Recycled concrete construction waste aggregate screening equipment

Abstract

The utility model relates to the technical field of construction waste treatment, and discloses recycled concrete construction waste aggregate screening equipment which comprises a base, the top end of the base is fixedly connected with a supporting frame, the interior of the supporting frame is fixedly connected with a screening mechanism, and the top end of the base is fixedly connected with an ash removal mechanism. And the screening mechanism comprises a crushing box, the exterior of the crushing box is fixedly connected to the interior of the supporting frame, the rear side of the crushing box is fixedly connected with a crushing motor, and the driving end of the crushing motor is fixedly connected with a crushing roller. According to the aggregate screening device, aggregate is fed into the crushing box again through the auger conveying device and the material returning opening for circular treatment, sufficient crushing of the aggregate is ensured, the material receiving plate is driven by the stepping motor to reciprocate left and right, secondary fine screening is conducted on the aggregate in cooperation with the second screening plate, and two-stage screening enables the screening precision of the aggregate to be improved and the screening efficiency to be improved; meanwhile, raw material waste is reduced through a circular treatment mechanism.

Description

Technical Field

[0001] This utility model relates to the field of construction waste treatment technology, and in particular to a screening device for recycled concrete construction waste aggregates. Background Technology

[0002] Recycled concrete construction waste aggregate refers to the aggregate produced from waste concrete blocks generated during building demolition, road renovation, concrete production, engineering construction, and other situations. After processing such as crushing and screening, it can be divided into recycled coarse aggregate and recycled fine aggregate according to different particle sizes. These aggregates can partially or completely replace natural aggregates in concrete production, non-load-bearing wall materials, and recycled building mortar, etc. It has broad application prospects in construction engineering and is conducive to realizing the resource utilization of construction waste and environmental protection.

[0003] Construction waste aggregate screening equipment refers to equipment used to process construction waste, crush it, and screen out aggregates that meet the requirements. This equipment includes construction waste feeding systems, crushing systems, aggregate separation systems, etc. Through these devices, construction waste can be properly processed in a short time, while simultaneously achieving the recycling and utilization of aggregates.

[0004] Existing construction waste aggregate screening equipment suffers from problems such as insufficient screening accuracy, direct disposal of uncrushed aggregate leading to raw material waste, and frequent screen clogging. To address these issues, a recycled concrete construction waste aggregate screening equipment is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a screening device for recycled concrete construction waste aggregates, which aims to improve the problems of insufficient screening accuracy, raw material waste and frequent screen clogging in some existing construction waste aggregate screening devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A screen for recycled concrete construction waste aggregate includes a base, a support frame fixedly connected to the top of the base, a screening mechanism fixedly connected inside the support frame, and a dust removal mechanism fixedly connected to the top of the base.

[0008] The screening mechanism includes a crushing box, the outside of which is fixedly connected to the inside of the support frame. A crushing motor is fixedly connected to the rear side of the crushing box, and a crushing roller is fixedly connected to the drive end of the crushing motor. A square shell is fixedly connected to the bottom of the crushing box, and a first screen plate is fixedly connected to the inner wall of the square shell. Annular guide rails are fixedly connected to the inner walls of both the front and rear sides of the square shell. Sliding blocks are slidably connected to the outer walls of the annular guide rails. Scrapers are fixedly connected to the tops of the two sliding blocks. A collection box is fixedly connected to the left side of the square shell, and two auger conveyors are fixedly connected to the inside of the collection box. A return port is fixedly connected to the output end of the auger conveyors. A receiving plate is slidably connected to the inside of the support frame, and a drive assembly is fixedly connected to the right side of the receiving plate.

[0009] The above technical solution, consisting of a base, support frame, screening mechanism, and dust removal mechanism, forms the basic framework of the equipment. The base provides stable support to prevent the equipment from shaking, while the support frame provides a stable internal installation environment for the screening mechanism, ensuring the stability of the screening process. The screening mechanism scrapes incompletely crushed aggregates along the annular guide rail into the collection box via a scraper, and then re-feeds them into the crushing box for recycling through an auger conveyor and return port, ensuring that the aggregates are fully crushed and improving the screening accuracy.

