CN201852773U - Corrosion fatigue tester with high-temperature and high-pressure circulating water - Google Patents
Corrosion fatigue tester with high-temperature and high-pressure circulating water Download PDFInfo
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- CN201852773U CN201852773U CN2010202766563U CN201020276656U CN201852773U CN 201852773 U CN201852773 U CN 201852773U CN 2010202766563 U CN2010202766563 U CN 2010202766563U CN 201020276656 U CN201020276656 U CN 201020276656U CN 201852773 U CN201852773 U CN 201852773U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 194
- 238000005260 corrosion Methods 0.000 title claims abstract description 40
- 230000007797 corrosion Effects 0.000 title claims abstract description 40
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 23
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 23
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000011068 loading method Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 238000009661 fatigue test Methods 0.000 claims description 23
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- 229910052760 oxygen Inorganic materials 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 239000006101 laboratory sample Substances 0.000 claims description 19
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 229920000742 Cotton Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
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- 239000002360 explosive Substances 0.000 claims description 6
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- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 24
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Abstract
The utility model pertains to the field of material tests, relating to a corrosion fatigue tester with high-temperature and high-pressure circulating water. The corrosion fatigue tester solves the problems of complicated structure, inconvenience in use and maintenance and the like in the prior art. The corrosion fatigue tester comprises a high-temperature and high-pressure circulating water system, an autoclave and a fatigue machine, wherein the high-temperature and high-pressure circulating water system is communicated with the autoclave; experimental samples are arranged in the autoclave and connected with a loading part of the fatigue machine; the high-temperature and high-pressure circulating water system comprises a water storage tank, a circulating pump, a high-pressure pump, a buffering tank, a heat exchanger, a preheater, a condenser, a back pressure valve and an ion exchange resin; the inlet of the autoclave is connected with the heat exchanger by a pipeline; the preheater is arranged on the pipeline; and the outlet of the autoclave is connected with the heat exchanger by a pipeline. The high-temperature and high-pressure circulating water system supplies high-temperature and high-pressure water required in experiments for the autoclave, the fatigue machine loads fatigue on the experimental samples in the autoclave, and a control system controls the high-temperature and high-pressure circulating water system and the fatigue machine.
Description
Technical field
The utility model belongs to the material experiment field, more precisely, relates to a kind of corrosion fatigue testing device with High Temperature High Pressure recirculated water.
Background technology
The corrosion fatigue of material under high temperature and high pressure environment is the significant problem that many fields face, as industries such as oil, chemical industry, electric power.At present; China is in nuclear power great development period, and nuclear power is solving energy crisis as a kind of energy of efficient, stable, economic, cleaning; improving the environment aspect has significant advantage, however the safety problem that key factor is a nuclear power station that the restriction nuclear power develops rapidly.Commercial nuclear power plant mainly adopts light water reactor at present, because the Service Environment of light water reactor nuclear power station is (280-325 ℃ of a high-temperature high pressure water, 8-16MPa), its pressure member such as pressure vessel, steam generator, return line, heat exchanger etc. all bear certain military service stress, serious etching problem may take place in its construction material, typical in corrosion fatigue, stress corrosion, erosion corrosion, crevice corrosion, spot corrosion or the like, to the very big potential threat of safe operation formation of nuclear power station.Therefore, the corrosion fatigue problem that simulation nuclear power High Temperature High Pressure water environment is studied the pressure member material in the laboratory has great importance.At first must solve the device problem of carrying out torture test under the high-temperature high pressure water environmental baseline and carry out this class research.Because High Temperature High Pressure water environment harshness, require very high to test unit, implement very difficulty, at present have only major company of several family can produce complete test unit abroad, but price is extremely expensive, and complex structure, use, maintenance, repair all bother very much, and domestic relevant producer does not still make the ability of such set of equipments.
The utility model content
The utility model purpose be to provide a kind of can be under High Temperature High Pressure recirculated water environment the device of test material Corrosion Fatigue Properties, solve problems such as the complex structure that exists in the prior art, working service trouble.
