Insulation device and circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an insulating device and a circuit breaker. The insulating device provided by the utility model comprises an arc-isolating cover and an insulating partition plate, wherein the arc-isolating cover is provided with an exhaust area; the insulating partition plate comprises at least one first plate body, and the first plate body comprises a connecting part and an inserting part. The insulation device can be selectively installed at at least one of the upper end and the lower end of the circuit breaker, the arc isolation cover at least covers a plurality of exhaust ports in a shell of the circuit breaker, the first plate body is inserted into the end, away from the circuit breaker, of the arc isolation cover through the insertion part, installation is convenient, and the insertion part is located between adjacent exhaust areas. Interphase breakdown of the circuit breaker can be effectively prevented through the arc isolating cover and the inserting part, so that the reliability of interphase insulation of the circuit breaker is ensured, the first plate body is connected with the front cover end face of the circuit breaker and the front side face of the arc isolating cover through the connecting part, the isolating range of the first plate body is increased, and interphase breakdown of the circuit breaker can be further effectively prevented.

Description

Technical Field

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

[0002] With the continuous development of power distribution technology, the size and performance requirements of the power distribution system for circuit breakers are gradually increasing, prompting the molded case circuit breaker products to continue to develop in the direction of small size and high performance. At present, the breaking voltage and breaking current of circuit breaker products are getting higher and higher. The arc breaking process will generate huge arc energy. If the phase-to-phase insulation is not done well, it is very easy to cause phase-to-phase breakdown, resulting in product failure. Utility Model Content

[0003] The purpose of the utility model is to provide an insulating device and a circuit breaker to solve the technical problem that the existing phase-to-phase insulating device cannot meet the demand due to the increasingly higher breaking voltage and breaking current of the circuit breaker products, which is very likely to cause phase breakdown and thus lead to product failure.

[0004] The utility model provides an insulating device, which is used to be installed at the upper end and / or the lower end of a circuit breaker. The insulating device comprises: an arc shield and an insulating partition. The arc shield is used to cover at least a plurality of exhaust ports on the housing of the circuit breaker, and the end of the arc shield away from the circuit breaker has an exhaust area corresponding to the plurality of exhaust ports on the housing of the circuit breaker.

[0005] The insulating partition includes at least one first plate body, the first plate body includes a connecting portion and a plug-in portion, and along the front-to-back direction of the circuit breaker, the connecting portion is located at the front end of the plug-in portion;

[0006] Along the up-down direction of the circuit breaker, one end of the connecting portion facing the circuit breaker is higher than one end of the plug-in portion facing the circuit breaker;

[0007] The connecting portion is used to connect to the front cover end face of the circuit breaker and the front side face of the arc shield, the plug-in portion is plugged into the end of the arc shield facing away from the circuit breaker at one end facing the circuit breaker, and the plug-in portion is located between adjacent exhaust areas.

[0008] As a further technical solution, the arc isolation cover includes an anti-ionization device, and the anti-ionization device is used to be arranged at the exhaust port on the housing of the circuit breaker.

[0009] As a further technical solution, the arc isolation cover further comprises a cover body, the cover body is used to cover a plurality of exhaust ports and a plurality of wiring terminals on the housing of the circuit breaker, and the deionization device is arranged in the cover body;

[0010] The end of the cover body away from the circuit breaker has the exhaust area corresponding to the multiple exhaust ports on the housing of the circuit breaker one by one, and the plug-in portion is plugged into the end of the cover body away from the circuit breaker at one end facing the circuit breaker.

[0011] As a further technical solution, the connecting portion is provided with abutting ribs, and the abutting surface width of the abutting ribs is greater than the thickness of the first plate body, the abutting ribs are used to abut against the front cover end face of the circuit breaker and the front side face of the arc isolation cover, or, the abutting ribs are used to abut against the front cover end face of the circuit breaker, and the end of the connecting portion facing the front side face of the arc isolation cover is inserted into the front side face of the arc isolation cover, or, the abutting ribs are used to abut against the front side face of the arc isolation cover, and the end of the connecting portion facing the front cover of the circuit breaker is inserted into the front cover end face of the circuit breaker;

