JPH11140950A - Drain pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce secondary foaming quantity generated with swirling in a vertical pipe of drain. SOLUTION: In the drain pipe joint 10, an inflow port 12 and a discharge opening 13 are formed to the upper and lower sections of a joint body 11 respectively, and the drain pipe joint 10 is penetrated to the floor of a building and arranged in the vertical direction. A branch-pipe socket section 14, in which a branch pipe is connected in the horizontal direction, is formed to the joint body 11. Swirl vanes 15 swirling flowing-down water are installed to the internal surface 11A of the spherical joint body 11. A space L1 among projecting ends 15A projected towards the axial center O1 of the joint body 11 in the swirling vanes 15 and a site 11B facing the projecting ends 15A of a main-body internal surface 11A are set at the same value as a diameter D1 on the discharge opening side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe joint for connecting a drainage pipe of a low-rise or high-rise building.

[0002]

2. Description of the Related Art Generally, in order to prevent sewage odor (odor, sewage toxic gas) and pests in a drain pipe from entering a room, various equipment traps 2 are installed in a drainage apparatus as shown in FIG. Is required. However, if large negative pressure and positive pressure air pressure fluctuations occur in the drainage stack 3 at the time of drainage of the stack, the trapped water of the appliance trap is sucked out at the negative pressure floor as shown in FIG. , And is emitted while emitting "burdock noise". On the positive pressure floor, as shown in FIG. 10 (C), there is a case where a problem that the area surrounding the appliance is stained by "trap water splashing out" is caused.
Also, if the seal is broken (completely opened) by sucking or splashing, the user may encounter a problem that "sewage odor and sewage toxic gas enter the room". Such fluctuations in the air pressure in the vertical pipe occur because the drainage requires a large amount of air when flowing down the vertical pipe. As shown in FIG. 11, as the air inlet, a top ventilation pipe 4 is provided above the drainage riser, and a vent cap (intake port) 5 (see FIG. 11) is provided at the top. However, in the drainage pipe on the middle floor located at a distance from the top vent cap 5, the supply of air is interrupted by the flowing water, and the air supply tends to be insufficient, and a negative pressure is generated there (see FIG. 10B). In addition, a large amount of air flowing down the standing pipe must be smoothly discharged to the outdoor meeting place pit 6. However, if the flow in the horizontal main pipe 8 between the drainage standing pipe 3 and the meeting place pit 6 is not smooth. This rebounds to the instrument trap section on the lower floor, generating a positive pressure there (see FIG. 10C).

In order to prevent such troubles, it is necessary to maintain the air pressure in the pipe within a certain limit. Make a core and escape ventilation pipe 7
The ability to flow a large amount of flow without the need for (see FIG. 11)
A special drain collecting pipe joint having a multidirectional joint function of connecting a standing pipe and a plurality of drain branch pipes has been proposed. A special drainage pipe joint used for piping such a drainage pipe (single-pipe drainage riser) system is shown in FIGS.
As shown in FIG. 3, the joint body 8 has a cylindrical shape,
One or a plurality of downflow water swirling blades 9 are provided inside.

[0004]

However, in the above-mentioned conventional drain pipe joint, since the swirling blades are provided inside the cylindrical main body, the area of the blades must be increased in order to secure a desired turning performance. Therefore, the swirling blades are provided so as to protrude largely toward the center of the main body. That is, the interval L (L <D, D is the diameter on the discharge port side) between the protruding end of the swirling blade and the portion of the inner surface of the main body facing the protruding end becomes extremely small. In the drainage pipe joint having such a configuration, for example, in the case of drainage containing a high foaming detergent, when the falling detergent drainage is agitated by swirling inside the joint, a large amount of secondary foaming is generated in the vertical pipe, and a large positive pressure is generated. Thus, there is a problem that various traps are opened in the lower layer. Further, a phenomenon in which bubbles enter the room from various opened instrument traps may occur. In addition, if the diameter of the joint or the standpipe is increased in order to solve such a problem, there is a problem that the joint or the standpipe itself becomes heavy and large, resulting in an increase in cost.

