CN115228639B - Paint supply system for electrostatic coating of water-based paint - Google Patents
Paint supply system for electrostatic coating of water-based paint Download PDFInfo
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- CN115228639B CN115228639B CN202210919229.XA CN202210919229A CN115228639B CN 115228639 B CN115228639 B CN 115228639B CN 202210919229 A CN202210919229 A CN 202210919229A CN 115228639 B CN115228639 B CN 115228639B
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- 239000003973 paint Substances 0.000 title claims abstract description 350
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 12
- 238000009503 electrostatic coating Methods 0.000 title abstract description 6
- 238000002955 isolation Methods 0.000 claims abstract description 98
- 239000003086 colorant Substances 0.000 claims abstract description 11
- 239000004922 lacquer Substances 0.000 claims abstract 3
- 239000002699 waste material Substances 0.000 claims description 77
- 238000007599 discharging Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000010422 painting Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 2
- 238000005507 spraying Methods 0.000 abstract description 31
- 239000002609 medium Substances 0.000 description 50
- 238000004140 cleaning Methods 0.000 description 25
- 239000002904 solvent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
Landscapes
- Spray Control Apparatus (AREA)
Abstract
The application provides a water paint electrostatic coating's confession lacquer system, include: at least two paint supply loops; each paint supply loop comprises a paint storage device, an input pipeline and an output pipeline, one end of the input pipeline is connected with an inlet of the paint storage device, the other end of the input pipeline is connected with an external paint storage device, one end of the output pipeline is communicated with an outlet of the paint storage device, the input pipeline and the output pipeline are communicated with an output port of an isolation device, and when the input pipeline in the paint supply loop injects paint into the paint storage device, isolation medium is injected into the input pipeline to isolate the external paint storage device from the output pipeline; after the paint storage device conveys paint to the paint discharge pipeline, injecting an isolation medium into the output pipeline to isolate the input pipeline from the output pipeline; the first control device controls each paint supply loop to alternately communicate the output pipeline with the paint discharge pipeline; through the structure, the continuous spraying of the spraying paint under the condition of electrification is completed under the condition of not changing colors.
Description
Technical Field
The present disclosure relates generally to the field of aqueous coating spraying, and more particularly to a paint supply system for electrostatic coating of aqueous coatings.
Background
The water-based paint is paint with water as a dispersion medium, has various advantages compared with solvent-based paint, has wide environmental adaptability, can greatly reduce atmospheric pollution and enhances fireproof and explosion-proof capabilities. Meanwhile, the water-based paint can not generate toxic volatile matters, and has the advantages of green, safety, convenient use and the like.
In the prior art, a single cylinder is adopted for spraying, and because the water-based paint has high conductivity, when the electrostatic atomizer is used for coating, high-voltage static electricity is conducted through the water-based paint and leaks through a paint supply system, so that continuous spraying operation under the condition of no color change cannot be realized.
Disclosure of Invention
In view of the foregoing drawbacks or deficiencies of the prior art, it is desirable to provide a paint supply system for electrostatic application of aqueous paint that addresses the above-described problems.
The application provides a paint supply system for electrostatic coating of water-based paint, which comprises the following components; at least two paint supply loops, a paint discharge pipeline, an isolation device and a first control device; wherein:
each paint supply loop comprises a paint storage device, an input pipeline and an output pipeline, wherein one end of the input pipeline is communicated with an inlet of the paint storage device, and the other end of the input pipeline is connected with an external paint storage device; one end of the output pipeline is communicated with an outlet of the paint storage device;
the output port of the isolating device is used for being communicated with an input pipeline and an output pipeline in each paint supply loop and is used for:
after paint is injected into the paint storage device through an input pipeline in the paint supply loop, an isolation medium is injected into the input pipeline so as to isolate the external paint storage device from the output pipeline;
after the paint storage device conveys paint to the paint discharging pipeline, an isolation medium is injected into the output pipeline so as to isolate the input pipeline from the output pipeline;
and the first control device is used for controlling each paint supply loop to alternately communicate the output pipeline with the paint discharge pipeline so as to enable each paint storage device to alternately output paint to the paint discharge pipeline.
According to the technical scheme provided by the embodiment of the application, the isolation device comprises a first isolation unit and a second isolation unit, wherein the first isolation unit is used for injecting a first isolation medium into the input pipeline, and the second isolation unit is used for injecting a second isolation medium into the output pipeline.
