Coal mine inclined shaft hoist steel wire rope slack rope protection device
By linking a column-type structure with an inductive sensor, the looseness of the wire rope is monitored in real time, solving the problem of tangling and confusion caused by excessively loose wire ropes in coal mine inclined shaft hoisting winches, thus improving operational efficiency and safety.
Patent Information
- Application Number
- CN202521918031.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-08
AI Technical Summary
In existing coal mine inclined shaft hoisting winches, the wire rope is prone to becoming too loose during rope slack operation, leading to tangling and misalignment, which poses a safety risk and results in low operating efficiency.
It adopts a column-type structure, combined with inductive sensors and limiters. Through the cooperation of linkage sensing blocks and stop rods, it monitors the slack status of the wire rope in real time to prevent it from becoming too loose. It also includes pulley blocks and directional pulleys to reduce friction. The sensors are linked with the control system to send electrical signals to control the winch to stop.
It improves the efficiency of rope slack operation, prevents wire rope tangling and misalignment, enhances safety, has strong applicability, reduces mechanical damage, and improves equipment reliability.
Smart Images
Figure CN224677692U_ABST
Abstract
Description
Technical Field
[0001] This utility model is a slack rope protection device for a hoisting winch in a coal mine inclined shaft, belonging to the field of coal mine electromechanical integration control technology. Background Technology
[0002] Mine inclined shaft hoisting winches (windlass machines) are key pieces of equipment used in coal mines to transport materials and equipment along slopes or vertical shafts. They achieve efficient transportation by pulling mine cars or skips using wire ropes. Loosening the rope is a necessary step in the winch's operation. When the winch lowers the mine car into the underground horizontal roadway, it is necessary to loosen the rope to allow underground operators to easily disconnect the connecting pin between the hopper trolley and the wire rope. Similarly, when the winch lifts the hopper trolley to the surface, it is necessary to loosen the rope and disconnect the connecting pin. According to safety requirements, the winch rope loosening operation must prevent the wire rope from becoming too loose. Loosening can cause the wire rope on the winding drum to become disordered, resulting in increased localized compression and friction, leading to wire breakage, deformation, and reduced tensile strength. In multi-layered winding, the upper layer of wire rope may become embedded in the gaps of the lower layer, causing a sudden impact breakage and other safety risks. Utility Model Content
[0003] This utility model proposes a slack protection device for the wire rope of a coal mine inclined shaft hoisting winch, the purpose of which is to prevent the wire rope from becoming too loose and causing it to become tangled and disordered.
[0004] The technical solution of this utility model: A wire rope slack protection device for a coal mine inclined shaft hoisting winch, the structure of which includes two columns 1, an inductive sensor 2, a sensor mounting bracket 3, a limiter 4, a linkage sensing block 5, a rope 6, a pulley block 7, a reversing wheel 8, and a stop rod 9; the columns 1 are located on both sides of the winch outlet, the installation position is set according to the width of the winch rope winding pulley, and the height of the columns is set according to the rope exit height; the pulley block 7 for winding the rope 6 is installed on the top of the two columns 1, and a reversing wheel 8 for changing the winding direction of the rope 6 is installed on the upper inner side of the columns 1; the limiter 4 is installed on the outside of the columns 1, and the linkage sensing block 5 is movably placed inside the limiter 4; the linkage sensing block is located on the rope... The cable can move up and down within the limiter under traction; both ends of the cable are connected to the upper part of the linkage sensing block and pass around the pulley blocks 7 and the directional pulleys 8 on both sides. The stop rod 9 is fixed on the cable between the two columns 1 to reduce the wear of the wire rope on the cable; the limiter 4 has a hole at the bottom, and the inductive sensor 2 is installed at the bottom of the limiter 4 through the sensor mounting bracket 3. The inductive sensor 2 senses the action through the hole in the limiter and the linkage sensing block 5 and sends an electrical signal to the control system, indicating that the wire rope has not reached its limit of looseness. When the sensor leaves the limiter and exceeds the sensing distance of the intrinsically safe inductive sensor for mining, the sensor sends an electrical signal to prevent the cable from loosening further.
