A fully mechanized coal mining face crossheading monorail train system and advancing method

Abstract

The present application relates to the technical field of coal mine underground transportation equipment, and particularly relates to a fully mechanized coal mining face crossheading single rail train system and advancing method, wherein the fully mechanized coal mining face crossheading single rail train system comprises a trailer, a train set and a pipe cable telescopic device connected in sequence, the tail of the pipe cable telescopic device is connected with a reversed loader, a track is laid under the train set, the train set travels along the track, the trailer is connected with the track through a cross connector and drags the track to advance; the advancing method comprises the steps of pulling and moving the track, pulling and moving the train set, advancing the working face and cyclically advancing. The present application realizes the rapid and continuous movement of the train through the long-distance alternate movement of the track and the train, without the need of frequently disassembling and laying tracks and the need of winch steel wire rope traction, can effectively reduce the labor intensity and operation time of workers and improve the safety of train operation.

Description

Technical Field

[0001] This invention relates to the field of underground transportation equipment technology in coal mines, and in particular to a monorail train system and method for paving the roadway in a fully mechanized mining face. Background Technology

[0002] Currently, in most coal mines in my country, the power supply, fluid supply, water treatment, and centralized control equipment for hydraulic supports, coal mining machines, and conveyors are all located within the longwall roadway and are loaded onto equipment trains that move with the advancing face. When the face advances to near the stop line, due to the length of the train, it is necessary to turn and move the receiving train to the main roadway so that the face can continue to advance and improve resource recovery rate.

[0003] Underground equipment trains are mainly divided into rail-mounted equipment trains and stepping equipment trains. Rail-mounted equipment trains require pre-laid tracks and are generally moved using winches and wire rope traction. This type of equipment train involves cumbersome movement procedures, requires a large number of workers, and necessitates frequent track dismantling and re-laying, resulting in low safety and high labor intensity for employees. Stepping equipment trains, on the other hand, move alternately between the track and the train body. They do not require pre-laid tracks or winch traction. A jacking mechanism is installed at the head of the equipment train, connecting it to the train body via jacks. Utilizing a stepping self-moving principle, train movement is controlled manually via control valves or a remote control, improving safety and convenience to some extent. However, this type of train operates discontinuously, resulting in slower speeds. Furthermore, the limitations of the tracks on both sides make turning difficult at the end of mining operations. Therefore, a new train system is urgently needed to solve the problems of frequent track dismantling and re-laying, high labor intensity, and difficulty in turning at the end of mining operations. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] Design a monorail train system for paving the roadway of a fully mechanized mining face. Along the direction of train travel, it includes trailers, train sets, and cable expansion joints connected in sequence. The tail of the cable expansion joint is connected to a transfer machine. A track is laid under the train set. The train set travels along the track. The trailers are connected to the track through cross connectors and pull the track forward.

[0006] The train set consists of a head car and several transport cars. The bodies of the head car and the transport cars, as well as the bodies of each transport car, are hinged together. Each transport car moves along the track under the traction of the head car. A guide slide is provided at the lower end of the chassis of each transport car, and the guide slide is slidably connected to the monorail.

[0007] The track is composed of multiple monorails connected together. Each monorail is mainly composed of a pin row, a toothed rail seat, and a base connected from top to bottom. Its bottom is in contact with the tunnel floor plate. Each base has bolt connection holes at both ends for connecting adjacent monorails. Multiple monorails are connected by bolts. The central axis of the pin row is set to coincide with the central axis of the track.

[0008] Preferably, a chain for connecting two adjacent vehicle bodies is provided.

[0009] Preferably, the head unit consists of a driver's cab, a power unit, a rack wheel, and guide shoes. The driver's cab is located at the front end of the head unit, and the power unit is located at the rear end of the driver's cab and is equipped with a control box, a frequency converter, a frequency converter motor, and a reducer. The rack wheel is located on the chassis between the driver's cab and the power unit and is connected to the output shaft of the reducer. The frequency converter is electrically connected to the frequency converter motor, and the frequency converter motor drives the rack wheel to rotate under the power supply of the frequency converter and the cooperation of the reducer.

[0010] The guide slipper is located at the lower end of the chassis and is correspondingly matched with the toothed wheel. The lower part of the guide slipper is slidably connected with the pin row. The teeth of the toothed wheel mesh with the teeth of the pin row so that the head car moves forward along the track under the rotation drive of the toothed wheel.

[0011] Preferably, a notch is provided at the upper end of the guide shoe, and the lower part of the toothed wheel is installed in the notch.

