Visible light oxidation in-situ film forming testing device for coating

Abstract

The utility model relates to a coating visible light oxidation in-situ film forming testing device. Comprising more than two raw material gas tanks for containing different raw material gases, a gas storage tank for mixing and storing the gases, a vacuum pump which is connected with the gas storage tank through a pipeline and is used for discharging the gases in the gas storage tank, and a transparent test box body for placing a coating test plate to be tested, a first gas inlet pipe for conveying gas to the gas storage tank is connected between the gas storage tank and each raw material gas tank, and a gas conveying control device for respectively controlling each raw material gas tank and the gas storage tank to communicate and convey gas is arranged on the first gas inlet pipe; a second air inlet pipe is connected between the air storage tank and the test box body; and a control valve for controlling the opening and closing and the flow of the pipeline is arranged on the second air inlet pipe. The device is used for researching and testing different gas concentrations or simulating an air environment, and can be used for researching and testing a paint film state after oxidation film formation and drying film formation simultaneously under the action of visible light, and particularly can be used for coating film formation research of visible light oxidation-induced discoloration paint.

Description

Technical field:

[0001] The utility model relates to the technical field of coating testing, in particular to a coating visible light oxidation in-situ film-forming testing device. Background technology:

[0002] With the continuous development and advancement of science and technology, research on the film-forming mechanisms of coatings has matured. Currently, coating film-forming mechanisms primarily include physical drying, chemical reactions, and physicochemical processes. Physical drying refers to the process by which the coating solvent evaporates and transmits light, forming a film. Chemical reactions refer to the chemical reactions between reactive groups in the coating and substances on the surface or in the air to form a film. Physicochemical processes include both physical drying and chemical reactions.

[0003] As new productivity continues to meet consumer needs, the advent of innovative coatings presents a complex film-forming process. To evaluate coating film formation under visible light and different gas environments, a suitable device is needed to test the differences in in-situ film formation under these conditions. Currently, no relevant researchers have publicly reported on a testing device that can investigate the differences in coating film formation under different gas environments. Utility model content:

[0004] The utility model provides a coating visible light oxidation in-situ film-forming test device. The utility model can be used to study and test different gas concentrations or simulate air environments. Under the action of visible light, oxidation film formation and the state of the paint film after drying film formation occur simultaneously. It is particularly suitable for coating film formation research of visible light oxidation-induced color-changing paint.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A coating visible light oxidation in-situ film formation testing device comprises two or more raw gas tanks for containing different raw gas, a gas storage tank for mixing and storing gas, a vacuum pump connected to the gas storage tanks via pipelines for exhausting the gas in the gas storage tanks, and a transparent test box for placing a coating test plate to be tested; a first air inlet pipe for conveying gas to the gas storage tanks is connected between the gas storage tanks and each of the raw gas tanks, and the first air inlet pipe is provided with a conveying gas control device for separately controlling the conveying gas between each raw gas tank and the gas storage tank; a second air inlet pipe is connected between the gas storage tank and the test box, and the second air inlet pipe is provided with a control valve for controlling the opening and closing of the pipe and the flow rate; the gas storage tank is also provided with a pressure transmitter for detecting the pressure of the gas storage tank.

[0007] This solution can control the proportion and total amount of gas entering the gas tank, and thus the proportion and total amount of gas in a transparent test box connected to the gas tank. Therefore, it is possible to test the coating test panel to be tested in the transparent test box under different gas concentrations or simulated air environments, and test the state of the paint film after oxidation film formation and drying film formation under the action of visible light. It is particularly suitable for coating film formation research of visible light oxidative discoloration coatings.

[0008] Furthermore, in order to improve the sealing performance of the test box, the upper portion of the test box is connected to the second air inlet pipe via a single-hole rubber plug.

[0009] Furthermore, in order to facilitate the insertion of the coating test board: a plurality of U-shaped grooves with notches facing upwards for inserting the coating test board are arranged at intervals along the transverse direction on the bottom of the test box.

[0010] Furthermore, an air outlet that can be opened and closed is provided on the side wall of the test box.

[0011] Furthermore, the gas delivery control device includes a multi-way valve and two or more pressure reducing valves. The first air inlet pipe includes a main pipe connected between the multi-way valve and the gas storage tank, and branch pipes respectively connected between each raw gas tank and the multi-way valve. The pressure reducing valves are respectively arranged on each branch pipe to adjust the outlet pressure of the corresponding raw gas tank. The multi-way valve is used to control the connection between different branch pipes and the main pipe.

[0012] The multi-way valve can be used to control the flow of gas from a certain gas tank to the gas storage tank.

