Air-reducing and thickening spraying chamber for purifying spraying air

Abstract

The utility model relates to the technical field of paint spraying, in particular to an air-reducing and thickening spraying chamber for purifying spraying air. The paint spraying device comprises a fresh air inlet pipe, a paint spraying space connected and communicated with the fresh air pipe and a dilution space communicated with the paint spraying space, and further comprises an isolation baffle fixedly installed at the top of the paint spraying space and formed by connecting two baffles at an angle. One free end of the isolation baffle is vertically and fixedly connected with the top of the paint spraying space, the other free end of the isolation baffle obliquely extends downwards towards the dilution space to the position above the dilution space, and the vertical sectional area of the isolation baffle located above the dilution space and the vertical sectional area of the dilution space are gradually reduced from top to bottom. And therefore, the air speed entering the dilution space from the paint spraying space is gradually reduced. By arranging the isolation baffle, waste gas can enter the dilution space obliquely downwards along the isolation baffle, the air speed is reduced gradually, the concentration of the waste gas is increased, then the effects of reducing air and increasing concentration are achieved, and the waste gas purification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of painting, in particular to a reduced-air-increased-concentration spraying chamber for purifying spraying air. Background Art

[0002] Air spraying is one of the most commonly used methods, which atomizes the paint with compressed air for spraying. For parameters such as the paint spraying amount, paint beam shape, paint beam diameter, paint particle size, and air pressure, appropriate adjustments must be made according to the type and viscosity of the paint.

[0003] In modern industrial production, the spraying process is widely used in many fields such as automobile manufacturing, furniture manufacturing, and electronic product painting. However, a large amount of waste gas containing volatile organic compounds (VOCs), particulate matter, and other harmful substances will be generated during the spraying operation. These waste gases not only cause serious pollution to the environment but also endanger the health of the operators, leading to occupational diseases.

[0004] Traditional spraying chambers usually only have basic ventilation facilities, and the waste gas is directly discharged outdoors through a simple exhaust system. This method not only consumes a large amount of energy but also cannot effectively purify harmful substances, making it difficult to fully purify the waste gas. As a result, there will still be residual waste gas in the spraying chamber, which will pose a certain threat to the health of the workers working in the spraying chamber. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a reduced-air-increased-concentration spraying chamber for purifying spraying air, which solves the technical problem that when the existing spraying chamber treats waste gas, it cannot effectively purify harmful substances, making it difficult to fully purify the waste gas, resulting in residual waste gas in the spraying chamber, which will pose a certain threat to the health of the workers working in the spraying chamber.

[0007] (II) Technical Solutions

[0008] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0009] The utility model provides a spraying chamber with reduced air volume and increased concentration for purifying spraying air, which includes a fresh air inlet pipe, a painting space connected and communicated with the fresh air inlet pipe, and a dilution space communicated with the painting space. It also includes a broken-line-shaped isolation baffle formed by angled connection of two baffles and fixedly installed at the top of the painting space. One free end of the isolation baffle is vertically fixedly connected to the top of the painting space, and the other free end extends obliquely downward towards the dilution space to the upper part of the dilution space. The included angle end of the isolation baffle is located above the connection between the painting space and the dilution space, and the inner angle of the isolation baffle faces the inner wall of the top of the spraying chamber with reduced air volume and increased concentration. The vertical cross-sectional area of the isolation baffle above the dilution space gradually decreases from top to bottom, so that the wind speed entering the dilution space from the painting space gradually decreases.

[0010] Preferably, it further includes a plurality of spray gun assemblies and a plurality of workpieces. The plurality of workpieces are placed in parallel and at intervals on a workbench at the connection between the painting space and the dilution space. The plurality of spray gun assemblies are installed in the painting space and the plurality of spray gun assemblies correspond to the plurality of workpieces one by one for spraying the plurality of workpieces. A section of the isolation baffle above the plurality of workpieces is arc-shaped and the concave part of the arc faces the plurality of workpieces.

[0011] Preferably, a water tank, a liquid outlet pipe and a liquid inlet pipe are arranged in the dilution space. One end of the water tank far from the painting space is connected and communicated with the liquid outlet pipe, and one end of the water tank close to the painting space is communicated with the liquid inlet pipe through an inclined diversion platform, so that the waste gas entering the dilution space from the painting space enters the water tank for absorption and dilution.

[0012] Preferably, a liquid level sensor is installed in the water tank, and the liquid level sensor is located at the position of the water tank close to the liquid outlet pipe.

