Load switch

Abstract

The present invention belongs to the technical field of switches, and discloses a load switch, including a moving contact, a stationary contact, a vacuum arc chamber, a connecting assembly and an electromagnetic assembly. One end of the electromagnetic assembly is fixedly connected to the moving end of the vacuum arc chamber. In the process of switching the load switch from closing to opening, the moving contact rotates along the first rotation direction and separates from the stationary contact, and the moving contact, the vacuum arc chamber, the connecting assembly and the electromagnetic assembly can form a first circuit, and the current is transferred to the first circuit. The electromagnetic assembly can generate an electromagnetic induction force due to the action of the current, and the electromagnetic assembly can drive the moving end of the vacuum arc chamber to move under the action of the electromagnetic induction force, so as to extinguish the vacuum arc chamber. The load switch adopts the principle of electromagnetic induction to realize the arc extinguishing of the vacuum arc chamber, and cleverly uses the current to realize that the electromagnetic assembly drives the moving end of the vacuum arc chamber to move, thereby realizing the breaking of the current, and has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of switches, and in particular to a load switch. Background Art

[0002] A load switch is a switch capable of breaking the rated load current. In traditional SF6 (sulfur hexafluoride) gas insulated load switch cabinets, since SF6 gas itself has excellent breaking performance, the arc extinguishing grid is used to extinguish the arc between the contacts during the breaking process and break the rated load current.

[0003] However, in environmentally friendly gas-insulated charging cabinets, dry air is usually used as the insulating medium, and dry air itself does not have a breaking capability, so it is impossible to break the load current.

[0004] In order to solve the above problems, in the prior art, a transmission mechanism is generally connected to the moving end of the vacuum interrupter. When the load switch is in the open state, the moving contact can drive the transmission mechanism to move in the process of rotating away from the static contact, thereby realizing that the transmission mechanism drives the moving end of the vacuum interrupter to move to realize the interruption of the load current of the load switch. This structure realizes the arc extinguishing operation of the vacuum interrupter through a mechanical transmission structure, and the structure is relatively complex. Summary of the invention

[0005] The object of the present invention is to provide a load switch with simple structure and low cost.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A load switch, comprising a moving contact, a stationary contact, a vacuum interrupter, a connecting assembly and an electromagnetic assembly, wherein one end of the electromagnetic assembly is fixedly connected to the moving end of the vacuum interrupter, and the other end of the electromagnetic assembly is connected to the connecting assembly;

[0008] During the process of switching the load switch from the closed state to the open state, the moving contact rotates along the first rotation direction and separates from the static contact, the moving contact contacts the connecting component, and the moving contact, the connecting component, the electromagnetic component and the vacuum interrupter form a first circuit. Current flowing through the first circuit causes the electromagnetic component to generate electromagnetic induction force, and the electromagnetic induction force is used to drive the moving end of the vacuum interrupter to move to extinguish the arc.

[0009] As an optional solution, the electromagnetic assembly includes an electromagnetic coil and an iron core, one end of the iron core is connected to the moving end of the vacuum arc extinguishing chamber, and the electromagnetic coil is wrapped around the iron core.

[0010] As an optional solution, the connecting assembly includes a rotating member, the rotating member includes a conductive portion, an insulating portion, and a rotating portion connected to the conductive portion and the insulating portion, and the rotating member has a first position and a second position;

[0011] When the rotating member is in the first position, the moving contact rotates along the first rotation direction to contact the conductive part to form the first circuit, and drives the rotating part to rotate around the first rotation axis along the first rotation direction, so that the rotating member rotates and switches from the first position to the second position;

[0012] When the rotating member is in the second position, the moving contact rotates along the second rotation direction to contact the insulating portion, and drives the rotating portion to rotate around the first rotating shaft along the second rotation direction, so that the rotating member rotates and switches from the second position to the first position;

[0013] The first rotation direction and the second rotation direction are opposite.

