CN202196675U

CN202196675U - Misoperation prevention locking device for ring main unit

Info

Publication number: CN202196675U
Application number: CN201120349440XU
Authority: CN
Inventors: 陈浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-19
Filing date: 2011-09-19
Publication date: 2012-04-18
Anticipated expiration: 2021-09-19

Abstract

The utility model relates to a misoperation prevention locking device for a ring main unit. The misoperation prevention locking device comprises a lock catch mechanism, an unlocking key, a high voltage capacitor mutual inductor and a live detection circuit, wherein the lock catch mechanism is arranged on a panel of the ring main unit; the unlocking key is suitable for being matched with the lock catch mechanism in an inserted mode; the live detection circuit is connected with a signal output end of the high voltage capacitor mutual inductor; an electromagnet and a driving circuit for driving the electromagnet to operate when no high voltage electricity is detected by the live detection circuit are arranged in the lock catch mechanism; the unlocking key is suitable for providing a driving power supply for the driving circuit; the lock catch mechanism also comprises a mask which is arranged in front of an operating hole through a torsional spring and a reset rod which is suitable for being matched with a lock catch on the inner side surface of the mask in an inserted mode; and the reset rod is a movable iron core of the electromagnet. When no high voltage exists, after the unlocking key outputs an unlocking driving signal, the electromagnet is powered on and drives the reset rod to simultaneously move downwards, the lock catch is separated from the reset rod, the mask is overturned upwards under the action of the torsional spring, the operating hole is exposed, and at the time, the locking device is in an unlocking state.

Description

Ring main unit anti-incorrect manipulation deadlock device

Technical field

The utility model relates to a kind of locking device that prevents the high voltage switchgear electric misoperation, belongs to the electric power project engineering field, specifically is a kind of ring main unit anti-incorrect manipulation deadlock device.

Background technology

In electric power system, prevent charged misoperation, guarantee to send out, the safe and reliable operation of controller switching equipment and electric line is also to be one of most important requirement primarily, just in case have an accident, enormous economic loss be will cause, even equipment and personal safety jeopardized.For this reason, the power industry mandatory requirement takes to prevent the electric misoperation device in electric power system, to satisfy electric power " five is anti-" requirement.

So-called electric power " five is anti-" is meant: prevent that mistake from dividing, mistake is closed circuit breaker, prevent the on-load branch, close isolating switch, prevent charged hanging earthing conductor or splice grafting ground switch, prevent to be with earth connection or separate earthed switch and close isolating switch, prevent mistakenly entering charged chamber.The device that prevents electric misoperation is a lot, like Mechanically programm's lock, electric field lock, microcomputer locking etc.But ring main unit is because the normal ring network power supply form that adopts of power supply, promptly hand-in-hand network power supply mode, and this moment, the mechanical anti-misoperation locking device of ring main unit itself can not prevent the charged misoperations such as cabinet door, charged and ground connection cutter of opening.

With regard to the problems referred to above, can adopt operating mechanism to interlock according to the charged situation of high pressure, operating mechanism locking when height is pressed with electricity, when high pressure does not have electricity, the operating mechanism release.This type of locking device generally adopts back work power mode power supply ability operate as normal at present, and the scheme that adopts the voltage transformer power taking is also arranged.

Chinese patent ZL 200920256302.X open " a kind of online anti-misoperation locking device ", this locking device adopts the online scheme of micro_computer five_proof, and system must provide the power supply of AC220V, and this device can not use on the ring main unit of low-tension supply not having.

Chinese patent ZL 200820215441.3 open " ring main unit anti-incorrect manipulation deadlock device "; This locking device; Comprise reference circuit, voltage collection circuit, voltage comparator circuit, drive circuit, DC power supply, booster circuit, current-limiting circuit, accumulator, switch and electromagnet; Its mechanism is complicated, and the voltage manner of comparison is only leaned in charged detection again, and circuit reliability is extremely low under switch cubicle highfield environment; Its live monitoring device and mechanism are installed together in addition, often cause ring main unit and former potential indicator not to work simultaneously.

The utility model content

The technical problem that the utility model will solve provides and a kind ofly is suitable for not using external accessory power supply and realizes that height is pressed with the reliable locking of electricity, the ring main unit anti-incorrect manipulation deadlock device of unlocking function when high pressure does not have electricity.

