866 results about "Fire resistance" patented technology

The invention discloses a preparation method of a B1-grade flame-retardant fire-resistant control cable, belongs to the technical field of flame-retardant fire-resistant cables, and aims to solve the technical problem that the mechanical strength and the fire-resistant and flame-retardant performance of an inorganic flame-retardant modified fire-resistant fire-resistant control cable in the prior art need to be further improved. The method comprises the following steps that a plurality of cable cores are arranged in parallel, gaps among the cable cores are filled with filling ropes to form filling layers, the cable cores filled with the filling layers are wrapped together through a wrapping tape, and a wrapping layer is formed outside the cable cores. According to the invention, maleic anhydride modified polyethylene is used as a phase solvent, and polyethylene is cross-linked and enhanced by modified graphite and modified polysiloxane, so that not only is the mechanical strength of the cable material effectively improved, but also the fire resistance and flame retardance of the cable material are improved.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

In order to solve the problems of heat conduction, excessive ceramization, influence on the performance of a part which is not subjected to a fire disaster and increase of maintenance cost, an armored protection layer and a separation assembly are arranged at an interval, and the separation assembly is of a continuous broken-line-shaped tubular structure, so that the bending difficulty of the cable can be reduced, and the cable is suitable for being laid in a narrow and small space; the partition assembly comprises a folding cavity, an outer layer shell and an inner layer shell, a V-shaped groove is formed in the downward bending position of the outer layer shell, ceramization powder accounting for two thirds of the volume of the outer layer shell is contained in the V-shaped groove, the powder can enter the folding cavity after a plugging piece in a side circulation hole is heated and melted, and according to the design, ceramization reaction spreading is controlled through a sectional structure, thermal stress concentration is relieved, and the service life of the ceramic is prolonged. The heat insulation effect is enhanced, continuous work of the cable in a fire disaster is guaranteed, the problem of flexibility reduction caused by unnecessary ceramization is avoided, and construction flexibility and fire-resistant reliability are both considered.

The application provides a large-span bridge substructure vehicle-fire wind force real-time hybrid test platform and implementation method, the platform comprises a physical loading and transmission system, a T-shaped wind-fire coupling simulation system, a modularized prying integrated system, an intelligent control and calculation system and a multi-dimensional high-precision monitoring system. The method realizes real-time pre-test of the boundary displacement / force of the test piece through the construction of a numerical substructure fast calculation model based on LSTM and converts the boundary displacement / force into a loading instruction to drive the through core jack to realize thermal force coupling interactive loading; the T-shaped wind-fire coupling simulation system reproduces the real vehicle fire scene under the influence of the environmental wind. The test platform supports independent loading of any component of the cable system, can execute open space self-defined fire test and closed space standard fire test, and accurately analyzes the cable failure mode, critical temperature threshold and damage evolution law under fire through the multi-dimensional high-precision monitoring system, thereby providing a high-fidelity test platform and analysis method for fire resistance design of large-span bridges.

Embodiments relate to a flame barrier that may be adhered or mechanically fastened to a substrate to provide fire resistance and / or an outer protective surface. The flame barrier may alternatively be adhered or mechanically fastened to an existing flame barrier to provide increased fire resistance and / or increased protective ability. The flame barrier is configured to protect against high temperature flames, prevent flame penetration, and contain aggressive flames to reduce the severity of the flame's impact, heat, and velocity.

The invention discloses a high-temperature-resistant flame-retardant carbon fiber cable and an intelligent preparation method thereof, and relates to the technical field of power cables, and the cable is composed of a composite bearing core, a first / second electrical isolation belt, a stranded conductor, an annular composite bearing layer, a high-temperature-resistant main insulator and a low-smoke halogen-free outer sheath. The force bearing core is formed by bundling carbon fiber micro rods, elastic reset layers are arranged between the micro rods, micro-particle friction layers are formed on the outer surfaces of the micro rods, and a stable friction-rebound interface is constructed. A fire-resistant barrier, a phase change microcapsule filling layer and a fiber bragg grating can be arranged, and fire resistance, thermal peak suppression and on-line monitoring are considered. And closed-loop control of pultrusion, surface activation, coating and on-line thickness measurement / friction test is carried out in the manufacturing process. The cable can be operated at 200 DEG C for a long time and at 250 DEG C for a short time, the residual elongation is less than or equal to 0.10%, and light weight, high strength, high temperature resistance, low smoke and flame retardance are realized.