The technical solution of the utility model is as follows:
A kind of corrosion fatigue test device with High Temperature High Pressure recirculated water, this device is provided with High Temperature High Pressure circulation, autoclave, fatigue machine, the High Temperature High Pressure circulation is communicated with autoclave, and laboratory sample is arranged in the autoclave, and laboratory sample is connected with the loading section of fatigue machine;
The High Temperature High Pressure circulation comprises water tank, ebullator, high-pressure pump, surge tank, heat exchanger, primary heater, condenser, counterbalance valve, ion exchange resin, the water delivering orifice of water tank connects ebullator by pipeline, and outlet of circulating pump connects and connects a loop and secondary circuit by pipeline respectively; Two-way is divided in one loop after one section pipeline, the first via directly is connected with water tank, the second tunnel with the tank connected pipeline of water storage be provided with ion exchange resin; The pipeline of secondary circuit is provided with high-pressure pump, surge tank, heat exchanger, condenser, counterbalance valve, the outlet of pipeline insert a loop the second the tunnel on;
The inlet of autoclave connects heat exchanger by pipeline, is provided with primary heater on described pipeline, and the outlet of autoclave connects heat exchanger by pipeline.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, the top of water tank is provided with filling opening and gas outlet, and the gas outlet of water tank is connected with exhaust apparatus.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, the bottom of water tank is provided with freeing port, water delivering orifice, oxygen intake, nitrogen inlet, freeing port is connected manual modulation valve respectively with water delivering orifice, and nitrogen inlet is connected nitrogen pot and oxygen tank respectively with oxygen intake.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, outlet of circulating pump connects a cotton filter, the outlet of cotton filter is divided into a loop and secondary circuit, and a loop is provided with manual modulation valve, water inlet spinner-type flowmeter, ohmmeter, and secondary circuit is provided with manual modulation valve.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, the second tunnel and the tank connected pipeline of water storage in a loop are provided with two manual modulation valves, are connected with bypass on the ion exchange resin, and bypass is provided with manual modulation valve; The outlet of secondary circuit pipeline insert a loop the second the tunnel on pipeline between two manual modulation valves.The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water is equipped with safety valve on the pipeline between surge tank and the heat interchanger.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, security filtrator on the pipeline between counterbalance valve and the condenser, the outlet and the pipeline between the counterbalance valve of secondary circuit pipeline are provided with the water outlet spinner-type flowmeter.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water, autoclave is upside down on the fatigue machine saddle, the high pressure kettle cover is following, autoclave body is last, and the upper end of autoclave is fixed on the crossbeam of fatigue machine, and the lower end of autoclave is connected with the water collar device, autoclave covers the water delivering orifice that connects heat interchanger and is connected with water inlet, be connected with stainless-steel tube on the water delivering orifice of autoclave inboard, stretch into the autoclave body bottom, the water delivering orifice in the autoclave outside is connected with explosive valve.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water is established sample clamp in the autoclave, sample clamp is fixed on autoclave by column and covers; Laboratory sample one end is fixed on the sample clamp, and the other end connects an end of tensile axis, and the other end of tensile axis passes water cooling plant and connects the fatigue machine gearing.
The corrosion fatigue testing device of described band High Temperature High Pressure recirculated water also is provided with High Temperature High Pressure recirculated water switch board and fatigue machine switch board, and High Temperature High Pressure recirculated water switch board connects ebullator, high-pressure pump, primary heater, autoclave; Fatigue machine is connected with the fatigue machine switch board.
The beneficial effects of the utility model are:
1, high-temperature high pressure water circulation of the present utility model can be controlled water chemistry parameters such as temperature, pressure, resistivity, dissolved oxygen DO, can add special ion according to requirement of experiment, thereby can simulate some actual Service Environment, as the presurized water reactor of light water reactor nuclear power station and the High Temperature High Pressure water environment in the boiling-water reactor.
2, high-pressure pump of the present utility model and counterbalance valve can regulate accurately recirculated water pressure (0～20MPa), by primary heater and autoclave water is heated to 400 ℃ from room temperature then.
3, ion exchange resin of the present utility model can remove the foreign ion in anhydrating, and accurately controls resistivity of water (0-18M Ω .cm) and can close ion exchange resin as required, and oxygen tank and nitrogen pot can be regulated the dissolved oxygen content of feeding.