[0005] The shape of the linkage sensing block is similar to the contour of the limiter cavity, but the contour is smaller than that of the limiter.
[0006] The limit switch guides the up-and-down movement of the linkage sensor, allowing the linkage sensor to move along a certain trajectory.
[0007] The weight of the linkage sensing block is 50-150N greater than the sum of 1.5 times the weight of the rope, the weight of the stop rod, and the friction force of the device.
[0008] The pulley block 7 and the deflector 8 are U-shaped wheels with bearings to reduce the resistance during the rope lifting process.
[0009] There are two inductive sensors, which are respectively installed on the two side columns. Both inductive sensors are linked to the linkage sensor, and either action can play a role in slack rope protection.
[0010] When no external force is applied, the linkage sensing block automatically returns to its initial position under the action of the limiter, without the need for manual intervention.
[0011] The sensor mounting bracket 3 and the limiter 4 are adjustable and can be mounted on the column 1 at an adjustable height.
[0012] The column can be moved and installed.
[0013] The inductive sensor is an intrinsically safe sensor for mining applications.
[0014] The beneficial effects of this utility model are: 1) On the one hand, it can improve the efficiency of operators in slack rope operation. On the other hand, it can effectively prevent the wire rope from becoming too loose and causing it to become tangled and messy.
[0015] 2) This application is designed for column-mounted installation, which can be installed in various occasions, improves the practicality of installation, and reduces terrain limitations.
[0016] 3) The control method uses a limit switch in conjunction with the linkage of the sensing block to avoid mechanical damage to the sensing sensor.
[0017] 4) The use of limiters not only improves the guiding function, but also allows the height of the stop bar to be adjusted according to the installation height of the limiter on the column, which facilitates construction operations. Attached Figure Description
[0018] Figure 1 Overall schematic diagram of the wire rope slack protection device for the inclined shaft hoisting winch; Figure 2 Schematic diagram of limit switch and sensing sensor installation; Figure 3 Schematic diagram of the limit switch structure; Figure 4A schematic diagram showing the state of the linkage sensing block descending to the bottom of the limit switch; Figure 5 Schematic diagram of pulley system and deflector wheel.
[0019] In the diagram: 1. Column; 2. Intrinsically safe inductive sensor for mining; 3. Sensor mounting bracket; 4. Limiter; 5. Linkage sensing block; 6. Rope; 7. Pulley block; 7-1. Support 1; 8. Directional wheel; 8-1. Support 2; 9. Stop bar; A. Shaped hole; B. Bottom of limiter; C. U-shaped wheel with bearing. Detailed Implementation
[0020] This utility model relates to a slack rope protection device for a coal mine inclined shaft hoisting winch, comprising two movable columns, an intrinsically safe inductive sensor, a sensor mounting bracket, a limit switch, a linkage sensing block, a rope, a pulley block, a directional wheel, and a stop rod. The height of the two columns is set according to the rope exit height of the hoisting winch, and the column installation width is selected according to the width of the rope winding roller of the hoisting winch. The limit switch is fixed to the outside of the two columns. There are two linkage sensors. Under normal circumstances, the linkage sensors are placed at the bottom of the limit switch. The intrinsically safe inductive sensor installed at the bottom of the limit switch detects the slack rope. When the intrinsically safe inductive sensor activates, it sends an electrical signal to the control system, indicating that the wire rope has not reached the slack rope protection limit. Two linkage sensing blocks are connected at the top by a rope, with a stop bar in the middle of the rope to reduce friction between the wire rope and the cable. The linkage sensor is similar in shape to a limit switch, and its weight is set so that the sum of the tension on the rope under gravity minus approximately 1.5 times the stop bar, the rope's weight, and friction on the rope's tension equals approximately 100 Newtons. When the linkage sensing block is not slack, it is placed at the bottom of the limit switch and can move freely up and down within the limit switch under the traction of the rope. When the wire rope slackens and the pressure on the stop bar decreases, the downward force, combined with the force of the rope, the stop bar, and friction, results in a tension greater than 100 Newtons. At this point, the stop bar will cause the rope to descend, pulling one or both linkage sensing blocks on both sides to rise from the limit switch. When the linkage sensing block exceeds the sensing distance of the intrinsically safe inductive sensor used in mining, the sensor will send an electrical signal to the control system, indicating that the wire rope has slackened beyond its limit position, and further slackening is prohibited. This device is easy to install, highly applicable, and has high flexibility and reliability. It can not only improve the efficiency of operators in slack rope operation, but also effectively prevent wire rope from becoming tangled or messy due to accidental slack or excessive slack in the winch.
