Winding device for long-distance belt replacement of large mine

Abstract

The winding device for replacing the long-distance belt of the large mine has the advantages that the number of vulcanization joints of the long-distance belt can be reduced, a plurality of belt coils are spliced and vulcanized into the belt coil length required by a working belt in advance by utilizing the device before the belt is replaced and shut down for maintenance, the maintenance safety risk can be reduced, and the like. And the device is particularly suitable for being applied to a large mine with a winch belt with the length exceeding 400m and a long distance.

Description

Technical Field

[0001] The present invention relates to a hoisting device for replacing long-distance belts in large mines, and is particularly suitable for applications in large mines with long-distance belts exceeding 400m in length. Background Art

[0002] Belt conveyors have the advantages of large conveying capacity and low operating cost, and are widely used in industries such as large mines, metallurgy, and coal. For large long-distance belt conveyors, the most important maintenance item is to replace the belt. The core content includes removing the old belt, installing the new belt, and vulcanizing the belt joints. Among them, the vulcanization of belt joints takes a long time (it takes about 18 hours to complete the vulcanization of one belt joint), which directly affects the equipment operation rate and has an important impact on the production efficiency of the mine.

[0003] For large long-distance belts with a length exceeding 400m, due to the limitation of the weight of a single belt roll, they are usually spliced by more than two belt rolls. Conventional new belt installation schemes all require the assistance of large cranes. During the operation, it is easy to have unstable hoisting of the belt roll and uncontrollable placement speed, resulting in low installation efficiency and high operation risk of the new belt. Similarly, when removing large old belts, conventional removal schemes require towing with engineering vehicles, which have high requirements for the site. At the same time, it is necessary to manually tie the belt frequently. The longer the belt, the longer the time-consuming and the higher the operation risk. In addition, for the vulcanization work of large long belts, due to the limited length of the new belt roll, the longer the belt, the more joints need to be vulcanized. The conventional long-belt vulcanization method is to vulcanize the new belt joints after installing the new belt, and then continue to install the new belt in turn. Therefore, the longer the belt, the longer the installation-vulcanization-installation cross-operation and maintenance time, and the higher the risk.

[0004] To solve the above problems, Chinese Patent CN 213771126 U has successively disclosed "a mine hoist with safety protection function", which includes a support frame, a transfer fixing mechanism and a motor. For this mine hoist, first, by setting a motor protector, a brake and a guardrail, it can prevent the motor from burning out due to jamming during the rotation of the drum, and brake and protect the rotation. Second, a shock absorber is provided on the brake to prevent the brake from being damaged and play a role in damping the brake. Third, a guardrail is set on the drum to protect the staff. Chinese Patent CN 221543979 U has disclosed "a lightweight hoist", which includes the first and second brackets, a motor, a limit seat, a fixing mechanism and a shock absorber. For this lightweight hoist, first, by using a fixing mechanism, an anti-skip rope limiting mechanism and a shock absorption component, the fixing stability of the drum can be improved and the drum can be easily disassembled. Second, the vibration is weakened by the shock absorption component. Chinese Patent CN 210419045 U has disclosed "a support mechanism for a casting hoist drum", which includes a base, a lifting device, a motor and a support mechanism. For this support mechanism for a casting hoist drum, first, the distance between the left lifting seat and the right lifting seat can be adjusted through the cooperation of a guide rail and a moving seat. Second, the installation height of the casting drum can be adjusted through the left and right lifting devices, which can adapt to casting drums of different lengths and diameters, and achieve better support, shock reduction and service life extension.

[0005] The research group has not found prior published literature on a hoisting device that can be used for the replacement of long-distance belts in large mines.

[0006] Therefore, it is particularly urgent and significant to seek a hoisting device for the replacement of long-distance belts in large mines. Summary of the Invention

[0007] The task of the present invention is to overcome the deficiencies of the prior art and provide a hoisting device for the replacement of long-distance belts in large mines, which can not only reduce the number of vulcanized joints of the long-distance belt, splice multiple belt rolls into the length of the belt roll required for the working belt before the belt replacement shutdown for maintenance, install the new belt and remove the old belt, but also greatly improve the belt replacement and installation efficiency and the operation safety performance.