According to the technical scheme provided by the embodiment of the application, the first isolation unit comprises:
the output end of the first conveying module is connected with an isolation port of the input pipeline, and the isolation port is arranged on the side wall of the input pipeline and is positioned between the external paint storage device and the paint storage device; the first conveying module controls the injection of a first isolation medium into the input pipeline;
the first waste discharge unit comprises a first switching valve and a first waste discharge pipeline connected with the first switching valve, wherein the first switching valve is arranged at one end, close to the paint storage device, of the input pipeline and is used for enabling the input pipeline to be communicated with the paint storage device or the first waste discharge pipeline.
According to the technical scheme provided by the embodiment of the application, the second isolation unit comprises:
the second conveying module is connected with a second switching valve, and the second switching valve is arranged at one end of the output pipeline close to the paint storage device and is used for enabling the output pipeline to be communicated with the paint storage device or the second conveying module; the second conveying module controls the injection of a second isolation medium into the output pipeline;
the second waste discharge unit comprises a second waste discharge pipeline connected with the first control device, and the first control device is also used for enabling the output pipeline to be communicated with the second waste discharge pipeline or the paint discharge pipeline.
According to the technical scheme provided by the embodiment of the application, the number of the paint supply loops is two, and the paint supply loops comprise a first loop and a second loop; the first control device is used for controlling the output pipeline of the first loop and the output pipeline of the second loop to be alternately communicated with the paint discharging pipeline, so that the paint storage device of the first loop and the paint storage device of the second loop alternately output paint to the paint discharging pipeline.
According to the technical scheme provided by the embodiment of the application, the paint supply loop further comprises: the third switching valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with one end, far away from the first control device, of the second waste discharge pipeline, the second valve port is connected with a recovery unit and is used for recovering second isolation medium and waste discharged by the output pipeline, and the third valve port is used for injecting an emptying medium into the second waste discharge pipeline; the third switching valve is used for enabling the first valve port to be communicated with the second valve port or the third valve port.
According to the technical scheme provided by the embodiment of the application, the output pipeline is provided with the fourth switching valve near the third switching valve, the fourth switching valve is connected with the third waste discharge pipeline, and the fourth switching valve is used for switching the paint storage device and the output pipeline or the third waste discharge pipeline is communicated.
According to the technical scheme provided by the embodiment of the application, the first waste discharge pipeline is provided with a position sensor close to the paint storage device.
According to the technical scheme provided by the embodiment of the application, the paint supply loop further comprises:
the input end of the second control device is connected with the external paint storage device, and the output end of the second control device is respectively connected with the two input pipelines and used for controlling the external paint storage device to sequentially convey paint to the two input pipelines.
According to the technical scheme provided by the embodiment of the application, the external paint storage device comprises a plurality of paint storage modules for storing paint with the same or different colors and a cleaning unit for cleaning the paint supply loop; and the paint storage module is provided with a one-way valve.
The beneficial effects of this application lie in: based on the technical scheme provided by the application, firstly, the external paint storage device injects paint into the paint storage device through an input pipeline in a paint supply loop, after the paint injection is completed, the isolation device injects isolation medium into the input pipeline in the paint supply loop to isolate the external paint storage device from an output pipeline, and the first control device controls the output pipeline of the first paint supply loop to be communicated with the paint discharge pipeline for spraying; when one paint supply loop is used for spraying, the external paint storage device injects paint into the paint storage device through an input pipeline in the other paint supply loop, and after the paint injection is completed, the isolation device injects isolation medium into the input pipeline in the other paint supply loop to isolate the external paint storage device from the output pipeline; when one paint supply loop is sprayed, the first control device controls the output pipeline of the other paint supply loop to be communicated with the paint discharge pipeline for spraying; simultaneously, the isolation device injects isolation medium into an output pipeline of the paint supply loop to isolate the input pipeline from the output pipeline; through the structure, the continuous spraying of the spraying paint under the condition of electrification is completed under the condition of not changing colors.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
fig. 1 is a schematic diagram of a paint supply system for electrostatic coating of a water-based paint.
