JP2886815B2 - Pipe fittings 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. The present invention relates to a pipe joint used in a gas fire extinguishing system that extinguishes a fire.

[0002]

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

[0003] When a gas such as carbon dioxide or halon gas is used as a fire extinguishing agent, as shown in FIG. In the event of a fire, carbon dioxide or halon gas is released from the fire extinguishing agent by opening the container valve 4 of the fire extinguishing agent storage container 1 by using appropriate electric or pneumatic means 3 in the event of a fire. The water is sent from the storage container 1 to the ejection head via a pipe such as a conduit 5 and a collecting pipe 6, and is discharged from the ejection head into a fire extinguishing section. 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]

As a gas fire extinguishing system using a fire extinguishing agent other than carbon dioxide and halon gas, a perfluoroalkane (perfluorobutane (C ₄ F ₁₀ )) that does not destroy nitrogen gas or the ozone layer is used. , Hydrogenofluoroalkane (trifluoromethane (CHF
₃ ), heptafluoropropane (C ₃ HF ₇ )) (hereinafter, referred to as
These are collectively referred to as "fluorine compounds". ) Is used as a fire extinguishing agent.

When a fluorine compound is used as a fire extinguishing agent for gas fire extinguishing equipment, the amount of fire extinguishing agent required for extinguishing a fire extinguisher in the same volume of fire extinguishing agent is greater than when using halon gas. Since it is necessary to release the gas in a short time, it is necessary to increase the capacity of the pipes such as the conduit 5 and the collecting pipe 6 as compared with the case of the halon gas.

Further, when nitrogen gas is used as a fire extinguishing agent for gas fire extinguishing equipment, since nitrogen gas is used under pressure and stored in a gaseous state, carbon dioxide stored in a pressurized and liquefied state is used. At the same filling pressure, the number of fire extinguisher storage containers required to extinguish a fire extinguisher in the same volume of fire extinguisher is greater than at the same filling pressure.To reduce the number of fire extinguisher storage containers, the fire extinguisher storage containers must be filled. It is necessary to increase the filling pressure of the gas fire extinguishing agent. However, when the filling pressure of the gas fire extinguishing agent is increased, the gas extinguishing agent is also applied to the pipes such as the conduit 5, the collecting pipe 6, the injection head, and other secondary devices. Since high gas pressure is applied, it is necessary to increase the pressure resistance grade of these secondary devices.

[0009] Among these secondary devices, the conduit 5 connecting the extinguishing agent storage container 1 and the collecting pipe 6 is provided with a conventional carbon dioxide or halon gas because the dimensional accuracy of the extinguishing agent storage container 1 is not good. In a gas fire extinguishing system using such a method, as shown in FIG. 6, a relatively easily bendable metal pipe such as copper or the like provided with nuts 51 and 52 at both ends capable of adjusting a connection state for each fire extinguisher storage container 1 is used. A flexible tube in which the outer periphery of the bellows tube was reinforced with a steel wire was used. However, when using a fluorine compound or nitrogen gas as a fire extinguishing agent for gas fire extinguishing equipment, as described above, it is necessary to increase the capacity of the conduit 5 or increase the pressure resistance. These requirements could not be sufficiently satisfied in terms of pressure resistance, flexibility, accuracy, ease of processing, compactness, cost, and the like when the capacity, that is, the diameter of the conduit was increased.

The present invention can be used in place of a metal pipe or a flexible pipe used in a gas fire extinguishing system, and is not restricted in increasing the capacity or increasing the pressure resistance. It is an object of the present invention to provide a pipe joint for gas fire extinguishing equipment having a property.

[0011]

In order to achieve the above-mentioned object, a pipe joint for gas fire extinguishing equipment according to the present invention has a connection part with a right-hand thread and a left-hand thread cut at both ends, and a rotary operation part on an outer peripheral surface. A length adjustment tube formed with a connection portion having a right-hand or left-hand thread that is screwed to a connection portion of the length adjustment tube at one end, and a rotary operation portion formed on the outer peripheral surface, and opening positions at both ends. The eccentric tube is formed of an eccentric tube formed so as to be eccentric, and a connecting tube formed on the outer peripheral surface of the other end of the eccentric tube and having a rotating operation portion.

