ratchet teeth; 21. torsion spring; 22. mounting groove; 23. ratchet claw; 24. transition frame; 25. connecting shaft; 26. safety wheel; 27. safety rope; 28. fixing block; 29. ​​L-shaped connecting rod; 30. tension spring; 31. centrifugal block; 32. brake block; 33. brake rod; 34. brake disc. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] like Figure 1-Figure 6 The inclined shaft hoisting anti-runaway system of the present invention comprises an elevator 1 and a mine car 3. The elevator 1 is connected to one end of the mine car 3 on the slope 4 through a steel wire rope 2. The elevator 1 drives the steel wire rope 2 to reel in and unreel by rotating the driving main shaft. The other end of the mine car 3 is provided with an anti-runaway mechanism. The anti-runaway mechanism comprises a buffer rod 11. The bottom end of the buffer rod 11 is hinged to a support block 10 arranged at the bottom of the hopper of the mine car 3. A connecting ring 15 is provided on the back of the upper part of the buffer rod 11. The connecting ring 15 is hung on a hook 17. The hook 17 is fixed on a rotating shaft 18. The rotating shaft 18 It is connected to the upper part of the hopper of the mine car 3 through a bearing seat, and one end of the rotating shaft 18 is connected to the main shaft of the driving motor 12 through a one-way rotating mechanism, and the top of the buffer rod 11 is in a pointed cone shape; an anti-runaway warning cylinder 6 is provided on one side of the hopper of the mine car 3, and the center line of the anti-runaway warning cylinder 6 is parallel to the horizontal line. A sensor 8 is provided at one end of the anti-runaway warning cylinder 6, and a gravity ball 9 is provided at the other end. An extrusion spring 7 is sleeved on the outer periphery of the sensor 8, and the two ends of the extrusion spring 7 are respectively abutted against the wall of the anti-runaway warning cylinder 6 and the gravity ball 9. The sensor 8 is electrically connected to the control unit, and the control unit controls the driving motor 12.

[0024] In this embodiment:

[0025] A piercing claw 14 is added to the top of the front side of the buffer rod 11. The piercing claw 14 has the opportunity to directly penetrate into the four sides of the slope at the moment when the buffer rod 11 hits the four sides of the slope, providing another layer of protection to prevent the mine car 3 from sliding away. A counterweight 13 is added to the upper part of the back side of the buffer rod 11 to increase the force of the buffer rod 11 at the moment when it hits the four sides of the slope, which is more conducive to preventing the mine car 3 from continuing to slide.

[0026] The unidirectional rotating mechanism includes a sleeve 16, one end of which is connected and fixed to the main shaft of the driving motor 12, one end of a rotating shaft 18 is inserted into the inner diameter of the sleeve 16, and a ratchet tooth 20 is provided on the outer periphery of the rotating shaft 18 inserted into the inner diameter of the sleeve 16; a mounting groove 22 is provided on one side of the inner wall of the sleeve 16, and a ratchet pawl 23 is provided at one end in the mounting groove 22, one end of the ratchet pawl 23 is spherical, and the other end is rod-shaped, one end of the spherical ratchet pawl 23 is embedded in one end of the mounting groove 22, and one end of the spherical ratchet pawl 23 is rotatably matched with one end of the mounting groove 22, one end of the rod-shaped ratchet pawl 23 is inserted between two ratchet teeth 20, and a torsion spring 21 is fixed at the other end in the mounting groove 22, and two rotating arms of the torsion spring 21 are respectively fixed to the inner wall of the sleeve 16 and the first rod-shaped end of the ratchet pawl 23. The main shaft of the driving motor 12 drives the sleeve 16 to rotate, and the ratchet claw 23 on the sleeve 16 pushes the ratchet teeth 20 to rotate under the action of the torsion spring 21, thereby driving the rotating shaft 18 to rotate, and finally realizing the rotation of the rotating shaft 18 to drive the hook 17 to rotate away from the connecting ring 15; when the hook 17 needs to be reset, the rotating shaft 18 can be manually rotated to a suitable position without starting the driving motor 12 again, so that the driving motor 12 is only related to the signal of the sensor 8, thereby improving the reliability of the driving motor 12. A manual rotating block 19 is provided at the other end of the rotating shaft 18 to facilitate manual operation of the rotating shaft 18.

