CN215770946U - Emergency brake separating mechanism locking spare power automatic switching device of medium-voltage cabinet - Google Patents
Emergency brake separating mechanism locking spare power automatic switching device of medium-voltage cabinet Download PDFInfo
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- CN215770946U CN215770946U CN202121247293.5U CN202121247293U CN215770946U CN 215770946 U CN215770946 U CN 215770946U CN 202121247293 U CN202121247293 U CN 202121247293U CN 215770946 U CN215770946 U CN 215770946U
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- spare power
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Abstract
The utility model provides a device is hauled oneself willingly into fully to urgent separating brake mechanism shutting of medium voltage cabinet, it includes spring button, and spring button sets up the outside at cubical switchboard front cabinet door, and spring button hugs closely the transmission shaft, and the transmission shaft setting is on the support of cubical switchboard front cabinet door inboard, and the other end of transmission shaft hugs closely the tripping separating brake button on the circuit breaker panel. The utility model aims to solve the technical problems that the working power supply voltage loss caused by tripping and opening button operation belongs to pure mechanical operation, the electrical locking of a spare power automatic switching device cannot be realized, the spare power automatic switching device is not locked after on-site emergency opening operation, a spare power supply can be automatically switched in to recover the bus voltage, the power supply reliability of an auxiliary power system is reduced, and more serious personal injuries and equipment damage accidents are caused.
Description
Technical Field
The utility model belongs to the technical field of power equipment, and particularly relates to a spare power automatic switching device for locking an emergency brake-separating mechanism of a medium-voltage cabinet.
Background
The medium-voltage complete combined switch cabinet applied to a plant power system of a power plant and an electric system of a substation is characterized in that a cabinet door of the switch cabinet can not be opened in a live state in order to meet the requirement of electric five-prevention, and when an electric operation loop fault or a bus needs emergency opening due to electric shock, a traditional switch cabinet breaker can not be operated by an emergency tripping opening button. At present, each equipment manufacturer adds an emergency brake-separating device on a cabinet door of a switch cabinet, and a spring button on the cabinet door can be used for manually operating an emergency brake-separating mechanism on site to link a breaker to emergently release a brake-separating button, so that the breaker is separated.
The power regulation specification requires that a factory power supply and a power supply used by a substation of a power plant are provided with an automatic switching-in device of a standby power supply, when the voltage of a working power supply disappears no matter what reason, the automatic switching-in device acts except a locking signal, and the voltage of the working power supply caused by tripping and opening button operation belongs to pure mechanical operation, so that the electric locking of the standby automatic switching-in device cannot be realized, after the emergency opening operation on site, the standby automatic switching-in device is not locked, the standby power supply can be automatically switched in to recover the bus voltage, the power supply reliability of the factory power system is reduced, and more serious personal injuries and equipment damage accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the working power supply voltage loss caused by tripping and opening button operation belongs to pure mechanical operation, the electrical locking of a spare power automatic switching device cannot be realized, the spare power automatic switching device is not locked after on-site emergency opening operation, a spare power supply can be automatically switched in to recover the bus voltage, the power supply reliability of an auxiliary power system is reduced, and more serious personal injuries and equipment damage accidents are caused.
A spare power automatic switching device for locking an emergency opening mechanism of a medium-voltage cabinet comprises a spring button, wherein the spring button is arranged on the outer side of a front cabinet door of the switch cabinet and is tightly attached to a transmission shaft, the transmission shaft is arranged on a bracket on the inner side of the front cabinet door of the switch cabinet, and the other end of the transmission shaft is tightly attached to a tripping opening button on a breaker panel;
the support is fixed on the inner side of a front cabinet door of the switch cabinet, the prismatic baffle I and the prismatic baffle II are embedded on the transmission shaft, springs are arranged between the prismatic baffle I and the prismatic baffle II and the support, the travel switch I and the travel switch II which are tightly attached to the two sides of the prismatic baffle I and the prismatic baffle II are fixed on the support, and contact signals of the travel switches are connected to the spare power automatic switching device I and the spare power automatic switching device II through the cable I and the cable II.
The spring button pushes the transmission shaft to drive the circuit breaker to release and open a brake button, mechanical opening of the circuit breaker is achieved, meanwhile, the prismatic baffle I and the prismatic baffle II are respectively transmitted to push rollers of the travel switch I and the travel switch II to roll, contacts of the travel switch I and the travel switch II are driven to act, and contact closing signals are sent to the spare power automatic switching device I and the spare power automatic switching device II.
The first spare power automatic switching device is sequentially connected with a power incoming line breaker DL1 and a power supply I; and the second automatic backup power switching device is sequentially connected with a power incoming line breaker DL2 and a power supply II.
