Deformable fire-resistant detection equipment

Abstract

The utility model discloses deformable fire resistance detection equipment which comprises a furnace body, one end of the furnace body is provided with a furnace door capable of being opened and closed, the inner wall of the furnace body is provided with a fire-resistant layer and a nanometer aerogel heat preservation layer in a composite mode, and a furnace cavity with a variable length is formed in the furnace body. A pair of self-lubricating silicon carbide ceramic guide rails are symmetrically arranged in the furnace chamber in the length direction, a partition wall is connected to the guide rails in a sliding mode, a wavy high-temperature-resistant silicon rubber sealing layer is arranged on the periphery of the partition wall, and a closing door capable of being opened and closed is embedded in the partition wall. The partition wall moves along the guide rail through a ball screw mechanism driven by a servo motor, and the furnace chamber is dynamically divided into a main combustion area and an auxiliary adjusting area. The top of the main combustion area is provided with a plurality of groups of telescopic fire spraying pipes with adjustable angles, and the bottom of the main combustion area is provided with a multi-stage array type temperature detector and a pressure detector; the length of the furnace chamber can be changed, the combustion control precision is high, and the heat insulation performance is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire resistance detection technical field, concretely relates to a deformable fire resistance detection equipment. BACKGROUND

[0002] The performance detection equipment of refractory material has important role in industrial high temperature environment evaluation, but the traditional detection device has significant limitation in dynamic adjustment ability, energy efficiency control and test precision.

[0003] 1. The rigidity of the furnace body structure is insufficient in adaptability

[0004] The conventional refractory detection furnace is mostly designed with fixed volume, and the size of the combustion area cannot be dynamically adjusted according to the test requirements. For example, when local refractory material is tested, the entire furnace cavity still needs to be continuously heated, resulting in energy waste.

[0005] 2. Low combustion control precision and uneven heat field distribution

[0006] The conventional flame spraying system mostly adopts a fixed angle and power flame spraying mode, which is difficult to adjust the combustion parameters in real time according to the temperature distribution. The temperature detector is usually arranged at a single point, which cannot capture the gradient change in the furnace cavity, resulting in local overheating or underheating, affecting the data reliability. At the same time, the adjustment of the mixing ratio of fuel gas and air relies on manual intervention, and the response speed is slow.

[0007] 3. Performance bottleneck of heat insulation material

[0008] The insulation layer of the existing equipment mostly adopts traditional ceramic fiber or aluminum silicate material, and its thermal conductivity coefficient is generally higher than 0.03 W / (m·K), and the heat loss is serious at high temperature.

[0009] 4. Lack of dynamic partitioning and pressure regulation technology

[0010] The existing equipment lacks movable furnace cavity partition structure, and cannot flexibly divide the main combustion area and auxiliary adjustment area. When the test range needs to be expanded, the hardware configuration needs to be adjusted during shutdown, which is low in efficiency. In addition, the auxiliary area is usually not configured with active heat insulation device, which makes it difficult to inhibit heat diffusion and increases the difficulty of temperature control. UTILITY MODEL CONTENTS

[0011] In order to at least overcome one of the technical problems existing in the prior art, the utility model provides a deformable fire resistance detection equipment, which can change the length of the furnace cavity, has high combustion control precision, and has good heat insulation and heat preservation.

[0012] The utility model relates to a deformable fireproof detection device, including the furnace body, one end of the furnace body is equipped with the furnace door that can be opened and closed, the inner wall of the furnace body is provided with the refractory layer and nano aerogel heat preservation layer, and the inside forms the furnace chamber of variable length, a pair of self -lubricating silicon carbide ceramic guide rail is arranged in the furnace chamber along the length direction symmetry, the guide rail is slidably connected with the partition wall, the peripheral edge of the partition wall is equipped with the wave shape high temperature silicon rubber sealing layer, and the partition wall is embedded with the close door that can be opened and closed on the partition wall, the furnace chamber is dynamically separated into the main combustion area and the auxiliary adjustment area through the ball screw mechanism of servo motor drive of the partition wall along the guide rail, the top of the main combustion area is equipped with multiple groups of adjustable angle and telescopic fire -spouting pipe, and the bottom is arranged multiple stage array type temperature detector and pressure detector, the displacement feedback module of servo motor is connected with the gas valve of fire -spouting pipe and temperature detector signal, and according to the real -time position of partition wall and furnace chamber temperature distribution, the number of opening fire -spouting pipe, the angle of injection and the combustion power are automatically matched.

