JP2015168955A - Drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain pipe capable of preventing the inside of a drain flow passage from becoming a full water state, and to provide the drain pipe capable of securing a suitable drain flow rate by preventing a turbulent flow.SOLUTION: A drain pipe 1 comprises an inflow part 15 and a vertical pipe part 16. The inflow part 15 is also constituted of a straight line part 151 and a flat part 152. The flat part 152 is a fan shape in a side view, and an upstream side end part becomes a circular shape in a cross-sectional view, and a drain flow passage gradually extends upward and downward for advancing to the downstream side, and is deformed thereby in a flat shape from a cylindrical shape, and continues with the vertical pipe part 16. While, the flat part 151 is formed short up to an about half degree in a flow passage width in the horizontal direction by approaching one side surface of the drain flow passage to the other side surface. The flat part 152 also continues in the tangential direction with the vertical pipe part 16 in a plan view.

Description

  The present invention relates to a drainage pipe for discharging drainage downstream.

  Drainage generated in the tank body such as a bathtub, a sink, and a wash bowl is discharged to the downstream side through a drainage pipe.

In the drainage pipe, if the tank body and the downstream side are connected as they are, odors and pests from the sewage side pass through the drainage pipe and flow back indoors. Therefore, a drain trap having a mechanism for preventing odors and pests from flowing back from the sewage side is connected to the middle of the drain pipe.
The drain trap has a structure that forms a function (trap function) that prevents the odor and pests from flowing backward by storing drainage discharged from the tank inside and filling a part of the drainage channel with the drainage. ing. The stored wastewater is referred to as “sealed water”.

Here, when a large amount of drainage is generated from the tank body, the drainage flow path in the drainage pipe becomes full, drainage or air drawing phenomenon called siphon phenomenon occurs, and strong negative pressure is generated in the drainage pipe. is there.
At this time, even the above-mentioned sealed water may be drawn downstream by the negative pressure and flow out, and the trap function may be lost. In addition, it is called "breaking" that the sealing water is reduced by being drawn or the like and the trap function is lost. Also, when the siphon phenomenon occurs, air is drawn from the drainage outlet or overflow of the tank body, and an unpleasant noise “go” is generated.

  Therefore, in the drainage pipe described in Patent Document 1, it is possible to prevent the drainage pipe from becoming full by adjusting the drainage flow rate by reducing the diameter of a part of the drainage pipe by providing a throttle in the flow path. It is out. However, in the drainage pipe described in Patent Document 1, since a part of the drainage flow path is reduced in diameter, the leg cross-sectional area is reduced in the reduced diameter part, the drainage flow rate is poor, and dust and the like are easily clogged. .

  Some tank bodies such as bathtubs, sinks, and wash bowls have an overflow hole on the side surface. When the water level inside the tank body exceeds a certain level, drainage can be performed from the overflow hole. it can. The drainage discharged from the overflow hole passes through a drainage channel continuous from the overflow hole (hereinafter referred to as “overflow channel”) and merges with the drainage channel continuous from the drainage port of the tank body.

  Here, in the overflow channel, turbulent flow is likely to occur in the vicinity of the overflow hole or at the junction of the overflow channel and the drainage channel continuous from the drainage port, and the drainage flow rate is very poor. In addition, the inside of the overflow channel is difficult to clean and unsanitary.

  In the drainage pipe described in Patent Document 2, the overflow channel is eccentric and joined with the drainage channel continuous from the drainage port. With this structure, a swirling flow is generated at the confluence, reducing the turbulent flow of the drainage and improving the drainage flow rate in the overflow channel.

JP 2010-222890 A JP 2010-001676 A

  An object of the present invention is to provide a drain pipe that prevents the inside of the drain channel from becoming full, and to provide a drain pipe that can prevent turbulent flow and ensure a suitable drain flow rate.

The present invention as set forth in claim 1 for solving the above-mentioned problem, is a vertical pipe portion that extends in the vertical direction and lowers the flow path,
It consists of an inflow part that allows wastewater from the upstream to flow into the vertical pipe part,
The inflow part has a flat part formed so that the channel width in the vertical direction becomes long,
The inflow portion is connected to the outer surface of the vertical pipe portion, and is a drainage pipe characterized in that the drainage flowing through the flat portion is arranged in a positional relationship so as to flow along the inner periphery of the vertical pipe portion.

  The present invention according to claim 2 is the drainage pipe according to claim 1, wherein the flat portion is formed to have a short horizontal length.

  According to a third aspect of the present invention, in the drainage pipe according to the first or second aspect, the flat portion is gradually flattened toward the vertical pipe portion.