A bus tie breaker DL3 is connected between the power incoming line breaker DL1 and the power incoming line breaker DL 2.
Compared with the prior art, the utility model has the following technical effects:
1) the emergency opening device is additionally provided with two wheel-sliding travel switch mechanisms, the process of the voltage loss of the working power supply caused by purely mechanical emergency opening operation is converted into an electrical signal through travel switch contacts and transmitted to the spare power automatic switching device, the spare power automatic switching device is electrically locked and quitted, and potential safety hazards of equipment and personnel caused by secondary voltage recovery of a bus when the spare power automatic switching device is switched into the spare power supply are prevented.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a circuit diagram of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, a spare power automatic switching device for locking an emergency opening mechanism of a medium-voltage cabinet comprises a spring button 2, wherein the spring button 2 is arranged on the outer side of a front cabinet door 1 of the switch cabinet, the spring button 2 is tightly attached to a transmission shaft 3, the transmission shaft 3 is arranged on a bracket 15 on the inner side of the front cabinet door 1 of the switch cabinet, and the other end of the transmission shaft 3 is tightly attached to a tripping opening button 4 on a breaker panel 5;
the support 15 is fixed on the inner side of a front cabinet door 1 of the switch cabinet, the prismatic baffle I7 and the prismatic baffle II 8 are inlaid on the transmission shaft 3, the spring 6 is arranged between the prismatic baffle I7, the prismatic baffle II 8 and the support 15, the travel switch I9 and the travel switch II 10 which are tightly attached to the prismatic baffle I7 and the prismatic baffle II 8 are fixed on the support 15, and contact signals of the travel switches are led to the spare power automatic switching device I13 and the spare power automatic switching device II 14 through the cable I11 and the cable II 12.
When emergency brake-separating operation is carried out, an external force triggers the spring button to push the transmission shaft to drive the circuit breaker to release the brake-separating button, mechanical brake-separating of the circuit breaker is realized, meanwhile, the prismatic baffle of the transmission shaft pushes the travel switch roller to roll, the travel switch contact is driven to act, a contact closing signal is sent to the spare power automatic switching device, and the spare power automatic switching device is electrically locked and withdrawn.
The spring button is fixed on the outer side of a front cabinet door of the switch cabinet and is tightly attached to the transmission shaft, so that operation and maintenance personnel can operate conveniently in emergency;
the transmission shaft is fixed on a support on the inner side of a front cabinet door of the switch cabinet, one end of the transmission shaft is tightly attached to the spring button, the other end of the transmission shaft is tightly attached to the tripping and opening button of the circuit breaker, the transmission shaft is provided with a prismatic baffle and a spring, the prismatic baffle and the transmission shaft are embedded into a whole, and a travel switch pulley is pushed to roll through a prismatic surface in the propelling process of the transmission shaft to drive a travel switch contact to act; the spring is fixed between the bracket and the prismatic baffle, and when the external acting force on the spring button is released, the spring deforms to reset the transmission shaft;
the travel switch is fixed on the bracket in a wheel-sliding manner, the pulley is tightly attached to the transmission shaft baffle, and a contact action signal of the travel switch is led out by a cable and is sent to the spare power automatic switching device for locking the spare power automatic switching device to enable the spare power automatic switching device to exit.
The spring button 2 pushes the transmission shaft 3 to drive the circuit breaker tripping and opening button 4, mechanical opening of the circuit breaker is achieved, meanwhile, the prismatic baffle I7 and the prismatic baffle II 8 are respectively transmitted to push rollers of the travel switch I9 and the travel switch II 10 to roll, contacts of the travel switch I9 and the travel switch II 10 are driven to act, and contact closing signals are sent to the spare power automatic switching device I13 and the spare power automatic switching device II 14.
The first automatic bus transfer device 13 is sequentially connected with a power supply incoming line breaker DL116 and a power supply I; and the second automatic backup power switching device 14 is sequentially connected with a power supply incoming line breaker DL217 and a power supply II.
A bus coupler circuit breaker DL318 is connected between the power incoming line breaker DL116 and the power incoming line breaker DL 217.
When the emergency automatic switching device is used, a contact signal of a travel switch I9 on an emergency opening device in a power incoming line breaker DL1 switch cabinet is connected to a locking switch I13 of a spare automatic switching device I I M; a contact signal of a travel switch I9 on an emergency opening device in a power incoming line breaker DL2 switch cabinet is connected to a lock switch I of a spare power automatic switching device II 14 on the II M; and a contact signal of a first travel switch 9 on an emergency opening device in the switch cabinet of the female circuit breaker DL3 is connected to the locking opening of a first spare power automatic switching device 13 on the IM, and a contact signal of a second travel switch 10 is connected to the locking opening of a second spare power automatic switching device 14 on the IIM.
