CN1041560C - Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method - Google Patents
Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method Download PDFInfo
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- CN1041560C CN1041560C CN 94116965 CN94116965A CN1041560C CN 1041560 C CN1041560 C CN 1041560C CN 94116965 CN94116965 CN 94116965 CN 94116965 A CN94116965 A CN 94116965A CN 1041560 C CN1041560 C CN 1041560C
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Abstract
The present invention provides a device for continuously detecting the thermoelectric potential homogeneity of an electric coupling wire material and a method thereof. The device is composed of a transmission system, a heating system, a measuring system and a protective system. A hot end of a standard electric coupling wire is fixed on a movable hot junction in a furnace, and a cold end of the standard electric coupling wire is connected with a millivoltmeter. The detected coupling wire passes through the movable hot junction in the furnace in the process of passing through the transmission system, and the other end of the detected coupling wire enters a take-up system by a movable cold junction of the millivoltmeter to form a thermoelectric coupling loop with the standard electric coupling wire. Consequently, the detected coupling wire can successfully pass through, and moreover, the good contact between the detected coupling wire and other systems can be ensured because of the movable cold junction and the movable hot junction. Thus, the thermoelectric potential of the electric coupling wire can be continuously tested.
Description
The invention belongs to the micro voltage fields of measurement.Mainly be applicable to the inhomogeneous thermoelectrical potential of measuring thermopair.
The silk material that is used to make thermopair is because the unevenness of (particularly issuable chemical analysis, sintered metal product) institutional framework, stress distribution and annealing in process etc. in process of production, usually cause thermocouple wire material difference along its length, produced the unevenness of heat outputting electromotive force.When unevenness surpasses certain value, just can not match the thermopair that meets the requirement of thermometric algnment accuracy.Therefore, for high precision thermopair (as W-Re and platinum rhodium thermocouple etc.), need each is carried out the inhomogeneity detection of thermoelectrical potential respectively to positive and negative the two poles of the earth of thermopair.
The inhomogeneity detection method of existing thermocouple wire thermoelectrical potential be from the positive and negative electrode thermo wires of whole dish head,, tail gets the sample of some respectively, then with the head of each utmost point, in, tailfiber intersects collocation, detect the size of its output potential at a certain temperature, determine the homogeneity (YB4084-92 " measuring the molten steel temperature Wolfram rhenium heat electric couple fast ") of this batch thermo wires thus, thereby instruct the coupling degree of accuracy of galvanic couple.
There is following shortcoming in the above-mentioned method of inspection:
(1) the thermoelectrical potential homogeneity with several samples replaces whole homogeneity of coiling thermo wires (tens meters to hundreds of rice), and representativeness is very limited, is difficult to representation faithfulness.
(2) requirement if discovery thermoelectrical potential unevenness is above standard need double sampling according to the rules and detect; And, for the thermo wires of defective part, how to wipe out, what are wiped out, can't judge, for this reason, cause whole dish thermocouple wire material to cancel.
(3) this detection method belongs to brokenly the base check, because of the sample that takes off after test, can not utilize again, cause waste.
The object of the present invention is to provide and a kind ofly can accurately detect thermocouple wire material thermoelectrical potential homogeneity, and nondestructive thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus and method.
Thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus of the present invention is made up of kinematic train, heating system, measuring system and protection system.
Wherein, kinematic train dynamically links to each other by detected galvanic couple silk with measuring system, and detected galvanic couple silk passes the boiler tube of heating system, and protection system links to each other with heating system with draft tube by gas piping
Described kinematic train is made of actinobacillus device, guide wheel and take-up; Wherein actinobacillus device 1, guide wheel and take-up dynamically link to each other by detected galvanic couple silk.
Described heating system is made of heating furnace, boiler tube, extension and temperature control; Wherein, boiler tube is in the heating furnace, and extension links to each other with boiler tube by connecting pipe, and temperature controller links to each other with boiler tube by operation circuit.
Described measuring system is made of millivoltmeter, standard electric thermo wires, movable hot junction, counter and printer; One end of standard electric thermo wires links to each other with movable hot junction, and the other end links to each other with fixed contact on the millivoltmeter, and printer links to each other with millivoltmeter by signal wire, and counter is located on the working line of detected galvanic couple silk.
Described protection system is made of gas source, gas piping, draft tube and gas outlet; Wherein gas piping links to each other with draft tube with gas source respectively, and draft tube links to each other with the extension of heating system.
