JPH07317113A - Leakage emergency shutdown device of water supply system - Google Patents

Abstract

PURPOSE:To prevent the expansion of a water leakage trouble, by detecting the leakage of the water fed by the water supply pipings provided to various places in a construction, and controlling a pressure reducing valve provided in a main piping. CONSTITUTION:When either one of leakage sensors S1 to S3 detects a leakage, a power fed to the driving coil of a solenoid valve 23 is controlled by a control device 19 depending on the detecting signal of the leakage sensors S1 to S3, and thereby, the solenoid valve 23 is operated to drive the valve body of a pressure reducing valve 21, so as to shut a main piping 1. In a house, for example, a water leakage is generated in a kitchen, a detecting signal is input to a control device 19 from a leakage sensor S2 provided under the floor of the kitchen. When the detecting signal is inputted, the control device 19 receiving the detecting signal decides that a leakage is generated, and the power feeding to the driving coil of the solenoid valve 23 is controlled. When a power is fed to the driving coil, the valve body of the pressure reducing valve 21 is shut, the main pipe 1 is cut off, and as a result, the expansion of the leakage is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage emergency shutoff device for instantaneously stopping water supply by a water supply facility and preventing the expansion of water leakage accidents when water leakage occurs in a building.

[0002]

2. Description of the Related Art Generally, buildings such as houses and buildings are provided with water supply facilities. Such a water supply facility includes a main pipe for taking water into the building from a common pipe for water supply, and a water supply pipe branched from the main pipe to supply water to a toilet, a washroom or the like in the building. A gate valve that regulates the flow rate, a pressure reducing valve that regulates the water pressure, a water meter that measures the amount of flowing water, and a flowing water flow in one direction from the upstream side to the downstream side of the water flow through the main pipe. A check valve and a water shutoff valve are sequentially provided, and a faucet or the like is attached to the tip of each water supply pipe. The gate valve is usually set to a predetermined opening, and in this state, necessary water supply is performed by opening and closing the faucet. And
Conventionally, when water leaks in a building, the gate valve is manually closed to shut off the water flow in the main pipe.

[0003]

However, in the conventional method of manually closing the gate valve in the case of water leakage, it takes time and effort to close the gate valve, and it is not possible to respond instantaneously. There was a problem that water leakage could not be blocked. Also, even if a leak occurs, if you do not notice it, you cannot reliably shut off the leak,
There was a problem that the surrounding buildings could be damaged. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a water leakage emergency for a water supply facility capable of instantaneously closing the water supply when a water leak occurs in a building and preventing the expansion of a water leakage accident. The purpose is to provide a blocking device.

[0004]

In order to achieve the above object, the present invention provides a main pipe for taking water into a building and a main pipe arranged in the building and branched from the main pipe to various places in the building. A water leakage emergency shutoff device for a water supply facility comprising a water supply pipe for supplying water, the water leakage sensor being installed at each place in the building for detecting water leakage supplied by the water supply pipe, and the main pipe. And a pressure reducing valve device having a solenoid valve and a pressure reducing valve that is driven to open and close by the solenoid valve to adjust the pressure of water flowing through the main pipe; and the solenoid valve when water leaks based on a detection signal from the water leak sensor. And a control device that controls the pressure reducing valve to close the main pipe by the pressure reducing valve.

Further, according to the present invention, the water leakage sensor is arranged under the floor of a building.

[0006]

[Function] When water leaks occur in various places in the building to which water is supplied by the water supply pipe, the occurrence of water leak is detected by the water leak sensor, and the solenoid valve is controlled by the controller based on the detection signal from the water leak sensor. Is controlled to drive the pressure reducing valve, and the pressure reducing valve closes the main pipe to shut off the flow of water in the main pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In addition, in the present embodiment, a case where a building is a house will be described as an example. FIG. 1 is a schematic plan view of a house to which the water leakage emergency shutoff device of the present invention is applied, FIG. 2 is a schematic configuration diagram showing a schematic configuration of the water leakage emergency shutoff device, and FIG. 3 is a longitudinal sectional view showing a pressure reducing valve device. As shown in FIG. 1, in a house, a main pipe 1 that takes water into the house through a common pipe (not shown) for water supply, and a water supply that supplies water to each indoor room of the house that is branched from this main pipe 1 A water supply facility including the pipe 3 is installed. The main pipe 1 is connected to an outdoor water heater 5, and the water pipe 3 is arranged from the water heater 5 to an indoor kitchen, toilet, washroom, bathroom, laundry room, etc. A faucet is attached to the tip of 3. In FIG. 1, G is a gas pipe, H1 and H2 are hot water pipes, and C1 is a water supply pipe. Further, in the main pipe 1, as shown in FIG. 2, from the upstream side to the downstream side of the flow of water, a gate valve 7 for setting a flow rate, a pressure reducing valve device 9 for adjusting the water pressure, and a flow rate are measured. Water meter 11,
A check valve 13 that allows running water to flow in one direction and a water shutoff valve 15 are sequentially provided, and the water shutoff valve 15 is installed upstream of the water heater 5 in the main pipe 1.

