JPH0520640B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a drainage standpipe in a single-pipe drainage piping used in medium- and high-rise apartment buildings, etc., in which sewage and miscellaneous water flow into the same drainage pipe. This invention relates to improvements in drainage collecting pipes interposed therein.

(Prior art) The drainage pipe configuration of single-pipe drainage piping is to connect and penetrate a large number of drainage standpipes into a single drainage pipe from the upper floor to the lower floor, and drain the sewage and miscellaneous water from the living areas on each floor. The water flows into the drainage standpipe through the horizontal branch pipe, and the portion of the horizontal branch pipe on each floor that receives drainage is a tubular body with a larger diameter than the drainage standpipe, and a horizontal wall on the circumferential side of the pipe. A drainage collecting pipe with a protruding opening for joining the branch pipes is interposed in the drainage standpipe, but the problem with this one-pipe drainage piping is that when the wastewater flows down the drainage standpipe, Another issue is the high fluctuations in air pressure inside the pipes and the drainage noise, which increases as you move from the upper floors to the lower floors.

Conventionally, measures adopted to solve this problem include, for example, changing the shape of the large diameter pipe in the collecting pipe from a simple cylindrical shape to a constricted tube structure with at least the lower half tapered, or connecting it to a side branch pipe. For example, installing a baffle plate in that part, or installing a drainage flow control structure inside the collecting pipe. Regarding this point, the present applicant also formed a spiral blade body projecting from the inner circumferential surface of a large-diameter tubular gathering part, the width of which gradually narrowed toward the starting end and the terminal end, and of,
We have proposed a sloped circumferential surface with an upper width, lower width, and upper width (Japanese Patent Publication No. 18015/1983).

(Problems to be Solved by the Invention) The above-mentioned blade body eliminates fluctuations in the air pressure inside the pipe by swirling the flowing drainage water and generating an air core that penetrates vertically along the pipe axis. It is something. However, in conventional systems, the wastewater that has become a swirling flow due to the impeller body has already become a swirling flow and is decelerated on the sloped surface below which the drainage tends to be densest, so it does not stagnate due to swirling. There is a problem in that, due to stagnation of the drainage flow, the air core that has been formed is blocked by the drainage, causing fluctuations in the air pressure inside the pipe.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The present invention is characterized in order to solve the problems of the prior art.
The upper and lower parts of the opening joint parts 4 and 5 are formed into a tubular gathering part with a diameter larger than that of the drainage standpipes 1 and 2, and the part between the upper and lower parts of this overlapping part is a pipe-like part. In a drainage collecting pipe in which the joint part 10 of the branch pipe 9 is opened and the lower end of the collecting part has a sloped peripheral surface 3b with an upper wide and lower narrow shape, the joint part 10 of the branch pipe 9 is inclined with respect to the pipe axis for swirling the drainage flow. The blade plate 12 is provided on the sloped peripheral surface 3b at the lower end of the cluster.

(Function) Since the downstream drainage water is swirled by the vane plate 12 on the sloped peripheral surface 3b having a wide upper and lower narrow shape, it flows downward while being given a swirl, and no stagnation occurs.

