Single vertical combustion test device

Abstract

The utility model discloses a single vertical combustion test device. The single vertical combustion test device comprises a combustion assembly, a sample positioning mechanism and a data acquisition assembly, the combustion assembly is composed of a combustor and an air blower, the combustor is vertically arranged below the sample positioning mechanism, and the air blower is connected to the bottom of the combustor to adjust flames. The sample positioning mechanism comprises an assembling frame, a fixing frame, a lifting assembly and a turnover assembly, the lifting assembly drives the assembling frame to ascend and descend, the fixing frame is rotatably installed through an assembling pin shaft, and the turnover assembly achieves sample angle adjustment and self-locking positioning. The data acquisition assembly comprises upper and lower mounting brackets and detection equipment for respectively monitoring flame parameters and a sample combustion state. The device has the advantages of accurate flame control, flexible sample positioning, comprehensive data acquisition and the like, is suitable for testing the flame retardance of materials such as cables and plastics, and is high in detection reliability.

Description

Technical Field

[0001] This utility model relates to the field of combustion testing technology, specifically a single vertical combustion testing device. Background Technology

[0002] With the development of modern industry, especially in the fields of power, communications, and construction, the requirements for the flame retardant properties of cables and other materials are becoming increasingly stringent. Flame retardant performance testing has become an important part of material safety assessment. The single-strand vertical burning test is one of the commonly used methods for evaluating the flame retardant properties of materials. By simulating the burning behavior of materials in a vertical state, it detects key indicators such as burning rate, flame spread, and self-extinguishing properties, providing a safety basis for the practical application of materials.

[0003] Currently, existing vertical combustion testing apparatuses typically include a burner, a sample clamping mechanism, and a data acquisition system. However, these apparatuses still suffer from the following technical shortcomings in practical applications: Traditional burners often rely on manual adjustment of fuel and air flow, making it difficult to achieve precise control over flame height, temperature, and combustion time, resulting in poor repeatability of test results and affecting data reliability. Sample clamping mechanisms are mostly fixed designs, unable to adjust the sample height or tilt angle, limiting the diverse requirements of different testing standards regarding sample position and flame angle. Existing apparatuses' temperature measurement or imaging equipment is often directly exposed to high-temperature environments, making it susceptible to thermal interference or damage, and lacks real-time monitoring of the sample's back surface temperature and combustion morphology, leading to insufficient data integrity. The high temperatures generated by combustion can easily affect the normal operation of transmission components, and traditional apparatuses lack effective heat insulation design, which may lead to component aging or failure with long-term use. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a single vertical combustion test device, which has significant advantages in flame control, sample positioning, data acquisition and structural stability. It can be widely used in the flame retardant performance testing of materials such as cables, plastics and textiles, providing the industry with a high-precision and high-reliability testing method.

[0005] The technical solution adopted by this utility model to achieve the above objectives is: a single vertical combustion test device, including a combustion component and a sample positioning mechanism and a data acquisition component arranged above the combustion component.

[0006] The combustion assembly includes a burner and a blower. The burner is arranged directly below the sample positioning mechanism and in a vertical direction. The blower is assembled and connected to the bottom of the burner.

[0007] The sample positioning mechanism includes an assembly frame, a fixed frame, a lifting assembly, and a tilting assembly. The assembly frame is mounted on the lifting assembly and is driven by the lifting assembly to move vertically. The fixed frame has assembly pins fixed to both sides along its centerline. The assembly pins are rotatably mounted to the centerline of the assembly frame. The material sample for the combustion test is nested and fixed in the fixed frame. The tilting assembly includes a matching combination of a worm gear and a worm. The worm gear is coaxially fixed to one of the assembly pins.

[0008] The data acquisition component includes an upper mounting bracket, a lower mounting bracket, and multiple sets of testing devices assembled on the upper and lower mounting brackets. The upper mounting bracket is arranged directly above the sample positioning mechanism, and the lower mounting bracket is fixedly installed at the bottom of the assembly frame.

[0009] Based on the above technical solutions, in order to ensure that the components can be assembled stably and to achieve the matching combination and stable operation of the components, the following technical solutions are provided.

[0010] It also includes a housing, in which an upper assembly chamber, a combustion chamber, and a lower assembly chamber are arranged sequentially from top to bottom. The burner, assembly frame, fixing frame, and data acquisition components are all arranged in the combustion chamber. The upper mounting bracket is fixedly installed at the center of the top of the combustion chamber. A flue pipe is connected to the top of the combustion chamber. The blower is fixedly installed in the lower assembly chamber.