The invention discloses flame-retardant green concrete added with expandable graphite and a preparation method of the flame-retardant green concrete, and relates to the technical field of fireproof materials. The expansible graphite cement comprises the following components: cement, aggregate, expansible graphite and water, the mass ratio of the water to the cement is (0.4-0.5): 1, and the addition proportion of the expansible graphite is 1%-10% of the total weight of the cement. According to the expansible graphite flame-retardant concrete provided by the invention, the special material expansible graphite is utilized, the fireproof performance and the heat insulation performance of the concrete can be remarkably improved, and the expansible graphite forms a heat insulation layer through expansion in a high-temperature environment, so that concrete cracking or structural damage caused by a fire disaster is effectively prevented; and the fire resistance and the safety of the building structure are obviously improved. The simple and economical production process is designed, the proportion of the expansible graphite to other raw materials is properly adjusted, so that the production process of the concrete is environment-friendly and efficient, meanwhile, the production cost is effectively reduced, the requirements of modern green buildings are met, and wide application prospects are achieved.

The invention discloses a steel-wood composite heat insulation fireproof door, and relates to the technical field of fireproof doors. The steel-wood composite heat insulation fireproof door comprises a mounting frame structure, a fireproof door leaf structure is hinged to the inner side of the mounting frame structure, a protective observation window structure is arranged on the inner side of the fireproof door leaf structure, and a locking structure is arranged on the front side of the mounting frame structure. Through the arrangement of the fireproof door leaf structure and the combined design of the fireproof filling ceramsite layer, the fireproof perlite plate layer, the rock wool layer, the heat insulation cotton layer and the flame-retardant sealing layer in the fireproof door leaf structure, the strength and stability of the door body are enhanced, the heat insulation effect is remarkably improved, the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as inner layer materials, and the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as outer layer materials; the door body has excellent fire resistance and heat insulation performance, invasion of high-temperature flames and heat can be effectively blocked, the rock wool layer and the heat insulation cotton layer serve as middle layer materials, the heat insulation effect of the door body is further improved, and heat transfer is reduced.

The invention relates to the technical field of energy storage safety, and particularly discloses flame-retardant cooling liquid, a preparation method of the flame-retardant cooling liquid, an immersed energy storage device, a data center and electric equipment. According to the present invention, the base oil is at least one of the liquid halogenated alkane containing 2-6 carbon atoms, the liquid halogenated olefin, the liquid halogenated ketone and the liquid halogenated cycloalkane containing 3-6 carbon atoms, such that the high biodegradability of the base oil is maintained, the system viscosity is effectively reduced, the heat dissipation performance is improved, the insulating property of the base oil is significantly improved, and the service life of the base oil is prolonged. Meanwhile, the flame retardance is further enhanced. Therefore, the heat management efficiency of the cooling liquid is remarkably improved while environmental protection and safety are considered, and the cooling liquid has a good application prospect.

The utility model discloses a rapid identification and detection device for fireproof performance of building materials, which relates to the technical field of detection devices and comprises a detection box, moving wheels are mounted at the lower end of the detection box, an opening and closing box door is arranged on the front end face of the detection box, and a material table is arranged at the lower end of the inner side of the detection box. A bracket is fixedly mounted at the upper end of the material table, and an ignition head is arranged at the upper end of the inner side of the detection box. According to the rapid identification and detection device for the fireproof performance of the building material, the detection box, the protection shell, the treatment box and the like are arranged, the detection box is convenient to move through bottom moving wheels, a fuel barrel is installed in the top protection shell and provides fuel for detection and ignition, waste gas generated by combustion is treated through a waste gas treatment assembly in the treatment box, and the detection efficiency is improved. During detection, the device can be used only through an external power supply, is convenient to move, carries out rapid identification and detection on site, and improves the convenience.

