JPH0427438B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a drain pipe installed in a high-rise building or the like and into which domestic sewage flows.

``Prior Art'' Conventionally, as a drain pipe joint that connects multiple side branch pipes to a standpipe, for example, water flows into a hollow collecting pipe body as described in Japanese Utility Model Application Publication No. 61-50181 from a side branch pipe connection port. There is a method that includes a top cover that allows the waste water to flow through the water guide plate to be merged and guided.

``Problems to be Solved by the Invention'' However, in the case of the above-mentioned conventional means, when the drainage water flowing in from the plurality of side branch pipe connection ports on the side of the pipe body collides with the water guide plate and flows downward, This not only causes problems such as causing the faucet to collide with each other, impeding the smooth flow of wastewater, and causing loud running water noise and air pressure fluctuations inside the pipe.
Even when running water from the upper floors flows down inside the water guide plate, it is not slowed down much and merges with the drainage from the side branch pipe connection, causing large running water noise and air pressure fluctuations at the junction. There was a problem that drainage with excellent water flow performance could not be performed due to such problems.

"Means for Solving the Problems" However, the present invention provides a structure in which a plurality of side branch pipes are connected to a standpipe for communication via a drain pipe joint, in which a receiving pipe is erected in the center of the drain pipe joint. , connecting the upper standpipe and the upper end side of the receiving pipe, and forming a polygonal square inner hole in the receiving pipe with the lower end opening facing the collecting drop port on the lower end side of the drain pipe joint; A helical rectifying surface that guides the flowing water from the side branch pipe outflow in the same rectifying direction as the rectifying flow that rotates down the inner hole in one direction along the helical inner peripheral surface centered on the axis of the receiving pipe. , formed on the polyhedral outer periphery of the receiving tube.

"Function" Therefore, by arranging the receiving pipe at the junction of the standpipe and the side branch pipe, it is possible to easily improve the drainage efficiency of the standpipe and eliminate the need for conventional ventilation pipes. In addition to simplifying the structure and reducing costs, the outflow speed is reduced by the side flow effect of the corners of the rectangular inner hole and the frictional resistance of the polygonal inner circumferential surface, thereby reducing the sound of running water and fluctuations in air pressure. In addition, by guiding and converging the water flowing from the side branch pipe in the same horizontal rectifying direction as the rectifying flow flowing out from the inner hole using a spiral rectifying surface, it is possible to generate turbulence and faucet action in these water flows. It is possible to improve the water flow performance by making it possible to drain water smoothly without any problems.

"Example" Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a plan view of the main parts, and FIG. 2 is an explanatory view of the entire structure. A drainage standpipe 2 is installed from the lowest floor to the top floor of a high-rise building 1. The upper end of the standpipe 2 is connected to the building 1.
A cover 3 is fixed to the upper end of the standpipe 2 to protrude from the roof and open to the atmosphere and prevent rainwater and wind from entering.

Further, a drain pipe joint 4 is provided in the middle of the standpipe 2,
A plurality of horizontal branch pipes 5 are connected to the standpipe 2 via a drain pipe joint 4, and a bend pipe 6 is provided at the lowest end of the standpipe 2, and a bend pipe 6 is provided at the lowest end of the standpipe 2, and Then, the horizontal pipe 9 is connected to the bend pipe 6. Then, the domestic sewage generated on each floor of the building 1 flows out from each side branch pipe 5 to the standpipe 2, and the water flowing from the standpipe 2 is sent to the main sewer pipe (not shown) via the side pipe 9. It is configured to do so.

Further, as shown in FIGS. 3 to 5, a cylindrical side plate portion 10 having a larger diameter than the standpipe 2,
The drain pipe joint 4 is provided with an upper plate part 11 that closes a circular opening at the upper end of the drainage pipe joint 4, and a collective drop opening 12 formed by narrowing the lower end side of the side plate part 10 to approximately the same diameter as the standpipe 2. The lower standpipe 2 is connected to the collective drop port 12 of the drainage joint 4 via a flange joint 13. On the other hand, 90 mm are radially formed on the outer circumference of the side plate portion 10.
Three water intake ports 14 are formed at intervals of 30 degrees, and a horizontal branch pipe 5 is connected to each water intake port 14 through a flange joint 15, and three horizontal branch pipes 5 are connected to the drain pipe joint 4. ... are connected, and the side plate part 10 of the drain pipe joint 4
Each side branch pipe 5 is configured to communicate with and open to a common space 16 formed inside.

