Large-inclination track mine car double-line hoisting and conveying system and conveying method

Abstract

The present application is open-pit mine large-dip angle track mine car double-line lifting conveying system and conveying method, belongs to the field of ore transportation, the purpose is to transport ore quickly, efficiently and safely. It includes left lifting conveying line, right lifting conveying line and main drive system; the left lifting conveying line and the right lifting conveying line have the same structure and are symmetrically arranged side by side; the left steel wire rope is arranged reversely above and below the out-rope position of the left winding drum device and the right steel wire rope is arranged reversely above and below the out-rope position of the right winding drum device, the left winding drum device and the right winding drum device are driven by the main drive system to rotate synchronously, so that the steel wire rope pulls the corresponding mine car to run along the corresponding track. Through the double-line arrangement of the left and right lifting conveying lines, the conveying capacity is improved, and the lifting conveying cost is greatly reduced. Through the method of "ore taking elevator", the rapid, safe, efficient ore transportation is ensured, the transportation distance is effectively shortened, the ore transportation cost and carbon emission are greatly reduced, and the safe, green, high-quality and intelligent development of the mine can be realized.

Description

Technical Field

[0001] This invention belongs to the field of ore transportation technology, specifically relating to a double-line hoisting and conveying system and method for open-pit mine steep-angle track mine cars. Background Technology

[0002] Currently, the transportation of ore in open-pit mines both domestically and internationally typically employs three methods: mining trucks, belt conveyors, and rail transport, or a combination of these three methods. Each of these methods has its own characteristics: belt conveyors offer advantages such as continuous transport, large transport capacity, and high efficiency, but also have high operating costs and a high failure rate, and require a small conveying inclination angle (≤15 degrees, generally not exceeding ≤13 degrees); rail transport features large transport capacity and high efficiency, but has higher construction and maintenance costs, and requires a small conveying inclination angle (maximum gradient not exceeding 2.5%, ≤1.5 degrees), and is usually located at the top of the mine, forming a combined transport system with mining trucks or belt conveyors; mining truck transport offers advantages such as high flexibility and adaptability, but also has high costs and poses safety hazards and environmental pollution problems, making it the primary transportation method in open-pit mines.

[0003] As open-pit mining deepens, belt conveyors and rail transport, limited by their inclination angles, can no longer meet the requirements for conveying at steep angles. Currently, electric shovels are primarily used for excavation and loading, followed by mining trucks for transport. However, the deeper the open-pit mining, the longer the ore transport distance, the steeper the slope, the longer the ramp, and the greater the climbing height. Mining trucks transporting fully loaded ore from the bottom of the mine along the mine roadway to the crushing station or stockpile at the top of the mine result in a round trip distance far exceeding the economical transport distance. These problems not only lead to low transport efficiency but also cause a significant increase in consumables such as spare parts, fuel, and tires, resulting in substantial cost increases. This also hinders the widespread adoption of electric mining trucks in mines. Summary of the Invention

[0004] The purpose of this invention is to address the drawbacks of electric shovel excavation and loading and mining truck transportation methods, and to provide a double-line hoisting and conveying system and method for large-angle track mining cars in open-pit mines, so as to transport ore quickly, efficiently and safely, significantly reduce ore transportation costs and carbon emissions, and achieve green, high-quality and intelligent development of mines.

[0005] The technical solution adopted in this invention is: a double-line hoisting and conveying system for large-angle track mine cars in open-pit mines, including a left hoisting and conveying line, a right hoisting and conveying line and a main drive system; the left hoisting and conveying lines and the right hoisting and conveying lines have the same structure, are arranged side by side and symmetrically, and the center line of the entire conveying system is set.

[0006] The left hoisting conveyor line includes a left drum device, a left wire rope, a left track beam, and a left mine car. There are two sets of left track beams, symmetrically mounted on both sides of the center line of the left hoisting conveyor line, with each set extending upwards from the bottom of the mine pit to the top. Each set of left track beams is equipped with a track. The left mine car is movably mounted on the track along the extension direction of the left track beam. The left drum device includes a first left drum and a second left drum, connected in series via a left drum coupling to form a double drum. The spiral grooves on the first and second left drums rotate in opposite directions. The left wire rope is positioned between the left drum device and the left mine car.

[0007] The right hoisting conveyor line includes a right drum device, a right wire rope, a right track beam, and a right mine car. There are two sets of right track beams, symmetrically mounted on both sides of the center line of the right hoisting conveyor line, with each set extending upwards from the bottom of the mine pit to the top. Each set of right track beams has a track. The right mine car is movably mounted on the track along the extension direction of the right track beam. The right drum device includes a first right drum and a second right drum, connected in series via a right drum coupling to form a double drum. The spiral grooves on the first and second right drums rotate in opposite directions. The right wire rope is positioned between the right drum device and the right mine car.

[0008] The exit position of the left wire rope on the left drum device is opposite to that of the exit position of the right wire rope on the right drum device, and they are set up one up and one down. The left and right drum devices are connected to the main drive system, which drives the left and right drum devices to rotate synchronously, so that the wire rope pulls the corresponding mine car to run up and down along the corresponding track.

[0009] Furthermore, two sets of left moving pulley blocks are arranged on the left mine car; after the left mine car is installed on the track, the two sets of left moving pulley blocks are symmetrical to the center line of the left hoisting and conveying line; two sets of left balancing pulley blocks are set diagonally above the top of the left track beam, and the two sets of left balancing pulley blocks are symmetrical to the center line of the left hoisting and conveying line; two sets of left redirecting pulley blocks are set between the top of the left track beam and the left drum device, and the two sets of left redirecting pulley blocks are symmetrical to the center line of the left hoisting and conveying line; a set of left tensioning pulley blocks is set in the middle of the two sets of left balancing pulley blocks. One end of the left wire rope is fixed to the left drum one, and the other end passes through the left redirecting pulley block on the left side and extends downward along the track direction to the left moving pulley block on the left side of the left mine car. After passing through the left moving pulley block on the left side of the left mine car, it extends upward along the track direction to the left balance pulley block on the left side. Then, it passes through the left balance pulley block on the left side, the left tensioning pulley block, and the left balance pulley block on the right side in sequence and extends downward along the track direction to the left moving pulley block on the right side of the left mine car. After passing through the left moving pulley block on the right side of the left mine car, it extends upward along the track direction to the left redirecting pulley block on the right side, and after passing through the left redirecting pulley block on the right side, it extends to the left drum two and is fixed to the left drum two, thus forming the left winding system of the wire rope.

