CN219102313U

CN219102313U - Fireproof composite air duct

Info

Publication number: CN219102313U
Application number: CN202222752257.5U
Authority: CN
Inventors: 邹文杰; 王松平; 黄曙光; 王博麒; 黄河; 郭凤龙; 刘学勤; 向健
Original assignee: Cnnc Xiapu Nuclear Power Co ltd; Sichuan Kaiman Nuclear Power Equipment Co ltd; Zhonghe Longyuan Technology Co ltd; Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Current assignee: Cnnc Xiapu Nuclear Power Co ltd; Sichuan Kaiman Nuclear Power Equipment Co ltd; Zhonghe Longyuan Technology Co ltd; Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-05-30
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses a fireproof composite air duct, which comprises an air duct body, a plurality of heat insulation rings and a plurality of stainless steel strips, wherein the stainless steel strips are fixedly connected with a plurality of studs, a plurality of stainless steel belts are arranged outside the stainless steel strips along the circumferential direction, an inner fireproof felt coating the air duct body is arranged outside the stainless steel belts, elastic locking buckle pieces are arranged on the studs outside the inner fireproof felt, an outer fireproof felt is coated outside the inner fireproof felt, elastic locking buckle pieces are arranged on the studs outside the outer fireproof felt, a protective layer is coated outside the outer fireproof felt, all the studs penetrate through the inner fireproof felt, the outer fireproof felt and the protective layer, elastic locking buckle pieces are arranged on the studs outside the protective layer, and joints of the protective layer are bonded and connected; the utility model has the advantages of quick construction time, good shaping effect, compact lamination of the fireproof felt and the air pipe and good flatness, can meet the airtight and watertight requirements, and improves the construction efficiency of fireproof package.

Description

Fireproof composite air duct

Technical Field

The utility model relates to a fireproof composite air pipe, in particular to a fireproof composite air pipe for ventilation equipment of a nuclear power station.

Background

The air pipe is an important component of a passive fireproof system of the nuclear power station, and the fuel used by the nuclear power station has extremely high radioactivity and can cause huge economic loss once a fire disaster occurs in the nuclear power station, so that the air pipe for the nuclear power station to execute ventilation and smoke exhaust functions needs to ensure that the air pipe normally executes the functions when the fire disaster occurs and slows down the flame spreading speed; the existing fireproof composite air duct comprises an air duct body, an inner protection layer, an inner fireproof felt, an outer fireproof felt and an outer protection layer, wherein the inner protection layer, the inner fireproof felt, the outer fireproof felt and the outer protection layer are sequentially coated outside the air duct body, the inner protection layer is fixedly adhered through a brush adhesive, the inner fireproof felt, the outer fireproof felt and the outer protection layer are all tied and fixed through binding tapes, the protection layers are all made of silicon cloth, and the fireproof felts are all fiber carpets; the defects are as follows: the curing time of glue (adhesive) needs to be waited, so that the construction period is long, the material consumption is high, the cost is high, the shaping effect of the binding tape is poor, and the two layers of fireproof felt are not tightly attached to the air pipe, are easy to droop, have poor flatness and poor attractiveness.

Disclosure of Invention

The utility model aims at overcoming the defects in the prior art, and provides the fireproof composite air pipe, which has the advantages of quick construction time, material saving, lower cost, good shaping effect, compact and smooth adhesion of a fireproof felt and an air pipe, good flatness, airtight and watertight performance and the like, can improve the construction efficiency of a fireproof package, and is also beneficial to the convenience of the fireproof package during operation and maintenance.

In order to achieve the purpose, the fireproof composite air pipe comprises an air pipe body and is characterized in that a plurality of heat insulation rings are arranged outside the air pipe body along the circumferential direction, a plurality of stainless steel bars perpendicular to the circumferential direction are arranged outside the heat insulation rings, a plurality of studs are fixedly connected to each stainless steel bar, a plurality of stainless steel belts are arranged outside all the stainless steel bars along the circumferential direction, an inner fireproof felt coating the air pipe body is arranged outside all the stainless steel belts, all the studs penetrate through the inner fireproof felt, elastic locking buckle pieces are arranged on the studs outside the inner fireproof felt, an outer fireproof felt is coated outside the inner fireproof felt, all the studs penetrate through the outer fireproof felt, elastic locking buckle pieces are arranged on the studs outside the outer fireproof felt, a protective layer is coated outside the outer fireproof felt, all the studs penetrate through the protective layer, elastic locking buckle pieces are arranged on the studs outside the protective layer, and the joint of the protective layer is bonded.

