JPH0311015Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the installation structure of a sprinkler head of an automatic fire extinguishing system that automatically spews out extinguishing liquid in case of a fire in the seal part of a floating roof tank caused by earthquakes, lightning strikes, etc. This provides a mounting structure that will not be damaged especially by earthquakes and can be easily maintained and inspected on a daily basis.

As is well known, the floating roof of a floating roof type tank is in sliding contact with the inner surface of the tank side wall via a sealing body.
It rises and falls in response to the up and down movement of the liquid level due to the receiving and discharging of stored liquid.

When a large-scale earthquake occurs and large vibrations are applied to the tank, the floating roof shakes violently as the stored liquid sways. At this time, the seal body and the inner surface of the tank slide, generating abnormal frictional heat and causing a fire in that area.If the shaking is severe, the seal body of the floating roof may be damaged, and the floating roof The metal member directly collided with the side wall, and the sparks generated at that time ignited the stored liquid and its vaporized gas that overflowed into the upper part of the sealing body, potentially causing a large fire.

As a countermeasure against this, conventionally, in the event of a fire occurring in the seal part, a seal part fire extinguishing device as shown in FIG. 1 has been installed to extinguish the fire quickly and effectively in the initial stage. That is, in FIG. 1, the extinguishing agent is delivered into the circumferential space 6 enclosed by the seal body 3 suspended on the outermost edge of the pontoon 2 of the floating roof 1, the tank side plate 4, and the rain cover plate 5. A ring-shaped extinguishing agent pipe 7 is provided, and 2 or 3
A large number of sprinkler heads 8 are installed at predetermined intervals of m to eject extinguishing agent in the event of a fire. Here, the ring-shaped extinguishing agent pipe 7 is placed inside the circumferential space 6 on an L-shaped support 9 protruding from the outer edge of the pontoon 2 .

The spout of the sprinkler head 8 is connected to the seal body 3.
It is oriented in the direction of , and during normal times the ejection port is sealed with low-temperature fusible metal.

When a fire occurs in the seal, the heat of combustion melts the low-temperature fusible metal, opening the nozzle, and
At the same time, the system is designed to eject extinguishing agent by accumulating pressure in the extinguishing agent.

In the case of this conventional structure, the ring-shaped fire extinguishing agent pipe 7 and the sprinkler head 8 are attached to the support 9 that protrudes from the outer edge of the pontoon 2 in the direction of the tank side plate 4, so the floating roof may be damaged due to a major earthquake or typhoon. When the tank 1 swings, it collides with the tank side plate 4 and is damaged, resulting in a fatal defect in that the tank side plate 4 completely loses its function. Furthermore, fire extinguishant piping 7
Since both the sprinkler head 8 and the sprinkler head 8 are housed within the circumferential space 6, when replacing the head or performing maintenance and inspection on the piping, work cannot be carried out unless all the rain cover plates 5 are removed in advance, and restoration requires a great deal of effort. There were some drawbacks that required it.

The present invention was made to solve the above-mentioned drawbacks, and its gist is to arrange a ring-shaped extinguishing agent pipe on the top of the floating roof outside the circumferential space, and to connect the ring-shaped extinguishing agent pipe to the top of the floating roof. A sprinkler head is attached to the tip of the branched flexible heat-resistant and pressure-resistant hose via a detachable fitting, and a sprinkler head storage box is provided on the outside of the rain cover plate, and the sprinkler head integrated with the detachable fitting is attached to the rain cover plate. It can be attached to the storage box removably from the outside.

An example of implementing the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 11 denotes a floating roof having a donut-shaped pontoon 12 on its peripheral edge, which moves up and down in response to receiving and discharging stored liquid.

13 is a seal body suspended on the outer edge of the pontoon 12 so as to be in sliding contact with the inner surface of the tank side plate 14;
This is to prevent the stored liquid from volatilizing when the floating roof 1 moves up and down. A rain cover plate 15 is provided to cover the seal body 13, and has the function of preventing rainwater flowing down the inner surface of the tank side plate 14 from entering the seal portion.

The lower end of the rain shield plate 15 is pivoted on the pontoon 12 as shown in the figure, and the upper end is made of a single piece that slides into contact with the inner surface of the tank side plate 14, and a large number of these plates are successively arranged on the periphery of the floating roof. Reference numeral 17 denotes a ring-shaped fire extinguishing agent pipe arranged in an annular shape on the floating roof 11 outside the rain cover plate 15. In the drawing, an example is shown in which it is fixed to the upper surface of the pontoon 12 via a support 19.