[0012] The pipe joint for gas fire extinguishing equipment can be used as a collecting pipe for connecting the fire extinguishing agent storage containers or as a conduit for connecting the fire extinguishing agent storage container and the collecting pipe.

[0013] The pipe joint for gas fire extinguishing equipment according to the present invention adjusts the distance between the length adjusting pipe and the eccentric pipes arranged on both sides thereof by rotating the length adjusting pipe. Is set to a predetermined length, and the amount of displacement is adjusted by rotating eccentric tubes arranged on both sides of the length adjusting tube, so that the amount of displacement at both ends of the pipe joint for gas fire extinguishing equipment is set to a predetermined value. Set to a value.

[0014]

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

FIG. 1 shows a first embodiment of a pipe joint for gas fire extinguishing equipment according to the present invention. In this embodiment, the gas fire extinguishing equipment pipe joint 7 is used as a collecting pipe for connecting a plurality of fire extinguishing agent storage containers 1 to each other.

The pipe joint 7 for gas fire extinguishing equipment is provided with a length adjusting pipe 71 having connection portions 71a and 71b each having a right-hand thread and a left-hand thread cut at both ends, and is provided on both sides of the length adjusting pipe 71. The control tube 71 has right and left threaded connection portions 72a and 73a screwed to the connection portions 71a and 71b at one end, and the opening positions at both ends are eccentric (however, the opening end surfaces are parallel). The eccentric pipes 72, 73 are formed with pipes, and connecting pipes 74, 75 provided at the other ends of the eccentric pipes 72, 73. The connecting pipes 74, 75 are connected to the container valve 4 of the fire extinguishing agent storage container 1.
A plurality of fire extinguishing agent storage containers 1 are connected to each other by being screwed into a T-joint pipe 8 connected to the pipe.

In this case, on the outer peripheral surfaces of the length adjusting pipe 71, the eccentric pipes 72, 73 and the connecting pipes 74, 75, a rotating operation section 7 having a shape which can be easily operated by a suitable tool such as a spanner.
1c, 72c, 73c, 74a, and 75a are formed. The sliding surfaces of the length adjusting tube 71 and the eccentric tubes 72 and 73 are provided by O-rings 72b and 73b, and the contact surfaces of the eccentric tubes 72 and 73 and the T-joint tube 8 are provided by O-rings 8a and 8b.
By b, sealing is performed respectively.

The pipe joint 7 for gas fire extinguishing equipment rotates the length adjusting pipe 71 to provide a space between the length adjusting pipe 71 and the eccentric pipes 72, 73 disposed on both sides thereof, that is, the eccentric pipe 72. And the eccentric pipe 73 is adjusted so that the entire length of the pipe joint 7 for gas fire extinguishing equipment is set to the distance between the T joint pipe 8 connected to the container valve 4 of the adjacent fire extinguishing agent storage container 1 and the length adjustment pipe The amount of displacement is adjusted by rotating the eccentric pipes 72 and 73 disposed on both sides of the pipe 71, and the displacement L2 at both ends of the pipe joint 7 for gas fire extinguishing equipment is transferred to the container valve 4 of the adjacent fire extinguishing agent storage container 1. The connection pipes 74 and 75 are screwed and used with the T-joint pipe 8 connected to the container valve 4 of the fire extinguishing agent storage container 1 in a state where the opening position of the connected T-joint pipe 8 is set to a difference in the vertical plane. .

As a result, since the dimensional accuracy of the fire extinguishing agent storage container 1 is not good, even if there is a difference in the opening position of the T-joint pipe 8 connected to the container valve 4 of the fire extinguishing agent storage container 1 in the vertical plane, the gas is not affected. A plurality of fire extinguisher storage containers 1 can be connected with high precision by appropriately adjusting the length adjusting pipe 71 of the fire extinguishing equipment pipe joint 7 and the eccentric pipes 72 and 73 provided on both sides thereof.

