A large volume solid pre-crushing assembly for a slurry pump water inlet and a method of use thereof

Abstract

The present invention relates to the technical field of solid pre-crushing components. The application discloses a large-volume solid pre-crushing component for a slurry pump water inlet and a method of using the component, including a crushing box, wherein a crushing roller is rotatably connected to the inside of the crushing box via a bearing, a protective cover is fixed to the side of the crushing box, a driving motor is arranged on the side of the protective cover away from the crushing box, and the ends of the two crushing rollers rotate and penetrate into the inside of the protective cover. The present invention screens solids that reach the crushing volume through pre-screening and diverting, and retains them in the pre-screening treatment box, and then pushes them into the crushing box through water flow and a cleaning scraper, so that large-volume solids can be crushed without affecting suction, thereby solving the problem that the existing large-volume solid pre-crushing component for the water inlet of a slurry pump easily hinders the pumping of the slurry pump during crushing, and ensures that the pre-crushing device can timely and comprehensively crush large-volume solids while ensuring the pumping effect of the slurry pump.

Description

Technical Field

[0001] The present invention relates to the technical field of solid pre-crushing components, and in particular to a large-volume solid pre-crushing component for a slurry pump water inlet and a use method thereof. Background Art

[0002] A slurry pump is a machine that increases the energy of a solid-liquid mixed medium by the action of centrifugal force, and converts electrical energy into kinetic energy and potential energy of the medium. It is mainly suitable for industries such as mining, power plants, dredging, metallurgy, chemicals, building materials and petroleum. In mines, it is often used to transport a mixture of solid particles such as ore and slag and water. When the slurry pump is extracting the mixture, a fixed pre-crushing component is set at the water inlet of the slurry pump to avoid large volumes of solids entering the slurry pump and causing blockage or damage to the impeller.

[0003] The crushing component at the water inlet of the slurry pump will crush the large volume and then discharge it to the water inlet of the slurry pump, and enter the interior of the slurry pump together with the water flow. However, since the crushing component is located at the water inlet of the slurry pump, it will block the water inlet and affect the suction force during extraction. Moreover, when filtering after crushing, under the negative pressure during extraction, the incompletely crushed solids will be adsorbed on the filter screen, causing the filter screen to be blocked, which is more likely to cause blockage, resulting in a significant reduction in the extraction force of the slurry pump. Summary of the invention

[0004] In order to solve the problem that the existing large-volume solid pre-crushing assembly for the water inlet of a slurry pump easily hinders the slurry pump from pumping water during crushing, the present invention provides a large-volume solid pre-crushing assembly for the water inlet of a slurry pump and a method of use to solve the above problem.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A large-volume solid pre-crushing assembly for a slurry pump water inlet and a use method thereof, comprising a crushing box, wherein a crushing roller is rotatably connected to the crushing box via a bearing, a protective cover is fixed to the side of the crushing box, a driving motor is arranged on the side of the protective cover away from the crushing box, two ends of the crushing rollers are rotated to penetrate into the protective cover, gears are fixed to the two ends of the crushing rollers in the protective cover, and the two gears are meshed and connected, and an output rod of the driving motor is rotated to penetrate into the protective cover and fixed to one of the ends of the crushing rollers;

[0007] A connecting pipe is fixed through the bottom of the crushing box, a pre-screening box is fixed through the end of the connecting pipe away from the crushing box, a drainage pipe is fixed through the top of the pre-screening box on the side of the connecting pipe, a water inlet pipe is fixed through the bottom of the pre-screening box below the drainage pipe, a supporting partition frame is fixed inside the pre-screening box below the drainage pipe for separating the connecting pipe and the interior of the pre-screening box below the drainage pipe, a filter screen 1 is detachably fixed on the bottom surface of the supporting partition frame, a scraper assembly is provided inside the pre-screening box on the bottom surface of the filter screen 1, a filter pipe is fixed through the top of the crushing box, and one end of the filter pipe away from the crushing box is connected to the drainage pipe.

