Rotary roller type water curtain cabinet and operation method thereof

Abstract

The invention relates to the technical field of paint spraying waste gas treatment equipment, in particular to a rotary roller type water curtain cabinet which comprises a cabinet body internally provided with a cavity and provided with an opening in the front side, at least one row of paint mist treatment assemblies are arranged in the cavity, and each paint mist treatment assembly comprises a plurality of rollers arranged in the vertical direction and a driving part used for driving the rollers to rotate. Knurling structures are arranged on the surfaces of the rollers, and a gap is formed between every two upper and lower adjacent rollers which rotate in the same direction; the front side or the rear side of each roller is provided with tangent and attached water scraping plates, the water scraping plates are used for cleaning the surfaces of the rollers, the two sides of the front ends, facing the rollers, of the water scraping plates are fixedly connected with baffles, and the baffles are arranged in the circumferential direction of the surfaces of the rollers and attached to one another, so that the rollers, the water scraping plates and the baffles define a water storage tank. When the roller rotates, circulating water is taken out from the water storage tank, a layer of uniform water film is formed on the surface of the roller, paint mist is effectively intercepted and treated, turbulent flow is formed through rotation of the roller, rotational flow is generated in gaps, and the effect of actively capturing the paint mist is enhanced.

Description

Technical Field

[0001] This invention relates to the technical field of paint spraying exhaust gas treatment equipment, and in particular to a rotary drum type water curtain cabinet and its operation method. Background Technology

[0002] Water curtain cabinets, also known as paint spraying water curtain cabinets or environmental protection water curtain cabinets, are industrial environmental protection equipment used for the treatment of exhaust gas in paint spraying workshops. Their core function is to intercept and treat paint mist particles and harmful gases generated during the painting process, thereby purifying the workshop air and protecting the health of operators. They are environmental protection facilities worthy of promotion in the paint spraying industry.

[0003] Currently, the traditional water curtain cabinet used for treating paint spraying exhaust gas is a fixed flat panel structure. Water is evenly distributed onto the panel through a water tank at the top. The circulating water flows down the panel under gravity, forming a water curtain on the panel surface. When the paint spray gun is spraying paint on the workpiece, the paint mist that does not adhere to the workpiece surface will continue to move forward with the airflow, collide with the water film on the vertical panel surface, and be absorbed by the water film and carried into the water tank at the bottom, thus achieving the purpose of absorbing paint mist. For example, Chinese utility model patent: A water curtain cabinet (application number 202120292284.1).

[0004] However, in actual use, the water distribution channel above the wall panel usually uses overflow outlets with smaller gaps or water distribution pipes with smaller holes to distribute water to the wall panel. When the diameter of the overflow outlet or small hole is small, the water curtain formed is thinner, making the water curtain on the wall panel more uneven. It is also easy to be blocked by paint residue in the circulating water, causing large areas of interrupted flow and drying. At the same time, due to the flatness error of the wall panel and the surface tension of water, the water distribution will also be uneven, especially in the lower half of the wall panel, where branches are prone to convergence, causing the water curtain on the wall panel to be interrupted and dried. Therefore, the wall panel surface in the interrupted and dried area is not protected by a water curtain and is very easy to stick to paint mist, affecting the water curtain cabinet's treatment and absorption effect on the sprayed paint. Summary of the Invention

[0005] In view of this, one of the objectives of this application is to provide a rotating drum type water curtain cabinet to solve the technical problem that the water curtain formation in the existing water curtain cabinet is uneven, and the water curtain is prone to branching, gathering or drying out, which affects the treatment and absorption effect of paint spraying exhaust gas.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a rotating drum-type water curtain cabinet, comprising a cabinet body with an internal cavity and an open front side, wherein at least one row of paint mist treatment components is provided in the cavity, the paint mist treatment components include a plurality of drums arranged in a vertical direction and a driving component for driving the drums to rotate, the surface of the drums is provided with an embossed structure, a gap is provided between two adjacent drums and they rotate in the same direction; each drum is provided with a tangential and abutting squeegee on its front or rear side, the squeegee is used to clean the surface of the drum, and baffles are fixedly connected to the two sides of the squeegee facing the front end of the drum, the baffles are arranged circumferentially along the surface of the drum and abutting each other, so that the drum, squeegee and baffles enclose a water storage tank, and when the drum rotates, circulating water is brought out from the water storage tank and a uniform water film is formed on the surface of the drum.

[0007] Furthermore, a rotating spindle is provided at the center of both ends of the roller, which rotates through the cabinet. The rotating spindle at one end of the roller extends out of the cabinet and is connected to the drive unit.

