Construction waste crushing and recycling apparatus

Abstract

This invention discloses a construction waste crushing and recycling device, belonging to the field of construction waste treatment technology. It includes a crushing mechanism for crushing construction waste, a screening mechanism for screening the crushed construction waste, and a collection mechanism for extracting and collecting metal scrap from the construction waste. By setting up a return blade shaft, screening disc, and spiral blade structure, materials larger than the aperture on the screening disc can be automatically conveyed upwards by the return blade shaft back to the stationary and moving crushing cylinders for further crushing, forming a closed-loop crushing system and improving the overall crushing efficiency. This invention utilizes a linkage mechanism consisting of a rotating disk, an upper gear, and a central gear to adsorb metal materials before they enter the crushing zone, preventing the metal from being mixed with aggregates after crushing and difficult to separate. Combined with the inclined structure of the blocking block inside the scraper box, the adsorbed metal can be automatically scraped down into the metal box, achieving separate collection of metal materials.

Description

Technical Field

[0001] This invention relates to the field of construction waste treatment technology, and in particular to a construction waste crushing and reuse equipment. Background Technology

[0002] Construction waste, such as discarded concrete, bricks, wood, and metal components, is generated in large quantities during urban construction and demolition. If not effectively treated, it not only occupies land resources but also pollutes the environment. In recent years, with the advancement of the construction of a resource-saving and environmentally friendly society, the resource-based reuse of construction waste has received increasing attention.

[0003] Currently, common construction waste treatment equipment mainly includes crushers, screening machines, and magnetic separators. The general process is as follows: first, the construction waste is coarsely or medium-crushed by a crushing mechanism; then, materials of different particle sizes are classified using a screening device; and finally, metallic materials are separated using methods such as magnetic separation. However, existing equipment still has the following shortcomings in practical applications.

[0004] Limited recycling capacity means traditional screening devices struggle to automatically return materials that don't meet particle size requirements to the crushing zone for further crushing, often requiring external conveying equipment or manual intervention. This results in discontinuous processing, high energy consumption, and low efficiency. Metal recovery is incomplete and easily contaminated in subsequent processes. While some equipment includes magnetic separation, it's often located after crushing, allowing metal materials to be broken into fine particles and mixed into the aggregate, increasing separation difficulty. Furthermore, the simple design of metal collection structures makes secondary metal spillage or mixing with non-metallic materials common. Insufficient dust control is another issue. Construction waste crushing generates significant amounts of dust, and existing equipment lacks effective negative pressure dust extraction and collection devices, negatively impacting the operating environment and personnel health. Crushing, metal extraction, and re-crushing are often handled by different equipment, resulting in low system integration, large footprint, and high maintenance costs.

[0005] To address the aforementioned issues, there is an urgent need for a construction waste crushing and recycling equipment that integrates crushing, metal extraction, recycling crushing, and dust removal during the crushing process. This would improve the resource utilization rate of construction waste, reduce processing costs, and improve the working environment. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention adopts the following technical solution: a construction waste crushing and recycling device, comprising an outer cylinder and a crushing mechanism for crushing construction waste, wherein the outer cylinder is provided with a screening mechanism for screening the crushed construction waste and a collection mechanism for extracting and collecting metal waste from the construction waste. The crushing mechanism includes an upper connecting frame fixedly installed inside the outer cylinder, a fixed crushing cylinder fixedly installed below the upper connecting frame, and a movable crushing cylinder rotatably installed inside the outer cylinder.

[0007] Furthermore, the crushing mechanism also includes an upper cover rotatably mounted above the outer cylinder and a lower cover rotatably mounted below the outer cylinder. A lower connecting frame is fixedly installed inside the outer cylinder, and a screening disc is fixedly installed on the lower connecting frame. The screening disc has multiple holes of the same size. Support legs are fixedly installed below the outer cylinder.

[0008] Furthermore, the crushing mechanism also includes a rotary drum gear and an upper gear fixedly installed on the moving crushing drum. A crushing motor and a reducer are fixedly installed on the outer cylinder. The motor shaft of the crushing motor is connected to the reducer. An input gear is fixedly installed on the output end of the reducer. A transmission gear is rotatably installed on the side of the outer cylinder. A side bevel gear is fixedly installed on the transmission gear through a shaft. The side bevel gear meshes with the rotary drum gear, and the transmission gear meshes with the input gear.

