CN113680502A

CN113680502A - Device for preparing reclaimed sand from waste concrete

Info

Publication number: CN113680502A
Application number: CN202110983907.4A
Authority: CN
Inventors: 林朝晖
Original assignee: Zhejiang Sanmen Yongtai Building Material Co ltd
Current assignee: Zhejiang Sanmen Yongtai Building Material Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-11-23

Abstract

The application relates to a device for preparing reclaimed sand from waste concrete, which comprises a crushing mechanism and a screening mechanism; the crushing mechanism comprises a supporting seat, a crushing chamber, a material guide plate and a plurality of crushing components; a feed inlet is formed in one end of the crushing chamber in the length direction, a discharge outlet is formed in the other end of the crushing chamber, a guide plate is fixed to the bottom of the discharge outlet, and the end, far away from the crushing chamber, of the guide plate is tilted upwards; the screening mechanism is arranged at the discharge port, and the crushing assembly comprises crushing blocks, a plurality of crushing lugs and a driving structure for driving the crushing lugs to impact the bottom plate of the crushing chamber; the crushing chamber is characterized by also comprising a water spray device, wherein the water spray device comprises a water pipe and a spray connected to one end of the water pipe, and the spray is arranged in the crushing chamber and arranged on one side close to the feed inlet; the water spray outlet is directed towards the inner bottom wall of the crushing chamber. The waste concrete is sprayed with moisture through spraying, so that dust is not easy to raise, workers are not easy to suck the dust into the bodies, and the health of the workers is guaranteed.

Description

Device for preparing reclaimed sand from waste concrete

Technical Field

The application relates to the technical field of concrete treatment, in particular to a device for preparing reclaimed sand from waste concrete.

Background

The price of natural sandstone is gradually increased due to the gradual reduction of the natural sandstone, so that the cost of the construction industry is gradually increased.

The waste concrete is generally concrete waste generated during building demolition, a large amount of waste concrete exists in China, and in order to reduce the volume of the waste concrete and reduce the building cost, the waste concrete is generally processed into reclaimed sand to be used as a raw material of a new building, so that the volume of building waste is reduced, waste is recycled, and the development concept of environmental protection is met. The device for preparing the reclaimed sand from the waste concrete is a device for crushing the concrete and then screening to obtain the reclaimed sand with the particle size similar to that of natural sand.

When the preparation facilities of reclaimed sand among the correlation technique is crushing the concrete, the dust that produces after the concrete is crushed is easily filled in the air, leads to the staff to inhale a large amount of dust easily in the lung, endangers staff's health.

Disclosure of Invention

Harm the healthy problem of staff in the air in order to improve the dust that produces when the concrete crushing easily to diffuse, this application provides a device for waste concrete preparation reclaimed sand.

The application provides a pair of device for waste concrete preparation reclaimed sand adopts following technical scheme:

a device for preparing reclaimed sand from waste concrete comprises a crushing mechanism and a screening mechanism; the crushing mechanism comprises a supporting seat, a crushing chamber, a material guide plate and a plurality of crushing assemblies; the crushing chamber is arranged on the supporting seat, one end of the crushing chamber in the length direction is provided with a feeding hole for waste concrete to enter, the other end of the crushing chamber is provided with a discharging hole, the material guide plate is fixed at the bottom of the discharging hole, and the end part of the material guide plate far away from the crushing chamber is tilted upwards; the screening mechanism is arranged at the discharge port and is used for screening the waste concrete crushed by the crushing mechanism;

the crushing assembly comprises a crushing block arranged in the crushing chamber in a sliding mode, a crushing lug fixed to the end, facing the bottom wall in the crushing chamber, of the crushing block and a driving structure for driving the crushing lug to impact the bottom plate of the crushing chamber;

the crushing chamber is characterized by also comprising a water spray device, wherein the water spray device comprises a water pipe and a spray connected to one end of the water pipe, and the spray is arranged in the crushing chamber and is arranged on one side close to the feed inlet; the water spray outlet is directed towards the inner bottom wall of the crushing chamber.

