CN217539862U

CN217539862U - Fireproof structure of metal air pipe

Info

Publication number: CN217539862U
Application number: CN202220728897.XU
Authority: CN
Inventors: 吴征; 刘军; 何智超; 李兴武; 胡春林; 冯璐
Original assignee: Scegc Equipment Installation Group Co ltd
Current assignee: Scegc Equipment Installation Group Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-10-04
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a fire resistive construction of metal tuber pipe, including hanging in the metal tuber pipe of floor bottom, follow in the floor bottom surface the metal tuber pipe moves towards the interval and is provided with suspension device, is provided with side firebreak device at the vertical lateral wall asymmetry of metal tuber pipe to be provided with end firebreak device bottom the metal tuber pipe. Metal tuber pipe both sides adopt the fire prevention shutter cloth by flagging to the flagging bottom surface fire prevention sheet layer under the metal tuber pipe in floor lower part, realize the fire protection of metal tuber pipe both sides, because the fire-resistant limit of fire prevention shutter cloth all is greater than 2h, prefabricate the fixed flagging fixed of back top moreover can, it is convenient to be under construction, and weight distribution is on the furred ceiling floor moreover, the flagging shutter cloth in both sides has also realized the effective fire protection to the jib. It solves the current problem that there is the metal tuber pipe to hang the depth increase and the construction cost that increases and great weight that hangs through the mode of whole parcel to effectively alleviate construction cost and hang weight, shorten construction cycle, increase performance of enterprises.

Description

Fireproof structure of metal air pipe

Technical Field

The utility model relates to a building smoke protection and exhaust technical field especially relates to a fire resistive construction of metal tuber pipe.

Background

The national headpart 'technical Standard for building Smoke prevention and exhaust System' GB 51251-2017 is implemented in 2018, 8 and 1, and has no precedent because the national headpart technical Standard for Smoke prevention and exhaust is adopted, wherein a large number of standards are derived from the summary and the concentration of fire rescue experience, and meanwhile, a large number of international advanced standards are retrieved and indexed. Meanwhile, related construction technologies are still in exploration and exploration stages, the current industry engineering practice is shown as the attached figure 4 in the specification, and the following defects and shortcomings exist:

1. greatly increase the investment of building and structure

The floor and the bearing beam under the floor are designed to basically determine the building floor height, if the fire resistance limit practice required by the specification is executed according to the drawing shown in figure 4, 49mm needs to be added to the upper part of the vertical part on the basis of the net size of the metal air pipe, 49mm needs to be added to the lower part of the vertical part, and the actual engineering practice is increased by 100mm. The net height of a single-storey building is reduced by 100mm, the building cost per unit area of the net height reduction of 100mm is increased by more than 100 yuan according to the measurement and calculation of related real estate enterprises, and the cost is continuously increased along with the supervision and management of manpower, materials and environmental protection.

2. Greatly increase the construction cost

The domestic metal air pipe basically realizes mechanical automatic production, only needs assembly construction on site, and is the major of mechanization and prefabrication in all industries in building construction. However, the increase of the fireproof plate structure requires that a light steel keel support frame is arranged on the outer side of the installed air pipe, and then a circle of fireproof plate is covered, wherein a scaffold needs to be erected for covering the fireproof plate, and the elbow, the tee joint, the support and hanger and other parts need to be manually discharged and blanked in a single piece, so that labor cost, machinery and construction measures are obviously increased. The light steel structure of sheet metal tuber pipe increase increases the PLASTIC LAMINATED again and leads to additional layer weight often to surpass tuber pipe body structure, leads to a gallows specification and cost-push up.

3. Low work efficiency, technical redundancy

The construction labor efficiency of the fire-proof plate and the fire-proof plate light steel keel support frame after the air pipe is installed is low, and other relevant electromechanical majors and the construction period of the decoration ceiling are delayed.

4. After the air pipe is coated by the fireproof plate, the exposed part of the support and hanger cannot be protected, thick fireproof paint cannot be coated on the support and hanger in civil buildings, and the thin fireproof paint can ensure the fire resistance limit when being coated, but releases toxic gas after encountering fire. This is also an important reason why air ducts do not use fire-retardant coatings as protection layers for endurance limits; and the fire-proof plate is coated on the upper part of the air pipe, the actual fire-proof significance is not great except for increasing the dead weight, the lower part and the side surface of the air pipe can meet open fire, the upper part of the air pipe close to the floor slab usually has no combustible, and the fire-proof limit of the floor slab is at least 1.5h.

