An environmentally friendly gas-insulated ring main unit with a side expansion structure

Abstract

The present invention discloses an environmentally friendly gas-insulated ring network cabinet with a side expansion structure, which mainly relates to the technical field of ring network cabinets. It includes a busbar socket arranged on a mounting plate, a plurality of first limit blocks are provided at the end of the busbar connector, a first protrusion is provided at the end of the first limit block, a first inclined surface and a first plane are provided on both sides of the first protrusion, a plurality of second limit blocks are provided on one side of the fixing plate, a second protrusion is provided at the end of the second limit block, a second inclined surface and a second plane are provided on both sides of the second protrusion in contact with the busbar socket, a plurality of third and fourth protrusions are provided on one side of the mounting plate and the busbar socket, a fifth inclined surface and a sixth inclined surface are provided on both sides of the third and fourth protrusions in contact with the third and fourth inclined surfaces, respectively. The beneficial effects of the present invention are: solving the problem of inconvenient installation of the busbar connection mechanism, and improving the efficiency of the side expansion and the sealing insulation performance of the environmentally friendly gas-insulated ring network cabinet.

Description

Technical Field

[0001] The invention relates to the technical field of ring network cabinets, in particular to an environmentally friendly gas-insulated ring network cabinet with a side expansion structure. Background Art

[0002] Environmentally friendly gas-insulated ring main units use environmentally friendly gases such as dry air, nitrogen, and C4 mixed gas as insulating media to receive and distribute electrical energy, avoiding the negative impact of traditional SF6 gas on the environment. They are widely used in urban distribution networks, smart microgrids, commercial real estate, municipal engineering and other fields.

[0003] A 10kV sealed, environmentally friendly gas-insulated ring main unit (RMU) typically includes a switch mechanism, operating mechanism, interlocking mechanism, grounding mechanism, busbar connection mechanism, protection mechanism, and control and signaling mechanisms. As the switch mechanism is the core component of the RMU, responsible for controlling the on / off of the circuit and requiring operation in an insulated and stable environment, it is typically housed in a sealed enclosure (i.e., a gas box). This enclosure provides a degree of protection against external factors such as dust and moisture that could affect its performance and cause electrical faults such as short circuits and discharges. Busbar connections on either side of the gas box transmit electrical energy to adjacent RMUs, enabling lateral expansion of the RMU. The operating mechanism, interlocking mechanism, grounding mechanism, protection mechanism, and control and signaling mechanisms are typically mounted on the cabinet frame outside the gas box or in an associated control box for ease of operation, maintenance, and monitoring.

[0004] At present, when an environmentally friendly gas-insulated ring main unit needs to be expanded sideways, alcohol is first used to clean the busbar sockets on both sides of the gas tank, and lubricant is applied to both ends of the busbar connector and the busbar socket. Then, one end of the busbar connector is inserted into the busbar socket of one of the ring main units, and then another ring main unit is moved closer to one of the ring main units so that the other end of the busbar connector enters the busbar socket provided in the other ring main unit, thereby realizing the connection between the two ring main units. However, since the existing busbar connector generally includes three phases abc, multiple busbar connectors often deviate when docking with the busbar socket provided in another ring main unit. It is necessary to constantly adjust the position of the ring main unit and the busbar connector, which increases the efficiency of the side expansion of the environmentally friendly gas-insulated ring main unit to a certain extent. At the same time, in the process of using the above steps, the busbar connector is extremely susceptible to squeezing during installation. Although it has a certain elasticity, it is easy to be worn if it is misaligned many times, affecting the sealing and insulation performance of the side expansion of the environmentally friendly gas-insulated ring main unit. Summary of the Invention

[0005] The purpose of the present invention is to provide an environmentally friendly gas-insulated ring main unit with a side expansion structure, solve the problem of inconvenient installation of the busbar connection mechanism, and improve the efficiency of the side expansion and the sealing insulation performance of the environmentally friendly gas-insulated ring main unit.

[0006] In order to achieve the above-mentioned purpose, the invention is implemented through the following technical solutions:

[0007] An environmentally friendly gas-insulated ring main unit (RMU) with a side-expanding structure, comprising several RMUs, each of which is provided with a gas box on top, a busbar connection mechanism between two adjacent gas boxes, mounting plates on both sides of the gas boxes, the busbar connection mechanism comprising a busbar socket disposed on the mounting plate, a busbar connector disposed between two adjacent busbar sockets, the busbar socket having a groove for plugging with the busbar connector, and the mounting plate having a first through hole for the busbar connector to pass through.

[0008] The busbar connector is provided with several first limit blocks at the end, and a first protrusion is provided at the end of the first limit block, and a first inclined surface and a first plane are respectively provided on both sides of the first protrusion for contacting the mounting plate. A fixing plate is provided on the mounting plate, and several second limit blocks are provided on one side of the fixing plate. A second protrusion is provided at the end of the second limit block, and second inclined surfaces and second planes are provided on both sides of the second protrusion for contacting the busbar socket. Several third protrusions and a fourth protrusion are provided on one side of the mounting plate and the busbar socket, and a third inclined surface and a fourth inclined surface are respectively provided on both sides of the first protrusion and the second protrusion, and a fifth inclined surface and a sixth inclined surface are respectively provided on both sides of the third protrusion and the fourth protrusion for contacting the third inclined surface and the fourth inclined surface.

[0009] Furthermore, a sealing groove is provided on one side of the first limiting block, a first sealing strip in contact with the mounting plate is provided in the sealing groove, and the first sealing strip is provided between the first plane and the mounting plate.

[0010] Furthermore, a second sealing strip and a third sealing strip are respectively provided on both sides of the fixing plate and are in contact with the busbar socket and the mounting plate.

[0011] Furthermore, a second through hole is provided on the mounting plate, and a number of blocking blocks for blocking the second through hole are respectively provided on the mounting plates located on both sides of the edge, and a ventilation pipe connected to the second through hole is respectively provided on the mounting plates on the other side. An air inlet is provided at the bottom of one of the air boxes, and a detection port is provided on one side of the air box, one of the detection ports is provided with a pressure gauge, and the other detection ports are provided with plugs.

[0012] Furthermore, a plurality of first fixing rings and a second fixing ring are respectively provided on the mounting plates of one of the two adjacent air boxes, one end of the ventilation pipe and the block are each provided with a protrusion slidably connected to the first fixing ring, a plurality of third limit blocks are slidably connected to the first fixing ring, the two sides of the protrusion are respectively in contact with the third limit block and the mounting plate, the other end of the ventilation pipe and the block are slidably connected to the corresponding second through hole, the other end of the ventilation pipe extends to the second through hole on the adjacent air box, and the ventilation pipe is provided with a ventilation hole connecting the two adjacent air boxes.

[0013] Furthermore, a turntable is rotatably connected to the first fixing ring, a plurality of inclined slots are provided on the turntable, and a guide column is provided at the end of the third limiting block for sliding contact with the inclined slots.

[0014] Furthermore, a seventh inclined surface and a third plane in contact with the protrusion are respectively provided on both sides of the third limit block, and a first stop block and a second stop block are respectively provided on the turntable and the first fixed ring, the first stop block is provided with an arc rod, the second stop block is provided with a guide hole slidably connected to the arc rod, and a first spring is provided between the first stop block and the second stop block and is sleeved on the outside of the arc rod.

[0015] Furthermore, a wedge block and a conical sealing ring are respectively provided on the first fixing ring, a second spring is provided between the protrusion and the wedge block, and a conical surface in contact with the conical sealing ring is provided on one side of the wedge block.

