JP2011117133A - Junction pipe joint for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a junction pipe joint for drainage, which is slim, easy to install, having large draining capacity, manufactured at low cost with high manufacturing property, and manufactured also as a fireproof two-layer pipe joint with an inner pipe made of synthetic resin. <P>SOLUTION: The pipe joint 1 including vertical pipe connection ports 3 at upper and lower parts, and a branch pipe connection port 5 at an intermediate part 6, is adapted to form the upper and lower parts in straight cylinder shape and to provide swirl vanes one each in the pipe to give swirl to a flowing-down fluid. The intermediate part is formed as a large diameter part with an inner diameter slightly enlarged, and a short diameter reduced part 11 is formed at the lower end thereof. The branch pipe connection port is provided within a shade range of the upper swirl vane 9, and the lower swirl vane 10 is provided so that a position symmetrical by 180° to the shade range is a shade range. A guide protrusion 24 is protrusively provided above a region of the lower swirl vane. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a merging pipe joint for drainage installed in a building or a structure such as an apartment house, a hotel, or an office building.

  A drainage confluence pipe joint is usually embedded in a floor slab in the middle of a drainage vertical pipe that penetrates a high-rise building up and down, and a vertical pipe connection port to which a drainage vertical pipe is connected above and below the joint The middle part is provided with a branch pipe connection port to which a lateral branch pipe is connected. In addition, a swirl vane is provided inside the joint to swirl the drained water, thereby forming an air core for swirling the drainage and preventing fluctuations in the pipe pressure at the swivel center. There are also known methods that improve the performance. The swirl vane is usually provided at a position downstream of the branch pipe connection port, but it is also proposed to provide the swirl blade upstream of the branch pipe connection port to give a large swirling force to the drainage (Japanese Patent Laid-Open No. 9-100805). Publication).

  Moreover, the drainage from the vertical pipe and the drainage from the branch pipe connection port merge at the middle part of the joint where the branch pipe connection port is provided, so that the drainage tends to fill up. A large volume is required to avoid the situation. Since the joint is embedded in the through hole formed in the floor slab as described above, the smaller the diameter of the joint, the smaller the through hole and the easier the construction. Since it is formed to be larger than 50%, the through-holes are increased accordingly, which is inconvenient in construction. Further, when such an intermediate portion is enlarged, the inside of the pipe from the intermediate portion to the lower vertical pipe connection port is reduced in diameter to a long funnel, and the lower swirl vane is provided in this reduced diameter portion (special feature). (Kaihei 6-117000).

  Drainage that flows down from the vertical pipe connection port flows back to the branch pipe connection port, or when there are multiple branch pipe connection ports, the drainage from one branch pipe connection port is reflected by the inner wall of the pipe and enters the other branch pipe connection port. In order to prevent this, a backflow prevention plate extending in the length direction of the joint is projected on the pipe inner wall on both sides of the branch pipe connection port (Japanese Patent Laid-Open No. 9-310389). Publication (FIG. 1), Japanese Patent Laid-Open No. 2000-144838 (FIGS. 2 and 3)).

  As such merging pipe joints for drainage, a fireproof double-layer pipe joint in which an inner pipe made of a synthetic resin is coated with fiber-mixed mortar and a metal joint such as cast iron are commercially available.

Japanese Laid-Open Patent Publication No. 9-100705 JP-A-6-117000 Japanese Patent Laid-Open No. 9-310389 JP 2000-144838 A