1. A paint discharging pipeline; 2. an external paint storage device; 3. a paint storage device; 4. an input pipeline; 5. an output line; 6. a first control device; f02, a first conveying module; f10, a first switching valve; 7. a first waste discharge line; f11, a second switching valve; x11, a second transport module; 8. a second waste discharge line; FD. A third switching valve; 9. a recovery unit; f12, a fourth switching valve; 10. a third waste discharge line; 11. a position sensor; 12. a second control device; 13. a cleaning unit; 14. a paint storage module; 15. a one-way valve; 16. an atomizer; f00, a fifth switching valve; f01, a sixth switching valve; 17. and an isolation device.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
Please refer to fig. 1, which is a schematic diagram of a paint supply system for electrostatic painting of an aqueous paint, which includes: at least two paint supply loops, a paint discharge pipeline 1, an isolation device 17 and a first control device 6; wherein:
each paint supply loop comprises a paint storage device 3, an input pipeline 4 and an output pipeline 5, wherein one end of the input pipeline 4 is communicated with an inlet of the paint storage device 3, and the other end of the input pipeline is connected with an external paint storage device 2; one end of the output pipeline 5 is communicated with an outlet of the paint storage device 3;
the output port of the isolating device 17 is used for communicating with the input pipeline 4 and the output pipeline 5 in each paint supply loop and is used for:
after the paint is injected into the paint storage device 3 through the input pipeline in the paint supply loop, an isolating medium is injected into the input pipeline 4 so as to isolate the external paint storage device 2 from the output pipeline 5;
and injecting an isolating medium into the output pipeline 5 after the paint storage device 3 conveys paint to the paint discharge pipeline 1 so as to isolate the input pipeline 4 from the output pipeline 5;
and a first control device 6, wherein the first control device 6 is used for controlling each paint supply loop to alternately communicate the output pipeline 5 with the paint discharge pipeline 1 so as to enable each paint storage device 3 to alternately output paint to the paint discharge pipeline 1.
Specifically, the paint storage device 3 is a servo hydraulic cylinder;
specifically, the isolation medium is cleaning air and cleaning solvent;
specifically, the input pipeline 4 and the output pipeline 5 are spiral pipes, and the spiral pipes are of a bending structure, so that the spiral pipes are not easy to communicate when part of paint or solvent remains in the isolation process;
furthermore, compared with the single-cylinder spraying in the prior art, the input pipeline 4 and the output pipeline 5 adopt thinner spiral pipes, in order to reduce the intermittent time and complete the oil suction process as soon as possible, and the thicker input pipeline 4 and the thicker output pipeline 5 are adopted for oil inlet and oil outlet, so that the thinner spiral pipes enable the isolation medium used in isolation to be relatively less, and the waste of the system cost is reduced;
specifically, the paint discharging pipeline is connected with an atomizer 16, and the atomizer 16 is used for spraying paint.
In some embodiments, a thinner spiral pipe is used as the input pipeline 4 and the output pipeline 5, and the input pipeline 4 and the output pipeline 5 can be purged cleanly by isolating and purging the isolating medium in isolation by clean air, so that the waste of paint and the isolating medium is further reduced.
Working principle: when the paint supply system works, firstly, the external paint storage device 2 injects paint into the paint storage device 3 through an input pipeline 4 in a paint supply loop, after paint injection is completed, the isolation device 17 injects isolation medium into the input pipeline 4 in the paint supply loop to isolate the external paint storage device 2 from an output pipeline 5, and the first control device 6 controls the output pipeline 5 of the paint supply loop to be communicated with the paint discharge pipeline 1 for spraying; when one paint supply loop is used for spraying, the external paint storage device 2 injects paint into the paint storage device 3 through an input pipeline 4 in the other paint supply loop, and after the paint injection is finished, the isolation device 17 injects isolation medium into the input pipeline 4 in the other paint supply loop to isolate the external paint storage device 2 from the output pipeline 5; when the spraying of one paint supply loop is finished, the first control device 6 controls the output pipeline 5 of the other paint supply loop to be communicated with the paint discharge pipeline 1 for spraying; simultaneously, the isolating device 17 injects isolating medium into the output pipeline 5 of the paint supply loop to isolate the input pipeline 4 from the output pipeline 5; through the structure, the continuous spraying of the spraying paint is finished under the condition of not changing colors, and meanwhile, compared with the prior art, the thin spiral pipe is adopted as an input pipeline and an output pipeline, the isolation medium used in isolation is relatively less, and the waste of the system cost is reduced.
