CN111359870A

CN111359870A - Water abrasive particle-based separation device, system and separation method

Info

Publication number: CN111359870A
Application number: CN202010199769.6A
Authority: CN
Inventors: 吕亚利; 胡建芳
Original assignee: Shahe Lufeng Mineral Products Co ltd
Current assignee: Shahe Lufeng Mineral Products Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-07-03
Anticipated expiration: 2040-03-20
Also published as: CN111359870B

Abstract

The invention relates to a separation device of water grinding materials based on granularity, a water grinding material system and a method, comprising a water screen box body, a blanking box body with the upper end communicated with the lower end of the water screen box body, a separation screen arranged in the water screen box body, and a feeding part which is arranged on the water screen box body and is used for feeding large granular materials and small granular materials; the aperture of the separating screen is larger than the outer diameter of the small particle materials and smaller than the outer diameter of the large particle materials; the separating screen at least divides the inner cavity of the blanking box body into a mixing cavity and a blanking cavity; the mixing cavity is communicated with the feeding part, and the blanking cavity is communicated with the blanking box body; at least a portion of the separating screen and/or at least a portion of the mixing chamber are submerged in the liquid; the invention has reasonable design, compact structure and convenient use.

Description

Water abrasive particle-based separation device, system and separation method

Technical Field

The invention relates to a water mill separation device, a water mill separation system and a water mill separation method based on granularity.

Background

The abrasives include two types, namely natural abrasives and artificial abrasives. Two categories of superabrasive and common abrasive are classified according to hardness. At present, the water abrasive material has the easy characteristic of clustering after meeting water for because cluster for the granule grow can't pass through the screen cloth, generally before separating the water abrasive material, need dry with dampproofing the processing, thereby reduce the moisture content of abrasive material, thereby avoid clustering. Also adopt high-pressure squirt or other auxiliary assembly to strike the cluster group to reduce the cluster group, but adopt high-pressure squirt, need look for the cluster group, accurate impact, splash is all around, dashes unclean, and the liquid that persists can make the abrasive material of annex produce the cluster group, adopts physical methods such as rolling, and is bigger to screen cloth damage, influences screen cloth life. How to solve the technical problem and realizing the easy separation of the water grinding materials becomes a technical problem which is urgently needed to be solved.

The water abrasive materials are generally separated by adopting a vibrating screen, a shaking screen, a spiral screen, a mesh screen and the like, but the water abrasive materials can generate dust during working and pollute the environment. Thereby also adopt the water-washed dust fall of realization, because the existence of water makes the granule cohesion in addition, need adopt a large amount of water to wash it open, waste time and energy, water spatters outward and causes the waste, inefficiency. How to realize preventing raise dust polluted environment, water economy resource, rational in infrastructure's water abrasive is based on separator and the water abrasive system of granularity becomes the technical problem that the urgent need was solved.

CN201711432952.0, a safe and energy-saving sand and stone separating device is a transmission screen, and the transmission screen needs a pre-drying process, can generate dust raising and has large abrasion to a screen. CN201120497409.0, also has the above problems, and CN209406809U, a horizontally reciprocating multi-layer vibrating screen for screening particles without powder residue, also has the above problems. CN 205217091U-a vibration shaking table powder separation and collection device-discloses that is the water-washed mode, and is inefficient, washes unclean. CN 210099709U-vibration screening and material separating equipment for recycling abrasive-discloses that there is a technical problem of water-flushing technology.

Disclosure of Invention

The invention aims to solve the technical problem of providing a separation device of water grinding materials based on granularity and a water grinding material system. The invention of the invention suggests: the inventor, as a person skilled in the art, has encountered the above technical problems in actual production, and has been troubled and has not found a solution in time. Once, the inventor mixes the doughnut soup with rice (the process of the doughnut soup is that dry flour is put into a dry basin firstly, then the dough is stirred continuously while water is added, so that the doughnut soup becomes a small doughnut), and after receiving a telephone, a child pours the flour and rice particles into a face washing basin together when the child is in a chance, and fishes in water through a strainer and plays the dough. The inventor reacts to the late time . Suddenly, the inventor is glaring at first sight, seems to grasp what thought, and carefully observes and discovers the playing process of the children: 1. the flour is changed into powder and suspended in water without turning into lumps due to less water and more flour; 2. water flow is generated through strainer movement, so that rice is prevented from sinking to the bottom of the water, and rice grains blocked in meshes are pushed away in a reverse direction through the water flow through the meshes. This is not, by chance, what the water abrasive separates. The water grinding material is regarded as flour and is diluted in a large amount of water, large particles are regarded as rice, and the strainer is not just a vibrating screen. The problem of water abrasive separation is not solved, and the damage to the hard collision of the sieve material is solved.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a separation device of water grinding materials based on granularity comprises a water screen box body, a blanking box body, a separation screen and a feeding part, wherein the upper end of the blanking box body is communicated with the lower end of the water screen box body;

