Treatment method for resource utilization of building decoration waste

Abstract

The invention relates to the field of solid waste treatment, in particular to a treatment method for resource utilization of building decoration waste, which comprises the following steps: when concrete blocks are treated, firstly, building wall blocks are divided into strip-shaped concrete blocks which can be put into a crushing device, and then the strip-shaped concrete blocks are extruded and crushed by utilizing an extruding and crushing mechanism in the crushing device; the reinforcing steel bars wrapped with the concrete blocks are obtained, and then the reinforcing steel bars wrapped with the concrete blocks are impacted and crushed through the impact crushing mechanism, so that separation of the reinforcing steel bars and the concrete blocks is achieved; and finally, the reinforcing steel bars intercepted by the screen are lifted through a lifting plate provided with an electromagnet, discharging of the reinforcing steel bars is achieved through cooperation of a side door plate and a material guide plate, efficient sorting of the reinforcing steel bars is achieved, and the problem that a traditional crushing device cannot treat concrete blocks wrapping the surfaces of the reinforcing steel bars is solved. The purity of concrete recycled aggregate and the recovery efficiency of reinforcing steel bars are improved.

Description

Technical Field

[0001] The invention relates to a construction waste recycling method, in particular to a construction waste resource utilization treatment method applied to the field of solid waste treatment. Background Art

[0002] The treatment of construction waste usually involves a cumbersome sorting and recycling process, especially when dealing with building walls. The walls must first be broken to extract the built-in steel bars. At the same time, the broken concrete blocks need to be further recovered and broken down to convert them into recycled aggregates for building materials. However, the current treatment methods face huge challenges when dealing with walls to separate the steel bars: the walls need to be completely broken up, and the steel bars have to be cut off one by one, which is a time-consuming and laborious process. What is particularly tricky is that because the steel bars are often interwoven in an intricate frame-like structure in the building walls, when hydraulic hammers or other percussion equipment are used for operation, the surface of the steel bars is very likely to adhere to the residual concrete blocks that are difficult to remove. These concrete blocks not only increase the difficulty of cleaning, but also greatly extend the processing time, making the entire separation process extremely cumbersome.

[0003] The existing patent with publication number CN110976478B discloses a resource processing process for demolition and decoration waste, including: dividing construction waste into two categories: demolition and decoration waste; separating iron-containing materials and light materials in demolition and decoration waste; separating miscellaneous soil, iron-containing materials and light materials in decoration waste; combining pre-treated demolition and decoration waste and crushing them into recycled aggregates; separating iron-containing materials and light materials in recycled aggregates; screening the processed recycled aggregates into recycled aggregates with different particle size ranges. The sorting processes of demolition and decoration waste are reasonably combined, firstly the demolition and decoration waste are subjected to different pretreatment processes to make the properties and components of the two the same, then the two are crushed into recycled aggregates, and finally the recycled aggregates are selected and processed to make the quality of the recycled aggregates high; it not only ensures the high sorting efficiency and resource utilization rate of demolition and decoration wastes, but also reduces equipment investment and saves floor space.

[0004] The above-mentioned existing patent discloses the separation of different types of materials in construction waste, but does not provide how to achieve the rapid separation of steel bars and concrete blocks wrapped on the surface. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the separation operation of the steel bars and concrete blocks in the building wall is cumbersome and difficult.

[0006] In order to solve the above problems, the present invention provides a method for recycling construction and decoration waste, comprising the following steps:

[0007] Step 1, dividing the building wall blocks into strip-shaped concrete blocks;

[0008] Step 2, putting the strip concrete block into the crushing device;

[0009] Step 3: The crushing device first crushes the strip-shaped concrete blocks by extrusion and then by impact crushing;

[0010] Step 4: The crushing device sorts and discharges the steel bars and concrete particles obtained after crushing;

[0011] Among them, the crushing device in step 2 to step 4 includes a crushing barrel with a feeding hopper connected to the upper end, an annular cavity is opened at the edge of the crushing barrel, and the crushing barrel is located inside the annular cavity. A vertical cavity arranged opposite to the feeding hopper is opened, and the vertical cavity is connected to the annular cavity; a heart-shaped cavity connected to the vertical cavity is opened below the vertical cavity, and the lower part of the heart-shaped cavity is connected to the annular cavity. The lower end of the crushing barrel is fixedly connected to a feed pipe arranged opposite to the heart-shaped cavity, and a screen is installed at the connection between the feed pipe and the crushing barrel;

