JP2009293250A - Drain system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain system which prevents pressure fluctuation in a drain vertical pipe to prevent the breakage of trap sealing in a water-processing facility and drain obstructions, such as abnormal noises. <P>SOLUTION: According to the drain system, a drain vertical pipe 1 having an offset portion 12 is disposed to penetrate slabs 101 at respective stories of a multilayer building 10. At the story A where the offset portion 12 is located, a vent pipe 2 is fitted to the drain vertical pipe 1 to form a bypass that connect the upstream side of the offset portion 12 to the downstream side of the same between upper and lower slabs 101. A connecting portion of the vent pipe 2 connected to the upstream side of the offset portion 12 is provided with a vent joint 3 having a shunt means that splits apart flowing down drainage and vent flow. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a drainage system in a multi-story building.

  Conventionally, in buildings such as multi-storied apartment buildings, the drainage system has a method in which drainage from each floor is joined to a drainage vertical pipe that runs through each floor, falls to the ground or the basement, and drains outside the building. It is taken. Regarding the drainage merging method for each floor, more specifically, facility drainage pipes (horizontal drainage pipes) that are installed horizontally on the floor slab for each floor or for each residential unit on each floor are connected to the drainage vertical pipe at right angles. In many cases, wastewater collected from water facilities such as kitchens and washstands joins drainage pipes.

  However, in this merging method, the drainage from the opening of the drainage standpipe is accelerated by free fall from the upper floor, and the drainage from the opening joins at a low speed, and the speed difference between the drainage from the upper floor and the drainage from that floor. If it is large, the fall of the drainage is hindered at the junction, and a mass of drainage (water column) is formed. Further, in the horizontal drainage pipe, in addition to the difference in drainage speed, a jumping phenomenon occurs due to the change in direction of drainage, and the ventilation path in the horizontal drainage pipe is cut off. As a result, the inside of the piping was partially filled and blocked, causing pressure fluctuations in the drainage vertical pipe, which could cause drainage problems such as trap breakage and abnormal noise in the water supply equipment. .

  In recent apartments, the floor plan is often designed differently on the upper and lower floors, and it is not uncommon for the installation positions of sanitary facilities to be different between the upper and lower floors. Then, the pipe position of the drainage vertical pipe may be different between the upper floor and the lower floor, and by connecting the drainage vertical pipe to the drainage vertical pipe in the pipe space on the middle floor, There are many pipe forms having a so-called offset portion in which the axial center position is shifted on a plane. Even in such a case, in the drainage standpipe, the change in direction of the drainage at the offset portion may induce a jumping phenomenon of the drainage, which may cause the same pressure fluctuation as described above.

  In order to solve such a problem, there is a measure for enlarging the diameter of the pipe itself to increase the cross-sectional area of the air flow in the pipe, and it is possible to prevent the occurrence of excessive pipe pressure. However, increasing the pipe diameter also increases the necessary piping space, which is disadvantageous from the viewpoints of workability and economy. Therefore, a ventilation pipe is connected to a main point of the drainage pipe to promote air circulation in the pipe and eliminate the uneven pressure in the pipe.

  For example, in Patent Document 1, horizontal drainage pipes arranged on the upper and lower floors of a house are connected to each other via a drainage vertical pipe, and a vent pipe is branched from the horizontal drainage pipe on the upper floor. Thus, a structure of a ventilation pipe that is joined to a horizontal drainage pipe on the lower floor is disclosed.

Conventionally, as shown in FIG. 7 and FIG. 8, this type of ventilation pipe is connected to a drainage junction 91 where drainage pipes merge on the upper floor, and is temporarily raised upward to ensure ventilation. Therefore, the floor slab 94 on the upper floor is penetrated to the lower floor. As a result, even if the ventilation is interrupted due to the full state in the drainage vertical pipe 90 and the pressure fluctuation can occur, the air flows through the ventilation pipe 92 and the pressure fluctuation in the drainage vertical pipe 90 is generated. It has become a mechanism that can be suppressed. As described in Patent Document 1, the same applies to a drainage system in which a horizontal drainage pipe is used and also in the case of a pipe configuration having an offset portion 95 in a drainage vertical pipe 90.
JP 2001-164621 A

  In the conventional vent pipe piping configuration as described above, the vent pipe is disposed by penetrating the slab. Therefore, not only the through hole for the drainage stand pipe is provided in the slab, but also the through hole for the vent pipe must be provided in the slab. I had to. However, there have been cases in which through holes are not provided in the slab or ventilation pipes cannot be provided due to restrictions on the strength of the building slab or restrictions on the piping space in the pipe space. In addition, piping through the slab increases the number of piping man-hours, piping members, and the like, resulting in an inevitable increase in cost.

