JP2005299185A - Draining pipe member and draining pipe system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a draining pipe member which prevents excessive positive pressure due to draining current flowing from a main down pipe to a main horizontal pipe, simplifies a piping structure, makes a pipe space compact, and contributes to cost reduction of the piping, and to provide a draining pipe system. <P>SOLUTION: The draining pipe member has a pipe body 2 formed of an upper pipe connecting section 4, a lower pipe connecting section 6, and a branch pipe connecting section 8 arranged between both the connecting sections. In the pipe body 2, the lower pipe connecting section 6 has a nominal diameter larger than that of the upper pipe connecting section 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drainage piping member and a drainage pipe system.

A drain pipe system adopted in a high-rise building or the like has a structure in which a standing main pipe is set up through each level, and a horizontal main pipe is connected to a lower end portion of the standing main pipe through a leg bend. This horizontal main pipe is provided under the floor of the lowest floor of the building (not limited to the first floor of the building, but the lowest hierarchy in the range where it is set up as the main pipe). The standing main pipe is provided with drainage piping members corresponding to each level, and horizontal branch pipes piped at each level are connected to these individual drainage piping members.
However, the side branch pipes that are piped at the lowest floor closest to the height position where the horizontal main pipe is installed should not be connected directly to the vertical main pipe, but should be piped alone until drainage or on the horizontal main pipe It is preferable that a sufficient distance is secured from the vertical main pipe to join (see Non-Patent Document 1). This is because a large positive pressure is generated in the vicinity of the bottom floor of the standing main pipe during drainage, and there is a danger of trapping out.

By the way, the present applicant has proposed that the nominal diameter of the horizontal main pipe (the nominal value of the diameter of the piping material) is enlarged at the connecting portion from the leg bend to the horizontal main pipe or immediately downstream thereof (for example, a patent) Reference 1 and 2 etc.). By expanding the diameter of such a horizontal main pipe, the detergent contained in the drainage flow is prevented from foaming and blocking the upper ventilation space in the pipe, thereby preventing the generation of excessive positive pressure.
“6.2.2.7 Bottom drainage horizontal branch pipe” on page 81 of “Standards for Water Supply and Drainage Sanitary Equipment / Commentary” (HASS206-2000) Japanese Patent No. 2726671 JP-A-11-166253

  Do not connect the bottom branch pipe to the vertical main pipe, connect it to the drain alone, or use a piping structure that allows a sufficient distance from the vertical main pipe to join the horizontal main pipe. The number increases, and there may be a need to add a dedicated vent pipe. Not only for horizontal main pipes but also for vertical main pipes, it is necessary to expand the pipe space, extending the construction period and increasing piping costs (material costs and work costs). Various problems have arisen, such as a negative pressure is easily generated in the branch pipe, leading to a breakage, and maintenance is difficult due to a small pipe diameter. Therefore, there was a strong need to avoid these problems.

On the other hand, in the method of expanding the diameter of the horizontal main pipe at the connection portion from the leg bend to the horizontal main pipe or immediately downstream thereof, although it is an experimental value, there is a possibility that an excessive positive pressure is rarely generated. This is because when the vigorous drainage flow that has flowed down the main pipe is changed in direction by the leg bend, turbulence tends to occur here, and in some cases, the upper ventilation space in the pipe may be blocked. This phenomenon can occur even when there is no foaming due to the detergent component.
The present invention has been made in view of the above circumstances, and it is possible to reliably prevent excessive positive pressure from being generated by the drainage flow flowing from the vertical main pipe to the horizontal main pipe, while simplifying the piping structure and compacting the pipe space. It is an object of the present invention to provide a drainage piping member and a drainage pipe system that can reduce the cost of piping (member costs and work costs).

In order to achieve the above object, the present invention has taken the following measures.
That is, the drainage piping member according to the present invention has a pipe body provided with an upper pipe connection part and a lower pipe connection part, and a branch pipe connection part located between the two connection parts. In the pipe body, the nominal diameter of the lower pipe connection portion is larger than that of the upper pipe connection portion.
With such a configuration, it is possible to smooth the flow of the drainage flow that flows down from the vertical main pipe (upstream side of the branch pipe connection portion) and flows to the horizontal main pipe. Further, the drainage flow that merges from the branch pipe connection can also be smoothly merged. In addition, since the tube capacity is substantially increased in the tube body, it is difficult for positive pressure to be generated. For these reasons, the generation of excessive positive pressure can be prevented. In addition, since the diameter of the pipe itself is increased, there is no need to use an increase (different diameter pipe), and there is no problem that the pipe space is not fit and the cost is increased.

