Universal circuit breaker
By setting a tight structure limit arc extinguishing chamber inside the zero-skipping hood of the universal circuit breaker, the problem of short circuit damage and arc extinguishing chamber failure in the existing technology in the universal circuit breaker is solved, and the power transmission safety and structural simplicity are achieved.
Patent Information
- Application Number
- CN202421294920.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-07
AI Technical Summary
In high humidity environments, existing universal circuit breakers are prone to short-circuiting of electrical components, resulting in excessive breakage current, short-circuit damage to the product, and arcs sprayed into the cabinet, and even causing the entire cabinet to burn. At the same time, the fixed strength of the arc extinguishing system structure is not enough, and the arc extinguishing chamber is easily washed away by the airflow and causing failure when the large current is broken.
A universal circuit breaker is designed, and a compression structure limit arc extinguishing chamber is set on the inside of the zero-skipping arc hood. The compression surface prevents the arc extinguishing chamber from moving away from the moving contacts and static contacts, so as to avoid displacement or failure after being blown by high-temperature and high-pressure airflow.
It effectively prevents displacement or failure of the arc extinguishing chamber after being blown by high-temperature and high-pressure airflow, avoids short-circuit damage and arc diffusion, and has the characteristics of simple structure, low cost and easy to promote.
Smart Images
Figure CN222705425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a universal circuit breaker. Background Art
[0002] As users' demand for the safety of universal circuit breakers increases, the power transmission safety of circuit breakers is increasingly valued, especially in situations such as new energy where the transformer capacity is large, the product phase spacing is small, the cabinet space is limited, and the environment is in a high humidity all year round. During the power-on process, due to the small phase spacing of the product and the high air humidity, the electrical components in the cabinet are prone to phase breakdown and short circuit, resulting in a large breaking current. The product cannot withstand too much short-circuit current, resulting in short-circuit damage to the product, arc spraying into the cabinet, and even causing the entire cabinet to short-circuit and burn.
[0003] In addition, the arc extinguishing system of existing products does not have sufficient structural fixing strength, and the arc extinguishing chamber is easily blown away by airflow when large current is interrupted, causing failure. Summary of the invention
[0004] The purpose of the utility model is to overcome at least one defect of the prior art and provide a universal circuit breaker.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A universal circuit breaker comprises a contact system, an arc extinguishing chamber and a zero arcing cover. The zero arcing cover and the contact system are arranged on both sides of the arc extinguishing chamber opposite to each other. A clamping structure is arranged on the inner side of the zero arcing cover. The clamping structure is provided with a clamping surface for limiting the arc extinguishing chamber. The clamping structure presses the arc extinguishing chamber through the clamping surface to prevent the arc extinguishing chamber from moving in a direction away from a moving contact and a stationary contact.
[0007] Preferably, it further comprises a bracket connected to the arc extinguishing chamber, the bracket is provided with a supporting surface, the pressing surface abuts against the supporting surface, and the pressing structure limits the arc extinguishing chamber through the bracket.
[0008] Preferably, at least two clamping structures are arranged on the inner side of the zero arcing cover corresponding to the number of arc extinguishing chambers, and the clamping surfaces of the at least two clamping structures are respectively used to limit the at least two arc extinguishing chambers.
[0009] Preferably, the compression structure is in the shape of a flat plate, and convection holes are provided on the compression structure.
[0010] Preferably, the compression structure is U-shaped, a U-shaped convection hole is formed on the compression structure, and compression surfaces are respectively arranged on both sides of the opening of the U-shaped convection hole.
[0011] Preferably, the clamping structure comprises a plurality of compression rods arranged at intervals, the ends of the compression rods away from the arc extinguishing chambers are respectively connected to the zero arcing covers, and the ends of the compression rods close to the arc extinguishing chambers are provided with compression surfaces for clamping the arc extinguishing chambers.
[0012] Preferably, the clamping structure is provided with connecting holes for connecting the connecting piece, the connecting holes and the clamping surface are arranged at two ends of the clamping structure opposite to each other, and the clamping structure is connected to the zero flashover cover through the connecting piece.
