CN118491834A - Dense medium recovery device for coal washing - Google Patents

Abstract

The invention provides a dense medium recovery device for coal washing, which relates to the technical field of coal washing production and comprises a box body, wherein a material inlet is arranged on the box body, the lower end of the box body is provided with a first outlet and a second outlet, a sieve plate is arranged in the box body, the sieve plate is detachably arranged in the box body in an inclined state, and the second outlet is arranged below the sieve plate. According to the invention, by arranging the inclined sieve plate, after materials enter the box body, most of mixture of heavy medium powder and water flows out through the second outlet through the sieve plate, the rest coal slime, gangue and the like can be discharged from the first outlet in the next process, and the recovery of most of heavy medium powder can be completed through only one sieve plate.

Description

A heavy medium recovery device for washing coal

Technical Field

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

Background Art

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 environmental protection requirements, 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.

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 recovering, it is also necessary to control the size of the magnetic force. When the magnetic force is small, the recovery effect is poor. When the magnetic force is large, the power consumption will increase accordingly, and its convenience is poor.

Summary of the invention

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.

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.

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

Preferably, a mounting plate is fixedly provided on the left side wall of the box, 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, the rotating rod is rotatably connected to the right side wall of the box, 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, 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.

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.

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.

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 with 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.

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.

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 is fixedly arranged on the side where the fan blades are away from each other, and the rotating shaft rotates and extends out of the power box. A power reversing member is arranged on the other end of the rotating shaft, and the other end of the power reversing member is connected to the rotating shaft. A universal joint is arranged on the rotating shaft, and the other end of the universal joint is fixedly connected to a reciprocating screw rod 2, and 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.

Preferably, the power reversing member includes a power reversing box, which is fixedly arranged on the box body, and the other end of the rotating shaft rotates and extends into the power reversing box, the other end of the rotating shaft is fixedly connected to bevel gear 1, and the right side of bevel gear 1 is meshedly connected to bevel gear 2, and the other end of bevel gear 2 is fixedly connected to the rotating shaft, and the rotating shaft rotates and extends out of the power reversing box.

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.

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

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:

Fig. 1 is a schematic diagram of the structure of the present invention;

FIG2 is a schematic diagram of the installation of the rotating rod of the present invention;

FIG3 is a top view of FIG2 of the present invention;

FIG4 is a side view of FIG2 of the present invention;

FIG5 is a schematic diagram of the installation of a vertical pipe of the present invention;

FIG6 is a schematic diagram of the installation of the power box of the present invention;

FIG7 is a schematic diagram of the installation of the reciprocating screw rod 2 of the present invention;

FIG. 8 is a schematic structural diagram of a scraper according to the present invention.

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, rotating ring; 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; 36, power reversing box; 37, bevel gear two; 38, bevel gear one; 39, rotating shaft; 40, universal joint; 41, reciprocating screw rod two; 42, connecting block; 43, scraper; 44, connecting rod.

DETAILED DESCRIPTION

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.

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.

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.

Example 1

An embodiment of the present invention provides a heavy medium recovery device for washing coal, as shown in Figures 1-8, including a box body 1, a material inlet 3 is provided on the box body 1, an outlet 1 6 and an outlet 2 4 are provided at the lower end of the box body 1, a sieve plate 2 is provided 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.

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

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.

Among them, the mixture of heavy medium powder and water flows out of the outlet 2 4, which can be directly put into the coal preparation process again. After the magnetic separator sucks out the heavy medium powder, water needs to be added for secondary use. Therefore, the above method can effectively reduce the coal preparation process;

In addition, if the amount of water added is difficult to adjust during the addition of heavy medium powder in the coal preparation process, then outlet 2 4 can also be connected to a dehydration mechanism (the dehydration mechanism can be existing technology) to separate the heavy medium powder from the water, and then the heavy medium powder can be reused and the sewage can be purified.

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.

Example 2

On the basis of the above-mentioned embodiment 1, as shown in FIG1 , the lower surface of the box body 1 includes two horizontal sections and an inclined section 5, wherein one horizontal section is provided with an outlet 1 6, and the other horizontal section is provided with an outlet 2 4; a plurality of support rods 7 are also fixedly provided on the lower surface of the box body 1.

