A heavy medium recovery device for washing coal

Abstract

The present invention provides a heavy medium recovery device for washing coal, which relates to the technical field of coal washing production, including a box body, a material inlet is arranged on the box body, and an outlet 1 and an outlet 2 are arranged at the lower end of the box body. A screen plate is arranged in the box body, and the screen plate is detachably arranged in the box body in an inclined state, and the outlet 2 is arranged below the screen plate. The present invention sets an inclined screen plate, and when material enters the box body, through the screening of the screen plate, most of the mixture of heavy medium powder and water will flow out through the outlet 2, and the next step will be carried out. The remaining coal slime and gangue will be discharged from the outlet 1. Most of the heavy medium powder can be recovered by only one screen plate. Compared with the recovery of a magnetic separator, the cost is lower, and there is no need to use a magnet, and there is no need to control the adsorption strength of the magnet. The structure is simpler and more convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of coal washing production, in particular to a heavy medium recovery device for coal washing. Background Art

[0002] In recent years, my country's economy has developed rapidly, the demand for coal resources has continued to increase, and the requirements for coal quality have also been increasing. In order to make full use of resources and meet my country's current requirements for environmental protection, the ratio of raw coal washing will be further increased; at the same time, the requirements for coal preparation accuracy are also getting higher and higher.

[0003] Most domestic coal preparation plants use magnetic separators to recover heavy media, but the cost of purchasing magnetic separators is high. In addition, whether it is an electromagnetic or permanent magnet magnetic separator, it has more wearing parts, is more difficult to maintain, and has a higher economic cost. In addition, when the magnetic separator is recycling, the size of the magnetic force must be controlled. When the magnetic force is small, the recovery effect is poor. When the magnetic force is large, the power consumption will increase, and its convenience is poor. Summary of the invention

[0004] The present invention provides a heavy medium recovery device for washing coal to solve at least one of the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a heavy medium recovery device for washing coal, comprising a box body, a material inlet is arranged on the box body, outlet one and outlet two are arranged at the lower end of the box body, a sieve plate is arranged in the box body, the sieve plate is detachably arranged in the box body in an inclined state, and outlet two is arranged below the sieve plate.

[0006] Preferably, the lower surface of the box body includes two horizontal sections and one inclined section, wherein outlet 1 is installed on one horizontal section and outlet 2 is installed on the other horizontal section; a plurality of support rods are also fixedly arranged on the lower surface of the box body.

[0007] Preferably, a mounting plate is fixedly provided on the left side wall of the box body, a driving motor is fixedly provided on the lower side of the mounting plate, a rotating rod is fixedly connected to the right output end of the driving motor, the rotating rod rotates and extends into the box body, the rotating rod is rotatably connected to the right side wall of the box body, a reciprocating screw rod is provided on the rotating rod, a movable plate is installed on the reciprocating screw rod, the movable plate is slidably connected to the upper side wall of the box body, and a plurality of stirring rods are also fixedly provided on the rotating rod, and the stirring rods are located on the right side of the movable plate.

[0008] Preferably, a swivel is fixedly provided on the rotating rod, and protrusions are symmetrically provided on the swivel. U-shaped rods are slidably provided on the front and rear sides of the box body. A plurality of springs and a plurality of vibration rods are fixedly provided on the sides of the U-shaped rods close to each other. The other end of the spring is fixedly connected to the box body, and a matching portion is fixedly installed on one end of the U-shaped rod, and the matching portion matches the protrusion.

[0009] Preferably, a water tank is fixedly provided on the left side wall of the box body, a water outlet pipe is provided through the water tank, the other end of the water outlet pipe is connected to a driving box, a pressure plate is slidably provided in the driving box, a matching rod is fixedly provided on the upper end of the pressure plate, the matching rod slidably extends out of the driving box, the matching rod cooperates with the protruding portion, a return spring is sleeved on the matching rod, one end of the return spring is fixedly provided on the upper inner wall of the driving box, the other end of the return spring is fixedly connected to the pressure plate, an L-shaped pipe is fixedly provided at the lower end of the driving box, the L-shaped pipe is fixedly connected to the box body, a nozzle assembly is provided at the other end of the L-shaped pipe, and the nozzle assembly extends into the box body.