For solving the problems of the technologies described above; The ring main unit anti-incorrect manipulation deadlock device that the utility model provides comprises: be located at latching device on the panel of ring main unit, be suitable for and this latching device charged testing circuit that the unlock key that cooperates, high-voltage capacitance instrument transformer link to each other with signal output part with this high-voltage capacitance instrument transformer of pegging graft; Be provided with in the said latching device: electromagnet and when said charged testing circuit records no high-tension electricity, drive the drive circuit of this electromagnet action; Said unlock key is suitable for to said drive circuit driving power being provided; Said latching device also comprises: through torsion spring be located at handle hole the place ahead face shield, be suitable for snap close on the medial surface with face shield and intert the release link that cooperates, this release link is the movable core of electromagnet.

Further, said unlock key comprises: be located at the battery in the housing, the switching circuit that links to each other with battery, the power supply output circuit that links to each other with switching circuit and the driving indicating circuit that is used to indicate switching circuit and power supply status.

Further, said charged testing circuit comprises successively and to link to each other: signal input protection circuit, charged indicating circuit and be used to control the pulse signal broadening and the exclusive circuit of said drive circuit.The signal output part of said high-voltage capacitance instrument transformer links to each other with said signal input protection circuit.

Particularly, said electromagnet is a bistable electro-magnet.

The blocking of this locking device is exactly the reset mode of electromagnet, and this moment, face shield was closed, and release link is interted in the snap close on the face shield medial surface, and face shield shelters from handle hole, and can not operate ring main unit mechanism this moment; When high pressure, said pulse signal broadening and exclusive circuit are controlled said drive circuit and are opened circuit all the time, and electromagnet can't be moved, and then make latching device keep locking; When no high pressure, behind unlock key output unlock drive signal, electromagnet gets electric and drives release link simultaneously to bottom offset, and snap close separates with release link, and face shield upwards opens under the torsion spring effect, exposes handle hole, and this moment, this locking device was in released state.After operation is accomplished, push down face shield to reset mode, push back release link simultaneously to reset mode, device is in blocking.

Be used for after unlock key is plugged to the power supply of charged testing circuit, if said charged testing circuit records current no high-tension electricity, then charged testing circuit output drive signal under can the situation of release is given the latching device release.

The technique effect that the utlity model has: the ring main unit anti-incorrect manipulation deadlock device of (1) the utility model comprises: latching device, unlock key, charged testing circuit and high-voltage capacitance instrument transformer, latching device are installed on the ring main unit panel, adopt electromagnet as executive component in the latching device; The high-voltage capacitance transducer signal inserts charged testing circuit; Charged testing circuit is used to detect and indicate the electriferous state of high pressure, and when high pressure, said pulse signal broadening and exclusive circuit are controlled said drive circuit and opened circuit all the time; Electromagnet can't be moved; And then make latching device keep locking, the locking key of separating that testing result is pressed unlock key during for no high pressure, latching device release; Thereby realize forced blocking switch cubicle operating grip and cabinet door; To prevent splice grafting ground switch when charged, improve the anti-error performance of switchgear, guarantee personal safety.(2) charged testing circuit employing is split type, and the bore size of compatible original ring main unit adopts passive charged indication and is provided with pulse signal broadening lock-in circuit, to guarantee the reliable and stable of circuit.(3) latching device comprises rotatable face shield, and electromagnet is used in release, and under the device reset mode, face shield covers handle hole; In the time of no high pressure, after the unlock key release, electromagnetic actuation; Releasable catch mechanism, face shield overturns under the drive of torsion spring, exposes handle hole.(4) unlock key and latching device adopt the plug type structure; The design of solenoid actuated exclusive circuit is in charged testing circuit part; The inner no circuit of latching device; Make latching device more reliable,, need not to change latching device as long as change charged testing circuit even solenoid driver circuit damages.(5) charged testing circuit also can the charged state of passive indication except block signal is provided.

