CN215863485U

CN215863485U - Vertical smoke exhaust system for vertical shaft

Info

Publication number: CN215863485U
Application number: CN202121452320.2U
Authority: CN
Inventors: 吕铁成
Original assignee: Central South Architectural Design Institute Co Ltd
Current assignee: Central South Architectural Design Institute Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-02-18
Anticipated expiration: 2031-06-29

Abstract

The utility model provides a vertical smoke exhaust system for a shaft, which comprises annular horizontal main pipes, a smoke exhaust shaft and a smoke exhaust fan, wherein the annular horizontal main pipes are respectively arranged along each layer of a building and are communicated with the smoke exhaust shaft through connecting pipes, the smoke exhaust shaft is connected with the smoke exhaust fan through the connecting pipes, and the annular horizontal main pipes are communicated with a smoke exhaust port through a plurality of smoke exhaust branch pipes. The utility model reduces the section area of the smoke exhaust horizontal main pipe and the smoke exhaust vertical shaft, reduces the air quantity of the smoke exhaust fan and lowers the construction cost.

Description

Vertical smoke exhaust system for vertical shaft

Technical Field

The utility model belongs to the technical field of building fire fighting, and particularly relates to a vertical smoke exhaust system for a vertical shaft.

Background

According to the requirements of building design fire protection standards and building smoke prevention and discharge system technical standards, smoke discharge facilities are required to be arranged in a public building, wherein the building area in the public building is more than 100 square meters, rooms where people often stay and internal walkways with the length of more than 20 m; for areas that do not meet natural smoke extraction conditions, mechanical smoke extraction facilities need to be installed. For a high-rise building which does not meet the natural smoke exhaust condition, the design scheme is as follows: one or more smoke exhausting vertical shafts are arranged; arranging a smoke exhaust fan at the top of each smoke exhaust vertical shaft, wherein the air volume of each smoke exhaust fan is calculated according to the maximum value of the sum of the smoke exhaust volumes of any two adjacent smoke prevention subareas; and then leading out a horizontal main pipe from each smoke exhaust vertical shaft, and finally leading out a smoke exhaust branch pipe from the horizontal main pipe to each smoke prevention subarea. The design scheme has the problems of large section size of the horizontal main pipe, large section size of the smoke exhaust vertical shaft, large air quantity of the smoke exhaust fan and the like. The cross section size of the horizontal main smoke exhaust pipe has a large influence on the height of a building layer, the cross section size of a smoke exhaust vertical shaft has a large influence on the plane arrangement of the building, and the increase of the two sizes finally results in the great increase of the construction cost.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a vertical smoke exhaust system for a vertical shaft, which can reduce the section area of a horizontal main smoke exhaust pipe, reduce the section area of a smoke exhaust shaft and reduce the air volume of a smoke exhaust fan.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the vertical smoke exhaust system for the shaft is characterized by comprising annular horizontal main pipes, a smoke exhaust shaft and a smoke exhaust fan, wherein the annular horizontal main pipes are arranged along each layer of a building respectively and are communicated with the smoke exhaust shaft through connecting pipes, the smoke exhaust shaft is connected with the smoke exhaust fan through the connecting pipes, and the annular horizontal main pipes are communicated with a smoke exhaust port through a plurality of smoke exhaust branch pipes.

According to the scheme, the two smoke exhaust vertical shafts are respectively positioned on two sides of the annular horizontal main pipe and are respectively communicated with the annular horizontal main pipe through the connecting pipe.

According to the scheme, the inlet of the smoke exhaust fan is provided with the smoke exhaust fireproof valve, and the outlet of the smoke exhaust fan is provided with the rainproof shutter.

According to the scheme, the smoke exhaust branch pipe is sequentially provided with the smoke exhaust fire damper and the smoke exhaust valve.

According to the scheme, the smoke exhaust fire prevention valve is arranged on the connecting pipe.

According to the scheme, the section size of the annular horizontal main pipe is determined by calculation according to the smoke discharge amount of the maximum smoke discharge branch pipe.

According to the scheme, the section size of the smoke exhaust vertical shaft is determined by calculation according to the smoke exhaust amount of the maximum smoke exhaust branch pipe.

According to the scheme, the air quantity of the smoke exhaust fan is calculated according to 1.2 times of the smoke exhaust quantity of the maximum smoke exhaust branch pipe.

The utility model has the beneficial effects that: the vertical smoke exhaust system of the vertical shaft is provided with the smoke exhaust vertical shaft and the smoke exhaust fan, and the sectional area of the horizontal main pipe can be reduced by 50% by arranging the annular smoke exhaust horizontal main pipe; then the annular horizontal main pipe is connected with the two smoke exhaust vertical shafts, and the sectional area of each smoke exhaust vertical shaft can be reduced by 50 percent; through the measures, the air quantity of the fan can be reduced by 50%.

Drawings

Fig. 1 is a schematic structural diagram of a single shaft according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a dual shaft configuration according to an embodiment of the present invention.

