A fully sealed structure isolating switch

Abstract

The application provides a full-sealing structure isolating switch applied to the technical field of arrangement of power supply switch devices, and comprises a sealing shell, a vacuum isolating sub-switch modularly integrated in the upper region of the sealing shell and used for three-phase power supply input and positioned and assembled through a horizontal plate, and an air isolating reversing sub-switch modularly integrated in the lower region of the sealing shell, arranged above and below the vacuum isolating sub-switch and electrically connected in series, and realizing the sequential conduction of a power supply loop, and comprising a route switching mechanism and a deflection lapping mechanism. The full-sealing integrated positioning design of the sealing shell realizes the modular assembly of the vacuum isolating sub-switch, the air isolating reversing sub-switch and the route switching execution mechanism, adapts to the modular installation demand of a power distribution system, simplifies the assembly steps, improves the assembly efficiency, improves the insulation protection reliability and reduces the risk of electric leakage.

Description

Technical Field

[0001] This application relates to the field of power supply switchgear arrangement technology, and in particular to a fully sealed disconnect switch. Background Technology

[0002] In existing power distribution systems, disconnect switches are core power supply control components, and the rationality of their assembly layout and the reliability of their insulation protection directly affect the operational stability and maintenance convenience of the power distribution system.

[0003] Currently, mainstream disconnect switches have components that are scattered. Vacuum disconnecting components, commutation components, and actuation components are mostly independently assembled structures without a unified integrated positioning carrier. This results in cumbersome assembly steps and insufficient ability to adapt to the modular installation requirements of power distribution systems. Furthermore, if existing vacuum disconnect switches are to achieve commutation functions, complex commutation and conduction structures must be set up, which is costly and has imperfect protection structures. Weak points in insulation are prone to appear at the connection points of various components. In harsh power distribution environments such as humid and dusty environments, safety hazards such as leakage and short circuits are likely to occur.

[0004] Therefore, a fully sealed disconnect switch is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this application is to address the shortcomings of existing disconnecting switches, such as dispersed component arrangement, complex assembly, and insufficient insulation protection, and to provide a fully sealed disconnecting switch, comprising: The sealed housing, serving as the core integration and positioning carrier, adopts a fully sealed design to achieve insulation protection and has standardized installation benchmarks inside, adapting to the modular assembly requirements of power distribution systems. The vacuum isolating sub-switch is modularly integrated into the upper area of ​​the sealed housing and is used for three-phase power input. It is assembled by positioning via a horizontal plate. The air-isolated commutator switch is modularly integrated in the lower part of the sealed housing. It is arranged vertically and electrically connected in series with the vacuum-isolated commutator switch to realize the sequential conduction of the power supply circuit. It includes a switching mechanism and a deflection connection mechanism. The switching mechanism is used for power output. Two sets of deflection connection mechanisms are symmetrically arranged on both sides of the switching mechanism to form a symmetrical switching output layout. The switching actuator is mounted on one side of the outer wall of the sealed housing and is connected to the internal deflection and overlap mechanism for transmission, so as to realize the coordinated linkage between the external drive and the internal switching action and simplify the layout of the operation end of the power distribution system.

[0006] Furthermore, the vacuum isolation sub-switch includes three sets of equidistantly arranged vacuum tubes, and a horizontal plate for installing the vacuum tubes is fixed inside the sealed housing; The vacuum tube is equipped with an arc-extinguishing chamber. A fixed conductive rod is fixed to the top of the arc-extinguishing chamber, and a movable conductive rod is slidably connected to the bottom of the arc-extinguishing chamber. The bottom of the vacuum tube is also equipped with a splitting and engaging mechanism that drives the movable conductive rod to move upward and engage with the fixed conductive rod. The top of the vacuum tube is provided with a terminal block that is electrically connected to the fixed conductive rod, and the three sets of terminals are respectively electrically connected to the three-phase power supply cable. The bottom of the horizontal plate is fixed with a fixed contact corresponding to the vacuum tube by an insulator. The fixed contact includes a terminal block electrically connected to the opening and closing mechanism and a conductive slider electrically connected to the terminal block.

