Apparatus and method for accelerated testing of the weathering resistance of a coating material

Abstract

The application discloses an accelerated testing device and method for aging resistance of coating material, and relates to the field of aging testing.The accelerated testing device for aging resistance of coating material carries out solid-liquid separation on waste liquid through a filter plate, intercepts coating debris and solid impurity particles falling off in a testing process, avoids solid impurities from entering a circulating pipeline to cause pipeline blockage, absorbs organic impurities, pigments and trace oil stains in the waste liquid through activated carbon rods filled in an inner bottom support frame, realizes waste liquid purification, stably supports the carbon rod structure through a bottom filter plate, prevents carbon rod breakage and debris from flowing out with liquid, avoids secondary pollution of circulating liquid, divides and slows down high-pressure input water flow through a slanted baffle and an inner slanted plate in cooperation with a groove at the bottom of the slanted baffle, changes a high-pressure direct injection mode of a traditional device, avoids problems of nozzle blockage and uneven jet flow caused by direct impact of high-pressure water flow on an atomizing nozzle, and guarantees continuous and stable operation of a spraying operation.

Description

Technical Field

[0001] This invention specifically relates to an accelerated testing device and method for the aging resistance of coating materials, and pertains to the field of aging testing. Background Technology

[0002] Coating materials are widely used in many fields such as machinery, building materials, automobiles and aerospace. Their aging resistance directly determines the service life, protective effect and safety of the workpiece. Therefore, accelerated aging resistance testing of coatings is the core process of material performance testing. A salt spray testing device with constant temperature and humidity, disclosed in CN104535484B, includes a housing, a testing chamber, a humidifier, a cooling device, a heater, an evaporator, a water tank, a circulation device, a salt spray generator, and a driving device. This invention is rationally designed. Firstly, the cooperation between the salt spray generator and the circulation device allows the salt spray to corrode three-dimensional objects uniformly and comprehensively, and the height of the salt spray generator can be precisely adjusted. Secondly, the entire device possesses the necessary structure for constant temperature and humidity, allowing corrosion testing conditions to be set to the required scenarios, more closely resembling real-world environments. Furthermore, this invention has excellent drainage and overflow structures, ensuring the safety of the equipment and demonstrating excellent salt spray conservation capabilities. In existing equipment, the sample support structure of traditional testing devices is mostly horizontal and flat, which makes it easy for spray liquid to accumulate on the sample surface, forming a pooled liquid. This makes it impossible to achieve a comprehensive rinsing of the spray medium, resulting in uneven local aging tests of the coating and large deviations in test results. Furthermore, the rigid support structure is prone to scratching the surface of the coating under test, causing secondary damage to the sample and interfering with the test data. Summary of the Invention

[0003] To address the aforementioned problems, a technical solution is proposed: an accelerated testing device for the aging resistance of coating materials, comprising: The testing box has a spray mechanism installed on the top of both sides, a bottom pad mechanism installed inside the testing box, and a support mechanism installed on the top of the bottom pad mechanism. A first liquid pump and a second liquid pump are installed on the outside of the detection box. A water tank is installed on the outside of the detection box, and a door is provided on the outside of the detection box. The inlet of the first liquid pump is connected to the bottom of the water tank through a pipe, and the outlet of the first liquid pump is connected to the spraying mechanism through a pipe. The inlet of the second liquid pump is connected to the bottom pad mechanism through a pipe, and the outlet of the second liquid pump is connected to the top of the water tank through a pipe. The support mechanism includes a fixed plate, on the top of which a support plate is fixedly mounted. The support plate is uniformly mounted axially on the top of the fixed plate, and a side support plate is fixedly mounted on the outer side of the support plate. The side support plate is uniformly mounted axially on the outer side of the support plate, and the top of the support plate is inclined away from the side support plate. A rubber pad is fixedly mounted on the inclined surface of the top of the support plate near the side support plate. The outer side of the rubber pad is uniformly provided with protrusions. The top of the side support plate near the inclined surface of the support plate is also inclined. Through the cooperation of the support plate and the side support plate, the coating sample to be tested is fixed in an inclined manner. The single-sided inclined structure of the support plate allows the non-test surface of the sample to fit against the support structure, allowing the test surface of the sample to be fully exposed and receive the full rinsing of the sprayed liquid, avoiding the problem of liquid residue on the sample surface, ensuring uniformity in the coating surface aging test, and improving the accuracy of the test data. The inclined surface of the side support plate is parallel to the inclined surface of the support plate, and a rubber pad is fixedly mounted on the inclined surface of the side support plate.

