Production crushing device for machine-made sand preparation

Abstract

The invention relates to the technical field of machine-made sand preparation, and discloses a production crushing device for machine-made sand preparation, the production crushing device comprises a crushing box, the upper end face of the crushing box is provided with a feeding port, a plurality of spraying heads are installed above the two sides of the inner wall of the feeding port, and two crushing rollers are installed above the interior of the crushing box; dust suction devices are installed on the two sides of the outer surface of the crushing box in a penetrating mode. The dust removal device is good in dust removal effect, water flow for dust removal can be filtered and recycled, a dust screen can be beaten, and the subsequent use effect is guaranteed; an inclined plate can be conveniently maintained, unqualified raw materials can be screened and then subjected to secondary crushing, and the preparation effect is guaranteed; the problems that smoke generated during primary crushing of raw materials is large and pollutes the environment, and a vibrating screen of a common crushing device is difficult to replace and maintain due to the fact that the vibrating screen is vibrated for a long time and a screen body is very easy to damage are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of manufactured sand preparation, and specifically to a production crushing device for manufactured sand preparation. Background Art

[0002] Manufactured sand is particles with a particle size less than 4.75 mm made by rock blasting and crushing or using river gravels, which are mechanically crushed and screened. It is angular, and the particle gradation under the same fineness modulus is inferior to that of natural sand. When used to prepare concrete, it will have characteristics different from those of natural sand concrete in terms of mix ratio, construction performance, mechanical and durability properties. Although the current building sand standard lists manufactured sand as building sand, due to the consideration of controlling the mud content, the stone powder content is also strictly restricted, which greatly restricts the innovation of the manufactured sand production process.

[0003] However, at present, when the raw materials of manufactured sand are initially crushed, large amounts of dust are generated due to the material, polluting the environment. Moreover, for common crushing devices, the vibrating screen is easily damaged due to long-term vibration, and it is relatively difficult to replace and repair the vibrating screen; therefore, it does not meet the existing requirements, and for this reason, we propose a production crushing device for manufactured sand preparation. Summary of the Invention

[0004] The purpose of the present invention is to provide a production crushing device for manufactured sand preparation to solve the problems mentioned in the above background art, that is, when the raw materials of manufactured sand are initially crushed, large amounts of dust are generated due to the material, polluting the environment, and for common crushing devices, the vibrating screen is easily damaged due to long-term vibration, and it is relatively difficult to replace and repair the vibrating screen.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A production crushing device for manufactured sand preparation, including a crushing box. An inlet is arranged on the upper end surface of the crushing box. A plurality of spray heads are installed above both sides of the inner wall of the inlet. Two crushing rolls are installed above the inside of the crushing box. Dust collection devices are installed through both sides of the outer surface of the crushing box. The dust collection device includes a dust collection box body. A dust-proof net is installed inside the dust collection box body. A striking device is arranged on one side of the dust-proof net. A horizontal groove and a square groove are sequentially arranged from top to bottom on the front end surface of the crushing box. A U-shaped frame is movably installed inside the horizontal groove. A groove is arranged on the rear end surface of the U-shaped frame. A mounting plate is arranged inside the groove. An inclined plate is fixedly installed on the rear end surface of the mounting plate. A plurality of sieve holes are arranged through the outer surface of the inclined plate. A vibrating motor is installed on the lower end surface of the inclined plate. A water tank is arranged inside the square groove. A filtering mechanism is movably installed above the inside of the water tank through a sliding and popping mechanism. A feeding mechanism is installed on the rear end surface of the crushing box. A water pump is installed below the feeding mechanism.

[0006] Preferably, the feeding mechanism includes a housing, a first rotating motor is installed on the lower end surface of the housing, the output end of the first rotating motor is fixedly connected with a rotating shaft, a feeding auger is installed on the outer surface of the rotating shaft, a discharge pipe is installed above the front end surface of the housing, the discharge pipe is connected through the housing, and an opening is arranged below the front end surface of the housing.

