CN110247324B - Wire clamp critical heating electrified treatment device - Google Patents
Wire clamp critical heating electrified treatment device Download PDFInfo
- Publication number
- CN110247324B CN110247324B CN201910520769.9A CN201910520769A CN110247324B CN 110247324 B CN110247324 B CN 110247324B CN 201910520769 A CN201910520769 A CN 201910520769A CN 110247324 B CN110247324 B CN 110247324B
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- Prior art keywords
- chuck
- contact finger
- disconnecting link
- link contact
- screw rod
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Clamps And Clips (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention relates to a wire clamp critical heating electrified treatment device. The method is characterized in that: the device comprises a connecting screw rod (3), wherein an upper chuck (2) and a lower chuck (6) are respectively and fixedly arranged on the connecting screw rod (3), the upper chuck (2) and the lower chuck (6) are U-shaped plates and are parallel to each other, a left-side disconnecting link contact finger (7) is arranged in the middle of the left sides of the upper chuck (2) and the lower chuck (6), a right-side disconnecting link contact finger is arranged in the middle of the right sides of the upper chuck (2) and the lower chuck (6), the upper end and the lower end of the left-side disconnecting link contact finger (7) are respectively connected with the upper chuck (2) and the lower chuck (6) through elastic elements, and the upper end and the lower end of the right-side disconnecting link contact finger are also respectively connected with the upper chuck (2) and the lower chuck (6) through the elastic elements; also comprises an L-shaped mounting screw rod (4). The device can be used for carrying out heating of the wire clamp of the electrified treatment equipment, thereby avoiding switching operation and reducing maintenance time.
Description
Technical Field
The invention relates to a wire clamp critical heating electrified treatment device.
Background
The wire clamp generates heat and is a common fault of transformer substation equipment, and the phenomena of poor contact, corrosion and aging of the equipment are quite common along with the lengthening of the operation life, so that the occurrence probability of the heat generating fault is increased continuously. If the heating fault of the wire clamp is not handled in time, the heating fault can be finally developed into critical heating, deformation and burning of equipment can be possibly caused, and the safe and stable operation of a transformer substation is seriously threatened. For example, in the operation and maintenance transformer substation governed by a maintenance company in a certain province at present, most of the transformer substation runs for more than 10 years, equipment rust and aging phenomena are serious, and wire clamp heating faults occur. 4 crisis heating faults occur in a 330kV transformer substation governed by a company 5 months in 2016. According to statistics of heating faults of 25 substations in nearly three years, the heating faults of 220kV and below are found to account for more than 70%, namely equipment under the voltage level is easy to generate heat, and potential safety hazards are formed.
According to the conventional mode, the power failure treatment is adopted after the equipment wire clamp heats. Through statistics of a plurality of critical heating treatment conditions of the governed transformer stations, the average time of power failure treatment is about 4 hours when only equipment is powered off, and the average time of power failure treatment is about 1.5 hours. The whole critical heating treatment time is up to approximately 5.5 hours. Therefore, the situation that the equipment generates heat in the wire clamp is quite serious, and in order to rapidly treat the heat-generating fault and solve the problem of accident expansion caused by critical heat generation, it is necessary to develop a device capable of realizing the wire clamp heat generation condition of the electrified processing equipment.
Disclosure of Invention
The invention aims to provide a wire clamp critical heating electrified treatment device which can be used for electrified treatment of the heating condition of equipment wire clamps, avoid switching operation and reduce maintenance time.
The utility model provides a wire clamp critical heating electrified processing apparatus which characterized in that: the device comprises a connecting screw, wherein an upper chuck and a lower chuck are respectively and fixedly arranged on the connecting screw, the upper chuck and the lower chuck are U-shaped plates and are parallel to each other, a left disconnecting link contact finger is arranged between the left sides of the upper chuck and the lower chuck, a right disconnecting link contact finger is arranged between the right sides of the upper chuck and the lower chuck, the upper end and the lower end of the left disconnecting link contact finger are respectively connected with the upper chuck and the lower chuck through elastic elements, and the upper end and the lower end of the right disconnecting link contact finger are also respectively connected with the upper chuck and the lower chuck through the elastic elements; the insulating operation rod further comprises an L-shaped mounting screw, one end of the L-shaped mounting screw is fixedly connected with the connecting screw, and the other end of the L-shaped mounting screw is detachably connected with the top end of the insulating operation rod through a fastener.
