Cross-belt roof cutting drill rig for coal mine

Abstract

The application discloses a coal mine cross-belt roof cutting drilling rig and relates to the technical field of coal mine equipment. The coal mine cross-belt roof cutting drilling rig comprises a supporting assembly, a first sliding table, a second sliding table and a caterpillar wheel. The caterpillar wheel is arranged below the supporting assembly. The second sliding table is provided in two groups, and the two groups of second sliding tables are arranged at the two ends of the first sliding table, respectively. The first sliding table can lift the height of the device and move the second sliding table outward and deeper when the device is used to cut the roof of the area above the belt conveyor. The second sliding table can adjust the horizontal position of the drilling machine, so that the drilling machine can move to the area above the belt conveyor, thereby realizing the cutting of the roof of the area above the belt conveyor without removing the belt conveyor, achieving cross-belt operation, effectively improving the production efficiency and reducing the labor intensity.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment technology, and in particular to a cross-belt roof cutting drilling rig for coal mines. Background Technology

[0002] The coal mine roof cutting drill is a new generation of tracked drilling equipment for roof cutting in roadways. It is mainly used for the construction of blasting holes and other engineering holes in coal mines using automatic roadway forming technology for roof cutting and decompression. It is suitable for various coal seams and rock formations with a rock firmness coefficient of f10.

[0003] A hydraulic drilling rig for coal mines, with publication number CN105422001A, includes a main frame, a traveling unit, two drilling rigs, a hydraulic pump station, and an electrical control system. The main frame has a left drilling rig upright plate and a right drilling rig upright plate on both sides. The rig is characterized by: a drilling rig rotation mechanism for driving the drilling rig to rotate, a lateral movement mechanism for driving the drilling rig to move laterally, and / or a swing mechanism for driving the drilling rig to swing forward and backward. The drilling rig rotation mechanism, lateral movement mechanism, and swing mechanism respectively achieve the following: ensuring the drilling angle meets technical requirements; adjusting the drilling position when the drilling rig is not parked correctly; and adjusting the drilling angle when the drilling rig is on a slope. This drilling rig has poor stability, is difficult to operate, and is not suitable for use under various working conditions.

[0004] However, in actual use, it was found that its positioning structure is relatively simple and can only achieve small-scale drilling positioning. It often requires moving the entire drilling rig to achieve accurate positioning, which greatly reduces the efficiency of construction. Since there are usually belt conveyors inside coal mines, when cutting the roof above the belt conveyor, the belt conveyor needs to be dismantled, which is a complicated process. Moreover, during the operation, the position between the drilling rig and the drilling vehicle needs to be adjusted, which can easily cause the overall center of gravity of the device to change and may cause it to tip over.

[0005] The above technical solution increases the cutting range of the device by setting up an adjustable drilling rig. However, in actual use, the spatial position adjustment range of the drilling rig is limited, and the belt conveyor still needs to be removed.

[0006] Meanwhile, when the position of the drilling rig is adjusted in any direction, the center of gravity of the entire device will change. However, existing technologies lack the function of gravity balancing for the device, which can easily cause the device to tilt, reducing its stability and balance.

[0007] When a coal mine experiences shaking and collapse, existing equipment lacks overall protection for the equipment, especially the drilling rig, thus reducing the safety and protection of the equipment and causing significant safety and economic losses.

[0008] Therefore, it is necessary to invent a cross-belt roof cutting drilling rig for coal mines to solve the above problems. Summary of the Invention

[0009] The purpose of this invention is to provide a cross-belt roof cutting drilling rig for coal mines to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a cross-belt roof cutting drilling rig for coal mines, comprising a support assembly, a primary slide, a secondary slide, and track wheels. The track wheels are disposed below the support assembly. Two sets of secondary slides are provided, and the two sets of secondary slides are respectively disposed at both ends of the primary slide. The primary slide is disposed above the support assembly.

[0011] The support assembly includes a support frame, and a fixing frame is provided at the bottom end of the support frame, and the fixing frame is fixedly installed above the track wheel;

[0012] The primary slide includes a movable frame, which is positioned above the support frame;

[0013] The secondary slide includes a movable cover, which is located at one end of the movable frame.

