阅读说明：本技术 一种风管的防火包覆结构 (Fire prevention clad structure of tuber pipe ) 是由 郭建辉 许达 王飞 门书卉 吴智刚 关晓波 冯晶 张云东 于 2021-09-18 设计创作，主要内容包括：本申请涉及一种风管的防火包覆结构,涉及风管领域,其包括风管本体,风管本体外从内向外依次套设有第一硅布层、第一纤维毯层、第二纤维毯层及第二硅布层四个层结构,层结构间设有胶粘剂。发生火情时,外部火焰及含有腐蚀能力的融化物等与具有较强抗腐蚀能力及耐火完整性的第二硅布层接触,在第二纤维毯层及第一纤维毯层较强的抗燃烧能力下,包覆结构不易发生燃烧,火焰不易损坏风管本体；同时层结构均为柔性材质且用胶粘剂及防火密封胶进行连接,未损坏风管本体的气密性,且抗辐照能力强,不易发生剥落、裂缝、粉化等现象。本申请提高了风管在核岛复杂环境下的防火能力。(The utility model relates to a fire prevention cladding structure of tuber pipe relates to the tuber pipe field, and it includes the tuber pipe body, and this external cover of tuber pipe is equipped with four layer structures on first silicon cloth layer, first fibre blanket layer, second fibre blanket layer and the second silicon cloth layer from inside to outside in proper order, is equipped with the adhesive between the layer structure. When fire occurs, external flame, a melt containing corrosion capability and the like are in contact with the second silicon cloth layer with stronger corrosion resistance and fire-resistant integrity, the coating structure is not easy to burn under the stronger anti-burning capability of the second fiber blanket layer and the first fiber blanket layer, and the flame is not easy to damage the air pipe body; meanwhile, the layer structure is made of flexible materials and is connected by the adhesive and the fireproof sealant, the air tightness of the air pipe body is not damaged, the irradiation resistance is high, and the phenomena of peeling, cracking, pulverization and the like are not easy to occur. The application improves the fire-proof capability of the air pipe under the complex environment of the nuclear island.)

1. The utility model provides a fire prevention cladding structure of tuber pipe, includes tuber pipe body (1), its characterized in that: the air pipe body (1) is externally provided with four layer structures including a first silicon cloth layer (21), a first fiber blanket layer (22), a second fiber blanket layer (23) and a second silicon cloth layer (24) in sequence from inside to outside, an adhesive (3) is arranged between the first silicon cloth layer (21) and the first fiber blanket layer (22) and between the first fiber blanket layer (22) and the second fiber blanket layer (23), and fireproof sealant (4) is arranged at the lap joint of the end parts of the layer structures.

2. The fire-retardant covering structure for an air duct of claim 1, wherein: the second fiber blanket layer (23) and the second silicon cloth layer (24) are movably connected.

3. The fire-retardant covering structure for an air duct of claim 1, wherein: second silicon cloth layer (24) are equipped with a plurality of first steel ribbons (5) outward along tuber pipe body (1) length direction, and first steel ribbon (5) all set up along the cross-section of tuber pipe body (1).

4. The fire-retardant covering structure for an air duct of claim 1, wherein: and a plurality of second steel binding belts (6) are arranged outside the second fiber blanket layer (23) along the length direction of the air pipe body (1), and the second steel binding belts (6) are arranged along the cross section of the air pipe body (1).

5. The fire-retardant covering structure for an air duct of claim 1, wherein: the air duct comprises a duct body (1) and is characterized in that four layer structures of a first silicon cloth layer (21), a first fiber blanket layer (22), a second fiber blanket layer (23) and a second silicon cloth layer (24) are a group of layer structures, and at least one group of layer structures is sleeved outside the duct body (1).

