CN201945397U - Cold end compensating and heat-insulating device for thermocouple - Google Patents
Cold end compensating and heat-insulating device for thermocouple Download PDFInfo
- Publication number
- CN201945397U CN201945397U CN2010206746287U CN201020674628U CN201945397U CN 201945397 U CN201945397 U CN 201945397U CN 2010206746287 U CN2010206746287 U CN 2010206746287U CN 201020674628 U CN201020674628 U CN 201020674628U CN 201945397 U CN201945397 U CN 201945397U
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- China
- Prior art keywords
- conduit
- cold junction
- thermocouple
- thermometer
- stirring rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004033 plastic Substances 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000004321 preservation Methods 0.000 claims abstract 6
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 38
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 241000719178 Carangoides ruber Species 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 9
- 210000003934 vacuole Anatomy 0.000 description 5
- 239000006260 foam Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
一种热电偶冷端补偿保温装置，包括瓶体和安装在瓶体顶部的瓶盖。瓶体内壁安装真空保温瓶内胆，瓶盖顶部开有温度计插孔、电热偶线插孔和搅拌棒插孔，下部安装有第一导管和第二导管，第一导管和第二导管上部分别连通温度计插孔和电热偶线插孔，下部分别连通第一塑料腔体和第二塑料腔体。使用时温度计的液泡和电热偶线末端的冷端都位于瓶体内的第一塑料腔体和第二塑料腔体中部，第一塑料腔体和第二塑料腔体都开有很多小孔，冰水中的水能流入其中而冰却不能进入。本实用新型具有操作简单、测量误差小的优点。
A thermocouple cold junction compensation and heat preservation device comprises a bottle body and a bottle cap installed on the top of the bottle body. The inner wall of the bottle is equipped with a vacuum thermos liner, and the top of the bottle cap is provided with a thermometer jack, a thermocouple wire jack and a stirring bar jack, and the lower part is equipped with a first conduit and a second conduit, and the upper part of the first conduit and the second conduit are respectively It is connected with the thermometer jack and the thermocouple wire jack, and the lower part is respectively connected with the first plastic cavity and the second plastic cavity. When in use, the liquid bubble of the thermometer and the cold end of the end of the thermocouple wire are located in the middle of the first plastic cavity and the second plastic cavity in the bottle body. The first plastic cavity and the second plastic cavity have many small holes. Water in water can flow into it but ice cannot. The utility model has the advantages of simple operation and small measurement error.
Description
Technical field
The utility model relates to building thermal technique performance test field, is specifically related to a kind of cold junction compensation attemperator.
Background technology
When using thermopair to carry out temperature test, measuring with cold junction in theory is canonical measure at zero degree, yet instrument is under the room temperature when measuring usually, because the non-vanishing degree of cold junction causes thermoelectric potential difference to reduce, makes to measure and is forbidden, and mistake occurs.The indemnifying measure of being done is exactly cold junction compensation; Require the temperature of its cold junction (measuring junction is the hot junction, and the end that is connected with metering circuit by lead-in wire is called cold junction) to remain unchanged during thermocouple measuring temperature, its thermoelectrical potential size just is certain proportionate relationship with the measurement temperature.If when measuring, (environment) temperature variation of cold junction is with the serious accuracy of measuring of influence.Take the certain measure compensation at cold junction and be called The Cold-Junction Compensation for Thermocouple because cold junction temperature changes the influence that causes.
At present, the most frequently used a kind of cold junction compensation mode is to use thermos filled with ice aqueous mixtures (temperature of mixture of ice and water is about zero degree, and temperature variation is small), and the cold junction of thermopair is directly placed thermos.But, present this way can't be avoided the uneven distribution of mixture of ice and water temperature in the thermos, can't monitor the water temperature in the thermos, can't avoid thermocouple cold junction to contact simultaneously, more can't avoid thermocouple cold junction to contact with the ice cube surface with thermos bottle wall.This cold junction compensation mode brings bigger error certainly will for the measurement of temperature.
The utility model content
At the prior art above shortcomings, problem to be solved in the utility model just provides that a kind of the cold junction error is little when the thermocouple resistance thermometric, measures cold junction compensation attemperator accurately.
