CN103681124A

CN103681124A - Sealed multi-electrode circuit breaker

Info

Publication number: CN103681124A
Application number: CN201410017646.0A
Authority: CN
Inventors: 杨长河; 刘俊
Original assignee: GUIZHOU ZHENHUA HUALIAN ELECTRONICS CO Ltd
Current assignee: GUIZHOU ZHENHUA HUALIAN ELECTRONICS CO Ltd
Priority date: 2014-01-15
Filing date: 2014-01-15
Publication date: 2014-03-26
Anticipated expiration: 2034-01-15
Also published as: CN103681124B

Abstract

The invention discloses a sealed multi-electrode circuit breaker, belongs to a breaker and aims to provide the breaker which can prevent water and explosion and resist electromagnetic interference, and can implement multi-circuit protection. The breaker consists of a shell, a knob handle and a machine core, wherein the machine core comprises a bracket, a driving mechanism, an executing mechanism, a switching mechanism and a decoupling mechanism; the driving mechanism comprises an electromagnetic coil (22) and an armature (23) which is hinged to the bracket (6); the executing mechanism consists of a shifting block (2), a crank handle (5) and a connecting block (10), the shifting block (2) is hinged to the bracket (6), the crank handle (5) is hinged to the shifting block (2), and the connecting block (10) is hinged to the crank handle (5); the switching mechanism consists of a first binding post (14), a second binding post (17), a movable arm (9) hinged to the connecting block (10), a baffle pin (21), and a torsional spring (36); the decoupling mechanism consists of a locking shaft (37), a shifting rod (24), a locking sheet (8) and a slide pin (34). Error operation caused by current surge can be prevented.

Description

Closed multipole circuit breaker

Technical field

The present invention relates to a kind of circuit breaker, relate in particular to a kind of closed multipole circuit breaker.

Background technology

Circuit breaker is a kind of Protector for electric appliances with overcurrent, short circuit, electric leakage, the multiple protection functions such as under-voltage, overheated.At present, most of circuit breakers not only complex structure, performance reliability are poor, and housing is generally unsealed plastic housing; Be difficult to meet the needs of the specific (special) requirements such as waterproof and dustproof, explosion-proof, anti-electromagnetic interference.In addition, current circuit breaker generally can only be controlled the break-make of a circuit, if will implement protection to a plurality of circuit, conventionally a plurality of circuit breakers need to be combined to associating use; Not only cumbersome, and be difficult to guarantee each circuit breaker synchronization action, therefore easily cause load instantaneous phase shortage.

Summary of the invention

In order to overcome the defect existing in prior art, the present invention aims to provide a kind of have waterproof, explosion-proof and anti-electromagnetic interference, can implement to a plurality of circuit the closed multipole circuit breaker of protection.

To achieve these goals, the present invention is by the following technical solutions: it comprise insulation housing, be fixed on this housing bottom by its airtight base plate, be fixed on the button handle of described case top and the movement that is arranged in housing by bearing pin, described movement comprises support and the driving mechanism being fixed in housing, and is located at and holds actuation mechanism, switching mechanism and tripping mechanism on this support; Described driving mechanism comprises the solenoid that is fixed on base plate, by the 5th bearing pin, is hinged on the armature on support; The described actuation mechanism of holding is by being hinged on shifting block on support by the first bearing pin, by the second bearing pin and the hinged crank of this shifting block, consist of the 6th bearing pin and the hinged contiguous block of crank, and button handle is hinged by trace and shifting block; Described switching mechanism is by being fixed on the first binding post on base plate and the second binding post, by the 4th bearing pin and the hinged swing arm of contiguous block, be fixed on backing pin on support, be fixed on the 4th bearing pin and the torsion spring that swing arm right-hand member is compressed forms through the mounting hole on this swing arm, and swing arm is electrically connected to one end of solenoid, the second binding post is electrically connected to the other end of solenoid; Described tripping mechanism by being located at lock shaft on cranking arm, be fixed on driving lever in this lock shaft, be located on the 3rd bearing pin and with the locking plate of chute, be located on contiguous block and the sliding pin coordinating with described chute forms.

