Radiation heat conduction test system

Abstract

The utility model discloses a radiation heat conduction test system, comprising a base plate installed on a support frame; the sample clamping mechanism is used for clamping and fixing the test sample in the test process; the sample platform rotating and positioning mechanism is used for automatically replacing and positioning a sample in the testing process and is mounted at the bottom of the rotating bottom plate; the calorimeter pressure measuring movement mechanism is used for placing the calorimeter and enabling the calorimeter to be located at a testing position or a cooling position, and the calorimeter pressure measuring movement mechanism penetrates through the bottom plate and is installed at the bottom of the rotating bottom plate; the calorimeter cooling mechanism is used for cooling the calorimeter and is mounted at the lower end of the bottom plate; the heat source control mechanism is used for turning on and turning off a heat source; the protective fence movable screen moving mechanism is used for blocking heat and opening and closing the movable screen; and the electrical control system is used for controlling the function operation of each mechanism. The problems existing in manual replacement operation of a test sample of an existing instrument are solved, and the instrument use efficiency, the operator safety and the accuracy and the stability of an experimental result are involved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat conduction testing, in particular to a radiation heat conduction testing system. Background Art

[0002] Thermal insulation clothing, also known as thermal protective clothing, is an important piece of personal protective equipment. This type of protective clothing is primarily used to prevent ignition, flaming, and smoldering when exposed to flames and hot objects, thereby protecting the wearer from various injuries. Thermal insulation clothing is primarily made of polyester, polyimide, polypropylene, and membrane composite materials. These materials offer fire, radiation, and chemical resistance, effectively protecting workers.

[0003] The national standard GB38453-2019 "Protective Clothing Thermal Insulation Clothing" has made mandatory provisions on the technical requirements for thermal insulation clothing. Research institutions and manufacturers in the textile industry are all developing and improving the technical performance of thermal insulation clothing. Testing instruments that meet the standard requirements have become indispensable equipment.

[0004] The test process of the existing instrument: 1. The radiation source is calibrated to a heat flux of (20±0.4)kW / m 2 2. Secure the specimen to the specimen holder, ensuring contact with the calorimeter surface and applying a force of 2 N. 3. Pull open the movable screen and record the start time of irradiation. After the temperature rises and reaches approximately 30°C, return the movable screen to its closed position and determine the time to reach a temperature rise of (24 ± 0.2)°C (RHTI24) with an accuracy of 0.1 s. The second step in the test process involves installing and replacing the specimen. In a relatively confined space, the operator must secure the specimen to the specimen holder, ensuring smooth contact with the calorimeter surface. This process may require repeated adjustments to achieve the desired result. A 2 N weight or heavy object must also be secured to one side of the specimen. There must be no resistance or obstacles in the direction of force application to ensure a 2 N force is applied to the specimen.

[0005] During the entire test operation, operators spend a lot of time on the installation and replacement of samples. Whether the sample installation is accurate directly affects the accuracy of the test data results and is the key to evaluating the performance of the sample. In actual use, it is found that the operation of replacing the sample in the second step of the test process is extremely inconvenient. Since the sample size is small, 230mm×80mm, and the space for installing the sample is also small, it is not convenient for manual operation. At the same time, the radiant heat from the radiation source will continuously heat the part where the sample is installed, causing high temperature in this part, which can easily cause accidental burns to the operator. Each group of tests requires at least three samples to be replaced three times, so for manual operation, there are indeed certain difficulties and safety risks, which will greatly reduce the efficiency of the instrument and cannot guarantee the accuracy and stability of the data. Therefore, a new thermal conductivity testing system has become a problem that technicians in this field urgently need to solve. Utility Model Content

[0006] The present application provides a radiant heat conduction testing system, comprising: a support frame, wherein a bottom plate is provided on the support frame;

[0007] A specimen clamping mechanism is used to clamp and fix the test specimen during the test process. The specimen clamping mechanism is provided with a rotating base plate, which is mounted on one end of the base plate. A first fixed clamping mouth and a second fixed clamping mouth are mounted on one end of the rotating base plate, and a first pneumatic clamping mouth and a second pneumatic clamping mouth are mounted on the other end of the rotating base plate. The first pneumatic clamping mouth cooperates with the first fixed clamping mouth to perform a clamping operation, and the second pneumatic clamping mouth cooperates with the second fixed clamping mouth to perform a clamping operation.

