Intelligent miniature circuit breaker
By designing an intelligent micro circuit breaker, using a 250A shell-level structure and wiring layout, the existing circuit breaker's protection and current distribution problems are solved, and efficient current on-off and temperature rise management is achieved, meeting the needs of 5G communication cabinets.
Patent Information
- Application Number
- CN202422149359.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing micro plug-in circuit breakers are prone to cause the contacts of the two-pole circuit breakers to be out of synchronization during closing, opening and tripping protection, resulting in the current of one electrode being greater than the rated current, affecting the electrical life and burning the contacts; at the same time, the resistance of the two-pole circuit cannot be guaranteed to be the same, resulting in the current of the parallel electrode exceeding the rated current and the temperature rise is unqualified.
A smart micro circuit breaker is designed, using a 250A shell frame level, and the circuit is turned on and off by setting dynamic contacts, tail plugs, static contacts, through-pole wiring rows and negative electrode wiring rows in the shell, and using conductors and manganese copper shunts to achieve the circuit on and off to ensure even distribution of current.
It realizes the maximum 250A DC current on and off under the unchanged internal space of the circuit breaker, and the temperature rises through the use process, meeting the service life and integration needs of 5G communication cabinets.
Smart Images
Figure CN222980429U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of low-voltage electrical appliances, and particularly relates to an intelligent miniature circuit breaker. Background Art
[0002] 5G communication is a strategic industry strongly supported by the state, and the construction of 5G networks is in full swing. Currently, there is no 250A frame product for ordinary miniature plug-in circuit breakers in the power distribution industry. In actual use, two 125A circuit breakers are used in parallel. The following problems exist: during closing, opening, and tripping protection, it is easy for the contacts of the two-pole circuit breaker to act out of sync, resulting in the current of a certain pole being greater than the rated current, affecting its electrical life and burning out the contacts; in addition, the loop resistances of the two poles cannot be guaranteed to be the same, causing the current of a certain pole in the two-pole parallel connection to exceed the rated current, resulting in unqualified temperature rise. Moreover, using two poles in parallel does not conform to the trend of integration. Due to the above disadvantages, the existing miniature plug-in circuit breakers cannot meet the service life and integration requirements of 5G communication cabinets. Therefore, there is an urgent need to design a miniature plug-in circuit breaker product with a 250A frame specifically for 5G requirements. Summary of the Utility Model
[0003] To solve the above problems, the purpose of the utility model is to provide an intelligent miniature circuit breaker that meets 5G requirements and has a 250A frame rating.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] An intelligent miniature circuit breaker includes a housing, and a moving contact, a tail plug, a static contact, a straight-through pole wiring row, and a negative pole wiring row respectively arranged inside the housing; two sockets are concavely formed at the tail of the housing, namely socket one and socket two, and a tail plug is arranged in each socket; two terminal wiring components are arranged at the head of the housing, namely terminal wiring component one and terminal wiring component two, and each terminal wiring component includes two wiring terminals; one end of the static contact is connected to the tail plug in socket one, and the other end is correspondingly arranged with the moving contact and can be closed or separated from each other; one end of the straight-through pole wiring row is respectively connected to the two wiring terminals of terminal wiring component one, and the other end is connected to the tail plug in socket two; one end of the negative pole wiring row is connected to the moving contact, and the other end is respectively connected to the two wiring terminals of terminal wiring component two; the straight-through pole wiring row and the negative pole wiring row are both in a flat plate structure and are arranged on the inner wall of the wide surface of the housing parallel to the wide surface of the housing.
[0006] Furthermore, both socket one and socket two are parallel to the wide surface of the housing, and two tail plugs are arranged side by side in each socket. The two tail plugs have slots with openings facing outside the socket, and in the same socket, the slots of the two tail plugs are on the same plane.
[0007] Further, a wiring board parallel to the wide surface of the housing is inserted into each socket. The wiring boards are a positive wiring board and a negative wiring board respectively. The positive wiring board is inserted into socket one and plugged into the slots of the two tail plugs in socket one; the negative wiring board is inserted into socket two and plugged into the slots of the two tail plugs in socket two.
[0008] Further, the moving direction of the moving contact is parallel to the plane where the slots of the tail plugs are located.
