Concrete recycling and crushing device based on urban building waste cyclic utilization

Abstract

The invention relates to the technical field of concrete waste recycling, and discloses a concrete recycling and crushing device based on urban building waste cyclic utilization, the concrete recycling and crushing device comprises a treatment box assembly, the top of the inner side of the treatment box assembly is provided with a crushing assembly, the treatment box assembly comprises a box body, and screening outlets are formed in the two sides of the box body; a magnetic separator is installed at the bottom of the treatment box assembly, a collecting box is connected to the bottom of the treatment box assembly, a screening mechanism is arranged on the inner side of the treatment box assembly, the crushing assembly crushes concrete waste, and the crushing assembly drives the screening mechanism to conduct step-by-step vibration screening on the crushed concrete waste during operation. And large-volume crushed concrete waste is discharged from the screening outlet, and small-volume crushed concrete waste enters the collecting box after being screened step by step.

Description

Technical Field

[0001] The invention relates to the technical field of concrete waste recycling, in particular to a concrete recycling and crushing device based on the recycling of urban construction waste. Background Art

[0002] With the acceleration of urbanization, a large number of buildings have been demolished and the amount of construction waste generated has increased. In recent years, people have gradually realized the importance of resource utilization of construction waste and have developed a variety of construction waste recycling technologies. The current mainstream recycling method is to use large crushers to crush concrete waste into smaller particles, which are then further screened and used for road base materials or recycled aggregates to reuse concrete waste.

[0003] In the concrete crushing and recycling process, crushed concrete waste of different particle sizes are separated through multi-layer vibrating screens. The existing vibrating screens make the crushed concrete waste jump on the top of the vibrating screen through vibration, avoiding large-volume crushed concrete waste from blocking the screen holes, thereby promoting the smaller volume of crushed concrete waste to fall. However, after this type of vibrating screen has been screening for a period of time, too much large-volume crushed concrete waste will accumulate on the top of the screening net, and the vibration screening efficiency will gradually decrease, and the crushing time cost needs to be further reduced.

[0004] To this end, the present invention provides a concrete recycling and crushing device based on the recycling of urban construction waste. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides a concrete recycling and crushing device based on the recycling of urban construction waste, comprising a processing box assembly, a crushing assembly is installed on the top of the inner side of the processing box assembly, the processing box assembly comprises a box body, screening outlets are opened on both sides of the box body, a magnetic separator is installed at the bottom of the processing box assembly, a collecting box is connected to the bottom of the processing box assembly, a screening mechanism is arranged on the inner side of the processing box assembly, the crushing assembly crushes concrete waste, and when the crushing assembly is in operation, the screening mechanism is driven to perform step-by-step vibration screening on the crushed concrete waste, large-volume crushed concrete waste is discharged from the screening outlet, and small-volume crushed concrete waste enters the collecting box after being screened step by step.

[0007] Furthermore, a feed funnel is fixedly connected to the top of the box body, and the crushing assembly includes a driven gear and a driving gear. The teeth of the driven gear are meshed with the teeth of the driving gear. The backs of the driven gear and the driving gear are fixedly connected to crushing rollers, and the front of the driving gear is fixedly connected to a motor. Both sides of the top of the inner side of the box body are rotatably connected to the crushing rollers.

[0008] Furthermore, the screening mechanism includes two groups of drive components, and three groups of screen plate components are equidistantly arranged between the two drive components. The sub-screen plate components are sloped as a whole, and the inclination directions of the two adjacent groups of sub-screen plate components are opposite. Fixed components are arranged on both sides of each group of sub-screen plate components.

[0009] The sloped screen plate assembly makes it easier to discharge large-volume crushed concrete waste that does not pass the screening standard.

[0010] Furthermore, the sub-screen plate assembly includes a central axis, a straight sub-screen plate is fixedly connected to one side of the central axis, and an inclined sub-screen plate is fixedly connected to the other side of the central axis, the straight sub-screen plate is parallel to the horizontal direction, the inclined sub-screen plate is inclined, and there are three screening outlets, which are respectively located on the top of the straight sub-screen plates.

