Drainage pipe fittings
The drainage pipe joint with a circular cross-section and flow deflection plate effectively prevents clogging and maintains flow deflection, addressing manufacturing cost issues in high-rise building drainage systems.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KUBOTA CHEMIX CO LTD
- Filing Date
- 2024-09-26
- Publication Date
- 2026-06-19
AI Technical Summary
Existing drainage pipe joints for high-rise buildings face challenges in preventing clogging by solid objects while maintaining sufficient flow deflection, often resulting in complex structures that increase manufacturing costs.
A drainage pipe joint with a horizontal branch pipe connection having a circular cross-section and a flow deflection plate that includes a blocking section and a blockage prevention section, featuring an arc-shaped notch to deflect and prevent blockage without protruding into the body, simplifying the design and reducing manufacturing costs.
The solution provides effective flow deflection and prevents clogging by solid objects, maintaining a circular cross-sectional structure to avoid increased costs and ensure smooth drainage flow.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a drainage pipe joint used for drainage pipes in high-rise apartment buildings and the like. In particular, the present invention relates to a drainage pipe joint that can prevent clogging by an object (such as dirt or toilet paper, which may be described as a solid object) that inhibits the flow of drainage while having a sufficient bias flow function.
Background Art
[0002] Water supply facilities and drainage facilities are provided in apartment buildings, office buildings, and the like. Among these, a drainage pipe structure including a vertical pipe that penetrates vertically through each floor of a building, a horizontal pipe installed within each floor, and a drainage pipe joint that connects these is widely known as a typical example. As a drainage pipe joint that connects these vertical pipes and horizontal pipes, it is common to have a side opening on the side surface of a cylindrical body portion having a vertical axis, a horizontal branch pipe connection portion provided at the side opening, and an upper riser connection portion and a lower riser connection portion provided at the upper and lower openings of the body portion. When using such a drainage pipe joint for drainage pipes in high-rise apartment buildings and the like, various conditions required other than drainage capacity include that the passing ball diameter of the branch pipe inlet is not less than a predetermined value and an object (solid object) that inhibits the flow of drainage containing dirt does not clog, and that the washing drainage performance is excellent.
[0003] Japanese Patent Publication No. 2004-092226 (Patent Document 1), related to another application by the present applicant, discloses a drainage manifold that satisfies these conditions. The drainage manifold disclosed in Patent Document 1 is a drainage manifold having a cylindrical body with a vertical axis, a side opening on the side of the body, a horizontal branch pipe connection portion provided in the side opening, and an upper riser pipe connection portion and a lower riser pipe connection portion provided in the upper and lower openings of the body, wherein a backflow prevention portion is formed to protrude in the diameter direction of the body on the inner surface of the body above the side opening to prevent drainage flowing down from above from flowing back into the side opening, and an axial deflection portion is formed to protrude in the diameter direction of the body on the inner surface of the body above the backflow prevention portion, on the left side when viewed from the axis center of the body towards the axis of the body, and the amount of protrusion of the axial deflection portion is greater than the amount of protrusion of the backflow prevention portion (Claim 1 of Patent Document 1). Furthermore, in this drainage manifold, the lateral branch pipe connection is provided with a lateral flow deflection section that deflects the drainage flowing from the lateral branch pipe to the lateral opening to the left when viewed from the axial center of the main body to the lateral opening (Claim 2 of Patent Document 1). Also, in this drainage manifold, when viewed from the axial center of the main body to the lateral opening, the left side surface of the lateral branch pipe connection is provided with a bulge that is widened to the left (Claim 6 of Patent Document 1). [Prior art documents] [Patent Documents]
[0004] [Patent Document 1] Japanese Patent Publication No. 2004-092226 [Overview of the project] [Problems that the invention aims to solve]
[0005] In the drainage manifold disclosed in Patent Document 1 mentioned above, a side flow deflection section is provided to direct the wastewater flowing in from the lateral branch pipes to a sideways direction. This allows for smooth merging of large amounts of wastewater from toilets and the like with the wastewater flowing down from the vertical pipe. Furthermore, when viewing the side opening from the axis center of the main body, the left side of the lateral branch pipe connection section is a bulging section that expands to the left. This ensures that the diameter of the ball passing through the branch pipe inlet is greater than a predetermined size, preventing blockages caused by objects (solids) that obstruct the flow of wastewater containing sewage.