[0016] Furthermore, the second fixing ring is respectively provided with a first limiting ring and a second limiting ring, a slide is provided between the first limiting ring and the second limiting ring, the end of the ventilation pipe is in contact with the slide and drives the slide to slide on the fixing ring, the end of the ventilation pipe is provided with a plurality of first air holes connected with the ventilation holes, the second fixing ring is provided with second air holes connected with the first air holes and the air box, and the second air holes are arranged between the first limiting ring and the second limiting ring.

[0017] Furthermore, a guide rod is provided on one side of the slide and is slidably connected to the second fixed ring. A third spring is sleeved on the outer side of the guide rod. The third spring is arranged between the slide and the second fixed ring. A third sealing ring and a fourth sealing ring are respectively provided on both sides of the first limiting ring and are in contact with the slide and the ventilation pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. When it is necessary to expand the environmentally friendly gas insulated ring network cabinet sideways, first bring the corresponding ring network cabinets together and fix them together with bolts, then use alcohol to clean the busbar socket on the outside of the ring network cabinet, and apply lubricant on both ends of the busbar connector and the busbar socket, then insert one end of the busbar connector into the groove provided in one of the busbar sockets, and use the friction generated by the contact between the groove and the busbar connector to limit the busbar connector from sliding out of the groove, and then put the busbar connector with one of the busbar sockets into the gas box of one of the ring network cabinets, and pass the other end of the busbar connector through the first through hole provided in the two mounting plates in turn, and then the first limit block contacts the mounting plate, and the cooperation between the first protrusion, the first bevel, the mounting plate, and the first plane is used to achieve the initial fixation of the mounting seat, and at the same time, through the fixing plate, the second limit block, the busbar socket, the second bevel, The cooperation between the second plane further strengthens the fixation of the busbar socket on the mounting plate, thereby strengthening the stability of the overall structure and improving the connection effect of the side expansion of the environmentally friendly gas insulated ring network cabinet; then, another busbar socket is placed in the gas box of another ring network cabinet, the busbar socket is aligned with the other end of the busbar connector, and the other end of the busbar connector is inserted into the groove provided in the other busbar socket. Similarly, the connection between the busbar connector and the other busbar socket is achieved through the friction force generated after the groove contacts the other end of the busbar connector. At the same time, through the cooperation between the first protrusion, the first inclined plane, the mounting plate, the first limit block, the first plane, the second limit block, the second protrusion, the second inclined plane, the busbar socket, and the second plane, the other busbar socket is installed on the other mounting plate, thereby realizing the side expansion of the environmentally friendly gas insulated ring network cabinet and transmitting electrical energy to the adjacent ring network cabinet;

[0020] 2. During the side expansion process, the other ring main unit does not need to move closer to one of the ring main units to allow the other end of the busbar connector to enter the busbar socket of the other ring main unit, avoiding the situation where the busbar connector deviates and the position of the ring main unit and the busbar connector needs to be constantly adjusted, thereby improving the efficiency of the side expansion of the environmentally friendly gas insulated ring main unit. At the same time, it prevents the busbar connector from being worn during the side expansion process, affecting the sealing and insulation effect, thereby improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring main unit;

[0021] 3. When the busbar connection mechanism needs to be replaced or maintained, it is only necessary to rotate the busbar socket on the mounting plate, and release the restriction on the sliding of the busbar socket on the mounting plate through the cooperation among the mounting plate, the third protrusion, the fifth inclined surface, the first protrusion, the third inclined surface, the first limit block, the fourth protrusion, the sixth inclined surface, the second protrusion, and the fourth inclined surface. Then, the busbar socket is pulled out from the mounting seat. Similarly, another busbar socket is pulled out from the mounting plate of another ring network cabinet, and the busbar connector is pulled out, so that the busbar connection mechanism is disassembled from the mounting plate as a whole, without releasing the connection between the two ring network cabinets, which facilitates the subsequent inspection and maintenance of the busbar connection mechanism. At the same time, it is avoided that the busbar socket is pulled hard, which causes excessive deformation of the first limit block or the second limit block, thereby reducing the cost required for maintaining the busbar connection mechanism.

[0022] 4. During the installation of the busbar connection mechanism, when the first limit block contacts the mounting plate, the first sealing strip passes through the first through-hole smoothly through the cooperation between the first inclined surface, the mounting plate and the first limit block. When the first limit block resets and rebounds, it drives the first sealing strip to move together until the first sealing strip moves between the first plane and the mounting plate. Then the first limit block is further reset and squeezes the first sealing strip, thereby achieving the first layer of sealing of the gap between the busbar socket and the mounting plate, improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet, preventing external moist air from entering the gas box, and preventing gas leakage inside the gas box, maintaining stable gas pressure and insulation performance in the gas box, avoiding the decrease in insulation strength due to gas leakage, and thus preventing electrical faults such as short circuit and discharge;

[0023] In addition, a second sealing strip and a third sealing strip in contact with the busbar socket and the mounting plate are respectively provided on both sides of the fixing plate to strengthen the second layer of sealing between the busbar socket and the mounting plate, further improve the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet, maintain stable gas pressure and insulation performance in the gas box, avoid the decrease in insulation strength due to gas leakage, and thus prevent electrical faults such as short circuit and discharge.

[0024] 5. Block the second through holes on the mounting plates on both sides of the overall edge of the ring network cabinet by blocking them, so as to avoid leakage of gas inside the gas box, which may lead to a decrease in insulation strength, thereby preventing electrical faults such as short circuits and discharges; at the same time, connect the remaining adjacent second through holes through ventilation pipes, so as to connect the gas boxes of several ring network cabinets in series, and monitor and balance the pressure inside multiple gas boxes through a control system, thereby reducing the air required for control system installation and the manufacturing cost; in addition, an air inlet is provided at the bottom of one of the gas boxes, which is connected to the air inlet pipe of the control system through the air inlet, so as to transport environmentally friendly insulating gas to the gas box, provide certain protection for the switch mechanism inside the gas box, and prevent electrical faults such as short circuits and discharges. At the same time, there is no need to set air inlets and connecting pipes on the remaining gas boxes. , further reducing the space required for gas box installation and the manufacturing cost; a detection port is provided on one side of the gas box, one of which is provided with a pressure gauge, and the other detection ports are provided with plugs. Normally, the internal air pressure of multiple series-connected gas boxes is monitored by the pressure gauge provided at a single detection port, and data is fed back to the control system without the need to use multiple pressure gauges for detection, thereby reducing the space required for gas box installation and the manufacturing cost; when the feedback data is abnormal, the second through holes on the mounting plates on both sides are blocked by blocking blocks, and the gas box is switched to a single sealed box body, and then the plug of the detection port is removed, and a temporary pressure gauge is used to detect the internal air pressure of the gas box, so as to judge the sealing condition of the single gas box, avoid gas leakage inside the gas box resulting in a decrease in insulation strength, and thus prevent electrical faults such as short circuit and discharge;

[0025] 6. Pre-arrange several first fixing rings on the mounting plate of one of the air boxes and several second fixing rings on the mounting plate of the other air box, insert one end of the ventilation pipe into the first fixing ring, and make the ventilation pipe slide smoothly in the first fixing ring through the cooperation among the ventilation pipe, the protrusion, the third limiting block, the seventh inclined surface, the first fixing ring, the guide column, the inclined groove, the turntable, and the first spring. Then, the end of the ventilation pipe slides into the second fixing ring, and through the cooperation among the ventilation pipe, the slide plate, the second fixing ring, and the second limiting ring, the slide plate contacts the second limiting ring. At this time, the first fixing ring provided at the end of the ventilation pipe An air vent is moved between the first limiting ring and the second limiting ring, thereby connecting the second air vent and the ventilation hole at the same time, so that the gas in one of the air boxes can enter the adjacent air box through the ventilation pipe, ensuring that the interior of each air box is filled with environmentally friendly insulating gas, improving the insulation strength of the air box, and preventing electrical faults such as short circuits and discharges; at the same time, the end of the ventilation pipe contacts the fourth sealing ring provided on the first limiting ring, realizing the sealing at the second fixing ring after the ventilation pipe is inserted into the adjacent air box, avoiding gas leakage inside the air box causing a decrease in insulation strength, and further preventing electrical faults such as short circuits and discharges;

[0026] In addition, during the movement of the ventilation pipe, the cooperation among the ventilation pipe, the protrusion, the second spring, the wedge block and the conical sealing ring further squeezes the conical sealing ring, causing it to deform and block the gap between the ventilation pipe and the mounting plate, thereby preventing gas leakage inside the air box from causing a decrease in insulation strength and preventing electrical faults such as short circuits and discharges.