The front parts of the left disconnecting link contact finger and the right disconnecting link contact finger are outwards bent to form an arc shape, and the connecting sections in the middle of the left disconnecting link contact finger and the right disconnecting link contact finger are flexibly connected.
Wherein the flexible connection means connection through wires.
The front parts of the upper end and the lower end of the left disconnecting link contact finger are connected with the upper chuck and the lower chuck through top springs, and the rear parts of the upper end and the lower end of the left disconnecting link contact finger are connected with the upper chuck and the lower chuck through tension springs; the front parts of the upper end and the lower end of the right disconnecting link contact finger are connected with the upper chuck and the lower chuck through top springs, and the rear parts of the upper end and the lower end of the right disconnecting link contact finger are connected with the upper chuck and the lower chuck through tension springs.
The device adopts a simple shunt principle, increases the contact surface between the wire clamps by using external force, reduces the contact resistance (heating caused by loosening of a wire clamp screw which generally occurs) and enables a part of current passing between the two wire clamps to pass through the shunt device, thereby reducing the current directly passing through the wire clamps and simultaneously reducing the heating temperature of the wire clamps of the equipment. The device can be used for carrying out heating of the wire clamp of the electrified treatment equipment, thereby avoiding switching operation and reducing maintenance time. The tail part of the device adopts a bolt fixing mode, and is applicable to wire clamps and wires with various thicknesses and diameters, a spring is arranged between a press contact finger and an external fixing steel piece, the contact finger pressing force is increased, excellent electrical performance is achieved, and meanwhile, the current carrying capacity of the shunt device is increased due to the design of double contact fingers.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, the invention provides a wire clamp critical heating electrified treatment device, which comprises a connecting screw rod 3, wherein an upper chuck 2 and a lower chuck 6 are respectively and detachably arranged on the connecting screw rod 3 in a threaded mode, the distance between the upper chuck 2 and the lower chuck 6 is adjustable, the two horizontal U-shaped plates are respectively in a horizontal U-shaped plate, the two horizontal U-shaped plates are identical in size and shape and are parallel to each other, and the connecting screw rod 3 respectively penetrates through and is connected with the middle joint of the two U-shaped plates.
A left knife switch contact finger 7 in a U shape is arranged in the middle of the left sides of the upper clamping head 2 and the lower clamping head 6, a right knife switch contact finger in a U shape is arranged in the middle of the right sides of the upper clamping head 2 and the lower clamping head 6, the upper end (plate outer wall) and the lower end (plate outer wall) of the left knife switch contact finger 7 are respectively connected with the upper clamping head 2 (plate inner wall) and the lower clamping head 6 (plate inner wall) through elastic elements, and the upper end (plate outer wall) and the lower end (plate outer wall) of the right knife switch contact finger are respectively connected with the upper clamping head 2 (plate inner wall) and the lower clamping head 6 (plate inner wall) through elastic elements; the device also comprises an L-shaped mounting screw 4, one end of the L-shaped mounting screw 4 is fixedly connected with the middle part of the connecting screw 3, and the other end of the L-shaped mounting screw is detachably connected with the top end of the 200KV insulating operating rod through a fastener such as a screw thread.
In addition, the opening parts of the left side disconnecting link contact finger 7 and the right side disconnecting link contact finger are outwards bent to form an arc shape, and the connecting sections between the left side disconnecting link contact finger 7 and the right side disconnecting link contact finger are soft connection, wherein the soft connection is connected through a plurality of copper or aluminum wires.
The front parts of the upper end and the lower end of the left disconnecting link contact finger 7 are connected with the upper chuck 2 and the lower chuck 6 through the top spring 1, and the rear parts of the upper end and the lower end of the left disconnecting link contact finger 7 are connected with the upper chuck 2 and the lower chuck 6 through the tension spring 5; the front parts of the upper end and the lower end of the right knife switch contact finger are connected with the upper clamping head 2 and the lower clamping head 6 through the top spring 1, and the rear parts of the upper end and the lower end of the right knife switch contact finger are connected with the upper clamping head 2 and the lower clamping head 6 through the tension spring 5.
Example 1:
The implementation of the system and method is described in detail below with reference to the accompanying drawings.
1. And (5) assembling the device.
The components are assembled according to fig. 1.
(1) A finger portion.