Now in conjunction with the accompanying drawings thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus of the present invention is described further.
Accompanying drawing 1 is a thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus structural representation of the present invention.
Accompanying drawing 2 is for advancing silk and hot junction part-structure synoptic diagram.
Accompanying drawing 3 is wire vent and induction part structural representation.
Among the above-mentioned figure, 1 is actinobacillus device, and 2,9,10 is guide wheel; 3 is heating furnace, and 4 is heating furnace tube, and 5 is temperature controller; 6 is extension, and 7 is gas source, and 8 is gas piping; 11 is millivoltmeter, and 12 is counter, and 13 is printer; 14 is the movable cold junction of millivoltmeter, and 15 is movable hot junction, and 16 is the millivoltmeter fixed contact; 17 is take-up; 18 is the standard thermo wires, and 19 is detected thermo wires, and 20 is connecting pipe; 21 is the gas outlet; 22 is porcelain tube, and 23 is plug, and 31 is plug; 32 is thermo wires export orientation pipe, and 33 is the blanket gas draft tube.
Found out that by figure thermocouple wire material thermoelectrical potential uniformity continuous detection apparatus of the present invention is by power train System, heating system, measuring system and protection system form.
Wherein, transmission system dynamically links to each other by detected galvanic couple silk 19 with measuring system, and is detected Galvanic couple silk 19 pass the boiler tube 4 of heating system, protection system by appendix 8 and air inlet pipe 33 with Heating system links to each other;
Described transmission system by actinobacillus device 1, guide wheel 2,9,10 and take-up 17 consist of; Its In actinobacillus device 1, guide wheel 2,9,10 and take-up 17 dynamically link to each other by detected galvanic couple silk.
Described heating system is made of heating furnace 3, boiler tube 4, extension 6 and temperature controller 5; Wherein, Boiler tube 4 is in the heating furnace 3, and extension 6 links to each other temperature controller 5 by tube connector 20 with boiler tube 4 Link to each other with boiler tube 4 by control circuit.
Described measuring system is by millivoltmeter 11, standard electric thermo wires 18, movable hot junction 15, counter 12 and printer consist of; One end of standard electric amphitene 18 links to each other with movable hot junction 15, the other end with Fixed contact 16 on the millivoltmeter 11 links to each other, and printer 13 links to each other with millivoltmeter 11 by holding wire, Counter 12 is located on the working line of detected galvanic couple silk 19.
Described protection system is made of gas source 7, appendix 8, air inlet pipe 33 and gas outlet 21; Wherein appendix 8 links to each other with air inlet pipe 33 with gas source 7 respectively, and air inlet pipe 33 is prolonged with heating system Stretching pipe 6 links to each other.
Movable hot junction 15 in the boiler tube 4 and the movable cold junction 14 of millivoltmeter had both guaranteed and detected idol Silk 19 has good contact, and detected thermo wires can be passed through smoothly smoothly. Thereby assurance is measured Continuity and accuracy; Temperature controller 5 is used for the temperature of control heating furnace 3; Counter 12 is used for memory Exceed the extension position of standard-required (from tested with detected thermo wires 19 its thermoelectrical potential inhomogeneities of demonstration The head of surveying thermo wires is counted); Printer 13 except do general record use, will be detected especially afterwards The extension position that thermo wires thermoelectrical potential inhomogeneities exceeds standard-required marks, so that with removal; By Plug 23 and 31 is under the sealing state boiler tube 4, is beneficial to and passes into protective gas, prevents under the high temperature The thermo wires oxidation; The effect of extension 6 is to provide cold for the thermocouple wire 19 that is come out by heating furnace 3 high-temperature regions But place. Thermocouple wire 19 is in extension 6, because its enough length and cold conditions protective gas Flow through, make thermocouple wire be chilled to very soon room temperature, prevent that thermo wires 19 from walking out extension 6, enter quilt behind the atmosphere Oxidation.
Thermocouple wire material thermoelectrical potential uniformity continuous detecting method of the present invention comprises following concrete steps:
(1) forms the thermopair loop
Detected galvanic couple silk 19 is pulled out by actinobacillus device 1,, enter the movable cold junction 14 of millivoltmeter through guide wheel 2, porcelain tube 22, movable hot junction 15, extension 6, thermo wires export orientation pipe 32, guide wheel 9,10; The hot junction of standard electric thermo wires 18 is fixed on the movable hot junction 15, and cold junction is connected on the millivoltmeter fixed contact 16, so far, forms the thermopair loop by standard electric thermo wires 18, detected galvanic couple silk 19 and millivoltmeter 11.Simultaneously, detected galvanic couple silk 19 enters take-up again through counter 12.
