CN107731615B - Novel isolating and grounding switch for cable branch box - Google Patents
Novel isolating and grounding switch for cable branch box Download PDFInfo
- Publication number
- CN107731615B CN107731615B CN201711113763.7A CN201711113763A CN107731615B CN 107731615 B CN107731615 B CN 107731615B CN 201711113763 A CN201711113763 A CN 201711113763A CN 107731615 B CN107731615 B CN 107731615B
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- grounding
- interlocking
- switch
- isolating
- isolation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/10—Interlocking mechanisms for interlocking two or more switches
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- Switch Cases, Indication, And Locking (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a switch, in particular to a novel isolating and grounding switch for a cable branch box, and belongs to the technical field of electrical equipment. An operation panel is arranged on one side of a shell, an isolation static knife, an isolation switch operation shaft, a grounding static knife and a grounding switch operation shaft which are parallel to each other are sequentially arranged in the shell positioned on the back of the operation panel from top to bottom, an isolation interlocking cam and a grounding interlocking cam are arranged at one end, penetrating through the shell, of the isolation switch operation shaft and the grounding switch operation shaft, a first interlocking plate and a second interlocking plate are arranged between the isolation switch operation shaft and the grounding switch operation shaft, the first interlocking plate is fixed on the back of the operation panel through a fulcrum pin, the second interlocking plate is fixed on the back of the operation panel through a guide screw, an interlocking pin is arranged at the bottom of the operation panel through a bent plate, the isolation switch operation shaft is linked with an isolation movable knife through a pull rod, and the grounding switch operation shaft is connected with a. The isolation and grounding switch can be quickly switched on and off.
Description
Technical Field
The invention relates to a switch, in particular to a novel isolating and grounding switch for a cable branch box, and belongs to the technical field of electrical equipment.
Background
A40.5 kilovolt American box transformer substation adopts a load switch soaked in transformer oil, and due to the fact that the load switch has no visible fracture, the formal electrification condition of a cable side cannot be judged in actual operation or overhaul, and personal safety of operation and maintenance personnel is seriously threatened. At present, the American box transformer substation requires to be additionally provided with a cable branch box, and the cable branch box is provided with an isolation switch and a grounding switch so as to form a visible isolation fracture and ensure the personal safety of operation and maintenance personnel. But is suitable for isolating and grounding switches arranged in a cable branch box, and related products with convenient operation and perfect interlocking do not exist in the market.
Disclosure of Invention
The invention aims to provide a novel isolating and grounding switch for a cable branch box, which is reliable in interlocking and convenient to operate, aiming at the defect of inconvenient operation in the prior art.
The invention solves the technical problem by the following technical scheme: a novel isolation and grounding switch for a cable branch box comprises a shell, wherein an operating panel is arranged on one side of the shell, an isolation static knife, an isolation switch operating shaft, a grounding static knife and a grounding switch operating shaft which are parallel to each other are sequentially arranged in the shell positioned on the back of the operating panel from top to bottom, an isolation interlocking cam and a grounding interlocking cam are arranged at one end, penetrating through the shell, of the isolation switch operating shaft and the grounding switch operating shaft, an interlocking plate I and an interlocking plate II are arranged between the isolation switch operating shaft and the grounding switch operating shaft, the interlocking plate I is fixed on the back of the operating panel through a fulcrum pin, the interlocking plate II is fixed on the back of the operating panel through a guide screw, an interlocking pin is arranged at the bottom of the operating panel through a bent plate, the isolation switch operating shaft is linked with an isolation movable knife through a pull rod, and the grounding movable knife is connected with the, and the operation panel is provided with an isolating switch operation hole and a grounding switch operation hole which correspond to the isolating switch operation shaft and the grounding switch operation shaft in position.
Further, the second interlocking plate is located between the isolating interlocking cam and the grounding interlocking cam, the second interlocking plate is located on the front side of the first interlocking plate, and one end of the interlocking pin is close to the grounding interlocking cam.
