A sand washer for mines

Abstract

This invention discloses a sand washing machine for mining, relating to the technical field of sand washing machines. It includes an impeller and a washing tank. The impeller includes a shaft and two wheel frames fixedly mounted on the shaft. A plurality of blades are evenly installed circumferentially between the two wheel frames. Each blade includes a solid portion and a hollow portion. The blades slide against the wheel frames, and the sliding direction of the blades is parallel to their own. Specifically, when a blade rotates to the discharge position of the corresponding washing tank, it reciprocates relative to the wheel frame once in a direction parallel to itself. During this process, on the one hand, the sand and gravel on the blades slide down and separate from the blades under the combined action of its own gravity and inertia; on the other hand, the first inclined plate corresponding to the blade impacts the corresponding second inclined plate, causing the blade to vibrate and promoting the separation of sand and gravel stuck in the hollow portion from the hollow portion, greatly reducing the occurrence of sand and gravel getting stuck on the blades and continuing to rotate with them.

Description

Technical Field

[0001] This invention relates to the field of sand washing machine technology, specifically a sand washing machine for mining. Background Technology

[0002] Sand and gravel extracted from mines often contain dust particles, which need to be cleaned using a sand washing machine to remove them. The cleaned sand and gravel are then transported via conveying equipment. Specifically, when the sand washing machine is working, the power unit drives the impeller to rotate slowly through a V-belt, reducer, and gear reducer. The sand and gravel enter the washing tank from the feed chute and are washed. The clean sand and gravel are carried away by the blades, while the mud and water leak out through the blade mesh. The sand and gravel are poured from the rotating impeller into the discharge chute, thus completing the sand and gravel washing process.

[0003] There are some existing studies on sand washing machines. For example, Chinese invention patent application CN112138852A discloses a sand washing machine for mining machinery, which includes a sand washing wheel structure, a rotating frame, a housing, a support, a reducer, and a rotary motor. The outer end of the rotating frame is welded to the inner wall of the sand washing wheel structure. When the cleaned sand and gravel guide trough passes through the water inlet, the upper surface of the guide vibration plate structure will tilt from left to right. This causes the sand and gravel to be discharged to the right under the action of the water source when it enters the upper part of the guide vibration plate structure, and to flow towards the top of the conveyor belt. This can effectively prevent a large amount of sand and gravel from remaining in the guide trough and not being discharged. For example, Chinese invention patent application CN117019372A discloses a spiral mining sand washing machine, which includes a frame, a power unit, a propeller shaft, propeller blades, box a, box b, a sleeve, and a stirring pipe; the upper half of the propeller shaft is provided with a connecting assembly; the inner side of the propeller blades is connected to the connecting assembly; box a is located at the bottom of the frame and the outer shell, and two sets of baffles are provided between box a and the outer shell, and a partition is provided on the inner wall of box a; box b is located on the inner wall of box a, and a high-pressure water delivery pipe is provided on box b; the sleeve is fitted on the lower half of the propeller shaft, the sleeve passes through the bottom, passes through box a, and extends into box b, and a waterproof sealing bearing a is provided between the inner wall of the top of the sleeve and the propeller shaft.

[0004] During actual operation, some smaller sand and gravel particles may become stuck in the blade mesh. When the blades rotate to the discharge position, these particles cannot separate from the blades under their own weight and instead continue to rotate with the blades, re-entering the washing tank. This situation increases unnecessary energy consumption of the sand washing machine and reduces its working efficiency; moreover, sand and gravel stuck in the blade mesh also affects the normal discharge of mud and water. Summary of the Invention

[0005] The purpose of this invention is to provide a sand washing machine for mining, so as to overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sand washing machine for mining, comprising an impeller and a washing tank, the impeller comprising a wheel shaft and two wheel frames fixedly mounted on the wheel shaft, a plurality of blades being uniformly installed circumferentially between the two wheel frames, the blades comprising a solid part and a hollow part; the blades slidingly engage with the wheel frames and the sliding direction of the blades is parallel to their own.

