CN202794114U - Waveguide device used under high temperature and high pressure water environment - Google Patents

Waveguide device used under high temperature and high pressure water environment Download PDF

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Publication number
CN202794114U
CN202794114U CN 201220486829 CN201220486829U CN202794114U CN 202794114 U CN202794114 U CN 202794114U CN 201220486829 CN201220486829 CN 201220486829 CN 201220486829 U CN201220486829 U CN 201220486829U CN 202794114 U CN202794114 U CN 202794114U
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CN
China
Prior art keywords
waveguide
temperature
acoustic emission
corrosion
pressure water
Prior art date
Application number
CN 201220486829
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Chinese (zh)
Inventor
段权
李涌泉
白文杰
谢旭梦
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西安交通大学
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Priority to CN 201220486829 priority Critical patent/CN202794114U/en
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Publication of CN202794114U publication Critical patent/CN202794114U/en

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Abstract

The utility model discloses a waveguide device used under high temperature and high pressure water environment. The waveguide device comprises a waveguide rod and an autoclave cover of an autoclave. The numbers of the waveguide rods decided according to the size of a corrosion test-piece and requirement of corrosion normal position monitoring. The waveguide rod is a cylinder. One end of the waveguide rod is connected with a test-piece, and the other end of the waveguide rod is fixed with melt welding of the inner side of the autoclave cover in a welding mode. An acoustic emission sensor is installed at the corresponding position of a welding joint between the outer side of the autoclave cover and the inner side of the autoclave cover. Technological difficulty of acoustic emission inspection that acoustic emission signals corroded by materials in the autoclave are transmitted to the outside of the autoclave under the condition that high temperature and high pressure tightness is not damaged is solved. A feasible and reliable researching method is provided for research material corrosion mechanism in an acoustic emission monitoring material corrosion process under a special condition.

