CN206934489U - A kind of low pressure water and the united fine water mist fire-extinguishing system of chemical gas extinguishing chemical - Google Patents

Abstract

The utility model relates to a fine water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent, which comprises a clean chemical fire extinguishing agent storage unit, a fire water pipeline, a compressed air unit, a proportional mixer and a fine water mist nozzle unit. The fire extinguishing agent storage unit and the fire water pipeline are respectively connected to the gas inlet and liquid inlet of the proportioning mixer for proportion adjustment, and the outlet of the proportioning mixer and the compressed air unit are connected to the fine water mist nozzle unit, which includes air-water automatic control Valve, compressed air-water premixer and nozzle, the outlet of the proportional mixer is connected to the liquid inlet pipe of the air-water automatic control valve, the compressed air unit is connected to the air-water automatic control valve inlet pipe, the liquid outlet pipe and the air outlet pipe of the air-water automatic control valve It is connected to the liquid inlet and the air inlet of the compressed air-water premixer, and the outlet port of the compressed air-water premixer is connected to the nozzle. The fire extinguishing system of the utility model has unique structural design, is simple and practical, has good effect and low cost.

Description

A fine water mist fire extinguishing system combining low pressure water and chemical gas fire extinguishing agent

technical field

The utility model belongs to a fire extinguishing device, in particular to a fine water mist fire extinguishing system combining low-pressure water and chemical gas fire extinguishing agent.

Background technique

At present, water mist fire extinguishing systems are usually used in places such as offices, shopping malls, factories, warehouses, and communication rooms. Water mist fire extinguishing has many advantages. Because the diameter of fine water mist droplets is small, compared with the same volume of water, its surface area increases sharply, thereby enhancing the efficiency of heat exchange and achieving a very good cooling effect. The fine water mist is quickly vaporized after absorbing heat, causing the volume to expand rapidly, usually reaching more than 1700 times, thereby reducing the oxygen concentration in the air, inhibiting the oxidation reaction speed in combustion, and playing a role of suffocation. It can be seen that the fire extinguishing mechanism of fine water mist: one is the cooling effect, absorbing heat; the other is suffocation, blocking the oxidation reaction. In addition, fine water mist has a very superior performance in blocking heat radiation transmission, and can effectively block strong heat radiation. However, compared with chemical gas fire extinguishing agents, water mist fire extinguishing speed is slower.

Heptafluoropropane, trifluoromethane, perfluorohexanone, and bromofluoropropene, etc., have attracted much attention as clean chemical gas fire extinguishing agents due to their high efficiency, cleanliness, and environmental protection. The fire extinguishing agent can quickly suppress the spread of the flame through physical and chemical methods. The physical gasification stage absorbs a large amount of heat, and the chemical reaction generates a large number of free radicals to block the combustion chain reaction and quickly extinguish the flame. During the whole fire extinguishing process, the fire is quickly extinguished and there is no solid or powder residue. However, it will produce a poisonous strong acid gas HF during the fire extinguishing process, which will seriously corrode metal equipment and electronic equipment in a humid environment.

Therefore, if the two are organically combined, the smoke concentration can be reduced, the toxic gas can be dissolved and absorbed, and the fire scene environment can be quickly purified. Especially suitable for offices, shopping malls, factories, warehouses, communication rooms and other places. Most of the existing water mist is high-pressure water mist. The pipelines, nozzles, accessories and pumps of the high-pressure system require high working pressure, the cost is relatively expensive, and the nozzles are prone to clogging and failure. Therefore, it is necessary to develop a fire extinguishing system that can combine clean chemical gas with a water mist fire extinguishing system, and can reduce the requirements on the high pressure system and avoid blockage, which is suitable for the closed space where important items are stored.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a fire extinguishing system that combines clean chemical gas with a fine water mist fire extinguishing system, reduces the requirements on the high pressure system, and avoids blockage.

The utility model solves its technical problem and realizes through the following technical solutions:

A fine water mist fire extinguishing system combining low-pressure water and chemical gas fire extinguishing agent, characterized in that it includes clean chemical fire extinguishing agent storage unit, fire water pipeline, compressed air unit, proportional mixer and fine water mist nozzle unit, clean chemical fire extinguishing The agent storage unit and the fire water pipeline are respectively connected to the gas inlet and liquid inlet of the proportional mixer for proportional adjustment, and the outlet of the proportional mixer and the compressed air unit are connected to the fine water mist nozzle unit, which includes an air-water automatic control valve , Compressed air-water pre-mixer and nozzle, the outlet of the proportional mixer is connected to the liquid inlet pipe of the air-water self-control valve, the compressed air unit is connected to the air-water self-control valve inlet pipe, the liquid outlet pipe and the air-water self-control valve are connected To the liquid inlet and air inlet of the compressed air-water premixer, the outlet end of the compressed air-water premixer is connected to the nozzle.

Moreover, the specific structure of the compressed air-water premixer is as follows: a suction chamber, a throat chamber and a diffusion chamber connected in sequence are provided on the central axis, and a nozzle is formed on the end of the air inlet, and the nozzle extends into the suction chamber. , the other end of the air inlet is set outside the compressed air-water pre-mixer, one side of the suction chamber is provided with a liquid inlet, and the liquid inlet corresponds to the lower part of the nozzle, and the other end of the diffusion chamber is the compressed air-water pre-mixer. outlet port of the mixer.

Moreover, the nozzle is a fire SL-F600-7/G4.5DN20 fine water mist nozzle.

