A fiber rope flame retardant tester and test method thereof

Abstract

The present invention proposes a fiber rope flame retardant tester, comprising a first frame, a second frame and a lifting platform, wherein the first frame and the second frame are symmetrically fixedly connected to the front and rear sides of a base plate, respectively, the bottom of the lifting platform is connected to a lifting device, the bottom end of the lifting device is provided with a roller, and the roller is installed in a groove on the base plate; the right side of the base plate is connected to a flamethrower support seat, the flamethrower support seat is fixedly connected to a flamethrower barrel, and a horizontally arranged flame nozzle is provided at the end of the flamethrower barrel; a crossbeam is provided at the middle position of the top of the first frame and the second frame, a rope clamp is provided in the middle of the crossbeam, and the flame nozzle is arranged close to the longitudinal section of the crossbeam. The present invention has a simple structure, convenient operation, high degree of automation, intuitive and accurate data, and strong versatility, and provides data support for ensuring the personal safety of escape and rescue personnel under high temperature conditions.

Description

Technical Field

[0001] The invention relates to a fiber rope flame retardancy tester and a testing method thereof, belonging to the field of fiber rope performance parameter testing. Background Art

[0002] Low-elongation sandwich ropes are used in aerial work, fire rescue, military rappelling, outdoor camping, cave exploration, special training and other fields due to their lightness, wear resistance and high strength. Low-elongation sandwich ropes are generally designed to be as elastic as possible, and they can hardly absorb impact force. Their elongation performance is much lower than that of dynamic ropes, and the static elongation is usually only about 3-5%.

[0003] Fire escape rope is one of the important tools for fire escape, and is widely used in high-rise buildings. When evacuating from a fire, if there is no way to escape, you can use the fire escape rope to escape quickly from the window.

[0004] Fire safety rope refers to the rope used by fire brigades only to carry people during fire fighting, disaster relief or daily training. It adopts a sandwich rope structure, with the main load-bearing part being the rope core, which is made of continuous chemical fiber, and the rope skin plays a protective role. As the most important emergency rescue equipment since the expansion of the fire brigade's functions, the fire safety rope has undergone decades of development and has developed from a single ordinary rescue rope to a rescue rope series with a wide variety of materials and types, providing a solid guarantee for the safety of rescuers themselves and the lives of trapped people, and is known as the "second life".

[0005] For the above low-elongation core ropes, fire escape ropes and fire safety ropes, people are currently concerned about their diameter, linear density, melting point (melting point of the material ≥ 195℃), breaking strength, static elongation and other mechanical performance indicators, but often ignore the time that fiber ropes can withstand breaking under high temperature conditions. Low-elongation core ropes, fire escape ropes and fire safety ropes are used in fire rescue and fire escape. They are in high temperature conditions. Polyester, nylon, polypropylene, aramid, and ultra-high molecular weight polyethylene fibers can all be used as materials for fiber ropes. These ropes made of different materials are under 200℃, 300℃, 350℃, 400℃, 500℃, 600℃ or even 700℃. How long will it take for the rope to break when carrying normal human weight (80kg or 100kg) and the corresponding testing equipment are very lacking. At present, the domestic testing instrument system for the flame retardant and high temperature resistance of fiber ropes under a certain force has not been established, and there is no flame retardant test method for fiber ropes, let alone corresponding testing instruments and equipment.

[0006] Therefore, in order to provide data support for the personal safety of escapees and lifeguards under high temperature conditions, it is very necessary to test the flame retardant and high temperature resistance of fiber ropes under the weight of the human body, and establish and improve corresponding test methods and corresponding testing instruments. This can simulate the time it takes for ropes to break when carrying escapees or lifeguards under fire or high temperature conditions, thereby ensuring the personal safety of escapees and lifeguards under high temperature conditions. Summary of the invention

[0007] In order to solve the above-mentioned deficiencies of the prior art, the present invention proposes a fiber rope flame retardant tester and a test method thereof. The specific technical scheme is as follows:

