CN111342377B - Maintenance tool and maintenance method for replacing anchor ear of ALSTOM isolating switch without power failure - Google Patents
Maintenance tool and maintenance method for replacing anchor ear of ALSTOM isolating switch without power failure Download PDFInfo
- Publication number
- CN111342377B CN111342377B CN202010126920.3A CN202010126920A CN111342377B CN 111342377 B CN111342377 B CN 111342377B CN 202010126920 A CN202010126920 A CN 202010126920A CN 111342377 B CN111342377 B CN 111342377B
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- anchor ear
- hoop
- alstom
- power failure
- clamp
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012423 maintenance Methods 0.000 title claims description 9
- 230000007704 transition Effects 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims description 14
- 230000008439 repair process Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005570 vertical transmission Effects 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses an overhaul fixture and an overhaul method for replacing a hoop of an ALSTOM isolating switch without power failure, comprising a transition plate, an upper end clamp and a lower end clamp, wherein the transition plate is provided with a hoop replacement window, the hoop replacement window is used for dismantling a hoop to be replaced and installing a new hoop, the transition plate is fixedly connected with the upper end clamp at the upper end of the hoop replacement window, the upper end clamp is clamped on a vertical connecting rod at the upper end of a knife switch mechanism, the transition plate is fixedly connected with the lower end clamp at the lower end of the hoop replacement window, and the lower end clamp is clamped on an output shaft with the knife switch mechanism. The invention can realize the replacement of the anchor ear under the running state of the equipment, saves the power failure cost, generates great economic benefit, greatly shortens the completion time of the replacement work under the condition of ensuring the normal running of the equipment, saves great labor cost, and adopts the anchor ear with adjustable diameter to cope with the vertical connecting rods with different pipe diameters.
Description
Technical Field
The invention relates to the field of power grid overhaul, in particular to an overhaul tool and an overhaul method for replacing a hoop of an ALSTOM isolating switch without power failure.
Background
The actuating mechanism output shaft and the vertical transmission connecting rod of the outdoor high-voltage isolating switch commonly used in the transformer substation at present are connected through the anchor ear, and the torque output by the mechanism acts on the anchor ear for a long time, because the traditional anchor ear only tightly holds the connecting rod through the locking pressure of a bolt, under the effect of the long-time repeated positive and negative rotation high torque, the phenomenon of sliding off easily occurs, and then the hidden danger that the disconnecting link is not opened and closed in place is caused. Solves this kind of hidden danger can be through punching on the staple bolt, increase a through bolt, lock the staple bolt and be connected with the connecting rod, but through experimental investigation discovers that the used staple bolt of former producer is cast aluminum alloy part mostly, and is relatively poor because of the great toughness of cast aluminium silicon content, and it is bigger through long-time weathering hard brittleness, and direct punching causes the staple bolt fracture easily, has bigger potential safety hazard to the operation safety, and direct punching is unfavorable. The novel anchor ear is manufactured by adopting 6061 type extrusion type aluminum alloy, the toughness strength of the aluminum alloy is higher, the oxidation resistance and the corrosion resistance are very strong, and the aluminum alloy is the most commonly used high-quality aluminum alloy for power accessories; in the novel anchor ear precast bolt hole, a stainless steel positioning bolt pin with a locking nut is arranged.
The novel prefabricated anchor ear is required to be combined with power failure maintenance to finish transformation in the power grid anti-accident measure, but the stock of the isolating switch in operation is huge, the operation of the power grid is realistic, the anchor ear cannot be sequentially replaced in a short time in a power failure mode, some anchor ears cannot be replaced even in a power failure mode, and the task of completely finishing the anti-accident measure is remote and indefinite.
Disclosure of Invention
The invention provides an overhaul fixture for replacing a hoop of an ALSTOM isolating switch without power failure, which realizes the replacement of the hoop without power failure.
The invention also provides an overhauling method for replacing the anchor ear of the ALSTOM isolating switch without power failure.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an ALSTOM isolator does not have a power failure and changes frock of staple bolt, includes transition board, upper end anchor clamps and lower extreme anchor clamps, the transition board is opened has the staple bolt to change the window, the staple bolt is changed the window and is used for demolishing and wait to change the staple bolt and install new staple bolt, the transition board is at the upper end and the upper end anchor clamps fixed connection of staple bolt change the window, upper end anchor clamps clamp in the perpendicular connecting rod of switch mechanism upper end, the transition board is at the lower extreme and the lower extreme anchor clamps fixed connection of staple bolt change the window, lower extreme anchor clamps and switch mechanism clamp in the output shaft, transition board, upper end anchor clamps and lower extreme anchor clamps all use aluminum alloy material to make.
