CN206304262U - A kind of foam tank extinguishing device - Google Patents

Abstract

The utility model relates to a foam tank fire extinguishing device. The device comprises a foam tank, a deluge valve group, a signal butterfly valve, a foam proportional mixing device, a signal ball valve, a hydraulic control valve and a check valve. The water inlet of the foam tank passes through The pipeline is connected to one end of a signal ball valve, and the other end of the signal ball valve is directly connected to the external fire main pipeline through the pipeline. The utility model can make the foam tank in a pressurized state by moving the water inlet pipeline of the foam tank drawn from the fire main pipeline to the front of the deluge valve group. When a fire occurs, it can reduce the steps of filling the foam tank after the deluge valve group is opened, shorten the response time of the fire extinguishing system, squeeze out the foam liquid from the foam tank in time, improve the response speed of the foam-water deluge system, and reduce the risk of fire. The degree of harm caused increases the operational safety and stability of the system.

Description

A foam tank fire extinguishing device

technical field

The utility model belongs to the technical field of fire extinguishing equipment for nuclear power plants and is applied to a foam-water rain shower system, in particular to a foam tank fire extinguishing device.

Background technique

The main function of the fifth diesel generator building is as an additional power source for the nuclear power plant. When all the off-site power sources are lost and the two emergency diesel engines of one unit fail to start, the diesel engines in this plant will be put into use to ensure the safe shutdown of the nuclear power plant. The workshop of the fifth diesel generator is equipped with a large amount of combustibles, such as diesel oil, lubricating oil, cable trays, etc., and the combustibles are arranged in almost every room of the workshop, which is highly dangerous. Considering the importance of backup power in the Fukushima incident, it is necessary to improve the safety of the fifth diesel generator building through various improvements.

As shown in FIG. 1 , it is a schematic diagram of connecting pipes for filling water in a foam tank in a foam-water deluge system in the prior art. Among them, 1 is a foam tank, 2 is a deluge valve group (normally closed), 3 is a signal butterfly valve (normally closed), 4 is a foam proportional mixing device, 5 is a signal ball valve, 6 is a hydraulic control valve, and 7 is a check valve. In the foam-water deluge system, the pipeline for filling the foam tank with water is set behind the deluge valve group, that is, the pipeline behind the deluge valve group is not filled with water in the case of non-fire, and there is no pressure in the foam tank; After the deluge valve group is opened, the pipeline is filled with water and the foam tank is filled with water to extrude the foam liquid. However, combustibles burn quickly and involve a wide range. The above-mentioned existing fire protection system layout has a long reaction time, and it is often impossible to make the foam-water rain system spray foam liquid in time when a fire occurs, so that the reaction speed is relatively slow and cannot be reduced as much as possible. The degree of hazard caused by a small fire.

Utility model content

The purpose of this utility model is to provide an improved method for shortening the spraying time of the foam liquid in the foam-water rain shower system for the fifth diesel generator workshop, so that the foam tank is in a pressurized state, and the fire When it happens, it can reduce the steps of filling the foam tank with water after the deluge valve group is opened, shorten the system response time, squeeze out the foam liquid from the foam tank in time, and reduce the degree of damage caused by the fire.

The utility model provides a foam tank fire extinguishing device. The device comprises a foam tank, a deluge valve group, a signal butterfly valve, a foam proportional mixing device, a signal ball valve, a hydraulic control valve, a check valve, and a water inlet of the foam tank One end of a signal ball valve is connected through a pipeline, and the other end of the signal ball valve is directly connected with an external fire main pipeline through a pipeline.

Further, in the above-mentioned foam tank fire extinguishing device, there are two signal butterfly valves, and one of the signal butterfly valves, the deluge valve group, and the other signal butterfly valve are connected in series through pipelines in sequence, and one of the signal butterfly valves It is directly connected to the front end of the deluge valve group, and the other signal butterfly valve is connected to the fire water inlet of the foam proportional mixing device.

