Gas ring main unit

Abstract

The invention relates to the field of ring main units, in particular to a gas ring main unit, which comprises a vacuum arc-extinguishing chamber, a circuit breaker main shaft, an isolating switch and a cabinet body, the upper part of the cabinet body is provided with a wire inlet end, the lower part of the cabinet body is provided with a wire outlet end, the vacuum arc-extinguishing chamber is connected with the wire outlet end, the upper end of the isolating switch is connected with the wire inlet end, and the lower end of the isolating switch is connected with the wire outlet end. The lower end of the disconnecting switch is provided with a connecting sheet used for being connected with a vacuum arc-extinguishing chamber, the cabinet body is provided with an installation cover, the installation cover is provided with a cover body, the cover body covers the vacuum arc-extinguishing chamber and the connecting sheet, the cover body is made of an insulating material, and the end face, located at the opening, of the cover body abuts against the side face of the installation cover. According to the invention, the ring main unit is more compact.

Description

Technical Field

[0001] This application relates to the field of ring main units, and particularly to a gas-insulated ring main unit. Background Art

[0002] A gas-insulated ring main unit is a key power equipment used in medium-voltage distribution systems. Its core feature is that insulating gas (mainly SF6 or environmentally friendly alternative gas) passes through the interior of the cabinet, making the conductivity inside the cabinet poor, thus achieving an insulating effect. Usually, to ensure sufficient insulation distance, there are certain restrictions on the minimum distance of the internal space of the ring main unit. The wider the internal space of the ring main unit, the greater the insulation distance and the better the insulation effect. However, this will result in the space of the ring main unit not being compact enough, increasing the floor area occupied by the ring main unit. Summary of the Invention

[0003] In order to make the ring main unit more compact and reduce the floor area occupied by the ring main unit, this application provides a gas-insulated ring main unit.

[0004] A gas-insulated ring main unit provided by this application adopts the following technical solutions: A gas-insulated ring main unit includes a vacuum interrupter, a circuit breaker main shaft, a disconnector, and a cabinet. An incoming line terminal is arranged at the upper part of the cabinet, and an outgoing line terminal is arranged at the lower part of the cabinet. The vacuum interrupter is connected to the outgoing line terminal. The upper end of the disconnector is connected to the incoming line terminal, and a connecting piece is arranged at the lower end of the disconnector for connecting to the vacuum interrupter. An installation cover is arranged on the cabinet, and a cover body is arranged on the installation cover. The cover body covers the vacuum interrupter and the connecting piece. The cover body is made of insulating material, and the end face of the cover body at the opening abuts against the side face of the installation cover.

[0005] By adopting the above technical solutions, high voltage is usually generated at the circuit breaker switch in the existing ring main unit. Therefore, this application is provided with a cover body made of insulating material, which covers the vacuum interrupter and the connecting piece. The cover body plays a certain insulating role, and correspondingly, the insulation distance can be appropriately reduced, making the width of the cabinet smaller, thereby improving the compactness of the cabinet and reducing the floor area occupied by the cabinet.

[0006] Optionally, an insulating pull rod is arranged on the circuit breaker main shaft, a pressure rod is arranged on the insulating pull rod, the pressure rod is used for connecting to the connecting piece, and one end of the insulating pull rod is hinged to the circuit breaker main shaft.

[0007] Optionally, the pressure rod is slidably connected to the insulating pull rod along the axial direction. A first spring is arranged on the insulating pull rod, and the first spring forces the pressure rod to move towards the connecting piece. The disconnecting switch includes a rotating shaft, a moving contact, and a static contact. Both ends of the rotating shaft are rotatably connected to the cabinet body. The moving contact is arranged on the rotating shaft, and the static contact is connected to the incoming line end. The rotating shaft can drive the moving contact and the static contact to be connected through rotation.

[0008] By adopting the above technical solution, the rotating shaft rotates to control the connection of the moving contact and the static contact. When it is necessary to disconnect the power supply, the rotating shaft controls the moving contact and the static contact to disconnect, thereby forming a clear, visible, and reliable physical disconnection point, thus ensuring the safety of personnel and equipment.

[0009] Optionally, a first driving component is arranged on the cabinet body. A driving shaft is rotatably connected to the cabinet body. The first driving component is used to drive the driving shaft to rotate. The driving shaft and the rotating shaft are coaxially arranged. A first connecting component is arranged between the driving shaft and the rotating shaft. Under normal conditions, the driving shaft and the rotating shaft are disconnected so that the driving shaft cannot drive the rotating shaft to rotate. When the main shaft of the circuit breaker rotates to disconnect the connecting piece and the vacuum interrupter, the first connecting component connects the driving shaft and the rotating shaft.

[0010] By adopting the above technical solution, when operating the disconnecting switch, it is necessary to ensure that the voltage difference on both sides is extremely small and there is no current flowing through, otherwise the arc generated during operation will seriously damage the switch equipment. Therefore, a first connecting component is provided. Only when the main shaft of the circuit breaker rotates to disconnect the connecting piece and the vacuum interrupter, the first connecting component will connect the driving shaft and the rotating shaft. Only at this time can the driving shaft drive the rotating shaft to rotate, thereby reducing the possibility of equipment damage caused by misoperation.

