CN107905641A - A kind of switchgear anti-misoperation locking device - Google Patents

Abstract

The invention discloses a kind of switchgear anti-misoperation locking device, anti-misoperation locking device is arranged on switchgear, grounding switch is equipped with switchgear, anti-misoperation locking device includes communication management module and actuating mechanism, grounding switch is equipped with auxiliary contact, the auxiliary contact of grounding switch in communication management module connecting switch cabinet, actuating mechanism includes electromagnet, gag lever post, magnetic baffle ring and latch hook, magnetic baffle ring is arranged on the middle part of gag lever post, when electromagnet is powered, magnetic baffle ring on gag lever post causes gag lever post to depart from latch hook by electromagnetic actuation, and cabinet door unlocks at this time；When electromagnet is not charged, gag lever post is fallen into latch hook, at this time cabinet door locking.The present invention provides a kind of safe, certain switchgear anti-misoperation locking device that in the case of no electricity, cabinet door could be opened only in cabinet.

Description

A switch cabinet anti-misoperation locking device

technical field

The invention relates to the technical field of switch cabinet protection devices, in particular to a switch cabinet anti-misoperation locking device.

Background technique

The anti-misoperation locking device is an important equipment for substations to prevent the "five types" of misoperations. A reliable anti-misoperation locking device is an important guarantee for the safe and stable operation of people, power grids and equipment. "Eighteen Major Power Grid Anti-Accident Measures of the State Grid Corporation" pointed out that high-voltage switchgear should choose products with complete "five defenses" functions. The "State Grid Corporation Electricity Safety Work Regulations" also clearly stipulates that high-voltage electrical equipment should be equipped with a complete anti-misoperation locking device, and have a complete anti-misoperation locking device function, and mechanical locks should be installed if they do not have the anti-misoperation locking function.

At present, in the existing technology, the door of the cable room of the switch cabinet is fastened by screws. Regardless of whether the cable is charged or not, the door can be opened with a special crank or even a screwdriver. It is easy to cause electric shock accidents.

The "switch cabinet" disclosed in the Chinese patent literature, its announcement number is CN104701750A, and the announcement date is June 10, 2015. The application discloses a switch cabinet, which includes: a cabinet body; a cabinet door, a set On the cabinet body; and a locking device, the locking device includes a first positioning part, a second positioning part and a locking part, the first positioning part is fixedly arranged on the cabinet body, and the second positioning part is fixed corresponding to the first positioning part Set on the cabinet door, the locking part is slidably connected between the cabinet door and the cabinet body, and has a first working position connecting the first positioning part and the second positioning part and detached from the first positioning part and the second positioning part The second working position of the connected position. The operator can easily close or open the door of the switch cabinet by simply operating the locking device, avoiding complicated and cumbersome processes, saving the time for opening and closing the door, and saving the labor cost of the operator . The weak point of this invention is that the cabinet door could not be opened without guaranteeing that the inside of the cabinet is really under the situation of no electricity.

Contents of the invention

In order to overcome the disadvantages in the prior art that the switchgear can be opened by a crank handle or even a screwdriver and does not have the function of preventing misoperation and locking, the present invention provides a high-safety switchgear that only has no electricity inside the switchgear. The switch cabinet anti-misoperation locking device that the cabinet door can only be opened when the cabinet door is down.

In order to achieve the above object, the present invention adopts the following technical solutions:

An anti-misoperation locking device for a switch cabinet. The anti-misoperation locking device is arranged on the switch cabinet, and a grounding knife switch is provided in the switch cabinet. The anti-misoperation locking device includes a communication management module and an action mechanism. The grounding knife switch is provided with There are auxiliary contacts, the communication management module is connected to the auxiliary contacts of the grounding switch in the switch cabinet, the action mechanism includes an electromagnet, a limit rod, a magnetic retaining ring and a lock hook, and the magnetic retaining ring is set The middle part of the limit rod.