[0011] Furthermore, the driving assembly includes a fixed bracket, the top of the fixed bracket is rotatably connected to the second connecting rod, the top of the second connecting rod is rotatably connected to the first connecting rod, the center of the front side of the driven gear is fixedly connected to the central rotating shaft, the top of the first connecting rod is fixedly connected to the front side of the central rotating shaft, the front and back sides of the central axis are fixedly connected to fixed round blocks, the fixed round blocks are fixedly connected to one side of the fixed bracket close to the sub-screen plate assembly, and the front and back sides of the box body are provided with limiting holes that match the clearance of the outer diameter of the fixed round blocks.

[0012] The straight screen plate and the inclined screen plate rotate up and down to achieve screening vibration. Compared with the vibration generated by the up and down movement of the straight screen plate and the vibration achieved by flipping up and down, the vibration intensity is higher.

[0013] Furthermore, the fixing assembly includes a fixing plate, the front and back surfaces of the fixing plate close to the central axis are fixedly connected with convex clamping blocks, the front surface of the fixing plate away from the central axis is fixedly connected with a fixing shaft, and the front and back surfaces of the fixing shaft are rotatably connected to the inner wall of the box body.

[0014] Furthermore, the straight sub-screen plate and the inclined sub-screen plate are provided with square grooves on one side away from the central axis to match the clearance of the fixed plate, and the front and back sides of the square grooves are provided with limiting grooves.

[0015] The fixed components are extended and retracted to adapt to the rotation of the straight sub-screen plates and the inclined sub-screen plates.

[0016] Furthermore, the inner sides of the straight sub-screen plate and the inclined sub-screen plate located at the bottom are provided with adjustment components, and the adjustment components include an inner sieve plate. The front sides of the straight sub-screen plate and the inclined sub-screen plate located at the bottom are provided with mounting grooves that match the width gap of the inner sieve plate, and an electric push rod is fixedly connected to the side of the inner sieve plate close to the central axis.

[0017] According to the different road base material requirements of the final screening criteria, the specified volume of materials is screened out.

[0018] Furthermore, a guide plate is provided below the crushing roller, a mounting shaft is fixedly connected to one side of the guide plate, the front and back sides of the mounting shaft are rotatably connected to the inner wall of the box, a torsion spring is provided on the outer side of the mounting shaft, and both ends of the torsion spring are fixedly connected to the outer side of the mounting shaft and the inner wall of the box, respectively.

[0019] The guide plate can guide the concrete waste after being crushed by the crushing roller, and flatten the waste when contacting the top of the inclined sub-screen plate to prevent the waste from sticking to the top of the inclined sub-screen plate.

[0020] The beneficial effects of the present invention are: 1. The present invention is provided with a sub-screening plate assembly that cooperates with the screening outlet. The sub-screening plate assembly is sloped, which makes it easier to discharge large-volume crushed concrete waste that does not pass the screening standard. The crushed concrete waste falls on the top of the inclined sub-screening plate and can slide along the slope of the inclined sub-screening plate to the top of the straight sub-screening plate and then be discharged through the screening outlet, thereby avoiding the accumulation of large-volume crushed concrete waste on the top of the sub-screening plate assembly.

[0021] 2. The present invention is provided with a crushing component, a driving component and a sub-screening plate component which cooperate with each other. The operation of the crushing component drives the sub-screening plate component to flip up and down through the driving component. Compared with the up and down movement vibration and up and down flipping of the straight screening plate, the vibration intensity is higher, which further separates the large-volume crushed concrete waste and the small-volume crushed concrete waste, thereby improving the screening efficiency.