[0004] Preferably, the base mechanism includes a base support plate, which is fixedly installed on the bottom of the inner wall of the testing chamber. Both ends of the base support plate are inclined downwards. Frame grooves are evenly distributed on the inclined bends on both sides of the top of the base support plate, and through grooves are evenly distributed on both sides of the bottom of the base support plate, communicating with the frame grooves. A filter plate is fixedly installed in the frame groove of the base support plate. The filter plate performs solid-liquid separation of the waste liquid, intercepting coating debris and solid impurity particles that fall off during the testing process, preventing solid impurities from entering the circulation pipeline and causing blockage. Activated carbon is filled inside the base support frame. Carbon rods adsorb organic impurities, pigments, and trace amounts of oil in wastewater, achieving wastewater purification. A bottom filter plate stably supports the carbon rod structure, preventing breakage and debris from flowing out with the liquid and avoiding secondary pollution of the circulating liquid. The top of the filter plate is flush with the top of the bottom support plate. Side baffles are fixedly installed on the top of the bottom support plate, symmetrically installed along the center of the bottom support plate's axis, and evenly spaced grooves are formed at the bottom of each side baffle. The side baffles are located between the filter plates. Bottom support frames are fixedly installed on both sides of the bottom of the bottom support plate, and the bottom support frames are connected to the bottom support plate. Corresponding to the groove position, a bottom filter plate is fixedly installed on the bottom of the inner wall of the bottom support frame. Carbon rods, made of activated carbon material, are stacked and filled between the top of the bottom filter plate and the bottom of the bottom support plate. A connecting pipe is fixedly installed at the bottom of the bottom support frame, and the connecting pipe is evenly installed axially at the bottom of the bottom support frame. An oil removal tank is fixedly installed at the end of the connecting pipe away from the bottom support frame. An inner baffle is fixedly installed on the inner wall of the oil removal tank, and the inner baffle is symmetrically installed along the center of the axis of the oil removal tank. A groove is opened at the bottom of the inner baffle, and the non-phase of the inner baffle... Side floats are slidably installed on both sides. The internal baffle inside the oil removal tank can buffer and divert the incoming waste liquid, reduce the liquid flow rate, and provide sufficient time for trace amounts of oil in the waste liquid to float and settle, thus achieving oil-liquid separation. The grooves at the bottom of the internal baffle can ensure the normal flow of clean liquid at the bottom. Combined with the self-adaptive floating side floats, they can block floating oil on the top layer, complete the oil removal and purification of the waste liquid, and improve the cleanliness of the circulating liquid. A drain pipe is fixedly installed at the center of the outside of the oil removal tank. The end of the drain pipe away from the oil removal tank is connected to the inlet of the second liquid pump through a pipe.

[0005] Preferably, the spraying mechanism includes a fixed chamber, which is fixedly installed on both sides of the inner wall of the detection chamber. A fixed pipe is fixedly installed on the outer side of the fixed chamber. The end of the fixed pipe away from the fixed chamber is connected to the outlet of the first liquid pump through a pipe. An end cover plate is fixedly installed on the side of the fixed chamber away from the fixed pipe. An atomizing nozzle is fixedly installed on the inner wall of the end cover plate. An inclined baffle and an inner inclined plate are fixedly installed on the inner wall of the fixed chamber. Both the inclined baffle and the inner inclined plate are inclined from top to bottom towards the side away from the fixed pipe. The bottom of the inclined baffle is evenly provided with notches. The inner inclined plate is located on the side of the inclined baffle away from the fixed pipe. The top of the inner inclined plate does not contact the outer side of the inclined baffle. The distance between the baffle and the inclined plate gradually increases from top to bottom. Through the inclined plate and the inner inclined plate, and with the notch at the bottom of the inclined baffle, the high-pressure input water flow can be diverted and slowed down, changing the high-pressure direct injection mode of the traditional device. This avoids problems such as nozzle blockage and uneven water flow caused by the direct impact of high-pressure water flow on the atomizing nozzle, ensuring continuous and stable operation of the spraying operation. An inner support frame is fixedly installed on the inner wall of the fixed chamber. The inner support frame is located on the side of the inner inclined plate away from the inclined baffle. A first filter plate is fixedly installed on the inner wall of the inner support frame. A second filter plate is fixedly installed on the inner wall of the fixed chamber. The second filter plate is located between the first filter plate and the end cover plate, and there is a gap between the second filter plate and the first filter plate.

