A gas ring network cabinet

Abstract

The present application relates to the field of ring main unit (RMU), and in particular to a gas RMU comprising a vacuum interrupter, a circuit breaker spindle, an isolating switch, and a cabinet body. The upper portion of the cabinet body is provided with an inlet terminal, the lower portion of the cabinet body is provided with an outlet terminal, the vacuum interrupter is connected to the outlet terminal, the upper end of the isolating switch is connected to the inlet terminal, the lower end of the isolating switch is provided with a connecting piece for connecting to the vacuum interrupter, the cabinet body is provided with a mounting cover, the mounting cover is provided with a cover body, 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 mounting cover. The present application has the effect of making the RMU more compact.

Description

Technical Field

[0001] The present application relates to the field of ring main unit (RMU), and in particular to a gas ring main unit (RMU). Background Art

[0002] A gas ring main unit (RMU) is a key electrical equipment used in medium-voltage power distribution systems. Its core feature is that it passes insulating gas (primarily SF6 or environmentally friendly alternative gases) through the cabinet, reducing its conductivity and thus achieving insulation. To ensure adequate insulation distance, there are typically certain restrictions on the minimum internal spacing of the RMU. The wider the RMU's internal space, the greater the insulation distance and the better the insulation effect. However, this can result in a less compact RMU, increasing its footprint. Summary of the Invention

[0003] In order to make the ring main unit more compact and reduce the floor space of the ring main unit, the present application provides a gas ring main unit.

[0004] The present application provides a gas ring main unit, which adopts the following technical solution:

[0005] A gas ring network cabinet includes a vacuum interrupter, a circuit breaker main shaft, an isolating switch and a cabinet body. The upper part of the cabinet body is provided with an incoming line terminal, and the lower part of the cabinet body is provided with an outgoing line terminal. The vacuum interrupter is connected to the outgoing line terminal, the upper end of the isolating switch is connected to the incoming line terminal, and the lower end of the isolating switch is provided with a connecting piece for connecting to the vacuum interrupter. The cabinet body is provided with a mounting cover, and a cover body is provided on the mounting 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 located at the opening abuts against the side face of the mounting cover.

[0006] By adopting the above-mentioned technical solution, the existing ring network cabinet is usually prone to generate high voltage at the circuit breaker switch. Therefore, the present application is provided with a cover body, which is made of insulating material. The vacuum arc chamber and the connecting piece are covered in the cover body. The cover body has a certain insulation effect, and the insulation distance can be appropriately reduced accordingly, so that the width of the cabinet becomes smaller, thereby improving the compactness of the cabinet and reducing the floor space of the cabinet.

[0007] Optionally, an insulating pull rod is provided on the circuit breaker main shaft, and a pressure rod is provided on the insulating pull rod. The pressure rod is used to be connected to the connecting piece, and one end of the insulating pull rod is hinged to the circuit breaker main shaft.

[0008] Optionally, the pressure rod is connected to the insulating pull rod by sliding along the axial direction, and a first spring is provided on the insulating pull rod, and the first spring forces the pressure rod to move in the direction close to the connecting piece; the isolating 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 provided on the rotating shaft, and the static contact is connected to the incoming line end, and the rotating shaft can drive the moving contact and the static contact to connect by rotating.

[0009] By adopting the above technical solution, the rotating shaft rotates to control the connection between the moving contact and the static contact. When the power needs to be disconnected, the rotating shaft controls the moving contact and the static contact to disconnect, thereby forming a clear, visible and reliable physical disconnection point, thereby ensuring the safety of personnel and equipment.

[0010] Optionally, a first drive assembly is provided on the cabinet body, and a drive shaft is rotatably connected to the cabinet body. The first drive assembly is used to drive the drive shaft to rotate. The drive shaft and the rotating shaft are coaxially arranged. A first connecting assembly is provided between the drive shaft and the rotating shaft. Under normal circumstances, the drive shaft and the rotating shaft are disconnected so that the drive shaft cannot drive the rotating shaft to rotate. When the main shaft of the circuit breaker rotates so that the connecting piece and the vacuum interrupter are disconnected, the first connecting assembly connects the drive shaft and the rotating shaft.

[0011] By adopting the above technical solution, when operating the disconnector, it is necessary to ensure that the voltage difference on both sides is extremely small and no current flows, otherwise the arc generated during operation will seriously damage the switchgear. 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 drive shaft and the rotating shaft. At this time, the drive shaft can drive the rotating shaft to rotate, thereby reducing the possibility of equipment damage caused by misoperation.

[0012] Optionally, the first connecting component includes an abutment plate and a sliding cylinder, and the abutment plates are provided in a plurality and are distributed in a circular array around the axial direction of the rotating shaft. The length direction of the abutment plate is parallel to the axial direction of the rotating shaft, one end of the abutment plate is connected to the rotating shaft by sliding along the radial direction of the rotating shaft, and the sliding cylinder is connected to the rotating shaft by sliding along the axial direction. Two second connecting rods are provided on the abutment plate, and the two second connecting rods are respectively and parallelly provided along the length direction of the abutment plate. Both ends of the second connecting rod are respectively hinged to the abutment plate and the sliding cylinder, and a mounting hole is opened on the end face of the driving shaft, and the plurality of the abutment plates are located in the mounting hole.