[0007] Furthermore, the switching mechanism includes a switching main shaft rotatably connected within a sealed housing. An insulator three corresponding to each vacuum tube is fixed on the switching main shaft. An insulating wheel coaxially arranged with the switching main shaft is fixed on the insulator three. An assembly semi-annular groove is provided on the top of the insulating wheel, and an arc-shaped conductive component is fixed in the assembly semi-annular groove. The arc-shaped conductive component includes a conductive rail, the conductive slider is slidably connected to the conductive rail, and conductive grooves are symmetrically fixed on both sides of the conductive rail.

[0008] Furthermore, the insulating wheel is symmetrically provided with two sets of sealing groove mechanisms on both sides of the assembly semi-annular groove. The sealing groove mechanism includes an arc-shaped sliding cover. Two sets of sliders are symmetrically fixed on the inner wall of the arc-shaped sliding cover. The outer side of the switching main shaft is provided with an arc-shaped sliding groove that cooperates with the slider. A tension spring is clamped and fixed between the slider and the arc-shaped sliding groove. The tension spring has an elastic force that drives the two sets of sealing groove mechanisms to move away from each other. A circumferential insulating baffle is also fixed to the top of the conductive rail, and the outer diameter of the circumferential insulating baffle is smaller than the inner diameter of the arc-shaped sliding cover.

[0009] Furthermore, the deflection lap mechanism includes a synchronous deflection shaft rotatably connected within the sealed housing, and a moving contact corresponding to insulator three is provided on the synchronous deflection shaft, the moving contact being fixed to the synchronous deflection shaft by insulator two. The moving contact includes a terminal block for connecting the outgoing cable, and the terminal block is electrically connected to a conductive locking block for rotating and locking into a conductive groove. Both sets of insulators on the deflection lap mechanism are synchronously tilted in the same direction.

[0010] Furthermore, the conductive snap-fit ​​block has a snap-fit ​​arc groove on the side that contacts the conductive groove, and the outer diameter of the snap-fit ​​arc groove is equal to the inner diameter of the conductive groove. The conductive contact block has an anti-arc stripping groove on the side near the terminal three. The arc-shaped sliding cover has an arc-shaped pressing head on the side opposite to the moving contact. The radius of the arc-shaped pressing head is smaller than the radius of the anti-arc stripping groove. The top of the arc-shaped pressing head has an arc-extinguishing insulating baffle that cooperates with the terminal three.

[0011] Furthermore, the switching actuator includes two sets of parallel rods fixed to the ends of the synchronous deflection shaft. A power transmission arm is provided between the tops of the two sets of parallel rods. The two ends of the power transmission arm are rotatably connected to the tops of the parallel rods respectively. An actuator is fixed to the end of the switching main shaft. The end of the actuator away from the switching main shaft is rotatably connected to the end of one of the parallel rods through a connecting rod.

[0012] Furthermore, a limit lock block is fixed to the end of the switching spindle. The two sets of limit lock blocks are arranged at right angles. An insulating sleeve is fixed to one side of the sealed housing. An insulating pull rod is slidably connected inside the insulating sleeve. The top end of the insulating pull rod is fixedly connected to the execution output end of the switching mechanism. A limit ring is fixed to the bottom end of the insulating pull rod. The bottom of the limit ring is provided with a limit groove that cooperates with the limit lock block. By engaging and disengaging the limit lock block and the limit groove, the switching action and the switching action of the vacuum isolator are interlocked to prevent switching under load.

[0013] Furthermore, the rotation of the switching spindle is manually driven by a handle or driven by a motor, adapting to the operational needs of different power distribution scenarios.

