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Device and method for stripping test of electro-fusion joint

A technology for peeling test and electrofusion joint, which is applied in the field of test equipment and electrofusion joint peeling test, to prevent bending, avoid toughness damage, and achieve effective peeling effect

Active Publication Date: 2013-07-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no peeling test method that meets the above requirements at home and abroad.

Method used

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  • Device and method for stripping test of electro-fusion joint
  • Device and method for stripping test of electro-fusion joint
  • Device and method for stripping test of electro-fusion joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Sample to be tested: the sample to be tested is made according to the requirements of GB / T 19808-2005, and a narrow groove 3 deep to the upper surface of the heating resistance wire 2 is processed on the surface of the sample electrofusion sleeve 1, the groove 3 is located between the sixth and seventh resistance wires. Set up a traction hole at the extended end of the sleeve of the sample. The center of the traction hole is located on the upper and lower midlines of the sleeve, and the distance between the first resistance wire and the root of the sleeve is equal. Such as figure 1 .

[0041]The bearing platform 7 of the peeling test device is as figure 2 As shown, the carrying platform 7 has 8 threaded through holes, the lower surface has 4 threaded blind holes around the center of the platform, and the central area of ​​the upper surface is processed with staggered vertical and horizontal lines. End platen 8 such as image 3 As shown, the end pressing plate 8 has...

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Abstract

The invention relates to a stripping test of an electro-fusion joint and aims at providing a device and method for a stripping test of an electro-fusion joint. The device comprises a carrying platform, an end plate pressure plate, a tail part pressure plate, a detachable joint and a chain, wherein the end part pressure plate, the tail part pressure plate and the carrying platform are connected through bolts and used for fixing a test sample; a carrying flat plate is further connected with the detachable joint through a bolt, and the detachable joint is linked with a lower clamp of a tensile testing machine through a pin; and one end of the chain is linked with an upper clamp of the testing machine, and the other end of the chain is connected with a towing hole formed in the test sample through the pin. According to the device provided by the invention, the effective length in the position of the combination surface of weld joints is reduced, and the strength is reduced so as to be favorable for realizing effective stripping of a high-strength joint test sample; and the difficulty in stripping a fusion area of the joint test sample is embodied, the influence of environmental factors is smaller, and the bonding strength of the joint can be objectively and quantitatively evaluated without relying on the subjective judgment of testing staff.

Description

technical field [0001] The invention relates to a peeling test method for testing the bonding strength of high-strength electrofusion joints and is convenient for objective and quantitative evaluation, and a set of corresponding test devices, in particular to a device and method for peeling test of electrofusion joints. Background technique [0002] Polyethylene pipe has good toughness, impact resistance, corrosion resistance, long service life, low operating energy consumption and low maintenance cost, and has been used more and more in petroleum, chemical, municipal and other fields. Electrofusion joints are one of the most widely used connection methods for polyethylene pipes and are also the weak link in the safety of piping systems. The research shows that the main failure reason of the electrofusion joint is that the bonding performance of the welding interface between the pipe and the sleeve does not meet the requirements. [0003] The peeling test can effectively si...

Claims

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Application Information

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IPC IPC(8): B29C65/82G01N3/24
Inventor 郑津洋侯东圣施建峰师俊
Owner ZHEJIANG UNIV
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