JPH05302693A - Pipe joint - Google Patents

Abstract

PURPOSE:To reduce a muck dropping noise by forming a joint inner wall surface layer, in a part on which a connection port inside cross sectional shape is projected when parallel light is radiated to the central axis of the pipe connecting port, of an elastic material having specific hardness and thickness in a pipe joint having a bend pipe part. CONSTITUTION:A joint body 2 is formed of cast iron, and has a bend pipe part 23 between a vertical pipe connecting port 21 and a horizontal pipe connecting port 22, and the wall surface of the bend pipe part 23 on which an inside cross sectional shape of the vertical pipe connecting port 21 is projected when parallel light is radiated to the central axis of the connecting port 21, is swollen outside of a pipe, and a recessed part 24 is formed inside of it. An elastic material layer 3, whose surface layer has Shore D hardness equal to or lower than 50 degree and thickness equal to or thicker than 5 millimeter, is formed in this part. Since a part of muck dropping energy is absorbed by the elastic material layer 3, vibration is reduced in a joint part, so that a generating noise can be also reduced. It is preferable to set the elastic material layer 3 surface and the other part surface on the same plane. Natural rubber, synthetic rubber, a synthetic resin elastomer material or their foaming body can be listed as a construction material for an elastic materal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for connecting a vertical pipe laid vertically and a horizontal pipe laid horizontally.

[0002]

2. Description of the Related Art Conventionally, in a multi-story apartment house, as shown in FIG.
2, a vertical pipe 102 and a horizontal pipe 103 extending horizontally and connected to a sewage pit or a sewer main are shown in FIG. 6 as a pipe joint (generally called an elbow).
A drainage pipe 301 is formed by connecting through 201, and sewage and sewage discharged from a toilet bowl or the like of each house is made to flow to a sewage pit or a sewer main.

This pipe joint 201 has a vertical pipe connection port 202.
And a horizontal pipe connection port 203 are provided with a curved pipe portion 204 whose axis bends in an arc shape by 90 degrees, so that drainage flowing down the vertical pipe can be smoothly poured into the horizontal pipe, and generally a casting is used. And a rigid material such as synthetic resin such as hard vinyl chloride.

[0004]

However, the conventional pipe joint 201 has the following problems. That is, as shown in FIG. 5, when the wastewater accompanied with the waste 104 is drained to the drainage pipe 301 using the pipe joint 201, the waste 104 that has fallen in the vertical pipe 102 together with the wastewater is bent from the pipe joint 201. Colliding with the inner wall surface of the pipe portion 204, the pipe joint 201
Vibrates.

This vibration 401 vibrates the first-floor slab 101 through a supporting metal or the like and causes noise 402 in the living room on the first floor. In particular, in an apartment house on the third floor or higher, the sewage 104 discharged together with the sewage from the toilet on the higher floor
Freely falls in the vertical pipe 102 faster than the wastewater drained together. Therefore, only the dirt 104 is
Colliding with the inner wall surface of the curved pipe portion 204 of the pipe joint 201,
Since noise peaking at a low frequency of about 250 HZ is generated, there is a problem of low frequency noise in the first-floor residence around the pipe joint 201.

In view of the above circumstances, the present invention has an object to provide a pipe joint capable of reducing the noise caused by falling of filth.

[0007]

In order to achieve such an object, a pipe joint according to the present invention is arranged horizontally with a connection port of a vertical pipe laid vertically on both sides of a curved pipe portion. In a pipe joint provided with a curved pipe portion between the connection port of the horizontal pipe to be laid, at least when light parallel to the central axis of the connection port of the vertical pipe is applied, the inner cross-sectional shape of the connection port of the vertical pipe is The inner wall of the joint of the projected portion has a surface layer with a Shore D hardness of 50.
The elastic member has a hardness of 5 degrees or less and a thickness of 5 mm or more.

In the above structure, the surface of the elastic material layer is not particularly limited, but it is preferable that it is flush with the surface of the portion where the elastic material layer is not provided. The material of the elastic material is not particularly limited, but natural rubber, synthetic rubber,
Synthetic resin elastomer materials and these foams can be mentioned. Especially, the surface of the elastic material is warm drainage flowing through the drain pipe,
Since it is in direct contact with dirt, foreign matter, various detergents, etc., it is preferable to use one that has excellent heat resistance at about 60 ° C, chemical resistance to detergents, etc., and abrasion resistance.
Fluorine type and CR (chloroprene) type are preferable.

The outermost surface layer may have a two-layer structure in which thin plate materials having excellent abrasion resistance are laminated. The material of the portion other than the elastic material is not particularly limited, but is preferably a conventionally used metal such as cast iron, a synthetic resin such as vinyl chloride resin, an inorganic material such as concrete, or a composite material thereof.

