JPH0312846Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wastewater collecting pipe used as a wastewater treatment pipe in high-rise buildings, etc.

(Prior Art) Conventionally, a drainage collecting pipe 1' as shown in FIGS. 3 and 4 has been used. The upper and lower openings 2' and 5' of the collecting pipe 1' are connected to the upper and lower main pipes 3' and 6' that are piped in the vertical direction.
In the large diameter portion 7' between the pipes 5', lateral openings 9' are provided for connection with branch pipes 8' arranged laterally. Here, the branch pipes 8' are connected to a toilet bowl, a kitchen sink, etc. via a well-known drain trap. A meniscus-shaped guide plate 12' is attached near the upper part of the inner surface of the large diameter portion 7' so as to be inclined downward toward the center of the tube. Furthermore, near the lower part of the inner surface of the large-diameter portion 7', blades 11' are attached to swirl the falling water around the vertical axis.

As a result, the drainage water flowing down from the upper main pipe 3' is directed to the guide plate 1 as shown by the arrow in Fig. 3.
2', the flow direction changes toward the inner surface of the large diameter portion 7', and the waste water flows along the inner surface.

It is said that by causing the wastewater to flow along the inner surface of the large diameter portion 7' in this manner, the flow velocity is reduced and the increase in pressure inside the pipe due to the impact when the wastewater falls is also reduced. Further, since the waste water is caused to flow downward while rotating around the vertical axis by the wing pieces 11', a sealing phenomenon in which water becomes clogged does not occur even in a portion where the pipe diameter gradually decreases. The turning performance of the water discharged by the blades 11' is improved by the water flowing down along the peripheral wall 7'.

(Problem to be solved by the invention) However, in the above-mentioned conventional technology, the drainage flowing down from the upper main pipe 3' changes its flow direction by colliding with the guide plate 12'. Such impacts can cause drainage noise, and if the amount of drainage from above is large and the collision is severe, vibrations will occur in the collecting pipe 1' via the guide plate 12', especially in the upper main pipe 3'. This will adversely affect the sealing performance between the pipe and the collecting pipe 1'. Also,
Providing a protrusion such as the guide plate 12' inside the collecting pipe 1' is not easy in terms of product processing and increases the manufacturing cost.

The object of the present invention is to provide a drainage collecting pipe that can solve the above problems.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above object are as follows: The upper and lower openings 2 and 5 for connecting the upper and lower main pipes 3 and 6 in the vertical direction and the connection of the branch pipes 8 in the horizontal direction. A drain collection pipe made of cast iron and having a horizontal opening 9 for drainage, and an inner pipe 12 extending in a hanging manner from the upper opening 2. It is made of a rubber tube separate from the pipe 1, and is inserted and fixed from above the upper opening 2, and the part that is installed inside the drainage collecting pipe 1 is curved in the pipe axis direction. Connection receiving portion 12a formed on the upper end side of the inner tube 12
The upper main pipe 3 is connected to the upper main pipe 3.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Fig. 1, 1 is a drain collecting pipe made of cast iron, which is made up of two upper and lower members 1a and 1b that are fitted together.
The diameter of the upper and lower ends gradually decreases. 2 is the upper member 1
The upper opening provided in a is the connection port for the cast iron upper main pipe 3 which is piped in the vertical direction, and is connected to the inner pipe 12 which will be described later.
A stepped portion 4 is formed in the middle to serve as a socket. Reference numeral 5 designates a lower opening provided in the lower member 1b, which serves as a connection port for a lower main pipe 6 made of cast iron that is piped in the vertical direction, and serves as an insertion port for the lower main pipe 6.

The upper member 1 is disposed in the large diameter portion 7 between the upper and lower openings 2 and 5.
In a, lateral openings 9, 9, 9 for connecting branch pipes are provided at three locations spaced apart by 90 degrees in the circumferential direction. From each side opening 9, 9, 9, a connection socket 10,
10, 10 are provided protrudingly, and branch pipes 8, 8, 8, which are laterally piped, are connected thereto. Lower member 1b
The large diameter portion 7 is also provided with a lateral opening 9 for connecting to the branch pipe 8 and a connection socket 10 connected thereto, below the central opening 8 of the upper member 1a. Here, each branch pipe 8 is connected to a toilet bowl, a sink, etc. via a well-known drainage trap.

Furthermore, blades 11 are attached to the inner surface of the inclined wall 7a, which has a gradually decreasing diameter at the lower end of the lower member 1b, to rotate the drainage water flowing down from above about the vertical axis.

