Arc isolation cover for circuit breaker and circuit breaker
By designing detachable arc shields and arc plates, the problems of narrow applicability and equipment damage during disassembly of existing arc shields are solved, realizing the versatility and flexibility of arc shields and reducing the risk of electric arc and equipment damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-28
AI Technical Summary
Existing arc-blocking covers can only be adapted to specific types of circuit breakers, have a narrow range of applications, and are prone to damaging equipment during disassembly.
A detachable arc-blocking cover was designed, including an insulating cover and a detachable arc-blocking plate. It can be flexibly installed through a track groove and a break-off part, adapting to various circuit breaker structures. It also accelerates the flow of high-temperature and high-pressure gas through multiple air outlets, reducing the risk of electric arc.
It expands the application scope of arc isolation covers, saves on disassembly and replacement costs, reduces the risk of equipment damage, and improves versatility and flexibility.
Smart Images
Figure CN224177304U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit breaker technology, specifically to an arc-blocking cover for a circuit breaker and a circuit breaker. Background Technology
[0002] A circuit breaker typically consists of a moving contact and a stationary contact. When the moving contact is in contact with the stationary contact, the circuit breaker is in operation, and the current in the circuit is flowing. When an abnormal situation such as a short circuit or overload occurs in the circuit, the moving contact disengages from the stationary contact, and the circuit is disconnected.
[0003] During the process of the moving contact and the stationary contact disengaging, an electric arc is generated in the arc-extinguishing chamber, and this arc can be ejected outward from the outlet of the arc-extinguishing chamber. Since the ejected arc can cause problems such as phase-to-phase breakdown and burning of external parts of the circuit breaker, an arc-damping enclosure is usually installed on the outside of the circuit breaker housing to mitigate or even avoid the aforementioned problems.
[0004] The arc-blocking shields in the existing technology can only be used for specific types of circuit breakers, and their application range is relatively narrow. Utility Model Content
[0005] This application provides an arc-blocking enclosure for a circuit breaker and a circuit breaker, thereby expanding the applicability of the arc-blocking enclosure.
[0006] To achieve the above objectives, this application provides an arc-isolating cover for a circuit breaker. The circuit breaker has a housing, within which N arc-extinguishing chambers are arranged sequentially along a first direction, where N is an integer greater than or equal to 2. A first vent is provided on the housing corresponding to the same side of each arc-extinguishing chamber. The arc-isolating cover is disposed on the housing, and is located on the venting side of the first vent. The arc-isolating cover includes an insulating cover and N-1 first arc-isolating plates, wherein the insulating cover is disposed on the housing, and the insulating cover and the housing enclose an arc-isolating space. The first arc-isolating plates are disposed within the arc-isolating space, and are detachably disposed on the insulating cover. The N-1 first arc-isolating plates divide the arc-isolating space into N arc-isolating cavities, which are arranged sequentially along the first direction. Each arc-isolating cavity corresponds to an arc-extinguishing chamber, and the arc-isolating cavity communicates with the corresponding arc-extinguishing chamber through a first vent.
[0007] When the above technical solution is adopted, the arc-isolating cavity corresponds to the arc-extinguishing chamber. The arc-isolating cavity is connected to the corresponding arc-extinguishing chamber through the first air outlet, so that the electric arc generated during the process of the moving contact and the stationary contact separating from the contact can flow out of the arc-extinguishing chamber with the high-temperature and high-pressure gas through the first air outlet.
[0008] The first arc-isolating plate is detachably installed on the insulating cover. It can be flexibly installed or removed as needed, ensuring effective arc isolation while also improving the versatility and flexibility of the arc-isolating cover. The detachable first arc-isolating plate eliminates the need to disassemble the entire arc-isolating cover when it requires maintenance, saving time and labor costs and reducing the risk of equipment damage due to disassembly. Furthermore, the detachable first arc-isolating plate also eliminates the need to replace the entire arc-isolating cover when it needs replacement, further saving costs.
[0009] Furthermore, in practical implementation, depending on the structure of the circuit breaker used, the first arc-isolating plate can be placed on the insulating cover or removed from the insulating cover. That is, when the circuit breaker has a shorting bar, the first arc-isolating plate at the corresponding position can be removed; when the circuit breaker does not have a shorting bar, the first arc-isolating plate can be retained.
[0010] Thus, the arc-blocking cover provided in this application embodiment can be applied to circuit breakers with various structures, thereby expanding the scope of application of the arc-blocking cover.
