Tearing-striping testing device for electric-melting saddle-shaped pipe

Abstract

The invention discloses a tearing-striping testing device for an electric-melting saddle-shaped pipe. The tearing-striping testing device is characterized by comprising a clamp and a drawing and connecting mechanism, wherein the clamp comprises a base and a movable side plate; the base is provided with a first clamping knife; the movable side plate is provided with a second clamping knife; the base and the movable side plate are respectively provided with a connecting fastener; the connecting fasteners lock the base and the movable side plate so as to enable the first clamping knife and the second clamping knife to clamp a tested sample; and the tested sample is fixed together with the drawing and connecting mechanism.

Description

technical field [0001] The invention relates to a tearing and peeling test device for pipe fittings, in particular to a tearing and peeling test device for electric fusion saddle shaped pipe fittings. Background technique [0002] According to the special equipment safety technical specification TSG D2002-2006 "Technical Specification for Welding Polyethylene Pipeline for Gas Use", the tearing and peeling test should be carried out for the fused saddle-shaped pipe fittings with DN>225, and the brittle damage of the welding surface can be observed to evaluate Welding process for electrofusion saddle fittings. [0003] Similarly, in accordance with the requirements of the European standard EN 1555-3: 2010 "Polyethylene (PE) piping systems for gas use - Part 3: Fittings", the tearing and peeling test should be carried out on the fused saddle fittings to determine their connection strength, test method According to ISO 13956. [0004] During the investigation of gas leakage...

AI Technical Summary

Problems solved by technology

[0008] 1. The upper fixture exerts tensile stress on the pipe fitting, and the pipe fitting is torn from the edges of both ends at the same time. In the application, after the edge is torn and warped, the upper fixture is easier to slip off from the pipe fitting, resulting in the pipe fitting failing to be removed from the pipe. The top is completely torn, and then you need to use other props

[0009] 2. Both ends of the pipe are stressed at the same time, and the stressed area is relatively large. Under the action of constant speed stretching of the stretching machine, the applied tensile stress is relatively large, and the requirements for the tensile load of the fixture and the stretching machine are relatively high.

[0010] 3. The fixture is not suitable for the fused saddle-shaped pipe fittings that are common on the market with a radian less than a semicircle.

[0011] 4. The lower fixture is used for fixing pipes, the structure is more complicated, and it is not universal for pipes of various specifications

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