Isolation switch and electrical equipment

Abstract

The invention discloses an isolating switch and electrical equipment, and relates to the technical field of electrics. The isolating switch comprises a shell, a vacuum circuit breaker, an air circuit breaker, an operating mechanism and a rotating shaft. The vacuum circuit breaker and the air circuit breaker are arranged in parallel, the operating mechanism is connected with the rotating shaft, the rotating shaft is simultaneously connected with the vacuum circuit breaker and the air circuit breaker, and the operating mechanism is used for driving the vacuum circuit breaker and the air circuit breaker to open and close through the rotating shaft; the vacuum circuit breaker comprises a first moving contact and a first static contact, the air circuit breaker comprises a second moving contact and a second static contact, and contact between the first moving contact and the first static contact is prior to contact between the second moving contact and the second static contact during closing. And during opening, the first moving contact is separated from the first static contact, and then the second moving contact is separated from the second static contact. According to the disconnecting switch provided by the invention, the low temperature rise can be reduced under the condition that the high-voltage breaking capacity is ensured, the arc extinguishing effect and the conduction effect are ensured, fire accidents are avoided, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more specifically, to a disconnecting switch and electrical equipment. Background Technology

[0002] The function of a disconnecting switch is to control the on / off state of the load in a circuit, ensuring the safe operation of electrical appliances. Modern disconnecting switches, to withstand larger DC voltages, generally employ vacuum circuit breakers, allowing the moving and stationary contacts to break within a vacuum environment, enhancing arc extinguishing. However, in modern vacuum circuit breakers, the contact surfaces of the moving and stationary contacts are always in a vacuum, resulting in poor heat dissipation. If the vacuum circuit breaker is in a closed-circuit state for extended periods, its temperature rise is significant, directly affecting conductivity and increasing the risk of fire and accidents, thus compromising safety.

[0003] Therefore, there is an urgent need for electrical equipment products with good breaking capacity, good arc extinguishing effect, low temperature rise, and good safety. Summary of the Invention

[0004] The purpose of this application is to provide a disconnecting switch and electrical equipment that can reduce temperature rise while ensuring high voltage breaking capacity, guarantee arc extinguishing and conduction effects, prevent fire accidents, and improve safety.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a disconnecting switch, including a housing and a vacuum circuit breaker, an air circuit breaker, an operating mechanism, and a rotating shaft disposed within the housing. The vacuum circuit breaker and the air circuit breaker are arranged in parallel. The operating mechanism is connected to the rotating shaft, and the rotating shaft is simultaneously connected to both the vacuum circuit breaker and the air circuit breaker. The operating mechanism is used to drive the vacuum circuit breaker and the air circuit breaker to open and close via the rotating shaft. A vacuum circuit breaker includes a first moving contact and a first stationary contact, while an air circuit breaker includes a second moving contact and a second stationary contact. When closing, the first moving contact contacts the first stationary contact before the second moving contact contacts the second stationary contact. When opening, the first moving contact separates from the first stationary contact after the second moving contact separates from the second stationary contact.

[0006] As one possible implementation, the time difference between the contact between the first moving contact and the first stationary contact during closing and the contact between the second moving contact and the second stationary contact is 1ms-10ms. And / or, the time difference between the separation of the second moving contact and the second stationary contact during circuit breaking and the separation of the first moving contact and the first stationary contact is 1ms-10ms.

[0007] As one possible implementation, the circuit resistance of a vacuum circuit breaker is greater than that of an air circuit breaker, and the circuit current of a vacuum circuit breaker is less than that of an air circuit breaker.

[0008] As one possible implementation, the second moving contact includes a plurality of moving contact pieces arranged in parallel and spaced apart. The plurality of moving contact pieces are arranged in parallel and are used to simultaneously open and close with the second stationary contact.

[0009] As one possible implementation, the vacuum circuit breaker further includes a first transmission assembly and a vacuum bulb. The rotating shaft is connected to the first moving contact through the first transmission assembly. The first moving contact and the first stationary contact are disposed opposite to each other at both ends of the vacuum bulb, and both extend at least partially into the vacuum bulb. The first moving contact cooperates with the vacuum bulb.

