CN106932431A - A kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube and method - Google Patents
A kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube and method Download PDFInfo
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- CN106932431A CN106932431A CN201511004676.9A CN201511004676A CN106932431A CN 106932431 A CN106932431 A CN 106932431A CN 201511004676 A CN201511004676 A CN 201511004676A CN 106932431 A CN106932431 A CN 106932431A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2846—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for tubes
Abstract
A kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube and method, are used to realize the online heat waste test of slot type high-temperature vacuum heat-collecting tube, and system includes：Samming heating system, heating control system, extract system and leak detection system, data acquisition and upper computer control system.Online heat waste method of testing is comprised the following steps：A) test station installs samming heating system and wiring on thermal-collecting tube general assembly line, connects heating control system；B) vacuum in vacuum line is maintained using the vacuum pump group of extract system and leak detection system；C) target temperature, and the heat waste tested under thermal-collecting tube target temperature are heated to；D) stop heating after having tested, the connection between thermal-collecting tube and vacuum leak detecting system is disconnected after cooling, remove samming heating system.The features such as system and method have easy, easy to operate, and can be with single thermal-collecting tube performance on rapid feedback production line.
Description
Technical field
The invention belongs to solar energy thermal-power-generating core devices-thermal-collecting tube online test method field, specifically relate to
And the online heat waste test system and method for a kind of slot type high-temperature vacuum heat-collecting tube.
Background technology
Solar energy thermal-power-generating technology occupies critical role in new energy application field, wherein using slot type heat
Generating electricity, some areas have the applicating history for exceeding 20 years abroad.Tank-type thermal power generation technology is to utilize groove
Formula condenser converges sunshine, and thermal-collecting tube is by the heat collection of convergence and passes to thermal-arrest Bottomhole pressure
Hot working fluid (purposes and type according to thermal-collecting tube are divided into conduction oil, fused salt and vapor etc.), heating
Hot working fluid and cryogenic fluid afterwards is exchanged heat and then by a series of forces electrical power generators.
China is not long into the warm power field time high, in tank-type thermal power generation nucleus equipment (such as in recent years
High-temperature vacuum heat-collecting tube, speculum and heat reservoir etc.) manufacture and application field obtain compared with F.F.
Exhibition.And due to market bright prospects for thermal-collecting tube research and development, improvement propose requirements at the higher level,
Accordingly also in the urgent need to quick, the easy detection method and device that are produced suitable for batch thermal-collecting tube.
In thermal-collecting tube technical process is manufactured, it is that mass is completed that coating is coated with, in strict work
Under skill control, its performance and uniformity can preferably be ensured.It is welding general assembly that leak rate is determined
The major criterion that procedure quality is evaluated, thus, welding leak rate is also simultaneously that the key of thermal-collecting tube performance refers to
One of mark.Heat collecting pipe heat waste is the core index of evaluate collection properties of hot pipe, its numerical values recited concentrated expression
The quality of level of vacuum in coated optical performance, pipe.In process of production, with reference to vacuum controlled
Online heat waste detection can give in production process the implementation of important process and coordinate (plated film and general assembly,
Welding) with direct feedback.The inspection GB 17049-2005 of all-glass vacuum thermal-collecting tube utilizes electric spark
Leak detection, due to vacuum in the material and pipe of high-temperature heat-collection pipe, and for thermal-collecting tube uniformity and
The requirement of accuracy, this kind of method is no longer applicable.
The content of the invention
The main object of the present invention is to provide a kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube
System, it can be used the online heat waste in batch thermal-collecting tube to test.
