Reclosing circuit breaker combination

Abstract

The utility model provides a reclosing circuit breaker combination, which belongs to the technical field of circuit breakers, and comprises a circuit breaker unit and a reclosing unit, the circuit breaker unit comprises an operating mechanism, a moving contact, a static contact and an arc extinguish chamber, the circuit breaker unit comprises an arc striking channel arranged in an arc shape, the arc striking channel comprises a first port and a second port, and the first port is communicated with the second port. One of the upper side and the lower side of the arc striking channel is provided with an arc-shaped guide plate in the direction of the arc striking channel, the other one is provided with an arc isolating seat, and one side, opposite to the arc striking channel, of the arc isolating seat is provided with a magnetic conductive plate; according to the utility model, through the arc-shaped arc striking channel and the arc-shaped guide plate in the arc striking channel, the arc can be dispersed more effectively, the cooling and arc extinguishing process can be accelerated, meanwhile, stronger arc extinguishing airflow can be formed in the arc striking channel, the cooling effect of the arc is improved, and the arc is further lengthened and dispersed through the magnetic conductive plate, so that the arc extinguishing effect is improved. And the arc isolating seat can effectively protect the magnetic conductive plate from being damaged by the arc.

Description

Technical Field

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

[0002] A circuit breaker is a switching device that can close, carry and interrupt the current under normal circuit conditions and close, carry and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers are widely used in various places such as industry, commerce, high-rise and residential buildings. They can provide overcurrent protection and leakage protection for electrical equipment such as motors, distribution lines, lighting circuits, etc. Circuit breakers are generally composed of contact systems, arc extinguishing systems, operating mechanisms, trippers, casings, etc. Some circuit breakers include reclosing units, which can automatically open when a short circuit or overload is detected, and then try to reclose after a predetermined time interval to check whether the fault has been cleared. If the fault still exists, the reclosing will open again, and after a certain number of attempts (usually three to four times), if the fault has not been cleared, it will remain in the disconnected state.

[0003] In the prior art, an arc is generated when the static contact and the moving contact of the circuit breaker are disconnected. The arc needs to be introduced into the arc extinguishing chamber for rapid extinguishing. However, the arc striking effect between the arc generating position and the arc extinguishing chamber in the current circuit breaker is general, resulting in low arc extinguishing efficiency in the circuit breaker. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a reclosing circuit breaker combination.

[0005] The technical solution adopted by the utility model is as follows: a reclosing circuit breaker combination, comprising at least one circuit breaker unit and a reclosing unit, the circuit breaker unit comprising an operating mechanism, a moving contact, a static contact and an arc extinguishing chamber, the operating mechanism comprising an operating handle, the operating handle being connected to a synchronously rotating transmission shaft, the transmission shaft being linked with the reclosing unit, the circuit breaker unit also comprising an arc-shaped arc-striking channel, the arc-striking channel comprising a first port toward the position where the moving contact and the static contact are disconnected and a second port toward the arc extinguishing chamber, and a cross-section gradually increases from the first port to the second port, the upper side and the lower side of the arc-striking channel, one of which is provided with at least one arc-shaped guide plate along the direction of the arc-striking channel, and the other is provided with an arc-isolating seat, and a magnetic conductive plate is provided on the side of the arc-isolating seat facing away from the arc-striking channel.

[0006] The circuit breaker unit also includes a bimetallic strip, and the arc-striking channel includes a first arc-striking plate and a second arc-striking plate, one end of the first arc-striking plate is connected to the end of the static contact, and the other end is bent and extends into the arc extinguishing chamber, one end of the second arc-striking plate is connected to the bimetallic strip, and the other end extends to the side of the arc extinguishing chamber away from the static contact.

[0007] The second arc-striking plate includes an arc-shaped plate portion and a partition portion which form an arc-striking channel with the first arc-striking plate. A convex strip is arranged on the arc-shaped plate portion along the direction of the arc-striking channel and toward the inside of the arc-striking channel. The partition portion extends from a side of the arc-extinguishing chamber away from the static contact to the tail end of the arc-extinguishing chamber, and its width is greater than the width of the second arc-striking plate.

[0008] A mounting groove is arranged on the side of the arc isolation seat facing away from the arc striking channel, the magnetic conductive plate is arranged in the mounting groove, an arc isolation plate is also arranged in the mounting groove, and the magnetic conductive plate is arranged between the arc isolation seat and the arc isolation plate.

