CN102570327B - Airtight switch cabinet one-time rising test wire clamp - Google Patents
Airtight switch cabinet one-time rising test wire clamp Download PDFInfo
- Publication number
- CN102570327B CN102570327B CN201210054369.1A CN201210054369A CN102570327B CN 102570327 B CN102570327 B CN 102570327B CN 201210054369 A CN201210054369 A CN 201210054369A CN 102570327 B CN102570327 B CN 102570327B
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- wire clamp
- fastening
- switch cabinet
- force
- time rising
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Abstract
The invention discloses a kind of airtight switch cabinet one-time rising test wire clamp, comprise handle, handle is provided with current line nose, current line nose is fixedly connected with fastening wire clamp, it is characterized in that: described fastening wire clamp is rhombus, owing to have employed technique scheme, the present invention pointed strong, easy to operate, be connected firmly, the feature such as safe and reliable, applicability is strong.
Description
Technical field
The present invention relates to a kind of electric equipment, specifically, relate to a kind of airtight switch cabinet one-time rising test wire clamp.
Background technology
A rising test is the indispensable work of daily protection transmission test.Especially replacing CT, verification protective device work time, often through once add current testing come judgment device secondary connection have inerrancy and protection definite value whether accurate.Its workflow is as follows:
Start → dismounting rear cabinet door → strong current generator current cable clamp is fixed on CT two ends → startup strong current generator loading current test → remove current cable clamp → installation rear cabinet door → end.
But find at work, 10kV closed inside switch cabinet narrow space, CT multiselect ZZBJ9 type, its crimping screw mostly is diameter 12mm, minority is 10mm, for meeting security needs, CT both sides often equal wrap insulate sheath on once going between, copper bar and the screw of being only close to CT surface are exposed, and traditional experiment wire clamp is for ensureing contact-making surface through-current capability, its structure comparison is greatly and relatively tighter, and people's one-handed performance is very painstaking, is not easy to use in closed switch cubicle.
In addition, temporarily can only unclamp CT at the trial and be connected copper bar screw with switch static contact, test after the Wiring nose of strong current generator output line and CT exit are compressed, recover again after end, process is loaded down with trivial details, cause when doing a rising test in 10kV closed switch cubicle consuming time longer, inefficiency.
Summary of the invention
The technical problem to be solved in the present invention overcomes above-mentioned defect, provides the airtight switch cabinet one-time rising test wire clamp that a kind of structure is simple, easy to operate and greatly increase work efficiency.
For solving the problem, the technical solution adopted in the present invention is:
Airtight switch cabinet one-time rising test wire clamp, comprise handle, handle is provided with current line nose, and current line nose is fixedly connected with fastening wire clamp, it is characterized in that: described fastening wire clamp is rhombus.
Improve as one:
The angle at wherein one group of diagonal angle of described rhombus is 120 °.
The diagonal angle that the angle ranging from 120 ° is positioned at the both sides of current line nose extended line.
Fastening wire clamp is made into rhombus, makes the interior angle of rhombus identical with the interior angle of copper nut, four sides contact, contact area is large, reliably fastening, requires low to bolt head coupling, and fastening wire clamp and junction are without obvious fever phenomenon.
As further improvement:
The open side of described fastening wire clamp is provided with press fastening device.
Described press fastening device comprises the spacing arm of force, and the spacing arm of force is connected with pull bar, and pull bar is socketed with spring, and the top of the spacing arm of force is fixed with depression bar.
The described spacing arm of force is U-shaped.
Described pull bar is through the openend of fastening wire clamp; Described pull bar is provided with locknut through one end of fastening wire clamp; Described spring is positioned at the openend of fastening wire clamp.
Pull the spacing arm of force, make it upright, the openend of clamping fastening wire clamp, fastening effect is good, can multi-angle fastening, meet the fastening requirements in switch cubicle.
As further improving:
The length of the described spacing arm of force is 8 ㎜.
Because inner space, airtight switch cubicle CT installation place is narrow and small, and there is insulation porcelain side in some CT, according to size and the actual tests data of switch internal and CT insulating arthropleura, determine that the length of the spacing arm of force can not more than 10mm, consider that the longer then fastening effect of the spacing arm of force is better simultaneously, but the pressure of fastening needs is larger, so the length of the spacing arm of force is 8 ㎜ is optimum size.
As further improving:
Described fastening wire clamp is copper wire clamp.
The width of described copper sheet is 12 ㎜, and thickness is 3 ㎜.
The resistivity of copper is 1.7 × 10-8(Ω m), the current capacity of unit cross-sectional area is the strongest, and plasticity is good, has enough amount of elastic deformation, can meet fastening and self-healing requirement.Fastening effect is good, and the temperature rise of contact-making surface is minimum, meets the demands.
In addition, consider the current capacity of fastening wire clamp, select the thickness of fastening wire clamp and width respectively, drawn by test, the width of copper sheet is 12 ㎜, and thickness is 3 ㎜ is optimum size.
