Projection member, piping member, and piping system

Abstract

To provide a projection member capable of improving the flow rate while downsizing, a piping member, and a piping system.SOLUTION: A projection member 6 is placed in a straight pipe (vertical pipe 3), which is placed at the downstream side of a bent pipe (second bent pipe 52) for changing the flow path direction, to partially reduce the cross-sectional area of the flow path. The projection member 6 includes a first surface 60a having an outer periphery 601 that is capable of contacting the inner periphery of a straight pipe and a second surface 60b that is located on the opposite side of the first surface 60a and acts on the fluid flowing through the flow path. The outer periphery 601 has a groove 603 that is formed along at least a part of the outer periphery of the first surface 60a.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present disclosure relates to a protrusion member, a piping member, and a piping system. [Background technology]

[0002] Patent Document 1 discloses a siphon gutter system. The siphon gutter system disclosed in Patent Document 1 includes an eaves gutter, a siphon generating section that has a cylindrical section penetrating a water collection port formed on the bottom surface of the eaves gutter and that generates a siphon phenomenon, and an elbow. The elbow is installed downstream of the siphon gutter system. The elbow includes a curved pipe section and receiving ports provided on both ends of the curved pipe section. When viewed in cross section on a plane including the pipe axis of the curved pipe section, the radius of curvature of the inner peripheral surface on the inner periphery side is greater than 64 mm and less than 100 mm. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-120068 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 is expected to improve the flow rate, but the elbow becomes relatively large.

[0005] The present disclosure provides a protrusion member, a piping member, and a piping system that can improve flow rate while enabling miniaturization. [Means for solving the problem]

[0006] A protrusion member according to one embodiment of the present disclosure is a protrusion member that is placed within a straight pipe located downstream of a curved pipe that changes the direction of the flow path, thereby partially reducing the flow path cross-sectional area of ​​the straight pipe, and is provided with a first surface having an outer periphery that can contact the inner periphery of the straight pipe, and a second surface that is located opposite the first surface and acts on the fluid flowing through the flow path, and the outer periphery has a groove that follows at least a portion of the outer periphery of the first surface.

[0007] A protrusion member according to one embodiment of the present disclosure is a protrusion member that is placed within a straight pipe located downstream of a curved pipe that changes the direction of the flow path, thereby partially reducing the flow path cross-sectional area of ​​the straight pipe, and is provided with a first surface facing the inner peripheral surface of the straight pipe, and a second surface that is located opposite the first surface and acts on the fluid flowing through the flow path, and the first surface includes an outer peripheral portion that can contact the inner peripheral surface, and a central portion that is recessed from the outer peripheral portion.

[0008] A protrusion member according to one embodiment of the present disclosure is a protrusion member that is placed within a straight pipe that is located downstream of a bent pipe that changes the direction of the flow path, and that partially reduces the flow path cross-sectional area of ​​the straight pipe, and has a first surface facing the inner surface of the straight pipe, and a second surface that is on the opposite side of the first surface and acts on the fluid flowing through the flow path, and has a first section on the first end side in a second direction that is perpendicular to the first direction in which the first surface and the second surface face each other, and a second section on the second end side in the second direction that are separate bodies, and the second section has a protrusion on the first surface side of the second section that extends toward the first end, and the first section has a recess on the first surface side of the first section into which the protrusion fits, and the protrusion and recess are located in a position recessed from the portion of the first surface that can contact the inner surface.

[0009] A piping member according to one aspect of the present disclosure includes the above-described protruding member and a straight pipe, wherein the protruding member is fixed to the straight pipe with an adhesive.

[0010] A piping system according to one aspect of the present disclosure includes a vertical pipe, a horizontal pipe between the inlet and the vertical pipe, a first bent pipe between the water collection port and the horizontal pipe, a second bent pipe between the horizontal pipe and the vertical pipe, and the above-mentioned protruding member arranged such that at least a portion of the vertical pipe is a straight pipe. The protruding member is fixed to the straight pipe with an adhesive. [Effects of the Invention]

[0011] Aspects of the present disclosure can improve flow rates while allowing for compactness. [Brief explanation of the drawings]

[0012] [Figure 1] Schematic diagram of a piping system according to an embodiment. [Figure 2] 1 is a cross-sectional view of a first bent pipe of a piping system according to an embodiment; [Figure 3] 10 is a cross-sectional view of a second bent pipe of the piping system according to the embodiment; [Figure 4] FIG. 1 is a perspective view of a piping member of a piping system according to an embodiment; [Figure 5] 1 is an exploded perspective view of a piping member according to an embodiment of the present invention; [Figure 6] 1 is a cross-sectional view of a piping member according to an embodiment of the present invention; [Figure 7] Enlarged view of P1 in Figure 6 [Figure 8] Cross section of line AA in Figure 6 [Figure 9] 1 is a partially cutaway cross-sectional view of a piping member according to an embodiment of the present invention; [Figure 10] FIG. 1 is a plan view of a piping member according to an embodiment; [Figure 11] 1 is a bottom view of a piping member according to an embodiment of the present invention; [Figure 12] Cross section of Figure 8 along line XX [Figure 13] Cross section of line XI-XI in Figure 8 [Figure 14] Cross section of Figure 8 taken along line XII-XII [Figure 15] Cross section of line XIII-XIII in Figure 8 [Figure 16] FIG. 2 is a view of the protruding member of the piping member according to the embodiment, viewed from the second surface. [Figure 17] FIG. 1 is a view of a protruding member of a piping member according to an embodiment, viewed from a first surface. [Figure 18] FIG. 1 is a view of a protruding member of a piping member according to an embodiment, viewed from a first end. [Figure 19] 1 is a view of a protruding member of a piping member according to an embodiment, viewed from a second end; [Figure 20]1 is an exploded perspective view of a protruding member according to an embodiment of the present invention; [Figure 21] FIG. 10 is another exploded perspective view of the protrusion member according to the embodiment; [Figure 22] FIG. 10 is a side view of a first portion of the protrusion member according to the embodiment; [Figure 23] FIG. 10 is a side view of a second portion of the protruding member according to the embodiment; [Figure 24] 1 is a cross-sectional view of a protruding member according to an embodiment of the present invention; [Figure 25] 1 is an explanatory diagram of attachment of a protruding member according to an embodiment; [Figure 26] 1 is an explanatory diagram of the installation of a piping member according to an embodiment; [Figure 27] 10 is a diagram showing a simulation of pressure distribution in a piping member of a comparative example; [Figure 28] 1 is a comparison diagram of a protrusion member according to an embodiment and a basic shape. [Figure 29] Graph showing the change in pressure loss due to the protrusion member according to the embodiment compared to the basic shape DETAILED DESCRIPTION OF THE INVENTION

[0013] [1. Embodiment] Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Note that the inventor(s) provide the accompanying drawings and the following description to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0014] Unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Each drawing described in the following embodiments is a schematic drawing, and the ratios of the size and thickness of each component in each drawing do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each component are not limited to the ratios shown in the drawings.

[0015] In the following description, when it is necessary to distinguish between multiple components, prefixes such as "first" and "second" are added to the names of the components. However, when the components can be distinguished from each other by the symbols attached to them, the prefixes such as "first" and "second" may be omitted in consideration of readability of the text.

[0016] [1.1 Configuration] FIG. 1 is a schematic diagram of a piping system 1 according to an embodiment. The piping system 1 is used to transport a fluid with a Reynolds number of 4000 or greater. A fluid with a Reynolds number of 4000 or greater is considered to be a fluid whose flow within a cylinder becomes turbulent. Examples of such fluids include liquids (drinking water, heat source water, wastewater, oil, etc.), gases (air, steam, etc.), and gas-liquid two-phase flow (a mixture of liquid and gas). In this embodiment, the piping system 1 is used as a drainage system. The piping system 1 is a rain gutter system that receives rainwater from the roof 11a of a building 11 and channels it to a manhole 21 on the ground 20. The piping system 1 forms a rainwater flow path. The rainwater collected in the manhole 21 flows from the manhole 21 through an underground pipe 22 and into a storm sewer. The building 11 may be, for example, a non-residential facility such as a store, office, factory, building, school, welfare facility, or hospital, or a residential facility such as a detached house, an apartment building, or each dwelling unit of a detached house or apartment building. Non-residential facilities also include theaters, movie theaters, public halls, amusement parks, complexes, department stores, hotels, inns, kindergartens, libraries, museums, art galleries, underground shopping malls, stations, and airports.

[0017] The piping system 1 includes an eaves gutter 2, a vertical pipe 3, a horizontal pipe 4, a first bent pipe 51, a second bent pipe 52, a protruding member 6, and a drain 7.

[0018] The eaves gutter 2 collects rainwater from the roof 11a of the building 11. The eaves gutter 2 is installed under the roof 11a of the building 11. As an example, the eaves gutter 2 is arranged at the eaves edge of the roof 11a. In particular, the eaves gutter 2 is arranged so as to extend along the eaves edge of the roof 11a. The eaves gutter 2 is shaped like a long bucket. The eaves gutter 2 has a bottom wall 2a. An inlet 2b is formed in the bottom wall 2a depending on the overall design of the piping system 1. The inlet 2b is, for example, a circular opening. In a rain gutter system, the inlet 2b is also referred to as a water collection inlet, a drain outlet, or a drop outlet. As an example, the eaves gutter 2 may be formed by extrusion molding of a resin material. The eaves gutter 2 may include a core material to reinforce the overall strength of the eaves gutter 2. The core material may be made of, for example, metal. As another example, the eaves gutter 2 may be formed from a metal plate, for example, a steel plate (also called a coil).

[0019] The drain 7 is disposed at the inlet 2b of the eaves gutter 2. The drain 7 reduces the generation of vortices and the entrainment of air at the inlet 2b. The drain 7 may contribute to the generation of the siphoning phenomenon. The drain 7 may have a known configuration.

[0020] In the piping system 1, the vertical pipe 3 is not directly connected to the inlet 2b, but is connected to the inlet 2b via the horizontal pipe 4, the first bent pipe 51, and the second bent pipe 52.

[0021] The standpipe 3 defines a vertical flow path. The standpipe 3 is fixed to the wall 11b of the building 11. In a gutter system, the standpipe 3 is also called a downspout. The standpipe 3 is installed to drain rainwater from the inlet 2b. The standpipe 3 allows rainwater from the inlet 2b to flow vertically. The standpipe 3 is straight. A cross section perpendicular to the central axis C3 of the standpipe 3 is circular. The standpipe 3 is arranged so that the direction of the central axis C3 of the standpipe 3 coincides with the up-down direction (vertical direction). The standpipe 3 has an upstream end 3a and a downstream end 3b. The upstream end 3a is the end of the standpipe 3 that is connected to the inlet 2b (the upper end in FIG. 1). The downstream end 3b is the end of the standpipe 3 that is inserted into the manhole 21 (the lower end in FIG. 1). In FIG. 1, a pipe cover 34 is arranged to prevent rainwater from flowing into the manhole 21 through a gap between the upright pipe 3 and the manhole 21.

[0022] The vertical pipe 3 is composed of multiple pipe materials. The vertical pipe 3 includes straight pipes 31 and 32 and a connecting joint 33 that connects the straight pipes 31 and 32 together. The straight pipe 31 is the downstream portion of the vertical pipe 3, and the straight pipe 32 is the upstream portion of the vertical pipe 3. In this embodiment, the straight pipe 31 is longer than the straight pipe 32. A first end (upper end in FIG. 1 ) of the straight pipe 32 defines the upstream end 3a of the vertical pipe 3, a second end (lower end in FIG. 1 ) of the straight pipe 32 is connected to the first end (upper end in FIG. 1 ) of the straight pipe 31 via the connecting joint 33, and the second end (lower end in FIG. 1 ) of the straight pipe 31 defines the downstream end 3b of the vertical pipe 3.

