CN103234835A - Method and system for realizing interaction of high-temperature steam oxidation and high-temperature creep - Google Patents
Method and system for realizing interaction of high-temperature steam oxidation and high-temperature creep Download PDFInfo
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- CN103234835A CN103234835A CN2013101560985A CN201310156098A CN103234835A CN 103234835 A CN103234835 A CN 103234835A CN 2013101560985 A CN2013101560985 A CN 2013101560985A CN 201310156098 A CN201310156098 A CN 201310156098A CN 103234835 A CN103234835 A CN 103234835A
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Abstract
The invention belongs to the technical field of experiments of high-temperature steam oxidation and creep and particularly relates to a method and a system for realizing interaction of the high-temperature steam oxidation and the high-temperature creep. The method is characterized in that a high-temperature steam circulation channel is arranged in a sample, holes are formed in an upper pull rod and a lower pull rod of a creep machine, the sample is communicated and connected with the upper pull rod and the lower pull rod of the creep machine to form a gas channel, and the circulation of high-temperature steam in the channel is realized by external devices; the sample is externally heated, and axial load is applied to the sample, so as to realize the high-temperature creep; and the high-temperature steam realizes the circulation in a circulation loop, so as to reduce the usage amount. The method can be used for the performance evaluation on materials when a combined action of the creep and the high-temperature steam oxidation is considered, researching the influence of the high-temperature steam oxidation to the creep performance and the influence of creep behaviors to the high-temperature steam oxidation, and relatively truly and effectively reflecting a high-temperature mechanical performance evolution law of the material in a serving stage, thereby providing theoretical foundations for the safe and reliable operation of the device.
Description
Technical field
The invention belongs to high-temperature steam oxidation and the creep test technical field of material, be specifically related to the interactive method and system of the oxidation of a kind of realization high-temperature steam and high-temerature creep.
Background technology
The phenomenon of plastic yield slowly under constant temperature and constant stress effect, takes place in metal material for a long time, is called creep.The parts that produce creep in the High Temperature High Pressure thermal power plant are more,, high temperature securing member logical as main steam line, boiler header, carbonated drink pipe, steam turbine etc.Because the accumulation of metal creep, make metal parts that excessive plastic yield take place and can not use, perhaps creep has entered into the accelerated development stage, and creep rupture takes place, and component failure is damaged, even major accident takes place.So, for the high-temperature component of long-time running, carry out strict creep monitoring.Along with the develop rapidly of power industry, stainless-steel tube uses in Utility Boiler Superheater and reheater in a large number, and the high-temperature steam problem of oxidation becomes increasingly conspicuous, and becomes another hang-up of puzzlement safe operation of power plant.Under actual operating mode, creep takes place in boiler tubing material easily about temperature is up to 600 ℃, and inner-walls of duct can be subjected to the steam oxidation influence again in the high-temperature steam environment.The existing research method in this field can only be considered the influence of single factors at present, and high-temperature steam oxidation or creep so existing method can't truly reflect the high-temperature behavior evolutionary process of material, thereby can't correctly be assessed its residual life.Consult document and find, rarely have report in conjunction with the research of creep and high-temperature steam oxidation.
Summary of the invention
The invention provides the interactive method and system of the oxidation of a kind of realization high-temperature steam and high-temerature creep, can realize high-temerature creep and high-temperature steam oxidation simultaneously, the oxidation of comprehensive assessment high-temperature steam and high-temerature creep acting in conjunction are to effect of material performance.
The method of the invention is:
Be provided with the high-temperature steam circulation passage in the inside of sample, in the upper and lower pull bar internal openings of creep machine, and sample and the upper and lower pull bar of creep machine be connected, form gas passage, realize that by external unit high-temperature steam circulates in passage; Outside at sample applies axial load to its heating and to sample, realizes high-temerature creep; High-temperature steam is realized circulation in closed circuit, reduce use amount.
The interactive system of realization high-temperature steam provided by the invention oxidation and high-temerature creep is made up of high-temerature creep system and the high-temperature steam circulation system;
The structure of described high-temerature creep system is: the heating furnace of creep machine is the tubular furnace of hollow, and sample is installed in the heating furnace by upper connecting rod and lower link; Upper connecting rod and lower link are the part hollow structure, and at upper connecting rod and lower link high-temperature steam entrance and high-temperature steam outlet are set respectively; Sample is hollow structure, and two ends are tightly connected and communicate with upper connecting rod and lower link respectively; The outer wall of sample is connected with the plate of extending by tapered sleeve, and connects displacement meter in the lower end of the plate of extending;
Consisting of of the described high-temperature steam circulation system: the lower part outlet of water tank is connected with water pump, steam generator, flow controller and high-temperature steam entrance successively by pipeline; The high-temperature steam outlet is connected with the entrance of water tank by pipeline.
Described water tank, water pump, steam generator, flow controller, lower link, sample, upper connecting rod, water tank link to each other successively and form closed circuit.
Place pad between the two ends of described sample and upper connecting rod and the lower link respectively.
Beneficial effect of the present invention is:
The present invention can be used for the research of developing of material under the acting in conjunction of high-temerature creep and high-temperature steam oxidation, feed the flow of high-temperature steam by control, realize the high-temperature steam environment, namely simultaneously the researching high-temperature steam oxidation to the influence to the high-temperature steam oxidation susceptibility of the influence of croop property and creep behaviour, thereby accurately the disclose material mechanical behavior under high temperature evolution rule in stage under arms, overcome incomprehensive at high-temerature creep or the research of high-temperature steam oxidation single factors, the high-temperature behavior that effectively reflects material is for the device security reliability service provides theoretical foundation.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of described pilot system;
Fig. 2 is heating furnace part partial structurtes synoptic diagram;
Fig. 3 holds the partial structurtes synoptic diagram at position for sample adds;
Fig. 4 is the structural representation of sample;
Number in the figure:
The 1-upper connecting rod; The 2-heating furnace; The 3-tapered sleeve; The 4-sample; The 5-pad; The 6-lower link; The 7-displacement meter; Spherical Connection Block under the 8-; The 9-handwheel; The 10-balance weight; The 11-column; The outlet of 12-high-temperature steam; The 13-upper grip; The 14-lower chuck; The 15-plate of extending; The 16-stove is stifled; 17-high-temperature steam entrance; The 18-control desk; The 19-flow controller; The 20-steam generator; The 21-water pump; The 22-water tank.
Embodiment
The invention provides the interactive method and system of the oxidation of a kind of realization high-temperature steam and high-temerature creep, the present invention will be further described below in conjunction with the drawings and specific embodiments.
System of the present invention is made up of high-temerature creep system and the high-temperature steam circulation system, and as shown in Figure 1, wherein the concrete structure of heating furnace part is as shown in Figure 2 in the high-temerature creep system.
The structure of high-temerature creep system is: the heating furnace 2 of creep machine is the tubular furnace of hollow, and sample 4 is installed in the heating furnace 2 by upper connecting rod 1 and lower link 6; Upper connecting rod 1 and lower link 6 are the part hollow structure, and at upper connecting rod 1 and lower link 6 high-temperature steam entrance 12 and high-temperature steam outlet 17 are set respectively; Sample 4 is hollow structure, and two ends are tightly connected and communicate with upper connecting rod 1 and lower link 6 respectively, places pad 5 respectively between the two ends of sample 4 and upper connecting rod 1 and the lower link 6, is used for guaranteeing sealing; The outer wall of sample 4 is connected by tapered sleeve 3, upper grip 13, lower chuck 14 and the plate 15 of extending, and connects displacement meter 7 in the lower end of the plate 15 of extending; Stove stifled 16 is installed at the two ends up and down of heating furnace 2 respectively; Balance weight 10 is equipped with at the top of creep machine, and the lower end of lower link 6 is connected with following spherical Connection Block 8, and the lower end of following spherical Connection Block 8 is connected with handwheel 9.
Consisting of of the high-temperature steam circulation system: the lower part outlet of water tank 22 is connected with water pump 21, steam generator 20, flow controller 19 and high-temperature steam entrance 17 successively by pipeline; High-temperature steam outlet 12 is connected by the entrance of pipeline with water tank 22.
Creep machine passes to sample 4 by upper connecting rod 1 and lower link 6 with the load that loads.Owing to be subjected to the influence of high-temerature creep, sample can extend in the process of the test, the elongation of sample by be clamped in sample up and down the plate 15 of extending at two ends pass to the displacement meter 7 that is fixed on the plate lower end of extending, displacement meter is transferred to computer recording with the elongation of measuring.The leveling machine is by control desk 18 controls.
The deionized water that water pump 21 extracts in the water tank 22 is sent into steam generator 20.Steam generator 20 is heated as high-temperature steam with water.The high-temperature steam that is come out by steam generator 20 enters the lower link 6 of creep machine by high-temperature steam entrance 17.High-temperature steam is flowed through, and steam channels enter sample 4 inside in the lower link 6, provide high-temperature steam oxidation corrosion environment in sample 4 inside.Simultaneously, creep machine is heated, is added load to sample 4 and carries out high-temerature creep.High-temperature steam oxidation corrosion and high-temerature creep acting in conjunction have so just been realized.The high-temperature steam that flows out from sample 4 enters water tank 22 by creep machine upper connecting rod 1 through high-temperature steam outlet 12 and finishes circulation.Wherein, can control the flow of steam by flow controller 19.
The use of this system and the course of work are:
(1) upper connecting rod 1, lower link 6 are connected with sample 4;
(2) will extend plate 15 is connected with sample 4 by last lower chuck.
(3) thermopair is bundled on the sample;
(4) slowly put down heating furnace 2, by the good test parameters of computer installation, heating furnace begins heating;
(5) steam generator 20 is connected with flow controller 19, then flow controller 19 is connected to high-temperature steam entrance 17, high-temperature steam outlet 12 is connected with the entrance of water tank 22, finish the connection of external units such as high-temperature steam circulation passage;
(6) open steam generator 20 heater switch, Steam Heating to test temperature, is opened the circulation of steam flow switch steam regulation;
(7) treat that the creep temperature condition satisfies the creep test requirement, begin to load that test formally begins.
Claims (4)
1. realize high-temperature steam oxidation and the interactive method of high-temerature creep for one kind, it is characterized in that: be provided with the high-temperature steam circulation passage in the inside of sample, upper and lower pull bar internal openings in creep machine, and sample and the upper and lower pull bar of creep machine be connected, form gas passage, realize that by external unit high-temperature steam circulates in passage; Outside at sample applies axial load to its heating and to sample, realizes high-temerature creep; High-temperature steam is realized circulation in closed circuit, reduce use amount.
2. realize high-temperature steam oxidation and the interactive system of high-temerature creep for one kind, it is characterized in that, formed by high-temerature creep system and the high-temperature steam circulation system;
The structure of described high-temerature creep system is: the heating furnace of creep machine (2) is the tubular furnace of hollow, and sample (4) is installed in the heating furnace (2) by upper connecting rod (1) and lower link (6); Upper connecting rod (1) and lower link (6) are the part hollow structure, and at upper connecting rod (1) and lower link (6) high-temperature steam entrance and high-temperature steam outlet are set respectively; Sample (4) is hollow structure, and two ends are tightly connected and communicate with upper connecting rod (1) and lower link (6) respectively; The outer wall of sample (4) is connected with the plate of extending (15) by tapered sleeve (3), and connects displacement meter (7) in the lower end of the plate of extending (15);
Consisting of of the described high-temperature steam circulation system: the lower part outlet of water tank (22) is connected with water pump (21), steam generator (20), flow controller (19) and high-temperature steam entrance successively by pipeline; The high-temperature steam outlet is connected by the entrance of pipeline with water tank (22).
3. the interactive system of a kind of realization high-temperature steam according to claim 2 oxidation and high-temerature creep, it is characterized in that described water tank (22), water pump (21), steam generator (20), flow controller (19), lower link (6), sample (4), upper connecting rod (1), water tank (22) link to each other successively and form closed circuit.
4. the interactive system of a kind of realization high-temperature steam according to claim 2 oxidation and high-temerature creep is characterized in that, places pad (5) respectively between the two ends of described sample (4) and upper connecting rod (1) and the lower link (6).
