Drainage manifolds, drainage systems, and buildings

Abstract

This invention provides a solution for improving the drainage performance of resin-made drainage manifolds without changing the molds or other components used for manufacturing. [Solution] The drainage manifold 1 has a pipe body 10 and at least one branch pipe connection part 40 that connects a branch pipe 3 to the pipe body 10, and is a resin pipe that is installed so that the pipe body 10 penetrates the floor slab of the building. The drainage manifold 1 has a drainage straightening part 50 provided on the inner circumferential surface of the pipe body 10 that straightens the flow of drainage in the pipe body 10. The drainage straightening part 50 is located at a predetermined position relative to the extension of the axis P2 of the drainage riser 2, in a state where the drainage riser 2 that carries drainage from the upper floor is connected to the upper part of the pipe body 10 so that it is inclined with respect to the axis of the pipe body 10, in order to improve the drainage performance of the drainage manifold 1.

Description

Technical Field

[0004]

[0001] The present invention relates to a resin drainage manifold, a drainage system, and a building, which has a pipe body and at least one lateral branch pipe connection portion for connecting a lateral branch pipe to the pipe body, and the pipe body is arranged to penetrate a floor slab of a building.

Background Art

[0002] A resin drainage manifold having a pipe body and at least one lateral branch pipe connection portion for connecting a lateral branch pipe to the pipe body, and the pipe body is arranged to penetrate a floor slab of a building is known. As such a drainage manifold, for example, Patent Document 1 discloses a resin joint configured to be inserted into a floor slab.

[0003] The joint of Patent Document 1 includes a plurality of branch pipes, a resin upper member that protrudes above the floor slab when the joint is inserted into the floor slab, and a resin lower member that is externally fitted and connected to the lower end of the upper member, and when the joint is inserted into the floor slab, the upper part is embedded inside the floor slab and the lower part protrudes below the floor slab, and a blade member located inside the upper part of the lower member and inclined with respect to the axial center of the lower member, and a thermal expansion material provided on the peripheral wall of the lower member.

[0004] For example, as disclosed in FIG. 1 of Patent Document 1, the lower part of a riser pipe that constitutes a drainage riser pipe in a pipe shaft of a building and allows drainage flowing in from a lateral branch pipe to flow down is fitted to the upper part of the upper member.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, drainage systems including drainage manifolds such as the joint disclosed in Patent Document 1 generally require various drainage performance characteristics. These drainage performance characteristics include, for example, drainage capacity, noise resistance, vibration resistance, and fire resistance. The drainage capacity is determined by SHASE-S218, "Test Method for Drainage Capacity of Drainage Rack Pipe Systems in Apartment Buildings," a standard of the Japan Society of Heating, Air-Conditioning and Sanitary Engineers. The drainage capacity is the maximum flow rate of constant-flow drainage that can be carried out while satisfying predetermined judgment conditions (internal pipe pressure ±400 Pa or less, seal loss 25 mm or less).

[0007] Methods to increase the drainage capacity include, for example, increasing the size of the swirl vanes of the drainage manifold, increasing the number of swirl vanes to increase the amount of drainage that hits the swirl vanes, providing a flow deflection plate upstream of the swirl vanes to increase the amount of drainage guided to the swirl vanes, or making the swirl vanes curved to efficiently swirl the drainage.

[0008] Furthermore, in order to reduce noise and vibration, possible methods include increasing the thickness of the pipe body and swivel vanes of the drainage manifold to suppress vibration, or making the swivel vanes curved and reducing their size to decrease the amount of drainage hitting them.

[0009] In order to achieve the improved drainage performance described above, it is necessary to change the structure of the drainage manifold. To do this, it is necessary to change the molds used to mold the resin components that make up the resin drainage manifold.

[0010] In response to this, there is a need for a configuration that can improve the drainage performance of a drainage manifold without changing the molds or other equipment used to mold the resin components that make up the resin drainage manifold.

[0011] The objective of the present invention is to realize a configuration for a resin-made drainage manifold that can improve drainage performance without changing the molds or other equipment used to mold the resin components that constitute the drainage manifold. [Means for solving the problem]

[0012] A drainage manifold according to one embodiment of the present invention is a resin drainage manifold having a pipe body and at least one lateral branch pipe connection portion for connecting a lateral branch pipe to the pipe body, wherein the pipe body is installed so as to penetrate the floor slab of a building. This drainage manifold has a drainage straightening portion provided on the inner circumferential surface of the pipe body for straightening the flow of drainage in the pipe body. The drainage straightening portion is located on the inner circumferential surface of the pipe body at a predetermined position relative to the extension of the axis of the drainage riser, with respect to the extension of the axis of the drainage riser, in a state where a drainage riser for carrying drainage from an upper floor is connected to the upper part of the pipe body so as to be inclined with respect to the axis of the pipe body (first configuration).

[0013] In the above configuration, the drain riser is connected to the upper part of the main body of the drain manifold so as to be inclined with respect to the axis of the main body of the drain manifold, and the drain flow straightening section provided on the inner circumferential surface of the main body is positioned at a predetermined location relative to the extension of the axis of the drain riser when the drain manifold is viewed in the axial direction, in order to improve the drainage performance of the drain manifold. As a result, the wastewater flowing from the drain riser into the drain manifold can be allowed to flow smoothly, improving the drainage performance of the drainage system including the drain manifold. Therefore, a drain manifold capable of improving drainage performance can be obtained without changing the mold for molding the resin components that constitute the drain manifold.

