A material fire safety protection performance testing device and testing method

Abstract

The application provides a material fire safety protection performance testing device and method, the testing device comprising: an experimental platform; a flame spray gun assembly comprising a flame spray gun moving support and a flame spray gun; the flame spray gun can be adjusted in position in the front-back, left-right and up-down directions; an experimental plate installation assembly for installing an experimental plate; a sensor assembly comprising a sensor moving support and a heat flux density sensor and a plurality of temperature measuring sensors arranged at the front end of the sensor moving support; the sensor moving support can adjust the heat flux density sensor and the temperature measuring sensors in position in the front-back, left-right and up-down directions; a flame temperature sensor assembly comprising a flame temperature sensor support and a flame temperature sensor; a flame impact force testing assembly for measuring the impact strength of the flame sprayed by the flame spray gun. The testing device and method can comprehensively control and characterize the various states of the flame used in the backfire surface temperature test, so that the test results are more accurate and more convincing.

Description

Technical Field

[0001] This invention belongs to the field of material fire safety protection performance testing technology, specifically relating to a material fire safety protection performance testing device and testing method. Background Technology

[0002] There are many methods for testing the thermal protection performance of fire-resistant structures such as fire-retardant coatings, fire-retardant materials, and fire-retardant boards, primarily through hydrocarbon flame back-exposed surface temperature testing. Currently, standards for testing materials resistant to hydrocarbon flames mainly focus on back-exposed surface temperature testing for large samples, such as the large-panel burning method in GB12441-2018, which tests the flame-retardant properties of decorative fire-retardant coatings applied to combustible substrates. However, there are no unified and stringent standards for testing the thermal protection performance of small-scale fire-retardant coatings, boards, and materials in laboratories.

[0003] In hydrocarbon flame back-fire temperature tests to assess the thermal protection performance of fire-retardant coatings, materials, and boards, numerous indicators characterize flame intensity, such as flame temperature, heat flux density, flame impact force, and even the size of the spray gun and the flame coverage. However, in most traditional small-scale hydrocarbon flame back-fire temperature tests, only the flame temperature is characterized. For example, one document describes a test procedure as follows: a combustion experiment is conducted on a steel plate, and every 5 minutes, a box-type gas spray gun is removed, and the temperature of the burning surface and the back of the steel plate is rapidly measured using a high-precision thermometer. Then, a cylindrical gas spray gun is used to rapidly continue heating. This process is repeated until the experiment is completed after 70 minutes of combustion. The test ignition source is solely the cylindrical gas spray gun. Chinese patent document CN 113804724 A discloses a method for testing the thermal insulation performance of thermal protective ceramic coatings. In this method, the simultaneous operation of heat preservation and heating and cooling is used to simulate the real service conditions of thermal protective ceramic coatings and to stabilize the surface temperature. The test temperature is relatively more accurate. However, this test method only characterizes the flame temperature and does not characterize parameters such as flame heat flux density and flame impact force.

[0004] However, simply controlling the temperature is insufficient to rigorously characterize the heat flux density and impact intensity of the flame. Different equipment used in thermal protection performance testing, such as the flame jet angle, nozzle diameter, distance, and gas pressure, can all lead to variations in the flame's heat flux density and impact intensity. For example, propane canisters can be used for ignition, while portable handheld propane canisters can be used; although the temperature difference is not significant, the size and intensity of the resulting flames differ markedly. Furthermore, the heat flux density and impact intensity of the flame have a significant impact on the thermal insulation performance of the char layer. For instance, a high flame impact force can break through the char layer, reducing its thermal insulation performance and causing the measured backplate temperature to rise; conversely, a low impact force will result in a lower measured backplate temperature. Therefore, the heat flux density and impact intensity of the flame have a significant impact on the results of hydrocarbon flame back-fire temperature tests. Current testing devices and methods only characterize the flame temperature and cannot comprehensively control and characterize all aspects of the flame used in the back-fire temperature test, thus offering limited persuasiveness regarding the char layer strength and thermal insulation performance exhibited by the material during the test.

[0005] Furthermore, current laboratory-scale hydrocarbon flame coating back-fire temperature testing equipment typically uses a simple bracket mounted on the test bench to connect the fire-retardant coated test plate to a heat insulation board, which is then fixed to the bracket. One or two temperature sensors are fixed to the bracket at the rear of the test plate. However, this structure is unreliable in its connection between the test plate and the heat insulation board, inconvenient to assemble and disassemble, and cannot accommodate test plates of various sizes. After the experiment, separation of the test plate from the heat insulation board can easily damage the fire-retardant coating. The positions of the temperature measuring device and the flame gun cannot be adjusted, making it impossible to achieve multi-point dynamic temperature measurement. Summary of the Invention

[0006] The technical problem solved by this invention is to provide a material fire safety protection performance testing device and testing method, which can comprehensively control and characterize the various aspects of the flame used in the back-fire surface temperature test, making the test results more accurate and convincing.

