Irrigation underwater coal mining and conveying machine and system

Abstract

The utility model provides an irrigation underwater coal mining and conveying machine and system. The cutterhead is arranged at the advancing direction end of the vehicle body, the delivery pump and the sinking and floating box are arranged on the vehicle body, a feeding port is formed in the front end of the cutterhead, a discharging port is formed in the delivery pump, the feeding port is communicated with the delivery pump and the discharging port, and the sinking and floating box is communicated with the feeding port. A driving cylinder used for driving the cutterhead to pitch is hinged between the cutterhead and the vehicle body, a containing cavity is formed in the sinking and floating box, and a second driving source used for filling or discharging water into the containing cavity is arranged on the side of the sinking and floating box. The movable vehicle body is arranged, and the cutter head is arranged at the front end of the vehicle body, so that unmanned underground mine tunneling type coal mining and conveying can be realized, a plurality of vertical shafts or inclined holes do not need to be formed, the mining efficiency is improved, and the mining range is wider and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of mining, in particular to a water-filled underwater coal mining and conveying machine and a system. Background Art

[0002] Underground mineral deposits are usually located below groundwater. When mining, the groundwater must be completely pumped out before mining can be carried out manually. This method results in a long mining cycle, high costs, and is prone to accidents such as landslides in the mined-out area. Manual mining is also prone to casualties.

[0003] For example, the unmanned underground drilling hydraulic coal mining method and its special device disclosed in the existing patent announcement number CN1189641C adopts two boreholes, one straight and one inclined, to form a mining channel. The straight hole, i.e., the vertical shaft, is used as the mining well. After the well is completed, the coal body is cut and crushed by high-pressure water jet. The crushed coal is lifted by gas lift to form a coal-water mixing chamber of a certain volume at the bottom of the well. Then, an inclined hole is drilled in the upward direction of the coal seam of the mining well. The inclined hole will eventually be connected to the mining well, and the coal body within the control range of the vertical shaft and the inclined hole will be gradually cut and crushed by jet. The crushed coal moves to the bottom of the mining well under the influence of gravity and water flow, and then is lifted to the surface by gas lift.

[0004] Although this method solves the unsafe problem of manual underground coal mining, its mining range is small and mining can only be carried out around the vertical shaft. If the entire mining area is to be mined, many vertical shafts need to be drilled or multiple inclined holes need to be set up, which will undoubtedly increase production costs and is difficult to implement in reality. Utility Model Content

[0005] The utility model aims to provide a water-filled underwater coal mining and conveying machine and system, which can realize excavation-type mining without opening multiple vertical shafts or inclined holes, thereby improving mining efficiency.

[0006] The technical solution of the utility model is: a water-filled underwater coal mining and conveying machine, comprising a water-filling device, a vehicle body, a cutter head arranged at the forward direction end of the vehicle body, and a conveying pump and a sinking and floating box arranged on the vehicle body;

[0007] The front end of the cutter disc is provided with a feed port, and the front end of the delivery pump is connected to the cutter disc; or, the feed port is separated from the cutter disc so that the cutter disc and the feed port form separate operating units, the front end of the delivery pump is connected to a feed hopper, the feed port is provided on the feed hopper, and the cutter disc is arranged above the feed hopper;

[0008] The delivery pump is provided with a discharge port, the feed port is connected with the delivery pump and the discharge port, a drive cylinder for driving the pitch of the cutter disc is hinged between the cutter disc and the vehicle body, a accommodating cavity is provided in the buoyancy box, and a second drive source for filling or draining water into the accommodating cavity is provided on the side of the buoyancy box;

[0009] The irrigation device comprises a water supply device and a water level controller. The water supply pipeline of the water supply device 300 is connected to the mine entrance, and the water level controller is installed at the mine entrance.

[0010] In the above scheme, by providing a movable vehicle body and a cutter head at the front end of the vehicle body, excavation can be achieved without opening multiple shafts or inclined holes, thereby improving the mining efficiency and expanding the mining range. The accommodating cavity is used to place the aqueous solution.

