A circuit breaker

Abstract

The utility model provides a circuit breaker relates to electrical equipment technical field. Circuit breaker includes installation shell, contact mechanism, insulating pull rod, first connecting conductor and second connecting conductor. Installation shell is made of insulating material, and installation shell is provided with a plurality of electrical passageways, and is provided with the isolation between two adjacent electrical passageways Department, every electrical passageway all is provided with contact mechanism, insulating pull rod, first connecting conductor and second connecting conductor, and insulating pull rod is connected with contact mechanism, is used for driving contact mechanism to close or open, and one end of first connecting conductor and second connecting conductor all is connected with contact mechanism, and the other end all stretches out installation shell outside, to form the electric loop in first connecting conductor, contact mechanism and second connecting conductor. Thus can see, optimized the insulating layout of circuit breaker, to improve the electrical safety and operation reliability of circuit breaker under complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to a circuit breaker. Background Technology

[0002] As a critical protective device in power distribution systems, the performance stability and safety of vacuum circuit breakers highly depend on reasonable insulation design. Although vacuum bulbs possess excellent arc-extinguishing and insulation capabilities in high-vacuum environments, improper design of their insulation structure within the entire unit will directly affect the overall insulation level and operational reliability.

[0003] Some existing vacuum circuit breakers have insufficient consideration in terms of creepage distance, air gap, and insulation material selection, leading to problems such as local electric field concentration, surface discharge, and even breakdown. In particular, the insulation performance deteriorates significantly in complex environments, posing safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a circuit breaker that optimizes the insulation layout of the circuit breaker to improve its electrical safety and operational reliability under complex operating conditions.

[0005] The embodiments of this utility model are implemented as follows: In a first aspect, this utility model provides a circuit breaker, including a mounting housing, a contact mechanism, an insulating pull rod, a first connecting conductor, and a second connecting conductor; The mounting housing is made of insulating material, and the mounting housing is provided with multiple electrical channels, with an isolation part provided between two adjacent electrical channels; Each of the electrical channels is provided with the contact mechanism, the insulating pull rod, the first connecting conductor, and the second connecting conductor. The insulating pull rod is connected to the contact mechanism and is used to drive the contact mechanism to close or open. One end of the first connecting conductor and the second connecting conductor are both connected to the contact mechanism, and the other end extends out of the mounting housing to form an electrical circuit in the first connecting conductor, the contact mechanism, and the second connecting conductor.

[0006] In an optional embodiment, the outer wall of the insulating rod is provided with at least one first isolation structure, which is a groove or a rib.

[0007] In an optional embodiment, the mounting housing is provided with at least one second isolation structure within the electrical channel, the second isolation structure being a groove or a rib.

[0008] In an optional embodiment, the mounting housing includes a base and a base, the base being disposed on the base to jointly form a plurality of electrical channels, the base being provided with a first isolation portion, the base being provided with a second isolation portion, the first isolation portion and the second isolation portion being correspondingly disposed to jointly constitute the isolation portion; Wherein, the first isolation part is a groove and the second isolation part is a rib, or the first isolation part is a rib and the second isolation part is a groove.

[0009] In an optional embodiment, the mounting housing further includes a cover plate, and the top of the base and the pedestal are provided with an opening, the cover plate being detachably disposed at the opening.

[0010] In an optional embodiment, the outer wall of the mounting housing is further provided with at least one partition, which is disposed corresponding to the isolation portion. The partition is located between the ends of two adjacent first connecting conductors extending out of the mounting housing and between the ends of two adjacent second connecting conductors extending out of the mounting housing.

[0011] In an optional embodiment, two third isolation portions are further provided on the outer walls of both sides of the mounting housing. The two third isolation portions are respectively located on both sides of the ends of the plurality of first connecting conductors and the plurality of second connecting conductors located outside the mounting housing.

[0012] In an optional embodiment, the circuit breaker further includes a drive link passing through the plurality of electrical channels, and the drive link being kinetically connected to the insulating pull rod in each of the electrical channels.

