Environment-friendly gas insulation ring main unit with side expansion structure

Abstract

The invention discloses an environment-friendly gas insulation ring main unit with a side expansion structure, and mainly relates to the technical field of ring main units. Comprising a bus socket arranged on a mounting plate, a plurality of first limiting blocks are arranged at the end of the bus connector, first protrusions are arranged at the ends of the first limiting blocks, a first inclined plane and a first plane are arranged on the two sides of each first protrusion respectively, a plurality of second limiting blocks are arranged on one side of a fixing plate, and second protrusions are arranged at the ends of the second limiting blocks. A second inclined plane and a second plane which are in contact with the bus socket are arranged on two side parts of the second bulge, a plurality of third bulges and fourth bulges are arranged on one side of the mounting plate and the bus socket, and fifth inclined planes and sixth inclined planes which are in contact with the third inclined planes and the fourth inclined planes are respectively arranged on two sides of the third bulges and the fourth bulges. The bus connecting mechanism has the advantages that the problem that the bus connecting mechanism is inconvenient to install is solved, and the side expansion efficiency and the sealing insulation performance of the environment-friendly gas insulation ring main unit are improved.

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 unit uses environmentally friendly gases such as dry air, nitrogen, C4 mixed gas as insulating medium to receive and distribute electrical energy, avoiding the negative impact of traditional SF6 gas on the environment. It is widely used in urban distribution networks, smart microgrids, commercial real estate, municipal engineering and other fields.

[0003] 10kV sealed environmentally friendly gas insulated ring network cabinet generally includes switch mechanism, operating mechanism, interlocking mechanism, grounding mechanism, busbar connection mechanism, protection mechanism, control and signal mechanism, etc. Since the switch mechanism is the core part of the ring network cabinet, it is responsible for the on-off control of the circuit and needs to work in an insulated and stable environment. Therefore, the switch mechanism is generally set in a sealed box (i.e., gas box), and the gas box provides a certain protection for the switch mechanism to prevent external dust, moisture and other factors from affecting its performance, resulting in electrical faults such as short circuit and discharge. At the same time, the busbar connection mechanism set on both sides of the gas box transmits electric energy to the adjacent ring network cabinet, thereby realizing the side expansion of the ring network cabinet. The operating mechanism, interlocking mechanism, grounding mechanism, protection mechanism, and control and signal mechanism are usually installed on the cabinet frame outside the gas box or in the relevant control box for easy operation, maintenance and monitoring.

[0004] At present, when the environmentally friendly gas insulated ring network cabinet needs to be expanded sideways, alcohol is first used to clean the busbar sockets arranged on both sides of the gas box, 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 network cabinets, and then another ring network cabinet is brought close to one of the ring network cabinets, so that the other end of the busbar connector enters the busbar socket provided in the other ring network cabinet, thereby realizing the connection between the two ring network cabinets. 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 network cabinet. It is necessary to continuously adjust the position of the ring network cabinet and the busbar connector, which increases the efficiency of the side expansion of the environmentally friendly gas insulated ring network cabinet to a certain extent. At the same time, in the process of using the above steps, the busbar connector is very easy to be squeezed during the installation process. Although it has a certain elasticity, it is easy to be worn if it is misaligned for many times, affecting the sealing and insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet. Summary of the invention

[0005] The object of the present invention is to provide an environmentally friendly gas insulated ring main unit with a side expansion structure, so as to solve the problem of inconvenient installation of a busbar connection mechanism and improve the side expansion efficiency and 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 with a side expansion structure, comprising a plurality of ring main units, a gas box is arranged on the top of the ring main unit, a busbar connection mechanism is arranged between two adjacent gas boxes, mounting plates are arranged on both sides of the gas box, the busbar connection mechanism comprises a busbar socket arranged on the mounting plate, a busbar connector is arranged between two adjacent busbar sockets, the busbar socket is provided with a groove for plugging and matching with the busbar connector, and a first through hole for the busbar connector to pass through is arranged on the mounting plate;

