JPS6346523Y2 - - Google Patents

Description

[Detailed explanation of the invention] In cold regions such as Hokkaido, water in water pipes often freezes during the winter. As a countermeasure to this problem, drain valves have been devised that drain the water in the pipes before going to bed and drain them underground below the freezing depth, and are now used in the majority of households.
As shown in Fig. 1, the plumbing in a general household is such that a water pipe 1 located underground below the freezing depth is connected to a drain valve 3 having a drain valve 2, and a riser pipe 4 and a horizontal pipe 5 are connected to the drain valve 3. and then reaches the faucet 6. When the water is to be further piped to the second floor, the riser pipe 7 is connected to the horizontal pipe 5, and the water is led to the horizontal pipe 8 and faucet 9, and water is also supplied to the second floor. 11 is riser pipe 7
This is an indoor water stop valve installed in the middle of the road. Indoor water stop valve 1
1 is for cutting off the water supply to the 2nd floor when the occupants on the 2nd floor are absent for a long time or when the occupants on the 2nd floor are absent during the day, and the known indoor water stop valve is shown in Figure 2. As shown in the figure, a screw 13 is cut into the spindle 12 and screwed into a female thread 15 cut inside the main body 14. A packing 16 is housed at the lower end of the spindle, and by turning a handle 17 attached to the spindle 12, the spindle 12 is inserted. Up and down, Patsukin 1
When the valve 6 contacts the valve seat 18, the water stops. 19 is a seal that prevents water from leaking to the top. When you want to drain the water in the riser pipe or horizontal pipe to prevent freezing while sleeping or going out for a long time, operate the handle of the drain valve 3 to drain water from the drain valve that is below the freezing depth. Complete drainage will not occur unless the water stop valve 11 and faucet 9 are opened. However, this work was troublesome because the location of the water drain valve 3, the indoor water stop valve 11, and the faucet 9 are usually located far apart. In addition, it was necessary to close the faucet 9 after draining water, which was also troublesome. As a result, some tasks may be omitted,
This sometimes led to freezing. In addition, water enters between the thread 13 of the spindle 12 and the female thread 15, and this water freezes and causes the handle 17
In some cases, it was not possible to rotate the The object of the present invention is to provide an indoor water stop valve for cold regions that eliminates the above-mentioned drawbacks of known products. In order to achieve the above object, the present invention has the following configuration. A more detailed explanation will be given below with reference to an embodiment shown in the accompanying drawings.
The structure of the indoor water stop valve of the present invention is generally the same as that of a known product, but the novel points are as follows. That is, a vertical hole 20 is provided in the lower part of the spindle 12, and communicates with the outside through several horizontal holes 21. A valve 22 is accommodated in the vertical hole 20. As shown in FIGS. 5, 6, and 7, the valve 22 has a small disk portion 23,
It consists of a cylindrical part 24 and a large disc part 25, and the small disc part 23 and the cylindrical part 24 are divided into left and right sides by a vertical groove 26. Also, the small disk portion 23 is the groove 2.
Since the two sides are chamfered in the direction perpendicular to 6, each cross section has a semicylindrical shape. Reference numeral 28 denotes a packing, which has a through hole 29 in the center as shown in FIG.
be accommodated in. Further, as shown in FIGS. 3, 4, and 5, a groove 32 is formed in a portion of the spindle 12 below the screw 13, and an O-ring 33 is accommodated therein.
To install the product of the present invention, it is necessary to provide an intake valve 10 on the outflow side, as shown in FIG. 9. faucet 6,
When draining water by operating the handle of the drain valve 3 under the condition that the valve 9 is closed, the valve 22 is initially closed.
Although the positional relationship is as shown in Fig. 5, if the inside of the pipe becomes negative pressure, water cannot be drained. Therefore, an intake valve 10 is required to eliminate negative pressure, and when this valve operates, air is admitted into the pipe, and the indoor water stop valve 11 of the riser pipe 7
The water above enters the vertical hole 20 from the horizontal hole 21 under its own weight and pushes down the valve 22, and the valve position is as shown in Figures 4 and 6.The water falls from the groove 26 and all the water in the pipe is removed. It is discharged from the drain valve 2.

As described above, the product of the present invention can automatically drain water without requiring the operation of an indoor water stop valve. Therefore, it is effective in eliminating the drawbacks of known indoor water stop valves when draining water. Further, the groove 32 is the spindle 1
It is located below the screw 13 of No. 2, and the O-ring 33 is housed here, so water is blocked by the O-ring 33 and does not enter between the screw 13 and the female screw 15, so freezing occurs in this part. It has a reliable effect.

To start water supply, operate the handle of the drain valve 3, and the water will flow to the riser pipe 4 and riser pipe 7.
By pressing the large disk 25 from below, the valve 22 returns to the state shown in FIG. 6, and the water is closed. When attempting to supply water to the second floor, the handle 17 is turned to raise the spindle 12, and water is led to the faucet 9.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the plumbing in a general household. FIG. 2 is a front sectional view showing a known indoor water stop valve. FIG. 3 is a front cross-sectional view of the product of the present invention, showing the state in which the valve is closed, that is, the water supply above the indoor faucet is blocked. Fig. 4 is a front cross-sectional view of the device of the present invention when the valve is open, that is, when water is being drained; Fig. 5 is a front view with a part of the spindle cut away, when the valve is closed. Indicates when FIG. 6 is a partially cutaway front view of the spindle when the valve is open. Figure 7 is a perspective view of the valve. FIG. 8 is a partially cutaway perspective view of the O-ring. FIG. 9 is a schematic diagram showing the piping to which the product of the present invention is attached.

Claims (1)

[Scope of utility model registration request] A valve seat is opened and closed by a spindle 12 attached to a riser pipe and screwed into a main body 14, and a gasket housed in the lower part of the spindle, and a groove 32 is bored on the outside of the lower part of the spindle 12. The O-ring 33 is housed in the horizontal hole 21, and a vertical hole 20 is bored inside to communicate with the outside through the horizontal hole 21.
It consists of a cylindrical part 24 and a large disc part 25. The small disc part 23 and the cylindrical part 24 accommodate the valve 22 divided into left and right sides by a vertical groove 26, and a gasket housing part 31 is provided at the bottom of the spindle 12. , an indoor water stop valve for cold regions, which houses a gasket 28 having an inverted trapezoidal shape and having a through hole 29 in the center.