[0006] As described above, the drain manifold disclosed in Patent Document 1 has been well-received for its high-performance drainage capabilities, possessing sufficient flow deflection function while preventing blockages caused by objects (solids) that obstruct the flow of wastewater. However, while it is equipped with a side flow deflection section to direct wastewater flowing in from the horizontal branch pipes sideways, allowing large amounts of wastewater from toilets and the like to smoothly merge with wastewater flowing down from the vertical pipe, the left side of the branch pipe connection section, which is opposite the side flow deflection section, is equipped with a bulge that is widened to the left to prevent blockages caused by solids. Therefore, it can be pointed out that the structure of the drain manifold disclosed in Patent Document 1 is more complex (compared to a substantially circular cross-section structure without a bulge) due to the need to provide this bulge, which may increase manufacturing costs.
[0007] The present invention was developed in view of the above-mentioned problems, and its objective is to provide a drainage pipe fitting for use in drainage piping of high-rise apartment buildings and the like, which has sufficient flow deflection function and can prevent clogging by objects (solids) that obstruct the flow of drainage. [Means for solving the problem]
[0008] To achieve the above objective, the drainage pipe joint according to the present invention employs the following technical means. In other words, the drainage pipe joint according to the present invention is a drainage pipe joint having a side opening on the side of a cylindrical body having a vertical axis, a horizontal branch pipe connection part provided in the side opening, and an upper riser pipe connection part and a lower riser pipe connection part provided in the upper and lower openings of the body, wherein the drainage pipe joint is characterized in that the horizontal branch pipe connection part has a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection part, and includes a flow deflection plate that includes a wall surface that closes a part of the left side or a part of the right side of the circular cross-section in order to deflect the drainage flowing from the horizontal branch pipe into the side opening to either the left or the right.
[0009] Preferably, the lateral branch pipe connection portion can be configured so as not to have a bulge that expands in a direction away from the vertical axis at a position facing the flow deflection plate when viewed from the opening side of the upper and lower openings of the body portion. More preferably, the wall surface can be configured so that it does not protrude into the body when viewed from the opening side of the upper and lower openings of the body.
[0010] More preferably, the flow deflection plate can be configured to consist of a blocking section for generating the flow deflection by blocking the drainage and a blockage prevention section for preventing blockage by objects that obstruct the flow of the drainage. More preferably, the blocking portion can be configured to consist of an upper blocking portion located at a higher position than the blockage prevention portion and a lower blocking portion located at a lower position.
[0011] More preferably, the lower blocking section may be configured to have at least one of the following functions: a function to drain the object into the body by causing it to float when the flow rate of the wastewater is high, and a function to deflect the wastewater when the flow rate of the wastewater is low. More preferably, the cross-sectional area through which the wastewater can flow can be configured to be larger at the bottom than at the top.
[0012] More preferably, the blockage prevention portion can be configured such that a part of the wall surface of the blocking portion is cut out. More preferably, the blockage prevention portion can be configured such that a part of the wall surface of the blocking portion is cut out by an arc-shaped notch. More preferably, from the base end of the side opening in the blocking section to the blockage prevention section The distance can be configured such that the lower side is shorter than the upper side.