  Therefore, the present invention has been made in view of the above problems, and in providing a drainage stand in a multi-layer building, even when there is an offset portion, a good ventilation channel is ensured. It is intended to provide a drainage system capable of constructing a drainage environment, preventing pressure fluctuations in the drainage vertical pipes, and preventing drainage failures such as trap breakage and abnormal noise of water supply equipment.

  In order to achieve the above-described object, the drainage system according to the present invention has drainage stand pipes penetrating through the slabs of each floor of a multi-layer building, and the drainage standpipe has at least a part of its axis. It is piped with offset portions at different planar positions. Further, a vent pipe is connected to the drainage vertical pipe on the floor with the offset portion, and the vent pipe bypasses the upstream side and the downstream side of the offset portion on the floor and does not pass the slab between the upper and lower slabs. It is arranged. And the connection part of the ventilation piping connected to the upstream of the said offset part is provided with the ventilation joint provided with the diversion means which isolate | separates the waste_water | drain which flows down, and a ventilation flow.

  According to such a configuration of the present invention, even if the drainage standpipe has an offset portion and a drainage failure is likely to occur due to pressure fluctuation, a ventilation pipe is provided through a ventilation joint provided with a flow dividing means. As a result, a ventilation channel can be secured before and after the offset portion, so that a drainage failure can be avoided. In addition, since this ventilation pipe is arranged without penetrating the slab between the upper and lower slabs, it does not impair the slab strength or limit the piping space, and also increases the number of pipes and the number of members. This makes it possible to build a good drainage environment.

  Further, in the drainage system having the above-described configuration, the vent joint includes a connection port connected to the vent pipe, and a rectifying member is provided as the diversion means above the connection port. It is characterized by preventing drainage from flowing into the ventilation pipe from the mouth and allowing the drainage to flow down to the drainage standpipe.

  Thereby, the waste water that has flowed down the drainage pipe flows down so as to avoid the ventilation pipe in the ventilation joint, and therefore, the drainage can be drained in a state in which a ventilation channel connected to the ventilation pipe is secured in the drainage pipe. Therefore, when the drainage flows into the offset portion, it is possible to prevent a large pressure fluctuation, and the drainage can be smoothly performed without causing a ventilation failure.

  Further, in the drainage system having the above-described configuration according to the present invention, the rectifying member of the vent joint has a guide surface on which the draining water collides, and the guide surface is inclined with respect to the flow-down direction. It is a feature.

  Accordingly, since the drainage flows through the inclined guide surface in the vent joint, the drainage does not block the connection port to which the vent pipe is connected, and the vent channel can be secured satisfactorily.

  Furthermore, in the drainage system having the above-described configuration, the vent pipe in the floor with the offset portion has one end connected to the drainage stand pipe on the lower surface side of the upper slab via a vent joint, and the other end. The upper slab of the lower slab is connected to the drainage junction.

  This eliminates the need for a number of new members for installing ventilation pipes, and allows the connection between the ventilation pipes and the drainage vertical pipes to be stored in the ceiling pocket and under-floor space. Thus, it is possible to perform piping in a space-saving manner.

  According to the drainage system of the present invention configured as described above, in providing a drainage stand in a multi-story building, even if there is an offset portion, a good drainage environment is secured with a vent flow path secured. Thus, it is possible to prevent pressure fluctuation in the drainage vertical pipe and prevent drainage troubles such as trap breakage and abnormal noise of the water supply equipment. Further, the ventilation pipe can be provided without penetrating the slab, the number of work steps and the number of members can be reduced, and the slab strength can be maintained.

  Hereinafter, the best mode for carrying out the drainage system according to the present invention will be described with reference to the drawings.

