A building waste demolition pulverizing apparatus

Abstract

The application discloses a kind of building waste demolishes with crushing equipment, belongs to building waste processing technical field;Including the crushing box with the crushing box of being provided with feed inlet, the crushing box is provided with two parallelly arranged crushing rollers, and crushing roller is located below feed inlet;Two parallelly arranged crushing rollers are provided in the crushing box;First conveyor belt is arranged between the crushing roller and the crushing roller;Second conveyor belt is arranged above first conveyor belt between the crushing box and the crushing box, and the conveying direction of second conveyor belt and first conveyor belt is cross arrangement, support is provided in the second conveyor belt, electromagnet is provided on the support, and a plurality of protrusions are further provided on the support and are attached to the inner wall of the lower side of the second conveyor belt;Recycling box is arranged below the end of the second conveyor belt;Its purpose is to solve the problem of low screening efficiency of reinforcing steel and concrete during the crushing and recycling of reinforced concrete.

Description

Technical Field

[0001] This invention belongs to the field of construction waste treatment technology, specifically relating to a crushing device for construction waste demolition. Background Technology

[0002] Construction waste refers to the debris generated during the demolition of a building's main structure, such as reinforced concrete blocks, masonry blocks, plain concrete blocks, and mortar blocks. This construction waste can be further crushed and screened for use as recycled aggregate or recycled decorative bricks. However, it often contains materials that are difficult to crush and have higher recycling value, such as reinforcing steel bars and embedded metal parts. To maximize economic benefits, construction waste often needs to be sorted and processed accordingly. Conventional construction waste recycling often uses crushers to break down reinforced concrete blocks, followed by manual screening to remove the metal materials. This process is not only labor-intensive but also inefficient. Summary of the Invention

[0003] In view of this, the present invention discloses a crushing device for demolishing construction waste, the purpose of which is to solve the problem of low screening efficiency of steel bars and concrete in the process of crushing and recycling reinforced concrete.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A crushing device for demolishing construction waste includes a crushing box and a grinding box with an inlet. Two parallel crushing rollers are installed inside the crushing box, located below the inlet. A first driving device for driving the two crushing rollers to rotate is installed on the crushing box. Two parallel grinding rollers are installed inside the grinding box, and a second driving device for driving the two grinding rollers to rotate is installed on the grinding box. A first conveyor belt is installed between the crushing rollers and the grinding rollers. A second conveyor belt is installed between the crushing box and the grinding box, located above the first conveyor belt, and the conveying directions of the second conveyor belt intersect with those of the first conveyor belt. A support is installed inside the second conveyor belt, and an electromagnet is installed on the support. Several protrusions that conform to the lower inner wall of the second conveyor belt are also provided on the support. A recycling box is located below the end of the second conveyor belt.

[0005] In this scheme, reinforced concrete is fed into a crushing chamber, where it is initially crushed by crushing rollers to expose the reinforcing bars. The crushed concrete is then conveyed to a grinding chamber via a first conveyor belt. During this conveying process, as the reinforced concrete moves below a second conveyor belt, the reinforcing bars are attracted and adhered to the second conveyor belt by an electromagnet, and then conveyed to a recovery box. During this process, the reinforcing bars are lifted by protrusions, creating a gap between them and the second conveyor belt. After passing the protrusions, the reinforcing bars collide with the second conveyor belt under the attraction of the electromagnet, facilitating separation of the reinforcing bars from the surface concrete. After escaping the electromagnet's magnetic field, the reinforcing bars fall into the recovery box under gravity, completing the separation of the reinforcing bars from the concrete. The remaining concrete is then conveyed to the grinding chamber by the first conveyor belt for further grinding. This scheme, after crushing the reinforced concrete, utilizes a second conveyor belt and electromagnets to screen the reinforcing bars, quickly separating them from the concrete and improving efficiency. It also avoids contact and collision between the reinforcing bars and the grinding rollers, reducing equipment damage.

