JP2022070710A - Piping structure - Google Patents

Abstract

To provide a drainage structure in which a dishwasher is connected to other water section equipment, that can reduce momentum of drainage from the dishwasher and suppress breakage of sealed water in a drain trap corresponding to water section equipment.SOLUTION: Piping structure 10 comprises: a first drainage system 1 that drains the drainage from a kitchen sink 16 (water supply equipment); a second drainage system 2 that drains the drainage from the dishwasher 18 installed separately from the kitchen sink 16 and joins the first drainage system 1; and a meandering part 14 that is provided in a linear portion of the second drainage system 2 and formed by meandering a pipeline.SELECTED DRAWING: Figure 1

Description

The present invention relates to a piping structure.

A siphon drainage structure in which a kitchen sink and a dishwasher are connected is disclosed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-196744

However, in the case of a dishwasher with a large drainage pressure, there is a concern that the amount of drainage that flows back to the other water-related equipment will increase, causing the drainage trap corresponding to the water-related equipment to break the sealed water. Will be done.

An object of the present invention is to reduce the momentum of drainage from a dishwasher.

The piping structure according to the first aspect is a first drainage system for flowing drainage from the water supply equipment and a first drainage system for drainage from a dishwasher installed separately from the water supply equipment. It has a second drainage system that merges, and a meandering portion that is provided in a linear portion of the second drainage system and is formed by meandering a pipeline.

In this piping structure, a meandering portion formed by meandering the pipeline is provided in the linear portion of the second drainage system through which the drainage from the dishwasher flows, so that the drainage passes through the meandering portion. The flow is disturbed and pressure loss occurs. Therefore, even in a dishwasher of a type having a large drainage pressure, the momentum of drainage from the dishwasher can be reduced.

Further, the second drainage system joins the first drainage system for draining drainage from a water supply device different from the dishwasher. As described above, since the momentum of the drainage is reduced at the meandering portion of the second drainage system, the backflow of the drainage to the first drainage system side (water circulation equipment side) is reduced. Therefore, the breakage of the sealed water in the drain trap corresponding to the water-related equipment is suppressed.

The second aspect is that in the piping structure according to the first aspect, the meandering portion has a concave shape having a concave shape toward the center of the pipeline and a convex shape toward the center of the pipeline. The convex portion is formed, and the maximum value of the thickness of the pipe wall in the convex portion is larger than the maximum value of the thickness of the pipe wall in the concave portion.

In this piping structure, a convex portion and a concave portion are formed in the meandering portion. The drainage flowing through the meandering part flows while hitting the convex part relatively strongly. The drainage of the dishwasher may contain foreign substances due to abrasives, cracks in dishes, etc., but the maximum value of the pipe wall in the convex part is larger than the maximum value of the pipe wall in the concave part. Because it is also large, the durability of the piping against abrasives and foreign matter is high. Further, since the drainage flows while swirling in the concave portion, dirt is easily sent out from the concave portion. Therefore, it is difficult for foreign matter to adhere to the meandering portion.

The third aspect is the piping structure according to the second aspect, wherein the convex portion and the concave portion are alternately formed in the longitudinal direction of the meandering portion, and the convex portion and the convex portion are formed in the radial direction of the meandering portion. The recesses face each other.

In this piping structure, convex portions and concave portions are alternately formed in the longitudinal direction of the meandering portion, so that the momentum of drainage can be efficiently reduced. Further, since the convex portion and the concave portion face each other in the radial direction of the meandering portion, the change in the cross-sectional area of the pipeline is different from the case where the convex portions and the concave portions face each other in the radial direction. few. Therefore, it is possible to efficiently drain the wastewater while efficiently reducing the momentum of the wastewater.

A fourth aspect is that in the piping structure according to the second aspect or the third aspect, in the radial cross section of the meandering portion, the contour of the convex portion on the inner surface of the pipeline is an arc shape, and the pipe is formed. The contour of the recess on the inner surface of the road is elliptical.

In this piping structure, the contour of the recess is elliptical. Here, it is assumed that the concave portion has an arc shape having the same center as the ellipse and having the same radius as the semi-minor axis radius of the ellipse. Then, the amount of the recess from the center of the ellipse (circle) is larger in the elliptical shape than in the arc shape. Therefore, the drainage flowing through the meandering portion easily enters the recess, and the drainage can cause a large pressure loss.

Further, since the drainage tends to swirl in the concave portion, it becomes more difficult for foreign matter to adhere to the meandering portion.

A fifth aspect is the piping structure according to any one of the first to fourth aspects, wherein the first drainage system and the second drainage system are connected to a siphon drainage pipe.