[0013] Preferably, the air volume reduction and concentration increase spraying chamber further includes a suction air space and a return air space; the suction air space and the return air space are arranged adjacent and parallel to each other and are both located above the dilution space and are both communicated with the dilution space. A suction device is fixedly installed at the top of the suction air space, the suction port of the suction device faces the suction air space, the air outlet of the suction device is respectively connected and communicated with an air outlet pipe and a return air pipe, the air outlet pipe is connected and communicated with the return air pipe, the end of the air outlet pipe away from the suction device is connected to the next purification device, and the end of the return air pipe away from the air outlet pipe is connected and communicated with the top of the return air space; a partition board is fixedly installed at the top of the connection between the suction air space and the return air space, and the bottom of the partition board extends above the dilution space and has a gap with the water surface of the water tank. The isolation baffle can separate the spraying space and the return air space, and there is a gap between the partition board and the isolation baffle.

[0014] Preferably, the suction device includes a primary fan and a secondary fan; the primary fan is located below the secondary fan, and the outer contour of the first fan blade in the primary fan is larger than the outer contour of the second fan blade in the secondary fan. The top of the secondary fan is connected and communicated with the air outlet pipe and the return air pipe; the suction directions of both the primary fan and the secondary fan face the suction air space.

[0015] Preferably, the inner diameter of the return air pipe is larger than the inner diameter of the air outlet pipe. The air volume of the waste gas that enters the return air pipe and is not dissolved in the solution in the water tank is 70%, and the air volume of the waste gas that enters the air outlet pipe and is not dissolved in the solution in the water tank is 30%.

[0016] Preferably, a mounting plate is fixedly installed above the water tank, and the mounting plate is inclined towards the partition board. A flow guide plate is fixedly installed at the bottom of the end of the mounting plate facing the partition board; the flow guide plate is of an arc structure, the upper part of the flow guide plate is placed above the water tank, the lower part of the flow guide plate extends into the water tank and is connected to the mounting block in the water tank. The concave part of the arc structure of the flow guide plate faces the inclined flow guide table, so that the waste gas that is not dissolved in the dilution space passes through the flow guide plate and is sucked into the suction air space by the suction device. The suction device sends part of the waste gas into the next purification device through the air outlet pipe, and the other part of the waste gas enters the return air space through the return air pipe, so that the waste gas enters the water tank for secondary dilution.

[0017] Preferably, a plurality of water baffle plates are fixedly installed on the side wall of the partition facing the air suction space and on the inner wall of one side of the air suction space relative to the partition. The plurality of water baffle plates are arranged staggeredly from top to bottom. The water baffle plates are of an arc-shaped structure, and the concave part of the arc-shaped structure faces the water tank.

[0018] Preferably, the bottom of the partition is Y-shaped, and the opening of the Y-shape faces the water tank. One end of the mounting plate facing the partition is located in the opening of the Y-shape and has a gap with the partition; an air-permeable louver is installed at one end of the Y-shape close to the water tank, so that the undiluted waste gas enters the air suction space from the air-permeable louver.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1. In a spray booth for purifying spray air and reducing wind and increasing concentration of the present utility model, by providing an isolation baffle, after the waste gas after spraying is mixed with air and impacts the isolation baffle, since the vertical cross-sectional area between the isolation baffle and the dilution space gradually decreases, therefore, the mixed waste gas is guided by the isolation baffle and obliquely enters the dilution space along the isolation baffle downward. At the same time, the wind speed gradually decreases, and the spraying space continues to spray paint, increasing the concentration of the waste gas, prolonging the residence time of the waste gas in the dilution space, so that most of the waste gas can be absorbed and diluted after entering the dilution space, thereby achieving the effect of reducing wind and increasing concentration, improving the efficiency of purifying waste gas, and improving the dilution efficiency of paint mist and other harmful substances in the waste gas. Moreover, it can effectively reduce the pollution concentration in the spraying space, reduce the risk of workers being exposed to harmful gas environments, improve the air quality of the workplace, and ensure the health and safety of operators.

[0022] 2. In a spray booth for purifying spray air and reducing wind and increasing concentration of the present utility model, by setting one section of the isolation baffle as an arc shape, it can achieve the accommodation of a plurality of spray gun assemblies. Since the spray gun assemblies need to spray paint on various surfaces of the workpiece, it can prevent the spray gun assemblies from interfering with the isolation baffle when spraying paint on the workpiece.

