Disconnector and power conversion device

Abstract

The application relates to the technical field of electric appliance switches, in particular to an isolating switch and a power conversion device. The application aims to solve the problem of poor stability of the isolating switch due to the deviation of the static contact. The application provides an isolating switch which comprises a supporting seat and a static contact, the static contact comprises a connecting part and an extending part, the connecting part is provided with a mounting hole used for mounting a connecting piece connected with a wire, the supporting seat is provided with a limiting cavity, and the extending part is arranged in the limiting cavity. When the connecting piece is matched with the mounting hole, the connecting piece will generate a torsion force perpendicular to the insertion direction of the connecting piece. The extending part is arranged at the end of the connecting part away from the contact part, the extending part is bent relative to the connecting part, when the torsion force acts on the extending part, part of the torsion force will be decomposed into the insertion direction of the connecting piece, and is converted into the pressure of the contact between the extending part and the limiting cavity, so that the connection between the static contact and the supporting seat is more compact, the deviation of the static contact is avoided, and the stability of the isolating switch is improved.

Description

Technical Field

[0001] This application relates to the field of electrical switch technology, specifically to an isolating switch and a power conversion device. Background Technology

[0002] A disconnecting switch includes a support base, a stationary contact, and a moving contact. The stationary contact is fixedly connected to the support base, and the moving contact is rotatably connected to the support base. The stationary contact includes a connecting part with a mounting hole. By connecting the connecting part to the mounting hole and a wire, the disconnecting switch can participate in the circuit connection. However, when the connecting part is twisted and fixed, the connecting part generates torque and acts on the stationary contact, causing the stationary contact to shift and reducing the stability of the disconnecting switch. Utility Model Content

[0003] This application provides a disconnecting switch and a power conversion device that can prevent the stationary contact from shifting and improve the stability of the disconnecting switch.

[0004] In a first aspect, this application provides a disconnecting switch, including a support base, a stationary contact, and a moving contact. The stationary contact is fixedly connected to the support base, and the moving contact is rotatably connected to the support base. The stationary contact includes a contact portion, a connecting portion, and an extension portion. The contact portion is connected to the connecting portion and is used to contact the moving contact. The connecting portion has a mounting hole for mounting a connector for connecting to a wire. The extension portion is disposed at the end of the connecting portion opposite to the contact portion, and the extension portion is bent relative to the connecting portion. The support base has a limiting cavity, and the extension portion is disposed within the limiting cavity.

[0005] The connecting part has mounting holes for installing connectors that connect to wires. These connectors allow the connecting part to connect to the wires, thus connecting the stationary contact to the circuit. Since the stationary contact is fixedly connected to the support base, and the moving contact is rotatably connected to the support base, the stationary contact includes a contact portion that connects to the moving contact. By controlling the rotation angle of the moving contact, the contact and separation between the contact portion and the moving contact can be controlled, thereby controlling the circuit's on / off state.

[0006] When the connector mates with the mounting hole, the connector generates torque perpendicular to its insertion direction; that is, the torque is perpendicular to the extension direction of the connecting part. Because the extending part is bent relative to the connecting part, meaning there is an angle between the extension direction and the connecting part's extension direction, some of the torque acting on the extending part is distributed to the connector's insertion direction, transforming into pressure between the extending part and the limiting cavity. This results in a tighter connection between the stationary contact and the support, preventing the stationary contact from shifting and improving the stability of the disconnector.

[0007] In some embodiments that may include the above embodiments, the connecting portion includes a first surface and a second surface opposite to each other. From the insertion direction of the connector, the first surface and the second surface are arranged sequentially, and the extension portion is bent toward the side closer to the second surface.

[0008] The first and second sides are arranged sequentially according to the insertion direction of the connector. That is, when the connector is inserted, it first passes through the first side and then through the second side. The extension is bent towards the side closer to the second side, which only increases the width of the stationary contact while keeping the height of the stationary contact unchanged. This helps to reduce the volume of the stationary contact and facilitates the miniaturization of the disconnecting switch.

[0009] In some embodiments that may include the above embodiments, the contact portion, the connecting portion, and the extension portion are an integral structural component.

[0010] The contact part, connection part, and extension part are integrated into one structural component. In other words, the stationary contact is molded as a single piece, which reduces the number of parts and assembly steps of the stationary contact, lowers the production cost of the disconnecting switch, and improves the production efficiency of the disconnecting switch.

