CN111091988A - Looped netowrk cabinet earthing switch maloperation blocking device that prevents - Google Patents
Looped netowrk cabinet earthing switch maloperation blocking device that prevents Download PDFInfo
- Publication number
- CN111091988A CN111091988A CN201911327250.5A CN201911327250A CN111091988A CN 111091988 A CN111091988 A CN 111091988A CN 201911327250 A CN201911327250 A CN 201911327250A CN 111091988 A CN111091988 A CN 111091988A
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- China
- Prior art keywords
- locking
- unlocking
- ring main
- main unit
- key
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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
-
- 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
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
- H01H9/285—Locking mechanisms incorporated in the switch assembly and operable by a key or a special tool
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Abstract
The invention discloses a locking device for preventing misoperation of a grounding knife of a ring main unit, which comprises a locking device and an unlocking device, wherein the locking device is provided with a locking limiting device and a magnetic latching electromagnet, the magnetic latching electromagnet is driven in a pulse mode, the unlocking device comprises a matter understanding locking part and an electronic unlocking part, the matter understanding locking part is used for unlocking the locking limiting device, a power supply used for driving in the pulse mode is arranged in the electronic unlocking part, the unlocking device is close to the magnetic latching electromagnet in the unlocking process, and the electronic unlocking part is positioned near the magnetic latching electromagnet through the matching of the matter understanding locking part and the locking limiting device; the locking device is also provided with an inductive capacitive sensor which is used for acquiring a three-phase high-voltage signal. The anti-error lock of the earthing switch of the ring main unit can ensure that the lock can be unlocked under the condition that the high-voltage end is free of electricity, so that the passive anti-error forced locking device is electrically locked and unlocked without electricity, namely, the function of electric test unlocking is realized, and the safety of operators is ensured.
Description
Technical Field
The invention relates to the technical field of high-voltage electrical equipment manufacturing, in particular to a misoperation preventing locking device for a grounding knife of a ring main unit.
Background
The earthing switch of the high-voltage ring main unit is an important device for ensuring the personal safety of equipment maintenance personnel. (1) When the electrical equipment is subjected to power failure maintenance, the grounding switch (or the grounding wire is hung) is required to be switched on for all directions in which power can be transmitted to the power failure equipment or induced voltage can be generated by the power failure equipment, so that the condition that power is suddenly transmitted accidentally by maintenance personnel when the power failure equipment (or a power failure working point) works is prevented, and the safety of the maintenance personnel is ensured. (2) Residual charges on the electrical equipment with the ring main unit disconnected can be discharged to the end by grounding through the grounding switch. The earthing switch of the high-voltage ring main unit is a mechanical earthing device which is used for ensuring the personal safety of equipment maintenance personnel and is used for earthing the high-voltage ring main unit. When electrical equipment has a power failure and overhauls, to probably transmitting power to each direction of power failure equipment or power failure equipment probably produce induced voltage all will close earthing switch (or hang the earth connection), this is in order to prevent that the maintainer from unexpected power transmission suddenly when power failure equipment (or power failure operating point) work, ensures the reliable safety measure of maintainer personal safety, and the surplus electric charge on the electrical equipment that the looped netowrk cabinet breaks off also can be closed by earthing switch and ground connection and the release is totally done. The grounding switch is not powered on when the power is switched on, the grounding switch is selected improperly, even some users do not install the grounding switch or remove the grounding switch without authorization (generally, the incoming line cabinet), the personal safety and the power utilization safety of maintainers can be seriously threatened, and serious liability accidents are caused. In this regard, the electric power industry standard DL408-91 "safety work for electric industry" is subject to strict regulations. However, in recent years, due to the structural difference between high-voltage ring main units manufactured by importing or introducing foreign advanced technologies and high-voltage ring main units which are developed and produced by our country according to the requirement of five prevention and old products in our country, when the high-voltage ring main units are overhauled, the operation procedures often conflict with the regulations, especially whether the grounding switch of the incoming line cabinet of the high-voltage ring main unit is arranged and how to adopt reliable, effective and simple error-proof measures are adopted, different understanding and requirements are provided for all power consumption departments and high-voltage ring main unit manufacturers, and conflicts and disputes are often generated in all links of system design, bidding and ordering, acceptance and power transmission, so that popularization and application of the novel intelligent anti-error lockset of the grounding switch of the ring main unit are of great significance to safe and reliable operation of an electric power system.
