CN204855032U - Thermocouple examination special fixture - Google Patents
Thermocouple examination special fixture Download PDFInfo
- Publication number
- CN204855032U CN204855032U CN201520654206.6U CN201520654206U CN204855032U CN 204855032 U CN204855032 U CN 204855032U CN 201520654206 U CN201520654206 U CN 201520654206U CN 204855032 U CN204855032 U CN 204855032U
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- clamp
- thermocouple
- dop
- calibration unit
- thermopair
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Abstract
The utility model discloses a thermocouple examination special fixture, it is including the clamp A and the clamp B that link together, clamp A is used for connecting the positive pole of thermocouple, clamp B is used for connecting the thermocouple negative pole, clamp A, B all is provided with the spring clamp structure, spring clamp structure front end is the dop, clamp A, the dop of B inner core and clamp presss from both sides a mouthful department and all uses the metal material that the heat conductivility is good, clamp A, B contacts the connection, it is nevertheless insulating between the two, at the inside temperature sensor that is provided with of clamp B end, and be connected with outside electric survey equipment through the data line, clamp A, the terminal welding signal line of core metal in B is inside, and be connected to outside electric survey equipment, compare current calibrating installation, structural design is reasonable for this invention product, and can be operated and used conveniently, the measurement process is simple and direct, high measurement precision.
Description
Technical field
The utility model relates to a kind of checkout equipment of thermopair, is specially a kind of thermocouple calibration unit clamp.
Background technology
Thermopair is a kind of sensor the most frequently used in temperature measurement industry, its temperature-measurement principle is based on thermoelectric effect principle, namely the conductor of two kinds of heterogeneities welds or links together, when its two ends be in not equality of temperature field time, thermoelectrical potential will be produced in the loop, by measuring the size of thermoelectrical potential thus measuring temperature.In thermopair use procedure, due to the vaporization at high temperature of thermode, grain structure changes, and the reasons such as oxidation corrosion, often occur aged deterioration, its pyroelecthc properties is changed, causes temperature measurement error.In order to make its thermometric accurate, industrial thermocouple not only needs when dispatching from the factory to carry out close inspection, and in use needs regularly to examine and determine.The periodic calibration method of thermopair commonly uses relative method, namely utilizes a kind of method that the accredited thermopair of higher leveled standard hot even summation directly compares, and tested and standard couple is banded together and put into assay furnace during operation.Relative method is divided into again bipolar process, like poles method, differential method, normal employing twin-stage method in reality calibrating: after accredited thermopair and standard couple are tied up, be placed in electric thermo-couple test furnace same position, the thermoelectrical potential value of the tested thermopair of standard hot even summation is measured respectively with electric logging equipment, the potential value of the electromotive force-temperature inversion formula in recycling ITS90 temperature scale and the relevant temperature point in standard certificate, calculate tested thermopair on this temperature spot with the deviation of ITS90 temperature scale Plays value.
Above-mentioned proving installation and the current Problems existing of method: need tested thermopair to be well connected with the copper cash being connected to electric logging equipment with the reference edge of standard couple in thermocouple calibration process, carry out the compensation of thermopair reference junction temperature.At present, conventional thermopair reference junction temperature compensation method mainly contains and adopts zero degree Freezing point device reference edge penalty method and adopt temperature sensor reference edge Auto-Compensation-Method.If adopt Freezing point device to make reference end compensating, usually need strand copper wire and thermocouple wire to be adopted the stubborn mode connect to be connected, twist the connected mode be connected together and there is following problem: 1. wiring behaviour does loaded down with trivial details, and efficiency is very low.If tested idol is armoured thermocouple, also need other using compensation wire that the both positive and negative polarity on the ring flange of thermopair rear end is introduced freezing point bottle, operation bothers very much.2. copper cash is easily oxidized, and need through conventional sand papering to ensure that contact is good, result causes connecting line shorter and shorter.3. the thermo wires of thermopair is often twisted and can be broken.If the mode adopting external temperature sensor reference edge to compensate is examined and determine, usual use crocodile clip connects, crocodile clip connected mode can bring following problem: 1. the crocodile clip of routine cannot meet the requirement of verification process to parasitic electromotive force usually, the parasitic electromotive force of industry regulations stipulate will lower than 0.4 μ V, and common crocodile clip cannot reach this standard-required.2. reference junction temperature compensates deviation, here main cause be thermopair in the course of the work, heat can be passed to reference edge in working end, especially shorter thermopair, therefore the temperature of reference edge is actual in environment temperature, and external reference edge sensor can only measure room temperature, although so use the mode of external reference edge simple to operate, error is larger.3. have branched galvanic couple in verification process, its reference junction temperature is all not identical, and external reference edge compensates usually only with one, therefore uses same external reference edge to compensate and can cause larger measuring result error yet.4. the thermocouple wire of thermopair is usually thiner, is easily subject to the impact of environmental temperature fluctuation, and then increases the error component in verification result.