[0011] In one possible implementation, the insulating cover is provided with a first track groove group corresponding to the first arc-blocking plate. The first track groove group includes two opposing first track grooves. The first track grooves extend along a second direction, and the two sides of the first arc-blocking plate along a third direction are respectively inserted into the two first track grooves. The first direction, the second direction, and the third direction are perpendicular to each other.
[0012] When adopting the above technical solution, the first arc-isolating plate can be inserted into the first track groove from below the insulating cover and move along the length of the first track groove. At the same time, the relative position between the first arc-isolating plate and the insulating cover can be adjusted according to actual needs, improving the flexibility and versatility of the arc-isolating cover.
[0013] In one possible implementation, the arc-blocking cover further includes N second arc-blocking plates arranged sequentially along a first direction, the second arc-blocking plates being disposed on the insulating cover. The second arc-blocking plates correspond to the arc-blocking cavities and are located within the arc-blocking cavities. The second arc-blocking plates serve to divide the arc-blocking cavities into a first arc-blocking cavity and a second arc-blocking cavity arranged sequentially along a third direction, the first arc-blocking cavity being located on the side closest to the arc-extinguishing chamber. The first direction and the third direction are perpendicular.
[0014] When the above technical solution is adopted, the setting of the second arc-blocking plate can enhance the blocking effect on the electric arc, further reduce the risk of the electric arc being ejected from the arc-blocking cover, and reduce the probability of the electric arc burning parts.
[0015] In addition, when the circuit breaker includes a shorting busbar, it can prevent the arc from striking the extension and reduce the risk of phase-to-phase breakdown caused by the arc.
[0016] In one possible implementation, a second air outlet is provided on the upper part of the second arc-blocking plate along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.
[0017] When adopting the above technical solution, the second vent is designed to facilitate the flow of high-temperature, high-pressure gas through the second vent and below the insulating cover, thereby accelerating the flow speed of the high-temperature, high-pressure gas. Simultaneously, the second vent is positioned on the upper part of the second arc-isolating plate along the second direction, which can reduce the risk of phase-to-phase breakdown caused by an electric arc striking the extension portion.
[0018] In one possible implementation, the second arc-blocking plate is detachably mounted on the insulating cover.
[0019] When adopting the above technical solution, the second arc-isolating plate can be flexibly installed or disassembled according to actual needs, ensuring the arc-isolating effect while also improving the versatility and flexibility of the arc-isolating cover. The second arc-isolating plate is removable; when the insulating cover or the second arc-isolating plate needs maintenance, it is not necessary to disassemble the entire arc-isolating cover, thus saving time and labor costs, and also reducing the risk of equipment damage caused by disassembly. The second arc-isolating plate is also removable; when the insulating cover or the second arc-isolating plate needs replacement, it is not necessary to replace the entire arc-isolating cover, saving costs.
[0020] In one possible implementation, the insulating cover is provided with a second set of track grooves corresponding to the second arc-blocking plate. The second set of track grooves includes two opposing second track grooves. The second track grooves extend along a second direction, and the two sides of the second arc-blocking plate along the first direction are respectively inserted into the two second track grooves.
[0021] When using the above technical solution, the second arc-isolating plate can be inserted into the second track groove from below the insulating cover and move along the length of the second track groove. Simultaneously, the relative position between the second arc-isolating plate and the insulating cover can be adjusted according to actual needs, improving the flexibility and versatility of the arc-isolating cover.
[0022] In one possible implementation, the insulating cover includes an insulating cover body and a plurality of detachable parts, the insulating cover body being disposed within the housing. The plurality of detachable parts are disposed on the insulating cover body and can be detached from the insulating cover body under external force. The detachable parts correspond to the side of the insulating cover body away from the arc-extinguishing chamber and to both sides of the insulating cover body along a first direction.
[0023] When adopting the above technical solution, in practical situations, the corresponding break-off part can be detached from the insulating cover body according to the specific structure of the circuit breaker. This improves the flexibility and versatility of the arc-damping cover provided in this application embodiment, expanding its applicable scope.
[0024] In one possible implementation, there are multiple break-off portions corresponding to the side of the insulating cover body away from the arc-extinguishing chamber, and these multiple break-off portions correspond to the arc-extinguishing cavity.
[0025] When adopting the above technical solution, the corresponding break-off part can be detached from the insulating cover according to actual needs, ensuring the arc isolation effect while improving the flexibility and versatility of the arc isolation cover provided in this application embodiment and expanding the scope of application.
[0026] In one possible implementation, the insulating cover is provided with multiple third vents.
[0027] When the above technical solution is adopted, the flow rate of the high-temperature and high-pressure gas can be accelerated so that the high-temperature and high-pressure gas can flow out through the third outlet.