[0014] As an optional solution, the connection assembly further includes a first wire and a conductive bar, a conductive voltage rod is provided at one end of the conductive part away from the rotating part, the conductive bar is connected to the electromagnetic assembly, the first wire connects the conductive voltage rod and the electromagnetic assembly, and the moving contact rotates along the first rotation direction to contact the conductive voltage rod to form the first circuit;

[0015] An insulating pressure rod is disposed at one end of the insulating portion away from the rotating portion, and the moving contact can contact the insulating pressure rod by rotating along the second rotation direction.

[0016] As an optional solution, when the rotating member is in the first position, the distance from the insulating pressure rod to the axis of the moving contact is greater than the rotation radius of the moving contact, and the distance from the conductive pressure rod to the axis of the moving contact is less than the rotation radius of the moving contact;

[0017] When the rotating member is in the second position, the distance from the insulating pressure rod to the axis of the moving contact is smaller than the rotation radius of the moving contact, and the distance from the conductive pressure rod to the axis of the moving contact is larger than the rotation radius of the moving contact.

[0018] As an option, it also includes:

[0019] case;

[0020] The elastic component has a first hinge part and a second hinge part at both ends, wherein one of the first hinge part and the second hinge part is hinged to the housing, and the other is hinged to the rotating part;

[0021] During the process of switching the load switch from the open state to the closed state, the rotating member rotates around the second rotation direction and compresses the elastic component, and when the elastic component releases the compression energy and recovers the deformation, the rotating member is kept in the first position;

[0022] During the switching of the load switch from the closed state to the open state, the rotating member rotates around the first rotation direction and compresses the elastic component, and when the elastic component releases the compression energy and recovers the deformation, the rotating member maintains the second position.

[0023] As an optional solution, the elastic component includes a sleeve, a sliding rod and a spring. The sliding rod is slidably connected to the sleeve, a first hinge portion is provided at one end of the sleeve away from the sliding rod, and a second hinge portion is provided at one end of the sliding rod away from the sleeve. The spring is sleeved on the sleeve and the sliding rod and elastically abuts between the first hinge portion and the second hinge portion.

[0024] As an optional solution, a first avoidance hole is provided at a position of the conductive bar corresponding to the electromagnetic component, and the first avoidance hole is used to avoid the electromagnetic component to prevent the electromagnetic component from interfering with the conductive bar when moving.

[0025] As an optional solution, it further includes a shell, the conductive bar and the electromagnetic assembly are both arranged in the shell, and the shell is provided with a second avoidance hole concentric with the first avoidance hole.

[0026] As an optional solution, a static contact seat is further included. When the load switch is in a closed state, the moving contact contacts the static contact, and the static contact, the moving contact and the static contact seat form a second circuit. The second circuit is connected in parallel with the first circuit.

[0027] Beneficial effects of the present invention:

[0028] The present invention provides a load switch, which generates electromagnetic induction force through the electromagnetic component through the current, and drives the moving end of the vacuum interrupter to move under the action of the electromagnetic induction force, so as to extinguish the arc in the vacuum interrupter, thereby realizing the interruption of the current. The load switch uses the electromagnetic induction principle to extinguish the arc in the vacuum interrupter, and cleverly uses the current to realize the electromagnetic component driving the moving end of the vacuum interrupter to extinguish the arc, and has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a first structural schematic diagram of a load switch provided in an embodiment of the present invention;

[0030] Figure 2 is a second structural schematic diagram of a load switch provided in an embodiment of the present invention;

[0031] Figure 3 yes Figure 2 A magnified view of the structure at center A;

[0032] Figure 4-Figure 8 It is a schematic diagram of the process of switching from closing to opening of the load switch provided by the embodiment of the present invention;

[0033] Figure 9-11 It is a schematic diagram of the process of switching the load switch from opening to closing provided by an embodiment of the present invention.

