JPH0374730B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an intermediate drainage joint for a two-layer pipe that serves as a drainage path and a ventilation path for connecting a drainage horizontal branch pipe to a two-layer standpipe system in a drainage standpipe system of a high-rise or super high-rise building.

[Conventional technology]

In this type of piping, the standpipe and side branch pipe are connected with intermediate drainage joints such as Y-shaped pipes or T-shaped pipes, and the drainage piping is designed so that the wastewater flows as smoothly as possible to the standpipe.
It supplements air as the air layer increases and decreases for drainage, maintains a state close to atmospheric pressure at all times, prevents damage to the drainage traps of each device connected to the side pipe, and smoothes the flow of drainage. A piping system with ventilation pipes was used for this purpose. In particular, in mid-to-high-rise buildings, a separate three-pipe system is used for miscellaneous water, standpipes for sewage from toilets, and ventilation pipes, as well as drainage standpipes and ventilation standpipes. an elongated ventilation pipe connected at the top floor, and a joint ventilation pipe connected at key points on intermediate floors;
For drainage side pipes and ventilation standpipes, there are circuit ventilation pipes and relief ventilation pipes to enhance the functions of the circuit ventilation pipes, but ventilation standpipes, combined ventilation pipes, and relief ventilation pipes are adopted from the viewpoint of construction and cost. Usually, this is handled by a built-in drainage and ventilation piping system. In addition, these systems are mainly intended for residential units in apartment complexes or guest rooms in hotels, etc., and use so-called special drainage joints at the joints of drainage standpipes and appliance drainage pipes or drainage horizontal branch pipes to ensure ventilation. There are also various combined single-pipe systems that do not require standpipes. According to these conventional examples, as shown in FIG. Since it is connected to the utility standpipe 5, the joint ventilation pipe 7, and the circuit ventilation pipe 8,
The internal pressurized air and negative pressure air generated by the drainage flowing down in the drainage horizontal branch pipe 3 can be communicated to the atmosphere through the ventilation standpipe 5 and the top ventilation pipe 6, and as a result, Problems such as backflow of pressurized air inside the pipe due to drainage, suction, and breakage of the trap seal water are avoided. Therefore, when the wastewater generated from the drainage equipment 2 on each floor is collected in each drainage horizontal branch pipe 3 and discharged to the sewer through the drainage standpipe 1 and the lower horizontal drainage main pipe 9,
It is difficult for a pressure difference to occur in the drain standpipe 1, and the drain in the drain standpipe 1 can be drained safely and quickly, and each trap of each drainage device 2 can be sealed. It is.

[Problems to be solved by the invention]

However, in these conventional three-pipe and two-pipe drainage standpipe systems, when the wastewater flows into the drainage standpipe from the drainage horizontal branch pipe, it collides with the inner wall of the drainage standpipe, resulting in a flow problem. The turbulent flow not only fluctuates the pressure inside the pipe and obstructs the flow of ventilation inside the pipe, but also makes it difficult to drain water smoothly and generates noise such as the sound of drainage. Further, the ventilation standpipe must be installed separately from the drainage standpipe, and the connection structure using the coupling ventilation pipe, the circuit ventilation pipe, etc. is complicated. In addition, special fittings or cleaning hardware must be installed in the piping for test work such as full-water tests and for clogging with oil deposits and foreign substances contained in wastewater, and testing work requires considerable time and effort. He was stiff. Therefore, not only does piping construction work require a considerable amount of time and expense, but also a large piping space is required, making construction and installation in a narrow space extremely difficult. In addition, in order to prevent dew condensation from forming on the outside of the drainage standpipe 1 and side branch pipe joint 4 in Fig. 13, it is necessary to protect them from the outside. It was common practice to perform the troublesome additional work of covering the outer periphery of the joint 4 with a heat insulating material. Conventionally, a special structure such as a baffle plate or a blade was installed in the joint of the drainage horizontal branch pipe to the drainage standpipe, and the structure was configured to give a swirling flow to the flow of wastewater from the drainage horizontal branch pipe into the drainage standpipe. By using special joints,
A one-pipe water standpipe system has also been devised in which the ventilation standpipe can be omitted. However, the special structure inside the special joint can become an obstruction, causing clogging with solid matter, and the circuit ventilation pipe method cannot be used, so it cannot be applied to toilets in general buildings with long horizontal drainage pipes. Ta. Also, as the scale of the building increases, such as the number of floors,
There was a problem that the ventilation function could not be fully satisfied. This invention was made in order to solve the above problems, and is a joint structure adopted in a substantially one-pipe drainage vertical pipe system, which can reliably prevent turbulent flow of drainage and reduce noise associated with it. At the same time, the ventilation slit provides a relief ventilation function that is extremely difficult to employ in conventional piping systems due to cost considerations, and also has a combined ventilation function that enhances the circuit ventilation function and eliminates the joint ventilation pipe. The purpose of the present invention is to provide an intermediate drainage joint for a two-layer pipe that can fully satisfy the ventilation function of a drainage standpipe and a drainage horizontal branch pipe, and allows easy testing, maintenance, and inspection work.