[0012] An extrusion crushing mechanism is installed in the vertical cavity, and the extrusion crushing mechanism includes a fixed plate and a movable plate arranged relatively to each other, and an eccentric movement mechanism for driving the movable plate to move eccentrically; an impact crushing mechanism is installed in the heart-shaped cavity, and the impact crushing mechanism includes a pair of rollers arranged symmetrically on the left and right, and a counter-attack plate fixedly connected to the inner wall of the heart-shaped cavity is arranged on the outer side of the pair of rollers, and a plurality of plate hammers distributed in a circumference are elastically connected to the rollers, and a pair of rollers are connected to a rotation driving mechanism for driving the two to move synchronously in opposite directions;

[0013] A lifting plate is nested in the annular cavity and is in sliding contact with the inner wall thereof, an electromagnet is fixedly connected inside the lifting plate, the lifting plate is connected to a circumferential driving mechanism, a side door plate is hinged at the lower right side of the crushing barrel, the side door plate is fixedly connected to a first electric push rod that drives it to rotate outward, a material guide plate is abutted at the lower end of the side door plate, and the material guide plate is fixedly connected to a second electric push rod that drives it to move radially.

[0014] In the above-mentioned construction and decoration waste resource utilization treatment method, concrete and steel bars are efficiently sorted and recycled through the extrusion crushing mechanism, the impact crushing mechanism and the lifting plate.

[0015] As a further improvement of the present application, an industrial camera is provided on the upper right side of the crushing barrel, with the shooting end of the industrial camera facing the lower side of the feeding hopper. The industrial camera is used to photograph the steel bars adsorbed on the lifting plate and the concrete blocks adhered to the steel bars. A mounting pipe fixedly connected to the crushing barrel is fixedly sleeved on the outer side of the industrial camera, and a protective glass is fixedly connected to the connection between the mounting pipe and the crushing barrel. The industrial camera is electrically connected to a controller.

[0016] As a further improvement of the present application, the controller includes an image analysis module and a feature storage module. The image analysis module extracts and compares features of real-time images taken by the industrial camera, and the feature storage module stores the features of the steel bar package.

[0017] As a further improvement of the present application, the fixed plate is fixedly connected to the inner wall of one side of the vertical cavity, the eccentric drive mechanism includes an eccentric shaft rotatably connected to the upper end of the moving plate, a hinged rod is hinged at the lower position of the moving plate away from the fixed plate, the lower end of the hinged rod is hinged to the inner wall of the vertical cavity, and the eccentric shaft extends to the outside of the crushing barrel and is connected to the output shaft of the first motor.

[0018] As a further improvement of the present application, the movable plate includes an inclined plate arranged obliquely and a vertical plate fixedly connected to its lower end. An extrusion cavity with a width gradually decreasing from top to bottom is formed between the inclined plate and the fixed plate. The vertical plate cooperates with the fixed plate to extrude the steel bars.

[0019] As a further improvement of the present application, the circumferential drive mechanism includes a rotating ring nested in the annular cavity and rotatably connected to the inner wall of the annular cavity, the lifting plate is fixedly connected to the side wall of the rotating ring, the rotating ring is fixedly connected to the side away from the lifting plate with a gear ring, the gear ring is meshed with a driving gear, the driving gear is fixedly connected to the output shaft of the fourth motor, and the fourth motor is fixed on the side wall of the crushing barrel.

[0020] As a further improvement of the present application, the rotating ring is a circular ring structure, and an annular groove is provided on the side wall of the rotating ring away from the lifting plate. The gear ring is fixed on the inner wall of the annular groove, and the driving gear is nested in the annular groove and meshes with the gear ring.

[0021] As a further improvement of the present application, the rotating drive mechanism includes a pair of roller shafts fixedly connected to the ends of a pair of rotating rollers, the roller shafts extend into the crushing barrel and are rotatably connected to a movable frame, the movable frame passes through a shaft sleeve rotatably connected thereto, the shaft sleeve is connected to the roller shaft for transmission through a transmission gear set, the transmission gear set includes a pair of vertically meshing bevel gears, one of the bevel gears is fixedly connected to the roller shaft, and the other bevel gear is fixedly sleeved with the sleeve, the sleeve passes through a prismatic shaft slidably engaged therewith, and the end of the prismatic shaft is connected to the output shaft of the second motor through a coupling.