[0008] A fiber rope flame retardant tester comprises a first frame, a second frame and a lifting platform, wherein the first frame and the second frame are symmetrically fixedly connected to the front side and the rear side of a base plate, respectively; the four corners of the bottom of the lifting platform are fixedly connected to a lifting device, the bottom end of the lifting device is provided with a roller, and the roller is installed in two parallel grooves provided on the base plate; the right side of the base plate is fixedly connected to a flame spray gun support seat, which is located between the two parallel grooves; the flame spray gun support seat is fixedly connected to a flame spray gun barrel, and the end of the flame spray gun barrel is provided with a horizontally arranged flame spray head; a cross beam is provided at the middle position of the top of the first frame and the second frame, the two ends of the cross beam are respectively fixedly connected to the inner sides of the first frame and the second frame, a rope clamp is provided in the middle of the cross beam, and the flame spray head is arranged close to the longitudinal section of the cross beam.

[0009] Preferably, a first weight and a second weight are placed on the lifting platform, the weights of the first weight and the second weight are 80±0.1kg and 100±0.1kg respectively, the first weight and the second weight are both cylindrical and have hooks on the top and bottom, and a fiber rope sample is placed between the hook on the top of the first weight and the rope clamp.

[0010] Preferably, a through hole is provided in the middle of the crossbeam which passes through from top to bottom, a fire isolation board with racks on both sides is provided in the through hole, a temperature sensor is provided on the fire isolation board, two motors are installed on the side of the crossbeam, and the transmission gears of the motors are meshed with the racks; a weighing sensor is provided on the side of the middle of the crossbeam close to the lifting platform, and the weighing sensor is fixedly connected to the rope clamp.

[0011] Furthermore, limit blocks are respectively provided on both sides of the upper and lower ends of the fire isolation board.

[0012] Furthermore, a control box is installed on the front of the first frame, and an intelligent digital display regulator is installed on the control box. The intelligent digital display regulator is electrically connected to a PLC controller installed in the control box, and the PLC controller is electrically connected to a temperature sensor located on the fire isolation board, a flow regulating valve located on the flamethrower barrel, and a weighing sensor, respectively. The intelligent digital display regulator is used to set a test temperature value, display the temperature corresponding to the temperature sensor signal, and can adjust the opening of the flow regulating valve through the PLC controller to stabilize it at the set test temperature value.

[0013] Furthermore, the control box is provided with a motor control button and a lifting device control button, the lifting device is a cylinder, the cylinder is connected to an air pump, the air pump and the motor are electrically connected to the lifting device control button and the motor control button respectively, and the motor is also electrically connected to a PLC controller.

[0014] Preferably, the roller is provided with a pedal for fixing the roller.

[0015] Preferably, a rubber layer is laid on the lifting platform.

[0016] Furthermore, the flame retardant tester also includes a computer on which rope flame retardant test software is installed, the computer is communicatively connected to the PLC controller, the rope flame retardant test software is used to set the test temperature value and display the temperature value corresponding to the temperature sensor signal on the fire isolation board, the rope flame retardant test software sends a signal to the PLC controller according to the set test temperature value, and controls the flow regulating valve opening through the PLC controller, so that the temperature value corresponding to the temperature sensor signal is stabilized at the test temperature value, and then sends a signal to the PLC controller again to control the flow regulating valve to maintain the opening, and at the same time sends a signal to the PLC controller to start the motor, and after the fire isolation board is moved up to a set distance, the motor stops, so that the flame sprayed from the flame nozzle is directly aimed at the fiber rope sample, and the rope flame retardant test software starts timing, and when the fiber rope sample breaks, that is, the weighing sensor sends a signal to the rope flame retardant test software through the PLC controller, the rope flame retardant test software displays that the weight is 0, then stops timing, and records the corresponding temperature fracture time; after the test of multiple fiber rope samples is completed, a temperature-fracture time curve is generated, the abscissa of the curve is the test temperature, and the ordinate is the corresponding fiber rope sample fracture time.

