CN200983345Y - Electronic magnetic intelligent switch - Google Patents

Electronic magnetic intelligent switch Download PDF

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Publication number
CN200983345Y
CN200983345Y CN 200420091732 CN200420091732U CN200983345Y CN 200983345 Y CN200983345 Y CN 200983345Y CN 200420091732 CN200420091732 CN 200420091732 CN 200420091732 U CN200420091732 U CN 200420091732U CN 200983345 Y CN200983345 Y CN 200983345Y
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CN
China
Prior art keywords
arc
contact
switch
arc extinguishing
coil
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Expired - Fee Related
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CN 200420091732
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Chinese (zh)
Inventor
刘理
刘天保
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Individual
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Individual
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Priority to CN 200420091732 priority Critical patent/CN200983345Y/en
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Publication of CN200983345Y publication Critical patent/CN200983345Y/en
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Abstract

The utility model provides an electro-magnetic intelligent switch used in electrical system, that is, an electro-magnetic intelligent arc-extinguishing device is arranged on a breakback contact of an ordinarily hand-operated or a power-driven separated switch, and the breakback contact is connected with the arc-extinguishing device. When the switch is disconnected, a movable contact introduces the electric arc into the arc-extinguishing chamber through an assistance contact to extinguish arc. The arc-extinguishing chamber is composed of four arc-extinguishing sections in series connection. The first three arc-extinguishing sections are arranged around the magnetic blowout coil, the fourth section is arranged on the front side of the arc-extinguishing cover. When the switch is turned on and a line fault exits, the switch can check out the line fault through an intelligent checkout gear, thereby the switch of a positively-closing switch can drop out timely and closing the lock due to belt malfunction is avoided. The switch with air as insulating medium extinguishes arc with an electro-magnetic cell, the switch has simple structure and appreciable breaking dots, and can check out malfunction to avoid closing the switch due to belt malfunction, and is applicable to medium or high voltage systems as a circuit breaker.

