CN111613479B - Novel five-prevention locking method - Google Patents
Novel five-prevention locking method Download PDFInfo
- Publication number
- CN111613479B CN111613479B CN202010306154.9A CN202010306154A CN111613479B CN 111613479 B CN111613479 B CN 111613479B CN 202010306154 A CN202010306154 A CN 202010306154A CN 111613479 B CN111613479 B CN 111613479B
- Authority
- CN
- China
- Prior art keywords
- locking
- circuit breaker
- rotating shaft
- closing
- isolation
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- 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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Classifications
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- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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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
- H01H31/06—Interlocking mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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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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- 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
- H01H33/46—Interlocking mechanisms
- H01H33/48—Interlocking mechanisms for interlocking between casing or cover and mechanism for operating contacts
-
- 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
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
Abstract
The invention relates to a novel five-prevention locking method, which locks a closing pawl of a vacuum circuit breaker to prevent the vacuum circuit breaker from closing when the vacuum circuit breaker is disconnected. According to the invention, the on-off position of the main shaft of the circuit breaker is acquired, and the operation sequence of interconnection and interlocking is carried out by taking the closing of the closed circuit breaker as a center, namely, the circuit breaker closing position interlocking mechanism locks the isolation switch, the operation shaft of the grounding switch and the operation wicket of the synchronous locking five-prevention interlocking mechanism in a mechanical mode, so that misoperation is effectively prevented, the unlocking mechanism operates the wicket when the circuit breaker is in an open position, and the circuit breaker closing sincere is synchronously locked, the rotation shaft of the isolation switch is locked, so that the circuit breaker is prevented from being closed when the grounding switch is operated.
Description
Technical Field
The invention relates to a five-prevention locking method for a switch cabinet.
Background
The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet mainly comprise a vacuum circuit breaker, an isolating switch and a grounding switch, and in order to realize five-prevention of the switch cabinet, a five-prevention interlocking mechanism needs to be arranged among the components.
The existing five-prevention interlocking method of the five-prevention interlocking switch cabinet generally adopts a linkage mode to ensure that the vacuum circuit breaker can be simultaneously disconnected with the disconnecting switch and the grounding switch, when the disconnecting switch is disconnected with a load, the five-prevention interlocking mechanism can simultaneously disconnect the vacuum circuit breaker, the occurrence of misoperation cannot be avoided, only the result of misoperation can be reduced, and certain potential safety hazard exists; in order to ensure that the five-prevention interlocking mechanism can break the vacuum circuit breaker in time, the five-prevention interlocking mechanism is usually in linkage connection with the opening and closing lock of the vacuum circuit breaker, the five-prevention interlocking mechanism can be operated only after the opening of the circuit breaker, but the opening and closing position signals of the circuit breaker are uploaded only in a mode of an electric appliance opening and closing point under the connection mode, a circuit breaker closing electric appliance control loop is disconnected, the circuit breaker can still be closed when other equipment in a cabinet is operated, the circuit breaker can be immediately disconnected after being closed, and certain potential safety hazards exist in the operation process.
Disclosure of Invention
Aiming at the defects, the invention provides a novel five-prevention locking method, which has high safety by acquiring the opening and closing positions of the main shaft of the circuit breaker and carrying out the operation sequence of interconnection and interlocking by taking the closing of the locking circuit breaker as the center.
In order to achieve the purpose, the invention adopts a novel five-prevention locking method, when the vacuum circuit breaker is disconnected, a closing pawl of the vacuum circuit breaker is locked, and the vacuum circuit breaker is prevented from being closed.
