JP2003148652A - Suction valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction valve to be used to facilitate water exhaustion by sucking in the air automatically to a pipe when water is bled using a water bleeding cock for preventing freezing. SOLUTION: An auxiliary valve 13 or an auxiliary valve storing chamber moves in the case a water is leaked at a main valve 5 to enable confirming eventual failure externally from the change in the shape thereof, or a color varying material discolouring when touching water is used, and failure confirmation is made practicable external from the change of the color. Another method is such that if a water leak has occurred at the main valve, the auxiliary valve holding material deforms to move the auxiliary valve forcedly so that the water leaking is shut off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when tapping water in a cold district using a water drain plug to prevent freezing, automatically sucks air into the pipe to facilitate drainage. The intake valve is often used for the purpose.

[0002]

2. Description of the Related Art Generally, most intake valves have a main valve and a sub-valve, and are designed under the concept of stopping the water with the sub-valve when water leaks from the main valve. However, in reality, the pressure is low, as when it is attached to the hot water supply pipe,
The pressure may decrease further when hot water is supplied, and sometimes the pressure may become negative, and the sub-valve repeats opening and closing together with the main valve, resulting in an unstable state, and water leakage from the main valve immediately leads to water leakage in the sub-valve. There were things.

Even in a normal state, when a small amount of water leaks from the main valve due to dust clogging in the pipe, etc., the sub-valve is a weak spring in order to minimize residual water in the pipe. Since a floating valve that is pressed against the valve seat or comes into close contact with the valve seat only when the water level rises is used, unlike the main valve that is pressed against the valve seat with a constant pressure, it reliably stops a small amount of water leakage. It was quite difficult to do.

[0004]

Therefore, for example, when a small amount of water leaks from the auxiliary valve of the intake valve installed on the second floor, the water unknowingly travels through the pipes to the ceiling and the like on the first floor. Occasionally, it would accumulate and cause serious damage.

In view of the above points, an object of the present invention is to provide an intake valve capable of minimizing damage even if water leaks.

[0006]

In order to solve the above problems, in the intake valve according to the present invention, when water leaks from the main valve, the auxiliary valve or the auxiliary valve accommodating chamber moves to change its shape, or
It uses a color-changing material that changes color when it comes into contact with water, and it is possible to confirm abnormalities from the outside by the change in color.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an intake valve 1 according to the present invention.
An example will be shown. A valve box 1 has a male screw 2 connected to a pipe at a lower end thereof, and a main valve 5 pressed by a weak main valve spring 4 seated on a clip 3 is housed therein. The valve packing 6 is in close contact with the main valve seat 7 to stop water.

A strong auxiliary valve spring 8 is arranged on the upper downstream side of the main valve 5 (the direction in which water leaks is the downstream side; the same applies hereinafter), and is locked to a stopper 10 via a spring retainer 9. A strong pressing force is applied to the holding material 11. The stopper 10 is fixed by the upper and lower valve boxes 1 and has several vertical holes 12 formed on its side.

A sub-valve 13 is seated on the holding member 11, and is raised to cause the sub-valve packing 14 to move to the sub-cylinder 1 of the valve box 1.
The water is stopped in close contact with the valve 5, and further rises to come into contact with the auxiliary valve seat 16 and stop, thereby further ensuring the water stop. 17
Is the inlet.

The holding member 11 has a mechanical strength that can withstand a strong pressing force of the auxiliary valve spring 8 in a normal state, and loses its mechanical strength in a relatively short time when immersed in water.
Although a strong auxiliary valve spring 8 is used so that the auxiliary valve 13 can be raised, the auxiliary valve spring 8 does not necessarily have to raise the auxiliary valve 13 to the maximum. After the water has come into close contact with the main valve 5 to stop the water, the water pressure leaked from the main valve 5 may be used to raise the maximum.

As the holding material 11, for example, a powdery base material (alumina, silica, etc.) and a water-soluble binder (polyvinyl alcohol, methyl cellulose, etc.) are kneaded, granulated and molded to give a certain strength. When immersed in water,
A water-soluble binder that dissolves and disintegrates,
Alternatively, it may be softened by being soaked in water and pressed by the strong lucky valve spring 8 to change its shape.
In any case, one that loses its original mechanical strength in a relatively short time by being immersed in water is used.

When the water drain plug (not shown) is operated from the state shown in the figure to bring it into the water drain state, the inside of the pipe becomes a negative pressure and the main valve 5
Compresses the main valve spring 4 and descends, the atmosphere is introduced from the intake port 17 into the pipe through the sub valve 13 and the vertical hole 12, and the water in the pipe is smoothly discharged from the drain port (not shown) of the water drain plug. Will be.

