Circuit breaker switch

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker switch, which comprises an insulating frame and a circuit breaker main body arranged on the insulating frame, the circuit breaker main body comprises a circuit breaker main shaft, a cam piece and a vacuum tube, the circuit breaker main shaft drives the cam piece to rotate, one end of the vacuum tube is provided with a connecting column, and the other end of the vacuum tube is provided with a spring. The connecting column is matched with the cam piece through a transverse pin, the insulating frame is further provided with a cam support through a fastener, the cam support covers the outside of the cam piece, the cam support is internally provided with a pressure equalizing cavity for the cam piece to rotate, and the circuit breaker main shaft penetrates through the cam support. According to the utility model, the cam member is wrapped in the cam support, so that the electric field distribution is uniform, the insulation capability is stronger, and the sliding chute of the cam support is used for guiding the moving path of the connecting column, so that the stable work of the circuit breaker is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker switch. Background Art

[0002] The environmental protection cabinet is an electrical device that uses high-voltage switchgear to form an interval-type ring network power supply unit. It is mainly used in distribution stations or box-type substations in public buildings, industrial and mining enterprises, and residential communities. The environmental protection cabinet distributes the electric energy transmitted by the power supply to the trunk line through high-voltage switches. It is an important switchgear for ring network power supply and terminal power supply, and its short-circuit breaking capacity reaches the level of switchgear.

[0003] In the existing environmental protection cabinet circuit breaker, the circuit breaker main shaft usually drives the circuit breaker moving contact to move up and down linearly through a cam to realize the circuit breaker opening and closing. However, the cam adopts an open installation structure and is exposed to the outside, with poor insulation capacity and uneven electric field distribution. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a circuit breaker switch. The cam member of the present invention is wrapped inside the cam bracket, so that the electric field distribution is uniform and the insulation capacity is stronger. The sliding groove of the cam bracket is used to guide the movable path of the connecting column to ensure the stable operation of the circuit breaker.

[0005] The technical solution adopted by the present utility model is as follows: a circuit breaker switch, comprising an insulating frame and a circuit breaker body arranged on the insulating frame, the circuit breaker body comprising a circuit breaker main shaft, a cam part and a vacuum tube, the circuit breaker main shaft drives the cam part to rotate, a connecting column is provided at one end of the vacuum tube, the connecting column cooperates with the cam part through a cross pin, a cam bracket is also installed on the insulating frame through a fastener, the cam bracket is covered on the outside of the cam part, and a pressure equalizing chamber for the cam part to rotate is provided inside the cam bracket, the circuit breaker main shaft passes through the cam bracket, and the inner wall of the cam bracket is also recessed with a sliding groove for the cross pin to extend into.

[0006] The cam component includes an integrally formed first cam connecting plate, a second cam connecting plate and a cross beam. The first cam connecting plate and the second cam connecting plate have the same structure and are symmetrical along the cross beam. The two ends of the cross pin respectively cooperate with the first cam connecting plate and the second cam connecting plate. The inner walls on both sides of the cam bracket are recessed with sliding grooves for the cross pin to extend into.

[0007] The cam bracket includes a first frame body and a second frame body that are interlocked with each other. A card block is protruded from the edge of the first frame body, and a card slot that is compatible with the card block is recessed on the edge of the second frame body. The card block is engaged with the card slot.

[0008] The inner angles of the cam bracket are all arc angles.

[0009] A process hole is provided on the outer wall of the cam bracket at a position corresponding to the slide groove.

[0010] The utility model also includes a side frame, one end of which is connected to the cam bracket and the other end of which is connected to the vacuum tube, and the side frame also passes through the insulating frame.

[0011] The insulating frame is also provided with a first isolating insulating seat, a second isolating insulating seat, an isolating switch and a grounding component. The grounding component includes a grounding connecting plate and a grounding static contact arranged on the grounding connecting plate. The first isolating insulating seat and the second isolating insulating seat are both clamped and fixed to the insulating frame, and the first isolating insulating seat and the second isolating insulating seat are both made of epoxy resin.

