JP4754199B2 - Drainage pipe fitting - Google Patents

Description

  The present invention relates to a drainage pipe joint for connecting drainage side branch pipes of each floor to drainage standing pipes in drainage facilities in high-rise buildings such as apartment houses and high-rise apartments.

This type of drainage pipe joint has an upper receiving port for connecting the upstream side standpipe, a lower connecting port for connecting to the downstream side standpipe, a trunk between the upper receiving port and the lower receiving port, A horizontal branch pipe receiving port that is provided in the trunk portion and to which the drainage horizontal branch pipe is connected is provided. About this drainage pipe joint, various contrivances for making a large quantity of drainage which flows into a pipe smoothly flow down conventionally are made.
For example, by forming the trunk part larger in diameter than the upper receptacle, the vertical pipe drainage and the side branch pipe drainage can be smoothly merged, and consequently the pressure fluctuation in the pipe can be suppressed, and the drainage trap can be broken in advance. Technology to prevent is provided.
Also, in Japanese Patent No. 2631436, an inner pipe is provided directly below the upper receiving port, a speed reduction guide is provided on the inner peripheral side of the inner pipe, and the vertical pipe drainage flowing into the drainage pipe joint collides with the speed reduction guide. Thus, a technique is disclosed in which the pressure fluctuation in the pipe is suppressed by decelerating and then flowing down while turning in the pipe.
Furthermore, the gazette has a technology in which a tapered pipe part having a smaller diameter is provided at the lower part of the body part, and a speed reduction guide is provided on the inner wall surface of the tapered pipe part so that the drained water flows more reliably. It is disclosed.
Japanese Patent No. 2631436 JP-A-6-117000 Japanese Patent Publication No. 5-38195

As described above, conventionally, the diameter of the trunk portion is mainly increased and a speed reduction guide is provided to allow the drainage to flow down while swirling, thereby realizing a smooth merging of the vertical pipe drainage and the side branch pipe drainage.
However, in recent years, as for this type of drainage pipe joint, as a market need, there has been an increasing need to enable piping in a narrow space by reducing the diameter of the trunk (reducing the diameter).
In addition, it is necessary to increase the capacity of allowable drainage in response to the increase in the height of buildings such as super high-rise apartments.
In order to meet the needs of these markets, it is necessary to flow down a larger amount of drainage while smoothly swirling while reducing the diameter of the body that has been expanded in diameter as much as possible. It is necessary to further improve the deceleration function and the turning function.
An object of the present invention is to provide a drainage pipe joint capable of allowing a large amount of drainage to flow while turning more smoothly.

For this reason, this invention was set as the drainage pipe joint of the structure described in each claim of a claim.
According to the wastewater pipe joint of claim 1 Symbol placement, first drainage guide in order from the upstream side the position of the tube axis direction, and the second drainage guide, the third water discharge guide is arranged. First, the vertical drainage flowing down from the upper receiving port is received by the first drainage guide and decelerated. The drainage that has been decelerated by the first drainage guide and swiveled down is finally received and decelerated by the third drainage guide on the most downstream side, and is swirled into the downstream vertical pipe. . The third drainage guide on the most downstream side is provided with a larger tilt angle (steep slope) than the first and second drainage guides. For this reason, when the waste water flowing down while swirling is received by the third drain guide, the waste water flows down as a more reliable swirl flow.
In the case of this configuration, a configuration in which these three drainage guides are arranged so that drainage flowing down while turning through the first drainage guide can be directly received by the third drainage guide without passing through the second drainage guide, These three drainage guides can be arranged so that drainage flowing down while turning by the guide once passes through the second drainage guide and then received by the third drainage guide.

In this way, the vertical drainage received by the first drainage guide on the most upstream side can be decelerated and swirled, and then a more reliable swirling flow can be obtained by the third drainage guide on the most downstream side. It is possible to smoothly flow a large amount of drainage without expanding the diameter of the section larger than the vertical pipe, thereby piping in a narrow space in a super high-rise apartment house where a large amount of drainage needs to flow down at once. be able to.
The first drainage guide on the most upstream side can be provided in a direction inclined leftward as viewed from the tube center side (inclined to the left), for example, in a state inclined by 45 ° with respect to the horizontal plane. On the other hand, the third drainage guide on the most downstream side can be provided in a state inclined by 60 ° in the leftward tilt direction.

