A multi-stage sand and gravel screening device for a concrete mixing plant

Abstract

This utility model belongs to the field of sand and gravel screening technology, specifically a multi-stage sand and gravel screening device for concrete mixing plants, including a screening platform; a support frame is fixedly connected to the top of the screening platform; a pair of support frames are arranged symmetrically on the top of the screening platform; a multi-stage screening component is provided on the top of the pair of support frames; a dust removal component is provided on the support frame through the multi-stage screening component; a material feeding component is provided on the top of the screening platform; a cleaning component is provided on the screening platform through the material feeding component; and a protective component is provided on the top of the support frame. Through the above structure, the multi-stage screening component performs multi-stage screening of sand and gravel, forming a multi-stage sand and gravel screening structure, realizing the function of multi-stage screening of sand and gravel in a single input device, solving the problem of multiple operations required for sand and gravel screening, improving the convenience of multi-stage sand and gravel screening, and simplifying the operation steps of sand and gravel screening.

Description

Technical Field

[0001] This utility model belongs to the field of sand and gravel screening technology, specifically a multi-stage sand and gravel screening device for concrete mixing plants. Background Technology

[0002] Concrete mixing is the process of mixing cement, sand, gravel, water, and admixtures in a certain proportion and mixing them evenly to ensure that the concrete reaches the strength, durability, and workability required by the design.

[0003] When producing concrete, concrete mixing plants need to use sand and gravel aggregates of different particle sizes for different types of concrete. The sand and gravel aggregates need to be screened. Each screening can only separate one type of sand and gravel aggregate. When classifying the sand and gravel aggregate according to different particle sizes, multiple screenings are required, which makes the operation process quite complicated.

[0004] Therefore, this utility model provides a multi-stage screening device for sand and gravel in a concrete mixing plant. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A multi-stage screening device for sand and gravel in a concrete mixing plant, comprising a screening platform; a support frame fixedly connected to the top of the screening platform; a pair of support frames symmetrically arranged on the top of the screening platform; a multi-stage screening component on the top of the pair of support frames; a dust removal component on the support frame via the multi-stage screening component; a material feeding component on the top of the screening platform; a cleaning component on the screening platform via the material feeding component; and a protective component on the top of the support frame. Through the above structure, the multi-stage screening component performs multi-stage screening of sand and gravel, forming a multi-stage screening structure for sand and gravel, realizing the function of multi-stage screening of sand and gravel in a single input device, solving the problem of multiple operations required for sand and gravel screening, improving the convenience of multi-stage screening of sand and gravel, and simplifying the operation steps of sand and gravel screening.

[0007] Preferably, the multi-stage screening assembly includes a fixed frame, a screening cylinder, a drive motor, gears, and a gear ring; the fixed frame is fixedly connected to the top of a pair of support frames; multiple sets of fixed frames are arranged on the top of the support frames; the screening cylinder is rotatably connected to the middle of the multiple sets of fixed frames; multiple sets of filter holes are opened on the outer wall of the screening cylinder; the screening cylinder is inclined; the drive motor is installed on the side wall of one set of fixed frames near the screening cylinder; the gear is fixedly connected to the transmission end of the drive motor; the gear ring is installed on the outer wall of the screening cylinder near the gear; the gear meshes with the gear ring; a material guiding assembly is provided on the side wall of the fixed frame; through the above structure, the screening cylinder is set to screen sand and gravel in multiple stages, forming a multi-stage screening structure for sand and gravel, realizing the function of multi-stage screening of sand and gravel, solving the problem of multiple screening operations required during sand and gravel screening, improving the convenience of multi-stage sand and gravel screening, and simplifying the operation steps of sand and gravel screening.

[0008] Preferably, the dust removal assembly includes a fixed plate, a water distribution pipe, a water inlet pipe, and nozzles; the fixed plate is fixedly connected to the side wall of a fixed frame near the end of the screening cylinder; the water distribution pipe is fixedly connected to the middle of a pair of fixed plates; the nozzles are fixedly connected to the bottom of the water distribution pipe; multiple sets of nozzles are arranged at the bottom of the water distribution pipe and are evenly distributed at the bottom of the water distribution pipe; the water inlet pipe is installed on the side wall of the fixed plate near the end of the water distribution pipe; the nozzles are connected to the water inlet pipe through the water distribution pipe; through the above structure, the water pump pumps clean water into the water distribution pipe and sprays water into the screening cylinder through the nozzles, forming a dust removal structure of the device, realizing the function of dust reduction inside the screening cylinder, solving the problem of dust overflowing and polluting the air when sand and gravel roll in the screening cylinder, improving the dust reduction capacity of the device, and reducing the pollution caused by dust floating in the air.

