A powder coating filtration device

Abstract

This utility model relates to the field of spraying equipment technology, specifically a powder coating filtration device, including a filter box, a fan, a first filter screen, an air inlet plate, and at least one elastic component. The filter box has an air inlet and an air outlet. The fan is fixedly installed in the air inlet, and the first filter screen is fixedly installed in the inner cavity of the filter box. The air inlet plate is fixedly installed in the inner cavity of the filter box and located between the fan and the first filter screen, and has a main ventilation hole and at least one secondary ventilation hole with a diameter different from that of the main ventilation hole. The first elastic component is fixedly connected at both ends to the first filter screen and the side wall of the filter box, respectively, and is used to cause the first filter screen to vibrate when the fan is working. This utility model has a simple and ingenious overall structure, which can shake off the powder coating adhering to the surface of the first filter screen, and has good practicality.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, specifically a powder coating filtration device. Background Technology

[0002] Powder coating involves spraying powder coating onto the surface of a workpiece using powder spraying equipment. Under electrostatic attraction, the powder adheres evenly to the workpiece surface, forming a powdery coating. This powdery coating is then baked at high temperature to achieve leveling and curing, resulting in a final coating with varying effects (depending on the type of powder coating). Powder coating offers superior mechanical strength, adhesion, corrosion resistance, and aging resistance compared to spray painting, but at a higher cost. However, during powder coating, some powder particles are released into the air. Inhaling these particles can be harmful to human health. Furthermore, allowing the powder to remain in the air without treatment will pollute the environment. Therefore, it is essential to filter and recycle the powder coating in the air during the coating process.

[0003] Generally, filtering powder coatings in the air includes methods such as first-stage filtration and water washing filtration. For example, Chinese utility model application CN202123353573.7 provides an exhaust system for a powder coating booth. This system uses a first and a second filter to perform dual filtration of particulate impurities in the air, effectively removing them. After the first and second filters have been used for a period of time, a hydraulic cylinder drives a scraper to move, cleaning the powder particles accumulated under the first and second filters. The cleaned powder particles fall into a storage box for storage.

[0004] The exhaust system of this powder coating booth uses a hydraulic cylinder to drive a scraper to clean the powder particles accumulated under the first filter screen. Each first filter screen needs to be equipped with a set of hydraulic cylinders and scrapers, which increases the complexity of the powder coating filtration structure overall, and there is room for further optimization of its structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a powder coating filtration device. By incorporating a first elastic component, the first filter screen vibrates during fan operation, thereby shaking off the powder coating adhering to the filter screen. This eliminates the need for an additional hydraulic cylinder, resulting in a relatively simple and ingenious overall structure. The specific technical solution is as follows:

[0006] A powder coating filtration device includes a filter box, a fan, and a first filter screen. The filter box has an air inlet and an air outlet. The fan is fixedly installed in the air inlet, and the first filter screen is fixedly installed in the inner cavity of the filter box. The powder coating filtration device further includes:

[0007] An air inlet plate is fixedly installed in the inner cavity of the filter box and located between the fan and the first filter screen. It is provided with a main ventilation hole and at least one secondary ventilation hole with a diameter different from that of the main ventilation hole.

[0008] At least one first elastic component, with its two ends fixedly connected to the first filter screen and the side wall of the filter box respectively, is used to cause the first filter screen to vibrate when the fan is working.

[0009] The powder coating filter device, by providing at least one secondary ventilation hole on the air inlet plate with a diameter different from that of the main ventilation hole, can generate turbulence in the air passing through the air inlet plate when the fan is working. The turbulence impacts the first filter screen, causing the first elastic component to vibrate, which in turn causes the first filter screen to shake irregularly, shaking off the powder coating adhering to the surface of the first filter screen.

[0010] By incorporating an air inlet plate and elastic components, the overall structure of the powder coating filter device is simpler and more ingenious than existing exhaust systems for powder coating booths. Furthermore, since it eliminates the need for hydraulic cylinders, the overall cost of the powder coating filter device is lower than that of existing exhaust systems for powder coating booths, making it highly practical.

[0011] Preferably, the powder coating filtration device further includes:

[0012] The first powder collection box is installed at the bottom of the first filter screen, and has a powder collection trough with a baffle plate on the side of the powder collection trough near the fan.

[0013] The wind deflector is inclined upwards along the direction of the fan toward the first filter screen.

[0014] Preferably, the bottom of the inner cavity of the filter box located between the fan and the first filter screen is provided with a mounting hole of a size that matches the first powder collection box, and the first powder collection box is detachably fixedly installed in the mounting hole.

[0015] Preferably, the powder coating apparatus further includes:

[0016] Multiple second filter screens are arranged in parallel at intervals and installed in the inner cavity of the filter box, with the multiple second filter screens located between the first filter screen and the air outlet.

[0017] Preferably, the powder coating filter further includes:

[0018] The second elastic component is installed between multiple second filter screens, and both ends of the second elastic component are fixedly connected to two adjacent second filter screens respectively.