the aperture of the separating screen is larger than the outer diameter of the small particle materials and smaller than the outer diameter of the large particle materials;

the separating screen at least divides the inner cavity of the blanking box body into a mixing cavity and a blanking cavity;

the mixing cavity is communicated with the feeding part, and the blanking cavity is communicated with the blanking box body;

at least a portion of the separating screen and/or at least a portion of the mixing chamber are submerged in the liquid;

the blanking cavity is wholly or partially immersed in liquid;

the small-particle materials enter the blanking cavity from the mixing cavity through the separating screen;

the density of the small particle material is greater than that of the liquid.

As a further improvement of the above technical solution:

as at least one of the means including the following,

a) the separating screen is obliquely arranged in the water screen box body;

b) the separating screen is a vibrating screen, a fixed screen or a mesh screen;

c) a supporting frame for placing a separating screen is arranged in the water screen box body;

d) a clamping seat/spring seat used for being arranged in the water screen box body is arranged on the separating screen;

e) the separating screen comprises a screen plate, a vibrating screen net cage or a net bag.

f) The mixing cavity is positioned above the blanking cavity.

One end of the mixing cavity is connected with a separation part, and an output end of a separation sieve is arranged in the separation part;

from the feed to the separation point, the separating screen is arranged obliquely.

One end of the mixing cavity is communicated with a separation part, and a sending-out component input end is arranged in the separation part;

particle size based separation devices include separation lifts, separation augers or skimmers.

Comprises at least one scheme as follows:

a) the output end of the sending-out component is provided with a separation output guide plate;

b) a separating plate or a separating net is arranged between the separating part and the blanking cavity.

A discharging valve is arranged in the blanking box body and used for closing or opening the discharging valve; the output end of the discharge valve is provided with a discharge hole for outputting small-particle materials;

the small particle materials and the liquid are together or the small particle materials pass through a discharge valve.

As an extension, a discharging output mesh belt with the aperture smaller than that of the small-particle material is arranged below the discharging port, and a discharging water tank is arranged at the lower end of the discharging output mesh belt.

A circulating pump is arranged on the discharging water tank, and a liquid feeding nozzle is arranged in the blanking box body;

the liquid feeding nozzle is connected with a circulating pump or a water tank.

The separating screen is a vibrating screen, and a vibration driving part of the vibrating screen comprises a cam, a vibrating motor, a crankshaft connecting rod, a vibrating spring or a four-bar mechanism.

A water grinding material system comprises a water grinding material granularity-based separation device and a mill main machine; the output end of the sending-out component of the water-based abrasive grain separation device is provided with a separation output conveyor belt, and large-grain materials output by the separation output conveyor belt are output to a feeding part again after passing through the main machine of the mill.

A separation method of water grinding material based on granularity comprises the following steps; the premise is that at least a part of the separation sieve and/or at least a part of the mixing cavity are immersed in the pre-stored liquid level of the water sieve box body and the blanking box body, and the water level line of the water sieve box body is controlled through a liquid level overflow hole/overflow pipe;

firstly, feeding large-particle materials and small-particle materials into a mixing cavity through a feeding part, so that liquid at least soaks part of the large-particle materials and the small-particle materials; then, starting the inclined or horizontal separating screen to make the large particle materials and the small particle materials move forward in the vibration on the separating screen;

step two, in the process of moving forward on the separation screen in a vibrating manner, small particle materials fall down to a blanking cavity, and large particle materials move forward to the output end of the separation screen;

step three, firstly, opening a discharge valve aiming at the small particle materials, and discharging the small particle materials from a discharge hole under the flow impact force of falling liquid; as expansion, the small granular materials are output through a discharging output mesh belt, and liquid obtained after the small granular materials are separated through the discharging output mesh belt is stored through a discharging water tank; secondly, the circulating pump supplements the liquid into the water sieve box body; when the discharge valve is blocked, the liquid feeding nozzle is started to carry out water flow impact on the small particle materials deposited above the liquid feeding nozzle;

step two, firstly, starting a feeding-out component, and outputting large-particle materials output by a separating screen by the feeding-out component; as an extension, then, falls onto the separation output conveyor belt through the separation output guide plate; secondly, the large-particle materials are output to the main machine of the grinding machine to be ground again by the separation output conveyor belt; and thirdly, feeding the ground large-particle materials into a feeding part.

