Thermal testing device

Abstract

The utility model discloses a heat testing device which comprises a testing table, and a pressurizing air cylinder, a heat flow tester and an electric heating radiation furnace are sequentially arranged on the testing table. The pressurizing air cylinder is of a cylindrical structure with an opening in one end, the opening end of the pressurizing air cylinder faces the electric heating radiation furnace, and the opening end of the pressurizing air cylinder is provided with a flange plate used for being connected with a test material; the sealed end of the pressurizing air cylinder is communicated with the air path system through an air pipe. The air path system comprises a pressure gauge for displaying the air pressure of the pressurizing air cylinder and a pressure sensor for monitoring the air pressure of the pressurizing air cylinder. During testing, the evacuation slide material is connected to the flange at the opening end of the pressurizing air cylinder, the pressurizing air cylinder is sealed, gas is injected into the pressurizing air cylinder through the gas path system, and the electric heating radiation furnace is used for heating to carry out a heat test, and when the pressure sensor monitors that the pressure in the pressurizing air cylinder suddenly becomes lower, the evacuation slide material is connected to the flange. Therefore, the thermal testing device provided by the utility model can be used for accurately acquiring the failure time of the evacuation slide material.

Description

Technical Field

[0001] The utility model relates to the technical field of material testing machinery, in particular to a thermal testing device. Background Art

[0002] In the prior art, an electric heating radiation furnace is used to directly heat the evacuation slide material for testing, and the failure time is recorded by directly observing the changes on the material surface, which results in a large error. Summary of the invention

[0003] The utility model aims to provide a thermal testing device to solve the problem of large error in the failure test of evacuation slide materials in the prior art.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] A thermal testing device comprises a test bench, on which a pressurized gas cylinder, a heat flow tester and an electric heating radiation furnace are sequentially arranged;

[0006] The booster gas cylinder is a cylindrical structure with one end open, the open end of the booster gas cylinder faces the electric heating radiation furnace, and the open end of the booster gas cylinder is provided with a flange for connecting the test material;

[0007] The sealed end of the booster cylinder is connected to an air circuit system through an air pipe, and the air circuit system includes a pressure gauge for displaying the air pressure of the booster cylinder and a pressure sensor for monitoring the air pressure of the booster cylinder.

[0008] Furthermore, the test bench is also provided with a timer and a controller, and the timer and the pressure sensor are both connected to the controller signal.

[0009] Furthermore, the test bench is provided with two parallel slide rails, and the booster cylinder and the thermal flow tester are connected to the slide rails via a bracket.

[0010] Furthermore, a rotating shaft is provided on the bracket connected to the heat flow tester, and the heat flow tester is connected to the rotating shaft through an insulating plate so that the heat flow tester can rotate.

[0011] Furthermore, a bracket connected to the booster cylinder is provided with an oblong hole along the plumb direction, and the booster cylinder is connected to the oblong hole via bolts.

[0012] Furthermore, two groups of positioning blocks are provided on the slide rail, wherein one group of positioning blocks is located between the thermal flow tester and the electric heating radiation furnace, and the other group of positioning blocks is located on the side of the booster cylinder away from the thermal flow tester.

[0013] Furthermore, the axis of the booster cylinder and the centers of the heat flow tester and the electric heating radiation furnace are on the same straight line.

[0014] Furthermore, the test material is connected to the flange through a connecting piece, and a sealing ring is provided between the connecting piece and the flange.

[0015] Furthermore, a voltage regulator is connected to the electric heating radiation furnace.

[0016] Furthermore, the gas circuit system is also provided with an exhaust valve and a gas source interface.

[0017] According to the above technical scheme, the beneficial effects of the utility model are as follows: when testing, the evacuation slide material is connected to the flange at the open end of the booster cylinder to seal the booster cylinder, gas is injected into the booster cylinder through the air path system, and thermal testing is performed by heating with an electric heating radiation furnace to achieve thermal testing of the evacuation slide material under a preset pressure. When the pressure sensor detects that the pressure in the booster cylinder suddenly drops, it indicates that the evacuation slide material has failed. The thermal testing device provided by the present application can accurately obtain the failure time of the evacuation slide material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 for Figure 1 Schematic diagram of the structure from different perspectives;

[0021] Figure 4 for Figure 1 Schematic diagram of the local structure.

[0022] Among them: 1. test bench; 2. gas circuit system; 21. pressure gauge; 22. pressure sensor; 23. exhaust valve; 24. gas source interface; 3. booster cylinder; 4. heat flow tester; 5. electric heating radiation furnace; 6. insulation board; 61. rotating shaft; 7. slide rail; 8. bracket; 81. oblong hole; 9. positioning block. Implementation

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] It should be noted that in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention rather than requiring that the present invention must be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. The terms "front", "rear", "left", "right", "up", and "down" used in the description of the present invention refer to the directions in the accompanying drawings, and the terms "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0025] like Figures 1 to 4 As shown, a thermal testing device includes a test bench 1, on which a booster gas cylinder 3, a heat flow tester 4 and an electric heating radiation furnace 5 are arranged in sequence; the booster gas cylinder 3 is a cylindrical structure with an open end, the open end of the booster gas cylinder 3 faces the electric heating radiation furnace 5, and the open end of the booster gas cylinder 3 is provided with a flange for connecting the test material; the sealed end of the booster gas cylinder 3 is connected to the air path system 2 through an air pipe, and the air path system 2 includes a pressure gauge 21 for displaying the air pressure of the booster gas cylinder 3 and a pressure sensor 22 for monitoring the air pressure of the booster gas cylinder 3.