In this embodiment, in order to connect the plurality of fire extinguishing agent storage containers 1 to each other, a T-joint pipe 8 extending horizontally to the container valve 4 of the fire extinguishing agent storage container 1 is used. 1 and 2 (a), but using a T-joint pipe 8 ′ provided with an upwardly extending elbow on the container valve 4 of the fire extinguishing agent storage container 1. May be connected using the gas fire extinguishing equipment pipe joint 7 (see FIG. 2B).

FIGS. 3 and 4 show a second embodiment of the pipe joint for gas fire extinguishing equipment of the present invention. In the present embodiment, the gas fire extinguishing equipment pipe joint 7 is used as a conduit connecting the fire extinguisher storage container 1 and the collecting pipe 6, and FIG. FIG. 4 shows a connection method in the case where there is a difference in the opening position of the connecting pipe 61 of the pipe 6 in the horizontal plane, and FIG. 4 shows an opening position of the container valve 4 of the extinguishing agent storage container 1 and an opening position of the connecting pipe 61 of the collecting pipe 6. Shows the connection method when there is a difference in the vertical plane.

The pipe joint 7 for gas fire extinguishing equipment is provided on both ends of the length adjusting pipe 71 with connecting portions 71a and 71b each having a right-hand thread and a left-hand thread cut at both ends. The control tube 71 has right and left threaded connection portions 72a and 73a screwed to the connection portions 71a and 71b at one end, and the opening positions at both ends are eccentric (however, the opening end surfaces are parallel). The eccentric tubes 72, 73 forming pipes, and the connecting tubes 74, 75 provided at the other ends of the eccentric tubes 72, 73, the connecting tube 74 being connected to the connecting tube 61 of the collecting pipe 6,
5 is screwed into the container valve 4 of the fire extinguishing agent storage container 1 so as to connect the fire extinguishing agent storage container 1 and the collecting pipe 6.

In this case, on the outer peripheral surfaces of the length adjusting pipe 71, the eccentric pipes 72, 73 and the connecting pipes 74, 75, a rotary operating section 7 having a shape which can be easily operated by an appropriate tool such as a spanner.
1c, 72c, 73c, 74a, and 75a are formed. The sliding surfaces of the length adjusting tube 71 and the eccentric tubes 72 and 73 are provided by O-rings 72b and 73b, and the contact surfaces of the eccentric tube 72 and the connecting tube 61 are provided by an O-ring 61b.
The contact surface between the eccentric tube 73 and the container valve 4 is sealed by the O-ring 4a. Further, it is desirable that the end surface 72d of the eccentric tube 72 and the end surface 61a of the connection tube 61 are formed in a spherical shape so as to be able to absorb a slight deflection of the central axis of the eccentric tube 72 and the connection tube 61.

The pipe joint 7 for gas fire extinguishing equipment rotates the length adjusting pipe 71 so that the distance between the length adjusting pipe 71 and the eccentric pipes 72, 73 disposed on both sides thereof, that is, the eccentric pipe 72. And the distance L3, L5 between the eccentric pipe 73 and the eccentric pipe 73, the total length of the pipe joint 7 for gas fire extinguishing equipment is set to the distance between the container valve 4 of the fire extinguishing agent storage container 1 and the connecting pipe 61 of the collecting pipe 6, and the length is adjusted. The amount of displacement is adjusted by rotating the eccentric pipes 72 and 73 disposed on both sides of the pipe 71, and the pipe joint 7
The displacements L4 and L6 at both ends of the fire extinguisher storage container 1
The connecting pipe 74 is connected to the connecting pipe of the collecting pipe 6 in a state where the difference between the opening position of the connecting pipe 61 of the collecting pipe 6 and the horizontal plane (in the case shown in FIG. 3) or the vertical plane (in the case of FIG. 4) is set. At 61, the connecting pipe 75 is screwed to the container valve 4 of the fire extinguishing agent storage container 1, respectively.