The invention realizes separation according to different abrasive particle sizes, and the particle sizes are different, so that the separation by material density is not reasonable or motivated because the particles are all larger than water.

The invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use. The invention avoids dust raising, reduces energy consumption, avoids hard collision and hard contact of particles and the mesh screen, and reduces abrasion. The technical problem solved by the present invention is not limited to the following: at least a portion of the separating screen and/or at least a portion of the mixing chamber are submerged in the liquid; thereby realize that the particulate matter is soaked, avoid the raise dust, because soak in liquid, avoid forming and hold a group's granule, make the particulate matter obtain fully scattering, utilize the buoyancy of water simultaneously, thereby realize slowing down the particulate matter whereabouts, thereby realize the vibration of changing, realize fully separating, utilize the buoyancy of water (can be kerosene, inorganic solution or organic solution etc.), vibration drive obtains reducing by a wide margin, reduce drive power, through rivers to mesh reverse impact, avoid the particulate matter to block up the mesh, realize the washing to the particulate matter. The invention omits a preposed drying process and realizes the automatic adjustment of the liquid level. The automatic output of falling fine materials is realized through water flow, the efficiency is improved, the circulating work is realized, the dry friction with the screen is wet friction, and the falling speed reduction of the material speed is realized by using water. The technical problem that how to simply and efficiently realize water abrasive separation is difficult to solve in the field is that the traditional high-frequency sieve and rotary sieve are particularly wasted in abrasive and high in cost, but the ideal effect cannot be achieved, and the water spraying effect on the sieve is not ideal. The invention has low cost, energy saving and good separation effect, and simultaneously, the invention realizes the buffer and shock absorption and the noise absorption by utilizing the vibration in water and the liquid, thereby avoiding or reducing the transmission of the vibration and the noise to the outside, improving the service life and the body health of an operator and reducing the abrasion.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of a preferred structure of the present invention.

Fig. 3 is a schematic diagram of a further preferred structure of the present invention.

Fig. 4 is a schematic structural view of a variation of the present invention.

Fig. 5 is a schematic structural view of a further variation of the present invention.

Fig. 6 is a schematic structural view of a re-deformation of the present invention.

Fig. 7 is a schematic view of a further preferred structure of the present invention.

Wherein: 1. Large particle materials; 2. a small particle material; 3. a water screen box body; 4. a blanking box body; 5. a feeding position; 6. separating and screening; 7. a mixing chamber; 8. a support frame; 9. a blanking cavity; 10. a discharge valve; 11. a discharge port; 12. a separation plate; 13. a separation site; 14. separating the elevator; 15. separating the output guide plate; 16. a separate output conveyor; 17. a mill main machine; 18. a discharging output mesh belt; 19. a discharging water tank; 20. a circulation pump; 21. a liquid feeding nozzle; 22. a seat/spring seat; 23. a vibration driving part; 24. a vibrating screen box; 25. separating the auger; 26. liquid level spillway/overflow; 27. a vibration frame; 28. an eccentric shaft.

Detailed Description

As shown in fig. 1 to 7, the solutions in the embodiments of the present invention can be combined and used reasonably. The water abrasive granularity-based separation device comprises a water screen box body 3 which is an assembly, the shape of the water screen box body can be reasonably changed according to actual use, a blanking box body 4 is arranged at the upper end of the water screen box body 3 and communicated with the lower end of the water screen box body 3, and can be used as a part of the water screen box body 3 for convenience of description, so that the structure is simplified, a separation screen 6 arranged in the water screen box body 3 is used for separating particles, and a feeding part 5 which is arranged on the water screen box body 3 and used for feeding large-particle materials 1 (which are the assembly and can be a plurality of types of particles) and small-particle materials 2; thereby feeding the material particles to be separated.

