JPH11166251A - Drainage method in water pipe in header piping, header piping structure used for executing method thereof, air supply device and reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply discharge water remaining in water or hot water supplying water pipes plumbed with a header method by a simple device and to make it possible to prevent the water in the water pipes from being frozen. SOLUTION: Water remaining in water supply pipes 15 plumbed between a header H1 for branching and supplying water from a water main to water supply sections A1 -A5 and the water supply sections A1 -A5 is discharged. In that case, compressed air is supplied to the inside of the header H1 from an air supply device E1 to pressurize in a state to open faucets V1 -V5 of the water supply sections A1 -A5 , and water in the water supply pipes 15 is discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for draining water from a water pipe in a header pipe having a structure in which water supplied from a water main is branched and supplied to each water supply section by a header, and a header pipe structure used for carrying out this method. , An air supply device, and a header.

[0002]

2. Description of the Related Art There is a problem that water in a water supply pipe freezes during a winter season in a cold region, making it impossible to supply water. In order to solve this problem, when the water supply pipe is a steel pipe, a method of energizing an electric heating element wound around the outer peripheral surface thereof to melt frozen water in the water supply pipe has been implemented. However, the work of winding the heating element over the entire length of each water supply pipe installed in the house is troublesome and costly. In the case where water is not used continuously for a certain period of time, such as when a resident is absent for several days or for a long period of time, the above-mentioned method of using a heating element allows the heating element to be used for a long time. In addition to wasteful heat generation, which is uneconomical, there is also the problem of ignition from the electric heating part and lack of safety.

On the other hand, instead of the above steel pipe,
A construction method of passing an ordinary resin pipe for water supply through a corrugated flexible resin pipe called a “sheath pipe” has also been implemented. In this "Saya pipe method", the outer peripheral portion cannot be heated because the resin pipe which is a water supply pipe is inserted into the sheath pipe and is not exposed to the outside, and since the water supply pipe is a resin pipe. Therefore, the heating element cannot be used. Therefore, it is more difficult to thaw the frozen water in the resin tube.

In order to supply water from the water main to a number of water supply units in a house, a manifold called a "header" is used, and the water supplied from the water main is connected to the header. Guided by a pipe, from the header to each water supply,
"Header construction method" is being implemented, which is branched and supplied through each water supply pipe. The “header method” has an advantage that branch pipes can be collectively arranged at one place, and is frequently used recently, and is often used in combination with the “saya pipe method”.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention provides a simple device for easily discharging water remaining in a water supply pipe or a hot water supply pipe provided by the header method. Another object of the present invention is to prevent freezing of water in a water pipe.

[0006]

In order to solve the above-mentioned problems, the present invention is directed to a pipe between a header for branching and supplying water from a water main to each water supply section and each of the water supply sections. A method of discharging water remaining in a water pipe,
The water in each water pipe is discharged by supplying compressed air into the header and pressurizing the header with the valve of the water supply unit opened.

If the valve of the water supply section is opened and compressed air is supplied into the header to make the air pressure higher than the atmospheric pressure, the water remaining in the water pipe is easily discharged from the water supply section. It can be drained. In this case, only the valves of the water supply section to be drained are opened, and the valves of all the remaining water supply sections are closed, and compressed air is supplied into the header. Since it acts intensively, there is an advantage that the drainage can be reliably performed even if the air pressure of the compressed air is not so high.

To increase the air pressure in the header, an air supply device having an air supply unit filled with compressed air is used. If the air supply device is connected to the connection part of the header with the water pipe and the valve provided on the header side or the air supply device side is opened, compressed air flows into the header and is added. Pressed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to examples. FIG. 1 is an overall piping diagram showing the piping from the water main 1 to each of the water supply sections A _{1 to} A ₅ in the house R, and FIG. 2 is a perspective view of a header piping portion according to the present invention. Figure 3 is an enlarged view of a state in which the air supply device E ₁ is connected to the valve unit 14 to the header H ₁ that includes the integrally. In FIGS. 1 and 2, a water main 1 has a branch pipe 2.
There are connected, the header H ₁ that is plumbed to the branch pipe 2 and the house R are connected via an external connecting pipe 3.
A water stopcock 4 and a water meter 5 are incorporated in a connection portion between the branch pipe 2 and the external connection pipe 3, and a drain valve V ₀ is provided on the house R side of the external connection pipe 3 than the water meter 5. incorporated have, in the portion of the drain valve V _0, are to allow drainage of water in the external connection pipe 3.

As shown in FIG. 3, the header H _{1 according} to the present invention is provided with a large number of branch connection portions 12 at predetermined intervals along the longitudinal direction of the header main body 11. In order to connect with the external connection pipe 3, a connection portion 13 a having an internal thread (not shown) formed on the inner peripheral surface is provided at the other portion, and air from an air supply device E ₁ described later is provided at another end. This is a configuration in which a valve unit 14 for opening and closing the supply of water is provided.