(Example) The present invention will be described in detail below with reference to the illustrated embodiment. FIG. Drainage collecting pipe 3 interposed between the standpipes 2
Open joint parts 4 and 5 are formed at both upper and lower ends in the direction of the tube axis X-X line, and are connected to the compatible pipes 1 and 2 by a known water-sealing connection structure, and both joint parts 4, The main part of the pipe that connects between 5 and 5 is standpipe 1 and 2.
It is a collection of tubular bodies with a larger diameter. In this embodiment, the large diameter part from the upper part to the middle part following the open joint part 4 at the upper end of the collecting pipe 3 is a cylindrical part 3a, and the lower part from the middle part to the open joint part 5 at the lower end is a cylindrical part 3a as shown in the figure. The cylindrical portion 3a has a tapered cylindrical portion with a wide upper end and a narrower lower end, and has a sloped peripheral surface 3b inside. By providing the tongue-shaped partition plate 6 projecting downward, the drainage stream flowing down from the upper drainage standpipe 1 is directed to one side of the inner circumferential surface of the cylindrical portion 3a as shown by arrow A. A biased flow deceleration chamber 7 is formed to bias the flow in the opposite direction and decelerate the flow.
Together with the hanging length of the partition plate 6, this drifting deceleration chamber 7 occupies almost the entire upper part of the cylindrical portion 3a, and the middle portion following this drifting deceleration chamber 7 is decelerated by the partition plate 6. A collection chamber 8 is formed in which the drainage flow from the drainage standpipe 1 side and the drainage flow from the side branch pipe flowing in from the circumferential side of the cylindrical portion 3a merge. That is, the drain flow from the standpipe 1 is forced into one side of the collection chamber 8 through the biased flow deceleration chamber 7 by the partition plate 6 in the opposite direction, or the collection chamber 8 as far away as possible. One or more branch pipe joints 10 are provided in the shape of a protruding opening on the circumferential side of the pipe to be connected to a side branch pipe 9 connected to a toilet bowl or a source of gray water,
Although one piece is shown in this example, the length of the cylindrical portion 3a along the tube axis X-X line direction is increased,
Of course, it is possible to increase the length of the collecting chamber 8 and provide two or more branch pipe joints 10 at different positions and directions above and below the circumferential side of the collecting chamber 8. The lower part surrounded by the above-mentioned gently sloped peripheral surface 3b following the collecting room 8 directs the drainage flow from the drain standpipe 1 and the horizontal branch pipe 9 that are combined in the collecting room 8 to the lower part. A swirling chamber 11 is formed to allow water to flow down through the open joint 5 at the lower end on the side of the drainage standpipe 2. On the inner wall surface of the swirling chamber 11, that is, on the sloped circumferential surface 3b, there is a drainage stand indicated by arrow A. In contrast to the drainage from the pipe 1 side and the collective flow of wastewater from the horizontal branch pipe 9 shown by arrow B, the drainage standpipe 2 rotates in a spiral around the pipe axis X-X as shown by arrow C. As if flowing down,
A plurality of blade plates 12 are provided in a protruding manner. That is,
Each of these blade plates 12 is a substantially trapezoidal plate body inclined with respect to the tube axis X-X line, and is provided protrudingly provided along the vertical direction of the sloped circumferential surface 3b.
The width thereof gradually decreases from the upper end to the lower end, and they are protruded from the sloped circumferential surface 3b in an evenly spaced arrangement. The lateral branch pipe 9 and the branch pipe joint 10 are connected by a known water-tight connection structure.