  1 and 2 are schematic explanatory views schematically showing an example of the drainage system of the present invention. As shown in the figure, in the multi-story building 10, a drainage stand 1 is disposed from the upper floor to the lower floor through the slab 101 of each floor by a single pipe drainage system. In the penetration portion of the slab 101 on each floor, the drainage standpipe 1 is formed with drainage junctions 11 from various equipment and provided with junction junctions. Further, the drainage stand 1 (pipe 1) is piped with an offset portion 12 in the middle floor A.

  The offset part 12 is located in the plane position where the axial center of the drainage pipe 1 is different between the upper floor and the lower floor, so that these drainage can be used as a horizontal or diagonal pipe through a bent joint or the like on the intermediate floor A. The vertical pipes 1 are connected to each other and piped in an offset form. The piping length in the offset part 12 is variously set according to the form of the living room. The drain part 1 is connected to the offset part 12 in FIG. 1 using a horizontal pipe. The drainage stand 1 is connected to the offset part 12 in FIG. 2 using an oblique pipe.

  On the middle floor A where such an offset portion 12 is located, a vent pipe 2 is connected to the drainage standpipe 1. The ventilation pipe 2 is piped so as to bypass the upstream side and the downstream side of the offset portion 12. In addition, the ventilation pipe 2 is disposed within the floor height of the intermediate floor A without passing through the slabs 101 between the upper and lower slabs 101. The starting end of the ventilation pipe 2 is connected to the drainage stand 1 immediately after penetrating through the upper slab 101 on the upstream side of the offset portion 12, and is piped in the vertical direction once raised upward. The end of the ventilation pipe 2 is connected to the drainage junction 11 where the drainage pipes on the middle floor A gather on the downstream side of the offset part 12.

  A vent joint 3 is provided at a connection portion between the vent pipe 2 and the drainage pipe 1 on the upstream side of the offset portion 12. That is, in the illustrated embodiment, the ventilating joint 3 is provided in the drainage pipe 1 immediately after passing through the upper slab 101 on the upstream side of the offset portion 12 in the intermediate floor A. The vent joint 3 includes a diversion unit that separates the drainage flowing down the drainage stand 1 and the vent flow in the drainage stand 1.

  3 to 6 are examples of the vent joint 3, FIG. 3 is a cross-sectional view, and FIGS. 4 to 6 are side views. The ventilation joint 3 is provided with vertical pipe connection ports 31 and 31 connected to the drainage vertical pipe 1 at the upper and lower sides, the side of the pipe body is branched, and the ventilation connection part 32 to which the ventilation pipe 2 is connected is formed. Has been.

  As shown in FIG. 3, the vent joint 3 is provided with a diversion means before the connection port 321 of the vent connection portion 32 on the inner wall surface of the pipe body. In the illustrated embodiment, the rectifying member 33 is provided at an upper position (directly above) in the vicinity of the connection port 321 as a diversion unit. The rectifying member 33 protrudes from the inner wall surface of the pipe body of the vent joint 3 and prevents the drainage from flowing into the vent pipe 2 from the connection port 321 via the vent connection portion 32. The drainage is caused to flow down to the drainage vertical pipe 1 while being guided so as to flow down in the pipe body.

  Moreover, in the illustrated form, the rectifying member 33 has a structure having a guide surface 33a on which drained water collides. The guide surface 33a is a surface that is inclined with respect to the direction in which the drainage flows. The rectifying member 33 may be integrally formed with the ventilation joint 3 or may be formed by another member and integrally provided by adhesion, bonding, or the like.

  In the drainage stand 1 of the single-pipe drainage system, the drainage usually flows down the pipe wall in the drainage stand 1. Therefore, a part of the waste water flowing into the vent joint 3 flows down the tube wall as it is, and a part of the drainage is changed in the flow direction by the rectifying member 33. That is, since the air flow coupling 3 is provided with the rectifying member 33, the drainage collides with the guide surface 33 a of the rectifying member 33 at the upper part of the front side of the connection port 321 of the vent connection portion 32, thereby connecting the vent connection portion 32. It flows down so as to avoid the mouth 321. For this reason, the drainage does not flow in the direction of the vent connection portion 32, and the drainage can flow down in a state where a vent channel is secured in the vicinity of the connection port 321. Incidentally, if this rectifying member 33 is not provided, the drainage that has flowed along the inner wall surface of the tube main body covers the connection port 321 in a curtain shape and closes the ventilation channel.