[0013] More preferably, the radius of the notched arc can be configured to be 15% or more and 200% or less of the inner diameter of the lateral branch pipe connection. More preferably, the maximum horizontal length from the vertical axis to the notched arc can be configured to be 3% or more and 40% or less of the inner diameter of the lateral branch pipe connection. More preferably, the center of the notched arc can be configured to be located below the center of the inner diameter of the lateral branch pipe connection portion, within a range of 1% to 30% from the center of the inner diameter. [Effects of the Invention]
[0014] According to the present invention, it is possible to provide a drainage pipe fitting used in drainage piping for high-rise apartment buildings and the like, which has sufficient flow deflection function while preventing blockage by objects (solids) that obstruct the flow of drainage. [Brief explanation of the drawing]
[0015] [Figure 1] (A) is a top view and (B) is a side view showing a drainage piping structure employing the drainage piping joint 100 according to an embodiment of the present invention. [Figure 2] This is an exploded perspective view showing a drainage piping structure employing the drainage piping joint 100 according to an embodiment of the present invention. [Figure 3] This is a side view of the drainage pipe fitting 100. [Figure 4] (A) External perspective view (side view) of the drain pipe fitting 100, and (B) External perspective view (bottom to top) of the drain pipe fitting 100. [Figure 5]Cross-sectional views of the drain pipe joint as seen from the side opening 112 of the body 110, showing (A) a virtual passing sphere that can flow from the lateral branch pipe into the side opening in the drain pipe joint 100 with the deflector plate 200, and (B) a virtual passing sphere that can flow from the lateral branch pipe into the side opening in the drain pipe joint 102 with a deflector plate 202 different from the deflector plate 200. [Figure 6] Side view (A), cross-sectional view 6B in Fig. 6(A) (B), enlarged view of the deflector plate (C), and enlarged view 6D in Fig. 6(B) (D) of the drain pipe joint 400 having technical features common to the drain pipe joint 100 according to an embodiment of the present invention. [Figure 7] Side view of the drain pipe joint 500 according to a modification of the embodiment of the present invention.
Mode for Carrying Out the Invention
[0016] Hereinafter, the drain pipe joint 100 according to the embodiment of the present invention will be described in detail with reference to Figs. 1 to 5, the drain pipe joint 400 having technical features common to the drain pipe joint 100 according to the embodiment of the present invention will be described in detail with reference to Fig. 6, and the drain pipe joint 500 according to the modification of the embodiment of the present invention will be described in detail with reference to Fig. 7. For the drain pipe joint 100 and the drain pipe joint 400 having common technical features, the same reference numerals are given to the reference numerals in the drawings for the common technical features, and for the common technical features, either the drain pipe joint 100 or the drain pipe joint 400 may be used for the description.
[0017] Here, the drain pipe joint 100 has lateral branch pipe connection parts 120 in three directions, while the drain pipe joints 400 and 500 have lateral branch pipe connection parts 120 only in one direction. The drain pipe joint according to the present invention is not particularly limited as long as it has one or more lateral branch pipe connection parts in addition to an upper vertical pipe connection part and a lower vertical pipe connection part. Note that due to the number of lateral branch pipe connection parts, the presence or absence of the backflow prevention rib 300 for preventing backflow from one lateral branch pipe to another (the backflow prevention rib 300 is not necessary for the drain pipe joints 400 and 500 that have lateral branch pipe connection parts 120 only in one direction) and the number of the backflow prevention ribs 300 are different, which will be described later. Here, this is not the case when the backflow prevention rib (backflow prevention part, backflow prevention plate) has a function of preventing the drain flowing down from above from flowing back into the side opening, and the drain pipe joints 400 and the drain pipe joint 500 may have a backflow prevention rib. The backflow prevention rib 300 in the present embodiment is for preventing backflow from one lateral branch pipe to another, and since its relevance to the technical features of the present invention is low, it will be described that the drain pipe joints 400 and 500 do not have the backflow prevention rib 300 provided in the drain pipe joint 100.
[0018] Furthermore, a common technical feature of drainage pipe fitting 100 and drainage pipe fitting 400 is a structure that has sufficient flow deflection function while preventing blockage by objects (solids) that obstruct the flow of drainage, which will be explained in detail mainly with reference to Figure 6. Here, only an overview of the common technical features is given below. The common technical features of the drainage pipe fittings 100 and 400 are as follows: the lateral branch pipe connection portion 120 has a circular cross-section centered on the lateral axis of the lateral branch pipe connection portion 120 (where the circular cross-section means, for example, that it does not have a bulging portion like the one disclosed in Patent Document 1 which bulges out from the circular cross-section), and a flow deflection plate 200 is provided which includes a wall surface that closes a part of the left or right side of this circular cross-section in order to deflect the drainage flowing from the lateral branch pipe into the side opening 112 to either the left or the right, and more specifically, the flow deflection plate 200 includes a blocking portion 210 for generating a deflection by blocking the drainage and a blockage prevention portion 220 for preventing blockage by objects that obstruct the flow of drainage, and the blockage prevention portion 220 is formed by cutting out a part of the wall surface of the blocking portion 210 with an arc-shaped notched arc 222.