Recently, buildings have become taller, and so drainage pipes are required to have improved drainage capacity so that they can drain on multiple floors. Increasing the diameter of the drainage vertical pipe and joint can increase the amount of drainage, but the material cost becomes expensive, and it is necessary to enlarge the through-hole formed in the floor slab to install the joint, which also increases the construction cost. Therefore, it is desirable to use a small diameter vertical pipe and a joint. However, the joint is provided with a branch pipe connection port, and the drainage flowing into this must also be drained by merging with the drainage of the vertical pipe, and in the small-diameter joint, swirl vanes are provided above and below the branch pipe connection port. Nevertheless, the air core disappears, the pressure in the pipe fluctuates, and the drainage capacity is reduced.
In the above-mentioned Patent Document 1, the portion where the swirl vane is provided and the intermediate portion where the branch pipe connection port is provided are configured to have the same diameter, and the slim shape is formed, but the drainage from the branch pipe connection port is the vertical pipe. In order to increase the flow rate when combined with the waste water, the opening of the branch pipe connection port that should be positioned slightly higher than the floor slab is expanded downward and the outer diameter is larger than the part where the swirl blades are provided Therefore, the through-hole of the floor slab has to be formed with a large opening, and there is not much merit of slimming from the viewpoint of construction work. In addition, since a gutter for preventing backflow is provided above the connection port, there is a disadvantage that the swirling of the drainage is hindered and the drainage capacity is reduced. Furthermore, since there is no margin for the combined flow rate in the middle part of Patent Document 1, the air core is reduced when the drainage flowing down the vertical pipe and the drainage from the side branch pipe merge, This causes pressure fluctuations and reduces drainage capacity.

  In the type in which the intermediate part of the joint is formed with a large diameter in preparation for merging as seen in Patent Document 2, it is generally provided in a tapered part that reduces the diameter of the swirl blade, and this configuration is efficient. In order to obtain a swirling flow, the swirling blades must be raised significantly to swirl the flow in the vicinity of the taper, or a plurality of swirling blades must be provided, which complicates the joint structure and impairs manufacturability. It is not preferable to increase it.

  The present invention eliminates such inconveniences, provides a drainage merging pipe joint having a slim outer diameter, being easy to install, having a relatively simple internal structure, and having a large drainage capacity, a metal joint or a synthetic resin. It is an object of the present invention to provide a drainage confluence pipe joint that can be manufactured as a fireproof double-layer pipe joint as an inner pipe and can be manufactured at low cost.

  In the present invention, in order to solve the above problems, a drainage junction pipe joint having a vertical pipe connection port at the top and bottom and a branch pipe connection port to which a horizontal branch pipe is connected to the middle part, which is more than the middle part The inner diameter of the lower part of the upper part and the lower part of the upper part and the intermediate part is formed in a straight cylinder shape, and the swirl blades are provided in an inclined state one by one on the pipe inner wall of each straight tube part to give swirl to the fluid flowing down the pipe. The inner diameter of the intermediate part is formed in a large diameter part that is slightly enlarged from near the upper position to the lower position of the branch pipe connection port, and is inclined so small that the flow along the inner wall of the pipe is not separated immediately upstream of each swirl vane. Each reduced diameter part is formed, the branch pipe connection port is located within the shaded range of the upper swirl vane, and the lower swirl vane is placed so that the approximately symmetrical position about 180 degrees with respect to this shaded range is the shaded range. I made it.

  A plurality of the branch pipe connection ports can be provided in a positional relationship rotated 90 degrees horizontally with respect to the central axis of the drainage confluence pipe joint, and the pipe inner wall located on both sides of the opening of the branch pipe connection port It is preferable to project a backflow prevention plate extending in the length direction of the joint. The height of the backflow prevention plate protruding from the inner wall of the tube in the axial direction of the joint is set to a height that does not protrude into the region of the inner diameter of the tube where the upper swirl vane is provided. Further, in order to improve manufacturability and drainage capacity, the plane shape of each swirl vane is formed in a semi-bow shape, and the vane surface is formed in a plane inclined also in the direction toward the inner wall of the pipe. The inner diameter of the straight cylindrical upper part provided with the upper swirl vane is formed to be substantially the same as the inner diameter of the lower cylindrical part provided with the lower swirl vane, and the inner diameter of the intermediate part is defined as the lower swirl vane. A slim and high drainage joint can be obtained by forming it approximately 20% or less larger than the inner diameter of the provided straight cylindrical lower part.

