Pole type environmentally friendly gas insulated switchgear

Abstract

The application discloses an environmental protection gas insulated switchgear of pole column type, and belongs to the field of switchgears, which comprises a gas cabinet, an environmental protection gas chamber is sealingly arranged in the gas cabinet, an isolation support and a pole column support are fixedly arranged in the environmental protection gas chamber, a disconnecting switch is fixedly arranged on the isolation support and is electrically connected with an upper conductive terminal at an upper end, a pole column circuit breaker is fixedly arranged on the pole column support and is electrically connected with a lower end of the disconnecting switch, a lower end of the pole column circuit breaker is electrically connected with a lower conductive terminal, the upper conductive terminal is sealingly arranged on an upper portion of the environmental protection gas chamber, and the lower conductive terminal is sealingly arranged on a lower portion of the environmental protection gas chamber. The upper conductive terminal, the lower conductive terminal, the disconnecting switch, the pole column circuit breaker, the isolation support and the pole column support are reasonably arranged in the gas cabinet and are improved in structure, so that the connection among the upper conductive terminal, the lower conductive terminal, the disconnecting switch and the pole column circuit breaker is more compact, the volume of the environmental protection gas chamber is smaller, and the environmental protection gas chamber is less likely to leak, thereby effectively ensuring the safety of the whole device.

Description

Technical Field

[0001] This invention relates to the field of switchgear, and in particular to a pole-type environmentally friendly gas-insulated switchgear. Background Technology

[0002] With the development of power transmission technology, the requirements for switchgear are becoming increasingly stringent, especially for environmentally friendly gas-insulated switchgear. Existing gas-insulated switchgear is relatively large, particularly the inflation chamber. A large inflation chamber requires more welding points during manufacturing, and after prolonged use, it is more prone to leakage, which can lead to catastrophic consequences. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pole-type environmentally friendly gas-insulated switchgear.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A pole-mounted environmentally friendly gas-insulated switchgear includes a gas cabinet, an upper conductive terminal, a lower conductive terminal, a disconnecting switch, a pole-mounted circuit breaker, an isolation bracket, and a pole-mounted support. The gas cabinet contains a sealed environmentally friendly gas chamber. The isolation bracket and the pole-mounted support are both fixedly mounted within the environmentally friendly gas chamber. The disconnecting switch is fixedly mounted on the isolation bracket, with its upper end electrically connected to the upper conductive terminal. The pole-mounted circuit breaker is fixedly mounted on the pole-mounted support, with its upper end electrically connected to the lower end of the disconnecting switch. The lower end of the pole-mounted circuit breaker is electrically connected to the lower conductive terminal. The upper conductive terminal is sealed on the upper part of the environmentally friendly gas chamber, and the lower conductive terminal is sealed on the lower part of the environmentally friendly gas chamber.

[0006] Further, the pole circuit breaker includes an insulating housing, a movable contact, a fixed contact, a movable conductive rod, a lower terminal, an upper terminal, and an inner conductor. The insulating housing is fixedly mounted on the pole support. The fixed contact is sealed and fixedly mounted on the bottom of the insulating housing. The upper terminal is sealed and fixedly mounted on the upper part of the insulating housing and located near the top end of the insulating housing. The upper terminal and the fixed contact are fixedly connected via the inner conductor, which is fixedly mounted inside the insulating housing. The movable contact is fixedly mounted on the end of the movable conductive rod and cooperates with the fixed contact. The movable conductive rod is electrically connected to the lower terminal. The lower terminal is sealed and fixedly mounted on the lower part of the insulating housing and located near the opening end of the insulating housing. An insulating guide sleeve is sealed and mounted on the opening of the insulating housing. An insulating guide rod is slidably mounted inside the insulating guide sleeve, and the end of the insulating guide rod is connected to the end of the movable conductive rod.

[0007] Furthermore, the disconnecting switch includes a drive insulating rotating rod, a conductive swing rod, a contact seat, an insulating seat, a first main insert, and a second main insert. The first main insert is fixedly disposed on the upper terminal. One end of the conductive swing rod is fixedly disposed on the drive insulating rotating rod, and a first main slot that mates with the first main insert is disposed on the end of the conductive swing rod. The first main insert has a through hole that mates with the drive insulating rotating rod. The contact seat is fixedly disposed on the disconnecting bracket through the insulating seat. The second main insert is fixedly disposed on the contact seat. A second main slot that mates with the second main insert is disposed on the other end of the conductive swing rod. The contact seat is electrically connected to the upper conductive terminal. An electronic movement channel is provided between the first main slot and the second main slot.

