CN104733061A - Device and method used for carrying out fatigue monitoring and fatigue evaluation - Google Patents
Device and method used for carrying out fatigue monitoring and fatigue evaluation Download PDFInfo
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- CN104733061A CN104733061A CN201510150477.2A CN201510150477A CN104733061A CN 104733061 A CN104733061 A CN 104733061A CN 201510150477 A CN201510150477 A CN 201510150477A CN 104733061 A CN104733061 A CN 104733061A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention relates to a device and a method used for carrying out fatigue monitoring and fatigue evaluation. The device (2) for carrying out the fatigue monitoring and the fatigue evaluation on a part of nuclear power technical equipment comprises at least one set of measurement equipment (4), a data acquisition system (6) and an evaluation unit (34), wherein the measurement equipment (4) is used for acquiring a part temperature measurement value; the data acquisition system (6) is provided with equipment (8) for carrying out cold end compensation, a first processing unit (10) for processing the measurement value, at least one information module (12) connected with the first processing unit (10), and a data server (14); and the evaluation unit (34) is used for executing software for estimating the measurement value. According to the method used for carrying out the fatigue monitoring and the fatigue evaluation through the device (2), a temperature measurement value (VM) of the part of the nuclear power technical equipment is determined; a temperature cycle (ZT) is determined and a fatigue degree (F) of the part is estimated according to the temperature measurement value (VM).
Description
The present invention relates to the apparatus and method for carrying out fatigue monitoring and Fatigue Assessment to the parts of nuclear power technology equipment.
Due to prolongation working time of new equipment or the prolongation in serviceable life of existing equipment, therefore aging the and tired management of nuclear power technology equipment becomes more and more important.In addition, also equipment operating consider fatigue effect flexibly is constantly being required.Because the aging of nuclear power generating equipment and fatigue effect can cause beyond thought problem and therefore can cause equipment downtime, therefore preferably the load occurred when equipment runs is identified, can assess its state.
WO 2014/131499 A1 discloses a kind of method for fatigue monitoring, wherein wants the temperature of measurement component (such as pipeline) outside surface, to determine Temperature Distribution.Employ electromagnet ultrasonic changer in addition, together to determine tension curve together with thermometric result.
EP 2 743 500 A1 describes a kind of equipment carries out fatigue monitoring method to wind turbine, and described equipment has at least one sensor, control module and storage medium.The basis of computation model is analyzed the measurement data detected by means of sensor, can assess the parts monitored.
The method of known a kind of fatigue state for determining means from EP 2 108 112 B1, wherein respectively from Temperature Distribution determination tension force amplitude.
The apparatus and method for carrying out fatigue monitoring and Fatigue Assessment to the parts of nuclear power technology equipment are also illustrated in following publications (non-patent literature):
" FAMOSI-fatigue monitoring system (FAMOSi – Fatigue Monitoring System) " that-AREVA incorporated company delivers for 2013,
" the tired concept (AFC:AREVA Fatigue Concept) of AREVA " that-AREVA incorporated company delivers for 2013,
-Rudolph J., Bergholz S., Heinz B.and Jouan B. (Erlangen, Germany AREVANP incorporated company) is being edited on March 21st, 2012 by Soon Heung doctor Chang, ISBN:978-953-51-0408-7, the publication that publisher InTech publishes: " AREVA tired Gai Nian – power plant parts Fatigue Assessment three-phase approach " (" AREVA FatigueConcept – A Three Stage Approach to the Fatigue As-sessment of Power PlantComponents ") of nuclear power plant 293-317 page is civilian, the access network address on November 12nd, 2014 is http://www.intechopen.com/books/nuclear-power-plants.
Based on prior art, task of the present invention is, proposes the apparatus and method being used for the parts of nuclear power technology equipment being carried out to fatigue monitoring and Fatigue Assessment.
With regard to device, this task is passed through for nuclear power technology part of appliance, and particularly manage, the device carrying out fatigue monitoring and Fatigue Assessment is achieved, and described device has feature according to claim 1.
