One-button type unblocking device for underground coal bunker and using method of one-button type unblocking device

Abstract

The invention discloses a one-button type unblocking device for an underground coal bunker and a using method of the one-button type unblocking device, belongs to the technical field of coal mine safety, can solve the problem that potential safety hazards exist in an existing manual unblocking mode, and comprises a first mining hinge machine, a first fixed pulley, a second mining hinge machine, a second fixed pulley, a steel wire rope and a cutting chain located in the coal bunker. The first mining hinge machine and the first fixed pulley are located at a bunker inlet of the coal bunker, the second mining hinge machine and the second fixed pulley are located at a bunker outlet of the coal bunker, the steel wire rope penetrates through the coal bunker, and the two ends of the steel wire rope penetrate through the first fixed pulley and the second fixed pulley respectively and then are connected with the first mining hinge machine and the second mining hinge machine. One end of each layer of cutting chain is connected with the steel wire rope through a steel wire rope clamp, the other end of each layer of cutting chain is connected with a mining anchor rod located on the outer side wall of the coal bunker, and the first mining hinge machine and the second mining hinge machine are electrically connected with a control device. One-button type operation of coal bunker unblocking can be achieved, only starting and stopping buttons need to be pressed down, and operation is easy.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine safety, and in particular relates to an underground coal bunker one-button clearing device and a use method thereof. Background Art

[0002] As a key storage and regulation facility in coal mine production, underground coal bunkers play a vital role in ensuring continuous production of mines, improving efficiency, stabilizing coal quality, reducing pollution and improving safety.

[0003] When coal is stored in a coal bunker, the large pieces of coal and gangue are squeezed against each other at the bottom of the bunker or the coal storage volume is piled up for a long time, which can easily cause "blockage" phenomenon; the coal mud formed by the mixture of coal and water adheres to the bunker wall, resulting in "bulging eyes". In order to clear the blockage, personnel need to clear the blockage above or below the coal seam. Due to the sudden clearing of the coal seam, it is very easy to cause personnel to fall, fall or be hit.

[0004] In order to prevent similar accidents from happening and protect the safety of personnel and equipment, a coal bunker blockage clearing device is urgently needed to solve the dangers brought by personnel blockage clearing, realize the automation of coal bunker blockage clearing, and improve work efficiency. Summary of the invention

[0005] In order to solve the problem of potential safety hazards in existing manual blockage clearing methods, the present invention provides a one-button blockage clearing device for an underground coal bunker and a method for using the same. The device lifts up a cutting chain, which lifts up the blocked coal to make it fluffy and cut and decompose it, and pulls down the chain to cut and push the coal downward. The middle rope also performs reciprocating motion to loosen the surrounding coal until the blocked coal is loosened and smoothly moves downward out of the bunker, thereby avoiding accidents such as falling, being hit or being crushed when people are clearing the blockage directly.

[0006] The present invention adopts the following technical solution: A one-button clearing device for an underground coal bunker comprises a mining hinge machine 1, a fixed pulley 1, a mining hinge machine 2, a fixed pulley 2, a steel wire rope and a cutting chain located in the coal bunker, the mining hinge machine 1 and the fixed pulley 1 are located at the bunker entrance of the coal bunker, the mining hinge machine 2 and the fixed pulley 2 are located at the bunker exit of the coal bunker, the steel wire rope passes through the coal bunker, and the two ends of the steel wire rope respectively pass through the fixed pulley 1 and the fixed pulley 2 and are connected to the mining hinge machine 1 and the mining hinge machine 2, the cutting chain is provided with several layers from top to bottom, one end of the cutting chain of each layer is connected to the steel wire rope through a steel wire rope clamp, and the other end is connected to the mining anchor rod located on the outer wall of the coal bunker, and the mining hinge machine 1 and the mining hinge machine 2 are respectively electrically connected to a control device.

[0007] Furthermore, the fixed pulley 1 and the fixed pulley 2 are respectively located directly above the coal bunker entrance and directly below the coal bunker exit.