The time and expense of cladding PLASTIC LAMINATED often surpass the construction of tuber pipe body structure in the actual construction, consequently need a novel fire resistive construction that can reach the requirement of tuber pipe fire endurance to solve above-mentioned problem urgently.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a fire resistive construction of metal tuber pipe solves the present mode that adopts whole cladding and has defects such as technical redundancy, protection zone omission to effectively reduce construction cost and alleviate and hang weight, shorten construction cycle, increase performance in business.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a fire resistive construction of metal tuber pipe, is including hanging the metal tuber pipe in the floor bottom, its characterized in that: suspension devices are arranged on the bottom surface of the floor slab at intervals along the moving direction of the metal air duct, side fire protection devices are symmetrically arranged outside the vertical side wall of the metal air duct, and a bottom fire protection device is arranged at the bottom of the metal air duct.

Preferably, the suspension device is suspension rods which are symmetrically arranged on the outer side of the metal air pipe in a bilateral mode along the moving direction interval of the metal air pipe, the top ends of the suspension rods are connected with the floor slab, and the bottom of the suspension rods is horizontally connected with a cross arm which is in contact with and supported by the bottom surface of the metal air pipe.

Preferably, the side fire-proof device is a fire-proof rolling curtain cloth, the top end of the fire-proof rolling curtain cloth is connected with the bottom surface of the floor slab in a closed mode and is arranged on the outer side of the hanging rod, a hollow steel pipe wraps the bottom of the fire-proof rolling curtain cloth, and the fire-proof rolling curtain cloth is correspondingly connected with the end portion of the cross arm.

Preferably, fire-proof plate suspension rods are symmetrically arranged on two sides of the metal air duct, and the bottom fire-proof device is a fire-proof plate horizontally suspended at the bottoms of the symmetrical fire-proof plate suspension rods.

Preferably, an additional fire-proof plate suspended on the suspension rod is horizontally arranged at the bottom of the cross arm, the additional fire-proof plate is spliced between the adjacent fire-proof plates, and fire-proof cloth is bonded to the bottom surfaces of the joints of the two ends of the additional fire-proof plate and the fire-proof plates.

The utility model has the advantages that:

1. the metal tuber pipe both sides adopt the fire prevention shutter cloth by flagging to the bottom surface fire prevention sheet layer under the metal tuber pipe of floor lower part, realize the fire protection of metal tuber pipe both sides, because fire prevention shutter cloth fire endurance all is greater than 2h, prefabricate the fixed flagging of back top moreover fixed can, it is convenient to be under construction, and weight distribution is on the floor moreover, the flagging shutter cloth in both sides has also realized the effective fire protection to the jib.

2. The upper parts of the fireproof roller shutter cloth on the two sides are wrapped by angle steel and then fixed on a floor, the lower part of the fireproof roller shutter cloth is folded and sewn, and a hollow circular steel tube is inserted into a folding cavity after the roller shutter cloth droops so as to ensure that the lower end of the fireproof roller shutter cloth is straight.

3. The joint of the fireproof plate is provided with external additional fireproof cloth, and the two sides of the fireproof plate are fixed by self-tapping screws, so that the continuity of the fireproof plate is ensured, and the joint of the fireproof plate is prevented from expanding with heat and contracting with cold and contracting with damp.

Drawings

Fig. 1 is a side view of the metal air duct suspension of the present invention.

Fig. 2 is a side view of the fire protection structure and the metal air duct of the present invention.

Fig. 3 is a right side view structural diagram of fig. 2 according to the present invention.

Fig. 4 is a schematic view of the current fire protection process for a metal duct.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

Referring to the attached drawings 1-3, the fireproof structure of the metal air duct comprises the metal air duct 1 suspended at the bottom of a floor slab 10, suspension devices are arranged on the bottom surface of the floor slab 10 at intervals along the moving direction of the metal air duct 1, and the metal air duct 1 is stably suspended through the suspension devices and is adaptive to the moving direction arrangement of the metal air duct 1. Side fire protection devices are symmetrically arranged outside the vertical side wall of the metal air pipe 1, and a bottom fire protection device is arranged at the bottom of the metal air pipe 1. Carry out complete effectual fire prevention through side firebreak device and end firebreak device to metal tuber pipe 1 and handle, solve and adopt whole cladding mode at present to have metal tuber pipe 1 to hang the defect that the degree of depth increases, construction cost and hang the weight increase to effectively reduce construction cost and alleviate and hang weight, shorten construction cycle, increase performance in business.

