Concrete recycling method and device

Abstract

The invention discloses a concrete recycling method and device, the device comprises a support, a feed hopper, a crushing assembly and a screening assembly, the feed hopper and the crushing assembly are arranged on one side of the support, and the screening assembly is arranged on the other side and connected with the support. The crushing assembly is provided with an adjustable clamping assembly and a crushing device, the clamping assembly clamps concrete on the clamping assembly, the crushing device drives a rotating shaft through a motor, a crushing head is arranged on a mounting column of a mounting disc on the shaft, and multi-angle crushing can be achieved. A containing cavity is formed between every two adjacent mounting discs, the crushing head can rotate, and broken blocks in distress can be squeezed into the cavities to prevent machine clamping. The screening assembly can remove metal impurities through magnetic separation. And the spraying assembly synchronously cleans and removes dust and impurities during crushing. The device integrates crushing, cleaning, screening, grading and magnetic separation, and the recycling efficiency and quality and the purity and cleanliness of recycled materials are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of concrete recycling equipment, specifically a method and apparatus for concrete recycling. Background Technology

[0002] With the continuous development of the construction industry, a large amount of construction waste is generated, of which concrete blocks account for a significant proportion. If these concrete blocks cannot be effectively recycled, it will not only waste resources but also occupy a large amount of land and pollute the environment.

[0003] Currently, existing concrete recycling equipment often suffers from incomplete crushing and low efficiency during the crushing process. Furthermore, the lack of effective cleaning and screening methods after crushing results in low-quality recycled materials that fail to meet reuse requirements. Additionally, some equipment is prone to jamming when encountering hard or large concrete blocks, affecting normal operation. Moreover, existing equipment struggles to effectively separate and remove any metallic impurities that may be present in the concrete.

[0004] In view of the problems existing in the prior art, the present invention provides a method and apparatus for concrete recycling, so as to improve the efficiency and quality of concrete recycling, solve the problem of machine jamming, and achieve effective separation of metal impurities. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for concrete recycling, in order to solve the problems mentioned in the background art, such as incomplete crushing, low efficiency, poor quality of recycled materials, easy jamming, and difficulty in separating metal impurities in existing concrete recycling equipment.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A method for recycling concrete includes the following steps:

[0008] The concrete block is fed into the feed hopper and clamped and fixed by the clamping assembly below the feed hopper.

[0009] Start the crushing device, and use the rotating shaft to drive the crushing head on the mounting plate and mounting column to rotate, so that the crushing head comes into contact with the concrete block to complete the crushing;

[0010] During the crushing process, the concrete blocks are simultaneously cleaned using a spray system.

[0011] The crushed concrete blocks are discharged into the screening assembly through the discharge port;

[0012] The screening cylinder of the drive screening component rotates, and at the same time, the electromagnet inside the screening cylinder performs magnetic separation on the crushed concrete blocks. The concrete blocks are screened using the sieve holes on the screening cylinder to obtain recycled material.

[0013] A concrete recycling device includes a support frame, a feeding hopper, a crushing component, and a screening component; wherein the feeding hopper is connected to the crushing component and the feeding hopper and the crushing component are located on one side of the support frame, and the screening component is located on the other side of the support frame and the crushing component and the screening component are connected.

[0014] The crushing assembly includes an adjustable clamping assembly and a crushing device; wherein, the clamping assembly is located above the crushing device and is used to clamp the concrete in the feed hopper and crush the concrete through the crushing device; then, the crushed concrete is discharged into the screening assembly through the discharge port located below the crushing assembly.

[0015] The crushing device includes a rotating shaft with several mounting discs fixedly connected to it. Mounting columns are mounted on the mounting discs, and crushing heads are mounted on the mounting columns. The crushing heads are connected to the mounting columns. The rotating shaft is driven by a motor, which in turn drives the crushing heads to contact the concrete blocks, thereby crushing the concrete blocks.

[0016] According to the above technical solution, the screening component includes a screening cylinder, a rotating frame, and a driving component; wherein, the rotating frame is fixedly connected to the support, the screening cylinder is rotatably connected to the rotating frame, and the driving component drives the screening cylinder to rotate, thereby completing the screening of the crushed concrete.

[0017] According to the above technical solution, an electromagnet is installed inside the screening cylinder, and a sieve hole is provided on the screening cylinder. The electromagnet is used to perform magnetic separation on the crushed concrete, and the sieve hole is used to filter out smaller concrete blocks after crushing.

