CN2198664Y

CN2198664Y - Plastic break with neutral line

Info

Publication number: CN2198664Y
Application number: CN 94220334
Authority: CN
Inventors: 郑继坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-16
Filing date: 1994-08-16
Publication date: 1995-05-24
Anticipated expiration: 2004-08-16

Abstract

The utility model relates to a plastic breaker with a neutral wire, which comprises a phase wire returning circuit composed of a phase wire clipping seat, an inputting board, an outputting board, static contacts, movable contacts, a starting weld board, a starting weld chamber, a conducting strip, a coil and metal strips, etc., a neutral wire returning circuit composed of a neutral wire clipping seat, an inputting board, an outputting board, static contacts, movable contacts and a starting weld board, etc., and an operating mechanism composed of a handle, a cam, a connecting rod, a sector-shaped operating component, a bar shape capturing component, long and short movable contacting rods, various springs, etc. for operating the switching of the movable and the static contacts of the two returning circuits, wherein, the phase wire returning circuit and the neutral wire returning circuit are designed in the same casing body, and thus the breaker has the advantages of small volume and easy use and with the functions of simultaneously switching on, breaking, overloading and short-circuit protection of a phase wire and a neutral wire.

Description

Plastic break with neutral line

The utility model relates to the circuit breaker that overload and short-circuit protection are used.

Circuit breaker is widely used in the terminal power consumption equipment is carried out distribution; control and protection; be a kind of electric equipment products very widely; it has changed the magnetic gate knife switch of the sort of backwardness China's fifties and the situation of the huge fire damage that often do not cause with the fuse box of insurance; but domestic used circuit breaker all is an one pole at present; only be with the phase line loop; in order to satisfy bipolar needs; often with two circuit breakers usefulness that is together in parallel; certainly will increase volume like this; increase cost, for metal picture aircraft; boats and ships; the power terminal of the less occasion in train or the like position partly is little suitable.The circuit breaker used of private residence, office building, plant area and for example, generally all adorn a circuit breaker that cuts off phase line (being live wire), and center line (being ground wire) all is a common line, if control 30 the road to 60 the tunnel, every circuit breaker electricity consumption is when 10A, 30 the tunnel is 300A, and 60 the tunnel is 600A, and center line has only one the tunnel, its line footpath must be very thick, the butt joint center line brings very big difficulty, and a bit not solid welding is arranged slightly, and will cause generates heat blows, causing whole building, building to stop working does not work, and phase line is still connected, and makes in the building all electrical equipment all be with live wire, and people are brought very big danger.

The purpose of this utility model is to overcome the defective of prior art and a kind of shell band center line circuit breaker of moulding that a kind of volume is little, easy to use, have the connection simultaneously of phase line, center line, disjunction, overload, short-circuit protection function is provided.

The utility model is achieved by the following scheme: comprise upper shell, middle shell, lower house, both sides are respectively equipped with line loop mutually between upper shell and the middle shell, phase line tension seat, tablet, output board are arranged, be welded with fixed contact and run-on tab on the tablet of right side, run-on tab stretches to arc ignition room; Left side bearing, conducting strip, output board are welded to each other; The iron-core coil two ends are connected with moving contact with sheet metal respectively by the copper pigtail line, form the phase line loop circuit.And the operating mechanism of handling dynamic and static contact break-make in this loop, comprise the handle that is hinged in the lower house, connecting rod connects handle and cam, form the flexible connection of mutual interlock, the cam top is provided with and is hinged on the fan-shaped catch members of being stirred by connecting rod on the lower house, it is provided with the escapement spring with the bar type escapement bar that is hinged on the lower house, cam top also be provided be connected with moving contact be subjected to cam-actuated short movable feeler lever and movable feeler lever spring, cam spring is inlaid in the enclosure slot and acts on the cam.