[0010] As a further description of the above technical solution:

[0011] The dust removal mechanism includes a dust collection box. The bottom end of the dust collection box is fixedly connected to the top right side of the base. A collection pipe is fixedly connected to both the front and rear sides of the top of the dust collection box. A fixing block is fixedly connected to the left side of the collection pipe. A fan is fixedly connected inside the fixing block. A second fan is fixedly connected to the top of the dust collection box. A connecting pipe is fixedly connected to the top of the second fan. A second collection pipe is fixedly connected to both the front and rear sides of the top of the connecting pipe. An air inlet hood is fixedly connected to the left side of the two second collection pipes.

[0012] The above technical solution involves a dust collection box that collects dust, preventing it from spreading inside the equipment and protecting the internal structure from dust erosion. The collection pipe 1, fan 1, fan 2, connecting pipe, collection pipe 2, and air inlet hood work together to effectively collect dust generated in different parts, maintain equipment cleanliness, reduce dust interference with screening and other operations, and extend the service life of the equipment.

[0013] As a further description of the above technical solution:

[0014] The drive assembly includes a connecting plate, the left side of which is fixedly connected to the right side of the receiving plate, a support frame is fixedly connected to the top of the dust collection box, and a stepper motor is fixedly connected to the top of the support frame.

[0015] The above technical solution connects the receiving plate and the stepper motor, enabling efficient power transmission. The stepper motor provides stable power to drive the receiving plate, allowing the second screen plate inside the receiving plate to accurately screen the aggregate, improving screening accuracy and helping to obtain higher quality recycled concrete construction waste aggregate that meets the requirements.

[0016] As a further description of the above technical solution:

[0017] The receiving plate is fixedly connected to the inside of the receiving plate, the first receiving box is placed on the top right side of the base, and the second receiving box is placed on the top left side of the base.

[0018] Through the above technical solution: the second screen plate inside the receiving plate further screens the aggregates, improving the screening quality; the first and second receiving boxes are placed on both sides of the base, which facilitates the classification and collection of aggregates of different specifications after screening, making it convenient to use the aggregates as needed in the subsequent recycled concrete production process and improving the resource utilization rate of construction waste aggregates.

[0019] As a further description of the above technical solution:

[0020] The top of the support frame is fixedly connected to a feed inlet, the outer walls of the two return inlets are fixedly connected to the left inner wall of the feed inlet, and the outer wall of the scraper is in contact with the top side of the first screen plate.

[0021] The above technical solution ensures that the feed inlet is positioned correctly, allowing construction waste aggregates to enter the crushing box smoothly and guaranteeing the stability of material input. The connection between the return inlet and the feed inlet allows incompletely crushed aggregates to re-enter the crushing box for further crushing, thus improving the completeness of aggregate crushing.

[0022] As a further description of the above technical solution:

[0023] The outer walls of the two fixing blocks are fixedly connected to the inside right side of the square shell, and the outside of the square shell is fixedly connected to the inside of the support frame;

[0024] The above technical solution, namely the fixed connection between the fixed block and the square shell, and the fixed connection between the square shell and the support frame, ensures the tightness and stability of the internal structure of the equipment. During the operation of the equipment, each component can maintain the correct relative position, ensuring the smooth operation of crushing, screening and other operations.

[0025] As a further description of the above technical solution:

[0026] The right side of the connecting plate is fixedly connected to the drive end of the stepper motor, and a drawer is slidably connected to the inner wall of the dust collection box.

[0027] Through the above technical solution: the connection between the connecting plate and the stepper motor ensures the power source for the movement of the receiving plate, enabling the screening work to proceed normally; the sliding connection between the drawer and the dust collection box facilitates the cleaning of dust inside the dust collection box, maintains the dust collection function of the dust collection box, reduces the number of maintenance required due to dust accumulation, lowers maintenance costs, and improves the maintainability of the equipment.