[0008] The end of the busbar connector is provided with a plurality of first limit blocks, the end of the first limit block is provided with a first protrusion, the two sides of the first protrusion are respectively provided with a first inclined surface and a first plane that contact the mounting plate, the mounting plate is provided with a fixing plate, one side of the fixing plate is provided with a plurality of second limit blocks, the end of the second limit block is provided with a second protrusion, the two side parts of the second protrusion are provided with a second inclined surface and a second plane that contact the busbar socket, one side of the mounting plate and the busbar socket is provided with a plurality of third protrusions and a fourth protrusion, the two sides of the first protrusion and the second protrusion are respectively provided with a third inclined surface and a fourth inclined surface, and the two sides of the third protrusion and the fourth protrusion are respectively provided with a fifth inclined surface and a sixth inclined surface that contact 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 arranged between the first plane and the mounting plate.

[0010] Furthermore, 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.

[0011] Furthermore, a second through hole is provided on the mounting plate, and a plurality 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, a detection port is provided on one side of the air box, a pressure gauge is provided at one of the detection ports, and plugs are provided at the other detection ports.

[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 blocking block are 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, both sides of the protrusion are respectively in contact with the third limit blocks and the mounting plate, the other ends of the ventilation pipe and the blocking block are slidably connected to the corresponding second through holes, 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 grooves are provided on the turntable, and a guide column which is in sliding contact with the inclined groove is provided at the end of the third limit block.

[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, an arc rod is provided on the first stop block, and a guide hole slidably connected to the arc rod is provided on the second stop block, 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 convex block 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, a plurality of first air holes connected with the ventilation holes are provided at the end of the ventilation pipe, 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 slidably connected to the second fixed ring is provided on one side of the slide plate, a third spring is sleeved on the outer side of the guide rod, the third spring is arranged between the slide plate and the second fixed ring, and a third sealing ring and a fourth sealing ring in contact with the slide plate and the ventilation pipe are respectively provided on both sides of the first limiting ring.

[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 bus socket on the outside of the ring network cabinet, and apply lubricant on both ends of the bus connector and the bus socket, then insert one end of the bus connector into the groove provided in one of the bus sockets, and use the friction force generated by the contact between the groove and the bus connector to limit the bus connector from sliding out of the groove, and then put the bus connector with one of the bus sockets into the gas box of one of the ring network cabinets, and pass the other end of the bus connector through the first through hole provided on the two mounting plates in turn, and then the first limit block contacts the mounting plate, and the first protrusion, the first inclined surface, the mounting plate, and the first plane cooperate to achieve the initial fixation of the mounting seat, and at the same time, through the fixing plate, the second limit block, the bus socket, the second inclined surface, The cooperation between the first and second planes 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 put another busbar socket into the gas box of another ring network cabinet, make the busbar socket correspond to the other end of the busbar connector, and insert the other end of the busbar connector into the groove provided in the other busbar socket. Similarly, the friction force generated by the contact between the groove and the other end of the busbar connector is used to realize the connection between the busbar connector and the other busbar socket. 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, another busbar socket is installed on another 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, so that the other end of the busbar connector enters the busbar socket provided in the other ring main unit, thereby avoiding the deviation of the busbar connector, which requires continuous adjustment of the positions of the ring main unit and the busbar connector, thereby improving the efficiency of the side expansion of the environmentally friendly gas insulated ring main unit, and avoiding the wear of the busbar connector during the side expansion process, which affects 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 between the mounting plate, the third protrusion, the fifth inclined plane, the first protrusion, the third inclined plane, the first limit block, the fourth protrusion, the sixth inclined plane, the second protrusion, and the fourth inclined plane. Then, pull out the busbar socket to pull it out from the mounting seat. Similarly, unplug another busbar socket on the mounting plate of another ring network cabinet, and bring out the busbar connector, 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 is convenient for subsequent inspection and maintenance of the line of the busbar connection mechanism, and avoids forcibly pulling the busbar socket, 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 will drive 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 realizing the first layer of sealing of the gap between the busbar socket and the mounting plate, improving the sealing and insulating performance of the side expansion of the environmentally friendly gas insulated ring network cabinet, preventing external humid air from entering the gas box, and preventing gas leakage inside the gas box, maintaining a stable gas pressure and insulation performance in the gas box, avoiding the decrease of insulation strength due to gas leakage, and thus preventing electrical faults such as short circuit and discharge from occurring;