[0017] A testing method for a fiber rope flame retardant tester comprises the following steps:

[0018] Step 1: Take a fiber rope sample with a specification of 8.5-16mm. The sample material can be polyester, nylon, or aramid. Place it in an environment with an air humidity of <10% for 24 hours, and then place it in an environment with a temperature of 20±2℃ and a humidity of 65±5% for 72 hours;

[0019] Step 2: Cut a 2000mm rope sample and heat seal both ends;

[0020] Step 3: Tie a knot at one end of the fiber rope sample and connect it to the rope clamp, and tie a knot at the other end for later use;

[0021] Step 4: Place the first weight and the second weight connected to it by a hook on the lifting platform, select the weight of the weight to match the fiber rope sample according to its specifications, connect the other end of the fiber rope sample to the first weight by a hook, move the lifting platform to the bottom of the beam, and the initial position of the lifting platform ensures that the fiber rope sample droops naturally without load;

[0022] Step 5: Start the lifting device control button to control the lifting platform to move down at a rate of 200 mm / min until the second weight is completely separated from the lifting platform;

[0023] Step 6: Turn on the flame spray gun switch so that the flame sprayed from the flame spray head is facing the temperature sensor on the fireproof board. Set the test temperature of the sample flame retardant test on the rope flame retardant test software in the computer. Adjust the opening of the flow control valve on the flame spray gun tube through the PLC controller. When the temperature sensor feedback signal to the temperature value displayed on the rope flame retardant test software reaches the test temperature, maintain the temperature unchanged. At this time, the rope flame retardant test software sends a signal to the PLC controller to control the flow control valve to maintain the opening, and at the same time sends a signal to the PLC controller to start the motor. After the fireproof board is moved up to the set distance, the motor stops, so that the flame sprayed from the flame spray head is directly aimed at the fiber rope sample, and the rope flame retardant test software starts timing;

[0024] Step 7: When the fiber rope sample breaks, the weighing sensor sends a signal to the rope flame retardant test software through the PLC controller. When the rope flame retardant test software displays the weight as 0, the timing is stopped and the breaking time of the fiber rope sample at the corresponding temperature is recorded;

[0025] Step 8: Replace the test sample with the same specification and material, repeat steps 1 to 7, set different test temperatures in step 6, test and obtain different breaking times of fiber rope samples, and make a temperature-breaking time curve based on the breaking time data of fiber rope samples corresponding to multiple different temperatures. The horizontal axis of the curve is the test temperature, and the vertical axis is the corresponding breaking time of the fiber rope sample.

[0026] The present invention has the advantages of simple structure, convenient operation, high degree of automation, intuitive and accurate data, and strong versatility. It simulates the time it takes for a rope to withstand breaking when carrying escapees or rescuers under fire or high temperature conditions, thereby providing data support for ensuring the personal safety of escapees and rescuers under high temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a front view of a fiber rope flame retardancy tester of the present invention.

[0028] Figure 2 It is a left view of a fiber rope flame retardancy tester of the present invention.

[0029] In the figure: 1. first frame; 2. second frame; 3. lifting platform; 4. bottom plate; 5. lifting device; 6. roller; 7. groove; 8. flamethrower support seat; 9. flamethrower barrel; 10. flame nozzle; 11. crossbeam; 12. rope clamp; 13. first weight; 14. second weight; 15. fiber rope sample; 16. fireproof board; 17. motor; 18. weighing sensor; 19. limit block; 20. control box; 21. intelligent digital display regulator; 22. flow control valve; 23. motor control button; 24. lifting device control button. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 and 2 As shown, a fiber rope flame retardant tester comprises a first frame 1, a second frame 2 and a lifting platform 3, wherein the first frame 1 and the second frame 2 are symmetrically fixedly connected to the front side and the rear side of the bottom plate 4, respectively, and the lifting device 5 is fixedly connected to the four corners of the bottom of the lifting platform 3, and the bottom end of the lifting device 5 is provided with a roller 6 with a diameter of 100 mm, and a pedal for fixing the roller 6 is provided thereon to control the moving distance of the lifting platform 3. The roller 6 is installed in two parallel grooves 7 provided on the bottom plate 4; the right side of the bottom plate 4 is fixedly connected to a flame spray gun support seat 8, which is located between the two parallel grooves 7, and the flame spray gun support seat 8 is fixedly connected to a flame spray gun barrel 9, and a flame spray head 10 is provided at the end of the flame spray gun barrel 9; a cross beam 11 is provided at the middle position of the top of the first frame 1 and the second frame 2, and the two ends of the cross beam 11 are respectively fixedly connected to the inner side of the first frame 1 and the second frame 2, and a rope clamp 12 is provided in the middle of the cross beam 11, and the flame spray head 10 is arranged close to the longitudinal section of the cross beam 11. The flame spray gun is fixedly mounted on the flame spray gun support seat 8. The flame spray gun is 420 mm long and weighs 320 g. The flame spray gun barrel 9 is 150 mm long and the flame nozzle 10 is 30 mm in diameter. The flame temperature can reach up to 1500° C. The test temperature is adjusted by adjusting the flame amount and the distance between the flame nozzle 10 and the fiber rope sample 15.