Since the dimensional accuracy of the fire extinguisher storage container 1 is not good, the opening position of the container valve 4 of the fire extinguisher storage container 1 and the opening position of the connecting pipe 61 of the collecting pipe 6 are located in a horizontal plane or a vertical plane. If there is a difference, that is, even if there is a difference between the plurality of fire extinguishing agent storage containers 1 in the horizontal plane or the vertical plane at the opening position of the container valve 4, the length adjusting pipe for the gas fire extinguishing equipment pipe joint 7 71 and eccentric tubes 72 arranged on both sides thereof,
73, the plurality of fire extinguisher storage containers 1
Can be connected to the collecting pipe 6 with high accuracy.

In this embodiment, the case where the opening position of the container valve 4 of the fire extinguishing agent storage container 1 and the opening position of the connecting pipe 61 of the collecting pipe 6 have a difference in a horizontal plane or a vertical plane has been described as an example. Is the opening position of the container valve 4 of the fire extinguishing agent storage container 1 and the collecting pipe 6
Even if there is a difference between the opening position of the connecting pipe 61 in the horizontal plane and the vertical plane, the gas extinguishing equipment can be provided by adjusting the amount of rotation of the eccentric pipes 72, 73 disposed on both sides of the length adjusting pipe 71. By setting the amount of displacement at both ends of the pipe joint 7 to a predetermined value, a plurality of fire extinguishing agent storage containers 1 can be connected to the collecting pipe 6.

[0027]

According to the pipe joint for gas fire extinguishing equipment of the present invention, the entire length of the pipe joint and the amount of eccentricity of the opening positions at both ends can be arbitrarily adjusted within a predetermined range, and the unit has a very simple structure. Since it is made of a member, it is easy to improve the pressure resistance and flexibility when the capacity of the pipe joint, that is, the diameter of the pipe joint, is increased, to maintain accuracy and ease of processing, to reduce the size and to reduce the cost by standardization. It meets the requirements of large capacity and high pressure resistance required when a fluorine compound or nitrogen gas is used as a fire extinguishing agent for gas fire extinguishing equipment.

The pipe joint for gas fire extinguishing equipment of the present invention
It can be used for both connection between the fire extinguishing agent storage containers and connection between the fire extinguishing agent storage container and the collecting pipe, and the degree of freedom in designing the gas fire extinguishing equipment can be improved.

[Brief description of the drawings]

1 shows an example in which a pipe joint for gas fire extinguishing equipment of the present invention is used for connecting fire extinguishing agent storage containers, (a) is a plan view thereof, and (b) is a side view.

FIG. 2 is an explanatory view showing the piping method.

FIG. 3 is a plan view showing an example in which the pipe joint for gas fire extinguishing equipment of the present invention is used for connecting a fire extinguisher storage container and a collecting pipe.

FIG. 4 is a front view showing an example in which the pipe joint for gas fire extinguishing equipment of the present invention is used for connecting a fire extinguisher storage container and a collecting pipe.

FIG. 5 is a front view showing a conventional gas fire extinguishing system.

FIG. 6 is an explanatory view of a conduit used in a conventional gas fire extinguishing system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fire extinguisher storage container 4 container valve 5 conduit 6 collecting pipe 61 connecting pipe 7 pipe fitting for gas fire extinguishing equipment 71 length adjusting pipe 72 eccentric pipe 73 eccentric pipe 74 connecting pipe 75 connecting pipe 8 T fitting pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A62C 35/68 A62C 35/02 A62C 35/62 F16L 27/08

Claims (3)

(57) [Claims] 1. A length adjusting tube having a connection portion formed by cutting a right-hand thread and a left-hand thread at both ends, and a rotation operation portion formed on an outer peripheral surface, and a right-hand screw screwed into a connection portion of the length adjusting tube. Or an eccentric tube having a left-threaded connection portion at one end, forming a rotation operation portion on the outer peripheral surface, forming a conduit so that the opening positions at both ends are eccentric, and provided at the other end of the eccentric tube A pipe joint for gas fire extinguishing equipment, comprising a connection pipe having a rotation operation part formed on an outer peripheral surface. 2. A gas fire extinguishing equipment pipe joint for connecting fire extinguisher storage containers to each other.
The pipe joint for gas fire extinguishing equipment as described. 3. The pipe joint for gas fire extinguishing equipment according to claim 1, wherein the pipe joint for gas fire extinguishing equipment connects the fire extinguisher storage container and the collecting pipe.