Device and method for testing thermal resistance temperature of fireproof blanket for electric vehicle
By designing a thermal resistance temperature test device for fire blankets for electric vehicles and using a bracket, burner and AI image recognition sensor to evaluate the fire extinguishing effect of the fire blanket, the problem of being unable to measure the performance of fire blankets in existing technologies was solved, and an efficient and automated testing method was achieved.
Patent Information
- Application Number
- CN202511053559.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-10-14
AI Technical Summary
There are currently no specific devices and methods to measure the fire extinguishing effect of fire blankets for electric vehicles, and it is impossible to evaluate their performance at high temperatures.
A thermal resistance temperature test device for a fire blanket for electric vehicles was designed, which included a bracket, a burner, an AI image recognition sensor, and a torque servo electric cylinder. By clamping the fire blanket and simulating fire conditions, the thermal resistance temperature and flame conditions of the fire blanket were monitored using thermocouples and image recognition sensors.
It realizes the evaluation of fire extinguishing effect of fire blanket in vertical, horizontal and inclined states, automates the test process, avoids human interference, improves test quality and efficiency, and ensures the quality of fire blanket.
Smart Images
Figure CN120778802A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of fire-fighting product detection, and particularly relates to a kind of electric vehicle fire blanket heat resistance temperature Testing device and testing method. BACKGROUND
[0002] The electric vehicle fire blanket is obvious in extinguishing the initial fire, especially in the fire caused by lithium battery thermal runaway, electrical wiring failure, battery failure, charger overload, vehicle spontaneous combustion, external factors, battery overcharge, etc. Covering the ignition point with the fire blanket can isolate the heat source and the flame, control the fire, and gain valuable time for subsequent fire extinguishing. There are various types, performance, specifications, and manufacturers of electric vehicle fire blankets on the market The nominal fire blanket can be used at a temperature of 1000 DEG C to 1300 DEG C.
[0003] How to measure the fire extinguishing effect of the fire blanket is not related to the specific device and method in the industry, so there is an urgent need for a kind of electric vehicle fire blanket heat resistance temperature testing device and testing method to measure the fire extinguishing effect of the fire blanket. SUMMARY
[0004] The application provides a kind of electric vehicle fire blanket heat resistance temperature testing device and testing method, solve the problem that the fire extinguishing effect of the fire blanket cannot be measured, and the fire extinguishing effect of the fire blanket can be measured.
[0005] The application is realized by the following technical solutions: A kind of electric vehicle fire blanket heat resistance temperature testing device, including bracket, the bracket includes horizontal frame, left vertical frame, inclined frame and right vertical frame; The left end of the horizontal frame is connected to the top end of the left vertical frame, the right end is connected to the left end of the inclined frame, and the right end of the inclined frame is connected to the top end of the right vertical frame;The top surface of the horizontal frame is provided with a steel plate, and the upper surface of the steel plate is provided with a thermocouple A at the center position; The left side of the left vertical frame is provided with a left pressing frame that can move left and right, the right side of the right vertical frame is provided with a right pressing frame that can move left and right, and the upper side of the horizontal frame and the inclined frame is provided with a top pressing frame and an inclined pressing frame that can move up and down, and the top pressing frame and the inclined pressing frame are connected as a whole; The inclined pressing frame is provided with an AI image recognition sensor A for monitoring the inclined part of the fire blanket sample, the top pressing frame is provided with an AI image recognition sensor B for monitoring the horizontal part of the fire blanket sample, and the left pressing frame is provided with an AI image recognition sensor C for monitoring the vertical part of the fire blanket sample; The inclined square, square and left vertical square are respectively provided with burners A, B and C, the fire ports of the burners A, B and C are perpendicular to the surface of the fire blanket sample and are equidistant, and a thermocouple B is arranged between the fire ports and the fire blanket sample.