[0013] By adopting the above technical solution, when the rotating shaft and the driving shaft need to be connected, the sliding cylinder is slid. After sliding, the sliding cylinder will drive several abutment plates to be stretched outward through the second connecting rod, so that the abutment 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.

[0014] Optionally, the first connecting assembly also includes a driving block, which is rotatably connected to the rotating shaft, and the driving block and the sliding cylinder are coaxially arranged. The driving block is provided with a first guide block, and the first guide blocks are provided with a plurality of them and are distributed in a circular array around the axis of the driving block. One side of the first guide block has a first guide surface, and the side of the sliding cylinder close to the driving block has a second guide block, and the second guide blocks are provided with a plurality of them and are distributed in a circular array around the axis direction of the sliding cylinder. Several first guide blocks and several second guide blocks are alternately arranged, and one side of the first guide block is provided with a second guide surface, and the first guide surface abuts the second guide surface. When the driving block rotates, the sliding cylinder is forced to slide in a direction close to the driving shaft through the cooperation of the first guide surface and the second guide surface.

[0015] By adopting the above technical solution, a driving block is provided. By rotating the driving block, the sliding cylinder is forced to slide in the direction close to the driving shaft through the cooperation of the first guide surface and the second guide surface, so that several abutment plates are stretched outward and abut against the inner wall of the mounting hole to connect the driving shaft and the rotating shaft.

[0016] Optionally, the cabinet is provided with a hydraulic box located above the circuit breaker main shaft, and a first cavity is provided in the hydraulic box, and a second cavity is provided on the rotating shaft on the side of the driving block away from the sliding cylinder, and the second cavity is fan-shaped, and the driving block is coaxially provided with a driving rod, and a second pressure plate is provided on the driving rod, and the second pressure plate is located in the second cavity, and the circuit breaker main shaft is provided with a first pressure plate located in the first cavity, and a fifth connecting pipe is connected between the first cavity and the second cavity, and the side of the first cavity close to the fifth connecting pipe, the fifth connecting pipe and the side of the second cavity close to the fifth connecting pipe are all filled with liquid, and when the circuit breaker main shaft rotates, the liquid in the first cavity can be pressed into the second cavity through the first pressure plate to force the second pressure plate to rotate.

[0017] By adopting the above technical solution, when the circuit breaker main shaft rotates, it will drive the first pressure plate to press the liquid in the first cavity into the second cavity, thereby causing the second pressure plate to rotate, and then drive the drive rod to rotate, thereby driving the drive block to rotate, and forcing the sliding cylinder to slide through the first guide surface and the second guide surface to connect the drive shaft and the rotating shaft.

[0018] Optionally, an airbag sheet is provided on the outer side surface of the abutment plate, and a plurality of arc-shaped grooves are provided around the hole wall of the mounting hole. Two limit strips are provided on the outer side surface of the abutment plate, and the limit strips are arc-shaped. The two limit strips are respectively located on both sides of the airbag along the width direction. The thickness of the limit strip is smaller than the thickness of the airbag sheet, and the arc length of the limit strip away from the abutment plate is greater than the arc length of the arc groove at the opening.

[0019] By adopting the above technical solution, first, when the abutment plate moves toward the hole wall close to the mounting hole, the airbag sheet is deformed, so that the airbag sheet is partially stuck in the arc groove, limiting the abutment plate and the drive shaft to reduce the possibility of slipping; secondly, the airbag sheet is limited on both sides by the limiting strip, so that the airbag sheet will not expand to both sides when deformed, which is beneficial to increase the depth of the airbag sheet stuck in the arc groove when deformed, thereby improving the stability of the driving shaft driving the rotating shaft to rotate.

[0020] Optionally, a cabinet door is provided on one side of the cabinet body, and one side of the cabinet door is hinged to the cabinet body. The cabinet body is provided with a limiting assembly for limiting and fixing the free end of the cabinet door. An airbag assembly is provided in the cabinet body. When the cabinet body is filled with high pressure, the airbag assembly can drive the limiting assembly to limit the free end of the cabinet door. The rotating shaft is provided with a second connecting assembly. When the moving contact is connected to the static contact, the second connecting assembly drives the limiting assembly to limit the free end of the cabinet door.

[0021] By adopting the above technical solution, an airbag assembly and a second connecting assembly are provided. When the cabinet is filled with high voltage and the isolating switch is not disconnected, the limit assembly can limit the cabinet door so that the staff cannot open the cabinet door, thereby ensuring the safety of the staff.