[0027] In addition, when the end of the ventilation pipe is fully inserted into the second limiting ring, the protrusion provided at the end of the ventilation pipe just slides over the third limiting block. Through the cooperation among the first spring, the turntable, the inclined groove, the guide column, the third limiting block, the third plane, and the protrusion, the ventilation pipe is fixed to the first fixing ring, thereby preventing it from accidentally sliding under the action of external force, causing gas leakage inside the air box and reducing the insulation strength, thereby preventing electrical faults such as short circuit and discharge.

[0028] Similarly, blocking blocks are installed on the mounting plates on both sides of the overall edge of the ring network cabinet so that the blocking blocks block the corresponding first through holes to prevent gas leakage inside the gas box from causing a decrease in insulation strength, thereby ensuring the sealing and insulation performance of the side expansion of the ring network cabinet and preventing electrical faults such as short circuit and discharge.

[0029] 7. When the ventilation pipe needs to be removed, the third limit block is driven to move outward by rotating the turntable through the cooperation between the inclined groove and the guide column until the third plane provided on the third limit block no longer contacts the ventilation pipe, and then the ventilation pipe is pulled outward so that its bottom slides out from the second limit ring and the first limit ring in turn, thereby eliminating the need to separate adjacent ring network cabinets to achieve disassembly of the ventilation pipe, simplifying the efficiency of maintenance and replacement of the ventilation pipe; in addition, when the ventilation pipe is taken out, the rebound force generated by the compression of the third spring drives the slide plate to reset and move toward the first limit ring until it contacts the third sealing ring provided on the first limit ring, thereby achieving sealing at the second fixing ring after the ventilation pipe is pulled out from the adjacent air box, avoiding gas leakage inside the air box resulting in a decrease in insulation strength, and preventing electrical faults such as short circuit and discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attachment Figure 1 It is a structural diagram of the ring network cabinet of the present invention.

[0031] Attachment Figure 2 It is a schematic structural diagram of the interior of the air box of the present invention.

[0032] Attachment Figure 3 It is a structural schematic diagram of the busbar socket of the present invention.

[0033] Attachment Figure 4 This invention is attached Figure 3 A partial enlarged view of area A in the middle.

[0034] Attachment Figure 5 It is a schematic structural diagram of the third protrusion of the present invention.

[0035] Attachment Figure 6 It is a schematic structural diagram of the fourth protrusion of the present invention.

[0036] Attachment Figure 7 It is a structural schematic diagram of the ventilation pipe of the present invention.

[0037] Attachment Figure 8 It is a structural schematic diagram of the block of the present invention.

[0038] Attachment Figure 9 It is a structural schematic diagram of the turntable of the present invention.

[0039] Attachment Figure 10 It is a structural schematic diagram of the inspection opening of the present invention.

[0040] Reference numerals shown in the accompanying drawings:

[0041] 1. Ring main unit; 2. Gas box; 3. Mounting plate; 4. Busbar socket; 5. Busbar connector; 6. Groove; 7. First through hole; 8. First stopper; 9. First protrusion; 10. First inclined surface; 11. First plane; 12. Fixing plate; 13. Second stopper; 14. Second protrusion; 15. Second inclined surface; 16. Second plane; 17. Third protrusion; 18. Fourth protrusion; 19. Third inclined surface; 20. Fourth inclined surface; 21. Fifth inclined surface; 22. Sixth inclined surface; 23. Sealing groove;

[0042] 24. First sealing strip; 25. Second sealing strip; 26. Third sealing strip; 27. Second through hole;

[0043] 28. Block; 29. ​​Ventilation pipe; 30. Air inlet; 31. Inspection port; 32. Pressure gauge; 33. Plug;

[0044] 34. First fixing ring; 35. Second fixing ring; 36. Protrusion; 37. Third limiting block; 38. Ventilation hole; 39. Turntable; 40. Inclined groove; 41. Guide column; 42. Seventh inclined surface; 43. Third plane; 44. First stop block; 45. Second stop block; 46. Arc rod; 47. Guide hole; 48. First spring; 49. Wedge block; 50. Conical sealing ring; 51. Second spring; 52. Conical surface; 53. First limiting ring; 54. Second limiting ring; 55. Slide plate; 56. First air vent; 57. Second air vent; 58. Guide rod; 59. Third spring; 60. Third sealing ring; 61. Fourth sealing ring; 62. Inspection port; 63. Inspection plate; 64. Fifth sealing ring; 65. Reinforcing rib. DETAILED DESCRIPTION

[0045] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0046] The present invention provides an environmentally friendly gas insulated ring network cabinet with a side expansion structure, such as Figures 1-6 As shown, the top of the ring network cabinet 1 is provided with an air box 2, and the interior of the air box 2 is filled with environmentally friendly insulating gas to improve the insulation strength of the air box 2 and prevent electrical faults such as short circuit and discharge. Figure 10 As shown, a maintenance port 62 is provided on one side of the specific gas box 2, which is convenient for maintaining and replacing the switch mechanism and busbar connection mechanism inside the gas box, without replacing the entire gas box 2, thereby reducing the maintenance cost of the environmentally friendly gas insulated ring network cabinet. In addition, an inspection plate 63 for blocking the inspection port 62 is provided on the gas box 2, and a fifth sealing ring 64 is provided between the gas box 2 and the inspection plate 63 to ensure the sealing of the overall structure of the gas box, avoid the gas leakage inside the gas box 2 causing the insulation strength to decrease, and prevent electrical faults such as short circuit and discharge from occurring. At the same time, a reinforcing rib 65 is provided on the inspection plate 63 to strengthen the explosion-proof strength of the inspection plate 63, to avoid the inspection door being damaged by pressure when the short circuit arc is released, thereby improving the service life of the environmentally friendly gas insulated ring network cabinet.