Description

Electronic electromagnetic intelligent switch
Technical field
The utility model relates to a kind of high-voltage switch gear that is used for electric power system, especially a kind of electronic electromagnetic intelligent switch.
Background technology
The applicant discloses a kind of electronic electromagnetic disconnect in ZL992347327, its major defect is auxiliary contact K WCoiling shell rotation 630 degree make complex structure, and it is difficult to make; This section arc extinguishing district arc-chute is a pottery, and metal mixed is used, and quantity is too much; Electronic component has adopted controllable silicon, and circuit is complicated, and volume is bigger.At present all switches can not differentiate that all circuit has fault-free when closing a floodgate in addition, and tape jam closes a floodgate to cause and causes damage by force.
Summary of the invention
In order to overcome the deficiencies in the prior art, the electronic electromagnetic intelligent switch that the utility model provides a kind of simple in structure, with low cost, dependable performance and has been easy to make.
The purpose of this utility model is achieved through the following technical solutions: a kind of electronic electromagnetic intelligent switch comprises isolating switch, at the mains side fixed contact K of isolating switch AOn electromagnetic arc blowout device 1 is installed, this device is composed in series by four sections arc extinguishing districts, blowout coil W is contained in first section arc extinguishing district 1With alloy arc extinguishing grid pieces G C, blowout coil W 1A termination auxiliary contact K is arranged N, the other end and fixed contact K AConnect fixed contact K AOn striking contact K is housed cSecond section arc extinguishing district is arranged on auxiliary contact K NWith K WBetween, with coil W 2With alloy arc extinguishing grid pieces Gh parallel connection; Above-mentioned two sections arc extinguishing districts are arranged at blowout coil W 1And W 2The below; The 3rd section arc extinguishing district is arranged on auxiliary contact K wWith K DBetween, coiling shell C rotation 270 degree, and with by ceramic arc extinguishing grid pieces G pAnd two sidewalls that are positioned at its upper and lower ceramic arc suppressing cover Pc, the line formed. circle W 3, resistance R and protective tube F parallel connection, outside ceramic arc suppressing cover Pc both sides, refilled Q unshakable in one's determination wThe 4th section arc extinguishing district is arranged on auxiliary contact K DWith K LBetween, with irony arc extinguishing grid pieces G IWith high back-pressure diode D parallel connection.
In such scheme, in order to realize having the purpose of intelligent function, at the mains side fixed contact K of isolating switch ALead-in wire be provided with current transformer CT, the luminous tube LD of the secondary circuit of current transformer CT by supporting insulator inside reaches intelligent apparatus in the construction of switch case with optical fiber with signal, described intelligent apparatus amplifies timing device by the signal coupling and forms.
In this programme, in order to accelerate electric Arc Motion speed, at mains side fixed contact K AStriking contact K cThe inboard is provided with mobilizable Q unshakable in one's determination A
In addition, arc extinguishing grid pieces G in the 3rd section arc extinguishing district pShape by forward direction after, by widely narrowing down, shortening by long by thick attenuation, spacing, the both sides, top of arc-extinguish chamber Pc have arc spraying mouth J alternately.
In the such scheme, at coil W 1, W 2, W 3An independently coil W also is set outward separately 4With piezo-resistance Y R
Simultaneously, the auxiliary contact K described in this programme DOn also be provided with the are-tight contact N of elasticity K, at are-tight contact N KThe front post the insulation are-tight plate J N
In addition, all metal arc extinguishing grid pieces G in this programme C, Gh and G IAll be arranged to the combined module type structure.
Compared with prior art, the utlity model has following beneficial effect:
1, owing to adopt electronics, electromagnetic principle, make circuit connection flexible, inner additional acknowledgment copy ratio is easier to, and more easily realizes quality control, the reliability height;
2, arc control device and isolating switch are combined into one, can prevent to draw, close the generation of disconnecting link accident because of on-load; Intelligent apparatus is set prevents that tape jam from closing a floodgate;
3, electronics, electromagnetism two parts arc extinguishing ability can suitably be distributed and given retention capacity, the switch long service life;
4, arc control device expose, and are easy to safeguard;
5, simple in structure, be easy to make and cost low.
Description of drawings
Fig. 1 is the installation shape assumption diagram of the utility model electronic electromagnetic intelligent switch;
Fig. 2 is the circuit theory diagrams of the utility model electronic electromagnetic intelligent switch;
Fig. 3 is the vertical section structural map of the utility model electronic electromagnetic intelligent switch;
Fig. 4 is the cutaway view of I-I among Fig. 3;
Fig. 5 is fixed contact K among Fig. 3 AA kind of structural representation;
Fig. 6 is fixed contact K among Fig. 3 AAnother kind of structural representation;
Fig. 7 is the structural representation of ceramic arc suppressing cover Pc among Fig. 3;
Fig. 8 is the amplification view of A-A among Fig. 7;
Fig. 9 is the amplification view of B-B among Fig. 7;
Figure 10 is auxiliary contact K among Fig. 3 DStructural representation;
Figure 11 is the end view of Figure 10;
Figure 12 is the structural representation of the interior current signal transmitting device of insulator among Fig. 1;
