JP2637460B2 - Drain pipe device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a drainage pipe in a one-pipe type drainage pipe for draining sewage and miscellaneous drainage into the same drainage vertical pipe used in a middle- or high-rise apartment house or the like. Related to the device.

[Conventional technology]

As shown in FIG. 6 (a), a drainage pipe device used in a middle- and high-rise apartment house has a horizontal main pipe 31 connected to a lower end of a drainage pipe 30 and a height position of each floor in the drainage pipe 30. Each has a collecting pipe 32 interposed therebetween, and a horizontal branch pipe 33 is connected to the collecting pipe 32. Then, the sewage and miscellaneous drainage from the living quarters on each floor are allowed to flow into the drainage riser 30 via the horizontal branch pipe 33, and to the drainage ditch via the lowermost horizontal main pipe 31. The floor height of a collective house in which the above-mentioned collecting pipe 32 is used is generally 2.6 m to 3.2 m, and the collecting pipes 32 are provided at substantially equal intervals according to the floor height.

In the single-pipe drainage pipe as described above, when the drainage flows down the drainage stack 30, the flow velocity increases as it descends from the upper floor to the lower floor, generating drainage noise and the air pressure in the drainage stack 30. Greatly fluctuates, and toilets, toilets,
There was a problem that the sealing of the trap in the kitchen and the like was destroyed.

Therefore, as shown in Japanese Patent Publication No. 62-50717, the applicant of the present application provided a rectifying vane for turning the drainage along the inner surface of the vertical pipe 30 inside the collecting pipe 32 to reduce the flow rate of the drainage, thereby causing the above problem. We tried to solve. That is, according to such a configuration, the drainage flowing into the collecting pipe 32 from the horizontal branch pipe 33 on the upper floor and the floor is provided with a swirling force by the rectifying vanes, and flows downward while rotating along the inner wall from this point. I do. Accordingly, the flow rate of the drainage is reduced, and the air and the fluid are separated, so that an air layer is formed at the center in the pipe. The fluid accompanied by the swirling motion flows into the lower pipe collecting pipe 32 while continuing its movement also in the vertical pipe 30, and the swirling motion weakened in the vertical pipe 30 causes the rectifying vanes in the collecting pipe 32 provided for each floor. And the turning force is regenerated.
As a result, the drainage flows down while continuously rotating in response to the rotating motion regenerating action for each floor. As a result, an air layer is formed at the center of the pipe, which communicates with the uppermost pipe, so that pressure fluctuation in the pipe is suppressed, and the above-described trap sealing is prevented from breaking.

Note that, as described above, the collecting pipes 32 that provide the swirling force by providing the rectifying vanes inside as described above are usually arranged on each floor with the same type. This is because, for example, if a collecting pipe having a different swivel ability is interposed by changing the size of the rectifying blade,
Since the amount of air separated from the drainage newly regenerated as a swirling flow in each collecting pipe differs depending on the swirling force applied to the drainage, a local excess or deficiency of the air amount occurs in the drainage vertical pipe. On the contrary, the pressure in the pipe may fluctuate.

On the other hand, as shown in Japanese Patent Publication No. 57-898, the applicant of the present application further describes the construction of the drainage standing pipe 30 so that the drainage smoothly flows from the lower end of the standing drainage pipe 30 into the horizontal main pipe 31 through the curved pipe. A flow straightening pipe is interposed at the joint between the lower end and the horizontal main pipe 31, thereby preventing the drainage water flowing from flowing into the horizontal main pipe 31 from jumping and causing pressure fluctuation in the pipe.

Incidentally, in recent high-rise apartment buildings, as shown in FIGS. 6 (b), (c), and (d), the first floor portion has a parking lot or a stairwell structure, and the lowermost collective pipe 32 is connected to the horizontal main pipe 31.
Is very high.