[Means to solve the problem]

The intermediate drainage joint for two-layer pipes of the present invention connects a drainage standpipe and a drainage horizontal branch pipe on each floor, and has a joint structure consisting of a two-layer pipe, an outer pipe and an inner pipe, and the inside of the inner pipe is While draining water as a drainage route, the main part of the inner pipe has a ventilation slit and an opening for inspection that communicates with the inner pipe through the outer pipe, and the ventilation route formed between the outer pipe and the inner pipe is used as a drainage route. The structure is designed to allow for ventilation, as well as for test work, maintenance, and inspection.

[Effect]

Since the intermediate drainage joint for a two-layer pipe of the present invention has a two-layer pipe structure as described above, it can be incorporated into a drainage standpipe to essentially constitute a one-pipe drainage standpipe system. . However, sufficient ventilation is provided by the drainage path at the joint between the drain standpipe and the drainage horizontal pipe, and by the ventilation path formed on the outer periphery of the drainage path. In addition, it has the function of increasing the circuit ventilation function and the combined ventilation function while omitting the combined ventilation piping, making test work and maintenance inspection work easier, and the ventilation path is a shielded space for sound insulation and dew prevention of the drainage path. becomes.

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. In the two-layer standpipe system shown in FIG. 1, 10 is an upstream drainage standpipe, 11 is a downstream drainage standpipe, and these drainage standpipes 10 and 11 are as follows:
It has a two-layer tube structure consisting of an inner tube 12 that forms a drainage path A within the tube, and an outer tube 13 that forms a ventilation path B between the outer peripheral surface of the inner tube 12. 14
is an intermediate drainage joint for a two-layer pipe for interconnecting the drainage standpipes 10 and 11 on the upstream side and the downstream side, and for connecting the drainage horizontal branch pipe 21. This intermediate drainage joint 14 for two-layer pipe has a joint inner pipe 1
5 and a joint outer pipe 16, the above-mentioned drainage standpipe 1
It has a two-layer tube structure that corresponds to 0 and 11. The inner joint pipe 15 and the outer joint pipe 16 are arranged substantially concentrically with the upper and lower drainage standpipes 10 and 11 with respect to their tube cores. The outer joint tube 16 and the inner joint tube 15 have a substantially hopper-like shape in which the lower openings thereof are gradually tapered and have a smaller diameter than their upper openings. That is, in this embodiment, the joint inner pipe 15
However, it has a cylindrical main pipe part 19 connected to the upper end opening, and a hopper part that tapers smoothly and gradually from the lower end of this main pipe part 19 to the lower end of the joint inner pipe 15. . Correspondingly, the joint outer pipe 16 also has a shape that is substantially similar to the joint inner pipe 15. In this embodiment, the outer joint pipe 16 has a cylindrical portion corresponding to the main pipe portion 19 of the inner joint pipe 15, and a tapered downstream connecting pipe portion 33 continuing downward from the cylindrical portion. The diameter of the upper end opening of the joint outer pipe 16 is larger than the outer diameter of the outer pipe 13 of the upstream drainage standpipe 10. At least a portion of the upper end opening of the joint outer pipe 16 extending outward from the outer diameter of the upstream drainage standpipe 10 is closed by an annular upper end closing wall. This upper end closing wall has a rising cylindrical portion 32 on the inside.
The inside of the joint outer pipe 16 and the inside of the outer pipe 13 in the upstream drainage standpipe 10 are sealed from the outside. The diameter of the upper end opening of the joint inner pipe 15 is larger than the outer diameter of the inner pipe 12 of the upstream drainage standpipe 10, and the upper end opening of the joint inner pipe 15 is connected to the ventilation path in the upstream drainage standpipe 10. B is intermediate drainage joint 14 for double-layer pipe.