Specifically, as shown in fig. 1, the suspension device is suspension rods 2 which are arranged at intervals along the direction of the metal air duct 1 and are arranged at the outer sides of the metal air duct in a bilateral symmetry manner, the top ends of the symmetrical suspension rods 2 are connected with a floor or a beam (20 in the figure), and the bottom of the symmetrical suspension rods is horizontally connected with a cross arm 3 which is in contact with and supported by the bottom surface of the metal air duct 1. The hanger bar 2 is preferably fixed to a steel plate embedded in the floor 10 in advance. The metal air pipe 1 is fixed on the floor 10 by the top surfaces of the suspension rods 2 and the cross arms 3, so that the body of the metal air pipe 1 is tightly connected with the floor 10 or a beam, and the weight of the metal air pipe 1, a bottom fire protection device and other accessories is borne.

Specifically, as shown in fig. 3, the side fire-proof device is a fire-proof rolling curtain cloth 4 (the fire-proof limit of which is greater than 2 h) whose top end is connected with the bottom surface of the floor slab 10 in a closed manner and which is arranged outside the hanger rod 2, and preferably, after angle steel (11 in the figure) is wrapped on the top end of the fire-proof rolling curtain cloth 4, the angle steel is fixed on the bottom surface of the floor slab 10 through an expansion bolt, so that the fire-proof rolling curtain cloth 4 is reliably connected with the floor slab 10.

In order to ensure that the fireproof rolling curtain cloth 4 is vertical and avoid the problem of heated curling, as shown in fig. 3, the bottom of the fireproof rolling curtain cloth 4 is wrapped with a hollow steel pipe 5, which can ensure that the lower part of the fireproof rolling curtain cloth 4 is effectively straightened after the fireproof rolling curtain cloth falls down and avoid the curling of the fireproof rolling curtain cloth 4.

In order to further improve the verticality of the fireproof rolling curtain cloth 4, the fireproof rolling curtain cloth 4 is correspondingly connected with the end part of the cross arm 3, and the fireproof rolling curtain cloth 4 is fixed at the end part of the cross arm 3 through screws to resist air waves generated in a fire disaster, so that the side surface of the metal air pipe 1 and the tightness of a seam of a bottom fireproof device are effectively protected.

When meeting the beam 20 below the floor 10, the gap of the fireproof rolling curtain cloth 4 is cut in advance, and the fireproof rolling curtain cloth and the beam are fixed by angle steel 11 around, so that the fireproof rolling curtain cloth 4 is ensured to be tightly attached to the floor 10 and the beam 20 at the top of the building.

Specifically, as shown in fig. 2 to 3, fire-proof plate suspension rods 6 are symmetrically arranged on both sides of the metal air duct 1, and the bottom fire-proof device is a fire-proof plate 7 horizontally suspended at the bottom of the symmetrical fire-proof plate suspension rods 6. The concrete structure is that square steel (shown as 12 in the figure) is arranged on the top surface of the metal air duct 1 and extends out of two sides of the metal air duct 1, the top end of a fire-proof plate suspender 6 (preferably a harness cord screw) is fixed in the square steel, and the lower part of the fire-proof plate suspender 6 is a V-shaped groove plate (shown as 13 in the figure) for supporting a fire-proof plate 7.

In order to facilitate the splicing and supporting of the fire-proof plates 7, as shown in fig. 2, an additional fire-proof plate 8 suspended on the suspension rod 2 is horizontally arranged at the bottom of the cross arm 3, and is spliced between the adjacent fire-proof plates 7. The additional fire-proof plate 8 is synchronously hung after the cross arm 3 is hung by the hanging rod 2, then the fire-proof plate 7 is spliced between the adjacent additional fire-proof plates 8, and preferably, both sides of the additional fire-proof plate 8 are wider than the cross arm 3 by 100mm, which can effectively protect the load-bearing capacity of the cross arm 3 under the fire condition.