[0022] Optionally, the limit assembly includes a limit plate arranged on the cabinet door and a limit rod arranged on the inner wall of the cabinet, and the limit plate is provided with a limit hole for inserting the limit rod. The airbag assembly includes an airbag part arranged on the inner wall of the cabinet, a first drive box, a piston and a first connecting pipe. Under normal circumstances, the airbag part is inflated and expanded, and a second sliding chamber is provided in the first drive box. The piston is slidably connected to the second sliding chamber, and both ends of the first connecting pipe are respectively connected to the airbag part and the lower part of the second sliding chamber.

[0023] By adopting the above technical solution, when the airbag part is set in the cabinet, the cabinet will be filled with gas for insulation when the equipment is in operation. At this time, the air pressure in the cabinet is high, which will cause the airbag part to become smaller and squeeze the internal gas into the second sliding cavity through the third connecting tube, thereby causing the piston to slide and drive the limit rod to be inserted into the limit hole, so that when the cabinet is filled with high pressure, the cabinet door cannot be opened.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] Existing ring main units are usually prone to high voltage at the circuit breaker switch. Therefore, the present application is provided with a cover body, which is made of insulating material and covers the vacuum interrupter and the connecting piece. The cover body has a certain insulation effect and can appropriately reduce the insulation distance accordingly, making the width of the cabinet smaller, thereby improving the compactness of the cabinet and reducing the cabinet footprint;

[0026] When operating the disconnector, it is necessary to ensure that the voltage difference on both sides is extremely small and no current flows, otherwise the arc generated during operation will seriously damage the switchgear. 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 drive shaft and the rotating shaft. 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

[0027] Figure 1 is a schematic structural diagram of Example 1;

[0028] Figure 2 is a schematic structural diagram of the cover body in Example 1;

[0029] Figure 3 is a schematic structural diagram of the insulating pull rod in Example 1;

[0030] Figure 4 is a structural diagram of Example 2;

[0031] Figure 5 is a schematic diagram of the connection between the drive shaft and the rotating shaft in Example 2;

[0032] Figure 6 is a schematic structural diagram of the rotating shaft in Example 2;

[0033] Figure 7 is a schematic structural diagram of the hydraulic box in Example 2;

[0034] Figure 8 is a schematic structural diagram of the driving rod in Example 2;

[0035] Figure 9 is a schematic structural diagram of the abutment plate in Example 2;

[0036] Figure 10 is a schematic structural diagram of Example 3;

[0037] Figure 11 is a schematic structural diagram of the limit assembly in Example 3;

[0038] Figure 12is a schematic structural diagram of the first drive box in Example 3;

[0039] Figure 13 It is a structural diagram of the second drive box in Example 3.

[0040] Explanation of reference numerals: 1. cabinet; 11. mounting frame; 12. mounting cover; 13. inlet terminal; 14. outlet terminal; 15. cabinet door; 2. vacuum interrupter; 3. circuit breaker main shaft; 31. second drive 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 air chamber Cavity; 416, second spring; 42, moving contact; 43, static contact; 44, first drive assembly; 45, first connecting rod; 46, connecting plate; 47, drive shaft; 471, mounting hole; 472, arc groove; 5, cover; 6, first connecting assembly; 61, abutment plate; 611, second connecting rod; 612, airbag plate; 613, limit strip; 62, sliding cylinder; 621, second guide block; 622, second guide surface; 63, drive block; 631, first guide block; 632, first guide Surface; 633, driving rod; 634, second pressure plate; 64, hydraulic box; 641, first cavity; 642, first pressure plate; 643, fifth connecting pipe; 7, limit assembly; 71, limit plate; 711, limit hole; 72, limit rod; 8, airbag assembly; 81, airbag part; 82, first driving box; 821, second sliding cavity; 83, piston; 84, first connecting pipe; 85, second connecting pipe; 86, first one-way assembly; 861, first steel ball; 862, third spring; 863, first A mounting slot; 87, a second one-way component; 871, a second steel ball; 872, a fourth spring; 873, a second mounting slot; 9, a second connecting component; 91, a second drive box; 911, a third cavity; 912, a third pressure plate; 92, a third connecting pipe; 93, a fourth connecting pipe; 94, a third one-way component; 941, a third steel ball; 942, a fifth spring; 943, a third mounting slot; 95, a fourth one-way component; 951, a fourth steel ball; 952, a sixth spring; 953, a fourth mounting slot. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-13 This application is described in further detail. Example 1

[0042] Example 1 of the present application discloses a gas ring network cabinet. Figure 1The cabinet 1 includes a cabinet body 1 and a mounting frame 11 disposed within the cabinet body 1. The cabinet body 1 is provided with an air inlet for inflating the cabinet body 1 and an air outlet for deflation. Two mounting frames 11 are provided, distributed along the width of the cabinet body 1. The two mounting frames 11 are respectively fixedly mounted on the inner side surface of the cabinet body 1. A mounting cover 12 is fixedly connected between the two mounting frames 11. The opening of the mounting cover 12 faces a side away from the center of the cabinet body 1, and the side of the mounting cover 12 near the opening is fixedly fixed to the inner wall of the cabinet body 1.

