A dust collecting device for use in a concrete production process

Abstract

The utility model discloses a dust collecting device for concrete preparation process, including dust collecting tank and the hard connecting pipe of connecting in dust collecting tank one side, the easy folding hose is connected to the hard connecting pipe end, and the dust collecting cover is connected with easy folding hose, and the middle section of hard connecting pipe is equipped with air flow control valve, the bottom embedding of dust collecting tank is equipped with air -ejector, and the inside of dust collecting tank is equipped with first filter plate, and the below of first filter plate is equipped with second filter plate, the top outside of dust collecting tank is equipped with small -size foam generator, and the below of small -size foam generator is connected with foam spouts ring, and the bottom of foam spouts ring is evenly distributed with a plurality of spouts in array form. The design passes through the setting air flow control valve, to change the size of the section when the hard connecting pipe air current passes, to control the air current flow velocity of connecting pipe, realizes the switching of air current flow velocity size. And utilize small -size foam generator, to improve the dust fall rate in dust collecting tank in the way of spouting foam in the jar.

Description

Technical Field

[0001] This utility model relates to the field of concrete equipment technology, and in particular to a dust collection device used in the concrete preparation process. Background Technology

[0002] During concrete preparation, dust is generated from the physical handling of materials, impact from drops, airflow disturbances, and mechanical movements. Concrete dust is highly alkaline; skin contact can cause dermatitis, eczema, and even ulcers. The dust contains free silica, which, with prolonged inhalation, can lead to silicosis in workers. It also irritates the respiratory mucosa, inducing chronic bronchitis, emphysema, and even respiratory failure. Furthermore, dust suspended in the air forms PM2.5 to PM40 particles, which diffuse into surrounding areas, reducing air quality and impacting the living environment. When dust mixes with fresh concrete, it interferes with the hydration reaction, reducing compressive strength, durability, and density, and increasing the risk of cracking. Therefore, the dust generated during concrete preparation poses a significant hazard, requiring appropriate equipment for dust treatment to prevent further harm and impact.

[0003] During concrete preparation, the dust density generated by the physical handling of materials, drop impacts, airflow disturbances, and mechanical movements varies. When the dust density is high, the suction power needs to be increased to more effectively and thoroughly absorb and collect the dust. When the dust density is low, the suction power needs to be reduced to save equipment operating power, conserve energy consumption, and reduce production costs. Current technologies often require increasing the operating power of the exhaust fan or increasing the number of exhaust fans operating simultaneously to increase suction power. This method consumes a lot of energy, is costly, and is difficult to utilize effectively. Furthermore, dust collection also suffers from the drawback of ineffective dust deposition and collection. Therefore, a more environmentally friendly method is needed to control dust suction power and solve the existing collection problems. Utility Model Content

[0004] This utility model addresses the technical problem that dust collection equipment struggles to control dust collection intensity and slow dust collection and deposition in an environmentally friendly manner during concrete preparation. It provides a dust collection device for concrete preparation, comprising a dust collection tank and a rigid connecting pipe connected to one side of the dust collection tank. The rigid connecting pipe is connected to the dust collection tank, and its end is connected to a flexible hose and a dust collection hood connected to the flexible hose. An airflow control valve is provided in the middle section of the rigid connecting pipe.

[0005] An air extractor is embedded at the bottom of the dust collection tank, and the air outlet of the air extractor is located on the outside of the dust collection tank. A first filter plate is provided inside the dust collection tank, and a second filter plate is provided below the first filter plate.

[0006] A small foam generator is provided on the top outer side of the dust collection tank. A foam spray ring is connected to the bottom of the small foam generator and communicates with it. The foam spray ring is fixedly connected to the top center inside the dust collection tank. Multiple spray nozzles are evenly distributed in an array at the bottom of the foam spray ring.

[0007] Preferably, in the above technical solution, the dust collection hood has a cover edge at its end, the cover edge is rectangularly distributed, and the dust collection hood has multiple folded covers along its axial direction.

[0008] Preferably, in the above technical solution, the cover edge is provided with multiple threaded holes around its perimeter, and the cover edge is provided with multiple wing-shaped screws that match the threaded holes.