In some embodiments, the isolation device 17 includes a first isolation unit for injecting a first isolation medium into the input pipeline and a second isolation unit for injecting a second isolation medium into the output pipeline.
Specifically, the first isolation medium is cleaning air and a cleaning solvent;
specifically, the second isolation medium is cleaning air and a cleaning solvent.
In some embodiments, the first isolation unit includes:
the output end of the first conveying module F02 is connected with an isolation port of the input pipeline 4, and the isolation port is arranged on the side wall of the input pipeline 4 and is positioned between the external paint storage device 2 and the paint storage device 3; the first conveying module F02 controls the injection of a first isolating medium into the input pipeline 4;
the first waste discharge unit comprises a first switching valve F10 and a first waste discharge pipeline 7 connected with the first switching valve F10, wherein the first switching valve F10 is arranged at one end of the input pipeline 4, which is close to the paint storage device 3, and is used for enabling the input pipeline 4 to be communicated with the paint storage device 3 or the first waste discharge pipeline 7.
Specifically, the first isolation medium is cleaning air and a cleaning solvent;
specifically, when the paint is injected into the paint storage device 3 through the input pipeline 4, the first switching valve F10 is switched to enable the input pipeline 4 to be communicated with the paint storage device 3, after the paint injection is completed, the first switching valve F10 is switched to enable the input pipeline 4 to be communicated with the first waste discharge pipeline 7, the first conveying module F02 in the first isolation unit controls the injection of a first isolation medium into the input pipeline 4, the first isolation medium drives waste in the input pipeline 4 to enter the first waste discharge unit through the first waste discharge pipeline 7, and the output pipeline 5 is isolated from the external paint storage device 2 due to the fact that the water-based paint in the input pipeline 4 is removed.
In some embodiments, the second isolation unit includes:
the second conveying module X11 is connected to a second switching valve F11, and the second switching valve F11 is disposed at one end of the output pipeline 5 near the paint storage device 3, so that the output pipeline 5 is communicated with the paint storage device 3 or the second conveying module X11; the second conveying module X11 controls the injection of a second isolation medium into the output pipeline 5;
the second waste discharge unit comprises a second waste discharge pipeline 8 connected with the first control device 6, and the first control device 6 is also used for enabling the output pipeline 5 to be communicated with the second waste discharge pipeline 8 or the paint discharge pipeline 1.
Specifically, the second isolation medium is cleaning air and a cleaning solvent;
specifically, when the paint in the paint storage device 3 needs to be sprayed, at this time, the second switching valve F11 is switched to enable the output pipeline 5 to be communicated with the paint storage device 3, and meanwhile, the first control device 6 is switched to enable the output pipeline 5 to be communicated with the paint discharge pipeline 1; after the spraying is finished, the second switching valve F11 is switched to connect the output pipeline 5 with the second conveying module X11, and meanwhile, the first control device 6 is switched to connect the output pipeline 5 with the second waste discharge pipeline 8, at this time, the second conveying module X11 in the second isolation unit controls to inject a second isolation medium into the output pipeline 5, and the second isolation medium drives the waste in the output pipeline 5 to enter the second waste discharge unit through the second waste discharge pipeline 8, so that the input pipeline 4 is isolated from the output pipeline 5 due to the fact that the water-based paint in the output pipeline 5 is removed.
In certain embodiments, the paint supply circuit is two, including a first circuit and a second circuit; the first control device 6 is used for controlling the output pipeline 5 of the first loop and the output pipeline 5 of the second loop to be alternately communicated with the paint discharging pipeline 1, so that the paint storing device 3 of the first loop and the paint storing device 3 of the second loop alternately output paint to the paint discharging pipeline 1.
Specifically, two paint supply loops are provided, and the alternate spraying without color change is completed under the action of the first control device 6.
In some embodiments, a position sensor 11 is provided on the first waste line 7 adjacent to the paint reservoir 3.
