CN204389067U - A kind of shallow type temperature checking stove that declines - Google Patents
A kind of shallow type temperature checking stove that declines Download PDFInfo
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- CN204389067U CN204389067U CN201420860825.6U CN201420860825U CN204389067U CN 204389067 U CN204389067 U CN 204389067U CN 201420860825 U CN201420860825 U CN 201420860825U CN 204389067 U CN204389067 U CN 204389067U
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- combustion chamber
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Abstract
The utility model relates to detector unit calibration, belongs to Measurement and calibration field.A kind of shallow type temperature checking stove that declines, it is characterized in that comprising right cylinder combustion chamber, the patchhole installing detector unit to be measured is provided with in combustion chamber, around patchhole is block, ceramic electrical heating tube is set with around combustion chamber excircle, annular furnace is set with outside described ceramic electrical heating tube, multiple small-sized heating rod is evenly provided with around combustion chamber in described burner hearth, described burner hearth outer wrapping heat-insulation layer, monitoring temperature sensor installing plate is also provided with below combustion chamber and burner hearth, be used for the proof armored platinum resistor of temperature control is installed, temperature-control hole is from the bottom up had in combustion chamber, proof armored platinum resistor up extend in the temperature-control hole of combustion chamber from bottom, body of heater shell is had outside described heat-insulation layer, be provided with upper cover above, below platinum resistance installing plate, lower cover is installed, air holes is had in the middle of lower cover, it is base of furnace body below lower cover, fan is provided with in described base of furnace body.
Description
Technical field
The utility model relates to detector unit calibration, particularly relates to a kind of shallow type temperature checking stove that declines.
Background technology
Along with improving constantly of industrial production automation degree, commercial production enterprise is aobvious outstanding to the demand day of field calibration.On-the-spot thermometric calibrating installation is increasingly used for industrial temperature field calibration.Need to carry out Detection & Controling to temperature in many industries.Conventional detector unit is platinum resistance, thermocouple thermometer, usually use the calibration cell such as water-bath or oil bath as constant temperature field during calibrating/calibration, the better degree of stability of temperature homogeneity of this kind of calibration cell is high, little by extraneous thermal effect, but the volume of this kind of calibration cell is all huger, temperature stabilization times is longer, cannot meet the needs of on-the-spot rapid verification or calibration.
At present, abroad succeeded in developing for the quickly calibrated all kinds of stem body temperature checking stoves in scene.Temperature checking stove mainly comprises several large types such as high accuracy dry-well checker, industrial dry-well checker, thermopair checker.Its temperature test scope is from-45 DEG C to 1200 DEG C; Temperature field accuracy is generally ± and about 0.1 DEG C; Temperature field wave degree of moving is generally ± and about 0.01 DEG C; Temperature field uniformity be generally ± about 0.05 DEG C.It is using air as calibrate medium, and volume is little, lightweight, is therefore applied to field calibration work more and more.
But, field-checking has the temperature sensor of some special sizes, the platinum resistance of such as short (40 ~ 50) mm or thermocouple sensor, and short or the thermistor temperature sensor etc. at right angle all cannot use as calibration support equipment by serviceability temperature verification stove, because now all temperature checking furnace foundations are originally all remained on bottom the stove heart by temperature-controlled precision.Only have tested temperature sensor can be inserted into temperature checking furnace bottom, the accuracy of guarantee metering.And the well depth of temperature checking stove minimum in the world is at present 102mm, when the length of tested temperature sensor is lower than 102mm, just cannot carry out the calibration of scene temperature at present to this sensor.
Such as oil opening/closed mouth flash point tester, automatic distillation instrument, condensation instrument, the air-conditioning experiment porch of current on-line testing, laboratory and workshop condition system for detecting temperature, the temperature sensor even comprising aircraft engine experiment porch and nuclear power projects is all that size is very short, the PT100 of specification special (some is right angle) or thermopair, these sensors are all assemblied on equipment, cannot dismantle, on-line calibration can only be carried out to its sensing head.Particularly oil opening/closed mouth flash point tester, belong to the instrument had a large capacity and a wide range, the production relevant to oil and detection enterprise are provided with the flash point tester of at least two, and this kind of instrument is by the Precision measurement to temperature, and interval time, the flash-point of fluid was measured in igniting scanning.Its temperature sensor size is short, the longest only 60mm, and therefore with existing equipment, we cannot carry out accurately this kind of instrument and in-site measurement easily.Reference fluid sample is also still used to detect flash point tester, but this kind of method uncertainty of measurement is quite high, temperature spot is fixed, cannot calibrate flash point tester serviceability temperature gamut, and reference fluid sample is not easily preserved, use the term of validity quite short (generally only having one-year age).
