CN212107250U - Fireproof composite air pipe and smoke exhaust pipeline composed of same - Google Patents
Fireproof composite air pipe and smoke exhaust pipeline composed of same Download PDFInfo
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- CN212107250U CN212107250U CN202020196891.3U CN202020196891U CN212107250U CN 212107250 U CN212107250 U CN 212107250U CN 202020196891 U CN202020196891 U CN 202020196891U CN 212107250 U CN212107250 U CN 212107250U
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Abstract
The application provides compound tuber pipe of fire prevention, its cross sectional shape is the rectangle and includes the body that the multilayer is nested each other, and wherein the body of inlayer encloses by the PLASTIC LAMINATED that 5mm ~ 30mm is thick, and outermost body encloses by the galvanized steel sheet that 0.3mm ~ 0.8mm is thick, the length of rectangle is 120mm ~ 4500mm, the width of rectangle is 120mm ~ 4500mm, the inside of the body of inlayer is equipped with the annular reinforcing support frame that offsets rather than the inner peripheral surface. This application still provides a smoke exhaust pipe, including many that splice in proper order the compound tuber pipe of fire prevention, the length of the compound tuber pipe of each fire prevention is 2000mm, and the periphery cover is equipped with the pendant, connects through the aluminum alloy flange and the aluminum alloy cutting that inserts the aluminum alloy flange between the two adjacent compound tuber pipes of fire prevention. The application provides compound tuber pipe of fire prevention can satisfy the requirement about tuber pipe fire-resistant limit and anti-seismic performance in the national standard, and the cost is lower.
Description
Technical Field
The application relates to the technical field of ventilation, in particular to a fireproof composite air pipe and a smoke exhaust pipeline composed of the fireproof composite air pipe.
Background
The combustion performance refers to all physical and chemical changes generated when a material is combusted or meets fire, and the performance is measured by the characteristics of the ignitability, flame spreading property, heating, fuming, charring, weight loss, toxic product generation and the like of the surface of the material and is divided into combustible, nonflammable and non-combustible.
The limit of fire resistance is the time, expressed in hours, that a building element, fitting or structure takes from the time it is subjected to or used air to the time it loses its load-bearing capacity, integrity or thermal insulation under standard fire test conditions.
Thermal insulation refers to the ability of a building component to withstand a fire for a period of time without the temperature of the back-fire surface exceeding a specified limit under standard fire test conditions.
In summary, the fire endurance, thermal insulation and combustion performance of the duct are not necessarily linked.
1.1 regulations regarding duct Combustion Performance:
10.3.15 in the building fire code GB50016-2014(2018 edition) states: the air duct of the ventilation and air conditioning system should be made of non-combustible materials, except for the following cases: 1, the air pipe and the flexible joint which are contacted with corrosive media can adopt flame-retardant materials; 2 ventilation, air-conditioning system in big space buildings such as gymnasium, exhibition hall, waiting machine (car, ship) building (room), office building and class C, D, E factory building, when the tuber pipe sets up according to the fire prevention subregion and has set up smoke protection fire damper, can adopt the difficult combustible material that the combustion product toxicity is less and smoke density grade is less than or equal to 25. 10.3.16 specifies: the heat insulating material for the equipment and the air duct, the humidifying material for the humidifier, the sound-deadening material and the binder thereof are preferably noncombustible materials, and when there is difficulty, a noncombustible material having a low toxicity of combustion products and a smoke density grade of 50 or less may be used. When the electric heater is arranged in the air pipe, the switch of the electric heater and the start and stop of the fan are controlled in an interlocking manner. The wind pipes in the range of 0.8m in front of and behind the electric heater and the wind pipes penetrating the room which is easy to ignite, such as a fire source, are made of non-combustible materials.
3.3.7 and 4.47 in technical Standard of building Smoke protection and Smoke evacuation systems (GB51251-2017) stipulate: the pressurizing air supply pipeline and the smoke exhaust pipeline are made of non-combustible materials, and the inner walls of the pressurizing air supply pipeline and the smoke exhaust pipeline are smooth.
