JPS6022130Y2 - Freeze prevention faucet drain valve - Google Patents

Description

[Detailed description of the invention] This invention is mainly used in cold regions to remove water accumulated in the primary water supply side and the secondary water supply side when draining the water inside the water supply equipment. Regarding drain valves.

Various types of antifreeze faucets have been known in the past, but one of the most common structures is the
Figures 1 and 2 of Publication No. 2315, Utility Model Publication No. 48
There are figures 1 and 2 of the -585 official publication.

To explain the former case in FIGS. 1 and 2, the antifreeze valve 18 is loosened to open the small hole 6 and communicate the chambers 2 and 3, and in this state, both valve seats 9 and 12 are closed. The fluid in chamber 2 flows into chamber 3 through the small hole 6 and flows out from the discharge pipe 16, so that the fluid in chambers 2 and 3 constantly flows to prevent freezing. .

To explain the latter case shown in FIGS. 1 and 2, the water supply control valve 10 slightly opens the conduit 8 between the introduction chamber 2 and the separation chamber 3 to supply a small amount of cold water without completely shutting off the flowing water. The amount is fed into the separation chamber 3, and the valve body 1 of the switching control valve 13
5 is located in the middle of the separation chamber 3, the water supply valve chamber H1, the separation chamber 3, and the supply chamber 7 are communicated with each other, and a small amount of cold water is constantly discharged to the outside via the hose P, thereby preventing freezing. It is planned.

For this reason, fluid is constantly being discharged, albeit in a small amount, resulting in wasteful use of fluid.

Also, if a drain valve is installed on only one side, it will not be possible to drain water from the opposite side of the check valve, and if drain valves are installed on both sides, it will take twice as much time and effort. There is no choice but to provide a water drainage mechanism.

This invention solves these problems and uses a single drain valve.
The purpose is to simultaneously drain water from the primary and secondary sides of water supply and hot water supply equipment.

The basic structure of the present invention is that the two chambers of an antifreeze faucet are connected to the bottom wall of the anti-freeze faucet, which is equipped with two chambers that are communicated with and shut off from each other by a check valve that can freely come into contact with the valve opening. By providing two vent holes adjacent to each other and providing one common valve that can be raised and lowered to open and close both of the vent holes, the water in the two chambers can be removed. This is to simultaneously drain water and simplify the structure of the antifreeze faucet.

The details of the present invention will be explained below with reference to the accompanying drawings.

A water introduction chamber 2 and a water supply chamber 3 are divided on both sides of the partition wall 6, and one side of the water introduction chamber 2 is open so that it can be connected to the primary pipe A side as shown in Fig. 1. It is a provision.

A valve port 5 is formed in the partition wall 6 between the water guide chamber 2 and the water supply chamber 3, and a valve 4 that can be raised and lowered toward the valve port 5 is provided in the water supply chamber 3.
A handle 19 is attached to the upper end of the valve 4 and is rotatable via the valve stem 4a.

A check valve chamber 11 is formed on the side of the water supply chamber 3 with the side open at the valve lower, and the open side can be connected to the secondary pipe A' side as shown in Fig. 1. It is set up like this.

This embodiment is an anti-freeze faucet comprising a water supply chamber 3 on the primary side and a check valve chamber 11 on the secondary side, which are communicated with and isolated from each other by a check valve 8 disposed in a freely abutting manner on the valve lower.

A check valve 8 is provided in the check valve chamber 11 toward the valve lower between the water supply chamber 3 and the check valve 11, and a ring 9 is fixed inside the open side of the check valve chamber 11. and check valve 8
A spring 10 is loaded between the spring 1 and the spring 1.
0 presses the check valve 8 toward the valve lower side.

2 on the bottom wall adjacent to the two chambers, water supply chamber 3 and check valve chamber 11.
Two ventilation holes are provided that communicate with each chamber.

That is, a vacuum breaker valve chamber 14 whose lower side is open is provided protrudingly below the bottom wall of the adjacent portion of the two chambers, and the vacuum breaker chamber 14
A first vent hole 13 is provided between the vacuum breaker chamber 14 and the water supply chamber 3, and a second vent hole 12 is provided independently between the vacuum break valve chamber 14 and the check valve 11.

In the vacuum breaker valve chamber 14, a common valve 15 is provided which can be raised and lowered to open and close both the first and second ventilation holes 12 and 12 at the same time. It is.

