JP2011084922A - Drain pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain pipe joint which can reduce slab-cutting work as much as possible when a double pipe drain system is remodeled into a single pipe drain system, and to improve construction performance by weight reduction in piping work in a new construction. <P>SOLUTION: A cylindrical trunk 2 has an outer diameter which is substantially larger by one size in a standard size than the outer diameter of a vertical pipe P1 connected thereto. A lateral branch pipe connection part 3a has a flange 33 at its end at a side connected to a lateral branch pipe P2 with a diameter wider than the diameter of the other portion, and a curved cylindrical portion 31 communicating with the cylindrical trunk 2 and curving downward toward the cylindrical trunk 2. The lower end of the flange 33 is located below the curved lower end of the curved cylindrical portion 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drainage pipe joint used at a junction between a vertical pipe and a side branch pipe.

  Conventionally, a two-pipe drainage system (see, for example, Patent Document 1) is used as a multi-story building drainage system. In the case of a two-pipe drainage system, the vent pipe is drained separately from the drainage vertical line. Since it is arranged in parallel with the vertical pipe line, there is a problem that a lot of piping space must be taken, and a vent pipe that is not directly related to drainage must be provided separately. There is a problem that a great deal of cost is required.

  Therefore, it is connected to the cylindrical body with a diameter that is larger than the connected standpipe and the side branch pipe connecting part projects from the side, and the lower end of this cylindrical body, and gradually shrinks downward. A drain pipe joint (aggregate joint) having a tapered cylinder part having a diameter and a swirl vane on the inner wall surface of the taper cylinder part has already been proposed (see, for example, Patent Document 2).

That is, since the drainage pipe joint is provided with swirl vanes, the drainage that flows into the cylindrical body from the upper floor via the vertical pipe and the drainage that flows into the cylindrical body via the side branch pipe connection part. As a swirl flow received by the swirl vane, an air core is always generated in the drainage vertical pipe so that the drainage performance that is the same as that of the two-pipe drainage system can be secured in the single-pipe drainage system.
In addition, the cylindrical body is expanded to the same inner diameter as a pipe with a larger nominal diameter by two or more sizes compared to the connected standpipe so that the inside of the joint joint is not blocked even if a large amount of drainage flows from the side branch pipe. It has become.

JP 2001-3419 A Japanese Patent No. 3567427

By the way, the above-mentioned drainage pipe joint with swirl blades is a drainage pipe whose cylindrical body is used in a two-pipe drainage system as described above in order to ensure sufficient drainage performance similar to a two-pipe drainage system. The diameter is considerably larger than the joint.
Therefore, when renovating an existing building from a two-pipe drainage system to a single-pipe drainage system, the above-mentioned drainage pipe joint with a swirl blade having a large diameter cylindrical barrel has two pipes. After removing the drainage pipe joint of the drainage drainage system, cut the circumference of the insertion hole of the drainage pipe joint of the two pipe drainage system remaining on the concrete slab, and the cylindrical body of the drainage pipe joint with swirl blades A hole must be formed to accommodate the part.

However, the above-described cutting work not only increases the construction period, but also involves using a tool such as a rock drill to generate noise and dust. Moreover, there is a possibility that the strength of the slab and the strength of the entire building may be reduced by cutting.
In addition, the conventional drainage pipe joint with swirl blades has a problem that the manufacturing cost is high and the workability is high because the cylindrical body has a large diameter as described above. .

  In view of the above circumstances, the present invention can reduce slab cutting work as much as possible when refurbishing a two-pipe drainage system to a single-pipe drainage system, and can also reduce the weight in piping work for a new building. It aims at providing the drainage pipe joint which can improve workability.

  In order to achieve the above object, a drainage pipe joint according to the present invention is provided with an upper vertical pipe connection portion and a vertical pipe provided below the upper vertical pipe connection portion and larger than the vertical pipe connected to the upper vertical pipe connection portion. A cylindrical barrel having a diameter, a side branch pipe connecting portion continuously provided on a side wall of the cylindrical barrel, and a tapered cylinder continuously provided at the lower end of the cylindrical barrel and gradually reducing its diameter downward. And a drain pipe joint provided with a swirl vane on the inner wall surface of at least one of the cylindrical body part and the tapered cylinder part. The cylindrical body has an outer diameter that is substantially one size up from the vertical pipe to be connected, and the horizontal branch pipe connecting part is connected to the other end of the side branch pipe at the other side. It has a diameter-enlarged portion that has a larger diameter and a curved cylindrical portion that communicates with the cylindrical barrel and curves downward toward the cylindrical barrel. , The lower end of the enlarged diameter portion, is characterized by being disposed below the curved lower end of the curved tube section.