By adopting the technical scheme, the waste concrete enters the crushing chamber from the feeding hole through the guide plate, the driving structure drives the crushing lugs to impact the bottom wall in the crushing chamber, and the waste concrete is enabled to move towards the discharging hole through vibration; on the other hand, the concrete is moved in the crushing cavity in a vibration mode, so that the concrete can be displaced from the gaps of the crushing lugs, and the waste concrete blocks are convenient to displace;

the water spray device is used for spraying the concrete block with water, and tap is connected to the water pipe, sprays the play water through opening tap messenger, sprays spun water and is the water smoke form, can wet abandonment concrete block surface, makes the dust that produces in broken process, the difficult condition that the dust flies upward that appears to prevent that the dust from being inhaled by the staff, guarantee that the staff's is healthy.

Optionally, a guide rod is fixed on the bottom surface of the crushing chamber, a guide hole for the guide rod to pass through is formed in the top surface of the support seat, and the guide rod is slidably arranged in the guide hole; a supporting spring for supporting the crushing chamber is arranged between the outer bottom wall of the crushing chamber and the supporting seat; a fixing plate for fixing the screening mechanism is fixed at the bottom of the discharge port end of the crushing chamber; screening mechanism includes the coarse sieve board, the tip of coarse sieve board is fixed in on the fixed plate, the coarse sieve board is used for screening the abandonment concrete that drops from the discharge gate.

Through adopting above-mentioned technical scheme, the interior bottom of drive structure drive crushing lug striking crushing room produces the vibration, supports the crushing room through supporting spring and leads the crushing room through the guide bar for the vibration space increase of crushing room in vertical direction, thereby the vibration range of the crushing room is improved, makes the concrete piece conveniently take place the displacement in the crushing room. Fix the fixed plate on the crushing room to fix coarse screen board on the fixed plate, when making the crushing room vibration, fixed plate and coarse screen board all vibrate, can carry out vibration screening after dropping on coarse screen board from the abandonment concrete of discharge gate department, need not to increase the vibration of driving source drive coarse screen board, the energy saving.

Optionally, the screening mechanism further comprises a fine screening plate, the ends of the coarse screening plate and the fine screening plate are fixed to one side of the fixing plate, which is far away from the crushing chamber, and the fine screening plate is located below the coarse screening plate;

the screening mechanism further comprises a dust collection box for containing dust, and the dust collection box is located below the fine screening plate.

Through adopting above-mentioned technical scheme, the coarse screen board is used for sieving the concrete piece that is not totally crushed, and the fine screen board is used for sieving regeneration sand and dust. If the reclaimed sand contains a large amount of dust, the strength of concrete is easily reduced, and the strength of a building is poor, so that the dust is usually required to be removed. Because of guide bar and supporting spring's setting for it is great at fore-and-aft vibration range to crush the room, makes originally moist dust easily when screening because of vibrating by a wide margin dry, makes the dust fall into the collection ash case after being screened, can hold water in the collection ash case, makes the dust soaked in the aquatic, makes the difficult counterattack of dust.

Optionally, the coarse sieve plate and the fine sieve plate are both obliquely arranged, the coarse sieve plate is obliquely arranged at two ends of the crushing chamber in the width direction, and the oblique direction of the fine sieve plate is opposite to that of the coarse sieve plate.

Through adopting above-mentioned technical scheme, fine screen board and coarse screen board all incline to set up, and the direction of slope is opposite, makes the opposite direction of the discharge end on fine screen board and the coarse screen board, conveniently places the device that holds that is used for holding the material that fine screen board and coarse screen board screening obtained in both sides, and the material that conveniently obtains coarse screen board and fine screen board separately holds.