Described device has: at least one measuring equipment, and it is for the measured temperature of acquisition component; And data acquisition system (DAS), this data acquisition system (DAS) comprises equipment for carrying out cold junction compensation, the first processing unit for the treatment of measured value, information module that at least one is connected with processing unit and data server.In addition described device also has assessment unit, wherein performs the software for assessment of measured value.
Temperature variation can be recorded and classify by processing unit, then calculates the mechanical stress therefrom drawn by analytic equation.Then by rain flow algorithm (Rainflow-Algorithmus), tension force maximal value and minimum value are classified, by these maximal values described and minimum value and the specific load variations figure of material, such as Waller curve (
) compare to determine degree of fatigue.Use device as described in the present invention both can carry out online evaluation to degree of fatigue also can assess it by certain time interval.In addition all data can offline evaluation for carrying out detailed analysis of fatigue.
Measuring equipment is arranged on the position relevant to the fatigue of parts, such as pipe surface (" local fatigue monitoring "), thus makes except operating parameter, also to carry out measuring tempeature by thermopair here.
Information module is used to carry out Signal Regulation and the measured value digitizing that measuring equipment is collected.Measured value reduces and carries out signal analysis by the first treating apparatus, but also provides the communication with data server.
Data server is connected with data acquisition system (DAS) and is such as integrated into the electric cabinet being arranged in nuclear power technology equipment.Data server has database, wherein not only can store measurement values and assessment result thereof, but also can the operational factor of memory device.So just can Long-Time Service measured value and assessment result.Equally also can store the information about measuring equipment and data acquisition unit, such as picture or wiring diagram, thus make always can obtain, such as, about the overview connected up in installation site or measuring equipment.
Assessment unit, such as computing machine, can access data services device database and by performed software, measured value is assessed.Such as can display measurement value and can to whole measuring system in real time, namely measuring equipment and processing unit are configured.Fault in system or the measured value departing from normal range can be revealed.In addition reasonableness test is carried out to assess measured value to described numerical value, thus determine temperature curve and mechanical load and depicted with chart.
In a preferred form of implementation, at least one measuring equipment has the thermopair that at least one is arranged in mark (Messband) upper surface.This thermopair is such as welded on mark.Mark itself is clamped on parts, such as, on pipeline.A kind of simple method of structure comes fastening with tension force pin, even if this can realize pipe diameter, difference also has the short set-up time.In order to ensure the heat trnasfer of the best, require that parts have surface smooth as far as possible at the installed position of thermopair, namely do not have interfering concavo-convex, such as groove.It is wide that mark is about 30mm, and 0.5mm is thick, and and – according to the material-be such as made up of carbon steel or stainless steel of parts that wherein should install and measure equipment.
Thermopair itself only has very thin housing, this advantageously, mark and thermopair described at least one by protective sleeve around to protect it from damage.By spacer bolt, protective sleeve and mark are maintained a certain distance, this also depends on that the material material – of pipeline is such as made up of carbon steel or stainless steel.Protective sleeve is also installed preferably by tension force pin, to shorten the required set-up time and thus to reduce installation personnel and be exposed to risk in radiation.Other fastening possibility is particularly also provided when pipe diameter is larger, such as, tightens.
The slotted line of at least one thermopair is preferably drawn towards the equipment for cold junction compensation in guide groove or in pipeline, wherein guide groove or pipeline have at least one first rigid element and second flexible portion.Equipment for carrying out cold junction compensation has joint-box especially.In this case, described part is by suitable connector, and such as, connector by being made up of anodised aluminium is connected with each other.First rigid element, such as, to be soldered on protective sleeve with hollow tube form and to be guided the slotted line of thermopair by isolated part or pipeline.First rigid element is generally made up of stainless steel.If the slotted line of thermopair has the part of multiple different length, it is connected to each other by plug connection, then within plug connection is positioned at the second flexible portion.Part II preferably by elastic metallic, such as anodised aluminium, or galvanized steel is made.This advantage had is, it is easy to just slotted line or thermopair to be separated or to connect to carry out building or maintenance job, and mode is retraction second flexible portion thus makes plug connection outside exposed.Second flexible portion is such as connected with cable duct again, and this cable duct guides slotted line into cold junction compensation.Therefore, measuring equipment can be arranged on diverse location, because slotted line can be guided neatly in a different direction, but can be protected in guide groove.