  In the present invention, the outer diameter of one size up means a steel pipe (including a lining steel pipe) or a vinyl chloride resin pipe (a vinyl chloride resin pipe is an inner layer and an inorganic material fireproof layer is an outer layer) used as a drainage vertical pipe. The outer diameter is almost the same as the size increase in increments of each size (including fireproof two-layer pipes). For example, when the drainage pipe is a steel pipe size 80A, the outer diameter of one size up is the size of the steel pipe It almost coincides with the outer diameter of 100A.

Further, the standing pipe to be connected is not particularly limited, but the nominal diameter is preferably 80A.
Although the said curved cylinder part is not specifically limited, The curvature radius of the tube bottom is 20 mm-100 mm.
The reason is that if the radius of curvature is too small, there is a risk that the drainage flowing from the horizontal branch pipe into the vertical pipe cannot be sufficiently guided downstream of the drainage vertical pipe. This is because the length to the end becomes long and the drain pipe joint may not fit in the pipe shaft.

In the present invention, in order to improve the drainage performance, the cylindrical body is disposed on the inner wall surface of which the upper end is located above the bottom of the side branch pipe connected to the side branch pipe connection part. It is preferable that a part swirl blade is provided.
In addition, as for the cylindrical trunk | drum swirl | blade, as shown above, the inflow of the waste_water | drain from a side branch pipe is large because an upper end is located above the pipe bottom of a side branch pipe connected to a side pipe connection part. In this case, it is possible to more reliably prevent the vertical pipe from being blocked by suppressing the splashing of the drainage from the horizontal branch pipe by the cylindrical trunk turning blade.

Moreover, the difference in height between the bottom of the horizontal branch pipe and the upper end of the cylindrical trunk revolving blade is not particularly limited, but is preferably at least 50 mm.
That is, if it is less than 50 mm and it is going to give the cylindrical trunk | drum swirl | wing blade of an appropriate magnitude | size (horizontal projection area), the lower end of a cylindrical trunk | drum swirl | wing blade will be installed from the pipe bottom of a horizontal branch pipe to the downward direction greatly. As a result, the drainage from the side branch pipe may jump up by the swirl vanes and block the inside of the vertical pipe.

Moreover, in order to further improve the drainage performance, the lower end of the cylindrical trunk revolving blade is preferably disposed below the bottom of the side branch pipe connected to the side branch pipe connection part.
That is, when the lower end of the swirl tube body rotating blade is above the bottom of the horizontal branch pipe, the difference in height between the lower end of the tube body swirl blade and the upper end of the tube body swirl blade is small. As a result, the inclination angle (relative to the central axis of the vertical pipe line) of the cylindrical body swirl blade becomes tight. However, if the tilt angle becomes tight, even if a cylindrical trunk swirling blade with the same horizontal projection area is installed, the area of the swirling blade itself is smaller than the cylindrical trunk swirling blade installed at a loose angle, which is sufficient. In order to generate the swirl flow, the area in which the cylindrical body swirl blade is greatly extended into the cylindrical body has to be large (the horizontal projection area is large). On the other hand, if the area where the cylindrical body swirling blade is greatly extended into the cylindrical body is large, there is a possibility that the solid matter falling together with the drainage may be caught and the inside of the vertical pipe may be blocked. .

Further, the vertical distance from the bottom of the horizontal branch pipe to the lower end of the swirl blade is not particularly limited, but is preferably 10 to 80 mm.
That is, if the lower end of the cylindrical trunk swirl vane is arranged significantly below the bottom of the horizontal branch pipe, the drainage from the horizontal branch pipe may jump up by the swirl vane and block the inside of the vertical pipe. is there.

In addition, the cylindrical body swirl vane ensures sufficient drainage performance, and does not hinder the insertion of a test ball for a full water test or the obstacles such as filth flowing down in the drainage. The inclination angle with respect to the axis is 20 ° to 50 ° (more preferably 25 ° to 40 °), and the projected area ratio to the internal cross-sectional area of the connected standpipe is 5% to 30% (more preferably 10% to 30%).
That is, if the inclination angle of the cylindrical body swirl blade is less than 20 °, there is a possibility that the waste water flowing down from above by the tubular body swirl blade cannot be made a sufficient swirl flow. There is a possibility that it may become an obstacle to insertion of test balls for testing or an obstacle such as filth flowing down in the drainage.
On the other hand, if the projected area of the cylindrical body swirl blade is less than 5% with respect to the internal cross-sectional area of the vertical pipe, there is a possibility that the drainage flowing down from above by the swirl blade cannot be made a sufficient swirl flow. If the ratio exceeds 50%, there is a risk of obstacles such as insertion of test balls for full water tests and dirt that flows down when mixed with drainage.