[0027] A transition wheel 5 is added between the hoist 1 and the mine car 3. The transition wheel 5 is installed on the transition frame 24. The wire rope 2 is wound around the outer periphery of the transition wheel 5. The transition wheel 5 is connected to the safety wheel 26 through the connecting shaft 25. One end of the safety rope 27 is wound around the outer periphery of the safety wheel 26, and the other end of the safety rope 27 is tied to the mine car 3. A braking mechanism is provided on one side of the safety wheel 26. Under normal working conditions, when the mine car 3 moves upward, the hoist 1 winds up the wire rope 2, and the wire rope 2 wound around the outer periphery of the transition wheel 5 drives the transition wheel 5 to rotate, and the wire rope 2 at the front end of the mine car 3 is continuously wound around the transition wheel 5; when the mine car 3 moves downward, the hoist 1 releases the rope, and the transition wheel 5 rotates under the gravity of the mine car 3 itself. When the mine car 3 moves upward or downward, the transition wheel 5 rotates, driving the safety wheel 26 to rotate at the same speed. Under normal working conditions, the safety rope 27 has no effect on the mine car 3. When the wire rope 2 breaks, the braking mechanism immediately acts, and at this time the safety rope 27 acts to limit the mine car 3 from continuing to slip.

[0028] The braking mechanism includes a fixed block 28, one end of the fixed block 28 is fixedly connected to the safety rotating wheel 26, the other end of the fixed block 28 is hinged to the corner of the L-shaped connecting rod 29, one end of a supporting rod of the L-shaped connecting rod 29 is provided with a centrifugal block 31, one end of the other supporting rod of the L-shaped connecting rod 29 is hinged to one end of a brake rod 33, the other end of the brake rod 33 is provided with a brake block 32, and one supporting rod of the L-shaped connecting rod 29 provided with the centrifugal block 31 is connected to the brake rod 33 through a tensioning spring 30; the brake block 32 is directly opposite to the brake disc 34 arranged on the transition frame 24. When the mine car 3 moves at a constant speed, the safety wheel 26 rotates, and the centrifugal force on the centrifugal block 31 is offset by the tension spring 30; when the wire rope 2 breaks, the speed of the safety wheel 26 increases, and the force of the tension spring 30 is insufficient to offset the centrifugal force on the centrifugal block 31, so the centrifugal block 31 drives the L-shaped connecting rod 29 to rotate, and the L-shaped connecting rod 29 rotates to drive the brake rod 33 and the brake block 32 to move toward the brake disc 34, and the brake block 32 is in close contact with the brake disc 34, preventing the safety wheel 26 from continuing to rotate, so that the safety rope 27 prevents the mine car 3 from continuing to slip, and the auxiliary anti-slip mechanism effectively stops the mine car 3 from slipping, reducing the safety risk. The number of brake mechanisms is 2-4, and multiple brake mechanisms are evenly distributed on one side of the safety wheel 26.

[0029] Under normal working conditions, the hoist 1 drives the wire rope 2 to complete winding and unwinding at a uniform speed by rotating the driving main shaft, so that the wire rope 2 drives the mine car 3 to complete upward and downward movement along the inclined slope 4 of the inclined shaft; under normal working conditions, the gravity ball 9 is away from the sensor 8 under the action of the extrusion spring 7 force. When the wire rope 2 pulling the mine car 3 breaks, the mine car 3 loses the force in an instant, and the downward speed increases. Under the action of inertia, the gravity ball 9 compresses the extrusion spring 7 and collides with the sensor 8. The sensor 8 transmits a signal to the control unit, and the control unit controls the drive motor 12 to work. The drive motor 12 drives the rotating shaft 18 to rotate through the unidirectional rotation mechanism. The rotation of the rotating shaft 18 drives the hook 17 to rotate. The hook 17 rotates out of the connecting ring 15, and the buffer rod 11 falls rapidly toward the slope 4 under the action of gravity. The top of the buffer rod 11 in a pointed cone shape is quickly inserted into the slope 4 to prevent the mine car 3 from continuing to slide down. After the wire rope 2 is repaired, the hook 17 is connected to the connecting ring 15 on the upper back of the buffer rod 11 by manually rotating the rotating shaft 18, so that it is ready for reuse; in normal working state, the buffer rod 11 is away from the slope 4 and will not affect the normal operation of the mine car 3.