The technical solution adopted in the utility model is as follows: a kind of cold junction compensation attemperator, comprise bottle and the bottle cap that is installed in the bottle top, and described bottle inwall is installed the Vacuum insulation bottle inner bag; It is characterized in that: described bottle cap is provided with thermowell, electroheat pair line jack and stirring rod jack, described thermowell and electroheat pair line jack are connected with first conduit and second conduit respectively, this first conduit and second conduit are used for gap installation thermometer and the electric heating amphitene is inserted, and all offer at least one aperture on the tube wall of described first conduit and second conduit; Described stirring rod jack is equipped with stirring rod.
At least one aperture is all sealed and had in the bottom of described first conduit (2) and second conduit (3).
The bottom of described first conduit (2) and second conduit (3) is separately installed with first plastic chamber (5) and second plastic chamber (6), evenly is provided with at least one aperture on described first plastic chamber (5) and second plastic chamber (6).
The handle of described stirring rod (11) passes described bottle cap (1) top, and this stirring rod (11) bottom bends and be positioned at the below of described first conduit (2) and second conduit (3).
When using the utility model, a certain amount of mixture of ice and water of in bottle, packing into, cover bottle cap, water in the mixture of ice and water sees through the aperture that is provided with on first conduit, first plastic chamber, second conduit, second plastic chamber, to be positioned at subsurface inner space and all fill water, and the ice in the frozen water can not enter above-mentioned four inner space.Insert thermometer by thermowell, by the electroheat pair line jack electroheat pair cold junction is placed on second plastic chamber middle part, wherein thermocouple cold junction is in the water, water constantly carries out heat transmission with ice, therefore the temperature variation of water is small, and do not contact, have a narrow range of temperature uniformity of temperature profile around the thermocouple cold junction with ice in the frozen water; Thermocouple cold junction does not contact with the inwall of second plastic chamber, and measuring error is little; The thermometer lower end is positioned at first plastic chamber middle part, and does not contact with the inwall of first plastic chamber, can accurately measure the water temperature at first plastic chamber middle part; According to certain hour at interval, extract the registration that thermometer is checked thermometer rapidly out,, stir frozen water a period of time gently with stirring rod and get final product if judge that the temperature variation of thermometer measure is bigger.
The utlity model has following advantage: thermocouple cold junction is in the water, and does not contact with ice in the frozen water, have a narrow range of temperature around the thermopair, and uniformity of temperature profile, and avoided contacting with the inner bag inwall, reduced measuring error; The vacuole of thermometer is arranged in the water at first plastic chamber middle part, the frozen water temperature that can accurately measure and check thermos inside by thermometer.
By moving up and down the glass stirring mixture of ice and water in this attemperator is stirred; By reading the numerical value on the standard mercury thermometer, can know the temperature variations of mixture of ice and water temperature in this attemperator, can in time carry out the interpolation of ice cube, thereby guarantee comparatively stable, the cold junction compensation temperature accurately of thermopair.
Description of drawings
Fig. 1 is the structural representation of the utility model when specifically implementing.
Among the figure, 1-bottle cap, 2-the first conduit, 3-the second conduit, 4-vacuum glass heat-insulating inner bag, 5-the first plastic chamber, 6-the second plastic chamber, 7-bottle, 9-foam piece, 10-thermometer, 11-stirring rod, 12-rubber sheet gasket, 13-thermocouple wire.
Embodiment
Embodiment 1: as shown in Figure 1, a kind of cold junction compensation attemperator, comprise bottle 7 and the bottle cap 1 that is installed in bottle 7 tops, at bottle 7 inwalls Vacuum insulation bottle inner bag 4 is installed, bottle cap 1 top has thermowell, electroheat pair line jack and stirring rod jack, first conduit 2 and second conduit 3 also are installed on bottle cap 1, and wherein first conduit, 2 tops communicate with thermowell, and the bottom is positioned at described bottle 7; Described second conduit 3 tops communicate with described electroheat pair line jack, and the bottom is positioned at described bottle 7; The bottom of first conduit 2 and second conduit 3 be separately installed with first plastic chamber 5 that is drilled with aperture and second plastic chamber, 6, the first conduits 2 and second conduit 3 respectively with first plastic chamber 5 and second plastic chamber, 6 internal communication.Pass the stirring rod jack stirring rod 11 is installed, this stirring rod 11 is L-shaped, stirring rod 11 handles pass bottle cap 1 top, suit rubber sheet gasket 12 on stirring rod 11 handles, stirring rod 11 bottoms bending and be positioned at first plastic chamber 5 and second plastic chamber, 6 belows.On the tube wall of first conduit 2 and second conduit 3, all offer a lot of apertures.
