Emergency stopping device for mining tunnel mining car

Abstract

The present application relates to the technical field of emergency stopping of mine car, and discloses a mine car emergency stopping device for mining tunnel, which comprises a mine car buffer mechanism, a mine car stopping mechanism and a radar speedometer, and forms a multi-stage response system for emergency interception of the mine car; the mine car buffer mechanism comprises support frames arranged on both sides of the mine car track in the mine, and a mine car interception assembly is arranged in the support frames; the mine car interception assembly comprises a vertical moving plate, which is kept flush with the height of the mine car body during interception; the radar speedometer, the mine car buffer mechanism and the mine car stopping mechanism are cooperated with each other, the mine car overspeed out-of-control signal is identified first, and then the multi-stage stopping process of flexible interception, double friction braking and gradual dissipation of residual kinetic energy is completed, so that the mine car is slowed down and stopped without relying on the braking components of the mine car body, the risk of spark and component damage caused by rigid and hard interception is avoided, and the complex running car accident working condition in the mine is adapted.

Description

Technical Field

[0001] This invention relates to the field of emergency stopping technology for mining cars, specifically an emergency stopping device for mining cars used in mining tunnels. Background Technology

[0002] In mining, tunneling, and underground engineering construction, mine cars are one of the most commonly used transportation devices in rail transport systems. They are mainly used to transport ore, gangue, materials, and equipment back and forth along tracks laid in roadways. Due to the narrow space, steep gradients, low visibility, and severe dust and humidity in underground roadways, and the presence of curves, switches, loading and unloading points, and personnel work areas along the tracks, mine cars are highly susceptible to slippage, runaway, or uncontrolled sliding accidents if brake failure, connecting device breakage, traction cable breakage, control system malfunction, or human error occurs during operation. When an uncontrolled mine car slides at high speed along the tracks, it not only damages the tracks, support structures, and equipment along the line, but may also collide with other vehicles or workers, causing serious personal injury and property damage, and even triggering secondary accidents, seriously threatening safe production in the mine.

[0003] To mitigate the risks associated with runaway mine cars, various braking or stopping devices have been developed in the existing technology. However, the braking systems of existing mine cars typically rely on onboard power sources or manual operation. Under extreme conditions such as broken traction connections, damage to air or hydraulic lines, or power failure in the control system, they often fail to operate reliably and cannot achieve effective stopping in a short time. Existing stopping devices often lack buffering and energy absorption during the interception process. Rigid collisions between the mine car and the interception mechanism can easily lead to damage to the mine car, deformation of the track, failure of the interception device, and even sparks generated by the collision, posing a risk of ignition and explosion in explosive environments such as gas or coal dust. The safety of these devices is insufficient to meet the stringent requirements of underground working conditions. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an emergency stopping device for mining trucks in mining tunnels. The main purpose is to solve the problems that existing mining truck braking systems rely on onboard power sources or manual operation, and that existing stopping devices lack buffering and energy absorption during the interception process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An emergency stopping device for mine cars in mining tunnels includes a mine car buffer mechanism, a mine car blocking mechanism, and a radar speed detector, forming a multi-level response system for emergency interception of mine cars; The mine car buffer mechanism includes a support frame arranged on both sides of the mine car track in the mine roadway. The support frame is equipped with a mine car interception component. The mine car interception component includes a vertical moving plate. When the vertical moving plate is intercepting, it is kept at the same height as the mine car body. Several rope buckles are evenly arranged on the opposite sides of the two sets of vertical moving plates along the direction of the mine car's travel. A mine car interception cable is set between the two vertical moving plates. The two ends of the mine car interception cable pass through the rope buckles and are respectively connected to the vertical moving plates on both sides. The mine car stopping mechanism is arranged between the mine car tracks. The mine car stopping mechanism includes an underground impact reduction structure and a lifting force application mechanism for driving the lifting and lowering action of the impact reduction structure. The impact reduction structure includes a mounting platform. The top surface of the mounting platform is symmetrically equipped with two transverse guide rods for horizontally guiding the limiting cover. After the limiting cover is raised, it can contact the connecting axle of the mine car wheel. A reset spring for resetting the limiting cover is sleeved on the transverse guide rod. A deceleration guide mechanism is arranged below the lifting force application mechanism. The radar speed measuring instrument is arranged on the side of the track in the direction of oncoming vehicles of the mine car buffer mechanism, and is used to collect the speed signal of the mine car.