[0014] In the first configuration described above, the drainage straightening section is positioned on the inner circumferential surface of the pipe body, when viewed axially through the drainage manifold, at a location where the extension of the axis of the drainage riser coincides (second configuration). This increases the amount of drainage guided from the drainage riser to the drainage straightening section. Thus, a configuration that improves the drainage performance of the drainage system can be realized.

[0015] In the second configuration described above, the drainage straightening section is located on the inner circumferential surface of the pipe body at a position where the extension of the axis of the drainage riser intersects it (third configuration). This increases the amount of drainage guided from the drainage riser to the drainage straightening section. Thus, a configuration that further improves the drainage performance of the drainage system can be realized.

[0016] In the first configuration described above, the drainage straightening section is positioned on the inner circumferential surface of the pipe body, when viewed axially from the drainage manifold, at a position that does not coincide with the extension of the axis of the drainage riser (fourth configuration). As a result, the amount of drainage flowing from the drainage riser toward the drainage straightening section is reduced, thereby reducing the noise generated by the drainage straightening section.

[0017] In the first configuration described above, the drainage flow straightening section is provided on the inner circumferential surface of the pipe body and includes a swirling vane that causes the drainage flowing inside the pipe body to have a swirling flow direction centered on the axis of the pipe body (fifth configuration).

[0018] This makes it possible to obtain the effects and advantages of each of the above claims when the drainage rectifier is a swirling vane.

[0019] In the fifth configuration described above, the drainage straightening section is located upstream of the swirling vane on the inner circumferential surface of the pipe body and further includes a flow deflection plate that changes the direction of drainage flow (sixth configuration).

[0020] This makes it possible to obtain the effects and advantages of each of the above claims when the drainage flow straightening section is a flow deflection plate.

[0021] In the first configuration described above, the upper part of the pipe body is configured such that, when viewed in the axial direction of the drain riser, the maximum deviation of the axis of the drain riser with respect to the extension of the axis of the drain manifold is less than or equal to half the inner diameter of the drain riser (seventh configuration).

[0022] This enables the creation of a venting space for the wastewater flowing from the wastewater riser pipe to the wastewater collecting pipe. Therefore, the generation of negative pressure inside the wastewater collecting pipe can be suppressed. Consequently, a configuration that improves the drainage performance of the drainage system can be realized.

[0023] A drainage system according to an embodiment of the present invention includes a wastewater collecting pipe having any one of the first to seventh configurations, a lateral branch pipe connected to the lateral branch pipe connection portion of the wastewater collecting pipe through which wastewater from each floor flows, and a wastewater riser pipe connected to the pipe body of the wastewater collecting pipe through which wastewater from the upper floors flows (eighth configuration).

[0024] This makes it possible to realize a drainage system that improves drainage performance without changing the mold for manufacturing the wastewater collecting pipe.

[0025] A building according to an embodiment of the present invention includes the drainage system (ninth configuration). This results in a building having a drainage system that can improve drainage performance without changing the mold for manufacturing the wastewater collecting pipe.

Advantages of the Invention

[0026] A wastewater collecting pipe according to an embodiment of the present invention is provided on the inner peripheral surface of the pipe body and has a drainage rectifying portion that rectifies the flow of wastewater in the pipe body. The drainage rectifying portion is located at a predetermined position that improves the drainage performance of the wastewater collecting pipe with respect to the extension line of the axis of the wastewater riser pipe in a state where the wastewater riser pipe through which wastewater from the upper floors flows is connected to the upper part of the pipe body so as to incline with respect to the axis of the pipe body. [[ID=2l]]

[0027] A drainage system according to an embodiment of the present invention includes the wastewater collecting pipe, a lateral branch pipe connected to the lateral branch pipe connection portion of the wastewater collecting pipe through which wastewater from each floor flows, and a wastewater riser pipe connected to the pipe body of the wastewater collecting pipe through which wastewater from the upper floors flows.

[0028] A building according to an embodiment of the present invention includes the drainage system.

[0029] This allows wastewater flowing from the drain riser into the drain manifold to flow smoothly, improving drainage performance. Therefore, it is possible to realize a drain manifold that can improve drainage performance without changing the mold, and a drainage system equipped with it. [Brief explanation of the drawing]

[0030] [Figure 1] This figure shows an example of a drainage system using a drainage manifold according to Embodiment 1 of the present invention. [Figure 2] This is a perspective view showing the general configuration of a drainage manifold. [Figure 3] This is a top view showing the schematic configuration of a drainage manifold. [Figure 4] Figure 3 is a cross-sectional view showing the cross-section of the drainage manifold cut along the line IV-IV. [Figure 5] This is a cross-sectional view of a drainage manifold and drainage riser pipe when cut along a plane containing the axis. [Figure 6] Figure 5 shows a cross-section of the drain riser and drain manifold as cut along the line VI-VI. [Figure 7] This is a cross-sectional view of the drainage manifold and drainage riser according to Embodiment 2, when cut along a plane including the axis. [Figure 8] This figure shows the cross-section of the drain riser and the drain manifold as cut along the line VIII-VIII in Figure 7. [Figure 9] This is a cross-sectional view of the drainage manifold and drainage riser according to Embodiment 3, when cut along a plane including the axis. [Figure 10] This figure shows a cross-section of the drain riser and drain manifold as cut along line XX in Figure 9. [Modes for carrying out the invention]

[0031] The following describes each embodiment with reference to the drawings. In each drawing, the same parts are denoted by the same reference numerals, and the description of those parts will not be repeated. Note that the dimensions of the components in each drawing do not faithfully represent the dimensions of the actual components or the dimensional ratios of each component.