[0023] 3. The air-reducing and concentration-increasing spraying booth for purifying spraying air of the present utility model can, by setting a water tank, a liquid outlet pipe and a liquid inlet pipe, realize that after the mixed waste gas is guided by the isolation baffle and undergoes air reduction and concentration increase, most of the easily soluble waste gas enters the water tank to dissolve with the solution, thereby realizing the first-step purification of the mixed waste gas. The waste water after reacting with the waste gas is discharged through the liquid outlet pipe. By setting a water inlet and an inclined diversion platform, it can continuously inject the solution into the water tank, thereby realizing the continuity of waste gas purification. By setting a liquid level sensor in the water tank, it can monitor the liquid level height in the water tank in real time, ensuring that the water tank always maintains an appropriate amount of solution, neither overflowing due to being too full nor affecting the waste gas absorption efficiency due to too low a liquid level.

[0024] 4. The air-reducing and concentration-increasing spraying booth for purifying spraying air of the present utility model can, by setting a suction air space and a return air space and setting a suction device in the suction air space, suck up the waste gas that has not dissolved with the solution in the water tank through the suction device. Part of the waste gas enters the next purification device through the air outlet pipe for deep purification, and the other part of the waste gas enters the return air space through the return air pipe to further dissolve and purify with the solution in the water tank, realizing secondary dilution, improving the purification efficiency and reducing the waste of resources. By setting a partition to separate the suction air space and the return air space, it can realize the independent operation of the suction air space and the return air space, and can also maintain the air pressure balance in the air-reducing and concentration-increasing spraying booth.

[0025] 5. The air-reducing and concentration-increasing spraying booth for purifying spraying air of the present utility model can, by setting a primary fan and a secondary fan, suck up the waste gas that has not dissolved with the solution in the water tank and release it from the air outlet pipe and the return air pipe, improving the air suction efficiency. Moreover, by making the outer contour of the first fan blade in the primary fan larger than the outer contour of the second fan blade in the secondary fan, the primary fan can more effectively suck a large amount of mixed waste gas from the suction air space, providing an initial large air volume suction capacity. The secondary fan, through the design of the smaller second fan blade, further improves the waste gas extraction speed and pressure, realizing the efficient transmission of the waste gas to the air outlet pipe and the return air pipe and improving the working efficiency. By setting the inner diameter of the return air pipe to be larger than the inner diameter of the air outlet pipe, it can realize that most of the waste gas that has not dissolved with the solution in the water tank enters the return air space through the return air pipe for secondary dilution, thereby reducing energy consumption and improving the waste gas purification efficiency.

[0026] 6. The spray booth with reduced air volume and increased concentration for purifying spray air of the present utility model can effectively guide the waste gas that is not completely dissolved in the dilution space to the air suction device by setting the flow guide plate, improving the waste gas collection efficiency, reducing the residence time of the waste gas in the booth, lowering the concentration of harmful substances in the working environment, and enhancing the operation safety. When the waste gas that is not absorbed and diluted by the solution in the water tank passes through the flow guide plate, it can come into contact with the water surface again, realizing secondary dilution of the waste gas and further improving the purification efficiency. By setting multiple water baffle plates, and the multiple water baffle plates are staggered, they can effectively intercept and guide the water droplets evaporated from the water tank surface and sucked up or splashed by the air suction device with the waste gas to fall back into the water tank, preventing the water droplets from being sucked into the air suction device and avoiding damage to the fan caused by water droplet erosion, thus extending the service life of the equipment.

[0027] 7. The spray booth with reduced air volume and increased concentration for purifying spray air of the present utility model forms a specific air flow channel with the mounting plate by setting the partition plate in a Y shape, ensuring that the waste gas can flow more concentratedly and orderly when passing above the water tank. By setting the air passing louvers, they can jointly form a barrier with the partition plate and the mounting plate, and do not hinder the flow of the waste gas, preventing the water vapor and liquid droplets above the water tank from directly entering the air suction device, thereby realizing preliminary blocking of the water vapor and liquid droplets from entering the air suction device and further reducing the damage rate of the air suction device. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall indoor structure of the spray booth with reduced air volume and increased concentration for purifying spray air of the present utility model.

[0029]

Description of the Reference Numerals

[0030] 1: Fresh air inlet pipe; 2: Spray painting space; 21: Spray gun assembly; 22: Workpiece; 23: Workbench; 3: Dilution space; 31: Water tank; 32: Liquid outlet pipe; 33: Liquid inlet pipe; 34: Inclined flow guide platform; 35: Liquid level sensor; 36: Mounting plate; 37: Flow guide plate; 4: Air suction space; 41: Air suction device; 411: Primary fan; 4111: First fan blade; 412: Secondary fan; 4121: Second fan blade; 42: Air outlet pipe; 43: Water baffle plate; 5: Return air space; 51: Return air pipe; 6: Isolation baffle; 7: Partition plate; 71: Air passing louver. Detailed Embodiments

[0031] To better understand the above technical solution, the exemplary embodiments of the present utility model will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present utility model and to fully convey the scope of the present utility model to those skilled in the art.