In this piping structure, the first drainage system and the second drainage system are connected to the siphon drainage pipe. The siphon drainage pipe has a smaller diameter than the gradient drainage pipe due to the generation of siphon force, but since the second drainage system has a meandering part, the drainage from the dishwasher is the first drainage. Backflow to the system side (water supply equipment side) is reduced.

The sixth aspect is the piping structure according to any one of the first to fifth aspects, so that the plurality of the meandering portions can be seen as straight tubulars in the front view in the second drainage system. Of the meandering portions that are vertically adjacent to each other at different heights, the downstream end of the meandering portion located on the upper side and the upstream end of the meandering portion located on the lower side are connected by a U-shaped portion. Has been done.

In this piping structure, a plurality of meandering portions are provided at different height positions and are connected in series by U-shaped portions, so that the length of each meandering portion is suppressed and the length of the entire meandering portion is pipelined. Can be lengthened. As a result, the momentum of drainage from the dishwasher can be efficiently suppressed.

According to the present invention, the momentum of drainage from the dishwasher can be reduced.

It is a front view which shows the outline of the siphon drainage system which has the piping structure which concerns on this embodiment. It is a perspective view which shows the meandering part. It is sectional drawing which shows the state which the meandering part was cut in the horizontal plane.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The components shown with the same reference numerals in each drawing mean that they are the same or similar components. In addition, duplicate description and reference numeral in the embodiment described below may be omitted. Further, the "upstream side" means the upstream side in the drainage direction, and the "upstream end" means the end portion on the upstream side in the drainage direction. The "downstream side" means the downstream side in the drainage direction, and the "downstream end" means the end portion on the downstream side in the drainage direction.

In FIG. 1, the piping structure 10 according to the present embodiment is used, for example, in the siphon drainage system 12. The piping structure 10 has a first drainage system 1, a second drainage system 2, and a meandering portion 14.

As shown in FIG. 1, floor panels 22 are arranged at intervals on the floor slab 20 of the dwelling unit, and on the floor panel 22, a kitchen sink 16 as an example of water-related equipment, And the dishwasher 18 is arranged.

The first drainage system 1 has a piping structure for draining drainage from the kitchen sink 16, and corresponds to a portion from the kitchen drain 16 to the siphon drainage pipe 32 described later. For example, a disposer 24 is attached to the drain port 16A of the kitchen sink 16. A pipe 26, a water-sealed drain trap 28, and a pipe 30 are connected to the downstream side of the disposer 24.

A siphon drainage pipe 32 is arranged on the downstream side of the pipe 30. The siphon drainage pipe 32 includes a horizontal pull pipe 32A and a vertical pipe 32B. The inner diameter of the siphon drainage pipe 32 is, for example, the same as the inner diameter of the pipe 30. The horizontal pull pipe 32A is arranged on the floor slab 20. The vertical pipe 32B of the siphon drainage pipe 32 hangs down through a vertical hole 34 formed in the floor slab 20 and is connected to a drainage stand pipe (not shown) extending in the vertical direction of the dwelling unit.

As an example, a pressure relaxation device 36 and a vent valve 38 are provided on the upstream side of the sealed water in the drain trap 28. In the pressure relaxation device 36, when the drainage is instantaneously discharged from the dishwasher 18 and the positive pressure in the pipe 30 is momentarily increased, the pressure in the pipe 30 becomes positive and the air in the pipe 30 becomes the positive pressure in the drain trap 28. Although it tries to flow back inside, the pressure relaxation device 36 buffers the positive pressure, so that the sealing of the sealed water (here, the breaking due to the backflow of air) is suppressed.

The vent valve 38 takes in outside air when the downstream side becomes negative pressure, and suppresses the phenomenon that the drain trap 28 is broken, specifically, the stored sealed water is sucked to the downstream side by the negative pressure and disappears. can do. Further, the ventilation valve 38 is for closing the valve in normal times to prevent leakage of bad odors and the like. As the vent valve 38, a known one (as an example, the one described in Japanese Patent Application Laid-Open No. 2009-299866) can be used. The "negative pressure" means that the pressure is lower than the outside air in the environment in which the piping structure 10 is arranged.

The second drainage system 2 is a pipe that drains drainage from the dishwasher 18 installed separately from the kitchen sink 16 and joins the first drainage system 1, and is a siphon drainage pipe described later from the dishwasher 18. It corresponds to the part until it joins 32. The second drainage system 2 joins the first drainage system 1 in the horizontal pull pipe 32A. As described above, the second drainage system 2 may not directly join the first drainage system 1 but may join at a position downstream of the first drainage system 1.

