CN111146723A

CN111146723A - Gis

Info

Publication number: CN111146723A
Application number: CN201911395504.7A
Authority: CN
Inventors: 赵利军; 李金狮; 刘亮; 徐朋冲; 殷鹏鑫; 司昌杰; 邢大淼
Original assignee: State Grid Corp of China SGCC; Pinggao Group Co Ltd; Henan Pinggao Electric Co Ltd
Current assignee: State Grid Corp of China SGCC; Pinggao Group Co Ltd; Henan Pinggao Electric Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-12
Anticipated expiration: 2039-12-30
Also published as: CN111146723B

Abstract

The invention relates to a GIS comprising: a GIS cylinder; the crank arm box is fixedly connected to the GIS barrel, and a movable contact seat is arranged at one end, close to the GIS barrel, of the crank arm box; the moving contact is assembled in the moving contact seat in a guiding way; the crank arm is arranged in the crank arm box and is in transmission connection with the moving contact; a contact seat insulator is arranged between the movable contact seat and the crank arm box, and the movable contact seat is connected to the crank arm box through the contact seat insulator to form insulation with the crank arm box; the movable contact seat is provided with a protruding part which protrudes towards the GIS barrel; a grounding terminal is arranged on the crank arm box, and a terminal insulator is arranged between the grounding terminal and the crank arm box; the grounding terminal is provided with an outer wiring end and an inner wiring end, the outer wiring end is located outside the crank arm box and used for being connected with a grounding wire, the inner wiring end is located inside the crank arm box, and a switching conductor is arranged between one side, facing the crank arm, of the moving contact seat and the inner wiring end so as to achieve connection of the grounding terminal and the moving contact seat.

Description

GIS

Technical Field

The invention relates to a GIS.

Background

Gas insulated metal enclosed switchgear (GIS for short) is an important power transmission and distribution equipment, and a grounding switch is a main component of the GIS and is used for reliable grounding of a GIS main loop. According to the use requirement of a power grid, a main circuit of the quick grounding switch adopts a special grounding wire to directly ground the power grid, and is not grounded through a GIS cylinder and a bracket. Therefore, an insulation design is needed between the moving contact of the grounding switch and the GIS cylinder.

In a GIS in the prior art, the insulation between a moving contact and a GIS cylinder is shown in fig. 1, and an insulation flange 4 is arranged between a crank arm box flange of a crank arm box 1 and a cylinder flange of a GIS cylinder 6 to realize the insulation between the crank arm box 1 and the GIS cylinder 6; connecting lever box flange, insulating flange 4 and barrel flange pass through connecting bolt 2 fixed connection to realize the fixed connection between connecting lever box 1 and the GIS barrel 6, wherein, connecting bolt 2 prevents GIS barrel 6 and connecting lever box 1 electrical intercommunication through insulating cover 3 and insulating pad 5. A movable contact seat 7 is fixedly arranged in the crank arm box 1, the movable contact seat 7 is electrically communicated with the movable contact 8, and the crank arm box 1 is connected with a special grounding wire through a bolt head of the connecting bolt 2 so as to realize grounding.

Because the insulating sleeve and the insulating pad are in the atmospheric environment, the insulating sleeve and the insulating pad are easily aged under the influence of the atmospheric environment, so that the insulation is unreliable; and the insulating pad makes connecting bolt fastening torque descend after ageing easily, and then causes the leakage of insulating gas in the GIS.

Disclosure of Invention

The invention aims to provide a GIS (geographic information system) to solve the technical problem that insulation is unreliable due to the fact that an insulation sleeve and an insulation pad in the prior art are easy to age in an atmospheric environment.

In order to achieve the purpose, the technical scheme of the GIS is as follows:

a GIS comprising: a GIS cylinder; the crank arm box is fixedly connected to the GIS barrel, and a movable contact seat is arranged at one end, close to the GIS barrel, of the crank arm box; the moving contact is assembled in the moving contact seat in a guiding manner; the crank arm is arranged in the crank arm box and is in transmission connection with the moving contact so as to drive the moving contact to be spliced and separated with and from the fixed contact in the GIS cylinder;

a contact seat insulator is arranged between the movable contact seat and the crank arm box, and the movable contact seat is connected to the crank arm box through the contact seat insulator to form insulation with the crank arm box; the movable contact seat is provided with a protruding part which protrudes towards the GIS barrel; a grounding terminal is arranged on the crank arm box, and a terminal insulator is arranged between the grounding terminal and the crank arm box; the grounding terminal is provided with an outer wiring end and an inner wiring end, the outer wiring end is located outside the crank arm box and used for being connected with a grounding wire, the inner wiring end is located inside the crank arm box, and a switching conductor is arranged between one side, facing the crank arm, of the moving contact seat and the inner wiring end so as to achieve connection of the grounding terminal and the moving contact seat.

