CN1078066A

CN1078066A - Non-electric AC contactor

Info

Publication number: CN1078066A
Application number: CN 92103256
Authority: CN
Inventors: 余宗海; 沈海涛
Original assignee: Longyan Fujian Synthetic Ammonia Factory
Current assignee: Longyan Fujian Synthetic Ammonia Factory
Priority date: 1992-04-27
Filing date: 1992-04-27
Publication date: 1993-11-03

Abstract

A kind of non-electric AC contactor is that the additional electric wiring that automatic blocking and dropout mechanical device and this device of control are installed is formed on moving iron core of general CJ10 or CJ12 A.C. contactor and the base plate.Cut off the power supply after making contactor coil moment energising adhesive, utilize mechanical locking device, keep the effective operating state of contactor; Utilize automatic control circuit, guarantee manual shut-down, system blackout, under-voltage, line short, motor overload are effectively protected, and coil was in electroless state when this device can make the A.C. contactor operation.

Description

Non-electric AC contactor

The present invention relates to a kind of A.C. contactor in distribution field, be particularly suitable for the device that A.C. contactor does not have the electricity operation.

As everyone knows, A.C. contactor is the device of control apparatus, motor break-make load, the moving iron core in existing A.C. contactor sucking coil energising back is by adhesive, the closed work of main contact, energising keeps being subjected to electric attracting state in order to keep its coil of operating state to need all the time, the not only a large amount of electric energy of coil consumption, and electromagnet produce electromagnetic noise, and coil heating causes environmental pollution.

China utility model patent CN2054567U discloses the little power consumption A.C. contactor of a kind of noiselessness; this utility model is by twin coil control starting; stop; keep on the go and the stable state that stops by machinery; guarantee the zero voltage protection function by energy storage unit; because the mechanical latching of this utility model uses 2 coils respectively with dropout; 2 diodes are used in electrical control; a voltage-stabiliser tube; a triode; the identification circuit that controllable silicon and resistance capacitance etc. are formed; this technology can only be used for the following small-sized A.C. contactor of 40A; and be not suitable for the above A.C. contactor of CJ10-60A, and power savings is not obvious.

The objective of the invention is to provide a kind of big Capacity AC Contactor of not having the electricity operation, make A.C. contactor become the moment energising from long-term energising operation, thereby it is many fundamentally to solve power consumption, noise is big, the problem that temperature is high.

The object of the present invention is achieved like this; between the moving iron core and support static iron core of A.C. contactor; increase automation locking Baoding device and increase by a cover electromagnetism shunt trip; and under-voltage, short circuit, overload protecting circuit; utilize the kinetic energy of contactor moment energising; use mechanical latching when making the armature adhesive; utilize electromagnetism shunt trip and under-voltage, short circuit, overload protecting circuit; make stop, when decompression, short circuit, overload; can control mechanical locking device threads off; make motor out of service, realized that A.C. contactor does not have the purpose of electricity operation.

The present invention is because of the device that only needs automation locking of increase and automatic control locking to thread off, so structure is simple especially, and A.C. contactor only starting the moment energising, and by mechanical latching Baoding, coil is no longer switched on, when stopping, motor only detaining the instantaneous energising of off-line circle, take off the device coil discharge by the energy storage capacitor make-up during decompression, whole device does not have the electricity operation starting the moment work minimal power consumption of threading off during A.C. contactor work, there are not the coil burnout problem in noiselessness and pyrotoxin.

Concrete structure of the present invention is provided by following examples and accompanying drawing thereof.

Fig. 1 is the embodiment general assembly drawing of the automation locking device of proposition according to the present invention.

Fig. 2 is the across-the-line starting embodiment electrical schematic diagram that the control automation locking device of the proposition according to the present invention is threaded off.

Fig. 3 is the embodiment circuit theory diagrams that are applied in XJO1 series reduced-voltage starting case according to the electrical schematic diagram of Fig. 2.

Describe the details and the working condition of the concrete device that proposes according to the present invention in detail below in conjunction with accompanying drawing.

Referring to accompanying drawing 1, part name is among the figure:

(1) base plate fixing hole, (2) base plate, (3) pivot pin 2, (4) secondary drive link, (5) extension spring, (6) secondary drive link spacer pin, (7) one-level drive link spacer pin, (8) pin 2 is hung in extension spring, (9) extension spring 2, (10) pivot pin 1, (11) one-level drive link, (12) pivot pin 3, (13) buffer spring, (14) adjust screw rod, (15) buffering hook base, (16) buffering hook, (17) buffering hook base fixing hole, (18) magnetictrip armature, (19) magnetictrip coil, (20) terminal screw, (21) magnetictrip standing screw.

(1) of above-mentioned automation locking device-(11) and (18)-(21) utilize base plate (2) to form one, be fixedly connected by bottom plate hole (1) and static iron core bottom bracket, (12)-(17) form the buffering hooking device, be fixedly connected by fixing hole (17) and moving iron core, so just formed one group fix, two hooking devices of one group of activity.

