CN211257686U - Fire-proof device for smoke-proof air pipe - Google Patents

Abstract

The utility model discloses a fireproof device for a smoke prevention and exhaust air pipe, which comprises more than two keel assemblies, rock wool and fireproof plates; wherein, more than two keel components are arranged on the smoke prevention and exhaust air pipe at intervals to be used as hoops; each keel component comprises four keels and right-angle mounting flat steel, the four keels are respectively mounted on four surfaces of the smoke-proof and exhaust air pipe, and adjacent keels are fixed through the right-angle mounting flat steel; the height of the keel is not less than that of a flange of the smoke prevention and exhaust air pipe; the fire-proof plate covers between the adjacent keel components, and rock wool is filled between the fire-proof plate and the smoke-proof air pipe. The utility model discloses guaranteed the reliability of preventing discharging fume the tuber pipe, can prevent the flue gas that produces when the flue gas is to the invasion of personnel evacuation passageway and get rid of the conflagration as early as possible effectively simultaneously, guaranteed personnel's quick safe evacuation, relevant regional air supply smoke prevention and smoke exhaust requirement when satisfying the conflagration.

Description

Fire-proof device for smoke-proof air pipe

Technical Field

The utility model relates to a field of discharging fume is prevented in the fire control, in particular to a firebreak device for preventing discharging fume tuber pipe.

Background

The function of the smoke prevention and exhaust system mainly has two aspects: firstly, smoke-proof facilities are arranged at the evacuation channel and the position where people are dense, so that the safe evacuation of the people is facilitated; and toxic high-temperature smoke generated in a fire scene is discharged in time, so that the safety of an area is ensured, and the fire extinguishing barrier is eliminated.

At present, a smoke prevention and exhaust system is arranged in a relatively effective and mature means for controlling smoke, the smoke prevention and exhaust system mainly comprises a blower, a smoke exhaust fan, an air duct, an air supply opening, a smoke exhaust opening, a high-airtightness fire damper and the like, and a smoke prevention and exhaust pipeline (a smoke prevention and exhaust air pipe) is an important component for ensuring the normal operation of the smoke prevention and exhaust system.

In practical engineering, most of conventional fire-fighting smoke-control and smoke-control air ducts are made of galvanized steel plates, the fire resistance limit of the fire-fighting smoke-control and smoke-control air ducts is only 0.25 hour, and the technical standard GB51251 of a building smoke-control and smoke-control system stipulates that:

1. the arrangement and fire-resistance limits of the mechanical pressurized air supply duct should comply with the following regulations:

a. the vertically arranged air supply pipeline is independently arranged in the pipeline well, and when the difficulty exists, the fire resistance limit of the air supply pipeline which is not arranged in the pipeline well or is shared with other pipelines in the pipeline well is not lower than 1.00 hour.

b. The horizontally arranged air supply pipeline has the fire resistance limit not lower than 0.50 hour when arranged in the suspended ceiling; when not disposed within a drop ceiling, its fire endurance should not be below 1.00 hours.

2. The smoke exhaust duct arrangement and fire limits should comply with the following regulations:

a. 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 ℃.

b. The vertically arranged smoke exhaust pipeline is arranged in an independent pipeline well, and the fire resistance limit of the smoke exhaust pipeline is not lower than 0.50 hour.

c. 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 hour; when there is no difficulty, it can be placed directly in the room, but the fire resistance limit of the pipe should not be lower than 1.00 hour.

d. The fire-resistant limit of the smoke exhaust pipeline arranged in the suspended ceiling of the walkway part and the smoke exhaust pipeline passing through the fireproof subarea is not less than 1.00 hour, but the fire-resistant limit of the smoke exhaust pipeline of the equipment room and the garage is not less than 0.50 hour.

If the pressurized air supply pipeline and the smoke exhaust pipeline can not meet the requirement of fire resistance limit, the unsmooth and smooth smoke exhaust and the poor mechanical smoke prevention effect are influenced, evacuation obstacles are caused, and the evacuation of people and rescue work are influenced.

Under the condition that the conventional fire-fighting smoke-preventing and exhaust air pipe cannot meet the technical standard GB51251 of the building smoke-preventing and exhaust system, how to improve the conventional fire-fighting smoke-preventing and exhaust air pipe is a difficult problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming and not enough of current air supply and exhaust duct, provide a firebreak device for preventing discharging fume tuber pipe.

The purpose of the utility model is realized through the following technical scheme:

a fire protection device for a smoke prevention and exhaust air pipe comprises more than two keel assemblies, rock wool and fire protection plates; wherein, more than two keel components are arranged on the smoke prevention and exhaust air pipe at intervals to be used as hoops; each keel component comprises four keels and right-angle mounting flat steel, the four keels are respectively mounted on four surfaces of the smoke-proof and exhaust air pipe, and adjacent keels are fixed through the right-angle mounting flat steel; the height of the keel is not less than that of a flange of the smoke prevention and exhaust air pipe; the fire-proof plate covers between the adjacent keel components, and rock wool is filled between the fire-proof plate and the smoke-proof air pipe.