[0008] Furthermore, two first inserts electrically connected to the conductive swing rod are fixedly provided on the upper terminal block, and two second inserts electrically connected to the conductive swing rod are fixedly provided on the contact seat.

[0009] Furthermore, the insulating outer shell is provided with an upper insulating block and a lower insulating block, the upper terminal is fixedly disposed in the upper insulating block and electrically connected to the inner wire, the lower terminal is fixedly disposed in the lower insulating block, and the insulating outer shell, the upper insulating block and the lower insulating block are integrally formed.

[0010] Furthermore, a conductive plate electrically connected to the lower terminal is fixedly disposed on the inner wall of the insulating outer shell. A conductive hole is provided in the middle of the conductive plate and cooperates with the movable conductive rod. At least two first concentric conductive rings are fixedly disposed on the side wall of the conductive plate. A conductive connecting plate is fixedly disposed on the movable conductive rod. At least two second concentric conductive rings electrically connected to the first concentric conductive rings are fixedly disposed on the conductive connecting plate. A first vent hole that cooperates with the first concentric conductive ring is provided on the conductive connecting plate. A second vent hole that cooperates with the second concentric conductive ring is provided on the conductive plate.

[0011] Furthermore, the upper part of the insulating outer shell is sealed with a sealing plate, and a guide tube that cooperates with the insulating guide rod is sealed on the sealing plate. At least two annular sealing mounting grooves are provided on the inner wall of the guide tube, and a sealing ring that cooperates with the insulating guide rod is provided in the sealing mounting groove.

[0012] Furthermore, an upper wiring chamber is fixedly provided at the upper end of the gas cabinet, and the upper end of the upper conductive terminal is disposed in the upper wiring chamber.

[0013] Furthermore, a lower wiring chamber is fixedly provided on the lower part of the gas cabinet, and one end of the lower conductive terminal is disposed in the lower wiring chamber.

[0014] The beneficial effects of this invention are:

[0015] 1) In this technology, through the reasonable installation and structural improvement of the upper conductive terminal, lower conductive terminal, disconnecting switch, pole circuit breaker, disconnecting bracket and pole support in the gas cabinet, the connection between the upper conductive terminal, lower conductive terminal, disconnecting switch and pole circuit breaker is more compact, the volume of the environmental protection gas chamber is smaller, and it is less prone to gas leakage, effectively ensuring the safety of the entire equipment.

[0016] 2) In this technology, the pole circuit breaker has a more compact structure and smaller size, and occupies less space inside the gas cabinet. Furthermore, there are no exposed wires at both ends of the insulating outer casing. Therefore, even if the two ends of the pole circuit breaker are very close to the inner wall of the environmental protection gas chamber, there will be no risk of leakage.

[0017] 3) In this technology, the first and second inserts are provided so that the two ends of the conductive swing rod can make full contact to achieve electrical connection, thereby reducing the heat generated during power transmission. Attached Figure Description

[0018] Figure 1 This is the main view connection structure diagram of this gas-insulated switchgear;

[0019] Figure 2 This is a side view of the connection structure between the disconnecting switch and the pole circuit breaker.

[0020] Figure 3 This is a schematic diagram of the internal connection structure of a pole-mounted circuit breaker.

[0021] Figure 4 for Figure 3 Enlarged connection structure diagram at point A;

[0022] Figure 5 for Figure 3 Enlarged connection structure diagram at point B;

[0023] Figure 6 This is a schematic diagram of the main connection structure of the disconnector switch;