[0012] Or, a first plug-in rib is provided on the connecting portion, and the first plug-in rib is used to be plugged into the end face of the front cover of the circuit breaker for limited engagement, and the end of the connecting portion facing the front side face of the arc isolation cover is plugged into the front side face of the arc isolation cover;

[0013] Or, the connecting portion is provided with an abutting rib and a first plug-in rib, and the abutting surface width of the abutting rib is greater than the thickness of the first plate body, the abutting rib is used to abut against the front side surface of the arc isolation cover, and the first plug-in rib is used to be plugged into the front cover end surface of the circuit breaker for limiting fit;

[0014] Alternatively, the end of the connecting portion facing the front side of the arc shield is inserted into the front side of the arc shield, and the end of the connecting portion facing the front cover of the circuit breaker is inserted into the end surface of the front cover of the circuit breaker.

[0015] As a further technical solution, a second plug-in rib is provided on the plug-in portion, a second plug-in rib groove is provided on the arc isolation cover, and the second plug-in rib is plugged into the second plug-in rib groove.

[0016] As a further technical solution, the connecting portion and the plug-in portion form an L-shaped structure.

[0017] As a further technical solution, the insulating partition further includes a second plate body, and the second plate body is used to be arranged at the rear side of the housing of the circuit breaker;

[0018] Along the front-to-rear direction of the circuit breaker, the second plate body is arranged at the rear end of the arc isolation cover and the rear end of the first plate body, and the second plate body and the first plate body are perpendicular to each other.

[0019] As a further technical solution, a mounting slot is provided on a side of the second plate body facing the first plate body, and a rear end of the first plate body is plugged into the mounting slot.

[0020] The utility model provides a circuit breaker, comprising a housing, a front cover and the insulating device, wherein the front cover is arranged on the front side of the housing;

[0021] The upper end of the shell is provided with a plurality of connection terminals and a plurality of exhaust ports communicating with the interior of the shell, and the insulating device is located at the upper ends of the shell and the front cover, and / or, the lower end of the shell is provided with a plurality of connection terminals and a plurality of exhaust ports communicating with the interior of the shell, and the insulating device is located at the lower ends of the shell and the front cover;

[0022] The arc shield is at least provided to cover the plurality of exhaust ports, and the connecting portion is connected to the end surface of the front cover and the front side surface of the arc shield.

[0023] As a further technical solution, the connection terminal is located at the rear side of the exhaust port.

[0024] Compared with the prior art, the insulating device and circuit breaker provided by the utility model have the following technical advantages:

[0025] The utility model provides an insulating device, which is used to be installed at the upper end and / or the lower end of a circuit breaker. The insulating device comprises: an arc shield and an insulating partition, wherein the arc shield is used to at least cover a plurality of exhaust ports on a housing of the circuit breaker, and an end of the arc shield away from the circuit breaker has an exhaust zone corresponding to the plurality of exhaust ports on the housing of the circuit breaker on a one-to-one basis; the insulating partition comprises at least one first plate body, the first plate body comprises a connecting portion and a plug-in portion, and along the front-to-back direction of the circuit breaker, the connecting portion is located at the front end of the plug-in portion; along the upper-lower direction of the circuit breaker, an end of the connecting portion facing the circuit breaker is higher than an end of the plug-in portion facing the circuit breaker; the connecting portion is used to be connected to the front cover end face of the circuit breaker and the front side face of the arc shield, an end of the plug-in portion facing the circuit breaker is plugged into an end of the arc shield away from the circuit breaker, and the plug-in portion is located between adjacent exhaust zones.

[0026] The insulating device can be selectively installed on at least one of the upper end and the lower end of the circuit breaker. During installation, the arc shield can be first installed on the circuit breaker, and the arc shield at least covers a plurality of exhaust ports on the housing of the circuit breaker, and then the first plate is plugged into the end of the arc shield away from the circuit breaker through the plug-in portion. The installation is convenient, and the plurality of exhaust ports on the housing of the circuit breaker correspond to the exhaust areas one by one, and the plug-in portion is located between adjacent exhaust areas. The arc shield and the plug-in portion can effectively prevent the circuit breaker from phase breakdown, thereby ensuring the reliability of the phase-to-phase insulation of the circuit breaker. At the same time, the first plate is connected to the front cover end face of the circuit breaker and the front side face of the arc shield through the connecting portion located at the front end of the plug-in portion, thereby increasing the isolation range of the first plate, which can further effectively prevent the circuit breaker from phase breakdown, thereby further ensuring the reliability of the phase-to-phase insulation of the circuit breaker.

