JPH03199785A - Electric water hydrant - Google Patents

Abstract

PURPOSE:To shorten time required for the operational work of a hydrant and to simplify the above operation and to save labor for that by providing a drain device for delivering water in a hydrant body, a bar-shaped valve stem having an attached valve body which seats on a valve seat to close a water leading port, and an electric motor rotatably connected through a connecting device to a driving sleeve. CONSTITUTION:An electric motor is rotated in a one-direction by remote controlling to interlock a driving sleeve through an output column 22 with the threadedly engaging part 18a of a valve stem 18 for moving the stem 18 toward one end of a hydrant body 10, and a valve body moves according to the movement of the stem 18 to make the valve body 19 seat on a valve seat 19 for turning a water leading part 11 into a closed state. When the electric motor 21 is reversely rotated, the stem 18 moves toward the other end of the hydrant body 10, and the valve body 19 moving according to the above movement of the stem 18 therefore separates from the valve seat 13 to make the water leading part 11 turn into a opened state. On the other hand, when the valve body 19 seats on the valve seat 13 to cut off a water passage from a water supply source to the water leading part 11, the water pressure of flowing water in the hydrant body 10 decrease to make the water pressure acting onto a check valve of a drain device 14 lower than a set pressure, and the check valve therefore opens to discharge residual water in the hydrant body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric water hydrant, and more particularly to a water hydrant that is electrically operated and can be remotely controlled.

This type of water hydrant is installed at ski resorts, for example, and is effectively used when connected to a water supply pipe and releasing water by opening a valve during snowmaking operations.

(Prior art) Conventionally, this type of water hydrant is as shown in Fig. 5.
A water introduction part αυ having a valve seat d at one end of the idrant main body Q□′ and a drain device α4 for releasing residual water are provided, and a water outlet αi is provided at the other end, and the valve seat α
3, the valve stem with the valve body α wound that can be seated is coaxially inserted into the hydrant body aQ, and the valve stem (T) is inserted coaxially into the hydrant body aQ.
is a screw body (
By turning the handle attached to the other end of the valve stem (T) which is led out from 1), the valve body α4 is moved in the axial direction within the hydrant body α0, and the valve body α4 is moved against the valve seat O. #I, so that it can be opened and closed.

(Problem to be solved by the invention) However, with conventional water hydrants, for example, when trying to release water during artificial snowmaking work, workers have to go around each of the water hydrants installed in large numbers at a ski resort. The handle @ 9 must be turned in the opening direction to open the valve body 0, and when stopping water discharge, each handle (to) must be turned in the closing direction to close the valve body αJ. Not only is this necessary, but the drain device α4 must be opened manually at the same time as the valve body a3 is closed, making the work long and extremely complicated. Working at night or in extremely cold conditions poses many safety issues for workers.
The simplification of work for water hydrants has not been covered.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a water-use plant that can shorten and simplify the work and save labor.

(Measures for Solving the Problems) According to the present invention, the above-mentioned object is to provide an hydrant body having a hollow cylindrical shape and a valve seat provided in the nozzle portion of the hydrant body. an inlet, a drain device that is installed near the valve seat of the hydrant body and can be opened to release water in the hydrant body when the inflow water in the hydrant body drops below a predetermined pressure; It is inserted coaxially and movably in the axial direction into the hydrant body with the water outlet provided on the other end side, and when it is displaced to the one end side of the hydrant body within the hydrant body, it seats on the valve seat and the water flows out. A drive sleeve into which the other end of the rod-shaped valve stem is inserted and screwed onto the other end of the rod-shaped valve stem to which the valve body for closing the introduction portion is attached;
This is accomplished by providing an electric water hydrant comprising an electric motor attached to the other end of the hydrant body and rotatably connected to the drive sleeve via a coupling device.

(Function) According to the water hydrant according to the present invention configured as described above, the valve stem can be moved forward and backward by activating the electric motor and rotating the drive sleeve. Since the body can be moved in and out of the hydrant body, it is possible to automate the opening and closing of the valve, and when the valve body is opened, the drain device can be effectively opened automatically due to the drop in water pressure within the hydrant body.

(Embodiment) Referring to FIGS. 1 to 4, the electric type water hydrant according to the present invention is equipped with a hollow cylindrical hydrant body QO (1), and water is introduced into one end of the hydrant body QO. A part αυ is provided. This water introduction part 0υ can be connected to a water supply pipe (not shown) connected to a water supply source using a fixture such as a port. A retaining wall a having porous holes through which water can freely flow is formed in the water inlet portion αυ of the enclosure, and a valve seat O is provided inside the retaining wall 0 at a slight distance from the retaining wall 0. Further, a drain device α4 is attached to the water introduction portion αυ on the radially outer side along the inner surface of the valve seat α3a), and this drain device α4
There is a drain hole (G) that can draw out the water in the hydrant body QO, and a non-return check that opens when the inflow water in the hydrant body α0 drops below a predetermined pressure and releases the water in the hydrant body αO. and a valve (4).