The aperture of the separating screen 6 is larger than the outer diameter of the small particle material 2 and smaller than the outer diameter of the large particle material 1; thereby realizing the separation of material particles.

The separating screen 6 at least divides the inner cavity of the blanking box body 4 into a mixing cavity 7 and a blanking cavity 9; the mixture is stored in a mixing cavity 7, and the small-particle materials 2 enter a blanking cavity 9 through vibration; large particle material 1 remains in the mixing chamber 7. Shaking and shaking are different names of vibration. The mixing chamber 7 can be sealed at the upper end or provided with an opening;

the mixing cavity 7 is communicated with the feeding part 5 to realize feeding, and the blanking cavity 9 is communicated with the blanking box body 4; and the output of small-particle materials is realized.

At least a part of the separating screen 6 and/or at least a part of the mixing chamber 7 is immersed in the liquid; thereby realize that the particulate matter is soaked, avoid the raise dust, because soak in liquid, avoid forming and hold a group's granule, make the particulate matter obtain fully scattering, utilize the buoyancy of water simultaneously, thereby realize slowing down the particulate matter whereabouts, thereby realize the vibration of changing, realize fully separating, utilize the buoyancy of water (can be kerosene, inorganic solution or organic solution etc.), vibration drive obtains reducing by a wide margin, reduce drive power, through rivers to mesh reverse impact, avoid the particulate matter to block up the mesh, realize the washing to the particulate matter.

The blanking cavity 9 is wholly or partially immersed in liquid; preferably monolithic.

The small-particle materials 2 enter a blanking cavity 9 from a mixing cavity 7 through a separating screen 6; and realizing output.

The density of the small particle material 2 is greater than or equal to the density of the liquid, so that a better separation is achieved.

As at least one of the following, combinations or individual uses may be possible.

a) The separating screen 6 is obliquely arranged in the water screen box body 3; therefore, the vibration is performed in the forward direction, the separation is performed in the forward direction, and the efficiency is improved.

b) The separating screen 6 is a vibrating screen, a fixed screen or a mesh screen; the static sieve can drive the particles to move and separate in the liquid by auxiliary power.

c) A support frame 8 for placing the separating screen 6 is arranged in the water screen box body 3; d) a clamping seat/spring seat 22 for installing in the water screen box body 3 is arranged on the separating screen 6; the separation screen 6 can be detachably mounted. The spring holder sets up through the vibration, can realize the shale shaker vibration, and it also can be external deformation such as extension spring.

e) The separating screen 6 comprises a screen plate as shown in fig. 1, a vibrating screen box 24 as shown in fig. 2 or a net bag; the plate type structure has the advantages of convenient structure, convenient cleaning and large mixing space. The vibrating screen net cage 24 (similar to a net cover for spicy soup and northeast cooking) can be separated by utilizing five surfaces or a plurality of surfaces, so that the efficiency is high, and the separation is sufficient.

f) The mixing cavity 7 is positioned above the blanking cavity 9, so that the falling and the separation are conveniently carried out by utilizing the dead weight.

One end of the mixing cavity 7 is connected with a separation part 13, and the separation part 13 is provided with an output end of a separation sieve; thereby realizing that the large-particle materials stored are continuously output. The mixing chamber 7 and the separation portion 13 may be integral or separate, and are for convenience of description herein, so that they are distinguished.

From the feeding part 5 to the separation part 13, the separating screen 6 is obliquely arranged, so that large-particle objects can be better output, and the separation efficiency is improved.

One end of the mixing cavity 7 is communicated with a separation part 13, and a sending-out component input end is arranged in the separation part 13 and is used for receiving materials output by the separation sieve and sending the materials out of the mixing cavity 7;

the send-out assembly includes a separation elevator 14, a sand washer structure, a waterwheel structure, a separation auger 25, or a skimmer. Can realize the output of large-particle materials.

Including at least one of the following, which may be used in combination or alone:

a) the output end of the sending-out component is provided with a separation output guide plate 15; and realizing guide output.

b) A separating plate 12 or a separating net is arranged between the separating part 13 and the blanking cavity 9, a part of the box body or a part of the separating sieve can be used as isolation, and the separating plate 12 or the separating net is used for convenience of description, so that the separating plate and the separating net are separately called.

