JPH077403Y2 - Water tap - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a water drain plug for draining water from a pipe in a cold region.

(B) Conventional technology In cold regions such as Hokkaido, water pipes are buried below the freezing depth. This is because no matter how the temperature on the ground drops, water does not freeze in the ground below the freezing depth.

However, the branch pipe of each house connected to the water pipe becomes a rising pipe and reaches each room, so if the water is left unused for a certain period of time, water above the freezing depth of the branch pipe of each house may freeze. is there. Therefore, when going to bed at night or when a single person goes to work, it is necessary to drain the water in the branch pipe to the outside, and for this purpose, a water drain plug is used as shown in FIG.

In FIG. 1, the water pipe 1 is connected to a water drain plug 2, and the water drain plug 2 is connected to a branch pipe 3. The branch pipe 3 stands up in the building, and the operator operates the handle 10 indoors to cause the water drain plug mechanism to supply and drain water to and from the branch pipe below the freezing depth.

When the water is drained, the water in the branch pipe is discharged into the ground through the drain valve 4 of the water drain plug 2 to prevent freezing. Some water is wasted, but it is unavoidable to prevent freezing.

2 and 3 are front cross-sectional views each showing a draining state of a publicly known drain tap, and FIG. 2 shows an example in which a branch pipe mounting portion 21 is provided above the drain valve 4, and FIG. The illustration shows the branch pipe mounting part 21
Shows an example provided below the drain valve 4.

At the time of draining water, the water from the branch pipe mounting portion 21 to the water supply port (not shown) flows as shown by the arrow and is discharged from the drain valve 4. When all the water after the branch pipe mounting portion 21 is discharged here, the ball 5 normally built in the upper part of the drain valve 4 descends by its own weight and comes into close contact with the O-ring 6, so that groundwater, which is sewage, is discharged to the drain valve. Inflow to 4 is prevented.

(C) Problem to be solved by the invention However, in the conventional water drain plug as shown in FIG. 2 and FIG. 3, if foreign matter such as mud adheres to the ball 5 or the O ring 6, Since the 5 and the O-ring 6 cannot be brought into close contact with each other, groundwater which is sewage flows from the drain valve 4. In this case, the higher the groundwater level, that is, the more groundwater is located at a position shallower than the surface of the earth, the greater the inflow of sewage into the branch pipe 3. In this state, when the water tap is brought into the water supply state, the dirty water flowing into the branch pipe 3 comes out from the faucet. This is extremely unsanitary.

Further, as shown in FIG. 3, when the drain valve 4 is located higher than the branch pipe mounting portion 21, the water after the branch pipe mounting portion 21 is drained only up to the height of the O-ring 6 of the drain valve 4. Therefore, the drainage valve 4 must be installed deeper than the freezing depth as compared with the case where the drainage valve 4 is installed below, and the installation is time-consuming.

In view of the above points, when the water in the branch pipe 3 is drained, the present invention blocks the drain valve 4 side and the branch pipe 3 side from each other, and if the ball 5 and the O-ring 6 of the drain valve are not in close contact with each other. However, it is an object of the present invention to provide a drain tap that prevents groundwater from flowing into the branch pipe 3.

(D) Means for Solving the Problems In order to achieve the above object, the present invention has a water pipe mounting portion on one side of a lower body, a branch pipe mounting portion on the other side, and a drain valve below the branch pipe mounting portion. And a cylindrical piston that moves up and down in conjunction with the rotation of a spindle that is screwed into the inner wall of the main body exterior, and the vertical movement of the piston allows the water pipe mounting part and the branch pipe mounting part to communicate with each other, When draining water, the water pipe attachment part and the branch pipe attachment part are cut off, and the branch pipe attachment part is provided in the piston in the vicinity of the central portion and in the vertical hole up to the lower end of the piston connected to this lateral hole. The water drain plug is characterized in that it has a structure communicating with a drainage valve through a vertical hole, and a means for closing the hole is provided at a lower portion of the vertical hole.

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings.

FIG. 4 is a front sectional view showing an example of the water draining cap of the present invention when draining water, and FIG. 5 is a front sectional view showing the same state when supplying water.

The exterior of the water drain plug is composed of an upper body 8, an outer tube 7 and a lower body 26.

The spindle 9 is screwed onto the upper body and the handle is attached to the upper part.
10 is attached, the middle shaft 11 is attached to the lower part, the idle shaft 12 is attached to the lower part of the middle shaft 11, and the lower part of the idle shaft 12 is in contact with the cylinder parts 23, 24, 25 inside the lower body 4 Piston 20 in which individual O-rings 13, 14, 15, 16 are annularly mounted
Is attached. A lateral hole 17 is bored in the piston between the O-rings 13 and 14 to the vicinity of the center, and the lateral hole 17 communicates with a vertical hole 18 in the downward direction. Is also formed with a large diameter.

The upper body is screwed to the outer tube 7, and the outer tube 7 is screwed to the lower body.

The main body exterior is provided with a branch pipe mounting portion 21 on one side, a water pipe mounting portion 22 on the other side, and a drain valve mounting portion 4a on the lowermost side.

Further, the piston 20 is a cylinder portion 23 having a diameter smaller than the inner wall surface of the main body exterior on the lateral hole 17, and controls the flow of water from the water pipe mounting portion 22 to the branch pipe mounting portion 21. Thinner cylinder part 24, and cylinder part 25 with a diameter smaller than the inner wall surface of the main body, which shuts off the drain valve part and the water supply part
And is housed inside the lower body 26. Also,
A water pipe mounting portion 22 is provided below the cylinder portion 24, and a branch pipe mounting portion 21 is provided above the cylinder portion 24.

Reference numeral 28 is a pin for connecting the idle shaft 12 and the piston 20, and 29 is a pin for locking the ball 19 accommodated under the vertical hole 18 and retaining it in the vicinity thereof.

The features of the present invention are as follows.

The piston 20 is provided with a lateral hole 17 between the O-rings 13 and 14 that communicates with the outer pipe when water is supplied and communicates with the branch pipe mounting portion 21 when water is drained, and communicates with the lateral hole 17 in the vertical direction. Vertical hole
Place 18 near the center of the cylinder to the bottom.

The vertical hole 18 is formed at the lower part thereof in a tapered smooth surface having a large diameter, and a ball made of a material (for example, polypropylene) having a specific gravity of 1 or less, which is lighter than water, is engaged by the action of the pin 29. It has been stopped.

(E) Action FIG. 4 shows a state where the product of the present invention is draining water and the water in the branch pipe 3 is being discharged. At this time, the water in the branch pipe passes through the branch pipe mounting portion 21, the lateral hole 17, and the vertical hole 18 as shown by the arrow, and is discharged to the outside from the drain valve 4 mounted on the drain valve mounting portion 4a below. At this time, due to the water pressure of the branch pipe 3, the ball 19 accommodated in the lower portion of the vertical hole 18 descends, the vertical hole 18 and the drain valve communicate with each other, and the ball 5 of the drain valve floats. There is.

Here, since the drain valve 4 is mounted below the lower body 26, the water in the branch pipe mounting portion 21 is discharged to the water level at the drain valve outlet at the lower end of the lateral hole 17.

When the drainage is completed, the ball 5 descends due to its own weight and comes into contact with the O-ring 6 to prevent the inflow of groundwater, which is sewage.

However, as described above, in the unlikely event that foreign matter adheres to the ball 5 and the O-ring 6 and the adhesion is deteriorated, the ball 19 is made of a material lighter than water even if groundwater, which is sewage, is about to flow in. The rising force of buoyancy acts and the ball 19 and the tapered smooth contact surface 27 come into close contact with each other, so that the inflow of dirty water can be prevented. In this case, since the higher the groundwater level is, the higher the water pressure is, the upward force is largely exerted on the ball 19, and the close contact with the contact surface 27 is further increased.