To achieve the above object, the present invention takes following design：
A kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube, by extract system and leak detection system,
Samming heating system, heating control system, data collecting system and upper computer control system composition, institute
The samming heating system stated is used to be heated for measured tube；Electric power is included in described heating control system
Transmitter, temperature controller and logging, implement control and supervise for the heated condition to samming heating system
Survey；Described data collecting system is used to gather measured parameter and export to upper computer control system with reality
The automatic storage (in case analysis) of existing data；
Described samming heating system is arranged on the on-line testing station of thermal-collecting tube general assembly line, is included
One heater, the heater is made up of heating rod and samming copper pipe, the heater (heating rod and
Warm copper pipe) two terminations be covered with adiabatic termination respectively and be seated a pair of leak detections by the adiabatic termination
On support；
A vacuum pump group, vacuum line and flapper valve are included in described extract system；
Two-way is included in described leak detection system：It is all the way leak detector unit, another road is composite evacuated
Meter unit, the intake line of each unit is on vacuum line, and each vacuum line and carries flapper valve；
Described extract system realizes set with leak detection system by a pipeline connecting parts；KF interfaces are stainless
The flange valve of steel four-way connector is used for as extract system and the shared input interface of leak detection system
Connected with thermal-collecting tube exhaust tail mouth to be measured；Other three interfaces of KF interface stainless steel four-way connectors：
Achieved a butt joint with vacuum pump group, leak detector by vacuum line respectively, by vacuum line (bellows),
Ionization gauge and Pirani gauge are connected to compound vacuum gauge；And it is provided with flapper valve in each vacuum line.
In the online heat waste test system of slot type high-temperature vacuum heat-collecting tube, described leak detector uses He
Mass-spectrometer leak detector；Described pipeline connecting parts use KF interface stainless steel four-way connectors.
In the online heat waste test system of slot type high-temperature vacuum heat-collecting tube, the KF interfaces stainless steel four
Lead to the connecting air faucet and vacuum pump group of fitting with respect to 180 degree setting, He mass-spectrometer leak detectors and vacuum gauge
Set with respect to 180 degree.Such design, opening sequence is different when can cause operation, can maximum limit
Degree reduces pipeline flow resistance, fastest to up to vacuum License Status.
In the online heat waste test system of slot type high-temperature vacuum heat-collecting tube, one rubber hose of arranging (as
Intermediate duct), by the flange valve of KF interface stainless steel four-way connectors when being tested for online heat waste
Connected with thermal-collecting tube exhaust tail mouth to be measured；A KF plugs are arranged, for sealing KF interface stainless steels
The flange valve of four-way connector, with realize each junction and weld seam before the test of system online heat waste from
Inspection.
It is a further object of the present invention to provide a kind of online heat waste test side of slot type high-temperature vacuum heat-collecting tube
Method, it can quickly and easy detection, to aid in realizing thermal-collecting tube in producing in batches for product matter
The detection of amount judges.
To achieve the above object, the present invention takes following design：
A kind of online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube, with above-mentioned system, specific side
Method step is as follows：
A) thermal-collecting tube for completing will be welded and removes welding post, be installed on on-line testing station, made
The samming copper pipe of warm heating system is located in thermal-collecting tube, and the adiabatic termination at two ends seals the both sides of thermal-collecting tube
Port；
B) thermal-collecting tube exhaust tail mouth to be measured is made with described extract system and inspection by an intermediate duct
The input port connection of leakage system；
C) start extract system and leak detection system, each vacuum tube is maintained using the vacuum pump group of extract system
Vacuum in road, realizes that vacuum line leak detection and the vacuum of system are monitored using leak detection system；
D) start samming heating system and heating control system, be heated to target temperature；
E) by the temperature controller and logging detection temperature stability and vacuum stability of heating control system, obtain
The temperature parameter of temperature controller and logging is taken, and is recorded by configuration software, such as temperature stability and vacuum
Stability reaches test request carries out next step heat waste test；
F) record electricity monitor obtain parameters of electric power data, at least including active power, each phase current,
Voltage, power factor and cumulative power supplemental characteristic；
G) temperature parameter and parameters of electric power validity of the temperature controller of analysis record and logging, are such as good as
Often (heating-up temperature is abnormal, uniform sexual abnormality and electrical parameter exception) then convert real-time heat waste parameter,
Wherein, heat waste conversion principle is：The general power of heat waste numerical value=heater unit interval supplement；If any different
Reason condition illustrates heater or thermal-collecting tube has problem, the abnormal then problem exists in heating of electrical parameter in itself
Device, the abnormal then problem of temperature parameter is appeared on thermal-collecting tube.