[0009] Preferably, in the above technical solution, a flexible rubber sheet is fixedly connected to the end of each of the butterfly screws.

[0010] Preferably, in the above technical solution, a fixing block is provided on the outside of the dust collection tank, and a clamp is fixedly connected to one side of the fixing block. The clamp is sleeved and fixed on the rigid connecting pipe.

[0011] Preferably, in the above technical solution, the first filter plate and the second filter plate are obliquely fixed inside the dust collection tank in a parallel manner.

[0012] Preferably, in the above technical solution, the dust collection tank has a discharge port at its waist, the position of which corresponds to the lower side of the first filter plate and the second filter plate, and the outer side of the dust collection tank is provided with a sealing door that matches the discharge port.

[0013] Preferably, in the above technical solution, one end of the sealing door is fixed to the dust collection tank by a hinge, and at least two rotating buckles are provided on the outside of the dust collection tank. The rotating buckles correspond to the position of the other end of the sealing door to ensure that the other end of the sealing door is fixed by the rotating buckles.

[0014] Preferably, in the above technical solution, the material of the second filter plate is a PTFE membrane.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention controls the airflow velocity in a rigid connecting pipe by installing an airflow control valve in the middle section, without changing the pumping power, simply by altering the cross-sectional area of ​​the pipe through which the airflow passes. It is applicable to various situations involving the emission of dust of different densities during concrete preparation, achieving airflow velocity switching in a relatively environmentally friendly manner.

[0017] This invention improves dust collection efficiency by installing a small foam generator at the top of the dust collection tank and spraying foam into the tank. The total volume of the foam increases hundreds of times, significantly increasing the contact area with the dust. Combined with the wetting and modifying effect of surfactants, efficient settling is achieved. Compared to water spray dust collection, water consumption is significantly reduced, and there is no issue of wet materials.

[0018] This invention features multiple folded covers along the axial direction of the dust collection hood, making the cross-sectional size of the dust collection hood adjustable. This allows for adjustments based on the different sizes of the equipment inlet during concrete preparation, making it easier to fit the dust collection hood onto the inlet and resulting in more efficient and thorough dust cleaning and collection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a dust collection device for concrete preparation process according to the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of the dust collection tank of a dust collection device for concrete preparation process according to the present invention.

[0021] Figure 3 for Figure 1 Enlarged view of the central dust hood and folding hood;

[0022] Figure 4 This is a top view of the connection between the butterfly screw and the folding cover in a dust collection device used in the concrete preparation process according to the present invention.

[0023] Figure 5 This is a schematic diagram of the foam spraying ring in a dust collection device used in the concrete preparation process according to the present invention.

[0024] Explanation of key figure labels:

[0025] 1-Dust collection tank, 2-Rigid connecting pipe, 3-Small foam generator, 11-Fixing block, 12-Ejector, 13-First filter plate, 14-Second filter plate, 15-Discharge port, 16-Rotating buckle, 17-Sealing door, 21-Easy-to-fold hose, 22-Dust collection hood, 23-Airflow control valve, 31-Foam spray ring, 32-Spray nozzle, 111-Clamp, 121-Air outlet, 221-Folded cover, 222-Cover edge, 223-Wing screw, 2221-Threaded hole, 2231-Flexible rubber sheet. Detailed Implementation

[0026] 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.

