JP3432073B2 - Drainage collecting pipe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pipe in a one-pipe type drain pipe used for, for example, a middle-to-high-rise apartment house, in which sewage and miscellaneous drainage flow through the same drain pipe. The present invention relates to a drainage pipe interposed therein. 2. Description of the Related Art Conventionally, a drainage pipe is composed of an upper pipe and a lower pipe, and is disposed horizontally in the upper pipe and the lower pipe. There is a horizontal connection portion for connecting each, the opening of the drainage outflow side of these horizontal connection portion is formed on the surface facing in the radial direction, there is one from the horizontal connection portion of the upper pipe into the drainage collecting pipe There is a problem that the drained water that flows out flows back to the horizontal drain pipe connected to the horizontal connection portion via the horizontal connection portion of the lower pipe. In this case, it is conceivable to provide a backflow prevention unit for preventing backflow.
There is one disclosed in Japanese Patent Publication No. 39511. [0003] In this device, a backflow prevention portion which is inclined so as to shift radially inward downward is integrally formed on the upper end side of a drainage outflow opening of a lateral connection portion of a drainage collecting pipe. Drainage from the vertical connection portion formed at the upper part of the drainage collecting pipe and connecting the connection pipe portion at the lower end of the vertical drainage pipe is formed by the backflow prevention portion through the horizontal connection portion. This prevents the water from flowing back to the horizontal drain pipe connected to the horizontal connection part. [0004] In the prior art, since the backflow preventing portion is formed integrally with the drainage pipe, it is very difficult to form the drainage pipe by casting or the like. There is a problem that it is difficult to manufacture. Therefore, the present invention
In view of the above problems, it is an object of the present invention to provide a drainage collecting pipe with a backflow prevention portion so as not to make it difficult to manufacture the drainage collecting pipe. [0005] The technical measures taken by the present invention to achieve the above object include an upper pipe 1A to which a vertical drain pipe 2 is connected at the upper part, and a vertical drain pipe at the lower part. 13 is connected to the lower tube 1B, and an upper portion of the lower tube 1B
A vertical connecting part 7 for connecting the connecting pipe part 15 on the lower end side of the upper pipe 1A is provided, and the upper pipe 1A and the lower pipe 1B are provided with:
Horizontal connecting portions 6 and 9 for connecting the horizontal drain pipes 5 and 8 arranged in the horizontal direction are provided, and a holding body 20 that is fitted and held from the vertical connecting portion 7 is provided in the lower pipe 1B. The holding member 20 is formed so as to be inclined so as to move radially inward as it goes downward, and the horizontal connecting portion 9 of the lower pipe 1B is formed.
Is disposed on the upper side of the drainage outflow side opening 9A, and
And a drain outlet side opening 9A of the lateral connecting portion 9 of the lower pipe 1B.
Lateral connection of upper tube 1A located above opposing part
Waste water flowing out from the drain outlet side opening 6A parts 6, lower
It is characterized in that a backflow prevention portion 21 for preventing backflow to the lateral connection portion 9 of the pipe 1B is provided. Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment. In FIG. 4, reference numeral 1 denotes a drainage collecting pipe, and an upper pipe 1
A and a lower tube 1B. Upper tube 1A
At the upper part, a vertical connecting part 3 for connecting the vertical drain pipe 2 is provided, and at the lower part, a horizontal drain pipe 5 which is disposed in a horizontal direction and allows drainage from the toilet 4 to flow to the drain collecting pipe 1 is connected. Horizontal connection 6
Is provided. On the other hand, a vertical connecting portion 7 for connecting the upper tubular body 1A is provided on an upper portion of the lower tubular body 1B, and a sink, a sink and a sink are disposed below the vertical connecting portion 7 in a horizontal direction. A horizontal connecting portion 9 is provided to which a horizontal drain pipe 8 for flowing drain water from a place or the like to the drain collecting pipe 1 is connected. The lower tube 1B has a lower portion through which a through hole 11 formed in the slab 10 is inserted and fixed by a mortar 12, and a lower end connected to a vertical drain pipe 13. As shown in FIGS. 1 to 3, the drainage outflow side opening 6A of the horizontal connection part 6 of the upper pipe 1A is located above the drainage outflow side opening 9A of the horizontal connection part 9 of the lower pipe 1B. At the same time, the openings 6A and 9A are formed on the surfaces facing each other in the radial direction of the tube. A flange 14 is formed at the upper end of the vertical connecting portion 7 of the lower tube 1B. A connecting tube 15 at the lower end of the upper tube 1A is inserted into the connecting portion 7, and an inner periphery of the flange 14 is formed. The sealing material 16 arranged on the side is externally fitted to the connecting pipe portion 15 and the bolts and nuts 18 and 19 are attached to the flange 14.