[0028] Secondly, this application provides a circuit breaker, including a housing, a plurality of terminals, and an arc-extinguishing cover as described in any possible implementation of the first aspect. The housing contains N arc-extinguishing chambers arranged sequentially along a first direction, where N is an integer greater than or equal to 2. The plurality of terminals are disposed in the housing, corresponding to the arc-extinguishing chambers. The arc-extinguishing cover is disposed in the housing.
[0029] The beneficial effects of the circuit breaker provided in the second aspect can be referred to the beneficial effects of the arc-isolating cover provided in the first aspect, and will not be elaborated here. Attached Figure Description
[0030] Figure 1 Partial schematic diagram of the circuit breaker provided in the embodiments of this application Figure 1 .
[0031] Figure 2 Partial schematic diagram of the circuit breaker provided in the embodiments of this application Figure 2 .
[0032] Figure 3 Partial schematic diagram of the circuit breaker provided in the embodiments of this application Figure 3 .
[0033] Figure 4 Partial schematic diagram of the arc-blocking shield provided in the embodiments of this application Figure 1 .
[0034] Figure 5 Partial schematic diagram of the arc-blocking shield provided in the embodiments of this application Figure 2 .
[0035] Figure 6 Partial schematic diagram of the arc-blocking shield provided in the embodiments of this application Figure 3 .
[0036] Figure 7 This is a schematic diagram of the first connecting row provided in an embodiment of this application.
[0037] Figure 8 This is a schematic diagram of the second connecting row provided in an embodiment of this application.
[0038] Figure 9 This is a schematic diagram of a jumper bar provided in an embodiment of this application.
[0039] Figure 10 This is a schematic diagram of the first arc-blocking plate provided in an embodiment of this application.
[0040] Figure 11 This is a schematic diagram of the second arc-blocking plate provided in an embodiment of this application.
[0041] Explanation of reference numerals in the attached figures:
[0042] 1-Arc blocking cover, 11-Insulating cover, 111-Breaking-off part, 112-Protrusion, 113-First surface,
[0043] 114 - Second surface, 115 - Third surface, 116 - Fourth surface, 12 - First arc-blocking plate, 13 - First track groove
[0044] 14-Second arc-blocking plate, 141-Second air outlet, 15-Third air outlet, 16-Second track groove, 2-Housing shell, 21-Arc-extinguishing chamber, 31-First outgoing terminal, 32-Second outgoing terminal, 33-Third outgoing terminal, 4-First connecting bar.
[0045] 5-Second connecting row, 6-Short connecting row, 61-Connecting part, 62-Extension part. Detailed Implementation
[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0048] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0049] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0050] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0051] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0052] First, please refer to Figures 1 to 3 As shown, this application embodiment provides a circuit breaker, which includes a housing 2, multiple wiring terminals, and as shown in the figure. Figures 4 to 6 The arc-isolating cover 1 shown has N arc-extinguishing chambers 21 arranged sequentially along a first direction inside the housing 2, where N is an integer greater than or equal to 2. Multiple wiring terminals are disposed on the housing 2, corresponding to the arc-extinguishing chambers 21. The arc-isolating cover 1 is disposed on the housing 2.
[0053] In fact, terminal blocks include incoming terminal blocks and outgoing terminal blocks.
[0054] The circuit breaker provided in this application embodiment also includes multiple channels. The number of arc-extinguishing chambers 21, the number of channels, the number of incoming terminals, and the number of outgoing terminals are the same, and one arc-extinguishing chamber 21 corresponds to one channel, one incoming terminal, and one outgoing terminal.
[0055] For example, the number of arc-extinguishing chambers 21 can be two, three or more, without being specifically limited here.
[0056] It should be noted that when there are two arc-extinguishing chambers 21, there are two circuits, and the circuit breaker is a two-pole circuit breaker. Correspondingly, when there are three arc-extinguishing chambers 21, there are three circuits, and the circuit breaker is a three-pole circuit breaker.
[0057] In practice, the housing 2 can be made of plastic, but it is not limited to this and the specific material depends on the actual situation. The structure of the housing 2 can be a cuboid structure, and the housing 2 has an accommodating space. The passage, wiring terminals, and arc-extinguishing cover 1 are all installed on the housing 2. Among them, the passage and the arc-extinguishing chamber 21 are located within the accommodating space.