[0010] In one possible implementation, the first transmission assembly includes a fixed sleeve, a transmission connecting rod, a rotating connecting rod, a mating block, and a linkage rod. The fixed sleeve is sleeved on the rotating shaft and rotatably connected to the transmission connecting rod. The housing is provided with a positioning shaft. The rotating connecting rod is mated with the positioning shaft and can rotate relative to the positioning shaft. One end of the rotating connecting rod is rotatably connected to the transmission connecting rod, and the other end is rotatably connected to the mating block. The mating block is connected to the linkage rod and slidably mated with the housing. The linkage rod is connected to the first moving contact.

[0011] As one possible implementation, the air circuit breaker also includes a second transmission assembly and an arc-extinguishing assembly. The rotating shaft is connected to the second moving contact through the second transmission assembly, and both the second moving contact and the second stationary contact are disposed between the arc-extinguishing assembly and the second transmission assembly.

[0012] In one possible implementation, the second transmission assembly includes a cantilever and a support. The cantilever is sleeved on the rotating shaft and rotatably connected to the support. The housing is provided with a limit shaft. The support cooperates with the limit shaft and can rotate relative to the limit shaft. The second moving contact is mounted on the support.

[0013] As one possible implementation, the vacuum circuit breaker further includes a first terminal block and a second terminal block, wherein the first terminal block is connected to the first moving contact and the second terminal block is connected to the first stationary contact; The air circuit breaker also includes a third terminal block and a fourth terminal block. The third terminal block is connected to the second moving contact, and the fourth terminal block is connected to the second stationary contact. The first terminal block is connected to the third terminal block via the first connecting block, and the second terminal block is connected to the fourth terminal block via the second connecting block.

[0014] A second aspect of this application provides an electrical device including the aforementioned disconnecting switch. This electrical device can reduce temperature rise while ensuring high-voltage breaking capacity, guaranteeing arc extinguishing and conduction effects, preventing fires and accidents, and improving safety.

[0015] The beneficial effects of the embodiments of this application include: The disconnecting switch includes a housing and a vacuum circuit breaker, an air circuit breaker, an operating mechanism, and a rotating shaft disposed within the housing. The vacuum circuit breaker and the air circuit breaker are connected in parallel. The operating mechanism is connected to the rotating shaft, and the rotating shaft is connected to both the vacuum circuit breaker and the air circuit breaker. The operating mechanism is used to drive the vacuum circuit breaker and the air circuit breaker to open and close via the rotating shaft. The vacuum circuit breaker includes a first moving contact and a first stationary contact, and the air circuit breaker includes a second moving contact and a second stationary contact. When closing, the contact between the first moving contact and the first stationary contact precedes the contact between the second moving contact and the second stationary contact. When opening, the separation of the first moving contact and the first stationary contact occurs after the separation of the second moving contact and the second stationary contact. The disconnecting switch provided in this application, through a vacuum circuit breaker that closes first and then opens, compared to an air circuit breaker, and a rotating shaft and operating mechanism connected to both the vacuum circuit breaker and the air circuit breaker, enables the first moving contact to contact the first stationary contact first, followed by the second moving contact, during closing; and the second moving contact to separate from the second stationary contact first, followed by the first moving contact, during opening. This achieves the function of the first moving contact closing first and then opening compared to the second moving contact. In this way, on the one hand, most of the arc energy generated during the closing and opening process is located within the vacuum circuit breaker, and the arc-extinguishing effect of the vacuum environment is good, ensuring high-voltage breaking capacity. On the other hand, during long-term closing, part of the current is conducted through the vacuum circuit breaker, and another part of the current is conducted through the air circuit breaker, achieving a current shunting function. While ensuring the conduction effect, it effectively reduces the current passing through the vacuum circuit breaker, thereby reducing its temperature rise, preventing fire accidents, and improving safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the disconnecting switch provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the disconnecting switch provided in the embodiment of the present invention, showing the connection between the operating mechanism and the vacuum circuit breaker and the air circuit breaker via a rotating shaft; Figure 3 A circuit diagram showing the parallel connection of a vacuum circuit breaker and an air circuit breaker in a disconnecting switch provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the air circuit breaker in the disconnecting switch provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the vacuum circuit breaker in the disconnecting switch provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of the first moving contact and the first stationary contact of the vacuum circuit breaker in the disconnecting switch provided in an embodiment of the present invention when the circuit is closed; Figure 7 This is a schematic diagram of the parallel connection of a vacuum circuit breaker and an air circuit breaker in a disconnecting switch provided in an embodiment of the present invention; Figure 8 An isometric view of the flexible connector of the vacuum circuit breaker in the disconnecting switch provided in an embodiment of the present invention, connecting the clamping head and the first terminal block; Figure 9 A front view of the flexible connector of the vacuum circuit breaker in the disconnecting switch provided in the embodiment of the present invention, connected between the clamping head and the first terminal block.

