An arc quenching system and switch

Abstract

The utility model relates to low voltage electrical apparatus technical field especially is related to an arc extinguishing system and switch, the utility model provides an arc extinguishing system includes: moving contact subassembly, static contact subassembly, arc chamber subassembly, insulating part and base, moving contact subassembly includes dynamic main contact, dynamic arc contact, moving contact cover and dynamic contact support, is provided with dynamic main silver point on dynamic main contact, is provided with dynamic arc silver point on dynamic arc contact, static contact subassembly includes conducting part and sets up static main silver point and static arc silver point on conducting part, dynamic main silver point and static main silver point all are located between insulating part and moving contact cover, dynamic arc silver point and static arc silver point all are located on the side of insulating part away from moving contact cover, the main circuit (main silver point) is separated with arc combustion area (arc silver point) on the both sides of insulating part, has reduced the risk that dynamic main contact is broken down by arc in the breaking process.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to an arc extinguishing system and switch. Background Technology

[0002] The arc-extinguishing system is one of the key structures of an electrical switch. Typically, an arc-extinguishing system includes main contacts, stationary contacts, and an arc-extinguishing chamber. When the main contacts and stationary contacts separate, an electric arc is generated. This arc is extinguished by arc-extinguishing grids installed within the arc-extinguishing chamber. In existing products, the arc generates high temperatures after the moving and stationary contacts separate, causing internal gases carrying charged particles to disperse within the arc-extinguishing chamber, and even transfer to the main contacts. In severe cases, this can lead to the breakdown of the main contacts. Utility Model Content

[0003] The purpose of this invention is to provide an arc-extinguishing system and switch to solve the technical problem that when the moving and stationary contacts of existing products are separated, the electric arc generates high temperatures, causing the internal gas to carry some charged particles and disperse in the arc-extinguishing chamber, which may even transfer to the main contacts, and in severe cases, lead to the main contacts being broken down.

[0004] In a first aspect, this utility model provides an arc extinguishing system, comprising: a moving contact assembly, a stationary contact assembly, an arc extinguishing chamber assembly, an insulating component, and a base; The moving contact assembly is rotatably mounted on the base, and the stationary contact assembly, the arc-extinguishing chamber assembly, and the insulating member are all fixedly mounted on the base, with the insulating member located between the moving contact assembly and the arc-extinguishing chamber assembly. The moving contact assembly includes at least one moving main contact, at least one moving arc contact, a moving contact cover, and a moving contact support. The moving main contact, the moving arc contact, and the moving contact cover are all fixed on the moving contact support. The moving main contact and the moving arc contact are arranged side by side in the horizontal direction. The moving main contact is provided with a moving main silver dot, and the moving arc contact is provided with a moving arc silver dot. The stationary contact assembly includes a conductive element and a stationary main silver point and a stationary arc silver point disposed on the conductive element; The insulating component has an opening, and the moving arc contact passes through the opening and extends from the insulating component toward the arc-extinguishing chamber assembly. The moving main silver point and the stationary main silver point are both located between the insulating component and the moving contact cover. The moving arc silver point and the stationary arc silver point are both located on the side of the insulating component away from the moving contact cover. The moving contact assembly can be rotated to make the moving main silver point contact or separate from the stationary main silver point, and the moving arc silver point contact or separate from the stationary arc silver point.

[0005] In an optional embodiment, the front end of the insulating member is provided with a first protrusion; The stationary contact assembly further includes a stationary contact cover, which is fixed to the conductive element and at least partially covers the conductive element. The first protrusion is inserted between the stationary main silver point and the stationary contact cover, and is used to block the arc jump path between the arc silver point and the main silver point.

[0006] In an optional embodiment, the insulating member has protruding structures on its left and right sides, and the protruding structures are located near the front end of the insulating member. The base is provided with a first slot that corresponds to and mates with the protruding structures. The raised structure is used to block the arc jump path between the left and right ends of the insulating component and the base.

[0007] In an optional embodiment, the protrusion structure includes a second protrusion located at the side end of the insulating member, and the second protrusion is inserted into the first slot; and / or; The protruding structure includes a third protrusion located on the side of the insulating member facing the moving contact cover. The third protrusion is L-shaped and includes a first segment and a second segment. The first segment is connected to the insulating member, and the second segment is located on the outside of the insulating member and inserted into the outside of the groove wall of the first slot.

