JPS585745Y2 - drainage bent pipe - Google Patents

Description

[Detailed explanation of the invention] This invention uses a vertical drainage pipe (hereinafter referred to as a standpipe) that runs in the vertical direction of a building and a horizontal drainage pipe (hereinafter referred to as a lateral pipe) that runs in the horizontal direction of a building. Concerning the connecting drainage pipe.

In drainage systems for medium- and high-rise buildings, sewage, gray water, etc. discharged from each floor are collected through standpipe 1 as shown in Figure 1.
The water flows into the pipe through the collective joint 2, flows down while turning inside the standpipe 1, and at the lowest end passes through the 90° bent pipe 3 and flows into the horizontal pipe 4, and then flows through the horizontal pipe 4 into the sewer pipe and Discharged into sewage tanks, etc.

In this case, the wastewater flowing down inside the standpipe 1 becomes a cylindrical flowing water film inside the 90° bent pipe 3 as shown in the figure, and flows down into the columnar space 5 inside the standpipe 1 and the horizontal pipe 4. The inner upper space 6 is blocked by this flowing water film.

Therefore, the air that has flowed down in the standpipe 1 as the wastewater flows down does not flow into the horizontal pipe upper cavity 6, and the air is compressed in the lower part of the columnar space 5 in the standpipe, generating excessive positive pressure. In particular, it has a negative effect on the equipment traps on the lower floors, and becomes a serious problem when the amount of runoff drainage is large.

In FIG. 1, 7.8 is a waste water pipe and a gray water pipe connected to appliances such as a toilet bowl and a kitchen sink, respectively.

In order to solve this problem, the present invention aims to provide a drainage bent pipe that can communicate the columnar space in the vertical pipe with the upper space in the horizontal pipe. A triangular pyramid-shaped protrusion is placed near the position where the bent pipe body begins to bend around the center of curvature of the bent pipe body, and in a position close to the center of curvature in the circumferential direction, so that the apex of the protrusion faces toward the end of the bent pipe main body. An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

In Figure 2, the stand pipe 1, collective joint 2, horizontal pipe 4, etc.
It is substantially the same as the one in the figure, and the explanation will be omitted.

A drainage bent pipe 11 according to the present invention is connected to the lower end 1a of the standpipe 1.

This drainage bent pipe 11 includes a bent pipe main body 11a and a bent pipe main body 11a.
It consists of a standpipe connection part 11b forming a socket at one end, and a horizontal pipe connection part 11c forming an insertion port at the other end of the bent pipe main body 11a. The cross-sectional area increases toward the horizontal pipe connection portion 11c, and the curved pipe main body 1
A protrusion 13 in the shape of a triangular pyramid is provided on the inner peripheral surface 12.12 of 1a.

This protrusion 13 is located near the inner pipe connecting portion 11b at two positions where the curved pipe body 11a begins to bend around the center of curvature in the axial direction of the curved pipe body 11a, and in the circumferential direction near the curvature of the curved pipe body. It is located near the center.

Further, the triangular pyramid-shaped protrusion 13 has its apex facing the vertical pipe connection part 11b and is located on the installation surface 12 inside the curved pipe main body, and two triangular slopes 14a and 14b protrude from the inner circumferential surface of the curved pipe main body. It is formed in such a way that

When the drainage bent pipe 11 equipped with such a protrusion 13 is inserted at the connection part between the vertical pipe 1 and the horizontal pipe 4 as shown in FIG. After the drainage water flowing down as a water film flows into the drainage bent pipe 11, as shown in FIGS. 116 is broken.

Therefore, the columnar space 5 in the vertical pipe 1 and the upper space 6 in the horizontal pipe 4
and are in uninterrupted communication with each other by a sewage membrane.

Here, the cylindrical water film is separated along the tube axis direction without being subjected to sudden resistance by the two inclined surfaces 14a and 14b of the triangular pyramid-shaped protrusion 13, and is smoothly distributed to both sides. When a protrusion is installed, the protrusion suddenly distributes the wastewater to both sides, and this distributed wastewater collides violently with the wastewater on both sides, creating a turbulent flow, and as a result, it becomes ineffective when the wastewater flow rate increases. Not at all.

In addition, the drainage water that has passed through the protrusion 13 portion is
2, the jumping phenomenon near the entrance of the horizontal pipe 4 from the horizontal pipe connection portion 11c is also reduced.

According to the drainage curved pipe of the present invention, as is clear from the above explanation, the triangular pyramid-shaped protrusion blocks the columnar space in the vertical pipe and the upper space in the horizontal pipe in the cylindrical flowing water film that has flowed in. Since the parts can be separated and distributed smoothly to both sides, the columnar space of the vertical pipe and the upper space of the horizontal pipe can be reliably communicated even if the amount of drainage water is large.
This can prevent excessive positive pressure from occurring at the bottom of the standpipe.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a conventional example, Fig. 2 is a longitudinal sectional view of an embodiment of the present invention, Fig. 3 is a sectional view taken along the
The figure is a sectional view taken along the line ■-■ in FIG. 3. 1...Standing pipe, 4...Horizontal pipe, 11...
...Drainage bent pipe, 11a...Bent pipe body, 11b
...... - Stand pipe connection part, 11c...Horizontal pipe connection part, 12...Inner peripheral surface, 13... Triangular pyramid-shaped projection, 14a, 14b ...Triangular inclined surface.

Claims (1)

[Scope of utility model registration request] A triangular pyramid-shaped protrusion is placed on the inner circumferential surface of the bent pipe body, in the axial direction near the position where the bent pipe main body starts to bend around the center of curvature of the bent pipe main body, and in the circumferential direction at a position close to the curvature center. A drainage bent pipe characterized in that the apex is provided so as to face the end of the bent pipe body.