[0011] In a specific technical solution, when the front end of the delivery pump is connected to the cutter disc, the cutter disc includes a cutter shaft, a cutter holder, a cutter head and a first branch pipe, one end of the cutter shaft is rotatably disposed in the first branch pipe, and a first driving source for driving the cutter shaft to rotate is installed on the first branch pipe, the cutter holder is disposed at the front end of the cutter shaft, the feed port is disposed on the cutter holder, the cutter heads are evenly distributed on the cutter holder, the cutter shaft, the first branch pipe and the interior of the delivery pump are connected, and the feed port is disposed on the cutter holder; the cutter holder is in a grid shape, each grid hole forms the feed port, and the cutter head is disposed at the edge of each grid hole.

[0012] Preferably, a water cavity is provided inside the water level controller, a float is floated in the water cavity, a first sensor is provided on the inner bottom surface of the water level controller, a second sensor is provided on the inner top surface, and an inlet and outlet are provided at the bottom of the water level controller, and the inlet and outlet are communicated with the water cavity.

[0013] In another specific technical solution, when the front end of the delivery pump is connected to a feed hopper, a feed roller is rotatably provided in the feed hopper.

[0014] Preferably, the first driving source includes a first motor and a reducer installed on the first branch pipe, and a driving gear sleeved on the knife shaft, the first motor and the reducer are connected, and the output end of the reducer is connected to the driving gear.

[0015] Preferably, the conveying pump includes a suction pipe, a pump body and a second motor connected in sequence, the suction pipe is connected to the rear end of the cutter disc, or the suction pipe is connected to the feed hopper, the pump body is provided with a second branch pipe, and the discharge port is provided at the end of the second branch pipe.

[0016] Preferably, the second motor is an oil-immersed motor, which is provided with a first zone and a second zone, a pressure-balancing piston is reciprocated between the first zone and the second zone to balance the pressure between the first zone and the second zone, and a plurality of holes are provided on the side wall of the second zone.

[0017] Preferably, the vehicle body includes a frame, running wheels and legs installed at the front and rear ends of the frame, the delivery pump and the buoyancy tank are placed on the frame, and the running wheels are oil-immersed motor wheels.

[0018] Preferably, the second driving source includes a third motor, a drainer electrically connected to the third motor, a water outlet pipe connected to the drainer, and a water supply pipe connected to the third motor; the third motor and the drainer are installed on the vehicle body, and the water outlet pipe and the water supply pipe are both connected to the accommodating cavity.

[0019] The utility model also provides a water-filled underwater coal mining and conveying system, including a coal storage pool and a water supply device placed outside the mine, and the above-mentioned water-filled underwater coal mining and conveying machine placed under the mine, wherein the discharge port is connected to the coal storage pool through a conveying pipeline, and the water supply device is respectively connected to the buoyancy box and the mine.

[0020] Compared with the related art, the beneficial effects of the utility model are:

[0021] 1. The utility model is provided with a movable vehicle body, and a cutter head is provided at the front end of the vehicle body, so as to realize excavation-type mining. A coarse-grained slurry pump is provided in the middle of the vehicle body, so as to transport the mined coal in the underground excavation of the coal mine to the surface of the mining area, without the need to open multiple shafts or inclined holes, thereby improving the mining efficiency and expanding the mining range;

[0022] 2. Fill water in mines and goafs, use water to replace the goaf space of coal beds, reduce the explosion hazards of gas and dust, and improve safety.

[0023] 3. Filling the goaf with water increases the lifting force of the roof of the goaf, making it less likely to collapse. It also reduces the lift of the delivery pump, reduces power consumption of the delivery pump, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the water-filled underwater coal mining and transportation system provided by the utility model;

[0025] Figure 2 A schematic diagram of the three-dimensional structure of the water-flooded underwater coal mining and conveying machine according to the first embodiment of the utility model;

[0026] Figure 3 A schematic top view of a water-filled underwater coal mining and conveying machine according to the first embodiment of the utility model;

[0027] Figure 4 is a schematic diagram of the connection structure between the cutter disc and the first driving source;

[0028] Figure 5 It is a schematic diagram of the structure of the delivery pump;

[0029] Figure 6 This is a schematic diagram of the installation structure of the sinking and floating box;

[0030] Figure 7 It is a schematic diagram of the internal structure of the water level controller;

[0031] Figure 8 A schematic diagram of the three-dimensional structure of the water-flooded underwater coal mining and conveying machine according to the second embodiment of the utility model;

[0032] Fig. 9 for Figure 8 Schematic diagram of the connection structure between the cutter disc and the first driving source.