[0006] A method for using an accelerated testing device for the aging resistance of coating materials comprises the following steps: S1. Material fixing: The plate coated with the coating material is placed in the testing box and fixed by the support mechanism, so that the side of the plate coated with the coating material is tilted upward to guide the sprayed salt spray water flow. S2. Salt spraying: The first liquid pump drives the salt water in the water tank to enter the spraying mechanism through the pipeline, and the spraying mechanism atomizes the salt water and sprays it onto the coating surface of the board to carry out salt spray corrosion detection. S3. Saltwater diversion: The support mechanism and the bottom pad mechanism work together to divert and collect the salt spray water after spraying. S4. Brine circulation: The collected brine is filtered through a bottom pad mechanism to remove foreign matter and oil. Then, it is pumped into a water tank by a second liquid pump for reuse.

[0007] In S1, the board must be fixed firmly and the coating surface must be fully exposed within the spray coverage area of ​​the spraying mechanism without any blind spots. In S2, the spraying mechanism must ensure uniform salt spray atomization and stable spray intensity.

[0008] This invention provides an accelerated testing device for the aging resistance of coating materials, which has the following beneficial effects: (i) By using the support plate and the side support plate together, the coating sample to be tested is fixed in an inclined manner. The single-sided inclined structure of the support plate allows the non-test surface of the sample to fit into the support structure, so that the test surface of the sample is fully exposed and can receive the full rinsing of the sprayed liquid, avoiding the problem of liquid residue on the sample surface, ensuring uniformity of the coating surface aging test, and improving the accuracy of the test data.

[0009] (ii) The internal baffle inside the oil removal tank can buffer and divert the incoming waste liquid, reduce the liquid flow rate, and provide sufficient time for the trace oil in the waste liquid to float and settle, thereby achieving oil-liquid separation. The groove at the bottom of the internal baffle can ensure the normal flow of clean liquid at the bottom. Combined with the self-adaptive floating side plate, it can block the floating oil on the top layer, complete the oil removal and purification of the waste liquid, and improve the cleanliness of the circulating liquid.

[0010] (III) Solid-liquid separation of waste liquid is achieved by using a filter plate to intercept coating debris and solid impurity particles that fall off during the test, preventing solid impurities from entering the circulation pipeline and causing pipeline blockage. The activated carbon rods filled inside the bottom support frame adsorb organic impurities, pigments and trace amounts of oil in the waste liquid, thereby purifying the waste liquid. The bottom filter plate can stably support the carbon rod structure, preventing carbon rod breakage and debris from flowing out with the liquid and avoiding secondary pollution of the circulating liquid.

[0011] (iv) By using the inclined baffle and the inner inclined plate, in conjunction with the notch at the bottom of the inclined baffle, the high-pressure input water flow can be diverted and slowed down, changing the high-pressure direct injection mode of the traditional device, avoiding problems such as nozzle blockage and uneven water flow caused by the direct impact of high-pressure water flow on the atomizing nozzle, and ensuring the continuous and stable operation of the spraying operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall internal structure of the present invention; Figure 4 This is a schematic diagram of the support mechanism of the present invention; Figure 5 This is a partial structural schematic diagram of the support mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the base pad mechanism of the present invention; Figure 7 This is a partial structural schematic diagram of the base pad mechanism of the present invention; Figure 8 This is a partial sectional view of the bottom pad mechanism of the present invention; Figure 9 This is a schematic diagram of the spray mechanism of the present invention; Figure 10This is a sectional view of the spray mechanism of the present invention; Figure 11 This is a schematic diagram illustrating the method of using the present invention.

[0013] In the diagram: 1. Detection box; 2. Spraying mechanism; 3. Base pad mechanism; 4. Support mechanism; 5. First liquid pump; 6. Second liquid pump; 7. Water tank; 21. Fixed chamber; 22. Fixed pipe; 23. End cover plate; 24. Atomizing nozzle; 25. Inclined baffle; 26. Inner inclined plate; 27. Inner support frame; 28. First filter plate; 29. ​​Second filter plate; 31. Base support plate; 32. Side baffle; 33. Filter plate; 34. Carbon rod; 35. Base support frame; 36. Oil removal tank; 37. Bottom filter plate; 38. Drain pipe; 39. Connecting pipe; 310. Inner baffle; 311. Side floating plate; 41. Fixed plate; 42. Support plate; 43. Side support plate; 44. Rubber pad; 45. Rubber pad plate. Detailed Implementation