In order to communicate with the internal ventilation path, the joint outer pipe 16
It is located below the upper end opening of. Thereby, the drainage path in the joint inner pipe 15 communicates with both the drainage path A and the ventilation path B of the upstream drainage standpipe 10. Further, the lower end portion of the joint outer pipe 16, that is, the downstream connecting pipe portion 33 is connected to the outer pipe 13a of the downstream side drainage standpipe 11.
In addition, the lower ends of the joint inner pipes 15 are respectively joined to the upper ends of the inner pipes 12a of the downstream side drainage standpipe 11, so that the drainage route and the ventilation route in the intermediate drainage joint 14 for double-layer pipes are respectively , are connected to the drainage path A and the ventilation path B of the downstream side drainage standpipe 11. Further, at a portion of the inner joint pipe 15, particularly near the upper end of the inner wall surface of the main pipe portion 19, there is provided a distal end of at least one branch pipe 20 that passes through the outer joint pipe 16 and connects to an external drainage horizontal branch pipe 21. has a through opening.
The pipe core of this branch pipe 20 is arranged so that the waste water flowing into the joint inner pipe 15 from this branch pipe 20 flows down while swirling along the inner surface of the joint inner pipe 15. It is configured to extend to an eccentric position from the center. In this embodiment, the pipe core of the branch pipe 20 is parallel to a tangent on the circumference of the main pipe portion 19 in the joint inner pipe 15. According to the main feature of the invention, the joint inner pipe 1
5, the lower part of the inner pipe 12 of the upstream drainage standpipe 10 enters, and as a result, the inner pipe 1 of the upstream drainage standpipe 10
The lower end opening of 2 is located below the upper end opening of the joint inner pipe 15, and therefore, the wastewater flowing down from the drainage path A of the upstream drainage standpipe 10 into the joint inner pipe 15 flows inside the joint. Splashing to the outside from the upper end opening of the tube 15 is almost eliminated. The upper end opening of the joint inner tube 15 is closed by an annular upper end closing wall having a slit-shaped ventilation relay port 22 . An upstream joint opening 17 is provided in the center of the upper end closing wall for the joint inner pipe 15, through which the lower part of the inner pipe 12 of the upstream drainage standpipe 10 passes. It is fitted. The upper end closing wall for the joint inner pipe 15 reliably prevents the waste water inside the joint inner pipe 15 from scattering into the ventilation path. As described above, the pressurized air that has flowed into the joint inner pipe 15 from the upstream drainage standpipe 10 and the drainage horizontal branch pipe 21 together with the waste water is separated from the waste water in the joint inner pipe 15 and ventilated. It can escape through the relay port (slit) 22 into the ventilation path B in the upper and lower drainage standpipes 10 and 11. Similarly, drain standpipe 1
0, 11 and the negative pressure in the drainage lateral branch pipe 21 can also be communicated to the atmosphere via the joint inner pipe 15. The upper end closing walls of the inner joint pipe 15 and the outer joint pipe 16 are provided with inspection openings 23 and 24 for carrying out internal inspections and full water tests of the drainage lateral branch pipe 21 route from outside the joint body. It is provided. The inspection openings 23 and 24 have an inspection lid 2.
5 is provided. This inspection lid 25 consists of an outer lid 27 with a gasket, which has a larger diameter than the inspection opening 23 on the side of the joint outer pipe 16, and has a hooking recess 26 on the back side, and an outer lid 27 with a gasket on the back side of the joint inner pipe 15. It has a double lid structure consisting of an inner lid 29 with a gasket, which is larger in diameter than the inspection opening 24 and integrally has a rising rod 28 in the center. The above-mentioned latching recess 26 is located at the upper end of the rising rod 28.
The latching piece 30 latched to the outer lid 2 is
