CN109449017B - Circuit breaker with external isolating switch - Google Patents
Circuit breaker with external isolating switch Download PDFInfo
- Publication number
- CN109449017B CN109449017B CN201811480831.8A CN201811480831A CN109449017B CN 109449017 B CN109449017 B CN 109449017B CN 201811480831 A CN201811480831 A CN 201811480831A CN 109449017 B CN109449017 B CN 109449017B
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- sector gear
- switch
- motor
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 230000001960 triggered effect Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 17
- 230000010354 integration Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/36—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
Abstract
The invention relates to a circuit breaker with an external isolating switch, which comprises a circuit breaker body and the isolating switch arranged on the circuit breaker body, wherein an electric mechanism comprises a fixing frame, a motor is arranged on the fixing frame, a sector gear is arranged on a isolating main shaft, an output gear which is used for driving the sector gear on the isolating main shaft to switch on and rotate in a forward rotation way and driving the sector gear on the isolating main shaft to switch off and rotate in a reverse rotation way is assembled on an output shaft of the electric mechanism, a switching-on travel switch triggered at the tail end of a switching-on travel of the sector gear and a switching-off travel switch triggered at the tail end of a switching-off travel of the sector gear are arranged on the fixing frame or the isolating switch support, and trigger parts for triggering corresponding travel switches are arranged on two sides of the sector gear along the rotation direction. The problem of among the prior art isolator on the circuit breaker the driving medium set up respectively on the isolation main shaft with the trigger piece, cause the circuit breaker integrated level low is solved.
Description
Technical Field
The invention relates to a circuit breaker with an external isolating switch.
Background
At present, an electric isolating switch in the market is formed by independently arranging a travel switch and a transmission part, the travel switch is required to be additionally arranged on a breaker body, and the problem of inconvenient installation and debugging in the later period exists.
The application publication number CN108550490A and the application publication date 2018.09.18 of Chinese patent application disclose an isolating circuit breaker, an isolating switch and an electric isolating chassis thereof, wherein the isolating circuit breaker comprises a circuit breaker body and the isolating switch, and the isolating switch comprises the electric isolating chassis and a movable contact knife arranged on the electric isolating chassis. The electric isolation underframe comprises a bracket fixed on the breaker body, an isolation rotating shaft is arranged on the bracket in a penetrating manner along the left-right direction, the isolation rotating shaft is rotatably arranged on the bracket, and both axial sides of the isolation rotating shaft penetrate out of the bracket. One of the support of the isolating switch and the isolating rotating shaft is provided with a travel switch structure, and the other is provided with a trigger part. The right-hand member of keeping apart the pivot wears to go out to install the gear sleeve on the end, installs first bevel gear on the gear sleeve, still installs the motor mounting bracket simultaneously in the right-hand member outside of support, installs the motor through two sets of staple bolts about on the motor mounting bracket, and the output shaft of motor upwards extends to the end is changeed and is installed second bevel gear, intermesh between second bevel gear and the first bevel gear, makes the motor drive the pivot of keeping apart and rotates the realization divide-shut brake. Three groups of connecting crank arms are arranged on the isolating rotating shaft at intervals along the axial direction, isolating pull rods are arranged on the connecting crank arms, one ends of the isolating pull rods are arranged on the connecting crank arms, and the other ends of the isolating pull rods are connected with the movable contact knife. The two isolation wiring boards are connected and disconnected through the positive rotation and the negative rotation of the isolation rotating shaft. The trigger blocks are arranged on the middle connecting crank arm and the right connecting crank arm, and each trigger block is provided with an arc-shaped jacking surface and can convert circumferential rotation of the trigger block into axial movement of a trigger end of the travel switch so as to trigger the corresponding travel switch.
The isolating spindle is an isolating spindle of the isolating switch, the isolating spindle is driven by the motor to rotate, the first bevel gear between the motor and the isolating spindle is used as a transmission part to transmit motor power to the isolating spindle, the trigger block of the trigger travel switch is arranged on the connecting crank arm of the isolating spindle, and the transmission part and the trigger block are respectively arranged on the isolating spindle, so that the circuit breaker is low in integration level.
