A movable contact structure, a switching unit, a disconnector and a power supply system

Abstract

The application discloses a moving contact structure, a switching unit, a disconnecting switch and a power supply system, and relates to the technical field of electrical appliances. The moving contact structure comprises a supporting section and connecting sections arranged at opposite ends of the supporting section, the connecting sections are used for being connected with or disconnected from a static contact, the width of one side of the connecting section where the static contact is cut in is smaller than the width of the other side of the connecting section away from the static contact, and an arc striking inclined surface is formed on the side of the connecting section away from the supporting section. The arc can be quickly introduced into an arc extinguishing chamber, and the burning degree of the on-off position of the moving contact is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical technology, and more specifically, to a moving contact structure, a switching unit, a disconnecting switch, and a power supply system. Background Technology

[0002] Rotary disconnect switches are typically composed of several stacked switch units. Each switch unit includes a housing, in which corresponding moving and stationary contacts are installed, as well as a rotating frame for mounting the moving contacts. When the rotating frame rotates, the moving and stationary contacts are in different states of contact and conduction or separation and disconnection, so as to control the connection and disconnection of the connected line.

[0003] An electric arc is generated when the moving contact separates from the stationary contact. The electric arc not only has a great destructive effect on the contact, but also prolongs the time of circuit breaking, posing a hidden danger to the use of the disconnecting switch. Therefore, an arc-extinguishing chamber is often set in each switch unit to quickly extinguish the arc by pulling and cutting the arc.

[0004] To avoid interference with the arc-extinguishing chamber during rotation, existing moving contacts typically have a certain distance between the on / off position of the moving contact and the arc-extinguishing chamber. This prevents the arc generated at the on / off position of the moving contact from entering the arc-extinguishing chamber in time during use, resulting in severe burning at the on / off position of the moving contact, affecting the stability during use and the service life of the moving contact. Summary of the Invention

[0005] The purpose of this application is to provide a moving contact structure and a disconnecting switch that enables the electric arc to quickly enter the arc-extinguishing chamber and reduces the burning degree at the on / off position of the moving contact.

[0006] The embodiments of this application are implemented as follows:

[0007] In one aspect of this application, a moving contact structure is provided, including a support section and connecting sections disposed at opposite ends of the support section. The connecting sections are used to connect to or disconnect from a stationary contact. The width of the connecting section on the side where the stationary contact is inserted is smaller than the width of the connecting section on the side away from the stationary contact being inserted. An arc-inducing slope is formed on the side of the connecting section away from the support section.

[0008] Optionally, the arc-inducing ramp extends continuously outward from the side that intersects with the stationary contact.

[0009] Optionally, the connecting segment includes a first contact piece and a second contact piece disposed opposite to each other, with a receiving space formed between the first contact piece and the second contact piece for inserting the stationary contact, and the arc-inducing inclined surface is located on the first contact piece and the second contact piece respectively.

[0010] Optionally, the support segment is arranged in a straight line, and the angle between the plane where the arc-leading inclined surface is located and the extension direction of the support segment is 100° to 140°.

[0011] Optionally, the lead-out position of the arc-leading inclined surface is provided with an arc-leading rounded corner, and the lead-out position is located at the angle formed by the arc-leading inclined surface and the side of the connecting section that is away from the side that cuts into the stationary contact.

[0012] Optionally, the arc-inducing inclined surface is located on the first contact piece and the second contact piece respectively, and the access position of the arc-inducing inclined surface is provided with an arc-generating rounded corner. The access position is located at the angle formed by the arc-inducing inclined surface and the side of the connecting section that cuts into the stationary contact.

[0013] Optionally, the first contact piece and the second contact piece are arranged in parallel or at a preset angle; the first contact piece and the second contact piece are respectively provided with a flange on the side where they cut into the stationary contact, and the two flanges are folded to opposite sides.

[0014] Optionally, the arc-initiating fillet protrudes beyond the arc-initiating slope.