[0032] Embodiment 1

[0033] As Figure 1 shown, a wind-reducing and concentration-increasing spraying chamber for purifying spraying air in this embodiment includes a fresh air inlet pipe 1, a spraying space 2 connected and communicated with the fresh air inlet pipe 1, and a dilution space 3 communicated with the spraying space 2. It also includes a broken-line-shaped isolation baffle 6 formed by angular connection of two baffles and fixedly installed at the top of the spraying space 2.

[0034] Specifically, one free end of the isolation baffle 6 is vertically and fixedly connected to the top of the spraying space 2, and the other free end extends obliquely downward towards the dilution space 3 to above the dilution space 3. The included angle end of the isolation baffle 6 is located above the connection between the spraying space 2 and the dilution space 3, that is, the shape of the isolation baffle 6 is ">". The inner angle of the isolation baffle 6 faces the inner wall of the top of the wind-reducing and concentration-increasing spraying chamber. The vertical cross-sectional area of the isolation baffle 6 located above the dilution space 3 gradually decreases from top to bottom, so that the wind speed of the waste gas entering the dilution space 3 from the spraying space 2 gradually decreases. By setting the isolation baffle 6, after the waste gas after spraying is mixed with air and hits the isolation baffle 6, since the vertical cross-sectional area of the isolation baffle 6 and the dilution space 3 gradually decreases, the mixed waste gas is guided by the isolation baffle 6 and enters the dilution space 3 obliquely downward along the isolation baffle 6. At the same time, the wind speed gradually decreases, and the spraying space 2 continues to spray paint, increasing the concentration of the waste gas, prolonging the residence time of the waste gas in the dilution space 3, so that most of the waste gas can be absorbed and diluted after entering the dilution space 3, thereby achieving the effect of wind reduction and concentration increase, improving the efficiency of purifying waste gas, and improving the dilution efficiency of paint mist and other harmful substances in the waste gas. And, it can also effectively reduce the pollution concentration in the spraying space 2, reduce the risk of workers being exposed to harmful gas environments, improve the air quality of the workplace, and ensure the health and safety of operators. Here, it should be noted that the air volume of the fresh air entering the spraying space 2 from the fresh air inlet pipe 1 is preferably 30%, so that the fresh air can continuously and fully mix with the waste gas after spraying. And, the preferred range of the wind speed of the mixed waste gas initially entering the dilution space 3 from the spraying space 2 is 0.8 m / s - 1.0 m / s.

[0035] Furthermore, the reduced-air-concentration spray chamber for purifying spray air in this embodiment further includes a plurality of spray gun assemblies 21 and a plurality of workpieces 22 .

[0036] Among them, multiple workpieces 22 are placed in parallel and at intervals on a workbench 23 at the connection between the spray painting space 2 and the dilution space 3, and multiple spray gun assemblies 21 are installed in the spray painting space 2 and the multiple spray gun assemblies 21 correspond to the multiple workpieces 22 one by one, so as to spray paint the multiple workpieces 22. A section of the isolation baffle 6 located above the multiple workpieces 22 is arc-shaped, and the arc-shaped inner concave portion faces the multiple workpieces 22, which can achieve the giving way of the multiple spray gun assemblies 21. Since the spray gun assembly 21 needs to spray paint on each surface of the workpiece 22, it can avoid the spray gun assembly 21 from interfering with the isolation baffle 6 when spraying paint on the workpiece 22.

[0037] Furthermore, a water tank 31 , a liquid outlet pipe 32 and a liquid inlet pipe 33 are provided in the dilution space 3 .

[0038] Specifically, the water tank 31 is installed on the bottom inner wall of the dilution space 3, and one end of the water tank 31 away from the paint spraying space 2 is connected and communicated with the liquid outlet pipe 32, and one end of the water tank 31 close to the paint spraying space 2 is communicated with the liquid inlet pipe 33 through the inclined guide platform 34, so that the exhaust gas entering the dilution space 3 from the paint spraying space 2 enters the water tank 31 for absorption and dilution. Among them, the specification of the liquid inlet pipe 33 is preferably a 2.5-inch water pipe. By setting the water tank 31, the liquid outlet pipe 32 and the liquid inlet pipe 33, it can be realized that after the mixed exhaust gas is guided by the isolation baffle 6 and the wind is reduced and concentrated, most of the easily soluble exhaust gas enters the water tank 31 and dissolves with the solution, thereby realizing the first step of purification of the mixed exhaust gas, and the wastewater after reaction with the exhaust gas is discharged through the liquid outlet pipe 32. By setting the water inlet and the inclined guide platform 34, it can inject the solution into the water tank 31 at all times, thereby realizing the continuity of purifying the exhaust gas. Preferably, a liquid level sensor 35 is installed in the water tank 31. The liquid level sensor 35 is located near the liquid outlet pipe 32 of the water tank 31. It can monitor the liquid level in the water tank 31 in real time to ensure that the water tank 31 always maintains an appropriate amount of solution, neither overflowing due to overfilling nor affecting the exhaust gas absorption efficiency due to too low a liquid level. The height between the angle end of the isolation baffle 6 and the top of the working platform is preferably 800 mm.