4, the utility model can carry out fatigue experiment in the actual High Temperature High Pressure water environment of simulation, and logical tensile axis connects laboratory sample and fatigue machine gearing, thereby sample is carried out the fatigue loading of multiple wave mode.
5, the utility model adopts pressure balanced design, guarantees that tensile axis is not subjected to the pressure influence in the autoclave in the fatigue experiment process, make experiment more accurate.
6, pressure equilibrium axle of the present utility model adopts sealing and water cooling plant, guarantees that the pressure equilibrium axle keeps excellent sealing performance when to-and-fro movement.
7, the utility model is realized computer controlled automatic and data acquisition, and is stable, safe and reliable.
8, the utility model is with low cost, simple to operate.
Description of drawings
Fig. 1 is the whole structure drawing of device of the utility model.
Fig. 2 is the range of stress and the circulation cycle curve of homemade pressure vessel with SA508-3 low alloy steel high temperature pressure corrosion fatigue experiment.
Among Fig. 1, the 1-water tank; The 2-exhaust apparatus; The 3-nitrogen pot; The 4-oxygen tank; The 5-ebullator; The 6-cotton filter; The 7-high-pressure pump; The 8-surge tank; The 9-heat exchanger; The 10-primary heater; The 11-tensile axis; The 12-water collar; The 13-saddle; The 14-laboratory sample; The 15-autoclave; The 16-fatigue machine; The 17-condenser; 18-security filtrator; The 19-counterbalance valve; 20-water outlet spinner-type flowmeter; 21-ion exchange resin; The 22-spinner-type flowmeter of intaking; The 23-ohmmeter; 24-High Temperature High Pressure recirculated water switch board; 25-fatigue machine switch board; The 26-computer; 27 high pressure kettle covers; 28 autoclave bodies; The 29-snorkel; V1～V7-manual modulation valve; The S1-safety valve; The S2-explosive valve.
Embodiment
As shown in Figure 1, the utility model provide a kind of can be under High Temperature High Pressure recirculated water environment the device of test material Corrosion Fatigue Properties, this device mainly is made up of High Temperature High Pressure circulation, autoclave, fatigue machine, control system four parts.The High Temperature High Pressure circulation is communicated with autoclave, the High Temperature High Pressure circulation is for providing experiment required high-temperature high pressure water in the autoclave, laboratory sample is arranged in the autoclave, laboratory sample is connected with the loading section of fatigue machine, fatigue machine carries out fatigue to the laboratory sample in the autoclave and loads, control system is controlled the whole High Temperature High Pressure circulating water fatigue machine of unifying, thereby realizes that high-temperature and high-pressure conditions corrosion fatigue down tests, and is specific as follows:
One 150 liters organic glass water tank 1 is arranged in the High Temperature High Pressure circulation, water tank provides the water source for this circulating water loop, water after the test is got back to water tank again through behind a series of cold filtrations, and whole High Temperature High Pressure recirculated water forms the loop of a sealing.A filling opening is arranged on the water tank 1, ready solution is injected water tank 1 from filling opening, general institute adds solution liquid level arrival water tank height 2/3rds and gets final product.The gas outlet on water tank 1 top also connects an exhaust apparatus 2, can and prevent that outside air from entering water tank 1 with the discharge of the air in the water tank 1.A freeing port, water delivering orifice, oxygen intake, nitrogen inlet are respectively arranged at water tank 1 bottom, and a manual modulation valve V1 is arranged on the described freeing port, are used for controlling the water of whether discharging in the water tank; A manual modulation valve V2 is also arranged on the described water delivering orifice, be used for controlling the flow that enters solution in the circulating water loop; Nitrogen inlet is connected nitrogen pot 3 and oxygen tank 4 respectively with oxygen intake, be used for controlling the dissolved oxygen content in the water tank 1, the end that nitrogen inlet and oxygen intake stretch into water tank 1 is inserted with the snorkel 29 of porous respectively, so that gas slowly enters water tank 1 uniformly.
