JP2006307536A - Underfloor piping structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underfloor piping structure without causing sealing water breaking of a trap of a water facility by negative pressure as far as a fairly large quantity of waste water does not flow in a drain header from the respective water facilities. <P>SOLUTION: This underfloor piping structure is constituted so that the drain header 2 is arranged under the floor; an upstream side drain pipe 3a, a downstream side drain pipe 3b and a drain branch pipe are connected to a connecting port 2a of its upstream side end part, a connecting port 2b of a downstream end part and a connecting port 2c of a side part; an inside upper space of the drain header and an inside upper space of the downstream side drain pipe are communicated by a bypass ventilation pipe 4; a vortex flow generator 6 for generating a vortex flow is arranged inside a foundation 5 of a building; and the downstream side drain pipe 3b and a foundation penetrating drain pipe 3b are connected. The downstream side drain pipe 3b is kept under atmospheric pressure by the vortex flow generator 6, and even if a drain header vicinal part of the downstream side drain pipe 3b is blocked up by the waste water, the drain header 2, the upstream side drain pipe 3a and the drain branch pipe are kept under the same atmospheric pressure as the downstream side drain pipe 3b by the bypass ventilation pipe 4, to prevent the sealing water breaking of the trap of the water facility by the negative pressure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underfloor piping structure that eliminates the generation of negative pressure in the underfloor piping of a centralized collective drainage system that uses a drainage header, and can prevent the sealing failure of a water facility trap due to the negative pressure.

  In the underfloor piping of a centralized collective drainage system using a drainage header, if a large amount of drainage flows from the water facilities such as a wash basin, kitchen, bathroom, toilet, etc., into the drainage header through the upstream drainage pipe or drainage branch pipe, The water level inside the header rises and the drainage header's vicinity of the downstream drainage pipe is blocked by drainage, and negative pressure is generated inside the drainage header, upstream drainage pipe, and drainage branch pipe. There was a problem that the sealing water breakage of the trap was likely to occur. In such underfloor piping, the rising end of the foundation through drainage pipe that penetrates the foundation of the building is often connected to the downstream drainage pipe via the right angle elbow joint. There is also a problem in that the bent portion of the inside and the foundation through drain pipe is blocked by the drainage, and the sealing failure due to the negative pressure occurs as described above.

  In order to deal with the above problems, a collective (drainage header) was installed under the floor, and the downstream drainage pipe connected to the collective mass was connected to an outdoor drainage pipe via a step junction pipe with a bypass pipe. An underfloor piping structure has been proposed (Patent Document 1).

In such an underfloor piping structure, even if the bent portion of the step joint pipe is blocked by drainage, the ventilation in the pipe is maintained through the bypass pipe, so that the generation of negative pressure in the downstream drain pipe is temporarily prevented. The However, when the water level inside the mass gathered due to a large amount of drainage becomes higher than the connection port of the downstream drainage pipe, the portion near the gathering of the downstream drainage pipe is blocked by the drainage, and the inside of the mass and the upstream drainage pipe Since negative pressure was generated inside, there still remained a problem that it was not possible to satisfactorily prevent the sealing failure of the trap of the water facility. In addition, as in this underfloor piping structure, when a downstream drain pipe is connected to an outdoor drainage pipe via a step joint pipe with a bypass pipe, the step joint pipe with a bypass pipe is bulky and the pipe Since the assembly of the road is troublesome and requires a large buried space, there is also a problem that the construction is not easy.
JP 2003-147826 A

  The present invention has been made to solve the above-mentioned problem. Unless a large amount of drainage flows from each water facility into the drainage header, there is no risk of the drainage pipe closing and generating negative pressure. It is an object of the present invention to provide an underfloor piping structure that is less likely to cause a sealing failure of a water facility trap and is easy to construct.