[0012] Preferably, the trailer, transport vehicle, and tractor unit all adopt a four-wheel structure with brakes at the bottom of their bodies.

[0013] Preferably, brake cylinders are provided at the four corners of the vehicle body.

[0014] A method for advancing a monorail train in the roadway of a fully mechanized mining face includes the following steps:

[0015] S1: Track Pulling: Retract the trailer's brake cylinder and control the trailer to pull the entire track forward 20-50 meters (the head car's rack and pinion wheels rotate in reverse). At this time, the trailer is 20-50 meters away from the head car of the train set, so that the tail of the track is aligned with the tail of the cable expansion device. The cable expansion device is in the retracted state. After reaching the position, extend the trailer's brake cylinder to assist the trailer in stopping and braking, and prevent the car from slipping.

[0016] S2: Pulling the train set: Retract the brake cylinder of the head car and control the train set to move forward along the track to the track trailer under the traction of the head car (the head car's gear wheel rotates in the forward direction). At the same time, pull open the cable expansion device. The tail of the track is still flush with the tail of the cable expansion device. After it is in place, extend the brake cylinder of the head car to assist the head car in stopping and braking to prevent the car from slipping.

[0017] S3: Working face advance: As the working face advances, the transfer machine moves forward and pushes the cable expansion device to gradually retract;

[0018] S4: Cyclic Forward Movement: After the cable telescopic device retracts to the head limit position, repeat step S1 to achieve cyclic forward movement of the train system.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. In this invention, the toothed wheel meshes with the pin row teeth, and the toothed wheel is driven to rotate by a variable frequency motor to propel the lead car to move forward on the track. During the forward movement, the bottom of the transport car is guided to slide on the track, making the transport car move more safely and stably. Furthermore, a guide shoe is provided on the lower part of the lead car chassis, and the guide shoe is slidably connected to the pin row. This guide shoe can be used to bear the weight of the train when it moves, avoiding the long-term reliance on the toothed wheel to walk on the pin row, which would increase the damage rate of the toothed wheel and cause the equipment to fail. As a result, the train moves more stably, safely and reliably.

[0021] 2. The train system of this invention achieves rapid and continuous movement of the train by alternating long-distance movement of the track and the train, without the need for frequent track dismantling and laying, or winch wire rope traction. This effectively reduces the labor intensity and working time of workers and improves the safety of train operation. At the same time, when approaching the end of mining, the laying of curved monorails can achieve turning function under the guidance of the track, which helps to make coal mining safe, efficient and convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a top view of the structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the overall structure of the trailer in this invention;

[0025] Figure 4 This is a schematic diagram of the structure in which the trailer and monorail are installed together in this invention;

[0026] Figure 5 This is a schematic diagram of the structure in which the transport vehicle and the monorail are installed together in this invention;

[0027] Figure 6 yes Figure 5 Enlarged structural diagram at point A in the diagram;

[0028] The numbers in the diagram are: 1 Trailer, 2 Head unit, 21 Gear wheel, 22 Cab, 23 Power unit, 24 Guide shoe, 3 Cross connector, 4 Transport vehicle, 41 Guide slide, 5 Cable expansion device, 6 Rail, 61 Base, 62 Gear seat, 63 Pin row, 64 Bolt connection hole, 7 Chain, 8 Brake cylinder. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Example 1

[0031] A monorail train system for paving the roadway in a fully mechanized mining face, such as Figures 1 to 6 As shown, along the direction of train travel, there are trailers 1, train sets, and cable expansion joints 5 connected in sequence. The tail of the cable expansion joint 5 is connected to the transfer machine. A track 6 is laid under the train set. The train set travels along the track 6. The trailers 1 are connected to the track 6 through cross connectors 3 and pull the track 6 forward. The cable expansion joint 5 is connected to the tail of the train set and is used to support and place cables and water pipes. When the train moves forward, the cable expansion joint 5 is opened. When the working face pushes the transfer machine forward, the cable expansion joint 5 is contracted. The cables and water pipes expand and contract together with the cable expansion joint 5, which can effectively reduce the frequency of train set movement. The number of expansion joints can be increased or decreased as needed.

[0032] The train set consists of a head car 2 and several transport cars 4. The car bodies of the head car 2 and the transport cars 4, as well as the car bodies of each transport car 4, are hinged together by cross connectors 3. Each transport car 4 moves along the track 6 under the traction of the head car 2. A chain 7 is provided between two adjacent car bodies to connect the car bodies.