A handle 31 is provided on the front side of each 7. Then, by pushing the outer cover 27 around with this pusher 31, the outer cover 27 and the inner cover 29 make the inspection openings 23 and 24 airtight, and the outer cover 27 and the inner cover 29 can be integrally attached and detached. The branch pipe 20 passes through the middle of the joint outer pipe 16, and the branch pipe 20 has its extraction position at an angle of 90° or more with respect to the pipe core, that is, as shown in FIGS.
In the figure, one branch pipe 20 is shown, and in FIG.
Four branch pipes 20 are connected at 90° intervals,
It can be either. The tip of the branch pipe 20 is shown in FIGS. 9 and 10.
As shown in the figure, the branch has a closing wall, and the distal end closing wall is provided with a plurality of circular grooves 34 to 36 according to pipe diameters corresponding to each pipe diameter of the drainage horizontal branch pipe 21 having various diameters. A joint 37 is attached. This branch joint 37 is connected to the drainage horizontal branch pipe 2 to be connected.
A circular cut groove having a diameter corresponding to the diameter of the pipe 1 is cut out to form a hole, and the pipe can be fitted and engaged into the hole via a packing. Further, the branch pipe 20 is attached to the branch joint 37.
A stopper piece 38 is provided which is brought into pressure contact with the distal end closing wall. Incidentally, in the illustrated example, the circular kerfs 34 to 36 according to pipe diameter are formed in an eccentric circle shape in which a part of the circumference of each circular kerf group coincides with each other, but each circular kerf groove is formed in a concentric circle shape. It may be formed as follows. The upstream inner pipe 12 and the downstream inner pipe 1 are connected to the joint inner pipe 15 in the intermediate drainage joint 14 for two-layer pipes.
2a is connected to the upstream outer pipe 13 and the downstream outer pipe 13a through the joint outer pipe 16, and is also connected to the drainage horizontal branch pipe 21 through the branch pipe 20. Next, the action will be explained. While drainage water flows into the joint inner pipe 15 of the intermediate drainage joint 14 for two-layer pipes from the upstream drainage standpipe 10, drainage water also flows into the joint inner pipe 15 from the drainage horizontal branch pipe 21. At this time, the drainage water from the drainage horizontal branch pipe 21 is sent in a tangential direction along the inner circumferential surface of the joint inner pipe 15, so that a swirling flow of the drainage water is generated within the joint inner pipe 15. Since the upper air layer in the joint inner pipe 15 communicates with the ventilation path B through the slit 22, sufficient ventilation performance is obtained in the drainage path A, and the drainage is prevented from turbulent flow. It flows smoothly down and is discharged out of the system without causing any problems. Therefore, although it is essentially a one-pipe drainage system, it provides smooth and highly functional drainage effects, and also has the effect of increasing the circuit ventilation function and the combined ventilation function while omitting the combined ventilation piping.
It is possible to create a piping system that facilitates test work and maintenance and inspection work, and in which the ventilation route forms a cutoff space for sound insulation and dew prevention of the drainage route. Incidentally, FIG. 12 shows the experimental results of a piping system using the intermediate drainage joint for double-layer pipes of the present invention. In this figure, the vertical axis represents the number of floors, and the horizontal axis represents the amount of change in air pressure inside the pipe (mmAq) when a drainage load is applied by flowing wastewater. 300, 330 and 360/min
This is a plot of the changes in atmospheric pressure on the 1st, 2nd, and 3rd floors when water is discharged. In the figure, the figures in the left and center columns show the case where drainage is supplied from the top floor, and the figures in the right column show cases in which drainage is supplied from intermediate floors, respectively.The figures show the case where the trap seal is broken due to fluctuations in the pressure inside the pipe. There is no seal and the permissible drainage volume is larger than that of existing drainage systems, indicating that the present invention has high performance.

