A dynamic thermal insulation test device and method for fire doors

Abstract

This invention discloses a dynamic heat insulation testing device and method for fire doors, relating to the field of fire door testing technology. The device includes a base frame, a pusher, a stationary wall, a closing wall, an electronic flame source, an adapter frame, a lifting block, an expansion joint, a horizontal bar, a shuttle rod, an airflow baffle, and a testing component. The stationary wall is used to fix the fire door under test. A displacement drive assembly within the closing wall drives the lifting block and the testing component to move vertically up and down. The expansion joint dynamically adjusts the distance between the testing component and the fire door based on the detection data from the end-position distance probe. The shuttle rod and airflow baffle reduce airflow turbulence. The end-position temperature probe and the airflow temperature probe respectively detect the surface temperature of the fire door and the airflow temperature. This invention can dynamically follow the deformation of the fire door to maintain the detection distance while reducing the influence of airflow turbulence, significantly improving the detection accuracy and reliability of fire door heat insulation performance testing.

Description

Technical Field

[0001] This invention relates to the field of fire door testing technology, and in particular to a dynamic heat insulation testing device and method for fire doors. Background Technology

[0002] Fire doors are a core component of a building's fire-resistant partition system, and their thermal insulation performance directly determines the safe evacuation time and the extent of property damage during a fire. Currently, the industry generally uses static testing methods to evaluate the thermal insulation performance of fire doors. Temperature probes are pre-fixed at a fixed distance from the fire door surface, and the probe position remains unchanged during the test. The thermal insulation effect is assessed by collecting surface temperature and ambient air temperature data.

[0003] However, this static testing method can no longer meet the needs of the modern fire door industry's industrialization and standardization, and has some technical defects that restrict the industry's development: First, fire doors will undergo complex deformations such as warping, bulging, and sagging to varying degrees under high-temperature burning, causing the actual distance between the probe and the surface of the fire door to deviate significantly from the preset value, resulting in significant temperature detection errors. This makes it impossible to accurately reflect the true heat insulation performance of the fire door, often leading to the misjudgment and elimination of qualified products or the entry of unqualified products into the market, causing huge economic losses to enterprises and posing significant safety hazards. Second, the structural design of traditional airflow detection devices is unreasonable, which can easily generate strong turbulence in the natural airflow in the test chamber, destroying the original flow state of the airflow and causing the airflow temperature measurement results to be distorted. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] A dynamic heat insulation testing device for fire doors includes a base frame and a pusher. A fixed mounting wall and a sliding closing wall are fixedly installed on the upper side of the base frame. The output end of the pusher is connected to the closing wall. The fixed mounting wall is equipped with an electronic flame source. An adapter blocking frame is installed in the inner perimeter of the fixed mounting wall. The fire door to be tested is clamped into the inner perimeter of the adapter blocking frame. The closing wall is equipped with a lifting block, an expansion joint, and two horizontal bars distributed on the upper and lower sides of the expansion joint. The expansion joint, the horizontal bars, and the lifting block are fixedly connected. The horizontal bars are equipped with multiple horizontal distance probes. The closing wall is equipped with a displacement drive component that drives the lifting block to move vertically up and down. The output end of the telescopic device is equipped with a shuttle rod. The shuttle rod is equipped with multiple vertically distributed airflow baffles. The shuttle rod has multiple airflow detection channels. The airflow detection channels are arranged at intervals with the airflow baffles. The shuttle rod is also positioned and inserted with a detection element. The end face of the detection element facing the fire door to be tested is embedded with an end position temperature probe and an end position distance probe distributed above and below the end position temperature probe. The detection element is also equipped with multiple airflow grooves aligned with the airflow detection channels. Airflow temperature probes are installed on the inner wall of the airflow grooves.

[0006] Preferably, the retaining wall includes a fixing plate and a firewall body located on the upper side of the fixing plate. The fixing plate has multiple mounting holes, and the base frame is provided with multiple fixing screws. The fixing screws pass through the mounting holes and are fitted with nuts. The closing wall includes a sliding plate and a sliding wall body located on the upper side of the sliding plate. The base frame has a slide rail groove, and the bottom side of the sliding plate has a sliding structure installed at the position of the slide rail groove. The sliding wall body has an opening annular groove on the opening side facing the firewall body, and the firewall body has an outer protruding ring that mates with the opening annular groove.