[0011] Based on the above technical solutions, in order to ensure that the lifting components can be stably assembled and to achieve precise adjustment of the lifting posture of the assembly frame, the following technical solutions are provided.

[0012] The lifting assembly includes a guide rod, an adjusting screw, and an adjusting motor A. The guide rod is fixedly installed at the corner position of the combustion chamber and arranged vertically. The adjusting screw is rotatably installed on both sides inside the combustion chamber. The assembly frame is slidably inserted with the guide rod, and the adjusting screw is screwed with the assembly frame. The top of each set of adjusting screws is fixedly connected to a synchronous pulley arranged in the upper assembly chamber. Each set of synchronous pulleys is powered by a synchronous belt. The adjusting motor A is fixedly installed in the upper assembly chamber, and a drive bevel gear A is fixedly connected to the output shaft of the adjusting motor A. The top of one set of adjusting screws is fixedly connected to a transmission bevel gear A that meshes with the drive bevel gear A.

[0013] Based on the above technical solutions, in order to ensure that the flipping component can be stably assembled and to achieve stable adjustment of the deflection attitude of the fixed frame, the following technical solutions are provided.

[0014] The flipping assembly also includes a splined shaft and an adjusting motor B. The splined shaft is rotatably mounted in the combustion chamber and arranged in a vertical direction. The worm gear is rotatably mounted on the assembly frame and is slidably inserted into the splined shaft. A transmission bevel gear B arranged in the upper assembly chamber is fixedly connected to the top end of the splined shaft. The adjusting motor B is fixedly mounted in the upper assembly chamber and a drive bevel gear B that meshes with the transmission bevel gear B is fixedly connected to its output shaft.

[0015] Based on the above technical solutions, the following technical solutions are provided to ensure that the fixed frame can effectively fix the material sample to be tested.

[0016] The fixed frame has multiple sets of assembly lugs fixed at the corner positions, and vertically arranged fastening bolts are screwed onto the assembly lugs. Washers are fixed to the bottom of the fastening bolts.

[0017] Based on the above technical solutions, in order to effectively detect various data during the combustion process, provide visualized data display, and control the operating attitude of each component, the following technical solutions are provided.

[0018] The hood also includes a control room located on one side of the combustion chamber. The control room is equipped with an electronic display screen exposed to the outside of the hood. The detection equipment includes an infrared thermometer and an industrial camera.

[0019] The beneficial effects of this utility model are:

[0020] 1. Precise flame control and high test repeatability: By combining a burner and a blower, and adjusting the fuel supply and air intake, precise control of flame height, temperature and combustion time can be achieved, ensuring the consistency of test conditions and improving the reliability and repeatability of experimental data.

[0021] 2. The sample positioning is flexible and adaptable to various testing standards. The lifting assembly drives the assembly frame and sample to rise and fall smoothly in the vertical direction, meeting the requirements of different testing standards for sample height. The worm gear drive flipping assembly enables precise adjustment of the sample deflection angle, and the self-locking characteristics of the worm gear ensure that the sample remains stable during combustion, avoiding displacement due to vibration or gravity.

[0022] 3. Comprehensive data acquisition and strong anti-interference capabilities: An infrared thermometer and industrial camera mounted on the upper bracket monitor the thermal changes and combustion patterns on the back of the sample, while the detection equipment mounted on the lower bracket collects flame temperature and height in real time, forming a complete combustion data chain. The detection equipment is positioned at the top of the combustion chamber (near the exhaust pipe) and in the low-temperature area around the flame to avoid high-temperature interference and ensure data accuracy. Simultaneously, the PLC controller in the control room centrally processes the data and displays it in real time on an electronic display screen, improving the visualization of the test.

[0023] 4. Stable structure and reliable operation: The machine housing is divided into an upper assembly chamber, a combustion chamber, a lower assembly chamber, and a control chamber. Heat-resistant components (burner, fixed frame) are located in the combustion chamber, while heat-sensitive components (regulating motor, synchronous belt) are located in the upper assembly chamber. The blower and fuel pipelines are located in the lower assembly chamber, effectively isolating the equipment from high temperatures and extending its lifespan. The lifting assembly uses synchronous belt drive to ensure synchronized operation of multiple lead screws, preventing the assembly frame from tilting. The tilting assembly uses a splined shaft to achieve stable power transmission between the worm gear and the regulating motor B, unaffected by lifting motion. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure assembled inside the casing of this utility model;

[0027] Figure 4 A schematic diagram of the structure for the installation of the sample positioning mechanism and data acquisition components;

[0028] Figure 5 This is a structural schematic diagram from another perspective.