[0018] According to the above technical solution, the drive component includes a drive motor and a chain; the drive motor drives the chain to rotate through a gear connection, the chain is set on the outer wall of the screening cylinder and has external teeth that mesh with the outer wall of the screening cylinder, thereby driving the screening cylinder to rotate.

[0019] According to the above technical solution, a rotating groove is also provided on the outer wall of the screening cylinder. The rotating groove cooperates with the rotating wheel provided on the rotating frame for the rotation of the screening cylinder.

[0020] According to the above technical solution, the mounting plate is provided with multiple mounting columns evenly arranged, and the crushing heads are staggered on the multiple mounting columns.

[0021] According to the above technical solution, a receiving cavity is formed between adjacent mounting plates. When the crushing head is unable to crush the concrete block, the crushing head is squeezed into the receiving cavity to avoid jamming when the crushing head is unable to crush the concrete block.

[0022] According to the above technical solution, the crushing head includes a connecting part and a crushing part, wherein the connecting part is rotatably connected to the mounting column, and the crushing part is fixedly connected to the connecting part.

[0023] According to the above technical solution, a spraying component is also installed inside the crushing component, which is used to clean the concrete blocks.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention integrates crushing, washing, screening, grading, and magnetic separation of concrete blocks through a crushing and screening assembly, improving the efficiency and quality of concrete recycling. The crushing assembly features staggered crushing heads on mounting columns on the mounting plates, enabling multi-angle and omnidirectional crushing of the concrete blocks for more thorough results. The design of the receiving cavities between adjacent mounting plates and the rotating connection between the crushing heads and the mounting columns allows the crushing heads to be forced into the receiving cavities when encountering difficult-to-crush concrete blocks, effectively preventing equipment jamming and improving operational stability. The electromagnets in the screening assembly perform magnetic separation on the crushed concrete blocks, separating out metallic impurities and further improving the purity of the recycled material.

[0026] The spray system simultaneously cleans the concrete blocks during the crushing process, removing dust and impurities from the surface of the concrete blocks and ensuring the cleanliness of the recycled material. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the screening component structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the clamping component structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the crushing device of the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the recycling device of the present invention.

[0032] The markings in the diagram are: 100-support, 200-feed hopper, 300-rotating shaft, 400-mounting plate, 500-mounting column, 600-crushing head, 700-screening cylinder, 800-rotating frame, 900-electromagnet, 110-drive motor, 111-chain, 112-gear, 113-rotating groove, 114-rotating wheel, 115-receiving cavity, 116-connecting part, 117-crushing part, 118-shell, 119-first clamping roller, 120-second clamping roller, 121-drive device, 122-first moving block, 123-second moving block, 124-first guide block, 125-second guide block, 126-drive wheel, 127-driven wheel, 128-tensioning wheel, 129-discharge port, 130-discharge hopper. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, a concrete recycling device includes a support 100, a feeding hopper 200, a crushing component, and a screening component; wherein, the feeding hopper 200 is connected to the crushing component, the feeding hopper 200 and the crushing component are arranged on one side of the support 100, the screening component is arranged on the other side of the support 100, and the crushing component and the screening component are connected.

[0036] The crushing assembly includes an adjustable clamping assembly and a crushing device; wherein, the clamping assembly is located above the crushing device and is used to clamp the concrete in the feed hopper 200 and crush the concrete through the crushing device; then, the crushed concrete is discharged into the screening assembly through the discharge port 129 located below the crushing assembly.

[0037] like Figure 4 As shown, the crushing assembly includes a rotating shaft 300, on which several mounting discs 400 are mounted and fixedly connected; mounting columns 500 are mounted on the mounting discs 400, and crushing heads 600 are mounted on the mounting columns 500 and connected to the mounting columns 500. The rotating shaft 300 is driven to rotate by a motor, which in turn drives the crushing heads 600 to contact the concrete blocks, thereby crushing the concrete blocks.

