JP2004169538A - Pipe joint for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint for drainage of an excellent drain performance without flowing discharged water into a horizontal branch pipe, has a simple configuration and is easy to be manufactured. <P>SOLUTION: The pipe joint for drainage includes an upper and a lower opening connection part for connecting a drain vertical pipe, a cylindrical part with a diameter larger than that of the drain vertical pipe to be connected to the lower part of the upper opening connection part, a tapered-pipe part with a diameter reduced downward connecting to the lower opening connection part at the lower part of the cylindrical part and at least one opening of the horizontal branch pipe on the side part of the cylindrical part. Furthermore, an inclined plate tilting against an pipe axis to receive and whirl the discharged water flow in the vertical pipe and also a weir plate to prevent the discharged water flow whirled by the inclined plate from flowing into the horizontal branch pipe are provided on the inner side wall of the cylindrical part. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a drainage pipe joint, and more particularly to a drainage pipe joint suitably used for drainage stack pipes in drainage pipes of apartment houses, hotels, office buildings, and the like.

  Drainage pipe joints used for drainage stack pipes used in apartment houses generally include upper and lower opening connections for connecting drainage stacks, and a drainage stack connected to a lower portion of the upper opening connection. Also has a large-diameter cylindrical portion, a tapered cylindrical portion connected to the lower opening connecting portion while being reduced in diameter at a lower portion of the cylindrical portion, and at least one horizontal branch pipe connecting portion provided on a side portion of the cylindrical portion. In addition, the inner surface of the tapered cylindrical portion is provided with a swirl blade for draining while draining the drainage drainage flow drained through the drainpipe, if necessary.

  In recent years, various proposals have been made to improve the drainage performance and the like of the drainage pipe joint. For example, a drainage guide is provided above the branch pipe receiving port, and the same as the turning direction at the lower diameter reducing portion. There is disclosed a drainage pipe provided with a drift guide side that gives a turning force in a direction (for example, see Patent Document 1).

  In addition, a deflector plate for deflected the drainage flow is provided above the enlarged diameter chamber (corresponding to the cylindrical portion), and a plurality of swirling rectifying plates are protrudingly provided on the peripheral surface of the tapered chamber. There is disclosed a drainage pipe member in which a swirl flow plate for a drain flow flowing down from a large amount of protrusion is formed, and other swirl flow plates are formed with a small protrusion amount (for example, see Patent Document 2).

Further, below the horizontal branch pipe connection port of the main body portion (corresponding to the cylindrical portion), at least one first turning guide and at least one second turning guide projecting from the inner peripheral wall are provided, respectively. There is disclosed a drainage pipe joint in which a first turning guide and a second turning guide are provided asymmetrically opposed to a pipe axis (for example, see Patent Document 3).
JP-A-8-93021 Patent No. 2912827 JP-A-11-217859

  However, according to the study of the present inventor, in the pipe joint for drainage described in Patent Document 1, it is not always sufficient to secure an effective cross-sectional area for drainage to flow down. In order to prevent the inflow, it is necessary to increase the shape of the side wall of the drift guide. Therefore, there is a problem that the shape of the drift guide becomes complicated and manufacturing becomes difficult.

  Also, in the pipe fitting for drainage described in Patent Literature 2, it is necessary to provide a swirl flow rectifying plate at a position that accurately corresponds to the drainage flow deflected by the deflector plate in consideration of drainage conditions and the like. There is a problem that it is difficult to set the position of the current plate, and the position is limited, and the overall shape such as the size of the joint is greatly restricted, so that the manufacturing tends to be difficult.

  Furthermore, in the drainage collecting pipe joint described in Patent Document 3, two rotating blades are positioned below the horizontal branch pipe connection port from the cylindrical portion having a larger diameter than the drainage stack to the tapered cylindrical portion with respect to the pipe axis. However, since the swirling blades are facing each other and both are installed below the horizontal branch pipe connection port, the flow is affected by the interference of the swirling flow from each other and the flow is In addition to the problem that the turbulence affects the drainage performance, there are also problems such as the inability to install a sufficiently large swirl vane to prevent clogging with dirt due to the installation of the large swirl vane in the tapered cylinder. Was.

  An object of the present invention is to provide a drainage pipe which has excellent drainage performance without a drainage flow flowing into a horizontal branch pipe and has a simple shape and is easy to manufacture in view of the problems of the conventional drainage pipe joint. It is to provide a joint.