[0015] Optionally, the first contact piece and the second contact piece are respectively provided with bending portions, so that the first contact piece forms a first connecting plate and a first arc-guiding plate that are connected to each other, and the second contact piece forms a second connecting plate and a second arc-guiding plate that are connected to each other; the first connecting plate is parallel to the second connecting plate, and the first arc-guiding plate is attached to the second arc-guiding plate.

[0016] Optionally, the first contact piece and the second contact piece are respectively provided with a bending portion, so that the first contact piece forms a first connecting plate and a first arc-leading plate that are connected to each other, and the second contact piece forms a second connecting plate and a second arc-leading plate that are connected to each other; the first connecting plate and the second connecting plate are parallel, the first arc-leading plate and the second arc-leading plate are parallel or have a preset angle, and the distance between the first connecting plate and the second connecting plate is greater than the distance between the first arc-leading plate and the second arc-leading plate.

[0017] Optionally, the first contact piece is provided with a bending portion so that the first contact piece forms a first connecting plate and a first arc-guiding plate that are connected to each other, and the second contact piece only includes a second connecting plate corresponding to the first connecting plate; the first connecting plate and the first arc-guiding plate are respectively parallel to the second connecting plate, and the first arc-guiding plate is located between the plane where the first connecting plate is located and the plane where the second connecting plate is located.

[0018] Optionally, the moving contact structure is integrally formed, or the moving contact structure includes a first body and a second body disposed opposite to each other, the first body and the second body being connected to form the support segment and the connecting segment.

[0019] In another aspect of this application, a switching unit is provided, including a housing and a rotating bracket disposed within the housing, wherein a moving contact structure as described in any one of the above embodiments is disposed on the rotating bracket; the housing also includes a stationary contact corresponding to the moving contact structure and an arc-extinguishing component corresponding to the stationary contact.

[0020] In another aspect of this application, a disconnecting switch is provided, comprising a plurality of stacked switch units as described above, and an operating mechanism connected to the switch units, wherein the operating mechanism is provided with an operating handle.

[0021] This application embodiment also provides a power supply system, including: a DC source, a power conversion unit, and an isolating switch as described above. The isolating switch is connected between the DC source and the power conversion unit, and tripping is achieved by operating the isolating switch when the DC source or the power conversion unit fails.

[0022] The beneficial effects of the embodiments of this application include:

[0023] The moving contact structure, switching unit, disconnecting switch, and power supply system provided in this application embodiment, through a support section and connecting sections located at opposite ends of the support section, enable an electrical connection between the moving contact structure and the stationary contact when the connecting section is connected to the stationary contact. When the connecting section is separated from the stationary contact, an electric arc is generated at the connection point between the connecting section and the stationary contact. To facilitate the timely introduction of the generated electric arc into the arc-extinguishing chamber for arc extinguishing, an arc-initiating slope is formed on the side of the connecting section away from the support section, and the arc-initiating slope extends outward from the side that intersects with the stationary contact. This allows the electric arc generated at the point where the connecting section intersects with the stationary contact to be guided outward by the arc-initiating slope, preventing severe burning of the electric arc in a localized area (at the on / off position) while also allowing the electric arc to be transferred to a position closer to the arc-extinguishing chamber, which is beneficial for the electric arc to quickly enter the arc-extinguishing chamber for arc extinguishing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the structural schematic diagrams of the first moving contact structure provided in the embodiments of this application;

[0026] Figure 2 A second schematic diagram of the first type of moving contact structure provided in the embodiments of this application;

[0027] Figure 3 This is one of the structural schematic diagrams of the second moving contact structure provided in the embodiments of this application;

[0028] Figure 4 This is a second schematic diagram of the structure of the second type of moving contact provided in the embodiments of this application;

[0029] Figure 5 This is the third schematic diagram of the second type of moving contact structure provided in the embodiments of this application;

[0030] Figure 6 This is one of the structural schematic diagrams of the third moving contact structure provided in the embodiments of this application;

[0031] Figure 7 This is the second schematic diagram of the third type of moving contact structure provided in the embodiments of this application;

[0032] Figure 8 This is the third schematic diagram of the third type of moving contact structure provided in the embodiments of this application;

[0033] Figure 9 This is one of the structural schematic diagrams of the fourth moving contact structure provided in the embodiments of this application;

[0034] Figure 10 This is the second schematic diagram of the fourth moving contact structure provided in the embodiments of this application;

[0035] Figure 11 This is a schematic diagram of the structure of the switching unit provided in the embodiments of this application;

[0036] Figure 12 This is a schematic diagram of the structure of the disconnecting switch provided in an embodiment of this application.

