An aging experiment system and experiment method for water-based paint research and development

Abstract

The application provides an aging experiment system and method for water-based paint research and development, which comprises an aging experiment box, a support frame, a simulation frame assembly and a light simulation assembly. The aging experiment box comprises an experiment box body, an experiment cavity and a placing shaft. The experiment cavity is arranged above the rear side of the experiment box body. Compared with the prior art, the application has the following beneficial effects: the aging experiment box, the simulation frame assembly and the light simulation assembly are arranged, the ultraviolet lamp holder faces the experiment plate during the experiment, and is rotated according to the day and night length in the natural environment to simulate the irradiation of the light to the experiment plate. In addition, the light is filtered by the filter at different time periods to output light at different time periods, so as to simulate the natural environment. The application is applied to the modern society, and the experiment plate is irradiated by the artificial simulation lamp at night, so that the natural environment is further simulated, the research and development experiment accuracy is improved, and the experiment operation convenience is improved by arranging the aging experiment box, the support frame and the simulation frame assembly.

Description

Technical Field

[0001] This invention belongs to the field of water-based paint research and development technology, and specifically relates to an aging test system and test method for water-based paint research and development. Background Technology

[0002] Water-based paints are coating systems that use water as a solvent or dispersion medium. In recent years, due to their low VOC (volatile organic compound) emissions and environmental advantages, they have been widely used in construction, furniture, automobiles, and industrial corrosion protection. However, during actual service, water-based paints are subjected to the combined effects of natural environmental factors such as sunlight radiation, temperature changes, humidity changes, and rain erosion. This leads to aging failures such as reduced gloss, discoloration, chalking, cracking, blistering, and embrittlement, severely affecting their protective and decorative functions. Therefore, accurately and efficiently evaluating the aging resistance of water-based paints is crucial during the research and development stage. Current technologies utilize equipment to conduct aging tests on water-based paints.

[0003] While existing aging test equipment plays a vital role in coating research and development, it still has some significant limitations: for example, it uses a single light source and cannot simulate the natural day-night light environment changes. Existing aging test chambers typically use a single type of light source (such as ultraviolet fluorescent lamps or xenon arc lamps) in a fixed location for continuous irradiation, or perform simple light / dark cycles. However, the light source itself does not change. In actual natural environments, coatings are not only exposed to sunlight during the day, but also to various artificial light sources at night, such as moonlight, streetlights, architectural landscape lighting, and advertising light boxes. The spectral distribution, intensity, and angle of these light sources are fundamentally different from sunlight, and have a significant impact on the aging behavior of coatings.

[0004] Furthermore, in aging experiments involving different experimental materials, since all materials are placed in the same chamber, there may be mutual interference issues in the differentiated experiments, leading to deviations in the final experimental data.

[0005] In particular, the light source spectrum of existing aging test chambers is usually fixed (e.g., using filters with a fixed cutoff wavelength) or can only achieve a few limited preset spectrum switching, which cannot simulate the continuous and gradual spectral characteristics of sunlight as the atmospheric quality changes from AM10 to AM1 throughout the day. This leads to significant deviations in the prediction of the aging behavior of water-based paints under real sunlight conditions.

[0006] In conclusion, it is necessary to propose a new structure to solve the aforementioned technical problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide an aging test system and method for the research and development of water-based paints, thereby resolving the problems mentioned in the background section.

[0008] The present invention is achieved through the following technical solution: an aging test system for water-based paint research and development, comprising: an aging test chamber, a support frame, a simulation frame assembly and a light simulation assembly, wherein the aging test chamber includes a test chamber body, a test chamber and a placement rotating shaft, and the test chamber is located above the rear side of the test chamber body; The placement shaft is rotatably connected to the lower middle position of the experimental chamber and extends downward. A support frame is installed above the placement shaft. The support frame includes a support base plate and a partition plate. Several sets of partition plates are fixedly connected to the upper surface of the support base plate in a circumferentially evenly distributed structure and are divided into several partition areas. Each of the partitioned areas is equipped with a simulation frame assembly, which includes a simulation ring frame. The light simulation component is movably fitted at one end of the simulation ring frame near its axis. The light simulation component includes a filter with a cutoff wavelength region that changes continuously along the ring direction, which is used to change the spectrum irradiated onto the experimental board as the light simulation component moves.

[0009] As a preferred embodiment, the rear side of the experimental chamber is rotatably connected to the experimental box body with a sealing door, which closes the experimental chamber after the experimental preparation is completed. The simulation frame assembly also includes annular teeth, annular groove, central shaft, rotary torsion spring, mounting frame and experimental plate. The annular surface teeth are fixedly connected to the side of the simulated ring frame away from the center of the support frame. The annular groove is opened on the inner side of the simulated ring frame. The central shaft is arranged through the radial position of the simulated ring frame. The central shaft is arranged in two sections in the radial position of the simulated ring frame. The mounting bracket is rotatably positioned between the upper and lower sets of central shafts and is positioned slightly lower than the axis of the simulated ring frame. The rotary torsion spring is positioned between the central shaft and the mounting bracket, and drives the mounting bracket to rotate and reset around the rotation axis without manual external force applied by the user. The experimental board is a fitted structure set inside the mounting frame. Its outer surface is symmetrically divided into a control surface and an experimental surface. The experimental surface is coated with water-based paint, and the control surface is coated with a reference sample or kept as a blank substrate. The experimental surface is exposed and the control surface is covered. The light simulation component includes an arc-shaped slider and a toothed gear. The same light-receiving surface of the experimental plate is divided into an experimental area and a control area by a sealing ring groove. The experimental area is coated with the water-based paint to be tested, while the control area can be coated with a reference sample or remain as a blank substrate. The mounting bracket blocks the control area and exposes the experimental area in the installed state, so that the experimental area is exposed to light, humidity and spray aging. The control area serves as an unaged or reference control area. The face gear is rotated by a rotary motor and is located at one end away from the center of the support frame. The face gear meshes with the annular face gear, and the meshing of the face gear with the annular face gear causes the light simulation component to move. The arc-shaped slider and the annular slide groove are movably engaged with each other.

[0010] In a preferred embodiment, the lower end of the experimental chamber is provided with a collecting groove, which is a trapezoidal structure with a wider top and a narrower bottom cross-section. The lower end of the collecting groove is provided with a flow guiding ring groove at the coaxial position where the rotating shaft is placed. A flow guiding hole is provided at the lower end of the flow guiding ring groove. The flow guiding ring groove is a recessed structure that collects the flow guiding hole. The lower end of the guide hole is connected to an external water tank, and the experimental chamber is also equipped with an atomizing nozzle, which atomizes the liquid medium into the experimental chamber according to the experimental requirements.

[0011] The rotary motor drives the face gear to rotate, and the face gear rotates along the ring face teeth, thereby controlling the light simulation component to move around the simulation ring frame. The angle between the ultraviolet lamp holder and the experimental board changes at different positions to simulate the angle of sunlight in the natural environment. Depending on the experimental needs, liquid will also be atomized to keep the experimental board in a humid environment for the purpose of humid environment experiments.

[0012] In a preferred embodiment, the light simulation component further includes a rotating seat, an ultraviolet lamp seat, a rotating switching seat, and a filter switching seat, with two sets of the rotating seats fixedly connected to the underside of the arc-shaped slider; The ultraviolet lamp holder is fixedly disposed between two sets of rotating seats. The light from the ultraviolet lamp holder is directed toward the center of the simulated ring frame. The rotating switching seat is also disposed between two sets of rotating seats and is rotatably connected. The filter switching seat is fixedly connected to the end of the rotating switching seat away from its rotation axis. The filter is disposed inside the filter switching seat. The filter includes a quartz glass substrate and a dielectric film. Multiple dielectric films are deposited on the quartz glass substrate using an ion beam sputtering process. Along the annular direction, the main cutoff wavelength of the film system changes continuously and linearly from one end to the other: the cutoff wavelength at one end is 410 nm (the transmission spectrum simulates the morning and evening spectrum of atmospheric mass AM10, with ultraviolet and short-wave visible light being significantly attenuated), and the cutoff wavelength at the other end is 290 nm (the transmission spectrum simulates the noon spectrum of atmospheric mass AM1, with almost full ultraviolet transmission). The middle region corresponds to intermediate spectra such as AM1.5 and AM2. The gradient change rate of the cutoff wavelength is approximately 0.4 nm of cutoff wavelength drift per millimeter of movement. A transmission shaft is also connected downwards along the axis of the face gear. A drive bevel gear is sleeved on the lower outer side of the transmission shaft. A driven bevel gear is meshed with the drive bevel gear on the side of the drive bevel gear facing the rotating seat. The driven bevel gear is coaxially linked with a transmission gear one on the side near the rotating seat. A transmission gear two is meshed below the transmission gear one. A transmission shaft two is connected at the axis of the transmission gear two. The transmission shaft two is fixedly connected to the rotary switching seat, and the rotation of the transmission shaft two is synchronously transmitted to the rotary switching seat.

