Screening device for concrete coarse aggregate

Abstract

The utility model relates to the technical field of screening devices, and discloses a concrete coarse aggregate screening device which comprises a screening machine, a first screening plate is fixedly connected inside the screening machine in a sleeved mode, a PLC is fixedly installed on one side of the screening machine, the concrete coarse aggregate screening device further comprises a dust collection assembly, the dust collection assembly is arranged on one side of the screening machine and used for collecting dust, and the dust collection assembly is used for collecting the dust. The dust collection assembly comprises a filtering bin, the filtering bin is arranged on one side of the screening machine, an air inlet hole in the top face of the filtering bin is fixedly connected with a first connecting pipe in a sleeved mode, and the screening machine, the dust collection bin, dust collection holes and a second connecting pipe are used in cooperation, so that the dust collection effect on a feeding port and a discharging port of the screening machine can be effectively achieved; dust generated in the machining process is reduced, the surrounding air quality is improved, double filtration is conducted through two dust filter plates, pulse dust removal is conducted through a dust removal spray head, dust is collected through a dust storage drawer, the dust storage drawer can be pulled out for cleaning, and the device is practical.

Description

Technical Field

[0001] This utility model relates to the field of screening device technology, and in particular to a screening device for coarse aggregate in concrete. Background Technology

[0002] Recycled concrete refers to new concrete made by crushing, cleaning, and grading waste concrete blocks, mixing them with aggregates in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc. Recycled concrete can be divided into coarse aggregates and fine aggregates according to the aggregate combination. When using recycled concrete aggregates, screening devices are required for sieving.

[0003] An existing aggregate screening device for recycled concrete processing (publication number: CN220658325U) has at least the following drawbacks:

[0004] In the aforementioned patent, the device integrates crushing and screening functions, enabling simultaneous crushing and grading to improve preliminary processing efficiency. It also generates regular vibrations through gear transmission and eccentric wheels to assist in coarse and fine separation. However, dust is generated during feeding and discharging, which then drifts into the air, affecting the surrounding air quality and the health of users, thus presenting certain limitations. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a screening device for coarse aggregates in concrete.

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

[0007] A screening device for coarse aggregate in concrete includes a screening machine, with a first screen plate fixedly sleeved inside the screening machine. A PLC controller is fixedly installed on one side of the screening machine. The device also includes a dust collection assembly disposed on one side of the screening machine for dust collection. The dust collection assembly includes a filter chamber disposed on one side of the screening machine. A first connecting pipe is fixedly sleeved through an air inlet on the top surface of the filter chamber. A dust collection chamber is fixedly installed on the top surface of the feed hopper of the screening machine. Several suction ports are provided on the four sides inside the dust collection chamber. The dust collection chamber has an air outlet that is fixedly connected to the first connecting pipe. A dust cover is movably fitted onto the outside of the screening machine. A first fixed chamber is fixedly fitted inside the dust cover. Several air intake holes are opened on the four sides of the inside of the first fixed chamber. A first circular through hole is opened on one side of the dust cover. A second connecting pipe is fixedly fitted onto the inner circular wall of the first circular through hole. The inner circular wall of the air inlet on one side of the filter chamber is fixedly fitted onto the second connecting pipe. The dust filter assembly is used to filter, clean, and collect dust.

[0008] As a further embodiment of this utility model, the dust filter assembly includes: two fixing holes, both of which are opened on one side of the filter chamber; a dust filter plate is movably fitted inside the filter chamber, with the dust filter plate having a decreasing diameter from right to left; a support hole is opened on one side of the filter chamber, and a dust collection drawer is movably fitted inside the support hole; and several second circular through holes are opened on one side of the filter chamber, with dust removal nozzles fixedly fitted onto the inner circular wall of the second circular through holes.

[0009] As a further embodiment of this utility model, a plurality of threaded columns are fixedly installed on one side of the filter chamber, and nuts are threadedly connected to the outer circular wall of the threaded columns. Two limiting holes are opened on one side of the dust filter plate, and the limiting holes are threadedly connected to the threaded columns.

[0010] As a further embodiment of this utility model, the interior of the ash storage drawer is fixedly fitted with a partition and a baffle.

[0011] As a further embodiment of this utility model, an air extraction pipe is fixedly sleeved on the inner circular wall of the air outlet of the filter chamber, and an air extraction machine is fixedly sleeved on the outer circular wall of the air extraction pipe. The air extraction machine is electrically connected to the PLC controller.