[0012] The isolating switch includes a knife switch and an arc-shaped moving contact box. The moving contact box drives the knife switch to rotate, and both ends of the moving contact box are provided with openings for the knife switch to cooperate with. The side walls of the openings are provided with adjustment holes, and the adjustment holes are buckled with cover plates. An operating shaft is provided in the middle of the moving contact box, and the moving contact box rotates along the operating shaft.

[0013] The beneficial effects of the present invention are as follows: the cam part of the present invention is wrapped inside the cam bracket, and the pressure-equalizing chamber inside the cam bracket is used to equalize the pressure of the electric field, so that the electric field is evenly distributed and the insulation capacity is stronger, and the slide groove of the cam bracket is used to guide the moving path of the connecting column. The slide groove is a strip groove extending along the axial direction of the connecting column. The connecting column is matched by extending into the slide groove through a cross pin. The cross pin is set in the slide groove for reciprocating sliding. The connecting column can move stably up and down in a straight line, playing a guiding role, and ensuring the stable operation of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0015] Figure 1 This is a schematic structural diagram of a circuit breaker switch of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model with one piece of insulation frame removed;

[0017] Figure 3 This is a structural diagram of the circuit breaker main body in the utility model;

[0018] Figure 4A schematic diagram of the structure of the circuit breaker body without the second frame;

[0019] Figure 5 This is a schematic structural diagram of the first frame in the present utility model;

[0020] Figure 6 This is a structural diagram of the moving contact box in the utility model;

[0021] In the figure, 1-insulating frame, 2-circuit breaker main shaft, 3-cam member, 4-vacuum tube, 5-connecting column, 6-cross pin, 7-cam bracket, 8-pressure equalizing chamber, 9-slide groove, 10-first cam connecting plate, 11-second cam connecting plate, 12-cross beam, 13-first frame, 14-second frame, 15-block, 16-slot, 17-process hole, 18-side frame, 19-first isolation insulating seat, 20-second isolation insulating seat, 21-grounding connecting plate, 22-grounding static contact, 23-knife switch, 24-moving contact box, 25-opening, 26-adjustment hole, 27-cover plate, 28-operating shaft. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0024] The directional and positional terms used in this invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are used solely to refer to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are intended to illustrate and facilitate understanding of this invention and are not intended to limit the scope of protection of this invention.

[0025] like Figures 1 to 6As shown, an embodiment of the present utility model is a circuit breaker switch, comprising an insulating frame 1 and a circuit breaker body arranged on the insulating frame 1, the circuit breaker body comprising a circuit breaker main shaft 2, a cam member 3 and a vacuum tube 4, the circuit breaker main shaft 2 drives the cam member 3 to rotate, one end of the vacuum tube 4 is provided with a connecting column 5, the connecting column 5 cooperates with the cam member 3 through a cross pin 6, and a cam bracket 7 is further installed on the insulating frame 1 through a fastener, the cam bracket 7 is covered on the outside of the cam member 3, and a pressure equalizing chamber 8 for the cam member 3 to rotate is provided inside the cam bracket 7, the circuit breaker main shaft 2 passes through the cam bracket 7, and the inner wall of the cam bracket 7 is also recessed with a slide groove 9 for the cross pin 6 to extend into.

[0026] The beneficial effects of such a setting are as follows: the cam member of the utility model is wrapped inside the cam bracket, and the pressure-equalizing chamber inside the cam bracket is used to equalize the pressure of the electric field, so that the electric field is evenly distributed and the insulation capacity is stronger, and the slide groove of the cam bracket is used to guide the movable path of the connecting column. The slide groove is a strip groove extending along the axial direction of the connecting column. The connecting column is matched by extending the cross pin into the slide groove. The cross pin is set in the slide groove for reciprocating sliding. The connecting column can move stably up and down in a straight line, which plays a guiding role and ensures the stable operation of the circuit breaker.