[0006] Furthermore, a processing box is provided between the second conveyor belt and the crushing box. The processing box is provided with a heating chamber and a cooling chamber in sequence along the conveying direction of the first conveyor belt. The inlet and outlet of the heating chamber are provided with several flexible baffles. Several infrared radiation heaters are provided on the upper and lower walls of the heating chamber. Several downward-facing atomizing nozzles are provided on the top of the cooling chamber. Several support rods are provided on the upper end of the cooling chamber. Arc-shaped pushing blocks are provided at the bottom of the support rods. The pushing blocks are also provided with upward-facing atomizing nozzles.

[0007] In this scheme, when the first conveyor belt transports the pre-crushed reinforced concrete to the heating chamber, the steel bars and concrete are heated by an infrared radiation heater. Then, the heated reinforced concrete is transported to the cooling chamber by the first conveyor belt, where the concrete and steel bars are rapidly cooled by atomizing nozzles. Taking advantage of the difference in thermal expansion coefficients between the steel bars and concrete, directional microcracks are generated only on the bonding surface of the steel bars without burning them red or damaging their metallographic strength. This reduces the bond strength between the steel bars and concrete, which in turn exacerbates the detachment of concrete when the steel bars collide with the second conveyor belt, further separating the concrete and steel bars.

[0008] Furthermore, both sides of the support are provided with baffles parallel to the second conveyor belt, the end faces of the baffles are wavy and the end faces of the baffles are rounded.

[0009] Furthermore, a U-shaped mounting bracket is slidably mounted on the bracket, and a limiting pin is provided between the mounting bracket and the bracket to restrict the sliding of the mounting bracket; the protrusion includes a protrusion body, and a vertically arranged threaded rod is fixed to the top of the protrusion body, and the top of the threaded rod is threadedly connected to the mounting bracket; connecting rods are provided on both sides of the bracket, and the spoiler is horizontally slidably connected to the connecting rods, and a positioning pin is provided on the connecting rod to restrict the sliding of the spoiler.

[0010] Furthermore, several telescopic support rods are provided between adjacent mounting frames, and the support rods are in contact with the inner end face of the second conveyor belt.

[0011] Furthermore, the recycling bin has downwardly inclined impact plates staggered on both sides.

[0012] Furthermore, a filter plate is provided inside the recycling bin, and the filter plate is located below the impact plate.

[0013] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a longitudinal sectional view of an embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a longitudinal sectional view of the second conveyor belt in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the structure of the second conveyor belt in an embodiment of the present invention.

[0015] The following components are labeled in the attached diagram: crushing box 1, crushing box 2, crushing roller 3, crushing roller 4, first conveyor belt 5, second conveyor belt 6, support 7, electromagnet 8, recycling box 9, processing box 10, baffle 11, support rod 12, push block 13, atomizing nozzle 14, baffle 15, mounting bracket 16, protruding body 17, threaded rod 18, connecting rod 19, infrared heating tube 20, impact plate 21, filter plate 22, top support rod 23. Detailed Implementation

[0016] like Figures 1-6 As shown: A crushing device for demolition construction waste includes a crushing box 1 and a grinding box 2 with a feed inlet. The crushing box 1 contains two parallel crushing rollers 3 located below the feed inlet. The crushing box 1 is equipped with a first driving device (in this embodiment, a motor drive is used, which is a conventional technique and therefore not shown in the figure) for driving the two crushing rollers 3 to rotate. The grinding box 2 contains two parallel crushing rollers 4. The grinding box 2 is equipped with a second driving device (in this embodiment, a motor drive is used, which is a conventional technique and therefore not shown in the figure) for driving the two crushing rollers 4 to rotate. A first conveyor belt 5 is provided between the crushing roller 3 and the pulverizing roller 4; a second conveyor belt 6 is provided between the crushing box 1 and the pulverizing box 2, located above the first conveyor belt 5 (in this embodiment, the first conveyor belt 5 and the second conveyor belt 6 are both driven by motors, which is a conventional technical means, so the process is not described), and the conveying directions of the second conveyor belt 6 and the first conveyor belt 5 are arranged intersectingly. A support 7 is provided inside the second conveyor belt 6, and an electromagnet 8 is provided on the support 7. The support 7 is also provided with several protrusions that fit against the lower inner wall of the second conveyor belt 6; a recycling box 9 is provided below the end of the second conveyor belt 6.

