JP2001248190A - Hydrant mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrant mounting structure capable of readily coping with different embedded depths of a water pipe and different installation depths of a valve casing and also coping with changes in height of the surface of the ground. SOLUTION: Either one of an upper connecting pipe extending from a hydrant body part into the ground and a lower connecting pipe extending upwards from a hydrant valve casing is provided with a socket 15 and the other of the pipes is provided with a spigot 16. A lower valve rod 42 formed to be capable of adjusting the amount by which the spigot 16 is inserted into the socket 15 and adapted to open and close a valve element in the hydrant valve casing and an upper valve rod 43 provided in the hydrant body part are connected with each other by an axially movable connecting member 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a fire hydrant, and more particularly to a mounting structure for connecting a main body of a ground-type fire hydrant to a valve box.

[0002]

2. Description of the Related Art A fire hydrant installed on the ground is usually located above a fire hydrant valve box branched from a water pipe buried underground. The connection is made by flange connection using a connection pipe having a length corresponding to the installation depth of the valve box.

[0003]

Therefore, when the burial depth of the water pipe is different and the installation depth of the valve box is different, connection pipes corresponding to the installation depth of the valve box must be prepared. Further, when the height of the ground surface is changed due to repair of a road surface or the like, a connection pipe having a predetermined length must be replaced each time.

Therefore, the present invention can easily cope with a difference in the burial depth of a water pipe and the installation depth of a valve box, and can also cope with a change in the height of the ground surface. It is intended to provide structure.

[0005]

To achieve the above object, a fire hydrant mounting structure according to the present invention is provided for connecting a fire hydrant main body installed on the ground to a fire hydrant valve box installed underground. In the mounting structure, an upper connection pipe extending from the fire hydrant body toward the valve box, and a lower connection pipe extending from the fire hydrant valve box toward the fire hydrant body at a receiving port,
A spigot is provided on the other side, and the amount of insertion of the spigot into the receiving port is formed so as to be adjustable, and a lower valve stem for opening and closing the valve body in the fire hydrant valve box and an upper valve stem provided on the fire hydrant main body, It is characterized by being connected by a connecting member movable in the axial direction.

[0006]

1 to 3 show an embodiment of a fire hydrant mounting structure according to the present invention. FIG. 1 is a longitudinal sectional view of a main part, FIG. 2 is a front view showing an overall shape, and FIG. FIG. 3 is a cross-sectional view of a main part. First of all, as shown in FIG.
A fire hydrant main body 11 installed on the ground 10, a valve box 14 connected to a branch pipe 13 branched from the water pipe 12,
It is formed of a receiving member 15 connected to the upper part of the valve box 14 by flange connection and a spout member 16 connected to the lower part of the fire hydrant main body 11 by flange connection.

The fire hydrant main body 11 and the valve box 14 have the same structure as a conventional ground fire hydrant, and the valve stem operating portion 11b protruding from the cap 11a of the fire hydrant main body 11 is operated by an opener. By turning the valve stem in the opening direction, the valve body in the valve box 14 moves in the opening direction and opens, and the fire extinguishing water spouts from the water outlet 11c provided on the side of the hydrant main body 11. Is formed.

As shown in FIG. 1, the receiving member 15 is provided with a receiving port 22 having a diameter into which the spout member 16 can be inserted, above a flange 21 connected to the valve box 14. ,
A rubber ring mounting groove 24 for mounting a rubber ring 23 for sealing is provided on the inner periphery of the receiving port 22, and the spigot member 1 is provided on the outer periphery.
A retaining member mounting portion 27 is provided for mounting, via a bolt 26, a retaining member 25 for holding the member 6 at a predetermined position.

The one spout member 16 is connected to the fire hydrant main body 11.
A straight pipe portion 31 having an outer diameter smaller than the inner diameter of the receiving port 22 is provided below the flange connected to the pipe 22. The length of the straight pipe portion 31 is such that the lower portion of the straight pipe portion 31 It is set so as to correspond to the standard installation depth of the valve box 14 when a predetermined amount is inserted into the receptacle 22.

The valve stem for opening and closing the valve body in the valve box 14 includes a lower valve stem 42 provided with a female screw 41 screwed to the valve body and the valve stem protruding from the top of the fire hydrant main body 11. An upper valve stem 43 connected to the rod operating part 11b,
And a connecting member 44 for connecting the connecting members 43. Each of the valve stems 42 and 43 has a square section in which an insertion portion into the connecting member 44 is formed. The connecting member 44 is provided with a square through hole 44a on the inner periphery through which the valve stems 42 and 43 can be inserted. ing. In the present embodiment, the lower end of the connecting member 44 is fitted to the lower valve stem 42 so as to rotate integrally with the lower end of the connecting member 44. And is inserted so as to be rotatable and integrally rotatable.

