JPS62288795A - Collecting pipe for drainage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to a single pipe used in medium- and high-rise housing complexes that drains sewage and gray water into the same drainage pipe. This invention relates to improvement of a drainage collecting pipe interposed in a drainage branch pipe in a type drainage piping.

(Prior art) The drainage pipe configuration of single-pipe drainage piping is to connect and pass through a large number of drainage branch pipes into a single drainage pipe from the upper floor to the lower floor, and drain sewage and miscellaneous water from the living areas on each floor. The water flows into the drainage branch pipe through a branch pipe, and at this time, the part of the horizontal branch pipe on each floor that receives drainage is a tubular body with a larger diameter than the drainage branch pipe, and the horizontal branch pipe is attached to the peripheral side of the pipe. A drainage collection pipe with a protruding joining opening is interposed in the drainage branch pipe, but the problem with this pipe-type drainage piping is that as the wastewater flows down the drainage branch pipe, it does not reach the upper floors. These are the high fluctuations in air pressure inside the pipes and the noise from the drainage, which increases as you move down to the lower floors.

Conventionally, means 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 diaphragm structure with at least the lower half tapered.
This includes installing a baffle plate at the connection with the side branch pipe, or installing a drainage flow control structure inside the collecting pipe. Regarding this point, the present applicant also formed a protruding spiral blade body with a middle member gradually narrowing toward the starting end and terminal end on the inner circumferential surface of a large-diameter tubular gathering part, and proposed a sloped circumferential surface with an upper width, lower width, and upper width.
-18015).

(Problems to be Solved by the Invention) The above-described blade body eliminates fluctuations in 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 the conventional system, the drainage that has become a swirling flow due to the blade body is generated on the sloped peripheral surface where the drainage below is likely to be densest.
Since the flow has already become a swirling flow and has been decelerated, the swirling causes stagnation, and the stagnation of the drainage flow causes the air core that has been formed to be blocked by the drainage, causing fluctuations in the air pressure within the pipe.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The present invention is characterized in that it solves the problems of the prior art. , the upper and lower portions of the both opening joint portions 4.5 are made into a tubular gathering portion with a larger diameter than the drainage branch pipes 1 and 2,
A junction 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 that is wide at the top and narrow at the bottom, and swirls the drainage flow. The vane plate 12, which is inclined with respect to the tube axis, is provided on the sloped peripheral surface 3b at the lower end of the collection.

(Function) Since the downstream drainage water is swirled by the blade 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.

(Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment. FIG. 1 shows a first embodiment of a drainage collecting pipe according to the present invention, in which an upper drainage branch pipe 1 and a lower drainage branch pipe are connected. The drainage collecting pipe 3 interposed between the two has open joints 4 and 5 formed at both upper and lower ends in the direction of the pipe axis X-X line, which are connected to both the branch pipes 1.2 by a known water-sealing connection structure. Along with
The tube main body portion that connects both the joint portions 4.5 is a gathering portion of tubular bodies having a diameter larger than that of the branch tubes 1 and 2. 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 open joint part 5 from the middle part to the lower end.
As shown in the figure, the lower part is a tapered cylindrical part with a wide top and a narrow bottom, and has a gently sloped circumferential surface 3b inside. By providing a tongue-shaped partition plate 6 that hangs downward from the side toward the pipe axis A biased flow deceleration chamber 7 is provided to bias the flow toward one side of the inner peripheral surface of the cylindrical portion 3a and decelerate the flow. Coupled with the hanging length of the partition plate 6, this drift reduction chamber 7 occupies almost the entire upper part of the cylindrical portion 3a. A collection chamber 8 is formed in which the drainage flow from the side and the drainage flow from the side branch pipe flowing in from the circumferential side of the cylindrical portion 3a merge. That is, in the opposite direction of the drainage flow from the branch pipe 1 which is biased toward one side of the collection chamber 8 through the biased flow deceleration chamber 7 by the partition plate 6, or around the collection chamber 8 as far away from this as possible. One or more branch pipe joints 10 are provided in the form of a protruding opening on the side to be connected to a side branch pipe 9 connected to a toilet bowl or a gray water source, and in this example, only one branch pipe is shown. However, the cylindrical part 3
The length along the tube axis X-X line direction of a is increased, and the gathering room 8
It is of course possible to provide two or more branch pipe joints 10 with a thicker length (but with different positions and directions on the upper and lower sides of the circumference of the collecting room 8. The lower part surrounded by the gently sloped circumferential surface 3b described in 2 is connected to the opening joint 5 at the lower end to direct the drainage flow from the drainage branch pipe 1 and the horizontal branch pipe 9 that are combined in the gathering room 8 to the lower drainage branch pipe 2 side. The inner wall surface of this swirling chamber 11, that is, the sloped peripheral surface 3b, has drainage water from the drainage branch pipe 1 side shown by the arrow (A), an arrow ([1] ) For the collective flow of wastewater from the horizontal branch pipe 9 shown in arrow (c), a plurality of sheets are arranged so that they flow down the drainage branch pipe 2 while turning in a spiral around the pipe axis X-X line, as shown by the arrow (c). The blade plate 12 is provided in a protruding manner.