[0010] Preferably, the nozzle assembly includes two connecting pipes, which are through-connected with the L-shaped pipe. The other end of the connecting pipe is through-connected and rotatably connected to a vertical pipe. The vertical pipe is sealed and rotated upward to extend into the box body. The upper end of the vertical pipe is also through-connected with a nozzle, and the nozzle faces the material inlet.

[0011] Preferably, a vertical rod is fixedly provided on the lower surface of the U-shaped rod, a rack is fixedly provided on the side where the lower ends of the vertical rods are close to each other, a gear is fixedly provided on the vertical tube, the rack on the front side is meshed with the left side of the gear on the front side, and the rack on the rear side is meshed with the right side of the gear on the rear side.

[0012] Preferably, a power box is installed on the L-shaped pipe, and front and rear symmetrical fan blades are arranged in the power box. A rotating shaft 1 is fixedly arranged on the side where the fan blades are away from each other, and the rotating shaft 1 rotates and extends out of the power box. A power reversing member is arranged on the other end of the rotating shaft 1, and the other end of the power reversing member is connected to the rotating shaft 2. A universal joint is arranged on the rotating shaft 2, and the other end of the universal joint is fixedly connected to the reciprocating screw rod 2. The other end of the reciprocating screw rod 2 is rotatably connected to a fixed block, which is fixedly arranged on the box body, and a cleaning mechanism is arranged on the reciprocating screw rod 2.

[0013] Preferably, the power reversing member includes a power reversing box, which is fixedly arranged on the box body, and the other end of rotating shaft one rotates and extends into the power reversing box, the other end of rotating shaft one is fixedly connected with bevel gear one, and the right side of bevel gear one is meshedly connected with bevel gear two, and the other end of bevel gear two is fixedly connected with rotating shaft two, and rotating shaft two rotates and extends out of the power reversing box.

[0014] Preferably, the cleaning mechanism includes a connecting block, which is mounted on a reciprocating screw rod 2. A connecting rod is provided on the side where the front and rear connecting blocks are close to each other. Inclined grooves are provided on the front and rear side walls of the box body. The connecting rod extends into the box body from the inclined groove. The connecting rod is slidably connected to the inclined groove, and a seal is provided on the inclined groove. A scraper is also fixedly provided on the connecting rod, and the scraper abuts against the upper surface of the screen plate.

[0015] Compared with the prior art, the present invention provides a heavy medium recovery device for washing coal, which has the following beneficial effects: the present invention arranges an inclined screen plate, and when material enters the box, the vast majority of the mixture of heavy medium powder and water will flow out through outlet two through screening by the screen plate to proceed to the next process, and the remaining coal slime and gangue will be discharged from outlet one. Most of the heavy medium powder can be recovered by only one screen plate. Compared with the recovery of a magnetic separator, the cost is lower, and there is no need to use magnets or control the adsorption strength of the magnets. The structure is simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the installation of the rotating rod of the present invention;

[0019] Figure 3 For the present invention Figure 2 A top view of

[0020] Figure 4 For the present invention Figure 2 Side view of

[0021] Figure 5 It is a schematic diagram of the installation of the vertical pipe of the present invention;

[0022] Figure 6 It is a schematic diagram of the installation of the power box of the present invention;

[0023] Figure 7 It is a schematic diagram of the installation of the reciprocating screw rod 2 of the present invention;

[0024] Figure 8 It is a schematic structural diagram of the scraper of the present invention.

