A device and method for recycling waste concrete aggregate

Abstract

This invention provides a device and method for recycling waste concrete aggregate, relating to the field of comprehensive utilization technology of construction waste. It includes: a recycling box assembly and a crushing assembly; the recycling box assembly includes a box body with a partition connected inside, the partition having a set of feeding troughs, a conical cover connected to the box body corresponding to the partition, the conical cover being fixedly connected to a processing cylinder, and the processing cylinder being fixedly connected to a converging cover; the crushing assembly includes symmetrical extrusion plates, the lower side of which is in close contact with the upper side of the partition. This invention addresses the shortcomings of existing technologies by developing a device and method for recycling waste concrete aggregate. This invention utilizes extrusion plates to crush concrete in one pass, leaving larger reinforcing bars on the upper side of the partition. Moving and fixed blades further crush the concrete blocks into particles, a perforated magnetic plate separates smaller reinforcing bars, and a perforated screening plate achieves particle screening.

Description

Technical Field

[0001] This invention relates to the field of comprehensive utilization technology of construction waste, and in particular to a device and method for recycling waste concrete aggregate. Background Technology

[0002] Recycling waste concrete aggregate is an important way to achieve resource utilization and sustainable development of construction waste. After crushing and screening, waste concrete can yield recycled aggregate of different particle sizes. This recycled aggregate can be used to produce recycled concrete, which is widely used in building and road engineering. The mechanical properties and durability of recycled concrete can be improved by optimizing the mix proportion and adding admixtures. Recycled aggregate can also be used to produce recycled bricks, decorative bricks, permeable bricks, and other building materials. These recycled building materials not only have properties similar to natural materials but are also lower in cost and more environmentally friendly. Recycled aggregate can be used in road base materials; its fatigue resistance and erosion resistance have been systematically studied and applied in practical engineering projects.

[0003] Existing technologies, such as the invention of a method for preparing ultra-high performance concrete using recycled aggregate from construction waste (authorization publication number CN118515446B), involve pre-treating the construction waste, including crushing the waste concrete with a hammer and then separating the metal and reinforcing steel bars using a magnetic sorting device.

[0004] Currently, there is a lack of equipment that can easily crush and pulverize waste concrete, separate the reinforcing steel, and classify the particles according to size.

[0005] Therefore, in order to address the above problems, a device and method for recycling waste concrete aggregate are proposed to solve these problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention develops a device and method for recycling waste concrete aggregates. This invention utilizes an extrusion plate to crush concrete in one compression, leaving larger reinforcing bars on the upper side of the plate. The movable and fixed blades further crush the concrete blocks into particles, a perforated magnetic plate separates smaller reinforcing bars, and a perforated sieve plate achieves particle sieving.

[0007] The technical solution to the technical problem solved by this invention is as follows: This invention provides a device and method for recycling waste concrete aggregate, including: a recycling box assembly and a crushing assembly; the recycling box assembly includes a box body, a partition connected inside the box body, a set of feeding troughs provided on the partitions, the box body and the partitions forming a primary crushing chamber, the partitions controlling the uniform falling of the coarsely crushed aggregate through the feeding troughs, a conical hood connected to the box body corresponding to the partitions, the conical hood being fixedly connected to a processing cylinder, the processing cylinder being fixedly connected to a convergence hood, the conical hood → processing cylinder → convergence hood forming a secondary crushing channel for the aggregate, the conical hood guiding the material into the processing cylinder, and the convergence hood outputting the final crushed product; The crushing assembly includes symmetrical extrusion plates, with their lower sides closely attached to the upper side of the partition plate to ensure complete coarse crushing. During the crushing of concrete blocks, larger reinforcing bars are temporarily stored between the two extrusion plates. The concrete is collected after a certain processing time. The symmetrical extrusion plates are connected to guide U-frames, which pass through the housing. The guide U-frames restrict the movement trajectory of the extrusion plates, ensuring horizontal extrusion stability. The crushing assembly includes a crushing tube shaft connected to a set of fixed blades, which are positioned inside the processing cylinder and rotate to finely crush the falling aggregate. The recycling housing assembly and the crushing assembly achieve the recycling of waste concrete aggregate. The housing, partition plate, feed chute, conical hood, processing cylinder, and convergence hood in the recycling housing assembly together form a complete processing channel for guiding the flow and processing of aggregate. The extrusion plates in the crushing assembly are used for initial crushing of the aggregate, while the fixed blades further crush the aggregate within the processing cylinder.