[0032] The lifting distance of the lifting platform 3 is up to 1000mm, and the first weight 13 and the second weight 14 are placed thereon, the weights of the first weight 13 and the second weight 14 are 80±0.1kg and 100±0.1kg respectively, the first weight 13 and the second weight 14 are both cylindrical, and hooks are arranged on the top and bottom, and the fiber rope sample 15 is placed between the hook on the top of the first weight 13 and the rope clamp 12. The first weight 13 and the second weight 14 on the lifting platform 3 can be placed individually or simultaneously according to the weight of the human body or the need for rescue.

[0033] A through hole is provided in the middle of the crossbeam 11 which passes through from top to bottom. A fire isolation board 16 with racks on both sides is provided in the through hole. A temperature sensor is provided on the fire isolation board 16. Two motors 17 are installed on the side of the crossbeam 11. The transmission gears of the motors 17 are meshed with the racks. A weighing sensor 18 is provided on the side of the middle of the crossbeam 11 close to the lifting platform 3. The weighing sensor 18 is fixedly connected to the rope clamp 12. The weighing sensor 18 is located above the rope clamp 12.

[0034] Limiting blocks 19 are respectively provided on both sides of the upper and lower ends of the fire isolation board 16 to limit the displacement of the fire isolation board 16 and prevent the fire isolation board 16 from moving out of the through hole on the beam 11.

[0035] A control box 20 is installed on the front of the first frame 1, and an intelligent digital display regulator 21 is installed on the control box 20. The intelligent digital display regulator 21 is electrically connected to a PLC controller installed in the control box 20, and the PLC controller is electrically connected to a temperature sensor located on the fire isolation board 16, a flow regulating valve 22 located on the flamethrower barrel 9, and a weighing sensor 18, respectively. The intelligent digital display regulator 21 is used to set a test temperature value, display the temperature corresponding to the temperature sensor signal, and can adjust the opening of the flow regulating valve 22 through the PLC controller to stabilize it at the set test temperature value.

[0036] The control box 20 is provided with a motor control button 23 and a lifting device control button 24. The lifting device 5 is a cylinder, which is connected to an air pump. The air pump and the motor 17 are electrically connected to the lifting device control button 24 and the motor control button 23 respectively. The motor 17 is also electrically connected to a PLC controller.

[0037] A rubber layer is laid on the lifting platform 3 to cushion the fall of the first weight 13 and the second weight 14 when the fiber rope sample 15 breaks under the load of the first weight 13 and the second weight 14 during the flame retardant test.

[0038] The flame retardant tester also includes a computer installed with rope flame retardant test software, the computer is connected to the PLC controller for communication, the rope flame retardant test software is used to set the test temperature value and display the temperature value corresponding to the temperature sensor signal on the fireproof board 16, the rope flame retardant test software sends a signal to the PLC controller according to the set test temperature value, and controls the opening of the flow regulating valve 22 through the PLC controller, so that the temperature value corresponding to the temperature sensor signal is stabilized at the test temperature value, and then sends a signal to the PLC controller again to control the flow regulating valve 22 to keep the opening, and at the same time sends a signal to the PLC controller to start the electric The motor 17 moves the fire isolation board 16 to the set distance, then the motor 17 stops, so that the flame sprayed by the flame nozzle 10 is directly aimed at the fiber rope sample 15, and the rope flame retardant test software starts timing. When the fiber rope sample 15 breaks, that is, the weighing sensor 18 sends a signal to the rope flame retardant test software through the PLC controller, and the rope flame retardant test software displays that the weight is 0, the timing is stopped, and the breaking time of the corresponding temperature is recorded; after the test of multiple fiber rope samples is completed, a temperature-breaking time curve, that is, a TT curve, is generated, the horizontal axis of the curve is the test temperature, and the vertical axis is the corresponding fiber rope sample The sample breaking time.