Further, a receiving pipe 17 is integrally provided in the center of the upper plate portion 11, and the receiving pipe 17 is provided upright in the center of the common space 16 of the drain pipe joint 4, so that the upper end of the vertical pipe 2 and the receiving pipe 17 are connected to each other. They are communicated via a flange joint 18 and have a downstream opening 19 at the lower end of the receiving pipe 17 facing the collective drop opening 12 .

Further, a receiving pipe 17 disposed in the common space 16
The middle or lower end side of the standpipe 2 and the receiving pipe 17 are formed into a rectangular cylindrical shape, as shown in FIGS. 1 and 4.
Rectification flowing down inside (counterclockwise rotation in plan view)
The receiving pipe 1 receives water flowing from the side branch pipe 5 in the same direction as
7, the flow is guided by a rectifying surface 20 on the outer periphery, and the rectifying surface 20 is displaced in the rectifying direction (arrow a) with respect to the axis of the horizontal branch pipe 5, so that the water flowing from the horizontal branch pipe 5 is directed to the rectifying surface 20. The receiving pipe 17 is discharged in substantially the same direction as the rectification (arrow b)
The rectangular cylindrical portion of is formed in a spiral shape returning to the rectification direction a around the axis line, and the spiral inner and outer circumferential surfaces of the receiving tube 17 are configured to assist the rectification movement.

Further, as shown in FIG. 5, the lower end side of the receiving tube 17 is formed into a tapered shape.
The outflow speed of water in the receiving pipe 17 is slowed down by the side flow (secondary water flow) action generated at the corners of the rectangular inner hole 21 of No. 7 and the frictional resistance of the rectangular inner circumferential surface. Even if the flowing water falls through the standpipe 2 at a rapid rate, it is decelerated at the stage of flowing down from the upper end side cylindrical part of the receiving pipe 17 to the square cylindrical part, and is further decelerated within the square cylindrical part of the receiving pipe 17. It is configured such that the sound of the flowing water is lowered by braking the flowing water.

On the other hand, one side of the receiving pipe 17 other than the rectifying surface 20 is opened in the axial direction to form an air communication groove 22, and the common space 16 is connected to the interior from the side of the receiving pipe 17 through the communicating groove 22. It communicates with
Even if the outlet 19 is blocked by running water and the outlet 19 is blocked for ventilation, the air in the side branch pipe 5 flows through the common space 16 and the communication groove 22 to the receiving pipe 17.
Since the high pressure air in the common space 16 that is compressed by the water flowing from the side branch pipe 5 is communicated with the central extension vent, the high pressure air in the common space 16 is transferred from the communication groove 22 to the extension vent formed at the center of the receiving pipe 17 and the standpipe 2. The air is discharged to the upper end side of the standpipe 2 through the pipe, and is configured to alleviate fluctuations in air pressure within the common space 16 and improve water flow performance.

In addition, the lower end of the receiving pipe 17 is drawn into a tapered shape, and the inner diameter of the downstream port 19 of the receiving pipe 17 is formed to be slightly smaller than the inner diameter of the lower collection drop port 12, and the inner diameter of the receiving pipe 17 is formed to be slightly smaller than the inner diameter of the lower collecting port 12. A collective falling surface 23 is formed by the inner surface of the step that joins the falling port 12, and the water flowing from the flowing port 19 spreads due to this diffusion effect and hits the falling surface 23,
The water flowing from the side branch pipe 5 and the water flowing from the outlet 19 move in the rectifying direction, mix at the falling surface 23, and fall into the outlet 12.

Further, as shown in FIG. 6, the bend pipe 6 is bent into an arc shape so as to be displaced approximately 90 degrees between the inlet 24 and the outlet 25, and the inside of the bend pipe 6 is bent in the direction of the bending center of the bend pipe 6. The peripheral surface 26 is bulged and the inlet 24
The inner diameter of the middle part of the bend pipe 6 is formed larger than that of the outlet 25, so that even if the amount of water flowing down from the stand pipe 2 flowing down along the outer circumferential surface 27 of the bend pipe 6 increases, the middle part of the bend pipe 6 is The increased volume of the pipe improves water flow and prevents air from clogging in the bend pipe 6, and the inner circumferential surface 26 on the outlet 25 side becomes steeply sloped toward the upstream, which prevents detergent foam, etc. from flowing in the two directions of the vertical pipe. The steep slope of the inner circumferential surface 26 prevents the backflow of detergent foam and the like due to the faucet action caused by water treading.

