JP2008267040A - Piping structure for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure for drainage by which the water inside a pipe hardly splashes out of the pipe even when a large amount of rainwater etc. flows down in a vertical main pipe accompanying a large amount of air, and a belching sound of the air inside the pipe is reduced. <P>SOLUTION: In the piping structure for drainage, branch pipes are connected to the vertical main pipe 1 at a plurality of vertical positions in a communicating manner so that the water flowing from each of the branch pipes into the vertical main pipe may be drained through a horizontal main pipe. A cylindrical body 9 including a large diameter section 8 having an inner diameter larger than an outer diameter of the vertical main pipe is connected to a lower end side of the vertical main pipe in a communicating manner. The horizontal main pipe is connected to the lower part of the cylindrical body in a communicating manner, and a communicating path 11 communicating the inside of the cylindrical body with the outside thereof is opened to the cylindrical body at the part higher than a lower end opening 12 of the vertical main pipe. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drainage piping structure in which branch pipes are connected to a plurality of vertical positions of a standing main pipe, and water that has flowed into the standing main pipe from each of the branch pipes can be drained through a horizontal main pipe. .

In the above drainage piping structure, conventionally, the lower end portion of the vertical main pipe and the horizontal main pipe are directly connected to each other through an elbow joint or the like, and when a large amount of rain water or the like flows down the vertical main pipe with a large amount of air, In the downstream portion of the standing main pipe, the air in the pipe is compressed and the air pressure easily rises, and the phenomenon in which the water in the pipe flows back through the branch pipe easily occurs due to the air pressure.
In order to prevent this phenomenon, the air in the pipe in the downstream part of the standing main pipe should be released to the outside of the pipe to suppress the rise in air pressure. Was limited (it is a well-known and conventional technique and cannot disclose appropriate prior art document information).

For this reason, there is a drawback that the water in the pipe flows into the branch pipe together with the air in the pipe and easily jumps out of the pipe from its upstream opening, and in particular, the air pressure increases as the horizontal main pipe approaches the full flow state, There is a drawback that the blowing sound when the air is blown out of the pipe from the upstream side opening of the branch pipe tends to increase.
The present invention has been made in view of the above circumstances, and even if a large amount of rainwater or the like flows down the standing main pipe with a large amount of air, it is difficult for the water in the pipe to jump out of the pipe and to blow out the air in the pipe. It aims at providing the piping structure for drainage with a low sound.

  In the first characteristic configuration of the present invention, branch pipes are connected to a plurality of locations in the vertical direction of the standing main pipe, and water that has flowed into the standing main pipe from each of the branch pipes can be drained through the horizontal main pipe. In the drainage piping structure, a cylindrical body having a large-diameter portion having an inner diameter larger than the outer diameter of the standing main pipe is connected to the lower end side of the standing main pipe, and the cylindrical body is connected to the lower portion of the cylindrical body. A horizontal main pipe is connected in communication, and a communication path that communicates the inside and outside of the cylindrical body is opened in a cylindrical body portion at a position higher than the lower end opening of the standing main pipe.

[Action and effect]
Since the cylindrical body having a large-diameter portion whose inner diameter is larger than the outer diameter of the vertical main pipe is connected to the lower end side of the vertical main pipe, and the horizontal main pipe is connected to the lower portion of the cylindrical body, A large space is secured inside the cylindrical body, and even if a large amount of rainwater flows down at a time, an increase in air pressure can be suppressed, and a communication passage that communicates the inside and outside of the cylindrical body is provided. The inside air of the pipe, in which the increase in air pressure is suppressed, can be efficiently released to the outside of the pipe through the communication path, so that the air inside the pipe does not easily flow into the branch pipe, and the air pressure inside the cylindrical body increases. Therefore, even when the horizontal main pipe approaches a full flow state, the blowing sound when the air in the pipe blows out of the pipe through the communication path is reduced.
Then, the communication passage is opened in the cylindrical body portion positioned higher than the lower end opening of the standing main pipe, and the air in the pipe in which the increase in air pressure is suppressed can be released outside the pipe through the communication path. Is difficult to flow into the communication path together with the air in the pipe.
Therefore, even if a large amount of rainwater or the like flows down the standing main pipe with a large amount of air, the pipe water does not easily flow into the branch pipe and the communication path together with the pipe air. In addition, it is difficult to jump out of the pipe from the communication path, and even when the horizontal main pipe approaches a full flow state, the sound of the air in the pipe from the communication path is small.