In the joint-box of cold junction compensation by multiple particularly each other the slotted line of the thermopair of arranged adjacent be bundled into main push-towing rope.The slotted line of thermopair is made up of nickel chromium triangle/nickel and main push-towing rope is made up of copper, then the compensation of the temperature signal produced during changes in material is realized by resistance thermometer, and described resistance thermometer is such as arranged in by silver or the isothermal block that forms of copper.The temperature signal collected like this is summed into the signal of corresponding thermopair, so that the absolute temperature of determining means.
In order to the chain tape from joint-box to cold junction compensation can be checked, be provided with the separate terminal for separating of the slotted line of thermopair and the plug being connected Auto-Test System, single Measurement channel can be tested successively.After test macro is connected, then independently also can carry out described test to Long-distance Control, thus make also to protect when radiation value is larger staff can not expose under the radiation.
Such as by cable thread joint, slotted line is caused such as by the joint-box that stainless steel is formed.This joint-box prevents from entering dust and water and ground connection.In addition, this joint-box also have communicator for data acquisition unit, other component communication of such as information module and processing unit.Joint-box for cold junction compensation can be installed in safety container under the maximum temperature of 80 DEG C.It also has pressure-compensated valve, even if thus make it still can be positioned at safety container when containment carries out pressure test.
In one preferred embodiment, measuring equipment has the seal mated with parts surface.The usual heat insulating part around parts to be removed and replace with suitable seal for this reason.This seal has groove, wherein arranges a part of rigid element of thermopair and protective sleeve and guide groove.The thermopair that directly can contact with pipeline can be installed thus.Easily seal can be removed rapidly in addition when measuring equipment must be keeped in repair or change to appearance.
If not by carrying out alternative insulator with the seal of parts match or correspondingly mating with insulator, then likely measuring equipment is directly installed on the below of existing insulator.Use the silver foil wrapping thermopair in this case, result causes the numerical value of response time higher, thus produces higher precision.Protective sleeve can be used here equally.
At least one information module has at least one analog/digital converter and/or for the traffic filter that the signal measured by thermopair carried out to noise reduction process and/or for the communication interface that communicates between analog/digital converter with the first processing unit and/or data-storage system.Therefore this information module comprises electronic equipment needed for whole Signal Regulation and digitizing and protection system, and the purposes of described protection system is storing data to during the disconnecting of the first processing unit.It is connected with measuring equipment or for the joint-box of cold junction compensation on the one hand, is such as connected to the first processing unit by Ethernet on the other hand.
In a preferred form of implementation, the first processing unit has data-carrier store and/or assessment unit (wherein performing the software for assessment of measured value) and/or communication interface and/or display device.First processing unit causes the data of measured value to reduce and stores the measured value after reducing.In addition real-time assessment is carried out to measured value, namely operationally online evaluation and show about unit status information or such as send alarm to equipment personnel by Email.Such as also can give all websites be connected with the first processing unit via network by transmitting measured values in real time by UDP (" User Datagram Protoco (UDP) ").First processing unit was both connected with information module (wherein such as carrying out data transmission by optical fiber or cable), was also connected with data and Analysis server.First processing unit is equipped with additional power supply, to be that itself and information module are powered.In addition the first processing unit also has warning system, such as to carry out display system fault with the warning light glimmered in pulpit.
Information module and the first processing unit are all disposed in that radiation dose is lower and maximum temperature is no more than in the containment of 60 DEG C of positions, is preferably jointly arranged in the capsule that is easy to operate.If exceed maximum temperature, then can oneself alert trigger and make information module and processing unit composition system closing.