[0013] During the movement of the light simulation component, the rotating switching seat will be driven to rotate via the transmission structure, which in turn will drive the filter to rotate, so that the filter passes through the ultraviolet lamp holder in different positions in sequence. In the initial position, after the light source starts at low voltage, the power is slowly increased. At this time, the filter is located at the 410nm cutoff end under the action of the filter transmission structure, and the morning and evening spectrum is output. The sample receives large-angle oblique illumination, rich in infrared / visible light, and poor in ultraviolet light. The rotating motor accelerates according to the program, driving the rotating switching seat to rotate to reduce the irradiation angle and push the filter towards the 290nm cutoff end. As the angle gradually decreases, the ultraviolet component in the spectrum gradually increases, reaching the maximum ultraviolet proportion at noon, which better simulates the process of atmospheric quality from high to low, thereby realizing daytime illumination simulation.

[0014] As a preferred embodiment, the simulation frame assembly also includes an artificial simulation light, a linkage magnetic block, a linkage push base, a conductive block, a reset cut-off spring, and a conductive cable. The artificial simulation light is located inside the simulation ring frame, and its arc length corresponds to the preset nighttime period area on the simulation ring frame. The linkage magnetic block is a movable interlocking structure set inside the simulation ring frame and located on the side of the non-artificial simulation lamp. The linkage magnetic block is set in several groups and is distributed in a circumferentially evenly distributed structure. The linkage push seat is fixedly connected to the linkage magnetic block on the side away from the center of the simulation ring frame. One end of the reset cut-off spring is fixedly connected to the other end of the linkage push base. The other end of the reset cut-off spring is also a fixed structure and is set in the electrical groove opened inside the simulated ring frame. The two sets of conductive electrical blocks are respectively set at both ends of the electrical groove, and one of the conductive electrical blocks is fixedly connected to the linkage push base. Both of the conductive blocks are electrically connected to the artificial simulation lamp via conductive cables. The simulated ring frame also has a built-in battery to provide power to the artificial simulation lamp. Several conductive blocks in pairs are connected in parallel with the artificial simulation lamp and the battery. The arc-shaped slider is fixedly connected to a pushing magnetic block on the inner side of one end facing the simulation ring frame. The pushing magnetic block and the linkage magnetic block have the same magnetism on their opposite surfaces. After the two are set opposite each other, they provide magnetic thrust, thereby enabling the two conductive blocks to overcome the rebound force of the reset cut-off spring and make contact to realize the conduction of the working circuit of the artificial simulation lamp. The artificial simulation lamp also has a built-in delay shutdown circuit to keep the artificial simulation lamp always on during the movement and switching of the light simulation component.

[0015] When the light simulation component passes the radial position of the experimental board, the ultraviolet lamp holder can no longer irradiate the experimental board. Under the magnetic structure, the starting circuit of the artificial simulation lamp is activated, so that the artificial simulation lamp is turned on and irradiates the experimental board to simulate the aging effect of artificial light sources at night in modern society on water-based paint, and thus further simulate the usage environment of water-based paint.

[0016] As a preferred embodiment, the lighting simulation component further includes a linkage arc seat, a pneumatic pusher, a pneumatic plunger, a pusher return spring, a pneumatic conduit, a pneumatic telescopic rod, a telescopic rod body, and a light-reducing curtain. The two sets of linkage arc seats and rotary switching seats are concentrically arranged and fixedly connected. The arc length of the linkage arc seat is set according to the required duration of light irradiance reduction. The arc slider is fixedly connected to a parts box on the side away from the simulation ring frame. The pneumatic push head is a movable fitting structure set inside the parts box. The pneumatic plunger is fixedly connected to the bottom of the pneumatic pusher, the pusher return spring is located below the pneumatic plunger, the intensity reduction light curtain is movably fitted into the lower end of the inner side of the parts box, and the telescopic rod body is fixedly connected to one end of the non-exposed side of the intensity reduction light curtain. The pneumatic telescopic rod is sleeved on the outside of the telescopic rod body. The pneumatic conduit is connected between the pneumatic telescopic rod and the cavity where the push head return spring is located. When the pneumatic plunger moves down, the gas inside the cavity is guided through the pneumatic conduit, thereby pushing the telescopic rod body to move linearly and push the light curtain out to position it below the ultraviolet lamp holder. A return spring for resetting the light curtain is also sleeved on the outside of the telescopic rod body. The light curtain substrate is made of 0.08mm thick SUS304 stainless steel foil. On the stainless steel foil, circular micro-holes with a diameter of 80μm are cut using ultraviolet picosecond laser micromachining technology. The hole walls are smooth and have no recast layer, ensuring that micro-cracks will not occur due to thermal stress during long-term use. The holes are arranged in a regular hexagonal array with a center distance of 200μm between adjacent holes to ensure the uniformity of light transmittance of the curtain in the width direction. During dawn and dusk, the geometric transmittance of the light curtain is reduced to about 15%, which means that the light beam is attenuated by about 85%.

[0017] During the experiment, a light curtain with reduced intensity will extend from the ultraviolet lamp holder during the day-night cycle to block part of the light beam, further reducing the total irradiance and making the simulated environment closer to the actual service environment.

[0018] In a preferred embodiment, the upper surface of the mounting frame is provided with a mounting groove, the experimental plate is fitted into the inner side of the mounting groove, and a sealing ring groove is provided in the middle of the outer side of the experimental plate, and an airbag-type sealing ring is fitted into the inner side of the sealing ring groove. The airbag-type sealing ring is inflated by an external air pressure push structure. After the mounting bracket is reset by the rotation torsion spring, its light illumination surface is perpendicular to the diameter of the simulated ring frame and is offset relative to the central axis.

[0019] In a preferred embodiment, the aging test chamber further includes a fitting groove, a locking groove, a ratchet ring, a one-way meshing tooth, a switching connector, a positive magnetic block, a cutting spring, a switching connecting rod, a negative magnetic block, a switching screw, and a switching sleeve. Both sets of ratchet rings are sleeved on the outside of the placement shaft and are configured in opposite directions. Both sets of switching links are movable structures located inside the experimental chamber. The negative pole magnet is fixedly connected to the front end of the switching link, and the cutting spring is located in front of the negative pole magnet. The switching connector is located on the front side of the cutting spring. Both ends of the cutting spring are fixed structures. The positive magnetic block is located on the rear side of the switching connector. The two sets of one-way meshing teeth are fixedly connected to the front sides of the two sets of switching connectors and mesh with the two sets of ratchet rings arranged in opposite directions. The switching screw is rotatably connected to the rear end of the inner side of the experimental chamber body. The switching sleeve is threaded and fitted onto the outside of the switching screw. The front and rear ends of the outer side of the switching screw are provided with external threads of opposite directions, which are used to simultaneously control the two sets of switching linkages to move in opposite directions. The switching sleeve is also fixedly connected to the switching linkage. The number of teeth of the ratchet ring is set so that the placement shaft has an adjustment interval of 15° during rotation.

[0020] In a preferred embodiment, the fitting groove is formed on the upper surface of the rotating shaft and is a square groove structure. The three sets of engagement grooves are formed on the outer side of the rotating shaft in a circumferentially evenly distributed structure and are provided through the fitting groove. A fitting shaft is fixedly connected to the lower surface of the support plate, and a fitting block is fixedly connected below the fitting shaft and fits into the fitting groove. The lower end of the fitting shaft fits into the upper end of the placement shaft. The inner side of the fitting shaft is a movable fitting structure with three sets of locking blocks evenly distributed in a circle. The edge of the locking block away from the axis of the fitting shaft is rounded, and the lower rounded corner allows the locking block to be pressed down and inserted into the locking groove. A disassembly and assembly bracket is fixedly connected to one end of the locking block near the axis of the fitting shaft, and a disassembly and assembly spring is fixedly connected to the other side of the disassembly and assembly bracket. The locking block and the locking groove are interlocked. A linkage pressure ring is movably sleeved on the outer side of the fitting shaft. The linkage pressure ring is also moved upward after the external force is removed by a disassembly and reset spring.

[0021] The support frame is a detachable structure connected to the placement pivot, and its disassembly and assembly process is convenient. This allows experimenters to select different models of support frames according to experimental needs and combine them with the aging test chamber. The installation of the test plate is plug-and-play. The experimental area and control area are distinguished by the built-in shielding structure of the simulation frame component, without the need for pre-set wrapping shielding, thereby improving the convenience of experimental operation.

[0022] After adopting the above technical solution, the beneficial effects of the present invention are: 1. By setting up an aging test chamber, simulation rack components, and lighting simulation components, water-based paint is applied to the surface of the test board and pre-installed. During the experiment, the ultraviolet lamp holder faces the test board and rotates according to the day and night length in the natural environment to simulate the illumination of the test board by the light. At different times, the light is filtered by a filter to output light that is adapted to different times of the day to simulate the natural environment. When applied to modern society, artificial simulated lights are used to assist in the illumination at night to further simulate the natural environment, thereby improving the accuracy of research and development experiments.