[0032] In the following explanation, the axial direction of the pipe body 10 of the drainage manifold 1 is referred to as the "axial direction." The radial direction of the pipe body 10 is referred to as the "radial direction." The circumferential direction of the pipe body 10 is referred to as the "circumferential direction."

[0033] Furthermore, in the following explanation, the expressions "fix," "connect," and "attach" (hereinafter referred to as "fixing, etc.") include not only cases where components are directly fixed to each other, but also cases where they are fixed to each other via other components. In other words, in the following explanation, the expressions "fixing, etc." include both direct and indirect fixing of components to each other.

[0034] [Embodiment 1] (Drainage system) Figure 1 shows an example of a drainage system S1 using a drainage manifold 1 according to Embodiment 1 of the present invention. The drainage manifold 1 is a manifold joint installed at the junction of a drainage riser 2 and a horizontal branch pipe 3 in a multi-story building T such as an apartment building or commercial building. The drainage system S1 is a drainage system installed in a multi-story building T using the drainage manifold 1, drainage riser 2 and horizontal branch pipe 3, etc. In other words, the building T has the drainage system S1.

[0035] The drainage system S1 comprises a drainage manifold 1, a drainage riser 2, and a horizontal branch pipe 3. The drainage manifold 1 is installed in a through-hole X1 that penetrates vertically through the floor slab X of the building T. The drainage riser 2 is located above or below the floor slab X and extends vertically, with its end connected to the drainage manifold 1. The horizontal branch pipe 3 extends along its upper surface on the floor slab X, with its end connected to the drainage manifold 1.

[0036] The detailed configuration of the drainage manifold 1 will be described later, but as shown in Figure 2, the drainage manifold 1 has a pipe body 10, an upper riser connection 20, a lower riser connection 30, and a horizontal branch pipe connection 40. The upper riser connection 20 is located at the upper end of the drainage manifold 1 and is connected to the lower end of the drainage riser 2 on the upper floor. The lower riser connection 30 is located at the lower end of the drainage manifold 1 and is connected to the upper end of the drainage riser 2 on the lower floor. The horizontal branch pipe connection 40 is located on the upper side of the drainage manifold 1 and is connected to the end of the horizontal branch pipe 3.

[0037] As a result, in the drainage system S1, wastewater from the upper floors flowing through the upper-side drain riser 2 flows from the upper-side riser connection 20 into the drain manifold 1, and then flows down to the lower floors via the lower-side drain riser 2 connected to the lower-side riser connection 30 of the drain manifold 1. In addition, wastewater flowing through the horizontal branch pipe 3 flows from the horizontal branch pipe connection 40 into the drain manifold 1, where it merges with the wastewater from the upper floors, and then flows down to the lower floors via the lower-side drain riser 2.

[0038] Furthermore, the drainage system S1 may include components other than the drainage manifold 1, drainage riser 2, and lateral branch pipes 3, and is not limited to the configuration shown in Figure 1. The drainage system S1 may have any configuration as long as it includes the drainage manifold 1 and drainage riser 2.

[0039] (Drainage collection pipe) Figure 2 is a perspective view showing the schematic configuration of the drainage manifold 1. Figure 3 is a top view showing the schematic configuration of the drainage manifold 1. Figure 4 is a cross-sectional view showing the cross-section of the drainage manifold 1 cut along the line IV-IV in Figure 3.

[0040] As shown in Figures 2 to 4, the drainage manifold 1 has a pipe body 10, an upper riser pipe connection 20, a lower riser pipe connection 30, and a lateral branch pipe connection 40. In this embodiment, the drainage manifold 1 is mainly made of resin material. The drainage manifold 1 may be formed as a single unit by injection molding or the like, or it may be made up of multiple parts.

[0041] The main pipe body 10 is formed in a substantially cylindrical shape extending along the axis P1. The upper riser connection 20, the lower riser connection 30, and the lateral branch pipe connection 40 are also each formed in a cylindrical shape. The upper riser connection 20 is connected to the upper end of the main pipe body 10. The lower riser connection 30 is connected to the lower end of the main pipe body 10. The lateral branch pipe connection 40 is connected to the upper side of the main pipe body 10. In this embodiment, the three lateral branch pipe connection 40 are each connected to the main pipe body 10 at positions 90 degrees apart when viewed axially from the main pipe body 10. Furthermore, the three lateral branch pipe connection 40 are connected to the main pipe body 10 at the same axial position relative to the main pipe body 10. The upper riser connection 20, the lower riser connection 30, and the lateral branch pipe connection 40 are each connected to the main pipe body 10 so as to connect to the internal space of the main pipe body 10.

[0042] In this embodiment, the upper riser pipe connection 20 is constructed separately from the pipe body 10 and is connected to the upper end of the pipe body 10. The lateral branch pipe connection 40 is also constructed separately from the pipe body 10 and is connected to the upper side of the pipe body 10. The lower riser pipe connection 30 is formed integrally with the pipe body 10. The upper riser pipe connection 20 and the lateral branch pipe connection 40 may be provided integrally with the pipe body 10. The lower riser pipe connection 30 may be constructed separately from the pipe body 10 and connected to the pipe body 10.