In another preferred form of implementation, described device has the second processing unit for gathering and assess the signal (" overall fatigue monitoring ") of the operational factor representing nuclear power technology equipment.Operational factor or signal (such as pressure measuring value, fluid temperature (F.T.) or valve location) are learned according to the process control technology of equipment, analyze and minimizing data after store in the lump together with the measured value of measuring equipment record.Thus the relation between operational factor and the thermal stress of parts can be determined.Second processing unit is disposed in outside containment.
With regard to method, this task by have feature described in claim 9, be achieved for the method for nuclear power technology part of appliance being carried out to fatigue monitoring and Fatigue Assessment.
Method for carrying out fatigue monitoring and Fatigue Assessment to the parts of nuclear power technology equipment relates generally to and uses the said equipment by regulation, thus makes the form of implementation first mentioning this respect.
In the method for carrying out fatigue monitoring and Fatigue Assessment, the measured temperature of the parts of definite kernel power technology equipment, determining temperature cycles according to this measured temperature and carrying out the degree of fatigue of evaluation means according to temperature cycles.
Therefore first step is exactly, and reads in and to obtain by means of the first measuring equipment and the measured temperature crossed in the first processing unit for processing and such as from the pressure measuring value of the second processing unit, and determine temperature cycles in assessment unit.Second step assesses fatigue state exactly, wherein determines that mechanical stress is to assess it especially.
Temperature and pressure circulation is reduced to turning point, and the time series namely by replacing extreme value substitutes measured value curve, and the time series of described alternately extreme value is by the sluggish counting method of rain stream or analyze by rain flow algorithm.In this case its mainly less fluctuation can identify that temperature and pressure circulates, even if also can realize.Closed circulation is recorded in described class transition matrix (Klassen ü bergangsmatrix), and mode is that two extreme values forming circulation belong to a value class (Werteklasse).Last shown in class transition matrix, the frequency of another value class that fluctuates from a value class at each measured value of viewing duration.
The remaining extreme value can not inferring circulation, it is stored in so-called surplus value sequence, can infer when accumulating other measured value the circulation made new advances.Conservatively say, do not consider when rapid evaluation the same vital temperature changing speed of fatigue, because piston flow is estimated to have desirable thermal shock process when namely assessing circulation, namely the temperature variation time is 0 second.
Determined temperature cycles is the starting point of carrying out stress and Fatigue Assessment, and this assessment is undertaken by known analytic equation.Also there will be thermal stress in addition, it can cause mechanical stress again, described thermal stress causes due to thermal stratification (namely different in parts temperature) or due to thermal shock (i.e. cataclysm fast in material or parts), and these thermal stress must be paid attention to when Fatigue Assessment.Thermal stratification particularly can cause tension force to raise at parts sections that is bending or archwise, and thermal shock mainly occurs in welded seam area.
At this moment determine mechanical stress or load and these parameters be multiplied by the factor of stress concentration (Spannungskonzentrationsfaktor) relevant with the geometric configuration of assembly (such as with pipe bend or weld seam) to be multiplied according to the temperature difference occurred, elastic modulus and thermal expansivity.These factor of stress concentration are known and such as can learn from KTA code.Also the impact that possible plastic yield produces is taken into account by being multiplied by coefficient known equally.
Based on the mechanical stress obtained thus and its frequency occurred, be respectively the tired utilization factor of the parts of thermal stratification and thermal shock determination CYCLIC LOADING, then by total for its worthwhile one-tenth tired utilization factor, carry out evaluation means whether fatiguability according to this total tired utilization factor.Tired utilization factor can be understood as that the ratio of the circulation of circulation and the permission occurred.At this moment the circulation allowed draws according to the specific Waller curve of material, and described Waller curve illustrates the relation described between mechanical stress and (can cause losing efficacy) period with double-log.