[0037] Icons: 100 - Moving contact structure; 110 - Support section; 120 - Connecting section; 121 - Bending section; 122 - Arc-inducing slope; 124 - First contact piece; 1242 - First connecting plate; 1244 - First arc-inducing plate; 126 - Second contact piece; 1262 - Second connecting plate; 1264 - Second arc-inducing plate; 127 - Flanged edge; 128 - Arc-generating rounded corner; 129 - Arc-inducing rounded corner; 200 - Switching unit; 210 - Housing; 220 - Rotating bracket; 230 - Stationary contact; 240 - Arc-extinguishing chamber; 300 - Disconnecting switch; 310 - Operating mechanism; 320 - Operating handle. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 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 application based on the specific circumstances.

[0042] An electric arc is generated when the moving contact separates from the stationary contact. This arc not only causes significant damage to the contact but also prolongs the circuit breaking time, posing a potential hazard to the use of the disconnecting switch. Therefore, arc-extinguishing chambers are often installed in each switching unit to quickly extinguish the arc by drawing and cutting it. To avoid interference with the arc-extinguishing chamber during rotation, existing moving contacts typically maintain a certain distance between the on / off position of the moving contact and the arc-extinguishing chamber. This prevents the arc generated at the on / off position of the moving contact from entering the arc-extinguishing chamber in time, resulting in severe burning at the on / off position of the moving contact, affecting its stability and lifespan. To address these problems, this application provides the following technical solution to overcome them.

[0043] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 9As shown, this embodiment provides a moving contact structure 100, including a support section 110 and connecting sections 120 disposed at opposite ends of the support section 110. The connecting sections 120 are used to connect or disconnect with the stationary contact. The width of the side of the connecting section 120 where the stationary contact is cut in is smaller than the width of the side of the connecting section 120 away from the stationary contact being cut in. An arc-inducing inclined surface 122 is formed on the side of the connecting section 120 away from the support section 110.

[0044] Specifically, the support section 110 is used to connect with the rotating bracket of the disconnector switch. When the rotating bracket rotates, it drives the support section 110 to rotate synchronously. At this time, the connecting sections 120 located at opposite ends of the support section 110 rotate with the support section 110. The support section 110 can only rotate within a specific angle, such as a 90° turn. During the rotation of the connecting section 120, it can connect with the stationary contact to form a connection path, or it can disconnect from the stationary contact to form an open circuit. When the connecting section 120 separates from the stationary contact, an electric arc will be generated at the separation point. When using an arc-extinguishing chamber for arc extinguishing, the generated arc needs to be guided into the arc-extinguishing chamber.

[0045] The connecting section 120 has an arc-initiating slope 122 formed on its side facing away from the support section 110. Specifically, the arc-initiating slope 122 is formed on the outer side of the connecting section 120 facing the arc-extinguishing chamber. Since the width of the side of the connecting section 120 where the stationary contact engages is smaller than the width of the side facing away from the stationary contact, the narrower area of ​​the connecting section 120 can mate with the stationary contact, while the wider area extends into the arc-extinguishing chamber for easier engagement. Furthermore, the engagement point between the connecting section 120 and the stationary contact is also the final separation point. The arc generated at this point can move outward along the arc-initiating slope 122, bringing the generated arc closer to the arc-extinguishing chamber after its movement.