[0013] The pressure transmitter can be used to detect the gas pressure in the gas storage tank, so as to adjust and control the ratio of different gas amounts fed into the gas storage tank through the pressure transmitter.

[0014] The beneficial effects of the present invention are as follows: (1) the coating visible light oxidation in-situ film-forming test device described in the present invention is easy to build, simple and quick to operate, and has high efficiency in parallel experimental testing; (2) the coating visible light oxidation in-situ film-forming test device described in the present invention can freely adjust the ratio of the mixed gas, and further explore the effects of different gas concentrations or simulated air environments on the coating visible light oxidation in-situ film-forming, etc. Description of the drawings:

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 1Explanation of the winning bid number: 1. Raw gas tank; 4. Pressure reducing valve; 5. Air guide tube; 6. Vacuum pump; 7. Multi-way valve; 8. Rubber tube; 9. Pressure transmitter; 10. Gas storage tank; 11. Control valve; 12. U-shaped groove; 13. Single-hole rubber plug; 14. Test box; 15. Coating test board; 16. Air outlet. Specific implementation method:

[0017] The following describes the specific implementation of the present invention in detail with reference to the accompanying drawings. The specific implementation method described here is only used to illustrate and explain the present invention and is not intended to limit the present invention.

[0018] Example 1

[0019] A coating visible light oxidation in-situ film formation testing device comprises two or more raw gas tanks 1 for containing different raw gas, a gas storage tank 10 for mixing and storing gas, a vacuum pump 6 connected to the gas storage tank 10 through a pipeline for exhausting the gas in the gas storage tank 10, and a transparent test box 14 for placing a coating test plate 15 to be tested; a first air inlet pipe 5-1 for conveying gas to the gas storage tank 10 is connected between the gas storage tank 10 and each raw gas tank 1, and the first air inlet pipe 5-1 is provided with a conveying gas control device for separately controlling the communication between each raw gas tank 1 and the gas storage tank 10 for conveying gas; a second air inlet pipe 5-2 is connected between the gas storage tank 10 and the test box 14, and the second air inlet pipe 5-2 is provided with a control valve 11 for controlling the opening and closing and flow rate of the pipe; the gas storage tank 10 is also provided with a pressure transmitter 9 for detecting the pressure of the gas storage tank 10.

[0020] In order to improve the sealing performance of the test box in this embodiment, the upper portion of the test box 14 is connected to the second air inlet pipe 5 - 2 via a single-hole rubber plug 13 .

[0021] In this embodiment, a plurality of U-shaped grooves 12 with upwardly facing notches are provided at intervals along the transverse direction on the bottom of the test box 14 for inserting the coating test board 15 .

[0022] The side wall of the test box 14 in this embodiment is provided with an air outlet 16 that can be opened and closed.

[0023] The gas delivery control device of this embodiment includes a multi-way valve 7 and two or more pressure reducing valves 4. The first air inlet pipe 5-1 includes a main pipe connected between the multi-way valve 7 and the gas storage tank 10, and branch pipes respectively connected between each raw gas tank 1 and the multi-way valve 7. The pressure reducing valves 4 are respectively set on each branch pipe to adjust the outlet pressure of the corresponding raw gas tank 1. The multi-way valve 7 is used to control the connection between different branch pipes and the main pipe.

[0024] The multi-way valve 7 can be used to control the flow of gas from a certain gas tank to the gas storage tank.

[0025] The pressure transmitter 9 can be used to detect the gas pressure in the gas storage tank, so as to adjust and control the ratio of different gas amounts fed into the gas storage tank through the pressure transmitter.

[0026] The second air intake pipe 5 - 2 described in this embodiment is provided with a control valve 11 .

[0027] Specifically, the first air inlet pipe 5-1 and the second air inlet pipe 5-2 are polytetrafluoroethylene air pipes with an inner diameter of 2 mm and an outer diameter of 4 mm. The vacuum pump 6 and the gas storage tank 10 are connected by a rubber tube 8. The rubber tube 8 is a silicone rubber hose with an inner diameter of 8 mm and an outer diameter of 10 mm. The gas storage tank 10 is a steel gas storage tank that can withstand a maximum pressure of 5 bar. The test box 14 is an acrylic test box.