[0043] The pipe body 10 has a reduced diameter section 11 at its lower end, where the inner and outer diameters gradually decrease from the axial central portion toward the lower end. The lower riser connection section 30 is connected to the lower end of the reduced diameter section 11. A pipe body cover 12, including a vibration insulator and sound insulation cover made of fire-resistant inorganic fibers, is provided on the outer circumferential surface of the axial central portion and the lower part of the pipe body 10.

[0044] Furthermore, the pipe body 10 has multiple (three in this embodiment) branch pipe connection openings 13 at its upper part, to which the branch pipe connection parts 40 are connected. The branch pipe connection openings 13 protrude cylindrically from the outer circumferential surface of the upper part of the pipe body 10. The branch pipe connection parts 40 are connected to the branch pipe connection openings 13. The inner diameter of the upper part of the pipe body 10 is smaller than the inner diameter of the central part in the axial direction.

[0045] The drainage manifold 1 has one swirling vane 14, one flow deflection plate 15, multiple backflow prevention plates 16, and ribs 17. The swirling vane 14, the flow deflection plate 15, the multiple backflow prevention plates 16, and the ribs 17 are each provided on the pipe body 10.

[0046] The swirl vanes 14 are provided on the inner circumferential surface of the pipe body 10 and below the lateral branch pipe connection portion 40. The swirl vanes 14 are formed in a flat plate shape that extends diagonally with respect to the axis P1 when viewed radially across the pipe body 10. The swirl vanes 14 are provided on the inner surface of the pipe body 10 so as to extend from the axial central portion to the reduced diameter portion 11. The upper protrusion width of the swirl vanes 14 relative to the inner circumferential surface of the pipe body 10 is greater than the lower protrusion width. Such swirl vanes 14 improve the drainage performance of the drainage manifold 1 by imparting a swirling force to the wastewater flowing inside the pipe body 10, thereby generating a swirling flow.

[0047] The flow deflector 15 is provided on the inner circumferential surface of the pipe body 10 in a portion where the opening 13 for connecting the lateral branch pipe is not provided, and at a position axially below the opening 13 for connecting the lateral branch pipe when viewing the pipe body 10 radially. The flow deflector 15 is provided on the inner circumferential surface of the pipe body 10 at a position axially below the rib 17, described later, provided on the outer circumferential surface of the pipe body 10 when viewing the pipe body 10 radially. The flow deflector 15 is formed as a flat plate extending diagonally with respect to the axis P1 of the pipe body 10 when viewing the pipe body 10 radially. More specifically, the flow deflector 15 is curved and protrudes toward the center of the circular internal space of the pipe body 10 when viewed in the axial direction. That is, the protruding end of the flow deflector 15 that protrudes into the internal space of the pipe body 10 is straight when viewing the pipe body 10 in the axial direction.

[0048] The flow deflection plate 15, having the configuration described above, deflects and slows down the wastewater flowing from the drain riser 2 into the pipe body 10, thereby improving the drainage performance of the drain manifold 1.

[0049] In this embodiment, as described above, the swirling vanes 14 and the flow deflection plates 15, which are provided on the inner circumferential surface of the pipe body 10 and straighten the flow of wastewater from the pipe body 10, are included in the wastewater straightening section 50.

[0050] Multiple backflow prevention plates 16 are provided on the inner circumferential surface of the upper part of the pipe body 10, adjacent to the circumferential branch pipe connection openings 13, so as to protrude inward from the pipe body 10. Some of the multiple backflow prevention plates 16 are provided on the inner circumferential surface of the upper part of the pipe body 10, between adjacent lateral branch pipe connection openings 13. The backflow prevention plates 16 are flat and have a length greater than the opening of the lateral branch pipe connection openings 13 in the axial direction of the pipe body 10. With backflow prevention plates 16 having this configuration, it is possible to prevent wastewater that has flowed from the lateral branch pipe 3 into the drainage manifold 1 via the lateral branch pipe connection openings 13 from flowing back into the adjacent lateral branch pipe 3.

[0051] Multiple ribs 17 are provided on the outer circumferential surface of the upper part of the pipe body 10, at the same axial position as the lateral branch pipe connection opening 13, and in the portion where the lateral branch pipe connection opening 13 is not provided, so as to protrude radially outward at predetermined intervals in the axial direction. Multiple ribs 17 are flat plates having the shape of a part of an annular ring, and are provided on the outer circumferential surface of the upper part of the pipe body 10, parallel to each other in the axial direction. As described above, a flow deflection plate 15 is provided on the inner circumferential surface of the pipe body 10 and at a position axially lower than the multiple ribs 17. Therefore, by providing multiple ribs 17 having the above configuration on the outer circumferential surface of the pipe body 10, vibrations or noise generated when wastewater hits the flow deflection plate 15 can be reduced.

[0052] (Connection between drain manhole and drain riser) In this embodiment, the drain manifold 1 and the drain riser 2 are connected such that the axis P2 of the drain riser 2 connected to the drain manifold 1 is offset (inclined) with respect to the axis P1 of the drain manifold 1. For example, the axis P2 of the drain riser 2 is inclined at an angle of 1.5 degrees or less with respect to the axis P1 of the drain manifold 1 to which the drain riser 2 is connected.