[0007] Preferably, the adapter frame has an inner groove on the side facing the electronic fire source, and the fire door to be tested is fitted into the inner groove. The retaining wall has a combination structure of multiple vertical and horizontal blocks inside. Each vertical block has a positioning screw hole along the vertical direction, and an inner limiting screw is installed at the position of the positioning screw hole. A locking nut is installed on the inner limiting screw, and a contact plate that abuts against the fire door to be tested is provided on the side end of the inner limiting screw. Each horizontal block has a locking screw hole, and the adapter frame has multiple insertion holes aligned with the locking screw holes. Outer limiting screws are installed at the insertion holes and locking screw holes.

[0008] Preferably, the displacement drive assembly includes a servo motor, a drive screw, and a guide rod. The servo motor is mounted on the top of the closing wall, the drive screw is movably mounted inside the closing wall, and the guide rod is fixedly mounted inside the closing wall. The lifting block has a vertical screw hole through which the drive screw is screwed. A guide plate is provided on one side of the lifting block, and the guide plate has a vertical guide hole through which the guide rod movably passes.

[0009] Preferably, the telescopic output end is provided with a telescopic end plate, one end of the shuttle rod is fixedly connected to the telescopic end plate, a PIN slot is opened on the outer end face of the telescopic end plate, and a PIN plug that mates with the PIN slot is provided on the side end of the detection component.

[0010] Preferably, the shuttle member has a shuttle-shaped cross-section and an axial slot. The airflow detection channel includes vertically distributed narrow channels and wide openings located above and below the narrow channels. The detection component includes a shuttle end plate and a detection insert plate fixedly connected to the shuttle end plate. The detection insert plate is inserted into the axial slot, and airflow grooves are vertically formed on the detection insert plate.

[0011] Preferably, the airflow baffle is disc-shaped, and the airflow detection channel vertically penetrates the tip area of ​​the shuttle's top and bottom.

[0012] Preferably, both the retaining wall and the closing wall are provided with natural ventilation windows that connect to the outside, and the natural ventilation windows are equipped with electrically operated opening and closing covers.

[0013] This invention also provides a dynamic heat insulation test method for fire doors, using the dynamic heat insulation test equipment for fire doors described in any of the above-mentioned claims, comprising the following steps: S1. The fire door to be tested is clamped into the inner circumference of the adapter blocking frame, and the adapter blocking frame limiting clip is clamped into the inner circumference of the fixed wall. S2. The pusher pushes the closing wall toward the fixed wall to complete the assembly of the fixed wall and the closing wall. S3. The displacement drive component drives the lifting block to complete a single vertical full-stroke movement. S4. During the movement, the horizontal distance probe performs initial state detection of the distance to the surface of the fire door to be tested, and the end distance probe completes the initial detection action. S5. The electronic fire source outputs a fire source of corresponding intensity according to the test setting. S6. The displacement drive component drives the lifting block and the telescopic device to move up and down at a uniform speed. S7. The telescopic device adjusts the position of the shuttle rod and the detection piece in real time according to the detection data of the end distance probe, so that the detection piece and the fire door to be tested maintain a preset distance. S8. During the lifting process, the airflow is diverted by the airflow baffle and flows through the airflow detection channel and the airflow groove, and the airflow temperature probe detects the airflow temperature in real time. S9. The end-position temperature probe monitors the surface temperature of the fire door under test in real time. S10. After the test is completed, the electronic flame source is turned off, the pusher drives the closing wall to reset, and the fire door under test is removed.

[0014] Compared with existing technologies, the beneficial effects of this invention are:

[0015] This invention, by setting end-position distance probes distributed vertically on the testing component, can detect the complex surface deformation of the fire door under test after being heated in real time. With the help of an expansion joint, the extension length of the testing component is dynamically adjusted so that the end-position temperature probes and the surface of the fire door under test always maintain a fixed detection distance. This solves the industry problem of large temperature detection errors caused by fire door deformation in traditional static tests.

[0016] Meanwhile, the present invention uses a shuttle-shaped structure shuttle rod in conjunction with a disc-shaped airflow baffle, combined with a wide-narrow-wide gradient design of the airflow detection channel, which makes the airflow entering and exiting the airflow detection channel more stable, which can significantly reduce the turbulence effect on the surrounding airflow, significantly improve the accuracy and repeatability of airflow temperature detection, and ensure that the test data can truly reflect the actual heat insulation performance of the fire door. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall installation and assembly of the device of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the retaining wall and the closing wall in this invention.

