An abrasive particle cleaning and screening device and method

Abstract

This invention relates to the field of fluid machinery equipment technology, specifically to an abrasive particle cleaning and screening device and method, comprising a mixing unit, a diversion unit, and a screening unit connected in sequence. The mixing unit includes a high-pressure pump and an abrasive tank connected to a mixing chamber. High-speed flowing water output from the high-pressure pump creates negative pressure as it passes through the mixing chamber, drawing the abrasive particles from the tank into the mixing chamber, where they mix with the high-speed flowing water. The resulting mixed jet of abrasive and high-pressure water is then conveyed to the diversion unit. The diversion unit divides the mixed jet, ensuring it is evenly distributed and conveyed to the screening unit. The screening unit includes a first screen and a second screen, with the aperture of the first screen being larger than that of the second screen. The mixed jet passes sequentially through the first and second screens, and under the oscillation action of the mixed jet, the first and second screens vibrate uniformly, achieving cleaning of the abrasive. It can simultaneously clean and screen the abrasive.

Description

Technical Field

[0001] This invention relates to the field of fluid machinery equipment technology, specifically to an abrasive particle cleaning and screening device and method. Background Technology

[0002] Abrasive waterjet technology is widely used in surface treatment and cutting processes of difficult-to-machine materials. Compared to pure waterjet, the cutting process requires the addition and consumption of a large number of abrasive particles. Practice shows that after abrasive waterjet cutting, the used abrasive particles retain good edge sharpness and can be reused. However, the used abrasive particles, mixed with the cutting target material and settled mud, sand, and oil, cannot be directly recycled and require cleaning and screening.

[0003] Abrasive particle size is one of the most important abrasive parameters. Commonly used waterjet abrasives have a particle size range of 0.4~0.8mm, and some scholars have studied the sieving of abrasive particle size. For example, patent CN202121958965 discloses a ceramic abrasive screening device that uses a double-layer screen and a vibrating motor to sieve abrasive particles. This device cannot achieve continuous feeding, resulting in low efficiency. Due to the large volume of abrasive used, continuous and uniform feeding and sieving are crucial issues in the screening process. Patent CN202122016563 uses a multi-layer belt design and changes in the tilt angle to control the feeding speed, achieving continuous screening. However, this device has a relatively complex mechanical structure. Furthermore, existing patents are all applicable to dry sieving of abrasives used in airjet blasting machines. Waterjet abrasives often have mud, sand, and oil residue after use, making them unsuitable for direct dry sieving, and cleaning the abrasive requires significant effort. Summary of the Invention

[0004] The purpose of this invention is to provide an abrasive particle cleaning and screening device and method that can simultaneously clean and screen abrasive particles.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention discloses an abrasive particle cleaning and screening device, comprising a mixing unit, a diversion unit, and a screening unit connected in sequence. The mixing unit includes a high-pressure pump and an abrasive tank connected to a mixing chamber. The high-speed flowing water output by the high-pressure pump forms a negative pressure when passing through the mixing chamber, causing the abrasive to be treated to be drawn from the abrasive tank into the mixing chamber and mixed with the high-speed flowing water. The mixed jet formed by the abrasive and the high-pressure water is then transported to the diversion unit. The diversion unit diverts the mixed jet formed by the abrasive and the high-pressure water, so that the mixed jet is evenly distributed and transported to the screening unit. The screening unit includes a first screen and a second screen. The aperture of the first screen is larger than that of the second screen. The mixed jet passes through the first screen and the second screen in sequence. Under the oscillation action of the mixed jet, the first screen and the second screen vibrate and screen evenly, thereby achieving the cleaning of the abrasive.

[0007] By adopting the above technical solution, high-speed flowing water is used to draw abrasive into the mixing chamber for mixing. The mixing process achieves the first cleaning of the abrasive. Then, the mixed jet is conveyed to the distribution unit, which distributes the mixed jet evenly to the screening unit. Under the action of the high-velocity mixed jet, the first screen generates uniform mechanical vibration, achieving the second cleaning of the abrasive. Large particles are filtered by the first screen, while abrasive particles and tiny particles fall onto the second screen. At this point, abrasive particles cannot pass through the second screen, while tiny particles fall through the second screen and are discharged.