[0006] As a further embodiment of the present invention, the limiting cover has an arc structure, the concave surface of the limiting cover faces the direction of the mine car, and multiple sets of friction plates are fixed on the concave side of the limiting cover. The friction plates move synchronously with the limiting cover to contact the connecting shaft of the mine car wheel.

[0007] As a further embodiment of the present invention, the limiting shield is symmetrically equipped with limiting guide posts on the side facing away from the oncoming vehicle. The limiting guide post is slidably equipped with an extension sleeve, and a brake disc is installed at the outer end of the extension sleeve. A triangular guide plate is fixed on the top surface of the mounting platform, and side guide grooves are opened on both sides of the guide plate. A movable roller is mounted below the extension sleeve through a connecting frame. The movable roller is placed inside the side guide groove. When the extension sleeve is raised with the mounting platform, the movable roller rolls along the groove wall of the side guide groove to drive the two sets of brake discs to make outward displacement. After opening, the brake discs fit against the mine car wheels. A fire extinguishing bag is detachably installed on the side of the mounting platform facing the barrier cover for extinguishing sparks.

[0008] As a further embodiment of the present invention, two sets of top surface guide grooves are formed on the top surface guide plate, and guide sliders are installed in the top surface guide grooves. The guide sliders are connected to the extension sleeve. During the retraction of the extension sleeve, the guide sliders slide along the top surface guide grooves to limit the retraction trajectory of the extension sleeve. A blocking plate is fixed to the outer wall of the extension sleeve, and a spacer plate is fixed to the back of the limiting cover. The blocking plate and the spacer plate abut against each other to limit the maximum outward expansion stroke of the brake disc.

[0009] As a further embodiment of the present invention, the lifting force application mechanism includes an electric push rod arranged below the mounting platform. The output end of the electric push rod is connected to the bottom surface of the mounting platform. A plurality of guide sleeves are fixed on the bottom surface of the mounting platform. A guide post is inserted inside the guide sleeve. The bottom end of the guide post is connected to the deceleration guide mechanism. The guide post slides along the inside of the guide sleeve to limit the lifting movement path of the mounting platform.

[0010] As a further embodiment of the present invention, the deceleration guide mechanism includes two sets of symmetrically arranged guide rails. A movable platform is slidably mounted on the guide rails. An extrusion plate is fixed to the side of the guide rail. An inclined surface is provided on the outer side of the extrusion plate. The inclined surface is inclined towards the center at the end near the incoming vehicle. A positioning frame is installed inside the cavity of the movable platform. The angle of the positioning frame is adapted to the angle of the inclined surface of the extrusion plate. A pulley is rotatably mounted on the positioning frame. The pulley rolls against the inclined surface of the extrusion plate. An extension column is fixed on the side of the positioning frame opposite to the pulley. The extension column passes through the movable platform to form a sliding pair. A compression spring is sleeved on the outside of the extension column. The two ends of the compression spring abut against the positioning frame and the movable platform, respectively. When the pulley moves along the inclined surface, the compression spring undergoes compression deformation.

[0011] As a further embodiment of the present invention, two sets of dust covers are provided between the two mine car tracks. The dust covers are rotatably connected to the concrete base under the ground through a torsion spring shaft. The dust covers are located directly above the impact mitigation structure. When the dust covers are closed, they cover the upper part of the impact mitigation structure to block external dust and debris.

[0012] As a further embodiment of the present invention, the rope buckle includes a fixed buckle frame, which is assembled with the vertical moving plate by means of bolts. Multiple cut plates are fixedly connected to the force-bearing side of the fixed buckle frame. Cut grooves are opened on the side of the cut plates facing away from the force-bearing side. The mine car intercepting cable is placed in the annular hole formed by the fixed buckle frame and the cut plates.