When the electromagnet is charged, the magnetic retaining ring on the limit rod is attracted by the electromagnet so that the limit rod breaks away from the lock hook, and the cabinet door is unlocked at this time; when the electromagnet is not charged, the limit The rod falls into the lock hook, and the cabinet door is locked.

The function of the grounding knife switch is to connect the main circuit with the earth through the grounding knife switch during maintenance, so that people can go to the main circuit to carry out maintenance work to ensure safety. When the switch cabinet grounding knife switch is closed, the grounding signal of the auxiliary contact is received by the communication management module, and the communication management module controls the electromagnet to be electrified, so that the action mechanism unlocks the cabinet door; when the switch cabinet grounding knife switch When disconnected, the charged signal of the auxiliary contact is received by the communication management module, and the communication management module controls the electromagnet to be de-energized, so that the action mechanism locks the cabinet door. This structure makes accurate judgment of the electrified condition of the switch cabinet, and the anti-misoperation locking device is unlocked only when the grounding switch is grounded, which greatly improves the safety.

As a preferred technical solution of the present invention, it also includes a ground fault detection device, the ground fault detection device is arranged at the ground terminal of the switch cabinet, the ground fault detection device is connected with the communication management module, when the ground fault detection When the fault detection device detects a ground fault, the communication management module controls the electromagnet to lose power, and keeps the action mechanism to lock the cabinet door. This structure can prevent the auxiliary contact from transmitting a grounding signal to the communication management module when a grounding fault occurs, so that the cabinet door is unlocked and brings hidden dangers to the personal safety of operators.

As a preferred technical solution of the present invention, the ground fault monitoring device includes a collection module for collecting voltage and current, a processing module for determining the existence of a ground fault according to the voltage and current, and a sending module for sending a ground fault signal.

As a preferred technical solution of the present invention, the ground fault detection device is connected with an alarm device.

As a preferred technical solution of the present invention, the longitudinal section of the lock hook is L-shaped, the lock hook is provided with a limiting groove, and the lock hook is fixed to the lock hook fixing plate fixed on the switch cabinet body by screws. Connection, the electromagnet is fixedly connected with the electromagnet fixing plate fixed on the switch cabinet door through screws, the electromagnet is provided with a vertical through groove, and the limit rod is arranged in the through groove.

As a preferred technical solution of the present invention, the communication management module is connected to the action mechanism through a shielded signal line with strong anti-interference capability.

Compared with the prior art, the beneficial effects achieved by the present invention are: ensuring that no misoperation occurs, improving the safety performance of the equipment, further ensuring the safety of operators, greatly improving the production efficiency and product quality of the enterprise, and having reliable High performance, good stability, high safety performance and so on.

Description of drawings

Figure 1 is a schematic diagram of the structure of the action mechanism.

Among the figure: electromagnet 1, limit rod 2, magnetic retaining ring 3, lock hook 4, limit groove 5, lock hook fixing plate 6, electromagnet fixing plate 7, through groove 8.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

An anti-misoperation locking device for a switch cabinet. The anti-misoperation locking device is arranged on the switch cabinet. A grounding switch is provided in the switch cabinet. The anti-misoperation locking device includes a communication management module, an action mechanism and a ground fault detection device. An auxiliary contact is provided on the grounding switch, and the communication management module is connected to the auxiliary contact through a shielded signal line.

As shown in FIG. 1 , the action mechanism includes an electromagnet 1 , a limit rod 2 , a magnetic retaining ring 3 and a lock hook 4 , and the magnetic retaining ring 3 is arranged in the middle of the limit rod 2 . The longitudinal section of the lock hook 4 is L-shaped, and the lock hook 4 is provided with a limit slot 5. The lock hook 4 is fixedly connected with the lock hook fixing plate 6 fixed on the switch cabinet body through screws, and the electromagnet 1 is fixed on the switch through screws. The electromagnet fixed plate 7 on the cabinet door is fixedly connected, and the electromagnet 1 is provided with a vertical through groove 8, and the stop bar 2 is arranged in the through groove 8. When the electromagnet 1 is charged, the magnetic retaining ring 3 on the limit rod 2 is attracted by the electromagnet 1 so that the limit rod 2 breaks away from the lock hook 4, and the cabinet door is unlocked at this time; when the electromagnet 1 is not charged, the limit rod 2 falls in the lock hook 4, and now the cabinet door is locked.