[0024] In the diagram, 1-Gas cabinet, 2-Upper conductive terminal, 3-Lower conductive terminal, 4-Disconnecting switch, 5-Pole circuit breaker, 6-Isolation bracket, 7-Pole bracket, 8-Environmentally friendly gas chamber, 9-Insulating outer casing, 10-Moving contact head, 11-Fixed contact head, 12-Moving conductive rod, 13-Lower terminal, 14-Upper terminal, 15-Inner conductor, 16-Insulating guide sleeve, 17-Insulating guide rod, 18-Drive insulating rotating rod, 19-Conductive swing rod, 20-Contact seat, 21-Insulating seat, 22-First main insert, 23-Second main insert, 24-First main slot, 25-Second main slot, 26-Electronic moving channel, 27-First auxiliary insert, 28-Second auxiliary insert, 29-Upper insulating block, 30-Lower insulating block. 31-Conductive plate, 32-Conductive hole, 33-First concentric conductive ring, 34-Conductive connecting plate, 35-Second concentric conductive ring, 36-First vent hole, 37-Second vent hole, 38-Sealing plate, 39-Guide tube, 40-Sealing mounting groove, 41-Sealing ring, 42-Upper wiring chamber, 43-Lower wiring chamber, 44-Mechanism chamber, 45-Isolation drive assembly, 46-Circuit-breaking drive assembly, 47-Isolation transmission shaft, 48-Circuit-breaking transmission shaft, 49-Support rod, 50-Short swing rod. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] See Figures 1-6 The present invention provides a technical solution:

[0027] A pole-mounted environmentally friendly gas-insulated switchgear includes a gas cabinet 1, an upper conductive terminal 2, a lower conductive terminal 3, a disconnecting switch 4, a pole-mounted circuit breaker 5, an isolation bracket 6, and a pole-mounted support 7. An environmentally friendly gas chamber 8 is sealed inside the gas cabinet 1. The isolation bracket 6 and the pole-mounted support 7 are both fixedly mounted inside the environmentally friendly gas chamber 8. The disconnecting switch 4 is fixedly mounted on the isolation bracket 6, and its upper end is electrically connected to the upper conductive terminal 2. The pole-mounted circuit breaker 5 is fixedly mounted on the pole-mounted support 7, and its upper end is electrically connected to the lower end of the disconnecting switch 4. The lower end of the pole-mounted circuit breaker 5 is electrically connected to the lower conductive terminal 3. The upper conductive terminal 2 is sealed on the upper part of the environmentally friendly gas chamber 8, and the lower conductive terminal 3 is sealed on the lower part of the environmentally friendly gas chamber 8. An upper wiring chamber 42 is fixedly mounted on the upper part of the gas cabinet 1, and the upper end of the upper conductive terminal 2 is located inside the upper wiring chamber 42. A lower wiring chamber 43 is fixedly mounted on the lower part of the gas cabinet 1, and one end of the lower conductive terminal 3 is located inside the lower wiring chamber 43. The upper wiring chamber 42 and the lower wiring chamber 43 are respectively used to protect the upper conductive terminal 2 and the lower conductive terminal 3. In the gas cabinet 1, the environmental protection gas chamber 8 is a sealed gas-filled chamber, typically filled with nitrogen. The pressure inside the environmental protection gas chamber 8 is slightly higher than the atmospheric pressure outside the gas cabinet 1. The isolation bracket 6 is used to install the disconnect switch 4, and the pole bracket 7 is used to install the pole circuit breaker 5. Inside the environmental protection gas chamber 8, the isolation bracket 6 and the pole bracket 7 can be two separate brackets or a single integrated bracket. The upper conductive terminal 2 is sealed and fixed to the top of the environmental protection gas chamber 8, and the lower conductive terminal 3 is sealed and fixed to the bottom of the environmental protection gas chamber 8. A mechanism chamber 44 is provided on one side of the gas cabinet 1. An isolation drive assembly 45 and a circuit breaker drive assembly 46 are installed within the mechanism chamber 44. Both the isolation drive assembly 45 and the circuit breaker drive assembly 46 are existing technologies. The isolation drive assembly 45 drives the isolating switch 4 to open and close via an isolation drive shaft 47. The circuit breaker drive assembly 46 drives the pole-mounted circuit breaker 5 to open and close via a circuit-breaker drive shaft 48. The isolation drive shaft 47 and the circuit-breaker drive shaft 48 pass through the side wall of the environmentally friendly gas chamber 8 and are sealed to the side wall of the environmentally friendly gas chamber 8. Current can flow sequentially through the upper conductive terminal 2, the isolating switch 4, and the pole-mounted circuit breaker 5 before flowing to the lower conductive terminal 3. Conversely, current can also flow sequentially through the lower conductive terminal 3, the pole-mounted circuit breaker 5, and the isolating switch 4 before flowing to the upper conductive terminal 2. During the opening process, the pole-mounted circuit breaker 5 is disconnected first, followed by the isolating switch 4. During the closing process, the isolating switch 4 is closed first, followed by the pole-mounted circuit breaker 5.