[0008] As an optimization, a power assembly is also included, comprising a motor providing core driving force. The motor is connected to the housing via a motor bracket, and its output shaft is connected to a main shaft. The main shaft bearing is connected to the housing, and the main shaft is connected to an external drive gear. The housing bearing is connected to the central shaft of the external driven gear, which meshes with the external driven gear. The housing is connected to symmetrical guide rods, which pass through sliders to ensure vertical movement and prevent lateral deviation. The eccentric portion of the external driven gear is rotatably connected to the lower end of the power arm, and the upper end of the power arm is rotatably connected to the corresponding slider. The symmetrical sliders are connected to L-bars, and the symmetrical L-bars are rotatably connected to symmetrical... The device comprises a swing arm, each rotatably connected to a corresponding guide U-frame. The main shaft, through the meshing of external power gears and external driven gears, converts rotational motion into eccentric motion, which is then transmitted to the guide U-frames to drive the extrusion plate in reciprocating motion. The housing and the conical cover are connected to a round-headed square box via mounting rods. The main shaft passes through the conical cover, and its bearing connects to the round-headed square box. The main shaft is connected to a driving bevel gear, and the round-headed square box bearing connects to the hollow shaft of a lower bevel gear. The hollow shaft of the lower bevel gear is also connected to the round-headed square box, and the lower bevel gear meshes with the driving bevel gear. The hollow shaft of the lower bevel gear connects to the crushing tube shaft. The rotation of the fixed blade is achieved through bevel gear meshing. The power assembly provides power support for the device's operation. The motor, through the main shaft and a series of gear transmissions, drives the external driven gears and the power arm, thereby driving the slider, L-bar, and swing arm to move, ultimately realizing the reciprocating motion of the extrusion plate. Meanwhile, the main shaft drives the crushing tube shaft to rotate through the meshing of the active and lower bevel gears, which in turn drives the fixed blades to crush the aggregate. In addition, the power unit is connected to the housing and conical cover via a mounting rod and a round-headed square box, enhancing the overall structural stability of the device.

[0009] As an optimization, the round-headed square box bearing connects to the central shaft of the upper bevel gear. The upper bevel gear meshes with the driving bevel gear. The central shaft of the upper bevel gear is provided with a spline groove, and a spline shaft is provided within the spline groove. The spline shaft connects to a vertical shaft, which passes through the hollow shaft of the lower bevel gear and the crushing tube shaft. The vertical shaft connects to a U-shaped blade. Through the cooperation of the spline groove and the spline shaft, power is transmitted to the vertical shaft, driving the U-shaped blade to rotate. The U-shaped blade is in close contact with the wall of the processing cylinder to prevent material adhesion. The U-shaped blade is connected to a set of movable blades, which are staggered with a set of fixed blades. The staggered distribution of the movable and fixed blades creates a shearing effect, improving the fine crushing efficiency. By adding the upper bevel gear, spline shaft, vertical shaft, U-shaped blade, and movable blade, the structure of the crushing component becomes more complex and efficient. The upper bevel gear meshes with the driving bevel gear, and through the transmission of the spline shaft and vertical shaft, it drives the U-shaped blade and movable blade to rotate within the processing cylinder, staggering with the fixed blade, further improving the aggregate crushing effect. This allows the aggregates to undergo more thorough shearing and grinding within the processing cylinder, improving the quality of aggregate recycling.

[0010] As an optimization, a triangular plate is provided between the partition and the conical cover. The triangular plate is connected to the main shaft protection plate, which protects the main shaft from material contamination or wear. The spline shaft is connected to a limiting circular plate, which restricts the axial displacement of the spline shaft to ensure stable rotation of the vertical shaft. The triangular plate is provided with a limiting groove corresponding to the limiting circular plate. The limiting circular plate is connected to the triangular plate by a bearing. The main shaft is connected to an internal power gear. The round-headed square box is connected to the central shaft of the internal driven gear by a bearing. The internal driven gear meshes with the internal power gear. The eccentric part of the internal driven gear is rotatably connected to a rocker arm. The rocker arm is rotatably connected to the triangular plate. The triangular plate is connected to a set of guide rods. The set of guide rods passes through the conical cover and drives the triangular plate to swing back and forth. The guide rods maintain the motion trajectory and prevent material from accumulating above the round-headed square box.

