Comprehensive fire resistance test device

Abstract

The utility model discloses a comprehensive fire resistance test device which comprises a furnace body, a fire spraying pipe group, a temperature detector, a pressure detector, an exhaust port and a water cooler, the inner wall of the furnace body is made of a multi-layer composite refractory material; the fire spraying pipe sets are symmetrically distributed on the left side and the right side of the furnace body, the tail ends of the fire spraying pipes are provided with multi-stage swirl nozzles, and the adjustable range of the angles of the nozzles is + / -15 degrees. A movable partition plate is arranged in the furnace body and divides the furnace body into at least two independent testing areas, and each area is provided with an independent temperature detector, an independent pressure detector and an independent fire spraying pipe set. The water cooler is communicated with the exhaust port through a double-layer spiral cooling pipe, a phase change material is arranged in the double-layer spiral cooling pipe, and an outlet of the water cooler is connected with the flue gas purification module; the device can test different materials or working conditions in different areas, is energy-saving and environment-friendly, and can accurately simulate a complex thermal stress environment.

Description

Technical Field

[0001] This utility model relates to the field of fire resistance testing equipment technology, specifically to a comprehensive fire resistance testing device. Background Technology

[0002] Refractory materials are increasingly widely used in construction, aerospace, energy, and other fields, and their performance testing is crucial for ensuring structural safety. Traditional refractory testing equipment typically uses a single heat source, resulting in uneven temperature distribution, low testing efficiency, and an inability to simulate multiple operating conditions. Furthermore, existing equipment has technical shortcomings in high-temperature flue gas treatment, energy recovery, and independent control of multiple zones, making it difficult to meet the high-precision and high-efficiency requirements of modern materials testing. Limitations of existing technology: 1. Insufficient heat source control: Most devices use fixed burners, with limited flame angle and temperature adjustment range, making it impossible to accurately simulate complex thermal stress environments. 2. Low testing flexibility: Traditional furnace structures are simple, unable to test different materials or operating conditions in separate zones, leading to resource waste. 3. Energy efficiency and environmental deficiencies: Direct emission of high-temperature flue gas results in energy waste, and the lack of an integrated purification system fails to meet green manufacturing requirements. Utility Model Content

[0003] In order to at least overcome one of the technical problems existing in the prior art, this utility model provides a comprehensive fire resistance testing device that can test different materials or working conditions in different areas, is energy-saving and environmentally friendly, and can simulate complex thermal stress environments more accurately.

[0004] A comprehensive refractory testing device includes a furnace body, a flame-spraying tube assembly, a temperature detector, a pressure detector, an exhaust port, and a water cooler. The inner wall of the furnace body is made of multi-layer composite refractory material, including an inner silicon carbide ceramic layer and an outer nano-aerogel insulation layer. The flame-spraying tube assemblies are symmetrically distributed on the left and right sides of the furnace body, each assembly containing at least three independently temperature-controlled flame-spraying tubes. The ends of the flame-spraying tubes are equipped with multi-stage swirling nozzles with an adjustable nozzle angle range of ±15°. The furnace body is equipped with a movable partition that divides the furnace body into at least two independent testing areas. Each area is equipped with an independent temperature detector, a pressure detector, and a flame-spraying tube assembly. The water cooler is connected to the exhaust port through a double-layer spiral cooling pipe. The double-layer spiral cooling pipe contains a phase change material, and the water cooler outlet is connected to a flue gas purification module.

[0005] In some embodiments, the movable partition has a detachable structure, the surface of the partition is covered with a high-temperature resistant ceramic fiber coating, and the edges are provided with elastic sealing strips; the flame tube assembly of each test area is connected to the central controller through a separate gas control valve to adjust the gas flow.

[0006] In some embodiments, the temperature detector includes an infrared thermal imaging array and distributed thermocouples, the distributed thermocouples being arranged at a gradient spacing along the height of the furnace body, with a spacing range of 50-200mm; the pressure detector is a multi-channel differential pressure sensor that monitors the pressure difference between the two sides of the partition in real time and feeds it back to the central controller.

[0007] In some embodiments, the flue gas purification module of the water cooler includes an activated carbon adsorption layer and an electrostatic dust removal unit, and the outer wall of the double-layer spiral cooling pipe integrates a waste heat recovery device for preheating the gas supply pipeline.