[0027] It is further configured that the cam member 3 includes an integrally formed first cam connecting piece 10, a second cam connecting piece 11 and a cross beam 12. The first cam connecting piece 10 and the second cam connecting piece 11 have the same structure and are symmetrical along the cross beam 12. The two ends of the cross pin 6 are respectively matched with the first cam connecting piece 10 and the second cam connecting piece 11. The inner walls on both sides of the cam bracket 7 are recessed with a sliding groove 9 for the cross pin 6 to extend into.

[0028] The beneficial effects of this arrangement are as follows: the first cam connecting plate and the second cam connecting plate are respectively matched with the two ends of the cross pin, and both ends of the cross pin can also be matched with sliding grooves, so that the two ends are evenly stressed and the transmission is more stable. The first cam connecting plate and the second cam connecting plate are connected by a cross beam and are integrally formed to ensure synchronous rotation and prevent resistance and bouncing on the connecting column.

[0029] It is further configured that the cam bracket 7 includes a first frame body 13 and a second frame body 14 that are interlocked with each other, the edge of the first frame body 13 is protruded with a card block 15, the edge of the second frame body 14 is recessed with a card slot 16 that is adapted to the card block 15, and the card block 15 is engaged with the card slot 16.

[0030] The beneficial effects of this arrangement are as follows: the cam bracket adopts a split structure, which is easy to disassemble. When installed, the clamping block and the clamping slot are engaged to prevent the first frame and the second frame from rotating relative to each other, thereby ensuring that the cam bracket is firmly fixed.

[0031] It is further provided that the inner angles of the cam bracket 7 are all arc angles.

[0032] The beneficial effects of this arrangement are as follows: the arc angle further helps to evenly distribute the electric field.

[0033] It is further provided that a process hole 17 is opened at a position on the outer wall of the cam bracket 7 corresponding to the slide groove 9 .

[0034] The beneficial effects of such a setting are as follows: the process hole is used for inserting tools such as conventional screws, and the screws drive the cross pins to move up and down to test the mechanical characteristics of the circuit breaker.

[0035] Further configuration includes a side frame 18 , one end of the side frame 18 is connected to the cam bracket 7 and the other end is connected to the vacuum tube 4 , and the side frame 18 also passes through the insulating frame 1 .

[0036] The beneficial effects of this arrangement are as follows: the vacuum tube and the cam bracket are connected by the side frame, thereby further improving the structural strength of the circuit breaker and the stability of the transmission.

[0037] It is further provided that the insulating frame 1 is also provided with a first isolating insulating seat 19, a second isolating insulating seat 20, an isolating switch and a grounding component, the grounding component includes a grounding connecting plate 21 and a grounding static contact 22 arranged on the grounding connecting plate 21, the first isolating insulating seat 19 and the second isolating insulating seat 20 are both clamped and fixed to the insulating frame 1, and the first isolating insulating seat 19 and the second isolating insulating seat 20 are both made of epoxy resin.

[0038] The beneficial effects of this arrangement are as follows: the grounding assembly and the disconnector are integrated into the insulating frame to realize the main functions of the circuit breaker, with a compact structure and lower production costs. The insulating frame also adopts a two-piece split structure, and the first isolating insulating seat and the second isolating insulating seat are connected to each insulating frame by a snap-on connection and are firmly fixed between the two insulating frames.

[0039] It is further provided that the isolating switch includes a knife switch 23 and an arc-shaped moving contact box 24, the moving contact box 24 drives the knife switch 23 to rotate, and both ends of the moving contact box 24 are provided with an opening 25 for the knife switch 23 to cooperate with, and the side wall of the opening 25 is provided with an adjustment hole 26, and the adjustment hole 26 is fastened with a cover plate 27, and an operating shaft 28 is provided in the middle of the moving contact box 24, and the moving contact box 24 rotates along the operating shaft 28.