  The drainage pipe joint according to claim 1 (invention 1) is an upper and lower opening connecting portion for connecting a drainage stack, and a cylindrical portion having a larger diameter than the drainage stack connecting to a lower portion of the upper opening connecting portion. In a drainage pipe joint having a tapered tubular portion connected to a lower opening connecting portion while being reduced in diameter downward at a lower portion of the cylindrical portion, and at least one side branch pipe connecting portion provided on a side portion of the cylindrical portion, An inclined plate inclined with respect to a pipe axis for receiving and rotating the vertical stack drainage flow, and a baffle plate for preventing the drainage flow swirled by the inclined plate from flowing into the horizontal branch pipe connection portion. , Provided on the inner wall of the cylindrical portion.

  The drainage pipe joint according to claim 2 (invention 2) is the drainage pipe joint according to invention 1, wherein the upper end of each of the inclined plate and the damming plate is higher than the upper end of the horizontal branch pipe connection portion. The distance between the inclined plate and the dam plate at the position of the lower end of the inclined plate is set to 0 mm to 100 mm.

  The drainage pipe joint according to claim 3 (invention 3) is the drainage pipe joint according to invention 1 or 2, wherein both the upper ends of the inclined plate and the damming plate are the upper ends of the horizontal branch pipe connection portions. The height of the lower end of the dam plate is equal to or lower than the height of the lower end of the inclined plate.

  The drainage pipe joint according to claim 4 (invention 4) is the drainage pipe joint according to any one of inventions 1 to 3, which is received by the inclined plate below a lower end portion of the horizontal branch pipe connection portion. A swirl vane (A) is provided which is inclined in the same direction as the inclined plate with respect to a tube axis for receiving and rotating the stack drain water flow that has flowed down.

  The drainage pipe joint according to claim 5 (invention 5) is the drainage pipe joint according to invention 4, wherein the swirl vane (A) is provided below the lower end of the horizontal branch pipe connection portion with respect to the pipe axis. A swirl vane (B) is provided, which is inclined in the same direction and receives and rotates the drainage drainage water flowed down by the dam plate.

  The drainage pipe joint according to claim 6 (invention 6) is the drainage pipe joint according to any of inventions 4 and 5, wherein the swirl vane (A) has an angle of 20 to 45 ° with respect to a pipe axis. It is characterized by being provided in.

  The drainage pipe joint according to claim 7 (invention 7) is an upper and lower opening connecting portion for connecting a drainage stack, and a cylinder having a larger diameter than the drainage stacking tube connected to a lower portion of the upper opening connecting portion. Part, a tapered tubular part connected to the lower opening connecting part while being reduced in diameter at the lower part of the cylindrical part, and a drainage pipe joint having at least one side branch pipe connecting part provided on a side part of the cylindrical part. An inclined plate inclined on a pipe axis for receiving and rotating a standing-pipe drainage flow is provided on an inner surface of the cylindrical portion so that an upper end position thereof is higher than an upper end of the horizontal branch pipe connection portion. At a position lower than the lower end of the connecting portion, a swirl vane (A) is provided which is inclined in the same direction as the inclined plate with respect to a pipe axis for receiving and swirling a vertical drainage flow which has flowed down without being received by the inclined plate. Lower end of inclined plate and swirl vane The distance between the upper end of the A) is characterized in that there is a 50Mm～450mm.

  The drainage pipe joint according to claim 8 (invention 8) is the drainage pipe joint according to invention 7, wherein the standing pipe drainage flow that has flowed down by the damming plate is located at a position lower than the lower end of the horizontal branch pipe connection portion. A swirling blade (B) is provided which is inclined in the same direction as the swirling blade (A) with respect to a tube axis for receiving and turning.

  In the inventions 1 to 6, on the inner surface of the cylindrical portion having a diameter larger than that of the drain stack, an inclined plate inclined with respect to a pipe axis for receiving and turning the drain stack drain flow, and the drain flow swirled by the inclined plate. However, there is provided a dam plate for preventing flow into a horizontal branch pipe connecting portion provided on a side portion of the cylindrical portion. Further, in addition to the above, a swirling blade (A) or a swirling blade (B) may be provided below the inclined plate, the dam plate, or the horizontal branch pipe connection part.