[0007] To address the aforementioned problems, a first aspect of the present invention provides a material fire safety protection performance testing device, comprising: Experimental platform; A flame gun assembly is mounted on the experimental platform; the flame gun assembly includes a flame gun moving bracket and a flame gun mounted on the flame gun moving bracket; the flame gun moving bracket allows the flame gun to be adjusted in the front-back, left-right, and up-down directions; An experimental plate mounting assembly is disposed on the experimental platform and located on one side of the nozzle of the flame gun; the experimental plate mounting assembly is used to mount the experimental plate. A sensor assembly is mounted on the experimental platform, located on the side of the experimental plate mounting assembly away from the flame gun assembly; the sensor assembly includes a sensor moving bracket and a heat flux density sensor and multiple temperature sensors located at the front end of the sensor moving bracket; the sensor moving bracket allows the heat flux density sensor and the temperature sensors to be adjusted in the front-back, left-right, and up-down directions; A flame temperature sensor assembly is mounted on the experimental platform, located between the experimental plate mounting assembly and the sensor assembly; the flame temperature sensor assembly includes a flame temperature sensor bracket and a flame temperature sensor mounted on the flame temperature sensor bracket; the flame temperature sensor is movable to the test position; the flame temperature sensor measures the temperature of the flame from the flame gun; The flame impact force testing kit is used to determine the impact strength of the flame ejected by a flamethrower.

[0008] Preferably, the experimental board mounting assembly includes: First base plate; A first horizontal moving mechanism is disposed on the first base plate; An outer support for the experimental board is provided on the moving end of the first horizontal moving mechanism; the outer support for the experimental board can move on the first horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental board; a first crossbeam is provided on the upper part of the outer support for the experimental board. The inner layer support of the experimental board, the top of which is detachably connected to the first crossbeam via a hanging clip; A heat insulation board is disposed in the inner support of the experimental plate; the heat insulation board has a through hole in the middle; the through hole is suitable for mounting the experimental plate. At least two fixed pressure plates are provided, with the two fixed pressure plates located on both sides of the through hole; the fixed pressure plates can cooperate with the heat insulation plate to clamp and fix the experimental plate onto the through hole.

[0009] Preferably, the flame gun moving bracket includes: Second base plate; The second horizontal moving mechanism is disposed on the second base plate; A first movable plate is disposed on the movable end of the second horizontal moving mechanism; the first movable plate can move on the second horizontal moving mechanism along the direction of the line connecting the flame spray gun assembly and the experimental plate mounting assembly; A fixed frame is mounted on the first movable plate; A movable frame, which is disposed on the fixed frame; A first vertical moving mechanism is disposed on the side of the moving frame; the moving end of the first vertical moving mechanism is connected to the fixed frame; the moving frame can move vertically on the first vertical moving mechanism. A third horizontal moving mechanism is located on the top edge of the moving frame; the moving end of the third horizontal moving mechanism is connected to the flame gun; the flame gun can move on the third horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental plate.

[0010] Preferably, the sensor moving bracket includes: Third base plate; The fourth horizontal moving mechanism is disposed on the third base plate; The second movable plate is connected to the movable end of the fourth horizontal moving mechanism. The second movable plate can move along the line connecting the sensor assembly and the experimental plate mounting assembly on the fourth horizontal moving mechanism. A column, which is mounted on the second movable plate; The second vertical moving mechanism is mounted on the column; The second crossbeam is connected to the moving end of the second vertical moving mechanism, and the second crossbeam can move vertically on the second vertical moving mechanism; The fifth horizontal moving mechanism is mounted on the second crossbeam; A support plate is connected to the moving end of the fifth horizontal moving mechanism, and the support plate can move on the fifth horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental plate. A sensor mounting base is provided, which is connected to the support plate; the heat flux density sensor and the temperature sensor are mounted on the sensor mounting base.

[0011] Preferably, the probe of the temperature sensor is connected to the sensor mounting base by a compression spring, and the compression spring is configured to allow the probe of the temperature sensor to have a 3-8mm range of motion in the horizontal direction; The heat flux density sensor is equipped with a flame focusing device at its front end.

[0012] Preferably, the flame impact force testing component includes: A fixing bracket, which can be installed on the outer support of the experimental plate; A non-contact angle sensor, wherein the non-contact angle sensor is mounted on the fixed bracket; A long rod, the upper end of which is connected to the measuring axis of the non-contact angle sensor; A flame impact force test plate, wherein the flame impact force test plate is connected to the lower end of the long rod; A high-precision force gauge is mounted on the fixed bracket and located on the side of the flame impact force test plate away from the flame gun.

[0013] Preferably, the material fire safety protection performance testing device further includes: The system includes a controller, a touch screen, and a camera. The controller is electrically connected to the first horizontal movement mechanism, the second horizontal movement mechanism, the third horizontal movement mechanism, the fourth horizontal movement mechanism, the fifth horizontal movement mechanism, the first vertical movement mechanism, the second vertical movement mechanism, the heat flux density sensor, the temperature sensor, the non-contact angle sensor, the high-precision force gauge, the flame temperature sensor, the flame gun, the touch screen, and the camera. The camera is positioned above the experimental board mounting assembly. A scale is also provided on the outer support of the experimental board.

