CN107785675B - Temperature alarm type distribution transformer test short circuit device - Google Patents
Temperature alarm type distribution transformer test short circuit device Download PDFInfo
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- CN107785675B CN107785675B CN201610792735.1A CN201610792735A CN107785675B CN 107785675 B CN107785675 B CN 107785675B CN 201610792735 A CN201610792735 A CN 201610792735A CN 107785675 B CN107785675 B CN 107785675B
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- temperature
- permanent magnet
- hand
- copper
- circuit device
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000009826 distribution Methods 0.000 title claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 238000002788 crimping Methods 0.000 claims abstract description 20
- 239000003365 glass fiber Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims description 23
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 5
- 230000006386 memory function Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 229910052580 B4C Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
- H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/08—Short-circuiting members for bridging contacts in a counterpart
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/22—Connectors or connections adapted for particular applications for transformers or coils
Abstract
The invention discloses a temperature alarm type distribution transformer test short circuit device which comprises a permanent magnet insulating support, a high-temperature warning cap, an upper pressing plate, a lower pressing plate and a hand-screwed bolt, wherein a high-strength permanent magnet is arranged inside the permanent magnet insulating support, a glass fiber support is connected above the high-strength permanent magnet, the glass fiber support is wrapped by a composite umbrella skirt, the top of the glass fiber support is fixedly provided with a U-shaped support, the U-shaped support is respectively clamped above copper wires, the outer parts of the copper wires are wrapped by temperature-sensing insulating layers, three ends of the copper wires are respectively connected with a crimping head, the hand-screwed bolt penetrates through the crimping head, the hand-screwed bolt is connected between the upper pressing plate and the lower pressing plate, the high-temperature warning cap is inlaid above the outer part of the crimping head, a copper temperature guide barrel is arranged inside the high-temperature. Has the advantages that: besides the obvious automation effect, the device also has the advantages of convenience, rapidness, strong applicability, high accuracy, safety, reliability and the like.
Description
Technical Field
The invention relates to the field of power equipment quality supervision equipment design, in particular to a temperature alarm type distribution transformer test short-circuit device.
Background
In some transformer test projects, the transformer terminals are required to be terminated to form a short circuit loop for measurement. The short circuit device is a special wiring for short-circuiting each terminal and bearing short-circuit current. For example, in a direct current resistance test, an idle load test, a temperature rise test, and a short circuit endurance test of a transformer, the short-circuit device needs to withstand a current of several amperes to several hundreds or even thousands of amperes. In order to ensure the test safety and the accuracy of the test measurement result, the smaller the resistance and the contact resistance of the short-circuit device are, the better the short-circuit device is. However, the method commonly used is to wind a soft copper wire around the transformer terminal to form a short circuit loop. The disadvantages of this approach are very significant: one, unsafe. Manual winding does not have a unified standard, the winding firmness degree cannot be ensured, and the discharging accident is easily caused by the falling of the short-circuit device, so that the personal equipment safety is endangered. Secondly, it is inaccurate. When the short circuit device is wound, the contact resistance cannot be guaranteed, and the sectional area of a short circuit loop cannot be accurately measured, so that the resistance of the short circuit device cannot be guaranteed to influence the measurement result in a direct-current resistance and empty load test of a transformer within a controllable range. And thirdly, the operation is inconvenient. The method for tying the knot needs to be learned, and after the short-circuit device is tied, a dead knot is often formed easily, cannot be untied, and wastes time and labor. The fish mouth fork type short-circuit device is improved, the connection is firmer and safer, but inaccuracy and inaccuracy still existInconvenient situations: first, it is inaccurate. The fish mouth fork is connected with the inner side of the bayonet of the transformer conducting rod, and the contact area of the fish mouth fork is less than 20mm2And the device cannot bear large current and cannot ensure the measurement accuracy. Secondly, it is inconvenient. Need use the spanner during installation, cooperation bolt cap packing ring uses, and it is relatively troublesome during the installation. And thirdly, not applicable. Can not adapt to the terminals of two forms of bolt type and copper bar plate simultaneously. Although the two short-circuit devices are high in utilization rate, the problems of safety and accuracy of detection results cannot be solved all the time, and therefore the device capable of solving the problems is urgently needed, meanwhile, the device is more intelligent, more reasonable, stronger in applicability and convenient and fast to replace the two devices.