[0043] Reference Figure 1 and Figure 2 This embodiment further includes a vacuum interrupter 2, a circuit breaker main shaft 3, and a disconnector 4. An inlet terminal 13 is fixedly mounted on the upper portion of the cabinet 1, and an outlet terminal 14 is fixedly mounted on the lower portion of the cabinet 1. The vacuum interrupter 2 is fixedly connected to the outlet terminal 14. The circuit breaker main shaft 3 is located within the mounting cover 12, and the axis of the circuit breaker main shaft 3 is parallel to the width of the cabinet 1. A second drive assembly 31 is fixedly mounted on one side of the cabinet 1. The second drive assembly 31 is prior art and will not be described in detail in this embodiment. One end of the circuit breaker main shaft 3 is rotatably mounted in the cabinet 1 and fixedly connected to the output shaft of the second drive assembly 31. A support plate is fixedly connected to the side of the mounting cover 12 away from the second drive assembly 31. The support plate is located within the mounting cover 12, and the circuit breaker main shaft 3 is rotatably mounted on the support plate.

[0044] The disconnector 4 is located above the vacuum interrupter 2 and includes a rotating shaft 41, a moving contact 42, and a stationary contact 43. The axial direction of the rotating shaft 41 is parallel to the width of the cabinet 1, and both ends of the rotating shaft 41 are rotatably connected to the mounting frame 11. A first drive assembly 44 is fixedly mounted on the outside of the cabinet 1. The first drive assembly 44 is conventional and will not be described in detail in this embodiment. One end of the rotating shaft 41 is fixedly connected to the output shaft of the first drive assembly 44, so that the first drive assembly 44 can drive the disconnector to rotate.

[0045] A moving contact 42 is fixedly mounted on the rotating shaft 41. In this embodiment, a plurality of moving contacts 42 are provided, distributed along the axis of the rotating shaft 41. A plurality of stationary contacts 43 are provided, each corresponding to a plurality of incoming wire terminals 13. The stationary contacts 43 are fixedly mounted below the incoming wire terminals 13. The plurality of moving contacts 42 correspond to a plurality of stationary contacts 43, respectively. The rotating shaft 41 rotates to drive the moving contacts 42 to connect with the corresponding stationary contacts 43.

[0046] Reference Figure 2The lower end of the moving contact 42 is provided with a connecting piece 46 for connecting to the vacuum interrupter 2. The upper end of the connecting piece 46 is fixedly connected to the 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 mobilizes the moving contact 42 to rotate, it will not drive the first connecting rod 45 to move.

[0047] Reference Figure 2 and Figure 3 The circuit breaker main shaft 3 is provided with several insulating rods 32, each corresponding to a plurality of moving contacts 42. One end of the insulating rod 32 is hinged to the circuit breaker main shaft 3. A pressure rod 323 is provided at the end of the insulating rod 32 away from the circuit breaker main shaft 3. A first sliding cavity 321 is defined within the insulating rod 32. The first sliding cavity 321 and the insulating rod 32 are coaxially arranged. The pressure rod 323 is slidably connected to the first sliding cavity 321 along the axis of the insulating rod 32. The end of the pressure rod 323 away from the insulating rod 32 is fixedly connected to a first sliding rod 324, which slides through the lower end of the connecting piece 46. A first spring 322 is provided on the insulating pull rod 32. The first spring 322 is located in 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, it can drive the pressure rod 323 to move toward the direction close to the connecting piece 46, so that the connecting piece 46 abuts against the vacuum interrupter 2.

[0048] A cover body 5 is fixedly installed on the mounting cover 12, a first connecting rod 45 is fixedly passed through the cover body 5, a connecting piece 46 is located inside the cover body 5, and the cover body 5 covers the vacuum arc chamber 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 is abutted and fixedly installed on the side of the mounting cover 12.

[0049] The implementation principle of Example 1 of the present application is: the existing ring network cabinet is usually prone to high voltage at the circuit breaker switch, so the present application is provided with a cover body 5, which is made of insulating material, and the vacuum arc chamber 2 and the connecting piece 46 are covered in the cover body 5. The cover body 5 has a certain insulation effect, and correspondingly, the insulation distance can be appropriately reduced, and the width of the cabinet body 1 can be reduced, thereby improving the compactness of the cabinet body 1 and reducing the floor area of ​​the cabinet body 1. Example 2

[0050] The difference between Example 2 and Example 1 is that, referring to Figure 4 and Figure 5A drive shaft 47 is fixedly connected to the output shaft of the first drive assembly 44. A support bracket is fixedly connected to the mounting frame 11 near the first drive assembly 44. The rotating shaft 41 is rotatably connected to the support bracket. The support bracket is omitted in the drawings. The drive shaft 47 and the rotating shaft 41 are coaxially arranged. A first connecting assembly 6 is disposed between the drive shaft 47 and the rotating shaft 41. Under normal circumstances, 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 circuit breaker main shaft 3 rotates, disconnecting the connecting piece 46 from the vacuum interrupter 2, the first connecting assembly 6 connects the drive shaft 47 and the rotating shaft 41.