An isolation quick-action pressure spring is arranged at one end, close to the shell, of the isolation switch operating shaft, one end of the isolation quick-action pressure spring is connected with the isolation switch operating shaft, and the other end of the isolation quick-action pressure spring is connected with the inner side of the shell; the other end that the earthing switch operating shaft passed the casing is equipped with the ground connection rapid actuation pressure spring, the earthing switch operating shaft is connected to the one end of ground connection rapid actuation pressure spring, and the casing outside is connected to the other end to realize closing fast, separating brake.
Contact springs are arranged on the isolating movable cutter and the grounding movable cutter, so that certain contact pressure is ensured.
The bottom of the first interlocking plate is provided with a reset tension spring connected with the shell, so that after the disconnecting switch is disconnected, the first interlocking plate is reset to expose the grounding switch operation hole, and the grounding switch can be operated after the disconnecting switch is disconnected.
And the interlocking plate rotates around the fulcrum pin until the switch operation hole is blocked for interlocking.
The interlocking pin is fixed in the operation panel through the bent plate, one end of the interlocking pin is provided with a pressure spring connected with the shell, the interlocking pin resets under the action of the pressure spring, and the box body door can be opened for maintenance after the grounding switch is switched on.
When the isolating switch is in a closing state, the isolating switch lock cam pushes the interlocking plate I to rotate, and the interlocking plate I blocks the grounding switch operating hole to prevent the grounding switch from being electrified; when the isolating switch is in a switching-off state, the interlocking plate is reset through the reset tension spring, and the grounding switch operation hole is exposed.
When the grounding switch is in a closing state, the grounding interlocking cam pushes the interlocking plate II to move upwards, the interlocking plate II blocks the operation hole of the isolating switch, the isolating switch is prevented from being closed in the grounding state, the interlocking pin is separated from the grounding interlocking cam, and the box body door can be opened for maintenance only by resetting of the pressure spring.
The invention has the advantages that: the novel design, the structure is ingenious, and spare part is small in quantity, realizes keeping apart, ground connection fast branch, closes a floodgate, and isolator and earthing switch contact meshing are reliable, and isolator and earthing switch operation have the perfect mechanical "five prevent" interlocking of not damaged.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of the structure in the direction of a-a in fig. 1.
Fig. 3 is a schematic structural diagram of the operation panel in fig. 2.
Fig. 4 is a reference diagram of a use state of fig. 1.
Fig. 5 is a schematic view of the structure in the direction of a-a in fig. 4.
Fig. 6 is another use state reference diagram of fig. 1.
Fig. 7 is a schematic view of the structure in the direction of a-a of fig. 6.
Fig. 8 is a partial structural view of fig. 1.
Fig. 9 is a side view of fig. 8.
Fig. 10 is a rear view of fig. 8.
Fig. 11 is a perspective view of the present invention.
Fig. 12 is a rear view of fig. 11.
The labels in the figure are as follows: the automatic interlocking device comprises a shell 1, a static isolating knife 2, a quick-acting isolating pressure spring 3, an operating panel 4, an interlocking isolating cam 5, an isolating switch operating shaft 6, an isolating moving knife 7, an isolating moving knife 8, a moving knife contact spring 9, an interlocking grounding cam 10, an operating grounding switch shaft 11, a moving knife grounding 12, a moving knife contact spring grounding 13, a quick-acting grounding pressure spring 14, a reset tension spring 14, a first interlocking plate 15, a fulcrum pin 16, a second interlocking plate 17, an operating isolating switch operating pull rod 18, a static grounding knife 19, an insulator 20, an interlocking pin 21, a bent plate 22, a pressure spring 23, a guide screw 24, an isolating switch operating hole 25 and an operating grounding switch hole 26.