[0011] Optionally, the first connecting component includes a contact plate and a sliding cylinder. There are several contact plates, which are distributed in a circumferential array around the axis of the rotating shaft. The length direction of the contact plate is parallel to the axis direction of the rotating shaft. One end of the contact plate is slidably connected to the rotating shaft along the radial direction of the rotating shaft. The sliding cylinder is slidably connected to the rotating shaft along the axial direction. Two second connecting rods are arranged on the contact plate. The two second connecting rods are respectively and parallelly arranged along the length direction of the contact plate. The two ends of the second connecting rod are respectively hinged to the contact plate and the sliding cylinder. An installation hole is opened on the end face of the driving shaft, and several contact plates are located in the installation hole.

[0012] By adopting the above technical solution, when it is necessary to connect the rotating shaft and the driving shaft, the sliding cylinder is slid. After the sliding cylinder slides, it will drive several abutting plates to expand outwards through the second connecting rod, so that the abutting plates abut against the hole wall of the mounting hole, so that the driving shaft can drive the rotating shaft to rotate when it rotates.

[0013] Optionally, the first connection assembly further includes a driving block, the driving block is rotatably connected to the rotating shaft, the driving block and the sliding cylinder are coaxially arranged, the driving block is provided with a first guiding block, several first guiding blocks are provided and are circumferentially arrayed around the axis of the driving block, one side of the first guiding block has a first guiding surface, one side of the sliding cylinder close to the driving block has a second guiding block, several second guiding blocks are provided and are circumferentially arrayed around the axis direction of the sliding cylinder, several first guiding blocks and several second guiding blocks are alternately arranged, a second guiding surface is provided on one side of the first guiding block, the first guiding surface abuts against the second guiding surface, when the driving block rotates, the sliding cylinder is forced to slide towards the direction close to the driving shaft through the cooperation of the first guiding surface and the second guiding surface.

[0014] By adopting the above technical solution, a driving block is provided. By rotating the driving block, and then through the cooperation of the first guiding surface and the second guiding surface to force the sliding cylinder to slide towards the direction close to the driving shaft, so that several abutting plates expand outwards and abut against the inner wall of the mounting hole to connect the driving shaft and the rotating shaft.

[0015] Optionally, a hydraulic box is arranged above the main shaft of the circuit breaker on the cabinet body. A first cavity is arranged in the hydraulic box. A second cavity is arranged on the side of the rotating shaft away from the sliding cylinder. The second cavity is fan-shaped. A driving rod is coaxially arranged on the driving block. A second pressing plate is arranged on the driving rod. The second pressing plate is located in the second cavity. A first pressing plate located in the first cavity is arranged on the main shaft of the circuit breaker. A fifth connecting pipe is communicated between the first cavity and the second cavity. Liquid is filled on one side of the first cavity close to the fifth connecting pipe, the fifth connecting pipe and one side of the second cavity close to the fifth connecting pipe. When the main shaft of the circuit breaker rotates, the liquid in the first cavity can be pressed into the second cavity through the first pressing plate to force the second pressing plate to rotate.

[0016] By adopting the above technical solution, when the main shaft of the circuit breaker rotates, it will drive the first pressing plate to press the liquid in the first cavity into the second cavity, so that the second pressing plate rotates, and then drives the driving rod to rotate, so as to drive the driving block to rotate, and through the first guiding surface and the second guiding surface, the sliding cylinder is forced to slide to connect the driving shaft and the rotating shaft.

[0017] Optionally, an airbag sheet is provided on the outer side of the abutting plate. A plurality of arc-shaped grooves are provided around the hole wall of the mounting hole. Two limiting strips are provided on the outer side of the abutting plate. The limiting strips are arc-shaped. The two limiting strips are respectively located on both sides of the airbag distributed in the width direction. The thickness of the limiting strip is less than the thickness of the airbag sheet. The arc length of the side of the limiting strip away from the abutting plate is greater than the arc length of the arc-shaped groove at the opening.

[0018] By adopting the above technical solution, firstly, when the abutting plate moves towards the hole wall of the mounting hole, the airbag sheet deforms, so that part of the airbag sheet is clamped in the arc-shaped groove to limit the abutting plate and the driving shaft, thereby reducing the possibility of slipping; secondly, the two sides of the airbag sheet are limited by the limiting strips, so that the airbag sheet will not expand to both sides during deformation, which is beneficial to increasing the depth of the airbag sheet clamped in the arc-shaped groove during deformation, thereby improving the stability of the driving shaft driving the rotating shaft to rotate.

[0019] Optionally, a cabinet door is provided on one side of the cabinet body. One side of the cabinet door is hinged to the cabinet body. The cabinet body is provided with a limiting component for limiting and fixing the free end of the cabinet door. An airbag component is provided in the cabinet body. When the cabinet body is filled with high pressure, the airbag component can drive the limiting component to limit the free end of the cabinet door. The rotating shaft is provided with a second connection component. When the moving contact is connected to the static contact, the second connection component drives the limiting component to limit the free end of the cabinet door.

[0020] By adopting the above technical solution, an airbag component and a second connection component are provided. When the cabinet body is filled with high pressure and the disconnector is not disconnected, the limiting component can limit the cabinet door, so that the staff cannot open the cabinet door, thereby ensuring the safety of the staff.

[0021] Optionally, the limiting component includes a limiting plate provided on the cabinet door and a limiting rod provided on the inner wall of the cabinet body. A limiting hole for inserting the limiting rod is provided on the limiting plate. The airbag component includes an airbag part, a first driving box, a piston and a first communication pipe provided on the inner wall of the cabinet body. Under normal conditions, the airbag part is inflated and expanded. A second sliding cavity is provided in the first driving box. The piston is slidably connected to the second sliding cavity. Both ends of the first communication pipe are respectively communicated with the airbag part and the lower part of the second sliding cavity.

