CN104458470B

CN104458470B - Loading system for tubular specimens with internal and external high-temperature flowing water

Info

Publication number: CN104458470B
Application number: CN201410758286.XA
Authority: CN
Inventors: 陆永浩; 孙冬柏
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2014-12-10
Filing date: 2014-12-10
Publication date: 2017-05-10
Anticipated expiration: 2034-12-10
Also published as: CN104458470A

Abstract

The invention discloses a loading system for tubular specimens with internal and external high-temperature flowing water. The system comprises an autoclave, a specimen clamping system inside the autoclave, and a loading system outside the autoclave. The device can be used for loading test tubes with different temperatures, different pressures and water chemistry inside and outside the tubular specimens, and is applicable to tests in the aspects of corrosion, stress corrosion, corrosion fatigue, flow accelerated corrosion and the like of the tubular specimens through complex flow inside and outside the test tubes and complex load coupling effect of the test tubes. Especially, the working conditions of a heat exchange tube of a steam generator in a nuclear reaction pressurized-water reactor can be simulated to carry out related testing, research and evaluation on the heat exchange tube.

Description

A kind of loading system to the tubular specimen with inside and outside flowing high-temperature water

Technical field

The invention belongs to simulate the experimental rig field of HTHP steam environment, be related to one kind can be to having inside and outside tube wall There are different temperatures, different pressures and hydrochemical developmental tube to be loaded, it is adaptable to which developmental tube is inside and outside with Complex Flows and multiple Burn into stress corrosion, corrosion fatigue and the flowing of tubular specimen under miscellaneous load coupling promotes the test of the aspects such as corrosion.It is special , the operating mode of steam generator heat-exchange tube in pressure water reactor of nuclear reaction can not simulated, heat-exchange tube is carried out dependence test and Research.

Background technology

With China's nuclear power and thermoelectricity industry develop rapidly, their security become country and common people's extensive concern Major issue.Burn into stress corrosion under HTHP steam environment, and the fatigue under this particular surroundings, creep, mill Damage etc. becomes one of subject matter of impact nuclear power, thermoelectricity safety in operation and economy.But they are in terms of study mechanism Limitation is the main cause that stress corrosion, high temperature corrosion rupture and other failure modes why are not yet solved over 20 years.Cause This, needs a kind of experimental provision to carry out corrosion and stress corrosion cracking problem of the research material under HTHP water environment.

Means more common in the world at present are stretched slowly in high temperature and high pressure kettle, mainly by controlled loading Pattern, in autoclave build-in test standard specimen（Compact tensile specimen, circle bar samples etc.）Power in HTHP water environment Performance is learned, master data is accumulated, and the life prediction of material is carried out with this.But power station（Nuclear power station and thermal power station）The pass of middle military service In the form of pipe, due to form effect, general standard is to standard specimen for key material great majority（Compact tension specimen, pole etc.） The slow stretcher of autoclave accurately test cannot be made to tubular specimen and is evaluated, especially, generation complete so far Boundary is also not set up the HTHP steam environmental test platform of a set of stress corrosion to steam generator heat-exchange tube, so as to Limit respective members and be compared accurate life prediction.Therefore, with power industry safety as background, set up accurate to pipe examination Sample is particularly the HTHP steam environment charger of heat-exchange tube, carries out clothes of the associated materials in HTHP steam environment Labour behavior and weakening mechanisms research, can greatly improve research level of the China in association area, and for State Grid's industry Safety, economical operation provide technical support.

The content of the invention

It is an object of the invention to set up a kind of tubular specimen with the flowing of inside and outside side in HTHP steam environment Loading system.

A kind of loading system to the tubular specimen with inside and outside flowing high-temperature water, the loading system includes autoclave, height Outer loading system of sample holder system, autoclave etc. in pressure kettle, wherein, the autoclave is used for forming the high temperature outside developmental tube High-pressure water vapor environment；Sample holder system arranges water channel at sample chuck in the autoclave, and high-temperature high pressure water is by flexible Pipe enters chuck water channel and into developmental tube inner side, the flowing on the inside of developmental tube is formed, then by chuck water channel by high temperature Water under high pressure draws developmental tube, finally flows out the autoclave；Developmental tube inner side and outer side can respectively form different temperatures, pressure With hydrochemical HTHP water environment；Sample chuck is clamped or by welding or other modes connection to tubular specimen, The outer loading system of autoclave carries out the loading of quiet, dynamic isotype to developmental tube sample.

Wherein, the loading system carries out the loading of corresponding modes to developmental tube, completes in respective flow environment Duct test part carry out quiet, dynamic and Combined Loading, for study aging duct test part, burn into stress corrosion, corrode it is tired Labor, corrosion creep and its coupling behavior and mechanism.

Wherein, the corresponding loading mode refers to dead load, slow stretching and low cycle fatigue loading mode, and respective flow environment is Refer to subcritical and overcritical water vapour environment.

Wherein, the grasping system arranges telescoping tube, and the telescoping tube is placed in the internal or external of autoclave, introduces and draws Fluid on the inside of developmental tube, for coordinating the elongation of the caused developmental tube due to stretching.

Description of the drawings

Fig. 1 is the schematic diagram of the loading system of the tubular specimen with inside and outside flowing high-temperature water.

Specific embodiment

The system is made up of outer loading system of sample holder system, autoclave in autoclave, autoclave etc..

As shown in figure 1, tubular specimen is connected with sample holder system by modes such as welding, arrange in sample holder system Water channel, additional high-temperature high pressure water is entered in autoclave by water pipe 1 and 4, is flowed through pipe with spiral pipe, the water channel of sample holder system and is entered Enter developmental tube inner side, form the flowing on the inside of developmental tube, then by the water channel 2 and 3 of grasping system, flow out autoclave.Wherein Water pipe 1, between 2,3,4,5,6 and autoclave all be fixing seal, be conducive to the sealing under HTHP water environment.The opposing party Face, the upper grasping system of tubular specimen is hung on autoclave inner support, and power is drawn high pressure by lower grasping system by tensile axis Kettle, is connected to the outer loading system of autoclave.The outer loading system of autoclave can complete to complete tubular specimen dead load, slow stretching and The loading of low cycle fatigue isotype.

So, it is used for being formed in HTHP steam environment, injection testing pipe and test in the design mesohigh kettle system Pipe is outer（In autoclave）High-temperature high pressure water can have different temperatures, pressure and chemical environment of water.Therefore this device can be studied There is stress corrosion, the corruption of pipeline under internal and external temperature gradient, different pressures and different water vapour environments under the conditions of Subcritical Water Condition The behaviors such as fatigue and creep are lost, the interior water flowing of individually pipe can be also studied or be managed the operating mode of outer water flowing.

The above is only the preferred embodiment for the present invention.

It should be pointed out that for the member of ordinary skill of the art, in the premise without departing from the technology of the present invention principle Under, some improvement and modification can also be made, these are improved and modification should also be considered as protection scope of the present invention.

Claims

1. it is a kind of to it is inside and outside flowing high-temperature water tubular specimen loading system, it is characterised in that the loading system includes The outer loading system of sample holder system, autoclave in autoclave, autoclave, wherein, the autoclave is used for forming tubular specimen Outside HTHP steam environment；Sample holder system arranges water channel, high temperature at tubular specimen chuck in the autoclave Water under high pressure enters chuck water channel and into developmental tube inner side by telescoping tube, forms the flowing on the inside of developmental tube, then passes through High-temperature high pressure water is drawn tubular specimen by chuck water channel, finally flows out the autoclave；Tubular specimen inner side and outer side can be divided Xing Cheng not different temperatures, pressure and hydrochemical HTHP water environment；Sample chuck is clamped to tubular specimen or passed through Welding manner connects, and the outer loading system of autoclave carries out the loading of quiet, dynamic mode or composite mode to tubular specimen.

2. a kind of loading system to the tubular specimen with inside and outside flowing high-temperature water as claimed in claim 1, its feature exists In the outer loading system of the autoclave carries out the loading of corresponding loading mode to tubular specimen, completes in respective streams rotating ring Tubular specimen in border carries out the loading of quiet, dynamic or composite mode, for studying aging tubular specimen, burn into stress corrosion, corruption Erosion fatigue, corrosion creep and its coupling behavior and mechanism.

3. a kind of loading system to the tubular specimen with inside and outside flowing high-temperature water as claimed in claim 2, its feature exists Refer to dead load, slow stretching or low cycle fatigue loading mode in, the corresponding loading mode, respective flow environment refer to it is subcritical or Overcritical water vapour environment.

4. a kind of loading system to the tubular specimen with inside and outside flowing high-temperature water as claimed in claim 1, its feature exists In sample holder system arranges telescoping tube in the autoclave, and the telescoping tube is placed in the internal or external of autoclave, introduces and draw The fluid gone out on the inside of tubular specimen, for coordinating the elongation of the caused tubular specimen due to stretching.