[0014] Preferably, the movable cover is provided with a lifting cylinder inside, the top of the outer side wall of the movable cover is provided with a movable seat via a hinge, the bottom of one side of the movable cover is provided with an extension seat, the outer side wall of the extension seat is provided with a rotating cylinder via a pin, and one end of the rotating cylinder is movably set at one end of the outer side wall of the extension seat via a pin.

[0015] Preferably, one end of the movable seat is provided with a sleeve, one end of the sleeve is provided with a mounting seat, and a drilling rig is provided on one side of the mounting seat.

[0016] Preferably, the inner walls on both sides of the fixed frame are provided with slide rails, one end of the slide rail is provided with a lifting cylinder, one end of the lifting cylinder is provided with a slide block, and the slide block is located inside the slide rail. The top of the slide block is movably provided with a support arm through a pin, and the top of the support arm is movably provided with the lower surface of the movable frame through a pin.

[0017] The movable frame is provided with positioning rods at the four corners of its lower surface, and the positioning rods are inserted into the inside of the support frame.

[0018] Preferably, the upper surface of the movable frame is provided with fixed seats at both ends, a slot is provided through the middle of the fixed seat, a movable column is provided through the inside of the slot, a support is provided at one end of the movable column, and the support is located at the bottom of the movable cover. A push cylinder is provided on one side of the fixed seat, and one end of the push cylinder is fixedly located on the inner side wall of the support.

[0019] Preferably, a rack is embedded in the lower surface of the movable column, a transmission gear is provided below the rack, a support rod is provided in the middle of the transmission gear, and the support rod is movably disposed inside the movable frame through a bearing.

[0020] Preferably, one end of the support rod is provided with a worm gear, one side of the worm gear is provided with a worm wheel, both ends of the worm wheel are provided with support plates, and the support plates are fixedly installed inside the movable frame.

[0021] Preferably, a bushing is provided through the middle of the worm gear, a hexagonal shaft is provided through the inside of the bushing, a drive sprocket is provided at the bottom end of the hexagonal shaft, and the drive sprocket is located inside the support frame. One end of the drive sprocket is connected to the bottom end of the hexagonal shaft through a bevel gear set.

[0022] Preferably, a driven sprocket is provided on one side of the driving sprocket, and a transmission chain is provided between the driving sprocket and the driven sprocket. A counterweight is provided below the transmission chain and is located inside the fixed frame. The upper surface of the counterweight is provided with protruding teeth, and the protruding teeth mesh with the transmission chain.

[0023] Preferably, a support cylinder is provided at each of the four corners of the support frame.

[0024] The technical effects and advantages of this invention are as follows:

[0025] 1. This invention features a support assembly with a primary slide above it and secondary slides at both ends. A drilling rig is mounted at one end of each secondary slide. When the device is performing a top-cutting operation on the area above the belt conveyor, the primary slide can raise the height of the device and push the secondary slides outwards. The secondary slides can adjust the horizontal position of the drilling rig to ensure that it can move to the top of the belt conveyor. This allows for top-cutting operations on the area above the belt conveyor without dismantling it, enabling cross-belt operations, effectively improving production efficiency and reducing labor intensity.

[0026] 2. The present invention provides a primary slide, which includes a horizontally sliding support that supports a secondary slide. The primary slide also has a counterweight inside. When the support is pushed out horizontally, the support can drive the counterweight to move in the opposite direction through a transmission chain or other structure to adjust the center of gravity of the device, thereby ensuring the stability of the device.

[0027] 3. The present invention sets up a support component, a primary slide, and a secondary slide. Each of the support component, the primary slide, and the secondary slide is equipped with multiple sets of hydraulic cylinders. The support component, the primary slide, and the secondary slide are all driven by hydraulic cylinders. The power source of the whole device is unified, which facilitates the inspection and maintenance of the device and also makes the operation of the device more convenient.

[0028] 4. This invention, by setting up a magnetic piston block and a magnetic slider, makes the device simple to operate, stable and efficient. It adaptively adjusts the horizontal position and center of gravity of the counterweight block according to the position of the drilling rig, resulting in higher stability, better operability, stronger durability and support, and improved longevity of the device in coal mines. At the same time, when problems such as shaking and collapse occur in the coal mine, the retraction of the magnetic piston block and the flow of gas effectively realize the expansion and protection of the protective airbag, resulting in higher safety and stronger protection. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the primary slide and the secondary slide of the present invention.