[0008] Furthermore, the bottom of the crushing box and the top of the pre-screening box are both provided with through holes that cooperate with the connecting pipe and the drain pipe. The end of the water inlet pipe away from the pre-screening box is configured to be trumpet-shaped, and the inner diameter of the water inlet pipe is equal to the inner diameter of the drain pipe.

[0009] Furthermore, the supporting partition frame is configured to be L-shaped and cooperate with the through hole at the bottom of the drain pipe. A through groove cooperating with the through hole is provided at the bottom of the supporting partition frame. A fixed mesh frame is detachably fixed to the bottom of the supporting partition frame by bolts. The fixed mesh frame is configured to be a rectangle cooperating with the bottom of the supporting partition frame. A filter mesh 1 is fixed inside the fixed mesh frame, and the bottom surface of the filter mesh 1 is flush with the bottom surface of the fixed mesh frame.

[0010] Furthermore, the scraper assembly includes a conveying chain and a cleaning scraper. Fixed covers are fixed on the front and rear sides of the pre-screening processing box. The two fixed covers are symmetrically rotatably connected with rotating rods through bearings. A sprocket is fixedly sleeved on each rotating rod. A conveying chain is meshed and sleeved between the two sprockets on each side. A number of connecting rods are equidistantly fixed between the outer sides of the front and rear conveying chains. A cleaning scraper is fixed on the outer side of each conveying chain for scraping large-volume solids on the bottom surface of the filter screen.

[0011] Furthermore, one of the rotating rods passes through the outside of the fixed cover and is fixed with a pulley, and another pulley is fixed to the outer surface of the output rod of the driving motor, and the two pulleys are connected by a transmission belt.

[0012] Furthermore, movable grooves cooperating with connecting rods are provided on the front and rear sides of the pre-screening processing box, and the two movable grooves are both arranged in a runway shape. Each connecting rod is arranged as a cylinder cooperating with the movable groove, and a connecting shaft is fixed between the two rotating rods near the ends of the connecting pipe, and the connecting shaft is located inside the pre-screening processing box below the connecting pipe.

[0013] Furthermore, the length of each of the cleaning scrapers is greater than the length of the filter screen, the height of each of the cleaning scrapers is equal to the distance between the connecting rod and the side of the filter screen, the height of each of the cleaning scrapers is less than the distance between the bottom surface of the conveying chain and the bottom surface of the pre-screening treatment box, and each of the cleaning scrapers is arranged to be inclined away from the connecting rod end toward the end of the connecting pipe.

[0014] Furthermore, the inner diameter of the filter tube is larger than the inner diameter of the connecting tube, a return pipe is fixed through the side of the filter tube, one end of the return pipe away from the filter tube is fixed through the upper part of the water inlet pipe, a filter net 2 is fixed inside the filter tube at the top of the return pipe, and an electric valve is provided at one end of the connecting tube close to the filter tube.

[0015] Furthermore, the mesh size of filter screen 2 is the same as that of filter screen 1, the return pipe is configured as a horizontally placed U-shape that cooperates with the crushing box and the pre-screening treatment box, a check valve is provided at one end of the return pipe close to the water inlet pipe, and a flow meter is provided on the electric valve.

[0016] Furthermore, a method for using a large-volume solid pre-crushing assembly for a slurry pump water inlet comprises the following steps:

[0017] Step A, fix the drain pipe to the water inlet of the slurry pump, turn on the slurry pump to start conveying the slurry;

[0018] Step A1, turning on the slurry pump and the driving motor at the same time, when the slurry pump is running to extract slurry, solid minerals that meet the volume pass through the filter screen and enter the support partition frame, and then enter the drain pipe through the support partition frame, and are sucked into the slurry pump through the drain pipe along with the water flow;

[0019] Step A2, solid minerals that do not meet the volume are retained inside the pre-screening treatment box under the filtration of the filter screen 1, and at this time, the driving motor drives the rotating rod to rotate through the transmission belt, and when the rotating rod rotates, it drives the conveying chain to move, and when the conveying chain moves, it drives the cleaning scraper to move toward the connecting pipe side, and when the cleaning scraper moves, the large volume of fixed minerals adsorbed on the bottom surface of the filter screen 1 due to the negative pressure generated during extraction after filtration are pushed to the bottom of the connecting pipe;