[0011] As an optimization, each of the triangular plates is equipped with a set of push rods corresponding to each feeding trough. Adjacent sets of push rods are staggered, with the distance between any two push rods greater than the width of the feeding trough. This staggered distribution and spacing prevents trough blockage and promotes smooth material flow. By setting push rods on the triangular plates, they can cooperate with the feeding troughs to further divert and guide the aggregate. The staggered distribution and spacing of adjacent push rods ensure that the aggregate can pass smoothly through the feeding troughs, improving aggregate processing efficiency. Even if concrete blocks remain between the push rods, the triangular plates move along the height direction, and after accumulation, the triangular plates and partitions crush them. The direction of movement of the compression plate is along the length of the feeding trough, maximizing the compression area.

[0012] As an optimization, a screening assembly is also included. The screening assembly includes a screening frame connected to symmetrical rotating shafts. The housing is connected to symmetrical mounting vertical rods. The symmetrical rotating shafts are rotatably connected to the corresponding mounting vertical rods. The screening frame is connected to a power rod. One of the L-shaped rods is rotatably connected to a long connecting rod. The long connecting rod is rotatably connected to the power rod. The screening frame is driven to swing through the long connecting rod. The linkage power assembly requires no additional power. The upper part of the screening frame is connected to a perforated magnetic plate to attract smaller steel bars and metals. The lower part of the screening frame is connected to a perforated screening plate. The screening frame is fixedly connected to a coarse material guide chute corresponding to the perforated screening plate. The screening frame is fixedly connected to a fine material guide chute corresponding to its bottom plate.

[0013] As an optimization, L-shaped brackets are connected to the four corners of the housing to support it. Each L-shaped bracket is connected to a mounting base to fix the device to the ground or other supporting structure. This enhances the overall stability and installation reliability of the device, facilitating its installation and use.

[0014] A method for using a waste concrete aggregate recycling device includes the following steps: S1: Preheat waste concrete with warm water or other methods to cause the mortar in the concrete block to crack. S2: Turn on the motor to move the extrusion plate, rotate the fixed blade, and rotate and move the U-shaped blade and the movable blade simultaneously; S3: The concrete block is placed into the box by manual labor or by using equipment; S4: The extrusion plate is used to initially crush the aggregate. Larger steel bars are placed between the two extrusion plates for temporary storage. The machine is stopped and collected after a period of concrete processing. S5: The U-shaped blade is close to the inner wall of the processing cylinder to prevent material adhesion. The movable blade and the fixed blade are staggered to form a shearing action, improve the crushing efficiency, and form particles.

[0015] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. The above technical solutions have the following advantages or beneficial effects: This device recycles waste concrete aggregate through a process of heating and extrusion → multi-stage crushing → magnetic separation and screening: Coarse crushing stage: Extrusion plates heat and crush large pieces of concrete, while baffles control the particle size. Fine crushing stage: Fixed and movable blades shear and crush, creating a high-efficiency crushing zone within the processing cylinder. Sorting stage: Screening components separate small-sized reinforcing bars and metal impurities, grading the aggregate and outputting directly usable recycled material. It integrates heating, extrusion, shearing, and screening functions; the mechanical linkage design reduces energy consumption, and the protective structure extends equipment lifespan.

[0016] This device employs multi-stage crushing technology, achieving highly efficient crushing of aggregates through the staggered distribution of fixed and movable blades. Simultaneously, the screening component is designed to classify recycled aggregates, meeting the needs of different application scenarios. This multi-stage crushing and screening technology is innovative in the field of waste concrete aggregate recycling.

[0017] This device enhances its overall stability and durability through structures such as triangular plates, spindle guards, L-shaped brackets, and mounting bases. These protective and stabilizing structural designs effectively protect critical components from damage, extend the device's service life, and improve its reliability and usability.

[0018] This device organically combines extrusion crushing, multi-stage grinding, heat treatment, and screening functions to form a complete waste concrete aggregate recycling system. This comprehensive design effectively improves the recycling quality and efficiency of aggregates, enabling their reuse in building materials and resulting in significant economic and environmental benefits. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a partially cut-out three-dimensional structural diagram of the regeneration box assembly of the present invention.

[0022] Figure 3 This is a partially cut-out three-dimensional structural diagram of the present invention.

[0023] Figure 4 This is a partial three-dimensional structural diagram of the crushing component and power component of the present invention.

[0024] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the crushing component of the present invention. Figure 1 .

[0025] Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the crushing component of the present invention. Figure 2 .

[0026] Figure 7 This is a partial three-dimensional structural diagram of the crushing component of the present invention.

[0027] Figure 8 This is a partially cut-away three-dimensional structural diagram of the screening component of the present invention.