[0031] Figure 3 This is a schematic diagram of the support component structure of the present invention.

[0032] Figure 4 This is a schematic diagram of the first-stage slide structure of the present invention.

[0033] Figure 5 This is a schematic diagram of the counterweight structure of the present invention.

[0034] Figure 6 This is a bottom view of the two-stage slide structure of the present invention.

[0035] Figure 7 This is a schematic diagram of the transmission chain structure of the present invention.

[0036] Figure 8 This is a schematic diagram of the hexagonal shaft structure of the present invention.

[0037] Figure 9 This is a schematic diagram of the two-stage slide structure of the present invention.

[0038] Figure 10 A horizontal structural diagram is provided to illustrate the overall structure of this invention.

[0039] Figure 11 This is a schematic diagram of the overall structure of the present invention operating across a belt conveyor.

[0040] Figure 12 This is a cross-sectional schematic diagram of the counterweight block according to the second embodiment of the present invention.

[0041] Figure 13 This is a cross-sectional schematic diagram of the sleeve according to the second embodiment of the present invention.

[0042] In the diagram: 1. Support assembly; 2. Primary slide; 3. Secondary slide; 4. Track wheel; 101. Support frame; 102. Fixed frame; 103. Slide rail; 104. Lifting cylinder; 105. Slide block; 106. Support arm; 107. Support cylinder; 201. Movable frame; 202. Positioning rod; 203. Fixed seat; 204. Slot; 205. Movable column; 206. Support; 207. Propulsion cylinder; 208. Rack; 209. Transmission gear; 210. Support rod; 211. Worm gear; 212. Worm wheel; 213. Support plate; 214. Bushing; 21 5. Hexagonal shaft; 216. Drive sprocket; 217. Bevel gear set; 218. Driven sprocket; 219. Transmission chain; 220. Counterweight; 221. Convex tooth; 222. Protective airbag; 223. Hose; 224. Inner cavity; 225. Magnetic piston block; 226. Retracting groove; 227. Connecting spring; 228. Exhaust port; 301. Movable cover; 302. Lifting cylinder; 303. Movable seat; 304. Extension seat; 305. Rotary cylinder; 306. Sleeve; 307. Mounting seat; 308. Drilling rig; 309. Magnetic slider; 310. Horizontal cylinder. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] First Embodiment

[0045] This invention provides, for example Figures 1 to 11 The coal mine cross-belt roof cutting drilling rig shown includes a support assembly 1, a primary slide 2, a secondary slide 3, and track wheels 4. The track wheels 4 are located below the support assembly 1. There are two sets of secondary slides 3, which are respectively located at both ends of the primary slide 2. The primary slide 2 is located above the support assembly 1. The support assembly 1 mainly provides support. The primary slide 2 and the secondary slide 3 adjust the position of the drilling rig 308. The track wheels 4 improve the mobility of the device.

[0046] The support assembly 1 includes a support frame 101, with a fixed frame 102 at the bottom of the support frame 101, and the fixed frame 102 is positioned above the track wheel 4. Both inner walls of the fixed frame 102 are provided with slide rails 103. A lifting cylinder 104 is provided at one end of each slide rail 103. A sliding block 105 is provided at one end of the lifting cylinder 104, and the sliding block 105 is located inside the slide rail 103. A support arm 106 is movably mounted on the top of the sliding block 105 via a pin, and the top of the support arm 106 is also movably mounted on a pin. The lifting cylinder 104 is located on the lower surface of the movable frame 201. It drives the slide block 105 to move, so that the slide block 105 slides horizontally within the slide rail 103. During the sliding process, the slide block 105 can drive the support arm 106 to move, so that the support arm 106 lifts the movable frame 201 upward, thereby lifting the first-stage slide 2. Since the lifting cylinder 104 is set as a horizontal structure, the impact of the bottom end of the lifting cylinder 104 on the track wheel 4 can be reduced, which can ensure the lifting effect of the device.

[0047] Support cylinders 107 are provided at the four corners of the support frame 101. The support cylinders 107 can be pressed against the ground or top of the working area to achieve auxiliary fixation of the device position.