To solve the problem in which a 3 mm thick, ultra-thin insulation material utilizing aerogel, the first of the technologies supporting this invention, is an excellent material that exhibits high thermal insulation effect upon installation in building walls, ceilings, or floors even when used alone, yet its limited strength restricted its applications.SOLUTION: By sandwiching an aerogel insulation material, whose limited strength previously restricted its applications, between two layers of reinforced corrugated cardboard to form a plywood material, strength, which had been the biggest challenge, is enhanced. Furthermore, combining the inherent properties of aerogel and reinforced corrugated cardboard creates a synergistic effect. This not only further strengthens thermal insulation but also, while maintaining lightweight characteristics, provides soundproofing, moisture resistance, shock absorption, fire resistance, and fireproofing, etc. This dramatically increases applicability and versatility as a material.SELECTED DRAWING: Figure 1

The invention provides a fire-resistant low-voltage wire cable and a preparation method thereof, and belongs to the technical field of wire cables, the fire-resistant low-voltage wire cable comprises an internal cable core bundle and an outer sheath, the outer sheath is prepared from the following raw materials: a resin matrix, a composite flame retardant, a reinforcing filler and an anti-aging agent, the reinforcing filler is a glass fiber composite porous organic framework, the organic framework material is pretreated by an acrylic polymer, and the composite flame retardant is prepared by taking expanded graphite as a shell of a flame-retardant material and then performing hydroxylation modification by using a silicon source material. The preparation process is simple and suitable for industrial production, the prepared electric wire and cable outer sheath is good in environment friendliness, and through the combined action of the composite flame retardant and the reinforcing filler, the prepared outer sheath material has excellent fire resistance and flame retardance while keeping high mechanical strength.

The invention relates to the technical field of cable manufacturing, and discloses a low-carbon environment-friendly low-voltage fireproof cable which sequentially comprises a cable core, a metal heat transfer layer, a ceramic halogen-free low-smoke heat insulation layer, a metal fire blocking layer and a halogen-free low-smoke outer sheath layer from inside to outside. The cable core comprises a plurality of insulating wire cores and a ceramic halogen-free low-smoke flame-retardant material filled in external gaps of the insulating wire cores, each insulating wire core sequentially comprises a conductor, a high-temperature-resistant mica layer and an insulating layer from inside to outside, the high-temperature-resistant mica layer is tightly coated on the surface of the conductor, and the insulating layer is coated on the surface of the insulating layer. The insulating layer is made of a ceramic silicone rubber material, and the ceramic halogen-free low-smoke flame-retardant material and the ceramic halogen-free low-smoke thermal insulation layer both contain inorganic filler capable of forming a ceramic hard shell at high temperature. According to the cable, by adopting a combined structure of the high-temperature-resistant mica layer and the ceramic silicone rubber insulating layer, the fireproof grade of the cable is improved.

The invention relates to a UHPC-based fabricated fire-fighting smoke exhaust fan room structure and a construction method thereof, the room structure comprises a main body structure, and the main body structure is prefabricated by adopting an ultra-high performance concrete UHPC material; a fan is arranged in the internal space of the main body structure; the main body structure is provided with a machine room enclosure bulkhead cylinder body and an end cover side wall. Wherein the machine room enclosure bulkhead cylinder body is provided with a bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are connected with the bottom plate and vertically arranged in parallel, and a first opening end and a second opening end which are oppositely arranged are arranged at the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction respectively; the end cover side wall is provided with a first end cover and a second end cover which are respectively arranged at the first opening end and the second opening end; the first end cover and the second end cover are each provided with a smoke suction and exhaust port, and the smoke suction and exhaust ports are used for being connected with a ventilation pipeline. The UHPC shell is adopted, the advantages of being high in strength and good in fire resistance are achieved, the prefabricated assembly type structure is adopted, construction is convenient, and efficiency is high.

