JPS6323485Y2 - - Google Patents

Description

[Detailed explanation of the invention] In cold regions such as Hokkaido, water pipes are buried underground below the freezing depth. This is because no matter how much the temperature on the ground drops, water will not freeze underground below the freezing depth. However, the branch pipes connected to the water pipes are led to each house, and if the tap water is left unused for a certain period of time, the water in the branch pipes of each house may freeze. Therefore, it became necessary to release the water in the branch pipes into the ground when people were out for long periods of time during the day or when they went to bed, so drain valves were devised. As shown in FIG. 1, the drain valve 1 has a water pipe attachment part 3 attached to the water pipe 2, a branch pipe attachment part 4, and a discharge part 5, and one end of the branch pipe 6 is connected to the branch pipe attachment part 4. The other end is connected to a horizontal pipe 7, and the horizontal pipe 7 is connected to a faucet 8. Normally, tap water is used by opening and closing the faucet 8, but when going to bed, etc., operate the handle 9 of the drain faucet 1 to open and close the valve at the bottom of the drain faucet 1, and use the tap water to connect the branch pipe 6 and the horizontal pipe. The water in 7 is discharged into the ground from the discharge part 5. The above is the configuration of the drain valve.

In the case of a one-story building, the above configuration was sufficient, but in the case of a residence with two or more stories, the drain valve 10 is connected to the horizontal pipe 7, and the riser pipe 11 connected to the drain valve 10 is led to the second floor. The water flows through the horizontal pipe 12 and reaches the faucet 13. Also, the water drain valve is drain pipe 14.
is connected to. The drain pipe 14 is led underground below the freezing depth. If you want water to be supplied to the first floor and water stopped only to the second floor, use the water drain valve 1.
Operate handle 15 of 0 to stop the water. At this time, the water in the riser pipe 11 and the horizontal pipe 12 is discharged from the drain pipe into the ground below the freezing depth.

Today, the above configuration is often used, but when draining water by operating the handle 9 of the drain valve 1, if negative pressure is generated in the horizontal pipe 7, water will remain in the pipe. This can cause freezing, and in order to solve this problem, a method of installing an intake valve on the horizontal pipe 7 has been used, but if the pipe is on the second floor or higher, it is essential to install a drain valve 10. If 10 is provided with an intake function, an intake valve becomes unnecessary. The present invention focuses on the above points and aims to provide a novel drain valve having an intake function.

In order to achieve the above object, the present invention has the following configuration. An embodiment shown in the accompanying drawings will be described in more detail below. The drain valve 10 consists of an upper body 16 and a lower body 17, and the lower body 17 has an inlet port 1.
8. It has an outlet 19 and a drain 20, the inlet 18 is connected to the horizontal pipe 7, the outlet 19 is connected to the riser pipe 11, and the drain 20 is connected to the drain pipe 14. 1
5 is a handle, 21 is a spindle, 22 is a piston suspension, 23 is an upper part of the piston, and 24 is a lower part of the piston. The handle 15 is attached to a spindle 21, and the spindle 21 is carved with a square thread. The piston suspension has a corner female thread cut inside and is screwed into the corner thread of the spindle 21. At the bottom of the piston suspension 22 is a piston upper part 2.
3 is attached, and a piston lower part 24 is attached to the lower part of the piston upper part 23. 25, 26, and 27 are all O-rings. When the handle 15 is turned, the upper piston 23 and lower piston 24 move up and down. Figure 2 shows the state of the water drain valve when water is being supplied.
Water entering from the inlet 18 is guided to the outlet 19,
It reaches the faucet 13. When the piston is lowered by turning the handle 15, the water is stopped as shown in FIG. Water is blocked by O-rings 23 and 24 and does not reach the outlet. The water in the horizontal pipe 12 and the riser pipe 11 is led from the outlet 19 to the discharge port 20, and is discharged underground from the drain pipe 14. The above is the same as that of a known drain plug.

The novel features of the invented product are as follows. 2
8 is a small hole bored in the upper part of the lower main body 17.
29 is a small hole provided at the bottom of the spindle 22. 30 is a space between the lower mounting portion of the spindle 22 and the upper piston 23. 31 is a small hole provided in the lower part of the upper piston 17 and communicates with the internal chamber 32. Further, the through hole 33 communicates the chamber 32 and the space 30. 34 is a small ball provided in the chamber 32. 35 is an O-ring.

When using the product of this invention, when water is being supplied to the second floor, the situation will be as shown in Figure 2, and the water will flow from the small hole 31 to the room 3.
2, the small ball 34 is lifted up by the water pressure and comes into close contact with the O-ring 35, and does not go any further upward. When water is stopped, the state shown in Fig. 3 is the same as when water is supplied. The water drain valve 10 is turned off,
When the drain valve 1 is turned off and negative pressure is generated in the horizontal pipe 7, external air flows from the small hole 28, through the small hole 29, and through the gap 30, as shown in FIG. It reaches the through hole 33, pushes down the small ball 34, passes through the chamber 32 and the small hole 31, and reaches the inlet 18, eliminating the negative pressure in the horizontal pipe 7 and making the pressure the same as atmospheric pressure. No water remains in the 7th class, and it is completely discharged to the outside.

Since the present invention has the above structure and operates as described above, it functions as a water drain valve as well as an intake valve, and can completely drain water even when negative pressure is generated in the horizontal pipe. , has the effect of preventing freezing.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the relationship between a drain plug and a drain valve. FIG. 2 is a front sectional view of the product of the present invention, showing the state when water is being supplied. FIG. 3 is a front sectional view of the product of the present invention, showing the state when water is stopped (draining water). FIG. 4 is a front sectional view of a part of the device of the present invention, showing a state in which an air intake operation is performed.

Claims (1)

[Scope of utility model registration request] The apparatus is made up of an upper body 16 and a lower body 17 having an inlet 18, an outlet 19, and an outlet 20. The apparatus is provided with a spindle 21 which can be raised and lowered by operating a handle 15.
The piston suspension 22, the piston upper part 23, and the piston lower part 24 are accommodated in the lower body 17.
A small hole 28 is drilled in the upper part of the piston, a small hole 29 is provided in the lower part of the piston suspension so as to communicate with the space 30 between the piston suspension 22 and the upper piston 23, a chamber 32 provided in the upper piston 23 is connected to a small horizontal hole 31 and a through hole 33 in the vertical direction, an O-ring 35 is provided above the chamber 32, and a small ball 34 is contained in the chamber 32, forming a water drain valve with an intake function.