That is, each of these vanes 12 is a substantially trapezoidal plate body that is inclined with respect to the tube axis The inner parts are gradually made smaller as they reach the upper part, and are arranged to protrude evenly in a straight line on the sloped circumferential surface 3b. 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
Although the collecting pipe 3 according to the present invention is shown as having an integral structure from the open joint part 4 at the upper end to the open joint part 5 at the lower end, it is also possible to have a structure in which the collecting pipe 3 is divided into upper and lower parts. This will be explained in a second embodiment illustrated in FIG. 2 and FIG. 10. In the overall view shown in Fig. 2.3 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 collecting pipe 140 is divided into both pipes 13 and 14, and the lower and upper ends of both pipes 13 and 14 are integrally connected by a flange joint 15. That is, as shown in detail in FIG. 10, a socket edge 14a for supporting the lower end of the upper collecting pipe 13 is formed at the upper end of the lower collecting pipe 14, and
A flange 14b is formed to protrude following the socket edge 14a, 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 outer periphery of the lower end and the protruding flange 14b. Then, the separate mounting flange 17 loosely fitted in advance to the upper collecting pipe 13 is fitted onto the water sealing material 16, and both flanges 14b.

17 are integrated by fastening with a fastening hole 8 nut 19. Of course, this connection structure is merely an example. In the collecting pipe 3 formed by dividing the upper and lower collecting pipes 13 and 14, the open joint 4 at the upper end
The pipe main body portion that connects the opening joint 50 at the lower end is the branch pipe 1.
．． 2, and the upper collecting pipe 13
A partition plate 6 bent into a substantially S shape in the illustrated example is provided from the lower end of the opening joint 4, so that the biased flow reduction chamber 7 similar to the embodiment in FIG. 1 is pushed to one side. done,
In this case, corresponding to the shape of the partition Fi6, the outer circumferential wall extending approximately half the circumference of the upper collecting pipe 13 is made into a bent protruding part 13a as shown in the figure, and the length of the partition plate 6 is also set at the lower part of the upper collecting pipe 13. It is formed to be extended for a long time. A collecting chamber 8 is formed across both pipes between the open lower end starting from the lower end of the partition plate 6 of the upper collecting pipework 3 and the open upper end of the lower joint pipe 14. Therefore, the upper part of the collecting room 8, etc. On the side, there is an upper collecting pipe 13
A preliminary collection chamber 8a, which is a space on the opposite side of the drifting deceleration chamber 7, that is, on the opposite peripheral side defined by the partition plate 6, is formed in a communicating manner. This preliminary gathering room 8a is also formed as a portion 8a created on the back side of the partition plate 6 in the embodiment shown in FIG. 1 described above, but in the embodiment shown in FIG. Combined with the shape of 6, it is possible to form a clearer and larger space. This second
In the example shown in the figure, by clearly forming a long collecting chamber 8 using the upper and lower joint portions of the upper and lower collecting pipes 13, 14, and furthermore, by clearly forming a preliminary collecting chamber 8a by the shape of the partition plate 6, both the collecting pipes 13 and 14 can be assembled as shown in the figure. By utilizing the chambers 8, 8a, a plurality of branch pipe joints 10a and lobs with steps above and below can be formed as shown in Figs. 2.3 and 4.5.6. That is, in the preliminary collecting chamber 8a on the back side of the partition plate 6, in the example shown in the figure, three upper branch pipe joints 10a, each having a different inflow direction, are formed in a protruding shape using the circumferential side of the upper collecting pipe 13. In addition, in the collecting room 8, by utilizing the peripheral side of the lower collecting pipe 14, in the illustrated example, one branch pipe joint part 10b is also provided in a protruding shape as a lower joint part. For example, each of the branch pipe joint parts 10a and 10b is connected to the upper branch pipe joint part 10a.
as a connection for a side branch pipe connected to the toilet, and the lower branch pipe joint 10b as a connection for a side branch pipe connected to a kitchen or other source of gray water, or vice versa. It is possible to receive inflows of sewage and gray water from multiple directions and of various types.