The invention specifically comprises the following steps:
(1) collecting the opening and closing position of a main shaft of the vacuum circuit breaker, pushing an isolation lock rod into a locking groove of an isolation locking plate by a brake separating pawl to lock an isolation rotating shaft when the vacuum circuit breaker is at the closing position, so that an isolation switch connected with the isolation rotating shaft is locked, pushing a locking push rod into a locking groove of a grounding locking plate by a cam plate on the isolation rotating shaft to lock the grounding rotating shaft at the moment, so that the grounding switch connected with the grounding rotating shaft is locked, and locking a closing rotating shaft by a locking rotating shaft to lock a door lock by a door locking plate to prevent the door from being opened;
(2) when the vacuum circuit breaker is in the opening position, the isolation lock rod releases the locking of the isolation rotating shaft under the action of the reset spring, so that the isolation switch can be operated, and meanwhile, the locking of the door lock is released;
(3) the disconnecting switch is operated to be opened, the cam plate on the isolating rotating shaft rotates to release the pushing of the locking push rod, the locking push rod releases the locking of the grounding rotating shaft under the action of the reset spring, and the locking synchronization between the disconnecting switch and the grounding switch is released;
(4) and a driving wheel plate on the grounding rotating shaft pushes a piston to lock a closing pawl of the vacuum circuit breaker to prevent the vacuum circuit breaker from closing with a ground knife, and a reset locking push rod locks an isolating switch rotating shaft through a cam plate to prevent the disconnecting link from closing with the ground knife.
According to the invention, the on-off position of the main shaft of the circuit breaker is acquired, and the operation sequence of interconnection and interlocking is carried out by taking the closing of the closed circuit breaker as a center, namely, the circuit breaker closing position interlocking mechanism locks the isolation switch, the operation shaft of the grounding switch and the operation wicket of the synchronous locking five-prevention interlocking mechanism in a mechanical mode, so that misoperation is effectively prevented, the unlocking mechanism operates the wicket when the circuit breaker is in an open position, and the circuit breaker closing sincere is synchronously locked, the rotation shaft of the isolation switch is locked, so that the circuit breaker is prevented from being closed when the grounding switch is operated.
The five-prevention interlocking mechanism has the beneficial effects that the isolating switch, the grounding switch and the cabinet door are locked when the vacuum circuit breaker is switched on, so that misoperation during the switching-on of the vacuum circuit breaker is avoided; the five-prevention interlocking mechanism is locked with the closing pawl of the vacuum circuit breaker, so that the potential safety hazard of mistaken closing during opening of the vacuum circuit breaker is eliminated, and the safety is high; meanwhile, the five-prevention interlocking switch cabinet is simple in structure and convenient to install.
Drawings
FIG. 1 is a schematic diagram of the basis of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a five-prevention interlocking mechanism based on the embodiment of the invention.
FIG. 3 is a schematic view of the isolation locking bar mating according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the locking push rod according to the embodiment of the present invention.
FIG. 5 is an enlarged view of a portion of the basis of an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-5, the device adopting the invention is a five-prevention interlocking switch cabinet, which comprises a cabinet body 50, and a vacuum circuit breaker 20, an isolating switch 30, a grounding switch 40 and a five-prevention interlocking mechanism 10 which are arranged in the cabinet body 50, wherein the five-prevention interlocking mechanism 10 is arranged below the vacuum circuit breaker 20, the five-prevention interlocking mechanism 10 comprises a chassis 1, a closing rotating shaft 2, a closing rotating shaft 3, an isolating lock rod 4 and a locking push rod 5, the closing rotating shaft 2, the isolating lock rod 4 and the locking push rod 5 are arranged in the chassis 1 in parallel, the closing rotating shaft 3, the closing rotating shaft 2, the isolating lock rod 4 and the locking push rod 5 are arranged in the chassis 1 in a mutually perpendicular manner, a connecting plate 31 is arranged on the closing rotating shaft 3, the connecting