Optionally, the upwarping end fixing of coarse screening board has vertical mounting panel, be provided with on the mounting panel and weather the fan, weather the wind direction of fan towards fine screening board.

Through adopting above-mentioned technical scheme, the setting weathers the fan and carries out the drying to the last regeneration sand of smart sieve board, and the drying of dust accelerates on the one hand, makes the difficult adhesion regeneration sand surface of dust, and on the other hand conveniently blows in the dust collection incasement with the dust, prevents that the dust from kicking up and spreading to influence that the staff is healthy in the air.

Optionally, the coarse material conveying device further comprises a conveying mechanism for conveying coarse materials on the coarse screen plate back to the feeding hole, wherein the conveying mechanism comprises a base frame, a conveying chamber arranged on the base frame and a conveying assembly arranged in the conveying chamber;

the transportation assembly comprises two transportation wheels rotatably arranged at two ends of the transportation chamber in the length direction, a transportation belt wound on the two transportation wheels and a transportation device arranged on the transportation chamber and used for driving the transportation wheels to rotate;

the conveying chamber is positioned on one side of the coarse sieve plate, the two ends of the conveying chamber in the length direction are obliquely arranged, the top surface of the end part of the conveying chamber, which is obliquely inclined downwards, is provided with a circulating inlet, the end part of the coarse sieve plate, which is obliquely inclined downwards, faces the circulating inlet, and the conveying belt is positioned below the circulating inlet; the bottom of the upturned end of the transport chamber is provided with a circulating outlet, the two ends of the guide plate in the width direction of the crushing chamber are obliquely arranged, and the upturned end of the guide plate is positioned below the circulating outlet.

Through adopting above-mentioned technical scheme, abandonment concrete drops to in the circulation inlet from the end of having declined of coarse screen board to drop on the conveyer belt, conveyer drive transport wheel rotates, makes the conveyer belt with abandonment concrete transportation to circulation exit, and drops to the stock guide from circulation exit on, thereby makes the stock guide reenter the crushing indoor, need not the waste concrete transportation to the stock guide department on staff's the coarse screen board, reduces staff's work load.

Optionally, the transportation subassembly still includes that the interval is fixed in a plurality of transport boards that the transportation area deviates from transport wheel one side, and is a plurality of the length direction interval setting along the transportation area of transport board is a plurality of the length direction of transport board is the same with the width direction of transportation area, and is adjacent clearance between the transport board is used for holding the coarse fodder that the screening obtained on the coarse screen board.

Through adopting above-mentioned technical scheme, the abandonment concrete drops between adjacent transport plate, and the transport plate will abandonment concrete spacing, makes the abandonment concrete be difficult for because of the transportation area slope slides, places the one end that the abandonment concrete piles up having a down dip at the transport chamber.

Optionally, the dust collecting box comprises a box cover and a box body, the box cover comprises a cover frame and a plurality of breast boards, the plurality of breast boards are parallel to each other, and two ends of the plurality of breast boards are fixed on the inner wall of the cover frame; the end parts of the plurality of side plates in the width direction incline towards the direction far away from the blow drying fan.

Through adopting above-mentioned technical scheme, through the width direction slope of keeping away from the direction of weathering the fan with the breast board, make under the convenient circumstances that gets into the dust collection incasement of dust, the breast board can prevent to weather the fan and directly blow the dust of dust collection bottom of the case portion, makes the dust collection incasement not hold water, and the dust of dust collection incasement is difficult for also pounding.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the water spray device, dust generated in the process of crushing the waste concrete is not easy to be sucked by workers, so that the health of the workers is guaranteed;

2. by arranging the guide rod and the supporting spring, the vibration amplitude of the vibration crushing chamber is improved, so that the concrete block is convenient to displace in the crushing chamber;

3. through setting up the fan that weathers, the drying of dust is accelerated, and prevents that the dust from kicking up and filling up and influence the staff healthy in the air.

