Circuit breaker with standby switch

Abstract

The utility model relates to the field of circuit breakers, in particular to a circuit breaker with a standby switch. Comprising a shell, the shell comprises a cover plate and a mounting seat, and an input terminal, an output terminal and an operating handle are arranged in the shell; the standby switch comprises a first connecting terminal which is electrically connected with the input terminal; the second connecting terminal is electrically connected with the output terminal; the guide pin is fixedly arranged on the second connecting terminal; one end of the knife switch abuts against the surface of the first connecting terminal, a guide groove is formed in the knife switch, and the guide pin is arranged in the guide groove and can slide in the guide groove; one end of the rotating rod is hinged to the mounting seat, and the other end of the rotating rod is hinged to the knife switch; the radius of the guide groove is the same as that of the motion trail of the tail end of the rotating rod, and the rotating directions are opposite; according to the utility model, when the circuit breaker fails and short-time emergency work is needed, the standby switch can be closed, and the circuit can be closed in a short time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit breaker field especially a circuit breaker with spare switch. BACKGROUND

[0002] The circuit breaker with spare switch (Molded Case Circuit Breaker, MCCB for short) is a widely used electrical protection device, and its main function is to protect the electrical system from overload, short circuit and other abnormal conditions.

[0003] When the current exceeds the set value, the circuit breaker with spare switch will automatically disconnect the circuit to prevent the wire and equipment from being damaged due to overload.

[0004] When the circuit breaker with spare switch is realized by thermal tripping principle: by using bimetallic strip (such as copper and iron) to realize. When the current overload, the current passes through the metal sheet, which makes it heat up and bend. When it bends to a certain extent, it will trigger the mechanical switch to disconnect the circuit.

[0005] When the connecting contact in the circuit breaker with spare switch is damaged, the circuit cannot be closed, at which time the circuit is paralyzed.

[0006] Therefore, it is urgent to provide an improved technical solution to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at the above-mentioned technical problems, and provides a circuit breaker with spare switch.

[0008] Therefore, the utility model provides a circuit breaker with spare switch, which comprises:

[0009] The shell comprises a cover plate and a mounting seat, and an input terminal, an output terminal and an operating handle are arranged in the shell.

[0010] The spare switch comprises:

[0011] The first connecting terminal is electrically connected with the input terminal;

[0012] The second connecting terminal is electrically connected with the output terminal;

[0013] The guide pin is fixedly arranged on the second connecting terminal.

[0014] The blade abuts against the surface of the first connecting terminal at one end, and a guide groove is arranged on the blade, the guide pin is arranged in the guide groove, and the guide pin can slide in the guide groove.

[0015] A rotating rod, one end of which is hinged to the mounting base and the other end of which is hinged to the switch.

[0016] The guide groove is an arc shape with the same radius as the radius of the movement trajectory at the end of the rotating rod and opposite to the direction of rotation.

[0017] Furthermore, the switch includes two switches, which are connected by a connecting rod, forming a gap between the two switches, and the rotating rod is hinged to the connecting rod near the first connecting terminal.

[0018] Furthermore, the end of the guide groove closest to the second connecting terminal is the end closest to the cover plate, and the end closest to the first connecting terminal is the end furthest from the cover plate. A warning part that can slide perpendicularly to the cover plate is provided on the cover plate. One end of the warning part abuts against the front end face of the switch. When the guide pin reaches the lowest point of the guide groove, the switch will extend the warning part from the cover plate.

[0019] Furthermore, there are three sets of input terminals and output terminals, and three sets of identical switches, first connecting terminals and second connecting terminals are provided. The switches are fixed together by a fixing rod, and only the middle switch is provided with a rotating rod.

[0020] Furthermore, the operating handle is fixed to the rotating rod, and the operating handle controls the rotation of the rotating rod.

[0021] Furthermore, the first and second connecting terminals are L-shaped.

[0022] The beneficial effects of this utility model are:

[0023] 1. When a circuit breaker fails and a short-term emergency operation is required, this utility model can close the backup switch to temporarily close the circuit.

[0024] 2. This utility model is provided with two switch blades, which are fixedly connected by several connecting rods. The two switch blades can widen the passage and increase the conductivity. Furthermore, a pin is provided between the two switch blades, and the switch blades are provided with two pin positioning points, which makes the structure more stable. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the backup switch of this utility model;

[0027] Figure 3 This is a three-dimensional structural diagram of the backup switch of this utility model;

[0028] Figure 4 This is a schematic diagram of the warning section of this utility model.

