JPS5912296Y2 - Fluid ejection plug inspection device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a fluid ejection plug.

For example, a fluid spout hydrant such as a fire hydrant is connected to a high-pressure fluid supply path via a normally open main valve, and is connected to each free end of a plurality of branch paths on which the fluid pressure of the high-pressure fluid always acts. It is provided.

It is necessary to check whether such a fluid jet tap is operating normally in case of an emergency such as a fire, but when the fluid jet tap is opened during inspection work, the fluid may not be jetted out. Since it is ejected from the spout of the stopper, it is necessary to close the main valve before performing inspection work.

However, when performing inspection work with the main valve closed, there is a problem that in the event of an emergency such as a fire, not only the fluid jet valve being inspected but also other fluid jet valves cannot be used. be.

In order to solve this problem, a certain prior art technique attaches a blind cover to the spout, thereby preventing the fluid from spewing out and performing inspection work without closing the main valve.

However, in such prior art, after the inspection work is completed, high-pressure fluid remains between the valve of the fluid jet tap and the blind lid, making it difficult to remove the blind lid.
Moreover, the work of removing the blind cover becomes dangerous.

An object of the present invention is to provide a fluid ejection plug inspection device that prevents fluid ejection without closing the main valve and enables safe and quick work.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of an embodiment of the present invention.

High pressure fluid from a high pressure fluid supply source 1 is provided to a supply path 2 .

The high-pressure fluid supply source 1 is, for example, a pump, and pumps fluid such as seawater sucked in through the suction valve 40 to the supply path 2 .

A cutoff valve 3 is interposed between the high pressure fluid supply source 1 and the supply path 2 to cut off the supply of high pressure fluid.

The supply path 2 includes a plurality of branch paths 4a via a main valve 30.
, 4b are connected.

The branch paths 4a and 4b are further branched to form a plurality of branch paths 5a to 5C; 5d to 5f, respectively.

A fluid ejection plug 6 is provided at each free end of the branch paths 5a to 5f.

The shutoff valve 3 and the main valve 30 are always open, and the fluid pressure of the high-pressure fluid from the supply path 2 always acts on the branch paths 4 a and 4 b and the branch paths 5 a to 5 f.

The fluid jet hydrant 6 is, for example, a fire hydrant, and in an emergency such as a fire, the fluid jet hydrant 6 is opened and
The fluid such as the seawater is ejected.

The main valve 30 and branch paths 4a and 4b constructed in this way
, 5a to 5f and a plurality of fluid ejection plugs 6 are provided in association with the supply path 2.

FIG. 2 is a partially cutaway sectional view of the fluid jet plug 6 provided at the free end of the branch passage 5a shown in the first diagram.

The fluid jet plug 6 includes a jet valve 7 connected to the free end of the branch passage 5a, a cylinder 8 connected to the fluid jet side of the jet valve 7, and a bag provided at the free end of the cylinder 8. and a nut 9.

The free end of the cylinder 8 is formed with a flange 10 that projects outward from the axis of the cylinder 8, and is provided with a fluid spout 11.

The flange 10 of the cylinder 8 is housed within the cap nut 9 to allow rotation of the cylinder 8 around the axis of the cap nut 9 .

The cap nut 9 is provided with a handle 12 that projects around the axis of rotation.

The cap nut 9 is also provided with an internal thread 13.

In the fluid spout plug 6 constructed in this manner, a hose 14 for discharging water for extinguishing a fire in the event of a fire etc. is connected to a cap nut 9 by attaching an external thread 15 formed on the hose 14. The connection is made by screwing into the internal thread 13 of.

FIG. 3 is a sectional view showing a state in which an inspection device 20 according to an embodiment of the present invention is attached to the fluid ejection plug 6. As shown in FIG.

The inspection device 20 includes a bottomed cylindrical blind lid 21, a discharge pipe 23 fixed to the blind lid 21, and an on-off valve 22 interposed in the middle of the discharge pipe 23.

The cylindrical portion 24 of the blind lid 21 has an external thread 27 that corresponds to the internal thread 13 of the cap nut 9.

In the round cylindrical part 24, on the bottom part 28 side of the blind lid 21,
A handle 25 similar to the handle 12 of the cap nut 9 is provided.

The discharge pipe 23 communicates with the fluid spout 11 and is fixed to the bottom 28 of the blind lid 21 .

The operation of inspecting the fluid ejection plug 6 using the inspection device 20 configured in this manner will be described.

Referring again to FIGS. 1 and 3, during inspection work, the shutoff valve 3 and the main valve 30 remain open.