[Problems to be solved by the invention]

As described above, when the height H from the lowermost collecting pipe 32 to the horizontal main pipe 31 is increased, the downflow drainage is accelerated during this time, the fluctuation in the pipe pressure is increased, and the drainage noise is increased. Has arisen.

That is, the upper graph of FIG. 6 shows that the height H is (a)
(B) It shows the permissible drainage flow rate (/ min) in (c) and (d). (In the graph of the figure, the solid line diagram uses a collecting pipe provided with a rectifying blade inside. The dotted line diagram shows the case where a collecting pipe having no rectifying blades is used.) The permissible drainage flow rate is the maximum flow rate at which a certain amount of drainage causes the pressure fluctuation in the drainage pipe 30 to be ± 25 mmAq. It fluctuates more than ± 25mmAq and the drainage of the trap is destroyed.

The permissible drainage flow rate decreases as the height H increases, as shown in FIGS. Therefore, in order to suppress the pressure fluctuation in the pipe and secure the main permissible drainage flow rate, conventionally, for example, in the middle of the lowest drainage riser pipe, a bypass ventilation pipe having one end connected to the horizontal main pipe is connected, and It is necessary to connect the lowermost drainage pipe to the horizontal main pipe through the bypass ventilation pipe, thereby suppressing pressure fluctuation in the pipe and securing a required allowable flow rate.

However, in order to provide such a bypass vent pipe, it is necessary to provide a through hole for the bypass vent pipe in the lowermost floor slab separately from a hole for drainage standpipe penetration, and the structure becomes complicated. Workability decreases.

The present invention is capable of securing a required allowable drainage flow rate by suppressing pressure fluctuations in the pipe, even if the height from the horizontal main pipe to the lowest collecting pipe is increased as described above, and also improves workability. An object of the present invention is to provide a drainage pipe device that can be improved.

[Means for solving the problem]

In order to achieve the above object, the drainage pipe device of the present invention is characterized in that a plurality of collecting pipes each having a horizontal branch pipe connected to a drainage vertical pipe having a lower end connected to a horizontal main pipe are substantially equally spaced at intervals according to floor height. In a drainage pipe device interposed at intervals and provided with straightening vanes inside each collecting pipe for turning drainage along the inner surface of the drainage riser, the above-mentioned distance between the lowermost collecting pipe and the horizontal main pipe is determined. A straightening pipe is interposed in the longest lower drainage riser, and a straightening vane having substantially the same shape as the straightening vane of each collecting pipe is provided inside the straightening pipe in order to apply substantially the same swirling force to the drainage as to each collecting pipe. It is characterized by being provided.

(Operation)

According to the present invention, the drainage flowing down while turning from the lowest collecting pipe, when flowing down through the lowest drainage riser,
The swirling force gradually weakens as the flow velocity increases. However, the swirling force is applied again as the flow velocity decreases due to the straightening pipe provided in the lowermost drainage pipe. by this,
The turning state is maintained up to the horizontal main pipe, and an air layer is secured at the center. In addition, since this flow straightening pipe is provided with flow straightening vanes of substantially the same shape so that the same swirling force as each of the collecting pipes above the flow straightening pipe, a local excess or shortage of air amount in the drainage vertical pipe is provided. Is also suppressed. As a result, pressure fluctuation in the pipe is suppressed.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is the first floor of a high-rise building, 2 is 2
It is a floor. Reference numeral 3 denotes a drainage pipe, and
A collecting pipe 4 is interposed for each floor. A horizontal branch pipe 5 is connected to the collecting pipe 4, and the horizontal branch pipe 5 is connected to a kitchen or a toilet in each room. The collecting pipe 4 is, for example,
Since the structure is the same as that of the conventional one described in Japanese Patent Publication No. 7 and the like, a detailed description thereof will be omitted. Swirl is given to the drainage flowing down to decelerate.

The lower end of the drainage pipe 3 is connected to a horizontal main pipe 7 via an elbow 6, and the distal end of the horizontal main pipe 7 opens to a drainage groove (not shown) or the like.