Description

A kind of for the waveguide assembly under the High Temperature High Pressure water environment
Technical field
The utility model belongs to material corrosion acoustic emission detection field, and is particularly a kind of for the waveguide assembly under the High Temperature High Pressure water environment.
Background technology
Acoustic emission detection is a kind of novel Dynamic Non-Destruction Measurement technology that can carry out the state of defective in the whole detection and evaluation structure.Acoustic emission testing technology starts from the later stage in last century, and by the development of these decades, present acoustic emission testing technology convergence is ripe.Especially, along with the fast development of computing machine, acoustic emission has application in a lot of fields.Main petroleum chemical industry, Thermal Power Generation Industry, nuclear power industry, material test test, infrastructure project, space flight and aviation industry, metal processing industry, the traffic transport industry etc. of being applied to.Yet, when under the special operation condition conditions such as High Temperature High Pressure water environment, deep cooling and nuclear radiation, equipment being carried out acoustic emission detection, because condition restriction or instrument and equipment restriction can not be directly installed on sensor the measured piece surface, and the application of acoustic emission testing technology is restricted.
Although there are the problems referred to above, use waveguide rod auxiliary detection instrument and can realize acoustic emission detection under these special operation conditions, domesticly there are many experts and scholars to carry out research to this, proved absolutely feasibility and the reliability of waveguide rod subtest.For example, the gentle Li Wei of Daqing Petroleum Institute of the Guo Fu of Maoming College etc. are by the acoustic emission on-line monitoring to the bearing pipe leakage process, analyzed different pressures, the different leakage in the situation of aperture, the rule of the signal amplitude that the waveguide rod upper sensor receives has drawn waveguide rod and can be applied to the conclusion that pipeline gas under the special operation condition leaks acoustic emission detection.Jiang of Machinery Inst. of Tianjin Petrochemical Co. bodyguard has very been studied the impact of Waveguide on Acoustic Emission Signal, studies show that use waveguide rod after, the characteristic parameter of acoustic emission signal will change to some extent, but the variation of the value of counting and two parameters of amplitude is very little; The difference of propagating owing to the impact, the particularly velocity of sound of waveguide rod material property simultaneously, the precision in the time of will calculating the acoustic emission source location exerts an influence.The Li Shanchun of Daqing Refinery company etc. is reduced to the one dimension elastic rod with waveguide rod, analyzed the propagation characteristic of acoustic emission signal in the different-diameter waveguide rod that acoustic emission source produces, and the characteristics that in waveguide rod, reflect of acoustic emission signal, provided the mathematical model of dynamic response; Laboratory experiment by to different-diameter waveguide rod commonly used has provided acoustic emission signal propagation characteristic in waveguide rod, provides theory, experimental basis etc. for selecting propagation attenuation waveguide rod little, that propagation characteristic is good.Experimental study proves: acoustic emission signal its changes in amplitude after waveguide rod is propagated is less, illustrates that it is feasible, reliable being used for waveguide rod under the special detection conditions such as High Temperature High Pressure water environment, low-temperature deep and nuclear radiation.
Generally speaking, show different rules under the military service behavior of material in the High Temperature High Pressure water environment and the normal temperature, but because these environmental baselines are harsh, some monitoring methods are difficult to be applied in the High Temperature High Pressure water environment under the normal temperature, so the in-situ monitoring technology in the development High Temperature High Pressure water environment highly significant.Acoustic emission can carry out continuously, online, original position, non-destructive monitoring, and has very high sensitivity, therefore is one of effective ways of the research of laboratory and engineering practice situ and monitoring corrosion damage or failure procedure.But the acoustic emission research in the High Temperature High Pressure water environment also exists its singularity and difficult point.At first experiment needs to carry out in autoclave, and acoustic emission probe is difficult to stand the high temperature pressure corrosion water environment, how design and installation waveguide rod and probe, acoustic emission signal with autoclave build-in test sample under the prerequisite of not damaging system's High Temperature High Pressure sealing is delivered to outside the still as much as possible, is to carry out the problem that High Temperature High Pressure acoustic emission research at first will solve.Secondly, the acoustic emission signal of corrosion process itself is just fainter, and uses waveguide rod and sealing thereof will make signal further decay or distortion, and how extracting useful signal under the interference of back end noise is another difficult point.In addition, according to literature search, also do not report about the acoustic emission research of galvanic corrosion in the High Temperature High Pressure water environment at present, the acoustic emission research work of stress corrosion crack also seldom in the high-temperature high pressure water, and mainly concentrate on and utilize acoustic emission Calculating material stress corrosion crack crack growth rate, the corrosion mechanism of material it be unclear that in the High Temperature High Pressure water environment, has also brought difficulty to acoustic emission research.Although there is above difficulty, acoustic emission monitor(ing) continuously, the advantage such as online, harmless, make it be well suited under this harsh industrial environment of nuclear power high-temperature high pressure water, using.Therefore, the galvanic corrosion of research material under the High Temperature High Pressure water environment and the acoustic emission signal of stress corrosion crack, illustrate relevant the source mechanism of acoustic emission, seek the acoustic emission criterion of crack initiation and propagation, for the process and mechanism that discloses high-temperature high pressure water galvanic corrosion and stress corrosion crack, improve the online prison detectability of equipment corrosion inefficacy and the service life of predict device, have important theoretical and practical significance.
The utility model content
Defective or deficiency for above-mentioned prior art existence, the purpose of this utility model is, a kind of waveguide assembly that can be applicable under the High Temperature High Pressure water environment is provided, under the prerequisite of not damaging system's High Temperature High Pressure sealing with autoclave in the acoustic emission signal of material corrosion be delivered to as much as possible outside the still, by the multiple channel acousto emission detection system in-situ monitoring is carried out in corrosion simultaneously, in order to experimental study is carried out in the galvanic corrosion of material in the High Temperature High Pressure water environment and process and the mechanism of stress corrosion crack.
For achieving the above object, the utility model is by the following technical solutions:
A kind of for the waveguide assembly under the High Temperature High Pressure water environment, the kettle cover that comprises waveguide rod and autoclave, described waveguide rod one end is connected with the experiment test specimen, and the other end is welded and fixed with the inboard melting of kettle cover and is connected, and calibrate AE sensor is installed on the kettle cover outside and the position corresponding with inboard pad.
As preferred embodiment of the present utility model, described waveguide rod is connected with the experiment test specimen by corrosion resistant spring;
As preferred embodiment of the present utility model, described waveguide rod one end is connected by magnet adsorption between the test specimen with experiment;
As preferred embodiment of the present utility model, be welded and fixed by melting between described waveguide rod one end and the experiment test specimen;
As preferred embodiment of the present utility model, described waveguide rod is cylindrical structure;
As preferred embodiment of the present utility model, the corrosion resistance of described waveguide rod material therefor is better than testing the corrosion resistance of test specimen.
Compared with prior art, the utility model measurement mechanism has the following advantages at least: the utility model waveguide assembly has solved under the High Temperature High Pressure water environment, under the prerequisite of not damaging the High Temperature High Pressure sealing with autoclave in the acoustic emission signal of material corrosion be delivered to as much as possible acoustic emission testing technology difficult point outside the still, be acoustic emission monitor(ing) material corrosion process under specific condition, the research material corrosion mechanism provides a kind of feasible, reliable research means.
Description of drawings
Fig. 1 is the structural representation of the utility model waveguide assembly.
Embodiment
Be described in detail below in conjunction with accompanying drawing and a kind of embodiment of the present utility model:
The utility model provides a kind of waveguide assembly, as shown in Figure 1, comprises the kettle cover 2 of waveguide rod 1 and autoclave.The number of waveguide rod 1 is decided according to the requirement of the big or small of corrosion spool and corrosion in-situ monitoring; Waveguide rod 1 is right cylinder, and selected materials is more corrosion-resistant than the experiment test specimen, and waveguide rod one end is connected with the experiment test specimen, and the other end and kettle cover 2 inboard meltings are welded and fixed, and calibrate AE sensor is installed on kettle cover 2 outsides, and the position corresponding with inboard pad.
When using, below the experiment test specimen, corrosion-resistant spring is installed, is made close contact between experiment test specimen and the waveguide rod 1 by the spring pressure effect, and play certain fixation.What deserves to be explained is, a kind of embodiment of the present utility model, described waveguide rod one end is connected with the experiment test specimen, and described connected mode can also be fixedly connected with by modes such as melting welding, magnet adsorptions.
The utility model under the prerequisite of not damaging the High Temperature High Pressure sealing with autoclave in the acoustic emission signal of material corrosion be delivered to as much as possible outside the still, and by the multiple channel acousto emission coefficient corrosion signal is carried out in-situ monitoring, carrying out experimental study for the process of the galvanic corrosion of material in the High Temperature High Pressure water environment and stress corrosion crack and mechanism provides a kind of effective method.
The above only is a kind of embodiment of the present utility model, it or not whole or unique embodiment, the conversion of any equivalence that those of ordinary skills take technical solutions of the utility model by reading the utility model instructions is claim of the present utility model and contains.