[0026] During testing, the present application connects the evacuation slide material to the flange at the open end of the booster cylinder to seal the booster cylinder, injects gas into the booster cylinder through the air path system, and performs a thermal test by heating it in an electric heating radiation furnace to achieve a thermal test of the evacuation slide material under a preset pressure. When the pressure sensor detects that the pressure in the booster cylinder suddenly drops, it indicates that the evacuation slide material has failed. The thermal testing device provided by the present application can accurately obtain the failure time of the evacuation slide material.

[0027] like Figure 1 As shown, the test bench 1 is used to connect other components in the test device, and a box can be provided at the bottom of the test bench 1 for placing test materials, etc. The booster cylinder 3, the heat flow tester 4, and the electric heating radiation furnace 5 are installed on the test bench from right to left in sequence, and it is necessary to ensure that their axes are aligned after installation.

[0028] The gas circuit system 2 includes a pipeline, a pressure gauge 21 of (0~35) Kpa and a pressure sensor 22 are connected to the pipeline, an exhaust valve 23 and a gas source interface 24 are also connected to the pipeline, the gas source interface 24 is used to connect to an external gas source, a needle valve is arranged on the pipeline, and the needle valve is connected to the sealing end of the booster cylinder through the air pipe to realize the injection of gas into the booster cylinder 3. The pressure gauge 21 can display the air pressure of the pipeline and the booster cylinder 3, and the pressure sensor 22 can monitor and display the air pressure of the pipeline and the booster cylinder 3. This design can facilitate the injection of gas with preset pressure conditions into the booster cylinder 3, and can realize the monitoring of the gas in the booster cylinder 3.

[0029] During the test, when the pressure sensor 22 detects that the gas in the booster cylinder 3 suddenly decreases, it means that the booster cylinder is no longer sealed, indicating that the evacuation slide material connected to the open end of the booster cylinder 3 has failed. At this time, the time when the evacuation slide material fails can be accurately obtained.

[0030] Furthermore, the test bench is also provided with a timer and a controller. The controller can adopt a single chip microcomputer or other simple chips in the prior art. It only needs to connect the timer and the pressure sensor. When the evacuation slide material starts to be tested, the timer starts to count. When the pressure sensor 22 detects that the pressure in the booster cylinder 3 suddenly decreases, the timer stops counting, and the time 3002 when the material thermal test fails can be accurately obtained.

[0031] In some embodiments, the booster cylinder 3 is an aluminum alloy cylinder with a length of 314 mm, an outer diameter of 178 mm, and an inner diameter of 165 mm. A flat plate head with a thickness of 13 mm is welded to one end of the cylinder, and a connector for connecting the booster gas source pipeline is installed on the flat plate head. An aluminum alloy flange with an outer diameter of 178 mm, an inner diameter of 140 mm, and a thickness of 13 mm is welded to the other end, and 8 evenly distributed circular holes are drilled on the flange. In addition, there is a flange with an outer diameter of 171 mm, an inner diameter of 140 mm, and a thickness of 13 mm for fixing the test piece to the booster cylinder. In order to ensure the seal between the test piece and the booster cylinder, a chloroprene rubber sealing ring is added between the two sides of the test piece and the booster cylinder flange and the fixing flange.

[0032] Furthermore, the bracket 8 connected to the booster cylinder 3 is provided with an oblong hole 81 along the plumb direction, and the booster cylinder 3 is connected to the oblong hole 81 by bolts. This design can realize the adjustment of the position of the booster cylinder 3 in the plumb direction, that is, the booster cylinder 3 can be adjusted in height.

[0033] Furthermore, two parallel slide rails 7 are provided on the test bench 1, and the booster cylinder 3 is mounted on the slide rails 7 through two welded brackets 8, so that the booster cylinder 3 can slide on the slide rails 7, and the slide rails are arranged in the left and right directions. A positioning block 9 is also provided at the right end of the slide rail to limit the slide of the booster cylinder 3 to the right end.

[0034] Heat flow tester: use (0~5) Btu / ft 2 .s (bouts / (square foot·second)) heat flow tester monitors the heat flow of the electric heating radiation furnace. The heat flow tester should be installed on an insulating block 6 with a diameter of 114mm and a thickness of 19mm, such as a thick calcium silicate plate, with the surface of the heat flow tester flush with the surface of the insulating block. The heat flow tester should be installed on a slide bar of the test bench and centered on the surface of the electric heating radiation furnace.