[0051] Reference Figure 5 and Figure 6 The end surface of the rotating shaft 41 near the drive shaft 47 is coaxially fixedly connected to a mounting rod 411. The end surface of the drive shaft 47 is provided with a mounting hole 471, and the mounting rod 411 extends into the mounting rod 411. The first connecting assembly 6 includes an abutment plate 61 and a sliding cylinder 62. The sliding cylinder 62 is coaxially slidably sleeved with the mounting rod 411. There are a plurality of abutment plates 61 arranged in a circumferential array around the axis of the sliding cylinder 62. The length direction of the abutment plates 61 is parallel to the axis of the sliding cylinder 62. The end surface of the rotating shaft 41 near the drive shaft 47 is provided with a plurality of first sliding grooves 412. The plurality of first sliding grooves 412 respectively correspond to the plurality of abutment plates 61. The plurality of first sliding grooves 412 are radially distributed around the axis of the rotating shaft 41. The abutment plates 61 are slidably connected to the first sliding grooves 412.

[0052] Two second connecting rods 611 are provided on one side of the abutment plate 61 near the sliding cylinder 62. The two second connecting rods 611 are distributed along the length of the abutment plate 61, and the ends of the second connecting rods 611 are hinged to the outer circumferential wall of the abutment plate 61 and the sliding cylinder 62, respectively. When the sliding cylinder 62 slides toward the drive shaft 47, the sliding cylinder 62 can force the plurality of abutment plates 61 to slide away from each other and abut against the wall of the mounting hole 471 through the second connecting rods 611.

[0053] A rotation groove 413 is coaxially defined within the rotating shaft 41. The connecting assembly further includes a drive block 63, which is rotatably connected to the rotation groove 413. A first guide block 631 is defined on the side of the drive block 63 proximate to the sliding cylinder 62. A plurality of first guide blocks 631 are provided and are distributed in a circular array around the axis of the drive block 63. In this embodiment, there are two first guide blocks 631. A first avoidance groove 414 is defined on the sidewall of the rotation groove 413, which is connected to the end face of the rotating shaft 41 proximate to the sliding cylinder 62. Two first avoidance grooves 414 are provided, and the two first guide blocks 631 are respectively located within the two first sliding grooves 412. A second guide block 621 is defined on the side of the sliding cylinder 62 proximate to the driving block 63. In this embodiment, two first guide blocks 631 are provided, one corresponding to each of the two first guide blocks 631. The two second guide blocks 621 are respectively disposed within the first avoidance groove 414. One side of the first guide block 631 has a first guide surface 632, and the first guide surface 632 abuts against the second guide surface 622. The first guide surface 632 abuts against the second guide surface 622. When the driving block 63 rotates, the cooperation between the first guide surface 632 and the second guide surface 622 forces the sliding cylinder 62 to slide in the direction close to the driving shaft 47.

[0054] Reference Figure 4 and Figure 7 To drive the drive block 63 to rotate, a hydraulic box 64 is fixedly connected to the mounting cover 12 above the circuit breaker main shaft 3. The hydraulic box 64 defines a first cavity 641 within the hydraulic box 64. The first cavity 641 is fan-shaped and open on the side closest to the circuit breaker main shaft 3. A first pressure plate 642 is fixedly connected to the upper wall of the circuit breaker main shaft 3, extending upward into the first cavity 641. When the circuit breaker main shaft 3 rotates to connect the connecting piece 46 to the vacuum interrupter, the first pressure plate 642 is located on the side of the first cavity 641 closest to the insulating pull rod 32. As the first pressure plate 642 swings, it divides the first cavity 641 into two sealed chambers.

[0055] Reference Figure 4 、 Figure 7 and Figure 8A second cavity 415 is provided on the rotating shaft 41 on the side of the driving block 63 away from the sliding cylinder 62. The second cavity 415 is fan-shaped. The driving block 63 is coaxially fixedly connected to a driving rod 633. A second pressure plate 634 is fixedly connected to the lower peripheral wall of the driving rod 633 away from the end of the driving block 63. The second pressure plate 634 is located in the second cavity 415. During the swinging process, the second pressure plate 634 can divide the second cavity 415 into two sealed chambers. A fifth connecting tube 643 is connected between the first cavity 641 and the second cavity 415. The fifth connecting tube 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 close to the fifth connecting tube 643, the fifth connecting tube 643, and the side of the second cavity 415 close to the fifth connecting tube 643 are all filled with liquid. When the circuit breaker main shaft 3 rotates in a direction away from the insulating pull rod 32, the liquid in the first cavity 641 can be pressed into the second cavity 415 through the first pressure plate 642 to force the second pressure plate 634 to rotate, thereby forcing the drive block 63 to rotate.

[0056] In order to allow the abutment plate 61 to be reset to release the abutment state with the 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.