[0019] Here, the figures 1 to 7 are schematic representations that include omissions of configurations less relevant to the present invention, and therefore, the consistency between the figures may not be perfectly consistent. As shown in Figures 1 and 2, the drainage piping structure using the drainage piping joint 100 according to an embodiment of the present invention comprises a drainage piping joint 100, part of which is provided in a through-hole that penetrates vertically through the floor slab S in a building; an upper riser pipe on the upper floor side, connected (via an upper riser pipe connecting member) to the upper riser pipe connection part 140 of the drainage piping joint 100 above the floor slab S to allow drainage from the upper floor to flow in; horizontal branch pipes (three of each in this case) connected (via a horizontal riser pipe connecting member) to the horizontal branch pipe connection part 120 of the drainage piping joint 100 above the floor slab S; and a lower riser pipe on the lower floor side (a reduced diameter pipe with swirling vanes and a straight pipe) connected to the lower riser pipe connection part 160 of the drainage piping joint 100 below the floor slab S to allow drainage to flow to the lower floor. The drainage piping structure using the drainage pipe fitting 100 shown here is one adopted on floors other than the lowest floor. However, the drainage piping structure using the drainage pipe fitting 100 according to this embodiment can also be adopted on the lowest floor. In the case of the lowest floor, one example is that the lower riser pipe is composed of a lower riser pipe (straight pipe) and a 90-degree bend pipe. Note that these drainage piping structures are just examples, and the drainage pipe fitting 100 according to the present invention is not limited to the drainage piping structures illustrated. Here, since they have little relevance to the technical features of the present invention, vibration damping materials, vibration insulators, sound insulation covers, etc., provided on the lower riser pipe (reduced diameter pipe with swivel vanes) will not be described.
[0020] As shown in Figures 1 to 5, the drain pipe fitting 100 has a cylindrical body portion 110 having a vertical axis (hereinafter the cylindrical body portion 110 may be simply referred to as body portion 110), with a side opening 112 on its side, and a horizontal branch pipe connection portion 120 provided in the side opening 112, and an upper riser pipe connection portion 140 and a lower riser pipe connection portion 160 provided in the upper and lower openings (upper opening 114 and lower opening 116) of the body portion 110, respectively. As described above, in the drain pipe fitting 100 shown in Figures 1 to 5, the side opening 112 and the horizontal branch pipe connection portion 120 provided therein are provided at three locations at 90° intervals in a plan view, while in the drain pipe fitting 400 shown in Figure 6 (the same applies to the drain pipe fitting 500 related to the modified example shown in Figure 7), the side opening 112 and the horizontal branch pipe connection portion 120 provided therein are provided at only one location.
[0021] Furthermore, the drainage pipe joint 100 has a horizontal branch pipe connection section 120 with a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection section 120, and the drainage flowing from the horizontal branch pipe into the side opening 112 is divided into left and right sections. The drainage pipe joint 100 includes a flow deflection plate 200 which includes a wall surface that closes off a portion of the left or right side of the circular cross-section in order to deflect the flow to one side. In this embodiment, as shown in Figures 5 and 6, the flow deflection plate 200 includes a wall surface (more specifically, a blocking portion 210 and a blockage prevention portion 220) that closes off a portion of the left side of the circular cross-section of the lateral branch pipe connection portion 120. This is because the drainage pipe joint 100 is provided with a swirling vane as shown in Figure 2 in the drainage pipe joint 100 on each floor, which generates a counterclockwise swirling flow when the upper or lower riser is viewed from vertically above (in Figures 4(B) and 6(B), the swirling flow is shown clockwise because the drainage pipe joint 100 is viewed from below), and by deflecting the drainage from the lateral branch pipe to the right (by stopping or weakening the flow on the left side), the drainage from the lateral branch pipe can be joined with less resistance to the drainage that is swirling and flowing down from above in a counterclockwise direction.