Owing to have employed technique scheme, the present invention has the following advantages:
(1) with strong points, wire clamp is small and exquisite, adapts to various airtight switch cubicle;
(2) easy to operate, simple to operate, wire clamp can disconnect efficiently;
(3) be connected firmly, have enough contacts area, the requirement of ampacity can be met;
(4) safe and reliable, there is not the potential safety hazard to testing crew and testing equipment in test;
(5) applicability is strong, can meet the instructions for use of various airtight switch cubicle.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the present invention's airtight switch cabinet one-time rising test wire clamp;
Accompanying drawing 2 is structural representations of press fastening device in the present invention;
Accompanying drawing 3 is mark schematic diagrames of fastening wire clamp in the present invention;
Accompanying drawing 4 is mark schematic diagrames of the spacing arm of force in the present invention.
In figure: 1-handle; 2-fastening wire clamp; The spacing arm of force of 3-; 4-pull bar; 5-spring; 6-depression bar; 7-nut; 8-rotating shaft; 9-locknut; 10-stop nut; 11-set bolt; 12-current line nose; The spacing torque arm length of L-; B-copper sheet width; T-copper thickness.
Embodiment
Embodiment: as shown in Figure 1, airtight switch cabinet one-time rising test wire clamp, comprise handle 1, handle 1 is provided with current line nose 12, current line nose 12 is fixedly connected with fastening wire clamp 2 by set bolt 11, described fastening wire clamp 2 is rhombus, and the angle at wherein one group of diagonal angle of rhombus is 120 °, and the diagonal angle that the angle ranging from 120 ° is positioned at the both sides of current line nose 12 extended line.
The fastening wire clamp 2 of rhombus is when being connected with the CT in airtight switch cubicle, and because joint is hex nut, and the angle of hex nut is 120 °, so four of fastening wire clamp 2 faces can contact with hex nut, contact area is large, reliably fastening.
The open side of described fastening wire clamp 2 is provided with press fastening device, described press fastening device comprises the spacing arm of force 3, the spacing arm of force 3 is connected with pull bar 4, pull bar 4 is by being rotationally connected in the middle part of rotating shaft 8 and the spacing arm of force 3, pull bar 4 is socketed with spring 5, the top of the spacing arm of force 3 is fixed with depression bar 6, and depression bar 6 is fixed by nut 7 and the spacing arm of force 3, and the length L of the described spacing arm of force 3 is 8 ㎜.Wherein pull bar 4 and depression bar 6 are bolt.Certainly, press fastening device also can be play other device pressing solidly fastening wire clamp 2 and act in prior art, as the bolted etc. of twisting with hand.
The described spacing arm of force 3 is U-shaped.Described pull bar 4 is through the openend of fastening wire clamp 2; Described pull bar 4 is provided with locknut 9 through one end of fastening wire clamp 2, and the lower end of locknut 9 is provided with stop nut 10; Described spring 5 is positioned at the openend of fastening wire clamp 2.
The making material of described fastening wire clamp 2 is copper sheet, and the width B of described copper sheet is 12 ㎜, and thickness T is 3 ㎜.Because inner space, airtight switch cubicle CT installation place is narrow and small, and there is insulation porcelain side in some CT, according to size and the actual tests data of the switch internal obtained and CT insulation sides porcelain side, determine that the length of the spacing arm of force more than 10mm, can not finally determine that the length of the spacing arm of force 3 is 8 ㎜.
As for the thickness of fastening wire clamp 2 and the selection of width, be that both determine the current capacity of fastening wire clamp 2 jointly with the current capacity of fastening wire clamp 2 for investigating foundation.According to designing requirement, fastening wire clamp 2 must meet the current-carrying requirement of test, fastening wire clamp 2 is wider, and then more contact area is larger, the thickness of the holding screw bolt head of its restriction condition CT and lead-in wire, when fastening wire clamp 2 width is excessive, easily because the effect of current output line gravity comes off from bolt head.According to field experiment, when fastening wire clamp 2 width is more than 14mm, the fixed effect of fastening wire clamp 2 significantly will be affected.And the width of fastening wire clamp 2 and thickness also affect the fastening condition of the spacing arm of force simultaneously.That just requires while meeting current capacity requirement, reduces width and the thickness of fastening wire clamp as far as possible.
In view of the requirement of design object and the restrictive condition of three, finally determine spacing arm of force position very 6mm, 8mm, 10mm; Anchorage clip thickness is 1mm, 2mm, 3mm; Anchorage clip width is 10mm, 12mm, 14mm.
Pole, position table
According to optimum seeking table, by tabling look-up, determine to select L9 (3
4) orthogonal arrage arrangement orthogonal test, by carrying out analogue test the data obtained as shown in Table 1 in workshop, work area:
Table one
Test result analysis:
(1) directly observe:
Relatively 9 test accuracys rate, are up to No. 8 tests, relevance factor 100%.