The beneficial effects are that: the contact seat insulator is arranged between the moving contact seat and the crank arm box, and the terminal insulator is arranged between the grounding terminal and the crank arm box, so that the moving contact seat is ensured to be insulated from the crank arm box, the moving contact is grounded through the moving contact seat, the switching conductor, the grounding terminal and the grounding wire, an insulating sleeve and an insulating pad are prevented from being exposed in an atmospheric environment, and the insulating reliability is ensured; and the convex part of the movable contact seat is convex towards the GIS cylinder body, so that the space occupied by the movable contact seat in the crank arm box can be reduced, and the miniaturization of the crank arm box is facilitated. In addition, one side of the moving contact seat facing the crank arm is connected with the switching conductor, so that the switching conductor is conveniently led out.

Furthermore, the moving contact base comprises a connecting disc body and a columnar guide body, and the columnar guide body is fixedly connected to the connecting disc body; the connecting disc body is arranged on one side, close to the crank arm, of the moving contact seat and is used for being connected to the crank arm box; the columnar guide body is arranged on one side of the moving contact seat away from the crank arm and used for guiding and assembling the moving contact; the projecting portion is formed of a columnar guide body.

The beneficial effects are that: the movable contact seat comprises a connecting disc body and a columnar guide body, so that the movable contact seat is not only favorable for processing the movable contact seat, but also convenient for the movable contact seat to be arranged on the crank arm box.

Furthermore, a flange connecting disc is arranged at one end, close to the GIS barrel, of the crank arm box, and the connecting disc body is fixed on one side, facing the crank arm, of the flange connecting disc; the flange connecting disc is provided with a column body perforation for the columnar guide body of the movable contact seat to penetrate; the contact seat insulator is arranged between the flange connecting disc and the connecting disc body and/or the crank arm box, and an insulating gap or an insulating sleeve is arranged between the columnar guide body and the wall of the through hole of the column body.

The beneficial effects are that: by arranging the flange connection disc, the whole size of the movable contact seat is smaller, so that the movable contact seat is convenient to process; and the flange connection plate is a metal plate, so that the strength is high, and the stability of the moving contact in the reciprocating action process can be ensured.

Furthermore, one end of the columnar guide body, which is far away from the connecting disc body, is provided with a shielding bulge; the columnar guide body is fixedly connected with the connecting disc body through a bolt.

The beneficial effects are that: when one end of the columnar guide body is provided with the shielding protrusion, the columnar guide body and the connecting disc body are fixedly connected through the bolt, the columnar guide body is ensured to be arranged in the column body through hole, meanwhile, the column body through hole cannot be too large, and then the strength of the flange connection disc is ensured.

Furthermore, the contact seat insulator is arranged between the flange connecting disc and the connecting disc body; the flange connecting disc, the contact seat insulator and the connecting disc body are fixedly connected through a connecting bolt, and a bolt head of the connecting bolt is positioned on one side, opposite to the flange connecting disc, of the connecting disc body; the connecting bolt is sleeved with an insulating sleeve and an insulating pad to realize the insulation of the connecting bolt and the connecting disc body; one side of the connecting disc body, which faces away from the flange connecting disc, is provided with a groove, and the insulating pad is positioned in the groove.

The beneficial effects are that: avoid the switching conductor to take place to interfere with insulating pad when fixing on connecting the disk body.

Furthermore, the contact seat insulator is a contact seat insulating pad which is of an annular structure and is sleeved on the columnar guide body; the inner side of the insulating pad of the contact seat is provided with an insulating folded edge, and the insulating folded edge is positioned in the insulating gap.

The beneficial effects are that: the insulating hem is in insulating clearance, can guarantee the insulating distance between the fenestrate pore wall of column director and cylinder, and then guarantees insulating properties.