[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 of insulation strength due to gas leakage, and 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 main unit by means of blocking blocks, so as to prevent gas leakage inside the gas box from causing 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 main units in series, and monitor and balance the pressure inside multiple gas boxes through a control system, thereby reducing the air required for the installation of the control system 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 duct 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 the detection ports 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 blocks, 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 a 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 a plurality of first fixing rings on the mounting plate of one of the air boxes and a plurality of 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 rotating disk, and the first spring, and then slide the end of the ventilation pipe into the second fixing ring, and make the sliding plate contact with the second limiting ring through the cooperation among the ventilation pipe, the sliding plate, the second fixing ring, and the second limiting ring. At this time, the second fixing ring provided at the end of the ventilation pipe is A vent hole is moved between the first limiting ring and the second limiting ring, thereby connecting the second vent hole 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 the leakage of gas inside the air box causing the insulation strength to decrease, and further preventing electrical faults such as short circuits and discharges;

[0026] In addition, during the movement of the ventilation pipe, the ventilation pipe, the convex block, the second spring, the wedge block and the conical sealing ring cooperate with each other to further squeeze the conical sealing ring, causing it to deform and block the gap between the ventilation pipe and the mounting plate, thereby avoiding the leakage of gas inside the air box that causes the insulation strength to decrease, and preventing electrical faults such as short circuit and discharge from occurring;

[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, and the ventilation pipe is fixed on the first fixing ring through the cooperation among the first spring, the rotating disk, the inclined groove, the guide column, the third limiting block, the third plane and the protrusion, so as to prevent the ventilation pipe from accidentally sliding under the action of external force, causing the gas leakage inside the air box to cause the insulation strength to decrease, thereby preventing the occurrence of 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 insulation performance of the side expansion of the ring network cabinet and preventing electrical faults such as short circuits and discharges.

[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 the bottom thereof slides out from the second limit ring and the first limit ring in sequence, thereby the ventilation pipe can be removed without separating the adjacent ring network cabinets, 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 realizing the 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] Attached Figure 1 It is a structural schematic diagram of the ring network cabinet of the present invention.

[0031] Attached Figure 2 It is a schematic diagram of the structure inside the air box of the present invention.

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

[0033] Attached Figure 4 The present invention is attached Figure 3 A partial enlarged view of area A in the middle.

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

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

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

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

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

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

[0040] Numbers shown in the accompanying drawings:

[0041] 1. Ring network cabinet; 2. Gas box; 3. Mounting plate; 4. Bus socket; 5. Bus connector; 6. Groove; 7. First through hole; 8. First stopper; 9. First protrusion; 10. First inclined plane; 11. First plane; 12. Fixing plate; 13. Second stopper; 14. Second protrusion; 15. Second inclined plane; 16. Second plane; 17. Third protrusion; 18. Fourth protrusion; 19. Third inclined plane; 20. Fourth inclined plane; 21. Fifth inclined plane; 22. Sixth inclined plane; 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. Detection port; 32. Air pressure gauge; 33. Plug;