[0053] Figures 5 and 6 show an example where the axis P2 of the drain riser pipe 2 is offset from the axis P1 of the drain manifold pipe 1 to which the drain riser pipe 2 is connected. Figure 5 is a cross-sectional view of the drain manifold pipe 1 and drain riser pipe 2 when cut in a plane containing axes P1 and P2. Figure 6 shows a cross-section of the drain riser pipe 2 and the drain manifold pipe 1 cut along the line VI-VI in Figure 5. Note that, for explanatory purposes, the floor slab X of building T is not shown in Figures 5 and 6.

[0054] As shown in Figures 5 and 6, the swirl vanes 14 of the drain manifold 1 are positioned on the inner circumferential surface of the pipe body 10 and intersect with the extension of the axis P2 of the drain riser pipe 2. That is, the position of the swirl vanes 14 in the axial direction of the drain manifold 1, the position of the swirl vanes 14 in the circumferential direction of the drain manifold 1, and the amount of protrusion of the swirl vanes 14 from the inner circumferential surface of the pipe body 10 are determined so as to intersect with the extension of the axis P2 of the drain riser pipe 2. For example, it is preferable that the swirl vanes 14 be located below the axial center of the pipe body 10. Also, for example, it is preferable that the amount of protrusion of the swirl vanes 14 is smaller than the radius of the drain riser pipe 2.

[0055] With the above configuration, drainage can be directed from the drain riser 2 towards the swivel vane 14, as indicated by the arrows in Figures 5 and 6. Therefore, more drainage can be guided from the drain riser 2 to the swivel vane 14. Consequently, the drainage performance of the drainage system S1 can be improved.

[0056] In the cross-section shown in Figure 6, when viewing the drainage manifold 1 in the axial direction of the drainage riser 2, the area of ​​the swirling vane 14 that overlaps with the internal space inside the drainage riser 2 increases as the amount of deviation of the axis P2 of the drainage riser 2 with respect to the extension of the axis P1 of the drainage manifold 1 (the inclination of the axis P2 of the drainage riser 2 with respect to the axis P1 of the drainage manifold 1) increases. Therefore, the larger the amount of deviation, the more the drainage performance of the drainage system S1 can be improved.

[0057] Furthermore, as shown in Figure 5 above, if the axis P2 of the drain riser pipe 2 is misaligned with the axis P1 of the drain manifold pipe 1 to which the drain riser pipe 2 is connected, it is preferable that the upper part of the pipe body 10 is configured such that the maximum misalignment Q of the axis P2 of the drain riser pipe 2 with respect to the extension of the axis P1 of the drain manifold pipe 1 is less than or equal to half the inner diameter of the drain riser pipe 2, when viewed in the axial direction of the drain riser pipe 2. The maximum misalignment Q is the horizontal distance between the extension of the axis P1 and the axis P2 at the upper end of the drain riser pipe 2. Furthermore, it is preferable that the inner diameter of the drain riser pipe 2 is the inner diameter of the straight pipe portion.

[0058] This ensures a ventilation space for the wastewater flowing from the drain riser 2 to the drain manifold 1. Therefore, a configuration that improves the drainage performance of the drainage system S1 can be realized.

[0059] As described above, the drainage manifold 1 of this embodiment has a pipe body 10 and at least one branch pipe connection part 40 for connecting a branch pipe 3 to the pipe body 10, and is a resin pipe that is installed so that the pipe body 10 penetrates the floor slab X of the building T. This drainage manifold 1 has a drainage straightening part 50 provided on the inner circumferential surface of the pipe body 10, which straightens the flow of drainage in the pipe body 10. The drainage straightening part 50 is located at a predetermined position relative to the extension of the axis P2 of the drainage riser 2, with respect to the extension of the axis P2 of the drainage riser 2, when the drainage riser 2 that carries drainage from the upper floor is connected to the upper part of the pipe body 10 so that it is inclined with respect to the axis of the pipe body 10, in order to improve the drainage performance of the drainage manifold 1.

[0060] As described above, with the drain riser pipe 2 connected to the upper part of the pipe body 10 of the drain manifold pipe 1 at an angle to the axis P1 of the pipe body 10, the drain flow straightening section 50 provided on the inner circumferential surface of the pipe body 10 is positioned at a predetermined location relative to the extension of the axis P2 of the drain riser pipe 2, when viewed axially from the drain manifold pipe 1, in order to improve the drainage performance of the drain manifold pipe 1. This allows the wastewater flowing from the drain riser pipe 2 into the drain manifold pipe 1 to flow smoothly. This improves the drainage performance of the drainage system S1.

[0061] In this embodiment, the predetermined position is on the inner circumferential surface of the pipe body 10 and intersects with the extension of the axis P2 of the drain riser pipe 2.

[0062] In other words, in this embodiment, the drainage straightening section 50 is located on the inner circumferential surface of the pipe body 10 at a position where the extension of the axis P2 of the drainage riser 2 intersects it. As a result, the amount of drainage guided from the drainage riser 2 to the drainage straightening section is increased. Therefore, the drainage performance of the drainage system S1 can be further improved.

[0063] [Embodiment 2] Figures 7 and 8 show a schematic configuration of a drainage system S2 having a drainage manifold 1 according to Embodiment 2. In this embodiment, the positional relationship between the drainage manifold 1 and the drainage riser 2 differs from that of Embodiment 1. In the following, components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted, and only the parts that differ from Embodiment 1 will be described.