[0014] Compared to existing technologies, the advantages of this application are: The fully sealed integrated positioning design of the sealed housing of this invention enables modular assembly of the vacuum isolation sub-switch, the air isolation commutator sub-switch, and the switching actuator, adapting to the modular installation requirements of the power distribution system, simplifying the assembly steps, and improving assembly efficiency. At the same time, the fully sealed structure prevents the corrosion of internal components by harsh external environments such as humidity and dust, significantly improving the reliability of insulation protection and reducing the risk of leakage and short circuit faults.

[0015] The design of two sets of deflection connection mechanisms symmetrically arranged on both sides of the switching mechanism forms a symmetrical switching output layout. Combined with the synchronous drive of the synchronous deflection shaft, it ensures smooth and precise switching action and avoids the problems of switching offset and uneven force caused by a single-sided layout. The precise fit between the arc groove and the conductive groove of the conductive contact block further improves the stability of conductive contact after switching, enhances the operational safety of the power distribution system, and avoids serious failures such as arc burnout of components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the internal structure of this application; Figure 3 This is a schematic diagram showing the arrangement of the vacuum isolation sub-switch and the switching mechanism proposed in this application; Figure 4 This is a partial structural schematic diagram of the deflection overlap mechanism and the switching mechanism proposed in this application; Figure 5 This is a schematic diagram of the sealing mechanism in the sealing state as proposed in this application; Figure 6 This is a schematic diagram of the structure of the fixed contact proposed in this application; Figure 7 This is a schematic diagram of the deflection overlap mechanism proposed in this application; Figure 8 This is an exploded structural diagram of the switching mechanism proposed in this application; Figure 9 This is a schematic diagram showing the state of the device when it is inserted into the arc groove and abuts against the arc-shaped pressure head, as proposed in this application. Figure 10 This is a schematic diagram showing the state of the arc-shaped pressure head and the anti-dislodgement groove proposed in this application when they are in conjunction. Figure 11 This is a schematic diagram of the internal structure of the route-switching actuator proposed in this application; Figure 12 This is a schematic diagram of the structure when the limiting ring and the limiting lock block are engaged, as proposed in this application.

[0017] Explanation of the labels in the diagram: 1. Sealed housing; 11. Horizontal plate; 2. Switching actuator; 21. Parallel rod; 22. Connecting rod; 23. Power transmission arm; 24. Actuating rod; 25. Limiting lock block; 26. Limiting ring; 261. Limiting groove; 27. Insulating pull rod; 28. Insulating sliding sleeve; 3. Vacuum isolating switch; 31. Vacuum tube; 311. Arc extinguishing chamber; 312. Fixed conductive rod; 313. Moving conductive rod; 314. Opening and closing mechanism; 315. Terminal block one; 32. Insulator one; 33. Fixed contact; 331. Conductive slider; 332. Terminal block two; 4. Deflection lap joint mechanism; 41. Synchronous deflection shaft; 42. Insulator II; 43. Moving contact; 431. Conductive snap block; 4311. Snap-in arc groove; 4312. Anti-arc detachment groove; 432. Terminal block III; 5. Switching mechanism; 51. Switching main shaft; 52. Insulator III; 53. Insulating wheel; 531. Arc-shaped slide groove; 532. Assembly semi-annular groove; 533. Tensioning spring; 54. Sealing mechanism; 541. Arc-shaped sliding cover; 542. Arc-shaped pressure head; 543. Arc-extinguishing insulating baffle; 544. Sliding block; 55. Arc-shaped conductive component; 551. Conductive groove; 552. Conductive rail; 553. Circumferential insulating baffle. Detailed Implementation

[0018] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0019] Example: This invention provides a fully sealed disconnect switch; please refer to [link / reference]. Figure 1 - Figure 12 By using the sealed housing 1 as the core integrated positioning carrier, the modular integrated arrangement of the vacuum isolating sub-switch 3, the air isolating commutator sub-switch, and the switching actuator 2 is realized; the series structure arranged vertically and the symmetrical switching layout enhance the coordination and linkage of the mechanism; the addition of an interlocking structure avoids switching failures under load; and finally achieves the technical effects of adapting to the modular assembly of the power distribution system, improving the reliability of insulation protection, and simplifying operation and maintenance.

[0020] For details, please refer to the following first. Figure 1 - Figure 3 The sealed housing 1 serves as the core integration and positioning carrier of the entire disconnecting switch. It adopts a fully sealed design to achieve overall insulation protection. The internal standardized installation reference surface and connection structure provide a precise assembly positioning basis for other components, adapting to the modular assembly requirements of the power distribution system. This ensures that the layout of each component is neat and the spacing is uniform after assembly, thereby improving integration and synergy.

[0021] Please refer to this first. Figure 1 and Figure 12 The vacuum isolating sub-switch 3 is modularly integrated in the upper area of ​​the sealed housing 1 to realize the input control of three-phase power supply. Through the cooperation of the horizontal plate 11 with the standardized installation benchmark inside the sealed housing 1, the precise positioning and assembly are completed, ensuring the assembly alignment accuracy with the air isolating reversing sub-switch below.

[0022] The vacuum isolation switch 3 includes three sets of equidistantly arranged vacuum tubes 31. A horizontal plate 11 fixed inside the sealed housing 1 provides mounting support for the vacuum tubes 31. An arc-extinguishing chamber 311 is provided inside the vacuum tube 31. A fixed conductive rod 312 is fixed at the top of the arc-extinguishing chamber 311, and a movable conductive rod 313 is slidably connected at the bottom. A splitting mechanism 314 provided at the bottom of the vacuum tube 31 can drive the movable conductive rod 313 to move upward and engage with the fixed conductive rod 312 to realize the switching on and off of the power supply circuit. The top of the vacuum tube 31 is provided with a terminal 315 electrically connected to the fixed conductive rod 312. The three sets of terminals 315 are electrically connected to the corresponding three-phase power supply cables. The bottom of the horizontal plate 11 is fixed with a fixed contact 33 corresponding to the vacuum tube 31 by an insulator 32. The fixed contact 33 includes a terminal 332 electrically connected to the switching mechanism 314 and a conductive slider 331 electrically connected to the terminal 332, which is used to realize electrical connection with the switching mechanism 5 below.

[0023] Please refer to this first. Figure 3 The air-isolated commutator is modularly integrated in the lower part of the sealed housing 1, and is arranged vertically and electrically connected in series with the vacuum-isolated commutator 3 to realize the sequential conduction of the power supply circuit. Its core function is to complete the switching of power supply output.

[0024] The air-isolated commutator includes a switching mechanism 5 and a deflection connection mechanism 4. The switching mechanism 5 is used for switching power output. Two sets of deflection connection mechanisms 4 are symmetrically arranged on both sides of the switching mechanism 5 to form a symmetrical switching output layout, which improves switching stability.

[0025] For details, please refer to Figures 4-8 The switching mechanism 5 includes a switching main shaft 51 rotatably connected to the sealed housing 1. An insulator 3 52 corresponding to the vacuum tube 31 is fixed on the switching main shaft 51. An insulating wheel 53 coaxially arranged with the switching main shaft 51 is fixed on the insulator 3 52. The top of the insulating wheel 53 is provided with an assembly semi-annular groove 532. An arc-shaped conductive component 55 is fixed in the assembly semi-annular groove 532. The arc-shaped conductive component 55 includes a conductive rail 552. The conductive slider 331 of the vacuum isolator switch 3 is slidably connected to the conductive rail 552 to realize electrical conduction between the two. The conductive grooves 551 are symmetrically fixed on both sides of the conductive rail 552 for cooperating with the conductive snap-fit ​​block 431 of the deflection overlap mechanism 4.