[0013] As a further embodiment of the present invention, a vertical guide rail is fixed inside the support frame, and the vertical moving plate is slidably engaged with the vertical guide rail via a slider, allowing the vertical moving plate to move vertically along the vertical guide rail; an electric unhooking device is mounted on the support frame, and a connecting plate is fixed at a position corresponding to the vertical moving plate and the electric unhooking device, with the connecting plate hooked onto the electric unhooking device for suspending and positioning the vertical moving plate.

[0014] As a further embodiment of the present invention, a winch is installed on the upper part of the support frame, and the traction rope of the winch is connected to the connecting plate. The winch winds up and unwinds the rope to drive the connecting plate and the vertical moving plate to move up and down along the vertical guide rail.

[0015] Compared with the prior art, the present invention provides an emergency stopping device for mine cars in mining tunnels, which has the following beneficial effects: 1. This invention utilizes a multi-level emergency interception response system that coordinates radar speed measuring instruments, mine car buffer mechanisms, and mine car stopping mechanisms. It first identifies the mine car's overspeed and loss of control signal, and completes a multi-level stopping process involving flexible interception, dual friction braking, and gradual dissipation of residual kinetic energy. It does not rely on the mine car's own braking components, thus achieving deceleration and stopping of the out-of-control mine car. It avoids the risks of sparks and component damage caused by rigid hard interception, and is suitable for complex runaway accident conditions underground.

[0016] 2. This invention uses a combination of mine car interception cable and rope buckle to achieve flexible buffering and blocking by means of the interception cable. In the event of impact overload, the cable can be broken in a controlled manner to dissipate the impact energy, thereby preventing the main load-bearing components such as the support frame and vertical moving plate from being torn apart by the huge impact force and improving the impact resistance of the device.

[0017] 3. This invention achieves dual friction braking of the axle and wheels, as well as progressive energy absorption by the spring, through the combination of a limiting cover, brake disc and deceleration guide mechanism; at the same time, the dust cover protects the components buried under the track, reduces the mechanism jamming caused by dust and gangue, and improves the reliability of the equipment in the dusty and humid environment underground. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an emergency stopping device for mining cars in a mining tunnel proposed in this invention; Figure 2 This invention proposes an emergency stopping device for mine cars used in mining tunnels. Figure 1 A top-down view; Figure 3 This is a schematic diagram of the mine car buffer mechanism of an emergency stopping device for mine cars in mining tunnels proposed in this invention; Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the mine car buffer mechanism of an emergency stopping device for mine cars in mining tunnels proposed in this invention; Figure 5 This is a schematic diagram of the rope buckle structure of an emergency stopping device for mining cars in mining tunnels proposed in this invention; Figure 6 This is a schematic diagram of the dust cover structure of an emergency stopping device for mining cars in mining tunnels proposed in this invention; Figure 7 This is a schematic diagram showing the location of the mine car stopping mechanism in an emergency stopping device for mine cars in a mining tunnel, as proposed in this invention. Figure 8 This is a schematic diagram of the limiting cover structure of an emergency stopping device for mining cars in mining tunnels proposed in this invention; Figure 9 This is a schematic diagram of the deceleration and guiding mechanism of an emergency stopping device for mine cars in mining tunnels proposed in this invention; Figure 10 This is a schematic diagram of the positioning frame and pulley structure of an emergency stopping device for mining cars in a mining tunnel, as proposed in this invention.

[0019] Figure 11 This is a schematic diagram of the guide rail and extrusion plate structure of an emergency stopping device for mining cars in a mining tunnel, as proposed in this invention.

[0020] Figure 12 This is a schematic diagram of the side guide groove and top guide groove structure of an emergency stopping device for mining cars in a mining tunnel proposed in this invention.

[0021] Figure 13 This is a side view of the mine car stopping mechanism of an emergency stopping device for mine cars in mining tunnels proposed in this invention.

[0022] Figure 14 This is a schematic diagram of the vertical cross-sectional structure of the extended sliding sleeve of an emergency stopping device for mining cars in a mining tunnel, as proposed in this invention.

