A cyclic exposure tester for detecting weatherability of water-based paint

Abstract

The utility model discloses a kind of water-based paint weatherability detection's cycle exposure tester, including test box, the inside of test box is provided with light source system and spraying system;Further include: rotatable support, inside the box is installed, for driving sample rotation;Sample fixture assembly, rotation is installed in the top of rotatable support, sample fixture assembly is connected with rotatable support by angle adjusting mechanism, sample fixture assembly is configured to automatically change the included angle of sample and horizontal plane by angle adjusting mechanism;Collection analysis unit, it includes conductivity tester collection pool and conductivity sensor.The utility model provides a kind of water-based paint weatherability detection's cycle exposure tester, by setting angle adjusting mechanism, it can automatically drive sample to switch between "accumulation water test" and "aging test" two states, truly simulates the stress and aging environment of outdoor coating under different inclination, improves the authenticity of test data.

Description

Technical Field

[0001] This utility model relates to the field of coating testing technology, and in particular to a cyclic exposure tester for testing the weather resistance of water-based coatings. Background Technology

[0002] Water-based coatings are widely used due to their environmentally friendly properties, and their weather resistance directly affects the coating's service life and appearance. In practical applications, coatings are not only affected by natural climate factors such as sunlight (ultraviolet rays) and rain, but also face different water accumulation or drainage conditions depending on the application location. For example, horizontal coatings are prone to water accumulation, leading to prolonged immersion and accelerated aging; while vertical coatings are mainly exposed to sunlight and rain.

[0003] Existing coating weathering testers (such as xenon lamp aging chambers and ultraviolet aging chambers) typically use sample holders with a fixed angle, resulting in a relatively fixed sample position during testing. This testing method has the following drawbacks:

[0004] It cannot simulate the actual working conditions of the coating at different tilt angles, especially the complex environment of alternating horizontal water immersion and vertical drainage scouring.

[0005] It is difficult to quantitatively analyze the substances dissolved during the coating aging process, and there is a lack of real-time monitoring methods for the degree of coating degradation.

[0006] Therefore, it is particularly important to develop a cyclic exposure tester that can simulate multi-angle working condition changes and has the function of analyzing aging products. Utility Model Content

[0007] Based on this, it is necessary to provide a cyclic exposure tester for testing the weather resistance of water-based coatings, which can automatically switch between water accumulation test state and aging test state by setting a rotatable support and angle adjustment mechanism, and detect aging leachates by combining a collection and analysis unit.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A cyclic exposure tester for testing the weather resistance of water-based coatings includes:

[0010] The test chamber, which is equipped with a light source system and a spray system, also includes:

[0011] A rotatable support, installed inside the housing, is used to drive the sample to rotate around the central axis;

[0012] A sample clamp assembly is rotatably mounted on top of a rotatable support. The sample clamp assembly is connected to the rotatable support via an angle adjustment mechanism. The sample clamp assembly is configured to automatically change the angle between the sample and the horizontal plane via the angle adjustment mechanism.

[0013] The collection and analysis unit includes a conductivity meter collection cell and a conductivity sensor.

[0014] Furthermore, the angle adjustment mechanism drives the sample fixture assembly to perform at least two test simulation states:

[0015] Water accumulation test phase: Drive the sample clamp assembly to rotate to an angle of ° to ° with the horizontal plane to simulate a flat water accumulation state;

[0016] Aging test phase: Drive the sample fixture assembly to rotate to an angle of ° to ° with the horizontal plane to simulate vertical drainage and vertical lighting conditions.

[0017] Furthermore, the light source system includes one of a fluorescent lamp and an ultraviolet lamp, and the spray system includes a water pump and a spray pipe connected to the output end of the water pump. The spray pipe extends into the interior of the test chamber and is provided with a plurality of atomizing nozzles facing the sample clamp assembly.

[0018] Furthermore, the sample clamp assembly includes a frame with an internal groove, an elastic clamp fixedly mounted on the inner sidewall of the frame, the elastic clamp providing elastic potential energy to fix the test sample plate within the frame, and the collection pool fixedly connected to the bottom of the frame and communicating with the groove.

[0019] Furthermore, the elastic clamp includes a support portion and a soft steel spring sheet connected to one end of the support portion, the soft steel spring sheet being V-shaped in general.

[0020] Furthermore, the rotatable support includes a fixed base, and a bearing bracket is rotatably mounted on the top of the fixed base via a bearing. The rotatable support also includes a gear disk mounted on the bearing bracket and a servo motor mounted on the fixed base. The output end of the servo motor is fixedly connected to a gear that meshes with the gear disk.

