CN202258890U

CN202258890U - A passive forced locking device

Info

Publication number: CN202258890U
Application number: CN 201120243824
Authority: CN
Inventors: 姚建歆; 徐剑; 史华康; 郑季伟; 朱真; 杨振睿; 金琪; 马立伟; 韩一; 余珠明; 沈理; 金毅刚; 冯婷; 蔡潮琪; 江辰
Original assignee: State Grid Shanghai Electric Power Co Ltd; Shanghai Tianling Switchgear Co Ltd
Current assignee: State Grid Shanghai Electric Power Co Ltd; Shanghai Tianling Switchgear Co Ltd
Priority date: 2011-07-12
Filing date: 2011-07-12
Publication date: 2012-05-30
Anticipated expiration: 2021-07-12

Abstract

The utility model discloses a passive forced locking device, which comprises a live detection circuit, a host part connected by a plug connector and an unlocking key; the host part comprises a body with an operation hole, a charged display and an electromagnetic lock, and the unlocking key is provided with a direct-current power supply, so that the power supply problem of a forced locking device of a ring main unit without a low-voltage power supply nearby is solved; the electrified detection circuit is arranged in the host part and the unlocking key, receives signals of the high-voltage sensor, displays the electrified condition, and drives the electromagnetic lock to unlock under the condition of no high-voltage electrification, so that the high-voltage electrification detection and the forced locking are completed at one time. And simultaneously, the utility model discloses still have compact structure, reliable operation, convenient to use, easy to maintain's characteristics.

Description

A kind of passive forced locking device

Technical field

The utility model relates to a kind of passive forced locking device that is used for.

Background technology

Ring main unit is because it is simple and reliable; In the distribution supply network in city, use in a large number; But the wire inlet unit of ring main unit all is the following situation of inlet wire, adopts conventional electromagnetic lock closedown mode scene often because electromagnetic lock control power supply can't be provided, and adopts the emergency release operation; Make the forcing device of ring main unit itself reduce reliability this moment, the pernicious misoperation of charged splice grafting ground switch just might occur preventing.

Therefore, must control, promptly when the on-load switch separating brake, must judge whether the long cable section of ingoing line line side has electricity, just allow splice grafting ground switch when having only cable not charged the operation of earthed switch.To this situation, solution route is exactly in the long cable section of ingoing line side high-voltage electriferous display locking device to be installed, and detects the electrification in high voltage situation through high pressure sensor, allows to open electromagnetic lock according to having or not high pressure to determine whether.High-voltage electriferous display locking device needs working power, and the working power of present most of high voltage display device adopts alternating current-direct current 220V, 110V, direct current 48V, 24V etc.

Chinese patent ZL02283589.X discloses a kind of " the charged demonstration locking device of induction-type high-voltage ", and this locking device needs external 220V power supply, and this locking device is not suitable for the outdoor type ring main unit of no peripheral operation power supply.

China training ZL200420114302.3 discloses a kind of " the charged demonstration locking device of built-in power induction-type high-voltage "; This device is provided with battery in inner bonnet be the locking device power supply; Removed the problem of external power supply from, but maintenance, the replacing problem of having brought battery arranged; If device quantity is many, then brought a lot of inconvenience to use, for safeguarding, also increased a lot of workloads.

The disclosed electrification in high voltage locking device of aforementioned two patents all is to detect the electrification in high voltage situation, will reflect result's output of electrification in high voltage situation again, and device itself does not comprise blocking mechanism.Accomplish electrification in high voltage and detect blocking function; Need special equipment to obtain the uncharged information of high pressure from the electrification in high voltage locking device; Carry out the release of corresponding blocking mechanism again, electrical verification and release can not once be accomplished, and bring charged information and release mechanism corresponding relation problem; More loaded down with trivial details, also there is potential safety hazard.