[0025] In the figure: 1, box body; 2, sieve plate; 3, material inlet; 4, outlet 2; 5, inclined section; 6, outlet 1; 7, support rod; 8, drive motor; 9, mounting plate; 10, raised part; 11, rotating rod; 12, moving plate; 13, reciprocating screw rod 1; 14, stirring rod; 15, swivel; 16, vertical pipe; 17, vibrating rod; 18, spring; 19, U-shaped rod; 20, matching part; 21, water tank; 22, water outlet pipe; 23, pressure plate ; 24. L-shaped pipe; 25. Drive box; 26. Return spring; 27. Matching rod; 28. Vertical rod; 29. ​​Gear; 30. Connecting pipe; 31. Rack; 32. Nozzle; 33. Power box; 34. Fan blade; 35. Rotating shaft one; 36. Power reversing box; 37. Bevel gear two; 38. Bevel gear one; 39. Rotating shaft two; 40. Universal joint; 41. Reciprocating screw two; 42. Connecting block; 43. Scraper; 44. Connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example 1

[0030] The embodiment of the present invention provides a heavy medium recovery device for washing coal, such as Figure 1-8As shown, it includes a box body 1, a material inlet 3 is arranged on the box body 1, an outlet 1 6 and an outlet 2 4 are arranged at the lower end of the box body 1, a sieve plate 2 is arranged in the box body 1, the sieve plate 2 is detachably arranged in the box body 1 in an inclined state, and the outlet 2 4 is arranged below the sieve plate 2.

[0031] Among them, the heavy medium is heavy medium powder. In the coal industry, heavy medium powder is generally iron powder or magnetic powder.

[0032] The box body 1 is provided with an observation port, the box body 1 is also provided with a through pipe, and the through pipe is provided with a valve.

[0033] The working principle and beneficial effects of the above technical solution are as follows: the material enters the box body 1 from the material inlet 3, and then falls into the sieve plate 2. The sieve plate 2 sieves out most of the mixture of heavy medium powder and water, and then the mixture of heavy medium powder and water flows out through the outlet 4. The remaining coal slime and gangue slide from the sieve plate 2 to the outlet 6, and then are discharged from the outlet 6. At this time, most of the mixture of heavy medium powder and water enters the next process. Most of the heavy medium powder can be recovered by only one sieve plate 2. Compared with the recovery of the magnetic separator, it has lower cost and convenient maintenance, and does not require the use of magnets, nor does it require the control of the adsorption strength of the magnets. The structure is simpler and more convenient to use.

[0034] Example 2

[0035] On the basis of the above-mentioned embodiment 1, Figure 1 As shown, the lower surface of the box body 1 includes two horizontal sections and an inclined section 5, one of the horizontal sections is equipped with an outlet 1 6, and the other horizontal section is equipped with an outlet 2 4; a plurality of support rods 7 are also fixedly arranged on the lower surface of the box body 1.

[0036] The working principle and beneficial effects of the above technical solution are as follows: when the mixture of heavy medium powder and water passes through the sieve plate 2, it will fall onto the inclined section 5, and then flow out from the outlet 2 4 under the action of gravity; the setting of the inclined section 5 facilitates the outflow of the mixture of heavy medium powder and water, and is more practical; and the setting of a plurality of support rods 7 can make the box body 1 more temperature-controlled and safer.

[0037] Example 3

[0038] On the basis of the above-mentioned embodiments 1-2, Figure 1-4As shown, a mounting plate 9 is fixedly provided on the left side wall of the box body 1, a driving motor 8 is fixedly provided on the lower side of the mounting plate 9, a rotating rod 11 is fixedly connected to the right output end of the driving motor 8, the rotating rod 11 rotates and extends into the box body 1, the rotating rod 11 is rotatably connected to the right side wall of the box body 1, a reciprocating screw rod 13 is provided on the rotating rod 11, a movable plate 12 is installed on the reciprocating screw rod 13, the movable plate 12 is slidably connected to the upper side wall of the box body 1, a plurality of stirring rods 14 are also fixedly provided on the rotating rod 11, and the stirring rod 14 is located on the right side of the movable plate 12.