In the present invention, it is preferable that the tapered tube portion includes a tapered tube portion swirl blade on the inner wall surface in order to improve drainage performance.
The tapered cylindrical swirl blade has an inclination angle with respect to the tube axis of the cylindrical body portion of 15 so as to ensure sufficient drainage performance and not to obstruct solid matter flowing down along the drainage pipe along with drainage. The projected area with respect to the internal cross-sectional area of the connected standpipe is 3% to 25% (more preferably 10% to 20%). preferable.

That is, if the inclination angle of the tapered tube portion swirl vane is less than 15 °, there is a possibility that the drainage flowing down from above by the taper tube portion swirl blade cannot be made a sufficient swirl flow. There is a risk that it may become an obstacle to the insertion of the test ball or an obstacle such as filth flowing down in the drainage.
On the other hand, if the projected area of the tapered cylindrical swirl vane is less than 3% of the internal cross-sectional area of the vertical pipe, there is a possibility that the drainage flowing down from above by the tapered tubular swirl vane cannot be sufficiently swirled. If it exceeds 25%, there is a risk of hindrance to insertion of a test ball for a full water test or dirt, etc. flowing down mixed with drainage.

  The material of the drainage pipe joint of the present invention is not particularly limited, and examples thereof include castings, vinyl chloride resins, and olefin resins such as polyethylene and polypropylene. Moreover, in the case of a synthetic resin, you may install the material which has fire resistance in the part which penetrates a slab.

In the drainage pipe joint according to the present invention, the cylindrical body has an outer diameter that is substantially one size up from the standpipe to which the pipe is connected, and the side branch pipe connection part is the connection side end of the side branch pipe The portion has a diameter-expanded portion that is larger than the other portion, and includes a curved cylindrical portion that communicates with the cylindrical barrel portion and curves downward toward the cylindrical barrel portion, and the lower end of the enlarged-diameter portion is Since it arrange | positions below the curved lower end of a curved cylinder part, when renovating a two-pipe drainage system to a single-pipe drainage system, cutting of a slab can be reduced as much as possible. Of course, even if it is a single pipe type, the drainage performance more than a two pipe type drainage system can be obtained.
That is, when the drainage from the horizontal branch pipe enters the horizontal branch pipe connection portion, the curved cylindrical portion flows into the cylindrical trunk portion as a flow directed obliquely downward. Therefore, even if the diameter of the cylindrical body is narrower than the outer diameter of the small vertical pipe compared to the conventional drainage pipe joint, the taper in the cylindrical body from the side branch pipe connection part and below it The drainage that has flowed into the cylindrical portion is prevented from closing the inside of the cylindrical barrel portion or the tapered cylindrical portion, and sufficient drainage performance is ensured.

  Moreover, since the lower end of the said enlarged diameter part is arrange | positioned below the curved lower end of a curved cylinder part, it can construct so that a side branch pipe connection part may be mounted on the upper surface of a slab. That is, the connected lateral branch pipe can be piped along the upper surface of the slab.

It is a front view showing 1st Embodiment of the drain pipe joint concerning this invention. It is a top view of the drain pipe joint of FIG. It is a bottom view of the drain pipe joint of FIG. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is the YY sectional view taken on the line of FIG. It is sectional drawing explaining the connection method of a standing pipe and a side branch pipe to the drain pipe joint of FIG. It is a front view showing 2nd Embodiment of the drain pipe joint concerning this invention. It is a front view showing 3rd Embodiment of the drain pipe joint concerning this invention. It is a front view showing 4th Embodiment of the drain pipe joint concerning this invention. It is a front view showing 5th Embodiment of the drain pipe joint concerning this invention. It is a schematic diagram explaining the experimental drainage vertical line equivalent to the 17th floor of the apartment used in the Example and the comparative example. 10 is a front view of a drainage pipe joint used in Comparative Example 3. FIG. 10 is a front view of a drainage pipe joint used in Comparative Example 4. FIG. 10 is a front half sectional view of a drainage pipe joint used in Comparative Example 5. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 5 show a first embodiment of a drain pipe joint according to the present invention.

  As shown in FIGS. 1 to 5, the drainage pipe joint A is formed of a casting, and has an upper vertical pipe connection part 1, a cylindrical body part 2, a lateral branch pipe connection part 3 a, and a tapered cylindrical part. 4 and a lower vertical pipe connection portion 5a.