The water delivering orifice of water tank 1 connects ebullator 5 by pipeline, is provided with manual modulation valve V2 on described pipeline, and the outlet of ebullator 5 connects a loop and secondary circuit by pipeline respectively.On the pipeline between a described loop, secondary circuit and the ebullator 5, be provided with cotton filter 6.Two-way is divided afterwards at one section pipeline (being provided with manual modulation valve V4, water inlet spinner-type flowmeter 22, ohmmeter 23 on this section pipeline) in one loop, the first via directly is connected with water tank 1, the second tunnel pipeline that is connected with water tank 1 is provided with manual modulation valve V5, manual modulation valve V6, ion exchange resin 21, be connected with bypass on the ion exchange resin 21, bypass is provided with manual modulation valve V7.Be provided with manual modulation valve V3, high-pressure pump 7, surge tank 8, heat exchanger 9, condenser 17, security filtrator 18, counterbalance valve 19, water outlet spinner-type flowmeter 20 on the pipeline of secondary circuit successively, the outlet of pipeline insert a loop the second the tunnel on pipeline between manual modulation valve V5, the manual modulation valve V6.
The inlet of autoclave 15 connects heat exchanger 9 by pipeline (described pipeline is provided with primary heater 10), and the outlet of autoclave 15 connects heat exchanger 9 by pipeline (described pipeline is provided with explosive valve S2).
During work, open the manual modulation valve V2 of water delivering orifice front, water tank 1 bottom, solution enters ebullator 5, described ebullator 5 makes the solution in the water tank 1 enter whole loop, ebullator 5 connects a cotton filter 6, the large granular impurity of this cotton filter 6 in can filtering solution, solution is divided into two-way then: a loop and secondary circuit, one loop is a normal temperature and pressure solution, a manual modulation valve V4 is arranged before the loop, control enters the solution in a loop, a water inlet spinner-type flowmeter 22 is arranged behind the manual modulation valve V4, can show the liquid inventory that enters a loop, behind the water inlet spinner-type flowmeter 22 ohmmeter 23 is arranged, can the test loop resistivity of water, solution is divided into two-way then, one the tunnel flows directly into water tank 1, this road mainly is in order to shunt, so that better regulate the flow that another road flows into ion exchange resin 21, water tank 1 is flowed back to after filtering through ion exchange resin 21 in another road, connects a bypass on the ion exchange resin 21, a manual modulation valve V7 is arranged in the bypass, be used for controlling unlatching or closing bypass, ion exchange resin 21 preceding two manual modulation valve V5 and V6 are used for controlling the liquid inventory that enters ion exchange resin.When the loop need add ion, both can close manual modulation valve V5 and V6, open the manual modulation valve V7 in the bypass; During ion in needing filtering solution, can close bypass manual modulation valve V7, and open manual modulation valve V5 and V6, make a loop solution all pass through ion exchange resin 21, one loop solution can make the solution in the water tank 1 reach requirement of experiment through constantly circulation.
Secondary circuit solution is through a manual modulation valve V3, enter high-pressure pump 7 pressurizations, buffering through surge tank 8 makes pressure more steadily enter afterwards heat exchanger 9 then, and a safety valve S1 is installed in surge tank 8 backs, can pressure release protect whole loop when pressure surpasses setting value; Solution enters primary heater 10 and heats after heat exchanger 9 abundant heat exchange, after being heated to setting value, enter autoclave 15 and continue to be heated to experimental temperature, solution from autoclave flow out enter heat exchanger 9 and carry out heat interchange after, cool to room temperature through condenser 17, after entering counterbalance valve 19 then and carrying out back pressure, solution pressure becomes normal pressure, flows into ion exchange resin 21 then and filters, flow back to water tank 1 at last, finish one bout.Autoclave outlet has an explosive valve S2, is used for avoiding the overvoltage of autoclave internal cause and the blast that causes.An aperture 50 purpose security filtrators 18 are arranged before the counterbalance valve 19, thereby being used for impurity screening avoids counterbalance valve to stop up, there is a water outlet spinner-type flowmeter 20 counterbalance valve 19 back, are used for showing the flow of secondary circuit.