[0008] Furthermore, the drive unit includes a control structure that is independently configured to cooperate with each roller. The control structure is fixedly connected to the extended end of the rotating spindle to adjust the rotational speed of the roller.

[0009] Furthermore, the wiper blade and the baffle are integrated into one piece, and the lower part of the wiper blade is provided with an arc-shaped ramp that fits circumferentially along the surface of the roller.

[0010] Furthermore, the upper and lower ends of the back of the squeegee are respectively provided with fixing blocks and reinforcing ribs that are connected to the cabinet, and the reinforcing ribs are set along the length of the squeegee and close to the slope.

[0011] Furthermore, it also includes a circulating water assembly located on one side of the cabinet. The circulating water assembly includes multiple water distribution pipes extending into the cavity. The outlets of the water distribution pipes are located above the water storage tank so that the circulating water in the water storage tank can be replenished and maintained.

[0012] Furthermore, the circulating water assembly also includes a water pump and an inlet pipe and an outlet pipe connected to both ends of the water pump. The inlet pipe is connected to a water storage tank located below the cavity, and the outlet pipe is connected to a distribution pipe.

[0013] Furthermore, a partition plate corresponding to the rear position of the roller is installed in the water storage tank, and the height of the partition plate is less than the liquid level height of the water storage tank.

[0014] Furthermore, it also includes an exhaust gas treatment component disposed above the cavity. The exhaust gas treatment component includes a first partition and a second partition that are spaced apart and parallel to each other. An exhaust gas passage is provided between the first partition and the second partition. The first partition is located behind the roller, and the second partition protrudes downward relative to the first partition. At least one air outlet is provided above the cabinet, and the air outlet is connected to the exhaust gas passage.

[0015] The second objective of this application is to provide a method for operating a rotating drum-type water curtain cabinet, comprising the following steps: Step 1: Turn on the circulating water component and the exhaust gas treatment component to keep the circulating water level in the water storage tank stable. Step 2: After the drive unit is started, it drives several rollers to rotate in the same direction, so that a water film that absorbs paint mist is formed on the surface of the rollers. A water curtain is formed in the gap between two adjacent rollers. The rotation of the rollers generates turbulence, and a strong vortex is generated in the gap, which actively pulls and captures the paint mist. The absorbed paint mist will be automatically separated from the rollers along with the water film and enter the water storage tank. Step 3: Remove the paint residue and other residues formed after the circulating water in the water tank has undergone sedimentation, oil separation and other treatments.

[0016] The advantages of the technical solution in this application compared with the prior art are: 1. This invention utilizes an embossed structure on the roller surface to generate friction and surface tension of water. Driven by a drive unit, the roller rotates, allowing it to carry circulating water from the water tank during its movement. This forms a uniform water film on the roller surface to absorb paint mist. The front of the roller facing the paint sprayer is the main working area of ​​the water film. As the water film rotates from top to bottom with the roller, the gravity of the water film combined with centrifugal force causes the water film and paint residue to be automatically thrown downwards or detached from the roller. The arrangement of several rollers in a row of paint mist treatment components in the vertical direction ensures the water film area for absorbing paint residue, effectively maintaining the absorption and treatment of paint mist by the water film.

[0017] 2. In the paint mist treatment assembly of the present invention, a gap is provided between two adjacent rollers, and the two adjacent rollers rotate in the same direction. During the paint mist treatment process, firstly, the paint mist particles carried in the paint exhaust gas have a certain kinetic energy. Some of the paint mist directly impacts the water film on the surface of the roller under the action of inertia and is absorbed. Then, the water film will generate significant turbulence on the surrounding airflow distribution as the roller rotates. Some of the paint mist undergoes dynamic changes and traction under the action of turbulence, making it easier to be absorbed by the water film. Furthermore, the water film tangentially falls off at the gap to form a water curtain. When the paint exhaust gas passes through the gap between two adjacent rollers, the water curtain can dynamically and actively capture the paint mist. Finally, since the two rollers rotate in the same direction, the gap forms a structure with opposite directions, and a strong vortex is formed at the gap, further improving the active capture and absorption effect of paint mist.