  A preferred configuration is a drainage merging pipe joint having a vertical pipe connection port at the top and bottom and a branch pipe connection port to which a horizontal branch pipe is connected at the middle part, which is higher than the middle part and more than the middle part. The inner diameter of the lower portion of the pipe is formed in a straight tube shape, and one swirl blade is provided on the inner wall of each straight tube portion to swirl the fluid flowing down in the pipe, in an inclined state, on both sides of the opening of the branch pipe connection port The inner wall of the pipe is provided with a backflow prevention plate projecting in the length direction of the joint, and the inner diameter of the upper part is formed to be substantially the same as the inner diameter of the lower part. Formed approximately 20% larger than the inner diameter of each part, and each of the swirl vanes is formed with a diameter-reduced portion that is small and slanted so that the flow along the inner wall of the pipe is not separated, and within the shaded range of the upper swirl vane. The branch pipe connection port is positioned at approximately 180 degrees with respect to this shaded range. The lower swirl vane is provided so that the nominal position is in the shaded range, and the upper and lower swirl vanes are planar with a semi-bow shape and the vane surface is inclined even toward the inner wall of the pipe. By doing so, the object of the present invention can be achieved accurately.

  The drainage merging pipe joint includes a vertical pipe connection port, a diameter-reduced portion, and a straight cylindrical upper joint member provided with an upper swirl vane, a branch pipe connection port, and a large portion into which the lower end portion of the upper joint member is fitted. An intermediate joint member formed in the diameter portion, a fitting joint at the lower end of the intermediate joint member, a straight tube portion having a funnel-shaped reduced diameter portion and a lower swirl blade, and a lower joint member having a vertical pipe connection port A small, large drainage capacity and good manufacturable joint can be obtained by assembling the assembly, and the drainage merging pipe joint is made of synthetic resin, and its outer periphery is covered with fiber-mixed mortar to provide two layers of fireproof It is also possible to use a pipe joint. When the opening portion of the branch pipe connection port is formed in a vertically long oval shape, a plurality of branch pipe connection ports having a large opening area can be provided on the same horizontal plane.

  The above-mentioned branch pipe is composed of two branch pipes having a positional relationship obtained by turning 90 ° horizontally, and guiding the flow along the inner wall of the pipe onto the lower swirl vane at a position corresponding to the area of the lower swirl vane By projecting the ridges, a large amount of drainage can be swung on the lower swirl vane, and an air core can be established in the joint to improve drainage capacity. If the guide ridge is provided on the inner wall of the pipe at a position slightly deviated in the direction opposite to the swirling direction of the drainage from the central position in the circumferential direction along the inner wall of the pipe in the shaded area of the lower swirling vane, the drainage capacity is further improved. Further improvement. Furthermore, the drainage capacity can be further improved by forming the inner diameter of the straight tube portion in a range where the swirl vanes in the lower portion are provided in a slightly funnel shape.

  In the joint according to the present invention, the waste water flowing in from the upper vertical pipe connection port is swirled by the upper swirl vane, and after passing through the intermediate portion provided with the branch pipe connection port, the swirl is again given by the lower swirl vane. Is discharged from the vertical pipe connection port to the vertical pipe, and the inner diameter of the intermediate portion is formed in a large diameter portion slightly enlarged from the vicinity of the upper position of the branch pipe connection port to the vicinity of the lower position, and immediately upstream of each swirl vane. Since the diameter-reduced portions that are so small that the flow along the inner wall of the pipe is not separated are formed on the side, the drainage from the upper vertical tube connection port is decelerated by the upper reduced-diameter portion and is moved to the tube wall. At the same time, it is collected by the upper swirling vanes and swirled, and in the intermediate part that has been enlarged in diameter, it spreads outward slightly due to the turning force and flows down to the reduced diameter part. The air is decelerated again by the section and flows along the inner wall of the pipe. Rests on round blade, is being swivel discharged from the vertical pipe connecting port below the vertical tube. In this case, since the drainage is decelerated at the upper diameter-reduced portion, the amount of drainage that travels along the pipe wall increases, and this can be swirled by the upper swirl vane as it is, so that the swirling effect of drainage is enhanced and the air core is formed. , Fluctuations in the pipe pressure are prevented. In addition, the intermediate part is somewhat larger than the upper part in order to prevent clogging in the pipe when the drainage from the branch pipe connection port merges, so that the swirled drainage diffuses by the turning force, and the middle pipe The lower diameter-reduced portion decelerates the flow and transmits the flow to the pipe inner wall of the straight cylindrical lower part, and the lower swirl vane is swirled again to lower the flow. The air core is discharged from the vertical pipe connection port to the vertical pipe, and an air core is formed in the lower pipe by swirling the drainage.

