JPS6020681Y2 - Underground fire hydrant adjustment device - Google Patents

Description

[Detailed explanation of the idea] This idea concerns the improvement of underground fire hydrants.

Underground fire hydrants are installed in storage boxes located under roads such as sidewalks and driveways.

This storage box surrounds the fire hydrant, and the upper opening is closed with a lid that can be opened and closed in line with the road surface. connected to the mains.

Also, when a road becomes damaged and needs to be repaired, concrete or asphalt is usually layered on top of the road, making the road surface higher than the old road surface.

When the road surface is raised in this way, it is relatively easy to remove the storage box attached to the old road surface and raise it to the new road surface, but it is difficult to raise the fire hydrant in the same way because it is connected to the underground water supply main. It will be a major undertaking as it will be construction work.

Therefore, in normal road construction, only the storage box is often raised and the fire hydrant is left at its original height.

For this reason, the position of the fire hydrant becomes deeper as the road surface becomes higher, and when an emergency such as a fire occurs, it is difficult to connect the fire hose to the fire hydrant, leading to a problem of increased damage.

The purpose of this invention is to improve the drawbacks of conventional fire hydrants as described above.

In other words, this idea is to install an adjustable tube that can freely adjust the height of the upward water outlet installed on one side of the fire hydrant valve box.When the road surface becomes high, the adjustable tube can be raised accordingly. This invention provides an adjustment device for an underground fire hydrant in which the connection part of the fire hose at the upper end is raised.

This invention will be explained in detail below based on the attached drawings.

In the figure, 1 is a valve box, and a connection port 2 at the bottom thereof is connected to a water main pipe (not shown).

Reference numeral 3 denotes an upward water outlet provided on one side of the valve box 1, and a support cylinder 4 is fixed to the upper end thereof.

Reference numeral 5 denotes an adjustment tube that is slidably fitted into the support tube 4. The female screw of a ring-shaped joint 6 is screwed into the male screw on the outside of the upper end of the adjustment tube, and a cylindrical insert is screwed into the female screw on the inside upper part of the joint 6. The male screw on the outer circumference of the lower end of the metal fitting 7 is screwed in to fix the metal fitting 7, and the mouthpiece of the fire hose is connected to this insertion metal fitting 7.

Reference numeral 8 denotes a lid which covers the upper end of the fitting 7 when the fire hydrant is not in use to prevent foreign matter from entering into the fitting 7.

Reference numeral 9 is a push ring fitted on the outside of the metal fitting 7 and is used when removing the hose.

A plurality of circumferential grooves 10 are formed in multiple stages on the outer periphery of the adjustment cylinder 5.

Reference numeral 11 denotes a fixed ring which is split in half, and this ring 11 engages with the circumferential groove 10 in a detachable manner.

Reference numeral 12 denotes a ring-shaped cap nut that is screwed into the male thread on the outside of the upper end of the support tube 4, and this cap nut 12 and the support tube 4 are connected together.
The adjusting cylinder 5 is fixed by a gasket 13 inside the upper end of the adjusting cylinder 5 by sandwiching the upper and lower sides of the fixing ring 11 engaged with the circumferential groove 10.

Reference numeral 14 denotes a valve port in the valve box 1, and 15 a valve body for opening and closing the valve port 14, which is fixed to the lower end of the valve rod 16.

17 is a packing box fixed on the valve box 1, and the valve stem 16 is
The male screw provided in is screwed into the screw hole provided in the packing box 17.

A cap 18 is fixed to the upper end of the valve stem 16.

The upper end of this cap 18 becomes an engaging part 19 such as a rectangular shape, and the valve stem 16 is rotated by engaging an engaging groove at the lower end of a rotating tool (not shown) with the retaining part 19. ing.

The underground fire hydrant with the adjustment device of this invention has the above-mentioned configuration, and the method of using it as a fire hydrant is to remove the lid 8 in the same way as before, connect the mouthpiece of the fire hose to the fitting 7, and then open the engaging part 19. A rotary tool is engaged with the valve rod 16 to rotate the valve body 15, and the valve port 14 is opened to start discharging water.

When installing a fire hydrant, place the adjustment cylinder 5 at the lowest position as shown in the figure, fit the fixing ring 11 into the circumferential groove 10 at the top, and sandwich this ring 11 between the bag 12 and the gasket 13. Make sure that the distance between the fitting 7 and the road surface is appropriate when it is fixed.

If the fire hydrant installed underground is located at a depth above the road surface due to road repair, remove the cap nut 12, remove the fixing ring 11 from the circumferential RIO, pull up the adjusting tube 5, and insert the With the depth of the metal fitting 7 from the road surface corrected to an appropriate value, the fixing ring 11 is fitted into the matching circumferential groove 10, and the fixing ring 11 is sandwiched between a cap nut 12 and a packing 13.

As mentioned above, when the road surface becomes higher due to road surface repairs, etc., the adjusting device of this invention can adjust the height of the fitting 7, which serves as the connection part of the hose, by raising the adjusting cylinder accordingly. This has the effect of allowing the connection part of the hose to be adjusted to an appropriate height at the time of repair without the need for laborious work such as changing the installation height of the fire hydrant itself.

[Brief explanation of drawings]

The drawing is a longitudinal sectional side view of a main part showing an example of a fire hydrant equipped with the adjusting device of this invention. 1... Valve box, 3... Water outlet, 4... Support tube, 5... Adjustment tube, 7... Fitting, 1o... Concave circumferential groove, 11...Fixing ring, 1
2. Song: Fukuro Natsuto, 13. Song: Patsukin.

Claims (1)

[Scope of utility model registration request] An upward water outlet is provided on one side of the valve box of an underground fire hydrant, and an adjustment tube with a fire hose connection at the upper end is slidably fitted into a support tube fixed to the top of this water outlet. An adjustment device for an underground fire hydrant, wherein a fixing means for fixing the adjustable tube at an arbitrary height is provided between the adjustable tube and the support tube, and a lid that can be opened and closed is provided at the connection part at the upper end of the adjustable tube.