Inner wall self-locking overall pipe high-temperature tension test clamp

Abstract

The invention discloses an inner wall self-locking overall pipe high-temperature tension test clamp. The clamp comprises a connector with one end connected with a tester pull rod, and a sliding locking part for locking the inner wall of a pipe body of an overall pipe; the sliding locking part expands outwards through inner bevels at the upper ends of sliding blocks to be clamped into a conical surface at the lower end of a cone linkage sliding core for connection, the connector enters a hollow hole of a locking nut through a threaded rod to be connected with the cone linkage sliding core, the locking nut is rotated downwards, the cone linkage sliding core pushes the three sliding blocks downwards to be kneaded inwards in the radial direction till a snap ring at the lower open end of the locking nut is clamped into a sliding block circular groove, elastic locking rings slightly protrude downwards to drive the sliding blocks to shrink inwards, the inner conical bevels of the sliding blocks are promoted to be attached to the conical surface of the cone linkage sliding core, the sliding blocks are driven to move downwards, outward pre-tightening force is provided, and the inner wall of the pipe is clamped. The clamp has the advantages that installation is convenient and rapid, the size is small, universality is good, no chock plug is needed, clamping is firm, and the situation that a sample is broken at the clamping end is avoided.

Description

technical field [0001] The invention relates to a test fixture for testing the high-temperature tensile performance of an integral pipe, especially a test fixture for testing the high-temperature tensile performance of a thin-walled pipe (with a wall thickness less than 2mm) for a full pipe section sample, and in particular to a high-temperature inner-wall self-locking integral pipe Tensile test fixture. Background technique [0002] In order to characterize the mechanical properties of materials in high-temperature environments, a series of high-temperature mechanical performance tests are usually required, one of which is high-temperature tensile tests. The test is to apply a tensile force to the sample at a specified temperature, generally stretching to fracture, thereby measuring one or more high-temperature mechanical performance indicators, in order to characterize the high-temperature mechanical properties or behavior of the material. The known high-temperature tensi...

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Problems solved by technology

[0006] In order to solve the deficiencies of the existing high-temperature tensile test fixture for pipes, the purpose of the present invention is to provide a clamp that is easy to install, small in size, good in versatility, does not need to use a plug, clamps firmly, and does not appear in the sample. Inner wall self-locking integral pipe high temperature tensile test fixture broken at the clamping end

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