Coating liquid feeding and recycling integrated device

Abstract

The utility model discloses a coating liquid feeding and recycling integrated device which comprises a transversely-arranged falling curtain coating nozzle, a conveying roller is arranged below the falling curtain coating nozzle, the conveying roller is rotationally installed in a recycling hopper, and the top of the recycling hopper is provided with an opening; the bottom of the recovery hopper is connected with a filter through a pipeline, two filter cavities are formed in the upper part of a main body of the filter side by side, a collecting cavity is formed in the lower part of the main body of the filter, the collecting cavity is communicated with the bottom ends of the two filter cavities, and filter elements are mounted in the filter cavities; the bottom of the filter is connected with one end of a liquid return pipe, and a second electromagnetic three-way valve, a reflux pump and a check valve are sequentially installed on the liquid return pipe. According to the coating liquid feeding and recycling integrated device provided by the utility model, the filter element can be replaced on the premise that the coating operation is not stopped, so that the normal coating process is ensured.

Description

Technical Field

[0001] This utility model relates to an integrated device for feeding and recycling coating liquid, belonging to the technical field of coating equipment. Background Technology

[0002] A coated film is a thin film formed by applying a coating liquid to the surface of a substrate through a specific process, followed by drying and curing.

[0003] Currently, the recycling of coating liquid is of great significance to both enterprises and the environment. On the one hand, recycling and reuse can significantly reduce the consumption of raw materials and lower production costs; on the other hand, recycling and processing can reduce waste emissions and environmental pollution, which is in line with the concept of sustainable development.

[0004] Existing technology for coating liquid feeding and recovery devices requires replacement of filter elements after prolonged use when filtering the coating liquid. However, replacing the filter elements requires stopping the coating operation, which affects the normal coating process.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] This invention addresses the shortcomings of the prior art by providing an integrated coating liquid feeding and recovery device, which allows for the replacement of filter elements without stopping the coating operation, thus ensuring the normal coating process.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] The coating liquid feeding and recovery integrated device includes a horizontally arranged curtain coating nozzle, a conveyor roller below the curtain coating nozzle, the conveyor roller being rotatably installed in a recovery hopper, and an opening at the top of the recovery hopper; a filter is connected to the bottom of the recovery hopper through a pipeline, the upper part of the filter body has two filter chambers arranged side by side, and the lower part of the filter body has a collecting chamber, which is connected to the bottom of the two filter chambers, and filter elements are installed inside the filter chambers; the bottom of the filter is connected to one end of a return liquid pipe, and a second electromagnetic three-way valve, a return pump, and a check valve are sequentially installed on the return liquid pipe.

[0009] Furthermore, the two filter chambers are not connected to each other.

[0010] Furthermore, the curtain coating nozzle is connected to the end of the liquid inlet pipe.

[0011] Furthermore, the other end of the return pipe is connected to the inlet pipe via a tee connector, thus connecting the return pipe and the inlet pipe.

[0012] Furthermore, a first electromagnetic three-way valve is installed on the pipeline between the recovery hopper and the filter.

[0013] Furthermore, the tops of the two filter chambers are connected to different ports of the first electromagnetic three-way valve.

[0014] Furthermore, the left and right ports of the second electromagnetic three-way valve are connected to the return pipe.

[0015] Furthermore, the bottom port of the second solenoid three-way valve is connected to the output pipe.

[0016] Furthermore, the check valve is positioned near the tee connector.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0018] The inlet pipe delivers the coating liquid to the curtain coating nozzle, which forms a liquid curtain to coat the moving film. The coating liquid dripping during the coating process is collected through the recovery hopper, filtered by the filter, and then pumped back to the inlet pipe by the return pipe for recycling.

[0019] By setting two filtration chambers inside the filter, each chamber is equipped with a filter element. The filter element filters the coating liquid and adsorbs mechanical impurities in the coating liquid onto the outer wall of the filter element. The two filter elements can be used alternately, achieving one in use and one in reserve, avoiding the problem of interruption of the filtration process due to filter element replacement.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the filter.

[0023] In the diagram, 1-coating nozzle, 2-recovery hopper, 3-transfer roller, 4-film, 5-inlet pipe, 6-first electromagnetic three-way valve, 7-filter, 8-filter chamber, 9-collection chamber, 10-filter element, 11-return pipe, 12-three-way connector, 13-second electromagnetic three-way valve, 14-return pump, 15-check valve, 16-output pipe. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2As shown in the figure, this utility model provides an integrated device for feeding and recycling coating liquid, including a horizontally arranged curtain coating nozzle 1, a conveying roller 3 below the curtain coating nozzle 1, the conveying roller 3 is used for conveying film 4, the conveying roller 3 is rotatably installed in the recycling hopper 2, and the top of the recycling hopper 2 is open.

[0026] The curtain coating nozzle 1 is connected to the end of the liquid inlet pipe 5, and the liquid inlet pipe 5 delivers the coating liquid into the curtain coating nozzle 1.

