Coating pulse atomization system

Abstract

The invention relates to the technical field of spraying treatment, and discloses a coating pulse atomization system which comprises a power part used for pressurizing and conveying a coating into a pipeline and maintaining the coating in the pipeline at a set pressure; the atomizing and spraying part is used for atomizing and spraying the coating in the pipeline and intermittently spraying the coating to the workpiece; and the coating heating part is arranged between the atomizing and spraying part and the power part and is used for heating the coating and keeping the temperature of the coating reaching the atomizing and spraying part at a set temperature. The high-solid-content coating can be atomized without using air, the atomization stroke is shortened, and the equipment size is reduced; when the high-solid-content coating is atomized, a solvent does not need to be used, zero VOC emission is achieved, a sprayed workpiece does not need to wait for solvent volatilization, and the drying time is shortened; in the atomization spraying process, the atomization dispersity is low, the coating utilization rate is increased, the spraying mode reduces the over-spraying phenomenon of the coating, and the time needed for spraying the coating on the workpiece is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying processing, and more particularly to a paint pulse atomization system. Background Art

[0002] Paint is usually applied to the surface of an object by spraying. In traditional painting operations, paint is generally applied by air spraying to the surface of an object.

[0003] When the above-mentioned spraying treatment method is adopted, a large amount of solvent needs to be added to the paint, and after the paint is sprayed onto the surface of the object, it needs a long time to dry; VOC (volatile organic compounds) will be generated during the spraying process, so the VOC generated during the spraying process also needs to be treated to meet environmental protection requirements; air spraying makes the atomization stroke of the paint longer and the dispersion higher, resulting in waste of paint, and the overall volume occupied by the spraying treatment equipment is larger; therefore, the overall volume of the traditional coating production line is relatively large, the utilization rate of the paint is low, and the environmental protection management cost is high.

[0004] Therefore, it is necessary to propose a paint pulse atomization system to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to define the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a paint pulse atomization system, comprising:

[0007] The power unit is used to pressurize the paint and transport it into the pipeline, and maintain the paint in the pipeline at a set pressure;

[0008] The atomizing spraying part is used to atomize and spray the paint in the pipeline, and spray the paint intermittently onto the workpiece;

[0009] The paint heating part is arranged between the atomizing spraying part and the power part, and is used to heat the paint and maintain the temperature of the paint reaching the atomizing spraying part at a set temperature.

[0010] Preferably, the set temperature range is: 30°C to 95°C.

[0011] Preferably, the nozzle diameter of the atomizing spray portion ranges from 0.5 mm to 1.5 mm.

[0012] Preferably, it further comprises: a filter, which is arranged on the pipeline between the paint heating part and the atomizing spraying part and is used to filter the paint.

[0013] Preferably, it further comprises: a diverter, which is arranged on the conveying section of the pipeline and is used to connect the filter and the multiple atomizing spray parts.

[0014] Preferably, it further comprises: a confluence arranged on the reflux section of the pipeline for connecting a plurality of atomizing spraying parts and a paint storage part, wherein the paint storage part is used for storing paint.

[0015] Preferably, a back pressure valve is provided on the pipeline between the flow combiner and the paint storage portion.

[0016] Preferably, a flow valve is further provided on the pipeline between the diverter and the atomizing spraying portion.

[0017] Preferably, the set temperature and the set pressure are set according to the material of the coating and the limit temperature and the limit pressure that the workpiece to be sprayed can withstand.

[0018] Preferably, the invention further comprises: a stirrer, which is arranged on the paint storage portion and is used to stir the paint.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The paint pulse atomization system described in the present invention realizes atomization spraying through the provided power part, atomization spray part and paint heating part. It can atomize high-solid content paint without using air, so that the atomization stroke is shortened and the volume of the spray processing equipment is reduced; when atomizing high-solid content paint, no solvent is required, zero VOC emissions can be achieved, and no environmental protection management is required. In this way, the workpiece after spraying does not need to wait for the solvent to evaporate, thereby reducing the drying time. Compared with the drying station in the traditional painting operation, the length of the subsequent infrared drying station can be shortened; in the atomization spraying process, the atomization dispersion is low, which improves the utilization rate of the paint. The spraying method of the present invention can greatly reduce the overspray phenomenon of the paint, and the workpiece can be well covered by the atomization spraying, and the time required to spray the paint on the workpiece is shortened, and the shortest time can be less than 1 second.