[0010] Two sets of right-moving pulley blocks are arranged on both sides of the right mine car; after the right mine car is installed on the track, the two sets of right-moving pulley blocks are symmetrical to the center line of the right hoisting and conveying line; two sets of right-balancing pulley blocks are set diagonally above the top of the right track beam, and the two sets of right-balancing pulley blocks are symmetrical to the center line of the right hoisting and conveying line; a set of right-tensioning pulley blocks is set in the middle of the two sets of right-balancing pulley blocks; two sets of right-directing pulley blocks are set between the top of the right track beam and the right drum device, and the two sets of right-directing pulley blocks are symmetrical to the center line of the right hoisting and conveying line; one end of the right wire rope is fixed to the right drum. One end of the cable winds around the right-side redirecting pulley block and extends downward to the right-side moving pulley block on the right side of the right mine car. After passing the right-side moving pulley block on the right side, it extends upward to the right-side balance pulley block on the right side. Then, it winds around the right-side balance pulley block, the right tensioning pulley block, and the left-side balance pulley block in sequence and extends downward to the right-side moving pulley block on the left side of the right mine car. After passing the right-side moving pulley block on the left side of the right mine car, it extends upward to the left-side right redirecting pulley block and then winds around the left-side right redirecting pulley block before extending to the right drum two and being fixed to the right drum two, thus forming the right winding system of the wire rope.

[0011] When the wire rope winding system has a ratio of 2, no fixed pulley system is required at the mine roof. When the wire rope winding system ratio is greater than 2, two sets of fixed pulley systems need to be symmetrically installed at the mine roof for both the left and right wire rope winding systems.

[0012] Furthermore, a left disc brake is installed at the end of the left drum one; a left disc brake is installed at the end of the left drum two; a right disc brake is installed at the end of the right drum one; and a right disc brake is installed at the end of the right drum two.

[0013] Furthermore, the steps formed by mining include a step plane and a step slope connecting two adjacent step planes; the left track beam is erected on the step plane of the steps formed by mining via a left support device; the right track beam is erected on the step plane of the steps formed by mining via a right support device.

[0014] Furthermore, both the left and right support devices are positioned close to the outer side of the step plane.

[0015] Furthermore, the main drive system includes a main motor, a left transmission system, and a right transmission system. The left transmission system includes a left normally closed clutch, a left connecting shaft one, a left coupling one, a left main reducer, and a left coupling two. The right end of the left normally closed clutch is connected to the output shaft of the main motor, and its left end is connected to the left connecting shaft one. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The left end of the left coupling one is connected to the input shaft on the right side of the left main reducer, and its right end is connected to the left connecting shaft one. The right end of the left coupling two is connected to the input shaft on the left side of the left main reducer, and its left end is connected to the left connecting shaft two. A left block brake one is provided on the left coupling one, and a left block brake two is provided on the left coupling two.

[0016] The right transmission system includes a right normally closed clutch, a right connecting shaft one, a right coupling one, a right main reducer, and a right coupling two. The left end of the right normally closed clutch is connected to the output shaft of the main motor, and its right end is connected to the right connecting shaft one. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The right end of the right coupling one is connected to the input shaft on the left side of the right main reducer, and its left end is connected to the right connecting shaft one. The left end of the right coupling two is connected to the input shaft on the right side of the right main reducer, and its right end is connected to the right connecting shaft two. A right block brake one is installed on the right coupling one, and a right block brake two is installed on the right coupling two.

[0017] Furthermore, the left drum assembly is connected to the output shaft of the left main reducer via a left drum assembly coupling; the right drum assembly is connected to the output shaft of the right main reducer via a right drum assembly coupling.

[0018] Furthermore, a left slow drive system and a right slow drive system are also provided; the left slow drive system includes a left connecting shaft two, a left slow reducer and a left slow drive motor; the left slow drive motor and the input shaft of the left slow reducer are connected in three phases via a left coupling; the output shaft of the left slow reducer is connected to a left normally open clutch; one end of the left connecting shaft two is connected to the left normally open clutch, and the other end is connected to the left coupling two on the left side of the left main reducer.

[0019] The right slow drive system includes a second right connecting shaft, a right slow reducer, and a right slow drive motor; the right slow drive motor and the input shaft of the right slow reducer are connected in three phases via a right coupling; the output shaft of the right slow reducer is connected to a right normally open clutch; one end of the second right connecting shaft is connected to the right normally open clutch, and the other end is connected to the right coupling on the right side of the right main reducer.

[0020] Furthermore, an open gear pair is provided between the left drum device and the left main reducer, and between the right drum device and the right main reducer; the open gear pair consists of a pinion and a gear; the pinion is installed on the output shaft of the left main reducer and the right main reducer, and the gear is installed on the end face of the left drum and the right drum.

[0021] The conveying method using a double-track hoisting and conveying system for inclined rail cars in open-pit mines includes the following steps:

[0022] First, fully loaded mining trucks load ore into the left mining car at the bottom of the mine pit; then, fully loaded right mining cars unload ore into the empty mining truck at the top of the mine.

[0023] Next, the main motor starts rotating in the forward direction, the left hoisting conveyor line lifts the left mine car to the top of the mine, and at the same time the right hoisting conveyor line lowers the right mine car to the bottom of the mine;

[0024] Then, the fully loaded left mine car reaches the top of the mine, while the empty right mine car reaches the bottom of the mine.

[0025] Next, the unloading port at the bottom of the left mining car is opened, and the ore is unloaded into the empty mining truck below it; at the same time, the fully loaded mining truck loads ore into the right mining car at the bottom of the mine.

[0026] Finally, the main motor starts and reverses, the left hoisting conveyor line lowers the unloaded left mine car to the bottom of the mine and loads ore, while the right hoisting conveyor line lifts the fully loaded right mine car to the top of the mine and unloads ore.