Preferably, the upper end clamp is an adjustable diameter anchor ear, and the adjustable diameter anchor ear is applicable to vertical connecting rods with different diameters.
Preferably, the diameter adjustment range of the diameter-adjustable hoop is 40mm-80mm.
Preferably, the transition plate is provided with a plurality of connecting bolt holes at the upper end of the anchor ear replacement window, and the upper section clamp is fixedly connected with the transition plate through the bolt holes and bolts.
Preferably, the transition plate is provided with a plurality of connecting bolt holes at the upper end of the anchor ear replacement window.
Preferably, the transition plate is provided with a plurality of screw holes at the lower end of the hoop replacement window, and the lower end clamp is fixedly connected to the transition plate through the screw holes.
Preferably, the lower end clamp is a stop bolt, and is suitable for various opposite output shafts, and the stop bolt can assist in realizing charged fine adjustment of the isolating switch, so that the isolating switch is switched on and off in place.
Preferably, the transition plate is provided with six screw holes at the lower end of the hoop replacement window.
Preferably, the number of the stop bolts is four, one stop bolt corresponds to one of six screw holes, and a proper screw hole is selected according to the size of the lower end mechanism, so that when the isolating disconnecting link is not in place in a closing process or is not in place in a separating process, the position of a contact of the electrified fine-tuning disconnecting link can be realized through the assistance of the adjusting nut, and the disconnecting link is in place in a separating and closing process.
An overhaul method for replacing a hoop of an ALSTOM disconnecting switch without power outage, which is applied to the overhaul tool of any one of claims 1 to 9, and comprises the following steps:
s1: the upper end of the special tool is tightly held at a proper position of a vertical connecting rod at the upper part of the anchor ear, and the lower end of the special tool is fixed on a flange of the mechanism output, so that the mechanism output flange is tightly connected with the vertical connecting rod through the special tool;
s2: marking the original positions of the vertical connecting rod and the mechanism flange of the fixed tool by using a marker pen, removing the original anchor ear, installing a new anchor ear with a locating pin back to the mechanism, and locking the new anchor ear according to the required moment;
s3: after the new anchor ear is locked, the special tool is dismantled, the mark is observed, and no displacement between the mechanism flange and the vertical connecting rod is ensured again, so that the isolating switch can normally operate.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention can realize the replacement of the anchor ear under the running state of equipment, saves the power failure cost, generates great economic benefit, adopts the aluminum alloy material with excellent performance, is light and durable, has simple structure, is convenient and quick to disassemble, only needs 20 minutes to replace one anchor ear, greatly shortens the completion time of replacement work under the condition of ensuring the normal running of the equipment, saves great labor cost, and adopts the anchor ear with adjustable diameter to cope with the vertical connecting rods with different pipe diameters.
Drawings
Fig. 1 is a schematic diagram of an overhaul fixture for replacing a hoop of an ALSTOM isolating switch without power failure.
Fig. 2 is a front view of an repair fixture for replacing a hoop of an ALSTOM disconnector without power outage.
Fig. 3 is a side view of an repair fixture for replacement of a staple bolt of an ALSTOM disconnector without power outage.
Fig. 4 is a top view of an repair fixture for replacing a hoop of an ALSTOM disconnector without power outage.
Fig. 5 is a schematic flow chart of a method for repairing an ALSTOM isolating switch without power failure by replacing a hoop.
In the figure, 1 is a transition plate, 11 is a connecting bolt hole, 12 is a screw hole, 2 is an upper end clamp, 3 is a lower end clamp, 4 is a hoop replacement window, 5 is a hoop to be replaced, 6 is a vertical connecting rod, 7 is a disconnecting link mechanism, and 8 is an output shaft.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
This embodiment provides an maintenance frock of anchor ear is changed to ALSTOM isolator uninterrupted power supply, like fig. 1 through 4, including transition board 1, upper end anchor clamps 2 and lower extreme anchor clamps 3, transition board 1 opens has anchor ear to change window 4, anchor ear to change window 4 and be used for demolishing and wait to change anchor ear 5 and install new anchor ear, transition board 1 is at the upper end and the upper end anchor clamps 2 fixed connection of anchor ear to change window 4, upper end anchor clamps 2 clamp in the perpendicular connecting rod 6 of 7 upper ends of switch mechanism, transition board 1 is at the lower extreme and the 3 fixed connection of lower extreme anchor clamps 3 of anchor ear to change window 4, lower extreme anchor clamps 3 and switch mechanism 7 clamp in output shaft 8.
The upper end clamp 2 is an adjustable diameter type hoop.
The diameter adjustment range of the diameter-adjustable hoop is 40mm-80mm.