[0039] A testing method for a fiber rope flame retardant tester comprises the following steps:

[0040] Step 1: Take a fiber rope sample with a specification of 8.5-16mm. The sample material can be polyester, nylon, or aramid. Place it in an environment with an air humidity of <10% for 24 hours, and then place it in an environment with a temperature of 20±2℃ and a humidity of 65±5% for 72 hours;

[0041] Step 2: Cut a 2000mm rope sample and heat seal both ends;

[0042] Step 3: Tie a knot at one end of the fiber rope sample 15 and connect it to the rope clamp 12, and tie a knot at the other end for later use;

[0043] Step 4: Place the first weight 13 and the second weight 14 connected to the first weight 13 by a hook on the lifting platform 3, select the weight of the weight to match the fiber rope sample 15 according to its specifications, connect the other end of the fiber rope sample 15 to the first weight 13 by a hook, move the lifting platform 3 to below the crossbeam 11, and the initial position of the lifting platform 3 ensures that the fiber rope sample 15 droops naturally without load, and the flame nozzle 10 faces the fiber rope sample 15;

[0044] Step 5: Start the lifting device control button 24 to control the lifting platform 3 to move downward at a rate of 200 mm / min until the second weight 14 is completely separated from the lifting platform 3;

[0045] Step 6: Turn on the flame spray gun switch so that the flame sprayed from the flame spray head 10 is facing the temperature sensor on the fireproof board 16. Set the test temperature of the sample flame retardant test on the rope flame retardant test software in the computer. Adjust the opening of the flow control valve 22 on the flame spray gun tube 9 through the PLC controller. When the temperature value displayed on the rope flame retardant test software reaches the test temperature, the temperature is maintained unchanged. At this time, the rope flame retardant test software sends a signal to the PLC controller to control the flow control valve 22 to maintain the opening, and at the same time sends a signal to the PLC controller to start the motor 17. After the fireproof board 16 is moved up to the set distance, the motor 17 stops, so that the flame sprayed from the flame spray head 10 is directly aimed at the fiber rope sample 15, and the rope flame retardant test software starts timing;

[0046] Step 7: When the fiber rope sample 15 breaks, that is, the weighing sensor 18 sends a signal to the rope flame retardant test software through the PLC controller, and when the rope flame retardant test software displays the weight as 0, the timing is stopped and the breaking time of the fiber rope sample at the corresponding temperature is recorded;

[0047] Step 8: Replace the test sample with the same specification and material, repeat steps 1 to 7, set different test temperatures in step 6, test and obtain different breaking times of fiber rope samples, and make a temperature-breaking time curve based on the breaking time data of fiber rope samples corresponding to multiple different temperatures. The horizontal axis of the curve is the test temperature, and the vertical axis is the corresponding breaking time of the fiber rope sample.

[0048] The test temperature environment of the fiber rope sample 15 is 25±5℃. The fiber rope sample 15 is very close to the fire isolation board 16 during the test, and the heat loss caused by the distance between the fire isolation board 16 and the fiber rope sample 15 to the flame spray distance can be ignored. When using the rope flame retardant test software installed on the computer for testing, the intelligent temperature display regulator 21 is set to only play a display role. When using the intelligent temperature display regulator 21 for testing, it is necessary to manually control the start of the motor. The moving distance of the electric fire isolation board can still be set in advance and automatically stopped, and then the stopwatch is used to time and record the break time of the fiber rope sample 15.