[0048] The primary slide 2 includes a movable frame 201, which is located above the support frame 101. The four corners of the lower surface of the movable frame 201 are provided with positioning rods 202, which are inserted into the inside of the support frame 101. The positioning rods 202 mainly play the role of positioning and sliding.

[0049] The upper surface of the movable frame 201 is provided with fixed seats 203 at both ends. A slot 204 is provided through the middle of the fixed seat 203. A movable column 205 is provided through the inside of the slot 204. A support 206 is provided at one end of the movable column 205. The support 206 is located at the bottom of the movable cover 301. A push cylinder 207 is provided on one side of the fixed seat 203. One end of the push cylinder 207 is fixedly located on the inner side wall of the support 206. The push cylinder 207 can drive the support 206 to slide horizontally to realize the ejection of the secondary slide 3.

[0050] Furthermore, a rack 208 is inlaid on the lower surface of the movable column 205, a transmission gear 209 is provided below the rack 208, a support rod 210 is provided in the middle of the transmission gear 209, and the support rod 210 is movably set inside the movable frame 201 through a bearing. The movement of the gear 208 drives the transmission gear 209 to rotate, and the rotation of the transmission gear 209 drives the support rod 210 to rotate.

[0051] Furthermore, one end of the support rod 210 is provided with a worm 211, one side of the worm 211 is provided with a worm wheel 212, and both ends of the worm wheel 212 are provided with support plates 213. The support plates 213 are fixedly installed inside the movable frame 201. The worm 211 and the worm wheel 212 can achieve a self-locking effect while realizing the transmission effect, so as to lock the position of the counterweight 220.

[0052] Meanwhile, a bushing 214 is provided through the middle of the worm gear 212, and a hexagonal shaft 215 is provided through the inside of the bushing 214. The bottom end of the hexagonal shaft 215 is provided with a drive sprocket 216, and the drive sprocket 216 is located inside the support frame 101. One end of the drive sprocket 216 is connected to the bottom end of the hexagonal shaft 215 through a bevel gear set 217. The hexagonal shaft 215 can slide inside the bushing 214. When the position between the first-stage slide 2 and the support assembly 1 changes, the hexagonal shaft 215 and the bushing 214 can always maintain the transmission effect.

[0053] Furthermore, a driven sprocket 218 is provided on one side of the driving sprocket 216, and a transmission chain 219 is provided between the driving sprocket 216 and the driven sprocket 218. A counterweight 220 is slidably connected inside the fixed frame 102. The upper surface of the counterweight 220 is provided with protruding teeth 221, and the protruding teeth 221 mesh with the transmission chain 219. The transmission chain 219 can drive the counterweight 220 to slide through the protruding teeth 221, so as to adjust the center of gravity of the device.

[0054] The secondary slide 3 includes a movable cover 301, which is located at one end of the movable frame 201. The movable cover 301 is equipped with a lifting cylinder 302 inside. The lifting cylinder 302 is fixedly installed above the support 206. The lifting cylinder 302 can be used to lift the secondary slide 3 again to facilitate the top cutting operation.

[0055] More specifically, a movable seat 303 is movably mounted on the top of the outer wall of the movable cover 301 via a hinge, and an extension seat 304 is provided on one bottom side of the movable cover 301. A rotary cylinder 305 is movably mounted on the outer wall of the extension seat 304 via a pin, and one end of the rotary cylinder 305 is movably mounted on one end of the outer wall of the extension seat 304 via a pin. The rotary cylinder 305, the movable cover 301, and the movable seat 303 form a triangular structure. When the rotary cylinder 305 is pushed out, the length of one side of the triangular structure changes. At this time, the movable seat 303 can rotate around the pin to adjust the position of the drilling rig 308.

[0056] Furthermore, one end of the movable seat 303 is provided with a sleeve 306, the inner wall of the sleeve 306 is provided with a horizontal hydraulic cylinder 310, the output end of the horizontal hydraulic cylinder 310 is provided with a magnetic slider 309, the other end of the magnetic slider 309 is fixedly connected to the side wall of the movable seat 303, the horizontal hydraulic cylinder 310 can realize the longitudinal extension of the drill 308 to facilitate the top cutting operation, one end of the sleeve 306 is provided with a mounting seat 307, one side of the mounting seat 307 is provided with a drill 308, the drill 308 and the mounting seat 307 are connected by a pin shaft and locked by bolts and other fasteners, the angle between the drill 308 and the mounting seat 307 can be adjusted to adjust the inclination angle of the drill 308 according to the actual situation of the top cutting area.

