A fire retardant coating combustion test apparatus

Abstract

The utility model discloses a fire -retardant paint combustion testing arrangement, specifically relates to fire -retardant paint test field, including work table, install the combustion box on the work table, the combustion box inner chamber rear side is equipped with the rotation's bearing platform, install detachable paint board on the bearing platform, the paint board outside is provided with a plurality of spoiler, and the spoiler agitates the airflow in the combustion box interior when rotating with the bearing platform, the top and the below of bearing platform all are provided with the burner, install the servo motor of drive bearing platform rotation and the servo push rod of drive bearing platform movement on the combustion box rear side outer wall, when rotating in the combustion box interior, the servo push rod promotes the back -and -forth movement of bearing platform in the combustion box interior. The utility model cooperates with the gas control spare to engrave the real fire scene turbulent airflow and different stage gas environment through the spoiler, and the full -range test is realized to the compound movement of bearing platform compound and double burner, and the data reliability is effectively promoted.

Description

Technical Field

[0001] This utility model relates to the field of fire-retardant coating testing, and more specifically, to a fire-retardant coating combustion testing device. Background Technology

[0002] Fire-retardant coatings are applied to the surface of flammable materials to improve their fire resistance, slow the spread of flames, or prevent combustion for a certain period. These coatings are also called flame-retardant coatings. Fire-retardant coatings are special coatings applied to the surface of combustible substrates to reduce the flammability of the coated material, inhibit the rapid spread of fire, and improve the fire resistance limit of the coated material. They are special coatings applied to the surface of combustible substrates to change the surface combustion characteristics of the material and inhibit the rapid spread of fire; or applied to building components to improve the fire resistance limit of the components.

[0003] Patent CN201821733790.4 discloses a combustion testing device for fire-retardant coatings, including a base plate and a positioning platform. The positioning platform is integrally formed at the top of the base plate. A groove is formed at the front end of the positioning platform, and a back plate slides into one side of the groove. C-shaped sliders protrude from both ends of the back plate, sliding into the C-shaped inner grooves at the upper and lower ends of the groove. A D-shaped protrusion protrudes from the front end of the back plate, sliding into the D-shaped inner groove of the front wall of the groove. A sample extends from the front opening of the groove on the front end of the back plate, and the surface of the sample is coated with fire-retardant coating. This device solves the problems of the sample easily wobbling at the front end of the positioning platform and the positioning platform easily shifting backward when exposed to flame in existing fire-retardant coating combustion testing devices. Even places within the system that still have some sense of rules...

[0004] In real-life fire scenes, airflow is typically irregular and unnatural, unlike the smooth flow of a normal fire. Instead, the thermal effects of the fire, structural obstructions, and gas changes create unique airflow patterns. Existing fire-retardant coating combustion testing devices place samples on a positioning platform, simulating an open fire environment with often smooth airflow. This lack of a sufficiently realistic fire simulation environment leads to discrepancies between the test data and actual fire conditions. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a fire-retardant coating combustion testing device, including a workbench, on which a combustion chamber is installed. A rotating support platform is provided on the rear side of the inner cavity of the combustion chamber. A detachable coating plate is installed on the support platform. Several baffles are provided on the outer side of the coating plate. When the baffles rotate with the support platform, they agitate the airflow inside the combustion chamber. Burners are provided above and below the support platform. A servo motor for driving the rotation of the support platform and a servo push rod for driving the movement of the support platform are installed on the outer wall of the rear side of the combustion chamber. When the support platform rotates inside the combustion chamber, the servo push rod pushes the support platform to move back and forth inside the combustion chamber. Gas control components for injecting air or inert gas into the combustion chamber are installed on both outer walls of the combustion chamber.

[0006] In a preferred embodiment, an exhaust pipe is installed on the top of the combustion chamber, a control panel for adjusting and controlling the servo motor, servo push rod and gas control components is on the outer wall of the combustion chamber, and a temperature sensor is installed on the top of the inner cavity of the combustion chamber.

[0007] In a preferred embodiment, the combustion chamber is provided with a hinged door on the front side, and a transparent observation window is embedded in the door. The combustion chamber is configured with inner and outer double layers, and heat-insulating bricks are filled between the inner and outer layers.