During use, a certain amount of mixture of ice and water of in bottle 7, packing into, the amount of frozen water is good so that first plastic chamber 5 and second plastic chamber 6 are positioned at the middle part of frozen water.The bottleneck on bottle 7 tops is an external thread, and bottle cap 1 is connected with whorl of bottleneck, with bottle 7 sealings; First conduit 2, second conduit, 3 the latter halfs immerse frozen water, liquid water in the frozen water is by first conduit 2, second conduit 3, the aperture that is provided with on first plastic chamber 5 and second plastic chamber 6 flows into their inside, to be positioned at first conduit 2 of the water surface with the lower part, second conduit 3, and first plastic chamber 5 and second plastic chamber, 6 inside all fill water, insert thermometer by thermowell, a foam piece 9 is installed in the upper end of thermometer, the thermometer lower end is arranged in first plastic chamber 5, and foam piece 9 can stop thermometer to fall to contacting with first plastic chamber, 5 bottoms.By the electroheat pair line jack electroheat pair cold junction is placed on second plastic chamber, 6 middle parts, the electroheat pair cold junction does not contact with the inwall of second plastic chamber 6, and the thermocouple wire 13 that the electroheat pair cold junction connects stretches out bottle cap 1, and is fixing with the thermocouple wire 13 that adhesive tape etc. will stretch out.
The purpose of all offering aperture on first conduit 2 and second conduit, 3 tube walls is that the liquid level in first conduit 2, second conduit 3 is communicated with the liquid level of frozen water in the bottle, reduces in the bottle and the heat interchange of the outer space environment influence to the vacuole of the cold junction of thermocouple resistance and thermometer as far as possible.
Suit rubber sheet gasket 12 can prevent that stirring rod 11 from falling into bottle 7 on stirring rod 11 handles.When using the thermocouple resistance thermometric, check temperature at interval according to certain hour, when checking temperature, extract the registration that thermometer is checked thermometer rapidly out, if judge that the thermometer temperature variation is bigger, stir frozen water gently with stirring rod 11, or open and stir frozen water again after bottle cap adds an amount of ice cube, purpose is to make the water around thermometer vacuole and the thermocouple resistance cold junction flow rapidly by a series of apertures, make the temperature of thermometer vacuole and thermocouple resistance cold junction water on every side remain on the less state of the temperature difference constantly, reduce measuring error.
Embodiment 2: a kind of cold junction compensation attemperator, and its structure, principle of work are consistent with embodiment 1 described device, and different is that first conduit 2 and second conduit, 3 bottoms all seal and all have a plurality of apertures.
When using this utility model to carry out cold junction compensation, can use the mixture of ice and water in 11 pairs of devices of glass stirring rod to stir to guarantee the even distribution of water temperature, immediately measure so that carry out the interpolation of ice cube by 10 pairs of water temperatures of standard mercury thermometer, the use of plastic catheter, plastic chamber avoided thermometer vacuole, thermocouple cold junction to contact with the direct of device wall, ice cube, thereby guaranteed the accuracy of thermometer temperature measurement, cold junction compensation.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206746287U CN201945397U (en) | 2010-12-22 | 2010-12-22 | Cold end compensating and heat-insulating device for thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206746287U CN201945397U (en) | 2010-12-22 | 2010-12-22 | Cold end compensating and heat-insulating device for thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945397U true CN201945397U (en) | 2011-08-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206746287U Expired - Fee Related CN201945397U (en) | 2010-12-22 | 2010-12-22 | Cold end compensating and heat-insulating device for thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201945397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595592A (en) * | 2016-12-13 | 2017-04-26 | 武汉理工大学 | Double-direction inclinometer based on liquid level horizontal principle |
-
2010
- 2010-12-22 CN CN2010206746287U patent/CN201945397U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595592A (en) * | 2016-12-13 | 2017-04-26 | 武汉理工大学 | Double-direction inclinometer based on liquid level horizontal principle |
| CN106595592B (en) * | 2016-12-13 | 2019-10-25 | 武汉理工大学 | A Two-way Inclinometer Based on the Principle of Liquid Level |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20111222 |