The present invention has been made in order to eliminate the above-mentioned drawbacks. The present invention maintains a compact pipe diameter, and generates water in a pipe even if the falling water contains a substance having high foaming properties such as a detergent. An object of the present invention is to provide a drainage pipe joint capable of suppressing the amount of secondary foaming.

[0006]

The drainage pipe joint according to the present invention is provided with a vertically arranged inlet and outlet, and a branch pipe receiving part to which a branch pipe is connected in a horizontal direction. In the drainage pipe joint having a main body having, and a down-flow water swirl vane provided inside the main body to swirl the down-flow water, an interval between a protruding end of the down-flow water swirl vane and a portion facing the protruding end on the inner surface of the main body, The diameter is substantially the same as or larger than the diameter on the discharge port side.

In the drain pipe joint according to the present invention, the distance between the projecting end of the swirling blade and the portion of the inner surface of the main body facing the projecting end is substantially the same as the diameter of the discharge port side or larger than the diameter of the discharge port side. As a result, the amount of secondary foaming when the wastewater containing the detergent flows down while swirling is reduced. For example, a small amount 2
Even if the next bubbling occurs, an air passage without drainage flow can be secured also at the protruding end of the swirl vane and the inner surface of the main body, so that an air passage without drainage flow can be secured at the center over the entire pipe. . For this reason, the air pressure fluctuation can be suppressed to a small value, and it is possible to prevent the various device traps from being broken.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a sectional view showing a drain pipe joint according to one embodiment of the present invention, and FIG. 2 is a plan view of the drain pipe joint of FIG. As shown in FIG. 1, the drain pipe joint 10 according to the present embodiment is formed in a spherical shape and includes a joint body (main body) 11 having an inlet 12 and an outlet 13 at upper and lower sides, respectively, as shown in FIG. 4. As such, it is arranged vertically through the floor 21 of the building. As shown in FIGS. 1 and 2, the joint main body 11 includes a branch pipe receiving portion 14 to which a branch pipe 20 (see FIG. 4) is connected in a lateral direction. Upper inlet 12 and branch pipe inlet 1
4, an insertion rubber 16 is attached to each. A swirl vane 15 for swirling downflow water is provided inside the joint body 11.

The swirl vane 15 is formed of a triangular plate piece having an obtuse angle formed in a curved shape, and has a main body inner surface 11A.
Along the curved surface, so as to protrude toward the axial center O ₁ of the spherical joint body 11, and, (see FIG. 3) a predetermined angle α relative to the longitudinal axis is provided with an inclination. However, the swirl vanes 15 of the drain pipe joint 10 according to this embodiment, part 1 facing the said projecting end 15A of the projecting end 15A and the fitting body inner surface 11A that protrudes toward the axis O ₁ of the joint body 11
The distance L ₁ between 1B, are set substantially the same as the diameter D ₁ of the outlet side. In addition, the upper end 15B of the swirling blade 11 has
Branch pipe socket portion 14 a predetermined allowed height h ₁ is positioned lower than the inner diameter lowermost portion 14A of the opening surface A ₁ of the provided. For this reason, the drainage that has merged from the branch pipe 20 (see FIG. 4) into the joint body 11 also changes to a swirling flow. An inlet 12 and an outlet 13 connected to the joint body 11 respectively.
And each connecting portion 12C, 13C, 14 of the branch pipe receiving portion 14
C is formed into a smooth curved surface in the flow direction. The branch pipe receiving portion 14 is provided such that the center O _{4 of} the bore is located above the center O ₃ of the spherical joint body 11, and the branch pipe receiving portion 1 is provided.
A connection portion 13C between the joint body 4 and the joint body 11 is inclined downward from the upper branch pipe receiving portion 14 to be connected to the joint body 11. Further, the joint main body 11 sets the diameter of the inflow port 12 to be larger than the diameter of the discharge port 13.

