JPH0320615Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water stop valve that is used as a water switch by being attached to a water pipe or a faucet, for example.

[Conventional technology and its issues]

(b) This type of water stop valve has generally been equipped with a valve consisting of a valve seat and a valve body in the middle of the internal flow path from the connection port connected to the water pipe or faucet to the water outlet. In addition to interposing a mechanism,
It is known that the valve mechanism is provided with an operating tool for opening and closing the valve mechanism.

Furthermore, the valve mechanism is usually constructed to have sufficient strength to withstand water pressure considerably greater than normal water pressure.

However, (a) depending on the region or time, such as on the lower floors of a high-rise building or at night, abnormally high water pressure that is higher than normal water pressure may occur; in such cases, the above-mentioned Because the valve mechanism has a sufficiently sturdy structure, damage or deformation may occur on the upstream side of the valve mechanism (for example, near the connection to the water pipe or faucet), and damage from the damaged or deformed part may occur. There was a problem in that inconvenient situations such as leaking water spilling out and splashing around the water stop valve and the floor outside the bathtub became soaked with water.

(b) Also, even if the water pressure is not abnormally high as mentioned above, if the stop valve is repeatedly used,
If the stop valve itself becomes fatigued beyond the allowable limit, and the internal flow path of the main body is suddenly opened and closed by the valve mechanism, a water hammer effect will occur, causing damage to the stop valve main body. etc. were easily damaged or deformed, causing the same inconvenience as mentioned above. In other words, even when the water pressure is not abnormally high, the same problem as described above may occur even when the water pressure is higher than the water pressure that the stop valve itself can withstand.

(b) The drawbacks of (a) and (b) of the above conventional example (a) are
This problem can be solved by applying the invention of a water hammer protection device for a condenser water supply piping system disclosed in Japanese Patent No. 58559.

In other words, the water hammer protection device disclosed in Japanese Patent Publication No. 57-58559 provides a bypass flow path that connects the piping system upstream and downstream of the valve in the water supply piping system to the condenser water chamber that is equipped with a valve. , a rupture disk is attached to this bypass flow path that normally closes this bypass flow path and is destroyed only when abnormal pressure increases to open the bypass flow path (hereinafter referred to as a bypass flow path type);
Alternatively, the valve body itself is provided with a flow path that communicates the upstream and downstream sides of the valve, and a rupture disk is attached to this flow path, which breaks and opens the flow path only when abnormal pressure increases (hereinafter referred to as this). (referred to as the valve body flow path type).

Therefore, when the conventional example (b) is applied to the water stop valve according to the invention of the present invention, new problems as described below arise. That is, (c) When the above-mentioned bypass flow path type of conventional example (b) is applied to a water stop valve, a bypass flow path is created separately from the flow path inside the main body that runs from the connection port for the water pipe or faucet to the water outlet. In order to install this, additional bypass piping is required, and
This has the disadvantage that it requires a large installation space, is unsightly in appearance, and has a complicated structure.

(d) When the valve body flow path type of conventional example (b) is applied to a water stop valve, it is necessary to install a press plate with a knife edge that destroys the rupture disk on the downstream side of the rupture disk, and the parts There are disadvantages such as the number of points increases and the structure becomes complex.

The present invention has a simple configuration without using the bypass flow path type or valve body flow path type as in the conventional example (b), and the above-mentioned
The aim is to provide a product that eliminates all of the drawbacks (a) to (d).

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention provides a water stop faucet in which a valve mechanism is interposed in the middle of the internal flow path of the main body from the connection port connected to the water pipe or faucet to the water outlet. The valve seat of the valve mechanism has a thin-walled breakage tolerance section that breaks when the water stop is released under a predetermined water pressure, and this breakage tolerance section surrounds the ball valve body seated on the valve seat. It is formed to have a diameter larger than that of the ball valve body.

The valve seat can also be configured to be detachable and replaceable with respect to the valve seat support.