FIG. 5 shows a state when the handle 20 is operated from the state of FIG. 4 and the piston 20 is raised to a predetermined position during water supply. At this time, the water flows from the water pipe mounting part to the cylinder part 24 as shown by the arrow.
Flows to the branch pipe attachment portion 21 through the side of. At this time, even if foreign matter adheres to the ball 5 and the O-ring 6 of the drain valve 4 and the adhesion is poor, the ball 19 rises due to buoyancy and comes into contact with the tapered contact surface 27 of the vertical hole 18. Ascend to the side hole
Entry into the mantle via 17 is prevented.

The present invention has been described above with reference to the embodiment shown in FIGS. 4 and 5. Instead of a ball floating on water, a C-shaped retaining ring fitted inside the vertical hole as shown in FIG. 6 is used. A weak conical spring 30 is provided on 31 to support the ball in contact with the contact surface,
The design can be freely changed without departing from the gist of the present invention, for example, the ball is separated from the contact surface by the action of the conical spring according to the flow of water.

(F) Effect of the device Since the device of the present invention is constructed as described above, by installing the drain plug of the device of the present invention, even if the ball and the O-ring housed in the drain valve are not completely in close contact with each other, The action of the ball blocks the inflow of dirty water into the branch pipe. In addition, since the drain valve is installed at the lowermost position, there is little residual water in the branch pipe when draining water.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of use of a water drain plug, FIGS. 2 and 3 are front sectional views showing a conventional water drain plug example when draining water, and FIG. 4 is a water drain plug according to the present invention. FIG. 6 is a front sectional view showing an example of draining water, showing a state where water in a branch pipe is being discharged, and FIG. 5 is a front sectional view showing the same when water is supplied.
FIG. 3 is a front sectional view showing another water tap according to the present invention when supplying water. Reference numerals in the drawing: 1 ... Water pipe; 2 ... Water tap; 3 ... Branch pipe; 4 ... Drain valve; 4a ... Drain valve mounting part; 5,19 ... Ball; 6,13,14,15,16 ... O-ring; 7 ...
Outer tube; 8 ... Upper body; 9 ... Spindle; 10 ... Handle; 11 ...
Medium shaft; 12 ... Idler shaft; 17 ... Horizontal hole; 18 ... Vertical hole; 20 ... Piston; 21 ... Branch pipe mounting part; 22 ... Water pipe mounting part; 23, 24, 25 ... Cylinder part; 26 ... Lower body 27 ... Contact surface; 28, 29 ... Pin; 30
… Conical spring; 31… C type retaining ring.

Claims (2)

[Scope of utility model registration request] 1. A water pipe mounting portion 22 on one side of the lower body 26,
On the other hand, a branch pipe mounting portion 21, a drain valve 4 below the branch pipe mounting portion 21, and a cylindrical piston 20 that moves up and down in conjunction with the rotation of a spindle 9 that is screwed into the inner wall portion of the main body exterior.
When the water is supplied by the vertical movement of the piston 20, the water pipe mounting portion 22 and the branch pipe mounting portion 21 communicate with each other, and when draining water, the water pipe mounting portion 22 and the branch pipe mounting portion 21 are blocked and the branch pipe mounting Portion 21 is a lateral hole provided near the center of piston 20.
17 and a structure which is connected to the horizontal hole 17 and communicates with the drainage valve 4 through a vertical hole 18 which is vertically provided up to the lower body 26, and a means for closing the hole is provided below the vertical hole. A water tap that is characterized by 2. The means for closing the hole comprises a ball made of a material having a specific gravity of 1 or less in the lower portion of the vertical hole formed in a tapered shape from the upper portion of the vertical hole so as to have a larger diameter. The water drain plug according to claim 1, wherein the water drain plug is a one.