[0022] 3. The present invention provides an adjustment component on the inner side of the sub-screening plate component at the bottom, and adjusts the screening mesh number of the sub-screening plate component at the bottom according to different road substrate requirements to screen out road substrates with different final screening standards, thereby expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the overall cross section of the present invention; Figure 3 yes Figure 2 A partial enlarged view of the middle part; Figure 4 It is a schematic diagram of the cross-sectional structure of the sub-screen plate assembly in the present invention; Figure 5 yes Figure 4 A partial enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the cross-sectional structure of the screening mechanism of the present invention; Figure 7 yes Figure 6 A partial enlarged view of point C in the middle.

[0024] Description of reference numerals: 1. Processing box assembly; 101. Feeding funnel; 102. Box body; 103. Screening outlet; 104. Limiting hole; 2. Crushing assembly; 201. Crushing roller; 202. Driven gear; 203. Driving gear; 204. Motor; 3. Screening mechanism; 301. Screening plate assembly; 3011. Straight screening plate; 3012. Middle shaft; 3013. Fixed round block; 3014. Inclined screening plate; 3015. Limiting Position slot; 302, fixing assembly; 3021, fixing plate; 3022, convex block; 3023, fixing shaft; 303, adjusting assembly; 3031, inner screen plate; 3032, electric push rod; 304, driving assembly; 3041, fixing bracket; 3042, second connecting rod; 3043, first connecting rod; 3044, central rotating shaft; 305, guide plate; 306, mounting shaft; 4, magnetic separator; 5, collecting box. DETAILED DESCRIPTION

[0025] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0026] like Figures 1 to 7 As shown in the embodiment of the present invention, a concrete recycling and crushing device based on the recycling of urban construction waste is provided. Figure 1 , Figure 2, including a processing box assembly 1, a crushing assembly 2 is installed on the top of the inner side of the processing box assembly 1, the processing box assembly 1 includes a box body 102, screening outlets 103 are opened on both sides of the box body 102, a magnetic separator 4 is installed at the bottom of the processing box assembly 1, a collecting box 5 is connected to the bottom of the processing box assembly 1, and a screening mechanism 3 is arranged on the inner side of the processing box assembly 1. The crushing assembly 2 crushes the concrete waste. When the crushing assembly 2 is running, it drives the screening mechanism 3 to perform step-by-step vibration screening on the crushed concrete waste. The large-volume crushed concrete waste is discharged from the screening outlet 103, and the small-volume crushed concrete waste enters the collecting box 5 after step-by-step screening.

[0027] Please refer to Figure 2 , Figure 3 The top of the box body 102 is fixedly connected with a feed hopper 101, the crushing assembly 2 includes a crushing roller 201 and a driving gear 203, the teeth of the crushing roller 201 are meshed with the teeth of the driving gear 203, the backs of the driven gear 202 and the driving gear 203 are fixedly connected with the crushing roller 201, the front of the driving gear 203 is fixedly connected with a motor 204, and the two sides of the inner top of the box body 102 are rotatably connected with the crushing roller 201.

[0028] Specifically, the output shaft of the motor 204 is fixedly connected to the driving gear 203, and the output shaft of the motor 204 is rotatably connected to the box body 102 through a bearing. The top opening of the feed hopper 101 is larger than the bottom opening, which is convenient for inputting more crushed concrete waste and the bottom can be accurately transmitted to the top of the crushing component 2. The two crushing rollers 201 crush the concrete waste, and then the crushed waste falls on the top of the screening mechanism 3.

[0029] Please refer to Figure 2 The screening mechanism 3 includes two groups of driving components 304, and three components of sieve plate components 301 are equidistantly arranged between the two driving components 304. The sieve plate components 301 are generally sloped, and the inclination directions of two adjacent components of sieve plate components 301 are opposite. Fixed components 302 are arranged on both sides of each component of the sieve plate component 301.

[0030] Specifically, the screening mesh numbers of the three sub-screening plate assemblies 301 gradually increase, that is, the aperture gradually decreases, and smaller volumes of crushed concrete waste are screened out step by step. The sloped sub-screening plate assembly 301 is more convenient for discharging large volumes of crushed concrete waste that does not pass the screening standard.