[Effect]

When a predetermined water pressure, such as a high water pressure that is higher than the water pressure that the valve mechanism or the water stop valve itself can withstand, acts on the valve mechanism or the water stop valve itself for some reason, the valve seat of the valve mechanism itself becomes thin-walled. When the breakage-accepting part is broken, the water stop state is forcibly released, and the water that flows out due to the breakage of the valve seat is directed to the water outlet by the cylindrical guide part that forms an internal flow path and surrounds the valve mechanism. The water flows straight down from the water outlet to a predetermined location, such as a sink or bathtub, located below the water stop valve.

Therefore, as in the past, abnormally high water pressure acts on the upstream side of the valve mechanism and damages that part, or as mentioned above, the limit fatigue of the stop valve itself or water hammer action combine to prevent the valve mechanism from stopping. There is no danger of damaging the faucet itself, and therefore, with the present invention, there is no possibility of inconvenient situations such as water leaking out to the outside of the sink or bathtub and causing water to drip on the floor.

〔Example〕

A first embodiment of this invention will be described below with reference to FIGS. 1 to 4.

In the first embodiment, the present invention is applied to a lever-type water switch as an example of a water stop valve.

As shown in Fig. 1, this lever type switch is used by simply attaching it to a water faucet or the end of a water pipe J in a kitchen or washroom, for example, and as shown in Fig. 3, it is used as an operating tool. By swinging the lever 1 back and forth, it is possible to control the outflow and stop of water extremely easily and with good operability.

1 to 4, reference numeral 2 denotes a cylindrical faucet body, on the top of which a faucet receiving cap 3 having a connection port 3a connected to a faucet or water pipe J is removably screwed. Along with being worn,
A foam end member 4 having a water outlet 4a at its lower part.
is removably screwed on. In the intermediate part of the main body internal channel 5 formed inside the faucet receiving cap 3, the faucet main body 2, and the foam end member 4,
A valve seat support 6 integrally connected to the plug body 2, a valve seat 7 integrally connected and supported by the valve seat support 6, and a ball valve provided in a valve chamber 8 above the valve seat 7. A valve mechanism 10 consisting of a body 9 is interposed, and
An opening/closing operation mechanism 11 for the valve mechanism 10 is attached to the side of the stopper body 2. A cylindrical guide portion comprising the stopper main body 2, the foam end member 4, etc. and forming the main body internal flow path 5 surrounds the valve mechanism 10,
It is formed to guide water flowing out from the valve mechanism 10 to the water outlet 4a.

In addition, in the figure, 12 is a faucet receiving gasket, 13 is a holding plate for the gasket 12, 14 is a cylindrical metal fitting for tightening the gasket 12, 15 is a cylindrical member for faucet receiving, and 16... are plural pieces in the circumferential direction. Faucet fixing screws (three in this embodiment): 1
7 is a gasket for the ball valve body 9, 18 is a foam hole plate, 19 is a foam hole ring, and 20 is a foam net.

In the opening/closing operation mechanism 11 for the valve mechanism 10, 21 is a push rod for the ball valve body 9, and is always urged in the pulling direction by a spring 22. By swinging the lever 1 by about 45 degrees (up to the X position in FIG. The ball valve body 9 is forcibly pushed into the position shown by the dotted line in FIG.
Similarly, move it to the position shown by the dotted line in Figure 1,
The valve mechanism 10 is opened. Then, by pushing the lever 1 back to the opposite side to about 60 degrees (Y position in FIG. 3) from this state, the push rod 21 is released from the forced pushing action by the cam body 24 and is pulled back by the spring 22. Accordingly, the ball valve body 9 is seated on the valve seat 7 by water pressure from above,
The valve mechanism 10 is then closed.

The valve seat 7 of the valve mechanism 10 has a breakage tolerance part A formed in a thin wall that breaks when the water stop is released under a predetermined water pressure, and the breakage tolerance part A is seated on the valve seat 7. It is formed in a range that surrounds the ball valve body 9 and has a diameter larger than the diameter of the ball valve body 9. The breakage tolerance portion A in this embodiment is formed as an annular recess a on the lower surface side (or upper surface side) of the peripheral portion of the valve seat 7, as shown in FIGS. 1 and 2.
When a predetermined water pressure that is higher than the water pressure that the valve mechanism 10 or the stopcock itself (especially the stopcock body 2) can withstand is applied, the breakage tolerance portion A formed in the valve seat 7 is damaged and the stopcock is forcibly opened. In this case, the water flowing out from the damaged valve seat 7 is guided to the water outlet 4a by the cylindrical guide portion, and the water is caused to flow out from the water outlet 4a.