[0009] Further, the two wiring terminals of each terminal wiring assembly are arranged staggeredly.
[0010] Further, one end of the straight-through pole wiring row extends two parallel tongue plates up and down to be connected to the two wiring terminals of terminal wiring assembly one one-to-one, realizing the parallel wiring of two staggered cables; the other end of the straight-through pole wiring row extends two tongue plates to be connected to the two tail plugs in socket two one-to-one.
[0011] Further, one end of the static contact is connected to the tail plug in socket one through a conductor.
[0012] Further, a manganese copper shunt is arranged on the static contact, and a U-shaped arc structure is arranged at the end of the static contact.
[0013] Further, the conductor is a metal plate or a flexible conductor; both ends of the conductor are welded to the tail plug (2) and the static contact respectively. A first welding surface is formed at the welding place of the conductor and the tail plug, and a second welding surface is formed at the welding place of the conductor and the static contact; the first welding surface and the second welding surface are perpendicular to each other.
[0014] Further, one end of the negative wiring row is connected to the moving contact through a flexible conductor.
[0015] Further, the other end of the negative wiring row extends two parallel tongue plates up and down to be connected to the two wiring terminals of terminal wiring assembly two one-to-one, realizing the parallel wiring of two staggered cables.
[0016] The utility model makes full use of the internal space of the circuit breaker, has a reasonable structural layout, can realize the on-off of a maximum 250A DC current while ensuring that the internal space of the circuit breaker remains unchanged, has qualified temperature rise during use, and meets the requirements of the service life and integration of the 5G communication cabinet. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The structure of the utility model will be further described in detail below with reference to the drawings.
[0018] Figure 1 It is a schematic diagram of the external structure of the intelligent micro circuit breaker described in the utility model.
[0019] Figure 2 Schematic diagram of the internal structure of the intelligent miniature circuit breaker described in the present utility model.
[0020] Figure 3 Connection structure diagram of the static contact and the tail plug described in the present utility model.
[0021] Figure 4 Connection structure diagram of the through-pole wiring terminal and the tail plug and the first terminal wiring assembly described in the present utility model.
[0022] Figure 5 Schematic diagram of the structure of the through-pole wiring terminal described in the present utility model.
[0023] Figure 6 Connection structure diagram of the through-pole wiring terminal and the second terminal wiring assembly described in the present utility model.
[0024] Figure 7 Schematic diagram of the structure of the through-pole wiring terminal described in the present utility model.
[0025] As shown in the figure: 1 - moving contact, 2 - tail plug, 3 - arc extinguishing chamber, 4 - static contact, 41 - U-shaped arc structure, 42 - manganese copper shunt, 5 - through-pole wiring terminal, 6 - negative wiring terminal, 7 - housing, 71 - socket one, 72 - socket two, 8 - conductor, 9 - terminal wiring assembly, 91 - first terminal wiring assembly, 92 - second terminal wiring assembly, 10 - load, 11 - positive wiring board, 12 - negative wiring board. Specific embodiments
[0026] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0027] It should be noted that the structures, ratios, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have any substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.
[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be noted that the terms "comprising", "including" or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Embodiment
[0029] As Figure 1 And Figure 2 As shown in the figure, this embodiment provides an intelligent miniature circuit breaker, which includes a housing 7, and a moving contact 1, a tail plug 2, a static contact 4, a through-pole wiring row 5 and a negative-pole wiring row 6 respectively arranged in the housing 7.
[0030] The housing 7 is formed to have the same shape as that of a conventional intelligent miniature circuit breaker housing, presenting a flat cuboid structure. Its tail end is connected to the switchgear cabinet, and its head end is connected to the load. It has two mutually parallel wide faces and two mutually parallel narrow faces. The inner side of the wide face of the housing 7 is the mounting base surface for each component. Two sockets are recessed at the tail of the housing 7, namely socket one 71 and socket two 72. Socket one 71 and socket two 72 are both parallel to the wide face of the housing 7, and two tail plugs 2 are arranged side by side in each socket. The two tail plugs 2 have slots with openings facing outside the socket. In the same socket, the slots of the two tail plugs 2 are on the same plane. At the head of the housing 7, there are two terminal wiring assemblies 9, namely terminal wiring assembly one 91 and terminal wiring assembly two 92. Each terminal wiring assembly 9 is obtained by combining two wiring terminals side by side, and the two wiring terminals of each terminal wiring assembly 9 are arranged staggeredly. A wiring board parallel to the wide face of the housing 7 is inserted into each socket. The wiring boards are the positive wiring board 11 and the negative wiring board 12 respectively. The positive wiring board 11 is inserted into socket one 71 and plugged into the slots of the two tail plugs 2 in socket one 71. The negative wiring board 12 is inserted into socket two 72 and plugged into the slots of the two tail plugs 2 in socket two 72.