  Drainage flowing from the side branch pipe spreads along the slightly expanded middle pipe inner wall, and is decelerated by a small-diameter reduced diameter part so that the drainage does not spill into the center of the pipe and is guided to the lower swirl vane. Even a narrow swirl vane can efficiently generate a swirl flow along the tube wall. In other words, an air core for swirling the drainage from the side branch pipe to improve drainage capacity can be established. In addition, the drainage flowing down in the joint pipe is first given a turning force by the upper swirl blade, and the drainage speed is reduced through a reduced diameter portion with a gentle inclination angle that does not disturb the swirling state, Since it is decelerated, it is possible to effectively apply the turning force with the lower turning blade, and as a result, a good air core is formed by the high turning force, the pressure fluctuation in the pipe is reduced, and the drainage capacity is increased.

  Furthermore, because the branch pipe connection port is located within the shaded area of the upper swirl vane, even if there are multiple branch pipe connection ports, swirling drainage from the vertical pipe and drainage from the side branch pipe flow in simultaneously. In the merged state, the drainage of the vertical pipe interferes with the drainage flowing in from the side branch pipe located immediately below the upstream side of the swirl blade's water receiving surface only to about half or less of the branch pipe connection diameter. In addition, the drainage of the vertical pipe does not collide with the drainage flowing in from the lateral branch pipe located immediately below the water receiving surface. Therefore, the drainage from the horizontal branch pipe smoothly joins without destroying the swirling of the drainage from the vertical pipe, and the strength of the swirling force is maintained and the air core is established in the center of the pipe, so high drainage capacity is demonstrated. The When there is one branch pipe connection port, the swirl vane can sufficiently avoid the collision between the vertical pipe drainage and the horizontal branch pipe drainage, and the drainage capacity is improved.

  The lower swirl vane is provided so that the shadow range of the upper swirl vane and the 180 ° symmetrical position are within the shaded range. Because it is located on the opposite side of the mouth, it can receive much of the drainage from the side branch pipe that flows down along the inner wall of the opposite surface after traversing the inside of the pipe, and it gives swirling force to much of the drainage with the lower swirling blade The drainage capacity can be improved.

  Since a backflow prevention plate extending in the length direction of the drainage junction pipe joint is provided in the pipe on both sides of the branch pipe connection port, the drainage from the side branch pipe is opposite to the branch pipe connection port. However, the height of the backflow prevention plate does not protrude into the region of the inner diameter of the tube where the upper swirl vane is provided. Since the height of the tube does not protrude into the range of the swirling flow in the pipe, the swirling flow is prevented from being destroyed and the drainage capacity is improved. Further, the upper and lower swirl vanes are semi-arched and their blade surfaces are inclined toward the inner wall of the pipe, so that the drainage can be swirled along the inner wall of the pipe.

  According to the configuration of the present invention, it is possible to improve the drainage capacity by reducing the pipe diameter of the pipe joint as described above, and there is no protrusion other than the branch pipe connection port outside the pipe joint. The through-hole formed in the floor slab for embedding the pipe joint can also be made small, the piping work is facilitated, and the manufacturability is also provided because the swirl vane is provided in the upper part and the lower part respectively. Well, the entire pipe joint is small and light, and it is convenient and inexpensive to manufacture.