[0057] When this device is in use, it first moves to the designated area via the track wheels 4 when performing roof cutting operations above the conveyor belt. Then, the device position is fixed by the support assembly 1, and the height of the primary slide 2 and the secondary slide 3 is raised by the support assembly 1 to adjust the height of the drilling rig 308. At the same time, the secondary slide 3 is pushed outward by the primary slide 2 to adjust the horizontal position of the drilling rig 308. Then, the drilling rig 308 is pushed out longitudinally by the secondary slide 3, so that the drilling rig 308 moves to the roof cutting area above the conveyor belt, where the roof cutting operation can be performed.

[0058] When the first-stage slide 2 is lifted by the support assembly 1, the lifting cylinder 104 drives the slide block 105 to move, so that the slide block 105 slides horizontally within the slide rail 103. During the sliding process, the slide block 105 can drive the support arm 106 to move, so that the support arm 106 pushes the movable frame 201 upward, thereby lifting the first-stage slide 2. Since the lifting cylinder 104 is set as a horizontal structure, the impact of the bottom end of the lifting cylinder 104 on the track wheel 4 can be reduced, which can ensure the lifting effect of the device.

[0059] When the secondary slide 3 is pushed outward by the primary slide 2, the propulsion cylinder 207 drives the support 206 to move, causing the support 206 to move horizontally. The support 206 drives the movable column 205 to move, the movable column 205 drives the rack 208 to slide horizontally, the rack 208 drives the transmission gear 209 to rotate, the transmission gear 209 drives the support rod 210 to rotate, the support rod 210 drives the worm 211 to rotate, the worm 211 drives the worm wheel 212 to rotate, the worm wheel 212 drives the hexagonal shaft 215 to rotate through the bushing 214, the hexagonal shaft 215 drives the drive sprocket 216 to rotate through the bevel gear set 217, and the drive sprocket 216 drives the transmission chain 219 to rotate. The transmission chain 219 drives the counterweight 220 to slide horizontally through the convex tooth 221, so that the counterweight 220 moves in the opposite direction to the support 206, thereby achieving the function of adjusting the center of gravity of the device.

[0060] When adjusting the position of the drilling rig 308 via the secondary slide 3, the rotary cylinder 305 drives one end of the movable seat 303 to move, causing the movable seat 303 to rotate around the pin. The movable seat 303 can drive the mounting seat 307 to move via the sleeve 306, causing the mounting seat 307 to move longitudinally. This causes the drilling rig 308 to move longitudinally above the belt conveyor. Then, the angle of the drilling rig 308 is adjusted to ensure that the drilling rig 308 is perpendicular to the cutting area, and the drilling rig 308 is locked to the mounting seat 307, at which point the cutting operation can be carried out.

[0061] Second Embodiment

[0062] like Figure 12 and Figure 13 As shown, when drilling in a coal mine using the drilling rig 308, the center of gravity of the entire device changes as the position of the drilling rig 308 changes. Since the counterweight 220 can only move horizontally within the fixed frame 102, it affects the accuracy of the counterweight of the drilling rig 308 and ultimately reduces the stability of the device. Furthermore, when the drilling rig 308 is in operation and there is a possibility of collapse due to the shaking of the coal mine, the existing technology lacks overall protection for the device, especially the drilling rig 308, thereby reducing the safety and protection of the device.