[0007] The blade has a normal state and an unloading state. In the normal state, the inner edge of the hollow part of the blade is in contact with the inner surface of the solid part of the adjacent blade. In the unloading state, the inner edge of the hollow part of the blade is separated from the inner surface of the solid part of the adjacent blade. The washing tank has a discharge position and a loading position. When the blade rotates to the corresponding discharge position of the washing tank, it switches from the normal state to the unloading state. After the sand and gravel on the blade separate from the blade, the blade switches from the unloading state to the normal state.

[0008] As a preferred embodiment of the present invention, a sliding groove is provided on the wheel frame corresponding to the position of each blade, and a round rod that movably engages with the sliding groove is rotatably installed on both sides of the blade; an arc-shaped guide rail is fixedly installed in the washing tank, the guide rail is coaxial with the wheel axle, and a guide groove that movably engages with the round rod is provided on the guide rail.

[0009] As a preferred embodiment of the present invention, a first inclined plate is fixedly installed on the inner side of the hollowed-out portion by a first bracket; a second inclined plate is fixedly installed on the axle corresponding to the position of each blade by a second bracket; the first inclined plate and the second inclined plate are parallel to each other.

[0010] As a preferred embodiment of the present invention, a first horizontal shaft parallel to the wheel axle is rotatably installed in the washing tank, and a plurality of rectangular first blades are uniformly fixedly installed on the first horizontal shaft along its circumference, and a plurality of through slots are uniformly opened on the first blades along the axial direction of the first horizontal shaft.

[0011] As a preferred embodiment of the present invention, a second horizontal shaft parallel to and above the first horizontal shaft is rotatably installed inside the washing tank. A plurality of second blades are uniformly fixedly installed on the second horizontal shaft along its circumference. The second blades are arc-shaped plates. A first pulley is fixedly installed at the end of the first horizontal shaft, and a second pulley is fixedly installed at the end of the second horizontal shaft. The first pulley and the second pulley are connected by a conveyor belt.

[0012] As a preferred embodiment of the present invention, an arc-shaped filter plate is fixedly installed in the washing tank at a position corresponding to the second horizontal axis; two clamping rods are fixedly installed in the washing tank, and a net bag located below the filter plate is installed between the two clamping rods; a water pipe located above the net bag is horizontally fixedly installed in the washing tank, and a strip-shaped opening is provided at the bottom of the water pipe.

[0013] As a preferred embodiment of the present invention, the solid part is U-shaped, and a rectangular plate is rotatably mounted on the solid part. A torsion spring is connected between the rectangular plate and the solid part. The rectangular plate has a first state parallel to the blade, a second state in contact with the hollowed-out part of the adjacent blade, and a third state flipped away from the wheel axle.

[0014] As a preferred embodiment of the present invention, a downwardly inclined rod is fixedly installed on the inner wall of the washing tank at the position corresponding to the discharge position of the washing tank, and the position of the inclined rod corresponds to that of the rectangular plate.

[0015] As a preferred embodiment of the present invention, rollers are rotatably mounted at the edge of the rectangular plate corresponding to the position of the diagonal rod.

[0016] As a preferred embodiment of the present invention, a horizontal baffle is installed on the inner wall of the washing tank at the position corresponding to the material loading position of the washing tank.

[0017] In the above technical solution, the present invention provides a sand washing machine for mining, in which the blades can slide relative to the wheel frame. Specifically, when the blade rotates to the discharge position of the corresponding washing tank, the blade moves back and forth relative to the wheel frame in a direction parallel to itself. During this process, on the one hand, the sand and gravel on the blade will slide down and separate from the blade under the combined action of its own gravity and inertia. On the other hand, the first inclined plate corresponding to the blade will hit the corresponding second inclined plate, causing the blade to vibrate and promote the separation of the sand and gravel stuck in the hollow part from the hollow part, greatly reducing the occurrence of sand and gravel getting stuck on the blade and continuing to rotate with the blade.