In recent years, due to the structural difference between high-voltage ring main units which are imported or manufactured by introducing foreign advanced technologies and high-voltage ring main units which are developed and manufactured by our country according to the requirement of five prevention and old products in our country, when the high-voltage ring main units are overhauled, the operation procedures often conflict with regulations, particularly whether the grounding switch of the incoming line cabinet of the high-voltage ring main unit is arranged and how to adopt reliable, effective and simple anti-error measures, all power consumption departments and high-voltage ring main unit manufacturing plants have different understanding and requirements, and often conflict and dispute are generated in all links of system design, bidding and ordering goods, acceptance and power transmission. In order to avoid such accidents, some power supply departments require that the grounding switch of the rear-stage high-voltage switch outgoing line cabinet is removed or permanently locked. However, once the earthing switch is removed or permanently locked, the mechanical interlock between the earthing switch and the cable compartment door is also released, otherwise the cable compartment door cannot be opened. However, when the mechanical interlock between the grounding switch and the cable chamber door is released, an operator can open the cable chamber door under the condition that the cable chamber is electrified, and the personal safety of the operator is seriously threatened.
Disclosure of Invention
The invention aims to overcome the defects that when related operators overhaul a ring main unit in the prior art, due to the defects in the design of an earthing switch, the operators can open the door of a cable chamber under the condition that the cable chamber is electrified, and the personal safety of the operators is seriously threatened, and provides an anti-misoperation lockset for the earthing switch of the ring main unit.
The purpose of the invention is realized by the following technical scheme:
a locking device for preventing misoperation of a grounding knife of a ring main unit comprises a locking device and an unlocking device, wherein the locking device is provided with a locking limiting device and a magnetic latching electromagnet, the magnetic latching electromagnet is driven in a pulse mode, the unlocking device comprises a matter understanding locking part and an electronic unlocking part, the matter understanding locking part is used for unlocking the locking limiting device, a power supply used for driving in the pulse mode is arranged in the electronic unlocking part, the unlocking device is close to the magnetic latching electromagnet in the unlocking process, and the electronic unlocking part is located near the magnetic latching electromagnet through the matching of the matter understanding locking part and the locking limiting device; the locking device is also provided with an inductive capacitive sensor which is used for acquiring a three-phase high-voltage signal. The locking device is in a passive mode, the locking state is kept through the magnetic latching type electromagnet under the state of not unlocking, the capacitive sensor obtains a three-phase high-voltage signal, the signal is sent to the locking device through the shielding cable to serve as a criterion for judging whether to unlock or not, the passive anti-misoperation forced locking device cannot unlock as long as one-phase high-voltage end is electrified, and the locking device can unlock as long as the high-voltage end is not electrified. The process of unblanking is that unlocking device is at first close to blocking device, and unlocking device's thing understanding lock part is close to locking stop device, and then the unblock part unlocks locking stop device, makes electron unblock part be close to magnetism hold formula electro-magnet, and magnetism hold formula electro-magnet takes place the action, and then makes blocking device unblock completely, has realized that passive mistake preventing forces blocking device to have electric shutting, electroless unblanking, tests the electric unblock function promptly.