[0020] Step A3: Since the connecting pipe is connected to the inside of the crushing box, and the crushing box is connected to the drain pipe through the filter pipe and the connecting pipe, the crushing box also has a certain negative pressure adsorption force. Under the action of the suction force, the large-volume mineral blocks pushed to the bottom of the connecting pipe are brought into the crushing box with the water flow for crushing;

[0021] Step B, crushing the fixed minerals that do not meet the volume;

[0022] Step B1, after the large-volume mineral block enters the crushing box with the water flow, the driving motor is in operation, driving the gear connected to the protective cover to rotate. When the gear rotates, it drives the other gear meshed with it to rotate relatively, thereby driving the two crushing rollers to rotate relatively. When the two crushing rollers rotate relatively, the mineral is driven into between the two crushing rollers and crushed;

[0023] Step B2, the crushed mineral blocks continue to move into the filter tube under the drive of the water flow, and under the filtration of the second filter screen, the qualified mineral blocks after crushing flow into the drain pipe through the connecting pipe and enter the slurry pump, and the unqualified mineral blocks after crushing remain in the filter tube;

[0024] Step C, reflowing the unqualified mineral blocks for secondary crushing;

[0025] Step C1, when there are many unqualified mineral blocks filtered out from the inside of the filter tube, under the action of the adsorption force at the end of the connecting tube, more of them will be adsorbed on the bottom surface of the second filter screen. When there are many mineral blocks adsorbed on the bottom surface of the second filter screen, the adsorption force inside the filter tube is weakened, and the water flow cannot pass through the second filter screen into the connecting tube, resulting in a decrease in the flow inside the connecting tube;

[0026] Step C2, after the flow rate decreases, the electric valve is closed, and the adsorption force inside the filter tube disappears. Under the action of the adsorption force inside the water inlet pipe, part of the water flow inside the pre-screening treatment box and the crushing box enter the filter tube, and drive the slurry inside the filter tube to flow back, which can drive the unqualified mineral blocks to flow into the water inlet pipe;

[0027] Step C3, under the adsorption of the water inlet pipe, the water re-enters the pre-screening treatment box, and after entering the pre-screening treatment box, the water that fails to pass the screening by the filter screen continues to enter the crushing box for crushing, and the check valve is in a normally open state. When the adsorption force of the connecting pipe on the inside of the filter tube is greater than the adsorption force applied by the water inlet pipe to the end of the filter tube, under the action of the check valve, the water flow will not directly enter the inside of the filter tube through the return pipe;

[0028] Step C4, after the unqualified mineral blocks are returned, the electric valve is opened, and the filter screen 2 can continue to filter, so that the mineral blocks and water flow after crushing and filtering continue to enter the drain pipe through the connecting pipe.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, solids that have reached the crushing volume are screened and retained in the pre-screening treatment box through pre-screening diversion, and then pushed into the crushing box through water flow and cleaning scrapers, so that large-volume solids can be crushed without affecting suction, solving the problem that the existing large-volume solid pre-crushing components used for the water inlet of the slurry pump are prone to hinder the slurry pumping during crushing, ensuring that the pre-crushing device can crush the large-volume solids in a timely and comprehensive manner while ensuring the pumping effect of the slurry pump.

[0031] 2. In the present invention, through the filtering reflux structure after crushing, after the large volume solid is crushed, it is filtered through the filter screen 2, and the particles that meet the volume standard are directly sucked away, and the fixed mineral particles that are still large in volume are screened out, so as to prevent the solid mineral particles that do not meet the crushing standards from flowing into the slurry pump.