[0013] In an optional embodiment, the mounting housing is provided with insulating pads, and the two ends of the transmission link are respectively movably connected to the two insulating pads.

[0014] In an optional embodiment, the circuit breaker further includes a vacuum bulb, and the contact mechanism includes a moving contact and a stationary contact. The moving contact is movably disposed in the vacuum bulb and connected to the first connecting conductor, and the stationary contact is disposed in the vacuum bulb and connected to the second connecting conductor.

[0015] The beneficial effects of the circuit breaker provided in this embodiment include: the transmission connection between the contact mechanism and the operating mechanism is achieved through the insulating pull rod, ensuring that the insulating pull rod and the operating mechanism are not energized, thereby effectively ensuring operational safety and the insulation safety of the secondary circuit; in addition, the creepage distance is effectively increased by setting an isolation part between adjacent electrical channels, thereby improving the insulation performance of multiple electrical channels; moreover, by using an insulating mounting housing, only the first connecting conductor and the second connecting conductor are electrically connected to external electrical components, further improving the overall insulation performance of the circuit breaker and ensuring the reliability and external safety of the circuit breaker operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the mounting housing structure provided for an embodiment of this utility model; Figure 2 A cross-sectional view of a circuit breaker provided in an embodiment of this utility model; Figure 3 A partial sectional view of the circuit breaker provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the circuit breaker structure provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the circuit breaker structure provided in an embodiment of the present utility model.

[0018] Icons: 10-Circuit breaker; 100-Mounting housing; 110-Electrical passage; 120-Isolation section; 121-First isolation section; 122-Second isolation section; 130-Second isolation structure; 140-Base; 150-Staple; 160-Cover plate; 170-Opening; 180-Partition plate; 190-Third isolation section; 200-Contact mechanism; 210-Moving contact; 220-Stationary contact; 300-Insulating rod; 310-First isolation structure; 400-First connecting conductor; 500-Second connecting conductor; 600-Transmission link; 610-Insulating pad; 700-Vacuum bulb; 800-Operating mechanism. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Traditional vacuum circuit breakers are typically used in high-voltage (e.g., 12kV) power distribution systems. To meet insulation requirements under high-voltage conditions, sufficient creepage distance must be ensured. According to relevant standards, the creepage distance at this voltage level typically needs to be above 160mm. Therefore, vacuum circuit breakers generally adopt a "solid-sealed pole" structure, encapsulating the vacuum bulb entirely within insulating material to achieve complete sealing and excellent insulation performance, while also improving mechanical strength and environmental adaptability.

[0026] However, with the increasing application of vacuum circuit breakers in low-voltage applications, such as products with a rated voltage of AC3300V, the creepage distance requirement has been reduced to approximately 63mm. In this context, there is no longer a need for fully sealed vacuum bulbs, thus providing greater flexibility in structural design. These products can utilize and share many mature components from traditional low-voltage frame circuit breakers, achieving modular design and cost control.

[0027] Some existing vacuum circuit breakers have insufficient consideration in terms of creepage distance, air gap, and insulation material selection, leading to problems such as local electric field concentration, surface discharge, and even breakdown. In particular, the insulation performance deteriorates significantly in complex environments, posing safety hazards.

[0028] For new medium- and low-voltage vacuum circuit breakers, in order to achieve the common design of components with traditional air-insulated frame circuit breakers, the original fully sealed solid pole structure is usually simplified. While reducing costs, this also places higher demands on the stability of the insulation system. Therefore, it is urgent to optimize the insulation layout to improve its electrical safety and operational reliability under complex operating conditions.

[0029] Based on the problems existing in the current technology, please refer to Figures 1 to 5 This utility model provides a circuit breaker 10, which optimizes the insulation layout of the circuit breaker 10 to improve the electrical safety and operational reliability of the circuit breaker 10 under complex operating conditions.

[0030] In detail, the circuit breaker 10 includes a mounting housing 100, a contact mechanism 200, an insulating pull rod 300, a first connecting conductor 400, and a second connecting conductor 500.