As shown in FIG. 3, the retaining member 25 is a member for fixing a pair of half-shaped members 51a and 51b to predetermined positions of the straight pipe portion 31 by tightening them with bolts 52. Unevenness 53 to prevent slip on the inner peripheral surface of 51b
The bolt mounting portion 54 corresponding to the retaining member mounting portion 27 of the receiving member 15 is provided on the outside.

With this configuration, the fire hydrant main body 11 can be attached to the valve box 14 installed underground by using the receiving member 1 having the rubber ring 23 mounted at a predetermined position in the receiving port 22.
5 is attached to the valve box 14, and the connecting member 44 is attached to the lower valve stem 42, and the upper valve stem 43 is inserted into the connecting member 44 and the straight pipe part 31 is inserted into the socket 22. The retaining member 25 is attached so as to embrace the straight pipe portion 31 at the upper end opening position of the 22 and is fixedly fastened with a bolt 52,
Furthermore, by fastening the retaining member 25 to the receiving member 15 with the bolt 26, the fire hydrant main body 11 can be installed at a predetermined position.

At this time, even if the installation depth of the valve box 14 is different from the normal case, by adjusting the insertion amount of the straight pipe portion 31 into the receiving port 22, the fire hydrant main body 11 and the valve box 14 can be connected. Can be set to a size corresponding to the installation depth of the valve box 14, and the connection between the upper and lower valve rods 42, 43 can be performed without any problem.

As shown in FIG. 1, when coupling the receiving member 15 and the retaining member 25, a bolt 26 is fixed to the retaining member mounting portion 27 using a nut 28a. On the other hand, the bolt mounting portion 54 is
By interposing the nuts 8b and 28c, the position of the nuts 28b and 28c is adjusted, so that the socket member 15 and the spigot member 16 can be fixed at predetermined positions. In this case, by appropriately selecting the length of the bolt 26, the retaining member 25 can be fixed to an appropriate position on the outer periphery of the straight pipe portion 31 by welding or the like in advance. Instead of providing the intermediate nuts 28a and 28b, the bolt 26 and the nut 28c may be tightened by the bolt 26 and the nut 28c so that the opposing surfaces are in close contact and fixed.

Further, when the height of the ground surface changes due to repair of the road surface, etc., that is, when the fire hydrant main body 11 and the valve box 14
When the distance from the nut changes, remove the retaining member 25 or adjust the positions of the nuts 28b and 28c.
This can be dealt with by re-adjusting the insertion amount of the straight pipe portion 31 into the receiving port 22. In addition, valve box 1
In the case where 4 is installed at an extremely shallow position, it can be dealt with by cutting an appropriate amount of the straight pipe portion 31 and the upper valve stem 43 of the spout member 16.

As described above, like the conventional fire hydrant mounting structure, the lower flange of the fire hydrant main body 11 and the upper flange of the valve box 14 are respectively flange-coupled in accordance with the installation depth of the valve box 14. Since it is not necessary to prepare short pipes one by one, the workability when installing a fire hydrant can be greatly improved, and the costs required for manufacturing, stocking, distributing, and maintaining the components are greatly reduced. can do.

In the above embodiment, the spigot member 16 is used as the upper connecting pipe, and the receiving member 15 is used as the lower connecting pipe. However, the upper connecting pipe is used as the receiving member, and the lower connecting pipe is used as the spigot member. It is also possible to provide an auxiliary joint between the upper and lower connecting pipes. Further, the connection structure of the valve stem is not limited to a square cross section, and various structures and shapes can be adopted.

[0018]

As described above, according to the fire hydrant mounting structure of the present invention, the distance between the fire hydrant main body and the valve box can be adjusted, so that even if the installation depth of the valve box is different, it is easy. Can be handled. In addition, it is possible to cope with a change in the height of the ground surface after the installation of the fire hydrant.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing one embodiment of a fire hydrant mounting structure of the present invention.

FIG. 2 is a front view showing the overall shape of a fire hydrant.

FIG. 3 is a cross-sectional view of a main part.

[Explanation of symbols]

10: ground, 11: fire hydrant body, 12: water pipe, 13
... branch pipe, 14 ... valve box, 15 ... receiving member, 16 ... spout member, 21 ... flange, 22 ... receiving port, 23 ... rubber ring, 24
... Rubber ring mounting groove, 25 ... Retaining member, 26 ... Bolt, 2
7 ... retaining member mounting part, 31 ... straight pipe part, 41 ... female screw,
42 lower valve stem, 43 upper valve stem, 44 connecting member

Claims (1)

[Claims] 1. A mounting structure for connecting a fire hydrant main body installed on the ground and a fire hydrant valve box installed underground, comprising an upper connecting pipe extending from the fire hydrant main body to a valve box direction. A receiving port on one of the lower connecting pipe extending from the hydrant valve box toward the hydrant main body, and a spout on the other,
Along with the insertion amount of the spigot inserted into the socket is made adjustable,
A mounting structure for a fire hydrant, wherein a lower valve stem for opening and closing a valve body in a fire hydrant valve box and an upper valve stem provided on a fire hydrant main body are connected by a connecting member movable in an axial direction.