JPH0446767Y2 - - Google Patents

Description

[Detailed description of the invention] a. Purpose of the invention (industrial application field) The extinguishing agent transfer pipe connection device for the pressure accumulation type automatic fire extinguishing system according to this invention is capable of automatically starting up and spouting extinguishing agent when a fire occurs. It is incorporated into an automatic fire extinguishing system for initial extinguishing of fires, and is used to easily and reliably connect the inlet-side extinguishing agent transfer pipe leading to the extinguishing agent container and the outlet-side extinguishing agent transfer pipe leading to the nozzle.

(Prior Art) For example, there is a higher risk of a fire occurring above a stove in a kitchen or where a heater is installed compared to other locations. For this reason, automatic fire extinguishing systems are often installed in places where there is a high risk of fire outbreaks, which automatically activates when a fire occurs and performs fire extinguishing activities by spouting extinguishing agent.

Some automatic fire extinguishing systems have a structure in which low-temperature molten solder is melted by the heat of the fire, and a blocking plate blocking a nozzle spout is blown away, thereby jetting a fire extinguishing agent from the nozzle.

When an automatic fire extinguishing system is activated, extinguishing agent is ejected from a nozzle fixed in advance towards the stove or heater to extinguish the fire. As a relatively small automatic fire extinguishing system, one having a structure as shown in FIG. 7 was known.

The automatic fire extinguishing system shown in FIG. 7 is configured by attaching a cap nut 2 to the upper opening of a fire extinguishing agent container 1 filled with extinguishing agent and pressurized gas which serves as a driving source for spouting out the extinguishing agent. A lid body 3 is attached, and the base end of the fire extinguishing agent transfer pipe 4 is connected to a fire extinguishing agent discharge port connected to a siphon pipe 6 which is provided on the lid body 3 and whose lower end is opened near the bottom of the fire extinguishing agent container 1. ing.

A nozzle 5 for spouting a fire extinguishant is attached to the tip of the fire extinguishant transfer pipe 4. This nozzle 5
The heat from the fire melts the low-temperature melting solder fixing the plug that blocked the spout, and the pressure sent from the extinguishing agent container 1 through the extinguishant transfer pipe blows off the plug and opens the spout. , is configured to eject extinguishing agent from this spout.

For this reason, if the nozzle 5 at the tip of the extinguishing agent transfer pipe 4 is installed in a place where fire is likely to occur, such as above the stove, it can be automatically activated in the event of a fire to extinguish the fire.

(Problems to be Solved by the Invention) However, in the pressure accumulation type automatic fire extinguishing system constructed and operated as described above, the following disadvantages have conventionally occurred.

That is, the nozzle 5 for spouting extinguishing agent is installed above the stove where fires are likely to occur, but the extinguishing agent container 1 for supplying the extinguishing agent to this nozzle 5 is installed at the same location as the nozzle 5. I installed it a little far away so that it wouldn't interfere with my kitchen work.
The extinguishing agent container 1 and the nozzle 5 must be connected by an extinguishing agent transfer pipe 4.

In this way, the length of the extinguishing agent transfer pipe 4 for connecting the extinguishing agent container 1 and the nozzle 5 is approximately 60 to 100 cm, depending on the conditions of the installation location, so the pressure accumulation type automatic fire extinguishing system is packed. In this case, the transfer tube 4 must be rolled up as shown in FIG. 7, and then the transfer tube 4 must be extended at the installation site.

The work of rolling or extending the extinguishant transfer pipe 4 in this way is troublesome and is not preferable for either the packaging work or the installation work.

Also, if the distance between the installation location of the fire extinguishant container 1 and the installation location of the nozzle 5 is significantly different, both members 1,
In this case, an automatic fire extinguishing system incorporating a transfer pipe 4 of an appropriate length must be assembled at the factory to avoid mistakes. Since the product must be supplied to the installation site at the same time, product management becomes extremely troublesome.

The connecting device for a fire extinguishing agent transfer pipe for an automatic fire extinguishing system according to the present invention solves all of the above-mentioned problems.

b. Structure of the invention (Means for solving the problems) The connecting device for the extinguishing agent transfer pipe for the pressure accumulation type automatic fire extinguishing system of the invention is a cylinder in which the large diameter part and the small diameter part are connected by a conical inclined surface. It is composed of a receiving fitting having a circular hole having a shape and a piston-shaped valve body fitted therein, and a cylindrical insertion fitting that can be freely inserted into the inside of the small diameter portion of the receiving fitting.

