Breaker contact baffle protection structure

Abstract

The utility model provides a breaker contact baffle protection structure, comprising a first cavity, a second cavity and a baffle plate assembly, a moving contact and a static contact of a breaker are arranged in the first cavity, and the baffle plate assembly is used for separating the first cavity and the second cavity; a first connecting part and a second connecting part are arranged at the two ends of one side, facing the second cavity, of the first cavity respectively, a first rotating shaft is arranged on the first connecting part, one end of the partition plate assembly is connected with the first rotating shaft, and the other end of the partition plate assembly is always in contact with the second connecting part in the opening and closing process of the circuit breaker. In the whole process of moving and static contacts from a closing position to an opening position, the upper part and the lower part of the contacts are completely isolated, and the air tightness and the breaking performance are improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical components technology, and in particular to a circuit breaker contact isolation and protection structure. Background Technology

[0002] In photovoltaic and energy storage power generation systems and AC / DC power distribution systems, with the continuous advancement of power grid technology, system capacity is increasing, system voltage is rising, and the requirements for short-circuit fault current breaking capacity are also increasing. In conventional frame circuit breakers and disconnectors currently on the market, during high-current breaking, the air pressure difference between the contacts and the arc-extinguishing chamber cannot be established quickly, and the arc easily retreats to the contacts, causing arc voltage drop and severe contact erosion. This is especially true in DC high-voltage switches, where breaking failure is more likely.

[0003] It is evident that existing circuit breakers suffer from poor stability during high-current segments. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a circuit breaker contact isolation and protection structure, including a first cavity, a second cavity, and a partition assembly. The moving contact and stationary contact of the circuit breaker are disposed in the first cavity, and the partition assembly is used to isolate the first cavity and the second cavity. The first cavity has a first connecting part and a second connecting part at its two ends facing the second cavity, respectively. A first rotating shaft is provided on the first connecting part, and one end of the partition assembly is connected to the first rotating shaft. During the opening and closing process of the circuit breaker, the other end of the partition assembly is always in contact with the second connecting part.

[0005] Optionally, the second connection part is provided with an extension member, and one end of the baffle assembly is always in contact with the extension member during the opening and closing of the circuit breaker.

[0006] Optionally, the partition assembly has a connecting surface, one end of the extension contacts the connecting surface, and slides on the connecting surface.

[0007] Optionally, one end of the partition assembly connected to the first rotating shaft is connected to an elastic element, which can maintain the initial position under the elastic force of the elastic element.

[0008] Optionally, the elastic element can be a torsion spring or a spring.

[0009] Optionally, the partition assembly includes multiple partition units that can be folded together.

[0010] Optionally, the second connecting part is provided with a second rotating shaft, one end of one partition unit is connected to the first rotating shaft, and one end of the other partition unit is connected to the second rotating shaft.

[0011] Optionally, the partition units are connected by an intermediate pivot.

[0012] Optionally, the first connecting part is disposed on the support of the stationary contact, and the second connecting part is disposed on the contact support of the moving contact, moving together with the contact support.

[0013] This invention adds a partition assembly between the moving and stationary contacts, completely isolating the upper and lower parts of the contacts throughout the entire process from the closed position to the open position, thereby improving airtightness. This allows for the rapid establishment of a pressure difference between the contacts and the arc-extinguishing chamber during high-current interruption, enabling the arc to remain stably burning and extinguishing rapidly within the arc-extinguishing chamber, thus improving interruption performance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the circuit breaker contact isolation and protection structure according to an embodiment of the present utility model. Figure 1 ;

[0015] Figure 2 This is a side view of the contact isolation and protection structure of the circuit breaker according to an embodiment of the present utility model, wherein the circuit breaker is in the open state;

[0016] Figure 3 This is a side view of the contact isolation and protection structure of the circuit breaker according to an embodiment of the present utility model, wherein the circuit breaker is in the closed state;

[0017] Figure 4 This is a three-dimensional structural diagram of the partition assembly in the circuit breaker contact isolation protection structure according to an embodiment of the present utility model;

[0018] Figure 5a This is a schematic diagram of the partition unit in the circuit breaker contact isolation protection structure of this utility model embodiment. Figure 1 ;

[0019] Figure 5b This is a schematic diagram of the partition unit in the circuit breaker contact isolation protection structure of this utility model embodiment. Figure 2 ;

[0020] Figure 5c This is a schematic diagram of the partition unit in the circuit breaker contact isolation protection structure of this utility model embodiment. Figure 3 ;

[0021] Figure 5d This is a schematic diagram of the partition unit in the circuit breaker contact isolation protection structure of this utility model embodiment. Figure 4 ;