Reference numeral 20 denotes a flexible heat-resistant and pressure-resistant hose connected to branch points at predetermined intervals of the extinguishing agent pipe 17, and the sprinkler head 1 is connected to the tip of the hose through a detachable fitting 21.
8 is installed.

On the other hand, a storage box 23 having a seat 22 for fastening the attachment/detachment fitting 21 and housing the sprinkler head 18 is provided protruding from the outside of the rain cover plate 15. The depth of the storage box 23 is the same as that of the sprinkler head 1.
8 is installed, the tip of the head is covered with rain shield plate 15
Preferably, it does not protrude from the inner surface.

Further, the shape of the storage box 23 may be a cylindrical shape so that the heat of the flame can be easily detected when a fire occurs in the seal part, that is, a shape that can easily guide the flame to the low-temperature fusible metal part of the sprinkler head 18. The shape can be arbitrarily selected from rectangular parallelepiped, cone, pyramid, etc. Furthermore, maintenance and replacement can be facilitated by incorporating a valve 24 in the middle of the flexible heat-resistant and pressure-resistant hose 20 that branches the extinguishing agent from the extinguishing agent pipe 17 in preparation for replacing the sprinkler head 18.

Also, attach the detachable fitting 21 to the fastening seat 22 of the storage box 23.
The storage box 23 is inclined at a certain angle with respect to the rain shield plate as shown in the figure, so that when the sprinkler head 18 is tightened, the spout of the sprinkler head 18 is directed toward the sealing part and fire extinguishing agent is effectively discharged. It is better to do this.

According to the present invention, the fire extinguishing agent pipe 17 is connected to the rain cover plate 1.
Since the sprinkler head 18 is arranged on the floating roof on the outside of the rain cover plate 5, and the sprinkler head 18 is also structured so that it can be easily attached and removed from the outside of the rain cover plate 15, maintenance and inspection work such as replacing and cleaning the sprinkler head 18 is extremely easy. It has the effect of Further, even if a major earthquake occurs and the floating roof 11 collides with the tank side plate 14, the extinguishing agent pipe 17 and the sprinkler head 18 will not be damaged, and the fire extinguishing function can be ensured.

That is, the sprinkler head 18 is integrally fixed to the rain shield plate 15, so that even if the floating roof 11 collides with the tank side plate 14 due to an earthquake, the rain shield plate 15 will not pivot as shown by the imaginary line in FIG. Collision with the side plate can be avoided by rotating towards the center of the tank around the mounting part. Since the displacement of the sprinkler head 18 and the fire extinguisher pipe 17 at that time is absorbed by the flexible hose, no unreasonable load is applied to each other.

As is clear from the above explanation, according to the mounting structure of the present invention, even if the floating roof shakes violently due to a large earthquake and the floating roof collides with the tank side plate, the fire extinguishing sprinkler head and The use of the structure of the present invention significantly improves the safety of floating roof tanks, since the fire extinguishing function can be maintained without damaging the auxiliary equipment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional mounting structure for a sprinkler head of a floating roof tank, and FIG. 2 is a sectional view showing an embodiment of the mounting structure of the present invention. 1, 11... Floating roof, 2, 12... Pontoon, 3, 13... Seal body, 4, 14... Tank side plate, 5, 15... Rain cover plate, 6, 16... Circumferential space, 7 , 17... Ring-shaped extinguishing agent piping, 8, 1
8...Sprinkler head, 9, 19...Support, 20...Flexible heat-resistant and pressure-resistant hose, 21...
Detachable fitting, 22...Tightening seat of detachable fitting, 23...
Storage box, 24...motoben.

Claims (1)

[Scope of utility model registration request] A fire extinguishing agent pipe is installed in a circular shape on the floating roof outside the rain shield plate, and a sprinkler head is attached to the tip of a flexible heat-resistant and pressure-resistant hose that is branched from the required point of the pipe and connected via a detachable fitting. A sprinkler head storage box with a mounting seat for a removable fitting that is inclined at a certain angle to the rain cover plate so that the fire extinguishing agent outlet of the sprinkler head is directed toward the seal part, is attached to the rain cover plate corresponding to the above-mentioned branch position. A structure for installing a sprinkler head for fire extinguishing on a floating roof seal part, characterized in that a sprinkler head that projects outwardly and is integrated with a detachable fitting is detachably attached to the fastening seat of the storage box from the outside of the rain cover plate. .