[0009] The circuit breaker unit also includes a first shell, a connecting flange is provided at one end of the arc isolation seat, a first positioning hole is provided on the connecting flange, a first positioning column is provided on the first shell corresponding to the first positioning hole, a connecting column is provided in the mounting groove, a second positioning hole is provided on the connecting column along the axial direction, through holes for the connecting column to pass through are provided on the magnetic conductive plate and the arc isolation plate, and a second positioning column is provided on the first shell corresponding to the second positioning hole.

[0010] The first positioning hole and the first positioning column as well as the second positioning hole and the second positioning column are all located outside the arc striking channel.

[0011] The arc extinguishing chamber is provided with a V-shaped arc-striking opening toward the arc-striking channel, the first arc-striking plate is provided with a V-shaped end, the V-shaped end extends into the V-shaped arc-striking opening, and the V-shaped end is aligned with the central axis of the V-shaped arc-striking opening, and the tip of the V-shaped end is arranged in an arc shape.

[0012] The arc extinguishing chamber includes a fixed frame and a plurality of arc extinguishing grids arranged in parallel and at intervals on the fixed frame, the arc extinguishing grid is provided with a V-shaped first arc striking groove facing the arc striking channel, a plurality of the V-shaped grooves form the V-shaped arc striking opening, the arc extinguishing grid is provided with a second arc striking groove at the bottom end of the first arc striking groove, and the second arc striking groove is arranged in a straight line.

[0013] The reclosing unit includes a second shell and a motor, a transmission gear set, a transmission member and a circuit board arranged in the second shell. The output shaft of the motor is a worm, and the worm is meshed with the transmission gear set for transmission. The transmission gear set is meshed with the transmission member for transmission. The transmission member is connected to the operating handle and rotates synchronously. The motor is connected to the circuit board, and a control port and a feedback port are arranged on the circuit board.

[0014] The operating handle is provided with a first linkage hole axially therethrough, and the transmission member is provided with a second linkage hole coaxially with the first linkage hole. The first linkage hole and the second linkage hole are matching polygonal holes.

[0015] The beneficial effects of the utility model are as follows: in the utility model, the arc-shaped arc-striking channel and the arc-shaped guide plate therein can more effectively disperse the arc, accelerate the cooling and arc extinguishing process, and at the same time, the cross-section of the arc-striking channel is gradually increased to form a stronger arc-extinguishing airflow inside the arc-striking channel, thereby improving the cooling effect of the arc, and by arranging a magnetic conductive plate, the arc can be further elongated and dispersed, so that the arc is extinguished more quickly, and the arc isolation seat can effectively protect the magnetic conductive plate from damage by the arc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 It is a schematic diagram of the utility model;

[0018] Figure 2 The schematic diagram of the circuit breaker unit of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 3 The schematic diagram of the circuit breaker unit of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the second arc striking plate and the arc extinguishing chamber in the utility model;

[0021] Figure 5 It is a schematic diagram of the first arc striking plate, the second arc striking plate and the arc extinguishing chamber in the utility model;

[0022] Figure 6 The schematic diagram of the circuit breaker unit of the utility model is shown in FIG. Figure 3 ;

[0023] Figure 7 It is a schematic diagram of the arc seat, magnetic conductive plate and magnetic isolation plate in the utility model;

[0024] Figure 8 It is a schematic diagram of the reclosing unit in the utility model. DETAILED DESCRIPTION

[0025] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0026] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the description of this application, 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 with the same name or non-identical parameters. 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. The subsequent embodiments will not explain this one by one.

[0029] Embodiment 1:

[0030] like Figures 1 to 8As shown, a reclosing circuit breaker combination includes at least one circuit breaker unit and a reclosing unit, the circuit breaker unit includes an operating mechanism 1, a moving contact 2, a static contact 3 and an arc extinguishing chamber 4, the operating mechanism 1 includes an operating handle 101, a synchronously rotating transmission shaft is connected to the operating handle 101, and the transmission shaft is linked with the reclosing unit. The circuit breaker unit also includes an arc-shaped arc-striking channel 5, the arc-striking channel 5 includes a first port 51 toward the position where the moving contact 2 and the static contact 3 are disconnected and a second port 52 toward the arc extinguishing chamber 4, and a cross section along the direction from the first port 51 to the second port 52 Gradually increasing, the upper and lower sides of the arc striking channel 5, one is provided with at least one arc guide plate 6 along the direction of the arc striking channel 5, and the other is provided with an arc isolating seat 7, and the arc isolating seat 7 is provided with a magnetic conductive plate 8 on the side facing away from the arc striking channel 5. The arc striking channel 5 and the arc guide plate 6 therein can more effectively disperse the arc, accelerate the cooling and arc extinguishing process, and at the same time, the cross-section of the arc striking channel gradually increases to form a stronger arc extinguishing airflow inside the arc striking channel 11, thereby improving the cooling effect of the arc, and by providing a magnetic conductive plate, the arc can be further elongated and dispersed, so that the arc is extinguished more quickly, and the arc isolating seat 7 can effectively protect the magnetic conductive plate from arc damage.

