Integrated room-temperature vulcanized sealant thermal cracking test device

Abstract

The utility model discloses an integrated room temperature vulcanized sealant thermal cracking test device which comprises a test box, a test chamber is arranged in the test box, a thermal cracking tester is placed in the test chamber, and a temperature and humidity regulation and control unit is arranged on one side of the test box and used for regulating and controlling the temperature and the humidity in the test chamber; a temperature and humidity control panel is arranged on one side of the front surface of the test box, and is electrically connected with the temperature and humidity regulation and control unit; one side of the test box is further provided with a pressurization connector used for being connected with a pressurization air source, the other end of the pressurization connector is communicated with a thermal cracking tester through an air pipe, and the air pipe is connected with a pressure gauge. The temperature and humidity regulation and control unit is arranged to control the temperature, the humidity and the test time of the test chamber, and the pressurization interface and the pressure gauge are designed on the test chamber body, so that the thermal cracking tester is prevented from being moved into a drying oven after manual pressurization is completed, and the pressure change condition in the heating process can be observed through the pressure gauge in the test process.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to an integrated room temperature vulcanized sealant thermal cracking test device. Background Art

[0002] Room temperature vulcanized sealant is a new type of silicone elastomer, the main feature of which is that it can be cured at room temperature without heating or pressurization. This sealant is used as an adhesive and sealant, and is suitable for sealing and anti-vibration in various fields such as electrical appliances, electronic products, automobiles, and mechanical industries. It is also widely used in the aerospace field.

[0003] Among the test methods for determining the application and performance of room temperature vulcanized sealants in the SAE aerospace standard, there is a thermal crack test. The specific method of the experiment is: first, a center hole 12 with a diameter of 6.4 mm is drilled in the center of an AMS 4049 aluminum alloy plate 11 with a size of 1.0 mm × 89 mm × 89 mm; a sealant with a thickness of 3.2 mm and a diameter of 51 mm is coated on the surface of the aluminum alloy plate 11, and then cured at a temperature of 25°C ± 2°C and a humidity of 50% ± 5% to form a sealing film 13. Subsequently, after the specimen is immersed and treated at high temperature, it is taken out and immediately installed in a thermal crack tester (such as Figure 1 ) and pressurize the test piece to 69kPa with a pressure regulator to pressurize the test piece; then put the test piece and the thermal cracking tester into an oven at 121℃±1℃ (pressure and oven temperature need to be provided according to customer needs). Finally, take out the test piece and cool it under appropriate temperature and humidity conditions, and observe whether there are bubbles or sponge phenomena on the sealant film, the pressure changes of the pressure gauge and the height changes of the sealant film.

[0004] This method requires that the thermal cracking tester be connected to a pressurizing device separately, and the pressure be controlled by closing a valve, and then the tester be placed in an oven for heating. This operation is extremely inconvenient, and it is impossible to monitor the change in pressure of the sealant during heating and the change in height of the sealant film. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides an integrated room temperature vulcanized sealant thermal cracking test device, which simplifies the manual connection operation and provides a set of efficient equipment for the performance test research of aircraft room temperature vulcanized sealant.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0007] An integrated room temperature vulcanized sealant thermal crack test device comprises a test box, a test cabin is provided in the test box, a thermal crack tester is placed in the test cabin, a temperature and humidity control unit is provided on one side of the test box, and the temperature and humidity control unit is used to control the temperature and humidity in the test cabin; a temperature and humidity control panel is provided on the front side of the test box, and the temperature and humidity control panel is electrically connected to the temperature and humidity control unit; a pressurization interface is also provided on one side of the test box, and the pressurization interface is used to connect a pressurized air source, and the other end of the pressurization interface is connected to the thermal crack tester through an air pipe, and a pressure gauge is connected to the air pipe.

[0008] Furthermore, a transparent window is provided on the front of the test box.

[0009] Furthermore, a height indicating rod is provided above the thermal burst tester, and the height indicating rod is movably arranged above the center of the thermal burst tester.

[0010] Furthermore, a scale line is provided on the upper portion of the height indicating rod.