Specifically, since the first isolation medium is injected into the input pipeline 4 during isolation, in order to prevent the first isolation medium in the input pipeline 4 from being fed into the paint storage device 3, before paint is injected into the paint storage device 3, the first switching valve F10 is switched to enable the input pipeline 4 to be communicated with the first waste discharge pipeline 7, the external paint storage device 2 injects paint into the input pipeline 4, and stops when the position sensor 11 senses paint, and at this time, the first isolation medium in the input pipeline 4 is discharged from the first waste discharge pipeline 7.
In certain embodiments, the paint supply circuit comprises:
the input end of the second control device 12 is connected with the external paint storage device 2, and the output end of the second control device 12 is respectively connected with the two input pipelines 4 and is used for controlling the external paint storage device 2 to sequentially convey paint to the two input pipelines 4.
Specifically, a fifth switching valve and a sixth switching valve are disposed in the second control device 12, and the sixth switching valve F01 is used for controlling the external paint storage device 2 to sequentially convey paint to the two input pipelines 4; the fifth switching valve F00 is used for controlling the on-off of the external paint storage device 2 and the two input pipelines 4.
Example 2
In certain embodiments, the paint supply circuit further comprises:
the third switching valve FD is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with one end of the second waste discharge pipeline 8, which is far away from the first control device 6, the second valve port is connected with a recovery unit 9 for recovering the second isolation medium and the waste discharged by the output pipeline 5, and the third valve port is used for injecting the emptying medium into the second waste discharge pipeline 8; the third switching valve FD is used to communicate the first valve port with the second valve port or the third valve port.
Specifically, in order to reduce the waste of the paint, after the paint spraying in the paint storage device 3 is completed and before the output pipeline 5 is isolated, the third switching valve FD is controlled to enable the first valve port to be communicated with the third valve port, the emptying medium is injected into the second waste discharge pipeline 8 through the third valve port, meanwhile, the first control device 6 is switched to be communicated with the output pipeline 5 and the second waste discharge pipeline 8, and the emptying medium in the second waste discharge pipeline 8 is matched with the paint storage device 3 to suck the paint remained in the output pipeline 5 back into the paint storage device 3, so that the pre-emptying operation is completed; after the pre-evacuation is completed, the third switching valve FD is controlled to enable the first valve port to be communicated with the second valve port, and residual paint in the output pipeline 5 is purged to isolate the output pipeline 5 from the input pipeline 4.
Specifically, in the same way, in order to reduce the waste of the paint, before the input pipeline 4 is isolated, the input pipeline 4 is subjected to pre-evacuation operation, the cleaning air in the first isolation medium is injected into the input pipeline 4 through the first isolation unit, the paint storage device 3 is matched with the paint residual in the input pipeline 4 to be sucked back into the paint storage device 3, after the pre-evacuation operation is completed, the first switching valve F10 is controlled to enable the input pipeline 4 to be communicated with the first waste discharge pipeline 7, and the paint residual in the input pipeline 4 is purged, so that the external paint storage device 2 is isolated from the output pipeline 5.
Example 3
In some embodiments, a fourth switching valve F12 is disposed on the output pipeline 5 and near the third switching valve FD, the fourth switching valve F12 is connected to the third waste discharge pipeline 10, and the fourth switching valve F12 is used for switching the paint storage device 3 to communicate with the output pipeline 5 or the third waste discharge pipeline 10.
Specifically, when the paint spraying paint needs to be changed in color, the cleaning solvent in the cleaning unit has conductivity, so that a fourth switching valve F12 is provided, and when the paint storage device 3 needs to be cleaned, the fourth switching valve F12 is controlled to connect the output pipe orifice 5 with the third waste discharge pipeline 10, so that the solvent and the waste materials for cleaning the input pipeline 4 and the paint storage device 3 are discharged from the third waste discharge pipeline 10.
Example 4
In certain embodiments, the external paint storage device 2 comprises a plurality of paint storage modules 14 for storing paints of the same or different colours and a cleaning unit 13 for cleaning the paint supply circuit; the paint storage module 14 is provided with a one-way valve 15.
Specifically, the external paint storage device 2 can inject paint with different colors into the paint storage device 3 according to different spraying colors; specifically, the paint storage module 14 is provided with a one-way valve 15, so that the paint storage module 14 supplies paint to the paint storage device 3 in one way, and paint in the paint storage device 3 is prevented from flowing back.
