CN109360753B - Mechanical interlocking device of medium-voltage dual-power automatic change-over switch and dual-power device - Google Patents
Mechanical interlocking device of medium-voltage dual-power automatic change-over switch and dual-power device Download PDFInfo
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- CN109360753B CN109360753B CN201811317450.8A CN201811317450A CN109360753B CN 109360753 B CN109360753 B CN 109360753B CN 201811317450 A CN201811317450 A CN 201811317450A CN 109360753 B CN109360753 B CN 109360753B
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- breaker
- rod
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- 238000004146 energy storage Methods 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention provides a mechanical interlocking device applied to a medium-voltage dual-power automatic change-over switch, which comprises a mounting frame, a first rotating shaft and a second rotating shaft, wherein the mounting frame is provided with a first rotating shaft and a second rotating shaft; the end part of the first rotating shaft is connected with a first connecting piece, the first connecting piece is connected with the main shaft extension part of the first circuit breaker, the first connecting piece is also hinged with a first connecting rod, and the first connecting rod is hinged with a first lever; the structural arrangement of the second rotating shaft is symmetrical to the first rotating shaft; the first lever and the second lever are also arranged in an X-shaped cross way, the crossing part of the first lever and the second lever is connected to a lever rotating shaft, and the lever rotating shaft is arranged on the mounting frame; the free end of the first lever is also connected with a first limiting part which limits the rotation of a second tripping traction rod on the second circuit breaker; the structure of the second lever is symmetrical to the first lever. The invention also provides a dual-power supply device. Compared with the prior art, the invention effectively solves the problem of circuit safety caused by easy failure of the electric interlocking device in the prior art.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a mechanical interlocking device and a dual-power device applied to a medium-voltage dual-power automatic change-over switch.
Background
The double-power supply device is generally composed of two vacuum circuit breakers, and the conventional situation of the double-power supply device is that the two circuit breakers are electrically interlocked, when one circuit breaker is switched on, the other circuit breaker can not be switched on, but still the switching-on action of the other circuit breaker can be carried out through external manual operation.
In addition, because electronic components such as contacts fail, or travel in-place indication fails, the whole electrical interlock scheme can fail to cause misoperation, so that two circuit breakers are simultaneously closed.
The two circuit breakers are switched on simultaneously to cause instability of the circuit, so that in order to ensure the safety of the circuit, it is necessary to ensure that the two circuit breakers cannot be switched on simultaneously.
Disclosure of Invention
In view of the above, the invention provides a mechanical interlocking device and a dual-power device applied to a medium-voltage dual-power automatic transfer switch, which aim to solve the problem of circuit safety caused by easy failure of an electrical interlocking device in the prior art.
In one aspect, the invention provides a mechanical interlocking device applied to a medium-voltage dual-power automatic change-over switch, which comprises a mounting frame, wherein a first rotating shaft and a second rotating shaft which are symmetrical are arranged on the mounting frame;
the end part of the first rotating shaft is connected with a first connecting piece, the first connecting piece is connected with a first breaker spindle extension part on the first breaker, the first connecting piece is also hinged with a first connecting rod, and the first connecting rod is hinged with a first lever;
the end part of the second rotating shaft is connected with a second connecting piece, the second connecting piece is connected with a second breaker spindle extension part on the second breaker, the second connecting piece is also hinged with a second connecting rod, and the second connecting rod is hinged with a second lever:
the first connecting rod and the second connecting rod are symmetrically arranged, the first lever and the second lever are also arranged in an X-shaped cross way, the crossing part of the first lever and the second lever is connected to a lever rotating shaft, and the lever rotating shaft is arranged on the mounting frame;
the free end of the first lever is also connected with a first limiting part, the first limiting part limits the rotation of a second tripping traction rod on the second circuit breaker, and the second circuit breaker in an energy storage state is unlocked after the second tripping traction rod rotates;
the free end of the second lever is also connected with a second limiting part, the second limiting part limits the rotation of the first tripping traction rod on the first circuit breaker, and the first circuit breaker in the energy storage state is unlocked after the first tripping traction rod rotates.