[0063] To address the aforementioned issues, the coal mine cross-belt roof cutting drilling rig also includes: a protective airbag 222 at the bottom of the counterweight 220, the protective airbag 222 primarily serving a protective function, with its expansion direction directly facing the end of the secondary slide 3; an inner cavity 224 inside the counterweight 220, with a magnetic piston block 225 slidably connected inside the inner cavity 224; the magnetic piston block 225 changes the center of gravity position of the counterweight 220 as it slides within the inner cavity 224; a cutter retraction groove 226 is located on the side of the inner cavity 224 away from the secondary slide 3, the cutter retraction groove 226 primarily serving a cutter retraction function; when the magnetic piston block 225 moves to the position of the cutter retraction groove 226, the magnetic repulsion force exerted by the magnetic slider 309 on the magnetic piston block 225 drives the magnetic piston block 225 to move to the retraction groove 226. The tool retraction occurs inside the tool groove 226. The bottom of the inner cavity 224 is provided with an exhaust hole 228. The other end of the exhaust hole 228 is connected to the protective air bag 222. When the magnetic piston block 225 moves into the tool retraction groove 226, the exhaust hole 228 is opened. The gas flowing inside the inner cavity 225 enters the protective air bag 222 along the exhaust hole 228. The protective air bag 222 increases in volume and expands towards the end of the secondary slide 3. The protective air bag 222 then wraps and protects the secondary slide 3. A flexible hose 223 is connected to one side of the inner cavity 224. The other end of the flexible hose 223 is connected to the inside of the sleeve 306. When the magnetic piston block 225 slides inside the inner cavity 224, the gas inside the inner cavity 224 flows through the flexible hose 223 and the inside of the sleeve 306.

[0064] The inner cavity 224 is equipped with circulating gas. A connecting spring 227 is located on the side of the magnetic piston block 225 away from the hose 223. The other end of the connecting spring 227 is fixedly connected to the side wall of the inner cavity 224. The connecting spring 227 improves the elastic reset performance of the magnetic piston block 225. The magnetic piston block 225 matches the magnetic slider 309. When the magnetic slider 309 retracts to its maximum extent and rotates to its initial position, the magnetic slider 309 matches the magnetic piston block 225. The magnetic repulsion force of the magnetic slider 309 on the magnetic piston block 225 drives the magnetic piston block 225 to move into the tool retraction groove 226 for tool retraction. The width of the tool retraction groove 226 matches the width of the magnetic piston block 225. An elastic block is located inside the tool retraction groove 226. When the magnetic slider 309 moves away, the elastic force of the elastic block drives the magnetic piston block 225 to reset along the tool retraction groove 226. The inner wall of sleeve 306 is sealed and slidably connected. The hose 223 is connected to the end of sleeve 306 away from the magnetic slider 309. This arrangement further realizes the flow of gas in sleeve 306 and inner cavity 224. Magnetic piston block 225 matches exhaust port 228. When magnetic piston block 225 slides inside inner cavity 224, it can block exhaust port 228. When magnetic piston block 225 enters the knife relief groove 226, it unblocks exhaust port 228. Gas inside inner cavity 224 enters protective airbag 222 along exhaust port 228. Protective airbag 222 increases in volume and expands to wrap and protect the entire device. At the same time, the expansion direction of protective airbag 222 is hemispherical, that is, when the volume of protective airbags 222 on both sides increases, they will spherically wrap the internal device, thereby achieving complete wrapping and protection.

[0065] In use, as shown in the first embodiment, the device is moved to a suitable position by means of the track wheels 4, and the device is plugged and fixed by means of the support cylinder 107. Then, the push cylinder 207 is started and drives the movable column 205 to move laterally. When the movable column 205 moves, it not only drives the drilling rig 308 to move in the left and right directions, but also drives the counterweight block 220 to move in the left and right directions by means of the rack 208 and the transmission gear 209, which further improves the stability of the device and ensures the safe and efficient operation of the device.

[0066] When the drilling rig 308 needs to move back and forth for position adjustment, the horizontal cylinder 310 is activated and drives the magnetic slider 309 to move outward inside the sleeve 306. As a result, the internal space of the sleeve 306 increases and the pressure decreases. Under the action of negative pressure, the gas flowing inside the inner cavity 224 moves along the hose 223 to the inside of the sleeve 306. The pressure inside the inner cavity 224 gradually decreases. The magnetic piston block 225 stretches the connecting spring 227 inside the inner cavity 224 and moves it closer to the end of the hose 223. However, at this time, the magnetic piston block 225 still blocks the exhaust hole 228, and the gas inside the inner cavity 224 cannot be discharged into the protective airbag 222 along the exhaust hole 228.

[0067] As the magnetic piston block 225 moves inside the inner cavity 224, the magnetic piston block 225 causes the center of gravity of the counterweight block 220 to shift, and the direction of the shift is opposite to the direction of movement of the drilling rig 308. Thus, the magnetic piston block 225 ensures the stability and safety of the drilling rig 308, and prevents the device from shifting or tilting when the drilling rig 308 moves back and forth, thereby reducing the safety and stability of the device.

