Fire-retardant material performance detection device

Abstract

The utility model relates to a fire-retardant material performance detection device, and belongs to the technical field of detection devices. Through the synergistic effect of the heating pipe and the air flow simulation assembly, the high-temperature environment and the air flow impact strength in the detection cavity can be accurately controlled, directional output of heat flow is achieved through structural cooperation of the flow guide plate and the air inlet, dynamic simulation of high temperature and air flow disturbance in a real fire scene is achieved, and the accuracy of test data is improved; the temperature-adjustable fixed heating pipe is adopted, and a positioning structure of a limiting groove is combined, so that angle and distance positioning errors caused by manual adjustment are solved, and the detection period is greatly shortened; the heat conduction test module adopts thermocouple sensors distributed at multiple points, can comprehensively capture the temperature change of the surface of a sample, and can more accurately evaluate the performance of the fire retardant material in combination with the influence of airflow impact.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, specifically relating to a testing device for the performance of fire-retardant materials. Background Technology

[0002] Fire-retardant materials are widely used in construction, chemical, and power industries to prevent the spread and expansion of fires. Accurate testing of their flame-retardant properties is a key step in evaluating the effectiveness of fire safety protection systems.

[0003] However, traditional testing devices often rely on manual adjustment of the flame jet angle, operating distance, and flame intensity during testing, which prolongs the testing cycle and introduces positioning errors due to manual intervention. Secondly, existing testing devices lack the ability to simulate the high temperature and airflow impact in real fire scenarios, resulting in a large deviation between material testing data and actual working conditions, making it difficult to accurately evaluate the performance of fire-retardant materials. Utility Model Content

[0004] To overcome the shortcomings of traditional testing devices in the background technology, which often rely on frequent manual adjustments of the flame injector angle, effective distance, and flame intensity during testing, thus prolonging the testing cycle and introducing positioning errors due to manual intervention, and because existing testing devices lack the ability to simulate the high temperature and airflow impact in real fire scenarios, resulting in significant deviations between material test data and actual working conditions, making it difficult to accurately evaluate the performance of fire-retardant materials, this utility model provides a fire-retardant material performance testing device. Through the synergistic action of the heating tube and airflow simulation component, the high-temperature environment and airflow impact intensity within the testing chamber can be precisely controlled. The use of a guide plate and air inlet structure to achieve directional heat flow output realizes dynamic simulation of high temperature and airflow disturbance in real fire scenarios, improving the accuracy of test data. The adoption of a temperature-adjustable fixed heating tube, combined with a positioning structure of a limiting groove, solves the angle and distance positioning errors caused by manual adjustment, significantly shortening the testing cycle. The thermal conductivity testing module uses multi-point distributed thermocouple sensors to comprehensively capture temperature changes on the sample surface, and combined with the influence of airflow impact, it can more accurately evaluate the performance of fire-retardant materials.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A fire-retardant material performance testing device mainly includes a testing chamber, a heating tube, an airflow simulation component, a thermal conductivity testing module, a support platform, a chassis, and a heat-conducting plate. The testing chamber is a rectangular box with a door at the front end. A support platform is installed on the bottom surface of the testing chamber, and a rectangular limiting groove is formed on the top surface of the support platform. A stepped groove is formed on the limiting groove, and a heat-conducting plate for placing the fire-retardant material sample to be tested is installed on the stepped groove. A heating tube electrically connected to a controller is installed at the bottom of the rectangular limiting groove, and fins are evenly distributed on the surface of the heating tube. A chassis is installed at the rear end of the testing chamber, and an airflow simulation component is installed inside the chassis. The simulated airflow component includes an airflow channel between the side wall of the chassis and the rear side wall of the detection chamber. Multiple air inlets communicating with the airflow channel are equidistantly located on the side wall of the detection chamber. Multiple downwardly inclined guide plates are equidistantly installed on the inner wall of the detection chamber, positioned between adjacent air inlets. The airflow simulation component includes a blower and a speed controller, with the blower's outlet communicating with the airflow channel. The thermal conductivity testing module includes thermocouple sensors and a data acquisition unit. The thermocouple sensors are evenly distributed within the limiting groove of the support platform, with their tops extending to through holes on the heat-conducting plate to contact the sample under test. The data acquisition unit is mounted on the side wall of the detection chamber and connected to the thermocouple sensors via signal lines.

[0006] A clamping assembly is installed on the support platform. The clamping assembly includes a clamping plate, a guide rod, and a spring. A guide rod is installed in the stepped groove. Two sets of symmetrical clamping plates are slidably installed on the guide rod, and a spring is sleeved at the end of the guide rod to press against the end face of the clamping plate.