[0028] In some embodiments, the pole circuit breaker 5 includes an insulating housing 9, a movable contact head 10, a fixed contact head 11, a movable conductive rod 12, a lower terminal 13, an upper terminal 14, and an inner conductor 15. The insulating housing 9 is fixedly mounted on the pole bracket 7. The fixed contact head 11 is sealed and fixedly mounted on the bottom of the insulating housing 9. The upper terminal 14 is sealed and fixedly mounted on the upper part of the insulating housing 9 and is disposed near the top end of the insulating housing 9. The upper terminal 14 and the fixed contact head 11 are fixedly connected by the inner conductor 15. The inner conductor 15 is fixedly installed inside the insulating housing 9. The movable contact head 10 is fixedly installed on the end of the movable conductive rod 12 and cooperates with the fixed contact head 11. The movable conductive rod 12 is electrically connected to the lower terminal 13. The lower terminal 13 is sealed and fixedly installed on the lower part of the insulating housing 9 and is located near the opening end of the insulating housing 9. An insulating guide sleeve 16 is sealed and installed on the opening of the insulating housing 9. An insulating guide rod 17 is slidably installed inside the insulating guide sleeve 16. The end of the insulating guide rod 17 is connected to the end of the movable conductive rod 12. The movable contact head 10 and the fixed contact head 11 have circular cross-sections and rounded corners at both ends. The fixed contact head 11 is fixedly connected to the fixed conductive rod, which is fixed to the lower end of the insulating housing 9. The inner conductor 15 and the fixed conductive rod are completely encapsulated inside the insulating housing 9. One end of the inner conductor 15 is fixed to the fixed conductive rod, and the other end of the inner conductor 15 is fixed to the upper terminal 14. The upper terminal 14 is located on the upper side of the insulating housing 9, and the lower terminal 13 is located on the lower side of the insulating housing 9. The upper terminal 14 is electrically connected to the disconnecting switch 4, and the lower terminal 13 is electrically connected to the inner end of the lower conductive terminal 3 via a copper busbar. The inner end of the lower conductive terminal 3 is located inside the environmental protection gas chamber 8. The new pole circuit breaker 5 has a more compact structure and smaller size, occupying less space inside the gas cabinet 1. Furthermore, there are no exposed wires at either end of the insulating housing 9. Therefore, even if the two ends of the pole circuit breaker 5 are very close to the inner wall of the environmental protection gas chamber 8, there is no risk of leakage. The movable contact 10 is fixed to the end of the movable conductive rod 12 and is coaxially arranged. The movable conductive rod 12 is electrically connected to the lower terminal 13. Therefore, when the movable contact 10 contacts the fixed contact 11, the pole circuit breaker 5 can be energized; when the movable contact 10 separates from the fixed contact 11, the pole circuit breaker 5 cannot conduct electricity, thus disconnecting. The insulating guide sleeve 16 is sealed by the sealing plate 38, creating a vacuum environment inside. The movable contact 10 and fixed contact 11 are close together, and the opening and closing operation of the pole circuit breaker 5 is only possible under vacuum conditions. The movable contact 10, fixed contact 11, movable conductive rod 12, lower terminal 13, upper terminal 14, and inner conductor 15 are all made of existing conductive materials. The insulating outer shell 9 is made of existing epoxy resin material.The insulating guide sleeve 16 guides the movement of the insulating guide rod 17, and the insulating guide rod 17 and the insulating guide sleeve 16 are sealed together. One end of the insulating guide rod 17 is hinged to one end of the short swing rod 50, and the other end of the short swing rod 50 is fixed to the circuit-breaking drive shaft 48.

