CN219370834U - Circuit breaking device - Google Patents

Abstract

The utility model relates to a circuit cutting device which comprises a shell, an excitation source, an impact piece, a conductive piece and an insulating isolation piece, wherein the conductive piece divides the interior of the shell into a first cavity and a second cavity; the excitation source is started under a preset condition and is used for providing primary power for the impact piece so that the impact piece impacts the conductive piece and the middle part of the conductive piece is disconnected, the disconnected part of the conductive piece has a trend of moving towards the second cavity, and the impact piece can be inserted into the insulating isolation piece; before the conductive member is disconnected, a gap is provided between the conductive member and the insulating spacer. Because the gap is reserved between the conductive piece and the insulating isolation piece before the conductive piece is disconnected, when the excitation source enables the impact piece to impact the conductive piece under the preset condition, two ends of the disconnected conductive piece can be rapidly separated, and the second cavity provides avoidance space for the disconnected conductive piece, so that the safety of electronic equipment of a circuit where the circuit cutting device is located is protected.

Description

Circuit breaking device

Technical Field

The utility model relates to the technical fields of electric power and new energy, in particular to a circuit cutting device.

Background

Along with the development of the technical fields of the electric power field and the new energy field, a circuit cutting device appears, in the traditional technology, the distance between two disconnected ends of a conductive piece is small, the generated arc temperature is high, the breaking time is long, and the damage to electronic equipment of a circuit where the circuit cutting device is located is easy to cause.

Disclosure of Invention

Based on this, it is necessary to provide a circuit breaking device.

The circuit cutting device comprises a shell, an excitation source, an impact piece, a conductive piece and an insulating isolation piece, wherein the conductive piece divides the interior of the shell into a first cavity and a second cavity, the excitation source is arranged on the shell, the impact piece is arranged in the first cavity, and the insulating isolation piece is arranged in the second cavity;

the excitation source is started under a preset condition and is used for providing primary power for the impact piece so that the impact piece impacts the conductive piece and breaks the middle part of the conductive piece, the breaking part of the conductive piece has a tendency to move towards the second cavity, and the impact piece can be inserted into the insulating isolation piece;

before the conductive member is disconnected, a gap is provided between the conductive member and the insulating spacer.

The device is characterized in that a gap is reserved between the conductive piece and the insulating isolation piece before the conductive piece is disconnected, so that when the conductive piece is impacted by the impact piece under the preset condition, two ends of the disconnected conductive piece can be rapidly separated, the second chamber provides avoidance space for the disconnected conductive piece, one part of impact force of the impact piece to the conductive piece is derived from the excitation source, the other part of impact force is derived from the gravity of the impact piece, the conductive piece can be ensured to be disconnected by the impact piece under the preset condition, the time for the disconnection of the conductive piece by the impact piece and the time for the movement of the impact piece are shortened, and the safety of electronic equipment of a circuit where the circuit cutting device is located is protected.

In one embodiment, the second chamber comprises a wide cavity and a first narrow cavity, the radial dimension of the wide cavity is larger than that of the first narrow cavity, the wide cavity is communicated with the first narrow cavity and is located at one side of the first narrow cavity relatively far away from the first chamber, and the insulating spacer is arranged in the wide cavity and stretches into the first narrow cavity.

So set up, wide chamber and first narrow chamber can provide sufficient arc extinguishing space for the electrically conductive piece of disconnection, when the electrically conductive piece is disconnected by the impact member, the electric arc at electrically conductive piece both ends is kept apart by the tip in first narrow chamber of insulating isolation piece towards the protruding one end of first cavity, can avoid circuit breaker to appear the phenomenon of breaking down, shortens insulating isolation piece and the time of impact member grafting simultaneously, improves the security of the circuit of the required protection of circuit breaker.

In one embodiment, the second chamber further comprises a second narrow cavity between the first narrow cavity and the wide cavity, the wide cavity being in communication with the first narrow cavity through the second narrow cavity, the insulating spacer extending from the wide cavity into the first narrow cavity through the second narrow cavity; the peripheral wall of the second narrow cavity forms an inward protruding bulge in the shell;

when the impact piece is inserted into the insulating isolation piece, a first narrow slit for promoting arc extinction is formed between the impact piece and the protrusion.