[0014] Example 1, Reference Figures 1 to 5 The present invention provides the following technical solution: An accelerated testing device for the aging resistance of coating materials, comprising: The test box 1 has a spray mechanism 2 installed on the top of both sides of the test box 1, a bottom pad mechanism 3 installed inside the test box 1, and a support mechanism 4 installed on the top of the bottom pad mechanism 3. The first liquid pump 5 and the second liquid pump 6 are both installed on the outside of the detection box 1. A water tank 7 is installed on the outside of the detection box 1, and a door is provided on the outside of the detection box 1. The inlet of the first liquid pump 5 is connected to the bottom of the water tank 7 through a pipe, and the outlet of the first liquid pump 5 is connected to the spray mechanism 2 through a pipe. The inlet of the second liquid pump 6 is connected to the bottom pad mechanism 3 through a pipe, and the outlet of the second liquid pump 6 is connected to the top of the water tank 7 through a pipe. The support mechanism 4 includes a fixed plate 41, with a support plate 42 fixedly installed on top of the fixed plate 41. The support plate 42 is evenly installed axially on the top of the fixed plate 41, and a side support plate 43 is fixedly installed on the outer side of the support plate 42. The side support plate 43 is evenly installed axially on the outer side of the support plate 42, with the top of the support plate 42 inclined away from the side support plate 43. A rubber pad 45 is fixedly installed on the inclined surface of the top of the support plate 42 near the side support plate 43. The operator places the coating material sample to be tested on top of the fixed plate 41. The evenly distributed support plates 42 and side support plates 43 support the bottom of the sample. The unilaterally inclined structure of the top of the support plate 42 contacts the non-test surface of the sample, and the sample is placed and fixed in an inclined state. The sample surface is thoroughly rinsed by subsequent spraying liquid to avoid liquid residue affecting the test results. The side support plate 43 on the outside of the support plate 42 is simultaneously matched and limited. The inclined surface of the side support plate 43 is parallel to the inclined surface of the support plate 42 and fits against the bottom of the outer side of the sample. The outer side of the rubber pad 45 is uniformly provided with protrusions. The top of the side support plate 43 near the inclined surface of the support plate 42 is also inclined, and the inclined surface of the side support plate 43 is parallel to the inclined surface of the support plate 42. The rubber pad 45 and its outer protrusions at the inclined surface of the support plate 42, together with the rubber pad 44 at the inclined surface of the side support plate 43, fix the tilted test sample plate to prevent the material from shifting and to prevent the hard structure from scratching the coating on the sample surface. The rubber pad 44 is fixedly installed at the inclined surface of the side support plate 43.

[0015] Example 2, based on Example 1, with reference to Figures 6 to 10The bottom support mechanism 3 includes a bottom support plate 31, which is fixedly installed on the bottom of the inner wall of the test box 1. Both ends of the bottom support plate 31 are inclined downwards. Frame grooves are evenly provided on the inclined bends on both sides of the top of the bottom support plate 31. Through grooves are evenly provided on both sides of the bottom of the bottom support plate 31, and these through grooves communicate with the frame grooves. Filter plates 33 are fixedly installed in the frame grooves of the bottom support plate 31. The top of the filter plates 33 is flush with the top of the bottom support plate 31. Side baffles 32 are fixedly installed on the top of the bottom support plate 31. The side baffles 32 are symmetrically installed along the center of the axis of the bottom support plate 31, and notches are evenly provided on the bottom of the side baffles 32. The side baffles 32 are located between the filter plates 33. Both sides of the bottom of the support plate 31 are fixedly installed with bottom support frames 35. After the sample is fixed, the first liquid pump 5 is started. The first liquid pump 5 draws the test liquid from the bottom of the water tank 7 through the pipeline, and then transports the liquid to the fixed pipe 22 through the liquid outlet pipeline. The liquid is introduced into the fixed chamber 21 through the fixed pipe 22. After the liquid enters the fixed chamber 21, it can be diverted and slowed down by the notch at the bottom of the inclined baffle 25 to avoid the high-pressure water flow directly impacting the nozzle and causing blockage or uneven spraying. The liquid that has been guided passes through the gap between the inner inclined plate 26 and the inclined baffle 25 and enters the area of ​​the inner support frame 27. The first filter plate 28 on the inner wall of the inner support frame 27 completes the initial impurity filtration and traps the impurities. To intercept particulate impurities in the liquid, the bottom support frame 35 and the bottom support plate 31 have corresponding groove positions. A bottom filter plate 37 is fixedly installed on the bottom of the inner wall of the bottom support frame 35. Carbon rods 34, made of activated carbon material, are stacked and filled between the top of the bottom filter plate 37 and the bottom of the bottom support plate 31. A connecting pipe 39 is fixedly installed on the bottom of the bottom support frame 35. The connecting pipe 39 is evenly installed axially on the bottom of the bottom support frame 35, and an oil removal tank 36 is fixedly installed at the end of the connecting pipe 39 away from the bottom support frame 35. An inner baffle 310 is fixedly installed on the inner wall of the oil removal tank 36. The inner baffle 310 is symmetrically installed at the center position of the axis of the oil removal tank 36. The liquid after the initial filtration enters... The liquid test medium enters the gap between the first filter plate 28 and the second filter plate 29. After secondary fine filtration by the second filter plate 29, it is delivered to the atomizing nozzle 24 inside the end cover plate 23. The atomizing nozzle 24 atomizes the liquid test medium and sprays it evenly onto the surface of the coating sample inside the test chamber 1. It continuously simulates aging environments such as rain and humid corrosion to conduct accelerated aging tests on the coating material. The bottom of the inner baffle 310 is provided with a groove, and the non-opposing surfaces of the inner baffle 310 are all slidably installed with side floating plates 311. A drain pipe 38 is fixedly installed at the center of the outer side of the oil removal tank 36. The end of the drain pipe 38 away from the oil removal tank 36 is connected to the inlet of the second liquid pump 6 through a pipe.