[0008] In an optional embodiment, the moving contact supports a second slot provided between the moving main contact and the moving arc contact on the side facing the stationary contact assembly, and the insulating member is provided with a partition corresponding to the second slot on the side facing the moving contact cover, and the partition is used to separate the movement paths of the moving main contact and the moving arc contact. The partition is inserted into the second slot, and the moving contact assembly can move the partition in the depth direction of the second slot by rotation.

[0009] In an optional embodiment, the moving contact cover has a fourth protrusion on the side facing the insulating member. The fourth protrusion is located in the second slot and is used to separate the moving main contact from the moving arc contact. In the lateral parallel direction of the moving main contact and the moving arc contact, the partition is offset from the fourth protrusion.

[0010] In an optional embodiment, the protrusion height of the fourth protrusion is higher than that of the moving main contact.

[0011] In an optional embodiment, the moving contact support is provided with a limiting rib, which is used to restrict the lateral movement of the moving arc contact.

[0012] In an optional embodiment, the insulating member has an arc surface on the side facing the moving contact assembly that is parallel to the movement path of the moving main contact.

[0013] Secondly, this utility model provides a switch, including the arc extinguishing system described in any one of the foregoing embodiments.

[0014] Compared with the prior art, the technical advantages of the arc extinguishing system and switch provided by this utility model are as follows: The arc-extinguishing system provided by this utility model includes: a moving contact assembly, a stationary contact assembly, an arc-extinguishing chamber assembly, an insulating component, and a base; the moving contact assembly is rotatably mounted on the base, while the stationary contact assembly, the arc-extinguishing chamber assembly, and the insulating component are all fixedly mounted on the base, with the insulating component located between the moving contact assembly and the arc-extinguishing chamber assembly; the moving contact assembly includes at least one moving main contact, at least one moving arc contact, a moving contact cover, and a moving contact support, with the moving main contact, the moving arc contact, and the moving contact cover all fixed on the moving contact support, and the moving main contact and the moving arc contact arranged laterally side by side, with the moving main contact... The moving main silver point is provided, and the moving arc contact is provided with a moving arc silver point; the stationary contact assembly includes a conductive element and a stationary main silver point and a stationary arc silver point provided on the conductive element; the insulating element is provided with an opening, the moving arc contact passes through the opening and extends from the insulating element toward the arc-extinguishing chamber assembly, the moving main silver point and the stationary main silver point are both located between the insulating element and the moving contact cover, the moving arc silver point and the stationary arc silver point are both located on the side of the insulating element away from the moving contact cover, and the moving contact assembly can make the moving main silver point contact or separate from the stationary main silver point, and the moving arc silver point contact or separate from the stationary arc silver point by rotation.

[0015] When the moving main silver point and the stationary main silver point separate, the generated arc is guided by the moving arc contact to the arc-extinguishing chamber assembly. The arc is cut by the grid of the arc-extinguishing chamber assembly. Since both the moving and stationary main silver points are located between the insulating component and the moving contact cover, and both the moving and stationary arc silver points are located on the side of the insulating component away from the moving contact cover, the path of charged particles of the arc directly to the main contact is fundamentally blocked. The main circuit (main silver point) and the arc burning area (arc silver point) are separated on both sides of the insulating component, which greatly reduces the risk of the main contact being re-broken by the arc during the breaking process, thereby significantly improving the arc extinguishing capability and breaking reliability of the product.