[0008] Furthermore, the flow splitting unit includes a housing and a dendritic flow channel disposed within the housing. The upper part of the housing is connected to the lower part of the mixing chamber via a connector. The opening of the dendritic flow channel is connected to the outlet of the mixing chamber. The number of dendritic flow channel outlets is even, and the even number of dendritic flow channel outlets are symmetrically arranged along the outlet direction of the mixing chamber.

[0009] By adopting the above technical solution, when the high-speed flowing mixed jet is ejected through the symmetrically arranged dendritic flow channel outlet, it generates a counter-thrust torque in the same direction, which drives the diversion unit to rotate, thus eliminating the need for a separate rotating mechanism and making the structure of the abrasive particle cleaning and screening device simpler.

[0010] Furthermore, the housing includes a first section, several second sections extending obliquely downward from the lower end of the first section, and a third section extending downward from the lower end of the second sections. The upper outer wall of the first section is rotatably connected to the lower part of the inner wall of the connector. The first section has a first through hole that penetrates axially. The several second sections are evenly distributed around the first section. The second sections have second through holes that penetrate axially and communicate with the first through hole. The third section has a third through hole that penetrates axially and communicates with the second through hole. The two outlets of the third through hole are symmetrically bifurcated.

[0011] By adopting the above technical solution, the first through hole, the second through hole and the third through hole are connected to form a dendritic flow channel, which has a simple structure and is easy to manufacture.

[0012] Furthermore, the second segment consists of four segments.

[0013] By adopting the above technical solution, it is ensured that the mixed jet can be uniformly sprayed into the screening unit, avoiding uneven distribution that leads to abrasive accumulation and improving the cleaning and screening efficiency of abrasive.

[0014] Furthermore, the internal flow channel of the mixing chamber includes a first convergent section, a first acceleration section, a mixing section, a second convergent section, and a second acceleration section connected in sequence. Both the first and second convergent sections are converging conical in shape. The large-diameter end of the first convergent section is connected to the output end of the high-pressure pump through a pipeline, and the small-diameter end of the first convergent section is connected to the cylindrical inlet of the first acceleration section. The side wall of the mixing chamber is provided with a radial hole that communicates with the mixing section and is connected to the abrasive tank. The large-diameter end of the second convergent section is connected to the outlet of the mixing section, and the small-diameter end of the second convergent section is connected to the cylindrical inlet of the second acceleration section.

[0015] By adopting the above technical solution, the first convergence section and the first acceleration section are used to achieve the first acceleration of the water jet. When the high-pressure water enters the mixing chamber, a negative pressure is formed inside the mixing chamber to mix the abrasive and water, accelerate the abrasive particles, and form a fully mixed abrasive and water mixture, i.e., a mixed jet.

[0016] Furthermore, the first and second screens are arranged vertically at intervals within the box, and the mixing chamber is connected to the top of the box with its outlet extending into the interior of the box.

[0017] By adopting the above technical solution, the enclosure serves as an isolation and protection mechanism to prevent the mixed jet from flowing out.

[0018] Furthermore, steel rings are fixed to the inner wall of the box at positions corresponding to the first and second screens, and the edges of the first and second screens are connected to the steel rings by springs.

[0019] By adopting the above technical solution, the first and second screens have a certain elastic deformation capability. When the mixed jet is sprayed onto the first and second screens, mechanical vibration can be generated under the action of the high-speed flowing mixed jet, thereby improving the cleaning and screening effect of the abrasive.

[0020] Furthermore, an anchor bolt is fixed to the left side of the steel ring, and a rotating handle is fixed to the right side of the steel ring at a position symmetrical to the anchor bolt; a limit bolt is fixed to the front side of the steel ring, and a limiter is fixed to the rear side of the steel ring at a position symmetrical to the limit bolt.

