Dredging device and coal mine underground sump dredging system

Abstract

The utility model provides a kind of dredging device and coal mine underground sump dredging system, and the dredging device includes: driving component and dredging vehicle body, driving component is set on track, and driving component is movably set along preset track path relative to track;Dredging vehicle body is movably set on driving component, and dredging vehicle body is located at the bottom of driving component, and dredging vehicle body is used to clean silt in sump;Dredging vehicle body has silt collecting part and buffer part, and silt collecting part and buffer part are movably set, silt collecting part is used to collect silt, buffer part is spaced apart from silt collecting part, and at least part of buffer part is below silt collecting part.The dredging device can effectively solve the track hanging dredging device in the prior art, to prevent the collision between dredging vehicle body and sump bottom, when dredging device is working, the bottom of vehicle body needs to maintain a certain distance from the bottom of sump, which leads to unable to completely close to the bottom, thereby causing the technical problem of silt remaining in bottom area.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mining equipment, specifically to a dredging device and a coal mine underground water tank dredging system. Background Technology

[0002] Water sump is an important underground channel in coal mines used to collect and store gushing water, and also functions as a sedimentation tank for wastewater. It is a key facility for ensuring safe production in coal mines and preventing underground flooding. Water gushing during tunnel excavation and coal mining operations typically flows into the water sump through ditches or pipeline systems. However, this water often carries a large amount of coal dust, rock particles, and other debris. After entering the water sump, these solid particles gradually settle and accumulate, forming silt. The continuous accumulation of silt not only significantly reduces the effective water storage capacity of the water sump, affecting its regulation capacity, but also causes the hard particles to enter the central drainage system during the drainage process, leading to accelerated wear on critical components such as pump impellers and pipeline valves, shortening equipment lifespan, increasing maintenance costs, and increasing the risk of failure.

[0003] To ensure the normal operation of the water tank and the stability and reliability of the central drainage system, it is essential to regularly clean the internal silt. Currently, silt removal is still mainly done manually, with workers entering the water tank to remove the silt using shovels, scrapers, and other tools. This method is labor-intensive, involves harsh working conditions, is inefficient, poses significant safety risks, and severely consumes human resources and production time.

[0004] Although two mechanized dredging methods, namely bottom surface dredging vehicles and track dredging devices, exist, they still have significant limitations: Bottom sludge removal vehicles drive into the interior of the water tank to carry out operations. However, the vehicles and their towed hydraulic pipelines and cables are immersed in the muddy water environment for a long time, which can easily cause electrical short circuits, hydraulic leaks and mechanical corrosion. As a result, the equipment has poor reliability and it is difficult to achieve efficient, stable and automated continuous operation.

[0005] As an emerging technology, the track-mounted dredging device lowers the dredging vehicle below the water tank surface for dredging, allowing only the actuators to contact the mud and water, thus avoiding the entire vehicle wading through water, which is quite advanced. However, this technology still faces a key design challenge: because the dredging vehicle is suspended inside the water tank by a suspension mechanism, a certain safety distance must be maintained between the bottom of the vehicle and the bottom of the water tank to prevent damage from collisions during movement or lifting. This structural limitation may prevent the dredging device from fully approaching the bottom of the water tank, making it difficult to effectively disturb and collect the bottom silt, thus forming a residual silt layer. If this problem is not effectively solved, it may affect the thoroughness and overall efficiency of dredging operations in practical applications—the long-term accumulation of residual silt will not only continuously encroach on the effective volume of the water tank, weakening its storage capacity, but may also be disturbed again by the water flow during drainage and carried into the central drainage system, aggravating the wear and tear on key equipment such as pumps, pipelines, and valves, threatening the long-term stable operation of the drainage system.

[0006] Therefore, existing technologies still need further development. Utility Model Content

[0007] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a dredging device and a coal mine underground water tank dredging system to solve the technical problem in the existing track-suspended dredging device that, in order to prevent the dredging vehicle body from colliding with the bottom of the water tank, requires the bottom of the dredging device to maintain a certain distance from the bottom of the tank during operation, which results in the inability to fully approach the bottom, thus causing sludge residue in the bottom area.

[0008] To achieve the above-mentioned technical objectives, according to one aspect of the present invention, a dredging device is provided, comprising: a driving component and a dredging vehicle body. The driving component is mounted on a track and is movably mounted relative to the track along a preset track path. The dredging vehicle body is movably mounted on the driving component and is located at the bottom of the driving component. The dredging vehicle body is used to clean sludge in a water tank. The dredging vehicle body has a sludge collecting section and a buffer section, both of which are movably mounted. The sludge collecting section is used to collect sludge, and the buffer section is spaced apart from the sludge collecting section, with at least a portion of the buffer section located below the sludge collecting section. When the dredging vehicle body approaches the bottom surface of the water tank, the buffer section first contacts the bottom surface of the water tank, and upon contact, the buffer section moves, causing a portion of the sludge collecting section to adhere to the bottom surface of the water tank.

[0009] Furthermore, the dredging vehicle body includes: a frame; a sludge pump, mounted on the frame, for pumping sludge; a spiral sludge collection assembly, rotatably mounted on the frame and located on the side of the frame facing the target dredging area, for collecting sludge by rotating the spiral sludge collection assembly and pushing the collected sludge to the feed inlet of the sludge pump; a buffer roller, extending along the width direction of the frame, located at the bottom of the frame, and oscillating relative to the frame; the buffer roller and the spiral sludge collection assembly are spaced apart along the length direction of the frame, the buffer roller being located on the side of the frame away from the target dredging area, and at least a portion of the buffer roller being located below the spiral sludge collection assembly.

[0010] Furthermore, the dredging vehicle also includes: a placement frame, which is mounted on the frame and located on the side of the frame away from the target dredging area, and is positioned above the buffer roller; the placement frame has a placement cavity, and a sludge pump is installed inside the placement cavity, with the sludge pump's inlet facing the bottom of the placement cavity; wherein, a sludge inlet communicating with the placement cavity is provided on the side of the frame near the placement frame, and a spiral sludge collection assembly pushes the collected sludge toward the sludge inlet.

[0011] Furthermore, the dredging vehicle also includes a filter plate, which is installed on the sludge inlet and is used to filter the sludge entering the placement chamber.

[0012] Furthermore, the dredging device also includes a winch and a flexible connector. The winch is mounted on the drive unit and is located at the bottom of the drive unit. Part of the flexible connector is wound around the winch, and the free end of the flexible connector is connected to the dredging vehicle body. The winch is used to retract and extend the flexible connector, thereby lowering the dredging vehicle body to the target working position or raising it to a preset parking position above the water surface.

[0013] Furthermore, the dredging device also includes: a first contact member, which is mounted on the flexible connector and located at one end of the flexible connector near the dredging vehicle body; and a first detection member, which is mounted on the drive component and located at the bottom of the drive component. The first detection member is communicatively connected to the winch and is used to detect whether the dredging vehicle body has been raised to a preset parking position, and to control whether the winch stops its winding action based on the detection result. When the first contact member contacts the detection end of the first detection member, the first detection member is triggered to output a stop signal to control the winch to stop its winding action.