[0034] In the figure:

[0035] 1. Moving contact; 2. Static contact; 3. Vacuum interrupter; 4. Electromagnetic assembly; 41. Electromagnetic coil; 42. Iron core; 5. Connecting assembly; 51. Rotating member; 511. Conductive part; 5111. Conductive pressure rod; 512. Insulating part; 5121. Insulating pressure rod; 513. Rotating part; 514. Cantilever shaft; 52. Conductive bar; 521. First avoidance hole; 53. First conductor; 6. Main busbar; 7. Static contact seat; 8. First rotating shaft; 9. Elastic assembly; 91. Bushing; 911. Limiting plate; 912. Articulated ear; 92. Sliding rod; 93. Spring; 10. Second conductor; 20. Housing; 201. Second rotating shaft; 202. Second avoidance hole; 30. Grounding contact. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a load switch, which includes a moving contact 1, a stationary contact 2, a vacuum interrupter 3, a connecting assembly 5 and an electromagnetic assembly 4. Among them, one end of the electromagnetic assembly 4 is fixedly connected to the moving end of the vacuum interrupter 3, and the other end is connected to the connecting assembly 5. In the process of switching the load switch from the closed state to the open state, the moving contact 1 rotates along the first rotation direction and separates from the stationary contact 2, and the moving contact 1, the connecting assembly 5, the vacuum interrupter 3 and the electromagnetic assembly 4 can form a first circuit, and the current (the current is the load current provided to the load electrical appliance when the load switch is in the closed state) is transferred to the first circuit. The electromagnetic assembly 4 can generate electromagnetic induction force due to the action of the load current, and can drive the moving end of the vacuum interrupter 3 to move under the action of the electromagnetic induction force, so that the vacuum interrupter 3 extinguishes the arc, that is, the vacuum interrupter 3 extinguishes the arc generated during the opening process, and the load current is interrupted.

[0041] The load switch generates electromagnetic induction force through the load current to drive the moving end of the vacuum interrupter 3 to move under the action of the electromagnetic induction force, so as to extinguish the arc in the vacuum interrupter 3, thereby realizing the interruption of the load current. The load switch uses the electromagnetic induction principle to extinguish the arc in the vacuum interrupter 3, and ingeniously uses the load current to drive the moving end of the vacuum interrupter 3 to move and extinguish the arc by driving the electromagnetic component 4, which has a simple structure and low cost.

[0042] Specifically, the electromagnetic assembly 4 includes an electromagnetic coil 41 and an iron core 42. The electromagnetic coil 41 is wrapped around the iron core 42, and one end of the iron core 42 is fixedly connected to the moving end of the vacuum arc chamber 3. The electromagnetic coil 41 can generate electromagnetic induction force, and the electromagnetic induction force can drive the iron core 42 to drive the moving end of the vacuum arc chamber 3 to move.

[0043] The load switch also includes a main busbar 6 and a static contact seat 7. The moving contact 1 is rotatably connected to the static contact seat 7. When the load switch is in a closed state, the moving contact 1 contacts the static contact 2. The main busbar 6, the static contact 2, the moving contact 1 and the static contact seat 7 form a second circuit. The second circuit is connected in parallel with the first circuit. The second circuit is in a conducting state, and the first circuit is in a disconnected state. The load current flows through the second circuit, and the vacuum interrupter 3 resets the moving end due to the internal and external pressure difference.

[0044] During the process of switching the load switch from the closed state to the open state, the moving contact 1 rotates along the first rotation direction and separates from the static contact 2, and the main bus 6, the vacuum interrupter 3, the electromagnetic coil 41, the connecting assembly 5, the moving contact 1 and the static contact seat 7 form a first circuit.

[0045] In this embodiment, the load switch further includes a housing 20 , the main bus 6 is installed outside the housing 20 , and the vacuum interrupter 3 is installed inside the housing 20 and connected to the main bus 6 .