Disclosure of Invention
The invention aims to provide a circuit breaker with an external isolating switch, which solves the problem of low integration level of the circuit breaker caused by the fact that a transmission piece and a trigger block of the isolating switch on the circuit breaker are respectively arranged on an isolating main shaft in the prior art.
The invention relates to a circuit breaker with an external isolating switch, which adopts the following technical scheme:
the utility model provides an external isolator's circuit breaker includes the circuit breaker body and sets up the isolator on the circuit breaker body, and the isolator includes the isolator support, is equipped with the isolation main shaft that drives the isolator action and is used for driving the electric mechanism of isolator main shaft action on the isolator support, and electric mechanism is including fixing the mount on the isolator support, be equipped with the motor on the mount, the direction of defining motor forward rotation is the closing direction of isolation main shaft, be equipped with the sector gear on the isolation main shaft, the output shaft of electric mechanism is equipped with the sector gear on the forward rotation and drives the sector gear on the isolation main shaft and close a floodgate pivoted output gear, be equipped with on mount or the isolator support and be triggered at the end of sector gear closing stroke and be triggered at the end of sector gear opening stroke and close a floodgate travel switch, the both sides of sector gear along its direction of rotation all are equipped with the trigger part that is used for triggering corresponding travel switch.
The beneficial effects of the invention are as follows: the sector gear is used as a transmission part, and a trigger part for triggering a travel switch is integrated, so that compared with the prior art that the transmission part and the trigger block are respectively arranged on the isolation main shaft, the isolation switch has higher integration level, and the problem that the circuit breaker has low integration level due to the fact that the transmission part and the trigger block of the isolation switch on the circuit breaker are respectively arranged on the isolation main shaft in the prior art is solved.
In order to simplify the sector gear structure, in this embodiment, the two sides of the sector gear in the rotation direction form the triggering part.
In order to avoid misoperation of the motor and damage to a mechanical interlocking mechanism of the circuit breaker when the circuit breaker is in a closing state, in the scheme, a relay is arranged on the fixing frame, and auxiliary contacts of the relay are connected in series on a loop of the motor or connected in parallel on two sides of the motor. Therefore, the motor can be operated only under the condition that the relay is electrified, and the misoperation of the motor under the state that the circuit breaker is in a closing state is avoided, and the mechanical interlocking mechanism of the circuit breaker is damaged.
For the space of make full use of mount to motor mechanism installs on the isolator support, in this scheme relay and motor all set up in the same side of mount.
For the maintenance and replacement of making things convenient for sector gear, in this scheme the sector gear is through on the isolation main shaft of key and keyway cooperation anti-rotating assembly, directly drives isolation main shaft through the rotation of sector gear like this and rotates, avoids setting up the intermediate drive spare between sector gear and isolation main shaft, makes the structure of circuit breaker compacter.
For the fixed connection of convenient mount and isolator support, in this scheme be equipped with the connecting rod of perpendicular to mount on the mount, the mount passes through the connecting rod assembly on the isolator support.
Drawings
Fig. 1 is a schematic structural diagram of an interrupt circuit breaker according to an embodiment of the present invention;
FIG. 2 is a schematic view of the electric mechanism of FIG. 1 with the isolating switch in a closed state;
FIG. 3 is a schematic view of the electric mechanism of the isolating switch of FIG. 1 in the open state;
FIG. 4 is a schematic diagram of the transmission of FIG. 2;
FIG. 5 is a schematic view of the sector gear of FIG. 2;
fig. 6 is a schematic diagram of an electric mechanism of the circuit breaker of the external disconnecting switch of the invention.
