JPH1019149A - Emergency shut-off valve with intake - Google Patents

Abstract

(57) [Summary] [Problem] It is possible not only to provide a function to stop water in an emergency, but also to omit water supply equipment, which was required after water stoppage, to take in water, and to achieve a small flow rate after water stoppage. To allow the water to flow down. SOLUTION: An upstream position P of a valve body 3 in a valve box 3 is provided.
1, a water inlet 8A having a diameter d smaller than the diameter D of the valve box, which is normally closed by the lid 9 so as to be openable, is provided.
Through the downstream position P2 of the valve body 5 and is normally closed by the lid 9 so as to be openable, and the diameter d is smaller than the diameter D of the valve box.
In addition to providing the water intake 8B, after the emergency shutoff, the water intake 8A is opened to take water, and the water intake 8A and the water intake 8B are communicated with each other by the bypass pipe 11,
A small flow of water is allowed to flow down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water distribution main pipe connected to a distribution reservoir, for example, when an abnormal situation such as breakage of a water distribution main pipe occurs, the valve is closed immediately to stop water and breakage. Prevents a large amount of water leakage from the location where the abnormal situation occurs, secures the reservoir water storage, facilitates the work of taking out the reservoir water after the valve is closed as drinking water, and the downstream side after the valve is closed. The present invention relates to an emergency shutoff valve with an intake port, which allows a small flow of water to flow down a water distribution main pipe.

[0002]

2. Description of the Related Art Conventionally, a water distribution main pipe 2 is connected to a distribution reservoir 1 installed at a high place as shown in FIG. Water distribution equipment provided with a valve V is known. As shown in FIG. 6, the self-powered emergency shutoff valve V includes a valve box 3 and a valve element (butterfly valve) 5 that is openably and closably incorporated into the valve box 3 via a valve rod 4. When the flow velocity of the passing water flow in the valve box 3 reaches the set value in the valve open state of 5, the flow velocity detection mechanism 6 detects this flow velocity, and the valve 3 is quickly closed by the emergency shutoff mechanism 7. Is configured.

[0003] The flow velocity detecting mechanism 6 generally comprises a flow sensor 6.
A, a sensor lever 6B, a balance weight 6C, and a sensor weight 6D.
Generally comprises a disengaging mechanism 7A, a rotating mechanism 7B, a torque generating source 7C, a toggle link mechanism 7D, a tumbling mechanism 7E, and a hydraulic cylinder 7F.

Therefore, an abnormal situation such as breakage of the water distribution main pipe 2 occurs downstream of the location of the self-powered emergency shutoff valve V in the water distribution main pipe 2 shown in FIG.
When the flow rate of the passing water flow W in the valve box 3 shown in FIG. 4 becomes equal to or greater than the set value, the flow sensor 6A and the sensor lever 6B rotate rightward upward, pulling up the engagement / disengagement mechanism 7A, and rotate the rotation mechanism 7B.
, The tumbling mechanism 7D is turned to the lower left, the striker 7e of the tumbling mechanism 7E is turned to the right, and the toggle link mechanism 7D is pushed up. R), the valve body 5 is closed via the valve rod 4 to stop water. Thereby, it is possible to prevent a large amount of water stored in the reservoir 1 from flowing out from the damaged portion, and to secure the water stored in the reservoir 1.

[0005] However, the conventional self-operated emergency shut-off valve V
Then, when the water stored in the reservoir 1 in FIG. 5 is taken out as drinking water after the valve body 5 is closed, the water supply equipment must be separately provided in the reservoir 1. In addition, even if there is a request to make the minimum domestic water flow down the downstream area of the self-powered emergency shut-off valve V after the water stoppage, the large-diameter self-powered emergency shut-off valve V having a large diameter of the valve box 3 does not have a valve. Since a large amount of water flows down just by opening the body 5 a little, there is a drawback that it is difficult to flow down a small flow of water required as minimum living water.

