CN110911191B - Rear forced interlocking mechanism of vacuum cabinet - Google Patents
Rear forced interlocking mechanism of vacuum cabinet Download PDFInfo
- Publication number
- CN110911191B CN110911191B CN201911197929.7A CN201911197929A CN110911191B CN 110911191 B CN110911191 B CN 110911191B CN 201911197929 A CN201911197929 A CN 201911197929A CN 110911191 B CN110911191 B CN 110911191B
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- cam
- breaker
- arc
- grounding
- isolation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
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- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
A rear forced interlocking mechanism of a vacuum cabinet comprises a rear plate, an isolation cam, an isolation main shaft, a breaker cam, a breaker main shaft, a grounding cam and a grounding main shaft; the isolation cam is arranged on the isolation main shaft, and the isolation main shaft is connected with the isolating switch rotating shaft; the breaker cam is arranged on a breaker main shaft, and the breaker is connected with a breaker switch rotating shaft; the grounding cam is arranged on the grounding main shaft, and the grounding main shaft is connected with the grounding switch rotating shaft; a first interlocking linkage device and a second interlocking linkage device are arranged between the isolating cam and the breaker cam and between the breaker cam and the grounding cam, so that the breaker can not be switched on when the isolating switch is switched off; after the isolating switch is switched on, the breaker can be switched on; after the breaker is switched on, the isolating switch and the grounding switch cannot be operated; and after the grounding switch is switched on, the breaker can not be switched on. The interlocking device has the advantages of simple structure, easy operation and high safety, and can reliably realize the interlocking function among the disconnecting switch, the circuit breaker and the grounding switch and avoid the occurrence of misoperation accidents.
Description
Technical Field
The invention relates to the technical field of power distribution vacuum cabinets, in particular to a rear forced interlocking mechanism of a vacuum cabinet.
Background
The vacuum cabinet is widely applied to a switch station of a power plant, a transformer substation of a power transmission line, a user terminal transformer substation for receiving electric energy and the like. The vacuum cabinet is power distribution equipment, and the cabinet body is internally provided with a circuit breaker, an isolating switch, a grounding switch, a mutual inductor, a lightning arrester, a secondary circuit and the like.
Because the vacuum cabinet is a high-voltage power distribution device, the requirement on the safety level of the vacuum cabinet is high. The state requires that the vacuum cabinet meets the five-prevention requirement, which means that: 1. the isolating switch is prevented from being switched on and off under load; 2. the circuit breaker, the load switch and the contactor are prevented from being switched off and on by mistake; 3. the circuit breaker and the load switch are prevented from being closed when the grounding switch is in a closed position; 4. prevent the earthing switch from being switched on by mistake when electrified; 5. prevent the false entering into the charging chamber.
In traditional vacuum cabinet, isolator, circuit breaker switch and earthing switch interlocking device adopt the transmission mode of linkage, and in the operation process, the card can appear very often and pause, the phenomenon that became invalid even, and then causes operating personnel's maloperation, gives other people the safety and brings very big hidden danger. Therefore, the above problems must be overcome to technically eliminate the potential safety hazard.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rear forced interlocking mechanism of a vacuum cabinet, which has simple and easy operation and high safety performance, can reliably realize the interlocking function among an isolating switch, a breaker switch and a grounding switch and avoid the occurrence of misoperation accidents.
The technical scheme of the invention is that a rear forced interlocking mechanism of a vacuum cabinet with the following structure is provided, and comprises a rear plate, an isolation cam, an isolation main shaft, a breaker cam, a breaker main shaft, a grounding cam and a grounding main shaft; the rear plate is fixedly arranged on the rear side wall of the vacuum cabinet, the isolation cam is fixedly arranged on the isolation main shaft, and the isolation main shaft is positioned at the upper part of the rear plate and penetrates through the rear plate to be connected with a rotating shaft of the isolation switch; the breaker cam is fixedly arranged on a breaker main shaft, and the breaker main shaft is positioned below the isolation main shaft and penetrates through the rear plate to be connected with a switch rotating shaft of the breaker; the grounding cam is fixedly arranged on a grounding main shaft, and the grounding main shaft is positioned below the breaker main shaft and penetrates through the rear plate to be connected with a rotating shaft of the grounding switch; a first interlocking linkage device is arranged between the isolating cam and the breaker cam, and a second interlocking linkage device is arranged between the breaker cam and the grounding cam, so that the breaker can not be switched on when the isolating switch is switched off; after the isolating switch is switched on, the breaker can be switched on; after the breaker is switched on, the isolating switch and the grounding switch can not be operated; and the function that the breaker can not be switched on after the grounding switch is switched on.
