An insulation protection structure for high and low voltage electrical cabinets

Abstract

The present invention discloses an insulating protection structure for a high- and low-voltage electrical cabinet, comprising a mounting seat and a protective cover, wherein two groups of high-voltage sealed poles and low-voltage sealed poles arranged side by side are arranged on the mounting seat, the protective cover is fixed on the mounting seat and is located on the outer sides of the high-voltage sealed poles and the low-voltage sealed poles below the mounting plate, fixed plates are arranged at both ends of the mounting seat, a rotating shaft is rotatably arranged between the two fixed plates, the rotating shaft has a conductive ring which is conductively connected to the two high-voltage sealed poles or the low-voltage sealed poles, and the rotating shaft has a convex column, and a conductive movable part is slidably installed on the convex column along its central axis. The present invention can realize free switching of high-voltage and low-voltage lines by arranging high-voltage sealed poles, low-voltage sealed poles, a rotating shaft, a conductive movable part and a conductive connecting part, and the operation is simple. When the circuit is switched on or off, the arc is eliminated by releasing arc extinguishing gas, thereby achieving the effect of insulating protection.

Description

Technical Field

[0001] The invention discloses an insulation protection structure for a high- and low-voltage electrical cabinet, belonging to the technical field of electrical cabinets. Background Art

[0002] The electrical cabinet is made of steel and is used to protect the normal operation of components. The materials used to make the electrical cabinet are generally divided into two types: hot-rolled steel plates and cold-rolled steel plates. Cold-rolled steel plates are softer than hot-rolled steel plates and are more suitable for the production of electrical cabinets. Electrical cabinets are widely used in the chemical industry, environmental protection industry, power system, metallurgical system, industry, nuclear power industry, fire safety monitoring, transportation industry, etc. High and low voltage electrical cabinets, as the name implies, are power distribution equipment used for power distribution, control, metering and connecting cables in power supply systems. Since the electrical cabinet is prone to arcing during the process of disconnecting and connecting the circuit, the arc is a discharge phenomenon that has certain hazards to both electricity and the human body. In order to achieve the insulation protection effect of eliminating the arc, the electrical cabinet usually has a device for releasing arc-extinguishing gas installed inside it, but the device usually fills the entire electrical cabinet with arc-extinguishing gas to achieve the above effect, and cannot eliminate the arc in a targeted manner, and will cause great waste. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide an insulation protection structure for high and low voltage electrical cabinets.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: an insulating protection structure for high and low voltage electrical cabinets, comprising a mounting seat and a shield, characterized in that the mounting seat is provided with two groups of high voltage sealed poles and low voltage sealed poles arranged side by side, the shield is fixed on the mounting seat and is located on the outside of the high voltage sealed poles and low voltage sealed poles below the mounting plate, fixed plates are provided at both ends of the mounting seat, a rotating shaft is rotatably provided between the two fixed plates, the rotating shaft has a conductive ring that is electrically connected to the two high voltage sealed poles or the low voltage sealed poles, and the rotating shaft has a convex column, a conductive movable part is slidably installed on the convex column along its axis, and conductive engagement members that are engaged with the conductive movable part are provided at both ends of the shield. Connector, the conductive connector and the shield are horizontally slidably arranged, a terminal block electrically connected to the conductive connector is arranged on the outer side of the shield, and a gas tank is arranged below the conductive connector, the gas tank is filled with arc-extinguishing gas, and the gas tank has a plurality of gas outlets on the side close to the conductive connector, a movable sealing member is arranged on the gas tank, a part of the movable sealing member is located on the outer side of the gas tank and can abut against one end of the conductive movable member, and the other part is located on the inner side of the gas tank and seals the gas outlet, a driving member for driving the conductive movable member to slide and disengage from the conductive connector is arranged on the inner side of the rotating shaft, the movable sealing member can be squeezed by the conductive movable member to open the gas outlet and release the arc-extinguishing gas.

[0005] Preferably, the conductive movable part includes a sliding column, a telescopic conductive column, a fixed seat, a first spring, a first conductive rod and a connecting sleeve, the sliding column is slidably arranged on the inner side of the convex column, one end of the telescopic conductive column is provided with a first conductive sheet fixedly connected to two conductive rings, and the other end is provided with a first metal rod that passes through the sliding column and extends to the inner side of the fixed seat, the sliding column is provided with an annular convex, the two ends of the first spring are respectively in contact with the convex column and the annular convex, the fixed seat is a concave structure, and is fixed to the sliding column by bolts, two first conductive rods are provided, one end of the two first conductive rods is connected to the connecting sleeve, and the other end is embedded in the two ends of the fixed seat, a threading channel is provided in the fixed seat, the first metal rod and the first conductive rod are connected by a wire, and a plug is provided at the position of the fixed seat corresponding to the first conductive rod and the threading channel.

