CN2569330Y

CN2569330Y - AC contactor

Info

Publication number: CN2569330Y
Application number: CN 02276232
Authority: CN
Inventors: 袁加瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-26
Filing date: 2002-08-26
Publication date: 2003-08-27
Anticipated expiration: 2012-08-26

Abstract

The utility model discloses an AC contactor, which is mainly composed of a static contact group, an active contact group, a control circuit board, a wire attracting bag and a wire releasing bag. A closed hook is provided with a hook tongue; the bottom of a rocking arm of an armature is provided with a restoring spring by matching, wherein, the rocking arm of an armature is embedded with a moving armature; a hook groove is arranged on the moving armature. When the utility model works in a closed state, the moving armature can be hooked and the wire attracting bag is in a power off state. The wire bags of the AC contactor which is provided by the utility model are switched on only at the moments of opening and closing; electricity does not need switching on during the time of normal operation. The utility model has the advantages of safe operation, no temperature rise, no noise interference and obvious energy saving effect; simultaneously, the utility model has the functions of under voltage automatic protection, over voltage automatic protection and phase-absent automatic protection. The utility model belongs to a green environmental product in an electromechanical control element.

Description

A.C. contactor

Technical field:

The utility model relates to a kind of electromagnetic switch of utilizing electromagnetic attraction to operate, belongs to the Electromechanical Control technical field, specifically a kind of energy-saving safe, noiselessness in service and have under-voltage, overvoltage and the A.C. contactor of phase shortage automatic protection functions.

Technical background:

Along with the Chinese national economy high speed development, the particularly fast development of China's power industry has effectively promoted Electromechanical Control technology applying in numerous industries such as China's industry, agricultural.A.C. contactor is a kind of solenoid-operated switch that utilizes electromagnetic force to operate, it is mainly by one group of fixed contact, one group of moving contact, static gag bit and moving armature that pull-in winding is installed constitute, the electromagnetic attraction that produces when utilizing the pull-in winding energising is inhaled moving armature down, driving one group of moving contact moves down, make one group of moving contact and one group of fixed contact closure, at this moment circuit is connected, when pull-in winding cuts off the power supply, moving contact resets under the effect of spring, one group of moving contact and one group of fixed contact are separated, at this moment circuit disconnects, only need energising of control pull-in winding or outage, just can make the main contact of contactor closed or separately, realize the purpose that the control main circuit is switched on or switched off, because it has simple in structure, advantage such as easy to install, be widely used at present the control circuit of various electrical equipment, just present, in China's industry, agricultural, in numerous industries such as chemical industry metallurgical and electric power system, A.C. contactor is as requisite control element in the electrical apparatus control system, its purposes is very extensive, and its consumption is also very huge.But, also there are some fatal defectives in actual use in existing A.C. contactor, first, because it is to rely on electromagnetic force adhesive moving armature to drive the moving contact closure, normally move in the course of work at main circuit, pull-in winding must keep "on" position always, not only the electric energy of consume valuable in vain, and armature also can send always " drone " noise, seriously disturb operational environment; The second, in the closed course of work, because pull-in winding keeps "on" position always, pull-in winding can produce a large amount of heats, also can produce heat at the inner magnetic eddy current that produces of armature, have in addition temperature rise very high, can burn out electrical equipment when serious, very easily cause security incident; In addition; when under-voltage, overvoltage or phase shortage appearred in electric network source, existing A.C. contactor can not be realized automatic power-off protection, generally needs in addition equipped Protector for electric appliances; increase circuit installation and maintenance workload greatly, also increased the installation and operation cost of existing control circuit.