[0039] The working principle and beneficial effects of the above technical solution are as follows: when the material enters the box body 1 through the material inlet 3, the drive motor 8 is started, the drive motor 8 drives the rotating rod 11 to start rotating, the rotating rod 11 drives the reciprocating screw rod 13 to rotate, and the reciprocating screw rod 13 drives the moving plate 12 to start moving (such as Figure 2 As shown, the length of the reciprocating screw rod 13 is relatively short, that is, the moving range of the movable plate 12 is small). The movable plate 12 will block the incoming material, which can effectively avoid the situation where a large amount of material enters and the screen plate 2 has no time to screen and is directly discharged from the outlet 6, which can effectively reduce the waste of heavy medium powder. At the same time, the movable plate 12 will block the material, so that the material can fully contact with the screen plate 2, and the screening is more perfect; and the rotation of the rotating rod 11 will also drive the rotation of the plurality of stirring rods 14, and the plurality of stirring rods 14 will perform a simple stirring on the material entering the box body 1, so that the material is more uniform, the screening speed of the screen plate 2 will be faster, and the practicality and functionality will be stronger.

[0040] Example 4

[0041] Based on the above embodiment 3, Figure 1-4 As shown, a swivel 15 is fixedly provided on the rotating rod 11, and a protrusion 10 is symmetrically provided on the swivel 15. U-shaped rods 19 are slidably provided on the front and rear sides of the box body 1, and a plurality of springs 18 and a plurality of vibration rods 17 are fixedly provided on the side of the U-shaped rods 19 close to each other. The other end of the spring 18 is fixedly connected to the box body 1, and a matching portion 20 is fixedly installed on one end of the U-shaped rod 19, and the matching portion 20 matches with the protrusion 10.

[0042] The working principle and beneficial effects of the above technical solution are as follows: when the rotating rod 11 starts to rotate, the rotating rod 11 will drive the rotating ring 15 to rotate together, and the raised portion 10 on the rotating ring 15 will also rotate together, and the raised portion 10 will continuously contact the two matching portions 20. When the raised portion 10 contacts the matching portion 20, the U-shaped rod 19 will be moved away from the box body 1. When the raised portion 10 does not contact the matching portion 20, the U-shaped rod 19 will be reset under the action of a plurality of springs 18. During the reset, a plurality of vibration rods 17 will contact the front and rear side walls of the box body 1, thereby vibrating the box body 1, thereby making the coal slime and gangue slide up and down the screen plate 2 faster and the discharge efficiency higher.

[0043] Example 5

[0044] On the basis of the above-mentioned embodiment 4, Figure 1-5 As shown, a water tank 21 is fixedly provided on the left side wall of the box body 1, and a water outlet pipe 22 is provided through the water tank 21, and the other end of the water outlet pipe 22 is connected to a driving box 25, and a pressure plate 23 is slidably provided in the driving box 25, and a matching rod 27 is fixedly provided on the upper end of the pressure plate 23, and the matching rod 27 slides and extends out of the driving box 25, and the matching rod 27 cooperates with the protrusion 10, and a return spring 26 is sleeved on the matching rod 27, and one end of the return spring 26 is fixedly provided on the upper inner wall of the driving box 25, and the other end of the return spring 26 is fixedly connected to the pressure plate 23, and an L-shaped pipe 24 is fixedly provided at the lower end of the driving box 25, and the L-shaped pipe 24 is fixedly connected to the box body 1, and a nozzle assembly is provided at the other end of the L-shaped pipe 24, and the nozzle assembly extends into the box body 1.

[0045] Among them, preferably, the nozzle assembly includes two connecting pipes 30, which are connected to the L-shaped pipe 24, and the other end of the connecting pipe 30 is connected to the vertical pipe 16 through rotation, and the vertical pipe 16 is sealed and rotated upward to extend into the box body 1, and the upper end of the vertical pipe 16 is also connected to the nozzle 32, and the nozzle 32 faces the material inlet 3.