[0028] As a further description of the above technical solution:

[0029] The dust collection box has support rods fixedly connected to both the front and rear sides of its top, and the top of the support rods is fixedly connected to the bottom of the air intake hood.

[0030] The above technical solution involves a support rod connecting the air intake hood and the dust collection box, stabilizing the position of the air intake hood. During equipment operation, a stable air intake hood can more effectively collect dust, ensuring that the dust removal mechanism completely collects the dust generated by the equipment, preventing dust leakage, and further improving the dust removal efficiency and cleanliness of the equipment.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, after the initial screening, the incompletely crushed aggregate is scraped into the collection box by the scraper along the annular guide rail. It is then fed back into the crushing box for recycling through the auger conveyor and return port to ensure that the aggregate is fully crushed. The receiving plate moves back and forth under the drive of the stepper motor, and works with the second screen plate to perform secondary fine screening of the aggregate, which is then sorted into the first and second receiving boxes. The two-stage screening improves the screening accuracy and efficiency of the aggregate, while the recycling mechanism reduces raw material waste.

[0033] 2. In this utility model, through the synergistic action of blower one and blower two, negative pressure airflow is formed in the square shell and receiving plate respectively, and the dust generated during the screening process is sucked into the dust collection box through collection pipe one and collection pipe two. The accumulated dust can be quickly cleaned through the drawer set in the dust collection box, avoiding the screen mesh clogging caused by dust accumulation, reducing the frequency of manual cleaning and reducing maintenance costs. Attached Figure Description

[0034] Figure 1 This is a perspective view of a screen for recycled concrete construction waste aggregates proposed in this utility model.

[0035] Figure 2 This is a schematic diagram of the square shell structure of a recycled concrete construction waste aggregate screening device proposed in this utility model.

[0036] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0037] Figure 4 for Figure 2Enlarged view of point B in the middle.

[0038] Legend:

[0039] 1. Base; 2. Support frame; 3. Screening mechanism; 301. Crushing box; 302. Crushing motor; 303. Square shell; 304. First sieve plate; 305. Circular guide rail; 306. Sliding block; 307. Scraper; 308. Collection box; 309. Screw conveyor; 310. Return port; 311. Receiving plate; 312. First receiving box; 313. Second receiving box; 314. Connecting plate; 315. Support frame; 316. Stepper motor; 4. Dust removal mechanism; 401. Dust collection box; 402. Collection pipe one; 403. Fixing block; 404. Fan one; 405. Fan two; 406. Connecting pipe; 407. Collection pipe two; 408. Air inlet hood; 409. Support rod; 410. Drawer; 5. Feed inlet. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a recycled concrete construction waste aggregate screening device, comprising a base 1, a support frame 2 fixedly connected to the top of the base 1, a screening mechanism 3 fixedly connected inside the support frame 2, and a dust removal mechanism 4 fixedly connected to the top of the base 1. The base 1 provides a stable installation platform for the support frame 2 and the dust removal mechanism 4, and is the basic support structure of the entire device. The dust removal mechanism 4 includes a dust collection box 401, the bottom of which is fixedly connected to the right side of the top of the base 1. The dust collection box 401 is the main container for collecting dust. A feed inlet 5 is fixedly connected to the top of the support frame 2. The support frame 2 securely fixes the screening mechanism 3 inside, providing a stable environment for the screening operation. At the same time, the feed inlet 5 at its top ensures that the construction waste aggregate can smoothly enter the screening mechanism 3, ensuring the integrity and coordination of the entire device structure.

[0042] Specifically, the base 1 serves as the basic support structure for the entire equipment, providing a stable installation platform for the support frame 2 and the dust removal mechanism 4. This ensures the stability of the overall structure of the equipment. A stable structural foundation is conducive to the normal operation of each component of the equipment, reducing component wear and failures caused by shaking or instability, and improving the overall reliability of the equipment.