[0006] Further, it further comprises torque servo electric cylinder A, torque servo electric cylinder B, torque servo electric cylinder C and horizontal cantilever plate. The left middle part of the left holding frame is welded with a connecting plate C, the right surface of the connecting plate C is installed with the AI image recognition sensor C through bolts, the middle left part of the connecting plate C23 is fixed with a flange plate C through bolts, the torque servo electric cylinder C is fixed on the ground through a fixing frame C, and the telescopic end C of the torque servo electric cylinder C is connected with the flange plate C. The right middle part of the right holding frame is horizontally welded with a connecting plate A, the middle right part of the connecting plate A is fixed with a flange plate A through bolts, the torque servo electric cylinder A is fixed on the ground through a fixing frame A, and the telescopic end A of the torque servo electric cylinder A is connected with the flange plate A. The top surface of the top holding frame is welded with a connecting plate B, the lower surface of the connecting plate B is installed with the AI image recognition sensor B through bolts, and the right side of the inclined holding frame is installed with the AI image recognition sensor A through bolts; the upper surface of the connecting plate B is fixed with a flange plate B through bolts. The rear end of the horizontal cantilever plate is fixed on the ground through a fixing frame B, the torque servo electric cylinder B is fixed on the lower surface of the horizontal cantilever plate through bolts, and the telescopic end B of the torque servo electric cylinder B is connected with the flange plate B.
[0007] Further, the upper surface of the horizontal cantilever plate is fixed with a barrel base through bolts, a container barrel A is arranged on the barrel base, the lowest point of the container barrel A is communicated with a drain pipe, and an electric control liquid flow valve is arranged on the drain pipe.
[0008] Further, the outer wall of the container barrel A is wrapped with a constant temperature heating tape A, and a temperature sensor A for monitoring the water temperature in the container barrel A is arranged on the top of the container barrel A.
[0009] Further, it further includes a propane gas cylinder, the propane gas cylinder is provided with a pressure sensor and a manual switch valve, an electric control gas flow valve D and a one-way valve are arranged at the propane gas pipeline outlet of the manual switch valve, the propane gas pipeline outlet of the one-way valve is connected with a flexible gas hose, the other end of the flexible gas hose is connected with a rigid main pipe, the other end of the main pipe is connected with a four-way joint, the four-way joint is connected with the inlet ends of the electric control gas flow valve A, the electric control gas flow valve B and the electric control gas flow valve C through three branch pipes, the outlet ends of the electric control gas flow valve A, the electric control gas flow valve B and the electric control gas flow valve C are connected with the burners A, B and C respectively, and the burners A, B and C are all provided with ignition needles.
[0010] Further, it further includes an electronic platform scale placed on the ground, a container barrel B is placed on the electronic platform scale, the container barrel B is wrapped with a constant temperature heat tracing belt B, and the container barrel B is provided with a temperature sensor B for detecting the water temperature in the container barrel B; and the propane gas cylinder is placed in the container barrel B.
[0011] Further, the steel plate is a common steel plate with a thickness of 0.8-1 mm, and the size of each square frame of the bracket is 500mm*500mm.
[0012] A testing method of the fireproof blanket thermal resistance temperature testing device for electric vehicles, which adopts the fireproof blanket thermal resistance temperature testing device for electric vehicles to test the thermal resistance temperature of the fireproof blanket, and comprises the following steps: S01, covering the fireproof blanket sample on the left vertical square frame, the steel plate, the inclined square frame and the right vertical square frame on the bracket, and making the two ends of the length direction of the fireproof blanket sample contact the ground; S02, weighing the weights of the propane gas cylinder and the container barrel B respectively by using the electronic platform scale, placing the propane gas cylinder in the container barrel B, and recording the respective weights of the propane gas cylinder and the container barrel B and the total weight data of the two; S03, controlling the torque servo electric cylinder B to work, and making the extension end B of the torque servo electric cylinder B elongate, and making the top pressing frame and the inclined pressing frame move downward, and stopping the work of the torque servo electric cylinder B when the top pressing frame and the inclined pressing frame contact the fireproof blanket sample and the pressing torque value reaches a set value; Meanwhile, controlling the torque servo electric cylinder C and the torque servo electric cylinder A to work, and making the extension end C and the extension end A elongate, and stopping the work of the torque servo electric cylinder C and the torque servo electric cylinder A when the left pressing frame and the right pressing frame contact the fireproof blanket sample and the pressing torque value reaches a set value; S04, controlling the burners A, B and C to spray flames, and starting timing, and monitoring the temperature values in real time by using the thermocouples A and B; controlling the respective flow changes of the electric control gas flow valves A, B and C according to the temperature values provided by the thermocouples A and B, and meeting the test temperature process control; S05, when the test is carried out for a period of time, the electric control liquid flow valve is controlled to open, the drain pipe flows through 250ml of water, and then the electric control liquid flow valve is closed, 250ml of water falls on the surface of the fire blanket sample on the steel plate, the electric control gas flow valve D is controlled to close first, and then the electric control gas flow valves A, B and C are controlled to close, the test images with recorded time of the AI image recognition sensors A, B and C are analyzed, whether the fire blanket sample has a flame exceeding 5s in the vertical, horizontal and inclined state test process, and whether there is a visible burning hole and joint damage on the surface of the fire blanket sample after the test is finished, and a judgment is made.