[0058] The housing 2 can accommodate and contain the passageway and the arc-extinguishing chamber 21, providing a stable space for them to ensure normal operation without external interference. Simultaneously, the housing 2 provides positioning and support for the passageway and the arc-extinguishing chamber 21, preventing displacement or damage to components within it during operation. The housing 2 can also withstand a certain amount of external pressure, protecting the passageway and the arc-extinguishing chamber 21 from damage. Furthermore, the housing 2 provides protection, preventing moisture, dust, dirt, and other impurities from entering its interior, thus avoiding corrosion or damage to the passageway and the arc-extinguishing chamber 21 installed inside.
[0059] In practice, the circuit typically includes a stationary contact and a moving contact. The stationary contact can be fixedly mounted on the housing 2, while the moving contact can be rotatably mounted on the housing 2.
[0060] When the moving contact rotates relative to the housing 2 and contacts the stationary contact, the stationary contact, moving contact, and terminal are electrically connected, and the circuit current of the circuit breaker is connected.
[0061] When a short circuit or overload occurs in the circuit where the circuit breaker is located, the moving contact rotates relative to the housing 2, the moving contact disengages from the stationary contact, and the current in the circuit where the circuit breaker is located is interrupted.
[0062] During the process of the moving contact and the stationary contact disengaging, an electric arc will be generated in the arc-extinguishing chamber 21.
[0063] In the embodiments provided in this application, a first vent is provided on the housing 2 on the same side corresponding to each arc-extinguishing chamber 21. That is, a first vent is provided on the housing 2 at the location of each arc-extinguishing chamber 21, so that the electric arc can flow out of the arc-extinguishing chamber 21 along with the high-temperature and high-pressure gas through the first vent.
[0064] The arc shield 1 provided in this application embodiment is disposed on the housing 2 and is located on the air outlet side of the first air outlet. The arc shield 1 can reduce the risk of arc-induced phase-to-phase breakdown and arc-induced breakdown with external equipment parts.
[0065] In the embodiments provided in this application, a connecting strip can be provided at the outgoing terminal block. One end of the connecting strip can be electrically connected to the outgoing terminal block, and the other end of the connecting strip can be electrically connected to an external wiring lug.
[0066] In this application, the connecting row includes, for example, Figure 7 The first connecting row 4 shown and as follows Figure 8 The second connecting row 5 is shown.
[0067] Furthermore, it should be noted that, in specific implementations, depending on actual application requirements, the circuit breaker provided in this application embodiment can also be adopted as follows: Figure 9 The shorting bar 6 shown shorts two adjacent paths. For example... Figure 1 and Figure 2 As shown, the two ends of the shorting bar 6 are electrically connected to the two adjacent outgoing terminals, thereby shorting the two adjacent paths.
[0068] In practice, combined with Figure 1 , Figure 2 and Figure 9 As shown, the shorting bar 6 may include an extension 62 and two connecting parts 61. The extension 62 may extend along a third direction. The two connecting parts 61 are electrically connected to two adjacent outgoing terminals, respectively.
[0069] Please combine Figures 4 to 6 As shown, the arc-blocking cover 1 for a circuit breaker provided in this embodiment includes an insulating cover 11 and N-1 such... Figure 10 The first arc-blocking plate 12 shown has an insulating cover 11 disposed on the housing 2, and the insulating cover 11 and the housing 2 enclose an arc-blocking space.
[0070] In practice, the insulating cover 11 can be made of flame-retardant nylon. Of course, it is not limited to this in practice. This is just an example and is not intended to be a specific limitation.
[0071] Combination Figures 4 to 6 The insulating cover 11 may include a first surface 113, a second surface 114, a third surface 115, and a fourth surface 116. The first surface 113 and the second surface 114 may be perpendicular to a first direction and are disposed opposite to each other. The third surface 115 may be perpendicular to a third direction, and both sides of the third surface 115 along the first direction are connected to the first surface 113 and the second surface 114, respectively. The fourth surface 116 may be perpendicular to a second direction, and both sides of the fourth surface 116 along the first direction are connected to the first surface 113 and the second surface 114, respectively. Simultaneously, one side of the fourth surface 116 along the third direction is connected to the third surface 115. The first direction, the second direction, and the third direction are all perpendicular to each other.
[0072] The connection method between the insulating cover 11 and the housing 2 is not specifically limited here. For example, the insulating cover 11 and the housing 2 can be connected by welding, riveting, or other methods.
[0073] In the embodiments provided in this application, the insulating cover 11 and the housing 2 can be snapped together.
[0074] For example, one of a protrusion 112 and a slot that cooperate with each other can be provided on the insulating cover 11, and correspondingly, the other of a protrusion 112 and a slot can be provided on the housing 2. When the protrusion 112 cooperates with the slot, the insulating cover 11 and the housing 2 are engaged.