[0008] Furthermore, the number of cutting chains is four layers, and each layer of cutting chains is composed of 8 iron chains with a horizontal angle of 45°.

[0009] Furthermore, the number of the mining anchors is four layers, and the number of mining anchors in each layer is 8.

[0010] Furthermore, the control device includes a control console and a double-control switch, the output end of the double-control switch is connected to the input end of the control console, and the output end of the control console is respectively connected to the mine hinge machine 1 and the mine hinge machine 2 through mining wires.

[0011] A method for using an underground coal bunker one-button clearing device comprises the following steps: S1. When the coal bunker is blocked, the clearing driver checks the clearing device to ensure that the machinery and power supply are normal, and then presses the start switch on the console; S2. The control console starts the mine hinge machine 1 above the coal bunker. The mine hinge machine 1 works at an average slow speed of 0.15m / s for 66s, so that the mine hinge machine 1 is tightened in the positive direction to pull up the wire rope and drive 32 cutting chains upward. When it reaches the limiter on the mine hinge machine 1, a reverse electrical signal is transmitted to the mine hinge machine 1 through the circuit, and at the same time, a pull-down electrical signal is transmitted to the mine hinge machine 2 below the coal bunker, so that the mine hinge machine 2 pulls the wire rope downward; S3, the second mining hinge machine works at an average slow speed of 0.15m / s for 66 seconds, so that the second mining hinge machine is tightened in the positive direction and pulls the wire rope downward to drive 32 cutting chains downward. When it reaches the limiter on the second mining hinge machine, a reverse electrical signal is transmitted to the second mining hinge machine through the circuit, and at the same time, an upward electrical signal is transmitted to the first mining hinge machine, so that the first mining hinge machine above the coal bunker pulls the wire rope upward, and this is repeated until the blockage is cleared; S4. After the blockage is cleared, the blocked coal seam flows down smoothly. When the cutting chain moves down to the limiter, the clearing driver presses the stop switch on the console and all devices stop running.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention can realize one-touch operation of coal bunker blockage clearing. It only needs to press the start and stop buttons, which is easy to operate; 2. The mining hinge machine cuts the blocked coal by lifting and pulling down 32 cutting chains, with high efficiency, high power and strong clearing ability; 3. The control console can effectively control the tightening of the mining hinge machine, loosen the direction of the wire rope, and perform upward and downward cutting and clearing, and repeat this process until the coal bunker is cleared, with a high degree of automation; 4. The cutting chain can effectively cut the blocked coal seam, the twist chain can increase the friction area between the cutting chain and the coal seam, with high strength, low cost, easy maintenance and replacement, high reliability of the wire rope, low cost, and the wire rope clamp can effectively fix the wire rope and the twist chain, with high reliability and low cost; 5. The mining anchor effectively fixes the cutting chain, and the fixed pulley can change the direction of the force, which is beneficial to the layout of the underground space and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the blockage clearing device of the present invention when it is not working; Figure 2 It is a schematic diagram of the blockage clearing device of the present invention in the pulled-up state; Figure 3 It is a schematic diagram of the blockage clearing device of the present invention in the pulled-down state; Figure 4 It is a schematic diagram of the arrangement of the cutting chain of the present invention; Figure 5 It is a plan view of the blockage clearing device of the present invention; Figure 6 It is a schematic diagram of the connection between the wire rope clamp and the cutting chain of the present invention; Figure 7 It is a schematic diagram of the connection between the cutting chain and the mining anchor of the present invention; Figure 8 It is a structural schematic diagram of a wire rope clamp; Fig. 9 It is a schematic diagram of the structure of a mining anchor; Among them: 1-mine hinge machine one; 2-mine hinge machine two; 3-fixed pulley one; 4-fixed pulley two; 5-wire rope; 6-wire rope clamp; 7-cutting chain; 8-mine anchor rod; 9-coal bunker; 10-control console; 11-double control switch; 12-mine wire. DETAILED DESCRIPTION

[0014] The present invention will be further described with reference to the accompanying drawings.