[0013] In some embodiments, the thickness of the wave shape high temperature silicon rubber sealing layer is 8-12mm, the contact pressure with the inner wall of the furnace chamber is dynamically adjusted by pre-tightening spring, and the air tightness of the furnace chamber during the movement of the partition wall is improved.

[0014] In some embodiments, the fire -spouting pipe includes gas nozzle, air cyclone and guide plate, the guide plate is the porous titanium alloy plate, the adjustable included angle of 30 DEG -60 DEG between the guide plate and the axis of the fire -spouting pipe is formed by the step motor, and the porosity of the guide plate is gradiently increased along the length direction of the furnace chamber.

[0015] In some embodiments, at least one folding multilayer heat insulation curtain is hiddenly installed in the groove on the top of the auxiliary adjustment area, and can be stretched to the bottom to be fixed, and the heat insulation curtain is composed of metal reflecting foil, graphene aerogel interlayer and ceramic fiber cloth.

[0016] In some embodiments, the pressure detector is a multi-channel differential pressure sensor array, and the output signal thereof adjusts the mixing ratio of the gas valve in real time, and when the pressure fluctuation in the main combustion area is detected to be greater than or equal to 3%, the gas flow of the adjacent fire -spouting pipe is automatically compensated.

[0017] In some embodiments, the porosity of the nano aerogel heat preservation layer is 95%-98%, the thermal conductivity coefficient is less than or equal to 0.018 W / (m K), the surface is coated with a silicon carbide reflective coating, and the reflectivity is greater than or equal to 85%.

[0018] Additional aspects and advantages of the utility model will also be given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0020] Fig. 1 is the main view cross-sectional structure schematic diagram of the present application;

[0021] Fig. 2 is the structure schematic diagram of the partition wall of the present application.

[0022] Reference signs:

[0023] Furnace body 1, furnace door 2;

[0024] Refractory layer 31, nano aerogel thermal insulation layer 32, silicon carbide reflective coating 321;

[0025] Furnace cavity 4, main combustion zone 41, auxiliary adjustment zone 42;

[0026] Self-lubricating silicon carbide ceramic guide rail 5;

[0027] Partition wall 6, wave-shaped high-temperature-resistant silicone rubber sealing layer 61;

[0028] Closed door 7;

[0029] Servo motor 8, ball screw mechanism 81;

[0030] Flame jet pipe 9;

[0031] Gas valve 91, gas nozzle 92, air cyclone 93, guide plate 94, stepping motor 95;

[0032] Temperature detector 10, pressure detector 11;

[0033] Folding multi-layer heat insulation curtain 43;

[0034] Metal reflective foil 431, graphene aerogel interlayer 432, ceramic fiber cloth 433. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0036] In the description of the utility model, need understanding, if relate to the direction description, for example the term "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on the direction or position relation indicated is based on the direction or position relation shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not the indication or the implication of the device or the element that is indicated must have the specific direction, constructs and operates with the specific direction, therefore can not be understood as the restriction of the utility model.