[0018] Icons: 100-Disconnecting switch; 110-Housing; 111-Positioning shaft; 112-Limiting shaft; 120-Vacuum circuit breaker; 121-First moving contact; 122-First stationary contact; 123-First transmission assembly; 1231-Fixed sleeve; 1232-Transmission link; 1233-Rotating link; 1234-Matching block; 1235-Linkage rod; 124-Vacuum bulb; 125-First terminal block; 1251-First protrusion; 1252-Limiting port; 126-Second terminal block; 1261-Second protrusion; 127-Flexible connector; 127 1-Connecting beam; 1272-First straight segment; 1273-Arc segment; 1274-Second straight segment; 128-Clamping head; 130-Air circuit breaker; 131-Second moving contact; 1311-Moving contact piece; 132-Second stationary contact; 133-Second transmission assembly; 1331-Cantilever; 1332-Support member; 134-Arc extinguishing assembly; 135-Third terminal block; 136-Fourth terminal block; 140-Operating mechanism; 141-Operating part; 142-Transmission part; 150-Rotating shaft; 160-First connecting row; 170-Second connecting row. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels 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.

[0022] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention 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 the invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" 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 invention based on the specific circumstances.

[0024] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0025] Please refer to the reference. Figures 1 to 4 This invention provides a disconnecting switch 100 for controlling the on / off state of a load in a circuit. It can reduce temperature rise while ensuring high-voltage breaking capacity, guaranteeing arc extinguishing and conduction effects, preventing fires and accidents, and improving safety.

[0026] The disconnecting switch 100 includes a housing 110 and a vacuum circuit breaker 120, an air circuit breaker 130, an operating mechanism 140, and a rotating shaft 150 disposed within the housing 110. The vacuum circuit breaker 120 and the air circuit breaker 130 are connected in parallel, and both the vacuum circuit breaker 120 and the air circuit breaker 130 can conduct current when the disconnecting switch 100 is in operation. The operating mechanism 140 is connected to the rotating shaft 150, which is also connected to both the vacuum circuit breaker 120 and the air circuit breaker 130. The operating mechanism 140 is used to drive the vacuum circuit breaker 120 and the air circuit breaker 130 to open and close via the rotating shaft 150. The vacuum circuit breaker 120 includes a first moving contact 121 and a first stationary contact 122, and the air circuit breaker 130 includes a second moving contact 131 and a second stationary contact 132. When closing, the contact between the first moving contact 121 and the first stationary contact 122 precedes the contact between the second moving contact 131 and the second stationary contact 132. When opening, the separation of the first moving contact 121 and the first stationary contact 122 follows the separation of the second moving contact 131 and the second stationary contact 132.

[0027] The disconnecting switch 100 provided in this application, through a vacuum circuit breaker 120 that closes first and then opens compared to an air circuit breaker, and a rotating shaft 150 and an operating mechanism 140 connected to both the vacuum circuit breaker 120 and the air circuit breaker 130, enables the first moving contact 121 to contact the first stationary contact 122 first when closing, and the second moving contact 131 to contact the second stationary contact 132 later; when opening, the second moving contact 131 to separate from the second stationary contact 132 first, and the first moving contact 121 to separate from the first stationary contact 122 later, thereby achieving the first moving contact 121 being more contacted than the first stationary contact 122. The second moving contact 131 has a first-close-then-open function. On the one hand, most of the arc energy generated during the opening and closing process is located in the vacuum circuit breaker 120, and the arc extinguishing effect of the vacuum environment is good, ensuring high-voltage breaking capacity. On the other hand, during the long-term closing process, part of the current is conducted through the vacuum circuit breaker 120, and the other part of the current is conducted through the air circuit breaker 130, realizing the current diversion function. While ensuring the conduction effect, it effectively reduces the current passing through the vacuum circuit breaker 120, thereby reducing its temperature rise, avoiding fire accidents, and improving safety.