According to the drainage pipe joint of the second aspect, the drainage flowing down while turning through the first drainage guide is directly received by the third drainage guide through the second drainage guide or without passing through the second drainage guide. Since the third drainage guide is provided more steeply than the first drainage guide, the drainage received by the third drainage guide is decelerated and flows down as a stronger swirling flow. Thus, since the drainage flows as a swirl flow while being decelerated by the two or three drainage guides, a large amount of drainage can smoothly flow down without expanding the diameter of the trunk portion.
The position of the first drainage guide can be arbitrarily set with respect to the second and third drainage guides arranged opposite to the second position and the fourth position. For example, the first drainage guide can be arranged at the first or third position (orthogonal arrangement), and can be arranged at the second or fourth position (parallel arrangement) to obtain the same effects as described above. .

According to the drainage pipe joint according to claim 3, the first and second drainage guides are inclined to the left tilt direction by 30 ° to 50 °, and the third drainage guides are tilted to the left tilt direction by 50 ° to 70 °. Therefore, each drainage guide receives drainage and decelerates it, and it can be made a swirl flow. In particular, since the third drainage guide on the most downstream side is provided more steeply than the other two drainage guides, a more reliable swirl flow can be generated. The drainage received by the third drainage guide becomes a stronger swirling flow and flows down to the downstream side.
Moreover, about a forward inclination angle, a 1st drainage guide can be arbitrarily set within the range of 5 degrees-25 degrees centering on 15 degrees, and a 2nd drainage guide and a 3rd drainage guide are 2 degrees-respectively. It can be arbitrarily set within the range of 15. Furthermore, as for the distance from the tube center to the projecting tip, the first drainage guide and the second drainage guide can be arbitrarily set within a range of 10 to 30 mm centering on 22 mm, respectively, and the third drainage guide can be set to 40 mm. It can be arbitrarily set within a range of 30 to 50 millimeters as the center.
According to the drainage pipe joint of claim 4, the first to third drainage guides can be appropriately arranged in the pipe axis direction with respect to the pipe diameter of the connected standpipe, whereby the standpipe drainage and the lateral branch Pipe drainage can smoothly flow and flow down while swirling.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a drain pipe joint 1 of the present embodiment. The drainage pipe joint 1 is backfilled and fixed in a state of being penetrated by a concrete slab S that partitions each floor of the building. The drainage pipe joint 1 includes an upper receptacle 10 for connecting the upstream side stand 2, a lower connection portion 11 for connecting the downstream side stand 3, and the lower connection portion 11 and the upper receptacle 10. A trunk 12, two side branch pipe receptacles 13, 14 provided in the trunk 12, and a tapered pipe 15 provided in the lower part of the trunk 12.
A first drainage guide 21 is provided directly below the upper receiving port 10 so as to protrude inward of the pipe by a so-called meat thinning method.
The upper surface of the first drainage guide 21 is inclined at an angle α21 (leftward tilt angle α21) in a direction downward to the left as viewed from inside the pipe (leftward tilt direction). For this reason, when the vertical drainage that has flowed down is received by the upper surface of the first drainage guide 21, the vertical drainage becomes a counterclockwise swirling flow when viewed from the upstream side in the tube axis J direction.

The swirling flow generated by the first drainage guide 21 flows down while turning counterclockwise on the inner wall surface of the trunk portion 12 and passes above the opening portion 14 a on the inner wall surface side of the side branch pipe receiving port 14. This avoids a merging collision between the side branch pipe drainage flowing through the side branch pipe (not shown) connected to the side branch pipe receptacle 14 and the swirling flow (stand pipe drainage). The position of the first drainage guide 21 in the tube axis direction and the left inclination angle α21 are appropriately set so that the swirling flow generated thereby passes above the opening 14a.
The inclination angle α21 of the first drainage guide 21 is set to 40 ° with respect to the horizontal plane in this embodiment. The left inclination angle α21 of the first drainage guide 21 can be arbitrarily set within the range of 30 ° to 50 ° in addition to the configuration of setting to 40 ° as illustrated.
Further, as shown in FIG. 3, the upper surface of the first drainage guide 21 is inclined in a downward direction toward the tube center side. In the present embodiment, the upper surface of the first drain guide 21 is inclined at an angle of forward inclination β21 = 15 ° with respect to the horizontal plane. The forward tilt angle β21 can be arbitrarily set within a range of 5 ° to 25 °. Furthermore, the minimum distance (maximum overhanging dimension from the inner wall surface of the pipe) W21 between the distal end portion of the first drainage guide 21 and the pipe center is set to W21 = 22 mm. This minimum interval W21 can be arbitrarily set within a range of 10 mm to 30 mm.

