JP2831330B2 - Pipe joint structure for gas fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention releases a gas fire extinguishing agent stored in a fire extinguishing agent storage container into a fire extinguishing target compartment, and maintains the concentration of the fire extinguishing agent in the fire extinguishing target compartment equal to or higher than the flame-extinguishing concentration. More specifically, the present invention relates to a pipe joint structure used in a gas fire extinguishing system that extinguishes a fire by using a gas connecting a container valve of a fire extinguishing agent storage container and a connecting pipe of a collecting pipe extending above the fire extinguishing agent storage container. The present invention relates to a pipe joint structure for fire extinguishing equipment.

[0002]

2. Description of the Related Art Conventionally, a gas fire extinguishing system has been used as a gas fire extinguishing system in which a gas fire extinguishing agent is discharged into a fire extinguishing target compartment and the concentration of the fire extinguishing agent in the fire extinguishing target extinguishing is maintained at a level higher than the flame-extinguishing concentration. Those using gases such as carbon dioxide and halon gas have been put to practical use.

[0003] When a gas such as carbon dioxide or halon gas is used as a gas fire extinguishing agent, as shown in FIG.
1 and stored in the gas fire extinguishing system 102, and in the event of a fire, appropriate electric or pneumatic means 10
3 to open the container valve 104 of the fire extinguishing agent storage container 101, thereby sending carbon dioxide and halon gas from the fire extinguishing agent storage container 101 to the injection head via piping such as the conduit 105 and the collecting pipe 106, and From the fire extinguishing target compartment. At this time, gases such as carbon dioxide and halon gas are sent to the injection head in a liquid state, and are vaporized at the moment when they are discharged from the injection head into the fire extinguishing target compartment, become a gaseous state, and fill the fire extinguishing target compartment. To quell the fire.

[0004] Gas fire extinguishing equipment that uses these gases such as carbon dioxide and halon gas can rapidly suppress the fire, hardly contaminates the fire extinguishing agent in the fire extinguishing agent, and does not impair the electrical insulation. The advantage is that the fire extinguishing agent can penetrate through gaps and exhibit a strong fire-extinguishing effect even for fire-extinguishing objects with a complicated structure, and that the fire extinguishing agent has a constant fire extinguishing ability over a long period without aging. It is widely used not only for petroleum-related facilities and electric facilities, but also for general facilities.

However, in recent years, a problem relating to destruction of the ozone layer has been raised on a worldwide scale, and production of fire extinguishing agents containing halogenated hydrocarbon components such as halon gas was discontinued in January 1994. It is virtually unusable.

[0006]

Gas fire extinguishing systems using fire extinguishing agents other than carbon dioxide and halon gas include perfluoroalkanes (perfluorobutane (C4F10)) which do not destroy nitrogen gas and the ozone layer, and hydrogen Fluoroalkane (trifluoromethane (CHF
3), heptafluoropropane (C3HF7)) (hereinafter,
These are collectively referred to as "fluorine compounds". ) Is used as a fire extinguishing agent.

When this fluorine compound is used as a fire extinguishing agent for gas fire extinguishing equipment, the amount of fire extinguishing agent required to extinguish a fire extinguisher in the same volume of fire extinguisher is larger than when using halon gas. Since it is necessary to release the agent in a short time, compared to the case of halon gas, the conduit 10
5. It is necessary to increase the capacity of the piping such as the collecting pipe 106.

[0008] In addition, even when conventionally used carbon dioxide or nitrogen gas which has recently attracted attention as a fire extinguishing agent for gas fire extinguishing equipment, the extinguishing agent can be released in a shorter time. It is necessary to increase the capacity of the pipes such as the conduit 105 and the collecting pipe 106 for this purpose.