[0031] The circuit breaker unit further includes a bimetallic strip 9, which is usually used for overload protection. When an overload current passes through, the bimetallic strip bends due to thermal expansion, triggering the circuit breaker to operate.

[0032] The arc striking channel 5 includes a first arc striking plate 53 and a second arc striking plate 54. One end of the first arc striking plate 53 is connected to the end of the static contact 3, and the other end is bent and extended into the arc extinguishing chamber 4, which helps the arc to be dispersed and extinguished more quickly after entering the arc extinguishing chamber, effectively increasing the path length of the arc and improving the arc extinguishing efficiency. One end of the second arc striking plate 54 is connected to the bimetallic strip 9, and the other end extends to the side of the arc extinguishing chamber 4 away from the static contact 3. The first arc striking plate 53 and the second arc striking plate 54 form a more stable arc path.

[0033] The second arc-striking plate 54 includes an arc-shaped plate portion 541 and a partition portion 542 that form an arc-striking channel 5 with the first arc-striking plate 53. The arc-shaped plate portion 541 is provided with a convex strip 543 along the direction of the arc-striking channel 5 and toward the inside of the arc-striking channel 5, which increases the surface area of ​​the arc in contact with the arc-striking channel, helps to dissipate heat and increase the cooling efficiency of the arc, and at the same time improves the strength of the second arc-striking plate 54. The partition portion 542 extends from the side of the arc-extinguishing chamber 4 away from the static contact 3 to the tail end of the arc-extinguishing chamber 4, ensuring that the arc is quickly introduced into the arc-extinguishing chamber 4, and the width of the partition portion 542 is greater than the width of the second arc-striking plate 54, covering the side of the arc-extinguishing chamber 4 as much as possible to prevent the arc from overflowing and causing damage to the circuit breaker housing.

[0034] The arc isolation seat 7 is provided with a mounting groove 71 on the side facing away from the arc striking channel 5, the magnetic conductive plate 8 is arranged in the mounting groove 71, an arc isolation plate 72 is also arranged in the mounting groove 71, and the magnetic conductive plate 8 is arranged between the arc isolation seat 7 and the arc isolation plate 72, so that the magnetic conductive plate 8 can be better protected and the stability of the magnetic conductive plate 8 in the circuit breaker can be improved.

[0035] The circuit breaker unit also includes a first shell 23, a connecting flange 10 is provided at one end of the arc isolation seat 7, a first positioning hole 11 is provided on the connecting flange 10, a first positioning column 12 is provided on the first shell 23 corresponding to the first positioning hole 11, a connecting column 13 is provided in the mounting groove 71, a second positioning hole 14 is provided on the connecting column 13 along the axial direction, a through hole 15 for the connecting column 13 to pass through is provided on the magnetic conductive plate 8 and the arc isolation plate 72, a second positioning column 16 is provided on the first shell 23 corresponding to the second positioning hole 14, and the design of the positioning holes and the positioning columns ensures that the arc isolation seat 7, the magnetic conductive plate 8 and the arc isolation plate 72 are stably limited in the first shell 23, thereby improving the reliability of the circuit breaker.

[0036] The first positioning hole 11 and the first positioning column 12 as well as the second positioning hole 14 and the second positioning column 16 are all located outside the arc striking channel 5 to prevent the positioning structure from interfering with the rapid introduction of the arc into the arc extinguishing chamber 4 in the arc striking channel 5 .

[0037] The arc extinguishing chamber 4 is provided with a V-shaped arc striking opening 41 facing the arc striking channel 5, and the first arc striking plate 53 is provided with a V-shaped end 531, and the V-shaped end 531 extends into the V-shaped arc striking opening 41, which helps to introduce the arc into the arc extinguishing chamber 4 more smoothly when breaking, and the V-shaped end 531 is aligned with the central axis of the V-shaped arc striking opening 41, and the tip of the V-shaped end 531 is arranged in an arc shape. The arc-shaped tip can reduce the violent fluctuation and sputtering of the arc, help to control the path of the arc, and ensure that the arc moves stably to a specific area in the arc extinguishing chamber 4, thereby improving the arc extinguishing stability and predictability.