  According to a fourth aspect of the present invention, in the drainage pipe according to any one of the first to third aspects, the flat portion is continuous in a tangential direction with respect to the vertical pipe portion. is there.

  The present invention described in claim 5 is characterized in that the inflow portion includes a straight portion extending in the horizontal direction upstream of the flat portion. It is a drainage pipe.

In the present invention according to claim 6, the drain pipe is
The drainage pipe according to any one of claims 1 to 5, wherein the drainage pipe is provided on a downstream side of a drain trap that forms sealed water therein.

In the present invention according to claim 7, the drain pipe is
The drainage pipe according to any one of claims 1 to 5, wherein the drainage pipe is disposed in an overflow passage that extends from an overflow hole of the tank body to a pipe below the tank body.

According to the first aspect of the present invention, it is possible to prevent the drainage pipe from becoming full by generating a swirling flow in the vertical pipe portion. In addition, since the channel width in the top-and-bottom direction is long in the flat portion, it is possible to ensure a suitable drainage flow rate.
According to the second aspect of the present invention, since the drainage or the like is guided along the inner periphery of the vertical pipe portion in the flat portion, it becomes possible to generate a swirl flow more strongly.
According to this invention of Claim 3, it can prevent that a turbulent flow arises in a flat part.
According to this invention of Claim 4, it can prevent that a turbulent flow arises when waste_water | drain etc. flow in in a vertical pipe part.
According to the fifth aspect of the present invention, since the flow of the drainage and the like is changed in the horizontal direction in the straight portion, the drainage and the like can be caused to flow into the vertical pipe portion at an appropriate angle.
According to the sixth aspect of the present invention, it is possible to reduce the noise associated with the breakage of the drain trap and the siphon phenomenon due to the drain pipe being filled with water.
According to this invention of Claim 7, while being able to improve the waste_water | drain flow volume in an overflow flow path, the self-cleaning property in an overflow flow path can be improved.

It is sectional drawing which shows the construction state of the drain piping of this invention. It is sectional drawing which shows the inflow part vicinity. It is AA 'sectional drawing of FIG. It is (a) sectional drawing which shows flows, such as drainage, in the inflow part neighborhood, (b) A-A 'sectional view of (a). (A) It is sectional drawing which shows 2nd embodiment. (B) It is sectional drawing which shows 3rd embodiment. (A) sectional drawing which shows 4th embodiment, (b) It is A-A 'sectional drawing of (a). It is sectional drawing which shows 5th embodiment. (A) sectional drawing which shows 6th embodiment, (b) It is A-A 'sectional drawing of (a).

  Hereinafter, the drainage pipe 1 of the present invention will be described with reference to the drawings. The following description is for facilitating understanding of the embodiment, and the present invention is not limited and understood by this. In the following embodiments, the upper, lower, left and right directions will be described with reference to the state shown in FIG.

  As shown in FIG. 1, the drainage pipe 1 of the present embodiment is arranged on the downstream side of the tank body 2, and drainage and dust (hereinafter referred to as “drainage”) generated inside the tank body 2 are downstream (sewage). To the side).

  The tank body 2 is a wash bowl, which is a facility device in which drainage or the like is generated when used, and has a drain opening 2 at the bottom and an overflow hole 5 at the side.

  The drain port 2 is inserted with a substantially cylindrical drain port main body 4 having a flange at the top, and is screwed with a nut via a packing and an overflow adapter 9 to sandwich the periphery of the drain port 2. . The lower end of the drain port body 4 is inserted into the drain trap 10 and is attached by packing and nuts. Further, the drain outlet body 4 is partially cut off at the height where the overflow adapter 9 is disposed.

  A substantially cylindrical overflow body 6 having a flange at one end (left side in FIG. 1) is inserted into the overflow hole 5, and is screwed into the overflow elbow 7 via a packing to sandwich the periphery of the overflow hole 5. doing. The overflow elbow 7 is substantially L-shaped in cross section and is connected to the overflow adapter 9 via a flexible tube 8. The overflow adapter 9 has a substantially cylindrical shape, and has a branch pipe portion connected to the flexible pipe 8, and joins the drainage discharged from the overflow hole 5 to the drainage channel inside the drainage outlet body 4. Can do.

  That is, the tank body 2 has a drain port channel continuous from the drain port 2 and an overflow channel continuous from the overflow hole 5, and the two channels merge with each other inside the drain port body 4. ing.

  The drain trap 10 includes a descending part 11, a first bent part 12, an ascending part 13, a second bent part 14, an inflow part 15, and a vertical pipe part 16. Further, the drain trap 10 is a substantially S-shaped drain trap formed by bending the pipe body, and has the effect of preventing invasion of odors and pests from the downstream side by forming a sealed water inside. Have.

  The descending portion 11 is a drainage flow path formed by lowering the pipe body toward the downstream side, which is the most upstream side of the drainage trap 10. In addition, the upper end part of the descending part 11 has an enlarged diameter, and the inner surface of the drain port body 4 and the inner surface of the descending part 11 are flush with each other when the drain port body 4 is inserted. . The descending portion 11 is continuous with the ascending portion 13 by bending the drainage flow path by about 180 ° at the first bent portion 12 formed at the lower end thereof.

  The ascending portion 13 is a drainage channel formed by raising the pipe body from the upstream side to the downstream side of the drainage channel, and the pipe body is about 90 at the second bent portion 14 formed at the upper end thereof. ° The drainage channel is bent and is continuous with the inflow portion 15.

The inflow portion 15 includes a straight portion 151 and a flat portion 152. As shown in FIG. 2, the straight portion 151 is a cylindrical straight pipe portion that extends substantially horizontally, and forms a drainage flow path that connects the second bent portion 14 and the flat portion 152.
The flat portion 152 has a fan-like shape when viewed from the side, and the upstream end has a circular shape when viewed from the cross section, and the drainage flow path gradually extends upward and downward as it progresses downstream, so that the shape changes from a cylindrical shape to a flat shape. And is continuous with the longitudinal tube portion 16. As shown in FIGS. 2 and 3, the flat portion 152 is formed to be approximately 2.5 times longer in the vertical direction than the upstream end portion of the flat portion 152 at the connecting portion with the vertical tube portion 16. In addition, the horizontal channel width is shortened to about half so that one side surface of the drainage channel approaches the other side surface. Further, in plan view, the flat portion 152 is continuous in the tangential direction with respect to the vertical tube portion 16.

  The vertical pipe portion 16 has a cylindrical shape extending in a substantially vertical direction, is connected to a downstream pipe (not shown), and discharges the waste water flowing in from the inflow portion 15 further downstream. In addition, the cross-sectional shape (inner diameter) of the flow path of the portion other than the flat portion 152, the portion from the descending portion 11 to the first bent portion 12, the ascending portion 13, the second bent portion 14, and the straight portion 151, and the vertical pipe portion 16. (Shape) forms a perfect circle shape having substantially the same diameter.

  The drainage pipe 1 discharges drainage and the like by the following flow. In addition, in FIG. 4, the flow of waste water etc. is shown using the arrow.

  When drainage or the like generated by using the tank body 2 is discharged from the drainage port 2, the drainage or the like first passes through the drainage port body 4 from the drainage port 2 and is discharged into the drainage trap 10. Next, the waste water or the like that has flowed into the drain trap 10 flows into the inflow portion 15 through the down portion 11, the first bent portion 12, the up portion 13, and the second bent portion 14.

  The drainage or the like that has flowed into the inflow portion 15 from the second bent portion 14 passes through the straight portion 151 of the inflow portion 15 and flows into the flat portion 152 after changing the flow in the horizontal direction. Then, as shown in FIG. 4 (b), the drainage and the like flowing in from the straight portion 151 is guided to one side surface in the flat portion 152 and flows into the vertical pipe portion 16. At this time, since the flat part 152 is continuous in the tangential direction with respect to the vertical pipe part 16 in a state where the flow path in the horizontal direction is about half, all drainage and the like flowing in from the flat part 152 are vertical pipes. It flows along the inner surface of the part 16 and becomes a powerful swirl flow. Then, the swirl flow (drainage or the like) flowing in the vertical pipe portion 16 is discharged to a drainage pipe further downstream of the vertical pipe portion 16.

In the flow of the drainage and the like, the flow of the drainage and the like is changed in the horizontal direction by the straight portion 151, so that the drainage and the like can be introduced into the vertical pipe portion 16 at an appropriate angle. Then, as drainage or the like flows as a swirl flow in the vertical pipe portion 16, an air layer A extending in the axial direction is formed inside the vertical pipe portion 16, as indicated by a broken line in FIG. Therefore, the drainage flow path in the vertical pipe portion 16 is not filled with water, and siphon phenomenon can be prevented from occurring. That is, it becomes possible to prevent noise and breakage associated with the drawing of the sealing water. Moreover, since drainage etc. flow along the inner periphery of the vertical pipe part 16, it can prevent that dirt accumulates on the inner surface of the vertical pipe part 16, and is hygienic.
In addition, although the drainage flow path in the horizontal direction is gradually shortened in the flat part 152, since the drainage flow path in the vertical direction is gradually formed, it is possible to secure a sufficient leg cross-sectional area in the flat part. .
Further, in the drainage pipe 1 of the present invention, since the drainage pipe 1 includes the flat portion 152, a swirl flow can be generated in the vertical pipe portion 16 without decentering the drainage flow path. Therefore, the space below the tank body 2 can be widely used.

  The flow when drainage or the like is discharged from the drain port 2 is as described above. However, when drainage or the like is discharged from the overflow hole 5, the branch is passed through the overflow body 6, the overflow elbow 7, and the flexible tube 8. Drainage or the like flows into the overflow adapter 9 from the pipe portion. Then, drainage or the like inside the overflow adapter 9 flows into the drain port body 4 from the cutout of the drain port body 4. The flow of the drainage after the drainage port body 4 is the same as the flow of the drainage from the drainage port 2 described above, and is therefore omitted.

The drainage pipe 1 according to the first embodiment of the present invention is as described above, but the present invention is not limited to the structure of the above embodiment, and various design changes can be made without departing from the scope of the invention. .
For example, in the first embodiment of the present invention, the flat portion 152 is deformed from a cylindrical shape to a flat shape as the drainage flow path gradually extends upward and downward as it goes downstream, but is shown in FIG. Thus, the drainage channel may extend only upward, or conversely, it may have a flat shape by extending only downward.

  In the first embodiment, the flat portion 152 is deformed so that the horizontal flow path width gradually decreases. However, as shown in FIG. 6, the horizontal flow is improved by bending the drain flow path. It is good also as a structure which continues with the vertical pipe part 16, maintaining a road width. In this case, since the horizontal flow path width does not change, dust or the like is hardly clogged. In addition, since the flow path width of the flat portion 152 is gradually deformed in the vertical direction, a suitable drainage flow rate can be ensured.

  Moreover, in the said embodiment, although the inflow part 15 and the vertical pipe part 16 which have the linear part 151 and the flat part 152 were arrange | positioned in the location of the downstream of a drain trap, in the embodiment which is the upstream of a drain trap, etc. You may arrange | position in the location other than showing. For example, as shown in FIG. 7, the overflow elbow 7 may be provided with an inflow portion 15 having a straight portion 151 and a flat portion 152 and a vertical pipe portion 16, and as shown in FIG. An inflow portion 15 having a flat portion 152 and a vertical tube portion 16 may be provided. In this case, it becomes possible to reduce the turbulent flow generated in the overflow channel, and the drainage flow rate is improved. Further, since the drainage or the like is discharged as a swirling flow, dirt is hardly accumulated on the inner side surface of the pipe.

  Further, the drainage pipe of the present invention is not disposed only on the downstream side of the wash bowl, but may be disposed on the downstream side of the tank body such as a sink or a bathtub.

DESCRIPTION OF SYMBOLS 1 Drain piping 2 Tank body 3 Drain outlet 4 Drain outlet main body 5 Overflow hole 6 Overflow main body 7 Overflow elbow 8 Flexible pipe 9 Overflow adapter 10 Drain trap 11 Down part 12 First bent part 13 Up part 14 Second bent part 15 Inflow Part 151 straight part 152 flat part 16 vertical pipe part A air layer

Claims (7)

A vertical pipe that extends in the vertical direction and descends the flow path;
It consists of an inflow part that allows wastewater from the upstream to flow into the vertical pipe part,
The inflow part has a flat part formed so that the channel width in the vertical direction becomes long,
A drainage pipe characterized in that the inflow part is connected to the outer surface of the vertical pipe part, and the drainage flowing through the flat part is arranged in a positional relationship so as to flow along the inner periphery of the vertical pipe part. The drainage pipe according to claim 1, wherein the flat portion is formed to have a short horizontal length. The drainage pipe according to claim 1 or 2, wherein the flat portion is gradually flattened toward the vertical pipe portion. The drainage pipe according to any one of claims 1 to 3, wherein the flat portion is continuous in a tangential direction with respect to the vertical pipe portion. The drain pipe according to any one of claims 1 to 4, wherein the inflow portion includes a straight portion extending in a horizontal direction upstream of the flat portion. The drainage pipe is
The drainage pipe according to any one of claims 1 to 5, wherein the drainage pipe is provided on a downstream side of a drain trap that forms sealed water therein. The drainage pipe is
The drainage pipe according to any one of claims 1 to 5, wherein the drainage pipe is disposed in an overflow passage that extends from an overflow hole of the tank body to a pipe below the tank body.

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