Sand washer for mine

Abstract

The invention discloses a sand washer for mines, and relates to the technical field of sand washers, the sand washer comprises an impeller and a washing tank, the impeller comprises a wheel shaft and two wheel frames fixedly mounted on the wheel shaft, a plurality of blades are uniformly mounted between the two wheel frames in the circumferential direction, and each blade comprises a solid part and a hollow part; the blades are in sliding fit with the wheel frame, and the sliding directions of the blades are parallel. The blades can slide relative to the wheel frame, specifically, when the blades rotate to the discharging position of the corresponding washing tank, the blades conduct one-time reciprocating motion relative to the wheel frame in the direction parallel to the blades; in the process, on one hand, gravels on the blades can slide downwards to be separated from the blades under the combined action of self gravity and inertia force, and on the other hand, the first inclined plates corresponding to the blades can impact the corresponding second inclined plates, so that the blades generate vibration, and the gravels clamped in the hollow parts are promoted to be separated from the hollow parts; and the condition that the gravel is clamped on the blade and continuously rotates along with the blade is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sand washers, in particular to a sand washing machine for mines. Background Art

[0002] The sand and gravel mined from the mines are mixed with dust particles, which need to be cleaned by a sand washer to remove the dust particles, and then the cleaned sand and gravel are transported by conveying equipment. Specifically, when the sand washer is working, the power device drives the impeller to rotate slowly through the V-belt, reducer, and gear reducer, and the sand and gravel enter the washing trough from the feed trough for cleaning. The clean sand and gravel are taken away by the blades, and the mud and water leak out through the blade mesh. The sand and gravel are poured from the rotating impeller into the discharge trough, thus completing the cleaning of the sand and gravel.

[0003] There have been some studies on sand washing machines in the prior art. For example, the Chinese invention patent application with publication number CN112138852A discloses a sand washing machine for mining machinery, which includes a grinding wheel structure, a rotating rod frame, a box body, a support, a reducer, and a rotating motor. The outer end of the rotating rod frame is welded to the inner wall of the grinding wheel structure. When the cleaned sand and gravel guide trough passes through the water inlet joint, the upper end surface of the guide vibration plate structure will tilt from left to right, so that when the water source enters the top of the guide vibration plate structure, the sand and gravel are discharged to the right under the action of the water source and flow to the top of the conveyor belt, thereby effectively avoiding a large amount of sand and gravel remaining in the guide trough and failing to be discharged. For another example, a spiral mining sand washing machine disclosed in the Chinese invention patent application with publication number CN117019372A includes a frame, a power device, a propeller shaft, propeller blades, a box body a, a box body b, a sleeve and a stirring tube; a connecting assembly is arranged on the upper half of the propeller shaft; the inner side of the propeller blade is connected to the connecting assembly; the box body a is arranged at the bottom of the frame and the outer shell, two sets of water baffles are arranged between the box body a and the outer shell, and a partition is arranged on the inner wall of the box body a; the box body b is arranged on the inner wall of the box body a, and a high-pressure water delivery pipe is arranged on the box body b; the sleeve is sleeved on the lower half of the propeller shaft, the sleeve passes through the bottom, passes through the box body a and extends into the box body b, and a waterproof sealed bearing a is arranged between the top inner wall of the sleeve and the propeller shaft.

[0004] In the actual working process, some sand and gravel with smaller particle size will be stuck on the blade mesh. When the blade rotates to the unloading position, this part of sand and gravel cannot be separated from the blade under the action of its own gravity, but will continue to rotate with the blade and enter the washing tank again. This situation will increase unnecessary energy consumption of the sand washing machine and reduce the working efficiency of the sand washing machine; and the sand and gravel stuck on the blade mesh will also affect the normal discharge of mud and water. Summary of the invention

[0005] The object of the present invention is to provide a sand washing machine for mining to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sand washing machine for mining, comprising an impeller and a washing trough, the impeller comprising an axle and two wheel frames fixedly mounted on the axle, a plurality of blades being evenly mounted along the circumferential direction between the two wheel frames, the blades comprising a solid part and a hollow part; the blades are slidably matched with the wheel frames and the sliding direction of the blades is parallel to the wheel frames.