[0033] In the attached drawings: 1, vehicle body; 11, vehicle frame; 12, running wheels; 13, outriggers; 2, delivery pump; 21, suction pipe; 22, pump body; 23, second motor; 231, first zone; 232, second zone; 233, flat pressure piston; 234, hole; 24, second branch pipe; 25, discharge port; 3, cutter disc; 31, cutter shaft; 32, cutter holder; 33, cutter head; 34, feed port; 35. Bearing; 36. First branch pipe; 37. Connecting arm; 38. Central axis; 4. Driving cylinder; 5. Sinking and buoyancy box; 6. Cable; 7. Wire rope; 8. Conveying pipeline; 9. First driving source; 10. Second driving source; 111. Camera; 112. Mounting frame; 113. Buckle; 114. First bracket; 115. Second bracket; 100. Water-filled underwater coal mining and conveying machine; 200. Conveying device; 300. Water supply device; 400. Hoisting equipment; 500. Coal storage tank; 600. Control equipment; 700. Water level controller; 701. Float; 702. First sensor; 703. Second sensor; 704. Inlet and outlet; 705. Water cavity; 14. Feed hopper; 15. Feed roller; 16. Third driving source; 17. Control center. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0035] Embodiment 1

[0036] like Figure 1 As shown, a water-flooded underwater coal mining and conveying system provided in this embodiment includes a water-flooded device, a water-flooded underwater coal mining and conveying machine 100, a conveying device 200, a lifting device 400, a coal storage tank 500 and a control device 600, and the water-flooded device includes a water supply device 300 and a water level controller 700.

[0037] like Figure 2 As shown, it includes a vehicle body 1, a delivery pump 2, a cutter head 3, a drive cylinder 4, a sinking and floating box 5, a cable 6, a steel wire rope 7, a delivery pipeline 8, a first drive source 9, a second drive source 10, and a camera 111.

[0038] like Figure 2 , Figure 3 As shown, the vehicle body 1 includes a frame 11, running wheels 12 and legs 13 installed at the front and rear ends of the frame 11. The running wheel 12 is an oil-immersed motor wheel, and its outer surface is provided with paddle blades. When rotating, the paddle blades stir the water flow to drive the coal mining and conveying machine to swim forward in the water. The legs 13 are electric cylinders, and there are four or more of them. They must have a waterproof function. During vertex mining, the legs 13 need to be extended to support the coal machine and provide stability for mining work. There are four or more running wheels 12, and each running wheel 12 is embedded with a flat-pressure oil-immersed motor for driving rotation.

[0039] like Figure 4 As shown, the cutter disc 3 includes a cutter shaft 31, a cutter holder 32, a cutter head 33, a first branch pipe 36 and a bearing 35. The first driving source 9 includes a first motor 91, a reducer 92 and a driving gear 93.

[0040] The knife shaft 31 and the first branch pipe 36 are both cylindrical structures with two ends connected. One end of the knife shaft 31 extends into the interior of the first branch pipe 36, and the other end extends out of the first branch pipe 36 and is connected to the knife holder 32. The knife shaft 31 is mounted with the bearing 35 and the driving gear 93 on one end inside the first branch pipe 36, and the outer ring of the bearing 35 is fixed to the inner wall of the first branch pipe 36. The first branch pipe 36 is a rigid tube, and the first motor 91 is installed on the outer surface of the upper side wall thereof. The output end of the reducer 92 is connected to the driving gear 93.

[0041] The tool holder 32 is a grid-shaped conical structure, each grid hole forms the feed port 34, and the cutter head 33 is arranged at the edge of each grid hole. The cutter head 33 is a blade inclined forward, and during rapid rotation, the ore is mined and large pieces of coal are crushed into small pieces for easy transportation. The first motor 91 is a flat-pressure oil-immersed motor, which has the same functional model as the second motor 23 and the third motor 101, and all are purchased parts. The oil-immersed motor is a common type of motor. Its principle is to immerse the motor components in insulating oil to improve the insulation and heat dissipation performance of the motor. Therefore, it has good sealing performance and can be waterproof. In addition, all driving components in the utility model need to be selected with waterproof function.