[0011] In some embodiments that may include the above embodiments, a first groove is provided on the support base, and at least a portion of the connecting portion is disposed in the first groove. The first groove is used to limit the movement of the stationary contact along a first direction, which is perpendicular to the insertion direction of the connector.

[0012] The connecting part can be disposed within the first groove. Through the cooperation between the connecting part and the first groove, the connecting part and the support base are fixedly connected. The first groove can limit the movement of the stationary contact along a first direction, which is perpendicular to the insertion direction of the connector. The first groove can prevent the stationary contact from shifting in the first direction, thereby improving the stability of the stationary contact and thus enhancing the stability of the disconnecting switch.

[0013] In some embodiments that may include the above embodiments, a second groove is provided on the support base, and a contact portion is disposed in the second groove. The second groove is used to limit the movement of the stationary contact along a second direction, which is parallel to the insertion direction of the connector.

[0014] The contact portion is disposed within the second groove. Through the cooperation between the contact portion and the second groove, a fixed connection between the contact portion and the support base can be achieved. The second groove can limit the movement of the stationary contact along a second direction, which is parallel to the insertion direction of the connector. The second groove can prevent the stationary contact from shifting in the second direction, thereby improving the stability of the stationary contact and thus enhancing the stability of the disconnecting switch.

[0015] In some embodiments that may include the above embodiments, the limiting cavity includes a limiting groove formed on the support.

[0016] The limiting cavity includes a limiting groove formed on the support base. The limiting groove, in conjunction with the extension portion, secures the extension portion to the support base. The limiting groove on the support base has lower manufacturing costs and fewer manufacturing steps, thus reducing the manufacturing cost and difficulty of the disconnect switch.

[0017] In some embodiments that may include the above embodiments, a limiting member is also provided on the support base. The limiting member is located on the side of the stationary contact away from the side plate, and the limiting member and the side plate form a limiting cavity.

[0018] A limiting member is located on the side of the stationary contact away from the side plate. The limiting member abuts against the stationary contact, clamping the stationary contact between the side plate and the limiting member, thus achieving a fixed connection between the stationary contact and the support base. The limiting member and the side plate form a limiting cavity, and the extension portion is located within the limiting cavity. Through the cooperation between the limiting cavity and the extension portion, the support base can restrict the position of the extension portion, achieving a fixed connection between the extension portion and the support base.

[0019] The limiting member and the side plate form a limiting cavity, which can fix the connecting part and the contact part to the support base at the same time, and fix the extension part to the support base. While ensuring the connection strength between the stationary contact and the support base, the support base can restrict the position of the extension part and decompose the torque of the connecting member on the stationary contact.

[0020] In some embodiments that may include the above-described embodiments, the limiting member includes a first limiting plate and a second limiting plate, with an extension portion located between the side plate and the first limiting plate, and the extension portion abutting against the side plate and the first limiting plate. The second limiting plate is disposed on the side of the extension portion away from the connecting portion, and the extension portion abuts against the second limiting plate. The first limiting plate, the second limiting plate, and the side plate form a limiting cavity.

[0021] The extension portion is located between the side plate and the first limiting plate. The extension portion abuts against the side plate and the first limiting plate. The side plate and the first limiting plate can restrict the movement of the extension portion along the insertion direction of the connector, prevent the stationary contact from shifting, and improve the stability of the stationary contact.

[0022] The second limiting plate is located on the side of the extension portion away from the connecting portion. The extension portion abuts against the second limiting plate, which blocks the extension portion and restricts its movement along the insertion direction perpendicular to the connecting member, preventing the stationary contact from shifting. Simultaneously, when the disconnecting switch is open, current flows through the gap in the air, causing the air to ionize and form an electric arc. At this time, the extension portion will also form an electric arc. The second limiting plate can separate the extension portion from the surrounding cavity, preventing the electric arc from damaging other components on the support base.

[0023] In some embodiments that may include the above embodiments, the limiting member is provided with a third groove, and the contact portion is disposed in the third groove. The third groove is used to limit the movement of the stationary contact along a first direction, which is perpendicular to the insertion direction of the connector.

[0024] The contact portion is positioned within the third groove, which restricts the position of the contact portion and limits its movement along the insertion direction perpendicular to the connector, thus preventing the stationary contact from shifting and improving its stability.