In the figure: 1. isolating main shaft, 2, isolating switch bracket, 3, shaft clamp, 4, electric mechanism, 5, breaker body, 41, connecting rod, 42, relay, 43, transmission, 44, shift fork, 45, travel switch, 46, fixing frame, 47, motor, 48, terminal block, 431, sector gear, 432, cylindrical gear, 433, bearing, 434, shaft, 4311, shaft hole, 4312, keyway.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
In a specific embodiment of the circuit breaker with the external disconnecting switch, as shown in fig. 1, the circuit breaker with the external disconnecting switch comprises a circuit breaker body 5 and a disconnecting switch arranged on the circuit breaker body 5. The isolating switch comprises an isolating switch bracket 2, and an isolating main shaft 1 for driving the isolating switch to act and an electric mechanism 4 for driving the isolating main shaft 1 to act are arranged on the isolating switch bracket 2. As shown in fig. 2 and 3, the electric mechanism 4 includes a fixing frame 46, a motor 47 is fixed on the fixing frame 46, a cylindrical gear 432 is assembled on an output shaft of the motor 47 in a rotation stopping manner, as shown in fig. 4, in this embodiment, the cylindrical gear 432 is fixed on a shaft 434, and bearings 433 press on two ends of the shaft 434 to coaxially drive and connect the shaft 434 with the output shaft of the motor 47. The isolating spindle 1 is fixed with a sector gear 431 meshed with a cylindrical gear 432, as shown in fig. 5, the sector gear 431 in this embodiment is provided with a shaft hole 4311 and a key slot 4312, and the isolating spindle 1 passes through the shaft hole 4311 and is fixed on the sector gear 431 through a spindle clip 3, that is, the sector gear 431 is matched with the key slot through a key to be assembled on the isolating spindle 1. In other embodiments, the sector gear may also be fixed to the isolation spindle by welding; the sector gear can also be fixed on the isolating spindle 1 by a bolt.
The forward rotation direction of the motor 47 is defined as the closing direction of the isolation main shaft 1, when the motor 47 rotates forward, the cylindrical gear 432 drives the sector gear 431 on the isolation main shaft 1 to close and rotate, and when the motor 47 rotates backward, the cylindrical gear 432 drives the sector gear 431 on the isolation main shaft 1 to open and rotate. The cylindrical gear 432 in the present embodiment constitutes an output gear of the motor 47, the cylindrical gear 432, the sector gear 431, the bearing 433 and the shaft 434 constitute a transmission device 43 that transmits power of the motor output shaft to the isolation spindle 1, and the sector gear 431 constitutes a transmission member of the isolation spindle 1.
The fixed frame 46 is further provided with a travel switch 45, the travel switch 45 comprises a closing travel switch and a separating travel switch, the closing travel switch and the separating travel switch are both provided with a shifting fork 44, and two sides of the sector gear 431 along the rotation direction form a trigger part for triggering the travel switch 45 by contacting with the shifting fork 44, wherein the trigger part corresponding to the closing travel switch is a closing trigger part, and the trigger part corresponding to the separating travel switch is a separating trigger part. At the end of the closing stroke of the sector gear 431, the shifting fork 44 on the closing stroke switch is triggered by the closing trigger part, and the motor 47 stops rotating; at the end of the opening stroke of the sector gear 431, the fork 44 on the opening stroke switch is triggered by the opening trigger portion, and the motor 47 stops rotating. In other embodiments, a stop block may be fixed on two sides of the sector gear along the rotation direction of the sector gear, and the stop block contacts with the shifting fork to trigger the travel switch, where the stop block forms the triggering part.
The sector gear 431 is used as a transmission part, and a trigger part for triggering a travel switch is integrated, so that compared with the prior art that the transmission part and the trigger block are respectively arranged on the isolation main shaft, the isolation switch has higher integration level, and the problem that the circuit breaker has low integration level due to the fact that the transmission part and the trigger block of the isolation switch on the circuit breaker are respectively arranged on the isolation main shaft in the prior art is solved.
