A testing machine for coating crack resistance test

Abstract

This utility model discloses a testing machine for testing the crack resistance of coatings, including an insulated chamber, a testing platform for placing test samples, and a lifting mechanism for driving the testing platform to move up and down. The insulated chamber has a test opening through which the testing platform passes, and the testing platform moves back and forth between the inside and outside of the insulated chamber via the lifting mechanism. The insulated chamber is equipped with a cooling device and a heating device to control the temperature inside the chamber. Using this utility model, low-temperature crack resistance testing can be performed, with high testing efficiency and reduced testing errors caused by frequent human operation.

Description

Technical Field

[0001] This utility model relates to the field of highway material testing equipment, and in particular to a testing machine for testing the crack resistance of coatings. Background Technology

[0002] In the low-temperature crack resistance test of road marking paint coatings, according to the JT / T 280-2022 standard, the existing test method has the following problems when manually transferring the test plate back and forth between low temperature and room temperature environments:

[0003] Test panels are susceptible to disturbance damage: vibrations or unintentional impacts during manual transfer of test panels may cause micro-cracks or damage to the internal structure of the test panels. These damages are difficult to detect in the early stages, but they can affect the accuracy of the test results in assessing the low-temperature crack resistance of the coating.

[0004] Low experimental efficiency: There are many manual operation steps, including frequent opening and closing of the low temperature chamber, transfer of test plates and timing, which are cumbersome and time-consuming, resulting in low overall experimental efficiency.

[0005] The reliability of the test results is low: due to the uncertainty of damage to the test plate caused by human disturbance, the results of each test may be biased, resulting in poor repeatability and reliability. At the same time, the manual operation process is cumbersome and inefficient.

[0006] Therefore, manual operation inevitably produces disturbances such as vibration and unintentional impacts. These disturbances are difficult to detect but may cause minor damage to the test plate and affect the accuracy of the test results. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a testing machine for coating crack resistance testing, which can perform low-temperature crack resistance testing, and has high testing efficiency and can reduce testing errors caused by frequent human operation.

[0008] To solve the above-mentioned technical problems, this utility model provides a testing machine for testing the crack resistance of coatings, including an insulated box, a testing platform for placing test samples, and a lifting mechanism for driving the testing platform to rise and fall. The insulated box is provided with a test opening through which the testing platform passes, and the testing platform travels between the inside and outside of the insulated box via the lifting mechanism.

[0009] The insulated box is equipped with a refrigeration device and a heating device to control the temperature inside the insulated box.

[0010] As an improvement to the above solution, a sealing plate for closing the test port is also included, the sealing plate being adapted to the test port.

[0011] As an improvement to the above solution, the test platform is provided with a bracket for mounting the sealing plate, and the sealing plate is mounted on the bracket to move up and down with the test platform;

[0012] When the test platform is lowered to a preset height inside the insulation box, the sealing plate moves to the test opening to close the test opening.

[0013] As an improvement to the above solution, the insulated box includes an outer shell and an inner shell disposed within the outer shell, with a closed insulated space formed between the inner shell and the outer shell.

[0014] As an improvement to the above solution, the insulated space is filled with thermal insulation material.

[0015] As an improvement to the above solution, the heating device is a heating tube, a heating wire, or a heating film;

[0016] The heating device is located on the inner wall of the insulated box and surrounds the test platform.

[0017] As an improvement to the above solution, the outer contour of the bracket is adapted to the test port to guide the lifting and lowering movement of the test platform.

[0018] As an improvement to the above solution, a timer and a temperature sensor for controlling the operation of the lifting mechanism are also included, with the temperature sensors evenly distributed inside the insulation box.

[0019] The timer controls the duration of the test platform's stay inside and outside the insulation chamber.

[0020] The operation of the heating and cooling devices is controlled by the temperature sensor.

[0021] As an improvement to the above solution, the lifting mechanism is located inside the insulation box;

[0022] The lifting mechanism is a pneumatic telescopic rod mechanism, a screw drive mechanism, or a hydraulic lifting mechanism.