[0014] A second aspect of the present invention provides a method for testing the fire safety protection performance of a material, which is performed using the aforementioned material fire safety protection performance testing device, and includes the following steps: S1. Adjust the position of the flame gun in the flame gun assembly; adjust the sensor assembly, moving the heat flux density sensor in the sensor assembly to the test position; adjust the flame temperature sensor assembly, moving the flame temperature sensor to the test position; then turn on the flame gun, measure the flame heat flux density of the flame gun through the heat flux density sensor, measure the flame temperature of the flame gun through the flame temperature sensor, and adjust the airflow of the flame gun to make the flame heat flux density and flame temperature reach the set values; S2. Install the flame impact force testing component, then turn on the flame gun and control the airflow to the adjusted value, and use the flame impact force testing component to measure the flame impact force of the flame gun; S3. Remove the flame impact force testing assembly and install the test plate to be tested on the test plate mounting assembly, with the front of the test plate facing the flame gun; adjust the sensor assembly so that the probe end of the temperature sensor contacts the back of the test plate, and place a baffle on the front of the test plate. S4. Turn on the flame gun, and after the flame stabilizes, remove the baffle. While the flame impacts the surface of the experimental plate, measure the temperature of the back side of the experimental plate.

[0015] Preferably, the test method further includes: After the test is completed, the inner support of the experimental board is removed from the outer support of the experimental board. Then, the inner support of the experimental board is placed horizontally on the experimental board disassembly and assembly bracket, with the front of the experimental board facing down, and the experimental board is removed from the heat insulation board.

[0016] Preferably, step S4 further includes: when measuring the back temperature of the experimental plate, the probe end of the temperature sensor is moved along the surface of the experimental plate by means of the sensor moving bracket, and the temperature of multiple areas of the experimental plate is measured. Step S4 further includes: when the surface coating of the experimental plate deforms and bulges due to high temperature, the flame gun is adjusted away from the surface coating by the flame gun moving bracket.

[0017] Compared with the prior art, the present invention has the following advantages: The fire safety protection performance testing device and method of the present invention can not only characterize the temperature of the unexposed surface of the test board when testing the fire safety protection performance of fireproof coatings, fireproof materials and fireproof boards, but also characterize various aspects of the flame such as flame temperature, flame heat flux density and flame impact intensity. It can comprehensively control and characterize all aspects of the flame used in the unexposed surface temperature test, and make the char layer strength and heat insulation performance of the coating more convincing and the experimental results more accurate.

[0018] The fire safety protection performance testing device and method of this invention allows for multi-point dynamic temperature measurement during the experiment. The temperature sensor can be adjusted in the front-back, left-right, and up-down directions via a sensor moving bracket, thus adapting to testing of experimental plates of different specifications. The flame gun can be moved back and forth via a flame gun moving bracket, facilitating adjustment of the distance between the flame gun and the experimental plate during the experiment to accommodate high-temperature deformation of the coating.

[0019] In the material fire safety protection performance testing device of the present invention, the experimental plate and the heat insulation plate are reliably connected, and the experimental plate assembly is easy to install and disassemble, which can avoid damaging the experimental coating after combustion when disassembling the experimental plate.

[0020] The fire safety protection performance testing device for materials of the present invention has reliable contact between the temperature sensor and the experimental plate, and the connection and disconnection operations are simple and easy to perform. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the material fire safety protection performance testing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the flame spray gun assembly in the material fire safety protection performance testing device described in this embodiment of the invention; Figure 3This is a schematic diagram of the structure of the experimental plate mounting assembly in the material fire safety protection performance testing device according to an embodiment of the present invention; Figure 4 This is a front view of the experimental plate mounting assembly in the material fire safety protection performance testing device described in this embodiment of the invention; Figure 5 This is a schematic diagram of the sensor assembly in the material fire safety protection performance testing device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the temperature sensor and the heat flux density sensor in the sensor assembly of the material fire safety protection performance testing device described in this embodiment of the invention; Figure 7 This is a schematic diagram of the flame impact force testing component in the material fire safety protection performance testing device described in this embodiment of the invention; Figure 8 This is a schematic diagram of the structure of the back of the heat insulation plate in the material fire safety protection performance testing device described in the embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the fixed pressure plate in the material fire safety protection performance testing device according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the flame heat flux density measurement test plate installed on the experimental plate mounting assembly in the material fire safety protection performance testing device described in this embodiment of the invention.

[0022] Wherein: 1-Experimental platform; 2-Flame gun assembly; 21-Flame gun moving bracket; 211-Second base plate; 212-Second horizontal moving mechanism; 213-First moving plate; 214-Fixed frame; 215-Moving frame; 216-First vertical moving mechanism; 217-Third horizontal moving mechanism; 22-Flame gun; 3-Experimental plate mounting assembly; 31-First base plate; 32-First horizontal moving mechanism; 33-Outer support of experimental plate; 331-Bottom fixed plate; 332-U-shaped frame; 34-First crossbeam; 35-Inner support of experimental plate; 36-Hanging clip; 37-Heat insulation plate; 38-Through hole; 39-Fixed pressure plate; 310-Mounting step; 4-Experimental plate; 5-Sensor assembly; 51-Sensor moving bracket ; 511-Third base plate; 512-Fourth horizontal moving mechanism; 513-Second moving plate; 514-Column; 515-Second vertical moving mechanism; 516-Second crossbeam; 517-Fifth horizontal moving mechanism; 518-Support plate; 519-Sensor mounting base; 5110-Compression spring; 52-Heat flux density sensor; 53-Temperature sensor; 6-Flame temperature sensor assembly; 61-Flame temperature sensor bracket; 62-Flame temperature sensor; 7-Flame impact force test assembly; 71-Fixed bracket; 72-Non-contact angle sensor; 73-Long rod; 74-Flame impact force test plate; 75-High-precision force gauge; 8-Flame heat flux density measurement test plate; 9-Flame focusing device; 10-Camera; 11-Scale. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 like Figure 1 As shown, this embodiment of a material fire safety protection performance testing device includes: Experimental Platform 1; The flame gun assembly 2 is mounted on the experimental platform 1. The flame gun assembly 2 includes a flame gun moving bracket 21 and a flame gun 22 mounted on the flame gun moving bracket 21. The flame gun moving bracket 21 allows the flame gun 22 to be adjusted in the front-back, left-right, and up-down directions. Experimental plate mounting assembly 3 is mounted on experimental platform 1 and located on one side of the nozzle of flame gun 22; experimental plate mounting assembly 3 is used to mount experimental plate 4. Sensor assembly 5 is mounted on experimental platform 1 and located on the side of experimental plate mounting assembly 3 away from flame gun assembly 2. Sensor assembly 5 includes sensor moving bracket 51 and heat flux density sensor 52 and multiple temperature sensors 53 located at the front end of sensor moving bracket. Sensor moving bracket 51 can adjust the position of heat flux density sensor 52 and temperature sensors 53 in the front-back, left-right and up-down directions. The flame temperature sensor assembly 6 is mounted on the experimental platform 1 and located between the experimental board mounting assembly 3 and the sensor assembly 5. The flame temperature sensor assembly 6 includes a flame temperature sensor bracket 61 and a flame temperature sensor 62 mounted on the flame temperature sensor bracket 61. Flame impact force testing component 7 is used to determine the impact strength of the flame ejected by the flame gun.