Next, the operation of the drain pipe joint 10 according to the present embodiment will be described. As shown in FIG. 4, the drainage fitting 10 is configured such that when the downflow wastewater W is introduced from the upper inlet 12,
It is smoothly introduced into the joint body 11 from the connection portion 12C formed on the curved surface. The downflow wastewater W introduced into the joint main body 11 hits the swirling blade 15 and flows down as a swirling flow along the inner surface 11A of the joint main body 11. In this case, the distance L ₁ between the portion 11B facing the aforementioned projecting end 15A of the projecting end 15A and the fitting body inner surface 11A of the swirl vane 15, because the set substantially the same as the diameter D ₁ of the outlet side, projecting end 15A and the portion 11B can be widened, and the portion of the protruding end 15A is not blocked by the drain flow,
It is possible to reliably secure an air passage without drainage flow.
For this reason, even if the downflow wastewater W contains a detergent and a small amount of secondary foaming occurs, it is possible to secure an air passage (air core) in which no drainage flow exists in the center over the entire drainage riser, Fluctuations in the air pressure in the drainpipe can be suppressed to a small degree, and the trapping phenomenon of various instrument traps can be prevented. Thus, in the drain pipe joint according to the present embodiment,
With a simple configuration, it is possible to maintain the size of the drainage riser compact without increasing the diameter thereof, and furthermore, it is possible to prevent the various device traps from being broken.

FIG. 5 to FIG. 7 show another embodiment of the present invention. In the above embodiment, the joint body 11 is formed in a spherical shape. Is formed in a large-diameter cylindrical shape. The swirl vane 115 formed inside the joint main body 110 is formed of a triangular plate piece having an obtuse angle formed in a curved shape similarly to the above-described embodiment, and along a conical curved surface of the main body inner surface 111A, The joint body 111 is provided so as to protrude toward the axis O ₂ of the joint body 111 and is inclined at a predetermined angle α with respect to the longitudinal axis direction. The swirl vane 115 is set a distance L ₂ between the sites 111B facing the said projecting end 115A of the protruding end 115A and the fitting body inner surface 111A, substantially the same as the diameter D ₂ of the discharge port side.

FIGS. 8 and 9 show a modification of the present invention. In each of the above embodiments, the joint body is formed in a spherical shape or a cylindrical shape, respectively.
The joint main body 210 is formed in an elliptical shape. The swirl vane 215 formed inside the joint main body 210 is formed of a triangular plate piece having an obtuse angle formed in a curved shape, as in the above embodiments, and follows the elliptical curved surface of the main body inner surface 211A. Te, so as to protrude toward the axis O ₅ of the joint body 211, and is provided inclined at a predetermined angle relative to the longitudinal axis. The swirling blade 215 is connected to the protruding end 21.
The distance L ₃ between the sites 211B facing the 5A and the projecting end 215A of the fitting body inner surface 211A, the diameter of the outlet-side D
Almost the same as ₃ . In this modification,
Although the joint body 210 is formed in an elliptical shape, it may be formed in an egg shape.

In each of the above embodiments and modifications, the distance L ₁ , L ₂ , L between the protruding end protruding toward the axial center of the swirl vane and the portion of the inner surface of the joint body facing the protruding end is described.
₃ is set to be substantially the same as the diameters D ₁ , D ₂ , and D ₃ on the discharge port side, but is not limited to this. L ₁ , L ₂ , L
_3, the diameter D ₁ of the outlet side, D _2, may be set larger than _{D 3 (L 1> D 1} , L 2> D 2, L 3> D 3) It goes without saying. Further, in each of the above embodiments, the joint main body is formed in a spherical shape or a cylindrical shape, but the present invention is not limited to this, and the interval between the projecting end of the swirling vane and the portion of the inner surface of the main body facing the projecting end is set. Needless to say, the shape may be substantially the same as the diameter of the discharge port side or a shape that can be set larger than the diameter of the discharge port side, and may be other shapes such as a cocoon shape or a truncated cone shape. No.
Needless to say, the inclination angle of the swirling blade can be changed according to the type of drainage. Further, a plurality of turning blades may be provided in the vertical direction.