[0011] Furthermore, a sensor is provided on the inner wall of the test chamber, and the height indicator rod touches the sensor after rising to a preset height.

[0012] Furthermore, a height alarm is provided on the front of the test box, and the height alarm is electrically connected to the sensor. When the height indicator rod touches the sensor, the height alarm sends out an alarm signal.

[0013] Preferably, the height alarm is a warning light.

[0014] Another preferred embodiment is that the height alarm is a buzzer.

[0015] Preferably, the height indicator rod is in an inverted "L" shape, and the sensor is provided on the upper part of one side wall of the test chamber.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model places a thermal burst tester in a test box, and the test box is provided with a temperature and humidity control unit and a pressurization interface, which can provide temperature and humidity control and pressure for the test, and can observe the pressure change during the test, reduce manual connection operations, and improve the efficiency of the performance test of the room temperature vulcanized sealant of the aircraft.

[0018] The test box in the utility model is provided with a transparent window, which can monitor the pressure change and the height change of the sealing film during the heating process.

[0019] The utility model is provided with a height indicating rod, and during the test process, the height of the expansion of the sealing film can be observed; and the height alarm can monitor whether the expansion of the sealing film exceeds the height limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a thermal burst tester in the prior art;

[0022] Figure 2 It is a structural schematic diagram of an embodiment of the utility model;

[0023] Figure 3 It is the structural diagram of the specimen before the test;

[0024] Figure 4 It is a schematic diagram of the structure of the test after the test;

[0025] Figure 5 It is a structural diagram of the height indicator rod.

[0026] Figure numerals: 1-thermal burst tester, 2-temperature and humidity control panel, 3-pressurization interface, 4-air pipe, 5-pressure gauge, 6-transparent window, 7-height indicator rod, 8-scale line, 9-sensor, 10-height alarm, 11-aluminum alloy plate, 12-center hole, 13-sealing film. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0028] An integrated room temperature vulcanized sealant thermal cracking test device, such as Figure 2As shown, it includes a test box, a test chamber is provided in the test chamber, a thermal burst tester 1 is placed in the test chamber, a temperature and humidity control unit is provided on one side of the test chamber, the temperature and humidity control unit is used to control the temperature and humidity in the test chamber, a temperature and humidity control panel 2 is provided on the front side of the test chamber, and the temperature and humidity control panel 2 is electrically connected to the temperature and humidity control unit; a pressurization interface 3 is also provided on one side of the test chamber, the pressurization interface 3 is used to connect the pressurized air source, the other end of the pressurization interface 3 is connected to the thermal burst tester 1 through the air pipe 4, and the air pipe 4 is connected to a pressure gauge 5; preferably, the pressure gauge 5 is a digital pressure gauge. During the test, after the prepared test piece is fixed on the thermal burst tester 1, the pressurized air source is connected to the pressurization interface 3 to pressurize the test piece, and the pressure value is read through the pressure gauge 5; then the temperature and humidity in the test chamber are adjusted and maintained by the temperature and humidity control unit to meet the test requirements. This test device can avoid moving the thermal burst tester to the oven after completing the artificial pressurization, and the pressure change during the heating process can also be observed through the pressure gauge during the test.

[0029] Furthermore, a transparent window 6 is provided on the front of the test box, through which the deformation of the sealing film during the test can be observed.

[0030] Furthermore, a height indicator rod 7 is provided above the thermal burst tester 1. Figure 2 , Figure 3 As shown, the height indicator rod 7 is movably arranged above the center of the thermal burst tester 1, and a scale line 8 is arranged on the upper part of the height indicator rod 7. When the sealing film expands due to heat, the height indicator rod 7 is lifted up through the center hole of the test plate, and the expansion height of the sealing film can be observed through the scale line 8 on the height indicator rod 7; further, a sensor 9 is arranged on the inner wall of the test chamber, and the height indicator rod 7 touches the sensor 9 after rising to a preset height; a height alarm 10 is arranged on the front of the test chamber, and the height alarm 10 is electrically connected to the sensor 9. When the height indicator rod 7 touches the sensor 9, the height alarm 10 sends an alarm signal. Preferably, the height alarm 10 is an alarm light or a buzzer. Preferably, the height indicator rod 7 is in an inverted "L" shape, and the sensor 9 is arranged on the upper part of one side wall of the test chamber.