[0049] The present invention has a simple structure and simulates the time it takes for a rope to withstand a break when carrying an escape or rescuer under fire or high temperature conditions, thereby providing data support for ensuring the personal safety of escape and rescue personnel under high temperature conditions. According to the simulated temperature area where the fiber rope is located, the temperature value of the test is set, and the flamethrower adjusts the amount of flame spraying according to the set temperature to reach the temperature setting value. At the same time, the fiber rope sample is timed to determine the break time displayed by the computer after the rope breaks under a certain force (selecting a human body weight of 80kg or 100kg), and the break time at the corresponding temperature is recorded. Then, rope samples of the same specification are taken, different temperature values ​​are set, and the corresponding break time is recorded. After different flame retardant tests, according to different break time data corresponding to different temperatures, the TT curve of the fiber rope flame retardant test can be displayed (where the horizontal axis is the test temperature and the vertical axis is the corresponding break time of the fiber rope sample). It is easy to operate, has a high degree of automation, intuitive and accurate data, and strong versatility.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fiber rope flame retardant tester, characterized in that: The invention comprises a first frame (1), a second frame (2) and a lifting platform (3), wherein the first frame (1) and the second frame (2) are symmetrically fixedly connected to the front side and the rear side of a bottom plate (4), respectively; the four corners of the bottom of the lifting platform (3) are fixedly connected to a lifting device (5); a roller (6) is provided at the bottom end of the lifting device (5); the roller (6) is installed in two parallel grooves (7) provided on the bottom plate (4); the right side of the bottom plate (4) is fixedly connected to a flamethrower support seat (8) located in the two parallel grooves; (7), a flamethrower tube (9) is fixedly connected to the flamethrower support seat (8), and a flame spray head (10) is arranged horizontally at the end of the flamethrower tube (9); a crossbeam (11) is arranged at the middle position of the top of the first frame (1) and the second frame (2), and the two ends of the crossbeam (11) are respectively fixedly connected to the inner side of the first frame (1) and the second frame (2), and a rope clamp (12) is arranged in the middle of the crossbeam (11), and the flame spray head (10) is arranged close to the longitudinal section of the crossbeam (11); A first weight (13) and a second weight (14) are placed on the lifting platform (3), the weights of the first weight (13) and the second weight (14) are 80±0.1kg and 100±0.1kg respectively, the first weight (13) and the second weight (14) are both cylindrical, and are provided with hooks at the top and bottom, and a fiber rope sample (15) is placed between the hook at the top of the first weight (13) and the rope clamp (12); A through hole is provided in the middle of the cross beam (11) and passes through the cross beam (11) from top to bottom. A fireproof plate (16) with racks on both sides is provided in the through hole. A temperature sensor is provided on the fireproof plate (16). Two motors (17) are installed on the side of the cross beam (11). The transmission gears of the motors (17) are meshed with the racks. A weighing sensor (18) is provided on the side of the middle of the cross beam (11) close to the lifting platform (3). The weighing sensor (18) is fixedly connected to the rope clamp (12). A control box (20) is installed on the front of the first frame (1), and an intelligent digital display regulator (21) is installed on the control box (20). The intelligent digital display regulator (21) is electrically connected to a PLC controller installed in the control box (20), and the PLC controller is electrically connected to a temperature sensor located on the fireproof board (16), a flow regulating valve (22) located on the flamethrower barrel (9), and a weighing sensor (18) respectively. The intelligent digital display regulator (21) is used to set a test temperature value, display the temperature corresponding to the temperature sensor signal, and can adjust the opening of the flow regulating valve (22) through the PLC controller to stabilize it at the set test temperature value; The flame retardant tester also includes a computer installed with rope flame retardant test software, the computer is connected to the PLC controller for communication, the rope flame retardant test software is used to set the test temperature value and display the temperature value corresponding to the temperature sensor signal on the fireproof board (16), the rope flame retardant test software sends a signal to the PLC controller according to the set test temperature value, and controls the opening of the flow control valve (22) through the PLC controller, so that the temperature value corresponding to the temperature sensor signal is stabilized at the test temperature value, and then sends a signal to the PLC controller again to control the flow control valve (22) to maintain the opening, and at the same time sends a signal to the PLC controller to start the motor (17), and after the fireproof board (16) is moved up to a set distance, the motor (17) stops, so that the flame sprayed by the flame spray head (10) is directly aimed at the fiber rope sample (15), and the rope flame retardant test software starts timing, and when the fiber rope sample (15) breaks, that is, the weighing sensor (18) sends a signal to the rope flame retardant test software through the PLC controller, the rope flame retardant test software stops timing when the weight is displayed as 0, and records the breaking time of the corresponding temperature; After testing multiple fiber rope samples, a temperature-breaking time curve can be generated, in which the abscissa is the test temperature and the ordinate is the breaking time of the corresponding fiber rope sample.