Whole High Temperature High Pressure circulation is by 24 controls of High Temperature High Pressure recirculated water switch board; High Temperature High Pressure recirculated water switch board 24 is switch, the switch of high-pressure pump 7, the temperature control of primary heater 10, the temperature control of autoclave 15, the demonstration of high-pressure pump 7 discharge pressures, the demonstration of autoclave 15 internal pressures, overvoltage temperature alarm, the emergency stop button of Control Circulation pump 5 in the usual way, thereby regulates temperature, pressure and the flow of recirculated water accurately.Fatigue machine 16 is connected with fatigue machine switch board 25, can operate by 25 pairs of fatigue machines of fatigue machine switch board, on switch board, control model, load, displacement, frequency, waveform etc. can be set in the usual way, thereby the laboratory sample 14 in the autoclave 15 is carried out fatigue experiment.Switch board connects a computer 26, can write down the fatigue experiment data, and can realize the automatic control to fatigue machine.
Move the corrosion fatigue testing device of this cover band High Temperature High Pressure recirculated water, comprise the steps:
1, water tank 1 water filling.Close manual modulation valve V1, V2, open the filling opening above the water tank 1, the injection experiments water, to arrive water tank 1 highly about 2/3rds the time when water level, thinks that water filling finishes.
2, dress laboratory sample.Open fatigue machine switch board 25, the entablature of fatigue machine 16 is moved up, thereby move on the autoclave body 28 of drive autoclave 15, separately behind autoclave body 28 and the high pressure kettle cover 27, laboratory sample 14 lower ends are fixed on the tensile axis 11, handle fatigue machine switch board 25 then, tensile axis 11 is moved up, after the anchor clamps upper mounting plate is withstood in the laboratory sample upper end, tighten the anchor clamps bolt, sample is fixed at two ends up and down.
3, tighten autoclave.After having adorned test specimen, handle fatigue machine switch board 25, put down the fatigue machine entablature, make autoclave body 28 and the 27 abundant combinations of high pressure kettle cover, tighten the kingbolt below the autoclave then, autoclave is sealed fully.
4, logical recirculated water.Open manual modulation valve V1, V2, water tank 1 and loop are connected, open High Temperature High Pressure recirculated water switch board 24, open the shift knob of ebullator 5, the water of water tank 1 is sent into a loop and secondary circuit respectively, regulate manual modulation valve V3, V4, observation water outlet spinner-type flowmeter 20, water inlet spinner-type flowmeter 22 make the flow that flows into two loops moderate.
5, recirculated water filters.Filtration cycle water is opened manual modulation valve V4, V5, V6 if desired, closes manual modulation valve V7, makes the interior water outlet of still all by ion exchange resin 21, and fully circulation is satisfied requirement of experiment up to resistivity of water; If added special ion in the recirculated water, close manual modulation valve V6, open manual modulation valve V7, make recirculated water not pass through ion exchange resin.
6, recirculated water boosts.Open the shift knob of high-pressure pump 7 on the High Temperature High Pressure recirculated water switch board 24, the stroke of manual adjustments high-pressure pump 7 is slowly tightened counterbalance valve 19 then to the right, and this moment, pressure rose gradually, up to reaching experimental pressure.
7, recirculated water heating.The running water switch of heating front opening condenser 17 and water cooling plant 12, open primary heater 10 and autoclave 15 temperature control buttons on the High Temperature High Pressure recirculated water switch board 24 then, set experimental temperature, opening heat button then makes it temperature automatically controlled, the interior temperature of still this moment rises gradually, after arriving design temperature, the temperature regulating device in the High Temperature High Pressure recirculated water switch board 24 is regulated voluntarily to its temperature, up to temperature stabilization.
8, the tired loading.Open computer 26; open the conventional Control Software of fatigue machine 16; set the parameter (control model, waveform, frequency, circulation cycle, stress, strain, halt condition) of fatigue experiment; open automatically then and load; the operation of computer 26 control fatigue machines at this moment, experimental data is kept at computer hard disc automatically.