As shown in FIG. 6, the upper vertical pipe connecting portion 1 has a receiving structure into which the lower end of the vertical pipe P1 is inserted. Normally, at the factory shipment stage, the upper vertical pipe connecting portion 1 is watertight at the lower end portion of the inserted vertical pipe P1. The rubber ring packing 11 that is externally fitted to the rim is fitted as shown in FIGS.
The rubber ring packing 11 is made of a rubber material normally used in drainage facilities such as ethylene-propylene-diene rubber (EPDM), and is a self-sealing type with a lip 11a. It is bonded to the inner peripheral surface of the upper vertical pipe connection portion 1.
Then, as shown in FIG. 6, the upper vertical pipe connecting portion 1 is inserted with the lower end of the vertical pipe P1 from above with the rubber ring packing 11 mounted as described above, thereby lowering the lower end of the vertical pipe P1. The parts can be connected in a watertight manner.

The cylindrical body portion 2 has an outer diameter that is substantially the same as the outer diameter (about 114 cm) of a pipe having a nominal diameter (for example, equivalent to 100 A) that is one size larger than the nominal diameter (for example, 80 A) of the vertical pipe P1 to be connected. ing.
In addition, the cylindrical body portion 2 is provided with one side branch pipe connecting portion 3a to be described later on the side wall surface.
Further, the cylindrical body 2 includes a cylindrical body swirl blade (hereinafter referred to as “first swirl blade”) 21 and a baffle plate 22 on the inner wall surface.

The upper end of the first swirl vane 21 is above the tube bottom position of the side branch pipe P2 connected to the side branch pipe connecting portion 3a (shown by the one-dot chain line in FIG. 6), as indicated by the two-dot chain line in FIG. The lower end of the tube is located below the tube bottom position.
The first swirl vane 21 is provided at an angle of 20 ° to 50 ° with respect to the tube axis of the cylindrical body 2 and the first swirl vane to the internal cross section of the vertical pipe P1. The projected area of 21 is 5% to 30% of the internal cross-sectional area of the vertical pipe P1.

  The baffle plate 22 is provided so as not to block the end portion on the cylindrical trunk portion 2 side of the lateral branch pipe connecting portion 3a by the water film by the drainage flowing down along the pipe wall of the upper standing pipe. .

The lateral branch pipe connection portion 3 a includes a curved cylinder portion 31 and a lateral branch pipe connection port 32.
The curved cylinder part 31 is connected to the side wall surface of the cylindrical body part 2, communicates with the cylindrical body part 2, and curves downward toward the cylindrical body part 2.
The lateral branch pipe connection port 32 includes a flange 33 as an enlarged diameter portion having a screw hole 33a.
The flange 33 is provided such that the lower end thereof is at the same height as the lowermost end of the curved cylindrical portion 31 or a slightly lower position.

  Further, the side branch pipe connection port 32 can attach side branch pipes (50A in FIG. 6) P2 having three different diameters for nominal diameters 50A, 65A, and 80A. A horizontal branch pipe connection adapter (for 50A in FIG. 6) 6 corresponding to the pipe P2 can be attached and detached.

The horizontal branch pipe connection adapter 6 includes a self-sealing rubber ring packing (hereinafter referred to as “rubber ring packing for horizontal branch pipe”) 61 and a packing fixing cap 62.
A part of the side branch pipe rubber ring packing 61 is fitted into the side branch pipe connection port 32, and the remaining part is fitted into the cap main body 63 of the packing fixing cap 62.

The packing fixing cap 62 includes a cap main body 63 and a flange fixing portion 64.
The cap main body 63 is configured so that the remaining portion of the rubber ring packing 61 for the side branch pipe is fitted, and the outer diameter of the side branch pipe P2 connected to the position facing the pipe insertion portion of the rubber ring packing 61 for the side branch pipe. A lateral branch pipe insertion hole 63a having a slightly larger diameter is provided.
The flange fixing portion 64 has a screw insertion hole 64a in a portion corresponding to the screw hole 33a of the flange 33, and is firmly fixed to the flange 33 by screwing a fixing bolt 65 into the screw hole 33a through the screw insertion hole 62c. It is like that.

  The horizontal branch pipe connecting adapter 6 can be connected to the horizontal branch pipe P2 by one-touch connection by being attached to the horizontal branch pipe connecting portion 3a as described above. That is, as shown in FIG. 6, the tube end of the side branch pipe P2 is formed in the side branch pipe insertion hole 63a of the packing fixing cap 62 so that the pipe end of the side branch pipe P2 is placed in the rubber ring packing 61 for the side branch pipe. Then, the lip 61a of the rubber ring packing 61 for the side branch pipe is in close contact with the periphery of the side branch pipe P2, and is connected in a watertight state.