The inside of the large diameter part that constitutes the circular hole of the above-mentioned receiving fitting can be freely connected to the extinguishing agent discharge port of the extinguishing agent container, and the insert fitting can be connected to the end of the extinguishing agent transfer pipe on the outlet side leading to the extinguishing agent jetting nozzle. It is said that

The valve body fitted inside the circular hole of the receiving fitting is provided with a sliding part that can be freely fitted into the small diameter part of this circular hole, and
It is constructed by forming a passage for passage of extinguishing agent in the above-mentioned sliding part. A packing is attached to the outer peripheral surface of the valve body to open and close the passage for passage of the extinguishing agent by being attached to and detached from the inclined surface as the valve body slides inside the circular hole.

A compression spring is provided between the valve body and the lid body that closes the opening at one end of the receiving fitting, and the above-mentioned packing provides elasticity to the valve body in the direction of closing the open end of the passage for transferring the extinguishing agent. Granted.

A male screw is engraved on the outer periphery of the other end of the receiving fitting that is not covered by the lid, and the male screw is screwed onto the outer periphery of the insertion fitting that is inserted inside the receiving fitting. He is wearing a bag nut.

In addition, of the circular hole provided in this receiving fitting, at least one surface of the inner circumferential surface of the small diameter part into which the insertion fitting is inserted and the outer circumferential surface of the insertion fitting to be inserted into this small diameter part is provided with a hole around the entire circumference. Packing is attached to the locking groove formed so as to maintain airtightness between the outer circumferential surface of the insert fitting and the inner circumferential surface of the small diameter portion when the insert fitting is inserted into the small diameter portion.

The length of the insert is determined by inserting the insert into the small diameter part of the circular hole of the receiver, bringing the tip of the insert into contact with the valve body inside the receiver, and inserting the cap nut into the outer peripheral surface of the end of the receiver. When the cap nut is screwed together with the male screw of The opening end of the passage is designed to be open.

(Function) By the connecting device of the extinguishing agent transfer pipe for an automatic fire extinguishing system of the present invention configured as described above, the extinguishing agent transfer pipe on the inlet side leading to the extinguishing agent discharge port of the extinguishing agent container and the outlet side leading to the nozzle are connected. When connecting the extinguishing agent transfer pipe to the extinguishing agent transfer pipe while keeping the joint airtight, insert the insert into the inside of the holder, and carve the cap nut attached to the outer circumference of the holder into the outer circumferential surface of the end of the holder. Screw it into the male screw that was set up and tighten it further.

At this time, the airtightness between the outer circumferential surface of the insert fitting inserted inside the small diameter portion of the receiving fitting and the inner circumferential surface of the small diameter portion is maintained by the packing provided between both surfaces. Pressure gas introduced into the receiving fitting from the inlet-side extinguishing agent transfer pipe will not leak from between the receiving fitting and the insertion fitting.

Before the cap nut is tightened, the packing fitted on the outer peripheral surface of the valve body is pressed against the inclined surface by the elasticity of the compression spring, blocking communication between the large diameter part and the small diameter part of the circular hole of the receiving fitting. Therefore, the inlet-side extinguishing agent transfer pipe and the outlet-side extinguishing agent transfer pipe remain cut off, but by tightening the cap nut, the insertion fitting moves the valve body against the elasticity of the compression spring. Then, the through hole of the sliding part of the valve body opens into the large diameter part, and the inlet side fire extinguishant transfer pipe comes to communicate with the outlet side fire extinguishant transfer pipe through the passage inside the valve body. Since the passage within the valve body communicates with the outlet-side extinguishing agent transfer pipe, both the inlet side and outlet side extinguishing agent transfer pipes are thereby in communication via the passage.

Since the valve body moves slowly when the cap nut is tightened, the pressure from the inlet-side extinguishant transfer pipe rapidly advances to the outlet-side extinguishant transfer pipe, colliding with the blocking plate blocking the nozzle. Accidents such as the impact causing the blocking plate to peel off do not occur.

(Example) Next, the present invention will be explained in more detail by explaining the illustrated embodiment.

FIG. 1 is a side view showing a state in which a receiving fitting 7 and a fire extinguishing agent container 1 constituting a connecting device for a fire extinguishing agent transfer pipe for an automatic fire extinguishing system according to the present invention are connected via an inlet side fire extinguishing agent transfer pipe 8. , FIG. 2 is a plan view of the outlet-side extinguishing agent transfer pipe 9 with the nozzle 5 attached to its tip, and the receiving fitting 7 and the insertion fitting 10 that constitute the connection device, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. , FIG. 4 is a diagram similar to FIG. 3 showing a connected state.