[0075] In practice, a protrusion 112 can be provided on the housing 2, and a slot can be provided on the insulating cover 11. Alternatively, a slot can be provided on the housing 2, and a protrusion 112 can be provided on the insulating cover 11.
[0076] In the embodiments provided in this application, the insulating cover 11 is provided with a protrusion 112, and correspondingly, the slot is provided on the housing 2.
[0077] Specifically, protrusions 112 are provided on the side of the first surface 113 away from the third surface 115 and on the side of the second surface 114 away from the third surface 115, such as... Figure 4 and Figure 5 As shown.
[0078] The first arc-isolating plate 12 is disposed in the arc-isolating space. The first arc-isolating plate 12 is detachably disposed on the insulating cover 11. N-1 first arc-isolating plates 12 are used to divide the arc-isolating space into N arc-isolating cavities. The N arc-isolating cavities are arranged sequentially along the first direction.
[0079] In practice, the first arc-blocking plate 12 can be a melamine board, but it is not limited to this.
[0080] The number of the first arc-blocking plates 12 can be one, two, three or more, and no specific limit is made here.
[0081] When the number of first arc-blocking plates 12 is one, that is, N equals 2, one first arc-blocking plate 12 can divide the arc-blocking space into two arc-blocking cavities, which are arranged sequentially along the first direction.
[0082] When there are two first arc-blocking plates 12, i.e., N equals 3, the two first arc-blocking plates 12 can divide the arc-blocking space into three arc-blocking cavities.
[0083] In practice, the number of first arc-blocking plates 12 depends on the number of arc-extinguishing chambers 21.
[0084] In the embodiments provided in this application, the number of first arc-blocking plates 12 is one less than the number of arc-extinguishing chambers 21. In this way, the number of arc-blocking cavities is the same as the number of arc-extinguishing chambers 21, ensuring that one arc-blocking cavity corresponds to one arc-extinguishing chamber 21.
[0085] The arc-isolating cavity corresponds to the arc-extinguishing chamber 21. The arc-isolating cavity is connected to the corresponding arc-extinguishing chamber 21 through the first air outlet, so that the electric arc generated during the separation of the moving contact and the stationary contact can flow out of the arc-extinguishing chamber 21 through the first air outlet along with the high-temperature and high-pressure gas.
[0086] The first arc-isolating plate 12 is detachably mounted on the insulating cover 11. It can be flexibly installed or removed as needed, ensuring arc isolation while also improving the versatility and flexibility of the arc-isolating cover 1. The detachable nature of the first arc-isolating plate 12 means that when the insulating cover 11 or the first arc-isolating plate 12 requires maintenance, the entire arc-isolating cover 1 does not need to be disassembled, saving time and labor costs, and reducing the risk of equipment damage due to disassembly. Furthermore, the detachable nature of the first arc-isolating plate 12 means that when the insulating cover 11 or the first arc-isolating plate 12 needs replacement, the entire arc-isolating cover 1 does not need to be replaced, saving costs.
[0087] Furthermore, in actual use, depending on the structure of the circuit breaker in the actual application, the first arc-blocking plate 12 can be installed on the insulating cover 11, or the first arc-blocking plate 12 can be removed from the insulating cover 11.
[0088] Specifically, now with Figures 1 to 3 The following is a detailed explanation using a circuit breaker with three arc-extinguishing chambers 21 as an example.
[0089] like Figures 1 to 3 The circuit breaker shown has three outgoing terminals. For ease of description, these three outgoing terminals are defined as the first outgoing terminal 31, the second outgoing terminal 32, and the third outgoing terminal 33.
[0090] like Figure 1 As shown, the first outgoing terminal 31 and the second outgoing terminal 32 are connected via a shorting block 6. The third outgoing terminal 33 is connected to one end of the second connecting block 5.
[0091] like Figure 2 As shown, the first outgoing terminal 31 and the second outgoing terminal 32 are connected via a shorting block 6. The third outgoing terminal 33 is connected to one end of the first connecting block 4.
[0092] In this case, during the process of installing the arc-blocking cover 1 onto the housing 2, in order to avoid the extension 62 of the shorting bar 6, the first arc-blocking plate 12 located between the first outgoing terminal 31 and the second outgoing terminal 32 can be removed from the insulating cover 11.
[0093] In addition, when the second outgoing terminal 32 and the third outgoing terminal 33 are connected by the shorting block 6, and the first outgoing terminal 31 is connected to one end of the first connecting block 4 or the second connecting block 5, in order to avoid the extension 62 of the shorting block 6, the first arc-blocking plate 12 located between the second outgoing terminal 32 and the third outgoing terminal 33 can be removed from the insulating cover 11.