[0014] Further, the driving components include: a first traveling assembly and a second traveling assembly, the first traveling assembly being movably mounted on a track along a preset track path; the second traveling assembly being movably mounted on the track along a preset track path, and the second traveling assembly being located at the rear end of the first traveling assembly; the second traveling assembly and the first traveling assembly being connected by a connecting rod; the dredging vehicle body being swingably mounted on the first traveling assembly; a winch and a first detection component being spaced apart on the second traveling assembly, and both the winch and the first detection component being located at the bottom of the second traveling assembly; a third traveling assembly and a stepping drive cylinder, the third traveling assembly being movably mounted on the track along a preset track path, and the third traveling assembly being located at the rear end of the second traveling assembly, the third traveling assembly being connected to the second traveling assembly via the stepping drive cylinder; the first traveling assembly, the second traveling assembly, and the third traveling assembly being coordinated to move by alternating braking of the first traveling assembly's first braking part and the third traveling assembly's third braking part, and in conjunction with the extension and retraction drive of the stepping drive cylinder.

[0015] Furthermore, the dredging device also includes: a movable rod, which is mounted on the frame and located on the side of the frame away from the target dredging area, extending along the height direction of the frame; one end of the movable rod is rotatably connected to a buffer roller, so that the movable rod can be moved along the height direction of the frame by the swing of the buffer roller; a second contact member, which is mounted on the end of the movable rod away from the buffer roller; a second detection member, which is mounted on the frame and located above the second contact member, with the detection end of the second detection member facing the second contact member; the second detection member is communicatively connected to a winch, and is used to detect whether the dredging vehicle body has descended to the bottom of the water tank, so as to control whether the winch stops releasing based on the detection result; wherein, when the buffer roller contacts the bottom of the water tank, the buffer roller drives the movable rod and the second contact member to move towards the detection end of the second detection member, so that the second contact member contacts the detection end of the second detection member, thereby triggering the second detection member to output a stop signal, controlling the winch to stop releasing.

[0016] Furthermore, the dredging device also includes: a guide member, which is mounted on the frame and positioned on the side of the frame away from the target dredging area; the guide member has a guide hole extending along the height direction of the frame, and a moving rod passes through the guide hole; a stop member, which is movably mounted on the moving rod along the extension direction of the moving rod and is located below the guide member; and an elastic member, which is sleeved on the moving rod and whose two ends abut against the stop member and the guide member, respectively; the elastic member has a compressed state and an initial state; wherein, when the buffer roller drives the moving rod and the second contact member to move toward the detection end of the second detection member, the elastic member is in a compressed state; when the buffer roller moves away from the bottom surface of the water tank, the self-restoring force of the elastic member drives the moving rod and the second contact member to move away from the second detection member, so that the elastic member returns to its initial state.

[0017] According to another aspect of the present invention: a coal mine underground water tank dredging system is provided, comprising: a dredging device, wherein the dredging device is the aforementioned dredging device.

[0018] Beneficial effects: The dredging device provided by this utility model, using its technical solution, includes: a drive component and a dredging vehicle body. The drive component is suspended on a track and moves relative to the track along a preset track path. The dredging vehicle body, used for cleaning silt in a water tank, is movably mounted on the drive component and located at the bottom of the drive component. The drive component then drives the dredging vehicle body to move along the preset track path, thereby achieving continuous operation of the dredging area of ​​the water tank. Simultaneously, the dredging vehicle body, being movably mounted on the drive component, allows it to move away from or towards the bottom surface of the water tank. The dredging vehicle body has a mud-collecting section and a buffer section, both of which are movably mounted. The mud-collecting section faces the target dredging area and is used to collect silt. The buffer section is spaced apart from the mud-collecting section, with at least a portion of the buffer section located below the mud-collecting section. When the dredging vehicle body approaches the bottom surface of the water tank, the buffer section first contacts the bottom surface of the water tank, and upon contact, the buffer section moves, causing a portion of the mud-collecting section to adhere to the bottom surface of the water tank.

[0019] Therefore, by incorporating a buffer section, during the dredging vehicle's descent, the buffer section acts as a pilot structure, contacting the bottom of the water tank first. Its movable design absorbs impact energy, thus providing cushioning and shock absorption. This mechanism effectively prevents the sludge collection section from wearing down, deforming, or even being damaged due to direct impact with the hard bottom surface, extending the service life of key components and reducing maintenance costs. Furthermore, the buffer section's pre-contact and motion response provide dynamic positioning feedback for the sludge collection section, enabling the entire dredging vehicle to achieve a smooth transition and flexible landing as it approaches the bottom surface, avoiding equipment vibration, deviation, or jamming caused by sudden obstruction. This "probe-then-attach" working mode enhances the system's operational stability, helps maintain a constant dredging depth and uniform sludge flow rate, and improves the controllability and consistency of the operation. Simultaneously, the buffer section's motion response after contacting the bottom surface causes the sludge collection section to adjust its posture, allowing certain areas to automatically conform to the contours of the water tank's bottom surface. Furthermore, due to the movable nature of the buffer section, it can adjust its position in real time according to changes in the bottom surface, thereby causing the sludge collection section to form a partially flush state. Even when the bottom surface is uneven or obstructed, it can still ensure that some sludge collection areas remain close to the ground for effective collection. This allows the sludge collection section to thoroughly remove the sludge layer close to the bottom of the pool, avoiding problems such as hardening, corrosion, or microbial growth caused by long-term accumulation of residues. This helps extend the service life of the water tank and reduce the frequency of subsequent maintenance. More thorough sludge removal also means better results per operation, extending the sludge removal cycle and reducing operating costs. In addition, the drive components are movable along the track, and combined with the automatic lifting and buffering functions of the sludge removal vehicle, the entire system can achieve fully automatic cruise sludge removal through remote control or preset programs. No manual entry into the well or diving is required, greatly improving operational safety. It is particularly suitable for long-term operation and maintenance needs in enclosed spaces, deep water areas, or toxic and hazardous environments. This dredging device effectively solves the technical problem in the existing technology that, in order to prevent the dredging vehicle body from colliding with the bottom of the water tank, the bottom of the dredging device needs to maintain a certain distance from the bottom of the tank during operation, which makes it impossible to completely get close to the bottom, thus causing sludge residue in the bottom area. Attached Figure Description

[0020] Figure 1 A first-view structural schematic diagram of the dredging device provided according to the present invention is shown; Figure 2 A second-view structural schematic diagram of the dredging device provided according to the present invention is shown; Figure 3 A first-view structural schematic diagram of the dredging vehicle body of the dredging device according to the present invention is shown; Figure 4 A second-view structural schematic diagram of the dredging vehicle body of the dredging device according to the present invention is shown; Figure 5This is a third-view structural schematic diagram of the dredging vehicle body of the dredging device provided by the present invention; Figure 6 This is a fourth-view structural schematic diagram of the dredging vehicle body of the dredging device provided by the present invention; Figure 7 It shows Figure 2 A magnified view of a portion of point C.