plate 31 is linked with a main shaft 201 of the vacuum circuit breaker 20, a brake separating brake 32 is arranged at the intersecting position of the closing rotating shaft 3 and the isolating lock rod 4, a brake bearing 41 is arranged on the isolating lock rod 4 corresponding to the brake separating brake 32, the two ends of the isolation lock rod 4 are respectively provided with a driving wheel plate 42 and an isolation locking plate 43, the two ends of the locking push rod 5 are respectively provided with a grounding locking plate 51 and a cam plate 52, the two sides of the locking rotating shaft 3 are respectively provided with an isolation rotating shaft 6 and a grounding rotating shaft 7 in parallel, the isolation locking plate 43 and the cam plate 52 are sleeved on the isolation rotating shaft 6 to coaxially rotate, the driving wheel plate 42 and the grounding locking plate 51 are sleeved on the grounding rotating shaft 7 to coaxially rotate, the isolation rotating shaft 6 is connected with an isolation connecting rod 61, the isolation rotating shaft 6 is connected with the isolation switch 30 through the isolation connecting rod 61, the grounding rotating shaft 7 is connected with a grounding connecting rod 71, the grounding rotating shaft 7 is connected with the grounding switch 30 through the grounding connecting rod 71, the chassis 1 forms a connecting rod groove 11 at the passing part of the isolation connecting rod 61 and the grounding connecting rod 71, the periphery of the isolation locking plate 43 and the grounding locking plate 51 is respectively provided with four locking grooves 44 matched with the isolation lock rod 4 and the locking push rod 5, the four locking grooves are arranged at equal angles of 90 degrees, a piston 8 is arranged on the driving wheel plate 42, the piston 8 is sleeved in the piston sleeve 81 and moves up and down, the upper end of the piston 8 is in linkage connection with a closing pawl of the vacuum circuit breaker, a reset spring 9 for pulling the isolation lock rod 4 to the driving wheel plate 42 is sleeved on the isolation lock rod 4, a reset spring for pulling the locking push rod 5 to the cam plate 52 is sleeved on the locking push rod 5, the closing rotating shaft 2 is arranged outside one end of the locking rotating shaft 3, the closing rotating shaft 2 and the locking rotating shaft 3 are in meshing linkage through a bevel gear, a door locking plate 21 is arranged on the closing rotating shaft 2, the door locking plate 21 is matched with a door lock to realize locking, and the isolation lock rod 4 and the locking push rod 5 are provided with a abdicating groove 45 for the locking rotating shaft 3 to pass through.
The specific implementation method of the invention is as follows with reference to the attached drawings:
(1) collecting the opening and closing position of a main shaft 201 of a vacuum circuit breaker 20, when the vacuum circuit breaker 20 is in the opening and closing position, an opening pawl 32 pushes an isolation lock rod 4 into a locking groove of an isolation locking plate 43 to lock an isolation rotating shaft 6, so that an isolation switch 30 connected with the isolation rotating shaft 6 is locked, at the moment, a cam plate 52 on the isolation rotating shaft 6 pushes a locking push rod 5 into a locking groove of a grounding locking plate 51 to lock a grounding rotating shaft 7, so that a grounding switch 40 connected with the grounding rotating shaft 7 is locked, and meanwhile, a door closing rotating shaft 2 is locked through a locking rotating shaft 3 to enable a door lock plate 21 to lock a door lock and prevent the door from being opened;
(2) when the vacuum circuit breaker 20 is in the opening position, the isolation lock rod 4 releases the locking of the isolation rotating shaft 6 under the action of the return spring, so that the isolation switch 30 can operate, and the locking of the door lock is released;
(3) the isolating switch 30 is operated to open the brake, the cam plate 52 on the isolating rotating shaft 6 rotates to release the pushing of the locking push rod 5, the locking push rod 5 releases the locking of the grounding rotating shaft 7 under the action of the return spring, and the locking synchronization between the isolating switch 30 and the grounding switch 40 is released;
(4) when the grounding switch 40 is operated to be switched on, the driving wheel plate 42 on the grounding rotating shaft 7 pushes the piston 8 to lock a switching-on pawl of the vacuum circuit breaker 20 to prevent the vacuum circuit breaker 20 from being switched on with a ground switch, and the reset locking push rod 5 locks the isolation rotating shaft 6 through the cam plate 52 to prevent the isolation switch 30 from being switched on with a ground switch.