As described above, the horizontal branch pipe connecting adapter 6 is selected and attached so as to match the pipe diameter of the connected horizontal branch pipe P2. The bottom of the side branch pipe P2 connected to the side branch pipe connecting portion 3a via the line (shown by a one-dot chain line in FIG. 6) is at the same height regardless of the pipe diameter of the side branch pipe P2. It has become.
That is, the tube insertion center of the rubber ring packing 61 for the side branch pipe and the center of the side branch pipe insertion hole 63a are located on the side of the side branch pipe connection adapter 6 for the small diameter compared to the adapter 6 for the large diameter side branch pipe. Is provided eccentrically downward. And even if the horizontal branch pipe P2 of any pipe diameter is connected, the bottom of the horizontal branch pipe P2 is positioned below the upper end of the first swirl vane 21 and above the lower end.

The tapered cylinder part 4 is connected to the lower end of the cylindrical body part 2 and gradually decreases in diameter toward the lower side, and has the same inner diameter as the inner diameter of the upright pipe P1 to be finally connected.
Further, the tapered tube portion 4 includes one tapered tube portion swirl blade (hereinafter referred to as “second swirl blade”) 41 on the inner surface.

The second swirl vane 41 is provided to be inclined at an angle of 15 ° to 40 ° with respect to the tube axis of the cylindrical body 2 and the second swirl vane 41 to the inner cross section of the vertical pipe P1 is provided. The projected area is 3% to 25% of the internal cross-sectional area of the vertical pipe P1.
Further, the second swirl vane 41 is provided at a position shifted from the first swirl vane 21 by 180 ° around the tube axis of the cylindrical body 2.

The lower vertical pipe connecting portion 5a is connected to the lower end of the tapered tube portion 4, and is connected to the straight pipe portion 50 having the same inner diameter as the connected vertical pipe P1, and the lower end of the straight pipe portion 50. The receiving part 51 which can insert the upper end of P1 and the flange 52 provided with the screw insertion hole 52a are provided.
As shown in FIG. 6, the lower end of the receiving portion 51 is expanded so that the upper portion of the rubber packing 71 having an O-ring shape for sealing fits.

And this drainage pipe joint A can construct a single pipe type drainage system as follows.
(1) In the state where the rubber ring packing 11 and the side branch pipe connection adapter 6 are mounted, as shown in FIG. 6, a hole provided in the slab S from above the slab S ( The lower end portion of the drainage pipe joint A is inserted into the sleeve S1 so that the flange 33 of the side branch pipe connecting portion 3a can be received by the upper surface of the slab S.
(2) In the state where the fastening ring 7 and the O-ring-shaped rubber packing 71 are fitted to the upper end portion of the standpipe P1 on the lower floor, the standpipe 51 stands in the receiving part 51 of the lower standpipe connection part 5a. The upper end of the pipe P1 is fitted.

(3) The screw insertion hole 52a of the flange 52 and the screw insertion hole 72 of the tightening ring 7 are made to coincide with each other, and the tightening ring 7 and the flange 52 are formed at the tip of the bolt 73 that passes through both screw insertion holes 52a and 72. The nut 74 is screwed in until it is in close contact.
That is, by this screwing, the rubber packing 71 is compressed in the thickness direction by the tightening ring 7 and the flange 52, the outer peripheral surface of the vertical pipe P1 is tightened, and the upper end of the vertical pipe P1 is watertightly fixed to the lower end of the drainage pipe joint A. The
(4) Insert the lower end of the upright stand pipe P1 into the upper stand connection section 1 and make one-touch connection of the lower end of the stand pipe P1 in a watertight manner.
(5) The pipe end of the side branch pipe P2 is inserted into the rubber ring packing 61 for the side branch pipe, and the pipe end part of the side branch pipe P2 is connected in a watertight manner with one touch.
(6) The mortar M is filled in the gap between the hole S1 and the drainage pipe joint A.
The single-pipe drainage system is constructed by repeatedly performing the operations (1) to (6) on each floor. In addition, although not shown in figure, the lower end of the standing pipe of the lowest floor is connected to a horizontal main pipe via a leg joint.

As described above, the drainage pipe joint A is substantially the same as the outer diameter (about 114 cm) of a pipe having a nominal diameter (e.g., equivalent to 100A) one size larger than the nominal diameter (e.g., 80A) of the vertical pipe P1 to be connected. Since it has the same outer diameter, the entire joint can be reduced in weight.
Further, since the horizontal branch pipe connecting portion 3a includes the curved cylindrical portion 31, the drainage from the horizontal branch pipe P2 flows into the cylindrical barrel portion 2 while being guided obliquely downward by the curved cylindrical portion 31. . Therefore, even if the diameter of the cylindrical body part 2 is thin, the drainage flowing from the side branch pipe P2 does not block the inside of the cylindrical body part 2 or the tapered cylinder part 4, and sufficient drainage performance is ensured.