[0032] 3. In the present invention, through the reflux pipe on the side of the filter screen, when there are a large number of particles that do not meet the volume standard and accumulate in the filter tube, the filter screen 2 is blocked and the suction force in the filter tube is reduced. At this time, the suction force in the water inlet pipe is greater than the suction force in the filter tube, and the unqualified particles can be drawn back into the crushing box for crushing, thereby ensuring the comprehensiveness of the crushing of the pre-crushing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 is a front view schematic diagram of a pre-crushing assembly structure according to an embodiment of the present application;

[0035] Figure 2 yes Figure 1 A bottom view schematic diagram of the pre-crushing assembly structure in the illustrated embodiment;

[0036] Figure 3 yes Figure 1 A schematic front view of a local structure of a pre-crushing assembly in the illustrated embodiment;

[0037] Figure 4 yes Figure 1 A bottom view schematic diagram of the local structure of the pre-crushing assembly in the illustrated embodiment;

[0038] Figure 5 yes Figure 1 A schematic diagram of the connection structure of the filter frame in the illustrated embodiment;

[0039] Figure 6 yes Figure 1A schematic diagram of the structure of the scraper assembly in the illustrated embodiment;

[0040] Figure 7 yes Figure 1 A schematic front cross-sectional view of a local structure in the illustrated embodiment.

[0041] The meanings of the reference numerals in the figure are as follows: 1. crushing box; 2. crushing roller; 3. protective cover; 4. driving motor; 5. connecting pipe; 6. pre-screening treatment box; 7. water inlet pipe; 8. fixed mesh frame; 9. filter net one; 10. supporting partition frame; 11. fixed cover; 12. rotating rod; 13. sprocket; 14. conveying chain; 15. connecting rod; 16. cleaning scraper; 17. connecting shaft; 18. movable groove; 19. driving belt; 20. filter tube; 21. filter net two; 22. connecting pipe; 23. drain pipe; 24. return pipe; 25. check valve; 26. electric valve. DETAILED DESCRIPTION

[0042] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Reference Figures 1 to 7 A large-volume solid pre-crushing component for a slurry pump water inlet and a method of use thereof, comprising a crushing box 1, a crushing roller 2 is rotatably connected to the crushing box 1 through a bearing, a protective cover 3 is fixed to the side of the crushing box 1, a driving motor 4 is arranged on the side of the protective cover 3 away from the crushing box 1, the ends of the two crushing rollers 2 rotate and penetrate into the protective cover 3, the ends of the two crushing rollers 2 in the protective cover 3 are both fixed with gears, and the two gears are meshed and connected, and the output rod of the driving motor 4 rotates and penetrates into the protective cover 3 and is fixed to one of the ends of the crushing rollers 2;

[0044] A connecting pipe 5 is fixed through the bottom of the crushing box 1, a pre-screening box 6 is fixed through the end of the connecting pipe 5 away from the crushing box 1, a drain pipe 23 is fixed through the top of the pre-screening box 6 on the side of the connecting pipe 5, a water inlet pipe 7 is fixed through the bottom of the pre-screening box 6 below the drain pipe 23, a supporting partition frame 10 is fixed inside the pre-screening box 6 below the drain pipe 23, which is used to separate the connecting pipe 5 and the inside of the pre-screening box 6 below the drain pipe 23, a filter screen 9 is detachably fixed on the bottom surface of the supporting partition frame 10, a scraper assembly is arranged inside the pre-screening box 6 on the bottom surface of the filter screen 9, a filter tube 20 is fixed through the top of the crushing box 1, and the end of the filter tube 20 away from the crushing box 1 is connected to the drain pipe 23.

[0045] Specifically, through holes matching with the connecting pipe 5 and the drain pipe 23 are provided at the bottom of the crushing box 1 and the top of the pre-screening box 6. The end of the water inlet pipe 7 away from the pre-screening box 6 is configured in a trumpet shape to facilitate the inhalation of water and mineral blocks. The inner diameter of the water inlet pipe 7 is equal to the inner diameter of the drain pipe 23. The support partition frame 10 is configured in an L-shape matching with the through hole at the bottom of the drain pipe 23. A through groove matching with the through hole is provided at the bottom of the support partition frame 10. A fixed mesh frame 8 is detachably fixed to the bottom of the support partition frame 10 by bolts. The fixed mesh frame 8 is configured in a rectangular shape matching with the bottom of the support partition frame 10. A filter mesh 9 is fixed inside the fixed mesh frame 8, and the bottom surface of the filter mesh 9 is flush with the bottom surface of the fixed mesh frame 8.