  The pipe joint of the present invention has a straight pipe-shaped upper joint member provided with a vertical pipe connection port, a reduced diameter portion and an upper swirl vane, and a large diameter provided with a branch pipe connection port and into which the lower end portion of the upper joint member is fitted. The intermediate joint member formed in the section, and a lower joint member having a fitting portion at the lower end of the intermediate joint member, a straight tube portion having a funnel-shaped reduced diameter portion and a lower swirl blade, and a vertical pipe connection port However, by assembling them, the pipe joint is configured, so that the manufacture becomes easier.

  The horizontal branch pipe is composed of two horizontal branch pipes having a positional relationship obtained by horizontally turning 90 °, and the flow along the inner wall of the pipe is guided onto the lower swirl vane at a position corresponding to the area of the lower swirl vane. By projecting the guide ridge, a large amount of drainage can be swirled by the lower swirl vane, so that the air core can be generated well and the drainage capacity can be further improved. In addition, by forming the inner diameter of the straight cylindrical portion in a range where the swirling blades in the lower part are provided in a slightly funnel shape, the generation of the air core is improved and the drainage capacity can be further improved.

Cut side view of an embodiment of the present invention FIG. 1 is an enlarged cut plan view taken along line 2-2 of FIG. Cutting plan view corresponding to FIG. 2 in the case of one side branch pipe Explanatory drawing of the inclined state of the blade surface of the swirl blade

  The embodiment of the present invention will be described in the case where the present invention is applied to a refractory double-layer pipe drain joint pipe joint in which a synthetic resin inner pipe is covered with fiber-mixed mortar. 1 and 2, reference numeral 1 includes vertical pipe connection ports 3 and 3 to which vertical pipes 2 and 2 are connected up and down, and two horizontal branch pipes 4 and 4 are connected to an intermediate portion 6 thereof. 1 shows a confluence pipe joint for drainage comprising branch pipe connection ports 5 and 5, wherein the pipe inner diameters of the upper part 7 and the lower part 8 with respect to the intermediate part 6 are formed in a straight cylinder shape having substantially the same diameter, and the pipe inner wall is half Each of the inclined swirl blades 9 and 10 each having an arcuate water receiving surface is provided to swirl the fluid flowing down the pipe. Such a configuration is also provided with a conventional drainage confluence pipe joint, but in the present invention, the large-diameter part in which the inner diameter of the intermediate part 6 is slightly enlarged from the vicinity of the upper part of the branch pipe connection port 5 to the vicinity of the lower part. And a small diameter-reduced portion 11 having a small slope for slowing down the drainage is formed immediately upstream of the swirl vanes 9 and 10. The diameter-reduced portion 11 acts so as to suppress the flow traveling along the inner wall of the pipe from being separated from the inner wall. Further, the branch pipe connection ports 5 and 5 are positioned within the semi-bow-shaped shadow range of the upper swirl vane 9, and the lower swirl blade 10 is provided so that this shadow range and the 180 ° symmetrical position become the shadow range. I made it. Furthermore, a backflow prevention plate 13 extending in the length direction of the pipe joint is provided on the pipe inner wall 15 located on both sides of the opening of the branch pipe connection port 5. The backflow prevention plate 13 serves to prevent drainage from interfering with each other and backflow to the side branch pipe 4 without drainage.

  When a plurality of branch pipe connection ports 5 are provided, as shown in FIG. 2, the axial center 12 of each branch pipe connection port is rotated by 90 degrees with respect to the central axis of the merging pipe joint 1. It is preferable to provide this, so that the interference between the waste water flowing from the side branch pipes 4 is alleviated.

  The plane shape of the swirling blades 9 and 10 provided at the top and bottom is a semi-bow shape, and the blade surface 14 is inclined from one end to the other end so as to generate, for example, a left swirling flow. Further, as shown in FIG. The vertical pipe drainage is formed on a flat water receiving surface 16 having an inclination angle 17 of about 10 degrees from the horizontal even when facing 15, so that the received vertical pipe drainage can be reliably converted into a swirling flow along the pipe inner wall 15.