[0007] The chassis is equipped with a cooling water tank and a water pump. The water pump inlet is connected to the cooling water tank. A serpentine cooling water circulation pipe is installed in the rectangular limiting groove of the support platform. The cooling water circulation pipe is in contact with the bottom surface of the heat conduction plate and is located above the heating pipe. One end of the pipe passes through the detection cavity and the side wall of the chassis and is connected to the water pump outlet. The other end passes through the detection cavity and the side wall of the chassis and is connected to the cooling water tank.

[0008] The door of the box has a rectangular opening, and a high-temperature resistant glass observation window is installed in the rectangular opening.

[0009] The thermal conductivity testing module also includes an infrared thermal imager, whose lens is aimed at the heat-conducting plate and fixed to the inner wall of the top of the testing cavity via a connecting plate.

[0010] The cooling water tank is equipped with a semiconductor refrigeration chip on the outside, and the outer wall of the cooling water circulation pipe is wrapped with a graphene thermally conductive coating.

[0011] The beneficial effects of this utility model are:

[0012] This invention utilizes the synergistic effect of a heating tube and an airflow simulation component to precisely control the high-temperature environment and airflow impact intensity within the testing chamber. The use of a guide plate and air inlet structure enables directional heat flow output, achieving dynamic simulation of high temperatures and airflow disturbances in real fire scenarios, thus improving the accuracy of test data. The use of a temperature-adjustable fixed heating tube, combined with a positioning structure with a limiting groove, eliminates angle and distance positioning errors caused by manual adjustment, significantly shortening the testing cycle. The thermal conductivity testing module employs multi-point distributed thermocouple sensors, enabling comprehensive capture of temperature changes on the sample surface. Combined with the influence of airflow impact, this allows for more accurate evaluation of the performance of fire-retardant materials. Attached Figure Description

[0013] Figure 1 This is the isometric drawing of this utility model.

[0014] Figure 2 This is a three-dimensional schematic diagram of the internal structure of this utility model.

[0015] Figure 3 This is a 3D schematic diagram of the heat-conducting plate installation status.

[0016] Figure 4 This is a three-dimensional schematic diagram of the installation status of the heating pipe, cooling water circulation pipe box clamping assembly.

[0017] Figure 5 This is a 3D schematic diagram of the internal structure of the chassis. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0019] This utility model discloses a fire-retardant material performance testing device. The device mainly includes a testing chamber 1, a heating tube 2, an airflow simulation component 3, a thermal conductivity testing module 4, a support platform 5, a chassis 6, and a heat-conducting plate 7. The testing chamber 1 is a rectangular box with a door at the front. A support platform 5 is mounted on the bottom surface of the testing chamber 1. A rectangular limiting groove 501 is formed on the top surface of the support platform 5, and a stepped groove 5011 is formed on the limiting groove 501. A heat-conducting plate 7 for placing the fire-retardant material sample to be tested is mounted on the stepped groove 5011. A heating tube 2, electrically connected to a controller, is mounted at the bottom of the rectangular limiting groove 501. Fins are evenly distributed on the surface of the heating tube 2. A chassis 6 is mounted at the rear end of the testing chamber 1. The airflow simulation component 3 is installed inside the chassis 6. An airflow channel 101 is provided between the side wall of the 6th side and the rear side wall of the detection chamber 1. Multiple air inlets 102 communicating with the airflow channel 101 are equidistantly opened on the side wall of the detection chamber 1. Multiple downwardly inclined guide plates 103 are equidistantly installed on the inner wall of the detection chamber 1. The guide plates 103 are located between adjacent air inlets 102. The airflow simulation component 3 includes a blower 301 and a speed controller 302, and the air outlet of the blower 301 is connected to the airflow channel 101. The thermal conductivity test module 4 includes a thermocouple sensor 401 and a data acquisition unit 402. The thermocouple sensor 401 is evenly distributed in the limiting groove 501 of the support platform 5. Its top extends to the through hole on the heat conduction plate 7 and contacts the sample to be tested. The data acquisition unit 402 is installed on the side wall of the detection chamber 1 and connected to the thermocouple sensor 401 through a signal line.