Receiving metal fitting 7 and insertion metal fitting 1 constituting the connecting device
0, the receiving fitting 7 connected to the end of the inlet-side fire extinguishing agent transfer pipe 8 has a cylindrical circular hole 11 in which a large diameter part 11a and a small diameter part 11b are connected by a mortar-shaped inclined surface 11c. has. The end of the inlet-side fire extinguishing agent transfer pipe 8 is the outer circumferential surface of the receiving fitting 7, and the large diameter portion 11a
The inlet-side extinguishing agent transfer pipe 8 is connected to a connecting portion 12 provided at a position corresponding to the above, and communicates with the inside of the large diameter portion 11a.

With this structure, a valve body 13 is fitted inside the circular hole 11 of the receiving fitting 7 connected to the end of the inlet-side extinguishing agent transfer pipe 8. The valve body 13 has a bottomed cylindrical shape that can be fitted into the small diameter portion 11b of the circular hole 11, and has a sliding portion 1 having through holes 14, 14 for communicating the inside and outside.
A support part 16 having a larger diameter than the sliding part 15 is provided at the end of the slider 5, and a packing 17 that can freely come into contact with the inclined surface 11c is attached to the support part 16.

One end opening of the circular hole 11 of the receiving metal fitting 7 is closed by a lid 18, and a packing 19 is provided between the lid and the receiving metal fitting 7, so that the lid 18 and the receiving metal fitting 7 are closed.
maintains airtightness between Also, this lid body 18
A compression spring 20 is provided between the valve body 13 and the valve body 13 to impart elasticity to the valve body 13 in the direction of pressing the packing 17 against the inclined surface 11c.

A male screw 21 is provided on the outer peripheral surface of the other end of the receiving fitting 7 that is not covered by the lid 18. A cap nut 22 which can be freely screwed onto this male screw 21 constitutes a connecting device together with this receiving fitting 7, and a circular tubular insertion fitting 1 is inserted into the inside of the receiving fitting 7 at the time of connection.
By locking the inner peripheral edge to the outward flange shaped part 23 formed on the outer peripheral surface of the insert fitting 10,
It is rotatably attached to the

In addition, a locking groove 24 is formed around the entire circumference of the small diameter portion 11b of the circular hole 11 provided in the receiving fitting 7, into which the insertion fitting 10 is inserted. When the packing 25 is attached to the stopper groove 24 and the insert fitting 10 is inserted inside the small diameter portion 11b, airtightness is maintained between the outer circumferential surface of the insert fitting 10 and the inner circumferential surface of the small diameter portion 11b. ing.

The length of the insert fitting 10 is such that the insert fitting 10 is inserted inside the small diameter portion 11b of the circular hole 11 of the receiving fitting 7, and the tip of the insert fitting 10 is attached to the edge of the valve body 13 inside the receiving fitting 7. When brought into contact with each other, the cap nut 22 attached to the outer circumferential surface of the insertion fitting 10 connects to the male screw 2 formed on the outer circumferential surface of the end of the receiving fitting 7.
1 and can be screwed together, and then the above-mentioned cap nut 2
2 is tightened, the packing 17 of the valve body 13 pushed by the insertion fitting 10 is pressed against the receiving fitting 7.
It is set so as to be away from the inclined surface 11c of the inner circumferential surface.

The connecting device for the extinguishing agent transfer pipe for an automatic fire extinguishing system of the present invention is constructed as described above, and this connecting device connects the inlet-side extinguishing agent transfer pipe 8 that leads to the extinguishing agent outlet of the extinguishing agent container 1. When connecting the outlet-side fire extinguishing agent transfer pipe 9 leading to the nozzle 5 while maintaining airtightness at the connection part, insert the insertion fitting 10 into the receiving fitting 7.
A cap nut 22 attached to the outer periphery of the insertion fitting 10 is screwed into a male screw 21 carved on the outer peripheral surface of the end of the receiving fitting 7, and further tightened.