[0027] like Figures 1-5As shown, this utility model discloses a dust collection device for concrete preparation, comprising a dust collection tank 1 and a rigid connecting pipe 2 connected to one side of the dust collection tank 1. The rigid connecting pipe 2 is connected to the dust collection tank 1, and its end is connected to a flexible hose 21 and a dust collection hood 22 connected to the flexible hose 21. An airflow control valve 23 is provided in the middle section of the rigid connecting pipe 2. A fixing block 11 is provided on the outside of the dust collection tank 1, and a clamp 111 is fixedly connected to one side of the fixing block 11. The clamp 111 is sleeved and fixed on the rigid connecting pipe 2. In order to reduce stress concentration at the connection between the rigid connecting pipe 2 and the dust collection tank 1, the clamp 111 provides a support point for the connection of the rigid connecting pipe 2 and reinforces the installation and fixation of the rigid connecting pipe 2. The flexible hose 21 can be adjusted in angle and length according to the dust emission source in the actual environment to facilitate dust collection. An air extractor 12 is embedded at the bottom of the dust collection tank 1, with its outlet 121 located on the outside of the dust collection tank 1. A first filter plate 13 is located inside the dust collection tank 1, and a second filter plate 14 is located below the first filter plate 13. The cross-sectional area of ​​the rigid connecting pipe 2 can be adjusted by regulating the airflow control valve 23, thereby changing the flow rate within the pipe. When the dust density in the environment or equipment is high, rotating the airflow control valve 23 reduces the cross-sectional area within the valve, thus increasing the flow rate within the pipe and achieving rapid dust collection. When the dust density in the environment or equipment is low, restoring the cross-sectional area within the valve slows down the airflow within the pipe, reducing noise pollution caused by excessive flow and collecting dust at a reasonable flow rate. The second filter plate 14 is made of a PTFE membrane. The first filter plate 13 and the second filter plate 14, made of PTFE membrane material, provide dual filtration to ensure that dust settles on the first filter plate 13 and does not pass through the second filter plate 14. This ensures that the suction power in the dust collection tank 1 is not affected by the amount of dust, preventing dust from falling into the suction machine 12 and interfering with it. A small foam generator 3 is provided on the top outer side of the dust collection tank 1. A foam spray ring 31 is connected to the bottom of the small foam generator 3 and communicates with it. The foam spray ring 31 is fixedly connected to the top center of the dust collection tank 1. Multiple spray nozzles 32 are evenly distributed in an array at the bottom of the foam spray ring 31. The small foam generator 3 and the foam spray ring 31 generate foam and spray it into the tank from the top of the dust collection tank 1. When the device is running, the total volume of foam is hundreds of times larger than that of water mist, greatly increasing the contact area with the dust. Combined with the wetting modification effect of surfactants, efficient sedimentation is achieved. Compared to water spray dust settling, this method overcomes the shortcomings of uneven droplet distribution and poor wetting effect on hydrophobic dust. Furthermore, it significantly reduces overall water consumption, lowering costs while conserving water resources.

[0028] In this embodiment, the dust collection hood 22 has a cover edge 222 at its end, which is rectangular in shape. The dust collection hood 22 has multiple folded covers 221 along its axial direction. The folded covers 221 can extend and change shape, thereby increasing the area of ​​the dust collection hood 22. This can be adjusted according to different sized feed inlets to increase the coverage area for dust. Multiple threaded holes 2221 are provided around the cover edge 222, and multiple wing-shaped screws 223 that match the threaded holes 2221 are provided on the cover edge 222. A flexible rubber sheet 2231 is fixedly connected to the end of each wing-shaped screw 223. The threaded holes 2221 and the matching wing-shaped screws 223 around the cover edge 222 allow the dust collection hood 22 to be fixed by rotating the wing-shaped screws 223 after the folded covers 221 are stretched, causing the flexible rubber sheet 2231 at the end of the wing-shaped screw 223 to contact and abut against the feed inlet.

[0029] It should be further noted that the first filter plate 13 and the second filter plate 14 are obliquely fixed inside the dust collection tank 1 in a parallel manner. A discharge port 15 is provided at the waist of the dust collection tank 1, the position of which corresponds to the lower side of the first filter plate 13 and the second filter plate 14. A sealing door 17 matching the discharge port 15 is provided on the outer side of the dust collection tank 1. The first filter plate 13 and the second filter plate 14 are set in an oblique form, and a discharge port 15 is provided on the lower side of the oblique plate. When too much dust accumulates in the dust collection tank 1, it will accumulate obliquely on the side of the discharge port 15 for easy collection and cleaning. One end of the sealing door 17 is fixed to the dust collection tank 1 by a hinge. At least two rotating buckles 16 are provided on the outer side of the dust collection tank 1, the positions of which correspond to the other end of the sealing door 17, ensuring that the other end of the sealing door 17 is fixed by the rotating buckles 16. When it is necessary to clean the dust accumulated on the first filter plate 13, the rotating buckle 16 is turned to disengage it from the control of the sealing door 17, and it can be rotated open along the hinge at the other end to facilitate the dust cleaning work.