The fireproof device for the smoke prevention and exhaust air pipe further comprises a right-angle L-shaped edge strip, and two ends of the right-angle L-shaped edge strip are respectively arranged at right-angle turning positions of the adjacent keel assemblies; the fireproof plate covers the right-angle L-shaped edge strip, and the fireproof plate is fixedly connected with the right-angle L-shaped edge strip. Need set up four (four belong to the optimal state) right angle L shape strake between the adjacent fossil fragments subassembly, can right angle L shape strake to the fixed of PLASTIC LAMINATED, firstly can increase the supporting role to the rock wool, secondly make PLASTIC LAMINATED and rock wool laminate more closely.

And the right-angle L-shaped edge strips and the fireproof plate are fastened through self-tapping screws.

The keel is a U-shaped keel or a hollow column keel. U type fossil fragments or cavity post fossil fragments can alleviate the dead weight of preventing and discharging fume the tuber pipe on satisfying the basis of preventing discharging fume the requirement, reduce cost simultaneously.

The surfaces of the keel, the smoke-exhaust preventing air pipe and the right-angle-shaped installation flat steel are all provided with a zinc coating. The surfaces of the right-angle L-shaped edgings are provided with zinc coatings. The smoke-preventing and discharging air pipe can be a galvanized steel plate air pipe.

The fireproof plate is a calcium silicate fireproof plate.

The fossil fragments subassembly is installed in the straight tube section department of preventing discharging fume the tuber pipe, prevents that elbow department, the reducing section of discharging fume the tuber pipe do not install the fossil fragments subassembly.

The smoke-preventing and discharging air pipe is placed on more than one air pipe cross arm support, and two ends of each air pipe cross arm support are fixed with the structural floor slab through support hanging rods respectively.

The fireproof device for the smoke prevention and exhaust air pipe further comprises more than one fireproof plate cross arm support, the two ends of each fireproof plate cross arm support are fixed with the structural floor slab through support hanging rods respectively, and the fireproof plate cross arm supports are arranged below the air pipe cross arm supports and used for supporting the fireproof plates. The fire prevention board cross arm support forms the support with tuber pipe cross arm support jointly, further ensures the stability of whole prevention and exhaust tuber pipe.

The utility model discloses a firebreak device for preventing and discharging fume tuber pipe, its mounting method, step including following order:

s1, installing the smoke prevention and exhaust air pipe;

s2, using four keels as hoops, wherein the four keels are respectively installed on four surfaces of the smoke and smoke preventing and exhausting air pipe, and adjacent keels are fixed through right-angle installation flat steel; more than one hoop is arranged on the smoke prevention and exhaust air pipe at intervals;

s3, respectively installing two ends of the right-angle L-shaped edge strip at the right-angle turning positions of the adjacent hoops;

s4, after rock wool is installed on the outer surface of the smoke prevention and exhaust air pipe, the rock wool is aligned to the right-angle L edge strips on the two sides of the hoop, and the fireproof plates are fastened on the right-angle L edge strips and the keels.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model overcomes the shortcoming and not enough of current air supply, exhaust duct technique provide one kind and accord with the mounting means of the tuber pipe system that "building smoke prevention and exhaust system technical standard GB 51251" fire-resistant limit required, its mounting structure is simple, can provide the mounting means of an tuber pipe effectively, satisfies the fire-resistant requirement of smoke prevention and exhaust system to the tuber pipe.

2. The utility model discloses guaranteed the reliability of preventing discharging fume the tuber pipe, can prevent the flue gas that produces when the flue gas is to the invasion of personnel evacuation passageway and get rid of the conflagration as early as possible effectively simultaneously, guaranteed personnel's quick safe evacuation, relevant regional air supply smoke prevention and smoke exhaust requirement when satisfying the conflagration.

3. The utility model mainly relates to a fire hazard danger area prevents in coordination with adjacent region system of discharging fume, and the sparse passageway of personnel can be guaranteed to the reliability of tuber pipe system not receive the invasion of conflagration flue gas to get rid of the flue gas that the conflagration produced rapidly. This tuber pipe system can be used for the region that requires to guarantee the malleation such as smoke prevention stairwell, smoke prevention antechamber, fire elevator antechamber, simultaneously, discharges fume in the region of catching fire, also can be used to the system of discharging fume.

4. The utility model discloses use extensively, can be used to underground building such as super high-rise building, subway, tunnel, large-scale commercial and industrial place etc..

Drawings

Fig. 1 is an installation elevation view of a fire protection device for a smoke protection and exhaust duct of the present invention.

Fig. 2 is a side view of the installation of a fire protection device for a smoke protection and exhaust air duct of the present invention.

Fig. 3 is an installation axial view of a fire protection device for a smoke prevention and exhaust duct.