[0016] The spraying mechanism 2 includes a fixed chamber 21, which is fixedly installed on both sides of the inner wall of the test chamber 1. A fixed pipe 22 is fixedly installed on the outer side of the fixed chamber 21. The end of the fixed pipe 22 away from the fixed chamber 21 is connected to the outlet of the first liquid pump 5 through a pipe. An end cover plate 23 is fixedly installed on the side of the fixed chamber 21 away from the fixed pipe 22. The waste liquid generated by the spraying test drips onto the top of the bottom support plate 31. The downward tilting structure at both ends of the bottom support plate 31 guides the waste liquid to flow to both sides. When the waste liquid flows over the top of the bottom support plate 31, the notch at the bottom of the side baffle 32 can block large foreign objects. The waste liquid contacts the filter plate 33 through the frame grooves on both sides of the bottom support plate 31. The filter plate 33 is flush with the top of the bottom support plate 31. Solid-liquid separation can be performed on waste liquid, intercepting coating debris and impurity particles that have detached from the waste liquid. After the initial filtration, the waste liquid flows into the bottom support frame 35 through the through channel connected to the frame trough. After entering the bottom support frame 35, the waste liquid flows through the area of ​​stacked carbon rods 34. The activated carbon rods 34 can adsorb organic impurities and pigments in the waste liquid. The bottom filter plate 37 supports the carbon rods 34 and ensures that the purified liquid flows smoothly downward, preventing carbon rod debris from flowing out with the liquid. The inner wall of the end cover plate 23 is fixedly installed with an atomizing nozzle 24. The inner wall of the fixed chamber 21 is fixedly installed with an inclined baffle 25 and an inner inclined plate 26. The inclined baffle 25 and the inner inclined plate 26 are both inclined from top to bottom away from the fixed pipe 22. Furthermore, the bottom of the inclined baffle 25 is evenly provided with notches. The inner inclined plate 26 is located on the side of the inclined baffle 25 away from the fixed pipe 22. The top of the inner inclined plate 26 does not contact the outer side of the inclined baffle 25, and the distance between the inner inclined plate 26 and the inclined baffle 25 gradually increases from top to bottom. The inner wall of the fixed chamber 21 is fixedly installed with an inner support frame 27. The liquid purified by adsorption is uniformly transported to the oil removal tank 36 through the connecting pipe 39 at the bottom of the bottom support frame 35. The inner baffles 310 symmetrically arranged inside the oil removal tank 36 can buffer and divert the liquid, reduce the liquid flow rate, and cause the trace oil residue in the waste liquid to float to the top layer. The grooves at the bottom of the inner baffle 310 ensure normal flow of the liquid at the bottom layer. The side floating plate 311 can adjust according to the liquid level. The height-adaptive floating mechanism blocks top-level oil stains and completes waste liquid purification. After the waste liquid is purified inside the oil removal tank 36, the second liquid pump 6 is started. The second liquid pump 6 is connected to the drain pipe 38 in the center of the oil removal tank 36 through the liquid inlet pipe to extract the clean liquid after oil removal and purification, and then transport the liquid back to the top of the water tank 7 through the liquid outlet pipe to realize the recycling of the test liquid. The inner support frame 27 is located on the side of the inner inclined plate 26 away from the inclined baffle 25. The inner wall of the inner support frame 27 is fixedly installed with the first filter plate 28, and the inner wall of the fixed chamber 21 is fixedly installed with the second filter plate 29. The second filter plate 29 is located between the first filter plate 28 and the end cover plate 23, and there is a gap between the second filter plate 29 and the first filter plate 28.

