CN111354586A - Direct current heavy current breaking device - Google Patents

Abstract

The utility model provides a direct current heavy current disjunction device, it includes base (1), static contact (2) are installed on base (1), moving contact (3) dress on moving contact support (4), moving contact support (4) dress is on base (1), the plane that the joint of moving contact (3) and static contact (2) was located when breaking apart is the disjunction plane (S), its characterized in that: a pair of permanent magnets (6,6 ') are mounted on the permanent magnet mounting bracket (5), the pair of permanent magnets (6, 6') are respectively positioned above and below the dividing plane (S), the opposite surfaces of the pair of permanent magnets (6,6 ') have the same polarity, and the magnetizing direction (Q) of the pair of permanent magnets (6, 6') is perpendicular to the dividing plane (S). The technical scheme can not only realize the non-polar function, but also save the installation space and the permanent magnet material, and also reduce the product cost on the premise of ensuring the function.

Description

Direct current heavy current breaking device

Technical Field

The invention belongs to the technical field of low-voltage electricity, and particularly relates to a direct-current large-current breaking device.

Background

The words switch are to be interpreted as open and closed. It refers to an element that can open a circuit, interrupt a current, or cause it to flow to other circuits. The most common switches are electromechanical devices that are operated by a person, in which there are one or several contacts. The "closed" of a contact indicates that the contact is conductive, allowing current to flow; an "open" of the switch indicates that the contact is not conductive, creating an open circuit, and not allowing current to flow. The development history of switches has been developed from original knife switches requiring manual operation to modern intelligent switches used in various large electrical control devices, and the functions of the switches have been increased and the safety thereof has been improved, and a rotary switch is a common switch that prevents unauthorized operation of a rotary operating device by locking a rotary operator at a specific position corresponding to a specific state of the rotary operating device. Rotary disconnectors are widely used in electrical power systems, e.g. photovoltaic, wind power, etc. For example, in a photovoltaic system, the smaller currents generated in each photovoltaic cell are combined in parallel to provide the current or total power required by the utilization system.

One of the existing switches is an isolating switch, and the isolating switch usually adopts a rotary type or a translational type to realize the connection and the disconnection of a contact system, wherein the existing translational type contact system can only be used for switching on and disconnecting the loop control with lower voltage and lower power, and the electric arc generated in the switching-on and switching-off process of the switch is more and more difficult to extinguish along with the improvement of the use voltage, thereby seriously restricting the development of the direct current switch in the field of higher voltage use. As shown in fig. 1 and 2, in order to realize rapid extinction of an arc at a higher voltage, a conventional solution is to increase magnetic blow to blow off the arc by adding a permanent magnet, but in the conventional solution, a whole permanent magnet is adopted, and a parallel sectioning surface magnetizing manner is used to make a magnetic field perpendicular to a breaking current, so as to achieve the purpose of blowing off the arc, but the method occupies a large space and has a high cost.

Disclosure of Invention

The invention aims to provide a direct-current high-current breaking device aiming at the technical defect that a whole permanent magnet is adopted in the existing isolating switch, and the occupied space of a parallel section magnetizing mode is large, wherein the two permanent magnets are installed in an up-and-down opposite mode, the magnetizing direction is vertical to a breaking plane, the polarities of the two opposite sides of the two permanent magnets are consistent, the two permanent magnets are superposed on the breaking plane to generate a magnetic field component which is enough for breaking current by utilizing the principle that the same magnetic poles repel each other, the magnetic field direction of the component is vertical to the current flowing direction, so that an electric arc moves towards the direction parallel to the magnetizing direction of the permanent magnets, the current is finally broken, the breaking condition of the product is unrelated to the current flowing direction, namely the product has a non-polar function, and the whole technical scheme not only realizes the non-polar function of the product.

Technical scheme

In order to achieve the technical purpose, the invention provides a direct current large current breaking device, which comprises a base, a static contact is arranged on the base, a moving contact is arranged on a moving contact support, the moving contact support is arranged on the base, the connection and separation of the moving contact and the static contact realize the connection and disconnection of the breaking device, and the plane where the moving contact and the static contact are connected and disconnected is a breaking plane, and is characterized in that: the permanent magnet mounting support is mounted on the base, the pair of permanent magnets are mounted on the permanent magnet mounting support and are respectively located above and below the disjunction plane, the polarities of opposite surfaces of the pair of permanent magnets are the same, and the magnetizing direction of the pair of permanent magnets is perpendicular to the disjunction plane, so that the direction of magnetic blowing force, which is provided by the pair of permanent magnets and effectively acts on the disjunction electric arc, is parallel to the magnetizing direction.

Further, the pair of permanent magnets are respectively positioned on one sides, close to the static contact, above and below the breaking plane.

Preferably, the pair of permanent magnets are respectively arranged above and below the breaking plane and opposite to one side close to the static contact.

Further, the permanent magnet mounting bracket comprises a bracket body, the bracket body is arranged on the base, the static contact is clamped with the bracket body, and the pair of permanent magnets are respectively and correspondingly arranged in the permanent magnet grooves of the bracket body.