[0038] The arc extinguishing chamber 4 includes a fixed frame 42 and a plurality of arc extinguishing grids 43 arranged in parallel and at intervals on the fixed frame 42. The arc extinguishing grid 43 is provided with a V-shaped first arc striking groove 431 facing the arc striking channel 5. The plurality of V-shaped grooves form the V-shaped arc striking opening 41. The arc extinguishing grid 43 is provided with a second arc striking groove 432 at the bottom end of the first arc striking groove 431. The second arc striking groove 432 is arranged in a straight line. Through the combined design of the V-shaped first arc striking groove 431 and the straight-line second arc striking groove 432, the arc can be introduced into the arc extinguishing chamber 4 more quickly, thereby improving the arc extinguishing efficiency. Among them, the straight-line design of the second arc striking groove 432 helps to extend the arc path, increase the time of arc extinguishing, and is conducive to preventing the arc from reigniting in a short time, thereby increasing the reliability of the circuit breaker disconnecting the circuit.

[0039] The reclosing unit includes a second housing 17 and a motor 18, a transmission gear set 19, a transmission member 20 and a circuit board 21 arranged in the second housing 17. The output shaft of the motor 18 is a worm 22. The worm 22 is meshed with the transmission gear set 19 for transmission. The transmission gear set 19 is meshed with the transmission member 20 for transmission. The transmission member 20 is connected to the operating handle 101 and rotates synchronously. The circuit breaker is controlled to open and close and the reclosing function is realized by the motor 22, which is conducive to realizing the intelligence of the circuit breaker.

[0040] The motor 18 is connected to the circuit board 21, and the circuit board 21 is provided with a control port and a feedback port, which can integrate the control logic of the circuit breaker. For example, through the control port, external instructions, such as commands to open or close the circuit, can be received, and then these instructions are converted into motion control signals of the motor to realize the automation and intelligence of the circuit breaker action. Among them, the feedback port allows the circuit board to receive feedback signals of the motor 18 and the circuit breaker status, which can ensure the accuracy and timeliness of the circuit breaker operation, and can prevent and diagnose faults. In addition, the circuit board 21 can reduce the traditional wiring structure, especially reduce the routing and wiring in the compact internal space of the small circuit breaker.

[0041] Secondly, a power supply can be provided on the circuit board 5 to supply power to the motor 22, or a power connection port can be provided.

[0042] In this embodiment, four circuit breaker units are provided, and the operating handles 101 of the four circuit breaker units are connected by a transmission shaft so as to be able to rotate synchronously, thereby achieving one-to-many operation through one reclosing unit, reducing the number of reclosing units and lowering the cost of the product.

[0043] The operating handle 101 is provided with a first linkage hole 102 along the axial direction, and the transmission member 20 is provided with a second linkage hole 201 coaxially with the first linkage hole 102. The first linkage hole 102 and the second linkage hole 201 are matched polygonal holes, and the polygonal shape can withstand greater torque without sliding, thereby enhancing the torque transmission efficiency. In this embodiment, the first linkage hole 102 and the second linkage hole 201 are matched triangular holes, and the transmission shaft is a triangular rod.

[0044] 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. A reclosing circuit breaker combination, comprising at least one circuit breaker unit and a reclosing unit, wherein the circuit breaker unit comprises an operating mechanism (1), a moving contact (2), a stationary contact (3) and an arc extinguishing chamber (4), wherein the operating mechanism (1) comprises an operating handle (101), wherein a synchronously rotating transmission shaft is connected to the operating handle (101), wherein the transmission shaft is linked with the reclosing unit, and wherein: The circuit breaker unit further comprises an arc-shaped arc-striking channel (5), the arc-striking channel (5) comprising a first port (51) facing the position where the moving contact (2) and the stationary contact (3) are disconnected and a second port (52) facing the arc-extinguishing chamber (4), and the cross-section gradually increases along the direction from the first port (51) to the second port (52), and at least one arc-shaped guide plate (6) is arranged on the upper side and the lower side of the arc-striking channel (5) along the direction of the arc-striking channel (5), and an arc-isolating seat (7) is arranged on the other side, and a magnetic conductive plate (8) is arranged on the side of the arc-isolating seat (7) facing away from the arc-striking channel (5).