In order to overcome the gap caused by the deformation of the joint between the fire-proof plate 7 and the additional fire-proof plate 8 and the local deformation of the metal air duct 1, fire-proof cloth 9 is adhered to the joint bottom surface of the fire-proof plate 7 at both ends of the additional fire-proof plate 8, as shown in fig. 2. The fireproof cloth 9 is preferably fixed by self-tapping screws again after the gaps are bonded, so that the connection strength is ensured, and the gaps at the joint of the fireproof plate 7 and the additional fireproof plate 8 are eliminated.

The principle of the utility model is that: firstly, a metal air duct 1 is suspended and fixed on the bottom surface of a floor slab 10 through a suspension rod 2 and a cross arm 3, an additional fireproof plate 8 is suspended and fixed at the bottom of the cross arm 3 synchronously, square steel 12 is arranged at the interval of the top surface of the metal air duct 1, fireproof plate suspension rods 6 are vertically fixed on two sides of the metal air duct and are tightly attached to two side walls of the metal air duct 1, a fireproof plate 7 is spliced between the adjacent additional fireproof plates 8, and a V-shaped groove plate 13 is arranged at the bottom of each fireproof plate suspension rod 6 to support the fireproof plate 7;

then wrap up the angle steel 11 on the cut-out fire prevention rolling screen cloth 4 top, and fix this angle steel 11 on the floor 10 bottom surface through expansion bolts, then sew the fire prevention rolling screen cloth 4 bottom into the tube-shape, and wear to establish the hollow steel pipe 5 among them and make it in the vertical state, fix the corresponding position of the fire prevention rolling screen cloth 4 lower extreme in the tip of cross arm 3 through the screw at last, in order to resist the air wave when the conflagration takes place, to this, the fire resistive construction of metal tuber pipe 1 periphery sets up and accomplishes, from this tuber pipe has realized comprehensive fire protection, can reach the fire endurance requirement of the standard requirement, solve the defect that there is the metal tuber pipe 1 that hangs the degree of depth to increase, construction cost and hang the weight increase of the mode that adopts whole cladding at present through this fire resistive construction. Effectively reduce construction cost and alleviate and hang weight, shorten construction cycle, increase enterprise's benefit.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The protection scope of the utility model is composed of the attached the claims that follow and their equivalents.

Claims

1. The utility model provides a fire resistive construction of metal tuber pipe, is including hanging in metal tuber pipe (1) of floor (10) bottom, its characterized in that: suspension devices are arranged on the bottom surface of the floor slab (10) along the moving direction of the metal air pipe (1) at intervals, lateral fire prevention devices are symmetrically arranged outside the vertical side wall of the metal air pipe (1), and a bottom fire prevention device is arranged at the bottom of the metal air pipe (1).

2. The fire protection structure of a metal blast pipe of claim 1, wherein: the suspension device is characterized in that suspension rods (2) are symmetrically arranged on the outer sides of the metal air pipes (1) in a symmetrical mode, the top ends of the suspension rods (2) are connected with a floor slab, and the bottom of the suspension rods is horizontally connected with cross arms (3) supported by the bottom surfaces of the metal air pipes (1) in a contact mode.

3. The fire protection structure of a metal blast pipe of claim 2, wherein: the side fireproof device is a fireproof rolling curtain cloth (4) with the top end connected with the bottom surface of the floor slab (10) in a closed mode and arranged on the outer side of the hanging rod (2), a hollow steel pipe (5) is wrapped at the bottom of the fireproof rolling curtain cloth (4), and the fireproof rolling curtain cloth (4) is correspondingly connected with the end portion of the cross arm (3).

4. A fire protection structure for a metal blast pipe according to claim 3, wherein: and fire-proof plate suspension rods (6) are symmetrically arranged on two sides of the metal air pipe (1), and the bottom fire-proof device is a fire-proof plate (7) horizontally suspended at the bottoms of the symmetrical fire-proof plate suspension rods (6).

5. The fire protection structure of a metal blast pipe of claim 4, wherein: and an additional fireproof plate (8) suspended on the suspension rod (2) is horizontally arranged at the bottom of the cross arm (3), is spliced between the adjacent fireproof plates (7), and is adhered with fireproof cloth (9) at two ends of the additional fireproof plate (8) and the bottom surface of a joint of the fireproof plates (7).