JP2517234Y2 - Water tap - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention belongs to the field of water distribution equipment,
The present invention relates to a water stopper for the purpose of preventing freezing.

[0002]

2. Description of the Related Art In a cold-preventing water stopper (invention of Japanese Patent No. 607455) intended to prevent freezing, a piece board is loosely fitted to the lower end of a spindle so that the piece board can be mounted on the spindle in a desired position. It is intended to prevent intermediate drainage by suspending with power and temporarily maintaining water shutoff when switching valves due to elasticity, but it is a specification that corresponds to the elasticity of coil spring and water pressure. Depending on the water pressure, it may be difficult to maintain the stopping power at high water pressure and intermediate drainage may occur.

[0003]

[Problem to be solved by the present invention] In view of the above, the present invention
The water supply pressure is used regardless of the water supply pressure to temporarily maintain the water stopping power, thereby providing a drain tap without intermediate drainage under any water pressure environment.

[0004]

DISCLOSURE OF THE INVENTION The water drain plug of the present invention comprises a cap nut having a piece plate for seating on a water shutoff valve seat, which has a required insertion hole, at the lower end of a spindle inserted in a water tap base. In a cold-preventing water faucet, which is loosely fitted up and down through a required water chamber formed between the inner bottom seat of the piece board and the lower end surface of the spindle, and prevents the piece from coming off, the piece board is watertight with respect to the spindle. It is fitted in a circular shape, and a water guide hole is formed at the center of the bridge so that the stroke at the lower end of the spindle in the water chamber
Ri, packing for opening and closing the drainage groove loosely fitted to the spindle
The stroke between the groove and the drain groove is short, and the pressure receiving area of the inner bottom seat is larger than the area of the communication hole of the water shutoff valve seat.

[0005]

The pressure water enters the water chamber through the water guide hole, and presses the bridge plate against the water stop valve seat with a pressing force corresponding to the area difference between the pressure receiving area of the inner bottom seat and the area of the communication hole.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment. A stopper box 1
A spindle 3 is threadedly inserted into a plug base 2 screwed on the upper part of the, and a piston 4 is integrally joined to the lower end of the spindle 3,
An O-ring 6 is fitted on the bulging portion 5 at the lower end of the piston 4, and the bulging portion 5 is fitted inside a cylindrical piece board 8 having an inner diameter larger than the diameter of the communication hole 7 of the stopper box 1. The outer circumference of the bulge 5 and the piece board 8
The inner periphery of the cap nut 9 is kept watertight, and the cap nut 9 fitted onto the piston 4 is screwed onto the outer periphery of the bridge plate 8 so that the upper peripheral portion of the cap nut 9 is attached to the bulging portion 5. It is prevented from coming off, and a required water chamber 11 is formed between the lower end surface of the bulging portion 5 and the inner bottom seat 10 of the piece board 8, and the spindle is provided by the height of the water chamber 11 (gap S) via the piston 4. 3, the piece board 8 is vertically movable, and a water guiding hole 13 communicating with the water chamber 11 is formed at the center of the connecting projection 12 hung vertically from the center of the lower surface of the piece board 8 to form the step of the connecting projection 12. A packing 15 is fitted and sandwiched between the portion 14 and the lower surface of the piece board 8, and a packing 19 for closing a drain groove 18 communicating with the drain hole 17 is provided on the upper surface of a washer 16 which is loosely attached to the lower portion of the thread of the spindle 3. One end of the spring 20 that is fitted and is fitted on the lower surface of the piston 4 is engaged with the other end of the spring 20. Formed by fastening the upper face of the cap nut 9 at the required mounting load.

In the water drain plug a thus constructed, in the water passing state shown in FIG. 1, the spring 20 fitted on the piston 4 presses the packing 19 through the washer 16 so as to close the drain groove 18, and The water flows from the water inlet 21 to the water outlet 23 through the communication hole 7 around the water shutoff valve seat 22 around the upper surface. At this time, the gap S is maintained by the spring 20 in order to allow water to pass from the water guide hole 13 to the outer space of the water chamber 11 and the bridge 8 and the cap nut 9.

When the spindle 3 is lowered to stop the water from the state shown in FIG. 1, the packing 15 is seated on the water stop valve seat 22 while maintaining the gap S as shown in FIG. Since the pressure receiving area of the inner bottom seat 10 of 8 is larger than the area of the communicating hole 7 by the required area, the packing 15 is pressed against the water shutoff valve seat 22 by the pressing force of the water pressure corresponding to the area, and any water pressure environment The water-stop state is reliably maintained even underneath.