The invention discloses handheld steel fireproof door fireproof performance in-situ nondestructive testing equipment and a use method, and belongs to the technical field of fireproof door fireproof performance determination. In order to solve the problems that an existing method lacks an effective in-situ nondestructive testing means and the actual fire resistance of a fireproof door in use cannot be accurately judged, handheld in-situ nondestructive testing equipment for the fire resistance of the steel fireproof door is designed, during testing, electric suction cups on the two sides of the equipment are adsorbed to the fireproof door, and a laser sensor rapidly measures the thickness of the fireproof door; the ultrasonic eddy-current sensor is used for measuring fireproof door steel plate thickness; the X-ray sensor is used for measuring the compactness of the fireproof door filling material by using the X-ray propagation time; and comparing the measured data with a qualified fireproof door to obtain the fireproof performance of the measured fireproof door. Compared with the original fireproof door sampling detection equipment and method, the equipment and method can realize portable in-situ nondestructive detection, quickly judge the performance of the fireproof door, prevent inferior products from entering the market and protect the property and life safety of people.

The invention relates to the technical field of thermal insulation materials, and discloses a thermal insulation material with fireproof and thermal insulation characteristics and a manufacturing method thereof, and the thermal insulation material is prepared by building a multi-layer gradient phase change thermal storage structure, forming a biomineralization inorganic skeleton, arranging a high-temperature activation self-repairing system and performing composite reinforcement on plant fibers and attapulgite. The fireproof time of the material is remarkably prolonged through a multi-protection mechanism, the self-repairing capability after a fire disaster is achieved, and the technical problems that a traditional fireproof heat-insulating material is insufficient in fire resistance, structural damage cannot be repaired, and a phase-change material is prone to loss are effectively solved; the material is especially suitable for high-fire-risk environments such as industrial plant firewalls, tunnel inner wall fireproof heat insulation layers and petrochemical equipment protection layers.

The utility model relates to the technical field of detection furnaces, in particular to a fireproof door detection furnace which not only facilitates feeding and discharging of a fireproof door and prevents the fireproof door from being difficult to discharge after deformation, but also performs dot-matrix detection on fire resistance of the fireproof door and can test weak positions of the fireproof door. Comprising a detection furnace; the device further comprises a detection mechanism, a moving mechanism, an incineration mechanism and a smoke exhaust mechanism, the detection mechanism is installed on the detection furnace and conducts dot-matrix detection on the fire resistance of the fireproof door, the moving mechanism is installed on the detection furnace and facilitates feeding and discharging of the fireproof door, and the incineration mechanism is installed on the detection furnace and conducts combustion on the fireproof door. The smoke discharging mechanism is installed on the incineration mechanism and pumps out smoke after detection is completed.

An ultra-stable structural laminate with fire resistance and a lateral nail pull strength from 44 to 300 pounds of force and an insulation R value from 1 to 40, the ultra-stable structural laminate of a cementitious material with a nano-molecular veneer and a foam component catalytically reacted into an expanded closed cell foam having a thickness from ⅛th inch to 8 inches, a density from 1.5 pounds / cubic foot to 3 pounds / cubic foot that self-adheres to the cementitious material forming an ultra-stable structural laminate with fire resistance and a lateral nail pull strength from 44 pounds to 300 pounds of force, an insulation R value from 1 to 40, a resistance to seismic impact for earthquakes over 3.1 on the Richter Scale, a break point from 7 lbs / inch to 100 lbs / inch; and a resistance to wind shear equivalent to a 15 mph downburst.