[0068] When a collapse or vibration occurs inside the coal mine, to ensure the safety and integrity of the device, the horizontal cylinder 310 is activated and retracts. The horizontal cylinder 310 drives the magnetic slider 309 at the output end to retract along the sleeve 306. Simultaneously, the magnetic slider 309 retracts, driving the drilling rig 308 to move towards the support assembly 1 to its maximum value. The gas flowing inside the sleeve 306 moves in the opposite direction along the hose 223 to the inner cavity 224. The volume of the gas flowing inside the inner cavity 224 increases, driving the magnetic piston block 225 to move in the opposite direction to its maximum distance. The magnetic piston block 225 matches the cutter retraction groove 226. At the same time, the rotary cylinder 305 is activated and retracts to its maximum distance. Simultaneously, the rotary cylinder 305 retracts, driving the movable seat 303 to rotate to its maximum angle. The movable seat 303 drives the magnetic slider 309 to rotate from a horizontal state to a vertically downward state. The magnetic slider 309 moves downward to its maximum angle, matching the magnetic piston block 225. At this time, the magnetic repulsion force of the magnetic slider 309 on the magnetic piston block 225 drives the magnetic piston block 225 to move away from the magnetic slider 309. The magnetic piston block 225 squeezes the elastic block and enters the retraction groove 226 to retract the blade. At this time, the magnetic piston block 225 is released from the blockage of the exhaust hole 228. The circulating gas inside the inner cavity 224 is quickly discharged into the protective airbag 222 along the exhaust hole 228. The protective airbag 222 increases in volume and continues to expand. The other end of the protective airbag 222 wraps around the drilling rig rear 308 and wraps upward for protection, thereby effectively protecting the internal structure of the device, improving the safety and stability of the device, and preventing ore and other materials inside the coal mine from falling onto the top of the device and causing a safety accident.

[0069] Once the device is no longer in operation due to the coal mine collapse, it is only necessary to remove the protective airbag 222 and replace it with a new one. At the same time, the internal cavity 224 and the sleeve 306 are refilled with circulating gas, and the entire device returns to normal operation. The above process is then repeated to perform roof cutting and drilling work in the coal mine.

[0070] The device is simple to operate, stable and efficient. It adaptively adjusts the horizontal position and center of gravity of the counterweight 220 according to the position of the drilling rig 308, resulting in higher stability, better operability, stronger durability and support, and improved long-term use of the device in coal mines. At the same time, when problems such as shaking and collapse occur in the coal mine, the expansion of the protective airbag 222 is effectively realized by the retraction of the magnetic piston block 225 and the flow of gas, which provides higher safety and stronger protection.

[0071] 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 cross-belt roof cutting drilling rig for coal mines, characterized in that, It includes a support assembly (1), a primary slide (2), a secondary slide (3), and track wheels (4); The support component (1) includes a support frame (101), and a fixing frame (102) is provided at the bottom end of the support frame (101). The first-stage slide (2) includes a movable frame (201), which is located above the support frame (101). A counterweight (220) is slidably connected inside the fixed frame (102), and the upper surface of the counterweight (220) is provided with protruding teeth (221). The counterweight (220) has a protective airbag (222) at its bottom and an inner cavity (224) inside. A magnetic piston block (225) is slidably connected inside the inner cavity (224). A knife-removal groove (226) is provided on the side of the inner cavity (224) away from the secondary slide (3). An exhaust hole (228) is provided at the bottom of the inner cavity (224). The other end of the exhaust hole (228) is connected to the protective airbag (222). A flexible hose (223) is connected to one side of the inner cavity (224). The secondary slide (3) includes a movable cover (301), inside which is provided a lifting cylinder (302). The top of the outer side wall of the movable cover (301) is provided with a movable seat (303) via a hinge. One end of the movable seat (303) is provided with a sleeve (306). The inner wall of the sleeve (306) is provided with a horizontal cylinder (310). The output end of the horizontal cylinder (310) is provided with a magnetic slider (309). The other end of the magnetic slider (309) is fixedly connected to the side wall of the movable seat (303). The other end of the hose (223) is connected to the inside of the sleeve (306). The inner cavity (224) is provided with circulating gas. The magnetic piston block (225) is provided with a connecting spring (227) on the side away from the hose (223). The other end of the connecting spring (227) is fixedly connected to the side wall of the inner cavity (224). The magnetic piston block (225) is matched with the magnetic slider (309). The width of the knife relief groove (226) is matched with the width of the magnetic piston block (225). The knife relief groove (226) is provided with an elastic block. The magnetic slider (309) is sealed and slidably connected to the inner wall of the sleeve (306). The hose (223) is connected to the end of the sleeve (306) away from the magnetic slider (309). The magnetic piston block (225) is matched with the exhaust hole (228).

