Fixed pipe network extinguishing system

Abstract

The invention discloses a fixed pipe network extinguishing system. The system comprises a liquid fire extinguishing agent supply device, a gas fire extinguishing agent supply device, a pipe network control system, spray nozzles arranged at each fire extinguishing position and a fixed pipe network. Each spray nozzle is provided with a gas-liquid mixing device, and the spray nozzles are in parallel connection through the fixed pipe network. The liquid fire extinguishing agent supply device and the gas fire extinguishing agent supply device separately transport a gas fire extinguishing agent and a gas fire extinguishing agent to the gas-liquid mixing device at each nozzle; and the gas-liquid mixing device is a rotational flow mixing device consisting of a hollow cylinder. The invention adopts independent parallel pipe network to transport different fire extinguishing agents to spray nozzles at the end of the pipe network for mixing and foaming; and the power for conveying the fire extinguishing agents is provided by a high pressure gas multipath structure, or respectively by high pressure gas and a power pump. According to the invention, different fire extinguishing agents are mixed and foamed in the end spray nozzles; the mixing device and a foaming device both have concise structure; and no additional power is required to mix the fire extinguishing agents. Therefore, the system is applicable to the end of multipoint and dispersed pipe network, so as to ensure mixing effect and foam expansion of the fire extinguishing agents.

Description

technical field [0001] The invention belongs to the field of design and manufacture of fire-fighting equipment, in particular to the field of design of fixed pipe network fire extinguishing systems. Background technique [0002] Every part of the building that is prone to fire or some key parts of the fire protection needs to install a fixed pipe network automatic fire extinguishing system. The automatic fire extinguishing system often uses a pipe network structure to connect each fire protection point into a monitoring network and a fire extinguishing network. Functional fire extinguishing nozzles, such as closed nozzles, realize monitoring and automatically start spraying fire extinguishing in case of fire. [0003] The existing fixed pipe network automatic fire extinguishing system is realized by the centralized supply of fire extinguishing agent. The fire extinguishing agent mostly adopts a single fire extinguishing agent, such as ordinary water, water-based foam fire ex...

AI Technical Summary

Problems solved by technology

[0003] The existing fixed pipe network automatic fire extinguishing system is realized by the centralized supply of fire extinguishing agent. The fire extinguishing agent mostly adopts a single fire extinguishing agent, such as ordinary water, water-based foam fire extinguishing agent, carbon dioxide fire extinguishing agent or clean gas fire extinguishing agent. A single fire extinguishing agent cannot According to the needs of different fire sources to achieve fire extinguishing, the fire extinguishing performance cannot meet the needs

The fixed pipe network automatic fire extinguishing system also has a mixed fire extinguishing agent method. In the existing fixed pipe network automatic fire extinguishing system, the mixture of different fire extinguishing agents is uniformly mixed and then transported to each fire extinguishing nozzle through the pipe network; due to the complexity of the pipe network , the delivery path and length of each sprinkler pipe network are different, and the mixing effect of the fire extinguishing agent after reaching each fire extinguishing nozzle is different, especially for the foam fire extinguishing agent, the foaming effect cannot be stably controlled during the pipe network transportation, which affects the fire extinguishing of the fire extinguishing agent performance

[0004] Existing fire extinguishing agent mixing devices such as impeller stirring and mixing devices have large volume, complex structure, high equipment cost, poor mixing uniformity, and are not suitable for a large number of dispersed fire extinguishing nozzles, especially the miniaturization of nozzles.

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