CN111342378A - Temporary unlocking tool and unlocking method for insulation measurement of switch cabinet - Google Patents
Temporary unlocking tool and unlocking method for insulation measurement of switch cabinet Download PDFInfo
- Publication number
- CN111342378A CN111342378A CN202010250976.XA CN202010250976A CN111342378A CN 111342378 A CN111342378 A CN 111342378A CN 202010250976 A CN202010250976 A CN 202010250976A CN 111342378 A CN111342378 A CN 111342378A
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- Prior art keywords
- switch cabinet
- operating handle
- switch
- unlocking tool
- connecting rod
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- Granted
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- 238000009413 insulation Methods 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000926 separation method Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013095 identification testing Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
Images
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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention belongs to the technical field of electrical equipment of nuclear power stations, and particularly relates to a temporary unlocking tool and an unlocking method for insulation measurement of a switch cabinet. The unlocking tool is small, exquisite and flexible, convenient to carry and simple in operation method, solves the problem that an earthing switch is damaged by operating the earthing switch in the insulation measuring process, prolongs the service life of the position indicator, effectively reduces maintenance workload, reduces the unavailability rate of a switch cabinet caused by power failure in maintenance, improves the operational reliability of a station power system, effectively matches with an interlocking mechanism of the switch cabinet, is high in degree of agreeing with, and does not have the problem that the interlocking mechanism is not operated in place or harmed improperly.
Description
Technical Field
The invention belongs to the technical field of electrical equipment of nuclear power stations, and particularly relates to a temporary unlocking tool and an unlocking method for insulation measurement of a switch cabinet.
Background
Medium voltage switchgear is as a general type cubical switchboard, has considered cable chamber cabinet door when opening in five protections designs, can not operate earthing switch, and earthing switch is in the branch floodgate position, and cable chamber cabinet door can not be opened. Structurally, when the cable chamber cabinet door is opened, the locking tongue piece at the position of the grounding switch operation hole is popped out from the position indicator square hole, so that the operation handle is prevented from being inserted, otherwise, the cable chamber cabinet door is closed, the locking tongue piece retracts from the position indicator square hole, and after the grounding switch is opened, the cable chamber cabinet door is locked, wherein the position indicator is made of plastic materials, and the locking tongue piece is made of metal materials.
During the operation or maintenance of the unit, the insulation measurement before the medium-voltage load equipment is put into operation, periodically switched, functionally verified and repaired quality re-identification test is measured under the condition that a switch cabinet bus is electrified, and the measurement of the load insulation risk in a switch cabinet breaker chamber is extremely high, so that the measurement is carried out on the side of a cable chamber, and the specific operation steps are as follows: positioning the circuit breaker in an isolation position; switching on the grounding switch, taking down the operating handle and opening the cabinet door of the cable chamber; the cable chamber cabinet door is hidden to remove the locking tongue piece at the operation hole, and the operation handle is inserted; opening a cabinet door of the cable chamber, operating a grounding switch to open, and executing insulation measurement work; and after the insulation measurement is finished, switching on the grounding switch, taking down the operating handle and closing the cabinet door.
Although realized operating earthing switch under this operating mode and measured insulating when cable chamber cabinet door is opened, neglected the normal of cable chamber cabinet door back shutting tongue piece and popped out, when position indicator rotated along with the earthing switch actuating lever, the shutting tongue piece that pops out supported on position indicator and scrapes position indicator all the time, relapse repetitious operation, position indicator will be by the fish tail and cut out, make position indicator take place the skew because of the atress even, lead to the position indication mistake, if position indicator instructs the separating brake, and the earthing switch body is the position of closing the floodgate actually, cause operating personnel misjudgement. According to the statistics of overhaul and daily defects of the 1 and 2 machine sets in the period of 2012-2016, the damage rate of the position indicator of the grounding switch of the medium-voltage switch cabinet is up to more than 76%.
Therefore need design a cubical switchboard insulation measurement and use interim unblock instrument, can avoid damaging earthing switch position indicator under cubical switchboard cable chamber measures insulating mode, solve the not enough of prior art.
Disclosure of Invention
The invention aims to provide a temporary unlocking tool and an unlocking method for insulation measurement of a switch cabinet, aiming at the defects of the prior art, when insulation is measured in a cable chamber of the switch cabinet, a locking tongue piece at an operation hole of a grounding switch can be temporarily released, and the situation that the locking tongue piece cannot directly damage a position indicator in the process of opening a cabinet door of the cable chamber to operate the grounding switch is realized.
The technical scheme of the invention is as follows:
the utility model provides a cubical switchboard insulation measurement is with interim unblock instrument, this instrument includes operating handle, rotatable connecting rod, fixed pin and U type groove, and operating handle and rotatable connecting rod are connected, rotatable connecting rod front end and U type bottom of the groove fixed connection.
The operating handle and the rotatable connecting rod are fixedly connected through a fixing pin.
