Pipeline pressure test method and device

Abstract

The invention relates to a pipeline pressure test method and a device. The pipeline pressure test method comprises the steps of: arranging a sealing rubber ring the outer circle of which is provided with an annular groove at the welding location of a pipeline joint, using a tensioner ring jointed by sub-tensioner rings provided with embedded sub-ports to internally support the sealing rubber ring, using the variable diameter wedge to insert the jointed openings of the sub-tensioner rings and using bolts for locating; then using a double-direction impact hammer to beat the variable diameter wedge to tightly wedge and internally support the sealing rubber ring to lead the annular groove between the welding location of the pipeline joint and the middle of the outer surface of the sealing rubber ring to form a forced sealed space, opening an exhaust valve, achieving the specified pressure value by filling water and pressurizing, and then closing aninlet valve, thus being capable of inspecting the bearing pressure capability of the pipeline joint. The pressure test device mainly comprises a water injection pump, a pressure gauge, the sealing rubber ring, the tensioner ring and the variable diameter wedge; the outer circle of the sealing rubber ring is provided with the annular groove; the bottom end of the annular groove is provided with anexhaust pipe and the exhaust valve, which are communicated with the annular groove; and the tensioner ring is jointed by 3 to 6 sub-tensioner rings provided with embedded sub-ports.

Description

Technical field: [0001] The invention relates to the technical field of pipeline pressure testing, in particular to a pressure testing method and device for large pipelines. Background technique: [0002] At present, the method adopted in the domestic water supply and drainage pipeline construction acceptance pressure test is to fill the pipeline with clean water for pressure test. The usual method is to leave a long distance of original soil at the joint of each 1km pipeline as the back of the pressure test, install a steel partition at the two openings of the pipeline to block the nozzle, and then inject water into the pipeline for pressure test. Drain the water after pressing. The disadvantages are: a lot of water resources are wasted, construction needs to be stopped during pressure testing, and construction progress is affected. For example, the Chinese patent CN1558195 large-diameter pipeline construction intermediate pressure test technology and device, it is to use...

AI Technical Summary

Problems solved by technology

The disadvantages are: a lot of water resources are wasted, construction needs to be stopped during the pressure test, and the construction progress is affected

Disadvantages: (1) waste of water, (2) can only detect whether the overall pipeline is leaking, but cannot detect the leakage of the specific pipeline interface, (3) the pressure test device is complicated and bulky

This device is only suitable for large-scale cement socket pipes, and the production process of special-shaped rubber rings is complicated

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