Reference numeral 12 denotes an inner tube made of a rubber tube that is separate from the drainage collecting pipe 1, and has a stepped portion 14 formed halfway in the tube axis direction, and is inserted from above the upper opening 2 to be inserted above it. The stepped portion 4 of the opening 2 and the stepped portion 14 of the inner pipe 12 are engaged with each other, thereby being fixed to the collecting pipe 1.

The upper end side of this inner tube 12 has the stepped portion 14
A connection receiving portion 12a having a large diameter is formed through the connecting portion 12a, and the upper main pipe 3 is connected to this connection receiving portion 12a.

The portion of the inner tube 12 below the stepped portion 14, that is, the portion that is internalized within the collecting tube 1, is curved in the tube axis direction, as shown in FIG. The direction is toward the inner surface of the large diameter portion 7 facing the central one of the three lateral openings 9, 9, 9. Further, the vertical position of the opening at the lower end of the inner tube 12 is the horizontal opening 9, 9, 9 of the upper member 1b.
Below the opening top 9a of the horizontal opening 9,
It is said to be approximately in the center of 9,9.

According to this embodiment having the above configuration, the drainage water flowing down from the upper main pipe 3 is changed in flow direction by the inner pipe 12 as shown by the arrow in FIG. 1, and flows down along the inner surface of the large diameter part. It is rotated by the lower blades 11 and flows down the inner surface of the standpipe 6. At this time, since the inner pipe 12 is curved, even if the drainage water tries to flow in a direction other than the curved direction, the flow will be restricted by a part of the inner surface of the inner pipe 12, and the drainage all flow toward the inner surface of the large diameter section 7 without the lateral openings 9, 9, 9. That is, a part of the inner pipe 12 serves as a flow regulating part 13 that prevents drainage water from flowing in the direction of the lateral openings 9. This can prevent drainage from entering the branch pipes 8. Furthermore, according to this embodiment, since the inner tube 12 is made of a rubber tube and has a curved shape, it is possible to change the direction of drainage more smoothly than in the past.
The impact received from drainage can be very effectively alleviated, and a remarkable noise prevention effect can be obtained.

Further, an inner tube 12 made of a rubber tube is inserted and fixed from the upper opening 2 separately from the collecting tube 1, and the upper main tube 3 is connected to a connection receiving portion 12a formed at the upper end side of the inner tube 12. As a result, the vibration of the pipe that causes reverberation inside the pipe is attenuated at the connection part, and further noise prevention effects are obtained, as well as improved sealing between the upper main pipe 3 and the collecting pipe 1, and easier machining. The manufacturing cost can also be reduced due to the simplification.

The inner tube 12 may also have a shape in which a portion of the inner surface of the large diameter portion 7 without the lateral openings 9, 9, 9 is removed.

(Effect of the invention) As explained above, according to the invention, the inner pipe 1
Since 2 is made of a rubber pipe and is curved in the pipe axis direction, it is possible to smoothly change the direction of the waste water while alleviating the impact of the waste water flowing down from the upper main pipe 3, which is extremely effective in preventing noise. can be achieved.

In addition, since the inner pipe 12 is inserted and fixed into the upper opening 2 as a separate body from the collecting pipe 1, and the upper main pipe 3 is connected to the connection receiving part 12a at the upper part of the inner pipe 12, the echo sound inside the pipe is reduced. The vibration of the pipe that causes the vibration is attenuated at the connecting part, and further noise prevention effect is achieved, and the sealing performance between the upper main pipe 3 and the collecting pipe 1 is also improved, and the collecting pipe is not used as before. There is no need to process protrusions within the structure, which can contribute to reducing manufacturing costs.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Figure 1 is a vertical cross-sectional view of the drainage collecting pipe, Figure 2 is the 1st
3 and 4 show a conventional example, FIG. 3 is a vertical sectional view of a drainage collecting pipe, and FIG. 4 is a sectional view taken along the line B-B in FIG. 3. It is a diagram. 1... Drainage collecting pipe, 2... Upper opening, 3...
Upper main pipe, 5... lower opening, 6... upper main pipe, 8...
Branch pipe, 9... Lateral opening, 12... Inner pipe, 12a...
...Connection socket.

Claims (1)

[Claims for Utility Model Registration] It is provided with upper and lower openings 2 and 5 for connecting the upper and lower main pipes 3 and 6 in the vertical direction, and a horizontal opening 9 for connecting the branch pipes 8 in the horizontal direction, and hanging from the upper opening 2. Inner pipe 1 extended to
The inner pipe 12 is made of a rubber tube separate from the drainage collecting pipe 1, and is inserted and fixed from above the upper opening 2. A connection receiving portion 12a formed on the upper end side of the inner pipe 12, which is curved in the pipe axis direction, is provided inside the drainage collecting pipe 1.
A drainage collecting pipe characterized in that the upper main pipe 3 is connected to the upper main pipe 3.