[0057] Reference Figure 5 and Figure 9 To reduce the risk of the abutment plate 61 slipping when the drive plate rotates the rotating shaft 41, an airbag sheet 612 is fixedly connected to the outer side of the abutment plate 61. The wall of the mounting hole 471 is provided with a plurality of arcuate grooves 472. The length of the arcuate grooves 472 is parallel to the axis of the mounting hole 471, and the arcuate grooves 472 are arranged in a circular array around the axis of the mounting hole 471. When the abutment plate 61 moves toward the wall of the mounting hole 471, the airbag sheet 612 deforms, causing it to partially become lodged within the arcuate grooves 472, thereby limiting the position of the abutment plate 61 and the drive shaft 47 and reducing the possibility of slipping.

[0058] Two arc-shaped limit bars 613 are fixedly connected to the outer side of the abutment plate 61. These limit bars 613 are located on either side of the airbag along its width. Their thickness is less than that of the airbag sheet 612. The arc length of the limit bars 613 on the side facing away from the abutment plate 61 is greater than the arc length of the arc-shaped groove 472 at its opening, preventing the limit bars 613 from becoming lodged within the arc-shaped groove 472. The limit bars 613 constrain both sides of the airbag sheet 612, preventing it from expanding laterally during deformation. This helps increase the depth of the airbag sheet 612 within the arc-shaped groove 472 during deformation, thereby improving the stability of the rotation of the rotating shaft 41 driven by the drive shaft 47.

[0059] The implementation principle of Example 2 is: when operating the disconnector 4, it is necessary to ensure that the voltage difference on both sides thereof is extremely small and no current flows, otherwise the arc generated during operation will seriously damage the switch equipment. Therefore, a first connecting component 6 is provided. Only when the circuit breaker main shaft 3 rotates to disconnect the connecting piece 46 and the vacuum arc chamber 2, the first connecting component 6 will connect the drive shaft 47 and the rotating shaft 41. At this time, the drive shaft 47 can drive the rotating shaft 41 to rotate, thereby reducing the possibility of equipment damage caused by misoperation. Example 3

[0060] The difference between Example 3 and Example 2 is that, referring to Figure 10 One side of the cabinet body 1 is open, and 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 cabinet door 15 can be used to seal and close the opening.

[0061] Reference Figure 1 、 Figure 10 and Figure 11 The cabinet body 1 is provided with a limit assembly 7, which is used to limit and fix the free end of the cabinet door 15. The cabinet body 1 is provided with an air bag assembly 8. When the cabinet body 1 is filled with high pressure, the air bag assembly 8 can drive the limit assembly 7 to limit the free end of the cabinet door 15. The rotating shaft 41 is provided with a second connecting assembly 9. When the moving contact 42 is connected to the static contact 43, the second connecting assembly 9 drives the limit assembly 7 to limit the free end of the cabinet door 15.

[0062] Reference Figure 10 and Figure 11The limiting assembly 7 includes a limiting plate 71 and a limiting rod 72. The limiting plate 71 is semicircular in shape and is located at the free end of the cabinet door 15. The limiting plate 71 is fixedly connected to the side of the cabinet door 15 near the cabinet body 1. A limiting hole 711 is formed through the upper side of the limiting plate 71. The limiting rod 72 is located below the limiting plate 71 and 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, thereby fixing the cabinet door 15 and further limiting the cabinet door 15.

[0063] Reference Figure 11 and Figure 12 The airbag assembly 8 includes an airbag portion 81, a first drive box 82, a piston 83, a first connecting tube 84, and a second connecting tube 85. The airbag portion 81 and the first drive box 82 are both fixedly mounted on the inner wall of the cabinet 1. The first drive box 82 is located below the limit rod 72 and contains a second sliding cavity 821. The piston 83 slides vertically in the second sliding cavity 821. The lower end of the limit rod 72 is fixedly connected to the upper surface of the piston 83. One end of the first connecting tube 84 is connected to the airbag portion 81, and the other end is connected to the lower portion of the second sliding cavity 821. A first one-way assembly 86 is provided at the connection between the first connecting tube 84 and the second sliding cavity 821, ensuring that gas can only flow from the airbag portion 81 to the second sliding cavity 821. One end of the second connecting tube 85 is connected to the airbag part 81, and the other end of the second connecting tube 85 is connected to the lower part of the second sliding cavity 821, and a second one-way component 87 is provided at the connection point between the second connecting tube 85 and the second sliding cavity 821 so that the gas can only pass from the second sliding cavity 821 to the airbag part 81.

[0064] The first one-way assembly 86 includes a third spring 862 and a first steel ball 861. A first mounting slot 863 is defined on the peripheral wall of the first drive box 82. A first through-hole is defined on one side of the first mounting slot 863 for communicating with the first connecting tube 84, and a second through-hole is defined on the other side of the first mounting slot 863 for communicating with the second sliding cavity 821. The third spring 862 is fixedly mounted to the sidewall of the first mounting slot 863 via 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.