  In order to solve the above-mentioned problem, a first underfloor piping structure according to the present invention is provided with a drainage header under the floor, a connection port at an upstream end, a connection port at a downstream end, and a connection port at a side. In addition, the upstream drain pipe, downstream drain pipe and drain branch pipe are connected to each other, and the internal space above the drain header and the internal space above the downstream drain pipe are connected by a bypass vent pipe to generate eddy currents. The vessel is installed inside the foundation of the building, and the downstream drainage pipe and the foundation through drainage pipe are respectively connected to the side connection port and the bottom connection port.

  And the 2nd underfloor piping structure which concerns on this invention installs a drainage header under the floor, and connects the upstream drainage to the connection port of the upstream end, the connection port of the downstream end, and the connection port of the side. Connect the pipe, downstream drainage pipe and drainage branch pipe to each other, and connect the upper space inside the drainage header and the upper space inside the downstream drainage pipe with a bypass ventilation pipe to create a vortex generator that generates vortex. The second drainage header connected to the section is installed inside the foundation of the building, and the downstream drainage pipe and the other drainage are connected to the upstream end connection port and the side connection port of the second drainage header. Each of the branch pipes is connected, and a basic through drainage pipe is connected to the connection port at the bottom of the vortex generator.

  In the first and second underfloor piping structures according to the present invention, it is preferable to connect the downstream end of the foundation through drainage pipe to a drainage basin that generates a vortex embedded in the start end or in the middle of an outdoor drainage pipe. .

  In the first underfloor piping structure, drainage from water facilities such as washstands, kitchens, bathrooms, toilets, etc. flows into the drainage header through the upstream drainage pipe and drainage branch pipe, and the water level inside the drainage header is downstream. When it becomes higher than the connection port at the side end, the drainage header vicinity part of the downstream drainage pipe is blocked by drainage, but even if blocked in this way, the internal upper space on the downstream side from the blocking part of the downstream drainage pipe Since the upper space inside the drainage header is connected by the bypass ventilation pipe, the drainage header, upstream drainage pipe, and drainage branch pipe are kept at the same pressure as the downstream drainage pipe unless the amount of drainage is very large. It does not occur. The wastewater that flows into the vortex generator from the downstream drainage pipe becomes a vortex, and an air core is formed at the center of the drainage and flows down from the connection port at the bottom of the vortex generator to the foundation penetration drainage pipe. The basic through drainage pipe and the downstream drainage pipe are always kept at atmospheric pressure with no air clogging. Therefore, the drainage header communicating with the downstream drainage pipe and the bypass vent pipe, the upstream drainage pipe connected to the drainage header, and the drainage branch pipe are also maintained at atmospheric pressure, and the downstream drainage pipe as described above. Even if the drain header header is blocked by drainage, negative pressure will not be generated in the upstream drainage pipe or drainage branch pipe unless a large quantity of drainage flows that impairs the ventilation function of the bypass ventilation pipe. It is possible to prevent the water facility trap from being damaged by negative pressure.

  The second underfloor piping structure also connects the internal upper space of the drainage header and the internal upper space of the downstream drainage pipe by the bypass vent pipe, and passes through the second drainage header from the downstream drainage pipe to the downstream side. The drainage that has flowed into the vortex generator at the side end becomes a vortex and flows down while forming an air core, so that the foundation through drainage pipe is not blocked. Therefore, even if the drainage header vicinity part of the downstream drainage pipe is blocked by drainage, all ventilation of the upstream drainage pipe, drainage branch pipe, drainage header, downstream drainage pipe, second drainage header, and foundation through drainage pipe Is maintained at almost atmospheric pressure, so that a large amount of drainage does not flow so as to impair the ventilation function of the bypass ventilation pipe, so that the sealing failure of the trap of the water facility due to negative pressure does not occur. In addition, since this underfloor piping structure has an additional second drainage header, it is possible to increase the efficiency of collective drainage by connecting more drainage branch pipes.

