CN212114525U - Locking device for preventing false opening of the busbar compartment of the switchgear - Google Patents

Abstract

The utility model discloses an anti-misopening locking device for a switch cabinet bus bar compartment, comprising a cabinet top cover plate rotating leaflet (2), a locking hole (3) and a locking groove (4), and the cabinet top cover plate rotating leaflet (2) is fixed On the top side of the busbar cabinet and connected with the cabinet top cover (1), one side of the cabinet top cover (1) can rotate around the cabinet top cover to rotate the leaflet (2), and the locking groove (4) is fixed in the busbar compartment On the other side of the cabinet top, the other side of the cabinet top cover plate (1) is fixed with a locking hole (3) matched with the locking groove (4). A locking electromagnet is installed in the locking groove (4) to realize locking or unlocking of the cabinet top cover plate (1). By installing a locking mechanism on the top cover of the busbar cabinet, the locking and unlocking of the top cover of the busbar cabinet can be realized, the top cover of the busbar cabinet can be locked accurately and reliably, and the top cover of the cabinet can be effectively prevented from entering the live electricity by mistake. The interval greatly increases the safety of the cabinet top work.

Description

Locking device for preventing false opening of the busbar compartment of the switchgear

technical field

The utility model relates to the technical field of electrical equipment safety, in particular to an anti-misopening latching device for a bus bar compartment of a switch cabinet.

Background technique

High-voltage switchgear is a kind of electrical equipment, which is used for on-off, control or protection in the power generation, transmission, distribution, power conversion and consumption of the power system. Circuit breaker, prevent the disconnection switch (or handcart contact) with load, prevent the ground wire from being hooked (close the ground switch), prevent the ground wire (grounding knife) from closing and power on, and prevent entering the live interval by mistake. Most of the existing switchgear’s anti-inadvertent live separation functions refer to the following two functions: 1) After the handcart of the circuit breaker is pulled out, the shutter of the handcart compartment is automatically closed to isolate the high-voltage live part; 2) The grounding switch and the cable room are realized. Mechanical interlocking of door panels. When there is no electricity on the line side and the handcart is in the test position, turn on the grounding switch, the hook on the door panel is unlocked, and the cable compartment door panel can be opened at this time. However, when working on the top of the cabinet, there is no relevant mechanical locking or electrical locking device. When the maintenance personnel open the busbar compartment above the cabinet top to work, there is no relevant live indication on the top of the cabinet for reference.

In the prior art, in order to avoid electric shock casualties caused by accidental opening of the live interval by maintenance personnel when the bus bar warehouse is carried out on the top of the cabinet, generally before the maintenance work is started, a screen is set on the top of the cabinet to isolate the live part from the maintenance part, and pass the The staff below confirms whether the busbar compartment is live through the front panel, and relies on the method of setting up a block on the top of the cabinet to ensure the safety of the operator. However, the existing technology still cannot meet the switch cabinet. When the switch cabinet bus is powered off, once the operation or maintenance personnel are unfamiliar with the on-site switch cabinet wiring, they will place the shield in the wrong position, and the consequences will be unimaginable. Some switchgears do not have a transparent observation window at the rear and upper part. It is difficult to confirm the direction of the busbars at the segment and isolation switchgear on the spot. It is only possible to set up barriers based on experience, and it is also possible to set the barriers incorrectly. During maintenance, inexperienced maintenance personnel move the block by mistake or forget to restore, which may also cause the erroneous entry of the live interval. Only relying on artificially setting up safety barriers has great limitations. Once the personnel confirm the error or the communication information is wrong, the staff on the top of the cabinet may open the live interval bus bar by mistake, resulting in electric shock casualties of the maintenance personnel, resulting in serious consequences. Therefore, there is an urgent need for an anti-misopening latching device for a switchgear busbar compartment to solve the above problems.

Utility model patent content

After long-term exploration and practice, the inventor has designed and developed an anti-misopening latching device for the busbar compartment of the switchgear, which has well solved the problems in the prior art.

The technical scheme of the present utility model is as follows:

The switch cabinet busbar compartment anti-misopening locking device is used to switch the closed state of the cabinet top cover when the busbar cabinet top is operating, and is characterized in that it includes a cabinet top cover rotating leaflet, a locking hole and a locking slot, wherein,

The top cover of the cabinet is hinged to one side of the top of the busbar cabinet through the rotating leaflet of the top cover, the locking groove is fixed on the other side of the top of the busbar cabinet, the locking electromagnet is installed in the locking groove, and the other side of the top cover is fixed with a The locking hole matched with the locking groove,

The electromagnet power source is drawn from the bus bar cabinet, and is controlled by the bus bar bin locking control circuit to lock or unlock the top cover of the cabinet. The normally open node KS and the latching electromagnet Y1, when the busbar is powered off, close the busbar grounding knife, the normally open node KS is closed, the latching electromagnet Y1 on the top of the busbar cabinet is energized, and the top cover of the busbar cabinet can be opened normally. Work; if the busbar grounding knife is not turned on, the normally open node KS is disconnected, the latching electromagnet Y1 on the top of the busbar cabinet is de-energized and released, and the top cover of the busbar cabinet cannot be opened.

Preferably, it also includes blocking electromagnets Y2-YN, all of which are connected in parallel with the blocking electromagnet Y1 and are connected in series with the normally open node KS.

Preferably, the locking electromagnet can be replaced with five anti-locks.

Preferably, the locking electromagnet can be replaced with an electronic lock.

Preferably, the connection between the cabinet top cover and the busbar cabinet top is a slideway connection.