[0029] Figure 6 A structural diagram showing the combination of the flipping component, the fixed frame, and the assembly frame.

[0030] In the diagram: 11 Burner, 12 Blower, 21 Assembly frame, 22 Fixed frame, 221 Assembly pin, 222 Assembly lug, 223 Fastening bolt, 224 Washer, 225 Handwheel, 231 Guide rod, 232 Adjusting screw, 233 Adjusting motor A, 234 Synchronous pulley, 235 Synchronous belt, 236 Drive bevel gear A, 237 Transmission bevel gear A, 241 Worm gear, 242 Worm, 243 Splined shaft, 244 Adjusting motor B, 245 Drive bevel gear B, 246 Transmission bevel gear B, 31 Upper mounting bracket, 32 Lower mounting bracket, 331 Infrared thermometer, 332 Industrial camera, 4 Machine cover, 41 Upper assembly chamber, 42 Combustion chamber, 421 Exhaust pipe, 43 Lower assembly chamber, 44 Control room, 441 Electronic display screen, 45 Cabinet door, 451 Observation window. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-6 A single-root vertical combustion test device includes a combustion assembly and a sample positioning mechanism and a data acquisition assembly arranged above the combustion assembly.

[0033] The combustion assembly includes a burner 11 and a blower 12. The burner 11 is arranged directly below the sample positioning mechanism and in a vertical direction. The blower 12 is assembled and connected to the bottom of the burner 11.

[0034] The sample positioning mechanism includes an assembly frame 21, a fixed frame 22, a lifting assembly, and a tilting assembly. The assembly frame 21 is mounted on the lifting assembly and is driven by the lifting assembly to move vertically. The fixed frame 22 has assembly pins 221 arranged along its centerline fixedly connected to both sides. The assembly pins 221 are rotatably mounted to the centerline of the assembly frame 21. The material sample for the combustion test is nested and fixed in the fixed frame 22. The tilting assembly includes a matching combination of a worm gear 241 and a worm 242. The worm gear 241 is coaxially fixedly connected to one of the assembly pins 221.

[0035] The data acquisition component includes an upper mounting bracket 31, a lower mounting bracket 32, and multiple sets of testing equipment mounted on the upper mounting bracket 31 and the lower mounting bracket 32. The upper mounting bracket 31 is arranged directly above the sample positioning mechanism, and the lower mounting bracket 32 ​​is fixedly installed at the bottom of the assembly frame 21.

[0036] This device is mainly used in the flame retardancy test of cables. The burner 11 works in conjunction with the blower 12 to adjust the air intake and fuel supply. The fuel can be methane or liquefied gas. This allows for precise control of the flame height, flame temperature, and combustion time to conduct combustion tests on the material samples fixed on the fixed frame 22. The testing equipment collects combustion data to provide data support for the flame retardancy performance test of the material samples.

[0037] The material sample is fixedly installed on the fixed frame 22. The lifting component can drive the assembly frame 21, the fixed frame 22 and the material sample to move up and down in the vertical direction to adjust the height of the sample. The flipping component can drive the fixed frame 22 and the material sample on it to adjust the deflection angle to adjust the flame burning angle of the sample.

[0038] Because the combination of worm gear 241 and worm 242 has a one-way self-locking characteristic, that is, worm gear 241 is restricted by worm 242 and cannot deflect independently, the deflection angle of the sample can be accurately positioned.

[0039] To ensure the stable assembly of all components and to achieve their matching combination and stable operation, the following technical solutions are provided.

[0040] It also includes a housing 4, which contains an upper assembly chamber 41, a combustion chamber 42, and a lower assembly chamber 43 arranged sequentially from top to bottom. The burner 11, assembly frame 21, fixing frame 22, and data acquisition components are all arranged in the combustion chamber 42. The upper mounting bracket 31 is fixedly installed at the center of the top of the combustion chamber 42. The top of the combustion chamber 42 is connected to a flue pipe 421. The blower 12 is fixedly installed in the lower assembly chamber 43.

[0041] The upper assembly chamber 41 is used to assemble the heat-sensitive components in the sample positioning mechanism to ensure its stable operation. The inner wall of the combustion chamber 42 is provided with a heat insulation pad to prevent the combustion heat from spreading outward and affecting the normal use of other equipment. The lower assembly chamber 43 is provided to ensure the stable assembly of the blower 12, the fuel pipeline of the burner 11, and the regulating components.

[0042] To ensure stable assembly of the lifting components and precise adjustment of the lifting posture of the assembly frame 21, the following technical solution is provided.