[0022] By adopting the above technical solution, when the airbag part is arranged in the cabinet body and the equipment is operating, the cabinet body will be filled with gas for insulation. At this time, the air pressure in the cabinet body is relatively high, which will cause the airbag part to become smaller and squeeze the internal gas into the second sliding cavity through the third communication pipe, so that the piston slides and drives the limiting rod to be inserted into the limiting hole, so that when the cabinet body is filled with high pressure, the cabinet door cannot be opened.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: In existing ring main units, high voltage is usually easily generated at the circuit breaker switch. Therefore, the present application is provided with a cover body made of insulating material, which wraps the vacuum interrupter and the connecting piece. The cover body has a certain insulating effect, and correspondingly, the insulating distance can be appropriately reduced, making the width of the cabinet smaller, thereby improving the compactness of the cabinet and reducing the floor area occupied by the cabinet; When operating the disconnector, it is necessary to ensure that the voltage difference on both sides is extremely small and there is no current flowing through, otherwise the arc generated during operation will seriously damage the switching equipment. Therefore, a first connection component is provided. Only when the main shaft of the circuit breaker rotates to disconnect the connecting piece and the vacuum interrupter, the first connection component will connect the drive shaft and the rotating shaft, and only then can the drive shaft drive the rotating shaft to rotate, thereby reducing the possibility of equipment damage caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of Embodiment 1; Figure 2 is a schematic structural diagram of the cover body in Embodiment 1; Figure 3 is a schematic structural diagram of the insulating pull rod in Embodiment 1; Figure 4 is a schematic structural diagram of Embodiment 2; Figure 5 is a schematic connection diagram of the drive shaft and the rotating shaft in Embodiment 2; Figure 6 is a schematic structural diagram of the rotating shaft in Embodiment 2; Figure 7 is a schematic structural diagram of the hydraulic box in Embodiment 2; Figure 8 is a schematic structural diagram of the drive rod in Embodiment 2; Figure 9 is a schematic structural diagram of the abutting plate in Embodiment 2; Figure 10 is a schematic structural diagram of Embodiment 3; Figure 11 is a schematic structural diagram of the limiting component in Embodiment 3; Figure 12 is a schematic structural diagram of the first drive box in Embodiment 3; Figure 13 is a schematic structural diagram of the second drive box in Embodiment 3.

[0025] Description of the reference numerals: 1, cabinet body; 11, installation framework; 12, installation cover; 13, incoming line terminal; 14, outgoing line terminal; 15, cabinet door; 2, vacuum interrupter; 3, main shaft of the circuit breaker; 31, second driving assembly; 32, insulating pull rod; 321, first sliding cavity; 322, first spring; 323, pressure rod; 324, first sliding rod; 4, disconnector; 41, rotating shaft; 411, mounting rod; 412, first sliding groove; 413, rotating groove; 414, first avoidance groove; 415, second cavity; 416, second spring; 42, moving contact; 43, static contact; 44, first driving assembly; 45, first connecting rod; 46, connecting piece; 47, driving shaft; 471, mounting hole; 472, arc groove; 5, cover body; 6, first connecting assembly; 61, abutting plate; 611, second connecting rod; 612, airbag sheet; 613, limiting strip; 62, sliding cylinder; 621, second guiding block; 622, second guiding surface; 63, driving block; 631, first guiding block; 632, first guiding surface; 633, driving rod; 634, second pressing plate; 64, hydraulic box; 641, first cavity; 642, first pressing plate; 643, fifth communication pipe; 7, limiting assembly; 71, limiting plate; 711, limiting hole; 72, limiting rod; 8, airbag assembly; 81, airbag part; 82, first driving box; 821, second sliding cavity; 83, piston; 84, first communication pipe; 85, second communication pipe; 86, first one-way assembly; 861, first steel ball; 862, third spring; 863, first installation groove; 87, second one-way assembly; 871, second steel ball; 872, fourth spring; 873, second installation groove; 9, second connecting assembly; 91, second driving box; 911, third cavity; 912, third pressing plate; 92, third communication pipe; 93, fourth communication pipe; 94, third one-way assembly; 941, third steel ball; 942, fifth spring; 943, third installation groove; 95, fourth one-way assembly; 951, fourth steel ball; 952, sixth spring; 953, fourth installation groove. Detailed implementation manners

[0026] The following further describes the present application in detail with reference to the Figures 1-13 accompanying drawings. Embodiment 1

[0027] Embodiment 1 of the present application discloses a gas ring main unit. Refer to Figure 1, including a cabinet body 1 and an installation skeleton 11 arranged inside the cabinet body 1. An air inlet for inflating the cabinet body 1 and an air outlet for deflating are provided on the cabinet body 1. There are two installation skeletons 11, and the two installation skeletons 11 are distributed along the width direction of the cabinet body 1. The two installation skeletons 11 are respectively fixedly installed on the inner side surface of the cabinet body 1. An installation cover 12 is fixedly connected between the two installation skeletons 11. The opening of the installation cover 12 faces away from the center of the cabinet body 1, and the side of the installation cover 12 close to the opening is fixedly attached to the inner wall of the cabinet body 1.

