Fiber bragg grating sensor based intelligent flange gasket

A fiber grating and flange gasket technology, which is applied in the field of intelligent flange gaskets, can solve the problems of insufficient gasket contact stress, inability to effectively monitor gasket sealing failure status, and reduction of gasket contact stress.

Active Publication Date: 2015-07-29
WUHAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] The sealing failure of the existing flange gaskets in actual use is mainly due to the interface leakage caused by the pre-tightening force of the sealing contact surface being less than the medium pressure in it. The main influencing factors include: First, due to the actual pressure of the flange The gasket contact stress is insufficient due to the decrease of the bolt pretightening force during use; the second is the decrease of the gasket contact stress due to the creep and stress relaxation of the gasket itself
[0004] At present, there are two main types of flange gasket sealing state monitoring technologies: the first method is to measure the pre-tightening force of the bolts through a specific detection device during the initial installation of the flange gasket.

Method used

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  • Fiber bragg grating sensor based intelligent flange gasket

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Embodiment Construction

[0035] The intelligent flange gasket based on fiber grating sensing provided by the present invention is based on the metal skeleton of the corrugated composite gasket, and the fiber grating strain sensor and the fiber grating temperature sensor are respectively laid on its surface. The temperature and strain data of the gasket can be used to timely monitor the sealing force drop that may occur during the service process of the gasket, so that measures can be taken as soon as possible to prevent the occurrence of leakage accidents.

[0036] The present invention will be further described below with reference to the embodiments and the accompanying drawings, but the present invention is not limited.

[0037] The intelligent flange gasket based on fiber grating sensing provided by the present invention has the following structure: Figure 1 to Figure 7 Shown: It consists of metal skeleton 1, surface composite material 2, radial fiber grating temperature sensor 4, circumferential...

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Abstract

The invention provides a fiber bragg grating sensor based intelligent flange gasket. The fiber bragg grating sensor based intelligent flange gasket is structurally provided with a metal framework (1), wherein a radial fiber bragg grating temperature sensor (4) and a peripheral fiber bragg grating strain sensor (5) are installed on the metal framework (1). The fiber bragg grating sensor based intelligent flange gasket can achieve integration of a sealing function and a monitoring function, a sealing failure state of the gasket can be timely found so as to take preventive measures for avoiding disastrous accidents, and the fiber bragg grating sensor based intelligent flange gasket can be installed and used without existing flange structure change and is suitable for an established flange system.

Description

technical field [0001] The invention relates to a flange gasket, in particular to an intelligent flange gasket based on optical fiber grating sensing. Background technique [0002] Gasket is an extremely important sealing element in flange connection, and its performance directly affects safe production. [0003] The sealing failure of existing flange gaskets in actual use is mainly due to the interface leakage caused by the pretightening force of the sealing contact surface being less than the medium pressure therein. The contact stress of the gasket is insufficient due to the decrease of the bolt pre-tightening force during use; the second is that the contact stress of the gasket is reduced due to the creep and stress relaxation of the gasket itself. [0004] At present, there are mainly two types of monitoring technologies for the sealing condition of flange gaskets: the first method is to measure the bolt pre-tightening force through a specific detection device during t...

Claims

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Application Information

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IPC IPC(8): F16J15/06
CPCF16J15/06
Inventor 赵秀栩郭晓康郑文涵徐凤永温鹏飞张栓栓
Owner WUHAN UNIV OF TECH
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