[0018] Furthermore, in this invention, the sand and gravel entering the washing tank drive the second horizontal shaft and the second blade to rotate, which in turn drives the first horizontal shaft and the first blade to rotate rapidly. During the rapid rotation of the first blade, water is pushed down onto the falling sand and gravel, cleaning them. Simultaneously, the first blade generates air bubbles; that is, the water flow colliding with the falling sand and gravel contains a large number of air bubbles. When these bubbles come into contact with the sand and gravel, they burst, generating vibrations that promote the separation of dust from the sand and gravel surface, improving the cleaning effect. The water flow generated by the rotation of the first blade carries the separated dust onto the filter plate, thus filtering the water in the washing tank and reducing the possibility of suspended dust in the water re-adhering to the sand and gravel. In summary, this invention uses the power of falling sand and gravel to generate water flow, achieving automatic cleaning of sand and gravel and automatically collecting suspended dust in the water. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the first three-dimensional structure of a sand washing machine for mining in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a side view of a sand washing machine for mining, as described in an embodiment of the present invention.

[0023] Figure 4 This is a side view of the internal structure of a sand washing machine for mining, as described in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the second three-dimensional structure of the sand washing machine for mining in an embodiment of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 This is a schematic diagram of the motion state of the rectangular plate in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Impeller; 101. Axle; 102. Frame; 1021. Slide groove; 103. Blade; 1031. Solid part; 1032. Hollowed-out part; 104. Round rod; 2. Washing tank; 3. Guide rail; 301. Guide groove; 4. First support; 5. First inclined plate; 6. Second support; 7. Second inclined plate; 8. First horizontal shaft; 9. First blade; 901. Through groove; 10. Second horizontal shaft; 11. Second blade; 12. First pulley; 13. Second pulley; 14. Conveyor belt; 15. Filter plate; 16. Clamping rod; 17. Net bag; 18. Water pipe; 1801. Opening; 19. Rectangular plate; 20. Inclined rod; 21. Stop bar. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 3As shown, this embodiment provides a sand washing machine for mining, used to wash sand and gravel and remove dust particles. Specifically, it includes an impeller 1 and a washing tank 2. The impeller 1 includes a horizontal shaft 101 and two wheel frames 102 fixedly mounted on and coaxial with the shaft 101. A drive motor and a reduction mechanism are installed outside the washing tank 2. During operation, the drive motor provides power and transmits it to the shaft 101 through the reduction mechanism, thereby driving the shaft 101 and wheel frames 102 evenly. The wheel rim 102 rotates rapidly; several blades 103 are evenly installed around the circumference of the two wheel rims 102, and the two side edges of the blades 103 are in contact with the wheel rims 102; when the wheel axle 101 and the wheel rims 102 rotate, they drive each blade 103 to rotate synchronously; the blades 103 include a solid part 1031 and a hollow part 1032 that are flush with each other; the blades 103 slide in contact with the wheel rims 102 and the sliding direction of the blades 103 is parallel to itself; the included angle between adjacent blades 103 is 40°.

[0031] like Figure 1 As shown, washing tank 2 has a discharge position and a loading position. Figure 1 The left side of the washing tank 2 is the feeding position, and the right side of the washing tank 2 is the discharging position. The blade 103 has a normal state and a discharging state. In the normal state, the inner edge of the hollow part 1032 in the blade 103 (i.e., the edge parallel to the wheel axle 101 and closest to the wheel axle 101) is in contact with the inner side of the solid part 1031 in the adjacent blade 103 (i.e., the surface facing the wheel axle 101). In the discharging state, the inner edge of the hollow part 1032 in the blade 103 is separated from the inner side of the solid part 1031 in the adjacent blade 103. That is, when the blade 103 slides outward (i.e., towards the outer edge of the wheel frame 102), it changes from the normal state to the discharging state. When the blade 103 rotates to the corresponding discharging position of the washing tank 2, it switches from the normal state to the discharging state. After the sand and gravel on the blade 103 separate from the blade 103, the blade 103 switches from the discharging state to the normal state.