[0046] Optionally, the connecting assembly 5 includes a rotating member 51, which is rotatably connected to the housing 20 via a first rotating shaft 8. The rotating member 51 includes a conductive part 511, an insulating part 512, and a rotating part 513 connected to the conductive part 511 and the insulating part 512, and the rotating member 51 has a first position and a second position. When the load switch is in a closed state, the rotating member 51 is in the first position, so that in the process of switching the load switch from the closed state to the open state, the moving contact 1 rotates along the first rotation direction to contact the conductive part 511 of the rotating member 51 to form a first circuit, and in the process of rotating the moving contact 1 along the first rotation direction, it can drive the rotating member 51 to rotate and switch from the first position to the second position; when the load switch is in an open state, the rotating member 51 is in the second position, so that in the process of switching the load switch from the open state to the closed state, the moving contact 1 rotates along the second rotation direction to contact the insulating part 512 of the rotating member 51, and can drive the rotating member 51 to switch from the second position to the first position. By setting the rotating member 51, when the load switch is in the closed state, the rotating member 51 is located at the first position, so that the moving contact 1 contacts the conductive part 511 during the process of switching the load switch from the closed state to the open state, thereby realizing the conduction of the first circuit; when the load switch is in the open state, the rotating member 51 is located at the second position, and during the process of switching the load switch from the open state to the closed state, the moving contact 1 can avoid contact between the conductive part 511 and the insulating part 512, thereby avoiding the conduction of the first circuit.

[0047] The first rotation direction is opposite to the second rotation direction.

[0048] Specifically, Figure 2-Figure 3As shown, the connection assembly 5 also includes a first conductive wire 53 and a conductive bar 52. A conductive voltage rod 5111 is provided at one end of the conductive portion 511 of the rotating member 51 away from the rotating portion 513. The conductive bar 52 is connected to the electromagnetic coil 41. The conductive voltage rod 5111 is connected to the electromagnetic coil 41 through the first conductive wire 53. During the switching process of the load switch from the closed state to the open state, the moving contact 1 contacts the conductive voltage rod 5111 to realize the conduction of the first circuit, and the conductive voltage rod 5111 can also realize the rotation switching of the rotating member 51 from the first position to the second position.

[0049] Specifically, an insulating pressure rod 5121 is provided at one end of the insulating part of the rotating member 51 away from the rotating part 513. During the switching process of the load switch from the open state to the closed state, the moving contact 1 rotates along the second rotation direction to contact the insulating pressure rod 5121, and drives the rotating member 51 to rotate and switch from the second position to the first position.

[0050] Optionally, the rotating member 51 is set to be U-shaped, and two are provided, the conductive pressure rod 5111 and the insulating pressure rod 5121 are sandwiched between the two rotating members 51, and the first rotating shaft 8 is set in the housing 20. In order to facilitate the fixed support of the first wire 53, the middle part of the first wire 53 can be fixed on the first rotating shaft 8 to prevent the first wire 53 from moving too much during the rotation of the rotating member 51.

[0051] Optionally, the vacuum interrupter 3 is connected to the electromagnetic coil 41 via a second conductive wire 10 , so as to realize electrical connection between the vacuum interrupter 3 and the electromagnetic coil 41 .

[0052] In this embodiment, the first wire 53 and the second wire 10 are both soft wires.

[0053] Specifically, when the rotating member 51 is in the first position, the distance from the insulating pressure rod 5121 to the axis center of the moving contact 1 is greater than the rotation radius of the moving contact 1, and the distance from the conductive voltage rod 5111 to the axis center of the moving contact 1 is less than the rotation radius of the moving contact 1. This structural design can ensure that during the switching process of the load switch from the closed state to the open state, the moving contact 1 can directly contact the conductive voltage rod 5111 without contacting the insulating pressure rod 5121; when the rotating member 51 is in the second position, the distance from the insulating pressure rod 5121 to the axis center of the moving contact 1 is less than the rotation radius of the moving contact 1, and the distance from the conductive voltage rod 5111 to the axis center of the moving contact 1 is greater than the rotation radius of the moving contact 1. This structural design can ensure that during the switching process of the load switch from the open state to the closed state, the moving contact 1 can directly contact the insulating pressure rod 5121 without contacting the conductive voltage rod 5111.