[0008] In a preferred embodiment, the transfer platform is configured as a frustum shape, and two symmetrically arranged clamping plates are installed in the middle of the transfer platform. The end of the coating board is attached to the surface of the transfer platform, and the two clamping plates are clamped to the outer walls on both sides of the coating board.

[0009] In a preferred embodiment, the end of the coating plate that is attached to the surface of the transfer platform is provided with a mating hole, and a fastening nut is inserted into the clamp plate. The fastening nut passes through the mating hole to install and remove the coating plate on the transfer platform.

[0010] In a preferred embodiment, four spoilers are provided and surround the outside of the coating plate. The spoilers are fixed to the surface of the transfer platform, and the four spoilers are all curved with different curvature directions.

[0011] In a preferred embodiment, a bearing is installed on the rear side wall of the rotating platform, and the bearing and the rotating platform are arranged in concentric circles. The servo push rod output shaft passes through the combustion chamber and is connected to the outer ring of the bearing.

[0012] In a preferred embodiment, the output shaft of the servo motor is connected to a drive tube, which extends through the combustion chamber to the rear side of the rotating platform. A prism-shaped through hole is opened inside the drive tube, and a prism rod that moves back and forth is inserted into the through hole. The end of the prism rod is fixed to the middle of the rear side wall of the rotating platform.

[0013] In a preferred embodiment, the gas control component includes an external fan, a gas cylinder, and a gas pipe that penetrates the combustion chamber and is mounted on the outer wall of the combustion chamber. One end of the gas pipe extends into the interior of the combustion chamber and a three-way valve is installed at the other end. The other two ports of the three-way valve are connected to the external fan and the gas cylinder respectively through pipelines.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention replicates the turbulent airflow and gas environment at different stages of a real fire scene through the coordinated use of a baffle and gas control components. Combined with the composite motion of the transfer platform and dual burners, it achieves comprehensive testing and effectively improves data reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear part of the combustion chamber of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the combustion chamber of this utility model;

[0019] Figure 4 For the present utility model Figure 3 Detailed structural diagram of point A in the middle.

[0020] Explanation of reference numerals in the attached drawings: 1. Workbench, 2. Combustion chamber, 3. Transfer platform, 4. Paint plate, 5. Baffle plate, 6. Burner, 7. Servo motor, 8. Servo push rod, 9. Exhaust pipe, 10. Control panel, 11. Chamber door, 12. Observation window, 13. Insulating brick, 14. Clamping plate, 15. Temperature sensor, 16. Fastening nut, 17. Bearing, 18. Drive tube, 19. Prism rod, 20. External fan, 21. Gas cylinder, 22. Gas pipe, 23. Three-way valve. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] As shown in Figure 1-4, a fire-retardant coating combustion testing device includes a workbench 1, on which a combustion chamber 2 is mounted. A rotating support platform 3 is provided on the rear side of the inner cavity of the combustion chamber 2. A detachable coating plate 4 is mounted on the support platform 3. Several baffles 5 are provided on the outer side of the coating plate 4. When the baffles 5 rotate with the support platform 3, they agitate the airflow inside the combustion chamber 2. Burners 6 are provided above and below the support platform 3. A servo motor 7 for driving the rotation of the support platform 3 and a servo push rod 8 for driving the movement of the support platform 3 are installed on the outer wall of the rear side of the combustion chamber 2. When the support platform 3 rotates inside the combustion chamber 2, the servo push rod 8 pushes the support platform 3 to move back and forth inside the combustion chamber 2. Gas control components for injecting air or inert gas into the combustion chamber 2 are installed on both outer walls of the combustion chamber 2.

[0023] Based on the above, the workbench 1 provides a stable installation foundation for the entire device, and the combustion chamber 2 forms a sealed test space to simulate the fire environment. The rotating platform 3 is rotatable and can move back and forth under the push of the servo push rod 8. The detachable coating plate 4 on it is used to support the fireproof coating to be tested, ensuring that the coating plate 4 can be adjusted in position with the rotating platform 3. When the baffle 5 on the outside of the coating plate 4 rotates with the rotating platform 3, it can break the stable air flow state inside the combustion chamber 2, simulating the turbulent airflow formed by thermal effects and structural obstruction in a real fire. The burners 6 above and below the rotating platform 3 can burn the fireproof coating on the coating plate 4 from multiple angles, avoiding test deviations caused by combustion in one direction. The servo motor 7 provides rotational power to the rotating platform 3, and the servo push rod 8 drives the rotating platform 3 to move back and forth. The two work together to make the coating plate 4 come into contact with the flame and airflow in all directions. The gas control component can inject air or inert gas into the combustion chamber 2 to adjust the oxygen concentration and gas composition inside the chamber, simulating the gas environment at different stages of a fire and improving the realism of the test scenario.

