JPH0144609Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an underground fire hydrant installed inside a manhole or a pit.

[Prior art]

For most underground fire hydrants installed inside manholes or pits, the valves are opened and closed from the ground using a valve opener. It is difficult to confirm the position of the valve opening/closing cap to be fitted, and valuable time is wasted in the event of an emergency such as a fire, as the tip of the cap opener must be used to locate the inside of the manhole or pit. was. In particular, if the underground fire hydrant has been installed at a deeper location due to road elevation, etc., the water outlet can be moved closer to the ground level by connecting additional pipe material to the water outlet pipe, but the valve The position of the valve opening/closing cap, which performs opening/closing operations, is often used as it was before.
It was even more difficult to confirm the position of the valve opening/closing cap.

[Purpose of invention]

The present invention was developed in view of the above points, and aims to provide an underground fire hydrant in which the tip of the hydrant can be easily fitted into the valve opening/closing cap even at night or when water is accumulated in a manhole or pit. purpose.

[Structure of the idea]

In order to achieve the above object, the present invention provides an underground fire hydrant that uses a valve opener to open and close the valve.
The fire hydrant is characterized in that a guide pipe that guides the tip of the opener to the valve opening/closing cap into which the tip of the opener fits is installed upright on the underground fire hydrant.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 and 2, underground fire hydrant 1
The upper opening 3 of the valve box 2 is liquid-tightly closed off by a cover body 5 with an O-ring 4 sandwiched therebetween, and the cover body 5 is penetrated liquid-tightly by O-rings 6, 6 which are encircled. A disc-shaped valve body 8 is attached to the lower end of the valve stem 7 whose lower part is inserted into the valve box 2, and the tip of a cap opener is fitted to the upper end of the valve stem 7 that has passed through the lid body 5. A valve opening/closing cap 9 having a mating prismatic portion 9a on its upper portion is fixedly provided.

Further, an inflow pipe part 11 is integrally formed at the bottom of the valve box 2, and has a flange 10 formed at the end to connect to a water distribution pipe (not shown) and install this underground fire hydrant 1. A valve seat 13 is formed at the opening periphery of a bottom opening 12 in the valve box 2 where the pipe section 11 opens, and a water discharge passage pipe section 14 that rises outward in an elbow shape is formed on the side of the valve box 2. It is integrally formed in communication with the inside of the valve box 2.

In addition, the inflow pipe section 11 and the water discharge passage pipe section 1
The valve body 2, which is integrally formed with the valve body 8, has its inner and outer surfaces completely rust-proofed with a coating film 15 made of powder coating, and the valve body 8 is entirely covered with a comb lining 16.

Further, a supplementary pipe 17 is connected to the distal end of the water discharge passage pipe section 14 in a fluid-tight manner by sandwiching an O-ring 18, and a water discharge port 19 is connected to the distal end of the supplementary pipe 17.
The connecting pipe 21 that is attached via the mounting bracket 20 is O.
A ring 22 is clamped to connect the water-tight water outlet, and the most distal water outlet 19 is covered with a water outlet cap 23 to protect it from dust and damage.

Incidentally, when the underground fire hydrant 1 is installed at a deep location, the extension pipe 17 is added so that the most advanced water outlet 19 is within reach from the ground.

A rubber liner 24 is attached to the inner peripheral surface of the lower end of the upper cylindrical portion 5a of the lid body 5, through which the valve stem 7 with the cap 9 fixedly attached to the upper end is passed through in a liquid-tight manner, and the tip of the cap opener is guided. and the tip thereof is the prismatic portion 9 of the cap 9.
Guide pipe 25 for easily fitting into a
However, the lower end to which the rubber liner 24 is attached is press-fitted onto the outer periphery of the cylindrical portion 5a by utilizing the elasticity of the rubber liner 24, and the tip thereof is erected so that it is close to the ground and within easy reach. There is a removable dustproof cap 26 at the tip opening of the guide pipe 25.
It is blocked.

Further, the guide pipe 25 erected on the upper part of the lid body 5 is opened and closed by a hinge 27a, and is fastened at two upper and lower places by a gourd-shaped fastening band 27 whose both ends are pulled by bolts 27b to prevent its tilting. It is prevented.

In addition, 28 is a chain for preventing powder loss of the water outlet cap 23, and 29 is a female threaded piece that moves the valve stem 7 in the vertical direction as the valve stem 7 rotates.

Next, the operation of this embodiment configured as described above will be explained.