[0043] The lifting assembly includes a guide rod 231, an adjusting screw 232, and an adjusting motor A233. The guide rod 231 is fixedly installed at the corner position of the combustion chamber 42 and arranged vertically. The adjusting screw 232 is rotatably installed on both sides inside the combustion chamber 42. The assembly frame 21 is slidably inserted with the guide rod 231, and the adjusting screw 232 is screwed with the assembly frame 21. The top of each set of adjusting screws 232 is fixedly connected to a synchronous pulley 234 arranged in the upper assembly chamber 41. Each set of synchronous pulleys 234 is powered by a synchronous belt 235. The adjusting motor A233 is fixedly installed in the upper assembly chamber 41, and a drive bevel gear A236 is fixedly connected to the output shaft of the adjusting motor A233. The top of one set of adjusting screws 232 is fixedly connected to a transmission bevel gear A237 that meshes with the drive bevel gear A236.

[0044] The guide rod 231 ensures that the adjusting screw 232 moves stably up and down in the vertical direction. When the adjusting motor A233 is running, the combination of the driving bevel gear A236 and the transmission bevel gear A237 drives the adjusting screw 232 to run stably. The combination of the synchronous pulley 234 and the synchronous belt 235 drives each set of adjusting screws 232 to run synchronously, thereby driving the assembly frame 21 to move stably up and down in the vertical direction.

[0045] To ensure the stable assembly of the flipping assembly and to achieve stable adjustment of the deflection attitude of the fixed frame 22, the following technical solution is provided.

[0046] The flipping assembly also includes a splined shaft 243 and an adjusting motor B244. The splined shaft 243 is rotatably mounted in the combustion chamber 42 and arranged in a vertical direction. The worm gear 242 is rotatably mounted on the assembly frame 21 and is slidably inserted into the splined shaft 243. The top end of the splined shaft 243 is fixedly connected to a transmission bevel gear B246 arranged in the upper assembly chamber 41. The adjusting motor B244 is fixedly mounted in the upper assembly chamber 41 and a drive bevel gear B245 that meshes with the transmission bevel gear B246 is fixedly connected to its output shaft.

[0047] By assembling the regulating motors A233 and B244 into the upper assembly chamber 41, the high temperatures generated by the combustion of the sample in the combustion chamber 42 can be avoided. Through the sliding connection between the spline shaft 243 and the worm gear 242, the power of the regulating motor B244 can be always transmitted to the worm gear 242, so that it is not affected by the lifting and lowering adjustment of the assembly frame 21.

[0048] The detection equipment mounted on the upper mounting bracket 31 is located at the top of the combustion chamber 42 and above the exhaust pipe 421. This area has a lower temperature and is not affected by high-temperature interference. The lower mounting bracket 32 ​​is positioned around the flame of the burner 11, also in a lower temperature range, ensuring that the installed detection equipment can effectively collect data from the combustion test.

[0049] To ensure that the fixing frame 22 can effectively fix the material sample to be tested, the following technical solution is provided.

[0050] Multiple sets of assembly lugs 222 are fixed at the corner positions of the fixed frame 22. Vertically arranged fastening bolts 223 are screwed onto the assembly lugs 222, and washers 224 are fixed to the bottom of the fastening bolts 223.

[0051] The mounting lug 222 ensures the stable assembly of the fastening bolt 223. A handwheel 225 is fixed to the top of the fastening bolt 223 for easy tightening. Tightening the fastening bolt 223 can drive the washer 224 to move up and down, thereby pressing and fixing the sample to be tested into the fixed frame 22.

[0052] During testing, the sample is usually made into a rectangular structure of a specific thickness so that it can be stably arranged in the fixed frame 22, and then pressed and positioned by the gasket 224.

[0053] To achieve effective detection of various data during the combustion process, provide visualized data display, and control the operating attitude of each component, the following technical solutions are provided.

[0054] The hood 4 also has a control room 44 located on one side of the combustion chamber 42. The control room 44 is equipped with an electronic display screen 441 exposed to the outside of the hood 4. The detection equipment includes an infrared thermometer 331 and an industrial camera 332.

[0055] The control room 44 is equipped with a PLC controller, which is used to connect the electronic display screen 441 and the detection equipment. The data detected by the infrared thermometer 331 and the real-time images captured by the industrial camera 332 will be displayed on the electronic display screen 441. In addition, the burner 11 and the regulating motors A233 and B244 are connected to the PLC controller to adjust the flame temperature, height and combustion time, and to adjust the specific posture of the sample positioning mechanism.