[0007] The blades have a normal state and a unloading state; in the normal state, the inner edge of the hollow part of the blade fits with the inner side 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 side of the solid part of the adjacent blade; the washing trough has a discharging position and a loading position, and the blades switch from the normal state to the unloading state when they rotate to the corresponding discharging position of the washing trough. After the sand and gravel on the blades are separated from the blades, the blades switch from the unloading state to the normal state.

[0008] As a preferred technical solution of the present invention, a slide groove is provided on the wheel frame corresponding to the position of each blade, and round rods that movably cooperate with the slide groove are 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 cooperates with the round rod is provided on the guide rail.

[0009] As a preferred technical solution of the present invention, a first inclined plate is fixedly installed on the inner side of the hollow part through a first bracket; a second inclined plate is fixedly installed at the position corresponding to each blade on the axle through a second bracket; the first inclined plate and the second inclined plate are parallel to each other.

[0010] As a preferred technical solution of the present invention, a first horizontal axis parallel to the wheel axle is rotatably installed in the washing tank, and a plurality of rectangular first blades are evenly fixedly installed on the first horizontal axis along its circumference, and a plurality of through grooves are evenly opened on the first blade along the axial direction of the first horizontal axis.

[0011] As a preferred technical solution of the present invention, a second horizontal axis parallel to the first horizontal axis and located above the first horizontal axis is rotatably installed in the washing tank, and a plurality of second blades are evenly fixedly installed on the second horizontal axis along its circumference, and the second blades are arc-shaped plates; a first pulley is fixedly installed at the end of the first horizontal axis, and a second pulley is fixedly installed at the end of the second horizontal axis, and the first pulley and the second pulley are connected by a conveyor belt.

[0012] As a preferred technical solution 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 is installed between the two clamping rods below the filter plate; a water pipe is horizontally fixedly installed above the net bag in the washing tank, and a strip-shaped opening is opened at the bottom of the water pipe.

[0013] As a preferred technical solution of the present invention, the solid part is in a C shape, 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 where it is located, a second state in which it fits with the hollow part of the adjacent blade, and a third state in which it flips towards the side away from the wheel shaft.

[0014] As a preferred technical solution of the present invention, an inclined rod inclined downward is fixedly mounted on the inner wall of the washing tank corresponding to the discharging position of the washing tank, and the inclined rod corresponds to the position of the rectangular plate.

[0015] As a preferred technical solution of the present invention, rollers are rotatably mounted at the positions corresponding to the inclined rod at the edge of the rectangular plate.

[0016] As a preferred technical solution of the present invention, a horizontal stop rod is mounted on the inner wall of the washing tank corresponding to the feeding position of the washing tank.

[0017] In the above technical solution, for a sand washer for mines provided by the present invention, its blades can slide relative to the wheel frame. Specifically, when the blade rotates to the discharging position corresponding to the washing tank, the blade makes a reciprocating movement relative to the wheel frame along 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 force, and on the other hand, the first inclined plate corresponding to the blade will impact the corresponding second inclined plate, causing the blade to vibrate, promoting the separation of the sand and gravel stuck in the hollow part from the hollow part, and greatly reducing the situation where the sand and gravel are stuck on the blade and continue to rotate with the blade.