A straightening pipe 8 is interposed between the horizontal main pipe 7 and the lowermost collecting pipe 4 at a position 5 m below the lowermost collecting pipe 4.

As shown in FIG. 2, the rectifier tube 8 is provided with an upper rectifier tube portion 9.
And a lower flow straightening tube portion 10, and both straightening tube portions 9 and 10 are integrally connected by a flange joint 11. That is, the receiving portion 12 is provided at the upper end of the lower rectifying tube portion 10, the pressing ring 13 and the packing are fitted to the lower end portion of the upper rectifying tube portion 9, and the lower end of the upper rectifying tube portion 9 is connected to the receiving portion. Inserted into 12,
The flange 15 at the upper end of the socket 12 and the pressing wheel 13 are fastened by bolts (not shown).

At the upper end of the upper rectifying pipe section 9, an opening joint 16 for connecting the upper stanchion 3 in the lowest drainage stake is provided, and to the lower end of the lower rectifying pipe section 10, the lower stanchion 3 is connected. An opening joint 17 is provided. These upper and lower joints 16, 17
The tubular part between them is a cylindrical part 1 with a larger diameter than the upper and lower standing pipes 3,3.
It is eight.

Between the upper opening joint 16 and the cylindrical portion 18 is an upper narrow narrow upper wide taper portion 19, and between the cylindrical portion 18 and the lower opening joint 17 is a lower upper narrow narrow taper portion. It is 20.

Inside the straightening pipe 8, there is a cylindrical portion from the upper tapered portion 19.
A drift plate 21 is provided over 18. This drift plate 21
2 is provided in an inclined shape that gradually descends from the right side to the left side in FIG. 2 and is provided so as to protrude from the inner peripheral surface of the collecting pipe 4. The upper portion of the drift plate 21 is formed by forming the upper taper portion 19 into an inward concave shape, and the lower portions on both sides thereof are formed by tongue pieces protruding from the inner peripheral surface of the collecting pipe 4. . As shown in FIG. 3, a notch opening 22 for drainage flow is formed in the center of the drift plate 21 and has a substantially rectangular shape in plan view.

The inner peripheral surface of the lower taper portion 20 has a gentle gradient peripheral surface.
A rectifying blade 24 as shown in FIG. The rectifying blades 24 are arranged at equal intervals in the circumferential direction, and are provided to be inclined with respect to the tube axis XX.

According to the above configuration, the wastewater flowing down from the upper floor is
The increase in the flow velocity is suppressed by each collecting pipe 4, and the swirling flow flows down. If the drainage water that has passed through the lowermost collecting pipe 4 is not provided with the straightening pipe 8, the flow velocity thereof is accelerated by gravity, is increased, and collides violently with the elbow 6. Flow into Then, the increase in the flow velocity increases the pressure fluctuation in the pipe, and the collision with the elbow 6 causes a large pressure fluctuation, thereby damaging the water sealing trap provided at the end of each horizontal branch pipe 5.

However, in the present embodiment, since the straightening pipe 8 is interposed at a position 5 m below the lowest collecting pipe 4, the drainage that has passed through the lowest collecting pipe 4 is subjected to a drift plate during the speed increase. 21 and the second plate 21
The flow is deflected and decelerated in the direction of arrow a in the figure to prevent fluctuations in the air pressure in the pipe. Then, the drainage that has been deflected in one direction flows down along the inner peripheral surface of the cylindrical portion 18 and is swirled by the rectifying blades 24, and swirls as shown by the arrow B in FIG. You will be guided.

In other words, the speed of the drainage drainage is also reduced by the rectifying blades 24, the faucet phenomenon is prevented, and the drainage drains smoothly and quickly,
In addition, when the drainage is swirled, an air core is formed along the pipe axis XX in a vertically penetrating manner, fluctuation in air pressure in the pipe is prevented, a stable drainage state is obtained, and noise is reduced. . Further, the gentle gradient of the gradient peripheral surface effectively works for preventing the faucet phenomenon and stabilizing the air pressure.

