Pre-screening equipment for construction waste before crushing

Abstract

The utility model discloses pre-screening equipment for construction waste before crushing, which relates to the technical field of construction waste treatment and comprises a first conveying device, a second conveying device, a flotation tank component and a magnetic separation device. The first conveying device is used for conveying construction waste; the second conveying device is in butt joint with the first conveying device so as to receive the construction waste conveyed by the first conveying device. The flotation tank assembly is provided with a water containing cavity and arranged between the first conveying device and the second conveying device, and the butt joint point of the first conveying device and the second conveying device is located in the water containing cavity. The magnetic separation device is erected on the second conveying device, and a conveying path of the second conveying device penetrates through a magnetic field of the magnetic separation device. According to the pre-screening equipment before crushing of the construction wastes, plastic, wood and metal wastes in the construction wastes are screened and removed, and the crushing efficiency and the quality of crushed coarse and fine aggregates are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction waste treatment, in particular to a pre-screening device for construction waste before crushing. Background Art

[0002] Construction waste refers to the slag, abandoned soil, abandoned materials, silt and other wastes generated during the construction, laying, demolition and repair of various buildings, structures, pipe networks, etc. by construction units or individuals. Other wastes include plastic, wood and metal waste, and the metal waste is mainly steel bars.

[0003] The discarded materials in construction waste are mainly abandoned building concrete and abandoned bricks, which account for the majority of construction waste. Abandoned building concrete and abandoned bricks can be recycled and crushed to produce coarse and fine aggregates. However, when crushing construction waste, plastic, wood and metal waste will be mixed in, affecting the quality of coarse and fine aggregates. Even metal waste can damage the crushing equipment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a pre-screening device for construction waste before crushing, which can screen and remove plastic, wood and metal waste in construction waste, thereby improving the crushing efficiency and the quality of coarse and fine aggregates after crushing.

[0005] The pre-screening device for construction waste before crushing according to the embodiment of the utility model comprises: a first conveying device, the first conveying device is used to transport construction waste;

[0006] a second conveying device, the second conveying device docking with the first conveying device to receive the construction waste transported by the first conveying device;

[0007] A flotation cell assembly, wherein the flotation cell assembly has a water-containing chamber, the flotation cell assembly is disposed between the first conveying device and the second conveying device, and a docking point between the first conveying device and the second conveying device is located in the water-containing chamber;

[0008] A magnetic separation device is mounted on the second conveying device, and a conveying path of the second conveying device passes through the magnetic field of the magnetic separation device.

[0009] The pre-screening equipment for crushing construction waste according to the embodiment of the utility model has at least the following beneficial effects: the construction waste is put into the first conveying device, and the first conveying device transfers the construction waste to the second conveying device; wherein, the water holding chamber of the flotation tank assembly is used to hold water, so that the plastic and wood with low density in the construction waste float on the water surface, and the remaining construction waste is transferred to the second conveying device and leaves the flotation tank assembly; further, the magnetic separation device mounted on the second conveying device uses the magnetic field to remove the metals that can be magnetically adsorbed in the construction waste.

[0010] According to some embodiments of the present invention, the first conveying device includes a first conveying belt, the second conveying device includes a second conveying belt, and the output end of the first conveying belt is mounted above the input end of the second conveying belt.

[0011] According to some embodiments of the present invention, both the first conveyor belt and the second conveyor belt have drive rollers, and the drive rollers form a V-shaped roller track.

[0012] According to some embodiments of the utility model, the flotation tank assembly includes a tank body, an overflow port is opened on the upper part of the side wall of the tank body, a collecting tank is provided on the outer side of the tank body, the collecting tank is in contact with the side wall of the tank body and is located below the overflow port, a filter assembly is provided in the collecting tank, a circulating pump assembly is provided between the collecting tank and the tank body, the water inlet of the circulating pump assembly is connected to the outlet of the filter assembly, and the water outlet of the circulating pump assembly is connected to the tank body.

[0013] According to some embodiments of the utility model, the filter assembly includes a filter mesh plate, which is laid on the collecting tank. The filter mesh plate separates the collecting tank into a first chamber and a second chamber distributed vertically. The first chamber is located above the second chamber, and the water inlet of the circulating pump assembly is connected to the second chamber.