[0025] The fire safety protection performance testing device for materials in this embodiment operates as follows: First, the flame gun in the flame gun assembly is adjusted to a suitable position; the sensor assembly is adjusted, moving the heat flux density sensor to the test position with its probe aligned with the location of the experimental plate to be installed; the flame temperature sensor assembly is adjusted, moving the flame temperature sensor to the test position with its probe aligned with the location of the flame emission; then, the airflow of the flame gun is turned on, ignition is performed, the flame heat flux density of the flame gun is measured by the heat flux density sensor, and the flame temperature of the flame gun is measured by the flame temperature sensor. The flame temperature is adjusted by changing the airflow of the flame gun to control the flame temperature. The flow density and flame temperature reach the set values; then, install the flame impact force testing component, turn on the flame gun, and control the airflow to the adjusted value. Use the flame impact force testing component to measure the flame impact force of the flame gun; then remove the flame impact force testing component and install the test plate on the test plate mounting component, with the front of the test plate facing the flame gun, ensuring that the center of the flame gun is aligned with the center of the test plate. Adjust the sensor component so that the probe end of the temperature sensor contacts the back of the test plate, and place a baffle on the front of the test plate; finally, turn on the flame gun, and after the flame stabilizes, remove the baffle. While the flame impacts the surface of the test plate, measure the temperature of the back of the test plate.

[0026] The fire safety performance testing device for materials in this embodiment can characterize not only the temperature of the unexposed surface of the test panel, but also various aspects of the flame, such as flame temperature, flame heat flux density, and flame impact intensity, when testing the fire safety performance of fireproof coatings, fireproof materials, and fireproof boards. It comprehensively controls and characterizes all aspects of the flame used in the unexposed surface temperature test, making the char layer strength and heat insulation performance of the coating more convincing and the experimental results more accurate. During the experiment, the temperature sensor can be adjusted in the forward, backward, left, right, and up / down directions via the sensor moving bracket, enabling multi-point dynamic temperature measurement and adapting to test panels of different specifications. During temperature measurement, the experimental coating deforms at high temperatures, causing the coating surface to bulge. To maintain a constant distance between the flame nozzle and the coating surface, the flame nozzle needs to be moved away from the coating surface. In this embodiment, the flame gun can be moved forward and backward via the flame gun moving bracket, facilitating adjustment of the distance between the flame gun and the test panel during the experiment.

[0027] Among them, the experimental board mounting component 3 is used to mount the experimental board 4.

[0028] Preferably, such as Figure 3 , Figure 4 , Figure 8 As shown, the experimental board mounting assembly 3 includes: First base plate 31; The first horizontal moving mechanism 32 is mounted on the base plate 31. The outer support 33 of the experimental board is located on the moving end of the first horizontal moving mechanism 32. The outer support 33 of the experimental board can move on the first horizontal moving mechanism 32 in a direction that is horizontal and parallel to the surface of the experimental board 4. The upper part of the outer support 33 of the experimental board is provided with a first crossbeam 34. The inner layer support 35 of the experimental board is detachably connected to the first crossbeam 34 via a hanging clip 36. The heat insulation plate 37 is located in the inner support 35 of the experimental plate; the heat insulation plate 37 has a through hole 38 in the middle; the through hole 38 is suitable for installing the experimental plate 4. At least two fixed pressure plates 39 are located on both sides of the through hole 38; the fixed pressure plates 39 can cooperate with the heat insulation plate 37 to clamp and fix the experimental plate 4 on the through hole 38.

[0029] The experimental panel mounting assembly with the above structure allows for easy removal of the inner support layer from the outer support layer after testing. The inner support layer is then placed horizontally on the experimental panel mounting bracket with the coated side facing down. The fixing plate is unlocked from the top, and the experimental panel is removed. This flexible disassembly avoids damage to the burned coating during removal. For installation, the experimental panel is positioned over the through hole and clamped by the fixing plate. The inner support layer is then attached to the outer support layer. This assembly makes installing and removing the experimental panel more convenient, and the connection between the experimental panel and the insulation board is reliable. The outer support layer is connected to the base plate via a first horizontal moving mechanism. The outer support layer, inner support layer, insulation board, and fixing plate are integrated into a single structure and can be pulled out and pushed forward using this mechanism, facilitating the installation and removal of the inner support layer. This first horizontal moving mechanism can be a combination of a slide rail and a slider.