[0054] In order to keep the rotating member 51 in the first position or the second position when the load switch is in the closed state or the open state, the load switch further includes an elastic component 9, under the action of the elastic component 9, the rotating member 51 can be kept in the first position or the second position. Specifically, the elastic component 9 is provided with a first hinge part and a second hinge part at both ends, one of the first hinge part and the second hinge part is hinged to the housing 20, and the other is hinged to the rotating part 513; in the process of switching the load switch from the open state to the closed state, the rotating member 51 rotates around the second rotation direction and compresses the elastic component 9, and when the elastic component 9 releases the compression energy to restore the deformation, the rotating member 51 is kept in the first position;

[0055] During the switching process of the load switch from the closed state to the open state, the rotating member 51 rotates around the first rotation direction and compresses the elastic component 9, and when the elastic component 9 releases the compression energy and recovers the deformation, the rotating member 51 is kept in the second position.

[0056] More specifically, the elastic component 9 includes a sleeve 91, a slide bar 92 and a spring 93. The slide bar 92 is slidably plugged with the sleeve 91. The end of the sleeve 91 away from the slide bar 92 is provided with a first hinge portion, and the end of the slide bar 92 away from the sleeve 91 is provided with a second hinge portion. The spring 93 is sleeved on the sleeve 91 and the slide bar 92 and elastically arranged between the sleeve 91 and the slide bar 92. During the process of switching the load switch from the closed state to the open state or from the open state to the closed state, the spring 93 is compressed and the slide bar 92 moves toward the sleeve 91. When the load switch is in the open state or the closed state, the spring 93 releases the compression energy to restore the deformation. Under the action of the spring 93, the slide bar 92 moves away from the sleeve 91, so that the rotating member 51 is in the first position or the second position.

[0057] In this embodiment, two groups of elastic components 9 are provided, and the two elastic components 9 are respectively connected to the two rotating members 51 correspondingly.

[0058] More specifically, the first hinged part and the second hinged part each include a limit plate 911 respectively arranged on the sleeve 91 and the slide rod 92 and a hinge ear 912 arranged on the limit plate 911, a second rotating shaft 201 is arranged in the shell 20, and the rotating member 51 is provided with a cantilever shaft 514. The spring 93 is sleeved on the sleeve 91 and the slide rod 92, and both ends are elastically abutted against the limit plates 911 of the first hinged part and the second hinged part, the hinge ears 912 of the first hinged part and the second hinged part are respectively hinged to the second rotating shaft 201 and the cantilever shaft 514, and the rotating member 51 rotates around the second rotating shaft 201.

[0059] Optionally, refer to Figure 1The conductive bar 52 is installed in the shell 20, and the end of the electromagnetic coil 41 away from the vacuum arc chamber 3 is connected to the conductive bar 52. The first wire 53 is connected to the conductive bar 52 and the conductive voltage rod 5111. This structure realizes the fixation of the electromagnetic coil 41 and the conductive connection between the conductive voltage rod 5111 and the electromagnetic coil 41.

[0060] Furthermore, in order to avoid interference between the iron core 42 and the conductive bar 52 , a first avoidance hole 521 is provided on the conductive bar 52 at a position corresponding to the other end of the iron core 42 , and the iron core 42 can pass through the first avoidance hole 521 during movement.

[0061] The housing 20 is provided with a second avoidance hole 202 which is concentric with the first avoidance hole 521 . When the iron core 42 moves, the second avoidance hole 202 is used to avoid the other end of the iron core 42 .

[0062] The load switch further includes a grounding contact 30 . When the load switch needs to be grounded, the moving contact 1 rotates along a first rotation direction until it contacts the grounding contact 30 .

[0063] It is understandable that if Figure 4-Figure 8 As shown, when the load switch is in the closed state, the second circuit is in the on state, the moving contact 1 is in contact with the static contact 2, and the first circuit is in the disconnected state. At this time, the load current is carried by the second circuit, and the moving end of the vacuum interrupter 3 is in the reset state due to the internal and external pressure difference. The spring 93 recovers its deformation and can make the rotating part 51 in the first position.