[0025] In some embodiments that may include the above embodiments, the groove wall of the third groove and the first limiting plate form a receiving cavity, which is used to receive the connecting member.

[0026] Since the connector needs to be inserted into the connecting part, the connecting part abuts against the limiting member, and the limiting member affects the connector's passage through the mounting hole. The groove wall of the third groove and the first limiting plate form a receiving cavity, which can be used to receive the connector, allowing the connector to pass through the mounting hole and be fixed to the stationary contact.

[0027] Secondly, embodiments of this application provide a power conversion device, including an isolating switch and an inverter circuit, wherein the connection portion of the isolating switch is used to connect to a photovoltaic panel or to the inverter circuit via a connector.

[0028] The power conversion device provided in this application includes the isolating switch in any of the above embodiments, so both can solve the same technical problem and achieve the same technical effect. Attached Figure Description

[0029] Figure 1 A schematic diagram of a photovoltaic power supply system provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the disconnecting switch provided in an embodiment of this application;

[0031] Figure 3 A schematic diagram of the switching unit layer provided in the embodiments of this application. Figure 1 ;

[0032] Figure 4 A side view of the moving contact and stationary contact provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure when the moving contact and the stationary contact are in contact, provided in an embodiment of this application.

[0034] Figure 6 This is a side view of the moving contact and stationary contact in the related technology;

[0035] Figure 7Side view of the moving contact and stationary contact provided in the embodiments of this application. Figure 1 ;

[0036] Figure 8 Top view of the switching unit layer provided in the embodiments of this application Figure 1 ;

[0037] Figure 9 A top view of the support base provided in an embodiment of this application;

[0038] Figure 10 Side view of the moving contact and stationary contact provided in the embodiments of this application. Figure 2 ;

[0039] Figure 11 Schematic diagram of the structure of the stationary contact provided in the embodiments of this application Figure 1 ;

[0040] Figure 12 Side view of the moving contact and stationary contact provided in the embodiments of this application. Figure 3 ;

[0041] Figure 13 Schematic diagram of the structure of the stationary contact provided in the embodiments of this application Figure 2 ;

[0042] Figure 14 A schematic diagram of the switching unit layer provided in the embodiments of this application. Figure 2 ;

[0043] Figure 15 This is a schematic diagram of the support base provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10: Photovoltaic power supply system; 11: Photovoltaic panel; 12: Inverter circuit; 20: Disconnecting switch; 21: Control structure; 22: Switch unit layer; 31: Support base; 311: Limiting cavity; 312: Side plate; 313: Mounting groove; 32: Stationary contact; 33: Moving contact; 331: First contact piece; 332: Second contact piece; 34: Connector; 41: Contact part; 42: Connecting part; 42a: First surface; 42b: Second surface; 421: Mounting hole; 43: Extension part; 44: First part; 45: Second part; 51: Limiting groove; 52: Limiting component; 521: First limiting plate; 522: Second limiting plate; 53: Receiving cavity; 61: First groove; 62: Second groove; 63: Third groove. Detailed Implementation

[0046] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0048] Furthermore, in the embodiments of this application, directional terms such as "up," "down," "left," "right," "horizontal," and "vertical" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0049] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, an electrical connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0050] Please refer to Figure 1 The photovoltaic (PV) power supply system 10 includes photovoltaic panels 11 and a power conversion device, wherein the power conversion device includes an isolating switch 20 and an inverter (DC / AC) circuit 12. The photovoltaic panels 11 convert light energy into electrical energy, and the inverter circuit 12 converts the DC power from the photovoltaic panels 11 into AC power and transmits it to the power grid. The isolating switch 20 is located between the photovoltaic panels 11 and the inverter circuit 12. One end of the isolating switch 20 is connected to the photovoltaic panels 11, and the other end of the isolating switch 20 is connected to the inverter circuit 12. By controlling the opening and closing of the isolating switch 20, the connection or disconnection between the photovoltaic panels 11 and the inverter circuit 12 can be controlled.

[0051] For example, when the voltage and / or current in the circuit is greater than a preset range, the isolating switch 20 can be controlled to be in the off state, so that the circuit between the photovoltaic panel 11 and the inverter circuit 12 is disconnected, thus avoiding short circuit and burnout of electronic components in the circuit.

