CN201681777U - Moulded case circuit breaker tripping device - Google Patents

Abstract

The utility model relates to a moulded case circuit breaker tripping device which is an improved to the tripping device of a traditional moulded case circuit breaker and the improvement to the use method and the installation position of the tripping device, and belongs to the technical field of low-voltage electric appliances. The moulded case circuit breaker tripping device is provided with a solenoid and an iron core; the solenoid is wound with a plurality of a ring enameled wire and is led out by two leads; a spring is arranged in the solenoid; the iron core is in a step shape; the lower half part of the iron core is arranged in the spring; the solenoid is fixed between an upper support and a lower support; an upper liner and a lower liner are respectively arranged between the iron core and the upper support and between the iron core and the lower support; the iron core is 5.5 to 6mm higher than the upper liner; the iron core, the upper liner, the lower liner, the upper support and the lower support are on the same axis, are respectively provided with holes and are provided with screw mandrels from up to down; the lower liner is arranged in the solenoid; and the upper liner is 3.5mm higher than the upper support. The moulded case circuit breaker tripping device is integral, is promoted in a modularized way, and improves the operation stability of the circuit breaker and the like.

Description

Tripping device of molded case circuit breaker

Technical field:

The utility model relates to a kind of tripping device of molded case circuit breaker, is the improvement to the release of existing breaker of plastic casing, also is simultaneously the using method and the installation site of release are improved, and belongs to the low voltage electrical apparatus technology field.

Background technology:

Breaker of plastic casing is a protective device important in the low-voltage distribution system; in low-voltage distribution system, play connection, disjunction running current; and when circuit breaks down, play the effect of disengagement failure electric current apace automatically, generally comprise compositions such as contact arc-extinguishing system, operating mechanism, controller, manual tripping device and release.

The effect of release is to convert electrical energy into mechanical action, makes the breaker of plastic casing separating brake when receiving the controller trip signal.Traditional release is divided into electronic trip unit and leakage tripping device etc., is generally the inner installation of circuit breaker, cooperates the draw bar of breaker of plastic casing to realize the action of threading off.

The basic structure of the release assembly of electric leakage breaker of plastic casing commonly used and manual tripping device as shown in Figure 1 at present.Leakage tripping device is made up of line bag, iron core, spring, pull bar, support.The inner magnetic field that produces of line bag when the line bag passes through alternating current, iron core overcomes spring force pulling pull bar, and the draw bar of the operating mechanism of pull bar pulling circuit breaker makes breaker open operation.The effect of manual tripping device is to realize hand tripping, directly promotes the rotation of circuit breaker draw bar downwards by the moving trip push button of hand over hand, makes breaker open operation.The basic structure of manual tripping device is made up of trip push button, push rod, spring among Fig. 1.

Another kind of commonly used electric leakage breaker of plastic casing release assembly and the basic structure of manual tripping device as shown in Figure 2, its basic structure and operation principle are same basic identical with structure shown in Figure 1.

Fig. 3 is the basic block diagram of a kind of typical electronic release assembly and manual tripping device.Electronic trip unit is made up of line bag, magnet, iron core, spring, push rod, support.During breaker closing, circuit breaker promotes the push rod of release, the release storage power, when the controller of circuit breaker sends control signal, make the line bag through a DC, the inner moment generation of the line bag magnetic field force opposite with Porcelain Jar, release discharges energy stored, promote the draw bar of circuit breaker operation mechanism, make breaker open operation; The manual tripping device principle is with the manual tripping device of residual current circuit breaker.

Existing electronic trip unit and manual tripping device are two parts independent of each other, and these two parts are mounted respectively the diverse location at circuit breaker.In the process of breaker of plastic casing being carried out the expansion of intellectualized reconstruction and function, problems such as parts are many, installation complexity have been run into when adopting existing scheme.This structure arrangement tends to the volume ratio of pursuing circuit breaker is brought obstacle and influenced integrated, modular realization; In addition, the electromagnetic field that produces under the heat that produces in running of circuit breaker and the big current conditions may influence the tripping function of circuit breaker; Also have,, therefore can increase the loaded down with trivial details of assembling work and the raising that influences efficiency of assembling owing to need assemble respectively to two parts.