[0031] The use process of the integrated room temperature vulcanized sealant thermal cracking test device of the utility model is as follows:

[0032] A. Prepare the test piece (such as Figure 4 As shown, it includes an aluminum alloy plate 11 and a sealing film 13, and a center hole 12 is opened in the center of the aluminum alloy plate 11, and is installed on a thermal cracking tester 1 in a specimen chamber;

[0033] B. Connect the air compressor to the pressurizing interface 3 for pressurization;

[0034] C. When the pressure of the pressure gauge 5 reaches 69 kPa, set the required temperature, humidity and time for the test through the temperature and humidity control panel 2;

[0035] D. The temperature and humidity control unit controls the temperature of the test chamber. When the temperature and pressure in the test chamber rise, observe the expansion of the sealing film on the test piece and the rising height of the height indicator rod 7 through the transparent window 6; pay attention to the alarm signal of the height alarm 10; if the sample after the test is Figure 5 As shown, the sealing film expands and passes through the center hole of the aluminum alloy plate;

[0036] E. Record the expansion height of the sealing film and observe the changes in the appearance of the sealing film; the test is completed.

[0037] The integrated room temperature vulcanized sealant thermal crack test device of the utility model is provided with a temperature and humidity control unit to control the temperature, humidity and test time of the test chamber. A pressurization interface and a pressure gauge are designed on the test chamber body to eliminate the need for manual pressurization. This avoids moving the thermal crack tester to the oven after completing the manual pressurization. The pressure change during the heating process can also be observed through the pressure gauge during the test. A visible transparent window is designed on the test chamber to observe the test process. The height indicator rod can observe the height of the expansion of the sealing film. When the sealing film expands to a limit due to heat, it touches the sensor to automatically alarm. The utility model overcomes the defects of the prior art that the test device needs to be pressurized separately, the pressure change during the heating process cannot be observed, the expansion height change during the test process cannot be observed, and whether the height limit is exceeded can not be observed. It provides efficient equipment for the performance test research of room temperature vulcanized sealants for aircraft.

[0038] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An integrated room temperature vulcanized sealant thermal cracking test device, characterized in that: It comprises a test box, wherein a test cabin is provided in the test box, a thermal burst tester is placed in the test cabin, a temperature and humidity control unit is provided on one side of the test box, and the temperature and humidity control unit is used to control the temperature and humidity in the test cabin; a temperature and humidity control panel is provided on the front side of the test box, and the temperature and humidity control panel is electrically connected to the temperature and humidity control unit; a pressurization interface is also provided on one side of the test box, and the pressurization interface is used to connect to a pressurized gas source, and the other end of the pressurization interface is connected to the thermal burst tester through an air pipe, and a pressure gauge is connected to the air pipe.

2. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 1, characterized in that: A transparent window is arranged on the front of the test box.

3. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 1 or 2, characterized in that: A height indicating rod is arranged above the thermal burst tester, and the height indicating rod is movably arranged above the center of the thermal burst tester.

4. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 3, characterized in that: The upper part of the height indicating rod is provided with scale lines.

5. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 3, characterized in that: A sensor is provided on the inner wall of the test chamber, and the height indicator rod touches the sensor after rising to a preset height.

6. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 5, characterized in that: A height alarm is arranged on the front of the test box, and the height alarm is electrically connected to the sensor. When the height indicator rod touches the sensor, the height alarm sends out an alarm signal.

7. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 6, characterized in that: The height alarm is a warning light.

8. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 6, characterized in that: The height alarm is a buzzer.

9. The integrated room temperature vulcanized sealant thermal cracking test device according to claim 5, characterized in that: The height indicator rod is in an inverted "L" shape, and the sensor is arranged on the upper part of one side wall of the test chamber.

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