[0021] The paint pulse atomization system described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a structural schematic diagram of the paint pulse atomization system of the present invention applied to a coating production line;

[0024] Figure 2 This is a schematic diagram of the pipe connection structure with a delivery section and a return section in the paint pulse atomization system of the present invention;

[0025] Figure 3 This is a schematic diagram of the pipeline connection structure of the paint pulse atomization system described in the present invention, which only has a conveying section. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0027] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0028] like Figure 1-Figure 3 As shown, the present invention provides a paint pulse atomization system, comprising:

[0029] The power unit 1 is used to pressurize the paint and deliver it to the pipeline 11, and maintain the paint in the pipeline 11 at a set pressure;

[0030] The atomizing spraying part 2 is used to atomize and spray the paint in the pipeline 11, and intermittently spray the paint onto the workpiece;

[0031] The paint heating unit 3 provided between the atomizing spraying unit 2 and the power unit 1 is used to heat the paint and maintain the temperature of the paint reaching the atomizing spraying unit 2 at a set temperature.

[0032] The power unit 1 is a pump, which can be a pneumatic diaphragm pump, and the paint heating unit 3 is any heater that can heat the paint;

[0033] like Figure 1 As shown, the workpiece is transported on the conveyor line 12, and the atomizing spraying part 2 is set on one side of the conveyor line 12. When the workpiece is transported to the position corresponding to the atomizing spraying part 2, the atomizing spraying part 2 sprays the paint on the workpiece;

[0034] The coatings include high-solid coatings, coatings containing photoinitiators, and water-based coatings. Among them, high-solid coatings do not contain solvents (or contain very small amounts of solvents under specific conditions). When coatings containing photoinitiators are exposed to ionizing radiation, the photoinitiators will cause a chain reaction of cross-linking (curing) of the coatings. However, the above-mentioned method can still be used to atomize the coatings.

[0035] When atomizing the paint, no air is needed. The paint is sucked in and transported to the pipeline 11 by the power unit 1, and the pressure of the paint in the pipeline 11 is maintained at the set pressure.

[0036] The atomizing spraying part 2 includes: a spraying body, a pulse switch and a nozzle arranged on the spraying body. The pulse switch is used to intermittently control the on-off of the spraying body and the pipeline 11. When the pulse switch is in the on state, the atomizing spraying part 2 transports the paint of the set pressure to the nozzle for atomization through the pulse switch. After the pulse switch is turned on, the paint of the set pressure enters the interior of the spraying body. The paint will form a certain impact force on the nozzle (similar to a water hammer), so that the paint can be further pressurized when it reaches the nozzle, which is conducive to better atomization of the paint by the nozzle; during the operation of the atomizing spraying part 2, the pressure in the pipeline 11 is always maintained at the set pressure, which can improve the pressure consistency of the paint atomized and sprayed from the nozzle each time, and improve the consistency of the spraying effect on the workpiece;

[0037] The paint heating part 3 can heat the paint during the paint transportation process. Since the pipeline 11 between the paint heating part 3 and the atomizing spray part 2 has a certain length, there will be heat loss. A temperature sensor can be set on the pipeline 11 near the atomizing spray part 2 to detect the paint temperature at the inlet of the atomizing spray part 2, and then feed back the real-time detected temperature to the paint heating part 3 to adjust the heating temperature of the paint heating part 3 to ensure that the temperature of the paint reaching the atomizing spray part 2 is maintained at the set temperature, thereby ensuring the fluidity of the paint, thereby improving the atomization stability of the paint at the nozzle, and further ensuring the spraying effect on the workpiece.