So set up, when the impact member breaks the conducting element, the protruding tip that can the butt disconnection of the perisporium of second narrow chamber in the casing, avoid the conducting element of disconnection to get into in the wide chamber, reduce the temperature in wide chamber, protruding can prolong the electric arc simultaneously, shorten the time of extinguishing the arc, when the impact member pegged graft in insulating isolation piece, first narrow slit can improve circuit breaker's extinction efficiency.

In one embodiment, the conductive member is broken to form two sections, the two sections of the conductive member are respectively bent towards the second cavity, and the height of the first narrow cavity is matched with the bending length of the conductive member towards the second cavity.

So set up, when electrically conductive piece is broken by the impact member, the electric arc can begin creepage along protruding, and the creepage distance of extension electric arc, first narrow chamber can provide sufficient accommodation space for the electrically conductive piece of disconnection, avoids electrically conductive piece to drop into wide chamber in, reduces the temperature of wide chamber when the arc extinction, shortens the time of extinguishing.

In one embodiment, the width of the protrusion protruding into the housing is less than or equal to the thickness of the conductive member.

When the impact piece breaks the conductive piece, the width reserved for the conductive piece is raised, the broken conductive piece can be prevented from blocking the radial movement of the impact piece, the time of the radial movement of the impact piece is shortened, and the reliability of the circuit cutting device is improved.

In one embodiment, the wide cavity is filled with quartz sand or arc extinguishing wires.

The arrangement shortens the arc extinguishing time, improves the arc extinguishing efficiency of the circuit cutting device and improves the safety of the circuit; after the impact piece breaks the conductive piece, the filling material in the wide cavity can play a buffering role for the impact piece which rapidly descends, so that the rapid temperature rise of the shell is avoided.

In one embodiment, the impact member is provided with at least two inserting grooves, and the two inserting grooves are arranged in parallel and extend along the movement direction of the impact member; the number and the positions of the insulating spacers are matched with those of the inserting grooves; when the impact piece is inserted into the insulating isolation piece, a second narrow slit for promoting arc extinction is formed between the impact piece and the insulating isolation piece.

So set up, the second narrow slit can improve circuit breaker's arc extinguishing effect, and the cooperation can prolong electric arc between impact member and the insulating isolation piece to reduce circuit breaker's temperature when the arc extinguishing, improve circuit breaker's protection effect to the circuit.

In one embodiment, the impingement member is provided with a guiding ramp for guiding the arc to the second slot.

The arc extinguishing path of the second narrow slit can be prolonged through the guide inclined plane, meanwhile, the arc can be guided to the second narrow slit through the guide inclined plane, the arc after the conductive piece is disconnected is prolonged, and the breaking time is shortened.

In one embodiment, a first pre-break and a second pre-break are provided in the middle of the conductive member, the first pre-break is provided on one side of the conductive member facing the first chamber, the second pre-break is provided on one side of the conductive member facing the second chamber, and the first pre-break and the second pre-break are provided corresponding to each other.

When the excitation source is started under the preset condition, the first pre-fracture and the second pre-fracture are correspondingly arranged when the impact piece impacts the conductive piece, so that the time required by breaking the conductive piece can be shortened, the arc extinguishing time is shortened, the temperature of the wide cavity during arc extinguishing is reduced, and a circuit protected by the circuit breaking device is protected.

In one embodiment, the first pre-break and/or the second pre-break are V-shaped.

By the arrangement, the first pre-fracture and the second pre-fracture of the conductive piece can be rapidly disconnected when impacted by the impact piece, so that the time required by the impact piece to break the conductive piece is shortened, and the time before an arc is shortened.

In one embodiment, the number of the plugging grooves is two, and the two plugging grooves are respectively positioned at two sides of the first pre-fracture.