[0028] Referring to Figure 1 and Figure 2 , this embodiment further includes a vacuum interrupter 2, a circuit breaker main shaft 3, and a disconnector 4. An incoming line terminal 13 is fixedly installed on the upper part of the cabinet body 1, and an outgoing line terminal 14 is fixedly installed on the lower part of the cabinet body 1. The vacuum interrupter 2 is fixedly connected to the outgoing line terminal 14. The circuit breaker main shaft 3 is located inside the installation cover 12, and the axis of the circuit breaker main shaft 3 is parallel to the width direction of the cabinet body 1. A second driving assembly 31 is fixedly installed on one side of the cabinet body 1. The second driving assembly 31 is a prior art and will not be specifically described in this embodiment. One end of the circuit breaker main shaft 3 rotatably penetrates the cabinet body 1 and is fixedly connected to the output shaft of the second driving assembly 31. A support plate is fixedly connected to the side of the installation cover 12 away from the second driving assembly 31. The support plate is located inside the installation cover 12, and the circuit breaker main shaft 3 rotatably penetrates the support plate.

[0029] The disconnector 4 is located above the vacuum interrupter 2. The disconnector 4 includes a rotating shaft 41, a moving contact 42, and a static contact 43. The axis direction of the rotating shaft 41 is parallel to the width direction of the cabinet body 1, and both ends of the rotating shaft 41 are rotatably connected to the installation skeleton 11. A first driving assembly 44 is fixedly installed on the outer side of the cabinet body 1. The first driving assembly 44 is a prior art and will not be specifically described in this embodiment. One end of the rotating shaft 41 is fixedly connected to the output shaft of the first driving assembly 44, so that the first driving assembly 44 can drive the rotation of the rotating shaft 41.

[0030] The moving contact 42 is fixedly installed on the rotating shaft 41. In this embodiment, there are several moving contacts 42, and the several moving contacts 42 are distributed along the axis direction of the rotating shaft 41. There are several static contacts 43 and they respectively correspond to several incoming line terminals 13. The static contacts 43 are fixedly installed below the incoming line terminals 13. The several moving contacts 42 respectively correspond to the several static contacts 43, and the rotating shaft 41 can drive the moving contact 42 to be connected with the corresponding static contact 43 through rotation.

[0031] Referring to Figure 2, a connecting piece 46 is provided at the lower end of the moving contact 42 for connecting with the vacuum interrupter 2. The upper end of the connecting piece 46 is fixedly connected with a first connecting rod 45. The upper end of the first connecting rod 45 is hinged to the lower end of the moving contact 42, so that when the rotating shaft 41 drives the moving contact 42 to rotate, the first connecting rod 45 will not be driven to move.

[0032] Referring to Figure 2 and Figure 3 , a plurality of insulating tie rods 32 are provided on the circuit breaker main shaft 3. The plurality of insulating tie rods 32 correspond to a plurality of moving contacts 42 respectively. One end of the insulating tie rod 32 is hinged to the circuit breaker main shaft 3. A pressure rod 323 is provided at the end of the insulating tie rod 32 far from the circuit breaker main shaft 3. A first sliding cavity 321 is formed inside the insulating tie rod 32. The first sliding cavity 321 and the insulating tie rod 32 are coaxially arranged. The pressure rod 323 is slidably connected to the first sliding cavity 321 along the axial direction of the insulating tie rod 32. A first sliding rod 324 is fixedly connected to the end of the pressure rod 323 far from the insulating tie rod 32. The first sliding rod 324 slidably penetrates through the lower end of the connecting piece 46. A first spring 322 is provided on the insulating tie rod 32. The first spring 322 is located inside the first sliding cavity 321. One end of the first spring 322 is fixedly connected to the cavity wall of the first sliding cavity 321, and the other end of the first spring 322 is fixedly connected to the pressure rod 323. When the circuit breaker main shaft 3 rotates, the pressure rod 323 can be driven to move towards the direction close to the connecting piece 46, so that the connecting piece 46 abuts against the vacuum interrupter 2.

[0033] A cover body 5 is fixedly installed on the installation cover 12. The first connecting rod 45 fixedly penetrates through the cover body 5. The connecting piece 46 is located inside the cover body 5. The cover body 5 covers the vacuum interrupter 2 and the connecting piece 46. The cover body 5 is made of insulating material. The end face of the cover body 5 at the opening abuts against and is fixedly installed on the side surface of the installation cover 12.

[0034] The implementation principle of Embodiment 1 of this application is as follows: In the existing ring main unit, high voltage is usually easily generated at the circuit breaker switch. Therefore, this application is provided with a cover body 5 made of insulating material. The vacuum interrupter 2 and the connecting piece 46 are covered inside the cover body 5. The cover body 5 plays a certain insulating role. Correspondingly, the insulation distance can be appropriately reduced, the width of the cabinet body 1 can be made smaller, thereby improving the compactness of the cabinet body 1 and reducing the floor area of the cabinet body 1. Embodiment 2

[0035] The difference between Embodiment 2 and Embodiment 1 is that, referring to Figure 4 and Figure 5, a drive shaft 47 is fixedly connected to the output shaft of the first drive assembly 44. A support frame is fixedly connected to the mounting skeleton 11 on the side close to the first drive assembly 44. The rotating shaft 41 is rotatably connected to the support frame, and the support frame is omitted in the attached drawings of the specification. The drive shaft 47 and the rotating shaft 41 are coaxially arranged. A first connection assembly 6 is arranged between the drive shaft 47 and the rotating shaft 41. Under normal conditions, the drive shaft 47 and the rotating shaft 41 are disconnected so that the drive shaft 47 cannot drive the rotating shaft 41 to rotate. When the main shaft 3 of the circuit breaker rotates to disconnect the connecting piece 46 from the vacuum interrupter 2, the first connection assembly 6 connects the drive shaft 47 and the rotating shaft 41.