Summary of the invention
For solving the technical matters existing for above-mentioned measurement mechanism and metering system, spy of the present invention provides a kind of thermocouple calibration unit clamp, and reasonable in design is easy for operation, and measuring process is simple and direct, measuring accuracy is high, and calibration method is more simple and accurate.
For achieving the above object, the technical solution used in the present invention is: a kind of thermocouple calibration unit clamp, it comprises the clamp A and clamp B that link together, clamp A is used for connecting the positive pole of thermopair, clamp B is used for connecting thermopair negative pole, clamp A, B is provided with spring clamp structure, spring clamp structure front end is dop, clamp A, the dop clamp mouth part of B inner core and clamp all uses the metal material of good heat conductivity, clamp A, B contacts connection, but insulate between the two, clamp B terminus inner is provided with temperature sensor, and be connected with outside electric logging equipment by data line, clamp A, B inner inner core metal end welding signal line, and be connected to outside electric logging equipment.
Described spring clamp structure, comprise the hinged holder in middle part and portable plate, hinged place, middle part is provided with torsion spring, and both front ends form the dop of clamp, and dop is interlocked under torsion spring acting force.
The holder of clamp A, B is fixed together, and this kind of structural union is applicable to examine and determine thermocouple wire.
Clamp A, another connected mode of the holder of B is for being flexibly connected, concrete structure is: clamp A holder is provided with strip dovetail tongue and clip, the holder of clamp B is provided with the chute and straight pin that match with dovetail tongue, dovetail tongue and slide are rabbeted, when both perfect embeddings connect, straight pin snaps in clip, the object of this structural design is exactly to make clamp A, B close contact connects, under guarantee thermocouple wire herein remains on same temperature environment, the effect that split connects is clamp A, B also can separate two terminals pressing from both sides separately thermopair, especially armoured thermocouple, use when the larger unfavorable gripping of termination screw.
Described clamp inner core thickness is greater than 7mm, and thickness is too thin easily by the influence of fluctuations of environment temperature.
Described clamp inner core selects red copper or other similar material of good heat conductivity.
Further, in order to prevent material oxidation, electroplating processes is done on clamp dop surface.
Clamp A, the dop internal gearing tooth trace of B is the same, i.e. clamp A, the inner occlusal crib profile of B is the same, the occlusal crib of plurality of specifications is provided with in dop, in order to adapt to different size, the thermocouple junction of shape, structure comprises the arc column groove coordinated with armouring spiral shell head, the V-arrangement tooth engaged matched with different-diameter thermocouple wire, and pitch with weldering the vertical cylinder concave-convex clutch groove that inserted sheet joint coordinates, object guarantees to allow thermopair reference edge reliably be connected with fixture, and connection area is maximized, the temperature of the temperature of fixture and thermopair reference edge can be made like this to reach unanimity as much as possible.
Described temperature sensor is connected by the heat-conducting metal of heat-conducting silicone grease with B clamp.
Described temperature sensor is placed on the end of clamp B, and its effect is the temperature parameter detecting terminals in real time.
A kind of thermocouple calibration method utilizing above-mentioned fixture:
The thermometric working end of tested thermopair is placed in constant temperature assay furnace, the other end of thermopair passes through the clamp A of above-mentioned fixture, the both positive and negative polarity of B difference occlusal contact condition thermopair is as reference end, by clamp A, B connects together, and be fixedly connected with by the clip structure of this device, by clamp A, B interior metal end welding signal line connects from external electric logging equipment and obtains different potential value, by the temperature sensor in fixture, the real-time temperature values of metal fixture is sent to external equipment, offset data is obtained by formulae discovery, obtain through calculating, the verification result of accredited thermopair.
Beneficial effect of the present invention is:
1. can as crocodile clip quick connection thermopair reference edge, behaviour do the electric property having easily simultaneously and connect reference edge with copper cash.
2. can fast, the thermopair reference edge of the nearly all specification of compact siro spinning technology, mode, eliminate Freezing point device or zero degree thermostat and relevant behaviour and do flow process, reduce costs, improve calibrating efficiency.
