Pipe joints or couplings – Connector for conduit housing electromagnetic line: – Underground
Patent
1994-03-11
1995-05-16
Nicholson, Eric K.
Pipe joints or couplings
Connector for conduit housing electromagnetic line:
Underground
4211, 285153, F16L 4100
Patent
active
054154383
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a drainage vertical tube joint where swivel flow is formed in a waste water flowing down within a drainage vertical tube.
BACKGROUND ART
In the prior art, in a drainage vertical tube joint in a drainage ventilation piping structure of single tube type, in order to form swivel flow actively in a waste water flowing in, a reduction guide is installed at lower side of an upper vertical tube connection port, and one or plural swivel guides of spiral shape or blade shape are projected on an inner wall of a taper tube part extending from a swelling part to a lower vertical tube connection port.
Waste water flow subjected to speed reduction and course variation by the reduction guide flows down while supplied with swivel property by the swivel guide, and a ventilation core is formed at the center of the waste water flow flowing down and communication of air of a drainage piping system is intended and pressure variation within the drainage vertical tube is suppressed.
In such a drainage vertical tube joint of conventional construction, however, inner structure of the tube joint becomes quite complicated and there is a problem that clogging is produced due to foreign substance or the like. Also there is a problem that much labor is required for manufacturing the drainage vertical tube joint and the manufacturing cost runs up.
DISCLOSURE OF INVENTION
In view of the above-mentioned problems, an object of the present invention is to provide a drainage vertical tube joint where the tube joint is constituted concisely and ventilation core formation can be carried out accurately in a waste water flow flowing down.
In order to achieve the foregoing object, the present invention is in a drainage vertical tube joint comprising an upper vertical tube connection port connecting an upper drainage vertical tube, a swelling part provided at lower side of the upper vertical tube connection port and having inner diameter larger than that of the upper drainage vertical tube, a taper tube part formed in downward tapering state at lower side of the swelling part, a lower vertical tube connection port provided at lower side of the taper tube part and connecting a lower drainage vertical tube, and at least one lateral branch tube provided on the swelling part and opened in the horizontal direction, wherein the drainage vertical tube joint comprises an inner tube provided in hanging-down state at lower side of the upper vertical tube connection port, a reduction guide projected in downward incline state on an inner circumferential wall of the inner tube and having the projected end edge inclined downward in the length direction, and a swivel guide projected on an inner circumferential wall of the taper tube part and having the projected end edge inclined downward in the length direction, and the projected end edge of the reduction guide and the projected end edge of the swivel guide are opposed and formed in nearly parallel relation in projections of the horizontal plane and formed in intersection relation in projections of the vertical plane.
The present invention is constituted as above described, and a waste water flowing in from the upper drainage vertical tube collides with the reduction guide and is inhibited from flowing down just under it and subjected to speed reduction and guided in the inclination direction of the reduction guide and the course is varied. The waste water flow with its course varied collides with the inner circumferential wall of the taper tube part and subjected to the speed reduction and swiveled and flows down into the lower drainage vertical tube.
Also a waste water flowing in from the lateral branch tube connected to the lateral branch tube connection port has a part colliding with the inner tube and scattered and dropped onto the taper tube part. A residual waste water not colliding with the inner tube is dropped onto the swelling part and the taper tube part and scattered, and the residual waste water together with the above-mentioned scattered was
REFERENCES:
patent: 3346887 (1967-10-01), Sommer
patent: 3736955 (1973-06-01), Schlesser
patent: 4252348 (1981-02-01), Kojima
patent: 4998754 (1991-03-01), Matsumoto et al.
Kawamura Toshihiko
Kojima Noriatsu
Kojima Noriatsu
Nicholson Eric K.
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