CN110890635A - Corner unit of the GIL and GIL using the corner unit - Google Patents

Abstract

The present invention relates to a corner unit of a GIL and a GIL using the same. The corner unit of the GIL comprises a corner shell and a corner conductor, an included angle is formed between two shell sections of the corner shell, the corner conductor is fixed in the corner shell through an insulating support body, and the included angle between the two conductor sections is equal to the included angle between the two shell sections; the conductor section is provided with a conductor section connecting end used for being connected with another conductor section, wherein the conductor section connecting end of one conductor section is provided with a butting spherical surface, and the conductor section connecting end of the other conductor section is butted on the butting spherical surface and is welded and fixed with the butting spherical surface; or a spherical structure is arranged between the two conductor sections, and the conductor connecting ends of the two conductor sections are butted on the spherical surface of the spherical structure and are welded and fixed with the spherical surface of the spherical structure; the sphere center corresponding to the butt joint spherical surface or the spherical structure is positioned on an angular bisector of an included angle between the two shell sections. The scheme solves the problems of poor manufacturing universality and high cost of the existing corner unit.

Description

Corner unit of the GIL and GIL using the corner unit

technical field

The present invention relates to a corner unit of a GIL and a GIL using the same.

Background technique

GIL (Gas-Insulated Metal-Enclosed Transmission Line) is different from GIS. In GIS, L-shaped busbars and three-way busbars can often meet the layout requirements of all main wiring. In GIL, it is possible to have corner units at any angle. Therefore, it is often necessary to set a corner unit to meet the routing requirements of the GIL.

In the prior art, the corner unit of the GIL is the corner unit disclosed in the Chinese patent with the authorization bulletin number CN106785944B, and the corner unit disclosed in the Chinese patent with the authorization bulletin number CN207398381U. At present, the corner unit generally includes a corner housing and a corner conductor. The corner housing includes two housing segments with a certain angle. One end of the two housing segments is connected to each other, and the other end is provided with a flange. The flange is used to connect with other unit housings of the GIL. ; The corner conductor is fixed in the corner housing, the corner conductor and the corner housing are deflected by the same angle and are connected with other unit conductors of the GIL through the electrical contact.

However, since the corner angles required by different corner units are often different, and the corner units in the prior art are manufactured by bending corresponding equipment, which results in that the corner conductors need to be bent into different angles according to the requirements of different corner angles, and the manufacturing versatility is relatively low. Poor, high cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a GIL corner unit to solve the problems of poor manufacturing versatility and high cost of the existing corner unit. Another object of the present invention is to provide a GIL using the corner unit, which solves the problems of high cost and low assembly efficiency of the existing GIL due to poor manufacturing versatility of the corner unit.

The technical solution adopted by the corner unit of the GIL in the present invention is as follows.

Corner unit of GIL, including corner housing and corner conductor;

A corner housing, comprising two butt-connected housing segments, with an included angle between the two housing segments;

The corner conductor, which is fixed in the corner housing through an insulating support body, includes two conductor segments, and the included angle between the two conductor segments is equal to the included angle between the two housing segments;

The conductor segment has a conductor segment connection end for connecting with another conductor segment, wherein the conductor segment connection end of one conductor segment has a butt spherical surface, and the conductor segment connection end of another conductor segment is butted on the butt spherical surface and is connected with the butt spherical surface. Welding and fixing;

Alternatively, a sphere structure is provided between the two conductor segments, and the conductor connection ends of the two conductor segments are butted on the spherical surface of the sphere structure and fixed by welding with the spherical surface of the sphere structure;

The spherical center corresponding to the abutting spherical surface or the spherical structure is located on the bisector of the angle between the two outer shell segments.

Beneficial effects: By setting the butt spherical surface or the spherical structure, a corresponding conductor segment can be docked to the butt spherical surface, or both conductor segments at both ends are docked to the spherical structure, because the center of the sphere corresponding to the docking spherical surface or the spherical structure is located in the two-section shells. The angle bisector of the angle between the segments is on the bisector, so it is only necessary to adjust the angle between the conductor segments and weld the corresponding conductor segments to the spherical surface to meet the different corner angles of the corner conductors. Compared with the prior art, the manufacturing method is universal. It has good performance, which is conducive to reducing costs and improving manufacturing efficiency.