[0009] Furthermore, the crushing mechanism also includes multiple external crushing teeth disposed on the inner wall of the moving crushing cylinder, and multiple internal crushing teeth disposed on the outer wall of the fixed crushing cylinder.

[0010] When in use, first open the top cover and put the small pieces of construction waste to be processed into the outer cylinder. The construction waste is put in between the outer cylinder and the fixed crushing cylinder. Then, the construction waste slides down the guide ring slope onto the rotating disk. Then, the construction waste slides along the arc surface of the rotating disk to between the moving crushing cylinder and the fixed crushing cylinder. The crushing motor drives the input gear to rotate through the reducer. The input gear drives the transmission gear and the side bevel gear to rotate. The side bevel gear drives the rotating drum gear, the moving crushing cylinder and the upper gear to rotate. The construction waste that reaches between the fixed crushing cylinder and the moving crushing cylinder is crushed by the inner crushing teeth and the outer crushing teeth. Then, the crushed construction waste falls onto the screening disc.

[0011] Furthermore, the screening mechanism includes a return blade shaft rotatably mounted below the upper connecting frame. The return blade shaft is located in the fixed crushing cylinder. The bottom of the spiral blades on the return blade shaft is in contact with the upper surface of the screening disc. A central drive wheel is fixedly mounted at the bottom of the return blade shaft.

[0012] Furthermore, the screening mechanism also includes a conveying motor and a side reducer fixedly installed on the outer cylinder. The motor shaft of the conveying motor is connected to the side reducer. A conveying gear is fixedly installed on the output end of the side reducer. A mating gear and a lower transmission wheel are rotatably installed on the outer cylinder. A lower side bevel gear is fixedly installed on the lower transmission wheel. A transmission wheel is fixedly installed on the mating gear. A vertical transmission belt is wound around the transmission wheel on the mating gear and the lower transmission wheel. A bottom transmission wheel is rotatably installed inside the outer cylinder. A bottom bevel gear is fixedly installed on the bottom transmission wheel. The lower side bevel gear meshes with the bottom bevel gear. A bottom transmission belt is wound around the bottom transmission wheel and the middle transmission wheel.

[0013] The conveyor motor drives the conveyor gear to rotate via a side reducer. The conveyor gear drives the mating gear and the transmission wheel on the mating gear to rotate. The transmission wheel on the mating gear drives the lower transmission wheel and the lower side bevel gear to rotate via a vertical transmission belt. The lower side bevel gear drives the bottom bevel gear and the bottom transmission wheel to rotate. The bottom transmission wheel drives the middle transmission wheel and the return blade shaft to rotate via a bottom transmission belt. When the return blade shaft rotates, the bottom of the spiral blades of the return blade shaft pushes the crushed construction waste accumulated on the screening disc. Waste smaller than the size of the holes on the screening disc falls from the screening disc into the lower cover below. Waste larger than the size of the holes on the screening disc is conveyed upward by the return blade shaft, passing through the inner wall of the fixed crushing cylinder to the top of the fixed crushing cylinder. Then the waste falls out from the top of the fixed crushing cylinder and falls again between the fixed crushing cylinder and the moving crushing cylinder. The waste is crushed again by the inner and outer crushing teeth until the waste smaller than the size of the holes on the screening disc falls into the lower cover below the screening disc. When it is necessary to remove the crushed waste, the lower cover can be opened.

[0014] Furthermore, the collecting mechanism includes a rotating disk rotatably mounted on the outside of the fixed crushing cylinder. The rotating disk is supported by magnetic material, and a central gear is fixedly mounted on the rotating disk. Multiple intermediate gears are rotatably mounted inside the outer cylinder. The intermediate gears mesh with the central gear and with the upper gear. The upper surface of the rotating disk is a conical surface.

[0015] Furthermore, the collection mechanism also includes a guide ring slope fixedly installed inside the outer cylinder. The guide ring slope is annular and its upper surface is a slope. A scraping box is fixedly installed inside the outer cylinder. A blocking block is fixedly installed inside the scraping box. The blocking block has an inclined surface. The lower surface of the blocking block is in contact with the conical surface of the upper surface of the rotating disk. A metal box is installed on the outer cylinder. A switch plate is installed on the metal box. The metal box is located outside the scraping box. An exhaust pipe is installed on the outer cylinder. An exhaust fan is fixedly installed on the exhaust pipe.