[0043] The screening mechanism 3 includes a crushing box 301, which is externally and fixedly connected to the inside of the support frame 2. The crushing box 301 is the place where construction waste aggregate is initially crushed. A crushing motor 302 is fixedly connected to the rear side of the crushing box 301, and a crushing roller is fixedly connected to the drive end of the crushing motor 302. When the crushing motor 302 is started, electrical energy is converted into mechanical energy, which drives the crushing roller to rotate, so that the construction waste aggregate entering the crushing box 301 is crushed. A square shell 303 is fixedly connected to the bottom of the crushing box 301, and the square shell 303 is externally and fixedly connected to the inside of the support frame 2. The square shell 303 provides a transition and preliminary screening space for the crushed aggregate. A first screen plate 304 is fixedly connected to the inner wall of the square shell 303. The first screen plate 304 performs the first screening of the construction waste aggregate after it has been crushed by the crushing box 301, blocking aggregate that does not meet the size requirements and allowing only aggregate that meets certain size requirements to pass through. Annular guide rails 305 are fixedly connected to the inner walls of both the front and rear sides of the square shell 303. Sliding blocks 306 are slidably connected to the outer walls of the annular guide rails 305. Scrapers 307 are fixedly connected to the tops of the two sliding blocks 306. The outer wall of the scraper 307 contacts the top side of the first screen plate 304. When the annular guide rails 305 generate power, the sliding blocks 306 can slide stably along them, thereby driving the scraper 307 to move left and right. This is the guiding structure for the normal operation of the scraper 307 and plays a key role in cleaning up incompletely crushed aggregate. A collection box 308 is fixedly connected to the left side of the square shell 303. The inner side of the collection box 308... The unit is fixedly connected to two auger conveyors 309. The collection box 308 collects the incompletely crushed aggregate scraped off from the first screen plate 304, serving as a temporary storage and transfer point. The output end of the auger conveyor 309 is fixedly connected to a return port 310. The outer walls of the two return ports 310 are fixedly connected to the inner wall on the left side of the feed inlet 5. The auger conveyor 309 conveys the incompletely crushed construction waste aggregate in the collection box 308 upwards and puts it back into the crushing box 301 through the return ports 310. The auger conveyor 309 ensures that the incompletely crushed aggregate can be effectively reprocessed, improving the crushing quality of the aggregate.

[0044] Specifically, the crushing box 301 serves as the initial crushing site for construction waste aggregates. In conjunction with the crushing motor 302 and the crushing roller, it can effectively crush the incoming construction waste aggregates. This process is the starting step of the entire aggregate screening process, providing a material basis that meets the requirements for subsequent screening work and helping to improve the overall equipment's screening efficiency for construction waste aggregates.

[0045] A receiving plate 311 is slidably connected inside the support frame 2. A second screen plate is fixedly connected inside the receiving plate 311. The second screen plate performs a finer screening of the construction waste aggregate after it has been screened by the first screen plate 304. A drive assembly is fixedly connected to the right side of the receiving plate 311. The drive assembly includes a connecting plate 314. The left side of the connecting plate 314 is fixedly connected to the right side of the receiving plate 311. A support frame 315 is fixedly connected to the top of the dust collection box 401. A stepper motor 316 is fixedly connected to the top of the support frame 315. The right side of the connecting plate 314 is fixedly connected to the stepper motor 316. At the drive end of 16, the stepper motor 316 generates power, which drives the receiving plate 311 to move back and forth left and right through the connecting plate 314. The first receiving box 312 is placed on the right side of the top of the base 1, and the second receiving box 313 is placed on the left side of the top of the base 1. The construction waste aggregate after being screened by the first screen plate 304 will fall into the receiving plate 311. The receiving plate 311 moves back and forth left and right under the drive of the drive component, and the second screen plate is used for secondary screening to screen the construction waste aggregate into the first receiving box 312 and the second receiving box 313 respectively, thereby improving the screening accuracy.

[0046] Specifically, the receiving plate 311 and its internal second screen plate move back and forth left and right under the drive of the stepper motor 316 through the connecting plate 314, which performs finer screening of the construction waste aggregate after it has been screened by the first screen plate 304, and screens the aggregate into the first receiving box 312 and the second receiving box 313 respectively. This process improves the screening accuracy, resulting in higher quality recycled concrete construction waste aggregate that better meets the requirements of recycled concrete production.