  The protruding end of the backflow prevention plate 13 protrudes to the extent that it does not violate the region of the projection surface of the inner diameter of the tube where the upper swirl vane 9 is provided. With this configuration, the vertical end swirling along the inner wall 15 of the tube. It is possible to prevent the branch pipe drainage from one side branch pipe 4 from flowing back to the other side branch pipe 4 without disturbing the pipe drainage.

  By forming the inner diameter dimension of the upper portion 7 and the inner diameter dimension of the lower portion 8 to be substantially the same diameter, the waste water flowing from the side branch pipe 4 is transmitted through the inner wall, and the formation of the air core is ensured. Similarly, drainage flows from the side branch pipe 4 by forming the inner diameter of the intermediate portion 6 to be about 20% or less larger than the inner diameter of the straight cylindrical lower portion 8 provided with the lower swirl vanes 10. The formation of the air core at certain times is ensured. In addition, by forming the inner diameter of the lower portion 8 in the range where the swirling blades 10 are provided in a funnel shape that is slightly reduced in diameter, for example, about 4%, the drainage can further easily flow down the inner wall and drainage performance. Will improve.

  The drainage merging pipe joint 1 of the present invention includes a straight pipe-shaped upper joint member 18 provided with a vertical pipe connection port 3 and an upper swirl vane 9, a branch pipe connection port 5, and the lower end portion of the upper joint member 18 is An intermediate joint member 19 formed in the large-diameter portion to be inserted, a funnel-shaped reduced-diameter portion 11 into which the lower end portion of the intermediate joint member 19 is inserted, and a straight tube portion and a vertical pipe connection provided with the lower swirl blade 10 If it divides | segments into the lower joint member 20 which has the opening | mouth 3, manufacture will become easy. Then, these members are molded from a synthetic resin, assembled, and then coated on the outer periphery with fiber-mixed mortar 21, whereby a fireproof two-layer drainage collective pipe joint having a high drainage capacity is obtained. Reference numeral 22 denotes a rubber packing provided in the upper vertical pipe connection port 3. In addition, if the shape of the opening part which the branch pipe connection port 5 opens in the intermediate part 5 is formed in a vertically long ellipse, the pipe wall of the adjacent branch pipe connection port 5 does not approach, and the intermediate part 6 having a small diameter is formed. A plurality of relatively thick side branch pipes 4 can be easily attached.

  When the two horizontal branch pipes 4 having a positional relationship of 90 ° horizontal swirling are provided as the horizontal branch pipes 4, the vertically long guide ridges 24 extending in the tube axis direction at positions corresponding to the regions of the lower swirling blades 10 are provided. This guide ridge 24 allows most of the flow along the inner wall of the pipe to be guided onto the lower swirl blade 10 and improves the swirl force of the drainage, so that the pressure fluctuation in the pipe is changed. It becomes smaller and drainage capacity improves. The guide ridge 24 is provided on the pipe inner wall at a position 25 slightly deviated in the direction opposite to the swirling direction 26 of the drainage from the central position in the circumferential direction along the pipe inner wall in the shaded area of the lower swirl vane. Also good. Further, as shown in FIG. 1, the guide ridge 24 is preferably provided at a position below the center of the opening of the side branch pipe 4, and the side shape of the guide ridge 24 is shown in FIG. If it forms in a trapezoid shape by the plate body shown, the impact by drainage will decrease, the vibration will be relaxed, and the durability of the guide ridge 24 will increase.

  FIG. 3 shows an embodiment in which there is one branch pipe connection port 5. Also in this case, by providing the backflow prevention plates 13 on both sides of the opening of the branch pipe connection port 5, the branch pipe drainage becomes difficult to diffuse in the pipe, and the collision with the swirling vertical pipe drainage is reduced. The drainage capacity is improved.