[0032] The washing tank 2 is filled with water. An external feeder continuously feeds the sand and gravel to be washed into the washing tank 2 from the loading position. The sand and gravel entering the washing tank 2 are deposited at the bottom of the washing tank 2 under the action of gravity. In specific operation, the impeller 1 rotates under the action of external force, and each blade 103 on the impeller 1 enters the washing tank 2 in sequence and goes below the water surface. The blades 103 contact the sand and gravel deposited at the bottom of the water and push the sand and gravel to move. Some of the sand and gravel enters between two adjacent blades 103. As the blades 103 leave the water surface, the sand and gravel between the two blades 103 are also brought to the surface. Specifically, the sand and gravel accumulate between the solid part 1031 of one blade 103 and the hollow part 1032 of the adjacent blade 103. The muddy water falls back into the washing tank 2 from the hollow part 1032. During the above process, the blades 103 are in normal operation. State; When the blade 103 rotates with the axle 101 and the wheel frame 102 to the discharge position of the washing tank 2, the blade 103 changes from the normal state to the unloading state under the action of external force, and then changes back to the normal state; during this process, the blade 103 moves back and forth once, and the sand and gravel on the blade 103 will slide down under the combined action of gravity and inertia (because the blade 103 has a change of direction process, and the process is relatively fast, so the inertia of the sand and gravel will cause the sand and gravel to slide down along the blade 103), which promotes the separation of sand and gravel from the blade 103. Compared with the traditional sand washing machine that relies solely on the gravity of the sand and gravel to fall, this embodiment greatly reduces the situation of sand and gravel getting stuck on the hollow part 1032; it should be noted that when a certain blade 103 changes state, the blade 103 above it still remains in the normal state.

[0033] like Figure 1 and Figure 3As shown, each blade 103 on the wheel frame 102 has a groove 1021. Round rods 104, which are rotatably mounted on both sides of the blade 103 and move in conjunction with the grooves 1021, are parallel to the wheel axle 101. An arc-shaped guide rail 3 is fixedly installed inside the washing tank 2. The guide rail 3 is coaxial with the wheel axle 101, and a guide groove 301, which moves in conjunction with the round rods 104, is provided on the guide rail 3. The guide groove 301 is mostly coaxial with the guide rail 3, forming an outward protrusion only at the discharge position of the corresponding washing tank 2. During operation, the wheel axle 101, wheel frame 102, blades 103, and round rods 104 synchronously rotate around the wheel axle 101. The axis of 01 rotates; after the blade 103 rotates to the position corresponding to the guide rail 3, the round rod 104 enters the guide groove 301 and cooperates with the guide groove 301; when the blade 103 rotates to the discharge position of the corresponding washing tank 2, the round rod 104 also enters the protruding position on the guide groove 301, and under the guidance of the guide groove 301, it moves back and forth relative to the wheel frame 102 once, thereby driving the blade 103 to also move back and forth relative to the wheel frame 102 once; in this way, when each blade 103 rotates to the discharge position of the corresponding washing tank 2, it will automatically move back and forth relative to the wheel frame 102 once to promote the separation of sand and gravel from the blade 103.

[0034] like Figure 3 As shown, a first inclined plate 5 is fixedly installed on the inner side of the hollowed-out portion 1032 by a first bracket 4; a second inclined plate 7 is fixedly installed on the axle 101 corresponding to the position of each blade 103 by a second bracket 6; the first inclined plate 5 and the second inclined plate 7 are parallel to each other; during the reciprocating movement of the blade 103 relative to the wheel frame 102, it will drive the corresponding first bracket 4 and the first inclined plate 5 to move synchronously, and the first inclined plate 5 will collide with the corresponding second inclined plate 7. The collision causes the blade 103 to vibrate, thereby further promoting the separation of sand and gravel on the blade 103 from the blade 103.

[0035] In summary, through the above-described scheme, when the blade 103 rotates to the discharge position of the corresponding washing tank 2, the blade 103 reciprocates once relative to the wheel frame 102 in a direction parallel to itself. During this process, on the one hand, the sand and gravel on the blade 103 will slide down and separate from the blade 103 under the combined action of its own gravity and inertia. On the other hand, the first inclined plate 5 corresponding to the blade 103 will collide with the corresponding second inclined plate 7, causing the blade 103 to vibrate, which promotes the separation of the sand and gravel stuck in the hollow part 1032 from the hollow part 1032, greatly reducing the occurrence of sand and gravel getting stuck on the blade 103 and continuing to rotate with the blade 103.