[0007] Preferably, a dust suction pump is installed on one side of the inner wall of the dust suction box body, a plurality of dust suction heads are installed on the other side of the outer surface of the dust suction box body, a dust collection box is installed below the dust suction box body, a threaded hole is arranged on one side of the lower end surface of the dust collection box, a hollow pipe is arranged inside the threaded hole, an external thread is arranged on the outer surface of the hollow pipe, and the external thread is screwed with the threaded hole.

[0008] Preferably, a filter screen is installed above the inner side of the hollow pipe, the bottom surface of the dust collection box is an inclined surface, and the dust collection box is connected through a through groove with the dust suction box body.

[0009] Preferably, the striking device includes a fixing plate, a through hole is arranged through the outer surface of the fixing plate, a plug rod is arranged inside the through hole, a first spring is sleeved on the outer surface of the plug rod, a striking ball is installed at one end of the plug rod close to the dust-proof net, and a movable plate is fixedly installed at the other end of the plug rod.

[0010] Preferably, a pin shaft is arranged above the plug rod, a cam is sleeved on the outer surface of the pin shaft, a second rotating motor is installed in front of the pin shaft, the second rotating motor is fixedly connected with the front end surface of the pin shaft through a short shaft, and the rear end surface of the pin shaft is rotationally connected with the inner surface of the dust suction box body through a bearing.

[0011] Preferably, the filtering mechanism includes a sand layer, a filter cotton is arranged below the sand layer, a water-permeable non-woven fabric is arranged below the filter cotton, the sliding and popping mechanism includes a cross plate, the cross plates are located on both sides below the filtering mechanism, the cross plates are fixedly connected with the inner wall of the water tank, a plurality of circular grooves are arranged on the upper end surface of the cross plates, and a third spring is installed on the bottom surface of the circular grooves.

[0012] Preferably, slots are arranged above both sides of the inner wall of the water tank, a plurality of second springs are installed on the inner walls of the slots, the other ends of the plurality of second springs are fixedly connected with a pressing plate, and arc grooves are arranged above the opposite sides of the outer surfaces of the two pressing plates.

[0013] Preferably, a vertical plate is installed below the rear end of the inner wall of the U-shaped frame. A plurality of positioning columns are installed on the lower end surface of the inclined plate. A plurality of positioning holes are provided on the upper end surface of the vertical plate, and the positioning columns are respectively inserted into the corresponding positioning holes. The U-shaped frame and the mounting plate are movably connected by bolts. The aperture of the sieve holes is less than 4.75 mm. A first handle is installed on the front end surface of the U-shaped frame. Clamping plates are installed on both sides of the outer surface of the U-shaped frame. Card slots are provided on both sides of the inner wall of the horizontal groove, and the clamping plates are inserted into the card slots. A second handle is installed on the front end surface of the water tank.

[0014] Preferably, one end of the water pump is connected to the water tank through a telescopic hose. A circulating pipe is installed outside the feeding mechanism. The water pump is connected to the circulating pipe through a first water pipe. The circulating pipe is connected to the spray head through a second water pipe. Two third rotating motors are installed in the front of the crushing box through a motor cavity. The third rotating motors are fixedly connected to the front end surfaces of the crushing rollers through couplings. The rear end surfaces of the crushing rollers are rotationally connected to the inner walls of the crushing box through bearings.

[0015] Preferably, a plurality of filter holes are provided on the bottom surface of the collection box. The diameter of the filter holes is much less than 4.75 mm. The collection box is placed above the two pressing plates. A limiting plate is installed on the upper end surface of the pressing plate. Limiting grooves are provided on both sides of the lower end surface of the collection box, and the limiting plates are inserted into the limiting grooves.

