JPH07167370A - Water-hammer phenomenon preventing device in water and hot water feed header - Google Patents

Abstract

PURPOSE:To prevent a water-hammer phenomenon and constantly secure appropriate flow by fitting throttles to the branch port of each header reaching individual faucets. CONSTITUTION:In the case of a multiple dwelling house, for instance, water and hot water fed to combination faucets 9 reaches water and hot water feed headers 11 via a branch pipe 2 branched from a main pipe 1 and reaches the combination faucets 9 after being branched at the branch ports of the headers 11. The feed quantity of water or hot water flows out to the combination faucet 9 side after being controlled into the flow preset by throttles 12 so as to prevent or reduce the generation of a water-hammer phenomenon. Even in the case of the combination faucet being suddenly closed, water-hammer wave is not generated or extremely small since the flow is regulated into such flow as to prevent or reduce the generation of the water-hammer phenomenon. As a result, the water-hammer phenomenon is not generated. Even if generated, the sound is so small as to be ignored.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to water supply and hot water supply headers designed to prevent or reduce the water hammer phenomenon that occurs when a faucet is suddenly closed.

[0002]

2. Description of the Related Art With the increase in the height and size of buildings, the amount of hot water or cold water supplied has increased, and the so-called water hammer phenomenon has become conspicuous. The water hammer phenomenon is that if a water tap or an automatic valve is momentarily closed while a fluid is flowing at a constant speed, the velocity of the fluid instantly becomes zero, and the kinetic energy of the fluid increases the pressure of the fluid. It is converted to elastic energy of the pipe, and this state of zero velocity and pressure rise sequentially advances to the upstream side of the pipe, becomes a pressure wave, reciprocates between that point and the reflection point, and gradually attenuates. It is a phenomenon in which sound is generated multiple times. When this water hammer phenomenon occurs, particularly in the case of a high-rise apartment house, this sound reverberates in the pipe shaft, for example, and spreads throughout the building, deteriorating the living environment.

Therefore, for the purpose of preventing the water hammer phenomenon, an example is known in which a preventive device called an air chamber is attached to a main part of the pipe.

FIG. 4 shows a known example in which this air chamber is attached, 1 is a main pipe (vertical pipe), 2 is a branch pipe, 3
Is a water stopcock, 4 is a meter, 5 is a check valve, 6 is a water heater, 7
Is a hot water supply pipe, 8 is a water supply pipe, 9 is a water faucet, and 10 is an air chamber attached to both the hot water supply pipe 7 and the water supply pipe 8.

[0005]

However, the means for preventing the water hammer phenomenon in the air chamber 10 has the following drawbacks. a. Air chamber 1
Since 0 has a large shape, it may be difficult to mount it at an appropriate position depending on the piping conditions. b. Usually, 5 to 6 air chambers 10 are attached to one dwelling, which is expensive.

It is an object of the present invention to propose a water hammer and water hammer phenomenon prevention device for a water supply and hot water supply header which does not have the drawbacks described in the above a and b.

[0007]

The structure of the water hammer and water hammer phenomenon prevention device in the hot water supply header according to the present invention is as follows. A water hammer phenomenon prevention device in a water supply and hot water supply header, which is provided with a throttle set to a flow rate that does not cause or reduce the water hammer phenomenon at branch ports leading to individual faucets.

[0008]

[Function] For hot water supply and water supply to the faucet, for example, in the case of an apartment house, it goes to the water supply and hot water supply header via the branch pipe branched from the main pipe (vertical pipe) and is branched at the branch port of this header. To each faucet. The amount of hot water or water supplied is controlled by a throttle to a flow rate at which a preset water hammer phenomenon does not occur or is reduced, and then flows out to the faucet side. Further, even if the faucet is suddenly blocked, the flow rate is regulated to a flow rate that does not cause the water hammer phenomenon or a flow rate that reduces the water hammer phenomenon, so that a water hammer wave does not occur or is very small. The water hammer phenomenon does not occur, or even if it occurs, the sound is negligible.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. Reference numeral 1 is a main pipe (vertical pipe), 2 is a branch pipe, 3
Is a water stopcock, 4 is a meter, 5 is a check valve, 6 is a water heater, 7
Is a hot water supply pipe, 8 is a water supply pipe, and 9 is a mixed faucet. 11
Is a header attached to the outlet side of the water heater 6, and each mixing faucet 9 and this header 11 are connected by a branch pipe 14. Reference numerals 12 are throttles attached to the branch ports 13 of the header 11, respectively. The throttles 12 are adjusted in advance so that the flow rate does not cause the water hammer phenomenon or the flow rate is reduced. Therefore, even if the mixed tap 9 is suddenly closed, the water hammer wave is small, and the sound is negligible even if the water hammer phenomenon does not occur. Reference numeral 15 in the drawing is a pipe fixing base.

[0010]

As described above, the present invention has the following effects because the diaphragm is attached to the branch opening of the header. a. By setting the supply water flow rate to a value that does not cause or reduces the water hammer phenomenon by the throttle, the water hammer phenomenon does not occur even if the faucet is suddenly closed, or the sound is small even if it occurs. b. The aperture is small and inexpensive and therefore inexpensive. c. The flow rate can be adjusted for each faucet by setting the throttle.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a water hammer phenomenon prevention device in a hot water supply and water supply header according to the present invention.

FIG. 2 is an explanatory diagram of a header.

FIG. 3 is an explanatory diagram of a branching portion of the header.

FIG. 4 is an explanatory view of a known example with an air chamber attached.

[Explanation of symbols]

 1 Main pipe 2 Branch pipe 3 Water stop valve 4 Meter 5 Check valve 6 Water heater 7 Hot water supply pipe 8 Water supply pipe 9 Mixing faucet 10 Air chamber 11 Header 12 Throttling 13 Branch port 14 Branch pipe 15 Fixed mouthpiece

Claims (1)

[Claims] 1. A water hammer phenomenon prevention device for water supply and hot water supply headers, each of which is provided with a restrictor set at a flow rate that does not cause or reduces the water hammer phenomenon at a branch port leading to each faucet. [0001]