When the service power or used power systems IM and IIM are independently powered by a power supply I and a power supply II respectively, and a power supply incoming line breaker DL1 executes emergency brake opening operation, a travel switch contact closing signal is sent to the IM spare power automatic switching device to be locked to enable the IM spare power automatic switching device to exit; when the power incoming line breaker DL2 executes emergency opening operation, a travel switch contact closing signal is sent to the II M spare power automatic switching device for locking and withdrawing.
When the auxiliary power or used power system IM is independently powered by a power supply I, the IIM is powered by the IM, the bus tie breaker DL3 is closed, and the power inlet line breaker DL1 executes emergency opening operation, a travel switch contact closing signal is sent to the I M spare power automatic switching device to be locked to enable the spare power automatic switching device to exit; when the bus tie breaker DL3 executes emergency opening operation, a travel switch contact closing signal is sent to the I M and the II M spare power automatic switching device for locking and withdrawing.
When the auxiliary power or used power system IIM is independently supplied with power by a power supply II, IM is supplied with power by the IIM, the bus tie breaker DL3 is closed, and the power incoming line breaker DL2 executes emergency brake opening operation, a travel switch contact closing signal is transmitted to the IIM spare power automatic switching device to be locked to enable the IIM spare power automatic switching device to exit; when the bus tie breaker DL3 executes emergency opening operation, a travel switch contact closing signal is sent to the IM and IIM spare power automatic switching devices to be locked and quit.
Claims (4)
1. A spare power automatic switching device for locking an emergency opening mechanism of a medium-voltage cabinet is characterized by comprising a spring button (2), wherein the spring button (2) is arranged on the outer side of a front cabinet door (1) of the switch cabinet, the spring button (2) is tightly attached to a transmission shaft (3), the transmission shaft (3) is arranged on a support (15) on the inner side of the front cabinet door (1) of the switch cabinet, and the other end of the transmission shaft (3) is tightly attached to a tripping opening button (4) on a breaker panel (5);
the support (15) is fixed on the inner side of a front cabinet door (1) of the switch cabinet, a prismatic baffle I (7) and a prismatic baffle II (8) are inlaid on the transmission shaft (3), a spring (6) is arranged between the prismatic baffle I (7), the prismatic baffle II (8) and the support (15), a travel switch I (9) and a travel switch II (10) which are tightly attached to the prismatic baffle I (7) and the prismatic baffle II (8) are fixed on the support (15), and a travel switch contact signal is externally led to a spare power automatic switching device I (13) and a spare power automatic switching device II (14) through a cable I (11) and a cable II (12).
2. The spare power automatic switching device for locking the emergency opening mechanism of the medium voltage cabinet according to claim 1, wherein the spring button (2) pushes the transmission shaft (3) to drive the circuit breaker to release the opening button (4) so as to realize mechanical opening of the circuit breaker, and simultaneously the prismatic baffle I (7) and the prismatic baffle II (8) are respectively transmitted to push the rollers of the travel switch I (9) and the travel switch II (10) to roll so as to drive the contacts of the travel switch I (9) and the travel switch II (10) to act, and the contact closing signal is sent to the spare power automatic switching device I (13) and the spare power automatic switching device II (14).
3. The medium voltage cabinet emergency opening mechanism locking spare power automatic switching device as claimed in claim 1 or 2, wherein the spare power automatic switching device I (13) is sequentially connected with a power incoming line breaker DL1(16) and a power supply I; and the second backup power automatic switching device (14) is sequentially connected with a power supply incoming line breaker DL2(17) and a power supply II.
4. The medium voltage cabinet emergency opening mechanism locking spare power automatic switching device according to claim 3, wherein a bus tie breaker DL3(18) is connected between a power inlet breaker DL1(16) and a power inlet breaker DL2 (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247293.5U CN215770946U (en) | 2021-06-04 | 2021-06-04 | Emergency brake separating mechanism locking spare power automatic switching device of medium-voltage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247293.5U CN215770946U (en) | 2021-06-04 | 2021-06-04 | Emergency brake separating mechanism locking spare power automatic switching device of medium-voltage cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215770946U true CN215770946U (en) | 2022-02-08 |
Family
ID=80099275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121247293.5U Active CN215770946U (en) | 2021-06-04 | 2021-06-04 | Emergency brake separating mechanism locking spare power automatic switching device of medium-voltage cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215770946U (en) |
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2021
- 2021-06-04 CN CN202121247293.5U patent/CN215770946U/en active Active
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