CN114798134A

CN114798134A - Recycled concrete preparation raw material crushing equipment and method thereof

Info

Publication number: CN114798134A
Application number: CN202210394556.8A
Authority: CN
Inventors: 芮傲年; 桂清风
Original assignee: Anhui Rui'ao Concrete Co ltd
Current assignee: Anhui Rui'ao Concrete Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-07-29

Abstract

The invention discloses a device and a method for crushing raw materials for preparing recycled concrete, belonging to the technical field of recycled concrete production equipment, comprising a bottom plate, a plurality of supporting legs are fixedly arranged at the bottom of the bottom plate, a plurality of supporting rods are fixedly arranged at the top of the bottom plate, a hollow box is fixedly arranged at the top of the supporting rod, a qualified product collecting box is arranged at the top of the bottom plate, the qualified product collecting box is positioned under the hollow box, the top of the hollow box is provided with a pressing component, the drainage component is arranged on the inner wall of the top end of the hollow box, the concrete block is preliminarily crushed by the pressing component, meanwhile, the crushed concrete blocks are crushed by the crushing assembly, so that the phenomenon that the crushed concrete blocks do not meet the standard is greatly reduced, thereby can reduce the number of times of doing over again of concrete piece, solve current breaker and have the phenomenon that crushing efficiency is poor.

Description

Recycled concrete preparation raw material crushing equipment and method thereof

Technical Field

The invention relates to the technical field of recycled concrete production equipment, in particular to recycled concrete preparation raw material crushing equipment and a method thereof.

Background

Natural sand is a good building material, but for some areas, the demand for natural sand is large, the production amount of local natural sand is small, and the cost is greatly increased by transporting the natural sand remotely. In areas with large requirements for natural sandstone, generally, more waste concrete blocks are used, and the existing concrete block treatment method is basically burying. Large land resources are occupied. And is equivalent to multiple wastes. The regenerated concrete is prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed, cleaned and graded waste concrete blocks with a grading agent according to a certain proportion, partially or completely replacing natural aggregates (mainly coarse aggregates) such as sand stones and the like, and adding cement, water and the like. If the waste concrete blocks can be efficiently utilized to replace natural gravels to serve as building materials, the waste is simply changed into valuables for areas with large demands, and the waste is greatly reduced.

However, the crushing device used for processing the current recycled concrete generally has the phenomenon of poor crushing efficiency and the phenomenon of high labor intensity, and therefore, a recycled concrete preparation raw material crushing device and a method thereof are provided.

Disclosure of Invention

The present invention has been made in view of the above and/or other problems occurring in the prior art in a recycled concrete raw material crushing apparatus and method thereof.

Accordingly, an object of the present invention is to provide a recycled concrete-preparing raw material crushing apparatus and a method thereof, which can solve the above-mentioned problems of the prior art.

To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:

a raw material crushing device for recycled concrete preparation comprises a bottom plate, wherein a plurality of supporting legs are fixedly installed at the bottom of the bottom plate, a plurality of supporting rods are fixedly installed at the top of the bottom plate, a hollow box is fixedly installed at the top of each supporting rod, a qualified product collecting box is placed at the top of the bottom plate and is located right below the hollow box, a pressing assembly is installed at the top of the hollow box, a drainage assembly is installed on the inner wall of the top end of the hollow box and is located right below the pressing assembly, a crushing assembly is installed on the inner wall of the middle end of the hollow box, and a filtering assembly is installed on the inner wall of the bottom end of the hollow box;

a circulating assembly is arranged on one side of the top of the bottom plate and is positioned on one side of the filtering assembly;

