JPH0361877B2 - - 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 contaminants 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. Contamination was being discharged from the side pipe into the main sewer pipe.

"Problems to be Solved by the Invention" In the above-mentioned prior art, since the water velocity in the horizontal pipe is slower than that in the vertical pipe, the water flowing from the vertical pipe collides with the water in the horizontal pipe, causing water to flow inside the horizontal pipe. There was a problem that water splash phenomenon was likely to occur, and water flowability was not maintained due to splashing and swell of water and generation of detergent foam.

"Means for Solving the Problems" 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. A deenergizing joint is provided between the bend pipe and the horizontal pipe to reduce the outflow velocity, and also to form a deenergizing reservoir therein to decelerate the velocity of water flowing from the bend pipe.

``Function'' Flowing water falling rapidly through the standpipe from the upper floors,
By slowing down the flow rate and rectifying the flow while flowing down the receiving pipe, the sound of running water is prevented from becoming high-pitched and air pressure fluctuations are large, and the faucet action at the collection outlet is prevented. While improving the flowing water performance, when flowing water flows down from the vertical pipe to the side pipe via the bend pipe, the difference in flow velocity is reduced, and the flowing water damping effect at the pipe joint and the flowing water deenergizing effect at the deenergization joint are reduced. Therefore, it is possible to effectively reduce the force of water flowing into the horizontal pipe and prevent the water from jumping up and undulating within the horizontal pipe, thereby preventing water splashing and detergent foam from occurring within the horizontal pipe. The air core formed within the bent pipe can also be properly maintained, and the water flow properties of the bent pipe and the horizontal pipe can be easily improved.

"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.
A cover 3 is fixedly installed at 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, 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 sewage main 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, and a side plate portion 1
The drain pipe joint 4 is provided with an upper plate part 11 that closes a circular opening at the upper end of the drain 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 collection outlet 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 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. 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 collective falling surface 23 is formed by the inner surface of the step joining with the falling port 12, and the flowing water 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 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 made larger than that of the outlet 25, so that even if the amount of water flowing down from the vertical pipe 2 along the outer circumferential surface 27 of the bend pipe 6 increases, the bend pipe 6 is The increased volume of the middle part improves water flow, prevents air from clogging in the bend pipe 6, and makes the inner circumferential surface 26 on the outlet 25 side steeply sloped toward the upstream, preventing detergent foam from flowing in the two directions of the vertical pipe. The structure is such that the backflow of detergent foam and the like is prevented by the steep slope of the inner circumferential surface 26, and the detergent foam and the like are prevented from flowing back due to the occurrence of faucet action due to the phenomenon of running water.

Furthermore, as shown in FIGS. 1 and 6, a stepped portion 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. A deenergizing reservoir 31 is formed in the deenergizing joint 8, and the bent pipe 6
An auxiliary horizontal pipe 7 is formed with a length l proportional to the overall height of the standpipe 2, and the speed difference between the water flowing from the bend pipe 6 and the water flowing from the horizontal pipe 9 is reduced. Deenergization pond 3 is located at the position where the water jumping phenomenon occurs due to
1 is arranged, and even if the water flow speed in the horizontal pipe 9 is slower than the water flow speed in the bend pipe 6, the water jump-up, swell, detergent foam, etc. can be prevented by the energy-reducing effect of the energy-reducing pond 31. Prevent and also bend pipe 6
The air core on the internal curved surface is also formed and maintained in an appropriate 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 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 receiving pipe 1 is formed in
7 is provided so as to reduce the outflow speed, and a deenergization joint 8 that forms a depowering reservoir 31 inside which decelerates the velocity of water flowing from the bend pipe 6 is interposed between the bend pipe 6 and the horizontal pipe 9. Because of this, the flowing water falling at a rapid rate in the standpipe 2 from the upper floor can be slowed down and rectified while flowing down the receiving pipe 17, and the sound of running water becomes high-pitched. In addition to preventing air pressure fluctuations from becoming large,
The water flow performance can be improved by preventing the faucet action at the collecting outlet 12, and when the water flows down from the vertical pipe 2 to the horizontal pipe 9 via the bend pipe 6, the difference in flow velocity is reduced, and the Both the flowing water braking effect at the joint 4 and the flowing water reducing effect at the force-reducing joint 8 effectively reduce the force of flowing water into the horizontal pipe 9 and prevent water from jumping and undulating within the horizontal pipe 9. It is possible to prevent the occurrence of water splashing and detergent foam in the horizontal pipe 9, and also to properly maintain the air core formed in the bend pipe 6. This makes it possible to easily improve water flow in the horizontal pipe 9.

[Brief explanation of drawings]

Fig. 1 is a side view of the main parts showing one embodiment of the present invention, Fig. 2 is an overall explanatory view, Fig. 3 is a side view of the 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, 8...Energy reducing joint, 9...Horizontal pipe, 31...Energy reducing pond.

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 A polyhedral rectangular shape 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 is provided so as to reduce the outflow velocity in the receiving pipe due to the side flow effect of the corners of the rectangular inner hole and the frictional resistance of the polyhedral inner circumferential surface. A drain pipe characterized in that a deenergizing joint that forms a deenergizing pond therein to reduce the speed of flowing water is interposed between the bend pipe and the horizontal pipe.