[0014] According to some embodiments of the utility model, an oblique guide structure is provided at the bottom of the trough body, and a first discharge outlet is also opened at the bottom of the trough body, and the first discharge outlet is arranged at the lowest point of the oblique guide structure.

[0015] According to some embodiments of the utility model, a push plate is provided at the bottom of the trough body, and the push plate is connected to a driving assembly, and the driving assembly is used to drive the push plate to move along the bottom surface of the trough body. The trough body is provided with a second discharge outlet, and the second discharge outlet is located at the moving path of the push plate.

[0016] According to some embodiments of the present invention, the drive assembly is a hydraulic drive cylinder.

[0017] According to some embodiments of the utility model, the magnetic separation device includes a third conveying component and a magnetic pole component, the third conveying component is mounted on the second conveying device, the transmission direction of the third conveying component intersects with the transmission direction of the second conveying device, the third conveying component includes a third conveyor belt, the magnetic pole component is arranged on the third conveying component and the magnetic pole component is located on the side of the third conveyor belt away from the second conveying device.

[0018] According to some embodiments of the utility model, a plurality of baffles are provided on the surface of the third conveyor belt facing the second conveying device, the length direction of the baffles is perpendicular to the moving direction of the third conveyor belt, and the plurality of baffles are spaced apart along the moving direction of the third conveyor belt.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a pre-screening device for construction waste before crushing according to an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the flotation cell assembly in the embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first tank body in the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the second tank body in the embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the magnetic separation device in the embodiment of the utility model.

[0026] Figure Number:

[0027] The first conveying device 100, the second conveying device 200, the flotation tank assembly 300, the tank body 310, the overflow port 311, the inclined guide structure 312, the collecting tank 320, the filter assembly 330, the push plate 340, the magnetic separation device 400, the third conveying assembly 410, the baffle 411, and the magnetic pole assembly 420. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Construction waste mainly includes abandoned building concrete and abandoned bricks and stones, and is also accompanied by plastic packaging of various construction products, unused or damaged plastic assemblies, and wood used as frames, doors, cabinets, and steel bars in concrete. The abandoned building concrete and abandoned bricks and stones in construction waste can be recycled and crushed to produce coarse and fine aggregates, while the plastic, wood, and metal waste carried by construction waste will affect the crushing operation of construction waste and need to be processed before crushing.

[0033] Reference Figure 1As shown, wherein the supporting structure is not shown, a pre-screening device for construction waste before crushing of an embodiment of the utility model comprises a first conveying device 100, a second conveying device 200, a flotation tank assembly 300 and a magnetic separation device 400. The first conveying device 100 is used to transport construction waste; the second conveying device 200 docks with the first conveying device 100 to receive the construction waste transported by the first conveying device 100; the flotation tank assembly 300 has a water holding chamber, the flotation tank assembly 300 is arranged between the first conveying device 100 and the second conveying device 200, and the docking point of the first conveying device 100 and the second conveying device 200 is located in the water holding chamber; the magnetic separation device 400 is mounted on the second conveying device 200, and the conveying path of the second conveying device 200 passes through the magnetic field of the magnetic separation device 400. The pre-screening device for construction waste before crushing of the utility model can screen and remove plastic, wood and metal waste in construction waste, and improve the crushing efficiency and the quality of coarse and fine aggregates after crushing.

[0034] First, fill the water-containing chamber of the flotation cell assembly 300 with water, then place the construction waste on the first conveying device 100, and the first conveying device 100 conveys the construction waste to the second conveying device 200. After the construction waste moves to the flotation cell assembly 300, the plastic and wood waste in the construction waste floats on the water surface due to their low density, and the remaining construction waste is received by the second conveying device 200 and continues to be conveyed to the outside of the flotation cell assembly 300.

[0035] On the second conveying device 200, the magnetic separation device 400 removes metal waste from the construction waste by generating a magnetic field. Most of the metal in the construction waste is steel bars and iron materials, which can be adsorbed by the magnetic field. The magnetic field of the magnetic separation device 400 can be provided by a permanent magnet or an electromagnet. It is preferred to use an electromagnet to facilitate changing the magnetic field strength.

[0036] In addition, after the construction waste is immersed in water in the flotation tank assembly 300, the generation of floating dust during the crushing operation can also be suppressed.

[0037] It is understandable that in some specific structures, the first conveying device 100 includes a first conveyor belt, the second conveying device 200 includes a second conveyor belt, and the output end of the first conveyor belt is mounted above the input end of the second conveyor belt. Preferably, both the first conveyor belt and the second conveyor belt have drive rollers, and the drive rollers form a V-shaped roller track.