Example 5
For the convenience of understanding by those skilled in the art, the specific control flow is as follows, taking fig. 1 as an example:
spraying a first paint supply loop:
firstly, before the atomizer 16 is electrified, paint is injected into a first paint supply loop and a paint discharge pipeline 1 through the external paint storage device 2, and air in the first paint supply loop and the paint discharge pipeline 1 is exhausted; subsequently, a second switching valve F11 is controlled to disconnect the paint storage device 3 from the output pipeline 5, the paint storage device 3 is a servo hydraulic cylinder, and the paint storage device 3 is matched with the external paint storage device 2 to perform oil suction operation;
in order to reduce the waste of paint during isolation, when the paint storage device 3 absorbs oil near to completion, the fifth switching valve F00 is controlled to disconnect the external paint storage device 2 from the paint storage device 3, meanwhile, the first conveying module F02 in the first isolation unit controls to inject a first isolation medium into the input pipeline 4, and at the moment, the paint storage device 3 is matched with the paint residual in the input pipeline 4 to suck the paint back into the paint storage device 3, so that the pre-emptying operation is completed; then, the first switching valve F10 is controlled to enable the input pipeline 4 to be communicated with the first waste discharge pipeline 7, a first isolation medium is continuously injected into the input pipeline 4, residual paint in the input pipeline 4 is discharged from the first waste discharge pipeline 7, and the external paint storage device 2 is isolated from the output pipeline 5;
energizing the atomizer 16, and controlling the output pipeline 5 of the first paint supply loop to be communicated with the paint discharge pipeline 1 by the first control device 6 for spraying; after spraying, the first control device 6 enables the output pipeline 5 to be communicated with the third waste discharge pipeline 10, the third switching valve FD enables the first valve port to be communicated with the third valve port, emptying medium is injected into the second waste discharge pipeline 8 through the third valve port, and the emptying medium in the second waste discharge pipeline 8 is matched with the paint storage device 3 to suck the paint left in the output pipeline 5 back into the paint storage device 3, so that pre-emptying operation is completed; after the pre-emptying is completed, the third switching valve FD is controlled to enable the first valve port to be communicated with the second valve port, and the second isolation medium of the second isolation unit discharges the residual paint in the output pipeline 5 into the recovery unit 9, so that the output pipeline 5 is isolated from the input pipeline 4.
While spraying, the first paint supply loop judges whether the second paint supply loop changes the color according to the next group of colors to be sprayed, and if not, the following steps are executed:
first, to prevent the first isolation medium in the input line 4 from being fed into the paint reservoir 3, the first switching valve F10 communicates the input line 4 with the first waste line 7 before paint is injected into the paint reservoir 3, the external paint reservoir 2 injects paint into the input line 4 and stops when the position sensor 11 senses paint, at which time the first isolation medium in the input line 4 is discharged from the first waste line 7; after the input pipeline 4 is emptied, the operations of oil suction, pre-emptying of the input pipeline 4, isolation of the input pipeline 4 and the like are carried out as the first paint supply loop;
then, the second switching valve F11 is controlled to enable the paint storage device 3 to be communicated with the output pipeline 5, the first control device 6 enables the output pipeline 5 to be communicated with the third waste discharge pipeline 10, at the moment, paint in the paint storage device 3 is pressed to the first control device 6, and air in the output pipeline 5 is discharged from the third waste discharge pipeline 10; when the first paint supply loop is completely sprayed, the first control device 6 enables the output pipeline 5 to be communicated with the paint discharge pipeline 1 for spraying; after the spraying is finished, the operation of pre-emptying the output pipeline 5, isolating the output pipeline 5 and the like is carried out as the first paint supply loop.
While spraying, the second paint supply loop judges whether the first paint supply loop changes colors according to the next group of colors to be sprayed, and if so, the following steps are executed:
firstly, the cleaning unit in the external paint storage device 2 cleans the input pipeline 4 and the paint storage device 3 of the first paint supply circuit, and the cleaning solvent in the cleaning unit 13 has conductivity, so that the fourth switching valve F12 enables the output pipeline 5 to be communicated with the third waste discharge pipeline 10, and the cleaned waste is discharged from the third waste discharge pipeline 10;
after the second paint supply loop is sprayed, the atomizer 16 is powered off, the first control device 6 controls the paint discharging pipeline 1 to be communicated with the output pipeline 5, and the second isolation unit is injected with a second isolation medium to clean the output pipeline 5, the paint discharging pipeline 1 and the atomizer 16; after the cleaning, the paint in the paint storage device 3 is pressed to the atomizer, the air in the output pipeline 5 and the paint discharge pipeline 1 is discharged, and after the air is discharged, the atomizer 16 is electrified to continue spraying.