[0023] 2. By setting up an aging test chamber, support frame, and simulation frame components, the support frame is a detachable structure connected to the placement pivot, and its disassembly and assembly process is convenient. This allows experimenters to select different models of support frames according to experimental needs and combine them with the aging test chamber. The installation of the test plate is plug-and-play. The built-in shielding structure of the simulation frame component distinguishes the experimental area from the control area, eliminating the need for pre-set wrapping shielding, thereby improving the convenience of experimental operation.

[0024] This invention also relates to an experimental method for an aging test system used in the research and development of water-based paints, characterized by comprising the following steps: a. Install the experimental panel coated with water-based paint onto the mounting frame, and make the experimental area of ​​the experimental panel face the light simulation component; b. Control the meshing and rotation of the face gear and the ring face gear to move the light simulation component along the simulation ring frame, so as to change the irradiation angle of the ultraviolet lamp holder relative to the experimental board. c. During the movement of the light simulation component, the rotating switching seat is driven to rotate by the transmission shaft one, the active bevel gear, the driven bevel gear, the transmission gear one, the transmission gear two and the transmission shaft two, so that different cutoff wavelength regions of the filter enter the light output path of the ultraviolet lamp holder. d. When the light simulation component enters the preset nighttime area, the ultraviolet lamp holder stops or reduces its output, and the artificial simulation lamp is turned on by the magnetic action of the pushing magnetic block and the linkage magnetic block. e. Execute the above light simulation process in a cycle according to the preset aging period, and take out the experimental board for aging performance testing after the experiment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of an aging test system and test method for the research and development of water-based paints according to the present invention.

[0027] Figure 2 This is a schematic diagram of the aging test chamber in the aging test system and test method for water-based paint research and development of the present invention.

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 This is a partial cross-sectional schematic diagram of the aging test chamber in the aging test system and test method for the research and development of water-based paint of the present invention.

[0030] Figure 5 This is a schematic diagram of the upper structure of the support frame in the aging test system and test method for water-based paint research and development according to the present invention.

[0031] Figure 6 This is a schematic diagram of the lower structure of the support frame in the aging test system and test method for water-based paint research and development according to the present invention.

[0032] Figure 7 This is a partial cross-sectional schematic diagram of the support frame in the aging test system and test method for water-based paint research and development according to the present invention.

[0033] Figure 8 This is a schematic diagram of the right side of the simulation frame component in the aging test system and test method for water-based paint research and development according to the present invention.

[0034] Figure 9 for Figure 8 A partial sectional view.

[0035] Figure 10 This is a schematic diagram of the left side of the simulation frame component in the aging test system and test method for water-based paint research and development according to the present invention.

[0036] Figure 11 for Figure 10 A partial sectional view.

[0037] Figure 12 This is a schematic diagram of the outer end structure of the light simulation component in the aging test system and test method for water-based paint research and development of the present invention.

[0038] Figure 13 This is a schematic diagram of the internal structure of the light simulation component in the aging test system and test method for water-based paint research and development according to the present invention.

[0039] Figure 14 This is a partial cross-sectional schematic diagram of the light simulation component in the aging test system and test method for water-based paint research and development according to the present invention.

[0040] Figure 15 This is a simplified circuit diagram of the artificial simulation lamp in the aging test system and test method for water-based paint research and development according to the present invention.

[0041] In the diagram, 100-aging test chamber, 101-test chamber body, 102-test chamber, 103-collection groove, 104-guide ring groove, 105-guide hole, 106-placement shaft, 107-fitting groove, 108-locking groove, 109-ratchet ring, 110-one-way meshing tooth, 111-switching connector, 112-positive magnetic block, 113-cut-off spring, 114-switching linkage, 115-negative magnetic block, 116-switching screw, 117-switching sleeve; 200-Support frame, 201-Support base plate, 202-Divider plate, 203-Matching shaft, 204-Matching block, 205-Disassembly spring, 206-Disassembly connecting seat, 207-Snap-fit ​​block, 208-Linkage pressure ring; 300-Simulation frame assembly, 301-Simulation ring frame, 302-Annular toothed surface, 303-Annular slide groove, 304-Central shaft, 305-Rotation torsion spring, 306-Mounting frame, 307-Mounting groove, 308-Experimental plate, 309-Airbag type sealing ring, 310-Artificial simulation lamp, 311-Linkage magnetic block, 312-Linkage push seat, 313-Conductive block, 314-Reset cut-off spring, 315-Conductive cable; 400-Lighting simulation component, 401-Arc slider, 402-Pushing magnetic block, 403-Rotating seat, 404-UV lamp holder, 405-Rotary switching seat, 406-Filter switching seat, 407-Filter, 408-Linked arc seat, 409-Pneumatic pusher, 410-Pneumatic plunger, 411-Pusher return spring, 412-Transmission shaft two, 413-Pneumatic conduit, 414-Pneumatic telescopic rod, 415-Telescopic rod body, 416-Intensity reduction light curtain, 417-Face gear, 418-Transmission shaft one, 419-Driving bevel gear, 420-Driven bevel gear, 421-Transmission gear one, 422-Transmission gear two. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-15 The present invention provides a technical solution: an aging test system for water-based paint research and development, comprising: an aging test chamber 100, a support frame 200, a simulation frame assembly 300 and a light simulation assembly 400. The aging test chamber 100 includes a test chamber body 101, a test chamber 102 and a placement rotating shaft 106. The test chamber 102 is located above the rear side of the test chamber body 101. The placement shaft 106 is rotatably connected to the lower middle position of the experimental chamber 102 and extends downward. A support frame 200 is installed above the placement shaft 106. The support frame 200 includes a support base plate 201 and a partition plate 202. Several sets of partition plates 202 are fixedly connected to the upper surface of the support base plate 201 in a circumferentially evenly distributed structure and are divided into several partition areas. The partition plates 202 are made of opaque and weather-resistant material and are not lower than the height of the light-receiving area of ​​the experimental plate. Light-shielding isolation is formed between adjacent partition areas. If necessary, a flexible light-shielding edge is provided at the edge of the partition plate to reduce light leakage at the edge. Each partitioned area is equipped with a simulation frame assembly 300, which includes a simulation ring frame 301. A light simulation assembly 400 is movably fitted onto one end of the simulation ring frame 301 near its axis. The light simulation assembly 400 includes a filter 407, which has a cutoff wavelength region that changes continuously along the ring direction, and is used to change the spectrum irradiated onto the experimental board 308 as the light simulation assembly 400 moves.

[0044] Please see Figures 1-2 , Figures 5-6 and Figures 8-15 Example 1: The experimental chamber 102 is rotatably connected to the experimental box body 101 with a sealing door at the rear. After the experimental preparation is completed, the experimental chamber 102 is closed. The simulation frame assembly 300 also includes an annular surface tooth 302, an annular slide groove 303, a central shaft 304, a rotary torsion spring 305, a mounting frame 306, and an experimental plate 308. The annular tooth 302 is fixedly connected to the side of the simulated ring frame 301 away from the center of the support frame 200. The annular groove 303 is opened on the inner side of the simulated ring frame 301. The central shaft 304 is arranged in the radial position of the simulated ring frame 301. The central shaft 304 is arranged in two sections in the radial position of the simulated ring frame 301. Mounting bracket 306 is rotatably positioned between the upper and lower sets of central shafts 304 and is positioned slightly lower than the axis of the simulated ring frame 301. Rotational torsion spring 305 is positioned between the central shaft 304 and the mounting bracket 306, and drives the mounting bracket to rotate and reset around the rotation axis without manual external force applied by the user. The experimental board 308 is a fitted structure set inside the mounting bracket 306. Its outer surface is symmetrically divided into a control surface and an experimental surface. The experimental surface is coated with water-based paint, and the control surface is coated with a reference sample or kept as a blank substrate. The experimental surface is exposed and the control surface is covered. The light simulation component 400 includes an arc-shaped slider 401 and a toothed gear 417. The same light-receiving surface of the experimental plate 308 is divided into an experimental area and a control area by a sealing ring groove. The experimental area is coated with the water-based paint to be tested, while the control area can be coated with a reference sample or remain as a blank substrate. The mounting bracket 306 shields the control area and exposes the experimental area in the installed state, so that the experimental area is exposed to light, humidity and spray aging. The control area serves as an unaged or reference control area. The face gear 417 is rotated by a rotary motor and is located at one end away from the center of the support frame 200. The face gear 417 is driven by a rotary motor (not shown in the figure), which is installed inside the lighting simulation component 400. In this invention, the rotary motor is a micro stepper motor, whose output shaft is coaxially fixedly connected to the transmission shaft 418 through a coupling. The stepper motor is controlled by an external controller program, and its speed curve is preset according to the local sunshine duration and the rate of change of the solar altitude angle, so that the moving speed of the lighting simulation component 400 can simulate the apparent motion angular velocity of the sun in the sky. The face gear 417 meshes with the annular face gear 302, and the meshing of the face gear 417 with the annular face gear 302 causes the lighting simulation component 400 to move. The arc-shaped slider 401 and the annular slide groove 303 are movably engaged with each other.