[0023] Figure 15 This invention proposes an emergency stopping device for mine cars used in mining tunnels. Figure 11 A top-down view.

[0024] Figure 16 This invention proposes an emergency stopping device for mine cars used in mining tunnels. Figure 13 An explosion diagram.

[0025] Figure 17 This is a general flowchart of an emergency stopping device for mining cars in a mining tunnel proposed in this invention.

[0026] In the diagram: 1. Mine car buffer mechanism; 101. Support frame; 102. Vertical guide rail; 103. Vertical moving plate; 104. Rope buckle; 10401. Fixed buckle frame; 10402. Cut-off plate; 10403. Cut-off groove; 105. Mine car intercepting cable; 106. Connecting plate; 107. Electric unhooking device; 108. Winch; 2. Mine car stopping mechanism; 201. Dust cover; 202. Deceleration guide mechanism; 20201. Guide rail; 20202. Moving platform; 20203. Extrusion plate; 20204. Positioning frame; 20205. Pulley; 202 06. Extension column; 20207. Compression spring; 203. Mounting platform; 204. Electric push rod; 205. Guide column; 206. Limiting cover; 20601. Friction plate; 207. Brake disc; 208. Lateral guide rod; 209. Return spring; 210. Guide plate; 21001. Side guide groove; 21002. Top guide groove; 211. Guide sleeve; 212. Guide slider; 213. Moving roller; 214. Limiting guide column; 215. Extension sleeve; 216. Barrier plate; 217. Distance plate; 218. Fire extinguishing bag; 3. Radar speedometer. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] Please see Figures 1-17 As shown, an emergency stopping device for mine cars in mining tunnels addresses the issue that most mine car runaway accidents in underground mines are caused by the failure of the mine car's own braking system, making it impossible to stop the car simply by relying on its own braking components. Furthermore, most external interception mechanisms on the market are rigid blocking structures, which can easily damage the track and stopping equipment upon impact with a high-speed mine car. Additionally, the sparks generated by the impact pose an explosion hazard in mines containing gas and coal dust. To solve these problems, this solution uses a radar speed detector 3 as a detection unit, combined with two independent interception units: a mine car buffer mechanism 1 and a mine car stopping mechanism 2, forming a multi-level response system for emergency interception of mine cars. The mine car buffer mechanism 1 is located upstream for flexible interception, while the mine car stopping mechanism 2 is buried between the tracks for flexible deceleration and stopping. The two work together to complete the identification, buffering, gradual deceleration and stopping of runaway mine cars without relying on the braking devices of the mine car itself.

[0031] Multiple mine car buffer mechanisms 1, mine car stopping mechanisms 2, and radar speed measuring instruments 3 are respectively deployed in sections on the mine car track.

[0032] First, refer to Figures 1 to 5 As shown, the radar speed detector 3 is arranged on the side of the track in the direction of oncoming traffic of the mine car buffer mechanism 1. The radar speed detector 3 can be a TH-LDS model. It is installed inside the mine track by a bracket and continuously collects the speed signal of the mine car. Once the mine car is detected to be in an overspeed and out-of-control state, it outputs a trigger signal. Correspondingly, the mine car buffer mechanism 1 has a support frame 101 erected on both sides of the mine track. The electric unhooking device 107 located inside the support frame 101 receives the signal and releases the hooked connecting plate 106. The vertical moving plate 103, which is bolted to the connecting plate 106, slides vertically downward through the vertical guide rail 102 installed inside the support frame 101. The winch 108 installed inside the support frame 101 has a rope that is continuously tied to the connecting plate 106. One end of the rope will fall together with the vertical moving plate 103 until the vertical moving plate 103 is level with the mine car. Meanwhile, rope buckles 104 are evenly installed on opposite sides of two sets of vertically moving plates 103, and mine car interception cables 105 are threaded inside the rope buckles 104. With the mine car interception cables 105 positioned laterally directly in front of the mine car, they can stop the mine car as it passes. Because the mine car interception cable 105 is not a solid steel bar, but rather composed of multiple thin steel wires twisted into strands, this structure ensures both overall strength and a certain degree of flexibility, preventing brittle breakage under heavy impact. It typically also contains a hemp core or synthetic fiber core to store lubricating oil and increase cushioning, thus providing flexible interception.