[0022] Figure 6 This is a three-dimensional structural diagram of the circuit breaker contact isolation and protection structure according to an embodiment of the present utility model. Figure 2 ;

[0023] Figure 7This is a three-dimensional structural diagram of the partition assembly in the circuit breaker contact isolation protection structure according to an embodiment of the present utility model;

[0024] Figure 8a This is a partial three-dimensional structural diagram of the partition assembly in the circuit breaker contact isolation protection structure of this utility model. Figure 1 ;

[0025] Figure 8b This is a partial three-dimensional structural diagram of the partition assembly in the circuit breaker contact isolation protection structure of this utility model. Figure 2 ;

[0026] Figure 8c This is a partial three-dimensional structural diagram of the partition assembly in the circuit breaker contact isolation protection structure of this utility model. Figure 3 ;

[0027] Figure 9a This is a side view of the contact isolation and protection structure of the circuit breaker according to an embodiment of the present utility model, wherein the circuit breaker is in the open state;

[0028] Figure 9b This is a top view of the circuit breaker contact isolation and protection structure according to an embodiment of the present utility model, wherein the circuit breaker is in the open state;

[0029] Figure 10a This is a side view of the contact isolation and protection structure of the circuit breaker according to an embodiment of the present utility model, wherein the circuit breaker is in the closed state;

[0030] Figure 10b This is a top view of the contact isolation and protection structure of the circuit breaker according to an embodiment of the present utility model, wherein the circuit breaker is in the closed state.

[0031] Explanation of reference numerals in the attached figures:

[0032] 101: First cavity; 102: Second cavity;

[0033] 11: First connecting part; 111: First pivot; 112: First boss; 113: Second boss; 12: Second connecting part; 121: Second pivot; 122: Extension; 123: Groove;

[0034] 13: Partition assembly; 130A: Partition unit; 130B: Partition unit; 1301: First connecting rod; 1302: Second connecting rod; 1303: Third connecting rod; 132: Intermediate pivot; 133: Connecting surface; 134: Elastic element; 135: Circular hole;

[0035] 21: Moving contact; 211: Contact support; 212: Clamping plate; 213: Bracket; 214: Rotating shaft; 22: Stationary contact. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0037] Please see Figures 1 to 5d This utility model provides a circuit breaker contact isolation and protection structure, including a first cavity 101, a second cavity 102, and a partition assembly 13. The moving contact 21 and stationary contact 22 of the circuit breaker are disposed in the first cavity 101, and the partition assembly 13 is used to isolate the first cavity 101 and the second cavity 102. The first cavity 101 has a first connecting portion 11 and a second connecting portion 12 at its two ends facing the second cavity 102, respectively. The first connecting portion 11 has a first rotating shaft 111, and one end of the partition assembly 13 is connected to the first rotating shaft 111. During the opening and closing process of the circuit breaker, the other end of the partition assembly 13 is always in contact with the second connecting portion 12. The first connecting portion 11, the second connecting portion 12, and the partition assembly 13 are all made of insulating material or covered with insulating material.

[0038] This invention adds a partition assembly 13 between the moving and stationary contacts, completely isolating the upper and lower parts of the contacts during the entire process from the closed position to the open position of the moving contact 21 and the stationary contact 22, thereby improving airtightness. This allows for the rapid establishment of a pressure difference between the contacts and the arc-extinguishing chamber during high-current interruption, enabling the arc to remain stably burning and extinguishing rapidly within the arc-extinguishing chamber, thus improving interruption performance.

[0039] Furthermore, in one embodiment, the first connecting portion 11 is connected to the stationary contact 22. In an exemplary embodiment, the first connecting portion 11 is disposed on the support of the stationary contact 22, and may be, for example, a corner plate of the stationary contact system. Figure 2 As shown, the second connecting part 12 is connected to the contact support 211 of the moving contact 21 and moves together with the contact support 211. Figure 4 As shown, the partition assembly 13 includes multiple partition units. The number of partition units is not limited. In one embodiment, there are two partition units, such as partition unit 130A and partition unit 130B. In other alternative embodiments, the number of partition units can be three or four, etc. The partition units are foldable and connected. Foldable connection, or foldable structure, means that at least some partition units can be folded together under external force or unfolded under external force.