[0009] Preferably, the feeding assembly includes a collection box, a filter screen, a drain outlet, and a drain pipe; the collection box is installed on top of the screening table; multiple sets of collection boxes are arranged on top of the screening table; the filter screen is fixedly connected to the inner side wall of the collection box; a feeding port is opened on the side wall of the collection box; the drain outlet is opened at the bottom of the collection box; the drain pipe is installed in the middle of the multiple sets of drain outlets; through the above structure, the filter screen is set to filter and separate sand and gravel and sewage, forming a sand and gravel feeding structure, realizing the functions of collecting screened sand and gravel and filtering sewage, improving the convenience of sand and gravel collection, and improving the convenience of sand and gravel and sewage separation.

[0010] Preferably, the cleaning component includes a cleaning brush; the cleaning brush is fixedly connected to the side wall of the collection box near the support frame; a pair of cleaning brushes are arranged symmetrically on the side wall of the collection box; through the above structure, the cleaning brushes clean the outer wall of the screening cylinder, forming a cleaning structure for the outer wall of the screening cylinder, realizing the function of cleaning the outer wall of the screening cylinder, reducing the adhesion of sludge or foreign objects to the outer wall of the screening cylinder, and reducing the problem of clogging of the screening cylinder.

[0011] Preferably, the protective component includes a protective plate; the protective plate is hinged to the top of the support frame; the protective plate is provided on the top of both a pair of support frames; through the above structure, the protective plate is designed to block the sewage or impurities thrown out by the screening cylinder, forming a protective structure for the device, reducing the problem of sewage or sludge thrown out by the screening cylinder adhering to other equipment and causing equipment damage.

[0012] Preferably, the material guiding assembly includes a material guiding trough; the material guiding trough is fixedly connected to the side wall of the fixed frame near the discharge end of the screening cylinder; when the sand and gravel inside the screening cylinder fall from the discharge end of the screening cylinder, the material guiding trough guides the sand and gravel, and a collection container is placed below the material guiding trough to guide the falling sand and gravel, thereby improving the smoothness of the falling sand and gravel and reducing the problem of sand and gravel scattering on the ground.

[0013] The beneficial effects of this utility model are as follows: 1. The present invention relates to a multi-stage screening device for sand and gravel in a concrete mixing plant. By setting up a multi-stage screening component to screen sand and gravel in multiple stages, a multi-stage screening structure for sand and gravel is formed, realizing the function of multi-stage screening of sand and gravel in a single input device. This solves the problem of multiple operations required for sand and gravel screening, improves the convenience of multi-stage screening of sand and gravel, and simplifies the operation steps of sand and gravel screening.

[0014] 2. The multi-stage screening device for sand and gravel in a concrete mixing plant described in this utility model sets up a multi-stage screening structure for sand and gravel by screening cylinders, thereby realizing the function of multi-stage screening of sand and gravel, solving the problem of multiple screening operations required during sand and gravel screening, improving the convenience of multi-stage screening of sand and gravel, and simplifying the operation steps of sand and gravel screening. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the screening cylinder and the support frame in this utility model; Figure 3 This is a schematic diagram of the structure of the nozzle and the screening cylinder in this utility model; Figure 4 This is a schematic diagram of the structure of the filter screen and the collection box in this utility model; Figure 5 This is a schematic diagram of the structure of the screening cylinder and the drive motor in this utility model.

[0017] In the diagram: 1. Screening table; 11. Support frame; 12. Fixing frame; 13. Screening cylinder; 14. Drive motor; 15. Gear; 16. Gear ring; 2. Fixing plate; 21. Water distribution pipe; 22. Water inlet pipe; 23. Nozzle; 3. Collection box; 31. Filter screen; 32. Drain outlet; 33. Drain pipe; 4. Cleaning brush; 5. Protective plate; 6. Material guide chute. Detailed Implementation

[0018] 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.

