High-voltage knife switch with arc extinguishing function and operation method thereof

Abstract

The present invention discloses a high-voltage knife switch with an arc extinguishing function and an operating method thereof, wherein the high-voltage switch includes a mounting base, on which two supporting insulators are spaced apart; the isolating knife switch includes a blade, and a first static contact and a second static contact respectively arranged on the two supporting insulators, the blade being rotatably connected to the first static contact, and the blade being capable of abutting or being spaced apart from the second static contact; the arc extinguishing device includes a gas storage tank, a connecting pipe and a nozzle, the gas storage tank storing sulfur hexafluoride gas, and the nozzle being spaced apart from the isolating knife switch through the connecting pipe. The high-voltage knife switch with an arc extinguishing function of the present invention is provided with the arc extinguishing device so that when the blade is spaced apart from the second static contact, the sulfur hexafluoride gas in the gas storage tank can be sprayed from the nozzle through the connecting pipe to extinguish the arc between the blade and the second static contact. The sulfur hexafluoride gas has good insulation and arc extinguishing effect, thereby improving the safety and reliability of the isolating knife switch and the circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage disconnect switches, and in particular to a high-voltage knife switch with an arc extinguishing function and an operating method thereof. Background Art

[0002] A high-voltage knife switch is a switching device used to connect and disconnect high-voltage circuits. It is primarily used in transmission lines and substations within power systems. When the switch is connected, current flows through its conductive material, ensuring normal power supply to the wires. However, when the switch is disconnected, the sudden interruption of current in the circuit creates a strong electric field between the switch blades and contacts. This field excites and ionizes electrons in the surrounding air molecules or insulating medium, forming a gas discharge phenomenon known as an arc. This arc produces an intense white light and high temperatures, reaching thousands of degrees Celsius or even higher.

[0003] Currently, traditional high-voltage disconnectors lack arc extinguishing capabilities. Extinguishing the arc primarily relies on the physical distance between the blades and contacts, as well as the natural cooling effect of air. Consequently, arcs are difficult to extinguish quickly in complex scenarios involving high voltage and high current, increasing the risk of damage to equipment and circuits. Furthermore, arcing can be accompanied by high temperatures and strong light, compromising operator safety. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-voltage knife switch with arc extinguishing function and an operating method thereof, which has a simple structure and is easy to operate, and its arc extinguishing device can actively eliminate the arc of the isolation knife switch, and has high safety.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a high-voltage knife switch with an arc extinguishing function is provided, comprising a mounting seat, a supporting insulator, an isolating knife switch and an arc extinguishing device, wherein two supporting insulators are arranged on the mounting seat at intervals along a first direction; the isolating knife switch comprises a first static contact, a second static contact and a blade, the length of the blade extends along the first direction, the first static contact and the second static contact are respectively arranged on the two supporting insulators, the blade is rotatably connected to the first static contact, and the end of the blade away from the first static contact can abut or be spaced from the second static contact; the arc extinguishing device comprises a gas tank, a connecting pipe and a nozzle, the gas tank is arranged on the mounting seat, and sulfur hexafluoride gas is stored in the gas tank, and the nozzle is arranged on one side of the isolating knife switch along the second direction through the connecting pipe, wherein the first direction is arranged perpendicular to the second direction.

[0007] As a preferred solution for the high-voltage knife switch with arc extinguishing function, the high-voltage knife switch with arc extinguishing function also includes an insulating baffle, which is arranged above the isolating knife switch at intervals along the vertical direction, and the end of the blade away from the first static contact can abut against the insulating baffle, and the first direction, the second direction and the vertical direction are arranged perpendicular to each other.

[0008] As a preferred solution for the high-voltage knife switch with arc extinguishing function, the spraying direction of the nozzle is a third direction, and the third direction is set at an acute angle to the vertical direction. The nozzle can blow the sulfur hexafluoride gas through the isolation knife switch to the insulating baffle.