[0038] This invention integrates crushing, washing, screening, grading, and magnetic separation of concrete blocks by incorporating a crushing component and a screening component, thereby improving the efficiency and quality of concrete recycling. In the crushing component, the mounting columns 500 on the mounting plates 400 are staggered with crushing heads 600, enabling multi-angle and omnidirectional crushing of the concrete blocks for more thorough results. Through the design of the receiving cavity 115 between adjacent mounting plates 400 and the rotating connection between the crushing heads 600 and the mounting columns 500, when encountering difficult-to-crush concrete blocks, the crushing heads 600 can be forced into the receiving cavity 115, effectively preventing equipment jamming and improving the stability of equipment operation. The electromagnets 900 in the screening component perform magnetic separation on the crushed concrete blocks, separating out metallic impurities and further improving the purity of the recycled material.

[0039] The spray system simultaneously cleans the concrete blocks during the crushing process, removing dust and impurities from the surface of the concrete blocks and ensuring the cleanliness of the recycled material.

[0040] Example 2

[0041] The concrete recycling device of this invention is an integrated equipment system in which the various components work closely together to achieve efficient recycling of concrete blocks. Its overall structure includes a support frame 100, a feeding hopper 200, a crushing component, and a screening component. The specific structures of each part are as follows:

[0042] like Figure 1 As shown, the support frame 100, serving as the foundation for the entire device, is welded from high-strength steel, possessing extremely strong load-bearing capacity and stability, capable of stably supporting the weight of the feed hopper 200, crushing components, and screening components. The bottom of the support frame 100 is equipped with an anti-slip pad made of rubber, 2 cm thick. This pad not only increases the friction between the support frame 100 and the ground, preventing slippage during operation, but also provides some shock absorption, reducing the impact of noise and vibration generated during operation on the surrounding environment.

[0043] One side of the support frame 100 is equipped with a platform for installing the feed hopper 200 and the crushing assembly. The platform is fixedly connected to the main body of the support frame 100 by bolts, which are evenly distributed at the four corners and the midpoints of the four sides of the platform to ensure a secure installation. The other side of the support frame 100 is used to install the screening assembly. The screening assembly is fixed to the support frame 100 by connectors. The connectors are made of castings, which have high strength and precision, ensuring that the screening assembly will not shake during operation.

[0044] The feed hopper 200 is welded from wear-resistant steel plates, possessing excellent wear resistance and impact resistance, capable of withstanding the impact and friction of concrete blocks. The feed hopper 200 has a trapezoidal structure that is wider at the top and narrower at the bottom; for example, the upper diameter of the feed hopper 200 is 1.5 meters and the lower diameter is 0.8 meters. This structural design facilitates the smooth entry of concrete blocks into the crushing assembly, avoiding blockage.

[0045] The inner wall of the feed hopper 200 is lined with wear-resistant plates made of high-chromium cast iron, with a thickness of 5 mm. These plates are bolted to the inner wall of the feed hopper 200, allowing for easy replacement when worn to a certain extent, thus extending the service life of the feed hopper 200. A valve is installed at the lower opening of the feed hopper 200. This valve is pneumatically controlled, opened and closed by a cylinder. The valve opening degree can be adjusted according to the size of the concrete blocks and the feeding speed to control the number of concrete blocks entering the crushing assembly, ensuring efficient operation of the crushing assembly.

[0046] The clamping assembly is located above the crushing device and is used to clamp and fix the concrete in the feed hopper 200 to prevent the concrete blocks from moving during the crushing process and affecting the crushing effect.

[0047] like Figure 3 and Figure 5 As shown, the clamping assembly includes a first clamping roller 119, a second clamping roller 120, a driving device 121, and a moving component; wherein, both ends of the first clamping roller 119 are rotatably connected to the housing 118; one end of the first clamping roller 119 extends to the outside of the housing 118 and is connected to the driving device 121; the driving device 121 drives the first clamping roller 119 to rotate, and the first clamping roller 119 drives the second clamping roller 120 to rotate.

[0048] The moving assembly includes a first moving block 122, a second moving block 123, a first guide block 124, a second guide block 125, and a driving cylinder; wherein, the first moving block 122 and the first guide block 124 are disposed on the same side, and the second moving block 123 and the second guide block 125 are disposed on the same side. Specifically, the first moving block 122 and the first guide block 124 are disposed on the same side as the driving device 121, and the second moving block 123 and the second guide block 125 are disposed on the other side.

[0049] The two ends of the second clamping roller 120 are respectively disposed in the middle of the first moving block 122 and the second moving block 123. The first guide block 124 and the second guide block 125 are fixedly connected to the housing 118; the first moving block 122 is provided with a first sliding groove, and the first moving block 122 is slidably connected to the first guide block 124 through the first sliding groove; the second moving block 123 is provided with a second sliding groove, and the second moving block 123 is slidably connected to the second guide block 125 through the second sliding groove.