When use is complete, the atomizer 16 is powered off, and the device is cleaned:
firstly, the cleaning unit in the external paint storage device 2 cleans the input pipeline 4 and the paint storage device 3 of the first paint supply loop and the second paint supply loop respectively, and simultaneously the second isolation medium of the second isolation unit cleans the output pipeline 5, the paint discharge pipeline 1 and the atomizer 16 of the two paint supply loops respectively, so that the two cleaning pipelines are ensured to be simultaneously carried out, the time is saved, and each pipeline is ensured to be cleaned.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (7)
1. A paint supply system for electrostatic painting of aqueous paint, comprising: at least two paint supply loops, a paint discharge pipeline (1), an isolation device (17) and a first control device (6); wherein:
each paint supply loop comprises a paint storage device (3), an input pipeline (4) and an output pipeline (5), wherein one end of the input pipeline (4) is communicated with an inlet of the paint storage device (3), and the other end of the input pipeline is connected with an external paint storage device (2); one end of the output pipeline (5) is communicated with an outlet of the paint storage device (3);
the output port of the isolation device (17) is used for being communicated with an input pipeline (4) and an output pipeline (5) in each paint supply loop and is used for:
after the paint is injected into the paint storage device (3) through the input pipeline in the paint supply loop, an isolation medium is injected into the input pipeline (4) so as to isolate the external paint storage device (2) from the output pipeline (5);
and injecting an isolating medium into the output pipeline (5) after the paint storage device (3) conveys paint to the paint discharge pipeline (1) so as to isolate the input pipeline (4) from the output pipeline (5); the paint storage device (3) is a servo hydraulic cylinder, the input pipeline (4) and the output pipeline (5) are thin spiral pipes, and when the paint storage device is in isolation, the isolation medium is clean air to isolate and purge the input pipeline (4) and the output pipeline (5), so that the paint storage device can be purged completely, and the waste of paint and the isolation medium is reduced;
the isolation device (17) comprises a first isolation unit and a second isolation unit; the first isolation unit is used for injecting a first isolation medium into the input pipeline, and the second isolation unit is used for injecting a second isolation medium into the output pipeline; the first isolation unit includes: the device comprises a first conveying module (F02) and a first waste discharge unit, wherein the output end of the first conveying module (F02) is connected with an isolation opening of the input pipeline (4), and the isolation opening is arranged on the side wall of the input pipeline (4) and is positioned between the external paint storage device (2) and the paint storage device (3); -the first delivery module (F02) controls the injection of the first isolating medium into the input line (4); the first waste discharge unit comprises a first switching valve (F10) and a first waste discharge pipeline (7) connected with the first switching valve (F10), wherein the first switching valve (F10) is arranged at one end of the input pipeline (4) close to the paint storage device (3) and is used for enabling the input pipeline (4) to be communicated with the paint storage device (3) or the first waste discharge pipeline (7);
the second isolation unit includes: the second conveying module (X11) and the second waste discharging unit are connected with a second switching valve (F11), and the second switching valve (F11) is arranged at one end of the output pipeline (5) close to the paint storage device (3) and is used for enabling the output pipeline (5) to be communicated with the paint storage device (3) or the second conveying module (X11); the second delivery module (X11) controls the injection of the second isolation medium into the output line (5); the second waste discharge unit comprises a second waste discharge pipeline (8) connected with the first control device (6), and the first control device (6) is also used for enabling the output pipeline (5) to be communicated with the second waste discharge pipeline (8) or the paint discharge pipeline (1);
the first control device (6) is used for controlling each paint supply loop to alternately communicate the output pipeline (5) with the paint discharge pipeline (1) so that each paint storage device (3) alternately outputs paint to the paint discharge pipeline (1).
2. A paint supply system for electrostatic painting of aqueous paint according to claim 1, wherein the paint supply circuit comprises two paint supply circuits, including a first circuit and a second circuit; the first control device (6) is used for controlling the output pipeline (5) of the first loop and the output pipeline (5) of the second loop to be alternately communicated with the paint discharging pipeline (1), so that the paint storing device (3) of the first loop and the paint storing device (3) of the second loop alternately output paint to the paint discharging pipeline (1).