[0009] As a preferred solution of the high-voltage knife switch with arc extinguishing function, the arc extinguishing device further includes a first driving member, which is transmission-connected to the nozzle to drive the nozzle to move.

[0010] As a preferred solution for a high-voltage knife switch with an arc extinguishing function, the first driving member includes a support plate, a motor, a first screw module, a guide plate, a first connecting plate, a first guide shaft and a second connecting plate, the support plate is arranged on the mounting seat, the guide plate is arranged on the support plate, and the guide plate is arranged parallel to the blade, the guide plate is provided with an arc groove along the second direction, one end of the second connecting plate is rotatably connected to the side of the guide plate away from the isolation knife switch, the end of the second connecting plate away from the guide plate is connected to the nozzle, the first screw module is arranged on the support plate, the first The driving end of the screw module is connected to the first connecting plate, and a first sliding groove is provided on the first connecting plate. The length of the first sliding groove extends along the first direction. One end of the first guide shaft is slidingly connected to the first sliding groove, and the other end of the first guide shaft passes through the arc groove and is rotatably connected to the second connecting plate, and the first guide shaft is slidably connected to the arc groove. The motor is transmission-connected to the first screw module to drive the first connecting plate to move along the vertical direction, so that the first guide shaft drives the second connecting plate to rotate around the guide plate, thereby causing the nozzle to swing around the guide plate.

[0011] As a preferred solution for a high-voltage knife switch with an arc extinguishing function, the high-voltage knife switch with an arc extinguishing function also includes a fixed seat and a support frame. The fixed seat is arranged above the isolating knife switch through the support frame, and the length of the fixed seat extends along the second direction. The insulating baffle is arranged on the fixed seat. The insulating baffle includes at least two insulator plates and a folding mechanism. Two adjacent insulator plates are rotatably connected, and the folding mechanism is arranged between the two adjacent insulator plates. The folding mechanism is used to drive the two adjacent insulator plates to fold or unfold each other.

[0012] As a preferred solution for a high-voltage knife switch with an arc extinguishing function, the insulating baffle includes two insulator plates, which are rotatably connected to the fixed seat, and the folding mechanism includes a mounting plate, a second driving member, a second guide shaft, a first connecting rod and a second connecting rod. The mounting plate is arranged on the fixed seat, and a guide groove is provided on the mounting plate. The length of the guide groove extends along the vertical direction. The second guide shaft is slidably connected in the guide groove. One end of the first connecting rod and the second connecting rod are respectively rotatably connected to the two insulator plates, and the other end of the first connecting rod and the second connecting rod away from the insulator plate is rotatably connected to the second guide shaft. The second driving member is arranged on the mounting plate, and the second driving member is transmission-connected to the second guide shaft to drive the second guide shaft to move along the vertical direction, thereby driving the first connecting rod and the second connecting rod to push the two insulator plates to fold or unfold with each other.

[0013] As a preferred solution for the high-voltage knife switch with arc extinguishing function, the high-voltage knife switch with arc extinguishing function also includes a support frame and a lifting device, the support frame is arranged on the mounting seat, and the support frame is spaced apart on the side of the isolating knife switch away from the arc extinguishing device along the second direction, the lifting device includes a third driving member and a lifting plate, the third driving member is arranged on the support frame, and the third driving member is transmission-connected to the lifting plate to drive the lifting plate to push the blade to move in the vertical direction and spaced apart from the second static contact.

[0014] As a preferred solution for a high-voltage knife switch with an arc extinguishing function, the support frame includes two support frames arranged at intervals along the first direction, and a second sliding groove is respectively provided on one side of the two support frames adjacent to each other. The length of the second sliding groove extends along the vertical direction, and guide wheels are respectively provided on both sides of the lifting plate along the first direction, and the guide wheels are slidably connected in the second sliding groove.