[0044] 34. First fixing ring; 35. Second fixing ring; 36. Bump; 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] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it 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 main unit with a side expansion structure, such as Figure 1-Figure 6 As shown, the top of the ring main unit 1 is provided with an air box 2, and the inside 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 circuits and discharges. Fig.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 leakage of gas 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, and the side expansion of the environmentally friendly gas insulated ring network cabinet 1 is shown; mounting plates 3 are provided on both sides of the gas box 2, and the mounting plates 3 are recessed into 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 arranged 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 materials to avoid the leakage of gas inside the gas box 2, which leads to a decrease in insulation strength and prevents electrical faults such as short circuit and discharge; the busbar socket 4 is provided with a groove 6 for plugging and matching with the busbar connector 5, and the friction force generated after the groove 6 contacts the busbar connector 5 limits the busbar connector 5 from sliding out of the groove 6, and the mounting plate 3 is provided with a first through hole 7 for the busbar connector 5 to pass through, which is used to install 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 that are 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 that are in contact with the busbar socket 4. 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 at the same time Lubricant is applied to both ends of the busbar connector 5 and the busbar socket 4, and then one end of the busbar connector 5 is inserted into the groove 6 provided in one of the busbar sockets 4. 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. Then the busbar connector 5 with one of the busbar sockets 4 is placed into the air box 2 of one of the ring network cabinets 1, and the other end of the busbar connector 5 is passed through the first through holes 7 provided on the two mounting plates 3 in sequence. 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 bus socket 4, and contacts the bus 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 bus socket 4. Then the second limit block 13 is reset and contacts the bus 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 bus 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 bus socket 4 is connected. Put it into the gas box 2 of another ring network cabinet 1, make the bus socket 4 correspond to the other end of the bus connector 5, and insert the other end of the bus connector 5 into the groove 6 provided on the other bus socket 4. Similarly, the friction force generated by the contact between the groove 6 and the other end of the bus connector 5 is used to realize the connection between the bus connector 5 and the other bus 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 bus socket 4, and the second plane 16, another bus socket 4 is installed on another 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 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 deviation of the busbar connector 5, 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, a third inclined plane 19 and a fourth inclined plane 20 are provided on both sides of the first protrusion 9 and the second protrusion 14, respectively, a fifth inclined plane 21 and a sixth inclined plane 22 in contact with the third inclined plane 19 and the fourth inclined plane 20 are provided on both sides of the third protrusion 17 and the fourth protrusion 18, respectively. 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 plane 21 provided on the third protrusion 17 on the mounting plate 3 contacts the third inclined plane 19 provided on both sides of the first protrusion 9, and the component force generated drives the first limit block 8 to deform slightly, and at the same time, the sixth inclined plane 22 provided on the fourth protrusion 18 on the busbar socket 4 contacts the fourth inclined plane 20 provided on both sides of the second protrusion 14. The first and second limit blocks 8 and 13 are in contact with each other, and 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, and the restriction on the sliding of the busbar socket 4 on the mounting plate 3 is released. Then the busbar socket 4 is pulled out, so that the busbar socket 4 is pulled out from the mounting seat. Similarly, another busbar socket 4 is unplugged on the mounting plate 3 of another ring network cabinet 1, and the busbar connector 5 is brought out, so that the busbar connecting mechanism is removed 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 connecting mechanism, and at the same time, it is avoided to pull the busbar socket 4 hard, 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 connecting 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, and 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 to between the first plane 11 and the mounting plate 3, and then the first limit block 8 is further reset and squeezes the first sealing strip 24, so as to realize the first layer of sealing of the gap between the bus socket 4 and the mounting plate 3, improve the sealing insulation performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, prevent external humid air from entering the gas box 2, and prevent gas leakage inside the gas box 2, maintain a stable gas pressure and insulation performance in the gas box 2, and avoid the decrease of insulation strength due to gas leakage, thereby preventing electrical faults such as short circuit and discharge from occurring.

[0051] Preferably, Figure 4 As shown, the second sealing strip 25 and the third sealing strip 26 in contact with the bus socket 4 and the mounting plate 3 are respectively provided on both sides of the fixing plate 12, 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 the stable gas pressure and insulation performance in the gas box 2, avoid the decrease of insulation strength due to gas leakage, and further prevent the occurrence of electrical faults such as short circuit and discharge.