The stress caused by thermal stratification mainly axial stress, and tangential stress and radial stress are very little negligible.Being calculated as follows of these stress:
Δσ
v＝Δσ
axial＝f
SN·f
KR·0，92·E
T·α
T·ΔT
Wherein f
sNfor the factor of stress concentration relevant with weld seam, f
kRfor the factor of stress concentration relevant with component flexes degree, E
tfor elastic modulus, α
tfor thermal expansivity, Δ T is the temperature difference in the temperature cycles caused by thermal stratification.Taken into account by the impact of coefficient 0.92 by fusion zone.
Can from described stress determination alterante stress curve S
a
Wherein E
kATfor the elastic modulus of the curve of fatigue according to KTA code, E
tfor determined elastic modulus, and K
efor considering the coefficient of plastic yield.
Can therefrom determine that the load allowed changes n by the corresponding curve of fatigue now
iZulthe period n drawn thus
iSchichtand the tired utilization factor of the part of thermal stratification aspect:
The stress that thermal shock produces is relevant with axial stress and tangential stress:
Wherein f
sNfor the factor of stress concentration relevant with weld seam, f
kRfor the factor of stress concentration relevant with the degree of crook of parts, E
tfor elastic modulus, α
tfor thermal expansivity, Δ T is temperature difference and v is Poisson ratio.By coefficient 2, the sign modification when temperature alternating stress changes rapidly is taken into account.
In addition, can according to stress determination alterante stress curve S
a, wherein K in this case
e=1, the tired utilization factor of the part of thermal shock aspect can also be determined:
Wherein E
kTAfor the elastic modulus of the curve of fatigue according to KTA code, E
tfor determined elastic modulus, n
iZulfor the load allowed changes and n
iSchockfor the period drawn thus.
Then therefrom determine total tired utilization factor, evaluation means can be carried out by it and whether be easy to tired.
D
Schnell＝ΣD
i＝D
Schicht+D
Schock
Advantageously operational measured value and determined tired utilization factor are also used for the trend of the degree of fatigue curve of determining means.Come thus to identify in advance with given stress or with run the possible deviation of desired stress from now on for equipment and it analyzed.
In a kind of preferred implementing form of described method, environmental impact will be considered when assessing the fatigue state of parts, to obtain more detailed analysis of fatigue.This point be such as by automated method based on simplify elastoplasticity analysis of fatigue (rapid fatigue assessment) or carry out based on heat load information (detailed Fatigue Assessment).
Also can be described other features and advantages of the present invention by embodiment and with reference to accompanying drawing below.Illustrate with diagrammatic view in principle respectively:
Fig. 1 shows the device for carrying out fatigue monitoring and Fatigue Assessment to the parts of nuclear power technology equipment,
Fig. 2 shows the thermopair of measuring equipment,
Fig. 3 a, b show the thermopair of the upper surface being arranged in mark,
Fig. 4 shows measuring equipment with exploded view,
Fig. 5 shows the parts with the device be arranged in insulator,
Fig. 6 shows and is arranged in information module in common housing and processing unit,
Fig. 7 shows the process flow diagram of the method for implementing fatigue monitoring and Fatigue Assessment parts.
Fig. 1 shows for parts, and particularly the pipeline 72 of nuclear power technology equipment carries out the device 2 of fatigue monitoring and Fatigue Assessment, and it has two measuring equipments 4 for collection tube channel temp measured value and data acquisition system (DAS) 6.Data acquisition system (DAS) 6 has the equipment 8 for carrying out cold junction compensation, for the treatment of the first processing unit 10 and two information modules 12 be connected with the first processing unit 10 of measured value, and data server 14.Wherein information module 12 and the first processing unit 10 are all arranged in common housing.In addition, device 2 also has the second processing unit 16, and it represents the signal of operational factor for gathering.
First processing unit 10 has data-carrier store 54, assessment unit 56, communication interface 58 and display device 60 respectively.Information module 12 has analog/digital converter 46, traffic filter 48, communication interface 50 and data-storage system 52.For the sake of clarity, Fig. 1 only depicts the first processing unit 10 and information module 12.
In addition, described device 2 has assessment unit 34, wherein performs the software for assessment of measured value.In addition the second processing unit 16 is also had for gathering the signal that represents operational factor or for gatherer process parameter.Measuring equipment 4 has multiple thermopair 18 respectively, and the temperature of its acquisition component is as measured value.