[0008] The task of the present invention is completed through the following technical solutions:

[0009] A hoisting device for replacing long-distance belts in large mines. Aiming at the problems such as the inconvenience of replacing belts and vulcanizing belt joints, it includes a motor and a power support, a hoisting drum and a hoisting support, and a working frame. It also includes a frequency conversion motor with a frequency converter connected to a reducer with a drive sprocket. The reducer is placed on the motor and power support and is located on one side of the provided movable base as the power component. A non-drive end sprocket capable of connecting to the drive sprocket of the reducer and the hoisting drum are placed on a belt guide idler, a rotating part support, a motor platform and support, a support reinforcement beam, and a hoisting support, and are located in the middle of the provided movable base as the hoisting component. The movable base is placed on the horizontal ground, and the working frame is placed on the other side of the movable base. The hoisting power can be manually controlled by the frequency converter, transmitted to the non-drive end sprocket through the reducer and the drive sprocket of the reducer, thereby driving the hoisting drum. The belt guide idler can control the belt to be wound neatly and smoothly. The rotating part support, the support reinforcement beam, and the movable base make the overall structure stable and reliable. There is no need to grout and connect to the ground, eliminating the risk of tipping over. Only the self-weight of the equipment is needed to ensure the stability during use, with strong safety and reliability. It can bear belt rolls of more than one million tons, or be transferred for use during the maintenance of multiple belts in the mine. It can not only support the load of the hoisting drum and the new belt, prevent the belt from running off and scratching the new belt, but also realize the safe and efficient replacement of long-distance belts in large mines.

[0010] Innovative points of the present invention:

[0011] First, the drive is equipped with a frequency converter that can be manually controlled for speed. The speed can be adjusted according to the laying and running conditions of the belt. The frequency conversion drive enables the work plan for replacing and maintaining long-distance belts in large mines to be controlled, and the new belt can be rewound on the hoisting drum. Under the limitation of the belt guide idler, the laying of the new belt during the maintenance process is ensured to be smooth and convenient, avoiding the cross-cycle operation of hoisting - laying - vulcanizing, reducing labor intensity, improving maintenance efficiency, ensuring maintenance safety, being convenient, unobstructed, and fast in application, with low work labor intensity, and having broad promotion prospects.

[0012] Second, the frequency conversion motor drives the reducer, and then drives the hoisting drum through the drive sprocket of the reducer. It also includes a motor platform and support, a movable base, and a support reinforcement beam. Before the replacement and maintenance work of long-distance belts in large mines is carried out, the joints of multiple rolls of new belts can be vulcanized in advance and wound up at one time. During the maintenance work, only the laying of the new belt, vulcanizing one joint, and removing the old belt are required. The more long-distance belts need to be replaced, the higher the maintenance efficiency. It has strong driving ability, a stable and reliable structural foundation, can realize the one-time winding of large-load and long-distance belts, and greatly saves the time for maintaining long-distance belts.

[0013] Third, during the replacement and maintenance of long-distance belts in large mines, the old belts can be coiled onto the winch drum for subsequent recycling, avoiding the use of heavy engineering machinery for high-risk and low-efficiency operations in a small area and the accumulation of large amounts of waste belts on site. This greatly reduces the labor intensity of workers during maintenance, and the waste belts can also be converted into cash or reused. It has strong safety performance and full-process application functions for long-distance conveyor belts for mines.