the circulating assembly comprises a lifting assembly arranged on one side of the top of the bottom plate, a rotating assembly is arranged on the lifting assembly, an unqualified product collecting box is arranged on the rotating assembly, and the unqualified product collecting box is located on one side of the filtering assembly.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the pressing assembly comprises a connecting rod, a sliding block and a stress plate, the connecting rod is fixedly installed at both ends of the top of the hollow box, the fixing rods are fixedly installed at the top of the connecting rod, a supporting block is fixedly installed between the two groups of fixing rods, the inner wall of the supporting block is rotatably connected with a first screw rod through a bearing, a first nut is in threaded connection with the first screw rod, a first nut is fixedly installed on the inner wall of the sliding block, lifting rods are fixedly installed at both ends of the bottom of the sliding block, an extrusion plate is fixedly installed at the bottom of the lifting rods, and the extrusion plate is slidably connected to the inner wall of the hollow box;

a first box body is fixedly installed at the top of the supporting block, a first servo motor is fixedly installed on the inner wall of the first box body, and an output shaft of the first servo motor is fixedly connected with a first screw rod;

guide rods are fixedly arranged at two ends of the bottom of the supporting block, and the inner walls of two ends of the sliding block are connected with the guide rods in a sliding manner;

the top inner wall fixed mounting atress board of hollow box, a plurality of first filtration holes have been seted up to the inner wall of atress board.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the drainage assembly comprises a drainage plate which is fixedly installed on the inner wall of the hollow box, the drainage plate is shaped into a funnel shape, and a discharge hole is formed in the inner wall of the bottom end of the drainage plate.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the crushing assembly comprises a rotating shaft and a second box body, the inner walls of the two ends of the middle part of the hollow box are rotatably connected with the rotating shaft through bearings, a crushing roller is fixedly arranged on each rotating shaft, a gear is fixedly arranged at one end of each rotating shaft, and the two groups of gears are meshed and connected;

and a second box body is fixedly installed on one side of the hollow box, a second servo motor is fixedly installed on the inner wall of the second box body, and an output shaft of the second servo motor is fixedly connected with a group of rotating shafts.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the filter assembly comprises a filter plate and a discharging hole, the filter plate is fixedly installed on the inner wall of the bottom end of the hollow box, the filter plate is arranged in an inclined mode, the discharging hole is formed in one side of the bottom end of the hollow box, one end of the filter plate extends to the inner side of the discharging hole, one side of the discharging hole is provided with a defective product collecting box, and a plurality of second filtering holes are formed in the inner wall of the filter plate.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the lifting assembly comprises second screw rods, a second sliding block and a third box body, two ends of the top of the bottom plate are rotatably connected with the second screw rods through bearings, the two groups of second screw rods are in transmission connection through a transmission assembly, second nuts are in threaded connection with the second screw rods, the second nuts are fixedly installed on the inner walls of the second sliding blocks, and a rotating assembly is installed at one end of each second sliding block;

a third box body is fixedly installed on one side of the bottom plate, a third servo motor is fixedly installed on the inner wall of the third box body, and an output shaft of the third servo motor is fixedly connected with a group of second screw rods.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the transmission assembly comprises belt pulleys, each group of belt pulleys are fixedly installed at the top end of the second screw rod, and the belt pulleys are connected in a transmission mode through belts.

As a preferable aspect of the apparatus for pulverizing a raw material for recycled concrete production according to the present invention, wherein: the rotating assembly comprises a fourth box body and a rotating shaft, the second sliding block on the left side is fixedly provided with the fourth box body, the inner wall of the fourth box body is fixedly provided with a fourth servo motor, and an output shaft of the fourth servo motor is fixedly arranged on the left side of the unqualified product collecting box through a connecting rod;

the rotating shaft is rotatably connected to the right side of the unqualified product collecting box through a bearing, and the rotating shaft is fixedly installed on the second sliding block on the right side.