[0046] As an optimization solution, the scraper assembly includes a conveying chain 14 and a cleaning scraper 16. A fixed cover 11 is fixed on the front and rear sides of the pre-screening processing box 6. The two fixed covers 11 are symmetrically connected to the rotating rods 12 through bearings. One of the rotating rods 12 penetrates to the outside of the fixed cover 11 and is fixed with a pulley. Another pulley is fixed to the outer surface of the output rod of the driving motor 4. The two pulleys are connected by a transmission belt 19. A sprocket 13 is fixed on each rotating rod 12. A conveying chain 14 is meshed and sleeved between the two sprockets 13 on each side. A number of connecting rods 15 are equidistantly fixed between the outer sides of the front and rear conveying chains 14. A cleaning scraper 16 is fixed to the outer side of each conveying chain 14 for scraping large-volume solids on the bottom surface of the filter screen 9.

[0047] Specifically, movable grooves 18 cooperating with the connecting rod 15 are provided on the front and rear sides of the pre-screening processing box 6, and the two movable grooves 18 are both arranged in a runway shape. Each connecting rod 15 is arranged as a cylinder cooperating with the movable groove 18, and a connecting shaft 17 is fixed between the two rotating rods 12 near the end of the connecting pipe 5. The connecting shaft 17 is located inside the pre-screening processing box 6 below the connecting pipe 5. The length of each cleaning scraper 16 is greater than the length of the filter screen 9, and the height of each cleaning scraper 16 is equal to the distance between the connecting rod 15 and the side of the filter screen 9. The height of each cleaning scraper 16 is less than the distance between the bottom surface of the conveying chain 14 and the bottom surface inside the pre-screening processing box 6. Each cleaning scraper 16 is arranged to be inclined at the end away from the connecting rod 15 toward the connecting pipe 5.

[0048] As a further optimization scheme, the inner circle diameter of the filter tube 20 is larger than the inner circle diameter of the connecting tube 22. A return pipe 24 is fixed through the side of the filter tube 20. The end of the return pipe 24 away from the filter tube 20 is fixed through the upper part of the water inlet pipe 7. A filter screen 21 is fixed inside the filter tube 20 at the top of the return pipe 24. The mesh number of the filter screen 21 is the same as that of the filter screen 1 9. The return pipe 24 is configured to be a horizontally placed U-shape that cooperates with the crushing box 1 and the pre-screening treatment box 6. A check valve 25 is provided at the end of the return pipe 24 close to the water inlet pipe 7, and an electric valve 26 is provided at the end of the connecting tube 22 close to the filter tube 20. A flow meter is provided on the electric valve 26. The output end of the flow meter is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the input end of the electric valve 26, so that the opening and closing of the electric valve 26 is controlled by the flow rate.

[0049] Instructions for use: Fix the drain pipe 23 at the water inlet of the slurry pump, turn on the slurry pump to start conveying the slurry, turn on the drive motor 4 while turning on the slurry pump. When the slurry pump is running to extract the slurry, solid minerals that meet the volume pass through the filter screen 9 and enter the support partition frame 10, and enter the drain pipe 23 through the support partition frame 10. They are drawn into the slurry pump through the drain pipe 23 along with the water flow, and solid minerals that do not meet the volume are filtered by the filter screen 9 and retained in the pre-screening treatment box 6. At this time, the drive motor 4 runs through the transmission belt 19 to drive the rotating rod 12 to rotate. When the rotating rod 12 rotates, the belt The conveying chain 14 moves, and when the conveying chain 14 moves, it drives the cleaning scraper 16 to move toward the side of the connecting pipe 5. When the cleaning scraper 16 moves, the bulk fixed minerals adsorbed on the bottom of the filter screen 9 due to the negative pressure generated during extraction after filtration are pushed to the bottom of the connecting pipe 5. Since the connecting pipe 5 is connected to the inside of the crushing box 1, the crushing box 1 is connected to the drain pipe 23 through the filter pipe 20 and the connecting pipe 22. At this time, the inside of the crushing box 1 also has a certain negative pressure adsorption force. Under the action of the suction force, the bulk mineral blocks pushed to the bottom of the connecting pipe 5 are brought into the crushing box 1 with the water flow for crushing;