The position where the nominal diameter is increased in the pipe main body may be between the upper pipe connection part and the branch pipe connection part or between the branch pipe connection part and the lower pipe connection part.
Further, the water collecting chamber may be formed on the pipe main body so as to correspond to the portion where the branch pipe connecting portion is provided. This water collection chamber is formed such that the inside thereof is larger in diameter than the nominal diameter of the upper pipe connection portion and the lower pipe connection portion. Needless to say, even in this case, it is assumed that the nominal diameter of the lower pipe connection portion is larger than that of the upper pipe connection portion.
The pipe body may be formed as a joint structure in which a part including the lower pipe connection part and a part not including the lower pipe connection part are formed as separate members, and the two parts are coupled. If it does in this way, the protrusion to the side can be made small at least one of the part containing the connection part for lower pipes, or the part which does not contain the connection part for lower pipes. Therefore, when installing this pipe body through the floor slab, the installation hole provided in the floor slab can keep the sleeve diameter (hole diameter) small according to the portion with the smaller bulge.

On the other hand, the drain pipe system according to the present invention includes a vertical main pipe, a leg bend provided at a lower end portion of the vertical main pipe, a horizontal main pipe provided via the leg bend, and the vertical main pipe. A branch pipe connecting portion for the lowest floor provided at a height position close to the leg bend. And the nominal diameter in the inflow part to the said leg bend is formed larger diameter compared with the nominal diameter of the standing main pipe which becomes upstream from the said connection part for branch pipes.
In addition, such a drainage pipe system can be configured using the drainage piping member according to the present invention, and can also be configured by combining various types of piping members without using the drainage piping member.

  In the drainage piping member and drainage pipe system according to the present invention, the piping structure is simplified and the pipe space is made compact while reliably preventing excessive positive pressure from being generated by the drainage flow flowing from the vertical main pipe to the horizontal main pipe. It is possible to reduce the piping cost (material cost and work cost).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of a drainage piping member 1 according to the present invention. This drainage piping member 1 is mainly composed of a pipe body 2, and is connected to the pipe body 2 for connecting the upper pipe 3 (hereinafter referred to as “upper pipe connection section”) 4 and the lower pipe 5. A connection part (hereinafter referred to as “lower pipe connection part”) 6 and a connection part for horizontal branch pipe 7 (hereinafter referred to as “branch pipe connection part”) 8 are provided.
When the pipe body 2 is put in a standing state, the upper pipe connecting portion 4 is positioned at the upper portion of the pipe main body 2 and serves as a drainage flow inlet, and the lower pipe connecting portion 6 is positioned at the lower portion of the pipe main body 2. The branch pipe connection portion 8 is positioned between the upper and lower connection portions 4 and 6 and is turned sideways to serve as a drainage flow inlet. Note that the branch pipe connecting portion 8 is not limited to the horizontal direction, and may be diagonally upward or laterally through an offset. In the present embodiment, the upper pipe 3 corresponds to a standing main pipe, and the lower pipe 5 corresponds to a leg bend. A horizontal main pipe 10 is connected to the lower pipe 5 (leg bend).

Further, the horizontal branch pipe 7 is piped on the lowest floor of the building (not limited to the first floor of the building, but at the lowest level in the range where it stands as a standing main pipe). In the pipe body 2 in the first embodiment, only one (one) branch pipe connection portion 8 is shown. However, this is not particularly limited, and may be two-way, three-way, or four-way. Also good.
A water collection chamber 12 is formed in the pipe body 2 so as to correspond to a portion where the branch pipe connection portion 8 is provided. The interior of the water collection chamber 12 is an upper pipe connection portion 4, a lower pipe connection portion 6, and a branch pipe use. It is formed wider than any nominal diameter of the connecting portion 8.