[0022] As a further improvement of the present application, a pair of movable frames are threadedly connected to the same bidirectional screw at the outer ends, the ends of the bidirectional screw are connected to the output shaft of the third motor via a coupling, and a transverse groove for the roller shaft to slide is provided on the side wall of the crushing barrel.

[0023] As a further improvement of the present application, the rotating roller is provided with circumferentially distributed nesting grooves, the plate hammer is in sliding contact with the inner wall of the nesting groove, the inner wall of the nesting groove is fixedly connected with a guide rod extending into the plate hammer, and a spring is nested in the plate hammer and abuts against the end of the guide rod.

[0024] In summary, when processing concrete blocks, the present invention first divides the building wall blocks into strip concrete blocks that can be put into a crushing device, and then uses an extrusion crushing mechanism in the crushing device to extrude and crush the strip concrete blocks to obtain concrete particles and steel bars wrapped with concrete blocks, and then uses an impact crushing mechanism to centrifugally throw the concrete particles and the steel bars wrapped with concrete blocks to the impact plate, so that the concrete blocks wrapped with the steel bars are impacted and crushed to separate from the steel bars, thereby realizing the separation of the steel bars and the concrete blocks; finally, the concrete particles that do not meet the particle size requirements and are intercepted by the screen are put into the vertical cavity for secondary crushing through a lifting plate equipped with an electromagnet, and the steel bars are discharged through the cooperation of the side door plate and the guide plate, thereby realizing efficient sorting of the steel bars, overcoming the problem that the traditional crushing device cannot process the concrete blocks wrapped on the surface of the steel bars, and improving the purity of the recycled aggregate of the concrete and the recovery efficiency of the steel bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the present application from the front side perspective;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the present application from a rear side perspective;

[0027] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 5 This is a schematic diagram of the internal structure of the crushing cylinder in this application;

[0030] Figure 6 This is a schematic diagram of the explosive assembly structure of the extrusion and crushing mechanism in this application;

[0031] Figure 7 This is a schematic diagram of the explosive assembly structure of the impact crushing mechanism in this application;

[0032] Figure 8 This is a schematic diagram of the assembly structure of the lifting plate and the circumferential drive mechanism in this application;

[0033] Fig. 9 This is a schematic diagram of the crushing state of the crushing barrel in this application;

[0034] Fig.10 This is a schematic diagram of the shape changes of steel bars and concrete in this application;

[0035] Fig.11 This is a schematic diagram of the status of steel bars being lifted and sorted in this application.

[0036] Description of the numbers in the figure:

[0037] 1. Crushing barrel; 101. Annular cavity; 102. Vertical cavity; 103. Heart-shaped cavity; 104. Horizontal chute; 2. Feeding hopper; 3. Feeding pipe; 4. Screen; 5. Support frame; 6. Extrusion crushing mechanism; 7. Impact crushing mechanism; 8. Lifting plate; 9. Industrial camera; 10. Side door plate; 11. First electric push rod; 12. Guide plate; 13. Second electric push rod; 14. Controller; 15. Fixed plate; 16. Moving plate; 1601. Inclined plate; 1602. Vertical plate; 17. Eccentric shaft; 18, first motor; 19, hinged rod; 20, impact plate; 21, roller; 2101, nested groove; 22, plate hammer; 23, guide rod; 24, spring; 25, roller shaft; 26, transmission gear set; 27, bushing; 28, prismatic shaft; 29, second motor; 30, moving frame; 31, bidirectional screw rod; 32, third motor; 33, rotating ring; 34, gear ring; 35, driving gear; 36, fourth motor; 37, electromagnet; 38, mounting tube; 39, protective glass. DETAILED DESCRIPTION

[0038] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0039] The first implementation method:

[0040] Figure 1-11 A method for recycling construction and decoration waste is shown, comprising the following steps:

[0041] Step 1: dividing the building wall blocks into strip concrete blocks, using a hydraulic hammer to divide the building wall blocks into long strip concrete blocks, and using a hydraulic shear or a cutting machine to cut the steel bars connecting adjacent strip concrete blocks;