[0013] The beneficial effects obtained by the present application compared with the prior art are as follows: 1. The fire blanket thermal resistance temperature testing device for electric vehicles provided by the present application can clamp the fire blanket sample, and the surface of the fire blanket sample is sprayed by the burner, so that the testing is facilitated. The fire blanket thermal resistance temperature testing device testing method for electric vehicles provided by the present application solves the problem that the fire extinguishing effect of the fire blanket cannot be measured, judges whether the fire blanket sample has a flame exceeding 5s in the vertical, horizontal and inclined state test process, and whether there is a visible burning hole and joint damage on the surface of the fire blanket sample after the test is finished, and makes a judgment, so that the fire extinguishing effect of the fire blanket can be measured. 2. The present application fills the blank of the fire blanket thermal resistance temperature testing device and testing method for electric vehicles, the testing process is automated, human interference is avoided, the testing quality and efficiency are high, and there is potential social benefit for ensuring the quality of the fire blanket for electric vehicles. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a front view of the fire blanket thermal resistance temperature testing device for electric vehicles described in the present application; Figure 2 is a top view of Figure 1 ; Figure 3 is a side view of Figure 1 ; Figure 4 is a state diagram of each pressing frame away from the fire blanket; Figure 5 is an A-A sectional view of Figure 4 ; Figure 6 is an enlarged view of I of Figure 5 ; Figure 7 is an electric control principle diagram; Figure 8 is a test temperature process control diagram; In the figure: 1 ground, 2 fixed frame A, 3 torque servo electric cylinder A, 4 telescopic end A, 5 flange plate A, 6 connecting plate A, 7 right pressure holding frame, 8 fire blanket sample, 9 bracket, 10 inclined square frame, 11 support, 12 burner A, 13 electric gas flow valve A, 14 branch pipe, 15 fixed frame B, 16 reinforcing rib, 17 electric gas flow valve B, 18 four-way joint, 19 burner B, 20 electric gas flow valve C, 21 burner C, 22 left pressure holding frame, 23 connecting plate C, 24 flange plate C, 25 telescopic end C, 26 fixed frame C, 27 display PLC controller, 28 torque servo electric cylinder C, 29 AI image recognition sensor C, 30 ignition needle, 31 vertical square frame, 32 horizontal square frame, 33 top surface pressure holding frame, 34 AI image recognition sensor B, 35 connecting plate B, 36 flange plate B, 37 telescopic end B, 38 torque servo electric cylinder B, 39 drain pipe, 40 electric liquid flow valve, 41 constant temperature heat tracing tape A, 42 temperature sensor A, 43 container barrel A, 44 barrel base, 45 horizontal cantilever plate, 46 inclined pressure holding frame, 47 AI image recognition sensor A, 48 vertical frame, 49 main pipe, 50 check valve, 51 electric gas flow valve D, 52 manual on-off valve, 53 propane gas cylinder, 54 water, 55 temperature sensor B, 56 pressure sensor, 57 container barrel B, 58 constant temperature heat tracing tape B, 59 electronic platform scale, 60 flexible gas hose, 61 ordinary steel plate, 62 thermocouple A, 63 thermocouple B. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0016] In the description of the application, it should be understood that the terms "front", "back", "up", "down", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. The application will be further described below in combination with the drawings and embodiments.