[0024] An exhaust pipe 9 is installed on the top of the combustion chamber 2. A control panel 10 is provided on the outer wall of the combustion chamber 2 to adjust and control the servo motor 7, the servo push rod 8 and the gas control components. A temperature sensor 15 is installed on the top of the inner cavity of the combustion chamber 2.

[0025] Based on the above, the exhaust pipe 9 is used to promptly discharge the exhaust gas generated during combustion in the combustion chamber 2, preventing the accumulation of exhaust gas from affecting the test environment and the combustion state of the coating, and ensuring test safety; the control panel 10 serves as the centralized control hub, which can precisely adjust the rotation speed of the servo motor 7, the moving distance of the servo push rod 8, and the gas injection volume of the gas control component, realizing the coordinated operation of various components and simplifying the operation process; the temperature sensor 15 monitors the temperature changes inside the combustion chamber 2 in real time and feeds the temperature data back to the control panel 10, providing key environmental parameter support for analyzing the combustion performance of fireproof coatings at different temperatures, and ensuring the accuracy of test data.

[0026] The combustion chamber 2 is provided with a hinged door 11 on the front side, and a transparent observation window 12 is embedded in the door 11. The combustion chamber 2 is configured with inner and outer double layers, and heat insulation bricks 13 are filled between the inner and outer double layers.

[0027] Based on the above, the hinged door 11 can be opened and closed flexibly. When closed, it forms a sealed space in the combustion chamber 2, preventing external air from interfering with the internal simulated fire environment. When open, it facilitates the installation and replacement of the coating plate 4 and the internal maintenance of the device. The transparent observation window 12 is made of high-temperature resistant transparent material, allowing real-time observation of the combustion state, flame shape, and airflow changes of the coating plate 4 inside the combustion chamber 2 without opening the door 11, which is convenient for testers to record the test process. The double-layer structure of the combustion chamber 2 and the heat-insulating bricks 13 filling the middle can effectively block the high temperature inside the chamber from being transferred to the outside, preventing the outer wall of the chamber from overheating and causing burns to personnel. At the same time, it reduces heat loss inside the chamber, maintains a stable test temperature environment, and ensures the reliability of the test results.

[0028] The receiving platform 3 is configured as a frustum, and two symmetrically arranged clamping plates 14 are installed in the middle of the receiving platform 3. The end of the coating board 4 is attached to the surface of the receiving platform 3, and the two clamping plates 14 are clamped on the outer walls on both sides of the coating board 4.

[0029] The rotating platform 3 is designed in the shape of a frustum, which is more conducive to dispersing the force on the coating plate 4 than a planar structure. At the same time, it reduces the flow resistance of the airflow on the surface of the rotating platform 3, ensuring that the baffle plate 5 can form a more uniform turbulent state when stirring the airflow. The two symmetrically arranged clamping plates 14 can clamp and fix the coating plate 4 from both sides, so that the end of the coating plate 4 is tightly attached to the surface of the rotating platform 3. This prevents the coating plate 4 from shifting or shaking during the rotation or movement of the rotating platform 3, ensuring that the coating plate 4 is always in the preset test position, and ensuring the stability of the combustion test and the consistency of the test data.