[0021] By adopting the above technical solution, after the abrasive cleaning is completed, the limiter can be opened and the rotating handle can be turned to realize the rotation of the first screen and the second screen, which facilitates the collection of abrasive on the first screen and the cleaning of impurities on the second screen.

[0022] Secondly, the present invention discloses a method for cleaning and screening abrasive particles, which uses the aforementioned abrasive particle cleaning and screening device to clean and screen the abrasive particles to be processed, specifically including the following steps:

[0023] S1, the abrasive to be treated is placed in the abrasive tank. The high-speed water output by the high-pressure pump forms a negative pressure when it passes through the mixing chamber, which causes the abrasive to be treated to be drawn from the abrasive tank into the mixing chamber and mixed with the high-speed water in the mixing chamber. The mixing process achieves the first cleaning of the abrasive to be treated.

[0024] S2, the mixed jet formed by the abrasive and high-pressure water is conveyed to the diversion unit. The diversion unit divides the mixed jet formed by the abrasive and high-pressure water, so that the mixed jet is evenly distributed and conveyed to the screening unit. The screening unit realizes the screening and secondary cleaning of the abrasive to be treated.

[0025] The beneficial effects of this invention are:

[0026] This invention achieves uniform and continuous feeding of abrasives through a self-priming abrasive mixing chamber, and uniform sieving of the abrasive-impurity mixture through a diversion unit and a sieving unit. The symmetrical impact of the mixing jet on the first screen generates uniform oscillation, improving sieving efficiency, preventing screen clogging, enabling continuous operation, and facilitating centrifugal separation of abrasive particles and impurities. The mixing jet simultaneously cleans the abrasive and removes impurities. Furthermore, it features a simple structure, convenient operation, and is economical and practical. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the abrasive particle cleaning and screening device described in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram showing the connection between the diversion unit and the screening unit in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the current splitting unit described in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the tangential angles of the inner and outer eccentric holes of the flow splitting unit described in this embodiment of the invention;

[0031] Figure 5 This is a schematic diagram of the structure of the screening unit described in an embodiment of the present invention.

[0032] In the diagram, 1—water tank, 2—high-pressure pump, 3—mixing chamber, 31—first convergence section, 32—first acceleration section, 33—radial hole, 34—mixing section, 35—second convergence section, 36—second acceleration section, 4—abrasive container, 5—abrasive to be processed, 6—connector, 7—diverter unit, 71—first section, 72—second section, 73—third section, 74—inner eccentric hole, 741—first inner eccentric hole, 742—second inner eccentric hole Hole, 743—Third inner eccentric hole, 744—Fourth inner eccentric hole, 75—Outer eccentric hole, 751—First outer eccentric hole, 752—Second outer eccentric hole, 753—Third outer eccentric hole, 754—Fourth outer eccentric hole, 8—Box body, 9—First screen, 10—Second screen, 11—Spring, 12—Anchor bolt, 13—Rotating handle, 14—Slag outlet, 15—Residue chamber, 16—Limit bolt, 17—Limiter. Detailed Implementation

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] After use, the abrasive particles, mixed with the cutting target material and settled mud, sand, and oil, cannot be directly recycled and require cleaning and screening. Used waterjet abrasive often has mud, sand, and oil adhering to it, making direct dry screening impossible; it must first be cleaned before dry screening, which is labor-intensive. This invention addresses this problem by using a self-priming abrasive mixing chamber to achieve uniform and continuous feeding of the abrasive, and a diversion and screening unit to achieve uniform screening of the abrasive-impurity mixture. The symmetrical impact of the mixing jet on the first screen generates uniform oscillation, improving screening efficiency, preventing clogging of the first screen, enabling continuous operation, and facilitating the centrifugal separation of abrasive particles and impurities. Under the scouring of the mixing jet, both the abrasive and impurities are cleaned simultaneously. Furthermore, it has a simple structure, is easy to operate, and is economical and practical.

