Protective structure of electric appliance switch

Abstract

The utility model provides a protective structure of an electric appliance switch, which is characterized in that a first wiring terminal protective cover and a second wiring terminal protective cover are provided with a first wiring terminal guide piece and a second wiring terminal guide piece which are matched with a first guide groove and a third guide groove, and a metal filter screen is arranged in a protective cover shell along a metal filter screen mounting groove; a clamping protrusion arranged outside a protective cover shell is connected with a clamping groove in a matched mode to form an arc spraying opening set protective cover, a first arc spraying opening guide piece, a second arc spraying opening guide piece, a first wiring terminal guide piece and a second wiring terminal guide piece are connected with a first guide groove and a third guide groove in a matched mode respectively, and an interphase isolation plate penetrates through a groove in the middle of an arc spraying opening. The isolation guiding piece is connected with the second guiding groove in a matched mode, so that compatibility is good, installation is achieved through an existing accessory installation groove of an electric appliance switch, the size is small, meanwhile, an arc spraying opening is completely wrapped, the height does not exceed a wiring terminal, and the isolation piece and the phase-to-phase isolation plate can be independently installed on the premise that the fixed installation sequence is followed.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical switch accessories, in particular to a protective structure of an electrical switch. Background Art

[0002] The protective covers of circuit breakers and disconnectors are mainly used to block arc gas, eliminate arcing, and avoid short circuits, so as to protect distribution boxes and other equipment and personnel. They are important accessories for circuit breakers and disconnectors.

[0003] The air outlet of plastic case circuit breakers and disconnectors is often located near the terminal blocks. A simple filter structure is usually installed inside the air outlet to eliminate or suppress arcing under traditional interruption indicators. However, under the new high voltage and high current indicators:

[0004] If there is no terminal protection cover, as the disconnected high-temperature gas is ejected from the adjacent outlet, the air resistance decreases, and breakdown between the terminal and the particle-rich high-temperature gas is likely to occur.

[0005] Without an air outlet protective cover, it is often difficult to achieve zero arcing disconnection relying solely on the ion-eliminating structure inside the air outlet: the high-temperature gas rich in particles ejected during disconnection can easily short-circuit the arc extinguishing chamber inside the product with metal objects such as external distribution cabinets. Utility Model Content

[0006] The purpose of the utility model is to protect the arc spraying position of the electrical switch to achieve the protection effect of eliminating arc flashover and avoid the potential short circuit problem of the connection terminal.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present utility model provides a protective structure of an electrical switch, wherein the electrical switch includes a terminal group, an arc nozzle group located downstream of the terminal group, and an interphase isolation plate; the terminal group includes a first terminal and a second terminal arranged with the first terminal, the arc nozzle group includes a first arc nozzle and a second arc nozzle arranged horizontally with the first arc nozzle, grooves are provided on both sides of the terminal group and the arc nozzle group, forming a first guide groove and a third guide groove respectively, grooves are provided between the first terminal and the second terminal and between the first arc nozzle and the second arc nozzle, forming a second guide groove; an isolation guide is provided on one side of the interphase isolation plate to cooperate with the second guide groove.

[0008] The protective structure includes a first terminal protection cover, a second terminal protection cover and an arc spray port group protection cover;

[0009] The arc spray port group protective cover includes: a protective cover shell, a metal filter screen built into the protective cover shell, and a protective cover base located at the lower part of the protective cover shell. The protective cover shell is provided with a first arc spray port guide and a second arc spray port guide that respectively cooperate with the first guide groove and the third guide groove. The interior of the protective cover shell is provided with a metal filter screen mounting groove that cooperates with the edge of the metal filter screen. The middle of the protective cover shell is provided with a central arc spray port groove that cooperates with the isolation guide. The exterior of the protective cover shell is provided with a snap-fit ​​protrusion toward the protective cover base, and the snap-fit ​​protrusion is connected with the snap-fit ​​groove provided on the protective cover base.