[0028] As one possible implementation, the time difference between the contact between the first moving contact 121 and the first stationary contact 122 and the contact between the second moving contact 131 and the second stationary contact 132 during closing is 1ms-10ms. That is, when closing, the first moving contact 121 and the first stationary contact 122 contact first, and then the second moving contact 131 and the second stationary contact 132 contact 1ms-10ms later. The reasonable contact time difference range can avoid affecting the current conduction effect of the air circuit breaker 130 while ensuring that most of the arc energy is within the vacuum circuit breaker 120. Specifically, since the first moving contact 121 and the first stationary contact 122 make contact first when the circuit is closed, the current flows through the path formed by the first moving contact 121 and the first stationary contact 122. Most of the arc energy generated during the closing process is located between the first moving contact 121 and the first stationary contact 122, that is, within the vacuum circuit breaker 120. The vacuum circuit breaker 120 can extinguish the arc through the vacuum environment, ensuring the arc extinguishing effect.

[0029] In this embodiment, the time difference between the contact between the first moving contact 121 and the first stationary contact 122 and the contact between the second moving contact 131 and the second stationary contact 132 when the circuit is closed is 5ms. However, it is not limited to this. In other embodiments, the time difference between the contact between the first moving contact 121 and the first stationary contact 122 and the contact between the second moving contact 131 and the second stationary contact 132 when the circuit is closed can be 1ms or 10ms. The magnitude of the time difference between the contact between the first moving contact 121 and the first stationary contact 122 and the contact between the second moving contact 131 and the second stationary contact 132 when the circuit is closed is not specifically limited.

[0030] As one possible implementation, the time difference between the separation of the second moving contact 131 and the second stationary contact 132 and the separation of the first moving contact 121 and the first stationary contact 122 during opening is 1ms-10ms. That is, during opening, the second moving contact 131 and the second stationary contact 132 separate first, and then the first moving contact 121 and the first stationary contact 122 separate 1ms-10ms later. This reasonable separation time difference range ensures that most of the arc energy is located within the vacuum circuit breaker 120, guaranteeing high-voltage breaking capacity. Specifically, since the first moving contact 121 and the first stationary contact 122 separate after opening, the current flows through the path formed by the first moving contact 121 and the first stationary contact 122. Most of the arc energy generated during the opening process is located between the first moving contact 121 and the first stationary contact 122, that is, within the vacuum circuit breaker 120. The vacuum circuit breaker 120 can extinguish the arc through the vacuum environment, ensuring the arc extinguishing effect.

[0031] In this embodiment, the time difference between the separation of the second moving contact 131 and the second stationary contact 132 and the separation of the first moving contact 121 and the first stationary contact 122 during opening is 5ms. However, it is not limited to this. In other embodiments, the time difference between the separation of the second moving contact 131 and the second stationary contact 132 and the separation of the first moving contact 121 and the first stationary contact 122 during opening can be 1ms or 10ms. The magnitude of the time difference between the separation of the second moving contact 131 and the second stationary contact 132 and the separation of the first moving contact 121 and the first stationary contact 122 during opening is not specifically limited.

[0032] As one possible implementation, the circuit resistance of the vacuum circuit breaker 120 is greater than that of the air circuit breaker 130, and the circuit current of the vacuum circuit breaker 120 is less than that of the air circuit breaker 130. Thus, during prolonged closing, a small portion of the current flows through the first moving contact 121 and the first stationary contact 122 in the vacuum circuit breaker 120, while the majority of the current flows through the second moving contact 131 and the second stationary contact 132 in the air circuit breaker 130. This results in a smaller temperature rise in the vacuum circuit breaker 120 and a larger temperature rise in the air circuit breaker 130. Furthermore, because the vacuum circuit breaker 120 has poor heat dissipation (due to its vacuum-sealed environment) while the air circuit breaker 130 has better heat dissipation (due to airflow carrying away heat), the temperatures of both the vacuum circuit breaker 120 and the air circuit breaker 130 remain at a low level, ensuring safety and reliability and preventing fire accidents.

[0033] In one possible implementation, the second moving contact 131 includes a plurality of parallel-spaced moving contact pieces 1311 connected in parallel. These moving contact pieces 1311 are used to simultaneously open and close the circuit with the second stationary contact 132. When closing, because the multiple moving contact pieces 1311 are connected in parallel, the path resistance formed by the multiple moving contact pieces 1311 and the second stationary contact 132 can be effectively reduced, thereby reducing the path resistance of the air circuit breaker 130 and increasing the path current of the air circuit breaker 130.