6. The fire-retardant covering structure for an air duct of claim 1, wherein: the side, close to each other, of the first silicon cloth layer (21) and the first fiber blanket layer (22) and the side, close to each other, of the first fiber blanket layer (22) and the second fiber blanket layer (23) are respectively provided with a plurality of grooves (82) and protrusions (81) which are matched with each other.

7. The fire-retardant covering structure for an air duct of claim 1, wherein: the end parts of the first fiber blanket layer (22) and the second fiber blanket layer (23) are fixedly provided with bosses (9), the bosses (9) at the two ends of the same layer structure are respectively positioned at the two sides of the corresponding layer structure, and the thickness of each boss (9) is half of the thickness of the corresponding layer structure.

8. The fire-retardant covering structure for an air duct of claim 7, wherein: one side of the lug bosses (9) of the same layer structure, which are close to each other, is provided with toothed connecting blocks (10) which are meshed with each other.

9. The fire-retardant covering structure for an air duct of claim 1, wherein: a plurality of third steel cable ties (7) are wound outside the first fiber blanket layer (22), and the third steel cable ties (7) are arranged along the section of the air pipe body (1).

Technical Field

The invention relates to the field of air pipes, in particular to a fireproof cladding structure of an air pipe.

Background

The air pipe enables an important component of a passive fire protection system of the nuclear power station, fuel used by the nuclear power station has great radioactivity, and once a fire disaster occurs in the nuclear power station, huge economic loss can be caused. Therefore, the air pipe of the nuclear power station for performing the functions of fire prevention and smoke exhaust needs to ensure that the ventilation function is normally performed when a fire disaster occurs, so that the flame spreading speed is reduced.

In most nuclear power projects in China at present, as the nuclear power station is a commercial reactor type imported from foreign countries, the fire-fighting design of the nuclear power station follows the fire-fighting design specification of the nuclear island imported country, and therefore in the field of fire-fighting package of air pipes, manufacturers of the imported country mostly provide matching materials; for example, the fireproof package of the typhoon nuclear power air duct is provided by NUVIA company in France, and the fireproof package materials of the unit air ducts of No. 3 and No. 4 in the urban area are provided by 3M company in the United states.

Aiming at the related technologies, the inventor thinks that with the use of nuclear reactors independently researched and developed in China such as Hualong I, higher requirements are put forward on the national production rate of nuclear island matching materials, the domestic similar type wind pipe fireproof structure is mostly used in the civil building market at present, the fireproof is realized by using rock wool or other inorganic fiber products, the structure is hard and easy to crack and pulverize, and the fireproof performance is poorer in the complex nuclear island environment.

Disclosure of Invention

In order to improve the fire-resistant capability of tuber pipe under the nuclear island environment, this application provides a fire prevention cladding structure of tuber pipe.

The application provides a fire prevention cladding structure of tuber pipe adopts following technical scheme:

the utility model provides a fire prevention cladding structure of tuber pipe, includes the tuber pipe body, the tuber pipe body is outer from inside to outside in proper order the cover be equipped with four layer structures on first silicon cloth layer, first fibre blanket layer, second fibre blanket layer and second silicon cloth layer, all is equipped with the adhesive between first silicon cloth layer and the first fibre blanket layer, between first fibre blanket layer and the second fibre blanket layer, and the tip overlap joint department of layer structure all is equipped with fire prevention sealed glue.

By adopting the technical scheme, when a fire occurs, external flame, a melt containing corrosion capacity and the like are in contact with the second silicon cloth layer with stronger corrosion resistance and fire-resistant integrity, the coating structure is not easy to burn under the stronger anti-burning capacity of the second fiber blanket layer and the first fiber blanket layer, and the flame is not easy to damage the air pipe body, so that the normal ventilation capacity is ensured; meanwhile, the layer structure is made of flexible materials and is connected with the adhesive and the fireproof sealant, the air tightness of the air pipe body is not damaged, the high-temperature gas in the air pipe is not easy to cause the coating structure to be damaged from the inside under the action of the first silicon cloth layer, the irradiation resistance is high, the phenomena of peeling, cracking, pulverization and the like are not easy to occur, and the fireproof capacity under the complex environment of the nuclear island is further improved.