  In addition, the underfloor piping structure in which the downstream end of the foundation through drain pipe is connected to a drainage basin that generates a vortex that is embedded at the beginning or in the middle of an outdoor drainage pipe, Since the air flows into the outdoor drainage pipe while forming an air core as a vortex, the outdoor drainage pipe is not blocked by the drainage, and the sealing damage can be more reliably prevented.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 is an overall view showing an embodiment of a first underfloor piping structure according to the present invention, FIG. 2 is a perspective view of a drainage header used in the underfloor piping structure, FIG. 3 is a sectional view of the drainage header, and FIG. FIG. 5 is a side view of a bypass ventilation pipe used for the underfloor piping structure, FIG. 6 is a sectional view of a vortex generator used for the underfloor piping structure, and FIG. FIG. 8 is an enlarged partial sectional view of the underfloor piping structure.

  In the underfloor piping structure shown in FIG. 1, a drainage header 2 made of synthetic resin is installed on the soil concrete 1 under the floor, and the connection port 2 a at the upstream end of the drainage header 2 and the downstream end of the drainage header 2 are provided. An upstream drain pipe 3a, a downstream drain pipe 3b, and a drain branch pipe (not shown) from the water facility are connected to the connection port 2b and the side connection port 2c, respectively. Then, both ends of the bypass vent pipe 4 are connected to the upper opening 2d of the drain header 2 and the cheese joint 3c in the middle of the downstream drain pipe 3b through the right angle elbow joints 4a and 4a, as shown in FIG. The bypass vent pipe 4 communicates the interior upper space V1 of the drainage header 2 and the interior upper space V2 of the downstream drainage pipe 3b.

  Further, a vortex generator 6 made of a synthetic resin is installed in the boxed portion 1a of the soil concrete 1 inside the fabric foundation 5, and the downstream drainage pipe 3b is connected to the side connection port 6a. ing. And the upstream end of the foundation penetration drain pipe 3d which penetrates the cloth foundation 5 is connected to the connecting port 6b at the bottom of the vortex generator 6 from below via the large bend joint 3e and the vertical pipe 3f for depth adjustment. The downstream end of the foundation through drain pipe 3d is connected to the connection port 7a on the side of the drainage basin 7 that generates a vortex embedded in the beginning or midway of an outdoor drain pipe (not shown). Has been.

  As shown in FIG. 2, the drainage header 2 is a horizontal cylindrical body having an oval cross-sectional shape with good drainage flow, and is connected to an upstream drainage pipe 3a at an upstream end thereof. A port 2a is provided, a connection port 2b for connecting the downstream drainage pipe 3b is provided at the downstream end, and a plurality of connection ports 2c and 2c for connecting a drainage branch pipe (not shown) are provided on both sides. It has been.

  Both the upstream end connection port 2a and the both side connection ports 2c are provided so as to be offset upward so that the upper ends thereof are substantially the same height as the upper end of the drainage header 2. Even if the internal water level rises, the upstream drainage pipe 3a and the drainage branch pipe connected to these connection ports 2a and 2c are not blocked. On the other hand, the connection port 2b at the downstream end is biased downward so that the lowermost portion of the inner bottom surface of the downstream drainage pipe 3b connected thereto and the lowermost portion of the inner bottom surface of the drainage header 2 have the same height. All the drainage flows out to the downstream drainage pipe 3b without stagnation at the bottom of the drainage header 2.

  In addition, a plurality of openings 2 d are provided in the upper portion of the drainage header 2, and the upper opening 2 d located on the most downstream side is used as a connection port of the bypass vent pipe 4. The other upper opening 2d is used as an inspection port, and a cap 2e is detachably attached thereto.

  This drainage header 2 is not integrally molded with synthetic resin. As shown in FIGS. 3 and 4, a plurality of header joints 2f, 2f molded with synthetic resin, upstream end closing member 2g, and downstream The side end closing member 2h is joined and integrated.

  The header joint 2f is formed with a receiving port 2i on one end side (upstream end side) of a short cylindrical body having an oval cross-sectional shape, and a drainage branch pipe connecting port 2c on one side of the short cylindrical body. And an opening 2d is formed on the upper surface of the short cylindrical body, and a cap 2e is detachably screwed into the upper opening 2d used as an inspection port.