[0029] In some embodiments, the disconnect switch 4 includes a drive insulating rotating rod 18, a conductive swing rod 19, a contact seat 20, an insulating seat 21, a first main insert 22, and a second main insert 23. The first main insert 22 is fixedly disposed on the upper terminal 14. One end of the conductive swing rod 19 is fixedly disposed on the drive insulating rotating rod 18, and a first main slot 24 that mates with the first main insert 22 is disposed on the end of the conductive swing rod 19. The first main insert 22 is provided with a through hole that mates with the drive insulating rotating rod 18. The contact seat 20 is fixedly disposed on the isolation bracket 6 through the insulating seat 21. The second main insert 23 is fixedly disposed on the contact seat 20. A second main slot 25 that mates with the second main insert 23 is disposed on the other end of the conductive swing rod 19. The contact seat 20 is electrically connected to the upper conductive terminal 2. An electronic movement channel 26 is provided between the first main slot 24 and the second main slot 25. The drive insulating rotating rod 18 is fixedly connected to the isolation transmission shaft 47. The isolation drive assembly 45 drives the isolation transmission shaft 47 to rotate, which in turn drives the drive insulating rotating rod 18 to rotate. The drive insulating rotating rod 18 synchronously drives three sets of conductive swing rods 19 to rotate. The three sets of conductive swing rods 19 correspond to the three phases of electricity in the power transmission process. The first main insert 22 and the second main insert 23 are both made of conductive material. During the rotation of the conductive swing rods 19 under the action of the drive insulating rotating rod 18, the first main insert 22 remains within the first main slot 24 and does not separate. The upper end of the first main insert 22 has a groove that mates with the drive insulating rotating rod 18. The insulating seat 21 is fixed on the isolation bracket 6 to install the contact seat 20. The insulating seat 21 is made of insulating material as used in the prior art, and the contact seat 20 is made of conductive material as used in the prior art. The contact seat 20 is used to install the second main insert 23. After the conductive swing rod 19 rotates, the second main insert 23 is inserted into the second main slot 25, thus closing the circuit. After the conductive swing rod 19 rotates, the second main insert 23 is separated from the second main slot 25, thus opening the circuit. The contact seat 20 is connected to the upper conductive terminal 2 via a copper busbar as in the prior art. The electronic movement channel 26 between the first main slot 24 and the second main slot 25 serves two purposes: firstly, it facilitates power transmission by providing a larger area for electronic movement; secondly, it reduces the mass of the conductive swing rod 19. During the opening and closing process, the greater the mass of the conductive swing rod 19, the greater the impact when it stops. Therefore, reducing the mass of the conductive swing rod 19 helps to reduce the impact force. The first main insert 22 is directly and fixedly connected to the upper terminal 14, reducing other intermediate mechanical structures. This not only reduces power consumption during power transmission but also makes the connection between the disconnecting switch 4 and the pole circuit breaker 5 tighter, resulting in a more compact structure and effectively saving materials, energy, and space. A support rod 49 is fixedly installed on the isolation bracket 6. The support rod 49 cooperates with the swing end of the conductive swing rod 19. After the conductive swing rod 19 is opened, the end of the conductive swing rod 19 acts on the support rod 49.

[0030] In some embodiments, two first auxiliary plates 27 electrically connected to the conductive swing rod 19 are fixedly disposed on the upper terminal 14, and two second auxiliary plates 28 electrically connected to the conductive swing rod 19 are fixedly disposed on the contact seat 20. Both the first auxiliary plates 27 and the second auxiliary plates 28 are made of conductive materials in the prior art. The first auxiliary plates 27 cooperate with the first main plate 22 to clamp one end of the conductive swing rod 19 in the middle, with both sides of the conductive swing rod 19 contacting the two first auxiliary plates 27 respectively to achieve electrical connection. The second auxiliary plates 28 cooperate with the second main plate 23 to clamp the other end of the conductive swing rod 19 in the middle, with both sides of the conductive swing rod 19 contacting the two second auxiliary plates 28 respectively to achieve electrical connection. This connection method ensures that both ends of the conductive swing rod 19 are in full contact to achieve electrical connection, reducing heat generation during power transmission.