Description of drawings

For the content that makes the utility model is more clearly understood, below basis specific embodiment and combine accompanying drawing, the utility model is done further detailed explanation, wherein

Fig. 1 is that the ring main unit anti-incorrect manipulation deadlock apparatus structure among the embodiment is formed sketch map;

Fig. 2 is that the charged testing circuit structure among the embodiment is formed sketch map;

Fig. 3 is that the unlock key structure among the embodiment is formed sketch map;

Fig. 4 is the Facad structure figure of the panel of said ring main unit anti-incorrect manipulation deadlock device when closed;

Fig. 5 is the construction profile of Fig. 4;

Facad structure figure when Fig. 6 is the panel release of said ring main unit anti-incorrect manipulation deadlock device;

Fig. 7 is the construction profile of Fig. 6.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is elaborated:

The ring main unit anti-incorrect manipulation deadlock device of present embodiment comprises: be located at latching device 1 on the panel of ring main unit, be suitable for and this latching device 1 charged testing circuit 3 that the unlock key 2 that cooperates, high-voltage capacitance instrument transformer 4 link to each other with signal output part with this high-voltage capacitance instrument transformer 4 of pegging graft; Be provided with in the said latching device 1: electromagnet 5 and when said charged testing circuit 3 records no high-tension electricity, drive the drive circuit of this electromagnet 5 actions; Said unlock key 2 is suitable for to said drive circuit driving power being provided; Said latching device 1 also comprises: through torsion spring be located at handle hole 13 the place aheads face shield 12, be suitable for snap close 15 on the medial surface with face shield 12 and intert the release links 14 that cooperate, this release link 14 is the movable core of electromagnet 5.

Said unlock key 2 comprises: be located at the battery 21 in the housing, the switching circuit 22 that links to each other with battery 21, the power supply output circuit 24 that links to each other with switching circuit 22 and be used to indicate switching circuit whether to press with power supply whether drive indicating circuit 23 normally.

Said charged testing circuit 3 comprises successively and to link to each other: signal input protection circuit 31, charged indicating circuit 32 and be used to control the pulse signal broadening and the exclusive circuit 33 of said drive circuit; The signal output part of said high-voltage capacitance instrument transformer 4 links to each other with said signal input protection circuit 31.

Said electromagnet 5 is a bistable electro-magnet.

The blocking of this locking device is exactly the reset mode of electromagnet 5, this moment face shield 12 closures, release link 14 is interted in the snap close 15 on face shield 12 medial surfaces, face shield 12 shelters from handle hole 13, can not operate ring main unit mechanism this moment;

During no high pressure, behind unlock key 2 output unlock drive signals, electromagnet 5 electric and drive release link 14 simultaneously to bottom offset; Snap close 15 separates with release link 14; Face shield 12 upwards opens under the torsion spring effect, exposes handle hole 13, and this moment, this locking device was in released state.After operation is accomplished, push down face shield 12 to reset mode, push back release link 14 simultaneously to reset mode, device is in blocking.

Be used for after unlock key 2 is plugged to 3 power supplies of charged testing circuit, if said charged testing circuit 3 records current no high-tension electricity, then charged testing circuit 3 output drive signal under can the situation of release is given latching device 1 release.

Obviously, the foregoing description only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these spirit that belong to the utility model are extended out or change still are among the protection range of the utility model.

Claims

1. ring main unit anti-incorrect manipulation deadlock device is characterized in that comprising: be located at latching device (1) on the panel of ring main unit, be suitable for and this latching device (1) charged testing circuit (3) that the unlock key (2) that cooperates, high-voltage capacitance instrument transformer (4) link to each other with signal output part with this high-voltage capacitance instrument transformer (4) of pegging graft;

Said latching device is provided with in (1): electromagnet (5) and drive the drive circuit of this electromagnet (5) action when recording no high-tension electricity at said charged testing circuit (3);

Said unlock key (2) is suitable for to said drive circuit driving power being provided;

Said latching device (1) also comprises: through torsion spring be located at handle hole (13) the place ahead face shield (12), be suitable for face shield (12) medial surface on snap close (15) intert the release link (14) cooperate, this release link (14) is the movable core of electromagnet (5).

2. ring main unit anti-incorrect manipulation deadlock device according to claim 1; It is characterized in that: said unlock key (2) comprising: be located at the battery (21) in the housing; The switching circuit (22) that links to each other with battery (21), the power supply output circuit (24) that links to each other with switching circuit (22) and be used to indicate the driving indicating circuit (23) of switching circuit and power supply status.

3. ring main unit anti-incorrect manipulation deadlock device according to claim 1 and 2 is characterized in that: said charged testing circuit (3) comprises successively and to link to each other: signal input protection circuit (31), charged indicating circuit (32) and be used to control the pulse signal broadening and the exclusive circuit (33) of said drive circuit; The signal output part of said high-voltage capacitance instrument transformer (4) links to each other with said signal input protection circuit (31).

4. ring main unit anti-incorrect manipulation deadlock device according to claim 1 and 2 is characterized in that: said electromagnet (5) is a bistable electro-magnet.