JPH0819708B2 - Collective pipe fitting - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a collective pipe joint used by being connected to a vertical pipe for drainage provided in a building such as a middle-rise building or a high-rise building, and a branch pipe, and More specifically, the present invention relates to a collecting pipe joint that prevents the water sealing effect of a drain trap from being impaired by ensuring ventilation in the drain pipe.

(Prior Art) For example, drainage pipes attached to middle- and high-rise buildings are
Conventionally, as shown in FIG. 9, a vertical pipe 20 arranged vertically so as to pass through each floor, a branch pipe 30 horizontally arranged at each floor, the vertical pipe 20 and the vertical pipe 20. It is composed of a collecting pipe joint 60 to which the branch pipe 30 is connected.

The conventional collecting pipe joint 60 has an inflow pipe 65 connected to the upper standing pipe 20 and a large diameter in which a lower part of the inflow pipe 65 is housed so that drainage flows through the inflow pipe 65. It has a portion 61 and a water collecting portion 62 that is connected to the lower end of the large diameter portion 61 and has a reduced diameter at the lower end. The lower standing pipe 20 is connected to the lower end of the water collecting portion 62. The large diameter portion 61 has a cylindrical shape,
The water collecting portion 62 connected to the large diameter portion 61 is formed in a funnel shape having a circular cross section whose diameter is gradually reduced toward the lower portion. A pair of branch pipe connecting portions 63 and 63 are arranged on the upper portion of the large-diameter portion 61 so as to project outward, and the branch pipe connecting portions 63 are connected to the branch pipes 30. Are connected respectively.

The wastewater that has flowed into the large-diameter portion 61 from the inflow cylinder 65 flows down along the inner peripheral surfaces of the large-diameter portion 61 and the water collecting portion 62, and the wastewater that flows through the branch pipe 30 is the branch pipe connecting portion 63. And flows into the large-diameter portion 61 through the water, and these wastewaters are collected in the water collecting portion 62. The wastewater collected in the water collecting section 62 in this way is collected in the water collecting section 62.
It passes through the drainage port 62a at the lower end and flows into the lower standing pipe 20.

In the conventional collecting pipe joint 60 having such a configuration, when a large amount of wastewater is intensively flowed in from the vertical pipe 20 and each branch pipe 30, the wastewater collides with the lower inner peripheral surface of the water collecting portion 62 and bounces off, A phenomenon occurs in which the bounced drainage rises along the inner peripheral surface on the opposite side beyond the drainage port 62a without flowing down into the drainage port 62a due to its force. Therefore, once the drain port
There is a risk that the drainage that rises up the inner peripheral surface beyond 62a and the drainage that flows down along the inner peripheral surface of the water collecting portion 62 may merge at the lower end portion of the water collecting portion 62 to temporarily block the drainage port 62a. is there.

As described above, the drainage port 62a of the collecting pipe joint 60 is temporarily closed, so that the standing pipe 20 and the branch pipe connected to the collecting pipe joint 60 arranged in the building and in the communication state are connected. 30
When the drainage pipe configured by the above is temporarily blocked by drainage, the air layer in the drainage pipe cannot communicate with the upper and lower sides. Then, in this state, when the drainage in the water collecting portion 62 of the collecting pipe joint 60 flows down into the lower standing pipe 20, the inside of the drainage pipe on the upstream side of the collecting pipe joint 60 becomes a negative pressure temporarily. Become. As a result, the traps of various sanitary kitchen devices connected to each branch pipe 30 may be broken, and the malodor in the drain pipe may flow back into each room or the like. Further, since the drainage flowing down the vertical pipe 20 has a high flow velocity on the lowermost floor, there is a risk of causing a jumping phenomenon at the bent portion of the drainage pipe on the lowermost floor to block the pipe. This also causes a negative pressure in the vertical pipe 20, which may cause the trap to break.

