A device for preventing accidental opening of a high-voltage switchgear

Abstract

The present invention discloses an anti-misoperation opening device for a high-voltage switch cabinet, which relates to the technical field of high-voltage switch cabinets and includes a main air switch and a plurality of branch air switches. The number of the branch air switches is several. The main air switch is fixedly connected to one of the branch air switches, and adjacent two branch air switches are fixedly connected. In this anti-misoperation opening device for a high-voltage switch cabinet, by setting a limiting mechanism, when the main air switch and the branch air switches are opened, the main air switch needs to be opened first, and then the branch air switches can be opened. When the main air switch and the branch air switches are closed, all the branch air switches need to be closed before the main air switch can be closed. Thereby, the generation of instantaneous current impact when the main air switch is opened can be reduced, and at the same time, when the main air switch cuts off the current, the branch air switches can be prevented from generating electric arcs due to the sudden disconnection of the load.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switch cabinets, and particularly to an anti-misopening device for high-voltage switch cabinets. Background Technique

[0002] The switch cabinet is the end device of the power distribution system. In the existing technology, as more and more electrical components, wires and cables need to be accommodated inside the switch cabinet, the circuits in the switch cabinet are becoming more and more complex, and it is often necessary for personnel to carry out maintenance. During maintenance, it is very easy to accidentally touch the switch.

[0003] In a high-voltage switch cabinet, there is a main air switch and multiple sub-air switches installed. When personnel carry out maintenance, there will not only be a situation of accidentally opening the air switch, but also a situation of incorrect opening. In the existing technology, there is often an operation of first opening the sub-air switch and then opening the main air switch. This operation will have an instantaneous current impact phenomenon, which may cause the risk of damage to the air switch. If the instantaneous current causes the internal insulation of the equipment to break down, the metal shell may be electrified. If the grounding protection fails, electric shock accidents may occur when people come into contact with it.

[0004] Combining the above problems, we will find that the existing air switches on the market are very difficult to avoid the above-mentioned problems simultaneously when in use, and even if they can be solved, they need to be solved with the cooperation of external tools, thus unable to achieve the desired effect. Therefore, we propose an anti-misopening device for high-voltage switch cabinets. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-misopening device for high-voltage switch cabinets to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An anti-misopening device for high-voltage switch cabinets includes a main air switch and sub-air switches. The number of the sub-air switches is several. The main air switch is fixedly connected to one of the sub-air switches, and adjacent two of the sub-air switches are fixedly connected. A rotating dial is rotatably connected to the inner cavities of both the main air switch and the sub-air switches. A limiting mechanism for cooperating with the rotating dial is jointly arranged in the inner cavities of the main air switch and the sub-air switches. A clamping mechanism for cooperating with the limiting mechanism is arranged in the inner cavity of the rotating dial.

[0007] Preferably, the limiting mechanism includes a first sliding cavity and a second sliding cavity formed in the inner cavities of the main air switch and the branch air switch. A first sliding rod is slidably connected to the inner cavity of the first sliding cavity. A first clamping rod and a first extrusion block are fixedly connected to the surface of the first sliding rod. The number of the first clamping rods is several. A second sliding rod is slidably connected to the inner cavity of the second sliding cavity. A second clamping rod and a second extrusion block are fixedly connected to the surface of the second sliding rod. The number of the second extrusion blocks is several. Fixed rings are fixedly connected to the surfaces of the first sliding rod and the second sliding rod. First springs are movably sleeved on the surfaces of the first sliding rod and the second sliding rod. One end of each first spring is fixedly connected to one side of the corresponding fixed ring, and the other end of each first spring is fixedly connected to the inner wall of the branch air switch. Two arc-shaped plates are movably connected to the surface of the rotary dial, and through holes are formed in one side of each arc-shaped plate.

[0008] Preferably, T-shaped grooves are formed in the inner walls of the first sliding cavity and the second sliding cavity. T-shaped rods are slidably connected to the inner cavities of the T-shaped grooves. The surfaces of the first sliding rod and the second sliding rod are respectively fixedly connected to the surfaces of the two T-shaped rods.

[0009] Preferably, the clamping mechanism includes a cavity formed in the inner cavity of the rotary dial. Two moving blocks are slidably connected to the inner cavity of the cavity. Limiting blocks are fixedly connected to the opposite sides of the two moving blocks. Limiting grooves adapted to the limiting blocks are formed in the surface of the arc-shaped plate. An adjusting block is slidably connected to the inner cavity of the rotary dial.

[0010] Preferably, a pressing block is slidably connected to the inner cavity of the rotary dial. A third spring is movably sleeved on the surface of the pressing block. One end of the third spring is fixedly connected to the surface of the pressing block, and the other end of the third spring is fixedly connected to the inner wall of the rotary dial. One ends of the pressing block and the adjusting block are both trapezoidally arranged.