[0028] In the picture: 1. Recycling box assembly; 11. Mounting base; 12. L-bracket; 13. Box body; 14. Guide vertical rod; 15. Partition; 16. Discharge chute; 17. Conical cover; 18. Processing cylinder; 19. Converging cover; 110. Mounting vertical rod; 111. Round-headed square box; 112. Mounting rod. 2. Crushing assembly; 21. Extrusion plate; 22. Guide U-frame; 23. Internal driving gear; 24. Internal driven gear; 25. Rocker arm; 26. Main shaft guard plate; 27. Push rod; 28. Triangular plate; 29. ​​Limiting groove; 210. Guide round rod; 211. Crushing tube shaft; 212. Fixed blade; 213. Lower bevel gear; 214. Driving bevel gear; 215. Upper bevel gear; 216. Limiting round plate; 217. Splined shaft; 218. U-shaped blade; 219. Movable blade; 220. Vertical shaft; 3. Power assembly; 31. Motor; 32. Swing arm; 33. Long connecting rod; 34. Slider; 35. L-bar; 36. Power arm; 37. External driven gear; 38. External power gear; 39. Main shaft; 4. Screening assembly; 41. Screening frame; 42. Perforated magnetic plate; 43. Perforated screening plate; 44. Fine material guide chute; 45. Rotary shaft; 46. Power rod; 47. Coarse material guide chute. Detailed Implementation

[0029] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] like Figures 1 to 8As shown in Embodiment 1: A device and method for recycling waste concrete aggregate, comprising: a recycling chamber assembly 1 and a crushing assembly 2; the recycling chamber assembly 1 includes a chamber 13, with a partition 15 connected inside the chamber 13, and a set of feeding troughs 16 provided on the partition 15. The chamber 13 and the partition 15 form a primary crushing chamber. The partition 15 controls the uniform falling of the coarsely crushed aggregate through the feeding troughs 16. The chamber 13 is connected to a conical shroud 17 corresponding to the partition 15. The conical shroud 17 is fixedly connected to a processing cylinder 18, and the processing cylinder 18 is fixedly connected to a converging shroud 19. The conical shroud 17 → processing cylinder 18 → converging shroud 19 form a secondary crushing channel for the aggregate. The conical shroud 17 guides the material into the processing cylinder 18, and the converging shroud 19 outputs the final crushed product; the crushing... Component 2 includes symmetrical extrusion plates 21, with the lower side of each extrusion plate 21 closely attached to the upper side of the partition plate 15 to ensure complete coarse crushing. During the crushing of concrete blocks, larger reinforcing bars are temporarily stored between the two extrusion plates 21. The concrete is collected after processing for a period of time. The symmetrical extrusion plates 21 are respectively connected to guide U-frames 22, which pass through the box body 13. The guide U-frames 22 restrict the movement trajectory of the extrusion plates 21, ensuring horizontal extrusion stability. The crushing component 2 includes a crushing tube shaft 211, which is connected to a set of fixed blades 212. The set of fixed blades 212 is located inside the processing cylinder 18 and rotates inside the processing cylinder 18 to finely crush the falling aggregate. The recycling box component 1 and the crushing component 2 realize the recycling treatment of waste concrete aggregate. The recycling chamber assembly 1, consisting of chamber 13, partition 15, feed chute 16, conical cover 17, processing cylinder 18, and convergence cover 19, forms a complete processing channel for guiding the flow and processing of aggregates. The crushing assembly 2, with its extrusion plate 21 for initial crushing of the aggregates, and a fixed blade 212 for further crushing within the processing cylinder 18, further crushes the aggregates.

[0031] The extrusion plate 21 has a heating function, which softens the asphalt or binder in the concrete, improves crushing efficiency, and enhances the recycling effect of aggregates.

[0032] The side walls of the housing 13 are thickened corresponding to the extrusion plate 21 to enhance compressive strength, prevent deformation of the housing when the extrusion plate 21 is working, and enhance the stability and durability of the device.