[0019] Preferably, the powder coating filter further includes:

[0020] The second powder collection box is installed on the filter box and located directly below the second filter screen;

[0021] The upper inlet of the second powder collection box is connected to the inner cavity of the filter box.

[0022] Preferably, the second powder collection box includes multiple inlets, with each second filter screen corresponding to one inlet, and the inlets are funnel-shaped.

[0023] Preferably, both the first elastic component and the second elastic component are helical springs.

[0024] Preferably, the first filter screen is a stainless steel filter screen, a nylon filter screen, or a non-woven fabric filter screen. Attached Figure Description

[0025] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0026] Figure 1 This is a schematic diagram of the overall structure of a powder coating filtration device according to one embodiment of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of a powder coating filtration device according to one embodiment of the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the air inlet plate in one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the overall structure of a powder coating filtration device according to one embodiment of the present invention. Figure 3 ;

[0030] Figure 5 This is a schematic diagram of the air inlet structure in one embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall structure of a powder coating filtration device according to one embodiment of the present invention. Figure 4 .

[0032] In the diagram: 1. Filter box; 2. Air inlet plate; 3. Air inlet; 4. Air outlet; 5. First filter screen; 6. First elastic component; 7. First powder collection box; 8. Baffle plate; 9. Second filter screen; 10. Second elastic component; 11. Second powder collection box; 12. Inlet; 20. Main ventilation hole; 21. Secondary ventilation hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0037] like Figure 1 , Figure 3 , Figure 5 as well as Figure 6 As shown, a powder coating filtration device includes a filter box 1, a fan, and a first filter screen 5. The filter box 1 has an inner cavity, an air inlet 3, and an air outlet 4. The fan is fixedly installed in the air inlet 3 and is used to draw air from the powder coating spraying booth to the filter box 1.

[0038] The first filter screen 5 is fixedly installed in the inner cavity of the filter box 1. Specifically, the first filter screen 5 can be a stainless steel filter screen, a nylon filter screen, or a non-woven fabric filter screen, which has a certain elasticity. When the first elastic component 6 extends and retracts along the axial direction, it can generate a certain vibration under the elastic force of the first elastic component 6.

[0039] The powder coating filter device also includes an air inlet plate 2 and at least one elastic component.

[0040] The air inlet plate 2 is fixedly installed in the inner cavity of the filter box 1 and located between the fan and the first filter screen 5. It is provided with a main ventilation hole 20 and at least one secondary ventilation hole 21 with a diameter different from that of the main ventilation hole 20. The purpose of providing at least one secondary ventilation hole 21 with a diameter different from that of the main ventilation hole 20 is to create turbulence in the airflow generated by the fan when it flows through both the main ventilation hole 20 and the secondary ventilation hole 21, thereby increasing the vibration of the first filter screen 5. This vibration of the first filter screen 5 causes the first elastic component 6 to vibrate, and the change in elasticity of the first elastic component 6 further enhances the vibration of the first filter screen 5.

[0041] At least one first elastic component 6, with its two ends fixedly connected to the first filter screen 5 and the side wall of the filter box 1 respectively, is used to cause the first filter screen 5 to vibrate when the fan is working. The first elastic component 6 is preferably a helical spring.

[0042] Thus, the turbulence generated by the air inlet plate 2 can cause the first filter screen 5 to vibrate to a certain extent. The combination of the air inlet plate 2 and the first elastic component 6 can further enhance the shaking of the first filter screen 5, so as to better shake off the powder coating adhering to the first filter screen 5.

[0043] The powder coating filter device, by providing at least one secondary ventilation hole 21 on the air inlet plate 2 with a diameter different from that of the main ventilation hole 20, can generate turbulence in the air passing through the air inlet plate 2 when the fan is working. The turbulence impacts the first filter screen 5, causing the first elastic component 6 to vibrate, which in turn causes the first filter screen 5 to shake irregularly, shaking off the powder coating adhering to the surface of the first filter screen 5.

[0044] In summary, by incorporating the air inlet plate 2 and the elastic component, the overall structure of the powder coating filter device is simpler and more ingenious than that of existing powder coating booth exhaust devices. Furthermore, since a hydraulic cylinder is not required, the overall cost of the powder coating filter device is lower than that of existing powder coating booth exhaust devices, making it highly practical.

[0045] As a preferred technical solution, such as Figure 1 As shown, the powder coating filtration device also includes a first powder collection box 7.

[0046] The first powder collection box 7 is installed at the bottom of the first filter screen 5, and is provided with a powder collection trough and a baffle plate 8 is provided on the side of the powder collection trough near the fan; wherein, the baffle plate 8 is inclined upward along the direction of the fan toward the first filter screen 5.

[0047] Specifically, the first powder collection box 7 is located between the first filter screen 5 and the air inlet plate 2, with its side away from the fan fitting against the first filter screen 5 to better collect the powder coating that falls from the first filter screen 5. The baffle plate 8 is installed at an angle upwards towards the first filter screen 5 along the fan direction to prevent airflow from blowing up the powder coating that has already fallen into the first powder collection box 7.

