JP2587984B2 - Fire extinguisher for floating roof storage tank - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for promoting fire extinguishing by efficiently introducing a fire-extinguishing liquid between a floating roof and a storage tank side plate when a floating roof storage tank fire occurs. It is.

(Prior Art) FIG. 7 shows a conventional example of a floating roof type storage tank fire extinguisher.

In FIG. 7, the floating roof (1) is configured to be in contact with the storage tank side plate (3) with the sealing device (2) interposed therebetween, and always shut off the storage liquid and the atmosphere even when the floating roof (1) moves. ing.

In addition, a weir plate (11) is provided on the atmosphere side surface of the floating roof (1) at a certain distance from the storage tank side plate (3) so as to protrude vertically, and an upper end of the storage tank side plate (3) is provided. The foamy, liquid or gaseous fire extinguishing liquid spouting from the fire extinguisher (5) provided on the rim holds the storage tank side plate (3) and the dam (1).
It is formed so as to collect between the width-shaped circumferential grooves formed in 1) and 2).

In addition, a rain shield (4) near the outer edge of the floating roof (1)
And the rain shield plate (4) is formed so as to cover just the sealing device (2).

In other words, the fire extinguishing liquid that has erupted from the fire extinguisher (5) at the time of the fire falls down along the storage tank side plate (3), is protected by the rain baffle (4), and the weir plate (11) on the floating roof (1). It is blocked by the peripheral groove between the width-shaped circumferential grooves, and the entire space between the storage tank side plate (3) and the crest plate (11) at the upper part of the sealing device (2) is closed to extinguish the fire or the sealing device. (2) It is formed so as to gradually enter the portion and extinguish the fire.

(Problems to be Solved by the Invention) In the fire extinguisher of the floating roof type storage tank in the conventional example, since the seal device portion for directly blowing out the fire when a fire occurs is covered with a rain shield, the fire extinguishing liquid from the fire extinguisher is There is a problem that it cannot easily enter the sealing device.

There is a problem that the better the performance of the rain shield and the better the effect of removing rainwater, the more the fire extinguishing liquid in the event of a fire is blocked.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a rain shield plate covering between the outer periphery of a floating roof and a storage tank side plate. Is formed so as to be opened by being rotated with respect to the base point.

(Function) The fire-extinguishing fire-extinguishing liquid intrudes into the sealing device portion without being hindered by the rain shield, seals the gap between the outer periphery of the floating roof and the storage tank side plate, and promotes early fire-extinguishing.

(Example) An example will be described with reference to the drawings.

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

In FIG. 1, a floating roof (1) is a lid having a circular flat plate shape, and a sealing device (2) is provided on an outer peripheral edge.

The floating roof (1) is provided so as to be in contact with the inner peripheral surface of the cylindrical storage tank side plate (3) by the sealing device (2).

That is, the stored liquid in the storage tank is completely shut off from the atmosphere by following the movement of the floating roof (1) by the sealing device (2) formed of an elastic material such as synthetic rubber.

The rain shield (4) has its lower end pivotally connected to a mounting table (21) fixed to the floating roof (1) near its outer peripheral edge, and its upper end is in contact with the storage tank side plate (3). Form. Also, the rain shield (4) is formed so as to cover the entire periphery of the upper part of the sealing device (2) with a rectangular flat plate formed by connecting a plurality of rain shields.

In addition, the fire protection device (5)
(4)
Is connected to the upper surface of the rain shield plate (4) for each block by a connecting member (6), for example, a pipe material or a width plate so that each rectangular flat plate is integrated. A suitable number of unit hooks (7) at the position of the connecting member (6) suitable for lifting the rain shield (4)
And a wire (8) is attached to the unit hook (7).

In other words, the wind-up of the wire (8) causes the rain shield (4) to rotate about the mount (21) as a base point, that is, to rotate around the point of connection with the mount (21), thereby causing the storage tank side plate to rotate. The contact edge with (3) is opened, and conversely, the rain shield plate (4) is restored by rewinding the wire (8), and the outer peripheral edge is formed so as to contact the inner peripheral surface of the storage tank side plate (3). I do.

The wire (8) is actuated by an air driving device (20) via a plurality of pulleys (9) provided on the upper end surface of the weir plate (11) and the side surface of the weir plate (11) on the center side of the storage tank. It is formed so as to be wound by a winding drum (10).

In this case, the mounting position of the pulley (9) is different from the upper end surface of the weir (11), for example, the weir (11) and the rain shield (4).
Alternatively, it may be provided on a mount provided at a position in the middle of the above or at a position closer to the center of the storage tank from the weir plate (11).

That is, when a fire occurs in the floating roof type storage tank, the fire breaks the sealing device (2) formed of a rubber material or the like,
It gushes from the damaged part.

In the erupted fire, as shown in FIG. 2, the sprinkler head (13) provided with the fuse metal of the heat sensitive device (12) disposed close to the top of the sealing device (2) was opened, and the Halon tank was opened. (15) The pressurized primary fire extinguishing gas, Halon gas, is blown out through the Halon pipe (14).
At the same time, the pressure inside the halon tank (15) is reduced.

The pressure drop in the halon tank (15) lowers the valve stem of the operating valve (16), opens the inlet valve (18) of the air pressurized tank (17), and drives the air drive (20) through the air pipe (19) To rotate the winding drum (10). In this case, the pressure change of the operating valve (16) is communicated with the fire extinguisher (5) so as to be transmitted so as to jet the fire extinguishing liquid.