(2) logical blanket gas in heating furnace 3
Open gas source 7, blanket gas enters boiler tube 4 again through gas piping 8, blanket gas draft tube 33, extension 6.Overflowed by gas outlet 21, the blanket gas traffic direction is opposite with detected thermo wires 19 traffic directions.
(3) start heating furnace
After feeding blanket gas, start heating furnace 3 at once, heat up, and by temperature controller 5, with Control for Kiln Temperature in the preset detection temperature.
(4) continuous detecting
When furnace temperature reaches institute's preset detection temperature, start take-up 17, the thermopair loop is brought into operation.When each point is by movable hot junction 15 on the detected thermo wires 19, with standard thermo wires 18 couplings, form the thermopair loop and make one millivolt of value of demonstration on the millivolt 11, this value then is the thermoelectrical potential of the point that contacts with movable hot junction 15 of detected thermo wires, unison counter 12 is write down the position of this point, be above standard when requiring when meeting, printer 13 marks in corresponding position, so that remove later on.
Along with the continuous running of actinobacillus device 1 and take-up 17, detected thermo wires 19 by movable hot junction 15 and the movable cold junction 14 of millivoltmeter, is measured the detected thermo wires thermoelectrical potential of whole dish continuously.The fluctuation range of this thermoelectrical potential is just represented the unevenness of detected thermo wires.
Compared with prior art, the present invention has following advantage:
1, can carry out comprehensive homogeneity to whole dish thermo wires and detect, thereby can ensure the quality of products comprehensively.
2, can count and stamped mark, thereby can wipe out the defective part of homogeneity easily, avoid the thermo wires material to be scrapped because of the defective and whole dish of part.
3, belong to non-broken base check, whole tested thermo wires materials are not suffered a loss and are damaged.
Embodiment
Adopt thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus of the present invention and method, continuous detecting the homogeneity of thermoelectrical potential of four batches of W-Re galvanic couple silks.The trade mark, polarity, specification, the length of four batches of W-Re galvanic couple silks and match the standard electric thermo wires trade mark and test condition are as shown in table 1.
Test is carried out continuously.Draw test result by millivoltmeter 11, and the inhomogeneity test result of thermoelectrical potential is printed on the record paper, draw accompanying drawing 4 and accompanying drawing 5 by printer 13.
Accompanying drawing 5 is the detected W-Re galvanic couple silk thermoelectrical potential homogeneity curve map of negative pole.Among the figure, b
1And b
2Be respectively lot number 3 and lot number 4 detected W-Re galvanic couple silk thermoelectrical potential homogeneity curves.
From Fig. 4,5, find out OA
1, OA
3, OB
1With the O coordinate figure be respectively lot number 1, lot number 2, batches 3 and the background of batch thermoelectric thermal uniformities of 4 detected W-Re galvanic couple silks poor, their actual unevenness is respectively:
The actual unevenness value of lot number 1 is:
︱OA
2-OA
1︱=︱45-20︱=︱25︱(μV)
The actual unevenness value of lot number 2 is:
︱OA
4-OA
3︱=︱-35-(-15)︱=︱20︱(μV)
The actual unevenness value of lot number 3 is:
︱OB
2-OB
1︱=︱-35-(-18)︱=︱17︱(μV)
The actual unevenness value of lot number 4 is:
︱OB
4-OB
3︱=︱12-(-8)︱=︱20︱(μV)
Table 2 has been listed the detected galvanic couple silk thermoelectrical potential homogeneity of four lot numbers and the deviation and the unevenness value of standard silk.