[0011] Preferably, the inner cavities of the main air switch and the sub-air switch are both provided with two wiring terminals connected to external cables, and the inner cavities of the main air switch and the sub-air switch are both provided with an adjusting cavity, one of the wiring terminals is fixedly connected to a magnetic tripping coil, a magnetic core is provided at the center position of the magnetic tripping coil, one end of the magnetic tripping coil is fixedly connected to a static contact, and the other wiring terminal is fixedly connected to a moving contact, the inner cavity of the adjusting cavity is rotatably connected to a toggle block, and the surface of the toggle block is provided with a fourth spring and a fifth spring, one end of the fourth spring and the fifth spring are both fixedly connected to the surface of the toggle block, and the other end of the fourth spring and the other end of the fifth spring 317 are both fixedly connected to the inner wall of the adjusting cavity, the surface of the magnetic core is fixedly connected to a connecting rod, one side of the adjusting block is fixedly connected to an inclined rod used in conjunction with the connecting rod, and a seventh spring is provided on the surface movable sleeve of the inclined rod, one end of the seventh spring is fixedly connected to the inner wall of the rotating toggle block, and the other end of the seventh spring is fixedly connected to one side of the inclined rod.

[0012] Preferably, one end of the moving block is fixedly connected to a guide rod, the surface of the guide rod is slidably connected to the inner wall of the cavity, a sixth spring is movably sleeved on the surface of the guide rod, one end of the sixth spring is fixedly connected to the inner wall of the cavity, and the other end of the sixth spring is fixedly connected to the moving block.

[0013] Preferably, the inner cavity of the rotating block in the main air switch is slidably connected to two adjusting rods, the surfaces of the two adjusting rods are provided with grooves, the inner cavity of the rotating block is slidably connected to a card block, one side of the card block is fixedly connected to an elastic sheet, one end of the elastic sheet is fixedly connected to the inner wall of the rotating block, and the main air switch is provided with a card hole used in conjunction with the card block.

[0014] Preferably, the surfaces of the main air switch and the sub-air switch are both slidably connected to a ceramic rod, the inner cavity of the ceramic rod is slidably connected to a marking rod, one end of the marking rod is fixedly connected to a tension spring, one end of the tension spring is fixedly connected to the inner wall of the ceramic rod, the surfaces of the main air switch and the sub-air switch are both fixedly connected to a support plate, the inner cavity of the support plate is slidably connected to the surface of the ceramic rod, the surface of the ceramic rod is fixedly connected to a limiting ring, the surface of the ceramic rod is movablely sleeved with a second spring, one end of the second spring is fixedly connected to the limiting ring, and the other end of the second spring is fixedly connected to the support plate.

[0015] Preferably, a rubber sheet is fixedly connected to the surface of the arc-shaped plate, and the first sliding cavity and the second sliding cavity are both used in conjunction with the surface of the rubber sheet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting a limiting mechanism in the present invention, when the main air switch and the branch air switches are opened, the main air switch needs to be opened first, and then the branch air switches can be opened. When closing the main air switch and the branch air switches, all the branch air switches need to be closed before the main air switch can be closed. This can reduce the generation of instantaneous current impact when the main air switch is opened, and at the same time avoid the generation of electric arcs in the branch air switches due to sudden disconnection of the load when the main air switch cuts off the current.

[0018] 2. By setting a clamping mechanism in the present invention, when the main air switch and the branch air switches are open-circuited, the current in the magnetic tripping coil will increase, causing the magnetic core to move. The magnetic core drives the connecting rod to first squeeze the inclined rod, which in turn causes the adjusting block to squeeze the moving block, causing the limiting block to disengage from the inner cavity of the limiting groove, thus canceling the limitation on the arc-shaped plate and preventing the limiting mechanism from affecting the tripping of the main air switch and the branch air switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the main air switch of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the rotary dial and the inclined rod of the present invention;

[0022] Figure 4 is a schematic sectional view of the branch air switch of the present invention;

[0023] Figure 5 is of the present invention Figure 4 partial enlarged view at A in;

[0024] Figure 6 is a schematic diagram of the structure of the static contact and the moving contact of the present invention;

[0025] Figure 7 is an exploded schematic diagram of the ceramic rod and the marking rod of the present invention;

[0026] Figure 8 is a schematic diagram of the structure of the rotary dial and the first sliding rod of the present invention;

[0027] Figure 9 is a schematic diagram of the structure of the first sliding rod and the first clamping rod of the present invention;

[0028] Figure 10 is a schematic sectional view of the main air switch, the branch air switch and the second sliding rod of the present invention;

[0029] Figure 11It is a cross-sectional schematic diagram of the main air switch, the branch air switch and the first sliding rod of the present invention;