[0016] When the moving crushing drum rotates, the upper gear drives the intermediate gear, which in turn drives the rotating disk. When construction waste falls onto the surface of the rotating disk, the disk adsorbs the metal material within the waste, preventing it from slipping between the stationary and moving crushing drums. Since the construction waste fed into the equipment consists of small pieces, there is no issue of the rotating disk failing to hold the metal material due to its size or weight. The rotating disk carries the metal material clockwise. When the rotating disk carrying the metal material enters the scraping box and encounters the inclined surface of the blocking block... Upon contact, the inclined surface of the blocking block will block the metal material, preventing it from continuing to follow the rotating disk. Guided by the inclined surface of the blocking block, the metal material will leave the rotating disk along the inclined surface of the blocking block and slide into the metal box. When it is necessary to remove the metal material, simply turn on the switch. Due to the presence of the scraping box, non-metallic construction waste falling from the guide ring slope will not directly enter the scraping box, but will fall onto the rotating disk and slide along the arc surface of the rotating disk between the fixed crushing cylinder and the moving crushing cylinder. Only the metal material adsorbed by the rotating disk will enter the scraping box.

[0017] A collection bag is installed at the outer end of the exhaust fan. The exhaust fan draws air through the exhaust pipe to extract the dust generated by the crushing inside the outer cylinder and collects it in the collection bag.

[0018] The beneficial effects of this invention compared with the prior art are: (1) By setting up a return blade shaft, a screening disc and a spiral blade structure, the material larger than the aperture on the screening disc can be automatically conveyed upward by the return blade shaft back to the fixed crushing cylinder and the moving crushing cylinder for further crushing. No external conveying equipment or manual intervention is required, forming a closed-loop circulation crushing system, avoiding material accumulation and blockage, ensuring the uniformity of the output particle size, and improving the overall crushing efficiency; (2) This invention utilizes a linkage mechanism composed of a rotating disk and an upper gear and a middle gear to adsorb metal materials before the material enters the crushing zone, avoiding the metal from being mixed into the aggregate after crushing and difficult to separate. With the inclined structure of the blocking block in the scraping box, the adsorbed material can be further desorbed. The attached metal is automatically scraped into the metal box, realizing efficient, continuous and pure collection of metal materials and improving the resource recovery rate; (3) The invention is equipped with an exhaust pipe and exhaust fan on the outer cylinder, which can extract the dust generated during the crushing process and send it into the collection bag in real time, effectively reducing dust leakage, reducing pollution to the health of operators and the surrounding environment, and meeting the requirements of environmental protection operation; (4) The invention integrates crushing, metal extraction, automatic return and re-crushing and dust removal functions in the same outer cylinder, with a compact structure and small footprint. Through the opening design of the upper and lower covers, it is convenient to feed and discharge materials, simple to control and easy to maintain, and suitable for continuous and automated operation at the construction waste treatment site. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention (internal).

[0021] Figure 3 This is a schematic diagram of the crushing mechanism of the present invention. Figure 1 .

[0022] Figure 4 This is a schematic diagram of the crushing mechanism of the present invention. Figure 2 .

[0023] Figure 5 This is a schematic diagram of the screening mechanism of the present invention. Figure 1 .

[0024] Figure 6 This is a schematic diagram of the screening mechanism of the present invention. Figure 2 .

[0025] Figure 7 This is a schematic diagram of the collection mechanism structure of the present invention. Figure 1 .

[0026] Figure 8 This is a schematic diagram of the collection mechanism structure of the present invention. Figure 2 .

[0027] Reference numerals: 101-Outer cylinder; 102-Support leg; 103-Upper connecting frame; 104-Fixed crushing cylinder; 105-Moving crushing cylinder; 106-Screening disc; 107-Lower connecting frame; 108-Inner crushing tooth; 109-Outer crushing tooth; 110-Crushing motor; 111-Transmission gear; 112-Rotating drum gear; 113-Upper end gear; 114-Reducer; 115-Input gear; 116-Side bevel gear; 201-Return blade shaft; 202-Vertical transmission belt; 203-Lower side bevel gear; 2 04-Lower drive wheel; 205-Bottom bevel gear; 206-Bottom drive wheel; 207-Bottom drive belt; 208-Middle drive wheel; 209-Conveyor motor; 210-Side reducer; 211-Conveyor gear; 212-Matching gear; 301-Rotating disk; 302-Middle transfer gear; 303-Center gear; 304-Metal box; 305-Switch panel; 306-Scraper box; 307-Guide ring slope; 308-Blocking block; 309-Exhaust fan; 310-Exhaust duct; 4-Upper cover; 5-Lower cover. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0029] Example: Reference Figures 1-8A construction waste crushing and recycling device includes an outer cylinder 101 and a crushing mechanism for crushing construction waste. The outer cylinder 101 is provided with a screening mechanism for screening the crushed construction waste and a collection mechanism for extracting and collecting metal waste from the construction waste. The crushing mechanism includes an upper connecting frame 103 fixedly installed inside the outer cylinder 101, a fixed crushing cylinder 104 fixedly installed below the upper connecting frame 103, and a movable crushing cylinder 105 rotatably installed inside the outer cylinder 101.