[0027] The circuit breaker provided by the utility model comprises a shell, a front cover and the above-mentioned insulating device, the front cover is arranged on the front side of the shell; the upper end of the shell is provided with a plurality of wiring terminals and a plurality of exhaust ports connected to the inside of the shell, the insulating partition is located at the upper end of the shell and the front cover, the insulating device is located at the upper end of the shell and the front cover, and / or, the lower end of the shell is provided with a plurality of wiring terminals and a plurality of exhaust ports connected to the inside of the shell, the insulating device is located at the lower end of the shell and the front cover; the arc shield is at least provided on the plurality of exhaust ports, and the connecting part is connected to the end face of the front cover and the front side face of the arc shield. Therefore, the technical advantages and effects achieved include the technical advantages and effects achieved by the above-mentioned insulating device, which will not be elaborated in detail here.

[0028] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a circuit breaker provided by an embodiment of the utility model when an insulating device is installed;

[0031] Figure 2 A schematic diagram of the first plate structure provided in an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the second plate structure provided in an embodiment of the utility model;

[0033] Figure 4 A schematic diagram of the circuit breaker structure when no insulating device is installed provided in an embodiment of the utility model.

[0034] Icons: 1-insulating partition; 2-circuit breaker; 3-housing; 4-front cover; 5-first plate; 6-connecting part; 7-plug-in part; 8-terminal; 9-exhaust port; 10-abutting rib; 11-second plug-in rib; 12-second plate; 13-installation slot; 14-middle cover; 15-base; 16-second plug-in rib slot; 17-insulating device; 18-arc-isolating cover; 19-exhaust area; 20-exhaust hole. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0040] Specific structure such as Figures 1 to 4 shown.

[0041] The present embodiment provides an insulating device 17 for installation at the upper end and / or the lower end of the circuit breaker 2. The insulating device 17 includes: an arc shield 18 and an insulating partition 1. The arc shield 18 is used to at least cover a plurality of exhaust ports 9 on the housing 3 of the circuit breaker 2, and the end of the arc shield 18 away from the circuit breaker 2 has an exhaust area 19 corresponding to the plurality of exhaust ports 9 on the housing 3 of the circuit breaker 2, and the exhaust area 19 is provided with exhaust holes 20; the exhaust holes 20 can be circular holes, rectangular holes or other shapes, or exhaust holes formed on the surface of a metal fiber felt or a wire mesh plate, which is not limited here. The insulating partition 1 includes at least one first plate body 5, the first plate body 5 includes a connecting portion 6 and a plug-in portion 7, and along the front-to-back direction of the circuit breaker 2, the connecting portion 6 is located at the front end of the plug-in portion 7; along the up-down direction of the circuit breaker 2, the end of the connecting portion 6 facing the circuit breaker 2 is higher than the end of the plug-in portion 7 facing the circuit breaker 2; the connecting portion 6 is used to be connected to the end face of the front cover 4 of the circuit breaker 2 and the front side face of the arc isolation cover 18, the end of the plug-in portion 7 facing the circuit breaker 2 is plugged into the end of the arc isolation cover 18 away from the circuit breaker 2, and the plug-in portion 7 is located between adjacent exhaust areas 19.

[0042] In this embodiment, the insulating device 17 can be selectively installed at least one of the upper end and the lower end of the circuit breaker 2 . The following description takes the case where the insulating partition 1 is installed at the upper end of the circuit breaker 2 as an example. During installation, the arc shield 18 can be first installed on the upper end of the circuit breaker 2, and the arc shield 18 at least covers a plurality of exhaust ports 9 on the upper end of the housing 3 of the circuit breaker 2, and then the first plate 5 is plugged into the end of the arc shield 18 away from the circuit breaker 2 through the plug-in portion 7, which is convenient for installation. The plurality of exhaust ports 9 on the upper end of the housing 3 of the circuit breaker 2 correspond to the exhaust areas 19 one by one, and exhaust is discharged through the exhaust holes 20, and the plug-in portion 7 is located between adjacent exhaust areas 19. The arc shield 18 and the plug-in portion 7 can effectively prevent the phase-to-phase breakdown of the upper end of the circuit breaker 2, thereby ensuring the reliability of the insulation between the phases of the circuit breaker 2. At the same time, the first plate 5 is connected to the upper end surface of the front cover 4 of the circuit breaker 2 and the front side surface of the arc shield 18 through the connecting portion 6 located at the front end of the plug-in portion 7, thereby increasing the isolation range of the first plate 5, which can further effectively prevent the phase-to-phase breakdown of the circuit breaker 2, thereby further ensuring the reliability of the phase-to-phase insulation of the circuit breaker 2.