[0064] When the load switch needs to be opened, the load switch needs to be switched from the closed state to the open state by operating the external mechanism. During this process, the moving contact 1 rotates along the first rotation direction. When the moving contact 1 is about to be separated from the static contact 2, the moving contact 1 avoids the insulating pressure rod 5121 and contacts the conductive pressure rod 5111. The first circuit is turned on, and the load current flows through the second circuit and the first circuit respectively. At this time, the current flowing through the first circuit is small, and the electromagnetic induction force generated is small, which is not enough to make the iron core 42 drive the moving end to move. As the moving contact 1 continues to rotate, at the moment when the moving contact 1 is separated from the static contact 2, the load current is completely transferred to the first circuit. At this time, the current of the first circuit increases, so that the electromagnetic coil 41 generates enough electromagnetic induction force, and the electromagnetic induction force acts on the iron core 42 to move the iron core 42 and drive the moving end of the vacuum interrupter 3 to move, so that the vacuum interrupter 3 extinguishes the arc, and the load current is disconnected. After the load current is disconnected, the electromagnetic induction force also disappears. The vacuum interrupter 3 forms a self-closing force due to its own internal and external pressure difference to reset the moving end.

[0065] When the moving contact 1 is switched from the closed state to the open state, after the moving contact 1 rotates along the first rotation direction to contact the conductive voltage rod 5111, the rotating member 51 rotates along the second rotation direction with the first rotating shaft 8 as the center, and the spring 93 is compressed and stores energy under the action of rotation. When the moving contact 1 continues to rotate along the first rotation direction and separates from the conductive voltage rod 5111, the spring 93 releases the compressed energy to restore the deformation, and makes the rotating member 51 continue to rotate along the second rotation direction to the second position after separating from the moving contact 1, that is, the conductive voltage rod 5111 is lifted upward and the insulating pressure rod 5121 falls.

[0066] On the contrary, if Figure 9-11 As shown, when the load switch needs to be closed, during the process of the external mechanism operating the load switch to switch from the open state to the closed state, the moving contact 1 rotates along the second rotation direction. During this process, the moving contact 1 avoids the conductive voltage rod 5111 and contacts the insulating pressure rod 5121, and causes the rotating member 51 to rotate along the first rotation direction. The spring 93 is compressed and stores energy under the action of the rotation. When the moving contact 1 rotates along the second rotation direction and separates from the insulating pressure rod 5121, the spring 93 releases the compression energy to restore the deformation, and causes the rotating member 51 to continue to rotate along the first rotation direction to the first position after separating from the moving contact 1, that is, the insulating pressure rod 5121 is lifted upward and the conductive voltage rod 5111 falls.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Load switch, characterized in that: The invention comprises a moving contact (1), a stationary contact (2), a vacuum interrupter (3), a connecting assembly (5) and an electromagnetic assembly (4); the electromagnetic assembly (4) comprises an electromagnetic coil (41) and an iron core (42); one end of the iron core (42) is fixedly connected to the moving end of the vacuum interrupter (3); the electromagnetic coil (41) is wrapped around the iron core (42); the connecting assembly (5) comprises a rotating member (51), a conductive bar (52) and a first conductive wire (53); the rotating member (51) comprises a conductive portion (511), an insulating portion (512) and a rotating portion (513) connected to the conductive portion (511) and the insulating portion (512); the conductive bar (52) is connected to the electromagnetic coil (41); one end of the first conductive wire (53) is connected to the conductive portion (511); and the other end of the first conductive wire (53) is connected to the conductive bar (52); During the process of switching the load switch from the closed state to the open state, the moving contact (1) rotates along a first rotation direction and separates from the static contact (2), the moving contact (1) contacts the conductive part (511), the moving contact (1), the rotating part (51), the first conductor (53), the conductive bar (52), the electromagnetic coil (41) and the vacuum interrupter (3) form a first loop, and current flows through the first loop to cause the electromagnetic coil (41) to generate electromagnetic induction force, and the electromagnetic induction force is used to drive the iron core (42) to drive the moving end of the vacuum interrupter (3) to move to extinguish the arc; During the process of switching the load switch from the open state to the closed state, the moving contact (1) rotates along the second rotation direction to contact the insulating part (512); The first rotation direction and the second rotation direction are opposite.