[0018] 3. The formation of the water film in this invention mainly relies on the rotation of the roller itself, which makes it less likely to encounter size problems involving the overflow outlet or water distribution hole, thus preventing blockage and drying. At the same time, the roller is also tangentially fitted with a scraper. With each rotation of the roller, the scraper will actively clean the water stains and residues remaining on the roller surface, which can prevent paint residue from sticking and further prevent the phenomenon of drying. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only part of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a perspective view of an overall structure of the water curtain cabinet of the present invention; Figure 2 This is a cross-sectional view of an overall structure of the water curtain cabinet of the present invention; Figure 3 This is a schematic diagram of the roller, wiper blade and baffle from one perspective in this invention; Figure 4 This is a schematic diagram of the roller, wiper blade and baffle from another perspective in this invention; Figure 5 This is a cross-sectional view of the water film formed by the combination of the roller, the scraper, and the baffle in this invention; Figure 6 This is a cross-sectional view of another overall structure of the water curtain cabinet of the present invention; Figure 7 This is a flowchart of the water curtain cabinet operation method of the present invention.

[0021] Explanation of icon numbers: 1-Cabinet body, 11-Cavity, 12-Opening; 2-Paint mist treatment component, 21-Roller, 211-Rotating spindle, 22-Scraper, 221-Slide slope, 222-Fixing block, 223-Reinforcing rib strip, 23-Baffle, 24-Water storage tank, 25-Gap; 3-Circulating water assembly, 31-Water pump, 32-Inlet pipe, 33-Outlet pipe, 34-Diverter pipe; 4-Water storage tank, 41-Isolation plate; 5-Exhaust gas treatment component, 51-First baffle, 52-Second baffle, 53-Exhaust gas passage, 54-Air outlet; 6-Water film. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] Throughout this specification, the terms "comprising," "having," etc., are used to specify the presence of the stated features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. Technical terms such as "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary / secondary relationship of the indicated technical features.

[0024] In conventional water curtain cabinets, because paint and water are incompatible, paint mist usually only stays on the surface of the water curtain and cannot adhere to the wall panel. Due to the flatness error of the wall panel, the water distribution is uneven. In particular, due to the surface tension of water, the lower half of the vertical panel is prone to branching and gathering, causing the water curtain on the wall panel to stop and dry. The metal wall panel surface in the area of ​​water stoppage and drying is not protected by the water curtain, and it is very easy for paint mist to stick to it and continue to expand. In the water distribution trough above the wall panel, smaller overflow outlets or small-hole water distribution pipes are usually used to distribute water to the wall panel. When the diameter of the overflow outlet or small hole is small, the water curtain formed is thinner, but the unevenness of the water curtain on the wall panel is more obvious. Moreover, the smaller overflow outlet or small hole is easily blocked by paint residue in the circulating water, causing large-area water stoppage.

[0025] In order to achieve uniform water distribution and ensure a good water curtain effect, the method of increasing the circulation volume and forming a thicker water curtain is usually adopted in practice. The increase in circulation volume will lead to the need for larger circulating water tank volume and filtration and sedimentation facilities, resulting in larger system investment costs, operating costs and land area, and poor economic efficiency.

[0026] Furthermore, in the structure of a fixed flat panel water curtain cabinet, the water curtain moves downward along the wall panel only by gravity, resulting in a low flow velocity. The movement of paint mist is usually accompanied by compressed air, which easily forms an airflow boundary layer of a certain thickness on the air side in contact with the water curtain. Coarse paint mist particles can penetrate the airflow boundary layer well under inertia and thus come into contact with the water curtain. However, fine paint mist particles have less inertia and are less likely to penetrate the airflow boundary layer, resulting in a low absorption efficiency of paint mist by the water curtain cabinet.

[0027] Therefore, in order to solve the aforementioned problems of traditional water curtain cabinets, the inventors proposed a rotating drum type water curtain cabinet for treating paint spraying exhaust gas. Example 1

[0028] like Figures 1 to 5As shown, a rotating drum-type water curtain cabinet includes a cabinet body 1 with an internal cavity 11 and a front opening 12. The cavity 11 contains at least one row of paint mist treatment components 2. The paint mist treatment components 2 include several drums 21 arranged vertically and a drive component (not shown) for driving the drums 12 to rotate. The surface of the drums 21 is provided with an embossed structure. A gap 25 is provided between two adjacent drums 21 and they rotate in the same direction. Each drum 21 has a tangential and fitted squeegee 22 on its front or rear side. The squeegee 22 is used to clean the surface of the drum 21. Baffles 23 are fixedly connected to both sides of the squeegee 22 facing the front end of the drum 21. The baffles 23 are arranged circumferentially along the surface of the drum 21 and fit together so that the drum 21, the squeegee 22 and the baffles 23 enclose a water storage tank 24. When the drum 21 rotates, it carries out circulating water from the water storage tank 24 and forms a uniform water film 6 on the surface of the drum 21.