Therefore, the air ducts of ventilation and air-conditioning systems should be made of non-combustible materials, except for special conditions. The pressurizing air supply pipeline and the smoke exhaust pipeline are made of non-combustible materials, and the inner walls of the pressurizing air supply pipeline and the smoke exhaust pipeline are smooth.
1.2 regulations regarding the fire endurance of air ducts:
3.3.8 in technical Standard of building Smoke protection and Smoke evacuation systems (GB51251-2017) states: the arrangement and fire-resistance limits of the mechanical pressurized air supply duct should comply with the following regulations:
1, an air supply pipeline which is vertically arranged is independently arranged in a pipeline well, and when the difficulty exists, the air supply pipeline is not arranged in the pipeline well or shares the pipeline well with other pipelines, and the fire resistance limit of the air supply pipeline is not lower than 1.00 h;
2, the horizontally arranged air supply pipeline has the fire resistance limit not lower than 0.50h when arranged in a suspended ceiling; when not placed in a suspended ceiling, its fire endurance should not be below 1.00 h.
In the technical standard of building smoke prevention and exhaust system (GB51251-2017), the fire resistance limit of an 4.5.7 air supply pipeline is not less than 0.50h, and when the air supply pipeline crosses a fire-proof subarea, the fire resistance limit of the pipeline is not less than 1.50 h.
In the technical standard of building smoke prevention and exhaust system (GB51251-2017), 4.4.8 regulations: the smoke exhaust duct arrangement and fire limits should comply with the following regulations:
1 the smoke exhaust pipe and the connecting parts thereof should be capable of continuously ensuring the structural integrity of the smoke exhaust pipe for 30min at 280 ℃.
2 the smoke exhaust pipeline vertically arranged is arranged in an independent pipeline well, and the fire resistance limit of the smoke exhaust pipeline is not lower than 0.50 h.
3, the horizontally arranged smoke exhaust pipeline is arranged in the suspended ceiling, and the fire resistance limit of the smoke exhaust pipeline is not lower than 0.50 h; when there is no difficulty, it can be placed directly in the room, but the fire endurance of the pipe should not be less than 1.00 h.
4 the smoke exhaust pipeline is arranged in the suspended ceiling of the walkway part, and the smoke exhaust pipeline passes through the fireproof subarea, the fire resistance limit of the pipeline is not less than 1.00h, but the fire resistance limit of the smoke exhaust pipeline of the equipment room and the garage is not less than 0.50 h.
1.3 regulations on the heat-insulating performance of fire-fighting smoke-discharging air pipes:
the technical standard of building smoke prevention and exhaust system (GB51251-2017) states 4.4.9: when combustible materials are arranged in the suspended ceiling, the smoke exhaust pipeline in the suspended ceiling is insulated by adopting non-combustible materials, and the distance between the smoke exhaust pipeline and the combustible materials is not less than 150 mm.
4.4.9 in order to prevent the combustible substances in the suspended ceiling from being ignited by the high temperature of the smoke exhaust pipeline, the smoke exhaust air pipe arranged in the suspended ceiling is regulated to adopt heat insulation measures, for example, the smoke exhaust air pipe is coated with a material with certain fire resistance limit and keeps a distance of not less than 150mm with the combustible substances. Examples are: the heat insulating material is glass wool, the environment temperature is calculated to be 35 ℃, the smoke temperature is 280 ℃, and the surface heat release coefficient is calculated to be 8.141W/(m)2K), the results of the calculations are shown in table 1.
1.4 regulations on the seismic performance of air ducts:
5.1.1 stipulations in the building electromechanical engineering earthquake-resistant design Specification (GB 50981-2014): the materials for the heating, ventilation and air conditioning ducts should be selected to meet the following specifications:
1 the heating and air-conditioning water pipelines are selected to meet the following regulations:
(1) the multi-storey buildings in the areas of 8 degrees and below 8 degrees can be selected according to the materials specified by the current relevant standards of China;
(2) hot galvanized steel pipes, stainless steel pipes and copper pipes are adopted in high-rise buildings and buildings in 9-degree areas, and the connection mode can be pipe connection or welding;
2, the pipe of the ventilation and air conditioning air duct can be selected according to the material regulated by the current relevant standards of China;
3 the selection of the smoke exhaust air duct, the smoke exhaust air supplementing air duct, the pressurized air supply and the accident ventilation air duct meets the following regulations:
(1) the multi-storey buildings in the areas of 8 degrees and below 8 degrees are preferably made of galvanized steel plates or steel plates;
(2) high-rise buildings and buildings in 9-degree regions are made of hot-dip galvanized steel plates or steel plates.