[0028] The working process of this embodiment is:

[0029] First, the gas in the gas storage tank 10 is evacuated to a vacuum state by the vacuum pump 6, that is, the pressure transmitter 9 reads zero. After the reading is stable for 10 minutes, the vacuum pump 6 is turned off to maintain the vacuum state of the gas storage tank 10. Secondly, the air pipe 5-1 connected between the nitrogen bottle 1 and the multi-way valve 7 is connected to the air pipe 5-1 connected between the gas storage tank 10 and the multi-way valve 7 by adjusting the multi-way valve 7. The pressure reducing valve 4 provided on the air pipe 5-1 between the nitrogen bottle 1 and the multi-way valve 7 is slowly opened to allow the nitrogen gas in the nitrogen bottle 1 to enter the gas storage tank 10 through the air pipe 5-1. After the pressure transmitter 9 shows 1 bar, close the pressure reducing valve 4 and stop delivering nitrogen gas; then adjust the multi-way valve 7 to connect the air pipe 5-1 connected between the oxygen cylinder 2 and the multi-way valve 7 with the air pipe 5 connected between the gas storage tank 10 and the multi-way valve 7, slowly open the pressure reducing valve 4 on the air pipe 5-1 between the oxygen cylinder 2 and the multi-way valve 7, and let the oxygen gas in the oxygen cylinder 2 enter the gas storage tank 10 through the air pipe 5-1. After the pressure transmitter 9 shows 2 bar, close the pressure reducing valve 4 and stop delivering oxygen gas; then adjust the pressure reducing valve 4 to connect the oxygen cylinder 2 and the multi-way valve 7. The multi-way valve 7 connects the air pipe 5-1 connected between the argon cylinder 3 and the multi-way valve 7 with the air pipe 5-1 connected between the gas storage tank 10 and the multi-way valve 7, and slowly opens the pressure reducing valve 4 to allow the argon gas in the argon cylinder 3 to enter the gas storage tank 10 through the air pipe 5-1. After the pressure transmitter 9 shows 3 bar, the pressure reducing valve 4 is closed to stop the supply of argon gas, that is, a mixed gas of nitrogen: oxygen: argon with a ratio of 1:1:1 is obtained in the gas storage tank 10; then, the three parallel comparison coating test panels 15 just made are placed in the test box 14. Immediately after the three U-shaped grooves 12 are formed, the test box 14 is closed; then, the air outlet 16 is opened and the control valve 11 is slowly opened to allow the mixed gas in the gas tank 10 to enter the test box 14 through the air duct 5. After ventilation for 1 minute, all the air in the test box 14 is driven out by the mixed gas. Then, the control valve 11 is adjusted to reduce the gas flow rate, and the changes in the coating film formation process in the test box 14 can be observed; finally, after the coating is completely dried and formed, the control valve 11 is closed, the test box 14 is opened, the coating test plate 15 is taken out, and the comparative experimental results are recorded.

[0030] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A coating visible light oxidation in-situ film formation testing device, characterized by: The invention comprises two or more raw gas tanks (1) for containing different raw gas, a gas storage tank (10) for mixing and storing gas, a vacuum pump (6) connected to the gas storage tank (10) through a pipeline for discharging gas in the gas storage tank (10), and a transparent test box (14) for placing a coating test plate (15) to be tested; a first air inlet pipe (5-1) for conveying gas to the gas storage tank (10) is connected between the gas storage tank (10) and each of the raw gas tanks (1), and a conveying gas control device for controlling the communication between each raw gas tank (1) and the gas storage tank (10) is provided on the first air inlet pipe (5-1); a second air inlet pipe (5-2) is connected between the gas storage tank (10) and the test box (14), and a control valve (11) for controlling the opening and closing of the pipe and the flow rate is provided on the second air inlet pipe (5-2); and a pressure transmitter (9) for detecting the pressure of the gas storage tank (10) is also provided on the gas storage tank (10).

2. The coating visible light oxidation in-situ film formation testing device according to claim 1, characterized in that: The upper portion of the test box (14) is connected to the second air inlet pipe (5-2) via a single-hole rubber plug (13).

3. The coating visible light oxidation in-situ film formation testing device according to claim 1, characterized in that: The bottom of the test box (14) is provided with a plurality of U-shaped grooves (12) with notches facing upwards for inserting the coating test plate (15) at intervals along the transverse direction.

4. The coating visible light oxidation in-situ film formation testing device according to claim 1, characterized in that: An air outlet (16) that can be opened and closed is provided on the side wall of the test box (14).

5. The coating visible light oxidation in-situ film formation testing device according to claim 1, characterized in that: The gas delivery control device comprises a multi-way valve (7) and two or more pressure reducing valves (4); the first air inlet pipe (5-1) comprises a main pipe connected between the multi-way valve (7) and the gas storage tank (10), and branch pipes respectively connected between each raw gas tank (1) and the multi-way valve (7); each pressure reducing valve (4) is respectively arranged on each branch pipe for adjusting the outlet pressure of the corresponding raw gas tank (1); and the multi-way valve (7) is used to control the connection between different branch pipes and the main pipe.

Images