[0016] The switch provided by this utility model includes the above-mentioned arc extinguishing system. Therefore, the technical advantages and effects achieved by it include those achieved by the above-mentioned arc extinguishing system, which will not be described in detail here.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A side sectional view of the arc extinguishing system provided in an embodiment of this utility model; Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle; Figure 3 A schematic diagram of one side of the insulating component provided in an embodiment of this utility model; Figure 4 A schematic diagram showing the insulating component installed on the base according to an embodiment of this utility model; Figure 5 Provided for the embodiments of this utility model Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the other side of the insulating component provided in an embodiment of the present invention; Figure 7 A schematic diagram showing the cooperation between the partition and the fourth protrusion in an embodiment of this utility model; Figure 8 A schematic diagram of the moving contact cover structure provided in an embodiment of this utility model; Figure 9 A schematic diagram of the back side of the moving contact support provided in an embodiment of this utility model; Figure 10 A schematic diagram of the front side of the moving contact support provided in an embodiment of this utility model; Figure 11 A schematic diagram of the cooperation between the limiting rib and the moving arc contact provided in an embodiment of this utility model; Figure 12 A schematic diagram illustrating the interaction between the moving and stationary contact assemblies and the insulating components provided in this embodiment of the utility model; Figure 13 A schematic diagram of the static contact head cover structure provided in an embodiment of this utility model; Figure 14 This is a schematic diagram of the moving contact assembly structure provided in an embodiment of the present utility model; Figure 15 This is a schematic diagram of the arc-extinguishing system provided in this embodiment of the invention when it is not installed on the base; Figure 16 A schematic diagram of a breakdown path one provided in an embodiment of this utility model; Figure 17A schematic diagram of the second breakdown path provided in an embodiment of this utility model; Figure 18 This is a schematic diagram of the third breakdown path provided in an embodiment of the present invention.

[0020] Icons: 1-Moving contact assembly; 2-Stationary contact assembly; 3-Arc-extinguishing chamber assembly; 4-Insulator; 5-Base; 6-Moving main contact; 7-Moving arc contact; 8-Moving contact cover; 9-Moving contact support; 10-Moving main silver point; 11-Moving arc silver point; 12-Stationary main silver point; 13-Stationary arc silver point; 14-Opening; 15-First protrusion; 16-Stationary contact cover; 17-First slot; 18-Second protrusion; 19-Third... 20 - Protrusion; 21 - First section; 22 - Second slot; 23 - Partition; 24 - Fourth protrusion; 25 - Limiting rib; 26 - Curved surface; 27 - Conductive rod; 28 - Static arc-guiding piece; 29 - Clearance groove; 30 - Main contact piece; 31 - Arc contact piece; 32 - Breakdown path one; 33 - Breakdown path two; 34 - Breakdown path three; 35 - Narrow slot; 36 - Gas-generating component; 37 - Panel; 38 - Reinforcing rib. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[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., 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] The specific structure is as follows: Figures 1 to 18 As shown.

[0027] This embodiment provides an arc extinguishing system, including: a moving contact assembly 1, a stationary contact assembly 2, an arc extinguishing chamber assembly 3, an insulating component 4, and a base 5; the moving contact assembly 1 rotates relative to the base 5, and the stationary contact assembly 2, the arc extinguishing chamber assembly 3, and the insulating component 4 are all fixedly disposed on the base 5, with the insulating component 4 located between the moving contact assembly 1 and the arc extinguishing chamber assembly 3; the moving contact assembly 1 includes at least one moving main contact 6, at least one moving arc contact 7, a moving contact cover 8, and a moving contact support 9, the moving main contact 6, the moving arc contact 7, and the moving contact cover 8 are all fixed on the moving contact support 9, and the moving main contact 6 and the moving arc contact 7 are arranged laterally side by side, with a moving main contact 6 provided with a moving main contact silver... Point 10, the moving arc contact 7 is provided with a moving arc silver point 11; the stationary contact assembly 2 includes a conductive element and a stationary main silver point 12 and a stationary arc silver point 13 provided on the conductive element; the insulating element 4 is provided with an opening 14, the moving arc contact 7 passes through the opening 14 and extends from the insulating element 4 toward the arc-extinguishing chamber assembly 3, the moving main silver point 10 and the stationary main silver point 12 are both located between the insulating element 4 and the moving contact cover 8, the moving arc silver point 11 and the stationary arc silver point 13 are both located on the side of the insulating element 4 away from the moving contact cover 8, and the moving contact assembly 1 can make the moving main silver point 10 contact or separate from the stationary main silver point 12, and the moving arc silver point 11 contact or separate from the stationary arc silver point 13 by rotation.