[0008] The sample platform rotation and positioning mechanism is used for automatically changing and positioning the sample during the test and is installed at the bottom of the rotating base plate;

[0009] a calorimeter pressure measuring motion mechanism, used for placing the calorimeter and placing the calorimeter in a testing position or a cooling position, wherein the calorimeter pressure measuring motion mechanism passes through the base plate and is mounted on the bottom of the rotating base plate;

[0010] The calorimeter cooling mechanism is used for cooling the calorimeter and is installed at the lower end of the base plate;

[0011] A heat source control mechanism, used for turning the heat source on and off, the heat source control mechanism being mounted on an end of the base plate away from the sample clamping mechanism;

[0012] The protective grid movable screen movement mechanism is used to block heat and open and close the movable screen, and is installed on the bottom plate and is located in the middle of the sample clamping mechanism and the heat source control mechanism;

[0013] The electrical control system is used to control the functional operation of each mechanism and send start signals and stop signals to each system to control the operation and stop of each system. The electrical control system is connected to the sample clamping mechanism, sample platform rotation and positioning mechanism, calorimeter pressure measurement movement mechanism, calorimeter cooling mechanism, heat source control mechanism and protective grid movable screen movement mechanism signal.

[0014] Optionally, the sample platform rotation and positioning mechanism includes a first servo motor, and the first servo motor is fixedly connected to the rotating base plate via a rotating shaft passing through the base plate.

[0015] Optionally, the calorimeter pressure measurement movement mechanism includes a first linear cylinder that drives vertical movement, the first linear cylinder is fixed to the top of the slider, and the slider is horizontally slidably connected to a second servo motor that drives horizontal movement;

[0016] The first linear cylinder passes through the bottom plate and the rotating bottom plate and is connected to the pressure measuring bottom plate. The calorimeter is fixedly arranged on the pressure measuring bottom plate, and a pressure measuring gauge is also arranged at one end of the calorimeter.

[0017] Optionally, a sliding groove is respectively provided on the bottom plate and the rotating bottom plate, the first linear cylinder passes through the sliding groove, and the opening cross-sectional area of ​​the sliding groove is adapted to the motion trajectory of the pressure measuring bottom plate.

[0018] Optionally, the calorimeter cooling mechanism further comprises a gas nozzle, wherein the gas nozzle is mounted on a solenoid valve, and the solenoid valve is mounted on the bottom of the base plate.

[0019] Optionally, the heat source control mechanism includes a heat source and a heat source switch, wherein the heat source switch is fixed to an upper end of the bottom plate and away from an end of the sample clamping mechanism, and the heat source switch is used to turn the heat source on and off.

[0020] Optionally, the protective grid movable screen movement mechanism includes a movable screen and a protective grid, the protective grid is in sliding contact with the movable screen, and the protective grid is arranged at one end of the movable screen close to the sample clamping mechanism;

[0021] The bottom of the movable screen is connected to the second linear cylinder through a connecting shaft passing through the bottom plate.

[0022] Optionally, the electrical control system includes a test button, a heat source button, a second pneumatic clamp button and a first pneumatic clamp button;

[0023] The test button is used to control the operation of the calorimeter pressure measurement movement mechanism;

[0024] The heat source button is used to control the opening and closing of the heat source switch;

[0025] The second pneumatic jaw button is used to control the movement of the second pneumatic jaw;

[0026] The first pneumatic jaw button is used to control the movement of the first pneumatic jaw.