Further, the first connecting piece is a clamping piece clamped with the extending part of the main shaft of the first circuit breaker.
Further, the first connecting piece is a block body, a first rectangular clamping groove is formed in the first connecting piece, the first breaker main shaft extending portion is a rectangular clamping block clamped with the first rectangular clamping groove, the block body is provided with a first connecting plate extending outwards, and the first connecting plate is hinged with the first connecting rod.
Further, the second connecting piece is a clamping piece clamped with the second breaker main shaft extension part.
Further, the second connecting piece is a block body, a second rectangular clamping groove is formed in the second connecting piece, the second breaker main shaft extension portion is a rectangular clamping block clamped with the second rectangular clamping groove, the block body is provided with a second connecting plate extending outwards, and the second connecting plate is hinged with the second connecting rod.
Further, the first limiting part is a push rod.
Further, the first trip traction rod is an L-shaped rod body.
Further, the second limiting part is a push rod.
Further, the second trip traction rod is an L-shaped rod body.
In another aspect, the invention provides a dual-power device, which is characterized by comprising a first circuit breaker and a second circuit breaker, and further comprising the mechanical interlocking device applied to the medium-voltage dual-power automatic change-over switch.
Compared with the prior art, the mechanical interlocking device and the double-power device for the medium-voltage double-power automatic change-over switch change the original electrical interlocking scheme, and adopt the mechanical interlocking device formed by the components such as the rotating shaft, the connecting rod, the lever and the like, when one of the circuit breakers is in a switching-on state, the other circuit breaker can only be in a switching-off or energy storage state and cannot be switched on, namely, the two circuit breakers cannot be switched on at the same time, so that the safety and the reliability of a circuit are ensured, and the problem of circuit safety caused by easy failure of the electrical interlocking device in the prior art is effectively solved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of a circuit breaker in a breaking (energy storage) state in a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a circuit breaker in a closing state in a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram (not connected with a breaker) of a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch in a brake-off (energy storage) state according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram (not connected with a circuit breaker) of a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch in a closing state according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram (connected to a circuit breaker) of a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch in a closing state according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram (connecting breaker) of a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch in a brake-off (energy storage) state according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a dual power device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1 to 6, a mechanical interlocking device applied to a medium-voltage dual-power automatic transfer switch provided by an embodiment of the present invention is shown, and the structure and the installation manner adopted by the mechanical interlocking device are as follows.
Referring to fig. 3 to 6, a mounting frame 1 is first provided, and a first rotating shaft 11 and a second rotating shaft 12 are symmetrically provided on the mounting frame 1; in particular, in order to facilitate the installation between two circuit breakers, namely between the first circuit breaker 2 and the second circuit breaker 3, the mounting frame 1 is specifically configured as a rectangular frame, and the first rotary shaft 11 and the second rotary shaft 12 are specifically symmetrically installed on opposite sides of the rectangular frame.
Referring to fig. 1 to 6, a first connection member 111 is then connected to an end of the first rotation shaft 11, the first connection member 111 being connected to a first breaker main shaft extension 21 of the first breaker 2, the first connection member 111 being further hinged to the first link 13, the first link 13 being hinged to the first lever 131.
The first connecting piece 111 is a clamping piece that is clamped with the first breaker main shaft extension portion 21. More specifically, the first connecting member 111 may be a block body, on which a first rectangular clamping groove 112 is formed, the first breaker spindle extension 21 is a rectangular clamping block clamped with the first rectangular clamping groove 112, and the block body has a first connecting plate 113 extending outwards, and the first connecting plate 113 is hinged with the first connecting rod 13. By the arrangement of this structure, a quick connection between the first connection piece and the first circuit breaker can be facilitated.