[0052] Please refer to Figure 2The disconnector switch 20 typically includes a control structure 21 and a switch unit layer 22. The control structure 21 is connected to the switch unit layer 22. By adjusting the control structure 21, the switch unit layer 22 can be controlled to switch between the closed state and the open state.

[0053] This application does not limit the number of switch unit layers 22 in its embodiments. To form a complete circuit, the number of switch unit layers 22 is usually greater than or equal to 2. In embodiments where the number of switch unit layers 22 is two, one switch unit layer 22 can be connected to the photovoltaic panel 11 ( Figure 1 The positive terminal of the photovoltaic panel 11 is connected to the positive terminal, and the other switch unit layer 22 is connected to the negative terminal. The control structure 21 is connected to both switch unit layers 22 and controls the two switch unit layers 22 simultaneously. That is, the positive and negative terminals of the photovoltaic panel 11 will be simultaneously disconnected or connected.

[0054] The isolating switch 20 controls the connection and disconnection of the positive and negative terminals of the photovoltaic panel 11, which can ensure that the entire DC circuit from the photovoltaic panel 11 to the inverter circuit 12 is completely cut off, achieving complete isolation and preventing the unconnected line from still being energized, thus preventing serious electric shock accidents.

[0055] Continue to refer to Figure 1 and Figure 2 In some embodiments, the photovoltaic power supply system 10 may include multiple photovoltaic panels 11. Correspondingly, the disconnecting switch 20 includes multiple switch unit layers 22, which are stacked. This application does not limit the connection method of the multiple photovoltaic panels 11. For example, the multiple photovoltaic panels 11 can be connected in series, or they can be connected in parallel.

[0056] Please refer to Figure 3 The switch unit layer 22 includes a support base 31, a stationary contact 32, and a moving contact 33. The stationary contact 32 is fixedly connected to the support base 31, and the moving contact 33 is rotatably connected to the support base 31. Since the disconnect switch 20 needs to ensure electrical isolation, the material of the support base 31 is an insulating material. This application embodiment does not limit the specific material of the support base 31. Optionally, the material of the support base 31 can be plastic.

[0057] Since an electrical connection is to be achieved when the stationary contact 32 and the moving contact 33 are in contact, both the stationary contact 32 and the moving contact 33 are made of metal. In this embodiment, the specific materials of the stationary contact 32 and the moving contact 33 are not limited. The materials of the stationary contact 32 and the moving contact 33 can be copper, silver, etc.

[0058] Please refer to Figure 4The moving contact 33 is composed of a first contact piece 331 and a second contact piece 332 stacked together. The second contact piece 332 is placed parallel to the stationary contact 32, and the two ends of the first contact piece 331 are bent upward relative to the second contact piece 332. In the thickness direction z of the disconnector switch 20, the thickness D1 of the moving contact 33 is less than the thickness D2 of the stationary contact 32. The fact that D1 is less than D2 ensures that when the stationary contact 32 contacts the moving contact 33, the first contact piece 331 and the second contact piece 332 clamp the stationary contact 32, ensuring close contact between the stationary contact 32 and the moving contact 33, and ensuring the stability of the circuit conduction.

[0059] Since the first contact 331 is mainly used to press the stationary contact 32, and the second contact 332 is mainly used to make an electrical connection with the stationary contact 32, the materials of the first contact 331 and the second contact 332 can be different. Optionally, the first contact 331 can be made of beryllium, which can improve the strength of the first contact 331. The second contact 332 can be made of copper (T2) to ensure the conductivity between the second contact 332 and the stationary contact 32.

[0060] Please refer to Figure 5 and Figure 6 The stationary contact 32 includes a contact portion 41 and a connecting portion 42. The contact portion 41 is connected to the connecting portion 42 and is used to contact the moving contact 33. The connecting portion 42 has a mounting hole 421 for mounting a connector 34 that is connected to a wire.

[0061] Due to the moving contact 33 and the support base 31 ( Figure 3 (As shown) Rotary connection, by controlling the rotation angle of the moving contact 33, the positional relationship between the moving contact 33 and the stationary contact 32 can be changed, thereby changing the switch unit layer 22 ( Figure 3 The state shown.

[0062] To ensure that the contact portion 41 and the moving contact 33 can make and separate, the projection of the contact portion 41 is parallel to the projection of the moving contact 33 in the thickness direction z of the switch unit layer 22.