[0021] The above figures include the following reference numerals: 1. Drive component; 11. First walking assembly; 12. Second walking assembly; 13. Third walking assembly; 14. Stepping drive cylinder; 2. Dredging vehicle body; 21. Frame; 22. Sludge pump; 23. Spiral sludge collection assembly; 231. First spiral blade; 232. Second spiral blade; 24. Buffer roller; 25. Placement frame; 26. Filter plate; 261. Filter grid; 27. Drive component; 28. Transmission component; 29. ​​Walking wheel; 291. Swing component; 292. Baffle plate; 3. Winch; 4. Flexible connector; 5. First contact component; 6. First detection component; 7. Moving rod; 8. Second contact component; 9. Second detection component; 10. Guide component; 15. Stop component; 16. Elastic component; 17. Storage box; 18. Swing arm; 100. Track. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0023] Please see Figures 1 to 7 According to an embodiment of the present invention, a dredging device is provided, comprising: a driving component 1 and a dredging vehicle body 2. The driving component 1 is disposed on a track 100 and is movably disposed relative to the track 100 along a preset track path. The dredging vehicle body 2 is movably disposed on the driving component 1 and is located at the bottom of the driving component 1. The dredging vehicle body 2 is used to clean sludge in a water tank. The dredging vehicle body 2 has a sludge collecting part and a buffer part, both of which are movably disposed. The sludge collecting part is used to collect sludge, and the buffer part is disposed at intervals from the sludge collecting part, with at least a portion of the buffer part located below the sludge collecting part. When the dredging vehicle body 2 approaches the bottom surface of the water tank, the buffer part first contacts the bottom surface of the water tank, and the buffer part moves upon contact, causing a portion of the sludge collecting part to adhere to the bottom surface of the water tank.

[0024] As can be seen, the dredging device provided by this utility model includes: a drive component 1 and a dredging vehicle body 2. The drive component 1 is suspended on a track 100 and moves relative to the track along a preset track path. The dredging vehicle body 2, used to clean the silt in the water tank, is movably mounted on the drive component 1, and the dredging vehicle body 2 is located at the bottom of the drive component 1. Thus, the drive component 1 drives the dredging vehicle body 2 to move along the preset track path, thereby realizing continuous operation of the dredging area of ​​the water tank. At the same time, the dredging vehicle body 2 is movably mounted on the drive component 1, which allows the dredging vehicle body 2 to move away from or closer to the bottom surface of the water tank. The dredging vehicle body 2 has a mud collection section and a buffer section, both of which are movably arranged. The mud collection section faces the target dredging area and is used to collect sludge. The buffer section is spaced apart from the mud collection section, and at least part of the buffer section is located below the mud collection section. When the dredging vehicle body 2 approaches the bottom surface of the water tank, the buffer section first contacts the bottom surface of the water tank, and the buffer section moves upon contact, causing part of the mud collection section to adhere to the bottom surface of the water tank.

[0025] Therefore, by incorporating a buffer section, during the dredging vehicle body 2's descent, the buffer section acts as a pilot structure, contacting the bottom surface of the water tank first. Its movable design absorbs impact energy, thus providing cushioning and shock absorption. This mechanism effectively prevents the sludge collection section from wearing down, deforming, or even being damaged due to direct impact with the hard bottom surface, extending the service life of key components and reducing maintenance costs. Furthermore, the buffer section's pre-contact and motion response provide dynamic positioning feedback for the sludge collection section, enabling the entire dredging vehicle body 2 to achieve a smooth transition and flexible landing as it approaches the bottom surface, avoiding equipment vibration, deviation, or jamming caused by sudden obstruction. This "probe-then-attach" working mode enhances the stability of system operation, helps maintain a constant dredging depth and uniform sludge flow rate, and improves the controllability and consistency of the operation process. Simultaneously, the buffer section's motion response after contacting the bottom surface causes the sludge collection section to adjust its posture, allowing some areas to automatically conform to the contour of the water tank bottom surface. Furthermore, due to the movable nature of the buffer section, it can adjust its position in real time according to changes in the bottom surface, thereby causing the sludge collection section to form a partially flush state. Even when the bottom surface is uneven or obstructed, it can still ensure that some sludge collection areas remain close to the ground for effective collection. This allows the sludge collection section to thoroughly remove the sludge layer close to the bottom of the pool, avoiding problems such as hardening, corrosion, or microbial growth caused by long-term accumulation of residues. This helps extend the service life of the water tank and reduce the frequency of subsequent maintenance. More thorough sludge removal also means better results per operation, extending the sludge removal cycle and reducing operating costs. In addition, the drive component 1 is movably installed along the track 100, and in conjunction with the automatic lifting and buffering functions of the sludge removal vehicle 2, the entire device can achieve fully automatic cruise sludge removal through remote control or preset programs. No manual well-diving or diving operations are required, greatly improving operational safety, making it particularly suitable for long-term operation and maintenance needs in enclosed spaces, deep water areas, or toxic and hazardous environments. This dredging device effectively solves the technical problem in the existing technology that, in order to prevent the dredging vehicle body from colliding with the bottom of the water tank, the bottom of the dredging device needs to maintain a certain distance from the bottom of the tank during operation, which makes it impossible to completely get close to the bottom, thus causing sludge residue in the bottom area.

[0026] The “preset track path” mentioned above refers to the track extension route that is planned and fixed in advance within the water tank according to the needs of dredging the water tank.

[0027] Specifically, such as Figures 1 to 6As shown, the dredging vehicle body 2 includes: a frame 21, a sludge pump 22, a spiral sludge collection assembly 23, and a buffer roller 24. The sludge pump 22 is mounted on the frame 21 and is used to extract sludge. The spiral sludge collection assembly 23 is rotatably mounted on the frame 21 and is located on the side of the frame 21 facing the target dredging area. It collects sludge by rotating and pushes the collected sludge to the feed inlet of the sludge pump 22. The buffer roller 24 extends along the width direction of the frame 21 and is located at the bottom of the frame 21. The buffer roller 24 is tiltable relative to the frame 21. The buffer roller 24 and the spiral sludge collection assembly 23 are spaced apart along the length direction of the frame 21. The buffer roller 24 is located on the side of the frame 21 away from the target dredging area, and at least a portion of the buffer roller 24 is located below the spiral sludge collection assembly 23. The spiral mud collecting assembly 23 forms the mud collecting part of the dredging vehicle body 2, and the buffer roller 24 forms the buffer part of the dredging vehicle body 2.