As a preferred scheme, the locking limiting device comprises a lock cylinder, a key hole, a lock pin and a baffle plate, wherein the lock cylinder is used for controlling the extension and retraction of the lock pin, the lock pin and the baffle plate are used for controlling the position of the baffle plate, the unlocking device is a key, the front end of the key is an object understanding lock part matched with the key hole, and the middle part of a key head is an electronic unlocking part; the baffle is still connected with reset spring's one end, and reset spring's the other end is connected with fixing device. In a locked state, the position of the baffle is fixed by the lock pin, the electronic unlocking component cannot be close to the magnetic latching electromagnet, the key hole is unlocked after being matched with the key, and the baffle can move, so that the electronic unlocking cannot be close to the magnetic latching electromagnet. This design has avoided the maloperation to improve the security, also improves the unblock efficiency simultaneously.
As a preferred scheme, the locking limiting device comprises a lock cylinder, a key hole and a sliding groove, the lock cylinder is arranged in the sliding groove and is in sliding connection with the sliding groove, one end of the sliding groove is fixedly connected with a fixing device, the unlocking device is a key, the front end of the key is an object understanding lock part matched with the key hole, and the middle part of a key head is an electronic unlocking part. In a locked state, the lock cylinder is forbidden relative to the sliding groove, and the electronic unlocking component cannot be close to the magnetic latching electromagnet. After the key hole is matched with the key, the lock cylinder can slide relative to the sliding groove, and therefore electronic unlocking cannot be achieved when the lock cylinder is close to the magnetic latching type electromagnet. This design has avoided the maloperation to improve the security, also improves the unblock efficiency simultaneously.
Preferably, a plexiglass cover is provided outside the locking device. The organic glass cover increases the protection level.
As a preferred scheme, the locking device for preventing misoperation of the earthing switch of the ring main unit further comprises a remote control terminal, the unlocking device is provided with a signal receiving device, a single chip microcomputer and a control device, the remote control terminal is connected with the signal receiving device through wireless, the signal receiving device is connected with the single chip microcomputer, the single chip microcomputer is connected with the control device, and the control device is used for controlling the unlocking device to be close to the locking device and further used for controlling the on-off of a power supply. The remote control terminal can send a control signal to control the unlocking device to carry out the unlocking process, so that an operator does not need to be close to the ring main unit, and the safety is further improved.
As a preferred scheme, the unlocking device is further provided with a Hall proximity sensor, and the Hall proximity sensor is connected with the single chip microcomputer. The Hall proximity sensor is used for judging the magnetic holding type.
The invention has the advantages that the anti-error lock of the ring main unit grounding switch can ensure that the ring main unit grounding switch can be unlocked only under the condition that the high-voltage end is electroless, so that the passive anti-error forced locking device has the functions of electric locking and electroless unlocking, namely, the function of electricity testing unlocking, and the safety of operators is ensured. The invention has simple structure and strong practicability.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Wherein: 1. the device comprises a locking device, 2, an unlocking device, 3, a remote control terminal, 4, a three-phase high-voltage signal, 11, a magnetic latching electromagnet, 12, an inductive capacitive sensor, 21, a power supply, 22, a signal receiving device, 24, a single chip microcomputer, 25, a control device, 26 and a Hall proximity sensor.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1: a locking device for preventing misoperation of a grounding knife of a ring main unit comprises a locking device 1 and an unlocking device 2, wherein the locking device is provided with a locking limiting device and a magnetic latching electromagnet 11, the magnetic latching electromagnet is driven in a pulse mode, the unlocking device comprises a matter understanding locking part and an electronic unlocking part, the matter understanding locking part is used for unlocking the locking limiting device, a power supply 21 used for driving in the pulse mode is arranged in the electronic unlocking part, the unlocking device is close to the magnetic latching electromagnet in the unlocking process, and the electronic unlocking part is located near the magnetic latching electromagnet through the matching of the matter understanding locking part and the locking limiting device; the locking device is also provided with an inductive capacitive sensor 12, and the inductive capacitive sensor is used for acquiring the three-phase high-voltage signal 4.
