CN202977312U

CN202977312U - Novel direct-current contactor

Info

Publication number: CN202977312U
Application number: CN 201220699844
Authority: CN
Inventors: 陈巧灵; 刘宏珍; 马彦宏
Original assignee: TIANSHUI HUANGHE ELECTRIC CO Ltd
Current assignee: TIANSHUI HUANGHE ELECTRIC CO Ltd
Priority date: 2012-12-18
Filing date: 2012-12-18
Publication date: 2013-06-05
Anticipated expiration: 2022-12-18

Abstract

The utility model relates to execute devices in direct-current circuits, in particular to a novel direct-current contactor which is compact in structure, reliable in switching on and off and small in size and provided with a main contact capable of realizing arc-less breaking. The novel direct-current contactor comprises a contact device, an electromagnetic device and an arc-control device. The contact device comprises an insulating mounting plate (1), the main contact, an arc contact and two terminal boards (2) separately installed on the insulating mounting plate (1). The electromagnetic device comprises a magnetic yoke (3), an armature iron (4) and a pickup coil (6). The magnetic yoke is fixed on the insulating mounting plate, one end of the armature iron is rotatably connected with the magnetic yoke (3), and the pickup coil with an iron core (5) is connected with the magnetic yoke (3) at the position above a free end of the armature iron (4). An upper support unit (7) and a lower support unit (8) are sequentially fixedly arranged on both ends of the connecting end of the armature iron (4). A moving contact (9) of the main contact is in suspension connection with the upper support unit (7), and a movable arc contact (11) of the arc contact is arranged on the upper support unit (7).

Description

A kind of D. C. contactor

Technical field

The utility model relates to the performer in a kind of DC circuit, is specially a kind of D. C. contactor.

Background technology

Contactor refers to frequently to close the cut-offfing and close locking device of overload current of closing, carrying and cut-offfing normal current and regulation narrowly.Be widely used in the middle of electric power, distribution and power consumption equipment.Contactor broadly refers to utilize in industrial electro the coil current flowing to produce magnetic field, makes contact closure, to reach the electrical equipment of control load.Contactor comprises the contact system of normally open contact or normally closed interlock by the electromagnetic system that comprises iron core, solenoid, and arc-control device forms.On electrotechnics; because contactor can fast shut-off exchanges with the direct current major loop and can connect continually device with large current control circuit; so often apply to motor as control object; also can be used as and control work factory and establish the electrical loads such as the standby ﹑ hot device ﹑ machine-tool of electricity and various kinds electric power unit; circuit can not only be connected and cut off to contactor, but also have the effect of low-voltage release guard.It is large that contactor is controlled capacity, is applicable to frequent operation and far distance controlled, is one of critical elements in automatic control system.In industrial electric, the contactor purposes is quite extensive.

Contactor is divided into A.C. contactor and D.C. contactor by the form of main contacts link circuit; D.C. contactor is mainly used in DC speed regulation, do important performer in the middle of electric power distribution system, to have power with respect to AC system large due to DC speed regulation and electric power system, system stability, the characteristics such as easy maintenance, therefore all be widely used at industry-by-industry, the high power DC that especially is used in electric power system drives in the place, in the electric equipment for industries such as drilling platforms, locomotive, machinery, metallurgy; Also be used for simultaneously remote connection, disjunction DC circuit and startup, stop DC motor.But present existing D.C. contactor capacity can not satisfy actual requirement fully, wants simultaneously just to cause small product size excessive after increase-volume, and reliability reduces, the problems such as arc extinguishing difficulty.

The utility model content

The utility model provides a kind of main contact non-arc breaking disconnected for above-described problems of the prior art, compact conformation, and break-make is reliable, a kind of D. C. contactor that volume is small and exquisite.

A kind of D. C. contactor of the utility model, comprise contact device, be used for controlling the calutron of contact device action, and the arc-control device that is used for contact device is realized arc extinguishing, described contact device comprises insulated mounting plate 1, main contact and arcing contact, and separate two terminal blocks 2 that are arranged on insulated mounting plate 1; It is characterized in that, described calutron comprises the armature 4 that yoke 3, one ends that are fixed on insulated mounting plate 1 and yoke 3 are rotationally connected, and be connected to yoke 3 be positioned at armature 4 free ends tops with unshakable in one's determination 5 pull-in winding 6; The link of armature 4 is fixedly installed holding components 7 and lower holding components 8 up and down successively; Described main contact is the double breaking points bridge contact that comprises moving contact 9 and fixed contact 10, and arcing contact is the single-break contact terminal of finger-type that comprises moving arcing contact 11 and static arc contact 12; Fixed contact 10 is fixedly connected with terminal block 2 respectively, and static arc contact 12 is connected with terminal block 2 away from pull-in winding 6 one sides; Moving contact 9 is suspended on lower holding components 8 by the double-screw bolt 13 that arranges, and the middle part is connected with upper holding components 7 by spring 14; Described upper holding components 7 front ends are bent upwards perk, and the middle part is provided with column 15, and end is fixed with the support subplate 16 that free end makes progress; Moving arcing contact 11 passes column 15 and is placed on holding components 7 front ends and supports on subplate 16, is connected with column 15 upper ends by spring 14.