In addition, the drainage pipe joint A includes the first swirl vane 21 and the second swirl vane 41. The first swirl vane 21 is provided to be inclined at an angle of 20 ° to 50 ° with respect to the tube axis of the cylindrical body 2 and the first swirl vane to the internal transverse section of the vertical pipe P1. The projected area of 21 is 5% to 30% of the internal cross-sectional area of the vertical pipe P1.
On the other hand, the second swirl vane 41 is provided to be inclined at an angle of 15 ° to 40 ° with respect to the tube axis of the cylindrical body 2, and the second swirl vane to the internal cross section of the vertical pipe P1. The projected area of 41 is 3% to 25% of the internal cross-sectional area of the vertical pipe P1.
Accordingly, the drainage pipe joint A is improved in drainage performance as compared with the provision of the curved cylinder portion 31, and solid matter such as filth flowing down with the drainage is also transferred to the first swirl blade 21 and the second swirl blade 41. It flows smoothly without being caught. Moreover, the test ball used for the full water test is not caught.

The drainage pipe joint A is substantially one size larger than the vertical pipe P1 to which the outer diameter of the cylindrical body 2 is connected, and the outer diameter of the cylindrical body 2 is smaller than that of the conventional drainage pipe joint. Therefore, when refurbishing a two-pipe drainage system of an existing building to a single-pipe drainage system, after removing the drainage pipe portion of the two-pipe drainage system, the periphery of the hole S1 of the slab S is substantially cut. It is possible to prevent the noise and dust during the cutting operation of the slab S as much as possible, and the strength of the slab S and the building itself is not affected. Of course, since the cutting work becomes almost unnecessary, the construction period can be shortened.
And since the lower end of the flange 33 is arrange | positioned below the curved lower end of the curved cylinder part 31, it can construct so that the horizontal branch pipe connection part 3a may be mounted on the upper surface of a slab. That is, the horizontal branch pipe P2 to be connected can be piped along the upper surface of the slab S. Therefore, the upper space of the side branch pipe P2 can be used effectively, and the construction cost for supporting the side branch pipe P2 from below can be reduced.

FIG. 7 shows a second embodiment of the drainage pipe joint according to the present invention.
As shown in FIG. 7, the drainage pipe joint B is the same as the drainage pipe joint A except that the lower vertical pipe connection part 5 b has a shape of a differential opening composed of only a straight pipe part.

FIG. 8 shows a third embodiment of the drainage pipe joint according to the present invention.
As shown in FIG. 8, the drain pipe joint C has a lower vertical pipe connection portion 5 b having a differential shape, and a horizontal branch pipe connection port 34 of the horizontal branch pipe connection portion 3 b is connected to the upper vertical pipe connection portion. 1 has a receiving port shape for connecting a side branch pipe of 80A having the same structure as 1, and the lower end edge of the outer periphery of the side branch pipe connection port 34 as the enlarged diameter portion is disposed below the lower curved end of the curved cylindrical portion 31. Except for the above, it is the same as the drainage pipe joint A.

FIG. 9 shows a fourth embodiment of the drain pipe joint according to the present invention.
As shown in FIG. 9, the drainage pipe joint D is provided with two side branch pipe connection parts, a first side branch pipe connection part 3c and a second side branch pipe connection part 3d, which will be described in detail below. The drainage pipe joint A is similar to the above.
That is, the first side branch pipe connecting portion 3c is provided in the same structure and the same position as the side branch pipe connecting portion 3a of the drainage pipe joint A.
The second side branch pipe connecting portion 3d is dedicated to connecting a 50A side branch pipe, and is provided at a position rotated 180 ° from the first side branch pipe connecting portion 3c around the tube axis of the cylindrical body 2. Yes.

FIG. 10 shows a fifth embodiment of the drain pipe joint according to the present invention.
The drainage pipe joint E is provided except that the second side branch pipe connection portion 3d is provided at a position rotated by 90 ° from the first side branch pipe connection portion 3c around the tube axis of the cylindrical body portion 2. This is the same as the drainage pipe joint D.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the drainage pipe joint of the present invention is used when an existing two-pipe drainage system is modified to a single-pipe drainage system. It can also be used when constructing a system.
In the above embodiment, one swirl vane is provided for each of the cylindrical body and the tapered cylinder, but two or more may be provided.

  Specific examples of the present invention will be described below in comparison with comparative examples.