[0023] The horizontal pipe 4 defines a flow path that intersects the vertical direction. In a gutter system, the horizontal pipe 4 is also called a call gutter. The horizontal pipe 4 is a part that allows rainwater from the building 11 to flow from the inlet 2b to the standpipe 3. The horizontal pipe 4 is located between the inlet 2b for rainwater from the building 11 and the standpipe 3. The horizontal pipe 4 is a straight pipe. The cross section perpendicular to the central axis C4 of the horizontal pipe 4 is circular. The horizontal pipe 4 is fixed so that the direction of the central axis C4 of the horizontal pipe 4 is inclined relative to the up-down direction (vertical direction). The horizontal pipe 4 has an upstream end 4a and a downstream end 4b. The upstream end 4a is the end of the horizontal pipe 4 that is connected to the inlet 2b (the left end in Figure 1). The downstream end 4b is the end of the horizontal pipe 4 that is connected to the standpipe 3 (the right end in Figure 1).

[0024] As an example, the material of the standpipe 3 and horizontal pipe 4 is rigid polyvinyl chloride. The dimensions of the standpipe 3 and horizontal pipe 4, such as the outer diameter and thickness, may be set in accordance with the standard for rigid polyvinyl chloride pipes (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipes." The dimensions of the connection fitting 33, such as the outer diameter and thickness, may be set in accordance with the standard for sockets in JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage."

[0025] Table 1 shows an example of the nominal diameter of VP rigid polyvinyl chloride pipe in the standard for rigid polyvinyl chloride pipe (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipe." In Table 1, the units for the outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are in mm.

[0026] [Table 1]

[0027] Table 2 shows an example of the nominal diameter of VU rigid polyvinyl chloride pipe in the standard for rigid polyvinyl chloride pipe (general) of JIS K 6741 "Rigid Polyvinyl Chloride Pipe." In Table 2, the units of outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are in mm.

[0028] [Table 2]

[0029] The first bent pipe 51 and the second bent pipe 52 are bent pipes that change the direction of the flow path. The first bent pipe 51 and the second bent pipe 52 are connection joints that connect flow paths that have different directions, such as a vertical pipe and a horizontal pipe.

[0030] 2 is a cross-sectional view of the first bent pipe 51. The first bent pipe 51 has a curved pipe portion (bent portion) 510 and sockets 511 and 512. The curved pipe portion 510 and the sockets 511 and 512 are formed as a continuous, integrated unit. The material of the first bent pipe 51, i.e., the material of the curved pipe portion 510, is rigid polyvinyl chloride.

[0031] The curved pipe portion 510 has openings 511a and 512a at both ends. The curved pipe portion 510 is cylindrical, but the pipe axis (center line) A51 of the curved pipe portion 510 is curved rather than linear. In other words, the curved pipe portion 510 has a curved pipe axis A51. The pipe axis A51 of the curved pipe portion 510 defines the pipe axis of the first bent pipe 51.

[0032] Figure 2 is a cross-sectional view of the first bent tube 51 on a plane including the tube axis A51 of the bent tube portion 510. The inner diameter of the bent tube portion 510 of the first bent tube 51 in Figure 2 is approximately uniform. In Figure 2, R51 indicates the radius of curvature of the tube axis A51. The radius of curvature R51 of the tube axis A51 defines the radius of curvature of the first bent tube 51. O51 indicates the center of the circle that defines the radius of curvature R51.

[0033] 2, θ51 indicates the angle between center lines C511 and C512 of openings 511a and 512a at both ends of first bent pipe 51 in a cross section taken along a plane including pipe axis A51 of first bent pipe 51. θ51 is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe fittings for drainage."

[0034] In FIG. 2, δ51 is the diameter [mm] of openings 511a, 512a of curved pipe portion 510. δ51 may be determined taking into consideration the target drainage capacity of piping system 1, etc. δ51 may be set in accordance with the standard JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage." δ51 may be set, for example, to satisfy the standard dimensions of the nominal diameter specified in JIS K 6739. According to JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage," when the nominal diameter is 75 mm, 100 mm, or 125 mm, the standard dimensions are 77.2 mm, 98.8 mm, and 125 mm.

[0035] 2, in a cross section of the first bent pipe 51 taken along a plane including the pipe axis A51, the bent pipe section 510 has an inner surface 510a on the inner circumferential side and an inner surface 510b on the outer circumferential side. The inner surfaces 510a, 510b are curved as a whole. Here, in a cross section of the first bent pipe 51 taken along a plane including the pipe axis A51, the radius of curvature of the inner surface 510a is greater than 54 mm and less than 125 mm.

[0036] The sockets 511 and 512 are provided at both ends of the curved pipe section 510. The sockets 511 and 512 are provided to connect a pipe material to the first bent pipe 51. In this embodiment, the socket 511 is connected to the upstream end 4a of the horizontal pipe 4, and the socket 512 is connected to the drain 7. The sockets 511 and 512 are cylindrical and surround the openings 511a and 512a of the curved pipe section 510, respectively. In FIG. 2, the sockets 511 and 512 have the same shape.

[0037] 2 shows D51, d51, and l51 as dimensions of the socket 511 of the first bent pipe 51. l51 is the length of the socket 511 (or the length of the socket 512) in a cross section taken along a plane including the pipe axis A51 of the curved pipe portion 510. D51 is the outer diameter [mm] of the socket 511 (or the socket 512). d51 is the inner diameter [mm] of the socket 511 (or the socket 512). The dimensions D51, d51, and l51 of the first bent pipe 51 may be set in accordance with, for example, the standard JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0038] 3 is a cross-sectional view of second bent pipe 52. Second bent pipe 52 has a curved pipe portion (bent portion) 520 and sockets 521 and 522. Bent pipe portion 520 and sockets 521 and 522 are formed as a continuous, integrated unit. The material of second bent pipe 52, i.e., the material of bent pipe portion 520, is rigid polyvinyl chloride.

[0039] The curved pipe portion 520 has openings 521a and 522a at both ends. The curved pipe portion 520 is cylindrical, but the pipe axis (center line) A52 of the curved pipe portion 520 is curved rather than linear. In other words, the curved pipe portion 520 has a curved pipe axis A52. The pipe axis A52 of the curved pipe portion 520 defines the pipe axis of the second bent pipe 52.

[0040] Figure 3 is a cross-sectional view of the second bent pipe 52 on a plane including the pipe axis A52 of the bent pipe portion 520. The inner diameter of the bent pipe portion 520 of the second bent pipe 52 in Figure 3 is approximately uniform. In Figure 3, R52 indicates the radius of curvature of the pipe axis A52. The radius of curvature R52 of the pipe axis A52 defines the radius of curvature of the second bent pipe 52. O52 indicates the center of the circle that defines the radius of curvature R52.

[0041] 3, θ52 indicates the angle between center lines C521 and C522 of openings 521a and 522a at both ends of second bent pipe 52 in a cross section taken along a plane including pipe axis A52 of second bent pipe 52. θ52 is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe fittings for drainage."

[0042] In FIG. 3, δ52 is the diameter [mm] of openings 521a, 522a of curved pipe portion 520. δ52 may be determined taking into consideration the target drainage capacity of piping system 1, etc. δ52 may be set in accordance with the standard JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage." δ52 may be set, for example, to satisfy the standard dimensions of the nominal diameter specified in JIS K 6739. According to JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage," when the nominal diameter is 75 mm, 100 mm, or 125 mm, the standard dimensions are 77.2 mm, 98.8 mm, and 125 mm.

[0043] As shown in FIG. 3, in a cross section of the second bent tube 52 taken along a plane including the tube axis A52, the bent tube portion 520 has an inner surface 520a on the inner circumferential side and an inner surface 520b on the outer circumferential side. The inner surface 520a has a corner 520c. The corner 520c is located in the middle portion of the inner surface 520a between the openings 521a and 522a. The corner 520c has an R-shape. In a cross section of the second bent tube 52 taken along a plane including the tube axis A52, the radius of curvature of the corner 520c is 0 mm or more and 54 mm or less, preferably 0 mm or more and 2 mm or less. The inner surface 520b does not have a corner like the corner 520c. The inner surface 520b is curved overall.

[0044] The sockets 521 and 522 are provided at both ends of the curved pipe section 520. The sockets 521 and 522 are provided to connect a pipe material to the second bent pipe 52. In this embodiment, the socket 521 is connected to the upstream end 3a of the standpipe 3, and the socket 522 is connected to the downstream end 4b of the horizontal pipe 4. The sockets 521 and 522 are cylindrical and surround the openings 521a and 522a of the curved pipe section 520, respectively. In FIG. 3, the sockets 521 and 522 have the same shape.

[0045] 3 shows D52, d52, and l52 as dimensions of the socket 521 of the second bent pipe 52. l52 is the length of the socket 521 (or the length of the socket 522) in a cross section taken along a plane including the pipe axis A52 of the curved pipe portion 520. D52 is the outer diameter [mm] of the socket 521 (or the socket 522). d52 is the inner diameter [mm] of the socket 521 (or the socket 522). The dimensions D52, d52, and l52 of the second bent pipe 52 may be set in accordance with, for example, the standard JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0046] In this embodiment, the first bent pipe 51 and the second bent pipe 52 have the same nominal diameter. The angle θ51 between the center lines C511 and C512 of the openings 511a and 512a at both ends of the first bent pipe 51 in a cross section taken along a plane including the pipe axis A51 of the first bent pipe 51 is equal to the angle θ52 between the center lines C521 and C522 of the openings 521a and 522a at both ends of the second bent pipe 52 in a cross section taken along a plane including the pipe axis A52 of the second bent pipe 52. Meanwhile, the radius of curvature R52 of the second bent pipe 52 is smaller than the radius of curvature R51 of the first bent pipe 51. Thus, the first bent pipe 51 and the second bent pipe 52 have different shapes.

[0047] In this embodiment, the first bent pipe 51 and the second bent pipe 52 are 90° elbows. In this case, the distance between the inlet 2b and the vertical pipe 3 in the horizontal direction can be increased while shortening the length of the horizontal pipe 4. In particular, the first bent pipe 51 is a 90° large bend elbow (so-called LL) defined in JIS K 6739. The second bent pipe 52 is a 90° elbow (so-called DL) defined in JIS K 6739. The 90° elbow defined in JIS K 6739 is smaller and has better designability than the 90° large bend elbow defined in JIS K 6739. Therefore, the designability of the exterior of the piping system 1 can be improved. The piping system 1 can be made less noticeable relative to the building 11. Pipe materials of a common standard can be used for the first bent pipe 51 and the second bent pipe 52, making it easier to install the piping system 1.

[0048] The piping system 1 includes a first bent pipe 51 and a second bent pipe 52. The direction of the flow path changes in each of the first bent pipe 51 and the second bent pipe 52. When the direction of the flow path changes, pressure loss due to separation can be a factor in a decrease in flow rate. In this embodiment, the radius of curvature R52 of the second bent pipe 52 is smaller than the radius of curvature R51 of the first bent pipe 51. Therefore, the pressure loss caused by the second bent pipe 52 tends to be larger than the pressure loss caused by the first bent pipe 51. In order to reduce the decrease in flow rate due to the pressure loss caused by the second bent pipe 52, a protrusion member 6 is provided.

[0049] 1, the protruding member 6 is located downstream of the second bent pipe 52. More specifically, the protruding member 6 is located on the inner circumferential side of the second bent pipe 52 within the vertical pipe 3, which is a straight pipe section downstream of the second bent pipe 52, and is used to partially reduce the flow path cross-sectional area of ​​the vertical pipe 3.

[0050] The protrusion member 6 is disposed in a straight pipe that is disposed downstream of a bent pipe that changes the direction of the flow path, and is used to partially reduce the flow path cross-sectional area of ​​the straight pipe. In the piping system 1, the straight pipe 32 of the vertical pipe 3 is disposed downstream of the second bent pipe 52 that changes the direction of the flow path. The protrusion member 6 is disposed so that at least a portion of the vertical pipe 3 is a straight pipe. In this embodiment, at least a portion of the vertical pipe 3 is a straight pipe 32.

[0051] The protruding members 6, together with the straight pipes 32 on which the protruding members 6 are arranged, constitute the piping member 10. In this embodiment, the piping member 10 is formed not of the entire vertical pipe 3 but of a part of the vertical pipe 3 (the straight pipe 32), and is therefore easy to transport.

[0052] Fig. 4 is a perspective view of a configuration example of the piping member 10, and Fig. 5 is an exploded perspective view of the piping member 10. As can be seen from Figs. 4 and 5, the piping member 10 includes a straight pipe 32 of the vertical pipe 3 and a protruding member 6.