[0017] As Figures 1-6As shown, the fireproof blanket thermal resistance temperature testing device for electric vehicles described in the embodiment mainly includes a bracket 9, a torque servo electric cylinder A3, a torque servo electric cylinder B38, a torque servo electric cylinder C28, a burner A12, a burner B19, a burner C21, etc. The bracket 9 includes a horizontal square frame 32, a left vertical square frame 31, an inclined square frame 10, and a right vertical square frame 48. The left end of the horizontal square frame is connected to the top end of the left vertical square frame, and the right end is connected to the left end of the inclined square frame. The right end of the inclined square frame is connected to the top end of the right vertical square frame.
[0018] The specific structure of the device is as follows: the bracket 9 is fixed on the ground 1 by anchor bolts. The bracket 9 is made of heat-resistant stainless steel angle. The highest part of the bracket 9 is the horizontal square frame 32. A 0.8 mm thick steel plate 61 is placed on the top surface of the horizontal square frame 32. The steel plate 61 can be a common steel plate. A thermocouple A62 is placed on the center of the upper surface of the 0.8 mm thick common steel plate 61. The left side of the horizontal square frame 32 is the left vertical square frame 31. The right side of the horizontal square frame 32 is the inclined square frame 10. The right side of the inclined square frame 10 is the right vertical square frame 48. The square frames on the bracket 9 are made of metal strip welding machines, and the size is 500 mm x 500 mm.
[0019] In the embodiment, the size of the fireproof blanket sample 8 is 900 mm ± 100 mm in width and 2500 mm ± 100 mm in length. The fireproof blanket sample 8 is cut from a fireproof blanket. The fireproof blanket sample 8 covers the left vertical square frame 31, the horizontal square frame 32, and the inclined square frame 10 on the bracket 9. The lengthwise ends of the fireproof blanket sample 8 contact the ground 1.
[0020] A left pressing frame 22 is arranged on the left side of the left vertical square frame 31. A connecting plate C23 is welded to the left side of the middle part of the left pressing frame 22. An AI image recognition sensor C29 is bolted to the right surface of the connecting plate C23. The AI image recognition sensor C29 monitors the vertical part of the fireproof blanket sample 8. A flange plate C24 is fixed on the extension end C25 of the torque servo electric cylinder C28 by bolting to the middle left side of the connecting plate C23. The torque servo electric cylinder C28 is bolted to a fixed frame C26. The fixed frame C26 is fixed on the ground 1 by anchor bolts. The left pressing frame 22 can be controlled to move left and right by the torque servo electric cylinder C28.
[0021] A right pressing frame 7 is arranged on the right side of the right vertical square frame 48 of the bracket 9. A connecting plate A6 is horizontally welded to the middle part of the right side of the right pressing frame 7. A flange plate A5 is fixed on the extension end A4 of the torque servo electric cylinder A3 by bolting to the middle right side of the connecting plate A6. The torque servo electric cylinder A3 is bolted to a fixed frame A2. The fixed frame A2 is fixed on the ground 1 by anchor bolts.
[0022] The top surface pressing frame 33 and the inclined pressing frame 46 are integrally structured, a connecting plate B35 is welded on the top surface of the top surface pressing frame 33, an AI image recognition sensor B34 is bolted on the lower surface of the connecting plate B35, the AI image recognition sensor B34 monitors the horizontal part of the fire blanket sample 8, an AI image recognition sensor A47 is bolted on the right side of the inclined pressing frame 46, the AI image recognition sensor A47 monitors the inclined part of the fire blanket sample 8. A flange plate B36 is fixed on the middle part of the upper surface of the connecting plate B35 by bolting, the flange plate B36 is installed on the telescopic end B37 of the torque servo electric cylinder B38, the torque servo electric cylinder B38 is fixed on the lower surface of the horizontal cantilever plate 45 by bolting. The horizontal cantilever plate 45 is welded on the fixed frame B15, the fixed frame B15 is welded with the reinforcing rib 16, and the fixed frame B15 is fixed on the ground 1 by anchor bolts.
[0023] A barrel base 44 is fixed on the upper surface of the horizontal cantilever plate 45 by bolting, a container barrel A43 is installed on the barrel base 44, a water pipe 39 is installed at the lowest point of the inner bottom surface of the container barrel A43, and an electric control liquid flow valve 40 is arranged on the water pipe 39. The container barrel A43 is wrapped with a constant temperature heating belt A41, the constant temperature heating belt A41 is customized to have similar PTC material characteristics, and can maintain the temperature at (20±5)℃. A temperature sensor A42 is installed on the top of the container barrel A43, and is used to detect the water temperature in the container barrel A43.