With continued reference to fig. 1 to 6, a second connecting member 121 is connected to the end of the second rotary shaft 12, the second connecting member 121 being connected to the second breaker spindle extension 31 of the second breaker 3, the second connecting member 121 being further hinged to the second link 14, the second link 14 being hinged to the second lever 141.
The second connecting piece 121 is a clamping piece that is clamped with the second breaker main shaft extension 31. More specifically, the second connecting piece 121 may be a block, on which a second rectangular clamping groove 122 is formed, and the second breaker spindle extension 31 is a rectangular clamping block clamped with the second rectangular clamping groove 122, and the block has a second connecting plate 123 extending outwards, and the second connecting plate 123 is hinged with the second connecting rod 14. By the arrangement of this structure, a quick connection between the second connection piece and the second circuit breaker can be facilitated.
Referring to fig. 3 to 6, the first link 13 and the second link 14 are also symmetrically arranged, the first lever 131 and the second lever 141 are also in an X-shaped cross arrangement, the intersection of the first lever 131 and the second lever 141 is connected to the lever rotation shaft 15, and the lever rotation shaft 15 is mounted on the mounting frame 1; the arrangement of the structure can form balance when the first lever and the second lever move.
Referring to fig. 1 to 6, a first limiting part 132 is then further connected to the free end of the first lever 131, and the first limiting part 132 limits the rotation of the second trip traction lever 32 on the second circuit breaker 3, so that the second circuit breaker 3 in the stored energy state is unlocked after the second trip traction lever 32 rotates, thereby realizing the control of the circuit breaker.
Specifically, the first limiting portion 132 is a push rod, the first trip traction rod 22 is an L-shaped rod body push rod with a larger stress surface and partially exposed, and can accurately push the stress surface of the first trip traction rod, so that the first trip traction rod can be unlocked by applying force to be connected to a locking device inside the circuit breaker.
With continued reference to fig. 1 to 6, a second limiting portion 142 is also connected to the free end of the second lever 141, and the second limiting portion 142 limits the rotation of the first trip traction lever 22 on the first circuit breaker 2, so that the first circuit breaker 2 in the energy storage state is unlocked after the first trip traction lever 22 rotates.
Specifically, the second limiting portion 142 is a push rod, the second trip traction rod 32 is an L-shaped rod body push rod which is partially exposed and has a larger stress surface, and can accurately push the stress surface of the second trip traction rod, so that the second trip traction rod can be unlocked by applying force to be connected to a locking device inside the circuit breaker.
Referring to fig. 7, there is shown a dual power supply device according to an embodiment of the present invention, which includes a first circuit breaker 2 and a second circuit breaker 3, and further includes a mechanical interlocking device for a medium voltage dual power supply automatic change-over switch as described above.
As shown in fig. 1, in the open or stored state, the breaker spindle extension is in a horizontal position; as shown in fig. 2, the breaker spindle extension is rotated to a fixed angle when the breaker is in closing.
As shown in fig. 5 to 6, after two circuit breakers are pushed into the cabinet body, the main shaft extension part on the circuit breakers is clamped into the rectangular clamping groove of the connecting piece on the interlocking mechanical device, one end of the connecting piece is provided with a round hole connected with the connecting rod, a shaft pin is arranged in the round hole and connected with the connecting rod, the other end of the connecting rod is connected with the shaft pin for the lever, a round hole is arranged in the middle of the lever and connected with the shaft pin for the mounting hole arranged on the mechanical device, and when the connecting piece with the clamping groove rotates, the connecting rod is driven to pull up and down; the connecting rod moves up and down to drive the lever to rotate around the middle round hole.