[0019] Figure 3 This is a schematic diagram of the structure of the retaining wall and the adapter frame in this invention.

[0020] Figure 4 for Figure 3A magnified structural diagram of part A in the middle.

[0021] Figure 5 This is a schematic diagram of the internal structure of the closure wall in this invention.

[0022] Figure 6 This is a schematic diagram of the structure of the lifting block, telescopic device, shuttle rod, and airflow baffle in this invention.

[0023] Figure 7 for Figure 6 A structural disassembly diagram of each component.

[0024] Figure 8 This is a schematic diagram of the shuttle rod and airflow baffle in this invention.

[0025] Figure 9 for Figure 8 A schematic diagram of the structure of the other end of the shuttle rod.

[0026] Figure 10 This is a schematic diagram of the detection element in this invention.

[0027] Wherein: 1-Base frame; 101-Slide rail groove; 102-Fixing screw; 2-Fixing wall; 201-Fixing plate; 2011-Mounting hole; 202-Fire wall body; 2021-Outer protruding ring; 203-Vertical block; 2031-Positioning screw hole; 204-Horizontal block; 2041-Locking screw hole; 3-Closing wall; 301-Slide plate; 302-Sliding wall body; 3021-Opening annular groove; 303-Servo motor; 304-Drive screw; 305-Guide rod; 306-Lifting block; 3061-Vertical screw hole; 307-Guide plate; 3071-Vertical guide hole; 4-Adaptive blocking frame; 401-Inner groove; 402-Insertion hole; 5-Electronic fire Source; 6-Inner limit screw; 601-Locking nut; 602-Contact plate; 7-Outer limit screw; 8-Extension joint; 801-Extension end plate; 802-PIN slot; 9-Shuttle rod; 901-Axial slot; 902-Wide opening; 903-Narrow channel; 904-End plate; 10-Airflow baffle; 11-Detection component; 1101-Shuttle end plate; 1102-Detection insert plate; 1103-End position distance probe; 1104-End position temperature probe; 1105-Airflow slot; 1106-Airflow temperature probe; 12-Propeller; 13-Horizontal rod; 1301-Horizontal distance probe; 14-Natural ventilation window; 15-Fire door to be tested. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] Example 1: This invention designs a dynamic heat insulation testing device for fire doors, the specific structural configuration of which is as follows:

[0030] Combination Figure 1 , Figure 2 As shown, a retaining wall 2 is fixedly installed on the upper side of the base frame 1, and a closing wall 3 is slidably installed. The output end of the pusher 12 is connected to the closing wall 3, which is used to drive the closing wall 3 to move toward or away from the retaining wall 2, thereby realizing the automatic opening and closing of the test chamber. The retaining wall 2 is equipped with an electronic fire source 5 to provide a controllable and stable heat source required for the test. The inner circumference of the retaining wall 2 is fitted with an adapter blocking frame 4, and the fire door 15 to be tested is fitted into the inner circumference of the adapter blocking frame 4.

[0031] Combination Figure 1 , Figure 3 , Figure 4 As shown, the fixed wall 2 includes a fixed plate 201 and a fire wall body 202 located on the upper side of the fixed plate 201. The fixed plate 201 has multiple mounting holes 2011, and the base frame 1 is provided with multiple fixing screws 102. The fixing screws 102 pass through the mounting holes 2011 and are fitted with nuts to achieve a detachable and fixed connection between the fixed wall 2 and the base frame 1. The adapter frame 4 adopts a standardized modular design. An inner groove 401 is provided on the side facing the electronic fire source 5. The fire door 15 to be tested is snapped into the inner groove 401. The corresponding model of the adapter frame 4 can be quickly replaced according to the size and specifications of the fire door 15 to be tested without replacing the main structure of the fixed wall 2. The fixed wall 2 is provided with a combination structure of multiple vertical blocks 203 and horizontal blocks 204 to form a stable universal support frame. The vertical block 203 has multiple sets of positioning screw holes 2031 along the vertical direction. An inner limiting screw 6 is installed at the position of the positioning screw hole 2031, and a locking nut 601 is installed on the inner limiting screw 6 to secure the inner limiting screw 6 to the vertical block 203. The side end of the inner limiting screw 6 is equipped with a contact plate 602 that abuts against the fire door 15 to be tested, for limiting and fixing the fire door 15 to be tested from the inside. The horizontal block 204 has multiple sets of locking screw holes 2041, and the adapter blocking frame 4 has multiple insertion holes 402 aligned with the locking screw holes 2041. An outer limiting screw 7 is installed at the position of the insertion hole 402 and the locking screw hole 2041 to securely fix the adapter blocking frame 4 inside the fixing wall 2.

