JP2002089776A - Piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping structure capable of preventing a water hammer in a pipe by providing an air sump in the line. SOLUTION: In this piping structure, the water hammer produced in the line 10 is absorbed by the opening and closing of a stop valve 12 installed in the line 10. A rise pipe 11 with the upper end 11 thereof clogged is connected to a part of the line 10, and an air layer formed in the rise pipe 11 is open to the inside of the line 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure capable of preventing a water hammer in a pipeline.

[0002]

2. Description of the Related Art Conventionally, hot water of an electric water heater using electric power at midnight is supplied to a bathtub or the like through an attached conduit. An electric mixing valve and an opening / closing valve that can be remotely controlled are provided in the above-mentioned pipeline, and the mixing and flow rate of hot and cold water in the pipeline are controlled. At that time, if the electric on-off valve is closed and the flow rate in the pipeline is suddenly cut off, a so-called water hammer shock wave of a water hammer phenomenon occurs in the pipeline, causing noise in the pipeline, the pipeline system, the electric on-off valve, etc. It is a cause of breakage and the like.

A water hammer prevention device is described in Japanese Patent Application Laid-Open No. Hei 8-21567. The above publication discloses a water supply device that includes a water guide tube and a faucet device that is connected to a water distribution source tube and guides water from the water distribution source tube, and that supplies water from the water distribution source tube through a discharge port of the faucet device. A foamed viscoelastic body is incorporated in a component part in a state of communicating with a water supply passage from the water distribution pipe to the discharge port, so that it can be easily and inexpensively configured with a simple structure.

[0004]

However, as described in the above-mentioned publication, the shock wave in the pipeline is absorbed by the prevention device provided in the faucet, and the shock wave caused by the water hammer phenomenon generated in the pipeline is prevented. It had a piping structure that could not be used. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a piping structure capable of providing an air pocket in a pipeline and preventing a water hammer in the pipeline. .

[0005]

According to a first aspect of the present invention, there is provided a piping structure in which a water hammer generated in the pipeline by opening and closing an on-off valve provided in the pipeline is absorbed. A standpipe whose upper end is closed is connected to a part of the duct, and an air layer formed in the standpipe is opened into the duct.

According to a second aspect of the present invention, the vertical pipe is provided in a pipe for automatic hot water supply to a bathtub or the like by an electric water heater.

[0007]

According to a first aspect of the present invention, in the pipe structure of the present invention, a standpipe whose upper end is closed is connected to a part of the pipe, and an air layer formed in the standpipe is opened into the pipe. The shock wave caused by the water hammer generated when the on-off valve in the pipeline is suddenly closed and the flow of fluid in the pipeline is suddenly shut off can be absorbed by the air layer in the pipeline, Propagation of the shock wave to the whole can be prevented.

In the piping structure according to the second aspect of the present invention, since the upright pipe is provided in a pipe for automatically supplying hot water to a bathtub or the like by an electric water heater, a plurality of on-off valves provided in the pipe. The shock wave generated by the water hammer generated when the flow of hot and cold water in the pipeline is suddenly shut off by closing the pipe rapidly is absorbed by the air layer in the pipeline, and the propagation of the shock wave to the entire pipeline can be prevented. .

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a piping diagram for explaining a piping structure of the present invention, and FIG. 2 is a piping system diagram showing an embodiment in which the piping structure of the present invention is used for automatic hot water supply to a bathtub.

As shown in FIG. 1, in the piping structure of the present invention, the flow rate of hot and cold water flowing in the pipeline 10 is controlled by an on-off valve 12 provided in the pipeline 10, and when the on-off valve 12 is rapidly closed. In addition, the water hammer of the water hammer phenomenon generated in the pipeline 10 is absorbed.

That is, the upper end 111
Is connected. An air layer is formed inside the standing pipe 11 in a sealed state, so that it is a so-called air pool.

The lower end 112 of the standpipe 11 is connected to the pipes 101 and 102 forming the conduit 10 by the pipe joint 104. The lower part of the air layer sealed in the vertical pipe 11 is opened to the canal 10 so as to be in contact with the hot and cold water surface in the canal 10.

The pipe 10 is formed by connecting pipes 101, 102, and 103 with pipe joints 104 and 105, and has an end portion that can be connected to equipment and the like. An on-off valve 12 that can control the flow rate of the fluid in the pipe 10 is provided in the middle of the pipe 10. Depending on the valve opening of the on-off valve 12,
The flow rate of hot and cold water in the pipeline 10 is controlled.

The fluid in line 10 is divided into tubes 101, 102,
It flows in the direction of 103. The flow direction of the pipe 101 is bent at the pipe joint 104.

