JPH0361876B2 - - 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, a plurality of side branch pipes are connected to a standpipe to send wastewater from the side branch pipes to the standpipe, and the horizontal pipe is connected to the lower end of the standpipe via a bend pipe. Sewage was being discharged from the side pipe into the main sewer pipe.

``Problems to be Solved by the Invention'' In the prior art, since the inner diameters of the entrance and exit of the bent pipe and the middle part were approximately the same, the increase in the amount of water flowing caused air blockage in the pipe and faucet action due to water splash development. This caused problems such as detergent foam flowing back into the vertical pipe.

"Means for Explaining the Problem" However, the present invention connects a plurality of side branch pipes to a standpipe for collecting drainage via a drain pipe joint, and connects a plurality of side branch pipes to a standpipe for collecting drainage via a bend pipe at the lower end of the standpipe. In a structure in which horizontal pipes are connected for communication, a receiving pipe is set up in the center of the drain pipe joint, and the upper stand pipe and the upper end of the receiving pipe are connected, and the collective fall of the lower end of the drain pipe joint is performed. A polygonal rectangular inner hole opening the lower end of the receiving tube facing the opening is formed in the receiving tube, and the receiving tube to reduce the outflow speed, and make the inner diameter of the intermediate part larger than the inner diameter of the inlet side of the bend pipe, and make the inner diameter of the outlet side smaller than the inner diameter of the middle part of the bend pipe, and the inner circumferential surface of the middle part of the bend pipe It is constructed so that it bulges out in the direction of the center of curvature.

"Function" According to the present invention, the sound of running water can be made high-pitched by slowing down the flow rate and rectifying the flowing water falling rapidly in the standpipe from the upper floor while flowing down the receiving pipe. It prevents large fluctuations in air pressure from occurring, and improves water flow performance by preventing faucet action at the collection outlet, and also when water flows down from the vertical pipe to the horizontal pipe via the bend pipe. , by increasing the volume of the middle part of the bend pipe, preventing air blockage and faucet action in the bend pipe to improve water flow, and making the outlet side of the inner circumferential surface of the bend pipe steep. This improves the ability to prevent backflow of detergent foam, etc., and easily prevents detergent foam, etc. from flowing back in the direction of the vertical pipe.

"Example" Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a side view of the main parts, and FIG. 2 is an explanatory view of the entire structure. A drainage standpipe 2 is erected from the bottom floor to the top floor of a high-rise building 1. The upper end of the standpipe 2 is connected to the building 1.
In addition to protruding onto the roof of the building and opening it to the atmosphere,
A cover 3 that prevents rainwater and wind from entering is fixed to the upper end of the standpipe 2.

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 large diameter cylindrical side plate part 10 by the standpipe 2, and an upper plate part 11 that closes the circular opening at the upper end of the side plate part 10,
A collective drop opening 12 formed by narrowing the lower end of the side plate portion 10 to approximately the same diameter as the standpipe 2 is provided in the drain pipe joint 4. Collection drop port 12 of the drain pipe joint 4
The lower standpipe 2 is connected to the lower standpipe 2 via the flange joint 13. On the other hand, three water intakes 14 are formed radially on the outer periphery of the side plate portion 10 at 90-degree intervals, and a horizontal branch pipe 5 is connected to each water intake 14 through a flange joint 15, and the drain pipe 3 to 4 fittings
The main horizontal branch pipes 5 are connected, and each horizontal branch pipe 5 is placed in a common space 16 formed inside the side plate part 10 of the drain pipe joint 4.
It is configured so that... is opened for communication.

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 a downstream port 19 at the lower end of the receiving pipe 17 is opened to face the collective drop port 12.

Further, a receiving pipe 17 disposed in the common space 16
The middle or lower end side of the is formed into a rectangular cylindrical shape, and as shown in FIG. The water flowing from the pipe 5 is guided out by a rectifying surface 20 on the outer periphery of the receiving pipe 17, and the rectifying surface 20 is displaced in the rectifying direction (arrow a) with respect to the axis of the horizontal branch pipe 5. 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 receiving tube 17 is formed in such a manner that the spiral inner and outer circumferential surfaces of the receiving tube 17 assist rectifying 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 each corner 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 rapidly inside the standpipe 2, it is reduced 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 reduced 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.