[0033] The bottom of the trailer 1, transport vehicle 4, and head vehicle 2 all adopt a four-wheel structure with brakes.

[0034] Furthermore, brake cylinders 8 are installed at the four corners of the vehicle body to assist braking and prevent the vehicle from rolling away when parked.

[0035] The head car 2 consists of a driver's cab, a power unit 23, a rack wheel 21, and a guide shoe 24. The driver's cab 22 is located at the front end of the head car 2 and is equipped with an operating console and a display panel for controlling the forward movement of the train. The power unit 23 is located at the rear end of the driver's cab 22 and is equipped with a control box, a frequency converter, a frequency converter motor, and a reducer. The rack wheel 21 is located on the chassis between the driver's cab 22 and the power unit 23 and is connected to the output shaft of the reducer. The reducer has a speed ratio of 60 and serves to increase torque and control output speed. The frequency converter is electrically connected to the frequency converter motor, and the frequency converter motor drives the rack wheel 21 to rotate under the power supply of the frequency converter and the cooperation of the reducer, so that the rack wheel 21 can switch between forward rotation, reverse rotation, and locked working states.

[0036] The guide shoe 24 is located at the lower end of the chassis and is correspondingly matched with the toothed wheel 21. The lower part of the guide shoe 24 is slidably connected with the pin row 63. The teeth of the toothed wheel 21 mesh with the teeth of the pin row 63 so that the head car 2 moves forward along the track 6 under the rotation drive of the toothed wheel 21.

[0037] A notch is provided at the upper end of the guide shoe 24, and the lower part of the toothed wheel 21 is installed in the notch.

[0038] Track 6 is composed of multiple interconnected monorails. Each monorail mainly consists of a pin row 63, a toothed rail seat 62, and a base 61 connected sequentially from top to bottom. Its bottom contacts the tunnel floor, providing stable support. Specifically, the toothed rail seat 62 is welded to the upper surface of the base 61, and the pin row 63 is mounted on the upper end of the toothed rail seat 62 via pins. Each base 61 has bolt holes 64 at both ends for connecting adjacent monorails, and the multiple monorails are connected by bolts. The central axis of the pin row 63 coincides with the central axis of track 6. Track 6 can be added to or removed according to actual needs.

[0039] A guide slide 41 is provided at the lower end of the chassis of the transport vehicle 4, and the guide slide 41 is slidably connected with the monorail to achieve a sliding connection between the transport vehicle 4 and the track 6.

[0040] In the above scheme, the length of the train set and track 6 can be adjusted according to the actual situation. Specifically, it can be achieved by increasing or decreasing the number of transport cars 4 and monorails, with a maximum length of 200-300m.

[0041] A method for advancing a monorail train in the roadway of a fully mechanized mining face includes the following steps:

[0042] S1: Pulling track 6: Retract the brake cylinder 8 of trailer 1, control trailer 1 to pull the entire track 6 forward 20-50 meters (head car gear wheel 21 reverses engagement), at this time trailer 1 is 20-50 meters away from the head car 2 of the train set, so that the tail of track 6 is flush with the tail of cable expansion device 5, cable expansion device 5 is in the retracted state, after reaching the position, the brake cylinder 8 of trailer 1 extends to assist trailer 1 in stopping and braking, and prevent the car from slipping;

[0043] S2: Pulling the train set: Retract the brake cylinder 8 of the head car 2, and control the train set to move forward along the track 6 to the track 6 trailer 1 under the traction of the head car 2 (the head car toothed wheel 21 rotates forward). At the same time, pull open the cable expansion device 5. The tail of the track 6 is still flush with the tail of the cable expansion device 5. After it is in place, extend the brake cylinder 8 of the head car 2 to assist the head car 2 in stopping and braking to prevent the car from slipping.

[0044] S3: Working face advance: As the working face advances, the transfer machine moves forward and pushes the cable expansion device 5 to gradually retract;

[0045] S4: Cyclic Forward Movement: After the cable telescopic device 5 retracts to the head limit position, step S1 is repeated to achieve cyclic forward movement of the train system.

[0046] In the above steps, the train system can move rapidly and continuously by alternating long distances between track 6 and the train set. During this process, there is no need for frequent track dismantling and laying, and no need for winch wire rope traction, which can effectively reduce the labor intensity and working time of workers.