Optionally, the second fiber blanket layer and the second silicon cloth layer are movably connected.

Through adopting above-mentioned technical scheme, certain relative motion can take place between second fibre blanket layer and the second silicon cloth layer, and when the condition of a fire takes place, be difficult for causing the tearing of second silicon cloth layer to influence fire-proof capability because of collision etc..

Optionally, a plurality of first steel ribbons are arranged outside the second silicon cloth layer along the length direction of the air pipe body, and the first steel ribbons are arranged along the section of the air pipe body.

Through adopting above-mentioned technical scheme, first steel ribbon carries on spacingly from different positions to second silicon cloth layer, and the difficult length direction who follows the tuber pipe body of second silicon cloth layer takes place great displacement and leads to tearing, is favorable to ensureing the fire behavior.

Optionally, a plurality of second steel cable ties are arranged outside the second fiber blanket layer along the length direction of the air pipe body, and the second steel cable ties are arranged along the section of the air pipe body.

Through adopting above-mentioned technical scheme, the second steel ribbon is fixed second fibrous layer and the layer structure that is close to tuber pipe body direction, under the condition of conflagration and great vibrations, fixed mode is still effective, and compares and need not pierce through the tuber pipe body in the bolt fastening, has ensured the gas tightness of tuber pipe body.

Optionally, the four layer structures of the first silicon cloth layer, the first fiber blanket layer, the second fiber blanket layer and the second silicon cloth layer are a group of layer structures, and at least one group of layer structures is sleeved outside the air duct body.

Through adopting above-mentioned technical scheme, the user can select to wrap multiunit layer structure outside the tuber pipe body according to the application scene of difference to satisfy the needs of fire behavior.

Optionally, a plurality of mutually-matched grooves and protrusions are respectively arranged on the mutually-close side of the first silicon cloth layer and the first fiber blanket layer, and the mutually-close side of the first fiber blanket layer and the second fiber blanket layer.

Through adopting above-mentioned technical scheme, in some protruding embedding recesses, be favorable to increasing the active area of adhesive, and then strengthened the connection effect between the adjacent layer structure.

Optionally, the end portions of the first fiber blanket layer and the second fiber blanket layer are both fixedly provided with bosses, the bosses at the two ends of the same layer structure are respectively located at the two sides of the corresponding layer structure, and the thickness of each boss is half of the thickness of the corresponding layer structure.

Through adopting above-mentioned technical scheme, the boss at same layer structure both ends overlaps the overlap joint, and the thickness after the overlap joint is the same with the thickness that corresponds the layer structure, and the layer structure is difficult for producing the gap in lap joint fluctuation, and the boss has increased the sealed area of acting of gluing of corresponding layer structure lap joint fire prevention simultaneously, and then has improved the connection effect of same layer structure lap joint.

Optionally, one side of the boss, which is close to each other, of the same layer structure is provided with toothed connecting blocks which are meshed with each other.

Through adopting above-mentioned technical scheme, the user utilizes the boss will correspond the both ends overlap joint back of layer structure, and the sealed effect area of gluing of further increase fire prevention has improved the lap-joint department tensile ability simultaneously, and the layer structure that corresponds is difficult for droing, and then has improved the fire behavior of tuber pipe body with the dentate connecting block intermeshing of layer structure.

Optionally, first fibre blanket twines outward and is equipped with a plurality of third steel ribbons, and the third steel ribbon all sets up along the cross-section of tuber pipe body.

