Air suction chamber at bottom of coating production line

Abstract

The utility model relates to a bottom air suction chamber for a coating production line. The bottom air suction chamber comprises a shell, a high-pressure box fixed at the upper end of the shell, a vortex plate mounted in the high-pressure box, a filter box mounted at the lower end of the vortex plate, an air inlet pipe fixed at the lower end of the high-pressure box and an exhaust mechanism fixed on the side surface of the air inlet pipe, vortex can be generated at the air inlet through the specially designed vortex plate, the pressure intensity is reduced, and the entrainment effect is enhanced. Meanwhile, the air suction chamber is matched with the high-pressure box, the high-pressure box can eject high-pressure jet flow, surrounding fluid can be continuously drawn into the jet flow under the entrainment action of the jet flow, and as the internal pressure of the jet flow is smaller than the external pressure, air tends to move inwards at the top end of the jet flow and at the position where air energy is insufficient, and is sucked into the air suction chamber; by means of the design, air flow on the surface of the vortex plate can be accelerated, coating attached to the surface of the vortex plate is reduced, and meanwhile the air suction efficiency of the device can be greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of industrial spraying, and in particular to a bottom suction chamber for a coating production line. Background Technology

[0002] Painting production lines are widely used in industrial production, including automobiles, machinery manufacturing, and furniture. The bottom suction chamber in these lines collects paint mist, dust, and exhaust gases generated during the painting process, ensuring a safe production environment and reducing pollution. Traditional bottom suction devices typically employ simple extraction structures, such as directly drawing air with a fan or using filters within ductwork. Traditional suction chambers rely on a single fan to generate negative pressure, resulting in uneven airflow distribution and poor paint mist collection in localized areas. This can easily lead to paint mist overflow, affecting product quality and the workshop environment. In existing devices, the vortex plates are mostly planar structures, which can easily create stagnant areas on the surface as airflow passes through, causing paint particles to adhere. This not only reduces suction efficiency but also requires frequent shutdowns for cleaning, increasing maintenance costs. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention aims to provide a bottom suction chamber for a coating production line, solving the problems present in the prior art. Through the synergistic design of a high-pressure box and a vortex plate, the high-pressure jet from the high-pressure box and the vortex effect generated by the vortex plate are superimposed, enhancing the suction effect, increasing airflow velocity and coverage, thereby efficiently collecting paint mist. A vortex generating plate with a 20° angle is set on the side of the vortex plate's air inlet, guiding the airflow to form a spiral vortex through a special angle, reducing surface stagnation areas and lowering the probability of paint adhesion. Utilizing the synergistic effect of the high-pressure jet and the vortex, the fan power is reduced under the same suction requirements, while the optimized guide plate structure reduces airflow resistance, further reducing energy consumption.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bottom suction chamber for a coating production line, comprising an outer shell, a high-pressure box fixed to the upper end of the outer shell, a vortex plate installed inside the high-pressure box, a filter box installed at the lower end of the vortex plate, an air inlet pipe fixed to the lower end of the high-pressure box, and an exhaust mechanism fixed to the side of the air inlet pipe.

[0007] Preferably, the vortex plate includes an air intake plate, on which air intake ports are evenly arranged, and vortex generating plates are arranged on the sides of the air intake ports.

[0008] Preferably, the angle between the vortex generator plate and the air intake plate is 20°.

[0009] Preferably, the lower end of the high-pressure box is connected to the air intake pipe, and the upper end is provided with a cover plate with a square opening.

[0010] Preferably, the exhaust mechanism includes an exhaust pipe fixed to the side of the housing and an exhaust fan fixed inside the exhaust pipe.

[0011] Preferably, the filter box has a handle on the side, an air inlet evenly distributed at the top, and an air outlet evenly distributed at the bottom.

[0012] Preferably, a guide plate is provided inside the outer shell, and a support plate is provided in the middle of the guide plate.

[0013] (III) Beneficial Effects

[0014] The purpose of this invention is to provide a bottom suction chamber for a coating production line. This device, through the coordinated design of a high-pressure box and a vortex plate, utilizes the superposition effect of high-pressure jet and spiral vortex to significantly improve paint mist collection efficiency, reduce paint adhesion on the surface of the vortex plate, and lower maintenance frequency. The high-pressure jet technology reduces fan energy consumption while ensuring suction power, achieving the goal of efficient, low-consumption, and environmentally friendly coating exhaust gas treatment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] Figure 2 This is a schematic diagram of the vortex plate in this utility model.