[0027] The beneficial effects of this invention are as follows: This invention uses a drum device to rotate and wind up a steel wire rope to pull a mine car along a track erected from the mine pit to the mine roof to transport ore. This solves the problems of long transportation distances, high slopes, low transportation efficiency, poor economics, and the exponential increase in consumables such as spare parts, fuel, and tires in open-pit and deep-pit mines, which significantly increases costs and causes serious environmental pollution. At the same time, it solves the problem that electric mining trucks cause great damage to batteries when climbing slopes, which is not conducive to the promotion and construction of green mines.

[0028] By using a dual-line system with left and right lifting conveyor lines, the conveying capacity is doubled compared to a single line. Furthermore, the weight of the empty mine cars on both lines balances the weight of the fully loaded cars, and the motor output power is only what is needed to lift the ore, significantly reducing lifting and conveying costs. This "ore elevator" method ensures fast, safe, and efficient ore transportation, effectively shortening transport distances, significantly reducing ore transportation costs and carbon emissions, and enabling safe, green, high-quality, and intelligent development of mines. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the double-line hoisting and conveying system for inclined track mine cars in open-pit mines disclosed in this invention.

[0030] Figure 2 for Figure 1 Enlarged view of a portion at point A;

[0031] Figure 3 for Figure 1 A magnified view of section B;

[0032] Figure 4 A partially enlarged view showing an open gear pair installed at the coupling between the drive system and the drum assembly;

[0033] Figure 5 This is a schematic diagram of a mining truck.

[0034] In the diagram, 1-left hoisting and conveying line, 11-left drum device, 111-left drum one, 112-left disc brake one, 113-left drum coupling, 114-left drum two, 115-left disc brake two, 12-left wire rope, 13-left redirecting pulley block, 14-left balance pulley block, 15-left track beam, 16-left support device, 17-left moving pulley block, 18-left mine car, 19-left tensioning pulley block, 2-right hoisting and conveying line, 21-right drum device 211-Right Drum 1, 212-Right Disc Brake 1, 213-Right Drum Coupling, 214-Right Drum 2, 215-Right Disc Brake 2, 22-Right Wire Rope, 23-Right Idling Pulley Block, 24-Right Balance Pulley Block, 25-Right Track Beam, 26-Right Support Device, 27-Right Moving Pulley Block, 28-Right Mine Car, 29-Right Tensioning Pulley Block, 3-Main Drive System, 31-Main Motor, 32-Left Transmission System, 321-Left Normally Closed Clutch, 322- Left connecting shaft 1, 323-Left coupling 1, 324-Left block brake 1, 325-Left main reducer, 326-Left coupling 2, 327-Left block brake 2, 33-Right transmission system, 331-Right normally closed clutch, 332-Right connecting shaft 1, 333-Right coupling 1, 334-Right block brake 1, 335-Right main reducer, 336-Right coupling 2, 337-Right block brake 2, 4-Left slow drive system, 41-Left connecting shaft 2, 4 2-Left normally open clutch, 43-Left slow speed reducer, 44-Left coupling three, 45-Left slow speed drive motor, 5-Right slow speed drive system, 51-Right connecting shaft two, 52-Right normally open clutch, 53-Right slow speed reducer, 54-Right coupling three, 55-Right slow speed drive motor, 6-Left drum device coupling, 7-Right drum device coupling, 8-Open gear pair, 81-Pinary gear, 82-Large gear, 9-Step, 91-Step plane, 92-Step inclined plane. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] The open-pit mine steep-angle track double-track hoisting and conveying system disclosed in this invention, such as... Figure 1 and Figure 2As shown, the system includes a left hoisting conveyor line 1, a right hoisting conveyor line 2, and a main drive system 3. The left hoisting conveyor line 1 includes a left drum device 11, a left wire rope 12, a left track beam 15, and a left mine car 18. There are two sets of left track beams 15, symmetrically mounted on both sides of the center line of the left hoisting conveyor line 1, with each set extending obliquely upwards from the bottom of the mine pit to the top. Each set of left track beams 15 has a track. The left mine car 18 is movably mounted on the track along the extension direction of the left track beam 15. The left drum device 11 includes a first left drum 111 and a second left drum 114, connected in series via a left drum coupling 113 to form a double drum. The spiral grooves on the first left drum 111 and the second left drum 114 rotate in opposite directions. The left drum 111 is equipped with a left disc brake 112 at its end. Specifically, the brake disc of the left disc brake 112 is mounted on the left drum 111, and the brake pads of the left disc brake 112 are matched with the brake disc to form the safety braking system of the left drum 111. The left drum 114 is equipped with a left disc brake 115 at its end. Specifically, the brake disc of the left disc brake 115 is mounted on the left drum 114, and the brake pads of the left disc brake 115 are matched with the brake disc to form the safety braking system of the left drum 114.

[0037] The left wire rope 12 is positioned between the left drum device 11 and the left mine car 18. The left drum device 11 is connected to the main drive system 3 via the left drum device coupling 6. The main drive system 3 drives the left drum device 11 to rotate, pulling the left wire rope 12, thereby causing the left mine car 18 to move along the track on the left track beam 15. Specifically, as follows: Figure 3 and Figure 5 As shown, two sets of left moving pulley blocks 17 are arranged on both sides of the left mine car 18; after the left mine car 18 is installed on the track, the two sets of left moving pulley blocks 17 are symmetrical to the center line of the left lifting and conveying line 1; two sets of left balancing pulley blocks 14 are set diagonally above the top of the left track beam 15, and the two sets of left balancing pulley blocks 14 are symmetrical to the center line of the left lifting and conveying line 1; two sets of left redirecting pulley blocks 13 are set between the top of the left track beam 15 and the left drum device 11, and the two sets of left redirecting pulley blocks 13 are symmetrical to the center line of the left lifting and conveying line 1; a set of left tensioning pulley blocks 19 is set in the middle of the two sets of left balancing pulley blocks 14.