[0047] The monorail train system in this invention is mainly used in roadway surface hardening conditions. When the working face advances to near the end of mining and the train needs to turn, a curved rail with a certain arc can be laid in front of track 6. The train group moves along the curved rail under the traction of the lead car to achieve the turn.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A monorail train system for paving the roadway in a fully mechanized mining face, characterized in that, Along the direction of train travel are a trailer (1), a train set, and a cable expansion device (5) connected in sequence. The tail of the cable expansion device (5) is connected to a transfer machine. A track (6) is laid under the train set. The train set travels along the track (6). The trailer (1) is connected to the track (6) through a cross connector (3) and pulls the track (6) forward. The train set consists of a head car (2) and several transport cars (4). The car body of the head car (2) and the car body of the transport cars (4) are hinged together, and the car bodies of each transport car (4) are connected to each other. Each transport car (4) moves along the track (6) under the traction of the head car (2). A guide slide (41) is provided at the lower end of the chassis of the transport car (4). The guide slide (41) is slidably connected to the monorail. The track (6) is composed of multiple monorails connected together. Each monorail is mainly composed of a pin row (63), a toothed rail seat (62), and a base (61) connected from top to bottom. Its bottom is in contact with the tunnel floor plate. Each base (61) has bolt connection holes (64) at both ends for connecting adjacent monorails. Multiple monorails are connected by bolts. The central axis of the pin row (63) coincides with the central axis of the track (6).

2. The monorail train system for hauling the longwall mining face as described in claim 1, characterized in that: A chain (7) is provided between two adjacent car bodies to connect the auxiliary car bodies.

3. The monorail train system for hauling the longwall mining face as described in claim 1 or 2, characterized in that: The head car (2) consists of a driver's cab, a power unit (23), a geared wheel (21), and a guide shoe (24). The driver's cab (22) is located at the front end of the head car (2). The power unit (23) is located at the rear end of the driver's cab (22) and is equipped with a control box, a frequency converter, a frequency converter motor, and a reducer. The geared wheel (21) is located on the chassis between the driver's cab (22) and the power unit (23) and is connected to the output shaft of the reducer. The frequency converter is electrically connected to the frequency converter motor, and the frequency converter motor drives the geared wheel (21) to rotate under the power supply of the frequency converter and the cooperation of the reducer. The guide shoe (24) is located at the lower end of the chassis and is correspondingly matched with the toothed wheel (21). The lower part of the guide shoe (24) is slidably connected with the pin row (63). The teeth of the toothed wheel (21) mesh with the teeth of the pin row (63) so that the head car (2) moves forward along the track (6) under the rotation drive of the toothed wheel (21).

4. The monorail train system for hauling the longwall mining face as described in claim 3, characterized in that: A notch is provided at the upper end of the guide shoe (24), and the lower part of the toothed wheel (21) is installed in the notch.

5. The monorail train system for hauling the longwall mining face as described in claim 1, characterized in that: The trailer (1), transport vehicle (4), and tractor unit (2) all adopt a four-wheel structure with brakes at the bottom of their bodies.

6. The monorail train system for hauling the longwall mining face as described in claim 5, characterized in that: Brake cylinders (8) are provided at the four corners of the vehicle body.

7. A method for advancing a monorail train along the roadway of a fully mechanized mining face, characterized in that, Includes the following steps: S1: Pulling the track (6): Retract the brake cylinder (8) of the trailer (1) and control the trailer (1) to pull the entire track (6) forward 20-50 meters. At this time, the toothed wheel (21) of the head car (2) reverses its engagement, and the trailer (1) is 20-50 meters away from the head car (2) of the train set, so that the tail of the track (6) is flush with the tail of the cable expansion device (5). The cable expansion device (5) is in the retracted state. After it is in place, the brake cylinder (8) of the trailer (1) extends to assist the trailer (1) in stopping and braking to prevent the car from slipping. S2: Pulling the train set: Retract the brake cylinder (8) of the head car (2) and control the train set to move forward along the track (6) to the trailer (1) of the track (6) under the traction of the head car (2). At this time, the toothed wheel (21) of the head car rotates in the forward direction and at the same time pulls open the cable expansion device (5). The tail of the track (6) is still flush with the tail of the cable expansion device (5). After it is in place, the brake cylinder (8) of the head car (2) extends to assist the head car (2) in stopping and braking to prevent the car from slipping. S3: Working face advance: As the working face advances, the transfer machine moves forward and pushes the cable expansion device (5) to gradually retract; S4: Cyclic Forward Movement: After the cable telescopic device (5) retracts to the head limit position, step S1 is repeated to realize the cyclic forward movement of the train system.

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