FIG. 5 shows the collecting pipe 4 provided with a horizontal branch pipe joining opening 25 to which the horizontal branch pipe 5 is connected at an intermediate portion in the vertical direction. The straightening pipe 8 shown in FIG.
Except for the region where the horizontal branch pipe joining opening 25 is formed, the overall structure is substantially the same, such as the configuration of the rectifying plate 24 provided on the sloped peripheral surface 23 of the lower tapered portion 20 and the structure of the drift plate inclined obliquely above the same. Is formed. For this reason, the rectifying pipe 8 shown in FIG. 2 imparts substantially the same swirling force to the drainage water as the collecting pipe 4, thereby preventing the above-mentioned air pressure fluctuation in the pipe. Therefore, the above-mentioned collecting pipe 4 may be used as the straightening pipe 8. In this case, since the horizontal branch pipe joining opening 25 is unnecessary, the opening 25 is sealed and covered with the plug cover 26 before use. .

The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the pipe is designed to have a sufficient allowable drainage flow rate with a sufficient allowance for the predicted actual maximum drainage flow rate.
As an example, the height from the horizontal main pipe to the lowest collecting pipe exceeds 3.6 m, as is apparent from the upper graph in FIG. And the allowable drainage flow rate greatly decreases, the closer the estimated actual drainage flow rate approaches the allowable drainage flow rate, the closer the straightening pipe 8 is brought to a position 3.6 m below the lowermost collecting pipe 4. It is preferable to provide such an arrangement, so that the pressure fluctuation in the pipe can be suppressed more reliably.

In the above description, an example in which one straightening pipe 8 is interposed in the lowest drainage pipe 3 has been described. However, when the length of the drainage pipe 3 is further increased, a plurality of straightening pipes 8 are provided. Is provided every 3.6 m to 5 m, pressure fluctuation in the pipe is suppressed, and a desired allowable drainage flow rate can be secured.

〔The invention's effect〕

According to the present invention, since the lowermost drainage riser that is longer than the interval between the collecting pipes arranged at substantially equal intervals is provided with the rectifying pipe that imparts substantially the same turning force as the collecting pipe, the horizontal main pipe is provided. The swirling state of the drainage up to is maintained, an air layer is secured in the center, and the occurrence of a local excess or deficiency in the amount of air in the drainage riser can be suppressed. As a result, pressure fluctuations in the drainage riser are more reliably suppressed, and in this case, there is no need to perform operations such as drilling holes in the floor slab as compared with the case where the above-mentioned bypass ventilation pipe is provided. The configuration is simplified, and the workability is improved.

[Brief description of the drawings]

FIG. 1 is a structural view of a drainage pipe device showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a straightening pipe, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. FIG. 5 is a longitudinal sectional view of the collecting pipe in the case of using a collecting pipe as a straightening pipe, and FIG. 6 is an explanatory view of a conventional example. 3 ... Drainage standpipe, 4 ... Collecting pipe, 7 ... Horizontal main pipe, 8 ...
Rectifier tubes, 24 ... Rectifier blades.

Claims (1)

(57) [Claims] A plurality of collecting pipes each having a lower branch connected to a horizontal main pipe and a plurality of collecting pipes each having a horizontal branch pipe connected thereto are disposed at substantially equal intervals at intervals corresponding to floor heights. A drainage pipe device provided with a flow straightening vane for turning the wastewater along the inner surface of the drainage vertical pipe, wherein the straightening pipe is connected to the lowermost drainage riser that is longer than the above-mentioned distance between the lowermost collecting pipe and the horizontal main pipe. Is interposed, and inside the straightening tube,
A drain pipe device, comprising: a rectifying blade having substantially the same shape as a rectifying blade of each collecting pipe in order to impart substantially the same swirling force to each drain as to each drain pipe.