[0023] As an improvement to the above solution, the insulated box is provided with a device chamber, which is provided with a partition to separate a cooling space and a humidifying space. The device chamber is provided with a cold air vent and a humidifying vent, which are respectively corresponding to the cooling space and the humidifying space.

[0024] The humidification space is equipped with a humidifier for changing the humidity inside the insulated box, and the refrigeration device is installed in the refrigeration space.

[0025] Implementing this utility model has the following beneficial effects:

[0026] This utility model discloses a testing machine, including an insulated box, a testing platform for placing test samples, and a lifting mechanism for driving the testing platform to rise and fall. The insulated box is provided with a test opening through which the testing platform passes. The testing platform moves back and forth between the inside and outside of the insulated box via the lifting mechanism. With this configuration, the test samples can be moved frequently by humans during testing, thereby reducing the interference of uncertainties caused by manual operation.

[0027] Furthermore, the insulated box is equipped with a refrigeration device and a heating device, thereby enabling precise and stable temperature control within the insulated box through combined cooling and heating. Attached Figure Description

[0028] Figure 1 This is a perspective view of the testing machine of this utility model. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] See Figure 1 This utility model provides a testing machine, including an insulated box 1, a testing platform 2 for placing test samples, and a lifting mechanism 3 for driving the testing platform 2 to rise and fall. The insulated box 1 is provided with a test opening 11 for the testing platform 2 to pass through, and the testing platform 2 travels back and forth between the inside and outside of the insulated box 1 through the lifting mechanism 3.

[0031] The insulated box 1 is equipped with a refrigeration device 4 and a heating device 5 to control the temperature inside the insulated box 1.

[0032] Specifically, it also includes a sealing plate 6 for closing the test port 11, the sealing plate 6 being adapted to the test port 11. Preferably, the sealing plate 6 is a hollow plate, and the interior of the sealing plate 6 is filled with heat-insulating material.

[0033] The lifting mechanism 3 is located inside the insulation box 1; the lifting mechanism 3 can be a pneumatic telescopic rod mechanism, a screw drive mechanism, or a hydraulic lifting mechanism 3, etc., which are existing technologies.

[0034] The insulated box 1 includes an outer shell 1a and an inner shell 1b disposed within the outer shell 1a, forming a closed insulated space 1c between the inner shell 1b and the outer shell 1a. The insulated space 1c is filled with thermal insulation material, such as polyurethane foam, fiberglass, asbestos, rock wool, silicate, etc.

[0035] Furthermore, the test platform 2 is provided with a bracket 21 for mounting the sealing plate 6. The sealing plate 6 is mounted on the bracket 21 to move up and down with the test platform 2. When the test platform 2 descends to a preset height inside the insulation chamber 1, the sealing plate 6 moves to the test opening 11 to seal the test opening 11. Therefore, when the test sample needs to be tested inside the insulation chamber 1, the test platform 2 will carry the test sample and remain inside the insulation chamber 1, while the sealing plate 6 just blocks the test opening 11, thereby ensuring the insulation performance of the insulation chamber 1. Preferably, the shape of the test platform 2 is adapted to the test opening 11. When the test sample needs to be transferred outside the insulation chamber 1, the test platform 2 rises to the test opening 11 to seal the test opening 11, in order to maintain the temperature inside the insulation chamber 1 as much as possible. Since the test sample needs to frequently enter and exit the insulation chamber 1, this setting can reduce the energy consumption of the refrigeration device 4 and the heating device 5.

[0036] The heating device 5 can be a heating tube, heating wire or heating film or other heating device. The heating device 5 is located on the inner side wall of the heat preservation box 1 and surrounds the test platform 2 to uniformly regulate the space temperature inside the heat preservation box 1.

[0037] To improve the stability of the test platform 2 during the lifting process, the outer contour of the bracket 21 is adapted to the test port 11 to guide the lifting and lowering activities of the test platform 2.