[0036] Referring to Figure 5 and Figure 6 , a mounting rod 411 is coaxially and fixedly connected to the end face of the rotating shaft 41 close to the drive shaft 47. A mounting hole 471 is formed in the end face of the drive shaft 47, and the mounting rod 411 extends into the mounting rod 411. The first connection assembly 6 includes a contact plate 61 and a sliding cylinder 62. The sliding cylinder 62 is coaxially slidably sleeved on the mounting rod 411. A plurality of contact plates 61 are provided and are circumferentially arranged around the axis of the sliding cylinder 62. The length direction of the contact plate 61 is parallel to the axis direction of the sliding cylinder 62. A plurality of first sliding grooves 412 are formed in the end face of the rotating shaft 41 close to the drive shaft 47. The plurality of first sliding grooves 412 respectively correspond to the plurality of contact plates 61. The plurality of first sliding grooves 412 are radially distributed around the axis of the rotating shaft 41. The contact plate 61 is slidably connected to the first sliding groove 412.

[0037] Two second connecting rods 611 are arranged on the side of the contact plate 61 close to the sliding cylinder 62. The two second connecting rods 611 are distributed along the length direction of the contact plate 61. The two ends of the second connecting rod 611 are respectively hinged to the contact plate 61 and the outer peripheral wall of the sliding cylinder 62. When the sliding cylinder 62 slides towards the direction close to the drive shaft 47, the sliding cylinder 62 can force the plurality of contact plates 61 to slide away from each other through the second connecting rods 611 and abut against the hole wall of the mounting hole 471.

[0038] A rotating groove 413 is coaxially formed inside the rotating shaft 41. The connecting assembly further includes a driving block 63. The driving block 63 is rotatably connected to the rotating groove 413. A first guiding block 631 is formed on one side of the driving block 63 close to the sliding cylinder 62. There are several first guiding blocks 631, which are arranged in a circumferential array around the axis of the driving block 63. In this embodiment, the number of the first guiding blocks 631 is two. A first avoiding groove 414 communicating with the end face of the rotating shaft 41 close to the sliding cylinder 62 is formed on the side wall of the rotating groove 413. There are two first avoiding grooves 414. The two first guiding blocks 631 are respectively located in the two first sliding grooves 412. One side of the sliding cylinder 62 close to the driving block 63 has a second guiding block 621. In this embodiment, there are two first guiding blocks 631, which respectively correspond to the two first guiding blocks 631. The two second guiding blocks 621 respectively penetrate through the first avoiding grooves 414. One side of the first guiding block 631 has a first guiding surface 632. The first guiding surface 632 abuts against the second guiding surface 622. When the driving block 63 rotates, the sliding cylinder 62 is forced to slide towards the direction close to the driving shaft 47 through the cooperation of the first guiding surface 632 and the second guiding surface 622.

[0039] Referring to Figure 4 and Figure 7 , in order to drive the driving block 63 to rotate, a hydraulic box 64 is fixedly connected above the breaker main shaft 3 of the mounting cover 12. A first cavity 641 is formed inside the hydraulic box 64. The first cavity 641 is in a fan shape and is open on the side close to the breaker main shaft 3. A first pressing plate 642 is fixedly connected to the upper peripheral wall of the breaker main shaft 3. The first pressing plate 642 extends upwards into the first cavity 641. When the breaker main shaft 3 rotates to connect the connecting piece 46 with the vacuum interrupter, the first pressing plate 642 is located on the side of the first cavity 641 close to the insulating pull rod 32. The first pressing plate 642 can divide the first cavity 641 into two sealed chambers during the swinging process.

[0040] Referring to Figure 4 , Figure 7 and Figure 8, a second cavity 415 is formed on the side of the rotating shaft 41 away from the sliding cylinder 62. The second cavity 415 is fan-shaped. A driving rod 633 is coaxially and fixedly connected to the driving block 63. A second pressing plate 634 is fixedly connected to the lower peripheral wall of the end of the driving rod 633 away from the driving block 63. The second pressing plate 634 is located in the second cavity 415. During the swinging process, the second pressing plate 634 can divide the second cavity 415 into two sealed chambers. A fifth connecting pipe 643 is connected between the first cavity 641 and the second cavity 415. The fifth connecting pipe 643 is connected to the side of the first cavity 641 away from the insulating pull rod 32. The side of the first cavity 641 near the fifth connecting pipe 643, the fifth connecting pipe 643, and the side of the second cavity 415 near the fifth connecting pipe 643 are all filled with liquid. When the main shaft 3 of the circuit breaker rotates in the direction away from the insulating pull rod 32, the liquid in the first cavity 641 can be pressed into the second cavity 415 by the first pressing plate 642 to force the second pressing plate 634 to rotate, thereby forcing the driving block 63 to rotate.

[0041] In order to enable the abutting plate 61 to be reset to release the abutting state with the hole wall of the mounting hole 471, a second spring 416 is provided on the mounting rod 411. The second spring 416 is coaxially sleeved on the mounting rod 411. One end of the second spring 416 is fixedly connected to the end face of the sliding cylinder 62, and the other end of the first spring 322 is fixedly connected to the mounting rod 411.

[0042] Refer to Figure 5 and Figure 9 , in order to reduce the phenomenon of slipping of the abutting plate 61 during the process of the driving plate driving the rotation of the rotating shaft 41, an airbag sheet 612 is fixedly connected to the outer side surface of the abutting plate 61. A plurality of arc-shaped grooves 472 are formed on the hole wall of the mounting hole 471. The length direction of the arc-shaped grooves 472 is parallel to the axial direction of the mounting hole 471. The plurality of arc-shaped grooves 472 are arranged in a circumferential array around the axial direction of the mounting hole 471. When the abutting plate 61 moves towards the hole wall of the mounting hole 471, the airbag sheet 612 deforms, so that a part of the airbag sheet 612 is clamped in the arc-shaped grooves 472 to limit the abutting plate 61 and the driving shaft 47, thereby reducing the possibility of slipping.