[0028] In this embodiment, the arc-extinguishing chamber assembly 3 includes two spaced-apart left and right gas-generating elements 36 and a grid plate assembly. At least a portion of the grid plates in the grid plate assembly forms a U-shaped structure with the grid plate belly and two grid plate legs. The two grid plate legs are respectively inserted into the two gas-generating elements 36. Thus, the two gas-generating elements 36 and the grid plate assembly enclose an arc-extinguishing cavity. The two gas-generating elements 36 respectively form the two side walls of the arc-extinguishing cavity and are located on opposite sides of the moving arc contact 7. That is, a narrow slit 35 is formed between the two side walls of the arc-extinguishing cavity, and the moving arc contact 7 moves in the narrow slit 35. The end face of the arc-extinguishing cavity is the side opposite to the moving main contact 6. Since the moving main silver point 10 and the stationary main silver point 12 are located outside the arc-extinguishing cavity, while the moving arc silver point 11 and the stationary arc silver point 13 are located inside the arc-extinguishing cavity, the arc generated when the circuit breaker is disconnected is generated inside the arc-extinguishing cavity.

[0029] An insulating member 4 is provided between the moving contact assembly 1 and the arc-extinguishing chamber assembly 3. The insulating member 4 includes a panel 37 opposite to the end face of the arc-extinguishing chamber. The end face of the arc-extinguishing chamber and the panel 37 have intersecting ribs, which allow some of the free gas overflowing from the arc-extinguishing chamber to be discharged along the meandering air passage formed between the end face of the arc-extinguishing chamber and the panel 37. An opening 14 is provided on the panel 37, allowing the moving arc contact 7 to pass through the opening 14 and move into the narrow slit 35. The moving main silver point 10 and the stationary main silver point 12 are isolated on the other side of the insulating member 4 (i.e., between it and the moving contact cover 8). The main contact and the arc contact are separated and engaged by the rotation of the moving contact assembly 1. The moving main silver point 10 and the stationary main silver point 12 separate first, and the moving arc silver point 11 and the stationary arc silver point 13 separate later. The generated arc is guided by the moving arc contact 7 to the arc-extinguishing chamber assembly 3. The generated arc is cut by the grid of the arc-extinguishing chamber assembly 3. Since the moving main silver point 10 and the stationary main silver point 12 are both located between the insulating part 4 and the moving contact cover 8, and the moving arc silver point 11 and the stationary arc silver point 13 are both located on the side of the insulating part 4 away from the moving contact cover 8, the path of the charged particles of the arc directly to the main contact is fundamentally blocked. The main circuit (main silver point) and the arc burning area (arc silver point) are separated on both sides of the insulating part 4, which greatly reduces the risk of the main contact being re-broken by the arc during the breaking process, thereby significantly improving the arc extinguishing capability and breaking reliability of the product.

[0030] In this embodiment, the number of moving main contacts 6 can be one or multiple contacts arranged side by side. When there are multiple moving main contacts 6, they can all be arranged on the same side of the moving arc contact 7, or they can be divided into two groups and arranged on opposite sides of the moving arc contact 7. Multiple moving main contacts 6 can divide the current passing through them into several currents in the same direction, thereby effectively improving the short-time withstand capability. The number of moving arc contacts 7 can be one or multiple contacts arranged side by side.

[0031] In this embodiment, the moving main contact 6 includes a main contact piece 30, on which a moving main silver point 10 is provided; the moving arc contact 7 includes an arc contact piece 31, on which a moving arc silver point 11 is provided.

[0032] In the optional technical solution of this embodiment, the front end of the insulating member 4 is provided with a first protrusion 15; the stationary contact assembly 2 also includes a stationary contact cover 16, which is fixed on the conductive member and covers at least part of the conductive member; the first protrusion 15 is inserted between the stationary main silver point 12 and the stationary contact cover 16 and is used to block the arc jump path between the arc silver point and the main silver point.

[0033] Since an electric arc can jump along the gap between the front end of the insulator 4 and the stationary main silver point 12 to form a breakdown path 32, in this embodiment, a first protrusion 15 is provided at the front end of the insulator 4, and the stationary contact assembly 2 is equipped with a stationary contact cover 16. The first protrusion 15 is inserted into the gap between the stationary main silver point 12 and the stationary contact cover 16. The first protrusion 15 effectively fills the electrical gap that may exist between the front end of the insulator 4 and the base 5, forming an insulating barrier, effectively blocking the electric arc jumping along the gap in the breakdown path 32, preventing the electric arc from bypassing this path to the front of the insulator 4 and breaking down the main contact, thus enhancing the insulation integrity of the system.