Figure 13 is a smart circuit key wiring diagram among Fig. 1.
1 is arc control device among the figure, K ABe fixed contact, K BBe moving contact, K CBe the striking contact, B is the mains side lead-in wire, and L is the load side lead-in wire, and CT is a current transformer, Y RBe piezo-resistance, D is high back-pressure diode, W 1, W 2, W 3, W 4Be coil, W is the coil general name, and R is a resistance, and F is a protective tube, K N, K W, K D, K LBe auxiliary contact, G C, Gh, G P, G IBe arc extinguishing grid pieces.P CBe ceramic arc suppressing cover, J is an arc spraying mouth, and C is a coil case, P UBe insulating ceramics glaze, Q WBe magnetic bobbin core, Q ABe the movable iron core of fixed contact, N DBe are-tight guiding insulating case, J UBe insulation cushion, Q PBe iron plate ceramic mixture, Q SBe iron sand ceramic mixture, J NBe arc resistance insulation plate, N KBe are-tight contact, R dBe adjustable resistance, D tBe monostable clocked flip-flop, C is an electric capacity, and V is a triode, Q K1, Q K2Be tripping operation auxiliary switch, T WBe breaking coil, L DBe luminous tube.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
Fixed contact K AOn arc control device 1 are housed, arc control device are made up of four sections arc extinguishing districts, fixed contact K AStriking contact K CStretch in first section of the arc control device fixed contact K ABe made up of two parts, the front is that main contact contact back is striking contact K C, striking contact K CMobilizable Q unshakable in one's determination is equipped with in the inboard A, are-tight guiding insulating case N is housed on the iron core D, Q unshakable in one's determination during disconnection AUnder the effect of magnetic force and spring, two mutual adhesives of iron core are and approaching, and air is apart from minimizing, and magnetic force is strengthened, and makes electric arc along striking contact K CBe advanced into striking contact K rapidly CTerminal.Fixed contact K among Fig. 6 ADo not exist together be the lead-in wire around one the circle be connected with it again.So when electric arc arrives auxiliary contact K NAnd K WWith moving contact K BBetween the time, electric arc promptly rapidly elongates and is stopped by arc extinguishing grid pieces and deionization and arc extinguishing.Auxiliary contact K NAnd K WWith moving contact K in the motion BShould keep greater than the static discharge distance, when switch disconnects, mainly rely on magnetic force that arc transfer is arrived auxiliary contact K NAnd K WOn, auxiliary contact K NAnd K WBetween the arc extinguishing district mainly when cutting off little arc current, near and generation effect big current over-zero the time.This section shouldn't when as on-load switch.Auxiliary contact K WAnd K DBetween be the 3rd section arc extinguishing district, auxiliary contact K wAround coil rotation 270 degree.Ceramic arc suppressing cover P is housed on every side C, ceramic arc suppressing cover P CQ unshakable in one's determination is equipped with in both sides W, at its outside unshakable in one's determination and inboard, ceramic arc suppressing cover P CBurn near the both sides the iron plate arc resistance insulation enamel P is arranged UQ unshakable in one's determination in passing coil WPart is because of its cross section minimum of spatial limitation, so adopted the iron core of the high full magnetic flow of high magnetic conduction, iron core makes as Fig. 4 shape outer core and coil inner iron core part magnetic resistance are matched, and does not pass ceramic arc suppressing cover P to reduce CLeakage flux, ceramic arc extinguishing grid pieces G PMake the planform that leading portion grid sheet is wide, spacing long and gradually reduce backward.For distance is reduced and satisfies ceramic arc suppressing cover P as far as possible CThe cooperation of intensity and insulation, ceramic arc suppressing cover P CThe two side is attenuate progressively backward in the past, and the two side leading portion has been filled iron sand and potter's clay mixture Q S, back segment has been filled iron plate and potter's clay mixture Q P, so just effectively reduced distance between iron core, and satisfied arc control device intensity needs, the arc extinguishing magnetic force when having strengthened electric arc zero cross near and little electric current.Ceramic arc suppressing cover P CThe both sides, end of grid sheet have arc spraying mouth J alternately.Main contact K AWith moving contact K BBetween insulation coordination, mainly at coil W 1And strengthen between iron core.Auxiliary contact K DAnd K LBetween be the 4th section arc extinguishing district, and be connected with iron railings sheet G IWith high back-pressure diode D, at auxiliary contact K DAre-tight J posted in the front portion N, and flexible are-tight contact N is housed K, during the switch folding and moving contact K BCONTACT WITH FRICTION, moving contact K BIt is thick slightly to make one section in front, and one section of back is thin slightly, with slow-down in short-term, can not contact when not using intelligent apparatus.Iron railings sheet and moving contact K BKeep enough distances during motion, make electric arc enter the grid sheet and arc extinguishing by magnetic conduction effect unshakable in one's determination during disconnection.Perhaps both sides are equipped with the both sides that permanent magnet draws in iron plate to electric arc and are got a foothold and arc extinguishing.
In Switching Power Supply side supporting insulator, light-emitting diode L is housed D, signal is reached intelligent apparatus in the switching mechanism case, key wiring diagram such as Figure 13 with optical fiber.Variable resistor R dWith the action definite value that adjusts switch.Monostable clocked flip-flop D tTo guarantee the operate time of tripping.