[0029] Through the above scheme, the roller 21 is designed with an embossed structure to generate friction and surface tension of water. Driven by the drive unit, the roller 21 rotates, allowing it to carry circulating water from the water storage tank 24. This forms a uniform water film 6 on the surface of the roller 21 to absorb paint mist. The front of the roller 21 facing the opening 12 for painting is the main working area for the water film 6 to absorb paint mist. That is, the upper top to the lower bottom of the roller 21 is the main working surface of the water film 6. When the water film 6 rotates from top to bottom with the roller 21, the centrifugal force under the gravity of the water film 6 reaches its maximum value, causing the water film 6 and paint residue to automatically move downward with the roller 21. Separation or detachment occurs when several rollers 21 in a row of paint mist treatment components 2 are arranged vertically to ensure the area of ​​the water film 6 for absorbing paint residue, effectively maintaining the absorption and treatment of paint mist by the water film 6. Furthermore, the formation of the water film 6 mainly depends on the rotational movement of the rollers 21 themselves, making it less likely to encounter size issues involving overflow outlets or water distribution holes, thus preventing blockages and subsequent drying. At the same time, the rollers are also tangentially fitted with scrapers 22. With each rotation of the rollers 21, the scrapers 22 actively clean the water stains and residues remaining on the surface of the rollers 21, preventing paint residue from sticking and further preventing the phenomenon of drying.

[0030] The working principle of spray painting treatment: Since the paint mist particles carried in the spray painting exhaust have their own kinetic energy, some of the paint mist is directly absorbed by impacting the water film 6 on the surface of the roller 21 under the action of inertia. Then, as the roller 21 rotates, it will generate significant turbulence in the surrounding airflow distribution. Some of the paint mist undergoes dynamic changes and traction under the action of turbulence, making it easier to be absorbed by the water film 6. Furthermore, the water film 6 of the roller 21 above the gap 25 will tangentially fall off to form a water curtain. When the spray painting exhaust passes through the gap 25 between two adjacent rollers 21, the flow of the water curtain can dynamically and actively capture the paint mist, improving the absorption effect of the paint mist. Finally, since the upper and lower rollers 21 rotate in the same direction, they form a structure with opposite directions at the gap 25, which will form a strong vortex at the gap 25. This generates a rotating airflow with strong suction, causing the paint mist to be drawn and impact the water curtain, further improving the active capture and absorption effect of the paint mist.

[0031] In addition, such as Figure 1 As shown, the embossed structure on the surface of roller 21 is a pattern, which can improve the surface roughness of roller 21. Under the influence of the rotation of roller 21, the airflow and turbulence effect inside the water curtain cabinet are better, which is conducive to improving the absorption rate of paint mist. The water film 6 rotates under the drive of roller 21, making the relative velocity of the water film 6 and the airflow carrying paint mist higher, the air-side airflow boundary layer thinner, and fine paint mist particles easier to penetrate and be captured. The turbulence generated by roller 21 can also pull some larger paint mist particles. At the same time, if larger paint mist particles fall rapidly under the action of inertia and turbulence, the flow will be smoother. The swirling flow at gap 25 can also effectively intercept and pull, and with the arrangement of rollers 21, several gaps 25 can be formed from top to bottom, effectively ensuring the thorough treatment of paint mist; at the same time, since the formation of water film 6 relies on the rotational movement of rollers 21, water film 6 can maintain a relatively uniform thickness, ensuring a good water film 6 effect. Therefore, in actual operation, the circulating water volume to achieve uniform water film 6 does not need to be too large, which means that the supporting cabinet 1 and other facilities can be selected to be a smaller model, reducing system investment and operating costs, reducing the footprint, and making it more economical.

[0032] like Figure 2 and Figure 5As shown, in this embodiment, a row of paint mist treatment components 2 is provided in the cavity 11, and each row of paint mist treatment components 2 is provided with several rollers 21 arranged in the vertical direction, such as 2, 3, 4, etc. Those skilled in the art can choose according to actual needs. In this embodiment, it is preferred that there are 4 rollers 21 distributed in the same straight line in the vertical direction. Similarly, the size of the gap 25 between two adjacent rollers 21 can also be designed according to actual production needs, such as 3cm, 5cm, 7cm, etc., which are not specifically limited here. It is worth noting that not only the number of rollers 21, but also the length and diameter of the rollers 21 can affect the absorption area of ​​the water film 6, and will also indirectly affect the size of the gap 25. Therefore, in practical applications, it is necessary to select the number and size of rollers 21 according to the amount of paint mist exhaust gas and adapt them to the model of the cabinet 1 and other facilities mentioned above.