When the impact piece impacts the conductive piece, the gas in the plugging groove can form dynamic pressure on the first pre-break, so that the first pre-break is quickly broken, the time required by breaking the conductive piece is shortened, the time before arc is shortened, and the sensitivity of the circuit cutting device is improved.

Drawings

FIG. 1 is a schematic diagram of a circuit breaking device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a full section of the circuit breaking device with A-A as a section line when the conductive member in FIG. 1 is not broken;

FIG. 3 is a schematic view of a partial enlarged structure at B in FIG. 2;

FIG. 4 is a schematic diagram of the circuit breaking device in full section with A-A as a section line after the conductive member in FIG. 1 is broken;

FIG. 5 is a schematic view of a partial enlarged structure at C in FIG. 4;

FIG. 6 is a schematic view of the impingement member of FIG. 1;

fig. 7 is a schematic view of the structure of fig. 6 at another view angle.

Reference numerals:

100. a circuit breaking device; 10. a housing; 11. a first chamber; 12. a second chamber; 121. a wide cavity; 122. a first narrow cavity; 123. a second narrow cavity; 13. a protrusion; 20. an excitation source; 30. an impact member; 31. a plug-in groove; 32. a guide slope; 40. a conductive member; 41. a first pre-break; 42. a second pre-break; 50. an insulating spacer; 1. a first slot; 2. and a second slit.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Along with the development of the technical fields of the electric power field and the new energy field, a circuit cutting device appears, in the traditional technology, the distance between two disconnected ends of a conductive piece is small, the generated arc temperature is high, the breaking time is long, and the damage to electronic equipment of a circuit where the circuit cutting device is located is easy to cause.

Based on this, it is necessary to provide the circuit breaking device 100.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a circuit breaking apparatus 100 according to an embodiment of the utility model.

Referring to fig. 2 to 7, the circuit breaking device includes a housing 10, an excitation source 20, an impact member 30, a conductive member 40 and an insulating spacer 50, wherein the conductive member 40 divides the interior of the housing 10 into a first chamber 11 and a second chamber 12, the excitation source 20 is mounted on the housing 10, the impact member 30 is disposed in the first chamber 11, and the insulating spacer 50 is disposed in the second chamber 12;

the excitation source 20 is started under a preset condition, the excitation source 20 is used for providing initial power for the impact piece 30 so that the impact piece 30 impacts the conductive piece 40 and the middle part of the conductive piece 40 is disconnected, the disconnected part of the conductive piece 40 has a tendency to move towards the second cavity 12, and the impact piece 30 can be inserted into the insulating spacer 50;

before the conductive member 40 is disconnected, there is a gap between the conductive member 40 and the insulating spacer 50.

By means of the arrangement, a gap is reserved between the conductive piece 40 and the insulating spacer 50 before the conductive piece 40 is disconnected, so that when the conductive piece 40 is impacted by the impact piece 30 under the preset condition, two ends of the disconnected conductive piece 40 can be quickly separated, the second chamber 12 provides avoidance space for the disconnected conductive piece 40, one part of impact force of the impact piece 30 on the conductive piece 40 is derived from the excitation source 20, the other part of impact force is derived from the gravity of the impact piece 30, the conductive piece 40 can be ensured to be disconnected by the impact piece 30 under the preset condition, the time for the disconnection of the conductive piece 40 by the impact piece 30 and the time for the movement of the impact piece 30 are shortened, and the safety of electronic equipment of a circuit where the circuit breaking device 100 is located is protected.

Referring to fig. 2, in one embodiment, the second chamber 12 includes a wide chamber 121 and a first narrow chamber 122, the radial dimension of the wide chamber 121 is larger than the radial dimension of the first narrow chamber 122, the wide chamber 121 is connected to the first narrow chamber 122 and located at a side of the first narrow chamber 122 relatively far from the first chamber 11, and the insulating spacer 50 is disposed in the wide chamber 121 and extends into the first narrow chamber 122.