  Further, the upstream end closing member 2g forms an insertion tube portion 2j to be inserted into the receiving port 2i of the header joint 2f on one side of the closing plate having an oval shape, and the upstream side drain pipe 3a. The connection port 2a is formed by deviating above the closing plate, and the downstream end closing member 2h is upstream of the tapered funnel-shaped cylinder whose downstream opening end is eccentric downward. A receiving port 2k into which the header joint 2f is inserted is formed at the opening end of the, and a connecting port 2b of the downstream drainage pipe 3b is formed at the downstream opening end that is eccentric downward.

  The drainage header 2 is connected to the receiving port 2i of the header joint 2f by inserting the other end (downstream side) end of the adjacent upstream header joint 2f into a watertight connection with an adhesive, The insertion tube portion 2j of the upstream end closing member 2g is inserted into the receiving port 2i of the upstream header joint 2f and is watertightly connected with an adhesive, and the end portion of the downstream header joint 2f is connected. Is inserted into the receiving port 2k of the downstream end closing member 2h and is assembled in a watertight manner with an adhesive. Accordingly, by increasing / decreasing the number of connections of the header joint 2f, the drainage header 2 having the desired number of drainage branch connection ports 2c can be assembled, and for the header having the connection port 2c formed on one side surface. Depending on the combination of the joint 2f and the header joint 2f having the connection port 2c formed on the opposite side surface, the drainage header 2 having the connection port 2c only on one side surface or the desired number of connection ports 2c on both side surfaces. The drainage header 2 can be assembled.

  As shown in FIGS. 1 and 8, the drainage header 2 is installed on the soil concrete 1 with a predetermined flow gradient by supporting both end portions thereof with header supports 8 and 8. .

  As shown in FIG. 5, the bypass vent pipe 4 is made of a synthetic resin pipe having flexibility such as a corrugated pipe, and right-angle elbow joints 4a and 4a are attached to both ends thereof, and the bypass vent pipe 4 is pulled out. Both ends of the vent pipe 4 are locked by the retaining rings 4b and 4b so as not to come out of the right angle elbow joints 4a and 4a. A plurality of packing fitting grooves 4d for fitting a ring-shaped waterproof packing are formed on the outer peripheral surface of the insertion port 4c of the right angle elbow joint 4a.

  The bypass vent pipe 4 has a waterproof packing fitted in the packing fitting grooves 4d and 4d of the right angle elbow joints 4a and 4a at both ends, and as shown in FIG. 8, the insertion port of the right angle elbow joint 4a at the upstream end. 4c is connected in a watertight manner to the upper opening 2d of the drainage header 2 (the upper opening 2d located on the downstream side), and the insertion port 4c of the right angle elbow joint 4a at the downstream end is provided in the middle of the downstream drainage pipe 3b. By connecting the upper joint port 3g of the cheese joint 3c in a watertight manner, the interior upper space V1 of the drainage header 2 and the interior upper space V2 of the downstream drainage pipe 3b are communicated, and the drainage header of the downstream drainage pipe 3b is connected. Even if the vicinity is blocked by the drainage W, negative pressure is prevented from being generated inside the drainage header 2. Accordingly, the cheese joint 3c is attached to a location where the internal upper space V2 on the downstream side of the downstream drain pipe 3b blocked by the drainage W can be secured, and the bypass connection is made to the upper connection port 3g of the cheese joint 3c. It is important to insert and connect the insertion port 4c of the right angle elbow joint 4a at the downstream end of the trachea 4. As a result of repeating the experiment, if the downstream drainage pipe 3b is a drainage pipe having a nominal diameter of 75 mm (hereinafter referred to as VU75), for example, the portion from the upstream end of the downstream drainage pipe 3b to approximately 50 cm The space V2 is difficult to be secured, and it has been found that the internal upper space V2 is secured at a portion separated by approximately 70 cm or more from the upstream end. Therefore, when the downstream drain pipe 3b of the VU 75 is specifically used, the downstream drain It is preferable to attach the cheese joint 3c to a portion at least approximately 70 cm away from the upstream end of the pipe 3b and connect the right angle elbow joint 4a at the downstream end of the bypass vent pipe 4.