Here, the predetermined water pressure that is higher than the water pressure that the valve mechanism 10 or the water stop valve itself can withstand means that the valve mechanism 10 is in a closed (water-stopped) state depending on the region or time.
0 or equivalent to abnormally high water pressure acting on the stop valve itself, or even if the water pressure is not abnormally high, in addition to the limit fatigue due to repeated use of the stop valve itself, sudden opening and closing operations of the valve mechanism 10 This refers to water pressure equivalent to the high water pressure that occurs when the occurrence of the water hammer effect occurs.

5 and 6 show a second embodiment, in which the present invention is applied to a flow rate regulator as another example of a water stop valve.

This flow rate regulator is mainly used by being easily attached to a faucet for supplying water to a bathtub or hot water, or to the tip of a water pipe J, and is set by a flow rate setting dial 101 (described in detail later) as an operating tool. It is configured to automatically stop the water supply (or hot water supply) when a certain amount of water (or hot water) flows out.

5 and 6, reference numeral 102 denotes a cylindrical faucet body, on the top of which a faucet receiving cap 103 having a connection port 103a connected to a faucet or water pipe J is removably screwed. A hose joint 104 having a water outlet 104a is removably screwed onto the lower part of the hose joint 104. These faucet receiving cap 103 and faucet main body 1
02 and the hose joint 104, the plug body 102
A valve seat support 6 integrally connected to the valve seat support 6, a valve seat 7 integrally connected and supported by the valve seat support 6, and a ball valve body 9 provided in a valve chamber 8 above the valve seat 7. A valve mechanism 10 is interposed, and the valve mechanism 1
The opening/closing operation mechanism 111 for the stopper main body 102
is attached to the side of the The structure in which the cylindrical guide part, which is composed of a plug body 102, a hose joint 104, and constitutes a body internal flow path 105, surrounds the valve mechanism 10 and guides the water flowing out from the valve mechanism 10 to the water outlet 104a is the same as in the previous embodiment. It is similar to

In addition, in the figure, 112 is a faucet holder, 11
3 is a holding plate for the packing 112, 114
is a cylindrical fitting for tightening the packing 112,
115 is a cylindrical member for receiving a faucet, 116 is a faucet fixing screw provided in plurality (three in this embodiment) in the circumferential direction, and 17 is a gasket for the ball valve body 9.

In the opening/closing operation mechanism 111 for the valve mechanism 10, 101 is a dial with a scale for setting the flow rate, and 121 is a cam plate for opening/closing the ball valve body 9, when the flow rate set by the dial 101 becomes zero. When the ball valve body 9 enters the concave portion 121a of the cam plate 121 and is seated on the valve seat 7 by water pressure from above to close the valve mechanism 10 and shut off water, the dial 101 is rotated. When the set flow rate is greater than zero, the clutch shaft 122, the first clutch gear 123,
The ball valve body 9 is rotated by an angle proportional to the amount of rotation of the dial 101 via the cam gear 124, and the ball valve body 9 is pushed to the non-concave portion 121b of the cam plate 121 and forcibly moved to the position shown by the dotted line in the figure. The valve mechanism 10 is opened and water can be injected.

On the other hand, on the downstream side of the valve mechanism 10 in the main body internal flow path 105, there is an impeller 12 for detecting an outflow flow rate.
5 is provided, and its rotation is controlled by a five-speed reduction gear 126, a relay gear 127, and a second clutch gear 12.
8 to the clutch shaft 122;
Rotate the dial 101 so that the set flow rate returns to zero. Therefore, when the amount of water (or hot water) set by the dial 101 flows out, the dial 101 is returned to the initial state of the set flow rate of zero, and accordingly, the cam plate 1
21 is also returned to its initial state, and the ball valve body 9 is seated on the valve seat 7 by water pressure from above, and the valve mechanism 10
It closes the