Movement in housing is many groups, between adjacent movement, by the insulating barrier being fixed on base plate, is separated, and the shifting block of each movement is flexibly connected with a button handle by a trace jointly; In solenoid, have time-delay mechanism, this time-delay mechanism by being fixed on sleeve on base plate, be located at moving iron core and spring in this sleeve, the airtight fixed core of socket port formed; There is break-make indication warning switch the below of swing arm, this break-make indication warning switch by being fixed on the first lug plate and the second lug plate on base plate, be fixed on compressing tablet on the second lug plate, be positioned at this compressing tablet below and be fixed on the arcuate bombing leaf that conducting strip, two ends on the second lug plate are separately fixed on compressing tablet and conducting strip and form, the second lug plate is electrically connected to the second binding post; Surface at housing is fixed with metal-back.

Compared with the prior art, the present invention is owing to having adopted technique scheme, on the basis of traditional structure to form movement driving mechanism, hold actuation mechanism, switching mechanism and tripping mechanism and improve, therefore locking is more reliable, threads off and switches all sensitive more rapidly.In addition, owing to having increased time-delay mechanism, therefore can avoid the misoperation because of immediate current surge open circuit, improve the reliability of product; In addition, owing to having increased break-make indication warning switch, therefore when opening circuit, can send alarm signal.Owing to having adopted airtight housing, there is waterproof and dustproof, explosion prevention function; Metal-back can improve anti-electromagnetic interference capability; Owing to being connected with many group movements by a trace, therefore adopt a circuit breaker to implement protection to a plurality of circuit.

accompanying drawing explanation:

Fig. 1 is structural representation of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the rack-mount schematic diagram of armature of the present invention;

Fig. 4 is the schematic diagram that actuation mechanism is connected with swing arm, de-mouth mechanism of holding of the present invention;

Fig. 5 is the schematic diagram that driving mechanism of the present invention is connected with switching mechanism;

Fig. 6 is armature schematic diagram of the present invention;

Fig. 7 is the schematic diagram of cranking arm of the present invention;

Fig. 8 is contiguous block schematic diagram of the present invention;

Fig. 9 is that A in Fig. 4 is to view;

Figure 10 is the released state schematic diagram of lock shaft of the present invention and locking plate;

Figure 11 is time-delay mechanism schematic diagram of the present invention.

In figure: button handle 1, shifting block 2, the first bearing pin 3, the second bearing pin 4, crank 5, support 6, the 3rd bearing pin 7, locking plate 8, swing arm 9, contiguous block 10, the 4th bearing pin 11, compressing tablet 12, conducting strip 13, the first binding post 14, the first lug plate 15, arcuate bombing leaf 16, the second binding post 17, the second lug plate 18, brace 19, sleeve 20, backing pin 21, solenoid 22, armature 23, driving lever 24, housing 25, metal-back 26, the 5th bearing pin 27, trace 28, spring 29, moving iron core 30, insulating barrier 31, base plate 32, fixed core 33, sliding pin 34, the 6th bearing pin 35, torsion spring 36, lock shaft 37, wire 38.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described:

As shown in Fig. 1～11: the housing 25 of insulation is airtight by the base plate 32 that is fixed on its bottom, and the top of this housing is fixed with button handle mount pad, and button handle 1 is located on this button handle mount pad by bearing pin (not indicating in figure); In housing 25, there is movement.This movement comprises support and the driving mechanism being fixed in housing, and is located at and holds actuation mechanism, switching mechanism and tripping mechanism on this support.Described driving mechanism by being fixed on the solenoid 22 on base plate 32, the armature 23 being hinged on support 6 by the 5th bearing pin 27 forms, support 6 is fixed on base plate 32.The described actuation mechanism of holding is by being hinged on shifting block 2 on support 6 by the first bearing pin 3, by the hinged crank 5 of the second bearing pin 4 and this shifting block, consist of the hinged contiguous block 10 of the 6th bearing pin 35 and crank 5, and button handle 1 is hinged by trace 28 and shifting block 2.Described switching mechanism is by stretching into the first binding post 14 in housing 25 and the second binding post 17 through base plate 32, by the hinged swing arm 9 of the 4th bearing pin 11 and contiguous block 10, be fixed on backing pin 21 on support 6, be enclosed within on the 4th bearing pin 11 and two ends are separately fixed at torsion spring 36 formations on contiguous block 10 and swing arm 9 through the mounting hole (not indicating in figure) on this swing arm, swing arm 9 by wire 38 be electrically connected to one end of solenoid 22, the second binding post 17 is electrically connected to the other end of solenoid 22 by brace 19.Described tripping mechanism by being located at the lock shaft 37 of cranking arm on 5, be fixed on driving lever 24 in this lock shaft, be located on the 3rd bearing pin 7 and with the locking plate 8 of chute, be located on contiguous block 10 and the sliding pin 34 coordinating with described chute forms; Locking plate 8 for edge with step, be the cam structure of question mark shape, lock shaft 37 is semicircular structure with the part of locking plate 8 EDGE CONTACT.