[0031] The mounting housing 100 is made of insulating material, and the mounting housing 100 is provided with multiple electrical channels 110, and an isolation part 120 is provided between two adjacent electrical channels 110. Each electrical channel 110 is equipped with a contact mechanism 200, an insulating pull rod 300, a first connecting conductor 400, and a second connecting conductor 500. The insulating pull rod 300 is connected to the contact mechanism 200 and is used to drive the contact mechanism 200 to close or open. One end of the first connecting conductor 400 and the second connecting conductor 500 are both connected to the contact mechanism 200, and the other end extends out of the mounting housing 100 to form an electrical circuit with the first connecting conductor 400, the contact mechanism 200, and the second connecting conductor 500.

[0032] In this embodiment, the contact mechanism 200 and the operating mechanism 800 are connected by an insulating pull rod 300, ensuring that the insulating pull rod 300 and the operating mechanism 800 are not energized, thereby effectively ensuring operational safety and the insulation safety of the secondary circuit. In addition, the creepage distance is effectively increased by setting an isolation part 120 between adjacent electrical channels 110, thereby improving the insulation performance of multiple electrical channels 110. Moreover, by using an insulating mounting housing 100, only the first connecting conductor 400 and the second connecting conductor 500 are electrically connected to external electrical components, further improving the overall insulation performance of the circuit breaker 10 and ensuring the reliability and external safety of the circuit breaker 10.

[0033] Specifically, the outer wall of the insulating tie rod 300 is provided with at least one first isolation structure 310, which is a groove or a rib.

[0034] Therefore, the first isolation structure 310 with its grooved or ribbed upper part on the insulating rod 300 can effectively increase the creepage distance (e.g., Figure 3 (As shown by the dashed line in the middle a), further improving the insulation performance of the insulating tie rod 300.

[0035] Furthermore, the mounting housing 100 has at least one second isolation structure 130 within the electrical channel 110. The second isolation structure 130 is a groove or a rib, which effectively increases the creepage distance (e.g., through the grooved or ribbed structure of the second isolation junction on the mounting housing 100) Figure 3 (as shown by the dashed line in b) to further improve the insulation performance of the mounting housing 100.

[0036] It is worth mentioning that the first isolation structure 310 and the second isolation structure 130 are provided accordingly. Therefore, between the contact mechanism 200 and the operating mechanism 800, there are only creepage paths corresponding to the mounting housing 100 or the insulating pull rod 300. Thus, by providing the first isolation structure 310 on the insulating pull rod 300 and the second isolation structure 130 on the mounting housing 100, the creepage distance can be effectively increased, ensuring the insulation performance of the mounting housing 100.

[0037] Furthermore, the mounting housing 100 includes a base 140 and a base 150. The base 150 covers the base 140 to jointly form a plurality of electrical channels 110. The base 140 is provided with a first isolation portion 121, and the base 150 is provided with a second isolation portion 122. The first isolation portion 121 and the second isolation portion 122 are arranged opposite to each other to jointly form the isolation portion 120.

[0038] In other words, the mounting housing 100 is composed of a base 140 and a base 150, which together form a plurality of electrical channels 110, thereby facilitating the assembly of the contact mechanism 200, the insulating pull rod 300, the first connecting conductor 400 and the second connecting conductor 500 into the electrical channels 110.

[0039] It should be noted that there are multiple first isolation portions 121 and second isolation portions 122. Among the first isolation portions 121 and second isolation portions 122 that are arranged opposite to each other, the first isolation portion 121 is a groove and the second isolation portion 122 is a rib, and the second isolation portion 122 is embedded in the first isolation portion 121; of course, the first isolation portion 121 can also be a rib and the second isolation portion 122 can be a groove, and the first isolation portion 121 can be embedded in the second isolation portion 122.

[0040] In other words, a plurality of first isolation portions 121 and a plurality of second isolation portions 122 are provided in a one-to-one correspondence, wherein some of the first isolation portions 121 are grooves and other parts of the first isolation portions 121 are ribs, and the second isolation portions 122 corresponding to the grooved first isolation portions 121 are ribs, and the second isolation portions 122 corresponding to the ribbed first isolation portions 121 are grooves, so as to ensure that the first isolation portions 121 and the second isolation portions 122 are mutually embedded.