When the drainage is completed, the main valve spring 4 pushes the main valve 5 upward, the main valve packing 6 comes into close contact with the main valve seat 7, and returns to the old position. Therefore, even when water is passed again, water does not leak from the main valve 5, but when water leaks from the main valve 5 for some reason, the water level rises, the holding material 11 is submerged in water, and the machine gradually increases. Since the secondary valve 13 loses its physical strength and collapses or deforms, the secondary valve 13 is pushed up by the strong secondary valve spring 8 and rises, and the secondary valve packing 14 comes into close contact with the secondary cylinder 15 to block water leakage.

After that, the sub-valve 13 is further raised by receiving the force of the spring, the water pressure, or both, and the sub-valve packing 14 contacts the sub-valve seat 16 and stops. That is, since the tip portion of the sub-valve 13 projects outward for the distance from the start of rising to the stop, it is possible for the user to visually recognize the change in the shape and to notify the abnormality.

At this time, for example, the sub-valve 13 is made of a red resin which shows a dangerous color so as to have a color which is easily noticeable, which is different from other portions, or a fluorescent paint is applied to emit light in a dark place. By doing so, or by applying a fluorescent paint after applying a color that is easily noticeable, there is an advantage that the person in the house can be discovered more quickly or more easily. The above function can be similarly applied to the following embodiments.

This means that the auxiliary valve 13 can prevent water leakage to the outside, but since it is not possible to intake air, the water in the pipe will not escape even if the water drain plug is operated to drain water.
This is important because it is necessary to let the user notice the abnormality as soon as possible and ask a construction company to repair or replace it, in order to prevent a situation in which the original function of the intake valve cannot be exerted, which leads to a freezing accident. That's right.

In the embodiment of FIG. 2, the main valve 5 is the same as that of FIG. 1, but the auxiliary valve 13 is positioned in the direction perpendicular to the downstream side of the main valve 5 and the strong auxiliary valve spring 8 is provided. Being pressed,
It is in contact with the cylindrical holding member 11.

An auxiliary valve seat 1 is formed by forming an annular protrusion 18 on the auxiliary valve 13, an end annular protrusion 20 on a water blocking cap 19 on which the auxiliary valve 13 slides, and attaching an annular flat packing to the valve box 1.
Both of the protrusions 18 and 20 are brought into contact with 6 to stop water. Reference numeral 21 denotes a resin waterproof clip whose tip is cut off, and 22 denotes an inner annular packing mounted on the valve box 1.

When water leaks from the main valve 5, the holding material 1
1 loses mechanical strength, the sub-valve 13 is pressed by the strong sub-valve spring 8 and gradually moves to the left, and finally the annular protrusion 18 comes into close contact with the sub-valve seat 16, Shut off leaks. If water leakage still does not stop, the water blocking clip 21 is pulled out, the water blocking cap 19 is manually rotated, and the tip annular projection 20 is brought into close contact with the sub valve seat 16 so that water can be stopped. .

In this embodiment, unlike FIG. 1,
The tip of the auxiliary valve 13 projects outward by the thickness of the holding member 11, and the strong auxiliary valve spring 8 must push the auxiliary valve 13 against the auxiliary valve seat 16 to the end.

Although not shown, in the embodiment shown in FIGS. 1 and 2, a chamber made of a transparent resin such as acrylic is provided on the downstream side of the sub valve 13 of the valve box 1 in which a discoloration that changes the color by touching water. When the material is stored and water leaks from the main valve 5, the support material 11
Discolors due to water leakage until it loses its mechanical strength and is stopped.
By maintaining this state, it is possible to confirm the abnormality from the outside. In that case, the auxiliary valve 13
Does not have to be projected outside.

FIG. 3 and the following figures show an embodiment in which a commercially available check valve cartridge 23 is housed in the main valve portion so as not to move by the clips 3 and 3 ', and when the main valve fails, the whole cartridge can be replaced. ing.

In FIG. 3, the check valve cartridge 23
Is basically composed of the main body portion 24, the main valve 5, and the weak main valve spring 4, and is attached to the main valve 5 by the main valve packing 6
However, the main valve spring 4 presses the valve seat 7 of the main body 24 so as to stop the water. There are several ventilation holes 25 at the lower end.

A sub valve 13 is arranged on the downstream side of the main valve 5, and a sub valve accommodating chamber 26 for accommodating the sub valve 13 has a water stop cap 19 at the upper end and a water stop O-ring 27 at the lower end. The sub cylinder 15 is formed between the upper intake lateral hole 28 and the lower intake lateral hole 29. Strong auxiliary valve spring 8 locked to the water stop cap 19
The holding member 11 supports the sub valve 13 pressed by the lower side. The sub valve accommodating chamber 26 is configured to slide inside the valve box 1 via the inner annular packing 22, and the flange 30 determines the highest position.