[0006] Preferably, the conductive connector includes a second conductive rod, a limiting bolt, a movable seat, a second spring and a second conductive sheet, the movable seat is located on the inner side of the protective cover, one end of the limiting bolt passes through the terminal seat and the protective cover and is fixedly connected to the movable seat, the second spring is sleeved on the limiting bolt, and the two ends respectively contact the limiting bolt and the terminal seat, two of the second conductive rod and the second conductive sheet are provided, the movable seat has a notch with a U-shaped structure, one end of the second conductive sheet is located in the notch, and the other end is embedded in the movable seat, one end of the second conductive rod passes through the protective cover and is threadedly connected to the movable seat, and the second conductive rod contacts the second conductive sheet, the protective cover has an avoidance groove for movement of one end of the second conductive rod, and the movable seat is also provided with a pressing surface that cooperates with the first conductive rod.

[0007] Preferably, the terminal block includes a third conductive sheet, a terminal post and a base, wherein two terminal posts are provided and symmetrically distributed on the third conductive sheet, the base is fixedly connected to the third conductive sheet, the base has a wire threading hole with an L-shaped structure, and the base has a shield for shielding the limit bolt and the second spring.

[0008] Preferably, the driving member includes a sliding rod, a third spring and an adjusting bolt, the sliding rod is slidably arranged on the inner side of the rotating shaft, the third spring is located at one end of the sliding rod, and the other end is in contact with one of the fixed plates, the adjusting bolt is installed on the rotating shaft and is in contact with the other end of the sliding rod, the sliding rod has an opening at the position corresponding to the sliding column, and both are provided with wedge-shaped surfaces that cooperate with each other, the rotating shaft and the sliding rod are both provided with avoidance holes, the rotating shaft has a gripping handle at one end passing through one of the fixed plates, and the fixed plate is provided with a limit column for limiting the rotation of the gripping handle by 180°.

[0009] Preferably, the movable sealing component includes a pressure rod, a mounting plate, a frustum, a fourth spring and a fixed sleeve, the pressure rod is a stepped rod structure, and one end of the pressure rod is located on the outside of the gas tank, and the other end passes through the gas tank and is fixedly connected to the mounting plate, the fixed sleeve is installed on the pressure rod, and is located between the gas tank and the mounting plate so that there is a gap between the two, the frustum is located on the mounting plate, and cooperates with the inner hole of the air outlet nozzle for sealing, the two ends of the fourth spring respectively contact the mounting plate and the gas tank, the two sides of the fixed seat have mounting grooves, one side of the mounting groove has an inclined surface for driving the pressure rod to compress the fourth spring, and a sealing member is provided between the pressure rod and the gas tank.

[0010] Preferably, the blocking member comprises a fifth spring, a pressure ring and a sealing ring which are sleeved on the pressure rod, and the pressure ring is located between the fifth spring and the sealing ring.

[0011] Preferably, the gas storage tank comprises a tank body and a cover plate, the tank body is mounted on a shield, a waist-shaped rubber ring is provided between the cover plate and the tank body, an air inlet nozzle is provided on the side of the tank body, and the shield has two arc-shaped baffles located outside the conductive connector.

[0012] Preferably, the conductive ring comprises two arc-shaped sleeves fixedly connected by bolts, the two arc-shaped sleeves have protrusions for easy assembly, and one of the arc-shaped sleeves is provided with a pressing portion that contacts and conducts electricity with the high-voltage sealed pole or the low-voltage sealed pole.

[0013] Preferably, the high-voltage sealed pole and the low-voltage sealed pole have the same structure, and both include a pole seat and a third conductive rod, one end of the third conductive rod extends to the outside of the pole seat located above, and the other end is embedded in the pole seat below, and a second metal rod and a sixth spring are provided in the pole seat located below, one end of the second metal rod is slidably set in the third conductive rod, and the other end extends to the outside of the pole seat and can contact the pressing part, and the two ends of the sixth spring contact the third conductive rod and the second metal rod respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By arranging a high-voltage sealed pole, a low-voltage sealed pole, a rotating shaft, a conductive movable part, a conductive connecting part and a terminal block, the conductive movable part is switched between two conductive connecting parts by rotating the rotating shaft 180 degrees, so that the high-voltage sealed pole and the low-voltage sealed pole are connected to the two terminal blocks respectively, so that the circuit switching effect of outputting high voltage electricity or outputting low voltage electricity can be achieved, the operation is simple and convenient, and the overall structure is compact.