A pipe 40 extending downward is connected to the drainage portion of the dishwasher 18. An elbow pipe 44 is connected to the downstream end of the pipe 40 via a pipe joint 42. A plurality of meandering portions 14, for example, three meandering portions 14 are provided in series on the downstream side of the elbow pipe 44. The meandering portion 14 is provided in a linear portion of the second drainage system 2, and each of the pipelines 14A is formed by meandering.

As shown in FIG. 1, the plurality of meandering portions 14 are provided at different height positions so that they can be seen as straight tubes when viewed from the front. Specifically, the three meandering portions 14 are configured to have the same length, and are arranged vertically separated from each other so that the longitudinal direction is the horizontal direction. Further, among the meandering portions 14 adjacent to each other on the upper and lower sides, the downstream end of the meandering portion 14 located on the upper side and the upstream end of the meandering portion 14 located on the lower side are connected by the U-shaped portion 46. As a result, the three meandering portions 14 are arranged in series while meandering in the vertical plane as a whole.

The meandering portion 14 on the most downstream side is connected to the pipe 50 via the pipe joint 48. The pipe 50 extends downward via, for example, a rising portion 52 extending to the vicinity of the lower end of the drain trap 28, and is connected to the horizontal pull pipe 32A.

As shown in FIG. 2, the appearance of the meandering portion 14 is configured to look like a straight tube when viewed from the front view from the direction of arrow A, but to look like a meandering shape when viewed from a plan view from the direction of arrow B, for example. Further, as shown in FIG. 3, the meandering portion 14 includes a concave portion 14B having a concave shape toward the center of the pipeline 14A and a convex portion 14C having a convex shape toward the center of the pipeline 14A. Is formed. The center of the pipeline 14A is the center in the cross section at each position in the longitudinal direction, and roughly corresponds to the line L in FIG.

The convex portions 14C and the concave portions 14B may be formed alternately in the longitudinal direction of the meandering portion 14, for example, about 12 sets. Further, the convex portion 14C and the concave portion 14B may face each other in the radial direction of the meandering portion 14. Further, the maximum value t1 of the pipe wall thickness in the convex portion 14C may be larger than the maximum value t2 of the pipe wall thickness in the concave portion 14B. Further, in the radial cross section of the meandering portion 14, the contour of the convex portion 14C on the inner surface of the pipeline 14A may be arcuate, and the contour of the concave portion 14B on the inner surface of the conduit 14A may be elliptical. The radial cross section is a cross section at a position where the conduit 14A meanders the most, that is, the amplitude of the meander is the largest, and in the present embodiment, as shown in FIG. 3, a cross section when cut in a horizontal plane. Is.

(Action)
This embodiment is configured as described above, and its operation will be described below. In FIG. 1, in the piping structure 10 according to the present embodiment, a meandering portion 14 formed by meandering the pipeline 14A is provided in a linear portion of a second drainage system 2 through which drainage from the dishwasher 18 flows. Has been done. The flow is disturbed while the drainage passes through the meandering portion 14, resulting in pressure loss. The drainage meanders like a line L. Therefore, even in the type of dishwasher 18 having a large drainage pressure, the momentum of drainage from the dishwasher 18 can be reduced.

Further, the second drainage system 2 joins the first drainage system 1 for draining the drainage from the kitchen sink 16 which is different from the dishwasher 18. Since the momentum of the drainage is reduced at the meandering portion 14 of the second drainage system 2 as described above, the backflow of the drainage to the first drainage system 1 side (kitchen sink 16 side) is reduced. Therefore, the breakage of the sealed water in the drain trap 28 corresponding to the kitchen sink 16 is also suppressed.

As shown in FIG. 3, when the convex portion 14C and the concave portion 14B are formed in the meandering portion 14, the drainage flowing through the meandering portion 14 flows while relatively strongly hitting the convex portion 14C. The drainage of the dishwasher 18 may contain foreign substances due to abrasives, tableware cracks, etc., but the maximum value t1 of the pipe wall thickness in the convex portion 14C is the pipe wall thickness in the concave portion 14B. Since it is larger than the maximum value t2 of, the durability of the pipe against abrasives and foreign matters is high. Further, since the drainage flows while winding the vortex 54 in the recess 14B, dirt is easily sent out from the recess 14B. Therefore, it is difficult for foreign matter to adhere to the meandering portion 14.

Further, when the convex portions 14C and the concave portions 14B are alternately formed in the longitudinal direction of the meandering portion 14, the momentum of drainage can be efficiently reduced. When the convex portion 14C and the concave portion 14B face each other in the radial direction of the meandering portion 14, the pipe line 14A is cut off as compared with the case where the convex portions 14C and the concave portions 14B face each other in the radial direction. There is little change in area. Further, the three meandering portions 14 are arranged in series while meandering in the vertical plane as a whole. Therefore, it is possible to efficiently drain the wastewater while efficiently reducing the momentum of the wastewater.