  The upper end of each of the inclined plate and the dam plate is provided at a position higher than the upper end of the horizontal branch pipe connecting portion. Since the mounting position is above the upper end of the horizontal branch pipe connection, the sewage and the like flowing down from the upper standing pipe collides with the inclined plate and becomes a swirling flow, and the sewage and the like coming from the horizontal branch pipe enter the joint cylindrical section. It does not prevent the inflow.

  The distance between the inclined plate and the blocking plate at the higher position of the lower end of the inclined plate or the lower end of the blocking plate is 0 mm to 100 mm, and preferably about 20 mm to 80 mm. If the width is larger than 100 mm, the sewage or the like swirled by the inclined plate cannot be blocked by the blocking plate, and the flow of drainage may be disturbed, and the backflow to the horizontal branch pipe may occur.

  Note that this distance may be 0 mm, but in the case of 0 mm, the projecting length of the inclined plate or the damming plate at the location is reduced to 10 mm, for example, so that the projecting length at the location is reduced. It is good to make it below. If it protrudes further inside the joint, there is a risk that dirt and foreign matter in the sewage will be clogged.

  Usually, the inclination angle (hereinafter, also referred to as “installation angle”) with respect to the tube axis when the inclined plate is provided is set to 20 ° to 65 °. If the angle of the inclined plate is higher than 65 °, the sewage colliding with the inclined plate rebounds, and there is a high possibility of disturbing the flow, and the pressure fluctuation in the pipe may become too large. If the angle is less than 20 °, a sufficient swirling flow cannot be obtained, and the ratio of the projected area of the inclined plate to the cross-sectional area of the cylindrical portion does not fall within a predetermined range (described later) when viewed from above the joint. Fear also comes out.

  In addition, the installation angle of the dam plate is -30 ° to 20 ° from the vertical direction. If the installation angle is more than 20 °, there is a risk that the swirling flow swirled by the inclined plate will not be sufficiently blocked and a backflow to the horizontal branch pipe will occur. If the angle is more than -30 °, the rebound of the received water becomes large, which may disturb the flow, and the pressure fluctuation in the pipe may be increased.

  The height of the lower end of the blocking plate is equal to or lower than the height of the lower end of the inclined plate. In other words, if the height difference is reduced by about 0 mm to 150 mm, the sewage flow swirled by the inclined plate becomes a smooth flow without being disturbed between the damming plate and the inclined plate, and furthermore, the swirl flows. By catching the flow with the dam plate, the flow velocity of the downflow drainage can be decelerated while reducing the flow velocity of the downflow drainage, thereby exhibiting excellent drainage performance. In addition, since the inclined plate is installed on the large-diameter cylindrical portion, it is possible to install sufficiently large blades, and the drainage performance is further improved.

  In this case, the installation angle of the dam plate is -30 ° to 20 °. That is, since the installation angle of the inclined plate is 20 ° to 65 °, if the installation angle of the damming plate is in the above range, the inclined plate and the damming plate are formed as if they are V-shaped or y-shaped. Placed in

  A swirl vane (A) inclined with respect to a pipe axis for receiving and swirling a standing drain water flow that has flowed down without being received by the inclined plate below a lower end portion of the horizontal branch pipe connection portion, or the damming member. A swirl vane (B) inclined with respect to a pipe axis for receiving and swirling a stack drainage flow that has flowed down without being received by the plate is provided. Therefore, the effect of improving the drainage performance becomes more certain.

  The installation angle of the swirling blade (A) is provided at an angle of 20 ° to 45 °. If it is standing at more than 20 °, the vertical drainage flow that has flowed down without being received by the inclined plate will not be a sufficient swirling flow, and if it is more than 45 °, the sewage hitting the swirling blade (A) will rebound and flow. May be disturbed.

  The installation angle of the swirling blade (B) is provided at an angle of 20 ° to 65 °. If it is standing at more than 20 °, the drainage flowing down the drain stack that has not been received by the blocking plate will not be a sufficiently swirling flow, and if it is inclined at more than 65 °, sewage that will hit the swirling blade (B) Could bounce off and disrupt the flow.

  If the swirling blade (A) or the swirling blade (B) is installed at an excessively large angle, the drainage flow of the standing pipe impinges on the swirling blade (A) or the swirling blade (B), causing a large rebound. May be too large. Also, if the installation angle is too small, the projected area (sg) of the total of the swirl vanes (A) and the swirl vanes (B) with respect to the inner diameter cross-sectional area (S) of the drain stack will be described. In order to obtain the ratio (sg / S, hereinafter referred to as “projected area ratio”), it is necessary to lengthen the shape of the swirl vane (A) or the swirl vane (B), thereby increasing the vertical length of the joint. In addition to increasing the cost, the weight of the joint may be excessive. Therefore, the installation angle is preferably 20 ° to 45 ° for the swirling blade (A), and is preferably 20 ° to 65 ° for the swirling blade (B).