[0036] Example 1, as Figure 1As shown, an abrasive particle cleaning and screening device of the present invention includes a mixing unit, a diversion unit, and a screening unit connected in sequence. The mixing unit includes a high-pressure pump 2 and an abrasive tank 4 connected to a mixing chamber 3. The input end of the high-pressure pump 2 is connected to a water tank 1. The high-speed flowing water output by the high-pressure pump 2 forms a negative pressure when passing through the mixing chamber 3, causing the abrasive particles 5 to be treated to be drawn from the abrasive tank 4 into the mixing chamber 3 and mixed with the high-speed flowing water in the mixing chamber 3. The mixed jet formed by the abrasive particles and high-pressure water is conveyed to the diversion unit. The diversion unit diverts the mixed jet formed by the abrasive particles and high-pressure water, so that the mixed jet is evenly distributed and conveyed to the screening unit. The screening unit includes a first screen 9 and a second screen 10. The aperture of the first screen 9 is larger than that of the second screen 10. The mixed jet passes through the first screen 9 and the second screen 10 in sequence. Under the oscillation action of the mixed jet, the first screen 9 and the second screen 10 vibrate and screen evenly, thereby cleaning the abrasive particles.

[0037] This invention utilizes high-speed water flow from a high-pressure pump 2 to draw the abrasive material 5 from the abrasive tank 4 into a mixing chamber 3 for mixing. This mixing process achieves the first cleaning of the abrasive material 5. The mixed jet is then conveyed to a distribution unit, which distributes it evenly to a screening unit. Under the action of the high-velocity mixed jet, the first screen 9 generates uniform mechanical vibration, achieving a secondary cleaning of the abrasive. Large particles are filtered by the first screen 9, while abrasive particles and small particles fall onto the second screen 10. Because the aperture of the second screen 10 is smaller than that of the first screen 9, the abrasive particles cannot pass through the second screen 10, while the small particles fall through and are discharged. This invention allows for simultaneous cleaning and screening, significantly reducing the workload of abrasive cleaning. Furthermore, the entire device is simple in structure, easy to operate, and economical.

[0038] like Figure 2 As shown, in this embodiment, the diversion unit includes a housing and a dendritic flow channel disposed within the housing. The upper outer side of the housing is connected to the lower part of the mixing chamber 3 via a connector 6. The upper part of the connector 6 is provided with a mounting hole that is threadedly connected to the lower outer side of the mixing chamber 3. The lower inner side of the connector 6 is connected to the upper outer side of the mixing chamber 3 via a friction rotating ring, allowing the mixing chamber 3 to rotate axially relative to the connector 6, thereby enabling better uniform spraying of the mixed jet onto the first screen 9 of the screening unit. The opening of the dendritic flow channel of the diversion unit is connected to the outlet of the mixing chamber. There are four dendritic flow channel outlets, which are uniformly and symmetrically arranged along the direction of the mixing chamber outlet to avoid uneven distribution leading to abrasive accumulation and improve the cleaning and screening efficiency of the abrasive. By adopting the above technical solution, when the high-speed flowing mixed jet is sprayed through the symmetrically arranged dendritic flow channel outlets, it generates a counter-thrust torque in the same direction, driving the diversion unit to rotate, thus eliminating the need for a separate rotating mechanism and making the structure of the abrasive particle cleaning and screening device simpler.

[0039] like Figure 2 As shown, in this embodiment, the housing includes a first segment 71, four second segments 72 extending obliquely downward from the lower end of the first segment 71, and a third segment 73 extending downward from the lower end of the second segments 72. The upper outer wall of the first segment 71 is rotatably connected to the lower part of the inner wall of the connector 6. The first segment 71 has an axially penetrating first through hole. The four second segments 72 are evenly distributed circumferentially along the first segment 71. Each second segment 72 has an axially penetrating second through hole communicating with the first through hole. The third segment 73 has an axially penetrating third through hole communicating with the second through hole. The two outlets of the third through hole are symmetrically bifurcated. Figure 2 , Figure 3 and Figure 4 As shown, the third through hole includes an inner eccentric hole 74 and an outer eccentric hole 75. The first through hole, the second through hole, and the third through hole are connected to form a dendritic flow channel, which has a simple structure and is easy to manufacture.