[0030] Figure 12 It is a cross-sectional schematic diagram of the rotary dial block of the present invention;

[0031] Figure 13 For the present invention Figure 12 A partial enlarged view of point B in the middle;

[0032] Figure 14 For the present invention Figure 12 A partial enlarged view of point C in the middle;

[0033] Figure 15 For the present invention Figure 12 A partial enlarged view of point D in the middle;

[0034] Figure 16 It is a cross-sectional schematic diagram of the rotary dial block and the inclined rod of the present invention;

[0035] Figure 17 It is a structural schematic diagram of the oblique rod, the seventh spring and the adjustment block of the present invention;

[0036] Figure 18 It is a schematic diagram of the structure of the arc plate and the rubber sheet of the present invention;

[0037] Figure 19 For the present invention Figure 8 A partial enlarged view of point E in the middle.

[0038] In the figure: 1, main air switch; 11, air switch; 12, rotary dial block; 2, limit mechanism; 201, first sliding cavity; 202, second sliding cavity; 203, first sliding rod; 204, first clamping rod; 205, first extrusion block; 206, second sliding rod; 207, second clamping rod; 208, second extrusion block; 209, fixing ring; 210, first spring; 211, arc plate; 212, through hole; 213, T-slot; 214, T-rod; 3, locking mechanism; 301, cavity; 302, moving block; 303, limit block; 304, limit slot; 305, adjustment block; 306, seventh spring; 307, pressing block; 308, third spring; 309, terminal; 310, adjusting chamber; 311, magnetic tripping coil; 312, magnetic core; 313, static contact; 314, moving contact; 315, toggle block; 316, fourth spring; 317, fifth spring; 318, connecting rod; 319, inclined rod; 320, guide rod; 321, sixth spring; 322, adjusting rod; 323, groove; 324, block; 325, elastic sheet; 326, card hole; 327, rubber sheet; 401, ceramic rod; 402, marking rod; 403, tension spring; 404, support plate; 405, limit ring; 406, second spring. DETAILED DESCRIPTION

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1: Please refer to Figures 1 - 18 , the present invention provides a technical solution: a device for preventing accidental opening of a high-voltage switch cabinet, including a main air switch 1 and branch air switches 11. The number of branch air switches 11 is several. The main air switch 1 is fixedly connected to one of the branch air switches 11, and adjacent two branch air switches 11 are fixedly connected. Rotating sliders 12 are rotatably connected to the inner cavities of the main air switch 1 and the branch air switches 11. A limiting mechanism 2 for cooperating with the rotating sliders 12 is jointly arranged in the inner cavities of the main air switch 1 and the branch air switches 11. A clamping mechanism 3 for cooperating with the limiting mechanism 2 is arranged in the inner cavity of the rotating slider 12.

[0041] The limiting mechanism 2 includes a first sliding cavity 201 and a second sliding cavity 202 opened in the inner cavities of the main air switch 1 and the branch air switches 11. It should be noted that the second sliding cavity 202 in the main air switch 1 communicates with the second sliding cavities 202 in several branch air switches 11, and the first sliding cavity 201 in the main air switch 1 communicates with the first sliding cavities 201 in several branch air switches 11. A first sliding rod 203 is slidably connected to the inner cavity of the first sliding cavity 201. A first clamping rod 204 and a first extrusion block 205 are fixedly connected to the surface of the first sliding rod 203. The number of the first clamping rods 204 is several. A second sliding rod 206 is slidably connected to the inner cavity of the second sliding cavity 202. A second clamping rod 207 and a second extrusion block 208 are fixedly connected to the surface of the second sliding rod 206. The number of the second extrusion blocks 208 is several. Fixed rings 209 are fixedly connected to the surfaces of the first sliding rod 203 and the second sliding rod 206. First springs 210 are movably sleeved on the surfaces of the first sliding rod 203 and the second sliding rod 206. One end of each first spring 210 is fixedly connected to one side of the corresponding fixed ring 209, and the other end of each first spring 210 is fixedly connected to the inner wall of the branch air switch 11. Two arc-shaped plates 211 are movably connected to the surface of the rotary knob 12. A through hole 212 is opened on one side of each arc-shaped plate 211. By providing the limiting mechanism 2, when both the main air switch 1 and the branch air switches 11 are in the closed state, the arc-shaped plate 211 in the main air switch 1 will be stuck in the first sliding cavity 201 and squeeze the first extrusion block 205, and at this time the first clamping rod 204 is stuck in the through hole 212, and at this time the rotary knob 12 of the branch air switch 11 cannot be opened. It is necessary to first open the rotary knob 12 of the main air switch 1 so that the arc-shaped plate 211 in the main air switch 1 is stuck in the second sliding cavity 202, and then the arc-shaped plate 211 in the branch air switch 11 is stuck in the second sliding cavity 202 and squeezes the second extrusion block 208, so that the second sliding rod 206 moves. At this time, the second clamping rod 207 will be stuck in the through hole 212 of the arc-shaped plate 211 in the main air switch 1, realizing the limitation of the arc-shaped plate 211 in the main air switch 1, so that when closing the main air switch 1 and the branch air switches 11, the branch air switches 11 are closed first.