[0038] One end of the left wire rope 12 is fixed to the left drum 111, and the other end passes through the left redirecting pulley block 13 on the left side and extends downward along the track direction to the left moving pulley block 17 on the left side of the left mine car 18. After passing through the left moving pulley block 17 on the left side of the left mine car 18, it extends upward along the track direction to the left balance pulley block 14 on the left side. Then, it passes through the left balance pulley block 14 on the left side, the left tensioning pulley block 19, and the left balance pulley block 14 on the right side in sequence and extends downward along the track direction to the left moving pulley block 17 on the right side of the left mine car 18. After passing through the left moving pulley block 17 on the right side of the left mine car 18, it extends upward along the track direction to the left redirecting pulley block 13 on the right side, and after passing through the left redirecting pulley block 13 on the right side, it extends to the left drum 2 114 and is fixed to the left drum 2 114, thus forming a left winding system for the wire rope. It should be noted that if one end of the left wire rope 12 is fixed to the left end of the left drum 111, then the other end is fixed to the right end of the left drum 2 114; if one end of the left wire rope 12 is fixed to the right end of the left drum 111, then the other end is fixed to the left end of the left drum 2 114; and if one end of the left wire rope 12 is led out from the top of the left drum 111, then the other end is led out from the top of the left drum 2 114; if one end of the left wire rope 12 is led out from the bottom of the left drum 111, then the other end is led out from the bottom of the left drum 2 114.

[0039] During mining, multiple steps 9 are formed from the bottom to the top of the mine. Each step 9 formed by mining includes a step plane 91 and a step slope 92 connecting two adjacent step planes 91. The left support device 16 is installed on the step plane 91 of each step 9 formed by ore mining and close to the step slope 92 of the same step 9. It is located below the left track beam 15 and connected to the left track beam 15, and is used to fix and support the left track beam 15 and transfer the load.

[0040] The left mine car 18 is equipped with wheels that match the track of the left track beam 15. Under the traction of the left wire rope 12, the left mine car 18 runs along the track on the left track beam 15, realizing the lifting and lowering of the left mine car 18, thereby realizing the lifting and lowering of the ore.

[0041] The right lifting conveyor line 2 adopts the same structure as the left lifting conveyor line 1, and the right lifting conveyor line 2 is parallel to the left lifting conveyor line 1 and symmetrical about the center line of the entire conveying system.

[0042] Specifically, the right hoisting conveyor line 2 includes a right drum device 21, a right wire rope 22, a right track beam 25, and a right mine car 28. There are two sets of right track beams 25, symmetrically mounted on both sides of the corresponding centerline of the right hoisting conveyor line 2, with each set extending obliquely upwards from the bottom of the mine pit to the top. Each set of right track beams 25 is equipped with a track. The right mine car 28 is movably mounted on the track along the extension direction of the right track beam 25. The right drum device 21 includes a first right drum 211 and a second right drum 214, connected in series via a right drum coupling 213 to form a double drum. The spiral grooves on the first right drum 211 and the second right drum 214 rotate in opposite directions. The right drum 211 is equipped with a right disc brake 212 at its end. Specifically, the brake disc of the right disc brake 212 is mounted on the right drum 211, and the brake disc of the right disc brake 212 and its brake pads are matched to form the safety braking system of the right drum 211. The right drum 214 is equipped with a right disc brake 215 at its end. Specifically, the brake disc of the right disc brake 215 is mounted on the right drum 214, and the brake disc of the right disc brake 215 and its brake pads are matched to form the safety braking system of the right drum 214.

[0043] The right wire rope 22 is positioned between the right drum device 21 and the right mine car 28. The right drum device 21 is connected to the main drive system 3 via the right drum device coupling 7. The main drive system 3 drives the right drum device 21 to rotate, pulling the right wire rope 22, thereby causing the right mine car 28 to move along the track on the right track beam 25. Specifically, as follows: Figure 3 and Figure 5 As shown, two sets of right moving pulley blocks 27 are arranged on both sides of the right mine car 28; after the right mine car 28 is installed on the track, the two sets of right moving pulley blocks 27 are symmetrical to the center line of the right hoisting and conveying line 2; two sets of right balancing pulley blocks 24 are set diagonally above the top of the right track beam 25, and the two sets of right balancing pulley blocks 24 are symmetrical to the center line of the right hoisting and conveying line 2; two sets of right redirecting pulley blocks 23 are set between the top of the right track beam 25 and the right drum device 21, and the two sets of right redirecting pulley blocks 23 are symmetrical to the center line of the right hoisting and conveying line 2. A right tensioning pulley block 29 is set in the middle of the two sets of right balancing pulley blocks 24.

[0044] One end of the right wire rope 22 is fixed to the right drum 211, and the other end passes through the right redirecting pulley block 23 on the right side and extends downward along the track direction to the right moving pulley block 27 on the right side of the right mine car 28. After passing through the right moving pulley block 27 on the right side, it extends upward along the track direction to the right balance pulley block 24 on the right side. After passing through the right balance pulley block 24 on the right side, the right tensioning pulley block 29 and the right balance pulley block 24 on the left side, it extends downward along the track direction to the right moving pulley block 27 on the left side of the right mine car 28. After passing through the right moving pulley block 27 on the left side, it extends upward to the right redirecting pulley block 23 on the left side, and after passing through the right redirecting pulley block 23 on the left side, it extends to the right drum 214 and is fixed to the right drum 214, thus forming a wire rope winding system. It should be noted that if one end of the right wire rope 22 is fixed to the left end of the right drum 211, then the other end is fixed to the right end of the right drum 214; if one end of the right wire rope 22 is fixed to the right end of the right drum 211, then the other end is fixed to the left end of the right drum 214; and if one end of the right wire rope 22 is led out from the top of the right drum 211, then the other end is led out from the top of the right drum 214; if one end of the right wire rope 22 is led out from the bottom of the right drum 211, then the other end is led out from the bottom of the right drum 214.

[0045] The right support device 26 is installed on the step plane 91 of each step 9 formed by ore mining and close to the step slope 92 of the same level step. It is located below the right track beam 25 and connected to the right track beam 25. It is used to fix and support the right track beam 25 and transmit the load.

[0046] The right mine car 28 is equipped with wheels that match the track of the right track beam 25. Under the traction of the right wire rope 22, the right mine car 28 runs along the track on the right track beam 25, realizing the lifting and lowering of the right mine car 28, thereby realizing the lifting and lowering of the ore.