[0040] like Figure 3 and Figure 4 As shown, the tangential angle of the spin of the inner eccentric hole 74 is -20°, and the tangential angle of the spin of the outer eccentric hole is 30°. The inclination angle of the axes of the first inner eccentric hole 741 and the third inner eccentric hole 743 relative to the vertical line is 70°, and the inclination angle of the axes of the second inner eccentric hole 742 and the fourth inner eccentric hole 744 relative to the vertical line is 80°. The inclination angle of the axes of the first outer eccentric hole 751 and the third outer eccentric hole 753 relative to the vertical line is 65°, and the inclination angle of the axes of the second outer eccentric hole 752 and the fourth outer eccentric hole 754 relative to the vertical line is 75°. Figure 3 As shown, the spraying directions of the inner and outer eccentric holes correspond to different radius positions of the first screen 9. At the same time, the mixed jet rotates with the flow splitting unit 7, ensuring the uniform distribution of abrasive on the first screen 9.

[0041] like Figure 2As shown, in this embodiment, the internal flow channel of the mixing chamber 3 includes a first converging section 31, a first accelerating section 32, a mixing section 34, a second converging section 35, and a second accelerating section 36 connected in sequence. Both the first converging section 31 and the second converging section 35 are converging conical in shape. The large-diameter end of the first converging section 31 is connected to the output end of the high-pressure pump 2 via a pipeline, and the small-diameter end of the first converging section 31 is connected to the inlet of the cylindrical first accelerating section 32. A radial hole 33 communicating with the mixing section 34 is provided on the side wall of the mixing chamber 3, and this radial hole 33 is connected to the abrasive tank 4. The large-diameter end of the second converging section 35 is connected to the outlet of the mixing section 34, and the small-diameter end of the second converging section 35 is connected to the inlet of the cylindrical second accelerating section 36. The water jet is initially accelerated using the first convergence section 31 and the first acceleration section 32. When the high-pressure water enters the mixing section 34 of the mixing chamber 3, a negative pressure is created inside the mixing section 34, mixing the abrasive and water, accelerating the abrasive particles, and forming a fully mixed abrasive-water mixture, i.e., a mixed jet. This mixed jet then passes through the second convergence section 35 and the second acceleration section 36 before being discharged to the diversion unit 7.

[0042] like Figure 2 As shown, in this embodiment, the first screen 9 and the second screen 10 are arranged vertically at intervals within the housing 8. The mixing chamber 3 is connected to the top of the housing 8, and the outlet of the mixing chamber 3 extends into the housing 8 through the diversion unit 7. The housing 8 serves as an isolation and protection mechanism to prevent the mixed jet from flowing out.

[0043] like Figure 5 As shown in this embodiment, steel rings are fixed to the inner wall of the housing 8 at positions corresponding to the first screen 9 and the second screen 10. The edges of the first screen 9 and the second screen 10 are connected to the steel rings via springs 11. The use of springs 11 to connect the first screen 9 and the second screen 10 gives them a certain elastic deformation capability. When the mixed jet is sprayed onto the first screen 9 and the second screen 10, mechanical vibration can be generated under the action of the high-speed flowing mixed jet, thereby improving the cleaning and screening effect of the abrasive.

[0044] like Figure 5 As shown, in this embodiment, an anchor bolt 12 is fixed to the left side of the steel ring, and a rotating handle 13 is fixed to the right side of the steel ring at a position symmetrical to the anchor bolt 12. A limit bolt 16 is fixed to the front side of the steel ring, and a limit device 17 is fixed to the rear side of the steel ring at a position symmetrical to the limit bolt 16. After the abrasive cleaning is completed, the limit device 17 is opened, the limit bolt 16 is removed, and the rotating handle 13 is rotated to flip the first screen 9 and the second screen 10, which facilitates the collection of the cleaned and screened abrasive on the first screen 9 and the cleaning of impurities on the second screen 10.