One, starts closed operation principle

When AC contactor coil JLC gets electric adhesive, moving iron core drives the movable part of mechanical locking device and the crusherbull zone hook shape position, garden, (16) crotch top, shape position, garden on one-level drive link (11) crotch top, compressing (16) is to bottom offset, when the crotch of (11) enters in 16 the crotch, (16), make (11) and (16) hook together locking mutually by means of the elastic reset of buffer spring (13).When (11) lock with (16), (11) the secondary drive link (4) of tail end utilizes the bossing in left crotch end, the tail end that blocks (11) makes (11) keep lock-out state, (as long as 11) and (16) locking, A.C. contactor bounce-back this moment moment forces the 1st drive link to pass torque to the 2nd drive link, and the 2nd drive link is forced to move down, but displacement is placed restrictions on by spacer pin (6), finish stable blocking, the main contact closure is connected main circuit.

Two, operation principle out of service

When electromagnetic trip coil (19) when electric, make mobile armature (18) inhale bottom offset, bump secondary drive link (4), (4) be that the garden heart produces displacement by the rotation form with pivot pin (3), make the tail end of the left crotch boss disengagement (11) of (4), because one-level drive link (11) tail end loses support, the bounce of A.C. contactor self makes hook (11) separate with (16) hook, and A.C. contactor resets and realizes the circuitry cuts purpose.Back extension spring (5) is worked with extension spring (9) because A.C. contactor resets, and (11) recover reset condition again with (4), because (11) adopt lever principle with (4), dropout armature only needs minimum moment just can work.

Three, decompression, under-voltage, overload circuit operation principle

Referring to accompanying drawing 2, element names is called among the figure:

DK three-phase knife switch TC trip coil

1RD, 2RD fuse V diode

JLC1 AC contactor main contact ZJ1 miniature intermediate relay normally-closed contact

RJ thermal relay C capacitor

QA starting button D three-phase AC asynchronous motor

JLC AC contactor coil RJ1 thermal relay normally closed contact

ZJ miniature intermediate relay coil TA stop button

When A.C. contactor in when operation; power supply charges to energy storage capacitor C through diode V; because the reverse cut-off characteristics of diode; capacitor C does not have the branch circuit discharge; therefore capacitor C is in floating charge state always; but circuit decompression, under-voltage or overload thermal relay when action protection; intermediate relay ZJ discharges; its normally-closed contact ZJ1 closure; the energy storage capacitor electric charge discharges to trip coil TC by the ZJ1 normally-closed contact; make the work of release armature, drive mechanical locking device and thread off, reach the purpose of protection motor, electrical equipment automatic disconnection under abnormal voltage.

Fig. 3 is the line map after the repacking of a kind of XJO1 series decompression starting case.

Below for the embodiment that the present invention is installed on XJO1 reduced voltage starting case is illustrated in conjunction with Fig. 3.

The mechanical self-locking gear of Fig. 3 and Fig. 1 are general no longer to be repeated.

The element names of accompanying drawing 3 is called:

DK three-phase knife switch V diode

1RD, 2RD fuse TC trip coil

JLC AC contactor coil C capacitor

SJ time relay coil QC1 starting A.C. contactor is often opened

Main contact

RJ thermal relay QC2, QC4 start A.C. contactor

Auxiliary normally opened contact

D three-phase AC asynchronous motor QC3, QC5 start A.C. contactor

Auxiliary normally-closed contact

Relay in the middle of ZOB 3-phase autotransformer ZJ1-1, the ZJ1-2

Device ZJ1 normally opened contact

Relay in the middle of JYB indicator light transformer ZJ1-3, the ZJ1-4

Device ZJ1 normally-closed contact

HD run indicator TA stop button

VD starting indicator light JLC1 AC contactor is often opened main contact

LD power supply indicator JLC2, JLC3 AC contactor are assisted

Help normally opened contact

QA starting button ZJ2-1, ZJ2-2 intermediate relay ZJ 2

Normally-closed contact

QC starting ac contactor coil SJ1 time relay timing closing normally opened contact

ZJ1, ZJ2 auxiliary relay coil

This circuit and Fig. 2 have relatively increased 3-phase autotransformer ZOB, start A.C. contactor QC, indicator light transformer JYB, power supply indicator LD starts indicator light UD, run indicator HD, time relay sj and increased an intermediate relay ZJ 2, and whole line map all changes to some extent.

The various functions of this embodiment are achieved in that

One, starting and operation:

The three-phase knife switch DK that closes connects three-phase alternating-current supply, and the 380V AC power is connected indicator light transformer JYB through fuse 1RD, 2RD, and power supply indicator LD is bright, for the starting of motor D is got ready.

Press starting button QA, starting A.C. contactor QC coil gets electric, and the auxiliary normally opened contact QC2 closure of at this moment starting A.C. contactor has realized the QC self-insurance, has also connected the coil of time relay sj simultaneously.Auxiliary normally-closed contact QC3 opens, and reaches the purpose of avoiding misoperation with AC contactor JLC interlocking.Auxiliary normally opened contact QC4 connects, and UD is bright for the starting indicator light, and auxiliary normally-closed contact QC5 opens, and power supply indicator goes out.Meanwhile five couple of QC often opens main contact QC1 closure, connects the reduction voltage circuit of main power source, and motor D starts after 3-phase autotransformer ZOB step-down.