Furthermore, an opening is formed in one end, close to the GIS cylinder, of the crank arm box, and an annular step is arranged at the opening; the annular steps are arranged towards the GIS cylinder body to form annular concave portions at the opening, and the annular concave portions are used for avoiding the connecting disc body to achieve insulation between the crank arm box and the connecting disc body.

The beneficial effects are that: the insulation requirement between the crank arm box and the connecting disc body is guaranteed, and meanwhile the overall size of the crank arm box can be reduced.

Furthermore, a chamfer is arranged on one side, facing the crank arm, of the connecting disc body.

The beneficial effects are that: a chamfer is arranged on one side, facing the crank arm, of the connecting disc body so as to avoid a sharp corner of an annular step on the crank arm box, and the movable contact seat and the crank arm box are assembled more compactly.

Furthermore, an operation hole is formed in the crank arm box, and a sealing plate for sealing the operation hole is arranged at the operation hole.

The beneficial effects are that: the connecting rod box is provided with the operating hole, so that the switching conductor can be conveniently and fixedly connected to the grounding terminal and the movable contact seat.

Furthermore, the grounding terminal is embedded in the terminal insulator, and the terminal insulator is fixed on the crank arm box through a bolt.

The beneficial effects are that: the ground terminal is embedded on the terminal insulator, so that the ground terminal is conveniently insulated from the crank arm box.

Drawings

FIG. 1 is a schematic structural view of a crank arm box and a GIS cylinder body in the prior art;

FIG. 2 is a schematic structural diagram of a GIS of embodiment 1 of the present invention;

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

fig. 5 is a schematic structural view of a fixed assembly of the movable contact base and the flange connecting disc in fig. 2;

FIG. 6 is a schematic structural view of the bus bar of FIG. 2;

in fig. 1: 1-a crank arm box; 2-connecting bolts; 3-an insulating sleeve; 4-an insulating flange; 5-an insulating pad; 6-GIS cylinder body; 7-moving contact seat; 8-moving contact;

in fig. 2 to 6: 10-crank arm box; 11-an insulator; 12-a ground terminal; 13-bus bar; 131-a first bus-section; 132-a second bus-section; 14-a guide bar; 15-flange connection disc; 16-a cylindrical guide body; 17-moving contact; 18-contact base insulating pad; 19-connecting the disc body; 20-crank arm; 21-closing plate; 22-connecting bolts; 23-a metal gasket; 24-bolt insulating pads; 25-bolt insulating sleeve; 26-moving contact insulating sleeve; 27-moving contact insulating pad; 28-a roller; 29-a drive shaft; 30-folding the insulation edge; 31-an insulating gap; 32-an annular recess; 33-GIS cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Embodiment 1 of GIS of the invention:

as shown in fig. 2 and fig. 3, the GIS includes a GIS cylinder 33 and a connecting lever box 10, the connecting lever box 10 has a cylinder connecting end, the cylinder connecting end is fixedly connected with the GIS cylinder 33, a flange 15 is arranged at the cylinder connecting end, a movable contact seat is fixedly assembled on the flange 15, a movable contact 17 is assembled in the movable contact seat in a guiding manner, and the movable contact 17 is in contact with a fixed contact in the GIS cylinder 33 to realize grounding. The connecting lever box is internally provided with a connecting lever 20, the connecting lever box 10 is rotatably assembled with a driving shaft 29, one end of the connecting lever 20 is rotatably assembled on the driving shaft 29, and the other end of the connecting lever 20 is hinged with the moving contact 17, so that the moving contact 17 is driven by the connecting lever 20 to move when the driving shaft 29 drives the connecting lever 20 to swing, and the connecting and separating of the moving contact 17 and the fixed contact are realized.

As shown in fig. 2 and 4, the flange connection plate 15 is a metal plate, the flange connection plate 15 is fixedly assembled at the connection end of the cylinder body through bolts, and the flange connection plate 15 is provided with a cylinder perforation which extends along the axial direction of the movable contact. The movable contact seat comprises a connecting disc body 19 and a columnar guide body 16, the connecting disc body 19 is positioned on one side, facing the crank arm 20, of the flange connecting disc 15, and the connecting disc body 19 and the columnar guide body 16 are detachably and fixedly connected together through bolts, so that the movable contact seat is beneficial to processing. Wherein, the end of the columnar guiding body 16 far away from the connecting disc body 19 is provided with a shielding protrusion to realize shielding, and the shielding protrusion and the columnar guiding body 16 are integrally formed.