[0047] The exit positions of the left wire rope 12 on the left drum device 11 and the right wire rope 22 on the right drum device 21 are reversed, one above the other. That is, when the left wire rope 12 is led out from below the two drums of the left drum device 11, the right wire rope 22 is led out from above the two drums of the right drum device 21; when the left wire rope 12 is led out from above the two drums of the left drum device 11, the right wire rope 22 is led out from below the two drums of the right drum device 21.

[0048] The left drum device 11 and the right drum device 21 are connected to the main drive system 3. The main drive system 3 drives the left drum device 11 and the right drum device 21 to rotate synchronously. Thus, the left lifting conveyor line 1, the right lifting conveyor line 2 and the main drive system 3 form two lifting conveyor lines.

[0049] Because the left wire rope 12 of the left hoisting conveyor line 1 and the right wire rope 22 of the right hoisting conveyor line 2 are positioned one above the other on the corresponding drum device, the left mine car 18 and the right mine car 28 run in opposite directions. That is, when the left hoisting conveyor line 1 is hoisting, the right hoisting conveyor line 2 is descending, and vice versa. When a fully loaded mining truck drives to the vicinity of the empty left mine car 18 on the left hoisting conveyor line 1 at the bottom of the mine and reverses to the unloading position to prepare for unloading, the empty right mine car 28 on the right hoisting conveyor line 2 is at the top of the mine. Figure 1 As shown, after the fully loaded mining truck at the bottom of the mine on the left hoisting conveyor line 1 unloads ore into the empty left mining car 18, the main motor 31 starts to rotate in the forward direction, the left hoisting conveyor line 1 lifts the fully loaded left mining car 18, and at the same time the right hoisting conveyor line 2 lowers the empty right mining car 28. When the left hoisting conveyor line 1 lifts the fully loaded left mine car 18 to the top of the mine and the right hoisting conveyor line 2 lowers the empty right mine car 28 to the bottom of the mine, the main drive system 3 stops. The fully loaded left mine car 18 unloads ore into the empty mining truck below it. At the same time, the fully loaded mining truck supplying ore to the right hoisting conveyor line 2 drives to the vicinity of the empty right mine car 28 on the right hoisting conveyor line 2, reverses to the unloading position, and unloads ore. When the left mine car 18 of the left hoisting conveyor line 1 has finished unloading ore and the bottom door of the mine car is closed and locked, and the right mine car 28 of the right hoisting conveyor line 2 is full of ore, the main motor 31 starts and reverses. The left hoisting conveyor line 1 lowers the empty left mine car 18, and at the same time, the right hoisting conveyor line 2 lifts the fully loaded right mine car 28. When the empty left mine car 18 of the left hoisting conveyor line 1 descends to the loading position at the bottom of the mine and the fully loaded right mine car 28 of the right hoisting conveyor line 2 rises to the unloading position at the top of the mine, the main drive system 3 stops. The fully loaded right mine car 28 unloads ore into the empty mining truck below it. At the same time, the fully loaded mining truck supplying ore to the left hoisting conveyor line 1 drives to the vicinity of the empty left mine car 18 of the left hoisting conveyor line 1, reverses to the unloading position, and unloads the ore. In this way, a complete ore hoisting and conveying operation of the dual-line hoisting conveyor system is realized, and two cars of ore are hoisted in each cycle. Compared with the single-line conveying method, not only is the hoisting efficiency doubled, but when the left hoisting conveyor line 1 lifts the fully loaded left mine car 18, the weight of the empty right mine car 28 of the right hoisting conveyor line 2 becomes its counterweight, balancing the weight of the left mine car 18 of the left hoisting conveyor line 1. This ensures that the actual output power of the main motor 31 of the main drive system 3 is only the power required for hoisting the ore, greatly reducing the cost of ore hoisting and conveying.

[0050] The main drive system 3 includes a main motor 31, a left transmission system 32, and a right transmission system 33.

[0051] The left transmission system 32 includes a left normally closed clutch 321, a left connecting shaft 322, a left coupling 323, a left main reducer 325, and a left coupling 326. The right end of the left normally closed clutch 321 is connected to the left output shaft of the main motor 31, and its left end is connected to the left connecting shaft 322. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The left end of the left coupling 323 is connected to the right input shaft of the left main reducer 325, and its right end is connected to the left connecting shaft 322. The right end of the left coupling 326 is connected to the left input shaft of the left main reducer 325, and its left end is connected to the left connecting shaft 321. A left block brake 324 is provided on the left coupling 323. Specifically, the brake wheel of the left block brake 324 is installed on the left coupling 323, and the brake block of the left block brake 324 is matched and installed with the brake wheel. The left coupling 326 is equipped with a left block brake 327. Specifically, the brake wheel of the left block brake 327 is mounted on the left coupling 326, and the brake blocks of the left block brake 327 are matched and installed with the brake wheel. This forms a dual-operating braking system for the left transmission system 32, and the redundant braking design ensures the safe operation of the entire transmission system.

[0052] The right transmission system 33 adopts the same structure as the left transmission system 32, and the right transmission system 33 and the left transmission system 32 are symmetrical with respect to the center line of the entire conveying system. The right transmission system 33 includes a right normally closed clutch 331, a right connecting shaft 332, a right coupling 333, a right main reducer 335, and a right coupling 336. The left end of the right normally closed clutch 331 is connected to the right output shaft of the main motor 31, and its right end is connected to the right connecting shaft 332. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The right end of the right coupling 333 is provided with a brake wheel and is connected to the left input shaft of the right main reducer 335, and its left end is connected to the right connecting shaft 332. The left end of the right coupling 336 is provided with a brake wheel and is connected to the right input shaft of the right main reducer 335, and its right end is connected to the right connecting shaft 331. The right coupling 333 is equipped with a right block brake 334. Specifically, the brake wheel of the right block brake 334 is mounted on the right coupling 333, and the brake pads of the right block brake 334 are matched and installed with its brake wheel. The right coupling 336 is equipped with a right block brake 337. Specifically, the brake wheel of the right block brake 337 is mounted on the right coupling 336, and the brake pads of the right block brake 337 are matched and installed with its brake wheel. This forms a dual-operating braking system for the left transmission system 32. The redundant braking design ensures the safe operation of the entire transmission system.