[0053] As shown in FIG. 5, the protruding member 6 has a size that allows it to be placed inside the straight pipe 32 of the vertical pipe 3, that is, a length, a width, and a height (thickness).

[0054] In this embodiment, the protruding member 6 and the straight pipe 32 of the upright pipe 3 are separate bodies and can be made of different materials. Examples of materials for the protruding member 6 include resins such as polyvinyl chloride (PVC), hard polyvinyl chloride (hard PVC), PMMA, ABS, and ASA, and metals such as steel, aluminum, and stainless steel (metals that do not rust). In particular, the difference between the linear expansion coefficient of the material of the protruding member 6 and the linear expansion coefficient of the material of the portion to which the protruding member 6 is attached (in this embodiment, the straight pipe 32 of the upright pipe 3) is 4.7 × 10 -5 Less than or equal to 3.5 x 10 -5 This reduces the possibility of the protruding members 6 peeling off due to expansion and contraction caused by temperature differences (for example, temperature differences between summer and winter). As an example, the material of the protruding members 6 may be ASA, and the material of the standpipe 3 may be PVC.

[0055] The protruding member 6 has a first surface 60a and a second surface 60b. The first surface 60a is the surface facing the inner circumferential surface 30a of the standpipe 3. The second surface 60b is located on the opposite side of the first surface 60a and acts on (comes into contact with) the fluid flowing through the flow path. The first surface 60a and the second surface 60b are both surfaces of the protruding member 6 in a first direction. The first direction corresponds to the height of the protruding member 6.

[0056] The protruding member 6 has a first end 6a and a second end 6b in a second direction perpendicular to the first direction. The second direction corresponds to the width of the protruding member 6. The first end 6a and the second end 6b are both ends of the protruding member 6 in the width direction. The width direction of the protruding member 6 is perpendicular to the direction of the central axis C3 of the vertical pipe 3. The protruding member 6 has an outer shape that is mirror-symmetrical with respect to a plane perpendicular to the second direction.

[0057] The protrusion member 6 has a third end 6c and a fourth end 6d in a third direction perpendicular to the first and second directions. The third direction corresponds to the length of the protrusion member 6. The third end 6c and the fourth end 6d are both ends of the protrusion member 6 in the longitudinal direction. The longitudinal direction of the protrusion member 6 coincides with the direction of the central axis C3 of the standpipe 3. Therefore, the third direction is also the direction along the flow path of the standpipe 3. The third end 6c faces upstream, and the fourth end 6d faces downstream. In the protrusion member 6, a fluid flow occurs from the third end 6c to the fourth end 6d.

[0058] FIG. 6 is a cross-sectional view of the piping member 10. FIG. 7 is an enlarged view of P1 in FIG. 6. FIG. 8 is a cross-sectional view taken along line AA in FIG. 6. FIG. 9 is a cross-sectional view of a portion of the piping member 10 cut away. FIG. 10 is a plan view of the piping member 10. FIG. 11 is a bottom view of the piping member 10. FIG. 12 is a cross-sectional view taken along line XX in FIG. 8. FIG. 13 is a cross-sectional view taken along line XI-XI in FIG. 8. FIG. 14 is a cross-sectional view taken along line XII-XII in FIG. 8. FIG. 15 is a cross-sectional view taken along line XIII-XIII in FIG. 8.

[0059] FIG. 16 is a front view of the protruding member 6 (view of the protruding member 6 from the second surface 60b). FIG. 17 is a rear view of the protruding member 6 (view of the protruding member 6 from the first surface 60a). FIG. 18 is a side view of the protruding member 6 (view of the protruding member 6 from the first end 6a). FIG. 19 is another side view of the protruding member 6 (view of the protruding member 6 from the second end 6b).

[0060] As shown in FIG. 17, the first surface 60a has an outer periphery 601 and a central portion 602.

[0061] The outer circumferential portion 601 is used to fix the protruding member 6 to the standpipe 3. As shown in FIGS. 10 to 15 , the outer circumferential portion 601 is a portion of the first surface 60a that can come into contact with the inner circumferential surface 30a. The shape of the outer circumferential portion 601 is set so that it can come into contact with the inner circumferential surface 30a of the standpipe 3. For example, the outer circumferential portion 601 has a convex shape when viewed from the direction of the central axis C3 of the standpipe 3. The radius of curvature of the first surface 60a is set based on the radius of curvature of the inner circumferential surface 30a so that no gap is substantially generated between the first surface 60a and the inner circumferential surface 30a of the standpipe 3.

[0062] 17, the outer peripheral portion 601 extends along the entire periphery of the first surface 60a, and therefore surrounds the central portion 602 along the entire periphery.

[0063] The outer peripheral portion 601 has a groove 603. The groove 603 runs along at least a portion of the outer periphery of the first surface 60a. The groove 603 is used to apply an adhesive to fix the protruding member 6 to the standpipe 3. For example, the groove 603 can be used as a guide for applying the adhesive to the first surface 60a of the protruding member 6. This facilitates the assembly work of the piping member 10 or the installation work of the piping system 1, and reduces the likelihood of the protruding member 6 falling off or being left unattached.

[0064] In this embodiment, the groove 603 extends along the entire outer periphery of the first surface 60a. In Fig. 17, the groove 603 is made up of groove portions 603a, 603b, 603c, and 603d that extend along the sides of the first surface 60a on the first end 6a, second end 6b, third end 6c, and fourth end 6d sides, respectively.

[0065] In this embodiment, the groove 603 is located at a distance of 1 mm to 15 mm from the outer periphery of the first surface 60a. That is, the grooves 603a, 603b, 603c, and 603d are located at a distance of 1 mm to 15 mm from the sides of the first surface 60a on the first end 6a, second end 6b, third end 6c, and fourth end 6d sides.

[0066] In this embodiment, as shown in Fig. 24 described later, the cross-sectional shape of the groove 603 is triangular. The groove 603 has a first inner side surface 6031 and a second inner side surface 6032. The first inner side surface 6031 corresponds to a first direction (the height of the protruding member 6) in which the first surface 60a and the second surface 60b face each other. The second inner side surface 6032 corresponds to a second direction (the width of the protruding member 6) perpendicular to the first direction. This makes it easier to fix the protruding member 6 to the upright pipe 3 with an adhesive.

[0067] When manufacturing the protrusion member 6 by resin molding technology, it is possible to divide the mold for the protrusion member 6 in the second direction of the protrusion member 6. As described above, the groove 603 has the first inner surface 6031 and the second inner surface 6032, and therefore can be easily formed using a mold. This makes it possible to reduce the manufacturing cost of the protrusion member 6.

[0068] 24, the width W4 of the groove 603 is 0.5 mm or more and 3.0 mm or less. The depth d4 of the groove 603 is 0.2 mm or more and 2.0 mm or less. This makes it easier to fix the protruding member 6 to the straight pipe (vertical pipe 3) with an adhesive.

[0069] The central portion 602 is a portion of the first surface 60a that is recessed from the outer peripheral portion 601. As a result, as shown in FIGS. 12 to 15, even when the outer peripheral portion 601 comes into contact with the inner peripheral surface 30a, a gap is formed between at least a part of the central portion 602 and the inner peripheral surface 30a. The central portion 602 can function as a buffer for excess adhesive used to fix the protruding member 6 to the standpipe 3. This allows the central portion 602 to receive excess adhesive applied to the first surface 60a of the protruding member 6, reducing the possibility of the adhesive spilling out of the protruding member 6. This reduces the possibility of a decrease in flow rate due to such spillage of adhesive.

[0070] The central portion 602 is composed of a first region 602a on the first end 6a side of the protruding member 6 and a second region 602b on the second end 6b side of the protruding member 6. The first region 602a and the second region 602b are flat surfaces. The first region 602a is inclined so as to move away from the inner circumferential surface 30a as it moves toward the first end 6a. The second region 602b is inclined so as to move away from the inner circumferential surface 30a as it moves toward the second end 6b. The first region 602a and the second region 602b are rectangular, and the dimension in the second direction is shorter than the dimension in the third direction. The dimension in the second direction of each of the first region 602a and the second region 602b is 5% to 20% of the maximum dimension W1 of the first surface 60a in the second direction. Therefore, in this embodiment, the dimension W3 of the central portion 602 in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other is 10% to 40% of the maximum dimension W1 of the first surface 60a in the second direction. This further reduces the overflow of the adhesive that fixes the protruding member 6 to the straight pipe (vertical pipe 3).

[0071] In this embodiment, the central portion 602 is line-symmetrical about the center line of the protruding member 6 in the second direction (the width of the protruding member 6). Therefore, the first region 602a and the second region 602b are line-symmetrical about the center line of the protruding member 6 in the second direction (the width of the protruding member 6). This further reduces the overflow of adhesive that fixes the protruding member 6 to the straight pipe (upright pipe 3).

[0072] As described above, the outer peripheral portion 601 completely surrounds the central portion 602. That is, in the protruding member 6, the central portion 602 is completely surrounded by the outer peripheral portion 601. This further reduces the overflow of the adhesive that fixes the protruding member 6 to the standpipe 3.

[0073] When the protruding member 6 is manufactured by a resin molding technique, it is preferable to provide a gate in a portion of the mold corresponding to the central portion 602. Even if a gate residue occurs, the central portion 602 is a portion of the first surface 60a that is recessed from the outer peripheral portion 601. Therefore, it is possible to reduce the possibility that the gate residue will get in the way when fixing the protruding member 6 to the standpipe 3.

[0074] As shown in FIGS. 6, 8 to 11, and 16, the second surface 60b includes a main surface 61 and first and second side surfaces 62, 63. As shown in FIGS. 6, 8 to 9, the main surface 61 extends from the third end 6c toward the fourth end 6d. As shown in FIGS. 10 and 11, the main surface 61 faces the center of the standpipe 3 when viewed from the direction of the central axis C3 of the standpipe 3. The first side surface 62 and the second side surface 63 are located on both sides of the main surface 61 when viewed from the direction of the central axis C3 of the standpipe 3. The first side surface 62 is located on the first end 6a side of the main surface 61 (left side in FIG. 10), and the second side surface 63 is located on the second end 6b side of the main surface 61 (right side in FIG. 10).

[0075] In the protruding member 6, the main surface 61 and the first and second side surfaces 62, 63 of the second surface 60b can come into contact with the fluid flowing inside the standpipe 3. As shown in Fig. 8, the protruding member 6 causes a flow F1 along the main surface 61, a flow F2 along the first side surface 62, and a flow F3 along the second side surface 63. Because the main surface 61 and the first and second side surfaces 62, 63 can come into contact with the fluid, it is preferable that the surface roughness of the main surface 61 and the first and second side surfaces 62, 63 be small, as this can be expected to improve the flow rate.

[0076] The protrusion member 6 has a first separation wall 64 for promoting separation of the flow F1 and the flow F2. The presence of the first separation wall 64 can make it easier for the flow F2 to separate from the flow F1. The first separation wall 64 is located between the main surface 61 and the first side surface 62. In this embodiment, the first separation wall 64 is the boundary between the main surface 61 and the first side surface 62. In other words, the boundary between the main surface 61 and the first side surface 62 forms a wall between a flow path having the main surface 61 as its bottom surface and a flow path having the first side surface 62 as its bottom surface. The first separation wall 64 can be formed by having both the main surface 61 and the first side surface 62 have a concave shape.

[0077] The protrusion member 6 has a second separation wall 65 to promote separation of the flow F1 and the flow F3. The presence of the second separation wall 65 can make it easier for the flow F3 to separate from the flow F1. The second separation wall 65 is located between the main surface 61 and the second side surface 63. In this embodiment, the second separation wall 65 is the boundary between the main surface 61 and the second side surface 63. In other words, the boundary between the main surface 61 and the second side surface 63 forms a wall between a flow path having the main surface 61 as its bottom surface and a flow path having the second side surface 63 as its bottom surface. The second separation wall 65 can be formed by making both the main surface 61 and the second side surface 63 concave.

[0078] As shown in Figures 6, 9, 10, and 16 to 19, the protruding member 6 has an end face 66 at the third end 6c. The end face 66 intersects with the central axis C3 of the standpipe 3. In this embodiment, the end face 66 is perpendicular to the central axis C3 of the standpipe 3. The third end 6c of the protruding member 6 has a small thickness. In contrast, because the protruding member 6 has the end face 66, the possibility of damage to the third end 6c of the protruding member 6 can be reduced.

[0079] As shown in FIGS. 6, 13, and 17 to 19, the protrusion member 6 has a protrusion 67. The protrusion 67 is used to join or position the standpipe 3 and the protrusion member 6. The protrusion 67 is arranged on the first surface 60a. The protrusion 67 is shaped to fit into a hole 3c on the inner circumferential surface of the standpipe 3. In this embodiment, the standpipe 3 has a pair of holes 3c at the upstream end 3a. The holes 3c are formed as through holes. The protrusion member 6 has a pair of protrusions 67 that fit into the pair of holes 3c, respectively. The protrusion member 6 is positioned relative to the standpipe 3 by fitting the pair of protrusions 67 into the pair of holes 3c, respectively.

[0080] As shown in FIGS. 6, 7, and 16 to 19, the protrusion member 6 has an end face 68 at the fourth end 6d. The end face 68 intersects with the central axis C3 of the standpipe 3. In this embodiment, the end face 68 is perpendicular to the central axis C3 of the standpipe 3. The end face 68 has an opening 69. The opening 69 is connected to the internal space of the protrusion member 6.

[0081] Fig. 20 is an exploded perspective view of the protrusion member 6, and Fig. 21 is another exploded perspective view of the protrusion member 6. As can be seen from Figs. 20 and 21, the protrusion member 6 is composed of a first portion 610 and a second portion 620, which are separate bodies. The first portion 610 is a portion of the protrusion member 6 on the side of the first end 6a in the second direction perpendicular to the first direction, where the first surface 60a and the second surface 60b face each other. The second portion 620 is a portion of the protrusion member 6 on the side of the second end 6b in the second direction.

[0082] 22 is a side view of the first portion 610. The first portion 610 occupies half of the first end 6a side of the protruding member 6. The first portion 610 has a first outer portion 611, a first boss 612, first ribs 613 and 614, a receiving portion 615, and a recess 616.

[0083] The first outer portion 611 defines the outer shape of the first end 6a of the protruding member 6. The first outer portion 611 has a hollow shape with an opening 611b on a third surface 611a facing the second part 620. Because the first outer portion 611 is hollow, the amount of material required can be reduced compared to a solid first outer portion 611. The first outer portion 611 includes the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end face 66, the protrusion 67, the end face 68, and first portions 60a1, 60b1, 6c1, 6d1, 66a, 67a, 68a, and 69a on the first end 6a side of the opening 69. The first portion 60a1 of the first surface 60a includes a first portion 601a of the outer periphery 601 and a first region 602a of the central portion 602. The first portion 601a of the outer circumferential portion 601 includes, as a first portion of the groove 603, a groove portion 603a, a first portion 603c1 of the groove portion 603c, and a first portion 603d1 of the groove portion 603d.

[0084] The first boss 612 extends from the inner surface of the first outer portion 611 toward the second portion 620 along the second direction. The first boss 612 is cylindrical. The first boss 612 has a hole 612a into which a second boss 622, which will be described later, fits. In this embodiment, the first portion 610 has two first bosses 612. The two first bosses 612 are aligned along the third direction.

[0085] The first ribs 613, 614 extend within the first outer portion 611 in a direction perpendicular to the second direction and connect two points on the inner surface of the first outer portion 611. The first rib 613 extends along the third direction. The first rib 614 extends along the first direction. In this embodiment, the first portion 610 has two first ribs 614. The two first ribs 614 are aligned along the third direction. Although the first outer portion 611 is hollow, the presence of the first ribs 613, 614 reduces a decrease in strength of the first portion 610.

[0086] Receiving portion 615 is formed around opening 611b of third surface 611a. Receiving portion 615 has a shape that fits a peripheral wall portion 625, which will be described later. In this embodiment, receiving portion 615 is a step portion formed around the entire periphery of opening 621b.

[0087] The recess 616 is used to connect the first part 610 and the second part 620. The recess 616 is a portion of the first part 610 into which a protrusion 626 (described later) of the second part 620 fits. The recess 616 is formed on the first surface 60a side of the first part 610. In this embodiment, the recess 616 is an opening located on the first surface 60a. The recess 616 is rectangular. The recess 616 is located in a position recessed from a portion of the first surface 60a that can contact the inner circumferential surface 30a. This reduces the possibility that the recess 616 will get in the way when fixing the protrusion member 6 to the standpipe 3. More specifically, as shown in FIGS. 17 and 18 , the recess 616 is located in the central part 602, not the outer circumferential part 601, of the first surface 60a. In this embodiment, the first part 610 has two recesses 616. The two recesses 616 are located on the third end 6c side and the fourth end 6d side in the central portion 602 of the first surface 60a. In particular, the recess 616 on the third end 6c side is located between the two protrusions 67 in the third direction.

[0088] 23 is a side view of the second portion 620. The second portion 620 occupies half of the second end 6b side of the protruding member 6. The second portion 620 has a second outer portion 621, a second boss 622, second ribs 623 and 624, a peripheral wall portion 625, and a protrusion 626.

[0089] The second outer portion 621 defines the outer shape of the second end 6b of the protruding member 6. The second outer portion 621 has a hollow shape with an opening 621b on a fourth surface 621a facing the first part 610. Because the second outer portion 621 is hollow, the amount of material required can be reduced compared to a solid second outer portion 621. The second outer portion 621 includes the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end face 66, the protrusion 67, the end face 68, and second portions 60a2, 60b2, 6c2, 6d2, 66b, 67b, 68b, and 69b on the second end 6b side of the opening 69. The second portion 60a2 of the first surface 60a includes the second portion 601b of the outer periphery 601 and the second region 602b of the central portion 602. The second portion 601b of the outer circumferential portion 601 includes, as the second portion of the groove 603, the groove portion 603b, the second portion 603c2 of the groove portion 603c, and the second portion 603d2 of the groove portion 603d.

[0090] The second boss 622 extends from the inner surface of the second outer portion 621 toward the first part 610 along the second direction. The second boss 622 is coupled to the first boss 612. The second boss 622 is cylindrical. The second boss 622 is sized to fit into the hole 612a of the first boss 612. The second boss 622 is coupled to the first boss 612 by fitting into the hole 612a of the first boss 612. In this embodiment, the second part 620 has two second bosses 622. The two second bosses 622 are aligned along the third direction.

[0091] The second ribs 623, 624 extend in a direction perpendicular to the second direction within the second outer shell 621 and connect two points on the inner surface of the second outer shell 621. The second rib 623 extends along the third direction. The second rib 624 extends along the first direction. In this embodiment, the second part 620 has two second ribs 624. The two second ribs 624 are aligned along the third direction. Although the second outer shell 621 is hollow, the presence of the second ribs 623, 624 reduces a decrease in strength of the second part 620.

[0092] Peripheral wall portion 625 protrudes from the periphery of opening 621b in fourth surface 621a toward first end 6a and surrounds opening 621b in fourth surface 621a. In this embodiment, peripheral wall portion 625 has a shape that surrounds opening 621b all around. Peripheral wall portion 625 has a shape that fits inside receiving portion 615.

[0093] The protrusion 626 is used to connect the first portion 610 and the second portion 620. The protrusion 626 is adapted to fit into the recess 616. By fitting the protrusion 626 into the recess 616 in this manner, separation between the first portion 610 and the second portion 620 is reduced. The protrusion 626 extends toward the first end 6a. The protrusion 626 is formed on the first surface 60a side of the second portion 620. In this embodiment, the protrusion 626 includes a long plate-shaped spring portion 626a and a claw portion 626b at the tip of the spring portion 626a. The protrusion 626 is fixed to the recess 616 by fitting the claw portion 626b into the recess 616. The protrusion 626 is located in a recessed position on the first surface 60a relative to a portion that can contact the inner circumferential surface 30a. This reduces the possibility that the protrusion 626 will get in the way when fixing the protruding member 6 to the upright pipe 3. 17 and 19, the protrusion 626 is located in the central portion 602 of the first surface 60a, not in the outer periphery 601. In this embodiment, the second portion 620 includes two protrusions 626. The two protrusions 626 are located on the third end 6c side and the fourth end 6d side in the central portion 602 of the first surface 60a. In particular, the protrusion 626 on the third end 6c side is located between the two protrusions 67 in the third direction.

[0094] The protrusion member 6 is assembled by joining the first part 610 and the second part 620 together so that the third surface 611a of the first part 610 and the fourth surface 621a of the second part 620 face each other. Fig. 24 is a cross-sectional view of the protrusion member 6. As can be seen from Figs. 18 and 24, when the protrusion member 6 is assembled, the protrusion 626 fits into the recess 616, the second boss 622 is joined to the first boss 612, and the peripheral wall portion 625 fits into the receiving portion 615.

[0095] In the protruding member 6, the tip of the second boss 622 is located between the tip of the protrusion 626 and the fourth surface 621a in the second direction. Therefore, when the first part 610 and the second part 620 are joined together, the protrusion 626 comes into contact with the first part 610 rather than the second boss 622 and fits into the recess 616. This allows the second boss 622 to be positioned relative to the first boss 612. This makes it easier to join the first part 610 and the second part 620. In the second direction, the tip of the second boss 622 is located between the tip of the protrusion 626 and the tip of the peripheral wall part 625. Therefore, after the second boss 622 is joined to the first boss 612, the peripheral wall part 625 fits into the receiving part 615. This makes it easier to position the peripheral wall part 625 relative to the receiving part 615. This makes it easier to join the first part 610 and the second part 620.

[0096] By joining the first portion 610 and the second portion 620, the first portions 60a1, 60b1, 6c1, 6d1, 66a, 67a, 68a, 69a of the first portion 610 and the second portions 60a2, 60b2, 6c2, 6d2, 66b, 67b, 68b, 69b of the second portion 620 are combined to form the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end surface 66, the protrusion 67, the end surface 68, and the opening 69.

[0097] In this way, in the protrusion member 6, the first portion 610 on the side of the first end 6a in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other, and the second portion 620 on the side of the second end 6b in the second direction, are separate bodies. Therefore, the first portion 610 and the second portion 620 can be manufactured separately using a molding technique using a mold, such as injection molding. Therefore, it is possible to simplify the configuration of the mold required to manufacture the protrusion member 6 compared to manufacturing the protrusion member 6 as a single part using a molding technique using a mold. This reduces the cost of the mold itself, and as a result, makes it possible to reduce the manufacturing cost of the protrusion member 6.

[0098] Because the first outer portion 611 and the second outer portion 621 are hollow, the amount of material required can be reduced compared to when they are solid. Unlike when the protruding member 6 is manufactured as a single part by molding using a mold, when the protruding member 6 is hollow, openings can be provided not in the first surface 60a but in the third surface 611a of the first outer portion 611 and the fourth surface 621a of the second outer portion 621. This increases the area of ​​the first surface 60a that can be used for bonding the protruding member 6.

[0099] In the protrusion member 6, the interior of the first outer portion 611 and the interior of the second outer portion 621 form the internal space of the protrusion member 6. Fluid may enter the internal space of the protrusion member 6 through the gap between the first portion 610 and the second portion 620. If the fluid is water, it may freeze due to a drop in temperature. In this case, the water expands as it freezes, which may cause damage to the protrusion member 6. In this embodiment, the peripheral wall portion 625 of the second portion 620 fits inside the receiving portion 615 of the first portion 610, thereby reducing the possibility of fluid entering through the gap between the first portion 610 and the second portion 620. Furthermore, in the protrusion member 6, the opening 69 on the end surface 68 connects to the interior of the first outer portion 611 and the interior of the second outer portion 621. Therefore, water that enters the internal space of the protrusion member 6 can be drained through the opening 69. This reduces the possibility of damage to the protrusion member 6 caused by fluid such as water accumulating in the internal space of the protrusion member 6. That is, the opening 69 acts as a drain hole.

[0100] FIG. 25 is an explanatory diagram of the attachment of the protruding member 6. The protruding member 6 is disposed on the inner circumferential surface 30a of the straight pipe 32 of the vertical pipe 3. An adhesive is applied to the first surface 60a, and the protruding member 6 is attached to the straight pipe 32 by the adhesive. As described above, the outer peripheral portion 601 of the first surface 60a has a groove 603. The groove 603 can be used as a guide for applying adhesive to the first surface 60a of the protruding member 6. This facilitates the attachment of the protruding member 6 and reduces the risk of the protruding member 6 falling off or being left unattached. The central portion 602 of the first surface 60a is recessed relative to the outer peripheral portion 601, so it can function as a buffer for excess adhesive. This allows the central portion 602 to receive excess adhesive applied to the first surface 60a of the protruding member 6, reducing the possibility of the adhesive spilling out of the protruding member 6. In this embodiment, the protruding member 6 is positioned relative to the straight pipe 32 by fitting a pair of protrusions 67 into a pair of holes 3c, respectively. By fitting the pair of protrusions 67 into the pair of holes 3c, respectively, the possibility of the protrusion member 6 falling off from the straight pipe 32 can be reduced compared to when adhesive alone is used. Here, the protrusion 67 is composed of a first portion 67a of the first part 610 and a second portion 67b of the second part 620. By inserting the protrusion 67 into the holes 3c, the possibility of the protrusion 67 separating into the first portion 67a and the second portion 67b is reduced. This makes it easier to maintain the bonded state between the first part 610 and the second part 620.

[0101] 26 is an explanatory diagram of the installation of the piping member 10. The piping member 10 is arranged on the downstream side of the second bent pipe 52 with the upstream end 3a inserted into the socket 521 of the second bent pipe 52. When the piping member 10 is connected to the socket 521 of the second bent pipe 52, the pair of holes 3c of the standpipe 3 are hidden by the socket 521.

[0102] By disposing the protruding member 6, the flow path cross-sectional area of ​​the piping member 10 is not constant, and there is a reduced portion where the flow path cross-sectional area of ​​the piping member 10 is smaller than the cross-sectional area of ​​the straight pipe 32. The protruding member 6 is located closer to the upstream end 3a of the standpipe 3 than to the downstream end 3b of the standpipe 3. In this embodiment, the protruding member 6 is located at the upstream end 3a of the standpipe 3. In other words, the protruding member 6 reduces the flow path at the upstream end 3a of the standpipe 3 that connects to the second bent pipe 52.

[0103] Next, the function of the protruding member 6 in the piping member 10 will be described. The protruding member 6 is disposed inside the vertical pipe 3, which is disposed downstream of the second bent pipe 52. The second bent pipe 52 directs water that has flowed in from the horizontal pipe 4 into the vertical pipe 3. If the direction of water flow changes significantly in the second bent pipe 52, pressure loss due to separation can be one factor in reducing the flow rate.

[0104] FIG. 27 is a diagram illustrating a simulation of pressure distribution in a comparative piping member 100. The comparative piping member 100 differs from the piping member 10 in that it does not have the protruding member 6. In FIG. 27, darker colors indicate lower pressure. In particular, the pressure loss is large at the portion indicated by R in FIG. 27. The presence of such a portion can be a major factor in reducing the flow rate. The pressure loss at the portion indicated by R in FIG. 27 is believed to be due to peeling. This peeling occurs when water separates from the first wall surface 30b of the piping member 100 downstream of the inner wall surface 50a of the second bent pipe 52. That is, as indicated by arrow F in FIG. 27, water flowing in from the upstream side initially flows along the pipe wall 200. However, after reaching the inner wall surface 50a of the second bent pipe 52, the water may separate from the first wall surface 30b of the piping member 100. This type of peeling is particularly noticeable when the water flow velocity is high. The faster the flow velocity, the wider the area where pressure loss occurs.

[0105] In this embodiment, the piping member 10 includes a protruding member 6. The presence of the protruding member 6 is expected to (1) allow water to flow more easily along the pipe wall than without the protruding member 6, and (2) reduce the number of areas where pressure loss may occur. Therefore, the protruding member 6 reduces pressure loss due to separation downstream from the second bent pipe 52, thereby improving the flow rate. Unlike the technology described in Patent Document 1, the piping member 10 does not require a large radius of curvature on the inner circumferential surface of the second bent pipe 52, simply by including the protruding member 6, thereby enabling miniaturization. Therefore, the protruding member 6 can improve the flow rate while enabling miniaturization. The protruding member 6 is located inside the upright pipe 3, making it less noticeable when viewed from the perspective of the piping system 1 as a whole. This is expected to improve the aesthetic appearance of the piping system 1 as a whole.

[0106] Furthermore, the protruding member 6 has a protruding portion 6i in a region between the apex 6e and the fourth end 6d. Compared to when the protruding portion 6i is not present, the path of the flow (mainly the flow F1) along the protruding member 6 can be extended. This promotes the Coanda effect of the protruding member 6, and the flow rate can be improved. Furthermore, the presence of the protruding portion 6i makes it possible to improve the strength of the region of the protruding member 6 between the apex 6e and the fourth end 6d.

[0107] The shape of the protruding member 6 will now be described in more detail.

[0108] As can be seen from FIGS. 6, 8, and 10 to 15, the shape (cross-sectional shape) of the protruding member 6 seen from the direction of the central axis C3 of the standpipe 3 changes along the direction of the central axis C3 of the standpipe 3.

[0109] 6, the height of the protruding member 6 varies along the direction of the central axis C3 of the standpipe 3. In this embodiment, the protruding member 6 has a top portion 6e and a protruding portion 6i.

[0110] The top 6e is located between the third end 6c and the fourth end 6d. The top 6e is the highest part of the protruding member 6. The top 6e makes the flow path cross-sectional area of ​​the standpipe 3 the smallest.

[0111] The protruding portion 6i extends from a portion between the top portion 6e and the fourth end 6d toward the center of the standpipe 3 when viewed from the direction of the central axis C3 of the standpipe 3. In this embodiment, the protruding portion 6i is located at the fourth end 6d. When viewed from the direction of the central axis C3 of the standpipe 3, the protruding portion 6i does not protrude beyond the top portion 6e.

[0112] The height of the protruding member 6 increases monotonically from the third end 6c toward the apex 6e. The height of the protruding member 6 decreases monotonically from the apex 6e toward the fourth end 6d. In this embodiment, the height of the protruding member 6 decreases from the apex 6e to the protruding portion 6i, and then increases or decreases according to the shape of the protruding portion 6i.

[0113] As shown in Fig. 6, in a cross section perpendicular to the width direction of the protruding member 6, the main surface 61 includes a curved shape at the apex 6e that protrudes toward the second wall surface 30c. This improves the flow rate. From another perspective, the main surface 61 only needs to have a shape that protrudes toward the second wall surface 30c so as to produce the Coanda effect on the downstream side of the second bent pipe 52. In other words, the main surface 61 only needs to have a shape that produces the Coanda effect on the downstream side of the second bent pipe 52. This improves the flow rate while enabling miniaturization.

[0114] See Figures 6 and 7. If the dimension of the protrusion 6i as viewed in the direction of the central axis C3 of the riser pipe 3 is a and the inner diameter of the riser pipe 3 is d, then 0.01d≦a≦0.05d holds. This allows for an improvement in the flow rate. If the dimension of the protrusion 6i in the direction of the central axis C3 of the riser pipe 3 is b and the inner diameter of the riser pipe 3 is d, then 0.01d≦b≦0.05d holds. This allows for an improvement in the flow rate.

[0115] In Figure 7, the shape of the protruding member 6 when the height of the protruding member 6 decreases monotonically from the apex 6e toward the fourth end 6d is shown by a two-dot chain line. The dimensions a and b of the protruding portion 6i can be set based on the shape shown by the two-dot chain line. The dimension a may be the maximum amount of protrusion from the shape shown by the two-dot chain line. The dimension b may be the distance between the upstream and downstream boundaries of the shape shown by the two-dot chain line and the protruding portion 6i.

[0116] In a cross section perpendicular to the width direction of the protruding member 6, the protruding portion 6i includes a curved shape that protrudes toward the second wall surface 30c. This improves the flow rate. From another perspective, the protruding portion 6i may have a shape that protrudes toward the second wall surface 30c so as to generate the Coanda effect. In other words, the protruding portion 6i may have a shape that generates the Coanda effect downstream of the apex 6e. This improves the flow rate. Here, if the radius of curvature of the upstream corner 6j1 and the downstream corner 6j2 of the protruding portion 6i as viewed from the width direction of the protruding member 6 is r, then r≦a or r≦b. Preferably, r≦a and r≦b. The upstream corner 6j1 and the downstream corner 6j2 may have different radii of curvature.

[0117] 8, the protrusion 6i is located at the fourth end 6d and is formed across the entire width of the fourth end 6d.

[0118] 11, at least a part of the protruding portion 6i has a convex shape when viewed from the direction of the central axis C3 of the upright pipe 3. This can contribute to a reduction in pressure loss in the protruding member 6.

[0119] Referring to FIG. 6, the protrusion member 6 induces a flow F1 along the protrusion member 6, mainly along the main surface 61. The protrusion member 6 has a protrusion 6i at a portion between the apex 6e and the fourth end 6d. Referring to FIG. 7, a flow F4 can occur downstream of the flow F1 along the protrusion 6i. As a result, the path of the flow F1 can be extended compared to when the protrusion 6i is not present. This promotes the Coanda effect by the protrusion member 6, and can improve the flow rate. Furthermore, the protrusion 6i itself generates the Coanda effect, making it easier to induce the flow F4.

[0120] As can be seen from FIGS. 10 to 15, the shape of the main surface 61 seen from the direction of the central axis C3 of the standpipe 3 changes along the direction of the central axis C3 of the standpipe 3.

[0121] 10 and 12, at least a portion of the main surface 61 has a concave shape when viewed from the direction of the central axis C3 of the standpipe 3. At least a portion of the main surface 61 is a portion of the main surface 61 on the third end 6c side. In other words, the main surface 61 has a concave shape at the third end 6c. When viewed from the direction of the central axis C3 of the standpipe 3, the radius of curvature of at least a portion of the main surface 61 (the third end 6c) is equal to or smaller than the radius of curvature of the inner circumferential surface 30a of the standpipe 3. This reduces pressure loss in the protruding member 6.

[0122] As shown in FIGS. 10 to 14, the main surface 61 has a concave shape at the third end 6c but a convex shape at the fourth end 6d. That is, the shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 changes from a concave shape to a convex shape from the third end 6c to the fourth end 6d. This facilitates flow along the main surface 61 of the protruding member 6. In this embodiment, as shown in FIG. 14, the shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 is convex at the top 6e. The shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 is convex in the range from the top 6e to the fourth end 6d. In this embodiment, the protruding member 6 has a flat portion 6f between the third end 6c and the top 6e. As shown in FIG. 13, at the flat portion 6f, the main surface 61 has a planar shape as viewed from the direction of the central axis C3 of the standpipe 3.

[0123] In the concave area of ​​the main surface 61, the center of the concave shape of the main surface 61, i.e., the lowest part of the concave shape, is located closer to the center than the ends in the width direction of the protrusion member 6. In the convex area of ​​the main surface 61, the center of the convex shape of the main surface 61, i.e., the highest part of the convex shape, is located closer to the center than the ends in the width direction of the protrusion member 6. In this embodiment, the center of the convex shape of the main surface 61 coincides with the center of the protrusion member 6 in the width direction.

[0124] As can be seen from FIGS. 10 to 15, the shapes of the first side surface 62 and the second side surface 63 when viewed from the direction of the central axis C3 of the standpipe 3 change along the direction of the central axis C3 of the standpipe 3.

[0125] 10 and 12, when viewed from the direction of the central axis C3 of the vertical pipe 3, at least a portion of the first side surface 62 has a concave shape. At least a portion of the first side surface 62 is a portion of the first side surface 62 on the third end 6c side. In other words, the first side surface 62 has a concave shape at the third end 6c. This reduces pressure loss in the protruding member 6.

[0126] 10 and 12, at least a portion of the second side surface 63 has a concave shape when viewed from the direction of the central axis C3 of the vertical pipe 3. At least a portion of the second side surface 63 is a portion of the second side surface 63 on the third end 6c side. In other words, the second side surface 63 has a concave shape at the third end 6c. This reduces pressure loss in the protruding member 6.