[0014]

As described above, according to the drainage pipe joint according to the present invention, the distance between the projecting end of the swirl vane and the portion of the inner surface of the main body facing the projecting end is substantially the same as the diameter of the discharge port side. Or, by making the diameter larger than that, even if drainage having a high foaming property such as detergent flows in, the swirl vane portion is not blocked by the drainage flow, and the air without the drainage flow is surely provided. Since a passage can be secured,
Fluctuation of air pressure in the drainage stack can be suppressed, and good trapping performance of various instruments can be secured. Also, since the diameter of the drainage pipe can be kept small,
Cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a drain pipe joint according to an embodiment of the present invention.

FIG. 2 is a plan view of the drainage pipe joint of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an explanatory diagram showing a flow of drainage in a drainage drainpipe connected by the drainage pipe joint of FIG. 1;

FIG. 5 is a plan view showing a drainage pipe joint according to another embodiment of the present invention.

FIG. 6 is a sectional view of the drainage pipe joint shown in FIG. 5;

FIG. 7 is an explanatory diagram showing an inclination angle of a turning blade of the drainage pipe joint of FIG. 5;

FIG. 8 is a plan view showing a drain pipe joint according to a modification of the present invention.

FIG. 9 is an explanatory view showing an inclination angle of a swirl blade of the drainage pipe joint of FIG. 8;

10A is an explanatory view showing a normal state of trap water sealing in a drainage device, FIG. 10B is an explanatory view showing a trap opening state when a negative pressure is applied to a drainage riser side, and FIG. () Is an explanatory diagram showing a trapped state of the trap when the pressure of the drainage riser becomes positive.

FIG. 11 is an explanatory diagram showing the drainage system of a building and the tendency of air pressure in a pipe to occur.

FIG. 12 is a sectional view showing a conventional drain pipe joint.

13 is a plan view of the drainage pipe joint shown in FIG.

[Explanation of symbols]

10 drainage pipe fitting 11 fitting body (body) 11A body inner surface 11B interior body surface projecting end 20 branch L ₁ swirl vane portion 12 inlet 13 outlet 14 branch pipe mouth part 15 swirl vane 15A swirl vane facing the projecting end of diameter spacing D ₁ outlet side of the portion facing the projecting end of the projecting end and the body inner surface of the

Claims (8)

[Claims] 1. A main body having a longitudinally arranged inlet and outlet at the top and bottom, and a branch pipe receiving portion to which a lateral branch is connected in the horizontal direction, and a drainage water provided inside the main body. In a drainage pipe joint having a downflow swirl vane to be swirled, a distance between a projecting end of the downflow swirl vane and a portion of the inner surface of the main body facing the protruding end is substantially equal to a diameter of the discharge port side, or the diameter thereof. A drain pipe fitting characterized by being larger. 2. The drainage pipe joint according to claim 1, wherein the main body is formed in a spherical shape. 3. The drain pipe joint according to claim 1, wherein the main body is formed in an elliptical shape. 4. An apparatus according to claim 1, wherein the upper end of the falling water swirl vane is located at a predetermined height below the lowermost portion of the inner diameter opening surface of the branch pipe receiving portion. The drainage pipe joint according to the above. 5. An upper inlet, each connected to the body,
5. The connecting part of the lower discharge port and the branch pipe receiving part is formed with a smooth curved surface in the flow direction.
The drainage pipe joint according to the above. 6. The branch pipe receiving portion is provided above the main body,
The drainage pipe joint according to claim 5, wherein a connecting portion between the branch pipe receiving portion and the main body is inclined downward from the upper branch pipe receiving portion and connected to the main body. 7. The drain pipe joint according to claim 1, wherein the diameter of the upper inlet is set larger than the diameter of the lower outlet. 8. The drainage water according to claim 1, wherein the falling water swirl blade is formed of a plate-shaped member, and is provided at a predetermined angle with respect to the vertical direction in accordance with the flowing down water flowing in. Pipe fittings.