[0033] To avoid excessive resistance during interception, the rope buckle 104 is designed to consist of a fixed buckle frame 10401, a cutting plate 10402, and a cutting groove 10403. When the impact force exceeds a preset threshold, the mine car interception cable 105 will compress the cutting plate 10402, achieving a controllable cut at the cutting groove 10403. This not only dissipates some of the impact kinetic energy but also prevents the main structure, such as the support frame 101 and the vertical moving plate 103, from being torn apart. Of course, if the impact energy of the mine car is relatively small, the mine car interception cable 105 can directly stop the mine car.

[0034] After successfully intercepting the mine car, a manual inspection is required to check for any parts that need to be replaced or reset. Once the replacement and reset are completed, the traction rope of the winch 108 will rewind and pull the connecting plate 106 vertically upward until the connecting plate 106 is hooked onto the electric release device 107. The mine car interception cable 105 will be at a high position above the track and will not interfere with the normal passage of the mine car. When the connecting plate 106 is hooked onto the electric release device 107, the traction rope of the winch 108 will be released again to the length that allows the vertical moving plate 103 to fall. Upon receiving a loss of control signal, the electric release device 107 will release, and the vertical moving plate 103 will fall rapidly along the vertical guide rail 102 to the same height as the mine car body.

[0035] However, under certain working conditions, the mine car speed is too high. In order to ensure that the mine car can be stopped safely, it is necessary to activate the mine car stopping mechanism 2 at the same time to reduce speed.

[0036] Please refer to Figures 6 to 16 The mine car stopping mechanism 2 is arranged between two mine car tracks and is normally stored underground. At the same time, two sets of dust covers 201 with torsion spring shafts are installed between the tracks. The dust covers 201 are normally closed and can block dust and gangue fragments in the mine tunnel, preventing the parts of the lower impact reduction mechanism from being stuck by debris. When the lifting force mechanism pushes upward, the mechanism body will directly push open the dust cover 201.

[0037] In this lifting force application mechanism, the electric push rod 204 serves as the power source. The output end of the electric push rod 204 is connected to the mounting platform 203. The guide sleeve 211 on the bottom surface of the mounting platform 203 and the guide column 205 form a sliding fit. The bottom end of the guide column 205 is connected to the deceleration guide mechanism 202. Therefore, when the electric push rod 204 drives the mounting platform 203 to lift upward, the guide sleeve 211 slides vertically along the guide column 205, thereby constraining the mounting platform 203 to only make vertical displacement, avoiding the phenomenon of skew and jamming during the lifting process. In addition, the guide sleeve 211 and the guide column 205 can also serve as lateral support components to prevent the push rod of the electric push rod 204 from breaking when the mine car impacts it.

[0038] When it is necessary to intercept the mine car, the mounting platform 203 is raised, and the limiting cover 206 is raised first. The concave surface of the arc-shaped limiting cover 206 faces the oncoming car, and the multiple sets of friction plates 20601 on the concave side directly contact the connecting axle of the mine car wheel. The friction between the friction plate 20601 and the axle consumes the kinetic energy of the mine car. The friction plate 20601 is made of alloy cast iron. At the same time, the limiting cover 206 is impacted and slides horizontally along the transverse guide rod 208. The return spring 209, which is sleeved on the body of the transverse guide rod 208, is compressed by the pressure. The deformation of the return spring 209 absorbs part of the impact. When the pressure disappears, the return spring 209 can push the limiting cover 206 to complete the reset.

[0039] In order to enhance the friction on the mine car wheels, in addition to the limiting cover 206, a limiting guide post 214, an extension sleeve 215 and a brake disc 207 are also provided on the back of the limiting cover 206. A triangular guide plate 210 is fixed on the mounting platform 203. As the limiting cover 206 is impacted, the moving roller 213 at the lower end of the extension sleeve 215 rolls along the side guide grooves 21001 on both sides of the guide plate 210. Constrained by the contour of the side guide grooves 21001, the two sets of extension sleeves 215 slide away from each other along the limiting guide post 214, thereby driving the brake discs 207 on both sides to open outward and press against the mine car wheels, thus forming a double friction braking of the axle and the wheels.