[0064] Figure 7 is a cross-sectional view of the drainage manifold 1 and drainage riser 2 when cut along a plane containing axes P1 and P2. Figure 8 is a cross-sectional view showing the cross-section of the drainage riser 2 and the drainage manifold 1 when cut along the line VIII-VIII in Figure 7. Note that, for explanatory purposes, the floor slab X of building T is not shown in Figures 7 and 8.

[0065] As shown in Figures 7 and 8, the flow deflector 15 of the drain manifold 1 is provided on the inner circumferential surface of the pipe body 10, and at a position where it coincides with the extension of the axis P2 of the drain riser pipe 2 when viewed axially across the drain manifold 1. That is, the position of the flow deflector 15 in the axial direction of the drain manifold 1, the position of the flow deflector 15 in the circumferential direction of the drain manifold 1, and the amount of protrusion of the flow deflector 15 from the inner circumferential surface of the pipe body 10 are determined so that they coincide with the extension of the axis P2 of the drain riser pipe 2 when viewed axially across the drain manifold 1. For example, it is preferable that the flow deflector 15 be located below the lateral branch pipe connection portion 40 of the pipe body 10. Also, for example, it is preferable that the amount of protrusion of the flow deflector 15 coincides with the extension of the axis P2 of the drain riser pipe 2 when viewed axially across the drain manifold 1.

[0066] In this embodiment, the predetermined position is on the inner circumferential surface of the pipe body 10, and is the position where the extension of the axis P2 of the drain riser pipe 2 overlaps when viewed axially along the drain manifold pipe 1. In this case, it includes not only the position where the extensions of the axis P2 of the drain riser pipe 2 intersect, but also, as shown in Figures 5 and 6, the case where the extensions of the axis P2 do not intersect, but overlap when viewed axially along the drain manifold pipe 1.

[0067] With the above configuration, drainage can be directed from the drain riser 2 towards the flow deflector 15, as indicated by the arrows in Figures 7 and 8. Therefore, the amount of drainage guided from the drain riser 2 to the flow deflector 15 can be increased. Consequently, the drainage performance of the drainage system S2 can be further improved.

[0068] In the cross-section shown in Figure 8, when viewing the drainage manifold 1 in the axial direction of the drainage riser 2, the area of ​​the flow deflection plate 15 that overlaps with the internal space inside the drainage riser 2 increases as the amount of deviation of the axis P2 of the drainage riser 2 with respect to the extension of the axis P1 of the drainage manifold 1 (the inclination of the axis P2 of the drainage riser 2 with respect to the axis P1 of the drainage manifold 1) increases. Therefore, the larger the amount of deviation, the more the drainage performance of the drainage system S2 can be improved.

[0069] Furthermore, as shown in Figure 7 above, if the axis P2 of the drain riser pipe 2 is offset from the axis P1 of the drain manifold pipe 1 connected to the drain riser pipe 2, it is preferable that the upper part of the pipe body 10 is configured such that the maximum amount of offset Q of the axis P2 of the drain riser pipe 2 with respect to the extension of the axis P1 of the drain manifold pipe 1 is less than or equal to half the inner diameter of the drain riser pipe 2, when viewed in the axial direction of the drain riser pipe 2. The maximum amount of offset Q is the horizontal distance between the extension of the axis P1 and the axis P2 at the upper end of the drain riser pipe 2. Furthermore, it is preferable that the inner diameter of the drain riser pipe 2 be the inner diameter of the straight pipe portion.

[0070] This ensures a ventilation space for the wastewater flowing from the drain riser 2 to the drain manifold 1. Therefore, a decrease in the drainage capacity of the drainage system S2 can be suppressed.

[0071] Based on the above, in this embodiment, the drainage straightening section 50 is located on the inner circumferential surface of the pipe body 10, when viewed axially from the drainage manifold 1, at a position where the extension of the axis P2 of the drainage riser 2 coincides. As a result, more drainage is guided from the drainage riser 2 to the drainage straightening section. Therefore, the drainage performance of the drainage system S2 can be improved.

[0072] [Embodiment 3] Figures 9 and 10 show a schematic configuration of a drainage system S3 having a drainage manifold 1 according to Embodiment 3. In this embodiment, the positional relationship between the drainage manifold 1 and the drainage riser 2 differs from that of Embodiment 1. In the following, components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted, and only the parts that differ from Embodiment 1 will be described.

[0073] Figure 9 is a cross-sectional view of the drainage manifold 1 and drainage riser 2 when cut along a plane containing axes P1 and P2. Figure 10 shows a cross-section of the drainage riser 2 and drainage manifold 1 cut along line XX in Figure 9. Note that in Figures 9 and 10, the floor slab X of building T is omitted for explanatory purposes.

[0074] As shown in Figures 9 and 10, the drainage straightening section 50, including the swirling vanes 14 and the flow deflection plate 15 of the drainage manifold 1, is positioned on the inner circumferential surface of the pipe body 10, and in a location where it does not overlap with the extension of the axis P2 of the drainage riser pipe 2 when viewed in the axial direction of the drainage manifold 1. That is, the position of the drainage straightening section 50 in the axial direction of the drainage manifold 1, the position of the drainage straightening section 50 in the circumferential direction of the drainage manifold 1, and the amount of protrusion of the drainage straightening section 50 from the inner circumferential surface of the pipe body 10 are determined so that they do not overlap with the extension of the axis P2 of the drainage riser pipe 2 when viewed in the axial direction of the drainage manifold 1.