[0065] The second one-way assembly 87 includes a fourth spring 872 and a second steel ball 871. A second mounting slot 873 is defined on the peripheral wall of the first drive box 82. A third through-hole is defined on one side of the second mounting slot 873 for communicating with the second connecting pipe 85. A fourth through-hole is defined on the other side of the second mounting slot 873 for communicating with the second sliding cavity 821. The fourth spring 872 is fixedly connected to the sidewall of the second mounting slot 873 via a connecting plate. 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.

[0066] Reference Figure 11-13 The second connecting assembly 9 includes a second drive box 91, a third connecting pipe 92, and a fourth connecting pipe 93. The second drive box 91 is located below the rotating shaft 41 and is fixedly connected to the mounting frame 11. The second drive box 91 defines a third cavity 911, which is fan-shaped. A third pressure plate 912 is fixedly connected to the lower circumferential wall of the rotating shaft 41 and extends into the third cavity 911. The third pressure plate 912 can separate the third cavity 911 into two sealed chambers as it rotates and swings with the rotating shaft 41. One end of the third connecting pipe 92 is connected to the third cavity 911, and the other end is connected to the lower portion of the second sliding cavity 821. A third one-way assembly 94 is provided at the connection between the third connecting pipe 92 and the second sliding cavity 821, ensuring that gas can only flow from the third cavity 911 to the second sliding cavity 821. One end of the fourth connecting tube 93 is connected to the third cavity 911, and the other end of the fourth connecting tube 93 is connected to the lower part of the second sliding cavity 821, and a fourth one-way component 95 is provided at the connection point between the fourth connecting tube 93 and the second sliding cavity 821 so that the gas can only pass from the second sliding cavity 821 to the third cavity 911.

[0067] The third one-way assembly 94 includes a fifth spring 942 and a third steel ball 941. A third mounting slot 943 is defined on the peripheral wall of the first drive box 82. A fifth through-hole is defined on one side of the third mounting slot 943 for communicating with the third connecting tube 92. A sixth through-hole is defined on the other side of the third mounting slot 943 for communicating with the second sliding cavity 821. The fifth spring 942 is fixedly connected to the sidewall of the third mounting slot 943 via a connecting plate. 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.

[0068] The fourth one-way assembly 95 includes a sixth spring 952 and a fourth steel ball 951. A fourth mounting slot 953 is defined around the first drive box 82. A seventh through-hole is defined on one side of the fourth mounting slot 953 for communicating with the fourth connecting tube 93. An eighth through-hole is defined on the other side of the fourth mounting slot 953 for communicating with the second sliding cavity 821. The sixth spring 952 is fixedly connected to the sidewall of the fourth mounting slot 953 via a connecting plate. 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.

[0069] The implementation principle of Example 3 is: an airbag assembly 8 and a second connecting assembly 9 are provided. When the cabinet 1 is filled with high voltage and the isolating switch 4 is not disconnected, the limit assembly 7 can limit the cabinet door 15, so that the staff cannot open the cabinet door 15, thereby ensuring the safety of the staff.

[0070] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas ring main unit, characterized by: The invention comprises a vacuum interrupter (2), a circuit breaker main shaft (3), an isolating switch (4) and a cabinet (1), wherein the upper portion of the cabinet (1) is provided with an inlet terminal (13), the lower portion of the cabinet (1) is provided with an outlet terminal (14), the vacuum interrupter (2) is connected to the outlet terminal (14), the upper end of the isolating switch (4) is connected to the inlet terminal (13), the lower end of the isolating switch (4) is provided with a connecting piece (46) for connecting to the vacuum interrupter (2), the cabinet (1) is provided with a mounting cover (12), the mounting cover (12) is provided with a cover body (5), and the cover body (5) is provided with a plurality of connecting pieces for the vacuum interrupter. (2) and a connecting piece (46) are covered, 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 of the mounting cover (12); an insulating pull rod (32) is provided on the circuit breaker main shaft (3), and a pressure rod (323) is provided on the insulating pull rod (32), and the pressure rod (323) is used to connect with the connecting piece (46), and one end of the insulating pull rod (32) is hinged to the circuit breaker main shaft (3); the pressure rod (323) is connected to the insulating pull rod (32) by sliding along the axial direction, and the insulating pull rod (32) is provided with a first spring (322), and the first spring (323) is provided on the insulating pull rod (32). A spring (322) forces the pressure rod (323) to move in a direction close to the connecting piece (46); the isolating switch (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 (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) drives the moving contact (42) to connect with the static contact (43) by rotating; a first driving assembly (44) is provided on the cabinet (1); a driving shaft ( 47), the first driving assembly (44) is used to drive the driving shaft (47) to rotate, the driving shaft (47) and the rotating shaft (41) are coaxially arranged, and a first connecting assembly (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. When the circuit breaker main shaft (3) rotates so that the connecting piece (46) and the vacuum interrupter (2) are disconnected, the first connecting assembly (6) connects the driving shaft (47) and the rotating shaft (41).