[0042] like Figure 5 As shown, the delivery pump 2 is mounted on the vehicle frame 11, and comprises a suction pipe 21, a pump body 22 and a second motor 23 connected in sequence, the suction pipe 21 is connected to the first branch pipe 36 of the cutter disc 3, the pump body 22 is provided with a second branch pipe 24, and the discharge port 25 is provided at the end of the second branch pipe 24. The delivery pump 2 is used to suck the coal cut by the cutter disc 3 and deliver it from the delivery pipeline 8 to the coal storage pool 500.

[0043] The second motor 23 is an oil-immersed motor, which is provided with a first area 231 (oil storage area) and a second area 232 (water storage area). The first area 231 contains non-conductive transformer oil. A pressure-equalizing piston 233 is reciprocated between the first area 231 and the second area 232 to balance the pressure between the first area 231 and the second area 232, and a plurality of holes 234 are provided on the side wall of the second area 232. A retaining ring 235 is also provided in the second motor 23 to limit the rightward movement of the pressure-equalizing piston 233, and the retaining ring 235 is fixed on the inner wall of the second area 232.

[0044] like Figure 2 As shown, the feed port 34, the blade shaft 31, the first branch pipe 36, the suction pipe 21, the second branch pipe 24 and the discharge port 25 are connected. A drive cylinder 4 for driving the blade disc 3 to pitch is hinged between the blade disc 3 and the vehicle body 1. The drive cylinder 4 is a telescopic electric cylinder that can swing the blade disc 3 up and down. When it is necessary to move left and right, the entire vehicle needs to be offset by the walking wheel 12. The suction pipe 21 is designed to be a flexible hose, such as a hard corrugated pipe, to adapt to the angle of the blade disc 3.

[0045] like Figure 2 As shown, the buoyancy box 5 is mounted on the frame 11 through a mounting frame 112 and is placed above the delivery pump 2. The buoyancy box 5 is mounted on the upper end of the mounting frame 112 through a buckle 113, and the lower end of the mounting frame 112 is connected to the frame 11.

[0046] like Figure 3 , Figure 6 As shown, a receiving chamber for receiving aqueous solution is provided in the buoyancy box 5 , and a second driving source 10 for filling or draining water into the receiving chamber is provided on the side of the buoyancy box 5 .

[0047] The second driving source 10 includes a water supply pipe 103, a third motor 101, a drainer 102 electrically connected to the third motor 101, and a water outlet pipe 104 connected to the drainer 102. The third motor 101 and the drainer 102 are installed on the vehicle body 1, and the water outlet pipe 104 and the water supply pipe 103 are both connected to the accommodating cavity. The third motor 101 is also an oil-immersed motor. The water supply pipe 103 is connected to the water supply pump in the water supply device 300. The drainer 102 is an outsourced part, which is provided with a drainage hole for pumping water in the accommodating cavity out of the drainage hole through the water outlet pipe 104. In addition, the drainer 102 can also be replaced by a water pump.

[0048] The above-mentioned oil-immersed motor can be equipped with a piston-type hydraulic balancer, in which the inner cavity of the motor and the inner cavity of the balancer are filled with oil. When the motor dives or rises, the piston moves due to the change in pressure (for example, the piston moves inward when the pressure is high, and the piston moves outward when the pressure decreases), keeping the pressure of the inner cavity of the motor the same as the diving environment, so as to protect the motor from diving and affecting the normal operation of the motor due to the diving pressure.