A discharging valve 10 is arranged in the blanking box body 4 and is closed or opened; a discharge hole 11 for outputting the small-particle materials 2 is arranged at the output end of the discharge valve 10; therefore, the small particle materials can be output, and the small particle materials can also be output by adopting a separating elevator 14, a separating screw feeder 25 or a strainer. Likewise, valve outputs may be used at the separation site 13, with equivalent alternatives. A sand washer or paddlewheel configuration is preferred that is robust and durable, as shown in fig. 5.

The small particle materials 2 and the liquid are together or the small particle materials 2 pass through the discharge valve 10, so that the rapid output is realized, and the efficiency is high.

As the optimization of fig. 2, a discharging output mesh belt 18 with the aperture smaller than that of the small particle material 2 is arranged below the discharging port 11, and a discharging water tank 19 is arranged at the lower end of the discharging output mesh belt 18. The separation of liquid from the small particle material 2 is realized.

A circulating pump 20 is arranged on the discharging water tank 19, a liquid feeding nozzle 21 is arranged in the blanking box body 4, and circulating liquid is used for washing the upper part of the valve, so that the defect that the valve cannot be opened due to the fact that materials are accumulated on a valve plate of the valve is avoided; the feed nozzle 21 is connected to the circulation pump 20 or the water tank.

The separating screen 6 is a vibrating screen, and the vibration driving part 23 of the vibrating screen comprises a cam, a vibrating motor, a crankshaft connecting rod, a vibrating spring or a four-bar mechanism and other conventional technologies.

The water grinding material system of the embodiment comprises a water grinding material granularity-based separation device and a mill main machine 17; a separation output conveyor belt 16 is arranged at the output end of a sending-out component of the water-based abrasive particle size separation device, and large-particle materials 1 output by the separation output conveyor belt 16 are output to a feeding part 5 again after passing through a main machine 17 of the mill. Thereby realizing the re-crushing of the large-particle materials 1. The separating screen 6 is installed with a clamping seat/spring seat 22 through a supporting frame 8;

when the invention is used, large particle materials 1 and small particle materials 2 enter a mixing cavity 7 from a feeding part 5 and are soaked by liquid, and under the action of a separating screen 6 part in the liquid:

the small-particle materials 2 enter a blanking cavity 9; the discharge valve 10 is opened, under the action of liquid, the small-particle material 2 is output and is output through the discharge output mesh belt 18, the liquid enters the discharge water tank 19 and returns to the water screen box body 3 through the circulating pump 20,

when the valve is blocked, the upper part of the valve is impacted by the liquid feeding nozzle 21, so that the particles are stirred and floated.

Under the action of oblique vibration, large-particle materials 1 come to a separation part 13, namely the output end of the separation sieve, and are output through a separation elevator 14 or a separation auger 25, wherein the separation elevator 14 can be vertically lifted, as shown in fig. 1, and the separation auger 25 can be transversely obliquely arranged relative to the separation sieve 6, as shown in fig. 2. And the separation output guide plate 15 guides and outputs the output particles onto a separation output conveyor belt 16, and the particles are ground again by a grinder main machine 17 and return to the feeding part 5.

A liquid level overflow hole/overflow pipe 26 for controlling the water level line is arranged on the water screen box body 3;

as an embodiment, the feed liquor volume that can water sieve box 3 is greater than or equal to water sieve box 3 water yield, thereby can realize the circulation that flows, the frequent opening and shutting of valve member has been saved, avoid the dead drawback of valve card, unnecessary liquid is discharged through liquid level spillway hole/overflow pipe 26 of setting for the height, thereby avoid excessive, because material density is greater than sealed and sinking of water, as long as the water is enough dark, consequently big granule material can not be arranged outward at liquid level spillway hole/overflow pipe 26, some light impurity also can be discharged through the spillway hole simultaneously, and realize liquid level height through it and adjust.

As shown in fig. 7, a vibration frame 27 is connected to the separating screen 6, and the vibration frame 27 is connected to a driving power source through an eccentric shaft 28; realize exporting large granule material through the waterwheel structure.

A vibrating frame 27 is connected to the separating screen 6, a vibrating spring is arranged on the vibrating frame 27, and the vibrating spring is connected with a rack assembly as a support; the vibrating screen and the bottom surface of the blanking cavity 9 are both obliquely arranged, so that blanking is convenient.