[0016] 2. By setting a driving part, a gas storage tank and a movable sealing part, when the driving part drives the conductive movable part to separate from the conductive connecting part, the fixed seat drives the pressure rod to move, so that the gas outlet nozzle is opened and the arc-extinguishing gas is released before the circuit is disconnected or connected, thereby achieving the effect of eliminating the arc, effectively ensuring electrical and personal safety, and the release position of the arc-extinguishing gas is right at the connection between the conductive movable part and the conductive connecting part, and the release time is relatively short, which can not only achieve the effect of insulation protection, but also be economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an insulation protection structure for high and low voltage electrical cabinets of the present invention;

[0018] Figure 2 It is a schematic diagram of the installation structure of the shield, the rotating shaft, the conductive movable part and the conductive connecting part in the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the rotating shaft, the conductive movable part and the conductive connecting part in the present invention;

[0020] Figure 4 It is a schematic diagram of the internal structure of the rotating shaft, the conductive movable part and the sliding rod in the present invention;

[0021] Figure 5 An exploded view of the protective cover, the wiring seat and the conductive connecting piece in the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the telescopic conductive column and the sliding column in the present invention;

[0023] Figure 7 An exploded view of the gas storage tank and the movable seal in the present invention;

[0024] Figure 8 It is a schematic structural diagram of the pole seat and the second metal rod in the present invention;

[0025] Fig. 9 It is a schematic diagram of the structure of the conductive ring in the present invention;

[0026] Fig.10 It is a schematic diagram of the structure of the protective cover in the present invention;

[0027] Fig.11 It is a schematic diagram of the structure of the fixed plate, the rotating shaft and the driving member in the present invention;

[0028] Figure numerals: 1, high-voltage solid-sealed pole; 2, low-voltage solid-sealed pole; 3, mounting seat; 4, terminal seat; 5, pole seat; 6, conductive ring; 7, rotating shaft; 8, driving member; 9, fixing plate; 10, shield; 11, gas tank; 12, conductive movable member; 13, convex column; 14, first conductive sheet; 15, sliding rod; 16, blocking member; 17, movable sealing member; 18, conductive connecting member; 19, inclined surface; 20, pressing part; 21, first metal rod; 22, mounting groove; 23, fixing seat; 24, connecting sleeve; 25, first conductive rod; 26, plug; 27, threading channel; 28, first spring; 29, annular convex; 30, sliding column; 31, telescopic conductive column; 32, second conductive sheet; 33, notch; 34, pressing surface ; 35. movable seat; 36. arc-shaped baffle; 37. second conductive rod; 38. terminal; 39. third conductive sheet; 40. baffle; 41. limit bolt; 42. second spring; 43. base; 44. threading hole; 45. wedge-shaped surface; 46. cover plate; 47. sealing ring; 48. pressure ring; 49. pressure rod; 50. mounting plate; 51. cone; 52. air outlet nozzle; 53. tank body; 54. air inlet nozzle; 55. waist-shaped rubber ring; 56. fixing sleeve; 57. fourth spring; 58. second metal rod; 59. sixth spring; 60. adjusting bolt; 61. third conductive rod; 62. arc-shaped sleeve; 63. protrusion; 64. gripping handle; 65. limit column; 66. fifth spring; 67. third spring; 68. avoidance hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 11As shown, an insulating protection structure for a high- and low-voltage electrical cabinet includes a mounting seat 3 and a shield 10, characterized in that two groups of high-voltage solid-sealed poles 1 and low-voltage solid-sealed poles 2 arranged side by side are arranged on the mounting seat 3, and the shield 10 is fixed on the mounting seat 3 and is located on the outside of the high-voltage solid-sealed poles 1 and the low-voltage solid-sealed poles 2 below the mounting plate 50, and fixed plates 9 are arranged at both ends of the mounting seat 3, and a rotating shaft 7 is rotatably arranged between the two fixed plates 9, and the rotating shaft 7 has a conductive ring 6 that is conductively connected to the two high-voltage solid-sealed poles 1 or the low-voltage solid-sealed poles 2, and the rotating shaft 7 has a convex column 13, and a conductive movable part 12 is slidably installed on the convex column 13 along its axis, and conductive connectors 18 that are clamped with the conductive movable part 12 are arranged at both ends of the shield 10, and the conductive connector 18 and the shield 10 are connected It is arranged to slide horizontally, and a terminal block 4 electrically connected to a conductive connector 18 is arranged on the outer side of the shield 10, and a gas tank 11 is arranged below the conductive connector 18 of the shield 10, the gas tank 11 is filled with arc-extinguishing gas, and a side of the gas tank 11 close to the conductive connector 18 has a plurality of gas outlet nozzles 52, and a movable seal 17 is arranged on the gas tank 11, a part of the movable seal 17 is located on the outer side of the gas tank 11 and can contact with one end of the conductive movable part 12, and the other part is located on the inner side of the gas tank 11 and seals the gas outlet nozzle 52, and a driving part 8 for driving the conductive movable part 12 to slide and disengage from the conductive connector 18 is arranged on the inner side of the rotating shaft 7, and the movable seal 17 can be squeezed by the conductive movable part 12 to open the gas outlet nozzle 52 and release the arc-extinguishing gas.