Drawings

FIG. 1 is a first schematic view of an apparatus for preparing reclaimed sand from waste concrete according to an embodiment of the present disclosure.

Fig. 2 is a second overall schematic view of the embodiment, which is mainly used for showing the position of the discharge hole.

Fig. 3 is a schematic view of the structure inside the crushing chamber of the embodiment, mainly used for showing the structure of the crushing assembly.

Fig. 4 is an exploded view of the sifting mechanism of the embodiment.

Fig. 5 is a schematic structural view of a transport mechanism of the embodiment.

Description of reference numerals: 1. a crushing mechanism; 2. a screening mechanism; 21. a coarse sieve plate; 211. a fixing plate; 212. a interception plate; 213. mounting a plate; 22. a fine sieve plate; 23. a dust collection box; 231. a box body; 232. a box cover; 2311. a breast board; 2312. a cover frame; 24. a sand storage tank; 26. drying the fan; 3. a supporting seat; 31. supporting legs; 32. a support plate; 321. a guide hole; 322. a guide bar; 323. a support spring; 4. a crushing chamber; 41. a feed inlet; 42. a discharge port; 5. a material guide plate; 51. a leak-proof plate; 6. a crushing assembly; 61. pressing the fragments; 62. crushing the bumps; 63. a drive structure; 631. an oil hydraulic cylinder; 632. a connecting frame; 6321. a drive rod; 6322. a connecting rod; 633. a sliding groove; 7. a water spray device; 71. a water pipe; 72. spraying; 711. a tube hole; 8. a transport mechanism; 81. a transport chamber; 811. a circulation inlet; 812. a recycle outlet; 82. a chassis; 83. a transport assembly; 831. a transport wheel; 832. a conveyor belt; 833. a transportation device; 8331. a transport motor; 834. a transport plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses device for waste concrete preparation reclaimed sand. Referring to fig. 1, the apparatus for preparing reclaimed sand from waste concrete includes a crushing mechanism 1 for crushing waste concrete and a sieving mechanism 2 for sieving the crushed waste concrete.

Referring to fig. 1, crushing mechanism 1 includes supporting seat 3, crushing room 4, stock guide 5 and a plurality of crushing subassembly 6 that are used for the crushing with abandonment concrete, supporting seat 3 includes a plurality of supporting legss 31 and the backup pad 32 that is fixed in a plurality of supporting legss 31 top surfaces, a plurality of guiding holes 321 have been seted up in the running through of backup pad 32 top surface, the one-to-one slides in the guiding hole 321 and is provided with guide bar 322, the top of guide bar 322 is fixed with the bottom surface of crushing room 4, the cover is equipped with supporting spring 323 on the guide bar 322, the top surface of supporting spring 323 one end fixed support board 32, the bottom surface of crushing room 4 is fixed to the other end.

Referring to fig. 1 and 2, the crushing chamber 4 is a rectangular parallelepiped, one end of the crushing chamber 4 in the length direction is provided with a feed port 41 for feeding the waste concrete, and the other end is provided with a discharge port 42 for discharging the crushed concrete.

Referring to fig. 2 and 3, a plurality of crushing assemblies 6 are arranged along the length of the crushing chamber 4, the crushing assemblies 6 including crushing blocks 61, crushing lugs 62 and a drive structure 63 for driving the crushing blocks to slide within the crushing chamber 4. The driving structure 63 includes an oil pressure cylinder 631 and a connecting frame 632, the connecting frame 632 includes two parallel driving rods 6321 and a connecting rod 6322 for fixing the ends of the two driving rods 6321 in the same length direction, the connecting rod 6322 is located at the top of the crushing chamber 4, and the two driving rods 6321 extend to two sides of the crushing chamber 4 in the width direction. A plurality of sliding grooves 633 have all been seted up to 4 width direction's of crushing room both sides, and crushing room 4 is parallel to each other with a plurality of sliding grooves 633 of one side, and crushing room 4 is the same with the length direction of a plurality of sliding grooves 633 of one side the same direction with crushing room 4. The two ends of the crushing block 61 are slidably arranged in the sliding groove 633, and the two ends of the crushing block 61 are fixedly connected with the ends of the two driving rods 6321 far away from the connecting rod 6322.