[0035] The heat flow tester is fixed to the rotating shaft 61 through the insulating block 6, and the rotating shaft 61 is connected to one of the slide rails 7 through the bracket 8, so that the heat flow tester can rotate around the rotating shaft 61 and can move with the slide rail 7. A positioning block 9 is set at the left end of the slide rail 7 to limit the movement of the heat flow tester to the left end to prevent it from contacting the electric heating radiation furnace.

[0036] The end face of the selected cylindrical electric heating radiation furnace should be able to provide a uniform heating surface with a diameter of 76mm, and a voltage regulator with an input rated voltage of 115v and a power of not less than 600W should be used to control the thermal radiation intensity of the electric heating radiation furnace. The electric heating radiation furnace must be able to provide a continuous and constant thermal radiation intensity of not less than 20min.

[0037] The test steps for this application are as follows:

[0038] Conduct the test in an unventilated room or enclosed space. It is recommended that the test be conducted under an exhaust hood or other means to remove potentially harmful gases from the test area.

[0039] Turn on the electric heating radiation furnace and other necessary testing instruments, and use (0.5~0.75) hours to stabilize the heat output and preheat the testing instruments.

[0040] Push the booster cylinder 3 away from the electric heating radiation furnace 5. Install the sample on the open end of the booster cylinder 3, with the reflective surface of the material facing the electric heating radiation furnace 5, and place a neoprene sealing ring on each side of the sample. Install washers on the bolts and tighten the nuts to make the booster cylinder 3 airtight.

[0041] Pressurize the booster cylinder 3 to the nominal working pressure of the slide material and check for leakage.

[0042] Position the booster cylinder so that the distance from the sample to the surface of the electric heating radiation furnace is 1.5 Btu / ft 2 .s.

[0043] According to the above distance, place the heat flux tester 4 in front of the electric heating radiation furnace and record the heat flux density. Verify that the heat flux is 1.5 Btu / ft 2 .s, turn and remove the heat flow tester.

[0044] Push the pressurized gas cylinder containing the sample to the front of the electric heating radiation furnace and start the timer.

[0045] From the moment the specimen is placed in front of the furnace, the pressurized gas cylinder is monitored until the first loss of pressure is observed.

[0046] Record the failure time in seconds.

[0047] The above steps can accurately test the failure time of the slide material.

[0048] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A thermal testing device, characterized in that: The test bench (1) comprises a test bench (1), on which a pressurized gas cylinder (3), a heat flow tester (4) and an electric heating radiation furnace (5) are sequentially arranged; The booster gas cylinder (3) is a cylindrical structure with one end open, the open end of the booster gas cylinder (3) faces the electric heating radiation furnace (5), and the open end of the booster gas cylinder (3) is provided with a flange for connecting a test material; The sealed end of the booster cylinder (3) is connected to the air circuit system (2) via an air pipe, and the air circuit system (2) comprises a pressure gauge (21) for displaying the air pressure of the booster cylinder (3) and a pressure sensor (22) for monitoring the air pressure of the booster cylinder (3).

2. The thermal testing device according to claim 1, characterized in that: The test bench (1) is also provided with a timer and a controller, and the timer and the pressure sensor (22) are both connected to the controller signal.

3. The thermal testing device according to claim 1, characterized in that: The test bench (1) is also provided with two parallel slide rails (7), and the booster cylinder (3) and the heat flow tester (4) are both connected to the slide rails (7) via a bracket (8).

4. The thermal testing device according to claim 3, characterized in that: A rotating shaft (61) is also provided on the bracket (8) connected to the heat flow tester (4), and the heat flow tester (4) is connected to the rotating shaft (61) via an insulating plate (6) so that the heat flow tester (4) can rotate.

5. The thermal testing device according to claim 3, characterized in that: A bracket (8) connected to the booster cylinder (3) is provided with an oblong hole (81) along the plumb bob direction, and the booster cylinder (3) is connected to the oblong hole (81) via bolts.

6. The thermal testing device according to claim 3, characterized in that: Two groups of positioning blocks (9) are provided on the slide rail (7), one group of positioning blocks (9) is located between the heat flow tester (4) and the electric heating radiation furnace (5), and the other group of positioning blocks (9) is located on a side of the booster cylinder (3) away from the heat flow tester (4).

7. The thermal testing device according to any one of claims 1 to 6, characterized in that: The axis of the booster cylinder (3) and the centers of the heat flow tester (4) and the electric heating radiation furnace (5) are on the same straight line.

8. The thermal testing device according to claim 1, characterized in that: The test material is connected to the flange through a connecting piece, and a sealing ring is provided between the connecting piece and the flange.

9. The thermal testing device according to claim 1, characterized in that: The electric heating radiation furnace (5) is also connected to a voltage regulator.

10. The thermal testing device according to claim 1, characterized in that: The gas circuit system is also provided with an exhaust valve (23) and a gas source interface (24).

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