[0045] Secondly, the present invention discloses a method for cleaning and screening abrasive particles, which uses the aforementioned abrasive particle cleaning and screening device to clean and screen the abrasive particles to be processed, specifically including the following steps:

[0046] S1, the abrasive 5 to be treated is placed in the abrasive tank 4. The high-pressure pump 2 is connected to the water tank and outputs high-speed flowing water. When the water passes through the mixing chamber 3, it forms a negative pressure, which causes the abrasive 5 to be treated to be sucked from the abrasive tank 4 into the mixing chamber 3 and mixed with the high-speed flowing water in the mixing chamber 3. The mixing process achieves the first cleaning of the abrasive 5 to be treated.

[0047] S2, the mixed jet formed by the abrasive and high-pressure water is conveyed to the diversion unit 7. The diversion unit 7 divides the mixed jet, ensuring that it is evenly distributed and conveyed to the screening unit. The screening unit then performs screening and secondary cleaning of the abrasive 5 to be treated. The screening unit includes a first screen 9 and a second screen 10. The aperture of the first screen 9 is larger than that of the second screen 10. The mixed jet passes through the first screen 9 and the second screen 10 in sequence. Under the oscillation action of the mixed jet, the first screen 9 and the second screen 10 vibrate and screen evenly, thus cleaning the abrasive.

[0048] Under the action of a high-velocity mixed jet, the first screen 9 generates uniform mechanical oscillation, achieving secondary cleaning of the abrasive. Large particles are filtered by the first screen 9, while abrasive particles and tiny particles fall onto the second screen 10. Since the aperture of the second screen 10 is smaller than that of the first screen 9, the abrasive particles cannot pass through the second screen 10, while the tiny particles fall through and are discharged into the residue chamber 15 through the slag outlet 14 at the lower end of the housing 8. The liquid in the upper part of the residue chamber 15 can also be returned to the water tank 1 for recycling, saving water resources. The cleaning and screening of this invention can be carried out simultaneously, greatly reducing the workload of abrasive cleaning. Furthermore, the entire device has a simple structure, is easy to operate, and is economical and practical.

[0049] After cleaning and screening, remove the residue chamber 15 and place the abrasive collection box at the slag outlet 14 at the lower end of the box 8. Open the limiter 17 on the second screen 10, remove the corresponding limit bolt 16, and rotate the rotating handle 13 on the second screen 10 to flip the second screen 10 180°, allowing the abrasive particles obtained from cleaning and screening on the second screen 10 to fall into the abrasive collection box under gravity, thus collecting the abrasive particles. Then rotate the second screen 10 to a vertical position, open the limiter 17 on the first screen 9, remove the corresponding limit bolt 16, and rotate the rotating handle 13 on the first screen 9 to flip the first screen 9 180°. Turn on the high-pressure pump, and under the impact of the high-pressure water jet, large particles of impurities on the first screen 9 will be removed, thus cleaning the first screen 9. After cleaning, reset the first screen 9 and the second screen 10 in sequence to prepare for the next cleaning and screening.

