A mine sump dredging device

Abstract

The application discloses a kind of mine sump dredging devices, including machine body, and machine body is provided with the suction shovel for sucking silt, and suction shovel includes the auger for sucking external silt and the auger for conveying silt, and auger is connected with conveying pipe, and conveying pipe is equipped with pulse air flow mechanism;The mud side of auger is equipped with the inclinedly arranged guide plate, and the push mechanism is equipped on guide plate, and push mechanism includes moving plate, and moving plate is connected with first power mechanism, and first power mechanism can drive moving plate to reciprocate along guide plate and approach or away from auger, and moving plate is hinged with the paddle;When first power mechanism drives moving plate to move towards the direction of approaching auger, paddle and moving plate are in open state;When first power mechanism drives moving plate to move towards the direction of away from auger, paddle and moving plate are in closed state.The application effectively avoids silt jam, stabilizes work load, improves dredging efficiency and equipment reliability, and prolongs service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dredging, in particular to a mine sump dredging device. BACKGROUND

[0002] With the increasing exploitation of mineral resources, the mining depth and range of coal mines and other mines are increasing. In the process of mining, water inrush in the mine is a common phenomenon, which needs to be discharged in time through the drainage system. The mine water usually carries solid particles such as coal dregs, rock debris and silt, which will deposit in the mine sump (water collecting pool) to form sludge, seriously affecting the effective volume of the sump and the normal operation of the drainage equipment. Long-term accumulation of sludge not only blocks the drainage pipeline and the water pump impeller, leading to a decrease in drainage capacity, but also may cause safety accidents. Therefore, it is crucial to regularly dredge the mine sump.

[0003] In order to remove the sludge in the sump, the existing technical solutions usually use a dredging device. One common method is to use a stirring mechanism to stir and dilute the sludge so that it can be discharged with the water pump. The traditional stirring mechanism often uses a guide plate to try to extrude or guide the sludge from a distance to the stirring area when processing the sludge.

[0004] However, this method of extruding and guiding the sludge by the guide plate has obvious technical defects. The guide plate can easily cause the sludge to be stuck, that is, the sludge is stagnant during the extrusion or guidance process and cannot flow smoothly to the stirring mechanism. This stagnation not only hinders the effective delivery of the sludge, but also causes the local compactness of the sludge near the stagnation area to increase suddenly.

[0005] Further, when the sludge is hindered and cannot flow into the stirring mechanism, the stirring mechanism will idle, and the power cannot be effectively utilized. When the sludge with sudden increase in local compactness suddenly breaks through the hindrance and flows into the stirring mechanism, the load (output) of the stirring mechanism will suddenly increase. This sudden change in load makes the output of the stirring mechanism extremely unstable. Long-term instability of the output will significantly increase the alternating stress of the key components such as the rotating shaft and the twisted leaves of the stirring mechanism, accelerating the fatigue damage of the components. Ultimately, this unstable working condition and increased alternating stress can easily cause the stirring mechanism to have mechanical loss, failure, and even shorten its service life, increasing the maintenance cost and downtime of the equipment. SUMMARY

[0006] The main purpose of the present application is to overcome the defects of the prior art mine sump dredging device, such as easy to be stuck in the sludge, causing the stirring load to fluctuate sharply, the parts to be easily damaged, and the service life to be short, and to provide a new type of mine sump dredging device, which can effectively crush and loosen the sludge at the entrance, prevent it from being stuck, and ensure that the sludge is smoothly and stably removed through pulse airflow auxiliary conveying, while ensuring the stable advancement of the equipment through constant force driving, and improving the dredging efficiency and equipment reliability.

[0007] The present application adopts the following technical solutions.

[0008] A mine sump dredging device, comprising a machine body, a suction shovel for sucking sludge is arranged on the machine body, the suction shovel comprises a reamer for sucking external sludge and an auger for conveying sludge, the auger is connected with a conveying pipe, and a pulse airflow mechanism is arranged on the conveying pipe.

[0009] The sludge-facing side of the reamer is provided with an inclined sludge guide plate, and a pushing mechanism is arranged on the sludge guide plate.

[0010] The pushing mechanism comprises a moving plate, the moving plate is connected with a first power mechanism, the first power mechanism can drive the moving plate to reciprocate along the sludge guide plate towards or away from the reamer, and a push piece is hinged to the moving plate.

[0011] When the first power mechanism drives the moving plate to move towards the reamer, the push piece and the moving plate are in an open state; when the first power mechanism drives the moving plate to move away from the reamer, the push piece and the moving plate are in a closed state.