Fig. 2 shows the thermopair 18 of measuring equipment 4, such as nickel chromium triangle/nickel (K type) thermopair pair, and it has corresponding slotted line 20a.Within thermopair 18 or slotted line 20a are positioned partially at shell 22 (it is such as made up of fire-retardant corrosion-free material (FRNC)), and be separated from each other by insulator (it is such as made up of polyetheretherketonematerials materials (PEEK)).Installed socket 26 respectively in the end of slotted line 20a, it is compatible with plug 28 respectively, and described plug is arranged on the free end of the slotted line 20b leading to cold junction compensation.Slotted line 20a, 20b are shielded by bell housing 24 made of copper.
Fig. 3 a, b show two kinds of forms of implementation of measuring equipment 4, and wherein in the first form of implementation, (Fig. 3 a) has two thermopairs 18 and (Fig. 3 b) has seven thermopairs 18 to be arranged in the upper surface 30 of mark 32 in the second form of implementation.Thermopair 18 is welded on mark 32, and this mark 32 self is clamped on parts or pipeline 72.The thermopair more than 18 that mark 32 is arranged, the temperature curve of parts or pipeline 72 just can be determined more exactly.
Fig. 4 shows the exploded view of measuring equipment 4.Mark 32 has opening 70, and it is convenient to mark 32 to be placed on pipeline 72.Then tension force pin 66 is used to be fastened on pipeline 72 by mark 32.Because thermopair 18 itself only has thin shell 22, therefore also wrapped up with protective sleeve 36 in addition.Protective sleeve has upper lower half shell, and it is positioned at around mark 32 or thermopair 18, and one side is with by hinge 64, another side also uses tension force pin 66 to be connected.In order to make thermopair 18 itself damage by protected cover 36 applied pressures, by means of distance retainer 62, protective sleeve 36 and pipeline 72 are arranged with interval.
By from thermopair 18 to being used for the equipment 8 of cold junction compensation or being conducted through guide groove 38 to slotted line 20a, 20b of reference end.Guide groove 38 has two rigid elements 40 and a flexible portion 42.Described part 40,42 is connected to each other via connector 68 respectively.Be made up of stainless steel and have the Part I 40 of the rigidity of the shape of hollow tube, it is soldered to the insulated part 44 being guided through parts or pipeline 74 on protective sleeve 36 and by the slotted line 20a of thermopair 18.The plug connection be made up of socket 26 and the plug 28 of thermopair 18 slotted line 20a, 20b is positioned at the Part II 42 be made up of elastic metallic.So just easily can connect or separate slotted line 20a, 20b to install or to keep in repair, mode is flexible Part II 42 of retracting, and plug connection is exposed.Flexible Part II 42 is connected with the part 40 (such as cable duct) of another rigidity via connector 68 again, and this part guides slotted line 20a, 20b into cold junction compensation 8.
Figure 5 illustrates device 2, wherein measuring equipment 4 has seal 44 or is arranged in the insulator of pipeline 72.The surface matching of seal 44 and pipeline 72.By the usual heat guard around pipeline 72 from measuring equipment 4 comparatively after about 250mm length place, measuring position to be removed by both sides and to substitute with the seal 44 matched.The distance of measuring position and weld seam 76 is A.Seal 44 has groove 74, is wherein furnished with a part of rigid element 40 of thermopair 18 and protective sleeve 36 and guide groove 38.For this reason, described groove 74 has the width B being about 80mm extended on pipeline 72 direction
1, measuring equipment 4 has the width B being about 60mm
2.The rigid element 40 of guide groove 38 is conducted through a part for groove 74, and therefore the slotted line 20a of thermopair 18 is also conducted through a part for described groove 74, and the diameter D of a part for this groove is about 30mm.
Thermopair 18 or measuring equipment 4 can be mounted to directly to contact with pipeline 72 by seal 44.In addition, if there is when must keep in repair or change measuring equipment 4 this situation, seal 44 can also be removed easily and fast.