When the spindle is further lowered from the state shown in FIG. 2, the bottom of the expanded diameter portion 5 of the piston 4 in the water chamber 11 is lowered.
From the surface stroke (gap s) , loosely fit the spindle 3
The packing 19 for opening and closing the drain groove 18 and the drain groove 1
Or a stroke is short et between 8 and bottom surface of the bulge 5
Before descending by the gap s and contacting the inner base 10 of the piece board 8
Then, the lower end of the thread of the spindle 3 is fitted into the packing 19.
The upper peripheral surface of the washer 16 is pushed down , as shown in FIG.
As shown, when the bottom surface of the bulging portion 5 is pressure-bonded to the inner bottom seat 10 of the piece board 8, the packing 1 is fitted on the upper surface of the washer 16.
9 completely opens the drainage groove 18 to drain the water on the secondary side to the drainage hole 1
Drain from 7

Next, the valve switching from the state shown in FIG. 3 to the water passing state will be explained. As the spindle 3 rises, the packing 19 fitted in the washer 16 rises due to the pressing force of the spring 20, while the piece Pressure water enters the inner bottom seat 10 of the board 8 through the water guide hole 13, and presses the piece board 8 against the water stop valve seat 22 with a pressing force corresponding to the area difference between the area of the inner bottom seat 10 and the area of the communication hole 7. and, and water stopping completely until the gap S by the spindle 3 rises crimp packing 15 in water stop valve seat 22, during which time, with the configuration described above, the spindle 3
The lower end of the screw thread is completely separated from the upper peripheral surface of the washer 16.
Because there, drainage groove 18 is pressed by the pressing force of the spring 20
Is completely closed by the packing 19 that is formed, and then the bulging portion 5 of the piston 4 is engaged with the upper portion of the cap nut 9,
As the spindle 3 rises, the bridge 8 rises, the packing 15 separates from the water shutoff valve seat 22, and the communication hole 7 opens,
Water will flow without intermediate drainage. As an extension of this invention, as a technique for stabilizing the life of the packing seated on the water shutoff valve seat, the area of the inner bottom seat is made almost equal to the area of the communication hole, and the lower end of the spindle and the inner bottom seat are What kind of water pressure environment can be obtained by inserting springs and setting the mounting load (pressure force of packing on the still water valve seat) to a pressure force corresponding to the area difference between the inner bottom seat and the communication hole under high water pressure environment? There is also a technique in which the packing can always be pressed against the water stop valve seat with a constant pressing force without being influenced by the water pressure.

[0011]

As described above, according to the water drain plug of the present invention,
When switching the valves, the piece board is pressed with a pressing force according to the water pressure, and the drain groove is opened and closed with the packing integrated with the piece board being crimped to the water stop valve seat. Never occurs.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a water passing state of a water drain plug a according to the present invention.

FIG. 2 is a vertical cross-sectional view of the above water drain plug a in a state in which a communication hole 7 and a drain groove 18 are closed.

FIG. 3 is a vertical cross-sectional view of a water drain plug a in a drained state in which a communication hole 7 is closed and a drain groove 18 is opened.

[Explanation of symbols]

 1 Stopper Box 2 Stopper 3 Spindle 4 Piston 5 Expansion Part 6 O-ring 7 Communication Hole 8 Piece Board 9 Cap Nut 10 Inner Bottom Seat 11 Water Chamber 12 Coupling Protrusion 13 Water Guide Hole 15 Packing 16 Washer 17 Drainage Hole 18 Drainage Groove 19 Packing 20 spring 21 water inlet 22 water stop valve seat 23 water outlet S gap a water drain plug

Claims (1)

(57) [Scope of utility model registration request] 1. A cap nut having a piece board that sits on a water stop valve seat having a required insertion hole is provided at the lower end of a spindle that is inserted into a water faucet base, and an inner bottom seat of the piece board and a lower end surface of the spindle are provided. In a cold-preventing water faucet that is loosely fitted up and down via a required water chamber formed between and is a retaining plug, the piece board is watertightly fitted to a spindle, and the piece board is was formed through the water guide holes in the middle, the water chamber of the spindle
From the stroke of the lower end , loosely fit into the spindle and drain
A short stroke between the packing that opens and closes the drain and the drain
In addition, the pressure receiving area of the inner bottom seat is made larger than the area of the communication hole of the water shutoff valve seat, and the pressure of the primary water supply pressure that guides water to the inner bottom seat causes intermediate drainage under any water pressure environment. A water tap that is characterized by the absence of.