A branch pipe 11 is connected to the pipe joint 104 in a branched manner. The upper end 111 of the standpipe 11 is closed with a lid to form a sealed air layer, and the lower end 112 is
At 12 is connected to the conduit 10.

The inside of the standing pipe 11 is formed as an air reservoir in which a flow path is blocked by a sealed air layer. The air layer of the standpipe 11 is opened at the lower end 112 into the pipe 10 so that the fluid in the pipe 10 can flow in.

When the on-off valve 12 of the pipe 10 is suddenly closed, the flow of the fluid is suddenly blocked and a water hammer phenomenon occurs. The so-called water hammer shock wave of the water violence phenomenon can be absorbed by the air layer in the tube 11.

As the material of the standing tube 11, a copper tube or a synthetic resin tube is used, and an elastic rubber tube which is easily deformed may be used.

FIG. 2 shows an embodiment in which a vertical pipe is used in a sluice used for automatic hot water supply to a bathtub by an electric water heater.

As shown in FIG. 2, the electric water heater 20 draws in water through conduits 23 and 24 into the tank 21 by using electric power at midnight and heats the water by a heater in the tank 21 to supply water at a predetermined rate. Heating to temperature.

The hot water of the electric water heater 20 is supplied to hot water supply channels 25, 2
The hot water is supplied to the bathtub 22 through 6. The hot water supply pipe 26 forms a circulation path with the bathtub 22 so that hot water can be poured into the bathtub 22.

The primary water supply to the electric water heater 20 is controlled by the pressure reducing valve 3
The water is supplied to the tank 21 at a constant water pressure via a zero. The primary water supply is supplied to the electric mixing valve 28 through another pipe 29.

Hot water is supplied to the bathtub 22 by automatically controlling the water level sensor, the electric mixing valve 28 and the like. Hot water to bathtub 22 is circulated by hot water supply channel 26
Hot water and water are mixed at an appropriate temperature and supplied by the electric mixing valve 28.

A standing pipe 27 is provided in the middle of the hot water supply pipe 26. The upright 27 is closed at the upper end and opened at the lower end to the hot water supply conduit 26 and connected thereto.

The control of the amount of hot water in the hot water supply channel 26 is performed by repeatedly opening and closing the electric open / close valve 31 provided in the hot water supply channel 26.

The opening and closing of the electric on-off valve 31 is performed electrically, and when the valve is closed, a sharp flow of hot water is cut off, and a water hammer shock wave of a water hammer phenomenon is generated in the hot water supply line 26.

The shock wave generated in the hot water supply pipe 26 flows into a standing pipe 27 provided in the hot water supply pipe 26.

The shock wave is reduced by flowing into an air layer sealed inside the vertical pipe 27 so as not to propagate to another hot water supply pipe 25.

[0029]

According to the first aspect of the present invention, in the pipe structure, a standpipe having an upper end closed is connected to a part of the pipe, and an air layer formed in the standpipe is provided in the pipe. Because it is open, the shock wave caused by the water hammer generated when the on-off valve in the pipeline is suddenly closed and the pipeline is shut off can be absorbed by the air layer in the vertical pipeline, and the shock wave to the entire pipeline can be absorbed. Propagation can be prevented.

In the piping structure according to the second aspect of the present invention, since the vertical pipe is provided in a pipe for automatic hot water supply to a bathtub or the like by an electric water heater, a plurality of on-off valves provided in the pipe are provided. The shock wave generated by the water hammer generated when the flow of hot and cold water in the pipeline is suddenly shut off by closing the pipe rapidly is absorbed by the air layer in the pipeline, and the propagation of the shock wave to the entire pipeline can be prevented. .

[0031]

[Brief description of the drawings]

FIG. 1 is a piping diagram illustrating a piping structure of the present invention.

FIG. 2 is a piping system diagram showing an embodiment in which the piping structure of the present invention is used for automatic hot water supply to a bathtub.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pipeline 101 Pipe 102 Pipe 103 Pipe 104 Pipe joint 105 Pipe joint 11 Stand pipe 111 Upper end 112 Lower end 12 On-off valve 20 Electric hot water 22 Bathtub 28 Electric mixing valve 31 Electric on-off valve

Claims (2)

[Claims] 1. A piping structure in which a water hammer generated in a pipeline by opening and closing an on-off valve provided in the pipeline is absorbed, and a standing pipe whose upper end is closed is connected to a part of the pipeline. A piping structure, wherein an air layer formed in the standing pipe is opened in the pipe. 2. The piping structure according to claim 1, wherein the vertical pipe is provided in a pipe for automatic hot water supply to a bathtub or the like by an electric water heater.