[0127] The shape of the first side surface 62 when viewed from the direction of the central axis C3 of the upright pipe 3 remains concave from the third end 6c to the fourth end 6d. As can be seen from Figures 14 and 15, the depth of the concave shape of the first side surface 62 becomes shallower from the apex 6e to the fourth end 6d. This allows the flow F2 along the first side surface 62 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0128] The shape of the second side surface 63 when viewed from the direction of the central axis C3 of the standpipe 3 remains concave from the third end 6c to the fourth end 6d. As can be seen from Figures 14 and 15, the depth of the concave shape of the second side surface 63 becomes shallower from the top 6e to the fourth end 6d. This allows the flow F3 along the second side surface 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0129] 8, the first side surface 62 and the second side surface 63 of the protrusion member 6 are symmetrical with respect to the center line of the protrusion member 6 that is along the central axis C3 of the standpipe 3. This can improve the flow rate.

[0130] As shown in FIG. 8 , the width of the protruding member 6 varies along the central axis C3 of the upright pipe 3. The width of the protruding member 6 refers to the width of the portion of the protruding member 6 closest to the inner circumferential surface 30a of the upright pipe 3. In this embodiment, the width of the protruding member 6 corresponds to the width of the first surface 60a of the protruding member 6. The protruding member 6 has a first variation portion 6g, where the direction of the width variation changes, and a second variation portion 6h, between the third end 6c and the fourth end 6d. The first variation portion 6g is located between the third end 6c and the apex 6e, more specifically, the flat portion 6f. The second variation portion 6h is located between the apex 6e and the fourth end 6d. The width of the protruding member 6 increases monotonically from the third end 6c to the first variation portion 6g. The width of the protruding member 6 decreases monotonically from the first variation portion 6g to the second variation portion 6h. The width of the protruding member 6 increases monotonically from the second variation portion 6h to the fourth end 6d. The width of the protruding member 6 is largest at the first transition portion 6g. The width of the protruding member 6 at the first transition portion 6g is the maximum dimension of the first surface in a second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b of the protruding member 6 face each other. The width of the protruding member 6 at the first transition portion 6g is, for example, 50 mm or more and 100 mm or less. For example, the width of the protruding member 6 at the first transition portion 6g is 60 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 75 mm, 78 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 100 mm, and 96 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 125 mm. This facilitates the process of fixing the protruding member to the straight pipe with adhesive. As shown in FIG. 10, the maximum width of the protruding member 6 (the width at the first transition portion 6g) as viewed from the direction of the center axis C3 of the standpipe 3 is designated W1. If the inner diameter of the riser pipe 3 is d, then 0.38d≦W1≦1.00d, preferably 0.50d≦W1≦0.90d. If the maximum value of the distance between the first separation wall 64 and the second separation wall 65 as viewed from the direction of the central axis C3 of the riser pipe 3 is W2, then 0.3d≦W2≦0.7d, i.e. W2≦W1.

[0131] The width of the main surface 61 narrows from the third end 6c to the fourth end 6d, at least from the third end 6c to the apex 6e. This configuration allows the flows F2 and F3 along the first side surface 62 and the second side surface 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protruding member 6. In this embodiment, the width of the main surface 61 decreases monotonically from the third end 6c to the fourth end 6d.

[0132] The first side surface 62 includes a portion whose width increases from the third end 6c toward the fourth end 6d. More specifically, the portion of the first side surface 62 on the third end 6c side increases in width from the third end 6c toward the fourth end 6d. This configuration can reduce pressure loss. In this embodiment, the portion of the first side surface 62 on the third end 6c side includes the portion of the first side surface 62 from the third end 6c to the flat portion 6f.

[0133] The second side surface 63 includes a portion whose width increases from the third end 6c toward the fourth end 6d. More specifically, the portion of the second side surface 63 on the third end 6c side increases in width from the third end 6c toward the fourth end 6d. This configuration can reduce pressure loss. In this embodiment, the portion of the second side surface 63 on the third end 6c side includes the portion of the second side surface 63 from the third end 6c to the flat portion 6f.

[0134] The first separation wall 64 and the second separation wall 65 are formed on a part of, but not the entire, protrusion member 6 in the direction of the central axis C3 of the standpipe 3. More specifically, the first separation wall 64 and the second separation wall 65 exist in a predetermined range from the third end 6c along the direction of the central axis C3 of the standpipe 3. The predetermined range is the range from the third end 6c to the flat portion 6f.

[0135] The distance between the first separation wall 64 and the second separation wall 65 becomes shorter from the third end 6c toward the fourth end 6d. This configuration separates the flows F2 and F3 along the first and second side faces 62 and 63 from the flow F1 along the main surface 61 on the upstream side of the protrusion member 6, and allows the flows F2 and F3 along the first and second side faces 62 and 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0136] The heights of the first separation wall 64 and the second separation wall 65 decrease from the third end 6c toward the fourth end 6d. This configuration separates the flows F2 and F3 along the first and second side faces 62 and 63 from the flow F1 along the main surface 61 on the upstream side of the protrusion member 6, and allows the flows F2 and F3 along the first and second side faces 62 and 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0137] See Figure 14. When viewed from the direction of the central axis C3 of the vertical pipe 3, the distance between the top 6e of the protruding member 6 and the second wall surface 30c is defined as D1. It is preferable that the protruding member 6 has a relationship of 0.60d≦D1≦0.95d. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0138] The height of the top 6e of the protruding member 6 as viewed from the direction of the central axis C3 of the vertical pipe 3 is defined as H1. H1=d-D1. It is preferable that the protruding member 6 has a height of 0.05d≦H1≦0.40d. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0139] The maximum flow cross-sectional area of ​​the vertical pipe 3 is defined as A. The maximum flow cross-sectional area A can be calculated from the inner diameter d of the vertical pipe 3. In other words, A = π(d / 2) 2The cross-sectional area of ​​the protruding member at the top 6e is defined as A1. In the protruding member 6, it is preferable that A1 / A≦0.5, and more preferably that A1 / A≦0.4. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization. The minimum value of the flow path cross-sectional area in the piping member 10 is defined as A2. A2 is the flow path cross-sectional area at the top 6e of the protruding member 6. A2 is A−A1. In the protruding member 6, it is preferable that 0.5≦A2 / A<1, and more preferably that 0.6≦A2 / A<1. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0140] As described above, the protrusion member 6 has an end surface 68 at the fourth end 6d. FIG. 28 is a comparison diagram between the protrusion member 6 according to this embodiment and a protrusion member 600 that does not have the end surface 68. The protrusion member 600 is identical to the protrusion member 6 except that it does not have the end surface 68. When viewed in the width direction of the protrusion member 600, the fourth end 6d of the protrusion member 600 has a tapered shape. At the fourth end 6d, the height of the protrusion member 600 becomes zero. From FIG. 28, it can be seen that the protrusion member 6 has a shape obtained by cutting the portion of the protrusion member 600 on the fourth end 6d side in a direction perpendicular to the central axis C3 of the standpipe 3. The height of the protrusion member 6 decreases monotonically from the apex 6e to the protruding portion 6i. If the length of the protrusion member 6 were extended downstream, the protrusion member 6 would have a hypothetical portion where the height of the protrusion member 6 becomes zero. This portion where the height of the protrusion member 6 becomes zero may correspond to the fourth end 6d of the protrusion member 600.

[0141] The dimension of the protrusion member 6 in the direction of the central axis C3 of the vertical pipe 3 can be made smaller than that of the protrusion member 600. In particular, the protrusion member 6 has a shape in which the portion of the protrusion member 600 on the side of the fourth end 6d that protrudes from the straight pipe 32 to the outside is cut off. In other words, when the protrusion member 600 is placed in the straight pipe 32, the portion of the protrusion member 600 on the side of the fourth end 6d protrudes outward from the second end of the straight pipe 32. The fourth end 6d of the protrusion member 600 is thin and therefore easily damaged. Therefore, when the protrusion member 600 is placed in the straight pipe 32, there is a possibility that the protrusion member 600 will be damaged during transportation, etc.

[0142] In contrast, the protruding member 6 has an end face 68, and the position of the end face 68 is set so that the protruding member 6 is contained within the straight pipe 32 in the direction of the central axis C3 of the vertical pipe 3, as shown in FIG. 6. In this embodiment, the length of the protruding member 6 (the distance between the third end 6c and the fourth end 6d) is shorter than the length of the straight pipe 32. That is, in the piping member 10, the entire protruding member 6 is located within the straight pipe 32. This allows the protruding member 6 to be protected by the straight pipe 32, compared to when the protruding member 6 is partially protruding from the straight pipe 32. This reduces the possibility of damage to the protruding member 6, etc.

[0143] The protrusion member 6 has the advantage that the dimension in the direction of the central axis C3 of the upright pipe 3 can be made smaller than that of the protrusion member 600, and breakage can be prevented. Such a change in shape between the protrusion member 6 and the protrusion member 600 can also cause a change in pressure loss. Therefore, the change in pressure loss caused by the difference in shape between the protrusion member 6 and the protrusion member 600 was evaluated. Figure 29 is a graph showing the change in pressure loss due to the protrusion member 6 compared to the protrusion member 600.

[0144] 29, the vertical axis represents pressure loss in the piping member. The horizontal axis represents length percentage [%]. The length percentage [%] is the percentage of the distance from the apex 6e to the fourth end 6d of the protrusion member 6 relative to the distance from the apex 6e to the fourth end 6d of the protrusion member 600.

[0145] In Figures 6 and 28, the distance between the third end 6c and the fourth end 6d of the protruding member 6 in the direction of the central axis C3 of the standpipe 3 is represented by L'. The distance between the top 6e and the fourth end 6d of the protruding member 6 in the direction of the central axis C3 of the standpipe 3 is represented by L2'. In Figure 28, the distance between the third end 6c and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by L. The distance between the top 6e and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by L2. The distance between the fourth end 6d of the protruding member 6 and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by ΔL. L2 = L2' + ΔL, and L = L' + ΔL. The length percentage [%] is calculated by L2' / L2 x 100.

[0146] In FIG. 29, a length ratio of 100% indicates that the shape of the protrusion member 6 is identical to that of the protrusion member 600. A length ratio of 0% indicates that the shape of the protrusion member 6 extends from the third end 6c to the apex 6e. The height of the protrusion member 6 decreases monotonically from the apex 6e to the fourth end 6d. Therefore, as the length ratio decreases, the height of the protrusion member 6 at the fourth end 6d increases. From FIG. 29, it can be seen that the effect of reducing pressure loss decreases as the length ratio decreases. However, the relationship between the length ratio and pressure loss is not linear; pressure loss increases exponentially with a decrease in the length ratio. In other words, the increase in pressure loss with a decrease in the length ratio is relatively gradual. In other words, it can be said that the decrease in the effect of reducing pressure loss with a decrease in the length ratio is limited. Taking these points into consideration, L2' is set to satisfy the following condition. That is, if the height of the protrusion member 6 at the top 6e is H1 and the height of the protrusion member 6 at the fourth end 6d is H2, then 0.05H1≦H2≦0.90H1 holds. This allows for an improvement in flow rate while still enabling miniaturization. In particular, the length of the protrusion member 6 can be made shorter than that of the protrusion member 600. This allows for a reduction in the size of the protrusion member 6. Furthermore, compared to the protrusion member 600, the protrusion member 6 has fewer thin portions on the downstream side of the protrusion member 6, which may reduce the possibility of breakage of the protrusion member 6.

[0147] Here, it is preferable that the relationship between the protrusion member 600 and the height L satisfies 0.5d≦L≦5.0d. This can further reduce pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while still enabling miniaturization. As described above, L=L1+L2'+ΔL. If the reduction in height per unit length of the protrusion member 600 from the apex 6e to the fourth end 6d is constant, then (H1-H2) / L2'=H2 / ΔL. In other words, ΔL=H2 / (H1-H2)×L2'. Therefore, the equation 0.5d≦L≦5.0d can be rewritten using L1 and L2' as 0.5d≦L1+H1 / (H1-H2)×L2'≦5.0d. Therefore, in the protrusion member 6, if the inner diameter of the straight pipe 32 is d, the distance between the third end 6c and the top 6e in the direction of the central axis C3 of the straight pipe 32 is L1, and the distance between the top 6e and the fourth end 6d in the direction of the central axis C3 of the straight pipe 32 is L2', then it is preferable that 0.5d≦L1+H1 / (H1-H2)×L2'≦5.0d.