[0017] Example 3, based on Examples 1 and 2, with reference to Figure 11A method for using an accelerated testing device for the aging resistance of a coating material comprises the following steps: S1. Material fixing: The plate coated with the coating material is placed in the testing box and fixed by the support mechanism, so that the side of the plate coated with the coating material is tilted upward to guide the sprayed salt spray water flow. S2. Salt spraying: The first liquid pump drives the salt water in the water tank to enter the spraying mechanism through the pipeline, and the spraying mechanism atomizes the salt water and sprays it onto the coating surface of the board to carry out salt spray corrosion detection. S3. Saltwater diversion: The support mechanism and the bottom pad mechanism work together to divert and collect the salt spray water after spraying. S4. Brine circulation: The collected brine is filtered through a bottom pad mechanism to remove foreign matter and oil. Then, it is pumped into a water tank by a second liquid pump for reuse.

[0018] In S1, the board must be fixed firmly and the coating surface must be fully exposed within the spray coverage area of ​​the spraying mechanism without any blind spots. In S2, the spraying mechanism must ensure uniform salt spray atomization and stable spray intensity.

[0019] In the support mechanism 4, the operator places the coating material sample to be tested on the top of the fixed plate 41. The support plates 42 and side support plates 43, which are evenly distributed on the top, support the bottom of the sample. The structure of the top of the support plate 42, which is inclined to one side, contacts the non-test surface of the sample. The sample is placed and fixed in an inclined state, which facilitates the subsequent spraying of liquid to fully wash the sample surface and avoids liquid residue from affecting the test results. The side support plates 43 on the outside of the support plate 42 cooperate to limit the movement. The inclined surface of the side support plate 43 is parallel to the inclined surface of the support plate 42 and fits against the bottom of the outside of the sample. The rubber pad 45 and its outer protrusion at the inclined surface of the support plate 42 cooperate with the rubber pad 44 at the inclined surface of the side support plate 43 to fix the inclined test sample plate, prevent the material from shifting, and prevent the hard structure from scratching the coating on the sample surface.

[0020] In the base pad mechanism 3, after the sample is fixed, the first liquid pump 5 is started. The first liquid pump 5 draws the test liquid from the bottom of the water tank 7 through the pipeline, and then transports the liquid to the fixed pipe 22 through the liquid outlet pipeline. The liquid is introduced into the fixed chamber 21 through the fixed pipe 22. After the liquid enters the fixed chamber 21, it can be diverted and slowed down by the notch at the bottom of the inclined baffle 25 to avoid the high-pressure water flow directly impacting the nozzle and causing blockage or uneven spraying. The liquid that has been guided passes through the gap between the inner inclined plate 26 and the inclined baffle 25 and enters the inner support. In the frame 27 area, the first filter plate 28 on the inner wall of the inner support frame 27 completes the initial impurity filtration, intercepting particulate impurities in the liquid. The liquid after the initial filtration enters the gap between the first filter plate 28 and the second filter plate 29. After secondary fine filtration by the second filter plate 29, it is delivered to the atomizing nozzle 24 on the inner side of the end cover plate 23. The atomizing nozzle 24 atomizes the liquid test medium and sprays it evenly onto the surface of the coating sample inside the test chamber 1, continuously simulating aging environments such as rain and humid corrosion, and conducting accelerated aging tests on the coating material.