Next, two drainage guides (a second drainage guide 22 and a third drainage guide 23) are provided in the tapered tube portion 15 provided in the lower portion of the trunk portion 12. The two drainage guides 22 and 23 are also provided so as to protrude inward of the pipe by the so-called meat thinning method, like the first drainage guide 21.
The two drainage guides 22 and 23 are arranged apart from each other in the direction of the tube axis J as shown in the figure, and the positions around the tube axis J are arranged to face each other. Details of the second drainage guide 22 are shown in FIGS. 4 and 5, and details of the third drainage guide 23 are shown in FIGS. 6 and 7.
As shown in FIG. 4, the second drainage guide 22 is set to a left tilt angle α22 = 40 °. This left inclination angle α22 can be arbitrarily set within a range of 30 ° to 50 °. Further, as shown in FIG. 5, the second drainage guide 22 is inclined in the direction of descending toward the tube center side at the forward inclination angle β22 = 5 °. This forward tilt angle β22 can be arbitrarily set within a range of 2 ° to 15 °. Furthermore, the minimum distance W22 between the projecting tip of the second drainage guide 22 and the tube center is set to 22 mm. This minimum interval W22 can be arbitrarily set within a range of 10 mm to 30 mm.

As shown in FIG. 6, the third drainage guide 23 is set to a left tilt angle α23 = 60 °. This left inclination angle α23 can be arbitrarily set within a range of 50 ° to 70 °. Further, as shown in FIG. 7, the third drainage guide 23 is inclined in a downward direction toward the tube center side at a forward inclination angle β23 = 2 °. The forward tilt angle β23 can be arbitrarily set within a range of 2 ° to 15 °. Furthermore, the minimum interval W23 between the protruding tip of the third drainage guide 23 and the tube center is set to 40 mm. This minimum interval W23 can be arbitrarily set within a range of 30 mm to 50 mm.
By receiving the drainage flowing down by the second drainage guide 22, the drainage is decelerated, and the momentum is applied again as a counterclockwise swirling flow. The swirling flow flowing down through the second drainage guide 22 is received by the third drainage guide 23 after being swung about 180 ° around the tube axis J.

FIG. 8 shows the positional relationship in the tube axis J direction of the first to third drainage guides 21 to 23 with respect to the tube center of the lateral branch tube receiving port 13 (lateral branch tube 4). As shown in the drawing, when the pipe diameter D of the vertical pipe 2 is set, the distance h1 between the width center of the first drainage guide 21 and the pipe center of the lateral branch pipe 4 is in a range of 1.4D to 1.8D. Can be set arbitrarily. Moreover, the space | interval h2 between the width center of the 2nd drainage guide 22 and the pipe center of the horizontal branch pipe 4 can also be set arbitrarily in the range of 1.4D-1.8D. Furthermore, the distance h3 between the width center of the second drainage guide 22 and the width center of the third drainage guide 23 can be arbitrarily set within a range of 0.8D to 1.0D.
Next, FIGS. 9 to 12 show a state in which the positional relationship between the first to third drainage guides 21 to 23 around the tube axis is viewed from the upstream side in the tube axis J direction. In FIGS. 9 to 12, a first position P1 to a fourth position P4 are set to divide the body portion 12 and the tapered tube portion 15 provided in the lower portion thereof into four equal parts about the tube axis, and any of these four positions P1 to P4 The state in which any of the first to third drainage guides 21 to 23 is located is shown. Each form described below shows a form in which the second drainage guide 22 is disposed at the second position P2 and the third drainage guide 23 is disposed at the fourth position P4.

FIG. 9 shows a form in which the first drain guide 21 is disposed at the first position P1, the second drain guide 22 is disposed at the second position P2, and the third drain guide 23 is disposed at the fourth position P4. . In the drain pipe joint 1 of the present embodiment shown in FIG. 1, the first to third drain guides 21 to 23 are arranged in the form shown in FIG. About the mutual position around the pipe axis of the 1st-3rd drainage guides 21-23, it can also arrange not only in the form illustrated above but in the form shown in Drawing 10-Drawing 12.
FIG. 10 shows a form in which the first and second drainage guides 21 and 22 are arranged at the second position P2, and the third drainage guide is arranged at the fourth position P4. FIG. 11 shows a form in which the second drain guide 22 is disposed at the second position P2, the first drain guide 21 is disposed at the third position P3, and the third drain guide 23 is disposed at the fourth position P4. ing. Further, FIG. 12 shows a form in which the second drainage guide 22 is disposed at the second position P2, and the first and third drainage guides 21 and 23 are disposed at the fourth position P4. Each of these forms corresponds to an embodiment of the invention described in claim 2 of the claims.
Even if the first to third drainage guides 21 to 23 are arranged in any of these forms with respect to the mutual positions around the pipe axis, the same effect can be obtained. That is, the vertical pipe drainage flowing down through the vertical pipe drainage 2 is received by the first drainage guide 21 and decelerated, and then it is allowed to flow down as a counterclockwise swirl flow, and this swirl flow is then swept to the second drainage guide 22 and the third drainage guide. By receiving and decelerating at 23 and flowing down as a swirling flow, a larger amount of drainage than before can be flowed smoothly while suppressing fluctuations in the pressure in the pipe.
In FIG. 19, the first drain guide 21 is disposed at a position (first position shown in FIG. 9 or third position shown in FIG. 11) orthogonal to the second and third drain guides 22, 23 around the tube axis. In the case of the orthogonal type, the first drainage guide 21 is disposed at a position overlapping the second drainage guide 22 or the third drainage guide 23 around the tube axis (the second position in FIG. 10 or the fourth position in FIG. 12). In the case of the parallel type, experimental data on the change in pipe pressure accompanying the increase in the amount of drainage is shown. In any type, if the pressure fluctuation in the pipe is 400 Pa or less, the drainage trap is avoided.
In this experimental data, it was confirmed that in the case of the orthogonal type, the drainage flow rate can be smoothly lowered to a maximum of about 9.5 L / s without causing the drainage trap to break. Moreover, even in the case of the parallel type, it was confirmed that a large amount of drainage can be smoothly flowed down to a maximum drainage flow rate of about 9.0 L / s without causing the drainage trap to break. Thus, by arranging the first to third drainage guides 21 to 23 appropriately in the pipe axis direction and appropriately setting the left tilt angle, a large amount of drainage flows smoothly while suppressing fluctuations in the pipe pressure. To be able to.

Next, the two lateral branch pipe receptacles 13 and 14 are arranged around the pipe axis J at an interval of 90 °. The two lateral branch pipe receptacles 13 and 14 are arranged at the same position (height) in the pipe axis direction. One end of the side branch pipe 4 for draining the toilet bowl is connected to the side branch pipe receiving port 13. A toilet (not shown) is connected to the other end of the horizontal branch pipe 4. The toilet drainage flows into the pipe joint 1 through the horizontal branch pipe 4. On the other hand, a horizontal branch pipe (not shown) for miscellaneous drainage is connected to the horizontal branch pipe receiving port 14. Kitchen drainage, remaining hot water in the bathtub, washing drainage, or the like flows into the pipe joint 1 through the horizontal branch pipe for miscellaneous drainage.
Inflow prevention ridges 16 and 17 are respectively provided above the openings 13a and 14a on the inner wall surfaces of the horizontal branch pipe receptacles 13 and 14, respectively. The inflow prevention walls 18 and 17 are respectively provided on the sides of the openings 13a and 14a. 19 is provided.
Both inflow prevention rods 16 and 17 are provided in the same manner. Details of the inflow preventing rod 17 on the opening 14a side are shown in FIGS. The inflow prevention rod 17 is formed with the same width E as the opening diameter d of the opening 14a. In addition, it can also provide wider than the opening diameter 14a (E> = d). The upper surface of the inflow prevention rod 17 is inclined in a V shape that descends from both end sides toward the center in the width direction. Further, the upper surface inclined in a V shape in the width direction is inclined in a direction descending at an angle of 45 ° toward the tube center side. For this reason, the drainage received on the upper surface of the inflow prevention rod 17 is collected at the center in the width direction and then flows down toward the center of the tube. As a result, the opening 14a is not blocked by the flowing water curtain, and consequently the pressure fluctuation in the pipe can be suppressed to prevent the drain trap from being broken. In addition, the inclination angle of the upper surfaces of both inflow prevention rods 16 and 17 in the direction going down to the tube center side is set to 45 ° as exemplified above, and is arbitrarily set within a range of 35 ° to 55 °. Can do.

Next, both the inflow prevention walls 18 and 19 are long along the pipe axis direction on the left side of the openings 13a and 14a on the upstream side in the swirling direction of the drainage (the right side when viewed from the pipe center side). Is formed. The length H in the tube axis direction of both inflow prevention walls 18 and 19 is formed longer than the opening diameter d of the openings 13a and 14a. The length H of both inflow prevention walls 18 and 19 may be set longer than the opening diameter d of the openings 13a and 14a (H ≧ d). Moreover, both inflow prevention walls 18 and 19 project radially toward the tube center. The inflow prevention walls 18 and 19 prevent the swirling drainage from flowing back into the lateral branch pipe receiving ports 13 and 14 through the openings 13a and 14a.
The overhang dimension of the inflow prevention walls 18 and 19 from the inner wall surface of the pipe is set to 15 mm. This overhang dimension can be arbitrarily set within a range of 5 mm to 20 mm. Further, in addition to the configuration in which both inflow prevention walls 18 and 19 project in the radial direction toward the tube center, a configuration in which the inflow prevention walls 18 and 19 project in a direction inclined with respect to the direction toward the tube center (radiation direction) may be employed.

According to the drainage pipe joint 1 of the present embodiment configured as described above, the vertical pipe drainage is decelerated and swirled by the first drainage guide 21 to generate a swirling flow. It passes above the opening 14a on the inner wall surface side. For this reason, the merging collision between miscellaneous drainage flowing through the lateral branch pipe for miscellaneous drainage connected to the lateral branch pipe receiving port 14 and the swirling flow (standing pipe drainage) is avoided, thereby suppressing the pressure fluctuation in the pipe. Therefore, the sealing water of the drain trap is surely maintained, and as a result, a smooth flow of drainage is secured.
Here, according to the drainage experiment conducted by the applicant, it has been confirmed that by using the illustrated drainage pipe joint 1, about 10 liters of drainage can flow smoothly per second. According to the conventional drainage pipe joint, in order to suppress the pressure fluctuation in the pipe and ensure smooth drainage, the drainage amount of about 6 liters per second was the upper limit, but by using the drainage pipe joint 1 of this embodiment, The drainage flow rate can be greatly increased. In this sense, the illustrated drainage pipe joint 1 can obtain a great effect when used in a drainage route in a high-rise building such as a high-rise apartment.
Furthermore, since the third drainage guide 23 is inclined at a larger left inclination angle α23 than the second drainage guide 22 (α23> α22), the swirling flow generated by the second drainage guide 22 has a greater flow momentum. It can be made to flow down to the downstream vertical pipe 3 as a swirling flow.

Various modifications can be made to the embodiment described above. For example, although the configuration having two side branch pipe receptacles 13 and 14 has been illustrated, it can also be applied to a drain pipe joint having one or three or more side branch pipe receptacles.
Further, as shown in FIG. 18, the upper joint 31 having an upper receiving port 31a to which the upstream side stand 2 is connected and the lower joint 32 having a lower connection portion 32a to which the downstream side stand 3 is connected are divided. It can also be applied to the so-called two-body drainage pipe joint 30. In the case of this two-body drainage pipe joint 30, the joint part 31b at the lower end of the upper joint 31 and the joint part 32b at the upper end of the lower joint 32 are joined at a fixed position around the pipe axis via a fitting part (not shown). ing. A first drain guide 33 is provided on the inner wall surface of the upper joint 31 so as to project inward from the pipe center by a thinning method. As in the previous embodiment, the first drainage guide 33 is set to a left tilt angle α33 = 40 °, a forward tilt angle β33 = 15 °, and W33 = 22 mm. Each of these set values can be arbitrarily changed within a certain range as described above.

A lateral branch pipe receiving port 34 is provided in the trunk portion 32 c of the lower joint 32. A tapered tube portion 32d having a smaller diameter toward the downstream side is provided at the lower portion of the body portion 32c of the lower joint 32. A second drain guide 35 and a third drain guide 36 are provided on the inner surface of the tapered pipe portion 32d so as to face each other around the pipe axis. Both drainage guides 35 and 36 are provided so as to incline in the leftward direction as viewed from the tube center side. Similar to the above embodiment, the second drainage guide 35 is set to the left tilt angle α35 = 40 °, the forward tilt angle β35 = 5 °, W35 = 22 mm, and the third drainage guide 36 is set to the left tilt angle α36 = 60 °, The forward tilt angle β36 = 2 ° and W36 = 40 mm are set. Each of these set values can also be arbitrarily changed within the certain range.
The third drain guide 36 is disposed so as to be shifted downstream in the tube axis direction with respect to the second drain guide 35. However, the lower part of the second drainage guide 35 and the upper part of the third drainage guide 36 overlap in the tube axis direction.
Further, an inflow prevention rod 37 is provided on the upper side of the opening 34a on the inner wall surface side of the side branch pipe receiving port 34 so as to protrude inward of the pipe. The inflow prevention rod 37 prevents the vertical drainage from flowing back to the side branch pipe receiving port 34 through the opening 34a. Further, an inflow prevention wall 38 is formed long along the tube axis direction on the side of the opening 34a that is upstream of the swirling method. The inflow prevention wall 38 prevents the drainage swirling along the inner wall surface of the pipe from flowing back into the side branch pipe receiving port 34 through the opening 34a.

The two-piece drainage pipe joint 30 provided with the first to third drainage guides 33, 35, and 36, the inflow prevention rod 37, and the inflow prevention wall 38 provided in this manner is the same as the integrated drainage pipe joint 1. The effect of this can be obtained. That is, the standpipe drainage is decelerated and swirled by the first drainage guide 33 to generate a swirling flow, and this swirling flow passes above the opening 34 a on the inner wall surface side of the side branch pipe receiving port 34. For this reason, the merging collision between the drainage flowing through the side branch pipe connected to the side branch pipe receptacle 34 and the swirling flow (stand pipe drainage) is avoided, thereby suppressing the pressure fluctuation in the pipe and sealing the drain trap. Water is reliably maintained, and as a result, a smooth flow of drainage is ensured.
Further, an inflow prevention rod 37 is provided above the opening 34a, and an inflow prevention wall 38 is provided on the side. Since the inflow prevention rod 37 and the inflow prevention wall 38 prevent the drainage from flowing back to the side branch pipe receptacle 34, a large amount of drainage can be swirled and allowed to flow down while suppressing fluctuations in the pipe pressure.
Further, the drainage guides 21 to 23, 33, 35, and 36 are exemplified by a structure in which the pipe wall surface is recessed inward by a so-called meat thinning method. It is good also as a structure which protrudes toward the direction. Moreover, it is good also as a structure which adhere | attaches (joins) each drainage guide prepared separately.
Moreover, the drainage pipe joint according to the present invention is not limited to cast iron but can be applied to resin.
In addition, toilet drainage and miscellaneous drainage were illustrated as side branch pipe drainage, but when only one drainage is drained through two side branch pipe receptacles or when other drainage is drained. The same can be applied.
Furthermore, as shown in FIG. 20, in the case of the drainage pipe joint 40 having the upper and lower two-level branch pipe receiving ports 41 and 42, the first drainage guide 45 is located upstream of the lower side branch pipe receiving port 41. The second and third drainage guides 46 and 47 are arranged at the same height in the tube axis direction and perpendicular to each other around the tube axis with respect to the upper side side branch tube receiving port 41, and the lower side side branch tube It can be set as the structure arrange | positioned in the downstream of the receptacle 42. FIG. Also in this case, the third drainage guide 47 is arranged so as to be shifted to the downstream side while overlapping the second drainage guide 46 in the tube axis direction. The drainage pipe joint 40 corresponds to an embodiment of the invention described in claim 5.
As described above, the drainage pipe joint 40 having the three drainage guides 45 to 47 can smoothly flow a large amount of drainage while suppressing pressure fluctuation in the pipe (without causing the drainage trap to be broken). .
In addition, the configuration in which the second and third drainage guides 22, 23, 35, and 36 are provided in the tapered tube portion 15 provided in the lower portion of the body portion 12 or the tapered tube portion 32d of the lower joint 32 is illustrated. It is good also as a structure provided not in the inner wall surface of 15 and 32d but in the inner wall surface of the trunk | drum 12, or the inner wall of the lower joint 32. FIG.

It is a side view of a drainage pipe joint concerning an embodiment of the present invention. It is the figure which looked at the 1st drainage guide from the pipe center side. It is a longitudinal cross-sectional view of a 1st drainage guide. It is the figure which looked at the 2nd drainage guide from the pipe center side. It is a longitudinal cross-sectional view of a 2nd drainage guide. It is the figure which looked at the 3rd drainage guide from the pipe center side. It is a longitudinal cross-sectional view of a 3rd drainage guide. It is a schematic diagram which shows the positional relationship of the pipe axis direction of the drainage guide of the drainage pipe coupling which concerns on embodiment of this invention. This figure shows the mutual positional relationship of the 1st-3rd drainage guide of the pipe-axis direction, Comprising: The positional relationship around a pipe axis is not shown. It is the top view which looked at the relative position around the pipe axis of the 1st-3rd drainage guide from the pipe axis direction upstream. This figure has shown the form by which the 1st drainage guide was arrange | positioned in the 1st position. It is the top view which looked at the relative position around the pipe axis of the 1st-3rd drainage guide from the pipe axis direction upstream. This figure has shown the form by which the 1st drainage guide was arrange | positioned in the 2nd position. It is the top view which looked at the relative position around the pipe axis of the 1st-3rd drainage guide from the pipe axis direction upstream. This figure has shown the form by which the 1st drainage guide was arrange | positioned in the 3rd position. It is the top view which looked at the relative position around the pipe axis of the 1st-3rd drainage guide from the pipe axis direction upstream. This figure has shown the form by which the 1st drainage guide was arrange | positioned in the 4th position. It is a top view of an inflow prevention gutter. FIG. 14 is a view taken from the direction of the arrow (14) in FIG. It is a (15)-(15) arrow directional view of FIG. 14, Comprising: It is a longitudinal cross-sectional view of an inflow prevention gutter. It is a cross-sectional view of a trunk | drum and an inflow prevention wall. FIG. 17 is a view taken in the direction of the arrow (17) in FIG. 16, and shows the opening of the lateral branch pipe receptacle and the inflow prevention wall as seen from the pipe center side. It is a side view of the two-piece type drain pipe joint concerning another form of the present invention. It is a figure which shows the experimental data about the fluctuation | variation of the pressure in a pipe | tube accompanying the increase in a waste_water | drain flow volume by the orthogonal | vertical type and parallel type about the position of a 1st drainage guide. It is a side view of the drainage pipe joint provided with the two-stage side branch pipe receptacle up and down.

Explanation of symbols

1 ... Drainage pipe joint (integrated)
2 ... Upstream side stand 3 ... Downstream side stand 4 ... Side branch pipe, D ... Diameter of the stand pipe 2 10 ... Upper receiving port 11 ... Lower connecting part 12 ... Body 13 ... Side branch receiving port, 13a ... Opening part 14 ... Horizontal branch pipe receptacle, 14a ... Opening part d ... Diameter (opening diameter) of the opening part on the inner wall surface side of the lateral branch pipe receptacle
DESCRIPTION OF SYMBOLS 15 ... Tapered pipe part 16, 17 ... Inflow prevention ridges 18, 19 ... Inflow prevention wall 21 ... 1st drainage guide alpha21 ... Left tilt angle of 1st drainage guide, β21 ... Forward tilt angle W21 of 1st drainage guide ... 1st drainage The distance 22 between the projecting tip of the guide and the pipe center 22nd drain guide α22 The left tilt angle of the second drain guide β22 The forward tilt angle W22 of the second drain guide W2 and the projecting tip of the second drain guide The distance 23 between the pipe center and the third drainage guide α23 ... the left tilt angle of the third drainage guide, β23 ... the forward tilt angle W23 of the third drainage guide ... between the projecting tip of the third drainage guide and the pipe center Interval S ... Concrete slab J ... Pipe axis (pipe center)
P1 ... 1st position, P2 ... 2nd position, P3 ... 3rd position, P4 ... 4th position E ... Width H of inflow prevention ridge ... Length of inflow prevention wall 30 ... Drainage pipe joint (two-body type)
31 ... Upper joint, 31a ... Upper receptacle, 31b ... Joint part 32 ... Lower joint 32a ... Lower connection part, 32b ... Joint part, 32c ... Body part, 32d ... Tapered pipe part 33 ... First drain guide 34 ... Side branch pipe Receiving port, 34a ... opening 35 ... second drainage guide 36 ... third drainage guide 37 ... inflow prevention rod 38 ... inflow prevention wall 40 ... drainage pipe joint (two-stage port type)
41 ... Upper side branch pipe receiving port 42 ... Lower side branch pipe receiving port 45 ... First drain guide 46 ... Second drain guide 47 ... Third drain guide

Claims (4)

It has an upper receiving port for connecting the upstream side vertical pipe at the upper part, and has a lower connecting part for connecting the downstream side vertical pipe at the lower side, and a cylinder between the lower connecting part and the upper receiving port. A drainage pipe joint having a side branch pipe receiving port for connecting a side branch pipe to the section in the pipe axis direction ;
The drainage which is provided on the inner wall surface of the body portion and projects from the inner wall surface and flows down and decelerates, and the drainage which flows down incline in the direction to the left as seen from the tube center side, flows upstream in the tube axis direction. Having first to third drainage guides turning counterclockwise as viewed from
The first drainage guide is on the downstream side of the upper receptacle, and on the upstream side of the lateral branch receptacle, the swirling flow generated by the first drainage guide is located above the opening on the inner wall surface side of the lateral branch receptacle. It is provided so as to pass through , and is disposed on the lower inner wall surface of the trunk portion on the downstream side of the horizontal branch pipe receptacle so as to face each other around the pipe axis, and overlaps each other in the pipe axis direction. The three drainage guides are arranged so as to be shifted downstream from the second drainage guide, and the third drainage guide is provided at a steep slope having a larger tilt angle with respect to the horizontal plane than the first and second drainage guides ,
A drainage pipe joint provided with an inflow prevention wall that prevents swirling drainage from flowing into the side branch pipe receiving port through the opening on the side of the opening on the inner wall surface side of the side branch pipe receiving port . The drainage pipe joint according to claim 1, wherein first to fourth positions that divide the body part into four parts in the circumferential direction are set with respect to positions around the pipe axis, and are opposed to each other around the pipe axis. A drainage pipe joint in which the second drainage guide and the third drainage guide are disposed at the second position and the fourth position, and the first drainage guide is disposed at any one of the first to fourth positions. The drainage pipe joint according to claim 1 or 2 , wherein the first drainage guide and the second drainage guide are set to 30 ° to 50 ° in a leftward tilt direction with respect to an inclination angle with respect to a horizontal plane viewed from the pipe center side. The third drainage guide is set to 50 ° to 70 ° in the leftward tilt direction, and the first drainage guide is set to 5 ° to 25 ° with respect to the tilt angle with respect to the horizontal plane in the forward tilt direction descending toward the tube center side. 2 and 3 drainage guides are each set to 2 ° to 15 °, and the distance from the tube center to the projecting tip is 10-30 mm for the first drainage guide and the second drainage guide, and 30-30 for the third drainage guide. Drainage pipe joint set to 50 mm. The drainage pipe joint according to any one of claims 1 to 3, wherein the first drainage guide is disposed at an interval h1 upstream from the tube axis of the lateral branch pipe, and the second drainage guide. Is disposed at a distance h2 downstream, a third drainage guide is disposed at a distance h3 with respect to the second drainage guide, and the distances h1 and h2 are 1.4D to 1 with respect to the pipe diameter D of the vertical pipe. A drainage pipe joint which is set within a range of .8D and the interval h3 is set within a range of 0.8D to 1.0D with respect to the pipe diameter D of the vertical pipe.

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