[0148] [1.2 Effects, etc.] The protruding member 6 described above is disposed in a straight pipe (upright pipe 3) located downstream of a bent pipe (second bent pipe 52) that changes the direction of the flow path, thereby partially reducing the cross-sectional area of ​​the flow path of the straight pipe. The protruding member 6 includes a first surface 60a having an outer circumferential portion 601 that can contact the inner circumferential surface of the straight pipe (inner circumferential surface 30a of the upright pipe 3), and a second surface 60b located opposite the first surface 60a and acting on the fluid flowing through the flow path. The outer circumferential portion 601 has a groove 603 along at least a portion of the outer periphery of the first surface 60a. This configuration improves flow rate while enabling miniaturization and reduces manufacturing costs. Furthermore, this configuration facilitates the process of fixing the protruding member to the straight pipe with an adhesive.

[0149] In the protruding member 6, the groove 603 is located at a position 1 mm or more and 15 mm or less from the outer periphery of the first surface. The width of the groove 603 is 0.5 mm or more and 3.0 mm or less. The depth of the groove 603 is 0.2 mm or more and 2.0 mm or less. This configuration makes it easier to fix the protruding member to the straight pipe with an adhesive.

[0150] In the protruding member 6, the groove 603 has a first inner surface 6031 corresponding to a first direction in which the first surface 60a and the second surface 60b face each other, and a second inner surface 6032 corresponding to a second direction perpendicular to the first direction. This configuration makes it easier to fix the protruding member to the straight pipe with an adhesive.

[0151] In the protruding member 6, if the inner diameter of the straight pipe (vertical pipe 3) is d, the maximum dimension of the first surface in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other is 0.38d or more and 1.00d or less. This configuration makes it easy to fix the protruding member to the straight pipe with an adhesive.

[0152] The protruding member 6 described above is disposed in a straight pipe (upright pipe 3) downstream of a bent pipe (second bent pipe 52) that changes the direction of the flow path, thereby partially reducing the cross-sectional area of ​​the flow path of the straight pipe. The protruding member 6 has a first surface 60a facing the inner circumferential surface of the straight pipe (inner circumferential surface 30a of the upright pipe 3) and a second surface 60b located opposite the first surface 60a and acting on the fluid flowing through the flow path. The first surface 60a includes an outer circumferential portion 601 that can contact the inner circumferential surface 30a and a central portion 602 recessed from the outer circumferential portion 601. This configuration improves flow rate while enabling compactness and reduces manufacturing costs. Furthermore, this configuration reduces the overflow of adhesive that secures the protruding member to the straight pipe.

[0153] In the protruding member 6, the dimension of the central portion 602 in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other is 10% to 40% of the maximum dimension of the first surface 60a in the second direction. This configuration can further reduce the overflow of the adhesive that fixes the protruding member to the straight pipe.

[0154] In the protruding member 6, the central portion 602 is symmetrical in the second direction with respect to the center line of the protruding member 6. This configuration can further reduce the overflow of adhesive that fixes the protruding member to the straight pipe.

[0155] In the protruding member 6, the central portion 602 is entirely surrounded by the outer peripheral portion 601. This configuration can further reduce the overflow of the adhesive that fixes the protruding member to the straight pipe.

[0156] The protrusion member 6 described above is disposed in a straight pipe (upright pipe 3) located downstream of a bent pipe (second bent pipe 52) that changes the direction of the flow path, thereby partially reducing the flow path cross-sectional area of ​​the straight pipe. The protrusion member 6 has a first surface 60a facing the inner circumferential surface of the straight pipe (inner circumferential surface 30a of the upright pipe 3) and a second surface 60b opposite the first surface 60a that acts on the fluid flowing through the flow path. The protrusion member 6 comprises a first portion 610 on the first end 6a side in a second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other, and a second portion 620 on the second end 6b side in the second direction. The second portion 620 has a protrusion 626 on the first surface 60a side of the second portion 620 that extends toward the first end 6a. The first portion 610 has a recess 616 on the first surface 60a side of the first portion 610 into which the protrusion 626 fits. The protrusion 626 and the recess 616 are located in a recessed position relative to the portion of the first surface 60a that can contact the inner circumferential surface 30a. This configuration improves the flow rate while enabling a compact design, thereby reducing manufacturing costs. Furthermore, this configuration reduces the possibility of separation between the first portion 610 and the second portion 620.

[0157] In the protruding member 6, the first surface 60a includes an outer peripheral portion 601 that can come into contact with the inner peripheral surface 30a, and a central portion 602 that is recessed from the outer peripheral portion 601. The protrusions 626 and the recesses 616 are located in the central portion 602. This configuration reduces the possibility that the protrusions 626 and the recesses 616 will get in the way when fixing the protruding member 6 to a straight pipe.

[0158] In the protruding member 6, the first portion 610 has a hollow first outer portion 611 having an opening 611b on a third surface 611a facing the second portion 620, and a first boss 612 extending from the first outer portion 611 toward the second portion 620. The second portion 620 has a hollow second outer portion 621 having an opening 621b on a fourth surface 621a facing the first portion 610, and a second boss 622 extending from the second outer portion 621 toward the first portion 610 and coupled to the first boss 612. This configuration can further reduce the possibility of separation between the first portion 610 and the second portion 620.

[0159] In the protruding member 6, the tip of the second boss 622 is located between the tip of the protrusion 626 and the fourth surface 621a in the second direction. This configuration makes it easy to join the first part 610 and the second part 620 together.

[0160] In the protruding member 6, the second outer portion 621 has a peripheral wall portion 625 that protrudes from the periphery of the opening 621b in the fourth surface 621a toward the first end 6a and surrounds the opening 621b in the fourth surface 621a. The first outer portion 611 has a receiving portion 615 around the opening 611b in the third surface 611a into which the peripheral wall portion 625 fits. In the second direction, the tip of the second boss 622 is located between the tip of the protrusion 626 and the tip of the peripheral wall portion 625. This configuration can reduce the possibility of fluid entering through a gap between the first part 610 and the second part 620. Furthermore, this configuration can facilitate the operation of joining the first part 610 and the second part 620.

[0161] The protruding member 6 has a third end 6c facing upstream in a third direction along the flow path, a fourth end 6d facing downstream, and a top portion 6e located between the third end 6c and the fourth end 6d and minimizing the cross-sectional area of ​​the flow path of the straight pipe (vertical pipe 3). This configuration can improve the flow rate while enabling miniaturization.

[0162] The protruding member 6 has a protruding portion 6i that extends from a portion between the top portion 6e and the fourth end 6d toward the center of the straight pipe (vertical pipe 3) when viewed from the third direction, but does not protrude beyond the top portion 6e. This configuration can improve the flow rate while enabling miniaturization.

[0163] In the protruding member 6, if the distance between the third end 6c and the fourth end 6d in the third direction is L and the distance between the third end 6c and the top 6e in the third direction is L1, then 0.1L≦L1≦0.5L is satisfied. This configuration can improve the flow rate while enabling miniaturization.

[0164] In the protruding member 6, when the maximum flow path cross-sectional area of ​​the straight pipe (vertical pipe 3) is A and the cross-sectional area of ​​the protruding member 6 at the top 6e is A1, A1 / A≦0.5. This configuration can improve the flow rate.

[0165] The protruding member 6 has an end face 68 at the fourth end 6d that intersects with the third direction. If the height at the top 6e is H1 and the height at the fourth end 6d is H2, then 0.05H1≦H2≦0.90H1. This configuration can improve the flow rate while enabling miniaturization.

[0166] The piping member 10 described above includes a protruding member 6 and a straight pipe (upright pipe 3), and the protruding member 6 is fixed to the straight pipe (upright pipe 3) with an adhesive. This configuration can improve the flow rate while enabling miniaturization, and can reduce manufacturing costs.

[0167] The piping system 1 described above comprises a vertical pipe 3, a horizontal pipe 4 located between the inlet 2b and the vertical pipe 3, a first bent pipe 51 located between the inlet 2b and the horizontal pipe 4, a second bent pipe 52 located between the horizontal pipe 4 and the vertical pipe 3, and a protruding member 6 arranged so that at least a portion of the vertical pipe 3 is a straight pipe. The protruding member 6 is fixed to the straight pipe (vertical pipe 3) with an adhesive. This configuration can improve the flow rate while enabling miniaturization and reducing manufacturing costs.

[0168] [2. Modifications] The embodiments of the present disclosure are not limited to the above-described embodiments. The above-described embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above-described embodiments are listed below. The modifications described below can be applied in appropriate combinations.

[0169] In one modified example, the riser pipe 3 may be configured with a single pipe material instead of multiple pipe materials. Even in this case, the protruding members 6 may be arranged so that at least a portion of the riser pipe 3 is a straight pipe. Here, the at least a portion of the riser pipe 3 is the entire riser pipe 3.

[0170] In one modified example, the protruding member 6 may not have an end surface 68. For example, the fourth end 6d of the protruding member 6 may be tapered when viewed in the width direction of the protruding member 6. This is the same configuration as the protruding member 600 shown in FIG. 28. In this case, the distance between the top 6e and the fourth end 6d in the direction of the central axis C3 of the standpipe 3 is defined as L2. L2 may be L2 = L - L1, and preferably L2 > L1. This can further reduce pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while still achieving compactness. Furthermore, if the inner diameter of the standpipe 3 is d and the distance between the third end 6c and the fourth end 6d in the direction of the central axis C3 of the standpipe 3 is L, then 0.5d ≦ L ≦ 5.0d may be satisfied. This can improve the flow rate.

[0171] In one variation, the protruding member 6 may not have the protrusion 6i.

[0172] In one variation, the second direction may correspond to the height of the protrusion member 6. That is, in the protrusion member 6, the first portion 610 may be configured as an upstream portion, and the second portion 620 may be configured as a downstream portion, which are separate members.

[0173] In one modified example, the protruding member 6 does not necessarily have to have an outer shape that is mirror-symmetrical with respect to a plane perpendicular to the second direction.

[0174] In one variation, the first portion 610 may not occupy the half of the protruding member 6 on the first end 6a side. The second portion 620 may not occupy the half of the protruding member 6 on the second end 6b side.

[0175] In one variation, the position of the protrusion 6i is not limited to the fourth end 6d, but may be between the apex 6e and the fourth end 6d. In one variation, the protrusion member 6 may have a plurality of protrusions 6i between the apex 6e and the fourth end 6d. The protrusions 6i may be formed integrally with the protrusion member 6, or may be formed separately and attached thereto.

[0176] In one modified example, the first side surface 62 and the second side surface 63 of the protrusion member 6 may have a shape that is asymmetric with respect to the center line of the protrusion member 6 along the central axis C3 of the standpipe 3. The shapes of the first side surface 62 and the second side surface 63 may be set individually depending on the installation environment of the piping system 1 or the piping member 10, and do not necessarily have to be a shape that is symmetric with respect to the center line of the protrusion member 6 along the central axis C3 of the standpipe 3.

[0177] In one variant, the protruding member 6 does not necessarily have to have an end surface 66 .

[0178] In one modified example, the shape, number, and arrangement of the protrusions 67 of the protrusion member 6 may be changed as appropriate depending on the shape, number, and arrangement of the holes 3c of the standpipe 3. For example, the first portion 67a and the second portion 67b of the protrusion 67 may also serve as gates when forming the first portion 610 and the second portion 620 of the protrusion member 6 by injection molding. The holes 3c may be cutouts. The position of the holes 3c is not limited to the upstream end portion 3a. The protrusions 67 and the holes 3c are preferably provided so as to facilitate positioning of the protrusion member 6 relative to the standpipe 3. However, the protrusion member 6 does not necessarily have to have the protrusions 67.

[0179] In one variant, the protruding member 6 does not have to be entirely contained within the riser pipe 3. In particular, the fourth end 6d of the protruding member 6 may protrude from the riser pipe 3 to the outside.

