JP2566451Y2 - Building water supply system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a water supply system for a building such as an office building or an apartment house (in this specification, a water supply system is a terminal such as a curan for taking out water or hot water outside the system). In addition to the system for supplying water or hot water to the container, it is intended to include a system for supplying cold or hot water to a terminal having a large resistance, such as an air-conditioning fan coil unit provided in the circulation system.) It is.

[0002]

2. Description of the Related Art In general, in a water supply system for buildings such as office buildings and apartment buildings, when a water leakage accident occurs due to a slip-off of a vinyl pipe or a helise pipe in a water supply piping system after completion of the building, the interior finishing is performed. Many of the materials, furniture, OA equipment, and other equipment, products, exhibits, and the like placed in the room are ruined, and the damage is enormous.

[0003] For this reason, conventionally, as a measure for preventing a water leakage accident beforehand, confirmation of the presence or absence of leakage at a pipe connection portion by a pressure resistance test, repair of a defective portion, retightening of a connection cap nut, and the like have been performed. However, even if it is determined to be normal in the pressure resistance test, the degree of poor connection progresses during actual use of water supply due to the water hammer phenomenon caused by opening and closing valves, fluctuations in water pressure, etc., or other external causes. It is not an exaggeration to say that it is practically impossible to completely prevent water leakage accidents.

[0004]

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned current situation, and its purpose is to solve the problem in the event of a water leakage accident due to a slip off of a vinyl tube or a helise tube. An object of the present invention is to provide a building water supply system capable of immediately closing a water supply pipe and minimizing damage caused by a water leakage accident.

Another object of the present invention is to cause a water leakage accident due to a plastic tube or a helise tube slipping off due to an economical configuration having a smaller number of valves than the number of terminals connected to a water supply pipe. It is an object of the present invention to provide a building water supply system capable of minimizing damage at the time of construction.

[0006]

The technical means taken by the present invention to achieve the above object are as follows. In other words, the water supply system for buildings according to the present invention
The water supply pipe is branched into multiple systems on the downstream side, and
Each terminal has multiple terminals connected to each
To the water supply pipe on the upstream side of the terminal
Water that is larger than the maximum usage by all terminals
That are configured to automatically shut off
It is characterized by a sudden shut-off valve.

[0007]

According to the above construction, when a water leak accident occurs at a pipe connection part or the like to a terminal device due to a slip off of a vinyl tube or a helise tube, etc., the emergency shut-off valve is more than the maximum usage by the terminal device. A large flow of water will flow and the emergency shut-off valve will automatically shut off, preventing any further outflow of water.

In addition , even if a water leak accident occurs due to a drop in a vinyl pipe or a helise pipe at a pipe connection portion of any one of a plurality of terminals connected to each system, the system is connected to that system. The interposed emergency shut-off valve will automatically shut off, preventing further water outflow.

In the present invention , if a gate valve which can be opened and closed manually is provided downstream of the emergency shut-off valve, the emergency shut-off valve which has been shut down due to the occurrence of a water leakage accident or malfunction is returned to its original open state. Can be easily restored. That is, if the gate valve provided on the downstream side of the emergency shut-off valve is closed by manual operation in a state where the emergency shut-off valve is in the shut-off operation, the small amount of leakage from the leak micro flow path formed in the valve seat of the emergency shut-off valve is reduced. The water pressure gradually increases on the downstream side of the valve body due to the generated water, and when the upstream and downstream water pressures of the valve body are balanced, the valve body is actuated by the urging force of the spring incorporated in the emergency shutoff valve. It will move upstream of the seat and return to its original open state.

[0010]

FIG. 1 shows an example of a valve A which can be suitably used in a building water supply system to be described later. This valve A
Is characterized in that an emergency shutoff valve (water fuse) 1 and a gate valve 2 that can be opened and closed manually are integrally formed.

[0011] configuration itself of the emergency shut-off valve 1 are known. That is, inside the emergency shutoff valve 1, the valve seat 3, the ball-shaped valve element 4 disposed upstream of the valve seat 3, and the valve element 4
And a spring 5 for biasing the opening in the opening direction.
The valve seat 3 is provided with a leak microchannel (not shown) by, for example, damaging a part of the surface that is in close contact with the valve element 4. When the flow rate of water flowing between the valve element 4 and the valve seat 3 becomes equal to or greater than the flow rate set by the urging force of the spring 5, the valve element 4 closes against the urging force of the spring 5, and closes.
The flow path is automatically shut off. Also,
When the downstream side of the flow path is closed in a state where the flow path is shut off, due to water leaking from the leak micro flow path,
The water pressure on the downstream side of the valve body 4 gradually increases, and the valve body 4 is opened by the urging force of the spring 5 when the water pressure on the upstream side and the water pressure on the downstream side of the valve body 4 are balanced.

