JPS5845343Y2 - Water supply antifreeze equipment in cold regions - Google Patents

Description

[Detailed description of the invention] This invention aims to prevent freezing of indoor water supply pipes at night in cold regions by automatically removing residual water in the pipes to reliably prevent freezing, and also to drain water. This eliminates the troublesome effort required to do so.

Hitherto, faucets with various structures have been known to be equipped with such antifreeze devices, but a well-known one is shown in Fig. 3 of Japanese Patent Application Laid-open No. 49-4225 (in the drawings of the present application). The one shown in Figure 6 a) of 1932, and the one shown in Figure 1 of Utility Model Application Publication No. 10903 of 1932 (the opening of Figure 6 in the drawings of the present application).

To explain the one in Fig. 6A, the branch faucet 41 is as follows.
This figure shows the structure of a branch faucet installed in the middle of a pipe connecting a water supply source and a water heater to supply water to the water heater and water faucet at the same time or alternately. By operating a valve stem 45, a through hole 42 and a drainage hole 43 are opened to remove residual water. 46, an idler valve 4 having a spherical crimp surface 47 made of a resilient material on the top surface;
In order to prevent freezing, the through hole 49 of the valve stem 45' communicates with the air hole 40' of the air 46 to introduce outside air into the antifreeze stopcock 44 and drain it. It is.

In the conventional systems described above, the main part of the invention is included in the structure of the valve stem for both of the two ports in Figure 6 A, and they are common in that water cannot be drained without operating the valve stem. Unless water is drained manually by manipulating the valve stem,
There is a possibility that freezing cannot be prevented.

The purpose of this invention is to solve the above-mentioned problems and to automatically drain indoor pipes by simply turning off the main water valve.

The basic configuration of this idea is to raise a part of the indoor piping,
At this high position, a valve body is installed, which has an inverted letter shape and has a mounting part for indoor piping at both horizontal ends, a screw port with a hole, and a valve port that communicates with this, and a valve chamber on the vertical side of the valve body. It is equipped with a float valve that is automatically activated by internal negative pressure, and a stopper with a constricted valve opening is attached to the screw opening that communicates with the valve chamber, and a cap with a hole is attached to prevent water from freezing. In this case, by simply operating the non-freezing water stop valve at the main valve, the vacuum in the indoor piping can be broken and all remaining water can be removed.

An embodiment of this invention will be described below based on the drawings.

In this embodiment, as shown in Figs. 1 to 3, A9, C, and II, the valve body 1 of the vacuum breaker valve is shaped like an inverted letter and has a valve port 2 inside at one horizontal end. and indoor piping A
A mounting part 5 is provided to be connected to the connecting part 3 of the valve port 2 via a backing presser 4, and a screw lower having a hole 6 at the other end is connected to the valve port 2.
A valve head 8 which opens and closes the valve port 2 is provided in communication with the screw lower part.
Insert the control valve 9 equipped with a screw.

The vertical side of the valve body 1 is provided with a screw hole 10 and a valve chamber 11, a screw hole 12 communicating with the valve hole 2 is bored in the bottom of the valve chamber 11, and an inner cylinder 14 having a through hole 13 is attached. , this inner cylinder 1
The collar 15 of No. 4 is provided with a small hole 13a that communicates with the through hole 13, and the other end face is provided with a notch 16, and the inner cylinder 14 has an inner bore 17 whose diameter is one size larger than the outer diameter of the inner cylinder 14. The float valves 18 are each provided with a valve head 20 made of foamed resin or the like and having a rib 19 in the axial direction on the outer periphery and a conical end face.

The plug 21 has a valve seat 22 and a socket 2 at the required angle of inclination on both end faces.
3, the valve seat 22 and socket 23 are communicated through a constricted valve port 24, the plug 21 is attached to the screw port 10, and the plug 21 is covered with a cap 26 having a hole 25. A cap 27 covering the pores 6 is fitted around the outer periphery of the screw lower.

The one shown in FIG. 4 is another embodiment in which the valve port 2 and the valve chamber 11 are communicated through a through hole 28, and a leg 29 is protruded on the end surface of the float valve 18a corresponding to the through hole 28. Set up

The indoor piping A has a non-freezing water stop valve 30 on the water supply piping B side.
A water faucet 31 is provided on the indoor side.

It should be noted that the non-freezing water stop valve 30 is a normal main valve from which residual water on the indoor piping A side flows out when it is closed.

In this invention, in order to flow water from the water supply pipe B to the indoor pipe A shown in Fig. 1, open the non-freezing water stop valve 30 at the indoor entrance, and the cold water will flow to the high places of the indoor pipe A. The mounting part 5 of the valve body 1 of the vacuum breaker valve provided in As pressure is applied to the surface to push it up, the float valve 18 rises and presses its valve head 20 against the symmetrical valve seat 22 of the stopper 21 as shown in FIG. 5A, thereby closing the valve port 24.