In summary, the pipe material of the ventilation and air conditioning air duct should be made of non-combustible material, and the heat insulation material should be made of non-combustible material. The pressurized air supply pipeline, the fire-fighting air supply pipe and the smoke exhaust pipeline are made of non-combustible materials, the inner walls of the pressurized air supply pipeline, the fire-fighting air supply pipe and the smoke exhaust pipeline are smooth, the multi-storey buildings in the areas with the temperature of 8 ℃ and below 8 ℃ are preferably made of galvanized steel plates or steel plates, the high-rise buildings and the buildings in the areas with the temperature of 9 ℃ are made of hot galvanized steel plates or steel plates, the requirements of the fire resistance limit specified by corresponding national regulations are met, and the smoke exhaust prevention pipeline also needs to.
1.5 the existing air duct method:
(1) the method for wrapping the galvanized steel sheet with the fireproof plate comprises the following steps:
the air duct is made of galvanized steel sheet, and the thickness of the air duct is selected according to the requirement of 4.2.3-1 in the Specification for construction quality inspection and acceptance of Ventilation and air-Conditioning engineering GB 50243-2016. When the tuber pipe is according to in the furred ceiling space, the first outsourcing of tuber pipe is cotton 30 ~ 100 mm's centrifugal inorganic glass, wraps the PLASTIC LAMINATED again at last, and the PLASTIC LAMINATED can satisfy fire resistance limit. When the air pipe is in the non-suspended ceiling space, the fire-proof plate is wrapped outside the air pipe, and the fire-proof plate can meet the fire-proof limit.
The method for wrapping the fireproof plate outside the galvanized steel plate has the advantages that all requirements of the air pipe except the fireproof limit in the specification are met, but the air pipe wrapped with the fireproof plate outside the galvanized steel plate cannot integrally obtain the inspection report of the national fireproof building material quality supervision and inspection center, and only can obtain the inspection report of the fireproof and fireproof limit, so that the construction process is complex in the using process, and certain risks exist.
(2) The method for spraying the fireproof coating outside the galvanized steel sheet comprises the following steps:
the air pipe is a galvanized steel plate air pipe, the thickness of the air pipe is selected according to the requirement of 4.2.3-1 in the specification GB50243-2016 of ventilation and air conditioning engineering construction quality acceptance, and when the air pipe is in a non-suspended ceiling space, the fireproof coating is sprayed outside the air pipe and can meet the fire resistance limit.
The galvanized steel sheet is externally sprayed with the fireproof coating, so that the construction difficulty is very high, and the fireproof coating is extremely difficult to attach and is easy to fall off due to the fact that the galvanized steel sheet air pipe is too thin and has a galvanized layer. And the fire-proof detection report of the fire-proof coating can be obtained, and the whole air pipe can not obtain the detection report of the national fire-proof building material quality supervision and inspection center.
(3) The method for manufacturing the double-sided color steel plate sandwich inorganic glass wool air duct comprises the following steps:
the thickness of the inner wall of the double-sided color steel plate clamp inorganic glass wool air duct is selected according to the requirement of 4.2.3-1 in the specification GB50243-2016 of ventilation and air conditioning engineering construction quality acceptance standard, the thickness of the sandwich glass wool is 30-50 mm of centrifugal glass wool, and the outer wall of the air duct is selected from a galvanized steel plate with the thickness not lower than 0.3 mm.
The double-sided color steel plate sandwich inorganic glass wool air duct has the advantages that the factory field finished product processing can be realized, the quality is ensured, the field construction process is simple, the inspection report of the national fireproof building material quality supervision inspection center can be obtained, but the double-sided color steel plate sandwich inorganic glass wool air duct is extremely expensive.
