JPH0110389Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) This invention relates to the improvement of a seal part fire extinguishing system in a floating roof type tank for storing crude oil and other flammable liquids, and in particular provides a fire extinguishing system that operates safely and reliably. The purpose is to

(Prior art and its problems) In a floating roof tank for storing crude oil or flammable liquid, a sealing device ( A seal portion (hereinafter referred to as a seal portion 3) is provided.

Furthermore, above the seal part 3, there is a floating roof 1.
A rain shield plate 4 is attached to the inner peripheral wall side of the tank body 2 from the side, and has a structure to prevent rainwater from flowing into the seal portion 3.

Incidentally, in the space between the rain shield plate 4 and the seal part 3, vapor of stored liquid generated from the seal part 3 tends to accumulate, and in the event of an earthquake or lightning strike, the vapor may ignite and cause a fire accident. There is a danger of causing

Therefore, in order to prevent such fire accidents, a nozzle 7 equipped with a fire detection device is installed above the seal part 3, as shown in FIG. 1, for the purpose of initial extinguishing.
A fire extinguishing system consisting of a fire extinguishing pipe 8 having a fire extinguishing system is incorporated.

The fire extinguishing piping 8 of this fire extinguishing system is supported by a bracket 9 extending from the floating roof 1 side, and as can be understood from the figure, the entire fire extinguishing system is
It is located at a position projecting from the floating roof 1 side to the inner circumferential wall surface side of the tank body 2. Therefore, due to the earthquake, floating roof 1
If the tank shakes, there is a risk that the fire extinguishing piping 8 and bracket 9 of the fire extinguishing system will collide with the inner circumferential wall of the tank body 2, and if they collide, sparks may occur and may even cause a fire. There were concerns raised about this.

In fact, in the case of the Japan Sea Chubu-Oki Earthquake, it is estimated that the protrusions on the outer periphery of the floating roof 1 and the inner periphery wall of the tank body 2 collided with each other, resulting in a fire caused by sparks. In any case, it is said that the presence of protrusions on the inner peripheral wall surface of the tank body 2 and the outer peripheral surface of the floating roof 1 poses a safety problem.

(Structure of the invention) The present invention solves these conventional problems and
We have devised a fire extinguishing system that is safe and effective in extinguishing fires in the early stages.

In the present invention, the inner end is rotatably fixed to the upper surface near the outer periphery of the floating roof 1 that covers the upper space of the seal part 3 that seals between the outer periphery of the floating roof 1 and the inner peripheral wall surface of the tank body 2. A rain shield plate 4 whose end is in contact with the inner circumferential wall of the tank body 2, and a pack-like container 5 made of thermoplastic resin fixed to the back surface of the rain shield plate 4.
Then, a fire extinguishing agent 6 is sealed inside the pack-like container 5, and when the pack-like container 5 is torn by the heat and flames of the fire, the fire extinguishing agent 6 inside is released into the lower space to extinguish the fire. It is characterized by the fact that it has been formed.

More specifically, in an example, Fig. 2 shows a pack-like container 5 made of thermoplastic resin filled with a fire extinguishing agent 6 and sealed. This uses a powder extinguishing agent consisting of, etc. And this,
It is designed to be assembled by fixing screws to the back side of the rain shield plate 4. Reference numeral 10 indicates a mounting hole for screwing in the ear piece of the container 5, and FIG. 3 is a perspective view showing the state in which the pack-like container 5 containing the extinguishing agent 6 is sealed on the back side of the rain shield plate 4.

(Function and Effect of the Invention) As understood from the above-described configuration, the present invention provides a fire extinguishing agent 6 in a capsule or pack-shaped container 5 made of thermoplastic resin on the back surface, that is, the lower surface, of the rain shield plate 4. Since the structure is sealed, filled and assembled, there are no protrusions interposed between the outer circumference of the floating roof 1 and the inner circumferential wall of the tank body 2, and therefore the floating roof 1 does not oscillate in the event of an earthquake. Even if
There is no fear that the fire extinguishing device itself will collide with the inner circumferential wall of the tank body 2, and there is no chance of vapor igniting due to sparks.

If the seal part 3 ignites for some reason, the extinguishing agent 6 above the seal part 3
The pack-like container 5 made of thermoplastic resin filled with the fire is ruptured by the heat and flames of the fire, and the extinguishing agent 6 inside the pack-like container 5 is released into the space below to play the role of initial extinguishing. It is something that will be fulfilled.

Furthermore, the present invention allows the rain shield plate 4 to be rotated to facilitate maintenance, inspection, and replacement of the pack-like container 5 in which the fire extinguishing agent 6 is sealed and fixed to the back surface.

As described above, the fire extinguishing device of the sealed part of the floating roof tank according to the present invention is safer than conventional fire extinguishing devices, and the initial extinguishing operation is properly ensured, making it extremely effective as a safety device. .

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the attachment part of a conventional sealed fire extinguishing device, Fig. 2 is a partially cutaway perspective view of a container filled with a fire extinguishing agent constituting the device of the present invention, and Fig. 3
The figure is a perspective view showing the attachment part of the device of the present invention. 1...Floating roof, 2...Tank body, 3...Seal part, 4...Rain shield plate, 5...Pack-shaped container,
6... Extinguishing agent, 7... Spray nozzle, 8... Fire extinguishing piping, 9... Bracket, 10... Mounting hole.

Claims (1)

[Scope of utility model registration request] In a floating roof type tank for storing a flammable liquid, a rotating material is attached to the upper surface near the outer periphery of the floating roof 1 that covers the upper space of the seal part 3 that seals between the outer periphery of the floating roof 1 and the inner peripheral wall surface of the tank body 2. A rain shield plate 4 formed by freely fixing an inner end and having an outer end in contact with the inner circumferential wall of the tank body 2, a pack-shaped container 5 made of thermoplastic resin fixed to the back surface of the rain shield plate 4, and a pack-shaped container 5 made of thermoplastic resin fixed to the back surface of the rain shield plate 4. A fire extinguishing agent 6 is sealed inside a container 5, and the pack-like container 5 is ruptured by the heat and flames of the fire, and the fire extinguishing agent 6 inside is released into the lower space to extinguish the fire. A fire extinguishing system for the seal part of a floating roof tank.