[0021] Furthermore, the angle adjustment mechanism includes a lead screw rotatably connected to the top of the support bracket, a lead screw slide is threaded to the outer wall of the lead screw, a push rod is hinged to the bottom of the lead screw slide, and one end of the push rod is hinged to the frame;

[0022] The angle adjustment mechanism also includes a second servo motor installed on the side wall of the support bracket. The output end of the second servo motor is fixedly connected to a second gear. The outer wall of the second gear is meshed with a gear disk, and the gear disk is fixedly installed on one end of the lead screw.

[0023] Furthermore, rollers are installed on both sides of the lead screw slide, and the two rollers are rolled on the surface of the support bracket to keep the lead screw slide in a balanced state.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention provides a cyclic exposure tester for testing the weather resistance of water-based coatings. By setting an angle adjustment mechanism, it can automatically drive the sample to switch between "water accumulation test" and "aging test" states, realistically simulating the stress and aging environment of outdoor coatings at different tilt angles, thus improving the authenticity of the test data. A rotatable support allows the sample to rotate within the chamber, ensuring more uniform light and water exposure and avoiding localized test deviations. An additional collection and analysis unit collects runoff liquid from the sample surface through a collection pool and uses a conductivity sensor to monitor the liquid conductivity in real time. Changes in conductivity reflect the dissolution of film-forming substances or additives in the coating, providing new data support for the quantitative evaluation of the coating's weather resistance. Elastic clamps can quickly fix sample plates of different sizes, facilitating sample replacement. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of a cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model;

[0027] Figure 2 A schematic diagram of the second state structure of a cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model;

[0028] Figure 3 A schematic diagram of the main structure of a cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model;

[0029] Figure 4 A schematic diagram of the usage state structure of a cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model;

[0030] Figure 5 A cross-sectional structural diagram of a cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model.

[0031] The markings in the diagram are explained as follows:

[0032] 1. Test chamber; 11. Light source system; 12. Spray system;

[0033] 2. Rotatable support; 21. Fixed base; 22. Bearing bracket; 23. Gear disk; 24. Servo motor; 25. Gear;

[0034] 3. Sample clamp assembly; 31. Frame; 32. Elastic clamp; 321. Support; 322. Soft steel spring;

[0035] 4. Angle adjustment mechanism; 41. Lead screw; 42. Lead screw slide; 43. Push rod; 44. Servo motor II; 45. Gear II; 46. Gear disk;

[0036] 5. Collection and analysis unit; 51. Conductivity tester; 52. Collection cell; 53. Conductivity sensor. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0038] Example 1

[0039] Please refer to Figure 1-5 A cyclic exposure tester for testing the weather resistance of water-based coatings, comprising:

[0040] Test chamber 1, the interior of which is equipped with a light source system 11 and a spray system 12; also includes:

[0041] The rotatable support 2 is installed inside the test chamber 1 and is used to drive the sample to rotate around the central axis;

[0042] The sample clamp assembly 3 is rotatably mounted on the top of the rotatable support 2. The sample clamp assembly 3 is connected to the rotatable support 2 through the angle adjustment mechanism 4. The sample clamp assembly 3 is configured to automatically change the angle between the sample and the horizontal plane through the angle adjustment mechanism 4.

[0043] The collection and analysis unit 5 includes a conductivity tester 51, a collection cell 52, and a conductivity sensor 53.

[0044] The light source system 11 includes one of a fluorescent lamp and an ultraviolet lamp, and the spray system 12 includes a water pump and a spray pipe connected to the output end of the water pump. The spray pipe extends into the test chamber 1 and is provided with several atomizing nozzles facing the sample clamp assembly 3.

[0045] Angle adjustment mechanism 4 drives sample clamp assembly 3 to perform at least two test simulation states:

[0046] Water accumulation test phase: Drive the sample clamp assembly 3 to rotate to an angle of 0° to 15° with the horizontal plane to simulate a flat water accumulation state;

[0047] Aging test phase: Drive the sample clamp assembly 3 to rotate to an angle of 75° to 90° with the horizontal plane to simulate the vertical drainage and vertical lighting conditions.

[0048] Example 2

[0049] The cyclic exposure tester for testing the weather resistance of water-based coatings provided in Embodiment 1 is further optimized. Specifically, the sample clamp assembly 3 includes a frame 31 with an internal groove. An elastic clamp 32 is fixedly installed on the inner side wall of the frame 31. The elastic clamp 32 provides elastic potential energy to fix the test sample plate in the frame 31. The collection pool 52 is fixedly connected to the bottom of the frame 31 and communicates with the groove.

