JPH0364756B2 - - 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 continuously connected to a standpipe via a drain pipe joint, in which a receiving pipe is erected in the center of the drain pipe joint. , a polygonal square inner hole is formed in the receiving pipe to connect the upper standpipe and the upper end side of the receiving pipe, and to open the lower end of the receiving pipe so as to face the collection drop opening on the lower end side of the drain pipe joint. At the same time, the lower end side of the receiving pipe is formed into a tapered shape, and the receiving pipe is provided so as to reduce the outflow speed by the side flow effect of the corner portion of the square inner hole and the frictional resistance of the polyhedral inner circumferential surface, The structure is configured such that running water from the lower end of the receiving pipe can be discharged onto a collection falling surface inside the lower side of the discharge pipe joint.

"Function" Therefore, according to the present invention, it is possible to easily improve the drainage efficiency of the standpipe, and also to eliminate the need for conventional ventilation pipes, thereby simplifying the structure and reducing costs. At the same time, it is possible to reduce the sound of running water by controlling the flow inside the receiving pipe, and furthermore, it is possible to make the flowing water from the receiving pipe and the flowing water from the side branch pipe join together in an orderly manner at the collecting and falling surface, thereby reducing the turbulence of the flowing water at the collecting and falling port. Faucet action can be prevented and water flow performance can be improved.

"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 drain pipe joints 4, and a bend pipe 6 is provided at the lowest end of the standpipe 2, and the auxiliary horizontal pipes 7 and the energy-reducing joint 8 are connected to each other. 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 drain pipe joint 4 via a flange joint 13. On the other hand, radially on the outer periphery of the side plate portion 10
Three water intakes 14 are formed at 90 degree intervals, and a horizontal branch pipe 5 is connected to each water intake 14 via a flange joint 15.
The three horizontal branch pipes 5 are connected to the drain pipe joint 4, and the side plate portion 1 of the drain pipe joint 4 is connected to the drain pipe joint 4.
The horizontal branch pipes 5 are configured to communicate with and open to a common space 16 formed inside the pipe 0.

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 pipe is formed into a rectangular cylindrical shape, and as shown in FIG. 5 is guided to flow out by a rectifying surface 20 on the outer periphery of the receiving pipe 17. The rectifying surface 20 is displaced in the rectifying direction (arrow a) with respect to the axis of the horizontal branch pipe 5, and the water flowing from the horizontal branch pipe 5 is The flowing water hits the rectification surface 20 and is discharged in substantially the same direction as the rectification (arrow b), and the rectangular cylindrical portion of the receiving pipe 17 is twisted in the rectification direction a around the axis line to form a spiral shape. , the spiral inner and outer circumferential surfaces of the receiving tube 17 are configured to assist 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 the flowing water is reduced in the receiving pipe 17 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. The structure is such that the sound of the flowing water is reduced by braking the flowing water to the downstream port 19.

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.

Further, as shown in FIG. 1, the lower end of the receiving pipe 17 is formed 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 collecting port 12, and the drain pipe A collecting falling surface 23 is formed by the inner surface of the joint step between the side plate part 10 of the joint 4 and the collecting falling port 12, and the flowing water from the flowing water opening 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 inner circumference of the bend pipe 6 is The 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 the splashing phenomenon.

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. A horizontal pipe 7 is formed, and a damping pond 31 is arranged at a position where a water jumping 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. Even if the water flow rate in the pipe 9 is slow, the energy reduction effect of the water reduction pond 31 prevents the water from jumping up, undulating, detergent foam, etc., and also ensures that the air core on the curved surface inside the bend pipe 6 is properly maintained. It is configured to be formed and maintained in the same state.

The present embodiment is constructed as described above, and the water flowing from the side branch pipe 5 is directed to 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 the rectangular cylindrical inner hole 21 and flows down 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 in 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 multifaceted structure in which a receiving pipe 17 is erected, the upper standpipe 2 and the upper end of the receiving pipe 17 are connected, and the lower end of the receiving pipe 17 is opened facing the collection drop port 12 on the lower end side of the drain pipe joint 4. A rectangular inner hole 21 of the shape is formed in the receiving tube 17, and the receiving tube 1
7 The lower end side is formed into a tapered shape, and the square inner hole 2
The receiving pipe 17 is provided so as to reduce the outflow velocity due to the side flow action of the corners of the drain pipe 1 and the frictional resistance of the polyhedral inner circumferential surface. Since the water is discharged from the lower end of the standpipe 2, the drainage efficiency of the standpipe 2 can be easily improved, and the conventional ventilation pipe etc. are not required, making it easy to simplify the structure and reduce costs. It is possible to reduce the sound of running water by controlling the flow inside the receiving pipe 17, and furthermore, the flowing water from the receiving pipe 17 and the flowing water from the side branch pipe 5 are brought together in an orderly manner at the collecting and falling surface 23. It is possible to prevent the turbulence and faucet action of the flowing water at the collection drop opening 12, reduce the flow velocity, improve the flowing water braking effect, and further improve the flowing water performance to discharge the flowing water smoothly. It has the following effects:

[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...stand pipe, 4...drain pipe joint, 5...side branch pipe, 12
...Collection drop opening, 17 reception pipe, 23...Collection fall 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. forming a polygonal rectangular inner hole in the receiving pipe that opens the lower end of the receiving pipe so as to be connected to the lower end of the drain pipe joint, and forming the lower end of the receiving pipe into a tapered shape; The receiving pipe is provided so as to reduce the outflow velocity due to the side flow effect of the corners of the rectangular inner hole and the frictional resistance of the polyhedral inner circumferential surface, while the receiving pipe is provided on the collecting falling surface inside the lower side of the discharge pipe joint. A drain pipe characterized in that it is configured such that running water can be discharged from the lower end.