At this time, the outer peripheral surface of the insert fitting 10 inserted inside the small diameter part 11b of the receiving fitting 7 and the small diameter part 1
The airtightness between the small diameter portion 11b and the inner circumferential surface of the small diameter portion 11b is maintained by a packing 25 that is installed in a locking groove 24 on the inner circumferential surface of the small diameter portion 11b and whose inner circumferential edge is brought into elastic contact with the outer circumferential surface of the insertion fitting 10. Therefore, the pressure gas introduced into the receiving fitting 7 from the inlet-side extinguishing agent transfer pipe 8 will not leak from between the receiving fitting 7 and the insertion fitting 10.

The through holes 14 , 14 formed in the sliding portion 15 of the valve body 13 fitted into the receiving fitting 7 allow the packing 17 attached to the valve body 13 to be moved by the elasticity of the compression spring 20 before the cap nut 22 is tightened. Slanted surface 11 of handle bracket 7
If it is in elastic contact with the inlet side extinguishing agent transfer pipe 8, it will not lead to the inlet side extinguishant transfer pipe 8.
The outlet side extinguishing agent transfer pipe 9 remains blocked, but the valve body 1 is tightened by tightening the cap nut 22.
3 moves against the elasticity of the compression spring 20, and when the packing 17 separates from the inclined surface, the through holes 14, 14 move into the large diameter portion 11a and close to the bottomed cylindrical sliding portion 15. The inside of the pipe connects to the inlet side extinguishing agent transfer pipe. The inside of the sliding part 15 and the exit side extinguishing agent transfer pipe 9
Since the extinguishing agent transfer pipes 8 and 9 on the inlet side and the outlet side are originally in communication with each other through the passage, the extinguishing agent transfer pipes 8 and 9 on the inlet side and the outlet side are brought into communication with each other.

In the illustrated embodiment, packing 26 is also attached to the inside of the cap nut 22, and this cap nut 22
When tightening, this packing 26 is the bag nut 22.
Since it is configured so that it is compressed between the insert fitting 10 and the receiving fitting 7, after the cap nut 22 is tightened, airtightness between the insertion fitting 10 and the receiving fitting 7 is maintained between this packing 26 and the packing 26. It is held doubly by 25.

Next, FIGS. 5 and 6 show a second embodiment of the present invention.

In this embodiment, it is possible to easily and reliably know by visual inspection whether or not the communication between the inlet-side extinguishing agent transfer pipe 8 and the outlet-side extinguishing agent transfer pipe 9 is ensured when the cap nut 22 is tightened. It is structured in such a way that it can be done.

That is, in the case of this embodiment, the lid 3 that closes the opening at one end of the receiving metal fitting 7 is configured in a cylindrical shape, and the end 13a of the valve body 13 that passes through the center hole 27 of the lid 3 in an airtight manner. If the communication between the inlet-side extinguishing agent transfer pipe 8 and the outlet-side extinguishing agent transfer pipe 9 is cut off, the fifth
As shown in the figure, when the cap nut 22 is sufficiently tightened and the inlet-side extinguishant transfer pipe 8 and the outlet-side extinguishant transfer pipe 8 communicate with each other, although it is hidden in the receiving metal fitting 7,
As shown in FIG. 6, it is made to protrude from the end surface of the receiving metal fitting 7.

In the case of this embodiment, it is possible to easily know whether or not the inlet-side extinguishing agent transfer pipe 8 and the outlet-side extinguishing agent transfer pipe 9 are in communication with each other. It is possible to prevent the fire extinguishing system from becoming unusable in the event of a fire due to incomplete communication between the two transfer pipes due to carelessness.

The mounting position of the packing 17 between the outer circumferential surface of the valve body 13 and the inner surface of the circular hole 11 is determined by the large diameter support portion 1 formed on the outer circumferential surface of the valve body 13 as shown in the figure.
6, but may be formed over the entire circumference, for example, on the outer circumferential surface of the sliding portion 15 located on the right side of the through holes 14, 14 in the drawing, or on the inner circumferential surface of the right end of the small diameter portion 11b of the circular hole 11. The packing may be locked in the locking groove. In this case, the support portion 16 serves only to support the compression spring 20, so if there is a separate means for supporting the compression spring 20, the support portion 16 may be omitted.

c. Effects of the invention The connecting device of the extinguishing agent transfer pipe for the pressure accumulation type automatic fire extinguishing system of the present invention is constructed and operates as described above, so that the work of packing and installing the automatic fire extinguishing system is facilitated. In addition, by preparing multiple types of outlet-side extinguishing agent transfer pipes, it is possible to install them in various locations while keeping the same extinguishing agent container and inlet-side extinguishing agent transfer pipe, simplifying product management. It is also possible to aim for