The rear-mounted forced interlocking mechanism of the vacuum cabinet comprises a first interlocking linkage device, a second interlocking linkage device and a third interlocking linkage device, wherein the first interlocking linkage device comprises an isolation swing arm and a stop roller, the stop roller is rotatably arranged at the left end of the isolation swing arm, the right end of the isolation swing arm is rotatably arranged on a rear plate, an arc-shaped opening I is formed in the outer peripheral wall of an isolation cam, an arc-shaped opening II is formed in the outer peripheral wall of a breaker cam, and a storage groove for clamping the stop roller is formed between the arc-shaped opening I and the arc-shaped opening II; an arc-shaped convex part I for pressing the stop roller into the arc-shaped opening II is arranged on the outer peripheral wall of the isolation cam positioned on the right side of the arc-shaped opening I; and an arc-shaped convex part II used for pressing the stop roller into the arc-shaped opening I is arranged on the peripheral wall of the breaker cam on the right side of the arc-shaped opening II.
The rear forced interlocking mechanism of the vacuum cabinet comprises a connecting rod and a middle position cam, wherein the middle position cam is positioned above a grounding cam and can be rotatably arranged on a rear plate; an arc-shaped convex part III which is clamped into the arc-shaped opening IV is arranged on the peripheral wall of the middle position cam positioned on the left side of the arc-shaped opening III; an arc-shaped convex part IV clamped into the arc-shaped opening III is arranged on the outer peripheral wall of the grounding cam positioned on the right side of the arc-shaped opening IV; the bottom of the connecting rod is rotatably arranged at the edge of the middle position cam, and the top of the connecting rod is hinged with a driving lever arranged on the peripheral wall of the circuit breaker cam.
The invention relates to a rear-mounted forced interlocking mechanism of a vacuum cabinet, wherein a connecting rod comprises an upper adjusting rod, a stud bolt and a lower adjusting rod, the top of the upper adjusting rod is hinged with a shifting rod, the lower part of the upper adjusting rod is in threaded connection with the upper part of the stud bolt, the lower part of the stud bolt is in threaded connection with the upper part of the lower adjusting rod, and the bottom of the lower adjusting rod is rotatably arranged at the edge of a middle cam.
The invention relates to a rear-mounted forced interlocking mechanism of a vacuum cabinet, wherein an arc-shaped limiting groove I is formed in the outer peripheral wall of an isolation cam, a stop pin I is arranged in the arc-shaped limiting groove I, and the stop pin I is fixedly installed on a rear plate.
The invention relates to a rear-mounted forced interlocking mechanism of a vacuum cabinet, wherein an arc-shaped limiting groove II is formed in the outer peripheral wall of a grounding cam, a stop pin II is arranged in the arc-shaped limiting groove II, and the stop pin II is fixedly installed on a rear plate.
After adopting the structure, compared with the prior art, the rear forced interlocking mechanism of the vacuum cabinet has the following advantages: the invention carries out technical improvement on the existing vacuum cabinet, adds a rear plate, an isolation cam, an isolation main shaft, a breaker cam, a breaker main shaft, a grounding cam and a grounding main shaft on the original basis, and a first interlocking linkage device is arranged between the isolation cam and the breaker cam, and a second interlocking linkage device is arranged between the breaker cam and the grounding cam, thereby realizing that the breaker can not be switched on when the isolating switch is switched off; after the isolating switch is switched on, the breaker can be switched on; after the breaker is switched on, the isolating switch and the grounding switch can not be operated; and the function that the breaker can not be switched on after the grounding switch is switched on. Therefore, the invention adopts pure mechanical interlocking, increases the safety during operation, reliably realizes the interlocking function among the disconnecting switch, the breaker switch and the grounding switch, and avoids the occurrence of misoperation accidents; the invention has the advantages of fewer parts, simple corresponding structure, easy and smooth operation and overcomes the technical problem that the traditional linkage mode is easy to clamp.