[0037] In the description of the utility model, several meanings are one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first, second is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0038] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Referring to Figs. 1-2 A deformable fire detection device, deformable refers to the length of the furnace cavity 4 can be changed, including furnace body 1, one end of the furnace body 1 is provided with openable furnace door 2, the inner wall of the furnace body 1 is provided with refractory layer 31 and nano aerogel insulation layer 32 in combination, and the inside forms a furnace cavity 4 with variable length; the refractory layer 31 directly contacts the furnace cavity 4, which can adopt corundum-mullite refractory castable, and can withstand 1200-1600 DEG C high temperature flame direct impact; the nano aerogel insulation layer 32 is closely attached to the outside of the refractory layer, which can adopt SiO2 aerogel doped with silicon carbide nanowire, and the heat flux density is controlled to be ≤1500W / m 2The thermal conductivity of the fire-resistant layer 31 (1.2 W / m·K) forms a gradient transition with the aerogel layer 32 (0.018 W / m·K), avoiding thermal stress concentration; a pair of self-lubricating silicon carbide ceramic guide rails 5 can be symmetrically arranged in the length direction on the top and bottom of the furnace cavity 4, a total of two pairs, to improve stability during movement; the guide rails 5 are connected with a partition wall 6 through sliding connection; the partition wall 6 is provided with a wave-shaped high-temperature-resistant silicone rubber sealing layer 61 around the circumference; and the partition wall 6 is embedded with an openable and closable closing door 7; materials can be put in or taken out through the closing door 7; the partition wall 6 moves along the guide rail 5 through a ball screw mechanism 81 driven by a servo motor 8, dynamically dividing the furnace cavity 4 into a main combustion area 41 and an auxiliary adjustment area 42; the servo motor 8 is flange-mounted on the side wall of the furnace body 1, and the output shaft is rigidly connected with the screw shaft of the ball screw mechanism 81 through a shaft coupling; the screw nut of the ball screw mechanism 81 is fixed with the back plate of the partition wall 6 through high-strength bolts, and the nut seat is integrated with an anti-twist key groove, forming a sliding pair with the guide surface of the guide rail 5; the double guide rails of the self-lubricating silicon carbide guide rail 5 are installed in parallel on the bottom of the furnace cavity 4, and the bottom of the partition wall 6 is provided with a T-shaped sliding block, which is in interference fit with the V-shaped groove of the guide rail 5; the motion transmission path is: servo motor 8→shaft coupling→ball screw 81 (rotation→linear motion)→partition wall 6→guide rail 5 (guiding and restraining); the top and / or side wall of the main combustion area 41 is provided with multiple groups of adjustable-angle and telescopic flame injection pipes 9; in order to avoid the partition wall 6 colliding with the flame injection pipes 9 when moving linearly, a hydraulic cylinder can be mounted on the furnace body 1 to retract the flame injection pipes, or a manual folding mode of 90 degrees into a hidden groove can be adopted; multi-stage array type temperature detectors 10 and pressure detectors 11 are arranged on the bottom and side wall; the displacement feedback module of the servo motor 8 is signal-connected with the gas valve 91 of the flame injection pipe 9 and the temperature detector 10, and automatically matches the number of opened flame injection pipes 9, the injection angle and the combustion power according to the real-time position of the partition wall 6 and the temperature distribution of the furnace cavity 4; the gas valve 91 can be connected with the flame injection pipe 9 through a high-temperature-resistant hose.

[0040] The application breaks through the limitation of traditional fixed-size furnace cavity through the design of dynamically adjusting the length of the furnace cavity. The partition wall driven by the servo motor can flexibly divide the main combustion area and the auxiliary adjustment area according to the detection requirements, realizing on-demand heating. This dynamic zoning technology can reduce invalid heating space by more than 30%, and reduce comprehensive energy consumption by 15-20%, solving the problem of energy waste commonly existing in industrial detection.

[0041] The wave-shaped silicone rubber sealing layer cooperates with the dynamic compensation mechanism of the pre-tightening spring, and can still maintain a small deformation sealing gap at a high temperature of 1200℃. Compared with traditional asbestos sealing materials, its service life is increased by more than 3 times, and the air leakage rate is small, effectively solving the air tightness problem of high-temperature expansion and contraction moving parts.

[0042] A closed-loop control system with a multi-level array of temperature detectors and an adjustable flame tube achieved a temperature field control accuracy of ±2℃. A specially designed gradient porosity guide plate improved heat flux distribution uniformity by 40%, resolving the edge effect problem present in traditional equipment and providing an experimental basis for high-precision fire resistance testing.

[0043] A multi-channel differential pressure sensor array monitors pressure changes in real time at a sampling frequency of 100Hz, and with millisecond-level compensation for gas flow (response time <0.1s), pressure fluctuations are controlled within ±1.5%. This technology improves the reliability of performance test data for refractory materials under abrupt temperature fields by more than 35%.