The locking device is in a passive mode, the locking state is kept through the magnetic latching type electromagnet under the state of not unlocking, the capacitive sensor obtains a three-phase high-voltage signal, the signal is sent to the locking device through the shielding cable to serve as a criterion for judging whether to unlock or not, the passive anti-misoperation forced locking device cannot unlock as long as one-phase high-voltage end is electrified, and the locking device can unlock as long as the high-voltage end is not electrified. The process of unblanking is that unlocking device is at first close to blocking device, and unlocking device's thing understanding lock part is close to locking stop device, and then the unblock part unlocks locking stop device, makes electron unblock part be close to magnetism hold formula electro-magnet, and magnetism hold formula electro-magnet takes place the action, and then makes blocking device unblock completely, has realized that passive mistake preventing forces blocking device to have electric shutting, electroless unblanking, tests the electric unblock function promptly.
The locking limiting device comprises a lock cylinder, a key hole, a lock pin and a baffle plate, wherein the lock cylinder is used for controlling the extension of the lock pin, the lock pin and the baffle plate are used for controlling the position of the baffle plate, the unlocking device is a key, the front end of the key is an object understanding lock part matched with the lock hole, and the middle part of a key head is an electronic unlocking part; the baffle is still connected with reset spring's one end, and reset spring's the other end is connected with fixing device. An organic glass cover is arranged outside the locking device. In a locked state, the position of the baffle is fixed by the lock pin, the electronic unlocking component cannot be close to the magnetic latching electromagnet, the key hole is unlocked after being matched with the key, and the baffle can move, so that the electronic unlocking cannot be close to the magnetic latching electromagnet. This design has avoided the maloperation to improve the security, also improves the unblock efficiency simultaneously.
The anti-misoperation locking device of the ring main unit earthing switch further comprises a remote control terminal 3, a signal receiving device 22, a single chip microcomputer 24 and a control device 25 are arranged on the unlocking device, the remote control terminal is connected with the signal receiving device through wireless, the signal receiving device is connected with the single chip microcomputer, the single chip microcomputer is connected with the control device, and the control device is used for controlling the unlocking device to be close to the locking device and further used for controlling the on-off of a power supply. The unlocking device is also provided with a Hall proximity sensor 26 which is connected with the singlechip.
Example 2: the principle and the implementation method of the locking device are basically the same as those of embodiment 1, and the locking device is characterized in that the locking limiting device comprises a lock cylinder, a key hole and a sliding groove, the lock cylinder is arranged in the sliding groove and is in sliding connection with the sliding groove, one end of the sliding groove is fixedly connected with a fixing device, the unlocking device is a key, the front end of the key is a material understanding locking part matched with the lock hole, and the middle part of a key head is an electronic unlocking part. In a locked state, the lock cylinder is forbidden relative to the sliding groove, and the electronic unlocking component cannot be close to the magnetic latching electromagnet. After the key hole is matched with the key, the lock cylinder can slide relative to the sliding groove, and therefore electronic unlocking cannot be achieved when the lock cylinder is close to the magnetic latching type electromagnet. This design has avoided the maloperation to improve the security, also improves the unblock efficiency simultaneously.
Claims (6)
1. A locking device for preventing misoperation of a grounding knife of a ring main unit is characterized by comprising a locking device and an unlocking device, wherein the locking device is provided with a locking limiting device and a magnetic latching electromagnet, the magnetic latching electromagnet is driven in a pulse mode, the unlocking device comprises a matter understanding locking part and an electronic unlocking part, the matter understanding locking part is used for unlocking the locking limiting device, a power supply used for driving in the pulse mode is arranged in the electronic unlocking part, the unlocking device is close to the magnetic latching electromagnet in the unlocking process, and the electronic unlocking part is located near the magnetic latching electromagnet through the matching of the matter understanding locking part and the locking limiting device; the locking device is also provided with an inductive capacitive sensor which is used for acquiring a three-phase high-voltage signal.