3. large-area contact can farthest make the metal material of fixture and the reference junction temperature of thermopair reach unanimity, and increase the thermal inertia of thermopair reference edge, avoid the negative effect that the fluctuation because of environment temperature brings verification process, improve measuring accuracy.
4. by this fixture, often prop up tested thermopair and all there is independently reference edge, avoid the gauging error brought because of reference edge difference.
5. maximum advantage is when inapplicable Freezing point device, also can obtain almost identical thermocouple calibration result.
6. utilize the calibration method of this fixture, shorten calibrating behaviour and do flow process, simplify calibration method, direct gripping fixed reference end, convenient, fast, efficiency is high.
Accompanying drawing explanation
Fig. 1 is this inventive embodiments structural representation;
Fig. 2 is dop internal gearing bathtub construction schematic diagram in Fig. 1;
Fig. 3 is the fixed seat structure schematic diagram of clamp B in Fig. 1;
Fig. 4 is the fixed seat structure schematic diagram of clamp A in Fig. 1.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Embodiment described in following exemplary embodiment does not represent all embodiments consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of device that aspects more of the present invention are consistent.
A kind of thermocouple calibration unit clamp, it comprises the clamp A1 and clamp B2 that link together, clamp A1 is used for connecting the positive pole of thermopair, clamp B2 is used for connecting thermopair negative pole, clamp A, B is provided with spring clamp structure, spring clamp structure front end is dop 3, clamp A, the dop clamp mouth part of B inner core and clamp all uses the metal material of good heat conductivity, clamp A, B contacts connection, but insulate between the two, clamp B2 terminus inner is provided with temperature sensor 4, temperature sensor 4 is connected with outside electric logging equipment by data line, clamp A, B inner inner core metal end welding signal line, and be connected to outside electric logging equipment.
Described clamp A1 or clamp B2, interchangeable when being connected with thermopair, namely clamp A can be connected with the positive pole of thermopair or be connected with negative pole, can't produce different effects and impact to verification result.
Described spring clamp structure, comprise the hinged holder 6 in middle part and portable plate 5, hinged place, middle part is provided with torsion spring, and both front ends form the dop 3 of clamp, and dop 3 is interlocked under torsion spring acting force.
Clamp A, another connected mode of the holder of B is for being flexibly connected, concrete structure is: clamp A1 holder is provided with strip dovetail tongue 12 and clip 13, the holder of clamp B2 is provided with the chute 10 and straight pin 11 that match with dovetail tongue 12, dovetail tongue 12 and chute 10 slide and rabbet, when both perfect embeddings connect, straight pin 11 snaps in clip 13, the object of this structural design is exactly to make clamp A, B close contact connects, under guarantee thermocouple wire herein remains on same temperature environment, the effect that split connects is clamp A, B also can separate two terminals pressing from both sides separately thermopair, especially armoured thermocouple, use when the larger unfavorable gripping of termination screw.
Further, above-mentioned clip 13 also can design the other end at clamp A, namely the interchangeable direction of clamp A, B connects together, make the dop of the dop of clamp B2 and clamp A1 towards the opposite, even clip 13 can arrange two respectively at the two ends of clamp A, towards arbitrarily adjusting according to actual conditions.
The holder of clamp A, B also can be fixed together, and this kind of structural union is only applicable to examine and determine thermocouple wire.
Described clamp A, B inner core thickness is greater than 7mm, and thickness is too thin easily by the influence of fluctuations of environment temperature.
Described clamp inner core selects red copper or other similar material of good heat conductivity.
Further, in order to prevent material oxidation, electroplating processes is done on clamp dop 3 surface.
The dop internal gearing tooth trace of clamp A, B is the same, namely the inner occlusal crib profile of clamp A, B is the same, the occlusal crib of plurality of specifications is provided with in dop, in order to adapt to the thermocouple junction of different size, shape, structure comprises the arc column groove 7 coordinated with armouring spiral shell head, can be engaged in dop by spiral shell cephalic par after dop occlusion, spiral shell head clamping is in post groove; The V-arrangement tooth engaged 8 matched with different-diameter thermocouple wire, V-arrangement tooth engaged can be divided multiple according to thermocouple wire diameter, often organize crown most advanced and sophisticated in tooth engaged not pure pointed structures, after dop occlusion, certain space can be retained between V-arrangement tooth, prevent the tooth engaged of complete closure from biting thermocouple wire broken, and it is tightr that thermocouple wire is contacted with dop; The vertical cylinder concave-convex clutch groove that inserted sheet joint coordinates is pitched with weldering, object guarantees to allow thermopair reference edge reliably be connected with fixture, and connection area is maximized, the temperature of the temperature of fixture and thermopair reference edge can be made like this to reach unanimity as much as possible.