The contact finger part adopts the disconnecting link contact finger as a contact part, so that the contact resistance between the device and the wire clamp can be effectively reduced. The stability of the device can be improved by adopting the double contact fingers. The rear parts of the upper contact finger and the lower contact finger are connected by a copper flexible connection, and the flexible connection can be selected according to the current of the wire clamp; the contact fingers are connected with the steel plates through springs, the front parts of the contact fingers are provided with the top springs 1, the rear parts of the contact fingers are provided with the tension springs 5, the distance between the contact fingers is narrow, the front parts and the rear parts of the contact fingers are wide, the grabbing force of the device can be effectively improved, meanwhile, the damping effect can be achieved, and the stability of the device is improved.
(2) A screw portion.
The screw adopts a full-wire screw, can be reliably connected and fixed with the steel plate through a nut, and can adjust the distance between the contact fingers according to the thickness of the equipment; the device is fixed by adopting a U-shaped steel plate.
(3) And a clamping structure.
The clamping structure adopts double chucks, the clamping force is enough, the contact length is not less than 70% of the width of the device, the thickness is 3-4mm, the horizontal length is not less than 10cm, the opening length is 3-3.5cm, the distance is 4.5-5.5cm, the connecting screw 3 is 4.5 x 45mm, the pin is 10 x 10mm, the stability is higher, the installation is easier, and the shock resistance is high. The clamping material is a stainless steel plate with the compression resistance in the range of 150-200kg/cm < 2 >. The conductive performance is better, the performance is stable, the performance is not obviously changed at high and low temperatures, and the oxidation resistance is strong.
(4) And a connection structure.
The connecting structure adopts contact connection, the installation and separation are easier, the force transmission is enough, the connection stability is moderate, the manufacturing cost is low, the screw size is 20mm x 8cm, and the sleeve size is 24mm x 7cm. The transmission material is a special 220kV operating rod, and is connected by additionally installing screw threads, so that the transmission material cannot be loosened after being installed, has high stability and can meet the requirement of 5.1 m high-altitude operation.
(5) And (3) a steel plate.
The steel plate has high hardness and can play a good role in fixing, and the steel plate is designed into a U shape, so that on one hand, bolts on a wire clamp can be avoided, meanwhile, the weight of the device can be reduced, and the operation difficulty is reduced; the whole connection adopts the long screw rod to be capable of being connected with the operating rod, so that the device is not easy to drop, the U-shaped steel ring is added at the lower part, and a contact point is added, so that the operation is easier.
2. And (5) detecting device performance.
The device has the following performance tests before use:
(1) And testing the resistance value between the contact fingers: the test value is less than 50 mu omega, and meets the requirement;
(2) Withstand voltage test: the whole body has no breakdown to the ground 440kV withstand voltage test for 1min, and meets the requirements;
(3) Clamping force test: the weight of the clamping joint is 2.5kg, the effective clamping force between the single contact fingers is 45N, and the double contact fingers can reach 90N, so that the clamping joint can be ensured not to fall off under the influence of environmental factors such as strong wind after being installed;
(4) Moment measurement: taking the height of 220kV equipment as an example, the arm strength of an adult man is about 700N, the operable length of an operating rod is 0.8 m, the weight of a clamping joint is 2.5kg, the weight of the operating rod is 4kg, the clamping force between joints is 90N, the device can work at a height of 5.1 m through the calculation of a moment formula, the height of 220kV equipment in a station generally cannot exceed 5m, the safety distance of 220kV live working is 1.8 m, and the requirement of high-altitude operation at 220kV equipment is met.
(5) In-situ live testing: the maintainer heats the equipment wire clamp of the 35kV voltage transformer of a certain transformer substation and uses the device to carry out field treatment. Firstly, infrared accurate temperature measurement is used for confirming the heating point position; step two, adjusting the tail nut of the shunt joint to enable the gap between the upper contact finger and the lower contact finger of the shunt joint to meet the field use requirement; thirdly, assembling a connecting and transmitting device, clamping the shunt joint on a heating point (equipment wire clamp), and confirming that the installation is reliable; and fourthly, continuously observing through infrared accurate temperature measurement, recording, and observing whether the temperature of the heating point is reduced.