  As shown in FIGS. 6 and 7, the eddy current generator 6 installed in the vicinity of the inside of the fabric base 5 has an upper opening 6c formed in an annular shape, and a handle is attached to the annular upper opening 6c. A circular lid 6d is detachably fitted. As shown in FIG. 7, the lower side wall 6e of the annular opening upper portion 6c is formed in a spiral shape in which the radius of curvature gradually decreases from the middle and reaches the connection port 6b of the bottom wall 6f. The start end and the end of the spiral side wall 6e are connected by a flat vertical wall 6g. The connection port 6a for connecting the downstream drainage pipe 3b is displaced to one side of the vortex generator 6 and protrudes in parallel with the vertical wall 6g from the lower part on the start end side of the side wall 6e. The connection port 6b of 6f is formed at a position inscribed in the terminal portion of the spiral side wall 6e when viewed in plan. Accordingly, the wastewater that flows into the vortex generator 6 from the downstream drainage pipe 3b connected to the connection port 6a generates a vortex along the spiral side wall 6e, and causes a large turbulence in the vortex while forming an air core. The vertical flow 3f for depth adjustment and the large bend joint 3e flow down from the connection port 6b of the bottom wall 6f and flow to the basic through drainage pipe 3d while maintaining the momentum of the vortex. Further, when the connection port 6a for connecting the downstream drainage pipe 3b is projected from the lower part on the start end side of the side wall 6e like the vortex generator 6, the outflow of the connection port 6a on the inflow side and the bottom wall 6f Since the height difference with the side connection port 3b is slight, the extension distance of the underfloor piping can be extended by reducing the height of the downstream drainage pipe 3b.

  Further, as described above, if the basic through drainage pipe 3d is connected to the connection port 6b on the bottom wall of the eddy current generator 6 through the large bend joint 3e and the depth adjusting vertical pipe 3f, the depth is increased by cutting. The depth position of the basic through drainage pipe 3d can be adjusted simply by changing the length of the vertical pipe 3f for adjusting the height, and the vortex generator 6 is rotated around the vertical pipe 3f and the connection port 6b. Since the downstream drainage pipe 3b can be piped at a desired angle with respect to the cloth foundation 5, the workability and the degree of freedom of pipework are improved.

  A drainage basin 7 connecting the downstream end of the foundation through drainage pipe 3d is buried at the beginning or midway of an outdoor drainage pipe (not shown), and is a drainage basin that generates a vortex. That is, the drainage basin 7 is formed such that the connection port 7a at the upper part of the side wall connecting the foundation through drainage pipe 3d is displaced to one side from the center of the basin, and the drainage flowing from the foundation penetration drainage pipe 3d 7 flows along the inner surface of the side wall to form a vortex, and is drained from the lower connection port 7b to an outdoor drain pipe (not shown).

  In the underfloor piping structure as described above, a large amount of drainage from each water facility such as a wash basin, kitchen, bathroom, and toilet flows into the drain header 2 through the upstream drain pipe 3a and drain branch pipe (not shown). As shown in FIG. 8, when the water level of the drainage W inside the drainage header 2 becomes higher than the connection port 2b at the downstream end, the drainage header vicinity portion of the downstream drainage pipe 3b is blocked by the drainage W. Even if it is blocked in this way, the internal upper space V2 on the downstream side of the closed portion of the downstream drainage pipe 3b and the internal upper space V1 of the drainage header 2 communicate with each other by the bypass vent pipe 4, so As long as the ventilation function of the trachea 4 is not impaired, the drainage header 2, the upstream drainage pipe 3a, and the drainage branch pipe are maintained at the same atmospheric pressure as the downstream drainage pipe 3b, and no negative pressure is generated. Then, the waste water flowing into the vortex generator 6 from the downstream drain pipe 3b becomes a vortex, an air core is formed at the center thereof, and the height adjusting vertical pipe 3f from the connection port 6b at the bottom of the vortex generator 6 is large. The vertical pipe 3f, the large bend joint 3e, and the basic through drainage pipe 3d are not blocked by the drainage W because they flow down to the basic through drainage pipe 3d through the bent joint 3e, and further from the basic through drainage pipe 3d. Since the wastewater flowing into the outdoor drainage basin 7 is also swirled and drained to the outdoor drainage pipe, the outdoor drainage pipe is not blocked by the drainage. Accordingly, since the downstream drainage pipe 3b is always kept at the atmospheric pressure with the ventilation, it is connected to the drainage header 2 communicating with the downstream drainage pipe 3b and the bypass ventilation pipe 4 or the drainage header 2. Even if the upstream drain pipe 3a, the drain branch pipe, etc. are maintained at atmospheric pressure, and the portion near the drain header of the downstream drain pipe 3b is blocked by the drain W as described above, the ventilation function of the bypass vent pipe 4 is impaired. Unless a large amount of drainage flows as much as possible, negative pressure is generated in the upstream drain pipe 3a and the drain branch pipe, and there is no fear of causing the sealing failure of the trap of the water facility.