[0017] In this scheme, reinforced concrete is fed into the crushing box 1, where it is initially crushed by the crushing roller 3 to expose the reinforcing bars. The crushed concrete is then conveyed to the pulverizing box 2 via the first conveyor belt 5. During this conveying process, when the reinforced concrete moves below the second conveyor belt 6, the reinforcing bars are attracted and adhered to the second conveyor belt 6 by the electromagnet 8, and then conveyed above the recovery box 9. During this process, the reinforcing bars are lifted by the protrusions, creating a gap between the reinforcing bars and the second conveyor belt 6. After passing the protrusions, the reinforcing bars collide with the second conveyor belt 6 under the attraction of the electromagnet 8, facilitating the separation of the reinforcing bars from the surface concrete. After the reinforcing bars are released from the magnetic field of the electromagnet 8, they fall into the recovery box 9 under gravity, completing the separation of the reinforcing bars from the concrete. The remaining concrete is then conveyed to the pulverizing box 2 by the first conveyor belt 5 for further pulverization. This scheme crushes the reinforced concrete and then uses the second conveyor belt 6 and the electromagnet 8 to screen the reinforcing bars, quickly separating them from the concrete and improving efficiency. It also avoids contact and collision between the reinforcing bars and the pulverizing roller 4, reducing equipment damage.

[0018] Furthermore, a processing box 10 is provided between the second conveyor belt 6 and the crushing box 1. The processing box 10 is provided with a heating chamber and a cooling chamber in sequence along the conveying direction of the first conveyor belt 5. The inlet and outlet of the heating chamber are provided with several flexible baffles 11. Several infrared radiation heaters are provided on the upper and lower walls of the heating chamber. Several downward-facing atomizing nozzles 14 are provided on the top of the cooling chamber. Several support rods 12 are provided on the upper end of the cooling chamber. Arc-shaped push blocks 13 are provided at the bottom of the support rods 12. The push blocks 13 are also provided with upward-facing atomizing nozzles 14.

[0019] In this scheme, when the first conveyor belt 5 transports the pre-crushed reinforced concrete to the heating chamber, the steel bars and concrete are heated by an infrared radiation heater; then the heated reinforced concrete is transported to the cooling chamber by the first conveyor belt 5, and the concrete and steel bars are rapidly cooled by atomizing nozzles 14; by utilizing the difference in thermal expansion coefficients between the steel bars and concrete, without burning red or damaging the metallographic strength of the steel bars, directional microcracks are generated only on the bonding surface of the steel bars, which reduces the bonding force between the steel bars and concrete, thereby aggravating the detachment of concrete when the steel bars collide with the second conveyor belt 6, and further screening the concrete and steel bars.

[0020] Furthermore, both sides of the support 7 are provided with baffles 15 parallel to the second conveyor belt 6. The end face of the baffles 15 is wavy and the end face of the baffles 15 is rounded.

[0021] By setting up a spoiler 15, the wave-shaped end face of the spoiler 15 causes the steel bars to be continuously pushed, guided, and derailed as they move forward, shifting left and right, and clustering and misaligning. They no longer move straight along the belt in an orderly manner, but instead squeeze, collide, and rub against each other laterally, increasing the collision effect of the steel bars.

[0022] Furthermore, a U-shaped mounting bracket 16 is slidably disposed on the bracket 7, and a limiting pin is provided between the mounting bracket 16 and the bracket 7 to restrict the sliding of the mounting bracket 16; the protrusion includes a protrusion body 17, and a vertically disposed threaded rod 18 is fixed to the top of the protrusion body 17, and the top of the threaded rod 18 is threadedly connected to the mounting bracket 16; a connecting rod 19 is provided on both sides of the bracket 7, and the spoiler 15 is horizontally slidably connected to the connecting rod 19, and a positioning pin is provided on the connecting rod 19 to restrict the sliding of the spoiler 15.

