JPH08320094A - Collecting drain coupling - Google Patents

Abstract

PURPOSE: To provide a collecting drain coupling in which impulsive sound and drop sound are shut off and by which noise pollution can be prevented. CONSTITUTION: The upstream and downstream ends of an inner pipe 1 are connected to coupling parts 31a, 31b provided on the upper and lower parts of an inner coupling 3. The outer peripheral side of the inner coupling 3 is covered with an outer coupling 4, the upstream and downstream ends of an outer pipe 2 are connected to coupling parts 41a, 41b provided on the upper and lower parts of the outer coupling 4. The outer peripheral surfaces of the inner coupling 3 and the outer coupling 4 are covered with cushioning members 6. Therefore, impulsive sound or drop sound to be generated when drain is dropped in the inner pipe is shut off, and noise pollution can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner pipe having a drainage passage inside the pipe, and a two-layer pipe in which the outer peripheral side of the inner pipe is covered with an outer pipe to provide a ventilation passage between the inner pipe and the outer pipe. More specifically, the present invention relates to a collective drainage joint having sound insulation.

[0002]

2. Description of the Related Art In recent years, in high-rise housing such as apartments and condominiums, drainage equipment A such as toilets and bathtubs on each floor is gathered by a horizontal pipe B as shown in a partial vertical sectional view in FIG.
And the two-layer pipe D at the upper and lower joints of the collective drainage joint C.
A drainage system is used that connects the upstream and downstream ends of the.

The two-layer pipe D is a pipe in which the outer pipe 2 is covered on the outer peripheral side of the inner pipe 1 having a drainage passage, and a ventilation passage is provided between the inner pipe 1 and the outer pipe 2. The upper end of the ventilation path is open to the atmosphere. In addition, the collective drainage joint C is the inner joint C
Inner and outer joints C1 and C2 by covering the outer peripheral side of 1 with an outer joint C2
A ventilation passage is provided between the inner joint C1 and the inner joint C1 and the inside of the inner joint C1 is always maintained at atmospheric pressure through the ventilation passage. Therefore, the drainage flowing from the horizontal pipe B into the inner joint C1 swirls along the inner peripheral wall of the inner joint C1 and flows into the inner pipe 1 on the downstream side to smoothly drop.

[0004]

By the way, the drainage system of this two-layer pipe is superior in sound insulation as compared with the conventional one-layer drainage system because the pipe and the joint have a two-layer structure. However, noise pollution due to the impact sound of the drainage falling in the pipe and the falling sound sometimes occurred. In particular, the drainage that falls vertically from the upper floors inside the inner pipe and the drainage joint that joins the drainage flowing in from the horizontal pipe from the horizontal direction generate a lot of noise, which may interfere with sleep at night. .

The present invention has been made to solve the above problems, and provides a collective drainage joint which can prevent noise pollution by blocking impact noise and falling noise of drainage that falls in a pipe.

[0006]

SUMMARY OF THE INVENTION A collective drainage joint according to the present invention comprises an inner pipe having a drainage passage inside the pipe, and an outer pipe covering the outer peripheral side of the inner pipe and a ventilation passage between the inner pipe and the outer pipe. A two-layer pipe provided with, the joint portion in which the ends of the upstream and downstream inner pipes are connected by reducing the diameter of the upper and lower sides of a cylindrical main body having a diameter larger than that of the inner pipe. And an inner joint having a branch joint portion to which a horizontal pipe is connected from the tangential direction on the peripheral wall of the main body portion, and an outer shell body that covers the outer peripheral side of the inner joint and forms a ventilation path with a predetermined gap. It consists of an outer joint having a joint part to which the ends of the upstream and downstream outer pipes are connected by reducing the diameter of the top and bottom,
The outer peripheral surface of the inner joint or the outer joint is covered with a cushioning member.

[0007]

[Operation] Drainage falling vertically from the upper floors inside the inner pipe collides with the lower part of the inner joint to generate noise, and drainage flowing from the horizontal pipe collides against the peripheral wall of the inner joint to generate noise. However, since this noise is blocked or mitigated by the buffer member covering the outer peripheral surface of the inner joint or the outer joint, noise pollution does not occur.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a half sectional front view of a collective drainage joint showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and reference numeral 1 in the drawing is made of a synthetic resin such as vinyl chloride resin. Inner pipe,
Reference numeral 2 is an outer tube having fire resistance such as a steel tube and a cast iron tube. 3 is an inner joint, 4 is an outer joint, and these inner and outer joints 3,
4 is made of synthetic resin such as vinyl chloride resin. 5
Is asbestos on the outer peripheral surface of the synthetic resin pipe 51 such as vinyl chloride resin,
It is a horizontal drawing tube covered with a refractory member 52 such as mortar.

The inner pipe 1 serves as a drainage passage inside the pipe, and the outer peripheral side of the inner pipe 1 is concentrically covered with an outer pipe 2, and a space between the inner pipe 1 and the outer pipe 2 is provided. A ventilation path is formed. The upstream and downstream ends of the double-layer pipe D are connected via an inner joint 3 and an outer joint 4.