Through time-delay (it is good that SJ presses the required time setting of motor starting in advance) after a while, the time-delay normally opened contact SJ1 closure of time relay sj has been connected intermediate relay ZJ 1 coil, its normally opened contact ZJ1-1 closure, and intermediate relay ZJ 1 realizes self-locking.Normally opened contact ZJ1-2 closure has simultaneously been connected the JLC loop of AC contactor, and meanwhile the normally-closed contact ZJ1-3 of ZJ1 opens, cut off the QC wire loop, the QC dead electricity discharges, and self-insurance is removed, time relay sj also dead electricity returns, and motor D finishes reduced voltage starting.The auxiliary normally closed contact QC3 of QC is at this moment closed, and AC contactor JLC gets electric adhesive, and its three couple often opens main contact JLC1 closure, and motor D changes normal operation over to from starting.JLC adhesive and mechanical latching, its auxiliary normally opened contact JLC2 closure, intermediate relay ZJ 2 gets electric adhesive, and its normally-closed contact ZJ2-1, ZJ2-2 open, and have cut off ZJ1 coil and JLC wire loop simultaneously, thereby have guaranteed the nothing electricity operation of JLC.At this moment QC, SJ, ZJ1 all return to initial state, are motor D prime next time.The auxiliary normally opened contact JLC3 closure of JLC, run indicator HD is bright, and power supply indicator LD returns because of ZJ1-4, QC5, and is at this moment also bright.

Two, shutdown operation:

Press stop button TA, exchange the 380V power supply and directly connect magnetictrip coil TC, 18 adhesives of release armature, drive the mechanical locking device dropout, JLC discharges, and cuts off main power source, and motor D shuts down.

Three, various protections no longer repeat with Fig. 2 situation is similar.

In sum, the present invention adopts the automation locking and controls the locking trip gear automatically, under the condition that ensures the A.C. contactor operate as normal effectively, can realize not having the purpose of electricity operation, and structure is simple especially, has energy-conservationly, does not have the advantage of electric and magnetic oscillation noise and heating.

Claims

1, a kind of nothing electricity operation noiseless A.C. contactor, it is the switching device that is switched on or switched off power supply, it is to utilize electromagnetic force that the main contacts closure is made the motor energized after the contactor coil energising, in the main contacts closure, keep the adhesive operating state with the automation locking, with automatic release device mechanical latching is threaded off, it is characterized in that can guarantee by one group that one-level drive link (11) colludes mutually with buffering hook (16) closes, with the secondary drive link (4) that one-level drive link (11) is threaded off, magnetictrip armature (18), automation locking and trip gear that magnetictrip coil (19) TC and other accessory are formed, and the automatic coil TC that threads off of control mechanical latching, capacitor C, diode V, intermediate relay ZJ, stop button TA, AC contactor JLC, start button QA, the electrical control gear that thermal relay RJ forms.

2, non-electric AC contactor according to claim 1 is characterized in that the one-level drive link (11) of automation locking, trip gear, has the shape that band colludes, and can effectively lock with buffering hook (16) and thread off.

3, non-electric AC contactor according to claim 1, the afterbody that it is characterized in that one-level drive link (11) has a secondary drive link (4), and this secondary drive link (4) can be controlled one-level drive link (11) and the locking or the dropout that cushion hook (16).

4, non-electric AC contactor according to claim 1 is characterized in that the action of secondary drive link (4), can be subjected to magnetictrip armature (18) and trip coil (19) whether to get electric control.

5, non-electric AC contactor according to claim 1, it is characterized in that one-level drive link (11), secondary drive link (4), release armature (18), trip coil (19), utilize pivot pin (3), (10), shotpin (6), (7), extension spring (5), (9), tension spring pin accessories such as (8) is installed on the base plate (2), form an integral body, and utilize base plate fixing hole (1) and A.C. contactor mount holder to be fixed together.

6, non-electric AC contactor according to claim 1 is characterized in that buffering hook (16), has the shape that band colludes and can effectively lock with one-level drive link (11) and thread off.

7, nothing electricity according to claim 1 operation exchanges and presses tentaculum, it is characterized in that buffering hook (16), by locking with one-level drive link (11) after buffer spring (13) resilience.

8, non-electric AC contactor according to claim 1, it is characterized in that buffering hook (16), buffer spring (13), utilize pivot pin (12) and buffering hook base (15) to be mounted to an integral body, and be equipped with (15) and adjust screw (14), (14) can adjust the position of buffering hook; Buffering hook base fixing hole (17) is used for fixing with the moving iron core of A.C. contactor.

9, non-electric AC contactor according to claim 1 is characterized in that the electric current of trip coil (18), by energy storage capacitor C discharge or press stop button and obtain, threads off to guarantee trip gear.

10, non-electric AC contactor according to claim 1 is characterized in that energy-storage capacitor C, and its charging current is to supply with after the power supply process diode V rectification; Discharging current can only be through trip coil TC and the discharge of auxiliary relay normally-closed contact loop.