Through adopting above-mentioned technical scheme, the first steel ribbon of third steel ribbon cooperation and second steel ribbon carry on spacingly in different positions layer structure, and further barrier layer structure is difficult for droing, is favorable to increase of service life, ensures the fire behavior of tuber pipe body.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the four-layer structure and the adhesive, when a fire occurs, external flame, a melt containing corrosion capability and the like are in contact with the second silicon cloth layer with strong corrosion resistance and fire-resistant integrity, the coating structure is not easy to burn under the strong anti-burning capability of the second fiber blanket layer and the first fiber blanket layer, and the flame is not easy to damage the air duct body, so that the normal ventilation capability is ensured; meanwhile, the layer structures are made of flexible materials and are connected by using an adhesive and a fireproof sealant, the air tightness of the air duct body is not damaged, and the high-temperature gas in the air duct is not easy to cause the coating structure to be damaged from the inside under the action of the first silicon cloth layer, and the coating structure is strong in irradiation resistance and not easy to peel, crack, pulverize and the like, so that the fireproof capacity in the complex environment of the nuclear island is improved;

through the arrangement of the second steel binding belt, the second fiber layer and the layer structure of the second fiber layer close to the direction of the air pipe body are fixed by the second steel binding belt, so that the fixing mode is still effective under the conditions of fire and large vibration, and compared with bolt fixing, the air pipe body is not required to penetrate through, and the air tightness of the air pipe body is guaranteed;

through setting up the boss, the overlap joint is overlapped to the boss at same layer structure both ends, and the thickness after the overlap joint is the same with the thickness that corresponds the layer structure, and the layer structure is difficult for producing the gap in lap joint fluctuation, and the boss has increased the sealed area of gluing of corresponding layer structure lap joint fire prevention simultaneously, and then has improved the connection effect of same layer structure lap joint.

Drawings

Fig. 1 is a schematic view of the overall structure of a fire-proof covering structure of an air duct.

FIG. 2 is a schematic partial cross-sectional view for highlighting the positions of the fire-retardant sealant, the protrusions, the grooves, the bosses and the toothed connecting blocks.

Description of reference numerals: 1. an air duct body; 21. a first silicon cloth layer; 22. a first fibrous blanket layer; 23. a second fibrous blanket layer; 24. a second silicon cloth layer; 3. an adhesive; 4. fireproof sealant; 5. a first steel tie; 6. a second steel tie; 7. a third steel tie; 81. a protrusion; 82. a groove; 9. a boss; 10. tooth-shaped connecting blocks.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses fire prevention cladding structure of tuber pipe.

Referring to fig. 1, a fire-proof coating structure of an air duct comprises an air duct body 1, wherein the air duct body 1 is in a rectangular tube shape and is arranged above the indoor space, a group of layer structures is sleeved outside the air duct body 1, each group of layer structures comprises four layer structures, namely a first silicon cloth layer 21, a first fiber blanket layer 22, a second fiber blanket layer 23 and a second silicon cloth layer 24, which are sequentially arranged from inside to outside, and the layer structures are coated outside the air duct body 1 to protect the air duct; the user can be according to application condition installation multiunit layer structure outside tuber pipe body 1, and then ensures tuber pipe body 1 ventilation ability under the conflagration.

Referring to fig. 1, the first silicon cloth layer 21 and the second silicon cloth layer 24 are made of the same material, and both adopt JSF-1000 silicon cloth, which is flexible cloth with strong wear resistance, corrosion resistance, and high and low temperature resistance; during installation, the first silicon cloth layer 21 is directly wound on the outer wall of the air pipe body 1, and after the air pipe body is wound for 1 circle, the two ends of the first silicon cloth layer 21 are in staggered lap joint with a certain length.

Referring to fig. 1 and 2, the fireproof sealant 4 is disposed at the overlapping position of the end portions, and a user applies the fireproof sealant 4 to one side of the overlapping position of the two ends, which is close to each other, to connect the two ends of the first silicon fabric layer 21. When the conflagration takes place, through impurity such as a large amount of high-temperature gas and mars in the tuber pipe body 1, tuber pipe body 1 sharply heaies up, and the difficult burning that takes place of first silicon cloth layer 21, and then plays the guard action to tuber pipe body 1.