[0030] The coating plate 4, which is attached to the surface of the transfer platform 3, has a mating hole at its end. A fastening nut 16 is inserted into the clamping plate 14. The fastening nut 16 passes through the mating hole to install and remove the coating plate 4 from the transfer platform 3. The mating hole at the end of the coating plate 4 and the fastening nut 16 on the clamping plate 14 form a detachable connection structure. During installation, the end of the coating plate 4 is attached to the surface of the transfer platform 3 so that the mating hole is aligned with the nut hole on the clamping plate 14. Then, the fastening nut 16 is passed through the mating hole and tightened to firmly fix the coating plate 4 to the transfer platform 3. During disassembly, the servo push rod 8 pushes the transfer platform 3 to move towards the front of the combustion chamber 2. When it moves to the front of the chamber door 11, simply loosen the fastening nut 16 and pull it out to quickly remove the coating plate 4. This structure not only further enhances the fixing stability of the coating plate 4, but also enables the rapid replacement of the coating plate 4, adapting to the testing needs of different specifications and types of fireproof coatings, and improving the testing flexibility and operating efficiency of the device.

[0031] Four baffles 5 are arranged around the outside of the coating plate 4. The baffles 5 are fixed to the surface of the transfer platform 3. The four baffles 5 are all curved and have different curvature directions. The four baffles 5 are arranged around the outside of the coating plate 4, which can synchronously agitate the airflow from all sides of the coating plate 4, avoiding the turbulent and uneven airflow caused by unidirectional turbulence. The baffles 5 are fixed to the surface of the transfer platform 3 and can rotate synchronously with the transfer platform 3 to ensure that the airflow agitation is continuous and stable. The curved design is easier to cut and guide the airflow than the straight plate design. The different curvature directions can make each baffle 5 generate airflow disturbances in different directions. The interaction forms a complex and turbulent airflow that is close to the real fire scene. This effectively solves the problem that the simulated airflow of the existing device deviates greatly from the real fire scene. It ensures that the fireproof coating is tested in a real airflow environment and improves the reference value of the test results.

[0032] A bearing 17 is installed on the rear side wall of the rotating platform 3. The bearing 17 and the rotating platform 3 are arranged in concentric circles. The output shaft of the servo push rod 8 passes through the combustion chamber 2 and connects to the outer ring of the bearing 17. The concentric arrangement of the bearing 17 and the rotating platform 3 ensures that the force direction of the bearing 17 is consistent with the rotation center of the rotating platform 3 when the platform 3 rotates, avoiding mechanical wear caused by eccentricity. The output shaft of the servo push rod 8 is connected to the outer ring of the bearing 17. When the servo push rod 8 pushes or pulls the bearing 17, the outer ring of the bearing 17 can drive the rotating platform 3 to move back and forth with the action of the servo push rod 8, while the inner ring of the bearing 17 rotates with the rotating platform 3. The relative rotation of the two can greatly reduce the frictional resistance of the rotating platform 3 during the back and forth movement, ensuring that the rotating platform 3 can rotate stably and move back and forth smoothly, avoiding mechanical jamming that affects the testing process and extending the service life of the device.

[0033] The output shaft end of the servo motor 7 is connected to a drive tube 18. The drive tube 18 extends through the combustion chamber 2 to the rear side of the rotating platform 3. A prism-shaped through hole is opened inside the drive tube 18. A prism rod 19 that moves back and forth is inserted into the through hole. The end of the prism rod 19 is fixed to the middle of the rear side wall of the rotating platform 3.

[0034] Based on the above, the servo motor 7 drives the drive tube 18 to rotate through the output shaft. The prism-shaped through hole inside the drive tube 18 forms a spline connection with the prism rod 19. This structure ensures that when the drive tube 18 rotates, it can drive the prism rod 19 to rotate synchronously through the inner wall of the through hole, thereby driving the rotating platform 3 to rotate. At the same time, the prism rod 19 can move back and forth in the prism-shaped through hole of the drive tube 18 without affecting the servo push rod 8 to push the rotating platform 3 to move back and forth. This realizes the composite motion function of the rotating platform 3 of "rotation + back and forth movement", ensuring that the coating plate 4 can contact the flame and airflow in all directions, avoiding test blind spots and improving the comprehensiveness of the test.

[0035] The gas control components include an external fan 20, a gas cylinder 21, and a gas pipe 22 that penetrates the combustion chamber 2 and are installed on the outer wall of the combustion chamber 2. One end of the gas pipe 22 extends into the interior of the combustion chamber 2 and a three-way valve 23 is installed at the other end. The other two ports of the three-way valve 23 are connected to the external fan 20 and the gas cylinder 21 respectively through pipelines.