[0050] The elastic clamp 32 includes a support part 321 and a soft steel spring 322 connected to one end of the support part 321. The soft steel spring 322 is V-shaped in general.

[0051] When installing the sample, press the V-shaped spring to cause it to deform elastically, place the sample plate in, and then release it. The V-shaped spring will then press tightly against the edge of the sample plate under the action of elasticity, achieving quick fixation.

[0052] The bottom of the frame 31 has an opening, and the collection pool 52 is fixedly connected to the bottom of the frame 31 and communicates with the opening. A conductivity sensor 53 is installed inside or outside the collection pool 52, and the sensor is connected to an external conductivity tester 51 via a wire.

[0053] When spraying or accumulating water is simulated, the water on the sample surface flows into the collection pool 52. The conductivity sensor 53 monitors the conductivity of the water in real time, and the data is transmitted to the conductivity tester 51 for analysis.

[0054] As the coating ages, soluble salts or degradation products in the coating dissolve into the water, causing changes in conductivity, which is used as a quantitative indicator of weather resistance.

[0055] Example 3

[0056] The cyclic exposure tester for testing the weather resistance of water-based coatings provided in Embodiment 1 or 2 is further optimized by installing a rotatable support 2 to achieve self-rotation.

[0057] Specifically, the rotatable support 2 includes a fixed base 21, and a bearing bracket 22 is rotatably mounted on the top of the fixed base 21 via a bearing. The rotatable support 2 also includes a gear disk 23 mounted on the bearing bracket 22 and a servo motor 24 mounted on the fixed base 21. The output end of the servo motor 24 is fixedly connected to a gear 25 that meshes with the gear disk 23.

[0058] To achieve self-rotation, when the servo motor 24 is working, it drives the gear disk 23 to rotate, thereby causing the support bracket 22 and its components to rotate horizontally as a whole, so that the sample can receive light and spray evenly. A support shaft is installed at the center of the support bracket 22, and a bearing seat is installed in the middle of the fixed base 21. The support shaft is installed in the bearing seat through the bearing to achieve rotation, thereby ensuring the stability of the support bracket 22.

[0059] Example 4

[0060] The cyclic exposure tester for testing the weather resistance of water-based coatings provided in Embodiment 3 is further optimized. The angle adjustment mechanism 4 includes a lead screw 41 rotatably connected to the top of the support bracket 22. A lead screw slide 42 is threadedly connected to the outer wall of the lead screw 41. A push rod 43 is hinged to the bottom of the lead screw slide 42. One end of the push rod 43 is hinged to the frame 31.

[0061] The angle adjustment mechanism 4 also includes a servo motor 44 installed on the side wall of the support bracket 22. The output end of the servo motor 44 is fixedly connected to a gear 45. The outer wall of the gear 45 is meshed with a gear disk 46. The gear disk 46 is fixedly installed on one end of the lead screw 41.

[0062] Rollers are installed on both sides of the lead screw slide 42. The two rollers are rolled on the surface of the support bracket 22 to keep the lead screw slide 42 in a balanced state.

[0063] Specifically, the rollers ensure that the lead screw slide 42 can only slide along the length of the lead screw 41 and cannot rotate. The servo motor 44 rotates forward or backward, driving the lead screw 41 to rotate via gear transmission. The lead screw slide 42 then rises or falls, pushing the push rod 43 to move. The push rod 43 pushes the frame 31 to rotate around its hinge point with the support bracket 22, thereby changing the angle between the frame 31 and the horizontal plane. When the slide rises, the push rod lifts the frame, and the angle decreases, tending towards horizontal; when the slide falls, the frame angle increases, tending towards vertical.

[0064] The usage process of the cyclic exposure tester for testing the weather resistance of water-based coatings provided by this utility model is as follows: Sample installation: The operator opens the door of the test chamber 1, places the sample plate coated with the water-based coating to be tested in the groove of the frame 31, and clamps it in place by the elastic clamp 32.

[0065] Parameter settings: Set the test cycle program on the control panel (not shown), including parameters such as illumination time, spraying time, rotation speed, and angle switching cycle.