[0043] Two limiting strips 613 are fixedly connected to the outer side surface of the abutting plate 61. The limiting strips 613 are arc-shaped. The two limiting strips 613 are respectively located on both sides of the airbag distributed in the width direction. The thickness of the limiting strip 613 is smaller than the thickness of the airbag sheet 612. The arc length of the side of the limiting strip 613 away from the abutting plate 61 is greater than the arc length of the arc-shaped groove 472 at the opening, so that the limiting strip 613 will not be stuck in the arc-shaped groove 472. The two sides of the airbag sheet 612 are limited by the limiting strip 613, so that the airbag sheet 612 will not expand to both sides during deformation, which is beneficial to increasing the depth of the airbag sheet 612 stuck in the arc-shaped groove 472 during deformation, thereby improving the stability of the driving shaft 47 driving the rotating shaft 41 to rotate.

[0044] The implementation principle of Embodiment 2 is as follows: Since when operating the disconnector 4, it is necessary to ensure that the voltage difference on both sides is extremely small and there is no current flowing through, otherwise the arc generated during operation will seriously damage the switchgear. Therefore, a first connection component 6 is provided. Only when the main shaft 3 of the circuit breaker rotates to disconnect the connecting piece 46 and the vacuum interrupter 2, the first connection component 6 will connect the driving shaft 47 and the rotating shaft 41, and at this time the driving shaft 47 can drive the rotating shaft 41 to rotate, thereby reducing the possibility of equipment damage caused by misoperation. Embodiment 3

[0045] The difference between Embodiment 3 and Embodiment 2 is that, referring to Figure 10 , one side of the cabinet body 1 is provided with an opening. The cabinet body 1 is provided with a cabinet door 15. One side of the cabinet door 15 is hinged to the cabinet body 1, and the opening can be hermetically closed through the cabinet door 15.

[0046] Referring to Figure 1 、 Figure 10 and Figure 11 , the cabinet body 1 is provided with a limiting component 7, and the limiting component 7 is used for limiting and fixing the free end of the cabinet door 15. An airbag component 8 is arranged in the cabinet body 1. When the inside of the cabinet body 1 is filled with high pressure, the airbag component 8 can drive the limiting component 7 to limit the free end of the cabinet door 15; a second connection component 9 is arranged on the rotating shaft 41. When the moving contact 42 is connected to the static contact 43, the second connection component 9 drives the limiting component 7 to limit the free end of the cabinet door 15.

[0047] Referring to Figure 10 and Figure 11, the limiting component 7 includes a limiting plate 71 and a limiting rod 72. The limiting plate 71 is semi-circular in shape. The limiting plate 71 is located at the free end of the cabinet door 15. The limiting plate 71 is fixedly connected to the side surface of the cabinet door 15 close to the cabinet body 1. A limiting hole 711 is formed through the upper side surface of the limiting plate 71. The limiting rod 72 is located below the limiting plate 71. The limiting rod 72 is slidably connected to the inner wall of the cabinet body 1 in the vertical direction. By sliding the limiting rod 72, the limiting rod 72 is inserted into the limiting hole 711, so that the cabinet door 15 can be fixed to further limit the cabinet door 15.

[0048] Referring to Figure 11 and Figure 12 , the airbag component 8 includes an airbag part 81, a first driving box 82, a piston 83, a first connecting pipe 84 and a second connecting pipe 85. The airbag part 81 and the first driving box 82 are both fixedly installed on the inner wall of the cabinet body 1. The first driving box 82 is located below the limiting rod 72. A second sliding cavity 821 is formed in the first driving box 82. The piston 83 is slidably connected to the second sliding cavity 821 in the vertical direction. The lower end of the limiting rod 72 is fixedly connected to the upper surface of the piston 83. One end of the first connecting pipe 84 communicates with the airbag part 81, and the other end of the first connecting pipe 84 communicates with the lower part of the second sliding cavity 821. A first one-way component 86 is arranged at the connection between the first connecting pipe 84 and the second sliding cavity 821 so that gas can only flow from the airbag part 81 to the second sliding cavity 821. One end of the second connecting pipe 85 communicates with the airbag part 81, and the other end of the second connecting pipe 85 communicates with the lower part of the second sliding cavity 821. A second one-way component 87 is arranged at the connection between the second connecting pipe 85 and the second sliding cavity 821 so that gas can only flow from the second sliding cavity 821 to the airbag part 81.

[0049] The first one-way component 86 includes a third spring 862 and a first steel ball 861. A first installation groove 863 is formed in the peripheral wall of the first driving box 82. A first through hole is formed on one side of the first installation groove 863 for communicating with the first connecting pipe 84. A second through hole is formed on the other side of the first installation groove 863 for communicating with the second sliding cavity 821. The third spring 862 is fixedly installed on the side wall of the first installation groove 863 through a connecting plate. The first steel ball 861 is fixedly connected to the other end of the third spring 862. The third spring 862 forces the first steel ball 861 to block the first through hole.