In the structure described above, similarly to the embodiment described above, a thin breakage tolerance portion A consisting of an annular recessed portion a is formed on the lower surface side (or upper surface side) of the peripheral portion of the valve seat 7 of the valve mechanism 10. This breakage tolerance part A is formed in a range that surrounds the ball valve element 9 seated on the valve seat 7 and has a diameter larger than the diameter of the ball valve element 9. When the valve mechanism 10 is subjected to a predetermined water pressure that is higher than the water pressure that the valve mechanism or the water stop valve itself (especially the water stop valve body 102) can withstand, the damage tolerance part A is damaged and the water stop is forcibly released. state, and the water flowing out from the damaged valve seat 7 is transferred to the water outlet 104 using the cylindrical guide portion.
a, and the water is configured to flow out from this water outlet 104a.

In both of the above embodiments, the breakage tolerance part A of the valve mechanism 10 was formed as an annular recess a on the lower surface side of the valve seat 7, but as shown in FIG. You may. Further, as shown in FIG. 8, the break line b can be formed as a breakage tolerance part A on the valve seat 7.

Furthermore, instead of having the structure in which the valve seat support 6 and the valve seat 7 are integrally and continuously formed as in the first and second embodiments, as shown in FIG.
The valve seat 7 may be configured to be detachable and replaceable from the valve seat support 6, and the entire bottom plate portion of the valve seat 7 may be made thin, and this thin portion c may be used as the breakage tolerance portion A. With this configuration, if the valve seat 7 is damaged due to abnormally high water pressure exceeding a predetermined water pressure, it is only necessary to replace the valve seat 7, which makes repairs easy and economical. be.

As is well known, the valve mechanism 10 can also be adopted as one consisting of a valve seat 7 without a valve seat support 6 and a ball valve body 9.

This device can also be attached to a water purifier.

[Effect of idea]

According to this invention, (1) the valve seat of the valve mechanism is formed with a thin-walled breakage tolerance part that breaks when the water stop is released under a predetermined water pressure; When a predetermined water pressure is applied due to high water pressure or water hammer action, the breakage tolerance part of this valve seat is destroyed and the water shutoff is forcibly released.
In order to allow water to properly flow down from the water outlet to a predetermined location such as a sink or bathtub located below the water stop valve, abnormally high water pressure acts on the upstream side of the valve mechanism as in the past. As mentioned above, the limit fatigue of the stop valve itself and the water hammer action combine to prevent the stop valve itself from being damaged. It is possible to prevent an inconvenient situation such as water flowing out and scattering to the outside and causing the floor etc. to be soaked with water.

(2) Since the damage tolerance part surrounds the ball valve element seated on the valve seat and is formed in a range having a diameter larger than the diameter of the ball valve element, the damage tolerance part cannot be destroyed at any position. , the destroyed valve seat cannot be reused and the valve will never shut off water again.

[Brief explanation of drawings]

The drawings show an embodiment of the water stop valve according to the present invention, and FIG. 1 is a longitudinal sectional front view of the first embodiment, FIG. 2 is an enlarged vertical sectional view of the main part of FIG. 1, and FIG. Figure 1 is a side view, Figure 4 is a front view of Figure 1, Figure 5 is a side view of Figure 2.
FIG. 6 is a partially cutaway perspective view of the embodiment, FIG. 6 is a longitudinal sectional front view thereof, and FIGS. 7 to 9 are enlarged longitudinal sectional views of essential parts showing various modifications, respectively. 1,101... Operating tool, 3a, 103a... Connection port, 4a, 104a... Water outlet, 5,105
... Body internal flow path, 6 ... Valve seat support, 7 ... Valve seat, 9 ... Ball valve body, 10 ... Valve mechanism, A ...
Damage tolerance part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A water stop faucet in which a valve mechanism is interposed in the middle of a flow path inside the main body from a connection port connected to a water pipe or a faucet to a water outlet, wherein the valve The valve seat of the mechanism has a thin-walled breakage tolerance section that breaks when the water stop is released under a predetermined water pressure. A water stop valve characterized by being formed to have a diameter larger than the diameter of the valve body. (2) Utility model registration claim No. (1): The valve seat is configured to be detachable and replaceable from the valve seat support.
Water stop valve as described in section.