[0047] A busbar connection mechanism is provided between two adjacent gas boxes 2, which is practical for transmitting electric energy of adjacent environmentally friendly gas insulated ring network cabinets 1. The side expansion of the environmentally friendly gas insulated ring network cabinet 1 is now provided; mounting plates 3 are respectively provided on both sides of the gas box 2, and the specific mounting plates 3 are recessed toward the inner side of the ring network cabinet 1 to reserve space for the installation of the busbar connection mechanism; the busbar connection mechanism includes a busbar socket 4 provided on the mounting plate 3, and a busbar connector 5 is provided between two adjacent busbar sockets 4. Specifically, the busbar socket 4 and the busbar connector 5 are made of sealed insulating material to avoid gas leakage inside the gas box 2 resulting in a decrease in insulation strength and to prevent electrical faults such as short circuit and discharge; the busbar socket 4 is provided with a groove 6 for plugging with the busbar connector 5, and the friction force generated by the contact between the groove 6 and the busbar connector 5 limits the busbar connector 5 from sliding out of the groove 6, and a first through hole 7 for the busbar connector 5 to pass through is provided on the mounting plate 3 for installing the busbar connection mechanism;

[0048] The end of the busbar connector 5 is provided with a plurality of first limit blocks 8, the end of the first limit block 8 is provided with a first protrusion 9, and the two sides of the first protrusion 9 are respectively provided with a first inclined surface 10 and a first plane 11 in contact with the mounting plate 3, a fixing plate 12 is provided on the mounting plate 3, and one side of the fixing plate 12 is provided with a plurality of second limit blocks 13, the end of the second limit block 13 is provided with a second protrusion 14, and the two sides of the second protrusion 14 are provided with a second inclined surface 15 and a second plane 16 in contact with the busbar socket 4. When the environmentally friendly gas insulated ring network cabinet 1 needs to be expanded sideways, the corresponding ring network cabinets 1 are first brought together and fixed together with bolts, and then the busbar socket 4 is cleaned with alcohol on the outside of the ring network cabinet 1, and at the same time Apply lubricant to both ends of the busbar connector 5 and the busbar socket 4, then insert one end of the busbar connector 5 into the groove 6 provided in one of the busbar sockets 4, and use the friction force generated by the contact between the groove 6 and the busbar connector 5 to limit the busbar connector 5 from sliding out of the groove 6, and then put the busbar connector 5 with one of the busbar sockets 4 into the gas box 2 of one of the ring network cabinets 1, and pass the other end of the busbar connector 5 through the first through holes 7 provided on the two mounting plates 3 in turn, and then the first limit block 8 contacts the mounting plate 3, and contacts the mounting plate 3 through the first inclined surface 10 provided on one side of the first protrusion 9. The component force generated drives the first limit block 8 to deform slightly until the first limit block 8 passes through the mounting plate 3, and then the first limit block 8 is reset, and The first plane 11 provided on the other side of the first protrusion 9 contacts the mounting plate 3 to achieve preliminary fixation of the mounting seat. At the same time, the second limit block 13 provided on the fixing plate 12 contacts the busbar socket 4, and contacts the busbar socket 4 through the second inclined surface 15 provided on the second protrusion 14. The component force generated drives the second limit block 13 to deform slightly until the second limit block 13 passes through the busbar socket 4. Then the second limit block 13 is reset and contacts the busbar socket 4 through the second plane 16 provided on the other side of the second protrusion 14. The resistance generated further strengthens the fixation of the busbar socket 4 on the mounting plate 3, thereby strengthening the stability of the overall structure and improving the connection effect of the side expansion of the environmentally friendly gas insulated ring network cabinet 1; then the other busbar socket 4 is placed on the second busbar socket 4. Place it in the gas box 2 of another ring network cabinet 1, make the busbar socket 4 correspond to the other end of the busbar connector 5, and insert the other end of the busbar connector 5 into the groove 6 provided on the other busbar socket 4. Similarly, the friction force generated by the contact between the groove 6 and the other end of the busbar connector 5 realizes the connection between the busbar connector 5 and the other busbar socket 4. At the same time, through the cooperation between the first protrusion 9, the first inclined surface 10, the mounting plate 3, the first limit block 8, the first plane 11, the second limit block 13, the second protrusion 14, the second inclined surface 15, the busbar socket 4, and the second plane 16, the other busbar socket 4 is installed on the other mounting plate 3, thereby realizing the side expansion of the environmentally friendly gas insulated ring network cabinet 1 and transmitting electrical energy to the adjacent ring network cabinet 1;At the same time, during the side expansion process, the other ring main unit 1 does not need to move closer to one of the ring main units 1, so that the other end of the busbar connector 5 enters the busbar socket 4 provided in the other ring main unit 1, thereby avoiding the situation where the busbar connector 5 deviates, resulting in the need to continuously adjust the positions of the ring main unit 1 and the busbar connector 5, thereby improving the efficiency of the side expansion of the environmentally friendly gas insulated ring main unit 1, and at the same time avoiding the busbar connector 5 from being worn during the side expansion process and affecting the sealing and insulation effect, thereby improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring main unit 1;

[0049] A plurality of third protrusions 17 and a fourth protrusion 18 are provided on one side of the mounting plate 3 and the busbar socket 4, and a third inclined surface 19 and a fourth inclined surface 20 are provided on both sides of the first protrusion 9 and the second protrusion 14 respectively, and a fifth inclined surface 21 and a sixth inclined surface 22 are provided on both sides of the third protrusion 17 and the fourth protrusion 18 respectively, which are in contact with the third inclined surface 19 and the fourth inclined surface 20. When the busbar connection mechanism needs to be replaced or maintained, it is only necessary to rotate the busbar socket 4 on the mounting plate 3 so that the fifth inclined surface 21 provided on the third protrusion 17 on the mounting plate 3 contacts the third inclined surface 19 provided on both sides of the first protrusion 9, and the component force generated drives the first limit block 8 to deform slightly. At the same time, the sixth inclined surface 22 provided on the fourth protrusion 18 on the busbar socket 4 contacts the fourth inclined surface 20 provided on both sides of the second protrusion 14. When the first and second protrusions 9 and 14 are in contact with each other, the component force generated drives the second limit block 13 to deform slightly, and the busbar socket 4 is further rotated until the first protrusion 9 and the second protrusion 14 are no longer in contact with the mounting seat and the busbar socket 4 respectively, thereby releasing the restriction on the sliding of the busbar socket 4 on the mounting plate 3, and then pulling out the busbar socket 4 to pull out the busbar socket 4 from the mounting seat. Similarly, unplug another busbar socket 4 on the mounting plate 3 of another ring network cabinet 1, and bring out the busbar connector 5, so that the busbar connection mechanism is disassembled from the mounting plate 3 as a whole, without releasing the connection between the two ring network cabinets 1, which is convenient for subsequent inspection and maintenance of the busbar connection mechanism line, and at the same time avoids forcibly pulling the busbar socket 4, which causes excessive deformation of the first limit block 8 or the second limit block 13, thereby reducing the cost required for maintaining the busbar connection mechanism.

[0050] Preferably, Figure 4 and Figure 5As shown, a sealing groove 23 is provided on one side of the first limit block 8, and a first sealing strip 24 in contact with the mounting plate 3 is provided in the sealing groove 23. The first sealing strip 24 is arranged between the first plane 11 and the mounting plate 3. When the first limit block 8 contacts the mounting plate 3, the first inclined surface 10 cooperates with the mounting plate 3 to drive the first limit block 8 to bend and deform, so that the first sealing strip 24 passes through the first through hole 7 smoothly. When the first limit block 8 resets and rebounds, it will drive the first sealing strip 24 to move together until the first sealing strip 24 moves between the first plane 11 and the mounting plate 3. Then the first limit block 8 is further reset and squeezes the first sealing strip 24, thereby realizing the first layer of sealing of the gap between the busbar socket 4 and the mounting plate 3, improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, preventing external moist air from entering the gas box 2, and preventing gas leakage inside the gas box 2, maintaining a stable gas pressure and insulation performance in the gas box 2, avoiding the decrease in insulation strength due to gas leakage, and thus preventing electrical faults such as short circuit and discharge.

[0051] Preferably, Figure 4 As shown, a second sealing strip 25 and a third sealing strip 26 are respectively provided on both sides of the fixing plate 12, which are in contact with the bus socket 4 and the mounting plate 3, so as to strengthen the second layer of sealing between the bus socket 4 and the mounting plate 3, further improve the sealing insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, maintain a stable gas pressure and insulation performance in the gas box 2, avoid the decrease in insulation strength due to gas leakage, and thus prevent electrical faults such as short circuit and discharge.