Further, described yoke 3 tops are provided with auxiliary contact group 17, and yoke 3 is connected with the resetting device 18 hinged with armature 4 link one sides by spring 14.

Further, described static arc contact 12 both sides are respectively arranged with magnetic conductive board 19, and the top is provided with arc-extinguish chamber 20.

Further, described static arc contact 12 belows are provided with blowout coil 21; Blowout coil 21 is in parallel with major loop, and is arranged between magnetic conductive board 19.

Further, described arc-extinguish chamber 20 inside are disposed with arc striking piece 22 and lower arc striking piece 23 along the location notch that central authorities arrange from top to bottom; Upper arc striking piece is fixedly installed the elastic fastening plate 24 that free end outwards sticks up on 22 surfaces, the outside perk of end; The lower arc striking piece 23 outside perks of front end, the rear end is fixedly installed circular-arc striking cramp 25; Be provided with the gap between upper arc striking piece 22 ends and lower arc striking piece 23 front ends, on described gap and arc-extinguish chamber 20, the cavity of corresponding setting forms arc control device 26.

Further, described arc-extinguish chamber 20 bilateral symmetry are provided with the bearing pin 27 that is slidably matched with magnetic conductive board 19, the arc-extinguish chamber upper outside is provided with the guiding plug component 28 of Contraband shape towards yoke 3 horizontal-extendings, two free ends of guiding plug component 28 are fixed with arc-extinguish chamber 20; Be provided with the slot that coordinates with the plug component 28 that leads on yoke 3.

A kind of D. C. contactor of the utility model, the contrast problems of the prior art, it has following beneficial effect.

1) by the link at armature 4, holding components 7 and lower holding components 8 are set and are respectively used to hang moving contact 9 and support moving arcing contact 11, thereby form double-deck composite construction, the moving contact 9 of main contact realizes that suspension type installs; Moving contact 9 is connected with upper holding components 7 by spring 14; moving arcing contact 11 is connected by column 15 upper ends on spring 14 and upper holding components 7; closed after the first closed main contact of arcing contact when having realized adhesive, during disconnection, main contact first disconnects the sequence of movement that disconnects after arcing contact, realizes that the main contact non-arc breaking is disconnected; the purpose of protection main contact; and completed the function of automatically catering to compensation, and guaranteed the reliability that contact connects, design ingenious; novel structure, safe and reliable.

2) the upper arc striking piece 22 and the lower arc striking piece 23 that utilize the interior location notch that arranges along central authorities of arc-extinguish chamber 20 to arrange, form irregular upper arc striking piece 22 ends and lower arc striking piece 23 front ends, and and arc-extinguish chamber 20 on the arc control device 26 that form of the corresponding cavity that arranges, realize multistage irregular arc extinguishing, can be the fastest will disconnect the time arcing contact electric arc elongation, the disjunction that produce, extinguish, coordinate again the blowout coil 21 of static arc contact 12 belows settings to realize magnetic quenching, guarantee arc quenching effect, strengthened simultaneously fail safe and reliable and stable degree when using.

3) adopt the mode of pegging graft to utilize bearing pin 27 that arc-extinguish chamber 20 is connected on magnetic conductive board 19 fast, simple to operation, guiding plug component 28 by the Contraband shape of setting on arc-extinguish chamber 20 is realized accurate guide effect to its installation, can guarantee fixing of the interior upper arc striking piece 22 of arc-extinguish chamber 20 and the relative arcing contact of lower arc striking piece 23 installation site, thereby guarantee the effect of arc extinguishing, can not cause the reduction of arc quenching effect even to be lost because of inspection and maintenance; Adopt simultaneously modular Design and manufacture.When guaranteeing the arc extinguishing space, dwindled to greatest extent volume, realized the continuous current-carrying of large electric current, applicable ability is strong, and functional reliability is high.

Description of drawings

Fig. 1 is the front view of structure described in the utility model example.

Fig. 2 is the left view of structure described in the utility model example.

Fig. 3 is the right view of structure described in the utility model example.

Fig. 4 is the end view of arc-extinguish chamber described in the utility model example.