3. A paint supply system for electrostatic painting of aqueous paint according to claim 2, wherein the paint supply circuit further comprises:
the third switching valve (FD) is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with one end of the second waste discharge pipeline (8) far away from the first control device (6), the second valve port is connected with a recovery unit (9) for recovering a second isolation medium and waste materials discharged by the output pipeline (5), and the third valve port is used for injecting an emptying medium into the second waste discharge pipeline (8); the third switching valve (FD) is configured to communicate the first valve port with the second valve port or a third valve port.
4. A paint supply system for electrostatic painting of aqueous paint according to claim 3, characterized in that a fourth switching valve (F12) is arranged on the output pipeline (5) and close to the third switching valve (FD), the fourth switching valve (F12) is connected with a third waste discharge pipeline (10), and the fourth switching valve (F12) is used for switching the paint storage device (3) to communicate with the output pipeline (5) or the third waste discharge pipeline (10).
5. A paint supply system for electrostatic painting of aqueous paint according to claim 1, characterized in that the first waste discharge line (7) is provided with a position sensor (11) close to the paint reservoir (3).
6. A paint supply system for electrostatic painting of aqueous paint according to claim 1, wherein the paint supply circuit further comprises:
the second control device (12), the input of second control device (12) with outside lacquer storage device (2) are connected, the output of second control device (12) respectively with two input pipeline (4) are connected, are used for controlling outside lacquer storage device (2) is in proper order to two input pipeline (4) carry paint vehicle.
7. A paint supply system for electrostatic painting of aqueous paint according to claim 6, characterized in that the external paint storage device (2) comprises a plurality of paint storage modules (14) for storing paints of the same or different colours and a washing unit (13) for washing the paint supply circuit; and the paint storage module (14) is provided with a one-way valve (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210919229.XA CN115228639B (en) | 2022-08-02 | 2022-08-02 | Paint supply system for electrostatic coating of water-based paint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210919229.XA CN115228639B (en) | 2022-08-02 | 2022-08-02 | Paint supply system for electrostatic coating of water-based paint |
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| CN115228639A CN115228639A (en) | 2022-10-25 |
| CN115228639B true CN115228639B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN88103065A (en) * | 1987-05-27 | 1988-12-14 | 贝尔工业设备有限公司 | Carry out the method and the device of electrostatic spraying with conductive material |
| CN101175576A (en) * | 2005-04-13 | 2008-05-07 | 伊利诺斯器械工程公司 | Spray coating applicator system |
| CN103025436A (en) * | 2010-07-21 | 2013-04-03 | 威士伯采购公司 | Electrostatic spray apparatus and method |
| CN205815978U (en) * | 2016-05-24 | 2016-12-21 | 四川晟翔晟智能科技有限公司 | A kind of coating electrostatic coating system |
| CN207025626U (en) * | 2017-07-26 | 2018-02-23 | 廊坊铭捷涂装技术有限公司 | Electrostatic spraying interval paint feeding system for highly conductive water paint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6062389B2 (en) * | 2014-03-31 | 2017-01-18 | 株式会社東芝 | Deposition equipment |
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2022
- 2022-08-02 CN CN202210919229.XA patent/CN115228639B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88103065A (en) * | 1987-05-27 | 1988-12-14 | 贝尔工业设备有限公司 | Carry out the method and the device of electrostatic spraying with conductive material |
| CN101175576A (en) * | 2005-04-13 | 2008-05-07 | 伊利诺斯器械工程公司 | Spray coating applicator system |
| CN103025436A (en) * | 2010-07-21 | 2013-04-03 | 威士伯采购公司 | Electrostatic spray apparatus and method |
| CN205815978U (en) * | 2016-05-24 | 2016-12-21 | 四川晟翔晟智能科技有限公司 | A kind of coating electrostatic coating system |
| CN207025626U (en) * | 2017-07-26 | 2018-02-23 | 廊坊铭捷涂装技术有限公司 | Electrostatic spraying interval paint feeding system for highly conductive water paint |
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| CN115228639A (en) | 2022-10-25 |
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