SUMMERY OF THE UTILITY MODEL
The application provides a compound tuber pipe of fire prevention can satisfy the requirement about tuber pipe fire-resistant limit and anti-seismic performance in the national standard, and the cost is lower.
The application provides a compound tuber pipe of fire prevention's cross sectional shape is the rectangle and includes the body that the multilayer is nested each other, and wherein the body of inlayer encloses by the PLASTIC LAMINATED that 5mm ~ 30mm is thick, and outermost body encloses by the galvanized steel sheet that 0.3mm ~ 0.8mm is thick, the length of rectangle is 120mm ~ 4500mm, the width of rectangle is 120mm ~ 4500mm, the inside of the body of inlayer is equipped with the annular reinforcing support frame that offsets rather than the inner peripheral surface.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Optionally, the fire-proof plate is a fire-proof plate without halogen return.
Optionally, the thickness of the fireproof plate is 4-20 mm.
Optionally, the thickness of the galvanized steel plate is 0.2-1.5 mm.
Optionally, the reinforcing support frame is an annular welded square tube with the thickness of 10-40 mm multiplied by 10-40 mm.
Optionally, the shape of the outer periphery of the innermost pipe body is 4500mm × 200mm rectangular.
Optionally, a thermal insulation material is at least partially disposed between the innermost tubular body and the outermost tubular body.
Optionally, the heat insulation material is made of a non-combustible material.
Optionally, the periphery of the fireproof composite air pipe is provided with angle steels which are fixed with the edges of the rectangle through rivets.
This application still provides a smoke exhaust pipe, smoke exhaust pipe is including the many tuber pipes of concatenation in proper order, many tuber pipes adopt the compound tuber pipe of fire prevention, the length of each compound tuber pipe of fire prevention is 2000mm, and the periphery cover is equipped with the pendant, connects through the aluminum alloy flange and the aluminum alloy cutting that inserts the aluminum alloy flange between the two adjacent compound tuber pipes of fire prevention.
The application provides a compound tuber pipe of fire prevention and smoke exhaust pipe have one of following advantage at least:
(1) the one-step molding processing and manufacturing in a factory, the on-site rapid assembly and the like, and the on-site construction process is simple and the quality is controllable.
(2) The cost is far lower than that of a double-sided color steel plate sandwich inorganic glass wool air duct.
(3) The steel-faced magnesium composite air pipe adopts a fire-proof plate without halogen return, and is not easy to corrode metal components of the air pipe.
(4) The production of the steel-faced magnesium composite air pipe does not cause pollution to the environment, and is a novel environment-friendly material.
Drawings
FIG. 1 is a schematic view of an embodiment of a fireproof composite air duct;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural view of a smoke exhaust duct according to an embodiment;
FIG. 4 is a schematic diagram showing the structure of the tube A in the test piece according to an embodiment;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic view showing the structure of a tube B in a test piece according to an embodiment;
fig. 7 is a side view of fig. 6.
The reference numerals in the figures are illustrated as follows:
1. a fire-proof plate; 2. a galvanized steel sheet; 3. a thermal insulation material; 4. angle steel; 5. a hanger; 6. an aluminum alloy flange; 7. aluminum alloy cutting; 8. a T-shaped branch pipe; 9. and (4) opening.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In one embodiment, as shown in fig. 1, the fire-proof composite air duct has a rectangular cross-sectional shape and includes a plurality of layers of mutually nested ducts, wherein an innermost duct is surrounded by a fire-proof plate 1 having a thickness of 5mm to 30mm, an outermost duct is surrounded by a galvanized steel plate 2 having a thickness of 0.3mm to 0.8mm, a length of the rectangle (i.e., a length of a line segment L in fig. 1) is 120mm to 4500mm, a width of the rectangle (i.e., a length of a line segment W in fig. 1) is 120mm to 4500mm, and an annular reinforcing support frame (not shown in the figure) is provided inside the innermost duct and abuts against an inner peripheral surface thereof.