[0033] It also includes a power assembly 3, which includes a motor 31 providing core driving force. The motor 31 is connected to the housing 13 via a motor bracket. The output shaft of the motor 31 is connected to a main shaft 39. The main shaft 39 is connected to the housing 13 via a bearing. The main shaft 39 is connected to an external power gear 38. The housing 13 is connected to the central shaft of an external driven gear 37 via a bearing. The external power gear 38 meshes with the external driven gear 37. The housing 13 is connected to symmetrical guide vertical rods 14, which pass through sliders 34 to ensure vertical movement of the sliders 34 and prevent lateral deviation. The eccentric part of the external driven gear 37 is rotatably connected to the lower end of a power arm 36. The upper end of the power arm 36 is rotatably connected to the corresponding slider 34. The symmetrical sliders 34 are connected to L-bars 35, and the symmetrical L-bars 35 are rotatably connected to symmetrical swing arms 32. Each of the... The swing arms 32 are rotatably connected to the corresponding guide U-frames 22. The main shaft 39 meshes with the external driven gear 37 through the external power gear 38, converting the rotational motion into eccentric motion, which is then transmitted to the guide U-frames 22 to drive the extrusion plate 21 to reciprocate. The housing 13 and the conical cover 17 are respectively connected to the round-headed square box 111 through the mounting rod 112. The main shaft 39 passes through the conical cover 17 and is bearing-connected to the round-headed square box 111. The main shaft 39 is connected to the driving bevel gear 214, and the round-headed square box 111 is bearing-connected to the hollow shaft of the lower bevel gear 213. The hollow shaft of the lower bevel gear 213 is bearing-connected to the round-headed square box 111, and the lower bevel gear 213 meshes with the driving bevel gear 214. The hollow shaft of the lower bevel gear 213 is connected to the crushing tube shaft 211. By using bevel gear meshing, the rotation of the fixed blade 212 is achieved. The power assembly 3 provides power support for the operation of the device. The motor 31 drives the external driven gear 37 and the power arm 36 through the main shaft 39 and a series of gears, thereby driving the slider 34, L-bar 35 and swing arm 36 to move, ultimately realizing the reciprocating motion of the extrusion plate 21. At the same time, the main shaft 39 drives the crushing tube shaft 211 to rotate through the meshing of the driving bevel gear 214 and the lower bevel gear 213, driving the fixed blade 212 to crush the aggregate. In addition, the power assembly 3 is also connected to the housing 13 and the conical cover 17 through the mounting rod 112 and the round-headed square box 111, which enhances the overall structural stability of the device.

[0034] The four corners of the housing 13 are connected to L-shaped brackets 12 for supporting the housing. Each L-shaped bracket 12 is connected to a mounting base 11 for fixing the device to the ground or other supporting structure. This enhances the overall stability and installation reliability of the device, and facilitates its installation and use.

[0035] The workflow of this embodiment is as follows: The waste concrete is preheated with warm water or other methods to cause the mortar in the concrete block to crack.

[0036] When motor 31 is turned on, it drives the main shaft 39, the external power gear 38, and the driving bevel gear 214 to rotate. The external power gear 38 drives the external driven gear 37 to rotate, and the external driven gear 37 drives the power arm 36 to swing. The power arm 36 drives a slider 34 to move along the guide vertical rod 14. The slider 34 drives an L-rod 35 to move. The L-rod 35 drives one side of the power arm 36 to swing. One side of the power arm 36 drives the guide U-frame 22 to move. The guide U-frame 22 drives the other side of the power arm 36 to swing. The other side of the power arm 36 drives another L-rod 35 to move. The other L-rod 35 drives another slider 34 to move along the guide vertical rod 14. The guide U-frame 22 drives the extrusion plate 21 to move. The driving bevel gear 214 drives the lower bevel gear 213, the crushing tube shaft 211, and the fixed blade 212 to rotate.

[0037] Concrete blocks are placed into the housing 13 manually or using equipment. When two extrusion plates 21 approach each other, they compress the concrete block between them. When the extrusion plates 21 move away from each other, they compress the concrete block against the housing 13. This process ensures that when the concrete block is smaller than the width of the discharge chute 16, it falls as a small concrete piece, leaving most of the reinforcing steel bars on the upper side of the partition 15. The reinforcing steel bars are removed periodically. The small concrete pieces are then crushed again upon contact with the rotating fixed blade 212.