[0022] Here, the horizontal branch pipe connection portion 120 does not have a bulge that expands in a direction away from the vertical axis of the cylindrical body portion 110 at a position facing the flow deflection plate 200 when viewed from the opening side of the upper and lower openings (upper opening 114 and lower opening 116) of the body portion 110. In other words, in this drainage pipe joint 100, the horizontal branch pipe connection portion 120 has a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection portion 120, and does not have a bulge that expands from the circular cross-section (for example, as disclosed in Patent Document 1). Therefore, because there is no need to provide such a bulge, the cross-sectional structure of the body portion 100 of the drainage pipe joint 100 becomes a substantially circular structure, which simplifies the design and suppresses the risk of increased manufacturing costs. It should be noted later that even without such a bulge, clogging by objects (solids) that obstruct the flow of drainage can be prevented.
[0023] Furthermore, when viewed from the opening side of the upper and lower openings (upper opening 114 and lower opening 116) of the body 110, the wall surface constituting the flow deflection plate 200 does not protrude into the body 110. In other words, in this drainage pipe joint 100, the horizontal branch pipe connection part 120 has a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection part 120, and the wall surface constituting the flow deflection plate 200 does not protrude into the body 110 like the backflow prevention rib 300 shown in Figure 3 or Figure 4. Therefore, since there is no need to provide a flow deflection plate 200 that protrudes into the body 110, the cross-sectional structure of the body 100 of the drainage pipe joint 100 becomes a substantially circular structure, which simplifies the design and suppresses the risk of increased manufacturing costs. In addition, because the flow deflection plate 200 does not protrude into the body 110, it is possible to suppress obstruction of the flow of wastewater flowing from top to bottom through the body 110. Thus, the fact that the flow deflection plate 200, which deflects the wastewater flowing from the lateral branch pipe into the side opening 112 to either the left or right, does not protrude into the body 110, and that the wall surface of the flow deflection plate 200 is shaped as if it extends along the circular cross-section of the body, is a feature that differs significantly from both the aforementioned backflow prevention ribs and conventional flow deflection plates.
[0024] More specifically, the flow deflection plate 200 consists of a blocking section 210 (more specifically, an upper blocking section 210U and a lower blocking section 210D) for generating a flow deflection by blocking the drainage (from the horizontal branch pipe to the body 110 of the drainage pipe fitting 100), and a blockage prevention section 220 for preventing blockage by objects (solids such as sewage and toilet paper) that obstruct the flow of drainage (from the horizontal branch pipe to the body 110 of the drainage pipe fitting 100). Because the flow deflection plate 200 is equipped with such a blockage prevention section 220, as described above, it can prevent blockage by objects (solids) that obstruct the flow of drainage without having a bulging section like the one disclosed in Patent Document 1.
[0025] More specifically, the following will be explained with reference to Figure 5, a cross-sectional view of the drain pipe fitting 100 as seen from the body portion 110 to the side opening 112 (viewed outward from the center of the vertical axis in the drain pipe fitting 100). Figure 5(A) shows a hypothetical sphere (diameter PB(1)) that can flow from the lateral branch pipe to the side opening in a drain pipe fitting 100 equipped with a flow deflection plate 200 having a blockage prevention portion 220, and Figure 5(B) shows a hypothetical sphere that can flow from the lateral branch pipe to the side opening in a drain pipe fitting 102 equipped with a flow deflection plate 202 different from the flow deflection plate 200 and without a blockage prevention portion 220. This shows the hypothetical passing sphere (diameter PB(2)). When the inner diameter φd of the lateral branch pipe connection part 120 is 102.8 mm (when the lateral branch pipe connection part 120 side connects a lateral branch pipe connection member with a nominal diameter of 100 to the lateral branch pipe connection part 120), the diameter of the hypothetical passing sphere PB(1) is 68 mm, while PB(2) is 60 mm, an improvement of 13.3%.