Disclosure of Invention
The invention aims to solve the problems and provide a temperature alarm type distribution transformer test short-circuit device.
The invention realizes the purpose through the following technical scheme:
the temperature warning type distribution transformer test short-circuit device comprises a permanent magnet insulating support, a high-temperature warning cap, an upper pressing plate, a lower pressing plate and a hand-screwed bolt, wherein a high-strength permanent magnet is arranged inside the permanent magnet insulating support, a glass fiber support is connected above the high-strength permanent magnet, the glass fiber support is wrapped by a composite umbrella skirt, the top of the glass fiber support is fixed with a U-shaped support, the U-shaped support is respectively clamped above a copper wire, the outer part of the copper wire is wrapped by a temperature-sensing insulating layer, the three ends of the copper wire are respectively connected with a crimping head, the hand-screwed bolt penetrates through the interior of the crimping head, the hand-screwed bolt is connected between the upper pressing plate and the lower pressing plate, the high-temperature warning cap is inlaid above the outer part of the crimping head, a copper temperature guide barrel is arranged inside the high-temperature warning cap, a compression spring is arranged inside the copper temperature, the ceramic cap is externally wrapped by an alloy ring.
In the structure, the original nut on the transformer wiring terminal does not need to be removed, the crimping connector can be directly sleeved on the wiring terminal or the wiring copper plate, the crimping strength of the upper pressure plate and the lower pressure plate is ensured to be constant by screwing the bolt by hands, the alloy ring has a temperature memory function, is in a contraction state at normal temperature, tightly hoops the ceramic cap, is integrally thinned and has an enlarged inner diameter according to shape memory during processing when the temperature reaches 110 ℃, the ceramic cap is released at the moment, is raised under the action of the compression spring to be in an alarm state, red pigment is doped during processing of the ceramic cap at the moment, the alarm is ensured to be more striking, meanwhile, the ceramic cap has the characteristics of temperature resistance and corrosion resistance, more importantly, the material has very small temperature expansion coefficient, and cannot jump and alarm due to high-temperature expansion of the ceramic cap, in addition, the upper pressure plate is provided with the high-temperature warning cap, and when the temperature exceeds 110 ℃, the high-temperature warning cap jumps up to expose a red warning part to remind an operator that the temperature of the pressure plate is too high, the test should be stopped, and the wiring is checked.
In order to further improve the detection effect, the copper line with the crimping head compresses tightly through the copper hoop and is connected, the top board with the bottom board passes through hand is screwed up the bolt and is screwed up the connection.
In order to further improve the detection effect, the high-strength permanent magnet is adhered above the glass fiber support, and the glass fiber support is adhered to the bottom of the U-shaped support.
In order to further improve the detection effect, the hand-screwed bolt is in threaded connection with the upper pressure plate, and the hand-screwed bolt is in threaded connection with the lower pressure plate.
In order to further improve the detection effect, the alloy ring hoops the ceramic cap, and the copper temperature conduction barrel is connected with the compression spring through adhesion.
Has the advantages that: besides the obvious automation effect, the device also has the advantages of convenience, rapidness, strong applicability, high accuracy, safety, reliability and the like.
Drawings
FIG. 1 is a spatial structure diagram of a temperature alarm type distribution test short-circuit device according to the present invention;
FIG. 2 is a partial schematic view of a permanent magnet insulation support of the temperature alarm type distribution transformer test short-circuit device according to the invention;
FIG. 3 is a partial schematic view of a high temperature warning cap of the temperature alarm type distribution test short-circuit device of the invention;
fig. 4 is a left side view of a lower pressing plate of the temperature alarm type distribution test short-circuit device.