[0053] The left output shaft of the main motor 31 is connected to the left transmission system 32 via a left normally closed clutch 321, and its right output shaft is connected to the right transmission system 33 via a right normally closed clutch 331. The left drum device 11 is connected to the output shaft of the left main reducer 325 via a left drum device coupling 6. The right drum device 21 is connected to the output shaft of the right main reducer 335 via a right drum device coupling 7.

[0054] Thus, a single main motor 31 can simultaneously drive the left lifting conveyor line 1 and the right lifting conveyor line 2. Furthermore, at the coupling 6 between the left transmission system 32 of the main drive system 3 and the left drum device of the left lifting conveyor line 1, and at the coupling 7 between the right transmission system 33 and the right drum device of the right lifting conveyor line 2, when the transmission ratio cannot meet the lifting and lowering speed requirements, a set of open gear pairs 8 can be installed to replace the coupling 6 of the left drum device and the coupling 7 of the right drum device. Figure 4 As shown, the open gear pair 8 is composed of the pinion 81 and the large gear 82; the open gear pairs 8 of the left lifting conveyor line 1 and the right lifting conveyor line 2 are symmetrically arranged, the pinion 81 is installed on the output shaft of the left main reducer 325 and the right main reducer 335, and the large gear 82 is installed on the end face of the left drum 114 and the right drum 214.

[0055] To facilitate system debugging and maintenance, a left slow-speed drive system 4 and a right slow-speed drive system 5 are also provided. The left slow-speed drive system 4 includes a left connecting shaft 41, a left slow-speed reducer 43, and a left slow-speed drive motor 45. The left slow-speed drive motor 45 is connected to the input shaft of the left slow-speed reducer 43 via a left coupling 44. The output shaft of the left slow-speed reducer 43 is connected to the left end of a left normally open clutch 42, which is normally disengaged. The left end of the left connecting shaft 41 is connected to the right end of the left normally open clutch 42, and its right end is connected to the left end of the left coupling 326 on the left side of the left main reducer 325. This left slow-speed drive system 4 is used to achieve slow-speed drive of the left lifting conveyor line 1.

[0056] Similarly, the right slow drive system 5 includes a second right connecting shaft 51, a right slow reducer 53, and a right slow drive motor 55; the right slow drive motor 55 is connected to the input shaft of the right slow reducer 53 via a third right coupling 54; the output shaft of the right slow reducer 53 is connected to the right end of the right normally open clutch 52, which is in a disengaged state under normal operating conditions; the right end of the second right connecting shaft 51 is connected to the left end of the right normally open clutch 52, and its left end is connected to the right end of the second right coupling 336 on the right side of the right main reducer 335. This right slow drive system 5 is used to realize the slow drive of the right lifting conveyor line 2.

[0057] When the system is first installed at the user's site and requires debugging, the safety braking system consisting of the left disc brake 112 and the left disc brake 115 of the left lifting conveyor line 1 enters the safety braking state, disengaging the left normally closed clutch 321 of the main drive system 3 and engaging the left normally open clutch 42 of the left slow drive system 4. In this way, the left lifting conveyor line 1 is in a slow drive state under the drive of the main drive system 3 and the left slow drive system 4, and the left lifting conveyor line 1 can be debugged separately. Similarly, the safety braking system consisting of the right disc brake 212 and the right disc brake 215 of the right lifting conveyor line 2 enters the safety braking state, disengaging the right normally closed clutch 331 of the main drive system 3 and engaging the right normally open clutch 52 of the right slow drive system 5. In this way, the right lifting conveyor line 2 is in a slow drive state under the drive of the main drive system 3 and the right slow drive system 5, and the right lifting conveyor line 2 can be debugged separately. After the aforementioned debugging is completed, the operational debugging can begin. First, the operational debugging of the left lifting conveyor line 1 is performed. The left normally open clutch 42 of the left slow drive system 4 is in the normally open state, and the right normally closed clutch 331 of the main drive system 3 is disengaged. Thus, the main motor 31, the left transmission system 32, the left drum coupling 6, and the left lifting conveyor line 1 form lifting conveyor line 1, which can then be tested under no-load and load conditions. Next, the operational debugging of the right lifting conveyor line 2 is performed in the same manner. The right normally open clutch 52 of the right slow drive system 5 is in the normally open state, and the left normally closed clutch 321 of the main drive system 3 is disengaged. Thus, the main motor 31, the right transmission system 33, the right drum coupling 7, and the right lifting conveyor line 2 form lifting conveyor line 2, which can then be tested under no-load and load conditions. Finally, the entire system is debugged and tested. The left normally closed clutch 321 and the right normally closed clutch 331 of the main drive system 3 are placed in the normally closed working state. The left lifting conveyor line 1, the right lifting conveyor line 2 and the main drive system 3 form a working lifting conveyor system, so as to realize the overall debugging, no-load and load test of the entire system.

[0058] When the lifting and conveying system of the left lifting conveyor line 1 malfunctions or requires maintenance, the safety braking system consisting of the left disc brake 112 and the left disc brake 115 of the left lifting conveyor line 1 enters a safety braking state, disengaging the left normally closed clutch 321 of the main drive system 3 and engaging the left normally open clutch 42 of the left slow drive system 4. In this way, the left lifting conveyor line 1, the main drive system 3, and the left slow drive system 4 are in a slow maintenance and repair state, allowing for maintenance and repair. Maintenance and repair of the left lifting conveyor line 1 does not affect the right lifting conveyor line 2, which can continue to operate normally, but can only lift or lower one mine car at a time, reducing lifting efficiency by half. Similarly, when the lifting and conveying system of the right lifting conveyor line 2 malfunctions or has problems requiring maintenance and repair, the safety braking system composed of the right disc brake 212 and the right disc brake 215 of the right lifting conveyor line 2 enters the safety braking state, disengages the right normally closed clutch 331 of the main drive system 3, and engages the right normally open clutch 52 of the right slow drive system 5. In this way, the right lifting conveyor line 2, the main drive system 3, and the right slow drive system 5 are in a slow maintenance and repair state, and can be maintained and repaired. When the right lifting conveyor line 2 is maintained and repaired, it does not affect the left lifting conveyor line 1. The left lifting conveyor line 1 can work normally, but it can only lift or lower one mine car, reducing the lifting efficiency by half.