[0030] like Figure 3 , Figure 4 As shown, the crushing mechanism also includes an upper cover 4 rotatably mounted above the outer cylinder 101 and a lower cover 5 rotatably mounted below the outer cylinder 101. A lower connecting frame 107 is fixedly installed inside the outer cylinder 101. A screening disc 106 is fixedly installed on the lower connecting frame 107. The screening disc 106 is provided with multiple holes of the same size. A support leg 102 is fixedly installed below the outer cylinder 101.

[0031] like Figure 3 , Figure 4 As shown, the crushing mechanism also includes a rotary drum gear 112 and an upper end gear 113 fixedly installed on the moving crushing drum 105. A crushing motor 110 and a reducer 114 are fixedly installed on the outer cylinder 101. The motor shaft of the crushing motor 110 is connected to the reducer 114. An input gear 115 is fixedly installed on the output end of the reducer 114. A transmission gear 111 is rotatably installed on the side of the outer cylinder 101. A side bevel gear 116 is fixedly installed on the transmission gear 111 through a shaft. The side bevel gear 116 meshes with the rotary drum gear 112, and the transmission gear 111 meshes with the input gear 115.

[0032] like Figure 3 , Figure 4 As shown, the crushing mechanism also includes multiple external crushing teeth 109 disposed on the inner wall of the moving crushing cylinder 105, and multiple internal crushing teeth 108 disposed on the outer wall of the fixed crushing cylinder 104.

[0033] In operation, the top cover 4 is first opened, and the small pieces of construction waste to be processed are placed into the outer cylinder 101. The construction waste is placed between the outer cylinder 101 and the fixed crushing cylinder 104. Then, the construction waste slides down the guide ring slope 307 onto the rotating disk 301. Subsequently, the construction waste slides along the arc surface of the rotating disk 301 to the space between the moving crushing cylinder 105 and the fixed crushing cylinder 104. The crushing motor 110 drives the input gear 115 to rotate through the reducer 114. The input gear 115 drives the transmission gear 111 and the side bevel gear 116 to rotate. The side bevel gear 116 drives the rotating drum gear 112, the moving crushing cylinder 105 and the upper gear 113 to rotate. The construction waste that reaches the space between the fixed crushing cylinder 104 and the moving crushing cylinder 105 is crushed by the inner crushing teeth 108 and the outer crushing teeth 109. The crushed construction waste then falls onto the screening disk 106.

[0034] like Figure 5 , Figure 6 As shown, the screening mechanism includes a return blade shaft 201 rotatably mounted below the upper connecting frame 103. The return blade shaft 201 is located in the fixed crushing cylinder 104. The bottom of the spiral blades on the return blade shaft 201 is in contact with the upper surface of the screening disc 106. A central drive wheel 208 is fixedly mounted on the bottom of the return blade shaft 201.

[0035] like Figure 5 , Figure 6 As shown, the screening mechanism also includes a conveying motor 209 and a side reducer 210 fixedly installed on the outer cylinder 101. The motor shaft of the conveying motor 209 is connected to the side reducer 210. A conveying gear 211 is fixedly installed on the output end of the side reducer 210. A mating gear 212 and a lower transmission wheel 204 are rotatably installed on the outer cylinder 101. A lower side bevel gear 203 is fixedly installed on the lower transmission wheel 204. A transmission wheel is fixedly installed on the mating gear 212. A vertical transmission belt 202 is wound around the transmission wheel on the mating gear 212 and the lower transmission wheel 204. A bottom transmission wheel 206 is rotatably installed inside the outer cylinder 101. A bottom bevel gear 205 is fixedly installed on the bottom transmission wheel 206. The lower side bevel gear 203 meshes with the bottom bevel gear 205. A bottom transmission belt 207 is wound around the bottom transmission wheel 206 and the middle transmission wheel 208.