Further, in the foam tank fire extinguishing device as described above, another signal ball valve, the hydraulic control valve, and the check valve are connected in series between the foam tank and the foam proportional mixing device.

Further, as for the above-mentioned foam tank fire extinguishing device, the outlet of the foam proportional mixing device is connected to an external spray point.

Furthermore, in the above-mentioned foam tank fire extinguishing device, the foam tank and the deluge valve group are arranged in the fire fighting equipment room.

The effect of the utility model is: the foam tank is in a pressurized state. When a fire occurs, the steps of filling the foam tank after the deluge valve group is opened can be reduced, the system reaction time can be shortened, and the foam liquid can be squeezed out from the foam tank in time, reducing The degree of hazard caused by fire.

Description of drawings

Accompanying drawing 1 is the connection diagram of the original foam tank water filling pipeline in the foam-water deluge system;

Accompanying drawing 2 is the connection diagram of the water filling pipeline of the foam tank of the present utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in Figure 2, 1 is the foam tank, 2 is the deluge valve group (normally closed), 3 is the signal butterfly valve (normally closed), 4 is the foam proportional mixing device, 5 is the signal ball valve, 6 is the hydraulic control valve, 7 check valve. The water inlet of the foam tank is connected to one end of a signal ball valve through a pipeline, and the other end of the signal ball valve is directly connected to an external fire main pipeline through a pipeline.

There are two signal butterfly valves, and one of the signal butterfly valves, the deluge valve group, and the other signal butterfly valve are connected in series through pipelines, and one of the signal butterfly valves is directly connected to the front end of the deluge valve group. The other signal butterfly valve is connected to the fire water inlet of the foam proportional mixing device.

Another signal ball valve, the hydraulic control valve, and a check valve are connected in series between the foam tank and the foam proportional mixing device. The outlet of the foam proportional mixing device is connected to an external spray point.

The utility model moves the water inlet pipeline of the foam tank led from the fire main pipeline to the front of the deluge valve group, so that the foam tank is in a pressurized state. When a fire occurs, the step of filling the foam tank with water after the deluge valve group is opened can be reduced, the system response time can be shortened, the foam liquid can be squeezed out of the foam tank in time, and the degree of damage caused by the fire can be reduced.

The utility model adopts a foam-water deluge system for areas covered by diesel oil and lubricating oil, and fire-fighting facilities such as foam tanks and deluge valve groups are arranged in the fire-fighting equipment room.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the present utility model fall within the scope of the claims of the utility model and equivalent technologies, the utility model is also intended to include these modifications and variations.

Claims (5)

1. a kind of foam tank extinguishing device, described device includes foam tank, deluge valves unit, Signal butterfly bamper, froth ratio mixing dress Put, signal ball valve, hydraulic control valve, check-valves, it is characterised in that：

The water inlet of the foam tank connects an one end for signal ball valve by pipeline, and the other end of the signal ball valve passes through Pipeline is directly connected to outside fire chief road.

2. foam tank extinguishing device as claimed in claim 1, it is characterised in that：

The Signal butterfly bamper has two, and one of Signal butterfly bamper, the deluge valves unit and another Signal butterfly bamper pass through Pipeline is sequentially connected in series together, and one of Signal butterfly bamper is directly connected to the deluge valves unit front end, described another letter Number butterfly valve connects the fire-fighting water inlet of the foam proportioning unit.

3. foam tank extinguishing device as claimed in claim 1 or 2, it is characterised in that：

Another signal ball valve and waterpower control are sequentially connected in series between the foam tank and the foam proportioning unit Valve, check-valves.

4. foam tank extinguishing device as claimed in claim 3, it is characterised in that：

The outside spray point of outlet connection of the foam proportioning unit.

5. foam tank extinguishing device as claimed in claim 1, it is characterised in that：

It is interior that the foam tank and deluge valves unit are arranged in fire-fighting equipment.