[0030] This invention controls the airflow velocity in a rigid connecting pipe by installing an airflow control valve in the middle section, without changing the pumping power, by altering the cross-sectional area of ​​the pipe through which the airflow passes. It is applicable to various situations involving dust of different densities during concrete preparation, achieving airflow velocity switching in a relatively environmentally friendly manner. A small foam generator is installed at the top of the dust collection tank to increase the dust reduction rate by spraying foam into the tank. The total volume of the foam increases hundreds of times, significantly increasing the contact area with the dust. Combined with the wetting modification effect of surfactants, efficient settling is achieved. Compared to water spray dust suppression, water consumption is significantly reduced, and there is no wet material. Furthermore, multiple folding covers are installed axially in the dust collection hood, making its cross-sectional size adjustable. This allows for adjustment according to the different sizes of the equipment inlet during concrete preparation, making it easier to fit the dust collection hood onto the inlet, resulting in more efficient and thorough dust cleaning and collection. This invention solves the problem of controlling dust suction power and slow dust deposition inside the tank in a more environmentally friendly and effective way during the concrete preparation process, thereby improving the efficiency of dust cleaning and collection.

[0031] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A dust collection device for use in the concrete preparation process, characterized in that: It includes a dust collection tank (1) and a rigid connecting pipe (2) connected to one side of the dust collection tank (1). The rigid connecting pipe (2) is connected to the dust collection tank (1), and its end is connected to a flexible hose (21) and a dust collection cover (22) connected to the flexible hose (21). An airflow control valve (23) is provided in the middle section of the rigid connecting pipe (2). The bottom of the dust collection tank (1) is fitted with an air extractor (12), the air outlet (121) of the air extractor (12) is located on the outside of the dust collection tank (1), the inside of the dust collection tank (1) is provided with a first filter plate (13), and a second filter plate (14) is provided below the first filter plate (13). A small foam generator (3) is provided on the outer side of the top of the dust collection tank (1). A foam spray ring (31) is connected to the bottom of the small foam generator (3) and communicates with the small foam generator (3). The foam spray ring (31) is fixedly connected to the top center inside the dust collection tank (1). Multiple spray nozzles (32) are evenly distributed in an array at the bottom of the foam spray ring (31).

2. The dust collection device for concrete preparation process according to claim 1, characterized in that: The dust collection hood (22) has a cover edge (222) at its end, the cover edge (222) is rectangular, and the dust collection hood (22) has multiple folded covers (221) along its axial direction.

3. The dust collection device for concrete preparation process according to claim 2, characterized in that: The cover edge (222) is provided with a plurality of threaded holes (2221) around its perimeter, and the cover edge (222) is provided with a plurality of wing screws (223) that match the threaded holes (2221).

4. The dust collection device for concrete preparation process according to claim 3, characterized in that: Each of the butterfly screws (223) has a flexible rubber sheet (2231) fixedly connected to its screw end.

5. The dust collection device for concrete preparation process according to claim 1, characterized in that: The dust collection tank (1) has a fixing block (11) on its outer side. A clamp (111) is fixedly connected to one side of the fixing block (11). The clamp (111) is sleeved and fixed on the rigid connecting pipe (2).

6. A dust collection device for concrete preparation process according to claim 1, characterized in that: The first filter plate (13) and the second filter plate (14) are fixedly installed inside the dust collection tank (1) in a parallel manner.

7. The dust collection device for concrete preparation process according to claim 6, characterized in that: The dust collection tank (1) has a discharge port (15) at its waist. The position of the discharge port (15) corresponds to the lower side of the first filter plate (13) and the second filter plate (14). The outer side of the dust collection tank (1) is provided with a sealing door (17) that matches the discharge port (15).

8. The dust collection device for concrete preparation process according to claim 7, characterized in that: One end of the sealing door (17) is fixed to the dust collection tank (1) by a hinge. At least two rotating buckles (16) are provided on the outside of the dust collection tank (1). The rotating buckles (16) correspond to the position of the other end of the sealing door (17) to ensure that the other end of the sealing door (17) is fixed by the rotating buckles (16).

9. The dust collection device for concrete preparation process according to claim 1, characterized in that: The material of the second filter plate (14) is a PTFE membrane.

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