[0026] Two sets of sealing mechanisms 54 are symmetrically arranged on both sides of the assembly semi-annular groove 532 of the insulating wheel 53. The sealing mechanism 54 includes an arc-shaped sliding cover 541. Two sets of sliders 544 are symmetrically fixed on the inner wall of the arc-shaped sliding cover 541. An arc-shaped sliding groove 531 that cooperates with the sliders 544 is provided on the outer side of the switching main shaft 51. A tension spring 533 is clamped and fixed between the sliders 544 and the arc-shaped sliding groove 531. The tension spring 533 has an elastic force that drives the two sets of sealing mechanisms 54 to move away from each other. A circumferential insulating baffle 553 is also fixed on the top of the conductive rail 552. The outer diameter of the circumferential insulating baffle 553 is smaller than the inner diameter of the arc-shaped sliding cover 541 to ensure the insulation and sealing effect.

[0027] The deflection connection mechanism 4 includes a synchronous deflection shaft 41 rotatably connected within the sealed housing 1. Moving contacts 43, corresponding one-to-one with insulators 52, are fixed on the synchronous deflection shaft 41 via insulators 2 42. The moving contacts 43 include terminals 3 432 for connecting outgoing cables and conductive locking blocks 431 electrically connected to terminals 3 432. The conductive locking blocks 431 are used to rotate and lock into conductive grooves 551 to achieve circuit switching. The insulators 2 42 on both sets of deflection connection mechanisms 4 are synchronously tilted in the same direction to ensure precise docking of the conductive locking blocks 431 and the conductive grooves 551.

[0028] The conductive contact block 431 has a snap-in groove 4311 on the side that contacts the conductive groove 551. The outer diameter of the snap-in groove 4311 is equal to the inner diameter of the conductive groove 551, which improves the stability of conductive contact. The conductive contact block 431 has an anti-disengagement groove 4312 on the side near the terminal 3 432. The arc-shaped sliding cover 541 is provided with an arc-shaped pressing head 542 on the side opposite to the moving contact 43. The radius of the arc-shaped pressing head 542 is smaller than the radius of the anti-disengagement groove 4312. The top of the arc-shaped pressing head 542 is provided with an arc-extinguishing insulating baffle 543 that cooperates with the terminal 3 432.

[0029] Please refer to this first. Figure 11 - Figure 12 The switching actuator 2 is mounted on one side of the outer wall of the sealed housing 1 and is connected to the internal deflection and connection mechanism 4 for transmission, so as to realize the coordinated linkage between the external drive and the internal switching action and simplify the layout of the operation end of the power distribution system.

[0030] The switching actuator 2 includes two sets of parallel rods 21 fixed to the ends of the synchronous deflection shaft 41. A power transmission arm 23 is provided between the tops of the two sets of parallel rods 21, and the two ends of the power transmission arm 23 are rotatably connected to the tops of the parallel rods 21 respectively. An actuator 24 is fixed to the end of the switching main shaft 51. The end of the actuator 24 away from the switching main shaft 51 is rotatably connected to the end of one side of the parallel rod 21 through a connecting rod 22. Through this connecting rod transmission structure, the coordinated linkage between the switching main shaft 51 and the synchronous deflection shaft 41 is realized.

[0031] To avoid switching under load, two sets of limit locking blocks 25 arranged at right angles are fixed at the end of the switching main shaft 51; an insulating sleeve 28 is fixed on one side of the sealing housing 1, and an insulating pull rod 27 is slidably connected inside the insulating sleeve 28. The top end of the insulating pull rod 27 is fixedly connected to the execution output end of the opening and closing mechanism 314, and a limit ring 26 is fixed at the bottom end of the insulating pull rod 27. The bottom of the limit ring 26 is provided with a limit groove 261 that cooperates with the limit locking block 25; the interlocking of the switching action and the opening and closing action of the vacuum isolating sub-switch 3 is realized by the engagement and disengagement of the limit locking block 25 and the limit groove 261.

[0032] Furthermore, the rotation of the switching spindle 51 can be manually driven by a handle or driven by a motor, adapting to the operational needs of different power distribution scenarios.

[0033] Based on the standardized installation benchmark inside the sealed housing 1, this invention completes the modular assembly of each component: the vacuum isolating sub-switch 3 is fixed to the upper region of the sealed housing 1 via the horizontal plate 11, ensuring that the three sets of vacuum tubes 31 are arranged at equal intervals; the switching mechanism 5 of the air isolating reversing sub-switch is rotatably connected to the lower region of the sealed housing 1 via the switching main shaft 51, ensuring that the switching mechanism 5 and the vacuum isolating sub-switch 3 are vertically aligned; two sets of deflection overlapping mechanisms 4 are symmetrically assembled on both sides of the switching mechanism 5, and rotatably connected to the sealed housing 1 via the synchronous deflection shaft 41; the switching execution mechanism 2 is assembled on the outer wall of the sealed housing 1, and the transmission connection with the internal deflection overlapping mechanism 4 and the switching mechanism 5 is completed through the connecting rod 22, parallel rod 21 and other structures; finally, the insulating sliding sleeve 28, insulating pull rod 27, limit ring 26 and other components of the interlocking structure are assembled in place to complete the overall integrated assembly.

[0034] During the power supply conduction phase, the three-phase power supply cables are electrically connected to the three sets of terminals 315 of the vacuum isolating sub-switch 3, and the outgoing cables are electrically connected to the terminals 432 of the deflection lap mechanism 4. The switching mechanism 314 is driven to move, causing the moving conductive rod 313 to move upward and engage with the fixed conductive rod 312, thus turning on the vacuum isolating sub-switch 3. At this time, the switching mechanism 314 drives the conductive slider 331 of the fixed contact 33 to contact and conduct with the conductive rail 552 of the switching mechanism 5 through the terminal 332, and the power supply circuit is transmitted to the switching mechanism 5.

[0035] When a circuit switching operation is required, the circuit switching actuator 2 is driven by a handle or motor. The power is transmitted to the synchronous deflection shaft 41 through the parallel rod 21 and the power transmission arm 23, which drives the moving contact 43 of the deflection overlap mechanism 4 to rotate, so that the conductive snap block 431 rotates and snaps into the conductive groove 551 of the circuit switching mechanism 5. During this process, the snap-in arc groove 4311 fits into the conductive groove 551 to ensure stable conductive contact. At the same time, the tension spring 533 of the sealing mechanism 54 drives the arc-shaped sliding cover 541 to move, so that the arc-shaped pressure head 542 is embedded in the anti-detachment arc groove 4312 of the conductive snap block 431, realizing anti-detachment limit and insulation sealing after circuit switching. The arc-extinguishing insulating baffle 543 cooperates with the terminal block 432 to prevent the spread of electric arc during circuit switching and ensure circuit switching safety. If it is necessary to switch the output circuit, the circuit switching actuator 2 is reverse-driven to disengage the conductive locking block 431 from the current conductive slot 551, and the conductive locking block 431 on the other side rotates to the conductive slot 551 on the other side to complete the locking, realizing symmetrical circuit switching output.

[0036] When the vacuum isolating sub-switch 3 is in the conducting state, the switching mechanism 314 drives the limiting ring 26 to move downward through the insulating pull rod 27. The limiting groove 261 of the limiting ring 26 engages with the limiting lock block 25 at the end of the switching main shaft 51, restricting the rotation of the switching main shaft 51 and preventing switching under load. When switching is required, the switching mechanism 314 is driven to operate first, causing the moving conductive rod 313 to separate from the fixed conductive rod 312, and the vacuum isolating sub-switch 3 is opened. At this time, the insulating pull rod 27 drives the limiting ring 26 to move upward, and the limiting groove 261 separates from the limiting lock block 25, releasing the rotation restriction of the switching main shaft 51, and the switching action can be performed normally, realizing the interlock protection of switching and switching actions.