[0050] Fixed minerals that do not meet the volume requirements are crushed. After the large-volume mineral blocks enter the crushing box 1 with the water flow, the driving motor 4 is in operation, driving the gear connected to the protective cover 3 to rotate. When the gear rotates, it drives the other gear meshed with it to rotate relatively, thereby driving the two crushing rollers 2 to rotate relatively. When the relative rotation occurs, the minerals are driven to enter between the two crushing rollers 2 and crushed. The crushed mineral blocks continue to move to the inside of the filter tube 20 driven by the water flow, and under the filtration of the filter screen 21, the qualified mineral blocks after crushing flow through the connecting pipe 22 to the inside of the drain pipe 23 and enter the slurry pump, and the unqualified mineral blocks after crushing stay in the filter tube 20;

[0051] The unqualified mineral blocks are returned for secondary crushing. When there are many unqualified mineral blocks filtered out from the filter tube 20, they will be more adsorbed on the bottom surface of the second filter screen 21 under the action of the adsorption force at the end of the connecting tube 22. When there are many mineral blocks adsorbed on the bottom surface of the second filter screen 21, the adsorption force inside the filter tube 20 is weakened, and the water flow cannot pass through the second filter screen 21 into the connecting tube 22, resulting in a decrease in the flow rate inside the connecting tube 22. After the flow rate decreases, the electric valve 26 is closed. At this time, the adsorption force inside the filter tube 20 disappears. Under the action of the adsorption force inside the water inlet pipe 7, part of the water flow inside the pre-screening treatment box 6 and the crushing box 1 enter the filter tube 20, and drive the slurry inside the filter tube 20 to flow back, which can bring The unqualified mineral blocks flow into the water inlet pipe 7, and re-enter the pre-screening treatment box 6 under the adsorption of the water inlet pipe 7. After entering the pre-screening treatment box 6, the unqualified mineral blocks are screened by the filter screen 9 and continue to enter the crushing box 1 for crushing, and the check valve 25 is in a normally open state. When the adsorption force of the connecting pipe 22 on the inside of the filter tube 20 is greater than the adsorption force applied to the end of the filter tube 20 by the water inlet pipe 7, under the action of the check valve 25, the water flow will not directly enter the filter tube 20 through the return pipe 24. After the unqualified mineral blocks flow back, the electric valve 26 is opened, and the filter screen 21 can continue to filter, so that the mineral blocks and water flow after crushing and filtering continue to enter the drain pipe 23 through the connecting pipe 22.

[0052] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A bulk solid pre-crushing assembly for a slurry pump inlet, characterized by: The invention comprises a crushing box (1), wherein a crushing roller (2) is rotatably connected to the crushing box (1) via a bearing, a protective cover (3) is fixed to the side of the crushing box (1), a driving motor (4) is arranged on the side of the protective cover (3) away from the crushing box (1), the ends of the two crushing rollers (2) are rotated to penetrate into the protective cover (3), the ends of the two crushing rollers (2) in the protective cover (3) are both fixed with gears, and the two gears are meshed and connected, and the output rod of the driving motor (4) is rotated to penetrate into the protective cover (3) and fixed to the end of one of the crushing rollers (2); A connecting pipe (5) is fixedly passed through the bottom of the crushing box (1); a pre-screening box (6) is fixedly passed through the end of the connecting pipe (5) away from the crushing box (1); a drainage pipe (23) is fixedly passed through the top of the pre-screening box (6) on the side of the connecting pipe (5); a water inlet pipe (7) is fixedly passed through the bottom of the pre-screening box (6) below the drainage pipe (23); a supporting partition frame (10) is fixedly provided inside the pre-screening box (6) below the drainage pipe (23) for separating the connecting pipe (5) from the inside of the pre-screening box (6) below the drainage pipe (23); a filter screen (9) is detachably fixedly provided on the bottom of the supporting partition frame (10); a scraper assembly is provided inside the pre-screening box (6) on the bottom of the filter screen (9); a filter pipe (20) is fixedly passed through the top of the crushing box (1); the end of the filter pipe (20) away from the crushing box (1) is connected to the drainage pipe (23); The scraper assembly comprises a conveying chain (14) and a cleaning scraper (16). The front and rear sides of the pre-screening treatment box (6) are both fixed with a fixed cover (11). The two fixed covers (11) are symmetrically rotatably connected to a rotating rod (12) through a bearing. Each rotating rod (12) is fixedly sleeved with a sprocket (13). A conveying chain (14) is meshed and sleeved between the two sprockets (13) on each side. A plurality of connecting rods (15) are equidistantly fixed between the outer sides of the front and rear conveying chains (14). A cleaning scraper (16) is fixed on the outer side of each conveying chain (14) for scraping large-volume solids on the bottom surface of the filter screen (9). The inner diameter of the filter tube (20) is larger than the inner diameter of the connecting tube (22); a return tube (24) is fixedly passed through the side of the filter tube (20); one end of the return tube (24) away from the filter tube (20) is passed through and fixed to the upper part of the water inlet tube (7); a second filter screen (21) is fixed inside the filter tube (20) at the top of the return tube (24); and an electric valve (26) is provided at one end of the connecting tube (22) close to the filter tube (20).

2. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: The bottom of the crushing box (1) and the top of the pre-screening box (6) are both provided with through holes that cooperate with the connecting pipe (5) and the drainage pipe (23); the end of the water inlet pipe (7) away from the pre-screening box (6) is arranged in a trumpet shape; the inner diameter of the water inlet pipe (7) is equal to the inner diameter of the drainage pipe (23).

3. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: The support partition frame (10) is configured to be L-shaped and to match the through hole at the bottom of the drain pipe (23); a through slot matching the through hole is provided at the bottom of the support partition frame (10); a fixed net frame (8) is detachably fixed to the bottom of the support partition frame (10) by bolts; the fixed net frame (8) is configured to be a rectangle matching the bottom of the support partition frame (10); a filter net 1 (9) is fixed inside the fixed net frame (8); and the bottom surface of the filter net 1 (9) is flush with the bottom surface of the fixed net frame (8).

4. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: One of the rotating rods (12) penetrates the outside of the fixed cover (11) and is fixed with a pulley, and another pulley is fixed on the outer surface of the output rod of the driving motor (4), and the two pulleys are connected by a transmission belt (19).

5. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: The front and rear sides of the pre-screening processing box (6) are both provided with movable grooves (18) that cooperate with the connecting rods (15); the two movable grooves (18) are both arranged in a runway shape; each of the connecting rods (15) is arranged in a cylindrical shape that cooperates with the movable groove (18); a connecting shaft (17) is fixed between the two rotating rods (12) near the ends of the connecting pipe (5); the connecting shaft (17) is located inside the pre-screening processing box (6) below the connecting pipe (5).

6. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: The length of each cleaning scraper (16) is greater than the length of the filter screen (9), the height of each cleaning scraper (16) is equal to the distance between the connecting rod (15) and the side of the filter screen (9), the height of each cleaning scraper (16) is less than the distance between the bottom surface of the conveying chain (14) and the inner bottom surface of the pre-screening treatment box (6), and the end of each cleaning scraper (16) away from the connecting rod (15) and toward the connecting pipe (5) is arranged in an inclined shape.

7. The large-volume solid pre-crushing assembly for the water inlet of a slurry pump according to claim 1, characterized in that: The mesh number of the second filter screen (21) is the same as that of the first filter screen (9), the return pipe (24) is arranged in a transversely placed U-shape to cooperate with the crushing box (1) and the pre-screening treatment box (6), a check valve (25) is arranged at one end of the return pipe (24) close to the water inlet pipe (7), and a flow meter is arranged on the electric valve (26).