[0028] By employing the aforementioned structural design, a swaying buffer roller 24 is installed at the bottom of the frame 21. During the dredging vehicle's descent, this roller contacts the bottom of the water tank before the spiral sludge collection assembly 23. The swaying motion of the buffer roller 24 enables adaptive response to changes in the bottom height. This action causes the frame 21 to adjust its overall or partial posture, allowing the spiral sludge collection assembly 23 at the front to partially conform to the contour of the water tank bottom. This effectively eliminates the problem of bottom sludge residue caused by maintaining a safe distance in traditional equipment, significantly improving dredging coverage and cleaning quality. Furthermore, the buffer roller 24, as a pilot contact unit, absorbs impact energy through its swaying structure upon contact with the bottom surface, providing cushioning and shock absorption, preventing hard impacts on critical components such as the spiral sludge collection assembly 23 when the entire dredging vehicle 2 falls. This design significantly reduces the risk of equipment wear, deformation, or jamming caused by uneven tank bottoms, protruding foreign objects, or operational errors, extending equipment lifespan and improving operational reliability. Meanwhile, the buffer roller 24 extends along the width of the frame 21 and is arranged on the side of the frame 21 away from the target dredging area (i.e., the rear end), spaced apart from the spiral sludge collection assembly 23 located at the front end in the length direction, forming a spatial layout of "front collection and rear support, staggered vertical alignment". This design not only ensures that the buffer roller 24 can independently respond to changes in the bottom surface without interfering with the sludge collection operation, but also achieves weight balance and uniform force distribution, preventing the dredging vehicle from tilting forward or being unbalanced during operation, thus improving the overall stability of operation. In addition, the spiral sludge collection assembly 23 is rotatably set on the side of the frame 21 facing the dredging area, and can actively agitate and collect sludge during travel, achieving a highly efficient "collect first, then transport" operation mode. It pushes the collected sludge axially to the feed inlet of the sludge pump 22, forming a stable feed flow, avoiding uneven feeding, blockage, or idling caused by direct suction, and significantly improving the continuity of sludge transport and pumping efficiency.

[0029] The “target dredging area” mentioned above refers to the area in the water tank that needs to be cleaned of silt.

[0030] Among them, such as Figure 3 In the diagram, arrow B indicates the width direction of frame 21. For example... Figure 4 As shown, arrow A points in the direction of the length of frame 21.

[0031] Furthermore, when the dredging vehicle 2 descends to the bottom of the water tank, the buffer roller 24 makes initial contact with the bottom surface. As the dredging vehicle 2 continues to descend, the buffer roller 24 is squeezed upwards by the bottom surface of the water tank. During the swinging process of the buffer roller 24, the posture of the dredging vehicle 2 is adjusted, causing part of the spiral sludge collection assembly 23 at the front to gradually approach and eventually contact the bottom surface of the water tank, achieving effective contact cleaning of the bottom surface. When the dredging vehicle 2 begins to rise and move away from the bottom surface of the water tank, the buffer roller 24 gradually returns to its initial posture under the action of the elastic reset mechanism, facing the bottom surface of the water tank again, ready for the next operation cycle.

[0032] Furthermore, such as Figure 3 As shown, the spiral sludge collection assembly 23 includes a first spiral blade 231 and a second spiral blade 232. Both the first spiral blade 231 and the second spiral blade 232 extend along the width direction of the frame 21. The first spiral blade 231 and the second spiral blade 232 rotate in opposite directions. One end of the first spiral blade 231 is rotatably connected to the frame 21, and the other end of the first spiral blade 231 is connected to one end of the second spiral blade 232. The other end of the second spiral blade 232 is rotatably connected to the side of the frame 21 away from the first spiral blade 231. During the dredging operation, the first spiral blade 231 and the second spiral blade 232 rotate synchronously. Utilizing the bidirectional collecting effect generated by their opposite rotation directions, the sludge distributed on both sides of the frame 21 is gathered towards the center and continuously pushed axially to the inlet of the sludge pump 22, thereby achieving efficient and uniform sludge collection and conveying.

[0033] Furthermore, such as Figure 3 As shown, the dredging vehicle body 2 also includes a drive component 27 and a transmission component 28. The drive component 27 is mounted on the top of the frame 21, and the transmission component 28 is connected to the drive end of the drive component 27 and the first spiral blade 231 or the second spiral blade 232, respectively. Thus, the drive component 27 drives the first spiral blade 231 and the second spiral blade 232 to rotate through the transmission component 28.

[0034] Optionally, the transmission component 28 is a chain, which is sleeved on the driving end of the driving component 27 and on the first helical blade 231 or the second helical blade 232. When the driving end of the driving component 27 rotates, the chain drives the first helical blade 231 and the second helical blade 232 to rotate.

[0035] Specifically, such as Figures 3 to 6 As shown, the dredging vehicle body 2 also includes: a placement frame 25, which is mounted on the frame 21 and located on the side of the frame 21 away from the target dredging area, and is positioned above the buffer roller 24; the placement frame 25 has a placement cavity, and the sludge pump 22 is mounted inside the placement cavity, with the inlet of the sludge pump 22 facing the bottom of the placement cavity; wherein, the side of the frame 21 near the placement frame 25 has a sludge inlet communicating with the placement cavity, and the spiral sludge collection assembly 23 pushes the collected sludge toward the sludge inlet.

[0036] By adopting the above-described structural configuration, a placement frame 25 is provided on one side of the frame 21, and at least a portion of the sludge pump 22 is housed within its internal placement cavity, forming a structurally integrated and physically protected system for the sludge pump 22. This design avoids the problems of traditional external mounting, such as susceptibility to collisions, and significantly improves the operational safety and service life of key power components, making it particularly suitable for long-term operations in complex underwater environments. Furthermore, the placement frame 25 is located on the side of the frame 21 furthest from the target dredging area (i.e., the rear end) and above the buffer roller 24. This arrangement allows the relatively heavy component, the sludge pump 22, to be rationally positioned at a high rear of the dredging vehicle body 2, which helps to balance the forward tilting torque brought by the front spiral sludge collection assembly 23 and improves the overall stress distribution. At the same time, the high rear-positioned arrangement also helps to reduce the interference of bottom sludge accumulation on the pump body, preventing the equipment from being overloaded or overturned during travel and improving operational stability. Furthermore, the placement chamber of the placement frame 25 is connected to the sludge inlet on the frame 21, and the feed inlet of the sludge pump 22 is positioned facing the bottom of the placement chamber, forming a complete, low-resistance conveying path from the spiral sludge collection assembly → sludge inlet → placement chamber → feed inlet. After the spiral sludge collection assembly 23 pushes the sludge to the sludge inlet, the sludge naturally falls to the bottom of the placement chamber under gravity and directly enters the suction port of the sludge pump 22, avoiding leakage, accumulation, or air blockage during the conveying process and ensuring maximum suction efficiency.