2. A gas ring main unit according to claim 1, characterized in that: The first connecting component (6) includes a contact plate (61) and a sliding cylinder (62), wherein the contact plates (61) are provided in a plurality and are distributed in a circumferential array around the axial direction of the rotating shaft (41), the length direction of the contact plate (61) is parallel to the axial direction of the rotating shaft (41), one end of the contact plate (61) is connected to the rotating shaft (41) by sliding along the radial direction of the rotating shaft (41), and the sliding cylinder (62) is connected to the rotating shaft (41) by sliding along the axial direction, and two second connecting rods (611) are provided on the contact plate (61), and the two second connecting rods (611) are respectively and parallelly provided along the length direction of the contact plate (61), and the two ends of the second connecting rod (611) are respectively hinged to the contact plate (61) and the sliding cylinder (62), and the end face of the driving shaft (47) is provided with a mounting hole (471), and the plurality of contact plates (61) are located in the mounting hole (471).

3. A gas ring main unit according to claim 2, characterized in that: The first connecting assembly (6) further includes a driving block (63), the driving block (63) being rotatably connected to the rotating shaft (41), the driving block (63) and the sliding cylinder (62) being coaxially arranged, the driving block (63) being provided with a first guide block (631), the first guide blocks (631) being provided with a plurality of first guide blocks (631) and being distributed in a circumferential array around the axis of the driving block (63), one side of the first guide block (631) having a first guide surface (632), the side of the sliding cylinder (62) close to the driving block (63) The invention has a second guide block (621), wherein a plurality of the second guide blocks (621) are provided and are distributed in a circular array around the axis direction of the sliding cylinder (62), a second guide surface (622) is provided on one side of the second guide block (621), and the first guide surface (632) abuts against the second guide surface (622). When the driving block (63) rotates, the first guide surface (632) and the second guide surface (622) cooperate to force the sliding cylinder (62) to slide in a direction close to the driving shaft (47).

4. A gas ring main unit according to claim 3, characterized in that: The cabinet (1) is provided with a hydraulic box (64) located above the circuit breaker main shaft (3), and a first cavity (641) is provided in the hydraulic box (64). The rotating shaft (41) is provided with a second cavity (415) located on the side of the driving block (63) away from the sliding cylinder (62), and the second cavity (415) is fan-shaped. The driving block (63) is coaxially provided with a driving rod (633), and a second pressure plate (634) is provided on the driving rod (633). The second pressure plate (634) is located in the second cavity (415). The circuit breaker main shaft (3) is provided with a A first pressure plate (642) is provided in the first cavity (641); a fifth connecting pipe (643) is connected between the first cavity (641) and the second cavity (415); a side of the first cavity (641) close to the fifth connecting pipe (643), the fifth connecting pipe (643), and a side of the second cavity (415) close to the fifth connecting pipe (643) are all filled with liquid; when the circuit breaker main shaft (3) rotates, the liquid in the first cavity (641) is pressed into the second cavity (415) through the first pressure plate (642), thereby forcing the second pressure plate (634) to rotate.

5. The gas ring main unit according to claim 2, characterized in that: An airbag sheet (612) is provided on the outer side surface of the abutment plate (61), a plurality of arc-shaped grooves (472) are provided around the hole wall of the mounting hole (471), and two limiting strips (613) are provided on the outer side surface of the abutment plate (61), the limiting strips (613) are arc-shaped, and the two limiting strips (613) are respectively located on both sides of the airbag distributed along the width direction, the thickness of the limiting strips (613) is less than the thickness of the airbag sheet (612), and the arc length of the limiting strip (613) away from the abutment plate (61) is greater than the arc length of the arc-shaped groove (472) at the opening.

6. The gas ring main unit according to claim 1, characterized in that: A cabinet door (15) is provided on one side of the cabinet body (1), and one side of the cabinet door (15) is hinged to the cabinet body (1). The cabinet body (1) is provided with a limit assembly (7) for limiting and fixing the free end of the cabinet door (15). An air bag assembly (8) is provided in the cabinet body (1). When the cabinet body (1) is filled with high pressure, the air bag assembly (8) drives the limit assembly (7) to limit the free end of the cabinet door (15). The rotating shaft (41) is provided with a second connecting assembly (9). When the moving contact (42) is connected to the static contact (43), the second connecting assembly (9) drives the limit assembly (7) to limit the free end of the cabinet door (15).

7. A gas ring main unit according to claim 6, characterized in that: The limiting assembly (7) includes a limiting plate (71) arranged on the cabinet door (15) and a limiting rod (72) arranged on the inner wall of the cabinet body (1). The limiting plate (71) is provided with a limiting hole (711) for the limiting rod (72) to be inserted. The airbag assembly (8) includes an airbag portion (81) arranged on the inner wall of the cabinet body (1), a first drive box (82), a piston (83) and a first connecting pipe (84). Under normal conditions, the airbag portion (81) is inflated and expanded. A second sliding chamber (821) is provided in the first drive box (82). The piston (83) is slidably connected to the second sliding chamber (821). The two ends of the first connecting pipe (84) are respectively connected to the airbag portion (81) and the lower part of the second sliding chamber (821).

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