[0059] In the left lifting conveyor line 1, a wire rope winding system consisting of a left wire rope 12, a left redirecting pulley block 13, a left balancing pulley block 14, a left moving pulley block 17, and a left tensioning pulley block 19 is installed. In the right lifting conveyor line 2, a wire rope winding system consisting of a right wire rope 22, a right redirecting pulley block 23, a right balancing pulley block 24, a right moving pulley block 27, and a right tensioning pulley block 29 is also installed. These systems enable real-time monitoring and alarm of wire rope breakage, ensuring the safety and reliability of the system.

[0060] The hoisting and conveying system disclosed in this invention can be designed in three installation forms: fixed installation, semi-mobile, and mobile. Fixed installation refers to an installation method where the components of the hoisting and conveying system connected to the foundation are fixedly connected to the foundation by welding or anchor bolts, etc., using foundation plates and anchor bolts on the foundation. This installation method is safe and reliable, but costly, difficult to disassemble and assemble, and time-consuming. It is mainly used in open-pit mines where the components of the hoisting and conveying system do not need to be moved after installation or where the relocation interval is long. Semi-mobile installation refers to a method where the components of the hoisting and conveying system connected to the foundation are directly placed on the pre-treated ground. The foundation components themselves do not have self-moving mechanisms or power sources. They are usually designed with slippers, front and rear wedges, or tires, etc., and are moved by external traction or pushing. This installation method does not require the installation of foundation plates and anchor bolts, making relocation convenient, quick, and low-cost. It is mainly used in open-pit mines where relocation is relatively frequent after installation (usually once every six months to one year). Mobile hoisting refers to hoisting and conveying systems where the components connected to the foundation are designed with a moving mechanism and have their own power system, such as tracked walking mechanisms and tire drive systems. They are easy and quick to relocate, but have high manufacturing costs. They are mainly used in open-pit mines where frequent relocation is required after installation (usually once every 1 to 2 months).

[0061] The left track beam 15 and the right track beam 25 are erected in the air by using the left support device 16 and the right support device 26 of the track beam, so that the distance from the lower edge of the left track beam 15 and the right track beam 25 to the step plane 91 meets the conditions for traffic. This will not affect the traffic requirements of the mine, which is conducive to the upgrading and transformation of old mines and can also meet the traffic needs of new mine construction.

[0062] This lifting and conveying system replaces the traditional uphill sections transported by open-pit mine trucks with a conveying method, effectively reducing the impact of severe weather such as rain and snow on the system's operation. It avoids accidents involving personnel and vehicles caused by slippage or road entrapment that can occur with mining trucks during heavy rain or snow, which typically necessitate shutdowns. This significantly improves the system's safety, operating time, and efficiency.

[0063] The hoisting and conveying system is designed with both automatic and manual operation modes. The automatic operation mode can be combined with the mine's 5G communication and Beidou navigation system to use driverless mining trucks for transportation at the bottom and top of the mine, enabling intelligent transportation of ore throughout the mine.

[0064] When designing new mines or renovating old mines, this hoisting and conveying technology can be adopted in the design of ore conveying ramps or in the renovation of old mines. Electric mining trucks can be used for transportation at the mine top and bottom, realizing the widespread application of electric mining trucks in mines. This can not only significantly reduce transportation costs, but also reduce mine pollution emissions, enabling mines to develop in a green and environmentally friendly direction.

[0065] The hoisting and conveying system can also unload ore directly from the mine top to the crushing station. After crushing, the ore is transported by belt conveyor, further reducing ore transportation costs.

[0066] In the description of this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-track hoisting and conveying system for inclined track mine cars in open-pit mines, characterized in that: This includes the left lifting conveyor line, the right lifting conveyor line, and the main drive system; The left and right lifting conveyor lines have the same structure, are arranged side by side and symmetrically with respect to the center line of the entire conveying system; The left hoisting conveyor line includes a left drum device, a left wire rope, a left track beam, and a left mine car. There are two sets of left track beams, which are symmetrically erected on both sides of the center line of the left hoisting conveyor line, and each set of left track beams extends inclined upwards from the bottom of the mine pit to the top of the mine pit. Each set of left track beams is equipped with a track. The left mine car is moved along the track along the extension direction of the left track beam. The left drum device includes left drum one and left drum two, which are connected in series to form a double drum via a left drum coupling. The spiral grooves on left drum one and left drum two rotate in opposite directions. The left wire rope is set between the left drum device and the left mine car. The right hoisting conveyor line includes a right drum device, a right wire rope, a right track beam, and a right mine car. There are two sets of right track beams, which are symmetrically erected on both sides of the center line of the right hoisting conveyor line, and each set of right track beams extends inclined upwards from the bottom of the mine pit to the top of the mine pit. Each set of right track beams is equipped with rails. The right mine car is moved along the track along the extension direction of the right track beam. The right drum device includes right drum one and right drum two, which are connected in series to form a double drum via a right drum coupling. The spiral grooves on right drum one and right drum two rotate in opposite directions. The right wire rope is installed between the right drum device and the right mine car. The left wire rope exiting the device on the left drum and the right wire rope exiting the device on the right drum are set oppositely, one up and one down. The left and right drums are connected to the main drive system, which drives the left and right drums to rotate synchronously, so that the wire ropes pull the corresponding mine cars along the corresponding tracks. Two sets of left-moving pulley blocks are arranged on the left mine car, one on each side of the left mine car. After the left mine car is installed on the track, the two sets of left-moving pulley blocks are symmetrical to the center line of the left hoisting and conveying line. Two sets of left-balancing pulley blocks are installed diagonally above the top of the left track beam, symmetrical to the center line of the left hoisting and conveying line. Two sets of left-directing pulley blocks are installed between the top of the left track beam and the left drum device, symmetrical to the center line of the left hoisting and conveying line. A left tensioning pulley block is installed between the two sets of left-balancing pulley blocks. One end of the left wire rope is fixed. At the left drum one, the other end extends downward along the track direction after passing the left redirecting pulley block on the left side to the left moving pulley block on the left side of the left mine car. After passing the left moving pulley block on the left side, it extends upward along the track direction to the left balance pulley block on the left side. Then, it passes the left balance pulley block on the left side, the left tensioning pulley block, and the left balance pulley block on the right side in sequence, and extends downward along the track direction to the left moving pulley block on the right side of the left mine car. After passing the left moving pulley block on the right side of the left mine car, it extends upward along the track direction to the left redirecting pulley block on the right side, and then extends downward along the track direction to the left drum two and is fixed to the left drum two. Two sets of right-moving pulley blocks are arranged on the right mine car, one on each side. After the right mine car is installed on the track, the two sets of right-moving pulley blocks are symmetrical to the center line of the right hoisting and conveying line. Two sets of right-balancing pulley blocks are installed diagonally above the top of the right track beam, symmetrical to the center line of the right hoisting and conveying line. Two sets of right-directing pulley blocks are installed between the top of the right track beam and the right drum device, symmetrical to the center line of the right hoisting and conveying line. A right tensioning pulley block is installed between the two sets of right-balancing pulley blocks. The right wire rope... One end is fixed to the right drum one, and the other end passes through the right redirecting pulley block on the right side and extends downward along the track direction to the right moving pulley block on the right side of the right mine car. After passing through the right moving pulley block on the right side, it extends upward along the track direction to the right balance pulley block on the right side. After passing through the right balance pulley block on the right side, the right tensioning pulley block and the right balance pulley block on the left side in sequence, it extends downward along the track direction to the right moving pulley block on the left side of the right mine car. After passing through the right moving pulley block on the left side, it extends upward to the right redirecting pulley block on the left side, and after passing through the right redirecting pulley block on the left side, it extends to the right drum two and is fixed to the right drum two. The steps formed by mining include the step plane and the step ramp connecting two adjacent step planes; the left track beam is erected on the step plane of the steps formed by mining via the left support device; the right track beam is erected on the step plane of the steps formed by mining via the right support device; Both the left and right support devices are located close to the outer side of the step plane.