A method for crushing raw materials for preparing recycled concrete comprises the following specific steps:

s1, placing the concrete block on a stress plate, rotating a first screw rod through a first servo motor, so that a sliding block drives a squeezing plate on a lifting rod to lift under the action of a first nut, and thus, the concrete block on the stress plate is pressed in a reciprocating manner, and meanwhile, the stress plate is vibrated through a vibrating motor at the bottom of the stress plate, so that the concrete block which is in accordance with the size after being pressed flows into a drainage plate through a first filtering hole;

s2, when the pressed concrete block flows into the drainage plate, the concrete block flows into the space between the two groups of crushing rollers through the discharge hole;

s3, when the pressed concrete block flows between the two groups of crushing rollers, the second servo motor rotates the group of rotating shafts, and when the group of rotating shafts rotate, the two groups of crushing rollers move oppositely under the action of the gears, so that the concrete block is crushed;

s4, the crushed concrete block flows into the filter plate, if the crushed concrete block meets the final size, the crushed concrete block flows into the qualified product collecting box through the second filter hole, and if the crushed concrete block does not meet the final size, the crushed concrete block flows into the unqualified product collecting box through the discharging hole;

s5, when the concrete blocks in the unqualified product collection box reach a certain amount, the third servo motor rotates the second screw rods, the two second screw rods rotate under the action of the transmission assembly, the sliding block drives the unqualified product collection box to ascend through the rotating assembly under the action of the second nut until the height of the unqualified product collection box rises to a proper height, then the unqualified product collection box rotates by a certain angle through the fourth servo motor, and after the sliding block rotates, the concrete blocks in the unqualified product collection box are placed on the stress plate again under the operation of a worker until the concrete blocks meet the final size.

Compared with the prior art:

1. the crushing assembly is used for primarily crushing the concrete blocks, and meanwhile, the crushing assembly is used for crushing the crushed concrete blocks, so that the phenomenon that the crushed concrete blocks do not meet the standard is greatly reduced, the reworking times of the concrete blocks can be reduced, and the problem that the existing crushing device is poor in crushing efficiency is solved;

2. the crushed concrete blocks are filtered by the filtering assembly, so that the crushed concrete blocks have the phenomenon that the size of the crushed concrete blocks is kept almost, and the crushed concrete blocks have the function of facilitating later processing by keeping the size of the crushed concrete blocks almost;

3. the concrete blocks which do not meet the requirements are mechanically moved to the pressing component through the circulating component, so that the labor intensity is greatly reduced, and the labor cost is reduced through reducing the labor intensity.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is a schematic side view of the circulation assembly of the present invention;

FIG. 5 is an enlarged view of the structure at C of FIG. 4 according to the present invention;

FIG. 6 is a schematic top view of the size reduction assembly of the present invention;

FIG. 7 is a schematic view of the structure of the hollow case of the present invention.

In the figure: the device comprises a bottom plate 2, supporting legs 21, supporting rods 22, a hollow box 23, a qualified product collecting box 24, a pressing component 3, a connecting rod 31, a fixing rod 32, a supporting block 33, a guide rod 331, a first box 34, a first servo motor 341, a first screw 35, a first nut 351, a slide block 36, a lifting rod 361, a squeezing plate 362, a stress plate 37, a first filter hole 38, a drainage component 4, a drainage plate 41, a discharge hole 42, a crushing component 5, a rotating shaft 51, a crushing roller 52, a second box 53, a second servo motor 54, a gear 55, a filter component 6, a filter plate 61, a second filter hole 62, a blanking hole 63, a circulating component 7, a lifting component 8, a second screw 81, a second nut 82, a second slide block 83, a third box 84, a third servo motor 85, a transmission component 86, a belt pulley 861, a belt 862, a rotating component 87, a fourth box 871, a fourth servo motor, a rotating shaft 873, a first servo motor 341, a first screw 35, a first screw, a second screw, a third screw, a second screw, a third, And a defective product collection box 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The invention provides a raw material crushing device for recycled concrete preparation, and with reference to fig. 1-7, the device comprises a bottom plate 2, a plurality of support legs 21 are fixedly arranged at the bottom of the bottom plate 2, the support legs (21) are arranged into four groups, a plurality of support rods 22 are fixedly arranged at the top of the bottom plate 2, a hollow box 23 is fixedly arranged at the top of each support rod 22, a qualified product collecting box 24 is arranged at the top of the bottom plate 2, the qualified product collecting box 24 is positioned under the hollow box 23, a pressing component 3 is arranged at the top of the hollow box 23, a drainage component 4 is arranged on the inner wall at the top end of the hollow box 23, the drainage component 4 is positioned under the pressing component 3, a crushing component 5 is arranged on the inner wall at the middle end of the hollow box 23, a filtering component 6 is arranged on the inner wall at the bottom end of the hollow box 23, a circulating component 7 is arranged on one side of the top of the bottom plate 2, and the circulating component 7 is positioned on one side of the filtering component 6, the circulating assembly 7 comprises a lifting assembly 8 arranged on one side of the top of the bottom plate 2, a rotating assembly 87 is arranged on the lifting assembly 8, a defective product collecting box 9 is arranged on the rotating assembly 87, and the defective product collecting box 9 is positioned on one side of the filtering assembly 6.