Summary of the invention

The purpose of the utility model is to overcome the defective of prior art and a kind of passive forced locking device that is used for is provided; This device carries DC power supply; Do not have the powerup issue of the ring main unit forced locking device of low-tension supply near having solved, and electrification in high voltage detection and forced blocking are once accomplished.

The technical scheme that realizes above-mentioned purpose is:

A kind of passive forced locking device, it connects high pressure sensor, and said passive forced locking device comprises a charged testing circuit and the host machine part and the unlock key that connect through a plug connector, wherein:

Said host machine part comprises the body that has a handle hole, is arranged on an electrification display and an electromagnetic lock on the said body, said handle hole be positioned at said electromagnetic lock under;

Said unlock key comprises a direct current power supply, and a push-button switch that is connected with this DC power supply;

Said charged testing circuit comprises the charged display circuit that places said electrification display and connect said high pressure sensor, is connected and places the signal control drive circuit of said body with this charged display circuit, and is connected and places the switch driver of said unlock key through said plug connector with this signal control drive circuit.

Above-mentioned passive forced locking device, wherein, said switch driver and said push-button switch and DC power supply constitute the loop, and said switch driver connection is also controlled a driving switch;

Press said push-button switch, it is closed that said switch driver drives said driving switch, connects said DC power supply and said signal control drive circuit in short-term;

Said charged display circuit receives the high pressure sensor signal, shows charged state, exports high and low level signal and gives said signal control drive circuit;

Said DC power supply and said signal control drive circuit connect in short-term during in, when said signal control drive circuit receives low level signal, make said electromagnetic lock be in blocking; When said signal control drive circuit receives high level signal, make said electromagnetic lock unlock.

Above-mentioned passive forced locking device; Wherein, Said electromagnetic lock comprises that the cuboid electromagnet, that a middle part contains through hole places the dead bolt, of said electromagnet middle part through hole to connect the connecting rod of said dead bolt; And be serially connected in the electric contact between said signal control drive circuit and the said electromagnet, wherein:

Said dead bolt ejects when said electromagnetic lock locking, to shelter from said handle hole; Said dead bolt contracts in when said electromagnetic lock unlock, to expose said handle hole;

Said connecting rod is " T " shape, is driven by said dead bolt;

Said electric contact is realized being connected with said electromagnet or breaking off through the tip of said connecting rod.

Above-mentioned passive forced locking device, wherein, said host machine part also comprises a locking component, this locking component places said body; Said locking component is " recessed " font, and an end of its recess and said connecting rod agrees with, and is used for locking or unclamps said host machine part and being connected of unlock key.

Above-mentioned passive forced locking device, wherein, said electromagnet is a bistable electro-magnet.

Above-mentioned passive forced locking device, wherein, said DC power supply is rechargeable battery or dry cell.

The beneficial effect of the utility model is: the utility model carries DC power supply, does not have the powerup issue of the ring main unit forced locking device of low-tension supply near having solved, and electrification in high voltage detection and forced blocking are once accomplished; The utility model has also been considered resetting behind the unlocking operation (locking) problem, and after maintenance finished, if device is not resetted, unlock key just can't be taken off, and has avoided staying potential safety hazard; When carrying out unlock command, this device can regularly be switched on, and reduces power consumption; Simultaneously, this device also has compact conformation, and reliable operation is easy to use, the characteristics that are easy to safeguard.

Description of drawings

Fig. 1 is the structured flowchart of the passive forced locking device of the utility model;

Fig. 2 a, Fig. 2 b and Fig. 2 c be respectively the A-A of front view, Fig. 2 a of the passive forced locking device of the utility model to the B-B of profile and Fig. 2 a to profile;

Fig. 3 is the circuit theory diagrams of the passive forced locking device of the utility model;

Fig. 4 a and Fig. 4 b are respectively the structural representation of the passive forced locking device of the utility model when released state and blocking;

Fig. 5 a and Fig. 5 b are respectively the structural representation of electromagnetic lock when released state and blocking of the passive forced locking device of the utility model.

Embodiment

To combine accompanying drawing that the utility model is described further below.