[0036] The conveyor motor 209 drives the conveyor gear 211 to rotate via the side reducer 210. The conveyor gear 211 drives the docking gear 212 and the transmission wheel on the docking gear 212 to rotate. The transmission wheel on the docking gear 212 drives the lower transmission wheel 204 and the lower side bevel gear 203 to rotate via the vertical transmission belt 202. The lower side bevel gear 203 drives the bottom bevel gear 205 and the bottom transmission wheel 206 to rotate. The bottom transmission wheel 206 drives the middle transmission wheel 208 and the return blade shaft 201 to rotate via the bottom transmission belt 207. When the return blade shaft 201 rotates, the bottom of the spiral blades of the return blade shaft 201 pushes the crushed construction waste accumulated on the screening disc 106, separating large and small waste. Waste material with holes in the screening disc 106 falls from the screening disc 106 into the lower cover 5 below. Waste material larger than the holes in the screening disc 106 will be returned to the impeller 201 and conveyed upwards, passing through the inner wall of the fixed crushing cylinder 104 to the top of the fixed crushing cylinder 104. Then the waste material falls out from the top of the fixed crushing cylinder 104 and falls again between the fixed crushing cylinder 104 and the moving crushing cylinder 105. The waste material is crushed again by the inner crushing teeth 108 and the outer crushing teeth 109 until the waste material smaller than the holes in the screening disc 106 falls into the lower cover 5 below the screening disc 106. When it is necessary to remove the crushed waste material, the lower cover 5 can be opened.

[0037] like Figure 7 , Figure 8 As shown, the collection mechanism includes a rotating disk 301 rotatably mounted on the outside of the fixed crushing cylinder 104. The rotating disk 301 is supported by magnetic material. A central gear 303 is fixedly mounted on the rotating disk 301. Multiple intermediate gears 302 are rotatably mounted inside the outer cylinder 101. The intermediate gears 302 mesh with the central gear 303 and with the upper gear 113. The upper surface of the rotating disk 301 is a conical surface.

[0038] like Figure 7 , Figure 8 As shown, the collection mechanism also includes a guide ring slope 307 fixedly installed inside the outer cylinder 101. The guide ring slope 307 is annular, and its upper surface is a slope. A scraping box 306 is fixedly installed inside the outer cylinder 101. A blocking block 308 is fixedly installed inside the scraping box 306. The blocking block 308 has an inclined surface, and its lower surface is in contact with the conical surface of the upper surface of the rotating disk 301. A metal box 304 is installed on the outer cylinder 101. A switch plate 305 is installed on the metal box 304. The metal box 304 is located outside the scraping box 306. An exhaust pipe 310 is installed on the outer cylinder 101, and an exhaust fan 309 is fixedly installed on the exhaust pipe 310.

[0039] When the moving crushing drum 105 rotates, the upper gear 113 drives the intermediate gear 302 to rotate, which in turn drives the rotating disk 301 to rotate. When construction waste falls onto the upper surface of the rotating disk 301, the disk adsorbs the metal material within the waste, preventing it from slipping between the fixed crushing drum 104 and the moving crushing drum 105. Since the construction waste placed in the equipment is in small pieces, there is no situation where the rotating disk 301 cannot hold the metal material due to its excessive size or weight. The rotating disk 301 rotates clockwise with the metal material. When the rotating disk 301 carrying the metal material enters the scraping box 306 and contacts the inclined surface of the blocking block 308, it continues to rotate. The inclined surface of the blocking block 308 will block the metal material, preventing it from continuing to move with the rotating disk 301. Guided by the inclined surface of the blocking block 308, the metal material will leave the rotating disk 301 along the inclined surface of the blocking block 308 and slide into the metal box 304. When it is necessary to remove the metal material, the switch plate 305 can be turned on. Due to the existence of the scraping box 306, the non-metallic construction waste falling from the guide ring slope 307 will not directly enter the scraping box 306, but will fall onto the rotating disk 301 and slide along the arc surface of the rotating disk 301 between the fixed crushing cylinder 104 and the moving crushing cylinder 105. Only the metal material adsorbed by the rotating disk 301 will enter the scraping box 306.

[0040] A collection bag is provided at the outer end of the exhaust fan 309. The exhaust fan 309 draws air and extracts the dust generated by the crushing inside the outer cylinder 101 through the exhaust pipe 310, and draws the dust into the collection bag for collection.