[0043] In this embodiment, the number of first plates 5 is determined according to specific needs. Preferably, the number of first plates 5 is determined according to the number of exhaust zones 19. First plates 5 are provided between adjacent exhaust zones 19 to ensure the insulation reliability between all adjacent exhaust zones 19, thereby ensuring the reliability of phase-to-phase insulation.

[0044] It should be noted that, in this embodiment, the front, rear, upper and lower directions are set based on the circuit breaker 2, wherein the front direction of the circuit breaker 2 is the front direction of the circuit breaker 2, the back direction of the circuit breaker 2 is the back direction of the circuit breaker 2, the upper end direction of the circuit breaker 2 is the upper direction of the circuit breaker 2, and the lower end direction of the circuit breaker 2 is the lower direction of the circuit breaker 2.

[0045] In the optional technical solution of this embodiment, the arc shield 18 includes an anti-ionization device, which is used to be arranged at the exhaust port 9 on the housing 3 of the circuit breaker 2. The anti-ionization device ensures the anti-ionization effect, avoids the risk of phase-to-phase breakdown, and thus ensures the reliability of phase-to-phase insulation.

[0046] In the optional technical solution of this embodiment, the arc isolation cover 18 also includes a cover body, which is used to cover multiple exhaust ports 9 and multiple wiring terminals 8 on the shell 3 of the circuit breaker 2, and the ion elimination device is arranged in the cover body; the end of the cover body facing away from the circuit breaker 2 has an exhaust area 19 corresponding to the multiple exhaust ports 9 on the shell 3 of the circuit breaker 2, and the plug-in portion 7 is plugged into the end of the cover body facing away from the circuit breaker 2.

[0047] In this embodiment, when the arc isolation cover 18 only includes the deionization device, the end of the deionization device away from the circuit breaker 2 has an exhaust area 19, and the end of the plug-in portion 7 facing the circuit breaker 2 is plugged into the end of the deionization device away from the circuit breaker 2, and the deionization device can be covered at multiple exhaust ports 9 on the housing 3 of the circuit breaker 2; when the deionization device and the cover body are provided together, the end of the deionization device away from the circuit breaker 2 can have an exhaust area 19, and the deionization device can be covered at multiple exhaust ports 9 on the housing 3 of the circuit breaker 2, and the cover body is covered at At the multiple wiring terminals 8 on the shell 3 of the circuit breaker 2, the de-ionizing device is arranged in front and behind the cover body, and the plug-in portion 7 is inserted into the end of the cover body facing away from the circuit breaker 2 and the end of the de-ionizing device facing away from the circuit breaker 2 at one end facing the circuit breaker 2; it can also be that the cover body covers multiple exhaust ports 9 and multiple wiring terminals 8 on the shell 3 of the circuit breaker 2, the de-ionizing device is arranged in the cover body corresponding to the exhaust ports 9, the end of the cover body facing away from the circuit breaker 2 has an exhaust area 19, and the plug-in portion 7 is inserted into the end of the cover body facing away from the circuit breaker 2 at one end facing the circuit breaker 2.

[0048] In the optional technical solution of this embodiment, the connection part 6 is provided with abutting ribs 10, and the abutting surface width of the abutting ribs 10 is greater than the thickness of the first plate body 5. The abutting surface of the abutting ribs 10 abuts against the upper end surface of the front cover 4 of the circuit breaker 2 and the front side surface of the arc isolation cover 18 in a fitted state, and the abutting area is large, thereby ensuring the partition effect and enhancing the insulation effect, thereby ensuring the reliability of the phase-to-phase insulation of the upper end of the circuit breaker 2. Another implementation method is that only the end surface of the front cover 4 of the circuit breaker 2 facing the connection part 6 abuts against the upper end surface of the front cover 4 of the circuit breaker 2 through the abutting ribs 10. At this time, a slot is provided on the front side surface of the arc isolation cover 18, and the end of the connection part 6 facing the front side surface of the arc isolation cover 18 is directly inserted into the slot on the front side surface of the arc isolation cover 18.