Summary of the invention:

In order to solve the deficiencies in the prior art, the utility model provides a kind of tripping device of molded case circuit breaker.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of tripping device of molded case circuit breaker, be provided with the line bag, iron core, described line is wrapped and is wound with some circle enamelled wires and is drawn by two leads, described line bag inside is provided with spring, described iron core is a stairstepping, the latter half of described iron core is arranged in the spring, described line bag is fixed between upper bracket and the lower carriage, be respectively equipped with liner and lower liner between described iron core and upper bracket and the lower carriage, described iron core is than the high 5.5-6mm of last liner, described iron core, last liner, lower liner, upper bracket and lower carriage are respectively equipped with the hole and are provided with a screw mandrel from top to bottom on same axis, described lower liner places line bag inside, and the described liner of going up exceeds upper bracket 3.5mm.

For the ease of reaching optimum efficiency in use, further: described screw mandrel upper end is provided with an adjusting nut.

For the ease of the reliable separating brake of circuit breaker, further: described lower carriage below is provided with a push rod, and described push rod links to each other with the screw mandrel bottom.

For at the position of action point on leading screw and the circuit breaker draw bar on same straight line, circuit breaker panel hand tripping button, leading screw can make the reliable separating brake of circuit breaker equally not on same straight line the time, further: described screw mandrel top is fixed with a liner by nut.

The utility model has been avoided in the prior art electronic trip unit, and the device of manually slipping out of the hand designs and be installed on the loaded down with trivial details phenomenon of diverse location respectively, progressively advances to integrated, modularization thereby help circuit breaker; The utility model release is installed on the inter panel of circuit breaker, the damage that electric arc causes release when having avoided circuit-breaker switching on-off, improved the stability of circuit breaker operation, the dropout stroke and the natural length scalable that also have release, this installation and regulative mode are suitable for the electronic type molded case circuit breaker and the Thermomagnetic type breaker of plastic casing of various models and specification.

Description of drawings:

Fig. 1 is the basic block diagram of a kind of typical leakage tripping device assembly and manual tripping device.

Fig. 2 is the basic block diagram of another kind of typical leakage tripping device assembly and manual tripping device.

Fig. 3 is the basic block diagram of a kind of typical electronic release assembly and manual tripping device

Fig. 4 is a structure chart of the present utility model.

Fig. 5 is an application example figure of the present utility model.

Fig. 6 is an Another application instance graph of the present utility model.

Fig. 7 is installed in the overall structure figure of circuit breaker for the present invention.

Among the figure: 1, line bag; 2, iron core; 3 springs, 4, lead; 5, upper bracket; 6, lower carriage; 7, go up liner; 8, lower liner; 9, screw mandrel; 10, adjusting nut; 11, push rod; 12, nut; 13, liner; 14, hand tripping button; 15, draw bar; 16, circuit breaker; 17, upper cover plate; 18, lower cover; 19, inter panel.

Embodiment:

Below in conjunction with drawings and Examples the utility model is further specified.