[0050] The second one-way component 87 includes a fourth spring 872 and a second steel ball 871. A second installation groove 873 is formed in the peripheral wall of the first driving box 82. A third through hole is formed in one side of the second installation groove 873 for communicating with the second connecting pipe 85, and a fourth through hole is formed in the other side of the second installation groove 873 for communicating with the second sliding cavity 821. The fourth spring 872 is fixedly connected to the side wall of the second installation groove 873 through a connecting plate, and the second steel ball 871 is fixedly connected to the other end of the fourth spring 872. The fourth spring 872 forces the second steel ball 871 to block the fourth through hole.

[0051] Referring to Figures 11-13 , the second connecting component 9 includes a second driving box 91, a third connecting pipe 92 and a fourth connecting pipe 93. The second driving box 91 is located below the rotating shaft 41 and fixedly connected to the installation skeleton 11. A third cavity 911 is formed in the second driving box 91. The third cavity 911 is fan-shaped. A third pressing plate 912 is fixedly connected to the lower peripheral wall of the rotating shaft 41. The third pressing plate 912 extends into the third cavity 911. During the process of rotating and swinging following the rotating shaft 41, the third pressing plate 912 can divide the third cavity 911 into two sealed chambers. One end of the third connecting pipe 92 communicates with the third cavity 911, and the other end of the third connecting pipe 92 communicates with the lower part of the second sliding cavity 821. A third one-way component 94 is provided at the communicating part of the third connecting pipe 92 and the second sliding cavity 821 so that gas can only flow from the third cavity 911 to the second sliding cavity 821. One end of the fourth connecting pipe 93 communicates with the third cavity 911, and the other end of the fourth connecting pipe 93 communicates with the lower part of the second sliding cavity 821. A fourth one-way component 95 is provided at the communicating part of the fourth connecting pipe 93 and the second sliding cavity 821 so that gas can only flow from the second sliding cavity 821 to the third cavity 911.

[0052] The third one-way component 94 includes a fifth spring 942 and a third steel ball 941. A third installation groove 943 is formed in the peripheral wall of the first driving box 82. A fifth through hole is formed in one side of the third installation groove 943 for communicating with the third connecting pipe 92, and a sixth through hole is formed in the other side of the third installation groove 943 for communicating with the second sliding cavity 821. The fifth spring 942 is fixedly connected to the side wall of the third installation groove 943 through a connecting plate, and the third steel ball 941 is fixedly connected to the other end of the fifth spring 942. The fifth spring 942 forces the third steel ball 941 to block the fifth through hole.

[0053] The fourth one-way component 95 includes a sixth spring 952 and a fourth steel ball 951. A fourth installation groove 953 is formed in the circumference of the first driving box 82. A seventh through hole is formed on one side of the fourth installation groove 953 for communicating with the fourth connecting pipe 93, and an eighth through hole is formed on the other side of the fourth installation groove 953 for communicating with the second sliding cavity 821. The sixth spring 952 is fixedly connected to the side wall of the fourth installation groove 953 through a connecting plate, and the fourth steel ball 951 is fixedly connected to the other end of the sixth spring 952. The sixth spring 952 forces the fourth steel ball 951 to block the eighth through hole.

[0054] The implementation principle of Embodiment 3 is as follows: An airbag component 8 and a second connection component 9 are provided. When the cabinet body 1 is filled with high pressure and the disconnector 4 is not disconnected, the limiting component 7 can limit the cabinet door 15, so that the staff cannot open the cabinet door 15, thus ensuring the safety of the staff.

[0055] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A gas ring main unit, characterized in that: It includes a vacuum interrupter (2), a circuit breaker main shaft (3), a disconnector (4) and a cabinet body (1). An incoming line terminal (13) is arranged at the upper part of the cabinet body (1), and an outgoing line terminal (14) is arranged at the lower part of the cabinet body (1). The vacuum interrupter (2) is connected to the outgoing line terminal (14). The upper end of the disconnector (4) is connected to the incoming line terminal (13), and a connecting piece (46) is arranged at the lower end of the disconnector (4) for connecting with the vacuum interrupter (2). An installation cover (12) is arranged on the cabinet body (1), and a cover body (5) is arranged on the installation cover (12). The cover body (5) covers the vacuum interrupter (2) and the connecting piece (46). The cover body (5) is made of insulating material, and the end face of the cover body (5) at the opening abuts against the side face of the installation cover (12).

2. The gas ring main cabinet according to claim 1, characterized in that: An insulating pull rod (32) is arranged on the circuit breaker main shaft (3), and a pressure rod (323) is arranged on the insulating pull rod (32). The pressure rod (323) is used for connecting with the connecting piece (46), and one end of the insulating pull rod (32) is hinged to the circuit breaker main shaft (3).

3. The gas ring main cabinet according to claim 2, wherein: The pressure rod (323) is slidably connected to the insulating pull rod (32) along the axial direction. A first spring (322) is arranged on the insulating pull rod (32). The first spring (322) forces the pressure rod (323) to move towards the connecting piece (46). The disconnector (4) includes a rotating shaft (41), a moving contact (42) and a static contact (43). Both ends of the rotating shaft (41) are rotatably connected to the cabinet body (1). The moving contact (42) is arranged on the rotating shaft (41). The static contact (43) is connected to the incoming line terminal (13). The rotating shaft (41) can drive the moving contact (42) to connect with the static contact (43) through rotation.