[0042] Specifically, the volume of the strip concrete block needs to meet the volume requirement so that it can be put into the crushing device;

[0043] Step 2: Put the bar-shaped concrete block into the crushing device by using a forklift;

[0044] Step 3: The crushing device first crushes the strip concrete blocks by extrusion and then by impact crushing, so that the steel bars are separated from the concrete particles;

[0045] Step 4: The crushing device sorts and discharges the steel bars and concrete particles;

[0046] Among them, see Figure 3The crushing device in step 2 to step 4 includes a crushing barrel 1 connected to a feeding hopper 2 at the upper end, an annular cavity 101 is provided at the edge of the crushing barrel 1, and a vertical cavity 102 arranged opposite to the feeding hopper 2 is provided inside the annular cavity 101 of the crushing barrel 1, and the vertical cavity 102 is communicated with the annular cavity 101; a heart-shaped cavity 103 communicating with the vertical cavity 102 is provided below the vertical cavity 102 of the crushing barrel 1, and the lower part of the heart-shaped cavity 103 is communicated with the annular cavity 101, and a feed pipe 3 arranged opposite to the heart-shaped cavity 103 is fixedly connected at the lower end of the crushing barrel 1, and a screen 4 is installed at the connection between the feed pipe 3 and the crushing barrel 1;

[0047] See also Figure 4-6 The vertical cavity 102 is provided with an extrusion and crushing mechanism 6, which includes a fixed plate 15 and a movable plate 16 arranged relatively to each other and an eccentric motion mechanism for driving the movable plate 16 to move eccentrically. The eccentric motion mechanism drives the movable plate 16 to move eccentrically and cooperates with the fixed plate 15 to extrude and crush the strip concrete blocks falling into the gap between the fixed plate 15 and the movable plate 16.

[0048] See also Figure 4 and Figure 7 An impact crushing mechanism 7 is installed in the heart-shaped cavity 103. The impact crushing mechanism 7 includes a pair of rollers 21 symmetrically arranged on the left and right sides. An impact plate 20 fixedly connected to the inner wall of the heart-shaped cavity 103 is arranged on the outer side of the pair of rollers 21. A plurality of plate hammers 22 distributed in a circumference are elastically connected to the rollers 21. The pair of rollers 21 are connected to a rotating drive mechanism for driving the two to move synchronously in opposite directions. The rotating drive mechanism drives the pair of rollers 21 to move in opposite directions, and throws the concrete blocks with exposed steel bars crushed by the squeezing and crushing mechanism 6 to the impact plate 20, and impacts and crushes the concrete blocks wrapped outside the steel bars.

[0049] See also Figure 4 and Figure 8 A lifting plate 8 is nested in the annular cavity 101 and is in sliding contact with the inner wall thereof. An electromagnet 37 is fixedly connected to the lifting plate 8. The lifting plate 8 is connected to a circumferential driving mechanism. A side door plate 10 is hingedly connected to the lower right side of the crushing cylinder 1. The side door plate 10 is fixedly connected to a first electric push rod 11 that drives it to rotate outward. A material guide plate 12 is abutted at the lower end of the side door plate 10. The material guide plate 12 is fixedly connected to a second electric push rod 13 that drives it to move radially.

[0050] See also Figure 9-11First, when the steel bars wrapped with concrete blocks are impacted and crushed into independent steel bars and concrete particles, they fall onto the screen 4. The screen 4 screens the concrete particles. The concrete particles that meet the particle size requirements fall into the discharge pipe 3 through the sieve holes of the screen 4 and are discharged. The screen 4 intercepts large concrete particles (concrete particles that do not meet the particle size requirements) and steel bars. Second, the circular drive mechanism drives the lifting plate 8 to make a circular motion in the annular cavity 101, and turns on the electromagnet 37 of the lifting plate 8. The lifting plate 8 lifts the large concrete particles and steel bars on the screen 4 to the top of the vertical cavity 102. Under the action of gravity, the concrete The large soil particles fall into the vertical cavity 102 again, and then are squeezed and impact crushed for the second time, while the steel bars are adsorbed on the end face of the lifting plate 8 under the magnetic attraction of the electromagnet 37; thirdly, the side door plate 10 is opened by the first electric push rod 11, and the guide plate 12 is inserted into the annular cavity 101 and its inner end face abuts against the inner end face of the annular cavity 101 through the second electric push rod 13; fourthly, the circumferential drive mechanism is started again, so that the lifting plate 8 drives the steel bars to move above the guide plate 12, and then the circumferential drive mechanism and the electromagnet 37 are closed, so that the steel bars fall onto the guide plate 12 under the action of gravity and are discharged from the crushing cylinder 1.