Drawings
FIG. 1 is a front view structural diagram of the rear forced interlocking mechanism of the vacuum cabinet when the isolating switch, the breaker switch and the grounding switch are all switched off;
FIG. 2 is a front view structural diagram of the rear forced interlocking mechanism of the vacuum cabinet when the disconnecting switch is switched on and the circuit breaker switch and the grounding switch are both switched off;
FIG. 3 is a front view structural diagram of the rear forced interlocking mechanism of the vacuum cabinet when the disconnecting switch and the breaker switch are both switched on and the grounding switch is switched off;
fig. 4 is a front view structural diagram of the rear forced interlocking mechanism of the vacuum cabinet when the disconnecting switch and the breaker switch are both opened and the grounding switch is closed.
Detailed Description
The following detailed description of the rear forced interlocking mechanism of the vacuum cabinet according to the present invention is provided with reference to the accompanying drawings and the following detailed description:
as shown in fig. 1, in the present embodiment, the vacuum cabinet rear forced interlocking mechanism of the present invention includes a rear plate 10, an isolation cam 12, an isolation spindle 13, a breaker cam 16, a breaker spindle 17, a grounding cam 20, and a grounding spindle 21.
The rear plate 10 is fixedly arranged on the rear side wall of the vacuum cabinet; the isolation cam 12 is fixedly arranged on the isolation main shaft 13; the isolation spindle 13 is located at the upper part of the back plate 10, and passes through the back plate 10 to be connected with a rotating shaft of an isolation switch (not shown in the figure).
The breaker cam 16 is fixedly arranged on a breaker main shaft 17; the breaker main shaft 17 is located below the isolation main shaft 13 and is connected to a switch rotating shaft (not shown) of the breaker through the rear plate 10.
The grounding cam 20 is fixedly arranged on the grounding main shaft 21; the grounding shaft 21 is located below the breaker shaft 17 and is connected to a rotating shaft (not shown) of the grounding switch through the rear plate 10.
A first interlocking linkage is arranged between the isolating cam 12 and the breaker cam 16, and a second interlocking linkage is arranged between the breaker cam 16 and the grounding cam 20. Therefore, when the isolating switch is switched off, the breaker can not be switched on; after the isolating switch is switched on, the breaker can be switched on; after the breaker is switched on, the isolating switch and the grounding switch can not be operated; and the function that the breaker can not be switched on after the grounding switch is switched on.
The first interlocking linkage device comprises an isolation swing arm 14 and a stop roller 15, wherein the stop roller 15 is rotatably arranged at the left end of the isolation swing arm 14, and the right end of the isolation swing arm 14 is rotatably arranged on the rear plate 10 through a pin shaft; be equipped with arc opening I121 on the periphery wall of isolation cam 12, be equipped with arc opening II 161 on the periphery wall of circuit breaker cam 16, enclose the storage tank that supplies locking roller 15 card to go into jointly between arc opening I121 and arc opening II 161.
An arc-shaped convex part I122 used for pressing the stop roller 15 into the arc-shaped opening II 161 is arranged on the outer peripheral wall of the isolating cam 12 on the right side of the arc-shaped opening I121; and an arc-shaped convex part II 162 used for pressing the stop roller 15 into the arc-shaped opening I121 is arranged on the outer peripheral wall of the breaker cam 16 positioned on the right side of the arc-shaped opening II 161.
The second interlocking linkage comprises a connecting rod 18 and a middle cam 19; the middle position cam 19 is positioned above the grounding cam 20 and is rotatably arranged on the rear plate 10 through a pin shaft; an arc-shaped notch III 192 is formed in the peripheral wall of the middle position cam 19, and an arc-shaped notch IV 203 is formed in the peripheral wall of the grounding cam 20.