When the switch cabinet grounding switch is closed, the grounding signal of the auxiliary contact is received by the communication management module, and the communication management module controls the electromagnet 1 to be electrified, so that the action mechanism unlocks the cabinet door; when the switch cabinet grounding switch is disconnected, the auxiliary contact The charged signal is received by the communication management module, and the communication management module controls the electromagnet 1 to lose power, so that the action mechanism locks the cabinet door.

The ground fault detection device is installed at the ground terminal of the switch cabinet, and the ground fault detection device is connected with the communication management module. When the ground fault detection device detects a ground fault, the communication management module controls the electromagnet to lose power, and keeps the action mechanism to lock the cabinet door. The ground fault monitoring device includes a collection module for collecting voltage and current, a processing module for determining the presence of a ground fault according to the voltage and current, and a sending module for sending a ground fault signal. Further, the ground fault detection device is connected with an alarm device.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. a kind of switchgear anti-misoperation locking device, the anti-misoperation locking device are arranged on switchgear, ground connection is equipped with switchgear Disconnecting link, it is characterised in that including

Communication management module, the grounding switch are equipped with auxiliary contact, connecing in the communication management module connecting switch cabinet The auxiliary contact of ground disconnecting link,

And actuating mechanism, the actuating mechanism include electromagnet, gag lever post, magnetic baffle ring and latch hook, the magnetism baffle ring is set At the middle part of the gag lever post, when electromagnet is powered, the magnetic baffle ring on the gag lever post is caused by the electromagnetic actuation The gag lever post departs from latch hook, and cabinet door unlocks at this time；When electromagnet is not charged, the gag lever post is fallen into the latch hook, this When cabinet door locking,

After switch-cabinet grounding knife-switch closes, the ground signalling of the auxiliary contact is simultaneously received, institute by the communication management module It is powered to state communication management module control electromagnet so that the actuating mechanism solution locker door；When switch-cabinet grounding knife-switch disconnects, The charged signal of the auxiliary contact is received by the communication management module, and the communication management module controls electromagnet dead electricity, So that the actuating mechanism locking cabinet door.

2. a kind of switchgear anti-misoperation locking device according to claim 1, it is characterised in that further include Earth Fault Detection Device, the ground fault detection device are arranged on the ground terminal of switchgear, the ground fault detection device and the communication Management module is connected, when the ground fault detection device detects earth fault, the communication management module control electricity Magnet dead electricity, keeps the actuating mechanism locking cabinet door.

A kind of 3. switchgear anti-misoperation locking device according to claim 1, it is characterised in that the ground fault detection dress Put including the acquisition module for collection voltages and electric current, the processing mould there are earth fault is determined according to the voltage and current Block and the sending module for sending earth-fault signal.

A kind of 4. switchgear anti-misoperation locking device according to claim 2, it is characterised in that the Earth Fault Detection dress Put and be connected with warning device.

5. a kind of switchgear anti-misoperation locking device according to claim 1, it is characterised in that the latch hook longitudinal section is in L Shape, offers limiting slot on the latch hook, the latch hook is consolidated by screw with the latch hook fixed plate being fixed on switch cabinet body Fixed connection, the electromagnet are fixedly connected by screw with the electromagnet fixed plate being fixed on door of switch cabinet, the electromagnetism Iron is equipped with vertical straight slot, and the gag lever post is arranged in the straight slot.

6. a kind of switchgear anti-misoperation locking device according to claim 1, it is characterised in that the communication management module is led to Shielded signal line is crossed with the auxiliary contact to be connected.