Since such a water collecting chamber 12 is provided, an enlarged-diameter portion 13 having an enlarged internal width is formed between the upper pipe connection portion 4 and the branch pipe connection portion 8, and the branch pipe connection is also provided. A reduced diameter portion 14 whose internal width is reduced is formed between the portion 8 and the lower pipe connecting portion 6, and a space between the expanded diameter portion 13 and the reduced diameter portion 14 is formed thicker in the form of a dumbbell. Will be.
Since this drainage piping member 1 is for the lowermost floor, a state in which the water collecting chamber 12 protrudes onto the floor slab 20 on the lowermost floor (the side branch pipe 7 connected to the branch pipe connecting portion 8) Is installed on the floor slab 20, and the lower pipe connecting portion 6 is inserted into an installation hole 21 provided in the floor slab 20. The inside of the water collecting chamber 12 is formed as a simple cavity, and a swirling blade for imparting swirling to the drainage flow flowing down the upper pipe 3 (stand main pipe) and a drainage flow that merges from the side branch pipe 7 are piped. There is no need for a drift plate to run along the wall. Rather, in order to prevent generation of washing foam and excessive positive pressure due to turbulent flow in the drainage flow in the lower pipe 5 (leg bend) connected to the downstream side of the drainage piping member 1, these swirling There should be no blades or drift plates. Therefore, it is not provided in the first embodiment.

In the illustrated example, the upper pipe connecting portion 4 is used as a receiving port, and therefore the upper pipe 3 is inserted into the upper pipe connecting portion 4. Accordingly, the inner diameter of the upper pipe connecting portion 4 is formed to be large enough to fit the upper pipe 3, but when the upper pipe 3 is inserted, the upper pipe connecting portion 4 causes the flow of the drainage flow. The effective inner diameter is equivalent to that of the upper pipe 3 (stand main pipe). That is, the upper pipe connecting portion 4 and the upper pipe 3 have the same nominal diameter.
Further, in the illustrated example, the lower pipe connecting portion 6 is a straight outlet, so the lower pipe connecting portion 6 itself is inserted into the receiving port 23 provided at the upper end of the lower pipe 5. Accordingly, the inner diameter of the receiving pipe 23 of the lower pipe 5 is formed to be large enough to fit the lower pipe connection section 6, but when the lower pipe connection section 6 is inserted, the drainage flow of the lower pipe 5 is reduced. The inner diameter that is effectively utilized for the flow is equivalent to that of the connecting portion 6 for the lower pipe. That is, the lower pipe connecting portion 6 and the lower pipe 5 have the same nominal diameter.

In the pipe body 2 of the drainage piping member 1 according to the present invention, the nominal diameter of the lower pipe connection portion 6 is formed larger than the nominal diameter of the upper pipe connection portion 4. The degree of diameter increase is roughly equivalent to the size of 1 to 2 sizes in the standard as the nominal diameter.
As described above, the nominal diameter of the upper pipe connecting portion 4 and the upper pipe 3 is the same, and the nominal diameter of the lower pipe connecting portion 6 and the lower pipe 5 is the same. It is clear that the nominal diameter of the lower pipe 5 is larger than that. And in this lower pipe 5 (namely, leg bend), the nominal diameter is made constant in the downstream side from it, or it is succeeded to the horizontal main pipe 10 without making it at least small. The horizontal main pipe 10 is also piped so that the nominal diameter is maintained or at least not reduced. Thus, the drain pipe system 25 according to the present invention is configured. That is, the increased nominal diameter is configured not to be reduced in the region extending from the leg vent to the horizontal main pipe and further downstream from the horizontal main pipe to the drainage mass. That is, the nominal diameters of the inlet joint and the outlet joint of the leg vent are the same.

  Due to such a configuration, the flow of the drainage flow flowing down the vertical main pipe (upper pipe 3) and flowing through the leg bend (lower pipe 5) to the horizontal main pipe 10 is smoothed by receiving a larger nominal diameter. Is done. Similarly, the drainage flows that merge from the lateral branch pipe 7 via the branch pipe connecting portion 8 of the drainage piping member 1 are smoothly joined. Further, since the capacity of the pipe is substantially increased in the pipe body 2 of the drainage piping member 1, any of the drainage piping member 1, the leg bend (lower pipe 5), or the horizontal main pipe 10 is excessive. Generation of positive pressure is prevented, and naturally, generation of excessive positive pressure in the standing main pipe (upper pipe 3) is also prevented.

  FIG. 3 shows another aspect regarding the installation status of the drainage piping member 1 of the first embodiment. This installation situation differs from the installation situation shown in FIG. 2 in that the lower pipe connection portion 6 of the drainage piping member 1 is cut from the lower end at an appropriate place to make the short dimension H, and the connection distance to the lower pipe 5 is reduced. It is being shortened. Thereby, the accommodation when the horizontal main pipe 10 is connected and connected to the lower pipe 5 at the lower part of the floor slab 20 is made compact and suitable. Thus, optimal piping construction can be performed for each site by appropriately adjusting the cutting length of the lower pipe connection portion 6 according to the site.