In order to realize, a plurality of circuit are implemented to short-circuit protection, the movement in housing 25 is three groups, between adjacent movement, by the insulating barrier 31 being fixed on base plate 32, is separated, and described in each, the shifting block 2 of movement is common is flexibly connected with a button handle 1 by a trace 28.

For fear of because of the misoperation of immediate current surge, in each solenoid 22, be provided with time-delay mechanism; This time-delay mechanism is located at moving iron core 30 and spring 29 in this sleeve, the airtight fixed core 33 of sleeve 20 ports is formed by being fixed on sleeve 20 on base plate 32, and time delay oil is housed in sleeve 20.

While opening circuit, in order to send in time alarm signal, below the swing arm 9 of each movement, be provided with break-make indication warning switch; This break-make indication warning switch by being fixed on the first lug plate 15 and the second lug plate 18 on base plate 32, be fixed on compressing tablet 12 on the second lug plate 18, be positioned at this compressing tablet below and be fixed on the arcuate bombing leaf 16 that conducting strip 13, two ends on the second lug plate 18 are separately fixed on compressing tablet 12 and conducting strip 13 and form, the second lug plate 18 is electrically connected to the second binding post 17.

In order to strengthen the ability of anti-electromagnetic interference, on the surface of housing 25, be fixed with metal-back 26.

Operation principle: when the electric current that flows through circuit breaker is less than rated current, the electromagnetic force of solenoid 22 is less than the elastic force of spring 29, moving iron core 30 remains on the bottom of time delay pipe 20, now solenoid 22 is coreless coil, the electromagnetic force producing is not enough to adhesive armature 23, hold actuation mechanism and keep lock-out state, closing of power circuit breaker operation.

When flowing through the electric current of circuit breaker and be greater than rated current, the electromagnetic force that moving iron core 30 is subject to solenoid 22 slowly increases; When overload current reaches set point, the quick air gap central motion to solenoid 22 of moving iron core 30 meeting, and contact with fixed core 33, now solenoid 21 is for there being core coil, and the electromagnetic force of generation is enough to adhesive armature 23 and it is rotated counterclockwise around the 5th bearing pin 27.So the arc surface of armature 23 lower ends just can drive lock shaft 37 to rotate by driving lever 24; locking plate 8 is realized release; swing arm 9 is around the counterclockwise fast rotary of the 4th axle 11 then separated rapidly with the first binding post 14 under the effect of torsion spring 36, and circuit breaker disconnects and realizes overload protection.When the counterclockwise fast rotary of swing arm 9, then rapid when separated with the first binding post 14, compressing tablet 12 and conducting strip 13 are also upspring rapidly under the effect of arcuate bombing leaf 16, and conducting strip 13 and the first lug plate 15 disengage and realize short-circuit alarming.

When circuit breaker flows through suddenly larger short circuit current (8～12 times are more than rated current), moving iron core 30 can produce larger shake. and as shorter in large current duration (300ms is following), circuit breaker is from being judged to be immediate current surge, and armature plate 23 can adhesive; As large current duration is greater than 300ms, moving iron core 30 move distances are excessive, are certainly judged to be short circuit current, armature plate 23 adhesives, and circuit breaker disconnects and realizes short-circuit protection.

