CN110694198A

CN110694198A - Tunnel fire extinguishing system

Info

Publication number: CN110694198A
Application number: CN201910991021.7A
Authority: CN
Inventors: 顾轩昂
Original assignee: Individual
Current assignee: Dongying Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-01-17
Anticipated expiration: 2039-10-18
Also published as: CN110694198B

Abstract

The invention provides a tunnel fire extinguishing system, which mainly comprises a high-level water tank, a water supply pipeline and a water supply and air guide pipe, wherein the water supply pipeline is positioned at the top end inside a tunnel, the water supply and air guide pipe is connected between the high-level water tank and the water supply pipeline, the high-level water tank is positioned above the tunnel, the water supply pipeline is connected with a plurality of spray heads which are uniformly distributed along the length direction of the tunnel, the water supply and air guide pipe is provided with a plurality of air guide pipes, and the air guide pipes are internally provided with one-way valves which are used for controlling fluid to flow only in and out.

Description

Tunnel fire extinguishing system

Technical Field

The invention relates to the technical field of tunnel fire extinguishing, in particular to a tunnel fire extinguishing system.

Background

Inside because the height above sea level is low and the condition such as ventilation condition is not good, when there is the vehicle to bump when arousing the conflagration inside the tunnel, though can put out the fire through current automatic sprinkler system, the in-process of taking place the conflagration, tunnel inside oxygen constantly consumes, but because the continuous rising of temperature, tunnel internal pressure also constantly rises, leads to outside gas to be difficult to get into, and stranded personnel in the tunnel face the danger that the oxygen deficiency was stifled.

Disclosure of Invention

In order to solve the problems that fire in a tunnel is difficult to control and oxygen in the tunnel is insufficient, the invention provides a tunnel fire extinguishing system, which adopts the following technical scheme:

the utility model provides a tunnel fire extinguishing system, includes the high-order pond, along the tunnel length direction distribution fixed connection in the water supply pipe on the inside top in tunnel and along a plurality of shower head of water supply pipe length direction evenly distributed, its characterized in that, connect gradually injection pipe and jet pipe between high-order pond and the water supply pipe, injection pipe one end links to each other with high-order pond bottom, and the other end links to each other with jet pipe one end, and the other end and the water supply pipe of jet pipe link to each other, the one end that jet pipe and injection pipe link to each other is the big little venturi type structure of middle internal diameter in both sides internal diameter, still is connected with the guide duct on the jet pipe that is close to injection pipe one side, and be equipped with the check valve that is used for control fluid only can.

Preferably, the spray header is a closed spray header.

Preferably, an included angle between the air guide pipe and the water supply air guide pipe is an acute angle.

The invention has the beneficial effects that: high-order pond, injection pipe and jet pipe are as water supply facilities, and the structure of jet pipe utilizes the efflux principle for can bring external gas into at the in-process that carries out the water spray and put out a fire, not only can carry out the water spray and put out a fire, can bring external gas into the tunnel in addition, prevent that personnel in the tunnel from producing the danger of stifling.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic view of the connection structure of the jet pipe and the jet pipe

The device comprises a high-level water tank 1, a spray pipe 2, a jet pipe 3, an air guide pipe 4, a check valve 5, a water supply pipeline 6 and a spray header 7.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The tunnel fire extinguishing system as shown in fig. 1-2 mainly comprises a high-level water tank 1, a water supply pipeline 6 and a spray head 7 which are positioned above a tunnel, wherein an injection pipe 2 and a jet pipe 3 are sequentially connected between the high-level water tank 1 and the water supply pipeline 6, one end of the injection pipe 2 is connected with the lower part of the high-level water tank 1, the other end of the injection pipe is provided with a spray head and is connected with the inside of the jet pipe 3, the pipe body of the end, connected with the injection pipe 3, of the jet pipe 2 is of a Venturi pipe structure with two large ends and a small middle part, two air guide pipes 4 are also connected on the pipe body part in front of the Venturi pipe body, a one-way valve 5 is arranged in each air guide pipe 4, the external gas can enter the jet pipe 3 and simultaneously,

the other end of the jet pipe 3 is connected with a water supply pipeline 6, the water supply pipeline 6 is distributed along the length direction of the tunnel, a plurality of spray heads 7 are uniformly arranged along the length direction, and the spray heads 7 adopt glass ball closed spray heads.

When a car accident or other conditions cause fire in the tunnel, and the inside reaches a certain temperature, liquid in the glass ball at the water spraying opening part of the glass ball sprayer expands and cracks the glass ball to start the sprayer to spray water, water in the high-level water tank 1 sequentially passes through the spraying pipe 2 under the action of gravity, the spraying pipe 3 and the water supply pipeline 6 and then is sprayed out through the spraying head 7 for fire extinguishing, and since water flow passes through the spraying pipe 3, external gas is brought into the water flow under the action of the air guide pipe 4 and the venturi tube type structure at the front end of the spraying pipe 3 to form a gas-liquid mixture with the water flow, so that the fluid sprayed by the spraying head 7 contains a certain amount of external gas, namely oxygen.

The invention adopts the jet principle, when the injection pipe 2 and the jet pipe 3 supply water to the inside of the water supply pipeline 6 for fire extinguishing, the air guide pipe 4 sucks external air into the jet pipe 3 to mix with water flow, thereby not only extinguishing fire, but also providing a certain amount of oxygen for trapped people in the tunnel, and preventing the oxygen in the tunnel from being insufficient to generate other dangers caused by oxygen deficiency.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a tunnel fire extinguishing system, includes the high-order pond, along the tunnel length direction distribution fixed connection in the water supply pipe on the inside top in tunnel and along a plurality of shower head of water supply pipe length direction evenly distributed, its characterized in that, connect gradually injection pipe and jet pipe between high-order pond and the water supply pipe, injection pipe one end links to each other with high-order pond bottom, and the other end links to each other with jet pipe one end, and the other end and the water supply pipe of jet pipe link to each other, the one end that jet pipe and injection pipe link to each other is the big little venturi type structure of middle internal diameter in both sides internal diameter, still is connected with the guide duct on the jet pipe that is close to injection pipe one side, and be equipped with the check valve that is used for control fluid only can.

2. The tunnel fire suppression system of claim 1, wherein the sprinkler head is a closed sprinkler head.

3. The tunnel fire extinguishing system according to claim 1 or 2, wherein an included angle between the air guide pipe and the jet pipe is an acute angle.