[0052] Preferably, Figure 2 , Figure 7 and Figure 8As shown, 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 holes 27, 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 cause the insulation strength to decrease, thereby preventing electrical faults such as short circuits and discharges from occurring; the mounting plates 3 on one of the remaining sides are respectively provided with ventilation pipes 29 connected to the second through holes 27, 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 through a control system, thereby reducing the air required for the installation of the control system and the cost required for manufacturing. 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 circuits and discharges from occurring; an air inlet 30 is provided at the bottom of one of the air boxes 2, and the specific air inlet 30 is connected to the air inlet pipe of the control system, so as to transport environmentally friendly insulating gas to the air box 2 and provide a switch mechanism inside the air box 2. Provide a certain protection to prevent electrical faults such as short circuit and discharge. At the same time, there is no need to set an air inlet 30 and a connecting pipe on the remaining air boxes 2, further reducing the space required for the installation of the air box 2 and the manufacturing cost required; a detection port 31 is provided on one side of the air box 2, one of the detection ports 31 is provided with a barometer 32, and the remaining detection ports 31 are provided with a plug 33. Normally, the internal air pressure of multiple series-connected air boxes 2 is monitored by the barometer 32 provided at a single detection port 31. In order to control the system feedback data, there is no need to use multiple barometers 32 for detection, reducing the space required for the installation of the air box 2 and the manufacturing cost required; when the feedback data is abnormal, the second through hole 27 on the mounting plate 3 on both sides is blocked by the block 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 barometer 32 is used to detect the internal air pressure of the air box 2, so as to judge the sealing condition of a single air box 2, avoid the internal gas leakage of the air box 2 resulting in a decrease in insulation strength, and then 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, one end of the ventilation pipe 29 and the block 28 are provided with a protrusion 36 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 connecting 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 insulation strength from decreasing due to leakage of gas inside the gas box 2, thereby ensuring the sealing insulation performance of the side expansion of the ring network cabinet 1 and preventing electrical faults such as short circuits and discharges. One end of the ventilation pipe 29 passes through the first through hole 7 on the mounting plates 3 of the two gas boxes 2, and connects the two gas boxes 2 through the ventilation holes 38 provided on the ventilation pipe 29 to ensure that the internal air pressure of the two gas boxes 2 remains consistent and prevent electrical faults such as short circuits and discharges. 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 block 28 and the protrusion 36 provided at the end of the ventilation pipe 29, and the resistance generated limits the block 28 and the ventilation pipe 29 from sliding on the first fixing ring 34, thereby ensuring the stability of the overall structure and preventing the insulation strength from decreasing due to leakage of gas inside the gas box 2, thereby preventing electrical faults such as short circuits and discharges.

[0054] Preferably, Figure 7 , Figure 8 and Fig. 9 As shown, a turntable 39 is rotatably connected to the first fixed ring 34, and a plurality of inclined grooves 40 are provided on the turntable 39. A guide column 41 is provided at the end of the third limit block 37 for sliding contact with the inclined grooves 40. By rotating the turntable 39 on the first fixed ring 34, the plurality of inclined grooves 40 provided on the turntable 39 are further in contact with the corresponding guide columns 41, and the component force generated 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 slidably arranged on the first fixed ring 34, it guides the sliding of the third limit block 37, thereby driving the plurality of third limit blocks 37 to slide on the first fixed ring 34 at the same time, without sliding 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 Fig. 9 As shown, the third limit block 37 has a seventh inclined surface 42 and a third plane 43 on both sides thereof which are in contact with the protrusion 36, respectively; the turntable 39 and the first fixing ring 34 have a first stopper 44 and a second stopper 45, respectively; the first stopper 44 has an arc rod 46, and the second stopper 45 has a guide hole 47 which is slidably connected with the arc rod 46, which guides the movement of the first spring 48 to prevent it from deviating from the specified track; a first spring 48 which is sleeved on the outside of the arc rod 46 is provided between the first stopper 44 and the second stopper 45; 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 with the seventh inclined surface 42 provided on one side of one of the corresponding third limit blocks 37, and the component force generated drives it to move on the first fixing ring 34, and the force generated after the guide column 41 contacts the corresponding inclined groove 40 The force distribution 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 block 44 on the turntable 39 to move together, and compress the first spring 48 between the first stop block 44 and the second stop block 45, until the protrusion 36 completely passes through the corresponding third limit block 37, and 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, drive 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 realizing the fixation of the blocking block 28 and the ventilation pipe 29 on the first fixing ring 34, avoiding their unintentional 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 from occurring.

[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, 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. When the blocking block 28 and the ventilation pipe 29 enter the corresponding first fixing ring 34, the corresponding protrusions 36 respectively provided on the blocking block 28 and the ventilation pipe 29 contact the second spring 51, and the component force generated compresses the second spring 51. The component force generated after the second spring 51 is compressed 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, and 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 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.