The trade mark of the detected W-Re galvanic couple of table 1 embodiment silk, specification etc. and test condition
The deviation and the unevenness value of the detected W-Re galvanic couple of table 2 embodiment silk thermoelectrical potential homogeneity and standard silk
Claims (3)
1, a kind of thermocouple wire material thermoelectrical potential homogeneity continuous detection apparatus, this device is made up of kinematic train, heating system, measuring system and protection system; Wherein, kinematic train dynamically links to each other by detected galvanic couple silk (19) with measuring system, and detected galvanic couple silk (19) passes the boiler tube (4) of heating system, and protection system links to each other with heating system with draft tube (33) by gas piping (8);
Described kinematic train is made of actinobacillus device (1), guide wheel (2,9,10) and take-up (17); Wherein actinobacillus device (1), guide wheel (2,9,10) and take-up (17) dynamically link to each other by detected galvanic couple silk (19),
Described heating system is made of heating furnace (3), boiler tube (4), extension (6) and temperature controller (5); Wherein, boiler tube (4) is in the heating furnace (3), and extension (6) links to each other with boiler tube (4) by connecting pipe (20), and temperature controller (5) links to each other with boiler tube (4) by operation circuit;
Described measuring system is made of millivoltmeter (11), standard electric thermo wires (18), movable hot junction (15), counter (12) and printer (13); One end of standard electric thermo wires (18) links to each other with movable hot junction (15), the other end links to each other with fixed contact (16) on the millivoltmeter (11), printer (13) links to each other with millivoltmeter (11) by signal wire, and counter (12) is located on the working line of detected galvanic couple silk (19);
Described protection system is by gas source (7), gas piping (8), draft tube (33) and gas outlet (21) formation; Wherein gas piping (8) links to each other with draft tube (33) with gas source (7) respectively, and draft tube (33) links to each other with the extension (6) of heating system.
2, device according to claim 1 is characterized in that extension (6) communicates for sealing links to each other with boiler tube (4).
3, a kind of thermocouple wire material thermoelectrical potential homogeneity continuous detecting method comprises the steps:
Form the thermopair loop---detected galvanic couple line (19) is pulled out by actinobacillus device (1), through guide wheel (2), porcelain tube (22), movable hot junction (15), extension (6), galvanic couple silk export orientation pipe (32), guide wheel (9,10), enter the movable cold junction (14) of millivoltmeter (11); The hot junction of standard electric thermo wires (18) is fixed on the movable hot junction (15), and cold junction is connected on the fixed contact (16) of millivoltmeter (11), and detected galvanic couple silk (19) forms the thermopair loop with standard electric thermo wires (18);
To the logical blanket gas of heating furnace (3)---open source of the gas (7), blanket gas enters in the boiler tube (4) through gas piping (8), draft tube (33), extension (6) again;
Start heating furnace (3)--behind-feeding the blanket gas, start heating furnace (3), and heat up, reach the preset detection temperature;
Continuous detecting---when furnace temperature reaches detected temperatures, start take-up (17), detected galvanic couple silk (19) is brought into operation, when certain point of detected galvanic couple silk (19) passes through movable hot junction (15), mate with standard electric thermo wires (18), form the thermopair loop, make and demonstrate one millivolt of value on the millivoltmeter (11), this value then is the thermoelectrical potential of detected galvanic couple silk (19) and movable hot joining contact (15); Along with the continuous running of actinobacillus device (1) and take-up (17), then can detect the thermoelectrical potential of whole dish galvanic couple silk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116965 CN1041560C (en) | 1994-10-19 | 1994-10-19 | Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116965 CN1041560C (en) | 1994-10-19 | 1994-10-19 | Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1112676A CN1112676A (en) | 1995-11-29 |
| CN1041560C true CN1041560C (en) | 1999-01-06 |
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ID=5038187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94116965 Expired - Lifetime CN1041560C (en) | 1994-10-19 | 1994-10-19 | Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method |
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|---|---|
| CN (1) | CN1041560C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397071C (en) * | 2005-10-14 | 2008-06-25 | 哈尔滨工业大学 | Method and apparatus for measuring material Seebeck coefficient |
| JP2013044042A (en) * | 2011-08-26 | 2013-03-04 | Hitachi Metals Ltd | Heat treatment apparatus for metal wire rod |
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1994
- 1994-10-19 CN CN 94116965 patent/CN1041560C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1112676A (en) | 1995-11-29 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: GENERAL RESEARCH INST. OF IRON AND STEEL, MINISTRY OF METALLURGICAL INDUSTRY TO: ANTAI SCIENCE AND TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Antai Science and Technology Co., Ltd. Patentee before: Iron and Steel Central Research Institute of Ministry of Metallurgical Industry |
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| CX01 | Expiry of patent term |
Expiration termination date: 20141019 Granted publication date: 19990106 |