Example 1
As shown in FIG. 11, the outer diameter of the cylindrical body 2 is 114 mm, the inclination angle of the first swirl vane 21 is 20 °, the projected area ratio of the first swirl vane 21 is 30%, and the second swirl vane 41 is inclined. A drain pipe joint A1 of the same type as the drain pipe joint A shown in FIGS. 1 to 5 having an angle of 20 ° and a projected area ratio of the second swirl vane 41 of 3%, and a 75A vinyl chloride resin pipe as the standing pipe P1 (DV), 125A vinyl chloride resin pipe (DV) as the horizontal main pipe P3, and 75A / 125A special leg joint P4 connecting the horizontal main pipe P3 and the standpipe P1 on the lowest floor, An experimental drainage conduit P equivalent to the 17th floor of the apartment was formed.

(Example 2)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 20 °, the projected area ratio of the first swirl vane 21 is 5%, the tilt angle of the second swirl vane 41 is 20 °, and the second Except that the projected area ratio of the swirl vane 41 is 20%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 3)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 45 °, the projected area ratio of the first swirl vane 21 is 30%, the tilt angle of the second swirl vane 41 is 40 °, and the second Except for the projected area ratio of the swirl vane 41 being 3%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above using the same drainage pipe joint as in Example 1. .

Example 4
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 45 °, the projected area ratio of the first swirl vane 21 is 5%, the tilt angle of the second swirl vane 41 is 40 °, and the second Except that the projected area ratio of the swirl vane 41 is 20%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 5)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 12%, the tilt angle of the second swirl vane 41 is 30 °, the second Except that the projected area ratio of the swirl vane 41 is 15%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 6)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 20 °, the projected area ratio of the first swirl vane 21 is 30%, the tilt angle of the second swirl vane 41 is 40 °, and the second Except that the projected area ratio of the swirl vane 41 is 20%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 7)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 15 °, the projected area ratio of the first swirl vane 21 is 30%, the tilt angle of the second swirl vane 41 is 20 °, and the second Except that the projected area ratio of the swirl vane 41 is 3%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 8)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 50 °, the projected area ratio of the first swirl vane 21 is 30%, the tilt angle of the second swirl vane 41 is 25 °, and the second Except that the projected area ratio of the swirl vane 41 is 3%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

Example 9
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 3%, the tilt angle of the second swirl vane 41 is 30 °, the second Except that the projected area ratio of the swirl vane 41 is 15%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 10)
Example except that the outer diameter of the cylindrical body 2 is 114 mm, the inclination angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 12%, and the second swirl vane 41 is absent. Using the same drainage pipe joint as in No. 1, an experimental drainage conduit P corresponding to the 17th floor of the apartment was formed in the same manner as in Example 1 above.

(Example 11)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 12%, the tilt angle of the second swirl vane 41 is 10 °, and the second Except that the projected area ratio of the swirl vane 41 is 3%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Example 12)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 12%, the tilt angle of the second swirl vane 41 is 45 °, the second Except that the projected area ratio of the swirl vane 41 is 15%, an experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 above, using the same drainage pipe joint as in Example 1. .

(Comparative Example 1)
The outer diameter of the cylindrical body 2 is 114 mm, the tilt angle of the first swirl vane 21 is 25 °, the projected area ratio of the first swirl vane 21 is 12%, the tilt angle of the second swirl vane 41 is 30 °, the second The drainage pipe joint in which the projected area ratio of the swirl vane 41 is 15% and the side branch pipe connection part is a straight pipe part instead of the curved pipe part is used instead of the drainage pipe joint of the first embodiment. Except that, the experiment drainage pipe P corresponding to the 17th floor of the apartment was formed in the same manner as in Example 1 above.

(Comparative Example 2)
Except that the drainage pipe joint having the outer diameter of the cylindrical body portion 2 of 114 mm and without the first swirl vane 21 and the second swirl vane 41 is used in place of the drainage pipe joint of the first embodiment, the same as in the first embodiment. The experimental drainage pipe P equivalent to the 17th floor of the apartment was formed.

(Comparative Example 3)
Except that the drainage pipe joint 100 having the outer diameter of the cylindrical body part 110 having the shape shown in FIG. 12 and having no first swirl blade 21 and no second swirl blade 41 is used instead of the drainage pipe joint of the first embodiment. In the same manner as in Example 1, the experimental drainage conduit P corresponding to the 17th floor of the apartment was formed.

(Comparative Example 4)
The horizontal branch pipe connecting portion 210 shown in FIG. 13 has a straight tubular tube portion 211 instead of the curved tube portion, the outer diameter of the tubular body portion 220 is 91 mm, and the first swirl blade 21 and the second swirl blade 41. An experimental drainage conduit P equivalent to the 17th floor of the apartment was formed in the same manner as in Example 1 except that the drainage pipe joint 200 having no gap was used instead of the drainage pipe joint of Example 1.