[0038] The testing machine also includes a timer and a temperature sensor for controlling the operation of the lifting mechanism 3, and the temperature sensor is evenly distributed inside the insulation box 1;

[0039] The timer controls the duration of the test platform 2's stay inside and outside the insulation chamber 1; the temperature sensor controls the operation of the heating device 5 and the cooling device 4. That is, the heating device 5 and the cooling device 4 cool or heat according to the temperature data detected by the temperature sensor inside the insulation chamber 1, thereby preventing the temperature inside the insulation chamber 1 from being too high or too low. The temperature sensor and timer are existing technologies, and their structural principles will not be described in detail here.

[0040] The insulated box 1 is provided with a device chamber 12, and the device chamber 12 is provided with a partition 13 to separate a cooling space and a humidifying space. The device chamber is provided with a cold air vent 121 and a humidifying vent 122 corresponding to the cooling space and the humidifying space, respectively.

[0041] The humidification space is equipped with a humidifier 7 for changing the humidity inside the insulated box 1, and the refrigeration device 4 is installed in the refrigeration space. The humidifier allows for low-temperature crack resistance testing of the coating under different humidity environments, studying the effect of humidity on coating performance. Preferably, the insulated box 1 may also be equipped with an ultraviolet lamp 9. Combined with ultraviolet irradiation, a solar radiation environment is simulated to evaluate the performance changes of the coating under the combined effects of ultraviolet aging and low temperature.

[0042] Preferably, the refrigeration device is a conventional air conditioner. One side of the insulated enclosure is equipped with an equipment box 8 for housing large components. The air conditioner generally includes an indoor unit for blowing cold air and an outdoor unit for refrigeration. Since the outdoor unit is generally a refrigeration compressor and has a certain degree of vibration, the outdoor unit is located inside the equipment box, and the indoor unit is located in the refrigeration space to reduce the vibration impact of the outdoor unit on the insulated enclosure. The water tank of the humidifier can also be placed inside the equipment box for easy water replenishment. Both the device compartment and the equipment box are provided with connecting holes for pipe connections.

[0043] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A testing machine for testing the crack resistance of coatings, characterized in that, It includes an insulated box, a test platform for placing test samples, and a lifting mechanism for driving the test platform to move up and down. The insulated box has a test opening for the test platform to pass through, and the test platform moves back and forth between the inside and outside of the insulated box via the lifting mechanism. The insulated box is equipped with a refrigeration device and a heating device to control the temperature inside the insulated box.

2. The testing machine of claim 1, wherein, It also includes a sealing plate for closing the test port, the sealing plate being adapted to the test port.

3. The testing machine of claim 2, wherein, The test platform is equipped with a bracket for mounting the sealing plate, and the sealing plate is mounted on the bracket to move up and down with the test platform; When the test platform is lowered to a preset height inside the insulation box, the sealing plate moves to the test opening to close the test opening.

4. The testing machine of claim 1, wherein, The insulated box includes an outer shell and an inner shell disposed within the outer shell, forming a closed insulated space between the inner shell and the outer shell.

5. The testing machine of claim 4, wherein, The insulated space is filled with heat-insulating material.

6. The testing machine of claim 1, wherein, The heating device is a heating tube, a heating wire, or a heating film; The heating device is located on the inner wall of the insulated box and surrounds the test platform.

7. The testing machine of claim 3, wherein, The outer contour of the bracket is adapted to the test port to guide the lifting and lowering of the test platform.

8. The testing machine of claim 1, wherein, It also includes a timer and a temperature sensor for controlling the operation of the lifting mechanism, the temperature sensor being evenly distributed inside the insulation box; The timer controls the duration of the test platform's stay inside and outside the insulation chamber. The operation of the heating and cooling devices is controlled by the temperature sensor.

9. The testing machine of claim 1, wherein, The lifting mechanism is located inside the insulated box; The lifting mechanism is a pneumatic telescopic rod mechanism, a screw drive mechanism, or a hydraulic lifting mechanism.

10. The testing machine of claim 1, wherein, The insulated box is equipped with a device chamber, which is divided into a cooling space and a humidifying space by a partition. The device chamber is equipped with a cold air vent and a humidifying vent, which are respectively corresponding to the cooling space and the humidifying space. The humidification space is equipped with a humidifier for changing the humidity inside the insulated box, and the refrigeration device is installed in the refrigeration space.

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