[0032] Combination Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the closing wall 3 includes a sliding plate 301 and a sliding wall 302 located on the upper side of the sliding plate 301. The base frame 1 has a slide rail groove 101, and the bottom side of the sliding plate 301 has a sliding structure installed at the position of the slide rail groove 101 to achieve a smooth sliding connection between the closing wall 3 and the base frame 1. The sliding wall 302 has an opening annular groove 3021 on the opening side facing the firewall body 202, and the firewall body 202 has an outer protruding ring 2021 that mates with the opening annular groove 3021 to achieve a sealing fit when the stationary wall 2 and the closing wall 3 are closed, reducing heat loss in the test chamber and reducing energy consumption. Both the fixed wall 2 and the closing wall 3 are equipped with natural ventilation windows 14 that connect to the outside. These windows 14 are equipped with electrically operated covers, allowing for automatic adjustment of the cross-section connecting the natural ventilation window 14 to the outside as needed for testing. This controls the ventilation volume within the test chamber, simulating fire scenarios under different building ventilation conditions. (The adjustable natural ventilation window 14 can simulate fire scenarios under different building ventilation conditions, making the test results more valuable and helping companies accurately optimize fire door product design, improve the actual fire resistance and heat insulation performance of the products, and reduce safety hazards and economic losses caused by product design defects.) The closing wall 3 is equipped with a displacement drive assembly that drives the lifting block 306 to move vertically. The displacement drive assembly includes a servo motor 303, a drive screw 304, and a guide rod 305. The servo motor 303 is installed on the top of the closing wall 3, the drive screw 304 is movably installed inside the closing wall 3, and the guide rod 305 is fixedly installed inside the closing wall 3. The lifting block 306 has a vertical screw hole 3061, through which the drive screw 304 is screwed. A guide plate 307 is provided on one side of the lifting block 306, and the guide plate 307 has a vertical guide hole 3071. The guide rod 305 moves through the vertical guide hole 3071 to precisely guide the lifting movement of the lifting block 306, prevent it from deflecting, and ensure the accuracy of the detection position.

[0033] Combination Figure 5 , Figure 6 , Figure 7 As shown, the closing wall 3 is internally equipped with a lifting block 306, an expansion joint 8, and two horizontal bars 13 distributed on the upper and lower sides of the expansion joint 8. The expansion joint 8 and the horizontal bars 13 are both fixedly connected to the lifting block 306. The horizontal bars 13 are equipped with multiple horizontal distance probes 1301 for detecting the overall deformation distribution of the surface of the fire door 15 under test. The output end of the expansion joint 8 is provided with a telescopic end plate 801. The outer end face of the telescopic end plate 801 has a PIN slot 802 for realizing the electrical connection and mechanical positioning of the detection component 11. The detection component 11 adopts a pluggable modular design, allowing for quick replacement of damaged detection probes without the need for complete disassembly of the equipment.

[0034] Combination Figure 6 , Figure 7 , Figure 9As shown, the output end of the telescopic device 8 is equipped with a shuttle rod 9, one end of which is fixedly connected to the telescopic end plate 801. An end plate 904 is provided on the side of the shuttle rod 9 facing the telescopic end plate 801, and the end plate 904 is fixedly connected to the telescopic end plate 801 by bolts. The shuttle rod 9 has a shuttle-shaped cross-section, which effectively reduces the turbulence on the surrounding airflow. The shuttle rod 9 has an axial slot 901 for inserting the detection piece 11. The shuttle rod 9 is provided with multiple vertically distributed airflow baffles 10, which are disc-shaped and made of industrial-grade high-temperature resistant and deformation-resistant material, with a long service life, and can evenly distribute the airflow in the test chamber. The shuttle rod 9 has multiple airflow detection channels, which are arranged at intervals with the airflow baffles 10. Figure 8 , Figure 10 The airflow detection channel includes a vertically distributed narrow channel 903 and wide openings 902 located above and below the narrow channel 903. The wide openings 902 ensure that the airflow in and out rates are lower than the airflow rates in the narrow channel 903, thus minimizing disturbance to the external airflow when the airflow enters and exits the wide openings 902. Furthermore, the high airflow velocity in the narrow channel 903 effectively removes residual heat from the surface of the airflow temperature probe 1106, enabling the probe to accurately detect subsequent airflow temperatures. The airflow detection channel vertically penetrates the tip areas of the shuttle's top and bottom, further reducing interference with the airflow.