[0012] configuration of the gate valve 2 is also of a known handle 8 is attached to the screw shaft 7 connected to freely rotate only the valve body 6, by rotating the the handle 8, the casing 9 inside surface The screw shaft 7 is moved in the axial direction by a screw action with the female screw formed in the valve body 6 to open and close the valve 6. Although not shown, when configuring the valve A, the casing of the emergency shutoff valve 1 and the gate valve 2 may be manufactured integrally, or, as in the illustrated embodiment, the emergency shutoff valve 1 and the gate valve 2 and 2 may be manufactured separately, and both 1 and 2 may be screwed and connected to be integrated.

[0013] Figure 2 illustrates one embodiment of a water supply system of a building according to the present invention. This water supply system is configured as follows. Reference numeral 10 denotes a water supply pipe of each dwelling unit in an apartment house, which is branched into a plurality of systems 10A, 10B, and 10C on the downstream side of the water meter 19, so that each of the water supply pipes can be used while securing the water supply amount as a whole. Line 10
The flow rates of A, 10B, and 10C are configured to be small.

The system 10A includes a water heater 2 as a terminal device.
0, and a hot water supply curan 21a of a wash basin 21 as a terminal device, a hot water supply curan 22a of a bathroom 22, and a hot water supply curan 23a of a sink 23 are connected to the downstream side thereof. A water supply curan 21b of the vessel 21 and a water supply curan 22b of the bathroom 22 are connected, and a system 10C is connected.
Is connected to a water supply curan 23b of the sink 23 and a water supply curan 24b of the flush toilet 24 as a terminal.

In the vicinity of the branch point in each of the systems 10A, 10B, and 10C, a valve A having the above-described configuration (an emergency shutoff valve 1 and a gate valve 2 that can be opened and closed manually) are arranged in this order from upstream. Provided valve) is interposed.

The emergency cutoff valve 1 valve A interposed in each line 10A, 10B, 10C is the system 10A, 10
B and 10C are configured to automatically shut off when a flow of water larger than the maximum usage by all the terminals flows. That is, the emergency cutoff valve 1 interposed in the system 10A is set to perform a shutoff operation by flowing a flow of water larger than the flow when the hot water supply currans 21a, 22a, and 23a are fully opened at the same time. The emergency shut-off valve 1 interposed in the water supply currans 21b, 22b
Is set to perform a shut-off operation by flowing a larger flow rate of water than the flow rate at the same time when the system is fully opened.
The emergency shut-off valve 1 interposed in the water supply curan 23b, 2
The shut-off operation is set by the flow of water having a flow rate larger than the flow rate when 4b is simultaneously fully opened.
25 in the figure is a water stopcock.

According to the above arrangement, each system 10A, 10
B, 10C hot water supply curan 21a, 22
a, 23a and water supply currans 21b, 22b, 23b, 2
4b, even if a water leakage accident occurs due to a slippage out of the helise tube at any of the pipe connections of the callan, the emergency shut-off valve 1 interposed in the system automatically shuts off, This will prevent the outflow of water.

[0018] It should be noted that, in the state each Curran, which was fully open,
In order to prevent the amount of water that exceeds the required amount from flowing out, a constant flow valve should be provided immediately before the callan, the maximum flow rate of the callan should be reduced by the water stopcock 25, or a throttle should be provided inside the callan. It is desirable to make the difference between the flow rate at which the shutoff valve 1 performs the shutoff operation as large as possible.

[0019]

According to the present invention , when a water leak accident occurs due to a drop in a vinyl pipe or a helise pipe, the water supply pipe can be immediately closed to minimize the damage caused by the water leak accident.

In particular, according to the present invention , an emergency shutoff valve is not provided for each terminal, but a larger flow rate of water flows for each branch system than the maximum usage by all the terminals in the system. An emergency shut-off valve that automatically shuts off the water will be installed, so an economical configuration with fewer valves than the number of terminals connected to the water supply pipe will result in a water leakage accident due to slip-through of vinyl pipes or helise pipes, etc. In the event of occurrence, damage can be minimized.

[Brief description of the drawings]

FIG. 1 is a sectional view of a valve in which an emergency shutoff valve and a gate valve are integrated.

FIG. 2 shows an embodiment of a building water supply system according to the present invention.
FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Emergency shut-off valve, 2 ... Gate valve, 10 ... Water supply pipe, 10
A, 10B, 10C: System , 19 : Water meter, 21a, 2
2a, 23a: hot water supply curan (terminal device), 21b, 22
b, 23b, 24b ... water supply curan (terminal device).

Claims (1)

(57) [Scope of request for utility model registration] 1. A water supply pipe is provided downstream of a water meter.
Divide into multiple systems and connect multiple terminals to each system
And water supply upstream of the most upstream terminal in each system
For each pipe section, use the maximum
Automatically blocked by a flow of water greater than the dose
Emergency shut-off valve configured to shut off
A building water supply system characterized by the following: