JP2002220862A - Joint for offsetting riser drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thoroughly prevent the disadvantage such as blow-off of water sealed in a trap by improving an offset joint in the case of offset piping a drainage riser of a building. SOLUTION: This joint is used for offsetting the riser in drain piping of a building. A drainage outflow side connecting part 2 to which a lower side vertical pipe A is connected is provided at the lower end of the joint main body 1 having the upper end closed, and a drainage inflow side connecting part 3 to which an upper side horizontal or obliquely upward pipe B is connected is provided at the side of the joint main body 1 through a guide passage 4 for making inflow drainage into a swirl flow along the inner periphery of the joint main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage stack offset coupling used for offsetting a stack in a building drainage pipe.

[0002]

2. Description of the Related Art In an ordinary apartment house, as shown in FIG. 5, sanitary fixtures and the like of each dwelling unit are connected to a straight drain stack P via a trap t via a drain branch pipe b.

[0003]

However, when the size of the dwelling units and the room layout are different between the upper floor of the building and the lower floor of the building, the drainage stack is required to extend from the upper floor of the building to the lower floor of the building. It is not possible to pipe straight, and it is necessary to shift the drainage stack on the middle floor of the building as shown in FIG. 6, that is, to perform offset piping. Thus, in such an offset pipe, when the offset portion S is partially filled with water, and a large amount of drainage flows from a certain branch pipe above the offset portion S, for example, bm, bm + 1,. There is a fear that the air in the standing pipe portion Y below the branch pipe bm is compressed, and the trapped water such as sanitary fittings connected to the branch pipes bm-1,.

Therefore, it is known to provide a ventilation pipe in order to release the air in the above-mentioned air compression and prevent the trap water from being blown out. However, it is necessary to separately provide an opening in the slab. Man-hours, piping members, and the like also increase, and an increase in cost is inevitable.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to sufficiently prevent inconveniences such as blowing out trapped water simply by improving an offset joint when a building drainage stack is offset.

[0006]

SUMMARY OF THE INVENTION A drainage stack offset fitting according to the present invention is a fitting used for offsetting a stackpipe in a building drainage pipe, and a drainage outflow side connection to which a lower vertical pipe is connected. A drainage portion is provided at the lower end of the joint body with the upper end closed, and a drainage inflow side connection portion to which an upper horizontal or obliquely upward pipe is connected is a guide for turning inflow drainage into a swirling flow along the inner periphery of the joint body. It is a configuration characterized by being provided on the side surface of the above-mentioned joint main body via a path, providing a cleaning port in the joint main body, a drainage outflow side connection part and a drainage inflow side connection part with a flange connection structure. Or, the drainage outflow side connection part is the flange connection structure,
The drainage inflow side connection portion may have a plug-in connection structure.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a side view showing an embodiment of the drainage stack offset coupling according to the present invention, and FIG. 1B is a plan view of the same. In FIG. 1, A denotes a vertical pipe below the drainage stack, B denotes an upper horizontal or diagonally upward pipe, and the horizontal or diagonally upward pipe denotes an upper vertical pipe at a predetermined offset distance. Connected by a normal bend joint to
In FIG. 1, illustration is omitted. C shows an embodiment of the drainage stack offset coupling according to the present invention. Reference numeral 1 denotes a joint body having a closed upper end, and reference numeral 2 denotes a drainage / outflow-side connection portion to which the lower vertical pipe A is connected. In the illustrated embodiment, as shown in FIG. 2, a socket 22 with a flange 21 is integrally formed at the lower end of the joint body 1, and the flange 22 and the packing holding plate 23 are formed.
And the packing 24 is inserted between them. The lower vertical pipe A is inserted, and the packing 24 is compressed by tightening the packing holding plate 23 with the bolt 25.

In FIG. 1, reference numeral 3 denotes a drainage inflow side connection part to which an upper horizontal or obliquely upward pipe B is connected.
The inflow / drainage is provided on a side surface of the joint body 1 via a guide path 4 for turning the inflow and drainage into a swirling flow along the inner periphery of the joint body. The guide path 4 generates a swirling flow in the same manner as the cyclone, and the center axis of the guide path 4 does not intersect with the center axis of the joint body 1, and the diameter of the passage section of the guide path 4 is the diameter of the joint body 1. The outermost surface of the guide path 4 is tangentially intersected with the outer surface of the column of the joint body 1.

[0009] The drainage inflow side connection portion 3 may be a one-touch type insertion connection structure. For example,
As shown in FIG. 3, a lip packing 34 with a flange 33 is attached to a socket 32 with a flange 31, a packing press plate 36 with a flange 35 is abutted, and these are fastened with bolts 37. Can,
An upper horizontal or obliquely upward pipe is inserted and sealed by the self-sealing action of the lip packing 34.

[0010] In the above, the drainage inflow side connection portion can also have a flange connection structure like the drainage outflow side connection portion. An openable and closable opening used as a cleaning port can be provided on the upper surface of the joint body. The connection part for drainage outflow side of the above-mentioned joint may be a usual straight pipe. The drainage stack offset coupling according to the present invention can be manufactured by injection molding or blow molding of a synthetic resin, for example, vinyl chloride resin.

FIG. 4A is a side view of a connection portion between the upper horizontal or obliquely upward pipe B and the lower vertical pipe A by the joint C of the present invention, and FIG. (A) is a cross-sectional view of the roller. This connection is
This corresponds to the connection part X in FIG.

In FIG. 6, the inner diameter of a horizontal or obliquely upward pipe B is a branch pipe b1,.
Even if it is set not to be full even under the maximum displacement from bm, bm + 1..., conventionally, the connection portion X may be full. If the drainage flow rate from the upper branch pipes bm, bm + 1 ... becomes large, the air in the drainage stack section Y below the branch pipe bm is compressed, and the trap sealing of the branch pipes bm-1, ... b1 is performed. Water blowing occurs. Further, when the connection portion X is full, a certain branch pipe below the offset portion S, for example, bn
If a large amount of drainage flows down from the drain, the drainage stack portion between the branch pipe and the offset portion S is depressurized, and trapping water of the branch pipes bn + 1 and bn + 2 is generated. I do.

However, in the connection part by the joint of the present invention, in FIG. 4, the inflow / drainage water W from the horizontal or obliquely upward pipe B is swung along the inner periphery of the joint body 1 for the guide path 4 and the centrifugal force is generated. Therefore, it is possible to prevent the inside of the joint body 1 from being filled with the cavity inside the hollow body, and it is possible to sufficiently prevent the trap water from being blown out and sucked.

In order to hollow the joint body, it is effective to increase the swirling velocity and increase the centrifugal force, and it is more advantageous to increase the inclination angle of the obliquely upward pipe. is there. Therefore, the angle between the central axis of the receptacle of the drainage outflow side connection part and the central axis of the receptacle of the drainage inflow side connection part was set to 5 °, 10 °, 30 °, 45 °, 90 °. It is preferable to prepare joints and select them appropriately according to the piping space.

[0015]

According to the drainage stack offset coupling of the present invention, even if the drainage stack is offset, the lower vertical pipe and the upper horizontal or obliquely upward pipe are connected to each other. Can be held in a hollow state by the swirling flow of the inflow / drainage water, so that trapping water can be prevented from being blown out of the branch pipe above the offset portion and sucked in from the branch pipe below the offset portion. Therefore,
Since ventilation piping is not required, slab opening work and increase in the number of man-hours for piping can be eliminated, and the cost of drainage stack pipe construction requiring offset piping can be reduced.

[Brief description of the drawings]

FIG. 1A is a side view showing an embodiment of a drainage stack offset coupling according to the present invention, and FIG. 1B is a top view of the same.

FIG. 2 is a view showing an example of a drainage outflow side connection portion of the drainage stack offset coupling according to the present invention.

FIG. 3 is a view showing an example of a drainage inflow side connection portion of the drainage stack offset coupling according to the present invention.

FIG. 4 (A) is a side view showing a connection part by the drainage stack offset coupling according to the present invention, and FIG. 4 (B) is a cross-sectional view taken along the line B in FIG. 4 (A). .

FIG. 5 is a drawing showing a normal building drainage pipe.

FIG. 6 is a drawing showing a conventional offset pipe of a building drainage stack.

[Explanation of symbols]

 A Lower vertical pipe B Upper horizontal or diagonally upward pipe C Drainage stack offset joint 1 Joint body 2 Drainage outflow side connection part 21 Flange 22 Flanged socket 23 Packing holding plate 24 Packing 25 Bolt 3 Drainage inflow Side connection part 31 Flange 32 Flanged receptacle 33 Flange 34 Flanged lip packing 35 Flange 36 Holding plate 4 Guide path

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F16L 23/028 43/00 (72) Inventor Koji Okumura 75 Nojiri, Kurito-cho, Kurita-gun, Shiga Prefecture Sekisui Tubing Technics Co., Ltd. Terms (reference) 2D061 AA04 AB03 AB06 AC06 AD01 3H016 AB02 3H019 EA11

Claims (4)

[Claims] 1. A joint used for offsetting a standing pipe in a drainage pipe for a building, wherein a drainage outflow side connection part to which a lower vertical pipe is connected is provided at a lower end of a joint body having an upper end closed, and The drainage inflow side connection portion to which the horizontal or obliquely upward pipe is connected is provided on a side surface of the joint body through a guide path for turning the inflow drainage into a swirling flow along the inner periphery of the joint body. Features a drainage stack offset fitting. 2. The drainage stack offset joint according to claim 1, wherein a cleaning port is provided in the joint body. 3. The drainage stack offset coupling according to claim 1, wherein the drainage outflow side connection portion and the drainage inflow side connection portion have a flange connection structure. 4. The drainage stack offset coupling according to claim 1, wherein the drainage outflow side connection portion has the flange connection structure, and the drainage inflow side connection portion has a plug-in connection structure.