[0010] The first terminal protection cover and the second terminal protection cover are respectively provided with a first terminal guide and a second terminal guide that match the first guide groove and the third guide groove;

[0011] The metal filter is installed inside the protective cover shell along the metal filter installation groove. The snap-fit ​​protrusion and the snap-fit ​​groove are connected to form the arc spray port group protective cover. The first arc spray port guide, the second arc spray port guide, the first terminal guide and the second terminal guide are respectively connected to the first guide groove and the third guide groove. The phase isolation plate passes through the middle groove of the arc spray port, and the isolation guide is connected to the second guide groove.

[0012] Preferably, the first terminal protection cover and the second terminal protection cover form a terminal middle groove, which is located upstream of the arc spray port middle groove.

[0013] Preferably, a bolt hole is provided inside the protective cover shell, and a bolt through hole is provided in the protective cover base. Bolts pass through the bolt hole and the bolt through hole to connect the protective cover shell and the protective cover base.

[0014] Preferably, the protective cover shell is provided with a clamping space, and the protective cover base is provided with a clamping hook, and the protective cover shell and the protective cover base are connected through the clamping space and the clamping hook.

[0015] Preferably, a plurality of filter gas exhaust holes are provided on the back of the protective cover shell.

[0016] The utility model proposes a protective structure for an electrical switch. The protective structure has good compatibility and is installed using the existing accessory mounting slot of the electrical switch. It is compact in size and completely wraps the arc spray port. The height does not exceed the wiring terminal. It can be installed independently from the phase isolation plate under the premise of following a fixed installation sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an existing electrical switch;

[0018] Figure 2 A schematic diagram of the exploded structure of a bolt-fixed arc spray nozzle protective cover provided in an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the arc nozzle protective cover base and the arc nozzle protective cover metal filter screen in the bolt-fixed arc nozzle protective cover provided in an embodiment of the utility model;

[0020] Figure 4 An overall schematic diagram of a bolt-fixed arc spray port protective cover provided in an embodiment of the present utility model;

[0021] Figure 5 The structural decomposition and overall schematic diagram of the snap-on arc spray port protective cover provided in the embodiment of the utility model;

[0022] Figure 6 This is an overall schematic diagram of the snap-on arc spray port protective cover provided in an embodiment of the present utility model;

[0023] Figure 7 An overall schematic diagram of an electrical switch for installing a bolt-fixed arc spray outlet protective cover provided in an embodiment of the present utility model;

[0024] Figure 8 A schematic diagram of the partial principle of arc elimination for an electrical switch with a bolt-fixed arc spray port protective cover provided in an embodiment of the present invention;

[0025] Figure 9 A schematic diagram of a terminal block protective cover structural assembly provided by an embodiment of the present utility model;

[0026] Figure 10 An overall schematic diagram of an electrical switch with a terminal block protective cover structural assembly installed, provided by an embodiment of the present invention;

[0027] Figure 11 Schematic diagram of the exploded installation of the bolt-fixed arc nozzle protective cover, interphase isolation plate, terminal protection cover and electrical switch combination provided in an embodiment of the present invention;

[0028] Figure 12 (a) is a front view schematic diagram of the overall schematic diagram of the electrical switch with the protective structure and the phase isolation plate provided by the embodiment of the present utility model;

[0029] Figure 12 (b) is a top view schematic diagram of the overall schematic diagram of the electrical switch after adopting the protective structure and the phase isolation plate provided by the embodiment of the present utility model. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that such equivalents also fall within the scope of the claims appended hereto.

[0031] like Figures 1-12 As shown, the electrical switch includes a terminal group 2, an arc nozzle group 1 located downstream of the terminal group 2, and an interphase isolation plate 6; the terminal group 2 includes a first terminal and a second terminal arranged with the first terminal, the arc nozzle group includes a first arc nozzle and a second arc nozzle arranged horizontally with the first arc nozzle, and grooves are provided on both sides of the terminal group 2 and the arc nozzle group 1 to form a first guide groove 31 and a third guide groove 33 respectively. Grooves are provided between the first terminal and the second terminal and between the first arc nozzle and the second arc nozzle to form a second guide groove 32; an isolation guide member 61 is provided on one side of the interphase isolation plate 6 to cooperate with the second guide groove 32, and the first guide groove 31, the second guide groove 32 and the third guide groove 33 constitute the guide groove group 3.