2. The double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to claim 1, characterized in that: Left disc brake 1 is installed at the end of left drum 1; left disc brake 2 is installed at the end of left drum 2; right disc brake 1 is installed at the end of right drum 1; right disc brake 2 is installed at the end of right drum 2.

3. The double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to any one of claims 1 to 2, characterized in that: The main drive system includes a main motor, a left drive system, and a right drive system; The left transmission system includes a left normally closed clutch, a left connecting shaft one, a left coupling one, a left main reducer, and a left coupling two. The right end of the left normally closed clutch is connected to the left output shaft of the main motor, and its left end is connected to the left connecting shaft one. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The left end of the left coupling one is connected to the right input shaft of the left main reducer, and its right end is connected to the left connecting shaft one. The right end of the left coupling two is connected to the left input shaft of the left main reducer, and its left end is connected to the left connecting shaft two. A left block brake one is installed on the left coupling one, and a left block brake two is installed on the left coupling two. The right transmission system includes a right normally closed clutch, a right connecting shaft one, a right coupling one, a right main reducer, and a right coupling two. The left end of the right normally closed clutch is connected to the right output shaft of the main motor, and its right end is connected to the right connecting shaft one. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The right end of the right coupling one is connected to the left input shaft of the right main reducer, and its left end is connected to the right connecting shaft one. The left end of the right coupling two is connected to the right input shaft of the right main reducer, and its right end is connected to the right connecting shaft two. A right block brake one is installed on the right coupling one, and a right block brake two is installed on the right coupling two.

4. The double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to claim 3, characterized in that: The left drum assembly is connected to the output shaft of the left main reducer via a left drum assembly coupling; the right drum assembly is connected to the output shaft of the right main reducer via a right drum assembly coupling.

5. The double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to claim 3, characterized in that: It is also equipped with a left slow drive system and a right slow drive system; The left slow drive system includes a left connecting shaft 2, a left slow reducer, and a left slow drive motor; the left slow drive motor and the input shaft of the left slow reducer are connected in three phases via a left coupling; the output shaft of the left slow reducer is connected to the left end of the left normally open clutch, which is in a disengaged state under normal operating conditions; the left end of the left connecting shaft 2 is connected to the right end of the left normally open clutch, and its right end is connected to the left end of the left coupling 2 on the left side of the left main reducer. The right slow drive system includes a second right connecting shaft, a right slow reducer, and a right slow drive motor. The right slow drive motor and the input shaft of the right slow reducer are connected in three phases via a right coupling. The output shaft of the right slow reducer is connected to the right end of the right normally open clutch, which is in a disengaged state under normal operating conditions. The right end of the second right connecting shaft is connected to the left end of the right normally open clutch, and its left end is connected to the right end of the second right coupling on the right side of the right main reducer.

6. The double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to claim 3, characterized in that: An open gear pair is provided between the left drum device and the left main reducer, and between the right drum device and the right main reducer. The open gear pair consists of a pinion and a gear. A pinion is installed on the output shaft of the left main reducer and the right main reducer, and a gear is installed on the end face of the left drum and the right drum.

7. The conveying method of the double-track hoisting and conveying system for inclined track mine cars in open-pit mines according to claim 3, characterized in that: First, fully loaded mining trucks load ore into the left mining car at the bottom of the mine pit; then, fully loaded right mining cars unload ore into the empty mining truck at the top of the mine. Next, the main motor starts rotating in the forward direction, the left hoisting conveyor line lifts the left mine car to the top of the mine, and at the same time the right hoisting conveyor line lowers the right mine car to the bottom of the mine; Then, the fully loaded left mine car reaches the top of the mine, while the empty right mine car reaches the bottom of the mine. Next, the unloading port at the bottom of the left mining car is opened, and the ore is unloaded into the empty mining truck below it; at the same time, the fully loaded mining truck loads ore into the right mining car at the bottom of the mine. Finally, the main motor starts and reverses, the left hoisting conveyor line lowers the unloaded left mine car to the bottom of the mine and loads ore, while the right hoisting conveyor line lifts the fully loaded right mine car to the top of the mine and unloads ore.

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