When discharging water for extinguishing fires, etc., remove the water outlet cap 23, connect the end fitting of the fire hose to the water outlet 19, remove the dustproof cap 26 of the guide pipe 25, and insert the opener into the guide pipe 25. When the tip is inserted, the tip of the cap opener is guided by the inner peripheral surface of the guide pipe 25 and
It can reach the position of the square column part 9a on the upper part of the cap 9 at the bottom of the cap 5, and can be easily fitted into the square column part 9a.

When the valve stem 7 is rotated in the valve opening direction by the opener whose tip is fitted into the prismatic portion 9a of the cap 9, the valve stem 7 is screwed out from the female threaded piece 29 and moves upward. The valve body 8 attached to the lower end of the valve stem 7 is separated from the valve seat 13, and the bottom opening 12 and the inside of the valve box 2 communicate with each other to open the valve, and high pressure water from the water pipe is discharged from the water discharge passage pipe section 14, Additional pipe 17, connecting pipe 21
The water is then sent to a fire extinguishing hose connected to the water outlet 19.

Also, when water is finished discharging, by inserting the tip of the valve opener into the guide pipe 25 in the same way,
The tip of the cap opener can be fitted into the prismatic portion 9a of the cap 9, making it easy to close the valve.

Furthermore, the guide pipe 25 has its lower end fixed to the extension pipe 17 at the tip of the water discharge passage pipe section 14, and is prevented from tipping by a fastening band 27, so that it will not tip even if the valve opener is operated roughly. There is no.

Further, FIG. 3 shows another example of the fastening band 27 used in this embodiment, in which both ends are twisted 90 degrees to form fixing parts 30a, 30a, and bolts are attached to the tips of the fixing parts 30a, respectively. Holes 30b, 30
The guide pipe 25 is held inside the U-shaped fastening band 30 which is connected to the fixing part 30a at both ends.
is arranged on the lower surface of the flange 31 formed at the tip of the water discharge passage or the supplementary pipe 17, and the flange 3
A connecting bolt 33 connecting the lower flange 32 of the connecting pipe 21 connected to the connecting tube 1 and the flange 31 is inserted into the bolt hole 30b drilled in the fixing part 30, and bolted together with the flanges 31 and 32, The fastening band 30 holds the guide pipe 25 at a predetermined position without slipping down, and prevents the guide pipe 25 from tilting.

In the above embodiment, the fastening band that prevents the guide pipe from tipping is fixed to the water discharge passage whose lower end is fixed to the valve box, but it is not fixed to the water discharge passage whose lower end is fixed to the lid of the valve box. The same effect can be obtained even if

Further, although the present invention relates to an underground fire hydrant equipped with a guide pipe, it can also be applied to a general valve device installed in a conduit in a valve chamber such as a manhole or a pit.

[Effect of idea]

As explained above, the present invention uses a cap opener to
In underground fire hydrants where the valve is opened and closed, a guide pipe is installed upright on the underground fire hydrant to guide the tip of the opener to the valve opening/closing cap into which the tip of the opener fits, and when discharging water, the tip of the opener is guided by the guide pipe. When inserted into a pipe, it is automatically guided to the valve opening/closing cap, and the tip of the opener can be easily fitted into the valve opening/closing cap, allowing for quick valve opening in the event of an emergency such as a fire. I can do it. The valve can be easily opened and closed, especially at night or when water accumulates in a manhole or pit in which an underground fire hydrant is installed.

Further, since the base end of the guide pipe is fixed to the water discharge passage fixed to the valve box with a fastening band, it is possible to reliably prevent the guide pipe from tipping.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of an underground fire hydrant according to the present invention; Figure 1 is a sectional front view;
FIG. 2 is a side view, and FIG. 3 is a front view of the main part showing the case where it is fixed with a U-shaped fastening band. 1 is an underground fire hydrant, 2 is a valve box, 5 is a lid body, 7 is a valve stem, 8 is a valve body, 9 is a cap, 9a is a prism part, 1
3 is a valve seat, 14 is a water discharge passage pipe section, 15 is a powder coating film, 16 is a rubber lining, 17 is a supplementary pipe, 19 is a water discharge port, 23 is a water discharge port cap,
24 is a rubber liner, 25 is a guide pipe, 26 is a dustproof cap, 27 is a gourd-shaped fastening band, and 30 is a U-shaped fastening band.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In an underground fire hydrant in which the valve is opened and closed by a valve opener, a guide pipe that guides the tip of the valve opener to a valve opening/closing cap into which the tip of the opener fits is attached to the underground fire hydrant. An underground fire hydrant characterized by being installed vertically. 2. The guide pipe has a water outlet at its tip,
The underground fire hydrant according to claim 1, wherein the base end is fixed with a fastening band to a water discharge passage fixed to a lid body or a valve box.