The cam below also is provided with the same centre of gyration of short movable feeler lever and is subjected to cam-actuated long movable feeler lever equally, be provided with neutral return between middle shell and the lower house, comprise, the center line tension seat of right side upper and lower dislocation contour, center line tablet, center line output board with phase line tension seat left side, be welded with fixed contact on the center line output board equally, run-on tab and the welding of center line tablet, moving contact is connected with the center line output board by copper valve line, forms the neutral return circuit.

The utility model since with phase line loop circuit, neutral return circuit design in same housing, so volume is little, easy to use, have the connection simultaneously of phase line, center line, disjunction, overload, short-circuit protection function.

Description of drawings.

Fig. 1 is the utility model structural representation (removing upper shell).

Fig. 2 removes neutral return circuit structure diagram behind middle shell and the above constitutional detail of middle shell for the utility model.

Fig. 3 is that the A of Fig. 1, Fig. 2 is to view.

Describe in further detail by above-mentioned accompanying drawing embodiment.

Mould shell band center line circuit breaker (referring to Fig. 1-3) with plastic production upper shell (30), middle shell (16), lower house (2), be provided with phase line loop circuit, neutral return circuit in the housing and handle the operating mechanism of two connecting and disconnecting of the circuit, the assembling back upper, middle and lower housing that finishes is pegged graft mutually after hotly join the connection one, forms non-disconnectable connection.

Be provided with the phase line loop circuit between upper shell (30) and the middle shell (16), it comprises phase line tension seat (15), tablet (14), the output board (23) that both sides are provided with respectively, be welded with fixed contact (13) and run-on tab (17) on the right side tablet (15), run-on tab is circular-arc extension, stretches to arc control device (18).Left side bearing (21), conducting strip (24), output board (23) welding one, iron core (11), coil (19) two ends are connected to form the phase line loop circuit with sheet metal (1) and moving contact (12) respectively by the copper pigtail line.Be provided with an adjustment screw (22) that acts on the bearing (21) in this loop, the adjusting current range is 5A-32A.

The break-make of phase line loop circuit is controlled moving contact (12) by operating mechanism and is reached with whether contacting of fixed contact (13).

Described operating mechanism is arranged between upper and lower casing (30), (2), comprise with bearing pin and be hinged on handle (4) on the lower house, U type connecting rod (5) is plugged on respectively on handle (4) and the cam (8), stirring by connecting rod (5) of handle (4) drives cam (8) rotation, form the flexible connection of mutual interlock, cam (8) is hinged on the lower house (2) equally.Cam (8) top is provided with and is hinged on the fan-shaped catch members (20) that lower house (2) is upward stirred by connecting rod (5), and it is provided with escapement spring (6) with the bar type escapement bar (3) that is hinged on the lower house (2), makes the usefulness that resets of fan-shaped catch members.Cam (8) top also be provided with the short movable feeler lever (9) that is connected one with moving contact (12) die casting and on movable feeler lever spring (10), this weak point movable feeler lever is subjected to cam drive and moves, movable feeler lever spring (10) resets, and cam spring (7) is inlaid in and acts in the enclosure slot on the cam (8) as the cam usefulness that resets.

Cam (8) below also is provided with the same centre of gyration of short movable feeler lever and is subjected to cam-actuated long movable feeler lever (25) equally, is the contact break-make in the control neutral return circuit.

Be provided with the neutral return circuit between middle shell (16) and the lower house (2), comprise with phase line tension seat (15) left side contour, on the right side, the center line tension seat (27) of following dislocation, center line tablet (26), center line output board (29), be welded with fixed contact (13) on the center line tablet (26) equally, run-on tab (28) and center line tablet (26) welding, moving contact (12) on the long movable feeler lever (25) is by copper pigtail line and center line output board (29) welding, moving contact (12) on the long movable feeler lever (25) forms the neutral return circuit by copper pigtail line and center line output board (29) welding.

