Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest

Abstract

The invention discloses a large-caliber cast iron pipe pressure testing device without a backrest, and a large-caliber cast iron pipe pressure testing method without a backrest. The large-caliber cast iron pipe pressure testing device without a backrest includes a pressure testing short pipe and a pressure release apparatus, wherein the pressure testing short pipe includes a partition-type blind plate; two sides of the partition-type blind plate are symmetrically provided with standard short pipes; two ends of the pressure testing short pipe are connected with two adjacent pipes waiting for pressure testing; the pressure release apparatus sleeves the pressure testing short pipe; and during the pressure testing process, the pressure difference at two sides of the partition-type blind plate is transmitted to the inner wall of a valve chamber through the pressure release apparatus. For the large-caliber cast iron pipe pressure testing device without a backrest, the partition-type blind plate is utilized to separate the adjacent two ends; and approximately equivalent pressure are generated from the two ends of the partition-type blind plate through pressure testing of the adjacent two segments of pipes waiting for pressure testing at the same time, so that the pressure are mutually cancelled out and the wall of the valve chamber can fully accept to enable pressure testing of the pipe to have no demand for setting a backrest and an anchored pier additionally. Therefore, the large-caliber cast iron pipe pressure testing device without a backrest is simple in operation, can improve the pressure testing efficiency and reduce the construction period for pressure testing so as to improve the construction continuity and reduce the consumed materials for the construction scheme, is high in universality, and is convenient for movement.

Description

technical field [0001] The invention relates to the technical field of industrial pipeline installation, in particular to a backless pressure test device and a pressure test method for large-diameter cast iron pipelines. Background technique [0002] In the pressure test process of large-diameter long-distance cast iron pipes, due to the large diameter, the thrust generated on the pressure test blind plate can often reach tens of tons or even hundreds of tons of thrust. The more traditional method is to set a large backrest. A large concrete pier is set behind the backrest, and the pier is used to bear the pressure transmitted from the pipeline medium to the blind panel. Such a pressure test method often requires a rather long construction period, because part of the pipeline needs to be disconnected to build the town pier, and a long enough maintenance period is required after the town pier is built. There are plumbing and valve wells. This is not only time-consuming and ...

AI Technical Summary

Problems solved by technology

This is not only time-consuming and labor-intensive, but also consumes a lot of materials for the backrest scheme

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