[0031] Please refer to Figure 2 , Figure 4The sub-screen plate assembly 301 includes a central axis 3012, one side of the central axis 3012 is fixedly connected with a straight sub-screen plate 3011, the other side of the central axis 3012 is fixedly connected with an inclined sub-screen plate 3014, the straight sub-screen plate 3011 is parallel to the horizontal direction, the inclined sub-screen plate 3014 is inclined, there are three screening outlets 103, and the screening outlets 103 are respectively located at the top of the straight sub-screen plates 3011.

[0032] Specifically, the crushed concrete waste falls on the top of the inclined sub-screen plate 3014 and can slide along the slope of the inclined sub-screen plate 3014 to the top of the straight sub-screen plate 3011 and then be discharged through the screening outlet 103. The straight sub-screen plate 3011 and the inclined sub-screen plate 3014 in the same component screen plate assembly 301 have the same mesh size.

[0033] Please refer to Figure 2 , Figure 3 , Figure 4 The driving assembly 304 includes a fixed bracket 3041, the top of the fixed bracket 3041 is rotatably connected to the second connecting rod 3042, the top of the second connecting rod 3042 is rotatably connected to the first connecting rod 3043, the center of the front side of the driven gear 202 is fixedly connected to the central rotating shaft 3044, the top of the first connecting rod 3043 is fixedly connected to the front side of the central rotating shaft 3044, the front and back sides of the central axis 3012 are fixedly connected to the fixed round block 3013, the fixed round block 3013 is fixedly connected to the side of the fixed bracket 3041 close to the sub-screen plate assembly 301, and the front and back sides of the box body 102 are provided with limiting holes 104 that match the outer diameter clearance of the fixed round block 3013.

[0034] Specifically, the starting motor 204 drives the driving gear 203 to rotate. Since the driving gear 203 and the driven gear 202 are meshed with each other, the driven gear 202 and the driving gear 203 rotate synchronously and in opposite directions. That is, at this time, the crushing rollers 201 on both sides also rotate synchronously and in opposite directions to crush the concrete waste. Since the center of the central rotating shaft 3044 and the driven gear 202 are the same, when the driven gear 202 rotates, it drives the bottom of the first connecting rod 3043 to make a circular motion with the driven gear 202 as the center and the distance from the connection between the first connecting rod 3043 and the second connecting rod 3042 to the center of the central rotating shaft 3044 as the radius, thereby driving the top of the second connecting rod 3042 to move synchronously, and the length of the second connecting rod 3042 is fixed, wherein the fixed bracket 3041 is fixedly connected to the fixed round block 3013, and the fixed round block 3014 is fixedly connected to the fixed round block 3015. 013 is limited by the limiting hole 104, so the fixed bracket 3041 can only move up and down under the traction of the second connecting rod 3042, thereby driving the three fixed round blocks 3013 and the central axis 3012 to move up and down. When the central axis 3012 moves up and down, the connection between the central axis 3012 and the straight sub-screen plate 3011 and the connection between the central axis 3012 and the inclined sub-screen plate 3014 all move up and down accordingly, that is, the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 are driven to rotate up and down to achieve screening vibration; Since the up and down angle flipping will increase the jumping path of the crushed concrete waste on the top of the sub-screen plate assembly 301, the large-volume crushed concrete waste and the small-volume crushed concrete waste are further separated. Compared with the vibration generated by the up and down movement of the straight screening plate and the vibration achieved by the up and down angle flipping, the vibration intensity is higher, so that the small-volume crushed concrete waste quickly falls to the lower sub-screen plate assembly 301, and the large-volume crushed concrete waste is discharged from the screening outlet 103 during the vibration process when the straight sub-screen plate 3011 tilts from a horizontal parallel state to a direction toward the screening outlet 103, thereby avoiding the accumulation of large-volume crushed concrete waste on the top of the sub-screen plate assembly 301 and ensuring the stability of the screening efficiency during long-term crushing work.

[0035] Please refer to Figure 4 , Figure 5 The fixing assembly 302 includes a fixing plate 3021, and the front and back sides of the fixing plate 3021 close to the central axis 3012 are fixedly connected with a convex block 3022, and the front side of the fixing plate 3021 away from the central axis 3012 is fixedly connected with a fixing shaft 3023, and the front and back sides of the fixing shaft 3023 are rotatably connected to the inner wall of the box body 102.

[0036] Please refer to Figure 5 A square groove which matches the clearance of the fixed plate 3021 is formed on the side of the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 away from the central axis 3012, and a limiting groove 3015 is formed on the front and back sides of the square groove.

[0037] Specifically, in the initial state, the flat sub-sieve plate 3011 is as follows Figure 2As shown, when the fixed bracket 3041 moves with the crushing assembly 2, the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 are angularly offset relative to the initial state, and the fixed plate 3021 moves along the limiting groove 3015 through the convex block 3022 to the side of the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 away from the central axis 3012 to adapt to the rotation of the straight sub-screen plate 3011 and the inclined sub-screen plate 3014.

[0038] Please refer to Figure 2 , Figure 6 , Figure 7 An adjustment component 303 is provided on the inner side of the straight sub-sieve plate 3011 and the inclined sub-sieve plate 3014 at the bottom. The adjustment component 303 includes an inner sieve plate 3031. The front sides of the straight sub-sieve plate 3011 and the inclined sub-sieve plate 3014 at the bottom are provided with mounting grooves that match the width gap of the inner sieve plate 3031. An electric push rod 3032 is fixedly connected to the side of the inner sieve plate 3031 close to the central axis 3012.

[0039] Specifically, the inner sieve plate 3031 has the same mesh number as the straight sub-sieve plate 3011 and the inclined sub-sieve plate 3014 located at the bottom, and in the initial state, Figure 7 As shown, the sieve holes on the surface of the inner sieve plate 3031 are completely connected with the sieve holes on the surface of the straight sub-sieve plate 3011 and the inclined sub-sieve plate 3014. When the electric push rod 3032 is started so that the output shaft of the electric push rod 3032 pushes the inner sieve plate 3031 and the straight sub-sieve plate 3011 and the inclined sub-sieve plate 3014 to cause relative displacement, the screening mesh number of the bottom sub-sieve plate assembly 301 can be adjusted to adapt to road substrates with different final screening standards.

[0040] Please refer to Figure 2 , Figure 3 A guide plate 305 is provided below the crushing roller 201, and a mounting shaft 306 is fixedly connected to one side of the guide plate 305. The front and back sides of the mounting shaft 306 are rotatably connected to the inner wall of the box body 102. A torsion spring is provided on the outer side of the mounting shaft 306, and the two ends of the torsion spring are fixedly connected to the outer side of the mounting shaft 306 and the inner wall of the box body 102 respectively.

[0041] Specifically, since the crushed concrete will fall from the middle of the two crushing rollers 201, it will hit the top of the guide plate 305 when falling, causing the guide plate 305 to tilt toward the side of the inclined sub-screen plate 3014, and the crushed concrete will fall along the guide plate 305 to the top of the inclined sub-screen plate 3014, playing a guiding role, so that the crushed concrete is fully in contact with the inclined sub-screen plate 3014 and the crushed concrete is screened; at the same time, the driving component 304 drives the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 to be moved to the top of the inclined sub-screen plate 3014, and the crushed concrete is screened. When the sieve plate 3014 rotates for screening, the guide plate 305 will scrape and spread the concrete material on the top of the straight sieve plate 3011 and the inclined sieve plate 3014 when in contact with the straight sieve plate 3011 and the inclined sieve plate 3014, so that the concrete can be screened more evenly on the top of the straight sieve plate 3011 and the inclined sieve plate 3014, and the guide plate 305 is relatively flexible in rotation angle under the action of the torsion spring, and will not hinder the normal rotation of the straight sieve plate 3011 and the inclined sieve plate 3014.