[0014] Compared with the prior art, the present invention has the following advantages or effects:

[0015] Because the winch drive is equipped with a frequency converter, the speed can be manually controlled, and the long-distance belt replacement and maintenance work plan of large-scale mines is truly controlled. Therefore, the new belt is rewound on the winch drum, which can ensure that the new belt is laid in one go during the maintenance process and avoid the cross-cycle operation of lifting-laying-vulcanization, thereby reducing labor intensity and improving maintenance efficiency and safety. At the same time, because the winch is used before the long-distance belt replacement and maintenance work in large-scale mines, it can complete the vulcanization of multiple rolls of new belt joints and coil them at one time. During the maintenance period, it is only necessary to complete the laying of the new belt and vulcanization of one joint, and then take out the old belt. Therefore, the more belts need to be replaced, the higher the maintenance efficiency. The higher the rate, such as a large belt needs two new rolls of belts, which saves at least 50% of the maintenance time; three new rolls of belts are needed, which saves at least 67% of the maintenance time; four new rolls of belts are needed, which saves at least 75% of the maintenance time; five new rolls of belts are needed, which saves at least 80% of the maintenance time...; In addition, since the hoisting device is used in the replacement and maintenance of long-distance belts in large mines, the old belt is coiled on the hoisting drum for recycling, avoiding the use of heavy engineering machinery for high-risk and low-efficiency operations in a small area and the accumulation of a large number of waste belts on site, it can greatly reduce the labor intensity of workers during maintenance and realize the realization or reuse of waste belts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a winch device proposed for long-distance belt replacement in large mines.

[0017] Figure 2 is based on Figure 1 A schematic top view of the winch device is shown.

[0018] Figure 3 is based on Figure 1 Schematic diagram of the front view of the winch device shown.

[0019] Figure 4 is based on Figure 1 The left side view of the winch device is shown.

[0020] The symbols in the accompanying drawings represent:

[0021] 1. Variable-frequency motor 2. Reducer 3. Hoisting drum 4. Belt guide idler 5. Rotating component bracket 6. Reducer drive chain gear 7. Motor platform bracket 8. Bracket reinforcing beam 9. Non-drive end chain gear 10. Movable base

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings. Specific embodiments

[0023] As Figures 1 to 4 shown, a hoisting device for replacing long-distance belts in large mines includes a motor and a power bracket, a hoisting drum 3 and a hoisting bracket, and a working frame. It also includes a variable-frequency motor 1 equipped with a frequency converter, which is connected to a reducer 2 with a reducer drive chain gear 6 and placed on the motor and power bracket and on one side of the provided movable base 10 as a power component. The non-drive end chain gear 9 capable of connecting to the reducer drive chain gear 6 and the hoisting drum 3 are placed on the hoisting bracket provided with a belt guide idler 4, a rotating part bracket 5, a motor platform and bracket 7, and a bracket reinforcing beam 8 and located in the middle of the provided movable base 10 as a hoisting component; the movable base 10 is placed on the horizontal ground, and the working frame is placed on the other side of the movable base 10. The hoisting power can be manually controlled by the frequency converter and transmitted to the non-drive end chain gear 9 through the reducer 2 and the reducer drive chain gear 6, thereby driving the hoisting drum 3. The belt guide idler 4 can control the belt to be wound neatly and smoothly, and the rotating part bracket 5, the bracket reinforcing beam 8, and the movable base 10; the movable base 10 and the bracket reinforcing beam 8 make the overall structure stable and reliable, without the need for grouting connection with the ground, eliminating the risk of tipping over. Only the self-weight of the equipment is needed to ensure the stability during use, with strong safety and reliability performance. It can bear belt rolls above one million tons, or be transferred for use during the maintenance of multiple belts in the mine. It can not only support the hoisting drum 3 and the load of the new belt, prevent the belt from running off track and scratching the new belt, but also realize the safe and efficient replacement of long-distance belts in large mines.

[0024] The process of the present invention can further be:

[0025] The frequency converter of the variable-frequency motor 1 has a power of 11 - 18.5 KW, a rated current of 20 - 30 A, a control mode of vector control, and an outdoor protection level of IP54.

[0026] The motor power of the variable-frequency motor 1 is 10 - 15 KW.

[0027] The reducer 2 is a three-stage gear reducer, with an output torque of 1910 Nm - 2865 Nm and a reduction ratio of 29 - 45:1.

[0028] The hoisting drum 3 has a diameter of 300 - 500 mm and a length of 1200 - 1800 mm.

[0029] The material of the winding drum 3 is alloy steel 40Cr or 42CrMo.