[0031] The moving contact 1 is a basic component of the circuit breaker and can rotate under the control of the built-in operating mechanism of the circuit breaker to separate from or contact the static contact 4, realizing the on-off of the circuit. The moving direction of the moving contact 1 is parallel to the plane where the slot of the tail plug 2 is located.
[0032] As Figure 3 shown, one end of the static contact 4 is connected to the tail plug 2 in socket one 71 through a conductor 8. The other end of the static contact 4 is arranged corresponding to the moving contact 1 and can be closed or separated from each other. A manganese copper shunt 42 is arranged on the static contact 4, and a U-shaped arc structure 41 is provided at the end of the static contact 4. The U-shaped arc structure 41 has a certain elasticity. When the moving contact 1 presses on the static contact 4, the static contact 4 will give the moving contact 1 a certain direction of elastic force, thereby keeping the static contact 4 and the moving contact 4 tightly pressed to ensure reliable contact. The conductor 8 is a metal plate or a flexible conductor. The two ends of the conductor 8 are respectively welded to the tail plug 2 and the static contact 4. The welding place between the conductor 8 and the tail plug 2 forms a first welding surface 21, and the welding place between the conductor 8 and the static contact 4 forms a second welding surface 81. The first welding surface 21 and the second welding surface 81 are perpendicular to each other.
[0033] As Figure 4 And Figure 5As shown, one end of the through-pole connection bar 5 extends two parallel tongue plates 51 and 52 up and down, which are respectively connected to the two connection terminals of the terminal connection assembly one 91, realizing the parallel connection of two cables in a staggered manner. The other end of the through-pole connection bar 5 extends two tongue plates 53 and 54, which are connected one-to-one with the two tail plugs 2 in the socket two 72. The through-pole connection bar 5 is in a flat plate structure and is arranged on the inner wall of the wide surface of the housing 7 parallel to the wide surface of the housing 7.
[0034] As Figure 6 with Figure 7 As shown, one end of the negative connection bar 6 is connected to the moving contact 1 through a flexible conductor. The other end of the negative connection bar 6 extends two parallel tongue plates 61 and 62 up and down, which are connected one-to-one with the two connection terminals of the terminal connection assembly two 92, realizing the parallel connection of two cables in a staggered manner. The negative connection bar 6 is in an overall flat plate structure and is arranged on the inner wall of the wide surface of the housing 7 parallel to the wide surface of the housing 7. The main body of the through-pole connection bar 5 and the main body of the negative connection bar 6 are in the same plane.
[0035] Similar to a conventional circuit breaker, an arc extinguishing chamber 3 is provided at the position of the housing 7 close to the contact part of the moving contact 1 and the static contact 4. At the same time, an operating mechanism for controlling the separation or closing of the moving contact 1 and the static contact 4 is also installed in the housing 7.
[0036] During use, a 250A DC current enters from the positive connection plate 11 at the tail of the circuit breaker, passes through the tail plug 2 in the socket two 72 of the circuit breaker, the through-pole connection bar 5, the terminal connection assembly one 91 in sequence to the load 10 at the front end of the circuit breaker. Then the DC current returns to the circuit breaker through the load 10, and passes through the terminal connection assembly one 92, the negative connection bar 6, the moving contact 1, the static contact 4, the conductor 8, the tail plug 2 in the socket one 71 in sequence and flows out from the negative connection plate 12 at the tail of the circuit breaker. The width space inside the housing 7 is fully utilized. The placement direction of the internal structure of the products on the market is at a 90° angle to the placement direction of the circuit breaker described in this embodiment.
[0037] Other details not elaborated in this utility model are all conventional technologies well known to those skilled in the art.
[0038] It should be noted that the term "including", "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.
[0039] The protection scope of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.
Claims
1. An intelligent miniature circuit breaker, comprising a housing (7), and a moving contact (1), a tail plug (2), a stationary contact (4), a through-pole terminal block (5), and a negative terminal block (6) respectively arranged in the housing (7); two sockets are formed in a recessed manner at the rear of the housing (7), namely, a first socket (71) and a second socket (72), and a tail plug (2) is arranged in each socket; two terminal connection assemblies (9) are arranged at the head of the housing (7), namely, a first terminal connection assembly (91) and a second terminal connection assembly (92), and each terminal connection assembly (9) comprises two connection terminals; the characteristics are as follows: One end of the stationary contact (4) is connected to the tail plug (2) in the socket (71), and the other end is arranged corresponding to the moving contact (1) and can be closed or separated from each other; One end of the through-pole wiring row (5) is respectively connected to two wiring terminals of the first terminal wiring assembly (91), and the other end is connected to the tail plug (2) in the second socket (72); One end of the negative electrode terminal block (6) is connected to the moving contact (1), and the other end is respectively connected to two terminal blocks of the second terminal connection assembly (92); The through-pole terminal block (5) and the negative-pole terminal block (6) are both in a flat plate-shaped structure as a whole and are arranged on the inner wall of the wide surface of the outer shell (7) in parallel with the wide surface of the outer shell (7).
2. The intelligent miniature circuit breaker according to claim 1, characterized in that: The first socket (71) and the second socket (72) are parallel to the wide surface of the housing (7), and two tail plugs (2) are arranged side by side in each socket. The two tail plugs (2) have slots with openings facing out of the sockets. In the same socket, the slots of the two tail plugs (2) are located on the same plane.
3. The intelligent miniature circuit breaker according to claim 2, characterized in that: A wiring board parallel to the wide surface of the housing (7) is inserted into each socket, and the wiring boards are respectively a positive wiring board (11) and a negative wiring board (12). The positive wiring board (11) is inserted into the first socket (71) and plugged into the slots of the two tail plugs (2) in the first socket (71); the negative wiring board (12) is inserted into the second socket (72) and plugged into the slots of the two tail plugs (2) in the second socket (72).
4. The intelligent miniature circuit breaker according to claim 2, characterized in that: The moving direction of the moving contact (1) is parallel to the plane where the slot of the tail plug (2) is located.
5. The intelligent miniature circuit breaker according to claim 2, characterized in that: The two connection terminals of each terminal connection assembly (9) are arranged in a staggered manner.
6. The intelligent miniature circuit breaker according to claim 5, characterized in that: One end of the through-pole wiring row (5) extends two upper and lower parallel tongue plates (51, 52) to be connected one-to-one with two wiring terminals of the first terminal wiring assembly (91), thereby realizing staggered parallel wiring of two cables; the other end of the through-pole wiring row (5) extends two tongue plates (53, 54) to be connected one-to-one with two tail plugs (2) in the second socket (72).
7. The intelligent miniature circuit breaker according to claim 5, characterized in that: One end of the stationary contact (4) is connected to the tail plug (2) in the first socket (71) via a conductor (8).
8. The intelligent miniature circuit breaker according to claim 7, characterized in that: A manganese copper shunt (42) is provided on the stationary contact (4), and a U-shaped arc structure (41) is provided at the end of the stationary contact (4).
9. The intelligent miniature circuit breaker according to claim 7, characterized in that: The conductor (8) is a metal plate or a soft conductor; two ends of the conductor (8) are respectively welded to the tail plug (2) and the stationary contact (4), wherein the welding point between the conductor (8) and the tail plug (2) forms a first welding surface (21), and the welding point between the conductor (8) and the stationary contact (4) forms a second welding surface (81); the first welding surface (21) and the second welding surface (81) are perpendicular to each other.
10. The intelligent miniature circuit breaker according to claim 5, characterized in that: One end of the negative electrode wiring row (6) is connected to the moving contact (1) via a soft conductor; the other end of the negative electrode wiring row (6) extends two upper and lower parallel tongue plates (61, 62) to be connected one-to-one with two wiring terminals of the second terminal wiring assembly (92), thereby realizing staggered parallel wiring of two cables.