[0094] like Figure 3 As shown, the first outgoing terminal 31 is connected to one end of a second connecting row 5, the second outgoing terminal 32 is connected to one end of the first connecting row 4, and the third outgoing terminal 33 is connected to one end of another second connecting row 5.
[0095] In this case, during the process of installing the arc-blocking cover 1 onto the housing 2, the first arc-blocking plates 12 on the insulating cover 11 can all be retained.
[0096] As can be seen from the above, the arc-blocking cover 1 provided in this application embodiment can be configured to either mount the first arc-blocking plate 12 on the insulating cover 11 or remove the first arc-blocking plate 12 from the insulating cover 11, depending on the structure of the circuit breaker in actual application. That is, when the circuit breaker has a short-circuit bar 6, the first arc-blocking plate 12 at the corresponding position can be removed; when the circuit breaker does not have a short-circuit bar 6, the first arc-blocking plate 12 can be retained.
[0097] In other words, the arc-isolating shield 1 provided in this application embodiment can be used with circuit breakers of various structures, thus expanding the scope of application of the arc-isolating shield 1. During production, it can save on mold costs and parts costs, and in use, it can be used with circuit breakers of various wiring configurations, thus having a wide range of applications.
[0098] In practice, the detachable connection between the first arc-blocking plate 12 and the insulating cover 11 can be achieved through a threaded connection structure or by snap-fit, but it is not limited to these methods.
[0099] In one possible implementation, such as Figure 5 As shown, the insulating cover 11 is provided with a first track groove group corresponding to the first arc-blocking plate 12. The first track groove group includes two opposing first track grooves 13. The first track grooves 13 extend along the second direction, and the two sides of the first arc-blocking plate 12 along the third direction are respectively inserted into the two first track grooves 13.
[0100] Thus, with Figure 4 and Figure 5Taking the placement of the insulating cover 11 as an example, the first arc-blocking plate 12 can be inserted into the first track groove 13 from below the insulating cover 11 and move along the length of the first track groove 13. At the same time, the relative position between the first arc-blocking plate 12 and the insulating cover 11 can be adjusted according to actual needs to improve the flexibility and versatility of the arc-blocking cover 1.
[0101] It should be noted that the width of the first track groove 13 can be slightly smaller than the thickness of the first arc-blocking plate 12, so as to prevent the first arc-blocking plate 12 from sliding relative to the insulating cover 11 and to ensure the stability of the first arc-blocking plate 12 on the insulating cover 11.
[0102] The surface of the first arc-blocking plate 12 can be parallel to the second and third directions. In this case, the thickness of the first arc-blocking plate 12 refers to the dimension of the first arc-blocking plate 12 in the first direction.
[0103] As an optional approach, combined Figures 1 to 4 The arc-blocking cover 1 also includes N second arc-blocking plates 14 arranged sequentially along a first direction, and the second arc-blocking plates 14 are disposed on the insulating cover 11. The second arc-blocking plates 14 correspond to the arc-blocking cavities and are located within the arc-blocking cavities. The second arc-blocking plates 14 are used to divide the arc-blocking cavities into a first arc-blocking cavity and a second arc-blocking cavity arranged sequentially along a third direction. The first arc-blocking cavity is located on the side closer to the arc-extinguishing chamber 21. The first direction and the third direction are perpendicular to each other.
[0104] At this time, the second arc-blocking plate 14 can enhance the blocking effect on the electric arc, further reduce the risk of the electric arc being ejected from the arc-blocking cover 1, and reduce the risk of the electric arc breaking through the external equipment parts of the arc-blocking cover.
[0105] In addition, when the circuit breaker includes a shorting bar 6, it can prevent electric arcs from striking the extension 62, reducing the risk of phase-to-phase breakdown caused by electric arcs.
[0106] The number of second arc-blocking plates 14 is the same as the number of arc-extinguishing chambers 21, and they correspond one-to-one. The surface of the second arc-blocking plate 14 can be parallel to the first direction and the second direction.
[0107] Furthermore, such as Figure 4 and Figure 11 As shown, a second air outlet 141 is provided on the upper part of the second arc-blocking plate 14 along the second direction.
[0108] Thus, the second outlet 141 is designed to allow high-temperature, high-pressure gas to flow out through the second outlet 141 and below the insulating cover 11, thereby accelerating the flow speed of the high-temperature, high-pressure gas. At the same time, the second outlet 141 is located on the upper part of the second arc-blocking plate 14 along the second direction, which can reduce the risk of phase-to-phase breakdown caused by an electric arc striking the extension 62.