[0031] In some embodiments, the insulating housing 9 is provided with an upper insulating block 29 and a lower insulating block 30. An upper terminal 14 is fixedly disposed within the upper insulating block 29 and electrically connected to the inner conductor 15. A lower terminal 13 is fixedly disposed within the lower insulating block 30. The insulating housing 9, the upper insulating block 29, and the lower insulating block 30 are integrally formed. The upper insulating block 29 serves to fix the upper terminal 14 to the insulating housing 9, and the lower insulating block 30 serves to fix the lower terminal 13 to the insulating housing 9, making the entire pole circuit breaker 5 a single unit and preventing arcing between the upper and lower terminals 14 due to their close proximity. The insulating housing 9, the upper insulating block 29, and the lower insulating block 30 are all made of the same material and are integrally formed during manufacturing, effectively reducing assembly difficulty, minimizing the use of other connecting parts, and improving assembly efficiency.

[0032] In some embodiments, a conductive plate 31 electrically connected to the lower terminal 13 is fixedly disposed on the inner wall of the insulating outer shell 9. A conductive hole 32, penetrating and cooperating with the movable conductive rod 12, is disposed in the middle of the conductive plate 31. At least two first concentric conductive rings 33 are fixedly disposed on the side wall of the conductive plate 31. A conductive connecting plate 34 is fixedly disposed on the movable conductive rod 12. At least two second concentric conductive rings 35 electrically connected to the first concentric conductive rings 33 are fixedly disposed on the conductive connecting plate 34. A first vent hole 36 cooperating with the first concentric conductive rings 33 is disposed on the conductive connecting plate 34. A second vent hole 37 cooperating with the second concentric conductive rings 35 is disposed on the conductive plate 31. The outer wall of the conductive plate 31 mates with the inner wall of the insulating outer shell 9. The conductive plate 31 and the insulating outer shell 9 can be sealed together or not. The first concentric conductive ring 33 and the second concentric conductive ring 35 are coaxially arranged. During the movement of the movable conductive rod 12, the first concentric conductive ring 33 and the second concentric conductive ring 35 always maintain a full electrical connection and are interlocked. The conductive hole 32 facilitates the movement of the movable conductive rod 12. The first vent hole 36 and the second vent hole 37 are provided to facilitate the movement of the movable conductive rod 12 and to prevent the second concentric conductive ring 35 from being unable to move relative to each other due to excessive sealing.

[0033] In some embodiments, a sealing plate 38 is provided on the upper part of the insulating housing 9, and a guide tube 39 that mates with the insulating guide rod 17 is provided on the sealing plate 38. At least two annular sealing mounting grooves 40 are provided on the inner wall of the guide tube 39, and sealing rings 41 that mate with the insulating guide rod 17 are provided in the sealing mounting grooves 40. The sealing rings 41 at both ends of the guide tube 39 have a V-shaped cross-section. Alternatively, the sealing plate 38 can be integrally formed with the insulating housing 9, sealingly fixed to the inner wall of the insulating housing 9 and used to install the guide tube 39. The guide tube 39 is used to install the sealing rings 41, ensuring a sealing fit between the sealing rings 41 and the insulating guide rod 17, effectively guaranteeing a vacuum state inside the insulating housing 9.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "fix", "hinged", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A pole-type environmentally friendly gas-insulated switchgear, characterized in that: The system includes a gas cabinet (1), an upper conductive terminal (2), a lower conductive terminal (3), a disconnect switch (4), a pole circuit breaker (5), an isolation bracket (6), and a pole bracket (7). The gas cabinet (1) is sealed with an environmentally friendly gas chamber (8). The isolation bracket (6) and the pole bracket (7) are both fixedly installed in the environmentally friendly gas chamber (8). The disconnect switch (4) is fixedly installed on the isolation bracket (6) and its upper end is electrically connected to the upper conductive terminal (2). The pole circuit breaker (5) is fixedly installed on the pole bracket (7) and its upper end is electrically connected to the lower end of the disconnect switch (4). The lower end of the pole circuit breaker (5) is electrically connected to the lower conductive terminal (3). The upper conductive terminal (2) is sealed on the upper part of the environmentally friendly gas chamber (8), and the lower conductive terminal (3) is sealed on the lower part of the environmentally friendly gas chamber (8). The pole circuit breaker (5) includes an insulating housing (9), a movable contact (10), a fixed contact (11), a movable conductive rod (12), a lower terminal (13), an upper terminal (14), and an inner conductor (15). The insulating housing (9) is fixedly mounted on the pole bracket (7). The fixed contact (11) is sealed and fixedly mounted on the bottom of the insulating housing (9). The upper terminal (14) is sealed and fixedly mounted on the upper part of the insulating housing (9) and is located near the top end of the insulating housing (9). The upper terminal (14) and the fixed contact (11) are fixedly connected by the inner conductor (15). (15) Fixedly installed inside the insulating housing (9), the movable contact head (10) is fixedly installed on the end of the movable conductive rod (12) and cooperates with the fixed contact head (11), the movable conductive rod (12) is electrically connected to the lower terminal (13), the lower terminal (13) is sealed and fixedly installed on the lower part of the insulating housing (9) and is located near the opening end of the insulating housing (9), an insulating guide sleeve (16) is sealed on the opening of the insulating housing (9), an insulating guide rod (17) is sealed and slidably installed inside the insulating guide sleeve (16), and the end of the insulating guide rod (17) is connected to the end of the movable conductive rod (12); A conductive plate (31) electrically connected to the lower terminal (13) is fixedly provided on the inner wall of the insulating outer shell (9). A conductive hole (32) is provided in the middle of the conductive plate (31) and cooperates with the movable conductive rod (12). At least two first concentric conductive rings (33) are fixedly provided on the side wall of the conductive plate (31). A conductive connecting plate (34) is fixedly provided on the movable conductive rod (12). At least two second concentric conductive rings (35) electrically connected to the first concentric conductive rings (33) are fixedly provided on the conductive connecting plate (34). A first vent hole (36) cooperating with the first concentric conductive ring (33) is provided on the conductive connecting plate (34). A second vent hole (37) cooperating with the second concentric conductive ring (35) is provided on the conductive plate (31). The insulating outer shell (9) is sealed with a sealing plate (38), and the sealing plate (38) is sealed with a guide tube (39) that cooperates with the insulating guide rod (17). The inner wall of the guide tube (39) is provided with at least two annular sealing mounting grooves (40), and the sealing mounting grooves (40) are provided with sealing rings (41) that cooperate with the insulating guide rod (17).