[0042] T-shaped grooves 213 are opened on the inner walls of the first sliding cavity 201 and the second sliding cavity 202. T-shaped rods 214 are slidably connected to the inner cavities of the T-shaped grooves 213. The surfaces of the first sliding rod 203 and the second sliding rod 206 are respectively fixedly connected to the surfaces of the two T-shaped rods 214. By providing the combined use of the T-shaped grooves 213 and the T-shaped rods 214, when moving the first sliding rod 203 and the second sliding rod 206, the T-shaped rods 214 will move in the inner cavities of the T-shaped grooves 213, avoiding the deviation of the first sliding rod 203 and the second sliding rod 206 during movement, thereby realizing the guiding effect on the first sliding rod 203 and the second sliding rod 206.

[0043] In the inner cavity of the rotary block 12 in the main air switch 1, two adjusting rods 322 are slidably connected. Grooves 323 are formed on the surfaces of the two adjusting rods 322. A clamping block 324 is slidably connected in the inner cavity of the rotary block 12. One side of the clamping block 324 is fixedly connected with an elastic piece 325. One end of the elastic piece 325 is fixedly connected with the inner wall of the rotary block 12. A clamping hole 326 which is used in cooperation with the clamping block 324 is formed in the inner wall of the main air switch 1. By setting the adjusting rods 322, the clamping block 324, the elastic piece 325 and the clamping hole 326 to be used in cooperation, when the rotary block 12 in the main air switch 1 is in the closed state, the clamping block 324 is stuck in the clamping hole 326. Since the number of the adjusting rods 322 is two, it is necessary to move the two adjusting rods 322 simultaneously. When the adjusting rods 322 are moved until the grooves 323 are aligned with the clamping block 324, the elastic piece 325 drives the clamping block 324 to move in the reverse direction, so that the two clamping blocks 324 are simultaneously disengaged from the clamping hole 326, so that the rotary block 12 in the main air switch 1 can rotate, avoiding the rotary block 12 in the main air switch 1 being collided and opened.

[0044] The specific implementation manner of this embodiment is as follows: when both the main air switch 1 and the branch air switch 11 are in the closed state, the arc-shaped plate 211 in the main air switch 1 will be stuck in the first sliding cavity 201 and squeeze the first extrusion block 205, and at this time, the first clamping rod 204 is stuck in the through hole 212. At this time, the rotary block 12 of the branch air switch 11 cannot be opened. It is necessary to open the rotary block 12 of the main air switch 1 first, so that the arc-shaped plate 211 in the main air switch 1 is stuck in the second sliding cavity 202, and then the arc-shaped plate 211 in the branch air switch 11 is stuck in the second sliding cavity 202 and squeeze the second extrusion block 208, so that the second sliding rod 206 moves. At this time, the second clamping rod 207 will be stuck in the through hole 212 of the arc-shaped plate 211 in the main air switch 1, realizing the limit of the arc-shaped plate 211 in the main air switch 1, so that when closing the main air switch 1 and the branch air switch 11, the branch air switch 11 is closed first. When the rotary block 12 in the main air switch 1 is in the closed state, the clamping block 324 is stuck in the clamping hole 326. Since the number of the adjusting rods 322 is two, it is necessary to move the two adjusting rods 322 simultaneously. When the adjusting rods 322 are moved until the grooves 323 are aligned with the clamping block 324, the elastic piece 325 drives the clamping block 324 to move in the reverse direction, so that the two clamping blocks 324 are simultaneously disengaged from the clamping hole 326, so that the rotary block 12 in the main air switch 1 can rotate, avoiding the rotary block 12 in the main air switch 1 being collided and opened.

[0045] Example 2: Please refer to Figures 1 - 18, the present invention provides a technical solution: a device for preventing accidental opening of a high-voltage switchgear. The present invention makes corresponding improvements to the technical problems mentioned in the background art.