Dynamic structure is as follows:

Stirring this circuit breaker handle (4) promotes to connecting direction, connecting rod (5) actuating cam (8) is made rotational angle counterclockwise, compress cam spring (7), after connecting rod promotes to reach certain angle, push fan-shaped catch members (20) open, under tiny escapement spring (6) effect, do not make its up take-off, owing to being rotated counterclockwise of cam, the moving contact (12) that drives on the short movable feeler lever (9) leans on upper static contact (13), and circuit is connected and self-locking.

When load surpasses the value of risk of rated current, owing to the hindrance function of circuit breaker interior metal sheet (1) and self heat thereof produce the bending that causes, catch bar type escapement bar (3) is thrown off fan type catch members (20), cam (8) clockwise rotates under the effect of cam spring (7), and drive moving contact (12) breaks away from fixed contact (13) and cuts off the electricity supply.

The coil of this circuit breaker (19) adopts higher resistance alloy filament winding system; voltage is guided the coil two ends into when short circuit; portion produces heavy current in coil; make iron core (11) produce the highfield; inhale moving iron core trip rod type escapement bar (3) and throw off fan type catch members (20); same cam (8) clockwise rotates under the effect of cam spring (7), drives moving contact (12) and breaks away from fixed contact (13) and cut off the electricity supply and reach short-circuit protection.

When moving contact (12) is cut off the electricity supply with fixed contact (13) moment disengagement, produce the hard arc spark, guide arc control device (18) smoothly into for making electric arc, run-on tab (17) extension is designed to arcuation and stretches to arc control device (18) produce the extinguishing arc effect.

In order to consider the life problems of circuit breaker, when tripping, the design at first cuts off the phase line alive circuit, and then cut off not alive circuit of center line, both time differences were less than 0.05 second, by the right phase line, middle wireplint seat (15), (27) upper and lower dislocation design, make fixed contact (13) and the fixed contact (13) on the neutral circuit on the phase alignment circuit form difference in height, reach the purpose of above-mentioned time difference.

Claims

1, a kind of shell band center line circuit breaker of moulding, comprise upper shell (30), middle shell (16), lower house (2), both sides are respectively equipped with phase line tension seat (15), tablet (14), output board (23) between upper shell (30) and the middle shell (16), be welded with fixed contact (13) and run-on tab (17) on the tablet of right side, run-on tab stretches to arc ignition room (18); Left side bearing (21), conducting strip (24), output board (23) are welded to each other, iron core (11), coil (19) two ends are connected with moving contact (12) with sheet metal (1) respectively by copper valve line, form the phase line loop circuit, and the operating mechanism of dynamic and static contact (12), (13) break-make in this circuit, it is characterized in that:

A. described operating mechanism comprises the handle (4) that is hinged in the lower house (2), connecting rod (5) connects handle (4) and cam (8), form the flexible connection of mutual interlock, cam (8) top is provided with and is hinged on the fan-shaped catch members (20) that lower house (2) is upward stirred by connecting rod, it is provided with escapement spring (6) with the bar type escapement bar (3) that is hinged on the lower house, the cam top also is provided with the short movable feeler lever (9) and the movable feeler lever spring (10) that driven by cam (8) that is connected with moving contact (12), and cam spring (7) is inlaid in and acts in the enclosure slot on the cam (8);

B. cam (8) below also is provided with the long movable feeler lever (25) that driven by cam (8) with the same centre of gyration of short movable feeler lever (9);

C. be provided with, the center line tension seat (27) of the upper and lower dislocation in right side contour, center line tablet (26), center line output board (29) between middle shell (16) and the lower house (2) with phase line tension seat left side, be welded with fixed contact (13) on the center line tablet (26) equally, run-on tab (28) and center line tablet (26) welding, moving contact (12) is connected with center line output board (29) by the copper pigtail line, forms the neutral return circuit.

2, the shell band center line circuit breaker of moulding as claimed in claim 1 is characterized in that having in the phase line loop circuit adjustment screw (22) that acts on the bearing (21).