In the first embodiment illustrated in FIG. 1, the collecting pipe 3 is shown as having an integral structure from the open joint 4 at the upper end to the open joint 5 at the lower end. The collecting pipe 3 can also have an upper and lower divided structure, and this will be explained in a second embodiment illustrated in FIGS. 2 to 10. In the overall view shown in FIGS. 2 and 3 and the partial views shown in FIGS. 4 to 9, the collecting pipe 3 has an upper collecting pipe 13 having an open joint 4 at the upper end, and an open joint 5 at the lower end. The lower end and the upper end of both the pipes 13 and 14 are integrally connected by a flange joint 15. That is, as shown in detail in FIG. 10, a socket rim 14a is formed at the upper end of the lower collecting pipe 14 to support the lower end of the upper collecting pipe 13, and the socket rim 14a is formed at the upper end of the lower collecting pipe 14.
4a, an overhanging flange 14b is formed, and the lower end of the upper collecting pipe 13 is inserted into the socket edge 14a, and a water sealing material 16 such as rubber is interposed between the lower end outer periphery and the overhanging flange 14b. A separate mounting flange 17, which is loosely fitted in advance into the collecting pipe 13, is connected to and supported by the water sealing material 16, and both flanges 14b,
17 are integrated by fastening them with fastening bolts 18 and nuts 19. Of course, this connection structure is merely an example. Such upper and lower collecting pipes 13 and 14 are formed by dividing the collecting pipe 3, and the pipe main body portion that connects the open joint part 4 at the upper end and the open joint part 5 at the lower end is a tubular body having a larger diameter than the vertical pipes 1 and 2. The upper collecting pipe 13 is provided with a partition plate 6 bent from the lower end of the open joint part 4 into a substantially S-shape in the illustrated example. The drifting deceleration chamber 7 is formed to be biased to one side, and in accordance with the shape of the partition plate 6, the outer circumferential wall extending approximately half the circumference of the upper collecting pipe 13 is formed into a bent projecting portion 13a as shown in the figure. Therefore, the length of the partition plate 6 is extended to the lower part of the upper collecting pipe 13. A collecting chamber 8 is formed across both pipes between the open lower end of the upper collecting pipe 13 starting from the lower end of the partition plate 6 and the open upper end of the lower joint pipe 14. Therefore, the upper part of the collecting chamber 8, etc. On the side, there is a partition plate 6 on the opposite side of the current transformation reduction chamber 7 of the upper collecting pipe 13.
A preliminary gathering chamber 8a, which is a space on the opposite circumferential side formed by the above, is formed in a communicating manner. This preliminary gathering room 8a also has a portion 8a formed on the back side of the partition plate 6 in the embodiment shown in FIG.
However, in the embodiment shown in FIG. 2, together with the formation of the partition plate 6, it is possible to form a clearer and larger space. In this FIG. 2 embodiment, the upper and lower collecting pipes 13, 1
A long gathering room 8 using the upper and lower joints of 4, and a preliminary gathering room 8a clearly formed by the shape of the partition plate 6, as shown in the figure. A plurality of branch pipe joints 10a, 10b with steps are shown in FIGS. 2, 3, 4, 5,
It can be formed as shown in Figure 6. That is, in the preliminary gathering chamber 8a on the back side of the partition plate 6, in the illustrated example, there are three upper branch pipe joints 10a having different inflow directions.
is provided in a protruding manner using the circumferential side of the upper collecting pipe 13, and in the collecting chamber 8, the lower collecting pipe 1
In the illustrated example, one branch pipe joint part 10b is also provided in a protruding shape as a lower joint part, using the circumferential side of 4, and each of these upper and lower branch pipe joint parts 1
0a and 10b are, for example, the upper branch pipe joint 10a
The lower branch pipe joint 10b can be used as a joint for a side pipe connected to a toilet bowl, and the lower branch pipe joint 10b can be used as a joint for a side pipe connected to a kitchen or other source of gray water, or vice versa. It is possible to receive various types of sewage and gray water from different directions. Lower collecting pipe 1
4 has a gathering room 8 formed using the open upper end.
Continuing from the lower end, a swirling chamber 11 surrounded by a gently sloped peripheral surface 3b is connected to an open joint 5 at the lower end.
On the sloped circumferential surface 3b of the swirling chamber 11, as shown in FIGS. 3 and 5, a groove is formed between A plurality of inclined blade plates 12 for the axial tube
- They are provided protrudingly in a circumferentially equally spaced manner in an attitude inclined with respect to the X-ray. As shown in the figure, these blades 12 are arranged as follows from the upper end to the lower end:
Its width is gradually reduced.

In the third illustrated example, the blade plate 12 is formed continuously from the sloped peripheral surface 3b to the opening joint portion 5, but it may be formed only on the sloped peripheral surface 3b.
Alternatively, it may be formed continuously from the gathering chamber 8 to the sloped peripheral surface 3b, or from the gathering chamber 8 to the opening joint portion 5 via the sloped peripheral surface 3b.