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.

Example 3

On the basis of the above-mentioned embodiments 1-2, as shown in Figure 1-4, 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, and a plurality of stirring rods 14 are fixedly provided on the rotating rod 11, and the stirring rod 14 is located on the right side of the movable plate 12.

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, at this time, the driving motor 8 is started, the driving 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 (as shown in Figure 2, the length of the reciprocating screw rod 13 is relatively short, that is, the moving range of the moving plate 12 is small), the moving plate 12 will block the entering material, which can effectively avoid the situation where a large amount of material enters and the sieve 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 moving plate 12 will block the material, so that the material can fully contact the sieve 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 sieve plate 2 will be faster, and the practicality and functionality will be stronger.

Example 4

On the basis of the above-mentioned embodiment 3, as shown in Figures 1-4, a swivel ring 15 is fixedly provided on the rotating rod 11, and the protrusions 10 are symmetrically provided on the swivel 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. 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.

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 protrusion 10 on the rotating ring 15 will also rotate together, and the protrusion 10 will continuously contact the two matching parts 20. When the protrusion 10 contacts the matching part 20, the U-shaped rod 19 will be moved away from the box body 1. When the protrusion 10 does not contact the matching part 20, the U-shaped rod 19 will be reset under the action of a plurality of springs 18. When resetting, 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.

Example 5

On the basis of the above-mentioned embodiment 4, as shown in Figures 1-5, 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 the 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 protruding portion 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.

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.

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.

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

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 also 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;

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 at the front side drives the gear 29 at the front side to rotate, so that the angle of the vertical pipe 16 at the front side changes, and the rack 31 located at the rear side drives the gear 29 at the rear side to rotate, so that the angle of the vertical pipe 16 at 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;

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.

Example 6

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. A power reversing member is arranged at the other end of the rotating shaft 35. The other end of the power reversing member is connected to a rotating shaft 39. A universal joint 40 is arranged on the rotating shaft 39. The other end of the universal joint 40 is fixedly connected to a 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, and a cleaning mechanism is arranged on the reciprocating screw rod 41.

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 39, and the rotating shaft 39 rotates and extends out of the power reversing box 36.

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.

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 rotating shaft 35 to rotate, the rotation of the rotating shaft 35 drives the bevel gear 1 38 to rotate, the rotation of the bevel gear 1 38 drives the bevel gear 2 37 to rotate, the bevel gear 2 37 drives the rotating shaft 39 to rotate, the rotating shaft 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 makes 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.

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 (10)

1. The utility model provides a heavy media recovery unit for coal washing, its characterized in that, including box (1), be provided with material import (3) on box (1), box (1) lower extreme divide to be equipped with export one (6) and export two (4), is provided with sieve (2) in box (1), and sieve (2) are inclined state and can dismantle and set up in box (1), export two (4) set up in sieve (2) below.

2. The heavy medium recovery device for coal washing according to claim 1, wherein the lower surface of the box body (1) comprises two horizontal sections and a inclined section (5), wherein one horizontal section is provided with an outlet I (6), and the other horizontal section is provided with an outlet II (4); the lower surface of the box body (1) is also fixedly provided with a plurality of supporting rods (7).

3. The heavy medium recovery device for coal washing according to claim 1, wherein 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 side output end of the driving motor (8), the rotating rod (11) rotates and extends into the box body (1), the rotating rod (11) is rotationally connected with the right side wall of the box body (1), a first reciprocating screw (13) is arranged on the rotating rod (11), a movable plate (12) is arranged on the first reciprocating screw (13), the movable plate (12) is in sliding connection with the upper side wall of the box body (1), a plurality of stirring rods (14) are fixedly arranged on the rotating rod (11), and the stirring rods (14) are positioned on the right side of the movable plate (12).

4. The heavy medium recovery device for coal washing according to claim 3, wherein a swivel (15) is fixedly arranged on a rotating rod (11), protruding portions (10) are symmetrically arranged on the swivel (15), U-shaped rods (19) are slidably arranged on the front side and the rear side of the box body (1), a plurality of springs (18) and a plurality of vibrating rods (17) are fixedly arranged on one sides, close to each other, of the U-shaped rods (19), the other ends of the springs (18) are fixedly connected to the box body (1), one ends of the U-shaped rods (19) are fixedly provided with matching portions (20), and the matching portions (20) are matched with the protruding portions (10).