In order to solve such a problem, conventionally, a swirling force is applied to the drainage flowing down to form a swirling flow, and an air core is formed at the axial center portion of the drainage, so that the drainage port in the water collecting portion is drained. Various types of collecting pipe joints have been proposed that are not blocked by the. For example, JP-B-53-32614, JP-B-57-49798, JP-A-62-288795, etc.,
Disclosed is a collecting pipe joint in which a spiral blade is projectingly provided on the inner surface of the lower part of the inflow pipe, and in such a collecting pipe joint, drainage flowing from the standpipe into the inflow pipe is distributed in the inflow pipe. The provided vanes form a swirling flow into the water collecting portion, maintain the swirling state, and flow out from the drain port of the water collecting portion, so that the drain port is prevented from being blocked by drainage.

(Problems to be solved by the invention) However, when the blade body is arranged in the relatively small-diameter inflow cylinder that allows the drainage to flow down into the water collecting portion, the state in which the blade body protrudes from the inner surface of the inflow cylinder is obtained. There is a risk that dust, fiber scraps, and the like contained in the wastewater will be caught and accumulated on the blade body, and the inflow cylinder will be clogged with the fiber scraps and the like. Further, since the drainage impinges on the blade body vigorously, there is a drawback that an impact sound is generated here. Further, since it is necessary to provide a blade body having a complicated shape on the inner surface of the inflow cylinder having a small diameter, there is a drawback that the manufacturing is not easy and the economical efficiency is impaired.

The present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a strong swirling force to drainage, so that the drainage reliably becomes a swirling flow, and a standing pipe to be connected is provided. It is an object of the present invention to provide a collective pipe joint capable of preventing a large negative pressure from being generated in a drainage pipe such as a branch pipe and a branch pipe, and preventing a water sealing effect of a drainage trap from being impaired. Another object of the present invention is to provide a collecting pipe joint that can be stably used for a long period of time without the possibility that fiber waste or the like will be clogged inside the inflow cylinder. Still another object of the present invention is to
It is an object of the present invention to provide a collecting pipe joint which can reduce noise due to drainage flowing inside and can be manufactured at a relatively low cost because it is easy to manufacture.

(Means for Solving the Problem) A collecting pipe joint of the present invention is a collecting pipe joint connected to a vertically arranged standing pipe and a horizontally arranged branch pipe, respectively. A large diameter portion provided with a branch pipe connecting portion to which a pipe is connected, and a lower portion inside the large diameter portion so that drainage that is connected to an upper standing pipe and flows through the standing pipe flows into the large diameter portion. And a large-diameter inflow cylinder in which the diameter is gradually increased as the lower part is on the lower side, and the blade body is arranged on the inner surface in a state of being inclined with respect to the axis thereof. A water collecting portion that is continuously provided at the lower end of the portion, has a diameter that gradually decreases toward the lower side, and has a guide means that swirls the drainage flowing down along the inner surface. The means is inclined along the inner circumferential surface of the water collecting portion having a circular cross section in the same circumferential direction as the blade body arranged in the inflow cylinder with respect to the axis of the water collecting portion. The side surfaces of the polygonal water collecting portion that is twisted in the same circumferential direction as the blade body disposed in the inflow cylinder as it goes downward, By doing so, the above object is achieved.

(Example) Hereinafter, the present invention will be described with reference to Examples.

As shown in FIG. 1 and FIG. 2, the collecting pipe joint of the first embodiment of the present invention has a vertical pipe 20 vertically arranged in a building of a plurality of floors, and a horizontal pipe along each floor of the building. It is used by being connected to a branch pipe 30 which is arranged in a shape. The collecting pipe joint 10 is
An inflow cylinder 13 connected to the upper standing pipe 20 and into which wastewater flows in, and a lower part of the inflow cylinder 13 are housed inside, and a pair of branch pipe connecting portions 14 and 14 are provided. It has a cylindrical large-diameter portion 11 and a water collecting portion 12 integrally connected to the lower end of the large-diameter portion 11.

The large-diameter portion 11 has a cylindrical side surface portion 11b and an upper surface portion 11a that covers an upper end surface of the side surface portion 11b, and the side surface portion 11b faces each other horizontally outward. A pair of projecting branch pipe connecting portions 14 and 14 are provided. Each branch pipe connection 14
The branch pipes 30 that are horizontally arranged in the building are connected to these. At the center of the upper surface portion 11a of the large-diameter portion 11, the through hole 11c
Is formed, and the inflow cylinder 13 is fitted into the through hole 11c. The lower portion 13a of the inflow cylinder 13 is housed in the large diameter portion 11, and the upper portion 13b is located above the upper surface portion 11a of the large diameter portion 11.