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of shallow type temperature checking stove that declines, the volume solving present calibration cell is all huger, temperature stabilization times is longer, the needs of on-the-spot rapid verification or calibration cannot be met, and the temperature-controlled precision of temperature checking stove bottom the stove heart and well depth fix, the defect that cannot verify some special temperature elements.
Technical scheme
A kind of shallow type temperature checking stove that declines, it is characterized in that: comprise right cylinder combustion chamber, the patchhole installing detector unit to be measured is provided with in combustion chamber, around patchhole is block, ceramic electrical heating tube is set with around combustion chamber excircle, described ceramic electrical heating tube is slightly longer than combustion chamber, section bottom encases combustion chamber, annular furnace is set with outside described ceramic electrical heating tube, multiple small-sized heating rod is evenly provided with around combustion chamber in described burner hearth, described burner hearth outer wrapping heat-insulation layer, monitoring temperature sensor installing plate is also provided with below described combustion chamber and burner hearth, be used for the proof armored platinum resistor as monitoring temperature sensor is installed, temperature-control hole is from the bottom up had in combustion chamber, described proof armored platinum resistor is arranged on monitoring temperature sensor installing plate, up extend in the temperature-control hole of combustion chamber from bottom, described heat-insulation layer outer with body of heater shell by combustion chamber from the inside to the outside, ceramic electrical heating tube, burner hearth and heat-insulation layer all wrap up, be provided with upper cover above, below platinum resistance installing plate, lower cover is installed, air holes is had in the middle of lower cover, it is base of furnace body below lower cover, fan is provided with in described base of furnace body.
In described combustion chamber, the well depth of patchhole is less than or equal to 60mm, and the well depth of described temperature-control hole is more than or equal to 40mm.
Described block adopts the replaceable block splicing of polylith, and make patchhole in combustion chamber have multiple diameter, block adopts red copper material to make.
The power of described ceramic electrical heating tube is 500W, the power of described small-sized heating rod is 25W, described small-sized heating rod is with the central point of combustion chamber for the center of circle is angularly configured with 6, and by the putting hole of described heating rod, nearly burner hearth home position is also provided with the wind guide tank from top to bottom of semicircle.
Described ceramic electrical heating tube, small-sized heating rod and fan are all electrically connected with temperature controller by high temperature wire, described proof armored platinum resistor is also electrically connected with temperature controller, temperature controller receives the temperature signal that proof armored platinum resistor transmits, and controls ceramic electrical heating tube, small-sized heating rod and fan and makes the temperature in combustion chamber reach fast and maintain in the temperature of needs.
Beneficial effect
The shallow type temperature checking stove that declines of the present utility model is with two kinds of structure of controlling temperature combinations and sectional type temperature control, can make when well depth is less than or equal to 60mm, the warm field of verification furnace interior is made to reach balance very soon, be convenient to test, improve measuring accuracy, can not only be used for the calibration of short temperature detection sensor and on-the-spot on-line calibration, and the precision of calibration is very high; The block design that employing can be changed, increases upper and lower covers up and down at combustion chamber, can carry out replacement verification to the temperature sensor of special size.
Accompanying drawing explanation
Fig. 1 is the inner structure schematic diagram of the shallow type temperature correction stove that declines of the present utility model.
Fig. 2 is the schematic top plan view of combustion chamber of the present utility model.
Fig. 3 is the schematic top plan view of burner hearth of the present utility model.
Fig. 4 is the A-A cross-sectional schematic of Fig. 3 burner hearth.
Wherein: 1-combustion chamber, 2-patchhole, 3-ceramic electrical heating tube, 4-burner hearth, 5-heat-insulation layer, 6-monitoring uses temperature sensor installing plate, 7-temperature-control hole, 8-body of heater shell, 9-upper cover, 10-lower cover, 11-base, the small-sized heating rod mounting hole of 12-, 13-wind guide tank, 14-mounting hole.
Embodiment
Below in conjunction with specific embodiments and the drawings, set forth the utility model further.
Present compact temperature verification stove adopts the mode of bottom-heated substantially, and need the combustion chamber degree of depth of detection check can only have about 45mm for the platinum resistance of short (40 ~ 50) mm or thermocouple sensor, therefore adopt the mode of bottom-heated cannot arrive temperature control accuracy and the requirement of fluctuation degree of needs completely.
In R&D process, the heater strip of 500W is arranged in block circumferencial direction by the type of heating having used for reference high-temperature temperature verification stove, but found through experiments temperature control effect undesirable, temperature fluctuation is very poor.Therefore evenly make a call to 6 holes again in burner hearth surrounding, insert the heating rod of 2 ~ 6 25w, reduce temperature fluctuation, effectively control the temperature overshot that occurs in heating and cooling process or cross the problem of falling.