[0063] When contact portion 41 contacts moving contact 33, stationary contact 32 and moving contact 33 are in contact, forming a circuit, and switch unit layer 22 is in a closed state, and the circuit is conducting. When contact portion 41 is not in contact with moving contact 33, stationary contact 32 and moving contact 33 are separated, forming an open circuit, switch unit layer 22 is in an open state, and the circuit is turned off.

[0064] Continue to refer to Figure 3 and Figure 5It is understood that the switch unit layer 22 typically includes a pair of stationary contacts 32. In an embodiment where the disconnector switch 20 is applied to the photovoltaic power supply system 10, one stationary contact 32 is connected to the photovoltaic panel 11, and the other stationary contact 32 is connected to the inverter circuit 12. The wires of the photovoltaic panel 11 and the inverter circuit 12 can be connected to the connection portion 42 through the connector 34, thereby realizing the connection between the photovoltaic panel 11 and the switch unit layer 22, as well as the connection between the inverter circuit 12 and the switch unit layer 22.

[0065] This application does not limit the mounting hole 421 and the connector 34. For example, the connector 34 can be a screw, and correspondingly, the mounting hole 421 can be a threaded hole. For ease of explanation, the following example uses a screw as the connector 34.

[0066] When the connector 34 is fixed to the mounting hole 421, the connector 34 needs to be twisted to fix it. When the connector 34 is twisted, a torque perpendicular to the insertion direction of the connector 34 will be generated. The torque generated by the connector 34 acts on the stationary contact 32, causing the stationary contact 32 to shift and reducing the stability of the disconnect switch 20.

[0067] Continue to refer to Figure 7 and Figure 8 In this embodiment, the stationary contact 32 of the disconnecting switch 20 further includes an extension portion 43, which is disposed at the end of the connecting portion 42 away from the contact portion 41, and the extension portion 43 is bent relative to the connecting portion 42. The support base 31 has a limiting cavity 311, and the extension portion 43 is disposed within the limiting cavity 311.

[0068] The support base 31 has a limiting cavity 311, and the extension portion 43 is disposed in the limiting cavity 311. The limiting cavity 311 and the extension portion 43 can increase the contact area between the stationary contact 32 and the support base 31, thereby increasing the friction between the support base 31 and the stationary contact 32, which can reduce the influence of torque on the stationary contact 32 and reduce the offset of the stationary contact 32.

[0069] When the connector 34 mates with the mounting hole 421, the connector 34 generates a torque perpendicular to its insertion direction, that is, the torque is perpendicular to the extension direction of the connecting portion 42. Since the extension portion 43 is bent relative to the connecting portion 42, that is, there is a certain angle between the extension direction of the extension portion 43 and the extension direction of the connecting portion 42, when the torque acts on the extension portion 43, part of the torque will be decomposed into the insertion direction of the connector 34, and converted into pressure between the extension portion 43 and the limiting cavity 311. This makes the connection between the stationary contact 32 and the support base 31 tighter, thereby preventing the stationary contact 32 from shifting and improving the stability of the disconnecting switch 20.

[0070] Continue to refer to Figure 8 In the above embodiment, the connecting portion 42 includes a first surface 42a and a second surface 42b opposite to each other. From the insertion direction of the connector 34, the first surface 42a and the second surface 42b are arranged sequentially, and the extension portion 43 is bent toward the side closer to the second surface 42b.

[0071] From the insertion direction of the connector 34, the first surface 42a and the second surface 42b are arranged sequentially. That is, when the connector 34 is inserted, it first passes through the first surface 42a and then through the second surface 42b. The extension portion 43 bends towards the side closer to the second surface 42b, which only increases the width of the stationary contact 32 while keeping the height of the stationary contact 32 unchanged. This helps to reduce the volume of the stationary contact 32 and facilitates the miniaturization of the disconnector switch 20.

[0072] Continue to refer to Figure 8 In some embodiments, the contact portion 41, the connecting portion 42, and the extension portion 43 are an integral structural component.

[0073] The contact part 41, the connecting part 42, and the extension part 43 are integrated structural components. In other words, the stationary contact 32 is integrally formed, which can reduce the number of parts and assembly steps of the stationary contact 32, reduce the production cost of the disconnecting switch 20, and improve the production efficiency of the disconnecting switch 20.