Detailed Description
Examples
The isolating and grounding switch of the present embodiment is shown in fig. 1-7 and fig. 11-12, and the detailed interlock is shown in fig. 8-10. A novel isolation and grounding switch for a cable branch box comprises a shell 1, wherein an operation panel 4 is arranged on one side of the shell 1, an isolation static knife 2, an isolation switch operation shaft 6, a grounding static knife 19 and a grounding switch operation shaft 10 which are parallel to each other are sequentially arranged in the shell 1 positioned on the back of the operation panel 4 from top to bottom, one end, penetrating through the shell 1, of the isolation switch operation shaft 6 and one end, penetrating through the shell 10, of the grounding switch operation shaft 10 are respectively provided with an isolation interlocking cam 5 and a grounding interlocking cam 9, an interlocking plate I15 and an interlocking plate II 17 are arranged between the isolation switch operation shaft 6 and the grounding switch operation shaft 10, the interlocking plate II 17 is positioned between the isolation interlocking cam 5 and the grounding interlocking cam 9, the interlocking plate I15 is fixed on the back of the operation panel 4 through a fulcrum pin 16, the interlocking plate II 17 is positioned between the isolation interlocking cam 5 and the grounding interlocking cam 9, the interlocking plate II 17 is positioned on the front side of the plate I15 and, the operation panel 4 is provided with an interlocking pin 21 through a bent plate 22, one end of the interlocking pin 21 is close to the grounding interlocking cam 9, the disconnecting switch operation shaft 6 is in linkage with the disconnecting moving blade 7 through the disconnecting switch operation pull rod 18, the grounding switch operation shaft 10 is connected with the grounding moving blade 11, and the operation panel 4 is respectively provided with a disconnecting switch operation hole 25 and a grounding switch operation hole 26 corresponding to the disconnecting switch operation shaft 6 and the grounding switch operation shaft 10. The one end that is close to casing 1 on the isolator operating shaft 6 is equipped with keeps apart quick action pressure spring 3, keeps apart the one end of quick action pressure spring 3 and connects isolator operating shaft 6, and casing 1 inboard is connected to the other end, and earthing switch operating shaft 10 passes the other end of casing 1 and is equipped with ground connection quick action pressure spring 13, and earthing switch operating shaft 10 is connected to the one end of ground connection quick action pressure spring 13, and the casing 1 outside is connected to the other end, realizes closing fast, separating brake. The isolating moving blade 7 is provided with an isolating moving blade contact spring 8, and the grounding moving blade 11 is provided with a grounding switch contact spring 12, so that certain contact pressure is ensured. The bottom of the first interlocking plate 15 is provided with a reset tension spring 14 connected with the shell 1, so that after the disconnecting switch is switched off, the first interlocking plate 15 is reset, the grounding switch operation hole 26 is exposed, and the grounding switch can be operated after the disconnecting switch is switched off. The interlocking pin 21 is fixed on the operation panel 4 through a bent plate 22, the interlocking pin is provided with a pressure spring 23, the interlocking pin is reset under the action of the pressure spring, and the box body door can be opened for maintenance only after the grounding switch is switched on. The isolation static knife 2 and the grounding static knife 19 are respectively fixed on the shell 1 through insulators 20, so that the insulation distance between the high-voltage charged body and the shell (ground) is ensured.
Power transmission operation:
the initial state of the product is as follows: the disconnecting switch is opened and the grounding switch is closed, as shown in the attached figures 6-7. The grounding switch operating shaft 10 is operated anticlockwise through the handle, the grounding moving knife 11 moves anticlockwise, and the grounding switch is rapidly opened under the action of the grounding rapid-action pressure spring 13; meanwhile, the grounding interlocking cam 9 sleeved on the grounding switch operating shaft 10 also rotates anticlockwise, so that the second interlocking plate 17 moves downwards to expose the isolating switch operating hole, and the product state is as follows: the disconnecting switch is opened, and the grounding switch is opened, as shown in the attached figures 1-3; the isolating switch operating shaft 6 is operated clockwise through the handle, the isolating movable knife 7 moves clockwise, the isolating switch is quickly switched on under the action of the isolating quick-action pressure spring 4, and the isolating movable knife pressure spring 8 ensures that the isolating movable knife 7 is reliably meshed with the isolating static knife 2; meanwhile, the isolation interlocking cam 5 sleeved on the isolation switch operating shaft 6 also rotates clockwise, and pushes the interlocking plate I15 to rotate clockwise around the linkage fulcrum 16, so that an earthing switch operating hole is blocked, and an earthing switch is prevented from being electrified and connected. The product state at this time is: the disconnecting switch is switched on, and the grounding switch is switched off, as shown in the attached figures 4-5.