[0046] The moving contact structure 100 provided in this embodiment of the application, through a support section 110 and connecting sections 120 disposed at opposite ends of the support section 110, allows for an electrical connection between the moving contact structure 100 and the stationary contact when the connecting section 120 is connected to the stationary contact. When the connecting section 120 is separated from the stationary contact, an electric arc is generated at the connection point between the connecting section 120 and the stationary contact. To facilitate the timely introduction of the generated electric arc into the arc-extinguishing chamber for arc extinguishing, an arc-inducing inclined surface 122 is formed on the side of the connecting section 120 away from the support section 110. The arc-inducing inclined surface 122 extends outward from the side that intersects with the stationary contact, so that the electric arc generated at the point where the connecting section 120 intersects with the stationary contact is guided outward by the arc-inducing inclined surface 122. This avoids severe burning of the electric arc in a localized area (at the on / off position) and also allows the electric arc to be transferred to a position closer to the arc-extinguishing chamber, which is beneficial for the electric arc to quickly enter the arc-extinguishing chamber for arc extinguishing.

[0047] In an optional embodiment of this application, the arc-initiating slope 122 extends continuously outward from the side where it intersects with the stationary contact. Existing disconnector products, considering their own dimensions, mechanism rotation angle, and moving contact opening speed, often have a limited range for the moving contact opening angle and length. Therefore, to accommodate more arc-extinguishing grids, the front end of the moving contact is often far from the arc-extinguishing grid. Furthermore, because the front end of the moving contact is mostly symmetrical, it is difficult to achieve a breakdown with the arc-extinguishing grid to ignite the arc. This also causes the arc generated during opening to burn continuously at the point where the moving contact intersects with the stationary contact, preventing rapid transfer and resulting in severe burn-out at the intersecting position, ultimately hindering smooth closing of the moving and stationary contacts. In this embodiment, the above-mentioned arrangement allows the generated arc to be rapidly transferred along the arc-initiating slope 122, preventing severe burning at the intersecting position of the stationary contact, ensuring smooth opening and closing, and extending service life.

[0048] like Figure 1 , Figure 3 , Figure 6 and Figure 9 As shown, the connecting section 120 includes a first contact piece 124 and a second contact piece 126 disposed opposite to each other. A receiving space for inserting a stationary contact is formed between the first contact piece 124 and the second contact piece 126. An arc-leading inclined surface 122 is located on the first contact piece 124 and the second contact piece 126 respectively.

[0049] Specifically, by using the relatively positioned first contact piece 124 and second contact piece 126, when the connecting section 120 is connected to the stationary contact, the stationary contact can be inserted between the first contact piece 124 and the second contact piece 126, and the first contact piece 124 and the second contact piece 126 are simultaneously connected to the stationary contact. This helps to increase the contact area between the connecting section 120 and the stationary contact, thereby reducing heat generation at the connection point. After an arc is generated on the side where the connecting section 120 cuts into the stationary contact, the arc can move along the arc-initiating inclined surface 122 of the first contact piece 124 and the second contact piece 126 respectively towards the side away from the side where the connecting section 120 cuts into the stationary contact, preventing the generated arc from burning for a long time on the side where the connecting section 120 cuts into the stationary contact.

[0050] like Figure 1 , Figure 3 and Figure 6 The arc-inducing inclined surface 122 has an arc-generating rounded corner 128 at its access position, which is located at the angle formed by the arc-inducing inclined surface 122 and the side of the connecting section 120 that cuts into the stationary contact. The arc-inducing inclined surface 122 has an arc-inducing rounded corner 129 at its exit position, which is located at the angle formed by the arc-inducing inclined surface 122 and the side of the connecting section 120 that is away from the side that cuts into the stationary contact.