[0015] In a second aspect, a method for operating a high-voltage knife switch with an arc extinguishing function is provided, wherein the method comprises the following steps:

[0016] S10, pushing the blade of the isolation knife switch of the high-voltage knife switch with arc extinguishing function to disconnect the blade from the second static contact of the isolation knife switch, and forming an arc between the blade and the second static contact;

[0017] S20, starting the arc extinguishing device of the high-voltage knife switch with arc extinguishing function, so that the sulfur hexafluoride gas in the gas storage tank of the arc extinguishing device can pass through the connecting pipe of the arc extinguishing device and be sprayed toward the electric arc from the nozzle of the arc extinguishing device.

[0018] The beneficial effects of the present invention are as follows: through the arrangement of the arc extinguishing device, when the blade is disconnected from the second static contact, the sulfur hexafluoride gas in the gas tank can be ejected from the nozzle through the connecting pipe to extinguish the arc between the blade and the second static contact. The sulfur hexafluoride gas has good insulation and arc extinguishing effect, and can extinguish the arc between the blade and the second static contact in time, thereby improving the safety and reliability of the use of the isolation switch and the circuit, and can effectively ensure the operating safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0020] Figure 1 This is a schematic diagram of the structure of a high-voltage knife switch with arc extinguishing function according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a high-voltage knife switch with arc extinguishing function according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 Schematic diagram of the coordination between the arc extinguishing device and the isolating switch according to an embodiment of the present invention;

[0023] Figure 4 1 is a schematic structural diagram of an arc extinguishing device according to an embodiment of the present invention;

[0024] Figure 5 is a structural schematic diagram of an insulating baffle according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 An enlarged schematic diagram of point A;

[0026] Figure 7 2 is a schematic structural diagram of a lifting device according to an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Mounting seat; 2. Support insulator; 3. Isolating knife switch; 31. First static contact; 32. Second static contact; 33. Blade; 4. Arc extinguishing device; 41. Gas tank; 42. Connecting pipe; 43. Sprinkler; 44. First driving member; 441. Support plate; 442. Motor; 443. First screw module; 444. Guide plate; 4441. Arc groove; 445. First connecting plate; 4451. First sliding groove; 446. First guide shaft; 447. Second connecting plate; 5. Insulating baffle; 51. Insulator plate; 52. Folding mechanism; 5 21. Mounting plate; 5211. Guide groove; 522. Second driving member; 523. Second guide shaft; 524. First connecting rod; 525. Second connecting rod; 6. Fixed seat; 7. Support frame; 71. Support bracket; 711. Second sliding groove; 8. Lifting device; 81. Third driving member; 811. Hand wheel; 812. Fixed frame; 813. Rolling wheel; 814. Belt; 815. Guide rod; 8151. Guide part; 816. Second screw rod; 817. Fixed cylinder; 8171. Third sliding groove; 82. Lifting plate; 9. Guide wheel. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0030] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0033] like Figures 1 to 7 As shown, an embodiment of the present invention provides a high-voltage knife switch with an arc extinguishing function, including a mounting base 1, a supporting insulator 2, an isolating knife switch 3 and an arc extinguishing device 4, two supporting insulators 2 are arranged on the mounting base 1 along a first direction (the first direction is the X direction shown in the figure); the isolating knife switch 3 includes a first static contact 31, a second static contact 32 and a blade 33, the length of the blade 33 extends along the first direction, the first static contact 31 and the second static contact 32 are respectively arranged on the two supporting insulators 2, the blade 33 is rotatably connected to the first static contact 31, and the end of the blade 33 away from the first static contact 31 can abut or be spaced from the second static contact 32; the arc extinguishing device 4 includes a gas tank 41, a connecting pipe 42 and a nozzle 43, the gas tank 41 is arranged on the mounting base 1, and sulfur hexafluoride gas is stored in the gas tank 41, and the nozzle 43 is arranged on one side of the isolating knife switch 3 along the second direction (the second direction is the Y direction shown in the figure) through the connecting pipe 42, wherein the first direction is arranged perpendicular to the second direction.