An arc-shaped convex part III 191 which is clamped into the arc-shaped opening IV 203 is arranged on the outer peripheral wall of the middle position cam 19 positioned on the left side of the arc-shaped opening III 192; an arc-shaped convex part IV 201 which is clamped in the arc-shaped notch III 192 is arranged on the outer peripheral wall of the grounding cam 20 positioned on the right side of the arc-shaped notch IV 203.
The bottom of the link 18 is rotatably mounted at the edge of the neutral cam 19 by a pin, and the top of the link 18 is hinged to a lever 163 disposed on the outer peripheral wall of the breaker cam 16.
In order to improve the flexibility in assembly and use, the present invention designs the connecting rod 18 to have a structure including an upper adjustment rod 181, a stud bolt 182, and a lower adjustment rod 183. The top of the upper adjusting rod 181 is hinged to the shift lever 163 through a pin shaft, the lower portion of the upper adjusting rod 181 is in threaded connection with the upper portion of the stud bolt 182, the lower portion of the stud bolt 182 is in threaded connection with the upper portion of the lower adjusting rod 183, and the bottom of the lower adjusting rod 183 is rotatably mounted at the edge of the middle cam 19 through a pin shaft. Thus, when the breaker is installed or used for a long time, the position of the middle cam 19 can be finely adjusted by screwing the stud 182 when the breaker is opened or closed.
In order to ensure the accuracy of the rotating position of the isolating cam 12, an arc-shaped limiting groove I123 is formed in the outer peripheral wall of the isolating cam 12, a stop pin I11 is arranged in the arc-shaped limiting groove I123, and the stop pin I11 is fixedly installed on the rear plate 10. The stop pin I11 is matched with the arc-shaped limiting groove I123 to limit the isolating cam 12. In order to ensure the accuracy of the rotating position of the grounding cam 20, an arc-shaped limiting groove II 202 is formed in the outer peripheral wall of the grounding cam 20, a stop pin II 22 is arranged in the arc-shaped limiting groove II 202, and the stop pin II 22 is fixedly mounted on the rear plate 10. The stop pin II 22 is matched with the arc-shaped limiting groove II 202 to limit the grounding cam 20. The limiting structure can ensure that the positions of the cams are the same when the brake is switched on and off every time.
The working principle of the invention is as follows:
1. when the isolating switch is opened, the breaker switch can not be closed
Initially, the disconnecting switch, the breaker switch and the grounding switch are all in an open state, which is shown in fig. 1. In actual operation, when the disconnecting switch is opened, the rotating shaft of the disconnecting switch can drive the isolating main shaft 13 and the isolating cam 12 to rotate clockwise, the arc-shaped convex part I122 tightly pushes the stop roller 15 in the arc-shaped opening II 161 along with the action, so that the breaker cam 16 cannot act, namely, the breaker switch cannot be closed under the condition that the disconnecting switch is opened.
2. After the disconnecting switch is switched on, the breaker can be switched on
When the isolating switch is operated to switch on, the rotating shaft of the isolating switch can drive the isolating main shaft 13 to rotate anticlockwise and drive the isolating cam 12 to rotate anticlockwise; when the isolating switch is switched on in place, the arc-shaped opening I121 on the isolating cam 12 is just clamped on the stopping roller 15, and the state shown in figure 2 is shown.
Because redundant space exists between the arc-shaped opening I121 and the arc-shaped opening II 161, the stop roller 15 can swing up and down in the space, so that the cam 16 of the circuit breaker can rotate anticlockwise; when the breaker main shaft 17 anticlockwise rotates under the drive of the breaker switch rotating shaft, the breaker cam 16 also rotates anticlockwise, and at the moment, the breaker switch realizes closing. That is, the circuit breaker can be closed only after the disconnector is closed.
3. After the breaker is closed, the isolating switch and the grounding switch can not be operated
When the breaker is switched on, the arc convex part II 162 can push the stop roller 15 to be dead in the arc opening I121, so that the isolating switch cannot be operated after the breaker is switched on; in the process of closing the circuit breaker, the middle position cam 19 rotates anticlockwise under the pulling of the driving lever 163 and the connecting rod 18, the arc-shaped convex part III 191 on the middle position cam 19 is clamped into the arc-shaped opening IV 203 in a clockwise mode and stays, the grounding cam 20 cannot rotate, and therefore after the circuit breaker is closed, the grounding switch cannot be operated. See the state shown in figure 3 in detail.
4. After the grounding switch is switched on, the circuit breaker can not be switched on
After the breaker switch is switched off, the middle position cam 19 restores the original position, the main shaft of the grounding switch rotates anticlockwise, the grounding main shaft 21 and the grounding cam 20 rotate anticlockwise, the arc-shaped convex part IV 201 is clamped into the arc-shaped opening III 192 in a clockwise mode and stays, the middle position cam 19 and the breaker cam 16 cannot rotate, and therefore the breaker cannot be switched on after the grounding switch is switched on. See the state shown in figure 4 in detail.
The invention relates to a forced interlocking mechanism which is a standby interlocking structure and has the function of preventing misoperation of operators after a front-end interlocking is damaged or fails, thereby preventing safety accidents.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention by those skilled in the art should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. The utility model provides a rearmounted compulsory interlocking device of vacuum cabinet which characterized in that: comprises a back plate (10), an isolation cam (12), an isolation main shaft (13), a breaker cam (16), a breaker main shaft (17), a grounding cam (20) and a grounding main shaft (21);
the rear plate (10) is fixedly arranged on the rear side wall of the vacuum cabinet, the isolation cam (12) is fixedly arranged on an isolation main shaft (13), and the isolation main shaft (13) is positioned on the upper part of the rear plate (10) and penetrates through the rear plate (10) to be connected with a rotating shaft of the isolation switch;
the breaker cam (16) is fixedly arranged on a breaker main shaft (17), and the breaker main shaft (17) is positioned below the isolation main shaft (13) and penetrates through the rear plate (10) to be connected with a switch rotating shaft of the breaker;
the grounding cam (20) is fixedly arranged on a grounding main shaft (21), and the grounding main shaft (21) is positioned below the breaker main shaft (17) and penetrates through the rear plate (10) to be connected with a rotating shaft of the grounding switch;
a first interlocking linkage device is arranged between the isolating cam (12) and the breaker cam (16), and a second interlocking linkage device is arranged between the breaker cam (16) and the grounding cam (20), so that the breaker can not be switched on when the isolating switch is switched off; after the isolating switch is switched on, the breaker can be switched on; after the breaker is switched on, the isolating switch and the grounding switch can not be operated; and the function that the breaker can not be switched on after the grounding switch is switched on.
2. The vacuum cabinet rear positive interlock mechanism of claim 1, wherein: the first interlocking linkage device comprises an isolation swing arm (14) and a stop roller (15), the stop roller (15) is rotatably mounted at the left end of the isolation swing arm (14), the right end of the isolation swing arm (14) is rotatably mounted on the rear plate (10), an arc-shaped opening I (121) is formed in the peripheral wall of the isolation cam (12), an arc-shaped opening II (161) is formed in the peripheral wall of the breaker cam (16), and a storage groove for clamping the stop roller (15) is formed between the arc-shaped opening I (121) and the arc-shaped opening II (161) in a surrounding mode;
an arc-shaped convex part I (122) used for pressing the stop roller (15) into the arc-shaped opening II (161) is arranged on the outer peripheral wall of the isolation cam (12) positioned on the right side of the arc-shaped opening I (121);
and an arc convex part II (162) used for pressing the stop roller (15) into the arc opening I is arranged on the outer peripheral wall of the breaker cam (16) on the right side of the arc opening II (161).
3. The vacuum cabinet rear positive interlock mechanism of claim 1, wherein: the second interlocking linkage device comprises a connecting rod (18) and a middle cam (19), the middle cam (19) is positioned above the grounding cam (20) and is rotatably installed on the rear plate (10), an arc-shaped opening III (192) is formed in the peripheral wall of the middle cam (19), and an arc-shaped opening IV (203) is formed in the peripheral wall of the grounding cam (20);
an arc-shaped convex part III (191) which is clamped into the arc-shaped notch IV (203) is arranged on the outer peripheral wall of the middle position cam (19) positioned on the left side of the arc-shaped notch III (192);
an arc-shaped convex part IV (201) which is clamped into the arc-shaped opening III (192) is arranged on the outer peripheral wall of the grounding cam (20) which is positioned on the right side of the arc-shaped opening IV (203);
the bottom of the connecting rod (18) is rotatably arranged at the edge of the middle position cam (19), and the top of the connecting rod (18) is hinged with a driving lever (163) arranged on the peripheral wall of the breaker cam (16).
4. The vacuum cabinet rear positive interlock mechanism of claim 3, wherein: the connecting rod (18) comprises an upper adjusting rod (181), a stud bolt (182) and a lower adjusting rod (183), the top of the upper adjusting rod (181) is hinged to a shifting rod (163), the lower portion of the upper adjusting rod (181) is in threaded connection with the upper portion of the stud bolt (182), the lower portion of the stud bolt (182) is in threaded connection with the upper portion of the lower adjusting rod (183), and the bottom of the lower adjusting rod (183) is rotatably installed at the edge of the middle cam (19).
5. The vacuum cabinet rear forced interlocking mechanism according to any one of claims 1 to 4, characterized in that: be equipped with arc spacing groove I (123) on the periphery wall of isolation cam (12), be equipped with in arc spacing groove I (123) backing pin I (11), backing pin I (11) fixed mounting is on back plate (10).
6. The vacuum cabinet rear forced interlocking mechanism according to any one of claims 1 to 4, characterized in that: the grounding cam is characterized in that an arc-shaped limiting groove II (202) is formed in the peripheral wall of the grounding cam (20), a stop pin II (22) is arranged in the arc-shaped limiting groove II (202), and the stop pin II (22) is fixedly installed on the rear plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197929.7A CN110911191B (en) | 2019-11-29 | 2019-11-29 | Rear forced interlocking mechanism of vacuum cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197929.7A CN110911191B (en) | 2019-11-29 | 2019-11-29 | Rear forced interlocking mechanism of vacuum cabinet |
Publications (2)
| Publication Number | Publication Date |
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| CN110911191A CN110911191A (en) | 2020-03-24 |
| CN110911191B true CN110911191B (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911197929.7A Active CN110911191B (en) | 2019-11-29 | 2019-11-29 | Rear forced interlocking mechanism of vacuum cabinet |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11476647B1 (en) * | 2021-04-22 | 2022-10-18 | Rockwell Automation Technologies, Inc. | Maintenance grounding device in motor control center with integrated interlock system |
| CN113284748B (en) * | 2021-04-27 | 2024-02-13 | 泉州七星电气有限公司 | Forced interlocking structure for vacuum cabinet |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337405B (en) * | 2013-06-04 | 2015-06-24 | 宁波舜利高压开关科技有限公司 | A three-position mechanism with reclosing and grounding closing functions and an operation method thereof |
| KR101522265B1 (en) * | 2013-10-16 | 2015-05-21 | 엘에스산전 주식회사 | Voltage transformer room door interlock device of panel for vacuum circuit breaker |
| CN203983124U (en) * | 2014-07-25 | 2014-12-03 | 浙江格立特电气设备有限公司 | The operating mechanism of the box fixing high-tension switch cabinet of miniaturization |
| CN204045442U (en) * | 2014-07-31 | 2014-12-24 | 福建逢兴机电设备有限公司 | A kind of interlocking gear |
| CN204991517U (en) * | 2015-08-06 | 2016-01-20 | 宁波格力特电气科技有限公司 | Three station spring -operated mechanisms |
| CN207966797U (en) * | 2018-04-13 | 2018-10-12 | 浙江恒控电气有限公司 | Breaker and disconnecting switch, the interlocking mechanism of earthing switch |
| CN109859972B (en) * | 2018-12-14 | 2020-09-11 | 北京双杰电气股份有限公司 | Forced interlocking structure for vacuum cabinet |
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