[0015] As shown in the figure, an underground coal bunker blockage clearing device includes a power device, a control device, a cutting device, and a fixing device; The power device includes a mining hinge machine 1 and a mining hinge machine 2, which are respectively placed at the entrance and exit of the coal bunker. The power of the selected mining hinge machine meets the power requirements, and the mining hinge machine can realize forward tightening and reverse loosening.

[0016] The first and second mining hinge machines are both JSDB-30 dual-speed multi-purpose vehicles, with an outer layer fast speed of 40KN and a slow speed of 300KN, an inner layer fast speed of 82KN and a slow speed of 470KN, an average fast speed of 61KN and a slow speed of 380KN. The wire rope speed is 1.5m / s at the outer layer fast speed and 0.2m / s at the slow speed; the average fast speed is 1.1m / s and the slow speed is 0.15m / s, which can realize forward and reverse rotation and meet the power required by the cutting device to cut the blocked coal seam.

[0017] The control device includes a control console 10, a double-control switch 11, and a mining wire 12. The double-control switch 11 transmits signals through the control console 10 to start, pause and shut down the mining hinge machine, thereby realizing forward tightening and reverse loosening of the mining hinge machine.

[0018] Furthermore, the double-control switch 11 is a KBZ2-200 mining explosion-proof dual-way combined feeder switch, which can control two devices and two power supplies at the same time to achieve automatic or manual switching. The control console 10 is a KXB-24 (A) mining intrinsically safe programmable control box (PLC control box), which is used to control various signals and data underground. The mining wires are used to transmit signals from the control box to start, pause and shut down the mining hinge machine.

[0019] The cutting device comprises a steel wire rope 5, a steel wire rope clamp 6, and a cutting chain 7. There are four layers of cutting chains 7 in the coal bunker, each layer of cutting chains is composed of 8 iron chains with a horizontal angle of 45 degrees, and the cutting chain 7 is in a relaxed state during non-working period. The iron chain is connected to the steel wire rope 5 through the steel wire rope clamp 6, and the two ends of the steel wire rope 5 are connected to the mining hinge machine 1 and the mining hinge machine 2.

[0020] Further, the cutting chain 7 is composed of a G80 manganese steel twisted chain with a length of 6m, a specification of 13×39mm, a minimum inner width of 15.6mm, a maximum outer width of 44.5mm, a unit length weight of 3.7Kg / m, and a minimum breaking load of 212KN, which meets the load required for actual work. The coal bunker feed port elevation is 0m, the mine anchor position elevations are -2m, -7m, -12m, and -17m, the wire rope specification is a 6×37mm structural wire rope with a diameter of φ34mm, the shortest length is 50m, the weight per 100 meters is 511Kg, the wire rope is located in the center of the coal bunker, and the minimum breaking tension is 811KN, which meets the actual work needs. The wire rope clamp 6 is an M12×1 bolt with a bolt diameter of 10.9mm and a test load of 56.5KN.

[0021] The fixing device includes a mining anchor 8, a fixed pulley 1 3, and a fixed pulley 2 4. There are four layers of mining anchors 8 in the coal bunker, and each layer has 8 mining anchors, which are respectively connected to the cutting chain 7. The fixed pulley 1 3 and the fixed pulley 2 4 are located at the feed port and the discharge port of the coal bunker 9 to change the direction of the wire rope 5.

[0022] Furthermore, the mining anchor 8 is a MGSL18 model mining fiberglass anchor with an anchoring force of 60KN, which can meet the tension required by the cutting layer. The fixed pulley 1 3 and the fixed pulley 2 4 are made of QT400-18 ductile iron. The fixed pulley 1 3 and the fixed pulley 2 4 are located directly above and below the center of the coal bunker feed port, with elevations of +1.5m and -21.5m, respectively, to change the direction of the force of the wire rope 5.