The header piping shown in FIGS. 1 and 2
It is a piping structure that can perform both water supply and hot water supply.
₁ and in the bathroom A ₂ and lavatory A ₃ and sink A ₄ are both are piping water supply pipe and hot water supply pipe, the toilet A _5,
Only the water supply pipe is provided. The header H ₁ is of the water supply, with regard header H _'1 of the structure of the hot water supply, only a few of the branch connection portion 12 are different, the basic structure is identical to the header H ₁ for water supply It is. And
The water supply sections A _{1 to} A ₄ are respectively connected to headers H ₁ and H ′ ₁ for water supply and hot water supply via a water supply pipe 15 and a hot water supply pipe 16 made of a resin pipe by a sheath pipe method. Also, the toilet A ₅ represents, is connected only to the header H ₁ for water supply via the water supply pipe 15. Furthermore, the header H _1, water heater B is connected through a first internal connection pipe 17,
The water heater B and the header H ′ ₁ for hot water supply are connected via a second internal connecting pipe 18. In FIG. 1, each of the water supply units A _{1 to} A ₅ such as the bathtub is provided with a faucet V _1.
~V ₅ is attached. 1 and 2, the water supply pipe 15 and the hot water supply pipe 16 are indicated by solid lines and broken lines, respectively.

Further, the the valve portion 14 of each header H _1, H _'1 of water supply and hot water that are air supply device E ₁ is connected. The air supply device E ₁ is in the form of an air cylinder and has an air supply unit 21 in which a container is filled with compressed air and a male screw connected to the valve unit 14 of each of the headers H ₁ and H ′ _1. And a connecting portion 22 composed of: This air supply device E ₁ supplies compressed air into each of the pipes 15 and 16 when the water remaining in the water supply pipe 15 and the hot water supply pipe 16 may freeze, and pressurizes each of the pipes 15 and 16. the remaining aqueous within those discharging at the side of the water feed unit a ₁ to a _5. Therefore, the air supply device E _1, in the winter there is a risk of freezing of water in the tube, it may be left connected to the header H _1, H _'1, may be connected each time.

Then, for example, a header H ₁ and a bathtub A
_{In order} to discharge the water remaining in the water supply pipe 15 connecting the water faucet V ₁ and prevent the water from freezing, open only the water faucet V ₁ , Other water supply section A ₂
Keep Close all all faucet V ₂ ~V ₅ of A _5, by opening the valve plug 14a of the valve portion 14 of the header H _1. Accordingly, the air supply device E in the header H ₁
Compressed air is supplied from the _1, pressure due to the internal pressure is increased is the header H _1, the water remaining in the water supply pipe 15 that connects the water faucet V ₁ of the bathtub A ₁ acts, this water is discharged from a portion of the faucet V _1. Even when discharging the remaining water supply A ₂ to A ₅ of the water remaining in the water supply pipe 15 connected to a water faucet V ₂ ~V _5, in the same manner, the water supply pipe to discharge the water inside Fifteen
Only the faucet connected to is opened, and all the remaining faucets are closed, and the operation is performed in exactly the same manner as described above.

Further, if the stop time of the water heater B is long, the temperature of the water remaining in the hot water supply pipe 16 connected to each of the water supply units A _{1 to} A ₄ may drop and freeze.
Addressed this case, by connecting the air supply device E ₁ header H _'1 of hot water supply, the water supply unit A ₁ to A to be drained
_If only the faucet connected to any one of ₄ is opened and all the remaining faucets are closed, compressed air is supplied to the header H ′ ₁ and the inside thereof is pressurized. , water remaining in the hot water supply pipe 16 is discharged on the side of Kakumizusen V ₁ ~V _4.

Furthermore, in order to prevent the water remaining in the external connection pipe 3 that connects the header H ₁ for water supply and an external stop cock 4 houses R freezing, discharging the water In this case, substantially the same operation as described above may be performed. That is, the close stop cock 4 incorporated in the external connection pipe 3, open the drain valve V _0, all of the water supply portion A in the housing R
In the state of closed each faucet V ₁ ~V ₅ of ₁ to A _5, it is only for supplying compressed air into the header H _1.

Each of the headers H ₁ and H ′ ₁ has a valve unit 14 for integrally opening and closing the supply of compressed air. Therefore, the valve units are provided on the side of the air supply device E _1. Although there is also a good advantage is not provided, as shown in FIG. 4, it is also possible to use a general header H _2. The header H _2, the connection portion 13a made of internally threaded at both ends of the header body 11, 13b is a structure in which respectively. In the case of the header H ₂ is 4
As shown in the figure, a separate valve body 31 is used,
Alternatively, as shown in FIG. 5, it is necessary to use the air supply device E ₂ the valve 23 is provided in the air supply body 21.

