High-voltage line control device and control method thereof

Abstract

The invention relates to the technical field of circuit breakers, in particular to a high-voltage line control device and a control method thereof.The high-voltage line control device comprises a protection box, and a partition plate is arranged in the protection box. The protection box is of a totally-closed structure, internal electrical components are isolated from external rainwater, dust, ultraviolet rays and other environmental factors, the problems of insulation aging, metal corrosion and the like caused by long-term outdoor exposure of the components are avoided, the service life of equipment is remarkably prolonged, the interior of the protection box is divided into independent modular areas through the partition plate, and upper circuit control is achieved; the device is divided into a line control function module, a voltage mutual inductance function module and an isolation function module, all the modules independently operate under isolation of partition plates, electromagnetic interference and heat conduction are reduced, the operation stability of the device is improved, the different function modules are physically isolated, space redundancy is reduced, independent production, debugging and overhauling are facilitated, fault spreading between the modules is prevented, and the space utilization rate is improved. And miniaturization and combination are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a high-voltage line control device and a control method thereof. Background Art

[0002] Outdoor circuit breakers are three-phase, 50Hz, 12kV, high-voltage AC switchgear designed for interrupting and closing load, overload, and short-circuit currents in power systems. They are suitable for protection and control in substations and power distribution systems in industrial and mining enterprises, and are particularly well-suited for rural power grids and locations with frequent operation. They can also serve as sectionalizers for power grids. Adding a controller enables automated distribution network operation.

[0003] A high-voltage line control device with publication number CN118116764A comprises: a mounting frame; a circuit breaker body; and the circuit breaker body is mounted on the mounting frame. The high-voltage line control device can realize the opening and closing of the isolating switch mechanism and the grounding static contact through a first pushing component, and the opening and closing of the grounding switch mechanism and the grounding static contact through a second pushing component. The isolating switch mechanism is opened by the first pushing component to effectively isolate the power supply, and the device can be grounded by closing the switch through the grounding switch mechanism, which can effectively guide the charge on the device to the ground, reduce voltage suspension, and reduce the risk of electric shock. However, most of the components of these existing high-voltage line control devices are exposed to the outside. If placed outdoors for a long time, they are prone to aging and damage, which affects their service life. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that most of the components of the existing high-voltage line control device are exposed to the outside, and are easily aged and damaged when placed outdoors for a long time, which affects the service life. A high-voltage line control device is provided to avoid problems such as insulation aging and metal corrosion caused by long-term outdoor exposure of components, improve the operating stability of the device, physically isolate different functional modules, reduce space redundancy, facilitate independent production, debugging, and maintenance, prevent the spread of faults between modules, improve space utilization, and achieve miniaturization and combination.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a high-voltage line control device, including a protective box, a partition plate is arranged inside the protective box, a line control mechanism is arranged inside the protective box and is located above the partition plate, a voltage mutual inductance mechanism and an isolation mechanism are arranged inside the protective box and are located below the partition plate, and a switch mechanism is connected to the side of the protective box.

[0006] As a further description of the above technical solution: a support seat is provided at the bottom of the protection box, inspection doors are provided on the sides and bottom of the protection box, and an explosion-proof cover is provided on the top of the protection box.

[0007] As a further description of the above technical solution: the line control mechanism includes a vacuum tube base body, and an incoming bushing and an outgoing bushing are respectively provided at both ends of the vacuum tube base body. A zero-sequence current transformer is installed on one side of the outgoing bushing, and a vacuum interrupter bushing is provided at one end of the incoming bushing. The lower end of the incoming bushing is connected to the first contact finger seat through a conductive rod, and the lower end of the outgoing bushing is connected to the second contact finger seat through a conductive rod.

[0008] As a further description of the above technical solution: the voltage transformer mechanism includes multiple voltage transformer bodies, a detuning transformer is provided on the side of the voltage transformer body, a micro fuse is provided on the voltage transformer body, a rubber sleeve is provided on the micro fuse, and the micro fuse is located below the line control mechanism.

[0009] As a further description of the above technical solution: the isolation mechanism includes an insulating drive shaft, the insulating drive shaft is connected to the switch mechanism, an isolation sleeve assembly is sleeved on the insulating drive shaft, a drive rod is connected to the insulating drive shaft, and clamps are connected to both ends of the drive rod.

[0010] As a further description of the above technical solution: the switch mechanism includes a sealed box, a driving member is provided on the sealed box, the driving member is connected to the isolation mechanism through a gear set, the gear set is connected to the pull rod through a transmission member, and the pull rod is connected to the line control mechanism.

[0011] As a further description of the above technical solution: the voltage mutual inductance mechanism is located on one side of the isolation mechanism, and the voltage mutual inductance mechanism is located on the isolation mechanism and is detachably connected to the partition plate.

[0012] As a further description of the above technical solution: flanges and sleeve sealing rings are provided at the connections between the inlet sleeve, the outlet sleeve and the vacuum tube base body.

[0013] As a further description of the above technical solution: a main shaft is provided on the vacuum tube base body, a crank arm is provided on the main shaft, and the crank arm is connected to the vacuum interrupter sleeve through an insulating pull rod.

[0014] As a further description of the above technical solution: an elastic pressing sheet and a gasket are provided on the clamping jaws.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] The present invention adopts a fully enclosed structure through the protective box to isolate the internal electrical components from external environmental factors such as rain, dust, and ultraviolet rays, thereby avoiding problems such as insulation aging and metal corrosion caused by long-term outdoor exposure of the components, and significantly extending the service life of the equipment. The interior of the protective box is divided into independent modular areas through the partition plate. The upper line control is divided into three functional modules: line control, voltage mutual inductance, and isolation. Each module operates independently under the isolation of the partition plate, reducing electromagnetic interference and heat conduction, improving the operation stability of the device, physically isolating different functional modules, reducing space redundancy, facilitating independent production, debugging, and maintenance, preventing the spread of faults between modules, improving space utilization, and realizing miniaturization and combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a high-voltage line control device in one embodiment of the present invention;

[0018] Figure 2 1 is an internal schematic diagram of a high-voltage line control device in an embodiment of the present invention;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure of the middle line control mechanism;

[0020] Figure 4 for Figure 2 Schematic diagram of the structure of the switch mechanism;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure of the central spindle;

[0022] Figure 6 for Figure 2 Schematic diagram of the structure of the medium voltage mutual inductance mechanism;

[0023] Figure 7 for Figure 2 Schematic diagram of the structure of the isolation mechanism;

[0024] Figure 8 for Figure 2 Side view of the isolation mechanism.

[0025] Legend:

[0026] 1. Protective box; 2. Partition plate; 3. Line control mechanism; 4. Voltage mutual inductance mechanism; 5. Isolation mechanism; 6. Switch mechanism; 7. Support base; 8. Inspection door; 9. Explosion-proof cover; 31. Vacuum tube base body; 32. Inlet bushing; 33. Outlet bushing; 34. Zero-sequence current transformer; 35. Vacuum interrupter bushing; 36. Conductor rod; 37. First contact finger seat; 38. Second contact finger seat; 39. Flange; 310. Bushing seal; 311. Main Shaft; 312, crank arm; 313, insulating pull rod; 41, voltage transformer body; 42, detuning transformer; 43, miniature fuse; 44, rubber bushing; 51, insulating drive shaft; 52, isolation sleeve assembly; 53, drive rod; 54, clamping jaw; 55, bearing seat; 56, elastic pressure piece; 57, gasket; 521, bushing; 522, circular isolation piece; 61, sealing box; 62, drive member; 63, gear set; 64, transmission member; 65, pull rod. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] like Figure 1-8 As shown, a high-voltage line control device of the present invention includes a protective box 1, a partition plate 2 is provided inside the protective box 1, a line control mechanism 3 is provided inside the protective box 1 and is located on the upper part of the partition plate 2, a voltage mutual inductance mechanism 4 and an isolation mechanism 5 are provided inside the protective box 1 and are located at the lower part of the partition plate 2, and a switch mechanism 6 is connected to the side of the protective box 1.

[0031] In the technical solution of the present invention, the protective box 1 adopts a fully enclosed structure to isolate the internal electrical components from external environmental factors such as rain, dust, and ultraviolet rays, thereby avoiding problems such as insulation aging and metal corrosion caused by long-term outdoor exposure of the components, and significantly extending the service life of the equipment. The upper line control of the protective box is divided into three functional modules: line control, voltage mutual inductance, and isolation. Each module operates independently under the isolation of the partition plate 2, reducing electromagnetic interference and heat conduction, improving the operation stability of the device, physically isolating different functional modules, reducing space redundancy, facilitating independent production, debugging, and maintenance, preventing the spread of faults between modules, improving space utilization, and realizing miniaturization and combination.

[0032] The voltage mutual inductance mechanism 4 is located on one side of the isolation mechanism 5 , and both the voltage mutual inductance mechanism 4 and the isolation mechanism 5 are detachably connected to the partition plate 2 .

[0033] like Figure 1 and Figure 2 As shown, the protective box 1 is provided with a support base 7 at the bottom, access doors 8 at the sides and bottom, and an explosion-proof cover 9 at the top. The support base 7 is fixed to the bottom of the protective box, elevating the device body to prevent the bottom from directly contacting the ground or accumulating water, reducing the risk of moisture erosion and physical damage. The access doors 8 are provided on the sides and bottom to provide access for maintenance, inspection, and replacement of the internal modules. The explosion-proof cover 9 is provided at the top. When an internal fault occurs and high-pressure gas is generated, a directional pressure relief channel is provided to prevent the entire box from bursting, ensuring the safety of equipment and personnel.

[0034] like Figure 3 and Figure 5 As shown, the line control mechanism 3 includes a vacuum tube base body 31, with an incoming bushing 32 and an outgoing bushing 33 provided at both ends of the vacuum tube base body 31 respectively. A zero-sequence current transformer 34 is installed on one side of the outgoing bushing 33, and a vacuum interrupter bushing 35 is provided at one end of the incoming bushing 32. The lower end of the incoming bushing 32 is connected to the first contact finger seat 37 through a conductive rod 36, and the lower end of the outgoing bushing 33 is connected to the second contact finger seat 38 through a conductive rod 36.

[0035] Specifically, the vacuum tube base body 31 serves as the supporting skeleton of the entire mechanism, encapsulating the vacuum interrupter and providing mechanical strength and installation reference. The incoming bushing 32 and the outgoing bushing 33 connect the external incoming and outgoing lines, introduce the external high-voltage wires into / out of the device, and provide high-voltage insulation. The vacuum interrupter is encapsulated inside the vacuum interrupter bushing 35 to interrupt the current in a vacuum, with strong arc extinguishing ability, long service life, and maintenance-free. The conductive rod 36 and the first contact finger seat 37 and the second contact finger seat 38 constitute the main current path inside the mechanism, connecting the incoming / outgoing bushing and the moving / static contacts of the vacuum interrupter (the contact finger seat is usually connected to the moving contact system). The zero-sequence current transformer 34 is installed on one side of the outgoing bushing to provide a signal for the protection device by detecting the zero-sequence current (unbalanced current, ground fault current) of the line.

[0036] The vacuum tube base 31 encloses the vacuum interrupter, circular spacers 522 ensure phase spacing, inlet and outlet bushings provide high-voltage insulation, rubber sleeves 47 protect fuses, and the insulated drive shaft 51 and insulated pull rod 313 isolate high and low voltages. These structures collectively improve the device's overall insulation performance and electrical consistency, reducing failures caused by insulation aging.

[0037] Among them, flanges 39 and sleeve sealing rings 310 are provided at the connections between the incoming / outgoing sleeves 32 and the vacuum tube base body 31; the flanges 39 and sleeve sealing rings 310 are located at the connections between the incoming / outgoing sleeves and the vacuum tube base, thereby achieving double sealing, ensuring the airtightness of the connections, preventing external moisture and dust from invading, and solving the key problem of outdoor aging.

[0038] A main shaft 311 is provided on the vacuum tube base body 31, and a crank arm 312 is provided on the main shaft 311. The crank arm 312 is connected to the vacuum interrupter sleeve 35 by an insulating pull rod 313. The main shaft 311, the crank arm 312, and the insulating pull rod 313 constitute an operating transmission mechanism. The switching mechanism drives the crank arm to rotate through the main shaft, and the crank arm drives the insulating pull rod. The insulating pull rod finally drives the moving contact inside the vacuum interrupter to perform opening / closing operations. The insulating pull rod ensures that the operating components are isolated from high potential.

[0039] like Figure 2 and Figure 6 As shown, the voltage transformer mechanism 4 includes multiple voltage transformer bodies 41, a detuning transformer 42 is provided on the side of the voltage transformer body 41, a miniature fuse 43 is provided on the voltage transformer body 41, a rubber sleeve 44 is provided on the miniature fuse 43, and the miniature fuse 43 is located below the line control mechanism 3.

[0040] Specifically, the high voltage is proportionally converted into a standard low voltage through the voltage transformer body 41, and the detuning transformer 42 is set on the side of the voltage transformer to suppress the ferromagnetic resonance overvoltage that may be generated when the voltage transformer core is saturated, thereby protecting the transformer and the system safety. The micro fuse 43 is set on the voltage transformer as an overcurrent protection of the voltage transformer. It quickly blows when there is an internal fault in the transformer or a short circuit on the secondary side to isolate the fault. The rubber sleeve 47 is put on the micro fuse to strengthen the insulation and sealing, prevent the exposed part of the fuse from moisture and dust accumulation, resulting in flashover or corrosion, and extend the life of the fuse. By being located below the line control mechanism, the spatial layout is utilized, and it is convenient to sense the voltage signal from the main circuit.

[0041] like Figure 7 and Figure 8 As shown, the isolation mechanism 5 includes an insulating drive shaft 51, which is connected to the switch mechanism 6. An isolation sleeve assembly 52 is sleeved on the insulating drive shaft 51, and a drive rod 53 is connected to the insulating drive shaft 51. Both ends of the drive rod 53 are connected to clamps 54, and one end of the insulating drive shaft 51 is connected to a bearing seat 55.

[0042] Specifically, the switch mechanism is connected through the insulating drive shaft 51 to transmit the operating torque while ensuring that the operator is isolated from the high potential. The drive rod 53 is connected to the insulating drive shaft to convert the rotational motion of the insulating drive shaft into the motion required by the driving clamp. The clamp 54 is connected to both ends of the drive rod and serves as a moving contact to cooperate with the contact finger seat 38 to realize the connection and separation of the isolation break.

[0043] Among them, the isolation sleeve assembly 52 includes a sleeve 521, which is sleeved on the insulating drive shaft 51. A plurality of circular isolation plates 522 are provided on the sleeve 521, and adjacent jaws 54 are separated by the circular isolation plates 522; the isolation sleeve assembly 52 includes the sleeve 521 and the circular isolation plates 522, and the sleeve supports and fixes the insulating drive shaft; the circular isolation plates are installed on the sleeve to physically isolate the jaws of adjacent phases to ensure the insulation strength between phases and a safe electrical gap.

[0044] The clamping jaw 54 is provided with an elastic pressure piece 56 and a gasket 57. The elastic pressure piece 56 and gasket 57 are arranged on the clamping jaw. The elastic pressure piece ensures stable and sufficient contact pressure between the clamping jaw and the static contact, reducing contact resistance and preventing heat generation. The gasket may be used to adjust pressure or protect the contact surface.

[0045] like Figure 1 and Figure 2 As shown, the switch mechanism 6 includes a sealed box 61 , on which a driving member 62 is provided. The driving member 62 is connected to the isolation mechanism 5 through a gear set 63 . The gear set 63 is connected to a pull rod 65 through a transmission member 64 . The pull rod 65 is connected to the main shaft 311 .

[0046] Specifically, the sealed box 61 houses the operating components, sealing and protecting the internal drive components, gear train, and other components to prevent corrosion, jamming, or short circuits caused by the intrusion of dust, moisture, and small animals. This core feature addresses outdoor aging issues. The operating motive force is provided by the drive component 62, which transmits and amplifies torque through the gear train 63, transferring the motion / torque of the drive component. The transmission component 64 links the isolation mechanism and the line control mechanism. The gear train drives the insulated drive shaft 51 of the isolation mechanism through the transmission component, and drives the main shaft 311 of the line control mechanism through the pull rod 65. The pull rod 65 connects the gear train and the main shaft 311 of the line control mechanism, transmitting the operating force of the switch mechanism to the main shaft of the line control mechanism, driving the vacuum interrupter to open and close.

[0047] Among them, a multi-layer sealing protection system is jointly constructed by the protective box 1, partition plate, sealing box 61, flange 39, bushing sealing ring 310, and maintenance door 8, and the core components (vacuum arc chamber, mutual inductor, fuse, operating mechanism) are completely placed in a sealed or semi-sealed environment, which greatly reduces the area and time of components (especially insulating parts, conductive connectors, and mechanical parts) directly exposed to harsh outdoor environments such as sunlight, rain, dust, and salt spray, fundamentally delaying the aging process and significantly improving the service life and reliability of the equipment.

[0048] A control method for a high-voltage line control device. S1. The interior of a protective box 1 is divided into independent chambers by a partition plate 2. A line control mechanism 3 is installed in the upper chamber to perform line on / off operations. A voltage mutual inductor mechanism 4 and an isolation mechanism 5 are installed side by side in the lower chamber to respectively implement voltage monitoring and electrical isolation.

[0049] S2. Linked opening and closing control: When the driving member 62 of the switch mechanism 6 is started, the two mechanisms are synchronously driven through the gear set 63:

[0050] First path: The transmission member 64 drives the pull rod 65 to rotate the main shaft 311 of the line control mechanism 3; the main shaft 311 controls the opening and closing of the contacts in the vacuum interrupter bushing 35 through the crank arm 312 and the insulating pull rod 313, thereby interrupting the load current;

[0051] Second path: directly drives the insulating drive shaft 51 of the isolation mechanism 5; the insulating drive shaft 51 drives the clamping jaw 54 to open and close via the drive rod 53, forming a visible isolation breakpoint;

[0052] S3. State collaborative management: When line control mechanism 3 opens, isolation mechanism 5 opens simultaneously to ensure maintenance safety; when line control mechanism 3 closes, isolation mechanism 5 closes first to establish the main path;

[0053] S4. Fault protection triggering: The voltage mutual inductance mechanism 4 monitors ferromagnetic resonance through the detuning mutual inductor 42 and realizes overload protection by blowing the micro fuse 43; the zero-sequence current transformer 34 detects the ground fault current in real time and triggers the protection signal.

[0054] The protective box 1 is fixed outdoors through the support base 7, and the inspection door 8 and the explosion-proof cover 9 are closed to form a fully enclosed protection; the partition plate 2 divides the interior into three modules, and each module is assembled after independent debugging; the driving part 62 of the switch mechanism 6 receives the closing signal, drives the main shaft 311 to rotate through the gear set 63 and the transmission part 64, and the insulating pull rod 313 pulls the vacuum interrupter bushing 35 to close. The incoming bushing 32 and the outgoing bushing 33 are connected to the circuit through the conductive rod 36 and the contact finger seat, and the zero-sequence current transformer 34 monitors the line current in real time; the voltage transformer body 41 converts the high-voltage line voltage into a low-voltage signal The detuning transformer 42 suppresses harmonics, the miniature fuse 43 provides protection when overloaded, and the rubber sleeve 47 provides insulation protection; when maintenance is required, the circuit is first disconnected through the line control mechanism 3, and then the switch mechanism 6 drives the insulating drive shaft 51 to rotate, the drive rod 53 drives the clamping claw 54 to separate, the circular isolation piece 522 forms an electrical isolation fracture, and the elastic pressing piece 56 keeps the clamping claw 54 in a separated state; open the corresponding maintenance door 8, and the line control mechanism 3, voltage mutual inductance mechanism 4 or isolation mechanism 5 can be independently repaired without disassembling other modules. After the maintenance is completed, the maintenance door is closed and operation is resumed.

[0055] Specifically, the high-voltage line control device achieves fully enclosed protection, modular design and automated control through the coordinated operation of various structures, effectively solving the outdoor aging problem of traditional devices and improving the operational reliability and maintenance convenience of high-voltage lines.

[0056] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high voltage line control device, characterized in that: The invention comprises a protection box (1), wherein a partition plate (2) is provided inside the protection box (1), a line control mechanism (3) located above the partition plate (2) is provided inside the protection box (1), a voltage mutual inductance mechanism (4) and an isolation mechanism (5) located below the partition plate (2) are provided inside the protection box (1), and a switch mechanism (6) is connected to the side of the protection box (1).

2. The high-voltage line control device according to claim 1, characterized in that: The bottom of the protection box (1) is provided with a support seat (7), the sides and bottom of the protection box (1) are provided with inspection doors (8), and the top of the protection box (1) is provided with an explosion-proof cover (9).

3. The high-voltage line control device according to claim 1, characterized in that: The line control mechanism (3) comprises a vacuum tube base body (31), an incoming bushing (32) and an outgoing bushing (33) are respectively provided at both ends of the vacuum tube base body (31), a zero-sequence current transformer (34) is installed on one side of the outgoing bushing (33), a vacuum interrupter bushing (35) is provided at one end of the incoming bushing (32), the lower end of the incoming bushing (32) is connected to a first contact finger seat (37) through a conductive rod (36), and the lower end of the outgoing bushing (33) is connected to a second contact finger seat (38) through a conductive rod (36).

4. The high-voltage line control device according to claim 1, characterized in that: The voltage transformer mechanism (4) comprises a plurality of voltage transformer bodies (41), a detuning transformer (42) is provided on the side of the voltage transformer body (41), a micro fuse (43) is provided on the voltage transformer body (41), a rubber sleeve (44) is provided on the micro fuse (43), and the micro fuse (43) is located below the line control mechanism (3).

5. The high-voltage line control device according to claim 1, characterized in that: The isolation mechanism (5) comprises an insulating drive shaft (51), the insulating drive shaft (51) is connected to the switch mechanism (6), an isolation sleeve assembly (52) is sleeved on the insulating drive shaft (51), a drive rod (53) is connected to the insulating drive shaft (51), and both ends of the drive rod (53) are connected to clamping claws (54).

6. The high-voltage line control device according to claim 1, characterized in that: The switch mechanism (6) includes a sealed box (61), a driving member (62) is provided on the sealed box (61), the driving member (62) is connected to the isolation mechanism (5) through a gear set (63), the gear set (63) is connected to a pull rod (65) through a transmission member (64), and the pull rod (65) is connected to the line control mechanism (3).

7. The high-voltage line control device according to claim 1, characterized in that: The voltage mutual induction mechanism (4) is located on one side of the isolation mechanism (5), and the voltage mutual induction mechanism (4) and the isolation mechanism (5) are both detachably connected to the partition plate (2).

8. The high-voltage line control device according to claim 3, characterized in that: The connection points between the inlet bushing (32) and the outlet bushing (33) and the vacuum tube base body (31) are both provided with flanges (39) and bushing sealing rings (310).

9. The high-voltage line control device according to claim 3, characterized in that: A main shaft (311) is provided on the vacuum tube base body (31), a crank arm (312) is provided on the main shaft (311), and the crank arm (312) is connected to the vacuum interrupter sleeve (35) via an insulating pull rod (313).

10. A control method for a high-voltage line control device, characterized in that: S1, the interior of the protection box (1) is divided into independent chambers by a partition plate (2), the line control mechanism (3) is installed in the upper chamber to perform line on-off operations, and the voltage mutual induction mechanism (4) and the isolation mechanism (5) are installed side by side in the lower chamber to respectively realize voltage monitoring and electrical isolation; S2, when the driving member (62) of the switch mechanism (6) is started, the two-way mechanism is synchronously driven through the gear set (63); S3. When the line control mechanism (3) opens, the isolation mechanism (5) opens synchronously to ensure maintenance safety; when the line control mechanism (3) closes, the isolation mechanism (5) closes first to establish the main passage; S4, the voltage mutual inductance mechanism (4) monitors ferromagnetic resonance through the detuning mutual inductor (42), and realizes overload protection by melting the micro fuse (43).

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