[0034] It can be understood that the first static contact 31 and the second static contact 32 are respectively connected to two wires, and the end away from the first static contact 31 is disconnected from the second static contact 32 by rotating the blade 33, so as to achieve the disconnection of the circuit. At this time, a strong electric field will be generated between the end of the blade 33 away from the first static contact 31 and the second static contact 32. This electric field will excite and ionize the surrounding air molecules or electrons in the insulating medium, thereby forming an arc. The high-voltage knife switch with arc extinguishing function in this embodiment is provided with an arc extinguishing device 4, so that when the blade 33 is separated from the second static contact 32, the sulfur hexafluoride gas in the gas tank 41 can be ejected from the nozzle 43 through the connecting pipe 42 to extinguish the arc between the blade 33 and the second static contact 32. The sulfur hexafluoride gas has good insulation and arc extinguishing effect, and can extinguish the arc between the blade 33 and the second static contact 32 in time, thereby improving the safety and reliability of the use of the isolation knife switch 3 and the circuit, and can effectively ensure the operating safety of the operator, and effectively prevent the operator from being burned by high temperature, glare from strong light or accidental electric shock.

[0035] Furthermore, if Figure 1 and Figure 2As shown, the high-voltage knife switch with arc extinguishing function also includes an insulating baffle 5, which is spaced apart in the vertical direction above the isolating knife switch 3 (the vertical direction is the Z direction in the figure), and the end of the blade 33 away from the first static contact 31 can abut against the insulating baffle 5, and the first direction, the second direction and the vertical direction are arranged perpendicular to each other. By setting the insulating baffle 5, when the end of the blade 33 away from the first static contact 31 is lifted and disconnected from the second static contact 32, the blade 33 and the end away from the first static contact 31 can be shielded by the insulating baffle 5. The insulating baffle 5 has good insulation and heat resistance, and can reduce the electric field area of ​​the end of the blade 33 away from the first static contact 31, thereby reducing the formation and spread of the arc.

[0036] Furthermore, combined Figure 7 As shown, the high-voltage knife switch with arc extinguishing function also includes a support frame 7 and a lifting device 8. The support frame 7 is arranged on the mounting seat 1, and the support frame 7 is spaced apart on the side of the isolating knife switch 3 away from the arc extinguishing device 4 along the second direction. The lifting device 8 includes a third driving member 81 and a lifting plate 82. The third driving member 81 is arranged on the support frame 7. The third driving member 81 is transmission-connected to the lifting plate 82 to drive the lifting plate 82 to push the blade 33 to move in the vertical direction and space it from the second static contact 32, thereby realizing the disconnection of the blade 33 from the second static contact 32. It should be noted that the lifting plate 82 is arranged horizontally, and the lifting plate 82 pushes the blade 33 to move upward so that the end of the blade 33 away from the first static contact 31 can rotate around the first static contact 31 and abut against the insulating baffle 5. At this time, the blade 33 and the lifting plate 82 are arranged at an acute angle, so that when the third driving member 81 drives the lifting plate 82 to move downward, the end of the blade 33 away from the first static contact 31 can move downward due to its own gravity and abut against the second static contact 32 to achieve circuit connectivity.

[0037] Optionally, the support frame 7 includes two support brackets 71 spaced apart along the first direction, and a second sliding groove 711 is provided on each adjacent side of the two support brackets 71. The length of the second sliding groove 711 extends in the vertical direction. Guide wheels 9 are provided on both sides of the lifting plate 82 along the first direction, and the guide wheels 9 are slidably connected to the second sliding grooves 711. The sliding cooperation between the guide wheels 9 and the second sliding grooves 711 can effectively improve the guiding performance and smooth movement of the lifting plate 82.