[0051] Specifically, when the connecting section 120 separates from the stationary contact, the arc is generated at the arc-generating rounded corner 128. This rounded corner, compared to a sharp corner, offers better burn resistance, ensuring the stability of the connection between the connecting section 120 and the stationary contact. After the arc is generated at the arc-generating rounded corner 128 of the connecting section 120, the arc can move along the arc-initiating inclined surface 122 of the first contact piece 124 and the second contact piece 126 towards the arc-initiating rounded corner 129, preventing the generated arc from burning for an extended period at the arc-generating rounded corner 128. The arc-generating rounded corner 128 corresponds to the direction of the stationary contact's insertion, and the arc-initiating rounded corner 129 can penetrate deep into the narrow slit of the arc-extinguishing chamber. This allows the arc generated at the arc-generating rounded corner 128 to be promptly conducted along the arc-initiating inclined surface 122 to the arc-initiating rounded corner 129, facilitating its breakdown with the grid plates within the arc-extinguishing chamber and its extinguishing by the grid plates.

[0052] like Figure 1 , Figure 3 , Figure 6 and Figure 9 As shown, in an optional embodiment of this application, the first contact piece 124 and the second contact piece 126 are arranged in parallel or at a preset angle; the first contact piece 124 and the second contact piece 126 are respectively provided with flanges 127 on the side where they cut into the stationary contact, and the two flanges 127 are folded to opposite sides.

[0053] When the first contact piece 124 and the second contact piece 126 are arranged in parallel, they can better cooperate with the stationary contact to ensure stability during connection. When the first contact piece 124 and the second contact piece 126 form a preset angle, it is necessary to ensure that the distance between the stationary contact and the stationary contact is larger on the side where it cuts into the arc-extinguishing chamber, and smaller at the position where it penetrates into the arc-extinguishing chamber. In this case, the stationary contact can also be set at a certain angle to facilitate stable contact with the first contact piece 124 and the second contact piece 126 respectively. At the same time, the smaller distance facilitates the insertion into the arc-extinguishing chamber for arc extinguishing. In addition, by setting flanges 127 on the side where the first contact piece 124 and the second contact piece 126 cut into the stationary contact, and folding the two flanges 127 toward opposite sides, the flanges 127 can guide the stationary contact into the receiving space, thereby improving the smoothness of the connection.

[0054] like Figure 2 , Figure 5 , Figure 8 and Figure 10 As shown, the support section 110 is arranged in a straight line, and the angle between the plane where the arc-leading inclined surface 122 is located and the extension direction of the support section 110 is 100° to 140°.

[0055] Specifically, the angle between the plane of the arc-initiating inclined surface 122 and the extension direction of the support section 110 is α. When α < 100°, the slope of the arc-initiating inclined surface 122 is relatively large. When the moving contact is open, the distance from the arc root on the arc-initiating plate of the stationary contact to the arc-generating rounded corner 128 is basically the same as the distance from the arc root on the arc-initiating plate to the arc-initiating rounded corner 129. Therefore, it is very difficult for the arc root on the connecting section 120 to transfer from the arc-generating rounded corner 128 to the arc-initiating rounded corner 129. This will cause the arc root to remain at the arc-generating rounded corner 128 and continue to burn out. This not only fails to utilize the arc lengthening but is also detrimental to closing. When α > 140°, in order to ensure the contact area between the moving and stationary contacts, if the width of the connecting section 120 cuts into the stationary contact side remains unchanged, the arc-initiating rounded corner 129 will be too deep into the arc-extinguishing chamber and may even interfere with the grid plate. Moreover, the α angle is too large, making the rounded corner of the arc-initiating rounded corner 129 very sharp and the cross-section very small, which is very easy to burn out, thus affecting the electrical life. To ensure the stability of arc guidance, the aforementioned included angle needs to be kept within a suitable range. For example, α can be set to values ​​such as 100°, 110°, 120°, 130°, or 140°.

[0056] In an optional embodiment of this application, the arc-initiating fillet 129 protrudes beyond the arc-initiating inclined surface 122. Figure 2 (As shown).

[0057] Understandably, the arc-initiating inclined surface 122 can be a plane, a curved surface, or a surface with a bending angle, as long as the overall inclination is within the aforementioned angle range. Furthermore, when the arc-initiating inclined surface 122 is not planar, its overall smoothness must be ensured to guarantee the stability of arc guidance. Additionally, by making the arc-initiating fillet 129 protrude beyond the arc-initiating inclined surface 122, it is beneficial to ensure more material at the arc-initiating fillet 129 for arc burning, thus extending its service life.

[0058] like Figure 3 and Figure 4 As shown, in an optional embodiment of this application, the first contact piece 124 and the second contact piece 126 are respectively provided with bending portions 121, so that the first contact piece 124 forms a first connecting plate 1242 and a first arc-guiding plate 1244 that are connected to each other, and the second contact piece 126 forms a second connecting plate 1262 and a second arc-guiding plate 1264 that are connected to each other; the first connecting plate 1242 is parallel to the second connecting plate 1262, and the first arc-guiding plate 1244 is attached to the second arc-guiding plate 1264.

[0059] Specifically, by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 engages with the stationary contact, the stationary contact can be inserted into the position between the first connecting plate 1242 and the second connecting plate 1262, and connected to the first connecting plate 1242 and the second connecting plate 1262 respectively to form the required connection relationship. Furthermore, by attaching the first arc-starting plate 1244 to the second arc-starting plate 1264, the arc-starting radius 129 of the first contact piece 124 and the second contact piece 126 are combined, which helps to improve the burn-resistance of the arc-starting radius 129, thereby increasing the service life of the moving contact structure 100. Simultaneously, the attachment of the first arc-starting plate 1244 to the second arc-starting plate 1264 helps to ensure a narrower gap at the point where the connecting section 120 extends into the arc-extinguishing chamber, facilitating its insertion into the narrow slit of the arc-extinguishing chamber.

[0060] like Figure 6 and Figure 7 As shown, in another optional embodiment of this application, the first contact piece 124 and the second contact piece 126 are respectively provided with bending portions 121, so that the first contact piece 124 forms a first connecting plate 1242 and a first arc-leading plate 1244 that are connected to each other, and the second contact piece 126 forms a second connecting plate 1262 and a second arc-leading plate 1264 that are connected to each other; the first connecting plate 1242 is parallel to the second connecting plate 1262, the first arc-leading plate 1244 is parallel to the second arc-leading plate 1264 or has a preset included angle, and the distance between the first connecting plate 1242 and the second connecting plate 1262 is greater than the distance between the first arc-leading plate 1244 and the second arc-leading plate 1264.

[0061] Specifically, by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 engages with the stationary contact, the stationary contact can be inserted into the position between the first connecting plate 1242 and the second connecting plate 1262, and connected to the first connecting plate 1242 and the second connecting plate 1262 respectively to form the required connection relationship. Furthermore, by arranging the first arc-initiating plate 1244 and the second arc-initiating plate 1264 in parallel or at a preset angle, and by ensuring that the distance between the first connecting plate 1242 and the second connecting plate 1262 is greater than the distance between the first arc-initiating plate 1244 and the second arc-initiating plate 1264, the distance at the point where the connecting section 120 extends into the arc-extinguishing chamber is reduced, while the arc can be conducted along the arc-initiating inclined surface 122 of the first contact piece 124 and the second contact piece 126 respectively. This ensures that the arc is conducted to the arc-initiating rounded corner 129 in a timely manner, and also facilitates engagement with the narrow slot of the arc-extinguishing chamber.

[0062] like Figure 9As shown, the first contact piece 124 is provided with a bending portion 121 so that the first contact piece 124 forms a first connecting plate 1242 and a first arc-guiding plate 1244 that are connected to each other. The second contact piece 126 only includes a second connecting plate 1262 corresponding to the first connecting plate 1242. The first connecting plate 1242 and the first arc-guiding plate 1244 are parallel to the second connecting plate 1262, and the first arc-guiding plate 1244 is located between the plane where the first connecting plate 1242 is located and the plane where the second connecting plate 1262 is located.

[0063] By adopting the above configuration, and by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 engages with the stationary contact, the stationary contact can be inserted into the position between the first connecting plate 1242 and the second connecting plate 1262, and connected to the first connecting plate 1242 and the second connecting plate 1262 respectively to form the required connection relationship. Furthermore, the generated arc can be conducted along the arc-initiating inclined surface 122 of the first contact piece 124 to the arc-initiating fillet 129, and the first arc-initiating plate 1244 is located between the plane of the first connecting plate 1242 and the plane of the second connecting plate 1262, which helps to better reduce the distance between the connecting section 120 and the arc-extinguishing chamber, facilitating better engagement with the arc-extinguishing chamber.

[0064] In an optional embodiment of this application, the moving contact structure 100 is integrally formed, or the moving contact structure 100 includes a first body and a second body disposed opposite to each other, and the first body and the second body are connected to form a support section 110 and a connecting section 120.

[0065] For example, the moving contact structure 100 can be manufactured by integral stamping and bending to ensure better consistency and assembly quality. Alternatively, it can be connected by welding or riveting two relatively opposed plates, as long as the required structural form is met.

[0066] like Figure 11 As shown in the illustration, this application also discloses a switching unit 200, including a housing 210 and a rotating bracket 220 disposed within the housing 210. The rotating bracket 220 is provided with the moving contact structure 100 described in the previous embodiment. The housing 210 also contains a stationary contact 230 corresponding to the moving contact structure 100, and an arc-extinguishing component corresponding to the stationary contact 230. The arc-extinguishing component can be... Figure 11 The arc-extinguishing chamber 240 can also employ a combination of permanent magnets and arc-extinguishing channels for arc extinguishing. This switching unit 200 includes the same structure and beneficial effects as the moving contact structure 100 in the aforementioned embodiments. The structure and beneficial effects of the moving contact structure 100 have been described in detail in the aforementioned embodiments and will not be repeated here.

[0067] like Figure 12 As shown in the illustration, this application also discloses a disconnecting switch 300, including multiple stacked switch units 200 and an operating mechanism 310 connected to the switch units 200. The operating mechanism 310 is provided with an operating handle 320. The operating mechanism 310 can be connected to the switch units 200 in a cascaded manner, i.e., the operating mechanism 310 is connected to the first switch unit 200, and each switch unit is connected sequentially. The operating mechanism 310 can also be connected to the switch units 200 via a through-shaft to establish the required connection relationship with each switch unit 200. Each switch unit 200 can be simultaneously switched on and off through the operating mechanism 310. This application does not impose specific limitations on this aspect.

[0068] By employing the above method, when the disconnecting switch 300 is in use, the electric arc generated during opening can quickly enter the arc-extinguishing chamber 240 or the arc-extinguishing channel for arc extinguishing, and reduce the burning degree at the moving contact's on / off position. This helps ensure the stability of the disconnecting switch 300 during use.

[0069] This application also discloses a power supply system, including: a DC source, a power conversion unit, and a disconnect switch 300. The disconnect switch 300 is connected between the DC source and the power conversion unit, and tripping is achieved by operating the disconnect switch 300 in the event of a fault in the DC source or the power conversion unit. This helps to ensure the stability of the power supply system during use.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A moving contact structure (100), characterized in that, The system includes a support section (110) and connecting sections (120) disposed at opposite ends of the support section (110). The connecting sections (120) are used to connect or disconnect with a stationary contact. The width of the connecting section (120) on the side where the stationary contact is inserted is smaller than the width of the connecting section (120) on the side away from the stationary contact. An arc-inducing slope (122) is formed on the side of the connecting section (120) away from the support section (110). The connecting section (120) includes a first contact piece (124) and a second contact piece (126) disposed opposite to each other. An accommodating space for inserting the stationary contact is formed between the first contact piece (124) and the second contact piece (126). The arc-inducing slope (122) is located on the first contact piece (124) and the second contact piece (126), respectively. Above; the first contact piece (124) and the second contact piece (126) are respectively provided with a bending portion (121) so that the first contact piece (124) forms a first connecting plate (1242) and a first arc-leading plate (1244) that are connected to each other, and the second contact piece (126) forms a second connecting plate (1262) and a second arc-leading plate (1264) that are connected to each other; the first connecting plate (1242) is parallel to the second connecting plate (1262), the first arc-leading plate (1244) is parallel to the second arc-leading plate (1264) or has a preset angle, and the distance between the first connecting plate (1242) and the second connecting plate (1262) is greater than the distance between the first arc-leading plate (1244) and the second arc-leading plate (1264); Alternatively, the first contact piece (124) is provided with a bent portion (121) so that the first contact piece (124) forms a first connecting plate (1242) and a first arc-leading plate (1244) that are connected to each other, and the second contact piece (126) only includes a second connecting plate (1262) corresponding to the first connecting plate (1242); the first connecting plate (1242) and the first arc-leading plate (1244) are parallel to the second connecting plate (1262) respectively, and the first arc-leading plate (1244) is located between the plane where the first connecting plate (1242) is located and the plane where the second connecting plate (1262) is located.

2. The moving contact structure (100) according to claim 1, characterized in that, The arc-inducing inclined surface (122) extends continuously outward from the side that cuts into the stationary contact.

3. The moving contact structure (100) according to claim 1 or 2, characterized in that, The support section (110) is arranged in a straight line, and the angle between the plane where the arc-leading inclined surface (122) is located and the extension direction of the support section (110) is 100° to 140°.

4. The moving contact structure (100) according to claim 1, characterized in that, The lead-out position of the arc-leading inclined surface (122) is provided with an arc-leading rounded corner (129), and the lead-out position is located at the angle formed by the arc-leading inclined surface (122) and the side of the connecting section (120) that is away from the side that cuts into the stationary contact.

5. The moving contact structure (100) according to claim 4, characterized in that, The access position of the arc-inducing inclined surface (122) is provided with an arc-generating rounded corner (128), and the access position is located at the angle formed by the arc-inducing inclined surface (122) and the side of the connecting section (120) that cuts into the stationary contact.

6. The moving contact structure (100) according to claim 1, characterized in that, The first contact piece (124) and the second contact piece (126) are arranged in parallel or at a preset angle; the first contact piece (124) and the second contact piece (126) are respectively provided with a flange (127) on the side where they cut into the stationary contact, and the two flanges (127) are folded to opposite sides.

7. The moving contact structure (100) according to claim 5, characterized in that, The arc-inducing fillet (129) protrudes from the arc-inducing inclined surface (122).

8. The moving contact structure (100) according to claim 4 or 5, characterized in that, The first contact piece (124) and the second contact piece (126) are respectively provided with a bending portion (121) so that the first contact piece (124) forms a first connecting plate (1242) and a first arc-leading plate (1244) that are connected to each other, and the second contact piece (126) forms a second connecting plate (1262) and a second arc-leading plate (1264) that are connected to each other; the first connecting plate (1242) is parallel to the second connecting plate (1262), and the first arc-leading plate (1244) is in contact with the second arc-leading plate (1264).

9. The moving contact structure (100) according to claim 1 or 2, characterized in that, The moving contact structure (100) is integrally formed, or the moving contact structure (100) includes a first body and a second body disposed opposite to each other, the first body and the second body being connected to form the support section (110) and the connecting section (120).

10. A switching unit (200), characterized in that, The device includes a housing (210) and a rotating bracket (220) disposed within the housing (210), wherein the rotating bracket (220) is provided with a moving contact structure (100) as described in any one of claims 1-9; the housing (210) is also provided with a stationary contact (230) corresponding to the moving contact structure (100) and an arc extinguishing component corresponding to the stationary contact (230).

11. A disconnecting switch (300), characterized in that, The device includes multiple stacked switch units (200) as described in claim 10, and an operating mechanism (310) connected to the switch units (200), wherein the operating mechanism (310) is provided with an operating handle (320).

12. A power supply system, characterized in that, include: The DC source, the power conversion unit, and the disconnecting switch (300) as described in claim 11, wherein the disconnecting switch (300) is connected between the DC source and the power conversion unit, and the circuit is tripped by operating the disconnecting switch (300) in the event of a fault in the DC source or the power conversion unit.

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