So set up, wide chamber 121 and first narrow chamber 122 can provide sufficient arc extinguishing space for disconnected electrically conductive spare 40, when electrically conductive spare 40 is broken by impact member 30, the electric arc at electrically conductive spare 40 both ends is kept apart by insulating isolation piece 50 protruding the tip in first narrow chamber 122 towards the one end of first cavity 11, can avoid circuit breaker 100 to appear the phenomenon of breaking down, shortens insulating isolation piece 50 and impact member 30 grafting time simultaneously, improves the security of the circuit that circuit breaker 100 needs to protect.

It will be appreciated that the radial dimension of the wide cavity 121 is greater than the radial dimension of the first narrow cavity 122, which in this embodiment is implemented such that the direction of impact of the impact member 30 against the conductive member 40 is radial.

Alternatively, in the present embodiment, the insulating spacer 50 is disposed in the wide cavity 121 and extends into the first narrow cavity 122, and in other embodiments of the present application, the insulating spacer 50 may be disposed in the wide cavity 121 near the first narrow cavity 122, as long as the circuit breaking device 100 can secure the circuit to be protected.

Alternatively, in the present embodiment, the radial dimension of the wide cavity 121 is implemented to be larger than the radial dimension of the first narrow cavity 122, and in other embodiments of the present application, the radial dimension of the wide cavity 121 may be implemented to be smaller than or equal to the radial dimension of the first narrow cavity 122, as long as the circuit breaking device 100 can function as a protection circuit.

Referring to fig. 2 and 4, in one embodiment, the second chamber 12 further includes a second narrow cavity 123, the second narrow cavity 123 is located between the first narrow cavity 122 and the wide cavity 121, the wide cavity 121 is communicated with the first narrow cavity 122 through the second narrow cavity 123, and the insulating spacer 50 extends from the wide cavity 121 into the first narrow cavity 122 through the second narrow cavity 123; the peripheral wall of the second narrow cavity 123 forms an inwardly protruding protrusion 13 within the housing 10;

when the impact member 30 is inserted into the insulating spacer 50, a first slit 1 for promoting arc extinction is formed between the impact member 30 and the protrusion 13.

So set up, when the impact member 30 breaks the conductive member 40, the protruding 13 of the peripheral wall of the second narrow cavity 123 in the housing 10 can butt against the end of the broken conductive member 40, avoid the broken conductive member 40 to enter the wide cavity 121, reduce the temperature of the wide cavity 121, meanwhile the protruding 13 can lengthen the arc, shorten the arc extinguishing time, and when the impact member 30 is inserted in the insulating spacer 50, the first narrow slit 1 can improve the arc extinguishing efficiency of the circuit breaking device 100.

It will be appreciated that in this embodiment, the protrusions 13 are able to provide a smooth path of movement for the radial movement of the strike 30, avoiding the broken conductive element 40 affecting the radial movement of the strike.

Alternatively, in the present embodiment, the peripheral wall of the second narrow cavity 123 is implemented to form the protrusion 13 protruding inward in the housing 10, and the protrusion 13 is a convex ring and is disposed around the peripheral wall of the second narrow cavity 123, and in other embodiments of the present application, the protrusion 13 may be implemented as a bump, as long as the protrusion 13 can prevent the two broken ends of the conductive element 40 from falling into the wide cavity 121 after the conductive element 40 is broken down by the impact element 30.

Referring to fig. 4 to 5, in one embodiment, after the conductive member 40 is broken, two sections of conductive members 40 are formed, and the two sections of conductive members 40 are respectively bent toward the second chamber 12, and the height of the first narrow cavity 122 is matched with the bending length of the conductive members 40 toward the second chamber 12.

So set up, when electrically conductive spare 40 is broken by strike 30, the electric arc can begin the creepage along protruding 13, and the creepage distance of extension electric arc, first narrow chamber 122 can provide sufficient accommodation space for disconnected electrically conductive spare 40, avoids electrically conductive spare 40 to fall into wide chamber 121, reduces the temperature of wide chamber 121 when the arc extinction, shortens the time of extinguishing the arc.