As shown in fig. 7, as an optimization, the slope is used to realize the automatic material output, then large granular materials are continuously discharged through a separation elevator 14 (a circulating working structure such as a waterwheel, etc.), small granular materials can be discharged only by opening a discharge valve 10, a separating sieve 6 of the separating sieve adopts an inclined and suspended structure, so that the disassembly and the assembly are convenient, a vibration part is positioned outside a water sieve box body 3, the vibration is realized through a spring or an eccentric shaft, and a positioning groove or a positioning block matched with a positioning block or a positioning groove of the separating sieve 6 is designed in the water sieve box body 3, so that the rapid positioning can be realized.

As shown in fig. 1 to 4, the method for separating water mill materials based on particle size of the present embodiment comprises the following steps; the premise is that at least one part of the separation sieve 6 and/or at least one part of the mixing cavity 7 are immersed in the pre-stored liquid level of the water sieve box body 3 and the blanking box body 4, and the water level of the water sieve box body 3 is controlled through a plurality of liquid level overflow holes or overflow pipes 26 to realize water level adjustment;

firstly, feeding a large-particle material 1 and a small-particle material 2 into a mixing cavity 7 through a feeding part 5, so that liquid at least partially soaks the large-particle material 1 and the small-particle material 2; then, starting the separating screen 6 in an inclined or horizontal state to enable the large-particle materials 1 and the small-particle materials 2 to move forwards in the vibration process on the separating screen 6;

step two, in the process of moving forward on the separating screen 6 in a vibrating manner, the small particle materials 2 fall to the blanking cavity 9, and the large particle materials 1 move forward to the output end of the separating screen 6;

step three, firstly, opening a discharge valve 10 aiming at the small particle materials 2, and discharging the small particle materials 2 from a discharge hole 11 under the flow impact force of falling liquid; as an improvement, the small particle materials 2 are output through a discharging output mesh belt 18, and liquid obtained after the small particle materials 2 are separated through the discharging output mesh belt 18 is stored through a discharging water tank 19; secondly, the circulating pump 20 supplements the liquid into the water screen box 3; when the discharge valve 10 is blocked, the liquid feeding nozzle 21 is started to carry out water flow impact on the small particle materials 2 stored above the liquid feeding nozzle;

step two, firstly, starting the sending-out component, and outputting the large-particle materials 1 output by the separating screen 6 by the sending-out component; then, it falls down onto the separation output conveyor 16 through the separation output guide plate 15; as an improvement, secondly, the separation output conveyor belt 16 outputs the large-particle materials 1 to the main grinder 17 for grinding again; again, the ground large particle material 1 is fed into the feed point 5.

The present invention has been fully described for a clear disclosure and is not to be considered as an exemplification of the prior art.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a separation device of water abrasive based on granularity which characterized in that: comprises a water sieve box body (3), a blanking box body (4) with the upper end communicated with the lower end of the water sieve box body (3), a separating sieve (6) arranged in the water sieve box body (3), and a feeding part (5) which is arranged on the water sieve box body (3) and is used for feeding large granular materials (1) and small granular materials (2);

the aperture of the separating screen (6) is larger than the outer diameter of the small particle material (2) and smaller than the outer diameter of the large particle material (1);

the separating screen (6) at least divides the inner cavity of the blanking box body (4) into a mixing cavity (7) and a blanking cavity (9);

the mixing cavity (7) is communicated with the feeding part (5), and the blanking cavity (9) is communicated with the blanking box body (4);

at least a part of the separating screen (6) and/or at least a part of the mixing chamber (7) is immersed in the liquid;

the blanking cavity (9) is wholly or partially immersed in liquid;

the small-particle materials (2) enter the blanking cavity (9) from the mixing cavity (7) through the separating screen (6).

2. The water abrasive grain-based separation device of claim 1, which is characterized by comprising at least one of the following schemes:

a) the separating screen (6) is obliquely arranged in the water screen box body (3);

b) the separating screen (6) is a vibrating screen, a fixed screen or a mesh screen;

c) a support frame (8) for placing the separating screen (6) is arranged in the water screen box body (3);

d) a clamping seat/spring seat (22) which is used for being arranged in the water screen box body (3) is arranged on the separating screen (6);

e) the separating screen (6) comprises a screen plate, a vibrating screen net cage (24) or a net bag;

f) the mixing cavity (7) is positioned above the blanking cavity (9);

g) the density of the small particle materials (2) is more than or equal to the density of the liquid;

h) the separating screen (6) is a vibrating screen, and a vibration driving part (23) of the vibrating screen comprises a cam, a vibrating motor, a crankshaft connecting rod, a vibrating spring or a four-bar mechanism;

j) the separating screen (6) is connected with a vibrating frame (27), and the vibrating frame (27) is connected with a driving power source through an eccentric shaft (28);

k) a vibrating frame (27) is connected to the separating screen (6), a vibrating spring is arranged on the vibrating frame (27), and the vibrating spring is connected with a rack assembly as a support;

m) the bottom surface of the blanking cavity (9) is obliquely arranged and/or the water outlet is positioned at the lowest point.