[0023] The present invention also provides a method and principle for using the above-mentioned one-button unclogging device for underground coal bunker, which includes the following steps: (1) When the coal bunker 9 is blocked, the clearing driver checks the clearing device to ensure that the machinery and power supply are normal, and then presses the start switch on the console 10; (2) The control console 10 starts the mine hinge machine 1 above the coal bunker through the circuit. The mine hinge machine 1 above the coal bunker works at an average slow speed of 0.15m / s for 66s, so that the mine hinge machine 1 is tightened and pulled up to drive the 32 cutting chains 7 upward. When it reaches the limiter of the mine hinge machine 1, a reverse electrical signal is transmitted to the mine hinge machine 1 above the coal bunker through the circuit, and at the same time, a downward electrical signal is transmitted to the mine hinge machine 2 below the coal bunker, so that the mine hinge machine 2 below the coal bunker pulls the wire rope downward (this paragraph is described upward); (3) The second mine hinge machine below the coal bunker works at an average slow speed of 0.15m / s for 66 seconds, so that the second mine hinge machine is tightened in the positive direction and pulls the steel wire rope 5 downward to drive the 32 cutting chains downward. When it reaches the limiter on the second mine hinge machine 2, a reverse electrical signal is transmitted to the second mine hinge machine below the coal bunker through the circuit, and at the same time, an upward electrical signal is transmitted to the first mine hinge machine above the coal bunker, so that the first mine hinge machine above the coal bunker pulls the steel wire rope 5 upward, and this is repeated until the blockage is cleared (this section describes the downward direction, and the speed and time of the upper and lower parts are the same and easy to control); (4) After the blockage is cleared, the blocked coal seam flows down smoothly. When the cutting chain 7 moves down to the limiter, the clearing driver presses the stop switch on the console 10. All devices stop running.

[0024] Example 1 like Figure 1 As shown, the specifications of the coal bunker 9 are 20m high, 4m in diameter, and 5m in thickness of the blocked coal seam.

[0025] 1. Calculation formula for cutting friction of cutting chain 7: F 摩 =πr 2 hρgk0, where: π-3.14; r-coal bunker radius; h-blocking coal seam thickness; ρ coal density, 1.5g / cm 3 ; k0-cutting coefficient (k0=V1 / V2); V1-the volume of coal carried by the cutting chain; V2-the volume of the blocked coal; From the above formula, the tensile force on each layer of the cutting chain is F摩 =261.25KN.

[0026] The formula for calculating the tension on each chain is: f1=1 / 8F 摩 ; According to the above formula, the tension on each chain is 32.7KN, and the safety factor is 3 times. The specifications of the selected chains are shown in Table 1.

[0027] Table 1 Chain specifications 2. The calculation formula for wire rope is as follows: F 绳 =F 磨 +G 切 ; Where: G 切 -The weight of the cutting chain, from the above formula, F rope is 268.21KN, take 3 times the safety factor, then the design load is 804.63KN, the selected wire rope specifications are shown in Table 2.

[0028] Table 2 Wire rope specifications 3. Selection of mining hinge machines The calculation formula of the tension on the mining hinge machine is as follows: F 铰 =F 绳 +G 绳 ; Where: G 绳 -The gravity of the steel wire rope in the coal bunker, according to the above formula, the load borne by the mining hinge machine is 269KN, and the mining hinge machine is selected as JSDB-30 double-speed multi-purpose vehicle.

[0029] 4. Selection of anchor rods The calculation formula of the tension on the anchor rod is as follows: F 锚 =1 / 2f1; From the above formula, the tension on the mining anchor is 16.35KN. Taking 3 times the safety factor, the load on the mining anchor is 49.05KN. The anchor is MGSL18 mining glass anchor, and the experimental anchoring force is 60KN.

[0030] 5. Wire rope clamp selection The calculation formula of the force on the wire rope clamp is as follows: F 卡 =1 / 2F 摩 ; From the above formula, the load on the wire rope clamp is 16.35KN. Taking 3 times the safety factor, the load on the wire rope clamp is 49.05KN. The specifications of the wire rope clamp are shown in Table 3.