  Explaining the operation of the illustrated embodiment, when drainage from the upper floor flows in from the upper vertical pipe connection port 3, a swirl force is sequentially given by the upper swirl blade 9 and the lower swirl blade 10, and in the pipe Since there is nothing obstructing the swirling, it does not collide too much with the reduced diameter portion 11 and efficiently flows along the inner wall of the tube and flows out from the lower vertical tube connection port 3. Is formed and the pressure fluctuation in the pipe can be suppressed, so that a high drainage capacity is exhibited.

  When the branch pipe drainage flows from one horizontal branch pipe 4 into such drainage, the branch pipe connection port 5 is provided in the upper shaded range, so that the branch pipe connection diameter is about half or less of the branch pipe connection diameter. It will be in the state which does not interfere or collide, and joins without destroying swirling of the drainage from a vertical pipe. As a result, the strength of the turning force is maintained and a high drainage capacity is exhibited. Further, the lower swirl vane 10 is provided in a symmetrical position with the upper swirl vane 9, so that it traverses the inside of the pipe and flows down along the inner wall of the opposing surface in addition to the swirling vertical pipe drainage. The drainage from the branch pipe 4 is also received and a turning force can be applied, and the drainage capacity at the time of merging is enhanced. Further, since the backflow prevention plate 13 and the guide ridge 24 prevent the diffusion of the branch pipe drainage and restrict the reflected flow reflected by the pipe inner wall, the branch pipe drainage is guided downward along the pipe inner wall, and the air core or swirl flow Less damage.

  The drainage capacity of the upper and lower straight cylinders designed to have an inner diameter of 100 mm, an inner diameter of 120 mm, branch pipe connection ports 5 and 5 of 77 mm, and a total length of 617 mm was 7.5 liters / second. It was. In the prior art, the drainage capacity at this inner diameter was 6.5 liters / second, so the performance was greatly improved, and the drainage capacity was greatly slimmed down.

  In the above description, the synthetic resin joint 1 covered with the fiber-containing mortar 21 has been described. However, the present invention is not limited to this, and the same effect as described above can be obtained even if the joint 1 is made of a metal such as a casting. In addition, although the vertical pipe connection port 3 and the branch pipe connection port 5 are configured to have a port shape, these may be configured as a male connection port. Furthermore, it is possible to attach a rubber packing to the branch pipe connection port 5 as well.

  DESCRIPTION OF SYMBOLS 1 Joint pipe joint for drainage, 3 Vertical pipe connection port, 5 Branch pipe connection port, 6 Middle part, 7 Upper part, 8 Lower part, 9/10 Swirling blade, 11 Reduced diameter part, 12 Shaft center, 13 Backflow prevention plate , 14 Blade surface, 15 Pipe inner wall, 17 Inclination angle, 18 Upper joint member, 19 Middle joint member, 20 Lower joint member, 21 Fiber mixed mortar, 24 Induction ridge, 25 Deflection, 26 Turning direction,

Claims (14)