[0050] The ends of the first moving block 122 and the second moving block 123 are respectively connected to driving cylinders. The two driving cylinders drive the first moving block 122 and the second moving block 123 to slide, thereby adjusting the distance between the first clamping roller 119 and the second clamping roller 120.

[0051] A drive wheel 126 is provided at the other end of the first clamping roller 119, and a driven wheel 127 is provided at the end of the second clamping roller 120. The drive wheel 126 and the driven wheel 127 are connected by a belt, and the drive wheel 126 and the driven wheel 127 are connected by a cross belt drive.

[0052] A tensioning wheel 128 is also provided on the second guide block 125. Specifically, a guide groove is provided on the second guide block 125, and the tensioning wheel 128 is slidably disposed inside the guide groove. When it is necessary to adjust the distance between the first clamping roller 119 and the second clamping roller 120, the tension of the belt is adjusted by sliding the tensioning wheel 128 up and down.

[0053] Furthermore, the drive device 121 uses an electric motor to drive the first clamping roller 119 to rotate.

[0054] Furthermore, two sets of clamping components are provided, and the two sets of clamping components are respectively located inside the housing 118.

[0055] like Figure 4 As shown, the crushing device is the core of the crushing assembly, mainly composed of a rotating shaft 300, a mounting plate 400, a mounting column 500, a crushing head 600, and a motor. Its function is to crush the concrete block after it has been clamped and fixed.

[0056] The mounting plate 400 adopts a circular structure and is made of Q345 steel. It is connected to the rotating shaft 300 via a key, and a locating pin is provided between the mounting plate 400 and the rotating shaft 300 to ensure their relative fixation. Five to ten mounting plates 400 are evenly arranged on the rotating shaft 300, with a distance of 50-100 mm between adjacent mounting plates 400. This arrangement allows the crushing head 600 to crush the concrete block from all directions during rotation.

[0057] The mounting column 500 adopts a cylindrical or square structure and is fixed to the mounting plate 400 by welding. Each mounting plate 400 is evenly provided with 4 mounting columns 500, and the included angle between the mounting columns 500 is 90 degrees, which can ensure that the crushing head 600 is subjected to uniform force during rotation.

[0058] The crushing head 600 consists of a connecting part 116 and a crushing part 117. The connecting part 116 is rotatably connected to the mounting column 500, and a bearing is installed inside the connecting part 116 to ensure the flexible rotation of the crushing head 600. The crushing part 117 is made of high-chromium cast iron and has been quenched to a hardness of HRC60-65, exhibiting good wear resistance and impact toughness.

[0059] Furthermore, the shape of the crushing part 117 can be selected according to actual use. For example, the crushing part 117 can be set as a cone with a cone angle of 60 degrees and a sharp tooth at the top with a height of 15 mm, which can effectively crush concrete blocks.

[0060] The crushing heads 600 are staggered on multiple mounting columns 500. The crushing heads 600 on adjacent mounting columns 500 are offset by 50 mm in the axial direction. This arrangement enables the crushing heads 600 to crush the concrete blocks from multiple angles and in all directions during rotation, thereby improving crushing efficiency and crushing effect.

[0061] A receiving cavity 115 is formed between adjacent mounting plates 400. The height of the receiving cavity 115 is 300 mm and the diameter is approximately the same as the width of the crushing head 600. When the crushing head 600 is unable to crush the concrete block, the crushing head 600 is squeezed into the receiving cavity 115 by the rotation of the connecting part 116 under the reaction force of the concrete block, which prevents the crushing head 600 from being damaged due to excessive force and also prevents the equipment from jamming.

[0062] like Figure 5 As shown, a spray system is installed inside the crushing assembly to simultaneously clean the concrete blocks, removing dust and impurities from their surface. The spray system consists of spray pipes and nozzles.

[0063] The spray pipes are arranged on the inner wall of the crushing unit. The pipe diameter is 25 mm. Spray nozzles are evenly arranged on the spray pipes. The spray nozzles are fan-shaped and have a spray angle of 120 degrees. The working pressure is 0.3-0.5 MPa, which can spray water evenly on the concrete blocks to ensure the cleaning effect.

[0064] Specifically, the spray assembly is located in the middle of the two crushing devices and is used to clean the concrete blocks that have been clamped.