To attach the inspection device 20 to the fluid ejection plug 6, the outer thread 27 of the blind lid 21 of the inspection device 20 is screwed into the inner thread 13 of the cap nut 9 of the fluid ejection plug 6.

At this time, a packing 30 made of an elastic material such as rubber is interposed between the end surface of the cylindrical portion 24 of the blind lid 21 and the flange portion 10 of the cylinder 8 of the fluid ejection plug 6.

Next, with the on-off valve 22 of the inspection device 20 closed, the jetting valve 7 of the fluid jetting plug 6 is repeatedly opened and closed.

As a result, the opening/closing operation state of the jet valve 7, the presence or absence of water leakage from the jet valve 7, the connection state of the cap nut 9, etc. are inspected and confirmed.

After repeating the operation of fully opening and fully shutting down the jet valve 7 in this way, high-pressure fluid remains between the jet valve 7 and the blind lid 21, and the blind lid 21 retains the high-pressure fluid. The following effects A and B occur depending on the fluid pressure.

(A) The cylindrical portion 24 of the blind lid 21 is pressed against the cap nut 9 from inside.

(B) The bottom part 28 of the blind lid 21 is the flange part 10 of the fluid ejection plug 6.
is pushed in the direction away from the

In the present invention, after operating the ejection valve 7 as described above, the on-off valve 22 of the inspection device 20 can be opened and the remaining high-pressure fluid can be discharged from the discharge pipe 23.

Therefore, as described in connection with the prior art, the above actions (A) and (B) prevent the blind cover 21 from becoming difficult to remove or from becoming dangerous.

FIG. 4 is a partially cutaway sectional view of another embodiment of the present invention.

In FIG. 4, parts corresponding to those in FIG. 3 are given the same reference numerals.

What should be noted in this embodiment is that the fluid ejection plug 31 and the inspection device 32 are connected by a plug-in type connection structure instead of the screw type connection structure shown in the third figure.

The cylindrical portion 8 of the fluid ejection plug 31 has a cylindrical portion 8. Surrounding
The cylindrical body 34 having the flange 33 at the end on the side of the spout valve 7 is the cylindrical part 8.
is slidably inserted in the axial direction.

The inspection device 32 includes a bottomed cylindrical blind lid 35 like the inspection device 20, and the cylindrical portion 36 of the blind lid 35 has a locking member 38 biased radially inward by a spring 37.
Equipped with.

The inspection device 32 has a fitting groove 3 formed by the end of the cylindrical body 34 of the fluid ejection plug 31 and the flange 30 of the cylindrical part 8.
9, the locking member 38 is fitted into the fluid ejection plug. 31 is established.

To remove the inspection device 32 from the fluid jet stopper 31, press the flange 33 of the cylindrical body 34 in a direction approaching the blind lid 35 (downward in FIG. 4).

As a result, the locking member 38 is released from engagement with the fitting groove 39 against the spring force of the spring 37, and the blind lid 35 is released from the engagement with the fitting groove 39.
It becomes possible to pull it out from 4.

In this way, the fluid ejection plug 31 and the inspection device 32 can be attached and detached in one operation.

As another embodiment of the present invention, the high pressure fluid supply source 1 may be an elevated water tank, a pressure water tank, etc.

As described above, according to the present invention, the high-pressure fluid remaining between the jet valve provided in the fluid jet plug and the blind lid,
Since the fluid is discharged from the discharge pipe by the on-off valve attached to the blind lid, the inspection device can be easily removed from the fluid jet stopper after inspection work is completed, and the work can be performed safely.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 is a simplified partially cutaway sectional view of a fluid jet plug 6 provided at the free end of the branch path 5a shown in FIG. 1, and FIG. FIG. 3 is a sectional view showing a state in which an inspection device 20 according to an embodiment of the present invention is attached to the fluid ejection plug 6, and FIG. 4 is a partially cutaway sectional view of another embodiment of the present invention. 2... Supply path, 4a-4b, 5a-5f...
... Branch path, 6, 31 ... Fluid ejection plug, 9
, 35... Blind lid, 11... Outlet, 2
0.32... Inspection device, 22... Open/close valve, 23... Discharge pipe, 30... Main valve.

Claims (1)

[Claims for Utility Model Registration] A fluid connected to a high-pressure fluid supply path via a normally open main valve, and provided at each free end of a plurality of branch paths on which the fluid pressure of the high-pressure fluid always acts. It is characterized by comprising: a blind lid that is detachably attached to the fluid spout of the spouting plug; a discharge pipe that is fixed to the blind lid and communicates with the fluid spout; and an on-off valve that is interposed in the middle of the discharge pipe. Fluid ejection plug inspection device.