[0035] Combination Figure 6 , Figure 7 , Figure 10 As shown, the shuttle member 9 is also equipped with a detection element 11, which includes a shuttle end plate 1101 and a detection insert plate 1102 fixedly connected to the shuttle end plate 1101. The detection insert plate 1102 is inserted into the axial slot 901. The side end of the detection element 11 is provided with a PIN plug that mates with the PIN slot 802, realizing the electrical connection and mechanical positioning between the detection element 11 and the telescopic end plate 801. An end position temperature probe 1104 and two end position distance probes 1103 distributed on the upper and lower sides of the end position temperature probe 1104 are embedded in the end face of the detection element 11 facing the fire door 15 to be tested. The end position distance probes 1103 can detect the surface deformation of the fire door 15 to be tested in advance. Based on the detected distance data, the telescopic device 8 drives the detection element 11 to move synchronously, so that the end position temperature probe 1104 can maintain a fixed close distance with the surface of the fire door 15 to be tested. The detection component 11 is also provided with multiple airflow grooves 1105 aligned with the airflow detection channel. The airflow grooves 1105 are vertically opened on the detection insert plate 1102. An airflow temperature probe 1106 is installed on the inner wall of the airflow groove 1105 to detect the airflow temperature flowing through the airflow detection channel.

[0036] Example 2: This example provides a dynamic heat insulation test method for fire doors, which uses the dynamic heat insulation test equipment for fire doors described in Example 1 above, and includes the following steps:

[0037] Step 1: Select the appropriate model of the adapter frame 4 according to the size and specifications of the fire door 15 to be tested, and install the inner limit screw 6 on the vertical block 203 inside the fixed wall 2 at a position that matches the height range of the fire door 15 to be tested, and tighten the inner limit screw 6 with the locking nut 601.

[0038] Step 2: Securely install the fire door 15 to be tested into the inner groove 401 of the adapter frame 4, ensuring that the fire door fits tightly against the inner wall of the inner groove 401. Then, install the adapter frame 4 together with the fire door 15 to be tested into the inner space of the fixed wall 2.

[0039] Step 3: Install the outer limiting screws 7 sequentially at the corresponding positions of the horizontal block 204 of the fixed wall 2 and the insertion hole 402 of the adapter block frame 4. Tighten the outer limiting screws 7 gradually until the contact plate 602 at the side end of the inner limiting screw 6 tightly abuts against the inner surface of the fire door 15 to be tested, thus completing the firm installation of the fire door 15 to be tested and the adapter block frame 4.

[0040] Step 4: Start the thruster 12 to push the closing wall 3 smoothly towards the stationary wall 2 along the slide rail groove 101 on the base frame 1 until the outer convex ring 2021 of the firewall body 202 is fully embedded in the opening annular groove 3021 of the sliding wall body 302, thus completing the sealing and closing of the stationary wall 2 and the closing wall 3.

[0041] Step 5: Start the servo motor 303, which drives the drive screw 304 to rotate, driving the lifting block 306 to move the telescopic device 8 and the horizontal bar 13 to complete a single vertical full-stroke movement. During the movement, the horizontal distance probe 1301 performs a comprehensive initial state detection of the surface distance of the fire door 15 under test, while the end distance probe 1103 simultaneously completes the initial detection action, records the initial distance data and stores it in the control system, providing a benchmark for subsequent dynamic distance adjustment. At the same time, an initial state report can be generated for easy product quality traceability.

[0042] Step 6: According to the fire protection level requirements set for the test, start the electronic fire source 5 and adjust it to the corresponding intensity of the fire source output to continuously and evenly heat the fire door 15 to be tested.

[0043] Step 7: The servo motor 303 drives the lifting block 306 and the telescopic device 8 to move back and forth at a preset constant speed. At the same time, the telescopic device 8 dynamically adjusts the extension length of the shuttle rod 9 and the detection piece 11 according to the distance data detected in real time by the end distance probe 1103, so that the distance between the detection piece 11 and the fire door 15 to be tested always maintains the preset detection value.