In figure: insulated mounting plate 1, terminal block 2, yoke 3, armature 4, unshakable in one's determination 5, pull-in winding 6, upper holding components 7, lower holding components 8, moving contact 9, fixed contact 10, moving arcing contact 11, static arc contact 12, double-screw bolt 13, spring 14, column 15, support subplate 16, auxiliary contact group 17, resetting device 18, magnetic conductive board 19, arc-extinguish chamber 20, blowout coil 21, upper arc striking piece 22, lower arc striking piece 23, elastic fastening plate 24, circular-arc striking cramp 25, arc control device 26, bearing pin 27, guiding plug component 28.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described and describes.

A kind of D. C. contactor of the utility model, comprise contact device, be used for controlling the calutron of contact device action, and the arc-control device that is used for contact device is realized arc extinguishing, can use separately, after also can connecting by insulated mounting plate 1, a plurality of being used in combination, as shown in Figure 1, the present embodiment is used in combination as example take two and is described; Described contact device comprises insulated mounting plate 1, main contact and arcing contact, and separate two terminal blocks 2 that are arranged on insulated mounting plate 1; Wherein, as shown in Figures 2 and 3, calutron comprises the armature 4 that yoke 3, one ends that are fixed on insulated mounting plate 1 and yoke 3 are rotationally connected, and be connected to yoke 3 be positioned at armature 4 free ends tops with unshakable in one's determination 5 pull-in winding 6; The link of armature 4 is fixedly installed holding components 7 and lower holding components 8 up and down successively; Described main contact is the double breaking points bridge contact that comprises moving contact 9 and fixed contact 10, and arcing contact is the single-break contact terminal of finger-type that comprises moving arcing contact 11 and static arc contact 12; Fixed contact 10 is fixedly connected with terminal block 2 respectively, and static arc contact 12 is connected with terminal block 2 away from pull-in winding 6 one sides; Moving contact 9 is suspended on lower holding components 8 by the double-screw bolt 13 that arranges, and the middle part is connected with upper holding components 7 by spring 14; Described upper holding components 7 front ends are bent upwards perk, and the middle part is provided with column 15, and end is fixed with the support subplate 16 that free end makes progress; Moving arcing contact 11 passes column 15 and is placed on holding components 7 front ends and supports on subplate 16, is connected with column 15 upper ends by spring 14.After pull-in winding 6 energisings, unshakable in one's determination 5 are magnetized, and attract armature 4 to rotate; Thereby in drive, holding components 7 and lower holding components 8 move downward, because moving contact 9 is suspended on lower holding components 8 by double-screw bolt 13, therefore when lower holding components 8 moves downward suddenly, moving contact 9 also moves downward, moving arcing contact 11 moves downward under the transmission of the spring 14 on upper holding components 7 columns 15 simultaneously, realize closed prior to moving contact 9, then moving contact 9 is when lower holding components 8 continues to move downward and fixed contact 10 adhesives, be communicated with two and separate the terminal block 2 that arranges, moving contact 9 is realized protection; Pass through at last the spring 14 between moving contact 9 and upper holding components 7, and the spring 14 that connects moving arcing contact 11 on column, realize automatically catering to compensation, guaranteed the stable and reliability that main contact is connected with arcing contact.

Wherein, as shown in Fig. 2 and 3, yoke 3 tops are provided with auxiliary contact group 17, yoke 3 is connected with the resetting device 18 hinged with armature 4 link one sides by spring 14, after pull-in winding 6 outages, the spring 14 that arranges on resetting device 18 discharges the potential energy that stores, and resetting device 18 band moving armatures 4 is rotated reset, thereby in drive, holding components 7 and lower holding components 8 move upward, and main contact and arcing contact are realized separating; During motion; due to upper holding components 7 and support subplate 16 to separate with moving arcing contact 11; and moving contact 9 hangs connection with lower holding components 8; therefore at first moving contact 9 directly moves upward under the effect of lower holding components 8; after main contact separates; arcing contact upper holding components 7 with support subplate 16 on push away to separate after realizing under effect and put arc, formation is protected to main contact.

Wherein, as Fig. 1 and Fig. 2 and shown in Figure 3, static arc contact 12 both sides are respectively arranged with magnetic conductive board 19, and the top is provided with arc-extinguish chamber 20; As shown in Figures 2 and 3, static arc contact 12 belows are provided with blowout coil 21; Blowout coil 21 is in parallel with major loop, and is arranged on magnetic conductive board 19 inside, realizes magnetic quenching.