  The second characteristic configuration of the present invention is that the lower end side of the standing main pipe is inserted so as to protrude inside the cylindrical body.

[Action and effect]
Since the lower end side of the standing main pipe protrudes into the inside of the cylindrical body, the communication path can be opened in the space between the standing main pipe and the cylindrical body. The movement direction of the pipe water flowing out into the tubular body and the movement direction of the pipe air flowing into the communication path from the cylindrical body are substantially opposite to each other, and the inflow of the pipe water into the communication path can be effectively prevented.

  The 3rd characteristic structure of this invention exists in the point which has comprised the said communicating path with the through-hole formed in the said cylindrical body part.

[Action and effect]
The through-hole formed in the cylindrical body part forms a communication path that connects the inside and outside of the cylindrical body, so that the air in the pipe can be released outside the pipe without particularly connecting a vent pipe, etc. The structure can be simplified.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 shows a drainage piping structure according to the present invention provided in a medium- and high-rise house A such as an apartment, and a cylindrical resin drainage standpipe 1 is piped along a substantially vertical direction. A cylindrical resin horizontal drain pipe 2 is connected to the lower end side of the pipe with a water gradient and connected to a plurality of vertical positions of the vertical main pipe 1, that is, below the veranda B provided for each level. A cylindrical resin drainage branch pipe 3 is connected to a side portion through a branch joint 4 with a water gradient.
In addition, you may comprise all or one part of the standing main pipe 1, the horizontal main pipe 2, and the branch pipe 3 with the metal pipe.

  Then, the upper end side of the stand main pipe 1 is connected to the roof drain 5 and the upper end of each branch pipe 3 is connected to each veranda drain 6 to flow into the stand main pipe 1 from the veranda B or the roof floor C. The rainwater thus drained is made to flow through the horizontal main pipe 2 into the water collecting basin 7 so that it can be drained.

  A circular cylindrical body 9 having a large-diameter portion 8 having an inner diameter larger than the outer diameter of the standing main pipe 1 is concentrically connected to the lower end side of the standing main pipe 1 as shown in FIG. The horizontal main pipe 2 is connected to the lower part of the cylindrical body 9 through an elbow joint 10 in a connected manner.

  The cylindrical body 9 is configured by concentrically screwing and connecting an upper cylindrical body 9a in which the communication passage 11 is opened and a lower cylindrical body 9b in which the horizontal main pipe 2 is connected in communication. The upper end of the body 9a is formed so that its inner diameter is about 1.2 to 1.5 times larger than the outer diameter of the standing main pipe 1, and the standing main pipe 1 is inserted into the inside of the standing main pipe 1. A cap 13 that closes the gap between the upper cylindrical body 9a and a rubber O-ring 14 is screwed into the upper cylindrical body 9a.

And the communicating path 11 which connects the inside and outside of the cylindrical body 9 is opened by the upper cylindrical body 9a which is a cylindrical body part of the position higher than the lower end opening 12 of the standing main pipe 1.
That is, an annular space 15 is formed between the standing main pipe 1 and the tubular body 9 by concentrically entering the lower end side of the standing main pipe 1 so as to protrude inside the lower tubular body 9b. A double-pipe structure is provided, and the communication path 11 is opened above the space 15.

  The communication passage 11 is provided at a branch connection portion 16 provided in the upper cylindrical body 9a by connecting a ventilation pipe 19 communicating with external air downwardly through a short pipe 17 and an elbow joint 18 downward. is there.

The cross-sectional area of the space 15 in the cylinder radial direction is preferably larger than the cross-sectional area of the vertical main pipe 1 in the pipe radial direction, and the vertical main pipe 1 having a nominal diameter of 75φ (inner diameter 77 mm, outer diameter 89 mm) is provided. In this case, it is preferable to provide a cylindrical body 9 having an inner diameter of 125 mm for the large-diameter portion 8, but if the standing main pipe 1 having a nominal diameter of 100φ (inner diameter: 100 mm, outer diameter: 114 mm) is provided, the large-diameter portion A cylindrical body 9 having an inner diameter of 146 mm may be provided.
In any case, the depth of penetration of the standing main pipe 1 into the cylindrical body 9 is preferably about 600 mm.
In forming the piping structure, a screw connection method is used in the present embodiment, but an adhesive method in which resin materials are joined with a dedicated adhesive may be used.