The transition plate 1 is provided with a plurality of connecting bolt holes 11 at the upper end of the anchor ear replacement window 4, and the upper clamp is fixedly connected with the transition plate 1 through the bolt holes and bolts.
The transition plate 1 is provided with a plurality of connecting bolt holes 11 at the upper end of the anchor ear replacement window 4.
The transition plate 1 is provided with a plurality of screw holes 12 at the lower end of the anchor ear replacement window 4, and the lower end clamp 3 is fixedly connected to the transition plate 1 through the screw holes 12.
The lower end clamp 3 is a stop bolt.
The transition plate 1 is provided with six screw holes 12 at the lower end of the anchor ear replacement window 4.
The number of the stop bolts is four, and one stop bolt corresponds to one of six screw holes 12.
In a specific implementation process, an overhaul method for replacing a hoop of an ALSTOM isolating switch without power outage is shown in fig. 5, and the overhaul method is applied to the overhaul fixture according to any one of claims 1 to 9, and comprises the following steps:
s1: the upper end of the special tool is tightly held at a proper position of a vertical connecting rod at the upper part of the anchor ear, and the lower end of the special tool is fixed on a flange of the mechanism output, so that the mechanism output flange is tightly connected with the vertical connecting rod through the special tool;
s2: marking the original positions of the vertical connecting rod and the mechanism flange of the fixed tool by using a marker pen, removing the original anchor ear, installing a new anchor ear with a locating pin back to the mechanism, and locking the new anchor ear according to the required moment;
s3: after the new anchor ear is locked, the special tool is dismantled, the mark is observed, and no displacement between the mechanism flange and the vertical connecting rod is ensured again, so that the isolating switch can normally operate.
The same or similar reference numerals correspond to the same or similar components;
the terms describing the positional relationship in the drawings are merely illustrative, and are not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The utility model provides an maintenance frock of anchor ear is changed in ALSTOM isolator uninterrupted power supply, its characterized in that includes transition board, upper end anchor clamps and lower extreme anchor clamps, the transition board is opened has anchor ear to change the window, anchor ear change the window and be used for demolishing and wait to change the anchor ear and install new anchor ear, the transition board is at the upper end and the upper end anchor clamps fixed connection of anchor ear change the window, upper end anchor clamps clamp in the perpendicular connecting rod of switch mechanism upper end, the transition board is at the lower extreme and the lower extreme anchor clamps fixed connection of anchor ear change the window, lower extreme anchor clamps clamp and switch mechanism clamp in the output shaft;
the maintenance method for replacing the anchor ear of the ALSTOM isolating switch without power failure is applied to the maintenance tool and comprises the following steps:
s1: the upper end of the special tool is tightly held at a proper position of a vertical connecting rod at the upper part of the anchor ear, and the lower end of the special tool is fixed on a flange of the mechanism output, so that the mechanism output flange is tightly connected with the vertical connecting rod through the special tool;
s2: marking the original positions of the vertical connecting rod and the mechanism flange of the fixed tool by using a marker pen, removing the original anchor ear, installing a new anchor ear with a locating pin back to the mechanism, and locking the new anchor ear according to the required moment;
s3: after the new anchor ear is locked, the special tool is dismantled, the mark is observed, and no displacement between the mechanism flange and the vertical connecting rod is ensured again, so that the isolating switch can normally operate.
2. The repair fixture for replacing the anchor clamps of the ALSTOM isolating switch without power failure of claim 1, wherein the upper clamp is an adjustable diameter anchor clamp.
3. The repair fixture for replacing the anchor ear of the ALSTOM isolating switch without power failure according to claim 2, wherein the diameter adjustment range of the anchor ear with adjustable diameter is 40mm-80mm.
4. The overhauling tool for replacing a hoop of an ALSTOM isolating switch without power failure according to claim 3, wherein the transition plate is provided with a plurality of connecting bolt holes at the upper end of a hoop replacement window, and the upper end clamp is fixedly connected with the transition plate through the bolt holes and the bolts.
5. The tool for overhauling an ALSTOM isolating switch without power failure to replace a hoop according to claim 4, wherein the transition plate is provided with four connecting bolt holes at the upper end of the hoop replacement window.
6. The overhauling tool for replacing a hoop of an ALSTOM isolating switch without power failure of claim 5, wherein a plurality of screw holes are formed in the lower end of the hoop replacement window of the transition plate, and the lower end clamp is fixedly connected to the transition plate through the screw holes.
7. The repair fixture for replacing a hoop of an ALSTOM isolation switch without power outage of claim 6, wherein the lower clamp is a stop bolt.
8. The repair fixture for replacing the anchor ear of the ALSTOM isolating switch without power failure of claim 7, wherein the transition plate is provided with six screw holes at the lower end of the anchor ear replacement window.
