JPH1136400A - Pipe joint and drain pipeline using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint having excellent flexibility and impact resistance and being easily joined with a drainage basin and a piping and a drain pipeline. SOLUTION: In the pipe joint J, a socket 2, in which a diameter is expanded, is formed at one end of a joint body 1, a rubber ring 3 hermetically sealing a section between an inserting pipe A inserted into the socket 2 and the socket 2 is installed near the opening section of the inner circumferential surface of the socket 2, and the inserting pipe A is connected slidably in the pipe shaft direction. The pipe joint J consists of the blended body of a 90-40 wt.% polyvinyl chloride resin and a 10-60 wt.% elastomer or a material, in which 90-40 wt.% vinyl chloride is graft-polymerized with the 10-60 wt.% elastomer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint and a drainage pipe used for wastewater treatment.

[0002]

2. Description of the Related Art A hard vinyl chloride resin is widely used as a piping material in a drainage basin, and a hard vinyl chloride resin is also used in a pipe joint thereof. However, conventional rigid polyvinyl chloride pipe joints have high rigidity and cannot follow vertical and horizontal vibrations caused by seismic waves, and thus have a problem that breakage or detachment occurs.

As a pipe joint having excellent flexibility and impact resistance, a polyethylene pipe joint (JP-A-58-131025) is known.
JP-A-55-500185 and JP-A-55-500185
-500479) is known.

[0004]

A polyethylene pipe joint is superior to a rigid polyvinyl chloride pipe joint in terms of flexibility and impact resistance. However, the method of connecting the pipe to the pipe is an electrofusion method or a butt fusion method. The method must be adopted, and there are problems in terms of workability, piping cost, and the like.

[0005] In order to solve the problem of the above-mentioned hard vinyl chloride resin pipe joint, a structure in which a rubber ring is provided on the pipe joint has been considered. However, the pipe joint made of hard vinyl chloride resin provided with this rubber ring can cope with minute displacement due to seismic waves, but it can be used for large displacement, especially displacement that pushes in the axial direction. There was a case where a pipe inserted into the inside hit and was damaged due to concentrated stress.

[0006] The present invention has been made in view of the problems of such conventional pipe joints, and is excellent in flexibility and impact resistance, and can be easily connected to drainage pipes and piping. And to provide drainage pipes.

[0007]

According to the first aspect of the present invention, an enlarged diameter socket is formed at one end of a joint body.
In the vicinity of the opening on the inner peripheral surface of the receptacle, a rubber ring for sealing between the insertion pipe inserted into the receptacle and the receptacle is provided, and the insertion pipe is slidably connected in the pipe axis direction. A pipe joint comprising a polyvinyl chloride resin 90 to 40.
It is composed of a blend of 10% to 60% by weight of an elastomer or 10 to 60% by weight of an elastomer and 90 to 40% by weight of vinyl chloride.

According to a second aspect of the present invention, a drainage plume made of a vinyl chloride resin is connected to the other end of the receptacle of the pipe joint according to the first aspect, and the drainage plenum is included in the piping. It is a drainage pipe characterized by the following.

In the present invention, the elastomer is an ethylene-vinyl acetate copolymer (hereinafter referred to as EVA),
Ethylene = (meth) acrylate copolymer (hereinafter referred to as EA), acrylonitrile = butadiene copolymer (hereinafter referred to as NBR), chlorinated polyethylene (hereinafter referred to as CPE), (meth) acrylate copolymer Coalescence (hereinafter referred to as AC), methyl methacrylate =
Styrene-butadiene copolymer (hereinafter referred to as MBS), chlorosulfonated polyethylene (hereinafter referred to as CSPE)
) Or polyurethane (hereinafter, referred to as PU).

[0010] The elastomer referred to in the present invention is a generic term for a polymer material having flexibility at room temperature, and is not particularly limited. In the case of EVA, for example, the vinyl acetate content is 10 to 80% by weight. , Melt flow rate (hereinafter referred to as MFR) measured according to "JIS K6760"
Those having a value of 0.5 to 300 can be used.

In EA, for example, the type of acrylate is ethyl acrylate, butyl acrylate,
Ethylhexyl acrylate or the like, the type of acrylate is 10 to 80% by weight, and the MFR value is 0.1 to 100%.
Can be used.

In the MBR, for example, when the acrylonitrile content is 20 to 50% by weight and the Mooney viscosity (ML1 + 4
: 100 ° C) of 10 to 200. As the CPE, for example, those having a chlorine content of 20 to 55% by weight and an MFR value of 0.1 to 100 can be used.