The heat insulation ring is made of glass fiber silicon cloth, the inner layer fireproof felt and the outer layer fireproof felt are made of heat-storage-free fiber carpets, and the outer layer protective layer is made of silicon cloth;

the heat insulation rings can prevent the stainless steel strips from directly contacting the air pipe body and damaging paint on the surface of the air pipe body, the stainless steel strips are fixed through the stainless steel bands, all studs sequentially penetrate through the inner fireproof felt, the outer fireproof felt and the protective layer, and each layer is pressed and fixed through the elastic locking buckle piece, so that the heat insulation ring has the advantages of good shaping effect, compact fit between the fireproof felt and the air pipe, difficult sagging and good flatness;

as a further improvement of the utility model, the intersections of the two ends of each stainless steel bar and the stainless steel ribbon are connected through the fixing buckles, each fixing buckle is provided with a cross-shaped bottom plate and a plurality of bending claws fixedly connected with the bottom plate, the stainless steel bars and the stainless steel ribbon are arranged on the cross-shaped bottom plate, and each bending claw is tightly pressed at the intersection of the stainless steel bars or the stainless steel ribbon; the connection stability of the two ends of the stainless steel bar and the stainless steel ribbon can be realized, and each stud can be kept at the same horizontal position when the fireproof felt is installed;

as a further improvement of the utility model, seams of the inner layer fireproof felt, the outer layer fireproof felt and the protective layer are all arranged in a staggered manner; the method is beneficial to keeping the regularity of each joint, reducing the input of heat, and meeting the requirements of air tightness, water tightness and the like;

as a further improvement of the utility model, the elastic locking buckle pieces comprise a central hole and more than three radial grooves connected with the central hole, wherein conical spring pieces bent upwards are arranged between the radial grooves, and the inner diameter of the central hole is slightly smaller than the nominal diameter of the stud; the elastic locking buckle piece is matched with the stud, the conical spring piece can be clamped into the threaded groove, so that the elastic locking buckle piece and the threaded groove are convenient to assemble, and the elastic locking buckle piece is prevented from automatically falling off;

as a further improvement of the utility model, an adhesive layer is arranged between the inner layer fireproof felt and the outer layer fireproof felt; the two layers of fireproof felts can be better attached, and gaps between the two layers of fireproof felts are eliminated;

in conclusion, the utility model has the advantages of good shaping effect, compact adhesion between the fireproof felt and the air pipe, good flatness, capability of meeting the airtight and watertight requirements, and the like, can improve the construction efficiency of the fireproof package, and is also beneficial to the convenience of the fireproof package during operation and maintenance.

Drawings

Fig. 1 is a perspective view of an embodiment of the present utility model prior to installation of an inner layer flame retardant mat.

Fig. 2 is an enlarged view at a of fig. 1.

Fig. 3 is a perspective view of the fixing clasp jaw of fig. 2 before bending.

Fig. 4 is a perspective view of the fixing buckle claw in fig. 2 after bending.

Fig. 5 is a perspective view, partially in section, of an embodiment of the present utility model.

FIG. 6 is a front view of the stud and spring locking tab of FIG. 5.

Fig. 7 is a top view of the resilient locking tab of fig. 6.

Fig. 8 is a perspective view of an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 8, the fireproof composite air duct of the embodiment comprises an air duct body 1 and a plurality of heat insulation rings 2 arranged outside the air duct body along the circumferential direction, wherein each heat insulation ring 2 is made of glass fiber silicon cloth, joints of the heat insulation rings are bonded and connected through sealant, a plurality of stainless steel strips 3 perpendicular to the circumferential direction are arranged outside all the heat insulation rings 2, a plurality of studs 4 are fixedly connected to each stainless steel strip 3 in a welding manner, a plurality of stainless steel bands 5 are arranged outside all the stainless steel strips 3 along the circumferential direction, the intersections of two ends of each stainless steel strip 3 and the stainless steel bands 5 are connected through fixing buckles 6, each fixing buckle 6 is provided with a cross-shaped bottom plate 7 and a plurality of bending claws 8 integrally connected with the bottom plate 7, the stainless steel strips 3 and the stainless steel bands 5 are arranged on the cross-shaped bottom plate 7, and each bending claw 8 presses the stainless steel strips 3 or the stainless steel bands 5; the inner-layer fireproof felts 9 wrapping the air pipe body 1 are arranged outside all the stainless steel binding belts 5, all the studs 4 penetrate through the inner-layer fireproof felts 9, elastic locking buckling pieces 10 are arranged on the studs 4 outside the inner-layer fireproof felts 9, each elastic locking buckling piece 10 comprises a central hole 11 and six radial grooves 12 connected with the central hole 11, conical elastic pieces 13 bent upwards are arranged between the radial grooves 12, and the inner diameter of each central hole 11 is slightly smaller than the nominal diameter of each stud 4; the inner layer fireproof felt 9 is externally coated with an outer layer fireproof felt 14, all studs 4 penetrate through the outer layer fireproof felt 14, elastic locking buckle pieces 15 are arranged on the studs 4 outside the outer layer fireproof felt 14, the outer layer fireproof felt 14 is externally coated with a protective layer 16, all studs 4 penetrate through the protective layer 16, elastic locking buckle pieces 17 are arranged on the studs 4 outside the protective layer 16, and joints of the protective layer 16 are bonded and connected; the inner layer fireproof felt 9 and the outer layer fireproof felt 14 are made of heat-storage-free fiber carpets, the protective layer 16 is made of silicon cloth, and