[0038] Specifically, the third driving member 81 includes a hand-cranked wheel 811, a second screw rod module, a fixed frame 812, a rolling wheel 813, a belt 814 and a guide rod 815. The second screw rod module includes a second screw rod 816 and a fixed cylinder 817. The fixed cylinder 817 is arranged on the support frame 7. The second screw rod 816 is rotatably arranged in the fixed cylinder 817. The length of the second screw rod 816 extends in the vertical direction. The bottom end of the second screw rod 816 is connected to the hand-cranked wheel 811, and the top end of the second screw rod 816 is rotatably connected to the fixed frame 812. The rolling wheel 813 is rotatably arranged on the fixed frame 812. The rotation axis of the rolling wheel 813 extends along the first direction. One end of the belt 814 is connected to the support frame 7, and the other end of the belt 814 is connected to the lifting plate 82 via the rolling wheel 813. The frame 812 is provided with guide rods 815 on both sides along the first direction, and a guide part 8151 is protruded from the side adjacent to each other of the two guide rods 815. Two third sliding grooves 8171 are symmetrically provided on the outer periphery of the fixed cylinder 817, and the guide part 8151 is inserted into the third sliding groove 8171. The hand-cranked wheel 811 is rotated to rotate the second screw rod 816, so that the top end of the second screw rod 816 moves in the vertical direction, so that the rolling wheel 813 at the top end of the second screw rod 816 drives the belt 814 to drag the lifting plate 82 to move in the vertical direction, and the fixed frame 812 is slidably connected to the third sliding groove 8171 through the guide part 8151 of the guide rod 815, which can effectively ensure the movement guidance and stability of the fixed frame 812 and the rolling wheel 813 on the fixed frame 812.

[0039] In some embodiments, as Figure 1 and Figure 2 As shown, the nozzle 43 sprays in a third direction (the third direction is the Q direction in the figure), which is set at an acute angle to the vertical direction. The nozzle 43 can blow the sulfur hexafluoride gas through the isolation knife switch 3 toward the insulating baffle 5. By arranging the nozzle 43 at an angle, combined with the insulating baffle 5 blocking the sulfur hexafluoride gas, the diffusion of the sulfur hexafluoride gas can be reduced, ensuring the insulation and arc extinguishing effect between the blade 33 and the second static contact 32.

[0040] Of course, in order to further reduce the dissipation of sulfur hexafluoride, the insulating baffle 5 can be provided with stoppers on both sides along the second direction, and an arc extinguishing chamber is formed between the two stoppers and below the insulating baffle 5. The isolating knife switch 3 is located in the arc extinguishing chamber, and the nozzle 43 can blow the sulfur hexafluoride gas toward the isolating knife switch 3 in the arc extinguishing chamber, further reducing the dissipation of the sulfur hexafluoride gas.

[0041] Further, combined with Figure 3 and Figure 4As shown, the arc extinguishing device 4 further includes a first driving member 44, which is in driving connection with the nozzle 43 to move the nozzle 43. The first driving member 44 drives the nozzle 43 to expand the movement area of ​​the nozzle 43, thereby increasing the diffusion area of ​​the sulfur hexafluoride and ensuring the insulation performance of the side of the isolation switch 3.

[0042] Specifically, the first driving member 44 includes a support plate 441, a motor 442, a first screw module 443, a guide plate 444, a first connecting plate 445, a first guide shaft 446 and a second connecting plate 447. The support plate 441 is arranged on the mounting seat 1, the guide plate 444 is arranged on the support plate 441, and the guide plate 444 is arranged parallel to the blade 33. The guide plate 444 is provided with an arc groove 4441 along the second direction. One end of the second connecting plate 447 is rotatably connected to the side of the guide plate 444 away from the isolation knife gate 3, and the end of the second connecting plate 447 away from the guide plate 444 is connected to the nozzle 43. The first screw module 443 is arranged on the support plate 441, and the first screw module 4 The driving end of 43 is connected to the first connecting plate 445, and the first connecting plate 445 is provided with a first sliding groove 4451. The length of the first sliding groove 4451 extends along the first direction. One end of the first guide shaft 446 is slidably connected in the first sliding groove 4451, and the other end of the first guide shaft 446 passes through the arc groove 4441 and is rotatably connected to the second connecting plate 447, and the first guide shaft 446 is slidably connected to the arc groove 4441. The motor 442 is transmission-connected to the first screw module 443 to drive the first connecting plate 445 to move in the vertical direction, so that the first guide shaft 446 drives the second connecting plate 447 to rotate around the guide plate 444, thereby causing the nozzle 43 to swing around the guide plate 444.

