JP6949079B2 - Drainage fittings and drainage system - Google Patents

Description

The present invention relates to a drainage joint and a drainage system.

In recent years, a so-called siphon drainage system has been proposed as an alternative to the conventional gradient drainage system (see, for example, Patent Document 1). As described in Patent Document 1, the siphon drainage system connects a siphon drainage pipe to a water supply device and utilizes the siphon force (negative pressure) generated in the vertical pipe forming the hanging part of the siphon drainage pipe. , A system that improves the efficiency of drainage from water supply equipment.

In this siphon drainage system, the drainage discharged from the water supply equipment flows into the siphon drainage pipe and fills the horizontal pulling pipe forming the horizontal portion of the siphon drainage pipe and the vertical pipe forming the hanging pipe of the siphon drainage pipe. When the vertical pipe of the siphon drainage pipe is filled with drainage, the drainage in the vertical pipe falls due to gravity, and a suction force corresponding to the water head difference in the vertical pipe, that is, a siphon force is generated inside the horizontal pulling pipe. The drainage in the horizontal pulling pipe is sucked toward the vertical pipe by the siphon force, becomes a so-called full flow in which the inside of the siphon drainage pipe is filled with the drainage, and flows down in the siphon drainage pipe.

As a structure for connecting a vertical pipe that generates a siphon force of a siphon drainage system to a vertical pipe, there is a structure in which the vertical pipe is connected via a so-called merging joint.

The merging joint is provided on the side of the main pipe and the tubular main part that connects the lower end of the upper vertical pipe and the upper end of the lower vertical pipe, and is provided in the horizontal direction for connecting the lower end of the vertical pipe. A tubular connecting portion as a protruding branch pipe is provided, and the overall shape is substantially T-shaped. Further, in the merging joint, the axis of the main pipe and the center of the connecting portion intersect at a right angle.

In a structure using such a merging joint, a vertical pipe extending in the vertical direction is connected to a connecting portion protruding in the horizontal direction, so that drainage flows in a direction changed from the vertical direction to the horizontal direction, and the connecting portion It is discharged to the inside of the main section toward the axis of the main section through the axis of the main section.

Japanese Unexamined Patent Publication No. 2006-207190

In multi-story apartment buildings, the water supply equipment on each floor is connected to the vertical pipe, and the water supply equipment is sealed with a trap or the like that stores water to prevent odors from the vertical pipe from flowing into the room. A water reservoir is provided. If the inside of the vertical pipe becomes a positive pressure or a negative pressure with respect to the atmospheric pressure, the sealing water may be blown out or drawn in, and the sealing water storage part may be broken. Therefore, it is necessary to ventilate the inside of the standing pipe in the vertical direction so that the inside of the standing pipe does not have a positive pressure or a negative pressure with respect to the atmospheric pressure so that the inside of the standing pipe is not blocked by drainage.

The drainage that has flowed into the main section from the connection portion passes so as to intersect the axial center of the main section, and then collides with the inner wall of the main section and falls separately to the left and right. In the siphon drainage system, since drainage is performed using siphon force, the flow velocity of the drainage flowing from the connection part to the main part is high, and a large amount of drainage may flow into the main part in a short time. , There is a concern that the ventilation space (air hole) that communicates up and down inside the vertical pipe will become smaller and drainage will not flow smoothly inside the vertical pipe.

In consideration of the above facts, an object of the present invention is to provide a drainage joint and a drainage system capable of smoothly flowing drainage in a vertical pipe.

The drainage joint according to claim 1 is connected to a side portion of a merging joint provided in a vertical pipe, and a drainage passage having a circular cross section is provided inside, and the merging joint is provided on the upstream side in the drainage direction of the drainage passage. A main body having an exposed portion exposed to the outside and a lower end of a vertical pipe for dropping drainage from a water supply device are connected to the upper portion of the exposed portion, and a hole opened on the inner surface of the exposed portion is a flat surface. A vertical pipe connecting portion formed at a position offset radially outward with respect to the axial center of the drainage passage is provided, and one hole is formed in the exposed portion, and the exposed portion is formed. Has a curved drainage drop surface that guides the drainage that has fallen from the hole so that the drainage falls in the direction intersecting the axis of the main body and flows through the drainage passage.