[0018] In addition, when the sand and gravel in the present invention enter the washing tank, they will drive the second horizontal shaft and the second blade to rotate, thereby driving the first horizontal shaft and the first blade to rotate rapidly. During the rapid rotation of the first blade, the water flow is pushed towards the falling sand and gravel to wash the sand and gravel. At the same time, the first blade will generate bubbles, that is, the water flow hitting the falling sand and gravel contains a large amount of bubbles. When the bubbles contact the sand and gravel, they burst and generate vibrations, promoting the separation of the dust on the surface of the sand and gravel from the sand and gravel, and improving the washing effect of the sand and gravel. The water flow generated when the first blade rotates will drive the dust separated from the sand and gravel to impact the filter plate, thereby filtering the water in the washing tank through the filter plate, reducing the possibility of the dust suspended in the water re-adhering to the sand and gravel; in summary, the present invention generates water flow by the falling sand and gravel to provide power, realizes the automatic washing of the sand and gravel, and can automatically collect the dust suspended in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3 A side view of a sand washing machine for mining in an embodiment of the present invention;

[0023] Figure 4 It is a side view of the internal structure of a sand washing machine for mining in an embodiment of the present invention;

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

[0025] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0026] Figure 7 Schematic diagram of the motion state of the rectangular plate in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Impeller; 101. Axle; 102. Wheel frame; 1021. Slide; 103. Blade; 1031. Solid part; 1032. Hollow part; 104. Round rod; 2. Washing trough; 3. Guide rail; 301. Guide groove; 4. First bracket; 5. First inclined plate; 6. Second bracket; 7. Second inclined plate; 8. First horizontal axis; 9. First blade; 901. Through groove; 10. Second horizontal axis; 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. Oblique rod; 21. Baffle rod. DETAILED DESCRIPTION

[0029] In order 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, which is used for cleaning sand and gravel and removing dust particles in the sand and gravel. It specifically includes an impeller 1 and a washing tank 2. The impeller 1 includes a horizontal wheel shaft 101 and two wheel frames 102 fixedly installed on the wheel shaft 101 and coaxial with the wheel shaft 101; a driving motor and a reduction mechanism are installed outside the washing tank 2. When working, the driving motor provides power and transmits the power to the wheel shaft 101 through the reduction mechanism, thereby driving the wheel shaft 101 and the wheel frame 102 to evenly The wheel frame 102 rotates at high speed; a plurality of blades 103 are evenly installed between the two wheel frames 102 along the circumference of the wheel frame 102, and the edges of the blades 103 on both sides are in contact with the wheel frame 102; when the wheel axle 101 and the wheel frame 102 rotate, the blades 103 are driven 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 are slidably matched with the wheel frame 102, and the sliding direction of the blades 103 is parallel to itself; the angle between adjacent blades 103 is 40°.

[0031] like Figure 1 As shown, the washing tank 2 has a discharging position and a loading position. Figure 1 The left side of the middle washing tank 2 is the loading 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 (that is, the side edge parallel to the wheel axle 101 and closest to the wheel axle 101) is in contact with the inner side surface of the solid part 1031 in the adjacent blade 103 (that is, the side 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 surface of the solid part 1031 in the adjacent blade 103; that is, when the blade 103 slides outward (that is, toward 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 are separated 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, and an external feeder continuously feeds the sand and gravel to be washed into the washing tank 2 from the loading position of the washing tank 2. The sand and gravel entering the washing tank 2 are deposited at the bottom of the washing tank 2 under the action of gravity; during specific operation, the impeller 1 rotates under the action of external force, and the blades 103 on the impeller 1 enter the washing tank 2 in turn and enter below the water surface. The blades 103 contact the sand and gravel deposited on the bottom of the water and push the sand and gravel to move, and some of the sand and gravel enter 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 out of the water surface. Specifically, the sand and gravel are accumulated between the solid part 1031 of one of the blades 103 and the hollow part 1032 of the adjacent blade 103, and the muddy water falls back into the washing tank 2 from the hollow part 1032. In the above process, the blades 103 are in normal State; when the blade 103 follows the wheel shaft 101 and the wheel frame 102 to rotate to the discharge position of the washing tank 2, the blade 103 first changes from a normal state to a discharging state under the action of an external force, and then changes back to a normal state from the discharging state; during this process, the blade 103 performs a reciprocating movement, 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 direction change process, and the process is relatively fast, the inertia force of the sand and gravel will cause the sand and gravel to slide down along the blade 103), which promotes the separation of the sand and gravel from the blade 103. Compared with the traditional sand washing machine that simply relies on the gravity of the sand and gravel to fall, this embodiment greatly reduces the situation where the sand and gravel are stuck on the hollow part 1032; it should be noted that when a blade 103 switches its state, the blade 103 above it remains in a normal state.