The inner joint 3 has a cylindrical main body 30 having a diameter larger than that of the inner pipe 1 and has a tapered portion 311 to reduce the diameter thereof to provide a receiving port 31a at the upper end thereof.
The diameter of the inner pipe 1 is reduced by 12, and a lower end portion thereof is provided with a spigot 31b so that the end portions of the upstream and downstream inner pipes 1 can be connected to the receptacle 31a and the spigot 31b. .

On the peripheral wall of the main body portion 30, there is provided a branch joint portion 32 to which the horizontal pulling pipe 5 is connected in the tangential direction. A cylinder 31 is provided in the main body 30 so as to hang down from the receiving port 31a, and the lower end of the cylinder 31 is set to be substantially equal in height to the upper part of the branch joint 32. . A vent hole a is provided in the tapered portion 311 so that the pressure inside the inner joint 3 is always maintained at atmospheric pressure via the vent hole a.

On the other hand, the outer joint 4 is provided with receiving ports 41a and 41b by reducing the upper and lower diameters of an outer shell 40 which covers the outer peripheral side of the inner joint 3 and forms a ventilation path with a predetermined gap. ,
The ends of the outer pipe 2 on the upstream side and the downstream side can be connected to the receiving ports 41a, 41b. Then, in this connection state, a ventilation path formed between the inner joint 3 and the outer joint 4,
A ventilation path formed between the inner pipe 1 and the outer pipe 2 is communicated with and opened to the atmosphere.

The outer peripheral surface of the outer joint 4 has a cushioning member 6
Is covered with a fireproof member 7 such as a steel plate on the outer peripheral side.
It consists of a structure covered with. Examples of the cushioning member 6 include synthetic rubber, putty having viscoelasticity, synthetic resin, asbestos, and the like, and a damping paint made of these members may be applied to the outer peripheral surface of the outer joint 4.

When a pipe for a two-layer pipe is constructed using this collective drainage joint, the socket 31a provided at the upper end of the inner joint 3 is used.
The end portion of the inner pipe 1 on the upstream side is fitted into and inserted into the inlet 31b at the lower end.
Is fitted and connected to a receiving port provided at the end of the inner pipe 1 on the downstream side. In addition, the receptacles 41a provided at the upper and lower ends of the outer joint 4,
The ends of the outer pipe 2 on the upstream side and the downstream side are connected to 41b, and the horizontal drawing pipe 5 is connected to the branch joint part 32 to complete the pipe construction.

In this double-layer pipe drainage system, the double-layer pipe D
Since the ventilation passage of No. 2 and the ventilation passage of the collective drainage joint communicate with each other, and the inside of the inner joint is open to the atmosphere, the drainage flowing from the horizontal pipe 5 swirls along the inner peripheral wall of the inner joint 3 and is downstream. It flows into the inner pipe 1 on the side and smoothly drops. In addition, since the outer peripheral surface of the outer joint 4 is covered with the cushioning member 6, the drain water that has fallen vertically from the upper floor in the inner pipe 1 collides with the lower portion of the inner joint 3 to generate noise, or to draw horizontally. Even if the drainage flowing from the pipe 5 collides with the peripheral wall of the inner joint 3 to generate noise, this noise is blocked by the buffer member 6 covering the outer peripheral surface of the outer joint 4,
Or, since it is mitigated, noise pollution will not occur.

Although the outer joint 4 is covered with the cushioning member 6 in the above embodiment, the present invention is not limited to this structure. In some cases, the outer peripheral surface of the inner joint 3 may be covered with the cushioning member 6, and if necessary, the outer peripheral surfaces of both the inner joint 3 and the outer joint 4 may be covered with the cushioning member 6.

[0017]

As described above in detail, in the collective drainage joint of the present invention, since the outer peripheral surface of the inner joint or the outer joint is covered with the cushioning member, the impact noise and the falling noise of the drainage are blocked or alleviated to cause the noise pollution. It is possible to prevent the occurrence of.

[Brief description of drawings]

FIG. 1 is a half sectional front view of a collective drainage joint showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the collective drainage joint shown in FIG.

FIG. 3 is a partial vertical cross-sectional view showing the outline of a two-layer pipe drainage system.

[Explanation of symbols]

 1 Inner pipe 2 Outer pipe 3 Inner joint 31a, 31b Joint part 32 Branch joint part 4 Outer joint 41a, 41b Joint part 5 Horizontal pulling pipe 6 Buffer member

Claims (1)

[Claims] 1. An inner pipe (1) having a drainage path in the pipe, and an outer pipe (2) covering an outer peripheral side of the inner pipe (1) between the inner pipe (1) and the outer pipe (2). A collective drainage joint to which a two-layer pipe (D) having a ventilation path is connected, the cylindrical main body (30) having a diameter larger than that of the inner pipe (1) is contracted to the upstream side. The joint portion (31a, to which the end portion of the inner pipe (1) on the downstream side is connected
31b), and a branch joint part (3) to which the horizontal pipe (5) is connected tangentially to the peripheral wall of the main body part (30).
The inner joint (3) provided with 2) and the outer shell (40) that covers the outer peripheral side of the inner joint (3) to form a ventilation path with a predetermined gap.
And an outer joint (4) provided with joint portions (41a, 41b) to which the ends of the upstream and downstream outer pipes (2) are connected by reducing the diameter of the upper and lower sides of the inner joint (3). Or outer joint (4)
A collective drainage joint characterized in that the outer peripheral surface of is covered with a cushioning member (6).