[0039] Furthermore, the reduced-air-concentration spray chamber also includes an air suction space 4 and an air return space 5 .

[0040] Specifically, the air suction space 4 and the air return space 5 are arranged adjacent to and parallel to each other, and are both located above the dilution space 3 and communicate with the dilution space 3. Moreover, the air suction space 4, the air return space 5, and the painting space 2 are parallel and adjacent to each other. The isolation baffle 6 can separate the painting space 2 and the air return space 5. At the top of the connection between the air suction space 4 and the air return space 5, a partition plate 7 is fixedly installed to separate the air suction space 4 and the air return space 5, so as to enable the independent operation of the air suction space 4 and the air return space 5, and also maintain the air pressure balance in the spraying chamber with reduced air volume and increased concentration. The bottom of the partition plate 7 extends above the dilution space 3 and has a gap with the water surface of the water tank 31. Also, there is a gap between the partition plate 7 and the isolation baffle 6.

[0041] At the top of the air suction space 4, an air suction device 41 is fixedly installed. The air suction port of the air suction device 41 faces the air suction space 4. The air outlet of the air suction device 41 is respectively connected and communicated with an air outlet pipe 42 and a return air pipe 51. The air outlet pipe 42 is connected and communicated with the return air pipe 51. The end of the air outlet pipe 42 far from the air suction device 41 is connected to the next purification device. The end of the return air pipe 51 far from the air outlet pipe 42 is connected and communicated with the top of the air return space 5. By setting the air suction device 41, it can suck the waste gas that has not dissolved in the solution in the water tank 31 through the air suction device 41. Part of the waste gas enters the next purification device through the air outlet pipe 42 for deep purification, and the other part of the waste gas enters the air return space 5 through the return air pipe 51 to be further dissolved and purified with the solution in the water tank 31, realizing secondary dilution, improving the purification efficiency, and reducing the waste of resources. A anemometer and a regulating valve are respectively installed on the return air pipe 51 to monitor the wind speed of the mixed waste gas in the return air pipe 51 in real time and adjust the wind speed entering the air return space 5 through the regulating valve.

[0042] More specifically, the air suction device 41 includes a primary fan 411 and a secondary fan 412. The primary fan 411 is located below the secondary fan 412, and the primary fan 411 and the secondary fan 412 are driven by a single motor. It can effectively suck up the waste gas that has not been dissolved in the solution in the water tank 31 and release it from the air outlet pipe 42 and the return air pipe 51, improving the air suction efficiency. The outer contour of the first fan blade 4111 in the primary fan 411 is larger than the outer contour of the second fan blade 4121 in the secondary fan 412. The top of the secondary fan 412 is connected and communicated with the air outlet pipe 42 and the return air pipe 51. The primary fan 411 can more effectively suck a large amount of mixed waste gas from the air suction space 4, providing an initial large air volume suction capacity. The secondary fan 412, through the design of the smaller second fan blade 4121, further increases the waste gas extraction speed and pressure, realizing the efficient transmission of the waste gas to the air outlet pipe 42 and the return air pipe 51, and improving the working efficiency. The air suction directions of both the primary fan 411 and the secondary fan 412 are towards the air suction space 4. Preferably, the inner diameter of the return air pipe 51 is larger than the inner diameter of the air outlet pipe 42. The air volume of the waste gas that has not been dissolved in the solution in the water tank 31 and enters the return air pipe 51 is 70%, and the air volume of the waste gas that has not been dissolved in the solution in the water tank 31 and enters the air outlet pipe 42 is 30%. It can realize that most of the waste gas that has not been dissolved in the solution in the water tank 31 enters the return air space 5 through the return air pipe 51 for secondary dilution, thereby reducing energy consumption and improving the purification efficiency of the waste gas. The wind speed of the refluxing mixed waste gas in the return air space 5 is preferably 0.62 m / s.