[0006]

That is, the conventional emergency shut-off valve has a function of only stopping water in an emergency, and has a drawback that a water supply facility must be separately provided after the water is stopped. Later, for example, it has a disadvantage that it is difficult to flow down a small flow of water required as the minimum domestic water.

Therefore, the present invention not only has the function of stopping water in an emergency, but also can omit water by separately installing a water supply facility required after the water stoppage, and can take a small flow rate after the water stoppage. It is an object of the present invention to provide an emergency shutoff valve with an intake port that allows water to flow down easily.

[0008]

In order to achieve the above object, the present invention comprises a valve body and a valve body which is openably and closably incorporated in the valve body via a valve rod. When the flow rate of the passing water flow in the valve box becomes equal to or higher than a set value in the valve open state, the emergency shutoff valve that closes the valve element through an upstream position of the valve element in the valve box always passes through. Is closed by a lid so as to be openable, and is provided with an intake port having a diameter smaller than the diameter of the valve box, and penetrates a downstream position of the valve body in the valve box, and is always opened by the lid. It is characterized in that an intake port which is closed as much as possible and has a diameter smaller than the diameter of the valve box is provided.

According to the present invention, when an abnormal situation such as breakage occurs in the downstream water distribution main pipe and the flow rate of the passing water flow in the valve box becomes equal to or higher than the set value, the valve body is closed by emergency. Stops water and prevents large quantities of water from flowing out of the damaged area,
Water storage can be secured. On the other hand, after water shutoff with the valve closed, the lid closing the small-diameter intake at the upstream position of the valve is removed, thereby utilizing the small-diameter intake at the upstream position to store water. Can be taken out as drinking water. Further, after water stoppage, the lid closing the small-diameter intake at the upstream position of the valve body and the lid closing the small-diameter intake at the downstream position of the valve are removed, and both intakes are removed. Is connected by a bypass pipe, it is possible to flow down a small flow of water required as minimum living water in the downstream area of the self-powered emergency shutoff valve.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing an embodiment of a self-powered emergency shutoff valve to which the present invention is applied, and FIG. 2 is a partially enlarged longitudinal sectional view taken along line AA of FIG. The configuration and operation of the self-powered emergency shut-off valve, such as the flow rate detection mechanism and the emergency shut-off mechanism, are not different from those of the conventional example, so that illustration and description thereof are omitted, and other parts are the same as or equivalent to the conventional example. Parts will be described with the same reference numerals. 1 and 2, the self-powered emergency shutoff valve V includes a valve box 3 and a valve body (butterfly valve) 5 which is openably and closably incorporated into the valve box 4 via a valve rod 4. When the flow rate of the passing water flow in the valve box 3 becomes equal to or higher than the set value while the valve body 5 is open, the flow rate is detected by the flow rate detection mechanism 6 (see FIG. 6), and the emergency shut-off mechanism 7 (see FIG. 6) is activated. The valve element 5 is actuated to close the emergency valve.

The self-powered emergency shutoff valve V is provided near the reservoir 1 in the distribution main pipe 2 connected to the reservoir 1 installed at a high place as shown in FIG. And
As shown in FIGS. 1 and 2, the valve body 3 penetrates both the upstream position P1 and the downstream position P2 of the valve element 5 in the valve box 3, and the upstream position P1 has a diameter d smaller than the diameter D of the valve box 3. The intake port 8A having a smaller diameter d than the diameter D of the valve box 3 is provided at the downstream position P2. The intake ports 8A and 8B are closed by the lid 9 so as to be openable. ing.

With such a configuration, in normal times, the valve body 5 is opened, and the water stored in the reservoir 1 (see FIG. 5) flows down to the water distribution main pipe 2 downstream of the self-powered emergency shutoff valve V. Then, water distribution to the downstream area is performed. On the other hand, when an abnormal situation such as breakage occurs in the water distribution main pipe 2 downstream of the self-powered emergency shutoff valve V and the flow rate of the passing water flow W in the valve box 3 exceeds a set value, the flow rate detection mechanism is used. 6 (see FIG. 6), and the emergency shutoff mechanism 7 (see FIG. 6) closes the valve body 5 by urgently closing the valve to stop the water supply. In this way, the water in the reservoir 1 can be secured.

