CN210918584U

CN210918584U - Electromagnetic locking system applied to high-voltage switch cabinet

Info

Publication number: CN210918584U
Application number: CN201921420533.XU
Authority: CN
Inventors: 宋胜辉; 孙学刚; 宋晶晶; 赵正旺
Original assignee: Huadian Beirui Electric Beijing Co ltd
Current assignee: Huadian Beirui Electric Beijing Co ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-07-03
Anticipated expiration: 2029-08-28

Abstract

The utility model discloses an use high tension switchgear's electromagnetic locking system, including electromagnetic lock, electrified display and high pressure sensor, the electromagnetic lock mainly includes power switch, internal control circuit and link gear, and outside power supply is connected to power switch's one end, and the internal control circuit of electromagnetic lock is connected to power switch's the other end, the internal control circuit of electromagnetic lock is connected with the link gear, the power source of electrified display is connected with outside power supply, and the input of electrified display signal is connected with high pressure sensor's signal output part, and the signal output part of electrified display is connected with power switch's signal input part. The electromagnetic lock device can be safely unlocked only by external power supply and correct signal output of the electrified display, so that the operation safety of the ring main unit is ensured.

Description

Electromagnetic locking system applied to high-voltage switch cabinet

Technical Field

The utility model relates to a high tension switchgear field, concretely relates to be applied to high tension switchgear's electromagnetic locking system.

Background

At present, the high-voltage switch cabinet in the electric power market is provided with a mechanical interlocking device, the switch cabinet has a part to adopt a lower incoming line mode to use in practical application, and the mechanical interlocking of the high-voltage switch cabinet per se in the mode loses the original design initiatives. In order to make up for the problem, the high-voltage switch cabinet is used in the wire inlet unit in association with the electromagnetic lock, so that the accident of mistakenly closing the grounding switch in an electrified way is prevented.

The active electromagnetic lock can realize the lock opening and closing operation by depending on a DC or AC power supply provided by PT in the ring main unit, and the electromagnetic lock has the characteristics of simple structure and stable and reliable work, so the active electromagnetic lock is always used in the electric power market; however, the opening and closing lock of the electromagnetic lock of the type has only one judgment basis, once the power supply line associated with the electrified display is connected or opened, the electrified display cannot normally output an unlocking signal, the electromagnetic lock loses the judgment reference condition, and the electromagnetic lock cannot be safely unlocked, so that the safety protection effect cannot be achieved.

Problem and not enough to current electromagnetic lock exist, the utility model provides a be applied to high tension switchgear's novel electromagnetic locking system, this system must have external power supply and add electrified display correctly output signal, just can safely unblank to guarantee looped netowrk cabinet operation safety.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The to-be-solved technical problem of the utility model is: the existing electromagnetic lock depends on a power supply provided in the ring main unit, only one judgment basis is provided during unlocking and locking, once a power supply line associated with the electrified display is connected or opened, the electrified display cannot normally output an unlocking signal, the electromagnetic lock loses a judgment reference condition, and the electromagnetic lock cannot be safely unlocked, so that the safety protection effect cannot be achieved.

(II) technical scheme

For solving the technical problem, the utility model provides a be applied to high tension switchgear's electromagnetic locking system, including electromagnetic lock, electrified display and high pressure sensor, the electromagnetic lock mainly includes power switch, internal control circuit and link gear, and outside power supply is connected to power switch's one end, and the internal control circuit of electromagnetic lock is connected to power switch's the other end, and internal control circuit is connected with the link gear, the power source of electrified display is connected with outside power supply, and the input of electrified display signal is connected with high pressure sensor's signal output part, and the signal output part of electrified display is connected with power switch's signal input part.

The internal control circuit of the electromagnetic lock comprises a voltage limiting protection circuit, an isolation circuit, an energy storage circuit and a driving circuit which are connected in sequence.