The reference numerals are explained below:
1. a permanent magnet insulation support; 101. a high-strength permanent magnet; 102. a fiberglass strut; 103. a U-shaped bracket; 104. a composite umbrella skirt; 2. a temperature-sensitive insulating layer; 3. a copper wire; 4. a crimping head; 5. screwing the bolt by hand; 6. a high temperature warning cap; 601. an alloy ring; 602. a ceramic cap; 603. a copper heat conduction barrel; 604. a compression spring; 7. an upper pressure plate; 8. and (5) pressing the plate downwards.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-4, the temperature warning type distribution transformer test short circuit device comprises a permanent magnet insulation support 1, a high temperature warning cap 6, an upper pressing plate 7, a lower pressing plate 8 and a hand-screwed bolt 5, wherein a high-strength permanent magnet 101 is arranged inside the permanent magnet insulation support 1, the high-strength permanent magnet 101 plays an insulating role, a glass fiber support 102 is connected above the high-strength permanent magnet 101, the glass fiber support 102 also plays insulating and non-conducting roles, the glass fiber support 102 is wrapped by a composite umbrella skirt 104, a U-shaped support 103 is fixed on the top of the glass fiber support 102, the U-shaped support 103 is used for clamping a temperature-sensitive insulation layer 2, the U-shaped support 103 is respectively clamped above a copper wire 3, the copper wire 3 is externally wrapped by the temperature-sensitive insulation layer 2, the temperature-sensitive insulation layer 2 also plays insulating and non-conducting roles, three ends of the copper wire 3 are respectively connected to a crimping head 4, and the crimping head, the hand-screwed bolt 5 penetrates through the interior of the crimping head 4, the hand-screwed bolt 5 has the function of crimping an upper pressure plate 7 and a lower pressure plate 8, the hand-screwed bolt 5 is connected between the upper pressure plate 7 and the lower pressure plate 8, a high-temperature warning cap 6 is inlaid above the exterior of the crimping head 4, the high-temperature warning cap 6 is an accessory of the upper pressure plate 7 and has the function of temperature warning, a copper temperature-conducting barrel 603 is arranged in the high-temperature warning cap 6 and has the functions of heat insulation and internal element protection, a compression spring 604 is arranged in the copper temperature-conducting barrel 603 and has the function of jacking a ceramic cap 602 in a heating state, the ceramic cap 602 is actually a B4C boron carbide ceramic cap and has the functions of insulation and heat insulation, the ceramic cap 602 is connected in a direction perpendicular to the compression spring 604, the exterior of the ceramic cap 602 is wrapped by an alloy ring 601, the alloy ring 601 is a nickel-titanium alloy ring and has the function of temperature memory, the ceramic cap 602 is tightly tightened at normal temperature, and when the temperature reaches 110 ℃, the whole body becomes thinner and the inner diameter is enlarged according to the shape memory during processing.
In the structure, the original nut on the transformer wiring terminal does not need to be removed, the crimping connector 4 can be directly sleeved on the wiring terminal or a wiring copper plate, the bolt 5 is screwed by hands at the moment to ensure that the crimping strength of the upper pressing plate 7 and the lower pressing plate 8 is constant, the alloy ring 601 has a temperature memory function, is in a tightening state at normal temperature, tightly hoops the ceramic cap 602, and when the temperature reaches 110 ℃, the whole thinning and the inner diameter expansion are realized according to the shape memory during processing. At this moment, the ceramic cap 602 can be released, the protrusion is under the action of the compression spring 604, the alarm state is presented, red pigment is doped when the ceramic cap 602 is processed in the machining process at this moment, the alarm is more striking when the alarm is ensured, meanwhile, the ceramic cap 602 has the temperature-resistant and corrosion-resistant characteristics, more importantly, the temperature expansion coefficient of the material is very small, the alarm can not jump up due to the high-temperature expansion of the ceramic cap 602, in addition, the upper pressure plate 7 is provided with the high-temperature alarm cap 6, the high-temperature alarm cap 6 jumps up when the temperature exceeds 110 ℃, the red alarm part is exposed, the temperature of the pressure plate is reminded to operators to be too high, the test is stopped.