As shown in fig. 1 to 7, before the circuit breaker is not pushed into the cabinet, the rotating shafts on two sides of the interlocking device are twisted to the lowest under the torsion action of the spring, and the clamping groove on the rotating shaft reaches a horizontal position, namely, is in a synchronous state with the extension part of the main shaft on the circuit breaker in the opening state. Two broken circuits in a breaking state are pushed into the cabinet body, and the two circuit breakers can both perform energy storage operation. Operating the breaker 1 shown in fig. 7 to close, wherein a main shaft extension part on the breaker 1 drives a connecting piece with a clamping groove on a mechanical interlocking device to rotate; as shown in fig. 5, the connecting piece rotates to drive the connecting rod to move upwards, and the connecting rod moves upwards to push one end of the lever connected with the connecting rod to move upwards, so that the other end of the lever moves downwards around the rotation center of the lever; when one end of the lever close to the other breaker moves downwards, the ejector rod arranged at the other end of the lever moves downwards to the rear of the traction rod of the breaker. At this time, the push rod moved to the rear of the drawbar of the circuit breaker can prevent the drawbar from rotating backward. When the breaker in the energy storage state is switched on, the breaker must be unlocked by means of backward rotation of the traction rod, and the action is limited by the jacking rod. That is, the circuit breaker cannot be closed at this time. Finally, when one circuit breaker is switched on, the other circuit breaker can only be in the action of switching off or storing energy and cannot be switched on at the same time.
Therefore, compared with the prior art, the mechanical interlocking device and the dual power supply device for the medium-voltage dual-power supply automatic change-over switch change the original electrical interlocking scheme, the mechanical interlocking device formed by the components such as the rotating shaft, the connecting rod and the lever is adopted, when one of the circuit breakers is in a closing state, the other circuit breaker can only be in a separating brake or energy storage state and cannot be subjected to closing operation, namely, the two circuit breakers cannot be simultaneously closed, so that the safety and the reliability of a circuit are ensured, and the problem of circuit safety caused by easy failure of the electrical interlocking device in the prior art is effectively solved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The mechanical interlocking device for the medium-voltage double-power-supply automatic change-over switch is characterized by comprising a mounting frame (1), wherein a first rotating shaft (11) and a second rotating shaft (12) which are symmetrical are arranged on the mounting frame (1);
a first connecting piece (111) is connected to the end part of the first rotating shaft (11), the first connecting piece (111) is connected with a first breaker main shaft extension part (21) on the first breaker (2), the first connecting piece (111) is also hinged with a first connecting rod (13), and the first connecting rod (13) is hinged with a first lever (131); the first connecting piece (111) is a clamping piece clamped with the first breaker spindle extension (21);
a second connecting piece (121) is connected to the end part of the second rotating shaft (12), the second connecting piece (121) is connected with a second breaker main shaft extension part (31) on the second breaker (3), the second connecting piece (121) is also hinged with a second connecting rod (14), and the second connecting rod (14) is hinged with a second lever (141); the second connecting piece (121) is a clamping piece clamped with the second breaker main shaft extension part (31);
the first connecting rod (13) and the second connecting rod (14) are symmetrically arranged, the first lever (131) and the second lever (141) are also arranged in an X-shaped cross manner, the cross part of the first lever (131) and the second lever (141) is connected to a lever rotating shaft (15), and the lever rotating shaft (15) is arranged on the mounting frame (1);
the free end of the first lever (131) is also connected with a first limit part (132), the first limit part (132) limits the rotation of a second tripping traction rod (32) on the second circuit breaker (3), and the second circuit breaker (3) in an energy storage state is unlocked after the second tripping traction rod (32) rotates;
the free end of the second lever (141) is also connected with a second limiting part (142), the second limiting part (142) limits the rotation of the first tripping traction rod (22) on the first circuit breaker (2), and the first circuit breaker (2) in an unlocking energy storage state after the first tripping traction rod (22) rotates.
2. The mechanical interlocking device for the medium-voltage dual-power automatic transfer switch according to claim 1, wherein the first connecting piece (111) is a block body, a first rectangular clamping groove (112) is formed in the first connecting piece, the first breaker main shaft extension portion (21) is a rectangular clamping block clamped with the first rectangular clamping groove (112), the block body is provided with a first connecting plate (113) extending outwards, and the first connecting plate (113) is hinged with the first connecting rod (13).