The upper tube 1A and the lower tube 1B are connected by being pressed by the pressing ring 17 fastened by. At the upper part in the lower tube 1B, a holding body 20 fitted inside from above the vertical connecting portion 7 is provided. The holding body 20 has a tubular portion 20A fitted inside the upper end side of the main body portion of the lower tubular body 1B, and extends radially outward from the upper end portion of the tubular portion 20A and is formed on the bottom surface 7A of the connecting portion 7. And a flange portion 20 </ b> B to be held and held by the connection portion 7. A backflow preventing portion 21 formed by extending a portion of the cylindrical portion 20B and cutting and raising the cylindrical portion 20B is integrally provided on the cylindrical portion 20B of the holding body 20. The backflow prevention portion 21 is inclined so as to move radially inward downward, and is positioned on the upper end side of the drainage outflow opening 9A of the horizontal connection portion 9 of the lower pipe 1B. The drainage discharged from the drainage outflow opening 6A of the horizontal connection part 6 of the upper pipe 1A hits the backflow prevention part 21, and the horizontal connection of the lower pipe 1B as shown by a virtual arrow in FIG. It prevents backflow to the horizontal drain pipe 8 through the drain outlet opening 9A of the part 9. By not forming the backflow prevention portion 21 integrally with the drainage pipe 1 as described above, there is an advantage that the degree of freedom in setting the dimensions of the backflow prevention portion 21 is large. FIG.
FIG. 7 to FIG. 7 show the second embodiment, in which the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and different points will be described. In FIG. 5, the drainage collecting pipe 1
On the upper side of the upper pipe 1A above the horizontal connecting portion 6, a function of drawing drainage from the vertical drain pipe 2 to one side and a function of preventing backflow to the horizontal drain pipe 5 connected to the horizontal connecting portion 6. Is integrally formed so as to be inclined downward. On the inner peripheral surface on the lower side of the lower tubular body 1B, there are provided swirling blades 23 which are inclined with respect to the pipe axis direction (or are spirally formed around the pipe axis). The drainage flowing into the pipe 1 is changed into a swirling flow, and the drainage is caused to flow along the pipe wall, thereby creating a space without a drainage flow, that is, an air core, in the center of the drainage pipe. The swirling flow and the air core reduce the fluctuation of air pressure in the pipe, which is the cause of the "burdling noise", and exhibit smooth and quiet drainage flow performance. In addition, a drainage pipe or a curved pipe having swirling vanes having the same function is provided on the upstream side of the drainage pipe 1, and the drainage swirled from the vertical drainage pipe 2 is supplied to the drainage pipe 1. Flow down. The drift guide 22 is configured so as not to obstruct (or to positively turn) the swirled drainage flow. The holder 20 has a notch 24 formed by cutting a part of the holder 20 in the axial direction, so that the diameter of the holder 20 can be expanded or reduced. This is because, when the drainage collecting pipe 1 is formed by casting, there is inevitably some error in the diameter of the drainage collecting pipe 1, and the notch 24 allows the notch 24 to be used in the first embodiment.