[0180] In one modified example, the shape and size of part or all of the piping system 1 may be different from those of the above embodiment. For example, unlike the above embodiment, in the piping system 1, the shapes of the first and second bent pipes 51 and 52, the vertical pipe 3, and the horizontal pipe 4 may be polygonal rather than circular.

[0181] In one variation, each of the first and second bent pipes 51, 52 may be selected from a 90° elbow (so-called DL) specified in JIS K 6739, a 90° large bend elbow (so-called LL), and a 45° elbow (so-called 45L) specified in JIS K 6739. The dimensions of the first and second bent pipes 51, 52 do not necessarily have to be set in accordance with the standard of JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0182] In one variant, the piping system 1 does not necessarily have to include the eaves gutter 2. For example, if the building 11 has a structure with a water collection port, such as a balcony, the first bent pipe 51 of the piping system 1 may be connected to the water collection port of the building 11.

[0183] In one modified example, the drain 7 may have a structure that is generally not considered to contribute to the occurrence or promotion of the siphoning phenomenon. In one modified example, the piping system 1 does not necessarily have to include the drain 7. The drain 7 is not an essential component of the piping system 1, and may be provided as appropriate taking into consideration the installation environment of the piping system 1, etc.

[0184] In one modified example, the piping system 1 is not limited to a gutter system, which is a type of drainage system, but may be other drainage systems such as a sewage system, or may be applied to a water supply system such as a drinking water system. In other words, the protrusion member or piping member can be used in a system that supplies water or drains water.

[0185] [3. Aspects] As is apparent from the above-described embodiment and modifications, the present disclosure includes the following aspects.

[0186] [Aspect 1] a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface having an outer circumferential portion capable of contacting an inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with The outer periphery has a groove along at least a part of the outer periphery of the first surface. Protruding member.

[0187] [Aspect 2] the groove is located at a position that is 1 mm or more and 15 mm or less from the outer periphery of the first surface, The width of the groove is 0.5 mm or more and 3.0 mm or less, The depth of the groove is 0.2 mm or more and 2.0 mm or less. The protruding member of embodiment 1.

[0188] [Aspect 3] The groove has a first inner surface corresponding to a first direction in which the first surface and the second surface face each other, and a second inner surface corresponding to a second direction perpendicular to the first direction. The protruding member of embodiment 1 or 2.

[0189] [Aspect 4] When the inner diameter of the straight pipe is d, the maximum dimension of the first surface in a second direction perpendicular to the first direction in which the first surface and the second surface face each other is 0.38d or more and 1.00d or less. The protrusion member according to any one of Embodiments 1 to 3.

[0190] [Aspect 5] a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface facing the inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with The first surface is an outer circumferential portion capable of contacting the inner circumferential surface; a central portion recessed from the outer periphery; Including, Protruding member.

[0191] [Aspect 6] a dimension of the central portion in a second direction perpendicular to a first direction in which the first surface and the second surface face each other is 10% or more and 40% or less of a maximum dimension of the first surface in the second direction; The protruding member of embodiment 5.

[0192] [Aspect 7] the central portion is symmetrical with respect to the center line of the protrusion member in the second direction. The protrusion member of embodiment 6.

[0193] [Aspect 8] The central portion is entirely surrounded by the outer periphery. The protrusion member according to any one of embodiments 5 to 7.

[0194] [Aspect 9] a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface facing the inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with a first portion on a first end side in a second direction perpendicular to a first direction in which the first surface and the second surface face each other, and a second portion on a second end side in the second direction are separate bodies; the second portion has a protrusion on the first surface side of the second portion that extends toward the first end, the first portion has a recess on the first surface side of the first portion into which the protrusion fits, the protrusion and the recess are located at positions recessed from a portion of the first surface that can contact the inner circumferential surface; Protruding member.

[0195] [Aspect 10] The first surface is an outer circumferential portion capable of contacting the inner circumferential surface; a central portion recessed from the outer periphery; Including, the protrusion and the recess are in the central portion; The protruding member of embodiment 9.

[0196] [Aspect 11] The first portion is a hollow first outer portion having an opening on a third surface facing the second portion; a first boss extending from the first outer portion toward the second portion; and The second portion is a hollow second outer portion having an opening on a fourth surface facing the first portion; a second boss extending from the second outer portion toward the first portion and coupled to the first boss; having The protrusion member of embodiment 10.

[0197] [Aspect 12] In the second direction, a tip of the second boss is located between a tip of the protrusion and the fourth surface. The protrusion member of embodiment 11.

[0198] [Aspect 13] the second outer portion has a peripheral wall portion that protrudes from the periphery of the opening in the fourth surface toward the first end and surrounds the opening in the fourth surface, the first outer portion has a receiving portion around the opening of the third surface into which the peripheral wall portion fits, In the second direction, a tip of the second boss is located between a tip of the protrusion and a tip of the peripheral wall portion. The protruding member of embodiment 12.

[0199] [Aspect 14] a third end facing upstream and a fourth end facing downstream in a third direction along the flow path; a top portion between the third end and the fourth end, which makes the flow path cross-sectional area of ​​the straight pipe the smallest; Equipped with The protrusion member according to any one of embodiments 1 to 13.

[0200] [Aspect 15] a protruding portion extending from a portion between the top and the fourth end toward the center of the straight pipe when viewed from the third direction, but not protruding beyond the top; The protruding member of embodiment 14.

[0201] [Aspect 16] The distance between the third end and the fourth end in the third direction is L, When the distance between the third end and the apex in the third direction is L1, 0.1L≦L1≦0.5L; The protruding member of embodiment 14 or 15.

[0202] [Aspect 17] The maximum flow cross-sectional area of ​​the straight pipe is A, If the cross-sectional area of ​​the protruding member at the top is A1, A1 / A≦0.5; The protrusion member according to any one of embodiments 14 to 16.

[0203] [Aspect 18] The fourth end has an end face that intersects with the third direction, If the height at the top is H1 and the height at the fourth end is H2, 0.05H1≦H2≦0.90H1; The protrusion member according to any one of embodiments 14 to 17.

[0204] [Aspect 19] A protrusion member according to any one of aspects 1 to 18; The straight pipe; Equipped with The protruding member is fixed to the straight pipe by an adhesive. Piping components.

[0205] [Aspect 20] Vertical pipe and a horizontal pipe located between the inlet and the vertical pipe; a first bent pipe located between the inlet and the horizontal pipe; a second bent pipe located between the horizontal pipe and the vertical pipe; A protrusion member according to any one of aspects 1 to 19, in which at least a portion of the vertical pipe is arranged as the straight pipe; Equipped with The protruding member is fixed to the straight pipe by an adhesive. Piping system.

[0206] Aspects 2 to 18 are optional and not essential. [Industrial Applicability]

[0207] The present disclosure is applicable to a protrusion member, a piping member, and a piping system. Specifically, the present disclosure is applicable to a protrusion member for changing a flow path cross-sectional area, a piping member including a protrusion member, and a piping system including a piping member. [Explanation of symbols]

[0208] 1 Piping System 2b Inlet 3 Vertical pipe (straight pipe) 4 horizontal pipe 51 1st bend pipe 52 2nd bent pipe (bent pipe) 6 Protruding parts 6a 1st end 6b 2nd end 6c 3rd end 6d 4th end 6e top 6i Protrusion 60a Page 1 601 Outer periphery 602 Central part 603 Groove 6031 1st inner surface 6032 Second inner surface 60b 2nd side 610 Part 1 611 First Outer Wall 611a 3rd page 611b aperture 612 First Boss 615 Receiving part 616 Recess 620 Part 2 621 Second Outer Wall 621a 4th page 621b aperture 622 Second Boss 625 Peripheral wall section 626 Protrusion 10 Piping components

Claims

1. a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface having an outer circumferential portion capable of contacting an inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with the outer periphery has a groove along at least a part of the outer periphery of the first surface; Protruding member.

2. the groove is located at a position that is 1 mm or more and 15 mm or less from the outer periphery of the first surface, The width of the groove is 0.5 mm or more and 3.0 mm or less, The depth of the groove is 0.2 mm or more and 2.0 mm or less. The protruding member of claim 1.

3. The groove has a first inner surface corresponding to a first direction in which the first surface and the second surface face each other, and a second inner surface corresponding to a second direction perpendicular to the first direction. The protruding member of claim 1 .

4. When the inner diameter of the straight pipe is d, the maximum dimension of the first surface in a second direction perpendicular to the first direction in which the first surface and the second surface face each other is 0.38d or more and 1.00d or less. The protruding member of claim 1.

5. a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface facing an inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with The first surface is an outer circumferential portion capable of contacting the inner circumferential surface; a central portion recessed from the outer periphery; Including, Protruding member.

6. a dimension of the central portion in a second direction perpendicular to a first direction in which the first surface and the second surface face each other is 10% or more and 40% or less of a maximum dimension of the first surface in the second direction; The protruding member according to claim 5.

7. the central portion is symmetrical with respect to a center line of the protrusion member in the second direction. The projection member of claim 6.

8. The central portion is entirely surrounded by the outer periphery. The protruding member according to claim 5.

9. a protrusion member disposed in a straight pipe disposed downstream of a bent pipe that changes the direction of a flow path, the protrusion member partially reducing a flow path cross-sectional area of ​​the straight pipe, a first surface facing an inner circumferential surface of the straight pipe; a second surface opposite the first surface that acts on the fluid flowing through the flow path; Equipped with a first portion on a first end side in a second direction perpendicular to a first direction in which the first surface and the second surface face each other, and a second portion on a second end side in the second direction are separate bodies; the second portion has a protrusion on the first surface side of the second portion that extends toward the first end, the first portion has a recess on the first surface side of the first portion into which the protrusion fits, the protrusion and the recess are located at positions recessed from a portion of the first surface that can contact the inner circumferential surface; Protruding member.

10. The first surface is an outer circumferential portion capable of contacting the inner circumferential surface; a central portion recessed from the outer periphery; Including, the protrusion and the recess are in the central portion; The projection member of claim 9.

11. The first portion is a hollow first outer portion having an opening on a third surface facing the second portion; a first boss extending from the first outer portion toward the second portion; and The second portion is a hollow second outer portion having an opening on a fourth surface facing the first portion; a second boss extending from the second outer portion toward the first portion and coupled to the first boss; having The projection member of claim 10.

12. In the second direction, a tip of the second boss is located between a tip of the protrusion and the fourth surface. The projection member of claim 11.

13. the second outer portion has a peripheral wall portion that protrudes from the periphery of the opening in the fourth surface toward the first end and surrounds the opening in the fourth surface, the first outer portion has a receiving portion around the opening in the third surface into which the peripheral wall portion fits, In the second direction, a tip of the second boss is located between a tip of the protrusion and a tip of the peripheral wall portion. The projection member of claim 12.

14. a third end facing upstream and a fourth end facing downstream in a third direction along the flow path; a top portion between the third end and the fourth end, which makes the flow path cross-sectional area of ​​the straight pipe the smallest; Equipped with The protruding member according to any one of claims 1 to 13.

15. a protruding portion extending from a portion between the top and the fourth end toward the center of the straight pipe as viewed from the third direction, but not protruding beyond the top; The projection member of claim 14.

16. The distance between the third end and the fourth end in the third direction is L, When the distance between the third end and the top in the third direction is L1, 0.1L≦L1≦0.5L, The projection member of claim 14.

17. The maximum flow path cross-sectional area of ​​the straight pipe is A, If the cross-sectional area of ​​the protruding member at the top is A1, A1 / A≦0.5; The projection member of claim 14.

18. The fourth end has an end surface that intersects with the third direction, If the height at the top is H1 and the height at the fourth end is H2, 0.05H1≦H2≦0.90H1; The projection member of claim 14.

19. A protruding member according to any one of claims 1 to 13; The straight pipe; Equipped with The protruding member is fixed to the straight pipe by an adhesive. Piping components.

20. Vertical pipe and a horizontal pipe located between the inlet and the vertical pipe; a first bent pipe located between the inlet and the horizontal pipe; a second bent pipe located between the horizontal pipe and the vertical pipe; A protrusion member according to any one of claims 1 to 13, wherein at least a part of the vertical pipe is arranged as the straight pipe; Equipped with The protruding member is fixed to the straight pipe by an adhesive. Piping system.

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