H) it is completed, stops heating, thermal-collecting tube and extract system and leak detection system is disconnected after cooling
Connection, removes samming heating system, and measured tube is transferred into subsequent processing.
In the step d, the scope of described target temperature definition is：According to thermal-collecting tube producer product
Range of application, this temperature range is located at 200-400 DEG C.
In the online heat waste method of testing of described slot type high-temperature vacuum heat-collecting tube, the temperature and parameters of electric power
Record all should meet the stable reading of limit, i.e. compound vacuum gauge, range of drift is in 1E-2~
1E-1Pa, and temperature parameter data stabilization in 15 minutes, heter temperature range of drift<2 is Celsius
Degree.
In the online heat waste method of testing of described slot type high-temperature vacuum heat-collecting tube, in the step C, test
When, according to the limit leak rate of leak detector as examination criteria；The pressure readings that compound vacuum gauge is given are small
In 100The Pa orders of magnitude.If vacuum levels itself is bad, outer glass bulb temperature is excessively high when can cause test asks
Topic, and heat waste numerical value can be influenceed to cause tester to judge by accident.General pressure is higher, causes heat waste bigger.
When pressure is too high, vacuum is not up to standard in itself for system, and thermal-collecting tube is easily caused during heating, and glass bulb temperature is too high outward,
And it is in itself thermal-collecting tube quality problems that vacuum is not up to standard.
In the online heat waste method of testing of described slot type high-temperature vacuum heat-collecting tube, according to the fitting of electric power data
Result and temperature data distribution judge whether heat collecting pipe heat waste numerical value is reasonable：Record thermal-collecting tube outer glass tube
Temperature, draws change curve of the outer glass tube temperature with test temperature, and thermal-collecting tube heat is judged using this curve
Whether reasonable damage numerical value.The varying with temperature for heat waste numerical value of normal thermal-collecting tube defers to T~4 relation, outward
Glass-tube temperature and test temperature also have similarity relation, as deviation is excessive, need vigilant heat waste numerical value also can
Deviation is excessive.
In the online heat waste method of testing of described slot type high-temperature vacuum heat-collecting tube, if matched curve and actual survey
Examination curve matching reaches satisfaction, then heat collecting pipe heat waste numerical value is judged rationally, conversely, then judging thermal-arrest
Pipe heat waste numerical value is unreasonable, that is, represent vacuum uniformity and temperature homogeneity all it cannot be guaranteed that, then need
Want the proper extension testing time.
The present invention can be different from the DCO detailed checkout in the laboratory of thermal-collecting tube finished product, and on-line checking can be real
Referring now to the quick, easy of thermal-collecting tube performance and get information about.
It is an advantage of the invention that：
1) present system can realize producing in batches quick, the easy detection of thermal-collecting tube；It is easy to operate
Fast, the data of acquisition are accurate, and thermal-collecting tube can be coordinated to realize on-line checking after welding, thus save with
Past intermediate link (the transfer of product to be measured：Sensing chamber's detection need to one by one be sent into), therefore can save significantly
Human-saving, material resources and time；
2) being detected in heat waste can quickly realize homogeneous tube welding leak detection simultaneously, greatly shorten detection time,
System reliability, leak rate vacuum fluctuation is small；
3) system and method for the present invention need quickly to grasp thermal-collecting tube performance suitable for volume manufacturing process
And the purposes of bulk article uniformity.
Brief description of the drawings
Fig. 1 is the online heat waste test system principle of compositionality schematic diagram of slot type high-temperature vacuum heat-collecting tube of the present invention.
Fig. 2 is extract system of the present invention and leak detection system structural representation.
Fig. 3 is present system control logic circuit schematic diagram.
Fig. 4 is the online heat waste test system and test flow chart of the present invention.
Fig. 5 is slot type high-temperature vacuum heat-collecting tube extract system of the present invention and leak detection system data statistics.