Summary of the invention:

The utility model is that to propose a kind of energy-saving safe effect on the basis of existing technology obvious, noiselessness in service, and have under-voltage, the environmental type A.C. contactor of overvoltage and phase shortage automatic protection functions, it is equipped with secondary cabinet and cabinet on bedplate, secondary fixed contact group and the secondary moving contact group that is fixedly connected on subtie are installed in secondary cabinet, main fixed contact group is installed in cabinet, be fixedly connected on the active sets of contacts and the control circuit board of pull bar, fixed armature is installed on bedplate, adhesive line bag and release wire bag, the closing hook of doing the hook tongue is articulated in fixed armature by axle, be pressed with spring leaf on the closing hook, the moving armature that matches with fixed armature is flush-mounted in the armature rocking arm by the holder hinged support, bottom at the armature rocking arm is fitted with back-moving spring, do the hook groove that the hook tongue with closing hook matches on the moving armature, being connected in drive link on the armature rocker shaft stretches in the cabinet and is set in the connecting rod hinged with pull bar, the auxiliary driving bar that is fixedly connected on the armature rocking arm stretches in the secondary cabinet and is articulated in subtie, drive link and auxiliary driving bar are fixedly connected on the armature rocking arm and together rotate with the armature rocking arm, when main circuit need be powered, press starting button, the electromagnetic force that the energising of adhesive line bag produces will be flush-mounted in the moving armature of armature rocking arm and inhale down, the armature rocking arm moves in the direction of the clock, the hook tongue of closing hook snaps in the hook groove of doing on the moving armature in the effect of spring leaf, even cut off the power supply at adhesive line bag, lose under the situation of electromagnetic attraction and also can tripping not reset, simultaneously, the auxiliary driving bar that is fixedly connected on the armature rocking arm together rotates with the armature rocking arm, upwards promote to be fixedly connected on the secondary moving contact group and the secondary fixed contact group closure of subtie, connect control circuit board and promptly start under-voltage, overvoltage and open-phase protection work system; The drive link that is connected on the armature rocker shaft together rotates with the armature rocking arm, and pulling downwards is fixedly connected on the active sets of contacts and the closed main circuit of connecting of main fixed contact group of pull bar, and normally closed secondary contact disconnects adhesive line bag dead electricity thereupon simultaneously; At this moment main circuit starts under under-voltage, overvoltage and the open-phase protection work system state in the outage of adhesive line bag, no temperature rise, noiselessness and at control circuit board and realizes normal powered operation, when the needs main circuit cuts off the power supply, press stop button, the electromagnetic force that the energising of release wire bag produces will be inhaled closing hook, the hook tongue of closing hook breaks away from the hook groove on the moving armature, the armature rocking arm resets under the effect of back-moving spring, the armature rocking arm is by counterclockwise rotating, and subtie spurs secondary moving contact group downwards and the disconnection of secondary fixed contact group resets; Pull bar upwards promotes the disconnection of active sets of contacts and main fixed contact group and resets, the main circuit outage.The adhesive line bag of the new A.C. contactor that proposes of this practicality is only just switched in the moment of closure, at the normal work period no power, have safe and reliable to operation, no temperature rise, noiselessness interference, the tangible characteristics of energy-saving effect, belong to the environmental type product in the Electromechanical Control element.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an active sets of contacts serial verb construction schematic diagram in the cabinet;

Fig. 3 is a secondary moving contact group serial verb construction schematic diagram in the secondary cabinet;

Fig. 4 is the control principle figure of the utility model control circuit board.

Embodiment:

The A.C. contactor that the utility model proposed, it is that secondary cabinet 11 and cabinet 3 are installed on bedplate 1, secondary fixed contact group 8 is installed in