[0033] like Figure 1 and Figure 3 As shown, in one specific embodiment of the improvement, a rotating spindle 211 is provided at the center of both ends of the roller 21, rotating through the cabinet body. The rotating spindle 211 at one end of the roller 21 extends out of the cabinet body 1 and is connected to the driving component. Specifically, the rotating spindle 211 is cylindrical, and the rotating spindle 211 and the roller 21 are an integral structure to ensure the strength of the structure. The rotating spindle 211 and the cabinet body 1 are rotatably connected through bearings and other structures. After the rotating spindle 211 extends out of the cabinet body 1, it is connected to the driving component, thereby realizing the rotation of the roller 21.

[0034] like Figure 1As shown, in one specific embodiment of the improvement, the driving component includes a control structure (not shown) that is independently configured to cooperate with each roller 21. The control structure is fixedly connected to the extended end of the rotating spindle 211 to adjust the rotational speed of the roller 21. Specifically, the control structure can consist of a variable frequency motor and a reducer, or each rotating spindle 211 can be connected to a set of motor drive devices via a belt, sprocket, and gear assembly, or it can be a set of independent motor reducers. In actual operation, since each extended rotating spindle 211 is connected to an independently driven control structure, and the water curtain cabinet is also equipped with an operation panel, the rotational speed and other parameters can be set through the operation panel when the control structure drives the rotating spindle 211 to rotate, thereby realizing the control of the rotational speed of the roller 21. In this embodiment, the rotational directions of two adjacent rollers 21 are designed to be the same, and at the gap 25, the upper roller 21 rotates inward and the lower roller 21 rotates outward. Therefore, strong turbulence and vortex can be generated at the gap 25, thereby improving the active control of paint mist. The water film 6 is formed by the rotation of the roller 21. When the rotation speed of the roller 21 is adjusted, the thickness of the water film 6 can also be adjusted and a specific uniformity can be maintained. It is worth noting that the adjustment of the rotation speed of the roller 21 can also control the disturbance and traction effect brought by the airflow around the roller 21, as well as the vortex generated at the gap 25. It can adapt to the absorption of paint mist under different conditions and enhance the adaptability of the water curtain cabinet. Of course, according to this application, several rollers 21 are designed to rotate clockwise toward the opening 12. The rotation of the roller 21 forms a downward turbulence. Under the action of turbulence and inertia, some of the paint mist on the periphery directly impacts the circulating water in the water storage tank 4 from top to bottom and is absorbed, further improving the efficiency of paint mist treatment and absorption. Increasing the rotation speed of the roller 21 can also enhance the downward traction effect of the paint mist.

[0035] like Figure 4 As shown, in one specific embodiment of the improvement, the wiper blade 22 and the baffle 23 are an integral structure. An arc-shaped ramp 221 is provided at the outer bottom of the wiper blade 22, and the ramp 221 is circumferentially fitted along the surface of the roller 21. Specifically, the wiper blade 22 and the roller 21 are tangentially fitted, allowing the wiper blade 22 to clean residual water stains and debris from the surface of the roller 21. Both the wiper blade 22 and the baffle 23 are made of materials such as nylon and polytetrafluoroethylene, giving them good wear resistance, preventing paint residue from adhering, and facilitating daily cleaning and maintenance. The wiper blade 22 is a vertically oriented rectangle, with the ramp 221 located at the bottom end of the wiper blade 22 facing away from the roller 21. This allows the bottom of the wiper blade 22 to adhere to the surface of the roller 21, forming a gradually increasing thickness wiper blade, improving cleaning effect and efficiency, and preventing residue from adhering to the wiper blade 22. This allows for the rapid and thorough removal of residual water stains and debris from the surface of the roller 21.

[0036] like Figure 4As shown, in one specific embodiment of the improvement, the upper and lower ends of the back of the scraper 22 are respectively provided with a fixing block 222 and a reinforcing rib strip 223 connected to the cabinet 1. The reinforcing rib strip 223 is set along the length of the scraper 22 and close to the slide 221. Specifically, the reinforcing rib strip 223 and the fixing block 222 are integral with the scraper 22. The two ends of the fixing block 222 and the reinforcing rib strip 223 are respectively connected to the side wall of the cabinet 1. The bottom edge of the reinforcing rib strip 223 is flush with the upper edge of the slide 221, so that when the roller 21 rotates, the water stains and residue scraped off by the scraper 22 flow out along the slide 221 and are blocked by the fixing block 222, thus falling into the water storage tank 4, effectively preventing water stains and residue from splashing in the cavity 11.