[0010]

According to the above construction, the filth that has flowed down the vertical pipe together with the sewage collides with the portion where the inner cross-sectional shape of the connection port of the vertical pipe is projected when the light parallel to the axial direction of the vertical pipe is applied. To do. However, in this part, the surface layer has a Shore D hardness of 50.
Since it is made of an elastic material having a hardness of 5 degrees or less and a thickness of 5 mm or more, a part of the falling energy of filth is absorbed by the elastic material layer on this surface, and the vibration of the pipe joint portion becomes relatively small. Noise generated in the nearby living room is also reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. 1 and 2 show an embodiment of a pipe joint according to the present invention. As shown in the figure, the pipe joint 1 includes a joint body 2 and an elastic material layer 3
It consists of and.

The joint body 2 is made of cast iron and has a vertical pipe connection port 21.
The curved pipe portion 23 is provided between the horizontal pipe connection port 22 and the horizontal pipe connection port 22, and the connection port 2
When a ray parallel to the central axis of 1 is applied, the vertical pipe connection port 1
The wall surface of the curved tube portion 23 on which the inner cross-sectional shape of No. 1 is projected bulges outward from the tube, and a recess 24 having a thickness of 10 mm is formed inside. The elastic material layer 3 has a Shore D hardness of 30 degrees and a thickness of 10
It is formed by embedding millimeter chloroprene rubber material in the recess 24, and the surface of the elastic material layer 3 is flush with the surface of the other portion where the elastic material layer 3 is not provided.

This pipe joint 1 and 100A as a vertical pipe
Assemble a 7-story experimental drainage pipe by connecting a PVC lining steel pipe and a 125A PVC lining steel pipe as a horizontal pipe, and from the 7th floor, a concrete waste with a specific gravity of about 0.95 and a spherical oil viscosity of 100g Put into this drainage pipe,
The noise level generated on the first floor and the vibration acceleration level of the joint were measured 10 times repeatedly, and the noise level of the noise level was measured together with the measurement result when the conventional pipe joint 201 made of cast iron as shown in FIG. 5 was used. The measurement results are shown in Table 1, and the vibration acceleration level measurement results are shown in Table 2.

[0014]

[Table 1]

[0015]

[Table 2] As shown in Table 1 and Table 2 above, the pipe joint 1 of this embodiment
When used, the noise level and the vibration acceleration level are reduced as compared with the case where the conventional pipe joint 201 is used.

Therefore, the problem of noise in the first-floor residence near the pipe joint can be solved. Further, the pipe joint 1 of this embodiment
Since the surface of the elastic material layer 3 and the surface of the portion where the elastic material layer 3 is not provided are flush with each other, the elastic material layer 3 does not get caught on the elastic material layer 3 and smoothly flows from the lateral pipe together with the dirty water. Is discharged. Incidentally, the pipe joint according to the present invention,
It is not limited to the above embodiment. For example, in the above-described embodiment, the recess 24 is formed inside the curved pipe portion 23 by bulging the wall surface of the joint body 2 to the outside, but as shown in FIG. 25, and the elastic material layer 3 may be provided by embedding an elastic material in the recess 25. Further, as shown in FIG. 4, the surface of the elastic material layer 3 is protected by a thin film layer 6 of hard vinyl chloride or the like for protection.
May be provided.

[0017]

Since the pipe joint according to the present invention is constructed as described above, a part of the falling energy of the filth that has fallen in the vertical pipe together with the sewage and collided with the inner wall surface of the curved pipe portion is It is absorbed by the elastic material layer. Therefore, the vibration of the pipe joint is relatively small, the noise generated in the living room near the pipe joint is small, and the person living in the house directly above the pipe joint or in the vicinity does not suffer from noise.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of a pipe joint according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of a second embodiment of the pipe joint according to the present invention.

FIG. 4 is a cross-sectional view of an elastic material layer portion of a pipe joint according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a mechanism of noise generation at a pipe joint portion of a drainage pipeline.

FIG. 6 is a cross-sectional view of a conventional pipe joint.

[Explanation of symbols]

 1 Pipe Joint 3 Elastic Material Layer 21 Vertical Pipe Connection Port 22 Horizontal Pipe Connection Port 23 Curved Pipe Part

Claims (1)

[Claims] 1. A pipe joint provided with a curved pipe portion between a connection port of a vertical pipe laid vertically on both sides of a curved pipe portion and a connection port of a horizontal pipe laid horizontally, at least. When light parallel to the central axis of the connection port of the vertical pipe is applied, the inner wall of the joint of the portion where the inner cross-sectional shape of the connection port of the vertical pipe is projected has a surface layer with a hardness of Shore D hardness of 50 degrees or less. A pipe joint formed of an elastic material of 5 mm or more.