In conjunction with shown in Figure 4, also draw around some circle enamelled wires on the at first online bag 1 with two leads 4, lower liner 8 is installed on the lower carriage 6, last liner 7 installs on the upper bracket 5, and expose 3.5mm, leading screw 9 precession iron cores 2 are until exposing required leading screw length, described iron core 2 is a stairstepping, the latter half of iron core 2 places in the spring 3 in the line bag 1, then with iron core 2 and line bag 1 whole being separately fixed at up and down on upper bracket 5 and the lower carriage 6, thereby last liner 7 makes and is mounted on the iron core 2, described iron core 2 is than the high 5.5-6mm of last liner, and because iron core 2, last liner 7, lower liner 8, upper bracket 5 and lower carriage 6 are provided with the hole on same axis, so final leading screw 9 is on integral body, can make leading screw 9 expose indefinite length with work requirements, then the utility model is installed on the inter panel 17 of circuit breaker 16, when 1 energising of line bag, produce magnetic field force, iron core 2 overcomes spring 3 and moves downward, and screw mandrel 9 pushes away the draw bar 15 of circuit breaker 16, makes the operating mechanism release of circuit breaker 16, circuit breaker 16 tripping operations, also can push away the draw bar 15 of circuit breaker 16, make circuit breaker 16 tripping operations equally by hand tripping button 14.Circuit breaker 16 is divided into upper cover plate 17, lower cover 18 and inter panel 19, its inside is provided with hand tripping button 14, draw bar 15 etc., tripping device of molded case circuit breaker is installed in circuit breaker 16 inside, and hand tripping button 14 is just in time supporting the screw mandrel 9 of tripping device of molded case circuit breaker, sees Fig. 7.

Because circuit breaker model, diversified in specifications, hand tripping button 14, leading screw 9, the position of action point on the draw bar 15 are not necessarily on same straight line.Now suppose hand tripping button 14, leading screw 9 is on same straight line, leading screw 9, draw bar 15 position of action point are not on same straight line, see Fig. 5, it is provided with a push rod 11 in lower carriage 6 bottoms on the basis of Fig. 4, and, described push rod 11 is connected with screw mandrel 9, by push rod 11 make on leading screw 9 and the draw bar 15 position of action point point-blank, no matter be that the trip signal that the controller of circuit breaker 16 sends is threaded off circuit breaker 16, still, all can make circuit breaker 16 reliable separating brakes by hand tripping button 14.Also having a kind of situation is that position of action point on leading screw 9 and the draw bar 15 is on same straight line, hand tripping button 14, leading screw 9 is not on same straight line, see Fig. 6, it is on the basis of Fig. 4, by nut 12 fixed-bearings 13, its objective is to make circuit breaker 16 hand tripping buttons 14 on the prolongation screw mandrel 9 above the adjusting nut 10, leading screw 9 is on same straight line, and the effect that is reached also is to allow circuit breaker 15 reliable separating brakes.

Because circuit breaker 16 is highly different, hand tripping button 14, leading screw 9, even the position of action point on the draw bar 16 is on same straight line, push rod 11 and circuit breaker draw bar cooperate bad, and circuit breaker is separating brake reliably, and an adjusting nut 10 can be set in the upper end of screw mandrel 9, regulate the stroke of tripping device of molded case circuit breaker by regulating adjusting nut 10 on the leading screw 9, make circuit breaker 16 reliable separating brakes.

It is emphasized that: above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims (4)

1. tripping device of molded case circuit breaker, be provided with line bag (1), iron core (2), it is characterized in that: be wound with some circle enamelled wires on the described line bag (1) and draw by two leads (4), described line bag (1) inside is provided with spring (3), described iron core (2) is a stairstepping, the latter half of described iron core (2) is arranged in the spring (3), described line bag (1) is fixed between upper bracket (5) and the lower carriage (6), be respectively equipped with liner (7) and lower liner (8) between described iron core (2) and upper bracket (5) and the lower carriage (6), described iron core (2) is than the high 5.5-6mm of last liner (7), described iron core (2), last liner (7), lower liner (8), upper bracket (5) and lower carriage (6) are respectively equipped with the hole and are provided with a screw mandrel (9) from top to bottom on same axis, described lower liner (8) places line bag (1) inside, and the described liner (7) of going up exceeds upper bracket (5) 3.5mm.

2. tripping device of molded case circuit breaker according to claim 1 is characterized in that: described screw mandrel (9) upper end is provided with an adjusting nut (10).

3. tripping device of molded case circuit breaker according to claim 1 is characterized in that: described lower carriage (6) below is provided with a push rod (11), and described push rod (11) links to each other with screw mandrel (9) bottom.

4. tripping device of molded case circuit breaker according to claim 1 is characterized in that: described screw mandrel (9) top is fixed with a liner (13) by nut (12).

Images