[0037] The fully sealed integrated positioning design of the sealed housing 1 of the present invention realizes the modular assembly of the vacuum isolation sub-switch 3, the air isolation commutator sub-switch and the circuit switching actuator 2, which is compatible with the modular installation requirements of the power distribution system, simplifies the assembly steps and improves the assembly efficiency; at the same time, the fully sealed structure prevents the corrosion of internal components by harsh environments such as external moisture and dust, significantly improves the reliability of insulation protection and reduces the risk of leakage and short circuit faults.

[0038] The design of two sets of deflection connection mechanisms 4 symmetrically arranged on both sides of the switching mechanism 5 forms a symmetrical switching output layout. With the synchronous drive of the synchronous deflection shaft 41, the switching action is ensured to be smooth and accurate, avoiding the problems of switching offset and uneven force caused by the single-sided layout. The precise cooperation between the arc groove 431 of the conductive contact block 431 and the conductive groove 551 further improves the stability of conductive contact after switching, enhances the operational safety of the power distribution system, and avoids serious failures such as arc burnout of components.

[0039] The above description is merely the best implementation method adopted in light of current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A fully sealed disconnect switch, characterized in that, include: The sealed housing (1), as the core integration and positioning carrier, adopts a fully sealed design to achieve insulation protection. It has a standardized installation benchmark inside to adapt to the modular assembly requirements of the power distribution system. The vacuum isolation sub-switch (3) is modularly integrated into the upper area of ​​the sealed housing (1) for three-phase power input and is positioned and assembled by the horizontal plate (11); The air-isolated commutator switch is modularly integrated in the lower part of the sealed housing (1), and is arranged vertically and electrically connected with the vacuum-isolated commutator switch (3) to realize the sequential conduction of the power supply circuit. It includes a switching mechanism (5) and a deflection connection mechanism (4). The switching mechanism (5) is used for power output, and the two sets of deflection connection mechanisms (4) are symmetrically arranged on both sides of the switching mechanism (5) to form a symmetrical switching output layout. The switching actuator (2) is mounted on one side of the outer wall of the sealed housing (1) and is connected to the internal deflection and connection mechanism (4) to realize the coordinated linkage between the external drive and the internal switching action, simplifying the layout of the operation end of the power distribution system.

2. The fully sealed disconnect switch according to claim 1, characterized in that, The vacuum isolation sub-switch (3) includes three sets of equidistantly arranged vacuum tubes (31), and a horizontal plate (11) for installing the vacuum tubes (31) is fixed inside the sealed housing (1). The vacuum tube (31) is provided with an arc-extinguishing chamber (311), a fixed conductive rod (312) is fixed at the top of the arc-extinguishing chamber (311), a movable conductive rod (313) is slidably connected at the bottom of the arc-extinguishing chamber (311), and a splitting and engaging mechanism (314) is provided at the bottom of the vacuum tube (31) to drive the movable conductive rod (313) to move upward and engage with the fixed conductive rod (312). The top of the vacuum tube (31) is provided with a terminal block (315) that is electrically connected to the fixed conductive rod (312), and the three sets of terminals (315) are respectively electrically connected to the three-phase power supply cable. The bottom of the horizontal plate (11) is fixed with a fixed contact (33) corresponding to the vacuum tube (31) by an insulator (32). The fixed contact (33) includes a terminal (332) electrically connected to the opening and closing mechanism (314) and a conductive slider (331) electrically connected to the terminal (332).

3. The fully sealed disconnect switch according to claim 2, characterized in that, The switching mechanism (5) includes a switching main shaft (51) rotatably connected to the sealed housing (1). An insulator three (52) corresponding to the vacuum tube (31) is fixed on the switching main shaft (51). An insulating wheel (53) coaxially arranged with the switching main shaft (51) is fixed on the insulator three (52). The top of the insulating wheel (53) is provided with an assembly semi-annular groove (532). An arc-shaped conductive element (55) is fixed in the assembly semi-annular groove (532). The arc-shaped conductive component (55) includes a conductive rail (552), and the conductive slider (331) is slidably connected to the conductive rail (552). The conductive rail (552) has conductive grooves (551) symmetrically fixed on both sides.