[0046] The engaging mechanism 3 includes a cavity 301 formed in the inner cavity of the rotary dial 12. Two moving blocks 302 are slidably connected in the inner cavity of the cavity 301. Limiting blocks 303 are fixedly connected to the opposite sides of the two moving blocks 302. Limiting grooves 304 for cooperating with the limiting blocks 303 are formed on the surface of the arc-shaped plate 211. It should be noted that one end of the arc-shaped plate 211 is located in the cavity 301. An adjusting block 305 is slidably connected in the inner cavity of the rotary dial 12. By providing the engaging mechanism 3, when both the main air switch 1 and the branch air switch 11 are in the open state, when the main air switch 1 and the branch air switch 11 trip, the adjusting block 305 is moved, so that the adjusting block 305 squeezes the moving blocks 302, causing the two moving blocks 302 to move in opposite directions. At this time, the moving blocks 302 drive the limiting blocks 303 to disengage from the limiting grooves 304, so that the arc-shaped plate 211 can be separated from the rotary dial 12, avoiding the influence of the limiting mechanism 2 on the tripping.

[0047] An abutting block 307 is slidably connected in the inner cavity of the rotary dial 12. A third spring 308 is movably sleeved on the surface of the abutting block 307. One end of the third spring 308 is fixedly connected to the surface of the abutting block 307, and the other end of the third spring 308 is fixedly connected to the inner wall of the rotary dial 12. One end of the abutting block 307 and one end of the adjusting block 305 are both trapezoidally arranged. By providing the cooperation of the abutting block 307 and the third spring 308, when the main air switch 1 and the branch air switch 11 are in the closed state, but when the branch air switch 11 needs to be opened and repaired, a tool can be used to squeeze the abutting block 307, causing the two moving blocks 302 to move in opposite directions, so that the arc-shaped plate 211 can be separated from the rotary dial 12, thus achieving the effect of the main air switch 1 being closed and the branch air switch 11 being opened, avoiding affecting the repair of the branch air switch 11.

[0048] Both the inner cavities of the main air switch 1 and the branch air switch 11 are provided with two terminal blocks 309 connected to external cables. An adjustment cavity 310 is provided in the inner cavities of both the main air switch 1 and the branch air switch 11. One of the terminal blocks 309 is fixedly connected to a magnetic trip coil 311. A magnetic core 312 is arranged at the central position of the magnetic trip coil 311. It should be noted that a compression spring is sleeved on the surface of the magnetic core 312 for resetting the magnetic core 312. One end of the compression spring is fixed to the inner cavity of the adjustment cavity 310, and the other end of the compression spring is fixed to the magnetic core 312. The magnetic core 312 is slidably connected to the inner cavity of the adjustment cavity 310. One end of the magnetic trip coil 311 is fixedly connected to a static contact 313, and the other terminal block 309 is fixedly connected to a moving contact 314. A toggle block 315 is rotatably connected to the inner cavity of the adjustment cavity 310. It should be noted that the toggle block 315 is connected to the rotary dial 12 through a pull rod. The pull rod is rotatably connected to the rotary dial 12 and the toggle block 315, so that when the toggle block 315 rotates, it drives the rotary dial 12 to rotate through the pull rod. The surface of the toggle block 315 is provided with a fourth spring 316 and a fifth spring 317. One ends of the fourth spring 316 and the fifth spring 317 are fixedly connected to the surface of the toggle block 315, and the other ends of the fourth spring 316 and the fifth spring 317 are fixedly connected to the inner wall of the adjustment cavity 310. A connecting rod 318 is fixedly connected to the surface of the magnetic core 312. One side of the adjustment block 305 is fixedly connected to an inclined rod 319 that cooperates with the connecting rod 318. A seventh spring 306 is movably sleeved on the surface of the inclined rod 319. One end of the seventh spring 306 is fixedly connected to the inner wall of the rotary dial 12, and the other end of the seventh spring 306 is fixedly connected to one side of the inclined rod 319. By setting the magnetic trip coil 311, the magnetic core 312, the static contact 313, the moving contact 314, the connecting rod 318 and the inclined rod 319 to cooperate, when the main air switch 1 and the branch air switch 11 are in the on state and the main air switch 1 has a circuit break, the current in the magnetic trip coil 311 will increase, causing the magnetic core 312 to move under the action of the magnetic field, so that the magnetic core 312 drives the connecting rod 318 to move. The movement of the connecting rod 318 will squeeze the inclined rod 319. At this time, the inclined rod 319 moves downward, so that the inclined rod 319 drives the adjustment block 305 to move, thus achieving the effect of unlocking the arc-shaped plate 211. When a circuit break occurs, the main air switch 1 can complete the tripping action. It should be noted that an arc extinguishing mechanism is also provided in the inner cavities of the main air switch 1 and the branch air switch 11, including an arc extinguishing chamber and an arc guiding plate, with a metal grid structure inside, which uses air medium to quickly cool and divide the arc to prevent the equipment from being damaged by high temperature. This is an existing technology and will not be elaborated too much. It should also be noted that the connecting rod 318 is composed of an L-shaped rod, a telescopic rod, a return spring and a pressing rod. Among them, one end of the L-shaped rod is fixedly connected to one end of the telescopic rod, and the other end of the L-shaped rod is fixedly connected to the surface of the magnetic core 312.The telescopic end of the telescopic rod is fixedly connected to the extrusion rod, and the reset spring is movably sleeved on the surface of the telescopic rod. The two ends of the reset spring are respectively fixedly connected to the extrusion rod and the L rod, and the elastic coefficient of the reset spring is greater than the elastic coefficient of the seventh spring 306. When the magnetic core 312 moves downward, it will drive the connecting rod 318 to move downward, so that the extrusion rod squeezes the inclined rod 319. At this time, the seventh spring 306 is compressed first, so that the arc plate 211 can be separated. When the magnetic core 312 continues to move downward, the reset spring is compressed, and the toggle block 315 squeezes the moving contact 314, thereby realizing the tripping action.