[0043] It is understood that the first drive member 44 has a simple structure. The motor 442 drives the first screw module 443 to move vertically, thereby enabling the nozzle 43 to swing about the guide plate 444, thereby enabling the nozzle 43 to move horizontally and vertically, effectively increasing the movement trajectory of the nozzle 43 spraying sulfur hexafluoride gas, thereby increasing the spraying area of ​​the sulfur hexafluoride. Furthermore, the first drive member 44 drives the first screw module 443 to move the first guide shaft 446 to the lowest end of the arcuate groove 4441, thereby moving the end of the second connecting plate 447 away from the guide plate 444 downward to the lowest end, allowing the nozzle 43 to be stored adjacent to the mounting base 1. This prevents the isolation knife switch 3 from being too close to the nozzle 43 during normal connection and use, which could easily cause electric shock.

[0044] In other embodiments, Figure 1 、 Figure 2 、 Figure 5 and Figure 6As shown, the high-voltage knife switch with arc extinguishing function also includes a fixed seat 6 and a support frame 7. The fixed seat 6 is arranged above the isolation knife switch 3 through the support frame 7, and the length of the fixed seat 6 extends along the second direction. The insulating baffle 5 is arranged on the fixed seat 6. The insulating baffle 5 includes at least two insulator plates 51 and a folding mechanism 52. The two adjacent insulator plates 51 are rotatably connected, and a folding mechanism 52 is arranged between the two adjacent insulator plates 51. The folding mechanism 52 is used to drive the two adjacent insulator plates 51 to fold or unfold relative to each other. By splitting the insulating baffle 5 into multiple insulator plates 51 and using the folding mechanism 52 to drive the insulator plates 51 so that the insulator plates 51 can be folded and stored, the insulating baffle 5 is reduced from being exposed to wind and sun when idle, thereby increasing the service life of the insulating baffle 5. When the isolation knife switch 3 needs to be disconnected, the folding mechanism 52 drives the insulator plates 51 to unfold relative to each other and lay flat above the isolation knife switch 3.

[0045] Furthermore, the insulating baffle 5 includes two insulator plates 51, which are rotatably connected to the fixing seat 6. The folding mechanism 52 includes a mounting plate 521, a second driving member 522, a second guide shaft 523, a first connecting rod 524 and a second connecting rod 525. The mounting plate 521 is arranged on the fixing seat 6, and a guide groove 5211 is provided on the mounting plate 521. The length of the guide groove 5211 extends in the vertical direction. The second guide shaft 523 is slidably connected to the guide groove 5211. The first connecting rod 52 One end of the first and second connecting rods 524 and 525 is rotatably connected to the two insulator plates 51, respectively. The other ends of the first and second connecting rods 524 and 525, which are away from the insulator plates 51, are rotatably connected to the second guide shaft 523. A second driving member 522 is disposed on the mounting plate 521 and is in transmission connection with the second guide shaft 523 to drive the second guide shaft 523 to move vertically, thereby driving the first and second connecting rods 524 and 525 to push the two insulator plates 51 to fold or unfold relative to each other. The second driving member 522 can be a linear drive mechanism such as a pneumatic cylinder, an oil cylinder, or an electric cylinder.

[0046] For example, the two insulator plates 51 are in an unfolded horizontal state. When the isolating knife switch 3 is connected, the second driving member 522 drives the second guide shaft 523 to move downward along the length direction (i.e., the vertical direction) of the guide groove 5211, so as to drive the first connecting rod 524 and the second connecting rod 525 to pull the two insulator plates 51 away from one end of the fixed seat 6 and swing downward around the fixed seat 6, so that the two insulator plates 51 are folded into a vertical state for easy storage.