The water supply facility includes a water leakage emergency shutoff device 17
Is provided. Water leakage emergency shutoff device 17 of the present embodiment
Is a pressure reducing valve device 9, water leakage sensors S1 to S3 for detecting water leakage in each room of the house where the faucet is arranged, and the pressure reducing valve when water leaks based on detection signals from the water leakage sensors S1 to S3. A control device 19 for closing the main pipe 1 by a device 9 is provided. As shown in FIG. 3, the pressure reducing valve device 9 includes a pressure reducing valve 21 for water pressure adjustment and an electromagnetic valve 23 that opens and closes the pressure reducing valve 21. The rod 23a of the electromagnetic valve 23 is connected to the valve body 25 of the pressure reducing valve 21, and the valve body 25 of the pressure reducing valve 21 is opened / closed by the expansion / contraction operation of the rod 23a of the electromagnetic valve 23 to open / close the main pipe 1. It has a structure. Further, in this embodiment, when the drive coil of the solenoid valve 23 is energized, the rod 23a extends against the adjusting spring 27 and the main pipe 1 is closed. Incidentally, in FIG. 3, 2
9 is a spring protection cylinder, 31 is an adjusting screw, 33 is a diaphragm, 35 is a strainer, 37 is a valve rod, 39 is a valve seat, 41
Is a valve box, 43 is a lead wire of the solenoid valve 23, P1 is primary pressure, and P2 is secondary pressure.

As shown in FIG. 1, the water leak sensors S1 to S3 are installed under the floor of a kitchen, a toilet, a bathroom, and a washroom, respectively, and these water leak sensors S1 to S3 are installed.
Is a control device 1 installed outdoors near the water heater 5.
9 is connected. As the water leakage sensors S1 to S3, for example, conventionally known sensors such as an electric sensor having a pair of electrodes that are energized by being flooded can be used. The control device 19 is electrically connected to the drive coil of the electromagnetic valve 23 of the pressure reducing valve device 9, and when any of the water leak sensors S1 to S3 detects water leak, the water leak sensors S1 to S3 operate. Based on the detection signal, the control device 19 controls the energization of the drive coil of the solenoid valve 23, whereby the solenoid valve 23 operates to drive the valve body 25 of the pressure reducing valve 21, and the main pipe 1 is closed. Has become.

Next, the operation of the water leakage emergency shutoff device 17 having the above construction will be described. For example, in the house shown in FIG. 1, when water leaks in the kitchen, the water leak sensor S2 installed under the floor of the kitchen detects the water leak, and the detection signal from the water leak sensor S2 is input to the control device 19. It In the control device 19, when the detection signal is input, it is determined that water leakage has occurred, and energization of the drive coil of the solenoid valve 23 is controlled. In the solenoid valve 23, when the drive coil is energized, the rod 23a expands, the valve body 25 of the pressure reducing valve 21 closes, and the main pipe 1 is shut off, whereby expansion of water leakage is prevented.

Therefore, according to this embodiment, when water leakage occurs, the main pipe 1 can be automatically and instantaneously shut off to shut off the water supply to the water heater 5, thereby preventing the leakage of water. Also, unlike conventional manual work,
Since water leakage can be blocked, damage to surrounding buildings can be reliably prevented. Further, since the pressure reducing valve device 9 has a structure in which the pressure reducing valve 21 and the electromagnetic valve 23 are integrated, it is inexpensive and is suitable for use in a water supply pressurization type water supply facility.

[0012]

As described above, according to the present invention, a main pipe for taking water into a building and a main pipe arranged inside the building and branched from the main pipe to supply water to various places in the building. A water leakage emergency shutoff device for water supply equipment with a water supply pipe, and a water leakage sensor for detecting water leakage of water supplied by the water supply pipe installed at various places in the building,
A pressure reducing valve device which is interposed in the main pipe, has a pressure reducing valve that is opened and closed by an electromagnetic valve and is driven to open and close by the electromagnetic valve, and adjusts the pressure of water flowing through the main pipe, and when water leaks based on a detection signal from the water leak sensor. Since it is configured to include a control device that controls the solenoid valve and closes the main pipe by the pressure reducing valve, when water leakage occurs in the building, the water supply is instantly closed to prevent the expansion of the water leakage accident. be able to.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a house to which a water leakage emergency shutoff device is applied according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a schematic configuration of a water leakage emergency shutoff device.

FIG. 3 is a vertical cross-sectional view showing a pressure reducing valve device.

[Explanation of symbols]

 1 Main Pipe 3 Water Supply Pipe 9 Pressure Reduction Valve Device 17 Water Leakage Emergency Shutoff Device 19 Control Device 21 Pressure Reduction Valve 23 Electromagnetic Valve S1 to S3 Water Leakage Sensor

Claims (2)

[Claims] 1. A water supply facility comprising: a main pipe for taking water into a building; and a water supply pipe which is arranged in the building and is branched from the main pipe to supply water to various places in the building. A water leakage emergency shutoff device, which is installed in each place in the building and detects a water leak supplied by the water supply pipe, and a water leakage sensor installed in the main pipe and opened / closed by a solenoid valve and the solenoid valve. A pressure reducing valve device having a pressure reducing valve that is driven to adjust the pressure of water flowing through the main pipe, and controls the electromagnetic valve when water leaks based on a detection signal from the water leakage sensor, and closes the main pipe by the pressure reducing valve. An emergency water leakage shutoff device for water supply equipment, comprising: 2. The water leakage emergency shutoff device for water supply equipment according to claim 1, wherein the water leakage sensor is arranged under a floor of a building.