[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, 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 with the ventilation holes 38, the second fixing ring 35 is provided with a second air hole 57 connected with 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 hole 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 hole 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, thereby 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, a guide rod 58 is provided on one side of the slide plate 55, which is slidably connected to the second fixed ring 35, and guides the sliding of the slide plate 55 to prevent it from deviating from the track, so that the internal gas leakage of the air box 2 causes the insulation strength to decrease, thereby preventing electrical faults such as short circuits and discharges from occurring; a third spring 59 is sleeved on the outer side of the guide rod 58, and the third spring 59 is arranged between the slide plate 55 and the second fixed ring 35 to provide power for the slide plate 55 to reset. A third sealing ring 60 and a fourth sealing ring 61 are respectively provided on both sides of the first limiting ring 53, 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 the internal gas leakage of the air box 2 from causing the insulation strength to decrease, and preventing electrical faults such as short circuits and discharges from occurring.

[0059] Example 1

[0060] The present invention provides an environmentally friendly gas insulated ring main unit with a side expansion structure, such as Figure 1-Figure 6 As shown, the mounting plates 3 are respectively 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 laterally, first bring the corresponding ring network cabinets 1 together and fix them together with bolts, then use alcohol to clean the bus socket 4 on the outside of the ring network cabinet 1, and apply lubricant to both ends of the bus connector 5 and the bus socket 4, then insert one end of the bus connector 5 into the groove 6 provided in one of the bus sockets 4, and use the friction force generated after the groove 6 contacts the bus connector 5 to limit the bus connector 5 from sliding out of the groove 6, and then put the bus connector 5 with one of the bus 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 bus 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, so as to realize the preliminary fixation of the mounting seat. At the same time, the second limit block 13 provided on the fixing plate 12 contacts the bus socket 4, and contacts the bus 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 bus socket 4, and then the second limit block 13 is reset and contacts the bus 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 bus 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 another busbar socket 4 into 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 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 limiting block 8, the first plane 11, the second limiting 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, the side expansion of the environmentally friendly gas insulated ring network cabinet 1 is realized, and electric energy is transmitted 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 positions 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 to affect 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, and further rotate the busbar socket 4 until the first protrusion 9 and the second protrusion 14 are no longer in contact with the mounting seat and the busbar socket, respectively. 4 are in contact, the restriction on the sliding of the busbar socket 4 on the mounting plate 3 is released, and then the busbar socket 4 is pulled out, so that the busbar socket 4 is pulled out from the mounting seat. Similarly, another busbar socket 4 is pulled out on the mounting plate 3 of another ring network cabinet 1, and the busbar connector 5 is taken out, so that the busbar connecting 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 connecting mechanism, and at the same time, it is avoided to pull the busbar socket 4 hard, 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 connecting 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 limit block 8 is driven to bend and deform through the cooperation of the first inclined surface 10 and the mounting plate 3, so that the first sealing strip 24 can smoothly pass through the first through hole 7. When the first limit block 8 is reset and rebounded, it will drive the first sealing strip 24 to move together until the first sealing strip 24 moves to 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, so as to achieve the first layer of sealing of the gap between the busbar socket 4 and the mounting plate 3, improve the sealing and insulating performance of the side expansion of the environmentally friendly gas insulated ring network cabinet 1, prevent the external humid air from entering the gas box 2, and prevent the internal gas leakage of the gas box 2, maintain the stable gas pressure and insulation performance in the gas box 2, and avoid the decrease of insulation strength due to gas leakage, thereby 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 in contact with the busbar socket 4 and the mounting plate 3 are respectively provided on both sides of the fixing plate 12, 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 of insulation strength due to gas leakage, and further prevent the occurrence of 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 the 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 through 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 air boxes 2, which is connected to the air inlet pipeline of the control system through the air inlet 30, so that environmentally friendly insulating gas is transported to the air box 2, and a certain protection is provided for the switch mechanism inside the air box 2, preventing 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 air 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 there is no need to use multiple pressure gauges 32 for detection to control system feedback data, 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 from occurring.