[0037] Specifically, such as Figure 3 As shown, the sludge removal vehicle body 2 also includes a filter plate 26, which is installed at the sludge inlet and is used to filter the sludge entering the placement chamber. This structural arrangement, by installing the filter plate 26 at the sludge inlet, allows for preliminary screening of the sludge before it enters the placement chamber, intercepting large impurities such as stones, plastics, rags, and branches, preventing them from directly entering the inlet of the sludge pump 22. This design significantly reduces the risk of pump blockage, impeller damage, or motor overload caused by foreign objects, ensuring the continuous and stable operation of the pumping system.

[0038] Furthermore, the filter plate 26 is provided with a filter grid 261, which forms a uniformly distributed sieve structure to intercept solid debris with larger particle size (such as stones, plastics, aquatic plants, etc.) and only allow sludge slurry that meets the particle size requirements to pass through, thereby improving the efficiency of subsequent treatment and protecting the safe operation of the equipment.

[0039] Furthermore, such as Figure 4 and Figure 5 As shown, the dredging vehicle body 2 also includes two swinging members 291, which are spaced apart along the width direction of the frame 21. The two swinging members 291 are located on both sides of the frame 21, symmetrically arranged, and both are located at the bottom of the frame 21. The two ends of the buffer roller 24 are fixedly connected to one end of each swinging member 291, and the other end of each swinging member 291 is rotatably connected to the frame 21. When the buffer roller 24 contacts the bottom surface of the water tank and is subjected to upward pressure from the bottom surface of the water tank, at least one of the two swinging members 291 swings upward around its rotatable connection point with the frame 21, thereby causing the buffer roller 24 to tilt or partially lift, achieving an adaptive response to changes in the height of the bottom surface.

[0040] Optionally, when there are undulations or local protrusions on the bottom surface of the water tank, one end of the buffer roller 24 will contact the bottom surface before the other end. The end will transmit the reaction force through the swing member connected to it, so that the swing member 291 on that side will swing upward around the rotation connection point between it and the frame 21, thereby realizing the local lifting and attitude adjustment of the buffer roller 24, ensuring that the dredging vehicle body 2 smoothly transitions to the bottom-hugging operation state.

[0041] Furthermore, such as Figure 4 and Figure 5 As shown, the dredging vehicle body 2 also includes two traveling wheels 29, each corresponding to one of two swinging members 291. Each traveling wheel 29 is rotatably mounted on its corresponding swinging member 291. Thus, as the dredging vehicle body 2 moves, the traveling wheels 29 can swing up and down through the linkage of the swinging members 291, adapting to the unevenness of the water tank bottom. Furthermore, during dredging operations, when the drive unit 1 moves the dredging vehicle body 2, the two traveling wheels 29 roll forward on the water tank bottom, bearing part of the weight of the dredging vehicle body 2 and reducing movement resistance.

[0042] Furthermore, the dredging vehicle body 2 also includes a baffle 292, which extends along the width of the frame 21 and is located at the bottom of the frame 21, between the spiral sludge collection assembly 23 and the buffer roller 24. When the dredging vehicle body 2 contacts the bottom surface of the water tank, the baffle 292 separates the area to be cleaned from the completed area, thereby preventing the deposited or being cleaned sludge from spreading, flowing back, or being re-deposited into the completed area, and avoiding re-contamination of the cleaned area. This design helps maintain the orderly progress of the dredging operation, ensures that the dredging process has clear operational boundaries, and improves the coverage and quality of the dredging operation. At the same time, the baffle 292 can prevent residual sludge in front from flowing back to the clean area behind under the disturbance of water flow, significantly reducing repeated cleaning and improving the overall dredging efficiency.

[0043] Optionally, the baffle 292 has a certain degree of elasticity.

[0044] Specifically, such as Figure 1 and Figure 2 As shown, the dredging device also includes: a winch 3 and a flexible connector 4. The winch 3 is mounted on the drive component 1 and is located at the bottom of the drive component 1. Part of the flexible connector 4 is wound around the winch 3. The free end of the flexible connector 4 is connected to the dredging vehicle body 2 so that the flexible connector 4 can be wound and unwound by the winch 3 to lower the dredging vehicle body 2 to the target operation position or raise it to a preset parking position above the water surface.

[0045] With the above-described structure, the winch 3 and flexible connector 4 allow for controlled lowering and raising of the dredging vehicle 2. The winch 3 moves the dredging vehicle 2 by extending and retracting the flexible connector 4, enabling it to accurately reach the target working depth within the water tank or be raised above the water surface after completing its work. This design achieves dynamic adjustment of the dredging vehicle 2, allowing it to meet the operational needs of different water depths and dredging stages. Furthermore, by connecting the flexible connector 4 to the dredging vehicle 2, when the dredging vehicle 2 comes into contact with or collides with obstacles during its movement within the water tank, the flexible connector 4's flexibility and allowance for movement allow the dredging vehicle 2 to swing or displace at the connection point, absorbing impact energy and mitigating instantaneous stress concentration. This mobility effectively avoids rigid impacts, significantly reducing the risk of structural damage to equipment due to collisions and improving the stability and safety of the system operation.

[0046] Optionally, the flexible connector 4 is a circular link chain.

[0047] Specifically, such as Figure 2As shown, the dredging device further includes: a first contact element 5 and a first detection element 6. The first contact element 5 is mounted on the flexible connector 4 and is located at one end of the flexible connector 4 near the dredging vehicle body 2. The first detection element 6 is mounted on the drive component 1 and is located at the bottom of the drive component 1. The first detection element 6 is communicatively connected to the winch 3. The first detection element 6 is used to detect whether the dredging vehicle body 2 has been raised to a preset parking position, and controls the winch 3 to stop its winding action based on the detection result. When the first contact element 5 contacts the detection end of the first detection element 6, the first detection element 6 is triggered to output a stop signal to control the winch 3 to stop its winding action. The first detection element 6 and the winch 3 are spaced apart.

[0048] By adopting the above-described structure, and by setting up the first contact element 5 and the first detection element 6, and forming a communication control loop with the winch 3, automatic identification and precise stopping of the dredging vehicle body 2 when it is lifted to the preset parking position are achieved. This design not only effectively prevents safety accidents such as over-winding and impact, but also improves the automation level and operational reliability of the equipment. It has a simple structure and reliable response, and is particularly suitable for dredging scenarios that require long-term unattended operation or remote control.

[0049] Optionally, the first contact 5 is a first contact plate, and the first detection element 6 is a first limit switch or a first proximity switch.

[0050] The first embodiment of the driving component 1 provided by this utility model is as follows: Figure 1 and Figure 2 As shown, the drive component 1 includes: a first traveling assembly 11 and a second traveling assembly 12. The first traveling assembly 11 is movably mounted on the track 100 along a preset track path; the second traveling assembly 12 is movably mounted on the track 100 along the preset track path, and the second traveling assembly 12 is located at the rear end of the first traveling assembly 11; the second traveling assembly 12 and the first traveling assembly 11 are connected by a connecting rod; the dredging vehicle body 2 is swayably mounted on the first traveling assembly 11; the winch 3 and the first detection element 6 are spaced apart on the second traveling assembly 12, and both the winch 3 and the first detection element 6 are located at... The bottom of the second walking assembly 12; the third walking assembly 13 and the stepping drive cylinder 14, the third walking assembly 13 is movably mounted on the track 100 along a preset track path, and the third walking assembly 13 is located at the rear end of the second walking assembly 12. The third walking assembly 13 is connected to the second walking assembly 12 through the stepping drive cylinder 14; the first walking assembly 11, the second walking assembly 12 and the third walking assembly 13 are driven to move in a coordinated manner by the alternating braking of the first braking part of the first walking assembly 11 and the third braking part of the third walking assembly 13, and by the extension and retraction drive of the stepping drive cylinder 14.

[0051] By adopting the above structural configuration, and by setting up a three-section walking component in conjunction with a stepping drive cylinder 14 and an alternating braking mechanism, an adaptive, stepping, and cyclically movable drive system is constructed. This design not only enables the dredging device to move autonomously and accurately on the track, but also improves the stability, safety, and environmental adaptability of the equipment through a reasonable structural layout and center of gravity distribution. Combined with the swing suspension and winch lifting function of the dredging vehicle body, the overall system has highly integrated, intelligent, and practical features, and is particularly suitable for long-distance, unattended underwater dredging operations.

[0052] Furthermore, such as Figure 1 and Figure 2 As shown, the dredging device also includes a storage box 17, which is mounted on the second traveling assembly 12 and located at the bottom of the winch 3. The storage box 17 has an opening and a storage cavity communicating with the opening. The opening is located at the top of the storage box 17. The end of the flexible connector 4 away from the dredging vehicle body 2 is connected to the storage box 17. The storage box 17 is used to orderly store the winding section of the flexible connector 4.

[0053] Optionally, due to the limited winding capacity of the winch 3, the portion of the flexible connector 4 exceeding the winch 3's winding capacity can be accommodated in the storage cavity of the storage box 17. When the dredging vehicle 2 needs to be lowered, as the winch 3 rotates, a portion of the flexible connector 4 in the storage cavity is gradually released and guided to the winch 3 for unwinding; when the dredging vehicle 2 is raised to the preset parking position, the flexible connector 4 is retrieved by the winch 3, and the excess portion that cannot be wound onto the winch 3 automatically falls into or is stored in the storage cavity. This design, through the coordinated operation of the storage box 17 and the winch 3, achieves effective management and orderly storage of the flexible connector 4, avoiding the risks of loosening, knotting, or scraping against the track and other components, thus improving the safety and overall aesthetics of the equipment operation.

[0054] Furthermore, such as Figure 1 and Figure 2 As shown, the dredging device also includes a swing arm 18, one end of which is rotatably mounted at the bottom of the first traveling assembly 11, and the other end of which is connected to the dredging vehicle body 2, so that the dredging vehicle body 2 can be swung by the swing arm 18. The end of the flexible connector 4 away from the winch 3 (i.e., the free end of the flexible connector 4) is connected to the swing arm 18, and the end of the flexible connector 4 away from the winch 3 (i.e., the free end of the flexible connector 4) is located at the end of the swing arm 18 close to the dredging vehicle body 2.

[0055] With the above-described structure, the dredging vehicle 2 can achieve lifting and lowering motion by swinging the swing arm 18. Because the swing arm 18 has sufficient length, when facing water tanks of different heights, the swing angle of the swing arm 18 can be adjusted to ensure that the dredging vehicle 2 can descend smoothly and make close contact with the bottom of the tank. This design enables the dredging device to adapt to water tanks of different heights, improving the flexibility and versatility of the equipment. Regardless of the change in the height of the water tank, the dredging device can operate effectively, ensuring the smooth progress of the cleaning work.

[0056] Optionally, the swing arm 18 adopts a parallel four-bar structure, so that it remains perpendicular to the bottom of the water tank during the lifting and lowering of the dredging vehicle body 2, ensuring that the dredging device is stably attached to the bottom and improving the reliability and effectiveness of the dredging operation.

[0057] The second embodiment of the driving component 1 provided by this utility model is as follows: The driving component 1 includes a third traveling component and a fourth traveling component. The third traveling component is movably mounted on the track 100 along a preset track path; the fourth traveling component is movably mounted on the track 100 along the preset track path, and the fourth traveling component is located at the rear end of the third traveling component; the fourth traveling component and the third traveling component are connected by a connecting rod; the dredging vehicle body 2 is swayably mounted on the third traveling component; the winch 3 and the first detection element 6 are spaced apart on the fourth traveling component, and both the winch 3 and the first detection element 6 are located at the bottom of the fourth traveling component. Both the third and fourth traveling components are driven by hydraulic oil, and the third traveling component has a third braking part, and the fourth traveling component has a fourth braking part. Both the third and fourth braking parts are also controlled by hydraulic oil. When braking is required, the third and fourth braking parts operate synchronously, or one of the third and fourth braking parts brakes, thereby stopping the movement of the third and fourth traveling components.

[0058] Specifically, such as Figure 4 , Figure 5 and Figure 7As shown, the dredging device also includes: a movable rod 7, a second contact element 8, and a second detection element 9. The movable rod 7 is mounted on the frame 21 and located on the side of the frame 21 away from the target dredging area. The movable rod 7 extends along the height direction of the frame 21. One end of the movable rod 7 is rotatably connected to a buffer roller 24 so that the movable rod 7 can be moved along the height direction of the frame 21 by the swing of the buffer roller 24. The second contact element 8 is mounted on the end of the movable rod 7 away from the buffer roller 24. The second detection element 9 is mounted on the frame 21 and is located above the second contact element 8. The detection end of the second detection element 9 is positioned facing the second contact element 8. The second detection element 9 is communicatively connected to the winch 3. The second detection element 9 is used to detect whether the dredging vehicle body 2 has descended to the bottom of the water tank, and to control whether the winch 3 stops releasing based on the detection result. When the buffer roller 24 contacts the bottom of the water tank, the buffer roller 24 drives the moving rod 7 and the second contact element 8 to move toward the detection end of the second detection element 9, so that the second contact element 8 contacts the detection end of the second detection element 9, thereby triggering the second detection element 9 to output a stop signal and control the winch 3 to stop releasing.

[0059] By employing the aforementioned structural design, and through the inclusion of a moving rod 7, a second contact element 8, and a second detection element 9, all mechanically linked with the buffer roller 24, automatic identification and precise stopping control are achieved when the dredging vehicle body 2 descends to the bottom of the water tank. This design not only ensures that the dredging vehicle body 2 reliably adheres to the bottom, improving the thoroughness of dredging, but also effectively prevents excessive release of the flexible connector 4. By combining the first contact element 5 and the first detection element 6, the entire system forms a complete lifting protection closed loop, significantly enhancing the intelligence, automation, and engineering practicality of the dredging device.

[0060] Furthermore, the end of the moving rod 7 away from the second detection element 9 is hinged to the swing element 291.

[0061] Furthermore, there are two of each of the moving rod 7, the second contact member 8, and the second detection member 9, and each moving rod 7, each second contact member 8, and each second detection member 9 are set in a one-to-one correspondence with each swing member 291.

[0062] Optionally, the second detection element 9 is a second limit switch or a second proximity switch.

[0063] Specifically, such as Figure 4 , Figure 5 and Figure 7As shown, the dredging device also includes: a guide member 10, a stop member 15, and an elastic member 16. The guide member 10 is mounted on the frame 21, and the guide member 10 is located on the side of the frame 21 away from the target dredging area. The guide member 10 is provided with a guide hole extending along the height direction of the frame 21, and the moving rod 7 passes through the guide hole. The stop member 15 is movably mounted on the moving rod 7 along the extension direction of the moving rod 7, and the stop member 15 is located below the guide member 10. The elastic member 16 is sleeved on the moving rod 7, and the two ends of the elastic member 16 abut against the stop member 15 and the guide member 10, respectively. The elastic member 16 has a compressed state and an initial state. When the buffer roller 24 drives the moving rod 7 and the second contact member 8 to move toward the detection end of the second detection member 9, the elastic member 16 is in a compressed state. When the buffer roller 24 moves away from the bottom surface of the water tank, the self-restoring force of the elastic member 16 drives the moving rod 7 and the second contact member 8 to move away from the second detection member 9, so that the elastic member 16 returns to the initial state.

[0064] With the above-described structure, a guide member 10 with a vertical guide hole is provided on the frame 21, through which the moving rod 7 passes, forming a linear guiding constraint on the movement of the moving rod 7 along the height direction. This structure effectively prevents the moving rod 7 from lateral deviation, swaying, or jamming during the swinging of the buffer roller 24, ensuring that its movement trajectory is vertical, stable, and predictable. This improves the accuracy and repeatability of the contact action between the second contact member 8 and the second detection member 9, ensuring stable output of the control signal. At the same time, the elastic member 16 is sleeved on the moving rod 7, with its two ends abutting against the stop member 15 and the guide member 10, respectively, forming an elastic reset mechanism. When the dredging vehicle body 2 is lifted and the buffer roller 24 is removed from the bottom of the water tank, the elastic member 16 releases its stored energy, causing the moving rod 7 and the second contact member 8 to automatically reset downwards, away from the detection end of the second detection member 9, thus releasing the trigger state. This design realizes the "trigger stroke - automatic zeroing" of the detection mechanism, preparing for the next descent operation and avoiding false signals or control failures due to component retention.

[0065] Furthermore, when the dredging vehicle body 2 is raised and the buffer roller 24 is away from the bottom of the water tank, the self-restoring force of the elastic element 16 drives the moving rod 7 and the second contact element 8 to move away from the second detection element 9, while driving the buffer roller 24 to swing downward, so that the buffer roller 24 returns to its initial state.

[0066] Furthermore, there are two guide members 10, two stop members 15, and two elastic members 16, and each guide member 10, each stop member 15, and each elastic member 16 is set in a one-to-one correspondence with each swing member 291.

[0067] Optionally, the elastic element 16 is a spring.

[0068] Optionally, the working process of the dredging device is as follows: S1: Move to the start position of the operation. The drive unit 1 moves the dredging vehicle 2 along the track 100 towards the target dredging area. At this time, the dredging vehicle 2 is positioned at a preset parking position above the water surface, ensuring that the dredging vehicle 2 does not come into contact with the water. When the dredging vehicle 2 reaches the starting position of the target dredging area, it stops moving.

[0069] S2: Initiate the decentralization process The winch 3 starts and begins to release the flexible connector 4. As the flexible connector 4 is gradually released, the swing arm 18 swings downward under the action of gravity and the connection relationship, thereby driving the dredging vehicle body 2 toward the bottom of the water tank.

[0070] S3: Buffer roller 24 contacts the bottom surface and adjusts adaptively. When the dredging vehicle body 2 approaches the bottom of the water tank, the buffer roller 24 makes contact with the bottom surface first. As the dredging vehicle body 2 continues to descend, the buffer roller 24 is subjected to upward pressure from the bottom surface of the water tank, causing at least one of the two swinging parts 291 connected to it to swing upward around its rotational connection point with the frame 21, causing the buffer roller 24 to tilt or partially lift, thereby achieving adaptive fitting to the undulations of the bottom surface.

[0071] S4: Trigger the lower limit stop and stop the descent. During the upward swing of at least one swinging member 291, the movable rod 7 hinged to it moves upward synchronously, thereby pushing the second contact member 8 located at its top end toward the detection end of the second detection member 9. When the second contact member 8 contacts the detection end of the second detection member 9, it triggers the second detection member 9 to output a stop signal, controlling the winch 3 to stop releasing the flexible connecting member 4.

[0072] S5: Start dredging operations After the dredging vehicle body 2 is stably attached to the bottom surface, the drive unit 27 and the sludge pump 22 are started, driving the first spiral blade 231 and the second spiral blade 232 to rotate synchronously. At the same time, the drive unit 1 drives the dredging vehicle body 2 to move slowly forward along the track 100.

[0073] The first helical blade 231 and the second helical blade 232 rotate in opposite directions. During rotation, they draw the sludge distributed on both sides of the frame 21 toward the center and continuously push it axially to the sludge inlet connected to the placement chamber. After entering the placement chamber through the sludge inlet, the sludge is sucked in through the feed port of the sludge pump 22. After being pressurized by the sludge pump 22, it is transported to an external sludge collection system or discharge point through the sludge discharge pipe connected to it.

[0074] S6: Lift the dredging vehicle body 2 and reset it. When it is necessary to lift the dredging vehicle body 2, the control stops the drive component 27 and the sludge pump 22, and the winch 3 is started to retract. As the flexible connector 4 is gradually retracted, the swing arm 18 drives the dredging vehicle body 2 to move upward and detach from the bottom of the water tank.

[0075] S7: Trigger the upper limit switch and complete the reset. When the dredging vehicle body 2 rises to the preset parking position, the first contact member 5 set on the flexible connector 4 contacts the detection end of the first detection member 6 set at the bottom of the drive component 1, triggering the first detection member 6 to output a stop signal, controlling the winch 3 to stop winding, and realizing the precise positioning and parking of the dredging vehicle body 2.

[0076] During the lifting process, after the buffer roller 24 is removed from the bottom of the water tank, the elastic element 16 gradually returns to its initial state under the action of its self-restoring force, thereby driving the moving rod 7 and the second contact element 8 to reset downwards, and at the same time restoring the buffer roller 24 to its initial posture, preparing it for the next operation.

[0077] This utility model also provides a coal mine underground water tank dredging system, including: a dredging device, which is the dredging device described in the above embodiment.

[0078] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0079] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0080] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0081] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0082] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A dredging device, characterized in that, include: A drive component (1) is disposed on a track (100), and the drive component (1) is movably disposed relative to the track (100) along a preset track path; The dredging vehicle body (2) is movably mounted on the drive component (1) and is located at the bottom of the drive component (1). The dredging vehicle body (2) is used to clean the sludge in the water tank. The dredging vehicle body (2) has a sludge collection part and a buffer part, both of which are movably mounted. The sludge collection part is used to collect sludge, and the buffer part is spaced apart from the sludge collection part. At least a portion of the buffer part is located below the sludge collection part. When the dredging vehicle body (2) approaches the bottom surface of the water tank, the buffer part first contacts the bottom surface of the water tank, and the buffer part moves when in contact, so that part of the mud collection part fits against the bottom surface of the water tank.

2. The dredging device according to claim 1, characterized in that, The dredging vehicle body (2) includes: Rack (21); A sludge pump (22) is mounted on the frame (21) for pumping sludge; Spiral sludge collection assembly (23) is rotatably mounted on the frame (21) and the spiral sludge collection assembly (23) is located on the side of the frame (21) facing the target sludge dredging area, so as to collect the sludge by rotating the spiral sludge collection assembly (23) and push the collected sludge to the feed port of the sludge pump (22); A buffer roller (24) extends along the width direction of the frame (21), the buffer roller (24) is disposed at the bottom of the frame (21), and the buffer roller (24) is swayable relative to the frame (21); the buffer roller (24) and the spiral sludge collection assembly (23) are spaced apart along the length direction of the frame (21), the buffer roller (24) is located on the side of the frame (21) away from the target dredging area, and at least a portion of the buffer roller (24) is located below the spiral sludge collection assembly (23).

3. The dredging device according to claim 2, characterized in that, The dredging vehicle body (2) further includes: a placement frame (25), which is mounted on the frame (21). The placement frame (25) is located on the side of the frame (21) away from the target dredging area, and the placement frame (25) is located above the buffer roller (24). The placement frame (25) has a placement cavity, and the sludge pump (22) is mounted in the placement cavity, with the inlet of the sludge pump (22) facing the bottom of the placement cavity. The frame (21) has a mud inlet on the side near the placement frame (25) that communicates with the placement cavity, and the spiral mud collection assembly (23) pushes the collected sludge toward the mud inlet.

4. The dredging device according to claim 3, characterized in that, The dredging vehicle body (2) also includes a filter plate (26), which is disposed on the mud inlet and is used to filter the sludge entering the placement cavity.

5. The dredging device according to claim 2, characterized in that, The dredging device further includes: a winch (3) and a flexible connector (4). The winch (3) is mounted on the drive component (1) and is located at the bottom of the drive component (1). Part of the flexible connector (4) is wound around the winch (3). The free end of the flexible connector (4) is connected to the dredging vehicle body (2) so that the flexible connector (4) can be wound up and down by the winch (3) to lower the dredging vehicle body (2) to the target operation position or raise it to a preset parking position above the water surface.

6. The dredging device according to claim 5, characterized in that, The dredging device also includes: The first contact (5) is mounted on the flexible connector (4) and is located at one end of the flexible connector (4) near the dredging vehicle body (2). The first detection element (6) is disposed on the drive component (1) and located at the bottom of the drive component (1). The first detection element (6) is communicatively connected to the winch (3). The first detection element (6) is used to detect whether the dredging vehicle body (2) is raised to the preset parking position, and to control whether the winch (3) stops winding according to the detection result. When the first contact member (5) comes into contact with the detection end of the first detection member (6), the first detection member (6) is triggered to output a stop signal to control the winch (3) to stop the winding action.

7. The dredging device according to claim 6, characterized in that, The driving component (1) includes: A first walking component (11) and a second walking component (12) are provided. The first walking component (11) is movably disposed on the track (100) along the preset track path. The second walking component (12) is movably disposed on the track (100) along the preset track path and is located at the rear end of the first walking component (11). The second walking component (12) is connected to the first walking component (11) by a connecting rod. The dredging vehicle body (2) is swayably disposed on the first walking component (11). The winch (3) and the first detection element (6) are spaced apart on the second walking component (12) and are both located at the bottom of the second walking component (12). The third walking component (13) and the stepping drive cylinder (14) are movably disposed on the track (100) along the preset track path and are located at the rear end of the second walking component (12). The third walking component (13) is connected to the second walking component (12) through the stepping drive cylinder (14). The first walking component (11), the second walking component (12) and the third walking component (13) are driven to move in coordination by the alternating braking of the first braking part of the first walking component (11) and the third braking part of the third walking component (13) and the extension and retraction drive of the stepping drive cylinder (14).

8. The dredging device according to claim 5, characterized in that, The dredging device also includes: A movable rod (7) is mounted on the frame (21) and located on the side of the frame (21) away from the target dredging area. The movable rod (7) extends along the height direction of the frame (21). One end of the movable rod (7) is rotatably connected to the buffer roller (24) so ​​that the movable rod (7) can be moved along the height direction of the frame (21) by the swing of the buffer roller (24). The second contact (8) is disposed on one end of the moving rod (7) away from the buffer roller (24); The second detection element (9) is disposed on the frame (21) and located above the second contact element (8). The detection end of the second detection element (9) faces the second contact element (8). The second detection element (9) is communicatively connected to the winch (3). The second detection element (9) is used to detect whether the dredging vehicle body (2) has descended to the bottom of the water tank, so as to control whether the winch (3) stops releasing based on the detection result. When the buffer roller (24) contacts the bottom surface of the water tank, the buffer roller (24) drives the moving rod (7) and the second contact member (8) to move toward the detection end of the second detection member (9), so that the second contact member (8) contacts the detection end of the second detection member (9), thereby triggering the second detection member (9) to output a stop signal and control the winch (3) to stop releasing.

9. The dredging device according to claim 8, characterized in that, The dredging device also includes: A guide member (10) is mounted on the frame (21) and the guide member (10) is located on the side of the frame (21) away from the target dredging area; the guide member (10) is provided with a guide hole extending along the height direction of the frame (21), and the moving rod (7) passes through the guide hole; Stop (15), the stop (15) is movably disposed on the moving rod (7) along the extension direction of the moving rod (7), and the stop (15) is located below the guide (10); An elastic element (16) is sleeved on the moving rod (7), and the two ends of the elastic element (16) abut against the stop (15) and the guide (10) respectively; the elastic element (16) has a compressed state and an initial state; When the buffer roller (24) drives the moving rod (7) and the second contact member (8) to move toward the detection end of the second detection member (9), the elastic member (16) is in the compressed state; when the buffer roller (24) moves away from the bottom surface of the water tank, the self-restoring force of the elastic member (16) drives the moving rod (7) and the second contact member (8) to move away from the second detection member (9), so that the elastic member (16) returns to the initial state.

10. A coal mine underground water tank dredging system, characterized in that, include: A dredging device, wherein the dredging device is the dredging device described in any one of claims 1 to 9.

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