[0038] When construction waste is placed on the first conveyor belt or the second conveyor belt, it sags due to gravity. The V-shaped roller can receive more construction waste within a unit length of the first conveyor belt or the second conveyor belt, thereby improving the conveying efficiency.

[0039] Reference Figure 2As shown, it can be understood that the flotation tank assembly 300 includes a tank body 310, an overflow port 311 is opened on the upper part of the side wall of the tank body 310, a collecting tank 320 is provided on the outer side of the tank body 310, the collecting tank 320 is in contact with the side wall of the tank body 310 and is located below the overflow port 311, a filter assembly 330 is provided in the collecting tank 320, a circulating pump assembly is provided between the collecting tank 320 and the tank body 310, the water inlet of the circulating pump assembly is connected to the outlet of the filter assembly 330, and the water outlet of the circulating pump assembly is connected to the tank body 310.

[0040] The circulation pump assembly can make the water in the tank body 310 flow, and bring the garbage floating on the water surface out of the tank body 310 into the collection tank 320 through the overflow port 311. The collection tank 320 is provided with a filter assembly 330 to block the garbage on the filter assembly 330. The water flow passing through the filter assembly 330 continues to be transported to the tank body 310 by the circulation pump assembly.

[0041] Reference Figure 2 As shown, it can be understood that in some embodiments, the filter assembly 330 includes a filter mesh plate, which is laid on the collection tank 320. The filter mesh plate separates the collection tank 320 into a first chamber and a second chamber distributed vertically. The first chamber is located above the second chamber, and the water inlet of the circulation pump assembly is connected to the second chamber.

[0042] Reference Figure 3 As shown, it can be understood that an oblique guide structure 312 is provided at the bottom of the trough body 310 , and a first outlet is also opened at the bottom of the trough body 310 , and the first outlet is arranged at the lowest point of the oblique guide structure 312 .

[0043] In the process of transferring construction waste from the first conveying device 100 to the second conveying device 200, it is inevitable that some construction waste will fall outside, and the debris in the construction waste will also spread with the flow of water. The inclined guide structure 312 provided in the tank body 310 is used to guide the construction waste and debris that fall outside, and collect them at the lowest point of the inclined guide structure 312, so as to facilitate unified cleaning from the first outlet. It should be understood that the first outlet will be covered with a structure such as a partition to prevent water from overflowing from the first outlet when the flotation tank assembly 300 is working normally.

[0044] Reference Figure 4 As shown, it can be understood that a push plate 340 is provided at the bottom of the trough body 310, and the push plate 340 is connected to a driving assembly, which is used to drive the push plate 340 to move along the bottom surface of the trough body 310, and the trough body 310 is provided with a second row of outlets, which are located at the moving path of the push plate 340.

[0045] Similarly, the push plate 340 is driven by the driving component to move on the bottom surface of the tank body 310, and the sediments such as construction waste and slag that fall on the outside can also be collected and pushed to the second discharge port for cleaning. Preferably, the driving component is a hydraulic driving cylinder.

[0046] Reference Figure 5 As shown, it can be understood that the magnetic separation device 400 includes a third conveying component 410 and a magnetic pole component 420, the third conveying component 410 is mounted on the second conveying device 200, the transmission direction of the third conveying component 410 intersects with the transmission direction of the second conveying device 200, the third conveying component 410 includes a third conveyor belt, the magnetic pole component 420 is arranged on the third conveying component 410 and the magnetic pole component 420 is located on the side of the third conveyor belt away from the second conveying device 200.

[0047] When the metal objects that can be attracted by magnetism move to the third conveying assembly 410 along with the construction waste, the metal objects are attracted by the magnetic field generated by the magnetic pole assembly 420 and attached to the third conveying belt. The third conveying belt drives the metal objects to continue to move through friction until the metal objects move to the side of the magnetic pole assembly 420. The magnetic field here is weak, and the attraction force of the magnetic pole assembly 420 on the metal objects is less than the gravity of the metal objects themselves, so the metal objects will fall. Since the transmission direction of the third conveying assembly 410 intersects with the transmission direction of the second conveying device 200, the metal objects will not return to the second conveying device 200 when they fall, so that the separation of metal objects in the construction waste is achieved.