In AC, for example, acrylates such as ethyl acrylate, n-propyl acrylate, butyl acrylate, hexyl acrylate and 2-ethylhexyl acrylate having a glass transition temperature (hereinafter referred to as Tg) of a homopolymer of -20 ° C. or less are used. A polymer having a high Tg such as methyl methacrylate may be formed into a multi-stage structure by copolymerization or multi-stage polymerization. At this time, the polymer may have a crosslinked structure using a monomer having two or more functionalities. The average particle size is not particularly limited, but is generally 0.01 to 5 μm.

In the MBS, for example, when the butadiene component is 5
0 to 90% by weight, methyl methacrylate component is 5 to 45%
% By weight and the styrene component can be 5 to 45% by weight, and there is no particular limitation on the average particle size.
It is 1 to 5 μm. In CSPE, for example, the chlorine content is 20 to 50% by weight, and the sulfur content is 0.5 to 50%.
Mooney viscosity (ML1 + 4: 100 ° C) at 2.0% by weight
Are 10 to 200.

In PU, for example, a polyfunctional active hydrogen compound such as a polyol is reacted with an isocyanate compound in the entire reaction system to obtain a linear polymer or a partially crosslinked structure. Generally, a caprolactone type, Adipate type,
Ether type and the like.

In the present invention, these elastomers are blended with a polyvinyl chloride resin, or a material obtained by grafting vinyl chloride to these resins is used to form an injection-molded or extruded tube by heating. The pipe joint is manufactured by the following processing method.

As the polyvinyl chloride resin for blending, a homopolymer of vinyl chloride or a copolymer of a monomer copolymerizable with vinyl chloride can be used. Examples of monomers copolymerizable with vinyl chloride include α-olefins such as ethylene and propylene, vinyl esters such as vinyl acetate and vinyl propionate, and vinyl ethers such as isopropyl vinyl ether and cetyl vinyl ether.
Styrene derivatives such as styrene and α-methylstyrene, (meth) such as n-butyl acrylate, 2-ethylhexyl acrylate or methyl methacrylate
Examples include acrylic esters, vinyl cyanides such as acrylonitrile and methacrylonitrile, N-substituted maleimides such as cyclohexylmaleimide and phenylmaleimide, and maleic acid derivatives and fumaric acid derivatives. These can be used alone or in combination of two or more. The content of these in polyvinyl chloride is appropriately selected in the range of 10 to 60% by weight depending on the purpose, but is preferably in the range of 12 to 20% by weight. If the content is 20% by weight or more, the inherent properties of the polyvinyl chloride resin are lost.

(Function) The drainage pipe joint according to the first aspect of the present invention is made of a material which is rich in flexibility and impact resistance, can sufficiently withstand vertical and horizontal vibrations caused by seismic waves, and breaks. Not even. Further, at one end of the joint main body, an enlarged-diameter receiving port is formed, and a rubber ring is provided near the opening on the inner peripheral surface of the receiving port to seal between the insertion tube inserted into the receiving port and the receiving port. Since the insertion pipe is slidably connected in the pipe axis direction, the pipe inserted inside the pipe joint hits even a large displacement, particularly a displacement such as pushing in the axial direction, and a concentrated stress. It will not be damaged by receiving it. Further, since the rubber ring is provided in the socket of the joint main body, the joint with the insertion tube is easy.

According to a second aspect of the present invention, a drainage pipe made of a vinyl chloride resin is connected to the other end of the socket of the pipe joint according to the first aspect. Since it is included in the middle, it can sufficiently withstand vertical and horizontal vibrations caused by seismic waves and does not break.

[0020]

Embodiments of the present invention will be described below. 1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view of a pipe joint, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. It is explanatory drawing which shows the drainage pipe which was put.

In the figure, J is a drainage pipe joint, which is made of a material obtained by graft copolymerizing 84% by weight of vinyl chloride with 16% by weight of rubber of n-butyl acrylate. The pipe joint J is used by being connected between a drainage basin C formed of a vinyl chloride resin and a pipe A on the inflow side of the drainage basin C.

In the pipe joint J, an enlarged diameter receiving port 2 is formed at one end of the coupling main body 1, and an insertion pipe A inserted into the receiving port 2 is provided near an opening of an inner peripheral surface of the receiving port 2. A rubber ring 3 for sealing the space between the receiving port 2 is provided, and the insertion pipe A is slidably connected in the pipe axis direction. Reference numeral 4 denotes a concave groove into which the rubber ring 3 is inserted. The other end of the pipe joint J is provided with an insertion port 11 for connection to the drainage basin C.