On the other hand, after the water is stopped when the valve body 5 is closed,
The lid 9 closing the small-diameter water intake 8A at the upstream position P1 of the valve body 5 is removed, and a water intake pipe 10 is connected thereto as shown in FIG. The water stored in the reservoir 1 can be taken out of the water pipe 10 as drinking water without separately installing a water supply facility. After the water stoppage, the lid 9 closing the small-diameter intake port 8A at the upstream position P1 of the valve body 5 and the downstream position P of the valve body 5 are closed.
After removing the lid 9 closing the small-diameter intake port 8B of FIG. 2, each of the intake ports 8A and 8B is connected by the bypass pipe 11 as shown in FIG. A small flow rate of water required as minimum living water can flow down the water distribution main pipe 2 on the downstream side.

As described above, the self-powered emergency shutoff valve V according to the present invention not only has a function of stopping water in an emergency, but also eliminates the separate installation of a water supply facility required after the water is stopped. Then, by utilizing the small-diameter water intake port 8A provided at the upstream position P1 of the valve element 5, water can be taken, and the small-diameter water intake port 8 at the upstream position P1 of the valve element 5 can be taken.
A and the small-diameter water intake port 8B at the downstream position P2 of the valve body 5,
By connecting by the bypass pipe 11 and making them communicate with each other, a small flow rate of water required as minimum living water can easily flow down to the water distribution main pipe 2 downstream of the self-powered emergency cutoff valve V.

In the above embodiment, the self-powered emergency shutoff valve V is used as the emergency shutoff valve.
It is needless to say that the application of the present invention is not limited to the self-powered emergency shutoff valve V, but can also be applied to a signal type emergency shutoff valve V (not shown) that operates by a conventionally known electric signal. Nor.

[0016]

As described above, the present invention not only has a function of stopping water in an emergency, but also has a small diameter upstream of the valve element after the valve element is closed. By removing the lid that blocks the water intake, it is possible to use the small-diameter intake at the upstream position of the valve body to save the water as drinking water without having to separately install the water supply equipment that was conventionally required. Can be taken out. After stopping water, the lid closing the small-diameter intake port at the upstream position of the valve body and the lid closing the small-diameter intake port at the downstream position of the valve body are removed. By making the intake port communicate with the bypass pipe, a small flow of water required as minimum living water can easily flow down the downstream area of the self-powered emergency shutoff valve.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of a self-powered emergency shutoff valve to which the present invention is applied.

FIG. 2 is a partially enlarged longitudinal sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram showing an example of a drinking water intake state from an upstream intake port.

FIG. 4 is an explanatory diagram showing a state in which a small flow rate of domestic water flows down the emergency shut-off valve.

FIG. 5 is a system diagram showing an example of installation of an emergency shutoff valve.

FIG. 6 is a perspective view showing a conventional self-powered emergency shutoff valve.

[Explanation of symbols]

 Reference Signs List 3 valve box 4 valve stem 5 valve body 8A upstream intake port 8B downstream intake port 9 lid D valve box diameter d intake port diameter P1 upstream position of valve body P2 downstream position of valve body

Claims (1)

[Claims] 1. A valve body, comprising: a valve body which is openably and closably incorporated into the valve box via a valve rod, wherein a flow rate of a passing water flow in the valve box is set when the valve body is open. When the value is equal to or greater than the value, in the emergency shutoff valve that closes the valve element urgently, it penetrates the upstream position of the valve element in the valve box, is normally closed by a lid so as to be openable, and has a diameter of the valve box. A water inlet having a diameter smaller than that of the valve body is provided, penetrates a downstream position of the valve body in the valve box, is normally closed by a lid so as to be openable, and has a smaller diameter than the diameter of the valve box. An emergency shutoff valve with a water intake, characterized by having an inlet.