[0038] Example 2: This example further elaborates on Example 1. The round-headed square box 111 is connected to the central shaft of the upper bevel gear 215 by a bearing. The upper bevel gear 215 meshes with the driving bevel gear 214. The central shaft of the upper bevel gear 215 is provided with a spline groove, and a spline shaft 217 is provided in the spline groove. The spline shaft 217 is connected to a vertical shaft 220. The vertical shaft 220 passes through the hollow shaft of the lower bevel gear 213 and the crushing tube shaft 211. The vertical shaft 220 is connected to a U-shaped blade 218. Through the cooperation of the spline groove and the spline shaft 217, power is transmitted to the vertical shaft 220 to drive the U-shaped blade 218 to rotate. The U-shaped blade 218 is in close contact with the cylinder wall of the processing cylinder 18 to prevent material adhesion. The U-shaped blade 218 is connected to a set of movable blades 219. The set of movable blades 219 and the set of fixed blades 212 are staggered. The staggered distribution of the movable blades 219 and the fixed blades 212 forms a shearing action, improving the crushing efficiency. By adding an upper bevel gear 215, a splined shaft 217, a vertical shaft 220, a U-shaped blade 218, and a movable blade 219, the structure of the crushing assembly becomes more complex and efficient. The upper bevel gear 215 meshes with the driving bevel gear 214, and through the transmission of the splined shaft 217 and the vertical shaft 220, drives the U-shaped blade 218 and the movable blade 219 to rotate within the processing cylinder 18. These blades are staggered with the fixed blade 220, further improving the crushing effect of the aggregate. This allows the aggregate to undergo more thorough shearing and grinding within the processing cylinder 18, improving the quality of aggregate recycling.

[0039] A triangular plate 28 is provided between the partition 15 and the conical cover 17. The triangular plate 28 is connected to the main shaft protection plate 26, which protects the main shaft 39 from material contamination or wear. The spline shaft 217 is connected to a limiting circular plate 216, which restricts the axial displacement of the spline shaft 217 to ensure stable rotation of the vertical shaft 220. The triangular plate 28 is provided with a limiting groove 29 corresponding to the limiting circular plate 216. The limiting circular plate 216 is bearing-connected to the triangular plate 28. The main shaft 39 is connected to the inner moving part. The inner driven gear 24 is connected to the central shaft of the inner driven gear 24 by the bearing of the round-headed square box 111. The inner driven gear 24 meshes with the inner driven gear 23. The eccentric part of the inner driven gear 24 is rotatably connected to the rocker arm 25. The rocker arm 25 is rotatably connected to the triangular plate 28. The triangular plate 28 is connected to a set of guide rods 210. The set of guide rods 210 pass through the conical cover 17 respectively, driving the triangular plate 28 to swing back and forth. The guide rods 210 maintain the movement trajectory and prevent material from accumulating above the round-headed square box 111.

[0040] The triangular plate 28 is located directly above the round-headed square box 111. During the processing, it protects the round-headed square box 111 and the mounting rod 112, preventing crushed concrete blocks from falling onto the round-headed square box 111 and the mounting rod 112.

[0041] The spindle protection plate 26 is disposed above the spindle 39 to protect the spindle 39 and prevent crushed concrete blocks from falling onto the spindle 39.

[0042] A protective tube can be installed on the outside of the spindle 39 to achieve multiple layers of protection.

[0043] The workflow of this embodiment is as follows: When motor 31 rotates, main shaft 39 drives internal drive gear 23 to rotate, internal drive gear 23 drives internal driven gear 24 to rotate, internal driven gear 24 drives triangular plate 28 to move along the height direction, triangular plate 28 drives guide rod 210 and main shaft guard plate 26 to move, triangular plate 28 drives limiting plate 216 to reciprocate, limiting plate 216 drives spline shaft 217 to move along spline groove, spline shaft 217 drives vertical shaft 220, U-shaped blade 218 and movable blade 219 to move along the height direction. Driving bevel gear 214 drives upper bevel gear 215, spline shaft 217, limiting plate 216, vertical shaft 220, U-shaped blade 218 and movable blade 219 to rotate. Movable blade 219 rotates in the opposite direction to fixed blade 212, resulting in better crushing effect and turning small concrete blocks into particles.

[0044] Example 3: This example further elaborates on Example 1 or 2. Each set of top rods 27 is provided on the triangular plate 28 corresponding to each feeding trough 16. Adjacent sets of top rods 27 are staggered, with the distance between any two top rods 27 greater than the width of the feeding trough 16. This staggered distribution and spacing prevents trough blockage and promotes smooth material flow. By setting top rods 27 on the triangular plate 28, the top rods 27 can cooperate with the feeding trough 16 to further divert and guide the aggregate. The staggered distribution and spacing design of adjacent top rods 27 ensures that the aggregate can pass smoothly through the feeding trough 16, improving aggregate processing efficiency. Even if concrete blocks remain between the top rods 27, the triangular plate 28 moves along the height direction, and after accumulation, the triangular plate 28 and the partition plate 15 crush them. The movement direction of the extrusion plate 21 is along the length direction of the feeding trough 16, maximizing the extrusion area.