[0037] like Figure 1 As shown, as a specific embodiment of the improvement, the water curtain cabinet also includes a circulating water assembly 3 disposed on one side of the cabinet body 1. The circulating water assembly 3 includes multiple water distribution pipes 34 extending into the cavity 11, a water pump 31, and an inlet pipe 32 and an outlet pipe 33 connected to both ends of the water pump 31. The outlet pipe 33 is connected to the water distribution pipes 34. The outlet of the water distribution pipes 34 is disposed above the water storage tank 24 so that the circulating water in the water storage tank 24 can be replenished and maintained. The inlet pipe 32 is connected to a water storage tank 4 disposed below the cavity 11. Specifically, the inlet of the water inlet pipe 32 is located at the upper end of the side wall of the water storage tank 4. The number of water distribution pipes 34 corresponds to the number of rollers 21. In this embodiment, there are 4 water distribution pipes 34. The circulating water in the water storage tank 4 enters through the water inlet pipe 32 and is pumped into the outlet pipe 33 by the water pump 31. The outlet pipe 33 then sends the circulating water into the water distribution pipes 34. The water distribution pipes 34 inject the circulating water into the water storage tank 24. The rollers 21 carry the circulating water out of the water storage tank 24 and form a water film 6 to absorb paint mist. Then, the water enters the water storage tank 4 again, forming a water resource system that can be recycled and reused in the cabinet 1. During the rotation speed control of the rollers 21, the flow rate and velocity of the circulating water are also adjusted by the water pump 31 to maintain a specific liquid level in the water storage tank 24, avoid waste of water resources, and ensure the formation and thickness change of the water film 6.

[0038] like Figure 1 and Figure 2As shown, in one specific embodiment of the improvement, a baffle plate 41 is installed in the water storage tank 4, corresponding to the position behind the roller 21. The height of the baffle plate 41 is less than the liquid level of the water storage tank 4. Specifically, the baffle plate 41 is vertically installed, dividing the water storage tank 4 into a front tank and a rear tank. The paint mist treatment component 2 is located above the front tank. The height of the baffle plate 41 is less than the front and rear side walls of the water storage tank 4, while the total liquid level of the circulating water in the water storage tank 4 is higher than the baffle plate 41. This ensures the flow of circulating water between the front and rear tanks. The circulating water level in the front tank is close to the lowest roller 21. The rear tank is located below the exhaust gas channel 53 and extends backward. The inlet pipe 32 is connected to the rear tank. Therefore, after the water film 6 absorbs the paint mist, the separated circulating water and paint residue enter the front tank, and the particulate matter settles to the bottom. The baffle plate 41 can block this, preventing paint residue and other particulate matter from settling and entering the rear tank, thus avoiding blockage of the inlet pipe 32. The spacing of the partition plate 41 allows circulating water to flow only in the upper part of the partition plate 41. In some embodiments, the upper part of the partition plate 41 can be designed with evenly distributed through holes to ensure the circulation efficiency of the circulating water in the front pool and the rear pool, and to avoid the inability to circulate when the circulating water level in the water storage tank 4 is low. It can also provide a reference for replenishing the circulating water. For example, if the circulating water level is lower than the height of the partition plate 41, it needs to be replenished. Of course, in actual use, an adsorbent filter material can be added to the front pool of the water storage tank 4 to enhance the filtration and purification of the used circulating water, ensure that the particles quickly settle at the bottom of the front pool and are removed, and ensure that the water pump 31 can achieve the purpose of secondary recycling.

[0039] like Figure 1 and Figure 2As shown, in one specific embodiment of the improvement, the water curtain cabinet also includes an exhaust gas treatment component 5 disposed above the cavity 11. The exhaust gas treatment component 5 includes a first partition 51 and a second partition 52 that are spaced apart and parallel to each other. An exhaust gas channel 53 is provided between the first partition 51 and the second partition 52. The first partition 51 is located behind the roller 21, and the second partition 52 protrudes downward relative to the roller 21 and extends into the water storage tank 4. Specifically, the first partition 51 is positioned directly above the partition 41, with a gap between them to ensure the flow of paint fumes that cannot be absorbed by the circulating water and water film 6. The second partition 52 is located behind the first partition 51 and forms the rear wall of the cabinet 1. The rear wall of the water storage tank 4 extends further back relative to the second partition 52, creating a gap in the upper rear part of the rear pool of the water storage tank 4 relative to the second partition 52. This allows for observation of the filtration and usage of the circulating water and provides a water inlet for timely replenishment when the water level drops. The second partition 52 extends downwards into the circulating water within the water storage tank 4, thus dividing the rear pool of the water storage tank 4 into two parts. The inlet pipe 32 connects to the rear pool at the rear end. Partially, the first partition 51, circulating water, and second partition 52 work together to form a closed space connecting the cavity 11, that is, the exhaust gas channel 53 is connected to the cavity 11, ensuring that the exhaust gas flows out through the exhaust gas channel 53 between the first partition 51 and the second partition 52. At the same time, since the height of the partition 41 is lower than the liquid level of the circulating water, the second partition 52 extends into the circulating water, and the paint mist forms particulate sediment in the forepool of the water storage tank 4. Among them, floating objects such as oil are isolated by the second partition 52, further enhancing the filtration effect of the circulating water and ensuring the recycling of water resources. This allows the paint mist exhaust gas that cannot be absorbed by the water film 6 to enter the exhaust gas channel 53 under the obstruction of the second partition 52 and the circulating water, enhancing the effect of the water curtain cabinet in treating paint mist.