Also, in this case, when the fire extinguisher (5) is to be preferentially operated by a manual operation instead of an automatic operation by the heat-sensitive device (12), the air pressurized tank (17) is linked directly with the fire extinguisher (5). The air drive device (20) may be operated by opening the inlet valve (18).

FIG. 3 is an explanatory view showing a second embodiment of the present invention, and FIG. 4 is a detailed view of a portion A in FIG.

In the figure, (4) is a rain shield, (21) is a mounting stand, (22) is a spring, (23) is a compression spring, and (24) is a binder.

The rain shield (4) connects two crimp springs (23) in a row through a bonding material (24) made of bimetal, fuse metal or shape memory alloy, and has one end connected to the floating roof (1). The other end is engaged with a stopper (25) provided, and the other end is engaged with a hook (26) provided on the back surface of the rain shield (4). ) Is formed so as to be in close contact with the inner peripheral surface of FIG. In this case, one crimp spring (23) and the bonding material (24) are connected,
One end is engaged with a stopper (25) provided on the floating roof (1),
The other end may be formed by engaging a hook (26) provided on the back surface of the rain shield (4).

Also, the rain shield (4) and the mounting base (21) are raised and connected by a spring (22).

That is, the bonding material (24) detects the heat due to the fire, the bonding material (24) extends or melts, and falls off. Is formed so that the rain shield (4) is caused by the elastic force of (1).

 FIG. 5 is an explanatory diagram showing a third embodiment.

A direct pull spring (28) formed of a memory alloy connects between a direct pull stop (31) provided on the floating roof (1) and a direct pull hook (32) provided at the lower end of the rain shield (4). . The direct pulling spring (28) is normally slackened so as not to wait for a tensile force, and the outer peripheral edge of the rain shield (4) is not restrained by the direct pulling spring (28) and its own weight causes the storage side plate ( It is formed so as to be in close contact with the inner peripheral surface of 3).

That is, the direct pull spring (28) is directly operated and contracted by the heat of the fire to form the rain shield (4).

In other words, the rain shield (4) is compressed by the contraction force of the direct spring (28).
Is formed so as to be rotated about the attachment point of the mounting base (21).

 FIG. 6 is an explanatory diagram showing a fourth embodiment.

A crimping weight (29) is connected to a hanging bracket (33) provided on the back surface of the rain shield (4) via a connector (27) made of bimetal, fuse metal or shape memory alloy.

In other words, the outer peripheral edge of the rain shield plate (4) is formed so as to be in close contact with the inner peripheral surface of the storage tank side plate (3) at normal times due to the weight of the pressure bonding weight (29).

Also, the lower end of the rain shield (4), that is, the mounting base (2
A lifting weight (30) is provided at the rear of the fulcrum away from the storage tank side plate (3) with reference to the support connection point of 1).

In the fourth embodiment, the rain shield (4) is formed so as to be rotated with the weight of the lifting weight (30) as a base point of the mounting connection point (21).

That is, the connector (27) is extended and dropped by the heat of the fire, the crimping weight (29) is dropped, and the weight of the raising weight (30) at the rear of the fulcrum is used to form the rain shield (4).

In this case, the pressure bonding weight (29) is formed in a bag filled with the fire extinguishing liquid, and the bag is broken by flame or heat at the upper center of the sealing device (2) so that the fire extinguishing liquid falls and the primary fire is extinguished. It may be formed.

(Effect of the Invention) Since the present invention is configured as described above, the following effects are produced.

Since the fire extinguishing liquid flows in an open state by raising the rain shield, it can be directly introduced into the seal device in a large amount and at an early stage, and the flame in the storage tank can be extinguished quickly.

Further, in the first embodiment, since the rotation of the rain shield can be performed manually and automatically, the operation confirmation test and the maintenance management become easy.

In the second embodiment, it is possible to improve the close contact accuracy between the outer peripheral edge of the rain shield plate and the inner peripheral surface of the storage tank side plate by adjusting the elastic force of the compression spring and the inducing spring, thereby improving the effect of removing rainwater. Become.

In the third embodiment, the number of components is small, and the mounting operation is easy.

In the fourth embodiment, since the rain shield is rotated by gravity, the operation is reliable even after many years, and the primary fire can be extinguished by using the press-fitting weight filled with the fire extinguishing liquid.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view of a floating roof type storage tank provided with a fire extinguishing promotion device according to a first embodiment of the present invention, and FIG. 2 is an explanatory view of an automatic fire extinguishing operation in the first embodiment. FIG. 3, FIG. 3 is a cross-sectional explanatory view showing the second embodiment, FIG. 4 is a detailed view of a portion A in the cross-sectional explanatory view showing the second embodiment, and FIG.
FIG. 6 is a cross-sectional explanatory view showing a fourth embodiment, and FIG. 7 is a perspective cross-sectional explanatory view of a floating roof type storage tank with a part removed, showing one of the conventional examples. 1 ... Floating roof, 5 ... Fire extinguisher 3 ... Storage tank side plate, 21 ... Mounting stand 4 ... Rain shield

Claims (1)

(57) [Claims] 1. A fire extinguisher provided in a floating roof type storage tank,
A rain shield that covers the space between the outer edge of the floating roof and the tank side plate,
A fire extinguishing promotion device for a floating roof type storage tank characterized in that the fire extinguishing solution is spouted when a fire occurs and the mounting base is rotated to open as a base point.