Alternatively, in the present embodiment, the height of the first narrow cavity 122 is implemented to match the bending length of the conductive element 40 towards the second cavity 12, and in other embodiments of the present application, the height of the first narrow cavity 122 may be implemented to be greater than the bending length of the conductive element 40 towards the second cavity 12, so long as the first narrow cavity 122 can provide sufficient accommodating space for the broken conductive element 40.

Referring to fig. 4 to 5, in one embodiment, the width of the protrusion 13 protruding into the housing 10 is smaller than or equal to the thickness of the conductive member 40.

So set up, when the conducting piece 40 that the impact piece 30 was broken, the protruding 13 can avoid the radial motion of impact piece 30 to the conducting piece 40 that breaks for the width that conducting piece 40 reserved, shortens the time of impact piece 30 radial motion, improves the reliability of circuit breaker 100.

Alternatively, in the present embodiment, the length of the protrusion 13 is smaller than or equal to the width of the conductive member 40, and in other embodiments of the present application, the length of the protrusion 13 may be larger than the width of the conductive member 40, as long as the protrusion 13 can avoid the broken conductive member 40 from obstructing or affecting the radial movement of the impact member 30.

It will be appreciated that in this embodiment, the radial direction is implemented such that when the excitation source 20 is activated under a preset condition, the movement direction of the impact member 30 after the impact member 30 has the initial force is radial, and the movement of the impact member 30 in the radial direction is radial movement.

Referring to fig. 1 to 5, in one embodiment, the wide cavity 121 is filled with quartz sand or arc suppressing wires.

By the arrangement, the arc extinguishing time is shortened, the arc extinguishing efficiency of the circuit cutting device 100 is improved, and the safety of a circuit is improved; after the impact member 30 breaks the conductive member 40, the filling material in the wide cavity 121 can play a role in buffering the impact member 30 which rapidly descends, so as to avoid rapid temperature rise of the housing 10.

Alternatively, in the present embodiment, the material filled in the wide cavity 121 is implemented as quartz sand or arc extinguishing wire, and in other embodiments of the present application, the material filled in the wide cavity 121 may be implemented as aluminum oxide sand, so long as the arc extinguishing effect of the circuit breaking device 100 can be improved.

Alternatively, in the present embodiment, the inside of the wide cavity 121 is filled with quartz sand or arc extinguishing wires, and in other embodiments of the present application, the inside of the wide cavity 121 may be filled with quartz sand or arc extinguishing wires, as long as the arc extinguishing effect of the circuit breaking device 100 can be improved.

Referring to fig. 1 to 3, in one embodiment, at least two inserting grooves 31 are formed on the impact member 30, and the two inserting grooves 31 are arranged in parallel and extend along the moving direction of the impact member 30; at least two insulating spacers 50 are arranged, and the number and the positions of the insulating spacers 50 are matched with those of the inserting grooves 31; when the impact piece 30 is inserted into the insulating spacer 50, a second narrow slit 2 for promoting arc extinction is formed between the impact piece 30 and the insulating spacer 50.

In this way, the second slit 2 can improve the arc extinguishing effect of the circuit breaker 100, and the cooperation between the impact member 30 and the insulating spacer 50 can lengthen the arc, thereby reducing the temperature of the circuit breaker 100 during arc extinguishing and improving the protection effect of the circuit breaker 100 on the circuit.

Alternatively, the number of the plugging grooves 31 is implemented as two in the present embodiment, and in other embodiments of the present application, the number of the plugging grooves 31 may be implemented as more than two or less than two, as long as the circuit breaking device 100 is capable of protecting a circuit.

Alternatively, the number of the insulating spacers 50 is implemented as two in the present embodiment, and in other embodiments of the present application, the number of the insulating spacers 50 may be implemented as more than two or less than two, as long as the circuit breaking device 100 is capable of protecting a circuit.

Referring to fig. 3 and 5, in one embodiment, the impact member 30 is provided with a guiding inclined surface 32, and the guiding inclined surface 32 is used to guide the arc to the second slit 2.

By the arrangement, the guiding inclined plane 32 can prolong the arc extinguishing path of the second narrow slit 2, meanwhile, the guiding inclined plane 32 can guide the arc to the second narrow slit 2, the arc after the conductive piece 40 is disconnected is prolonged, and the breaking time is shortened.