[0041] The working principle of the construction waste crushing and recycling equipment disclosed in this invention is as follows: When in use, first open the top cover 4 and put the small pieces of construction waste to be processed into the outer cylinder 101. The construction waste is put in between the outer cylinder 101 and the fixed crushing cylinder 104. Then, the construction waste slides down the guide ring slope 307 onto the rotating disk 301. Then, the construction waste slides along the arc surface of the rotating disk 301 to the space between the moving crushing cylinder 105 and the fixed crushing cylinder 104. The crushing motor 110 drives the input gear 115 to rotate through the reducer 114. The input gear 115 drives the transmission gear 111 and the side bevel gear 116 to rotate. The side bevel gear 116 drives the rotating drum gear 112, the moving crushing cylinder 105 and the upper gear 113 to rotate. The construction waste that reaches the space between the fixed crushing cylinder 104 and the moving crushing cylinder 105 is crushed by the inner crushing teeth 108 and the outer crushing teeth 109. Then, the crushed construction waste falls onto the screening disk 106.

[0042] When the moving crushing drum 105 rotates, the upper gear 113 drives the intermediate gear 302 to rotate, which in turn drives the rotating disk 301 to rotate. When construction waste falls onto the upper surface of the rotating disk 301, the disk adsorbs the metal material within the waste, preventing it from slipping between the fixed crushing drum 104 and the moving crushing drum 105. Since the construction waste placed in the equipment is in small pieces, there is no situation where the rotating disk 301 cannot hold the metal material due to its excessive size or weight. The rotating disk 301 rotates clockwise with the metal material. When the rotating disk 301 carrying the metal material enters the scraping box 306 and contacts the inclined surface of the blocking block 308, it continues to rotate. The inclined surface of the blocking block 308 will block the metal material, preventing it from continuing to move with the rotating disk 301. Guided by the inclined surface of the blocking block 308, the metal material will leave the rotating disk 301 along the inclined surface of the blocking block 308 and slide into the metal box 304. When it is necessary to remove the metal material, the switch plate 305 can be turned on. Due to the existence of the scraping box 306, the non-metallic construction waste falling from the guide ring slope 307 will not directly enter the scraping box 306, but will fall onto the rotating disk 301 and slide along the arc surface of the rotating disk 301 between the fixed crushing cylinder 104 and the moving crushing cylinder 105. Only the metal material adsorbed by the rotating disk 301 will enter the scraping box 306.

[0043] The conveyor motor 209 drives the conveyor gear 211 to rotate via the side reducer 210. The conveyor gear 211 drives the docking gear 212 and the transmission wheel on the docking gear 212 to rotate. The transmission wheel on the docking gear 212 drives the lower transmission wheel 204 and the lower side bevel gear 203 to rotate via the vertical transmission belt 202. The lower side bevel gear 203 drives the bottom bevel gear 205 and the bottom transmission wheel 206 to rotate. The bottom transmission wheel 206 drives the middle transmission wheel 208 and the return blade shaft 201 to rotate via the bottom transmission belt 207. When the return blade shaft 201 rotates, the bottom of the spiral blades of the return blade shaft 201 pushes the crushed construction waste accumulated on the screening disc 106, separating large and small waste. Waste material with holes in the screening disc 106 falls from the screening disc 106 into the lower cover 5 below. Waste material larger than the holes in the screening disc 106 will be returned to the impeller 201 and conveyed upwards, passing through the inner wall of the fixed crushing cylinder 104 to the top of the fixed crushing cylinder 104. Then the waste material falls out from the top of the fixed crushing cylinder 104 and falls again between the fixed crushing cylinder 104 and the moving crushing cylinder 105. The waste material is crushed again by the inner crushing teeth 108 and the outer crushing teeth 109 until the waste material smaller than the holes in the screening disc 106 falls into the lower cover 5 below the screening disc 106. When it is necessary to remove the crushed waste material, the lower cover 5 can be opened.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A construction waste crushing recycling apparatus comprising an outer cylinder (101) and a crushing mechanism for crushing construction waste, characterized by: The outer cylinder (101) is equipped with a screening mechanism for screening the crushed construction waste and a collection mechanism for extracting and collecting the metal waste in the construction waste. The crushing mechanism includes an upper connecting frame (103) fixedly installed inside the outer cylinder (101), a fixed crushing cylinder (104) fixedly installed below the upper connecting frame (103), and a movable crushing cylinder (105) rotatably installed inside the outer cylinder (101).