[0056] The detection equipment mounted on the lower mounting bracket 32 ​​is used to detect the flame temperature and height, while the detection equipment mounted on the upper mounting bracket 31 is used to detect the heat changes on the back of the material sample and the real-time temperature.

[0057] Cabinet doors 45 are installed in each chamber of the engine cover 4 to facilitate the assembly, maintenance and other operations of the corresponding components. An observation window 451 is also provided on the cabinet door 45 installed on the combustion chamber 42, and heat-resistant glass is installed in the observation window 451.

[0058] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A single-bar vertical combustion test device, characterized in that: This includes a combustion assembly, a sample positioning mechanism positioned above the combustion assembly, and a data acquisition assembly. The combustion assembly includes a burner (11) and a blower (12). The burner (11) is arranged directly below the sample positioning mechanism and in a vertical direction. The blower (12) is assembled and connected to the bottom of the burner (11). The sample positioning mechanism includes an assembly frame (21), a fixed frame (22), a lifting component, and a flipping component. The assembly frame (21) is installed on the lifting component and is driven by the lifting component to move up and down in the vertical direction. The fixed frame (22) has assembly pins (221) fixed on both sides along its own center line. The assembly pins (221) are rotatably installed on the center line of the assembly frame (21). The material sample for the combustion test is nested and fixed in the fixed frame (22). The flipping component includes a matching combination of a worm gear (241) and a worm (242). The worm gear (241) is coaxially fixed with one of the assembly pins (221). The data acquisition component includes an upper mounting bracket (31), a lower mounting bracket (32), and multiple sets of detection devices mounted on the upper mounting bracket (31) and the lower mounting bracket (32). The upper mounting bracket (31) is arranged directly above the sample positioning mechanism, and the lower mounting bracket (32) is fixedly installed at the bottom of the assembly frame (21).

2. The single-root vertical combustion test device according to claim 1, characterized in that: It also includes a housing (4), in which an upper assembly chamber (41), a combustion chamber (42), and a lower assembly chamber (43) are arranged sequentially from top to bottom. The burner (11), the assembly frame (21), the fixing frame (22), and the data acquisition components are all arranged in the combustion chamber (42). The upper mounting bracket (31) is fixedly installed at the center of the top of the combustion chamber (42). The top of the combustion chamber (42) is connected to a flue pipe (421). The blower (12) is fixedly installed in the lower assembly chamber (43).

3. The single-root vertical combustion test device according to claim 2, characterized in that: The lifting assembly includes a guide rod (231), an adjusting screw (232), and an adjusting motor A (233). The guide rod (231) is fixedly installed at the corner position of the combustion chamber (42) and arranged vertically. The adjusting screw (232) is rotatably installed on both sides inside the combustion chamber (42). The assembly frame (21) is slidably connected to the guide rod (231), and the adjusting screw (232) is screwed to the assembly frame (21). Each set of adjusting screws (231) is... 2) The top of each of the components is fixedly connected to a synchronous pulley (234) arranged in the upper assembly chamber (41). Each set of synchronous pulleys (234) is connected to the power through a synchronous belt (235). The regulating motor A (233) is fixedly installed in the upper assembly chamber (41). The output shaft of the regulating motor A (233) is fixedly connected to a drive bevel gear A (236). The top of one set of regulating screws (232) is fixedly connected to a transmission bevel gear A (237) that meshes with the drive bevel gear A (236).

4. The single-root vertical combustion test device according to claim 2, characterized in that: The flipping assembly also includes a splined shaft (243) and an adjusting motor B (244). The splined shaft (243) is rotatably mounted in the combustion chamber (42) and arranged in the vertical direction. The worm gear (242) is rotatably mounted on the assembly frame (21) and is slidably inserted into the splined shaft (243). The top end of the splined shaft (243) is fixedly connected to a transmission bevel gear B (246) arranged in the upper assembly chamber (41). The adjusting motor B (244) is fixedly mounted in the upper assembly chamber (41) and a drive bevel gear B (245) is fixedly connected to the output shaft to mesh with the transmission bevel gear B (246).

5. The single-root vertical combustion test device according to claim 1, characterized in that: The corner of the fixed frame (22) is fixed with multiple sets of assembly lugs (222), and vertically arranged fastening bolts (223) are screwed onto the assembly lugs (222). Washers (224) are fixed to the bottom of the fastening bolts (223).

6. The single-root vertical combustion test device according to claim 2, characterized in that: The hood (4) is also provided with a control room (44) arranged on one side of the combustion chamber (42). The control room (44) is equipped with an electronic display screen (441) exposed to the outside of the hood (4). The detection equipment includes an infrared thermometer (331) and an industrial camera (332).

Images