[0065] Furthermore, the spray assembly is mounted on the housing 118, and there are two sets of spray assemblies, which are respectively mounted on both sides of the housing 118.

[0066] The spraying assembly works in conjunction with the crushing device. When the crushing device is started, the spraying assembly starts at the same time, continuously cleaning the concrete blocks during the crushing process. The wastewater after cleaning is discharged through the drain at the bottom of the crushing assembly. The drain is connected to a wastewater treatment device for wastewater treatment and recycling, thus saving water resources.

[0067] A discharge port 129 is provided below the crushing assembly to discharge the crushed concrete blocks into the screening assembly. The screening assembly is used to screen, grade, and magnetically separate the crushed concrete blocks, and mainly consists of a screening cylinder 700, a rotating frame 800, a drive assembly, and an electromagnet 900.

[0068] The screening cylinder 700 is welded from stainless steel, with a diameter of 1.2 meters and a length of 3 meters. The wall thickness of the screening cylinder 700 is 5 millimeters, providing excellent corrosion resistance and wear resistance. The screening cylinder 700 is equipped with sieve holes, the diameter of which can be set to three specifications: 5 millimeters, 10 millimeters, or 20 millimeters, as needed.

[0069] Furthermore, a discharge hopper 130 is provided below the screening cylinder 700, which is used to discharge the screened concrete blocks.

[0070] An electromagnet 900 is installed inside the screening cylinder 700 to perform magnetic separation on the crushed concrete blocks, separating out metallic impurities. The electromagnet 900 has a strip-shaped structure, is 2.5 meters long, 100 millimeters wide, and 50 millimeters thick, and is made of electrical pure iron. The surface of the electromagnet 900 is covered with an insulating layer made of epoxy resin, 2 millimeters thick, to prevent leakage. The electromagnet 900 is embedded inside the screening cylinder 700, ensuring sufficient attraction force for the metallic impurities in the concrete blocks.

[0071] Electromagnet 900 is connected to the control system, which can control its switching on and off as needed. When electromagnet 900 is energized, it generates a strong magnetic field that attracts metallic impurities in the concrete blocks. After the concrete screening is complete, electromagnet 900 is disconnected, thereby discharging the metallic impurities attracted inside the screening cylinder 700.

[0072] The drive assembly, used to rotate the screening cylinder 700, consists of a drive motor 110, a gear 112, a chain 111, and external gears. The drive motor 110 is a three-phase asynchronous motor with a power of 5.5 kW and a speed of 1450 rpm. It is connected to the gear 112 through a reducer with a reduction ratio of 1:100, which can provide sufficient torque to the gear 112.

[0073] Gear 112 is forged from 45# steel, with a module of 5 and 20 teeth. Gear 112 is connected to the output shaft of the reducer via a key, the key being 16×80. Chain 111 is a roller chain, model 16A-1. The length of chain 111 is determined according to the circumference of the screening cylinder 700. Chain 111 meshes with the gear 112 and the external teeth on the outer wall of the screening cylinder 700, enabling it to transmit the power of the drive motor 110 to the screening cylinder 700, thus driving the screening cylinder 700 to rotate.

[0074] The outer teeth are set on the outer wall of the screening cylinder 700 and fixed by welding. The material of the outer teeth is 40Cr steel, which has been quenched and the hardness reaches HRC50-55. The module of the outer teeth is 5 and the number of teeth is 100. They are evenly distributed on the outer wall of the screening cylinder 700 and cooperate with the chain 111 to ensure the rotation accuracy of the screening cylinder 700.

[0075] The rotation speed of the screening cylinder 700 can be adjusted by the drive motor 110, with an adjustment range of 5-15 revolutions per minute. This can be adjusted according to the particle size of the concrete blocks and the screening requirements, thereby improving screening efficiency and quality.

[0076] The working process of the concrete recycling device of the present invention mainly includes concrete block feeding, clamping, crushing, washing, screening and grading, and magnetic separation. Each step works closely together to achieve efficient recycling of concrete blocks. The specific working principle is as follows:

[0077] First, operators feed the concrete blocks to be recycled into the feed hopper 200 using a forklift or manually. The feed hopper 200's wider-than-bottom design facilitates the smooth sliding of the concrete blocks, preventing blockages. During the feeding process, the feed hopper 200 remains closed. When a certain number of concrete blocks are collected in the feed hopper 200, it opens, and the concrete blocks enter the clamping area of ​​the crushing assembly under gravity.