2. The construction waste crushing and recycling equipment according to claim 1, characterized in that: The crushing mechanism also includes an upper cover (4) rotatably mounted above the outer cylinder (101) and a lower cover (5) rotatably mounted below the outer cylinder (101). A lower connecting frame (107) is fixedly installed inside the outer cylinder (101). A screening disc (106) is fixedly installed on the lower connecting frame (107). The screening disc (106) has multiple holes of the same size. A support leg (102) is fixedly installed below the outer cylinder (101).

3. The construction waste crushing and recycling equipment according to claim 2, characterized in that: The crushing mechanism also includes a rotary drum gear (112) and an upper gear (113) fixedly installed on the moving crushing drum (105). A crushing motor (110) and a reducer (114) are fixedly installed on the outer cylinder (101). The motor shaft of the crushing motor (110) is connected to the reducer (114). An input gear (115) is fixedly installed on the output end of the reducer (114). A transmission gear (111) is rotatably installed on the side of the outer cylinder (101). A side bevel gear (116) is fixedly installed on the transmission gear (111) through a shaft. The side bevel gear (116) meshes with the rotary drum gear (112), and the transmission gear (111) meshes with the input gear (115).

4. The construction waste crushing and recycling equipment according to claim 1, characterized in that: The crushing mechanism also includes multiple external crushing teeth (109) disposed on the inner wall of the moving crushing cylinder (105), and multiple internal crushing teeth (108) disposed on the outer wall of the fixed crushing cylinder (104).

5. The construction waste crushing and recycling equipment according to claim 2, characterized in that: The screening mechanism includes a return blade shaft (201) rotatably mounted below the upper connecting frame (103). The return blade shaft (201) is located in the fixed crushing cylinder (104). The bottom of the spiral blades on the return blade shaft (201) is in contact with the upper surface of the screening disc (106). A middle drive wheel (208) is fixedly mounted on the bottom of the return blade shaft (201).

6. The construction waste crushing and recycling equipment according to claim 5, characterized in that: The screening mechanism also includes a conveying motor (209) and a side reducer (210) fixedly installed on the outer cylinder (101). The motor shaft of the conveying motor (209) is connected to the side reducer (210). A conveying gear (211) is fixedly installed on the output end of the side reducer (210). A mating gear (212) and a lower transmission wheel (204) are rotatably installed on the outer cylinder (101). A lower side bevel gear (203) is fixedly installed on the lower transmission wheel (204). A transmission wheel is fixedly installed on the connecting gear (212). A vertical transmission belt (202) is wrapped around the transmission wheel on the connecting gear (212) and the lower transmission wheel (204). A bottom transmission wheel (206) is rotatably installed inside the outer cylinder (101). A bottom bevel gear (205) is fixedly installed on the bottom transmission wheel (206). The lower bevel gear (203) meshes with the bottom bevel gear (205). A bottom transmission belt (207) is wrapped around the bottom transmission wheel (206) and the middle transmission wheel (208).

7. The construction waste crushing and recycling equipment according to claim 3, characterized in that: The collection mechanism includes a rotating disk (301) rotatably mounted on the outside of the fixed crushing cylinder (104). The rotating disk (301) is supported by magnetic material. A central gear (303) is fixedly mounted on the rotating disk (301). Multiple intermediate gears (302) are rotatably mounted inside the outer cylinder (101). The intermediate gears (302) mesh with the central gear (303) and mesh with the upper gear (113). The upper surface of the rotating disk (301) is a conical surface.

8. The construction waste crushing and recycling equipment according to claim 7, characterized in that: The collection mechanism also includes a guide ring slope (307) fixedly installed inside the outer cylinder (101). The guide ring slope (307) is annular and the upper surface of the guide ring slope (307) is a slope. A scraping box (306) is fixedly installed inside the outer cylinder (101). A blocking block (308) is fixedly installed inside the scraping box (306). An inclined surface is provided on the blocking block (308). The lower surface of the blocking block (308) is in contact with the conical surface of the upper surface of the rotating disk (301). A metal box (304) is provided on the outer cylinder (101). A switch plate (305) is provided on the metal box (304). The metal box (304) is located outside the scraping box (306). An exhaust pipe (310) is provided on the outer cylinder (101). An exhaust fan (309) is fixedly installed on the exhaust pipe (310).

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