[0047] Reference Figure 1 , Figure 2 and Figure 4The dust collection box 401 has collection pipes 402 fixedly connected to both the front and rear sides of its top. The function of collection pipes 402 is to transfer dust from the square shell 303 to the dust collection box 401. A fixing block 403 is fixedly connected to the left side of collection pipe 402. The outer walls of the two fixing blocks 403 are fixedly connected to the right side of the inside of the square shell 303. A fan 404 is fixedly connected inside the fixing blocks 403, providing an installation position for the fan 404. The fan 404 generates power to agitate the airflow, driving the square shell 303... Dust from the square shell 303 and receiving plate 311 enters the dust collection box 401. A second fan 405 is fixedly connected to the top of the dust collection box 401. A connecting pipe 406 is fixedly connected to the top of the second fan 405. A second collection pipe 407 is fixedly connected to both the front and rear sides of the top of the connecting pipe 406. The connecting pipe 406 serves to connect and transmit the dust collected by the second collection pipe 407 to the dust collection box 401. The dust collection box 401 collects the dust generated during screening from the square shell 303 and receiving plate 311 through the first collection pipe 402 and the second collection pipe 407. An air intake hood 408 is fixedly connected to the left side of the two collection pipes 407. The air intake hood 408 collects dust and concentrates the dust. Support rods 409 are fixedly connected to the front and rear sides of the top of the dust collection box 401. The top of the support rods 409 is fixedly connected to the bottom of the air intake hood 408. The support rods 409 provide support for the air intake hood 408. A drawer 410 is slidably connected to the inner wall of the dust collection box 401. The drawer 410 facilitates the quick cleaning of the dust collected in the dust collection box 401. When the drawer 410 is pulled out, the dust can be easily emptied. Then the drawer 410 is pushed back to ensure that the dust collection box 401 continues to collect dust normally, reducing equipment maintenance costs.

[0048] Specifically, the dust collection box 401 and its related dust removal components, such as fan 1 404, fan 2 405, collection pipe 1 402, and collection pipe 2 407, can effectively collect the dust generated during screening from the square shell 303 and the receiving plate 311. The collected dust can be easily cleaned through the drawer 410, which avoids dust clogging the screen, reduces equipment maintenance costs, and ensures that the equipment can operate stably for a long time.

[0049] Working principle: First, the crushing motor 302 is started to drive the crushing roller to rotate. Then, the construction waste aggregate is conveyed into the crushing box 301 through the feed inlet 5. The crushing roller crushes the construction waste aggregate. After crushing, the construction waste aggregate falls into the square shell 303 and is screened for the first time by the first screen plate 304. At this time, the annular guide rail 305 is started to generate power to drive the sliding block 306 to slide. The sliding block 306, which slides along the annular guide rail 305, drives the scraper 307 to move left and right. The movement of the scraper 307 scrapes the incompletely crushed construction waste aggregate remaining on the first screen plate 304 into the collection box. Inside the collection box 308, the auger conveyor 309 inside the collection box 308 is used to transport the incompletely crushed construction waste aggregate upwards and put it back into the crushing box 301 through the return port 310 for further crushing. The construction waste aggregate passing through the first screen plate 304 will fall into the receiving plate 311. At this time, the stepper motor 316 is turned on to generate power and, in conjunction with the connection plate 314, drives the receiving plate 311 to move left and right back and forth. Using the screening of the second screen plate set in the receiving plate 311, the construction waste aggregate is screened into the first receiving box 312 and the second receiving box 313 respectively, which improves the screening accuracy of recycled concrete construction waste aggregate.