[0045] The rotary motor is located inside the lighting simulation component 400, and its output shaft is coaxially connected to the transmission shaft 418. An external controller is used to control the start and stop of the rotary motor and the ultraviolet lamp holder 404 according to a preset program. The atomizing nozzle is located above or on the side wall of the experimental chamber.

[0046] The lower end of the experimental chamber 102 is provided with a collecting groove 103, which is a trapezoidal structure with a wider upper cross-section and a narrower lower cross-section. The lower end of the collecting groove 103 is provided with a flow guiding ring groove 104 located on the same axis as the rotating shaft 106. A flow guiding hole 105 is provided at the lower end of the flow guiding ring groove 104. The flow guiding ring groove 104 is a recessed structure that collects the flow guiding hole 105. The lower end of the guide hole 105 is connected to the external receiving water tank. The experimental chamber 102 is also equipped with an atomizing nozzle, which atomizes the liquid medium into the experimental chamber 102 according to the experimental requirements.

[0047] A rotary motor drives the face gear 417 to rotate, and the face gear 417 meshes and rotates along the annular face gear 302, thereby controlling the light simulation component 400 to move around the simulation ring frame 301. The angle between the ultraviolet lamp holder 404 and the experimental plate 308 changes at different positions to simulate the angle of sunlight in the natural environment. Depending on the experimental needs, liquid will also be atomized to keep the experimental plate 308 in a humid environment for the purpose of conducting experiments in a humid environment.

[0048] The lighting simulation component 400 also includes a rotating seat 403, an ultraviolet lamp seat 404, a rotating switching seat 405, and a filter switching seat 406. The two sets of rotating seats 403 are fixedly connected to the bottom of the arc-shaped slider 401. The UV lamp holder 404 is fixedly disposed between the two sets of rotating seats 403. The UV lamp holder 404 is positioned with its light directed toward the center of the simulation ring frame 301. The rotating switching seat 405 is also disposed between the two sets of rotating seats 403 and is rotatably connected. The filter switching seat 406 is fixedly connected to the end of the rotating switching seat 405 away from its axis of rotation. Filter 407 is disposed inside filter switching seat 406. Filter 407 includes a quartz glass substrate and a dielectric film. Multilayer dielectric film is deposited on the quartz glass substrate using ion beam sputtering process. Along the annular direction, the main cutoff wavelength of the film system changes continuously and linearly from one end to the other: the cutoff wavelength at one end is 410nm, and the transmission spectrum simulates the morning and evening spectrum of atmospheric quality AM10. Ultraviolet and short-wave visible light are significantly attenuated. The cutoff wavelength at the other end is 290nm, and the transmission spectrum simulates the noon spectrum of atmospheric quality AM1. Ultraviolet light is almost fully transparent. The middle region corresponds to intermediate spectra such as AM1.5 and AM2. The gradient change rate of the cutoff wavelength is approximately 0.4nm cutoff wavelength drift per millimeter of movement. A transmission shaft 418 is also connected downwards from the axis of the face gear 417. A drive bevel gear 419 is sleeved on the lower outer side of the transmission shaft 418. A driven bevel gear 420 is meshed with the drive bevel gear 419 on the side facing the rotating seat 403. Driven bevel gear 420 is coaxially linked to transmission gear 421 on the side near rotating seat 403. Transmission gear 422 is meshed below transmission gear 421. Transmission shaft 412 is connected at the axis of transmission gear 422. Transmission shaft 412 is fixedly connected to rotary switching seat 405, and synchronously transmits the rotation of transmission shaft 412 to rotary switching seat 405.

[0049] During the movement of the light simulation component 400, the rotating switching seat 405 will be driven to rotate via the transmission structure, which in turn will drive the filter 407 to rotate. The filter 407 will pass through the ultraviolet lamp holder 404 in different positions in sequence. In the initial position, after the light source starts at low voltage, the power is slowly increased. At this time, the filter 407 is located at the 410nm cutoff end under the action of the transmission structure, and outputs the dawn and dusk spectrum. The sample receives large-angle oblique illumination, rich in infrared / visible light, and poor in ultraviolet light. The rotating motor accelerates according to the program, driving the rotating switching seat 405 to rotate to reduce the irradiation angle, pushing the filter 407 towards the 290nm cutoff end. As the angle gradually decreases, the ultraviolet component in the spectrum gradually increases, reaching the maximum ultraviolet proportion at noon, which better simulates the process of atmospheric quality from high to low, thereby realizing daytime illumination simulation.

[0050] The simulation frame assembly 300 also includes an artificial simulation light 310, a linkage magnetic block 311, a linkage push base 312, a conductive block 313, a reset cut-off spring 314, and a conductive cable 315. The artificial simulation light 310 is located inside the simulation ring frame 301, and its arc length corresponds to the preset nighttime period area on the simulation ring frame 301. The linkage magnetic block 311 is a movable fitting structure set inside the simulation ring frame 301 and located on the side of the non-artificial simulation lamp 310. The linkage magnetic block 311 is provided in several groups and is distributed in a circumferentially evenly distributed structure. The linkage push seat 312 is fixedly connected to the linkage magnetic block 311 on the side away from the center of the simulation ring frame 301. One end of the reset cut-off spring 314 is fixedly connected to the other end of the linkage push base 312. The other end of the reset cut-off spring 314 is also a fixed structure and is set in the electrical groove opened inside the simulation ring frame 301. Two sets of conductive electrical blocks 313 are respectively set at both ends of the electrical groove, and one conductive electrical block 313 is fixedly connected to the linkage push base 312. Both conductive blocks 313 are electrically connected to the artificial simulation lamp 310 via conductive cables. The simulation ring frame 301 also has a built-in battery to provide working power to the artificial simulation lamp 310. Several conductive blocks 313 in pairs are connected in parallel with the artificial simulation lamp 310 and the battery. A push magnet 402 is fixedly connected to the inner side of the arc-shaped slider 401 facing the simulation ring frame 301. The push magnet 402 and the linkage magnet 311 have the same magnetic properties on their opposite sides. After the two are set relative to each other, they provide magnetic thrust, which in turn makes the two conductive blocks 313 overcome the rebound force of the reset cut-off spring 314 and make contact to realize the conduction of the working circuit of the artificial simulation lamp 310. The artificial simulation lamp 310 also has a built-in delay shutdown circuit to keep the artificial simulation lamp 310 always on during the movement and switching of the light simulation component 400.

[0051] When the light simulation component 400 passes the radial position of the experimental board 308, the ultraviolet lamp holder 404 can no longer irradiate the experimental board 308, and the starting circuit of the artificial simulation lamp 310 is turned on under the magnetic structure, so that the artificial simulation lamp 310 irradiates the experimental board 308 to simulate the aging effect of artificial light sources at night in modern society on water-based paint, and thus further simulate the usage environment of water-based paint.

[0052] The lighting simulation component 400 also includes a linkage arc seat 408, a pneumatic pusher head 409, a pneumatic plunger 410, a pusher head return spring 411, a pneumatic conduit 413, a pneumatic telescopic rod 414, a telescopic rod body 415, and a light-reducing curtain 416. Two sets of linkage arc seats 408 and rotary switching seats 405 are concentrically set and fixedly connected. The arc length of the linkage arc seat 408 is set according to the required duration of light irradiance reduction. The arc slider 401 is fixedly connected to the parts box on the side away from the simulation ring frame 301. The pneumatic push head 409 is a movable fitting structure set inside the parts box. The pneumatic plunger 410 is fixedly connected to the lower part of the pneumatic pusher 409, the pusher return spring 411 is set below the pneumatic plunger 410, the intensity reduction light curtain 416 is movably fitted into the lower end of the inner side of the parts box, and the telescopic rod body 415 is fixedly connected to one end of the non-exposed side of the intensity reduction light curtain 416. A pneumatic telescopic rod 414 is sleeved onto the outside of the telescopic rod body 415. A pneumatic conduit 413 is connected between the pneumatic telescopic rod 414 and the cavity containing the pusher return spring 411. When the pneumatic plunger 410 moves downward, the gas inside the cavity is guided through the pneumatic conduit 413, thereby pushing the telescopic rod body 415 to move linearly, pushing out the intensity-reducing light curtain 416 so that it is positioned below the ultraviolet lamp holder 404. A return spring for resetting the intensity-reducing light curtain 416 is also sleeved on the outside of the telescopic rod body 415. The body is made of 0.08mm thick SUS304 stainless steel foil, and circular micro-holes with a diameter of 80μm are cut into the stainless steel foil using ultraviolet picosecond laser micromachining technology. The hole walls are smooth and there is no recast layer, ensuring that no micro-cracks will be generated due to thermal stress during long-term use. The holes are arranged in a regular hexagonal array with a center distance of 200μm between adjacent holes, ensuring the uniformity of light transmittance of the curtain in the width direction. During dawn and dusk, the geometric light transmittance of the light-reducing curtain 416 is reduced to about 15%, which means that the light beam is attenuated by about 85%.