[0046] Among them, preferably, a vertical rod 28 is fixedly provided on the lower surface of the U-shaped rod 19, a rack 31 is fixedly provided on the side where the lower ends of the vertical rod 28 are close to each other, and a gear 29 is fixedly provided on the vertical tube 16, the rack 31 located on the front side is meshed with the left side of the gear 29 on the front side, and the rack 31 located on the rear side is meshed with the right side of the gear 29 on the rear side.

[0047] Wherein, both the water outlet pipe 22 and the L-shaped pipe 24 are provided with a one-way valve.

[0048] The working principle and beneficial effects of the above technical solution are as follows: when the rotating ring 15 starts to rotate, the protrusion 10 on 15 will continuously contact the matching rod 27. When the protrusion 10 contacts the matching rod 27, the matching rod 27 will drop, and the matching rod 27 drives the pressure plate 23 to drop, squeezing the water in the driving box 25 into the L-shaped pipe 24. When the protrusion 10 does not contact the matching rod 27, the pressure plate 23 is reset under the action of the reset spring 26. When the pressure plate 23 is reset, negative pressure is generated in the driving box 25, thereby The water in the water tank 21 enters the driving box 25 through the water outlet pipe 22. As the rotating ring 15 rotates continuously, the protrusion 10 will continuously contact the matching rod 27, so that the water in the water tank 21 continuously enters the connecting pipe 30 through the L-shaped pipe 24, and then the water enters the vertical pipe 16, and finally sprayed out from the nozzle 32, thereby impacting the screen plate 2, which can further accelerate the speed of the coal slime and gangue sliding up and down on the screen plate 2, and can also accelerate the screening speed of the screen plate 2;

[0049] When the U-shaped rod 19 is continuously moved away from the box body 1 and reset, the U-shaped rod 19 will drive the vertical rod 28 to move, and the vertical rod 28 will drive the rack 31 to move, and the rack 31 located on the front side drives the gear 29 on the front side to rotate, so that the angle of the vertical pipe 16 on the front side changes, and the rack 31 located on the rear side drives the gear 29 on the rear side to rotate, so that the angle of the vertical pipe 16 on the rear side changes, that is, the spraying angle of the nozzle 32 changes, so that water will be sprayed to various positions of the screen plate 2, further accelerating the speed at which the slime and gangue slide up and down the screen plate 2;

[0050] At the same time, after the screening of the sieve plate 2 is completed, the nozzle 32 can also perform a simple cleaning on the sieve plate 2 by spraying water, which is more practical and clean. The water spraying of the nozzle 32 can also form turbulence in the box 1, so that the material can be more uniform.

[0051] Example 6

[0052] On the basis of the above-mentioned embodiment 5, a power box 33 is interrupted and installed on the L-shaped pipe 24, and front and rear symmetrical fan blades 34 are arranged in the power box 33. A rotating shaft 35 is fixedly arranged on the side where the fan blades 34 are away from each other. The rotating shaft 35 rotates and extends out of the power box 33. The other end of the rotating shaft 35 is provided with a power reversing member. The other end of the power reversing member is connected to a rotating shaft 2 39. A universal joint 40 is arranged on the rotating shaft 2 39. The other end of the universal joint 40 is fixedly connected to a reciprocating screw rod 2 41. The other end of the reciprocating screw rod 2 41 is rotatably connected to a fixed block. The fixed block is fixedly arranged on the box body 1, and a cleaning mechanism is arranged on the reciprocating screw rod 2 41.

[0053] Among them, preferably, the power reversing member includes a power reversing box 36, the power reversing box 36 is fixedly arranged on the box body 1, the other end of the rotating shaft 35 rotates and extends into the power reversing box 36, the other end of the rotating shaft 35 is fixedly connected with a bevel gear 1 38, the right side of the bevel gear 1 38 is meshedly connected with a bevel gear 2 37, the other end of the bevel gear 2 37 is fixedly connected with a rotating shaft 2 39, and the rotating shaft 2 39 rotates and extends out of the power reversing box 36.