The inflow tube 13 has a cylindrical shape with a perfect circular cross section, and has an upper portion 13b.
A receiving port is formed in which the upper standing pipe 20 is fitted,
The lower end of the upper pipe 20 is fitted in the upper portion 13b. The lower portion 13a accommodated in the large diameter portion 11 of the inflow cylinder 13 is gradually increased in diameter toward the lower side, as shown in FIG. In the lower portion 13a of the inflow cylinder 13, the diameter of the expanded lower end is set to about 1.1 to 2.0 times the diameter of the unexpanded portion.

In the inflow pipe 13, to the inner peripheral surface of the lower portion 13a which is gradually expanded in diameter toward the lower side, in order to impart a swirling force to the drainage flowing down along the inner peripheral surface, with respect to the axial center of the inflow pipe 13. For example, four blade pairs 13d in an inclined state are arranged at equal intervals in the circumferential direction. The upper end of the inwardly projecting tip edge of each blade 13d is flush with the inner peripheral surface of the portion of the inflow tube 13 where the diameter is not expanded, and each blade 13d projects inward. The quantity gradually decreases as it goes up. Therefore, the inwardly protruding tip edge of each blade 13d does not protrude inward from the smallest inner diameter portion of the inflow cylinder 13.

As shown in FIGS. 3 (b) and 3 (c), the water collecting portion 12 connected to the lower end of the large-diameter portion 11 has a hexagonal cross section, and the diameter thereof is gradually reduced toward the lower side. As described above, the width dimension of each of the six side surfaces 12b becomes smaller as it goes downward. Moreover, the water collecting portion 12 is twisted in the same circumferential direction as the blade body 13d arranged in the inflow cylinder 13 as it goes downward, and each side surface 12b spirally extends. . A drain port 12a is formed at the lower end of the water collecting section 12. Then, a vertical standing pipe connecting portion 15 is continuously provided at the lower end of the drainage port 12a, and the upper end portion of the standing pipe 20 disposed below is externally fitted to the standing pipe connecting portion 15. It

It is in a state of being twisted in the same circumferential direction as the blade body 13d arranged in the inflow cylinder 13 with respect to the axis of the water collecting portion 12. Then, every other one in each corner portion 12c, the blade bodies 12d protruding inward are arranged in a state of being inclined in the same inclination direction as the blade bodies 13d arranged in the inflow cylinder 13 along each corner portion 12c. It is set up. Each blade 12d is in a state of projecting into the water collecting portion 12, but the amount of projection is gradually decreasing toward the lower side, and the lower end thereof is the inner peripheral surface of the drainage port 12a. Is flush with. Each blade 12d has its tip at the upper end of the water collecting portion 12 and its tip at the drain port 12 at the lower end of the water collecting portion 12.
It does not project inward from the peripheral position of a. Therefore,
The entire blade body 12d does not protrude inward from the inner peripheral surface of the drainage port 12a.

In the water collecting portion 12 in a state of being twisted in the circumferential direction, the twist angle between the upper end and the lower end is not limited, but for example, it can be set to about 30 to 90 degrees, and in this embodiment, As shown in FIG. 2, it is twisted about 45 degrees. Further, the drainage from the inflow tube 13 is the large diameter portion 11 and the water collecting portion 12
The lower end of the inflow cylinder 13 is so arranged as to flow down toward the inner peripheral surface.
It is preferable to set the position below the position where the branch pipe connecting portion 14 is arranged and above the upper end of the water collecting portion 12.

Next, the operation of the thus constructed collecting pipe joint 10 will be described.