4. A fully sealed disconnect switch according to claim 3, characterized in that, The insulating wheel (53) is symmetrically provided with two sets of sealing mechanisms (54) on both sides of the assembly semi-annular groove (532). The sealing mechanism (54) includes an arc-shaped sliding cover (541). Two sets of sliders (544) are symmetrically fixed on the inner wall of the arc-shaped sliding cover (541). The outer side of the switching main shaft (51) is provided with an arc-shaped sliding groove (531) that cooperates with the slider (544). A tension spring (533) is clamped and fixed between the slider (544) and the arc-shaped sliding groove (531). The tension spring (533) has an elastic force that drives the two sets of sealing mechanisms (54) to move away from each other. The top of the conductive rail (552) is also fixed with a circumferential insulating baffle (553), the outer diameter of which is smaller than the inner diameter of the arc-shaped sliding cover (541).

5. A fully sealed disconnect switch according to claim 4, characterized in that, The deflection connection mechanism (4) includes a synchronous deflection shaft (41) rotatably connected to the sealed housing (1). The synchronous deflection shaft (41) is provided with a moving contact (43) corresponding to the insulator three (52). The moving contact (43) is fixed to the synchronous deflection shaft (41) through the insulator two (42). The moving contact (43) includes a terminal block (432) for connecting the outgoing cable, the terminal block (432) is electrically connected to a conductive snap-fit ​​block (431), and the conductive snap-fit ​​block (431) is used to rotate and snap into the conductive groove (551). The insulators (42) on both sets of deflection lap mechanisms (4) are synchronously tilted in the same direction.

6. A fully sealed disconnect switch according to claim 5, characterized in that, The conductive snap-fit ​​block (431) has a snap-fit ​​arc groove (4311) on the side that contacts the conductive groove (551), and the outer diameter of the snap-fit ​​arc groove (4311) is equal to the inner diameter of the conductive groove (551). The conductive contact block (431) has an anti-arc stripping groove (4312) on the side near the terminal block (432). The arc-shaped sliding cover (541) has an arc-shaped pressing head (542) on the side opposite to the moving contact (43). The radius of the arc-shaped pressing head (542) is smaller than the radius of the anti-arc stripping groove (4312). The top of the arc-shaped pressing head (542) has an arc-extinguishing insulating baffle (543) that cooperates with the terminal block (432).

7. A fully sealed disconnect switch according to claim 6, characterized in that, The switching actuator (2) includes two sets of parallel rods (21) fixed to the ends of the synchronous deflection shaft (41). A power transmission arm (23) is provided between the tops of the two sets of parallel rods (21). The two ends of the power transmission arm (23) are rotatably connected to the top ends of the parallel rods (21). An actuator (24) is fixed to the end of the switching main shaft (51). The end of the actuator (24) away from the switching main shaft (51) is rotatably connected to the end of the parallel rod (21) on one side through a connecting rod (22).

8. A fully sealed disconnect switch according to claim 7, characterized in that, The end of the switching spindle (51) is also fixed with a limit lock block (25). The two sets of limit lock blocks (25) are arranged at right angles. An insulating sleeve (28) is fixed on one side of the sealing housing (1). An insulating pull rod (27) is slidably connected inside the insulating sleeve (28). The top end of the insulating pull rod (27) is fixedly connected to the execution output end of the opening and closing mechanism (314). A limit ring (26) is fixed at the bottom end of the insulating pull rod (27). The bottom of the limit ring (26) is provided with a limit groove (261) that cooperates with the limit lock block (25). By engaging and disengaging the limit lock block (25) and the limit groove (261), the switching action and the opening and closing action of the vacuum isolating sub-switch (3) are interlocked to prevent switching under load.

9. A fully sealed disconnect switch according to claim 7, characterized in that, The rotation of the switching spindle (51) is driven manually by a handle or by a motor, adapting to the operational needs of different power distribution scenarios.

Images