In this case, some of the cold water advances into the valve chamber 11 through the through hole 13a and the notch 16 of the inner cylinder 14, passes through the gap between the rib 19 around the float valve 18 and the valve chamber 11, and enters the valve opening 24. Although it may pop out a little, it is blocked by the cap 26 and falls into the socket 23.

In this way, the cold water reaches the end of the indoor pipe A, and the faucet 31 is opened for appropriate use.

Next, when draining water from indoor piping A to prevent freezing at night, operate the anti-freezing water stop valve 30 in the opposite manner as described above to block it, and water will begin to drain and drain the indoor piping. As the internal pressure of A decreases, the float valve 18 changes from the closed state shown in FIG. 5A to the open state shown in FIG. 2.

Therefore, in conjunction with the drainage of the non-freezing water stop valve 30, the cap 26
Outside air is introduced from the air hole 25, and this rush of air flows through the valve port 24.
The internal cavity 17 of the float valve 18, the notch 16 of the inner cylinder 14, the through hole 13, the valve opening 2, and It sequentially passes through the inside of the attachment part 5 and is introduced into the indoor piping A to break the vacuum inside.

Therefore, all the remaining water in the indoor piping A from the valve body 1 of the vacuum breaker valve to the non-freezing water stop valve 30 is discharged, so if you then open each water faucet 31 at the end, the remaining water in the indoor piping A will be discharged. At the same time, the remaining water in the valve chamber 11 is removed from the small hole 13a of the inner cylinder 14.

In addition, if the stopper 21 should be frozen when draining water, if the control valve 9 is operated in the reverse direction and the water is drained through the air hole 6 and the valve port 2, this route can be used. Air can be introduced into indoor piping A through the pipe.

This invention has the following advantages because it has the configuration as described in (-) above.

(1) The valve body is installed at a high position in the middle of indoor piping, and the valve chamber is equipped with a float valve that automatically opens and closes the valve port depending on internal pressure, so you can simply operate a single non-freezing water stop valve. By simply doing this, the vacuum in the indoor piping can be broken and any remaining water from the valve body to the non-freezing water stop valve can be automatically removed.

(2) Furthermore, since the valve port can be closed by the float valve with zero pressure during water flow, the float valve can be made to withstand use over time.

(3) A control valve is attached to the screw hole that has air holes and communicates with the valve port, so if the float valve is frozen when draining water, this control valve can be used. Since it can be opened automatically or manually, it can reliably drain water and prevent freezing with less effort than conventional ones.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of indoor piping equipped with this invention, Figure 2 is an enlarged sectional view taken along the line X-X shown in Figure 1, Figure 3 A is an enlarged plan view of this invention, and the mouth is of a float valve. 2 is an enlarged plan perspective view of the inner cylinder; 4 is an enlarged side sectional view of another embodiment; 5 is A when the valve is closed. FIG. 6A is a partially enlarged sectional view of another embodiment showing the aspect of the present invention, and FIG. 6A is an explanatory diagram of the prior art. Explanation of symbols of main parts 1... Valve body, 2, 2
4... Valve port, 5... Mounting part, 7, 10
．． 12...screw mouth, 6,25...stomata,
8,20...Valve head, 9...Control valve, 1
1 Valve chamber, 13, 13 a...Through hole, 14.17
...Inner cylinder, 16...Notch, 18,1
8 a... Float valve, 22... Valve seat, 21... Plug, 23... Socket, 26...
·····cap.

Claims (1)

[Scope of utility model registration request] A mounting part 5 is provided at one end on the horizontal side, a screw lower communicating with the outside and the air hole 6 is provided at the other end, and the screw lower is provided with a valve head 8 for opening and closing the valve port 2 communicating with the inside of the mounting part 5. A valve 9 is screwed onto the valve chamber 1, and a valve chamber 11 is provided on the vertical side to communicate with the screw opening 10.
An inner cylinder 14 having a through hole 13, a small hole 13a, and a notch 16 is provided in the inner cylinder 14 so as to protrude through the screw hole 12, and a float valve 18 made of foamed resin or other material having a valve cylinder 20 is installed inside the inner cylinder 14. A plug 2 is fitted through a cavity 17 and has a conical valve seat 22 and an inverted conical socket 23 communicating with each other through a valve port 24.
1, the plug 31 is attached to the screw lower, the valve body 1 is formed by fitting the cap 26 having the air hole 25 to the plug 21, and the valve body 1 is installed at a high position in the indoor piping A. A water supply antifreeze device for use in cold regions, characterized in that a valve port 24 is opened to introduce outside air when the pressure in a chamber 11 is negative.