[0040] The beneficial effects of this arrangement are as follows: the moving contact box rotates along the operating shaft and drives the knife switch to rotate at the same time, thereby realizing the switching between closing, opening and grounding of the disconnector. The moving contact box adopts an arc shape, which greatly reduces the inertia of rotation compared to the linear type of the existing technology. The adjustment hole that is fastened through the cover plate is used to adjust the pressure of the end contact of the knife switch. When adjustment is required, the cover plate can be removed to see the knife switch. At the same time, the cover plate can also prevent the propagation of arc, which is reliable and safe to operate.

[0041] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. Circuit breaker switch, characterized by: The invention comprises an insulating frame (1) and a circuit breaker body arranged on the insulating frame (1), wherein the circuit breaker body comprises a circuit breaker main shaft (2), a cam member (3) and a vacuum tube (4), wherein the circuit breaker main shaft (2) drives the cam member (3) to rotate, and a connecting column (5) is provided at one end of the vacuum tube (4), and the connecting column (5) cooperates with the cam member (3) through a transverse pin (6). A cam bracket (7) is also installed on the insulating frame (1) through a fastener, and the cam bracket (7) is covered on the outside of the cam member (3), and a pressure equalizing chamber (8) is provided inside the cam bracket (7) for the cam member (3) to rotate, and the circuit breaker main shaft (2) passes through the cam bracket (7), and the inner wall of the cam bracket (7) is also recessed with a slide groove (9) for the transverse pin (6) to extend into.

2. The circuit breaker switch according to claim 1, characterized in that: The cam member (3) comprises an integrally formed first cam connecting piece (10), a second cam connecting piece (11) and a cross beam (12); the first cam connecting piece (10) and the second cam connecting piece (11) have the same structure and are symmetrical along the cross beam (12); the two ends of the cross pin (6) respectively cooperate with the first cam connecting piece (10) and the second cam connecting piece (11); and the inner walls on both sides of the cam bracket (7) are recessed with a slide groove (9) for the cross pin (6) to extend into.

3. The circuit breaker switch according to claim 1, characterized in that: The cam bracket (7) comprises a first frame body (13) and a second frame body (14) that are interlocked, wherein a block (15) is protruded from an edge of the first frame body (13), and a slot (16) that matches the block (15) is recessed from an edge of the second frame body (14), and the block (15) is engaged with the slot (16).

4. The circuit breaker switch according to claim 1, wherein: The inner angles of the cam bracket (7) are all arc angles.

5. The circuit breaker switch according to claim 1, characterized in that: A process hole (17) is provided on the outer wall of the cam bracket (7) at a position corresponding to the slide groove (9).

6. The circuit breaker switch according to claim 1, characterized in that: It also includes a side frame (18), one end of the side frame (18) is connected to the cam bracket (7) and the other end is connected to the vacuum tube (4), and the side frame (18) also passes through the insulating frame (1).

7. The circuit breaker switch according to claim 1, characterized in that: The insulating frame (1) is further provided with a first isolating insulating seat (19), a second isolating insulating seat (20), an isolating switch and a grounding assembly, wherein the grounding assembly comprises a grounding connecting plate (21) and a grounding static contact (22) arranged on the grounding connecting plate (21), the first isolating insulating seat (19) and the second isolating insulating seat (20) are both fixedly connected to the insulating frame (1), and the first isolating insulating seat (19) and the second isolating insulating seat (20) are both made of epoxy resin.

8. The circuit breaker switch according to claim 7, characterized in that: The isolating switch comprises a knife switch (23) and an arc-shaped moving contact box (24), wherein the moving contact box (24) drives the knife switch (23) to rotate, and both ends of the moving contact box (24) are provided with openings (25) for the knife switch (23) to cooperate with, and the side wall of the opening (25) is provided with an adjustment hole (26), and the adjustment hole (26) is fastened with a cover plate (27), and an operating shaft (28) is provided in the middle of the moving contact box (24), and the moving contact box (24) rotates along the operating shaft (28).

Images