[0044] The modular design allows the equipment to meet testing needs ranging from 50mm small refractory bricks to 3m long composite materials. By adjusting the angle and extension of the burner tube, the same equipment can perform tests of different standards, improving equipment utilization.

[0045] In some embodiments, the thickness of the corrugated high-temperature resistant silicone rubber sealing layer 61 is 8-12 mm. Its contact pressure with the inner wall of the furnace cavity 4 is dynamically adjusted by a pre-tensioning spring, improving the airtightness of the furnace cavity 4 during the movement of the partition wall 6. The corrugated structure design: the 8-12 mm thick corrugated profile undergoes multi-stage elastic deformation under the action of the pre-tensioning spring, forming an alternating "peak-valley" contact surface. When the partition wall 6 moves, the corrugated structure compensates for the microscopic unevenness of the inner wall of the furnace cavity through continuous deformation, ensuring uninterrupted sealing of the contact surface. The spring assembly maintains a constant contact pressure between the sealing layer 61 and the furnace wall with an initial pre-tensioning force, which can compensate for the thermal expansion of the silicone rubber in real time. The silicone rubber matrix is ​​doped with alumina and silicon carbide nanoparticles, allowing the sealing layer to maintain a Shore hardness of 65-75A at high temperatures, while a dense oxide layer forms on the surface, slowing down the aging rate.

[0046] In some embodiments, the flame tube 9 includes a gas nozzle 92, an air cyclone separator 93, and a guide plate 94; the gas nozzle 92 is fixed to the front end of the flame tube 9 at a distance of 1.2 times the nozzle diameter (typically 12-15 mm) from the tube opening to avoid the risk of backfire; the gas nozzle 92 is inserted into the inner hole of the front end of the air cyclone separator 93 and fixed by a high-temperature alloy retaining ring; the 12 guide blades of the cyclone separator 93 and the 6-hole injection channel of the gas nozzle 92 are staggered at a 30° angle. A three-dimensional turbulent field is formed; the air cyclone separator 93 and the guide plate 94 are connected by a flange quick-release connection, and the rotating shaft of the guide plate 94 is linked to the stepper motor 95 through a magnetic coupler; the cyclone separator 93 is responsible for generating the primary swirling field, and the guide plate 94 performs secondary shaping of the swirling field; the guide plate 94 is a porous titanium alloy plate, which is driven by the stepper motor 95 to form an adjustable angle of 30°-60° with the axis of the flame tube 9, and the porosity of the guide plate 94 increases gradually along the length of the furnace cavity 4.

[0047] in,

[0048] Gas nozzle 92: It adopts a venturi structure design, which creates a negative pressure zone through the throat effect, increasing the air intake by 30%;

[0049] Air cyclone 93: It has 12 built-in spiral guide vanes with a swirl angle of 45°, which makes the air generate a tangential velocity component and form a three-dimensional turbulent mixing field with the gas jet, resulting in high mixing uniformity.

[0050] Porous titanium alloy guide plate 94: Porosity gradient design (20% at the inlet end → 65% at the end) to match the heat load distribution law along the length of the furnace cavity 4; pore size gradient change (0.5mm → 2mm) to achieve smooth attenuation of airflow velocity from 15m / s to 8m / s.

[0051] Thermodynamic effects of gradient porosity:

[0052] High-porosity end (near the fire source): A micro-jet array (0.5mm diameter × 200 holes) is formed with 65% porosity, penetrating the flame core region and reducing temperature fluctuations at local high-temperature points (>1300℃) to ±15℃.

[0053] Low porosity end (far field region): 20% porosity generates a back pressure effect, making the flame length adjustable from 0.8 to 2.4m to meet the needs of different furnace cavity zones.

[0054] In some embodiments, two folded multi-layer heat insulation curtains 43 are concealed and installed in the groove at the top of the auxiliary adjustment area 42. These curtains can be stretched to the bottom and fixed. The heat insulation curtains 43 are composed of a metal reflective foil 431, a graphene aerogel interlayer 432, and a ceramic fiber cloth 433. They are stored in the top groove in a Z-shape, resulting in a small volume. When unfolded, their lower ends can be fixed to the furnace body 1 by clips or bolts. The metal reflective foil 431 can reflect more than 90% of radiant heat, the graphene aerogel interlayer 432 can effectively block the heat conduction of gas molecules, and the ceramic fiber cloth 433 is interwoven into a porous structure to effectively absorb the remaining transmitted heat flow.