[0029] The figure is marked as:

[0030] 1, housing; 2, cover plate; 3, mounting seat; 5, first connecting terminal; 6, second connecting terminal; 7, input terminal; 8, output terminal; 9, guide pin; 10, gate; 11, guide groove; 12, rotating rod; 13, connecting rod; 14, fixed rod; 15, operating handle; 16, warning part. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0032] Embodiment 1:

[0033] The embodiment provides a circuit breaker with a backup switch, comprising:

[0034] The housing 1 comprises a cover plate 2 and a mounting seat 3, and the housing 1 is provided with an input terminal 7 and an output terminal 8 and an operating handle 15 inside the housing 1;

[0035] The backup switch comprises:

[0036] The first connecting terminal 5 is electrically connected with the input terminal 7;

[0037] The second connecting terminal 6 is electrically connected with the output terminal 8;

[0038] The guide pin 9 is fixedly arranged on the second connecting terminal 6;

[0039] The gate 10 abuts on the surface of the first connecting terminal 5 at one end, and the guide groove 11 is arranged on the gate 10, and the guide pin 9 is arranged in the guide groove 11 and can slide in the guide groove 11;

[0040] The rotating rod 12 is hingedly connected to the mounting seat 3 at one end and hingedly connected to the gate 10 at the other end;

[0041] The guide groove 11 is in the shape of a circular arc with the same radius as the radius of the movement track of the end of the rotating rod 12 and opposite rotation direction.

[0042] The housing 1 comprises the cover plate 2 arranged in front and the mounting seat 3 arranged at the back, which are connected by fasteners, and the input terminal 7 and the output terminal 8 are arranged on the upper and lower sides inside the housing 1 respectively, and the operating handle 15 arranged outside is arranged in front, the operating handle 15 is used to disconnect and close the circuit, and the conventional structure of the circuit breaker arranged inside is not described in detail in the present application.

[0043] The standby switch is arranged on one side of the operating handle 15, and is arranged on the right side of the operating handle 15 in this embodiment. The standby switch comprises the following structure.

[0044] The first connecting terminal 5 is electrically connected to the input terminal 7 through a wire to ensure the reliability of current transmission, and the second connecting terminal 6 is electrically connected to the output terminal 8 through a wire. In addition, the contact 10 is made of a material with high conductivity to reduce the contact resistance and improve the agility of the switch action.

[0045] The guide pin 9 can be fixed on the second connecting terminal 6 by welding. The guide pin 9 is transversely arranged, and the contact 10 is in a rectangular sheet structure. One end of the contact 10 abuts against the surface of the first connecting terminal 5. A through guide groove 11 is formed in the surface of the contact 10, and the guide groove 11 is arranged on the side of the contact 10 close to the second connecting terminal 6. The guide pin 9 is arranged in the guide groove 11, and the guide pin 9 can slide along the guide groove 11. One end of the rotating rod 12 is hinged to the mounting seat 3, so that the rotating rod 12 can rotate. The other end of the rotating rod 12 is hinged to the contact 10. The guide groove 11 is in a circular arc shape with the same radius as the motion track radius of the end of the rotating rod 12 and opposite rotation direction.

[0046] The working principle is that the contact 10 slides on the guide pin 9 by rotating the rotating rod 12. Since the guide groove 11 is in a circular arc shape with the same radius as the motion track radius of the end of the rotating rod 12 and opposite rotation direction, when the rotating rod 12 is rotated, the contact 10 moves, and the contact 10 is always perpendicular to the surface of the first connecting terminal 5, that is, the end surface of the contact 10 is always parallel to the surface of the first connecting terminal 5. The contact 10 is always in surface contact with the first connecting terminal 5 when the contact 10 opens and closes the circuit, so that the contact 10 has better conductivity. In addition, when the circuit breaker fails and short-time emergency work is required, the standby switch can be closed to close the circuit for a short time.

[0047] Embodiment 2

[0048] The embodiment provides a circuit breaker with a standby switch. In addition to the technical solutions of the above-mentioned embodiments, the circuit breaker with a standby switch further has the following technical features.

[0049] The contact 10 includes two contacts 10, and the two contacts 10 are connected through a connecting rod 13. A gap is formed between the two contacts 10, and the rotating rod 12 is hinged to the connecting rod 13 close to the first connecting terminal 5.

[0050] Two contacts 10 are arranged, and the two contacts 10 are fixedly connected through a plurality of connecting rods 13. The arrangement of the two contacts 10 can widen the passage and increase the conductivity. In addition, one pin is arranged between the two contacts 10, and the contact 10 is provided with two pin positioning points, so that the structure is more stable.

[0051] Embodiment 3:

[0052] The circuit breaker with a backup switch provided in the embodiment has the technical features of the circuit breaker with a backup switch provided in the above embodiments.