The fire endurance of the fire-proof composite air pipe in the embodiment is mainly realized by the fireproof plate 1, and the fireproof plate 1 has certain heat insulation performance and structural strength. In order to improve the bearing capacity of the air duct in a fire environment, a reinforcing support frame is arranged inside the innermost pipe body to provide further support for the fireproof plate. Along the length direction of tuber pipe, strengthen the carriage and can be the interval arrangement, compare with the metal inside lining of arranging in succession, strengthen the carriage and more can effectually prevent that each PLASTIC LAMINATED 1 from collapsing to the body is inside in high temperature environment, reinforcing tuber pipe fire endurance and anti-seismic performance. Because strengthen the bearing capacity that the carriage shared PLASTIC LAMINATED 1, the thickness of PLASTIC LAMINATED 1 can corresponding attenuate to reduce the cost of the compound tuber pipe of preventing fires, for example, the thickness of the fire-proof plate is 3mm ~ 30mm, and the length of the compound tuber pipe periphery rectangle of preventing fires is no longer than 4500mm, and the width is no longer than 400 mm. The galvanized steel sheet 2 at the outermost layer can prevent open fire from directly contacting the fireproof plate and plays a certain decorative role.
In order to extend the life of the fire-resistant composite air duct in normal use environments, in one embodiment, the fire-resistant panel is a halogen-free fire-resistant panel, such as a halogen-free glass magnesium fire-resistant panel. Through selecting for use not to return steamed material, can greatly alleviate the corrosion of PLASTIC LAMINATED to the enhancement carriage of inboard and the galvanized steel sheet in the outside, prolong the life of fire prevention composite air pipe.
The fire resistance limit and the manufacturing cost of the fireproof composite air pipe are comprehensively considered, and in one embodiment, the thickness of the fireproof plate is 4-20 mm. The thickness of the galvanized steel plate is 0.2-1.5 mm. The outer peripheral shape of the innermost pipe body is 4500mm × 200mm rectangular. Specifically, in another embodiment, the thickness of the fireproof plate is 14 mm. The thickness of the galvanized steel plate is 0.5 mm. The periphery of the innermost pipe body is in a rectangular shape of 1000mm multiplied by 500 mm.
In order to further reduce the manufacturing cost of the fireproof composite air pipe and ensure the structural strength of the fireproof composite air pipe, in one embodiment, the reinforcing support frame is an annular shape formed by welding square pipes of 10-40 mm multiplied by 10-40 mm. The cross-sectional shape of square pipe is square, and its global is enclosed by four planar area, can increase the area of contact of strengthening carriage and PLASTIC LAMINATED, improves the structural stability of the compound tuber pipe of fire prevention. The reinforcing support frame and the fireproof plate can be fixed by bonding, and limiting parts inserted into the fireproof plate can be arranged on two sides of the reinforcing support frame.
In one embodiment, as shown in fig. 1, an insulating material 3 is provided at least partially between the innermost tubular body and the outermost tubular body. The temperature rise of the fireproof plate 1 can be delayed through the heat insulating material 3, and the fire resistance limit of the fireproof composite air pipe is further improved.
Further, in order to ensure the structural strength of the fireproof composite air duct in a high-temperature environment, in one embodiment, the heat insulation material is made of a non-combustible material.
In order to further improve the bearing performance of the fireproof composite air duct, in an embodiment, as shown in fig. 2 (galvanized steel plate is omitted in the figure), angle steel 4 fixed with each corner of the rectangle through rivets is arranged on the periphery of the fireproof composite air duct. The angle steel 4 can prevent the fireproof composite air duct from collapsing downwards in a fire environment.
In an embodiment, as shown in fig. 3, this application still provides a smoke exhaust pipe, smoke exhaust pipe is including the many tuber pipes of concatenation in proper order, many tuber pipes adopt the compound tuber pipe of fire prevention, and the length of each compound tuber pipe of fire prevention is 2000mm, and the periphery cover is equipped with hanger 5, connects through aluminum alloy flange 6 and the aluminum alloy gib 7 that inserts the aluminum alloy flange between the two adjacent compound tuber pipes of fire prevention. In one embodiment, the aluminum alloy flanges 6 are aluminum alloy bridge-cut flanges, a refractory sealing gasket is clamped between the two aluminum alloy flanges 6, and the aluminum alloy inserting strips are embedded into the aluminum alloy flanges through rivets.