Claims (1)
1. A five-prevention locking method is characterized in that: when the vacuum circuit breaker is disconnected, the closing pawl of the vacuum circuit breaker is locked to prevent the vacuum circuit breaker from closing, and the method comprises the following steps:
(1) collecting the opening and closing position of a main shaft of the vacuum circuit breaker, pushing an isolation lock rod into a locking groove of an isolation locking plate by a brake separating pawl to lock an isolation rotating shaft when the vacuum circuit breaker is at the closing position, so that an isolation switch connected with the isolation rotating shaft is locked, pushing a locking push rod into a locking groove of a grounding locking plate by a cam plate on the isolation rotating shaft to lock the grounding rotating shaft at the moment, so that the grounding switch connected with the grounding rotating shaft is locked, and locking a closing rotating shaft by a locking rotating shaft to lock a door lock by a door locking plate to prevent the door from being opened;
(2) when the vacuum circuit breaker is in the opening position, the isolation lock rod releases the locking of the isolation rotating shaft under the action of the reset spring, so that the isolation switch can be operated, and meanwhile, the locking of the door lock is released;
(3) the disconnecting switch is operated to be opened, the cam plate on the isolating rotating shaft rotates to release the pushing of the locking push rod, the locking push rod releases the locking of the grounding rotating shaft under the action of the reset spring, and the locking synchronization between the disconnecting switch and the grounding switch is released;
(4) and a driving wheel plate on the grounding rotating shaft pushes a piston to lock a closing pawl of the vacuum circuit breaker to prevent closing with a ground knife, and a reset locking push rod locks an isolating switch rotating shaft through a cam plate to prevent closing with the ground knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306154.9A CN111613479B (en) | 2020-04-17 | 2020-04-17 | Novel five-prevention locking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306154.9A CN111613479B (en) | 2020-04-17 | 2020-04-17 | Novel five-prevention locking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111613479A CN111613479A (en) | 2020-09-01 |
| CN111613479B true CN111613479B (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010306154.9A Active CN111613479B (en) | 2020-04-17 | 2020-04-17 | Novel five-prevention locking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111613479B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508764A (en) * | 2020-04-17 | 2020-08-07 | 亨斯迈(杭州)电力技术有限公司 | Five-prevention interlocking mechanism for switch cabinet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201698930U (en) * | 2010-05-17 | 2011-01-05 | 厦门明翰电气有限公司 | Locking device of lifting door switching device operation mechanism |
| KR20150089730A (en) * | 2014-01-28 | 2015-08-05 | 엘에스산전 주식회사 | Interlock Device of Withdrawer of Vacuum Circuit Breaker |
| CN204651234U (en) * | 2015-06-16 | 2015-09-16 | 董佃平 | A kind of fixed five-prevention operation mechanism of QH2 type mesohigh |
| CN105047452A (en) * | 2015-05-13 | 2015-11-11 | 浙江临高电气实业有限公司 | Switch cabinet grounding interlocking apparatus |
| CN105703232A (en) * | 2016-04-26 | 2016-06-22 | 乐清致轩电气有限公司 | Circuit breaker interlocking mechanism |
| KR20170077645A (en) * | 2015-12-28 | 2017-07-06 | 엘에스산전 주식회사 | Apparatus for Operation of On/Off Button of Circuit Breaker |
| CN109285719A (en) * | 2018-10-19 | 2019-01-29 | 四川行之知识产权运营服务有限公司 | A kind of hanging-connecting cable chamber door and earthing switch interlocking mechanism |
| DE102018115323A1 (en) * | 2017-08-24 | 2019-02-28 | General Electric Company | Electric power distribution system with a pressure relief mechanism |
-
2020
- 2020-04-17 CN CN202010306154.9A patent/CN111613479B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201698930U (en) * | 2010-05-17 | 2011-01-05 | 厦门明翰电气有限公司 | Locking device of lifting door switching device operation mechanism |
| KR20150089730A (en) * | 2014-01-28 | 2015-08-05 | 엘에스산전 주식회사 | Interlock Device of Withdrawer of Vacuum Circuit Breaker |
| CN105047452A (en) * | 2015-05-13 | 2015-11-11 | 浙江临高电气实业有限公司 | Switch cabinet grounding interlocking apparatus |
| CN204651234U (en) * | 2015-06-16 | 2015-09-16 | 董佃平 | A kind of fixed five-prevention operation mechanism of QH2 type mesohigh |
| KR20170077645A (en) * | 2015-12-28 | 2017-07-06 | 엘에스산전 주식회사 | Apparatus for Operation of On/Off Button of Circuit Breaker |
| CN105703232A (en) * | 2016-04-26 | 2016-06-22 | 乐清致轩电气有限公司 | Circuit breaker interlocking mechanism |
| DE102018115323A1 (en) * | 2017-08-24 | 2019-02-28 | General Electric Company | Electric power distribution system with a pressure relief mechanism |
| CN109285719A (en) * | 2018-10-19 | 2019-01-29 | 四川行之知识产权运营服务有限公司 | A kind of hanging-connecting cable chamber door and earthing switch interlocking mechanism |
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| Publication number | Publication date |
|---|---|
| CN111613479A (en) | 2020-09-01 |
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