[0016] In the present invention, by providing a dust suction device, a water pump, a filtering mechanism, and a water tank, when crushing the raw materials of the machine-made sand, the switches of the dust suction pump and the water pump can be turned on simultaneously. When the dust suction pump works, the collected dust will be concentrated on one side of the dust collection box. At the same time, when the water pump works, the water in the water tank can be sprayed out by the spray head through the telescopic hose, the first water pipe, the circulating pipe, and the second water pipe for dust reduction. And the sprayed water flow can be filtered by the filtering mechanism and then flow back into the water tank for recycling. And by providing a striking device, the switch of the second rotating motor can be turned on. When the second rotating motor works, it can drive the pin shaft to rotate, thereby driving the cam to rotate. When the cam rotates, the movable plate is pushed towards the side away from the dust-proof net. When the cam leaves the outer surface of the movable plate, the insertion rod rebounds under the action of the first spring to strike the dust-proof net, vibrate the dust on the surface of the dust-proof net, and make it fall off to ensure the dust-proof effect of the dust-proof net. The present invention improves the dust removal effect through spray dust reduction and dust suction, can filter and recycle the water flow for dust reduction, and can strike the dust-proof net to ensure the subsequent use effect.

[0017] In the present invention, by providing a U-shaped frame, a groove, and a mounting plate, the U-shaped frame can be pulled out from the inside of the horizontal groove through the first handle. By unscrewing the bolt, the limitation on the mounting plate can be released, and the mounting plate can be removed from the inside of the groove. Thus, the inclined plate can be removed from the inside of the U-shaped frame for maintenance. Moreover, by providing a feeding mechanism, the raw materials that do not meet the crushing standard are conveyed to the inside of the housing through the opening and are upwardly transported by the feeding auger. The rising raw materials can enter the crushing box again through the discharge pipe and the feed inlet for secondary crushing, ensuring the crushing effect. The present invention facilitates the maintenance of the inclined plate and can screen the unqualified raw materials for secondary crushing to ensure the preparation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0019] Figure 2 is a main sectional view of the whole of the present invention;

[0020] Figure 3 is a schematic partial structural diagram of the dust collection device of the present invention;

[0021] Figure 4 is a schematic partial structural diagram of the striking device of the present invention;

[0022] Figure 5 is a schematic partial structural diagram of the sliding and ejecting mechanism of the present invention;

[0023] Figure 6 is a side sectional view of the whole of the present invention;

[0024] Figure 7 is a schematic partial structural diagram of the U-shaped frame of the present invention;

[0025] Figure 8 is a schematic structural diagram of the back of the whole of the present invention.

[0026] In the figure: 1. Crushing box; 2. Circulation pipe; 3. Feeding mechanism; 301. Housing; 302. Rotating shaft; 303. Discharge pipe; 304. Feeding auger; 305. Opening; 306. First rotating motor; 4. Feeding port; 5. Horizontal groove; 6. U-shaped frame; 7. Square groove; 8. Water tank; 9. Dust suction device; 901. Dust suction pump; 902. Dust suction box body; 903. Dustproof net; 904. Dust suction head; 905. Dust collection box; 906. Through groove; 907. Inclined plane; 908. Hollow pipe; 909. Threaded hole; 910. Filter screen; 10. Spraying head; 11. Crushing roller; 12. Filtering mechanism; 1201. Sand layer; 1202. Filter cotton; 1203. Permeable non-woven fabric; 13. Striking device; 1301. Movable plate; 1302. Pin shaft; 1303. Cam; 1304. First spring; 1305. Through hole; 1306. Fixed plate; 1307. Striking ball; 1308. Insert rod; 14. Sliding and popping mechanism; 1401. Slot; 1402. Second spring; 1403. Pressing plate; 1404. Arc groove; 1405. Horizontal plate; 1406. Round groove; 1407. Third spring; 15. Water pump; 16. Inclined plate; 17. Vibration motor; 18. Sieve hole; 19. Groove; 20. Mounting plate; 21. First water pipe; 22. Collection box. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] Please refer to Figures 1 to 8 A production crushing device for preparing machine-made sand provided by the present invention includes a crushing box 1. A feeding port 4 is arranged on the upper end surface of the crushing box 1. A plurality of spraying heads 10 are installed above both sides of the inner wall of the feeding port 4. Two crushing rollers 11 are installed above the inside of the crushing box 1. Dust suction devices 9 are installed through both sides of the outer surface of the crushing box 1. The dust suction device 9 includes a dust suction box body 902. A dustproof net 903 is installed inside the dust suction box body 902. A striking device 13 is arranged on one side of the dustproof net 903. A horizontal groove 5 and a square groove 7 are arranged on the front end surface of the crushing box 1 from top to bottom in sequence. A U-shaped frame 6 is movably installed inside the horizontal groove 5. A groove 19 is arranged on the rear end surface of the U-shaped frame 6. A mounting plate 20 is arranged inside the groove 19. An inclined plate 16 is fixedly installed on the rear end surface of the mounting plate 20. A plurality of sieve holes 18 are arranged through the outer surface of the inclined plate 16. A vibration motor 17 is installed on the lower end surface of the inclined plate 16. A water tank 8 is arranged inside the square groove 7. A filtering mechanism 12 is movably installed above the inside of the water tank 8 through a sliding and popping mechanism 14. A feeding mechanism 3 is installed on the rear end surface of the crushing box 1. A water pump 15 is installed below the feeding mechanism 3.

[0029] Further, the feeding mechanism 3 includes a housing 301. A first rotating motor 306 is installed on the lower end face of the housing 301. The output end of the first rotating motor 306 is fixedly connected to a rotating shaft 302. A feeding auger 304 is installed on the outer surface of the rotating shaft 302. A discharge pipe 303 is installed above the front end face of the housing 301. The discharge pipe 303 is connected through the housing 301. An opening 305 is provided below the front end face of the housing 301. When the first rotating motor 306 works, it can drive the rotating shaft 302 to rotate, drive the feeding auger 304 to feed, and the rising raw materials can enter the crushing box 1 again through the discharge pipe 303 and then through the feeding port 4.

[0030] A dust suction pump 901 is installed on one side of the inner wall of the dust suction box body 902. A plurality of dust suction heads 904 are installed on the other side of the outer surface of the dust suction box body 902. A dust collection box 905 is installed below the dust suction box body 902. A threaded hole 909 is provided on one side of the lower end face of the dust collection box 905. A hollow pipe 908 is provided inside the threaded hole 909. The outer surface of the hollow pipe 908 is provided with an external thread, and the external thread is screwed with the threaded hole 909. When the dust suction pump 901 works, the dust in the crushing box 1 can be absorbed by the dust suction heads 904 and collected inside the dust collection box 905. The hollow pipe 908 can be removed from the inside of the threaded hole 909 by rotating the hollow pipe 908.

[0031] A filter screen 910 is installed above the inside of the hollow pipe 908. The bottom surface of the dust collection box 905 is an inclined surface 907. The dust collection box 905 and the dust suction box body 902 are connected through a through slot 906. The collected dust will be concentrated on one side of the dust collection box 905.

[0032] The hitting device 13 includes a fixing plate 1306. A through hole 1305 is provided through the outer surface of the fixing plate 1306. A plug rod 1308 is provided inside the through hole 1305. A first spring 1304 is sleeved on the outer surface of the plug rod 1308. A hitting ball 1307 is installed at one end of the plug rod 1308 close to the dustproof net 903. The other end of the plug rod 1308 is fixedly installed with a movable plate 1301; a pin shaft 1302 is provided above the plug rod 1308. A cam 1303 is sleeved on the outer surface of the pin shaft 1302. A second rotating motor is installed in front of the pin shaft 1302. The second rotating motor is fixedly connected to the front end face of the pin shaft 1302 through a short shaft. The rear end face of the pin shaft 1302 is rotatably connected to the inner surface of the dust suction box body 902 through a bearing. When the second rotating motor works, it can drive the pin shaft 1302 to rotate, thereby driving the cam 1303 to rotate. When the cam 1303 rotates, the movable plate 1301 is pushed to the side away from the dustproof net 903. When the cam 1303 leaves the outer surface of the movable plate 1301, the plug rod 1308 rebounds under the action of the first spring 1304 and hits the dustproof net 903, vibrating the dust on the surface of the dustproof net 903 to make it fall off, ensuring the dustproof effect of the dustproof net 903.