【Effect of the invention】

As described above, according to the intermediate drainage joint for double-layer pipes of the present invention, it is possible to realize a substantially one-pipe piping system, and moreover, the drainage from the drainage horizontal branch pipe is forcibly subjected to centrifugal force. By flowing down along the inner wall of the main pipe section of the inner pipe, water and air are reliably separated, forming an air core that communicates with the extension ventilation pipe at the upper end while drainage flows down the inner pipe section of the standpipe. do,
In addition to promoting the circulation of air inside the pipe, the ventilation slit at the attachment part of the drainage side branch pipe takes in air from the ventilation path when the pressure inside the pipe is negative, and when the pressure inside the pipe is positive, it discharges pressurized air to reduce the pressure inside the pipe. This increases the effect of maintaining the pressure at approximately atmospheric pressure, thereby maximizing the ventilation effect by protecting the inertia caused by the blowing out and suction of the seal water from the instrument trap or the movement of the seal water due to fluctuations in the internal pressure of the pipe. It is possible to provide a high-performance drainage system that is more expensive than a two-pipe system, a three-pipe system, or a single-pipe system using special joints. In particular, it prevents the unpleasant noise that occurs when draining water, protects the water seal by maintaining the pressure inside the pipe at atmospheric pressure, prevents the emission or release of odors due to the breakage of the trap seal, and also prevents detergent drainage. By transporting wastewater quickly and smoothly, complaints from low-rise residents in apartment complexes can be completely addressed. In addition, in terms of overall functions, it has high sound insulation properties, does not require heat insulation, improves workability and maintenance management, and can penetrate fireproof compartments and absorb expansion and contraction of pipes due to heated drainage. This system does not generate any expansion/contraction noise, and is also highly economical.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a two-layer standpipe system according to an embodiment of the present invention, Figs. 2 and 3 are enlarged sectional views of the same main parts, and Fig. 4 is an intermediate drainage joint for a two-layer pipe. 5 is a plan view of the same, FIG. 6 is a sectional view taken along the - line in FIG. 4, FIG. 7 is an explanatory diagram of the operation of FIG. 4, FIG. 10 is a front view of a branch joint for connecting a drainage horizontal branch pipe, FIG. 11 is a plan view of an intermediate drainage joint for a two-layer pipe according to another embodiment, and FIG. 12 13 is a table showing experimental data, and FIG. 13 is a piping diagram of a conventional one-pipe drainage standpipe system. In the figure, 10 and 11 are drainage standpipes, 12 is an upstream inner pipe, 12a is a downstream inner pipe, 13 is an outer pipe, 1
3a is a downstream outer pipe, 14 is an intermediate drainage joint for two-layer pipes, 15 is a joint inner pipe, 16 is a joint outer pipe, 17 is an upstream joint opening, 18 is a downstream joint opening, 19
20 is a main pipe, 20 is a branch pipe, A is a drainage route, and B is a ventilation route.

Claims (1)