And (3) power failure operation:
the initial state of the product is as follows: the disconnecting switch is switched on, and the grounding switch is switched off, as shown in the attached figures 4-5. The grounding switch operating hole is blocked by the second interlocking plate 17, only the disconnecting switch is separated firstly, the disconnecting switch operating shaft 6 is operated anticlockwise through the handle, the isolating moving blade 7 moves anticlockwise, and the disconnecting switch is opened quickly under the action of the isolating quick-action pressure spring 4; simultaneously, the isolation interlocking cam 5 of cover on isolator operating axis 6 also anticlockwise rotates, and interlocking plate 15 is around 16 anticlockwise rotations of fulcrum round pin under 14 effects of extension spring that resets, exposes earthing switch handle hole, the product state this moment: the disconnecting switch is opened, and the grounding switch is opened, as shown in the attached figures 1-3; the grounding switch operating shaft 10 is operated clockwise through the handle, the grounding movable knife 11 moves clockwise, the grounding switch is quickly switched on under the action of the grounding quick-action pressure spring 13, and the grounding movable knife pressure spring 12 ensures that the grounding movable knife 11 is reliably meshed with the grounding static knife 19; meanwhile, the grounding interlocking cam 9 sleeved on the grounding switch operating shaft 10 also rotates clockwise, so that the second interlocking plate 17 moves upwards along the guide screw 24 to block an operating hole of the isolating switch, the isolating switch is prevented from being closed under the switching-on state of the grounding switch, and meanwhile, in the rotating process of the grounding interlocking cam 9, the interlocking pin 21 fixed on the operating panel 4 through the bent plate 22 slides rightwards under the action of the pressure spring 23, so that the box body door can be opened for maintenance after the grounding switch is switched on. The product state at this time is: the disconnecting switch is opened and the grounding switch is closed, as shown in the attached figures 6-7.
In addition to the above, other embodiments of the present invention are possible. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a novel isolation, earthing switch for cable branch case, includes the casing, its characterized in that: an operation panel is arranged on one side of the shell, an isolation static knife, an isolation switch operation shaft, a grounding static knife and a grounding switch operation shaft which are parallel to each other are sequentially arranged in the shell positioned on the back of the operation panel from top to bottom, one end of the isolating switch operating shaft and one end of the grounding switch operating shaft which penetrate through the shell are provided with an isolating interlocking cam and a grounding interlocking cam, an interlocking plate I and an interlocking plate II are arranged between the disconnecting switch operating shaft and the grounding switch operating shaft, the first interlocking plate is fixed on the back of the operation panel by a fulcrum pin, the second interlocking plate is fixed on the back of the operation panel by a guide screw, the bottom of the operating panel is provided with an interlocking pin through a bent plate, the isolating switch operating shaft is linked with the isolating movable knife through a pull rod, the grounding switch operating shaft is connected with the grounding moving blade, and the operating panel is provided with a disconnecting switch operating hole and a grounding switch operating hole which correspond to the positions of the disconnecting switch operating shaft and the grounding switch operating shaft;
when the isolating switch is in a closing state, the isolating switch lock cam pushes the interlocking plate I to rotate, and the interlocking plate I blocks the grounding switch operation hole; when the isolating switch is in a switching-off state, the interlocking plate is reset through the reset tension spring, and the grounding switch operation hole is exposed;
when the grounding switch is in a closing state, the grounding interlocking cam pushes the interlocking plate II to move upwards, the interlocking plate II blocks the isolating switch operating hole, the interlocking pin is separated from the grounding interlocking cam, the interlocking pin is reset through the pressure spring, and the box body door is opened.
2. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: the interlocking plate II is positioned between the isolating interlocking cam and the grounding interlocking cam, the interlocking plate II is positioned on the front side of the interlocking plate I, and one end of the interlocking pin is close to the grounding interlocking cam.
3. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: an isolation quick-action pressure spring is arranged at one end, close to the shell, of the isolation switch operating shaft, one end of the isolation quick-action pressure spring is connected with the isolation switch operating shaft, and the other end of the isolation quick-action pressure spring is connected with the inner side of the shell; the other end of the grounding switch operating shaft penetrating through the shell is provided with a grounding quick-acting pressure spring, one end of the grounding quick-acting pressure spring is connected with the grounding switch operating shaft, and the other end of the grounding quick-acting pressure spring is connected with the outer side of the shell.
4. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: contact springs are arranged on the isolation moving knife and the grounding moving knife.
5. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: and a reset tension spring connected with the shell is arranged at the bottom of the first interlocking plate.
6. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: the interlocking pin is fixed in the operation panel through the bent plate, and one end of the interlocking pin is provided with a pressure spring connected with the shell.
7. The novel isolating and grounding switch for a cable branch box according to claim 1, wherein: and the interlocking plate rotates around the fulcrum pin until the switch operation hole is blocked for interlocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113763.7A CN107731615B (en) | 2017-11-13 | 2017-11-13 | Novel isolating and grounding switch for cable branch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113763.7A CN107731615B (en) | 2017-11-13 | 2017-11-13 | Novel isolating and grounding switch for cable branch box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107731615A CN107731615A (en) | 2018-02-23 |
| CN107731615B true CN107731615B (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711113763.7A Active CN107731615B (en) | 2017-11-13 | 2017-11-13 | Novel isolating and grounding switch for cable branch box |
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| Country | Link |
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| CN (1) | CN107731615B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202183319U (en) * | 2011-08-13 | 2012-04-04 | 宁波宝鑫铁路信号设备制造有限公司 | Mechanical interlocking device of disconnecting switch and earthing switch |
| CN203165780U (en) * | 2013-01-31 | 2013-08-28 | 浙江科润电力设备有限公司 | Rotary type indoor high voltage disconnecting switch |
| CN205069493U (en) * | 2015-09-17 | 2016-03-02 | 江苏大全高压开关有限公司 | Vacuum load switch and fuse combined electrical apparatus |
| CN205645582U (en) * | 2016-04-26 | 2016-10-12 | 亚洲电力设备(深圳)股份有限公司 | Big galvanic isolation switch |
| CN107293426A (en) * | 2017-07-26 | 2017-10-24 | 安徽驰纬电气有限公司 | A kind of ring main unit cabinet door interlock |
| CN207458830U (en) * | 2017-11-13 | 2018-06-05 | 江苏大全高压开关有限公司 | A kind of new isolation for cable branch box, earthing switch |
-
2017
- 2017-11-13 CN CN201711113763.7A patent/CN107731615B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202183319U (en) * | 2011-08-13 | 2012-04-04 | 宁波宝鑫铁路信号设备制造有限公司 | Mechanical interlocking device of disconnecting switch and earthing switch |
| CN203165780U (en) * | 2013-01-31 | 2013-08-28 | 浙江科润电力设备有限公司 | Rotary type indoor high voltage disconnecting switch |
| CN205069493U (en) * | 2015-09-17 | 2016-03-02 | 江苏大全高压开关有限公司 | Vacuum load switch and fuse combined electrical apparatus |
| CN205645582U (en) * | 2016-04-26 | 2016-10-12 | 亚洲电力设备(深圳)股份有限公司 | Big galvanic isolation switch |
| CN107293426A (en) * | 2017-07-26 | 2017-10-24 | 安徽驰纬电气有限公司 | A kind of ring main unit cabinet door interlock |
| CN207458830U (en) * | 2017-11-13 | 2018-06-05 | 江苏大全高压开关有限公司 | A kind of new isolation for cable branch box, earthing switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107731615A (en) | 2018-02-23 |
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