[0075] In this embodiment, the predetermined position is on the inner circumferential surface of the pipe body 10, and is a position where the extension of the axis P2 of the drain riser pipe 2 does not overlap when viewed axially along the drain manifold pipe 1. Therefore, naturally, at this position, the axis P2 of the drain riser pipe 2 does not intersect the drain straightening section 50.

[0076] With the above configuration, as shown by the arrows in Figures 9 and 10, drainage can be guided from the drain riser 2 towards the part of the drain manifold 1 other than the drainage straightening section 50. Therefore, since less drainage flows from the drain riser 2 to the drainage straightening section 50, noise generated by drainage hitting the swirling vanes 14 and the flow deflection plate 15 can be reduced.

[0077] In the cross-section shown in Figure 10, when viewing the drainage manifold 1 in the axial direction of the drainage riser 2, the area of ​​the drainage straightening section 50 that overlaps with the internal space within the drainage riser 2 becomes smaller as the amount of deviation of the axis P2 of the drainage riser 2 with respect to the extension of the axis P1 of the drainage manifold 1 (the inclination of the axis P2 of the drainage riser 2 with respect to the axis P1 of the drainage manifold 1) increases. Therefore, the larger the amount of deviation, the greater the noise reduction.

[0078] Furthermore, as shown in Figure 9 above, if the axis P2 of the drain riser pipe 2 connected to the drain manifold pipe 1 is misaligned with the axis P1 of the drain manifold pipe 1, it is preferable that the upper part of the pipe body 10 is configured such that the maximum misalignment Q of the axis P2 of the drain riser pipe 2 with respect to the extension of the axis P1 of the drain manifold pipe 1 is less than or equal to half the inner diameter of the drain riser pipe 2, when viewed in the axial direction of the drain riser pipe 2. The maximum misalignment Q is the horizontal distance between the extension of the axis P1 and the axis P2 at the upper end of the drain riser pipe 2. Furthermore, it is preferable that the inner diameter of the drain riser pipe 2 is the inner diameter of the straight pipe portion.

[0079] Based on the above, in this embodiment, the drainage straightening section 50 is positioned on the inner circumferential surface of the pipe body 10, when viewed in the axial direction of the drainage manifold 1, at a position that does not overlap with the extension of the axis P2 of the drainage riser 2. As a result, less drainage flows from the drainage riser 2 to the drainage straightening section 50, thereby reducing the noise generated by the drainage straightening section 50. Thus, the drainage performance of the drainage system S3 can be improved.

[0080] (Other embodiments) Although embodiments of the present invention have been described above, the embodiments described above are merely examples for carrying out the present invention. Therefore, the invention is not limited to the embodiments described above, and it is possible to carry out the invention by appropriately modifying the embodiments described above without departing from the spirit of the invention.

[0081] In each of the above embodiments, the drainage rectifier 50 includes a swirling vane 14 and a flow deflection plate 15. However, the drainage rectifier may include only one of the swirling vane or the flow deflection plate, or it may not include both. The drainage rectifier may include components other than the swirling vane and flow deflection plate, as long as they are configured to rectify the flow of wastewater within the pipe body of the drainage manifold.

[0082] In each of the above embodiments, the three lateral branch pipe connections 40 are each connected to the pipe body 10 at positions 90 degrees apart when viewed in the axial direction of the pipe body 10. However, the pipe body may have two or fewer lateral branch pipe connections connected to it. The pipe body may not have any lateral branch pipe connections connected to it. Furthermore, the spacing between the lateral branch pipe connections connected to the pipe body may be at angles other than 90 degrees when viewed in the axial direction of the pipe body.

[0083] In each of the above embodiments, the multiple lateral branch pipe connections 40 are connected to the pipe body 10 at the same axial position. However, the multiple lateral branch pipe connections may be connected to the pipe body at different axial positions.

[0084] In each of the above embodiments, the branch pipe connection portion 40 is connected to the branch pipe connection opening 13 provided in the main pipe body 10. However, the branch pipe connection portion may be directly connected to the main pipe body.

[0085] In each of the above embodiments, the drainage manifold 1 has one swirl vane 14 and one flow deflection plate 15. However, the drainage manifold may have multiple swirl vanes. The drainage manifold may have multiple flow deflection plates. The drainage manifold may not have swirl vanes. The drainage manifold may not have flow deflection plates.

[0086] In each of the above embodiments, the swirling vane 14 is provided on the inner circumferential surface of the pipe body 10 and below the lateral branch pipe connection portion 40, extending from the axial central portion to the reduced diameter portion 11, and is a flat plate shape that extends diagonally with respect to the axis P1 when viewed radially across the pipe body 10. However, the swirling vane may be provided on other parts of the inner circumferential surface of the pipe body. Furthermore, the shape of the swirling vane may differ from the shape described in the above embodiments, as long as it can impart a swirling force to the wastewater flowing inside the pipe body and generate a swirling flow.

[0087] In each of the above embodiments, the flow deflection plate 15 is formed as a flat plate extending diagonally with respect to the axis P1 of the pipe body 10 when viewed radially, at a position on the inner circumferential surface of the pipe body 10 where the opening 13 for connecting the lateral branch pipe is not provided, and at a position axially below the opening 13 for connecting the lateral branch pipe. However, the flow deflection plate may be provided at other parts of the inner circumferential surface of the pipe body. Furthermore, the shape of the flow deflection plate may differ from the shape described in the above embodiments, as long as it can improve the drainage performance of the drainage system including the drainage manifold by deflecting and slowing down the drainage flowing through the pipe body.