Below switch arc extinguishing and intelligent function process and principle are described in further detail.When switch closure, moving contact K BWith fixed contact K AClosely electricity connects, and makes circuit connect normal operation, and this moment, arc-control device was in the disconnection idle condition, when switch disconnects load current and fault current, and moving contact K BBreak away from fixed contact K earlier AMain contact zone, current transfer is to striking contact K then C, as moving contact K BBreak away from striking contact K CThe time, contact both sides moving core Q AUnder magnetic force suction and spring thrust effect very fast near and magnetic force is strengthened, electric arc upwards is pushed into striking contact K rapidly CEnd is along with moving contact K BMotion is away from making arc transfer to K N, W 1Coil is very fast to make coil produce magnetic force on every side by electric current, at moving contact K BContinuation away from the time, electric arc is transferred to auxiliary contact K rapidly WAnd auxiliary contact K DOn, K WWith K DBetween electric arc mainly at W 1Make electric arc at auxiliary contact K under the magneticaction that produces WGuiding is pushed ahead around the coil down and simultaneously to ceramic arc suppressing cover P CIn advance and the grid sheet top that arrives, in the arc spraying mouth J of both sides, grid sheet top ejection, and electric arc blown out many sections, reduce along with electric arc inwardly advances arc current, corresponding grid sheet width reduces and arc control device two side pottery iron sand Q SAnd ceramic iron plate Q PMake between iron core that distance reduces between non-magnetic material, thereby make magnetic force remain sufficient intensity, and still have big arc extinguishing ability when making arc current zero cross near and little arc current.Simultaneously when electric arc constantly advances elongation, K WWith K DBetween arc voltage also constantly increase, therefore be attempted by K WWith K DBetween coil W 3Also there is electric current to pass through with the resistance R of serial connection, because of coil W 3, the impedance angle between resistance R is less, thereby coil W 3Produce magnetic force and W 1The synthetic help magnetic force that produces of magnetic force has been strengthened the arc extinguishing ability of electric arc zero passage and little arc current, thereby has been made arc current leave fixed contact K AAfter, first half-wave promptly significantly reduces, and second half-wave can extinguish in ceramic arc extinguishing district after the zero passage, and arc current is transferred to coil W 3In the resistance R circuit.As moving contact K BContinue motion and leave auxiliary contact K DThe time, at iron railings sheet G IEffect under electric arc move up to K L, as arc current direction and high back-pressure diode D conducting direction not simultaneously, electric arc can not extinguish, along with moving contact K BContinue to move to diode D conducting when identical with high inverse-voltage tube diode D conducting direction, the 4th section arc extinguishing district arc extinction, arc current enters diode D, as moving contact K BContinuation away from the time arc current backward diode D by, electric arc also promptly extinguishes simultaneously, whole arc extinguishing process is also promptly finished.When diode D damaged, fuse failure in the protective tube F and disconnect electric arc played the backup protection effect.
When switch closure, present all switches can not have been predicted that all fault-free exists and to the fault combined floodgate, cause damages such as causing equipment when overlapping for the second time in switch fault disconnection back especially.For this this switch has been installed intelligent apparatus, structure and principle such as Figure 12, Figure 13.Course of action and principle are as follows:
During switch closure, in making process, the switch trip auxiliary contact is serially connected in the Q of tripping operation outlet triode V collector electrode K2The contact levelling is at K BWith K DConnect in short-term during contact, at moving contact K BMove to greater than with fixed contact K AStatic discharge allows the preceding disconnection of distance, guarantees that switch is in the normal trip(ping) circuit that do not influence in service.So as moving contact K BWith auxiliary contact K DDuring contact, circuit is promptly by W, R, F circuit and power connection in the arc control device, and operating current is by adjustable resistance R dAdjust greater than rated load impedance X LAdd arc control device impedance loop X M, multiply by the current value that COEFFICIENT K determines.Little capacitor C prevents interference maloperation.When there was fault in circuit, electric current was promptly greater than the device action value, CT secondary luminous tube L DLuminously by optical fiber signal is reached intelligent apparatus in the switching mechanism case, the monostable loop D of photosensitive tube trigger action tMake the stable startup outlet of subsequent action tripping operation triode V conducting tripping operation, because of trip(ping) circuit does not have time delay process for high speed, and closing speed is because of moving contact K BInitial contact friction slows down greatly, just guarantees at moving contact K BDo not move to fixed contact K APermission distance before, switch is tripping at once, thereby has prevented that the switch heavy current impact from closing a floodgate on fault, the tripping operation process can be finished in less than two half-waves.As in the meantime, when switch does not reach the tripping operation operating value, because moving contact K BEnter thin part action and accelerate, make switch finish combined floodgate fast.