The pressing component 3 comprises a connecting rod 31, a sliding block 36 and a stress plate 37, the connecting rod 31 is fixedly installed at both ends of the top of the hollow box 23, the fixing rod 32 is fixedly installed at the top of the connecting rod 31, a supporting block 33 is fixedly installed between the two groups of fixing rods 32, the inner wall of the supporting block 33 is rotatably connected with a first screw 35 through a bearing, a first nut 351 is connected on the first screw 35 in a threaded manner, the first nut 351 is fixedly installed at the inner wall of the sliding block 36, a lifting rod 361 is fixedly installed at both ends of the bottom of the sliding block 36, a squeezing plate 362 is fixedly installed at the bottom of the lifting rod 361 and is slidably connected on the inner wall of the hollow box 23, a first box 34 is fixedly installed at the top of the supporting block 33, a first servo motor 341 is fixedly installed on the inner wall of the first box 34, the output shaft of the first servo motor 341 is fixedly connected with the first screw 35, the first servo motor 341 has the function of positive and negative rotation, and guide rods 331 are fixedly installed at both ends of the bottom of the supporting block 33, the inner walls of the two ends of the sliding block 36 are connected with the guide rod 331 in a sliding mode, the sliding block 36 is prevented from rotating through the guide rod 331, the stress plate 37 is fixedly installed on the inner wall of the top end of the hollow box 23, a plurality of first filtering holes 38 are formed in the inner wall of the stress plate 37, the diameter of each first filtering hole 38 is larger than that of the corresponding second filtering hole 62, and a vibrating motor (not marked in the drawing) is fixedly installed on one side of the bottom of the stress plate 37.

Drainage subassembly 4 includes drainage plate 41, and drainage plate 41 fixed mounting is on the inner wall of hollow box 23, and drainage plate 41's shape sets to the infundibulate, and the relief hole 42 has been seted up to drainage plate 41's bottom inner wall.

Crushing unit 5 includes pivot 51 and second box 53, and the middle part both ends inner wall of hollow box 23 all rotates through the bearing and connects pivot 51, equal fixed mounting crushing roller 52 on every group pivot 51, the equal fixed mounting gear 55 of the one end of every group pivot 51, two sets of gears 55 meshing are connected, one side fixed mounting second box 53 of hollow box 23, the inner wall fixed mounting second servo motor 54 of second box 53, the output shaft and a set of pivot 51 fixed connection of second servo motor 54.

Filter assembly 6 includes filter 61 and unloading hole 63, and the bottom inner wall fixed mounting filter 61 of hollow box 23, and filter 61 are the slope form and arrange, and unloading hole 63 is opened to the bottom one side of hollow box 23, and the one end of filter 61 extends to the inboard of unloading hole 63, and one side of unloading hole 63 is equipped with the defective work and collects box 9, and a plurality of second filtration holes 62 have been seted up to filter 61's inner wall.