[0033] Further, the filtering mechanism 12 includes a sand and gravel layer 1201. A filter cotton 1202 is arranged below the sand and gravel layer 1201, and a water-permeable non-woven fabric 1203 is arranged below the filter cotton 1202. The sliding and ejecting mechanism 14 includes a cross plate 1405. The cross plate 1405 is located on both sides below the filtering mechanism 12. The cross plate 1405 is fixedly connected to the inner wall of the water tank 8. A plurality of circular grooves 1406 are arranged on the upper end surface of the cross plate 1405, and a third spring 1407 is installed on the bottom surface of the circular groove 1406, so that the filtering mechanism 12 has a better effect on filtering the water after dust reduction, and the connection stability between the cross plate 1405 and the water tank 8 is improved.

[0034] Slots 1401 are arranged above both sides of the inner wall of the water tank 8. A plurality of second springs 1402 are installed on the inner wall of the slots 1401. The other ends of the plurality of second springs 1402 are fixedly connected to a pressing plate 1403. Arc-shaped grooves 1404 are arranged above the relatively one side of the outer surfaces of the two pressing plates 1403. The pressing plate 1403 can be moved towards the inner side of the slot 1401 through the arc-shaped groove 1404 to release the limit on the filtering mechanism 12. Under the action of the third spring 1407, the filtering mechanism 12 is pushed upwards, and the filtering mechanism 12 can be removed and replaced.

[0035] A vertical plate is installed below the rear end of the inner wall of the U-shaped frame 6. A plurality of positioning columns are installed on the lower end surface of the inclined plate 16. A plurality of positioning holes are arranged on the upper end surface of the vertical plate, and the positioning columns are respectively clamped into the corresponding positioning holes. The U-shaped frame 6 is movably connected to the mounting plate 20 through bolts. The aperture of the sieve holes 18 is less than 4.75 mm. A first handle is installed on the front end surface of the U-shaped frame 6. Clamping plates are installed on both sides of the outer surface of the U-shaped frame 6. Card slots are arranged on both sides of the inner wall of the transverse groove 5, and the clamping plates are clamped into the inner side of the card slots. A second handle is installed on the front end surface of the water tank 8, which improves the placement stability of the inclined plate 16. The bolts can be unscrewed to release the limit on the mounting plate 20, and the mounting plate 20 can be removed from the inner side of the groove 19, so that the inclined plate 16 can be maintained, and the placement stability of the U-shaped frame 6 is improved.

[0036] One end of the water pump 15 is connected to the water tank 8 through a telescopic hose. A circulating pipe 2 is installed outside the feeding mechanism 3. The water pump 15 is connected to the circulating pipe 2 through a first water pipe 21. The circulating pipe 2 is connected to the spray head 10 through a second water pipe. Two third rotating motors are installed in the front of the crushing box 1 through a motor cavity. The third rotating motors are fixedly connected to the front end surfaces of the crushing rollers 11 through couplings. The rear end surfaces of the crushing rollers 11 are rotatably connected to the inner wall of the crushing box 1 through bearings. When the water pump 15 works, the water in the water tank 8 can be sprayed out by the spray head 10 through the telescopic hose, the first water pipe 21, the circulating pipe 2 and the second water pipe for dust reduction.

[0037] The bottom surface of the collection box 22 is provided with a plurality of filter holes, the diameter of the filter holes is much smaller than 4.75 mm, the collection box 22 is placed above the two pressing plates 1403, the upper end surface of the pressing plate 1403 is provided with a limiting plate, and the two sides of the lower end surface of the collection box 22 are provided with limiting grooves, and the limiting plate is snapped into the inner side of the limiting groove to prevent the loss of the raw materials after being broken. The collection box 22 can be removed from above the pressing plate 1403.