Claims (7)

1. an electronic electromagnetic intelligent switch comprises isolating switch, it is characterized in that: at the mains side fixed contact K of isolating switch AOn electromagnetic arc blowout device 1 is installed, this device is composed in series by four sections arc extinguishing districts, blowout coil W is contained in first section arc extinguishing district 1With alloy arc extinguishing grid pieces G C, blowout coil W 1A termination auxiliary contact K is arranged N, the other end and fixed contact K AConnect fixed contact K AOn striking contact K is housed cSecond section arc extinguishing district is arranged on auxiliary contact K NWith K WBetween, with coil W 2With alloy arc extinguishing grid pieces G hIn parallel; Above-mentioned two sections arc extinguishing districts are arranged at blowout coil W 1And W 2The below; The 3rd section arc extinguishing district is arranged on auxiliary contact K wWith K DBetween, coiling shell C rotation 270 degree, and with by ceramic arc extinguishing grid pieces G pAnd two sidewalls that are positioned at its upper and lower the ceramic arc suppressing cover Pc, the coil W that form 3, resistance R and protective tube F parallel connection, outside ceramic arc suppressing cover Pc both sides, refilled Q unshakable in one's determination wThe 4th section arc extinguishing district is arranged on auxiliary contact K DWith K LBetween, with irony arc extinguishing grid pieces G IWith high back-pressure diode D parallel connection.
2. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: described mains side fixed contact K AMains side lead-in wire be provided with current transformer CT, the secondary circuit of current transformer CT is by the luminous tube L of supporting insulator inside DWith optical fiber signal is reached intelligent apparatus in the construction of switch case, described intelligent apparatus amplifies timing device by the signal coupling and forms.
3. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: described mains side fixed contact K AStriking contact K cThe inboard is provided with mobilizable Q unshakable in one's determination A
4. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: arc extinguishing grid pieces G in described the 3rd section arc extinguishing district pShape by forward direction after, by widely narrowing down, shortening by long by thick attenuation, spacing, the both sides, top of arc-extinguish chamber Pc have arc spraying mouth J alternately.
5. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: at described coil W 1, W 2, W 3An independently coil W also is set outward separately 4With piezo-resistance Y R
6. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: described auxiliary contact K DOn also be provided with the are-tight contact N of elasticity K, at are-tight contact N KThe front post the insulation are-tight plate J N
7. electronic electromagnetic intelligent switch according to claim 1 is characterized in that: described metal arc extinguishing grid pieces G C, G hAnd G IAll be arranged to the combined module type structure.
CN 200420091732 2004-09-15 2004-09-15 Electronic magnetic intelligent switch Expired - Fee Related CN200983345Y (en)

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Application Number Priority Date Filing Date Title
CN 200420091732 CN200983345Y (en) 2004-09-15 2004-09-15 Electronic magnetic intelligent switch

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Application Number Priority Date Filing Date Title
CN 200420091732 CN200983345Y (en) 2004-09-15 2004-09-15 Electronic magnetic intelligent switch

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CN200983345Y true CN200983345Y (en) 2007-11-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950946A (en) * 2010-09-17 2011-01-19 徐洪 Super-prevention intelligent protector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950946A (en) * 2010-09-17 2011-01-19 徐洪 Super-prevention intelligent protector

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C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee