JP3069531U - A relief valve device that can be installed on a fire hydrant - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In order to avoid water outage due to water pipe leak repair in a high water pressure area, an arbitrary stable water pressure capable of achieving both repair and water supply is locally generated. The relief valve device can be installed in a fire hydrant. The equipment shall be installed in a fire hydrant, including a repair point and a fire hydrant, and closed by a valve so that water can be cut off. The flow rate into the area is regulated by one of the valves. The surplus water, which is the difference with the fluctuating demand in the area, is discharged sequentially by the operation of the relief valve of the device, so that a stable water pressure can be provided in the area.

Description

[Detailed description of the invention]

[0001]

[Prior art]

 There are a number of equipment for repairing water leaks in water pipes, which makes it possible to repair water without interruption. However, under high water pressures where the water pressure exceeds about 0.5 MPa, packing often falls off or breaks even at the Yanojoint, which is a representative of water pipe uninterrupted water repairs. is there.

[0002]

[Problems to be solved by the invention]

 However, given the increasing dependence on water supply and the change in consciousness of residents in recent years, it is currently difficult to obtain the understanding and cooperation of sudden interruption of water supply. In order to achieve this, it is required that any stable water pressure that can balance repairs and water supply be created locally.

[0003] As an existing method for lowering the water pressure at the repair site, as shown in Fig. 1, when one of the valves 1 to be closed in the case of water outage is operated, the flow rate into the area is limited by operating one of the valves 2 to be closed. However, it requires a large amount of drainage from the fire hydrant 3 in order to absorb fluctuations in the demand in the area, and there is a problem that there is much waste and the water pressure is never stable.

[0004]

[Means for Solving the Problems]

 Therefore, in order to ensure the pressure reduction by the valve operation described above, a relief valve device that can be installed in the fire hydrant 3 for draining was devised. If this is used, as shown in Fig. 2, the surplus water 7 which is the difference between the almost constant inflow 5 from the restricted valve and the fluctuating demand 6 in the area is successively operated by the relief valve of the device. Since the water can be discharged, it is possible to provide a stable water pressure 8 in the area with a simple operation and a small amount of drainage.

[0005] At the time of installation, the valve 2 of the fire hydrant 3 is gradually adjusted while gradually decreasing the valve 2 for adjusting the opening while simultaneously adjusting the discharge flow rate from the apparatus to an intermediate value. When the valve of the fire hydrant 3 is fully opened, the operation is completed. Even after the adjustment is completed, if the amount of inflow into the area is too large or too small due to a large change in the demand in the area or a sudden change in the amount of water leakage due to the repair process, the discharge of the equipment and the indication of the water pressure gauge The adjustment valve 2 is readjusted as needed while checking.

[0006]

[Embodiment of the invention]

 It is considered that the device according to the present invention preferably has a shape based on a hydrant stand pipe in consideration of easiness of attachment / detachment to a hydrant and confirmation of water pressure. As an example, the one shown in FIG. 3 has a relief valve 12 at the discharge port at the upper part, a water pressure gauge 13 on the primary side thereof, and a handle 14 also serving as a protection frame for the water pressure gauge, and a fire extinguisher at the lower part. It has a stopper coupling 15.

[0007] As the specifications of the relief valve, it is considered appropriate that the set pressure adjustment range is about 0.1 MPa to 0.3 MPa, and the discharge flow rate when the set pressure exceeds 0.1 MPa is about 150 l / min. .

[0008]

[Effect of the invention]

 In many cases, such as when a large-diameter water faucet is damaged, it is necessary to cut off the water from the excavation stage.However, if the pressure is reduced using the invented device, temporary water can be stopped using a wooden plug, etc. It is also effective in making.

[0009] If water cutoff can be avoided, public relations for residents will be reduced in water pressure and become unstable, so the number of complaints and inquiries will be sharply reduced compared to when water cutoff, and it will not be necessary to arrange a water supply tank etc. So labor savings in repair support can be achieved.

[0010] As the water distribution pressure rises toward the 3rd and 5th floor direct supply water, the unrepaired water repair becomes more difficult and the effect of the water cutoff increases. Among them, the role played by the device according to the present invention is considered to be enormous.

[Brief description of the drawings]

FIG. 1 is a model diagram of a pressure reducing method by operating a valve.

FIG. 2 shows a fluctuation state of a flow rate and a water pressure when a relief valve device is used.

FIG. 3 is an external view of a relief valve device in a perspective view.

[Explanation of symbols]

 1 Close valve 2 Valve to limit and adjust inflow 3 Drain hydrant 4 Water leak repair point 5 Inflow into area 6 Demand in area 7 Surplus water in area 8 Water pressure in area 9 Flow rate 10 Water pressure 11 hours 12 Relief valve 13 Water pressure gauge 14 Handle 15 Coupling

Claims (1)

[Utility model registration claims] 1. A relief valve device which can be connected to a fire hydrant on a water supply pipe by a coupling, and a water pressure gauge is attached to a relief valve primary side.