3. The mechanical interlocking device for the medium-voltage dual-power automatic transfer switch according to claim 2, wherein the second connecting piece (121) is a block body, a second rectangular clamping groove (122) is formed in the second connecting piece, the second breaker spindle extension portion (31) is a rectangular clamping block clamped with the second rectangular clamping groove (122), the block body is provided with a second connecting plate (123) extending outwards, and the second connecting plate (123) is hinged with the second connecting rod (14).
4. The mechanical interlocking device for a medium-voltage dual-power automatic transfer switch according to claim 1, wherein the first limiting part (132) is a push rod.
5. A mechanical interlocking device for a medium voltage dual power automatic transfer switch according to claim 1, wherein the first trip traction bar (22) is an L-shaped bar body.
6. The mechanical interlocking device for a medium-voltage dual-power automatic transfer switch according to claim 1, wherein the second limiting part (142) is a push rod.
7. The mechanical interlocking device for a medium-voltage dual-power automatic transfer switch according to claim 1, wherein the second trip traction rod (32) is an L-shaped rod body.
8. A dual power supply device, characterized by comprising a first circuit breaker (2) and a second circuit breaker (3), and further comprising a mechanical interlocking device for a medium voltage dual power supply automatic change-over switch according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317450.8A CN109360753B (en) | 2018-11-06 | 2018-11-06 | Mechanical interlocking device of medium-voltage dual-power automatic change-over switch and dual-power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317450.8A CN109360753B (en) | 2018-11-06 | 2018-11-06 | Mechanical interlocking device of medium-voltage dual-power automatic change-over switch and dual-power device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109360753A CN109360753A (en) | 2019-02-19 |
| CN109360753B true CN109360753B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317450.8A Active CN109360753B (en) | 2018-11-06 | 2018-11-06 | Mechanical interlocking device of medium-voltage dual-power automatic change-over switch and dual-power device |
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| Country | Link |
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| CN (1) | CN109360753B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459420B (en) * | 2019-07-29 | 2024-03-15 | 安士缔(中国)电气设备有限公司 | Special medium-voltage dual-power switching device with mechanical interlocking function |
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| CN2701146Y (en) * | 2004-06-08 | 2005-05-18 | 江苏凯帆电器有限公司 | Operating mechanism with double power supply and single motor |
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| EP3301698A2 (en) * | 2016-09-30 | 2018-04-04 | Schneider Electric Industries SAS | Mechanical interlock, dual power supply switching device, and method for operating the same |
| CN209561230U (en) * | 2018-11-06 | 2019-10-29 | 安士缔(中国)电气设备有限公司 | The mechanical interlocking device and Dual-power device of middle pressure double power supply automatic switching switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10062527B2 (en) * | 2016-06-28 | 2018-08-28 | Eaton Intelligent Power Limited | Transfer switches with dual mechanism control and related assemblies and methods |
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2018
- 2018-11-06 CN CN201811317450.8A patent/CN109360753B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2701146Y (en) * | 2004-06-08 | 2005-05-18 | 江苏凯帆电器有限公司 | Operating mechanism with double power supply and single motor |
| CN204243583U (en) * | 2014-12-01 | 2015-04-01 | 施耐德电气华电开关(厦门)有限公司 | A kind of vacuum circuit-breaker handcart switched for middle pressure duplicate supply |
| CN105336524A (en) * | 2015-09-28 | 2016-02-17 | 上海广电电气(集团)股份有限公司 | Dual power supply circuit breaker cabinet powered mechanical interlocking mechanism |
| EP3301698A2 (en) * | 2016-09-30 | 2018-04-04 | Schneider Electric Industries SAS | Mechanical interlock, dual power supply switching device, and method for operating the same |
| CN206283315U (en) * | 2016-12-20 | 2017-06-27 | 佛山奇正电气有限公司 | A kind of dual power supply switching electrical equipment electricity cabinet |
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| CN109360753A (en) | 2019-02-19 |
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