[0027] The beneficial effects of the present application are: providing an adaptive intelligent calibration radiation heat conduction test system with an automatic sample changing function, realizing automatic sample replacement, thereby realizing automation of the test process, and completing the entire test process through the sample clamping mechanism, the sample platform rotation and positioning mechanism, the calorimeter pressure measurement movement mechanism, the protective grid movable screen movement mechanism, the calorimeter cooling mechanism, and the heat source control mechanism. Automatic sample changing process: the calorimeter pressure measurement movement system moves downward to the cooling position, the calorimeter cooling mechanism cools the calorimeter, the samples required for three tests are fixed on the sample clamping mechanism, the sample platform automatically rotates and positions according to the sample currently to be tested, the calorimeter pressure measurement movement mechanism moves upward to the test position, and automatically moves slowly in the direction of the test sample, the calorimeter pressure measurement movement mechanism measures the pressure value of the sample on the calorimeter, stops moving after meeting the requirements, and the automatic sample changing is completed. Repeating the above process can complete the automatic replacement of three samples. Improve the efficiency of instrument use, ensure the safety of operators, and ensure the accuracy and stability of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the heat conduction test system structure;

[0029] Figure 2 This is a schematic diagram of the top view of the sample platform rotation and positioning mechanism;

[0030] In the figure: 1. heat source switch; 2. movable screen; 3. protective grid; 4. first fixed clamp; 5. second fixed clamp; 6. calorimeter; 7. pressure measuring gauge; 8. pressure measuring base plate; 9. first pneumatic clamp; 10. second pneumatic clamp; 11. rotating base plate; 12. first servo motor; 13. second servo motor; 14. first linear cylinder; 15. solenoid valve; 16. gas nozzle; 17. second linear cylinder; 18. test button; 19. heat source button; 20. second pneumatic clamp button; 21. first pneumatic clamp button; 22. base plate. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The present application provides a radiation heat conduction testing system, comprising: a support frame, on which a bottom plate 22 is provided;

[0033] A specimen clamping mechanism is used to clamp and fix the test specimen during the test process. The specimen clamping mechanism is provided with a rotating base plate 11, which is mounted on one end of the base plate 22. A first fixed clamping opening 4 and a second fixed clamping opening 5 are mounted on one end of the rotating base plate 11, and a first pneumatic clamping opening 9 and a second pneumatic clamping opening 10 are mounted on the other end. The first pneumatic clamping opening 9 cooperates with the first fixed clamping opening 4 to perform a clamping operation, and the second pneumatic clamping opening 10 cooperates with the second fixed clamping opening 5 to perform a clamping operation.

[0034] like Figure 1 Figure 2 As shown, the sample platform rotation and positioning mechanism is used for automatic replacement and positioning of the sample during the test and is installed at the bottom of the rotating base plate 11;

[0035] The sample platform rotation and positioning mechanism further includes a first servo motor 12 . The first servo motor 12 is fixedly connected to the rotating base plate 11 via a rotating shaft penetrating the base plate 22 .

[0036] The forward or reverse rotation of the first servo motor 12 drives the rotating base plate 11 to perform forward or reverse rotation.

[0037] a calorimeter pressure measuring motion mechanism, used to place the calorimeter 6 and place the calorimeter 6 in a testing position or a cooling position, wherein the calorimeter pressure measuring motion mechanism passes through the base plate 22 and is mounted on the bottom of the rotating base plate 11;

[0038] The calorimeter pressure measurement movement mechanism also includes a first linear cylinder 14 that drives vertical movement. The first linear cylinder 14 is fixed to the top of the slider. The slider is horizontally slidably connected to the second servo motor 13 that drives horizontal movement.

[0039] The first linear cylinder 14 passes through the base plate 22 and the rotating base plate 11 and is connected to the pressure measuring base plate 8 . The calorimeter 6 is fixedly arranged on the pressure measuring base plate 8 , and a pressure measuring gauge 7 is also arranged at one end of the calorimeter 6 .