On the other hand, a water outlet portion protruding radially outward is provided on the other end side of the hide body αO, and this water outlet C17) is communicated with, for example, a nozzle for making artificial snow. In addition, a rod-shaped valve stem (2) is inserted coaxially into the hydrant body aO and extends coaxially from the other end side to the one end side of the hydrant body α0, and whose tip is guided by the retaining wall α. In (G), when the valve stem side is displaced to the one end side of the hydrant body αQ in the hydrant body aO, the valve body α seats on the valve seat (2) of the water introduction part aυ and closes the water introduction part αυ. will be permanently installed. In addition, a threaded portion (]&L) is integrally fixed to the other end of the valve stem (T), and this threaded portion (18a) is screwed into the drive sleeve (1) so as to be movable in the axial direction thereof. be done.

Furthermore, a preferably reversible electric motor &υ is fixed to the other end of the hydrant body αQ, and the output column frame of the electric motor 12D is operatively connected to the drive sleeve frame via a locking portion. Also, the output column or the hydrant body (
It is rotatably held within the hydrant body aO via a bearing (c) disposed within the other end of the hydrant 10, and a retainer is provided at the connecting portion between the output column @ and the drive sleeve holder to hold it. (to) is placed. In addition, electric motor C
The υ is installed, for example, in a central control room in a ski resort, and it is light and heavy to install it so that the power supply can be turned on and off and the direction of rotation can be controlled remotely.

In addition, the valve stem (2) is provided so that it can be moved back and forth in the axial direction manually, for example, via a worm gear connection structure (not shown), by means of a handle attached to the side of the other end of the noridland main body QO. It is being

However, in the water hydrant having the above-mentioned configuration, preferably by remote control, if the electric motor (c) is rotated in one direction, the output column is connected to the threaded part Osa of the valve stem. The drive sleeve (4) is interlocked and the valve stem is displaced to the one end side of the hydrant body aO, and the valve body α9 follows this movement, so that the valve body α is seated on the valve seat 0 and water is introduced. Part aυ is in a closed state. Also, when the electric motor (c) is rotated in the reverse direction, the valve stem (g)
is displaced toward the other end of the hydrant body (10), and the valve body α9, which follows this movement, separates from the valve seat (2), and the water introduction part aυ becomes open.

On the other hand, when the valve body ag is seated on the valve seat O and the waterway from the water supply source to the water introduction part 0υ is cut off, the hydrant body 00
The water pressure of the inflowing water in the hydrant body 00 decreases, and the check valve (4) of the drain device α becomes lower than the set pressure, and the check valve μs opens and the residual water in the hydrant body 00 is discharged. It will be easily understood that when manual movement of the valve stem (g) forward and backward is required, this can be accomplished by manually rotating the nodle (g).

(Effects of the Invention) According to the water hydrant of the present invention configured as described above, the electric motor can move the valve stem and, in turn, the valve body relative to the valve seat, and/or move the valve body within the hydrant main body. When the inflow water pressure falls below a predetermined pressure, the drain device automatically opens, allowing remote control and centralized management.
Since there is no need to manually open and close a large number of water hydrants installed at ski resorts, etc., significant effects such as shortening and simplifying work and realizing labor savings are achieved.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of a part of the water hydrant according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the same, FIG. 4 is a partial sectional view of the same, and FIG. FIG. 2 is a cross-sectional side view of a part of a conventional water hydrant.

Claims (2)

[Claims] (1) A hollow cylindrical hydrant body, a water introduction part having a valve seat provided at one end of the hydrant body, and a water introduction part installed near the valve seat to the hydrant body to ensure that inflow water within the hydrant body is below a predetermined pressure. a drain device that can be opened to release water in the hydrant body when the hydrant body is lowered; a water outlet provided at the other end of the hydrant body; and a drain device that is coaxially and movably inserted into the hydrant body in the axial direction Inside the hydrant body, a rod-shaped valve stem is fitted with a valve element that seats on the valve seat and closes the water inlet when the hydrant body is displaced toward one end of the hydrant body, and the other end of the rod-shaped valve stem is inserted through the rod-shaped valve stem. An electric water hydrant comprising a drive sleeve screwed onto the other end of the hydrant body, and an electric motor attached to the other end of the hydrant body and rotatably connected to the drive sleeve via a coupling device. . (2) The coupling device is directly connected to the electric motor and rotatably held within the other end of the hydrant body via a bearing, and connects the output column to the drive sleeve via a locking portion, and the output column and drive sleeve. The electric water hydrant according to claim 1, further comprising a retainer arranged to hold the connecting portion.