[0012] As a further embodiment of this utility model, a second screen plate is fixedly sleeved inside the screening machine, and second fixed chambers are fixedly installed on both sides of the screening machine. Support frames are fixedly installed on the bottom surfaces of the first screen plate and the second screen plate, and a vibration motor is fixedly installed on the bottom surface of the support frame. The vibration motor is electrically connected to the PLC controller.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By using the screening machine, first screen plate, filter chamber, first connecting pipe, dust collection chamber, dust collection hole and second connecting pipe in coordination, the dust collection effect of the screening machine's feeding port and discharge port can be effectively achieved, reducing the dust generated during processing and improving the surrounding air quality. The dual filtration is achieved through two dust filter plates, and the dust removal is carried out by the dust removal nozzle. The dust is collected through the dust collection drawer, which can be pulled out for cleaning, making it quite practical.

[0015] 2. By unscrewing the nut from the outside of the threaded post, the limiting position on the dust filter plate can be released, allowing the dust filter plate to be pulled out from the fixing hole for replacement or cleaning, ensuring the filtration effect. The filtration accuracy increases with the setting of the first and second screen plates. After the first screen plate performs preliminary screening of the material, it is discharged into the second fixed chamber on the left through the left discharge port. After the second screen plate performs secondary screening, the material is discharged into the second fixed chamber on the right through the right side of the screening machine. Finally, the material is discharged through the discharge port at the bottom of the screening machine. The support frame and the vibration motor work together to vibrate the bottom of the first and second screen plates. The vibration intensity is controlled by the PLC controller, which is simpler than the structure of motor, belt and eccentric wheel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a screening device for coarse aggregates in concrete proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the screening machine structure of a screening device for coarse aggregate in concrete proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the filter chamber structure of a screening device for coarse aggregates in concrete proposed in this utility model.

[0019] Figure 4 for Figure 3 A partial structural diagram of A in the middle;

[0020] Figure 5 for Figure 2 A schematic diagram of the partial structure of B in the diagram;

[0021] Figure 6 This is a schematic diagram of the dust filter plate structure of a screening device for coarse aggregates in concrete proposed in this utility model.

[0022] Figure 7 This is a schematic diagram of the dust removal nozzle structure of a screening device for coarse aggregates in concrete proposed in this utility model.

[0023] In the diagram: 1. Screening machine; 2. First screen plate; 3. Filter chamber; 4. First connecting pipe; 5. Dust collection chamber; 6. Dust collection hole; 7. Second connecting pipe; 8. Dust cover; 9. First fixed chamber; 10. Air suction hole; 11. Second fixed chamber; 12. Fixing hole; 13. Dust filter plate; 14. Dust collection drawer; 15. Partition plate; 16. Baffle plate; 17. Nut; 18. Limiting hole; 19. Threaded column; 20. Air extraction pipe; 21. Air extraction fan; 22. Second screen plate; 23. Support frame; 24. Vibration motor; 25. Dust removal nozzle; 26. Support hole. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Reference Figures 1-7 A screening device for coarse aggregate in concrete includes a screening machine 1, with a first screen plate 2 fixedly sleeved inside the screening machine 1. A PLC controller is fixedly installed on one side of the screening machine 1. The device also includes a dust collection assembly, which is located on one side of the screening machine 1 and is used for dust collection. The dust collection assembly includes a filter chamber 3, which is located on one side of the screening machine 1. A first connecting pipe 4 is fixedly sleeved through an air inlet on the top surface of the filter chamber 3. A dust collection chamber 5 is fixedly installed on the top surface of the feed hopper of the screening machine 1. The dust collection chamber 5 has a hollow internal structure, with openings on its four sides. There are several suction holes 6. The air outlet of the suction chamber 5 is fixedly connected to the first connecting pipe 4. The external of the screening machine 1 is movably fitted with a dust cover 8. The inside of the dust cover 8 is fixedly fitted with a first fixed chamber 9. Several suction holes 10 are opened on the four sides of the inside of the first fixed chamber 9. A first circular through hole is opened on one side of the dust cover 8. A second connecting pipe 7 is fixedly fitted on the inner circular wall of the first circular through hole. The inner circular wall of the air inlet on one side of the filter chamber 3 is fixedly fitted with the second connecting pipe 7. The dust filter assembly is used to filter, clean and collect dust.

[0028] In use, when the user needs to screen the coarse aggregate of concrete, the screening machine 1 is started and the air extractor 21 is activated to draw air into the filter chamber 3 through the air extraction pipe 20. The dust collection chamber 5 and the first fixed chamber 9 are kept under negative pressure through the first connecting pipe 4 and the second connecting pipe 7, so that air enters the first fixed chamber 9 and the dust collection chamber 5 through the air intake 10 and the dust intake 6. Several air intake 10 and several dust intake 6 surround the top hopper and the bottom discharge port of the screening machine 1, so that the dust generated during feeding enters the dust collection chamber 5 and the first connecting pipe 4 with the flowing air, and enters the filter chamber 3. Similarly, the dust cover 8 is set up to cover the bottom of the screening machine 1, and the dust generated enters the first fixed chamber 9, the second connecting pipe 7 and the filter chamber 3 with the flowing air. By starting the first fixed chamber 9 to contract, the dust cover 8 is raised and lowered, so that the dust cover 8 can block the dust as much as possible. In use, the user can set three parallel conveyor belts at the bottom of the screening machine 1 to transport materials.