[0038] When the production crushing device for preparing machine-made sand is in use, first connect the power supply. When crushing the raw materials for machine-made sand, the switches of the dust suction pump 901 and the water pump 15 can be turned on at the same time. When the dust suction pump 901 works, the collected dust will be concentrated on one side of the dust collection box 905. At the same time, when the water pump 15 works, the water in the water tank 8 can be sprayed out by the spray head 10 through the telescopic hose, the first water pipe 21, the circulation pipe 2 and the second water pipe for dust reduction. And the sprayed water flow can be filtered by the filtering mechanism 12 and then flow back into the water tank 8 for recycling. And by setting the striking device 13, the switch of the second rotating motor can be turned on. When the second rotating motor works, it can drive the pin shaft 1302 to rotate, thereby driving the cam 1303 to rotate. When the cam 1303 rotates, the movable plate 1301 is pushed to the side away from the dustproof net 903. When the cam 1303 leaves the outer surface of the movable plate 1301, the insertion rod 1308 rebounds under the action of the first spring 1304 to strike the dustproof net 903 and vibrate the dust on the surface of the dustproof net 903 to make it fall off, ensuring the dustproof effect of the dustproof net 903. And by setting the U-shaped frame 6, the groove 19 and the mounting plate 20, the U-shaped frame 6 can be pulled out from the inner side of the transverse groove 5 through the first handle, and the bolt can be unscrewed to release the limit on the mounting plate 20, and the mounting plate 20 can be removed from the inner side of the groove 19, so that the inclined plate 16 can be removed from the inner side of the U-shaped frame 6 for maintenance. And by setting the feeding mechanism 3, the raw materials that do not meet the crushing standard are conveyed to the inner side of the housing 301 through the opening 305 and are conveyed upward by the feeding auger 304. The rising raw materials can enter the crushing box 1 again through the discharge pipe 303 and the feeding port 4 for secondary crushing to ensure the crushing effect. The present invention improves the dust removal effect through spray dust reduction and dust suction, and can filter and recycle the water flow for dust reduction, can strike the dustproof net 903 to ensure the subsequent use effect; and is convenient for maintaining the inclined plate 16, can screen the unqualified raw materials for secondary crushing to ensure the preparation effect.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. A production crushing device for the preparation of manufactured sand, characterized in that, It includes a crushing box. A feed inlet is arranged on the upper end face of the crushing box. A plurality of spray heads are installed above both sides of the inner wall of the feed inlet. Two crushing rollers are installed above the inside of the crushing box. Dust suction devices are installed through both sides of the outer surface of the crushing box. The dust suction device includes a dust suction box body. A dust-proof net is installed inside the dust suction box body. A striking device is arranged on one side of the dust-proof net. Horizontal grooves and square grooves are sequentially arranged on the front end face of the crushing box from top to bottom. A U-shaped frame is movably installed inside the horizontal groove. A groove is arranged on the rear end face of the U-shaped frame. A mounting plate is arranged inside the groove. An inclined plate is fixedly installed on the rear end face of the mounting plate. A plurality of sieve holes are arranged through the outer surface of the inclined plate. A vibration motor is installed on the lower end face of the inclined plate. A water tank is arranged inside the square groove. A filtering mechanism is movably installed above the inside of the water tank through a sliding and ejecting mechanism. A collection box is movably arranged above the filtering mechanism. A feeding mechanism is installed on the rear end face of the crushing box. A water pump is installed below the feeding mechanism.

2. The production crushing device for preparing manufactured sand according to claim 1, characterized in that, The feeding mechanism includes a housing. A first rotating motor is installed on the lower end face of the housing. The output end of the first rotating motor is fixedly connected with a rotating shaft. A feeding auger is installed on the outer surface of the rotating shaft. A discharge pipe is installed above the front end face of the housing. The discharge pipe is connected through the housing. An opening is arranged below the front end face of the housing.