The lifting component 8 comprises a second screw 81, a second sliding block 83 and a third box 84, two ends of the top of the bottom plate 2 are rotatably connected with the second screw 81 through bearings, two groups of the second screws 81 are in transmission connection through a transmission component 86, a second nut 82 is in threaded connection with the second screw 81, a second nut 82 is fixedly installed on the inner wall of the second sliding block 83, a rotating component 87 is installed at one end of the second sliding block 83, a third box 84 is fixedly installed at one side of the bottom plate 2, a third servo motor 85 is fixedly installed on the inner wall of the third box 84, the third servo motor 85 has a positive and negative rotation function, the output shaft of the third servo motor 85 is fixedly connected with one group of the second screws 81, the transmission component 86 comprises belt pulleys 861, belt pulleys 861 are fixedly installed at the top end of each group of the second screws 81, the two groups of belt pulleys 861 are in transmission connection through a belt 862, the rotating component 87 comprises a fourth box 871 and a rotating shaft 873, fixed mounting fourth box 871 on left side second slider 83, the inner wall fixed mounting fourth servo motor 872 of fourth box 871, fourth servo motor 872 has the effect of just reversing, the output shaft of fourth servo motor 872 passes through connecting rod fixed mounting on the left side of unqualified product collection box 9, rotation axis 873 passes through the bearing and rotates the connection on the right side of unqualified product collection box 9, fixed mounting rotation axis 873 on right side second slider 83, have the effect of supporting unqualified product collection box 9 through pivot 873, fourth servo motor 872 coincides with the axle center of rotation axis 873.

s1, placing the concrete block on the stress plate 37, and rotating the first screw 35 through the first servo motor 341, so that the slide block 36 drives the extrusion plate 362 on the lifting rod 361 to lift under the action of the first nut 351, thereby pressing the concrete block on the stress plate 37 to and fro, and at the same time, vibrating the stress plate 37 through the vibrating motor at the bottom of the stress plate 37, so that the concrete block with the size after being pressed flows into the drainage plate 41 through the first filtering hole 38;

s2, when the pressed concrete block flows into the drainage plate 41, the concrete block flows into the space between the two groups of crushing rollers 52 through the discharge hole 42;

s3, when the pressed concrete block flows between the two groups of crushing rollers 52, the second servo motor 54 rotates the group of rotating shafts 51, and when the group of rotating shafts 51 rotate, the two groups of crushing rollers 52 move oppositely under the action of the gear 55, so that the concrete block is crushed;

s4, the crushed concrete block flows into the filter plate 61, if the crushed concrete block meets the final size, the crushed concrete block flows into the qualified product collecting box 24 through the second filter hole 62, and if the crushed concrete block does not meet the final size, the crushed concrete block flows into the unqualified product collecting box 9 through the blanking hole 63;

s5, when the concrete block in the unqualified product collection box 9 reaches a certain amount, the third servo motor 85 rotates the group of second screws 81, the two groups of second screws 81 rotate under the action of the transmission assembly 86, the sliding block 83 drives the unqualified product collection box 9 to ascend through the rotating assembly 87 under the action of the second nut 82 until the unqualified product collection box rises to a proper height, then the fourth servo motor 872 rotates the unqualified product collection box 9 for a certain angle, and after the rotation, the concrete block in the unqualified product collection box 9 is placed on the stress plate 37 again under the operation of a worker until the concrete block meets the final size.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A raw material crushing device for preparing recycled concrete comprises a bottom plate (2), wherein a plurality of supporting legs (21) are fixedly arranged at the bottom of the bottom plate (2), a plurality of support rods (22) are fixedly arranged at the top of the bottom plate (2), a hollow box (23) is fixedly arranged at the top of each support rod (22), the qualified product collecting box (24) is arranged at the top of the bottom plate (2), the qualified product collecting box (24) is positioned under the hollow box (23), it is characterized in that the top of the hollow box (23) is provided with a pressing component (3), a drainage component (4) is arranged on the inner wall of the top end of the hollow box (23), and the drainage component (4) is positioned right below the pressing component (3), the inner wall of the middle end of the hollow box (23) is provided with a crushing component (5), a filtering component (6) is arranged on the inner wall of the bottom end of the hollow box (23);