9. The repair fixture for replacing a hoop of an ALSTOM isolation switch without power outage of claim 8, wherein four stop bolts are provided, one stop bolt corresponding to each of six screw holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126920.3A CN111342377B (en) | 2020-02-28 | 2020-02-28 | Maintenance tool and maintenance method for replacing anchor ear of ALSTOM isolating switch without power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126920.3A CN111342377B (en) | 2020-02-28 | 2020-02-28 | Maintenance tool and maintenance method for replacing anchor ear of ALSTOM isolating switch without power failure |
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| Publication Number | Publication Date |
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| CN111342377A CN111342377A (en) | 2020-06-26 |
| CN111342377B true CN111342377B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010126920.3A Active CN111342377B (en) | 2020-02-28 | 2020-02-28 | Maintenance tool and maintenance method for replacing anchor ear of ALSTOM isolating switch without power failure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259397B (en) * | 2020-09-30 | 2024-02-27 | 国网山东省电力公司昌乐县供电公司 | High-voltage disconnecting link replacement fixing device |
| CN113161912B (en) * | 2021-04-07 | 2024-06-04 | 国网吉林省电力有限公司电力科学研究院 | Uninterrupted maintenance device for high-voltage isolating switch operating mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013440A1 (en) * | 2007-03-21 | 2008-09-25 | Klotter, Werner | Clamp for medium-voltage system or distribution stations for maintaining and repairing medium-voltage switch, is attached in form of movable clamping jaws and opposite support in geometrical form |
| CN102412517A (en) * | 2011-12-12 | 2012-04-11 | 辽宁省电力有限公司锦州供电公司 | Method for disconnecting and connecting neutral point isolation switch leads of 66kV transformer in electrification |
| CN102611035A (en) * | 2012-03-15 | 2012-07-25 | 福建省电力有限公司三明电业局 | Special tool and method for charged replacement of middle-phase tension insulator |
| CN102983035A (en) * | 2012-11-21 | 2013-03-20 | 正泰电气股份有限公司 | Three phase earthing switch structure driven by duplex pull rods and distributed in I shape |
| CN103280724A (en) * | 2013-06-24 | 2013-09-04 | 国家电网公司 | Disconnecting link porcelain bottle displacement maintenance base replacement device |
| CN103318745A (en) * | 2013-06-06 | 2013-09-25 | 国家电网公司 | Lightweight special-purposed spreader and mounting method thereof |
| CN109980562A (en) * | 2019-03-28 | 2019-07-05 | 广东电网有限责任公司 | A kind of more changing device of Alstom disconnecting link anchor ear |
| CN212258220U (en) * | 2020-02-28 | 2020-12-29 | 广东电网有限责任公司 | Maintenance frock of change staple bolt that ALSTOM isolator does not have a power failure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3062614A4 (en) * | 2013-10-30 | 2017-07-19 | Drifter Marine, Inc. | Fishing net and method of manufacturing same |
-
2020
- 2020-02-28 CN CN202010126920.3A patent/CN111342377B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013440A1 (en) * | 2007-03-21 | 2008-09-25 | Klotter, Werner | Clamp for medium-voltage system or distribution stations for maintaining and repairing medium-voltage switch, is attached in form of movable clamping jaws and opposite support in geometrical form |
| CN102412517A (en) * | 2011-12-12 | 2012-04-11 | 辽宁省电力有限公司锦州供电公司 | Method for disconnecting and connecting neutral point isolation switch leads of 66kV transformer in electrification |
| CN102611035A (en) * | 2012-03-15 | 2012-07-25 | 福建省电力有限公司三明电业局 | Special tool and method for charged replacement of middle-phase tension insulator |
| CN102983035A (en) * | 2012-11-21 | 2013-03-20 | 正泰电气股份有限公司 | Three phase earthing switch structure driven by duplex pull rods and distributed in I shape |
| CN103318745A (en) * | 2013-06-06 | 2013-09-25 | 国家电网公司 | Lightweight special-purposed spreader and mounting method thereof |
| CN103280724A (en) * | 2013-06-24 | 2013-09-04 | 国家电网公司 | Disconnecting link porcelain bottle displacement maintenance base replacement device |
| CN109980562A (en) * | 2019-03-28 | 2019-07-05 | 广东电网有限责任公司 | A kind of more changing device of Alstom disconnecting link anchor ear |
| CN212258220U (en) * | 2020-02-28 | 2020-12-29 | 广东电网有限责任公司 | Maintenance frock of change staple bolt that ALSTOM isolator does not have a power failure |
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| Publication number | Publication date |
|---|---|
| CN111342377A (en) | 2020-06-26 |
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