Regarding the usage of the above-mentioned collecting pipe 3, as with conventional collecting pipes of this kind, when installing drainage piping by connecting and installing drainage standpipes vertically penetrating from the upper floor to the lower floor, The collecting pipe 3 intervenes in this process, and sewage from the toilet bowl on that floor and miscellaneous waste water from the kitchen and other places flow into the collecting pipe 3 via each side branch pipe, and the waste water flows down the drain standpipe. The drainage flows from the side branch pipes are merged and collected in the collection pipe 3, and are drained continuously to the lower floor.The top part of the drainage pipe system is open to the atmosphere, and the bottom part is connected to the drainage hall as appropriate. You will be guided.

According to the collecting pipe 3 of the above embodiment, the wastewater flowing down from the upper drainage standpipe 1 flows down from the opening joint 4 to the side of the drift reduction chamber 7 guided by the partition plate 6, so that Collecting pipe 3 with curved shape
The liquid flows down toward one side of the tube circumference in the large diameter portion 3a. That is, as a result, the vertical drainage from the standpipe 1 does not flow directly into the collecting pipe 3 over the entire area of its large diameter part, and the drainage speed is reduced by the bending drift by the partition plate 6, and the air inside the pipe is reduced. In addition to preventing an increase in pressure, it also eliminates interference due to direct collision with water flowing in from the side branch pipe 9, thereby eliminating an increase in air pressure inside the pipe, and also preventing backflow to the side branch pipe 9 side. Smooth and quiet merging in the gathering room 8 with the lateral drainage flowing from the lateral branch pipe 9 via the branch pipe joints 10 to 10a can be expected. Therefore, in the next collecting room 8, the wastewater from the standpipe 1 and the inflow wastewater from the side pipe 9 are combined in a focused form, and the turbulence caused by mutual interference is small, and the air inside the pipe is Reduce pressure fluctuations,
A smooth merging effect with low drainage noise can be obtained,
The combined drainage water flows down into the swirling chamber 11 at the lowest level. This swirling chamber 11 has a cross-sectional shape that becomes narrower toward the bottom due to a gently sloped peripheral surface 3b, and a plurality of blade plates 12 that are inclined with respect to the tube axis direction are provided around the sloped peripheral surface 3b. Since the protrusions are arranged equally in the direction, the drainage flow is given swirling property through the guidance of each vane plate 12 in the part where the combined drainage water tends to be most dense, and it turns around the pipe axis and descends. As a result, water flows smoothly and quickly without causing a faucet phenomenon, and the opening joint 5
The water is accurately guided and discharged to the lower drainage standpipe 2 side through the . At this time, the rotation by the blade plate 12 can generate an air core along the pipe axis in a vertically penetrating manner, so drainage can be obtained in a stable state without changing the air pressure inside the pipe, and drainage noise can be reduced. will be obtained. In addition, since this vane plate 12 is provided protrudingly from the sloped peripheral surface 3b, together with the provision of an appropriate inclination angle in the vertical direction, the drainage flow in the swirling chamber 11 can be quickly moved without stagnation or stagnation. This will ensure that the drainage water is properly drained. Incidentally, the gentle slope of the sloped peripheral surface 3b effectively works to prevent the faucet phenomenon described above and to stabilize the air pressure.