[0066] Loop test started:

[0067] Phase 1: Water Accumulation Simulation. The control system commands servo motor 44 to move, driving the lead screw slide 42 to rise. The push rod 43 adjusts the frame 31 to a horizontal angle of about 5° with the horizontal plane to simulate a horizontal plane. At this time, the spray system 12 is activated, and water mist is sprayed onto the sample surface, forming water accumulation due to the gentle angle. Simultaneously, the collection and analysis unit 5 starts working to monitor the conductivity of the water accumulation. This phase is mainly used to evaluate the water resistance performance of the coating under water immersion.

[0068] Phase Two: Aging Simulation. The control system instructs servo motor 244 to reverse its direction, adjusting frame 31 to an angle of approximately 85° with the horizontal plane to simulate the vertical surface; the light source system 11, such as ultraviolet lamps and spray system 12, is activated, and servo motor 12 is activated simultaneously, causing the sample to rotate slowly. This phase simulates natural sunlight and rain erosion, with water on the sample surface rapidly draining into collection pool 52.

[0069] Data Acquisition: Throughout the test, the conductivity sensor 53 continuously collects the conductivity of the liquid flowing across the sample surface and transmits it to an external display or recording device; if the conductivity suddenly increases, it indicates that the coating may have undergone severe degradation or leaching.

[0070] Test complete: After the set number of cycles is reached, the equipment will automatically stop running, and the operator can remove the sample for subsequent appearance inspection or physical performance testing.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; conversely, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A cyclic exposure tester for testing the weather resistance of water-based coatings, comprising: The test chamber (1) is equipped with a light source system (11) and a spray system (12) inside; characterized in that it further includes: A rotatable support (2) is installed inside the test chamber (1) to drive the sample to rotate around the central axis; The sample clamp assembly (3) is rotatably mounted on the top of the rotatable support (2). The sample clamp assembly (3) is connected to the rotatable support (2) via an angle adjustment mechanism (4). The sample clamp assembly (3) is configured to automatically change the angle between the sample and the horizontal plane via the angle adjustment mechanism (4). The collection and analysis unit (5) includes a conductivity tester (51), a collection cell (52), and a conductivity sensor (53).

2. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 1, characterized in that, The angle adjustment mechanism (4) drives the sample clamp assembly (3) to perform at least two test simulation states: Water accumulation test stage: drive the sample clamp assembly (3) to rotate to an angle of 0° to 15° with the horizontal plane to simulate the flat water accumulation state; Aging test phase: Drive the sample clamp assembly (3) to rotate to an angle of 75° to 90° with the horizontal plane to simulate the vertical drainage and vertical lighting conditions.

3. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 1, characterized in that, The light source system (11) includes one of a fluorescent lamp and an ultraviolet lamp. The spray system (12) includes a water pump and a spray pipe connected to the output end of the water pump. The spray pipe extends into the interior of the test chamber (1) and is provided with a plurality of atomizing nozzles facing the sample clamp assembly (3).

4. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 1, characterized in that, The sample clamp assembly (3) includes a frame (31) with an internal groove, and an elastic clamp (32) is fixedly installed on the inner side wall of the frame (31). The elastic clamp (32) provides elastic potential energy to fix the test sample plate in the frame (31). The collection pool (52) is fixedly connected to the bottom of the frame (31) and communicates with the groove.

5. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 4, characterized in that, The elastic clamp (32) includes a support (321) and a soft steel spring (322) connected to one end of the support (321). The soft steel spring (322) is V-shaped in general.

6. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 4, characterized in that, The rotatable support (2) includes a fixed base (21), and a bearing bracket (22) is rotatably mounted on the top of the fixed base (21) via a bearing. The rotatable support (2) also includes a gear disk (23) mounted on the bearing bracket (22) and a servo motor (24) mounted on the fixed base (21). The output end of the servo motor (24) is fixedly connected to a gear (25) that meshes with the gear disk (23).

7. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 6, characterized in that, The angle adjustment mechanism (4) includes a lead screw (41) rotatably connected to the top of the support bracket (22). The outer wall of the lead screw (41) is threaded with a lead screw slide (42). The bottom of the lead screw slide (42) is hinged with a push rod (43). One end of the push rod (43) is hinged to the frame (31). The angle adjustment mechanism (4) also includes a servo motor (44) installed on the side wall of the support bracket (22). The output end of the servo motor (44) is fixedly connected to a gear (45). The outer wall of the gear (45) is meshed with a gear disk (46). The gear disk (46) is fixedly installed on one end of the lead screw (41).

8. The cyclic exposure tester for testing the weather resistance of water-based coatings according to claim 7, characterized in that, Rollers are installed on both sides of the lead screw slide (42), and the two rollers are rolled on the surface of the support bracket (22) to keep the lead screw slide (42) in a balanced state.

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