[0048] The bottom of the inner cavity of the filter box 1, located between the fan and the first filter screen 5, is provided with a mounting hole whose size matches that of the first powder collection box 7. The first powder collection box 7 is detachably and fixedly installed in the mounting hole. The length and width of the mounting hole are equal to the length and width of the first powder collection box 7, respectively. When the first powder collection box 7 is inserted into the mounting hole, its four sides fit tightly against the edge of the mounting hole. This facilitates the installation and removal of the first powder collection box 7 and prevents airflow from escaping between the first powder collection box 7 and the mounting hole.

[0049] As a preferred technical solution, such as Figure 2 As shown, the powder coating device also includes multiple second filter screens 9. The second filter screens 9 have a certain degree of elasticity and can be stainless steel, nylon, or non-woven fabric.

[0050] Multiple second filter screens 9 are arranged in parallel at intervals and installed in the inner cavity of the filter box 1. The multiple second filter screens 9 are located between the first filter screen 5 and the air outlet 4.

[0051] The function of the second filter 9 is to further filter and refine the air that has been filtered by the first filter 5, thereby improving the filtration effect of the powder coating in the air.

[0052] like Figure 4 As shown, the powder spraying and filtering device also includes a second elastic component 10 and a second powder collection box 11.

[0053] The second elastic component 10 is installed between multiple second filter screens 9, and both ends of the second elastic component 10 are fixedly connected to two adjacent second filter screens 9 respectively. The second elastic component 10 is preferably a helical spring. The second powder collection box 11 is installed on the filter box 1 and located directly below the second filter screens 9; wherein the upper inlet 12 of the second powder collection box 11 communicates with the inner cavity of the filter box 1.

[0054] Because the airflow after passing through the air inlet plate 2 is prone to turbulence, the airflow blowing towards the second filter screen 9 after passing through the first filter screen 5 is also prone to turbulence, causing the second filter screen 9 to vibrate. The function of the second elastic component 10 is to further enhance the vibration of the second filter screen 9 to shake off the powder coating adhering to it.

[0055] Preferably, the second powder collection box 11 includes a plurality of inlets 12, each second filter screen 9 corresponding to one inlet 12, and the inlet 12 is funnel-shaped.

[0056] Multiple funnel-shaped inlets 12 are provided to facilitate the powder coating falling from the second filter screen 9 into the second powder collection box 11 under its own gravity, and to prevent the airflow from blowing up the powder coating that has already fallen into the second powder collection box 11.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A powder coating filtering device, comprising a filtering box, a fan and a first filter screen, the filtering box is provided with an air inlet and an air outlet, the fan is fixedly installed in the air inlet, and the first filter screen is fixedly installed in the inner cavity of the filtering box, characterized in that, The powder coating filtration device further includes: An air inlet plate is fixedly installed in the inner cavity of the filter box and located between the fan and the first filter screen. It is provided with a main ventilation hole and at least one secondary ventilation hole with a diameter different from that of the main ventilation hole. At least one first elastic component, with its two ends fixedly connected to the first filter screen and the side wall of the filter box respectively, is used to cause the first filter screen to vibrate when the fan is working.

2. A powder coating filtration device as claimed in claim 1, wherein, The powder coating filtration device further includes: The first powder collection box is installed at the bottom of the first filter screen, and has a powder collection trough with a baffle plate on the side of the powder collection trough near the fan. The wind deflector is inclined upwards along the direction of the fan toward the first filter screen.

3. The powder coating filtration device as described in claim 2, characterized in that, The bottom of the inner cavity of the filter box located between the fan and the first filter screen is provided with a mounting hole of a size that matches the first powder collection box, and the first powder collection box is detachably fixedly installed in the mounting hole.

4. The powder coating filtration device as described in claim 1, characterized in that, The powder coating filtration device further includes: Multiple second filter screens are arranged in parallel at intervals and installed in the inner cavity of the filter box, with the multiple second filter screens located between the first filter screen and the air outlet.

5. A powder coating filtration device as described in claim 2, characterized in that, The powder coating filtration device further includes: The second elastic component is installed between multiple second filter screens, and both ends of the second elastic component are fixedly connected to two adjacent second filter screens respectively.

6. A powder coating filtration device as described in claim 5, characterized in that, The powder coating filtration device further includes: The second powder collection box is installed on the filter box and located directly below the second filter screen; The upper inlet of the second powder collection box is connected to the inner cavity of the filter box.

7. A powder coating filtration device as described in claim 6, characterized in that, The second powder collection box includes multiple inlets, with each second filter screen corresponding to one inlet, and the inlets are funnel-shaped.

8. A powder coating filtration device as described in claim 7, characterized in that, Both the first elastic component and the second elastic component are helical springs.

9. A powder coating filtration device as described in claim 8, characterized in that, The first filter screen is a stainless steel filter screen, a nylon filter screen, or a non-woven fabric filter screen.

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