  There are a plurality of variations in the form of the flow regulating member 33. For example, in the ventilation joint 3 shown in FIG. 4, the rectifying member 33 is a plate-like portion provided immediately above the connection port 321 of the ventilation connection portion 32 and inclined in an oblique direction with respect to the tube axis of the ventilation connection portion 32. It is formed of a member, and the guide surface 33a is inclined obliquely downward from the left side to the right side in the drawing. The inclined guide surface 33a receives and collides with the drainage flowing down from the drainage pipe 1, and has an action of flowing down the drainage so as to be divided into the left and right sides of the connection port 321 as indicated by arrows in the figure. Eggplant. As a result, the drainage does not block the connection port 321, and a ventilation channel can be secured and a smooth air flow can be obtained.

  In the form shown in FIG. 5, the rectifying member 33 of the ventilation joint 3 is formed in a substantially triangular wedge shape in a side view, and the guide surface 33a is provided so as to be inclined obliquely downward from the left side to the right side in the drawing. As a result, the drainage flowing down along the pipe wall of the drainage vertical pipe 1 collides with the guide surface 33a and flows down substantially to the right and flows so as to avoid the connection port 321. Therefore, drainage does not block the ventilation connection port 32, and a ventilation channel can be secured.

  In the form shown in FIG. 6, the rectifying member 33 of the ventilation joint 3 is formed in a substantially triangular shape in a side view, and the guide surfaces 33 a and 33 a are provided so as to form a mountain shape. Although not shown, the guide surface 33a of the rectifying member 33 may be formed in a substantially trapezoidal shape in a side view. By such a rectifying member 33, the drainage flowing down from the drainage stand 1 collides with either the left or right guide surface 33 a and flows down so as to be divided into the left and right side portions of the connection port 321.

  Such a rectifying member 33 has a disposition length of about 2/3 or more with respect to the diameter of the vent connection portion 32 and protrudes like a bowl inside the vent joint 3. Moreover, it is preferable that the protrusion amount from the pipe wall of the rectifying member 33 is provided at a ratio of about 1/6 to 1/4 with respect to the diameter of the drainage vertical pipe 1. For example, when the diameter of the drainage stack 1 is 100 mm, the rectifying member 33 is preferably provided in the vent joint 3 with a protruding amount of about 15 to 25 mm. Moreover, it is preferable that the guide surface 33a of the rectifying member 33 has an inclined surface that forms an angle of 20 ° to 50 ° with respect to the horizontal plane.

  By the drainage system configured as described above, the vent pipe 2 is provided without penetrating the slab 101 with respect to the drainage pipe 1 having the offset portion 12, and the venting failure of the entire drainage system is surely prevented. Will be able to. As a result, it is possible to prevent a drainage failure in the drainage standpipe 1 and provide a good living environment.

  Next, an embodiment of the drainage system according to the present invention will be described. In this embodiment, the present invention was implemented as a single-pipe drainage system in a 17-story high-rise building, and the case where the drainage stand had an offset portion on the seventh floor was verified. In the seventh floor portion, upstream and downstream of the offset portion, a ventilation pipe is disposed without penetrating the slab and is connected by a ventilation joint. The ventilation joint is provided with a rectifying member having a predetermined guide surface.

  Drainage from the 17th, 16th, and 15th floors is a steady flow with a total drainage flow rate of 2.5L / s, 2.5L / s, and 1.0L / s, and a HASS218-1999 apartment house. The test results shown in Table 1 were obtained by the drainage test based on the drainage capacity test method of the drainage vertical pipe system. Judgment conditions were based on the measurement of the pressure fluctuation value in the drainage vertical pipe from the 2nd floor to the 16th floor.

表１に示すように、実施例１では、通気継手における整流部材は、通気接続部の接続口（管内壁における側面の開口）の直上部に設けられて、ガイド面の角度が水平面に対して２０°であり、管内壁からの突出量が２０ｍｍで、通気接続部による管本体における開口（前記接続口３２１の開口の口径）に対して２／３の配設長さで形成されている。

As shown in Table 1, in Example 1, the rectifying member in the vent joint is provided immediately above the connection port of the vent connection portion (opening on the side surface of the pipe inner wall), and the angle of the guide surface is relative to the horizontal plane. It is 20 °, the amount of projection from the inner wall of the pipe is 20 mm, and is formed with a length of 2/3 with respect to the opening (the diameter of the opening of the connection port 321) in the pipe body by the vent connection portion.