In the above-mentioned pipe joint J, as shown in FIG. 2, the axis X of the joint body 1 is set so that the axis X of the socket 2 is flush with the pipe bottom of the socket 2 and the pipe bottom of the joint body 1. It is located closer to the top of the pipe than Y. In the pipe joint J, the axial length L from the rubber ring 3 to the boundary between the joint body 1 and the receiving port 2 is about 250 mm larger than the diameter d of the joint body 1.

The drainage basin C is a 90-degree merged drainage basin. The inlet side receiving port C2 having a diameter corresponding to the bonding port 11 of the pipe joint J is provided on the side wall of the main body C1 having a bottomed cylindrical body. Is provided, and a sewer pipe D is attached at a position orthogonal to the inflow-side receiving port C2. Note that C3
Is a lid.

The pipe A is a vinyl chloride resin pipe, which penetrates the foundation B of the building and feeds sewage generated in the building. The diameter of the pipe A is made equal to the diameter of the receiving port 2 of the pipe joint J.

Next, a drainage pipe using the pipe joint J of the present embodiment will be described with reference to FIG. The drainage pipe is connected to a drainage pipe C made of a vinyl chloride resin at the other end of the socket 2 of the pipe joint J.
Is included in the middle of the pipe, and is constructed by the following method. The drain mast C is buried in the excavated soil and connected to the sewer D. The bonding inlet 11 of the pipe joint J coated with the adhesive is inserted into the inflow-side receiving port C2 of the drainage trough C, and is bonded and fixed. Then, the pipe A is inserted and attached to the receptacle 2 of the pipe joint J, and the pipe A penetrates a building foundation B such as mortar, cement or the like and is piped inside the building.

Conventionally, in such a drainage pipe, the vibration caused by the seismic wave causes a time lag between the building and the ground, resulting in more complicated vibration, and breakage or disconnection accident has occurred at the pipe joint J. However, since the pipe joint J according to the present embodiment and the drainage pipe using the pipe joint J are made of a material having high flexibility and impact resistance, and can sufficiently withstand vertical and horizontal vibrations caused by seismic waves. , No damage. Further, at one end of the joint body 1, an enlarged diameter receiving port 2 is formed, and the insertion tube A inserted into the receiving port 2 is slidably connected in the axial direction of the pipe, so that a large displacement, particularly in the axial direction. The pipe A inserted inside the pipe joint J does not hit the pipe A when the pipe A is pushed into the pipe joint J. Further, since the rubber ring 3 is provided in the socket 2 of the joint body J, the joint with the insertion tube A is easy.

Further, in the pipe joint J of this embodiment, the joint center 1 of the joint body 1 is arranged such that the axis X of the socket 2 is flush with the pipe bottom of the socket 2 and the pipe bottom of the joint body 1. Is located closer to the pipe top than the axis Y, so that the dirt mixed with the wastewater flowing from the pipe A does not get caught.

[0029]

According to the first aspect of the present invention, it is possible to obtain a pipe joint which is excellent in flexibility and impact resistance, and can be easily connected to a drainage pipe or a pipe. In addition, even for a large displacement such as pushing in the axial direction, the pipe inserted into the pipe joint does not hit and is not damaged by the concentrated stress, so it is safe.

The drainage pipe according to the second aspect of the present invention is provided with a pipe joint which is excellent in flexibility and impact resistance and does not break even with a large axial displacement. It can sufficiently withstand vertical and horizontal vibrations caused by seismic waves and does not break.

[Brief description of the drawings]

FIG. 1 is a plan view of a pipe joint according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory view showing a drainage pipe using the pipe joint of FIG. 1;

[Explanation of symbols]

 J Fittings 1 Fitting body 11 Inlet 2 Receptacle 3 Rubber ring A Piping B Building foundation C Drain X

Claims (2)

[Claims] 1. A joint having an enlarged diameter formed at one end of a joint body, and a rubber for sealing between an insertion tube inserted into the receptacle and the receptacle near an opening of an inner peripheral surface of the receptacle. A pipe joint provided with a ring, wherein the insertion pipe is slidably connected in a pipe axis direction, wherein a blend of 90 to 40% by weight of a polyvinyl chloride resin and 10 to 60% by weight of an elastomer, or an elastomer A pipe joint comprising a material obtained by graft copolymerizing vinyl chloride with 90 to 40% by weight to 10 to 60% by weight. 2. A drainage pipe characterized in that a drainage pipe made of a vinyl chloride resin is connected to the other end of the socket of the pipe joint according to claim 1, and the drainage pipe is included in the middle of the pipe. .