[0019] like Figures 1 to 5 As shown in the figure, a multi-stage screening device for sand and gravel in a concrete mixing plant according to an embodiment of the present invention includes a screening platform 1; a support frame 11 is fixedly connected to the top of the screening platform 1; a pair of support frames 11 are arranged symmetrically on the top of the screening platform 1; a multi-stage screening component is provided on the top of the pair of support frames 11; a dust removal component is provided on the support frame 11 through the multi-stage screening component; a material feeding component is provided on the top of the screening platform 1; a cleaning component is provided on the screening platform 1 through the material feeding component; and a protective component is provided on the top of the support frame 11. During operation, the multi-stage screening component is started, and the multi-stage screening component rotates, feeding the sand and gravel to be screened into the multi-stage screening component. The sand and gravel roll and move downwards within the multi-stage screening component, with smaller particles being screened first. The sand and gravel are separated and enter the feeding assembly. Larger particles continue to roll within the multi-stage screening assembly and move along its inner wall before falling at a suitable position, completing the multi-stage screening of sand and gravel. Simultaneously, the dust removal assembly sprays water to reduce dust, the cleaning assembly cleans the outer wall of the multi-stage screening assembly, and the protective assembly blocks the wastewater ejected during the rotation of the multi-stage screening assembly. Through the above structure, the multi-stage screening assembly performs multi-stage screening of sand and gravel, forming a multi-stage screening structure for sand and gravel. This achieves the function of multi-stage screening of sand and gravel in a single feeding device, solving the problem of requiring multiple operations during sand and gravel screening, improving the convenience of multi-stage screening, and simplifying the operation steps of sand and gravel screening.

[0020] like Figure 1 , Figure 2 and Figure 5As shown, the multi-stage screening assembly includes a fixed frame 12, a screening cylinder 13, a drive motor 14, a gear 15, and a gear ring 16. The fixed frame 12 is fixedly connected to the top of a pair of support frames 11. Multiple sets of fixed frames 12 are arranged on the top of the support frames 11. The screening cylinder 13 is rotatably connected to the middle of the multiple sets of fixed frames 12. Multiple sets of filter holes are opened on the outer wall of the screening cylinder 13. The screening cylinder 13 is inclined. The drive motor 14 is installed on the side wall of a set of fixed frames 12 near the screening cylinder 13. The gear 15 is fixedly connected to the transmission end of the drive motor 14. The gear ring 16 is installed on the outer wall of the screening cylinder 13 near the gear 15. The gear 15 meshes with the gear ring 16. A material guiding assembly is provided on the side wall of the fixed frame 12. During operation, the drive motor 14 is started, and the drive motor 14 drives the gear 15. The gear 15 rotates, driving the gear ring 16 and the screening cylinder 13 to rotate. The screening cylinder 13 is inclined, with the higher end of the screening cylinder 13 being the feeding end and the lower end being the discharge end. The filter holes on the outer wall of the screening cylinder 13 gradually increase in size from high to low. The sand and gravel are fed into the screening cylinder 13 from the feeding end. The sand and gravel roll and move downwards inside the screening cylinder 13. Smaller sand and gravel particles are screened out first, while larger sand and gravel particles continue to move downwards and fall at a suitable position. Through the above structure, the screening cylinder 13 is set up to perform multi-stage screening of sand and gravel, forming a multi-stage screening structure for sand and gravel. This realizes the function of multi-stage screening of sand and gravel, solves the problem of needing multiple screening operations when screening sand and gravel, improves the convenience of multi-stage screening of sand and gravel, and simplifies the operation steps of sand and gravel screening.

[0021] like Figure 2 and Figure 3 As shown, the dust removal assembly includes a fixed plate 2, a water distribution pipe 21, an inlet pipe 22, and nozzles 23. The fixed plate 2 is fixedly connected to the side wall of the fixed frame 12 near the end of the screening cylinder 13. The water distribution pipe 21 is fixedly connected to the middle of a pair of fixed plates 2. The nozzles 23 are fixedly connected to the bottom of the water distribution pipe 21. Multiple sets of nozzles 23 are arranged at the bottom of the water distribution pipe 21 and are evenly distributed at the bottom of the water distribution pipe 21. The inlet pipe 22 is installed on the side wall of the fixed plate 2 near the end of the water distribution pipe 21. The nozzles 23 communicate with the inlet pipe 22 through the water distribution pipe 21. During operation, a water pump is connected to the inlet pipe 22. Clean water is discharged from nozzle 23 through inlet pipe 22 and distribution pipe 21. Nozzle 23 sprays water on the sand and gravel in screening cylinder 13 to remove dust. Through the above structure, the water pump pumps clean water into distribution pipe 21 and sprays water on the screening cylinder 13 through nozzle 23, forming a dust removal structure of the device. This realizes the function of dust reduction inside screening cylinder 13, solves the problem of dust overflowing and polluting the air when sand and gravel roll in screening cylinder 13, improves the dust reduction capacity of the device, and reduces the pollution caused by dust floating in the air.