See also Fig. 1, Fig. 2 and Fig. 3, and combine Fig. 4 and Fig. 5, a kind of passive forced locking device of the utility model; Comprise the host machine part 1 and unlock key 2 that connect through plug connector 4; Also comprise placing host machine part 1 and unlock key 2 charged testing circuit (not shown), wherein

Host machine part 1 comprises the body 11 that has a handle hole 111, is arranged on electrification display 12 and electromagnetic lock 13 on the body 11, handle hole 111 be positioned at electromagnetic lock 13 under;

Unlock key 2 comprises a direct current power supply 21, and the button switch K that is connected with this DC power supply 21;

Charged testing circuit (not shown) comprises the charged display circuit 31 that places electrification display 12 and connect high pressure sensor 5, is connected and places the signal control drive circuit 32 of body 11 with this charged display circuit 31, and is connected and places the switch driver 33 of unlock key 2 through plug connector 4 with this signal control drive circuit 32.

Switch driver 33 and button switch K and DC power supply 21 formation loops; Switch driver 33 controls one driving switch K1; When pressing the button K switch, switch driver makes 33 controlling and driving K switch, 1 closure, and DC power supply 21 is connected with signal control drive circuit 32 in short-term; Charged display circuit 31 receives the high pressure sensor signal, shows charged state, exports high and low level signal and gives signal control drive circuit 32; In the time that DC power supply 21 and signal control drive circuit 32 are connected in short-term; Signal control drive circuit 32 receives low level signal, does not drive electromagnetic lock 13 releases, electromagnetic lock locking this moment; Signal control drive circuit 32 receives high level signal, then drives electromagnetic lock 13 releases.

Electromagnetic lock 13 comprises that the cuboid electromagnet 131, that a middle part contains through hole places the dead bolt 132, of the middle part through hole of electromagnet 131 to connect the connecting rod 134 of dead bolt 132, and is serially connected in the electric contact 135 between first circuit 32 and the electromagnet 131; Connecting rod 134 is " T " shape, is driven by dead bolt 132.

Host machine part 1 is installed in high-voltage switch gear cashier's office in a shop after pegging graft with unlock key 2, inserts handle hole 111 through operating grip and can carry out the operation of switch cubicle; See also Fig. 5, when electromagnetic lock 13 lockings, dead bolt 132 ejects, and can block handle hole 111, and operating grip can not be inserted, and when electromagnetic lock 13 releases, dead bolt 132 contracts in being realized by electromagnet 131 controls, no longer blocks handle hole 111.

See also Fig. 4; When signal control drive circuit 32 drives electromagnetic lock 13 releases, promptly contract dead bolt 132 drivening rods 134 in the electromagnet 131 control dead bolts 132; Thereby the disconnection of the tip of connecting rod 134 is connected with electric contact 135, no longer power consumption after 13 releases of assurance electromagnetic lock.

Host machine part 1 also comprises a locking component 14, and locking component 14 places body 11; Locking component 14 is " recessed " font; One end of its recess and connecting rod 134 agrees with; Locking component 14 connects host machine part 1 and unlock key 2; After host machine part 1 and unlock key 2 were in inserting state, if electromagnetic lock 13 releases, locking component 14 made host machine part 1 and unlock key 2 keep inserting state not separate; If electromagnetic lock 13 lockings, locking component 14 resets thereupon, and host machine part 1 can be separated with unlock key 2.

Electromagnet 131 is a bistable electro-magnet; DC power supply 21 is rechargeable battery or dry cell.

