CN103487171A - Crocodile-type clamp - Google Patents
Crocodile-type clamp Download PDFInfo
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- CN103487171A CN103487171A CN201310465578.XA CN201310465578A CN103487171A CN 103487171 A CN103487171 A CN 103487171A CN 201310465578 A CN201310465578 A CN 201310465578A CN 103487171 A CN103487171 A CN 103487171A
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- alloy material
- lower jaw
- crocodile
- seebeck coefficient
- thermal couple
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Abstract
The invention relates to a crocodile-type clamp which comprises an upper jaw and a lower jaw. The upper jaw and the lower jaw are connected through a rivet and rivet holes. A spiral spring is arranged between the upper jaw and the lower jaw, the upper jaw and the lower jaw are made of the same alloy material, the seebeck coefficient of the alloy material and the seebeck coefficient of a thermal couple are identical, and the metal properties of the alloy material are identical to those of a positive electrode or a negative electrode of the thermal couple. The crocodile-type clamp has the advantages that the problems that in the process of batch verification of thermal couple temperature sensors, the connection portion of a connecting box or a plug-in piece and a testing wire cannot be placed in a 0-DEG C thermostat of the reference end according to a national metrological verification regulation requirement, the reference end is verified according to an environment temperature correction method, the indeterminacy is high, and therefore a detecting result is prone to instability and unreliability and erroneous judgment is prone to occurrence are thoroughly solved, and therefore the convenience of thermal couple verification and the reliability and the stability of a detecting testing result are greatly improved.
Description
Technical field
The present invention relates to field of test instrument, relate in particular to a kind of crocodile clip.
Background technology
The calibrating of industrial thermocouple product is an important process that carries out quality control in production and use, its calibrating is carried out according to national metrological verification regulations, according to thermocouple temperature measurement principle and measurement verification regulations requirement, in verification process, the cold junction of thermopair (reference edge) must keep 0 ℃ ± 0.1 ℃, so the connection terminal of thermopair connecting test wire must be inserted to 0 ℃ of thermostat (being generally ice chest or electric Freezing point device), and the industrial thermocouple product (is all generally assembled or armored thermopair, test clip (crocodile clip) is specifically designed to electric instrument and on-the-spot test is used), termination is terminal box or connector normally, no matter from volume or on length, can't insert Freezing point device jack equipment after the connecting test wire at all, therefore, most enterprises is to thermocouple calibration, have to adopt the environment temperature revised law.The thermopair length difference that directly is subject to the environment temperature revised law causes a temperature poor impact, and Air Flow causes the environment temperature instantaneous variation, and the thermometer of test environment temperature can not respond fast, all can cause the erroneous judgement of deviation and the product quality of measurement result.
Summary of the invention
The purpose of this invention is to provide a kind of crocodile clip, to overcome the prior art above shortcomings.
The objective of the invention is to be achieved through the following technical solutions:
A kind of crocodile clip, comprise the maxilla and the lower jaw that are connected with rivet hole by rivet, be provided with coil spring between described maxilla and lower jaw, it is characterized in that: described maxilla and lower jaw are same alloy material, the Seebeck coefficient of described alloy material is identical with the thermocouple plug seebeck coefficient, and the metalline of described alloy material is identical with the negative or positive electrode of thermopair.
Further, described alloy material varies with temperature height and can produce corresponding thermoelectrical potential millivolt signal.
Further, the Seebeck coefficient of described alloy material is controlled by the proportioning of regulating chemical element in smelting process.
Beneficial effect of the present invention is: the present invention can thoroughly solve thermocouple temperature sensor and carry out in the batch verification process, can't terminal box be connect by the national metrological verification regulations requirement or connector and test lead connection are inserted in 0 ℃ of thermostat of reference edge, and reference edge adopts the calibrating of environment temperature revised law, there is again larger uncertainty, be easy to cause testing result unstable, unreliable and cause the difficult problem of erroneous judgement, thereby greatly improve the convenience of thermocouple calibration and the reliability and stability of metrology and measurement result.
The accompanying drawing explanation
Below with reference to the accompanying drawings the present invention is described in further detail.
Fig. 1 is the fractionation schematic perspective view of the described crocodile clip of the embodiment of the present invention;
Fig. 2 is the fractionation floor map of the described crocodile clip of the embodiment of the present invention;
Fig. 3 is the wiring layout of the described crocodile clip of the embodiment of the present invention;
Fig. 4 is the upward view of Fig. 3;
Fig. 5 is the application example figure of the described crocodile clip of the embodiment of the present invention.
