Testing method for creep relaxation of non-metal sealing gasket

A sealing gasket and creep relaxation technology, which is applied in the field of non-metallic sealing gasket testing, can solve the problems of difficult collection of effective data, many influencing factors, and low test efficiency, and achieve the effect of high test efficiency and simple test equipment

Inactive Publication Date: 2014-02-12
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology

[0022] 1) Plan 1 must be completed in a standard laboratory, and it needs to be equipped with computers, air conditioners, and thermohumidifiers. It takes half a month to complete a round of test data, and the test efficiency is low and the cost is high;
[0023] 2) The ultrasonic length measurement method of option two has many influencing factors, the bolts are prone to failure, and the effective data is difficult to collect
[0024] 3) Bo

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  • Testing method for creep relaxation of non-metal sealing gasket

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Embodiment Construction

[0042] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment. It should be understood that the "upper", "lower", "left", "right", "front" and "reverse" mentioned in the following embodiments of the present invention are all based on the directions shown in the figures, These words used to limit the direction are only for convenience of description, and do not mean to limit the specific technical solution of the present invention.

[0043] The non-metallic sealing gasket creep relaxation test method of the present invention evaluates the creep of the gasket by comparing the ability of similar products to maintain a given compressive stress over time under the same control conditions, that is, the degree of bolt torque loss relaxation rate. The test device is simple, and the finished ga...

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Abstract

The invention discloses a testing method for creep relaxation of a non-metal sealing gasket. The testing method comprises the following steps of (1) clamping the gasket; (2) tightening to an initial torque; (3) insulating by an aging box; (4) carrying out air cooling to room temperature; and (5) testing the residual torque, and screwing a torque bolt again by using a torque wrench so as to test the residual torque. Compared with the similar products, the testing method for creep relaxation of the non-metal sealing gasket, disclosed by the invention, has the advantages that under the same control condition, the capability of given compression stress is maintained along with the passage of time, and the creep relaxation of the gasket is evaluated by the degree of bolt torque loss; and a testing device is simple, a finished gasket can be directly tested on a production site, and the testing efficiency is high.

Description

technical field [0001] The invention relates to the field of testing non-metallic sealing gaskets, in particular to a method for testing the creep relaxation of non-metallic sealing gaskets. Background technique [0002] Non-metallic sealing gaskets are made of plate-like materials through stamping or cutting processes, and are used for sealing connections between pipes and flanges. The gaskets are fixed between the two parts by bolts for sealing. [0003] Creep relaxation rate is an important quality index in evaluating the sealing properties of non-metallic gasket materials. The appropriate creep relaxation rate is related to the material selection of the gasket. A higher creep relaxation rate will cause the gasket to have poor sealing performance and short service life. [0004] There are two methods for testing the creep relaxation rate of non-metallic gasket materials: residual load method and ultrasonic length measurement method. [0005] 1. Residual load method: Und...

Claims

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Application Information

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IPC IPC(8): G01N3/28
Inventor 赵添常黄传刚刘浩宇潘斯宁秦栋
Owner GUANGXI YUCHAI MASCH CO LTD
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