secondary cabinet

11,9,10 and be fixedly connected on the secondary moving contact group 28 of

subtie

27,29,30, main fixed contact group 4 is installed in cabinet 3, be fixedly connected on the active sets of contacts 26 and the control circuit board 2 of pull bar 25, top arrangement at cabinet 3 has arc-extinguish chamber 5, fixed armature 20 is installed on bedplate 1, adhesive line bag 14 and release wire bag 15, the closing hook 17 of doing hook tongue 19 is articulated in fixed armature 20 by axle 16, the spring leaf 18 that is fixedly installed in bedplate 1 is close to the top of closing hook 17, the moving armature 7 that matches with fixed armature 20 is flush-mounted in the armature rocking arm 22 by holder 23 hinged supports, be fitted with back-moving spring 13 in the bottom of armature rocking arm 22, do the hook groove 21 that the hook tongue 19 with closing hook 17 matches on the moving armature 7, being connected in drive link 6 in 22 rotating shafts of armature rocking arm stretches in the cabinet 3 and is set in the connecting rod 24 hinged with pull bar 25, the auxiliary driving bar 12 that is fixedly connected on armature rocking arm 22 stretches in the secondary cabinet 11 and is articulated in subtie 27, drive link 6 and auxiliary driving bar 12 are fixedly connected on armature rocking arm 22 and together rotate with armature rocking arm 22, when main circuit need be powered, press starting button QA, power supply A is by normally closed secondary contact J1, adhesive line bag 14 constitutes the loop mutually with B, the electromagnetic force that 14 energisings of adhesive line bag produce will be flush-mounted in the moving armature 7 of armature rocking arm 22 and inhale down, armature rocking arm 22 moves in the direction of the clock, the hook tongue 19 of closing hook 17 snaps in the hook groove of doing on the moving armature 7 21 in the effect of spring leaf 18, even in 14 outages of adhesive line bag, the situation lower armature rocking arm 22 that loses electromagnetic attraction can not reset in tripping yet, simultaneously, the auxiliary driving bar 12 that is fixedly connected on the armature rocking arm 22 together rotates with armature rocking arm 22, upwards promote to be fixedly connected on the secondary moving contact group 28 of

subtie

27,29,30 with secondary

fixed contact group

8,9,10 closures are connected control circuit board 2 and are promptly started under-voltage, overvoltage and open-phase protection work system; Simultaneously, the drive link 6 that is connected in 22 rotating shafts of armature rocking arm together rotates with armature rocking arm 22, pulling downwards is fixedly connected on the active sets of contacts 26 and the main fixed contact group 4 closed main circuits of connecting of pull bar 25, normally closed secondary contact J1 disconnects thereupon simultaneously, adhesive line bag 14 is dead electricity thereupon also, at this moment main circuit is in 14 outages of adhesive line bag, no temperature rise, noiselessness disturbs and has started under-voltage at control circuit board 2, overvoltage and open-phase protection work system state are realized normal powered operation down, though at this moment power supply A and B are by closed secondary fixed

contact

9,10, secondary moving

contact

29,30 and D1-D4 constitute the bridge rectifier loop, through C1 filtering, again through D9 to capacitor C2 charging energy storage, but the control utmost point triggerless signal of telecommunication of controllable silicon RT, release wire bag 15 still is in off-position; When the needs main circuit cuts off the power supply, press stop button TA, voltage on the capacitor C2 triggers the control utmost point of controllable silicon RT through R15, controllable silicon RT conducting, the electromagnetic force that 15 energisings of release wire bag produce will be inhaled closing hook 17, the hook groove 21 that the hook tongue 19 of closing hook 17 breaks away from the moving armature 7, armature rocking arm 22 resets under the elastic force effect of back-moving spring 13, armature rocking arm 22 is by counterclockwise rotating, together by counterclockwise rotating, subtie 12 is the secondary moving contact group 28 of pulling downwards with armature rocking arm 22 for drive link 6 and

auxiliary driving bar

12,29,30 with secondary fixed

contact group

8,9,10 disconnections reset; Pull bar 6 upwards promotes active sets of contacts 26 and resets with main fixed contact group 4 disconnections, makes the main circuit outage.

Control circuit board of the present utility model 2 mainly by IC555 integrated package 31 the 2. pin and four input diode D10-D13 constitute OR circuit; form family of power and influence's circuit respectively by R1, R2, DW1 and R9, R10, DW2; constitute two-way superpressure testing circuit respectively by DW3, R3, R4, G1 and DW4, R11, R12, G2, its circuit protection operation principle specifies as follows:

1. open-phase protection principle: if electric network source A mutually and B appoint a scarce phase time in mutually, adhesive line bag 14 no powers, main circuit can not enter operating state; If the A of power supply mutually with B phase shortage not mutually, when 14 energisings of adhesive line bag, main circuit enters operating state, power supply A and C are by closed secondary fixed

contact

8,9, secondary moving

contact

28,29 and D5-D8 constitute the bridge rectifier loop, when C phase shortage occurs mutually, D5-D8 does not have rectification output, at this moment the b point is a low level, this low level makes the IC555 upset through OR circuit, by IC555 the 3. pin output high level pulse trigger controllable silicon RT through R17, controllable silicon RT conducting, the electromagnetic force that 15 energisings of release wire bag produce is inhaled moving closing hook 17, the hook groove 21 that the hook tongue 19 of closing hook 17 breaks away from the moving armature 7, and back-moving spring 13 is with armature rocking arm 22 jack-up, pull bar 6 upwards promotes initiatively sets of contacts 26 and main fixed contact group 4 disconnections, makes the main circuit outage.