[0024] The burner A12, the burner B19 and the burner C21 are respectively installed on the inclined square block, the horizontal square block and the left vertical block, and the jet ports of the burners A, B and C are perpendicular to the surface of the fire blanket sample and equidistant. Specifically, an electronic platform scale 59 is also placed on the ground 1, a container barrel B57 is placed on the electronic platform scale 59, and a constant temperature heating belt B58 is wrapped outside the container barrel B57. The constant temperature heating belt B58 is customized to have similar PTC material characteristics and can maintain the temperature at (25±3) °C. A temperature sensor B55 is arranged on the container barrel B57, and the temperature sensor B55 is used to detect the water temperature in the container barrel B57. A propane gas cylinder 53 is placed in the container barrel B57, and a pressure sensor 56 and a manual on-off valve 52 are arranged on the propane gas cylinder 53. An electrically controlled gas flow valve D51 and a one-way valve 50 are arranged at the propane gas pipeline outlet of the manual on-off valve 52. A flexible gas hose 60 is connected to the propane gas pipeline outlet of the one-way valve 50, and the other end of the flexible gas hose 60 is connected to a rigid main pipe 49. The other end of the main pipe 49 is connected to a four-way joint 18. The four-way joint 18 is connected to the inlet ends of the electrically controlled gas flow valves A13, B17 and C20 through three branch pipes 14, respectively. The outlet ends of the electrically controlled gas flow valves A13, B17 and C20 are connected to the burners A12, B19 and C21, respectively. An ignition needle 30 is arranged on each burner. The center line of the jet port of each burner is perpendicular to the surface of the fire blanket 8 and is (200±5) mm away from the surface of the fire blanket 8. A thermocouple B63 is arranged between each jet port and the fire blanket sample. The thermocouple B63 needs to be fixedly installed on a bracket 9, and the temperature sensing end of the thermocouple B63 is (10±2) mm away from the surface of the fire blanket 8.
[0025] As shown in Figure 7 In order to realize automatic control, the electrically controlled wires of the torque servo electric cylinders A3, B38 and C28, the electrically controlled gas flow valves A13, B17 and C20, the electrically controlled gas flow valve D51, the electrically controlled liquid flow valve 40, the AI image recognition sensors A47, B34 and C29, the constant temperature heating belts A41 and B58, the temperature sensors A42 and B55, the pressure sensor 56, the electronic platform scale 59, the ignition needle 30, the thermocouples A62 and B63 are connected to the display PLC controller in a wired or wireless manner. The display PLC controller is inputted with a control program and image analysis software.
[0026] The fire blanket hot resistance temperature testing device for electric vehicles is used to test the fire blanket hot resistance temperature, and the embodiment also discloses a testing method of the fire blanket hot resistance temperature testing device for electric vehicles. Preparation before test: test environment temperature (20 ± 10) ℃, relative humidity (60 ± 10) %. Cut down the fireproof blanket sample 8 with the size of (900 ± 100) mm in width and (2500 ± 100) mm in length on the fireproof blanket for electric vehicle, and place it in the test environment for 24 h. Place the ordinary steel plate 61 with the thickness of 0.8 mm, length and width of 500 mm respectively on the horizontal frame 32, and place the sensing end of thermocouple A 62 at the center position of the ordinary steel plate 61.