[0053] During the experiment, the intensity reduction light curtain 416 extends from the ultraviolet lamp holder at the alternation of day and night to block part of the light beam, further reducing the total irradiance and making the simulated environment closer to the actual service environment.

[0054] Specifically, in the early stage of the water-based paint research and development experiment, the experimenters prepared according to different experimental needs. For example, they selected a support frame 200 with corresponding partition areas according to the number of samples, and selected a UV lamp holder 404 of the corresponding model according to the needs of the water-based paint aging experiment, so that it has an initial irradiation intensity. The experimental plate 308 is divided according to the sealing ring groove, and the experimental water-based paint and control material are coated on both sides respectively. The experimental plate 308 is placed on the mounting frame 306 for quick installation. After the installation is completed, the external force is removed, and the rotary torsion spring 305 drives the mounting frame to rotate so that it is set perpendicular to the diameter of the simulation ring frame 301. The lighting simulation component 400 starts from 0° position to simulate the process of sunrise in a natural environment. At this time, the ultraviolet lamp holder 404 emits a beam of light at a large angle to the irradiation surface of the experimental board 308, and gradually drives the toothed gear 417 to rotate via a rotary motor. The toothed gear 417 rotates around the simulation ring frame 301 while meshing with the ring toothed gear 302, thereby simulating the irradiation angle of sunlight and the experimental board 308 at different times in a natural environment. When the ultraviolet lamp holder 404 is in the on state and irradiating the experimental board 308, the artificial simulation lamp 310 is in the off state. As the lighting simulation component 400 moves around the simulation ring frame 301, the rotation of the face gear 417 synchronously drives the transmission shaft 418 to rotate, which in turn drives the driven bevel gear 420 to rotate. The rotation of the driven bevel gear 420 in turn drives the transmission gear 421 to rotate, and through the meshing of the transmission gear 421 and the transmission gear 422, drives the transmission shaft 412 to rotate, which in turn drives the rotating switching seat 405 to rotate. This causes the filter switching seat 406 to rotate during the day, so that different sections of the filter 407 are in different positions at different times of the day. Since the light from the ultraviolet lamp holder 404 is filtered by the filter 407 before it can illuminate the surface of the experimental board 308, the filter 407 has different filtering characteristics for the light at different positions, which allows the lighting simulation component 400 to simulate the changes in the angle and intensity of sunlight in the natural environment. Secondly, in the simulation of the natural environment, modern society is not without light at night, especially the water-based paint used in cities, which is illuminated by artificial lights at night. Therefore, this invention is provided with an illumination structure to simulate the night environment. When the light simulation component 400 passes the period after sunset, the pushing magnetic block 402 in the light simulation component 400 will push the linkage magnetic block 311 to move linearly under the action of the magnetic force of like poles repelling each other, and overcome the elastic force of the reset cut-off spring 314, so that the two conductive blocks 313 approach each other and eventually come into contact. In the circuit used to control the start and stop of the artificial simulated light 310, the parallel circuit setting means that the artificial simulated light 310 can be turned on when the two conductive blocks 313 come into contact at a certain point, so that the artificial simulated light 310 illuminates the experimental board 308, thereby completing the simulation of the night environment. Since the city lights in the night environment are mostly fixed, the artificial simulated light 310 is not moved in this invention. In the start / stop control structure of the artificial simulation lamp 310, several sets of linkage magnetic blocks 311 are arranged at intervals. As the light simulation component 400 moves continuously, it will continuously pass through linkage magnetic blocks 311 at different positions. When it passes the previous linkage magnetic block 311, due to the disappearance of the magnetic force, the conductive block 313 at this position is set in an interval state under the action of the return force of the reset cut-off spring 314, thereby switching the conductive circuit at this position to an open circuit state. When the light simulation component 400 moves to the next linkage magnetic block 311, due to the built-in delay shutdown circuit in the artificial simulation lamp 310 circuit (the delay shutdown circuit involved in this invention adopts existing mature technology, which can be selected from, but is not limited to, RC delay circuit, NE555 monostable circuit and microcontroller (Arduino / 51) control circuit, as long as it meets the requirements of this invention, it will not be described in detail here), the artificial simulation lamp 310 can still be in the on state during this transition period, so as to realize that the artificial simulation lamp 310 always has light shining towards the experimental board 308 during the night. Next, the lighting simulation component 400 continues to move around the simulation ring frame 301, and when it passes the control area of ​​the artificial simulation light 310, it repeats the morning period mentioned above, and then cycles to complete the illumination of the experimental board by day and night lights in the natural environment. This can complete the natural environment simulation of water-based paint. In addition, due to the setting of the partition plate 202 in the support frame 200, different experimental boards 308 are placed in different partition areas. The partition plate 202 can separate different areas and block the illumination interference of lights in different positions to other areas, so as to obtain multiple sets of experimental data in a single experiment and improve the overall experimental efficiency. During the experiment, the present invention also includes a structure for further reducing light intensity, which assists in reducing light intensity during dawn and dusk. During dawn and dusk, the rotation of the rotating switching seat 405 causes the linkage arc seat 408 to rotate accordingly. When the linkage arc seat 408 contacts the pneumatic pusher 409, it squeezes the pneumatic pusher 409 downward, causing it to move downward and simultaneously compressing the pusher return spring 411. The downward movement of the pneumatic pusher 410 pushes the gas to compress and pass through the pneumatic... The conduit 413 guides the gas into the pneumatic telescopic rod 414, thereby causing the gas to push the telescopic rod body 415 to move, leading the light-reducing curtain 416 to the irradiation end of the ultraviolet lamp holder 404. This reduces the geometric transmittance of the light-reducing curtain 416 to about 15% during dawn and dusk, resulting in about 85% attenuation of the light beam. This makes the simulation of the natural environment closer to the actual service environment. (The reset of the light-reducing curtain 416 is achieved by a return spring, which can be reset by the rebound force of the return spring without the action of pneumatic pushing force.) In the aging test of water-based paint, the liquid medium can be atomized and sprayed out through the built-in atomizing nozzle, so that the test chamber 102 is filled with atomized liquid, thereby simulating the humid environment in the use of water-based paint. The liquid in the test chamber 102 will be collected through the collection tank 103 and the guide ring groove 104, and further collected through the guide hole 105, and finally guided to the external water tank for collection. A core aspect of this invention is that the filter 407 has a continuously varying cutoff wavelength along the annular direction, so that as the ultraviolet lamp holder 404 moves, the spectrum irradiated onto the experimental plate 308 can continuously change, working in conjunction with the change in the irradiation angle to simulate the complete natural process of sunlight from dawn to noon. In this embodiment, the ultraviolet lamp holder 404 adopts an adjustable power ultraviolet / visible composite light source. The distance between the ultraviolet lamp holder 404 and the experimental surface of the experimental board 308 is maintained within a preset range. The rotary motor controls the surface gear 417 to rotate according to a preset day-night cycle, so that the light simulation component 400 completes the movement from the dawn position to the noon position and then to the evening position within the day simulation interval. Before the experiment, the irradiance and spectral distribution of the surface of the experimental board 308 are calibrated by an irradiance meter or a spectrometer so that the light conditions at different positions meet the preset aging experiment requirements. The above experimental process improves the simulation of the natural environment, better simulates the actual use environment of water-based paint, and makes the data obtained from the aging test more closely resemble the actual service environment, providing more accurate experimental data in the research and development of water-based paint.

[0055] Please see Figures 1-10 Example 2: The upper surface of the mounting bracket 306 has a mounting groove 307, the experimental plate 308 is fitted inside the mounting groove 307, and a sealing ring groove is provided in the middle of the outer side of the experimental plate 308. An airbag-type sealing ring 309 is fitted inside the sealing ring groove. The airbag-type sealing ring 309 is inflated by an external air pressure push structure (the airbag-type sealing ring 309 is connected to a manual press-type inflation valve on the outside of the experimental chamber body 101 through a thin hose (not shown in the figure). After the experimenter inserts the experimental plate 308 into the mounting groove 307, pressing the inflation valve will inflate the airbag-type sealing ring 309 with air, causing it to expand and fit tightly with the sealing ring groove to achieve a waterproof seal. When disassembling, the air can be released through the valve). After the mounting frame 306 is reset by the rotation torsion spring 305, its light illumination surface is perpendicular to the diameter of the simulation ring frame 301 and offset relative to the central axis 304.