As shown in fig. 2 and 3, a relay 42 connected in series to a motor 47 is provided on a holder 46, a normally open auxiliary contact is provided on the relay 42, a terminal block 48 is fixed on the holder 46, and a breaker auxiliary switch DL is provided on the breaker. The connection of the breaker, the motor 47, the auxiliary breaker DL, the disconnecting switch opening contact CK-1, the disconnecting switch closing contact CK-2 and the terminals on the terminal block 48 is shown in FIG. 6, and two ends of the relay coil ZJ-1 are respectively connected with an eighth terminal JX-8 and a ninth terminal JX-9 of the terminal block 48; the normally open relay contact ZJ-2 and the auxiliary breaker switch DL are connected in series with the motor 47, one end of the auxiliary breaker switch DL is connected with a fifth wiring terminal JX-5 of the terminal block 48, and one end of the motor 47 is connected with a sixth wiring terminal JX-6 of the terminal block 48; two ends of the disconnecting contact CK-2 of the disconnecting switch are respectively connected with a third wiring terminal JX-3 and a fourth wiring terminal JX-4 of the terminal block 48; the two ends of the isolating switch closing contact CK-1 are respectively connected with a first wiring terminal JX-1 and a second wiring terminal JX-2 of the terminal block 48. Each terminal on the terminal block 48 is connected to a controller, and the connection state between each terminal on the terminal block 48 is controlled by the controller. The auxiliary switch DL of the circuit breaker is switched on when the circuit breaker is switched off and is switched off when the circuit breaker is switched on; the isolating switch closing contact CK-1 is disconnected when the isolating switch is closed in place, and the controller controls the motor 47 to stop rotating; the disconnecting switch opening contact CK-2 is disconnected when the disconnecting switch is in place, and the controller controls the motor 47 to stop rotating; the normally open contact ZJ-2 of the relay is conducted under the condition that the relay coil ZJ-1 is electrified, and is disconnected under other states. The normally open relay contact in this embodiment constitutes an auxiliary relay contact.
Specifically, when the isolating switch is in the closed state shown in fig. 2, the electric mechanism 4 drives the isolating switch to open as follows: when the circuit is electrified and the circuit breaker is in a breaking state, the relay 42 is electrified, after the controller outputs a breaking command, the motor 47 reversely rotates to drive the transmission device 43 and the isolating spindle 1 to rotate anticlockwise until a breaking trigger end of the sector gear 431 presses a shifting fork 44 of a breaking stroke opening and hanging, a breaking stroke switch is switched to output a state, and the motor 47 stops rotating. When the isolating switch is in the opening state shown in fig. 3, the electric mechanism 4 drives the isolating switch to be closed as follows: when electricity is supplied to the circuit and the circuit breaker is in a switching-off state, the relay 42 is electrified, after the controller outputs a switching-on command, the motor 47 rotates forward to drive the transmission device 43 and the isolating spindle 1 to rotate clockwise until the switching-on trigger end of the sector gear 431 presses the shifting fork 44 of the switching-on travel switch, the switching-on travel switch switches off state output, and the motor 47 stops rotating.
When the disconnecting switch is in a switching-off state, if the disconnecting switch is operated by mistake to switch on the disconnecting switch, at the moment, the normally open contact ZJ-2 of the relay 42 is in a switching-off state, the loop of the motor 47 cannot be switched on, the switching-on and switching-off of the disconnecting switch can be operated only manually, and the disconnecting switch cannot be driven to switch on by the motor 47. Only when the relay 42 is energized, the motor 47 circuit is turned on, and the disconnecting switch can be driven to be opened or closed by the electric mechanism 4. The misoperation of the motor 47 in the closing state of the circuit breaker is avoided, and the mechanical interlocking mechanism is damaged due to the large rotating force of the motor 47.
In addition, in order to make full use of the space of the fixing frame 46 and facilitate the motor mechanism to be mounted on the isolating switch bracket, the relay 42 and the motor 47 in the embodiment are both fixed on the same side of the fixing frame 46. In other embodiments, the relay normally-closed contacts can be connected in parallel to two sides of the motor, at this time, the relay normally-closed contacts are disconnected under the condition that the relay coil is electrified, the motor loop is connected, the relay normally-closed contacts are in a conducting state under other conditions, the motor loop is disconnected, and the breaker can be manually operated to switch on or off, wherein the relay normally-closed contacts form the relay auxiliary contacts. In other embodiments, the relay is not arranged on the fixing frame, and the motor is controlled only through a control switch of the motor; the relay can also be arranged on one side of the fixing frame, which is away from the motor.