The power supply device also comprises a rectification current-limiting circuit, and the external power supply is connected with the power supply switch of the electromagnetic lock and the power interface of the electrified display through the rectification current-limiting circuit.

The external power supply is a direct current or alternating current power supply, and the voltage is 24V, 48V or 220V.

The electromagnetic lock, the electrified display and the high-voltage sensor are all located in the shell, an emergency unlocking hole is formed in the shell, and the position of the emergency unlocking hole corresponds to the position of a linkage mechanism of the electromagnetic lock.

On the basis of the utility model, the utility model provides an use the high tension switchgear of electromagnetic locking system, electromagnetic locking system adopts screw fixed mounting in high tension switchgear panel earthing switch handle hole position.

(III) advantageous effects

The above technical scheme of the utility model has following advantage: (1) because the electromagnetic locking system adopts an external power supply, and the electromagnetic lock and the electrified display are respectively connected with the external power supply (the electromagnetic lock is connected with the electrified display in parallel), when the unlocking of the electromagnetic lock is verified, firstly, the normal power supply of the external power supply can ensure that the unlocking action of the electromagnetic lock can be completed, secondly, the electrified display can normally output the locking and unlocking signal as the criterion for unlocking the electromagnetic lock, and the unlocking cannot be performed if any one condition is not met, thereby ensuring the operation safety of the high-voltage switch cabinet; (2) because the isolating circuit is arranged in the internal control circuit of the electromagnetic lock before the energy storage circuit, the circuit isolation design of the power supply and the operation control part is realized, and the operation safety of the device is ensured; (3) because the emergency unlocking hole for emergency unlocking is arranged at the position, corresponding to the linkage mechanism of the electromagnetic lock, on the front surface of the shell of the electromagnetic locking system, the electromagnetic locking system can be unlocked by using an auxiliary tool under special conditions, and the reuse of the electromagnetic locking system is not influenced; (4) due to the fact that the high-voltage switch cabinet of the electromagnetic locking system is used, the electromagnetic locking system is installed and fixed at the position of the operation hole of the grounding knife of the panel of the high-voltage switch cabinet through the screw, installation is convenient, and the electromagnetic locking system is particularly convenient for old projects to be transformed and upgraded.

Drawings

FIG. 1 is a block diagram of the present invention

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, an electromagnetic locking system applied to a high-voltage switch cabinet comprises an electromagnetic lock, a live display and a high-voltage sensor. The electromagnetic lock mainly comprises a power supply switch, an internal control circuit and a linkage mechanism. One end of the power supply switch is connected with an external power supply, the other end of the power supply switch is connected with an internal control circuit of the electromagnetic lock, and the internal control circuit is connected with the linkage mechanism. The internal control circuit mainly comprises a voltage limiting protection circuit, an isolation circuit, an energy storage circuit and a driving circuit which are sequentially connected, and a DC/DC isolation circuit is added between the voltage limiting protection circuit and the energy storage circuit, so that the circuit isolation of a power supply and an operation control part can be realized, and the operation safety is further ensured. The power interface of the electrified display is connected with an external power supply, the signal input end of the electrified display is connected with the signal output end of the high-voltage sensor, and the signal output end of the electrified display is connected with the signal input end of the power supply switch. The system adopts an external power supply scheme, the used power supply can be a direct current or alternating current power supply, the voltage can be 24V or 48V or 220V, and the external power supply supplies power to the whole circuit after passing through the rectifying current-limiting circuit. In the system, the electromagnetic lock and the electrified display are connected in parallel to form electrical interlocking, the external power supply supplies power for the electromagnetic lock and the electrified display at the same time, and the electromagnetic lock can be ensured to finish unlocking action only if the external power supply is normal. However, to safely unlock the lock, the output signal of the charged display needs to be detected. The charged display defines the output mode as a high-voltage charged mode and a high-voltage non-charged mode according to the charged condition detected by the high-voltage sensor. In the high-voltage electrified mode, the locking output end of the electrified display has no voltage, and the electromagnetic lock connected with the rear end cannot be unlocked; in the high-voltage no-power mode, the electrified display locks the output end to output voltage, and the electromagnetic lock connected with the rear end can be opened. Therefore, only if the external power supply is normal and the output end of the electrified display normally outputs the unlocking signal, the electromagnetic lock can be driven to unlock, and the electromagnetic lock cannot be unlocked under any condition.