[0008] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0010] Figure 1 This is a top-view cross-sectional structural diagram of this application;

[0011] Figure 2 This is a schematic diagram of the front cross-sectional structure of this application;

[0012] Figure 3 This is a structural schematic diagram of the partition in this application.

[0013] Figure label:

[0014] Furnace body 1, silicon carbide ceramic layer 101, nano aerogel insulation layer 102;

[0015] Flame tube assembly 2, flame tube 201, multi-stage swirl nozzle 202, separate control gas valve 203, gas supply pipeline 204;

[0016] Temperature detector 3, pressure detector 4, exhaust port 5;

[0017] Water cooler 6, double-layer spiral cooling pipe 601, flue gas purification module 603, activated carbon adsorption layer 6031, electrostatic dust removal unit 6032, waste heat recovery device 604;

[0018] Partition 7, high-temperature resistant ceramic fiber coating 701, elastic sealing strip 702;

[0019] Central controller 8. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Reference Figures 1-3A comprehensive fire resistance testing device is disclosed, comprising fire resistance performance testing, structural integrity monitoring, and environmental adaptability verification. The device includes a furnace body 1, a flame-spraying pipe assembly 2, a temperature detector 3, a pressure detector 4, an exhaust port 5, and a water cooler 6. The inner wall of the furnace body 1 is constructed of a multi-layer composite refractory material, including an inner silicon carbide ceramic layer 101 and an outer nano-aerogel insulation layer 102. The flame-spraying pipe assemblies 2 are symmetrically distributed on the left and right sides of the furnace body 1, each assembly containing at least three independently temperature-controlled flame-spraying pipes 201. The ends of the flame-spraying pipes 201 are equipped with multi-stage swirling nozzles 202, the angle of which is adjustable within a range of ±15°. A high-temperature resistant corrugated pipe (Inconel) can be added between the nozzle 202 base and the flame-spraying pipe 201. The bellows is made of 625 or ceramic fiber reinforced metal composite material. It is axially compressible / stretchable and radially bendable by ±15°. A threaded locking ring is fitted on the outside of the bellows. When the locking ring is rotated, it compresses the internal graphite sealing gasket and fixes the deformation angle of the bellows. An automatic adjustment structure can also be used to achieve this. The furnace body 1 is equipped with a movable partition 7, which divides the furnace body into at least two independent test areas. Each area is equipped with an independent temperature detector 3, pressure detector 4 and flame tube group 2. The water cooler 6 is connected to the exhaust port 5 through a double-layer spiral cooling pipe 601. The double-layer spiral cooling pipe 601 contains a phase change material, and the outlet of the water cooler 6 is connected to the flue gas purification module 603. The exhaust port 5 can be set in the central area of ​​the top of the furnace body 1. The high-temperature flue gas rises naturally, and the concentrated exhaust at the top can reduce flow resistance and reduce the energy consumption of the induced draft fan. The exhaust port 5 can also be symmetrically distributed on the upper side of the furnace body 1. It is suitable for ultra-wide furnace bodies (width > 3m). One or more exhaust ports are set on each side 20cm from the top to avoid dead corners where flue gas stagnates.

[0025] In some embodiments, the movable partition 7 has a detachable structure, and the partition 7 can be a single piece or multiple pieces combined with a frame; this quick-assembly and disassembly structure can consist of the following components:

[0026] A. Embedded guide rail system: High-temperature resistant alloy guide rails are symmetrically arranged on both sides of the inner wall of the furnace body 1. The guide rail cross section is a T-shaped groove structure, which slides with the T-shaped buckle on the edge of the partition plate 7.

[0027] B. Locking mechanism: The bottom of the partition 7 is equipped with a manual knob lock. The knob drives the wedge block to press against the side wall of the guide rail through the thread, thereby fixing the partition.

[0028] C. Sealing assembly: The edge of the partition 7 is covered with an elastic sealing strip. The sealing strip is made of woven ceramic fiber-graphite composite material, which forms an airtight contact with the inner wall of the furnace body 1 after being compressed;

[0029] D. Positioning assistance: Positioning grooves are set at intervals on the inner side of the guide rail, and high-temperature resistant spring steel balls are embedded in the T-shaped buckles, which generate tactile feedback when they are engaged in the grooves.