[0040] like Figure 1 and Figure 2As shown, in one specific embodiment of the improvement, at least one air outlet 54 is provided on the top of the cabinet 1, and the air outlet 54 is connected to the exhaust gas passage 53. Specifically, two air outlets 54 are provided on the top of the cabinet 1, each air outlet 54 is equipped with an exhaust fan for extracting exhaust gas, and the air outlet 54 is connected to a facility for treating exhaust gas, thereby achieving the absorption and filtration of paint mist exhaust gas that cannot be absorbed by the water film 6, further enhancing the cleaning and treatment effect of paint mist. It is worth noting that the first partition 51 is directly above the partition 41 and there is a gap between the two, so that the exhaust gas passage 53 is connected to the lower part of the cavity 11 of the cabinet 1. The paint mist exhaust gas is pulled by the rotation of the roller 21. The air flows downwards, and the cavity 11 connects to the opening 12. Under the action of the exhaust fan, the airflow is ensured and the paint mist exhaust gas is prevented from overflowing. Since the upper and lower rollers 21 rotate in opposite directions at the gap 25, a strong turbulence is formed at the gap 25, which makes the relative velocity of the compressed air flow at the gap 25 higher. This further prevents the paint mist exhaust gas from spreading outwards until it enters the upper part of the water storage tank 4 and is extracted from the exhaust gas channel 53 under the action of the exhaust fan, ensuring the treatment effect and efficiency of the paint mist.

[0041] Workflow: First, the circulating water assembly 3, exhaust gas treatment assembly 5, and drive components are activated, causing the drum 21 to rotate. The circulating water in the water storage tank 24 is maintained at a certain level with the replenishment of the water distribution pipe 34. As the drum 21 rotates continuously, a uniform water film 6 is formed on the surface of the drum 21. At this time, the paint spraying exhaust gas diffuses into the cavity 11. When it passes through the water film 6 area on the surface of the drum 21, it directly impacts the water film 6 and water curtain on the surface of the drum 21. The absorbed paint mist will be automatically separated from the drum 21 along with the water film 6 and enter the water storage tank 4. The paint mist exhaust gas that cannot be dissolved in water will enter the exhaust gas channel 53 for filtration. Finally, the paint residue formed in the water storage tank 4 after treatment such as circulating water sedimentation and oil separation is scooped out, effectively intercepting and treating the paint spraying exhaust gas generated during the painting process and protecting the health of the operators. Example 2

[0042] like Figure 6 As shown, unlike Embodiment 1, in this embodiment, the paint mist treatment components 2 in the cavity 11 are arranged in two rows and arranged side by side, with a gap between the two rows of paint mist treatment components 2. This allows the paint mist exhaust gas to be absorbed by the water film 6 and water curtain formed on the surface of the roller 21 in the front and rear rows of paint mist treatment components 2, increasing the absorption area of ​​the water film 6 and further enhancing the treatment effect of the paint mist exhaust gas. Of course, in some embodiments, after the two rows of paint mist treatment components 2 are arranged side by side, the front row moves upward and the rear row moves downward, so that the area of ​​part of the water film 6 overlaps front and back, that is, a strong suction zone is formed in the center directly facing the area where the painting is being done. At the same time, the upper and lower absorption areas are also increased to accommodate larger or stronger painting volumes.

[0043] The other structures are the same as in Example 1, and will not be described in detail here. Example 3

[0044] like Figure 7 As shown, an operating method for a rotary drum type water curtain cabinet, as described above, includes the following steps: Step 1: The circulating water component 3 and the exhaust gas treatment component 5 are turned on to ensure that the circulating water level in the water storage tank 24 remains stable. Step 2: After the drive unit is started, it drives the four rollers 21 in a row of paint mist treatment components 2 to rotate in the same direction, so that a water film 6 that absorbs paint mist is formed on the surface of the rollers 21. At this time, the workers can carry out painting work in the cavity 11. A water curtain is formed at the gap 25 between two adjacent rollers 21. The rotation of the rollers 21 generates turbulence, and a strong vortex is generated at the gap 25, which actively pulls and captures the diffused paint mist. The absorbed paint mist will be automatically separated from the rollers 21 along with the water film 6 and enter the water storage tank 4. Step 3: Remove the paint residue formed after the circulating water in the water storage tank 4 has undergone sedimentation, oil separation and other treatments to ensure the quality of the circulating water. After a period of use, observe the circulating water in the water storage tank 4. If it is low, replenish it to the specified level.