[0034] In this embodiment, the conductive component includes a conductive rod 27 and a stationary arc-guiding plate 28. The stationary main silver point 12 is disposed on the conductive rod 27. The stationary contact cover 16 is fixed on the conductive rod 27 and at least partially covers the conductive rod 27. The stationary contact cover 16 is provided with a relief groove 29. The stationary arc-guiding plate 28 is disposed on the stationary contact cover 16. The stationary arc silver point 13 is disposed on the stationary arc-guiding plate 28. The stationary contact assembly 2 has a simple overall structure and good conductivity.

[0035] In the optional technical solution of this embodiment, the left and right sides of the insulating member 4 are provided with protruding structures, and the protruding structures are located near the front end of the insulating member 4. The base 5 is provided with a first slot 17 that corresponds to and cooperates with the protruding structure. The protruding structure is used to block the arc jump path between the left and right ends of the insulating member 4 and the base 5.

[0036] Since an electric arc can jump along the gap between the side of the insulating component 4 and the base 5, forming a second breakdown path 33, in this embodiment, protruding structures are provided on both sides of the insulating component 4 near the front end, and corresponding first slots 17 are formed on the base 5. The protruding structures and the first slots 17 form a plug-in fit. The protruding structures block the path of the electric arc jumping from the side of the insulating component 4 to the gap between the base 5, i.e., the second breakdown path 33. This further seals the assembly interface between the insulating component 4 and the base 5, eliminating the risk of lateral breakdown.

[0037] In the optional technical solution of this embodiment, the protruding structure includes a second protrusion 18, which is located at the side end of the insulating member 4 and is inserted into the first slot 17; and / or; the protruding structure includes a third protrusion 19, which is located on the side of the insulating member 4 facing the moving contact cover 8. The third protrusion 19 is L-shaped and includes a first segment 20 and a second segment 21. The first segment 20 is connected to the insulating member 4, and the second segment 21 is located on the outside of the insulating member 4 and is inserted into the outside of the slot wall of the first slot 17.

[0038] In this embodiment, two specific implementations of the protruding structure are provided. One is a second protrusion 18 that is directly inserted into the first slot 17; the other is an L-shaped third protrusion 19, the second segment 21 of which wraps around the outside of the slot wall of the first slot 17. The second protrusion 18 achieves an internal insertion closure, while the third protrusion 19 achieves an external wrapping closure. Both structures can effectively block the lateral arc path, and can be optimized or combined according to the specific structure of the base 5 and the insulating member 4, providing design and manufacturing flexibility while ensuring reliable insulation.

[0039] In the optional technical solution of this embodiment, a second slot 22 is provided between the moving main contact 6 and the moving arc contact 7 on the side of the moving contact support 9 facing the stationary contact assembly 2. A partition 23 corresponding to the second slot 22 is provided on the side of the insulating member 4 facing the moving contact cover 8, and the partition 23 is used to separate the movement paths of the moving main contact 6 and the moving arc contact 7. The partition 23 is inserted into the second slot 22, and the moving contact assembly 1 can move the partition 23 in the depth direction of the second slot 22 by rotation.

[0040] In this embodiment, a second slot 22 is provided on the moving contact support 9 between the moving main contact 6 and the moving arc contact 7; simultaneously, a corresponding partition 23 is provided on the insulating member 4, with an opening 14 located between the two partitions 23. The partition 23 is inserted into the second slot 22 and can move in the depth direction within the slot when the moving contact rotates. The partition 23 physically separates the movement paths and space of the moving main contact 6 and the moving arc contact 7, isolating the moving main contact 10 and the moving arc contact 7. Throughout the breaking process, the main contact area and the arc contact area are continuously separated, forming a dynamic separation, effectively preventing the arc particles between the two areas from interfering with each other.

[0041] In the optional technical solution of this embodiment, a fourth protrusion 24 is provided on the side of the moving contact cover 8 facing the insulating member 4. The fourth protrusion 24 is located in the second slot 22 and is used to separate the moving main contact 6 and the moving arc contact 7. In the lateral parallel direction of the moving main contact 6 and the moving arc contact 7, the partition 23 and the fourth protrusion 24 are staggered. The fourth protrusion 24 is located on the outer or inner side of the two partitions 23, such as... Figure 7 As shown, in this embodiment, the fourth protrusion 24 is located inside the second slot 22 and outside the two partitions 23.