[0031] Table 3 Wire rope clamp specifications Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A one-button blockage clearing device for underground coal bunker, characterized by: The invention comprises a mining hinge machine (1), a fixed pulley (3), a mining hinge machine (2), a fixed pulley (4), a steel wire rope (5), and a cutting chain (7) located in a coal bunker (9). The mining hinge machine (1) and the fixed pulley (3) are located at an entrance of the coal bunker (9), the mining hinge machine (2) and the fixed pulley (4) are located at an exit of the coal bunker (9), the steel wire rope (5) passes through the coal bunker (9), and both ends of the steel wire rope (5) pass through The fixed pulley 1 (3) and the fixed pulley 2 (4) are connected to the mining hinge machine 1 (1) and the mining hinge machine 2 (2) at the back. The cutting chain (7) is provided with a plurality of layers from top to bottom. One end of the cutting chain (7) of each layer is connected to the steel wire rope (5) through the steel wire rope clamp (6), and the other end is connected to the mining anchor rod (8) located on the outer wall of the coal bunker (9). The mining hinge machine 1 (1) and the mining hinge machine 2 (2) are respectively electrically connected to a control device.

2. The one-button blockage clearing device for underground coal bunker according to claim 1 is characterized in that: The fixed pulley 1 (3) and the fixed pulley 2 (4) are respectively located directly above the coal bunker entrance and directly below the coal bunker exit of the coal bunker (9).

3. The one-button blockage clearing device for underground coal bunker according to claim 1 is characterized in that: The number of cutting chains (7) is four layers, and each layer of cutting chains (7) is composed of 8 iron chains with a horizontal angle of 45°.

4. The one-button blockage clearing device for underground coal bunker according to claim 1 is characterized in that: The number of the mining anchor rods (8) is four layers, and the number of the mining anchor rods (8) in each layer is eight.

5. The one-button blockage clearing device for underground coal bunker according to claim 1 is characterized in that: The control device comprises a control console (10) and a double-control switch (12), wherein the output end of the double-control switch (12) is connected to the input end of the control console (10), and the output end of the control console (10) is respectively connected to a first mining hinge machine (1) and a second mining hinge machine (2) via a mining wire (12).

6. A method for using the one-button blockage clearing device for underground coal bunker according to claim 1, characterized in that: The steps include: S1. When the coal bunker (9) is blocked, the clearing driver checks the clearing device to ensure that the machinery and power supply are normal, and then presses the start switch on the control console (10); S2, the control console (10) starts the mining hinge machine (1) above the coal bunker. The mining hinge machine (1) works at an average slow speed of 0.15 m / s for 66 seconds, so that the mining hinge machine (1) is tightened in the positive direction to pull up the steel wire rope (5) and drive the 32 cutting chains (7) upward. When the limiter on the mining hinge machine (1) is reached, a reverse electrical signal is transmitted to the mining hinge machine (1) through the circuit, and a downward electrical signal is transmitted to the mining hinge machine (2) below the coal bunker, so that the mining hinge machine (2) pulls the steel wire rope (5) downward; S3, the second mining hinge machine (2) operates at an average slow speed of 0.15 m / s for 66 seconds, so that the second mining hinge machine (2) is tightened in the positive direction and pulls the steel wire rope (5) downward to drive the 32 cutting chains (7) downward. When the limiter on the second mining hinge machine (2) is reached, a reverse electrical signal is transmitted to the second mining hinge machine (2) through the circuit, and at the same time, an upward electrical signal is transmitted to the first mining hinge machine (1), so that the first mining hinge machine (1) above the coal bunker (9) pulls the steel wire rope (5) upward, and this is repeated until the blockage is cleared; S4. After the blockage is cleared, the blocked coal seam flows down smoothly. When the cutting chain (7) moves down to the limiter, the clearing driver presses the stop switch on the control console (10), and all devices stop running.

Images