[0013] Preferably, the clamping structure is integrally formed with the zero arcing cover.
[0014] Preferably, it comprises a plurality of clamping structures, which are integrally formed and connected to the zero arcing cover through a connecting piece.
[0015] Preferably, the zero arcing cover includes two first side plates arranged opposite to each other and two second side plates arranged opposite to each other, the two first side plates are respectively connected between the two second side plates, the two first side plates and the two second side plates are connected by a top plate, and the clamping structure is arranged between the two second side plates.
[0016] Preferably, it further comprises a base, the base comprises two base side panels arranged opposite to each other, and the two second side panels are respectively connected to the base side panels.
[0017] Preferably, the bracket includes two first supporting parts arranged opposite to each other, and a second supporting part connected between the two first supporting parts, the second supporting part is provided with a supporting surface, the second supporting part and the two first supporting parts form a U-shaped structure which is inverted on the fixed plate, and the two first supporting parts are respectively inserted into two mounting grooves of the fixed plate, and the two first supporting parts are respectively connected to the fixed plate.
[0018] Preferably, the arc extinguishing chamber includes two clamping plates arranged opposite to each other, and a plurality of grid plates arranged between the two clamping plates, a fixing plate is provided at one end of the plurality of grid plates close to the zero arcing cover, the fixing plate is connected between the two clamping plates, at least one arc isolation plate is provided between the fixing plate and the plurality of grid plates, a plurality of through holes are provided on the arc isolation plate, and the fixing plate is provided on the side close to the zero arcing cover with two mounting grooves respectively recessed in a direction away from the zero arcing cover, and the two mounting grooves are relatively arranged at both ends of the fixing plate.
[0019] Preferably, the fixing plate is provided with a first elongated air hole, the second supporting portion is provided with a second elongated air hole, and the first air hole and the second air hole are vertically arranged.
[0020] Preferably, the length direction of the bracket is arranged parallel to the arrangement direction of the grid plates in the arc extinguishing chamber.
[0021] Preferably, the stent is a metal stent.
[0022] Preferably, it includes a drawer seat and a body slidably arranged on the drawer seat, the body includes a base, and a contact system, an arc extinguishing chamber, an electric device, an operating mechanism and an intelligent controller respectively arranged on the base, a partition is provided in the middle of the base, the contact system and the arc extinguishing chamber are arranged on one side of the partition, the contact system includes a moving contact and a static contact, and a conductive bar connected to the moving contact and the static contact respectively, the moving contact is arranged on a contact support, and the moving contact and the static contact are respectively connected to the line through the conductive bar; the operating mechanism, the electric device and the intelligent controller are arranged on a side of the partition away from the contact system, and the intelligent controller and the electric device are relatively arranged on both sides of the operating mechanism, the operating mechanism is connected to the contact system, and the electric device is connected to the operating mechanism.
[0023] The universal circuit breaker of the present embodiment sets a clamping structure to limit the arc extinguishing chamber on the inner side of the zero arcing cover. Since the moving contact and the static contact are accompanied by high-temperature and high-pressure gas when an arc is generated again, the arc extinguishing chamber can be effectively limited by the clamping surface, which can not only prevent the arc extinguishing chamber from being displaced or failing after being blown by the high-temperature and high-pressure airflow, but also avoid changing the existing zero arcing cover structure. It has the characteristics of simple structure, low cost and easy promotion.