See also Fig. 3; Charged display circuit 31 comprises three identical unit; Each unit comprises a rectifier bridge (U1 or U2 or U3); First ac input end of rectifier bridge (U1 or U2 or U3) connects one first resistance (Ra1 or Rb1 or Rc1); The second ac input end ground connection, first dc output end of rectifier bridge (U1 or U2 or U3) connect second resistance (Ra2 or Rb2 or Rc2), the 3rd resistance (Ra3 or Rb3 or Rc3) and diode (Da or Db or Dc) successively, and second dc output end connects one the 4th resistance (Ra4 or Rb4 or Rc4);

Each unit also comprises one first electric capacity (C1 or C2 or C3) and a light-emitting diode (D1 or D2 or D3); One end of first electric capacity (C1 or C2 or C3) connects the end that joins of second resistance (Ra2 or Rb2 or Rc2) and the 3rd resistance (Ra3 or Rb3 or Rc3); The other end connects second dc output end of rectifier bridge (U1 or U2 or U3); The positive pole of light-emitting diode (D1 or D2 or D3) connects the end that joins of second resistance (Ra2 or Rb2 or Rc2) and the 3rd resistance (Ra3 or Rb3 or Rc3), and negative pole connects second dc output end of rectifier bridge (U1 or U2 or U3); The positive pole of diode (Da or Db or Dc) connects the 3rd resistance (Ra3 or Rb3 or Rc3), and negative pole connects first output of charged display circuit 31; The 4th resistance (Ra4 or Rb4 or Rc4) connects second output of charged display circuit 31.

In the present embodiment, the model selected for use of switch driver 33 is SA/S2.10.1.

The foregoing description provides to being familiar with personnel in this area and realizes or use the utility model; Being familiar with those skilled in the art can be under the situation of the invention thought that does not break away from the utility model; The foregoing description is made various modifications or variation; Thereby the protection range of the utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.

Claims

1. A passive forced locking device, which is connected to a high-voltage sensor, is characterized in that the passive forced locking device includes a live detection circuit and a host part and an unlocking key connected by a plug connector, wherein:

The host part includes a body with an operation hole, a charging display arranged on the body, and an electromagnetic lock, and the operation hole is located directly below the electromagnetic lock;

The unlocking key includes a DC power supply, and a button switch connected to the DC power supply;

The charge detection circuit includes a charge display circuit placed in the charge display and connected to the high voltage sensor, a signal control drive circuit connected to the charge display circuit and placed in the body, and a signal control drive circuit connected to the charge display circuit A switch driver connected through the plug connector and placed in the unlocking key.

2. The passive forced locking device according to claim 1, wherein the switch driver forms a loop with the push button switch and a DC power supply, and the switch driver is connected to and controls a drive switch;

Press the button switch, the switch driver drives the drive switch to close, and short-term connects the DC power supply and the signal control drive circuit;

The charging display circuit receives the high-voltage sensor signal, displays the charging status, and outputs high and low level signals to the signal control driving circuit;

During the period when the DC power supply and the signal control drive circuit are connected for a short time, when the signal control drive circuit receives a low-level signal, the electromagnetic lock is in a locked state; when the signal control drive circuit A high-level signal is received to unlock the electromagnetic lock.

3. The passive forced locking device according to claim 1, wherein the electromagnetic lock comprises a cuboid electromagnet with a through hole in the middle, a deadbolt placed in the through hole in the middle of the electromagnet, A connecting rod connecting the deadbolt, and an electric contact connected in series between the signal control drive circuit and the electromagnet, wherein:

The deadbolt pops up when the electromagnetic lock is locked to cover the operation hole; the deadbolt retracts when the electromagnetic lock is unlocked to expose the operation hole;

The connecting rod is "T" shaped and driven by the deadbolt;

The electrical contact is connected or disconnected from the electromagnet through the tip of the connecting rod.

4. The passive forced locking device according to claim 1 or 3, characterized in that, the host part further includes a locking part, which is placed in the body; the locking part is in the shape of " Concave" shape, the concave portion of which fits with one end of the connecting rod, and is used to lock or release the connection between the host part and the unlocking key.

5. The passive forced locking device according to claim 3, wherein the electromagnet is a bistable electromagnet.

6. The passive forced locking device according to claim 1, wherein the DC power supply is a rechargeable battery or a dry battery.