Fig. 6 is the once online heat waste test result of the present invention.
In figure：1- rubber hose；2-KF interface stainless steel four-way connectors；3- vacuum lines；4- baffle plates
Valve；5- leak detectors；6- vacuum pump groups；7- compound vacuum gauges；8- ionization gauges；9- Pirani gauges；10- is tested
Thermal-collecting tube；11- thermal insulation termination；12- samming copper pipes；13- supports；14- exhaust tail mouths.
Below in conjunction with the accompanying drawings and specific embodiment is described in further details to the present invention.
Specific embodiment
Refering to shown in Fig. 1, the online heat waste test system of slot type high-temperature vacuum heat-collecting tube of the present invention mainly includes
Extract system, leak detection system, samming heating system, heating control system, data collecting system and on
Position machine control system.
Described samming heating system (referring to the dotted box portion in Fig. 1) is used to be measured tube 10
Heating, heater is constituted in the present embodiment by heating rod and samming copper pipe.
Described heating control system includes power transducer, temperature controller and logging, is protected with electric leakage
Breaker, controllable silicon, lead of shield etc., can be independently arranged, in rack form for being heated to samming
The heated condition of system implements control, and shown in Figure 3, its operation principle and process can be existing
Technology is realized, not repeated herein.
Described data collecting system is used to gather measured parameter and export to upper computer control system, and it is also
For prior art can be realized, do not repeat herein.
Described samming heating system be arranged on thermal-collecting tube (working media in thermal-collecting tube for 400 DEG C with
Conduction oil, vapor of lower temperature range etc.) general assembly line on-line testing station on, include one
Samming copper pipe 12, two terminations of the samming copper pipe are covered with adiabatic termination 11 and by the adiabatic end respectively
Head is seated on a pair of leak detection supports 13.
A vacuum pump group 6 (containing more than one vavuum pump), true is included in described extract system
Blank pipe road 3 and flapper valve 4.Cascade can be constituted using one or more mechanical pump according to actual needs
Vacuum pump group, this is depending on pipe physical dimension (vacuum chamber volume), mechanical pump pumping speed and to surveying
(testing time is shorter to require that mechanical pump pumping speed is bigger, if production line is for online survey for the requirement of examination time
Examination time requirement is harsh to be can contemplate using multiple pump groups into pump group).
Two-way is included in described leak detection system：It is all the way the unit for being provided with leak detector, another road is
The unit of compound vacuum gauge is provided with, vacuum line 3 and flapper valve 4 are carried in each unit, ripple can be used
Pipe is attached.
Referring to Fig. 2, described extract system can be led to leak detection system by a KF interfaces stainless steel four
Fitting realizes set, i.e. save space, and is easy to share extract system to realize vacuumizing for pipeline.KF
The connecting air faucet of interface stainless steel four-way connector 2 is the shared input port of extract system and leak detection system, is used
Connected in thermal-collecting tube exhaust tail mouth to be measured；Other three interfaces of KF interface stainless steel four-way connectors
Achieved a butt joint with vacuum pump group 6, leak detector 5 by vacuum line 3 respectively, by vacuum line, ionization
Rule 8, Pirani gauge 9 are connected to compound vacuum gauge 7；And flapper valve 4 is provided with the complaint of each vacuum line 3,
Break-make for controlling vacuum line 3.In the present embodiment, described leak detector uses He mass-spectrometer leak detectors,
Stable and reliable for performance, not only sensitivity is high, and easy to operate.The KF interfaces stainless steel four-way connection
The connecting air faucet and vacuum pump group of part are set with respect to 180 degree, and He mass-spectrometer leak detectors and vacuum gauge are with respect to 180
Degree is set.In the order of connection, hose, vacuum pump group, leak detector, the relative position of vacuum meter are fixed
, the purpose for the arrangement is that reducing flow resistance, to greatest extent, most realize reducing gas pressure intensity in pipe soon.For example
After thermal-collecting tube is just connected, slightly take out pipe in vacuum to the degree that can be hunted leak when, close leak detector and very
The flapper valve at sky meter (vacuum gauge) end, opening mechanical pump (group) can quickly reduce vacuum in pipe, this
When, the flapper valve at pump group end is closed, the flapper valve of the flapper valve and vacuum meter of opening leak detector realizes leak detection behaviour
Make.Leak detector carries extract system, but pumping speed is much smaller than single mechanical pump (group), once so pipe
Itself there is larger leak source then to be embodied at the vacuum meter of the other end (vacuum gauge) place.Leak detector and vacuum
Meter relative rectilinear connection is connected also for flow resistance is reduced to greatest extent rather than right angle, being capable of fast reaction.