[0038] Through the above design, the paint pulse atomization system can atomize high-solid content paint without using air, so that the atomization stroke is shortened and the volume of the spray processing equipment is reduced; when atomizing high-solid content paint, no solvent is required, zero VOC emissions can be achieved, and no environmental protection management is required. In this way, the workpiece after spraying does not need to wait for the solvent to evaporate, thereby reducing the drying time. Compared with the drying station in the traditional painting operation, the length of the subsequent infrared drying station can be shortened; in the atomization spraying process, the atomization dispersion is low, which improves the utilization rate of the paint. The spraying method of the present invention can greatly reduce the overspray phenomenon of the paint, and the workpiece can be well covered by the atomization spraying, and the time required to spray the paint on the workpiece is shortened, and the shortest time can be less than 1 second.

[0039] In one embodiment, the set temperature range is: 30°C to 95°C.

[0040] In one embodiment, the set temperature and the set pressure are set according to the material of the coating and the maximum temperature and maximum pressure that the workpiece to be sprayed can withstand.

[0041] The set temperature and set pressure are set according to the material of the paint and the maximum temperature and maximum pressure that the workpiece to be sprayed can withstand. Since the viscosity of paints of different materials is different, in order to ensure the flow and atomization effect of the paint, the set temperature and set pressure are also set to different. At the same time, the maximum temperature and maximum pressure that the workpiece to be sprayed of different materials or structures can withstand are also different. Therefore, it is necessary to ensure that the workpiece is not affected by the spraying temperature and spraying pressure, so that the set temperature and set pressure are optimal values to achieve the best atomization effect of the paint.

[0042] In one embodiment, the nozzle diameter of the atomizing spray portion 2 ranges from 0.5 mm to 1.5 mm.

[0043] The nozzle of the atomizing spraying part 2 is the outlet diameter of the nozzle. Atomization can be performed through a nozzle with a smaller diameter, thereby improving the atomizing spraying effect.

[0044] like Figure 2 and Figure 3 As shown, in one embodiment, it further includes: a filter 4, which is arranged on the pipeline 11 between the paint heating part 3 and the atomizing spraying part 2, and is used to filter the paint.

[0045] The filter 4 can filter out particles with larger particle sizes (for example, particles larger than the outlet diameter of the nozzle) in the paint, thereby ensuring the atomization effect of the paint delivered to the atomizing spray part 2 and preventing blockage.

[0046] like Figure 2 and Figure 3 As shown, in one embodiment, it further includes: a diverter 7, which is arranged on the conveying section of the pipeline 11 and is used to connect the filter 4 and the multiple atomizing spray parts 2.

[0047] When a plurality of atomizing spraying parts 2 are provided, the spraying is divided by the diverter 7 so that the paint can flow evenly to each atomizing spraying part 2 through the diverter 7 .

[0048] like Figure 3 As shown, in one embodiment, when multiple colors of paint are needed, on the basis of the above embodiment, multiple paint storage parts 5 are provided, and the paint storage parts 5 are used to hold and store paint, such as storage barrels, etc. Each paint storage part 5 is connected to a power part 1, and the power part 1 is connected to the paint heating part 3 through a color-changing valve 13. Each power part 1 is connected to each feed port of the color-changing valve 13, and the total discharge port of the color-changing valve 13 is connected to the paint heating part 3, and the discharge port corresponding to each feed port is respectively connected to the paint storage part 5; the color-changing valve 13 can switch the color of the paint to deliver paint of different colors to the atomizing spray part 2;

[0049] In order to ensure that the pressure in the pipeline 11 is maintained at a set pressure, a pressure sensor can be provided on the pipeline 11 to feed back the real-time detected pressure to the power unit 1 so as to control the delivery amount of the paint through the power unit 1 .

[0050] like Figure 2 As shown, in one embodiment, it further includes: a confluence 8, which is arranged on the return section of the pipeline 11 and is used to connect the multiple atomizing spray parts 2 and the paint storage part 5, and the paint storage part 5 is used to store paint.