As a preferred technical solution, a conductor segment with a butt spherical surface includes a spherical body part and a rod body part, and a rod body fixing port is provided on the spherical body part, and the rod body part is butted on the rod body fixing port and is welded and fixed with the edge of the rod body fixing port.

Beneficial effects: The rod body fixing port is provided to facilitate the firm fixation of the rod body part and the sphere body part, and facilitate the positioning of the sphere body part and the rod body part.

As a preferred technical solution, the rod body part includes a spherical body connecting section welded and fixed with the spherical body part and a unit connecting section for connecting with adjacent GIL units, the unit connecting section is a hollow structure, which is close to the spherical body connecting section One end is provided with a head, and the unit connecting section is fixed on the spherical connecting section by bolts passing through the head.

Beneficial effects: The rod body adopts the form of a combination of a spherical connecting section and a unit connecting section, which is convenient to meet the length requirements of different conductor sections. It only needs to replace different unit connecting sections to meet the overall length requirements of the conductor sections. The bolt of the head is fixed on the connecting section of the spherical body with simple structure and convenient disassembly and assembly.

As a preferred technical solution, the spherical connecting section is a solid section, and the end surface of the solid section close to one end of the unit connecting section is provided with threaded holes for bolt connection.

Beneficial effects: The spherical connecting section is set as a solid section, and it is convenient to set threaded holes for the unit connecting section to be connected by bolts.

As a preferred technical solution, the length of one conductor segment provided with the butt spherical surface is smaller than the length of the other conductor segment, and the corner conductor is fixed in the corner housing through a longer conductor segment.

Beneficial effects: the length of the conductor section provided with the butt spherical surface is shorter and the weight is lighter, and the corner conductor is fixed in the corner housing through the conductor section with the longer length to meet the fixing reliability of the entire corner conductor.

As a preferred technical solution, a conductor segment for docking on the butt spherical surface includes a pipe body segment and a joint segment for connecting with adjacent GIL units, and the pipe body segment and the joint segment are inserted through the insertion stop. Mate and weld to fix.

Beneficial effects: Since the joint segment needs to be provided with a connection structure for connecting with adjacent GIL units, the corresponding conductor segment is divided into a pipe body segment and a joint segment, which facilitates the manufacture of the joint segment, and the pipe body segment and the joint segment are inserted through the insertion stop. The connection is reliable, and the connection strength and electrical conductivity can be guaranteed.

As a preferred technical solution, the connecting end of the conductor segment of the conductor segment for butting with the butting spherical surface or the spherical structure is a cylindrical structure, or the end surface of the connecting end of the conductor segment is provided with a concave portion for avoiding the spherical surface of the butting spherical surface or the spherical surface of the butting sphere .

Beneficial effects: The cylindrical structure or the concave part is convenient for positioning and matching with the spherical surface of the butt spherical surface or the spherical structure, ensuring that the axis of the conductor segment corresponds to the center of the sphere, and is also convenient for welding.

As a preferred technical solution, both ends of the corner conductor are plug-fit ends, and the plug-fit ends are used for plug-fit with the center conductor in the adjacent GIL unit.

Beneficial effects: the use of the plug-in structure can adapt to the thermal expansion and contraction of the corner housing and the corner conductor.

The technical scheme adopted by GIL in the present invention is as follows.

GIL, including a linear unit and a corner unit connected between two linear units, the corner unit including a corner housing and a corner conductor;

A corner housing, comprising two butt-connected housing segments, with an included angle between the two housing segments;

The corner conductor, which is fixed in the corner housing through an insulating support body, includes two conductor segments, and the included angle between the two conductor segments is equal to the included angle between the two housing segments;

The conductor segment has a conductor segment connection end for connecting with another conductor segment, wherein the conductor segment connection end of one conductor segment has a butt spherical surface, and the conductor segment connection end of another conductor segment is butted on the butt spherical surface and is connected with the butt spherical surface. Welding and fixing;

Alternatively, a sphere structure is provided between the two conductor segments, and the conductor connection ends of the two conductor segments are butted on the spherical surface of the sphere structure and fixed by welding with the spherical surface of the sphere structure;

The spherical center corresponding to the abutting spherical surface or the spherical structure is located on the bisector of the angle between the two outer shell segments.