This is for avoiding a situation where the diameter of the holding body fitting portion on the upper part of the lower tube 1B becomes smaller than the diameter of the holding body 20 so that the holding body 20 cannot be fitted. As shown by the phantom line in FIG. 7, the holder 20 has a larger diameter in a state before being fitted to the upper part of the lower tube 1B than in a state of being fitted to the upper part of the lower tube 1B. It is in the shape. Therefore, when fitting the holding body 20 to the upper part of the lower tube 1B, the holding body 20 is elastically deformed so as to reduce the diameter. Thereby, the holding body 20 is connected to the lower tube 1
When fitted to the upper part of B, it is almost perfectly attached to the upper part of the lower tube 1B by the elastic restoring force. This is because if the holder 20 protrudes largely inward in the radial direction from the opening edge of the lower end of the upper tube 1A, it adversely affects the swirl flow of the drainage described above.
This is so as to be attached to the upper part of B. The backflow prevention part 21 is formed separately from the holding body 20 and
0 is fixed by welding. According to the present invention, an upper pipe 1A to which a vertical drain pipe 2 is connected at the upper part and a lower pipe 1B to which a vertical drain pipe 13 is connected at the lower part are provided. In the upper part of body 1B,
A vertical connecting part 7 for connecting the connecting pipe part 15 on the lower end side of the upper pipe 1A is provided, and the upper pipe 1A and the lower pipe 1B are provided with:
Horizontal connecting portions 6 and 9 for connecting the horizontal drain pipes 5 and 8 arranged in the horizontal direction are provided, and a holding body 20 that is fitted and held from the vertical connecting portion 7 is provided in the lower pipe 1B. The holding member 20 is formed so as to be inclined so as to move radially inward as it goes downward, and the horizontal connecting portion 9 of the lower pipe 1B is formed.
Is disposed on the upper side of the drainage outflow side opening 9A, and
And a drain outlet side opening 9A of the lateral connecting portion 9 of the lower pipe 1B.
Lateral connection of upper tube 1A located above opposing part
Waste water flowing out from the drain outlet side opening 6A parts 6, lower
Since the backflow prevention portion 21 for preventing the backflow from flowing into the horizontal connection portion 9 of the pipe 1B is provided, the provision of the backflow prevention portion 21 does not make it difficult to manufacture the drainage collecting pipe.
Since the holding body 20 provided with the backflow prevention part 21 is held by being fitted into the vertical connection part 7, the attachment is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a drainage collecting pipe according to a first embodiment. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a plan sectional view of the drainage collecting pipe according to the first embodiment. FIG. 4 is a side view of a piping structure according to the present invention. FIG. 5 is a sectional view of a drainage collecting pipe according to a second embodiment. FIG. 6 is a sectional view taken along line BB of FIG. 7; FIG. 7 is a plan sectional view of a drainage collecting pipe according to a second embodiment. [Description of Signs] 1 Drainage collecting pipe 8 Horizontal drainage pipe 7 Vertical connection part 9 Horizontal connection part 9A Opening 15 Connection pipe part 20 Holder 21 Backflow prevention part

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Yoshitaka Abe               7-1-1 Minamienkajima, Taisho-ku, Osaka City, Osaka Prefecture               No. 22 Inside Kubota Enkajima Plant                (56) References Japanese Utility Model Showa Sho 61-159466 (JP, U)

Claims (1)

(1) An upper pipe (1A) to which a vertical drain pipe (2) is connected at an upper part, and a lower pipe (1) to which a vertical drain pipe (13) is connected at a lower part. 1B), and a vertical connecting portion (7) for connecting a connecting pipe portion (15) on the lower end side of the upper tubular body (1A) is provided above the lower tubular body (1B). 1A) and the lower pipe (1B) are provided with horizontal connecting portions (6) and (9) for connecting the horizontal drain pipes (5) and (8) arranged in the horizontal direction. ) Is provided with a holding body (20) which is fitted and held from the vertical connecting portion (7), and the holding body (20) has an inclined shape which shifts radially inward toward the lower side. The lower pipe (1B) is formed and disposed above the drainage opening (9A) of the horizontal connection (9) of the lower pipe (1B), and the horizontal connection of the lower pipe (1B).
Above the part facing the drainage outflow opening (9A) in (9)
Drainage of the horizontal connection (6) of the upper pipe (1A) located at
Drainage discharged from the outlet side opening (6A) is the lower pipe
A drainage pipe provided with a backflow prevention part (21) for preventing backflow in the horizontal connection part (9) of (1B) .