Claims (6)

1. waveguide assembly that is used under the High Temperature High Pressure water environment, it is characterized in that: the kettle cover (2) that comprises waveguide rod (1) and autoclave, described waveguide rod one end is connected with the experiment test specimen, the other end is welded and fixed with the inboard melting of kettle cover and is connected, and calibrate AE sensor is installed on the kettle cover outside and the position corresponding with inboard pad.
2. according to claim 1 for the waveguide assembly under the High Temperature High Pressure water environment, it is characterized in that: described waveguide rod is connected with the experiment test specimen by corrosion resistant spring.
3. according to claim 1 for the waveguide assembly under the High Temperature High Pressure water environment, it is characterized in that: described waveguide rod one end is connected by magnet adsorption between the test specimen with experiment.
4. according to claim 1 for the waveguide assembly under the High Temperature High Pressure water environment, it is characterized in that: be welded and fixed by melting between described waveguide rod one end and the experiment test specimen.
5. according to claim 1 for the waveguide assembly under the High Temperature High Pressure water environment, it is characterized in that: described waveguide rod is cylindrical structure.
6. according to claim 1 for the waveguide assembly under the High Temperature High Pressure water environment, it is characterized in that: the corrosion resistance of described waveguide rod material therefor is better than testing the corrosion resistance of test specimen.
CN 201220486829 2012-09-21 2012-09-21 Waveguide device used under high temperature and high pressure water environment CN202794114U (en)

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CN 201220486829 CN202794114U (en) 2012-09-21 2012-09-21 Waveguide device used under high temperature and high pressure water environment

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Application Number Priority Date Filing Date Title
CN 201220486829 CN202794114U (en) 2012-09-21 2012-09-21 Waveguide device used under high temperature and high pressure water environment

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CN202794114U true CN202794114U (en) 2013-03-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN104569160A (en) * 2015-01-16 2015-04-29 南京工业大学 Device for detecting inner leakage of high-temperature valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN103454350B (en) * 2013-09-13 2015-06-24 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN104569160A (en) * 2015-01-16 2015-04-29 南京工业大学 Device for detecting inner leakage of high-temperature valve

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Granted publication date: 20130313

Termination date: 20150921