Beneficial effects: By setting the butt spherical surface or the spherical structure, a corresponding conductor segment can be docked to the butt spherical surface, or both conductor segments at both ends are docked to the spherical structure, because the center of the sphere corresponding to the docking spherical surface or the spherical structure is located in the two-section shells. The angle bisector of the angle between the segments is on the bisector, so it is only necessary to adjust the angle between the conductor segments and weld the corresponding conductor segments to the spherical surface to meet the different corner angles of the corner conductors. Compared with the prior art, the manufacturing method is universal. It has good performance, which is conducive to reducing costs and improving assembly efficiency.

As a preferred technical solution, a conductor segment with a butt spherical surface includes a spherical body part and a rod body part, and a rod body fixing port is provided on the spherical body part, and the rod body part is butted on the rod body fixing port and is welded and fixed with the edge of the rod body fixing port.

Beneficial effects: The rod body fixing port is provided to facilitate the firm fixation of the rod body part and the sphere body part, and facilitate the positioning of the sphere body part and the rod body part.

As a preferred technical solution, the rod body part includes a spherical body connecting section welded and fixed with the spherical body part and a unit connecting section for connecting with adjacent GIL units, the unit connecting section is a hollow structure, which is close to the spherical body connecting section One end is provided with a head, and the unit connecting section is fixed on the spherical connecting section by bolts passing through the head.

Beneficial effects: The rod body adopts the form of a combination of a spherical connecting section and a unit connecting section, which is convenient to meet the length requirements of different conductor sections. It only needs to replace different unit connecting sections to meet the overall length requirements of the conductor sections. The bolt of the head is fixed on the connecting section of the spherical body with simple structure and convenient disassembly and assembly.

As a preferred technical solution, the spherical connecting section is a solid section, and the end surface of the solid section close to one end of the unit connecting section is provided with threaded holes for bolt connection.

Beneficial effects: The spherical connecting section is set as a solid section, and it is convenient to set threaded holes for the unit connecting section to be connected by bolts.

As a preferred technical solution, the length of one conductor segment provided with the butt spherical surface is smaller than the length of the other conductor segment, and the corner conductor is fixed in the corner housing through a longer conductor segment.

Beneficial effects: the length of the conductor section provided with the butt spherical surface is shorter and the weight is lighter, and the corner conductor is fixed in the corner housing through the conductor section with the longer length to meet the fixing reliability of the entire corner conductor.

As a preferred technical solution, a conductor segment for docking on the butt spherical surface includes a pipe body segment and a joint segment for connecting with adjacent GIL units, and the pipe body segment and the joint segment are inserted through the insertion stop. Mate and weld to fix.

Beneficial effects: Since the joint segment needs to be provided with a connection structure for connecting with adjacent GIL units, the corresponding conductor segment is divided into a pipe body segment and a joint segment, which facilitates the manufacture of the joint segment, and the pipe body segment and the joint segment are inserted through the insertion stop. The connection is reliable, and the connection strength and electrical conductivity can be guaranteed.

As a preferred technical solution, the connecting end of the conductor segment of the conductor segment for butting with the butting spherical surface or the spherical structure is a cylindrical structure, or the end surface of the connecting end of the conductor segment is provided with a concave portion for avoiding the spherical surface of the butting spherical surface or the spherical surface of the butting sphere .

Beneficial effects: The cylindrical structure or the concave part is convenient for positioning and matching with the spherical surface of the butt spherical surface or the spherical structure, ensuring that the axis of the conductor segment corresponds to the center of the sphere, and is also convenient for welding.

As a preferred technical solution, both ends of the corner conductor are plug-fit ends, and the plug-fit ends are used for plug-fit with the center conductor in the adjacent GIL unit.

Beneficial effects: the use of the plug-in structure can adapt to the thermal expansion and contraction of the corner housing and the corner conductor.

Description of drawings

Fig. 1 is the structural representation of an embodiment of GIL in the present invention, and is also the structural representation of an embodiment of the corner unit of GIL in the present invention;

Fig. 2 is a partial enlarged view of the short conductor segment in Fig. 1;

Fig. 3 is a partial enlarged view of the plug-in mating end of the long conductor segment in Fig. 1;

FIG. 4 is a schematic diagram of the theoretical cooperation state of the contact base and the plug-in conductor;

Figure 5 is a schematic diagram of the shrinkage limit state of the contact seat and the plug conductor;

FIG. 6 is a schematic diagram of the expansion limit state of the contact seat and the plug conductor.