[0047] Furthermore, when the insulating baffle 5 includes four insulator plates 51, taking two first insulating plates and two second insulating plates as examples, the two first insulating plates are rotatably connected to the fixing base 6, and a folding mechanism 52 is provided between the two first insulating plates. A second insulating plate is rotatably connected to each of the two first insulating plates on the side away from the fixing base 6. A folding mechanism 52 is provided between the first and second insulating plates, and the driving direction of the folding mechanism 52 between the two first insulating plates is opposite to the folding direction of the insulating mechanism between the first and second insulating plates, to ensure that each insulating plate can be completely folded when stored. It should be noted that the insulating baffle 5 can be composed of five, six, seven, or even more insulator plates 51, with a folding mechanism 52 provided between each adjacent insulator plate 51, and the driving and folding directions of the adjacent folding mechanisms 52 are opposite.

[0048] An embodiment of the present invention further provides a method for operating a high-voltage knife switch with an arc extinguishing function, providing a high-voltage knife switch with an arc extinguishing function according to any of the above embodiments, comprising the following steps:

[0049] S10, pushing the blade 33 of the isolation knife switch 3 of the high-voltage knife switch with arc extinguishing function, so that the blade 33 is disconnected from the second static contact 32 of the isolation knife switch 3, and an arc is formed between the blade 33 and the second static contact 32;

[0050] S20, starting the arc extinguishing device 4 of the high-voltage knife switch with arc extinguishing function, so that the sulfur hexafluoride gas in the gas storage tank 41 of the arc extinguishing device 4 can pass through the connecting pipe 42 of the arc extinguishing device 4 and be sprayed from the nozzle 43 of the arc extinguishing device 4 to the arc.

[0051] The method is simple to operate. By setting the arc extinguishing device 4, when the blade 33 is disconnected from the second static contact 32, the sulfur hexafluoride gas in the gas tank 41 can be ejected from the nozzle 43 through the connecting pipe 42 to extinguish the arc between the blade 33 and the second static contact 32. The sulfur hexafluoride gas has good insulation and arc extinguishing effect, and can extinguish the arc between the blade 33 and the second static contact 32 in time, thereby improving the safety and reliability of the use of the isolation knife switch 3 and the circuit, and can effectively ensure the operating safety of the operator.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A high-voltage knife switch with arc extinguishing function, characterized in that: include: A mounting seat and a support insulator, wherein two support insulators are arranged on the mounting seat at intervals along a first direction; an isolating knife switch, the isolating knife switch comprising a first static contact, a second static contact, and a blade, the length of the blade extending along the first direction, the first static contact and the second static contact being respectively provided on the two supporting insulators, the blade being rotatably connected to the first static contact, and an end of the blade away from the first static contact being capable of abutting or being spaced apart from the second static contact; An arc extinguishing device, comprising a gas storage tank, a connecting pipe, and a nozzle, wherein the gas storage tank is disposed on the mounting seat and stores sulfur hexafluoride gas, and the nozzle is spaced apart from the isolating knife switch along the second direction by the connecting pipe; an insulating baffle, the insulating baffle being arranged above the isolating knife switch at intervals along the vertical direction, the end of the blade away from the first static contact being capable of abutting against the insulating baffle, and the first direction, the second direction and the vertical direction being arranged perpendicular to each other; A fixed seat and a support frame, wherein the fixed seat is arranged above the isolating knife switch through the support frame, and the length of the fixed seat extends along the second direction, the insulating baffle is arranged on the fixed seat, and the insulating baffle includes at least two insulator plates and a folding mechanism, two adjacent insulator plates are rotatably connected, and the folding mechanism is arranged between two adjacent insulator plates, and the folding mechanism is used to drive the two adjacent insulator plates to fold or unfold each other.

2. The high-voltage knife switch with arc extinguishing function according to claim 1 is characterized in that: The spraying direction of the nozzle is a third direction, and the third direction is set at an acute angle with the vertical direction. The nozzle can blow the sulfur hexafluoride gas toward the insulating baffle through the isolation knife switch.