[0034] In this embodiment, the resistance of the multiple moving contacts 1311 is the same, and the number of moving contacts 1311 is ten, but it is not limited to this. In other embodiments, the resistance of the multiple moving contacts 1311 may be different, and the number of moving contacts 1311 may be five or twenty. There is no specific limitation on the resistance of a single moving contact 1311 or the number of moving contacts 1311.

[0035] In this embodiment, the circuit resistance of the entire air circuit breaker 130 is reduced and the circuit current of the air circuit breaker 130 is increased by connecting multiple moving contacts 1311 in parallel. However, this is not the only option. In other embodiments, the circuit resistance of the air circuit breaker 130 can also be reduced and the circuit current of the air circuit breaker 130 can be increased by changing the material of the second moving contact 131 and the second stationary contact 132 (so that the resistance of the second moving contact 131 and the second stationary contact 132 is less than the resistance of the first moving contact 121 and the first stationary contact 122).

[0036] The operating mechanism 140 includes an operating section 141 and a transmission section 142 that are connected by a drive mechanism. The operating section 141 extends outside the housing 110 to facilitate manual or electric operation, and the transmission section 142 is connected to the rotating shaft 150. The operating section 141 is used to drive the transmission section 142 to move, thereby closing the vacuum circuit breaker 120 and the air circuit breaker 130 via the rotating shaft 150. The transmission section 142 is used to open the vacuum circuit breaker 120 and the air circuit breaker 130 via the rotating shaft 150.

[0037] Please refer to the reference. Figure 5 and Figure 6 As one possible implementation, the vacuum circuit breaker 120 further includes a first transmission assembly 123 and a vacuum bulb 124. The rotating shaft 150 is connected to the first moving contact 121 through the first transmission assembly 123. The first moving contact 121 and the first stationary contact 122 are disposed opposite to each other at both ends of the vacuum bulb 124, and both extend at least partially into the vacuum bulb 124. The first moving contact 121 is slidably engaged with the vacuum bulb 124, and the first stationary contact 122 is fixedly connected to the vacuum bulb 124. Specifically, during the closing process of the vacuum circuit breaker 120, the operating unit 141 is driven and sequentially drives the first moving contact 121 to slide relative to the vacuum bulb 124 through the transmission unit 142, the rotating shaft 150, and the first transmission assembly 123, so that the first moving contact 121 gradually approaches the first stationary contact 122 until the first moving contact 121 and the first stationary contact 122 make contact, completing the closing process. During this process, due to the high insulation strength of the vacuum environment inside the vacuum bulb 124, the first moving contact 121 and the first stationary contact 122 will not generate an electric arc or generate extremely fine electric arcs during the closing process. The arc extinguishing effect is strong, ensuring high safety. During the opening process of the vacuum circuit breaker 120, the transmission part 142 drives the first moving contact 121 to slide relative to the vacuum bulb 124 through the rotating shaft 150 and the first transmission assembly 123 in sequence, so that the first moving contact 121 separates from the first stationary contact 122 and gradually moves away from the first stationary contact 122, completing the opening. During this process, due to the high insulation strength of the vacuum environment inside the vacuum bulb 124, the first moving contact 121 and the first stationary contact 122 will not generate an arc or will generate an extremely small arc during the opening process, resulting in good arc extinguishing effect and strong safety.

[0038] The first transmission assembly 123 includes a fixed sleeve 1231, a transmission connecting rod 1232, a rotating connecting rod 1233, a mating block 1234, and a linkage rod 1235. The fixed sleeve 1231 is fixedly sleeved on the outside of the rotating shaft 150 and is rotatably connected to the transmission connecting rod 1232. The rotating shaft 150 can drive the fixed sleeve 1231 to rotate, thereby driving the transmission connecting rod 1232 to move. The housing 110 is provided with a positioning shaft 111. The rotating connecting rod 1233 cooperates with the positioning shaft 111. The rotating connecting rod 1233 can rotate relative to the positioning shaft 111, and the positioning shaft 111 can limit the rotation of the rotating connecting rod 1233. One end of the rotating connecting rod 1233 is rotatably connected to the transmission connecting rod 1232, and the other end is rotatably connected to the mating block 1234. The mating block 1234 is connected to the linkage rod 1235 and is slidably engaged with the housing 110. The linkage rod 1235 is connected to the first moving contact 121, and the sliding direction of the mating block 1234 is the same as the axial direction of the linkage rod 1235. Specifically, the transmission unit 142 can drive the rotating shaft 150 to rotate, thereby driving the fixed sleeve 1231 to rotate, which in turn drives the rotating connecting rod 1233 to rotate relative to the positioning shaft 111, causing the mating block 1234 to slide relative to the housing 110. In turn, the linkage rod 1235 drives the first moving contact 121 to slide relative to the vacuum bulb 124, thereby realizing the opening and closing function.