[0049] The present embodiment is not limited to this, and a first plug-in rib may be provided on the connecting portion 6. In this case, a first plug-in rib groove is provided on the upper end surface of the front cover 4 of the circuit breaker 2. The first plug-in rib is inserted into the first plug-in rib groove to limit the position, thereby ensuring the stability of the insertion and thus ensuring the reliability of the phase-to-phase insulation. In this case, a slot may be provided on the front side of the arc-isolating cover 18, and the connecting portion 6 may be directly inserted into the slot on the front side of the arc-isolating cover 18. Alternatively, no slot may be provided on the front side of the arc-isolating cover 18, and the connecting portion 6 may directly abut against the front side of the arc-isolating cover 18.

[0050] Alternatively, the connection portion 6 is provided with abutting ribs 10 and first plug-in ribs, and the width of the abutting surface of the abutting ribs 10 is greater than the thickness of the first plate 5, and the abutting surface of the abutting ribs 10 is in abutment with the front side surface of the arc-isolating cover 18 in a fitted state, and the abutting area is large, thereby ensuring the partition effect and enhancing the insulation effect, thereby ensuring the reliability of the phase-to-phase insulation at the upper end of the circuit breaker 2; the first plug-in rib is used to be inserted into the end surface of the front cover 4 of the circuit breaker 2 for limited fit, at this time, the upper end surface of the front cover of the circuit breaker 2 is provided with a first plug-in rib groove, and the first plug-in rib can be inserted into the first plug-in rib groove to limit the position, ensuring the stability of the plug-in, thereby ensuring the reliability of the phase-to-phase insulation. This embodiment is not limited to this, and the upper end surface of the front cover 4 of the circuit breaker 2 can also be directly provided with a slot, and the end of the connection portion 6 facing the circuit breaker 2 is directly plugged into the slot, which has a simple structure and is easy to manufacture.

[0051] There are many possible combinations, which I will not go into detail here.

[0052] In the optional technical solution of this embodiment, a second plug-in rib 11 is provided on the plug-in portion 7, and a second plug-in rib groove 16 is provided on the arc isolation cover 18. The second plug-in rib 11 can be limited by being plugged into the second plug-in rib groove 16 to ensure the stability of the plug-in, thereby ensuring the reliability of the phase-to-phase insulation.

[0053] The present embodiment is not limited thereto, and a slot may be directly provided on the arc isolation cover 18, and one end of the plug-in portion 7 facing the circuit breaker 2 is directly plugged into the slot, which has a simple structure and is easy to manufacture.

[0054] In the optional technical solution of this embodiment, the connecting portion 6 and the plug-in portion 7 form an L-shaped structure. Since the front side surface and the upper end surface of the arc shield 18 are L-shaped, the L-shaped structure formed by the connecting portion 6 and the plug-in portion 7 is more convenient to connect with the arc shield 18 and avoid leaving a gap. However, it is not limited to this. The shape formed by the connecting portion 6 and the plug-in portion 7 can be specifically determined according to the shape between the front side surface of the arc shield 18 and the end surface facing away from the circuit breaker 2, as long as they can match each other.

[0055] In the optional technical solution of this embodiment, the insulating partition 1 also includes a second plate body 12, and the second plate body 12 is used to be arranged on the rear side of the housing 3 of the circuit breaker 2; along the front and rear direction of the circuit breaker 2, the second plate body 12 is arranged at the rear end of the arc isolation cover 18 and the rear end of the first plate body 5, and the second plate body 12 and the first plate body 5 are perpendicular to each other.

[0056] In this embodiment, after the circuit breaker 2 is installed on the installation surface of the circuit breaker 2, the second plate 12 can block the arc spray energy from entering the rear side of the circuit breaker 2, thereby improving safety.