[0030] The quick-assembly structure can also consist of the following components: symmetrical high-temperature alloy fixing plates are arranged on both sides of the inner wall of the furnace body 1; the partition plate 7 is fastened to the fixing plate with bolts; and high-temperature resistant elastic sealing strips or other sealing materials are used to cover the partition plate 7 with the fixing plate and the furnace body, as well as between the fixing plates and the furnace body.

[0031] The surface of the partition 7 is covered with a high-temperature resistant ceramic fiber coating 701, and the edge is provided with an elastic sealing strip 702; the flame tube assembly 2 of each test area is connected to the central controller 8 through the sub-control gas valve 203 to adjust the gas flow.

[0032] The high-temperature resistant ceramic fiber coating 701 can withstand continuous heating to 1600℃; the elastic sealing strip 702 (a graphite-containing silicone rubber composite material) undergoes adaptive deformation under pressure to ensure zoned airtightness; the separate control gas valve 203 is equipped with a piezoelectric ceramic actuator, providing high flow regulation resolution.

[0033] In some embodiments, the temperature detector 3 includes an infrared thermal imaging array and distributed thermocouples. The distributed thermocouples are arranged at a gradient spacing along the height of the furnace body, with a spacing range of 50-200 mm. The furnace body 1 typically exhibits a significant temperature gradient in the vertical direction (e.g., the direct flame radiation zone can reach 1200℃, while other areas may only reach 600℃). By arranging the thermocouples at a gradient spacing, the thermocouple spacing is relatively small (e.g., one group every 20 cm), achieving high-resolution temperature monitoring. In the low-temperature zone, the spacing gradually increases (e.g., one group every 50 cm), reducing costs while ensuring data validity. The pressure detector 4 is a multi-channel differential pressure sensor that monitors the pressure difference between the two sides of the partition 7 in real time and feeds it back to the central controller 8.

[0034] In some embodiments, the flue gas purification module 603 of the water cooler 6 includes an activated carbon adsorption layer 6031 and an electrostatic dust removal unit 6032. The electrostatic dust removal unit 6032 uses corona discharge and a high-voltage electrode to charge particulate matter. The positive grounded aluminum plate adsorbs the charged particles. Dust removal is performed using compressed air pulse backflushing. The electrostatic field can promote the agglomeration and increase of aerosol particles, improving the subsequent activated carbon adsorption efficiency. The electrode plate is made of 310S stainless steel, which can withstand short-term high-temperature impacts of 500°C. In conjunction with the water cooler 6, the flue gas is cooled to below 250°C before further treatment. The activated carbon adsorption layer 6031 can adsorb toxic gases and intercept heavy metals. Furthermore, the double-layer spiral... The outer wall of the spiral cooling tube 601 integrates a waste heat recovery device 604 for preheating the gas supply pipeline 204. The waste heat recovery device 604 can be a spiral coil type, which is closely attached to the outer wall of the double-layer spiral cooling tube 601 to form a coaxial heat exchange channel. The waste heat recovery device 604 can be made of high-temperature and corrosion-resistant austenitic stainless steel or nickel-based alloy, and the surface is coated with an anti-oxidation ceramic coating. When the high-temperature flue gas (about 300-600℃) flows through the inner layer of the double-layer spiral cooling tube 601, the outer tube wall absorbs its radiant heat and convection. The waste heat recovery device 604 conducts the heat from the tube wall to the heat transfer medium or directly to the gas through a heat exchanger.