2. A fiber rope flame retardant tester according to claim 1, characterized in that: Limit blocks (19) are respectively provided on both sides of the upper and lower ends of the fire isolation board (16).

3. A fiber rope flame retardant tester according to claim 1, characterized in that: The control box (20) is provided with a motor control button (23) and a lifting device control button (24); the lifting device (5) is a cylinder, the cylinder is connected to an air pump, the air pump and the motor (17) are electrically connected to the lifting device control button (24) and the motor control button (23) respectively, and the motor (17) is also electrically connected to a PLC controller.

4. The fiber rope flame retardancy tester according to claim 1, characterized in that: The roller (6) is provided with a pedal for fixing the roller (6).

5. The fiber rope flame retardancy tester according to claim 1, characterized in that: A rubber layer is laid on the lifting platform (3).

6. A testing method of the fiber rope flame retardant tester according to any one of claims 1 to 5, characterized in that: The steps include: Step 1: Take a fiber rope sample with a specification of 8.5-16mm. The sample material can be polyester, nylon, or aramid. Place it in an environment with an air humidity of <10% for 24 hours, and then place it in an environment with a temperature of 20±2℃ and a humidity of 65±5% for 72 hours; Step 2: Cut a 2000mm rope sample and heat seal both ends; Step 3: Tie a knot at one end of the fiber rope sample (15) and connect it to the rope clamp (12), and tie a knot at the other end for later use; Step 4: Place the first weight (13) and the second weight (14) connected to the first weight (13) by a hook on the lifting platform (3), select the weight of the weight to match the fiber rope sample (15) according to its specifications, connect the other end of the fiber rope sample (15) to the first weight (13) by a hook, move the lifting platform (3) to the bottom of the crossbeam (11), and the initial position of the lifting platform (3) ensures that the fiber rope sample (15) droops naturally without load; Step 5: Activate the lifting device control button (24) to control the lifting platform (3) to move downward at a rate of 200 mm / min until the second weight (14) is completely separated from the lifting platform (3); Step 6: Turn on the flame spray gun switch so that the flame sprayed from the flame spray head (10) is directly facing the temperature sensor on the fireproof board (16), set the test temperature of the sample fireproof test on the rope fireproof test software in the computer, and adjust the opening of the flow control valve (22) on the flame spray gun tube (9) through the PLC controller. When the temperature value displayed on the rope fireproof test software via the temperature sensor feedback signal reaches the test temperature, the temperature is maintained unchanged. At this time, the rope fireproof test software sends a signal to the PLC controller to control the flow control valve (22) to maintain the opening, and at the same time sends a signal to the PLC controller to start the motor (17). After the fireproof board (16) is moved up to the set distance, the motor (17) stops, so that the flame sprayed from the flame spray head (10) is directly aimed at the fiber rope sample (15), and the rope fireproof test software starts timing; Step 7: When the fiber rope sample (15) breaks, the weighing sensor (18) sends a signal to the rope flame retardant test software through the PLC controller. When the rope flame retardant test software displays the weight as 0, the timing is stopped and the breaking time of the fiber rope sample at the corresponding temperature is recorded; Step 8: Replace the test sample with the same specification and material, repeat steps 1 to 7, set different test temperatures in step 6, test and obtain different breaking times of fiber rope samples, and make a temperature-breaking time curve based on the breaking time data of fiber rope samples corresponding to multiple different temperatures. The horizontal axis of the curve is the test temperature, and the vertical axis is the corresponding breaking time of the fiber rope sample.

Images