When the drainage flowing into the inflow cylinder 13 flows down in the lower portion 13a whose diameter is gradually increased toward the lower side, a swirling force is given by each blade body 13d arranged on the inner peripheral surface of the lower portion 13a. Is turned into a swirling flow, and in the state where the swirling state is maintained, the lower part 13
a It is radially diffused from the lower end and flows into the water collecting part 12. Thereby, the drainage discharged from the inflow cylinder 13 collides with the inner peripheral surface of the large diameter portion 11 or the inner surface of the water collecting portion 12, and the drainage is applied to the spirally curved side surfaces 12b of the water collecting portion 12. It is guided and a turning force is applied. At this time, the drainage guided to each side surface 12b is guided to the blade body 12d arranged at a predetermined corner portion 12c between the side surfaces 12b, so that the turning force is further strengthened. Each blade 12d regulates the drainage that tends to spread outward due to the centrifugal force, and makes a predetermined swirl flow without disturbing the drainage. Further, the wastewater flowing from each branch pipe 30 into the large diameter portion 11 through the branch pipe connecting portion 14 collides with the lower portion 13a of the inflow tube 13 and thus becomes lower as the inflow tube 13 becomes lower. It is guided to the outer peripheral surface of the lower portion 13a of which the diameter is gradually increased, radially diffused toward the inner peripheral surface of the water collecting portion 12, and flows into the water collecting portion 12. Then, together with the drainage flowing from the vertical pipe 20, the swirl flow is generated as described above. At this time, the drainage flowing in from the branch pipe 30 is changed in its flow direction so as to be along the peripheral surface of the water collecting portion 12, so that the drainage is easily given a swirling force. Moreover, even if the amount of drainage in the water collection unit 12 is large, since the swirling force is reliably applied to the drainage by the blade bodies 12d of the water collection unit 12, the drainage is surely swirled from the drainage port 12a. Is discharged.

In this way, the wastewater flowing down in the water collecting portion 12 becomes a swirl flow, and an air core is formed in the axial center portion of the water collecting portion 12, and the air core is in the vertical pipes 20 above and below. Will be connected to.

Neither of the blades 12d disposed in the water collecting portion 12 protrudes inward from the inner peripheral surface of the drainage port 12a at the lower end, so that dust or the like in the drainage is discharged to each blade 12d. There is almost no possibility of locking, and since the water collecting part 12 is connected to the large diameter part 11 having a diameter larger than that of the inflow cylinder 13, even if dust or the like is locked on each blade 12d Etc. can be easily removed. It should be noted that each of the blade bodies 12d arranged in the water collecting section 12 is
It is not necessary to be provided along the whole of each of the two corner portions 12c, and it may be provided along a part of each of the corner portions 12c.

Such a collecting pipe joint 10 is made of, for example, polyvinyl chloride (PVC), fiber reinforced plastic (FRP), cast iron, etc., and is connected to the inflow pipe 13, the upper standing pipe 20, and the lower end of the water collecting portion 12. The vertical pipe connecting portion 15 and the lower vertical pipe 20 are connected by flange connection or rubber packing connection.
Further, each branch pipe connecting portion 14 and the branch pipe 30 are also connected by flange connection or rubber packing connection.

In the above embodiment, the blade body 12d is arranged in the polygonal water collecting portion 12 that is twisted in the circumferential direction sequentially toward the lower side, but the water collecting portion 12 is If it is a polygonal shape that is sequentially twisted in the circumferential direction as it goes to the lower side, even if the blade body 12d is not provided in the water collecting portion 12, along each side surface 12b of the water collecting portion 12. The drainage that flows down is guided to each side surface 12b and is given a turning force. The cross-sectional shape of the water collecting portion 12 is not limited to the hexagonal shape, but may be a triangular shape, a pentagonal shape, or a decagonal shape.

In addition, in order to impart a swirling force to the drainage that has flowed into the water collecting portion 12, the water collecting portion 12 must have a polygonal shape that is sequentially twisted in the circumferential direction toward the lower side in this way. Rather, the water collecting section 12 has a circular cross-section whose diameter is gradually reduced toward the lower side, and the water collecting section 12 serves as a guide means for imparting a turning force to drainage on its inner peripheral surface. The blade body may be arranged so as to be inclined with respect to the axis of the blade body.