  In Example 2, the flow straightening member in the vent joint has a guide surface angle of 50 ° with respect to the horizontal plane, a protruding amount from the inner wall of the pipe of 20 mm, and a length equivalent to the opening by the vent connection portion. Is formed.

  Further, in Example 3, the rectifying member in the vent joint has an angle of the guide surface of 30 ° with respect to the horizontal plane, a protruding amount from the inner wall of the pipe of 25 mm, and a length equivalent to the opening by the vent connection portion. It is formed with installation length.

  On the other hand, in Comparative Example 1, the rectifying member in the vent joint is formed so that the angle of the guide surface is equal to the horizontal plane, the amount of protrusion from the inner wall of the pipe is 5 mm, and 2/3 of the opening by the vent connection portion. It is formed with installation length.

  In Comparative Example 2, the rectifying member in the vent joint has an angle of the guide surface of 80 ° with respect to the horizontal plane, the amount of protrusion from the inner wall of the pipe is 40 mm, and is 1/3 of the opening by the vent connection portion. The thing only with arrangement | positioning length is used.

  In principle, the test determination conditions require that the system maximum value / minimum value of the in-pipe pressure be within ± 400 Pa. As shown in Table 1, Example 1 to which the drainage system according to the present invention was applied. In -3, the result of the favorable pressure fluctuation value was obtained in any case. On the other hand, in Comparative Examples 1 and 2, it was shown that the pressure range exceeded ± 400 Pa and the pressure fluctuation in the tube was increased.

  Therefore, according to the first to third embodiments of the drainage system according to the present invention, when the drainage stand pipe is provided in the multi-layered building, the pressure fluctuation in the drainage standpipe can be suppressed even when there is an offset portion. It is possible to construct an environment and prevent drainage troubles such as trap breakage and abnormal noise in water facilities.

  The present invention can be suitably used as a single-pipe drainage system in a multi-story building.

It is a schematic explanatory drawing which shows typically an example of the drainage system of this invention. It is a schematic explanatory drawing which shows typically the other example of the drainage system of this invention. It is sectional drawing which shows the example of the ventilation joint in the drainage system which concerns on this invention. It is a side view which shows the ventilation joint in this invention. It is a side view which shows the other form of the said ventilation joint. It is a side view which shows the other form of the said ventilation joint. It is a schematic explanatory drawing which shows an example of the conventional drainage system typically. It is a schematic explanatory drawing which shows an example of the conventional drainage system typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drainage pipe 11 Drainage merge part 12 Offset part 2 Ventilation piping 3 Venting joint 31 Vertical pipe connection port 32 Ventilation connection part 321 Connection port 33 Rectification member 33a Guide surface 10 Multi-story building 101 Slab

Claims (4)

  A drainage stand pipe is disposed through the slab of each floor of the multi-layer building, and the drainage stand pipe is piped at least partially with an offset portion having a different plane center of its axis, On the floor with the offset portion, a vent pipe is connected to the drainage vertical pipe. The vent pipe bypasses the upstream side and the downstream side of the offset portion on the floor and does not pass through the slab between the upper and lower slabs. A drainage system comprising a ventilating joint provided with a flow dividing means for separating the drained water flowing down and the ventilating flow at a connecting portion of the venting pipe connected to the upstream side of the offset portion. The drainage system according to claim 1,
The vent joint includes a connection port connected to the vent pipe, and a rectifying member is provided above the connection port as the diversion means. The rectifier member allows drainage to flow into the vent pipe from the connection port. A drainage piping system characterized by blocking and allowing drainage to flow down to a drainage standpipe. The drainage system according to claim 2,
The rectifying member has a guide surface on which drained water collides, and the guide surface is provided to be inclined with respect to the downstream direction. In the drainage system according to any one of claims 1 to 3,
The vent pipe on the floor with the offset part has one end connected to the drainage stand pipe on the lower surface side of the upper slab via a vent joint and the other end connected to the drainage junction part on the upper surface side of the lower slab. Drainage system characterized by being.

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