[0036] Based on the above, the gas control component switches the gas source via a three-way valve 23. When simulating an oxygen-rich combustion environment in the early stages of a fire, the three-way valve 23 is adjusted to connect the external fan 20 to the gas pipe 22. The external fan 20 pressurizes external air and injects it into the combustion chamber 2 through the gas pipe 22, increasing the oxygen concentration inside the chamber. When simulating an oxygen-deficient combustion environment in the later stages of a fire, the three-way valve 23 is adjusted to connect the gas cylinder 21 (containing inert gas, such as nitrogen) to the gas pipe 22. The inert gas is injected into the combustion chamber 2 through the gas pipe 22, reducing the oxygen concentration inside the chamber. One end of the gas pipe 22 extends into the interior of the combustion chamber 2, ensuring that the gas can be directly injected into the test space, quickly adjusting the gas composition inside the chamber, achieving accurate simulation of the gas environment at different fire stages, further improving the realism of the test scenario, and providing more comprehensive test conditions for the performance evaluation of fire-retardant coatings.

[0037] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A fire-retardant coating combustion testing device, characterized in that, The device includes a workbench on which a combustion chamber is mounted. A rotating support platform is located on the rear side of the combustion chamber's inner cavity. A detachable coating plate is mounted on the support platform. Several baffles are arranged on the outer side of the coating plate, agitating the airflow inside the combustion chamber as the support platform rotates. Burners are located above and below the support platform. A servo motor for driving the rotation of the support platform and a servo push rod for driving the movement of the support platform are mounted on the rear outer wall of the combustion chamber. When the support platform rotates inside the combustion chamber, the servo push rod pushes the support platform to move back and forth inside the combustion chamber. Gas control components for injecting air or inert gas into the combustion chamber are installed on both outer walls of the combustion chamber.

2. The fire-retardant coating combustion testing device according to claim 1, characterized in that: An exhaust pipe is installed on the top of the combustion chamber. A control panel for adjusting and controlling the servo motor, servo push rod, and gas control components is located on the outer wall of the combustion chamber. A temperature sensor is installed on the top of the inner cavity of the combustion chamber.

3. The fire-retardant coating combustion testing device according to claim 1, characterized in that: The combustion chamber is equipped with a hinged door on the front side, and a transparent observation window is embedded in the door. The combustion chamber is configured with inner and outer double layers, and heat insulation bricks are filled between the inner and outer layers.

4. The fire-retardant coating combustion testing device according to claim 1, characterized in that: The receiving platform is shaped like a frustum, and two symmetrically arranged clamping plates are installed in the middle of the receiving platform. The end of the coating board is attached to the surface of the receiving platform, and the two clamping plates hold the outer walls on both sides of the coating board.

5. The fire-retardant coating combustion testing device according to claim 4, characterized in that: The end of the coating board that is attached to the surface of the transfer platform has a mating hole, and a fastening nut is inserted into the clamp plate. The fastening nut passes through the mating hole to install and remove the coating board on the transfer platform.

6. The fire-retardant coating combustion testing device according to claim 1, characterized in that: The spoilers are configured as four and surround the outside of the coating plate. The spoilers are fixed to the surface of the transfer platform. The four spoilers are all curved and have different curvature directions.

7. The fire-retardant coating combustion testing device according to claim 4, characterized in that: A bearing is installed on the rear side wall of the rotating platform. The bearing and the rotating platform are arranged in concentric circles. The servo push rod output shaft passes through the combustion chamber and is connected to the outer ring of the bearing.

8. The fire-retardant coating combustion testing device according to claim 4, characterized in that: The output shaft of the servo motor is connected to a drive tube, which extends through the combustion chamber to the rear side of the rotating platform. A prism-shaped through hole is opened inside the drive tube, and a prism rod that moves back and forth is inserted into the through hole. The end of the prism rod is fixed to the middle of the rear side wall of the rotating platform.

9. The fire-retardant coating combustion testing device according to claim 1, characterized in that: The gas control components include an external fan, a gas cylinder, and a gas pipe that runs through the combustion chamber and is installed on the outer wall of the combustion chamber. One end of the gas pipe extends into the interior of the combustion chamber and the other end is equipped with a three-way valve. The other two ports of the three-way valve are connected to the external fan and the gas cylinder respectively through pipelines.

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