[0078] The opening degree of the feed hopper 200 can be adjusted according to the size of the concrete block and the feeding speed. When the concrete block is large, the opening degree of the feed hopper 200 is increased to speed up the feeding speed; when the concrete block is small, the opening degree of the feed hopper 200 is reduced to prevent too much concrete block from entering the clamping area and affecting the clamping effect.

[0079] Once the concrete block enters the clamping area, the clamping assembly begins operation. When the first clamping roller 119 and the second clamping roller 120 contact the concrete block, the control system determines the clamping force by detecting changes in the current of the drive motor 110. When the clamping force reaches the set value, the drive motor 110 adjusts its speed to maintain stable clamping. The set value of the clamping force can be adjusted according to the hardness of the concrete block. For harder concrete blocks, the clamping force is appropriately increased to ensure a firm clamping.

[0080] After the concrete block is stably clamped, the crushing device begins operation. The control system starts the crushing motor, which drives the rotating shaft 300 to rotate via a coupling. The rotating shaft 300 then drives the crushing head 600 on the mounting plate 400 and mounting column 500 to rotate together. The rotation speed of the crushing head 600 can be adjusted according to the hardness of the concrete block. For harder concrete blocks, the rotation speed is reduced to increase the crushing torque; for softer concrete blocks, the rotation speed is increased to improve crushing efficiency.

[0081] During rotation, the crushing head 600 contacts the concrete block and impacts and compresses it through the crushing section 117, breaking the concrete block into smaller particles. Because the crushing heads 600 are staggered on multiple mounting columns 500 and the distance between adjacent mounting plates 400 is reasonable, the crushing heads 600 can crush the concrete block from multiple angles and in all directions, ensuring the crushing effect.

[0082] When encountering a difficult-to-crush concrete block, the crushing head 600, under the reaction force of the concrete block, moves towards the receiving cavity 115 through the rotation of the connecting part 116, squeezing into the receiving cavity 115. This prevents the crushing head 600 from being damaged due to excessive force and also prevents the equipment from jamming. After the crushing head 600 passes over the difficult-to-crush concrete block, under the action of centrifugal force, the crushing head 600 returns to its original position and continues to crush other concrete blocks.

[0083] While the crushing device is operating, the spraying assembly starts simultaneously. The control system controls the water pump to operate, which draws water from the storage tank and delivers it to the spray nozzles through the spray pipes. The nozzles then spray water evenly onto the concrete blocks in a fan-shaped mist to clean them.

[0084] The water spray volume of the spray unit can be adjusted according to the crushing progress. In the early stage of crushing, the concrete blocks are larger and there is more dust and impurities on the surface, so the water spray volume should be increased appropriately. In the later stage of crushing, the concrete blocks have been crushed into smaller particles and there is less dust and impurities on the surface, so the water spray volume should be reduced appropriately to save water resources.

[0085] After the crushed concrete blocks enter the screening cylinder 700, the drive assembly begins to operate. The control system starts the drive motor 110, which drives the gear 112 to rotate via a reducer. The gear 112 then drives the chain 111 to rotate, and the chain 111 meshes with the external teeth on the outer wall of the screening cylinder 700, causing the screening cylinder 700 to rotate. The rotation speed of the screening cylinder 700 is adjusted according to the particle size of the concrete blocks and the screening requirements, generally controlled at 5-15 revolutions per minute.

[0086] As the screening cylinder 700 rotates, fine particles from the concrete block fall through the sieve holes into the collection trough below the screening cylinder 700, while larger particles continue to move forward. The concrete block is gradually screened during this movement.

[0087] Concrete particles smaller than 20 mm pass through the screen holes and fall into the corresponding collection tank through the discharge hopper 130. Concrete particles larger than 20 mm are discharged from the end of the screening cylinder 700 and returned to the crushing assembly for further crushing.

[0088] As the screening cylinder 700 rotates, the internal electromagnet 900 is energized, generating a strong magnetic field. When metallic impurities in the concrete block pass near the electromagnet 900, they are attracted to the surface of the electromagnet 900 under the influence of the magnetic field, thus separating the metallic impurities from the concrete block.