[0036] like Figure 6As shown, in this embodiment, a first horizontal shaft 8 parallel to the wheel axle 101 is rotatably installed inside the washing tank 2. The first horizontal shaft 8 is located at the corresponding feeding position of the washing tank 2. Several rectangular first blades 9 are uniformly fixedly installed on the first horizontal shaft 8 along its circumference. Several through slots 901 are uniformly opened on the first blades 9 along the axial direction of the first horizontal shaft 8. An external conveyor sends sand and gravel into the washing tank 2. After the sand and gravel fall into the water, they are deposited downwards under the action of gravity. During this process, the first horizontal shaft 8 and the first blades 9 rotate rapidly. The movement causes the water near the first horizontal axis 8 to form a circular water flow. The water flow collides with the sinking sand and gravel, washing the sand and gravel and promoting the separation of dust particles from the sand and gravel. In addition, since the first blade 9 has a through groove 901, when the first blade 9 rotates rapidly, a large number of small bubbles will be generated at the through groove 901. These small bubbles will follow the water flow to collide with the sinking sand and gravel. After the bubbles collide with the sand and gravel, they will break, causing the sand and gravel surface to vibrate, which further promotes the separation of dust particles from the sand and gravel.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, a second horizontal shaft 10, parallel to and above the first horizontal shaft 8, is rotatably installed inside the washing tank 2. Several second blades 11, which are arc-shaped, are uniformly fixedly installed along the circumference of the second horizontal shaft 10. A first pulley 12 is fixedly installed at the end of the first horizontal shaft 8, and a second pulley 13 is fixedly installed at the end of the second horizontal shaft 10. The first pulley 12 and the second pulley 13 are connected by a conveyor belt 14. In this embodiment, the diameter of the second pulley 13 is five times the diameter of the first pulley 12. Specifically, an external conveyor feeds sand and gravel into the washing tank 2 (the direction of the sand and gravel falling is referenced). Figure 3 (White arrow on the right) During the falling process, the sand and gravel come into contact with the second blade 11 and push the second blade 11 and the second horizontal shaft 10 to rotate. The second horizontal shaft 10 drives the second pulley 13 to rotate, and the second pulley 13 drives the first pulley 12, the first horizontal shaft 8 and the first blade 9 to rotate through the conveyor belt 14. Thus, in this embodiment, on the one hand, the falling sand and gravel provide power so that the first horizontal shaft 8 and the first blade 9 can rotate automatically. On the other hand, during the brief process of the sand and gravel falling onto the second blade 11 and pushing the second blade 11 to rotate, the second blade 11 will exert a reaction force on the sand and gravel, so that the sand and gravel tend to be evenly distributed. Thus, the thickness of the sand and gravel deposited at the bottom of the washing tank 2 after settling is relatively uniform. When the impeller 1 transports the sand and gravel, the sand and gravel are evenly distributed along the axial direction of the impeller 1. Long-term operation can reduce the damage to the impeller 1 caused by uneven axial load on the impeller 1.

[0038] like Figure 4 and Figure 6As shown, an arc-shaped filter plate 15 is fixedly installed in the washing tank 2 at a position corresponding to the second horizontal axis 10; two clamping rods 16 are fixedly installed in the washing tank 2, and a net bag 17 located below the filter plate 15 is installed between the two clamping rods 16; a water pipe 18 is horizontally fixedly installed in the washing tank 2 above the net bag 17, one end of the water pipe 18 is connected to an external hose, and a strip-shaped opening 1801 is opened at the bottom of the water pipe 18; specifically, when the first horizontal axis 8 and the first blade 9 rotate rapidly, the water near the first horizontal axis 8 is driven to flow in a ring (water flow direction reference). Figure 4 (In the direction of the black arrow around the first horizontal axis 8), after the water flow collides with the sinking sand and gravel (refer to the direction of sand and gravel movement) Figure 4 (In the direction of the white arrow in the middle), dust particles on the sand and gravel separate from the sand and gravel and move synchronously with the water flow; the filter plate 15 is in the path of the water flow, and the water flow collides with the filter plate 15 when it passes through the filter plate 15. The filter plate 15 filters the dust particles carried in the water flow. As more and more dust particles are on the filter plate 15, the dust particles will form agglomerates and be deposited on the net bag 17 under the action of gravity. The water pipe 18 extracts the dust agglomerates deposited on the net bag 17 through the opening 1801 (the hose connected to the water pipe 18 is connected to the water pump to provide power); in this way, through the cooperation of the filter plate 15 and the first blade 9, the mud and water in the washing tank 2 are continuously filtered, reducing the dust particles suspended in the mud and water and reducing the possibility of the dust particles suspended in the water re-adhere to the sand and gravel.