In order to further improve the detection effect, the copper wire 3 is connected with the pressure joint 4 in a compression mode through a copper hoop, the upper pressing plate 7 is connected with the lower pressing plate 8 in a tightening mode through a hand-screwed bolt 5, the high-strength permanent magnet 101 is adhered above the glass fiber strut 102, the glass fiber strut 102 is adhered to the bottom of the U-shaped support 103, the hand-screwed bolt 5 is connected with the upper pressing plate 7 through threads, the hand-screwed bolt 5 is connected with the lower pressing plate 8 through threads, the alloy ring 601 hoops the ceramic cap 602, and the copper temperature guide barrel 603 is connected with the compression spring 604 in an adhesion mode.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. Temperature warning type distribution transformer test short circuit device, its characterized in that: comprises a permanent magnet insulating bracket, a high-temperature warning cap, an upper pressure plate, a lower pressure plate and a hand-screwed bolt, wherein a high-strength permanent magnet is arranged in the permanent magnet insulating bracket, a glass fiber strut is connected above the high-strength permanent magnet and is wrapped by the composite umbrella skirt, the top of the glass fiber strut is fixed with a U-shaped bracket which is respectively clamped above the copper wires, the outer part of the copper wire is wrapped by a temperature-sensitive insulating layer, three ends of the copper wire are respectively connected with a crimping head, the hand-screwed bolt penetrates through the interior of the crimping head, the hand-screwed bolt is connected between the upper pressure plate and the lower pressure plate, the high-temperature warning cap is embedded above the outer part of the pressure joint, a copper temperature conduction barrel is arranged in the high-temperature warning cap, a compression spring is arranged in the copper temperature conduction barrel, a ceramic cap is arranged outside the compression spring, and the outside of the ceramic cap is wrapped by an alloy ring; the alloy ring is a nickel-titanium alloy ring, has a temperature memory function, is in a contraction state at normal temperature, tightly hoops the ceramic cap, and becomes thinner and has an enlarged inner diameter according to shape memory during processing when the temperature reaches 110 ℃.
2. The temperature alarm type distribution test short-circuit device according to claim 1, characterized in that: the copper line with the crimping head compresses tightly through the copper hoop and is connected, the top board with the bottom board passes through the hand is screwed up the bolt and is screwed up the connection.
3. The temperature alarm type distribution test short-circuit device according to claim 1, characterized in that: the high-strength permanent magnet is adhered to the lower portion of the glass fiber support, and the glass fiber support is adhered to the bottom of the U-shaped support.
4. The temperature alarm type distribution test short-circuit device according to claim 1, characterized in that: the hand-screwed bolt is connected with the upper pressure plate through threads, and the hand-screwed bolt is connected with the lower pressure plate through threads.
5. The temperature alarm type distribution test short-circuit device according to claim 1, characterized in that: the copper temperature conduction barrel is connected with the compression spring through adhesion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792735.1A CN107785675B (en) | 2016-08-31 | 2016-08-31 | Temperature alarm type distribution transformer test short circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792735.1A CN107785675B (en) | 2016-08-31 | 2016-08-31 | Temperature alarm type distribution transformer test short circuit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107785675A CN107785675A (en) | 2018-03-09 |
| CN107785675B true CN107785675B (en) | 2021-02-12 |
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ID=61451611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610792735.1A Active CN107785675B (en) | 2016-08-31 | 2016-08-31 | Temperature alarm type distribution transformer test short circuit device |
Country Status (1)
| Country | Link |
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| CN (1) | CN107785675B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0963356A (en) * | 1995-08-16 | 1997-03-07 | Furukawa Electric Co Ltd:The | Wire harness |
| CN201252155Y (en) * | 2008-09-05 | 2009-06-03 | 江阴兴澄特种钢铁有限公司 | Short-circuit tool of wire connecting terminal |
| CN201766270U (en) * | 2010-08-04 | 2011-03-16 | 芜湖明远电力设备制造有限公司 | Tool for quickly short connecting current terminal |
| CN202183547U (en) * | 2011-08-02 | 2012-04-04 | 鸡西电业局 | Combined multifunctional current short-circuit device |
| CN202513420U (en) * | 2012-04-09 | 2012-10-31 | 山东电力集团公司临沂供电公司 | Short-circuit line special for test in high voltage circuit breaker |
| CN203387028U (en) * | 2013-07-04 | 2014-01-08 | 国家电网公司 | Shorting device for shorting current terminal |
| CN204101594U (en) * | 2014-08-04 | 2015-01-14 | 许昌县电业公司 | Can the short jumper device of telescopic adjustment short circuit spacing voluntarily |
| CN204858223U (en) * | 2015-07-24 | 2015-12-09 | 国网山东新泰市供电公司 | Novel transformer capacity test three -phase short -circuit connector |
| CN205141337U (en) * | 2015-12-10 | 2016-04-06 | 国网四川省电力公司达州供电公司 | It is experimental with flash of light warning shorting stub |
| CN206057474U (en) * | 2016-09-06 | 2017-03-29 | 国网山东省电力公司淄博供电公司 | Short-circuit device is tested in the distribution transforming of temperature warning type |
-
2016
- 2016-08-31 CN CN201610792735.1A patent/CN107785675B/en active Active
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| CN107785675A (en) | 2018-03-09 |
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