The following is the detailed procedure of the present invention：
The connection of extract system and leak detection system is first carried out, all vacuum systems are should ensure that in connection
It is clean and dry, connect the flange valve and rubber of KF interface stainless steel four-ways connector 2 after finishing
Flexible pipe 1 is replaced with KF plugs, opens leak detector 5 and flapper valve 4, carries out each junction of system and weldering
The self-inspection of seam, it is such as qualified, then it is stand-by.
With reference to Fig. 2, the tested slot type high-temperature vacuum heat-collecting tube that welding sequence is completed on line is installed to leak detection
Support 13, by the use of adiabatic termination 11 as support member, lays down KF plugs, with the stabilization of rubber hose 1
Connection thermal-collecting tube exhaust tail mouth 14 and leak detection system.
Reference picture 3, carries out the wiring of heat waste test equipment and channel check, connects samming heating system, adds
Thermal control system, data collecting system and upper computer control system.
Reference picture 4 provides whole testing process.
After vacuum system connection is finished, leak detection system leak detector unit and compound vacuum gauge unit are closed
In flapper valve, open vacuum pump group flapper valve and vacuum pump group be evacuated, now using vacuum
Pump group accelerates in thermal-collecting tube vacuum reduction.
After about 10 minutes, the baffle plate of leak detector unit is opened after the vavuum pump sound of vacuum pump group is steady
Valve, and leak detection function is opened, now leak detector can gradually be switched to " small by common " stripping pattern formula "
(now as thermal-collecting tube does not have big vacuum defect, leak detector can then be entered " small stripping pattern formula " stripping pattern formula ".
If now thermal-collecting tube has solder skip, sand holes etc. to cause relatively large vacuum to reveal, leak detector will not jump to " small
Stripping pattern formula ", can now be easier to be examined by hand, estimate, listen sound etc. to find leak source).Leak detector
Registration opens vacuum gauge flapper valve not when the bounce of the order of magnitude, opens compound vacuum gauge, now needs
The vacuum registration of vacuum meter and leak detector is observed, this vacuum reading can be gradually if thermal-collecting tube is normal
Decline, vacuum readings now are in 1E according to different manufacturing process-3~1E0Pa scopes.
Pump group flapper valve is closed after leak detector back end drop of pressure or stabilization, vacuum line now is utilized
Leak detector carries pump group and stablizes and maintain system vacuum, (is less than after after leak detector pressure registration stabilization
100Pa ranks), (be less than 10 after leak rate drift stabilization-9Pa·m3/ s scopes), examined using He mass spectrums
The supporting He gas bags of leakage instrument and valve carry out leak detection operation to each weld seam of thermal-collecting tube.Fig. 5 is given once true
Sky monitoring and the result of leak detection test, transverse axis represent the duration of runs of vavuum pump, and the longitudinal axis represents leak detector
The reading of interior vacuum meter.Vacuum system vacuum in thermal-collecting tube after 15 minutes as can be seen from Figure<1
Pa, can now be hunted leak online, complete the step to thermal-collecting tube quality control most critical.Complete
Heating control system can be opened afterwards, carry out online heat waste test.
After the completion of leak detection operation, the flapper valve of leak detector unit is closed, open the baffle plate of vacuum meter unit
Valve, opens the flapper valve of vacuum pump group, and vacuum is maintained using vacuum pump group, is ready for thermal-collecting tube and exists
Line heat waste is tested.