[0024] In addition, the clamping structure limits the arc extinguishing chamber through the bracket, which can avoid direct contact between the clamping structure and the arc extinguishing chamber, reduce wear, and make the cooperation between the two more reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the universal circuit breaker of the utility model;
[0026] Figure 2 It is a cross-sectional view of the universal circuit breaker of the utility model;
[0027] Figure 3 This is a schematic diagram of the cooperation between the zero arcing cover and the pressing structure of the utility model;
[0028] Figure 4 It is a schematic diagram of the coordination of the pressing structure, the bracket and the arc extinguishing chamber of the utility model;
[0029] In the figure, contact system 1; arc extinguishing chamber 2; electric device 3; operating mechanism 4; intelligent controller 5; partition 6; zero arcing cover 7; clamping structure 8; clamping surface 81; connecting hole 82; first side plate 71; second side plate 72; top plate 73; convection hole 83; bracket 9; supporting surface 90; clamping plate 21; grid 22; fixing plate 23; mounting groove 24; first supporting portion 91; second supporting portion 92; first air vent 25; second air vent 93. DETAILED DESCRIPTION
[0030] The specific implementation of the universal circuit breaker of the present utility model is further described below in conjunction with the embodiments given in the accompanying drawings. The universal circuit breaker of the present utility model is not limited to the description of the following embodiments.
[0031] like Figure 1 As shown, the universal circuit breaker of the utility model includes a drawer seat (not shown in the figure) and a body slidably arranged on the drawer seat, the body includes a base, and a contact system 1, an arc extinguishing chamber 2, an electric device 3, an operating mechanism 4 and an intelligent controller 5 respectively arranged on the base, a partition 6 is provided in the middle of the base, the contact system 1 and the arc extinguishing chamber 2 are arranged on one side of the partition 6, the contact system 1 includes a moving contact and a stationary contact, and a conductive bar connected to the moving contact and the stationary contact respectively, the moving contact is arranged on a contact support, and the moving contact and the stationary contact are respectively connected to the line through the conductive bar;
[0032] The operating mechanism 4, the electric device 3 and the intelligent controller 5 are arranged on the side of the partition 6 away from the contact system 1, and the intelligent controller 5 and the electric device 3 are relatively arranged on both sides of the operating mechanism 4. The intelligent controller 5 is used for monitoring, remote control and / or communication of the circuit breaker. The operating mechanism 4 is connected to the contact support and can manually drive the operating mechanism 4 to store energy. The electric device 3 is connected to the operating mechanism 4 and is used to automatically drive the operating mechanism 4 to store energy. The operating mechanism 4 is triggered to release energy by manually pressing the closing button, or the intelligent controller 5 drives the operating mechanism 4 to release energy through an electromagnetic driver or other similar mechanism. The operating mechanism 4 drives the contact support to drive the moving contact to contact and separate with the static contact, thereby conducting and disconnecting the connected line. The arc extinguishing chamber 2 is used to extinguish the arc generated between the moving contact and the static contact.
[0033] like Figure 1 As shown, the universal circuit breaker also includes a zero arcing cover 7, which is arranged on both sides of the arc extinguishing chamber 2 relative to the contact system 1. The zero arcing cover 7 is used to block the arc escaping from the arc extinguishing chamber 2, prevent the arc from spreading from the arc extinguishing chamber 2 to other positions, and avoid short circuit or other faults caused by the arc spreading.
[0034] like Figure 2 As shown, an improvement of the present embodiment is that a clamping structure 8 is provided on the inner side of the zero arcing cover 7, and the clamping structure 8 is provided with a clamping surface 81 for limiting the arc extinguishing chamber 2. The clamping structure 8 presses the arc extinguishing chamber 2 through the clamping surface 81 to prevent the arc extinguishing chamber 2 from moving in a direction away from the moving contact and the static contact.
[0035] The universal circuit breaker of the present embodiment sets a clamping structure 8 on the inner side of the zero arcing cover 7 to limit the arc extinguishing chamber 2. Since the moving contact and the static contact are accompanied by high-temperature and high-pressure gas when an arc is generated again, the arc extinguishing chamber 2 can be effectively limited by the clamping surface 81, which can not only prevent the arc extinguishing chamber 2 from being displaced or failing after being blown by the high-temperature and high-pressure airflow, but also avoid changing the existing zero arcing cover 7 structure, and has the characteristics of simple structure, low cost and easy promotion.
[0036] like Figure 3 As shown, the universal circuit breaker of this embodiment is a three-pole structure, including three groups of contact systems 1 and three arc extinguishing chambers 2 respectively arranged corresponding to the three groups of contact systems 1, and three clamping structures 8 are arranged on the inner side of the zero arcing cover 7 corresponding to the three arc extinguishing chambers 2. The clamping surfaces 81 of the three clamping structures 8 are respectively used to limit the three arc extinguishing chambers 2, and the three clamping structures 8 are arranged in parallel.
[0037] Of course, according to the number of arc extinguishing chambers 2, multiple clamping structures 8 can be set inside the zero arcing cover 7. The number of the clamping structures 8 can correspond to the arc extinguishing chambers 2. When there are at least two clamping structures 8, at least two clamping structures 8 are set in parallel.
[0038] like Figure 4 As shown, as a first embodiment of the clamping structure 8, the clamping structure 8 is provided with a connecting hole 82 for connecting connecting parts such as rivets or screws, the connecting hole 82 and the clamping surface 81 are arranged at both ends of the clamping structure 8 opposite to each other, and the clamping structure 8 is connected to the zero arcing cover 7 through the connecting parts. When multiple clamping structures 8 are provided, the multiple clamping structures 8 are respectively connected to the zero arcing cover 7 through the connecting parts.
[0039] As a second embodiment of the clamping structure 8, a plurality of clamping structures 8 are integrally formed and connected to the zero arcing cover 7 through connectors such as rivets or screws. Of course, the clamping structure 8 can also adopt other shapes, which are not specifically limited here.
[0040] As a third embodiment of the clamping structure 8, the clamping structure 8 and the zero arcing cover 7 are integrally formed, which can save the step of assembling the clamping structure 8 and the zero arcing cover 7 and reduce the difficulty of assembly.
[0041] like Figure 3As shown, the zero arcing cover 7 includes two first side plates 71 and two second side plates 72 arranged opposite to each other, the two first side plates 71 are respectively connected between the two second side plates 72, the two first side plates 71 and the two second side plates 72 are connected by a top plate 73, and the box-shaped zero arcing cover 7 formed by the top plate 73, the two first side plates 71 and the two second side plates 72 is inverted on the top side of the arc extinguishing chamber 2. In this embodiment, the length of the first side plate 71 is greater than that of the second side plate 72. The base includes two base side plates arranged opposite to each other, and the two second side plates 72 are respectively connected to the base side plates.
[0042] The clamping structure 8 in this embodiment is in the shape of a flat plate, which is disposed between the two second side plates 72 and parallel to the second side plates 72. Circular convection holes 83 are provided on the clamping structure 8, which allow air to circulate and improve the heat dissipation effect.
[0043] It is understandable that the clamping structure 8 may also be in other shapes, for example, the clamping structure 8 is in a U-shape, a U-shaped convection hole 83 is formed on the clamping structure 8, and clamping surfaces 81 are respectively arranged on both sides of the opening of the U-shaped convection hole 83 to press on the arc extinguishing chamber 2.
[0044] In addition, the clamping structure 8 can also be made of multiple parts. For example, the clamping structure 8 includes multiple pressure rods arranged at intervals, and the ends of the pressure rods away from the arc extinguishing chamber 2 are respectively connected to the zero arcing cover 7, and the ends of the pressure rods close to the arc extinguishing chamber 2 are provided with a clamping surface 81 for clamping the arc extinguishing chamber 2, so that air can flow through the gaps between the pressure rods.
[0045] like Figure 4 As shown, another improvement of this embodiment is that the universal circuit breaker further includes a bracket 9 connected to the arc extinguishing chamber 2, the bracket 9 is provided with a support surface 90, the pressing surface 81 abuts against the support surface 90, and the pressing structure 8 limits the arc extinguishing chamber 2 through the bracket 9, which can avoid direct contact between the pressing structure 8 and the arc extinguishing chamber 2, reduce wear, and make the cooperation between the two more reliable. Preferably, the bracket 9 is a metal bracket 9, and the length direction of the bracket 9 is arranged parallel to the arrangement direction of the grid in the arc extinguishing chamber 2, so that the bracket 9 can cross the length direction of the arc extinguishing chamber 2, extend the length of the bracket 9 as much as possible, and then increase the contact area between the bracket 9 and the pressing structure 8.
[0046] Specifically, the arc extinguishing chamber 2 includes two clamping plates 21 arranged opposite to each other, and a plurality of grid plates 22 arranged between the two clamping plates 21. A fixing plate 23 is provided at one end of the plurality of grid plates 22 close to the zero arcing cover 7. The fixing plate 23 is connected between the two clamping plates 21. At least one arc-isolating plate is provided between the fixing plate 23 and the plurality of grid plates 22 for blocking metal particles. The arc-isolating plate is provided with a plurality of small through holes, which may be a metal mesh arc-isolating plate and / or a heat-resistant and high-temperature plastic arc-isolating plate. The fixing plate 23 is provided with two mounting grooves 24 on the side close to the zero arcing cover 7, which are respectively recessed in a direction away from the zero arcing cover 7. The two mounting grooves 24 are relatively arranged at the two ends of the fixing plate 23.
[0047] The bracket 9 includes two first support parts 91 arranged opposite to each other, and a second support part 92 connected between the two first support parts 91, the second support part 92 is provided with a support surface 90, the second support part 92 and the two first support parts 91 form a U-shaped structure which is inverted on the fixing plate 23, and the two first support parts 91 are respectively inserted into the two mounting grooves 24 of the fixing plate 23, and the two first support parts 91 are respectively connected to the fixing plate 23 by connecting parts such as rivets or screws.
[0048] Preferably, the fixing plate 23 is provided with a first elongated air hole 25, and the second supporting portion 92 is provided with a second elongated air hole 93, and the first air hole 25 and the second air hole 93 are vertically arranged.
[0049] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.
[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A universal circuit breaker, comprising a contact system (1), an arc extinguishing chamber (2) and a zero arcing cover (7), wherein the zero arcing cover (7) and the contact system (1) are arranged on both sides of the arc extinguishing chamber (2) opposite to each other, characterized in that: A clamping structure (8) is provided on the inner side of the zero arcing cover (7), and the clamping structure (8) is provided with a clamping surface (81) for limiting the arc extinguishing chamber (2). The clamping structure (8) presses the arc extinguishing chamber (2) via the clamping surface (81) to prevent the arc extinguishing chamber (2) from moving in a direction away from the moving contact and the stationary contact.
2. The universal circuit breaker according to claim 1, characterized in that: It also comprises a bracket (9) connected to the arc extinguishing chamber (2), the bracket (9) being provided with a supporting surface (90), the pressing surface (81) abutting against the supporting surface (90), and the pressing structure (8) limiting the arc extinguishing chamber (2) through the bracket (9).
3. The universal circuit breaker according to claim 1, characterized in that: At least two of the clamping structures (8) are arranged on the inner side of the zero arcing cover (7) in accordance with the number of arc extinguishing chambers (2), and the clamping surfaces (81) of the at least two clamping structures (8) are respectively used to limit the positions of at least two arc extinguishing chambers (2).
4. The universal circuit breaker according to claim 1, characterized in that: The pressing structure (8) is in the shape of a flat plate and is provided with convection holes (83).
5. The universal circuit breaker according to claim 1, characterized in that: The pressing structure (8) is in a U-shape, a U-shaped convection hole (83) is formed on the pressing structure (8), and pressing surfaces (81) are respectively arranged on both sides of the opening of the U-shaped convection hole (83).
6. The universal circuit breaker according to claim 1, characterized in that: The clamping structure (8) comprises a plurality of compression rods arranged at intervals, wherein the ends of the compression rods away from the arc extinguishing chamber (2) are respectively connected to the zero arcing cover (7), and the ends of the compression rods close to the arc extinguishing chamber (2) are provided with a clamping surface (81) for clamping the arc extinguishing chamber (2).