Wherein, as shown in Figure 4, arc-extinguish chamber 20 inside are disposed with arc striking piece 22 and lower arc striking piece 23 along the location notch that central authorities arrange from top to bottom; Upper arc striking piece is fixedly installed the elastic fastening plate 24 that free end outwards sticks up on 22 surfaces, the outside perk in rear end; The lower arc striking piece 23 outside perks of front end, the rear end is fixedly installed circular-arc striking cramp 25; Be provided with the gap between upper arc striking piece 22 ends and lower arc striking piece 23 front ends, on described gap and arc-extinguish chamber 20, the cavity of corresponding setting forms arc control device 26; Thereby in the arc extinguishing process, constantly electric arc is elongated and weaken, realized the irregular arc extinguishing of layered multi-stage, structure is compared arc extinguishing grid pieces and is greatly simplified, and designs ingenious.

Wherein, as Fig. 2 and Fig. 3 and shown in Figure 4, arc-extinguish chamber 20 bilateral symmetry are provided with the bearing pin 27 that is slidably matched with magnetic conductive board 19, realize that arc-extinguish chamber 20 is connected with the quick of magnetic conductive board 19; The arc-extinguish chamber upper outside is provided with the guiding plug component 28 of Contraband shape towards yoke 3 horizontal-extendings, two free ends of guiding plug component 28 are fixed with arc-extinguish chamber 20; Be provided with the slot that coordinates with the plug component 28 that leads on yoke 3, reached accurate guiding, guarantee the fixing of the interior upper arc striking piece 22 of arc-extinguish chamber 20 and the relative arcing contact of lower arc striking piece 23 installation site, thus guarantee the effect of arc extinguishing and assembling fast and convenient.

Claims

1. D. C. contactor, comprise contact device, be used for controlling the calutron of contact device action, and the arc-control device that is used for contact device is realized arc extinguishing, described contact device comprises insulated mounting plate (1), main contact and arcing contact, and separate two terminal blocks (2) that are arranged on insulated mounting plate (1); It is characterized in that, described calutron comprises the yoke (3) that is fixed on insulated mounting plate (1), the armature (4) that one end and yoke (3) are rotationally connected, and be connected to the pull-in winding (6) with (5) unshakable in one's determination that yoke (3) is positioned at armature (4) free end top; The link of armature (4) is fixedly installed holding components (7) and lower holding components (8) up and down successively; Described main contact is the double breaking points bridge contact that comprises moving contact (9) and fixed contact (10), and arcing contact is the single-break contact terminal of finger-type that comprises moving arcing contact (11) and static arc contact (12); Fixed contact (10) is fixedly connected with terminal block (2) respectively, and static arc contact (12) is connected with terminal block (2) away from pull-in winding (6) one sides; Moving contact (9) is suspended on lower holding components (8) by the double-screw bolt (13) that arranges, and the middle part is connected with upper holding components (7) by spring (14); Described upper holding components (7) front end is bent upwards perk, and the middle part is provided with column (15), and end is fixed with the support subplate (16) that free end makes progress; Moving arcing contact (11) passes column (15) and is placed on holding components (7) front end and supports on subplate (16), is connected with column (15) upper end by spring (14).

2. a kind of D. C. contactor as claimed in claim 1, it is characterized in that, described yoke (3) top is provided with auxiliary contact group (17), and yoke (3) is connected with the resetting device (18) hinged with armature (4) link one side by spring (14).

3. a kind of D. C. contactor as claimed in claim 1, is characterized in that, described static arc contact (12) both sides are respectively arranged with magnetic conductive board (19), and the top is provided with arc-extinguish chamber (20).

4. a kind of D. C. contactor as claimed in claim 3, is characterized in that, is provided with blowout coil (21) below described static arc contact (12); Blowout coil (21) is in parallel with major loop, and is arranged between magnetic conductive board (19).

5. a kind of D. C. contactor as claimed in claim 3, is characterized in that, the inner location notch that arranges along central authorities from top to bottom of described arc-extinguish chamber (20) is disposed with arc striking piece (22) and lower arc striking piece (23); Be fixedly installed the elastic fastening plate (24) that free end outwards sticks up on upper arc striking piece (22) surface, the outside perk of end; The outside perk of lower arc striking piece (23) front end, the rear end is fixedly installed circular-arc striking cramp (25); Be provided with the gap between upper arc striking piece (22) end and lower arc striking piece (23) front end, described gap forms arc control device (26) with the cavity of the upper corresponding setting of arc-extinguish chamber (20).

6. as claim 3 or 4 or 5 described a kind of D. C. contactors, it is characterized in that, described arc-extinguish chamber (20) bilateral symmetry is provided with the bearing pin (27) that is slidably matched with magnetic conductive board (19), the arc-extinguish chamber upper outside is provided with the guiding plug component (28) of Contraband shape towards yoke (3) horizontal-extending, two free ends of guiding plug component (28) are fixed with arc-extinguish chamber (20); Be provided with the slot that coordinates with the plug component that leads (28) on yoke (3).