Alternatively, in the present embodiment, the impact member 30 is implemented with two guiding inclined surfaces 32, and in other embodiments of the present application, the number of wire inclined surfaces on the impact member 30 may be implemented with one or more than two, so long as the arc extinguishing path can be prolonged.

Alternatively, in the present embodiment, the two guiding inclined surfaces 32 on the impact member 30 are implemented in an inclined manner, and the included angle between the two guiding inclined surfaces 32 is implemented to be greater than 30 ° and less than 90 °, and in other embodiments of the present application, the included angle between the two guiding inclined surfaces 32 on the impact member 30 may be implemented to be less than 30 ° or greater than 90 °, as long as the circuit breaking device 100 is capable of protecting a circuit.

Referring to fig. 1 to 3, in one embodiment, a first pre-break 41 and a second pre-break 42 are formed in the middle of the conductive member 40, the first pre-break 41 is formed on a side of the conductive member 40 facing the first chamber 11, the second pre-break 42 is formed on a side of the conductive member 40 facing the second chamber 12, and the first pre-break 41 and the second pre-break 42 are disposed correspondingly.

So configured, when the excitation source 20 is started under a preset condition, the first pre-break 41 and the second pre-break 42 are correspondingly configured to shorten the time required for breaking the conductive member 40, thereby shortening the arc extinguishing time, reducing the temperature of the wide cavity 121 during arc extinguishing, and protecting the circuit protected by the circuit breaking device 100.

Alternatively, in the present embodiment, the first pre-break 41 is implemented to be disposed corresponding to the second pre-break 42, and in other embodiments of the present application, the first pre-break 41 may be implemented to be disposed interlaced with the second pre-break 42, so long as the impact member 30 can rapidly break the conductive member 40 when the excitation source 20 is activated under a preset condition.

Alternatively, in the present embodiment, the middle portion of the conductive element 40 is configured to be provided with the first pre-break 41 and the second pre-break 42, and in other embodiments of the present application, the first pre-break 41 and the second pre-break 42 may be configured to be provided near the middle portion of the conductive element 40, so long as the excitation source 20 is activated under a preset condition, and the impact element 30 can quickly break the conductive element 40.

Referring to fig. 3, in one embodiment, the first pre-break 41 and/or the second pre-break 42 are V-shaped.

By this arrangement, the first and second pre-breaks 41 and 42 of the conductive member 40 can be rapidly opened when being impacted by the impact member 30, so that the time required for breaking the conductive member 40 by the impact member 30 can be shortened, and the time before the arc can be shortened.

Alternatively, in the present embodiment, the first pre-break 41 and/or the second pre-break 42 are implemented as V-shapes, and in other embodiments of the present application, the first pre-break 41 and/or the second pre-break 42 may be implemented as U-shapes or square shapes, as long as the impact member 30 can rapidly break the conductive member 40 when the excitation source 20 is activated under preset conditions.

Alternatively, in the present embodiment, the first pre-break 41 and/or the second pre-break 42 are implemented to have the same shape, and in other embodiments of the present application, the first pre-break 41 and/or the second pre-break 42 may be implemented to have a different shape, so long as the impact member 30 can quickly break the conductive member 40 when the excitation source 20 is activated under the preset condition.

Referring to fig. 3, in one embodiment, the number of the plugging slots 31 is two, and the two plugging slots 31 are respectively located at two sides of the first pre-break 41.

When the impact member 30 impacts the conductive member 40, the gas in the plugging slot 31 can form dynamic pressure on the first pre-break 41, so that the first pre-break 41 is rapidly broken, the time required for breaking the conductive member 40 is shortened, the time before arc is shortened, and the sensitivity of the circuit breaking device 100 is improved.

Alternatively, in the present embodiment, the two plugging grooves 31 are implemented to be located at two sides of the first pre-break 41, respectively, and in other embodiments of the present application, the two plugging grooves 31 may be implemented to be close to or far from the first pre-break 41, as long as the impact member 30 can quickly break the conductive member 40 when the excitation source 20 is activated under a preset condition.