5. The heavy medium recovery device for coal washing according to claim 4, wherein a water tank (21) is fixedly arranged on the left side wall of the box body (1), a water outlet pipe (22) is arranged on the water tank (21) in a penetrating manner, a driving box (25) is connected to the other end of the water outlet pipe (22) in a penetrating manner, a pressing plate (23) is arranged in the driving box (25) in a sliding manner, a matching rod (27) is fixedly arranged at the upper end of the pressing plate (23), the matching rod (27) is slidably extended out of the driving box (25), the matching rod (27) is matched with the protruding portion (10), a reset spring (26) is sleeved on the matching rod (27), one end of the reset spring (26) is fixedly arranged on the inner wall of the upper side of the driving box (25), the other end of the reset spring (26) is fixedly connected to the pressing plate (23), an L-shaped pipeline (24) is fixedly arranged at the lower end of the driving box (25), the L-shaped pipeline (24) is fixedly connected to the box body (1), and a spray head assembly is arranged at the other end of the L-shaped pipeline (24) and extends into the box body (1).

6. The dense medium recovery device for coal washing according to claim 5, wherein the spray head assembly comprises two connecting pipes (30), the connecting pipes (30) are in through connection with the L-shaped pipeline (24), the other ends of the connecting pipes (30) are in through rotation connection with vertical pipes (16), the vertical pipes (16) extend into the box body (1) in an upward sealing rotation mode, spray heads (32) are further in through connection with the upper ends of the vertical pipes (16), and the spray heads (32) face the material inlet (3).

7. The heavy medium recovery device for coal washing according to claim 6, wherein a vertical rod (28) is fixedly arranged on the lower surface of the U-shaped rod (19), racks (31) are fixedly arranged on one sides, close to each other, of the lower ends of the vertical rods (28), gears (29) are fixedly arranged on the vertical tubes (16), the racks (31) on the front side are meshed with the left side of the gears (29) on the front side, and the racks (31) on the rear side are meshed with the right side of the gears (29) on the rear side.

8. The heavy medium recovery device for coal washing according to claim 6, wherein the power box (33) is installed on the L-shaped pipeline (24) in a breaking way, front and rear symmetrical fan blades (34) are arranged in the power box (33), a rotating shaft (35) is fixedly arranged on one side, away from each other, of each fan blade (34), the rotating shaft (35) rotates to extend out of the power box (33), a power reversing piece is arranged at the other end of the rotating shaft (35), a rotating shaft (39) is connected with the other end of the power reversing piece, a universal joint (40) is arranged on the rotating shaft (39), a reciprocating screw rod II (41) is fixedly connected with the other end of the universal joint (40), a fixed block is rotationally connected with the other end of the reciprocating screw rod II (41), the fixed block is fixedly arranged on the box (1), and a cleaning mechanism is arranged on the reciprocating screw rod II (41).

9. The heavy medium recovery device for coal washing according to claim 8, wherein the power reversing piece 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 (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 I (38), the right side of the bevel gear I (38) is connected with a bevel gear II (37) in a meshed manner, the other end of the bevel gear II (37) is fixedly connected with a rotating shaft (39), and the rotating shaft (39) rotates and extends out of the power reversing box (36).

10. The heavy medium recovery device for coal washing according to claim 8, wherein the cleaning mechanism comprises a connecting block (42), the connecting block (42) is arranged on a reciprocating screw rod II (41), a connecting rod (44) is arranged on one side, close to each other, of the front connecting block (42) and the rear connecting block (42), inclined grooves are formed in the front side wall and the rear side wall of the box body (1), the connecting rod (44) extends into the box body (1) from the inclined grooves, the connecting rod (44) is in sliding connection with the inclined grooves, sealing elements are arranged on the inclined grooves, a scraping plate (43) is fixedly arranged on the connecting rod (44), and the scraping plate (43) is abutted against the upper surface of the sieve plate (2).