[0023] In this solution, by rotating the threaded rod 18, the lifting length of the second conveyor belt 6 by the protruding body 17 can be adjusted, thereby adjusting the impact intensity of the steel bars hitting the second conveyor belt 6, avoiding the impact intensity from exceeding the range and damaging the second conveyor belt 6, or the steel bars from being unable to detach from the concrete surface; by using the sliding mounting bracket 16 and the baffle 15, the impact frequency of the steel bars can be adjusted to avoid excessive collision and wear between the steel bars; at the same time, it can also avoid the natural operating frequency of the second conveyor belt 6, eliminating whole-machine resonance and the second conveyor belt 6 shaking and deviating.

[0024] Furthermore, a number of telescopic support rods 23 are provided between adjacent mounting frames 16, and the support rods 23 are in contact with the inner end face of the second conveyor belt 6.

[0025] In this design, a top support rod 23 is installed to provide support for the second conveyor belt 6 when the steel bar impacts it, ensuring the impact strength. The top support rod 23 employs a telescopic structure, ensuring that it remains connected to the mounting frame 16 even when the mounting frame 16 moves.

[0026] Furthermore, the recycling bin 9 has downwardly inclined impact plates 21 staggered on both sides.

[0027] By setting up an impact plate 21, the steel bars fall into the recycling box 9 and collide with the impact plate 21 multiple times, further shaking off the concrete residue attached to the surface of the steel bars.

[0028] Furthermore, a filter plate 22 is provided inside the recycling bin 9, and the filter plate 22 is located below the impact plate 21.

[0029] By setting up filter plate 22, concrete residue falls to the bottom of recycling bin 9, reducing the amount of concrete adhering to the surface of steel reinforcement.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A crushing device for demolishing construction waste, characterized in that: The system includes a crushing box and a pulverizing box, both equipped with feed inlets. The crushing box contains two parallel crushing rollers located below the feed inlet. A first drive device is mounted on the crushing box to drive the two crushing rollers to rotate. The pulverizing box contains two parallel pulverizing rollers. A second drive device is mounted on the pulverizing box to drive the two pulverizing rollers to rotate. A first conveyor belt is positioned between the crushing rollers and the pulverizing rollers. A second conveyor belt is positioned above the first conveyor belt and its conveying direction intersects with that of the first conveyor belt. A support frame is installed inside the second conveyor belt, and an electromagnet is mounted on the support frame. Several protrusions are also provided on the support frame to conform to the lower inner wall of the second conveyor belt. A recycling box is located below the end of the second conveyor belt.

2. The crushing equipment for demolition of construction waste according to claim 1, characterized in that: A processing chamber is provided between the second conveyor belt and the crushing chamber. The processing chamber is provided with a heating chamber and a cooling chamber in sequence along the conveying direction of the first conveyor belt. The inlet and outlet of the heating chamber are provided with several flexible baffles. Several infrared radiation heaters are provided on the upper and lower walls of the heating chamber. Several downward-facing atomizing nozzles are provided on the top of the cooling chamber. Several support rods are provided on the upper end of the cooling chamber. Arc-shaped pushing blocks are provided at the bottom of the support rods. The pushing blocks are also provided with upward-facing atomizing nozzles.

3. The crushing equipment for demolition of construction waste according to claim 2, characterized in that: Both sides of the support are provided with baffles parallel to the second conveyor belt. The end face of the baffle is wavy and has a rounded transition.

4. The crushing equipment for demolition of construction waste according to claim 3, characterized in that: A U-shaped mounting bracket is slidably mounted on the bracket, and a limiting pin is provided between the mounting bracket and the bracket to restrict the sliding of the mounting bracket; the protrusion includes a protrusion body, and a threaded rod is fixed at the top of the protrusion body, and the top of the threaded rod is threadedly connected to the mounting bracket; connecting rods are provided on both sides of the bracket, and the spoiler is slidably connected to the connecting rods horizontally, and a positioning pin is provided on the connecting rod to restrict the sliding of the spoiler.

5. The crushing equipment for demolition of construction waste according to claim 4, characterized in that: Several telescopic support rods are provided between adjacent mounting frames, and the support rods are in contact with the inner end face of the second conveyor belt.

6. The crushing equipment for demolition of construction waste according to claim 5, characterized in that: The recycling bin has downward-sloping impact plates staggered on both sides.

7. A crushing device for demolishing construction waste according to claim 6, characterized in that: The recycling bin is equipped with a filter plate, which is located below the impact plate.

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