[0049] One end of the moving block 302 is fixedly connected to a guide rod 320, the surface of the guide rod 320 is slidably connected to the inner wall of the cavity 301, and a sixth spring 321 is movably sleeved on the surface of the guide rod 320, one end of the sixth spring 321 is fixedly connected to the inner wall of the cavity 301, and the other end of the sixth spring 321 is fixedly connected to the moving block 302. By setting the coordinated use of the guide rod 320 and the sixth spring 321, when the adjustment block 305 squeezes the two moving blocks 302, the movement of the moving block 302 will squeeze the sixth spring 321, causing the sixth spring 321 to be deformed by force, and when the adjustment block 305 cancels the squeezing of the moving block 302, the moving block 302 will move in the opposite direction under the action of the sixth spring 321, causing the moving block 302 to reset.

[0050] A rubber sheet 327 is fixedly connected to the surface of the arc plate 211, and the first sliding cavity 201 and the second sliding cavity 202 are used in conjunction with the surface of the rubber sheet 327. By setting the rubber sheet 327, when the arc plate 211 moves to the inner cavity of the first sliding cavity 201 and the second sliding cavity 202, the rubber sheet 327 will be in close contact with the inner walls of the first sliding cavity 201 and the second sliding cavity 202. When the arc plate 211 is separated from the rotating dial block 12, the rubber sheet 327 will still be located in the first sliding cavity 201 and the second sliding cavity 202 to prevent the arc plate 211 from falling.

[0051] The specific implementation manner of this embodiment is as follows: When the main air switch 1 and the branch air switch 11 are in the on state, if the main air switch 1 has a break in the circuit, the current in the magnetic tripping coil 311 will increase, causing the magnetic core 312 to move under the action of the magnetic field. As a result, the magnetic core 312 drives the connecting rod 318 to move. The movement of the connecting rod 318 squeezes the inclined rod 319. At this time, the inclined rod 319 moves downward, causing the inclined rod 319 to drive the adjusting block 305 to move, so that the adjusting block 305 squeezes the moving block 302, making the two moving blocks 302 move in opposite directions. At this time, the moving block 302 drives the limiting block 303 to disengage from the limiting groove 304, so that the arc-shaped plate 211 can be separated from the rotary dial 12, avoiding the influence of the limiting mechanism 2 on the tripping, and thus achieving the effect of unlocking the arc-shaped plate 211. When a circuit break occurs, the main air switch 1 can complete the tripping action. When the main air switch 1 and the branch air switch 11 are in the off state, but when it is necessary to open the branch air switch 11 and perform maintenance on the branch air switch 11, a tool can be used to squeeze the pressing block 307, making the two moving blocks 302 move in opposite directions, so that the arc-shaped plate 211 can be separated from the rotary dial 12, thus achieving the effect of keeping the main air switch 1 off and opening the branch air switch 11, avoiding affecting the maintenance of the branch air switch 11. It should be noted that the elastic coefficients of the third spring 308 and the seventh spring 306 are both smaller than that of the sixth spring 321, and the elastic coefficient of the return spring is greater than that of the sixth spring 321.

[0052] Embodiment 3: Please refer to Figures 1 - 18 , the present invention provides a technical solution: a device for preventing mis-opening of a high-voltage switch cabinet, and the present invention makes corresponding improvements to the technical problems mentioned in the background art.