In the drainage joint of claim 1, the main body is connected to the side portion of the confluence joint in which the drainage discharged from the vertical pipe for dropping the drainage flows into the vertical pipe and flows downward, and the drainage is dropped to the vertical pipe connection portion. The vertical pipe to be connected is connected. When the drainage is discharged from the vertical pipe, the drainage flows into the vertical pipe through the main body.

In the piping joint of claim 1, since the hole through which the drainage is discharged is offset with respect to the axis of the drainage passage of the main body, the central axis of the drainage flow discharged from the vertical pipe becomes the main body. It will be offset with respect to the axis of the drainage passage of the part.
The drainage that has fallen from the vertical pipe connection is guided by the curved drainage drop surface, and the direction is changed in the direction that intersects the axis of the main body and flows through the drainage passage. The drainage discharged from the portion to the merging joint goes in a direction deviated from the axis of the vertical pipe.
As a result, the drainage discharged to the merging joint swirls along the inner wall of the vertical pipe and falls while swirling, so that a ventilation space communicating in the vertical direction can be formed near the axis of the vertical pipe. .. By forming a ventilation space that communicates in the vertical direction near the axis of the vertical pipe, drainage can flow smoothly in the vertical pipe. The offset means "off / set" and means that the offset does not intersect.

According to the second aspect of the present invention, in the drainage joint according to the first aspect, the axial center of the vertical pipe connecting portion and the axial center of the main body portion are in different directions.

In the drainage joint according to claim 2, since the directions of the axial center of the vertical pipe connecting portion and the axial center of the main body portion are different, the vertical pipe connected to the vertical pipe connecting portion and the side portion of the merging joint are used. An angle can be provided between the main body and the main body connected in the horizontal direction. Since the direction of the vertical pipe can be set to intersect the horizontal direction such as the vertical direction with respect to the main body connected in the horizontal direction, the direction of the vertical pipe is set to the horizontal direction at the place where the drainage joint is arranged. It is possible to reduce the installation space in the horizontal direction as compared with the case where.

Drainage system according to claim 3, a drainage joint according to claim 1 or claim 2 is connected to the side of the junction joint provided in the standpipe is connected to the vertical pipe connecting portion, the drainage Has the vertical pipe, which generates a siphon force by dropping the pipe.

In the drainage system according to claim 3, when the drainage is discharged from the vertical pipe, the drainage flows into the vertical pipe through the drainage joint and the confluence joint. Since the drainage system according to claim 3 uses the drainage joint according to claim 1 or 2, the drainage discharged to the confluence joint swirls along the inner wall of the vertical pipe and swirls. Since it falls while falling, it is possible to form a ventilation space that communicates in the vertical direction near the axis of the vertical pipe. By forming a ventilation space that communicates in the vertical direction near the axis of the vertical pipe, drainage can flow smoothly in the vertical pipe. In addition, since siphon force is generated in the drainage of the vertical pipe, the drainage speed from the vertical pipe becomes high, and the speed of drainage swirling in the vertical pipe becomes high.

The drainage system according to claim 4 is connected to the drainage joint according to claim 1 or 2 connected to the side portion of the merging joint provided in the vertical pipe, and the vertical pipe connecting portion, and is connected by a pump. It has the vertical pipe, which applies pressure to the drainage.

In the drainage system according to claim 4, when the drainage is discharged from the vertical pipe, the drainage flows into the vertical pipe through the drainage joint and the confluence joint. Since the drainage system according to claim 4 uses the drainage joint according to claim 1 or 2 , the drainage discharged to the confluence joint swirls along the inner wall of the vertical pipe and swirls. Since it falls while falling, it is possible to form a ventilation space that communicates in the vertical direction near the axis of the vertical pipe. By forming a ventilation space that communicates in the vertical direction near the axis of the vertical pipe, drainage can flow smoothly in the vertical pipe. Further, since the pressure is applied to the drainage of the vertical pipe by the pump, the drainage speed from the vertical pipe becomes high, and the speed of the drainage swirling in the vertical pipe becomes high.