Advantageous effects

The invention provides a direct current large current breaking device, wherein two permanent magnets are installed in a vertically opposite mode, the magnetizing direction is vertical to a breaking plane, the polarities of the two permanent magnets in the opposite sides are consistent, the two permanent magnets are superposed on the breaking plane to generate a magnetic field component which is enough for breaking current by utilizing the principle that like magnetic poles repel each other, the direction of the magnetic field component is vertical to the current flow direction, further, an electric arc moves towards the direction parallel to the magnetizing direction of the permanent magnets, the current is finally broken, and the breaking condition of a product is unrelated to the current flow direction, namely, the product has a non-polar function. The scheme can not only realize the non-polar function, but also save the installation space and the permanent magnet material, and also reduce the product cost on the premise of ensuring the function.

Drawings

Fig. 1 is a schematic diagram of a magnetic mounting structure of a permanent magnet in a conventional switch.

Fig. 2 is a schematic diagram of the magnetizing direction of a permanent magnet in a conventional switch.

Fig. 3 is a schematic structural diagram of an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a permanent magnet mounting bracket in an embodiment of the invention.

Fig. 5 is a schematic structural diagram of a pair of permanent magnets in an embodiment of the present invention.

Fig. 6 is a schematic view of the magnetizing direction of the permanent magnet in the embodiment of the invention.

FIG. 7 is a schematic diagram of the magnetic blowing direction of the permanent magnet in the embodiment of the invention.

Detailed Description

The invention is further explained below with reference to the figures and examples.

Examples

As shown in fig. 3, a dc large current breaking device includes a base 1, a static contact 2 mounted on the base 1, a moving contact 3 mounted on the moving contact support 4, the moving contact support 4 mounted on the base 1 and capable of sliding, the moving contact 3 and the static contact 2 being connected and separated to achieve on/off of the breaking device, a plane where the moving contact 3 and the static contact 2 are connected and disconnected is a breaking plane S, wherein a permanent magnet mounting support 5 is mounted on the base 1, a pair of permanent magnets 6,6 'are mounted on the permanent magnet mounting support 5, and the pair of permanent magnets 6, 6' are respectively located above and below the breaking plane S and on a side close to the static contact 2. In this embodiment, the pair of permanent magnets 6, 6' are respectively disposed above and below the dividing plane S and opposite to the side close to the stationary contact 2. As shown in fig. 5, the opposite surfaces of the pair of permanent magnets 6,6 ' have the same polarity, and as shown in fig. 6 and 7, the magnetizing direction Q of the pair of permanent magnets 6,6 ' is perpendicular to the dividing plane S, so that the direction of the magnetic blowing force F provided by the pair of permanent magnets 6,6 ' and effectively acting on the divided arc is parallel to the magnetizing direction Q.

As shown in fig. 4, the permanent magnet mounting bracket 5 includes a bracket body 501, the bracket body 501 is mounted on the base 1, the stationary contact 2 is clamped with the bracket body 501, and the pair of permanent magnets 6,6 'are respectively and correspondingly mounted in the permanent magnet slots 501a,501 a' of the bracket body 501.

The principle of the embodiment is that when the current is divided, the current flows through the dividing plane S and generates an electric arc; the pair of permanent magnets 6,6 ' are installed in a vertically opposite mode, the magnetizing direction is parallel to the installing direction of the pair of permanent magnets 6,6 ', the polarities of the opposite sides of the pair of permanent magnets are consistent, the magnetic field components which are enough for breaking the current are generated at the breaking plane S by the pair of permanent magnets 6,6 ' by utilizing the principle that like magnetic poles repel each other, the direction of the magnetic field of the components is perpendicular to the current flowing direction, further, the electric arc moves towards the direction parallel to the magnetizing direction of the pair of permanent magnets, the current is finally broken, the breaking condition of the product is unrelated to the current flowing direction, and the product has a non-polarity function.

The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms such as "upper", "lower", "left", "right", "middle", "clockwise" and "counterclockwise" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the substantial changes, but also considered to be the scope of the present invention.

Claims (4)

1. A direct current heavy current breaking device comprises a base (1), a static contact (2) is installed on the base (1), a moving contact (3) is installed on a moving contact support (4), the moving contact support (4) is installed on the base (1), the moving contact (3) and the static contact (2) are connected and separated to achieve on-off of the breaking device, and a plane where the moving contact (3) and the static contact (2) are connected and separated is a breaking plane (S), and the direct current heavy current breaking device is characterized in that: a permanent magnet mounting bracket (5) is mounted on the base (1), a pair of permanent magnets (6,6 ') is mounted on the permanent magnet mounting bracket (5), the pair of permanent magnets (6,6 ') are respectively positioned above and below the disjunction plane (S), the opposite surfaces of the pair of permanent magnets (6,6 ') have the same polarity, and the magnetizing direction (Q) of the pair of permanent magnets (6,6 ') is vertical to the disjunction plane (S) so that the direction of the magnetic blowing force (F) provided by the pair of permanent magnets (6,6 ') and effectively acting on the disjunction electric arc is parallel to the magnetizing direction (Q).

2. A direct current large current breaking device according to claim 1, wherein: the pair of permanent magnets (6, 6') are respectively positioned on one side, close to the static contact (2), above and below the breaking plane (S).

3. A direct current large current breaking device according to claim 2, wherein: the pair of permanent magnets (6, 6') are respectively arranged above and below the breaking plane (S) and are opposite to one side close to the static contact (2).

4. A direct current large current breaking device according to claim 1, wherein: the permanent magnet mounting bracket (5) comprises a bracket body (501), the bracket body (501) is arranged on the base (1), the static contact (2) is clamped with the bracket body (501), and the pair of permanent magnets (6,6 ') are respectively and correspondingly arranged in permanent magnet grooves (501a,501 a') of the bracket body (501).

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