The names of the components corresponding to the corresponding reference numbers in the figure are: 11-first linear unit, 12-second linear unit, 13-linear housing, 14-straight conductor, 20-corner unit, 21-corner housing, 22- Corner conductor, 23- Short conductor section, 231- Rod body part, 232- Head, 233- Threaded hole, 234- Ball part, 235- Ball connecting section, 236- Unit connecting section, 237- Rod body fixing port, 25 -Long conductor section, 251-tube body section, 252-connector section, 253-plug socket, 26-inflatable and pressure detection device, 30-contact seat, 31-plug conductor, 40-fixed post insulator, 41- Barrel Center Insert, 50 - Particle Trap, 51 - Outturned Hem.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 3 , an embodiment of the GIL in the present invention includes a first linear unit 11 , a second linear unit 12 and a corner unit 20 connected between the first linear unit 11 and the second linear unit 12 . The first linear unit 11 and the second linear unit 12 both include a linear housing 13 and a linear conductor 14 , and the linear conductor 14 is coaxially arranged in the linear housing 13 . The corner unit 20 includes a corner housing 21 and a corner conductor 22 . The corner housing 21 is made of aluminum tubes, and includes two butt-jointed housing segments, namely a short housing segment and a long housing segment. The end faces of the butt end of the two housing segments are cut at an angle to form a certain angle with the axial direction, and are welded after butt joints. Form a set angle. In other embodiments, the corner housing 21 can also be made by a casting process. The corner conductor 22 is fixed in the corner housing 21 through an insulating support body, and includes two conductor segments, namely a short conductor segment 23 and a long conductor segment 25, the included angle between the two conductor segments and the sandwich between the two housing segments. Angles are equal.

A conductor segment has a conductor segment connection end for connection with another conductor segment, and also a straight conductor 14 connection end for connection with a corresponding linear unit. The end of the linear conductor 14 in the first linear unit 11 is provided with a contact seat 30, and the contact seat 30 is provided with an insertion hole for the connection end of the linear conductor 14 of the short conductor segment 23 to be inserted; The end of the conductor 14 is provided with a plug connector, which is used to form a plug-in conductor 31, which is inserted into the contact seat 30 provided on the connecting end of the straight conductor 14 of the long conductor section 25, and a spring contact finger or a watch strap is arranged on the hole wall of the contact seat 30. Touch fingers to ensure flow performance. The structures of the first linear unit 11 and the second linear unit 12 may adopt the structures in the prior art, which will not be described in detail here.

The short conductor segment 23 includes a spherical body part 234 and a rod body part 231. As shown in FIG. 2, the rod body part 231 includes a spherical body connecting segment 235 welded and fixed to the spherical body part 234 and a unit connecting segment 236 for connecting with the adjacent GIL unit. , the unit connecting section 236 is a hollow structure, and its end close to the spherical connecting section 235 is provided with a head 232, and the head 232 is provided with bolt holes. The spherical connecting section 235 is a solid section, and the end surface of the solid section close to one end of the unit connecting section 236 is provided with a threaded hole 233 for bolt connection. The spherical body connecting section 235 and the unit connecting section 236 are fixedly connected by bolts passing through the head 232 . The spherical body part 234 is cast and supported, and its outer surface constitutes a butt spherical surface, and a rod body fixing port 237 is provided on it.

The long conductor section 25 includes a pipe body section 251 and a joint section 252. The end of the pipe body section 251 away from the joint section 252 is butted on the butt spherical surface and is welded and fixed to the butt spherical surface. The joint section 252 is used to connect with the linear conductor of the second linear unit 12. connect. As shown in FIG. 3 , one end of the joint section 252 is provided with a contact seat 30 into which the linear conductor 14 of the second linear unit 12 is inserted, and an annular step is formed on the outer peripheral surface of the other end, and the annular step forms an insertion stop 253, and the tube The body segment 251 is inserted into the insertion stop 253 and fixed to the joint segment 252 by welding.

There is also an inflation and pressure detection device 26 on the corner housing. Considering the size of the air chamber, the inflation rate requirements, etc., the number of inflation and pressure monitoring devices can be flexibly set, and multiple inflation and pressure monitoring devices can be installed on each corner housing 21. , you can also choose some shells not to configure.