[0044] Step eight: During the lifting and lowering test, the heated airflow within the closing wall 3 is evenly distributed between adjacent airflow baffles 10. The airflow sequentially flows through the wide opening 902 and narrow channel 903 of the shuttle rod 9, the airflow groove 1105 of the detection component 11, the narrow channel 903, and the wide opening 902. The airflow temperature probe 1106 continuously detects the airflow temperature in real time and transmits the data to the control system. The control system collects temperature information and heat distribution data at different heights and distances on the surface of the fire door 15 under test in real time. Combined with the changes in the heating time of the fire door 15 under test (i.e., the changes in the heating time of the fire door 15 under test by the electronic fire source 5), it can automatically generate a visualized temperature distribution cloud map and data analysis report, providing intuitive data support for product quality assessment and technical improvement.

[0045] Step nine: The horizontal distance probe 1301 detects the overall surface deformation of the fire door 15 under test after heating in real time, while the vertical distance probe 1103 detects the local surface deformation of the fire door 15 at the corresponding position of the detection component 11 in real time. All detection data are transmitted to the control system for analysis and processing in real time. Among them, the vertical distance probes 1103 on the upper and lower sides of the vertical temperature probe 1104 can detect the surface deformation of the fire door 15 under test in advance. The telescopic device 8 adjusts the micro-distance between the vertical temperature probe 1104 and the surface of the fire door 15 under test in a timely manner, so that the vertical temperature probe 1104 and the surface of the fire door 15 under test maintain a preset detection distance in real time.

[0046] Step 10: After the preset test duration is reached, the electronic fire source 5 is turned off, and the control system automatically starts the cooling program. The internal temperature of the equipment is accelerated by adjusting the opening and closing degree of the natural ventilation window 14. Once the internal temperature of the equipment drops to a safe range, the pusher 12 drives the closing wall 3 to smoothly reset. The outer limit screw 7 and the inner limit screw 6 are then disassembled in sequence, and the adapter frame 4 and the fire door 15 to be tested are removed, completing this dynamic heat insulation test. All test data is automatically stored in the control system and can be exported for easy data management and quality traceability.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic heat insulation testing device for fire doors, characterized in that: The system includes a base frame (1) and a thruster (12). A fixed mounting wall (2) and a sliding closing wall (3) are fixedly installed on the upper side of the base frame (1). The output end of the thruster (12) is connected to the closing wall (3). The fixed mounting wall (2) is equipped with an electronic fire source (5). The inner perimeter of the fixed mounting wall (2) is fitted with an adapter blocking frame (4). The fire door to be tested is fitted into the inner perimeter of the adapter blocking frame (4). The closing wall (3) is equipped with a lifting block (306), a telescopic device (8), and two horizontal rods (13) distributed on the upper and lower sides of the telescopic device (8). The telescopic device (8) and the horizontal rods (13) are fixedly connected to the lifting block (306). The horizontal rods (13) are equipped with multiple horizontal distance probes (1301). The closing wall (3) is equipped with a device to drive the lifting block. (306) A vertical lifting displacement drive assembly, wherein the output end of the telescopic device (8) is equipped with a shuttle rod (9), the shuttle rod (9) is provided with multiple vertically distributed airflow baffles (10), the shuttle rod (9) is provided with multiple airflow detection channels, the airflow detection channels are arranged at intervals with the airflow baffles (10), the shuttle rod (9) is also positioned and inserted with a detection element (11), the detection element (11) is embedded with an end position temperature probe (1104) and an end position distance probe (1103) distributed on the upper and lower sides of the end position temperature probe (1104) facing the end face of the fire door to be tested, the detection element (11) is also provided with multiple airflow grooves (1105) aligned with the airflow detection channels, and the airflow temperature probe (1106) is installed on the inner wall of the airflow groove (1105). The shuttle rod (9) has a shuttle-shaped cross section and an axial slot (901) is provided on the shuttle rod (9); the airflow detection channel includes a vertically distributed narrow channel (903) and a wide opening (902) located on the upper and lower sides of the narrow channel (903). The detection component (11) includes a shuttle end plate (1101) and a detection insert plate (1102) fixedly connected to the shuttle end plate (1101). The detection insert plate (1102) is inserted into the axial slot (901) and the airflow groove (1105) is vertically opened on the detection insert plate (1102).

2. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: The fixed wall (2) includes a fixed plate (201) and a fire wall body (202) located on the upper side of the fixed plate (201). The fixed plate (201) has multiple mounting holes (2011). The base frame (1) is provided with multiple fixing screws (102). The fixing screws (102) pass through the mounting holes (2011) and are fitted with nuts. The closing wall (3) includes a sliding plate (301) and a sliding wall (302) located on the upper side of the sliding plate (301). The base frame (1) is provided with a slide rail groove (101). The bottom side of the sliding plate (301) is provided with a sliding structure installed at the position of the slide rail groove (101). The sliding wall (302) is provided with an opening annular groove (3021) on the opening side facing the firewall body (202). The firewall body (202) is provided with an outer protruding ring (2021) that cooperates with the opening annular groove (3021).

3. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: The adapter block frame (4) has an inner groove (401) on the side facing the electronic fire source (5), and the fire door to be tested is installed in the inner groove (401). The fixed wall (2) is internally provided with a combination structure of multiple vertical blocks (203) and horizontal blocks (204); The vertical block (203) has a positioning screw hole (2031) in the vertical direction. An inner limit screw (6) is installed at the position of the positioning screw hole (2031). A locking nut (601) is installed on the inner limit screw (6). A contact plate (602) that abuts against the fire door to be tested is provided on the side end of the inner limit screw (6). The horizontal block (204) has a locking screw hole (2041), and the adapter block frame (4) has multiple insertion holes (402) aligned with the locking screw hole (2041). An external limit screw (7) is installed at the insertion hole (402) and the locking screw hole (2041).

4. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: The displacement drive assembly includes a servo motor (303), a drive screw (304), and a guide rod (305). The servo motor (303) is installed on the top of the closure wall (3), the drive screw (304) is movably installed inside the closure wall (3), and the guide rod (305) is fixedly installed inside the closure wall (3). The lifting block (306) has a vertical screw hole (3061), and the driving screw (304) is screwed through the vertical screw hole (3061). A guide plate (307) is provided on one side of the lifting block (306), and a vertical guide hole (3071) is opened on the guide plate (307). The guide rod (305) moves through the vertical guide hole (3071).

5. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: The telescopic device (8) has a telescopic end plate (801) at its output end. One end of the shuttle rod (9) is fixedly connected to the telescopic end plate (801). A PIN slot (802) is opened on the outer end face of the telescopic end plate (801). A PIN plug that mates with the PIN slot (802) is provided on the side end of the detection component (11).

6. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: The airflow baffle (10) is disc-shaped, and the airflow detection channel vertically penetrates the tip area of ​​the shuttle top and bottom of the shuttle rod (9).

7. The dynamic heat insulation testing equipment for fire doors according to claim 1, characterized in that: Both the fixed wall (2) and the closing wall (3) are provided with natural ventilation windows (14) that connect with the outside world, and the natural ventilation windows (14) are equipped with electric opening and closing covers.

8. A method for dynamic heat insulation testing of fire doors, characterized in that, The fire door dynamic heat insulation test equipment according to any one of claims 1 to 7 includes the following steps: S1. Install the fire door to be tested into the inner perimeter of the adapter blocking frame (4), and install the limiting card of the adapter blocking frame (4) into the inner perimeter of the fixed wall (2); S2. The thruster (12) pushes the closing wall (3) toward the retaining wall (2) to complete the assembly of the retaining wall (2) and the closing wall (3); S3. The displacement drive component drives the lifting block (306) to complete a single vertical full-stroke movement; S4. During the movement, the horizontal distance probe (1301) performs initial state detection of the distance to the surface of the fire door to be tested, and the end distance probe (1103) completes the initial detection action; S5. Electronic ignition source (5) outputs an ignition source of corresponding intensity according to the test settings; S6. The displacement drive assembly drives the lifting block (306) and the telescopic device (8) to move back and forth at a constant speed; S7. The expansion joint (8) adjusts the position of the shuttle rod (9) and the detection part (11) in real time according to the detection data of the end distance probe (1103) so that the detection part (11) and the fire door to be tested maintain a preset distance; S8. During the lifting process, the airflow is diverted by the airflow baffle (10) and then flows through the airflow detection channel and the airflow slot (1105). The airflow temperature probe (1106) detects the airflow temperature in real time. S9. The end-position temperature probe (1104) detects the surface temperature of the fire door under test in real time; S10. After the test is completed, turn off the electronic fire source (5), and the pusher (12) drives the closing wall (3) to reset. Take out the fire door to be tested.

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