Heating control system, data collecting system are opened in test before starting, and according in advance setting
Heating schedule is heated to target temperature and (not equality of temperature may be selected according to heating system performance and test target
Degree scope, this embodiment provides 200~400 DEG C of scopes, as shown in Fig. 6 transverse axis).Wait vacuum system
(be given by vacuum meter reading, because thermal-collecting tube is not exhausted sealed-off treatment, vacuum after system stabilization
Can beat within the specific limits, but range of drift should be in the same order of magnitude), and (30 after temperature stabilization
Temperature drift ＜ ± 0.8 DEG C in minute), temperature data and electric power data are recorded by upper computer control system,
Whether rationally fitting result and temperature data distribution according to electric power data judges heat waste, and this is existing skill
Art can be realized.For example, whether just voltage, the current value monitoring according to heater may determine that heater
Often work；The temperature of thermal-collecting tube outer glass tube is recorded, the main cause that outer glass tube temperature rises is stainless steel
Inner tube radiant heat transfer, drawing outer glass tube temperature should also meet T~4 relation with the change curve of test temperature
Curve, whether reasonable (such as matched curve and actual test of data can be judged in test using this curve
Curve can not be fitted very well, then vacuum uniformity and temperature homogeneity can not all ensure, it is necessary to prolong very well
Testing time long).
Electric energy numerical value according to being consumed in test can read or calculate the power of accumulation consumption, can be with profit
With upper computer control system built-in algorithms and write certainly configuration software interface calculate thermal-collecting tube under target temperature
Heat waste：Under the conditions of adiabatic good steady state test, heat collecting pipe heat waste numerical value is approximately equal to conversion to list
The power of the heater supplement of bit length, designs the algorithm and writes configuration software certainly, can be compiled by computer
Cheng personnel complete establishment task using prior art, do not repeat herein.If needed may be used in production process
The heat waste numerical value interval repeatedly to measure different temperatures, because this kind of method of testing needs vacuum system one
Straight work, although the heat waste of thermal-collecting tube is mainly determined by heat radiation in test vacuum ranges, gas
Heat conduction does not account for main composition ratio, but has heat-conducting gas to extract system out via vacuum system in test process
System is outer, and this can cause the heat waste numerical value and actual value of test to have certain deviation, institute to a certain extent
Tested with this and be only used as on-line testing selection, rather than being designed to accurately test heat collecting pipe heat waste.
Strictly speaking heat waste numerical value is defined as：Thermal-collecting tube sheet is dissipated within the unit interval by unit length
Heat, unit is W/m.The actual conditions of Binding experiment test show as：Heat collecting pipe heat waste numerical value is equal to
The heat supplemented to thermal-collecting tube by electrical heating under conditions of adiabatic good, when reaching limit is equal to thermal-arrest
The pipe heat that scattering losses fall in itself.Due to this kind of on-line testing method it is emphasised that quickly grasping thermal-collecting tube
Can, do not do excessive requirement for the accuracy of heat waste numerical value, so herein intuitively using heat waste numerical value as plus
The unit power of hot device unit interval supplement understands.
The parameters such as electric current, voltage, cumulative power are should be noted in experimentation, these parameters are not in reality
Test in result and directly embody, but one is played for the availability deciding of result in experimental test procedures and be set for
With.For example：When three-phase electrically heated rod is heated, if one addition hot pin go wrong (due to being high temperature,
Often occur that breaking problem), cause this phase current to be 0, other two-phase heating rods still can work,
Although certain heating-up temperature finally can also be reached according to temperature control setting, bulk temperature uniformity is bad.Three
Mutually the parameters of electric power of electricity determines the power of final accumulation, consumption electric energy, and this can influence to survey to a certain extent
The heat waste numerical value for coming is tried out, meeting disturbed test personnel make erroneous judgement to the quality for being tested pipe.So in test
During, it is necessary to monitor whether these parameters normal, normal process variable just can determine that final result conjunction
Reason.