[0029] In this embodiment, the dust filtration assembly includes: two fixing holes 12, both of which are opened on one side of the filter chamber 3. A dust filter plate 13 is movably fitted inside the filter chamber 3. The dust filter plate 13 has a decreasing diameter from right to left. A support hole 26 is opened on one side of the filter chamber 3. A dust collection drawer 14 is movably fitted inside the support hole 26. Several second circular through holes are opened on one side of the filter chamber 3. A dust removal nozzle 25 is fixedly fitted on the inner circular wall of the second circular through hole.

[0030] In use, when dust enters the filter chamber 3, it is filtered by the dust filter plates 13. The dust filter plates 13 on the left and right sides have different filtration accuracies, performing coarse and fine filtration respectively. In use, the dust removal nozzle 25 is connected to the air pipe and connected to the pulse solenoid valve. The pulse solenoid valve is connected to the air pump outlet pipe. The solenoid valve is activated once every three minutes by the pulse controller, allowing high-pressure air to enter the dust removal nozzle 25. The high-pressure air is sprayed out by the horizontally inclined dust removal nozzle 25 and blown onto the dust filter plates 13 to perform pulse dust removal on their windward side. The dust falls into the dust collection drawer 14 for collection. The dust collection drawer 14 can be fixed by installing a locking mechanism on both sides of the filter chamber 3 and the dust collection drawer 14. The dust collection drawer 14 can be pulled out from the support hole 26 by moving the locking mechanism to clean the dust.

[0031] In this embodiment, several threaded posts 19 are fixedly installed on one side of the filter chamber 3. Nuts 17 are threadedly connected to the outer circular wall of the threaded posts 19. Two limiting holes 18 are opened on one side of the dust filter plate 13. The limiting holes 18 are threadedly connected to the threaded posts 19. A partition plate 15 and a baffle plate 16 are fixedly sleeved inside the dust storage drawer 14. An air extraction pipe 20 is fixedly sleeved on the inner circular wall of the air outlet of the filter chamber 3. An air extraction fan 21 is fixedly sleeved on the outer circular wall of the air extraction pipe 20. The air extraction fan 21 is electrically connected to the PLC controller. A second screen plate 22 is fixedly sleeved inside the screening machine 1. Second fixed chambers 11 are fixedly installed on both sides of the screening machine 1. Support frames 23 are fixedly installed on the bottom surfaces of the first screen plate 2 and the second screen plate 22. A vibration motor 24 is fixedly installed on the bottom surface of the support frame 23. The vibration motor 24 is electrically connected to the PLC controller.

[0032] In use, by unscrewing the nut 17 from the outside of the threaded post 19, the limiting position of the dust filter plate 13 can be released, allowing the dust filter plate 13 to be pulled out from the fixing hole 12 for replacement or cleaning, ensuring the filtration effect. The filtration accuracy increases with the first screen plate 2 and the second screen plate 22. After the first screen plate 2 performs preliminary screening of the material, it is discharged into the second fixed chamber 11 on the left through the left discharge port. After the second screen plate 22 performs secondary screening, the material is discharged into the second fixed chamber 11 on the right through the right side of the screening machine 1. Finally, the material is discharged through the bottom discharge port of the screening machine 1. The support frame 23 and the vibration motor 24 work together to vibrate the bottom of the first screen plate 2 and the second screen plate 22. The vibration intensity is controlled by the PLC controller, which is simpler than the structure of motor, belt and eccentric wheel.

[0033] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0034] When the user needs to screen the coarse aggregate of concrete, the screening machine 1 is started and the air extractor 21 is activated to draw air into the filter chamber 3 through the air extraction pipe 20. The dust collection chamber 5 and the first fixed chamber 9 are kept under negative pressure through the first connecting pipe 4 and the second connecting pipe 7, so that air enters the first fixed chamber 9 and the dust collection chamber 5 through the air intake 10 and the dust intake 6. Several air intake 10 and several dust intake 6 surround the top hopper and the bottom discharge port of the screening machine 1, so that the dust generated during feeding enters the dust collection chamber 5 and the first connecting pipe 4 with the flowing air, and enters the filter chamber 3. Similarly, the dust cover 8 is set up to cover the bottom of the screening machine 1, and the dust generated enters the first fixed chamber 9, the second connecting pipe 7 and the filter chamber 3 with the flowing air. By starting the first fixed chamber 9 to contract, the dust cover 8 is raised and lowered, so that the dust cover 8 can block the dust as much as possible. During use, the user can set three parallel conveyor belts at the bottom of the screening machine 1 to transport the screened material.