[0020] In use, the fire-retardant material sample to be tested is placed on the surface of the heat-conducting plate 7, the door at the front end of the detection chamber 1 is closed, and the controller is started to set the target temperature and airflow parameters. After the heating tube 2 is powered on, its surface fins uniformly heat the limiting groove 501 through radiation and convection. The heat is conducted to the sample surface through the heat-conducting plate 7. The controller dynamically adjusts the heating power according to the real-time temperature feedback from the thermocouple sensor 401, so that the sample contact surface temperature quickly reaches the set value to form a stable high-temperature test environment. The blower 301 of the airflow simulation component 3 adjusts the wind speed through the speed controller 302. After the airflow is pressurized through the airflow channel 101 between the chassis 6 and the detection chamber 1, it enters the detection chamber 1 from the air inlet 102. The guide plate 103 guides the airflow into a downward-sloping laminar flow to simulate the dynamic impact of hot airflow on the material in a fire. The surface temperature and heat flow distribution data of different positions of the sample are collected in real time by the array-distributed thermocouple sensors 401, and the data acquisition unit 402 records the temperature-time curve simultaneously. The system measures temperature gradients and fluctuation characteristics, and transmits the data to a computer via USB for thermal resistance calculation, thermal conductivity analysis, and thermal stability assessment. This invention utilizes a heating tube and airflow simulation component to precisely control the high-temperature environment and airflow impact intensity within the testing chamber. A guide plate and air inlet structure work together to achieve directional heat flow output, realizing dynamic simulation of high temperatures and airflow disturbances in real fire scenarios, thus improving the accuracy of test data. The use of a temperature-adjustable fixed heating tube, combined with a positioning structure with a limiting groove, eliminates angle and distance positioning errors caused by manual adjustment, significantly shortening the testing cycle. The thermal conductivity testing module employs multi-point distributed thermocouple sensors to comprehensively capture temperature changes on the sample surface. Combined with the influence of airflow impact, this allows for more accurate evaluation of the performance of fire-retardant materials.

[0021] The bearing platform 5 is equipped with a clamping assembly 8, which includes a clamping plate 801, a guide rod 802, and a spring 803. The guide rod 802 is installed in the stepped groove 5011, and two sets of symmetrical clamping plates 801 are slidably installed on the guide rod 802. The end of the guide rod 802 is fitted with a spring 803 for pressing against the end face of the clamping plate 801. The operator places the sample on the heat-conducting plate 7 in the stepped groove 5011 and manually pushes open the clamping plates 801 on both sides. The spring 803 is compressed and stores energy. After the clamping plates 801 are released, the spring 803 releases its elastic force to push the clamping plates 801 to slide axially along the guide rod 802, thereby achieving rapid clamping of the sample and preventing the sample from being displaced due to aerodynamic lift or turbulent vibration. During the test, when the sample expands due to heat, the clamping plate 801 slightly retracts in the opposite direction under the action of the spring 803, which maintains the stability of the clamping force and avoids thermal stress damage caused by rigid clamping.

[0022] The chassis 6 houses a cooling water tank 9 and a water pump 10. The inlet of the water pump 10 is connected to the cooling water tank 9. A serpentine cooling water circulation pipe 11 is installed in the rectangular limiting groove 501 of the support platform 5. The cooling water circulation pipe 11 contacts the bottom surface of the heat-conducting plate 7 and is located above the heating pipe 2. One end of the pipe penetrates the detection chamber 1 and the side wall of the chassis 6 and is connected to the outlet of the water pump 10. The other end penetrates the detection chamber 1 and the side wall of the chassis 6 and is connected to the cooling water tank 9. The cooling water tank 9 is equipped with a semiconductor cooling chip 901, and the outer wall of the cooling water circulation pipe 11 is wrapped with a graphene thermally conductive coating. After the test, the water pump 10 is started. As the cooling water flows through the cooling water circulation pipe 11, it absorbs the heat from the heat-conducting plate and the sample to be tested, and directly conducts the heat to the cooling water tank 9 inside the chassis 6. Combined with the cooling chip 901, the water tank is cooled, which significantly shortens the cooling waiting time and allows the detection chamber 1 to quickly enter the next test cycle, thus improving work efficiency.

[0023] The thermal conductivity testing module 4 also includes an infrared thermal imager 403, whose lens is aimed at the heat-conducting plate 7 and fixed to the top inner wall of the detection cavity 1 through a connecting plate; under the disturbance environment of the airflow simulation component 3, the infrared thermal imager 403 scans the surface of the fire-retardant material through the lens, records the transient temperature fluctuation of the sample surface, and obtains dynamic data such as the thermal diffusion rate of the fire-retardant material by combining the contact data of the thermocouple 401.

[0024] The box door has a rectangular opening 1011, and a high-temperature resistant glass observation window is installed in the rectangular opening 1011; this allows the operator to visually observe the changes in the state of the fire-retardant material sample under high temperature and airflow impact during the test.