Fig. 6 shows and is arranged in information module 12 in common housing 78 and processing unit 10.Multiple passages 82 that the input signal that first processing unit 10 has the measured value recorded for thermopair 18 provides.In addition, also houses in housing 78 for the blower fan 80 of cooling processing unit 10, power supply unit 84, assessment unit 56 and communication interface 58.
Also can implement to monitor method that is tired and Fatigue Assessment for carrying out by said apparatus, described method can describe by the process flow diagram described by Fig. 7 tout court.First step is exactly carry out the measured temperature V of acquisition component or pipeline 72 with measuring equipment 4 or thermopair 18
m.
According to measured temperature V
m, in the first processing unit 10, determine temperature cycles Z
tthe temperature difference Δ T occurred in temperature cycles respectively.In addition, the operational factor such as gathered by means of the second processing unit 16 is to determine pressure cycling and to analyze respectively by rain flow algorithm.
According to circulation Z
tthe temperature difference Δ T of interior appearance determines mechanical stress σ, and this mechanical stress is caused by thermal stratification and/or thermal shock.In addition measured stress σ is utilized to carry out the tired utilization factor D of calculating unit.Then according to the degree of fatigue F of its evaluation means, namely whether evaluation means is easy to tired.For this reason, also by measured temperature extrapolation being carried out the trend of determining means degree of fatigue F curve.In order to obtain more accurate parts fatigue state F assessment result, environmental factor will be considered especially.
List of reference signs
2 devices
4 measuring equipments
6 data acquisition system (DAS)s
8 for the equipment of cold junction compensation
10 first processing units
12 information modules
14 data servers
16 second processing units
18 thermopairs
20a, b slotted line
22 shells
24 bell housings
26 sockets
28 plugs
30 upper surfaces
32 marks
34 assessment units
36 protective sleeves
38 guide grooves
The Part I of 40 rigidity
The Part II of 42 flexibilities
44 seals
46 analog/digital converters
48 traffic filters
50 communication interfaces
52 data-storage systems
54 data-carrier stores
56 assessment units
58 communication interfaces
60 display device
62 distance retainers
64 hinges
66 tension force pins
68 connectors
70 openings
72 pipelines
74 grooves
76 weld seams
A spacing
D diameter
B
1groove is wide
B
2the width of measuring equipment
V
mmeasured temperature
Δ T temperature difference
Z
ttemperature cycles
σ mechanical stress
The tired utilization factor of D
F degree of fatigue/state
Claims (13)
1. one kind for carrying out the device (2) of fatigue monitoring and Fatigue Assessment to the parts of nuclear power technology equipment, and described device (2) has: at least one measuring equipment (4), and it is for gathering the measured temperature of described parts; Data acquisition system (DAS) (6), it has equipment (8), the first processing unit (10) for the treatment of described measured value, at least one information module (12) be connected with described first processing unit (10) and data server (14) for carrying out cold junction compensation; And assessment unit (34), wherein performs the software for assessment of described measured value.
2. device (2) as claimed in claim 1, wherein said at least one measuring equipment (4) has at least one thermopair (18) of the upper surface (30) being arranged in mark (32).
3. device (2) as claimed in claim 2, wherein said mark (32) and at least one thermopair described (18) by protective sleeve (36) around.
4. as device in any one of the preceding claims wherein (2), at the slotted line of at least one thermopair (18) described in described device (2), (20a, b) in guide groove (38), be drawn towards equipment (8) for carrying out cold junction compensation, wherein said guide groove (38) has the Part I (40) of at least one rigidity and a flexible Part II (42).
5., as device in any one of the preceding claims wherein (2), wherein said measuring equipment (4) has and the seal of the form fit of described parts (44).
6., as device in any one of the preceding claims wherein (2), wherein said at least one information module (12) has at least one analog/digital converter (46) and/or traffic filter (48) and/or communication interface (50) and/or data-storage system (52).