As described above, the drainage joint of the present invention has an excellent effect that drainage can flow smoothly in the vertical pipe.
Further, the drainage system of the present invention has an excellent effect that drainage can flow smoothly in the vertical pipe.

It is sectional drawing which shows the apartment house provided with the siphon drainage system to which the embodiment of the drainage joint which concerns on this invention is applied. (A) is a horizontal cross-sectional view (2-2 line cross-sectional view of FIG. 3) showing the drainage joint according to the embodiment, and (B) is a vertical cross-sectional view of the drainage joint (2B-2B line of FIG. 2 (A)). Sectional view). It is a side view which made a part of the drainage joint which concerns on embodiment in the cross section. (A) is a horizontal cross-sectional view of the drainage joint of the embodiment showing the flow of drainage, and (B) is a horizontal cross-sectional view of the drainage joint according to the comparative example showing the flow of drainage. It is sectional drawing which shows the apartment house provided with the siphon drainage system which concerns on another embodiment. It is sectional drawing which shows the apartment house equipped with the pumping drainage system. It is sectional drawing which shows the apartment house equipped with a negative pressure drainage system.

An embodiment of the drainage joint according to the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows the overall configuration of the siphon drainage system 12 in which the drainage joint 10 according to the embodiment of the present invention is used. In this embodiment, an example in which the siphon drainage system 12 is used in an apartment house composed of a plurality of floors will be described.

The siphon drainage system 12 includes a vertical pipe 14 for draining drainage downward. The vertical pipe 14 extends in the vertical direction of the apartment house and penetrates the slabs 16 on each floor of the apartment house. Each house on each floor of the apartment house is provided with a water supply device 18 for draining water.
The water supply device 18 is a device for draining water, and examples thereof include a kitchen sink, a wash basin, a washing machine, a bath such as a unit bath, and a toilet, but other devices may be used.

A siphon drain pipe 22 is connected to the water supply device 18 via a trap 20 that stores sealed water. The siphon drainage pipe 22 includes a horizontal pulling pipe 24 arranged on the slab 16 and a vertical pipe 26 communicating with the horizontal pulling pipe 24. The vertical pipe 26 induces the drainage by generating a siphon force by dropping the drainage. The vertical pipe 26 is arranged in the vertical direction along the vertical pipe 14. The vertical pipe 26 is connected to a merging joint 28 that connects the vertical pipes 14 to each other via a drainage joint 10.

(Composition of merging joint)
As shown in FIGS. 2 and 3, the merging joint 28 includes a cylindrical vertical pipe connecting main portion 30 extending in the vertical direction, and extends horizontally on the side portion of the vertical pipe connecting main portion 30. A cylindrical connecting portion 32 is provided, and the connecting portion 32 is provided at a right angle on the side portion of the vertical pipe connecting main portion 30. The merging joint 28 has a substantially T shape as a whole. Since the connecting portion 32 has a cylindrical shape, the axial center 32C of the outer shape of the connecting portion 32 and the axial center of the passage inside the connecting portion 32 coincide with each other.

In the merging joint 28 of the present embodiment, the drainage flowing downward in the vertical pipe 14 is swirled counterclockwise (in the direction of the arrow CCW in FIG. 2A) on the inner surface of the vertical pipe connecting main portion 30. Fins 35 for forming a vortex are formed. As the merging joint 28, those generally used for drainage facilities such as apartment houses can be used.