4. The gas ring main cabinet according to claim 3, wherein: A first driving component (44) is arranged on the cabinet body (1). A driving shaft (47) is rotatably connected to the cabinet body (1). The first driving component (44) is used for driving the driving shaft (47) to rotate. The driving shaft (47) and the rotating shaft (41) are coaxially arranged. A first connecting component (6) is arranged between the driving shaft (47) and the rotating shaft (41). Under normal conditions, the driving shaft (47) and the rotating shaft (41) are disconnected so that the driving shaft (47) cannot drive the rotating shaft (41) to rotate. After the circuit breaker main shaft (3) rotates to disconnect the connecting piece (46) from the vacuum interrupter (2), the first connecting component (6) connects the driving shaft (47) and the rotating shaft (41).

5. The gas ring main cabinet according to claim 4, characterized in that: The first connecting component (6) includes an abutting plate (61) and a sliding cylinder (62). A plurality of the abutting plates (61) are provided and are distributed in a circumferential array along the axial direction of the rotating shaft (41). The length direction of the abutting plate (61) is parallel to the axial direction of the rotating shaft (41). One end of the abutting plate (61) is slidably connected to the rotating shaft (41) in the radial direction of the rotating shaft (41). The sliding cylinder (62) is slidably connected to the rotating shaft (41) in the axial direction. Two second connecting rods (611) are provided on the abutting plate (61). The two second connecting rods (611) are respectively and parallelly arranged along the length direction of the abutting plate (61). The two ends of the second connecting rod (611) are respectively hinged to the abutting plate (61) and the sliding cylinder (62). An installation hole (471) is formed in the end face of the driving shaft (47). A plurality of the abutting plates (61) are located in the installation hole (471).

6. A gas ring main cabinet according to claim 5, characterized in that: The first connecting component (6) further includes a driving block (63). The driving block (63) is rotatably connected to the rotating shaft (41). The driving block (63) and the sliding cylinder (62) are coaxially arranged. A first guiding block (631) is provided on the driving block (63). A plurality of the first guiding blocks (631) are provided and are distributed in a circumferential array around the axis of the driving block (63). One side of the first guiding block (631) has a first guiding surface (632). One side of the sliding cylinder (62) close to the driving block (63) has a second guiding block (621). A plurality of the second guiding blocks (621) are provided and are distributed in a circumferential array along the axial direction of the sliding cylinder (62). One side of the second guiding block (621) is provided with a second guiding surface (622). The first guiding surface (632) abuts against the second guiding surface (622). When the driving block (63) rotates, the sliding cylinder (62) is forced to slide in the direction close to the driving shaft (47) through the cooperation of the first guiding surface (632) and the second guiding surface (622).

7. A gas ring main unit according to claim 6, characterized in that: Above the circuit breaker main shaft (3) of the cabinet body (1), a hydraulic box (64) is provided. A first cavity (641) is arranged inside the hydraulic box (64). On the side of the rotating shaft (41) away from the sliding cylinder (62) of the driving block (63), a second cavity (415) is provided. The second cavity (415) is fan-shaped. The driving block (63) is coaxially provided with a driving rod (633). A second pressing plate (634) is arranged on the driving rod (633). The second pressing plate (634) is located inside the second cavity (415). The circuit breaker main shaft (3) is provided with a first pressing plate (642) located inside the first cavity (641). A fifth communication pipe (643) is connected between the first cavity (641) and the second cavity (415). The side of the first cavity (641) close to the fifth communication pipe (643), the fifth communication pipe (643), and the side of the second cavity (415) close to the fifth communication pipe (643) are all filled with liquid. When the circuit breaker main shaft (3) rotates, the liquid in the first cavity (641) can be pressed into the second cavity (415) through the first pressing plate (642) to force the second pressing plate (634) to rotate.

8. The gas ring main cabinet according to claim 5, characterized in that: An airbag sheet (612) is arranged on the outer side surface of the abutting plate (61). A plurality of arc-shaped grooves (472) are arranged around the hole wall of the mounting hole (471). Two limiting strips (613) are arranged on the outer side surface of the abutting plate (61). The limiting strips (613) are arc-shaped. The two limiting strips (613) are respectively located on both sides of the airbag distributed along the width direction. The thickness of the limiting strip (613) is smaller than the thickness of the airbag sheet (612). The arc length of the side of the limiting strip (613) away from the abutting plate (61) is greater than the arc length of the arc-shaped groove (472) at the opening.

9. The gas ring main cabinet according to claim 3, wherein: A cabinet door (15) is arranged on one side of the cabinet body (1). One side of the cabinet door (15) is hinged to the cabinet body (1). The cabinet body (1) is provided with a limiting component (7) for limiting and fixing the free end of the cabinet door (15). An airbag component (8) is arranged inside the cabinet body (1). When the inside of the cabinet body (1) is filled with high pressure, the airbag component (8) can drive the limiting component (7) to limit the free end of the cabinet door (15). The rotating shaft (41) is provided with a second connection component (9). When the moving contact (42) is connected to the static contact (43), the second connection component (9) drives the limiting component (7) to limit the free end of the cabinet door (15).

10. A gas ring main cabinet according to claim 9, characterized in that: The limiting component (7) includes a limiting plate (71) provided on the cabinet door (15) and a limiting rod (72) provided on the inner wall of the cabinet body (1). A limiting hole (711) for inserting the limiting rod (72) is formed on the limiting plate (71). The airbag component (8) includes an airbag part (81), a first driving box (82), a piston (83), and a first connecting pipe (84) provided on the inner wall of the cabinet body (1). Under normal conditions, the airbag part (81) is inflated and expanded. A second sliding cavity (821) is provided in the first driving box (82). The piston (83) is slidably connected to the second sliding cavity (821). The two ends of the first connecting pipe (84) are respectively communicated with the airbag part (81) and the lower part of the second sliding cavity (821).

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