Wherein the reference numerals have the following meanings:

1-calcium silicate fireproof plate, 2-galvanized steel plate air pipe, 3-U-shaped galvanized keel, 4-galvanized right-angle installation flat steel, 5-right-angle L-shaped galvanized edge strip, 6-air pipe cross arm support, 7-support suspender, 8-fireproof plate cross arm support, 9-structural floor slab and 10-middle support U-shaped galvanized keel.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Referring to fig. 1, 2 and 3, the fireproof device for the smoke prevention and exhaust air pipe comprises a galvanized steel plate air pipe, a pressurized air supply system air duct, a smoke exhaust system air duct, a fireproof plate with the fire endurance of 1 hour, a U-shaped galvanized keel, a galvanized right-angle L-shaped galvanized edge strip, a right-angle installation flat steel and a self-tapping screw.

The installation mode is as follows:

first, installation preparation

The following materials were prepared:

1. the thickness is 1.5mmU type galvanized keel, and the height is greater than the galvanized steel plate air pipe flange; the thickness of the air duct cross arm support is 1mm, and the width of the air duct cross arm support is 60 mm;

2. a right-angle L-shaped galvanized edge strip with the side length of 30X30mm and the thickness of 1.5 mm;

3. the side length is 50X50mm, the thickness is 2mm galvanized right-angle mounting flat steel;

4. calcium silicate fire-proof boards;

5. self-tapping screws;

6. a bracket suspender and an air duct cross arm bracket.

Secondly, installation process:

1. installing galvanized steel plate air pipes, reserving the support hanger rods to be 80-100 mm long, and using the screws as load-bearing expansion screws;

2. the U-shaped galvanized keels are used as the hoops, when the long sides of the galvanized steel plate air ducts are smaller than 1220mm, the hoop spacing is 2440mm, and when the long sides of the galvanized steel plate air ducts are larger than 1220mm, the hoop spacing is 1220 mm; the elbow of the galvanized steel sheet air pipe and the diameter-variable anchor ear are arranged at the straight pipe section;

3. installing right-angle L-shaped galvanized edge strips at four corners of galvanized steel plate air pipes: mounting right-angle L-shaped galvanized strakes on four corners of the hoop;

4. installing rock wool;

5. wrapping a fireproof plate: aligning right-angled L-shaped galvanized strakes at two sides of the hoop, drilling a hole between the middle (15mm) of each strake and the center of each strake, and fastening the strakes by using self-tapping screws with the distance of 200-250 mm;

6. and the air pipe cross arm support is fastened under the support of the air pipe.

The air pipe cross arm support is U-shaped steel.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims (9)

1. A fire protection device for a smoke prevention and exhaust air pipe is characterized by comprising more than two keel assemblies, rock wool and fire protection plates; wherein, more than two keel components are arranged on the smoke prevention and exhaust air pipe at intervals to be used as hoops; each keel component comprises four keels and right-angle mounting flat steel, the four keels are respectively mounted on four surfaces of the smoke-proof and exhaust air pipe, and adjacent keels are fixed through the right-angle mounting flat steel; the height of the keel is not less than that of a flange of the smoke prevention and exhaust air pipe; the fire-proof plate covers between the adjacent keel components, and rock wool is filled between the fire-proof plate and the smoke-proof air pipe.

2. The fire protection device for a smoke exhaust prevention duct according to claim 1, further comprising a right-angled L-shaped bar, wherein two ends of the right-angled L-shaped bar are respectively installed at right-angled corners of adjacent keel assemblies; the fireproof plate covers the right-angle L-shaped edge strip, and the fireproof plate is fixedly connected with the right-angle L-shaped edge strip.

3. The fire protection device for smoke prevention and exhaust air duct according to claim 2, wherein the right-angle L-shaped edge strips and the fire prevention plate are fastened by self-tapping screws.

4. The fire protection device for a smoke exhaust prevention duct according to claim 1, wherein the keel is a U-shaped keel or a hollow column keel.

5. The fire protection device for a smoke prevention and exhaust air duct of claim 1, wherein the surfaces of the keel, the smoke prevention and exhaust air duct, and the right-angled mounting flat steel are provided with zinc plating layers.

6. The fire protection device for a smoke exhaust prevention duct according to claim 1, wherein the fire protection plate is a calcium silicate fire protection plate.

7. The fire protection device for a smoke prevention and exhaust air duct according to claim 1, wherein the keel assembly is installed at a straight section of the smoke prevention and exhaust air duct, and neither the elbow nor the reducer section of the smoke prevention and exhaust air duct is provided with the keel assembly.

8. The fire protection device for a smoke prevention duct of claim 1, wherein the smoke prevention duct is placed on one or more duct cross-arm supports, each of which is fixed at both ends to the structural floor by a support hanger bar.

9. The fire protection device for a smoke exhaust prevention duct according to claim 8, further comprising more than one fire protection plate cross arm bracket, both ends of each fire protection plate cross arm bracket being fixed to the structural floor via bracket hanger rods, respectively, and the fire protection plate cross arm bracket being disposed below the duct cross arm bracket for supporting the fire protection plate.

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