[0049] The buoyancy box 5 is used to assist the underwater coal mining and conveying machine in moving. If the coal seam floor is uneven and the traveling wheels 12 cannot move, the drainer 102 is started to drain the water in the buoyancy box 5 until the obstacle is crossed, and then the water pump is started to fill the accommodating cavity with water to allow the coal mining and conveying machine to sink and continue the coal mining and conveying work. Specifically:

[0050] When the water-filled underwater coal mining and conveying machine dives, the equalizing piston 233 is driven to move leftward, and water enters the second area 232 from the hole 234. When the pressure of the first area 231 and the second area 232 are balanced, the equalizing piston 233 stops. When the water-filled underwater coal mining and conveying machine dives upward, the equalizing piston 233 is driven to move rightward, and water is discharged from the hole 234 until the pressure of the first area 231 and the second area 232 are balanced, and the equalizing piston 233 stops.

[0051] like Figure 1 , Figure 2 As shown, the hoisting device 400 is installed outside the mine, and the steel wire rope 7 on the hoisting device 400 is connected to the car body 1 to place the coal mining and conveying machine 100 at the bottom of the mine. A conveying device 200, a coal storage pool 500 and a water supply device 300 are also provided outside the mine. The conveying device 200 includes two rollers that are a group and rotate with each other, and a conveying pipe 8 is connected to the discharge port 25. The conveying pipe 8 passes through between the two rollers and communicates with the coal storage pool 500. The coal storage pool 500 has a sedimentation function, such as a screen that can separate water from coal, and the lower end of the screen is a water storage pool. A return pipe 501 is provided at the bottom of the water storage pool, and the return pipe 501 is connected to the mine. When the coal and water enter the coal storage pool 500 from the conveying pipe 8 together, the water settles in the coal storage pool 500 to separate the coal from the water, and the separated water returns to the mine from the return pipe 501, and the separated coal is extracted. The vehicle body 1 is provided with a control center 17 , through which instructions are sent to the coal mining and conveying machine 100 .

[0052] The water supply pump in the water supply device 300 is connected to the sinking and floating box 5 and the mine respectively. In addition to supplying water, the water supply device 300 can also control the water level in the mine. For example, a water level controller 700 is set in the mine, and the water level controller 700 is electrically connected to the water supply device 300 and the control device 600 to keep the system working water level unchanged.

[0053] like Figure 7As shown, the water level controller 700 is provided with a water cavity 705 inside, and a floating ball 701 is floating in the water cavity 705. A first sensor 702 is provided on the inner bottom surface of the water level controller 700, a second sensor 703 is provided on the inner top surface, and an inlet and outlet 704 is provided at the bottom of the water level controller 700, and the inlet and outlet 704 is communicated with the water cavity 705. When the water flows into the water cavity 705 of the water level controller 700 from the inlet and outlet 704, the floating ball 701 floats up. When the floating ball 701 floats up and triggers the second sensor 703, the water level exceeds the upper limit, and the second sensor 703 sends a signal to the control device 600 to turn off the water supply pump of the water supply device 300. The water in the water cavity 705 is discharged from the inlet and outlet 704, causing the floating ball 701 to sink. When the float 701 sinks and triggers the first sensor 702, the water level is lower than the lower limit, and the second sensor 703 sends a signal to the control device 600 to turn on the water supply pump of the water supply device 300. The first sensor 702 and the second sensor 703 are both waterproof proximity switches.

[0054] The control device 600 is used for centralized sending of instructions for power supply, water supply, mining, etc., and includes an operating platform and a computer and other equipment. The power supply cable 6 outputted by the control device 600 is connected to the water-filled underwater coal mining and conveying machine. Figure 2 As shown, the cable 6, the steel wire rope 7 and the conveying pipeline 8 are tied together in the mine. In order to facilitate the underwater coal mining and conveying machine to have a sufficient excavation stroke, the cable 6 needs to have a sufficient length, and wireless communication connection can also be used. A pipeline expansion device can be arranged in the conveying pipeline 8 to adjust the length of the conveying pipeline 8. The pipeline expansion device is a purchased part.

[0055] like Figure 7 As shown, cameras 111 are provided at both ends of the buoyancy box 5, and the cameras 111 can collect image information and transmit it to the control device 600 to output corresponding instructions.