[0045] The workflow of this embodiment is as follows: Triangular plate 28 drives push rod 27 to move along the height direction. When push rod 27 enters the discharge trough 16, it pushes out the concrete block remaining in the discharge trough 16 to prevent the discharge trough 16 from being blocked.

[0046] Example 4: This example is a further elaboration based on Example 1, 2, or 3, and also includes a screening component 4. The screening component 4 includes a screening frame 41, which is connected to symmetrical rotating shafts 45. The housing 13 is connected to symmetrical mounting vertical rods 110. The symmetrical rotating shafts 45 are rotatably connected to the corresponding mounting vertical rods 110. The screening frame 41 is connected to a power rod 46. One L-shaped rod 35 is rotatably connected to a long connecting rod 33. The long connecting rod 33 is rotatably connected to the power rod 46. The long connecting rod 33 drives the screening frame 41 to swing. The linkage power component 3 does not require additional power. The upper part of the screening frame 41 is connected to a perforated magnetic plate 42 to attract smaller steel bars and metals. The lower part of the screening frame 41 is connected to a perforated screening plate 43. The screening frame 41 is fixedly connected to the coarse material guide trough 47 corresponding to the perforated screening plate 43. The screening frame 41 is fixedly connected to the fine material guide trough 44 corresponding to its bottom plate.

[0047] The diameter of the holes on the perforated sieve plate 43 is smaller than the diameter of the holes on the perforated magnetic plate 42.

[0048] The workflow of this embodiment is as follows: A L-shaped rod 35 drives a long connecting rod 33 to swing, which in turn drives a power rod 46 to swing. The power rod 46 then drives a screening frame 41 to swing, which in turn drives a rotating shaft 45 to rotate. The screening frame 41 then drives a perforated magnetic plate 42, a perforated screening plate 43, a coarse material guide chute 47, and a fine material guide chute 44 to swing. Particles fall from the collecting cover 19 onto the perforated magnetic plate 42. Some small steel bars remain on the perforated magnetic plate 42, while larger particles remain on the perforated screening plate 43 and flow out of the coarse material guide chute 47. Small particles remain on the bottom plate of the screening frame 41 and flow out of the fine material guide chute 44.

[0049] A method for using a waste concrete aggregate recycling device includes the following steps: S1: Preheat waste concrete with warm water or other methods to cause the mortar in the concrete block to crack. S2: Turn on the motor 31 to move the extrusion plate 21, rotate the fixed blade 212, and rotate and move the U-shaped blade 218 and the movable blade 219 simultaneously. S3: The concrete block is placed into the box 13 manually or using equipment; S4: The extrusion plate 21 is used to perform preliminary extrusion and crushing of aggregates. Larger steel bars are placed between the two extrusion plates 21 for temporary storage. The machine is stopped and collected after a period of concrete processing. S5: The U-shaped blade 218 is closely attached to the inner wall of the processing cylinder 18 to prevent material adhesion. The movable blade 219 and the fixed blade 212 are staggered to form a shearing action, improve the crushing efficiency, and form particles.

[0050] This device recycles waste concrete aggregate through a process of heating and extrusion → multi-stage crushing → magnetic separation and screening: Coarse crushing stage: Extrusion plate 21 heats and crushes large pieces of concrete, while baffle 15 controls the particle size. Fine crushing stage: Fixed blade 212 and movable blade 219 shear and crush, forming a high-efficiency crushing zone within the processing cylinder 18. Sorting stage: Screening component 4 separates small-sized reinforcing bars and metal impurities and grades the aggregate, outputting directly usable recycled material. It integrates heating, extrusion, shearing, and screening functions; the mechanical linkage design reduces energy consumption, and the protective structure extends equipment life.