[0039] In actual operation, after the blade 103 enters below the water surface in the washing tank 2, before it comes into contact with the sand and gravel deposited at the bottom of the washing tank 2, the force between the blade 103 and the muddy water will create a large resistance on the blade 103, thereby increasing the power required to drive the impeller 1. In addition, the amount of sand and gravel picked up by each blade 103 when it comes into contact with the sand and gravel will also be different. If there is too much sand and gravel, it will affect the full separation of the sand and gravel from the blade 103. Based on this, the following design was also made in this embodiment.

[0040] like Figure 1 and Figure 5As shown, in this embodiment, the solid part 1031 is U-shaped, and a rectangular plate 19 is rotatably mounted on the solid part 1031. A torsion spring connects the rectangular plate 19 and the solid part 1031. The rectangular plate 19 has a first state parallel to the blade 103. When the rectangular plate 19 is not subjected to external force, the rectangular plate 19 always maintains the first state. The rectangular plate 19 also has a second state in which the rectangular plate 19 is in contact with the hollow part 1032 in the adjacent blade 103. The rectangular plate 19 also has a third state in which the rectangular plate 19 flips away from the wheel axle 101. An inclined bar 20 is fixedly installed on the inner wall of the washing tank 2 at the discharge position of the washing tank 2. The inclined bar 20 corresponds to the position of the rectangular plate 19. A roller is rotatably mounted on the edge of the rectangular plate 19 at the position corresponding to the inclined bar 20 to reduce the friction between the roller and the inclined bar 20. A horizontal baffle 21 is installed on the inner wall of the washing tank 2 at the loading position of the washing tank 2.

[0041] Specifically, before the blade 103 enters the muddy water in the washing tank 2, the rectangular plate 19 maintains its first state. After the blade 103 enters the water, the edge of the rectangular plate 19 contacts the inclined rod 20, and under the reaction force of the inclined rod 20, it overcomes the force of the torsion spring and flips towards the side closer to the wheel axle 101, i.e., the rectangular plate 19 enters its second state. In the second state, the rectangular plate 19 guides the water flow, reducing the resistance of the water flow to the blade 103 and the rectangular plate 19 as a whole. Before the blade 103 contacts the sand and gravel, the rectangular plate 19 separates from the inclined rod 20 and returns to its first state under the force of the torsion spring. During the process of the blade 103 contacting the sand and gravel, the rectangular plate 19 always maintains its first state. The following process is for reference. Figure 7 After the blade 103 leaves the water surface, the rectangular plate 19 contacts the baffle 21. The baffle 21 blocks the rectangular plate 19 and flips it away from the wheel axle 101. The rectangular plate 19 enters the third state, and the excess sand on the blade 103 slides back into the washing tank 2 under the action of gravity. As the blade 103 continues to rotate, the rectangular plate 19 separates from the baffle 21 and returns to the first state under the action of the torsion spring. Through this flipping action of the rectangular plate 19, the amount of sand transported by each blade 103 is more consistent, avoiding the situation where the sand cannot be fully separated from the blade 103 due to excessive sand.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sand washing machine for mining, comprising an impeller (1) and a washing tank (2), wherein the impeller (1) comprises a shaft (101) and two wheel frames (102) fixedly mounted on the shaft (101), and a plurality of blades (103) are evenly installed circumferentially between the two wheel frames (102), characterized in that, The blade (103) includes a solid part (1031) and a hollow part (1032); the blade (103) is slidably engaged with the wheel frame (102) and the sliding direction of the blade (103) is parallel to itself; The blade (103) has a normal state and an unloading state. In the normal state, the inner edge of the hollow part (1032) in the blade (103) is in contact with the inner surface of the solid part (1031) in the adjacent blade (103). In the unloading state, the inner edge of the hollow part (1032) in the blade (103) is separated from the inner surface of the solid part (1031) in the adjacent blade (103). The washing tank (2) has a discharge position and a loading position. When the blade (103) rotates to the discharge position of the corresponding washing tank (2), it switches from the normal state to the unloading state. After the sand and gravel on the blade (103) are separated from the blade (103), the blade (103) switches from the unloading state to the normal state.

