Double-hole drainage pipe

Abstract

The invention discloses a double-hole drainage pipe which is applied to an indoor drainage pipeline of a building and can be used for completing drainage and ventilation by a riser. The double-hole drainage pipe mainly comprises a straight pipe, a connector and a pipe fitting, wherein the straight pipe consists of an inner pipe 1 and an outer pipe 2, the inner pipe 1 is supported and fixed in the outer pipe 2 by a side wing 4 and a positioning tenon 5, concentric circles are formed by the inner pipe 1 and the outer pipe 2, a drainage hole is formed in the inner pipe, a vent hole 6 is formed in an annular channel between the inner pipe 1 and the outer pipe 2, the drainage riser is formed by one pipe, achieves a drainage effect of double risers but occupies less space compared with the double risers and is convenient to clean and maintain, and vents for connecting drainage with ventilation are uniformly distributed in the riser, so that the venting effect is good, the possibility of air blocking is low, and the drainage flow is large. The riser passes through a floor slab, and is convenient to connect and install compared with the double risers, so that the construction process is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to a double-hole drainage pipe, which relates to water supply and drainage engineering, in particular to a building indoor drainage pipe. Background technique [0002] The indoor drainage pipe system of the building is composed of drainage vertical pipes and horizontal drainage pipes. The drainage outlets of sanitary appliances are provided with traps connected to the horizontal drainage pipes through branch pipes, and then discharged into the vertical pipes from the horizontal pipes, and finally discharged to the outdoor inspection well. When a relatively large flow of waste water entrains solid waste through the horizontal pipe or vertical pipe, it acts like a piston. The front end forms an air block, which affects the drainage flow, and the rear end easily forms negative pressure to empty the water in the trap. Cause the peculiar smell in the pipeline to escape to the room. [0003] There are two types of indoor drainage syste...

AI Technical Summary

Problems solved by technology

A certain distance should be left between the two standpipes to facilitate installation, and it takes up a lot of indoor space. When the two standpipes pass through the floor, they need to be installed with wall bushings and install two pipes respectively. The construction process is cumbersome and will require future maintenance. difficulty

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