[0012] Further, a second power mechanism is arranged, a constant force spring is connected between the second power mechanism and the machine body, and the second power mechanism can move intermittently.

[0013] Further, a plurality of moving plates are arranged, and the movement phases of adjacent moving plates are opposite.

[0014] The sludge guide plate is provided with a trigger block corresponding to the push piece, and the push piece is provided with an abutting shoulder matched with the trigger block.

[0015] When the abutting shoulder abuts against the trigger block, the push piece and the moving plate are in an open state.

[0016] Further, the first power mechanism comprises a rotatable crankshaft, a first power assembly is drivingly connected to the crankshaft, a plurality of rotatable connecting rods are arranged on the crankshaft, and one end of the connecting rod is hinged to the moving plate.

[0017] Further, the pulse air flow mechanism comprises a temporary storage tank arranged between the auger and the conveying pipe, and a plurality of air supply assemblies arranged at intervals on the conveying pipe, and the temporary storage tank and the air supply assemblies are connected with a pulse air pump through an air supply hose.

[0018] Further, a guide rail is arranged, and a plurality of load bearing seats are slidably connected to the guide rail, and the conveying pipe is hung on the load bearing seats.

[0019] Further, the conveying pipe comprises a plurality of alternately arranged hose sections and hard pipe sections, and the hard pipe sections are provided with air guide holes and pistons.

[0020] The air supply assembly comprises a cylinder body slidably sleeved outside the piston, the cylinder body is fixedly connected to the load bearing seat, and the piston and the cylinder body form an air charging cavity, the air charging cavity is connected with the pulse air pump, and the cylinder body is provided with a blocking wall capable of blocking the air guide hole.

[0021] The piston has a first position and a second position, when the piston is in the first position, the blocking wall blocks the air guide hole, and when the piston is in the second position, the air charging cavity is connected with the air guide hole.

[0022] A reset spring is arranged between the cylinder body and the piston, and the reset spring makes the piston have a tendency to remain in the first position.

[0023] The air pressure of the air charging cavity makes the piston have a tendency to move towards the second position.

[0024] The pulse air pump is also connected with the air charging cavity through the air supply hose.

[0025] Further, the guide rail is fixedly connected with a rack.

[0026] The second power mechanism comprises a traction frame slidably connected with the guide rail, the traction frame is provided with a traction wheel engaged with the rack, and the traction wheel is connected with a second power assembly.

[0027] The beneficial effects of the present application are as follows:

[0028] 1. Active pushing, avoiding jamming: through the setting of the pushing mechanism on the guide plate, especially the cooperative work of the moving plate and the push piece, when the moving plate is away from the auger, the folded push piece can actively "push" or "pull" the sludge to the auger area. This active pushing method replaces the passive extrusion of the traditional guide plate, effectively avoids the jamming of the sludge near the guide plate, and ensures the smooth flow of the sludge to the auger.

[0029] 2. Stable load, protect equipment: Because the sludge can be continuously and stably pushed to the reamer, the sudden influx or long time no material of the sludge is avoided, so that the load of the reamer and the auger is more stable, and the impact caused by the sudden increase and decrease of the load is avoided. This significantly reduces the alternating stress of the key components such as the rotating shaft and the blade of the stirring mechanism (the reamer and the auger), reduces the fatigue damage of the components, prolongs the service life of the equipment, and reduces the failure rate and maintenance cost.

[0030] 3. Auxiliary conveying, improve efficiency: The pulse airflow mechanism provided on the conveying pipe can reduce the flow resistance of the sludge in the pipe by injecting pulse airflow into the pipe, prevent the sludge from settling and clogging, especially when conveying over a long distance, the overall dredging and conveying efficiency is improved.

[0031] 4. Stable contact, high adaptability: Through the cooperation of the second power mechanism and the constant force spring, the whole dredging device can be stably moved, and the suction shovel can be continuously and stably pressed on the sludge layer, which can adapt to the uneven condition of the bottom of the water sump and ensure the dredging effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0033] Figure 1 It is a structural schematic diagram of an embodiment of the present application;

[0034] Figure 2 It is a three-dimensional structural schematic diagram of the pushing mechanism in an embodiment of the present application;

[0035] Figure 3 It is Figure 2 the enlarged view of A part;

[0036] Figure 4 It is a structural schematic diagram of the pulse airflow mechanism in an embodiment of the present application;

[0037] Figure 5 It is a structural schematic diagram of the piston of the pulse airflow mechanism in an embodiment of the present application in the second position;

[0038] Figure 6 It is a structural schematic diagram of the piston of the pulse airflow mechanism in an embodiment of the present application in the first position;

[0039] Figure 7 It is a sectional view of the suction shovel in an embodiment of the present application;

[0040] Figure 8Fig. 1 is a schematic view of a shearing device according to an embodiment of the present application.