[0040] For details, please see Figure 4 and combined Figures 5a-5dUnderstandably, the second connecting part 12 is provided with a second rotating shaft 121. One end of a partition unit (e.g., partition unit 130A) is connected to the first rotating shaft 111, and the end of another partition unit (e.g., partition unit 130B) away from partition unit 130A is connected to the second rotating shaft 121. Partition units 130A and 130B are rotatably connected to achieve a foldable connection. In one embodiment, they can be connected together by a flexible structure, such as by a bendable material like silicone or rubber. In another embodiment, such as... Figure 4 As shown, the partition units (e.g., partition unit 130A and partition unit 130B) are connected by an intermediate pivot 132. For details, please refer to [link to relevant documentation]. Figure 5b and Figure 5c Both sides of partition unit 130A and partition unit 130B are provided with round holes or bosses. Partition unit 130A is connected to the first rotating shaft of the first connecting part 11 through the round holes or bosses, and partition unit 130B is connected to the second rotating shaft 121 of the second connecting part 12 through the round holes or bosses. The first connecting part 11 is mounted to the stationary contact 22 by screws, and the second connecting part 12 is mounted to the contact support 211 (e.g., ...) by screws. Figure 2 (As shown).

[0041] Those skilled in the art will understand that different linkage structures can be achieved depending on the number of partition units, such as three-bar linkage, four-bar linkage, five-bar linkage, etc.

[0042] For an example of the working process, please refer to Figure 2 and Figure 3 Understanding is that the first connecting part 11, the second connecting part 12, the partition assembly 13, and a portion of the moving contact system (e.g., a clamping plate) form a three-bar linkage mechanism. The partition unit 130A is rotatably connected to the first connecting part 11 to form the first link 1301; the partition unit 130B is rotatably connected to the second connecting part 12 to form the second link 1302; and the moving contact 21 is rotatably connected to the bracket 213 via the clamping plate 212 to form the third link 1303. During closing, the third link 1303 rotates counterclockwise around a fixed point on the bracket 213, pushing the first link 1301 and the second link 1302 to rotate clockwise. The partition assembly retracts, ensuring reliable contact between the moving contact 21 and the stationary contact 22. When the circuit breaker is tripped, the third link 1303 rotates clockwise around a fixed point on the bracket 213, causing the first link 1301 and the second link 1302 to rotate counterclockwise. The partition assembly 13 opens, and the entire partition assembly 13 separates the arc-extinguishing chamber and the contacts (located in the first cavity 101) from the second cavity 102 below, ensuring the airtightness of the arc-extinguishing system, thereby increasing the arc-blowing gas pressure and improving the reliability of arc extinguishing.

[0043] In one implementation, please refer to Figures 6 to 8cThe second connecting part 12 is provided with an extension member 122. During the opening and closing process of the circuit breaker, one end of the partition assembly 13 is always in contact with the extension member 122, and the two cooperate to achieve better sealing. During the closing process, the angle between at least a portion of the partition assembly 13 and the extension member 122 toward the first cavity 101 gradually decreases until the moving contact 21 and the stationary contact 22 make contact and close the circuit. During the opening process, the moving contact 21 and the stationary contact 22 separate, and the angle between at least a portion of the partition assembly 13 and the extension member 122 toward the first cavity 101 gradually increases. The fact that one end of the partition assembly 13 is always in contact with the extension member 122 can mean that one end of the partition assembly 13 abuts against the surface of the extension member 122, or that one end of the extension member 122 abuts against the partition assembly 13. As long as the two can abut against each other and can move relative to each other to cause the above-mentioned angle change, it does not depart from the scope of this utility model embodiment.

[0044] In one implementation, such as Figure 6 As shown, the partition assembly 13 has a connecting surface 133, one end of the extension member 122 contacts the connecting surface 133 and slides on the connecting surface 133.

[0045] Furthermore, in one embodiment, one end of the partition assembly 13 connected to the first rotating shaft 111 is connected to an elastic element 134, which can maintain the initial position under the elastic force of the elastic element 134. The elastic element 134 can be, for example, a torsion spring, or in other alternative embodiments, a spring, which is not limited in this invention.

[0046] In one example assembly structure, the first connecting part 11, the partition assembly 13, and the elastic member 134 constitute a rotating assembly. The first connecting part 11 is fixed to the stationary contact 22 system by screws, allowing the partition assembly 13 to rotate around the first pivot 111 on the first connecting part 11. The second connecting part 12 is fixed to the contact support 211 of the moving contact 21 system by screws. The first connecting part 11, the second connecting part 12, and the partition assembly 13 are all made of insulating material. The extension member 122 has a rounded front end, rests on top of the partition assembly 13, and remains in contact with it (or can be understood as abutting against the upper surface of the partition assembly 13), completing the assembly of the entire partition assembly 13.