In order to facilitate the fixed connection between the fixing frame 46 and the isolating switch bracket 2, the fixing frame 46 in this embodiment is provided with a connecting rod 41 perpendicular to the fixing frame 46, meanwhile, an internal threaded hole is formed in the connecting rod 41, a welding nut corresponding to the internal threaded hole is arranged on the isolating switch bracket 2, and the connecting rod 41 is fixed on the isolating switch bracket 2 through a fastening screw when the internal threaded hole on the connecting rod 41 is aligned with the corresponding welding nut. In other embodiments, a connecting plate can be fixed on the fixing frame, and the fixing frame is fixedly connected with the isolating switch bracket through the connecting plate; the connecting rod and the isolating switch bracket can also be fixed through welding. In this embodiment, the transmission device 43, the travel switch 45, the relay 42 and the motor 47 are all disposed on the fixing frame 46, and can be assembled with the circuit breaker after the independent debugging is completed, so that the installation and debugging are convenient in the later stage.
Claims (6)
1. The utility model provides an external isolator's circuit breaker, includes the circuit breaker body and sets up the isolator on the circuit breaker body, and the isolator includes the isolator support, is equipped with the isolation main shaft that drives the isolator action and is used for driving the electric mechanism of isolator main shaft action on the isolator support, and electric mechanism is including fixing the mount on the isolator support, be equipped with the motor on the mount, define the direction that the motor corotation is the closing direction of isolation main shaft, characterized by, be equipped with the sector gear on the isolator main shaft, the epaxial rotation that ends of motor's output is equipped with the sector gear on the drive isolation main shaft of corotation and rotates, the rotatory output gear of sector gear brake-separating on the drive isolation main shaft of reversal, be equipped with on mount or the isolator support at the end of sector gear brake-closing stroke by the switch and at the end of sector gear brake-separating stroke by the brake-separating stroke of triggering the switch, the sector gear all is equipped with the trigger part that is used for triggering corresponding stroke switch along its rotation direction's both sides.
2. The circuit breaker of claim 1, wherein the two sides of the sector gear in the rotation direction thereof constitute the trigger portion.
3. The circuit breaker of claim 1 or 2, wherein the fixed frame is provided with a relay, and auxiliary contacts of the relay are connected in series on a loop of the motor or connected in parallel on two sides of the motor.
4. A circuit breaker with external isolating switch as claimed in claim 3, wherein the relay and the motor are both arranged on the same side of the holder.
5. A circuit breaker of an external disconnector according to claim 1 or 2 in which the gear segments are mounted on the disconnector spindle by means of a key and keyway fit.
6. The circuit breaker of an external isolating switch according to claim 1 or 2, wherein the fixing frame is provided with a connecting rod perpendicular to the fixing frame, and the fixing frame is assembled on the isolating switch bracket through the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811480831.8A CN109449017B (en) | 2018-12-05 | 2018-12-05 | Circuit breaker with external isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811480831.8A CN109449017B (en) | 2018-12-05 | 2018-12-05 | Circuit breaker with external isolating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109449017A CN109449017A (en) | 2019-03-08 |
| CN109449017B true CN109449017B (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811480831.8A Active CN109449017B (en) | 2018-12-05 | 2018-12-05 | Circuit breaker with external isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109449017B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211822B (en) * | 2019-04-25 | 2021-09-24 | 河南平高电气股份有限公司 | Operating mechanism for electrical switch and electrical switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7053321B2 (en) * | 2003-04-10 | 2006-05-30 | Eaton Corporation | Apparatus operating an isolation switch in coordination with a circuit breaker |
| KR101238912B1 (en) * | 2011-09-08 | 2013-03-06 | 현대중공업 주식회사 | Sector gear and gas-insulated switchgear having the same |
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