When the electromagnetic lock is actually used, the charged display detects an output signal from the high-voltage sensor, if high-voltage charge is detected, the signal output end of the charged display has no voltage, and a power supply switch of the electromagnetic lock cannot be closed, so that a control circuit in the electromagnetic lock is not powered, and even if a starting control button is pressed, the electromagnetic lock cannot complete unlocking action due to no power supply; if the electrified display detects that the high voltage is not electrified, the signal output end of the electrified display outputs voltage, the power supply switch of the electromagnetic lock is closed, the internal control circuit of the electromagnetic lock starts to work, if the starting control button is pressed at the moment, the energy storage circuit is connected to release unlocking voltage, the electromagnet associated with the circuit performs suction action, the device closed hole cover is opened, the reset rod bounces, and the unlocking operation is completed.

The electromagnetic locking system is arranged at the position of an operation hole of the grounding knife of the panel of the high-voltage switch cabinet, so that the grounding knife is prevented from being mistakenly closed in an electrified way. The electromagnetic locking system adopts novel appearance design, is convenient to install, and only needs to be fixed by 3 screws on the panel of the high-voltage switch cabinet. The installation in the factory is convenient, and old projects can be more conveniently modified and upgraded. This electromagnetic locking system has still set up urgent unlocking hole in the positive position that corresponds with the link gear of electromagnetic lock of casing of electromagnetic locking system, has emergent unblock function, and usable appurtenance opens under the special circumstances, does not influence the system and uses once more.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an electromagnetic locking system for high tension switchgear which characterized in that: including electromagnetic lock, electrified display and high pressure sensor, the electromagnetic lock mainly includes power switch, internal control circuit and link gear, and outside power supply is connected to the one end of power switch, and electromagnetic lock internal control circuit is connected to the other end of power switch, and internal control circuit is connected with link gear, the power source of electrified display is connected with outside power supply, and the input of electrified display signal is connected with high pressure sensor's signal output part, and the signal output part of electrified display is connected with power switch's signal input part.

2. The electromagnetic locking system for high-voltage switchgear cabinets of claim 1, wherein: the internal control circuit of the electromagnetic lock comprises a voltage limiting protection circuit, an isolation circuit, an energy storage circuit and a driving circuit which are connected in sequence.

3. The electromagnetic locking system for high-voltage switchgear cabinets of claim 1, wherein: the power supply switch of the electromagnetic lock is connected with the power supply interface of the electrified display through the rectification current-limiting circuit.

4. The electromagnetic locking system for high-voltage switchgear cabinets of claim 1, wherein: the device also comprises a starting control button, and the starting control button is connected with the driving circuit.

5. The electromagnetic locking system for high-voltage switchgear cabinets of claim 1, wherein: the external power supply is a direct current or alternating current power supply, and the voltage is 24V, 48V or 220V.

6. The electromagnetic locking system for high-voltage switchgear cabinets of claim 1, wherein: the electromagnetic lock is characterized by further comprising a shell, the electromagnetic lock, the electrified display and the high-voltage sensor are all located in the shell, an emergency unlocking hole is formed in the shell, and the position of the emergency unlocking hole corresponds to the position of a linkage mechanism of the electromagnetic lock.

7. A high voltage switchgear using an electromagnetic locking system according to any of claims 1-6, characterized in that: the electromagnetic locking system is fixedly installed at the position of the grounding knife operating hole of the panel of the high-voltage switch cabinet by adopting screws.