[0057] In this embodiment, the second plate body 12 can be connected to the rear side of the housing 3 of the circuit breaker 2, but is not limited to this. The second plate body 12 and the circuit breaker 2 may not be connected. When the circuit breaker 2 is installed on the mounting surface of the circuit breaker 2, the second plate body 12 is clamped between the rear side of the housing 3 of the circuit breaker 2 and the mounting surface of the circuit breaker 2 to achieve fixation. The structure is simple and the installation is convenient.

[0058] In the optional technical solution of this embodiment, a mounting slot 13 is provided on the side of the second plate body 12 facing the first plate body 5, and the rear end of the first plate body 5 is plugged into the mounting slot 13. The installation is stable and convenient, and a gap is avoided between the rear end of the first plate body 5 and the side of the second plate body 12 facing the first plate body 5, thereby ensuring the reliability of phase-to-phase insulation.

[0059] In this embodiment, the second plate body 12 is made of a hard insulating material, which has high strength and avoids deformation.

[0060] The present embodiment is not limited thereto, and the side of the second plate body 12 facing the first plate body 5 may also directly abut against the rear end of the first plate body 5 , which has a simple structure and is easy to manufacture.

[0061] It should be noted that, in this embodiment, the plugging direction of the plug-in portion 7 is from the front side to the rear side of the circuit breaker 2 , which is convenient for plugging and avoids interference between the connecting portion 6 and the arc shield 18 .

[0062] The present embodiment provides a circuit breaker 2, comprising a housing 3, a front cover 4 and the above-mentioned insulating device 17, wherein the front cover 4 is provided on the front side of the housing 3; the upper end of the housing 3 is provided with a plurality of wiring terminals 8 and a plurality of exhaust ports 9 communicating with the interior of the housing 3, the insulating device 17 is located at the upper end of the housing 3 and the front cover 4, and / or, the lower end of the housing 3 is provided with a plurality of wiring terminals 8 and a plurality of exhaust ports 9 communicating with the interior of the housing 3, the insulating device 17 is located at the lower end of the housing 3 and the front cover 4; the arc shield 18 is at least provided on the plurality of exhaust ports 9, and the connecting portion 6 is connected to the end face of the front cover 4 and the front side face of the arc shield 18. Therefore, the technical advantages and effects achieved by the circuit breaker 2 include the technical advantages and effects achieved by the above-mentioned insulating device 17, which will not be repeated here.

[0063] In the optional technical solution of this embodiment, the housing 3 includes a middle cover 14 and a base 15 which are arranged in sequence from front to back, and the front cover 4 is arranged on the middle cover 14. The housing 3 has a simple structure and is easy to assemble.

[0064] In an optional technical solution of this embodiment, the connection terminal 8 is located at the rear side of the exhaust port 9 . However, the present invention is not limited thereto, and the connection terminal 8 may also be located at the front side of the exhaust port 9 .

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An insulating device, for installation at the upper end and / or the lower end of a circuit breaker (2), characterized in that: The insulating device (17) comprises: an arc shield (18) and an insulating partition (1), wherein the arc shield (18) is used to at least shield a plurality of exhaust ports (9) on a housing (3) of a circuit breaker (2), and an end of the arc shield (18) facing away from the circuit breaker (2) has an exhaust area (19) corresponding one-to-one to the plurality of exhaust ports (9) on the housing (3) of the circuit breaker (2); The insulating partition (1) comprises at least one first plate body (5), the first plate body (5) comprising a connecting portion (6) and a plug-in portion (7), and along the front-to-back direction of the circuit breaker (2), the connecting portion (6) is located at the front end of the plug-in portion (7); Along the up-down direction of the circuit breaker (2), one end of the connecting portion (6) facing the circuit breaker (2) is higher than one end of the plug-in portion (7) facing the circuit breaker (2); The connecting portion (6) is used to connect to the end surface of the front cover (4) of the circuit breaker (2) and the front side surface of the arc shield (18); one end of the plug-in portion (7) facing the circuit breaker (2) is plugged into one end of the arc shield (18) facing away from the circuit breaker (2); and the plug-in portion (7) is located between adjacent exhaust areas (19).

2. The insulation device according to claim 1, characterized in that The arc shield (18) comprises an anti-ionization device, and the anti-ionization device is used to be arranged at an exhaust port (9) on a housing (3) of a circuit breaker (2).