3. A production crushing device for preparing manufactured sand according to claim 1, characterized in that, A dust suction pump is installed on one side of the inner wall of the dust suction box body. A plurality of dust suction heads are installed on the other side of the outer surface of the dust suction box body. A dust collection box is installed below the dust suction box body. A threaded hole is arranged on one side of the lower end face of the dust collection box. A hollow pipe is arranged inside the threaded hole. An external thread is arranged on the outer surface of the hollow pipe, and the external thread is screwed with the threaded hole.

4. A production crushing device for preparing manufactured sand according to claim 3, characterized in that, A filter screen is installed above the inside of the hollow pipe. The bottom surface of the dust collection box is an inclined surface. The dust collection box is connected through a through groove with the dust suction box body.

5. A production crushing device for the preparation of manufactured sand according to claim 1, characterized in that, The striking device includes a fixing plate. A through hole is arranged through the outer surface of the fixing plate. A plug rod is arranged inside the through hole. A first spring is sleeved on the outer surface of the plug rod. A striking ball is installed at one end of the plug rod close to the dust-proof net. A movable plate is fixedly installed at the other end of the plug rod.

6. The production crushing device for preparing manufactured sand according to claim 5, wherein, A pin shaft is arranged above the plug rod. A cam is sleeved on the outer surface of the pin shaft. A second rotating motor is installed in front of the pin shaft. The second rotating motor is fixedly connected with the front end face of the pin shaft through a short shaft. The rear end face of the pin shaft is rotationally connected with the inner surface of the dust suction box body through a bearing.

7. A production crushing device for manufactured sand preparation according to claim 1, characterized in that, The filtering mechanism includes a sand layer. A filter cotton is arranged below the sand layer. A water-permeable non-woven fabric is arranged below the filter cotton. The sliding and ejecting mechanism includes cross plates. The cross plates are located on both sides below the filtering mechanism. The cross plates are fixedly connected with the inner wall of the water tank. A plurality of circular grooves are arranged on the upper end face of the cross plates. A third spring is installed on the bottom surface of the circular grooves.

8. A production crushing device for manufactured sand preparation according to claim 7, characterized in that, Above the two sides of the inner wall of the water tank are provided with slots, and a plurality of second springs are installed on the inner walls of the slots. The other ends of the plurality of second springs are fixedly connected to pressing plates. Above the opposite sides of the outer surfaces of the two pressing plates are provided with arc-shaped grooves. The bottom surface of the collection box is provided with a plurality of filter holes, and the diameter of the filter holes is much smaller than 4.75 mm. The collection box is placed above the two pressing plates. A limiting plate is installed on the upper end surface of the pressing plate. On both sides of the lower end surface of the collection box are provided with limiting grooves, and the limiting plates are snapped into the inner sides of the limiting grooves.

9. A production crushing device for preparing manufactured sand according to claim 1, characterized in that, Below the rear end of the inner wall of the U-shaped frame is installed a vertical plate. A plurality of positioning columns are installed on the lower end surface of the inclined plate. A plurality of positioning holes are provided on the upper end surface of the vertical plate, and the positioning columns are respectively snapped into the inner sides of the corresponding positioning holes. The U-shaped frame and the mounting plate are movably connected by bolts. The aperture of the sieve holes is smaller than 4.75 mm. A first handle is installed on the front end surface of the U-shaped frame. Clamping plates are installed on both sides of the outer surface of the U-shaped frame. On both sides of the inner wall of the transverse groove are provided with clamping grooves, and the clamping plates are snapped into the inner sides of the clamping grooves. A second handle is installed on the front end surface of the water tank.

10. The production and crushing device for preparing manufactured sand according to claim 1, characterized in that, One end of the water pump is connected to the water tank through a telescopic hose. A circulation pipe is installed outside the feeding mechanism. The water pump and the circulation pipe are connected through a first water pipe. The circulation pipe and the spray head are connected through a second water pipe. In front of the inside of the crushing box, two third rotating motors are installed through a motor cavity. The third rotating motors and the front end surfaces of the crushing rollers are fixedly connected through couplings. The rear end surfaces of the crushing rollers and the inner walls of the crushing boxes are rotatably connected through bearings.

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