Claims

1. An inclined shaft hoisting anti-runaway system, comprising a hoist (1) and a mine car (3), wherein the hoist (1) is connected to one end of the mine car (3) on the slope (4) via a steel wire rope (2), and the hoist (1) drives the steel wire rope (2) to reel in and unreel by rotating a main shaft. Features: The other end of the mine car (3) is provided with an anti-runaway mechanism, which includes a buffer rod (11), the bottom end of the buffer rod (11) is hinged to a support block (10) arranged at the bottom of the hopper of the mine car (3), and the upper back of the buffer rod (11) is provided with a connecting ring (15), the connecting ring (15) is hung on a hook (17), the hook (17) is fixed on a rotating shaft (18), the rotating shaft (18) is connected to the upper part of the hopper of the mine car (3) through a bearing seat, and one end of the rotating shaft (18) is connected to the driving motor (1) through a one-way rotating mechanism. 2) the main shaft is connected, and the top of the buffer rod (11) is in a pointed cone shape; an anti-running warning cylinder (6) is provided on one side of the hopper of the mine car (3), the center line of the anti-running warning cylinder (6) is parallel to the horizontal line, a sensor (8) is provided at one end of the anti-running warning cylinder (6), and a gravity ball (9) is provided at the other end, an extrusion spring (7) is sleeved on the outer periphery of the sensor (8), and the two ends of the extrusion spring (7) are respectively in contact with the wall of the anti-running warning cylinder (6) and the gravity ball (9), and the sensor (8) is electrically connected to the control unit, and the control unit controls the drive motor (12); A claw thorn (14) is additionally provided at the top end of the front side of the buffer rod (11); the unidirectional rotating mechanism comprises a sleeve (16), one end of the sleeve (16) is connected and fixed to the main shaft of the driving motor (12), one end of a rotating shaft (18) is inserted into the inner diameter of the sleeve (16), and ratchet teeth (20) are provided on the outer periphery of the rotating shaft (18) inserted into the inner diameter of the sleeve (16); a mounting groove (22) is provided on one side of the inner wall of the sleeve (16), a ratchet claw (23) is provided at one end of the mounting groove (22), and the ratchet claw (23) is provided. 3) one end is spherical and the other end is rod-shaped, one end of the spherical ratchet pawl (23) is embedded in one end of the mounting groove (22), and one end of the spherical ratchet pawl (23) is rotatably matched with one end of the mounting groove (22), one end of the rod-shaped ratchet pawl (23) is inserted between two ratchet teeth (20), and a torsion spring (21) is fixed to the other end of the mounting groove (22), and two rotating arms of the torsion spring (21) are respectively fixed to the inner wall of the sleeve (16) and the first rod-shaped end of the ratchet pawl (23).

2. The inclined shaft hoisting anti-runaway system according to claim 1, Features: A counterweight block (13) is additionally provided on the upper back side of the buffer rod (11).

3. The inclined shaft hoisting anti-runaway system according to claim 1, Features: A manual rotating block (19) is provided at the other end of the rotating shaft (18).

4. The inclined shaft hoisting anti-runaway system according to any one of claims 1 to 3, Features: A transition wheel (5) is provided between the hoist (1) and the mine car (3). The transition wheel (5) is mounted on a transition frame (24). A steel wire rope (2) is wound around the outer periphery of the transition wheel (5). The transition wheel (5) is connected to a safety wheel (26) via a connecting shaft (25). One end of a safety rope (27) is wound around the outer periphery of the safety wheel (26). The other end of the safety rope (27) is tied to the mine car (3). A brake mechanism is provided on one side of the safety wheel (26).

5. The inclined shaft hoisting anti-runaway system according to claim 4, Features: The brake mechanism comprises a fixed block (28), one end of the fixed block (28) is fixedly connected to the safety rotating wheel (26), the other end of the fixed block (28) is hinged to the corner of the L-shaped connecting rod (29), one end of a support rod of the L-shaped connecting rod (29) is provided with a centrifugal block (31), one end of another support rod of the L-shaped connecting rod (29) is hinged to one end of a brake rod (33), the other end of the brake rod (33) is provided with a brake block (32), and one support rod of the L-shaped connecting rod (29) provided with the centrifugal block (31) is connected to the brake rod (33) via a tension spring (30); the brake block (32) is directly opposite to a brake disc (34) arranged on the transition frame (24).

6. The inclined shaft hoisting anti-runaway system according to claim 5, Features: The number of the braking mechanisms is 2-4, and the multiple braking mechanisms are evenly distributed on one side of the safety rotating wheel (26).

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