2. The sand washing machine for mining according to claim 1, characterized in that, The wheel frame (102) is provided with a groove (1021) corresponding to the position of each blade (103). A round rod (104) that is rotatably installed on both sides of the blade (103) and is in movable cooperation with the groove (1021) is provided. An arc-shaped guide rail (3) is fixedly installed in the washing tank (2). The guide rail (3) is coaxial with the wheel axle (101) and a guide groove (301) that is in movable cooperation with the round rod (104) is provided on the guide rail (3).

3. A sand washing machine for mining according to claim 2, characterized in that, A first inclined plate (5) is fixedly installed on the inner side of the hollow part (1032) by a first bracket (4); a second inclined plate (7) is fixedly installed on the axle (101) corresponding to the position of each blade (103) by a second bracket (6); the first inclined plate (5) and the second inclined plate (7) are parallel to each other.

4. A sand washing machine for mining according to claim 3, characterized in that, The washing tank (2) is rotatably installed with a first horizontal shaft (8) parallel to the wheel axle (101). Several rectangular first blades (9) are uniformly fixed on the first horizontal shaft (8) along its circumference. Several through slots (901) are uniformly opened on the first blades (9) along the first horizontal shaft (8) axially.

5. A sand washing machine for mining according to claim 4, characterized in that, A second horizontal shaft (10) is rotatably installed inside the washing tank (2), parallel to the first horizontal shaft (8) and located above the first horizontal shaft (8). Several second blades (11) are uniformly fixedly installed on the second horizontal shaft (10) along its circumference. The second blades (11) are arc-shaped plates. A first pulley (12) is fixedly installed at the end of the first horizontal shaft (8), and a second pulley (13) is fixedly installed at the end of the second horizontal shaft (10). The first pulley (12) and the second pulley (13) are connected by a conveyor belt (14).

6. A sand washing machine for mining according to claim 5, characterized in that, An arc-shaped filter plate (15) is fixedly installed in the washing tank (2) at the position corresponding to the second horizontal axis (10); two clamping rods (16) are fixedly installed in the washing tank (2), and a net bag (17) located below the filter plate (15) is installed between the two clamping rods (16); a water pipe (18) located above the net bag (17) is fixedly installed horizontally in the washing tank (2), and a strip-shaped opening (1801) is opened at the bottom of the water pipe (18).

7. A sand washing machine for mining according to claim 6, characterized in that, The solid part (1031) is U-shaped, and a rectangular plate (19) is rotatably mounted on the solid part (1031). A torsion spring is connected between the rectangular plate (19) and the solid part (1031). The rectangular plate (19) has a first state parallel to the blade (103) it is in, a second state in contact with the hollow part (1032) in the adjacent blade (103), and a third state in which it is flipped away from the wheel axle (101).

8. A sand washing machine for mining according to claim 7, characterized in that, An inclined rod (20) is fixedly installed on the inner wall of the washing tank (2) at the discharge position of the washing tank (2), and the inclined rod (20) corresponds to the position of the rectangular plate (19).

9. A sand washing machine for mining according to claim 8, characterized in that, Rollers are rotatably mounted at the edge of the rectangular plate (19) corresponding to the position of the diagonal rod (20).

10. A sand washing machine for mining according to claim 9, characterized in that, A horizontal baffle (21) is installed on the inner wall of the washing tank (2) at the feeding position of the washing tank (2).

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