[0027] A filter 7 is connected to the bottom of the recycling hopper 2 via a pipeline, and a first electromagnetic three-way valve 6 is installed on the pipeline between the recycling hopper 2 and the filter 7.

[0028] The bottom of the filter 7 is connected to one end of the return pipe 11, and the other end of the return pipe 11 is connected to the inlet pipe 5 through a three-way connector 12. The return pipe 11 and the inlet pipe 5 are connected in a continuous manner.

[0029] The coating liquid collected by the recovery hopper 2 is filtered by the filter 7 and then pumped back into the inlet pipe 5 by the return pipe 11 to achieve recycling.

[0030] The first electromagnetic three-way valve 6 is used to control the flow direction of the coating liquid.

[0031] The filter 7 has two filter chambers 8 arranged side by side in the upper part of its main body. The two filter chambers 8 are not connected to each other. The filter 7 has a collection chamber 9 in the lower part of its main body. The collection chamber 9 is connected to the bottom end of the two filter chambers 8.

[0032] The tops of the two filter chambers 8 are connected to different ports of the first electromagnetic three-way valve 6, which is used to control the flow of coating liquid into the left or right filter chamber 8.

[0033] The filter chamber 8 is equipped with a filter element 10, which filters the coating liquid and adsorbs mechanical impurities in the coating liquid onto the outer wall of the filter element 10.

[0034] The two filter elements 10 can be used alternately, with one in use and one on standby, to avoid interruptions in the filtration process due to the replacement of filter element 10.

[0035] The return pipe 11 is sequentially equipped with a second electromagnetic three-way valve 13, a return pump 14, and a check valve 15.

[0036] The left and right ports of the second electromagnetic three-way valve 13 are connected to the return pipe 11, and the bottom port of the second electromagnetic three-way valve 13 is connected to the output pipe 16. The coating liquid treated by the filter 7 can be either recycled or output through the output pipe 16 for later use.

[0037] The check valve 15 is located near the three-way connector 12 to prevent the coating liquid in the inlet pipe 5 from entering the return pipe 11.

[0038] The specific working principle of this utility model is as follows:

[0039] The inlet pipe 5 delivers the coating liquid to the curtain coating nozzle 1, which forms a liquid curtain to coat the running film 4. The coating liquid dripping during the coating process is collected by the recovery hopper 2, filtered by the filter 7, and then pumped back to the inlet pipe 5 by the return pipe 11 to achieve recycling.

[0040] Two filter chambers 8 are set in the upper part of the main body of the filter 7. Each filter chamber 8 is equipped with a filter element 10. The filter element 10 filters the coating liquid and adsorbs mechanical impurities in the coating liquid onto the outer wall of the filter element 10. The two filter elements 10 can be used alternately, so as to achieve one in use and one in reserve, avoiding the problem of interruption of the filtration process due to the replacement of the filter element 10.

[0041] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. An integrated device for feeding and recovering coating liquid, characterized in that: The filter includes a horizontally arranged curtain coating nozzle (1), a conveyor roller (3) below the curtain coating nozzle (1), the conveyor roller (3) is rotatably installed in the recovery hopper (2), the recovery hopper (2) has an opening at the top; the bottom of the recovery hopper (2) is connected to a filter (7) through a pipeline, the upper part of the filter (7) has two filter chambers (8) arranged side by side, the lower part of the filter (7) has a collection chamber (9), the collection chamber (9) is connected to the bottom of the two filter chambers (8), and a filter element (10) is installed inside the filter chamber (8); the bottom of the filter (7) is connected to one end of the return pipe (11), and the return pipe (11) is sequentially equipped with a second electromagnetic three-way valve (13), a return pump (14) and a check valve (15).

2. The integrated coating liquid feeding and recovery device as described in claim 1, characterized in that: The two filter chambers (8) are not connected to each other.

3. The integrated coating liquid feeding and recycling device as described in claim 1, characterized in that: The curtain coating nozzle (1) is connected to the end of the liquid inlet pipe (5).

4. The integrated coating liquid feeding and recycling device as described in claim 3, characterized in that: The other end of the return pipe (11) is connected to the inlet pipe (5) through a three-way connector (12), and the return pipe (11) and the inlet pipe (5) are connected in a continuous manner.

5. The integrated coating liquid feeding and recovery device as described in claim 1, characterized in that: A first electromagnetic three-way valve (6) is installed on the pipeline between the recovery hopper (2) and the filter (7).

6. The integrated coating liquid feeding and recovery device as described in claim 5, characterized in that: The tops of the two filter chambers (8) are connected to different ports of the first solenoid three-way valve (6).

7. The integrated coating liquid feeding and recycling device as described in claim 1, characterized in that: The left and right ports of the second electromagnetic three-way valve (13) are connected to the return pipe (11).

8. The integrated coating liquid feeding and recovery device as described in claim 7, characterized in that: The bottom port of the second electromagnetic three-way valve (13) is connected to the output pipe (16).

9. The integrated coating liquid feeding and recovery device as described in claim 1, characterized in that: The check valve (15) is located near the tee joint (12).

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