Water-blocking device used for pipe

Abstract

The invention discloses a sealing device used in pipelines, which comprises an O-shaped sealing ring (4), a circular ring-shaped compression nut (2), and a circular ring-shaped base (3); the base (3), the O-shaped sealing ring (4) and the compression nut (2) are sheathed on a pipeline (1) in sequence; the sealing device is characterized in that the O-shaped sealing ring (4) is arranged on a ring-shaped convex ring (33) of a base internal cavity (35); the base (3) passes through the internal thread (34) above the ring-shaped convex ring (33) and is then connected with the external thread (22) of the compression nut (2) by the thread; the internal periphery wall of the O-shaped sealing ring (4) clings to the external periphery wall of the pipeline (1); and the lower end part of the compression nut (2) leans against the O-shaped sealing ring (4) tightly. The sealing device has the advantages that the O-shaped sealing ring is extruded by tightly screwing the compression nut and expanded towards the periphery by the enough extrusion force which is caused by the fastening of the thread, thus enabling the periphery of the O-shaped sealing ring to cling to the external periphery wall of the pipeline and the sealing ring bottom in the base tightly so as to obtain good sealing (namely leakage stopping) effect; in addition, the O-shaped sealing ring has small volume, and can be only made of rubber; the manufacturing is simple and the cost is low.

Description

technical field [0001] The invention relates to a water stop device for pipelines passing through concrete floors. Background technique [0002] Since plastic pipes are widely used in building drainage pipes, water leakage at the interface between the outer wall of the drainage pipe and the concrete floor is a major problem in construction, especially in squatting pans, toilets, floor drains, etc., due to the heat expansion and cooling of the pipe itself The shrinkage is inconsistent with the concrete, and there is a gap between the outer wall of the pipe and the concrete interface, resulting in leakage here. It is very troublesome to repair these parts when they are put into use, and leakage in these parts is quite common, which has become a common problem. [0003] A Chinese utility model patent with the patent number 200720200186.0 and titled "Building Water Supply and Drainage Conduit Passing Buildings" proposes a structure, which includes: the bottom formwork of the co...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the sealing water-stop ring presses the sealing water-stop ring through the inner wall plane of the water-stop ring end cover, so as to promote the tight fit between the sealing water-stop ring and the pipeline. In fact, the strength of this cooperation is not enough. It is difficult to achieve a good water-stop effect; in addition, the sealing water-stop ring has a large volume, and there is a concave cavity in the middle, which not only requires a lot of raw materials, but also is very troublesome to manufacture, so its structure still needs to be improved

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