Referring to fig. 1, an adhesive 3 is arranged between the layer structures, the adhesive 3 is a JCF-100 adhesive, and can be quickly cured at room temperature, so that the adhesive effect is good, and the adhesive still has strong adhesive capacity at high temperature; the user applies the adhesive 3 on the surface of the first silicon cloth layer 21 and simultaneously rolls the first fiber blanket layer 22 around the first silicon cloth layer 21.

Referring to fig. 1, the first fibrous blanket layer 22 is a JAF-200 fibrous blanket, which does not contain any organic binder, has strong stability at high temperature, and has low shot content, i.e., low thermal conductivity, and the high temperature of the first silicon fabric layer 21 is not easily conducted to the outside of the first fibrous blanket layer 22; and the JAF-200 fiber blanket can be subjected to normal service life of the nuclear power station and even high-dose radiation under LOCA accidents, and the physical properties are not obviously changed, so that the protection effect on the air pipe body 1 in the complex environment of the nuclear power station is ensured.

Referring to fig. 1 and 2, a plurality of protrusions 81 are disposed on the outer side of the first silicon fabric layer 21, a plurality of grooves 82 adapted to the protrusions 81 are disposed on the inner side of the first fibrous blanket layer 22, and a part of the protrusions 81 are embedded in the grooves 82 in the winding process of the first fibrous blanket layer 22; the adhesive 3 between the first silicon cloth layer 21 and the first fiber blanket layer 22 is cured quickly, and the adhesive 3 between the first fiber blanket layer 22 and the first silicon cloth layer 21 has a larger action area to connect the two layers.

Referring to fig. 1 and 2, bosses 9 are fixedly mounted at the ends of the first fiber blanket layer 22, the first fiber blanket layer 22 and the bosses 9 thereon are integrally formed, and are made of the same material, the bosses 9 at the two ends of the first fiber blanket layer 22 are respectively located at the positions, close to the inner side and the outer side, of the end of the first fiber blanket layer 22, a user applies the fireproof sealant 4 to the bosses 9 close to the first silicon cloth layer 21, and then the bosses 9 at the two ends of the first fiber blanket layer 22 are overlapped for bonding.

Referring to fig. 1 and 2, one side that the boss 9 at first fibre blanket layer 22 both ends is close to each other all is equipped with a plurality of dentate connecting blocks 10 along self length direction, the dentate connecting block 10 intermeshing of the boss 9 of mutual overlap joint this moment, two boss 9 simultaneously with first fibre blanket layer 22 other end butt, the user also paints fire prevention sealant 4 at boss 9 tip and bonds, the sealed glue 4's of fire prevention active area is great, make first fibre blanket layer 22 have stronger anti-pulling ability, first fibre blanket layer 22 tip overlap joint department is difficult for separating and leads to first fibre blanket layer 22 to drop.

Referring to fig. 1, a plurality of third steel ribbon 7 are installed outward to first fibre blanket layer 22, the user winds third steel ribbon 7 along the length direction equidistant of tuber pipe body 1, and make every third steel ribbon 7 all along tuber pipe body 1's cross-section setting, third steel ribbon 7 further strengthens the limiting displacement to first fibre blanket layer 22, first fibre blanket layer 22 is difficult for droing more, and utilize the fixed mode of third steel ribbon 7, can not lead to the fact destruction to tuber pipe body 1's structure, and then guarantee tuber pipe body 1's leakproofness, the difficult direct and first silicon cloth layer 21 contact of high-temperature gas in the tuber pipe body 1, and then the fire behavior has been improved.