2. The pole-type environmentally friendly gas-insulated switchgear according to claim 1, characterized in that: The disconnect switch (4) includes a drive insulating rotating rod (18), a conductive swing rod (19), a contact seat (20), an insulating seat (21), a first main insert (22), and a second main insert (23). The first main insert (22) is fixedly disposed on the upper terminal (14). One end of the conductive swing rod (19) is fixedly disposed on the drive insulating rotating rod (18), and a first main slot (24) that mates with the first main insert (22) is provided on the end of the conductive swing rod (19). The first main insert (22) is provided with... The contact seat (20) is fixedly mounted on the isolation bracket (6) via the insulating seat (21) and the contact seat (20) is fixedly mounted on the contact seat (20). The second main insert (23) is fixedly mounted on the contact seat (20). The other end of the conductive swing rod (19) is provided with a second main slot (25) that mates with the second main insert (23). The contact seat (20) is electrically connected to the upper conductive terminal (2). An electronic moving channel (26) is provided between the first main slot (24) and the second main slot (25).

3. The pole-type environmentally friendly gas-insulated switchgear according to claim 2, characterized in that: Two first inserts (27) electrically connected to the conductive swing rod (19) are fixedly provided on the upper terminal (14), and two second inserts (28) electrically connected to the conductive swing rod (19) are fixedly provided on the contact seat (20).

4. A pole-type environmentally friendly gas-insulated switchgear according to any one of claims 1-3, characterized in that: The insulating outer shell (9) is provided with an upper insulating block (29) and a lower insulating block (30). The upper terminal (14) is fixedly disposed in the upper insulating block (29) and electrically connected to the inner wire (15). The lower terminal (13) is fixedly disposed in the lower insulating block (30). The insulating outer shell (9), the upper insulating block (29) and the lower insulating block (30) are integrally formed.

5. A pole-type environmentally friendly gas-insulated switchgear according to any one of claims 1-3, characterized in that: The upper end of the gas cabinet (1) is fixedly provided with an upper wiring chamber (42), and the upper end of the upper conductive terminal (2) is located in the upper wiring chamber (42).

6. A pole-type environmentally friendly gas-insulated switchgear according to any one of claims 1-3, characterized in that: A lower wiring chamber (43) is fixedly installed on the lower part of the gas cabinet (1), and one end of the lower conductive terminal (3) is located in the lower wiring chamber (43).

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