(2) calculate:
First, I+II+III=789 with to test relevance factor sum 789 nine times equal, more known to each row contrast, and long 8mm is best for the spacing arm of force, and 3mm is best for anchorage clip thickness, and 12mm is best for anchorage clip width.
During use, be enclosed within by fastening wire clamp 2 on connected hex nut, holded up by the spacing arm of force 3, the openend of fastening wire clamp 2 tightens up, and fastening wire clamp 2 is fastening by hex nut, just can carry out rising test; After off-test, pressed by the spacing arm of force 3, the openend of fastening wire clamp 2 unclamps, and just fastening wire clamp 2 can be taken off.Structure is simple, easy to operate, greatly saves the time, improves operating efficiency.
Claims (8)
1. airtight switch cabinet one-time rising test wire clamp, comprise handle (1), handle (1) is provided with current line nose (12), current line nose (12) is fixedly connected with fastening wire clamp (2), it is characterized in that: described fastening wire clamp (2) is rhombus, the open side of described fastening wire clamp (2) is provided with press fastening device, described press fastening device comprises the spacing arm of force (3), the spacing arm of force (3) is connected with pull bar (4), pull bar (4) is socketed with spring (5), the top of the spacing arm of force (3) is fixed with depression bar (6).
2. airtight switch cabinet one-time rising test wire clamp according to claim 1, is characterized in that: the angle at wherein one group of diagonal angle of described rhombus is 120 °.
3. airtight switch cabinet one-time rising test wire clamp according to claim 2, is characterized in that: the diagonal angle that the angle ranging from 120 ° is positioned at the both sides of current line nose (12) extended line.
4. airtight switch cabinet one-time rising test wire clamp according to claim 1, is characterized in that: the described spacing arm of force (3) is for U-shaped.
5. airtight switch cabinet one-time rising test wire clamp according to claim 4, is characterized in that: described pull bar (4) is through the openend of fastening wire clamp (2); Described pull bar (4) is provided with locknut (9) through one end of fastening wire clamp (2); Described spring (5) is positioned at the openend of fastening wire clamp (2).
6. airtight switch cabinet one-time rising test wire clamp according to claim 5, is characterized in that: length (L)=8 ㎜ of the described spacing arm of force (3).
7. airtight switch cabinet one-time rising test wire clamp according to claim 1, is characterized in that: the making material of described fastening wire clamp (2) is copper sheet.
8. airtight switch cabinet one-time rising test wire clamp according to claim 7, is characterized in that: width (B)=12 ㎜ of described fastening wire clamp (2), thickness (T)=3 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210054369.1A CN102570327B (en) | 2012-03-05 | 2012-03-05 | Airtight switch cabinet one-time rising test wire clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210054369.1A CN102570327B (en) | 2012-03-05 | 2012-03-05 | Airtight switch cabinet one-time rising test wire clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102570327A CN102570327A (en) | 2012-07-11 |
| CN102570327B true CN102570327B (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210054369.1A Expired - Fee Related CN102570327B (en) | 2012-03-05 | 2012-03-05 | Airtight switch cabinet one-time rising test wire clamp |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319398B (en) * | 2014-06-17 | 2018-03-06 | 国网山西省电力公司电力科学研究院 | A kind of enclosed type termination of rising test line line nose |
| CN104931762B (en) * | 2015-06-04 | 2018-05-11 | 北京智罗盘智能电气有限公司 | It is a kind of can powered assembly and disassembly high-tension current pincers and its assembly and disassembly frock |
| CN107907774B (en) * | 2017-03-31 | 2019-12-24 | 国网浙江省电力公司湖州供电公司 | Electric leakage detection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0970405A (en) * | 1995-06-29 | 1997-03-18 | Kyocera Corp | Cerebral aneurysm clip |
| CN201548567U (en) * | 2009-10-10 | 2010-08-11 | 安徽省电力公司滁州供电公司 | Field calibration disposable test clamp of current transformer |
| CN202474617U (en) * | 2012-03-05 | 2012-10-03 | 青州市供电公司 | Wire clamp for primary current-boosting test of closed switch cabinets |
| CN203502439U (en) * | 2013-10-10 | 2014-03-26 | 平原县供电公司 | Spiral pressing type up-flow wire clamp |
-
2012
- 2012-03-05 CN CN201210054369.1A patent/CN102570327B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0970405A (en) * | 1995-06-29 | 1997-03-18 | Kyocera Corp | Cerebral aneurysm clip |
| CN201548567U (en) * | 2009-10-10 | 2010-08-11 | 安徽省电力公司滁州供电公司 | Field calibration disposable test clamp of current transformer |
| CN202474617U (en) * | 2012-03-05 | 2012-10-03 | 青州市供电公司 | Wire clamp for primary current-boosting test of closed switch cabinets |
| CN203502439U (en) * | 2013-10-10 | 2014-03-26 | 平原县供电公司 | Spiral pressing type up-flow wire clamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102570327A (en) | 2012-07-11 |
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Granted publication date: 20151202 Termination date: 20180305 |