[0042] Since the electric arc can transfer from the arc point to the main point, forming a breakdown path 34, in this embodiment, a fourth protrusion 24 is provided on the moving contact cover 8. The fourth protrusion 24 is also located in the second slot 22, used to separate the moving main contact 6 and the moving arc contact 7, and is offset from the partition 23 on the insulating member 4 in the direction of movement. During the opening rotation of the moving contact assembly 1, the partition 23 gradually exits the second slot 22, which will result in a lack of isolation between the moving main contact 6 and the moving arc contact 7. At this time, the fourth protrusion 24 makes up for this deficiency, so that the moving main contact 6 and the moving arc contact 7 are always isolated during the entire opening process, which greatly improves the reliability of isolation, ensures that the breakdown path 34 is always blocked, and prevents breakdown.

[0043] In an optional technical solution of this embodiment, the protrusion height of the fourth protrusion 24 is higher than that of the moving main contact 6. Preferably, when the switch is open, the projection of the moving main contact 6 along the lateral parallel direction of the moving main contact 6 and the moving arc contact 7 is at least partially within the projection of the fourth protrusion 24 along the lateral parallel direction of the moving main contact 6 and the moving arc contact 7. Preferably, the projection of the moving main contact 6 along the lateral parallel direction of the moving main contact 6 and the moving arc contact 7 is within the projection of the fourth protrusion 24 along the lateral parallel direction of the moving main contact 6 and the moving arc contact 7.

[0044] In this embodiment, the protrusion height of the fourth protrusion 24 on the moving contact cover 8 is set higher than that of the moving main contact 6, ensuring that the fourth protrusion 24 can provide absolutely reliable shielding, completely shielding the moving main contact 6, preventing any electric arc from bypassing from above or to the side and hitting the moving main contact 6, thus achieving all-round protection for the moving main contact 6.

[0045] In the optional technical solution of this embodiment, the moving contact support 9 is provided with a limiting rib 25, which is used to restrict the lateral movement of the moving arc contact 7.

[0046] In this embodiment, a limiting rib 25 is provided on the moving contact support 9. The limiting rib 25 contacts or cooperates with the moving arc contact 7, restricting the lateral movement or shaking of the moving arc contact 7, ensuring that the moving arc contact 7 is accurately positioned during the opening and closing process, and can always move smoothly within the opening 14 on the insulating component 4, and normally contact and separate from the stationary arc silver point 13, thus improving stability.

[0047] In the optional technical solution of this embodiment, the insulating member 4 is provided with an arc surface 26 parallel to the movement path of the moving main contact 6 on the side facing the moving contact assembly 1.

[0048] In this embodiment, an arc surface 26 parallel to the movement path of the moving main contact 6 is provided on the side of the insulating member 4 facing the moving contact assembly 1. A uniform gap is formed between the arc surface 26 and the moving main contact 6. This uniform gap facilitates the uniform distribution of the electric field, avoids local electric field concentration, thereby reducing the possibility of electric field breakdown near the main contact and further improving the insulation performance of the system under high voltage.

[0049] The moving contact cover 8 includes baffles facing the two partitions 23. The end faces of the two partitions 23 facing the moving contact cover 8 cooperate with the baffle surfaces of the moving contact cover 8 facing the two partitions 23 to block free gas moving towards the moving contact cover 8 between the two partitions 23. The baffle surfaces of the moving contact cover 8 facing the two partitions 23 have two reinforcing ribs 38 located on the outer sides of the two partitions 23. While providing structural reinforcement to the moving contact cover 8, these ribs can also further block free gas and guide the movement of the moving contact cover 8.