[0032] The utility model provides a protective structure for an electrical switch, comprising a first terminal protection cover 52, a second terminal protection cover 51 and an arc spray port group protection cover 4. The first terminal protection cover 52 and the second terminal protection cover 51 constitute a terminal protection cover group 5.

[0033] The arc nozzle assembly shield 4 includes a shield housing 41, a metal filter 42 built into the shield housing 41, and a shield base 43 located at the bottom of the shield housing. The shield housing 41 is provided with a first arc nozzle guide 411 and a second arc nozzle guide 412 that respectively cooperate with the first guide groove 31 and the third guide groove 33. The shield housing 41 is internally provided with a metal filter mounting groove 414 that cooperates with the edge of the metal filter 42. The shield housing 41 is centrally provided with a central arc nozzle groove 413 that cooperates with the isolation guide 61. The shield housing 41 is externally provided with a snap-fit ​​protrusion 415 facing the shield base 43. The snap-fit ​​protrusion 415 is engaged with the snap-fit ​​groove 432 provided on the shield base 43.

[0034] The utility model provides a bolt-fixed arc spray mouth protective cover, wherein the protective cover shell 41 is provided with a bolt hole inside, the protective cover base 43 is provided with a bolt through hole 431, and the bolt 44 passes through the bolt hole and the bolt through hole 431 to connect the protective cover shell 41 and the protective cover base 43. Figure 3 (a) is a schematic structural diagram of the shield base 43 of the bolt-fixed arc nozzle shield.

[0035] The present invention also provides a snap-on arc spray port protective cover, wherein the protective cover shell 41 is provided with a clamping space 416 , and the protective cover base 43 is provided with a hook 433 . The protective cover shell 41 and the protective cover base 43 are connected by the clamping space 416 and the hook 433 .

[0036] The back of the protective cover shell 41 is provided with a plurality of filter gas exhaust holes, and the surface of the metal filter 42 is provided with a plurality of filter through holes for filtering gas, and the diameter of the filter gas exhaust holes is greater than or equal to the diameter of the filter through holes. Figure 3 (b) is a schematic diagram of the structure of the metal filter 42.

[0037] The first terminal shield 51 and the second terminal shield 52 are respectively provided with a first terminal guide 511 and a second terminal guide 521 that cooperate with the first guide groove 31 and the third guide groove 33. The first terminal shield 51 and the second terminal shield 52 form a central groove of the terminal, which is located upstream of the central groove of the arc spray port. Figure 9 (a) is a schematic diagram of the top view of the second terminal protection cover 52, Figure 9 (b) is a schematic diagram of the top view of the first terminal protection cover 51. Figure 9 (c) is a schematic diagram of the bottom view of the second terminal protection cover 52. Figure 9 (d) is a schematic diagram of the structure of the first terminal protection cover 51 when viewed from above.

[0038] The metal filter 42 is installed inside the protective cover shell 41 along the metal filter installation groove 414, and the snap-fit ​​protrusion 415 is matched with the snap-fit ​​groove 432 to form the arc nozzle group protective cover. The first arc nozzle guide 411, the second arc nozzle guide 412, the first terminal guide 511 and the second terminal guide 521 are respectively matched with the first guide groove 31 and the third guide groove 33. The phase isolation plate 6 passes through the middle groove of the arc nozzle, and the isolation guide 61 is matched with the second guide groove 32. Figure 4 (a) is the side view of the arc nozzle group protective cover, Figure 4 (b) is the front view of the arc nozzle group protective cover. Figure 12 (a) is a schematic diagram of the overall front view of the electrical switch after the protective structure and phase isolation plate are installed. Figure 12 (b) is a schematic diagram of the overall top view of the electrical switch after the protective structure and phase isolation plate are installed.