Advantage and beneficial effect of the present utility model are:

1. The water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent combines the effective combination of the respective advantages of the two fire extinguishing methods of clean chemical gas fire extinguishing and fine water mist fire extinguishing. It can not only realize efficient, fast and clean fire extinguishing, It can also effectively reduce the temperature of the fire scene and the concentration of toxic and corrosive gases such as HF in the fire extinguishing space.

2. The water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent, the water supply system is low-pressure water for normal fire-fighting water supply, and the nozzle is fire-fighting SL-F600-7/G4.5DN20 fine water mist nozzle, which is not easy to be blocked Water quality requirements are reduced; the particle size of the generated fine water mist is finer and more uniform than the existing high-pressure fine water mist, the effective range of action is larger, and the fire extinguishing effect is better.

3. The water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent has a unique structural design, is simple and practical, and can not only be applied to the rescue of initial fires in large spaces such as general shopping malls, offices, factories, warehouses, etc. In addition, because the clean chemical gas fire extinguishing agent is non-conductive, and the fine water mist droplets are small, this system can also be applied to the fire protection of electronic and electrical places such as small power distribution rooms, cable and electrical cabinets, and computer communication rooms.

Description of drawings

Fig. 1 is a structural principle block diagram of the utility model;

Fig. 2 is a structural schematic diagram of the fine water mist nozzle unit of the present invention.

1-Air-water automatic control valve inlet pipe, 2-Air-water automatic control valve inlet pipe, 3-Air-water automatic control valve, 4-Inlet of compressed air-water premixer, 5-Nozzle, 6-Suction chamber, 7-Throat cavity , 8-air-water premixer, 9-diffusion chamber, 10-outlet port, 11-housing, 12-nozzle, 13-air-water premixer liquid inlet.

detailed description

The utility model is described in further detail below through specific examples, the following examples are only descriptive, not limiting, and cannot limit the protection scope of the utility model with this.

A water mist fire extinguishing system combining low-pressure water and chemical gas fire extinguishing agent, as shown in Figure 1, includes a clean chemical fire extinguishing agent storage unit, fire water pipeline, compressed air unit, proportional mixer and water mist nozzle unit. The clean chemical fire extinguishing agent storage unit and the fire water pipeline are respectively connected to the gas inlet and liquid inlet of the proportioning mixer for proportion adjustment. The outlet of the proportioning mixer and the compressed air unit are connected to the fine water mist nozzle unit, which includes air Water automatic control valve 3, compressed air-water premixer 8 and nozzle 12, the outlet of the proportional mixer is connected to the liquid inlet pipe 1 of the air-water automatic control valve, the compressed air unit is connected to the intake pipe 2 of the air-water automatic control valve, and the air-water automatic control valve The liquid outlet pipe and the air outlet pipe are connected to the liquid inlet 13 and the air inlet 4 of the compressed air-water premixer, and the outlet port 10 of the compressed air-water premixer is connected to the nozzle 12. A casing 11 is arranged outside the compressed air-water premixer.

The specific structure of the compressed air-water premixer is as follows: a suction chamber 6, a throat chamber 7 and a diffusion chamber 9 connected in turn are provided on the central axis, and a nozzle 5 is formed on the end of the air inlet, and the nozzle extends into the suction chamber to The other end of the gas port is located outside the compressed air-water premixer, the liquid inlet is provided on one side of the suction chamber, and the liquid inlet corresponds to the lower part of the nozzle, and the other end of the diffusion chamber is the outlet port of the compressed air-water premixer 10 .

The nozzle is a fire SL-F600-7/G4.5DN20 fine water mist nozzle. The shape of sprinkling water is parabolic, and 80-100% of the total water is sprayed to the ground. Protect rooms with suspended ceilings.

Although the embodiments and drawings of the utility model disclosed for the purpose of illustration, those skilled in the art can understand that various replacements, changes and modifications can be made without departing from the spirit and scope of the utility model and the appended claims. It is possible, and therefore the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (3)

1. A water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent is characterized in that: it includes a clean chemical fire extinguishing agent storage unit, fire water pipeline, compressed air unit, proportional mixer and fine water mist nozzle unit, clean The chemical fire extinguishing agent storage unit and the fire water pipeline are respectively connected to the gas inlet and liquid inlet of the proportional mixer for proportional adjustment. The outlet of the proportional mixer and the compressed air unit are connected to the fine water mist nozzle unit. The fine water mist nozzle unit includes air and water Automatic control valve, compressed air-water pre-mixer and nozzle, the outlet of the proportional mixer is connected to the liquid inlet pipe of the air-water automatic control valve, the compressed air unit is connected to the inlet pipe of the air-water automatic control valve, the liquid outlet pipe and outlet of the air-water automatic control valve The air pipe is connected to the liquid inlet and the air inlet of the compressed air-water premixer, and the outlet end of the compressed air-water premixer is connected to the nozzle. 2. A water mist fire extinguishing system combined with low-pressure water and chemical gas fire extinguishing agent according to claim 1, characterized in that: the specific structure of the compressed air-water premixer is as follows: the central axis is sequentially provided with communication The suction cavity, the throat cavity and the diffuser cavity, the air inlet end is shaped with a nozzle, the nozzle extends into the suction cavity, the other end of the air inlet is located outside the compressed air-water premixer, one of the suction cavity A liquid inlet is provided on the side, and the liquid inlet corresponds to the lower part of the nozzle, and the other end of the diffusion chamber is the outlet end of the compressed air-water premixer. 3. A water mist fire extinguishing system combining low-pressure water and chemical gas fire extinguishing agent according to claim 1, characterized in that: said nozzle is a fire SL-F600-7/G4.5DN20 water mist nozzle.