[0050] Because the aggregate has a high powder content, the screen is prone to clogging during the screening process. By turning on the blower 404, the airflow is agitated and the dust inside the square shell 303 is drawn into the fixed block 403. The dust is then collected in the dust collection box 401 through the collection pipe 402. By turning on the blower 405, the dust generated during screening in the receiving plate 311 is drawn into the air inlet hood 408. Then, with the help of the two collection pipes 407, the dust is transported to the connecting pipe 406. Finally, the dust is collected in the dust collection box 401. The drawer 410 can be used to quickly clean the collected dust, thereby avoiding the problem of easy screen clogging and reducing maintenance costs.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screening device for recycled concrete construction waste aggregate, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a support frame (2), the inside of the support frame (2) is fixedly connected to a screening mechanism (3), and the top of the base (1) is fixedly connected to a dust removal mechanism (4). The screening mechanism (3) includes a crushing box (301), the outside of which is fixedly connected to the inside of the support frame (2). A crushing motor (302) is fixedly connected to the rear side of the crushing box (301), and a crushing roller is fixedly connected to the drive end of the crushing motor (302). A square shell (303) is fixedly connected to the bottom of the crushing box (301), and a first sieve plate (304) is fixedly connected to the inner wall of the square shell (303). Annular guide rails (305) are fixedly connected to the inner walls of both the front and rear sides of the square shell (303). A sliding block (306) is slidably connected to the outer wall of the annular guide rail (305). A scraper (307) is fixedly connected to the top of the two sliding blocks (306). A collection box (308) is fixedly connected to the left side of the square shell (303). Two auger conveyors (309) are fixedly connected inside the collection box (308). A return port (310) is fixedly connected to the output end of the auger conveyor (309). A receiving plate (311) is slidably connected inside the support frame (2). A drive assembly is fixedly connected to the right side of the receiving plate (311).

2. The recycled concrete construction waste aggregate screening equipment according to claim 1, characterized in that: The dust removal mechanism (4) includes a dust collection box (401). The bottom end of the dust collection box (401) is fixedly connected to the top right side of the base (1). The front and rear sides of the top of the dust collection box (401) are fixedly connected to a first collection pipe (402). The left side of the first collection pipe (402) is fixedly connected to a fixing block (403). The inside of the fixing block (403) is fixedly connected to a first fan (404). The top of the dust collection box (401) is fixedly connected to a second fan (405). The top of the second fan (405) is fixedly connected to a connecting pipe (406). The front and rear sides of the top of the connecting pipe (406) are fixedly connected to a second collection pipe (407). The left side of the two second collection pipes (407) is fixedly connected to an air inlet hood (408).

3. The recycled concrete construction waste aggregate screening equipment according to claim 2, characterized in that: The drive assembly includes a connecting plate (314), the left side of which is fixedly connected to the right side of the receiving plate (311), and a support frame (315) is fixedly connected to the top of the dust collection box (401), and a stepper motor (316) is fixedly connected to the top of the support frame (315).

4. The recycled concrete construction waste aggregate screening equipment according to claim 1, characterized in that: The receiving plate (311) is fixedly connected to the inside of the receiving plate (311), the first receiving box (312) is placed on the right side of the top of the base (1), and the second receiving box (313) is placed on the left side of the top of the base (1).

5. The recycled concrete construction waste aggregate screening equipment according to claim 1, characterized in that: The top of the support frame (2) is fixedly connected to the feed inlet (5), the outer walls of the two return ports (310) are fixedly connected to the left inner wall of the feed inlet (5), and the outer wall of the scraper (307) is in contact with the top side of the first screen plate (304).

6. The recycled concrete construction waste aggregate screening equipment according to claim 2, characterized in that: The outer walls of the two fixing blocks (403) are fixedly connected to the inside right side of the square shell (303), and the outside of the square shell (303) is fixedly connected to the inside of the support frame (2).

7. The recycled concrete construction waste aggregate screening equipment according to claim 3, characterized in that: The right side of the connecting plate (314) is fixedly connected to the drive end of the stepper motor (316), and the inner wall of the dust collection box (401) is slidably connected to a drawer (410).

8. The recycled concrete construction waste aggregate screening equipment according to claim 2, characterized in that: The dust collection box (401) has support rods (409) fixedly connected to both the front and rear sides of its top end, and the top end of the support rods (409) is fixedly connected to the bottom end of the air intake hood (408).

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