[0021] In the spraying mechanism 2, the waste liquid generated by the spraying test drips onto the top of the bottom support plate 31. The downward tilting structure at both ends of the bottom support plate 31 guides the waste liquid to flow to both sides. When the waste liquid flows over the top of the bottom support plate 31, the notch at the bottom of the side baffle 32 can block large foreign objects. The waste liquid contacts the filter plate 33 through the frame grooves on both sides of the bottom support plate 31. The filter plate 33 is flush with the top of the bottom support plate 31, which can perform solid-liquid separation of the waste liquid and intercept coating debris and impurity particles that have fallen off in the waste liquid. The waste liquid that has completed the initial filtration flows into the bottom support frame 35 at the bottom through the through groove connected by the frame groove. After entering the bottom support frame 35, the waste liquid flows through the area of ​​the stacked carbon rods 34. The activated carbon rods 34 can adsorb organic impurities and pigments in the waste liquid. The bottom filter plate 37 supports the carbon rods 34 and ensures the purification of the waste liquid. The liquid flows smoothly downwards, preventing carbon rod debris from flowing out with the liquid. The purified liquid is then transported to the oil removal tank 36 through the connecting pipe 39 at the bottom of the bottom support frame 35. The symmetrically arranged inner baffles 310 inside the oil removal tank 36 can buffer and divert the liquid, reducing the liquid flow rate and causing the trace amounts of residual oil in the waste liquid to float to the top layer. The grooves at the bottom of the inner baffles 310 ensure normal flow of the liquid at the bottom layer. The side floats 311 can adaptively float according to the liquid level, blocking the oil on the top layer and completing the purification of the waste liquid. After the waste liquid is purified inside the oil removal tank 36, the second liquid pump 6 is started. The second liquid pump 6 is connected to the drain pipe 38 in the center of the oil removal tank 36 through the liquid inlet pipe, drawing out the clean liquid after oil removal and purification, and then transporting the liquid back to the top of the water tank 7 through the liquid outlet pipe, realizing the recycling of the test liquid.

Claims

1. An accelerated testing device for the aging resistance of coating materials, characterized in that, include: The test box (1) is equipped with a spraying mechanism (2) on the top of both sides, and a bottom pad mechanism (3) is installed inside the test box (1). A support mechanism (4) is installed on the top of the bottom pad mechanism (3). The first liquid pump (5) and the second liquid pump (6) are both installed on the outside of the detection box (1). A water tank (7) is installed on the outside of the detection box (1), and a door is provided on the outside of the detection box (1). The inlet of the first liquid pump (5) is connected to the bottom of the water tank (7) through a pipe. The outlet of the first liquid pump (5) is connected to the spraying mechanism (2) through a pipe. The inlet of the second liquid pump (6) is connected to the bottom pad mechanism (3) through a pipe. The outlet of the second liquid pump (6) is connected to the top of the water tank (7) through a pipe. The support mechanism (4) includes a fixed plate (41), a support plate (42) is fixedly installed on the top of the fixed plate (41), the support plate (42) is evenly installed on the top of the fixed plate (41) along the axial direction, and a side support plate (43) is fixedly installed on the outside of the support plate (42), the side support plate (43) is evenly installed on the outside of the support plate (42) along the axial direction, the top of the support plate (42) is inclined away from the side support plate (43), and a rubber pad (45) is fixedly installed on the inclined surface of the top of the support plate (42) near the side support plate (43), the outer side of the rubber pad (45) is evenly provided with protrusions, the top of the side support plate (43) near the inclined surface of the support plate (42) is also an inclined surface, and the inclined surface of the side support plate (43) is parallel to the inclined surface of the support plate (42), and a rubber pad block (44) is fixedly installed on the inclined surface of the side support plate (43).

2. The accelerated testing device for the aging resistance of coating materials according to claim 1, characterized in that: The bottom pad mechanism (3) includes a bottom support plate (31), which is fixedly installed on the bottom of the inner wall of the test box (1), and both ends of the bottom support plate (31) are inclined downward. The bottom support plate (31) has a frame groove evenly provided on both sides of the inclined bend at the top. The bottom of the bottom support plate (31) has a through groove evenly provided on both sides, and the through groove is connected to the frame groove. A filter plate (33) is fixedly installed in the frame groove of the bottom support plate (31). The top of the filter plate (33) is flush with the top of the bottom support plate (31).

3. The accelerated testing device for the aging resistance of coating materials according to claim 2, characterized in that: A side baffle (32) is fixedly installed on the top of the bottom support plate (31). The side baffle (32) is symmetrically installed along the center position of the axis of the bottom support plate (31), and the bottom of the side baffle (32) is uniformly provided with notches. The side baffle (32) is located between the filter plates (33). The bottom support plate (31) has a bottom support frame (35) fixedly installed on both sides of the bottom. The bottom support frame (35) corresponds to the through groove of the bottom support plate (31). The bottom filter plate (37) is fixedly installed on the bottom of the inner wall of the bottom support frame (35). The top of the bottom filter plate (37) and the bottom of the bottom support plate (31) are filled with carbon rods (34). The carbon rods (34) are made of activated carbon material.