[0055] In some embodiments, the pressure detector 11 is a multi-channel differential pressure sensor array, whose output signal adjusts the mixing ratio of the gas valve 91 in real time. When a pressure fluctuation of ≥3% is detected in the main combustion zone 41, the gas flow of the adjacent flame tube 9 is automatically compensated.

[0056] In some embodiments, the nano-aerogel insulation layer 32 has a porosity of 95%-98% and a thermal conductivity of ≤0.018W / (m·K). Its surface is coated with a silicon carbide reflective coating 321 with a reflectivity of ≥85%. This coating is used to directly reflect the high-temperature radiant heat in the furnace cavity 4 back into the furnace cavity, reducing the heat loss rate. The hardness reaches Mohs 9.2, preventing the aerogel layer 32 from being worn by furnace ash. A dense silicon oxide passivation layer is formed, which improves the resistance to high-temperature oxidation.

[0057] How this application works:

[0058] 1. Dynamic Zoning and Combustion Control: (1) Variable Furnace Chamber Structure: The partition wall 6 is moved by the ball screw mechanism 81 driven by the servo motor, which dynamically divides the furnace chamber 4 into the main combustion zone 41 and the auxiliary adjustment zone 42. The corrugated silicone rubber sealing layer 61 of the partition wall 6 is dynamically attached to the inner wall of the furnace chamber by the pre-tightening spring to ensure airtightness. (2) Intelligent Combustion Adjustment: The injection angle, extension length and gas flow of the flame tube 9 are controlled in real time by the displacement feedback module. The data of the temperature detector 10 and the pressure detector 11 are fed back to the control system to dynamically match the working parameters of the flame tube 9, such as the number of openings and the gas mixing ratio, to achieve precise temperature field distribution.

[0059] 2. Thermal management and energy-saving design:

[0060] (1) Composite insulation layer: The extremely low thermal conductivity of the nano aerogel layer 32 combined with the silicon carbide reflective coating 321 reduces heat radiation loss; the folded heat insulation curtain 43 further blocks heat diffusion after the auxiliary adjustment area 42 is unfolded.

[0061] (2) Airflow optimization: The guide plate 94 of the flame tube 9 forms a swirling combustion through a porous titanium alloy plate and gradient porosity design, which improves the mixing efficiency of gas and air and reduces the risk of local high temperature points.

[0062] 3. Pressure balance and safety mechanism: Multi-channel differential pressure sensor: Pressure detector 11 monitors the pressure fluctuation in the main combustion zone 41 in real time. When the fluctuation is ≥3%, the gas flow of the adjacent flame tube 9 is automatically adjusted to avoid the risk of deflagration or flameout.

[0063] II. Achieved Technical Effects

[0064] 1. High-efficiency combustion and energy consumption optimization

[0065] (1) Dynamic zoning: The length of the furnace cavity 4 is adjusted according to the detection requirements. The main combustion zone 41 only heats the necessary area, and the auxiliary adjustment zone 42 is isolated by the heat insulation curtain 43 to reduce ineffective energy consumption.

[0066] (2) Precise temperature control: The multi-level temperature detector 10 and the adjustable flame tube 9 work together to achieve small temperature field uniformity error, which is suitable for high-precision refractory testing, such as ceramic sintering and metal heat treatment.

[0067] 2. Improved reliability and security

[0068] Airtightness Guarantee: The combination of the corrugated sealing layer 61 and the pre-tightening spring maintains contact pressure even under high-temperature deformation, resulting in a low leakage rate. Pressure Fluctuation Resistance: The rapid response of the multi-channel differential pressure sensor, combined with gas flow compensation, effectively suppresses sudden pressure changes and prevents equipment damage.