[0069] Example 4

[0070] On the basis of Example 3, Figure 2 , Figure 7 , Figure 8 and Fig. 9As shown, when it is necessary to connect two air boxes 2, a plurality of first fixing rings 34 are pre-arranged on the mounting plate 3 of one of the air boxes 2, and a plurality of second fixing rings 35 are pre-arranged on the mounting plate 3 of the other air box 2, and 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, 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 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 stopper 44 on the turntable 39 is driven to move together, and the first spring 48 between the first stopper 44 and the second stopper 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 of the air boxes 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 hole 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 hole 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, so as to achieve sealing at the second fixing ring 35 after the ventilation pipe 29 is inserted into the adjacent air box 2, avoiding leakage of gas inside the air box 2 resulting in 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 after the second spring 51 is compressed is transmitted to the wedge block 49, driving the wedge block 49 to further move 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, and 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 avoiding the leakage of gas inside the air box 2 and causing the insulation strength to decrease, and preventing electrical faults such as short circuit and discharge from occurring;

[0072] In addition, when the end of the ventilation pipe 29 is completely 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, and drives a plurality of third limiting blocks 37 to reset until the third plane 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 from occurring;

[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 circuits and discharges.

[0074] Example 5

[0075] On the basis of Example 4, Figure 7 , Figure 8 and Fig. 9 As shown, when the ventilation pipe 29 needs to be removed, the turntable 39 is rotated, and the third limit block 37 is driven to move outward through the cooperation between the inclined groove 40 and the guide column 41, until the third plane 43 provided on the third limit block 37 is no longer in contact with 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 the ventilation pipe 29 can be removed without separating the adjacent ring network cabinet 1, 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 realizing the sealing at 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 main unit with a side expansion structure, comprising a plurality of ring main units (1), a gas box (2) being arranged on the top of the ring main unit (1), a busbar connection mechanism being arranged between two adjacent gas boxes (2), characterized in that: The gas box (2) is provided with mounting plates (3) on both sides respectively, the busbar connection mechanism comprises a busbar socket (4) arranged 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 limit blocks (8), the end of the first limit block (8) is provided with a first protrusion (9), both sides of the first protrusion (9) are respectively provided with a first inclined surface (10) and a first plane (11) that are in contact with the mounting plate (3), the mounting plate (3) is provided with a fixing plate (12), 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 both 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) are provided, 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).

2. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 1, characterized in that: 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 arranged between the first plane (11) and the mounting plate (3).

3. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 1, characterized in that: A second sealing strip (25) and a third sealing strip (26) which are in contact with the busbar socket (4) and the mounting plate (3) are respectively provided on both sides of the fixing plate (12).

4. 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 ventilation pipes (29) connected with the second through hole (27), and 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), and a pressure gauge (32) is provided at one of the detection ports (31), and plugs (33) are provided at the other detection ports (31).

5. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 4, 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 the ventilation pipe (29) and the blocking block (28) are 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 respectively in contact with the third limiting blocks (37) and the mounting plate (3); the other ends of the ventilation pipe (29) and the blocking block (28) are slidably connected to the corresponding second through holes (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) connecting the two adjacent air boxes (2).

6. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 5, characterized in that: A rotating disk (39) is rotatably connected to the first fixing ring (34), a plurality of inclined grooves (40) are provided on the rotating disk (39), and a guide column (41) is provided at the end of the third limiting block (37) for sliding contact with the inclined groove (40).

7. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 6, characterized in that: A seventh inclined surface (42) and a third plane (43) in contact with the protrusion (36) are respectively provided on both sides of the third limit block (37); a first stop block (44) and a second stop block (45) are respectively provided on the rotating disk (39) and the first fixing ring (34); an arc-shaped rod (46) is provided on the first stop block (44); a guide hole (47) slidably connected to the arc-shaped rod (46) is provided on the second stop block (45); and a first spring (48) sleeved on the outside of the arc-shaped rod (46) is provided between the first stop block (44) and the second stop block (45).

8. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 5, 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).

9. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 5, characterized in that: The second fixing ring (35) is respectively provided with a first limiting ring (53) and a second limiting ring (54); 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 with the ventilation holes (38); the second fixing ring (35) is provided with second air holes (57) connected with the first air holes (56) and the air box (2); the second air holes (57) are arranged between the first limiting ring (53) and the second limiting ring (54).

10. The environmentally friendly gas insulated ring main unit with a side expansion structure according to claim 9, characterized in that: A guide rod (58) slidably connected to the second fixing ring (35) is provided on one side of the slide plate (55); 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); and a third sealing ring (60) and a fourth sealing ring (61) in contact with the slide plate (55) and the ventilation pipe (29) are respectively provided on both sides of the first limiting ring (53).

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