  FIG. 9 is an overall view showing an embodiment of a second underfloor piping structure according to the present invention, and FIG. 10 is a perspective view showing a second drainage header in which eddy current generators used in the underfloor piping structure are connected.

  In this underfloor piping structure, instead of the vortex generator 6 described above, a second drainage header 20 connected to the vortex generator is installed inside the fabric foundation 5 of the house. It differs from the above-mentioned underfloor piping structure by the point which has connected the downstream drainage pipe 3b to the connection port 2a of a part.

  As shown in FIG. 10, the second drainage header 20 has a vortex generator 60 connected to its downstream end, and the drainage header 20 itself is the downstream end closing member 2h. 9 and FIG. 10, the same members are denoted by the same reference numerals, the description of the drain header 20 itself is omitted, and only the vortex generator 60 is described. To do.

  As shown in FIG. 10, the vortex generator 60 is provided with a receiving port 60b at the end of the drainage introduction passage 60a, and the downstream end of the drainage header 20 is fitted into the receiving port 60b. Thus, the downstream end of the drainage header 20 is connected without water leakage. And the waste_water | drain introduction channel | path part 60a is formed in the channel | path part of the shape narrowed down toward the front from the receiving port 60b.

  In the vortex generator 60, one side wall extending from the drainage introduction passage 60a is formed as a spiral curved side wall 60c with a gradually decreasing radius of curvature, and the curved side wall 60c is formed on one side of the drainage header 20. The end portion 60d (terminal portion) having a smaller radius of curvature bulges and continues to the other side wall of the drainage introduction passage portion 60a. A basic through drainage pipe 3d is connected to the connection port 60e formed in the bottom wall of the vortex generator 60 via a large bend joint 3e and a depth adjusting vertical pipe 3f. When the eddy current generator 60 is viewed in plan, the connection port 60e is in a positional relationship inscribed in the end portion 2d having a smaller radius of curvature of the curved side wall portion 60c. A lid 60g is detachably attached to the upper end opening 60f of the vortex generator 60 excluding the drainage introduction passage 60a.

  When such a vortex generator 60 is connected to the downstream end of the drainage header 20, the drainage flowing from the drainage header 20 through the drainage introduction passage portion 60a into the vortex generator 60 is curved side wall portion 60c. A vortex flows while flowing along the inner surface of the curved wall portion 60c, and flows into the bottom wall connection port 60e from the end 2d having the smaller radius of curvature of the curved side wall portion 60c while maintaining the vortex flow without causing large turbulence. Therefore, the air core is surely formed at the center of the vortex and the foundation through drainage pipe 3d is prevented from being blocked. In particular, when the spiral curved side wall portion 60c bulges to one side of the drainage header 20 as in this embodiment, the creeping distance of the curved side wall portion 60c that generates the vortex flow becomes long, and there is a momentum with less turbulence. There is an advantage of generating a vortex.