Referring to fig. 1 and 2, the second fibrous blanket layer 23 is made of the same material as the first fibrous blanket layer 22, and the user coats the second layer adhesive 3 on the outside of the first fibrous blanket layer 22, and then rapidly winds the second fibrous blanket layer 23 around the outside of the first fibrous blanket layer 22 by one layer, wherein the adhesive 3 is cured to bond the two layers; the outer side of the first fiber blanket layer 22 is provided with a protrusion 81 which is the same as the outer side of the first silicon cloth layer 21, the inner side of the second fiber blanket layer 23 is provided with a groove 82 which is the same as the inner side of the first fiber blanket layer 22, and the protrusion 81 between the first fiber blanket layer 22 and the second fiber blanket layer 23 is embedded into the corresponding groove 82, so that the action range of the adhesive 3 between the first fiber blanket layer 22 and the second fiber blanket layer 23 is enlarged, and the bonding effect is improved.

Referring to fig. 1 and 2, the end of the second fibrous blanket layer 23 is provided with a boss 9 which is the same as the end of the first fibrous blanket layer 22, and the user uses the fireproof sealant 4 to bond the end of the second fibrous blanket layer 23; the first fiber blanket layer 22 and the second fiber blanket layer 23 are matched with each other to enhance the heat insulation capability; and the JAF-200 fiber blanket has the combustion grade of A1 grade, can hardly combust and has stronger protective capability to the air duct body 1 under the condition of fire.

Referring to fig. 1, a plurality of second steel ribbons 6 are installed to the equidistant length direction of following tuber pipe body 1 outside second fibre blanket layer 23, and the user ties up second steel ribbon 6 after the cross-section of tuber pipe body 1 is wound the round, carries on spacingly to its inside layer structure, and the layer structure is difficult not hard up or even drops, improves fixed effect.

Referring to fig. 1 and 2, after the user winds the second silicon cloth layer 24 around the second fiber blanket layer 23 for one turn, the two end portions of the second silicon cloth layer are staggered, and then the second silicon cloth layer is bonded by using the fireproof sealant 4; because the adhesive 3 is not bonded between the second fiber blanket layer 23 and the second silicon cloth layer 24, when the second silicon cloth layer 24 is subjected to external collision or rubbing, a small amount of relative movement can be generated between the second silicon cloth layer 24 and the second fiber blanket layer 23, and compared with bonding by the adhesive 3, the second silicon cloth layer 24 is not easy to tear, and the service life is long.

Referring to fig. 1, a plurality of first steel ribbons 5 are installed at equal intervals along the length direction of air pipe body 1 outside second silicon cloth layer 24, and the user locks first steel ribbons 5 around the cross-section of air pipe body 1 outside second silicon cloth layer 24 after the round, and second silicon cloth layer 24 is difficult for taking place great displacement along the length direction of air pipe body 1 and leads to phenomenons such as tearing.

Referring to fig. 1, an external fire source is in contact with a second silicon cloth layer 24, and the second silicon cloth layer 23 is matched with the anti-combustion capacity, so that the whole cladding structure can meet the requirements of fire-resistant integrity and heat insulation for two hours, all layer structures are made of flexible materials, the phenomenon of cracking or pulverization caused by temperature change is not prone to occurring, the air pipe body 1 has strong protection capacity in the complex environment of a nuclear power station, all materials are made of domestic materials meeting national standards, and the manufacturing cost is low.

The implementation principle of the fire-proof cladding structure of the air pipe in the embodiment of the application is as follows: when a fire disaster occurs, an external fire source is contacted with the second silicon cloth layer 24, and the whole coating structure can meet the fire resistance integrity and heat insulation within two hours under the combustion resistance of the second fiber blanket layer 23; the internal high-temperature flue gas is not easy to cause the combustion of the layer structure under the action of the first silicon cloth layer 21 and the first fiber blanket layer 22; and all layer structures are made of flexible materials, and the adhesive 3 with strong high-temperature resistance is adopted for bonding, so that the phenomenon of cracking or pulverization caused by temperature change is not easy to occur, and the air pipe body 1 has strong protection capability in the complex environment of the nuclear power station.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.