Referring to fig. 3, the sliding direction of the crushing block 61 is in a direction away from or close to the inner bottom wall of the crushing chamber 4, the oil pressure cylinder 631 fixes the middle portion of the connecting rod 6322, and the piston end of the oil pressure cylinder 631 is fixed to the top surface of the crushing chamber 4. A plurality of crushing lugs 62 are fixed at intervals to the end faces of the crushing blocks 61 facing the inner bottom wall of the crushing chamber 4, and the oil hydraulic cylinder 631 drives the crushing lugs 62 to strike the inner bottom wall of the crushing chamber 4.

Referring to fig. 1 and 3, the device for preparing reclaimed sand from waste concrete further comprises three water spray devices 7, and the three water spray devices 7 are fixed at one end of the crushing chamber 4 close to the feed inlet 41. The water spray device 7 comprises a water pipe 71 and a spray 72 connected with the end of the water pipe 71, the spray 72 is fixed on the inner wall of the crushing chamber 4, the side wall of the same side of the crushing chamber 4 is provided with three pipe holes 711 through which the water supply pipe 71 passes, and the three pipe holes 711 are correspondingly arranged between two adjacent sliding grooves 633 close to the feed inlet 41. The water pipe 71 is used for connecting a water tap, and after the water tap is turned on, water mist is sprayed 72 to moisten the waste concrete in the crushing chamber 4.

Referring to fig. 1 and 3, one end of the guide plate 5 is fixed to the inner bottom wall of the crushing chamber 4 at the feed port 41, the other end of the guide plate 5 extends toward one side in the width direction of the crushing chamber 4, and the end of the guide plate 5 away from the crushing chamber 4 is inclined upward. Leak-proof plates 51 for preventing the waste concrete from leaking from the sides of the guide plate 5 are fixed to both sides of the guide plate 5 in the width direction.

Referring to fig. 4, the screening mechanism 2 includes a coarse screen deck 21, a fine screen deck 22, and an ash collection box 23. The diapire that crushing room 4 is close to the tip of discharge gate 42 is fixed with fixed plate 211, and the length direction of fixed plate 211 is vertical direction, and the tip of coarse sieve board 21 and fine sieve board 22 is fixed in the one side that crushing room 4 was kept away from to fixed plate 211, and fine sieve board 22 is fixed in the below of coarse sieve board 21, and ash collection box 23 places subaerial, and ash collection box 23 is located the below of fine sieve board 22.

The coarse screen plate 21 is used for screening waste concrete falling from the discharge port 42, the fine screen plate 22 is used for screening reclaimed sand falling from the coarse screen plate 21, and the dust collection box 23 is used for collecting dust screened from the fine screen plate 22.

Referring to fig. 3 and 4, both ends of the coarse screen plate 21 in the same width direction as the crushing chamber 4 are inclined, the downward inclined end of the coarse screen plate 21 and the upward inclined end of the stock guide 5 face the same side in the width direction of the crushing chamber 4, and the inclination direction of the fine screen plate 22 is opposite to that of the coarse screen plate 21, that is, the upward inclined end of the fine screen plate 22 is close to the downward inclined end of the coarse screen plate 21.

Referring to fig. 4, a sand storage tank 24 for storing regenerated sand is disposed beside the dust box 23, and the downward inclined end of the fine screen plate 22 faces the sand storage tank 24.

Referring to fig. 3 and 4, the ends of the fine screen deck 22 and the coarse screen deck 21 remote from the crushing chamber are secured by the provision of a weir 212, the top end of the weir 212 extending to the top surface of the projecting coarse screen deck 21. The interception plates 212 are used to prevent the material on the fine screen deck 22 and the coarse screen deck 21 from leaking out in a direction away from the crushing chamber.