4. The accelerated testing device for the aging resistance of coating materials according to claim 3, characterized in that: A connecting pipe (39) is fixedly installed at the bottom of the bottom support frame (35). The connecting pipe (39) is evenly installed along the axial direction at the bottom of the bottom support frame (35). An oil removal tank (36) is fixedly installed at one end of the connecting pipe (39) away from the bottom support frame (35). An inner baffle (310) is fixedly installed on the inner wall of the oil removal tank (36). The inner baffle (310) is symmetrically installed at the center position of the axis of the oil removal tank (36). A groove is opened at the bottom of the inner baffle (310). Side floats (311) are slidably installed on the non-opposing surfaces of the inner baffle (310). A drain pipe (38) is fixedly installed at the center position of the outer side of the oil removal tank (36). The end of the drain pipe (38) away from the oil removal tank (36) is connected to the inlet of the second liquid pump (6) through a pipe.

5. The accelerated testing device for the aging resistance of coating materials according to claim 4, characterized in that: The spraying mechanism (2) includes a fixed chamber (21), which is fixedly installed on both sides of the inner wall of the detection box (1). A fixed pipe (22) is fixedly installed on the outer side of the fixed chamber (21). The end of the fixed pipe (22) away from the fixed chamber (21) is connected to the outlet of the first liquid pump (5) through a pipe. An end cover plate (23) is fixedly installed on the side of the fixed chamber (21) away from the fixed pipe (22). An atomizing nozzle (24) is fixedly installed on the inner wall of the end cover plate (23).

6. The accelerated testing device for the aging resistance of coating materials according to claim 5, characterized in that: The inner wall of the fixed chamber (21) is fixedly installed with a sloping baffle (25) and an inner sloping plate (26). The sloping baffle (25) and the inner sloping plate (26) are both inclined from top to bottom away from the fixed tube (22). The bottom of the sloping baffle (25) is evenly provided with notches. The inner sloping plate (26) is located on the side of the sloping baffle (25) away from the fixed tube (22). The top of the inner sloping plate (26) does not contact the outside of the sloping baffle (25). The distance between the inner sloping plate (26) and the sloping baffle (25) gradually increases from top to bottom.

7. An accelerated testing device for the aging resistance of coating materials according to claim 6, characterized in that: An inner support frame (27) is fixedly installed on the inner wall of the fixed chamber (21). The inner support frame (27) is located on the side of the inner inclined plate (26) away from the inclined baffle (25). A first filter plate (28) is fixedly installed on the inner wall of the inner support frame (27). A second filter plate (29) is fixedly installed on the inner wall of the fixed chamber (21). The second filter plate (29) is located between the first filter plate (28) and the end cover plate (23), and there is a gap between the second filter plate (29) and the first filter plate (28).

8. A method of using the accelerated testing device for the aging resistance of a coating material according to any one of claims 1-7, characterized in that, It consists of the following steps: S1. Material fixing: The plate coated with the coating material is placed in the test box (1) and fixed by the support mechanism (4) so ​​that the side of the plate coated with the coating material is tilted upward to guide the sprayed salt spray water flow. S2, Salt spraying: The first liquid pump (5) drives the salt water in the water tank (7) to enter the spraying mechanism (2) through the pipeline, and the spraying mechanism (2) atomizes and sprays the salt water onto the coating material of the plate to carry out salt spray corrosion detection. S3, Saltwater diversion, through the cooperation of the support mechanism (4) and the bottom pad mechanism (3), the salt mist water flow after spraying is diverted and collected; S4. Brine circulation: The collected brine is filtered through the bottom pad mechanism (3) to remove foreign matter and oil stains from the brine. Then, it is driven into the water tank (7) by the second liquid pump (6) for reuse.

9. The method of using the accelerated testing device for the aging resistance of coating materials according to claim 8, characterized in that: In S1, the plate is fixed and secure, and the coating surface is fully exposed within the spray coverage area of ​​the spraying mechanism (2) without any blind spots.

10. The method of using the accelerated testing device for the aging resistance of coating materials according to claim 9, characterized in that: In S2, the spraying mechanism (2) needs to ensure that the salt spray atomization is uniform and the spraying intensity is stable.

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