[0040] To prevent the extension sleeve 215 from disengaging from the limiting guide post 214, the guide slider 212 slides synchronously in the guide groove 21002 on the top surface of the guide plate 210 while the extension sleeve 215 moves, further constraining the movement trajectory of the extension sleeve 215; and the blocking plate 216 on the extension sleeve 215 abuts against the spacer plate 217 on the back of the limiting cover 206, thereby limiting the maximum outward expansion stroke of the brake disc 207 and preventing the brake disc 207 from opening too much and disengaging from the wheel. To prevent sparks from occurring during friction between the friction pad 20601 and the brake disc 207, such as Figure 8 , Figure 14 and Figure 15As shown, a fire extinguishing bag 218 is detachably installed on the side of the mounting platform 203 facing the limiting cover 206. When the limiting cover 206 moves towards the fire extinguishing bag 218 on the surface of the transverse guide rod 208, the tip of the final blocking plate 216 will puncture the fire extinguishing bag 218, as shown. Figure 8 As shown, the fire extinguishing bag 218 is equipped with a ruptureable material at the position facing the barrier plate 216, allowing the extinguishing material inside the fire extinguishing bag 218 to be released towards the location where sparks may occur. Figure 14 As shown, the surface of the limiting cover 206 has an air passage groove, which allows fire extinguishing materials to pass through for fire extinguishing.

[0041] Fire extinguishing bag 218 is a single-use product and needs to be replaced after use. The extinguishing material inside the fire extinguishing bag 218 can be selected from dry powder, carbon dioxide, water-based, foam and other materials, and can be replaced as needed.

[0042] Furthermore, when the limit cover 206 is reset, the guide slider 212 will restrict the return path.

[0043] Even after the above-mentioned double friction braking, the mine car still has residual kinetic energy. The mine car will push the entire mine car stopping mechanism 2 to move along the track direction, which will trigger the deceleration guide mechanism 202. The guide rail 20201 of the deceleration guide mechanism 202 is fixed as the base guide, and the moving platform 20202 can slide along the guide rail 20201. The pulley 20205 is mounted on the positioning frame 20204. The pulley 20205 always fits against the inclined surface of the extrusion plate 20203 inside the guide rail 20201. When the moving platform 20202 moves towards the oncoming car side due to the impact of the mine car, the pulley 20205 will roll along the inclined surface of the extrusion plate 20203, forcing the positioning frame 20204 to extrude the extension column 20206, thereby compressing the compression spring 20207. As the inclined surface of the extrusion plate 20203 gradually widens, the force of the compression spring 20207 continuously increases. Relying on the continuous compression deformation of the compression spring 20207 to absorb the remaining kinetic energy of the mine car, the mine car is slowly decelerated and stopped.

[0044] It successfully brought the runaway mining truck to a slow stop.

[0045] The present invention is used in the following steps: Step 1: The radar speedometer 3 detects the speed of the mine car in real time, identifies the mine car overspeeding and loss of control, and outputs a trigger signal.

[0046] Step 2: The electric unhooking device 107, located 10 meters away from the radar speedometer 3, receives the signal and unhooks within a few milliseconds (e.g., 2-5 milliseconds). The vertical moving plate 103 falls along the vertical guide rail 102 until it is flush with the mine car body. The mine car interception cable 105 is in place to flexibly intercept the mine car. When there is an impact overload, the rope buckle 104 can controllably cut the mine car interception cable 105 to dissipate the impact kinetic energy.

[0047] Step 3: Simultaneously, the electric push rod 204 drives the mounting platform 203 to lift, opening the dust cover 201. The limiting cover 206 lifts and contacts the connecting shaft of the mine car wheel. The friction plate 20601 rubs against the axle to consume kinetic energy, and the return spring 209 absorbs the impact.