Referring to fig. 3 and 4, a vertical mounting plate 213 is fixed to the upturned end of the coarse sieve plate 21, the top end of the mounting plate 213 extends to the top surface of the protruding coarse sieve plate 21, the bottom end of the mounting plate 213 extends towards the downward inclined end of the fine sieve plate 22, and a gap for the reclaimed sand to enter the sand storage tank 24 is reserved between the bottom end of the mounting plate 213 and the downward inclined end of the fine sieve plate 22. The horizontal ends of the mounting plate 213 fix the plate surface of the fixing plate 211 and the ends of the interception plate 212, respectively.

Referring to fig. 4, a drying fan 26 is fixed to the mounting plate 213, the drying fan 26 is located between the coarse sieve plate 21 and the fine sieve plate 22, and an air outlet direction of the drying fan 26 faces the fine sieve plate 22.

Referring to fig. 4, the dust box 23 includes a box 231 and a box cover 232 fixed to the top of the box 231, the box cover 232 includes a cover frame 2312 and a plurality of bars 2311, the length directions of the bars 2311 are parallel to each other, and both ends of the bars 2311 in the length direction are fixed to two non-adjacent inner walls of the cover frame 2312. The widthwise ends of the plurality of fences 2311 are inclined away from the blow-drying fan 26. The plane of the box opening of the box 231 is parallel to the plane of the fine screen plate 22, and the distance between the box opening of the box 231 and the fine screen plate 22 is 3-15cm, so that the blow-drying fan 26 can blow dust into the box 231 conveniently.

Referring to fig. 3 and 5, the apparatus for preparing reclaimed sand from waste concrete further includes a transport mechanism 8 for transporting coarse materials on the coarse screen plate 21 back to the feed port 41. The transport mechanism 8 includes a transport room 81, a chassis 82 for supporting the transport room 81, and a transport assembly 83 provided in the transport room 81.

Referring to fig. 5, the base frame 82 is placed on one side of the width direction of the crushing chamber 4 where the downward inclined end of the screen plate 21 faces, the transport chamber 81 is a rectangular parallelepiped box, and the transport chamber 81 is fixed to the base frame 82.

Referring to fig. 5, the transporting assembly 83 includes two transporting wheels 831, a transporting belt 832 tensioned around the two transporting wheels 831, a transporting device 833 driving one of the transporting wheels 831 to rotate, and a plurality of transporting plates 834 fixed to the transporting belt 832. The two transport wheels 831 are rotatably connected to the inner walls of the two ends of the transport chamber 81 in the longitudinal direction, the transport device 833 is a transport motor 8331, the transport motor 8331 is fixed on the outer wall of the transport chamber 81, a motor shaft of the transport motor 8331 is coaxially fixed with one of the transport wheels 831, and two sides of the transport belt 832 in the width direction are in sliding contact with two side walls of the transport chamber 81.

Referring to fig. 5, the end of the transport plate 834 is fixed to a side of the transport belt 832 far from the transport wheels 831, the transport plates 834 are arranged in parallel and spaced apart from each other, the arrangement direction of the transport plates 834 is the same as the length direction of the transport belt 832, and both ends of the transport plates 834 in the length direction are in sliding contact with both side walls of the transport chamber 81. The gap between adjacent transport plates 834 is used for accommodating coarse materials obtained by screening on the coarse screen plate 21, so that the coarse materials are not easy to accumulate at the end of the transport chamber 81 which is inclined downwards.