9, stop experiment.Reach the condition of setting when fatigue experiment after, stop the fatigue machine Control Software on the computer 26, preserve experimental data, close the primary heater 10 on the High Temperature High Pressure recirculated water switch board 24 and the heater switch of autoclave 15 then, this moment, temperature in the kettle reduced gradually, after arriving room temperature, regulate counterbalance valve 19 left, make pressure be reduced to zero, the stroke of regulating high-pressure pump 7 is zero, closes ebullator 5 and high-pressure pump 7, makes water stop circulation, close the tap water of condenser 17 and water cooling plant 12 then, experiment finishes.
Embodiment 1
Homemade pressure vessel dissolves corrosion fatigue experiment in the oxygen-saturated High Temperature High Pressure recirculated water with SA508-3 low alloy steel at 300 ℃, 10MPa, DO, and the strain amplitude is 2.18%.
The laboratory sample material is a kind of homemade nuclear plant pressure vessels SA508-3 low alloy steel, be processed into smooth pole sample, gauge length is 16mm, and diameter is 8mm, and fatigue samples is fixed on the anchor clamps, tighten autoclave, after the water tank fills with water, aerating oxygen makes the oxygen that keeps 0.2～0.5MPa in the water tank be depressed into few 12 hours, dissolved oxygen DO in the water reach capacity (8ppm), start High Temperature High Pressure recirculated water switch board and fatigue machine switch board, start ebullator, water is all filtered through ion exchange resin, when going out water power resistivity＞10M Ω .cm, open high-pressure pump, adjustment stroke is 12mm, regulates counterbalance valve then, making pressure is 10MPa, the primary heater temperature is set at 350 ℃, and autoclave temp is set at 300 ℃, starts heater switch, after temperature in the kettle arrives design temperature, stablized 30 minutes, and opened the fatigue machine Control Software on the computer then, the setting control model is displacement, waveform is a triangular wave, and strain rate is 0.001s
-1, the strain amplitude is made as 2.18%, boundary condition be made as when peak stress drop to the maximum stable stress value 75% the time stop the experiment, the cycle index N that it is corresponding
25Be defined as fatigue lifetime.When the circulation cycle reached for 1719 weeks, experiment stopped.Fig. 2 is the stress amplitude (2.18%) and circulation cycle curve of experimental record, and be 1719 cycles fatigue lifetime.
Homemade pressure vessel is 1.9% o'clock high temperature pressure corrosion fatigue experiment in the strain amplitude with SA508-3 low alloy steel.
The laboratory sample material is a kind of homemade nuclear plant pressure vessels SA508-3 low alloy steel, be processed into smooth pole sample, gauge length is 16mm, and diameter is 8mm, and fatigue samples is fixed on the anchor clamps, tighten autoclave, after the water tank fills with water, aerating oxygen makes the oxygen that keeps 0.2～0.5MPa in the water tank be depressed into few 12 hours, dissolved oxygen DO in the water reach capacity (8ppm), start High Temperature High Pressure recirculated water switch board and fatigue machine switch board, start ebullator, water is all filtered through ion exchange resin, when going out water power resistivity＞10M Ω .cm, open high-pressure pump, adjustment stroke is 12mm, regulates counterbalance valve then, making pressure is 10MPa, the primary heater temperature is set at 350 ℃, and autoclave temp is set at 300 ℃, starts heater switch, after temperature in the kettle arrives design temperature, stablized 30 minutes, and opened the fatigue machine Control Software on the computer then, the setting control model is displacement, waveform is a triangular wave, and strain rate is 0.001s
-1, the strain amplitude is made as 1.9%, boundary condition be made as when peak stress drop to the maximum stable stress value 75% the time stop the experiment, the cycle index N that it is corresponding
25Be defined as fatigue lifetime.When the circulation cycle reached 4255 cycles, experiment stopped, and Fig. 2 is the stress amplitude (1.9%) and circulation cycle curve of experimental record, and be 4255 cycles fatigue lifetime.
The utility model equipment has moved totally that half a year is many, and it is seven days seven nights that single moves maximum duration continuously, and problems such as seal leakage do not appear in equipment operation safety and stability in the experimentation.This apparatus structure is simple, working service is all more convenient and can satisfy requirement of experiment preferably, to carrying out fatigue behaviour research in the nuclear material High Temperature High Pressure water environment, the military service security, reliability and the economy that improve China's nuclear power station key equipment are significant.