[0054] Among them, preferably, the cleaning mechanism includes a connecting block 42, which is installed on the reciprocating screw rod 41, and a connecting rod 44 is provided on the side where the front and rear connecting blocks 42 are close to each other. The front and rear side walls of the box body 1 are provided with inclined grooves, and the connecting rod 44 extends from the inclined groove into the box body 1. The connecting rod 44 is slidably connected to the inclined groove, and a seal is provided on the inclined groove. A scraper 43 is also fixedly provided on the connecting rod 44, and the scraper 43 abuts against the upper surface of the screen plate 2.

[0055] The working principle and beneficial effects of the above technical solution are as follows: when water continuously enters the L-shaped pipe 24, the water will flow into the power box 33, the flow of water will drive the fan blades 34 to rotate, the rotation of the fan blades 34 drives the rotation of the rotating shaft 1 35, the rotation of the rotating shaft 1 35 drives the rotation of the bevel gear 1 38, the rotation of the bevel gear 1 38 drives the rotation of the bevel gear 2 37, the bevel gear 2 37 drives the rotation of the rotating shaft 2 39, the rotating shaft 2 39 is adjusted by the universal joint 40 to change the angle, and then the universal joint 40 drives the reciprocating screw rod 2 41 to rotate, and the rotation of the reciprocating screw rod 2 41 The connecting block 42 moves on the reciprocating screw rod 41. When the connecting block 42 moves, the connecting block 42 will drive the connecting rod 44 to move in the box body 1. The connecting rod 44 drives the scraper 43 to scrape the upper surface of the sieve plate 2, thereby pushing the coal slime and gangue to slide down the sieve plate 2. At the same time, after the screening is completed, the coal slime and gangue remaining on the upper surface of the sieve plate 2 can also be scraped off, and the sieve plate 2 can be cleaned by cooperating with the water sprayed from the nozzle 32, and the rotation of the fan blade 34 is driven by the water flow. The structure is more ingenious, and its practicality and innovation are stronger.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A heavy medium recovery device for coal washing, characterized in that: The box body (1) comprises a material inlet (3) provided on the box body (1), a first outlet (6) and a second outlet (4) provided at the lower end of the box body (1), a sieve plate (2) provided in the box body (1), the sieve plate (2) being detachably arranged in the box body (1) in an inclined state, and the second outlet (4) being arranged below the sieve plate (2); A mounting plate (9) is fixedly arranged on the left side wall of the box body (1), a driving motor (8) is fixedly arranged on the lower side of the mounting plate (9), a rotating rod (11) is fixedly connected to the right output end of the driving motor (8), the rotating rod (11) rotates and extends into the box body (1), the rotating rod (11) is rotatably connected to the right side wall of the box body (1), a reciprocating screw rod (13) is arranged on the rotating rod (11), a moving plate (12) is installed on the reciprocating screw rod (13), the moving plate (12) is slidably connected to the upper side wall of the box body (1), and a plurality of stirring rods (14) are fixedly arranged on the rotating rod (11), and the stirring rods (14) are located on the right side of the moving plate (12); A rotating ring (15) is fixedly provided on the rotating rod (11), and a protrusion (10) is symmetrically provided on the rotating ring (15). U-shaped rods (19) are slidably provided on the front and rear sides of the box body (1), and a plurality of springs (18) and a plurality of vibration rods (17) are fixedly provided on the sides of the U-shaped rods (19) close to each other, and the other end of the spring (18) is fixedly connected to the box body (1), and a matching portion (20) is fixedly installed on one end of the U-shaped rod (19), and the matching portion (20) matches the protrusion (10); A water tank (21) is fixedly arranged on the left side wall of the box body (1), a water outlet pipe (22) is provided through the water tank (21), the other end of the water outlet pipe (22) is connected through the driving box (25), a pressing plate (23) is slidably arranged in the driving box (25), a matching rod (27) is fixedly arranged on the upper end of the pressing plate (23), the matching rod (27) slidably extends out of the driving box (25), the matching rod (27) is matched with the protruding portion (10), a return spring (26) is sleeved on the matching rod (27), one end of the return spring (26) is fixedly arranged on the upper inner wall of the driving box (25), the other end of the return spring (26) is fixedly connected to the pressing plate (23), an L-shaped pipe (24) is fixedly arranged on the lower end of the driving box (25), the L-shaped pipe (24) is fixedly connected to the box body (1), a nozzle assembly is provided at the other end of the L-shaped pipe (24), and the nozzle assembly extends into the box body (1); The nozzle assembly comprises two connecting pipes (30), the connecting pipes (30) are connected to the L-shaped pipe (24), the other end of the connecting pipe (30) is connected to the vertical pipe (16) in a through-connected manner, the vertical pipe (16) is sealed and rotated upward to extend into the box body (1), and the upper end of the vertical pipe (16) is also connected to the nozzle (32), and the nozzle (32) faces the material inlet (3); A vertical rod (28) is fixedly arranged on the lower surface of the U-shaped rod (19), a rack (31) is fixedly arranged on the side of the lower ends of the vertical rod (28) close to each other, and a gear (29) is fixedly arranged on the vertical tube (16), the rack (31) located on the front side meshes with the left side of the gear (29) on the front side, and the rack (31) located on the rear side meshes with the right side of the gear (29) on the rear side.