By the way, a conduit 105 for connecting the fire extinguishing agent storage container 101 and the collecting pipe 106 has a fire extinguishing agent storage container 1.
In order to adjust the connection state for each fire extinguisher storage container 101 for reasons such as dimensional accuracy of 01 and low installation accuracy,
A flexible tube with nuts at both ends is used, and this flexible tube usually has
A stainless steel wire was wound around the outer periphery of a stainless steel bellows tube, and the outer periphery was covered with a braided braided stainless steel wire called a braid. And the maximum working pressure of 110 kg, which has been widely used in the past
In the case of a flexible tube having f / cm ² and an inner diameter of about 10 mm, the minimum bending radius thereof is about 30 mm. This is because the fire extinguisher storage container 101 and the collecting pipe 106 are approximately within the plane of the fire extinguisher storage container 101. It could be connected. However, from the above request, if the inner diameter of the conduit 105 is increased in order to increase the capacity of the piping such as the conduit 105 and the collecting pipe 106 (the same applies to the case where the maximum operating pressure is increased), the stainless steel It is necessary to increase the strength of the stainless steel wire wound around the outer periphery of the bellows tube and the strength of the blade covering the outer periphery, thereby increasing the minimum bending radius of the flexible tube. For example, the maximum working pressure is 110 kgf / cm ² , and the inner diameter is 20 mm.
In the case of a flexible tube of the order, the minimum bending radius is about 70 mm, so the fire extinguisher storage container 101
It is difficult to connect the fire extinguisher storage container 101 and the collecting pipe 106 within the plane range of the above, and even more, the maximum operating pressure 110 kgf / cm ² , the use of which is currently considered,
In the case of a flexible tube having an inner diameter of about 40 mm or a flexible tube having a maximum working pressure of more than 110 kgf / cm ² , an extremely large gas is required due to the conduit 105 connecting the fire extinguisher storage container 101 and the collecting pipe 106. There is a problem that the space for the fire extinguishing equipment 102 must be ensured, and the length of the flexible tube to be used becomes longer, which increases the construction cost of the gas fire extinguishing equipment.

The present invention solves the above-mentioned problems of the conventional flexible tube, makes it possible to easily connect the fire extinguisher storage container and the collecting pipe in a small space, and increases the capacity of the conduit. It is an object of the present invention to provide a pipe joint structure for gas fire extinguishing equipment, which can eliminate restrictions on increasing the pressure resistance.

[0011]

In order to achieve the above object, a pipe joint structure for gas fire extinguishing equipment according to the present invention comprises a container valve for a fire extinguishing agent storage container and a collecting pipe extending above the fire extinguishing agent storage container. In the pipe joint structure for gas fire extinguishing equipment for connecting to a connection pipe, a tube portion of a flexible tube having 90 ° elbows disposed at both ends is bent at a required angle, and one 90 ° elbow is used as a container valve of a fire extinguishing agent storage container. The other 90 ° elbow is directly connected to the connecting pipe of the collecting pipe.

In this case, the two 90 ° elbows can be disposed in the tube portion of the flexible tube by shifting the open end of the other 90 ° elbow by a required angle with respect to the open end of one 90 ° elbow.

In the pipe joint structure for gas fire extinguishing equipment of the present invention, the tube portion of the flexible tube is bent at a required angle, specifically, for example, at an appropriate angle in the range of 60 ° to 120 °. The 90 ° elbow is directly connected to the container valve of the fire extinguishing agent storage container, and the other 90 ° elbow is directly connected to the connecting pipe of the collecting pipe, so that the fire extinguishing agent storage container and the collecting pipe are narrow and simple. Can be connected to

In general, the central axis of the open end of the container valve of the fire extinguishing agent storage container and the central axis of the open end of the connecting pipe of the collecting pipe are:
In many cases, there is a twisted positional relationship due to the operation of the container valve of the fire extinguishing agent storage container. In this case, the opening end of one 90 ° elbow is connected to the opening end of the other 90 ° elbow. By disposing the two 90 ° elbows at the required angle, specifically, for example, at an appropriate angle in the range of 5 ° to 30 °, at the tube portion of the flexible tube, the opening ends of the two 90 ° elbows can be adjusted. The position can be substantially adapted to the position of the respective open ends of the container valve of the extinguishing agent storage container and the connecting pipe of the collecting pipe extending above the extinguishing agent storage container, The storage container and the collecting pipe can be easily connected in a smaller space.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pipe joint structure for gas fire extinguishing equipment of the present invention will be described below based on the illustrated embodiment.