[0027] The test device and test method for testing the thermal resistance temperature of the fireproof blanket for electric vehicle according to the embodiment specifically include the following steps: S01, cover the fireproof blanket sample 8 after standing for 24 h on the vertical frame 31, the ordinary steel plate 61 and the inclined frame 10 on the bracket 9, and make the length direction of the fireproof blanket sample 8 contact the ground 1, as shown in the accompanying drawings. Figure 4 S02, weigh the weight of the propane gas cylinder 53 and the container barrel B 57 respectively by using the electronic scale 59, wherein the weight of the propane gas cylinder 53 includes the one-way valve 50, the electrically controlled gas flow valve D 51, the hand-operated switch valve 52 and the pressure sensor 56 thereon, and the weight of the container barrel B 57 includes the water 54, the temperature sensor B 55 and the constant temperature heating belt B 58 thereon. Place the propane gas cylinder 53 into the container barrel B 57, connect the outlet of the one-way valve 50 of the propane gas cylinder 53 with the flexible gas hose 60 as shown in the accompanying drawings, and immerse the propane gas cylinder 53 in the water 54 to a depth of about two-thirds of the height of the bottle body of the propane gas cylinder 53. The remaining gas in the propane gas cylinder 53 at the end of the test is not less than 10% of the capacity of the bottle. The respective weight of the propane gas cylinder 53 and the container barrel B 57 and the total weight of both are transmitted by the electronic scale 59 to the display PLC controller 27. Figure 3 S03, open the hand-operated switch valve 52 on the propane gas cylinder 53, and press the test start button in the display PLC controller 27, so that each electrically controlled component enters the working state. The display PLC controller 27 controls the constant temperature heating belt A 41 and the constant temperature heating belt B 58 to work according to the temperature values provided by the temperature sensor A 42 and the temperature sensor B 55 according to the programming. Figure 1 Figure 4 When the temperature value provided by temperature sensor A 42 in real time is in the range of (20±5)℃ and the temperature value provided by temperature sensor B 55 in real time is in the range of (25±3)℃, the display PLC controller 27 controls the torque servo electric cylinder B 38 to work, the telescopic end B 37 is elongated, the top surface pressing frame 33 and the inclined pressing frame 46 are lowered, and when the fireproof blanket sample 8 is contacted and the pressing torque value reaches the programmed set value, the display PLC controller 27 controls the torque servo electric cylinder B 38 to stop working. The display PLC controller 27 controls the torque servo electric cylinders C 28 and A 3 to work at the same time, and the telescopic end C 25 and the telescopic end A 4 are elongated. When the left pressing frame 22 and the right pressing frame 7 are respectively contacted to the fireproof blanket sample 8 and the pressing torque value reaches the programmed set value, the display PLC controller 27 controls the torque servo electric cylinders C 28 and A 3 to stop working. S04, control the burner A, the burner B and the burner C to spray out the flame, and start timing, and monitor the temperature value in real time through the thermocouple A and the thermocouple B; control the respective flow changes of the electrically controlled gas flow valve A, the electrically controlled gas flow valve B and the electrically controlled gas flow valve C according to the temperature values provided by the thermocouple A and the thermocouple B, and meet the test temperature process control; As shown in Figure 8 the display PLC controller 27 controls the electrically controlled gas flow valve D 51 to open to the programmed set flow, the display PLC controller 27 controls the ignition needle 30 on the burner A 12 and the burner B 19 and the burner C 21 to strike fire, and then controls the electrically controlled gas flow valve A 13, the electrically controlled gas flow valve B 17 and the electrically controlled gas flow valve C 20 to open to the programmed set flow, the burner A 12, the burner B 19 and the burner C 21 spray out the flame, and the display PLC controller 27 starts timing. The thermocouple A 62 and the thermocouple B 63 transmit the temperature values monitored in real time to the display PLC controller 27, and the display PLC controller 27 controls the respective flow changes of the electrically controlled gas flow valve A 13, the electrically controlled gas flow valve B 17 and the electrically controlled gas flow valve C 20 according to the temperature values provided by the thermocouple A 62 and the thermocouple B 63 and according to the programming, and meets the test temperature process control; S05, when the test is carried out for a period of time, control the electrically controlled liquid flow valve to be opened, the electrically controlled liquid flow valve is closed after 250ml of water flows through the drain pipe, 250ml of water falls on the surface of the fireproof blanket sample on the steel plate, the electrically controlled gas flow valve D is controlled to be closed, and then the electrically controlled gas flow valve A, the electrically controlled gas flow valve B and the electrically controlled gas flow valve C are controlled to be closed, the test images with recorded time of the AI image recognition sensor A, the AI image recognition sensor B and the AI image recognition sensor C are analyzed, whether there is flame exceeding 5s in the test process of the fireproof blanket sample in the vertical, horizontal and inclined states is judged, and whether there is a visible burning hole and joint damage on the surface of the fireproof blanket sample after the test is ended is determined.