7., as device in any one of the preceding claims wherein (2), wherein said first processing unit (10) has data-carrier store (54) and/or assessment unit (56) and/or communication interface (58) and/or display device (60).
8., as device in any one of the preceding claims wherein (2), described device (2) has the second processing unit (16) for gathering the signal representing operational factor.
9. the method by using device in any one of the preceding claims wherein to carry out fatigue monitoring and Fatigue Assessment, the wherein measured temperature (V of the parts of definite kernel power technology equipment
m), according to described measured temperature (V
m) determine temperature cycles (Z
t) and assess the degree of fatigue (F) of described parts.
10. method as claimed in claim 9, the degree of fatigue (F) wherein in order to assess described parts will be determined mechanical stress (σ) and therefrom determine the tired utilization factor (D) of described parts.
11. methods according to any one of claim 9 or 10, wherein analyze described temperature cycles (Z by means of rain flow algorithm
t) and/or pressure cycling.
12. methods according to any one of claim 9 to 11, wherein determine the trend of degree of fatigue (F) curve of described parts.
13. methods according to any one of claim 9 to 12, wherein will consider environmental factor when assessing fatigue state (F) of described parts.
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| CN201510150477.2A Pending CN104733061A (en) | 2015-04-01 | 2015-04-01 | Device and method used for carrying out fatigue monitoring and fatigue evaluation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448359A (en) * | 2015-12-07 | 2016-03-30 | 中广核工程有限公司 | System and method for monitoring fatigue of nuclear power plant |
| GB2548951A (en) * | 2016-03-31 | 2017-10-04 | China Nuclear Power Eng Co Ltd | Temperature measuring device for outer wall surface of pipelines of a nuclear power plant |
| CN109828548A (en) * | 2019-01-17 | 2019-05-31 | 西安交通大学 | Performance degradation feature evaluation method based on time series variation Singularity detection |
| CN109979622A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | Nuclear power plant's voltage-stablizer fatigue life monitors assessment system and method on-line |
| CN114777368A (en) * | 2022-04-08 | 2022-07-22 | 青岛海尔空调器有限总公司 | Method and device for monitoring risk of circulation system pipeline and circulation system |
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2015
- 2015-04-01 CN CN201510150477.2A patent/CN104733061A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448359A (en) * | 2015-12-07 | 2016-03-30 | 中广核工程有限公司 | System and method for monitoring fatigue of nuclear power plant |
| CN105448359B (en) * | 2015-12-07 | 2017-09-01 | 中广核工程有限公司 | A kind of nuclear power plant's fatigue monitoring system and method |
| GB2548951A (en) * | 2016-03-31 | 2017-10-04 | China Nuclear Power Eng Co Ltd | Temperature measuring device for outer wall surface of pipelines of a nuclear power plant |
| GB2548951B (en) * | 2016-03-31 | 2020-12-16 | China Nuclear Power Eng Co Ltd | Temperature measuring device for outer wall surface of pipelines of a nuclear power plant |
| CN109979622A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | Nuclear power plant's voltage-stablizer fatigue life monitors assessment system and method on-line |
| CN109979622B (en) * | 2017-12-27 | 2021-02-09 | 核动力运行研究所 | Nuclear power plant voltage stabilizer fatigue life online monitoring and evaluating system and method |
| CN109828548A (en) * | 2019-01-17 | 2019-05-31 | 西安交通大学 | Performance degradation feature evaluation method based on time series variation Singularity detection |
| CN109828548B (en) * | 2019-01-17 | 2020-03-17 | 西安交通大学 | Performance degradation characteristic evaluation method based on time series change mutation point detection |
| CN114777368A (en) * | 2022-04-08 | 2022-07-22 | 青岛海尔空调器有限总公司 | Method and device for monitoring risk of circulation system pipeline and circulation system |
| CN114777368B (en) * | 2022-04-08 | 2024-06-18 | 青岛海尔空调器有限总公司 | Method and device for monitoring pipeline risk of circulating system and circulating system |
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Application publication date: 20150624 |