In addition, to connect the outlet side extinguishing agent transfer pipe to the receiving metal fitting, screw the cap nut onto the receiving metal fitting and gradually open the through hole of the valve body to connect the inlet side extinguishing agent transfer pipe and the outlet side extinguishing agent transfer pipe. Since the nozzle is in communication with the pipe, there is no possibility that the pressure for pumping the extinguishing agent will suddenly enter the nozzle and collide with the sealing plate, causing it to peel off.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a state in which the receiving fitting and the extinguishing agent container constituting the connecting device of the extinguishing agent transfer pipe for an automatic fire extinguishing system of the present invention are connected via the inlet side extinguishing agent transfer pipe, and Fig. 2 is A plan view of the outlet-side fire extinguishing agent transfer pipe with a nozzle attached to its tip, and the receiving fitting and insertion fitting that make up the connection device, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 shows the connected state. Figure 3 is a similar view, and Figures 5 and 6 are Figure 3, which shows a second embodiment of the present invention.
4 is a sectional view corresponding to the right side of FIG. 4, and FIG. 7 is a partial longitudinal sectional side view showing a conventional automatic fire extinguishing system. 1... Extinguishing agent container, 2... Bag nut, 3... Lid, 4... Extinguishing agent transfer pipe, 5... Nozzle, 6...
Siphon pipe, 7... Receiving metal fitting, 8... Inlet side extinguishing agent transfer pipe, 9... Outlet side extinguishing agent transfer pipe, 10... Insert fitting, 11... Circular hole, 11a... Large diameter part,
11b...Small diameter part, 11c...Slanted surface, 12...
Connection part, 13... Valve body, 13a... End part, 14...
...Through hole, 15...Sliding part, 16...Support part, 17
... Packing, 18 ... Lid body, 19 ... Packing, 20 ... Compression spring, 21 ... Male screw, 22
... Cap nut, 23 ... Outward flange-shaped portion, 24
...Latching groove, 25, 26... Packing, 27...
...Central hole.

Claims (1)

[Scope of utility model registration request] A receiving fitting 7 has a circular hole 11 in which a large diameter portion 11a and a small diameter portion 11b are connected by a conical inclined surface 11c, and a piston-shaped valve body 13 is fitted in this circular hole 11, and this receiving fitting 7. This is a connecting device for a fire extinguishant transfer pipe, which is composed of a circular tubular insertion fitting 10 that can be inserted into a small diameter portion 11b of a metal fitting 7, and a large diameter portion 11a of the receiving metal fitting 7 is connected to a fire extinguishing agent discharge pipe of a fire extinguishing agent container. At the outlet, the insertion fittings 10 can be freely connected to the outlet-side extinguishing agent transfer pipe 9 leading to the extinguishing agent jetting nozzle 5, and the valve body 13 fitted into the circular hole 11 of the receiving fitting 7 is
It has a sliding part 15 that fits into the small diameter part 11b of this circular hole, and in this sliding part 15, a passage is formed that is closed on the large diameter part side and communicates only with the small diameter part 11b of the circular hole. A through hole 14 is formed at the back of this passageway to communicate the inside and outside of the sliding part 15, and an inclined surface 11c is formed on the side closer to the inlet side extinguishing agent transfer pipe 8 than the inclined surface 11c.
A packing 17 that can be attached and detached to connect and disconnect the large diameter portion 11a and the small diameter portion 11b is attached to the receiving metal fitting 7.
A compression spring 20 is provided between the lid body 18 that closes the opening at one end and the valve body 13 to push the valve body 13 and bring the packing 17 into elastic contact with the inclined surface 11c. A cap nut 22 is screwed into a male screw 21 carved on the outer peripheral surface of the other end of the receiving metal fitting 7.
is engaged with the outward flange shaped portion 23 formed on the outer periphery of the insertion fitting 10, and the small diameter portion 11b of the receiving fitting
A packing 25 is interposed between the inner circumferential surface of the insert fitting 10 and the outer circumferential surface of the insert fitting 10 inserted into this small diameter portion to maintain airtightness between both sides. When screwed into the male screw on the outer circumferential surface of the end of the bracket and tightened, the insert bracket 1
Packing 17 of the valve body 13 that is pushed to 0 and moves
is away from the inclined surface 11c, and the through hole 14 is separated from the circular hole 1.
A connection device for a fire extinguishing agent transfer pipe for a pressure accumulation type automatic fire extinguishing system having a length that opens into the large diameter portion 11a of No. 1.