[0028] S05、The test is carried out to 23 min, and the PLC controller 27 is shown to control the opening of the electrically controlled liquid flow valve 40. After the drain pipe 39 flows through 250 ml of water at (20±5) ℃, the electrically controlled liquid flow valve 40 is closed. 250 ml of water falls on the surface of the fire blanket sample 8 on the horizontal steel plate 61, and the PLC controller 27 is shown to control the closing of the electrically controlled gas flow valve D51, and then control the closing of the electrically controlled gas flow valve A13, the electrically controlled gas flow valve B17 and the electrically controlled gas flow valve C20. The PLC controller 27 is shown to analyze the test images of the AI image recognition sensor A47, the AI image recognition sensor B34 and the AI image recognition sensor C29 with recorded time, to judge whether there is a flame exceeding 5 s in the test process of the fire blanket sample 8 in the vertical, horizontal and inclined states, and whether there is a visible burning hole and joint damage on the surface of the fire blanket sample 8 after the test, and to make a judgment. The PLC controller 27 is shown to calculate whether the propane gas consumption is within the range of (6700±100) g / h according to the data change value of the electronic platform scale 59 before and after the test.
[0029] The above device and test method fill the blank of the heat resistance temperature test device and test method for the fire blanket for electric vehicles. The test process is automated, human interference is avoided, the test quality and efficiency are high, and there is potential social benefit for ensuring the quality of the fire blanket for electric vehicles.
Claims
1. A thermal resistance temperature test device for a fire blanket for electric vehicles, characterized in that: comprising a bracket, the bracket comprising a horizontal frame, a left vertical frame, an inclined frame, and a right vertical frame; The left end of the horizontal box is connected to the top of the left vertical box, the right end is connected to the left end of the inclined box, and the right end of the inclined box is connected to the top of the right vertical box; a steel plate is provided on the top surface of the horizontal box, and a thermocouple A is provided at the center of the upper surface of the steel plate; A left holding frame capable of relatively moving left and right is provided on the left side of the left vertical frame, a right holding frame capable of relatively moving left and right is provided on the right side of the right vertical frame, and a top holding frame and an inclined holding frame capable of moving up and down are provided above the horizontal frame and the inclined frame, and the top holding frame and the inclined holding frame are connected as one body; The inclined holding frame is provided with an AI image recognition sensor A for monitoring the inclined portion of the fire blanket sample, the top holding frame is provided with an AI image recognition sensor B for monitoring the horizontal portion of the fire blanket sample, and the left holding frame is provided with an AI image recognition sensor C for monitoring the vertical portion of the fire blanket sample; The inclined box, horizontal box and left vertical box are respectively provided with burners A, burner B and burner C. The flame nozzles of burners A, burner B and burner C are perpendicular to the surface of the fire blanket sample and are equidistant. A thermocouple B is provided between the flame nozzle and the fire blanket sample.
2. The thermal resistance temperature test device for fire blanket for electric vehicles according to claim 1, characterized in that: It also includes a torque servo electric cylinder A, a torque servo electric cylinder B, a torque servo electric cylinder C and a horizontal cantilever plate; A connecting plate C is welded to the middle of the left side of the left holding frame, the AI image recognition sensor C is mounted on the right surface of the connecting plate C by bolts, the left side of the middle of the connecting plate C is fixedly connected to the flange C by bolts, the torque servo electric cylinder C is fixed to the ground by a fixing frame C, and the telescopic end C of the torque servo electric cylinder C is connected to the flange C; A connecting plate A is horizontally welded to the middle of the right side of the right holding frame, and a flange A is fixedly connected to the right side of the middle of the connecting plate A by bolts. The torque servo electric cylinder A is fixed to the ground by a fixing frame A, and the telescopic end A of the torque servo electric cylinder A is connected to the flange A; A connecting plate B is welded to the top surface of the top pressure holding frame, and the AI image recognition sensor B is mounted on the lower surface of the connecting plate B by bolts. The AI image recognition sensor A is mounted on the right side of the inclined pressure holding frame by bolts. A flange B is fixed to the middle of the upper surface of the connecting plate B by bolts. The rear end of the horizontal cantilever plate is fixed to the ground via a fixing frame B, the torque servo electric cylinder B is fixed to the lower surface of the horizontal cantilever plate via bolts, and the telescopic end B of the torque servo electric cylinder B is connected to the flange B.