[0039] Please continue to refer to Figure 4 As one possible implementation, the air circuit breaker 130 further includes a second transmission assembly 133 and an arc-extinguishing assembly 134. The rotating shaft 150 is connected to the second moving contact 131 via the second transmission assembly 133. Both the second moving contact 131 and the second stationary contact 132 are located on the arc-extinguishing side of the arc-extinguishing assembly 134, i.e., both the second moving contact 131 and the second stationary contact 132 are located between the arc-extinguishing assembly 134 and the second transmission assembly 133. Specifically, during the closing process of the air circuit breaker 130, the operating part 141 is driven and sequentially drives the second moving contact 131 to move via the transmission part 142, the rotating shaft 150, and the second transmission assembly 133, so that the second moving contact 131 gradually approaches the second stationary contact 132 until the second moving contact 131 and the second stationary contact 132 contact, completing the closing. During this process, a small arc may still occur between the second moving contact 131 and the second stationary contact 132, which can be easily extinguished using the arc-extinguishing assembly 134. Partial arc extinguishing ensures high safety. During the opening process of the air circuit breaker 130, the transmission unit 142 drives the second moving contact 131 to move sequentially through the rotating shaft 150 and the second transmission assembly 133, so that the second moving contact 131 separates from the second stationary contact 132 and gradually moves away from the first stationary contact 122, thus completing the opening. During this process, a small arc may still appear between the second moving contact 131 and the second stationary contact 132. The arc extinguishing assembly 134 can easily extinguish this part of the arc, ensuring high safety.

[0040] The second transmission assembly 133 includes a cantilever 1331 and a support member 1332. The cantilever 1331 is fixedly sleeved outside the rotating shaft 150 and rotatably connected to the support member 1332. The rotating shaft 150 can drive the cantilever 1331 to rotate, thereby driving the support member 1332 to move. The housing 110 is provided with a limit shaft 112. The support member 1332 cooperates with the limit shaft 112. The second moving contact 131 is mounted on the support member 1332. The support member 1332 can rotate relative to the limit shaft 112, and the limit shaft 112 can limit the movement of the support member 1332. Specifically, multiple moving contact pieces 1311 of the second moving contact 131 are fixedly mounted on the support member 1332. The transmission part 142 can drive the rotating shaft 150 to rotate, thereby driving the cantilever 1331 to rotate, thereby driving the support member 1332 to rotate relative to the limit shaft 112, and further driving the multiple moving contact pieces 1311 to move, realizing the opening and closing function.

[0041] Please refer to Figure 7 As one possible implementation, the vacuum circuit breaker 120 further includes a first terminal block 125 and a second terminal block 126. The first terminal block 125 is connected to the first moving contact 121, and the second terminal block 126 is connected to the first stationary contact 122. The air circuit breaker 130 further includes a third terminal block 135 and a fourth terminal block 136. The third terminal block 135 is connected to the second moving contact 131, and the fourth terminal block 136 is connected to the second stationary contact 132. The first terminal block 125 is connected to the third terminal block 135 via a first connecting block 160, and the second terminal block 126 is connected to the fourth terminal block 136 via a second connecting block 170, thereby realizing the parallel operation of the vacuum circuit breaker 120 and the air circuit breaker 130.

[0042] Please refer to the reference. Figure 8 and Figure 9 As one possible implementation, the vacuum circuit breaker 120 also includes a flexible connector 127. The first terminal block 125 is connected to the first moving contact 121 via the flexible connector 127 to realize the wiring function of the first moving contact 121. The flexible connector 127 is used to deform when the first moving contact 121 slides, to ensure the stability of the connection between the first moving contact 121 and the first terminal block 125 during the opening and closing process. The second terminal block 126 is connected to the first stationary contact 122 to realize the wiring function of the first stationary contact 122.

[0043] As one possible implementation, the vacuum circuit breaker 120 also includes a clamping head 128. One end of the flexible connector 127 is connected to the first terminal block 125, and the other end is connected to the clamping head 128. The clamping head 128 clamps the first moving contact 121 to achieve a quick-release function, facilitating the rapid installation and removal of the first moving contact 121 and the flexible connector 127. Specifically, one end of the flexible connector 127 is welded to the first terminal block 125, and the other end is welded to the clamping head 128 to improve connection strength and ensure conduction effect.