Referring to fig. 5, two ends of the transportation chamber 81 in the length direction are obliquely arranged, a circulation inlet 811 is formed on the top surface of the downward inclined end of the transportation chamber 81, the downward inclined end of the coarse screen plate 21 faces the circulation inlet 811, and the circulation inlet 811 is used for allowing the materials on the coarse screen plate 21 to enter the transportation chamber 81. The bottom surface of the upturned end of the transport chamber 81 is provided with a circulating outlet 812, the guide plate 5 is positioned below the circulating outlet 812, and the circulating outlet 812 is used for dropping the materials in the transport chamber 81 on the guide plate 5, so that the materials are returned to the crushing chamber 4 for secondary crushing.

The implementation principle of the device for preparing reclaimed sand from waste concrete in the embodiment of the application is as follows: the waste concrete enters the feeding hole 41 from the guide plate 5, the plurality of oil hydraulic cylinders 631 drive the crushing lugs 62 to impact the inner bottom wall of the crushing chamber 4, and the expansion and contraction frequencies of the plurality of oil hydraulic cylinders 631 are not completely consistent. At this time, the whole crushing chamber 4 is vibrated so that the waste concrete can move toward the discharge port 42 by the vibration, and the water mist is sprayed 72 to wet the surface of the waste concrete during the crushing of the waste concrete by the crushing lugs 62, so that dust generated during the crushing is not easily raised.

The waste concrete drops on the coarse screen plate 21 after being crushed, the coarse screen plate 21 and the fine screen plate 22 are driven to vibrate by the vibration of the crushing chamber 4, and the particles with larger particle sizes drop into the circulating inlet 811 and are transported to the guide plate 5 again by the transporting assembly 83 for secondary crushing. The particles with proper particle size are the reclaimed sand, the reclaimed sand falls onto the fine screen plate 22, the blow-drying fan 26 blow-dries the surface of the reclaimed sand, so that the dust on the surface of the reclaimed sand falls into the dust collecting box 23, and the reclaimed sand falls into the sand storage tank 24 towards the inclined direction of the fine screen plate 22.

In conclusion, the waste concrete is sprayed with the water through the spraying device 72, so that dust is not easy to raise, workers are not easy to suck the dust into the bodies, and the health of the workers is guaranteed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A device for preparing reclaimed sand from waste concrete comprises a crushing mechanism (1) and a screening mechanism (2); the method is characterized in that: the crushing mechanism (1) comprises a supporting seat (3), a crushing chamber (4), a material guide plate (5) and a plurality of crushing assemblies (6); the crushing chamber (4) is arranged on the supporting seat (3), one end of the crushing chamber (4) in the length direction is provided with a feeding hole (41) for waste concrete to enter, the other end of the crushing chamber is provided with a discharging hole (42), the material guide plate (5) is fixed at the bottom of the discharging hole (42), and the end part of the material guide plate (5) far away from the crushing chamber (4) is tilted upwards; the screening mechanism (2) is arranged at the discharge port (42), and the screening mechanism (2) is used for screening the waste concrete crushed by the crushing mechanism (1);

the crushing assembly (6) comprises crushing blocks (61) which are arranged in the crushing chamber (4) in a sliding mode, a plurality of crushing lugs (62) which are fixed to the end portions, facing the inner bottom wall of the crushing chamber (4), of the crushing blocks (61) at intervals, and a driving structure (63) which drives the crushing lugs (62) to impact the bottom plate of the crushing chamber (4);

the crushing device is characterized by further comprising a water spray device (7), wherein the water spray device (7) comprises a water pipe (71) and a spray nozzle (72) connected to one end of the water pipe (71), and the spray nozzle (72) is arranged in the crushing chamber (4) and arranged on one side close to the feeding hole (41); the water outlet of the spray (72) is directed towards the inner bottom wall of the crushing chamber (4).