[0052] Preferably, Figure 2 、 Figure 7 and Figure 8As shown, a second through hole 27 is provided on the mounting plate 3, and a plurality of blocking blocks 28 for blocking the second through hole 27 are respectively provided on the mounting plates 3 on both sides of the edge, which are used to block the second through holes 27 on the mounting plates 3 on both sides of the overall edge of the ring network cabinet 1, so as to prevent the leakage of gas inside the gas box 2 and the decrease of insulation strength, thereby preventing electrical faults such as short circuit and discharge from occurring; a ventilation pipe 29 connected to the second through hole 27 is respectively provided on the mounting plates 3 on one of the other sides, so that the gas boxes 2 of several ring network cabinets 1 are connected in series, and the pressure inside the multiple gas boxes 2 is monitored and balanced through a control system, thereby reducing the air required for the installation of the control system and the manufacturing cost. Specifically, the ventilation pipe 29 is made of sealed insulating material to ensure the sealing insulation performance of the side expansion of the ring network cabinet 1 and prevent electrical faults such as short circuit and discharge from occurring; an air inlet 30 is provided at the bottom of one of the gas boxes 2, and the specific air inlet 30 is connected to the air inlet pipe of the control system to transport environmentally friendly insulating gas to the gas box 2 and provide air for the switch mechanism inside the gas box 2. It provides certain protection to prevent electrical faults such as short circuit and discharge. At the same time, there is no need to set air inlet 30 and connecting pipes on the other air boxes 2, further reducing the space required for installation of the air box 2 and the manufacturing cost. A detection port 31 is provided on one side of the air box 2, one of the detection ports 31 is provided with a pressure gauge 32, and the other detection ports 31 are provided with plugs 33. Normally, the internal air pressure of multiple series-connected air boxes 2 is monitored by the pressure gauge 32 provided at a single detection port 31. In order to control the system feedback data, there is no need to use multiple pressure gauges 32 for detection, reducing the space required for installation of the air box 2 and the manufacturing cost. When the feedback data is abnormal, the second through holes 27 on the mounting plates 3 on both sides are blocked by the blocking block 28, and the air box 2 is switched to a single sealed box body. Then the plug 33 of the detection port 31 is removed, and a temporary pressure gauge 32 is used to detect the internal air pressure of the air box 2, so as to judge the sealing condition of the single air box 2, avoid the internal gas leakage of the air box 2 resulting in a decrease in insulation strength, and thus prevent electrical faults such as short circuit and discharge.

[0053] Preferably, Figure 7 and Figure 8As shown, a plurality of first fixing rings 34 and a second fixing ring 35 are respectively provided on one of the mounting plates 3 of the two adjacent air boxes 2, and one end of the ventilation pipe 29 and the block 28 are provided with a protrusion 36 that is slidably connected to the first fixing ring 34, and a plurality of third limiting blocks 37 are slidably connected to the first fixing ring 34, and the two sides of the protrusion 36 are respectively in contact with the third limiting blocks 37 and the mounting plate 3, and the other ends of the ventilation pipe 29 and the block 28 are slidably connected to the corresponding second through-hole 27, and the other end of the ventilation pipe 29 extends to the second through-hole 27 on the adjacent air box 2, and the ventilation pipe 29 is provided with a ventilation hole 38 that connects the two adjacent air boxes 2, and the third limiting block 37 is slid on the first fixing ring 34 so that the ventilation pipe 29 and the block 28 can slide into the corresponding first fixing ring 34 respectively until one end of the ventilation pipe 29 and the block 28 slide into the first through-hole 7 respectively, so that The blocking block 28 blocks the corresponding first through hole 7 to prevent the internal gas leakage of the gas box 2 from causing a decrease in insulation strength, thereby ensuring the sealing insulation performance of the side expansion of the ring network cabinet 1 and preventing electrical faults such as short circuit and discharge; and one end of the ventilation pipe 29 passes through the first through hole 7 on the mounting plate 3 of the two gas boxes 2, and connects the two gas boxes 2 through the ventilation hole 38 provided on the ventilation pipe 29 to ensure that the internal air pressure of the two gas boxes 2 remains consistent, thereby preventing electrical faults such as short circuit and discharge; finally, by sliding the third limit block 37 in the opposite direction on the first fixing ring 34, the corresponding third limit block 37 is respectively in contact with the blocking block 28 and the protrusion 36 provided at the end of the ventilation pipe 29, and the resistance generated limits the blocking block 28 and the ventilation pipe 29 from sliding on the first fixing ring 34, thereby ensuring the stability of the overall structure, preventing the internal gas leakage of the gas box 2 from causing a decrease in insulation strength, thereby preventing electrical faults such as short circuit and discharge.

[0054] Preferably, Figure 7 、 Figure 8 and Figure 9 As shown, a turntable 39 is rotatably connected to the first fixing ring 34, and a plurality of inclined grooves 40 are provided on the turntable 39. The end of the third limit block 37 is provided with a guide column 41 that is in sliding contact with the inclined groove 40. By rotating the turntable 39 on the first fixing ring 34, the plurality of inclined grooves 40 provided on the turntable 39 are further in contact with the corresponding guide columns 41. The generated component force drives the plurality of guide columns 41 to move along with the turntable 39. At the same time, since the third limit block 37 is slidingly set on the first fixing ring 34, it plays a guiding role in the sliding of the third limit block 37, thereby driving the plurality of third limit blocks 37 to slide on the first fixing ring 34 at the same time, without the need to slide the third limit blocks 37 separately, thereby simplifying the operation steps of driving the plurality of third limit blocks 37 to slide, and improving the efficiency of the fixed block 28 and the ventilation pipe 29.

[0055] Preferably, Figure 7 、 Figure 8 and Figure 9 As shown, the two sides of the third limit block 37 are respectively provided with a seventh inclined surface 42 and a third flat surface 43 that contact the protrusion 36, and the turntable 39 and the first fixing ring 34 are respectively provided with a first stop 44 and a second stop 45, the first stop 44 is provided with an arc rod 46, and the second stop 45 is provided with a guide hole 47 that is slidably connected to the arc rod 46, which guides the movement of the first spring 48 and prevents it from deviating from the specified track; a first spring 48 is provided between the first stop 44 and the second stop 45 and is sleeved on the outside of the arc rod 46. When the blocking block 28 or the ventilation pipe 29 is inserted into the corresponding first fixing ring 34, the protrusion 36 provided thereon contacts the seventh inclined surface 42 provided on one side of the corresponding third limit block 37, and the component force generated drives it to move on the first fixing ring 34, and the component force generated after the guide column 41 contacts the corresponding inclined groove 40 The force component drives the turntable 39 to rotate together, and through the cooperation of the remaining inclined slots 40 and the guide column 41, it will drive the remaining third limit blocks 37 to move together, and at the same time, it will drive the first stop 44 on the turntable 39 to move together, and compress the first spring 48 between the first stop 44 and the second stop 45 until the protrusion 36 completely passes through the corresponding third limit block 37. Then the rebound force generated by the compression of the first spring 48 drives the turntable 39 to reset, and through the cooperation of the guide column 41 and the inclined slot 40, it drives several third limit blocks 37 to reset until the third plane 43 provided on the other side of the third limit block 37 contacts the other side of the protrusion 36, thereby achieving the fixation of the block 28 and the ventilation pipe 29 on the first fixing ring 34, preventing them from accidentally sliding under the action of external force, causing the internal gas leakage of the air box 2 to cause the insulation strength to decrease, thereby preventing electrical faults such as short circuit and discharge.