2. A reclosing circuit breaker combination according to claim 1, characterized in that: The circuit breaker unit also includes a bimetallic strip (9), and the arc-striking channel (5) includes a first arc-striking plate (53) and a second arc-striking plate (54), one end of the first arc-striking plate (53) is connected to the end of the stationary contact (3), and the other end is bent and extends into the arc extinguishing chamber (4), and one end of the second arc-striking plate (54) is connected to the bimetallic strip (9), and the other end extends to a side of the arc extinguishing chamber (4) away from the stationary contact (3).

3. A reclosing circuit breaker combination according to claim 2, characterized in that: The second arc-striking plate (54) comprises an arc-shaped plate portion (541) and a partition portion (542) which form an arc-striking channel (5) together with the first arc-striking plate (53); a convex strip (543) is arranged on the arc-shaped plate portion (541) along the direction of the arc-striking channel (5) and toward the inside of the arc-striking channel (5); the partition portion (542) extends from a side of the arc-extinguishing chamber (4) away from the static contact (3) to the rear end of the arc-extinguishing chamber (4), and its width is greater than the width of the second arc-striking plate (54).

4. A reclosing circuit breaker combination according to claim 1, characterized in that: A mounting groove (71) is provided on a side of the arc isolation seat (7) facing away from the arc striking channel (5); the magnetic conductive plate (8) is arranged in the mounting groove (71); an arc isolation plate (72) is also arranged in the mounting groove (71); and the magnetic conductive plate (8) is arranged between the arc isolation seat (7) and the arc isolation plate (72).

5. A reclosing circuit breaker combination according to claim 4, characterized in that: The circuit breaker unit also includes a first shell (23), one end of the arc isolation seat (7) is provided with a connecting flange (10), the connecting flange (10) is provided with a first positioning hole (11), the first shell (23) is provided with a first positioning column (12) corresponding to the first positioning hole (11), a connecting column (13) is provided in the mounting groove (71), the connecting column (13) is provided with a second positioning hole (14) along the axial direction, the magnetic conductive plate (8) and the arc isolation plate (72) are provided with a through hole (15) for the connecting column (13) to pass through, and the first shell (23) is provided with a second positioning column (16) corresponding to the second positioning hole (14).

6. A reclosing circuit breaker combination according to claim 5, characterized in that: The first positioning hole (11) and the first positioning column (12) as well as the second positioning hole (14) and the second positioning column (16) are all located outside the arc striking channel (5).

7. A reclosing circuit breaker combination according to claim 3, characterized in that: The arc extinguishing chamber (4) is provided with a V-shaped arc striking opening (41) facing the arc striking channel (5), and the first arc striking plate (53) is provided with a V-shaped end (531), the V-shaped end (531) extends into the V-shaped arc striking opening (41), and the V-shaped end (531) is aligned with the central axis of the V-shaped arc striking opening (41), and the tip of the V-shaped end (531) is arranged in an arc shape.

8. A reclosing circuit breaker combination according to claim 7, characterized in that: The arc extinguishing chamber (4) comprises a fixed frame (42) and a plurality of arc extinguishing grids (43) arranged in parallel and at intervals on the fixed frame (42); a V-shaped first arc striking groove (431) is arranged on the arc extinguishing grid (43) towards the arc striking channel (5); a plurality of the V-shaped grooves form the V-shaped arc striking opening (41); a second arc striking groove (432) is arranged on the arc extinguishing grid (43) at the bottom end of the first arc striking groove (431); and the second arc striking groove (432) is arranged in a straight line.

9. A reclosing circuit breaker combination according to claim 1, characterized in that: The reclosing unit comprises a second housing (17), and a motor (18), a transmission gear set (19), a transmission member (20) and a circuit board (21) arranged in the second housing (17); the output shaft of the motor (18) is a worm (22); the worm (22) is meshed with the transmission gear set (19) for transmission; the transmission gear set (19) is meshed with the transmission member (20) for transmission; the transmission member (20) is connected to an operating handle (101) and rotates synchronously; the motor (18) is connected to the circuit board (21); and a control port and a feedback port are arranged on the circuit board (21).

10. A reclosing circuit breaker combination according to claim 9, characterized in that: The operating handle (101) is provided with a first linkage hole (102) extending therethrough in the axial direction, and the transmission member (20) is provided with a second linkage hole (201) coaxially with the first linkage hole (102); the first linkage hole (102) and the second linkage hole (201) are matching polygonal holes.

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