[0041] Reference signs:

[0042] 1, suction shovel; 11, auger; 12, auger flight;

[0043] 2, mud guide plate; 21, trigger block;

[0044] 3, conveying pipe; 31, hose section; 32, hard pipe section;

[0045] 321, air guide hole; 322, piston;

[0046] 4, pulse air flow mechanism; 40, temporary storage tank; 41, air supply assembly;

[0047] 411, cylinder body; 412, air charging cavity; 413, blocking wall; 414, return spring;

[0048] 42, air supply hose;

[0049] 43, pulse air pump;

[0050] 5, pushing mechanism;

[0051] 51, moving plate; 52, push piece;

[0052] 521, abutting shoulder;

[0053] 53, mounting groove;

[0054] 6, first power mechanism;

[0055] 61, crankshaft; 62, first power assembly; 63, connecting rod;

[0056] 7, second power mechanism;

[0057] 70, rack; 71, traction frame; 72, traction wheel; 73, second power assembly; 74, constant force spring;

[0058] 8, guide rail; 81, load bearing seat;

[0059] 9, machine body. DETAILED DESCRIPTION

[0060] The drawings are only used for illustrative purposes and should not be understood as limiting the patent; in order to better illustrate the embodiment, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size.

[0061] It is understandable to some skilled persons in the art that some known structures and their descriptions in the drawings may be omitted. The technical solutions of the present application will be further described below in combination with the drawings and embodiments.

[0062] As attached Figures 1-8 The device shown is a mine water tank dredging device, which includes a body 9. The body 9 is equipped with a suction shovel 1 for sucking up sludge. The suction shovel 1 includes a cutter 11 for sucking up external sludge and an auger 12 for conveying sludge. The auger 12 is connected to a conveying pipe 3, and the conveying pipe 3 is equipped with a pulse airflow mechanism 4.

[0063] The suction shovel 1 is the core component for performing dredging operations. Its front end is equipped with a cutter head 11, which is used to break and agitate the silt at the bottom of the water tank. The cutter head 11 is connected to an auger 12, which is set inside the housing and is used to suck in the silt agitated by the cutter head 11 and transport it to the conveying pipe 3.

[0064] Crucially, an inclined guide plate 2 is provided on the sludge-facing side of the cutter head 11 (i.e., the direction in which the sludge enters the cutter head 11). The function of the guide plate 2 is to initially guide the flow of the sludge. A pushing mechanism 5 is provided on the guide plate 2.

[0065] The pushing mechanism 5 is used to actively push the silt in the area of ​​the guide plate 2 toward the cutter head 11. The pushing mechanism 5 includes at least one movable plate 51. The movable plate 51 is capable of reciprocating along the surface of the guide plate 2, that is, moving towards and away from the cutter head 11. The first power mechanism 6 drives the reciprocating motion of the movable plate 51.

[0066] In a preferred embodiment, the first power mechanism 6 may include a crankshaft 61 driven by a first power assembly 62. The crankshaft 61 is hinged to different movable plates 51 via multiple connecting rods 63. Rotation of the crankshaft 61 causes the connecting rods 63 to drive the movable plates 51 in reciprocating linear motion. The first power assembly 62 includes an electric motor and a reducer.

[0067] Each movable plate 51 is hinged with at least one lever 52. The lever 52 is key to achieving active pushing.

[0068] Its working principle is as follows:

[0069] When the first power mechanism 6 drives the moving plate 51 to move closer to the auger 11, the resistance of the silt will cause the lever 52 to tend to flip away from the auger 11. In this embodiment, the lever 52 is disposed in the mounting groove 53 opened on the moving plate 51, and the lever 52 is rotatably connected to the end of the mounting groove 53 away from the auger 11, as shown in the attached figure. Figure 3 As shown, as the moving plate 51 moves further toward the cutter head 11, the resistance of the sludge pushes the paddle 52 to flip away from the cutter head 11 until the paddle 52 abuts against the end wall of the mounting groove 53 away from the cutter head 11. At this time, the paddle 52 and the moving plate 51 are in an open state, thus pushing the sludge downward with a larger working area.