[0022] like Figure 1 and Figure 4As shown, the feeding assembly includes a collection box 3, a filter screen 31, a drain outlet 32, and a drain pipe 33. The collection box 3 is installed on the top of the screening platform 1. Multiple sets of collection boxes 3 are arranged on the top of the screening platform 1. The filter screen 31 is fixedly connected to the inner side wall of the collection box 3. A feeding outlet is opened on the side wall of the collection box 3. The drain outlet 32 ​​is opened at the bottom of the collection box 3. The drain pipe 33 is installed in the middle of the multiple sets of drain outlets 32. During operation, the screened sand and gravel fall onto the filter screen 31 inside the collection box 3. Wastewater is filtered through the filter screen 31, falls into the bottom of the collection box 3, and is discharged through the drain outlet 32 ​​and the drain pipe 33. The sand and gravel are guided by the filter screen 31 and discharged from the feeding outlet. Through the above structure, the filter screen 31 is set to filter and separate sand and gravel and wastewater, forming a sand and gravel feeding structure, realizing the functions of collecting screened sand and gravel and filtering wastewater, improving the convenience of sand and gravel collection, and improving the convenience of sand and gravel and wastewater separation.

[0023] like Figure 2 As shown, the cleaning assembly includes a cleaning brush 4; the cleaning brush 4 is fixedly connected to the side wall of the collection box 3 near the support frame 11; a pair of cleaning brushes 4 are arranged symmetrically on the side wall of the collection box 3; during operation, the cleaning brush 4 contacts the outer wall of the screening cylinder 13, and when the screening cylinder 13 rotates, the cleaning brush 4 cleans the outer wall of the screening cylinder 13, sweeping off the sludge or impurities adhering to the outer wall of the screening cylinder 13; through the above structure, the setting of the cleaning brush 4 to clean the outer wall of the screening cylinder 13 forms the outer wall cleaning structure of the screening cylinder 13, realizing the function of cleaning the outer wall of the screening cylinder 13, reducing the situation of sludge or foreign objects adhering to the outer wall of the screening cylinder 13, and reducing the problem of clogging of the screening cylinder 13.

[0024] like Figure 1 As shown, the protective assembly includes a protective plate 5; the protective plate 5 is hinged to the top of the support frame 11; the protective plate 5 is provided on the top of both pairs of support frames 11; during operation, rotating the protective plate 5 causes it to shield the outer wall of the screening cylinder 13, blocking the wastewater or impurities thrown out by the screening cylinder 13; through the above structure, the protective plate 5 blocks the wastewater or impurities thrown out by the screening cylinder 13, forming a protective structure for the device, reducing the problem of wastewater or sludge thrown out by the screening cylinder 13 adhering to other equipment and causing equipment damage.

[0025] like Figure 2 As shown, the material guiding assembly includes a material guiding trough 6; the material guiding trough 6 is fixedly connected to the side wall of the fixed frame 12 near the discharge end of the screening cylinder 13; during operation, when the sand and gravel inside the screening cylinder 13 fall from the discharge end of the screening cylinder 13, the material guiding trough 6 guides the sand and gravel, and the collection container is placed below the material guiding trough 6 to guide the falling sand and gravel, thereby improving the smoothness of the falling sand and gravel and reducing the problem of sand and gravel scattering on the ground.

[0026] During operation, the multi-stage screening unit is activated and rotates. The sand and gravel to be screened are fed into the unit, where they roll and descend. Smaller particles detach first and enter the feeding component, while larger particles continue rolling and moving along the inner wall of the multi-stage screening unit before falling at the appropriate location, completing the multi-stage screening. Simultaneously, a dust removal component sprays water to suppress dust, a cleaning component cleans the outer wall of the multi-stage screening unit, and a protective component... The wastewater ejected during the rotation of the multi-stage screening components is blocked. The drive motor 14 is started, which drives the gear 15 to rotate. The gear 15 then drives the gear ring 16 and the screening cylinder 13 to rotate. The screening cylinder 13 is inclined, with the higher end being the feeding end and the lower end being the discharge end. The filter holes on the outer wall of the screening cylinder 13 gradually increase in size from high to low. Sand and gravel are fed into the screening cylinder 13 from the feeding end. The sand and gravel roll and move downwards within the screening cylinder 13, with smaller particles being screened out first, and larger particles continuing to move downwards. The screen moves and falls to the appropriate position; the water pump is connected to the inlet pipe 22, and clean water is discharged from the nozzle 23 through the inlet pipe 22 and the distribution pipe 21. The nozzle 23 sprays water on the sand and gravel in the screening cylinder 13 to remove dust from the sand and gravel; the screened sand and gravel fall onto the filter screen 31 inside the collection box 3, and the wastewater is filtered through the filter screen 31, falls into the bottom of the collection box 3, and is discharged through the drain outlet 32 ​​and the drain pipe 33. The sand and gravel are guided by the filter screen 31 and discharged from the discharge port; the cleaning brush 4 contacts the outer wall of the screening cylinder 13 to screen. When the cylinder 13 rotates, the cleaning brush 4 sweeps the outer wall of the screening cylinder 13, removing the sludge or impurities adhering to the outer wall of the screening cylinder 13; the protective plate 5 rotates and blocks the outer wall of the screening cylinder 13, blocking the sewage or impurities thrown out by the screening cylinder 13; when the sand and gravel inside the screening cylinder 13 fall from the discharge end of the screening cylinder 13, the guide chute 6 guides the sand and gravel, and the collection container is placed below the guide chute 6 to guide the falling sand and gravel, improving the smoothness of the falling sand and gravel and reducing the problem of sand and gravel scattering on the ground.