The shallow type temperature checking stove that declines after well designed, comprise right cylinder combustion chamber, the patchhole installing detector unit to be measured is provided with in combustion chamber, around patchhole is block, ceramic electrical heating tube is set with around combustion chamber excircle, described ceramic electrical heating tube is slightly longer than combustion chamber, section bottom encases combustion chamber, annular furnace is set with outside described ceramic electrical heating tube, multiple small-sized heating rod is evenly provided with around combustion chamber in described burner hearth, described burner hearth outer wrapping heat-insulation layer, monitoring temperature sensor installing plate is also provided with below described combustion chamber and burner hearth, be used for the proof armored platinum resistor of temperature control is installed, temperature-control hole is from the bottom up had in combustion chamber, described proof armored platinum resistor is arranged on described monitoring temperature sensor installing plate, up extend in the temperature-control hole of combustion chamber from bottom, described heat-insulation layer outer with body of heater shell by combustion chamber from the inside to the outside, ceramic electrical heating tube, burner hearth and heat-insulation layer all wrap up, be provided with upper cover above, below platinum resistance installing plate, lower cover is installed, air holes is had in the middle of lower cover, it is base of furnace body below lower cover, fan is provided with in described base of furnace body.Be inner structure signal as shown in Figure 1.
In described combustion chamber, the well depth of patchhole is less than or equal to 60mm, adopts 45mm in the constructive embodiment of accompanying drawing 1.Because during field-checking temperature sensor, often meet the sensor that diameter is different, so in the combustion chamber of the temperature checking stove of this Project design the diameter dimension of patchhole from 3.2mm ~ 6.5mm, see that accompanying drawing 2 is illustrated, and samming can be changed soon, adopt the replaceable block splicing of polylith, and adopt red copper material to make.The power of described ceramic electrical heating tube is 500W, described small-sized heating rod with the central point of combustion chamber for the center of circle is angularly configured with 6, the power of each small-sized heating rod is 25W, home position is leaned on also to be provided with the wind guide tank from top to bottom of semicircle at the putting hole of described heating rod, the air of fan blowout is by wind guide tank discharge combustion chamber from bottom to top, play the effect of convection current, accompanying drawing 3 and 4 is chamber structure signal.
Place temperature control temperature sensor in the bottom of block.At the beginning of design, the insertion depth of temperature control temperature sensor is decided to be 20mm, found that temperature control temperature and actual temperature have the difference of 3 ~ 4 degree.Found by repetition test: because temperature control sensor insertion depth in block is excessively shallow, frequent with heat exchange with outside, so the temperature of display and actual temperature greatly differ from each other.In accompanying drawing 1, the insertion depth of temperature-control senser is adjusted to 40mm, then temperature control detected temperatures and actual temperature are almost coincide.
Described ceramic electrical heating tube, small-sized heating rod and fan are all electrically connected with temperature controller, the described proof armored platinum resistor be arranged on monitoring temperature sensor installing plate is also electrically connected with temperature controller, temperature controller receives the temperature signal that proof armored platinum resistor transmits, and controls ceramic electrical heating tube, small-sized heating rod and fan and makes the temperature in combustion chamber reach fast and maintain in the temperature of needs.
This heater calibration can not only be used for the field calibration of short temperature detection sensor, and through actual measurement and emulation, uniform temperature fields, the expanded uncertainty of the result of test can reach U=0.03 DEG C.
Claims (5)
1. the shallow type temperature checking stove that declines, it is characterized in that: comprise right cylinder combustion chamber, the patchhole installing detector unit to be measured is provided with in combustion chamber, around patchhole is block, ceramic electrical heating tube is set with around combustion chamber excircle, described ceramic electrical heating tube is slightly longer than combustion chamber, section bottom encases combustion chamber, annular furnace is set with outside described ceramic electrical heating tube, multiple small-sized heating rod is evenly provided with around combustion chamber in described burner hearth, described burner hearth outer wrapping heat-insulation layer, monitoring temperature sensor installing plate is also provided with below described combustion chamber and burner hearth, be used for the proof armored platinum resistor as monitoring temperature sensor is installed, temperature-control hole is from the bottom up had in combustion chamber, described proof armored platinum resistor is arranged on monitoring temperature sensor installing plate, up extend in the temperature-control hole of combustion chamber from bottom, described heat-insulation layer outer with body of heater shell by combustion chamber from the inside to the outside, ceramic electrical heating tube, burner hearth and heat-insulation layer all wrap up, be provided with upper cover above, below platinum resistance installing plate, lower cover is installed, air holes is had in the middle of lower cover, it is base of furnace body below lower cover, fan is provided with in described base of furnace body.