[0025] Work process:

[0026] When using it, place the fire-retardant material sample to be tested on the surface of the heat-conducting plate 7, close the door at the front end of the detection chamber 1, and start the controller to set the target temperature and airflow parameters. After the heating tube 2 is powered on, the fins on its surface uniformly heat the limiting groove 501 through radiation and convection. The heat is conducted to the sample surface through the heat conduction plate 7. The controller dynamically adjusts the heating power according to the real-time temperature feedback from the thermocouple sensor 401, so that the sample contact surface temperature quickly reaches the set value to form a stable high-temperature test environment. The blower 301 of the airflow simulation component 3 adjusts the wind speed through the speed controller 302. After the airflow is pressurized through the airflow channel 101 between the chassis 6 and the detection chamber 1, it enters the detection chamber 1 from the air inlet 102. The guide plate 103 guides the airflow into a downward-sloping laminar flow to simulate the dynamic impact of hot airflow on materials in a fire. The surface temperature and heat flow distribution data of different positions of the sample are collected in real time by the array-distributed thermocouple sensors 401. The data acquisition unit 402 synchronously records the temperature-time curve, temperature gradient and fluctuation characteristics, and transmits them to the computer through the USB interface for thermal resistance calculation, thermal conductivity analysis and thermal stability assessment.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A device for testing the performance of fire-retardant materials, characterized in that: The fire-retardant material performance testing device includes a testing chamber (1), a heating tube (2), an airflow simulation component (3), a thermal conductivity testing module (4), a support platform (5), a chassis (6), and a heat-conducting plate (7). The testing chamber (1) is a rectangular box with a door at the front end. A support platform (5) is installed on the bottom surface of the testing chamber (1). A rectangular limiting groove (501) is opened on the top surface of the support platform (5). A stepped groove (5011) is opened on the limiting groove (501). A heat-conducting plate (7) for placing the fire-retardant material sample to be tested is installed on the stepped groove (5011). A heating tube (2) electrically connected to a controller is installed at the bottom of the rectangular limiting groove (501). Fins are evenly distributed on the surface of the heating tube (2). A chassis (6) is installed at the rear end of the testing chamber (1). An airflow simulation component (3) is installed inside the chassis (6). The side wall of the chassis (6) is perpendicular to the rear side wall of the testing chamber (1). An airflow channel (101) is provided in the middle. Multiple air inlets (102) communicating with the airflow channel (101) are equidistantly opened on the side wall of the detection cavity (1). Multiple downwardly inclined guide plates (103) are equidistantly installed on the inner wall of the detection cavity (1). The guide plates (103) are located between adjacent air inlets (102). The airflow simulation component (3) includes a blower (301) and a speed controller (302). The outlet of the blower (301) is connected to the airflow channel (101). The thermal conductivity test module (4) includes a thermocouple sensor (401) and a data acquisition unit (402). The thermocouple sensor (401) is evenly distributed in the limiting groove (501) of the support platform (5). Its top extends to the through hole on the heat conduction plate (7) and contacts the sample to be tested. The data acquisition unit (402) is installed on the outer wall of the detection cavity (1) and connected to the thermocouple sensor (401) through a signal line.

2. The fire-retardant material performance testing device as described in claim 1, characterized in that: The bearing platform (5) is equipped with a clamping assembly (8), which includes a clamping plate (801), a guide rod (802), and a spring (803). The guide rod (802) is installed in the stepped groove (5011). Two sets of symmetrical clamping plates (801) are slidably installed on the guide rod (802), and the end of the guide rod (802) is fitted with a spring (803) for pressing against the end face of the clamping plate (801).

3. The fire-retardant material performance testing device as described in claim 1, characterized in that: The chassis (6) is equipped with a cooling water tank (9) and a water pump (10). The inlet of the water pump (10) is connected to the cooling water tank (9). The rectangular limiting groove (501) of the support platform (5) is equipped with a serpentine cooling water circulation pipe (11). The cooling water circulation pipe (11) is in contact with the bottom 803 surface of the heat conduction plate (7) and is located above the heating pipe (2). One end of the pipe penetrates the detection cavity (1) and the side wall of the chassis (6) and is connected to the outlet of the water pump (10). The other end penetrates the detection cavity (1) and the side wall of the chassis (6) and is connected to the cooling water tank (9).

4. A fire-retardant material performance testing device as described in claim 1 or 2, characterized in that: The box door has a rectangular opening (1011), and a high-temperature resistant glass observation window is installed in the rectangular opening (1011).

5. A fire-retardant material performance testing device as described in claim 1 or 2, characterized in that: The thermal conductivity test module (4) also includes an infrared thermal imager (403), whose lens is aligned with the heat-conducting plate (7) and fixed to the top inner wall of the test cavity (1) via a connecting plate.

6. The fire-retardant material performance testing device as described in claim 3, characterized in that: The cooling water tank (9) is provided with a semiconductor cooling chip (901) on the outside, and the outer wall of the cooling water circulation pipe (11) is wrapped with a graphene thermal conductive coating.

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