[0031] The conductive movable part 12 includes a sliding column 30, a telescopic conductive column 31, a fixed seat 23, a first spring 28, a first conductive rod 25 and a connection sleeve 24. The sliding column 30 is slidably arranged on the inner side of the convex column 13. One end of the telescopic conductive column 31 is provided with a first conductive sheet 14 fixedly connected to two conductive rings 6, and the other end is provided with a first metal rod 21 that passes through the sliding column 30 and extends to the inner side of the fixed seat 23. The sliding column 30 is provided with an annular protrusion 29. The two ends of the first spring 28 respectively contact the convex column 13 and the annular protrusion 29. The fixed seat 23 is a concave structure and is fixed to the sliding column 30 by bolts. Two first conductive rods 25 are provided. One end of the two first conductive rods 25 is connected to the connection sleeve 24, and the other end is embedded in the two ends of the fixed seat 23. A threading channel 27 is provided in the fixed seat 23. The first metal rod 21 and The first conductive rods 25 are connected by wires, and a plug 26 is provided at the position of the fixed seat 23 corresponding to the first conductive rod 25 and the threading channel 27. The first conductive rod 25 is connected to the first metal rod 21 through a wire buried in the threading channel 27 (the wire is not drawn, but it does not affect the understanding of the scheme), and the first metal rod 21 is connected to the first conductive sheet 14 and the conductive ring 6 through the telescopic conductive column 31. The split design is adopted, and disassembly and assembly are more convenient. When the sliding column 30 slides, the first spring 28 is compressed, thereby driving the fixed seat 23 and the first conductive rod 25 to move synchronously, so that the first conductive rod 25 can be conveniently connected to the conductive connecting member 18, and the first spring 28 has a reset effect on the sliding column 30, so that the first conductive rod 25 and the conductive connecting member 18 have a locking effect, so that the two will not be easily separated.

[0032] The conductive connector 18 includes a second conductive rod 37, a limiting bolt 41, a movable seat 35, a second spring 42, and a second conductive sheet 32. The movable seat 35 is located on the inner side of the shield 10. One end of the limiting bolt 41 passes through the terminal seat 4 and the shield 10 and is fixedly connected to the movable seat 35. The second spring 42 is sleeved on the limiting bolt 41, and its two ends are respectively in conflict with the limiting bolt 41 and the terminal seat 4. The second conductive rod 37 and the second conductive sheet 32 ​​are both provided with two. The movable seat 35 has a notch 33 with a U-shaped structure. One end of the second conductive sheet 32 ​​is located in the notch 33, and the other end is embedded in the movable seat 35. One end of the second conductive rod 37 passes through the shield 10 and is threadedly connected to the movable seat 35, and the second conductive rod 37 conflicts with the second conductive sheet 32. The movable seat 35 is provided with an avoidance groove for one end of the second conductive rod 37 to move. The movable seat 35 is also provided with a pressing surface 34 that cooperates with the first conductive rod 25. When the conductive movable part 12 rotates to the position of the conductive connecting part 18 along with the rotating shaft 7, the first conductive rod 25 first contacts the pressing surface 34, so that the movable seat 35 drives the second conductive rod 37 and the limiting bolt 41 to move, and compresses the second spring 42. In this way, when the first conductive rod 25 slides to a position opposite to the notch 33, the second spring 42 drives the limiting bolt 41 and the movable seat 35 to reset, and the first conductive rod 25 is stuck in the notch 33 and enables the first conductive rod 25 to achieve circuit connection with the second conductive sheet 32. When the rotating shaft 7 is rotated again, the conductive movable part 12 cannot be separated from the conductive connecting part 18, thereby achieving locking.