[0109] It should be noted that, in the embodiments provided in this application, the upper part of the second arc-blocking plate 14 along the second direction refers to the side of the second arc-blocking plate 14 that is close to the fourth surface 116.
[0110] Meanwhile, the number of second air outlets 141 is multiple, which can accelerate the flow speed of high-temperature and high-pressure gas. Multiple second air outlets 141 can be arranged in an array on the second arc-blocking plate 14, but in practice, they are not limited to this.
[0111] The second arc-blocking plate 14 can be integrally formed with the insulating cover 11. Of course, the second arc-blocking plate 14 can also be fixed on the insulating cover 11 by welding, riveting or other methods. No specific limitation is made here, and the actual situation shall prevail.
[0112] As an example, the second arc-blocking plate 14 is detachably disposed on the insulating cover 11.
[0113] In this way, the second arc-isolating plate 14 can be flexibly installed or removed according to actual needs, ensuring the arc-isolating effect while also improving the versatility and flexibility of the arc-isolating cover 1. The second arc-isolating plate 14 is detachable, so when the insulating cover 11 or the second arc-isolating plate 14 needs maintenance, it is not necessary to disassemble the entire arc-isolating cover 1, thus saving time and labor costs, and also reducing the risk of equipment damage caused by disassembly. The second arc-isolating plate 14 is also detachable, so when the insulating cover 11 or the second arc-isolating plate 14 needs replacement, it is not necessary to replace the entire arc-isolating cover 1, saving costs.
[0114] In practice, the detachable connection between the second arc-isolating plate 14 and the insulating cover 11 can be achieved through a threaded connection structure or by snap-fit, but it is not limited to these methods in practice.
[0115] As one possible implementation, such as Figure 4 and Figure 5 The insulating cover 11 is provided with a second track groove group corresponding to the second arc-blocking plate 14. The second track groove group includes two opposing second track grooves 16. The second track grooves 16 extend along a second direction, and the two sides of the second arc-blocking plate 14 along the first direction are respectively inserted into the two second track grooves 16.
[0116] Thus, with Figure 4 and Figure 5 Taking the placement of the insulating cover 11 as an example, the second arc-blocking plate 14 can be inserted into the second track groove 16 from below the insulating cover 11 and move along the length of the second track groove 16. At the same time, the relative position between the second arc-blocking plate 14 and the insulating cover 11 can be adjusted according to actual needs, improving the flexibility and versatility of the arc-blocking cover 1.
[0117] It should be noted that the width of the second track groove 16 can be slightly smaller than the thickness of the second arc-blocking plate 14, so as to prevent the second arc-blocking plate 14 from sliding relative to the insulating cover 11 and to ensure the stability of the second arc-blocking plate 14 on the insulating cover 11.
[0118] The surface of the second arc-blocking plate 14 can be parallel to the first and second directions. In this case, the thickness of the second arc-blocking plate 14 refers to its dimension in the third direction.
[0119] As one possible implementation, see Figures 4 to 6 The insulating cover 11 includes an insulating cover body and a plurality of detachable parts 111. The insulating cover body is disposed on the housing 2. The plurality of detachable parts 111 are disposed on the insulating cover body and can be detached from the insulating cover body under the action of external force. The detachable parts 111 correspond to the side of the insulating cover body away from the arc-extinguishing chamber 21 and the two sides of the insulating cover body along the first direction.
[0120] Thus, in practical situations, depending on the specific structure of the circuit breaker, the corresponding break-off part 111 can be detached from the insulating cover body. This improves the flexibility and versatility of the arc-damping cover 1 provided in this embodiment, expanding its application scope.
[0121] Specifically, please combine Figure 1 and Figure 4 As shown. The second connecting row 5 is configured such that, when the arc-blocking cover 1 is installed on the housing 2, in order to avoid the second connecting row 5, the break-off portion 111 provided on the first surface 113 can be detached from the insulating cover body, while the remaining break-off portions 111 can be retained.
[0122] Combination Figure 2 and Figure 4 As shown, the first connecting row 4 is configured such that when the arc-blocking cover 1 is installed on the housing 2, in order to avoid the first connecting row 4, the break-off portion 111 provided on the third surface 115 can be detached from the insulating cover body, while the remaining break-off portions 111 can be retained.
[0123] Combination Figure 3 and Figure 4 As shown, the arrangement of the two second connecting rows 5 allows the break-off portions 111 provided on the first surface 113 and the second surface 114 to be detached from the insulating cover body in order to avoid the two second connecting rows 5 when the arc-blocking cover 1 is installed on the housing 2. The remaining break-off portions 111 can be retained.