[0040] Sliding grooves are respectively formed on the base plate 22 and the rotating base plate 11 . The first linear cylinder 14 passes through the sliding grooves. The opening cross-sectional area of ​​the sliding grooves is adapted to the motion trajectory of the pressure measuring base plate 8 .

[0041] The calorimeter pressure measurement motion system is used to position the calorimeter 6 and place it in the test or cooling position. The forward or reverse rotation of the second servo motor 13 drives the pressure measurement base plate 8 to move left and right. When the calorimeter 6 is in the test position, the pressure exerted by the sample on the surface of the calorimeter 6 is measured. The first linear cylinder 14 drives the pressure measurement base plate 8 up and down to a specified position, and the second servo motor 13 drives the pressure measurement base plate 8 to move left and right. The calorimeter 6 is placed on the pressure measurement base plate 8, and the pressure gauge 7 is fixed to the pressure measurement base plate 8, with the tail end of the calorimeter 6 adjacent to the pressure gauge 7. The pressure measurement base plate 8 is fixed to the first linear cylinder 14, which is in turn fixed to the second servo motor 13.

[0042] The calorimeter cooling mechanism is used to cool the calorimeter 6 and is installed at the lower end of the base plate 22;

[0043] The calorimeter cooling mechanism further includes a gas nozzle 16 , which is mounted on a solenoid valve 15 , and the solenoid valve 15 is mounted on the bottom of the base plate 22 .

[0044] A heat source control mechanism, used for turning the heat source on and off, the heat source control mechanism being mounted on an end of the base plate 22 away from the sample clamping mechanism;

[0045] The heat source control mechanism further includes a heat source and a heat source switch 1 . The heat source switch 1 is fixed to the upper end of the bottom plate 22 and away from one end of the sample clamping mechanism. The heat source switch 1 is used to turn the heat source on and off.

[0046] The protective grid movable screen movement mechanism is used to block heat and open and close the movable screen 2, and is installed on the bottom plate 22 and is located in the middle of the sample clamping mechanism and the heat source control mechanism;

[0047] The protective grid movable screen movement mechanism includes a movable screen 2 and a protective grid 3, wherein the protective grid 3 is in sliding contact with the movable screen 2, and the protective grid 3 is arranged at one end of the movable screen 2 close to the sample clamping mechanism;

[0048] The bottom of the movable screen 2 is connected to the second linear cylinder 17 through a connecting shaft passing through the bottom plate 22.

[0049] The electrical control system is used to control the functional operation of each mechanism and send start signals and stop signals to each system to control the operation and stop of each system. The electrical control system is connected to the sample clamping mechanism, sample platform rotation and positioning mechanism, calorimeter pressure measurement movement mechanism, calorimeter cooling mechanism, heat source control mechanism and protective grid movable screen movement mechanism signal.

[0050] The electrical control system includes a test button 18, a heat source button 19, a second pneumatic clamp button 20 and a first pneumatic clamp button 21;

[0051] The test button 18 is used to control the operation of the calorimeter pressure measurement movement mechanism;

[0052] The heat source button 19 is used to control the opening and closing of the heat source switch 1;

[0053] The second pneumatic jaw button 20 is used to control the movement of the second pneumatic jaw 10;

[0054] The first pneumatic jaw button 21 is used to control the movement of the first pneumatic jaw 9 .