[0048] Step 4: During the lifting process, the moving roller 213 rolls along the guide groove 21001 on the side of the guide plate 210, driving the extension sleeve 215 to open the brake disc 207 outward and press it against the mine car wheel, achieving dual friction braking of the axle and wheel; at the same time, the fire extinguishing bag 218 is punctured and releases fire extinguishing material to prevent sparks from appearing. The top guide groove 21002 and the barrier plate 216 work together with the spacer plate 217 to constrain the opening stroke of the brake disc 207.

[0049] Step 5: The residual kinetic energy of the mine car drives the mine car stopping mechanism 2 to slide along the track. The inner pulley 20205 of the deceleration guide mechanism 202 moves along the inclined plane of the extrusion plate 20203, compressing the extrusion spring 20207. The remaining kinetic energy is absorbed by the deformation of the spring, and the mine car gradually decelerates until it stops completely.

[0050] Step 6: After the stop is completed, check and replace the damaged parts; the electric push rod 204 drives the mine car stopping mechanism 2 to fall back, and the dust cover 201 closes; the winch 108 lifts the vertical moving plate 103, the connecting plate 106 is hooked to the electric unhooker 107, the mine car intercepting cable 105 is raised to a high position, and the device returns to standby status.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An emergency stopping device for mine cars used in mining tunnels, characterized in that, It includes a mine car buffer mechanism (1), a mine car stopping mechanism (2), and a radar speed measuring instrument (3), forming a multi-level response system for emergency interception of mine cars; The mine car buffer mechanism (1) includes a support frame (101) arranged on both sides of the mine car track. The support frame (101) is equipped with a mine car interception component. The mine car interception component includes a vertical moving plate (103). When the vertical moving plate (103) is intercepting, it is flush with the mine car body. Several rope buckles (104) are evenly arranged on the opposite sides of the two sets of vertical moving plates (103) along the direction of mine car travel. A mine car interception cable (105) is provided between the two vertical moving plates (103). The two ends of the mine car interception cable (105) pass through the rope buckles (104) and are respectively connected to the vertical moving plates (103) on both sides. The mine car stopping mechanism (2) is arranged between the mine car tracks. The mine car stopping mechanism (2) includes an underground impact reduction structure and a lifting force application mechanism for driving the lifting and lowering action of the impact reduction structure. The impact reduction structure includes a mounting platform (203). The top surface of the mounting platform (203) is symmetrically equipped with two transverse guide rods (208) for horizontally guiding the limiting cover (206). After the limiting cover (206) is raised, it can contact the connecting shaft of the mine car wheel. The transverse guide rod (208) is fitted with a reset spring (209) for resetting the limiting cover (206). A deceleration guide mechanism (202) is arranged below the lifting force application mechanism. The radar speed measuring instrument (3) is arranged on the side of the track in the direction of the incoming car of the mine car buffer mechanism (1) to collect the speed signal of the mine car.

2. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, The limiting cover (206) has an arc structure. The concave surface of the limiting cover (206) faces the direction of the mine car. Multiple sets of friction plates (20601) are fixed on the concave side of the limiting cover (206). The friction plates (20601) move synchronously with the limiting cover (206) to contact the connecting shaft of the mine car wheel.

3. The emergency stopping device for mine cars in mining tunnels according to claim 2, characterized in that, The limiting cover (206) is symmetrically equipped with limiting guide posts (214) on the side facing away from the incoming car. The limiting guide post (214) is slidably equipped with an extension sleeve (215). The outer end of the extension sleeve (215) is equipped with a brake disc (207). The top surface of the mounting platform (203) is fixed with a triangular guide plate (210). The guide plate (210) has side guide grooves (21001) on both sides. The extension sleeve (215) is equipped with a movable roller (213) through a connecting frame. The movable roller (213) is placed inside the side guide groove (21001). When the extension sleeve (215) is raised with the mounting platform (203), the movable roller (213) rolls along the groove wall of the side guide groove (21001) to drive the two sets of brake discs (207) to make outward displacement. After opening, the brake discs (207) fit against the mine car wheels. The mounting platform (203) facing the barrier cover (206) is detachably equipped with a fire extinguishing bag (218) for extinguishing sparks.