2. The apparatus as claimed in claim 1, wherein the apparatus comprises: a guide rod (322) is fixed on the bottom surface of the crushing chamber (4), a guide hole (321) for the guide rod (322) to pass through is formed in the top surface of the supporting seat (3), and the guide rod (322) is arranged in the guide hole (321) in a sliding manner; a supporting spring (323) for supporting the crushing chamber (4) is arranged between the outer bottom wall of the crushing chamber (4) and the supporting seat (3); a fixing plate (211) for fixing the screening mechanism (2) is fixed at the bottom of the discharge hole (42) end of the crushing chamber (4); screening mechanism (2) are including coarse sieve board (21), the tip of coarse sieve board (21) is fixed in on fixed plate (211), coarse sieve board (21) are used for the screening from the discarded concrete that discharge gate (42) dropped.

3. The apparatus as claimed in claim 2, wherein the apparatus comprises: the screening mechanism (2) further comprises a fine screening plate (22), the ends of the coarse screening plate (21) and the fine screening plate (22) are fixed on one side, away from the crushing chamber (4), of the fixing plate (211), and the fine screening plate (22) is located below the coarse screening plate (21);

screening mechanism (2) still include dust collection box (23) that is used for holding the dust, dust collection box (23) are located the below of fine screen board (22).

4. The apparatus as claimed in claim 3, wherein the apparatus comprises: coarse sieve board (21) and smart sieve board (22) all incline to set up, coarse sieve board (21) are located crushing room (4) width direction's both ends slope and set up, the incline direction of smart sieve board (22) is opposite with the incline direction of coarse sieve board (21).

5. The apparatus as claimed in claim 4, wherein the apparatus comprises: the tip that coarse screen board (21) upwarped is fixed with vertical mounting panel (213), be provided with on mounting panel (213) and weather fan (26), the wind direction of weather fan (26) is towards smart sieve board (22).

6. The apparatus as claimed in claim 4, wherein the apparatus comprises: the coarse material conveying device is characterized by further comprising a conveying mechanism (8) used for conveying coarse materials on the coarse screen plate (21) back to the feeding hole (41), wherein the conveying mechanism (8) comprises a base frame (82), a conveying chamber (81) arranged on the base frame (82) and a conveying assembly (83) arranged in the conveying chamber (81);

the conveying assembly (83) comprises two conveying wheels (831) rotatably arranged at two ends of the conveying chamber (81) in the length direction, a conveying belt (832) wound on the two conveying wheels (831), and a conveying device (833) arranged on the conveying chamber (81) and used for driving the conveying wheels (831) to rotate;

the transportation chamber (81) is positioned on one side of the coarse screen plate (21) which is inclined downwards, two ends of the transportation chamber (81) in the length direction are arranged in an inclined mode, a circulating inlet (811) is formed in the top surface of the end portion, inclined downwards, of the transportation chamber (81), the end portion, inclined downwards, of the coarse screen plate (21) faces the circulating inlet (811), and the transportation belt (832) is positioned below the circulating inlet (811); circulation export (812) have been seted up to the bottom of transport chamber (81) upturned tip, baffle (5) are located crushing room (4) width direction's both ends slope setting, the tip of baffle (5) upturned is located circulation export (812) below.

7. The apparatus as claimed in claim 6, wherein the apparatus comprises: the transportation assembly (83) further comprises a plurality of transportation plates (834) fixed on one side of the transportation belt (832) departing from the transportation wheel (831) at intervals, the transportation plates (834) are arranged at intervals along the length direction of the transportation belt (832), the transportation plates (834) are multiple, the length direction of the transportation plates (834) is the same as the width direction of the transportation belt (832), and gaps between the transportation plates (834) are used for containing coarse materials obtained by screening on the coarse screening plate (21).

8. The apparatus as claimed in claim 7, wherein the apparatus comprises: the dust collection box (23) comprises a box cover (232) and a box body (231), the box cover (232) comprises a cover frame (2312) and a plurality of breast boards (2311), the breast boards (2311) are parallel to each other, and two ends of the breast boards (2311) are fixed on the inner wall of the cover frame (2312); the end parts of the plurality of side plates (2311) in the width direction are inclined in the direction away from the blow drying fan (26).