[0051] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A device for recycling waste concrete aggregate, characterized in that, include: Recycling box assembly (1) and crushing assembly (2); The recycling box assembly (1) includes a box (13), a partition (15) is connected inside the box (13), a set of feeding troughs (16) is provided on the partition (15), a conical cover (17) is connected to the box (13) corresponding to the partition (15), the conical cover (17) is fixedly connected to the processing cylinder (18), and the processing cylinder (18) is fixedly connected to the convergence cover (19). The crushing component (2) includes symmetrical extrusion plates (21), the lower side of which is close to the upper side of the partition (15), and the symmetrical extrusion plates (21) are respectively connected to guide U-frames (22), and the symmetrical guide U-frames (22) pass through the box body (13). The crushing assembly (2) includes a crushing tube shaft (211), which is connected to a set of fixed blades (212), and the set of fixed blades (212) is disposed inside the processing cylinder (18); It also includes a power assembly (3), which includes a motor (31). The motor (31) is connected to the housing (13) via a motor bracket. The output shaft of the motor (31) is connected to a main shaft (39). The main shaft (39) is connected to the housing (13) via a bearing. The main shaft (39) is connected to an external power gear (38). The housing (13) is connected to the central shaft of an external driven gear (37) via a bearing. The external power gear (38) meshes with the external driven gear (37). The housing (13) is connected to symmetrical guide rods (14). The symmetrical guide rods (14) pass through sliders (34). The eccentric part of the external driven gear (37) is rotatably connected to the lower end of the power arm (36). The upper end of the power arm (36) is rotatably connected to the corresponding slider (34). The symmetrical sliders (34) are connected to L rods ( 35), the symmetrical L rods (35) are rotatably connected to the symmetrical swing arms (32), each swing arm (32) is rotatably connected to the corresponding guide U frame (22), the box body (13) and the conical cover (17) are respectively connected to the round-headed square box (111) through the mounting rod (112), the main shaft (39) passes through the conical cover (17), the main shaft (39) is connected to the round-headed square box (111) by bearing, the main shaft (39) is connected to the active bevel gear (214), the round-headed square box (111) is connected to the hollow shaft of the lower bevel gear (213) by bearing, the hollow shaft of the lower bevel gear (213) is connected to the round-headed square box (111) by bearing, the lower bevel gear (213) meshes with the active bevel gear (214), and the hollow shaft of the lower bevel gear (213) is connected to the crushing tube shaft (211). The round-headed square box (111) is connected to the central shaft of the upper bevel gear (215) by a bearing. The upper bevel gear (215) meshes with the driving bevel gear (214). The central shaft of the upper bevel gear (215) is provided with a spline groove. A spline shaft (217) is provided in the spline groove. The spline shaft (217) is connected to a vertical shaft (220). The vertical shaft (220) passes through the hollow shaft of the lower bevel gear (213) and the crushing tube shaft (211). The vertical shaft (220) is connected to a U-shaped blade (218). The U-shaped blade (218) is in close contact with the wall of the processing cylinder (18). The U-shaped blade (218) is connected to a set of movable blades (219). The set of movable blades (219) and the set of fixed blades (212) are staggered. A triangular plate (28) is provided between the partition plate (15) and the conical cover (17). The triangular plate (28) is connected to the main shaft protection plate (26). The spline shaft (217) is connected to the limiting circular plate (216). The triangular plate (28) is provided with a limiting groove (29) corresponding to the limiting circular plate (216). The limiting circular plate (216) is connected to the triangular plate (28) by a bearing. The main shaft (39) is connected to the internal power gear (23). The round-headed square box (111) is connected to the central shaft of the internal driven gear (24) by a bearing. The internal driven gear (24) meshes with the internal power gear (23). The eccentric part of the internal driven gear (24) is rotatably connected to the rocker arm (25). The rocker arm (25) is rotatably connected to the triangular plate (28). The triangular plate (28) is connected to a set of guide rods (210). The set of guide rods (210) passes through the conical cover (17) respectively. The triangular plate (28) is provided with a set of top rods (27) for each of the feeding grooves (16). The two sets of top rods (27) are staggered, and the distance between any two top rods (27) is greater than the width of the feeding groove (16).

2. The waste concrete aggregate recycling device according to claim 1, characterized in that: The four corners of the housing (13) are connected to L brackets (12), and each L bracket (12) is connected to a mounting base (11).

3. The method of using the waste concrete aggregate recycling device according to claim 1, characterized in that, Includes the following steps: S1: Preheat the waste concrete with warm water to cause the mortar in the concrete block to crack. S2: Turn on the motor (31) to move the extrusion plate (21), rotate the fixed blade (212), and rotate and move the U-shaped blade (218) and the movable blade (219) simultaneously; S3: The concrete block is placed into the box (13) manually or using equipment. S4: The extrusion plate (21) is used to perform preliminary extrusion and crushing of aggregates. Larger steel bars are placed between the two extrusion plates (21) for temporary storage. The machine is stopped and collected after a period of concrete processing. S5: The U-shaped blade (218) is close to the inner wall of the processing cylinder (18) to prevent material from adhering. The movable blade (219) and the fixed blade (212) are staggered to form a shearing action, improve the crushing efficiency, and form particles.

Images