[Second Embodiment]
FIG. 3 shows another embodiment of the present invention, and instead of the communication passage 11 formed by providing the ventilation pipe 19 shown in the first embodiment, a through hole is formed in the upper tubular body 9a of the tubular body 9. A plurality of rectangular window holes 20 are formed in the cylindrical circumferential direction to form a communication passage 11 that communicates the inside and the outside of the cylindrical body 9, and each rectangular window hole 20 is formed in an umbrella shape at intervals in the cylinder radial direction. A surrounding cover 21 is provided integrally with the cap 13.
Other configurations are the same as those of the first embodiment.

[Third Embodiment]
FIG. 4 shows another embodiment of the present invention, in which a circular cylindrical body 9 is integrally connected to the lower end side of the standing main pipe 1 and a space 15 between the standing main pipe 1 and the cylindrical body 9 is connected. A communication passage 11 that opens to a cylindrical body portion at a position higher than the lower end opening 12 is provided near the same position as the lower end opening 12 of the standing main pipe 1.

  That is, the standing main pipe 1 is composed of the upper standing main pipe portion 1a, the short pipe portion 1b, and the connecting pipe portion 1c that connects the lower end side of the upper standing main pipe portion 1a and the short pipe portion 1b, and the connecting pipe portion 1c. A cylindrical body 9 is integrally extended at the lower end of the short tube portion 1b so that the short tube portion 1b protrudes into the cylindrical body 9 in a concentric manner.

  The upper standing main pipe portion 1a, the connecting pipe portion 1c, and the short pipe portion 1b are connected concentrically to each other by welding, and the short pipe portion 1b is welded to the inner surface side of the connecting pipe portion 1c. The short tube 22a is composed of a second short tube 22b welded to the first short tube 22a.

The communication passage 11 is formed by connecting and connecting an upward L-shaped vent pipe 19 to the cylindrical body 9 in a side view, and an upward opening 23 is provided at an upper end portion of the vent pipe 19 with a space therebetween. A cover 24 is fixed.
Other configurations are the same as those of the first embodiment.

[Fourth Embodiment]
FIG. 5 shows another embodiment of the present invention, in which the circular cylindrical body 9 is composed of a cylindrical portion 25a and a lid portion 25b that closes the upper end opening thereof, and the lower end portion of the standing main pipe 1 is inserted into the lid portion 25b. While being fixed by welding, one end side of the downward U-shaped vent pipe 19 forming the communication path 11 is inserted and fixed to the lid portion 25b to fix the communication path 11 from the lower end opening 12 of the standing main pipe 1. Is also opened in the cylindrical body portion at a higher position.
Other configurations are the same as those of the first embodiment.

[Other Embodiments]
In the drainage piping structure according to the present invention, a rectangular tubular body may be concentrically connected to the lower end side of the standing main pipe.

Side view of drainage piping structure The longitudinal section of the important section showing a 1st embodiment Longitudinal sectional view of the main part showing the second embodiment Longitudinal sectional view of the main part showing the third embodiment Longitudinal sectional view of the main part showing the fourth embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Standing main pipe 2 Horizontal main pipe 3 Branch pipe 8 Large diameter part 9 Cylindrical body 11 Communication path 12 Lower end opening 15 Space 20 Through-hole

Claims (3)

Branch pipes are connected in communication at multiple locations in the vertical direction of the main pipe,
A drainage pipe structure in which water flowing into the standing main pipe from each of the branch pipes can be drained through a horizontal main pipe,
A cylindrical body having a large-diameter portion whose inner diameter is larger than the outer diameter of the standing main pipe is connected to the lower end side of the standing main pipe, and the horizontal main pipe is connected to a lower portion of the cylindrical body. With
A drainage piping structure in which a communication passage communicating between the inside and the outside of the cylindrical body is opened in a cylindrical body portion at a position higher than a lower end opening of the standing main pipe.   The drainage piping structure according to claim 1, wherein a lower end side of the standing main pipe is inserted so as to protrude inward of the cylindrical body.   The drainage piping structure according to claim 1 or 2, wherein the communication path is constituted by a through hole formed in the cylindrical body portion.

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