FIG. 3 and FIG. 4 show a collecting pipe joint of the second embodiment of the present invention. In the collecting pipe joint, for example, four guide vanes 13e are arranged at equal intervals in the circumferential direction on the outer peripheral surface of the inflow cylinder 13 having the same shape as that of the first embodiment. Guide blade 13e
Are spirally curved and twisted in the same direction as the inclination direction of each blade 12d in the water collecting part 12. The other structure is similar to that of the first embodiment.

In the collecting pipe joint 10 of the present embodiment, the branch pipe 30 to the branch pipe connecting portion
The drainage flowing in through 14 is guided by each guide vane 13e arranged on the outer peripheral surface of the inflow cylinder 13 to be a swirl flow, and further, the diameter is gradually increased as it goes to the lower side of the inflow cylinder 13. The lower part 13a is also guided to the outer peripheral surface and diffused radially. In such a state, the drainage flows down along the inner peripheral surface of the water collecting portion 12, and is swirled by the side surfaces of the water collecting portion 12 as in the above-described embodiments. Part of the drainage that flows into the water collection section 12
Since the swirl flow is set in advance, the drainage in the water collection unit 12 is given a stronger swirl force and is discharged from the drain port 12a as a strong swirl flow.

Also in the collecting pipe joint of the present embodiment, if the water collecting portion 12 has a polygonal cross-section in a state where the water collecting portion 12 is twisted in the circumferential direction as it goes downward, it is not necessary to dispose the blade body 12d. Further, the water collecting portion 12 does not have to have such a shape, and for example, has a circular cross-sectional shape in which the diameter of the water collecting portion is gradually reduced as the water collecting portion becomes lower, and a swirling force is applied to the water collecting portion. It is also possible to adopt a configuration in which a blade body for doing so is arranged.

(Effects of the Invention) In the collecting pipe joint of the present invention, the drainage flowing from the standing pipe into the water collecting portion is swirled by the swirling cylinder to be swirled and diffused. And
The drainage is given a new swirling force while flowing down along the inner surface of the water collecting portion, and is made synergistically strong swirling flow by the water collecting portion. An air core is formed at the axial center of the drainage, and the drainage flows out while maintaining its inertia. Therefore, the drainage can form air cores communicating with each other in each of the standing pipes connected to the upper and lower sides of the collecting pipe joint. As a result, even when a large amount of drainage from the sanitary kitchen drainage equipment, etc. intensively flows into the collecting pipe joint, the air is constantly communicating with the axial center of the drainage pipe, so Fluctuations can be reduced and trap breakage can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of a collecting pipe joint of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a assembly of a second embodiment of the present invention. FIG. 4 is a vertical sectional view of the pipe joint, FIG. 4 is a sectional view taken along line AA of FIG. 3, and FIG. 5 is a sectional view of a conventional collective pipe joint. 10 …… Collection pipe joint, 11 …… Large diameter part, 12 …… Water collection part, 12a
...... Drainage port, 12b ... side, 12c ... corner, 12d ...
… Blade body, 13 …… Inflow tube, 13a …… Lower part, 13d …… Blade body, 13e …… Guide vane, 14 …… Branch pipe connection part, 20 …… Stand tube.

Claims (1)

[Claims] 1. A collecting pipe joint, which is connected to a vertically arranged vertical pipe and a horizontally arranged branch pipe, respectively, wherein a branch pipe connecting portion to which the branch pipe is connected is provided. And a large diameter portion, and a cylindrical shape in which a lower portion is accommodated in the large diameter portion so that drainage that is connected to the upper standing pipe and flows through the standing pipe flows into the large diameter portion. The diameter gradually increases as it goes down,
An inflow cylinder in which a blade body is arranged on the inner surface in a state of being inclined with respect to its axis, and an inflow cylinder connected to the lower end of the large-diameter portion, are successively reduced in diameter toward the lower side, A water collecting portion having a guide means for giving a swirl to the drainage flowing down along the inner surface, wherein the guide means is arranged along the inner peripheral surface of the water collecting portion having a circular cross section with respect to the axis of the water collecting portion. Blades arranged in the same circumferential direction as the blades arranged in the inflow cylinder, or in the same circumferential direction as the blades arranged in the inflow cylinder as they become lower. A water collection pipe joint that is each side of a polygonal water collection part that is twisted into.