[0043] Furthermore, above the water tank 31 and at the bottom of the inner wall of the air suction space 4 in the spraying chamber, which is far from the partition 7, that is, on the inner wall at the connection of the air suction space 4 and the dilution space 3, a mounting plate 36 is fixedly installed, and the mounting plate 36 is inclined towards the partition 7. At the bottom of the end of the mounting plate 36 facing the partition 7, a deflector 37 is fixedly installed.

[0044] Specifically, the flow guide plate 37 is of an arc structure, and the upper part of the flow guide plate 37 is placed above the water tank 31. The lower part of the flow guide plate 37 extends into the water tank 31 and is connected to the mounting block in the water tank 31. The concave part of the arc structure of the flow guide plate 37 faces the inclined flow guide platform 34, so that the undissolved waste gas in the dilution space 3 passes through the flow guide plate 37 and is sucked into the air suction space 4 by the air suction device 41. The air suction device 41 allows a part of the waste gas to enter the next purification device through the air outlet pipe 42, and another part of the waste gas enters the air return space 5 through the air return pipe 51, so that the waste gas enters the water tank 31 for secondary dilution. By setting the flow guide plate 37, it can effectively guide the waste gas that is not completely dissolved in the dilution space 3 to the air suction device 41, improving the waste gas collection efficiency, reducing the residence time of the waste gas in the room, lowering the concentration of harmful substances in the working environment, and enhancing the operation safety. When the waste gas that is not absorbed and diluted by the solution in the water tank 31 passes through the flow guide plate 37, it can come into contact with the water surface again, realizing the secondary dilution of the waste gas and further improving the purification efficiency.

[0045] Furthermore, a plurality of water baffle plates 43 are fixedly installed on the side wall of the partition plate 7 facing the air suction space 4 and on the inner wall of the air suction space 4 on one side relative to the partition plate 7. The plurality of water baffle plates 43 are arranged in a staggered manner from top to bottom. The water baffle plate 43 is of an arc structure and the concave part of the arc structure faces the water tank 31. It can effectively intercept and guide the water droplets evaporated from the surface of the water tank 31 and sucked up or splashed by the air suction device 41 with the waste gas to fall back into the water tank 31, preventing the water droplets from being sucked into the air suction device 41, avoiding damage to the fan caused by water droplet erosion, and extending the service life of the equipment.

[0046] Furthermore, the bottom of the partition plate 7 is Y-shaped and the opening of the Y-shape faces the water tank 31. One end of the mounting plate 36 facing the partition plate 7 is located within the opening of the Y-shape and has a gap with the partition plate 7, so as to form a specific air flow channel between the partition plate 7 and the mounting plate 36, ensuring that the waste gas can flow more concentratedly and orderly when passing above the water tank 31. An air passing louver 71 is installed at one end of the Y-shape close to the water tank 31, so that the undiluted waste gas enters the air suction space 4 through the air passing louver 71. By setting the air passing louver 71, it can jointly form a barrier with the partition plate 7 and the mounting plate 36, and does not hinder the flow of the waste gas, preventing the water vapor and liquid droplets above the water tank 31 from directly entering the air suction device 41, thereby realizing a preliminary barrier to prevent the water vapor and liquid droplets from entering the air suction device 41, and further reducing the damage rate of the air suction device 41. In addition, there is a gap between the bottom of the air passing louver 71 and the surface of the solution in the water tank 31, preventing the bottom of the air passing louver 71 from touching the solution and affecting the mixed waste gas that is not absorbed and dissolved by the solution from entering the air suction space 4 through the air passing louver 71.

[0047] With the above structure, the working principle of a spray booth for purifying spray air with reduced air volume and increased concentration in this embodiment is as follows:

[0048] As Figure 1 shown, first, assemble all components. In the initial state, all devices are turned on and start working. Then, fresh air is input into the spray painting space 2 through the fresh air inlet pipe 1. At the same time, the staff drives the spray gun assembly 21 to spray paint the outer surface of the workpiece 22. The exhausted gas after spraying is mixed with the fresh air and is released into the dilution space 3 from the connection between the dilution space 3 and the spray painting space 2. The mixed exhausted gas initially impacts the isolation baffle 6. Since the isolation baffle 6 is inclined downward, and the vertical cross-sectional area of the isolation baffle 6 and the dilution space 3 gradually decreases from top to bottom, the wind speed of the mixed exhausted gas entering the dilution space 3 along the isolation baffle 6 gradually decreases, so that the concentration of the mixed exhausted gas above the water tank 31 gradually increases, achieving the effect of reducing air volume and increasing concentration. Immediately afterwards, most of the mixed exhausted gas that can be dissolved in the solution fully reacts with the solution in the water tank 31 and is absorbed by the solution, while the mixed exhausted gas that cannot be absorbed and dissolved by the solution passes through the air-permeable louvers 71 and enters the air suction space 4 along the guide plate 37 through the specific channel formed by the Y shape of the mounting plate 36 and the partition 7. The air suction device 41 sucks up the mixed exhausted gas. Since the solution in the water tank 31 will evaporate steam, and when the air suction device 41 sucks up the mixed exhausted gas, it will cause the mixed exhausted gas to carry the steam and water droplets into the air suction space 4. The water baffle 43 blocks the steam and water droplets to prevent the steam and water droplets from entering the air suction device 41 and damaging the air suction device 41. Among them, the motor in the air suction device 41 drives the first fan blade 4111 in the first-stage fan 411 and the second fan blade 4121 in the second-stage fan 412 to rotate simultaneously. The first-stage fan 411 initially sucks up the mixed exhausted gas sufficiently through the first fan blade 4111, and the second fan blade 4121 in the second-stage fan 412 increases the wind speed and pressure of the mixed exhausted gas sucked up by the first-stage fan 411, so that the mixed exhausted gas is efficiently transmitted to the air outlet pipe 42 and the return air pipe 51. Then, 30% of the mixed exhausted gas output from the air suction device 41 enters the next purification device through the air outlet pipe 42, while 70% of the mixed exhausted gas enters the return air space 5 through the return air pipe 51. The mixed exhausted gas in the return air space 5 enters the dilution space 3 from the gap between the isolation baffle 6 and the partition 7 for secondary dilution.

[0049] While the above working process is in progress, the fresh air inlet pipe 1 continuously inputs fresh air into the spray painting space 2, the spray gun assembly 21 continuously sprays paint on the workpiece 22, the mixed exhausted gas continuously enters the dilution space 3 from the spray painting space 2, and then continues the above working process, which will not be elaborated here.

[0050] Embodiment Two

[0051] Different from the first embodiment, in a spray booth for purifying spray air and reducing wind and increasing concentration in this embodiment, an air distribution plate can be installed at the output end of the fresh air inlet pipe 1 and on the top of the painting space 2 to make the wind speed of the fresh air entering the painting space 2 from the fresh air inlet pipe 1 uniform. Additionally, a filter plate can be installed below the air distribution plate. The vertical cross-section of the filter plate is L-shaped, and the vertical section of the filter plate is connected to the inner wall of the top of the spray booth for reducing wind and increasing concentration to separate the return air space 5 from the painting space 2. The horizontal section is connected to the inner wall of the side of the painting space 2 away from the return air space 5 to filter the fresh air entering the painting space 2 from the fresh air inlet pipe 1 and prevent impurities in the fresh air, such as dust and sand, from entering the painting space 2 and affecting the quality of the fresh air in the painting space 2. One free end of the isolation baffle 6 is connected to the bottom wall of the end of the horizontal section of the filter plate close to the vertical section, and the other free end extends obliquely downward above the water tank 31.

[0052] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0053] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected with", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on the top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "under the bottom of" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0055] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0056] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A reduced airflow and concentrated spraying room for purifying spraying air, comprising a fresh air inlet duct (1), a spraying space (2) connected to and in communication with the fresh air inlet duct (1), and a dilution space (3) in communication with the spraying space (2), characterized in that: It also includes a folded-line isolation baffle (6) fixedly mounted on the top of the paint spraying space (2) and formed by two baffles connected at an angle; One free end of the isolation baffle (6) is vertically fixedly connected to the top of the paint spraying space (2), and the other free end extends obliquely downward toward the dilution space (3) to the top of the dilution space (3). The angle end of the isolation baffle (6) is located above the connection between the paint spraying space (2) and the dilution space (3). The inner angle of the isolation baffle (6) faces the top inner wall of the wind reduction and concentration spraying room. The vertical cross-sectional area of ​​the isolation baffle (6) located above the dilution space (3) and the dilution space (3) gradually decreases from top to bottom, so that the wind speed entering the dilution space (3) from the paint spraying space (2) is gradually reduced.

2. A reduced airflow and concentrated spraying room for purifying spraying air as claimed in claim 1, characterized in that: Also included are a plurality of spray gun assemblies (21) and a plurality of workpieces (22); The plurality of workpieces (22) are placed in parallel and at intervals on a workbench (23) at a connection point between the spray painting space (2) and the dilution space (3); the plurality of spray gun assemblies (21) are installed in the spray painting space and the plurality of spray gun assemblies (21) correspond to the plurality of workpieces (22) one by one, so as to spray paint on the plurality of workpieces (22); A section of the isolation baffle (6) located above the plurality of workpieces (22) is arc-shaped, and an inner concave portion of the arc faces the plurality of workpieces (22).