The contour of the recess 14B may be elliptical. Here, it is assumed that the recess 14B has an arc shape having the same center as the ellipse and the same radius as the semi-minor axis radius of the ellipse, as shown by the line C in FIG. Then, the amount of the recess 14B recessed from the center of the ellipse (circle) is larger in the elliptical shape than in the arc shape (line C). Therefore, the drainage flowing through the meandering portion 14 easily enters the recess 14B deeply, and the drainage can cause a large pressure loss.

Further, the drainage easily winds the vortex 54 in the recess 14B, and foreign matter is easily washed away. Therefore, it becomes more difficult for foreign matter to adhere to the meandering portion 14.

As shown in FIG. 1, in the present embodiment, as an example, the first drainage system 1 and the second drainage system 2 are connected to the siphon drainage pipe 32. The siphon drainage pipe 32 has a smaller diameter than the gradient drainage pipe (not shown) due to the generation of siphon force, but since the second drainage system 2 has a meandering portion 14, it is a dishwasher. It is reduced that the drainage from 18 flows back to the first drainage system 1 side (kitchen sink 16 side).

Further, in FIG. 1, since a plurality of meandering portions 14 are provided at different height positions and are connected in series by a U-shaped portion 46, the entire meandering portion 14 is suppressed while suppressing the length of each meandering portion 14. The length of the pipeline can be lengthened. As a result, the momentum of the drainage from the dishwasher 18 can be efficiently suppressed.

Further, since the plurality of meandering portions 14 are arranged so as to look like straight tubes in the front view, the meandering portions 14 adjacent to each other are vertically adjacent to each other as compared with the case where the appearance of the meandering portions 14 is meandering in the front view. The distance between them can be shortened. As a result, the installation space of the meandering portion 14 can be reduced.

As described above, according to the present embodiment, the momentum of the drainage from the dishwasher 18 can be reduced.

[Other embodiments]
Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and can be variously modified and implemented without departing from the gist thereof. Of course there is.

In the above embodiment, the piping structure 10 is used for the siphon drainage system 12, but the piping structure 10 can also be used for a normal drainage system having a gradient pipe.

In FIG. 2, the appearance of the meandering portion 14 looks like a straight cylinder when viewed from the front view from the arrow A direction, and looks like a meandering shape when viewed from the arrow B direction, but is not limited to this, and all in the radial direction. It may be configured in a cylindrical shape that looks like a straight tube when viewed from the direction of.

1 1st drainage system, 2nd drainage system, 10 piping structure, 12 siphon drainage system, 14 meandering part, 14A pipeline, 14B concave part, 14C convex part, 16 kitchen sink (water supply equipment), 18 dishwashing Machine, 32 siphon drainage pipe, 46 U-shaped part, t1 maximum value of the pipe wall of the convex part, t2 maximum value of the pipe wall of the concave part

Claims (6)

The first drainage system that drains the drainage from the water supply equipment,
A second drainage system that drains drainage from a dishwasher installed separately from the water-related equipment and joins the first drainage system,
A meandering portion provided in a linear portion of the second drainage system and formed by meandering a pipeline, and a meandering portion.
Plumbing structure with. In the meandering portion, a concave portion having a concave shape toward the center of the pipeline and a convex portion having a convex shape toward the center of the pipeline are formed.
The piping structure according to claim 1, wherein the maximum value of the pipe wall thickness in the convex portion is larger than the maximum value of the pipe wall thickness in the concave portion. In the longitudinal direction of the meandering portion, the convex portion and the concave portion are alternately formed.
The piping structure according to claim 2, wherein the convex portion and the concave portion face each other in the radial direction of the meandering portion. In the radial cross section of the meandering portion,
The contour of the convex portion on the inner surface of the pipeline is arcuate.
The piping structure according to claim 2 or 3, wherein the contour of the concave portion on the inner surface of the pipeline has an elliptical shape. The piping structure according to any one of claims 1 to 4, wherein the first drainage system and the second drainage system are connected to a siphon drainage pipe. In the second drainage system, the plurality of the meandering portions are provided at different height positions so that they can be seen as straight tubes when viewed from the front.
Claims 1 to 5 in which the downstream end of the meandering portion located on the upper side and the upstream end of the meandering portion located on the lower side of the meandering portions adjacent to each other are connected by a U-shaped portion. The piping structure according to any one item.

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