As described above, fluctuations in the air pressure inside the pipe can be reduced and stabilized, and drainage can be smoothly flowed down with reduced noise. In other words,
According to the collecting pipe 3 of the present invention, the upper uneven flow reduction chamber 7 is formed on one side of the pipe circumference of the collecting pipe 3 through the partition plate 6;
Following this, the collecting chamber 8 where the vertical water flow is concentrated, the branch pipe joints 10 to 10a, 10b provided on the reaction peripheral side of the biased flow deceleration chamber 7, the sloped peripheral surface 3b in the lowest swirling chamber 11, and the sloped peripheral surface 3b in the lowest swirling chamber 11. Each element of the blade plate 12, which is inclined with respect to the pipe axis and projected from the surface 3b, slows down the drainage speed of the inflowing wastewater from the upper standpipe 1, and allows the water flow to move closer to one side of the pipe so that vertical and horizontal drainage can be mutually controlled. By preventing interference, it is possible to prevent an increase in the air pressure in the pipe and make its change smaller, and also to prevent the backflow of splash water, to achieve smooth mutual merging in the gathering chamber 8, and to reduce the change in the air pressure in the swirling chamber 11. This makes it possible to reliably and easily achieve stagnation-free swinging and lowering, stabilization of air pressure through continuous generation of air cores, rapid drainage, and noise reduction. This significantly reduces the problems that occur in drainage piping that performs continuous concentrated drainage, particularly in single-pipe drainage piping systems, such as large fluctuations in air pressure within the pipe and large drainage noise. At this time, the first
1, when the shape of the collecting pipe 3 is a single large-diameter cylindrical portion extending vertically and the vane plate 12 is provided protruding from this large-diameter portion, the vane plate 12 is provided. The cylindrical swirling chamber 11 is directly connected to the open joint portion 5 via the tapered portion 3b'. For this reason, there is a risk that the waste water that has been given swirling properties stagnates and stagnates while maintaining the swirling state in the tapered portion 3b'. Since the blade body 12 is provided on the circumferential surface 3b, the waste water given swirling properties flows into the drain standpipe 2 below without stagnation. Also the 12th
The figure shows an example of the results of a drainage experiment in an 11-story medium-rise building using the collecting pipe 3 of the present invention and in a single-pipe drainage pipe using a conventional collecting pipe. , Drainage flow rate from 11F is 330
8F from 1F when draining continuously at /min.
Indicates the fluctuation status of the air pressure in the pipe up to Y,
The curve indicated by Y' is the variation curve using the collecting pipe 3 of the present invention, and Z and Z' are the variation curves using the conventional collecting pipe. In the figure, the right side of the center line indicating each floor in the center is the +P value of air fluctuation, and the left side is the -P value (both mmAg values), with a tolerance of ±25 mm.
As for Ag, the one of the present invention is superior to the conventional one, and it has been found that it is particularly superior to the lower floors.

(Effects of the Invention) According to the collecting pipe according to the present invention, the vane plate inclined with respect to the pipe axis for swirling the drainage flow is provided on the sloped peripheral surface of the lower end of the collecting pipe in the shape of a large diameter pipe. , stagnation of the drainage flow does not occur, and fluctuations in the air pressure inside the pipe can be reliably prevented due to the air core penetrating vertically along the pipe axis.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of an embodiment of the collecting pipe of the present invention, Fig. 2 is a front view of the same split type embodiment, Fig. 3 is a longitudinal sectional front view of the same, Fig. 4 is a view taken from Fig. 3 - line arrows, Fifth
6 is a partial sectional view taken along the same line, FIG. 7 is a partial sectional view taken along the same line, FIG. 9 is a plan view showing the flange of the lower collecting pipe, Fig. 10 is a side sectional view of the upper and lower connecting parts, Fig. 11
The figure is a side cross-sectional view of an example of a conventional collecting pipe, and FIG. 12 is a graph of experimental results of air pressure fluctuations in the pipe of the present invention and the conventional example. 1, 2...Drainage standpipe, 3...Collecting pipe, 3b...
Gradient peripheral surface, 4, 5...opening joint, 9...lateral branch pipe, 10...branch pipe joint, 12...blade plate.

Claims (1)

[Claims] 1 The upper and lower ends are the opening joints 4 and 5 for joining the drainage standpipes 1 and 2, and the space between the upper and lower opening joints 4 and 5 is a collection of pipes with a larger diameter than the drainage standpipes 1 and 2. A joint part 10 of the branch pipe 9 is opened midway between the upper and lower parts of this collecting part, and the lower end of the collecting part has a sloped circumferential surface 3b with a narrow top and bottom. A drainage collecting pipe characterized in that a vane plate 12 inclined with respect to the pipe axis for swirling the flow is provided on the sloped circumferential surface 3b at the lower end of the collecting pipe.