2. the shallow type temperature checking stove that declines as claimed in claim 1, it is characterized in that: in described combustion chamber, the well depth of patchhole is less than or equal to 60mm, the well depth of described temperature-control hole is more than or equal to 40mm.
3. the shallow type temperature checking stove that declines as claimed in claim 1, is characterized in that: described block adopts the replaceable block splicing of polylith, and make patchhole in combustion chamber have multiple diameter, block adopts red copper material to make.
4. the shallow type temperature checking stove that declines as claimed in claim 1, it is characterized in that: the power of described ceramic electrical heating tube is 500W, the power of described small-sized heating rod is 25W, described small-sized heating rod with the central point of combustion chamber for the center of circle is angularly configured with 6, by the putting hole of described heating rod, nearly home position is also provided with the wind guide tank from top to bottom of semicircle.
5. the shallow type temperature checking stove that declines as claimed in claim 1, it is characterized in that: described ceramic electrical heating tube, small-sized heating rod and fan are all electrically connected with temperature controller by high temperature wire, described proof armored platinum resistor is also electrically connected with temperature controller, temperature controller receives the temperature signal that proof armored platinum resistor transmits, and controls ceramic electrical heating tube, small-sized heating rod and fan and makes the temperature in combustion chamber reach fast and maintain in the temperature of needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420860825.6U CN204389067U (en) | 2014-12-26 | 2014-12-26 | A kind of shallow type temperature checking stove that declines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420860825.6U CN204389067U (en) | 2014-12-26 | 2014-12-26 | A kind of shallow type temperature checking stove that declines |
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| CN204389067U true CN204389067U (en) | 2015-06-10 |
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| CN201420860825.6U Expired - Fee Related CN204389067U (en) | 2014-12-26 | 2014-12-26 | A kind of shallow type temperature checking stove that declines |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502000A (en) * | 2014-12-26 | 2015-04-08 | 上海市计量测试技术研究院 | Shallow-type micro temperature calibration furnace and calibration method |
| CN105157880A (en) * | 2015-09-15 | 2015-12-16 | 南京工程学院 | Thermocouple dynamic response test system and test method thereof |
| CN108534917A (en) * | 2018-05-04 | 2018-09-14 | 上海外高桥造船有限公司 | Dry combustion method stove inner core for ship thermometric |
| WO2019137343A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | Flow guiding and heat dissipating type dry block temperature calibrator |
| CN113514167A (en) * | 2020-04-10 | 2021-10-19 | 北京康斯特仪表科技股份有限公司 | Low-temperature dry body furnace |
| CN114485171A (en) * | 2021-12-31 | 2022-05-13 | 武汉锐科光纤激光技术股份有限公司 | Temperature control furnace and temperature control method thereof |
-
2014
- 2014-12-26 CN CN201420860825.6U patent/CN204389067U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502000A (en) * | 2014-12-26 | 2015-04-08 | 上海市计量测试技术研究院 | Shallow-type micro temperature calibration furnace and calibration method |
| CN104502000B (en) * | 2014-12-26 | 2017-04-26 | 上海市计量测试技术研究院 | Shallow-type micro temperature calibration furnace and calibration method |
| CN105157880A (en) * | 2015-09-15 | 2015-12-16 | 南京工程学院 | Thermocouple dynamic response test system and test method thereof |
| CN105157880B (en) * | 2015-09-15 | 2017-12-08 | 南京工程学院 | A kind of thermocouple dynamic response test system and its method of testing |
| WO2019137343A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | Flow guiding and heat dissipating type dry block temperature calibrator |
| US11740139B2 (en) | 2018-01-09 | 2023-08-29 | Beijing Const Instruments Technology Inc. | Flow guiding and heat dissipating type dry block temperature calibrator |
| CN108534917A (en) * | 2018-05-04 | 2018-09-14 | 上海外高桥造船有限公司 | Dry combustion method stove inner core for ship thermometric |
| CN113514167A (en) * | 2020-04-10 | 2021-10-19 | 北京康斯特仪表科技股份有限公司 | Low-temperature dry body furnace |
| CN114485171A (en) * | 2021-12-31 | 2022-05-13 | 武汉锐科光纤激光技术股份有限公司 | Temperature control furnace and temperature control method thereof |
| CN114485171B (en) * | 2021-12-31 | 2023-11-14 | 武汉锐科光纤激光技术股份有限公司 | Temperature control furnace and temperature control method thereof |
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