[0027] 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage screening device for sand and gravel in a concrete mixing plant, comprising a screening table (1); characterized in that: The top of the screening table (1) is fixedly connected to a support frame (11); a pair of support frames (11) are provided on the top of the screening table (1) and are arranged symmetrically; a multi-stage screening component is provided on the top of the pair of support frames (11); a dust removal component is provided on the support frame (11) through the multi-stage screening component; a feeding component is provided on the top of the screening table (1); a cleaning component is provided on the screening table (1) through the feeding component; and a protective component is provided on the top of the support frame (11).

2. The multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 1, characterized in that: The multi-stage screening assembly includes a fixed frame (12), a screening cylinder (13), a drive motor (14), a gear (15), and a gear ring (16); the fixed frame (12) is fixedly connected to the top of a pair of support frames (11); multiple sets of fixed frames (12) are provided on the top of the support frames (11); the screening cylinder (13) is rotatably connected to the middle of the multiple sets of fixed frames (12); multiple sets of filter holes are opened on the outer wall of the screening cylinder (13); the screening cylinder (13) is inclined; the drive motor (14) is installed on the side wall of a set of fixed frames (12) near the screening cylinder (13); the gear (15) is fixedly connected to the transmission end of the drive motor (14); the gear ring (16) is installed on the outer wall of the screening cylinder (13) near the gear (15); the gear (15) meshes with the gear ring (16); the side wall of the fixed frame (12) is provided with a material guiding assembly.

3. The multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 2, characterized in that: The dust removal assembly includes a fixed plate (2), a water distribution pipe (21), an inlet pipe (22), and a nozzle (23); the fixed plate (2) is fixedly connected to the side wall of the fixed frame (12) near the end of the screening cylinder (13); the water distribution pipe (21) is fixedly connected to the middle of a pair of fixed plates (2); the nozzle (23) is fixedly connected to the bottom of the water distribution pipe (21); multiple sets of nozzles (23) are provided at the bottom of the water distribution pipe (21) and are evenly distributed at the bottom of the water distribution pipe (21); the inlet pipe (22) is installed on the side wall of the fixed plate (2) near the end of the water distribution pipe (21); the nozzle (23) is connected to the inlet pipe (22) through the water distribution pipe (21).

4. The multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 1, characterized in that: The feeding assembly includes a collection box (3), a filter screen (31), a drain outlet (32), and a drain pipe (33); the collection box (3) is installed on the top of the screening table (1); multiple sets of collection boxes (3) are provided on the top of the screening table (1); the filter screen (31) is fixedly connected to the inner side wall of the collection box (3); the side wall of the collection box (3) is provided with a feeding port; the drain outlet (32) is located at the bottom of the collection box (3); the drain pipe (33) is installed in the middle of the multiple sets of drain outlets (32).

5. A multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 4, characterized in that: The cleaning assembly includes a cleaning brush (4); the cleaning brush (4) is fixedly connected to the side wall of the collection box (3) near the support frame (11); a pair of cleaning brushes (4) are provided on the side wall of the collection box (3) and are arranged symmetrically.

6. A multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 2, characterized in that: The protective assembly includes a protective plate (5); the protective plate (5) is hinged to the top of the support frame (11); the protective plate (5) is provided on the top of a pair of support frames (11).

7. A multi-stage screening device for sand and gravel in a concrete mixing plant according to claim 2, characterized in that: The material guiding assembly includes a material guiding trough (6); the material guiding trough (6) is fixedly connected to the side wall of the fixed frame (12) near the discharge end of the screening cylinder (13).

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