The invention relates to an assembly type integrated fire-fighting smoke exhaust fan room structure which comprises a machine room enclosure bulkhead cylinder body which is provided with a bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are connected with the bottom plate and vertically arranged in parallel, and the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction are provided with a first opening end and a second opening end which are oppositely arranged correspondingly; the end cover side wall is provided with a first end cover and a second end cover which are respectively arranged at the first opening end and the second opening end; smoke suction and exhaust ports are formed in the first end cover and the second end cover and are used for being connected with a ventilation pipeline; the machine room access door is arranged on the first side wall or the second side wall and can be opened and closed; the fan is arranged in an internal space formed by the machine room enclosure bulkhead cylinder body, the first end cover and the second end cover; the machine room enclosure bulkhead cylinder body, the first end cover, the second end cover and the machine room access door are all of a prefabricated concrete structure. The fabricated integrated design is adopted, the cost is low, the self weight is light, fireproof performance is achieved, and the advantages of being stable, reusable, attractive and the like are achieved.

The invention discloses a preparation method and application of a cable for a liquid-cooled high-power charging pile, belongs to the technical field of liquid-cooled cables, and aims to solve the technical problem that the flame retardance and fire resistance of a liquid-cooled cable in the prior art need to be further improved. The method comprises the following steps that a plurality of modified heat conduction pipes are spirally arranged on the surface of an insulating layer to obtain a heat exchange layer, the liquid-cooled cable has excellent fire resistance and flame retardance through the collaborative design of composite fiber cloth and the modified heat conduction pipes, glass fibers and a silicon-aluminum structure in the composite fiber cloth are decomposed at the high temperature, and the heat exchange layer is formed; the insulating layer is arranged on the insulating layer, a protective layer is formed, heat transfer and flame spreading are effectively blocked, the structural integrity of the heat conduction pipe is ensured, meanwhile, a cooling liquid circulating system rapidly takes away flame heat, the wire core layer and the insulating layer are further protected, and the secondary combustion phenomenon caused by leakage of organic cooling liquid is avoided.

The invention discloses a method and a system for detecting fireproof performance of an assembled insulation board, and relates to the technical field of fireproof material detection.The method comprises the following steps: preparing an assembled insulation board sample, and performing constant-temperature and constant-humidity balance and ultraviolet aging grouping treatment to obtain a standardized insulation board sample interface; scanning the interface of the standardized insulation board sample by using terahertz time-domain spectroscopy to generate an interface debonding distribution diagram and a defect coordinate list; ablating detection points of the fabricated insulation board sample through laser-induced breakdown spectroscopy to obtain plasma temperature, analyzing element migration data of the flame retardant, and calculating the residual rate of the flame retardant; inputting the interface debonding distribution diagram and the flame retardant residual rate into a coupling failure model, and judging a synergistic failure type of interface debonding and flame retardant attenuation; and generating a three-dimensional visualization scheme according to the synergistic failure type of flame retardation attenuation, and obtaining a process optimization report. According to the invention, through the process optimization report output by the three-dimensional risk field, the fire resistance of the insulation board in an extreme environment is improved.

The utility model discloses an insulated intensive bus duct, which comprises a device main body and a separation mechanism arranged in the device main body, the separation mechanism comprises placement bins, sealing plates arranged at two ends of the device main body and heat dissipation plates arranged in the placement bins, and a conductive plate is arranged in each placement bin. The placement bin is used for separately placing a plurality of current-conducting plates, and the heat dissipation plate is used for dispersing heat of the current-conducting plates; according to the utility model, if all the current-conducting plates are in contact, the temperature is further increased, so that a fire behavior is generated in the device main body, and when the plurality of current-conducting plates are separately placed, the influence on the current-conducting plates of other parts is very little when a fire behavior occurs in an independent part; and the placement bin can provide a layer of protection for the whole device main body, so that the fire resistance of the device main body can be improved, and meanwhile, the possibility of mutual power transmission can be reduced to the minimum by separately mounting the conductive plates.