[0051] Compared with the traditional construction waste treatment method, when treating concrete blocks, the present invention first divides the building wall blocks into strip concrete blocks that can be put into the crushing device, and then uses the extrusion crushing mechanism 6 in the crushing device to extrude and crush the strip concrete blocks to obtain concrete particles and steel bars wrapped with concrete blocks, and then uses the impact crushing mechanism 7 to centrifugally throw the concrete particles and the steel bars wrapped with concrete blocks to the impact plate, so that the concrete blocks wrapped with the steel bars are impacted and crushed to separate from the steel bars, thereby realizing the separation of the steel bars and the concrete blocks; finally, the concrete particles that do not meet the particle size requirements and are intercepted by the screen 4 are put into the vertical cavity 102 for secondary crushing through the lifting plate 8 equipped with the electromagnet 37, and the steel bars are discharged by cooperating with the side door plate 10 and the guide plate 12, thereby realizing efficient sorting of the steel bars, overcoming the problem that the traditional crushing device cannot handle the concrete blocks wrapped on the surface of the steel bars, and improving the purity of the recycled aggregate of the concrete and the recovery efficiency of the steel bars.

[0052] See also Figure 1 The crushing barrel 1 is a longitudinally arranged cylindrical structure, the annular cavity 101 is an annular cavity with an annular cross section and is longitudinally arranged, the vertical cavity 102 is a strip cavity with a rectangular cross section and is longitudinally arranged, the heart-shaped cavity 103 is a strip cavity with a heart-shaped cross section and is longitudinally arranged, and the lower end of the crushing barrel 1 is fixedly connected to a support frame 5.

[0053] See also Figure 2 , Figure 3 and Figure 5The fixed plate 15 is fixedly connected to the inner wall of one side of the vertical cavity 102. The eccentric driving mechanism includes an eccentric shaft 17 rotatably connected to the upper end of the movable plate 16. The movable plate 16 is hinged with a hinge rod 19 at the lower position of the side away from the fixed plate 15. The lower end of the hinge rod 19 is hinged to the inner wall of the vertical cavity 102. The eccentric shaft 17 extends to the outside of the crushing drum 1 and is connected to the output shaft of the first motor 18.

[0054] Specifically, the output shaft of the first motor 18 drives the eccentric shaft 17 to rotate eccentrically, and the eccentric shaft 17 drives the movable plate 16 to move eccentrically, so as to squeeze and crush the strip-shaped concrete blocks falling into the gap between the fixed plate 15 and the movable plate 16 .

[0055] See also Figure 4 and Figure 6 The movable plate 16 includes an inclined plate 1601 and a vertical plate 1602 fixedly connected to its lower end. An extrusion cavity with a width gradually decreasing from top to bottom is formed between the inclined plate 1601 and the fixed plate 15. The vertical plate 1602 cooperates with the fixed plate 15 to extrude the steel bars.

[0056] Specifically, when there are three-dimensional staggered steel bars in the concrete, multiple steel bars are interconnected to form a three-dimensional frame structure. The three-dimensional steel frame is squeezed and bent by the vertical plate 1602, so that the three-dimensional steel frame wrapped with concrete blocks is compressed to a flat shape as a whole, which is convenient for subsequent centrifugal throwing and impact crushing. The concrete blocks wrapped on the outside of the steel bars are more likely to contact and collide with the impact plate 20. At the same time, it is convenient for the lifting plate 8 to magnetically fix the flat steel frame.

[0057] See also Figure 8 The circumferential drive mechanism includes a rotating ring 33 nested in the annular cavity 101 and rotatably connected to the inner wall of the annular cavity 101. The lifting plate 8 is fixedly connected to the side wall of the rotating ring 33. The rotating ring 33 is fixedly connected to a gear ring 34 on the side away from the lifting plate 8. The gear ring 34 is meshed with a driving gear 35. The driving gear 35 is fixedly connected to the output shaft of the fourth motor 36. The fourth motor 36 is fixed to the side wall of the crushing barrel 1.