2. under-voltage protection principle: if A.C. contactor electrical network in the closed course of work occurs when under-voltage; corresponding family of power and influence's circuit will be closed; at this moment a names a person for a particular job and low level occurs; OR circuit is opened; by IC555 the 3. pin output high level pulse trigger controllable silicon RT through R17; controllable silicon RT conducting; the electromagnetic force that 15 energisings of release wire bag produce is inhaled moving closing hook 17; the hook groove 21 that the hook tongue 19 of closing hook 17 breaks away from the moving armature 7; back-moving spring 13 is with armature rocking arm 22 jack-up; pull bar 6 upwards promotes initiatively sets of contacts 26 and main fixed contact group 4 disconnections, makes the main circuit outage.

3. overpressure protection principle: if A.C. contactor is when superpressure appears in electrical network in the closed course of work; because family of power and influence's voltage of DW1 and DW2 is constant; through R1; R2 and R9; after the R10 dividing potential drop; a point or b point voltage will raise; Va is through DW3; R3; the R4 dividing potential drop; Vb is through DW4; R11; the R12 dividing potential drop; when voltage rises to the turn-on voltage of G1 or G2; the c utmost point of G1 or G2 will become low level; make the IC555 upset through OR circuit; by IC555 the 3. the high level pulse of pin output trigger controllable silicon RT through R17, controllable silicon RT conducting, the electromagnetic force that 15 energisings of release wire bag produce is inhaled moving closing hook 17; the hook groove 21 that the hook tongue 19 of closing hook 17 breaks away from the moving armature 7; back-moving spring 13 is with armature rocking arm 22 jack-up, and pull bar 6 upwards promotes initiatively sets of contacts 26 and main fixed contact group 4 disconnections, makes the main circuit outage.

4. sudden power protection philosophy: if when A.C. contactor in the closed course of work circuit outage takes place suddenly; a point and b point are all with output low level; because capacitor C2 still is full of electric charge; IC555 is still turning; by IC555 the 3. the high level pulse of pin output trigger controllable silicon RT through R17; controllable silicon RT conducting; the electric charge of capacitor C2 is inhaled moving closing hook 17 through the electromagnetic force of release wire bag 15 discharge generation; the hook groove 21 that the hook tongue 19 of closing hook 17 breaks away from the moving armature 7; back-moving spring 13 is with armature rocking arm 22 jack-up; pull bar 6 upwards promotes initiatively sets of contacts 26 and main fixed contact group 4 disconnections, makes the main circuit outage.

Claims

1. A.C. contactor, it is equipped with secondary cabinet (11) and cabinet (3) on bedplate (1), secondary fixed contact group (8 is installed in secondary cabinet (11), 9,10) and be fixedly connected on the secondary moving contact group (28 of subtie (27), 29,30), main fixed contact group (4) is installed in cabinet (3), be fixedly connected on the active sets of contacts (26) and the control circuit board (2) of pull bar (25), it is characterized in that: fixed armature (20) is installed on bedplate (1), adhesive line bag (14) and release wire bag (15), the closing hook (17) of doing hook tongue (19) is articulated in fixed armature (20) by axle (16), be pressed with spring leaf (18) on the closing hook (17), the moving armature (7) that matches with fixed armature (20) is flush-mounted in the armature rocking arm (22) by holder (23) hinged support, be fitted with back-moving spring (13) in the bottom of armature rocking arm (22), do the hook groove (21) that the hook tongue (19) with closing hook (17) matches on the moving armature (7), be connected in drive link (6) in armature rocking arm (22) rotating shaft and stretch in the cabinet (3) and be set in and the connecting rod (24) that pull bar (25) is hinged, it is interior and be articulated in subtie (27) that the auxiliary driving bar (12) that is fixedly connected on armature rocking arm (22) stretches into secondary cabinet (11).