[0070] When the first power mechanism 6 drives the moving plate 51 to move away from the reamer 11, the resistance of the sludge will make the paddle 52 turn towards the reamer 11, so that the paddle 52 is retracted into the installation groove 53, at this time, the paddle 52 and the moving plate 51 are in a folded state, which sufficiently reduces the resistance during movement and avoids driving the sludge upwards.

[0071] In order to realize more continuous sludge pushing, a plurality of moving plates 51 can be provided. The movement phases of adjacent moving plates 51 are opposite. For example, when one moving plate 51 is performing a working stroke away from the reamer 11, its adjacent moving plate 51 is performing a return stroke towards the reamer 11. In this way, it can be ensured that there is always a moving plate 51 pushing the sludge towards the reamer 11, so that the sludge supply is more continuous and stable.

[0072] In order to ensure that the paddle 52 can be reliably opened when moving towards the reamer 11, a trigger block 21 corresponding to the paddle 52 can be provided on the sludge guide plate 2. At the same time, a corresponding abutting shoulder 521 is provided on the paddle 52. When the moving plate 51 moves to the end of the stroke towards the reamer 11 or a specific position in the process, the abutting shoulder 521 on the paddle 52 abuts against the trigger block 21 on the sludge guide plate 2, forcing the paddle 52 to lift to an open state, preparing for the next working stroke away from the reamer 11.

[0073] When the moving plate 51 moves to the position of the trigger block 21 away from the reamer 11, the paddle 52 on the moving plate 51 changes from a folded state to an open state. At this time, the other moving plate 51 adjacent to it is moving towards the reamer 11 and is in an open state. In this way, the open paddles 52 on the two adjacent moving plates 51 move towards each other, thus having a shearing effect similar to scissors, as shown in the accompanying drawings. Figure 8 In this way, under the cooperation of the adjacent moving plates 51, the paddles 52 continuously interleave, which can shear, break and agitate the sludge about to enter the inlet of the suction shovel 1, effectively preventing the sludge from clumping or jamming at this point.

[0074] The outlet of the auger 12 is connected to the conveying pipe 3, which is used to convey the slurry to the outside of the water sump or to a designated location. In order to improve the conveying efficiency and prevent the sludge from settling and clogging in the long-distance conveying pipe 3, a pulse airflow mechanism 4 is provided.

[0075] The pulse airflow mechanism 4 includes a pulse air pump 43, which is connected to a plurality of air supply assemblies 41 provided on the conveying pipe 3 through an air supply hose 42.

[0076] In one embodiment, a temporary storage tank 40 is arranged between the screw conveyor 12 and the conveying pipe 3, which is used to buffer and stabilize the sludge flow output from the screw conveyor 12 and serves as the starting point of the pulse air flow. The pulse air pump 43 is also connected to the temporary storage tank 40 through the air supply hose 42 and is connected to a plurality of air supply assemblies 41 arranged at intervals on the conveying pipe 3.

[0077] The conveying pipe 3 itself can be formed by alternately and intervaliy connecting a plurality of hose segments 31 and hard pipe segments 32, which not only ensures the flexibility of the whole but also facilitates the installation of the air supply assemblies 41 on the hard pipe segments 32.

[0078] In order to support the conveying pipe 3, especially when the conveying distance is long, a guide rail 8 is arranged, and a plurality of load-bearing seats 81 are slidingly connected to the guide rail 8. The conveying pipe 3 is hung on the load-bearing seats 81.

[0079] Each air supply assembly 41 is installed on a hard pipe segment 32. The hard pipe segment 32 is provided with a gas guide hole 321 and is internally provided with a piston 322. The air supply assembly 41 includes a cylinder body 411, which is slidingly sleeved on the outside of the piston 322 and is fixedly connected to the load-bearing seat 81. The piston 322 and the cylinder body 411 form an air charging cavity 412 therebetween, which is in communication with the pulse air pump 43 through the air supply hose 42. The cylinder body 411 is provided with a plugging wall 413 capable of plugging the gas guide hole 321.

[0080] The piston 322 can move within the cylinder 411, having a first position and a second position. In the first position, the blocking wall 413 just blocks the air guide hole 321 on the hard pipe section 32. A return spring 414 is arranged between the cylinder 411 and the piston 322, which tends to keep the piston 322 in the first position. When the pulse air pump 43 delivers compressed air into the air charging cavity 412, the air pressure in the air charging cavity 412 rises, thereby generating a pushing force on the piston 322. When the pushing force is sufficient to overcome the elastic force of the return spring 414 and other resistance, the piston 322 is pushed to the second position. In the second position, the blocking wall 413 leaves the air guide hole 321, so that the air charging cavity 412 is in communication with the inside of the delivery pipe 3 through the air guide hole 321, and the compressed air is injected into the slurry in the delivery pipe 3. When the pulse air pump 43 stops supplying air or enters a low pressure period, the air pressure in the air charging cavity 412 decreases, and the return spring 414 pushes the piston 322 back to the first position, and the blocking wall 413 again blocks the air guide hole 321, waiting for the next pulse. By controlling the air charging timing of each air supply assembly 41 through the pulse air pump 43, air clusters can be formed in the delivery pipe 3 to stir the slurry, reduce viscosity, provide delivery power, and effectively prevent blockage. At the same time, the intermittent shaking of the soft pipe section 31 caused by the movement of the piston 322 on the cylinder 411 can prevent the slurry from being blocked in the soft pipe section 31. The solid particles in the slurry will gradually settle to the bottom of the soft pipe section 31 under the action of gravity, forming a sediment layer. At the same time, the viscosity of the slurry can cause it to adhere to the inner wall of the soft pipe section 31. The intermittent shaking gives the soft pipe section 31 and the slurry inside it a short mechanical impact. This impact can re-suspend the settled particles in the liquid and weaken the adhesion between the slurry and the inner wall of the soft pipe section 31, causing the adhered slurry to fall off.

[0081] In order to enable the dredging device to move within the sump to clean different areas of sludge, a second power mechanism 7 is provided. The second power mechanism 7 is connected to the machine body 9 through a constant force spring 74. The constant force spring 74 functions to maintain a relatively constant pulling or pushing force on the machine body 9 during traction, so that the suction shovel 1 can stably contact the sludge layer at the bottom of the sump, which helps to prevent the suction shovel 1 from being overloaded.

[0082] Specifically, compared with the traditional driving mode, the traditional driving mode is to directly drive the suction shovel 1 to move through the traction device. When the moving speed of the traction device is too fast, or the hardness of the sludge is large, the sludge entering speed of the suction shovel 1 exceeds its sludge discharging speed, causing the sludge in the suction shovel 1 to continuously accumulate and press each other, thereby increasing the density of the sludge, and finally causing the suction shovel 1 to be overloaded or even stalled.

[0083] The second power mechanism 7 moves intermittently, i.e. the second power mechanism 7 only moves a set distance and then stops. The second power mechanism 7 is connected to the body 9 by a constant force spring 74. When the suction shovel 1 moves faster than the discharge speed, the sludge will accumulate in the suction shovel 1, causing the suction shovel 1 to move away from the second power mechanism 7, and the distance between the two increases, causing the constant force spring 74 to be stretched, so that the suction shovel 1 can stably contact the sludge layer at the bottom of the sump. During the stop of the second power mechanism 7, the suction shovel 1 can still stably contact the sludge layer at the bottom of the sump under the action of the constant force spring 74. As the suction shovel 1 discharges the sludge, the suction shovel 1 will gradually move towards the second power mechanism 7 under the action of the constant force spring 74. When the distance between the suction shovel 1 and the second power mechanism 7 returns to the predetermined value, the second power mechanism 7 is restarted. In this embodiment, the suction shovel 1 and the second power mechanism 7 can be provided with a position sensor, which is triggered when the distance between the suction shovel 1 and the second power mechanism 7 returns to the predetermined value, and the second power mechanism 7 is started.

[0084] In a specific embodiment, a rack 70 is fixedly connected to the guide rail 8. The second power mechanism 7 includes a traction frame 71 that is slidingly connected to the guide rail 8. The traction frame 71 is provided with a second power assembly 73, which drives a traction wheel 72 to rotate. The traction wheel 72 is a gear that engages with the rack 70. By controlling the second power assembly 73 to drive the traction wheel 72 to rotate forward and backward, the traction frame 71 can accurately move along the guide rail 8. Since the traction frame 71 is connected to the body 9 by the constant force spring 74, the movement of the traction frame 71 will drive the entire dredging device to move along the guide rail 8. The second power assembly 73 includes an electric motor and a speed reducer.