[0050] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. An abrasive particle cleaning and screening device, characterized in that: It includes a mixing unit, a diversion unit (7) and a screening unit connected in sequence; The mixing unit includes a high-pressure pump (2) and an abrasive tank (4) connected to the mixing chamber (3). The high-speed water output by the high-pressure pump (2) forms a negative pressure when passing through the mixing chamber (3), so that the abrasive to be processed (5) is sucked from the abrasive tank (4) into the mixing chamber (3) and mixed with the high-speed water in the mixing chamber (3). The mixed jet formed by the abrasive and the high-pressure water is transported to the diversion unit (7). The diversion unit (7) diverts the mixed jet formed by the abrasive and high-pressure water, so that the mixed jet is evenly distributed and transported to the screening unit. The screening unit includes a first screen (9) and a second screen (10). The aperture of the first screen (9) is larger than that of the second screen (10). The mixed jet passes through the first screen (9) and the second screen (10) in sequence. Under the oscillation of the mixed jet, the first screen (9) and the second screen (10) vibrate and screen evenly, thereby cleaning the abrasive. The diversion unit (7) includes a housing and a dendritic channel disposed in the housing. The upper part of the housing is connected to the lower part of the mixing chamber (3) through a connector. The opening of the dendritic channel is connected to the outlet of the mixing chamber (3). The number of dendritic channel outlets is even. The even number of dendritic channel outlets are symmetrically arranged along the outlet direction of the mixing chamber (3). The housing includes a first section (71), several second sections (72) extending obliquely downward from the lower end of the first section (71), and a third section (73) extending downward from the lower end of the second section (72). The upper outer wall of the first section (71) is rotatably connected to the lower part of the inner wall of the connector (6). The first section (71) is provided with an axially penetrating first through hole. Several second sections (72) are evenly distributed around the first section. The second sections (72) are provided with an axially penetrating second through hole that communicates with the first through hole. The third section (73) is provided with an axially penetrating third through hole that communicates with the second through hole. The two outlets of the third through hole are symmetrically bifurcated. The third through hole includes an inner eccentric hole (74) and an outer eccentric hole (75).

2. The abrasive particle cleaning and screening device according to claim 1, characterized in that: The second segment (72) has four parts.

3. The abrasive particle cleaning and screening device according to claim 1, characterized in that: The internal flow channel of the mixing chamber (3) includes a first convergent section (31), a first acceleration section (32), a mixing section (34), a second convergent section (35), and a second acceleration section (36) connected in sequence. The first convergent section (31) and the second convergent section (35) are both converging cones. The large-diameter end of the first convergent section (31) is connected to the output end of the high-pressure pump (2) through a pipeline. The small-diameter end of the first convergent section (31) is connected to the inlet of the cylindrical first acceleration section (32). The side wall of the mixing chamber (3) is provided with a radial hole (33) that communicates with the mixing section (34). The radial hole (33) is connected to the abrasive tank (4). The large-diameter end of the second convergence section (35) is connected to the outlet of the mixing section (34), and the small-diameter end of the second convergence section (35) is connected to the inlet of the cylindrical second acceleration section (36).

4. The abrasive particle cleaning and screening device according to claim 1, characterized in that: The first screen (9) and the second screen (10) are arranged vertically and horizontally in the box (8), and the mixing chamber (3) is connected to the top of the box (8) and the outlet of the mixing chamber (3) extends into the inside of the box (8).

5. The abrasive particle cleaning and screening device according to claim 4, characterized in that: The inner wall of the box (8) is fixed with steel rings at positions corresponding to the first screen (9) and the second screen (10). The edges of the first screen (9) and the second screen (10) are connected to the steel rings by springs (11).

6. The abrasive particle cleaning and screening device according to claim 5, characterized in that: An anchor bolt (12) is fixed on the left side of the steel ring, and a rotating handle (13) is fixed on the right side of the steel ring at a position symmetrical to the anchor bolt (12). A limit bolt (16) is fixed on the front side of the steel ring, and a limiter (17) is fixed on the rear side of the steel ring at a position symmetrical to the limit bolt (16).

7. A method for cleaning and screening abrasive particles, characterized in that: The abrasive particle cleaning and screening device according to any one of claims 1 to 6 is used to clean and screen the abrasive particles to be treated, specifically including the following steps: S1, the abrasive (5) to be treated is placed in the abrasive tank (4). The high-speed water output by the high-pressure pump (2) forms a negative pressure when passing through the mixing chamber (3), so that the abrasive (5) to be treated is sucked from the abrasive tank (4) into the mixing chamber (3) and mixed with the high-speed water in the mixing chamber. The mixing process achieves the first cleaning of the abrasive (5) to be treated. S2, the mixed jet formed by the abrasive and high-pressure water is transported to the diversion unit (7). The diversion unit (7) diverts the mixed jet formed by the abrasive and high-pressure water, so that the mixed jet is evenly distributed and transported to the screening unit. The screening unit realizes the screening and secondary cleaning of the abrasive to be treated.

Images