[0042] How it works Before concrete crushing, according to the road substrate requirements of different final screening standards, when the electric push rod 3032 is started, the output shaft of the electric push rod 3032 pushes the inner screen plate 3031 and the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 to move relative to each other synchronously and equidistantly, so as to adjust the screening mesh number of the bottom sub-screen plate assembly 301; When crushing concrete, first put the concrete waste into the feeding hopper 101. The top opening of the feeding hopper 101 is larger than the bottom opening, so that more crushed concrete waste can be put in and the bottom can be accurately transmitted to the top of the crushing assembly 2. The motor 204 is started to drive the driving gear 203 to rotate. Since the driving gear 203 and the driven gear 202 are meshed with each other, the driven gear 202 and the driving gear 203 rotate synchronously and in opposite directions. That is, at this time, the crushing rollers 201 on both sides also rotate synchronously and in opposite directions to crush the concrete waste. Since the center of the central rotating shaft 3044 and the driven gear 202 are the same, when the driven gear 202 rotates, it drives the bottom of the first connecting rod 3043 to make a circular motion with the driven gear 202 as the center and the distance from the connection between the first connecting rod 3043 and the second connecting rod 3042 to the center of the central rotating shaft 3044 as the radius, thereby driving the top of the second connecting rod 3042 to move synchronously, and the length of the second connecting rod 3042 is fixed, wherein the fixed bracket 3041 is fixedly connected to the fixed round block 3013, and the fixed round block 3013 is limited by the limiting hole 104, so the fixed bracket 3041 can only move up and down under the traction of the second connecting rod 3042, thereby driving the three fixed round blocks 3013 and the central connecting rod 3042 to move up and down. The shaft 3012 moves up and down. When the middle shaft 3012 moves up and down, the connection between the middle shaft 3012 and the straight sub-screen plate 3011 and the connection between the middle shaft 3012 and the inclined sub-screen plate 3014 move up and down accordingly, that is, the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 are driven to rotate up and down. At this time, the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 are offset in angle relative to the initial state. The fixed plate 3021 moves along the inclined sub-screen plate 3014 through the convex block 3022 and telescopes on the side of the straight sub-screen plate 3011 and the inclined sub-screen plate 3014 away from the middle shaft 3012 to adapt to the rotation of the straight sub-screen plate 3011 and the inclined sub-screen plate 3014. The straight sub-screen plate 3011 and the inclined sub-screen plate 3014 rotate up and down to realize screening vibration, so that the small-volume crushed concrete waste quickly falls to the lower sub-screen plate assembly 301, and the large-volume crushed concrete waste is discharged from the screening outlet 103 during the vibration process when the straight sub-screen plate 3011 tilts from a horizontal parallel state to the screening outlet 103. Finally, the small-volume crushed concrete waste that meets the requirements of the road substrate falls into the collection box 5 for collection and standby use.

[0043] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A concrete recycling and crushing device based on the recycling of urban construction waste, comprising a processing box assembly (1), a crushing assembly (2) is installed on the top of the inner side of the processing box assembly (1), characterized in that: The processing box assembly (1) comprises a box body (102), screening outlets (103) are provided on both sides of the box body (102), a magnetic separator (4) is installed at the bottom of the processing box assembly (1), a collecting box (5) is connected to the bottom of the processing box assembly (1), a screening mechanism (3) is arranged inside the processing box assembly (1), the crushing assembly (2) crushes the concrete waste, and when the crushing assembly (2) is in operation, it drives the screening mechanism (3) to perform step-by-step vibration screening on the crushed concrete waste, large-volume crushed concrete waste is discharged from the screening outlet (103), and small-volume crushed concrete waste enters the collecting box (5) after being screened step by step.

2. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 1 is characterized by: The top of the box body (102) is fixedly connected to a feed hopper (101); the crushing assembly (2) comprises a driven gear (202) and a driving gear (203); the teeth of the driven gear (202) mesh with the teeth of the driving gear (203); the backs of the driven gear (202) and the driving gear (203) are fixedly connected to crushing rollers (201); the front of the driving gear (203) is fixedly connected to a motor (204); and both sides of the top of the inner side of the box body (102) are rotatably connected to the crushing rollers (201).

3. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 2 is characterized by: The screening mechanism (3) comprises two groups of drive assemblies (304), three groups of sieve plate assemblies (301) are equidistantly arranged between the two drive assemblies (304), the sub-sieve plate assemblies (301) are generally sloped, the inclination directions of two adjacent groups of sub-sieve plate assemblies (301) are opposite, and fixing assemblies (302) are arranged on both sides of each group of sub-sieve plate assemblies (301).

4. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 3 is characterized by: The sub-screen plate assembly (301) comprises a central axis (3012), one side of the central axis (3012) being fixedly connected to a straight sub-screen plate (3011), and the other side of the central axis (3012) being fixedly connected to an inclined sub-screen plate (3014), the straight sub-screen plate (3011) being parallel to the horizontal direction, the inclined sub-screen plate (3014) being arranged at an inclination, and there are three screening outlets (103), and the screening outlets (103) are respectively located at the top of the straight sub-screen plate (3011).

5. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 4 is characterized by: The driving assembly (304) comprises a fixed bracket (3041), the top of the fixed bracket (3041) is rotatably connected to a second connecting rod (3042), the top of the second connecting rod (3042) is rotatably connected to a first connecting rod (3043), the center of the front face of the driven gear (202) is fixedly connected to a central rotating shaft (3044), the top of the first connecting rod (3043) is fixedly connected to the front face of the central rotating shaft (3044), the front and back faces of the central axis (3012) are fixedly connected to fixed round blocks (3013), the fixed round blocks (3013) are fixedly connected to a side of the fixed bracket (3041) close to the sub-screening plate assembly (301), and the front and back faces of the box body (102) are provided with limiting holes (104) that are clearance-matched with the outer diameter of the fixed round blocks (3013).

6. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 5 is characterized by: The fixing assembly (302) comprises a fixing plate (3021), the front and back sides of the fixing plate (3021) close to the central axis (3012) are fixedly connected to convex clamping blocks (3022), the front side of the fixing plate (3021) away from the central axis (3012) is fixedly connected to a fixing shaft (3023), and the front and back sides of the fixing shaft (3023) are rotatably connected to the inner wall of the box body (102).

7. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 6 is characterized by: The straight sub-screen plate (3011) and the inclined sub-screen plate (3014) are provided with a square groove that is clearance-matched with the fixed plate (3021) on one side away from the central axis (3012), and the front and back sides of the square groove are provided with a limiting groove (3015).

8. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 4 is characterized by: An adjustment component (303) is provided on the inner side of the straight sub-screen plate (3011) and the inclined sub-screen plate (3014) located at the bottom. The adjustment component (303) comprises an inner screen plate (3031). The front sides of the straight sub-screen plate (3011) and the inclined sub-screen plate (3014) located at the bottom are provided with mounting grooves that match the width gap of the inner screen plate (3031). An electric push rod (3032) is fixedly connected to one side of the inner screen plate (3031) close to the central axis (3012).

9. The concrete recycling and crushing device based on the recycling of urban construction waste according to claim 2 is characterized by: A guide plate (305) is provided below the crushing roller (201); a mounting shaft (306) is fixedly connected to one side of the guide plate (305); the front and back sides of the mounting shaft (306) are rotatably connected to the inner wall of the box body (102); a torsion spring is provided on the outer side of the mounting shaft (306); two ends of the torsion spring are respectively fixedly connected to the outer side of the mounting shaft (306) and the inner wall of the box body (102).

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