Described temperature sensor 4 is connected with clamp B heat-conducting metal by heat-conducting silicone grease.
Described temperature sensor 4 is placed on the end of clamp B, and its effect is the temperature parameter detecting terminals in real time.
A kind of thermocouple calibration method utilizing above-mentioned fixture:
The thermometric working end of tested thermopair is placed in constant temperature assay furnace, the other end of thermopair passes through the clamp A of above-mentioned fixture, the both positive and negative polarity of B difference occlusal contact condition thermopair is as reference end, by clamp A, B connects together, and be fixedly connected with by the clip structure of this device, by clamp A, B interior metal end welding signal line connects from external electric logging equipment and obtains different potential value, by the temperature sensor in fixture, the real-time temperature values of metal fixture is sent to external equipment, offset data is obtained by formulae discovery, obtain through calculating, the verification result of accredited thermopair.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a thermocouple calibration unit clamp, it is characterized in that: it comprises the clamp A and clamp B that link together, clamp A is used for connecting the positive pole of thermopair, clamp B is used for connecting thermopair negative pole, clamp A, B is provided with spring clamp structure, spring clamp structure front end is dop, clamp A, the dop clamp mouth part of B inner core and clamp all uses the metal material of good heat conductivity, clamp A, B contacts connection, but insulate between the two, clamp B terminus inner is provided with temperature sensor, and be connected with outside electric logging equipment by data line, clamp A, B inner inner core metal end welding signal line, and be connected to outside electric logging equipment.
2. thermocouple calibration unit clamp according to claim 1, it is characterized in that: described spring clamp structure, comprise the hinged holder in middle part and portable plate, hinged place, middle part is provided with torsion spring, both front ends form the dop of clamp, and dop is interlocked under torsion spring acting force.
3. thermocouple calibration unit clamp according to claim 2, is characterized in that: the holder of clamp A, B is fixed together, and this kind of structural union is applicable to examine and determine thermocouple wire.
4. thermocouple calibration unit clamp according to claim 2, it is characterized in that: the holder connected mode of clamp A, B is for being flexibly connected, clamp A holder is provided with strip dovetail tongue and clip, the holder of clamp B is provided with the chute and straight pin that match with dovetail tongue, dovetail tongue and slide are rabbeted, when both perfect embeddings connect, straight pin snaps in clip.
5. thermocouple calibration unit clamp according to claim 1, is characterized in that: described clamp inner core thickness is greater than 7mm.
6. thermocouple calibration unit clamp according to claim 1, is characterized in that: described clamp inner core selects red copper or other similar material of good heat conductivity.
7. thermocouple calibration unit clamp according to claim 6, is characterized in that: electroplating processes is done on clamp dop surface.
8. thermocouple calibration unit clamp according to claim 1, it is characterized in that: the dop internal gearing tooth trace of clamp A, B is the same, the occlusal crib of plurality of specifications is provided with in dop, structure comprises the arc column groove coordinated with armouring spiral shell head, the V-arrangement tooth engaged matched with different-diameter thermocouple wire, and pitch with weldering the vertical cylinder concave-convex clutch groove that inserted sheet joint coordinates.
9. thermocouple calibration unit clamp according to claim 1, is characterized in that: described temperature sensor is connected by the heat-conducting metal of heat-conducting silicone grease with B clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654206.6U CN204855032U (en) | 2015-08-27 | 2015-08-27 | Thermocouple examination special fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654206.6U CN204855032U (en) | 2015-08-27 | 2015-08-27 | Thermocouple examination special fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855032U true CN204855032U (en) | 2015-12-09 |
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ID=54745571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520654206.6U Withdrawn - After Issue CN204855032U (en) | 2015-08-27 | 2015-08-27 | Thermocouple examination special fixture |
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| CN (1) | CN204855032U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058275A (en) * | 2015-08-27 | 2015-11-18 | 泰安磐然测控科技有限公司 | Clamp special for detecting thermocouple and method for detecting thermocouple |
-
2015
- 2015-08-27 CN CN201520654206.6U patent/CN204855032U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058275A (en) * | 2015-08-27 | 2015-11-18 | 泰安磐然测控科技有限公司 | Clamp special for detecting thermocouple and method for detecting thermocouple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20170329 |
|
| AV01 | Patent right actively abandoned |