  Since the other configuration of the underfloor piping structure shown in FIG. 9 is the same as that of the underfloor piping structure of FIG. 1 described above, the same members in FIG.

  In such an underfloor piping structure, the internal space above the drainage header 2 communicates with the internal space above the downstream drainage pipe 3b by the bypass vent pipe 4, and also passes through the second drainage header 20 from the downstream drainage pipe 3b. The drainage that flows into the vortex generator 60 at the downstream end of the lever becomes a vortex, which does not flow down while forming an air core and closes the foundation penetrating drainage pipe 3d. It does not occur and does not block the outdoor drain line. Therefore, even if the portion near the drainage header 2 of the downstream drainage pipe 3b is blocked by drainage, the drainage header 2, the upstream drainage pipe 3a and the drainage branch pipe connected to the header, the downstream drainage pipe 3b, the second All the ventilation of the drainage header 20, the drainage branch pipe connected to the header, the depth adjusting vertical pipe 3f, the large bend joint 3e, the basic through drainage pipe 3d, etc. is secured and maintained at atmospheric pressure. Therefore, unless a large amount of drainage that impairs the ventilation function of the bypass ventilation pipe 4 flows, the sealing failure of the trap of the water facility due to negative pressure does not occur. In addition, since the underfloor piping structure has the second drainage header 20 added, more drainage branch pipes can be connected to increase the efficiency of collective drainage.

1 is an overall view showing an embodiment of a first underfloor piping structure according to the present invention. It is a perspective view of the drainage header used for the piping structure under the floor. It is sectional drawing of the drainage header. It is an exploded sectional view of the drainage header. It is a side view of the bypass ventilation pipe used for the same underfloor piping structure. It is sectional drawing of the eddy current generator used for the piping structure under the floor. It is the top view which removed the lid | cover of the same eddy current generator. It is an expanded partial sectional view of the piping structure under the floor. It is a general view which shows embodiment of the 2nd underfloor piping structure which concerns on this invention. It is a perspective view which shows the 2nd drainage header which connected the eddy current generator used for the piping structure under the floor continuously.

Explanation of symbols

2 drainage header 2a upstream end connection port 2b downstream end connection port 2c side connection port 2d upper opening 3a upstream drainage pipe 3b downstream drainage pipe 3c cheese joint 3d foundation through drainage pipe 4 bypass vent pipe 4a Right angle elbow joint 5 Building foundation (cloth foundation)
6 Eddy current generator 6a Side connection port 6b Bottom connection port 7 Drainage basin for generating eddy current 20 Second drainage header 60 Eddy current generator V1 Internal space above drainage header V2 Internal space above downstream drainage pipe

Claims (3)

  Install the drainage header under the floor and connect the upstream drainage pipe, the downstream drainage pipe, and the drainage branch pipe to the connection port at the upstream end, the connection port at the downstream end, and the connection port at the side, respectively. In addition, a vortex generator for generating a vortex flow is installed inside the foundation of the building by connecting the interior upper space of the drainage header and the interior upper space of the downstream drainage pipe with a bypass ventilation pipe. An underfloor piping structure characterized in that the downstream drainage pipe and the foundation through drainage pipe are respectively connected to the bottom connection port.   Install the drainage header under the floor and connect the upstream drainage pipe, the downstream drainage pipe, and the drainage branch pipe to the connection port at the upstream end, the connection port at the downstream end, and the connection port at the side, respectively. In addition, a second drainage header that connects the upper space inside the drainage header and the upper space inside the downstream drainage pipe with a bypass vent pipe and a vortex generator that generates eddy currents at the downstream end is the foundation of the building. The downstream drainage pipe and other drainage branch pipes are connected to the upstream end connection port and the side connection port of the second drainage header, respectively, and at the bottom of the vortex generator Underfloor piping structure characterized by connecting foundation through drainage pipe to connection port.   The underfloor piping structure according to claim 1 or 2, wherein a downstream end of the foundation through drainage pipe is connected to a drainage basin for generating a vortex embedded in the start end or in the middle of an outdoor drainage pipeway.

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