3. The high-voltage knife switch with arc extinguishing function according to claim 2 is characterized in that: The arc extinguishing device further includes a first driving member, which is in transmission connection with the nozzle to drive the nozzle to move.

4. The high-voltage knife switch with arc extinguishing function according to claim 3 is characterized in that: The first driving member includes a support plate, a motor, a first screw module, a guide plate, a first connecting plate, a first guide shaft, and a second connecting plate. The support plate is arranged on the mounting seat, the guide plate is arranged on the support plate, and the guide plate is arranged parallel to the blade. The guide plate is provided with an arc groove running through it along the second direction. One end of the second connecting plate is rotatably connected to the side of the guide plate away from the isolation knife gate, and the end of the second connecting plate away from the guide plate is connected to the nozzle. The first screw module is arranged on the support plate, the driving end of the first screw module is connected to the first connecting plate, the first connecting plate is provided with a first sliding groove, the length of the first sliding groove extends along the first direction, one end of the first guide shaft is slidably connected to the first sliding groove, the other end of the first guide shaft passes through the arc groove and is rotatably connected to the second connecting plate, and the first guide shaft is slidably connected to the arc groove. The motor is transmission-connected to the first screw module to drive the first connecting plate to move along the vertical direction, so that the first guide shaft drives the second connecting plate to rotate around the guide plate, thereby causing the nozzle to swing around the guide plate.

5. The high-voltage knife switch with arc extinguishing function according to any one of claims 1 to 4, characterized in that: The insulating baffle includes two insulator plates, which are rotatably connected to the fixed seat. The folding mechanism includes a mounting plate, a second driving member, a second guide shaft, a first connecting rod and a second connecting rod. The mounting plate is arranged on the fixed seat, and a guide groove is provided on the mounting plate. The length of the guide groove extends along the vertical direction. The second guide shaft is slidably connected in the guide groove. One end of the first connecting rod and one end of the second connecting rod are respectively rotatably connected to the two insulator plates. The other end of the first connecting rod away from the insulator plate and the other end of the second connecting rod away from the insulator plate are both rotatably connected to the second guide shaft. The second driving member is arranged on the mounting plate. The second driving member is transmission-connected to the second guide shaft to drive the second guide shaft to move along the vertical direction, thereby driving the first connecting rod and the second connecting rod to push the two insulator plates to fold or unfold with each other.

6. The high-voltage knife switch with arc extinguishing function according to any one of claims 1 to 4, characterized in that: It also includes a support frame and a lifting device, the support frame is arranged on the mounting seat, and the support frame is spaced apart on the side of the isolating knife switch away from the arc extinguishing device along the second direction, the lifting device includes a third driving member and a lifting plate, the third driving member is arranged on the support frame, and the third driving member is transmission-connected to the lifting plate to drive the lifting plate to push the blade to move in the vertical direction and spaced apart from the second static contact.

7. The high-voltage knife switch with arc extinguishing function according to claim 6, characterized in that: The support frame includes two support frames arranged at intervals along the first direction, and a second sliding groove is respectively provided on one side of the two support frames adjacent to each other, and the length of the second sliding groove extends along the vertical direction. The lifting plate is respectively provided with guide wheels on both sides along the first direction, and the guide wheels are slidably connected to the second sliding groove.

8. A method for operating a high-voltage knife switch with an arc extinguishing function, using the high-voltage knife switch with an arc extinguishing function according to any one of claims 1 to 7, comprising the following steps: S10, pushing the blade of the isolation knife switch of the high-voltage knife switch with arc extinguishing function to disconnect the blade from the second static contact of the isolation knife switch, and forming an arc between the blade and the second static contact; S20, starting the arc extinguishing device of the high-voltage knife switch with arc extinguishing function, so that the sulfur hexafluoride gas in the gas storage tank of the arc extinguishing device can pass through the connecting pipe of the arc extinguishing device and be sprayed toward the electric arc from the nozzle of the arc extinguishing device.

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