[0048] It can be understood that a plurality of baffles 411 are provided on the surface of the third conveyor belt facing the second conveyor device 200, the length direction of the baffles 411 is perpendicular to the moving direction of the third conveyor belt, and the plurality of baffles 411 are spaced apart along the moving direction of the third conveyor belt.

[0049] If the magnetic field of the magnetic pole assembly 420 is too strong, the friction force of the third conveyor belt cannot move the metal object, and the baffle 411 needs to be used to push the metal object adsorbed on the third conveyor belt away from the magnetic pole assembly 420 .

[0050] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pre-screening device for construction waste before crushing, It is characterized in that include: A first conveying device (100), the first conveying device (100) being used for transporting construction waste; a second conveying device (200), the second conveying device (200) being docked with the first conveying device (100) to receive the construction waste transported by the first conveying device (100); A flotation cell assembly (300), the flotation cell assembly (300) having a water holding chamber, the flotation cell assembly (300) being arranged between the first conveying device (100) and the second conveying device (200), and a docking point between the first conveying device (100) and the second conveying device (200) being located in the water holding chamber; A magnetic separation device (400) is mounted on the second conveying device (200), and the conveying path of the second conveying device (200) passes through the magnetic field of the magnetic separation device (400).

2. The pre-screening device for construction waste before crushing according to claim 1, Features: The first conveying device (100) comprises a first conveying belt, the second conveying device (200) comprises a second conveying belt, and the output end of the first conveying belt is mounted above the input end of the second conveying belt.

3. The pre-screening equipment for construction waste before crushing according to claim 2, Features: The first conveyor belt and the second conveyor belt both have drive rollers, and the drive rollers form a V-shaped roller track.

4. The construction waste pre-crushing screening device according to claim 1, Features: The flotation tank assembly (300) comprises a tank body (310), an overflow port (311) is provided on the upper part of the side wall of the tank body (310), a collecting tank (320) is provided on the outer side of the tank body (310), the collecting tank (320) is in contact with the side wall of the tank body (310) and is located below the overflow port (311), a filtering assembly (330) is provided in the collecting tank (320), a circulating pump assembly is provided between the collecting tank (320) and the tank body (310), a water inlet of the circulating pump assembly is communicated with an outlet of the filtering assembly (330), and a water outlet of the circulating pump assembly is communicated with the tank body (310).

5. The pre-screening device for construction waste before crushing according to claim 4, Features: The filter assembly (330) comprises a filter mesh plate, which is laid on the collection tank (320). The filter mesh plate separates the collection tank (320) into a first chamber and a second chamber which are vertically distributed. The first chamber is located above the second chamber, and the water inlet of the circulation pump assembly is connected to the second chamber.

6. The construction waste pre-crushing screening device according to claim 4, Features: An oblique guide structure (312) is provided at the bottom of the trough body (310), and a first discharge outlet is also provided at the bottom of the trough body (310), wherein the first discharge outlet is arranged at the lowest point of the oblique guide structure (312).

7. The pre-screening device for construction waste before crushing according to claim 4, Features: A push plate (340) is provided at the bottom of the trough body (310), and the push plate (340) is connected to a driving component, and the driving component is used to drive the push plate (340) to move along the bottom surface of the trough body (310). The trough body (310) is provided with a second discharge outlet, and the second discharge outlet is located at the moving path of the push plate (340).

8. The construction waste pre-crushing screening device according to claim 7, Features: The driving assembly is a hydraulic driving cylinder.

9. The construction waste pre-crushing screening device according to claim 1, Features: The magnetic separation device (400) includes a third conveying component (410) and a magnetic pole component (420), wherein the third conveying component (410) is mounted on the second conveying device (200), and the transmission direction of the third conveying component (410) intersects with the transmission direction of the second conveying device (200), and the third conveying component (410) includes a third conveyor belt, and the magnetic pole component (420) is arranged on the third conveying component (410) and the magnetic pole component (420) is located on the side of the third conveyor belt away from the second conveying device (200).

10. The pre-screening device for construction waste before crushing according to claim 9, Features: A plurality of baffles (411) are provided on the surface of the third conveyor belt facing the second conveying device (200), the length direction of the baffles (411) is perpendicular to the moving direction of the third conveyor belt, and the plurality of baffles (411) are distributed at intervals along the moving direction of the third conveyor belt.

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