[0033] like Figure 1 and Figure 3As shown, a slide groove 1021 is provided on the wheel frame 102 at a position corresponding to each blade 103, and round rods 104 that are movably matched with the slide groove 1021 are rotatably installed on both sides of the blade 103, and the round rods 104 are parallel to the wheel axle 101; an arc-shaped guide rail 3 is fixedly installed in the washing tank 2, and the guide rail 3 is coaxial with the wheel axle 101 and a guide groove 301 that is movably matched with the round rod 104 is provided on the guide rail 3, and most of the guide groove 301 is coaxial with the guide rail 3, and only an outward protrusion is formed at the discharge position corresponding to the washing tank 2; when working, the wheel axle 101, the wheel frame 102, the blade 103 and the round rod 104 synchronously revolve around the wheel axle 1 01 rotates along its axis; after the blade 103 rotates to a 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 a discharge position corresponding to the washing tank 2, the round rod 104 also enters the raised position on the guide groove 301, and under the guidance of the guide groove 301, performs a reciprocating movement relative to the wheel frame 102, thereby driving the blade 103 to perform a reciprocating movement relative to the wheel frame 102; in this way, when each blade 103 rotates to a discharge position corresponding to the washing tank 2, it will automatically perform a reciprocating movement relative to the wheel frame 102 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 surface of the hollow part 1032 through a first bracket 4; a second inclined plate 7 is fixedly installed at a position corresponding to each blade 103 on the wheel axle 101 through a second bracket 6; the first inclined plate 5 and the second inclined plate 7 are parallel to each other; when the blade 103 reciprocates 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, which causes the blade 103 to vibrate, thereby further promoting the separation of sand and gravel on the blade 103 from the blade 103.

[0035] To sum up, in this embodiment, through the above scheme, when the blade 103 rotates to the discharge position corresponding to the washing tank 2, the blade 103 performs a reciprocating movement relative to the wheel frame 102 in a direction parallel to itself; in 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, and on the other hand, the first inclined plate 5 corresponding to the blade 103 will hit the corresponding second inclined plate 7, causing the blade 103 to vibrate, thereby promoting the separation of the sand and gravel stuck in the hollow part 1032 from the hollow part 1032, thereby greatly reducing the situation where the sand and gravel are stuck on the blade 103 and continue to rotate with the blade 103.