As shown in FIGS. 1 to 3, this gas fire extinguishing system stores a fire extinguishing agent such as a fluorine-based compound in a gas extinguishing agent storage container 1 in a state filled in a fire extinguisher storage container 1 and fires a fire. At this time, appropriate electric means or pneumatic means (not shown)
The fire extinguishing agent is sent from the fire extinguishing agent storage container 1 to the injection head through the pipes such as the conduit 5 and the collecting pipe 6 by opening the container valve 4 of the fire extinguishing agent storage container 1 by using The gas is discharged into the compartment, and its basic structure is the same as that of a conventional gas fire extinguishing system.

By the way, the connecting valve 6 of the container valve 4 of the fire extinguishing agent storage container 1 and the collecting pipe 6 extending above the fire extinguishing agent storage container 4.
1 are connected to the conduit 5 so that the connection state can be adjusted for each fire extinguishing agent storage container 1 by 90 ° elbows 5 at both ends.
A flexible tube 50 provided with 1, 52 is used. 90 ° elbows 51, 5 of flexible tube 50
2 employs union joints 51a, 52a, respectively.
More specifically, one 90 ° elbow 51 directly connected to the container valve 4 of the fire extinguishing agent storage container 1 is a union screw, and the other 90 ° elbow 52 directly connected to the connecting pipe 61 of the collecting pipe 6 is a union nut. Although they are respectively configured, the types of these joints are not limited to those of the present embodiment, and the types of the joints are determined according to the container valve 4 of the fire extinguishing agent storage container 1 and the connecting pipe 61 of the collecting pipe 6. Any type of fitting can be used. As the tube portion 53 of the flexible tube 50, one having both good flexibility and high pressure resistance is used. Specifically, as shown in detail in FIG. 3, the outer periphery of a stainless steel bellows tube 53a is used. It is preferable to use a stainless steel wire 53b wound around it, and further, the outer periphery thereof is covered with a braided stainless steel wire 53d called a braid. In this case, the 90 ° elbows 51 and 52 of the flexible tube 50 and the tube portion 53 are connected to the 90 ° elbows 51 and 52 and the bellows tube 53a.
Are welded, and the blade holders 51b, 52b welded to the base ends of the 90 ° elbows 51, 52, respectively, are caulked to be integrated.

In connecting the container valve 4 of the fire extinguishing agent storage container 1 and the connecting pipe 61 of the collecting pipe 6 extending above the fire extinguishing agent storage container 1 using the flexible tube 50, the container valve 4 is mainly used. In accordance with the difference between the height of the open end of the flexible tube 50 and the height of the open end of the connecting pipe 61 of the collecting pipe 6, the required angle θ1, specifically, in the range of 60 ° to 120 °. By bending the 90 ° elbows 51 and 52 by an appropriate angle, the positions of the open ends of the two 90 ° elbows 51 and 52 are positioned so as to approximately match the positions of the open ends of the container valve 4 and the connecting pipe 61 of the collecting pipe 6. I do.

Further, usually, the central axis O1 of the open end of the container valve 4 of the fire extinguishing agent storage container 1 and the central axis O2 of the open end of the connecting pipe 61 of the collecting pipe 6 correspond to the operation of the container valve 4, especially manual operation. In order to facilitate the operation, the connection pipes 6 are twisted (the connection pipes 6 projecting in a horizontal direction at right angles to the collecting pipes 6 extending in parallel with the parallel direction of the fire extinguishing agent storage containers 1).
1 is not perpendicular to the central axis O2 of the open end and the direction in which the fire extinguishing agent storage container 1 is arranged, but has a predetermined angle.
The central axis O1 of the opening end of the container valve 4 disposed in the horizontal direction is not in the same plane. Therefore, in this case, the opening end of one 90 ° elbow 51 is previously set to the other 90 °. The 90 ° elbows 51 and 52 are disposed in the tube portion 53 of the flexible tube 50 by shifting the open end of the elbow 52 by a required angle θ2, specifically, an appropriate angle in the range of 5 ° to 30 °. Thereby, the positions of the open ends of the two 90 ° elbows 51 and 52 are positioned so as to approximately match the positions of the open ends of the container valve 4 and the connecting pipe 61 of the collecting pipe 6.