(Comparative Example 5)
The horizontal branch pipe connecting part 310 shown in FIG. 14 has a straight tubular cylinder part 311 instead of the curved cylinder part, the outer diameter of the cylindrical body part 320 is 150 mm, there is no first swirl vane, and the second swirl vane Except that the drainage pipe joint 300 having an inclination angle of 330 of 30 ° and a projected area ratio of the second swirl vane 330 of 8% was used instead of the drainage pipe joint of Example 1, the same as in Example 1 above. An experimental drainage conduit P equivalent to the 17th floor of the apartment was formed.

In the case where the amount of waste water shown in Table 1 is allowed to flow down from the portion corresponding to the 15th to 17th floors of the experimental drainage pipe P obtained in Examples 1 to 12 and Comparative Examples 1 to 5, the portion corresponding to the second floor The maximum negative pressure generated inside the drainage pipe joint was measured based on the drainage capacity test method (SHASE method), and the results are shown in Table 1.
In addition, test balls were inserted from the portion corresponding to the 17th floor, the presence / absence of clogging of the test balls was examined, and the results are also shown in Table 1.
Furthermore, about each of the drain pipe joint used in Examples 1-12 and Comparative Examples 1-5, the installation property to the hole (diameter 100mm) of the slab of existing piping was investigated, and the result was combined with Table 1 and shown. .
In Table 1, the bending in the column of the shape of the connecting portion of the side branch pipe has a curved cylindrical portion, and the straight represents that having a cylindrical portion perpendicular to the cylindrical trunk portion. In Table 1, the projected area% is Represents the projected area ratio.

  As shown in Table 1, it can be seen that the drainage pipe joint of the present invention can ensure sufficient drainage performance even if the diameter of the cylindrical body is reduced.

A, B, C, D, E Drainage pipe joint 1 Upper vertical pipe connection part P1 Vertical pipe 2 Cylindrical trunk part 21 Cylindrical trunk part swirl blade 3a Side branch pipe connection part 3b First side branch pipe connection part 3c Second Horizontal branch pipe connection part 31 Curved cylinder part 33 Flange (expanded part)
4 Taper cylinder part 41 Taper cylinder part swirl blade 5a, 5b Lower vertical pipe connection part

Claims (7)

An upper vertical pipe connection,
A cylindrical body portion having a diameter larger than that of the standing pipe connected to the upper standing pipe connecting portion, provided below the upper standing pipe connecting portion,
A lateral branch pipe connecting portion connected to the side wall of the cylindrical trunk portion;
A tapered tube portion continuously provided at the lower end of the tubular body portion and gradually reducing in diameter toward the lower side;
A lower vertical pipe connecting portion connected to the lower end of the tapered tube portion, and
A drainage pipe joint provided with swirl vanes on the inner wall surface of at least one of the cylindrical body and the tapered cylinder,
The cylindrical body has an outer diameter that is approximately one size up in the standard from the connected standpipe,
The said side branch pipe connection part has a diameter-expanding part diameter-expanded from the other part in the connection side edge part of a side branch pipe, and it curves to the cylindrical trunk | drum and it curves below toward a cylindrical trunk | drum. A drainage pipe joint comprising a cylindrical portion and having a lower end of the enlarged-diameter portion disposed below a curved lower end of the curved cylindrical portion.   The drainage pipe joint according to claim 1, wherein the vertical pipe to be connected is 80A.   The cylindrical trunk | drum swirl | blade which an upper end arrange | positions above the pipe bottom of the horizontal branch pipe connected to a horizontal branch pipe connection part is provided in the inner wall surface of the cylindrical trunk | drum. The drainage pipe joint described in 1.   The drainage pipe joint according to claim 3, wherein the lower end of the cylindrical trunk swirl vane is disposed below the bottom of the side branch pipe connected to the side branch pipe connection part.   The inclination angle of the cylindrical body swirling blade with respect to the tube axis of the cylindrical body part is 20 ° to 50 °, and the projected area with respect to the internal cross-sectional area of the connected vertical pipe is 5% to 30%. The drainage pipe joint according to claim 3 or claim 4.   The drainage pipe joint according to any one of claims 1 to 3, wherein a tapered cylindrical part swirl vane is provided on an inner wall surface of the tapered cylindrical part. The inclination angle with respect to the tube axis of the cylindrical body portion of the tapered tubular portion swirling blade is 15 ° to 40 °, and the projected area with respect to the internal cross-sectional area of the connected vertical tube is 3% to 25%. The drainage pipe joint described.

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