[0041] Furthermore, the mounting housing 100 also includes a cover plate 160, and the top of the base 140 and the base 150 are provided with an opening 170, with the cover plate 160 being detachably disposed in the opening 170.

[0042] In this embodiment, the cover plate 160 can be installed on the opening 170 and cover the opening 170 to provide insulation; when maintenance is required, the cover plate 160 can be removed from the opening 170 to expose the internal electrical components.

[0043] It should be noted that there are multiple openings 170, and each opening 170 is connected to a corresponding electrical channel 110. There are also multiple cover plates 160, which are installed on the openings 170 to enable the maintenance of electrical components in a single electrical channel 110.

[0044] Furthermore, the outer wall of the mounting housing 100 is provided with at least one partition 180, which is correspondingly provided with the isolation part 120. The partition 180 is located between the ends of two adjacent first connecting conductors 400 extending out of the mounting housing 100 and between the ends of two adjacent second connecting conductors 500 extending out of the mounting housing 100.

[0045] In other words, the partition 180 is located on the outer wall of the mounting housing 100 between two adjacent electrical channels 110, thereby isolating the first connecting conductor 400 and the second connecting conductor 500 of the two adjacent electrical channels 110 extending outside the mounting housing 100. This increases the creepage distance of the first connecting conductor 400 and the second connecting conductor 500 of the two adjacent electrical channels 110 extending outside the mounting housing 100, further improving the insulation performance of the mounting housing 100.

[0046] Furthermore, two third isolation portions 190 are provided on the outer walls of both sides of the mounting housing 100. The two third isolation portions 190 are located on both sides of the ends of the plurality of first connecting conductors 400 and the plurality of second connecting conductors 500 located outside the mounting housing 100, thereby ensuring that there is sufficient creepage distance between the first connecting conductors 400 and the second connecting conductors 500 extending out of the mounting housing 100 and the side walls of the mounting housing 100, further improving the insulation performance of the mounting housing 100.

[0047] Specifically, both the partition 180 and the third isolation section 190 are mounted on the base 150.

[0048] Furthermore, in order to ensure the synchronous movement of the contact mechanisms 200 in the multiple electrical channels 110 under the drive of the operating mechanism 800, the circuit breaker 10 also includes a transmission link 600, which passes through the multiple electrical channels 110 and is connected to the insulating pull rod 300 in each electrical channel 110.

[0049] Therefore, when the operating mechanism 800 drives the contact mechanism 200 to close or open via the insulating pull rod 300, it also drives the transmission link 600 to move synchronously. Thus, the transmission link 600 drives the insulating pull rods 300 and the contact mechanism 200 in all other electrical channels 110 to move synchronously, so as to achieve synchronous closing or opening.

[0050] To ensure the insulation between the transmission link 600 and the mounting housing 100, the mounting housing 100 is provided with insulating pads 610, and the two ends of the transmission link 600 are respectively movably connected to the two insulating pads 610.

[0051] Furthermore, the circuit breaker 10 also includes a vacuum bulb 700, and the contact mechanism 200 includes a moving contact 210 and a stationary contact 220. The moving contact 210 is movably disposed in the vacuum bulb 700 and connected to the first connecting conductor 400, and the stationary contact 220 is disposed in the vacuum bulb 700 and connected to the second connecting conductor 500.

[0052] In this embodiment, by placing the moving contact 210 and the stationary contact 220 inside the vacuum bubble 700, the electric arc generated when the moving contact 210 and the stationary contact 220 separate will be extinguished naturally in a very short time. Furthermore, the vacuum environment provided by the vacuum bubble 700 has a much higher insulation strength than air or other media, thus enabling higher voltage level isolation to be achieved in a smaller space, thereby reducing the size of the circuit breaker 10.