[0026] More specifically, as shown in Figure 6, the shut-off section 210 consists of an upper shut-off section 210U located higher than the blockage prevention section 220, and a lower shut-off section 210D located lower than the blockage prevention section 220. Naturally, the upper shut-off section 210U is located above the lower shut-off section 210D (and therefore above the blockage prevention section 220). The lower shutoff section 210U has at least one of the following functions: a function to drain objects (solids) into the body section 110 by causing them to float when the flow rate of drainage (from the horizontal branch pipe to the drainage pipe fitting 100) is high, and a function to deflect the drainage when the flow rate of drainage (from the horizontal branch pipe to the drainage pipe fitting 100) is low. As a result, it has sufficient deflection function even when the flow rate of drainage from the horizontal branch pipe to the drainage pipe fitting 100 is low, while preventing blockage by objects (solids) that obstruct the flow of drainage when the flow rate of drainage from the horizontal branch pipe to the drainage pipe fitting 100 is high.
[0027] As shown in Figures 3 to 6, the cross-sectional area through which drainage (from the horizontal branch pipe to the drainage pipe fitting 100) can flow is larger at the bottom than at the top. Furthermore, the blockage prevention section 210 is formed by a shape in which a part of the wall surface of the blocking section 220 is cut out. Furthermore, the blockage prevention section 210 is formed by a shape in which a part of the wall surface of the blocking section 220 is cut out by an arc-shaped notch arc 222. In addition, the distance from the base end BC of the side opening in the blocking section 210 to the blockage prevention section 220 is shorter at the bottom than at the top (LU > LC).
[0028] Furthermore, as shown in the modified drainage pipe fitting 500 in Figure 7, the blockage prevention section 610 may be formed by a shape in which a part of the wall surface of the shut-off section 620 is cut out by an arc-shaped notched arc 622. In this drainage pipe fitting 500 as well, the cross-sectional area through which drainage (from the horizontal branch pipe to the drainage pipe fitting 100) can flow is larger at the bottom than at the top, and the blockage prevention section 610 is formed by a shape in which a part of the wall surface of the shut-off section 620 is cut out, and the shut-off section 610 is more specifically formed by an upper shut-off section 610U and a lower shut-off section 610D, and the blockage prevention section 610 is formed by a shape in which a part of the wall surface of the shut-off section 620 is cut out by an arc-shaped notched arc 622.
[0029] These characteristics can also be explained as follows: As shown in Figure 6(C), the wall surface of the drift plate 200 can be configured such that, for example, it is formed by an arc with a radius equal to the inner diameter (φd) of the lateral branch pipe connection 120 and a chord of that arc, and part or all of the chord is cut out (in this case, part is cut out by an arc-shaped notched arc 222, and in Figure 7, all of the chord is cut out by an arc-shaped notched arc 622). Note that in Figure 6, the chord and the vertical axis of the body 110 are parallel in a side view, but in Figure 7, the chord and the vertical axis of the body 110 are not parallel in a side view.
[0030] In the drainage pipe fitting 100 shown in Figure 6, at the wall surface where a portion of the chord is cut out (i.e., the cut-off portion 210), the length of the remaining chord is shorter on the lower side than on the upper side (LU > LC). This means that at the wall surface where a portion of the chord is cut out, the length of the remaining chord is shorter on the lower side (length of the lower chord LD) than on the upper side (length of the upper chord LC). Here, in Figure 6, LC represents the length of the chord that remains after being cut out by the notched arc 222.
[0031] Next, referring to Figure 6, we will discuss the common techniques of drainage pipe fittings 100 and 400 that, while suppressing the increase in manufacturing costs due to the absence of bulging sections, etc., have sufficient flow deflection function and prevent clogging by objects (solids) that obstruct the flow of wastewater. The technical features will be explained in detail. Note that the following explanation will use the drainage pipe fitting 400 as a representative example.
[0032] As shown in Figure 6, the radius R of the notched arc 222 is preferably 15% to 200% of the inner diameter φd of the lateral branch pipe connection portion 120. Note that the radius R of the notched arc 222 is relative to the inner diameter φd of the lateral branch pipe connection part 120 (lateral branch pipe connection (Based on the inner diameter φd of part 120) Preferably 15% to 200%, and 19% to 19% A percentage of 5% or less is particularly preferable.