Wherein: 1-circular horizontal main pipe; 2, a smoke exhaust vertical shaft; 3-smoke exhaust fan; 4-connecting pipe; 5-smoke exhaust branch pipes; 6-smoke outlet; 7-smoke exhaust fire prevention valve; 8-rain-proof shutter; 9-smoke exhaust valve.

Detailed Description

The present invention is further illustrated by the following figures and specific examples, it is to be understood that these examples are given solely for the purpose of illustration and are not intended to limit the scope of the utility model, which is to be determined by the appended claims as a matter of routine modification by those skilled in the art.

As shown in fig. 1, a vertical smoke exhaust system for a shaft comprises an annular horizontal main pipe 1, a smoke exhaust shaft 2 and a smoke exhaust fan 3, wherein the annular horizontal main pipe is respectively arranged along each layer of a building and communicated with the smoke exhaust shaft through a connecting pipe 4, the smoke exhaust shaft is connected with the smoke exhaust fan through a connecting pipe, and the annular horizontal main pipe is communicated with a smoke exhaust port 6 through a plurality of smoke exhaust branch pipes 5.

As shown in fig. 2, two smoke evacuation shafts are respectively located at two sides of the annular horizontal main pipe and are respectively communicated with the annular horizontal main pipe through the connecting pipe.

The entrance of the smoke exhaust fan is provided with a smoke exhaust fire valve 7, and the exit is provided with a rainproof louver 8. The smoke exhaust branch pipe is sequentially provided with a smoke exhaust fireproof valve and a smoke exhaust valve 9. The connecting pipe is provided with a smoke exhaust fire damper.

The section size of the annular horizontal main pipe is determined by calculation according to the smoke discharge amount of the maximum smoke discharge branch pipe.

And the section size of the smoke exhaust vertical shaft is determined by calculation according to the smoke exhaust amount of the maximum smoke exhaust branch pipe.

The air quantity of the smoke exhaust fan is calculated according to 1.2 times of the smoke exhaust quantity of the maximum smoke exhaust branch pipe.

Taking a double-shaft smoke exhaust system as an example:

after the fire is confirmed, the fire control system automatically opens the smoke exhaust valves of the fire-proof and smoke-proof subareas, and the two smoke exhaust fans are started simultaneously; the smoke enters the annular horizontal main pipe through the smoke exhaust branch pipe, then enters the two smoke exhaust vertical shafts respectively in two directions, and finally is exhausted outdoors by the smoke exhaust fan respectively.

And (3) comparison calculation: the net height of the building is 3.5m, 10 floors are built, 10 smoke-proof partitions are arranged on each floor, the area of each smoke-proof partition is 280 square meters, and the following table is obtained by comparing and calculating:

according to the calculation results, the sectional dimension of the horizontal main exhaust pipe is 50% of that of the conventional design, the sectional dimension of the vertical exhaust shaft is 50% of that of the conventional design, and the total air volume of the exhaust fan is 50% of that of the conventional design.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.

Claims

1. The vertical smoke exhaust system for the shaft is characterized by comprising annular horizontal main pipes, a smoke exhaust shaft and a smoke exhaust fan, wherein the annular horizontal main pipes are arranged along each layer of a building respectively and are communicated with the smoke exhaust shaft through connecting pipes, the smoke exhaust shaft is connected with the smoke exhaust fan through the connecting pipes, and the annular horizontal main pipes are communicated with a smoke exhaust port through a plurality of smoke exhaust branch pipes.

2. A vertical shaft smoke exhaust system according to claim 1, wherein the number of the smoke exhaust shafts is two, and the two smoke exhaust shafts are respectively located at two sides of the annular horizontal main pipe and are respectively communicated with the annular horizontal main pipe through the connecting pipe.

3. A shaft vertical smoke exhaust system according to claim 1 or 2, wherein the entrance of the smoke exhaust fan is provided with a smoke exhaust fire damper, and the exit is provided with rain-proof shutters.

4. A shaft vertical smoke exhaust system according to claim 3, wherein the smoke exhaust branch pipe is provided with a smoke exhaust fire damper and a smoke exhaust valve in sequence.

5. A shaft vertical smoke exhaust system according to claim 4 wherein the connecting pipe is provided with a smoke exhaust fire damper.

6. A vertical shaft smoke exhaust system according to claim 5, wherein the cross-sectional dimension of the annular horizontal main pipe is determined by calculation according to the maximum smoke exhaust amount of the smoke exhaust branch pipe.

7. A shaft vertical smoke exhaust system according to claim 6, wherein the cross section size of the smoke exhaust shaft is determined by calculation according to the maximum smoke exhaust amount of the smoke exhaust branch pipes.

8. A shaft vertical smoke exhaust system according to claim 7, wherein the air volume of the smoke exhaust fan is calculated by 1.2 times of the maximum smoke exhaust volume of the smoke exhaust branch pipe.