Testing device for hydrostatic test of plastic pipeline

Abstract

The invention discloses a testing device for a hydrostatic test of a plastic pipeline. The device comprises blind flanges, wherein each blind flange is a square member; and mounting holes are formed at the four corners of each blind flange. The blind flanges at two ends are changed into square blind flanges on the basis of the original round blind flanges, are connected with flanges of a sample, and are connected by four long screws at the four corners of each of square blind plates, so that the stability of the blind plates is increased, the phenomenon that the leakage is caused due to pressure increase in the blind plates is avoided, and the safety factor of the test is increased; and when a welding port is burst due to water pressure during the test, high kinetic energy can be generated, and under the limiting action of the blind plates at the two ends, the burst part of the sample can stay in the original place and cannot rush out so as not to damage personnel and property.

Description

technical field [0001] The invention relates to a testing device, in particular to a testing device for hydrostatic testing of plastic pipelines, and belongs to the technical field of pipeline processing equipment. Background technique [0002] In order to measure the pressure resistance of pipelines, hydrostatic methods are usually used for testing. The determination of the hydrostatic strength is to use the extrapolation method to determine the internal pressure resistance of the plastic pipe. The principle is to maintain a specified constant hydrostatic pressure for a specified time or until the sample is destroyed. During the entire test, the sample should be kept in the specified constant temperature environment, which can be water, other liquids or air. In addition to the internal pressure resistance strength of the sample itself, what affects the effect of the hydrostatic test is also related to the airtightness of the test device. The traditional test device includ...

AI Technical Summary

Problems solved by technology

The traditional test device includes a blind flange. The blind flange is directly installed at the flanges at both ends of the sample, and the middle is sealed with a rubber gasket. A water inlet is opened on the blind flange at one end to Water pressure, the blind flange is a circular member, and the blind flange is provided with a plurality of connecting holes in the circumferential direction. During the test of the test device with this structure, the problem of airtightness often occurs, especially when the pressure gradually increases. At the same time, because the connection between the blind flange and the sample is not firm, the water pressure tends to push away the blind flange, causing pressure leakage, which makes the test fail.

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