JP3154103B2 - Antifreeze faucet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifreeze water faucet for preventing freezing of an above-ground water pipe in a cold region.

[0002]

2. Description of the Related Art Conventionally, as an antifreeze water faucet for preventing the above-mentioned water pipe from freezing, an antifreeze water faucet disclosed in Japanese Patent No. 2772467 is known.

[0003] The antifreeze faucet column includes a faucet column main body, a water pipe connection provided at a lower portion of the faucet column main body, and a faucet connection provided at an upper portion of the faucet column main body. A switching valve unit that switches to a water supply position, a water stop position, or a drain position by being disposed inside the faucet pillar main unit, and an operation unit that switches the switching valve unit. By operating the switch valve to switch the switching valve to the water supply position, the water supply state is established, and the tap water flowing in from the water pipe connection can be supplied from the faucet via the switching valve, the faucet pillar body, and the faucet connection. In addition, at the time of drainage, the switching valve is switched to the draining position to be in a draining state, the tap water flowing from the water pipe connection is stopped at the switching valve, and remains between the switching valve and the faucet connection. Tap water is discharged (drained) to the outside through the switching valve

[0004]

In this type of antifreeze tap, it is necessary to stop the water supply and then drain the water. Then, it is switched to the water draining position via the water stop position. For this reason, if the intention to switch to the water draining position is left in the water stop position due to an operation error, or if the user intentionally sets the water stop position and forgets to return to the water supply position, the switching valve is used. There is a risk that tap water will remain between the tap and the faucet connection and freeze. As a result, not only the original purpose of preventing freezing cannot be achieved, but also the freezing will cause There was a problem to be solved in which excessive pressure (water pressure) was generated and caused a failure.

The present invention has been made to solve the problem existing in the prior art. Even if tap water remains between the switching valve portion and the faucet connection portion, excessive water pressure due to freezing can be obtained. It is an object of the present invention to provide an antifreeze water faucet column that can reliably prevent occurrence of the problem and can avoid failure and improve reliability.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a faucet column main body 2, a water pipe connecting portion 3 provided below the faucet column main body 2, and a water faucet column main body 2. A faucet connecting portion 4 provided at an upper portion, and a switching valve portion 5 which is disposed inside the faucet column main body 2 to switch between a water supply position Xf, a water stop position Xs, or a drainage position Xd, and a switching valve portion 5. When configuring the antifreeze water faucet column 1 having the operating portion 6 for switching the operation, the switching valve portion 5 is housed in the switching valve holder 7 and the switching valve holder 7
Is displaceably disposed inside the faucet column main body 2, and a second drainage path Rd for draining water is provided between the switching valve holder 7 and the faucet column main body 2. The water pressure on the water pipe Pw displaces to the closed position Xc abutting on the faucet pillar main body 2 to close the second drainage path Rd, and the water pressure Fs of a predetermined magnitude or more from the faucet S side is added. The protection mechanism 8 is characterized in that the protection mechanism 8 is displaced to an open position Xo that is separated from the faucet pillar main body 2 by being performed, thereby opening the second drainage path Rd.

In this case, according to a preferred embodiment, the protection mechanism section 8 has a cylindrical switching valve holder 7, which is turned inside the switching valve holder 7 by rotating the water supply position Xf and the water stop position. Xs or the movable valve body 9 that switches to the water draining position Xd and the fixed valve body 10 fixed to overlap with the movable valve body 9 are accommodated, and the operation unit 6 and the movable valve body 9 are locked in the rotation direction Dr. , And are engaged so as to be relatively displaceable in the axial direction Da. A hydraulic pressure Fs for displacing the switching valve holder 7 to the open position Xo.
Is set by the pressure receiving area Ar on the switching valve holder 7 side.

Thus, at the time of water supply, the switching valve portion 5 is switched to the water supply position Xf to be in a water supply state, and the tap water Wp flowing from the water pipe connection portion 3 is supplied with the switching valve portion 5, the faucet pillar main body portion 2, Water can be supplied from the faucet S via the faucet connection part 4, and at the time of draining, the switching valve part 5 is switched to the draining position Xd to be in a draining state, and the tap water Wp flowing from the water pipe connection part 3 is switched. The tap water Wd that is stopped at the section 5 and remains between the switching valve section 5 and the faucet connection section 4 is discharged (drained) to the outside through the switching valve section 5. On the other hand, at the water stop position Xs, the tap water Wp is
At the same time, the tap water Wd between the switching valve unit 5 and the faucet connection unit 4 remains without being discharged to the outside. At this time, the tap water W between the switching valve portion 5 and the faucet connection portion 4
Even if d freezes and an excessive water pressure is generated inside the faucet column main body 2, if the water pressure Fs reaches a predetermined value or more, the switching valve holder 7 is displaced to the open position Xo by the water pressure Fs. . As a result, the second drainage route Rd is opened, and the remaining tap water Wd is discharged (drained) to the outside through the drainage route Rd.