joints

18, 19 and 21 of the inner layer fireproof felt 9, the outer layer fireproof felt 14 and the protective layer 16 are arranged in a staggered manner;

according to the utility model, the heat insulation rings 2 can prevent the stainless steel bars 3 from contacting the air pipe body 1 and damaging paint on the surfaces of the heat insulation rings, the stainless steel bars 3 are fixed through the stainless steel bands 5, all studs 4 pass through the inner fireproof felt 9, the outer fireproof felt 14 and the protective layer 16 in sequence, and all the layers are pressed and fixed through the elastic

locking buckle plates

10, 15 and 17, so that the heat insulation rings have the advantages of good shaping effect, compact fit between the fireproof felt and the air pipe, difficult sagging and good flatness, and the fixing buckle 6 can realize the connection stability of the two ends of the stainless steel bars 3 and the stainless steel bands 4, and meanwhile, all the studs 4 can be kept at the same horizontal position when the fireproof felt is installed; the elastic

locking buckle pieces

10, 15 and 17 are matched with the stud 4, the conical spring piece 13 can be clamped into a thread groove of the stud 4, so that the elastic locking buckle pieces are convenient to assemble, and the elastic locking buckle pieces are prevented from automatically falling off; the adhesive layer 22 allows for better adhesion of the two layers of the flame retardant felt and eliminates gaps between the two layers of flame retardant felt; the

joints

18, 19 and 21 of the inner fireproof felt 9, the outer fireproof felt 14 and the protective layer 16 are arranged in a staggered mode, so that the regularity of the joints is kept, the heat input is reduced, and the requirements of air tightness, water tightness and the like can be met.

Claims

1. The utility model provides a fire prevention composite air pipe, including the tuber pipe body, characterized in that tuber pipe body is equipped with several heat insulating ring along circumference outward, be equipped with the piece with circumference vertically several stainless steel strip outward at the heat insulating ring, every stainless steel strip all has linked firmly several double-screw bolt, all be equipped with the piece along circumference outside the stainless steel strip, be equipped with the inlayer fireproof felt of cladding tuber pipe body outward at all stainless steel strips, all double-screw bolts all pass inlayer fireproof felt, all be equipped with elastic locking cramp on the double-screw bolt outward of inlayer fireproof felt, inlayer fireproof felt outsourcing has outer fireproof felt, all double-screw bolts all pass outer fireproof felt, all be equipped with elastic locking cramp on the double-screw bolt outward of outer fireproof felt, outer fireproof felt outsourcing has the protective layer, all double-screw bolts all pass the protective layer, all be equipped with elastic locking cramp on the double-screw bolt outward of protective layer, the seam crossing bonding of protective layer links.

2. The fire-proof composite air duct of claim 1, wherein the heat-insulating ring is made of glass fiber silicon cloth, the inner layer fire-proof felt and the outer layer fire-proof felt are made of non-heat-storage fiber carpets, and the protective layer is made of silicon cloth.

3. The fire-proof composite air pipe as claimed in claim 1 or 2, wherein the intersections of the two ends of each stainless steel strip and the stainless steel ribbon are connected through fixing buckles, each fixing buckle is provided with a cross-shaped bottom plate and a plurality of bending claws fixedly connected with the bottom plate, the stainless steel strips and the stainless steel ribbon are arranged on the cross-shaped bottom plate, and each bending claw presses the stainless steel strips or the stainless steel ribbon.

4. A fire-resistant composite ductwork according to claim 3, characterised in that the joints of the inner fire-resistant felt, the outer fire-resistant felt and the protective layer are all arranged in a staggered manner.

5. The fire-proof composite air duct of claim 4, wherein the elastic locking buckle piece comprises a central hole and more than three radial grooves connected with the central hole, wherein conical spring pieces bent upwards are arranged between the radial grooves, and the inner diameter of the central hole is smaller than the nominal diameter of the stud.

6. The fire resistant composite ductwork of claim 5, wherein an adhesive layer is disposed between said inner and outer fire resistant felts.