[0056] Preferably, Figure 7 and Figure 8 As shown, a wedge block 49 and a conical sealing ring 50 are respectively provided on the first fixing ring 34, and a second spring 51 is provided between the protrusion 36 and the wedge block 49. One side of the wedge block 49 is provided with a conical surface 52 that contacts the conical sealing ring 50. When the blocking block 28 and the ventilation pipe 29 enter the corresponding first fixing ring 34, the corresponding protrusions 36 provided on the blocking block 28 and the ventilation pipe 29 respectively contact the second spring 51, and the component force generated compresses the second spring 51. The component force generated after the compression of the second spring 51 is transmitted to the wedge block 49, driving the wedge block 49 to move further toward the conical sealing ring 50 until the conical surface 52 provided on one side of the wedge block 49 contacts the conical sealing ring 50. The component force generated further squeezes the conical sealing ring 50, causing it to deform and block the gap between the ventilation pipe 29 or the blocking block 28 and the mounting plate 3, thereby preventing gas leakage inside the air box 2 from causing a decrease in insulation strength, and preventing electrical faults such as short circuit and discharge.

[0057] Preferably, Figure 7 As shown, the second fixing ring 35 is respectively provided with a first limiting ring 53 and a second limiting ring 54, and a slide 55 is provided between the first limiting ring 53 and the second limiting ring 54. The end of the ventilation pipe 29 contacts the slide 55 and drives the slide 55 to slide on the fixing ring. The end of the ventilation pipe 29 is provided with a plurality of first air holes 56 connected to the ventilation hole 38. The second fixing ring 35 is provided with a second air hole 57 connected to the first air hole 56 and the air box 2. The second air hole 57 is arranged between the first limiting ring 53 and the second limiting ring 54. The ventilation pipe 29 passes through the second through hole 27 provided on the corresponding mounting plate 3 from the first fixing ring 34 of one of the air boxes 2. After entering the second fixing ring 35 provided in the adjacent air box 2, the end of the ventilation pipe 29 contacts the slide plate 55, and the component force generated drives the slide plate 55 to slide on the second fixing ring 35 toward the side of the second limiting ring 54 until the slide plate 55 contacts the second limiting ring 54. At this time, the first air vent 56 provided at the end of the ventilation pipe 29 moves to between the first limiting ring 53 and the second limiting ring 54, thereby connecting the second air vent 57 and the ventilation hole 38 at the same time, so that the gas in one of the air boxes 2 can enter the adjacent air box 2 through the ventilation pipe 29, ensuring that the interior of each air box 2 is filled with environmentally friendly insulating gas, improving the insulation strength of the air box 2, and preventing electrical faults such as short circuit and discharge.

[0058] Preferably, Figure 7 As shown, one side of the slide plate 55 is provided with a guide rod 58 which is slidably connected to the second fixed ring 35, which guides the sliding of the slide plate 55 and prevents it from deviating from the track, causing leakage of gas inside the air box 2, resulting in a decrease in insulation strength, thereby preventing electrical faults such as short circuits and discharges; the outer side of the guide rod 58 is sleeved with a third spring 59, which is arranged between the slide plate 55 and the second fixed ring 35 to provide power for the slide plate 55 to reset, and the two sides of the first limiting ring 53 are respectively provided with a third sealing ring 60 and a fourth sealing ring 61 which are in contact with the slide plate 55 and the ventilation pipe 29, respectively realizing the sealing of the ventilation pipe 29 at the second fixed ring 35 before and after the adjacent air box 2, thereby preventing leakage of gas inside the air box 2, resulting in a decrease in insulation strength, and preventing electrical faults such as short circuits and discharges.

[0059] Example 1

[0060] The present invention provides an environmentally friendly gas insulated ring network cabinet with a side expansion structure, such as Figures 1-6 As shown, the mounting plates 3 are pre-arranged on both sides of the environmentally friendly gas insulated ring main unit 1, and three fixing plates 12 are welded on the mounting plates 3;

[0061] When it is necessary to expand the environmentally friendly gas insulated ring network cabinet 1 sideways, first bring the corresponding ring network cabinets 1 together and fix them together with bolts, then use alcohol to clean the busbar socket 4 on the outside of the ring network cabinet 1, and apply lubricant on both ends of the busbar connector 5 and the busbar socket 4, then insert one end of the busbar connector 5 into the groove 6 provided in one of the busbar sockets 4, and use the friction force generated by the contact between the groove 6 and the busbar connector 5 to limit the busbar connector 5 from sliding out of the groove 6, and then put the busbar connector 5 with one of the busbar sockets 4 into the gas box 2 of one of the ring network cabinets 1 through the inspection port 62, and pass the other end of the busbar connector 5 through the first through hole 7 provided on the two mounting plates 3 in turn, and then the first limit block 8 contacts the mounting plate 3, and contacts the mounting plate 3 through the first inclined surface 10 provided on one side of the first protrusion 9, generating The component force drives the first limit block 8 to deform slightly until the first limit block 8 passes through the mounting plate 3, and then the first limit block 8 is reset and contacts the mounting plate 3 through the first plane 11 provided on the other side of the first protrusion 9, thereby realizing the preliminary fixation of the mounting seat. At the same time, the second limit block 13 provided on the fixing plate 12 contacts the busbar socket 4, and contacts the busbar socket 4 through the second inclined surface 15 provided on the second protrusion 14. The component force generated drives the second limit block 13 to deform slightly until the second limit block 13 passes through the busbar socket 4, and then the second limit block 13 is reset and contacts the busbar socket 4 through the second plane 16 provided on the other side of the second protrusion 14. The resistance generated further strengthens the fixation of the busbar socket 4 on the mounting plate 3, thereby strengthening the stability of the overall structure and improving the connection effect of the side expansion of the environmentally friendly gas insulated ring network cabinet 1;

[0062] Then put the other busbar socket 4 into the gas box 2 of the other ring network cabinet 1, make the busbar socket 4 correspond to the other end of the busbar connector 5, and insert the other end of the busbar connector 5 into the groove 6 provided on the other busbar socket 4. Similarly, the friction force generated by the contact between the groove 6 and the other end of the busbar connector 5 is used to realize the connection between the busbar connector 5 and the other busbar socket 4. At the same time, the other busbar socket 4 is installed on the other through the cooperation between the first protrusion 9, the first inclined surface 10, the mounting plate 3, the first limit block 8, the first plane 11, the second limit block 13, the second protrusion 14, the second inclined surface 15, the busbar socket 4, and the second plane 16. On a mounting plate 3, thereby realizing the side expansion of the environmentally friendly gas insulated ring network cabinet 1 and transmitting electric energy to the adjacent ring network cabinet 1; at the same time, during the side expansion process, the other ring network cabinet 1 does not need to move closer to one of the ring network cabinets 1, so that the other end of the busbar connector 5 enters the busbar socket 4 provided in the other ring network cabinet 1, thereby avoiding the deviation of the busbar connector 5, resulting in the need to continuously adjust the position of the ring network cabinet 1 and the busbar connector 5, thereby improving the efficiency of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, and at the same time avoiding the wear of the busbar connector 5 during the side expansion process that affects the sealing and insulation effect, thereby improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1;

[0063] When the busbar connection mechanism needs to be replaced or maintained, it is only necessary to rotate the busbar socket 4 on the mounting plate 3 so that the fifth inclined surface 21 provided on the third protrusion 17 on the mounting plate 3 contacts the third inclined surfaces 19 provided on both sides of the first protrusion 9, and the resulting component force drives the first limit block 8 to deform slightly. At the same time, the sixth inclined surface 22 provided on the fourth protrusion 18 on the busbar socket 4 contacts the fourth inclined surfaces 20 provided on both sides of the second protrusion 14, and the resulting component force drives the second limit block 13 to deform slightly. The busbar socket 4 is further rotated until the first protrusion 9 and the second protrusion 14 are no longer in contact with the mounting base and the busbar socket respectively. 4 contacts, releases the restriction on the sliding of the busbar socket 4 on the mounting plate 3, and then pulls out the busbar socket 4 so that the busbar socket 4 is pulled out from the mounting seat. Similarly, unplug another busbar socket 4 on the mounting plate 3 of another ring network cabinet 1, and bring out the busbar connector 5, so that the busbar connection mechanism is disassembled from the mounting plate 3 as a whole, without releasing the connection between the two ring network cabinets 1, which is convenient for subsequent inspection and maintenance of the line of the busbar connection mechanism, and avoids forcibly pulling the busbar socket 4, which causes excessive deformation of the first limit block 8 or the second limit block 13, thereby reducing the cost required for maintaining the busbar connection mechanism.