[0053] The surfaces of the main air switch 1 and the branch air switch 11 are both slidably connected with ceramic rods 401. It should be noted that one end of the ceramic rod 401 penetrates into the adjustment cavity 310. A marking rod 402 is slidably connected inside the ceramic rod 401. One end of the marking rod 402 is fixedly connected with a tension spring 403. One end of the tension spring 403 is fixedly connected with the inner wall of the ceramic rod 401. The surfaces of the main air switch 1 and the branch air switch 11 are both fixedly connected with support plates 404. The inner cavity of the support plate 404 is slidably connected with the surface of the ceramic rod 401. A limit ring 405 is fixedly connected to the surface of the ceramic rod 401. A second spring 406 is movably sleeved on the surface of the ceramic rod 401. One end of the second spring 406 is fixedly connected with the limit ring 405. The other end of the second spring 406 is fixedly connected with the support plate 404. By setting the combined use of the ceramic rod 401 and the marking rod 402, when closing the main air switch 1 and the branch air switch 11, the marking rod 402 is moved, so that the marking rod 402 and the tension spring 403 drive the ceramic rod 401 to move, so that the ceramic rod 401 can move between the moving contact 314 and the static contact 313. If there is a large resistance to the ceramic rod 401, the distance between the marking rod 402 and the ceramic rod 401 changes, so that it can be judged that the gap between the moving contact 314 and the static contact 313 is small or there is a contact state, reducing the occurrence of potential safety hazards. It should be noted that the elastic coefficient of the tension spring 403 is greater than that of the second spring 406, and colored marking stickers are provided on the surfaces of the ceramic rod 401 and the marking rod 402. When the ceramic rod 401 reaches the marking position first, it means that there is no obstacle when the ceramic rod 401 moves, indicating that the moving contact 314 and the static contact 313 are separated. When the marking rod 402 reaches the marking position first, it means that there is an obstacle when the ceramic rod 401 moves, indicating that the moving contact 314 and the static contact 313 are not completely disconnected.

[0054] The specific implementation of this embodiment is as follows: If the fourth spring 316 and the fifth spring 317 are aged, fatigued or blocked by foreign objects, resulting in the moving contact 314 being unable to completely separate from the static contact 313. Although the prior art uses an indicator light to make a judgment, if the indicator light fails, it is impossible to determine that the moving contact 314 and the static contact 313 are in a contact state. Therefore, when closing the main air switch 1 and the branch air switch 11, the marking rod 402 can be moved, so that the marking rod 402 and the tension spring 403 drive the ceramic rod 401 to move, and one end of the ceramic rod 401 moves between the moving contact 314 and the static contact 313. When the ceramic rod 401 reaches the marking position first, it indicates that there is no obstruction when the ceramic rod 401 moves, indicating that the moving contact 314 and the static contact 313 are separated. When the marking rod 402 reaches the marking position first, it indicates that there is an obstruction when the ceramic rod 401 moves, indicating that the moving contact 314 and the static contact 313 are not completely disconnected. Thus, it can be determined that the gap between the moving contact 314 and the static contact 313 is small or there is a contact state, reducing the occurrence of potential safety hazards.

[0055] It should be noted that in this article, relational terms such as first and second are only used 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 "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing mis-opening of a high-voltage switchgear, comprising a main air switch (1) and branch air switches (11), wherein the number of the branch air switches (11) is several, and it is characterized in that: The main air switch (1) is fixedly connected to one of the branch air switches (11), and adjacent branch air switches (11) are fixedly connected. A rotating dial (12) is rotatably connected to the inner cavities of the main air switch (1) and the branch air switches (11). A limiting mechanism (2) for cooperating with the rotating dial (12) is jointly arranged in the inner cavities of the main air switch (1) and the branch air switches (11). A clamping mechanism (3) for cooperating with the limiting mechanism (2) is arranged in the inner cavity of the rotating dial (12). The limiting mechanism (2) includes a first sliding cavity (201) and a second sliding cavity (202) opened in the inner cavities of the main air switch (1) and the branch air switches (11). A first sliding rod (203) is slidably connected to the inner cavity of the first sliding cavity (201). A first clamping rod (204) and a first extrusion block (205) are fixedly connected to the surface of the first sliding rod (203). The number of the first clamping rods (204) is several. A second sliding rod (206) is slidably connected to the inner cavity of the second sliding cavity (202). A second clamping rod (207) and a second extrusion block (208) are fixedly connected to the surface of the second sliding rod (206). The number of the second extrusion blocks (208) is several. Fixing rings (209) are fixedly connected to the surfaces of the first sliding rod (203) and the second sliding rod (206). First springs (210) are movably sleeved on the surfaces of the first sliding rod (203) and the second sliding rod (206). One end of each first spring (210) is fixedly connected to one side of the corresponding fixing ring (209), and the other end of each first spring (210) is fixedly connected to the inner wall of the branch air switch (11). Two arc-shaped plates (211) are movably connected to the surface of the rotating dial (12). A through hole (212) is opened on one side of each arc-shaped plate (211). The clamping mechanism (3) includes a cavity (301) opened in the inner cavity of the rotating dial (12). Two moving blocks (302) are slidably connected to the inner cavity of the cavity (301). A limiting block (303) is fixedly connected to the opposite side of each of the two moving blocks (302). A limiting groove (304) for cooperating with the limiting block (303) is opened on the surface of the arc-shaped plate (211). An adjusting block (305) is slidably connected to the inner cavity of the rotating dial (12).