[0033] The terminal block 4 includes a third conductive sheet 39, a terminal post 38 and a base 43. Two terminal posts 38 are provided and symmetrically distributed on the third conductive sheet 39. The base 43 is fixedly connected to the third conductive sheet 39. The base 43 has an L-shaped threading hole 44. The threading hole 44 can be used for the wire to pass through and connect its two ends with the second conductive rod 37 and the terminal post 38. The base 43 has a shield 40 for shielding the limit bolt 41 and the second spring 42. The shield 40 can prevent external parts from getting stuck in the second spring 42 and making it unable to be compressed, so that the movable seat 35 can move normally.

[0034] The driving member 8 includes a sliding rod 15, a third spring 67 and an adjusting bolt 60. The sliding rod 15 is slidably arranged on the inner side of the rotating shaft 7. The third spring 67 is located at one end of the sliding rod 15, and the other end thereof abuts against one of the fixed plates 9. The adjusting bolt 60 is mounted on the rotating shaft 7 and abuts against the other end of the sliding rod 15. The sliding rod 15 has an opening at a position corresponding to the sliding column 30, and both are provided with mutually matching wedge-shaped surfaces 45. The rotating shaft 7 and the sliding rod 15 are both provided with avoidance holes 68. One end of the rotating shaft 7 passing through one of the fixed plates 9 has a gripping handle 64, and the fixed plate 9 is provided with a limiting grip. The limit column 65 is rotated 180° by holding the handle 64. When the knob adjustment bolt 60 is turned in one direction, one end of the adjustment bolt 60 can push the sliding rod 15 to slide in the rotating shaft 7. The sliding rod 15 and the sliding column 30 rely on the cooperation of the wedge surface 45 to make the sliding column 30 start to slide. In order to ensure that the sliding rod 15 slides in a directional manner without self-rotation, positioning surfaces are provided on the sliding rod 15 and the telescopic conductive column 31. The sliding of the sliding column 30 can drive the fixing seat 23 to move horizontally, so that the first conductive rod 25 can smoothly disengage from the notch 33 and disconnect the circuit from the second conductive sheet 32.

[0035] The movable seal 17 includes a pressure rod 49, a mounting plate 50, a cone 51, a fourth spring 57 and a fixing sleeve 56. The pressure rod 49 is a stepped rod structure, and one end of the pressure rod is located on the outside of the gas tank 11, and the other end passes through the gas tank 11 and is fixedly connected to the mounting plate 50. The fixing sleeve 56 is installed on the pressure rod 49 and is located between the gas tank 11 and the mounting plate 50 so that there is a gap between the two. The cone 51 is located on the mounting plate 50 and cooperates with the inner hole of the air outlet nozzle 52 for sealing. The two ends of the fourth spring 57 are respectively in contact with the mounting plate 50 and the gas tank 11. The two sides of the fixed seat 23 are provided with mounting grooves 22, and one side of the mounting groove 22 is provided with an inclined surface 19 for driving the pressure rod 49 to compress the fourth spring 57. When the fixed seat 23 moves horizontally driven by the sliding column 30, the position of the intrusion between the inclined surface 19 and the pressure rod 49 changes, so that the pressure rod 49 moves downward, and the mounting plate 50 moves downward synchronously and compresses the fourth spring 57, so that the cone 51 is no longer sealed. Block the air outlet nozzle 52, and the arc-extinguishing gas flows out from the air outlet nozzle 52 and blows to the position where the first conductive rod 25 is connected to the second conductive sheet 32. At this time, the first conductive rod 25 and the second conductive sheet 32 ​​still maintain a conductive connection until the two are slowly separated. In this way, the arc-extinguishing gas can completely eliminate the arc generated when the two are separated, and effectively play the role of insulation protection. When the fixed seat 23 rotates with the rotating shaft 7, the inclined surface 19 will still produce a pressing effect on the pressure rod 49 in the other gas storage tank 11, so that the air outlet nozzle 52 opens and releases the arc-extinguishing gas, and the gas storage tank 11 can be automatically closed after the circuit is connected. In this embodiment, except for the conductive parts or parts used for conduction, the rotating shaft 7, the fixed seat 23, the movable seat 35, etc. require manual direct or indirect operation and are made of insulating materials, or have an insulating coating coated on their surface, so as to ensure the safety of manual operation. This technical requirement belongs to the basic common sense of technicians in this field and will not be described in detail.