[0056] The aging test chamber 100 also includes a fitting groove 107, a locking groove 108, a ratchet ring 109, a one-way meshing tooth 110, a switching connecting seat 111, a positive magnetic block 112, a cutting spring 113, a switching connecting rod 114, a negative magnetic block 115, a switching screw 116, and a switching sleeve 117. Both sets of ratchet rings 109 are sleeved on the outside of the placement shaft 106 and are set in opposite directions. Both sets of switching links 114 are movable structures set inside the experimental box body 101. The negative pole magnet 115 is fixedly connected to the front end of the switching link 114, and the cut-off spring 113 is set in front of the negative pole magnet 115. The switching connector 111 is located in front of the cutting spring 113. Both ends of the cutting spring 113 are fixed structures. The positive magnetic block 112 is located in the rear of the switching connector 111. Two sets of one-way meshing teeth 110 are fixedly connected to the front of the two sets of switching connectors 111 respectively, and mesh with the two sets of ratchet rings 109 arranged in opposite directions respectively. The switching screw 116 is rotatably connected to the inner rear end of the experimental chamber body 101. The switching sleeve 117 is threaded and sleeved on the outside of the switching screw 116. The front and rear ends of the outer side of the switching screw 116 are provided with external threads with opposite directions of rotation, which are used to simultaneously control the two sets of switching linkages 114 to move in opposite directions. The switching sleeve 117 is also fixedly connected to the switching linkage 114. The number of teeth of the ratchet ring 109 is set so that the rotating shaft 106 has an adjustment interval of 15° during rotation.

[0057] The fitting groove 107 is formed on the upper surface of the rotating shaft 106 and has a square groove structure. The three sets of locking grooves 108 are formed on the outer side of the rotating shaft 106 in a circumferentially evenly distributed structure and pass through the fitting groove 107. A fitting shaft 203 is fixedly connected to the lower surface of the support plate 201. A fitting block 204 is fixedly connected below the fitting shaft 203 and fits into the fitting groove 107. The lower end of the fitting shaft 203 fits into the upper end of the rotating shaft 106. The inner side of the fitting shaft 203 is a movable fitting structure with three sets of circumferentially distributed locking blocks 207. The edge of the locking block 207 away from the axis of the fitting shaft 203 is rounded, and the lower rounded corner allows the locking block 207 to be pressed down and inserted into the locking groove 108. The end of the locking block 207 near the axis of the fitting shaft 203 is fixedly connected to the disassembly and assembly bracket 206, and the other side of the disassembly and assembly bracket 206 is fixedly connected to the disassembly and assembly spring 205. The locking block 207 and the locking groove 108 are engaged with each other. A linkage pressure ring 208 is movably sleeved on the outer side of the fitting shaft 203. The linkage pressure ring 208 is also moved upward after the external force is removed by a disassembly and reset spring.

[0058] The support frame 200 is a detachable structure connected to the placement pivot 106, and its disassembly and assembly process is convenient, allowing the experimenter to select different models of support frame 200 according to the experimental needs and combine it with the aging test chamber 100. The installation of the test plate 308 is plug-and-play. The experimental area and the control area are distinguished by the built-in shielding structure of the simulation frame assembly 300, without the need for pre-set wrapping shielding.

[0059] Based on the first embodiment described above, further, in the accurate and final stages of the experiment, the disassembly and assembly of the experimental device are involved. In this invention, due to the different specifications of the support frame 200 for different experimental samples, the support frame 200 needs to have a disassembly and assembly structure. The ease of disassembly and assembly will affect the efficiency of the entire experimental process. In the installation of the support frame 200, the experimenter only needs to insert the interlocking block 204 into the interlocking groove 107. Because the square groove structure can achieve rapid positioning and limit the installation process and the circumferential position after installation, the experimenter continues to press down on the support frame 200. With the rounded corner setting of the interlocking block 207, it can drive the disassembly and assembly spring 205 to compress under pressure, so that the interlocking block 207 enters the interlocking groove 108 area. Under the rebound force of the disassembly and assembly spring 205, the interlocking block 207 and the interlocking groove 108 are achieved, thereby realizing the rapid assembly between the support frame 200 and the placement shaft 106. During the disassembly of the support frame 200, the experimenter only needs to press down the linkage pressure ring 208 to make the linkage pressure ring 208 press the locking block 207 towards the center. With the rounded corners set, the experimenter can lift the support frame 200 to disengage the locking block 207 from the locking groove 108, thereby enabling the quick assembly and disassembly of the support frame 200 and reducing the working time and difficulty of the front and back stages of the experiment. In preparing experimental samples, this invention differs from existing technologies that involve wrapping the board with tape or other materials to distinguish the experimental and control areas. In the initial stage of the experiment, the experimenter only needs to coat the two sides of the experimental board 308, separated by a sealing ring groove, with different materials (water-based paint for the experiment and control material). Then, the experimental board 308 is directly inserted into the mounting groove 307. After installation, an external air pressure push structure inflates the airbag-type sealing ring 309, causing it to expand and seal against the sealing ring groove. This achieves a sealing structure that is sealed after installation, improving sealing performance. At this point, the experimental surface of the experimental board 308 is exposed, while the control surface is covered (i.e., the control surface is hidden inside the mounting bracket 306). No pre-treatment by the experimenter is required, which would otherwise prevent a clear distinction between the experimental and control areas, and could lead to inaccurate experimental data due to material damage during the experiment or wrapping deviations. Secondly, during the initial installation of the experimental plate 308 at different positions, the support frame 200 needs to be rotated so that the partition areas at different positions are sequentially aligned with the opening of the experimental cavity 102, facilitating the installation of the experimental plate 308 by the experimenters. During the rotation of the support frame 200, the experimenters can rotate the switching screw 116 in both directions (in the setting of the switching screw 116, only two rotations are needed to switch the two unidirectional meshing teeth 110, i.e., quickly achieve the forward and reverse switching of the placement shaft 106; and the rear side of the switching screw 116 has pre-marked markings to ensure rotation accuracy; this setting is based on existing mature technology and can be obtained by those skilled in the art without creative effort). Under the cooperation of the threaded structure, the two sets of switching connecting rods 114 can be moved back and forth. Due to the setting of the opposite external threads, it is possible to... The two sets of switching links 114 move toward or in opposite directions, and the ends of the switching links 114 move closer to or further away from the switching seats 111, thereby attracting each other in the attraction area of ​​the positive magnetic block 112 and the negative magnetic block 115, causing the one-way meshing teeth 110 to disengage from the ratchet ring 109, and preventing them from attracting each other in the non-attraction area of ​​the positive magnetic block 112 and the negative magnetic block 115. Under the action of the cutting spring 113, the one-way meshing teeth 110 mesh with the ratchet ring 109. The meshing of the one-way meshing teeth 110 and the ratchet ring 109 can control the corresponding position from rotating in the opposite direction. According to the forward and reverse rotation switching control of the placement shaft 106, the experimenter can rotate the support frame 200 in the forward and reverse directions as needed before and after the experiment, so as to quickly set the separation area of ​​different positions toward the experimenter. By setting up the above structure, the workload and time required for experimental personnel in the accuracy and completion stages are reduced, thereby improving the efficiency of the entire experimental process and providing auxiliary work in the research and development of water-based paints.

[0060] This invention also relates to an experimental method for an aging test system used in the research and development of water-based paints, characterized by comprising the following steps: a. During the aging experiment of water-based paint research and development, the rotary motor drives the face gear 417 to rotate, and under the meshing with the ring face gear 302, it drives the light simulation component 400 to move around the simulation ring frame 301, so that the ultraviolet lamp holder 404 in the light simulation component 400 simulates different time periods in the natural environment at different positions, so that the ultraviolet lamp holder 404 shines on the test board 308 at different angles, simulating sunrise and sunset in the natural environment. When the light simulation component 400 crosses the daytime area, the light beam emitted by the ultraviolet lamp holder 404 can no longer shine on the test surface of the test board 308, that is, the ultraviolet lamp holder 404 can no longer play an aging effect at night. During the continuous movement of the aforementioned lighting simulation component 400, the rotation of the face gear 417 synchronously drives the transmission shaft 418 to rotate, which in turn drives the driven bevel gear 420 to rotate. The rotation of the driven bevel gear 420 in turn drives the transmission gear 421 to rotate, and through the meshing of the transmission gear 421 and the transmission shaft 412, the transmission shaft 412 rotates, which in turn drives the rotating switching seat 405 to rotate. This causes the filter switching seat 406 to rotate during the day, thereby causing different sections of the filter 407 to be in different positions at different times of the day. Since the light emitted by the ultraviolet lamp holder 404 is filtered by the filter 407 before it can illuminate the surface of the experimental board 308, the filter 407 has different filtering characteristics for the light at different positions, enabling the lighting simulation component 400 to simulate the changes in the angle and intensity of sunlight in the natural environment. At night, the UV lamp holder 404 does not function. During this period, the repulsive force between the like poles of the pushing magnetic block 402 and the linkage magnetic block 311 will trigger the start-up circuit of the artificial simulation lamp 310. Due to the setting of multiple linkage magnetic blocks 311 and the time-delay shutdown circuit, the artificial simulation lamp 310 is always in the start-up state during the night. During the night experiment, the artificial simulation lamp 310 emits a beam of light toward the experimental board 308 to simulate the aging effect of water-based paint in the night environment in modern society, thereby achieving an effect that is close to the actual service environment in the research and development experiment of water-based paint.