3. The water abrasive grain-based separation device of claim 1, which is characterized by comprising at least one of the following schemes:

a) one end of the mixing cavity (7) is connected with a separation part (13), and the separation part (13) is provided with an output end of the separation sieve (6);

b) the separating screen (6) is arranged obliquely from the feed (5) to the separating point (13);

c) a liquid level overflow hole/overflow pipe (26) for controlling the water level line is arranged on the water screen box body (3);

d) the liquid inlet amount of the water sieve box body (3) is more than or equal to the water outlet amount of the water sieve box body (3).

4. The water abrasive grain-based separation device according to claim 1, characterized in that a separation part (13) is communicated with one end of the mixing cavity (7), and a sending-out component is arranged in the separation part (13)

The sending-out component comprises a separating lifter (14), a separating auger (25), a sand washer structure, a waterwheel structure or a strainer.

5. The water abrasive grain-based separation device of claim 4 is characterized by comprising at least one scheme of the following schemes:

a) the output end of the sending-out component is provided with a separation output guide plate (15);

b) a separating plate (12) or a separating net is arranged between the separating part (13) and the blanking cavity (9).

6. The water grinding material granularity-based separation device according to claim 1, characterized in that a closing or opening discharge valve (10) is arranged in the blanking box body (4); a discharge hole (11) for outputting the small-particle materials (2) is arranged at the output end of the discharge valve (10);

the small particle materials (2) and the liquid are together or the small particle materials (2) pass through a discharge valve (10).

7. The separation device of water mill material based on granularity as claimed in claim 3 is characterized in that a liquid feeding nozzle (21) is arranged in the blanking box body (4).

8. The water-mill material granularity-based separation device as claimed in claim 7, characterized in that a discharge output mesh belt (18) with a pore diameter smaller than that of the small-particle material (2) is arranged below the discharge port (11), and a discharge water tank (19) is arranged at the lower end of the discharge output mesh belt (18); a circulating pump (20) is arranged on the discharging water tank (19);

the liquid feeding nozzle (21) is connected with a circulating pump (20) or a water tank.

9. A water-mill material system, characterized by comprising the water-mill material granularity-based separation device and a mill main machine (17) of any one of claims 1 to 9; the output end of the sending-out component of the water-based abrasive grain separation device is provided with a separation output conveyor belt (16), and large-grain materials (1) output by the separation output conveyor belt (16) are output to a feeding part (5) again after passing through a main machine (17) of the mill.

10. A method for particle size based separation of a watermill feed, characterized by the aid of a watermill feed system according to claim 9, comprising the steps of; the premise is that at least one part of the separation sieve (6) and/or at least one part of the mixing cavity (7) are immersed in the pre-stored liquid level of the water sieve box body (3) and the blanking box body (4), and the water level line of the water sieve box body (3) is controlled through a liquid level overflow hole/overflow pipe (26);

firstly, feeding a large particle material (1) and a small particle material (2) into a mixing cavity (7) through a feeding part (5) so that liquid at least partially soaks the large particle material (1) and the small particle material (2); then, starting the separating screen (6) in an inclined or horizontal state to enable the large-particle materials (1) and the small-particle materials (2) to move forwards in the vibration process on the separating screen (6);

step two, in the process of moving forward on the separating screen (6) in a vibrating mode, the small particle materials (2) fall to a blanking cavity (9), and the large particle materials (1) move forward to the output end of the separating screen (6);

step three, opening a discharge valve (10) aiming at the small particle materials (2), and discharging the small particle materials (2) from a discharge hole (11) under the flow impact force of falling liquid;

and step two, starting the sending-out assembly, and outputting the large-particle materials (1) output by the separating screen (6) through the sending-out assembly.