3. A reduced airflow and increased concentration spray room for purifying spray air as claimed in claim 1, characterized in that: The dilution space (3) is provided with a water tank (31), a liquid outlet pipe (32) and a liquid inlet pipe (33); One end of the water trough (31) away from the paint spraying space (2) is connected to and communicated with the liquid outlet pipe (32), and one end of the water trough (31) close to the paint spraying space (2) is communicated with the liquid inlet pipe (33) through an inclined guide platform (34), so that the waste gas entering the dilution space (3) from the paint spraying space (2) enters the water trough (31) for absorption and dilution.

4. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 3, characterized in that: A liquid level sensor (35) is installed in the water tank (31), and the liquid level sensor (35) is located in the water tank (31) near the liquid outlet pipe (32).

5. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 3, characterized in that: The reduced air concentration spraying room also includes an air suction space (4) and an air return space (5); The air suction space (4) and the return air space (5) are arranged adjacently and in parallel and are both located above the dilution space (3) and are both connected to the dilution space (3); an air suction device (41) is fixedly installed on the top of the air suction space (4); the air suction port of the air suction device (41) faces the air suction space (4); the air outlet of the air suction device (41) is connected to and connected with the air outlet pipe (42) and the return air pipe (51) respectively; the air outlet pipe (42) is connected to and connected with the return air pipe (51); the end of the air outlet pipe (42) away from the air suction device (41) is connected to the next purification device; the end of the return air pipe (51) away from the air outlet pipe (42) is connected to and connected with the top of the return air space (5); A partition (7) is fixedly installed on the top of the connection between the suction space (4) and the return air space (5), and the bottom of the partition (7) extends to the top of the dilution space (3) and has a gap with the water surface of the water tank (31); the isolation baffle (6) can separate the paint spraying space (2) and the return air space (5), and there is a gap between the partition (7) and the isolation baffle (6).

6. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 5, characterized in that: The air suction device (41) comprises a primary fan (411) and a secondary fan (412); The primary fan (411) is located below the secondary fan (412), and the outer contour of the first fan blade (4111) in the primary fan (411) is larger than the outer contour of the second fan blade (4121) in the secondary fan (412), and the top of the secondary fan (412) is connected to and communicates with the air outlet pipe (42) and the air return pipe (51); The air suction directions of the primary fan (411) and the secondary fan (412) are both toward the air suction space (4).

7. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 6, characterized in that: The inner diameter of the return air duct (51) is greater than the inner diameter of the outlet air duct (42); the air volume of the waste gas that has not been dissolved in the solution in the water tank (31) and enters the return air duct (51) is 70%, and the air volume of the waste gas that has not been dissolved in the solution in the water tank (31) and enters the outlet air duct (42) is 30%.

8. A reduced airflow and increased concentration spray room for purifying spray air as claimed in claim 5, characterized in that: A mounting plate (36) is fixedly mounted above the water tank (31) and the mounting plate (36) is arranged obliquely toward the partition (7), and a guide plate (37) is fixedly mounted at the bottom of one end of the mounting plate (36) facing the partition (7); The guide plate (37) is an arc-shaped structure, and the upper part of the guide plate (37) is placed above the water tank (31), and the lower part of the guide plate (37) penetrates into the water tank (31) and is connected to the mounting block in the water tank (31). The inner concave part of the arc-shaped structure of the guide plate (37) faces the inclined guide platform (34), so that the undissolved waste gas from the dilution space (3) passes through the guide plate (37) and is sucked into the suction space (4) by the suction device (41). The suction device (41) allows a part of the waste gas to enter the next purification device through the air outlet pipe (42), and another part of the waste gas enters the return air space (5) through the return air pipe (51), so that the waste gas enters the water tank (31) for secondary dilution.

9. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 8, characterized in that: A plurality of water baffles (43) are fixedly mounted on the side wall of the partition (7) facing the air suction space (4) and on the inner wall of the air suction space (4) opposite to the partition (7); the plurality of water baffles (43) are staggered from top to bottom; the water baffles (43) are arc-shaped structures, and the inner concave portion of the arc-shaped structure faces the water tank (31).

10. A reduced airflow and increased concentration spraying room for purifying spraying air as claimed in claim 9, characterized in that: The bottom of the partition (7) is Y-shaped and the opening of the Y-shape faces the water tank (31); one end of the mounting plate (36) facing the partition (7) is located in the Y-shaped opening and is spaced from the partition (7); An air louver (71) is installed at one end of the Y-shape close to the water tank (31) so that the undiluted exhaust gas can enter the air suction space (4) through the air louver (71).

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