[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings. As attached Figure 1As shown, there are two columns 1. They are installed on the ground at certain positions on both sides of the winch outlet. The height of the columns and the installation width of the two columns are set according to the size of the winch drum and the height of the wire rope outlet. A pulley group 7 for winding the rope is installed on the top of each column 1. A deflector wheel 8 for changing the winding direction of the rope is installed on the upper inner side of the two columns, which determines the height of the stop rod 9 under normal conditions. The limiter 4 is installed on the outside of the column to limit the descent height of the linkage sensing block 5. The intrinsically safe inductive sensor 2 is installed at the bottom B of the limiter 4 through the sensor mounting bracket 3. The bottom of the limiter has a hole A. The intrinsically safe inductive sensor 2 senses the linkage sensing block 5 through the hole in the limiter. When the linkage sensing block 5 descends to the bottom of the limiter, the intrinsically safe inductive sensor 2 is activated. The two ends of the rope 6 are connected to the linkage sensing block 5, and it passes through the pulley blocks 7 and the directional pulley 8 on both sides. The stop rod 9 is fixed to the rope between the two columns. When the linkage sensing block 4 falls to the bottom B of the limiter, the stop rod 9 rises to the highest position as the height for rope slack protection. When the wire rope slacks down and contacts the stop rod 9, it continues to descend. The stop rod 9 will pull the linkage sensing block 5 fixed at the end of the rope to rise through the rope. When the linkage sensing block 5 rises beyond the sensing distance of the intrinsically safe inductive sensor 2, the sensor 2 will activate and send an electrical signal to control the winch to stop and prevent the rope from slackening further.
[0022] As attached Figure 2-3 As shown, the inner cavity of the limiter and the outer shape of the linkage sensing block are similar, which facilitates the linkage sensing block to move freely up and down under the traction of the rope 6, while also ensuring that the linkage sensing block has a certain direction during its movement.
[0023] As attached Figure 4 As shown, before the wire rope contacts the stop rod 9, due to the weight of the two linkage sensing blocks minus the force of the stop rod, rope, and friction, the linkage sensing block falls to the bottom B of the limiter. The intrinsically safe inductive sensor 2 installed on the limiter senses the bottom of the linkage sensing block through the hole A at the bottom of the limiter and sends an electrical signal. The control system determines that the linkage sensing block is at the bottom based on this signal. When the wire rope presses down on the stop rod 9, the stop rod 9 drives the rope to descend, pulling the linkage sensing block upward. When the linkage sensing block exceeds the sensing distance of the intrinsically safe inductive sensor, the sensor will send an electrical signal to the control system again, indicating that the wire rope has slackened to the limit position and further slackening is prohibited.
[0024] As attached Figure 5 As shown, the pulley block 7 and the reversing wheel 8 are composed of a bracket 7-1 and a bracket 8-1 with a certain shape and a U-shaped wheel C with a bearing, to ensure that the resistance of the stop rod pulling the rope is reduced.