2. The locking device for preventing misoperation of the earthing knife of the ring main unit according to claim 1, wherein the locking limiting device comprises a lock cylinder, a key hole, a lock pin and a baffle plate, the lock cylinder is used for controlling the extension and retraction of the lock pin, the lock pin and the baffle plate are used for controlling the position, the unlocking device is a key, the front end of the key is an object understanding locking part matched with the lock hole, and the middle part of a key head is an electronic unlocking part; the baffle is still connected with reset spring's one end, and reset spring's the other end is connected with fixing device.
3. The locking device for preventing misoperation of the earthing knife of the ring main unit according to claim 1, wherein the locking limiting device comprises a lock cylinder, a key hole and a sliding groove, the lock cylinder is arranged in the sliding groove and is in sliding connection with the sliding groove, one end of the sliding groove is fixedly connected with a fixing device, the unlocking device is a key, the front end of the key is an object understanding locking part matched with the lock hole, and the middle part of a key head is an electronic unlocking part.
4. The anti-misoperation locking device for the earthing knife of the ring main unit according to claim 1, 2 or 3, wherein a plexiglass cover is arranged outside the locking device.
5. The locking device for preventing misoperation of the earthing knife of the ring main unit according to claim 1, 2 or 3, characterized by further comprising a remote control terminal, wherein the unlocking device is provided with a signal receiving device, a single chip microcomputer and a control device, the remote control terminal is connected with the signal receiving device through wireless, the signal receiving device is connected with the single chip microcomputer, the single chip microcomputer is connected with the control device, and the control device is used for controlling the unlocking device to be close to the locking device and switching on and off the power supply.
6. The locking device for preventing misoperation of the earthing knife of the ring main unit according to claim 5, wherein the unlocking device is further provided with a Hall proximity sensor, and the Hall proximity sensor is connected with the single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327250.5A CN111091988A (en) | 2019-12-20 | 2019-12-20 | Looped netowrk cabinet earthing switch maloperation blocking device that prevents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327250.5A CN111091988A (en) | 2019-12-20 | 2019-12-20 | Looped netowrk cabinet earthing switch maloperation blocking device that prevents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111091988A true CN111091988A (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911327250.5A Pending CN111091988A (en) | 2019-12-20 | 2019-12-20 | Looped netowrk cabinet earthing switch maloperation blocking device that prevents |
Country Status (1)
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| CN (1) | CN111091988A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6131423A (en) * | 1997-10-30 | 2000-10-17 | Asea Brown Boveri Ag | Safety door-locking system for switchgear cabinets |
| CN202059053U (en) * | 2011-05-10 | 2011-11-30 | 于宝成 | Safety protective lockset of high-voltage electrical switch cabinet |
| CN104453380A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Handheld electronic unlocking key |
| CN208689639U (en) * | 2018-07-19 | 2019-04-02 | 珠海优特电力科技股份有限公司 | Tripper and lock system |
| CN110273587A (en) * | 2019-05-05 | 2019-09-24 | 国网浙江海盐县供电有限公司 | A kind of ring network cabinet earthing switch anti-error lock |
-
2019
- 2019-12-20 CN CN201911327250.5A patent/CN111091988A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6131423A (en) * | 1997-10-30 | 2000-10-17 | Asea Brown Boveri Ag | Safety door-locking system for switchgear cabinets |
| CN202059053U (en) * | 2011-05-10 | 2011-11-30 | 于宝成 | Safety protective lockset of high-voltage electrical switch cabinet |
| CN104453380A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Handheld electronic unlocking key |
| CN208689639U (en) * | 2018-07-19 | 2019-04-02 | 珠海优特电力科技股份有限公司 | Tripper and lock system |
| CN110273587A (en) * | 2019-05-05 | 2019-09-24 | 国网浙江海盐县供电有限公司 | A kind of ring network cabinet earthing switch anti-error lock |
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Application publication date: 20200501 |
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| RJ01 | Rejection of invention patent application after publication |