The operating handle is manufactured by integral machining, the interior of the operating handle is of a hollow through structure, the front half part of the operating handle is provided with a double-wing type baffle and an anti-falling protruding circular truncated cone, and the rear half part of the operating handle is a cylinder.
The operating handle, the rotatable connecting rod and the U-shaped groove are made of stainless steel.
The front end of the double-wing type separation blade on the operating handle is provided with a fixing pin mounting hole, and the diameter of the fixing pin mounting hole is smaller than the inner diameter of the operating handle.
The rotatable connecting rod is of a concentric cylinder structure.
The fixing pin is embedded in the fixing pin mounting hole at the front end of the double-wing type separation blade in an interference manner.
The front end of the rotatable connecting rod is embedded in the U-shaped groove in an interference manner.
The temporary unlocking method for insulation measurement of the switch cabinet specifically comprises the following steps:
after the grounding switch is switched on, opening a cabinet door of a switch cabinet, and clamping a U-shaped groove on a circular shaft of an unlocking fan-shaped sheet by an unlocking tool through a rectangular operation hole of the switch cabinet; pushing the unlocking tool to the inner side of the rectangular operation hole of the switch cabinet until the locking tongue piece is completely separated from the position indicator, and then the double-fin type separation blade completely enters the rectangular operation hole of the switch cabinet;
and (2) rotating the operating handle clockwise or anticlockwise by 90 degrees, fixing the double-wing type retaining sheet on the switch cabinet after the handle is operated by loosening the hand by utilizing the self spring force of the locking tongue piece, operating the grounding switch to open the brake, executing insulation resistance measurement, operating the grounding switch to open the brake, rotating the operating handle clockwise or anticlockwise by 90 degrees, taking out the unlocking tool, and finishing the insulation resistance measurement of the switch cabinet.
The invention has the following beneficial effects:
(1) the invention provides a novel temporary unlocking tool for insulation measurement of a switch cabinet, solves the problem that a position indicator of an earthing switch is damaged by operating the earthing switch in the insulation measurement process, and prolongs the service life of the position indicator.
(2) The invention effectively reduces the maintenance workload, reduces the unavailability rate of the switch cabinet caused by power failure during maintenance, and improves the operation reliability of the auxiliary power system.
(3) The operating handle of the temporary unlocking tool for insulation measurement of the switch cabinet is provided with the anti-falling convex cylinder, so that the tool is prevented from falling into the switch cabinet in the using process.
(4) After the operation is accomplished, only take off this cubical switchboard insulation measurement and just can close the cabinet door with interim unblock instrument, avoid losing inside the cubical switchboard.
(5) The interlocking mechanism of the switch cabinet is effectively matched, the fitting degree is high, and the problem that the interlocking mechanism is damaged due to improper operation or improper damage does not exist.
(6) The invention is small and flexible, convenient to carry and simple in operation method.
Drawings
Fig. 1 is a front view of a temporary unlocking tool for insulation measurement of a switch cabinet according to the present invention;
FIG. 2 is a top view of a temporary unlocking tool for insulation measurement of a switch cabinet according to the present invention;
FIG. 3 is a sectional view of a temporary unlocking tool for insulation measurement of a switch cabinet according to the present invention;
fig. 4 is an operation schematic diagram of a temporary unlocking tool for insulation measurement of a switch cabinet according to the invention.
Wherein: 1-operating handle, 2-rotatable connecting rod, 3-fixed pin, 4-U-shaped groove, 5-anti-falling protruding circular table, 6-double-wing type catch, 7-rectangular operating hole of switch cabinet, 8-position indicator, 9-locking tongue piece, 10-unlocking fan-shaped piece and 11-switch cabinet
Detailed Description
The present technology is further described below:
as shown in fig. 1, 2 and 3, the invention provides a temporary unlocking tool for insulation measurement of a switch cabinet, which comprises an operating handle 1, a rotatable connecting rod 2, a fixing pin 3 and a U-shaped groove 4. In 3 interference embedding operating handle 1 mounting holes of fixed pin, fix rotatable connecting rod 2 on operating handle 1, in 2 front end interference embedding U type groove 4 bottom mounting holes of rotatable connecting rod.
The operating handle 1 is mainly used for fixing and rotating a whole set of tools, the operating handle 1 is manufactured by an integral machine, the interior of the operating handle 1 is of a hollow through structure, a double-wing baffle 6 and an anti-falling protruding circular truncated cone 5 are machined in the front half part of the operating handle, and the rear half part of the operating handle 1 is a cylinder and used for being held and operated.
The front end of the double-wing type baffle 6 on the operating handle 1 is provided with a fixing pin mounting hole, and the diameter of the fixing pin mounting hole is smaller than the inner diameter of the operating handle 1.
The U-shaped groove 4 is mainly used for clamping on a round shaft of the unlocking fan-shaped piece 10, and moving and changing the position of the unlocking fan-shaped piece 10. Rotatable connecting rod 2 is concentric cylinder structure, fixes rotatable connecting rod 2 inside operating handle 1 through fixed pin 3, guarantees that the connecting rod can rotate wantonly along the axial to fixed pin 3 and the interference embedding of 1 mounting hole of operating handle, the interference embedding of 2 connecting rod front ends of rotatable connecting rod is installed on U type groove 4.