Further, as shown in FIG. 6, a step 28 is provided on the bottom side of the energy-reducing joint 8, and the outlet 30 side of the joint 8 is formed lower than the inlet 29 side. 31, and the speed of the water flowing from the bend pipe 6 is reduced by the energy reducing pond 31 inside the energy reducing joint 8, and the length (l) is proportional to the overall height of the vertical pipe 2. An auxiliary horizontal pipe 7 is formed on the
The energy reduction basin 31 is arranged at a position where a water jump phenomenon occurs due to the speed difference between the water flowing from the bend pipe 6 and the water flowing from the horizontal pipe 9, and the water flowing through the horizontal pipe 9 is slower than the water flowing through the bend pipe 6. However, the deenergizing effect of the flowing water by the deenergizing pond 31 prevents the water from jumping up, undulating, detergent foam, etc., and the air core on the curved surface inside the bend pipe 6 is also formed and maintained in an appropriate state. It consists of

The present embodiment is constructed as described above, and the water flowing from the side branch pipe 5 is passed through the rectifying surface 20 on the outer periphery of the receiving pipe 17.
At this time, the flowing water is rectified inside the common space 16 and flows down from the collecting outlet 12 to the lower standpipe 2, and the flowing water flowing down from the upper standpipe 2 into the receiving pipe 17 is The air is decelerated in multiple stages through a rectangular cylindrical inner hole 21, and flows from the flow outlet 19 at the lower end of the receiving pipe 17 to the collective fall port 12 via the collective fall surface 23, and the air is compressed within the common space 16. When the high pressure air of the air 16 is
It is discharged into the interior through the communication groove 22 on this side surface.

The water flowing down from the lower end of the standpipe 2 flows into the horizontal pipe 9 via the bend pipe 6, the auxiliary horizontal pipe 7, and the energy reducing joint 8. When the flowing water flows into the energy reducing joint 8, its energy is reduced by the energy reducing pond 31 and flows out into the horizontal pipe 9.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a structure in which a plurality of horizontal branch pipes 5 are connected to the standpipe 2 via the drain pipe joint 4, in which a central portion of the drain pipe joint 4 is connected. A receiving pipe 17 is installed upright, the upper standpipe 2 and the upper end of the receiving pipe 17 are connected, and the lower end opening faces the collective drop opening 12 on the lower end side of the drain pipe joint 4. A rectangular inner hole 21 is formed in the receiving pipe 17, and the rectifying direction a is the same as the rectifying flow that rotates down the inner hole 21 in one direction along the spiral inner peripheral surface centered on the axis of the receiving pipe 17. A spiral rectifying surface 20 that guides the flow of water from the side branch pipe 5.
is formed on the polyhedral outer periphery of the receiving pipe 17. Therefore, the receiving pipe 17 is disposed at the connection junction of the vertical pipe 2 and the horizontal branch pipe 5 to improve the drainage efficiency of the vertical pipe 2. It is something that can be easily improved.
In addition, it is possible to simplify the structure and reduce costs by eliminating the need for conventional ventilation pipes, etc., and also because of the side flow effect of the corners of the square inner hole 21 and the frictional resistance of the polygonal inner circumferential surface. The outflow speed can be reduced to reduce the sound of flowing water and the occurrence of air pressure fluctuations, and the helical rectifying surface 20 directs the flowing water from the side branch pipe 5 in the same horizontal rectifying direction a as the rectifying flow flowing out from the inner hole 21. By guiding and merging these water flows, smooth drainage without causing turbulence or faucet action is possible, and water flow performance can be improved, which is a remarkable effect.

[Brief explanation of drawings]

Fig. 1 is a plan view of essential parts showing one embodiment of the present invention, Fig. 2 is an overall explanatory view, Fig. 3 is a side view of a drain pipe joint, Fig. 4 is a plan view of the same, and Fig. 5 is the same. The partial bottom view and FIG. 6 are side views of the bend pipe and the energy reducing joint. 2...Standing pipe, 4...Drain pipe joint, 5...Horizontal branch pipe, 12...Collection drop opening, 17...Receiving pipe, 20
... Rectifying surface.

Claims (1)

[Claims] 1. In a structure in which a plurality of side branch pipes are connected to a standpipe via a drain pipe joint, a receiving pipe is installed upright in the center of the drain pipe joint, and the upper stand pipe and the upper end of the receiving pipe are connected. A polygonal rectangular inner hole is formed in the receiving pipe so that the lower end opening faces the collective drop port on the lower end side of the drain pipe joint, and a spiral inner periphery is formed around the axis of the receiving pipe. A spiral rectifying surface is formed on the polyhedral outer periphery of the receiving pipe to guide the flow of water from the side branch pipe in the same rectifying direction as the flow rotating in one direction through the inner hole along the surface. and drain pipes.