  Inner surface of drainage pipe joint of lower-end swivel blade of lower swirl blade (A) or swirl blade (B), for example, swirler blade (B) at lower end position The amount of protrusion to the side is set to be larger than the amount of protrusion of the swirling blade having a higher upper end position, for example, the swirling blade (A), to the inner surface side of the drainage pipe joint. Therefore, the sewage flowing down the drainage stack collides well with the swirl blade (A) and the swirl blade (B), and effectively becomes a swirl flow.

  The turning blade (A) and the turning blade (B) may be provided alone, but it is more preferable that both are provided because the effect of improving the turning force is ensured. .

  The ratio (sg / S) of the projected area (sg) of the total of the swirl vanes (A) and the swirl vanes (B) to the inner diameter cross-sectional area (S) of the drainage stack to the inner surface of the drainage stack is 0. .15 to 0.55.

  If the projected area ratio (sg / S) is too large than 0.55, clogging of foreign matters and the like contained in the drainage may easily occur. May be difficult to exhibit. In this case, in particular, in order to efficiently receive the standing pipe drainage flow that is not received by the inclined plate 6 and further apply the turning force, the projected area of the lower turning blade must be increased by increasing the projected area of the lower turning blade. It is preferable to make it larger than the projection area. In other words, this means that the amount of protrusion of the swirling blade (A) toward the inner surface side of the drainage fitting is greater than the amount of protrusion of the swirling blade (B) toward the inner surface side of the drainage fitting. I do.

  The inclined plate is provided at an installation angle of 20 ° to 65 ° with respect to the tube axis, and the inner diameter cross-sectional area (S) of the drainage stack and the projected area (sk) of the inclined plate with respect to the inner surface of the drainage stack. Is preferably 0.05 to 0.30.

  If the installation angle of the inclined plate is too small, the ratio (sk / S, hereinafter) of the projected area (sk) of the inclined plate to the inner surface of the drainage stack (sk) will be described. , Also referred to as “projected area ratio”), it is necessary to lengthen the shape of the inclined plate, which increases the length of the joint in the vertical direction, leading to an increase in cost and an excessive weight of the joint. Sometimes. For this reason, the projection area ratio is preferably 0.05 to 0.30, and the installation angle of the inclined plate is preferably 20 ° to 65 °.

  The distance between the inclined plate and the dam plate at the height position of the lower end of the inclined plate is set to 0 mm to 100 mm, and the upper end of the first swirling blade (A) is lower than the lower end of the horizontal branch pipe connecting portion. Preferably, it is provided at the position. When the upper end position of the swirling blade (A) is higher than the lower end position of the horizontal branch pipe connecting portion, the sewage that has collided with the swirling blade may go to the horizontal branch pipe side and obstruct the inflow of sewage from the horizontal branch pipe. Comes out.

  The drainage pipe joints of Inventions 7 and 8 have no damming plate used in the pipe joints of Inventions 1 to 6 described above.

  On the inner surface of the cylindrical portion, an inclined plate inclined with respect to a pipe axis for receiving and turning the drainage drainage flow is provided so that an upper end position is higher than an upper end of the horizontal branch pipe connection portion, and the horizontal branch pipe connection portion is provided. At a position lower than the lower end, there is provided a swirling blade (A) which is inclined in the same direction as the inclined plate with respect to a pipe axis for receiving and rotating a vertical drainage flow which has not flown down by the inclined plate. It is preferable that the distance between the lower end of the rotating blade (A) and the upper end of the turning blade (A) is 50 mm to 450 mm.

  Since there is no damming plate, the sewage flow swirled by the inclined plate directly hits the swirling blade (A), is further swirled by the swirling blade (A), and flows downward, thereby improving drainage performance. In this case, if the distance between the lower end of the inclined plate and the upper end of the swirling blade (A) is less than 50 mm, the swirling flow swirled by the inclined plate and the swirling flow by the swirling blade (A) interfere with each other. There is a risk that the flow will not be smooth. On the other hand, if it is larger than 450 mm, the swirling flow of the sewage swirled by the inclined plate is guided by the swirling blade (A), and the swirling is disturbed before the collision, and the swirling by the swirling blade (A) becomes insufficient. As a result, the swirling flow swirled by the inclined plate may be weakened and a sufficient swirling force may not be obtained. Further, the total length of the joint is increased, which leads to an increase in cost.

  In the eighth aspect, in addition to the drainage joint of the seventh aspect, a swivel is provided at a position lower than the lower end of the horizontal branch pipe connection portion with respect to a pipe axis for receiving and swirling the drainage flow drained by the boom plate. A swirling blade (B) inclined in the same direction as the blade (A) is provided. Therefore, the effect of improving the drainage performance becomes more certain.

  The swirling blade (A) is provided at an angle of 20 to 45 ° with respect to the tube axis. If it is standing at more than 20 °, the vertical drainage flow that has flowed down without being received by the inclined plate will not be a sufficient swirling flow, and if it is more than 45 °, the sewage hitting the swirling blade (A) will rebound and flow. May be disturbed.

  The turning blade (B) is provided at an angle of 20 to 65 ° with respect to the tube axis. If it is standing at more than 20 °, the drainage flowing down the drain stack that has not been received by the blocking plate will not be a sufficiently swirling flow, and if it is inclined at more than 65 °, sewage that will hit the swirling blade (B) Could bounce off and disrupt the flow.

  If the angle with respect to the pipe axis when providing the swirl blade (A) or the swirl blade (B) (hereinafter referred to as “installation angle”) is too large, the drainage flow of the vertical pipe will cause the swirl blade (A) or the swirl blade ( Bounce when hitting B) becomes large, and the pressure fluctuation in the pipe may become too large. Also, if the installation angle is too small, the projected area (sg) of the total of the swirl vanes (A) and the swirl vanes (B) with respect to the inner diameter cross-sectional area (S) of the drain stack will be described. In order to obtain the ratio (sg / S, hereinafter referred to as “projected area ratio”), it is necessary to lengthen the shape of the swirl vane (A) or the swirl vane (B), thereby increasing the vertical length of the joint. In addition to increasing the cost, the weight of the joint may be excessive. For this reason, the installation angle is preferably 20 ° to 405 ° in the swirling blade (A), and is preferably 20 ° to 65 ° in the swirling blade (B).

  Of the swirling blade (A) or the swirling blade (B), the protruding amount of the swirling blade having the lower upper end position, for example, the swirling blade (B), toward the inner surface of the drainage joint is determined by the swirling of the higher upper end position. The amount of the blade, for example, the swirling blade (A) projecting toward the inner surface side of the drainage pipe joint is set larger. Therefore, the sewage flowing down the drain stack collides well with the swirling blade (A) and the swirling blade (B), and effectively becomes a swirling flow.

  The turning blade (A) and the turning blade (B) may be provided alone, but it is more preferable that both are provided because the effect of improving the turning force is ensured. .

  The ratio (sg / S) of the projected area (sg) of the total of the swirl vanes (A) and the swirl vanes (B) to the inner diameter cross-sectional area (S) of the drainage stack with respect to the inner diameter surface of the drainage stack is 0. .15 to 0.55.

  If the projected area ratio (sg / S) is too large than 0.55, clogging of foreign matters and the like contained in the drainage may easily occur. May be difficult to exhibit. In this case, in particular, in order to efficiently receive the drainage drainage flow that has flowed down without being received by the inclined plate 6 and to further impart a turning force, the projected area of the turning blade (A) must be adjusted by changing the projected area of the turning blade (B). It is preferable to make it larger than the projection area. In other words, this means that the amount of protrusion of the swirling blade (A) toward the inner surface side of the drainage fitting is greater than the amount of protrusion of the swirling blade (B) toward the inner surface side of the drainage fitting. I do.

  The inclined plate is provided at an angle of 20 to 65 ° with respect to the pipe axis, and the ratio of the cross-sectional area (S) of the inner diameter of the drainage stack to the projected area (sk) of the inclined plate with respect to the inner surface of the drainage stack ( (sk / S) is set to 0.05 to 0.30.

  If the installation angle of the inclined plate is too large than 65 °, so-called rebound such as splashing of water when the drainage drainage stream hits the inclined plate becomes large, and the pressure fluctuation in the pipe may become too large. On the other hand, if the installation angle is smaller than 20 °, the ratio (sk / S, hereinafter referred to as “sk / S”) of the cross-sectional area of the inner diameter of the drainage stack (S) and the projected area of the inclined plate with respect to the inner diameter of the drainage stack. In order to ensure the projection area ratio), it is necessary to lengthen the shape of the inclined plate, which increases the length of the joint in the vertical direction, which leads to an increase in cost and an excessive weight of the joint. is there. For this reason, the projection area ratio is preferably 0.05 to 0.30, and the installation angle of the inclined plate is preferably 20 to 65 °.

  The drainage pipe joint according to the present invention is characterized in that an inclined plate inclined with respect to a pipe axis for receiving and turning a drainage drainage flow, and the drainage flow swirled by the inclined plate flows into the horizontal branch pipe connection portion. Since a damming plate for preventing water leakage is provided on the inner wall of the cylindrical portion, the drainage flow has excellent drainage performance without flowing into the horizontal branch pipe, and is easy to manufacture with a simple shape. Can be provided.

  In addition, even in the case where the swirl vanes (A) and the swirl vanes (B) for receiving, swirling, and descending the stack drainage flow that has flowed down without being received by the inclined plate are provided. Also, the installation positions of (B) and (B) need only be positions that correspond to the flow from the inclined plate, so that they can be arbitrarily set to some extent and the manufacturing becomes easy.

Hereinafter, the present invention will be described in detail with reference to the drawings.
As illustrated in FIG. 1, the drainage pipe joint of the present invention is connected to upper and lower opening connections 1 and 2 for connecting a drainage stack (not shown) and a lower portion of the upper opening connection 1. A cylindrical portion 3 having a diameter larger than that of the drainage stack, a tapered cylindrical portion 4 connected to a lower opening connecting portion while being reduced in diameter at a lower portion of the cylindrical portion 3, and provided on a side portion of the cylindrical portion 3. In the drainage joint having at least one horizontal branch pipe connection portion 5 provided, an inclined plate 6 inclined with respect to a pipe axis for receiving and rotating a drainage drainage flow, and drainage swirled by the inclined plate 6 A blocking plate 7 for preventing a flow from flowing into the horizontal branch pipe connecting portion 5 is provided on the inner wall of the cylindrical portion 3.

  If the installation angle of the inclined plate 6 is too large, so-called rebound such as splashing of water when the vertical drainage stream hits the inclined plate 6 becomes large, and the pressure fluctuation in the pipe may become too large. If the installation angle is too small, the ratio (sk / S, hereinafter referred to as “projection area”) of the inner diameter cross-sectional area (S) of the drainage stack to the projected area (sk) of the inclined plate 6 with respect to the inner surface of the drainage stack. (Also referred to as “ratio”), it is necessary to lengthen the shape of the inclined plate 6. Therefore, the length of the joint in the vertical direction is increased, leading to an increase in cost and an excessive weight of the joint. . Therefore, the projection area ratio is preferably 0.05 to 0.30, and the installation angle of the inclined plate is preferably 20 to 65 °.

  If the amount of the blocking plate 7 protruding toward the inner surface side of the drainage pipe joint is too small, it may be difficult to prevent the inflow of the drainage flow into the horizontal branch pipe connection portion 5, and if it is too large, it is included in the drainage. The thickness is preferably 10 to 40 mm because clogging of foreign matters and the like easily occurs.

  The ratio (ss / S, hereinafter referred to as “projected area ratio”) of the inner diameter cross-sectional area (S) of the drain stack to the projected area (ss) of the blocking plate 7 with respect to the inner surface of the drain stack is large. If it is too long, clogging of foreign matters and the like contained in the drainage is liable to occur. In addition, the bounce when the stack drainage stream hits the damming plate 7 becomes large, and the pressure fluctuation in the pipe may become too large. It is preferably 1 or less.

  When the tapered tube portion 4 is provided with a swirl vane (A) 8 inclined with respect to a tube axis for receiving and turning a vertical drainage flow that has flowed down without being received by the inclined plate 6, This is preferable in that the turning force of the drainage flow is improved.

  In addition, the tapered tubular portion 4 is provided with a swirl blade (B) 9 inclined with respect to a pipe axis for receiving and swirling a vertical drainage water flow that has flowed down without being received by the damming plate 7. This is preferable in that the swirling force of the drainage flow is improved as described above.

  The turning blade (A) 8 and the turning blade (B) 9 may be provided independently, but it is more preferable that both are provided because the effect of improving the turning force is ensured. .

If the angle with respect to the pipe axis (hereinafter referred to as “installation angle”) when the swirl vane (A) 8 or the swirl vane (B) 9 is provided is too large, the upright drainage flow may cause the swirl vane (A) 8 or The rebound when hitting the swirling blade (B) 9 becomes large, and the pressure fluctuation in the pipe may become too large. If the installation angle is too small, the projected area (sg) of the total of the swirl vanes (A) 8 and the swirl vanes (B) 9 with respect to the inner diameter cross-sectional area (S) of the drain stack against the inner surface of the drain stack. (Sg / S, hereinafter referred to as “projected area ratio”), it is necessary to lengthen the shape of the swirling vane (A) 8 or the swirling vane (B) 9. In addition to the lengthening of the joint, which leads to an increase in cost, the weight of the joint may be excessive.
For this reason, the installation angle is preferably 20 ° to 45 ° in the swirling blade (A) 8 and is preferably 20 ° to 65 ° in the swirling blade (B) 9.

  If the total projected area ratio (s / S) of the swirling blade (A) and the swirling blade (B) is too large, clogging of foreign matter or the like contained in drainage may easily occur. If it is too small, it may be difficult to exhibit the function of receiving and turning the drainage of the upright pipe, and thus it is difficult to exhibit the function.

  In this case, in particular, in order to efficiently receive the drainage drainage flow that has flowed down without being received by the inclined plate 6, and to further apply a turning force, the projected area of the lower turning blade at the upper end mounting position is increased. It is preferable to make the projection area larger than the projection area of the turning blade. This is not necessarily fixed, but in many cases, the amount of protrusion of the swirling blade (B) 9 toward the inner surface side of the drainage fitting is determined by the amount of the drainage fitting of the swirling blade (A) 8. It means that it is larger than the amount of protrusion to the inner surface side.

  Hereinafter, the present invention will be specifically described by showing Examples and Comparative Examples. The present invention is not limited only to the following examples.

  As Examples 1 to 3 and Comparative Examples 1 to 5, drainage pipe joints having the structure illustrated in FIG. 8 were manufactured according to the specifications shown in Table 1, and their performance was evaluated. The results of each evaluation are shown in Table 1.

  As Examples 4 and 5, drainage pipe joints having a structure as illustrated in FIG. 9 were manufactured according to the specifications shown in Table 1, and their performance was evaluated. The results of each evaluation are shown in Table 1.

  In the table, regarding the inflow prevention properties described in the performance evaluation column, ◎ indicates a state in which no occurrence is visually observed, 印 indicates a state in which there is a very small amount but no problem in practical use, and × indicates Indicates that a large amount of backflow has occurred. Regarding the productivity, 印 indicates that the production efficiency is 98% or more, ○ indicates that the production efficiency is 95% or more, and コ ス ト indicates the cost. Below, equivalent to the conventional, a circle indicates that the cost is increased by about 10% or less than the conventional. The clogging of the pipe with foreign matter is the result of visual observation.

  As is clear from Table 1, in the embodiment of the present invention, good performance in preventing inflow into the horizontal branch pipe, productivity and cost, small pressure fluctuation value, and no clogging of foreign matter is obtained. It turned out to show.

It is a schematic diagram which shows an example of the pipe fitting for drainage which has an inclined plate and a dam board, and does not have a turning blade. (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows an example of the drainage pipe joint in which the inclined board and the dam board contact or approach so that the lower end parts may become substantially V-shaped or y-shaped. (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows the example which the shape which an inclined plate and a damming plate make is substantially V-shaped or y-shaped. (A) Schematic diagram when the inclined plate and the dam plate are V-shaped and their lower ends are in contact with each other. (B) A schematic diagram in the case where the inclined plate and the dam plate are V-shaped and their lower ends are not in contact with each other. (C) A schematic diagram in the case where the inclined plate and the damming plate are in a Y-shape and the lower end of the inclined plate is in contact with the damming plate. It is a schematic diagram which shows an example of the pipe fitting for drainage which has an inclined board, a dam board, and a swirling blade (A). (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows an example of the pipe joint for drainage which has an inclined plate, a dam board, a turning blade (A), and a turning blade (B). (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows an example of the drainage pipe joint which has an inclined plate and a swirling blade (A), and has no damming plate. (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows an example of the pipe fitting for drainage which has an inclined plate, a swirling blade (A), and a swirling blade (B), and has no damming plate. (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. It is a schematic diagram which shows an example of the pipe joint for drainage which has an inclined plate, a dam board, a turning blade (A), and a turning blade (B). (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage. FIG. 9 is a schematic view showing another example of the drainage pipe joint of FIG. 8, in which three horizontal branch pipe connection portions are provided. (A) It is a top view in an example of the said pipe joint for drainage. (B) It is a side view in an example of the said pipe joint for drainage. (C) It is BB sectional drawing in an example of the said pipe joint for drainage. (D) It is AA sectional drawing in an example of the said pipe joint for drainage.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Upper opening connection part 2 Lower opening connection part 3 Cylindrical part 4 Tapered cylinder part 5 Horizontal branch pipe connection part 6 Inclined plate 7 Dam plate 8 Swirl vane (A)
9 swirl vane (B)