[0124] Furthermore, there are multiple break-off portions 111 corresponding to the side of the insulating cover body away from the arc-extinguishing chamber 21, and these multiple break-off portions 111 correspond to the arc-extinguishing cavity.
[0125] At this point, the corresponding break-off part 111 can be detached from the insulating cover 11 according to actual needs, ensuring the arc isolation effect while improving the flexibility and versatility of the arc isolation cover 1 provided in this application embodiment and expanding the scope of application.
[0126] As an alternative, the insulating cover 11 is provided with multiple third air outlets 15.
[0127] This allows the high-temperature, high-pressure gas to flow out through the third outlet 15, thereby accelerating the flow rate of the high-temperature, high-pressure gas.
[0128] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
Claims
1. An arc-blocking cover for a circuit breaker, characterized in that, The circuit breaker has a housing, within which N arc-extinguishing chambers are arranged sequentially along a first direction, where N is an integer greater than or equal to 2; a first air outlet is provided on the same side corresponding to each of the arc-extinguishing chambers; an arc-isolating shield is disposed on the housing, and the arc-isolating shield is located on the air outlet side of the first air outlet; the arc-isolating shield includes: An insulating cover is disposed on the housing; the insulating cover and the housing enclose an arc-isolating space. N-1 first arc-isolating plates are disposed within the arc-isolating space; the first arc-isolating plates are detachably disposed on the insulating cover, and the N-1 first arc-isolating plates are used to divide the arc-isolating space into N arc-isolating cavities, the N arc-isolating cavities being arranged sequentially along the first direction; the arc-isolating cavities correspond to the arc-extinguishing chambers, and the arc-isolating cavities are connected to the corresponding arc-extinguishing chambers through the first air outlets.
2. The arc-blocking cover according to claim 1, characterized in that, The insulating cover is provided with a first track groove group corresponding to the first arc-blocking plate. The first track groove group includes two opposing first track grooves. The first track grooves extend along the second direction, and the two sides of the first arc-blocking plate along the third direction are respectively inserted into the two first track grooves. The first direction, the second direction, and the third direction are perpendicular to each other.
3. The arc-blocking cover according to claim 1, characterized in that, The arc-blocking cover further includes N second arc-blocking plates arranged sequentially along the first direction, the second arc-blocking plates being disposed on the insulating cover; the second arc-blocking plates correspond to the arc-blocking cavity, the second arc-blocking plates being located within the arc-blocking cavity, the second arc-blocking plates being used to divide the arc-blocking cavity into a first arc-blocking cavity and a second arc-blocking cavity arranged sequentially along a third direction, the first arc-blocking cavity being located on the side closer to the arc-extinguishing chamber, the first direction being perpendicular to the third direction.
4. The arc-blocking cover according to claim 3, characterized in that, The second arc-blocking plate has a second air outlet at its upper part along the second direction, and the first direction, the second direction, and the third direction are perpendicular to each other.
5. The arc-blocking cover according to claim 3, characterized in that, The second arc-blocking plate is detachably mounted on the insulating cover.
6. The arc-blocking cover according to claim 4, characterized in that, The insulating cover is provided with a second track groove group corresponding to the second arc-blocking plate. The second track groove group includes two opposing second track grooves. The second track grooves extend along the second direction, and the two sides of the second arc-blocking plate along the first direction are respectively inserted into the two second track grooves.
7. The arc-blocking cover according to claim 1, characterized in that, The insulating cover includes: An insulating cover body is disposed within the housing; Multiple detachable parts are disposed on the insulating cover body; the detachable parts can be detached from the insulating cover body under the action of external force; the detachable parts correspond to the side of the insulating cover body away from the arc-extinguishing chamber and the two sides of the insulating cover body along the first direction.
8. The arc-blocking cover according to claim 7, characterized in that, The number of the break-off portions corresponding to the side of the insulating cover body away from the arc-extinguishing chamber is multiple, and the multiple break-off portions correspond to the arc-extinguishing cavity.
9. The arc-blocking cover according to claim 1, characterized in that, The insulating cover is provided with multiple third air outlets.
10. A circuit breaker, characterized in that, include: The housing contains N arc-extinguishing chambers arranged sequentially along a first direction, where N is an integer greater than or equal to 2. Multiple wiring terminals are disposed on the housing; the wiring terminals correspond to the arc-extinguishing chamber. The arc-blocking shield as described in any one of claims 1 to 9, wherein the arc-blocking shield is disposed on the housing.