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316555A (en) * | 2014-10-10 | 2015-01-28 | 广东电网有限责任公司电力科学研究院 | Varying-stress high-temperature ageing device containing water vapor |
| CN104458470A (en) * | 2014-12-10 | 2015-03-25 | 北京科技大学 | Loading system for tubular specimens with internal and external high-temperature flowing water |
| CN105021468A (en) * | 2015-07-06 | 2015-11-04 | 北京航空航天大学 | High-temperature creep fatigue test system |
| CN105136651A (en) * | 2015-08-18 | 2015-12-09 | 无锡乐华自动化科技有限公司 | Metal sheet-based wet-heat resistant property automatic detecting method |
| CN105203402A (en) * | 2015-11-03 | 2015-12-30 | 华北电力大学 | Device and method for realizing high-temperature steam oxidation and stress corrosion cracking tests simultaneously |
| CN105424497A (en) * | 2015-12-14 | 2016-03-23 | 北京科技大学 | Service-environment-like simulating device for creep performance tests of pipe fittings |
| CN105973693A (en) * | 2016-07-07 | 2016-09-28 | 华东理工大学 | Creep-fatigue property testing system with controllable oxygen partial pressure |
| CN107144475A (en) * | 2017-04-16 | 2017-09-08 | 中国科学院近代物理研究所 | Elevated temperature irradiation creep device |
| CN107478566A (en) * | 2017-07-14 | 2017-12-15 | 华北电力大学 | The acquisition methods of analysis sample are reoxidized under steam Service Environment |
| CN108195688A (en) * | 2018-02-26 | 2018-06-22 | 华能国际电力股份有限公司 | Simulate the internal pressure creep testing device and method of coal-fired plant boiler pipe Service Environment |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316555A (en) * | 2014-10-10 | 2015-01-28 | 广东电网有限责任公司电力科学研究院 | Varying-stress high-temperature ageing device containing water vapor |
| CN104458470B (en) * | 2014-12-10 | 2017-05-10 | 北京科技大学 | Loading system for tubular specimens with internal and external high-temperature flowing water |
| CN104458470A (en) * | 2014-12-10 | 2015-03-25 | 北京科技大学 | Loading system for tubular specimens with internal and external high-temperature flowing water |
| CN105021468A (en) * | 2015-07-06 | 2015-11-04 | 北京航空航天大学 | High-temperature creep fatigue test system |
| CN105136651B (en) * | 2015-08-18 | 2017-12-01 | 重庆硕奥科技有限公司 | A kind of wet-hot aging performance automatic testing method based on sheet metal |
| CN105136651A (en) * | 2015-08-18 | 2015-12-09 | 无锡乐华自动化科技有限公司 | Metal sheet-based wet-heat resistant property automatic detecting method |
| CN105203402A (en) * | 2015-11-03 | 2015-12-30 | 华北电力大学 | Device and method for realizing high-temperature steam oxidation and stress corrosion cracking tests simultaneously |
| CN105203402B (en) * | 2015-11-03 | 2018-04-10 | 华北电力大学 | The device and method of pyrogenic steam oxidation and test for stress corrosion cracking is realized simultaneously |
| CN105424497A (en) * | 2015-12-14 | 2016-03-23 | 北京科技大学 | Service-environment-like simulating device for creep performance tests of pipe fittings |
| CN105973693A (en) * | 2016-07-07 | 2016-09-28 | 华东理工大学 | Creep-fatigue property testing system with controllable oxygen partial pressure |
| CN107144475A (en) * | 2017-04-16 | 2017-09-08 | 中国科学院近代物理研究所 | Elevated temperature irradiation creep device |
| CN107144475B (en) * | 2017-04-16 | 2019-10-18 | 中国科学院近代物理研究所 | Elevated temperature irradiation creep device |
| CN107478566A (en) * | 2017-07-14 | 2017-12-15 | 华北电力大学 | The acquisition methods of analysis sample are reoxidized under steam Service Environment |
| CN107478566B (en) * | 2017-07-14 | 2020-04-14 | 华北电力大学 | Method for obtaining reoxidation analysis sample in steam service environment |
| CN108195688A (en) * | 2018-02-26 | 2018-06-22 | 华能国际电力股份有限公司 | Simulate the internal pressure creep testing device and method of coal-fired plant boiler pipe Service Environment |
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Application publication date: 20130807 |