At the time of draining water, the main valve 5 descends due to negative pressure. Therefore, from the gap between the valve box 1 and the water blocking cap 19, through the upper intake lateral hole 28, the lower intake lateral hole 29, and the vent hole 25, the atmosphere is released. Is introduced into the pipe.

When water leaks from the main valve 5, the holding material 1
1 loses mechanical strength, the auxiliary valve 13 pressed by the strong auxiliary valve spring 8 descends, and the auxiliary valve packing 14 moves the auxiliary cylinder 1
5 is in close contact with the valve 5 to block water leakage, and the auxiliary valve accommodating chamber 26
Rises due to water pressure, and the collar portion 30 makes the R portion 31 on the inner surface of the valve box 1
Abut and stop. At this time, the water stop O-ring 27
Adheres to the R portion 31 and completely blocks water leakage.

Since there is a gap between the valve box 1 and the water blocking cap 19 by the amount of the rise of the sub valve accommodating chamber 26, it is easy to recognize if the exposed portion of the sub valve accommodating chamber 26 is colored as described above. become. If the water leakage does not stop for some reason, the water leakage can be shut off by grasping the water shut-off cap 19 and lifting the sub valve accommodating chamber 26.

In the embodiment shown in FIG. 4, a polygonal detent portion 32 is formed at the upper end of the inside of the valve box 1, and the auxiliary valve accommodating chamber 26 is formed.
O-ring for water stop 2
The sub valve accommodating chamber 26 equipped with 7 is moved up and down without rotating inside the valve box 1.

The auxiliary valve accommodating chamber 26 has a water stop clip 2 at the upper end.
Water stop cap 19 is connected via 1
A plate packing is installed in the inside 9 to form the sub valve seat 16.
In addition, an annular holding member 11 is provided inside by a strong auxiliary valve spring 8.
The sub-valve 13 that is pressed by the
I'm trying to seal with.

An annular protrusion 18 is formed at the tip of the sub valve 13,
A tip annular projection 20 is formed at the upper end of the sub valve accommodating chamber 26. Reference numeral 33 is a water guide hole that is drilled so that sufficient water can reach the holding material 11.

When water leaks from the main valve 5, the holding material 1
1 loses mechanical strength, is pressed by the strong auxiliary valve spring 8 to raise the auxiliary valve 13, and the annular projection 18 is moved to the auxiliary valve seat 1.
6, the water leakage is cut off, but at the same time, the sub-valve housing chamber 26 also rises due to the water pressure, and the flange portion 30 of the water blocking O-ring 27 comes into contact with the lower end of the rotation stopping portion 32 of the valve box 1 and stops. I am trying to do it.

If the water leakage does not stop, if the water blocking clip 21 is pulled out and the water blocking cap 19 is tightened, the sub valve accommodating chamber 26 will not rotate due to the detent portion 32, and therefore the sub valve accommodating chamber 26 will not rotate. The tip annular projection 20 of the chamber 26 comes into close contact with the auxiliary valve seat 16 to reliably stop the water. In addition, in the present embodiment, when the sub valve 26 rises, the water blocking clip 21 may be dropped to call the attention of the person in the house.

5 and 6, instead of using a retaining material 11 which loses its mechanical strength when immersed in water, it increases its volume significantly when immersed in water and at least moves the auxiliary valve. Shows an example using an expansive material that generates the force of the above. As the expansive material, a highly water-absorbent resin that takes in water between molecular chains is used in the form of fine particles, but of course it is not related to it. Absent.

In FIG. 5, the expander 35 is housed in the cylinder 34 of the valve housing 1 divided into two parts, and the auxiliary valve 13 is arranged thereon. The outer ring packing 36 and the inner ring packing 22 are attached to the valve box 1 with a dimensional difference that allows the auxiliary valve 13 to pass therethrough and block water leakage.

A transparent resin cap 37 is attached to the upper end of the valve box 1, and the above-mentioned color changing material 38 is housed therein.
The discoloration can be confirmed from the outside, and water and dust are prevented from easily entering the valve box 1.

When water leaks from the main valve 5, the expansion material 3
When 5 comes into contact with water to significantly increase the volume and raise the sub-valve 13, and after its tip portion comes into contact with the outer annular packing 36 and the inner annular packing 22, a frictional force is exerted, so that the sub-valve 13 is caused by water pressure. Raises further to ensure water stoppage. At that time, the color changing material 38 gets wet with water to change its color, and the change in the color can be confirmed from the outside through the transparent resin cap 37.

In the embodiment of FIG. 6, as in the case of FIG. 2, the sub-valve 13 is installed laterally in the valve box 1 and a deep groove 39 is bored in the water blocking cap 19 in which an expansion material is placed. 35
Is stored.