3. The thermal resistance temperature test device for a fire blanket for electric vehicles according to claim 2, characterized in that: A barrel base is fixed to the upper surface of the horizontal cantilever plate by bolts, and a container barrel A is mounted on the barrel base. The lowest point of the container barrel A is connected to a drain pipe, and an electrically controlled liquid flow valve is provided on the drain pipe.
4. The thermal resistance temperature test device for a fire blanket for electric vehicles according to claim 3, characterized in that: The outer wall of the container barrel A is wrapped with a constant temperature heating belt A, and the top of the container barrel A is equipped with a temperature sensor A for monitoring the water temperature in the container barrel A.
5. The thermal resistance temperature testing device for a fire blanket for electric vehicles according to claim 3, characterized in that: It also includes a propane gas cylinder, which is equipped with a pressure sensor and a manual switch valve. An electric-controlled gas flow valve D and a one-way valve are installed at the propane gas pipeline outlet of the manual switch valve. The propane gas pipeline outlet of the one-way valve is connected to a flexible gas hose, the other end of the flexible gas hose is connected to a rigid main pipe, the other end of the main pipe is connected to a four-way joint, the four-way joint is connected to the inlet ends of the electric-controlled gas flow valve A, the electric-controlled gas flow valve B and the electric-controlled gas flow valve C through three branches, the outlet ends of the electric-controlled gas flow valve A, the electric-controlled gas flow valve B and the electric-controlled gas flow valve C are connected to burners A, burner B and burner C respectively, and burner A, burner B and burner C are all provided with ignition needles.
6. The thermal resistance temperature testing device for a fire blanket for electric vehicles according to claim 5, characterized in that: It also includes an electronic scale placed on the ground, on which a container barrel B is placed. The container barrel B is wrapped with a constant temperature heating belt B, and the container barrel B is provided with a temperature sensor B for detecting the water temperature in the container barrel B; the propane gas cylinder is placed in the container barrel B.
7. The thermal resistance temperature test device for a fire blanket for an electric vehicle according to any one of claims 1 to 6, characterized in that: The steel plate is an ordinary steel plate with a thickness of 0.8-1 mm; the size of each frame of the bracket is 500 mm×500 mm.
8. A test method for a thermal resistance temperature test device of a fire blanket for electric vehicles, characterized in that: The thermal resistance temperature test device for a fire blanket for an electric vehicle according to claim 6 is used to perform a thermal resistance temperature test on a fire blanket, comprising the following steps: S01. Cover the fire blanket sample on the left vertical frame, steel plate, inclined frame, and right vertical frame on the bracket, so that both ends of the fire blanket sample in the length direction touch the ground; S02. Weigh the propane cylinder and container barrel B separately using an electronic scale, place the propane cylinder into container barrel B, and record the weight of the propane cylinder and container barrel B, as well as their combined weight. S03, the control torque servo electric cylinder B works, its telescopic end B extends, the top surface holding frame and the inclined holding frame move downward, and when it contacts the fire blanket sample and the holding torque value reaches the set value, the control torque servo electric cylinder B stops working; At the same time, the torque servo electric cylinder C and the torque servo electric cylinder A are controlled to work, so that the telescopic ends C and A are extended. When the left holding frame and the right holding frame respectively contact the fire blanket sample and the holding torque value reaches the set value, the torque servo electric cylinder C and the torque servo electric cylinder A are controlled to stop working; S04. Control burners A, B, and C to emit flames and start timing. Monitor the temperature values in real time through thermocouples A and B. Control the flow rates of electronically controlled gas flow valves A, B, and C based on the temperature values provided by thermocouples A and B, and meet the test temperature process control requirements. S05. When the test has been going on for a period of time, the electronically controlled liquid flow valve is controlled to open, and after 250 ml of water flows through the drain pipe, the electronically controlled liquid flow valve is closed, and 250 ml of water falls onto the surface of the fire blanket sample on the steel plate. The electronically controlled gas flow valve D is controlled to close first, and then the electronically controlled gas flow valves A, B and C are controlled to close. The test images with recorded time from the AI image recognition sensor A, B and C are analyzed to determine whether there is a flame of more than 5 seconds during the vertical, horizontal and inclined state tests of the fire blanket sample, and whether there are visible burn holes and seam damage on its surface after the test, and make a judgment.