2. The anti-misoperation opening device for high-voltage switchgear according to claim 1, wherein: T-shaped grooves (213) are opened on the inner walls of the first sliding cavity (201) and the second sliding cavity (202). T-shaped rods (214) are slidably connected to the inner cavities of the T-shaped grooves (213). The surfaces of the first sliding rod (203) and the second sliding rod (206) are respectively fixedly connected to the surfaces of the two T-shaped rods (214).

3. The anti-misoperation opening device for high-voltage switchgear according to claim 1, characterized in that: The inner cavity of the rotating block (12) is slidably connected to a pressing block (307); a third spring (308) is movably sleeved on the surface of the pressing block (307); one end of the third spring (308) is fixedly connected to the surface of the pressing block (307); the other end of the third spring (308) is fixedly connected to the inner wall of the rotating block (12); one end of the pressing block (307) and one end of the adjusting block (305) are both arranged in a trapezoidal shape.

4. A device for preventing misoperation of a high-voltage switchgear according to claim 1, characterized in that: The inner cavities of the main air switch (1) and the sub-air switch (11) are both provided with two wiring terminals (309) connected to external cables. The inner cavities of the main air switch (1) and the sub-air switch (11) are both provided with an adjustment cavity (310), wherein one of the wiring terminals (309) is fixedly connected to a magnetic tripping coil (311), a magnetic core (312) is provided at the center of the magnetic tripping coil (311), one end of the magnetic tripping coil (311) is fixedly connected to a stationary contact (313), and the other wiring terminal (309) is fixedly connected to a moving contact (314), and the inner cavity of the adjustment cavity (310) is rotatably connected to a toggle block (315), and a fourth spring (316) and a first spring (314) are provided on the surface of the toggle block (315). A fifth spring (317), one end of the fourth spring (316) and the fifth spring (317) are both fixedly connected to the surface of the toggle block (315), the other end of the fourth spring (316) and the other end of the fifth spring (317) are both fixedly connected to the inner wall of the adjustment cavity (310), a connecting rod (318) is fixedly connected to the surface of the magnetic core (312), one side of the adjustment block (305) is fixedly connected to an inclined rod (319) used in conjunction with the connecting rod (318), a seventh spring (306) is movably sleeved on the surface of the inclined rod (319), one end of the seventh spring (306) is fixedly connected to the inner wall of the rotating toggle block (12), and the other end of the seventh spring (306) is fixedly connected to one side of the inclined rod (319).

5. The anti-misoperation opening device for high-voltage switchgear according to claim 1, wherein: One end of the moving block (302) is fixedly connected to a guide rod (320), the surface of the guide rod (320) is slidably connected to the inner wall of the cavity (301), a sixth spring (321) is movably sleeved on the surface of the guide rod (320), one end of the sixth spring (321) is fixedly connected to the inner wall of the cavity (301), and the other end of the sixth spring (321) is fixedly connected to the moving block (302).

6. The anti-misoperation opening device for high-voltage switchgear according to claim 1, wherein: The inner cavity of the rotating dial block (12) in the main air switch (1) is slidably connected to two adjustment rods (322), and the surfaces of the two adjustment rods (322) are provided with grooves (323). The inner cavity of the rotating dial block (12) is slidably connected to a clamping block (324), one side of the clamping block (324) is fixedly connected to an elastic sheet (325), one end of the elastic sheet (325) is fixedly connected to the inner wall of the rotating dial block (12), and the inner wall of the main air switch (1) is provided with a clamping hole (326) used in conjunction with the clamping block (324).

7. The anti-misoperation opening device for high-voltage switchgear according to claim 1, characterized in that: The surfaces of the main air switch (1) and the branch air switch (11) are both slidably connected with ceramic rods (401). A marking rod (402) is slidably connected inside the ceramic rod (401). One end of the marking rod (402) is fixedly connected with a tension spring (403), and one end of the tension spring (403) is fixedly connected with the inner wall of the ceramic rod (401). The surfaces of the main air switch (1) and the branch air switch (11) are both fixedly connected with support plates (404). The inner cavity of the support plate (404) is slidably connected with the surface of the ceramic rod (401). A limiting ring (405) is fixedly connected to the surface of the ceramic rod (401). A second spring (406) is movably sleeved on the surface of the ceramic rod (401). One end of the second spring (406) is fixedly connected with the limiting ring (405), and the other end of the second spring (406) is fixedly connected with the support plate (404).

8. The anti-misoperation opening device for high-voltage switchgear according to claim 1, characterized in that: A rubber sheet (327) is fixedly connected to the surface of the arc-shaped plate (211), and both the first sliding cavity (201) and the second sliding cavity (202) are used in cooperation with the surface of the rubber sheet (327).

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