When manufacturing the corner conductor 22, the connecting end of the conductor section of the long conductor section 25 is connected to the butt spherical surface. Since the connecting end of the conductor section of the long conductor section 25 is a cylindrical structure, it can be conveniently positioned and matched with the butting spherical surface to ensure the conductor section. The axis corresponds to the center of the sphere. Adjust the position of the long conductor segment 25 according to the design angle so that the long conductor segment 25 and the short conductor segment 23 form a set angle, and then weld the long conductor segment 25 to the butt spherical surface.

During assembly, the joint segment 252 of the long conductor segment 25 is inserted into the cylindrical central insert 41 of the fixed post insulator 40 and welded to the cylindrical central insert 41, and the radially outer end of the fixed post insulator 40 is connected to the cylindrical center insert 41. The particle catcher 50 is connected, and the outer end of the particle catcher 50 is provided with an outwardly folded edge 51, which is fixed to the end of the long housing segment for docking with the second linear unit 12 by the outwardly turned folded edge 51, so that the housing conductor remains fixed, and The center of the sphere corresponding to the butting spherical surface is located on the bisector of the angle between the two shell segments, that is, on the butting plane of the two shell segments. The first linear unit 11 and the second linear unit 12 are respectively connected to both ends of the corner unit 20 through flanges, so that the linear conductors 14 and the corresponding corner conductors 22 form a plug fit to meet the direction requirements of GIL at any angle. The fixed post insulator 40 is a weak area of insulation in the corner unit 20. A particle trap 50 is provided at the radially outer end of the fixed post insulator 40 to form a particle trap, which can form a low electric field area for capturing freely moving particles, greatly reducing the discharge probability and improving reliability.

During the operation of the GIL, under the condition that the design requirements are met, as shown in FIG. 4 , the contact base 30 and the plug conductor 31 are in a theoretical matching state, and the plug depth of the plug conductor 31 is moderate; when the temperature drops to a certain extent, the As shown in FIG. 5 , the contact base 30 and the plug conductor 31 are in the shrinking limit state, and the plug depth of the plug conductor 31 is shallow, but it can still meet the current flow requirements; when the temperature rises to a certain extent, as shown in FIG. 6 As shown, the contact seat 30 and the plug conductor 31 are in the expansion limit state, and the plug conductor 31 has a deep plug depth.

In the above embodiment, the conductor segment connection end of the short conductor segment 23 has a butt spherical surface, and the conductor segment connection end of the other conductor segment is butted on the butt spherical surface and welded and fixed to the butt spherical surface. In other embodiments, a sphere structure can also be arranged between two conductor segments, and the conductor connection ends of the two conductor segments are butted on the spherical surface of the sphere structure and are welded and fixed with the spherical surface of the sphere structure. When manufacturing the corner conductor 22, The conductor segments at both ends are butted on the spherical surface of the spherical structure to form a set angle.

In the above-described embodiment, the short conductor segment 23 includes a spherical body portion 234 and a rod body portion 231, and the rod body portion 231 includes a spherical body connecting segment 235 welded and fixed to the spherical body portion 234 and a cell connecting segment 236 for connecting with adjacent GIL units. In other embodiments, the short conductor segment 23 may also be a one-piece structure, or the rod body part 231 is provided as a whole body, and then docked with the ball body part 234 . In addition, in other embodiments, the rod portion 231 may also be inserted into the inner cavity of the spherical portion 234 . Likewise, the long conductor segments 25 may also be of one-piece construction. In addition, in other embodiments, the two conductor segments of the corner conductor 22 may also have the same length, or the long conductor segment 25 may be butted with the first linear unit 11 and the short conductor segment 23 may be butted with the second linear unit 12 .

In the above embodiment, the connection end of the straight conductor 14 of the short conductor segment 23 is in the form of a plug, and the connection end of the straight conductor 14 of the long conductor segment 25 is in the form of a socket. In other embodiments, the connection end of the straight conductor 14 of the short conductor segment 23 is in the form of a socket. It can also be in the form of a socket, and the connecting end of the straight conductor 14 of the long conductor segment 25 can also be in the form of a plug.