FIGS. 6 and 7 show other air supply devices E ₃ and E ₄ . Air supply device E _3, for example, be such as a portable compressor, in the case where there is a risk that water in the tube is frozen, the vehicle equipped with the compressor cycles through each housing, coupling Hose 3
2 to the header H ₂ to discharge water remaining in the water supply pipe 15 or the hot water supply pipe 16. In this case, if the pressure of the compressor is increased, all the faucets V _{1 to} V ₅ of the water supply section in the house are opened, unlike the air supply devices E ₁ and E _{2 in the} form of the air cylinder described above. In addition, it is possible to simultaneously discharge water remaining in all pipes. Further, the air supply device E ₄ is a large-sized device that is installed and used in a house,
Hose connector 34 provided in the air supply device E
₄ is connected via a first connection hose 35,
Only when the water in the pipe may freeze,
Using the connecting hose 36, the connects the hose connector 34 and header H _2, a configuration for supplying a high-pressure compressed air of the air supply device E ₄ in the header H _2.

Although the above embodiment is an example in which the header and each water supply section are connected by the "sheath pipe method", the header and each water supply section are provided at a portion of the header having a large number of branch connection sections. As long as the "header method", which is branched and connected via a number of water pipes, is used, the method is not limited to the "saya pipe method", and the resin pipe is exposed and piped, or the "conventional method" The present invention is also applicable to the method of piping steel pipes described in the section of “Technique”. However, when the present invention is applied to a resin tube whose outer peripheral portion cannot be heated at a high temperature, the effect is particularly large.

[0019]

According to the method for draining water in a water pipe according to the present invention, in the header method, only the compressed air is supplied into the header and pressurized, and the water remaining in the water pipe is removed from the water supply side. , The water in the water pipe in a cold region can be prevented from freezing by a simple method.

Further, since the above drainage method only needs to employ a header piping structure in which an air supply device is connected to the header, the implementation is simple and relatively inexpensive.

[Brief description of the drawings]

FIG. 1 Each water supply section A _{1 to} A ₅ in the house R from the water main 1
FIG. 2 is an overall piping diagram showing the piping up to FIG.

FIG. 2 is a perspective view of a header pipe according to the present invention.

3 is an enlarged view of a state in which the air supply device E ₁ is connected to the valve unit 14 to the header H ₁ that includes the integrally.

Air supply device E ₁ is an enlarged view of a connected state in FIG. 4 header H ₂ through the valve body 31 of the separate.

In Figure 5 the header H _2, an enlarged view of a state in which the air supply device E ₂ having a valve portion 23 integrally is connected.

FIG. 6 shows a portable air supply device E ₃ mounted on a header H ₂ .
FIG. 3 is an enlarged view of a state in which is connected via a connecting hose 32.

[7] The header H _2, stationary air supply device E
_{FIG. 4} is an enlarged view of a state where the connection is made via first and second connection hoses 35 and 36.

[Explanation of symbols]

A _1: bath (water supply unit) A _2: bath (water supply unit) A _3: lavatory (water supply unit) A _4: sink (water supply unit) A _5: Toilet (water supply unit) E ₁ ~E _4: air supply device H ₁ , H ₂ : header for water supply H ′ ₁ : header for hot water supply R: house V ₀ : drain valve V _{1 to} V ₅ : faucet (valve) 1: water main 13 b: air supply device of header 14: Valve section of header 15: Water supply pipe (water pipe) 16: Hot water pipe (water pipe) 21: Air supply body section 22: Connection section of air supply apparatus 23: Valve section of air supply apparatus

Claims (6)

[Claims] 1. A method for discharging water remaining in a water pipe provided between a header for branching and supplying water supplied from a water main to each water supply section and a water pipe provided between each water supply section. By opening the valve of the water supply unit, supplying compressed air into the header and pressurizing the water, the water in each water pipe is discharged, and the drainage in the water pipe in the header pipe is characterized in that: Method. 2. The supply of the compressed air is performed for each water pipe with only valves of water supply sections connected to water pipes to be drained opened and valves of all other water supply sections closed. The method for draining water in a water pipe in a header pipe according to claim 1, wherein: 3. A header pipe structure in which a water pipe is connected between the header and each water supply section so that water supplied from a water main can be branched and piped to each water supply section by a header. A header piping structure, wherein an air supply device for supplying compressed air into the header and pressurizing the same to discharge water in the water pipe to each water supply unit side is connected. 4. An air supply device used to supply compressed air to a water pipe installed between a header and each water supply section and discharge water inside the water pipe to a water supply section side. A connection unit connected to the header; an air supply unit for supplying compressed air into the header to pressurize the water so that water in the water pipe is discharged to each water supply unit; An air supply device, comprising: a valve unit for opening and closing supply of compressed air by a body unit. 5. A header for connecting the base ends of respective water pipes, each of which has a water supply section connected to a distal end thereof, for branching and supplying water supplied from a water main to each water supply section. An air supply device for supplying compressed air to the inside of itself and pressurizing the water to discharge water in the water pipe to each water supply unit side is provided. header. 6. The header according to claim 5, further comprising a valve section for opening and closing compressed air supplied by the air supply device.