[0058] Specifically, the output shaft of the fourth motor 36 drives the driving gear 35 to rotate, the driving gear 35 drives the gear ring 34 to rotate, the gear ring 34 drives the lifting plate 8 to make a circular motion in the annular cavity 101, and the lifting plate 8 performs a circular lifting on the steel bars and concrete particles trapped by the screen 4.

[0059] See also Figure 8 The rotating ring 33 is a circular ring structure. An annular groove is provided on the side wall of the rotating ring 33 away from the lifting plate 8. The gear ring 34 is fixed on the inner wall of the annular groove. The driving gear 35 is nested in the annular groove and meshes with the gear ring 34.

[0060] Specifically, the driving gear 35 and the gear ring 34 are shielded by the rotating ring 33 to reduce the intrusion of dust when the concrete is crushed.

[0061] Second implementation method:

[0062] Figure 2 , Figure 3 , Figure 4 and Figure 7 A method for resource utilization of construction and decoration waste is shown. On the basis of the first embodiment, an industrial camera 9 is provided on the upper right side of the crushing drum 1, and the shooting end of the industrial camera 9 is facing the lower side of the feeding hopper 2. The industrial camera 9 is used to photograph the steel bars adsorbed on the lifting plate 8 and the concrete blocks adhered to the steel bars. A mounting pipe 38 fixedly connected to the crushing drum 1 is fixedly sleeved on the outer side of the industrial camera 9, and a protective glass 39 is fixedly connected to the connection between the mounting pipe 38 and the crushing drum 1, and the industrial camera 9 is electrically connected to the controller 14.

[0063] Specifically, when the lifting plate 8 absorbs the steel bar and rotates to the lower side of the feeding hopper 2, the circumferential driving mechanism is closed, the industrial camera 9 is started to shoot the surface of the lifting plate 8, and the captured image is transmitted back to the controller 14. The controller 14 recognizes the captured image. When it is recognized that there is a concrete block adhered to the surface of the steel bar, the controller 14 turns off the electromagnet 37 in the lifting plate 8, so that the steel bar is separated from the lifting plate 8 under the action of gravity and falls into the vertical cavity 102, and is squeezed and impacted again, so as to realize the automatic detection of the steel bar separation quality and improve the steel bar sorting efficiency.

[0064] It should be noted that the controller 14 includes an image analysis module and a concrete block feature storage module. The image analysis module extracts the features of the real-time captured image, and then compares them with the block features stored in the concrete block feature storage module to determine whether there are concrete blocks attached to the steel bars adsorbed on the lifting plate 8.

[0065] See also Figure 7 The rotation drive mechanism includes a pair of roller shafts 25 fixedly connected to the ends of a pair of rotating rollers 21. The roller shafts 25 extend into the crushing drum 1 and are rotatably connected to a movable frame 30. The movable frame 30 is penetrated by a shaft sleeve 27 rotatably connected thereto. The shaft sleeve 27 is connected to the roller shaft 25 for transmission through a transmission gear set 26. The transmission gear set 26 includes a pair of vertically meshed bevel gears, one of which is fixedly connected to the roller shaft 25, and the other is fixedly sleeved with the shaft sleeve 27. The shaft sleeve 27 is penetrated by a prismatic shaft 28 slidably engaged therewith, and the end of the prismatic shaft 28 is connected to the output shaft of a second motor 29 through a coupling.

[0066] Specifically, the output shaft of the second motor 29 drives the prism shaft 28 to rotate, the prism shaft 28 drives the sleeve 27 to rotate, and the sleeve 27 drives the roller shaft 25 to rotate through the transmission gear set 26, so that a pair of roller shafts 25 drive a pair of rotating rollers 21 to move in reverse directions, throwing the fallen steel bar block to the impact plate 20.

[0067] See also Figure 7 The outer ends of a pair of movable frames 30 are threadedly connected with the same bidirectional screw rod 31, and the end of the bidirectional screw rod 31 is connected to the output shaft of the third motor 32 through a coupling. A transverse sliding groove 104 for the roller shaft 25 to slide is opened on the side wall of the crushing cylinder 1.

[0068] Specifically, the third motor 32 drives the bidirectional screw rod 31 to rotate, and the bidirectional screw rod 31 drives a pair of movable frames 30 to move in the same direction or in the opposite direction, thereby adjusting the spacing of the rollers 21; it should be particularly noted that when the lifting plate 8 drives the same steel bar wrapped with concrete blocks to be photographed and identified by the industrial camera 9 for multiple times, it means that the concrete blocks on the steel bar are difficult to remove, and the controller 14 controls the second motor 29 to reverse, so that a pair of rollers 21 rotate in opposite directions, and starts the third motor 32, so that the gap between the rollers 21 is reduced, the steel bar wrapped with concrete blocks is squeezed and crushed, and the steel bar frame is further squeezed and bent, so as to improve the crushing and removal effect of the blocks.

[0069] See also Figure 4 The roller 21 is provided with circumferentially distributed nesting grooves 2101, the plate hammer 22 is in sliding contact with the inner wall of the nesting groove 2101, the inner wall of the nesting groove 2101 is fixedly connected with a guide rod 23 extending into the plate hammer 22, and a spring 24 is nested in the plate hammer 22 and abuts against the end of the guide rod 23.

[0070] Specifically, when a pair of rollers 21 rotate in opposite directions, the plate hammers 22 are extended to the outside of the rollers 21 by the centrifugal force to centrifugally scatter the steel bars wrapped with concrete blocks; when a pair of rollers 21 move towards each other to squeeze and crush the concrete blocks, the plate hammers 22 located opposite to each other on the pair of rollers 21 are squeezed against each other and accommodated in the nested grooves 2101.

[0071] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A method for recycling construction and decoration waste, characterized in that: The steps include: Step 1, dividing the building wall blocks into strip-shaped concrete blocks; Step 2, putting the strip concrete block into the crushing device; Step 3: The crushing device first crushes the strip-shaped concrete blocks by extrusion and then by impact crushing; Step 4: The crushing device sorts and discharges the steel bars and concrete particles obtained after crushing; The crushing device comprises a crushing cylinder (1) whose upper end is connected to a feeding hopper (2); an annular cavity (101) is provided at the edge of the crushing cylinder (1); a vertical cavity (102) arranged opposite to the feeding hopper (2) is provided inside the annular cavity (101) of the crushing cylinder (1); the vertical cavity (102) is connected to the annular cavity (101); a heart-shaped cavity (103) connected to the vertical cavity (102) is provided below the vertical cavity (102); the lower part of the heart-shaped cavity (103) is connected to the annular cavity (101); a feed pipe (3) arranged opposite to the heart-shaped cavity (103) is fixedly connected to the lower end of the crushing cylinder (1); a screen (4) is installed at the connection between the feed pipe (3) and the crushing cylinder (1); An extrusion crushing mechanism (6) is installed in the vertical cavity (102), and the extrusion crushing mechanism (6) includes a fixed plate (15) and a movable plate (16) arranged relatively to each other, and an eccentric movement mechanism for driving the movable plate (16) to move eccentrically; an impact crushing mechanism (7) is installed in the heart-shaped cavity (103), and the impact crushing mechanism (7) includes a pair of rollers (21) arranged symmetrically on the left and right, and a counter-attack plate (20) fixedly connected to the inner wall of the heart-shaped cavity (103) is arranged on the outer side of the pair of rollers (21), and a plurality of plate hammers (22) distributed in a circumference are elastically connected to the rollers (21), and the pair of rollers (21) are connected to a rotation driving mechanism for driving the two rollers to move synchronously in opposite directions; A lifting plate (8) is nested in the annular cavity (101) and is in sliding contact with the inner wall thereof. An electromagnet (37) is fixedly connected to the lifting plate (8). The lifting plate (8) is connected to a circumferential driving mechanism. A side door plate (10) is hingedly connected to the lower right side of the crushing cylinder (1). The side door plate (10) is fixedly connected to a first electric push rod (11) for driving the side door plate to rotate outward. A material guide plate (12) is abutted at the lower end of the side door plate (10). The material guide plate (12) is fixedly connected to a second electric push rod (13) for driving the side door plate to move radially.