[0017] Figure 3 This is a schematic diagram of the high-voltage box in this utility model.

[0018] Figure 4 This is a schematic diagram of the exhaust mechanism in this utility model.

[0019] Figure 5 This is a top view of the filter box in this utility model.

[0020] Figure 6 This is a bottom view of the filter box in this utility model.

[0021] Figure 7 This is a schematic diagram of the interior of the outer shell of this utility model.

[0022] In the diagram: 1-outer shell, 101-guide plate, 102-support plate, 2-high pressure box, 201-cover plate, 202-square opening, 3-vortex plate, 301-inlet plate, 302-inlet, 303-vortex generating plate, 4-filter box, 401-handle, 402-air inlet, 403-air outlet, 5-inlet pipe, 6-exhaust mechanism, 601-exhaust pipe, 602-exhaust fan. Detailed Implementation

[0023] The following will refer to the appendix in the example of this utility model. Figure 1 - Appendix Figure 7 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1 As shown, this utility model provides a technical solution: a bottom suction chamber for a coating production line, including a shell 1, a high-pressure box 2 fixed to the upper end of the shell 1, a vortex plate 3 installed inside the high-pressure box 2, a filter box 4 installed at the lower end of the vortex plate 3, an air inlet pipe 5 fixed to the lower end of the high-pressure box 2, and an exhaust mechanism 6 fixed to the side of the air inlet pipe 5; the shell 1 serves as the main support structure of the device, accommodating and protecting the internal components, while also forming an airflow channel. The high-pressure box 2 is used to collect and contain the air entering from the air inlet pipe 5, and ejects the air from the square opening 202 to form a high-pressure jet. The air inlet pipe 5 is connected to an external high-pressure air source. After the external high-pressure air source enters the high-pressure box 2, it flows out from the square opening 202. Because the square opening 202 is long and narrow, the air will have a high flow velocity when it flows out, thus forming a high-pressure jet, which works in conjunction with the vortex plate 3 to enhance the entrainment effect and suck in paint mist. The vortex plate 301 has an anodized surface (Ra≤0.8μm), which reduces paint mist adhesion while ensuring high airflow efficiency. The filter box 4 has a built-in double-layer filtration structure: the first layer is a metal wire mesh (0.5mm pore size), and the second layer is a PTFE membrane filter media (0.3μm filtration accuracy). This technology is mature and will not be elaborated upon here. The filter box 4 is used to intercept paint mist particles and purify exhaust gas; its detachable design facilitates maintenance. The exhaust mechanism 6 uses the exhaust fan 602 to provide negative pressure and discharges the purified gas.

[0025] like Figure 2 As shown, the vortex plate 3 includes an air inlet plate 301, on which air inlets 302 are uniformly arranged, and vortex generating plates 303 are arranged on the sides of the air inlets 302. The air inlet plate 301 is used to install the vortex plate 3 inside the outer shell 1. The air inlets 302 serve as channels for airflow to enter the outer shell 1 and are uniformly distributed on the surface of the air inlet plate 301. They draw in air from above to form a stable negative pressure for the spraying operation area. The vortex generating plates 303 change the airflow direction by tilting at a 20° angle, forming a spiral vortex that creates a local low-pressure area around the air inlets 302, enhancing the entrainment effect and increasing the flow velocity of paint mist when entering the air inlets 302, thereby reducing paint adhesion.

[0026] like Figure 2As shown, the angle between the vortex generating plate 303 and the air intake plate 301 is 20°; in this device, after simulation optimization, this angle can make the airflow rotation intensity reach ω=200rad / s.

[0027] like Figure 3 As shown, the lower end of the high-pressure box 2 is connected to the air inlet pipe 5, and the upper end is equipped with a cover plate 201 with a square opening 202. The inner wall of the air inlet pipe 5 is coated with a Teflon coating (friction coefficient μ = 0.05), which greatly increases the maintenance-free cycle. The air inlet pipe 5 is connected to an external air source. After compressed air enters the high-pressure box 2, it is ejected from the square opening 202 on the cover plate 201, forming a high-pressure jet. This causes the surrounding air to gather upwards towards the device. The low-pressure environment attracts external air (including paint mist) to flow towards the high-pressure box 2, which superimposes with the vortex generated by the vortex plate 3, further improving the suction efficiency. The high-speed jet forms a negative pressure zone around it, quickly sucking paint mist, dust, and other pollutants from the bottom of the painting workshop into the device. The suction effect expands the airflow coverage area and enhances the ability to collect pollutants in local areas.