[0035] Working Principle: 1. Symmetrical Flame Tube Design of Multi-Source Thermal Field Precision Control System: Flame tube groups distributed on the left and right sides (each group has ≥3 independent temperature-controlled flame tubes) form a dynamic flame matrix through multi-stage swirling nozzles (angle adjustable ±15°), achieving uniform three-dimensional heat flow coverage. 2. Independent Temperature Control Logic: The gas flow rate of each flame tube 201 is regulated by the sub-control gas valve 203. Combined with the feedback algorithm of the central controller 8, it can simulate complex working conditions such as gradient temperature rise and sudden thermal shock. 3. Modular Test Space Management: The partition 7 achieves high-temperature sealing through a high-temperature resistant ceramic fiber coating 701 and an elastic sealing strip 702, dividing the furnace body into two or more independent test areas, supporting synchronous comparative tests (such as comparison of the fire resistance performance of different materials). 4. High-Efficiency Thermal Management and Environmentally Friendly Phase Change Material Cooling: The double-layer spiral cooling pipe 601 utilizes the latent heat absorption characteristics of phase change materials (such as paraffin alloys) to rapidly reduce the flue gas temperature and reduce the energy consumption of traditional water cooling systems. 5. Waste heat recycling: After purification by the activated carbon adsorption layer (6031) and electrostatic dust removal unit (6032) of the flue gas purification module 603, the waste heat recovery device 604 feeds the heat energy back to the gas supply pipeline 204, improving energy utilization. 6. Intelligent monitoring and feedback multi-dimensional sensor network: An infrared thermal imaging array and distributed thermocouples (50-200mm gradient spacing) plot the temperature field distribution in real time; a multi-channel differential pressure sensor monitors the pressure difference across the partition, dynamically adjusting the flame parameters to maintain test stability.

[0036] II. Key Technical Issues Solved: 1. Uniformity Deficiency in Traditional Fire Resistance Testing: The turbulent flame of the swirl nozzle 202 and the symmetrical spray layout eliminate temperature dead zones caused by single-point heat sources, solving the problem of test data deviation caused by uneven material heating. 2. Insufficient Multi-condition Simulation Capability: Independent temperature-controlled spray tube assemblies and baffles work together to simultaneously simulate different stages of fire development (such as flashover and decay stages) or differences in the thermal environment of different spaces, meeting the testing needs of complex scenarios. 3. Energy Waste and Environmental Pollution: The phase change cooling + waste heat recovery system reduces energy consumption by more than 40%; the electrostatic dust removal unit 6032 has a PM2.5 capture efficiency of >99%, meeting industrial emission standards. 4. Bottlenecks in Testing Efficiency and Flexibility: The modular partition design allows for comparison of multiple material properties in a single test, improving efficiency by 200% compared to traditional single-zone testing.

[0037] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A comprehensive fire resistance test installation comprising a furnace body (1), characterized in that: It also includes a flame spraying pipe group (2), a temperature detector (3), a pressure detector (4), an exhaust port (5) and a water cooler (6); The inner wall of the furnace body (1) is made of multi-layer composite refractory material, including an inner layer of silicon carbide ceramic layer (101) and an outer layer of nano aerogel thermal insulation layer (102); The flame spraying pipe group (2) is symmetrically distributed on the left and right sides of the furnace body (1), and each group contains at least three independently temperature-controlled flame spraying pipes (201), the end of the flame spraying pipe (201) is provided with a multi-stage cyclone nozzle (202), and the angle of the nozzle (202) can be adjusted in the range of ±15°. The furnace body (1) is provided with a movable partition plate (7), which divides the furnace body into at least two independent test areas, and each area is provided with an independent temperature detector (3), a pressure detector (4) and a flame spraying pipe group (2); The water cooler (6) is communicated with the exhaust port (5) through a double-layer spiral cooling pipe (601), the double-layer spiral cooling pipe (601) is provided with phase change material, and the outlet of the water cooler (6) is connected with a flue gas purification module (603).

2. The apparatus of claim 1, wherein: The movable partition plate (7) adopts a detachable structure, the surface of the partition plate (7) is covered with a high-temperature-resistant ceramic fiber coating (701), and the edge is provided with an elastic sealing strip (702); the flame spraying pipe group (2) of each test area is connected with the central controller (8) through a separate control gas valve (203), and the gas flow is adjusted.

3. The apparatus of claim 2, wherein: The temperature detector (3) includes an infrared thermal imaging array and a distributed thermocouple, the distributed thermocouple is arranged in a gradient interval along the height direction of the furnace body, and the interval ranges from 50mm to 200mm; the pressure detector (4) is a multi-channel differential pressure sensor, which monitors the pressure difference between the two sides of the partition plate (7) in real time and feeds back to the central controller (8).

4. The apparatus of claim 3, wherein: The flue gas purification module (603) of the water cooler (6) includes an activated carbon adsorption layer (6031) and an electrostatic dust removal unit (6032), and the outer wall of the double-layer spiral cooling pipe (601) is integrated with a waste heat recovery device (604) for preheating the gas supply pipeline (204).

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