[0064] Example 2

[0065] On the basis of Example 1, Figure 2 、 Figure 4 and Figure 5As shown, during the installation of the busbar connection mechanism, when the first limit block 8 contacts the mounting plate 3, the first inclined surface 10 cooperates with the mounting plate 3 to drive the first limit block 8 to bend and deform, so that the first sealing strip 24 can pass through the first through hole 7 smoothly. When the first limit block 8 resets and rebounds, it will drive the first sealing strip 24 to move together until the first sealing strip 24 moves between the first plane 11 and the mounting plate 3. Then the first limit block 8 is further reset and squeezes the first sealing strip 24, thereby realizing the first layer of sealing of the gap between the busbar socket 4 and the mounting plate 3, improving the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, preventing external moist air from entering the gas box 2, and preventing gas leakage inside the gas box 2, maintaining a stable gas pressure and insulation performance in the gas box 2, avoiding the decrease in insulation strength due to gas leakage, and thus preventing electrical faults such as short circuit and discharge from occurring.

[0066] In addition, a second sealing strip 25 and a third sealing strip 26 are respectively provided on both sides of the fixing plate 12, which are in contact with the busbar socket 4 and the mounting plate 3, so as to strengthen the second layer of sealing between the busbar socket 4 and the mounting plate 3, further improve the sealing insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, maintain the stable gas pressure and insulation performance in the gas box 2, avoid the decrease in insulation strength due to gas leakage, and thus prevent electrical faults such as short circuit and discharge.

[0067] Example 3

[0068] On the basis of Example 1, Figure 2 、 Figure 7 and Figure 8As shown, the second through holes 27 on the mounting plates 3 on both sides of the overall edge of the ring network cabinet 1 are blocked by the blocking blocks 28 to prevent gas leakage inside the gas box 2 from causing a decrease in insulation strength, thereby preventing electrical faults such as short circuits and discharges; at the same time, the remaining adjacent second through holes 27 are connected through the ventilation pipe 29, so that the gas boxes 2 of several ring network cabinets 1 are connected in series, and the pressure inside multiple gas boxes 2 is monitored and balanced by a control system, thereby reducing the air required for the installation of the control system and the manufacturing cost. In addition, an air inlet 30 is provided at the bottom of one of the gas boxes 2, which is connected to the air inlet pipe of the control system through the air inlet 30 to transport environmentally friendly insulating gas to the gas box 2, provide certain protection for the switching mechanism inside the gas box 2, and prevent electrical faults such as short circuits and discharges. At the same time, there is no need to set air inlets 30 and connecting pipes on the remaining gas boxes 2, further reducing The space required for installing the air box 2 and the cost required for manufacturing are reduced; a detection port 31 is provided on one side of the air box 2, one of the detection ports 31 is provided with a pressure gauge 32, and the other detection ports 31 are provided with plugs 33. Normally, the internal air pressure of multiple series-connected air boxes 2 is monitored by the pressure gauge 32 provided at a single detection port 31, and data is fed back to the control system without the need to use multiple pressure gauges 32 for detection, thereby reducing the space required for installing the air box 2 and the cost required for manufacturing; when the feedback data is abnormal, the second through holes 27 on the mounting plates 3 on both sides are blocked by the blocks 28, and the air box 2 is switched to a single sealed box body, and then the plug 33 of the detection port 31 is removed, and a temporary pressure gauge 32 is used to detect the internal air pressure of the air box 2, so as to judge the sealing condition of the single air box 2, avoid internal gas leakage of the air box 2 resulting in a decrease in insulation strength, and further prevent electrical faults such as short circuit and discharge.

[0069] Example 4

[0070] On the basis of Example 3, Figure 2 、 Figure 7 、 Figure 8 and Figure 9As shown, when it is necessary to connect the two air boxes 2, a plurality of first fixing rings 34 are provided on the mounting plate 3 of one of the air boxes 2, and a plurality of second fixing rings 35 are provided on the mounting plate 3 of the other air box 2. One end of the ventilation pipe 29 is inserted into the first fixing ring 34, and the protrusion 36 provided at the end of the ventilation pipe 29 contacts the seventh inclined surface 42 provided on one side of the third limiting block 37. The component force generated drives it to move on the first fixing ring 34. The component force generated after the guide column 41 contacts the corresponding inclined groove 40 drives the turntable 39 to rotate together, and through the cooperation of the remaining inclined grooves 40 and the guide column 41, the remaining third limiting blocks 37 are driven to move together, and at the same time, the first stop 44 on the turntable 39 is driven to move together, and the first spring 48 between the first stop 44 and the second stop 45 is compressed; so that the ventilation pipe 29 slides smoothly into the first fixing ring 34, and then one end of the ventilation pipe 29 passes through the second through hole 27 provided on the mounting plate 3 of one air box 2 and the other air box 2 in turn, so that The end of the ventilation pipe 29 enters the second fixing ring 35, and the end of the ventilation pipe 29 contacts the slide plate 55. The component force generated drives the slide plate 55 to slide on the second fixing ring 35 toward the side of the second limiting ring 54 until the slide plate 55 contacts the second limiting ring 54. At this time, the first air vent 56 provided at the end of the ventilation pipe 29 moves to between the first limiting ring 53 and the second limiting ring 54, thereby connecting the second air vent 57 and the ventilation hole 38 at the same time, so that the gas in one of the air boxes 2 can enter the adjacent air box 2 through the ventilation pipe 29, ensuring that the interior of each air box 2 is filled with environmentally friendly insulating gas, improving the insulation strength of the air box 2, and preventing electrical faults such as short circuits and discharges from occurring; at the same time, the end of the ventilation pipe 29 contacts the fourth sealing ring 61 provided on the first limiting ring 53, realizing the sealing of the second fixing ring 35 after the ventilation pipe 29 is inserted into the adjacent air box 2, avoiding gas leakage inside the air box 2 causing a decrease in insulation strength, and further preventing electrical faults such as short circuits and discharges from occurring;

[0071] In addition, during the movement of the ventilation pipe 29, the protrusion 36 provided at the end of the ventilation pipe 29 contacts the second spring 51, and the component force generated compresses the second spring 51. The component force generated by the compression of the second spring 51 is transmitted to the wedge block 49, driving the wedge block 49 to move further toward the conical sealing ring 50 until the conical surface 52 provided on one side of the wedge block 49 contacts the conical sealing ring 50. The component force generated further squeezes the conical sealing ring 50, causing it to deform and block the gap between the ventilation pipe 29 and the mounting plate 3, thereby preventing gas leakage inside the air box 2 from causing a decrease in insulation strength, and preventing electrical faults such as short circuits and discharges.