Claims (8)

An upper and lower opening connecting portion for connecting a drain stack, a cylindrical portion having a larger diameter than the drain stack connected to a lower portion of the upper opening connecting portion, and a diameter reduced to a lower portion of the cylindrical portion. A drain pipe joint composed of a tapered cylindrical portion connected to the lower opening connection portion and at least one mouthful horizontal branch pipe connection portion provided on a side portion of the cylindrical portion; An inclined plate inclined with respect to the pipe axis, and a damming plate for preventing a drain flow swirled by the inclined plate from flowing into the horizontal branch pipe connection portion are provided on the inner surface of the cylindrical portion. A pipe fitting for drainage characterized by the following. The upper end of each of the inclined plate and the damming plate is disposed at a position higher than the upper end of the horizontal branch pipe connection portion. At the position of the lower end of the inclined plate, the distance between the inclined plate and the damming plate is 0 mm to 100 mm. The drainage pipe joint according to claim 1, wherein: The upper end of each of the inclined plate and the dam plate is provided at a position higher than the upper end of the horizontal branch pipe connection portion, and the height of the lower end of the dam plate is equal to or lower than the height of the lower end of the inclined plate. The drainage pipe joint according to claim 1, wherein: A swirling blade (A) inclined in the same direction as the inclined plate with respect to a tube axis for receiving and rotating a standing drain water flow that has flowed down without being received by the inclined plate at a position lower than the lower end of the horizontal branch pipe connection portion. The drainage pipe joint according to any one of claims 1 to 3, wherein: A swirl vane (B), which is inclined at the same position as the swirl vane (A) with respect to the pipe axis and receives and drains the drainage of a standing pipe drained by the dam plate, at a position lower than the lower end of the horizontal branch pipe connection part. 5. The drainage pipe joint according to claim 4, wherein a) is provided. The distance between the inclined plate and the dam plate at the height position of the lower end of the inclined plate is from 0 mm to 100 mm, and the upper end of the swirling blade (A) is located at a position lower than the lower end of the horizontal branch pipe connecting portion. The drainage pipe joint according to any one of claims 4 and 5, wherein the pipe joint is provided in a pipe. An upper and lower opening connecting portion for connecting a drain stack, a cylindrical portion having a larger diameter than the drain stack connected to a lower portion of the upper opening connecting portion, and a lower portion which is reduced in diameter to a lower portion of the cylindrical portion and downward. In a drainage pipe joint having a tapered tubular portion connected to an opening connection portion and at least one horizontal branch pipe connection portion provided on a side portion of the cylindrical portion, a drainage flow of a standing pipe is received and turned on the inner surface of the cylindrical portion. An inclined plate inclined with respect to the pipe axis is provided so that the upper end position is higher than the upper end of the horizontal branch pipe connection portion, and is not received by the inclined plate at a position lower than the lower end of the horizontal branch pipe connection portion. A swirling blade (A) is provided which is inclined in the same direction as the inclined plate with respect to a tube axis for receiving and rotating the falling drainage drainage flow, and a lower end of the inclined plate and an upper end of the swirling blade (A) are provided. Distance is 50mm ~ 450 Drainage fitting, characterized in that there is a m. A swirl vane (B) inclined in the same direction as the swirl vane (A) with respect to a pipe axis for receiving and turning a drainpipe drainage flow that has flowed down by the blocking plate at a position lower than the lower end of the horizontal branch pipe connection part. The drainage pipe joint according to claim 7, wherein:

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