[0028] like Figure 4 As shown, the exhaust mechanism 6 includes an exhaust pipe 601 fixed to the side of the housing 1 and an exhaust fan 602 fixed inside the exhaust pipe 601. The exhaust pipe 601 is used to discharge filtered air, and the exhaust fan 602 generates a negative pressure environment inside the housing 1, thereby attracting the air above to pass through the filter box 4 for filtration, which is the source of the suction of the device.

[0029] like Figure 5 and Figure 6 As shown, the filter box 4 has a handle 401 on its side, an air inlet 402 evenly distributed at the top, and an air outlet 403 evenly distributed at the bottom. The handle 401 is used to easily replace the filter box 4. The drawn air enters the filter box 4 through the air inlet 402, and after being filtered by the filter box 4, it flows out through the air outlet 403.

[0030] like Figure 7 As shown, a guide plate 101 is provided inside the outer shell 1, and a support plate 102 is provided in the middle of the guide plate 101. The guide plate 101 is wider at the top and narrower at the bottom, with a higher flow velocity and lower pressure at the lower end, which allows the airflow to flow more smoothly through the filter box 4. The support plate 102 is used to support the filter box 4.

[0031] Working principle:

[0032] The high-pressure box 2 is connected to an external high-pressure air source via the air inlet pipe 5. After compressed air passes through the high-pressure box 2, it is ejected at high speed from the square opening 202 of the cover plate 201, forming a high-pressure jet. The entrainment effect of the jet draws surrounding air (including paint mist) into the jet area, creating a local negative pressure zone at the top of the device. At this time, the exhaust fan 602 starts, generating negative pressure at the lower end of the outer casing 1, drawing air from the upper end into the outer casing 1. When the airflow passes through the vortex plate 3, a vortex generating plate 303 with a 20° angle is set on the side of the air inlet 302 of the vortex plate 3, guiding the airflow to form a spiral vortex. The vortex strengthens the local low-pressure zone around the air inlet, accelerates airflow, increases suction efficiency, and reduces paint mist adhesion. The paint mist is then discharged from the exhaust pipe 601 after being filtered by the filter box 4.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottom suction chamber for a coating production line, characterized in that, It includes an outer shell (1), a high-pressure box (2) fixed to the upper end of the outer shell (1), a vortex plate (3) installed inside the high-pressure box (2), a filter box (4) installed at the lower end of the vortex plate (3), an air intake pipe (5) fixed to the lower end of the high-pressure box (2), and an exhaust mechanism (6) fixed to the side of the air intake pipe (5).

2. The bottom suction chamber of a coating production line according to claim 1, characterized in that, The vortex plate (3) includes an air intake plate (301), on which air intake ports (302) are uniformly arranged, and vortex generating plates (303) are arranged on the sides of the air intake ports (302).

3. The bottom suction chamber of a coating production line according to claim 2, characterized in that, The included angle between the vortex generator plate (303) and the air intake plate (301) is 20°.

4. The bottom suction chamber of a coating production line according to claim 1, characterized in that, The lower end of the high-pressure box (2) is connected to the air inlet pipe (5), and the upper end is provided with a cover plate (201), and the cover plate (201) is provided with a square opening (202).

5. The bottom suction chamber of a coating production line according to claim 1, characterized in that, The exhaust mechanism (6) includes an exhaust pipe (601) fixed to the side of the housing (1) and an exhaust fan (602) fixed inside the exhaust pipe (601).

6. The bottom suction chamber of a coating production line according to claim 1, characterized in that, The filter box (4) has a handle (401) on its side, an air inlet (402) evenly arranged at its upper end, and an air outlet (403) evenly arranged at its lower end.

7. The bottom suction chamber of a coating production line according to claim 1, characterized in that, The outer shell (1) is provided with a flow guide plate (101) inside, and a support plate (102) is provided in the middle of the flow guide plate (101).

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