The invention discloses a real-time mixed fire test method for a large-scale substructure of a bridge cable, and belongs to the technical field of bridge fire resistance test. A full bridge is divided into a physical test substructure and an LSTM numerical substructure, the numerical substructure is constructed based on multi-scale gating residual LSTM, and second-level high-precision prediction of the boundary force or displacement of a cable system in a fire disaster is achieved through a parallel multi-branch network, a dynamic feature selection gate and residual cross-layer connection. By combining an LSTM-PID intelligent control system, displacement / stress and a temperature field are converted into loading signals according to a prediction instruction, a time delay compensation mechanism is synchronously integrated, a center hole jack, a combustor and a fan are driven in real time, a non-uniform wind-fire coupling scene is reproduced, and a full-bridge three-dimensional visual fire response is formed. According to the method, the speed bottleneck of traditional finite element calculation is broken through, second-level thermal coupling interaction is achieved, and a high-precision and high-reliability test method and platform are provided for large-span bridge fire resistance design.

The invention relates to the technical field of structural engineering safety monitoring, in particular to a fire resistance real-time evaluation system and method based on a steel structure, and the method comprises the steps: collecting the surface radiation energy of the steel structure through a distributed thermal infrared imager array, and constructing a millimeter-level precision three-dimensional temperature field distribution diagram in combination with an environment temperature compensation algorithm; inputting the temperature field into the phase change correction model, and dynamically calculating a yield strength attenuation coefficient and an elastic modulus reduction coefficient; constructing a thermal-mechanical coupling nonlinear finite element model based on the degradation parameters, iteratively solving the displacement and stress response of the structure under the fire load action by adopting an arc length method, and extracting a buckling critical load spectrum; and according to the ratio of the real-time fire load to the critical load, a fire-resistant safety level signal is generated, and a graded early warning instruction is triggered. According to the invention, thermal-force response whole-process monitoring and intelligent early warning of the steel structure in a fire disaster can be realized, and the system has high spatial resolution, high physical coupling and multi-level response capability.

The invention discloses a flame-retardant, low-smoke and halogen-free environment-friendly high-voltage power cable, which relates to the technical field of high-voltage power cables and comprises a central conductor, the central conductor is externally coated with an internal insulation protection layer, and the outer side of the central conductor is sequentially coated with an insulation shielding layer, a waterproof silica gel isolation layer and an outer rubber protection layer. The outer side of the outer rubber protection layer is coated with a flexible deformation silica gel layer, the flame erosion and spreading process is intercepted through active falling of the flame-retardant rubber clamping pieces, heat is taken away in the falling process of the flame-retardant rubber clamping pieces, and a local fire insulation belt is formed; and meanwhile, in the subsequent maintenance process of the cable, corresponding fusing separation adhesive tapes and flame-retardant rubber cards need to be replaced to complete repair, so that the overall fireproof performance of the cable is improved, and the cable is protected in different degrees in different degrees of fire environments by utilizing a strategy of coping with fire disasters through layer-by-layer separation, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. And the maintenance cost of the cable is effectively reduced.

The invention discloses a large-diameter cable test model and a closed space fire resistance test method thereof.The model comprises a cable test model body composed of multiple cable strands, the size of the cable test model body is calculated through a set formula, the reduction proportion of the cable strands is consistent with that of the cable strands, and annular steel hoops are arranged at the two ends of the model body; a thermocouple is further pre-embedded in the model, the number of cable strands needing to be welded with the thermocouple is counted according to a preset target measuring point when the model is manufactured, and the thermocouple is welded to the surface of the cable strand measuring point; when the model is manufactured, the cable strands welded with the thermocouples are placed and positioned according to a preset sequence according to the measuring point positions, thermocouple wires are led out through cable strand gaps, and steel gaskets are additionally arranged on the surfaces, exposed out of the model, of the thermocouples to isolate flames; the surface of the model is provided with a fireproof anticorrosive coating, and the model is placed in a test furnace for a fire resistance test. According to the invention, the influence of the large-diameter cable on cable heat transfer and heat damage in different fire disasters, fire protection, fire time and the like is mainly researched, and the actual fire resistance of the fireproof material is verified.