[0030] The diameter of the belt guide idler 4 is 80 - 100 mm and the length is 400 - 800 mm.

[0031] The belt guide idler 4 is a stainless steel parallel idler.

[0032] The inner diameter of the support reinforcing beam 8 is 100 - 150 mm and the wall thickness of the beam is 20 - 26 mm.

[0033] The rotating component support 5, the motor platform support 7, the support reinforcing beam 8, and the movable base 10 are all made of Q345 low alloy high strength steel.

[0034] Embodiment 1

[0035] Before the maintenance work is carried out, place this winding device at the tail of the belt to be maintained. The winding drum 3 is placed parallel to the tail pulley drum of the belt to be maintained. Start the frequency conversion motor 1, and the power is transmitted from the reducer 2 to the non - driving end sprocket 9 through the reducer drive chain sprocket 6, thereby driving the winding drum 3. Slowly and smoothly wind the new belt reel around the winding drum 3. The belt guide idler 4 can control the belt to be wound neatly and smoothly. The rotating component support 5, the support reinforcing beam 8, and the movable base 10, which are long enough and strong enough, ensure that after the new belt joint is vulcanized in advance, all the belts are wound around the winding drum 3 to complete the maintenance work; when laying a new belt during the maintenance period, the new belt needs to be fixed to the old belt. At the same time, start the belt conveyor and the winding device at a low speed. The frequency conversion motor 1 can ensure synchronous operation with the belt conveyor until the new belt makes a full circle. During the maintenance period, only one new belt joint vulcanization work needs to be completed; after the vulcanization work is completed, take out the head of the old belt and wind it around the driving winding drum 3, and start the frequency conversion motor 1 and the belt conveyor synchronously to wind all the old belts around the winding drum 3, and the replacement and maintenance operation of the long - distance belt in large mines is completed.

[0036] Embodiment 2

[0037] For the replacement of a belt about 1600 meters long, it is necessary to vulcanize and connect 5 rolls of belts with a length of 330 meters each and a weight of about 25 to 30 tons per roll, which is the best single-roll belt weight suitable for mine shipment. A total of 6 joints are connected together. Five joints are pre-vulcanized and connected before the shutdown for maintenance to form a belt about 1600 meters long. The whole working process: Create the conditions for pre-vulcanized joints. Before maintenance, place the winch device of the present invention at the tail of the belt to be replaced. Among them, the winch drum 3 is placed parallel to the tail wheel drum of the belt to be replaced. Place a newly purchased 330-meter roll of belt on the temporary drum support, and this temporary rolling support should also be parallel to the winch drum 3, and this temporary support should be kept at a certain distance from this device for belt vulcanization. The outer head of the first roll of belt is wound around the winch drum 3, and the variable-frequency motor 1 is started. The reducer 2 is used as the power output, driving the reducer drive chain gear 6 to conduct to the non-driving end chain gear 9, so as to drive the winch drum 3 to slowly and smoothly wind the first roll of 330-meter new belt onto the winch drum 3. The outer head of the second roll of 330-meter belt and the outer head of the belt that has been wound around the winch drum 3 of the present invention device are vulcanized and connected. After vulcanization, by starting the variable-frequency motor 1, the reducer 2 is used as the power output, driving the reducer drive chain gear 6 to conduct to the non-driving end chain gear 9, so as to drive the winch drum 3 to slowly and smoothly wind the vulcanized second roll of 330-meter new belt onto the winch drum 3. A 660-meter-long belt is formed on the winch drum 3. This process is carried out in the same way. After 5 joints are vulcanized, the winch drum 3 is wound into a new belt roll with a maximum length of about 1600 meters. Connect the new belt to the belt conveyor: During the shutdown and maintenance process, for the 1600-meter new belt that has been wound, start the variable-frequency motor 1 to meet the requirements of different working conditions and ensure synchronous operation with the belt conveyor of the belt to be replaced until the new belt wraps around once. The reducer 2 is used as the power output, driving the reducer drive chain gear 6 to conduct to the non-driving end chain gear 9, so as to drive the winch drum 3 to slowly and smoothly wind the new belt onto the winch drum 3. The belt guide rollers 4 on both sides can control the neat and smooth winding of the belt. The long enough and strong rotating part support 5 and the support reinforcing beam 8 provide strong stability and strength guarantee for the overall winch device. The provided movable base 10 can ensure that after the new belt joints are pre-vulcanized, all the belts are wound onto the winch drum 3, which is convenient for the transfer of the winch device. After the vulcanization work is completed, take out the head of the old belt and wind it around the driving winch drum 3, and start the variable-frequency motor 1 and the belt conveyor machine synchronously to wind all the old belts onto the winch drum 3. The replacement and maintenance operation of the long-distance belt in large mines is completed.