It can be appreciated that in the present embodiment, the circuit breaking device 100 can adapt to a wide circuit voltage range, for example, a high voltage circuit and a low voltage circuit, and the internal space of the circuit breaking device 100 in the present embodiment is compact, the installation space required for the circuit breaking device 100 is small, and the adaptability of the circuit breaking device 100 is improved.

It will be appreciated that in this embodiment, the circuit breaking device 100 is an energized fuse device, which has controllability and is capable of breaking a circuit in a desired design configuration; the circuit breaking device 100 has higher insulation strength, wherein the electric arc generated after the conductive member 40 is broken is effectively prolonged by the second narrow slit 2, and the electric arc and other structural designs for bending and extending enable the device to be miniaturized.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The circuit cutting device is characterized by comprising a shell, an excitation source, an impact piece, a conductive piece and an insulating isolation piece, wherein the conductive piece divides the interior of the shell into a first cavity and a second cavity, the excitation source is arranged on the shell, the impact piece is arranged in the first cavity, and the insulating isolation piece is arranged in the second cavity;

the excitation source is started under a preset condition and is used for providing primary power for the impact piece so that the impact piece impacts the conductive piece and breaks the middle part of the conductive piece, the breaking part of the conductive piece has a tendency to move towards the second cavity, and the impact piece can be inserted into the insulating isolation piece;

before the conductive member is disconnected, a gap is provided between the conductive member and the insulating spacer.

2. The circuit interrupting device of claim 1 wherein said second chamber comprises a wide chamber and a first narrow chamber, said wide chamber having a radial dimension greater than a radial dimension of said first narrow chamber, said wide chamber communicating with said first narrow chamber and on a side of said first narrow chamber relatively remote from said first chamber, said insulating spacer disposed within said wide chamber and extending into said first narrow chamber.

3. The circuit interrupting device of claim 2 wherein said second chamber further comprises a second narrow cavity between said first narrow cavity and said wide cavity, said wide cavity communicating with said first narrow cavity through said second narrow cavity, said insulating spacer extending from said wide cavity into said first narrow cavity through said second narrow cavity; the peripheral wall of the second narrow cavity forms an inward protruding bulge in the shell;

when the impact piece is inserted into the insulating isolation piece, a first narrow slit for promoting arc extinction is formed between the impact piece and the protrusion.

4. A circuit breaking device according to claim 3, wherein the conductive member is broken to form two sections, the two sections of the conductive member are respectively bent towards the second chamber, and the height of the first narrow cavity is matched with the bending length of the conductive member towards the second chamber.

5. The circuit interrupting device of claim 4 wherein the protrusion protrudes into the housing a width less than or equal to the thickness of the conductive member.

6. The circuit breaking device according to any one of claims 2 to 5, wherein the wide cavity is filled with quartz sand or arc suppressing wires.

7. The circuit breaking device according to claim 1, wherein the impact member is provided with at least two insertion grooves, the two insertion grooves being arranged in parallel and extending in the movement direction of the impact member; the number and the positions of the insulating spacers are matched with those of the inserting grooves; when the impact piece is inserted into the insulating isolation piece, a second narrow slit for promoting arc extinction is formed between the impact piece and the insulating isolation piece.

8. The circuit interrupting device of claim 7 wherein said strike member has a guide ramp disposed thereon for guiding an arc to said second slot.

9. The circuit interrupting device of claim 7 wherein a first pre-break and a second pre-break are provided in the middle of the conductive member, the first pre-break is provided on a side of the conductive member facing the first chamber, the second pre-break is provided on a side of the conductive member facing the second chamber, and the first pre-break and the second pre-break are provided in correspondence.

10. The circuit interrupting device of claim 9 wherein the first pre-break and/or the second pre-break is V-shaped; and/or the number of the groups of groups,

the number of the inserting grooves is two, and the two inserting grooves are respectively positioned at two sides of the first pre-fracture.