Continuing to the lower end of the collecting chamber 8 formed using the open upper end of the lower collecting pipe 14, a swirling chamber II surrounded by a gently sloped peripheral surface 3b is provided between the lower end and the open joint 5. The sloped peripheral surface 3 in this swirling chamber 11 is formed over
As shown in FIGS. 3 and 5, on b, there are provided
The plurality of inclined blade plates 12 are in an attitude inclined with respect to the tube axis X=X line, similar to the embodiment in FIG.
They are provided in a protruding manner so as to be equally spaced in the circumferential direction. As shown in the figure, the inner parts of these blades 12 gradually become smaller from the upper end to the lower end.

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

Regarding the usage of the above-mentioned collecting pipe 3, similar to the conventional collecting pipe of this kind, when installing drainage piping by connecting and standing drainage branch pipes vertically through the upper and lower floors, this collecting pipe is installed on each floor. The pipe 3 is intervened, and the sewage from the toilet bowl on that floor and gray water from the kitchen and other places flow into the collecting pipe 3 through each side branch pipe, and the drainage flow flowing down the drainage branch pipe and the side branch pipe The wastewater flows are combined in the collecting pipe 3 and drained successively to the lower floor side, and the top of the drainage pipe system is open to the atmosphere, and the bottom part is guided to a drainage hall as appropriate. It turns out.

According to the collecting pipe 3 of the above embodiment, the wastewater flowing down from the upper drainage branch pipe 1 flows down from the opening joint 4 to the side of the drift reduction chamber 7 guided by the partition plate 6, thereby reducing the curvature of the partition plate 6. Coupled with the shape, the pipe circumference at the large diameter section 3a of the collecting pipe 3 -
It will be pushed to the side and flow down. That is, as a result, the vertical drainage from the branch pipe 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 caused by the partition plate 6, thereby preventing an increase in the air pressure inside the pipe. At the same time, it also eliminates interference due to direct collision with the inflow water from the side branch pipe 9, and eliminates the increase in air pressure inside the pipe.
It is also possible to prevent backflow to the side branch pipe 9.
Therefore, smooth and quiet merging in the collecting room 8 with the lateral drainage water flowing in through the branch pipe joints 10 to 10a can be expected. Therefore, in the next collection chamber 8, the drainage water from the branch pipe 1 and the inflow drainage water from the side branch pipe 9 are combined in a focused manner, and the turbulence caused by mutual interference is small.
By reducing fluctuations in the air pressure inside the pipe, a smooth merging effect with low drainage noise can be obtained, and the combined drainage water flows down into the lowest swirling chamber 11. It 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 protruded from the sloped peripheral surface 3b equally in the circumferential direction. Therefore, in the part where the combined drainage water is most likely to be dense, the drainage flow is given swirling property through the guidance of each vane plate 12, and turns around the pipe axis and descends. The water flows down smoothly and quickly without causing a plug phenomenon, and is accurately guided and discharged to the lower drainage branch pipe 2 side through the opening joint 5. At this time, the rotation by the blade plate 12 moves the pipe axis in a vertically penetrating manner. Since an air core can be generated along the line, drainage can be obtained in a stable state without fluctuating the air pressure inside the pipe, and drainage noise can be reduced.