[0045] The water curtain cabinet of the present invention has a simple structure, strong adaptability, better paint mist treatment effect and efficiency, and is more conducive to operators to observe the circulating water at all times.

[0046] Finally, it should be noted that the above description is only an implementation method of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A rotating drum type water curtain cabinet, comprising a cabinet body with an internal cavity and an opening on the front, characterized in that, The cavity is provided with at least one row of paint mist treatment components. The paint mist treatment components include several rollers arranged in the vertical direction and a drive component for driving the rollers to rotate. The surface of the rollers is provided with an embossed structure. There is a gap between two adjacent rollers and they rotate in the same direction. Each of the rollers is provided with a tangential and fitted squeegee on its front or rear side. The squeegee is used to clean the surface of the roller. Baffles are fixedly connected to the two sides of the squeegee facing the front end of the roller. The baffles are arranged circumferentially along the surface of the roller and fit together so that the roller, the squeegee and the baffles together form a water storage tank. When the roller rotates, it carries out circulating water from the water storage tank and forms a uniform water film on the surface of the roller.

2. The rotating drum type water curtain cabinet according to claim 1, characterized in that, The roller has a rotating spindle at both ends that rotates through the cabinet. The rotating spindle at one end extends out of the cabinet and is connected to the drive unit.

3. A rotating drum type water curtain cabinet according to claim 2, characterized in that, The drive unit includes an adjustment structure that is independently configured to cooperate with each of the rollers. The adjustment structure is fixedly connected to the extended end of the rotating spindle to adjust the rotational speed of the rollers.

4. A rotating drum type water curtain cabinet according to claim 1, characterized in that, The wiper blade and the baffle are an integral structure. The lower part of the wiper blade is provided with an arc-shaped ramp, which is circumferentially fitted along the surface of the roller.

5. A rotating drum type water curtain cabinet according to claim 4, characterized in that, The upper and lower ends of the back of the squeegee are respectively provided with fixing blocks and reinforcing ribs that are connected to the cabinet body. The reinforcing ribs are arranged along the length of the squeegee and close to the landslide.

6. A rotating drum type water curtain cabinet according to claim 1, characterized in that, It also includes a circulating water assembly disposed on one side of the cabinet, the circulating water assembly including multiple water distribution pipes extending into the cavity, the outlet of the water distribution pipes being disposed above the water storage tank, so that the circulating water in the water storage tank can be replenished and maintained.

7. A rotating drum type water curtain cabinet according to claim 6, characterized in that, The circulating water assembly also includes a water pump and an inlet pipe and an outlet pipe connected to both ends of the water pump. The inlet pipe is connected to a water storage tank located below the cavity, and the outlet pipe is connected to the water distribution pipe.

8. A rotating drum type water curtain cabinet according to claim 7, characterized in that, The water storage tank is equipped with an isolation plate corresponding to the position behind the roller, and the height of the isolation plate is less than the liquid level height of the water storage tank.

9. A rotating drum type water curtain cabinet according to claim 1, characterized in that, It also includes an exhaust gas treatment assembly disposed above the cavity. The exhaust gas treatment assembly includes a first partition and a second partition that are spaced apart and parallel to each other. An exhaust gas channel is provided between the first partition and the second partition. The first partition is located behind the roller, and the second partition protrudes downward relative to the first partition. At least one air outlet is provided above the cabinet, and the air outlet is connected to the exhaust gas channel.

10. A method for operating a rotary drum type water curtain cabinet according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Turn on the circulating water assembly and the waste gas treatment assembly to ensure that the circulating water level in the water storage tank remains stable. Step 2: After the drive unit is started, it drives several rollers to rotate in the same direction, so that a water film that absorbs paint mist is formed on the surface of the rollers, and a water curtain is formed at the gap between two adjacent rollers. The rotation of the rollers generates turbulence, and a strong vortex is generated at the gap, which actively pulls and captures the paint mist. The absorbed paint mist will automatically separate from the rollers along with the water film and enter the water storage tank. Step 3: Remove the paint residue formed after the circulating water in the reservoir has undergone sedimentation, oil separation and other treatments.

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