[0055] It should be noted that, the first pneumatic clamp 9 and the second pneumatic clamp 10 of the electrical control system are opened by operating the operation, and one end of the cut first test specimen is placed inside the first pneumatic clamp 9. The first pneumatic clamp button 21 of the electrical control system is operated to close the first pneumatic clamp 9, and one end of the specimen is clamped and fixed, and the other end of the test specimen is fixed to the first fixed clamp 4. One end of the cut second test specimen is fixed on the first fixed clamp 4, and the other end of the test specimen is fixed to the second fixed clamp 5. One end of the cut third test specimen is fixed to the second fixed clamp 5. The second pneumatic clamp button 20 of the electrical control system is operated to open the second pneumatic clamp 10, and the other end of the test specimen is placed into the second pneumatic clamp 10. The electrical control system is operated. The second pneumatic clamp button 20 closes the second pneumatic clamp 10, clamps the other end of the sample, and the sample is clamped; the heat source button 19 of the electrical control system is operated, and the heat source switch 1 turns on the heat source; the test button 18 of the electrical control system is operated, and the second servo motor 13 starts and drives the pressure measuring base plate 8 to move toward the test sample. The calorimeter 6 placed on the pressure measuring base plate 8 gradually approaches the test sample between the first fixed clamp 4 and the second fixed clamp 5 and applies pressure to the calorimeter 6. After the pressure measuring meter 7 detects that the set pressure has been reached, the second servo motor 13 stops working; the second linear cylinder 17 controls the movable screen 2 to open, and the test begins. After the temperature of the calorimeter 6 rises by 30°C, the second linear cylinder 17 controls the movable screen 2 to close, and the test ends;

[0056] The second servo motor 13 starts to drive the pressure measuring base plate 8 to move away from the test sample to the initial position, and the first linear cylinder 14 drives the pressure measuring base plate 8 to move downward to the cooling position. The solenoid valve 15 opens, and the gas nozzle 16 blows air to the calorimeter 6 for cooling.

[0057] The first servo motor 12 starts and drives the rotating base plate 11 to rotate to the next test position and then stops. After the calorimeter 6 has cooled down, the solenoid valve 15 is closed, and the first linear cylinder 14 drives the pressure measuring base plate 8 to move upward to the test position. The second servo motor 13 starts and drives the pressure measuring base plate 8 to move toward the test sample. The calorimeter 6 placed on the pressure measuring base plate 8 gradually approaches the test sample between the first fixed clamp 4 and the first pneumatic clamp 9 and applies pressure to the calorimeter 6. After the pressure measuring meter 7 detects that the set pressure has been reached, the second servo motor 13 stops working, completing one test sample automatic replacement. Repeating the above process can complete three test sample automatic replacements.

[0058] It should also be noted that the sample clamping system is composed of a first fixed clamping jaw 4, a second fixed clamping jaw 5, a first pneumatic clamping jaw 9, a second pneumatic clamping jaw 10 and a rotating base plate 11, and the control signal is a switch signal;

[0059] The sample platform rotation and positioning system includes a rotation base plate 11 and a first servo motor 12 , and the control signal is a high-speed pulse signal.

[0060] The calorimeter pressure measurement motion system includes a calorimeter 6, a pressure measuring meter 7, a pressure measuring base plate 8, a first linear cylinder 14 and a second servo motor 13, and the control signal is a high-speed pulse signal and an analog signal.