[0072] In addition, when the end of the ventilation pipe 29 is fully inserted into the second limiting ring 54, the protrusion 36 provided at the end of the ventilation pipe 29 just slides over the third limiting block 37, and the rebound force generated by the compression of the first spring 48 drives the turntable 39 to reset, so that the inclined groove 40 further contacts the guide column 41, driving the plurality of third limiting blocks 37 to reset until the third flat surface 43 provided on the other side of the third limiting block 37 contacts the other side of the protrusion 36, thereby achieving the fixation of the ventilation pipe 29 on the first fixing ring 34, preventing it from accidentally sliding under the action of external force, causing the gas leakage inside the air box 2 to cause the insulation strength to decrease, thereby preventing electrical faults such as short circuit and discharge.

[0073] Similarly, blocking blocks 28 are installed on the mounting plates 3 on both sides of the overall edge of the ring network cabinet 1, so that the blocking blocks 28 block the corresponding first through holes 7 to prevent gas leakage inside the gas box 2 from causing a decrease in insulation strength, thereby ensuring the sealing insulation performance of the side expansion of the ring network cabinet 1 and preventing electrical faults such as short circuit and discharge.

[0074] Example 5

[0075] On the basis of Example 4, Figure 7 、 Figure 8 and Figure 9 As shown, when the ventilation pipe 29 needs to be removed, the turntable 39 is rotated, and the cooperation between the inclined groove 40 and the guide column 41 drives the third limit block 37 to move outward until the third plane 43 provided on the third limit block 37 no longer contacts the ventilation pipe 29, and then the ventilation pipe 29 is pulled outward so that its bottom slides out of the second limit ring 54 and the first limit ring 53 in turn, thereby eliminating the need to separate the adjacent ring network cabinet 1 to achieve the removal of the ventilation pipe 29, simplifying the efficiency of maintenance and replacement of the ventilation pipe 29; in addition, when the ventilation pipe 29 is taken out, the rebound force generated by the compression of the third spring 59 drives the slide plate 55 to reset and move toward the first limit ring 53 until it contacts the third sealing ring 60 provided on the first limit ring 53, thereby achieving the sealing of the second fixing ring 35 after the ventilation pipe 29 is pulled out from the adjacent air box 2, avoiding the leakage of gas inside the air box 2 resulting in a decrease in insulation strength, and preventing electrical faults such as short circuit and discharge.

Claims

1. An environmentally friendly gas-insulated ring network cabinet with a side expansion structure, comprising a plurality of ring network cabinets (1), a gas box (2) being provided on the top of each ring network cabinet (1), and a busbar connection mechanism being provided between two adjacent gas boxes (2), characterized in that: Mounting plates (3) are provided on both sides of the gas box (2), the busbar connection mechanism comprises a busbar socket (4) provided on the mounting plate (3), a busbar connector (5) is provided between two adjacent busbar sockets (4), the busbar socket (4) is provided with a groove (6) for plugging and matching with the busbar connector (5), and the mounting plate (3) is provided with a first through hole (7) for the busbar connector (5) to pass through; The end of the busbar connector (5) is provided with a plurality of first limiting blocks (8), the end of the first limiting block (8) is provided with a first protrusion (9), and the two sides of the first protrusion (9) are respectively provided with a first inclined surface (10) and a first plane (11) that contact the mounting plate (3), a fixing plate (12) is provided on the mounting plate (3), and one side of the fixing plate (12) is provided with a plurality of second limiting blocks (13), the end of the second limiting block (13) is provided with a second protrusion (14), and the two sides of the second protrusion (14) are provided with There is a second inclined surface (15) and a second plane (16) in contact with the busbar socket (4); a plurality of third protrusions (17) and a fourth protrusion (18) are provided on one side of the mounting plate (3) and the busbar socket (4); a third inclined surface (19) and a fourth inclined surface (20) are provided on both sides of the first protrusion (9) and the second protrusion (14); and a fifth inclined surface (21) and a sixth inclined surface (22) in contact with the third inclined surface (19) and the fourth inclined surface (20) are provided on both sides of the third protrusion (17) and the fourth protrusion (18); A sealing groove (23) is provided on one side of the first limiting block (8), a first sealing strip (24) in contact with the mounting plate (3) is provided in the sealing groove (23), and the first sealing strip (24) is provided between the first plane (11) and the mounting plate (3); A second sealing strip (25) and a third sealing strip (26) are respectively provided on both sides of the fixing plate (12) and are in contact with the busbar socket (4) and the mounting plate (3).

2. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 1, characterized in that: The mounting plate (3) is provided with a second through hole (27), and the mounting plates (3) located on both sides of the edge are respectively provided with a plurality of blocking blocks (28) for blocking the second through hole (27), and the mounting plates (3) on the other side are respectively provided with a ventilation pipe (29) connected to the second through hole (27), an air inlet (30) is provided at the bottom of one of the air boxes (2), and a detection port (31) is provided on one side of the air box (2), a pressure gauge (32) is provided at one of the detection ports (31), and the other detection ports (31) are provided with plugs (33).

3. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 2, characterized in that: A plurality of first fixing rings (34) and a second fixing ring (35) are respectively provided on one of the mounting plates (3) of the two adjacent air boxes (2); one end of each of the ventilation pipe (29) and the blocking block (28) is provided with a protrusion (36) slidably connected to the first fixing ring (34); a plurality of third limiting blocks (37) are slidably connected to the first fixing ring (34); two sides of the protrusion (36) are in contact with the third limiting blocks (37) and the mounting plate (3), respectively; the other ends of the ventilation pipe (29) and the blocking block (28) are slidably connected to the corresponding second through hole (27); the other end of the ventilation pipe (29) extends to the second through hole (27) on the adjacent air box (2); and the ventilation pipe (29) is provided with a ventilation hole (38) communicating with the two adjacent air boxes (2).

4. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 3, characterized in that: A turntable (39) is rotatably connected to the first fixing ring (34), and a plurality of inclined slots (40) are provided on the turntable (39). The end of the third limiting block (37) is provided with a guide column (41) in sliding contact with the inclined slot (40).

5. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 4, characterized in that: A seventh inclined surface (42) and a third plane (43) are respectively provided on both sides of the third limit block (37) and are in contact with the protrusion (36). A first stopper (44) and a second stopper (45) are respectively provided on the turntable (39) and the first fixing ring (34). The first stopper (44) is provided with an arc rod (46). The second stopper (45) is provided with a guide hole (47) slidably connected to the arc rod (46). A first spring (48) is provided between the first stopper (44) and the second stopper (45) and is sleeved on the outside of the arc rod (46).

6. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 3, characterized in that: A wedge block (49) and a conical sealing ring (50) are respectively provided on the first fixing ring (34), a second spring (51) is provided between the protrusion (36) and the wedge block (49), and a conical surface (52) in contact with the conical sealing ring (50) is provided on one side of the wedge block (49).

7. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 3, characterized in that: The second fixing ring (35) is provided with a first limiting ring (53) and a second limiting ring (54), respectively. A slide plate (55) is provided between the first limiting ring (53) and the second limiting ring (54). The end of the ventilation pipe (29) contacts the slide plate (55) and drives the slide plate (55) to slide on the fixing ring. The end of the ventilation pipe (29) is provided with a plurality of first air holes (56) connected to the ventilation hole (38). The second fixing ring (35) is provided with a second air hole (57) connected to the first air hole (56) and the air box (2). The second air hole (57) is arranged between the first limiting ring (53) and the second limiting ring (54).

8. The environmentally friendly gas-insulated ring main unit with a side expansion structure according to claim 7, characterized in that: A guide rod (58) is provided on one side of the slide plate (55) and is slidably connected to the second fixing ring (35). A third spring (59) is sleeved on the outer side of the guide rod (58). The third spring (59) is arranged between the slide plate (55) and the second fixing ring (35). A third sealing ring (60) and a fourth sealing ring (61) are provided on both sides of the first limiting ring (53) and are in contact with the slide plate (55) and the ventilation pipe (29).

Images