JPH0235877Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to an indoor water stop valve for use in cold regions that allows water to be drained from pipes without opening the handle by operating the water drain valve during the cold season. be.

(b) Conventional technology 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 water faucet 6. Furthermore, when piping is provided to the second floor, a 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. 10 is an intake valve, and 11 is an indoor water stop valve provided on the riser pipe 7. The indoor water stop valve 11 is used to cut off the water supply to the second floor when the occupants on the second floor are absent for a long period of time or when the occupants on the second floor are absent during the day. When trying to drain water while sleeping, the handle of the water drain valve 3 is turned to let the water drain, but the water cannot be completely drained unless the indoor water stop valve 11 and faucet 9 are opened. However, this work was a hassle because the location of the water drain valve 3 and the locations of the indoor faucet 11 and the faucet 9 were far apart. Also, it was necessary to close the faucet 9 after draining water, which was also a hassle. As a result, some work was omitted, which led to the freeze. Therefore, Utility Model Application No. 1988-088389 filed by the same applicant eliminated the above-mentioned drawbacks.

(c) Problems to be solved by the invention However, when water is re-circulated to an indoor water stop valve for cold regions after draining water, the male thread 1 of the spindle 12
3 and the female thread 15 and between the spindle 12 and the gasket 31, and the space between the male thread 13 and the female thread 15 is narrow, making it difficult for water to escape, and this water may freeze and cause the handle 17 to rotate. There was a drawback that I couldn't do it. In view of the above, the present invention aims to provide an indoor water stop valve for use in cold regions, which utilizes the advantages of water drainage related to Utility Application No. 58-088389 and completely eliminates the above-mentioned disadvantages.

(d) Means for solving the problems The present invention will be explained below based on the attached drawings.The structure of the present invention is generally the same as that of Utility Application No. 1988-088389, but the new points are as follows. . That is, a vertical square groove 3 is formed in the male thread 13 of the spindle 12.
2 is provided, passes through the horizontal hole 20, and the spindle 12
It communicates with a vertical hole 10 provided at the bottom of the.

(E) Function As described above, when the spindle 12 is installed in the indoor water stop valve and the indoor water stop valve 11 and the water faucet 9 are closed, draining is performed by operating the handle of the drain valve 3. Although the valve 21 is initially in the positional relationship shown in FIGS. 3 and 5, water from the riser pipe 4 and riser pipe 7 up to the indoor water stop valve 11 is drained. Next, the water above the indoor water stop valve 11 in the riser pipe 7 pushes down the valve 21 by its own weight, and the position of the valve becomes as shown in FIGS. 4 and 6. The water will thus fall through the groove 25 and drain away. Since the intake valve 10 is provided, the pressure inside the riser pipe 7 will not become negative pressure. In draining water as described above, there is an effect that the water can be drained without opening the indoor water stop valve 11 and the faucet 9. Also, during drainage, water that has entered between the male thread 13 and female thread 15 of the spindle 12 and between the spindle 12 and the gasket 31 passes through the vertical groove 32 of the male thread 13 of the spindle 12 through the horizontal hole 20, and then flows through the horizontal hole 20 of the spindle 12. Water is drained from the valve 21 through a vertical hole 19 provided at the bottom.

(f) Effect of the invention As a result, when water is to be supplied in the morning after completing the drainage work, there is no residual water between the male thread 13 and the female thread 15 of the spindle 12, and between the spindle 12 and the gasket 31, and the water freezes. This feature allows the handle 17 to be turned without any problems.

[Brief explanation of the drawing]

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 for cold regions. FIG. 3 is a front cross-sectional view of the product of the present invention, showing the state when the valve is closed. FIG. 4 is a front cross-sectional view of the device of the present invention, showing the state when the valve is open. FIG. 5 is a partially cutaway front view of the spindle when the valve is closed. 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. 8th
The figure is a partially cutaway perspective view of the packing. Figure 9 is a three-dimensional view of the spindle.

Claims (1)

[Scope of utility model registration request] A vertical hole 19 is bored in the lower part of the spindle 12 and communicated with the outside through a horizontal hole 20. Inside the vertical hole 19 are a small disk portion 22, a cylindrical portion 23, and a large disk portion 2.
4, the small disc part 22 and the cylindrical part 23 accommodate the valve 21 divided into left and right parts by a vertical groove 25, and a gasket housing part 30 is provided at the bottom of the spindle 12.
In this indoor water stop valve for cold regions, which houses a gasket 27 having an inverted trapezoidal shape and having a through hole 28 in the center, a plurality of vertical square grooves 32 are provided in the male thread 13 of the spindle 12. An indoor water stop valve for cold regions that communicates with a vertical hole 19 provided at the bottom.