[0085] The working process of the present application is as follows:

[0086] During dredging, the entire device is placed in the mine sump, so that the suction shovel 1 contacts the sludge. The first power mechanism 6 and the auger 11 and the screw conveyor 12 of the suction shovel 1 are started. At the same time, the second power mechanism 7 is started, and the second power mechanism 7 moves intermittently. The first power mechanism 6 drives the pushing mechanism 5 to work, and the push piece 52 on the moving plate 51 actively pushes the sludge away from the auger 11. The auger 11 stirs and breaks up the sludge, and the screw conveyor 12 sucks and transports the sludge into the delivery pipe 3. The pulse air pump 43 is started, and the pulse air flow mechanism 4 starts to work, injecting pulse air flow into the delivery pipe 3 through each air supply assembly 41, assisting the sludge to flow in the delivery pipe 3, until it is discharged from the sump. The constant force spring 74 ensures that the suction shovel 1 stably contacts the sludge layer.

[0087] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Based on the above description, any other variations or changes can be made by those skilled in the art without departing from the spirit and principles of the present application. It is not necessary to list all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall fall within the scope of the claims of the present application.

Claims

1. A mine sump dredging device comprising a body, on which a suction shovel for sucking sludge is provided, characterized in that, The suction shovel comprises a reamer for sucking external sludge and an auger for conveying sludge, the auger is connected with a conveying pipe, and the conveying pipe is provided with a pulse air flow mechanism; The mud-facing side of the reamer is provided with a guide plate which is obliquely arranged, and the guide plate is provided with a pushing mechanism, The pushing mechanism comprises a moving plate, the moving plate is connected with a first power mechanism, the first power mechanism can drive the moving plate to reciprocate along the guide plate to approach or move away from the reamer, and a push piece is hingedly connected to the moving plate; When the first power mechanism drives the moving plate to move in the direction of approaching the reamer, the push piece and the moving plate are in an open state; when the first power mechanism drives the moving plate to move in the direction of moving away from the reamer, the push piece and the moving plate are in a closed state; Further comprising a second power mechanism, a constant force spring is connected between the second power mechanism and the machine body, and the second power mechanism can move intermittently; The moving plate is provided in plurality, and the movement phases of adjacent moving plates are opposite; The guide plate is provided with a trigger block corresponding to the push piece, and the push piece is provided with an abutting shoulder matched with the trigger block; When the abutting shoulder abuts against the trigger block, the push piece and the moving plate are in an open state.

2. A mine sump dredging device according to claim 1, characterised in that, The first power mechanism comprises a rotatable crankshaft, the crankshaft is drivingly connected with a first power assembly, a plurality of rotatable connecting rods are arranged on the crankshaft, and one end of each connecting rod is hingedly connected to the moving plate.

3. The mine sump dredging device of claim 1, wherein, The pulse air flow mechanism comprises a temporary storage tank arranged between the auger and the conveying pipe, and a plurality of air supply assemblies are arranged at intervals on the conveying pipe, the temporary storage tank and the air supply assemblies are connected with a pulse air pump through an air supply hose.

4. A mine sump dredging device as claimed in claim 3, characterised in that, Further comprising a guide rail, a plurality of load-bearing seats are slidingly connected to the guide rail, and the conveying pipe is hung on the load-bearing seats.

5. A mine sump dredging device as claimed in claim 4, characterised in that, The conveying pipe comprises a plurality of alternately and intervaliy connected hose sections and hard pipe sections, the hard pipe sections are provided with air guide holes and pistons; The air supply assembly comprises a cylinder body which is slidingly sleeved on the outside of the piston, the cylinder body is fixedly connected with the load-bearing seat, an inflation cavity is formed between the piston and the cylinder body, the inflation cavity is connected with the pulse air pump, and the cylinder body is provided with a blocking wall which can block the air guide hole; The piston has a first position and a second position, when the piston is in the first position, the blocking wall blocks the air guide hole; When the piston is in the second position, the inflation cavity is in communication with the air guide hole; A return spring is arranged between the cylinder body and the piston, and the return spring makes the piston have a tendency to remain in the first position; The air pressure of the inflation cavity makes the piston have a tendency to move towards the second position; The pulse air pump is also connected with the inflation cavity through the air supply hose.

6. A mine sump dredging device as claimed in claim 4, characterised in that, The guide rail is fixedly connected with a rack; The second power mechanism comprises a traction frame which is slidingly connected with the guide rail, the traction frame is provided with a traction wheel which is engaged with the rack, and the traction wheel is connected with a second power assembly.

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