[0009]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, a configuration and an installation form of an antifreeze water faucet pillar 1 according to the present embodiment will be described with reference to FIGS.

As shown in FIGS. 3 and 8, the antifreeze faucet column 1 is roughly divided into a faucet column main body 2, a water pipe connecting portion 3 provided below the faucet column main body 2, A faucet connection part 4 provided on the upper part of the faucet pillar main body 2 and a switching valve part which is disposed inside the faucet pillar main body 2 to switch to a water supply position Xf, a water stop position Xs or a drain position Xd. 5 and an operation unit 6 for switching the switching valve unit 5.

The faucet pillar main body 2 has an outer cylinder 11, and a water pipe connection 3 is attached to a lower end of the outer cylinder 11. in this case,
The outer cylinder 11 has a bottom cover 11d for closing a lower end opening, and a lower portion of the water pipe connection portion 3 projects downward from the bottom cover 11d. The upper part of the water pipe connection part 3 is increased in diameter to face the inside of the outer cylinder 11, and the lower end of the cylindrical holder guide part 12 is connected to this upper end. Holder guide 12
A switching valve holder 7 having a cylindrical shape is housed inside the switching valve holder 7 so as to be vertically displaceable. Further, inside the switching valve holder 7, a water supply position Xf (FIG. 4) and a water stop position Xs ( 5) or a disc-shaped movable valve body 9 having a predetermined thickness that can be switched to the water draining position Xd (FIG. 6), and a disc-shaped fixed valve body having a predetermined thickness that overlaps the movable valve body 9. Accommodates 10
In addition, the movable valve body 9 and the fixed valve body 10 constitute the switching valve section 5. In this case, the fixed valve element 10 is fixed in the switching valve holder 7, and the movable valve element 9 is allowed to rotate only. Reference numerals 13, 14, 15, and 16 indicate O-ring packings.

The switching valve holder 7 and the holder guide 1
A second drain path Rd for draining water is provided between the two.
In this case, a gap existing between the switching valve holder 7 and the upper portion of the holder guide portion 12 serves as a drainage path Rd. This allows
As shown in FIG. 1, the switching valve holder 7 is in the upper closed position Xc.
To the O-ring packing 13 and the holder guide 1
2, the drainage route Rd is closed,
As shown in FIG. 2, when the O-ring packing 13 is displaced to the lower open position Xo and the O-ring packing 13 is separated from the holder guide section 12, the protection mechanism section 8 in which the drainage path Rd is opened is configured.

Further, at the center of the main body 2 of the faucet, a rod portion 17 constituting the operation portion 6 is arranged. This rod part 17
Penetrates the center of the switching valve holder 7 and the fixed valve body 10, and the lower end engages with the movable valve body 9. In this case, the rod portion 17 is rotatably inserted into the switching valve holder 7 and the fixed valve body 10, and the lower end is inserted into a D-shaped hole 9h formed at the center of the movable valve body 9 by D-cut. Thereby, the rod portion 17
The (operation unit 6) and the movable valve body 9 are engaged with each other in the rotation direction Dr and engage with each other so as to be relatively displaceable in the axial direction Da. Also,
The rod portion 17 has a telescopic coupling portion 17c provided with a spring in the middle portion, and has an upper end protruding upward from a top cover 11u that closes an upper end opening of the outer cylinder 11, and a handle portion 18 is attached to an end portion.