[0036] There is a sealing member 16 between the pressure rod 49 and the gas tank 11. The sealing member 16 includes a fifth spring 66, a pressure ring 48 and a sealing ring 47 which are sleeved on the pressure rod 49. The pressure ring 48 is located between the fifth spring 66 and the sealing ring 47. The force exerted by the fifth spring 66 on the pressure ring 48 is transmitted to the sealing ring 47, so that the sealing ring 47 is deformed under pressure to ensure the sealing between the pressure rod 49 and the gas tank 11.

[0037] The gas storage tank 11 includes a tank body 53 and a cover plate 46. The tank body 53 is installed on the protective cover 10. There is a waist-shaped rubber ring 55 between the cover plate 46 and the tank body 53. The waist-shaped rubber ring 55 can prevent the gas from leaking out from there between. The side of the tank body 53 has an air inlet nozzle 54. The external inflation device can continuously fill the tank body 53 with arc-extinguishing gas. The protective cover 10 has two arc-shaped baffles 36 located on the outside of the conductive connecting part 18. When the arc-extinguishing gas is blown toward the conductive movable part 12 and the conductive connecting part 18, the arc-shaped baffles 36 can prevent the arc-extinguishing gas from overflowing to both sides, so that the arc generated between the conductive movable part 12 and the conductive connecting part 18 can be concentratedly eliminated.

[0038] The conductive ring 6 includes two arc-shaped sleeves 62 fixedly connected by bolts, and the two arc-shaped sleeves 62 have protrusions 63 for easy assembly. The protrusions 63 are fixed to the rotating shaft 7 by two bolts. The conductive ring 6 is installed stably and firmly, and the conductive ring 6 will not move when subjected to force. A pressing portion 20 that contacts and conducts electricity with the high-voltage sealed pole 1 or the low-voltage sealed pole 2 is provided on one of the arc-shaped sleeves 62. The high-voltage sealed pole 1 has the same structure as the low-voltage sealed pole 2, and both include a pole seat 5 and a third conductive rod 61. One end of the third conductive rod 61 extends to the outer side of the pole seat 5 located above, and the other end Embedded in the lower pole seat 5, a second metal rod 58 and a sixth spring 59 are provided in the lower pole seat 5, one end of the second metal rod 58 is slidably set in the third conductive rod 61, and the other end extends to the outside of the pole seat 5 and can contact with the pressing portion 20, and the two ends of the sixth spring 59 contact with the third conductive rod 61 and the second metal rod 58 respectively. The second metal rod 58 always protrudes from the surface of the pole seat 5 under the action of the sixth spring 59. At the same time, when the pressing portion 20 rotates with the arc sleeve 62 and contacts with the second metal rod 58, it can always maintain the circuit connection between it and the third conductive rod 61.