[Claims] 1. Upstream drainage standpipes 10 arranged vertically in one row.
and an intermediate drainage joint 14 for a two-layer pipe that interconnects a downstream drainage standpipe 11, wherein the upstream and downstream drainage standpipes 10, 11 have an inner pipe 12 forming a drainage path A inside; The intermediate drainage joint for two-layer pipes has a two-layer pipe structure consisting of an outer pipe 13 that surrounds the inner pipe 12 and forms a ventilation path B between the outer peripheral surface of the inner pipe 12 and its inner surface. 14
a joint inner pipe 15 forming a drainage path inside;
It has a two-layer pipe structure consisting of a joint outer pipe 16 that surrounds the joint inner pipe 15 and forms a ventilation path between the outer circumferential surface of the joint inner pipe 15 and its own inner surface,
The joint inner pipe 15 and the joint outer pipe 16 are connected to the drainage standpipe 1 with respect to the pipe cores of the upper and lower drainage standpipes 10 and 11.
0 and 11, and the joint outer pipe 16
The inner joint tube 15 has a substantially hopper-shaped shape in which the lower openings are gradually tapered and smaller in diameter than the upper openings, and the diameter of the upper opening of the outer joint tube 16 is as follows: Upstream side drainage standpipe 1
The outer diameter of the outer pipe 16 is larger than the outer diameter of the outer pipe 13 of the joint outer pipe 16.
At least a portion of the upper end opening that extends outward beyond the outer diameter of the upstream standpipe 10 is closed by an annular upper end closing member, and this upper end closing member connects the inside of the joint outer pipe 16 and the upstream side. The inside of the drainage standpipe 10 is sealed from the outside, and the diameter of the upper end opening of the joint inner pipe 15 is larger than the outer diameter of the inner pipe 12 of the upstream drainage standpipe 10, and the upper end opening of the joint inner pipe 15 is The section is located below the upper end opening of the joint outer pipe 16 in order to communicate the ventilation path B in the upstream drainage standpipe 10 with the ventilation path in the intermediate drainage joint 14 for two-layer pipes, and thereby, The drainage path in the joint inner pipe 15 communicates with both the drainage path A and the ventilation path B of the upstream drainage standpipe 10, and the lower end of the joint outer pipe 16 communicates with the outer pipe 13a of the downstream drainage standpipe 11. , and the lower ends of the joint inner pipes 15 are respectively joined to the upper ends of the inner pipes 12a of the downstream side drainage standpipe 11, so that the drainage path and the ventilation path in the intermediate drainage joint 14 for double-layer pipes are connected to the downstream side drainage standpipe 11. It is connected to the drainage path A and the ventilation path B of the side drainage standpipe 11, and at a portion of the inner wall of the joint inner pipe 15 near the upper end, it passes through the joint outer pipe 16 and is connected to the external drainage horizontal branch pipe 21. The tip of at least one branch pipe 20 to be connected is opened through, and the pipe core of this branch pipe 20 is connected to the branch pipe 2.
The structure is such that the waste water flowing into the joint inner pipe 15 from 0 flows downward while swirling along the inner surface of the joint inner pipe 15, extending to an eccentric position from the pipe core of the joint inner pipe 15. Intermediate drainage joint 1 for double-layer pipes
4, the lower part of the inner pipe 12 of the upstream drainage standpipe 10 enters the joint inner pipe 15, and as a result, the lower end opening of the inner pipe 12 of the upstream drainage standpipe 10 is inserted into the joint inner pipe 15. The upper end opening of the joint inner tube 15 is located below the upper end opening and is closed by an annular upper end closing member having a slit-shaped ventilation relay port 22. The lower part of the inner pipe 12 of the upstream drainage standpipe 10 is provided with an upstream joint opening 17 through which the inner pipe 12 of the upstream drainage standpipe 10 is fitted, and each of the joint inner pipe 15 and the joint outer pipe 16 The upper end closing member is provided with inspection openings 24 and 23, respectively, for carrying out internal inspection and a full water test of the route of the drainage horizontal branch pipe 21.
is an intermediate drainage joint for a two-layer pipe, characterized in that it can be opened and closed at the same time by a common inspection lid 25. 2 The inspection lid 25 is an outer lid with a gasket that has a diameter larger than the diameter of the inspection opening 23 on the joint outer pipe 16 side, has a hooking recess 26 on the back side, and opens and closes the inspection opening 23. 27, and an inner lid with a packing that has a larger diameter than the opening 24 for inspection on the side of the inner pipe 15 of the joint, has an integral rising rod 28, and closes the opening 24 for inspection on the inner pipe 15 of the joint. 2
It has a double lid configuration consisting of 9 and 2 rising rods.
A locking piece 30 is provided at the upper end of the locking recess 26, and a handle 31 is provided on the front side of the outer cover 27.
By pushing and turning the outer cover 27 and inner cover 29, the inspection openings 23 and 24 are made airtight, and the outer cover 27 and inner cover 29 can be attached and detached as one unit. Characteristic claim 1
Intermediate drainage joint for double-layer pipes as described in section. 3. A branch joint 37 is attached to the external end of the branch pipe 20, and this branch joint 37 has a closing wall, and each of the drainage horizontal branch pipes 21 of various diameters is attached to this closing wall. Multiple circular cutting grooves 3 for different pipe diameters
4 to 36 are provided, and in this branch joint 37, a circular groove with a diameter corresponding to the pipe diameter of the drainage horizontal branch pipe 21 to be connected is cut out and a hole is opened, and a gasket is inserted into the opening. The intermediate drainage joint for a two-layer pipe according to claim 1 or 2, characterized in that the corresponding drainage horizontal branch pipe 21 is fitted therein. 4. The circular kerf grooves 34 to 36 according to pipe diameter are formed in the shape of an eccentric circle in which a portion of the circumference of each of the circular kerf grooves 34 to 36 collectively coincides with each other. Intermediate drainage joint for double-layer pipes as described in section.