(Composition of drainage joint)
The drainage joint 10 includes a main body portion 34 connected to the connection portion 32 of the merging joint 28. The main body 34 is configured to include a cylindrical insertion portion 36A and a hemispherical dome-shaped exposed portion 36B that closes one end side of the insertion portion 36A. Both the insertion portion 36A and the exposed portion 36B of the present embodiment are formed to have a constant thickness, and the inner surface of the exposed portion 36B has a hemispherical curved surface. The internal space of the insertion portion 36A is a drainage passage 37. The outer axis 34C of the main body 34 coincides with the axis 37C of the drainage passage 37 inside the main body 34. Further, the outer axis 34C of the outer shape of the main body 34 and the outer axis 32C of the outer shape of the connection portion 32 of the vertical pipe connecting main section 30 coincide with each other.

The upper part of the exposed portion 36B extends upward to communicate with the main body portion 34 at a position offset toward the axis A direction of the drawing arrow A with respect to the axial center 34C of the main body portion 34 (a position deviated from the axial center 34C by the dimension OL). A cylindrical vertical pipe connecting portion 38 is formed. In the present embodiment, the axis 34C of the main body 34 and the axis 38C of the vertical pipe connecting portion 38 are offset in the horizontal direction, and as shown in FIG. 2 (B), the axis 34C of the main body 34 When viewed from the horizontal direction along the line, the axis 34C of the main body 34 and the axis 38C of the vertical pipe connecting portion 38 are at right angles.

As shown in FIG. 2B, the hole 38A of the vertical pipe connecting portion 38 opens obliquely upward on the inner surface of the exposed portion 36B in the direction of the arrow A in the drawing of the axial center 34C of the main body portion 34. The inner diameter of the insertion portion 36A is formed to be larger than that of the hole 38A of the vertical pipe connecting portion 38.
In the present embodiment, the hemispherical curved surface of the exposed portion 36B corresponds to the curved drainage falling surface of the present invention.

(Action, effect)
Next, the operation and effect of the drainage joint 10 of the present embodiment will be described.
When the drainage from the water supply device 18 is discharged from the vertical pipe 26, the drainage flows into the inside of the vertical merging joint 28 through the vertical pipe connecting portion 38.

As shown in FIG. 2B, the vertical pipe connecting portion 38 is located on the inner surface of the exposed portion 36B of the drainage joint 10 so as to open diagonally upward in the direction of arrow A in the drawing of the axis 34C of the main body portion 34. Therefore, the drainage discharged from the opening is changed in the horizontal direction on the hemispherical curved surface of the inner surface of the exposed portion 36B and in the direction intersecting the axis 34C of the main body portion 34 (arrow in FIG. 2A). B), the vertical pipe connection main unit 30 is discharged in a direction deviated from the direction opposite to the arrow A direction of the axis 30C.

As a result, as shown in FIG. 4A, the drainage (indicated by a plurality of arrows w) turns counterclockwise (in the direction of the arrow CCW) inside the vertical pipe connecting main portion 30 and the vertical pipe 14. However, it is possible to form a relatively large ventilation space S that communicates in the vertical direction near the axis of the vertical pipe connecting main portion 30 and the vertical pipe 14. By forming a relatively large ventilation space S that communicates in the vertical direction near the axis of the vertical pipe 14, drainage can flow smoothly in the vertical pipe 14, and a change in air pressure in the vertical pipe 14 can be achieved. Can be suppressed. By suppressing the change in the air pressure in the vertical pipe in this way, the breakage of the trap 20 of the water supply device 18 can be suppressed. As shown in the comparative example of FIG. 4B, when drainage (indicated by a plurality of arrows w) is performed toward the axis 30C of the vertical pipe connecting main unit 30, the vertical pipe connecting main unit 30 Inside, the drainage flows through the axis 30C so as to collide with the pipe wall and scatter on both sides, and only a small ventilation space S'is formed as compared with the ventilation space S shown in FIG. 4 (A). Depending on the situation, it is possible that the ventilation space S'is not formed.