The utility model has the advantages that by adding a locking mechanism on the top cover plate of the busbar cabinet, the locking and unlocking of the top cover plate of the busbar cabinet can be realized, and the locking of the top cover plate of the busbar cabinet can be realized accurately and reliably, effectively It can prevent the staff on the top of the cabinet from entering the live space by mistake, which greatly increases the safety of the work on the top of the cabinet.

Description of drawings

Fig. 1 is the structure diagram of the anti-misopening locking device of the switchgear busbar compartment of the utility model,

Fig. 2 is the locking electromagnet control circuit diagram of the anti-misopening locking device of the switch cabinet bus bar compartment of the utility model,

in,

1. Cabinet top cover, 2. Cabinet top cover rotating leaflet, 3. Locking hole, 4. Locking slot, 5. Normally open node KS, 6. Locking electromagnet Y1, 7. Locking electromagnet Y2-YN.

Detailed ways

The present utility model and its specific embodiments will now be further described with reference to the accompanying drawings.

The anti-misopening locking device for the busbar compartment of the switch cabinet of the present invention is used to switch the closed state of the cover plate 1 on the top of the cabinet during operation on the top of the busbar compartment, as shown in FIG. Hole 3 and locking slot 4, the rotating leaflet 2 of the top cover of the cabinet is fixed on the top side of the busbar cabinet and connected with the top cover 1 of the cabinet. The locking slot 4 is fixed on the other side of the bus bar cabinet top, and the other side of the cabinet top cover plate 1 is fixed with a locking hole 3 matched with the locking slot 4 .

In a specific embodiment of the present invention, a locking electromagnet is installed in the locking groove 4, and the power supply of the electromagnet is led out from the busbar cabinet, and is controlled by the locking control circuit of the busbar cabinet to realize the locking of the top cover 1 of the cabinet. or unlocked. As shown in Figure 2, the busbar compartment locking control circuit includes the normally open node KS5 and the latching electromagnet Y16, which are obtained from the PT cabinet busbar grounding knife or the grounding handcart in-position signal. When the busbar is powered off, the busbar grounding knife is closed, and the normally open node When KS5 is closed, the latching electromagnet Y16 on the top of the busbar cabinet is energized and closed, and the top cover 1 of the busbar cabinet can be opened normally for work; if the busbar grounding knife is not closed, the normally open node KS5 is disconnected, and the top of the busbar cabinet is locked The electromagnet Y16 is de-energized and released, and the top cover 1 of the busbar cabinet cannot be opened. As shown in Figure 2, it also includes blocking electromagnets Y2-YN7, where N is a positive integer not less than 1, all of which are connected in parallel with the blocking electromagnet Y16 and are connected in series with the normally open node KS5.

In a specific embodiment of the present invention, five anti-locks or electronic locks are installed on the locking groove 4 to cooperate with the locking holes 3, and the five anti-locks or electronic locks are selected to be opened or locked according to the operation and power supply state. Lock.

In another specific embodiment of the present invention, the connection mode between the cabinet top cover 1 and the busbar cabinet top is a slideway connection, or a hanging connection and the like.

For the judgment of whether the busbar is live, the monitoring and control device can also collect the liveness display signals of all switch cabinets of the busbar, judge whether the busbar compartment can be opened through logical operation, and finally send a control signal to the locking electromagnet to realize the detection of the top cover 1 of the busbar cabinet. Unlock and lock.

Finally, it should be noted that the above is only the specific implementation of this case or the description of the specific implementation, and the protection scope of this case is not limited to this. Any thought of changes or substitutions should be covered within the scope of protection of this case. The scope of protection in this case shall be subject to the scope of protection of the claims.

Claims (5)

1. The open-close lock device for preventing the false opening of the bus compartment of the switch cabinet is used for switching the closed state of a cabinet top cover plate (1) when the top of the bus compartment cabinet works, and is characterized by comprising a cabinet top cover plate rotating hinge (2), a locking hole (3) and a locking groove (4), wherein,

a top cover plate (1) of the cabinet is hinged with one side of the top of the bus bin through a top cover plate rotating hinge (2), a locking groove (4) is fixed at the other side of the top of the bus bin, a locking electromagnet is installed in the locking groove (4), a locking hole (3) matched with the locking groove (4) is fixed at the other side of the top cover plate (1) of the cabinet,

the electromagnet power supply is led out from the bus bin cabinet and is controlled by a bus bin locking control loop to lock or unlock the top cover plate of the cabinet, the bus bin locking control loop comprises a normally open node KS (5) and a locking electromagnet Y1(6) which are taken from bus grounding knives or grounding handcart in-place signals, when buses are powered off, the bus grounding knives are closed, the normally open node KS (5) is closed, the locking electromagnet Y1(6) at the top of the bus bin cabinet is electrified and sucked, and the top cover plate (1) of the bus bin cabinet can be normally opened to work; if the bus grounding knife is not closed, the normally open node KS (5) is disconnected, the latching electromagnet Y1(6) at the top of the bus cabinet loses power and is released, and the top cover plate (1) of the bus bin cabinet cannot be opened.

2. The device for preventing the open-close lock of the bus bin of the switch cabinet from being mistakenly opened according to claim 1, further comprising locking electromagnets Y2-YN (7) which are connected in parallel with the locking electromagnet Y1(6) and are connected in series with the normally open node KS (5).

3. The device for preventing the opening and closing of the switch cabinet bus bar bin by mistake as claimed in claim 1, wherein the locking electromagnet can be replaced by a five-prevention lock.

4. The device for preventing the open and close of the bus bar bin of the switch cabinet according to claim 1, wherein the locking electromagnet can be replaced by an electronic lock.

5. The switch cabinet bus bar bin open/close lock device capable of preventing mistaken opening according to claim 1, wherein the connection mode of the cabinet top cover plate (1) and the bus bar bin top is a slide way connection.

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