FIG. 4 shows a second embodiment of the drainage piping member 1 according to the present invention. The drainage piping member 1 of the second embodiment is most different from the first embodiment in that the reduced diameter portion 14 is not formed between the water collection chamber 12 and the lower pipe connection portion 6, and the water collection The lower pipe connecting portion 6 is formed while the internal width of the chamber 12 is substantially maintained. That is, the pipe body 2 has a larger nominal diameter between the upper pipe connecting portion 4 and the branch pipe connecting portion 8. Other detailed configurations and operational effects are substantially the same as those in the first embodiment.
FIG. 5 shows a third embodiment of the drainage piping member 1 according to the present invention. In the drainage piping member 1 of the third embodiment, the lower pipe connection portion 6 is formed after the enlarged diameter portion 13 is formed between the water collection chamber 12 and the lower pipe connection portion 6. The internal area remains substantially the same between the upper pipe connecting portion 4. That is, the pipe body 2 has a larger nominal diameter between the branch pipe connection portion 8 and the lower pipe connection portion 6. Other detailed configurations and operational effects are substantially the same as those in the first embodiment.

FIG. 6 shows a fourth embodiment of the drainage piping member 1 according to the present invention. In the pipe member 1 for drainage of the fourth embodiment, the pipe body 2 is provided with a bent pipe part 31 from the water collecting chamber 12 through the hanging pipe part 30, and the lower pipe connecting part 6 is provided at the tip of the bent pipe part 31. Is provided. The bent pipe portion 31 also has a leg bend function.
Therefore, when the drain pipe system 25 according to the present invention is configured using the drain pipe member 1 of the fourth embodiment, the lower pipe 5 connected to the lower pipe connecting portion 6 corresponds to a horizontal main pipe. become.

  As described above, when the bent pipe portion 31 is provided in the lower pipe connecting portion 6 in the pipe main body 2 of the drainage piping member 1, the lower pipe connecting portion 6 comes first from above the installation hole 21 of the floor slab 20. In order to insert the tube main body 2 downward in this way, the protruding portion to the side by the bent tube portion 31 is large. Further, even when the pipe main body 2 is inserted upward from the bottom of the floor slab 20 so that the upper pipe connecting portion 4 comes first, the lateral projection by the branch pipe connecting portion 8 is large. For these reasons, the sleeve diameter (hole diameter) of the installation hole 21 provided in the floor slab 20 must be increased.

Therefore, as shown in FIG. 7 or FIG. 8, the pipe main body 2 of the drainage piping member 1 has a “part 2A including the lower pipe connecting part 6” and a “part 2B not including the lower pipe connecting part 6” as separate members. It is desired to form a joint structure that joins these portions 2A and 2B.
In the drainage piping member 1 shown in FIG. 7, the “part 2A including the lower pipe connecting portion 6” includes the upper pipe connecting portion 4, the water collecting chamber 12, the drooping pipe portion 30, the bent pipe portion 31, and the lower pipe connecting portion 6. The “part 2B not including the lower pipe connecting portion 6” is only the branch pipe connecting portion 8.

  Therefore, the “part 2A including the lower pipe connection portion 6” is inserted into the installation hole 21 of the floor slab 20 from below so that the upper pipe connection portion 4 comes first, and the water collecting chamber 12 is inserted. After being exposed onto the floor slab 20, the branch pipe connection portion 8, which is a “portion 2 </ b> B not including the lower pipe connection portion 6”, is coupled to the water collection chamber 12. As a method for this connection, an appropriate method may be employed as appropriate, such as a screw connection or a flange connection, or a belt-type winding fastener that is tightened into a body winding shape. Accordingly, the installation hole 21 of the floor slab 20 may be formed with a hole diameter that is not too large with the water collection chamber 12 passing as a guide.

In the drainage piping member 1 shown in FIG. 8, “the portion 2 </ b> A including the lower pipe connecting portion 6” has the bent pipe portion 31 and the lower pipe connecting portion 6, and “the lower pipe connecting portion 6 is not included. The portion 2 </ b> B ”includes the upper pipe connection portion 4, the water collecting chamber 12, the branch pipe connection portion 8, and the drooping pipe portion 30.
Therefore, from the upper side of the installation hole 21 of the floor slab 20, the “part 2B not including the lower pipe connection portion 6” is inserted downward with the drooping pipe portion 30 first, The bent pipe portion 31 of the “part 2A including the lower pipe connecting portion 6” is abutted and coupled to the lower end of the hanging pipe portion 30 protruding downward from the hole 21. As a method for this connection, an appropriate method may be employed as appropriate, such as a screw connection or a flange connection, or a belt-type winding fastener that is tightened into a body winding shape. Accordingly, the installation hole 21 of the floor slab 20 may be formed with a hole diameter that is not too large, with reference to the fact that the outer diameter of the drooping pipe portion 30 passes.