[0030] Preferably, the inner side of the inner support 35 of the experimental plate has a slot, the heat insulation plate 37 is placed in the slot and fixed with screws. The fixation between the heat insulation plate and the inner support of the experimental plate is more reliable and the disassembly is more convenient.

[0031] Specifically, the outer support 33 of the experimental board includes: a bottom fixing plate 331, a U-shaped frame 332 mounted on the bottom fixing plate 331, and an upper and lower crossbeam within the U-shaped frame 332. The bottom fixing plate 331 is connected to the moving end of the first horizontal moving mechanism, and the inner support 35 of the experimental board is hooked to the upper crossbeam via a clip. The bottom of the bottom fixing plate 331 is provided with fixing screws, which lock the outer support of the experimental board in place after it is pushed into position on the slide rail.

[0032] Specifically, the through hole 38 in the middle of the heat insulation plate 37 can be a square hole or a round hole, and the heat insulation plate 37 is provided with an installation step 310 along the outer edge of the through hole.

[0033] Specifically, the outer support 33 of the experimental board is an aluminum profile frame; the inner support 35 of the experimental board is a ceramic plate frame; and the heat insulation board 37 is a ceramic plate.

[0034] Specifically, the size range of the experimental plate is 100mm~250mm, the size of the heat insulation ceramic plate is 400mm*400mm, and the size of the through holes in the heat insulation ceramic plate can be adapted to the size of the experimental plate.

[0035] Preferably, such as Figure 9 As shown, the fixed pressure plate 39 is U-shaped, with one end of the U-shape fixed to the heat insulation plate 37 by screws, and the other end pressed onto the experimental plate 4.

[0036] The flame gun moving bracket is used to adjust the position of the flame gun in the front-back, left-right, and up-down directions.

[0037] Preferably, such as Figure 2 As shown, the flame gun moving support 21 includes: Second base plate 211; The second horizontal moving mechanism 212 is mounted on the second base plate 211; The first movable plate 213 is disposed on the movable end of the second horizontal moving mechanism 212; the first movable plate 213 can move along the line connecting the flame gun assembly and the experimental plate mounting assembly on the second horizontal moving mechanism 212. Fixed frame 214, fixed frame 214 is disposed on the first movable plate 213; The movable frame 215 is mounted on the fixed frame 214. The first vertical moving mechanism 216 is located on the side of the moving frame 215; the moving end of the first vertical moving mechanism 216 is connected to the fixed frame 214; the moving frame 215 can move vertically on the first vertical moving mechanism 216. The third horizontal moving mechanism 217 is located on the top edge of the moving frame; the moving end of the third horizontal moving mechanism 217 is connected to the flame gun 22; the flame gun 22 can move on the third horizontal moving mechanism 217 in a direction that is horizontal and parallel to the surface of the experimental plate 4.

[0038] With the above structure, the flame gun can be moved back and forth via the flame gun moving bracket, making it easy to adjust the distance between the flame gun and the experimental plate during the experiment.

[0039] The sensor moving bracket 51 is used to adjust the position of the heat flux density sensor 52 and the temperature sensor 53 in the front-back, left-right, and up-down directions.

[0040] Preferably, such as Figure 5 As shown, the sensor moving bracket 51 includes: Third base plate 511; The fourth horizontal moving mechanism 512 is mounted on the third base plate 511; The second movable plate 513 is connected to the movable end of the first movable plate and the fourth horizontal moving mechanism 512. The first movable plate can move on the fourth horizontal moving mechanism 512 along the line connecting the sensor assembly and the experimental board mounting assembly. The column 514 is mounted on the second movable plate 513; The second vertical moving mechanism 515 is mounted on the column 514; The second crossbeam 516 is connected to the moving end of the second vertical moving mechanism 515, and the crossbeam 516 can move vertically on the second vertical moving mechanism 515. The fifth horizontal moving mechanism 517 is located on the second crossbeam 516; The support plate 518 is connected to the moving end of the fifth horizontal moving mechanism 517. The support plate can move on the fifth horizontal moving mechanism 517 in a direction that is horizontal and parallel to the surface of the experimental plate. The sensor mounting base 519 is connected to the support plate 518; the heat flux density sensor and the temperature sensor are mounted on the sensor mounting base.

[0041] When measuring heat flux density, the heat flux density sensor can be adjusted to align with the center of the experimental board and the sensor mount can be fixed. The heat flux density sensor should be placed close to the experimental board for measurement. When measuring the temperature on the back of the experimental board, the temperature sensor can be placed close to the experimental board for measurement. At the same time, the sensor bracket can be adjusted to measure the temperature of multiple areas of the experimental board.

[0042] When measuring the temperature of the backside of the experimental board, good contact between the temperature sensor and the back of the board is required. However, the operating mode of this test experiment dictates that the temperature sensor and the experimental board are separate. Therefore, the connection method between the temperature sensor and the experimental board significantly affects the accuracy of the temperature measurement. To improve the accuracy of temperature measurement, preferably, as follows: Figure 6 As shown, the probe of the temperature sensor 53 is connected to the sensor mounting base 519 via a compression spring 5110. The compression spring is configured to allow the probe of the temperature sensor to have a 3-8mm range of motion in the horizontal direction. After the sensor mounting base moves to bring the temperature sensor close to the back of the experimental plate, the sensor mounting base can move further towards the experimental plate to ensure good contact between the surface of the thermocouple and the experimental plate.

[0043] Preferably, the temperature sensor is a type K surface thermocouple, and the probe material is stainless steel with a mesh-like surface that provides a certain degree of elasticity. Three, five, or seven temperature sensors can be used for multi-point detection of the experimental plate.

[0044] Preferably, such as Figure 10 As shown, it also includes a flame heat flux density measurement test plate 8, which is circular and suitable for mounting on a heat insulation plate with circular through holes; the flame heat flux density measurement test plate 8 has a circular hole in the middle. When measuring the flame heat flux density, the flame heat flux density measurement test plate is fixed on the heat insulation plate, and the flame of the flame gun contacts the head of the heat flux density sensor through the circular hole.

[0045] To ensure full contact between the flame and the heat flux density sensor, such as Figure 6As shown, the heat flux density sensor has a flame focusing device 9 at its front end. The flame focusing device 9 includes a cylindrical part and a conical part connected to one end of the cylindrical part. When measuring the heat flux density, the end of the heat flux density sensor is inserted into the cylindrical part, and the conical part is aligned with the circular hole on the back of the flame heat flux density measuring plate.

[0046] Preferably, such as Figure 7 As shown, the flame impact force test assembly 7 includes: Fixed bracket 71, the fixed bracket can be installed on the outer bracket of the experimental plate; A non-contact angle sensor 72 is mounted on a fixed bracket 71. The long rod 73 has its upper end connected to the measuring axis of the non-contact angle sensor 72; Flame impact force test plate 74, the flame impact force test plate is connected to the lower end of the long rod 73; A high-precision force gauge 75 is mounted on a fixed bracket 71 and located on the side of the flame impact force test plate 74 away from the flame gun.

[0047] In this experiment, the flame temperature reaches approximately 1200℃, making it impossible for conventional pressure sensors to operate under such conditions. Therefore, this solution employs an indirect measurement method when measuring the flame impact force. Specifically, during the flame impact force test, a fixed bracket 71 is installed on the outer side of the outer support of the experimental plate (the side closest to the flame torch). A non-contact angle sensor above the fixed bracket converts the angle into an electrical signal using electromagnetic induction. When the flame burns, the impact force causes the flame impact force experimental plate to rotate, causing the angle sensor's shaft to deflect by a certain angle. Based on this angle, combined with the dimensions and weight of the long rod and the flame impact force experimental plate, the flame impact force value can be calculated. A high-precision force gauge is placed on the back of the flame impact force experimental plate, aligned with the flame torch. The high-precision force gauge can also directly measure the flame impact force, allowing for comparison and verification between the data calculated by the angle sensor and the high-precision force gauge.

[0048] Preferably, the non-contact angle sensor uses high-quality stainless steel high-speed bearings and other components to minimize frictional resistance during measurement, thus ensuring measurement accuracy. The flame impact force test plate is made of high-temperature resistant titanium alloy.

[0049] Preferably, the material fire safety protection performance testing device further includes: The controller is electrically connected to the first horizontal moving mechanism, the second horizontal moving mechanism, the third horizontal moving mechanism, the fourth horizontal moving mechanism, the fifth horizontal moving mechanism, the first vertical moving mechanism, the second vertical moving mechanism, a heat flux density sensor, a temperature sensor, a non-contact angle sensor, a high-precision force gauge, a flame temperature sensor, and a flame gun. The controller drives each moving mechanism and sensor.

[0050] The first, second, third, fourth, and fifth horizontal moving mechanisms each include a slide rail, a slider mounted on the slide rail, and a stepper motor that drives the slider to move.

[0051] The flame gun includes the gun body and a gas flow meter, which can be connected to the controller.

[0052] Specifically, the controller consists of a programmable logic controller (PLC) CPU unit, an AD module, and a DA module, which can realize the operation and control of multiple stepper motors, multiple temperature signals, one heat flux density signal, one flame impact force data acquisition, and one flame gun gas flow.

[0053] Preferably, the system also includes a touchscreen, which is electrically connected to the controller. The touchscreen enables manual control, automatic control, parameter setting, alarm display, I / O monitoring, temperature display, and heat flux density display.

[0054] Preferably, the system also includes a camera 10, which is electrically connected to the controller. A scale 11 is also provided on the outer support 33 of the experimental board. During the test, the camera records the expansion and charring of the coating on the experimental board surface and the integrity of the char layer surface in real time. While obtaining the real-time temperature change of the unexposed surface, the camera records the expansion and charring of the coating on the experimental board surface and the integrity of the char layer surface, thereby observing the corresponding changes in the char layer when parameters such as temperature change abruptly. Specifically, the expansion and charring can be monitored by comparing the camera with the scale during the experiment. The char layer height data can be directly read or obtained through image recognition technology, which is existing technology. A simplified description of the process is as follows: 1. Image segmentation: Segmenting the coating image from the entire frame; 2. Coating image feature extraction; 3. Coating height (thickness) identification; 4. Scale data calibration (related to image angle); 5. Verification of image recognition data and scale data. Coating / char layer surface integrity identification can be achieved through image recognition technology, which is existing technology. A simplified description of the process is as follows: Based on coating image feature extraction, using a pre-trained coating surface feature model, the integrity of the coating surface is identified.