2. The coal mine cross-belt roof cutting drilling rig according to claim 1, characterized in that: The track wheel (4) is located below the support assembly (1). There are two sets of secondary slides (3), and the two sets of secondary slides (3) are respectively located at both ends of the primary slide (2). The primary slide (2) is located above the support assembly (1).

3. The coal mine cross-belt roof cutting drilling rig according to claim 1, characterized in that: The movable cover (301) is located at one end of the movable frame (201). An extension seat (304) is provided at the bottom of one side of the movable cover (301). A rotary cylinder (305) is movably provided on the outer side wall of the extension seat (304) via a pin. One end of the rotary cylinder (305) is movably provided on one end of the outer side wall of the extension seat (304) via a pin. A mounting seat (307) is provided at one end of the sleeve (306). A drilling rig (308) is provided on one side of the mounting seat (307).

4. The coal mine cross-belt roof cutting drilling rig according to claim 1, characterized in that: The inner walls on both sides of the fixed frame (102) are provided with slide rails (103). One end of the slide rail (103) is provided with a lifting cylinder (104). One end of the lifting cylinder (104) is provided with a slide block (105). The slide block (105) is located inside the slide rail (103). The top of the slide block (105) is provided with a support arm (106) through a pin. The top of the support arm (106) is provided with a support arm (106) through a pin on the lower surface of the movable frame (201).

5. The coal mine cross-belt roof cutting drilling rig according to claim 1, characterized in that: The movable frame (201) has positioning rods (202) at the four corners of its lower surface. The positioning rods (202) are inserted into the support frame (101). The movable frame (201) has fixed seats (203) at both ends of its upper surface. The fixed seat (203) has a slot (204) through its middle. The slot (204) has a movable column (205) through its interior. One end of the movable column (205) has a support (206). The support (206) is located at the bottom of the movable cover (301). One side of the fixed seat (203) has a propulsion cylinder (207). One end of the propulsion cylinder (207) is fixed to the inner wall of the support (206).

6. The coal mine cross-belt roof cutting drilling rig according to claim 5, characterized in that: The lower surface of the movable column (205) is inlaid with a rack (208), and a transmission gear (209) is provided below the rack (208). A support rod (210) is provided in the middle of the transmission gear (209), and the support rod (210) is movably set inside the movable frame (201) through a bearing.

7. The coal mine cross-belt roof cutting drilling rig according to claim 6, characterized in that: One end of the support rod (210) is provided with a worm (211), and one side of the worm (211) is provided with a worm wheel (212). Both ends of the worm wheel (212) are provided with support plates (213), and the support plates (213) are fixedly installed inside the movable frame (201).

8. The coal mine cross-belt roof cutting drilling rig according to claim 7, characterized in that: A bushing (214) is provided through the middle of the worm gear (212), and a hexagonal shaft (215) is provided through the inside of the bushing (214). A drive sprocket (216) is provided at the bottom end of the hexagonal shaft (215). The drive sprocket (216) is located inside the support frame (101). One end of the drive sprocket (216) is connected to the bottom end of the hexagonal shaft (215) through a bevel gear set (217). A driven sprocket (218) is provided on one side of the drive sprocket (216). A transmission chain (219) is provided between the drive sprocket (216) and the driven sprocket (218). The convex tooth (221) meshes with the transmission chain (219).

9. The coal mine cross-belt roof cutting drilling rig according to claim 1, characterized in that: The fixed frame (102) is located above the track wheel (4), and the support frame (101) is provided with support cylinders (107) at each of its four corners.

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