[0039] When installing the protective structure of an electrical switch provided by the present invention, first push the first arc outlet guide 411 and the second arc outlet guide 412 of the arc outlet protective cover 4 into the first guide groove 31 and the third guide groove 33 until the bottom end of the arc outlet protective cover is flush with the bottom of the electrical switch, and then after completing the terminal wiring, push the first terminal guide 511 and the second terminal guide 521 of the first terminal shield 51 and the second terminal shield 52 into the first guide groove 31 and the third guide groove 33 to press the terminal, and the phase isolation plate 6 slides in along the middle groove 413 of the arc outlet and the middle groove of the terminal.

[0040] The utility model provides a protective structure for an electrical switch to eliminate arcing gas. Figure 8 As shown, an arc zone and an arc extinguishing zone are provided inside the electrical switch. The gas in the arc extinguishing zone was originally discharged directly through the arc nozzle group, but now passes through the arc nozzle group and enters the arc nozzle protective cover 4. The gas is filtered through multiple filter holes in the metal filter 42, and the filtered gas is discharged through multiple filter gas exhaust holes on the back of the protective cover shell 41 to avoid arcing.

Claims

1. A protective structure for an electrical switch, characterized in that: The electrical switch includes a terminal group, an arc spray nozzle group located downstream of the terminal group, and an interphase isolation plate; the terminal group includes a first terminal and a second terminal arranged with the first terminal, the arc spray nozzle group includes a first arc spray nozzle and a second arc spray nozzle arranged horizontally with the first arc spray nozzle, grooves are provided on both sides of the terminal group and the arc spray nozzle group to form a first guide groove and a third guide groove respectively, and grooves are provided between the first terminal and the second terminal and between the first arc spray nozzle and the second arc spray nozzle to form a second guide groove; an isolation guide is provided on one side of the interphase isolation plate to cooperate with the second guide groove; the protective structure includes a first terminal protection cover, a second terminal protection cover, and an arc spray nozzle group protection cover; The arc spray port group protective cover includes: a protective cover shell, a metal filter screen built into the protective cover shell, and a protective cover base located at the lower part of the protective cover shell. The protective cover shell is provided with a first arc spray port guide and a second arc spray port guide that respectively cooperate with the first guide groove and the third guide groove. The interior of the protective cover shell is provided with a metal filter screen mounting groove that cooperates with the edge of the metal filter screen. The middle of the protective cover shell is provided with a central arc spray port groove that cooperates with the isolation guide. The exterior of the protective cover shell is provided with a snap-fit ​​protrusion toward the protective cover base, and the snap-fit ​​protrusion is connected with the snap-fit ​​groove provided on the protective cover base. The first terminal protection cover and the second terminal protection cover are respectively provided with a first terminal guide and a second terminal guide that match the first guide groove and the third guide groove; The metal filter is installed inside the protective cover shell along the metal filter installation groove. The snap-fit ​​protrusion and the snap-fit ​​groove are connected to form the arc spray port group protective cover. The first arc spray port guide, the second arc spray port guide, the first terminal guide and the second terminal guide are respectively connected to the first guide groove and the third guide groove. The phase isolation plate passes through the middle groove of the arc spray port, and the isolation guide is connected to the second guide groove.

2. The protective structure of an electrical switch according to claim 1, characterized in that: The first terminal protection cover and the second terminal protection cover form a terminal middle groove, which is located upstream of the arc spray port middle groove.

3. The protective structure of an electrical switch according to claim 1, characterized in that: The protective cover shell is provided with a bolt hole inside, and the protective cover base is provided with a bolt through hole. Bolts pass through the bolt hole and the bolt through hole to connect the protective cover shell and the protective cover base.

4. The protective structure of an electrical switch according to claim 1, characterized in that: The protective cover shell is provided with a clamping space, and the protective cover base is provided with a clamping hook. The protective cover shell and the protective cover base are connected by matching the clamping space and the clamping hook.

5. The protective structure of an electrical switch according to claim 1, characterized in that: The back of the protective cover shell is provided with a plurality of filtered gas exhaust holes.

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