[0055] Preferably, it also includes a host computer, which is electrically connected to the controller and can monitor the operating status of the testing device, measurement interface, report operation, system parameters, recipe preview, alarm query, and motor information.

[0056] Example 2 The material fire safety protection performance testing method of this embodiment is completed using the material fire safety protection performance testing device of Embodiment 1, and includes the following steps: 1. Experimental preparation: Turn on the laboratory ventilation, turn on the water cooling system to protect the heat flux density sensor, check and close the valve of the flame gun, open the main gas valve and branch valves, turn on the gas flow meter to the appropriate size, and prepare the corresponding test experimental plate.

[0057] 2. Instrument Calibration: Adjust the flame gun in the flame gun assembly to a suitable position (15-25cm); install the flame heat flux density measurement test plate on the heat insulation plate with a circular through hole; set a flame focusing device at the front end of the heat flux density sensor, with the conical part of the flame focusing device aligned with the circular hole on the back of the flame heat flux density measurement plate; adjust the sensor assembly, moving the heat flux density sensor in the sensor assembly until its end is inserted into the cylindrical part of the flame focusing device; then ignite the flame, and the flame from the flame gun will contact the head of the heat flux density sensor through the circular hole to measure the flame heat flux density; simultaneously, adjust the flame temperature sensor assembly, moving the flame temperature sensor to contact the flame to measure the temperature of the flame from the flame gun; and adjust the airflow of the flame gun to bring the flame heat flux density and flame temperature to the set values. 3. Remove the inner support of the experimental board from the outer support of the experimental board, install the flame impact force testing component on the outer support of the experimental board, then turn on the flame gun and control the airflow to the adjusted value. Use the flame impact force testing component to measure the flame impact force of the flame gun and record the result. 4. Remove the flame impact force testing assembly from the outer support of the test plate and install the inner support of the test plate containing the test plate, with the front of the test plate facing the flame gun; adjust the sensor assembly so that the probe end of the temperature sensor contacts the back of the test plate, and place a baffle on the front of the test plate. 5. Turn on the flame gun. After the flame stabilizes, remove the baffle. Simultaneously, as the flame impacts the surface of the experimental plate, measure and record the temperature of the back side of the plate. Further, the data acquisition software can be pre-set to a data acquisition time of 1 second per acquisition, so that data recording begins the moment the flame impacts the surface of the experimental plate. When measuring the temperature of the back side of the experimental plate, move the probe of the temperature sensor along the surface of the plate using the sensor moving bracket to measure the temperature of multiple areas of the plate. When the surface coating of the experimental plate deforms and bulges due to high temperature, adjust the flame gun away from the surface coating using the flame gun moving bracket.

[0058] 6. Retract the temperature sensor, detach the inner support of the experimental board from the outer support, then place the inner support horizontally on the experimental board assembly / disassembly bracket with the experimental board face down. Remove the experimental board from the heat insulation plate, replace the experimental board for the next test, or stop the experiment. Close the main gas valve, ignite and combust the internal gas, shut off the water cooling system and ventilation, clean the experimental platform, and end the experiment.

[0059] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A material fire safety protection performance testing device, characterized in that, include: Experimental platform; A flame gun assembly is mounted on the experimental platform; The flame gun assembly includes a flame gun moving bracket and a flame gun mounted on the flame gun moving bracket; the flame gun moving bracket allows the flame gun to be adjusted in the front-back, left-right, and up-down directions. An experimental plate mounting assembly is disposed on the experimental platform and located on one side of the nozzle of the flame gun; the experimental plate mounting assembly is used to mount the experimental plate. A sensor assembly is mounted on the experimental platform, located on the side of the experimental plate mounting assembly away from the flame gun assembly; the sensor assembly includes a sensor moving bracket and a heat flux density sensor and multiple temperature sensors located at the front end of the sensor moving bracket; the sensor moving bracket allows the heat flux density sensor and the temperature sensors to be adjusted in the front-back, left-right, and up-down directions; A flame temperature sensor assembly is mounted on the experimental platform, located between the experimental plate mounting assembly and the sensor assembly; the flame temperature sensor assembly includes a flame temperature sensor bracket and a flame temperature sensor mounted on the flame temperature sensor bracket; the flame temperature sensor is movable to the test position; the flame temperature sensor measures the temperature of the flame from the flame gun; Flame impact force testing kit, used to determine the impact strength of the flame ejected by a flamethrower; The experimental board mounting assembly includes: First base plate; A first horizontal moving mechanism is disposed on the first base plate; An outer support for the experimental board is provided on the moving end of the first horizontal moving mechanism; the outer support for the experimental board can move on the first horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental board; a first crossbeam is provided on the upper part of the outer support for the experimental board. The inner layer support of the experimental board, the top of which is detachably connected to the first crossbeam via a hanging clip; A heat insulation board is disposed in the inner support of the experimental plate; the heat insulation board has a through hole in the middle; the through hole is suitable for mounting the experimental plate. At least two fixing plates are provided, with the two fixing plates located on both sides of the through hole; the fixing plates can cooperate with the heat insulation plate to clamp and fix the experimental plate onto the through hole; The flame impact force testing component includes: A fixing bracket, which can be installed on the outer support of the experimental plate; A non-contact angle sensor, wherein the non-contact angle sensor is mounted on the fixed bracket; A long rod, the upper end of which is connected to the measuring axis of the non-contact angle sensor; A flame impact force test plate, wherein the flame impact force test plate is connected to the lower end of the long rod; A high-precision force gauge is mounted on the fixed bracket and located on the side of the flame impact force test plate away from the flame gun.