[0051] When a color of paint is needed, the paint storage part 5 is set as one. At this time, the atomizing spray part 2 can be connected to the pipeline 11 through the three-way valve, so that the feed port of the atomizing spray part 2 is connected to the conveying section and the reflux section of the pipeline 11 through the three-way valve. In this way, when the pulse switch is in the closed state, the paint can flow to the merger 8 through the reflux section of the pipeline 11, and then flow back into the paint storage part 5, so that the paint can circulate in the pipeline 11, so that part of the paint heated by the paint heating part 3 will flow back into the paint storage part 5, so that the paint temperature in the paint storage part 5 is higher than its initial temperature (room temperature); when the paint is sucked into the power part 1 again, the energy consumption of the paint heating part 3 can be reduced;

[0052] When the work starts, the paint can be circulated and heated in the pipeline 11. When the temperature of the paint reaches the set temperature at the atomizing spraying part 2, the atomizing spraying process can be started on the workpiece.

[0053] like Figure 2 As shown, in one embodiment, a back pressure valve 9 is provided on the pipeline 11 between the flow combiner 8 and the paint storage portion 5 .

[0054] The back pressure valve 9 is used to control the pressure of the paint in the pipeline 11. When the pressure of the paint in the pipeline 11 is lower than the set pressure, the opening of the back pressure valve 9 is adjusted (decreased). When the pressure of the paint in the pipeline 11 is higher than the set pressure, the opening of the back pressure valve 9 is adjusted (increased) to maintain the pressure in the pipeline 11 at the set pressure.

[0055] like Figure 2 and Figure 3 As shown, in one embodiment, a flow valve 10 is further provided on the pipeline 11 between the diverter 7 and the atomizing spraying part 2 .

[0056] The flow valve 10 maintains a constant flow rate in the pipeline 11 leading to each atomizing spraying part 2 , further ensuring the consistency of the atomizing spraying effects of the multiple atomizing spraying parts 2 .

[0057] like Figure 2 and Figure 3As shown, in one embodiment, it further includes: a stirrer 6, which is arranged on the paint storage portion 5 and is used to stir the paint.

[0058] The agitator 6 can continuously stir the paint in the paint storage part 5, so that the viscosity of the paint sucked by the power part 1 at each moment is more uniform, preventing the paint from having different viscosities in the upper and lower parts of the paint storage part 5, which affects the atomization spraying effect.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A paint pulse atomization system, characterized in that: include: The power unit (1) is used to pressurize and deliver the paint to the pipeline (11) and maintain the paint in the pipeline (11) at a set pressure; An atomizing spraying portion (2) is used to atomize and spray the paint in the pipeline (11) to intermittently spray the paint onto the workpiece; The paint heating section (3) is arranged between the atomizing spray section (2) and the power section (1) and is used to heat the paint and maintain the temperature of the paint reaching the atomizing spray section (2) at a set temperature.

2. The paint pulse atomization system according to claim 1, characterized in that: The set temperature range is: 30℃~95℃.

3. The paint pulse atomization system according to claim 1, characterized in that: The nozzle diameter of the atomizing spraying part (2) ranges from 0.5 mm to 1.5 mm.

4. The paint pulse atomization system according to claim 1, characterized in that: Also includes: The filter (4) is arranged on the pipeline (11) between the paint heating part (3) and the atomizing spraying part (2) and is used for filtering the paint.

5. The paint pulse atomization system according to claim 4, characterized in that: Also includes: The flow divider (7) is arranged on the conveying section of the pipeline (11) and is used to connect the filter (4) and the plurality of atomizing spraying parts (2).

6. The paint pulse atomization system according to claim 5, characterized in that: Also includes: The confluence (8) is arranged on the reflux section of the pipeline (11) and is used to connect the plurality of atomizing spraying parts (2) and the paint storage part (5), wherein the paint storage part (5) is used to store the paint.

7. The paint pulse atomization system according to claim 6, characterized in that: A back pressure valve (9) is provided on the pipeline (11) between the flow combiner (8) and the paint storage portion (5).

8. The paint pulse atomization system according to claim 5 or 6, characterized in that: A flow valve (10) is also provided on the pipeline (11) between the flow splitter (7) and the atomizing spraying portion (2).

9. The paint pulse atomization system according to claim 1, characterized in that: The set temperature and set pressure are set according to the material of the coating and the limit temperature and limit pressure that the workpiece to be sprayed can withstand.

10. The paint pulse atomization system according to claim 6, characterized in that: Also includes: The stirrer (6) is arranged on the paint storage portion (5) and is used to stir the paint.

Images