[0036] like Figure 6As shown, a first horizontal shaft 8 parallel to the wheel axle 101 is rotatably installed in the washing tank 2 in this embodiment, and the first horizontal shaft 8 is located at the corresponding loading position of the washing tank 2. A plurality of rectangular first blades 9 are evenly fixedly installed on the first horizontal shaft 8 along its circumference, and a plurality of through grooves 901 are evenly opened on the first blade 9 along the axial direction of the first horizontal shaft 8; the external conveyor delivers sand and gravel into the washing tank 2, and the sand and gravel fall into the water and settle downward under the action of gravity. In this process, the first horizontal shaft 8 and the first blade 9 rotate rapidly. The water near the first horizontal axis 8 moves, driving the water to form a circular water flow, which collides with the sinking sand and gravel to clean the sand and gravel, and promotes the separation of dust particles on the surface of the sand and gravel from the sand and gravel; in addition, since the first blade 9 is provided with a through groove 901, when the first blade 9 rotates rapidly, a large number of small bubbles will be generated in the through groove 901, and 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 burst, causing the surface of the sand and gravel to vibrate, further promoting the separation of dust particles on the surface of the sand and gravel from the sand and gravel.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, a second horizontal shaft 10 parallel to the first horizontal shaft 8 and located above the first horizontal shaft 8 is rotatably installed in the washing tank 2, and a plurality of second blades 11 are evenly fixedly installed along the circumference of the second horizontal shaft 10, and 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. In this embodiment, the diameter of the second pulley 13 is five times the diameter of the first pulley 12. Specifically, the external conveyor delivers sand and gravel into the washing tank 2 (the direction of sand and gravel falling is referenced). Figure 3 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; in this way, 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 short process in which the sand and gravel fall onto the second blade 11 and drive 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. In this way, the thickness of the sand and gravel deposited at the bottom of the washing tank 2 after sinking is relatively uniform; when the impeller 1 transports the sand and gravel, the sand and gravel are distributed relatively evenly along the axial direction of the impeller 1, and 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 is installed between the two clamping rods 16 and located below the filter plate 15; a water pipe 18 is horizontally fixedly installed in the washing tank 2 and located 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 circular shape (the direction of the water flow is referenced to FIG. 1 ). Figure 4 The black arrow direction around the first horizontal axis 8), after the water flow collides with the sinking sand and gravel (the direction of sand and gravel movement is referenced to Figure 4 The dust particles on the sand and gravel are separated 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 flows through the filter plate 15 and collides with the filter plate 15, and the filter plate 15 filters the dust particles carried by the water flow. As the number of dust particles on the filter plate 15 increases, the dust particles will agglomerate and deposit on the net bag 17 under the action of gravity, and 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, the filter plate 15 cooperates with the first blade 9 to continuously filter the muddy water in the washing tank 2, thereby reducing the dust particles suspended in the muddy water and reducing the possibility of the dust particles suspended in the water adhering to the sand and gravel again.

[0039] In the actual working process, after the blades 103 enter the water surface of the washing tank 2 and before contacting the sand and gravel deposited at the bottom of the washing tank 2, the force between the blades 103 and the muddy water will form a large resistance to the blades 103, thereby increasing the power required to drive the impeller 1; in addition, the amount of sand and gravel taken by each blade 103 when contacting the sand and gravel will also be different. If the amount of sand and gravel is too much, it will affect the full separation of the sand and gravel from the blades 103. Based on this, the following design is also made in this embodiment.

[0040] like Figure 1 and Figure 5As shown, the solid part 1031 in this embodiment is in a C shape. A rectangular plate 19 is rotatably installed on the solid part 1031, and 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 where it is located. When the rectangular plate 19 is not subjected to external forces, the rectangular plate 19 always maintains the first state. The rectangular plate 19 also has a second state, in which the rectangular plate 19 fits against 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 towards the side away from the wheel shaft 101. An inclined rod 20 inclined downward is fixedly installed on the inner wall of the washing tank 2 corresponding to the discharge position of the washing tank 2, and the inclined rod 20 corresponds to the position of the rectangular plate 19. Rollers are rotatably installed at the edge of the rectangular plate 19 corresponding to the position of the inclined rod 20 to reduce the friction with the inclined rod 20. A horizontal stop rod 21 is installed on the inner wall of the washing tank 2 corresponding to the feeding 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 the 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, overcomes the acting force of the torsion spring and flips towards the side closer to the wheel shaft 101, that is, the rectangular plate 19 enters the second state. The rectangular plate 19 in the second state guides the water flow and reduces the resistance of the water flow to the overall blade 103 and rectangular plate 19. Before the blade 103 contacts the sand and gravel, the rectangular plate 19 separates from the inclined rod 20 and returns to the first state under the acting force of the torsion spring. During the process of the blade 103 contacting the sand and gravel, the rectangular plate 19 always maintains the first state. The following process refers to Figure 7 , after the blade 103 leaves the water surface, the rectangular plate 19 contacts the stop rod 21. The stop rod 21 blocks the rectangular plate 19 and flips the rectangular plate 19 towards the side away from the wheel shaft 101, and the rectangular plate 19 enters the third state. The excess sand and gravel on the blade 103 will then slide down under the action of gravity and return to the washing tank 2. As the blade 103 continues to rotate, the rectangular plate 19 separates from the stop rod 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 and gravel transported by each blade 103 is relatively consistent, avoiding the situation where too much sand and gravel causes insufficient separation between the sand and gravel and the blade 103.