2. The material fire safety protection performance testing device according to claim 1, characterized in that, The flame gun movable support includes: Second base plate; The second horizontal moving mechanism is disposed on the second base plate; A first movable plate is disposed on the movable end of the second horizontal moving mechanism; the first movable plate can move on the second horizontal moving mechanism along the direction of the line connecting the flame spray gun assembly and the experimental plate mounting assembly; A fixed frame is mounted on the first movable plate; A movable frame, which is disposed on the fixed frame; A first vertical moving mechanism is disposed on the side of the moving frame; the moving end of the first vertical moving mechanism is connected to the fixed frame; the moving frame can move vertically on the first vertical moving mechanism. A third horizontal moving mechanism is located on the top edge of the moving frame; the moving end of the third horizontal moving mechanism is connected to the flame gun; the flame gun can move on the third horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental plate.

3. The material fire safety protection performance testing device according to claim 2, characterized in that, The sensor moving bracket includes: Third base plate; The fourth horizontal moving mechanism is disposed on the third base plate; The second movable plate is connected to the movable end of the fourth horizontal moving mechanism. The second movable plate can move along the line connecting the sensor assembly and the experimental plate mounting assembly on the fourth horizontal moving mechanism. A column, which is mounted on the second movable plate; The second vertical moving mechanism is mounted on the column; The second crossbeam is connected to the moving end of the second vertical moving mechanism, and the second crossbeam can move vertically on the second vertical moving mechanism; The fifth horizontal moving mechanism is mounted on the second crossbeam; A support plate is connected to the moving end of the fifth horizontal moving mechanism, and the support plate can move on the fifth horizontal moving mechanism in a direction that is horizontal and parallel to the surface of the experimental plate. A sensor mounting base is provided, which is connected to the support plate; the heat flux density sensor and the temperature sensor are mounted on the sensor mounting base.

4. The material fire safety protection performance testing device according to claim 3, characterized in that: The probe of the temperature sensor is connected to the sensor mounting base by a compression spring, which is configured to allow the probe of the temperature sensor to have a 3-8mm range of motion in the horizontal direction. The heat flux density sensor is equipped with a flame focusing device at its front end.

5. The material fire safety protection performance testing device according to claim 4, characterized in that, Also includes: The experimental board includes a controller, a touch screen, and a camera. The controller is electrically connected to the first horizontal movement mechanism, the second horizontal movement mechanism, the third horizontal movement mechanism, the fourth horizontal movement mechanism, the fifth horizontal movement mechanism, the first vertical movement mechanism, the second vertical movement mechanism, the heat flux density sensor, the temperature sensor, the non-contact angle sensor, the high-precision force gauge, the flame temperature sensor, the flame torch, the touch screen, and the camera. The camera is positioned above the experimental board mounting assembly. A scale is also provided on the outer support of the experimental board.

6. A method for testing the fire safety protection performance of a material, characterized in that, The test is performed using the material fire safety protection performance testing device as described in any one of claims 1-5, and includes the following steps: S1. Adjust the position of the flame gun in the flame gun assembly; adjust the sensor assembly, moving the heat flux density sensor in the sensor assembly to the test position; adjust the flame temperature sensor assembly, moving the flame temperature sensor to the test position; then turn on the flame gun, measure the flame heat flux density of the flame gun through the heat flux density sensor, measure the flame temperature of the flame gun through the flame temperature sensor, and adjust the airflow of the flame gun to make the flame heat flux density and flame temperature reach the set values; S2. Install the flame impact force testing component, then turn on the flame gun and control the airflow to the adjusted value, and use the flame impact force testing component to measure the flame impact force of the flame gun; S3. Remove the flame impact force testing assembly and install the test plate to be tested on the test plate mounting assembly, with the front of the test plate facing the flame gun; adjust the sensor assembly so that the probe end of the temperature sensor contacts the back of the test plate, and place a baffle on the front of the test plate. S4. Turn on the flame gun, and after the flame stabilizes, remove the baffle. While the flame impacts the surface of the experimental plate, measure the temperature of the back side of the experimental plate.

7. The method for testing the fire safety protection performance of materials according to claim 6, characterized in that, Also includes: After the test is completed, the inner support of the experimental board is removed from the outer support of the experimental board. Then, the inner support of the experimental board is placed horizontally on the experimental board disassembly and assembly bracket, with the front of the experimental board facing down, and the experimental board is removed from the heat insulation board.

8. The method for testing the fire safety protection performance of materials according to claim 7, characterized in that: Step S4 further includes: when measuring the back temperature of the experimental plate, the probe end of the temperature sensor is moved along the surface of the experimental plate by means of the sensor moving bracket, and the temperature of multiple areas of the experimental plate is measured. Step S4 further includes: when the surface coating of the experimental plate deforms and bulges due to high temperature, the flame gun is adjusted away from the surface coating by the flame gun moving bracket.

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