7. The universal circuit breaker according to claim 1, characterized in that: The clamping structure (8) is provided with a connecting hole (82) for connecting a connecting piece, the connecting hole (82) and the clamping surface (81) are arranged at two ends of the clamping structure (8) opposite to each other, and the clamping structure (8) is connected to the zero arcing cover (7) via the connecting piece.
8. The universal circuit breaker according to claim 1, characterized in that: The pressing structure (8) and the zero arcing cover (7) are integrally formed.
9. The universal circuit breaker according to claim 1, characterized in that: It comprises a plurality of clamping structures (8), which are integrally formed and connected to the zero arcing cover (7) via a connecting piece.
10. The universal circuit breaker according to claim 1, characterized in that: The zero arcing cover (7) comprises two first side plates (71) arranged opposite to each other and two second side plates (72) arranged opposite to each other, the two first side plates (71) are respectively connected between the two second side plates (72), the two first side plates (71) and the two second side plates (72) are connected via a top plate (73), and the clamping structure (8) is arranged between the two second side plates (72).
11. The universal circuit breaker according to claim 10, characterized in that: It also includes a base, which includes two base side panels that are arranged opposite to each other, and the two second side panels (72) are respectively connected to the base side panels.
12. The universal circuit breaker according to claim 2, characterized in that: The bracket (9) comprises two first supporting parts (91) arranged opposite to each other, and a second supporting part (92) connected between the two first supporting parts (91); the second supporting part (92) is provided with a supporting surface (90); the second supporting part (92) and the two first supporting parts (91) form a U-shaped structure which is inverted on the fixing plate (23); the two first supporting parts (91) are respectively inserted into two mounting grooves (24) of the fixing plate (23); and the two first supporting parts (91) are respectively connected to the fixing plate (23).
13. The universal circuit breaker according to claim 12, characterized in that: The arc extinguishing chamber (2) comprises two clamping plates (21) arranged opposite to each other, and a plurality of grid plates (22) arranged between the two clamping plates (21); a fixing plate (23) is arranged at one end of the plurality of grid plates (22) close to the zero arcing cover (7); the fixing plate (23) is connected between the two clamping plates (21); at least one arc isolation plate is arranged between the fixing plate (23) and the plurality of grid plates (22); a plurality of through holes are arranged on the arc isolation plate; and the fixing plate (23) is provided with two mounting grooves (24) on a side surface close to the zero arcing cover (7) and respectively recessed in a direction away from the zero arcing cover (7); the two mounting grooves (24) are arranged at two ends of the fixing plate (23) in a relative manner.
14. The universal circuit breaker according to claim 13, characterized in that: The fixing plate (23) is provided with a first long air hole (25), and the second supporting portion (92) is provided with a second long air hole (93), and the first air hole (25) and the second air hole (93) are arranged vertically.
15. The universal circuit breaker according to claim 13, characterized in that: The length direction of the bracket (9) is arranged in parallel with the arrangement direction of the grid plates (22) in the arc extinguishing chamber (2).
16. The universal circuit breaker according to claim 2, characterized in that: The bracket (9) is a metal bracket (9).
17. The universal circuit breaker according to any one of claims 1 to 16, characterized in that: The invention comprises a drawer seat and a body slidably arranged on the drawer seat, the body comprising a base, and a contact system (1), an arc extinguishing chamber (2), an electric device (3), an operating mechanism (4) and an intelligent controller (5) respectively arranged on the base, a partition (6) is provided in the middle of the base, the contact system (1) and the arc extinguishing chamber (2) are arranged on one side of the partition (6), the contact system (1) comprises a moving contact and a stationary contact, and a conductive bar respectively connected to the moving contact and the stationary contact, the moving contact is arranged on a contact support, and the moving contact and the stationary contact are respectively connected to the line through the conductive bar; the operating mechanism (4), the electric device (3) and the intelligent controller (5) are arranged on one side of the partition (6) away from the contact system (1), and the intelligent controller (5) and the electric device (3) are relatively arranged on two sides of the operating mechanism (4), the operating mechanism (4) is connected to the contact system (1), and the electric device (3) is connected to the operating mechanism (4).