  A drainage merging pipe joint having a vertical pipe connection port at the top and bottom and a branch pipe connection port to which a horizontal branch pipe is connected at the middle part, and a pipe at an upper part from the middle part and a lower part from the middle part An inner diameter is formed in a straight cylinder shape, and a swirl blade is provided on the inner wall of each straight tube portion so as to swirl the fluid flowing down the tube, and the inner diameter of the intermediate portion is set to the branch pipe connection port. It is formed in a large diameter part slightly enlarged from near the upper position to near the lower position, and a small diameter inclined part is formed on the upstream side of each swirl vane so that the flow along the inner wall of the pipe is not separated, and the upper swirl A junction pipe for drainage in which a branch pipe connection port is located within the shaded area of the blades, and a swirl vane below is provided so that a substantially symmetrical position of about 180 degrees with respect to the shaded area is within the shaded area. Fittings.   The drainage merging pipe joint according to claim 1, wherein a plurality of branch pipe connection ports are provided in a positional relationship of 90 degrees horizontally swiveling with respect to the central axis of the drainage merging pipe joint. The drainage merge pipe joint according to claim 1, wherein a backflow prevention plate extending in a length direction of the joint is provided on the pipe inner wall located on both sides of the opening of the branch pipe connection port.   The protruding height in the axial direction of the joint from the inner wall of the backflow prevention plate is a height that does not protrude into the region of the inner diameter of the tube where the upper swirl vane is provided. The junction pipe joint for drainage as described in 3.   2. The drainage confluence pipe joint according to claim 1, wherein the plane shape of each swirl blade is a semi-bow shape, and the blade surface is formed in a plane inclined in a direction toward the inner wall of the pipe.   2. The drainage according to claim 1, wherein an inner diameter of the upper part of the straight cylinder provided with the upper swirl vane is substantially the same as an inner diameter of the lower part of the straight cylinder provided with the lower swirl vane. Confluence pipe fittings.   2. The drainage confluence pipe joint according to claim 1, wherein an inner diameter of the intermediate portion is formed to be about 20% or less larger than an inner diameter of a straight cylindrical lower portion provided with a lower swirl vane.   A drainage merging pipe joint having a vertical pipe connection port at the top and bottom and a branch pipe connection port to which a horizontal branch pipe is connected at the middle part, and a pipe at an upper part from the middle part and a lower part from the middle part Inside the pipe located on both sides of the opening of the branch pipe connection port, the inside diameter of the straight pipe part is provided in the pipe inner wall of each straight pipe part so as to incline the swirl blades for turning the fluid flowing down the pipe. In the case where a backflow prevention plate extending in the length direction of the joint is provided on the wall, the inner diameter of the upper part is formed to be substantially the same as the inner diameter of the lower part, and the inner diameter of the intermediate part is made larger than the inner diameter of the lower part. Is formed approximately 20% larger, and each of the swirl vanes is formed with a diameter-reduced portion that is slanted so that the flow along the inner wall of the tube is not separated, and is connected to the branch pipe within the shaded area of the upper swirl vane. The mouth is positioned, and a substantially symmetrical position around 180 degrees with respect to this shadow range is a shadow range. The swirl vanes of the lower disposed so that, above and below the drainage merging pipe joint swirl vanes planar shape, characterized in that the tilted even towards the blade surface in the tube wall at small bow-shaped.   The drainage merging pipe joint includes a vertical pipe connection port, a diameter-reduced portion, and a straight cylindrical upper joint member provided with an upper swirl vane, a branch pipe connection port, and a large portion into which the lower end portion of the upper joint member is fitted. An intermediate joint member formed in the diameter portion, a fitting joint at the lower end of the intermediate joint member, a straight tube portion having a funnel-shaped reduced diameter portion and a lower swirl blade, and a lower joint member having a vertical pipe connection port 9. The drainage junction pipe joint according to claim 1 or 8, wherein the joint pipe joint is constructed to be assembled.   9. The drainage merging pipe joint according to claim 1 or 8, wherein the drainage merging pipe joint is made of a synthetic resin and the outer periphery thereof is covered with a fiber-mixed mortar. The drain joint pipe fitting according to claim 2, wherein the opening of the branch pipe connection port is formed in a vertically long oval shape.   The horizontal branch pipe is composed of two horizontal branch pipes having a positional relationship obtained by horizontally turning 90 °, and the flow along the inner wall of the pipe is guided onto the lower rotary blade at a position corresponding to the area of the lower rotary blade. The joint pipe joint for drainage according to claim 1 or 8, characterized in that a guiding ridge for projecting is provided.   The guide ridge is provided on the pipe inner wall at a position slightly deviated in the direction opposite to the swirling direction of the drainage from the central position in the circumferential direction along the pipe inner wall in the shaded range of the lower swirl vane. The junction pipe joint for drainage according to claim 12.   9. The drainage merging pipe joint according to claim 1 or 8, wherein an inner diameter of the straight cylindrical portion in a range where the swirl vanes in the lower portion are provided is formed in a slightly funnel shape.

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