In the drainage joint 10 of the present embodiment, since the vertical pipe 26 is connected to the vertical pipe connecting portion 38 extending in the vertical direction, the vertical pipe 26 extending in the vertical direction can be arranged along the vertical pipe 14 without bending. It can be done and does not require a large installation space at the place where the drainage joint 10 is arranged. Further, by connecting the drainage joint 10 to the existing merging joint 28, the drainage from the siphon drainage pipe 22 can be smoothly flowed in the vertical pipe 14.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be variously modified and implemented within a range not deviating from the gist thereof. Is.

In the above embodiment, one siphon drainage pipe 22 is connected to the drainage joint 10, but as shown in FIG. 5, a plurality of siphon drainage pipes 22 can be connected via the joint 42. As described above, the drainage joint 10 of the present embodiment can form a ventilation space S communicating with the vertical pipe connecting main portion 30 and the vertical pipe 14 in the vertical direction. Therefore, for example, a plurality of drainage joints 10 can be formed. Even if a large amount of drainage discharged from the siphon drainage pipe 22 flows in at the same time, it is possible to form a ventilation space S having a large cross-sectional area communicating in the vertical direction near the axis of the vertical pipe 14, and the inside of the vertical pipe 14 can be formed. The drainage can flow smoothly.

In the above embodiment, an example in which the drainage joint 10 is used for the siphon drainage system 12 has been described, but a normal drainage pipe that does not generate siphon force can also be connected to the vertical pipe connection portion 38 of the drainage joint 10.

As shown in FIG. 6, a normal drainage pipe 54 can be connected to the vertical pipe connection portion 38 of the drainage joint 10, and the drainage can be forcibly pumped by the pump 52. As a result, a positive pressure is applied to the vertical pipe 26.

Further, as shown in FIG. 7, a pump 56 that generates a negative pressure (vacuum) and sucks the drainage may be provided on the downstream side of the vertical pipe 14 to forcibly suck the drainage. As a result, a negative pressure is applied to the vertical pipe 26.

In the above embodiment, the axial center 34C of the main body 34 and the axial center 38C of the vertical pipe connecting portion 38 are offset in the horizontal direction, and the direction of the axial center 34C of the main body 34 and the axial center 38C of the vertical pipe connecting portion 38 Although the orientation was right, the axial center 34C of the main body 34 and the axial center 38C of the vertical pipe connecting portion 38 may be offset in a direction other than the horizontal direction, and the orientation of the axial center 34C of the main body 34 The direction of the axis 38C of the vertical pipe connecting portion 38 may be other than the right angle.

10 ... Drainage joint, 14 ... Standing pipe, 18 ... Water supply equipment, 28 ... Confluence joint, 34 ... Main body, 38 ... Vertical pipe connection

Claims (4)

A main body having a drainage passage connected to a side portion of a confluence joint provided in a vertical pipe and having a circular cross section inside, and an exposed portion exposed to the outside of the confluence joint on the upstream side in the drainage direction of the drainage passage. Department and
At the upper part of the exposed part, the lower end of the vertical pipe for dropping the drainage from the water supply device is connected, and the hole opened on the inner surface of the exposed part is radially in the plan view with respect to the axis of the drainage passage. A vertical pipe connection formed at a position offset to the outside,
With
One hole is formed in the exposed portion.
The exposed portion has a curved drainage drop surface that guides the drainage that has fallen from the hole so that the drainage falls in the direction intersecting the axis of the main body and flows through the drainage passage.
Drainage fitting. The drainage joint according to claim 1, wherein the axial center of the vertical pipe connecting portion and the axial center of the main body portion have different directions. The drainage joint according to claim 1 or 2 , which is connected to the side portion of the merging joint provided in the vertical pipe, and the drainage joint.
The vertical pipe, which is connected to the vertical pipe connection portion and generates a siphon force by dropping the drainage,
Drainage system with. The drainage joint according to claim 1 or 2 , which is connected to the side portion of the merging joint provided in the vertical pipe, and the drainage joint.
The vertical pipe connected to the vertical pipe connection portion and pressure is applied to the drainage by a pump.
Drainage system with.

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