[0042] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope 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 wheel shaft (101) and two wheel frames (102) fixedly mounted on the wheel shaft (101), and a plurality of blades (103) are evenly mounted between the two wheel frames (102) along the circumferential direction, characterized in that: The blade (103) comprises a solid part (1031) and a hollow part (1032); the blade (103) and the wheel frame (102) are slidably matched, and the sliding direction of the blade (103) is parallel to itself; The blade (103) has a normal state and a discharging state; in the normal state, the inner edge of the hollow portion (1032) in the blade (103) is in contact with the inner side surface of the solid portion (1031) in the adjacent blade (103); in the discharging state, the inner edge of the hollow portion (1032) in the blade (103) is separated from the inner side surface of the solid portion (1031) in the adjacent blade (103); the washing tank (2) has a discharging position and a loading position; when the blade (103) rotates to the discharging position corresponding to the washing tank (2), it switches from the normal state to the discharging state; after the sand and gravel on the blade (103) are separated from the blade (103), the blade (103) switches from the discharging state to the normal state.

2. A sand washing machine for mining according to claim 1, characterized in that: A slide groove (1021) is provided on the wheel frame (102) at a position corresponding to each blade (103), and round rods (104) movably matched with the slide groove (1021) are rotatably installed on both sides of the blade (103); an arc-shaped guide rail (3) is fixedly installed in the washing tank (2), the guide rail (3) and the wheel shaft (101) are in a coaxial state, and a guide groove (301) movably matched 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 mounted on the inner side surface of the hollow portion (1032) via a first bracket (4); a second inclined plate (7) is fixedly mounted at a position corresponding to each blade (103) on the wheel shaft (101) via 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: A first horizontal shaft (8) parallel to the wheel shaft (101) is rotatably mounted in the washing tank (2); a plurality of rectangular first blades (9) are evenly fixedly mounted on the first horizontal shaft (8) along its circumference; and a plurality of through grooves (901) are evenly opened on the first blades (9) along the axial direction of the first horizontal shaft (8).

5. A sand washing machine for mining according to claim 4, characterized in that: A second horizontal shaft (10) parallel to the first horizontal shaft (8) and located above the first horizontal shaft (8) is rotatably mounted in the washing tank (2); a plurality of second blades (11) are evenly fixedly mounted on the second horizontal shaft (10) along its circumference; the second blades (11) are arc-shaped plates; a first pulley (12) is fixedly mounted at the end of the first horizontal shaft (8); a second pulley (13) is fixedly mounted at the end of the second horizontal shaft (10); the first pulley (12) and the second pulley (13) are connected via 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 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) 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 in a C shape, 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) where it is located, a second state in which it fits against the hollow part (1032) of the adjacent blade (103), and a third state in which it flips towards the side away from the wheel axle (101).

8. A sand washing machine for mining according to claim 7, characterized in that: An inclined rod (20) inclined downward is fixedly mounted on the inner wall of the washing tank (2) corresponding to the discharging 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 positions of the edges of the rectangular plate (19) corresponding to the inclined rod (20).

10. A sand washing machine for mining according to claim 9, characterized in that: A horizontal stop rod (21) is mounted on the inner wall of the washing tank (2) corresponding to the feeding position of the washing tank (2).

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