2. A method for recycling construction and decoration waste according to claim 1, characterized in that: An industrial camera (9) is provided on the upper right side of the crushing cylinder (1), with the shooting end of the industrial camera (9) facing the lower side of the feeding hopper (2). The industrial camera (9) is used to shoot the steel bars adsorbed on the lifting plate (8) and the concrete blocks adhered to the steel bars. A mounting pipe (38) fixedly connected to the crushing cylinder (1) is fixedly sleeved on the outer side of the industrial camera (9), and a protective glass (39) is fixedly connected to the connection between the mounting pipe (38) and the crushing cylinder (1). The industrial camera (9) is electrically connected to a controller (14).

3. A method for recycling construction and decoration waste according to claim 2, characterized in that: The controller (14) comprises an image analysis module and a feature storage module. The image analysis module extracts and compares features of a real-time image captured by an industrial camera (9). The feature storage module stores features of the steel bar block.

4. A method for recycling construction and decoration waste according to claim 1, characterized in that: The fixed plate (15) is fixedly connected to the inner wall of one side of the vertical cavity (102); the eccentric driving mechanism comprises an eccentric shaft (17) rotatably connected to the upper end of the movable plate (16); a hinge rod (19) is hingedly connected to the lower position of the movable plate (16) away from the fixed plate (15); the lower end of the hinge rod (19) is hingedly connected to the inner wall of the vertical cavity (102); the eccentric shaft (17) extends to the outside of the crushing barrel (1) and is connected to the output shaft of the first motor (18).

5. A method for recycling construction and decoration waste according to claim 4, characterized in that: The movable plate (16) comprises an inclined plate (1601) and a vertical plate (1602) fixedly connected to the lower end thereof; an extrusion cavity with a width gradually decreasing from top to bottom is formed between the inclined plate (1601) and the fixed plate (15); the vertical plate (1602) cooperates with the fixed plate (15) to extrude the steel bars.

6. A method for recycling construction and decoration waste according to claim 1, characterized in that: The circumferential drive mechanism comprises a rotating ring (33) nested in the annular cavity (101) and rotatably connected to the inner wall of the annular cavity (101); the lifting plate (8) is fixedly connected to the side wall of the rotating ring (33); a gear ring (34) is fixedly connected to the side of the rotating ring (33) away from the lifting plate (8); the gear ring (34) is meshed with a driving gear (35); the driving gear (35) is fixedly connected to the output shaft of a fourth motor (36); and the fourth motor (36) is fixed to the side wall of the crushing barrel (1).

7. A method for recycling construction and decoration waste according to claim 6, characterized in that: The rotating ring (33) is a circular ring structure. An annular groove is provided on the side wall of the rotating ring (33) away from the lifting plate (8). The gear ring (34) is fixed on the inner wall of the annular groove. The driving gear (35) is nested in the annular groove and meshes with the gear ring (34).

8. A method for recycling construction and decoration waste according to claim 3, characterized in that: The rotation drive mechanism comprises a pair of roller shafts (25) fixedly connected to the ends of a pair of rotating rollers (21); the roller shafts (25) extend into the crushing drum (1) and are rotationally connected to a moving frame (30); the moving frame (30) is penetrated by a shaft sleeve (27) rotationally connected thereto; the shaft sleeve (27) is connected to the roller shaft (25) for transmission via a transmission gear set (26); the transmission gear set (26) comprises a pair of vertically meshed bevel gears, one of which is fixedly connected to the roller shaft (25); the other of which is fixedly sleeved with the shaft sleeve (27); the shaft sleeve (27) is penetrated by a prismatic shaft (28) slidably engaged therewith; the end of the prismatic shaft (28) is connected to the output shaft of a second motor (29) via a coupling.

9. A method for recycling construction and decoration waste according to claim 8, characterized in that: The outer ends of a pair of movable frames (30) are threadedly connected to the same bidirectional screw rod (31), and the end of the bidirectional screw rod (31) is connected to the output shaft of a third motor (32) through a coupling. A transverse sliding groove (104) for the roller shaft (25) to slide is provided on the side wall of the crushing cylinder (1).

10. A method for recycling construction and decoration waste according to claim 9, characterized in that: The rotating roller (21) is provided with nesting grooves (2101) distributed in a circumferential manner, the plate hammer (22) is in sliding contact with the inner wall of the nesting groove (2101), the inner wall of the nesting groove (2101) is fixedly connected with a guide rod (23) extending into the plate hammer (22), and a spring (24) is nested in the plate hammer (22) and is in contact with the end of the guide rod (23).

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