In figure:
1, maxilla; 2, lower jaw; 3, coil spring; 4, rivet; 5, rivet hole; 6, industrial thermocouple; 7, electric thermo-couple test furnace; 8, anodal crocodile clip; 9, negative pole crocodile clip 10, fine compensation wire positive pole; 11, fine compensation wire negative pole; 12 copper conductors; 13, Freezing point device; 14, testing apparatus.
Embodiment
As Figure 1-5, the described a kind of crocodile clip of the embodiment of the present invention, comprise the maxilla 1 and the lower jaw 2 that are connected with rivet hole 5 by rivet 4, be provided with coil spring 3 between described maxilla 1 and lower jaw 2, it is characterized in that: described maxilla 1 and lower jaw 2 are same alloy material, the Seebeck coefficient of described alloy material is identical with the thermocouple plug seebeck coefficient, and the metalline of described alloy material is identical with the negative or positive electrode of thermopair; Described alloy material varies with temperature height can produce corresponding thermoelectrical potential millivolt signal; The Seebeck coefficient of described alloy material is controlled by the proportioning of regulating chemical element in smelting process.
During concrete the use, two crocodile clips one form using, one supporting with the thermopair positive pole, another and thermopair negative pole are supporting, press shown in Fig. 5, fine compensation wire positive pole 10 is welded on anodal crocodile clip 8, fine compensation wire negative pole 11 is welded on negative pole crocodile clip 9, the positive pole of fine compensation wire and negative pole exit are welded on respectively on copper conductor 12, the pad of fine compensation wire both positive and negative polarity and copper conductor (being exactly usually said cold junction or reference edge) is placed in to Freezing point device 13, then, the exit connecting test equipment 14 of copper conductor 12 formed to detection system.Many thermopairs are carried out to batch while examining and determine, only every group of both positive and negative polarity crocodile clip need to be clipped in respectively on the both positive and negative polarity thermo wires of corresponding tested thermopair 6, just can carry out verification test and operate.Now, because the inner frozen water fusion temperature of Freezing point device 13 remains 0 ℃, the thermoelectrical potential that testing apparatus detects industrial thermocouple 6 just represents the actual temperature of tested industrial thermocouple 6 measuring junctions in electric thermo-couple test furnace 7.Not only can guarantee the absolutely accurate of testing result and highly stable, and the verification test operation is very convenient laborsaving.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but do any variation on its shape or structure; every have identical with a application or akin technical scheme, within all dropping on protection scope of the present invention.
Claims (3)
1. a crocodile clip, comprise the maxilla (1) and the lower jaw (2) that are connected with rivet hole (5) by rivet (4), be provided with coil spring (3) between described maxilla (1) and lower jaw (2), it is characterized in that: described maxilla (1) and lower jaw (2) are same alloy material, the Seebeck coefficient of described alloy material is identical with the thermocouple plug seebeck coefficient, and the metalline of described alloy material is identical with the negative or positive electrode of thermopair.
2. crocodile clip according to claim 1 is characterized in that: described alloy material varies with temperature height can produce corresponding thermoelectrical potential millivolt signal.
3. crocodile clip according to claim 2 is characterized in that: the Seebeck coefficient of described alloy material is controlled by the proportioning of regulating chemical element in smelting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310465578.XA CN103487171A (en) | 2013-09-29 | 2013-09-29 | Crocodile-type clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310465578.XA CN103487171A (en) | 2013-09-29 | 2013-09-29 | Crocodile-type clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103487171A true CN103487171A (en) | 2014-01-01 |
Family
ID=49827572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310465578.XA Pending CN103487171A (en) | 2013-09-29 | 2013-09-29 | Crocodile-type clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103487171A (en) |
Cited By (2)
| 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 |
| CN106961029A (en) * | 2016-01-08 | 2017-07-18 | 广西电网有限责任公司桂林供电局 | A kind of elbow crocodile clip |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202886017U (en) * | 2012-07-24 | 2013-04-17 | 浙江泰索科技有限公司 | Portable polarity extension connector used for thermocouple calibration |
-
2013
- 2013-09-29 CN CN201310465578.XA patent/CN103487171A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202886017U (en) * | 2012-07-24 | 2013-04-17 | 浙江泰索科技有限公司 | Portable polarity extension connector used for thermocouple calibration |
Non-Patent Citations (1)
| Title |
|---|
| 吴博 等: "《机电控制技术原理及应用》", 31 July 2011, 中国电力出版社, article "《常用温度传感器》", pages: 81 * |
Cited By (2)
| 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 |
| CN106961029A (en) * | 2016-01-08 | 2017-07-18 | 广西电网有限责任公司桂林供电局 | A kind of elbow crocodile clip |
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Application publication date: 20140101 |