4. The emergency stopping device for mine cars in mining tunnels according to claim 3, characterized in that, Two sets of top surface guide grooves (21002) are opened on the top surface of the guide plate (210). A guide slider (212) is installed in the top surface guide groove (21002). The guide slider (212) is connected to the extension sleeve (215). During the retraction of the extension sleeve (215), the guide slider (212) slides along the top surface guide groove (21002) to limit the retraction trajectory of the extension sleeve (215). A barrier plate (216) is fixed on the outer wall of the extension sleeve (215). A spacer plate (217) is fixed on the back of the limit cover (206). The barrier plate (216) and the spacer plate (217) abut against each other to limit the maximum stroke of the brake disc (207) to expand outward.

5. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, The lifting force application mechanism includes an electric push rod (204) arranged below the mounting platform (203). The output end of the electric push rod (204) is connected to the bottom surface of the mounting platform (203). Several guide sleeves (211) are fixed on the bottom surface of the mounting platform (203). A guide post (205) is inserted inside the guide sleeve (211). The bottom end of the guide post (205) is connected to the deceleration guide mechanism (202). The guide post (205) slides along the inside of the guide sleeve (211) to limit the lifting movement path of the mounting platform (203).

6. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, The deceleration guide mechanism (202) includes two sets of symmetrically arranged guide rails (20201). A movable platform (20202) is slidably mounted on the guide rails (20201). An extrusion plate (20203) is fixed to the side of the guide rails (20201). The outer surface of the extrusion plate (20203) is provided with an inclined surface, which is inclined towards the center at the end near the incoming vehicle. A positioning frame (20204) is installed inside the cavity of the movable platform (20202). The angle of the positioning frame (20204) is adapted to the angle of the inclined surface of the extrusion plate (20203). The positioning frame (20204) is rotatably mounted with a pulley (202). 05), the pulley (20205) rolls against the inclined surface of the extrusion plate (20203); the positioning frame (20204) has an extension column (20206) fixed on the side opposite to the pulley (20205), the extension column (20206) passes through the moving platform (20202) to form a sliding pair, and a compression spring (20207) is sleeved on the outside of the extension column (20206). The two ends of the compression spring (20207) abut against the positioning frame (20204) and the moving platform (20202) respectively. When the pulley (20205) moves along the inclined surface, the compression spring (20207) undergoes compression deformation.

7. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, Two sets of dust covers (201) are installed between the two mine car tracks. The dust cover (201) is rotatably connected to the concrete base under the ground through a torsion spring shaft. The dust cover (201) is located directly above the impact mitigation structure. When the dust cover (201) is closed, it covers the upper part of the impact mitigation structure to block external dust and debris.

8. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, The rope buckle (104) includes a fixed buckle frame (10401), which is assembled with the vertical moving plate (103) by means of bolts. Multiple cut plates (10402) are fixedly connected to the force-bearing side of the fixed buckle frame (10401). Cut grooves (10403) are opened on the side of the cut plate (10402) facing away from the force-bearing side. The mine car intercepting cable (105) is placed in the annular hole formed by the fixed buckle frame (10401) and the cut plate (10402).

9. The emergency stopping device for mine cars in mining tunnels according to claim 1, characterized in that, A vertical guide rail (102) is fixed inside the support frame (101). The vertical moving plate (103) is slidably engaged with the vertical guide rail (102) by a slider. The vertical moving plate (103) moves vertically along the vertical guide rail (102). An electric unhooking device (107) is mounted on the support frame (101). A connecting plate (106) is fixed at the corresponding position of the vertical moving plate (103) and the electric unhooking device (107). The connecting plate (106) is hooked onto the electric unhooking device (107) for the suspension and positioning of the vertical moving plate (103).

10. The emergency stopping device for mine cars in mining tunnels according to claim 9, characterized in that, A winch (108) is installed on the upper part of the support frame (101). The traction rope of the winch (108) is connected to the connecting plate (106). The winch (108) winds up and unwinds the rope to drive the connecting plate (106) and the vertical moving plate (103) to move up and down along the vertical guide rail (102).

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