In the above embodiment, the long conductor section 25 of the corner conductor 22 and the corner housing 21 are fixedly connected by the fixed post insulator 40, and the long conductor section 25 is welded and fixed to the fixed support insulator. In other embodiments, the corner conductors 22 can also be fixedly connected to the corner housing 21 through the short conductor segments 23; the fixed post insulators 40 can also be replaced with other forms, such as pot insulators; in order to better support the corner conductors 22, A sliding support insulator can also be provided on the long conductor section 25 . Furthermore, in other embodiments, the long conductor segment 25 and the fixed support insulator can also be fixed in other ways, such as crimping in the prior art.

In the above embodiment, the conductor segment connecting end of the long conductor segment 25 has a cylindrical structure. In other embodiments, the conductor segment connecting end may also be provided with a concave portion for avoiding the butting spherical surface or the spherical surface of the butting sphere, depending on the spherical concave portion and the spherical surface. Butt sphere or spherical connection of butt sphere; when the ratio of the diameter of the sphere to the diameter of the conductor segment is large, the end face of the connection end of the conductor segment can also be a plane perpendicular to the axial direction of the conductor segment.

The embodiment of the corner unit of the GIL in the present invention has the same structure as the corner unit 20 described in any of the above-mentioned embodiments of the GIL, and will not be described in detail here.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will still Modifications may be made to the technical solutions described in the foregoing embodiments without creative efforts, or equivalent replacements may be made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. GIL's corner unit, including corner housing and corner conductor; A corner housing, comprising two butt-connected housing segments, with an included angle between the two housing segments; The corner conductor, which is fixed in the corner housing through an insulating support body, includes two conductor segments, and the included angle between the two conductor segments is equal to the included angle between the two housing segments; It is characterized by: The conductor segment has a conductor segment connection end for connecting with another conductor segment, wherein the conductor segment connection end of one conductor segment has a butt spherical surface, and the conductor segment connection end of another conductor segment is butted on the butt spherical surface and is connected with the butt spherical surface. Welding and fixing; Alternatively, a sphere structure is provided between the two conductor segments, and the conductor connection ends of the two conductor segments are butted on the spherical surface of the sphere structure and fixed by welding with the spherical surface of the sphere structure; The spherical center corresponding to the abutting spherical surface or the spherical structure is located on the bisector of the angle between the two outer shell segments. 2. The corner unit of GIL according to claim 1 is characterized in that: a section of conductor segment with butt spherical surface comprises a sphere part and a rod body part, and the sphere part is provided with a rod body fixing port, and the rod body part is butted on the rod body fixing port and is provided with a rod body part. It is fixed by welding with the edge of the fixing port of the rod body. 3. The corner unit of the GIL according to claim 2, wherein the rod body part comprises a spherical body connecting section welded and fixed with the spherical body part and a unit connecting section for connecting with an adjacent GIL unit, the unit connecting The segment is a hollow structure, and an end close to the spherical connecting segment is provided with a head, and the unit connecting segment is fixed on the spherical connecting segment by bolts passing through the head. 4 . The corner unit of GIL according to claim 3 , wherein the spherical connecting section is a solid section, and the end surface of the solid section close to one end of the unit connecting section is provided with threaded holes for bolt connection. 5 . 5. The corner unit of the GIL according to any one of claims 1 to 4, wherein the length of a conductor segment provided with a butt spherical surface is less than the length of the conductor segment at the other end, and the passage length of the corner conductor is longer A conductor segment is fixed in the corner housing. 6. The corner unit of GIL according to any one of claims 1 to 4, characterized in that: a section of conductor section for butt joint on the butt spherical surface comprises a pipe body section and a section for connecting with adjacent GIL units The joint section of the pipe body section and the joint section are inserted and matched through the plug-in stop and fixed by welding. 7. The corner unit of the GIL according to any one of claims 1 to 4, characterized in that: the connecting end of the conductor segment of the conductor segment for butting with the butt spherical or spherical structure is a cylindrical structure, or the conductor The end face of the connecting end of the segment is provided with a concave portion for avoiding the butting spherical surface or the spherical surface of the abutting sphere. 8. The corner unit of the GIL according to any one of claims 1 to 4, characterized in that: both ends of the corner conductor are plug-fit ends, and the plug-fit ends are used to connect with adjacent GILs The center conductor in the unit is mated. 9 . A GIL, comprising a linear unit and a corner unit connected between two linear units, wherein the corner unit is the corner unit of the GIL according to any one of claims 1 to 8 .

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