In addition, 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 inner diameter of the receiving pipe 17 is formed to be slightly smaller than the inner diameter of the lower collecting port 12, and the receiving pipe 17 is assembled with the side plate portion 10 of the drain pipe joint 4. A collection droplet 23 is formed by the inner surface of the step that joins the droplet 12, and the water flowing from the outlet 19 spreads due to this diffusion effect and hits the drop 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 as shown in FIG.
The inner diameters A, B, C from the inlet 24 to the outlet 25,
By changing D and E in 5 steps, the inner diameter from the inlet 24 to the outlet 25 side of the intermediate bending portion (A<B<C<
D) is gradually enlarged, and exit 2 of the intermediate bending portion is formed.
The inner diameter D of the outlet 25 is made maximum, and the inner diameter E of the outlet 25 is made smaller than the inner diameter D of the intermediate bent portion. Then, the center position and radius of the arc forming each surface 26, 27 are made different between the inner peripheral surface 26 and the outer peripheral surface 27 of the bent pipe C, so that the outer peripheral surface 27
are formed by circular arcs on the same circumference, and the inner circumferential surface 26 of the intermediate bent portion of the bend pipe 6 is bulged in the direction of the center of curvature of the bend pipe 6, thereby forming an inlet 24 and an outlet 25.
The middle inner diameter D of the bend pipe 6 is smaller than the inner diameter A, E of the bend pipe 6.
Even if the amount of water flowing down from the standpipe 2 that flows down along the outer circumferential surface 27 of the bend pipe 6 increases, the volume of the middle part of the bend pipe 6 is increased, so that the water flow is improved. In addition to preventing air from clogging in the pipe 6, the inner circumferential surface 26 on the outlet 25 side has a steep slope toward the upstream, and the steep slope of the inner circumferential surface 26 prevents detergent foam and the like from flowing back in the two directions of the vertical pipe. However, it is constructed to prevent detergent foam and the like from flowing back due to the occurrence of faucet action due to the water splash 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 flow reduction pond 31 prevents the water from jumping up, swells, detergent foam, etc., and also prevents air cores on the internal curved surface of the bend pipe 6. It is also configured so that it is formed and maintained in an appropriate state.

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

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 connects a plurality of horizontal branch pipes 5 to a standpipe 2 for collecting drainage by connecting a drainage pipe joint 4.
In a structure in which a horizontal pipe 9 is connected to the lower end of the standpipe 2 through a bend pipe 6, a receiving pipe 17 is erected at the center of the drain pipe joint 4, and the upper side standpipe 2 and its receiving pipe 1
The receiving pipe 1 has a polygonal rectangular inner hole 21 which connects the upper end side of the receiving pipe 7 and opens the lower end of the receiving pipe 17 facing the collective drop port 12 on the lower end side of the drain pipe joint 4.
7, the outflow velocity is reduced in the receiving pipe 17 due to the side flow effect of the corners of the rectangular inner hole 21 and the frictional resistance of the polyhedral inner circumferential surface, and the inner diameter A on the inlet side of the bent pipe 6 is On the other hand, the inner diameter D of the middle part is made large, the inner diameter E of the outlet side is made smaller than the inner diameter D of the middle part of the bend pipe 6, and the inner circumferential surface 26 of the middle part of the bend pipe 6 is made to bulge in the direction of the center of curvature. Since the structure is constructed as follows, by slowing down the flow rate of the water falling rapidly in the standpipe 2 from the upper floors and rectifying it while flowing down the receiving pipe 17,
It is possible to prevent the sound of running water from becoming high-pitched and the air pressure to fluctuate greatly, and it is also possible to improve the water flow performance by preventing the faucet action at the collection drop port 12. Even when water flows down the horizontal pipe 9, increasing the volume of the middle part of the bend pipe 6 prevents air blockage and faucet action within the bend pipe 6, thereby improving water flow. The outlet side of the inner circumferential surface of the bend pipe 6 is steeply sloped to improve the backflow prevention ability of detergent foam, etc., and easily prevent detergent foam and the like from flowing back in the two directions of the vertical pipe. As a result, the water can flow down from the standpipe 2 to the horizontal pipe 9 extremely smoothly without any inconvenience, which is a remarkable effect.

[Brief explanation of drawings]

Fig. 1 is a side 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, 6...Bend pipe, 9...Horizontal pipe,
A, D, E...inner diameter.

Claims (1)

[Claims] 1. In a structure in which a plurality of horizontal branch pipes are connected to a drainage collecting standpipe via a drain pipe joint, and a horizontal pipe is connected to the lower end of the standpipe through a bend pipe, the drain pipe joint is A polyhedral square with a receiving pipe erected in the center, connecting the upper standpipe with the upper end of the receiving pipe, and opening the lower end of the receiving pipe opposite the collective drop port on the lower end of the drain pipe joint. An inner hole is formed in the receiving pipe, and the outflow velocity is reduced in the receiving pipe by the side flow effect of the corners of the rectangular inner hole and the frictional resistance of the polyhedral inner circumferential surface, and the inner diameter on the inlet side of the bent pipe is reduced. The inner diameter of the middle part is larger than that of
The drain pipe is characterized in that the inner diameter of the outlet side is smaller than the inner diameter of the middle part of the bend pipe, and the inner circumferential surface of the middle part of the bend pipe is bulged in the direction of the center of curvature.