[0074] Please refer to Figure 8 and Figure 9 In some embodiments, the support base 31 is provided with a mounting groove 313 for accommodating screws, which can be directly inserted into the mounting hole 421. Figure 5 (as shown) and fixed with mounting hole 421. When the stationary contact 32 is with photovoltaic panel 11 ( Figure 1 As shown, during connection, the front end of the photovoltaic panel 11's wire is a U-shaped groove. The U-shaped groove can be inserted between the mounting hole 421 and the screw head, allowing the wire to connect to the screw. The screw enables the connection between the photovoltaic panel 11's wire and the stationary contact 32.

[0075] Continue to refer to Figure 8 and Figure 9 In the above embodiment, a first groove 61 is provided on the support base 31, and at least a portion of the connecting portion 42 is disposed in the first groove 61. The first groove 61 is used to limit the movement of the stationary contact 32 along a first direction, which is perpendicular to the insertion direction of the connector 34.

[0076] The connecting portion 42 can be disposed within the first groove 61. Through the cooperation between the connecting portion 42 and the first groove 61, the connecting portion 42 and the support base 31 are fixedly connected. The first groove 61 can limit the movement of the stationary contact 32 along a first direction, which is perpendicular to the insertion direction of the connector 34. The first groove 61 can prevent the stationary contact 32 from shifting in the first direction, thereby improving the stability of the stationary contact 32 and thus enhancing the stability of the disconnect switch 20.

[0077] Continue to refer to Figure 8 and Figure 9 In the above embodiment, the support base 31 is provided with a second groove 62, and the contact portion 41 is disposed in the second groove 62. The second groove 62 is used to limit the movement of the stationary contact 32 along a second direction, which is parallel to the insertion direction of the connector 34.

[0078] The contact portion 41 is disposed within the second groove 62. Through the cooperation between the contact portion 41 and the second groove 62, a fixed connection between the contact portion 41 and the support base 31 can be achieved. The second groove 62 can limit the movement of the stationary contact 32 along a second direction, which is parallel to the insertion direction of the connector 34. The second groove 62 can prevent the stationary contact 32 from shifting in the second direction, thereby improving the stability of the stationary contact 32 and thus enhancing the stability of the disconnect switch 20.

[0079] Continue to refer to Figure 8 and Figure 9 In the above embodiment, the limiting cavity 311 includes a limiting groove 51 formed on the support base 31.

[0080] The limiting cavity 311 includes a limiting groove 51 formed on the support base 31. The limiting groove 51 can be used to fix the extension portion 43 to the support base 31 through cooperation with the extension portion 43. The limiting groove 51 on the support base 31 has a lower manufacturing cost and fewer manufacturing steps, which can reduce the manufacturing cost and difficulty of the disconnect switch 20.

[0081] In some embodiments, the limiting groove 51 and the support base 31 are integrally formed. Compared with slotting the support base 31, the integral forming of the limiting groove 51 and the support base 31 can further reduce the manufacturing cost and manufacturing steps of the support base 31. At the same time, the integral forming method can ensure that the support base 31 has greater strength, higher dimensional stability of the support component, and higher surface flatness.

[0082] Please refer to Figure 10 and Figure 11In some embodiments, the connecting portion 42 may include a first portion 44 and a second portion 45. The first portion 44 is connected to the extension portion 43, and a mounting hole 421 is provided in the first portion 44. One end of the second portion 45 is connected to the first portion 44, and the other end of the second portion 45 is connected to the contact portion 41. The extending direction of the second portion 45 is perpendicular to the extending direction of the first portion 44 (parallel to the connecting member 34). Figure 8 The insertion direction (as shown) is perpendicular to the extension direction of the contact portion 41.

[0083] The second part 45 can change the extension direction of the first part 44. Since the mounting hole 421 is located in the first part 44, the second part 45 can change the through direction of the mounting hole 421, thereby changing the insertion direction of the connector 34. The second part 45 can be set to change the insertion direction of the connector 34 according to the actual needs of the disconnector switch 20 and in combination with the structure of the support base 31.

[0084] In the switch unit layer 22 ( Figure 8 In the embodiments shown, including multiple embodiments, since multiple switch unit layers 22 are stacked, two adjacent switch unit layers 22 are connected to the photovoltaic panel 11. Figure 1 As shown in the figure, a certain creepage distance should be ensured between the connectors 34 of two adjacent switch unit layers 22 to achieve electrical isolation.