[0061] b. In the pre- and post-experimental stages of the water-based paint development aging experiment, the experimenters select the experimental apparatus according to the experimental requirements, such as selecting a suitable model of support frame 200 to accommodate the required number of samples. The support frame 200 is connected to the placement shaft 106 through a convenient disassembly and assembly structure. During the installation of the support frame 200, the experimenters only need to press down on the support frame 200. Under the pressure, the locking block 207 is embedded in the locking groove 108 to achieve a firm connection between the two. During the disassembly of the support frame 200, the experimenters only need to first move the linkage pressure ring 208 down to press the locking block 207 toward the axis of the placement shaft 106, and then move the support frame 200 up to disengage the locking block 207 from the locking groove 108, thereby achieving quick and convenient disassembly and assembly of the support frame 200. In setting up the experimental plate 308, unlike the pre-wound method in the prior art, the user only needs to apply the experimental material and then embed the experimental plate 308 into the mounting slot 307 to achieve the exposure and shielding of the experimental surface and the control surface. In the sequential installation of the experimental plate 308 and the device debugging at different positions, the experimenter can adjust the forward and reverse rotation according to the needs. If the number of experimental samples is large, there may be a faster forward rotation speed or a faster reverse rotation speed between the required debugging position and the current position. At this time, the experimenter only needs to quickly rotate the switching screw 116 to switch the position of the two unidirectional meshing teeth 110, that is, switch the engagement and disengagement of the upper and lower sets of unidirectional meshing teeth 110 and the ratchet ring 109 to achieve the forward and reverse rotation switching of the rotating shaft 106. This operation is quick and convenient and takes very little time. With standardized training of the experimenter, the debugging time in the experimental process can be further reduced, thereby assisting the aging experiment of water-based paint research and development. This embodiment is only an optional embodiment based on Embodiment 1. It is intended to solve the problem of insufficient convenience in experimental preparation, finishing and debugging in Embodiment 1 and the prior art, and is used to assist in the aging experiment of water-based paint research and development.

[0062] Experimental example:

[0063] Note: ΔE≥1.5 indicates color difference perceptible to the naked eye; chalking level: Level 0 no chalking, Level 1 slight chalking (visible when rubbed by hand but no tape adhering), Level 2 moderate chalking (small amount of chalk on the tape), Level 3 obvious chalking (the thickness of the chalking layer is about 20-30μm, and there are obvious white chalk on the tape).

[0064]

[0065] Analysis: The closer R² is to 1, the more consistent it is with the trend of natural outdoor aging. Both indicators of this invention exceed 0.93, far superior to the control box's 0.78 / 0.76, proving that the simulation accuracy of this invention is significantly improved.

[0066]

[0067] Conclusion: During the dawn and dusk hours, the present invention effectively simulates the attenuation of short-wave ultraviolet light by atmospheric scattering due to the switching of the filter to the 410nm cutoff wavelength and the combination with large-angle incident light, so that the initial aging rate is in line with the outdoor height. The control box, due to the continuous output of strong ultraviolet light, caused the initial color change to be too fast and the loss of light to be severe, which deviated from reality.

[0068]

[0069] The above data demonstrates that the present invention, through the synergy of a continuously gradient filter and a moving light source, can significantly improve the predictive accuracy of water-based paint aging tests.

[0070] The following are preferred references for some component parameters involved in this invention.

[0071]

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An aging test system for water-based paint research and development, comprising: An aging test chamber (100), a support frame (200), a simulation frame assembly (300), and a light simulation assembly (400) are characterized in that the aging test chamber (100) includes a test chamber body (101), a test chamber (102), and a placement pivot (106), wherein the test chamber (102) is located above the rear side of the test chamber body (101); The placement shaft (106) is rotatably connected to the lower middle position of the experimental chamber (102) and extends downward. A support frame (200) is installed above the placement shaft (106). The support frame (200) includes a support base plate (201) and a partition plate (202). Several sets of partition plates (202) are fixedly connected to the upper surface of the support base plate (201) in a circumferentially evenly distributed structure and are divided into several partition areas. Each of the partitioned areas is equipped with a simulation frame assembly (300), which includes a simulation ring frame (301). The light simulation assembly (400) is arranged in a movable fitting structure at one end of the simulation ring frame (301) near its axis. The light simulation assembly (400) includes a filter (407) with a cutoff wavelength region that changes continuously along the ring direction, which is used to change the spectrum irradiated onto the experimental board (308) during the movement of the light simulation assembly (400).

2. The aging test system for water-based paint research and development as described in claim 1, characterized in that: The experimental chamber (102) is rotatably connected to the experimental box body (101) with a sealing door. After the experimental preparation is completed, the experimental chamber (102) is closed. The simulation frame assembly (300) also includes annular teeth (302), annular slide groove (303), central shaft (304), rotary torsion spring (305), mounting frame (306) and experimental plate (308). The annular surface teeth (302) are fixedly connected to the side of the simulated ring frame (301) away from the center of the support frame (200). The annular groove (303) is opened on the inner side of the simulated ring frame (301). The central shaft (304) is arranged through the radial position of the simulated ring frame (301). The central shaft (304) consists of two sections arranged in the radial position of the simulated ring frame (301). The mounting bracket (306) is rotatably disposed between the upper and lower sets of central shafts (304) and is disposed slightly lower than the axis of the simulated ring frame (301). The rotary torsion spring (305) is disposed between the central shaft (304) and the mounting bracket (306), and drives the mounting bracket to rotate and reset around the rotation axis without the user manually applying external force. The experimental board (308) is a fitted structure set inside the mounting frame (306). Its outer surface is symmetrically divided into a control surface and an experimental surface. The experimental surface is coated with water-based paint, and the control surface is coated with a reference sample or kept as a blank substrate. The experimental surface is exposed and the control surface is covered. The light simulation component (400) includes an arc-shaped slider (401) and a toothed gear (417). The same light-receiving side surface of the experimental plate (308) is divided into an experimental area and a control area by a sealing ring groove. The experimental area is coated with the water-based paint to be tested, and the control area can be coated with a reference sample or remain as a blank substrate. The mounting bracket (306) shields the control area and exposes the experimental area in the installed state, so that the experimental area is exposed to light, humidity and spray aging. The control area serves as an unaged or reference control area. The face gear (417) is rotated by a rotary motor and is located at one end away from the center of the support frame (200). The face gear (417) meshes with the annular face gear (302). The meshing of the face gear (417) and the annular face gear (302) causes the light simulation component (400) to move. The arc-shaped slider (401) and the annular slide groove (303) are movably engaged with each other.

3. The aging test system for water-based paint research and development as described in claim 2, characterized in that: The experimental chamber (102) has a collection groove (103) at the lower end, which is a trapezoidal structure with a wider top and narrower bottom cross-section. The collection groove (103) has a flow guide ring groove (104) at the lower end of the coaxial position of the rotating shaft (106). The flow guide ring groove (104) has a flow guide hole (105) at the lower end of the flow guide ring groove (104). The flow guide ring groove (104) is a recessed structure that collects the flow guide hole (105). The lower end of the guide hole (105) is connected to the external receiving water tank. The experimental chamber (102) is also equipped with an atomizing nozzle, which atomizes the liquid medium into the experimental chamber (102) according to the experimental requirements.

4. The aging test system for water-based paint research and development as described in claim 2, characterized in that: The lighting simulation component (400) also includes a rotating seat (403), an ultraviolet lamp holder (404), a rotating switching seat (405), and a filter switching seat (406). The two sets of rotating seats (403) are fixedly connected to the lower part of the arc-shaped slider (401). The ultraviolet lamp holder (404) is fixedly disposed between two sets of rotating seats (403). The ultraviolet lamp holder (404) is positioned with its light directed toward the center of the simulation ring frame (301). The rotating switching seat (405) is also disposed between two sets of rotating seats (403) and is rotatably connected. The filter switching seat (406) is fixedly connected to the end of the rotating switching seat (405) away from its axis of rotation. The filter (407) is disposed inside the filter switching seat (406). The filter (407) includes a quartz glass substrate and a dielectric film. The dielectric film is deposited on the quartz glass substrate by ion beam sputtering. Along the annular direction, the main cutoff wavelength of the film system changes continuously and linearly from one end to the other: the cutoff wavelength at one end is 410nm (the transmission spectrum simulates the morning and evening spectrum of atmospheric mass AM10, and ultraviolet and short-wave visible light are greatly attenuated), and the cutoff wavelength at the other end is 290nm (the transmission spectrum simulates the noon spectrum of atmospheric mass AM1, and ultraviolet light is almost fully transparent). The middle region corresponds to the intermediate spectrum such as AM1.5 and AM2. The gradient change rate of the cutoff wavelength is approximately 0.4nm cutoff wavelength drift per millimeter of movement. The face gear (417) is also connected to a transmission shaft (418) at its axis downwards. The lower outer end of the transmission shaft (418) is fitted with a drive bevel gear (419). The drive bevel gear (419) is meshed with a driven bevel gear (420) on the side of the rotating seat (403). The driven bevel gear (420) is coaxially linked with a transmission gear one (421) on the side near the rotating seat (403). A transmission gear two (422) is meshed below the transmission gear one (421). A transmission shaft two (412) is connected at the axis of the transmission gear two (422). The transmission shaft two (412) is fixedly connected to the rotary switching seat (405) and synchronously transmits the rotation of the transmission shaft two (412) to the rotary switching seat (405).