[0089] Once all the concrete blocks have been processed, the operator issues a stop command through the control system, and the various components of the equipment stop working in a specific sequence. First, the feed hopper 200 closes, stopping the feeding; then, the crushing motor and spraying assembly stop working; next, the drive motor 110 and the electromagnet 900 stop working.

[0090] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0091] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for recycling concrete, characterized in that: Includes the following steps: The concrete block is fed into the feed hopper (200) and clamped and fixed by the clamping assembly below the feed hopper (200); Start the crushing device and use the rotating shaft (300) to drive the crushing head (600) on the mounting plate (400) and the mounting column (500) to rotate, so that the crushing head (600) comes into contact with the concrete block to complete the crushing; During the crushing process, the concrete blocks are simultaneously cleaned using a spray system. The crushed concrete blocks are discharged into the screening assembly through the discharge port (129); The screening cylinder (700) of the drive screening component rotates, and the crushed concrete blocks are magnetically separated by the electromagnet (900) inside the screening cylinder (700). The concrete blocks are screened by the screen holes on the screening cylinder (700) to obtain recycled material.

2. A concrete recycling device, characterized in that: The apparatus is used to implement the method of claim 1. The apparatus includes a support (100), a feed hopper (200), a crushing component, and a screening component; wherein the feed hopper (200) is connected to the crushing component, the feed hopper (200) and the crushing component are disposed on one side of the support (100), the screening component is disposed on the other side of the support (100), and the crushing component is connected to the screening component. The crushing assembly includes a housing (118), an adjustable clamping assembly, and a crushing device; wherein the clamping assembly and the crushing device are both located inside the housing (118); the clamping assembly is located above the crushing device and is used to clamp the concrete in the feed hopper (200) and crush the concrete through the crushing device; then the crushed concrete is discharged into the screening assembly through the discharge port (129) located below the crushing assembly; The crushing device includes a rotating shaft (300) with several mounting discs (400) fixedly connected to it. Mounting columns (500) are mounted on the mounting discs (400), and crushing heads (600) are mounted on the mounting columns (500). The crushing heads (600) are connected to the mounting columns (500). A motor drives the rotating shaft (300) to rotate, which in turn drives the crushing heads (600). The crushing heads (600) then contact the concrete blocks, thus crushing them.

3. The concrete recycling device according to claim 2, characterized in that: The screening assembly includes a screening cylinder (700), a rotating frame (800), and a drive assembly; wherein the rotating frame (800) is fixedly connected to the support (100), the screening cylinder (700) is rotatably connected to the rotating frame (800), and the drive assembly drives the screening cylinder (700) to rotate, thereby completing the screening of the crushed concrete.

4. A concrete recycling device according to claim 3, characterized in that: An electromagnet (900) is installed inside the screening cylinder (700), and a sieve hole is provided on the screening cylinder (700). The crushed concrete is magnetically separated by the electromagnet (900), and the sieve hole is used to filter out smaller concrete blocks after crushing.

5. A concrete recycling device according to claim 4, characterized in that: The drive assembly includes a drive motor (110) and a chain (111); the drive motor (110) drives the chain (111) to rotate by connecting with a gear (112). The chain (111) is set on the outer wall of the screening cylinder (700) and is provided with external teeth on the outer wall of the screening cylinder (700), thereby driving the screening cylinder (700) to rotate.

6. A concrete recycling device according to claim 5, characterized in that: A rotating groove (113) is also provided on the outer wall of the screening cylinder (700). The rotating groove (113) cooperates with the rotating wheel (114) provided on the rotating frame (800) for the rotation of the screening cylinder (700).

7. A concrete recycling device according to claim 2, characterized in that: The mounting plate (400) is provided with multiple mounting columns (500) evenly arranged, and the crushing head (600) is staggered on the multiple mounting columns (500).

8. A concrete recycling device according to claim 7, characterized in that: A receiving cavity (115) is formed between adjacent mounting plates (400). When the crushing head (600) is unable to crush the concrete block, the crushing head (600) is squeezed into the receiving cavity (115) to avoid jamming when the crushing head (600) is unable to crush the concrete block.

9. A concrete recycling device according to claim 8, characterized in that: The crushing head (600) includes a connecting part (116) and a crushing part (117), wherein the connecting part (116) is rotatably connected to the mounting column (500), and the crushing part (117) is fixedly connected to the connecting part (116).

10. A concrete recycling device according to claim 9, characterized in that: Inside the crushing unit is a spray system used to clean the concrete blocks.

Images