a circulating component (7) is installed on one side of the top of the bottom plate (2), and the circulating component (7) is located on one side of the filtering component (6);

the circulating assembly (7) comprises a lifting assembly (8) arranged on one side of the top of the bottom plate (2), a rotating assembly (87) is arranged on the lifting assembly (8), an unqualified product collecting box (9) is arranged on the rotating assembly (87), and the unqualified product collecting box (9) is positioned on one side of the filtering assembly (6).

2. The recycled concrete raw material crushing apparatus of claim 1, wherein the crushing apparatus comprises a crushing unit, the pressing component (3) comprises a connecting rod (31), a sliding block (36) and a stress plate (37), connecting rods (31) are fixedly arranged at two ends of the top of the hollow box (23), fixing rods (32) are fixedly arranged at the top of the connecting rods (31), a supporting block (33) is fixedly arranged between the two groups of fixing rods (32), the inner wall of the supporting block (33) is rotationally connected with a first screw rod (35) through a bearing, a first nut (351) is connected to the first screw rod (35) in a threaded manner, the first nut (351) is fixedly installed on the inner wall of the sliding block (36), lifting rods (361) are fixedly arranged at two ends of the bottom of the sliding block (36), an extrusion plate (362) is fixedly arranged at the bottom of each lifting rod (361), and the extrusion plate (362) is connected to the inner wall of the hollow box (23) in a sliding manner;

a first box body (34) is fixedly installed at the top of the supporting block (33), a first servo motor (341) is fixedly installed on the inner wall of the first box body (34), and an output shaft of the first servo motor (341) is fixedly connected with a first screw rod (35);

guide rods (331) are fixedly arranged at two ends of the bottom of the supporting block (33), and inner walls of two ends of the sliding block (36) are connected with the guide rods (331) in a sliding manner;

the top end inner wall fixed mounting atress board (37) of hollow box (23), a plurality of first filtration holes (38) have been seted up to the inner wall of atress board (37).

3. The recycled concrete preparation raw material crushing apparatus according to claim 1, wherein the drainage assembly (4) comprises a drainage plate (41), the drainage plate (41) is fixedly installed on the inner wall of the hollow box (23), the drainage plate (41) is shaped like a funnel, and a discharge hole (42) is formed in the inner wall of the bottom end of the drainage plate (41).

4. The recycled concrete raw material crushing device according to claim 1, wherein the crushing assembly (5) comprises a rotating shaft (51) and a second box body (53), the inner walls of the two ends of the middle part of the hollow box (23) are rotatably connected with the rotating shaft (51) through bearings, each group of rotating shaft (51) is fixedly provided with a crushing roller (52), one end of each group of rotating shaft (51) is fixedly provided with a gear (55), and the two groups of gears (55) are meshed and connected;

a second box body (53) is fixedly installed on one side of the hollow box (23), a second servo motor (54) is fixedly installed on the inner wall of the second box body (53), and an output shaft of the second servo motor (54) is fixedly connected with a group of rotating shafts (51).

5. The recycled concrete raw material crushing apparatus according to claim 1, wherein the filter assembly (6) comprises a filter plate (61) and a plurality of discharge holes (63), the filter plate (61) is fixedly installed on the inner wall of the bottom end of the hollow box (23), the filter plate (61) is arranged in an inclined manner, the discharge holes (63) are formed in one side of the bottom end of the hollow box (23), one end of the filter plate (61) extends to the inner side of the discharge holes (63), the defective product collecting box (9) is arranged on one side of the discharge holes (63), and the plurality of second filter holes (62) are formed in the inner wall of the filter plate (61).