[0033] Furthermore, as shown in Figure 6, the maximum horizontal length L from the vertical axis to the notched arc 222 is preferably 3% to 40% of the inner diameter φd of the lateral branch pipe connection portion 120. Furthermore, the maximum horizontal length L from the vertical axis to the notched arc 222 is preferably 3% to 40% of the inner diameter φd of the lateral branch pipe connection 120 (referred to as the inner diameter φd of the lateral branch pipe connection 120), and particularly preferably 4.8% to 35%.
[0034] Furthermore, as shown in Figure 6, the center CC of the notched arc 222 is located below the inner diameter center C of the lateral branch pipe connection 120, within a range of 1% to 30% relative to the inner diameter φd. In other words, the center CC of the notched arc 222 is located below the inner diameter center C within a range of length DY of 1% to 30% relative to the inner diameter φd. Note that the center CC of the notched arc 222 is relative to the inner diameter φd of the lateral branch pipe connection part 120 (lateral branch pipe (Using the inner diameter φd of the connecting portion 120 as a reference) From the inner diameter center C, as described above, 1% to 30% or less It is preferable that it be located below the range, and particularly preferable that it be located below the range of 6% to 10%.
[0035] Furthermore, as shown in Figure 6, the center CC of the notched arc 222 is located laterally (on the opposite side of the flow deflection plate 200) from the inner diameter center C, within a range of 1% to 170% of the inner diameter φd of the lateral branch pipe connection 120. In other words, the center CC of the notched arc 222 is located laterally (on the opposite side of the flow deflection plate 200) from the inner diameter center C, within a range of length DX of 1% to 170% of the inner diameter φd.
[0036] Note that the center CC of the notched arc 222 is relative to the inner diameter φd of the lateral branch pipe connection part 120 (lateral branch pipe (Based on the inner diameter φd of the connection part 120) From the inner diameter center C, as described above, 1% to 170% or less It is preferable that it be located to the side of the range (opposite side of the drift plate 200), and particularly preferable that it be located to the side of the range of 3% to 20% (opposite side of the drift plate 200). Furthermore, the cross-sectional shape of the notched arc 222 shown in the cross-section of the deflection plate 200 in Figure 6(D) is rounded (R), and within the range LCD (the range from the inner diameter center C of the lateral branch pipe connection part 120 to the junction point of the notched arc 222 and the lower shutoff part 210D), the R gradually increases downward from the inner diameter center C of the lateral branch pipe connection part 120 (for example, gradually changing from R2 to R3).
[0037] As described above, the drainage pipe fittings 100, 400, and 500 according to this embodiment can prevent blockages caused by objects (solids) that obstruct the flow of drainage while maintaining sufficient flow deflection function, while suppressing increases in manufacturing costs due to the absence of bulging parts, etc. It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Industrial applicability]
[0038] The present invention is particularly preferable for drainage pipe fittings used in drainage piping for high-rise apartment buildings and the like, as it has sufficient flow deflection function while preventing blockage by objects (solids) that obstruct the flow of drainage. [Explanation of symbols]
[0039] 100, 400, 500 Drainage pipe fittings 112 Side opening 114 Top opening 116 Lower opening 120 Horizontal branch pipe connection 140 Upper pipe connection 160 Lower riser pipe connection 200 Current plate 210 Interruption section 220 Blockage prevention section 300 Backflow prevention ribs
Claims
1. A drainage pipe joint having a cylindrical body with a vertical axis, a side opening on the side of the body, a horizontal branch pipe connection part provided in the side opening, and an upper riser pipe connection part and a lower riser pipe connection part provided in the upper and lower openings of the body, The drainage pipe fitting is characterized in that the lateral branch pipe connection portion has a circular cross-section centered on the lateral axis of the lateral branch pipe connection portion, and the drainage pipe fitting includes a flow deflection plate configured to include a wall surface facing the lateral branch pipe so as to close a part of the left or right side of the circular cross-section in order to deflect the drainage flowing from the lateral branch pipe into the side opening to either the left or the right, the flow deflection plate has a plate shape and the corners of its end face are rounded, and the size of the rounding in the rounding is greater below the height corresponding to the center of the inner diameter of the lateral branch pipe connection portion.
2. The drainage pipe fitting according to Claim 1, characterized in that the size of the rounding in the rounding process gradually increases downward from the portion corresponding to the height of the center of the inner diameter of the lateral branch pipe connection portion.