As shown in fig. 4, the invention further provides a temporary unlocking method for insulation measurement of a switch cabinet, which specifically comprises the following steps:
after the grounding switch is switched on, opening a cabinet door of a switch cabinet 11, and clamping the unlocking tool on a circular shaft of an unlocking fan-shaped sheet 10 through a rectangular operation hole 7 of the switch cabinet and a U-shaped groove 4; the unlocking tool is pushed towards the inner side of the rectangular operation hole 7 of the switch cabinet until the locking tongue piece 9 is completely separated from the position indicator 8, and at the moment, the double-wing type blocking piece 6 completely enters the rectangular operation hole 7 of the switch cabinet;
and (2) rotating the operating handle 1 clockwise or anticlockwise by 90 degrees, fixing the double-wing type catch 6 on the switch cabinet 11 after the handle is operated by releasing the hand by utilizing the self spring force of the locking tongue piece 9, operating the grounding switch to open the brake, executing insulation resistance measurement, operating the grounding switch to open the brake, rotating the operating handle 1 clockwise or anticlockwise by 90 degrees, taking out the unlocking tool, and finishing the insulation resistance measurement of the switch cabinet.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (9)
1. The utility model provides a cubical switchboard insulation measurement is with interim unblock instrument which characterized in that: the tool comprises an operating handle (1), a rotatable connecting rod (2), a fixing pin (3) and a U-shaped groove (4), wherein the operating handle (1) is connected with the rotatable connecting rod (2), and the front end of the rotatable connecting rod (2) is connected with the U-shaped groove (4).
2. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 1, wherein: the operating handle (1) is fixedly connected with the rotatable connecting rod (2) through a fixing pin (3).
3. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 2, wherein: the operating handle (1) is manufactured by integral machining, the interior of the operating handle is of a hollow through structure, the front half part of the operating handle is provided with a double-wing type baffle (6) and an anti-falling protruding round platform (5), and the rear half part of the operating handle is a cylinder.
4. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 3, wherein: the operating handle (1), the rotatable connecting rod (2) and the U-shaped groove (4) are made of stainless steel.
5. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 4, wherein: the front end of the double-wing type separation blade (6) on the operating handle (1) is provided with a fixing pin mounting hole, and the diameter of the fixing pin mounting hole is smaller than the inner diameter of the operating handle (1).
6. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 5, wherein: the rotatable connecting rod (2) is of a concentric cylinder structure.
7. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 6, wherein: the fixing pin (3) is embedded in a fixing pin mounting hole in the front end of the double-fin type separation blade (6) in an interference manner.
8. The temporary unlocking tool for insulation measurement of the switch cabinet according to claim 7, wherein: the rotatable connecting rod (2) is arranged on the U-shaped groove (4) in an interference embedded mode at the front end of the connecting rod.
9. The method for temporarily unlocking a switchgear cabinet for insulation measurement according to any one of claims 1 to 8, characterized in that the method comprises the following steps:
after the grounding switch is switched on, opening a cabinet door of a switch cabinet (11), and clamping a U-shaped groove (4) on a circular shaft of an unlocking fan-shaped sheet (10) through a rectangular operation hole (7) of the switch cabinet by using an unlocking tool; pushing the unlocking tool to the inner side of the rectangular operation hole (7) of the switch cabinet until the locking tongue piece (9) is completely separated from the position indicator (8), and then the double-fin type separation blade (6) completely enters the rectangular operation hole (7) of the switch cabinet;
and (2) rotating the operating handle (1) clockwise or anticlockwise by 90 degrees, loosening the hand by utilizing the self spring force of the locking tongue piece (9) to fix the double-wing type blocking piece (6) on the switch cabinet (11), operating the grounding switch to open the switch, executing insulation resistance measurement, operating the grounding switch to open the switch, rotating the operating handle (1) clockwise or anticlockwise by 90 degrees, taking out the unlocking tool, and finishing the insulation resistance measurement of the switch cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010250976.XA CN111342378B (en) | 2020-04-01 | 2020-04-01 | Temporary unlocking tool and method for switch cabinet insulation measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010250976.XA CN111342378B (en) | 2020-04-01 | 2020-04-01 | Temporary unlocking tool and method for switch cabinet insulation measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111342378A true CN111342378A (en) | 2020-06-26 |
| CN111342378B CN111342378B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010250976.XA Active CN111342378B (en) | 2020-04-01 | 2020-04-01 | Temporary unlocking tool and method for switch cabinet insulation measurement |
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| CN (1) | CN111342378B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114628174A (en) * | 2022-02-15 | 2022-06-14 | 江苏核电有限公司 | Electrical switch cabinet self-adaptive unlocking device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111342378B (en) | 2024-03-19 |
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