8. A method for using the large-volume solid pre-crushing assembly for a slurry pump water inlet derived from the large-volume solid pre-crushing assembly for a slurry pump water inlet according to claim 7, characterized in that: The method of use comprises the following steps: Step A, fixing the drainage pipe (23) to the water inlet of the slurry pump, and turning on the slurry pump to start conveying the slurry; Step A1, turning on the slurry pump and the driving motor (4) at the same time, when the slurry pump is running to extract slurry, solid minerals of the volume that meet the volume pass through the filter screen 1 (9) into the interior of the support partition frame (10), and enter the interior of the drainage pipe (23) through the support partition frame (10), and are sucked into the slurry pump through the drainage pipe (23) along with the water flow; Step A2, solid minerals that do not meet the volume requirements are retained in the pre-screening treatment box (6) after being filtered by the filter screen (9). At this time, the driving motor (4) drives the rotating rod (12) to rotate through the transmission belt (19). When the rotating rod (12) rotates, it drives the conveying chain (14) to move. When the conveying chain (14) moves, it drives the cleaning scraper (16) to move toward the connecting pipe (5). When the cleaning scraper (16) moves, it pushes the large-volume fixed minerals adsorbed on the bottom surface of the filter screen (9) due to the negative pressure generated during extraction after filtration to the bottom of the connecting pipe (5); Step A3, since the connecting pipe (5) is connected to the inside of the crushing box (1), the crushing box (1) is connected to the drainage pipe (23) through the filter pipe (20) and the connecting pipe (22), and the inside of the crushing box (1) also has a certain negative pressure adsorption force. Under the action of the suction force, the large-volume mineral blocks pushed to the bottom of the connecting pipe (5) are brought into the crushing box (1) along with the water flow for crushing; Step B, crushing the fixed minerals that do not meet the volume; Step B1, after the large-volume mineral block enters the crushing box (1) along with the water flow, the driving motor (4) is in operation, driving the gear connected to the protective cover (3) to rotate. When the gear rotates, it drives another gear meshing with it to rotate relatively, thereby driving the two crushing rollers (2) to rotate relatively. When the two crushing rollers (2) rotate relatively, the mineral is driven into between the two crushing rollers (2) and crushed; Step B2, the crushed mineral blocks continue to move into the filter tube (20) under the drive of the water flow, and under the filtration of the second filter screen (21), the qualified mineral blocks after crushing flow into the drainage pipe (23) through the connecting pipe (22) and enter the slurry pump, and the unqualified mineral blocks after crushing remain in the filter tube (20); Step C, reflowing the unqualified mineral blocks for secondary crushing; Step C1, when a large number of unqualified mineral blocks are filtered out from the inside of the filter tube (20), under the action of the adsorption force at the end of the connecting tube (22), a large number of the mineral blocks will be adsorbed on the bottom surface of the second filter screen (21). When a large number of the mineral blocks are adsorbed on the bottom surface of the second filter screen (21), the adsorption force on the inside of the filter tube (20) is weakened, and the water flow cannot pass through the second filter screen (21) into the inside of the connecting tube (22), resulting in a decrease in the flow rate inside the connecting tube (22); Step C2, after the flow rate decreases, the electric valve (26) is closed, at which time the adsorption force inside the filter tube (20) disappears, and under the action of the adsorption force inside the water inlet pipe (7), part of the water flow inside the pre-screening treatment box (6) and the crushing box (1) enter the filter tube (20), and drive the slurry inside the filter tube (20) to flow back, thereby driving the unqualified mineral blocks to flow into the water inlet pipe (7); Step C3, under the adsorption of the water inlet pipe (7), the water re-enters the interior of the pre-screening treatment box (6), and after entering the interior of the pre-screening treatment box (6), the water continues to enter the interior of the crushing box (1) for crushing after being screened by the filter screen (9) and the check valve (25) is in a normally open state. When the adsorption force of the connecting pipe (22) on the interior of the filter tube (20) is greater than the adsorption force applied by the water inlet pipe (7) to the end of the filter tube (20), under the action of the check valve (25), the water flow will not directly enter the interior of the filter tube (20) through the return pipe (24); Step C4, after the unqualified mineral blocks are returned, the electric valve (26) is opened, and the filter screen 2 (21) can continue to filter, so that the mineral blocks and water flow after crushing and filtering continue to enter the drainage pipe (23) through the connecting pipe (22).

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