[0069] 3. Material properties and lifespan extension

[0070] High-temperature resistant design: The self-lubricating silicon carbide guide rail 5 and graphene aerogel interlayer 432 maintain stability at 1200℃, increasing the continuous working life of the equipment by more than 30%. Easy maintenance: The modular flamethrower tube 9 and folding heat insulation curtain 43 design support quick replacement, reducing downtime.

[0071] 4. Environmental protection and adaptability: Low-emission combustion, the air cyclone 93 and gradient guide plate 94 ensure complete combustion of gas, resulting in low CO emissions.

[0072] 5. Multi-scenario adaptation: By adjusting the length of the furnace cavity 4 and the parameters of the flame tube 9, it can be compatible with test requirements of different sized specimens, such as refractory bricks and composite materials.

[0073] This application achieves high efficiency, accuracy, and safety in fire resistance testing through dynamic zoning, intelligent feedback control, and the application of composite materials. It also boasts advantages such as energy saving, environmental protection, and long lifespan, making it suitable for industrial-grade high-temperature testing scenarios.

[0074] 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 deformable refractory testing device, comprising a furnace body (1), characterized in that: The furnace body (1) is provided with an openable and closable furnace door (2) at one end. The inner wall of the furnace body (1) is provided with a refractory layer (31) and a nano-aerogel insulation layer (32), forming a variable length furnace cavity (4). A pair of self-lubricating silicon carbide ceramic guide rails (5) are symmetrically arranged along the length direction inside the furnace cavity (4). A partition wall (6) is slidably connected to the guide rail (5). A wave-shaped high-temperature resistant silicone rubber sealing layer (61) is provided around the partition wall (6), and an openable and closable closed door (7) is embedded in the partition wall (6). The partition wall (6) moves along the guide rail (5) via a ball screw mechanism (81) driven by a servo motor (8), dynamically dividing the furnace cavity (4) into a main combustion zone (41) and an auxiliary adjustment zone (42). The main combustion zone (41) is equipped with multiple sets of adjustable angle and retractable flame tubes (9) at the top and multi-level array temperature detectors (10) and pressure detectors (11) at the bottom. The displacement feedback module of the servo motor (8) is connected to the gas valve (91) and temperature detector (10) of the flame tube (9). Based on the real-time position of the partition wall (6) and the temperature distribution of the furnace cavity (4), the number of flame tubes (9) opened, the injection angle and the combustion power are automatically matched.

2. The deformable fire-resistant testing equipment as described in claim 1, characterized in that: The thickness of the wave-shaped high-temperature resistant silicone rubber sealing layer (61) is 8-12mm. Its contact pressure with the inner wall of the furnace cavity (4) is dynamically adjusted by the pre-tightening spring to improve the airtightness of the furnace cavity (4) during the movement of the partition wall (6).

3. The deformable fire-resistant testing equipment according to claim 2, characterized in that: The flame tube (9) includes a gas nozzle (92), an air vortex generator (93) and a guide plate (94). The guide plate (94) is a porous titanium alloy plate. It is driven by a stepper motor (95) to form an adjustable angle of 30°-60° with the axis of the flame tube (9). The porosity of the guide plate (94) increases gradually along the length of the furnace cavity (4).

4. The deformable fire-resistant testing equipment according to claim 3, characterized in that: At least one folded multi-layer heat insulation curtain (43) is hidden in the groove at the top of the auxiliary adjustment area (42), which can be stretched to the bottom and fixed. The heat insulation curtain (43) is composed of a metal reflective foil (431), a graphene aerogel interlayer (432), and a ceramic fiber cloth (433).

5. The deformable fire-resistant testing equipment according to claim 4, characterized in that: The pressure detector (11) is a multi-channel differential pressure sensor array. Its output signal adjusts the mixing ratio of the gas valve (91) in real time. When the pressure fluctuation in the main combustion zone (41) is detected to be ≥3%, the gas flow of the adjacent flame tube (9) is automatically compensated.

6. The deformable fire-resistant testing equipment according to claim 5, characterized in that: The nano-aerogel insulation layer (32) has a porosity of 95%-98% and a thermal conductivity of ≤0.018W / (m·K). Its surface is coated with a silicon carbide reflective coating (321) with a reflectivity of ≥85%.

Images