The height of the opening end of the container valve 4 of the fire extinguishing agent storage container 1 is usually 50 m between the plurality of fire extinguishing agent storage containers 1 because the dimensional accuracy of the fire extinguishing agent storage container 1 is low.
Although there is a tolerance of about m, this tolerance can be absorbed by using a flexible tube having a length of about 20 times the inner diameter of the flexible tube 50, and this pipe joint structure for gas fire extinguishing equipment is adopted. Thereby, the difference between the height of the opening end of the container valve 4 of the fire extinguishing agent storage container 1 and the height of the opening end of the connecting pipe 61 of the collecting pipe 6 can be set small, and the fire extinguishing agent storage container is combined. The length of the flexible tube required for connecting the one container valve 4 and the connection pipe 61 of the collecting pipe 6 can be reduced.

[0021]

The pipe joint structure for gas fire extinguishing equipment of the present invention
The tube portion of the flexible tube having 90 ° elbows at both ends is bent at a required angle and
0 ° elbow to the container valve of the fire extinguishing agent storage container and the other 90 °
Since the elbow is directly connected to the connecting pipe of the collecting pipe, the positions of the open ends of both 90 ° elbows can be easily adjusted by simple construction operation. The fire extinguisher storage container and the collecting pipe can be connected in a small space and easily in a small space, and can be easily connected to the end position. It satisfies the requirements of large capacity and high withstand pressure required when using a system compound or nitrogen gas. Also, shortening of the difference between the height of the opening end of the container valve of the fire extinguishing agent storage container and the opening end of the connecting pipe of the collecting pipe,
It is easy to shorten the length of the flexible tube required to connect the container valve of the fire extinguishing agent storage container and the connecting pipe of the collecting pipe, and to standardize the pipe joint structure, thereby reducing the construction cost of the gas fire extinguishing equipment. .

Further, the opening end of one 90 ° elbow is shifted from the opening end of the other 90 ° elbow by a required angle,
In the case where a structure in which both 90 ° elbows are arranged in the tube portion of the flexible tube is adopted, the central axis of the opening end of the container valve of the fire extinguishing agent storage container is gathered due to the operation of the container valve of the fire extinguishing agent storage container. Even if the center axis of the open end of the connecting pipe of the pipe is set in a twisted positional relationship, the positions of the open ends of both 90 ° elbows are set to the open ends of the connecting pipes of the container valve of the fire extinguishing agent storage container and the collecting pipe. Can be positioned so as to substantially match the position of the fire extinguisher storage container and the collecting pipe can be connected in a smaller space and more easily.

[Brief description of the drawings]

FIG. 1 shows an example of a gas fire extinguishing system to which a pipe joint structure for a gas fire extinguishing system of the present invention is applied, wherein (a) is a plan view and (b) is a front view.

FIG. 2 is a sectional view showing a main part of a pipe joint structure for gas fire extinguishing equipment of the present invention.

3A and 3B show a flexible tube used in the pipe joint structure for gas fire extinguishing equipment of the present invention, wherein FIG. 3A is a front view and FIG.
Is a bottom view, and (c) is an enlarged view of a portion A in (a).

FIG. 4 shows a conventional gas fire extinguishing system, (a) is a front view,
(B) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire extinguisher storage container 4 Container valve 5 Conduit 50 Flexible tube 51 90 ° elbow 52 90 ° elbow 53 Tube part 6 Collecting pipe 61 Connecting pipe

Claims (2)

(57) [Claims] 1. A pipe joint structure for a gas fire extinguishing system for connecting a container valve of a fire extinguishing agent storage container and a connecting pipe of a collecting pipe extending above the fire extinguishing agent storage container, wherein 90 ° elbows are provided at both ends. The flexible tube is bent at a required angle, and one 90 ° elbow is directly connected to the container valve of the fire extinguishing agent storage container, and the other 90 ° elbow is directly connected to the connecting pipe of the collecting pipe. Pipe joint structure for fire extinguishing equipment. 2. An opening end of one 90 ° elbow is shifted by a required angle from an opening end of the other 90 ° elbow.
2. The pipe joint structure for gas fire extinguishing equipment according to claim 1, wherein the elbow is disposed at a tube portion of the flexible tube.