[0050] The switch provided in this embodiment includes the arc extinguishing system described above. Therefore, the technical advantages and effects achieved by the switch include those achieved by the arc extinguishing system described above, which will not be repeated here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An arc quenching system, characterized in that, include: Moving contact assembly (1), stationary contact assembly (2), arc-extinguishing chamber assembly (3), insulating component (4) and base (5); The moving contact assembly (1) is rotatably disposed on the base (5), the stationary contact assembly (2), the arc-extinguishing chamber assembly (3) and the insulating member (4) are all fixedly disposed on the base (5), and the insulating member (4) is located between the moving contact assembly (1) and the arc-extinguishing chamber assembly (3); The moving contact assembly (1) includes at least one moving main contact (6), at least one moving arc contact (7), a moving contact cover (8), and a moving contact support (9). The moving main contact (6), the moving arc contact (7), and the moving contact cover (8) are all fixed on the moving contact support (9). The moving main contact (6) and the moving arc contact (7) are arranged side by side in the horizontal direction. The moving main contact (6) is provided with a moving main silver point (10), and the moving arc contact (7) is provided with a moving arc silver point (11). The stationary contact assembly (2) includes a conductive element and a stationary main silver point (12) and a stationary arc silver point (13) disposed on the conductive element. An opening (14) is provided on the insulating member (4), the moving arc contact (7) passes through the opening (14) and extends from the insulating member (4) toward the arc-extinguishing chamber assembly (3), the moving main silver point (10) and the stationary main silver point (12) are both located between the insulating member (4) and the moving contact cover (8), the moving arc silver point (11) and the stationary arc silver point (13) are both located on the side of the insulating member (4) away from the moving contact cover (8), and the moving contact assembly (1) can make the moving main silver point (10) contact or separate from the stationary main silver point (12) and the moving arc silver point (11) contact or separate from the stationary arc silver point (13) by rotation.

2. The quenching system of claim 1, wherein, The front end of the insulating member (4) is provided with a first protrusion (15). The stationary contact assembly (2) further includes a stationary contact cover (16), which is fixed to the conductive element and at least partially covers the conductive element; The first protrusion (15) is inserted between the stationary main silver point (12) and the stationary contact cover (16) and is used to block the arc jump path between the arc silver point and the main silver point.

3. The quenching system of claim 1, wherein, The insulating member (4) has protruding structures on its left and right sides, and the protruding structures are located near the front end of the insulating member (4). The base (5) has a first slot (17) that corresponds to and cooperates with the protruding structures. The raised structure is used to block the arc jump path between the left and right ends of the insulating element (4) and the base (5).

4. The quenching system of claim 3, wherein, The protrusion structure includes a second protrusion (18), which is located at the side end of the insulating member (4) and is inserted into the first slot (17). and / or; The protruding structure includes a third protrusion (19), which is located on the side of the insulating member (4) facing the moving contact cover (8). The third protrusion (19) is L-shaped and includes a first segment (20) and a second segment (21). The first segment (20) is connected to the insulating member (4), and the second segment (21) is located on the outside of the insulating member (4) and inserted into the outside of the groove wall of the first slot (17).

5. The quenching system of claim 1, wherein, The moving contact support (9) has a second slot (22) on the side facing the stationary contact assembly (2) between the moving main contact (6) and the moving arc contact (7). The insulating member (4) has a partition (23) on the side facing the moving contact cover (8) that corresponds to the second slot (22). The partition (23) is used to separate the movement paths of the moving main contact (6) and the moving arc contact (7). The partition (23) is inserted into the second slot (22), and the moving contact assembly (1) can rotate to move the partition (23) in the depth direction of the second slot (22).

6. The quenching system of claim 5, wherein, The moving contact cover (8) is provided with a fourth protrusion (24) on the side facing the insulating member (4). The fourth protrusion (24) is located in the second slot (22) and is used to separate the moving main contact (6) from the moving arc contact (7). In the transverse parallel direction of the moving main contact (6) and the moving arc contact (7), the partition (23) is misaligned with the fourth protrusion (24).

7. The quenching system of claim 6, wherein, The fourth protrusion (24) has a higher protrusion height than the moving main contact (6).

8. The quenching system of any one of claims 1-7, wherein, The moving contact support (9) is provided with a limiting rib (25), which is used to limit the lateral movement of the moving arc contact (7).

9. The quenching system according to any one of claims 1-7, characterized in that, The insulating member (4) has an arc surface (26) on the side facing the moving contact assembly (1) that is parallel to the movement path of the moving main contact (6).

10. A switch, characterized by Includes the arc extinguishing system according to any one of claims 1-9.

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