[0047] Specifically, such as Figure 8a As shown, the first connecting part 11 has circular bosses on both sides as first pivots 111, as follows: Figure 8bAs shown, the partition assembly 13 has circular holes 135 on both sides that match the first rotating shaft 111 for rotatable mounting on the first rotating shaft 111. Those skilled in the art will understand that circular holes can also be provided on both sides of the first connecting part 11 as the first rotating shaft 111, and correspondingly, the partition assembly 13 has circular bosses on both sides for rotatable mounting on the first rotating shaft 111. The sidewall of the first connecting part 11 also has a first boss 112 and a second boss 113. The partition assembly 13 has a groove 123 on the side away from the extension member 122. The elastic member 134 is a torsion spring, which is mounted on the first boss 112 of the component. One end of the torsion spring abuts against the second boss 113, and the other end is engaged in the groove 123 of the partition assembly 13. The second connecting part 12 is fixed to the contact support 211 (e.g., ...) through mounting holes. Figure 6 (As shown above).

[0048] For an example of the working process, please refer to Figures 9a to 10b Understanding, such as Figure 9a and Figure 9b As shown, the stationary contact 22 and the moving contact 21 are in the open state. During the closing process, the extension member 122 abuts against the connecting surface 133 of the partition assembly 13. The extension member 122 follows the moving contact 21 system and rotates around the rotating shaft 214 via the clamping plate 212, approaching the stationary contact 22. This pushes the partition assembly 13 to rotate around the first rotating shaft 111 away from the moving contact 21, causing the angle between the partition assembly 13 and the extension member 122 toward the first cavity 101 to gradually decrease until the moving contact 21 contacts the stationary contact 22 and closes the circuit (e.g., ...). Figure 10a and Figure 10b (As shown). During opening, the extension member 122 follows the moving contact 21 system and rotates around the rotating shaft 214 via the clamping plate 212, moving away from the stationary contact 22. Under the action of the elastic member 134, the partition assembly 13 rotates around the first rotating shaft 111, approaching the moving contact 21. This causes the angle between the partition assembly 13 and the extension member 122 toward the first cavity 101 to gradually increase, returning to the previous angle. Figure 9a and Figure 9b The circuit breaker is shown in the open state. Throughout the process, the baffle assembly 13 separates the arc-extinguishing chamber and contacts (located in the first cavity 101) from the second cavity 102, ensuring the airtightness of the arc-extinguishing system, thereby increasing the arc-blowing gas pressure and improving the reliability of arc extinguishing.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0054] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A circuit breaker contact isolation and protection structure, characterized in that, The circuit breaker includes a first cavity (101), a second cavity (102), and a partition assembly (13). The moving contact (21) and stationary contact (22) of the circuit breaker are disposed in the first cavity (101). The partition assembly (13) is used to separate the first cavity (101) and the second cavity (102). The first cavity (101) has a first connecting part (11) and a second connecting part (12) at both ends on the side facing the second cavity (102). The first connecting part (11) is provided with a first rotating shaft (111). One end of the partition assembly (13) is connected to the first rotating shaft (111). During the opening and closing process of the circuit breaker, the other end of the partition assembly (13) is always in contact with the second connecting part (12).

2. The circuit breaker contact isolation and protection structure according to claim 1, characterized in that, The second connecting part (12) is provided with an extension member (122). During the opening and closing of the circuit breaker, one end of the partition assembly (13) is always in contact with the extension member.

3. The circuit breaker contact isolation and protection structure according to claim 2, characterized in that, The partition assembly (13) has a connecting surface (133), one end of the extension member (122) contacts the connecting surface (133) and slides on the connecting surface (133).

4. A circuit breaker contact isolation and protection structure according to any one of claims 1 to 3, characterized in that, The partition assembly (13) is connected to an elastic element (134) at one end of the first rotating shaft (111), which can maintain the initial position under the elastic force of the elastic element.

5. The circuit breaker contact isolation and protection structure according to claim 4, characterized in that, The elastic element (134) is a torsion spring or a spring.

6. The circuit breaker contact isolation and protection structure according to claim 1, characterized in that, The partition assembly (13) includes multiple partition units (130A, 130B), which are foldable and connected to each other.

7. The circuit breaker contact isolation and protection structure according to claim 6, characterized in that, The second connecting part (12) is provided with a second rotating shaft (121), one end of a partition unit (130A) is connected to the first rotating shaft (111), and one end of another partition unit (130B) is connected to the second rotating shaft (121).

8. A circuit breaker contact isolation and protection structure according to claim 6 or 7, characterized in that, The partition units (130A, 130B) are connected by an intermediate pivot (132).

9. The circuit breaker contact isolation and protection structure according to claim 1, characterized in that, The first connecting part (11) is disposed on the bracket of the stationary contact (22), and the second connecting part (12) is disposed on the contact support (211) of the moving contact (21) and moves together with the contact support (211).

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