For the test to an embodiment of the fire-proof composite air pipe of this application, the test piece for testing comprises two sets of air pipe. As shown in fig. 4 and 5, the pipeline a is formed by splicing three 2000mm × 1029mm × 529mm air ducts; as shown in figures 6 and 7, the pipeline B is formed by splicing three sections of 2000mm by 1029mm by 279mm air pipes. The total wall thickness of the air pipe is 14.5mm, wherein the thickness of the fireproof plate is 14mm, and the thickness of the galvanized steel plate is 0.5 mm. (inner opening length L of tube A)AIs 1000mm, and the width W of the inner opening of the tube AAIs 500mm, and the length L of the inner opening of the B tubeBIs 1000mm, and the width W of the inner opening of the tube BB250 mm). The middle part of the inner wall of the air pipe is provided with a supporting piece which is reinforced by a square pipe with the size of 40mm multiplied by 40mm and welded with a # -shaped frame. An aluminum alloy flange is arranged between the air pipes, and the flange joint is directly connected and fixed by an aluminum alloy inserting strip. A T-shaped branch pipe 8 is arranged at the position 500mm away from the fire receiving end of the pipeline A, the section of the T-shaped branch pipe is 250mm multiplied by 250mm, and the length of the T-shaped branch pipe is 100 mm; two openings 9 are reserved on the two side surfaces of the pipeline B500 mm away from the fire receiving end, and the opening size is 500mm multiplied by 125 mm. During a fire resistance test, the air pipes A and B are horizontally arranged on two sides of a furnace door of the vertical combustion furnace, a furnace door supporting structure is a brick wall with the thickness of 240mm, and the fire length of the air pipes in the furnace is 3000 mm.
The test results are as follows: the fire endurance of the test piece is 2-3 hours.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The fireproof composite air pipe is characterized in that the section of the fireproof composite air pipe is rectangular and comprises a plurality of layers of pipe bodies which are mutually nested, wherein the pipe body at the innermost layer is formed by surrounding a fireproof plate with the thickness of 5-30 mm, the pipe body at the outermost layer is formed by surrounding galvanized steel plates with the thickness of 0.3-0.8 mm, the length of the rectangle is 120-4500 mm, the width of the rectangle is 120-4500 mm, and an annular reinforcing support frame which is abutted to the inner peripheral surface of the pipe body at the innermost layer is arranged inside the pipe body at the innermost layer.
2. The fire resistant composite air duct of claim 1, wherein the fire retardant panel is a halogen-free fire retardant panel.
3. The fireproof composite air pipe according to claim 1, wherein the thickness of the fireproof plate is 4-20 mm.
4. The fireproof composite air pipe according to claim 1, wherein the galvanized steel plate has a thickness of 0.2-1.5 mm.
5. The fireproof composite air pipe according to claim 1, wherein the reinforcing support frame is an annular shape formed by welding 10-40 mm x 10-40 mm square pipes.
6. The fire resistant composite air duct of claim 1, wherein the innermost duct body has a rectangular perimeter shape of 4500mm x 200 mm.
7. The fire resistant composite air duct of claim 1, wherein insulation is disposed at least partially between the innermost and outermost duct bodies.
8. The fire protection composite air duct of claim 7, wherein the thermal insulation material is a non-combustible material.
9. The fire-proof composite air pipe according to claim 1, wherein the periphery of the fire-proof composite air pipe is provided with angle steels which are fixed with the edges of the rectangle through rivets respectively.
10. The smoke exhaust pipeline comprises a plurality of air pipes which are sequentially spliced, and is characterized in that the air pipes adopt the fireproof composite air pipes according to any one of claims 1-9, the length of each fireproof composite air pipe is 2000mm, a hanging piece is sleeved on the periphery of each fireproof composite air pipe, and two adjacent fireproof composite air pipes are connected through an aluminum alloy flange and an aluminum alloy inserting strip inserted into the aluminum alloy flange.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115365469A (en) * | 2022-08-03 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | Rectangular-section thin-wall air duct with stable structure and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115365469A (en) * | 2022-08-03 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | Rectangular-section thin-wall air duct with stable structure and manufacturing method thereof |
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