In addition, since the blade plate 12 is provided protruding from the sloped peripheral surface 3b, in combination with the provision of an appropriate slope angle in the vertical direction, the drainage flow in the swirling chamber 11 is quickly prevented from stagnation or stagnation. Drainage discharge will be ensured. 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. That is, according to the collecting pipe 3 of the present invention, there is an upper unbalanced flow deceleration chamber 7 created on the circumferential side of the collecting pipe 3 through the partition plate 6, followed by a collecting chamber 8 where the vertical water flow is concentrated, and an unbalanced flow reduction chamber 7. Branch pipe joint 10 provided on the opposite peripheral side of the deceleration chamber 7
to 10a.

10b, a sloped peripheral surface 3b in the lowest turning chamber 11;
A vane plate 12 inclined with respect to the tube axis protruding from the sloped peripheral surface 3b
These elements reduce the drainage speed of the inflowing wastewater from the upper branch pipe 1, and prevent mutual interference between vertical and horizontal drainage due to water flow approaching one side of the pipe, thereby preventing an increase in air pressure in the pipe and making changes in it more effective. In addition, it prevents the backflow of splashing water and allows for smooth mutual merging in the gathering chamber 8, as well as smooth downward movement in the swirling chamber 11, stabilization of air pressure by continuous generation of air cores, and prevention of drainage. This makes it possible to achieve speed and noise reduction reliably and easily, and to solve problems that occur in drainage piping systems that perform continuous and concentrated drainage from multiple floors, especially in pipe-type drainage piping systems. This significantly reduces the large fluctuations in air pressure within the pipe and the large drainage noise. At this time, as shown in Figure 11, when the shape of the collecting pipe 3 is a single large-diameter cylindrical part with a large diameter extending upward and downward, and the vane plate 12 is provided protruding from this large-diameter part, the vane plate A cylindrical swirling chamber 11 provided with 12 is directly connected to the open joint 5 via a tapered portion 3b''.

For this reason, there is a risk that the waste water that has been given swirling properties will stagnate while maintaining the swirling state in the tapered portion 3b'', causing stagnation. Since the blade body 12 is provided on the circumferential surface 3b, the water that has been given swirling properties can flow downward into the drainage branch pipe 2 without stagnation.
flowing down. Furthermore, Fig. 12 shows an example of the results of a drainage experiment using the collecting pipe 3 of the present invention and a single-pipe drainage pipe using a conventional collecting pipe in an 11-story medium-sized building. The drainage flow is 1 from the 11th floor.
In the case of continuous drainage at 3301/min, the fluctuation situation of the air pressure inside the pipe from IF to 8F is shown, and the curves indicated by Y and Y' are the fluctuation curves using the collecting pipe 3 of the present invention, z, z
' shows the fluctuation curve of the conventional system using a 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)
As for the tolerance ratio ±25 mmAg, it was found that the product of the present invention is superior to the conventional product, and is particularly superior to the conventional product as it reaches 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 up and down along the pipe axis.

[Brief explanation of drawings]

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, and Fig. 4 is a longitudinal sectional front view of the embodiment of the collecting pipe according to the present invention.
The figure is a view taken along the line rV-rV in Figure 3, and Figure 5 is a view taken along the line V-V in Figure 3.
Fig. 6 is a partial sectional view taken along the Vl-Vl line, Fig. 7 is a partial cross-sectional view taken along the ■-■ line, and Fig. 9 is a plan view showing the flange of the lower collecting pipe. FIG. 10 is a side cross-sectional view of the upper and lower joints, FIG. 11 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 pipes of the present invention and the conventional example. . 1.2-drainage branch pipe, 3-collecting pipe, 3b-slope peripheral surface, 4.
5 - Opening joint, 9 - Lateral branch pipe, 10 - Branch pipe joint, 12 - Vane board.

Claims (1)

[Claims] (1) The upper and lower ends are the opening joint 4 for joining the drainage branch pipes 1 and 2.
. In a drainage collecting pipe in which the lower end of the collecting part has a sloped circumferential surface 3b with an upper wide and lower narrow shape, a vane plate 12 inclined with respect to the pipe axis for swirling the drainage flow is provided with the A drainage collecting pipe characterized in that it is provided on a sloped circumferential surface 3b at the lower end of the collecting pipe.