2. A heavy medium recovery device for coal washing according to claim 1, characterized in that: The lower surface of the box body (1) comprises two horizontal sections and an inclined section (5), one of the horizontal sections being provided with an outlet 1 (6) and the other horizontal section being provided with an outlet 2 (4); a plurality of support rods (7) are also fixedly arranged on the lower surface of the box body (1).

3. A heavy medium recovery device for coal washing according to claim 1, characterized in that: A power box (33) is installed in the L-shaped pipe (24), and front and rear symmetrical fan blades (34) are arranged in the power box (33). A rotating shaft (35) is fixedly arranged on the side of the fan blades (34) away from each other. The rotating shaft (35) is rotatably extended out of the power box (33). The other end of the rotating shaft (35) is provided with a power reversing member. The other end of the power reversing member is connected to the second rotating shaft (39). The second rotating shaft (39) is provided with a universal joint (40). The other end of the universal joint (40) is fixedly connected to the second reciprocating screw rod (41). The other end of the reciprocating screw rod (41) is rotatably connected to a fixed block. The fixed block is fixedly arranged on the box body (1). The reciprocating screw rod (41) is provided with a cleaning mechanism.

4. A heavy medium recovery device for coal washing according to claim 3, characterized in that: The power reversing member comprises a power reversing box (36), the power reversing box (36) is fixedly arranged on the box body (1), the other end of the rotating shaft 1 (35) is rotatably extended into the power reversing box (36), the other end of the rotating shaft 1 (35) is fixedly connected to the bevel gear 1 (38), the right side of the bevel gear 1 (38) is meshingly connected to the bevel gear 2 (37), the other end of the bevel gear 2 (37) is fixedly connected to the rotating shaft 2 (39), and the rotating shaft 2 (39) is rotatably extended out of the power reversing box (36).

5. A heavy medium recovery device for coal washing according to claim 3, characterized in that: The cleaning mechanism comprises a connecting block (42), the connecting block (42) being mounted on the reciprocating screw rod (41); a connecting rod (44) being arranged on the side of the front and rear connecting blocks (42) close to each other; an inclined groove being arranged on the front and rear side walls of the box body (1); the connecting rod (44) extending from the inclined groove into the box body (1); the connecting rod (44) being slidably connected to the inclined groove; a sealing member being arranged on the inclined groove; a scraper (43) being fixedly arranged on the connecting rod (44); the scraper (43) being in contact with the upper surface of the sieve plate (2).

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