[0061] The above descriptions are merely a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application discloses the preferred embodiments as above, they are not intended to limit the present application. Any technical personnel familiar with the present profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A radiation heat conduction testing system, characterized in that: include: A support frame, wherein a bottom plate (22) is provided on the support frame; A sample clamping mechanism is used for clamping and fixing a test sample during a test process. The sample clamping mechanism is provided with a rotating base plate (11). The rotating base plate (11) is mounted on one end of the base plate (22). A first fixed clamping opening (4) and a second fixed clamping opening (5) are mounted on one end of the rotating base plate (11), and a first pneumatic clamping opening (9) and a second pneumatic clamping opening (10) are mounted on the other end. The first pneumatic clamping opening (9) cooperates with the first fixed clamping opening (4) to perform a clamping operation, and the second pneumatic clamping opening (10) cooperates with the second fixed clamping opening (5) to perform a clamping operation. A sample platform rotation and positioning mechanism, used for automatically replacing and positioning the sample during the test, is installed at the bottom of the rotating base plate (11); a calorimeter pressure measuring motion mechanism, used for placing the calorimeter (6) and placing the calorimeter (6) in a testing position or a cooling position, wherein the calorimeter pressure measuring motion mechanism passes through the base plate (22) and is mounted on the bottom of the rotating base plate (11); A calorimeter cooling mechanism, used for cooling the calorimeter (6), is mounted on the lower end of the base plate (22); A heat source control mechanism, used for turning the heat source on and off, the heat source control mechanism being mounted on one end of the base plate (22) away from the sample clamping mechanism; A protective grid movable screen movement mechanism, used for blocking heat and opening and closing the movable screen (2), is mounted on the bottom plate (22) and is located in the middle of the sample clamping mechanism and the heat source control mechanism; The electrical control system is used to control the functional operation of each mechanism and send start signals and stop signals to each system to control the operation and stop of each system. The electrical control system is connected to the sample clamping mechanism, sample platform rotation and positioning mechanism, calorimeter pressure measurement movement mechanism, calorimeter cooling mechanism, heat source control mechanism and protective grid movable screen movement mechanism signal.

2. The radiation heat conduction testing system according to claim 1, characterized in that: The sample platform rotation and positioning mechanism comprises a first servo motor (12), and the first servo motor (12) is fixedly connected to the rotating base plate (11) via a rotating shaft penetrating the base plate (22).

3. The radiation heat conduction testing system according to claim 1, characterized in that: The calorimeter pressure measurement movement mechanism includes a first linear cylinder (14) that drives vertical movement, the first linear cylinder (14) is fixed to the top of a slider, and the slider is horizontally slidably connected to a second servo motor (13) that drives horizontal movement; The first linear cylinder (14) passes through the base plate (22) and the rotating base plate (11) and is connected to the pressure measuring base plate (8). The calorimeter (6) is fixedly arranged on the pressure measuring base plate (8), and a pressure measuring gauge (7) is also arranged at one end of the calorimeter (6).

4. The radiation heat conduction testing system according to claim 3, characterized in that: The base plate (22) and the rotating base plate (11) are respectively provided with sliding grooves, the first linear cylinder (14) passes through the sliding grooves, and the opening cross-sectional area of ​​the sliding grooves is adapted to the motion trajectory of the pressure measuring base plate (8).

5. The radiation heat conduction testing system according to claim 1, characterized in that: The calorimeter cooling mechanism comprises a gas nozzle (16), the gas nozzle (16) is mounted on a solenoid valve (15), and the solenoid valve (15) is mounted on the bottom of the base plate (22).

6. The radiation heat conduction testing system according to claim 1, characterized in that: The heat source control mechanism comprises a heat source and a heat source switch (1). The heat source switch (1) is fixed to the upper end of the bottom plate (22) and away from one end of the sample clamping mechanism. The heat source switch (1) is used to turn the heat source on and off.

7. The radiation heat conduction testing system according to claim 1, characterized in that: The protective grid movable screen movement mechanism comprises a movable screen (2) and a protective grid (3), wherein the protective grid (3) is in sliding contact with the movable screen (2), and the protective grid (3) is arranged at one end of the movable screen (2) close to the sample clamping mechanism; The bottom of the movable screen (2) is connected to the second linear cylinder (17) via a connecting shaft that passes through the bottom plate (22).

8. The radiation heat conduction testing system according to claim 1, characterized in that: The electrical control system comprises a test button (18), a heat source button (19), a second pneumatic clamping button (20) and a first pneumatic clamping button (21); The test button (18) is used to control the operation of the calorimeter pressure measuring movement mechanism; The heat source button (19) is used to control the opening and closing of the heat source switch (1); The second pneumatic jaw button (20) is used to control the movement of the second pneumatic jaw (10); The first pneumatic jaw button (21) is used to control the movement of the first pneumatic jaw (9).

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