[0056] The working method of the underwater coal mining and transportation system provided by the utility model is:

[0057] S1, drill a vertical shaft (mine) in the coalfield area and Figure 1 The structure shown is used to install various devices;

[0058] S2, hoisting the water-filled underwater coal mining and conveying machine to the bottom of the shaft by means of the hoisting equipment 400, and adjusting the pipelines;

[0059] S3, collecting water level information in the shaft through the water level controller 700. If the water level is insufficient, turn on the water supply pump of the water supply device 300 to fill water into the mine to reach a suitable water level.

[0060] S4, start the water-filled underwater coal mining and conveying machine 100 to start coal mining, the coal is mixed with water, and under the action of the conveying pump 2, the coal and water enter the inside of the cutter shaft 31 from the feed port 34 of the cutter holder 32, and then fall into the coal storage pool 500 from the suction pipe 21, the second branch pipe 24, and the conveying pipeline 8 for sedimentation, and the precipitated water is recharged into the mine entrance.

[0061] During the mining process, the hoisting equipment 400 is used to adjust the position of the conveying pipeline 8 .

[0062] like Figure 1 As shown, the mine and the goaf are filled with water, and the pressure of the water is used to prevent the upper layer of the goaf from collapsing, and there is no need to install a supporting structure to prevent collapse.

[0063] The water-flooded underwater coal mining and conveying machine 100 generally adopts layer-by-layer mining from top to bottom.

[0064] Embodiment 2

[0065] like Figure 8 As shown, the first embodiment is repeated, except that, in this embodiment, the front end of the suction pipe 21 of the delivery pump 2 is connected to the feed hopper 14. The feed port 34 is arranged on the feed hopper 14. A feed roller 15 is arranged in the feed hopper 14, and the feed roller 15 is placed in front of the feed port 34. The feed roller 15 is driven to rotate by a third driving source 16 (motor, belt and pulley).

[0066] The cutter head 3 is arranged above the feed hopper 14. Fig. 9 As shown, in this embodiment, a first bracket 114 is fixed on the frame 11, and a second bracket 115 is hinged on the front side of the first bracket 114. The driving cylinder 4 is connected between the first bracket 114 and the second bracket 115. The cutter disc 3 includes a connecting shaft 37. The outer surface of the connecting shaft 37 is fixed to the end of the second bracket 115 away from the first bracket 114. A central shaft 38 is rotatably provided inside the connecting shaft 37 through a bearing, and the central shaft 38 is driven to rotate by a first driving source 9 (such as a motor, a gear set, a chain, etc.). A tool holder 32 is mounted on the outer cylindrical surface at both ends of the central shaft 38, and the tool holder 32 rotates with the central shaft 38. The tool holder 32 is a plurality of cutter heads 33 arranged on the cylindrical wall.

[0067] Embodiment 3

[0068] Repeat Example 2, except that Figure 8 As shown, in this embodiment, the walking wheel 12 is a crawler, which can be implemented under different mining conditions.

[0069] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water-filled underwater coal mining and conveying machine, characterized in that: It comprises a water filling device, a vehicle body (1), a cutter disc (3) arranged at the end of the vehicle body (1) in the forward direction, and a delivery pump (2) and a sinking and floating box (5) arranged on the vehicle body (1); The front end of the cutter disc (3) is provided with a feed port (34), and the front end of the delivery pump (2) is connected to the cutter disc (3); or, the feed port (34) is separated from the cutter disc (3) so that the cutter disc (3) and the feed port (34) form separate operating units, the front end of the delivery pump (2) is connected to a feed hopper (14), the feed port (34) is provided on the feed hopper (14), and the cutter disc (3) is arranged above the feed hopper (14); The delivery pump (2) is provided with a discharge port (25), the feed port (34) is in communication with the delivery pump (2) and the discharge port (25), a drive cylinder (4) for driving the cutter disc (3) to pitch is hingedly connected between the cutter disc (3) and the vehicle body (1), a accommodating chamber is provided in the buoyancy box (5), and a second drive source (10) for filling or draining water into the accommodating chamber is provided on the side of the buoyancy box (5); The irrigation device comprises a water supply device (300) and a water level controller (700); the water supply pipeline of the water supply device (300) is connected to the mine entrance, and the water level controller (700) is installed at the mine entrance.