After the completion of test, heat waste curve and other Monitoring Data curves are drawn, according to curve determined set
Whether properties of hot pipe is up to standard, as abnormal big or abnormal small in there is numerical value, needs whether concrete analysis is subsequently arranged
Sealing gland from.It is probably coatings emissivity bigger than normal if data are abnormal greatly, or material outgassing is excessive in system,
Need to extend baking time in exhaust；Data are abnormal small, need check test equipment whether normal work,
The problems such as whether heater has open circuit, contacts bad.Stop heating after the completion of test, by heating
System is passed through compressed air increases convection current rapidly to thermal-collecting tube cooling, disconnects thermal-collecting tube and vacuum leak hunting system
System connection, removes samming heating system, and qualified thermal-collecting tube continues to carry out follow-up sealed-off operation on line.
Fig. 6 provides an on-line testing heat waste result, and transverse axis represents heating-up temperature, and the longitudinal axis represents heat waste
Numerical value, test maintains 0.5Pa under extract system work.Matched curve is chosen according to heat-transfer character
AT+bT4 modes (prior art), it can be seen that matched curve and test point meet preferably, ginseng
Number a has the physical characteristic related in itself to thermal-collecting tube to parameter b, and a is the heat biography for weighing linear heat transfer
Lead characteristic, b close to Stephan-Boltzmann constants, for weighing the thermal radiation property of system.
The various embodiments described above can be subject to some changes in the case where protection scope of the present invention is not departed from, therefore more than
Explanation include and accompanying drawing shown in structure should be regarded as exemplary, and be not used to limit Shen of the present invention
Please patent protection domain.
Claims (10)
1. the online heat waste test system of a kind of slot type high-temperature vacuum heat-collecting tube, by extract system and leak detection system
System, samming heating system, heating control system, data collecting system and upper computer control system composition,
Described samming heating system is used to be heated for measured tube；Electricity is included in described heating control system
Power transmitter, temperature controller and logging, control is implemented for the heated condition to samming heating system；
Described data collecting system is used to gather measured parameter and export to upper computer control system to realize number
According to automatic storage；It is characterized in that：
Described samming heating system is arranged on the on-line testing station of thermal-collecting tube general assembly line, is included
One heater, the heater is collectively formed by heating rod and samming copper pipe, two ends of the heater
Head is covered with adiabatic termination and is seated on a pair of leak detection supports by the adiabatic termination respectively；
A vacuum pump group, vacuum line and flapper valve are included in described extract system；
Two-way is included in described leak detection system：It is all the way leak detector unit, another road is compound vacuum gauge
Unit, the intake line of each unit is on vacuum line, and each vacuum line and carries flapper valve；
Described extract system realizes set with leak detection system by a pipeline connecting parts；KF interface stainless steels
The flange valve of four-way connector as extract system and leak detection system shared input interface, for
Thermal-collecting tube exhaust tail mouth connection to be measured；Other three interfaces of KF interface stainless steel four-way connectors：
Achieved a butt joint with vacuum pump group, leak detector by vacuum line respectively, by vacuum line, ionization gauge
Compound vacuum gauge is connected to Pirani gauge；And it is provided with flapper valve in each part connecting portion.
2. the online heat waste test system of slot type high-temperature vacuum heat-collecting tube as claimed in claim 1, it is special
Levy and be：Described leak detector uses He mass-spectrometer leak detectors；Described pipeline connecting parts are connect using KF
Mouth stainless steel four-way connector.
3. the online heat waste test system of slot type high-temperature vacuum heat-collecting tube as claimed in claim 2, it is special
Levy and be：The connecting air faucet and vacuum pump group of the KF interfaces stainless steel four-way connector are with respect to 180 degree
Set, He mass-spectrometer leak detectors and vacuum gauge are set with respect to 180 degree.
4. the online heat waste test system of slot type high-temperature vacuum heat-collecting tube as claimed in claim 1, it is special
Levy and be：A rubber hose is arranged, KF interface stainless steels four-way is connected when being tested for online heat waste
The flange valve of part is connected with thermal-collecting tube exhaust tail mouth to be measured；A KF plugs are arranged, for sealing KF
The flange valve of interface stainless steel four-way connector, to realize the online preceding each junction of heat waste test of system
And the self-inspection of weld seam.