6. The recycled concrete preparation raw material crushing device according to claim 1, wherein the lifting assembly (8) comprises a second screw (81), a second sliding block (83) and a third box body (84), two ends of the top of the bottom plate (2) are rotatably connected with the second screw (81) through bearings, two groups of the second screws (81) are in transmission connection through a transmission assembly (86), the second screw (81) is in threaded connection with a second nut (82), the second nut (82) is fixedly installed on the inner wall of the second sliding block (83), and one end of the second sliding block (83) is provided with a rotating assembly (87);

a third box body (84) is fixedly installed on one side of the bottom plate (2), a third servo motor (85) is fixedly installed on the inner wall of the third box body (84), and an output shaft of the third servo motor (85) is fixedly connected with a group of second screw rods (81).

7. The recycled concrete preparation raw material crushing apparatus according to claim 6, characterized in that the transmission assembly (86) comprises pulleys (861), the top end of each set of the second screw (81) is fixedly provided with a pulley (861), and the two sets of pulleys (861) are in transmission connection through a belt (862).

8. The recycled concrete preparation raw material crushing device according to claim 6, wherein the rotating assembly (87) comprises a fourth box body (871) and a rotating shaft (873), the second slider (83) on the left side is fixedly provided with the fourth box body (871), the inner wall of the fourth box body (871) is fixedly provided with a fourth servo motor (872), and the output shaft of the fourth servo motor (872) is fixedly arranged on the left side of the unqualified product collection box (9) through a connecting rod;

the rotating shaft (873) is rotatably connected to the right side of the unqualified product collecting box (9) through a bearing, and the rotating shaft (873) is fixedly installed on the second sliding block (83) on the right side.

9. The method for crushing raw materials for preparing recycled concrete is characterized by comprising the following specific steps of:

s1, placing concrete blocks on the stress plate (37), rotating the first screw (35) through the first servo motor (341), so that the sliding block (36) drives the extrusion plate (362) on the lifting rod (361) to lift under the action of the first nut (351), and reciprocating pressing the concrete blocks on the stress plate (37), and meanwhile, vibrating the stress plate (37) through the vibrating motor at the bottom of the stress plate (37), so that the concrete blocks which meet the size after being pressed flow into the drainage plate (41) through the first filtering hole (38);

s2, when the pressed concrete block flows into the drainage plate (41), the concrete block flows into the space between the two groups of crushing rollers (52) through the discharge hole (42);

s3, when the pressed concrete block flows between the two groups of crushing rollers (52), the second servo motor (54) rotates the group of rotating shafts (51), and when the group of rotating shafts (51) rotate, the two groups of crushing rollers (52) move oppositely under the action of the gear (55), so that the concrete block is crushed;

s4, the crushed concrete block flows into the filter plate (61), if the crushed concrete block meets the final size, the crushed concrete block flows into the qualified product collecting box (24) through the second filter hole (62), and if the crushed concrete block does not meet the final size, the crushed concrete block flows into the unqualified product collecting box (9) through the blanking hole (63);

s5, when the concrete blocks in the unqualified product collection box (9) reach a certain amount, the third servo motor (85) rotates the group of second screw rods (81), the two groups of second screw rods (81) rotate under the action of the transmission assembly (86), the sliding block (83) drives the unqualified product collection box (9) to ascend through the rotating assembly (87) under the action of the second nut (82) until the unqualified product collection box rises to a proper height, the fourth servo motor (872) rotates the unqualified product collection box (9) at a certain angle, and after rotation, the concrete blocks in the unqualified product collection box (9) are placed on the stress plate (37) again under the operation of a worker until the concrete blocks meet the final size.