[0025] Example 1
[0026] A slack rope protection device for a coal mine inclined shaft hoisting winch includes columns, a sensor mounting frame, an intrinsically safe inductive sensor, a limit switch, a linkage sensing block, a rope, a pulley block, a directional wheel, and a stop rod. Two columns are installed on the ground at specific positions on both sides of the winch outlet. The height of the columns and the installation width of the two columns are set according to the width of the winch drum and the height of the wire rope outlet. A pulley block for winding the rope is installed at the top of each column, and directional wheels for changing the winding direction of the rope are installed on the upper inner side of the two columns, determining the height of the stop rod. The limit switch is installed on the outside of the columns, and its installation height on the columns is set according to the rope length and slack rope limit. The intrinsically safe inductive sensor is mounted on the bottom of the limit switch via the sensor mounting frame. A hole is opened at the bottom of the limit switch, and the intrinsically safe inductive sensor senses the linkage sensing block through the hole in the limit switch. When the linkage sensing block descends to the bottom of the limit switch, the intrinsically safe inductive sensor is activated. Two linkage sensing blocks are connected at the top by a rope, with a stop bar in the middle of the rope to reduce friction between the wire rope and the cable. The linkage sensor is similar in shape to a limit switch, and its weight is set so that the sum of the tension on the rope under gravity minus 1.5 times the stop bar, the rope's weight, and the frictional force on the rope's tension equals approximately 100 Newtons. When the linkage sensing block falls to the bottom of the limit switch, the stop bar rises to its highest position as a slack rope protection height. When the wire rope slackens and descends, it contacts the stop bar and continues to descend. The stop bar then pulls the linkage sensing block fixed at the end of the rope upward through the rope. If the linkage sensing block rises beyond the detection distance of the intrinsically safe inductive sensor used in mining, the sensor will activate and send an electrical signal to stop the winch and prevent further slack rope.
Claims
1. A slack rope protection device for a wire rope hoisting winch in a coal mine inclined shaft, characterized in that its structure includes two columns (1), an inductive sensor (2), a sensor mounting bracket (3), a limiter (4), a linkage sensing block (5), a rope (6), a pulley block (7), a reversing wheel (8), and a stop rod (9); the columns (1) are located on both sides of the winch outlet, the installation position is set according to the width of the winch winding pulley, and the height of the columns is set according to the rope exit height; the top of the two columns (1) is equipped with a pulley block (7) for winding the rope (6), and the upper inner side of the columns (1) is equipped with a reversing wheel (8) for changing the winding direction of the rope (6); the limiter (4) is installed on the columns. (1) On the outside, the linkage sensing block (5) is movably placed inside the limiter (4). The linkage sensing block can move up and down in the limiter under the traction of the rope. The two ends of the rope are connected to the upper part of the linkage sensing block and pass around the pulley group (7) and the directional wheel (8) on both sides. The stop rod (9) is fixed on the rope between the two columns (1) to reduce the wear of the wire rope on the rope. The limiter (4) has a hole at the bottom. The inductive sensor (2) is installed at the bottom of the limiter (4) through the sensor mounting bracket (3). The inductive sensor (2) senses the action through the hole of the limiter and the linkage sensing block (5) and sends an electrical signal to the control system.
2. The slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that: The shape of the linkage sensing block is similar to the contour of the limiter cavity, but the contour is smaller than that of the limiter.
3. The slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that: The weight of the linkage sensing block is 50-150N greater than the sum of 1.5 times the weight of the rope, the weight of the stop rod, and the friction force of the device.
4. The slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that: The pulley block (7) and the deflector (8) are U-shaped wheels with bearings to reduce the resistance during the rope lifting process.
5. A slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that... There are two inductive sensors, which are respectively installed on the two side columns. Both inductive sensors are linked to the linkage sensor, and either action can play a role in slack rope protection.
6. A slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that... When no external force is applied, the linkage sensing block automatically returns to its initial position under the action of the limiter, without the need for manual intervention.
7. A slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that... The sensor mounting bracket (3) and limiter (4) can be adjusted and installed on the column (1) with adjustable height.
8. A slack rope protection device for a coal mine inclined shaft hoisting winch according to claim 1, characterized in that... The column can be moved and installed.
9. A slack rope protection device for a coal mine inclined shaft hoisting winch according to any one of claims 1-8, characterized in that... The inductive sensor is an intrinsically safe sensor for mining applications.