5. the online heat waste method of testing of a kind of slot type high-temperature vacuum heat-collecting tube, with Claims 1-4
In system described in any one, it is characterised in that specific method step is as follows：
A) thermal-collecting tube for completing will be welded and removes welding post, be installed on on-line testing station, made
The samming copper pipe of warm heating system is located in thermal-collecting tube, and the adiabatic termination at two ends seals the both sides of thermal-collecting tube
Port；
B) thermal-collecting tube exhaust tail mouth to be measured is made with described extract system and inspection by an intermediate duct
The input port connection of leakage system；
C) start extract system and leak detection system, each vacuum tube is maintained using the vacuum pump group of extract system
Vacuum in road, realizes that vacuum line leak detection and the vacuum of system are monitored using leak detection system；
D) start samming heating system and heating control system, be heated to target temperature；
E) by the temperature controller and logging detection temperature stability and vacuum stability of heating control system, obtain
The temperature parameter of temperature controller and logging is taken, and is recorded by configuration software, such as temperature stability and vacuum
Stability reaches test request carries out next step heat waste test；
F) record electricity monitor obtain parameters of electric power data, at least including active power, each phase current,
Voltage, power factor and cumulative power supplemental characteristic；
G) temperature parameter and parameters of electric power validity of analysis record temperature controller and logging, such as without exception
Then convert real-time heat waste parameter, wherein, this is as good as referring to heating-up temperature exception, uniform sexual abnormality
With electrical parameter exception, heat waste conversion principle be：The general power of heat waste numerical value=heater unit interval supplement；
Illustrate that heater or thermal-collecting tube have problem in itself if any abnormal conditions, the abnormal then problem of electrical parameter is present
In heater, the abnormal then problem of temperature parameter is appeared on thermal-collecting tube.
H) it is completed, stops heating, thermal-collecting tube and extract system and leak detection system is disconnected after cooling
Connection, removes samming heating system, and measured tube is transferred into subsequent processing.
6. the online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube as claimed in claim 5, it is special
Levy and be：Heat waste curve and other Monitoring Data curves are drawn after the completion of test, is determined according to curve
Whether whether thermal-collecting tube performance is up to standard, as abnormal big or abnormal small in there is numerical value, make a concrete analysis of and subsequently arranged
Sealing gland from；If data are abnormal big, it is necessary to extend baking time when thermal-collecting tube is vented；Data are abnormal small, need
Check test equipment whether normal work, qualified thermal-collecting tube continues to carry out follow-up sealed-off work on line
Sequence.
7. the online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube as claimed in claim 5, it is special
Levy and be：The record of the temperature and parameters of electric power all should meet limit, i.e. compound vacuum gauge
Stable reading, range of drift is in 1E-2~1E-1Pa, and temperature parameter data stabilization at 15 minutes
It is interior, heter temperature range of drift<2 degrees Celsius.
8. the online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube as claimed in claim 5, it is special
Levy and be：In the step C, during test, according to the limit leak rate of leak detector as examination criteria；
The pressure readings that compound vacuum gauge is given need to be less than 100The Pa orders of magnitude.
9. the online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube as claimed in claim 5, it is special
Whether levy is to judge heat collecting pipe heat waste numerical value according to the distribution of the fitting result and temperature data of electric power data
Rationally：The temperature of thermal-collecting tube outer glass tube is recorded, change curve of the outer glass tube temperature with test temperature is drawn,
Judge whether heat collecting pipe heat waste numerical value is reasonable using this curve.
10. the online heat waste method of testing of slot type high-temperature vacuum heat-collecting tube as claimed in claim 9, its
It is characterised by：If matched curve and actual test curve matching reach satisfaction, thermal-collecting tube heat is judged
Numerical value is damaged rationally, conversely, then judging that heat collecting pipe heat waste numerical value is unreasonable, it is necessary to the extended testing system time.
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