[0038] As described above, the present invention can be preferably realized. The above embodiments are only the best implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention should all be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A winch device for replacing belts over long distances in large mines, which is used to solve the problems of inconvenience in replacing belts and vulcanizing belt joints. It includes a motor and a power support, a winch drum (3), a winch support, and a working frame. It is characterized in that It also includes a variable frequency motor (1) equipped with a frequency converter connected to a reducer (2) with a reducer drive sprocket (6) placed on the motor and a power bracket and located on one side of the movable base (10) as a power component, and a non-driving end sprocket (9) with a link to the reducer drive sprocket (6) and a hoisting drum (3) placed on a hoisting bracket equipped with a belt guide roller (4), a rotating part bracket (5), a motor platform and bracket (7), a bracket reinforcement beam (8) and located in the middle of the movable base (10) as a hoisting component; the movable base (10) is placed on a horizontal ground, and the working frame is placed on the other side of the movable base (10); the hoisting power can be manually controlled by the frequency converter, and the reducer (2) and the reducer are connected. The driving chain teeth (6) transmit power to the non-driving end chain teeth (9), thereby driving the hoisting drum (3). The belt guide roller (4) can control the belt to be wound neatly and smoothly. The rotating part bracket (5), the bracket reinforcement beam (8) and the movable base (10); the movable base (10) and the bracket reinforcement beam (8) make the overall structure stable and reliable, and do not need to be connected to the ground by grouting, eliminating the risk of rollover. Only the weight of the equipment is needed to ensure the stability of the use process. The safety and reliability are strong, and it can bear belt rolls of more than one million tons, or be transferred and used in the maintenance process of multiple belts in mines. It can support the hoisting drum (3) and the new belt load, prevent the belt from running off and scratching the new belt, and realize the safe and efficient replacement of long-distance belts in large mines.

2. The hoisting device according to claim 1 or 2, characterized in that The inverter power of the variable frequency motor (1) is 11-18.5 kW, the rated current is 20-30 A, the control mode is vector control, and the outdoor protection level is IP54.

3. The hoisting device according to claim 1 or 2, characterized in that The motor power of the variable frequency motor (1) is 10-15 kW.

4. The hoisting device according to claim 1 is characterized in that The reducer (2) is a three-stage gear reducer with an output torque of 1910Nm to 2865Nm and a reduction ratio of 29 to 45:

1.

5. The hoisting device according to claim 1, characterized in that The hoisting drum (3) has a diameter of 300 to 500 mm and a length of 1200 to 1800 mm.

6. The hoisting device according to claim 1 or 5, characterized in that The material of the hoisting drum (3) is alloy steel 40Cr or 42CrMo.

7. The hoisting device according to claim 1 is characterized in that The belt guide roller (4) has a diameter of 80 to 100 mm and a length of 400 to 800 mm.

8. The hoisting device according to claim 1 or 7, characterized in that The belt guide rollers (4) are stainless steel parallel rollers.

9. The hoisting device according to claim 1, characterized in that The inner diameter of the support reinforcement beam (8) is 100-150 mm, and the beam wall thickness is 20-26 mm.

10. The hoisting device according to claim 1, characterized in that The rotating component bracket (5), the motor platform bracket (7), the bracket reinforcement beam (8), and the movable base (10) are all made of Q345 low-alloy high-strength steel.

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