On the other hand, the lower end of the inner cylinder 19 is connected to the upper end of the holder guide 12. The inner cylinder 19 serves as a water channel that covers the lower part of the rod part 17, and a faucet connection unit 20 is coupled to the upper end. The faucet connection unit 20 has a vertical pipe part 21 and a faucet connection part 4 protruding in a horizontal direction from an intermediate part of the vertical pipe part 21, and has an L-shaped water passage therein. The faucet connection part 4 is exposed from the front surface of the outer cylinder 11, and a cylindrical cover part 22 is attached to the tip. Further, the lower end of a rod receiving portion 23 is connected to the upper end of the vertical pipe portion 21, and the upper end of the rod receiving portion 23 is connected to the upper surface cover 11u. Therefore, the rod part 17 penetrates the inside of the vertical pipe part 21 and the rod receiving part 23.

FIG. 8 shows the outer appearance of the antifreeze water tap 1. FIG. 9 shows an installation form of the antifreeze faucet column 1. FIG.
Reference numeral 30 denotes a water main buried underground, and an antifreeze faucet pillar 1 is provided in the middle of the water main Pw branched from the water main 30.
The water pipe connection part 3 is connected. As a result, the antifreeze cock column 1 stands on the ground. The faucet S is connected to the faucet connection part 4 of the antifreeze water tap 1. On the other hand, a water meter 31 is connected in the middle of the water pipe Pw located in front of the antifreeze water faucet column 1.
Reference numeral 32 denotes a water stopcock connected to the water pipe Pw on the upstream side of the water meter 31, and reference numeral 33 denotes a check valve connected to the water pipe Pw on the downstream side of the water meter 31.

Next, the operation of the antifreeze water faucet 1 according to the present embodiment will be described with reference to FIGS.

First, at the time of water supply, the switching valve unit 5
The water supply position is switched to the water supply position Xf shown in (a) and (b). Thereby, the water passage hole 9a of the movable valve body 9 and the water passage hole 10a of the fixed valve body 10 communicate with each other, and the antifreeze water cock column 1 is in a water supply state. As a result, the tap water Wp flowing from the water pipe connection portion 3
Flows in the direction of the arrow shown in FIG. 4 (b), and can be supplied from the faucet S through the faucet pillar main body portion 2 and the faucet connection portion 4.
In this case, since the water pressure Fp on the water pipe Pw side acts on the switching valve holder 7 from below, the switching valve holder 7 is moved to the upper closed position X.
c, and closes the second drainage path Rd.

At the time of draining the water, the operating portion 6 (the handle portion 18) is turned by hand to move the switching valve portion 5 to the position shown in FIG.
Switching to the draining position Xd shown in (a) and (b). As a result, the antifreeze faucet column 1 is in a drained state, and the water pipe connection portion 3
Tap water Wp flowing from the fixed valve body 1 is stopped by the movable valve body 9 as shown by an arrow shown in FIG.
The tap water Wd remaining between the switching valve portion 5 and the faucet connection portion 4 communicates with the water passage hole portion 10a, the water passage concave portion 9b of the movable valve body 9, and the water passage hole portion 10b of the fixed valve body 10. It flows in the direction of the arrow shown in FIG. 6B and is discharged (drained) to the outside. In this case, the tap water Wd discharged from the fixed valve body 10 is supplied to the drainage portion 34 provided in the holder guide portion 12, the outer cylinder 11 and the inner cylinder 19.
The water is discharged to the outside via a space between the holes and a drain port 35 provided in the bottom cover 11d.

On the other hand, the operator intends to switch the switching valve section 5 to the water draining position Xd by the operating section 6, but the operation of FIG.
(A), after being left in the water stop position Xs shown in (b), or after being consciously set to the water stop position Xs,
If the user returns to the water supply position Xf and forgets to do so, the tap water Wd between the switching valve unit 5 and the faucet connection unit 4 remains without being discharged to the outside. Therefore, the switching valve unit 5
And the tap water Wd between the tap connecting portion 4 and the tap water connecting portion 4 may be frozen,
When frozen, excessive water pressure is generated inside the faucet pillar main body 2.

However, when the water pressure Fs reaches a predetermined value or more, the switching valve holder 7 is displaced to the open position Xo by the water pressure Fs, and the second drainage path Rd is opened. As a result, the remaining tap water Wd is discharged (drained) to the outside through the drainage route Rd. The tap water Wd discharged through the drainage route Rd is supplied to the outside through a drain portion 34 provided in the holder guide portion 12, a space between the outer cylinder 11 and the inner cylinder 19, and a drain port 35 provided in the bottom cover 11d. Is discharged. In this case, the magnitude of the hydraulic pressure Fs for displacing the switching valve holder 7 to the open position Xo depends on the pressure receiving area A on the switching valve holder 7 side.
It can be set by r. Therefore, for example, when the switching valve holder 7 is displaced with a higher hydraulic pressure Fs, the O-ring packing 13 is set to have a small diameter and the pressure receiving area Ar is relatively set as shown by a virtual line in FIG. What is necessary is just to make it small. When the pressure receiving area is changed, the pressure receiving area on the lower surface on the switching valve holder 7 side may be changed.