The invention discloses a fire resistance testing device for a fireproof plugging material, and relates to the technical field of fire resistance testing equipment, the fire resistance testing device comprises a carrying frame capable of ascending and descending and a tray detachably connected with the carrying frame, a partition plate is arranged below the carrying frame, a fuel gas ignition seat is arranged below the partition plate, and when the carrying frame descends to abut against the partition plate, the fuel gas ignition seat is ignited. The tray penetrates through the partition plate and falls over the fuel gas ignition base. The first supporting strip and the second supporting strip can rotate synchronously, the first supporting strip and the second supporting strip are arranged on the same side of the carrying frame in parallel from front to back, and adjustable pressing strips are arranged on the first supporting strip and the second supporting strip. According to the invention, not only can the heat insulation property of the fireproof blocking material be detected, but also the integrity of the fireproof blocking material can be detected, the test process ensures the accuracy of the temperature sensor I and the temperature sensor II in implementing temperature rise monitoring work, and also ensures the accuracy of the infrared thermal imager I and the infrared thermal imager II in implementing regional temperature field change monitoring operation; and comprehensive and accurate detection operation can be implemented.

The invention discloses a light internal partition wall board and a preparation process thereof, and belongs to the technical field of building materials. The light internal partition wall board is prepared from the following main raw material components in parts by mass: 500 to 700 parts of slag washed sand, 1400 to 1600 parts of cement, 40 to 50 parts of flame-retardant light filler, 10 to 24 parts of flame retardant, 15 to 60 parts of air entraining agent, 8 to 24 parts of water reducing agent and 330 to 750 parts of water. Wherein the flame-retardant light filler is obtained by sequentially reacting expanded polystyrene particles with bis (pinacolato) diboron, 4-bromo-3-isopropyl benzoic acid and triisopropyl phenyl phosphate; the water reducing agent is prepared from polyvinyl alcohol; the prepared light internal partition wall board is high in compressive strength, good in fire resistance and light in mass.

The application relates to the technical field of fire-fighting cable detection, in particular to a fire-fighting cable detection device which comprises a box body, stretching cavities, first guide rods, a burner and a clamping mechanism. Stretching cavities are arranged on the left and right sides of the inner cavity of the box body. The number of the first guide rods is eight, and the eight first guide rods are arranged at the four corners of the inner cavities of the two stretching cavities. The burner is arranged at the bottom end of the inner cavity of the box body. The clamping mechanism is slidably sleeved on the outer wall of the first guide rod. The device can not only detect the fire resistance and flame retardance, but also simulate the damage of the object impact on the cable outer skin and internal structure in the fire scene. Meanwhile, the cable tension change in the fire scene is simulated and detected, the tension abnormality caused by factors such as thermal expansion and cold shrinkage and structure deformation is found in time, and problems such as internal conductor fracture, poor contact and outer skin rupture are prevented, so that the stable power transmission of the fire-fighting cable in the emergency such as fire is effectively ensured, and the normal operation of the fire-fighting equipment is ensured.

The invention discloses a halogen-free low-smoke flame-retardant polyolefin cable which comprises a composite cable core, a first flame-retardant wrapping tape layer, an inner sheath, a second flame-retardant wrapping tape layer, a waterproof layer, a metal sheath layer and an outer sheath which are sequentially arranged from inside to outside. The outer sheath is made of a ceramic polyolefin material which is extruded and covered on the metal sheath layer. According to the low-smoke halogen-free cable, the ceramic polyolefin outer sheath is introduced into the cable structure, so that the problems of sheath softening, insulating layer stripping, structure collapse and the like of a traditional low-smoke halogen-free cable during high-temperature combustion are effectively solved. The ceramic polyolefin material can be converted into a compact ceramic layer under the action of flame to form a firm heat insulation barrier, so that the integral structure of the cable is kept complete, flame spreading and conductor short circuit are prevented, and the fire resistance and continuous power supply performance are remarkably improved.