[0085] At this point, by setting the second part 45, the insertion direction of the connector 34 can be changed, thereby increasing the creepage distance between two adjacent switch unit layers 22 and ensuring the effect of electrical isolation.

[0086] In embodiments where the connecting portion 42 includes a first portion 44 and a second portion 45, the second portion 45 is disposed in the first groove 61. Figure 9 As shown, the first groove 61 can restrict the movement of the stationary contact 32 in the first direction by restricting the movement of the second part 45 in the first direction.

[0087] Please refer to Figure 12 and Figure 13 In some embodiments, the extending direction of the connecting portion 42 is perpendicular to the extending direction of the contact portion 41, and the extending portion 43 is disposed on the side of the connecting portion 42 away from the contact portion.

[0088] Please refer to Figure 14 In the above embodiment, the support base 31 includes a side plate 312, the first surface 42a of the connecting portion 42 is parallel to the side plate 312, and the connector 34 ( Figure 8 (As shown) can be directly inserted from the first surface 42a and through the mounting hole 421. When the stationary contact 32 is with the photovoltaic panel 11 ( Figure 1When connected (as shown), the front end of the photovoltaic panel 11 has a round hole, and the screw can pass through the round hole and the mounting hole 421 and be fixed with the mounting hole 421 to realize the connection between the photovoltaic panel 11's wire and the stationary contact 32.

[0089] Please refer to Figure 14 and Figure 15 In the above embodiment, a limiting member 52 is also provided on the support base 31. The limiting member 52 is provided on the side of the stationary contact 32 away from the side plate 312, and the limiting member 52 and the side plate 312 form a limiting cavity 311.

[0090] A limiting member 52 is disposed on the side of the stationary contact 32 opposite to the side plate 312. The limiting member 52 can abut against the stationary contact 32, so that the stationary contact 32 is clamped between the side plate 312 and the limiting member 52, thereby achieving a fixed connection between the stationary contact 32 and the support base 31. The limiting member 52 and the side plate 312 form a limiting cavity 311, and the extension portion 43 is disposed within the limiting cavity 311. Through the cooperation between the limiting cavity 311 and the extension portion 43, the support base 31 can restrict the position of the extension portion 43, thereby achieving a fixed connection between the extension portion 43 and the support base 31.

[0091] The limiting member 52 and the side plate 312 form a limiting cavity 311, which can fix the connecting part 42 and the contact part 41 to the support base 31, while also fixing the extension part 43 to the support base 31. This ensures the connection strength between the stationary contact 32 and the support base 31, while allowing the support base 31 to restrict the position of the extension part 43, thus disassembling the connecting member 34. Figure 8 (As shown) Torque on stationary contact 32.

[0092] Continue to refer to Figure 14 and Figure 15 In the above embodiment, the limiting member 52 includes a first limiting plate 521 and a second limiting plate 522. The extension portion 43 is located between the side plate 312 and the first limiting plate 521, and the extension portion 43 abuts against the side plate 312 and the first limiting plate 521. The second limiting plate 522 is disposed on the side of the extension portion 43 opposite to the connecting portion 42, and the extension portion 43 abuts against the second limiting plate 522. The first limiting plate 521, the second limiting plate 522, and the side plate 312 form a limiting cavity 311.

[0093] The extension portion 43 is located between the side plate 312 and the first limiting plate 521, and the extension portion 43 abuts against the side plate 312 and the first limiting plate 521. The side plate 312 and the first limiting plate 521 can restrict the extension portion 43 along the connector 34. Figure 8 The insertion direction is moved (as shown) to avoid the stationary contact 32 from shifting and to improve the stability of the stationary contact 32.

[0094] The second limiting plate 522 is disposed on the side of the extension portion 43 opposite to the connecting portion 42. The extension portion 43 abuts against the second limiting plate 522. The second limiting plate 522 can block the extension portion 43 and restrict the extension portion 43 from moving perpendicular to the connecting member 34. Figure 8 The insertion direction (as shown) is moved to prevent the stationary contact 32 from shifting. At the same time, when the isolating switch 20 is open, the current will pass through the gap in the air, causing the air to ionize and form an electric arc. At this time, the extension part 43 will form an electric arc. The second limiting plate 522 can separate the extension part 43 from the cavity around the extension part 43 to prevent the electric arc from damaging other devices on the support base 31.