[0053] The end of the guide slot 11 closest to the second connecting terminal 6 is the end closest to the cover plate 2, and the end closest to the first connecting terminal 5 is the end farthest from the cover plate 2. An alarm part 16 that can slide perpendicularly to the cover plate 2 is arranged on the cover plate 2, and one end of the alarm part 16 abuts against the front end surface of the contactor 10. When the guide pin 9 reaches the lowest point of the guide slot 11, the contactor 10 will abut against the alarm part 16 to make the alarm part 16 extend out of the front end surface of the cover plate 2.

[0054] When the circuit breaker is closed, the contactor 10 is farthest from the cover plate 2, and the alarm part 16 does not extend out of the front end surface of the cover plate 2. When the circuit breaker is opened, the contactor 10 is closest to the cover plate 2, and the alarm part 16 extends out of the surface of the cover plate 2, which can indicate the working state of the contactor 10 at this time.

[0055] Embodiment 4:

[0056] The circuit breaker with a backup switch provided in the embodiment has the technical features of the circuit breaker with a backup switch provided in the above embodiments.

[0057] The input terminal 7 and the output terminal 8 are provided with three groups of the contactor 10, the first connecting terminal 5 and the second connecting terminal 6, which have the same structure. The contactors 10 are fixed by the fixing rod 14, and only the middle contactor 10 is provided with the rotating rod 12.

[0058] Since the circuit breaker is usually a three-phase circuit and has three live wires, three groups of the contactor 10 and the first connecting terminal 5 and the second connecting terminal 6 matched with the contactor 10 are needed. The contactors 10 are fixed by the fixing rod 14, and only the middle contactor 10 is provided with the rotating rod 12. By rotating one rotating rod 12, all the contactors 10 can be moved at the same time.

[0059] The operating handle 15 is fixed with the rotating rod 12. The operating handle 15 controls the rotation of the rotating rod 12.

[0060] The operating handle 15 is fixed with the rotating rod 12. The operating handle 15 controls the rotation of the rotating rod 12.

[0061] The first connecting terminal 5 and the second connecting terminal 6 are L-shaped.

[0062] It is convenient to fix the first connecting terminal 5 and the second connecting terminal 6 on the mounting base 3.

[0063] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other without conflict, the present application is not limited to the above-described specific embodiments, the above-described specific embodiments are only illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims, which all belong to the protection scope of the present application.

Claims

1. A circuit breaker having a back-up switch, characterized by The utility model relates to a kind of switch, including: Shell (1), shell (1) includes cover plate (2) and mounting seat (3), and input terminal (7) and output terminal (8) and operating handle (15) are provided in shell (1); Backup switch, backup switch includes: First connection terminal (5), with input terminal (7) electrically connected; Second connection terminal (6), with output terminal (8) electrically connected; Guide pin (9), fixedly arranged on second connection terminal (6); Blade (10), one end is abutted on the surface of first connection terminal (5), and guide slot (11) is provided on blade (10), guide pin (9) is arranged in guide slot (11), and guide pin (9) can slide in guide slot (11); Rotary lever (12), one end of rotary lever (12) is hinged in mounting seat (3), and the other end is hinged in blade (10); Wherein, guide slot (11) is the shape of circular arc with the same radius and opposite rotating direction as the motion track radius of the end of rotary lever (12).

2. A circuit breaker with a backup switch according to claim 1, characterized in that, Blade (10) includes two, and two blades (10) are connected by connecting rod (13), clearance is formed between two blades (10), and rotary lever (12) is hinged in connecting rod (13) close to first connection terminal (5).

3. The circuit breaker with a backup switch of claim 1, wherein, The end of guide slot (11) close to second connection terminal (6) is the end closest to cover plate (2), the end close to first connection terminal (5) is the end farthest from cover plate (2), and warning part (16) that can slide perpendicularly to cover plate (2) is provided on cover plate (2), one end of warning part (16) is abutted on the front end face of blade (10), when guide pin (9) reaches the lowest point of guide slot (11), blade (10) will warning part (16) from cover plate (2) abutted and extend.

4. The circuit breaker with backup switch of claim 1, wherein, Input terminal (7) and output terminal (8) are provided with three groups, and three groups of blade (10), first connection terminal (5) and second connection terminal (6) with same structure are provided, and blade (10) is fixed by fixed rod (14) between, and only middle blade (10) is provided with rotary lever (12).

5. The circuit breaker with backup switch of claim 1, wherein, Operating handle (15) is fixed with rotary lever (12), and operating handle (15) controls rotary lever (12) to rotate.

6. The circuit breaker with backup switch of claim 1, wherein, First connection terminal (5) and second connection terminal (6) are L-shaped.

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