[0044] The flexible connector 127 includes a connecting beam 1271. The connecting beam 1271 is U-shaped and includes a first straight segment 1272, an arc segment 1273, and a second straight segment 1274 connected in sequence. The first straight segment 1272 is welded to the first terminal block 125, and the second straight segment 1274 is welded to the clamping head 128. The arc segment 1273 can deform during the sliding of the first moving contact 121 relative to the vacuum bulb 124. Specifically, the first terminal block 125 and the second terminal block 126 are both fixedly installed in the housing 110, that is, the positions of the first terminal block 125 and the second terminal block 126 do not change. During the opening and closing process, the first moving contact 121 slides relative to the vacuum bulb 124 to drive the clamping head 128 to move. Since the position of the first terminal block 125 does not change, and the connecting beam 1271 connects the clamping head 128 and the first terminal block 125, the connecting beam 1271 will deform along with the clamping head 128.

[0045] As one possible implementation, the connecting beam 1271 is made of copper, which has good electrical conductivity and plastic deformation capability, and can ensure the conduction effect while deforming with the first moving contact 121.

[0046] As one possible implementation, there are multiple connecting beams 1271, which are arranged in parallel and spaced apart. The multiple connecting beams 1271 work together to further enhance the conduction effect, ensure that the current in the circuit meets the requirements, and the multiple connecting beams 1271 deform simultaneously during the opening and closing process, which can effectively avoid fatigue fracture and extend the service life of the flexible connector 127.

[0047] In this embodiment, the number of connecting beams 1271 is three, but it is not limited to this. In other embodiments, the number of connecting beams 1271 can be two or five, and the number of connecting beams 1271 is not specifically limited.

[0048] In one possible implementation, the first terminal block 125 is provided with a first protrusion 1251, and a flexible connector 127 is connected between the first protrusion 1251 and the first moving contact 121 to realize the conduction function between the first moving contact 121 and the first protrusion 1251. Specifically, the first protrusion 1251 has a limiting port 1252, and the linkage rod 1235 is provided through the limiting port 1252 and slidably engaged with the limiting port 1252. The linkage rod 1235 can slide relative to the limiting port 1252, and the inner wall of the limiting port 1252 can guide and limit the linkage rod 1235 to ensure that the linkage rod 1235 can only slide along its axial direction, thereby improving the stability of the linkage rod 1235 during the sliding process. Furthermore, the linkage rod 1235 is made of insulating material and does not conduct electricity. The first moving contact 121 is connected to the first protrusion 1251 of the first terminal block 125 through the flexible connector 127.

[0049] In one possible implementation, the second terminal block 126 is provided with a second protrusion 1261, and a first stationary contact 122 is connected to the second protrusion 1261. Specifically, the first stationary contact 122 is welded to the second protrusion 1261 to improve the connection strength and ensure the conductivity.

[0050] As one possible implementation, there are multiple vacuum circuit breakers 120 and air circuit breakers 130, with each vacuum circuit breaker 120 and air circuit breaker 130 connected in parallel. That is, the disconnecting switch 100 includes a multi-phase circuit, and each phase circuit is connected or disconnected by a vacuum circuit breaker 120 and an air circuit breaker 130 connected in parallel.

[0051] In this embodiment, there are two vacuum circuit breakers 120 and two air circuit breakers 130, meaning that the disconnecting switch 100 includes a two-phase circuit. However, this is not the only embodiment. In other embodiments, there may be one vacuum circuit breaker 120 and one air circuit breaker 130, or there may be three air circuit breakers 130. The number of vacuum circuit breakers 120 and air circuit breakers 130 is not specifically limited.

[0052] This invention also provides an electrical device (not shown) including the aforementioned disconnector switch 100. Since the structure and beneficial effects of the disconnector switch 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0053] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A disconnecting switch, characterized in that, The device includes a housing (110) and a vacuum circuit breaker (120), an air circuit breaker (130), an operating mechanism (140), and a rotating shaft (150) disposed within the housing (110). The vacuum circuit breaker (120) and the air circuit breaker (130) are arranged in parallel. The operating mechanism (140) is connected to the rotating shaft (150), and the rotating shaft (150) is connected to both the vacuum circuit breaker (120) and the air circuit breaker (130). The operating mechanism (140) is used to drive the vacuum circuit breaker (120) and the air circuit breaker (130) to open and close via the rotating shaft (150). The vacuum circuit breaker (120) includes a first moving contact (121) and a first stationary contact (122), and the air circuit breaker (130) includes a second moving contact (131) and a second stationary contact (132). When closing, the first moving contact (121) contacts the first stationary contact (122) before the second moving contact (131) contacts the second stationary contact (132). When opening, the separation of the first moving contact (121) from the first stationary contact (122) follows the separation of the second moving contact (131) from the second stationary contact (132).