[0095] Continue to refer to Figure 14 and Figure 15 In the above embodiment, the limiting member 52 is provided with a third groove 63, and the contact portion 41 is disposed in the third groove 63. The third groove 63 is used to limit the movement of the stationary contact 32 along a first direction, which is perpendicular to the connecting member 34. Figure 8 The insertion direction (as shown).

[0096] The contact portion 41 is disposed in the third groove 63. The third groove 63 can restrict the position of the contact portion 41 and limit the movement of the contact portion 41 along the insertion direction perpendicular to the connector 34, thereby preventing the stationary contact 32 from shifting and improving the stability of the stationary contact 32.

[0097] Continue to refer to Figure 14 and Figure 15 In the above embodiment, the groove wall of the third groove 63 and the first limiting plate 521 form a receiving cavity 53, which is used to receive the connecting member 34. Figure 8 (As shown).

[0098] Since the connector 34 needs to be inserted into the connecting part 42, the connecting part 42 abuts against the limiting member 52, and the limiting member 52 will affect the connector 34 from passing through the mounting hole 421. The groove wall of the third groove 63 and the first limiting plate 521 form a receiving cavity 53, which can be used to receive the connector 34, so that the connector 34 can pass through the mounting hole 421 and be fixed with the stationary contact 32.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features therein; and these 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 application.

Claims

1. A disconnecting switch, characterized in that, include: Support base; A stationary contact and a moving contact, wherein the stationary contact is fixedly connected to the support base, and the moving contact is rotatably connected to the support base; The stationary contact includes a contact portion, a connecting portion, and an extension portion. The contact portion is connected to the connecting portion and is used to contact the moving contact. The connecting portion has a mounting hole for mounting a connector for connecting to a wire. The extension portion is connected to the end of the connecting portion away from the contact portion, and the extension portion is bent relative to the connecting portion. The support base has a limiting cavity, and the extension portion is disposed within the limiting cavity.

2. The disconnecting switch according to claim 1, characterized in that, The connecting portion includes a first surface and a second surface opposite to each other, and the first surface and the second surface are arranged sequentially from the insertion direction of the connector; The extension bends toward the side closer to the second surface.

3. The disconnecting switch according to claim 1 or 2, characterized in that, The contact portion, the connecting portion, and the extension portion are an integral structural component.

4. The disconnecting switch according to any one of claims 1-3, characterized in that, The support base is provided with a first groove, and at least a portion of the connecting part is disposed in the first groove. The first groove is used to limit the movement of the stationary contact along a first direction, which is perpendicular to the insertion direction of the connector.

5. The disconnecting switch according to any one of claims 1-4, characterized in that, The support base is provided with a second groove, and the contact portion is disposed in the second groove. The second groove is used to limit the movement of the stationary contact along a second direction, which is parallel to the insertion direction of the connector.

6. The disconnecting switch according to any one of claims 1-5, characterized in that, The limiting cavity includes a limiting groove formed on the support seat.

7. The disconnecting switch according to any one of claims 1-5, characterized in that, The support base includes a side plate, and a limiting member is also provided on the support base. The limiting member is located on the side of the stationary contact away from the side plate, and the limiting member and the side plate form the limiting cavity.

8. The disconnecting switch according to claim 7, characterized in that, The limiting member includes a first limiting plate and a second limiting plate, and the extension portion is located between the side plate and the first limiting plate, and the extension portion abuts against the side plate and the first limiting plate; The second limiting plate is disposed on the side of the extension portion away from the connecting portion, and the extension portion abuts against the second limiting plate; The first limiting plate, the second limiting plate, and the side plate form the limiting cavity.

9. The disconnecting switch according to claim 8, characterized in that, The limiting member is provided with a third groove, and the contact portion is disposed in the third groove. The third groove is used to limit the movement of the stationary contact along the first direction, which is perpendicular to the insertion direction of the connector.

10. The disconnecting switch according to claim 9, characterized in that, The groove wall of the third groove and the first limiting plate form a receiving cavity, which is used to receive the connector.

11. A power conversion device, characterized in that, It includes an inverter circuit and a disconnecting switch as described in any one of claims 1-10, wherein the connection portion of the disconnecting switch is used to connect to a photovoltaic panel or to the inverter circuit via the connector.

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