When one group of movement of circuit breaker disconnects because of overload or short circuit, what trace 28 can drive that all the other respectively organize movement holds actuation mechanism, armature 23, tripping mechanism and switching mechanism action, thereby many group movements are synchronously disconnected, and reaches the object that prevents phase shortage.

Claims

1. a closed multipole circuit breaker, comprise insulation housing, be fixed on this housing bottom by its airtight base plate, be fixed on the button handle of described case top and the movement that is arranged in housing by bearing pin, described movement comprises support and the driving mechanism being fixed in housing, and is located at and holds actuation mechanism, switching mechanism and tripping mechanism on this support; It is characterized in that:

Described driving mechanism comprises the solenoid (22) that is fixed on base plate (32), by the 5th bearing pin (27), is hinged on the armature (23) on support (6);

The described actuation mechanism of holding is by being hinged on shifting block (2) on support (6) by the first bearing pin (3), by the hinged crank (5) of the second bearing pin (4) and this shifting block, consist of the hinged contiguous block (10) of the 6th bearing pin (35) and crank (5), and button handle (1) is hinged by trace (28) and shifting block (2);

Described switching mechanism is by being fixed on the first binding post (14) on base plate (32) and the second binding post (17), by the hinged swing arm (9) of the 4th bearing pin (11) and contiguous block (10), be fixed on backing pin (21) on support (6), be fixed on the 4th bearing pin (11) torsion spring (36) upper and that swing arm (9) right-hand member is compressed and form through the mounting hole on this swing arm, and swing arm (9) is electrically connected to one end of solenoid (22), the second binding post (17) is electrically connected to the other end of solenoid (22);

Described tripping mechanism by being located at, crank arm lock shaft (37) on (5), be fixed on driving lever (24) in this lock shaft, be located at the 3rd bearing pin (7) upper and with the locking plate (8) of chute, be located at sliding pin (34) formation that contiguous block (10) is upper and coordinates with described chute.

2. closed multipole circuit breaker according to claim 1, it is characterized in that: the movement in housing (25) is many groups, between adjacent movement, by the insulating barrier (31) being fixed on base plate (32), separated, the shifting block of each movement (2) is flexibly connected with a button handle (1) by a trace (28) jointly.

3. closed multipole circuit breaker according to claim 1 and 2, it is characterized in that: solenoid has time-delay mechanism in (22), this time-delay mechanism by being fixed on sleeve (20) on base plate (32), be located at moving iron core (30) and spring (29) in this sleeve, the airtight fixed core (33) of sleeve (20) port formed.

4. closed multipole circuit breaker according to claim 1 and 2, it is characterized in that: there is break-make indication warning switch the below of swing arm (9), this break-make indication warning switch is by the first lug plate (15) and the second lug plate (18) that are fixed on base plate (32), be fixed on the compressing tablet (12) on the second lug plate (18), be positioned at this compressing tablet below and be fixed on the conducting strip (13) on the second lug plate (18), the arcuate bombing leaf (16) that two ends are separately fixed on compressing tablet (12) and conducting strip (13) forms, the second lug plate (18) is electrically connected to the second binding post (17).

5. closed multipole circuit breaker according to claim 3, it is characterized in that: there is break-make indication warning switch the below of swing arm (9), this break-make indication warning switch is by the first lug plate (15) and the second lug plate (18) that are fixed on base plate (32), be fixed on the compressing tablet (12) on the second lug plate (18), be positioned at this compressing tablet below and be fixed on the conducting strip (13) on the second lug plate (18), the arcuate bombing leaf (16) that two ends are separately fixed on compressing tablet (12) and conducting strip (13) forms, the second lug plate (18) is electrically connected to the second binding post (17).

6. closed multipole circuit breaker according to claim 1 and 2, is characterized in that: on the surface of housing (25), be fixed with metal-back (26).

7. closed multipole circuit breaker according to claim 3, is characterized in that: on the surface of housing (25), be fixed with metal-back (26).

8. closed multipole circuit breaker according to claim 4, is characterized in that: on the surface of housing (25), be fixed with metal-back (26).

9. circuit breaker according to claim 5, is characterized in that: on the surface of housing (25), be fixed with metal-back (26).