2. The disconnecting switch according to claim 1, characterized in that, The time difference between the contact between the first moving contact (121) and the first stationary contact (122) during closing and the contact between the second moving contact (131) and the second stationary contact (132) is 1ms-10ms. And / or, the time difference between the separation of the second moving contact (131) and the second stationary contact (132) during the opening of the circuit and the separation of the first moving contact (121) and the first stationary contact (122) is 1ms-10ms.

3. The disconnecting switch according to claim 1, characterized in that, The circuit resistance of the vacuum circuit breaker (120) is greater than that of the air circuit breaker (130), and the circuit current of the vacuum circuit breaker (120) is less than that of the air circuit breaker (130).

4. The disconnecting switch according to claim 3, characterized in that, The second moving contact (131) includes a plurality of moving contact pieces (1311) arranged in parallel and spaced apart. The plurality of moving contact pieces (1311) are arranged in parallel and are used to simultaneously open and close with the second stationary contact (132).

5. The disconnecting switch according to claim 1, characterized in that, The vacuum circuit breaker (120) further includes a first transmission assembly (123) and a vacuum bulb (124). The rotating shaft (150) is connected to the first moving contact (121) through the first transmission assembly (123). The first moving contact (121) and the first stationary contact (122) are disposed opposite to each other at both ends of the vacuum bulb (124) and both extend at least partially into the vacuum bulb (124). The first moving contact (121) cooperates with the vacuum bulb (124).

6. The disconnecting switch according to claim 5, characterized in that, The first transmission assembly (123) includes a fixed sleeve (1231), a transmission connecting rod (1232), a rotating connecting rod (1233), a mating block (1234), and a linkage rod (1235). The fixed sleeve (1231) is sleeved on the rotating shaft (150) and rotatably connected to the transmission connecting rod (1232). The housing (110) is provided with a positioning shaft (111). The rotating connecting rod (1233) is engaged with the positioning shaft (111). The rotating connecting rod (1233) can rotate relative to the positioning shaft (111). One end of the rotating connecting rod (1233) is rotatably connected to the transmission connecting rod (1232), and the other end is rotatably connected to the mating block (1234). The mating block (1234) is connected to the linkage rod (1235) and slidably engaged with the housing (110). The linkage rod (1235) is connected to the first moving contact (121).

7. The disconnecting switch according to any one of claims 1-6, characterized in that, The air circuit breaker (130) further includes a second transmission assembly (133) and an arc extinguishing assembly (134). The rotating shaft (150) is connected to the second moving contact (131) through the second transmission assembly (133). The second moving contact (131) and the second stationary contact (132) are both disposed between the arc extinguishing assembly (134) and the second transmission assembly (133).

8. The disconnecting switch according to claim 7, characterized in that, The second transmission assembly (133) includes a cantilever (1331) and a support (1332). The cantilever (1331) is sleeved on the rotating shaft (150) and rotatably connected to the support (1332). The housing (110) is provided with a limiting shaft (112). The support (1332) cooperates with the limiting shaft (112). The support (1332) can rotate relative to the limiting shaft (112). The second moving contact (131) is mounted on the support (1332).

9. The disconnecting switch according to any one of claims 1-6, characterized in that, The vacuum circuit breaker (120) further includes a first terminal block (125) and a second terminal block (126), wherein the first terminal block (125) is connected to the first moving contact (121) and the second terminal block (126) is connected to the first stationary contact (122); The air circuit breaker (130) further includes a third terminal block (135) and a fourth terminal block (136), the third terminal block (135) being connected to the second moving contact (131) and the fourth terminal block (136) being connected to the second stationary contact (132); The first terminal block (125) is connected to the third terminal block (135) via the first connecting block (160), and the second terminal block (126) is connected to the fourth terminal block (136) via the second connecting block (170).

10. An electrical device, characterized in that, Including the disconnecting switch as described in any one of claims 1-9.

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