According to the antifreeze water faucet pillar 1 according to this embodiment, the switching valve portion 5 is at the water stop position Xs, and the switching valve portion 5
Even if the tap water Wd is left in a state between the tap water connecting portion 4 and the tap water Wd, the generation of excessive water pressure due to the freezing of the tap water Wd is reliably prevented, thereby preventing the failure and improving reliability. Is improved.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment,
The detailed configuration, shape, material, etc. can be arbitrarily changed, added, or deleted without departing from the gist of the present invention. For example, the switching type of the switching valve unit 5 may be other types than those illustrated.

[0024]

As described above, in the antifreeze water faucet according to the present invention, the switching valve portion is housed in the switching valve holder, and the switching valve holder is displaceably disposed inside the water faucet column main body. In addition, a second drainage path for draining water is provided between the switching valve holder and the faucet pillar main body, and the switching valve holder is displaced to a closed position where the switching valve holder abuts on the faucet pillar main body due to water pressure on the water pipe side. To close the second drainage path, and when the water pressure of a predetermined magnitude or more is applied from the faucet side, the second drainage path is displaced to the open position away from the faucet pillar main body and the second drainage path is opened. Even if tap water remains between the switching valve unit and the faucet connection, it reliably prevents the generation of excessive water pressure due to freezing, avoiding breakdown and improving reliability. It has a remarkable effect that it can be achieved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a protection mechanism showing a state in which a switching valve holder of an antifreeze tap column according to a preferred embodiment of the present invention is displaced to a closed position;

FIG. 2 is a longitudinal sectional view of a protection mechanism showing a state in which a switching valve holder of the antifreeze water tap is displaced to an open position.

FIG. 3 is a longitudinal sectional view showing the entirety of the antifreeze faucet column;

FIG. 4 is a plan view (a) and a longitudinal sectional view (b) showing a water supply position of a switching valve part in the antifreeze water cock column.

FIGS. 5A and 5B are a plan view and a vertical cross-sectional view showing a water stop position of a switching valve section in the antifreeze water tap.

FIGS. 6A and 6B are a plan view and a vertical sectional view showing a drainage position of a switching valve portion in the antifreeze water tap column,

FIG. 7 is an explanatory diagram for setting a pressure receiving area on the switching valve holder side in the antifreeze water tap column;

FIG. 8 is an external perspective view of the antifreeze faucet pillar,

FIG. 9 is an explanatory view showing an installation form of the antifreeze faucet column;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antifreeze water tap column 2 Water tap column main part 3 Water pipe connection part 4 Faucet connection part 5 Switching valve part 6 Operation part 7 Switching valve holder 8 Protection mechanism part 9 Movable valve body 10 Fixed valve body Xf Water supply position Xs Stop water Position Xd Water drain position Xc Close position Xo Open position Rd Second drain path Pw Water pipe S Faucet Fp Water pressure Fs Water pressure Dr Rotation direction Da Axial direction Ar Pressure receiving area

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-121369 (JP, A) JP-A-63-268825 (JP, A) JP-A-8-218447 (JP, A) Patent 2772467 (JP, A) B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) E03B 9/02-9/10 E03B 7/10

Claims (1)

(57) [Claims] A water main body, a water pipe connecting part provided at a lower portion of the water main body, a faucet connecting part provided at an upper part of the water main body, and the water main body. A switching valve portion that switches to a water supply position, a water stop position, or a drain position by being disposed inside the portion, and an operating portion that switches the switching valve portion, In a switching valve holder, and disposing the switching valve holder displaceably inside the faucet column main body, and draining water between the switching valve holder and the faucet column main body. A second drainage path is provided, the switching valve holder is displaced to a closed position in contact with the faucet pillar main body by water pressure on the water pipe side to close the second drainage path, and a predetermined water flow from the faucet side. When the water pressure equal to or larger than the size of An antifreeze tap which is provided with a protection mechanism for opening the second drainage path.