Claims (1)
1. The utility model provides a wire clamp critical heating electrified processing apparatus which characterized in that: the device comprises a connecting screw rod (3), wherein an upper chuck (2) and a lower chuck (6) are respectively and fixedly arranged on the connecting screw rod (3), the upper chuck (2) and the lower chuck (6) are U-shaped plates and are parallel to each other, a left-side disconnecting link contact finger (7) is arranged in the middle of the left sides of the upper chuck (2) and the lower chuck (6), a right-side disconnecting link contact finger is arranged in the middle of the right sides of the upper chuck (2) and the lower chuck (6), the upper end and the lower end of the left-side disconnecting link contact finger (7) are respectively connected with the upper chuck (2) and the lower chuck (6) through elastic elements, and the upper end and the lower end of the right-side disconnecting link contact finger are also respectively connected with the upper chuck (2) and the lower chuck (6) through the elastic elements; the device also comprises an L-shaped mounting screw rod (4), wherein one end of the L-shaped mounting screw rod (4) is fixedly connected with the connecting screw rod (3), and the other end of the L-shaped mounting screw rod is detachably connected with the top end of the insulating operating rod through a fastener;
The front parts of the left disconnecting link contact finger (7) and the right disconnecting link contact finger are outwards bent to form an arc shape, and the connecting sections in the middle of the left disconnecting link contact finger (7) and the right disconnecting link contact finger are flexibly connected;
wherein the soft connection is connected through a wire;
the front parts of the upper end and the lower end of the left disconnecting link contact finger (7) are connected with the upper chuck (2) and the lower chuck (6) through a top spring (1), and the rear parts of the upper end and the lower end of the left disconnecting link contact finger (7) are connected with the upper chuck (2) and the lower chuck (6) through a tension spring (5); the front parts of the upper end and the lower end of the right knife switch contact finger are connected with the upper chuck (2) and the lower chuck (6) through a top spring (1), and the rear parts of the upper end and the lower end of the right knife switch contact finger are connected with the upper chuck (2) and the lower chuck (6) through a tension spring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520769.9A CN110247324B (en) | 2019-06-17 | 2019-06-17 | Wire clamp critical heating electrified treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520769.9A CN110247324B (en) | 2019-06-17 | 2019-06-17 | Wire clamp critical heating electrified treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110247324A CN110247324A (en) | 2019-09-17 |
| CN110247324B true CN110247324B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910520769.9A Active CN110247324B (en) | 2019-06-17 | 2019-06-17 | Wire clamp critical heating electrified treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110247324B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917668U (en) * | 2012-08-10 | 2013-05-01 | 国家电网公司 | Live-line processing apparatus for heating due to failed contact of equipment wiring board and current leading wire clamp |
| CN202997413U (en) * | 2012-11-21 | 2013-06-12 | 福建省电力有限公司 | Electrified treatment tool for wire clamp heating strip |
| CN203674595U (en) * | 2014-01-23 | 2014-06-25 | 国家电网公司 | Live-line emergency processing short-circuit parallel connecting device for eliminating heating of electric transmission and transformation equipment cable clamp |
| CN106921119A (en) * | 2015-12-24 | 2017-07-04 | 国家电网公司 | The emergent electrical treatment device of high voltage isolator edge of a knife heating |
| CN109148174A (en) * | 2017-06-19 | 2019-01-04 | 陕西秦能电力科技股份有限公司 | A kind of electrical contact |
| CN209963608U (en) * | 2019-06-17 | 2020-01-17 | 国网宁夏电力有限公司检修公司 | Wire clamp emergency heating live processing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10427360B2 (en) * | 2016-03-14 | 2019-10-01 | Federal-Mogul Powertrain Llc | Tool for fixing a textile sleeve about an elongate member to be protected and method of fixing a protective textile sleeve about an elongate member |
-
2019
- 2019-06-17 CN CN201910520769.9A patent/CN110247324B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917668U (en) * | 2012-08-10 | 2013-05-01 | 国家电网公司 | Live-line processing apparatus for heating due to failed contact of equipment wiring board and current leading wire clamp |
| CN202997413U (en) * | 2012-11-21 | 2013-06-12 | 福建省电力有限公司 | Electrified treatment tool for wire clamp heating strip |
| CN203674595U (en) * | 2014-01-23 | 2014-06-25 | 国家电网公司 | Live-line emergency processing short-circuit parallel connecting device for eliminating heating of electric transmission and transformation equipment cable clamp |
| CN106921119A (en) * | 2015-12-24 | 2017-07-04 | 国家电网公司 | The emergent electrical treatment device of high voltage isolator edge of a knife heating |
| CN109148174A (en) * | 2017-06-19 | 2019-01-04 | 陕西秦能电力科技股份有限公司 | A kind of electrical contact |
| CN209963608U (en) * | 2019-06-17 | 2020-01-17 | 国网宁夏电力有限公司检修公司 | Wire clamp emergency heating live processing device |
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| Publication number | Publication date |
|---|---|
| CN110247324A (en) | 2019-09-17 |
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