More specifically, both vent holes 12 and valve 15 towards the 13 side.
A knob 17 having a through hole 16 inside is mounted so as to be movable up and down from the open side of the vacuum breaker valve chamber 14 toward the first vent hole 13 and the second vent hole 12.

To explain how to use this method, when water is supplied to the water heater B installed on the secondary side during the daytime as shown in Fig. 1, water is supplied by operating the handle 19 of the faucet 1 as shown in Fig. 2. Teben 4
is raised and the valve port 5 is opened.

In this way, the fluid on the primary pipe A side is allowed to proceed through the water introduction chamber 2 and the valve port 5 to the water supply chamber 3 in the direction of the arrow shown in the figure, and the check valve 8 that closes the valve lower is caused by the elasticity of the spring 10 due to the internal pressure caused by the fluid. The valve lower is opened by pressing against the repulsive force toward the spring 10, and the fluid from the water supply chamber 3 is transferred to the check valve chamber 1.
1, and connect the secondary pipe A' as shown in Figure 1.
After water supply is completed, the valve 4 is lowered by operating the handle 19 to close the valve port 5, and the water is supplied to the water heater B through the primary pipe A.
Turn off the water supply from the side.

On the other hand, at night in winter, the primary pipe A is
To drain water from the secondary pipe A' water heater B and the faucet C on the water heater B side, operate the antifreeze water drain valve 20 buried underground on the primary pipe A side. Let the water drain.

Then, as shown in FIG. 3, the handle 19 is operated to raise the valve 4 from the valve port 5 and open the valve port 5.

In this state, operate the knob 17 to lower it in the direction of the arrow.

Thus, the valve 15 in the vacuum breaker valve chamber 14 is lowered, the first vent hole 13 and the second vent hole 12 are respectively opened, and since both vent holes 12.13 communicate with the vacuum breaker valve chamber 14, the knob 17 is opened. Through the inner through hole 16, the outside air enters the vacuum breaker valve chamber 14, both ventilation holes 12.13, and one of the water supply chambers 3,
The water is supplied to the primary pipe A side through the valve port 5 and the water introduction chamber 2 in this order, and the vacuum inside each is broken.

On the other hand, the outside air entering the check valve chamber 14 from the second vent hole 12 is supplied to the secondary pipe A', the water heater B, and the faucet C, thereby destroying the vacuum inside each of them.

Therefore, the fluid inside the primary pipe A side and the secondary pipe A' side is discharged to the outside from the through hole 16 of the knob 17 in a direction opposite to the intrusion path of the outside air.

Further, the fluid on the primary pipe A side is discharged into the ground through an antifreeze drain faucet 20 buried underground.

Since this invention has the above configuration, it has the following advantages.

(1) Unlike conventional systems, water can be reliably drained from the primary piping side and the secondary piping side, so freezing can be prevented without constantly draining a large amount of fluid.

Therefore, wasteful drainage of fluid can be avoided.

(2) Draining water from the primary piping side and the secondary piping side across the check valve can be performed simultaneously by operating a single knob, which saves time and effort.

If drain valves are installed independently on the primary piping side and the secondary piping side, if either drain valve is not opened, water cannot be drained from one side and freezing cannot be prevented. Case--Because it is carried out individually, there is no chance of water supply or hot water supply equipment being frozen and destroyed due to forgetting to operate it.

[Brief explanation of drawings]

Figure 1 is a front view showing the state of use of the present invention, Figure 2 is a longitudinal cross-sectional view of the main part of the present invention, and Figure 3 is a longitudinal cross-sectional view of the main part showing the principle of simultaneous vacuum break in the primary and secondary piping. It is. Explanation of symbols of main parts, 7... Valve mouth, 3...
...Check valve, 12...Second ventilation hole, 13...
...First vent, 15...Valve.

Claims (1)

[Scope of utility model registration request] They communicate with each other through a check valve 8 that can freely come into contact with the valve lower.
In an antifreeze faucet with two chambers that can be shut off, two ventilation holes 12 and 13 are provided in the bottom wall of the two chambers of the faucet, communicating with the two chambers, respectively, and A drain valve for an anti-freeze faucet, which is provided with one common valve 15 that can be raised and lowered to open and close both ventilation holes at the same time.