3. The insulation device according to claim 2, characterized in that The arc isolation cover (18) further comprises a cover body, the cover body being used to cover a plurality of exhaust ports (9) and a plurality of connection terminals (8) on a housing (3) of the circuit breaker (2), and the deionization device being arranged in the cover body; The end of the cover body facing away from the circuit breaker (2) has the exhaust area (19) corresponding one-to-one to the plurality of exhaust ports (9) on the housing (3) of the circuit breaker (2), and the plug-in portion (7) is plugged into the end of the cover body facing away from the circuit breaker (2) at one end facing the circuit breaker (2).

4. The insulation device according to claim 1, characterized in that The connecting portion (6) is provided with an abutting rib (10), and the abutting surface width of the abutting rib (10) is greater than the thickness of the first plate (5), the abutting rib (10) is used to abut against the end face of the front cover (4) of the circuit breaker (2) and the front side face of the arc isolation cover (18), or the abutting rib (10) is used to abut against the end face of the front cover (4) of the circuit breaker (2), and the end of the connecting portion facing the front side face of the arc isolation cover (18) is inserted into the front side face of the arc isolation cover (18), or the abutting rib (10) is used to abut against the front side face of the arc isolation cover (18), and the end of the connecting portion (6) facing the front cover (4) of the circuit breaker (2) is inserted into the end face of the front cover (4) of the circuit breaker (2); Alternatively, a first plug-in rib is provided on the connecting portion (6), and the first plug-in rib is used to be plugged into the end surface of the front cover (4) of the circuit breaker (2) for limited engagement, and the end of the connecting portion (6) facing the front side surface of the arc isolation cover (18) is plugged into the front side surface of the arc isolation cover (18); Alternatively, the connecting portion (6) is provided with an abutting rib (10) and a first plugging rib, and the abutting surface width of the abutting rib (10) is greater than the thickness of the first plate (5), the abutting rib (10) is used to abut against the front side surface of the arc isolation cover (18), and the first plugging rib is used to be plugged into the end surface of the front cover (4) of the circuit breaker (2) for limited engagement; Alternatively, the end of the connecting portion (6) facing the front side of the arc isolation cover (18) is inserted into the front side of the arc isolation cover (18), and the end of the connecting portion (6) facing the front cover (4) of the circuit breaker (2) is inserted into the end face of the front cover (4) of the circuit breaker (2).

5. The insulation device according to claim 1, characterized in that The plug-in portion (7) is provided with a second plug-in rib (11), the arc-isolating cover (18) is provided with a second plug-in rib groove (16), and the second plug-in rib (11) is plugged into the second plug-in rib groove (16).

6. The insulation device according to claim 1, characterized in that The connecting portion (6) and the plug-in portion (7) form an L-shaped structure.

7. The insulation device according to any one of claims 1 to 6, characterized in that: The insulating partition (1) further comprises a second plate body (12), and the second plate body (12) is used to be arranged on the rear side of the housing (3) of the circuit breaker (2); Along the front-to-rear direction of the circuit breaker (2), the second plate body (12) is arranged at the rear end of the arc isolation cover (18) and the rear end of the first plate body (5), and the second plate body (12) and the first plate body (5) are perpendicular to each other.

8. The insulation device (17) according to claim 7, characterized in that A mounting slot (13) is provided on a side of the second plate body (12) facing the first plate body (5), and a rear end of the first plate body (5) is plugged into the mounting slot (13).

9. A circuit breaker, characterized in that: It comprises a housing (3), a front cover (4) and an insulating device (17) according to any one of claims 1 to 8, wherein the front cover (4) is arranged on the front side of the housing (3); The upper end of the shell (3) is provided with a plurality of connection terminals (8) and a plurality of exhaust ports (9) communicating with the interior of the shell (3), and the insulating device (17) is located at the upper end of the shell (3) and the front cover (4), and / or the lower end of the shell (3) is provided with a plurality of connection terminals (8) and a plurality of exhaust ports (9) communicating with the interior of the shell (3), and the insulating device (17) is located at the lower end of the shell (3) and the front cover (4); The arc isolation cover (18) is at least provided to cover a plurality of the exhaust ports (9), and the connecting portion (6) is connected to an end surface of the front cover (4) and a front side surface of the arc isolation cover (18).

10. The circuit breaker according to claim 9, characterized in that The connection terminal (8) is located at the rear side of the exhaust port (9).

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