2. The load switch according to claim 1, characterized in that: The rotating member (51) has a first position and a second position; When the rotating member (51) is in the first position, the moving contact (1) can rotate along the first rotation direction to contact the conductive part (511) to form the first circuit, and drive the rotating part (513) to rotate around the first rotation axis (8) along the first rotation direction, so that the rotating member (51) rotates and switches from the first position to the second position; When the rotating member (51) is in the second position, the moving contact (1) can rotate along the second rotation direction to contact the insulating portion (512), and drive the rotating portion (513) to rotate around the first rotating shaft (8) along the second rotation direction, so that the rotating member (51) is rotated and switched from the second position to the first position; The first rotation direction and the second rotation direction are opposite.

3. The load switch according to claim 2, characterized in that: A conductive voltage rod (5111) is provided at one end of the conductive part (511) away from the rotating part (513); one end of the first conductive wire (53) is connected to the conductive voltage rod (5111); and the movable contact (1) can contact the conductive voltage rod (5111) by rotating along the first rotation direction to form the first circuit; An insulating pressure rod (5121) is provided at one end of the insulating portion (512) away from the rotating portion (513), and the moving contact (1) can contact the insulating pressure rod (5121) when rotating along the second rotation direction.

4. The load switch according to claim 3, characterized in that: When the rotating member (51) is in the first position, the distance between the insulating pressure rod (5121) and the axis of the moving contact (1) is greater than the rotation radius of the moving contact (1), and the distance between the conductive pressure rod (5111) and the axis of the moving contact (1) is less than the rotation radius of the moving contact (1); When the rotating member (51) is in the second position, the distance from the insulating pressure rod (5121) to the axis of the moving contact (1) is smaller than the rotation radius of the moving contact (1), and the distance from the conductive pressure rod (5111) to the axis of the moving contact (1) is larger than the rotation radius of the moving contact (1).

5. The load switch according to claim 2, characterized in that: Also includes: Housing (20); The elastic component (9) is provided with a first hinged portion and a second hinged portion at both ends, wherein one of the first hinged portion and the second hinged portion is hinged to the housing (20) and the other is hinged to the rotating portion (513); During the process of switching the load switch from the open state to the closed state, the rotating member (51) rotates around the second rotation direction and compresses the elastic component (9), and when the elastic component (9) releases the compression energy and recovers the deformation, the rotating member (51) is kept in the first position; During the process of switching the load switch from the closed state to the open state, the rotating member (51) rotates around the first rotation direction and compresses the elastic component (9), and when the elastic component (9) releases the compression energy and recovers the deformation, the rotating member (51) is maintained at the second position.

6. The load switch according to claim 5, characterized in that: The elastic component (9) comprises a sleeve (91), a slide rod (92) and a spring (93); the slide rod (92) is slidably plugged into the sleeve (91); a first hinged portion is arranged at one end of the sleeve (91) away from the slide rod (92); a second hinged portion is arranged at one end of the slide rod (92) away from the sleeve (91); the spring (93) is sleeved on the sleeve (91) and the slide rod (92) and elastically abuts between the first hinged portion and the second hinged portion.

7. The load switch according to claim 1, characterized in that: A first avoidance hole (521) is provided at a position of the conductive bar (52) corresponding to the electromagnetic component (4), and the first avoidance hole (521) is used to avoid the electromagnetic component (4) to prevent the electromagnetic component (4) from interfering with the conductive bar (52) when moving.

8. The load switch according to claim 7, characterized in that: It also comprises a shell (20), wherein the conductive bar (52) and the electromagnetic assembly (4) are both arranged in the shell (20), and the shell (20) is provided with a second avoidance hole (202) concentric with the first avoidance hole (521).

9. The load switch according to any one of claims 1 to 8, characterized in that: It also includes a static contact seat (7). When the load switch is in a closed state, the moving contact (1) contacts the static contact (2), and the static contact (2), the moving contact (1) and the static contact seat (7) form a second circuit. The second circuit is connected in parallel with the first circuit.

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