[0035] When dust enters the filter chamber 3, it is filtered by the dust filter plates 13. The dust filter plates 13 on the left and right sides have different filtration accuracies, performing coarse and fine filtration respectively. In use, the dust removal nozzle 25 is connected to the air pipe and then connected to the pulse solenoid valve. The pulse solenoid valve is connected to the air pump outlet pipe. The pulse controller controls the solenoid valve to start once every three minutes, allowing high-pressure air to enter the dust removal nozzle 25. The high-pressure air is sprayed out by the horizontally inclined dust removal nozzle 25 and blown onto the dust filter plates 13 to perform pulse dust removal on their windward side. The dust falls into the dust collection drawer. Dust is collected inside the ash storage drawer 14. The ash storage drawer 14 can be fixed by installing a locking mechanism on both sides of the filter chamber 3 and the ash storage drawer 14. The ash storage drawer 14 can be pulled out from the support hole 26 to clean the dust by moving the locking mechanism. The above structure achieves the dust suction effect of the feeding port and the discharge port of the screening machine 1, reduces the dust generated during the processing, and improves the surrounding air quality. The dust is filtered twice by two dust filter plates 13, pulse dust removal is performed by dust removal nozzle 25, and dust is collected by the ash storage drawer 14. The ash storage drawer 14 can be pulled out for cleaning, which is highly practical.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A screening device for concrete coarse aggregate, comprising a screening machine (1), a first screen plate (2) is fixedly sleeved in the inside of the screening machine (1), and a PLC controller is fixedly installed on one side of the screening machine (1), characterized in that, Also include: The dust suction assembly is arranged on one side of the screening machine (1), which is used for dust suction. The dust suction assembly comprises: a filter bin (3) arranged on one side of the screening machine (1), a first connecting pipe (4) fixedly sleeved with the top surface air inlet hole of the filter bin (3), a dust suction bin (5) fixedly installed on the top surface of the feed hopper of the screening machine (1), a plurality of dust suction holes (6) are formed on the four sides of the inside of the dust suction bin (5), the air outlet of the dust suction bin (5) is fixedly sleeved with the first connecting pipe (4), a dust cover (8) is movably sleeved on the outside of the screening machine (1), a first fixed bin (9) is fixedly sleeved in the inside of the dust cover (8), a plurality of air suction holes (10) are respectively formed on the four sides of the inside of the first fixed bin (9), a first circular through hole is formed on one side of the dust cover (8), a second connecting pipe (7) is fixedly sleeved with the inner circular wall surface of the first circular through hole, and the inner circular wall surface of the air inlet hole on one side of the filter bin (3) is fixedly sleeved with the second connecting pipe (7). The dust filtering assembly is used for filtering, cleaning and collecting dust.

2. A device for sizing concrete coarse aggregate according to claim 1, characterized in that, The dust filtering assembly comprises: two fixed holes (12) formed on one side of the filter bin (3), a dust filter plate (13) movably sleeved in the inside of the filter bin (3), the dust filter plate (13) from right to left is decreasing in diameter, a support hole (26) is formed on one side of the filter bin (3), a dust storage drawer (14) is movably sleeved in the inside of the support hole (26), a plurality of second circular through holes are formed on one side of the filter bin (3), and a dust removal spray head (25) is fixedly sleeved with the inner circular wall surface of the second circular through hole.

3. A device for sizing concrete coarse aggregate according to claim 2, wherein A plurality of threaded columns (19) are fixedly installed on one side of the filter bin (3), a nut (17) is threadedly connected with the outer circular wall surface of the threaded column (19), two limiting holes (18) are formed on one side of the dust filter plate (13), and the limiting holes (18) are threadedly connected with the threaded column (19).

4. A device for sizing concrete coarse aggregate according to claim 3, wherein The inside of the dust storage drawer (14) is fixedly sleeved with a partition plate (15) and a baffle (16).

5. The apparatus of claim 1, wherein, The inner circular wall surface of the air outlet of the filter bin (3) is fixedly sleeved with an air suction pipe (20), the outer circular wall surface of the air suction pipe (20) is fixedly sleeved with an air suction machine (21), and the air suction machine (21) is electrically connected with the PLC controller.

6. A device for sizing coarse concrete aggregate according to claim 1, wherein The inside of the screening machine (1) is fixedly sleeved with a second screen plate (22), two second fixed bins (11) are fixedly installed on the two sides of the screening machine (1), a support frame (23) is fixedly installed on the bottom surface of the first screen plate (2) and the second screen plate (22), respectively, a vibration motor (24) is fixedly installed on the bottom surface of the support frame (23), and the vibration motor (24) is electrically connected with the PLC controller.

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