By the way, the drainage pipe system 25 according to the present invention can be configured not only when the drainage piping member 1 according to the present invention is used, but also by combining various types of piping members.
The present invention is not limited to the above-described embodiments, and can be appropriately changed according to the embodiments.
For example, in the drainage piping member 1, the upper pipe connecting portion 4, the lower pipe connecting portion 6, and the branch pipe connecting portion 8 of the pipe main body 2 include a receptacle type (including a mechanical type and a one-touch type), an inlet type, a flange The joint type can be changed as appropriate.

The material of the tube body 2 may be metal or resin.
As the drainage piping member 1 used for the portion where the branch pipe connection portion 8 is provided in the drainage pipe system 25 and the lowermost floor, it is preferable not to have a swirl vane, a drift plate, a current plate, or the like. This is to prevent generation of washing foam and excessive positive pressure due to turbulent flow in the drainage flow at the leg bend connected to the downstream side. However, the drainage piping member having swirl vanes and drift plates may be adopted in the upper floor as the standing main pipe.
The drain pipe system 25 is provided with a branch pipe connection portion 8 and a drain pipe member 1 used on the lowermost floor, which is provided with a rectifying plate or the like for preventing the generation of washing foam and enhancing the discharge effect. It is good as it is.

It is the front view which showed 1st Embodiment of the piping member for drainage which concerns on this invention. It is the front view which showed the drain pipe system using the piping member for drainage of 1st Embodiment. It is the front view which showed the construction condition of another aspect with respect to FIG. It is the front view which showed 2nd Embodiment of the piping member for drainage which concerns on this invention. It is the front view which showed 3rd Embodiment of the piping member for drainage which concerns on this invention. It is the front view which showed the drainage pipe system using 4th Embodiment of the piping member for drainage which concerns on this invention. It is the exploded front view explaining the connection structure in the piping member for drainage of a 4th embodiment. FIG. 8 is an exploded front view illustrating a coupling structure different from FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe member for drainage 2 Pipe body 2A Part including lower pipe connection part 2B Part not including lower pipe connection part 4 Upper pipe connection part 6 Lower pipe connection part 8 Branch pipe connection part 13 Widening part 14 Reduced diameter part

Claims (6)

  It has a pipe body (2) provided with an upper pipe connection part (4) and a lower pipe connection part (6) and a branch pipe connection part (8) located between these two connection parts. ) In which the nominal diameter of the lower pipe connection portion (6) is larger than the nominal diameter of the upper pipe connection portion (4).   2. The drainage body according to claim 1, wherein the pipe body (2) has a larger nominal diameter between the upper pipe connection portion (4) and the branch pipe connection portion (8). Piping member.   2. The drainage body according to claim 1, wherein the pipe body (2) has a nominal diameter increased between the branch pipe connection (8) and the lower pipe connection (6). Piping member.   A water collecting chamber (12) is formed in the pipe body (2) so as to correspond to a portion where the branch pipe connecting portion (8) is provided, and the inside of the water collecting chamber (12) is an upper pipe connecting portion. The drain piping member according to claim 1, wherein the drain piping member is formed to have a larger diameter than a nominal diameter of the connecting portion (4) and the lower pipe connecting portion (6).   The pipe body (2) has a joint structure in which a part (2A) including a lower pipe connection part (6) and a part (2B) not including the lower pipe connection part (6) are formed as separate members and then joined together. The drainage piping member according to any one of claims 1 to 4, wherein the drainage piping member is provided.   A vertical main pipe, a leg bend provided at the lower end of the vertical main pipe, a horizontal main pipe provided via the leg bend, and a height position close to the leg bend with respect to the vertical main pipe. In the drainage pipe system having the branch pipe connection portion for the lowest floor, the nominal diameter at the inflow portion to the leg bend is larger than the nominal diameter of the standing main pipe upstream from the branch pipe connection portion. A drainage pipe system characterized in that is formed in a large diameter.

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