[0039] Working principle: The high-voltage sealed pole 1 is connected to the terminal block 4 through the conductive ring 6, the conductive movable part 12, and the conductive connecting part 18. When the entire circuit needs to be switched to low voltage, the adjusting bolt 60 is first turned to make the sliding rod 15 slide along the rotating shaft 7 and compress the third spring 67. When the sliding rod 15 slides, the sliding column 30 drives the fixed seat 23 to move horizontally by relying on the wedge surface 45. The first conductive rod 25 moves synchronously and slowly moves away from the second conductive sheet 32. Since the second conductive sheet 32 ​​has a certain contact with the first conductive rod 25, the second conductive sheet 32 ​​and the first conductive rod 25 have a certain contact contact. The connection length of the two will not separate immediately. At this time, when the fixed seat 23 moves, the inclined surface 19 forces the pressure rod 49 to compress the fourth spring 57 so that the cone 51 no longer blocks the gas outlet nozzle 52, thereby releasing the arc-extinguishing gas and completely covering the connection between the first conductive rod 25 and the second conductive sheet 32. When the two are separated, the arc generated can be eliminated by the arc-extinguishing gas, which effectively plays an insulating protection effect. Then, the rotating shaft 7 is rotated, so that the conductive movable part 12 rotates synchronously with the rotating shaft 7, and the movable seal 17 is driven by the fourth spring 57. The gas tank 11 is automatically closed, and when the fixing seat 23 hits the pressure rod 49 on another gas tank 11, the fixing seat 23 will press the pressure rod 49 and drive the cone 51 to move, so that the gas tank 11 can release arc-extinguishing gas before the low-voltage circuit is connected, and the adjusting bolt 60 is turned to close the gas tank 11 after the first conductive rod 25 and the second conductive sheet 32 ​​are connected. In this way, the arc generated can be eliminated when the circuit is connected or disconnected. The arc-extinguishing gas release time is short and the release amount is also small, which can be achieved in It is more economical and practical while ensuring the elimination of arcs. The conductive movable part 12 follows the rotating shaft 7 to rotate 180° to reach a position relative to another conductive connecting part 18, and then the adjusting bolt 60 is rotated in the opposite direction to reset the sliding rod 15 and the conductive movable part 12. The conductive movable part 12 and the conductive connecting part 18 are connected, so that the low-voltage circuit is turned on. In the process of switching between high-voltage and low-voltage circuits, the knob adjusting bolt 60 must be turned to release the arc-extinguishing gas before the rotating shaft 7 can be rotated, thereby ensuring the safety of circuit switching.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An insulation protection structure for a high and low voltage electrical cabinet, comprising a mounting seat (3) and a protective cover (10), characterized in that: The mounting seat (3) is provided with two groups of high-voltage sealed poles (1) and low-voltage sealed poles (2) arranged side by side. The shield (10) is fixed on the mounting seat (3) and is located on the outer sides of the high-voltage sealed poles (1) and the low-voltage sealed poles (2) below the mounting plate (50). Fixed plates (9) are provided at both ends of the mounting seat (3). A rotating shaft (7) is rotatably provided between the two fixed plates (9). The rotating shaft (7) has a conductive ring (6) that is electrically connected to the two high-voltage sealed poles (1) or the low-voltage sealed poles (2). The rotating shaft (7) has a convex column (13). A conductive movable part (12) is slidably installed on the convex column (13) along its axis. Conductive connecting parts (18) that are clamped with the conductive movable part (12) are provided at both ends of the shield (10). The conductive connecting parts (18) and the shield (10) are horizontally slidably provided. The shield (10) A terminal block (4) electrically connected to a conductive connector (18) is arranged on the outside, and a gas tank (11) is arranged below the conductive connector (18) on the protective cover (10). The gas tank (11) is filled with arc-extinguishing gas, and a side of the gas tank (11) close to the conductive connector (18) has a plurality of gas outlets (52). A movable sealing member (17) is arranged on the gas tank (11), a part of which is located on the outside of the gas tank (11) and can contact one end of the conductive movable member (12), and the other part is located on the inside of the gas tank (11) and seals the gas outlets (52). A driving member (8) for driving the conductive movable member (12) to slide and detach from the conductive connector (18) is arranged on the inside of the rotating shaft (7). The movable sealing member (17) can be squeezed by the conductive movable member (12) to open the gas outlets (52) and release the arc-extinguishing gas.

2. The insulation protection structure for high and low voltage electrical cabinets according to claim 1 is characterized in that: The conductive movable part (12) comprises a sliding column (30), a telescopic conductive column (31), a fixed seat (23), a first spring (28), a first conductive rod (25) and a connection sleeve (24); the sliding column (30) is slidably arranged on the inner side of the convex column (13); one end of the telescopic conductive column (31) is provided with a first conductive sheet (14) fixedly connected to two conductive rings (6); and the other end is provided with a first metal rod (21) that passes through the sliding column (30) and extends to the inner side of the fixed seat (23); the sliding column (30) is provided with a ring convex (29); both ends of the first spring (28) are provided with a first conductive sheet (14) fixedly connected to two conductive rings (6); The fixing seat (23) is in concave structure and is fixed to the sliding post (30) by bolts. Two first conductive rods (25) are provided. One end of the two first conductive rods (25) is connected to the connecting sleeve (24), and the other end is embedded in the two ends of the fixing seat (23). A threading channel (27) is provided in the fixing seat (23). The first metal rod (21) and the first conductive rod (25) are connected by a wire. A plug (26) is provided at the position of the fixing seat (23) corresponding to the first conductive rod (25) and the threading channel (27).

3. The insulation protection structure for high and low voltage electrical cabinets according to claim 2 is characterized in that: The conductive connector (18) comprises a second conductive rod (37), a limiting bolt (41), a movable seat (35), a second spring (42) and a second conductive sheet (32); the movable seat (35) is located on the inner side of the shield (10); one end of the limiting bolt (41) passes through the wiring seat (4) and the shield (10) and is fixedly connected to the movable seat (35); the second spring (42) is sleeved on the limiting bolt (41), and the two ends thereof are respectively in contact with the limiting bolt (41) and the wiring seat (4); the second conductive rod (37) and the second conductive sheet (32) are both Two of them are provided, the movable seat (35) has a notch (33) of a U-shaped structure, one end of the second conductive sheet (32) is located in the notch (33), and the other end is embedded in the movable seat (35), one end of the second conductive rod (37) passes through the protective cover (10) and is threadedly connected to the movable seat (35), and the second conductive rod (37) contacts the second conductive sheet (32), the protective cover (10) has an avoidance groove for one end of the second conductive rod (37) to move, and the movable seat (35) is also provided with a pressing surface (34) that cooperates with the first conductive rod (25).