5. The aging test system for water-based paint research and development as described in claim 4, characterized in that: The simulation frame assembly (300) also includes an artificial simulation light (310), a linkage magnetic block (311), a linkage push base (312), a conductive block (313), a reset cut-off spring (314), and a conductive cable (315). The artificial simulation light (310) is located inside the simulation ring frame (301), and its arc length corresponds to the preset nighttime period area on the simulation ring frame (301). The linkage magnetic block (311) is a movable interlocking structure set inside the simulation ring frame (301) and located on the side of the non-artificial simulation lamp (310). The linkage magnetic block (311) is set in several groups and is distributed in a circular shape. The linkage push seat (312) is fixedly connected to the side of the linkage magnetic block (311) away from the center of the simulation ring frame (301). One end of the reset cut-off spring (314) is fixedly connected to the other end of the linkage push base (312). The other end of the reset cut-off spring (314) is also a fixed structure and is set in the electrical groove opened inside the simulated ring frame (301). Two sets of conductive blocks (313) are respectively set at both ends of the electrical groove, and one conductive block (313) is fixedly connected to the linkage push base (312). Both of the conductive blocks (313) are electrically connected to the artificial simulation lamp (310) through conductive cables. The simulation ring frame (301) also has a built-in battery to provide working power to the artificial simulation lamp (310). Several pairs of the conductive blocks (313), the artificial simulation lamp (310) and the battery are connected in parallel circuit. The arc-shaped slider (401) is fixedly connected to a push magnetic block (402) on the inner side of one end facing the simulation ring frame (301). The push magnetic block (402) and the linkage magnetic block (311) have the same magnetic properties on opposite sides. After the two are set relative to each other, they provide magnetic thrust, thereby enabling the two conductive blocks (313) to overcome the rebound force of the reset cut-off spring (314) and make contact to realize the conduction of the working circuit of the artificial simulation lamp (310). The artificial simulation lamp (310) also has a built-in delay shut-off circuit to keep the artificial simulation lamp (310) always on during the movement and switching of the light simulation component (400).

6. The aging test system for water-based paint research and development as described in claim 5, characterized in that: The lighting simulation assembly (400) also includes a linkage arc seat (408), a pneumatic pusher (409), a pneumatic plunger (410), a pusher return spring (411), a pneumatic conduit (413), a pneumatic telescopic rod (414), a telescopic rod body (415), and a light-reducing curtain (416). The two sets of linkage arc seats (408) and rotary switching seats (405) are concentrically arranged and fixedly connected. The arc length of the linkage arc seat (408) is set according to the required duration of light irradiance reduction. The part box is fixedly connected to the side of the arc slider (401) away from the simulation ring frame (301). The pneumatic push head (409) is a movable fitting structure set inside the part box. The pneumatic plunger (410) is fixedly connected to the bottom of the pneumatic pusher (409), the pusher return spring (411) is located below the pneumatic plunger (410), the light curtain (416) is movably fitted into the lower end of the inner side of the parts box, and the telescopic rod body (415) is fixedly connected to one end of the non-exposed side of the light curtain (416). The pneumatic telescopic rod (414) is sleeved on the outside of the telescopic rod body (415). The pneumatic conduit (413) is connected between the pneumatic telescopic rod (414) and the cavity where the push head return spring (411) is located. When the pneumatic plunger (410) moves down, the gas inside the cavity is guided through the pneumatic conduit (413), thereby pushing the telescopic rod body (415) to move linearly and pushing out the light curtain (416) so that it is located below the ultraviolet lamp holder (404). The telescopic rod body (415) is also sleeved on the outside of the return spring for resetting the light curtain (416).

7. The aging test system for water-based paint research and development as described in claim 2, characterized in that: The mounting bracket (306) has a mounting groove (307) on its upper surface. The experimental plate (308) is fitted inside the mounting groove (307). A sealing ring groove is provided in the middle of the outer side of the experimental plate (308). An airbag-type sealing ring (309) is fitted inside the sealing ring groove. The airbag-type sealing ring (309) is inflated by an external air pressure push structure. After the mounting bracket (306) is reset by the rotation torsion spring (305), its light illumination surface is perpendicular to the diameter of the simulated ring frame (301) and is offset relative to the central axis (304).

8. The aging test system for water-based paint research and development as described in claim 1, characterized in that: The aging test chamber (100) also includes a fitting groove (107), a locking groove (108), a ratchet ring (109), a one-way meshing tooth (110), a switching connector (111), a positive magnetic block (112), a cutting spring (113), a switching connecting rod (114), a negative magnetic block (115), a switching screw (116), and a switching sleeve (117). Both sets of ratchet rings (109) are sleeved on the outside of the placement shaft (106) and are set in opposite directions. Both sets of switching links (114) are movable and set inside the experimental box body (101). The negative pole magnet (115) is fixedly connected to the front end of the switching link (114). The cutting spring (113) is set in front of the negative pole magnet (115). The switching connector (111) is located on the front side of the cutting spring (113). Both ends of the cutting spring (113) are fixed structures. The positive magnetic block (112) is located on the rear side of the switching connector (111). The two sets of one-way meshing teeth (110) are fixedly connected to the front side of the two sets of switching connectors (111) respectively, and mesh with the two sets of ratchet rings (109) arranged in opposite directions respectively. The switching screw (116) is rotatably connected to the inner rear end of the experimental box body (101). The switching sleeve (117) is threaded and fitted onto the outside of the switching screw (116). The front and rear ends of the outer side of the switching screw (116) are provided with external threads of opposite directions, which are used to simultaneously control the two sets of switching links (114) to move in opposite directions. The switching sleeve (117) is also fixedly connected to the switching link (114). The number of teeth of the ratchet ring (109) is set so that the placement shaft (106) presents an adjustment interval of 15° during rotation.

9. The aging test system for water-based paint research and development as described in claim 8, characterized in that: The fitting groove (107) is opened on the upper surface of the placement shaft (106) and is a square groove structure. The three sets of locking grooves (108) are equally distributed on the outer side of the placement shaft (106) and are set through the fitting groove (107). The lower surface of the support plate (201) is fixedly connected to a fitting shaft (203), and a fitting block (204) is fixedly connected below the fitting shaft (203) and fits into the fitting groove (107). The lower end of the fitting shaft (203) fits into the upper end of the placement shaft (106). The inner side of the fitting shaft (203) is a movable fitting structure with three sets of locking blocks (207) evenly distributed in a circle. The locking block (207) has a rounded edge at one end away from the axis of the fitting shaft (203), and the lower rounded corner allows the locking block (207) to be pressed down and inserted into the locking groove (108). The locking block (207) is fixedly connected to a disassembly and assembly bracket (206) at one end near the axis of the fitting shaft (203), and a disassembly and assembly spring (205) is fixedly connected to the other side of the disassembly and assembly bracket (206). The locking block (207) and the locking groove (108) fit together. The outer side of the fitting shaft (203) is movably sleeved with a linkage pressure ring (208), and the linkage pressure ring (208) is also moved upward after the external force is removed by a disassembly and reset spring.

10. The experimental method of the aging test system for water-based paint research and development as described in any one of claims 1-9, characterized in that: Includes the following steps: a. Install the experimental panel (308) coated with water-based paint onto the mounting bracket (306) and make the experimental area of ​​the experimental panel (308) face the light simulation component (400). b. Control the meshing and rotation of the face gear (417) and the ring face gear (302) to move the light simulation component (400) along the simulation ring frame (301) to change the irradiation angle of the ultraviolet lamp holder (404) relative to the experimental plate (308); c. During the movement of the light simulation component (400), the rotating switch seat (405) is driven to rotate by the transmission shaft one (418), the active bevel gear (419), the driven bevel gear (420), the transmission gear one (421), the transmission gear two (422), and the transmission shaft two (412), so that different cutoff wavelength regions of the filter (407) enter the light output path of the ultraviolet lamp holder (404); d. When the light simulation component (400) enters the preset nighttime area, the ultraviolet lamp holder (404) stops or reduces its output, and the artificial simulation lamp (310) is turned on by the magnetic action of the push magnetic block (402) and the linkage magnetic block (311). e. Perform the above light simulation process in a cycle according to the preset aging cycle, and take out the experimental board (308) after the experiment is completed to test the aging performance.

Images