2. The water-flooded underwater coal mining and conveying machine according to claim 1, characterized in that: When the front end of the delivery pump (2) is connected to the cutter disc (3), the cutter disc (3) comprises a cutter shaft (31), a cutter holder (32), a cutter head (33) and a first branch pipe (36); one end of the cutter shaft (31) is rotatably disposed in the first branch pipe (36), and a first driving source (9) for driving the cutter shaft (31) to rotate is installed on the first branch pipe (36); the cutter holder (32) is disposed at the front end of the cutter shaft (31); the feed port (34) is disposed on the cutter holder (32); the cutter heads (33) are evenly distributed on the cutter holder (32); the cutter shaft (31), the first branch pipe (36) and the interior of the delivery pump (2) are connected; the feed port (34) is disposed on the cutter holder (32); the cutter holder (32) is in a grid shape, each grid hole forms the feed port (34), and the cutter head (33) is disposed at the edge of each grid hole.

3. The water-flooded underwater coal mining and conveying machine according to claim 1, characterized in that: The water level controller (700) is provided with a water cavity (705) inside, a floating ball (701) is provided floatingly in the water cavity (705), a first sensor (702) is provided on the inner bottom surface of the water level controller (700), a second sensor (703) is provided on the inner top surface of the water level controller (700), and an inlet and outlet (704) is provided at the bottom of the water level controller (700), the inlet and outlet (704) being in communication with the water cavity (705).

4. The water-flooded underwater coal mining and conveying machine according to claim 1, characterized in that: When the front end of the delivery pump (2) is connected to the feed hopper (14), a feed roller (15) is rotatably provided in the feed hopper (14).

5. The water-flooded underwater coal mining and conveying machine according to claim 2, characterized in that: The first driving source (9) comprises a first motor (91) and a reducer (92) mounted on the first branch pipe (36), and a driving gear (93) sleeved on the knife shaft (31); the first motor (91) and the reducer (92) are connected, and the output end of the reducer (92) is connected to the driving gear (93).

6. The water-flooded underwater coal mining and conveying machine according to any one of claims 1 to 4, characterized in that: The delivery pump (2) comprises a suction pipe (21), a pump body (22) and a second motor (23) which are connected in sequence, the suction pipe (21) being connected to the rear end of the blade disc (3), or the suction pipe (21) being connected to the feed hopper (14), the pump body (22) being provided with a second branch pipe (24), and the discharge port (25) being provided at the end of the second branch pipe (24).

7. The water-flooded underwater coal mining and conveying machine according to claim 6, characterized in that: The second motor (23) is an oil-immersed motor, and is provided with a first zone (231) and a second zone (232) therein; a pressure-balancing piston (233) is reciprocatingly provided between the first zone (231) and the second zone (232) to balance the pressures of the first zone (231) and the second zone (232); and a plurality of holes (234) are provided on the side wall of the second zone (232).

8. The water-flooded underwater coal mining and conveying machine according to any one of claims 1 to 4, characterized in that: The vehicle body (1) comprises a vehicle frame (11), running wheels (12) and supporting legs (13) mounted on the front and rear ends of the vehicle frame (11); the delivery pump (2) and the buoyancy tank (5) are placed on the vehicle frame (11); and the running wheels (12) are oil-immersed motor wheels.

9. The water-flooded underwater coal mining and conveying machine according to any one of claims 1 to 4, characterized in that: The second driving source (10) comprises a third motor (101), a drainer (102) electrically connected to the third motor (101), a water outlet pipe (104) connected to the drainer (102), and a water supply pipe (103) connected to the third motor (101); the third motor (101) and the drainer (102) are mounted on the vehicle body (1); and the water outlet pipe (104) and the water supply pipe (103) are both in communication with the accommodating cavity.

10. A water-flooded underwater coal mining and transportation system, comprising a coal storage pool (500) located outside a mine, characterized in that: It also includes a water supply device (300) placed outside the mine and a water-filled underwater coal mining and conveying machine as described in any one of claims 1 to 9 placed under the mine, wherein the discharge port (25) is connected to the coal storage pool (500) through a conveying pipeline (8), and the water supply device (300) is connected to the buoyancy box (5) and the mine respectively.

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