4. The insulation protection structure for high and low voltage electrical cabinets according to claim 3 is characterized in that: The terminal block (4) comprises a third conductive sheet (39), a terminal post (38) and a base (43); two terminal posts (38) are provided and symmetrically distributed on the third conductive sheet (39); the base (43) is fixedly connected to the third conductive sheet (39); the base (43) has an L-shaped threading hole (44); and the base (43) has a shield (40) for shielding a limit bolt (41) and a second spring (42).

5. The insulation protection structure for high and low voltage electrical cabinets according to claim 2, characterized in that: The driving member (8) comprises a sliding rod (15), a third spring (67) and an adjusting bolt (60); the sliding rod (15) is slidably arranged on the inner side of the rotating shaft (7); the third spring (67) is located at one end of the sliding rod (15), and the other end thereof abuts against one of the fixed plates (9); the adjusting bolt (60) is mounted on the rotating shaft (7) and abuts against the other end of the sliding rod (15); the sliding rod (15) has an opening at a position corresponding to the sliding column (30), and both are provided with mutually matching wedge surfaces (45); the rotating shaft (7) and the sliding rod (15) are both provided with avoidance holes (68); the rotating shaft (7) has a gripping handle (64) at one end thereof passing through one of the fixed plates (9); and the fixed plate (9) is provided with a limiting column (65) for limiting the gripping handle (64) from rotating 180°.

6. The insulation protection structure for high and low voltage electrical cabinets according to claim 2, characterized in that: The movable sealing member (17) comprises a pressure rod (49), a mounting plate (50), a frustum (51), a fourth spring (57) and a fixing sleeve (56); the pressure rod (49) is a stepped rod structure, one end of which is located outside the gas storage tank (11), and the other end passes through the gas storage tank (11) and is fixedly connected to the mounting plate (50); the fixing sleeve (56) is installed on the pressure rod (49) and is located between the gas storage tank (11) and the mounting plate (50) so that there is a gap between the two. The cone (51) is located on the mounting plate (50) and is sealed with the inner hole of the air outlet nozzle (52). The two ends of the fourth spring (57) are respectively in contact with the mounting plate (50) and the air storage tank (11). The two sides of the fixing seat (23) are provided with mounting grooves (22). One side of the mounting groove (22) is provided with an inclined surface (19) for driving a pressure rod (49) to compress the fourth spring (57). A sealing member (16) is provided between the pressure rod (49) and the air storage tank (11).

7. The insulation protection structure for high and low voltage electrical cabinets according to claim 6, characterized in that: The blocking member (16) comprises a fifth spring (66), a pressure ring (48) and a sealing ring (47) which are sleeved on a pressure rod (49); the pressure ring (48) is located between the fifth spring (66) and the sealing ring (47).

8. The insulation protection structure for high and low voltage electrical cabinets according to claim 6, characterized in that: The gas storage tank (11) comprises a tank body (53) and a cover plate (46); the tank body (53) is mounted on the protective cover (10); a waist-shaped rubber ring (55) is provided between the cover plate (46) and the tank body (53); a gas inlet nozzle (54) is provided on the side of the tank body (53); and the protective cover (10) has two arc-shaped retaining strips (36) located outside the conductive connecting piece (18).

9. The insulation protection structure for high and low voltage electrical cabinets according to claim 1, characterized in that: The conductive ring (6) comprises two arc-shaped sleeves (62) fixedly connected by bolts, the two arc-shaped sleeves (62) are provided with protrusions (63) for easy assembly, and one of the arc-shaped sleeves (62) is provided with a pressing portion (20) for contacting and conducting with the high-voltage sealed pole (1) or the low-voltage sealed pole (2).

10. The insulation protection structure for high and low voltage electrical cabinets according to claim 9, characterized in that The high-voltage sealed pole (1) and the low-voltage sealed pole (2) have the same structure, and both include a pole seat (5) and a third conductive rod (61), one end of the third conductive rod (61) extends to the outside of the pole seat (5) located above, and the other end is embedded in the pole seat (5) below, and a second metal rod (58) and a sixth spring (59) are provided in the pole seat (5) located below, one end of the second metal rod (58) is slidably arranged in the third conductive rod (61), and the other end extends to the outside of the pole seat (5) and can contact the pressing part (20), and the two ends of the sixth spring (59) contact the third conductive rod (61) and the second metal rod (58) respectively.

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