[0088] In each of the above embodiments, the drainage manifold 1 has a plurality of backflow prevention plates 16 and ribs 17. However, the drainage manifold may have only one backflow prevention plate. The drainage manifold may not have any backflow prevention plates. The drainage manifold may not have any ribs.

[0089] In each of the above embodiments, the upper part of the pipe body 10 is configured such that, when viewed axially through the drain riser 2, the maximum deviation Q of the axis P2 of the drain riser 2 with respect to the extension of the axis P1 of the drain manifold 1 is less than or equal to half the inner diameter of the drain riser 2. However, the maximum deviation of the axis of the drain riser with respect to the extension of the axis of the drain manifold may be greater than half the inner diameter of the drain riser 2.

[0090] In the first embodiment described above, a swirling vane 14 was described as an example of the drainage flow straightening section 50. That is, the swirling vane 14 is provided on the inner circumferential surface of the pipe body 10 and at a position that intersects with the extension of the axis P2 of the drainage riser pipe 2. However, a flow deflection plate may also be provided as the drainage flow straightening section on the inner circumferential surface of the pipe body and at a position that intersects with the extension of the axis of the drainage riser pipe. Furthermore, the drainage flow straightening section may have a configuration other than a swirling vane and a flow deflection plate.

[0091] In the above embodiment 2, a flow deflection plate 15 was described as an example of the drainage flow straightening section 50. That is, the flow deflection plate 15 is provided on the inner circumferential surface of the pipe body 10 and at a position where it overlaps with the extension of the axis P2 of the drainage riser pipe 2 when viewed in the axial direction of the drainage manifold pipe 1. However, a swirling vane may also be provided as a drainage flow straightening section on the inner circumferential surface of the pipe body and at a position where it overlaps with the extension of the axis of the drainage riser pipe when viewed in the axial direction of the drainage manifold pipe. Furthermore, the drainage flow straightening section may have a configuration other than a swirling vane and a flow deflection plate. [Industrial applicability]

[0092] The present invention is applicable to a resin drainage manifold having a pipe body and at least one branch pipe connection portion for connecting a branch pipe to the pipe body, wherein the pipe body is routed so as to penetrate the floor slab of a building. [Explanation of Symbols]

[0093] 1 Drainage collection pipe 2 Drain standpipe 3 Lateral branch pipe 10 Pipe body 11 Reduced diameter part 12 Pipe body cover 13. Opening for connecting lateral branch pipes 14 Swivel blades 15 Straight plate 16. Check valve 17 Ribs 20 Upper riser pipe connection 30 Lower riser connection 40. Horizontal branch pipe connection 50 Drainage rectifier T Building S1, S2, S3 drainage system X Floor slab X1 through hole P1 Axis of the drainage manifold P2 Axis of the drain riser Q: Maximum displacement

Claims

1. A resin drainage manifold having a pipe body and at least one branch pipe connection portion for connecting a branch pipe to the pipe body, wherein the pipe body is installed so as to penetrate the floor slab of a building, The pipe body has a drainage straightening section provided on its inner circumferential surface, which straightens the flow of drainage from the pipe body. The aforementioned drainage rectification section is, With the drain riser that carries wastewater from the upper floor connected to the upper part of the pipe body such that it is inclined with respect to the axis of the pipe body, On the inner circumferential surface of the pipe body, a predetermined position is located with respect to the extension of the axis of the drain riser pipe to improve the drainage performance of the drain manifold pipe, The drainage straightening section is positioned such that, when viewing the drainage manifold in a cross-section including the axis of the drainage riser, the extension of the axis of the drainage riser intersects the inner circumferential surface of the pipe body. Drainage collection pipe.

2. In the drainage manifold according to claim 1, The drainage straightening section is located on the inner circumferential surface of the pipe body, when viewed in the axial direction of the drainage manifold, at a position where the extension of the axis of the drainage riser coincides with it. Drainage collection pipe.

3. In the drainage manifold according to claim 1, The drainage flow straightening section is provided on the inner circumferential surface of the pipe body and includes a swirling vane that generates a swirling flow in the drainage flowing inside the pipe body with respect to the axis of the pipe body. Drainage collection pipe.

4. In the drainage manifold according to claim 3, The drainage straightening section is located upstream of the swirling vane on the inner circumferential surface of the pipe body and further includes a flow deflection plate that changes the direction of drainage flow. Drainage collection pipe.

5. In the drainage manifold according to claim 1, The upper part of the pipe body is configured such that, when viewing the drain riser in the axial direction, the maximum displacement, which is the horizontal distance between the extension of the axis of the drain manifold at the upper end of the drain riser and the axis of the drain riser, is less than or equal to half the inner diameter of the drain riser. Drainage collection pipe.

6. A drainage system used in a building with multiple floors, A drainage manifold according to any one of claims 1 to 5, A horizontal branch pipe is connected to the horizontal branch pipe connection of the aforementioned drainage manifold, through which the drainage from each floor flows. A drain riser is connected to the main body of the aforementioned drainage manifold, through which drainage from the upper floor flows. Having, Drainage system.

7. A building having the drainage system described in claim 6.

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