Claims (10)
1. corrosion fatigue test device with High Temperature High Pressure recirculated water, it is characterized in that: this device is provided with High Temperature High Pressure circulation, autoclave, fatigue machine, the High Temperature High Pressure circulation is communicated with autoclave, laboratory sample is arranged in the autoclave, and laboratory sample is connected with the loading section of fatigue machine;
The High Temperature High Pressure circulation comprises water tank (1), ebullator (5), high-pressure pump (7), surge tank (8), heat exchanger (9), primary heater (10), condenser (17), counterbalance valve (19), ion exchange resin (21), the water delivering orifice of water tank (1) connects ebullator (5) by pipeline, and the outlet of ebullator (5) connects and connects a loop and secondary circuit by pipeline respectively; Two-way is divided in one loop after one section pipeline, the first via directly is connected with water tank (1), and the second tunnel pipeline that is connected with water tank (1) is provided with ion exchange resin (21); The pipeline of secondary circuit is provided with high-pressure pump (7), surge tank (8), heat exchanger (9), condenser (17), counterbalance valve (19), the outlet of pipeline insert a loop the second the tunnel on;
The inlet of autoclave (15) connects heat exchanger (9) by pipeline, is provided with primary heater (10) on described pipeline, and the outlet of autoclave (15) connects heat exchanger (9) by pipeline.
2. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: the top of water tank (1) is provided with filling opening and gas outlet, and the gas outlet of water tank (1) is connected with exhaust apparatus (2).
3. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: the bottom of water tank (1) is provided with freeing port, water delivering orifice, oxygen intake, nitrogen inlet, freeing port is connected manual modulation valve respectively with water delivering orifice, and nitrogen inlet is connected nitrogen pot (3) and oxygen tank (4) respectively with oxygen intake.
4. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: the outlet of ebullator (5) connects a cotton filter (6), the outlet of cotton filter (6) is divided into a loop and secondary circuit, one loop is provided with manual modulation valve, water inlet spinner-type flowmeter (22), ohmmeter (23), and secondary circuit is provided with manual modulation valve.
5. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: the second tunnel pipeline that is connected with water tank (1) in a loop is provided with two manual modulation valves, ion exchange resin is connected with bypass on (21), and bypass is provided with manual modulation valve; The outlet of secondary circuit pipeline insert a loop the second the tunnel on pipeline between two manual modulation valves.
6. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: on the pipeline between surge tank (8) and the heat interchanger (9) safety valve is installed.
7. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: security filtrator (18) on the pipeline between counterbalance valve (19) and the condenser (17), the pipeline between the outlet of secondary circuit pipeline and the counterbalance valve (19) is provided with water outlet spinner-type flowmeter (20).
8. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: autoclave (15) is upside down on the fatigue machine saddle (13), high pressure kettle cover (27) is following, autoclave body (28) is last, the upper end of autoclave (15) is fixed on the crossbeam of fatigue machine (16), the lower end of autoclave (15) is connected with water collar device (12), high pressure kettle cover (27) is gone up the water delivering orifice that connects heat interchanger (9) and is connected with water inlet, be connected with stainless-steel tube on the water delivering orifice of autoclave (15) inboard, stretch into autoclave body (28) bottom, the water delivering orifice in autoclave (15) outside is connected with explosive valve.
9. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 8 recirculated water, it is characterized in that: autoclave is established sample clamp in (15), and sample clamp is fixed on autoclave by column and covers; Laboratory sample (14) one ends are fixed on the sample clamp, and the other end connects an end of tensile axis (11), and the other end of tensile axis (11) passes water cooling plant (12) and connects the fatigue machine gearing.
10. according to the corrosion fatigue testing device of the described band High Temperature High Pressure of claim 1 recirculated water, it is characterized in that: also be provided with High Temperature High Pressure recirculated water switch board (24) and fatigue machine switch board (25), High Temperature High Pressure recirculated water switch board (24) connects ebullator (5), high-pressure pump (7), primary heater (10), autoclave (15); Fatigue machine (15) is connected with fatigue machine switch board (25).
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