[0053] In summary, this utility model provides a circuit breaker 10 that uses an insulating pull rod 300 to achieve a transmission connection between the contact mechanism 200 and the operating mechanism 800, ensuring that the insulating pull rod 300 and the operating mechanism 800 are not energized, thereby effectively guaranteeing operational safety and the insulation safety of the secondary circuit. Furthermore, by setting an isolation part 120 between adjacent electrical channels 110, the creepage distance is effectively increased, thereby improving the insulation performance of multiple electrical channels 110. Moreover, by using an insulating mounting housing 100, only the first connecting conductor 400 and the second connecting conductor 500 are electrically connected to external electrical components, further improving the overall insulation performance of the circuit breaker 10 and ensuring the reliability and external safety of the circuit breaker 10.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circuit breaker, characterized in that, It includes a mounting housing (100), a contact mechanism (200), an insulating pull rod (300), a first connecting conductor (400), and a second connecting conductor (500); The mounting housing (100) is made of insulating material and is provided with a plurality of electrical channels (110), and an isolation portion (120) is provided between two adjacent electrical channels (110). Each of the electrical channels (110) is provided with the contact mechanism (200), the insulating pull rod (300), the first connecting conductor (400), and the second connecting conductor (500). The insulating pull rod (300) is connected to the contact mechanism (200) and is used to drive the contact mechanism (200) to close or open. One end of the first connecting conductor (400) and the second connecting conductor (500) are both connected to the contact mechanism (200), and the other end extends out of the mounting housing (100) to form an electrical circuit in the first connecting conductor (400), the contact mechanism (200), and the second connecting conductor (500).

2. The circuit breaker according to claim 1, characterized in that, The outer wall of the insulating tie rod (300) is provided with at least one first isolation structure (310), which is a groove or a rib.

3. The circuit breaker according to claim 1 or 2, characterized in that, The mounting housing (100) is provided with at least one second isolation structure (130) in the electrical channel (110), the second isolation structure (130) being a groove or a rib.

4. The circuit breaker according to claim 1, characterized in that, The mounting housing (100) includes a base (140) and a base (150). The base (150) covers the base (140) to form a plurality of electrical channels (110). The base (140) is provided with a first isolation part (121), and the base (150) is provided with a second isolation part (122). The first isolation part (121) and the second isolation part (122) are correspondingly provided to jointly constitute the isolation part (120). Wherein, the first isolation part (121) is a groove and the second isolation part (122) is a rib, or the first isolation part (121) is a rib and the second isolation part (122) is a groove.

5. The circuit breaker according to claim 4, characterized in that, The mounting housing (100) also includes a cover plate (160), and the top of the base (140) and the base (150) are provided with an opening (170), and the cover plate (160) is detachably disposed in the opening (170).

6. The circuit breaker according to claim 1, characterized in that, The outer wall of the mounting housing (100) is also provided with at least one partition (180), the partition (180) is provided corresponding to the isolation part (120), the partition (180) is located between the ends of two adjacent first connecting conductors (400) extending out of the mounting housing (100), and between the ends of two adjacent second connecting conductors (500) extending out of the mounting housing (100).

7. The circuit breaker according to claim 1, characterized in that, The outer walls of both sides of the mounting housing (100) are also provided with two third isolation parts (190), which are located on both sides of the ends of the plurality of first connecting conductors (400) and the plurality of second connecting conductors (500) located outside the mounting housing (100).

8. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a transmission link (600) that passes through a plurality of electrical channels (110) and is tractively connected to an insulating pull rod (300) in each of the electrical channels (110).

9. The circuit breaker according to claim 8, characterized in that, The mounting housing (100) is provided with an insulating pad (610), and the two ends of the transmission connecting rod (600) are respectively movably connected to the two insulating pads (610).

10. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a vacuum bulb (700), and the contact mechanism (200) includes a moving contact (210) and a stationary contact (220). The moving contact (210) is movably disposed in the vacuum bulb (700) and connected to the first connecting conductor (400), and the stationary contact (220) is disposed in the vacuum bulb (700) and connected to the second connecting conductor (500).

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