The sub-valve 13 has a small-diameter guide portion 40 on the right side.
When a large-diameter annular projection 18 is formed in the middle portion and water leaks from the main valve 5, the sub-valve 13 moves to the left due to an increase in the volume of the expansion material 35, and the sub-valve seat made of an annular packing. 16
The annular projection 18 is brought into contact with, and water pressure is applied to block water leakage. Since the auxiliary valve 13 in FIGS. 5 and 6 is made as light as possible, it is desirable to mold it with resin. The other operation modes are almost the same as those in FIG.

The embodiment of FIG. 7 does not use the holding material 11 and the expansion material 35 described in the embodiments of FIGS. 1 to 6, but the purpose is to inform that the main valve 5 has an abnormality and water leakage has occurred. It was proposed and at that time, the weak auxiliary valve spring 41
Ball-shaped auxiliary valve 13 pressed against the ring-shaped auxiliary valve seat 16
The sub-valve accommodating chamber 27 that accommodates the water is raised by the water pressure in FIG.
It is similar to the embodiment of.

When the sub-valve 13 is a floating valve, it does not contact the sub-valve seat 16 in a vertically oriented state, and when water leaks from the main valve 5 and the water level rises, the sub-valve seat 16 comes into close contact with the sub-valve seat 16 for the first time. Since the weight of the auxiliary valve 13 is reduced when the auxiliary valve 13 is connected in the direction, the auxiliary valve seat 16 may be closed by the weak auxiliary valve spring 41. Further, although not shown, it is also possible to adopt a method in which the design of FIGS. 1 and 2 is modified so that the sub-valve pressed by the weak sub-valve spring projects from the valve box by water pressure.

5 to 7 does not use a strong auxiliary valve spring as compared with the embodiment of FIGS. 1 to 4, the sealing property of the auxiliary valve is inferior, but the holding material has a mechanical strength. It is advantageous in that it can shorten the time until the loss of water and promptly notify that a water leak has occurred. In the above-described embodiment, the sub-valve or the sub-valve accommodating chamber is configured to project from the valve box when water leaks, but conversely, the projecting one may be partially or completely invisible in the valve box. It is possible.

[0042]

As described above, in the present invention, it is possible to reliably shut off the leakage of water from the main valve with the auxiliary valve, and further, the leakage of water from the main valve and the function as an intake valve are achieved. Since it can be confirmed from the outside by changing the shape or color of the intake valve itself, it has a great effect on reducing water leakage accidents. It has the effect of preventing the accident in which the water in the pipe freezes without inhaling.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an intake valve of the present invention using a holding material.

FIG. 2 is a vertical cross-sectional view showing another embodiment of the intake valve of the present invention using a holding material.

FIG. 3 is a vertical cross-sectional view showing another embodiment of the intake valve of the present invention using a holding material.

FIG. 4 is a longitudinal sectional view showing another embodiment of the intake valve of the present invention using a holding material.

FIG. 5 is a vertical cross-sectional view showing an embodiment of an intake valve of the present invention using an expansive material.

FIG. 6 is a vertical cross-sectional view showing another embodiment of the intake valve of the present invention using an expanding agent.

FIG. 7 is a longitudinal sectional view showing an embodiment of the intake valve of the present invention, which does not use a holding material and an expanding material.

[Explanation of symbols]

1 valve box 5 Main valve 8 Strong auxiliary valve spring 11 Holding material 13 Sub valve 26 Sub-valve chamber 35 Expansion material 38 Color change material

Continued front page    F term (reference) 3H055 AA05 AA22 BA12 BC01 CC03                       GG08                 3H065 AA01 BA01 BA06 BB01 BC04                       BC06 BC11

Claims (4)

[Claims] 1. A valve box, a main valve, and a sub-valve located on the downstream side of the main valve. When water leaks from the main valve, the sub-valve or a sub-valve slidable with respect to the valve box. An intake valve characterized in that the valve accommodating chamber moves and changes in shape can be confirmed from the outside. 2. A valve box, a main valve, and a sub-valve located on the downstream side of the main valve, and a chamber made of transparent resin is provided on the downstream side of the sub-valve. An intake valve that contains a color-changing material that changes color when touched, and that allows the color change to be confirmed from the outside when water leaks from the main valve. 3. A holding member having a mechanical strength sufficient to hold a strong auxiliary valve spring in a fixed position, and when water leaks from the main valve, the holding member is immersed in water to mechanically operate. The intake valve according to claim 1 or 2, wherein the auxiliary valve spring loses its strength and the strong auxiliary valve spring moves the auxiliary valve to forcibly shut off water leakage to the outside. 4. Absorbing water to remarkably increase the volume,
At this time, the intake valve according to claim 1 or 2, further comprising an expansion material that generates a load for moving the sub valve.