In this embodiment, the columnar guide body 16 is inserted into the column through hole of the flange connection plate 15, the columnar guide body 16 forms a protruding part, and an insulation gap 31 is left between the columnar guide body 16 and the wall of the column through hole; the connecting disc body 19 is positioned on the inner side of the flange connecting disc 15, a contact seat insulating pad 18 is arranged between the connecting disc body 19 and the flange connecting disc 15, the contact seat insulating pad 18 is of an annular structure and is sleeved on the columnar guide body 16, and therefore insulation between the movable contact seat and the flange connecting disc 15 is achieved. Wherein the contact block insulating pad 18 constitutes a contact block insulator.

In this embodiment, the insulating flange 30 is disposed on the inner side of the insulating pad 18 of the contact block, and the insulating flange 30 is disposed in the insulating gap 31 to ensure the insulating distance between the columnar guide body 16 and the wall of the through hole of the column, thereby ensuring the insulating property.

In this embodiment, the barrel link of turning arm box 10 is equipped with the opening, and the opening part is equipped with annular step, and annular step arranges towards the GIS barrel to form annular concave part 32 at the opening part, annular concave part 32 are used for dodging and connect disk body 19, when guaranteeing turning arm box 10 and being connected the insulating requirement between the disk body 19, reduce the overall dimension of turning arm box 10.

In this embodiment, a chamfer is provided on one side of the connecting disc 19 facing the crank arm 20 to avoid a sharp corner of an annular step on the crank arm box 10, so that the assembly of the movable contact block and the crank arm box 10 is more compact.

As shown in fig. 4 and 5, the connection disc 19, the contact block insulating pad 18 and the flange connection disc 15 are fixedly connected by the connection bolt 22. In order to prevent the connecting bolt 22 from electrically connecting the movable contact base and the flange connecting disc 15, a bolt insulating sleeve 25 is sleeved on the connecting bolt 22, and a bolt insulating pad 24 is arranged on the outer side of the bolt insulating sleeve 25 to ensure the insulation between the connecting disc body 19 and the connecting bolt 22. In order to prevent the bolt insulating pad 24 from being crushed by the bolt head of the connecting bolt 22, the metal gasket 23 is disposed between the bolt head of the connecting bolt 22 and the bolt insulating pad 24, and the metal gasket 23 can disperse the fastening force of the bolt head and prevent the bolt insulating pad 24 from being damaged.

Because the radial dimension of the connecting disc body 19 is relatively small, and the bus bar 13 has a certain width, in order to avoid the bolt insulating pad 24 and the metal gasket 23 interfering with the bus bar 13, a groove is arranged on one side of the connecting disc body 19 away from the cylindrical guide body 16, and the bolt insulating pad 24, the metal gasket 23 and part of the bolt head are all positioned in the groove.

As shown in fig. 2, a wire outlet is provided on the housing of the crank arm box 10, a grounding terminal 12 is inserted into the wire outlet, an insulator 11 is provided between the grounding terminal 12 and the edge of the wire outlet, the insulator 11 is used for insulating the grounding terminal 12 from the crank arm box 10, wherein the insulator 11 constitutes a terminal insulator.

In the present embodiment, the ground terminal 12 has an outer terminal and an inner terminal, and the outer terminal is located outside the crank arm case 10 for connecting a ground wire; the inner terminal is located inside the crank case 10, and the inner terminal of the ground terminal 12 is electrically connected to the connection disc 19 through the bus bar 13. The bus bar 13 constitutes a switching conductor.

As shown in fig. 6, the busbar 13 includes a first busbar section 131 and a second busbar section 132, and the first busbar section 131 and the second busbar section 132 are both L-shaped structures to avoid the crank arm 20 and the movable contact 17. The first busbar section 131 is connected with the second busbar section 132 through a bolt, one end of the first busbar section 131, which is far away from the second busbar section 132, is fixedly connected with the connecting disc body 19 through a bolt, and one end of the second busbar section 132, which is far away from the first busbar section 131, is fixedly connected with an inner connecting end of the ground terminal 12 through a bolt.

In this embodiment, the grounding terminal 12 is embedded in the insulator 11, and the insulator 11 is fixedly connected to the edge of the outlet through a bolt, so as to insulate the grounding terminal 12 from the crank arm box 10.

In this embodiment, in order to facilitate installation of the busbar 13, an operation hole is formed in the housing of the crank arm box 10, and a sealing plate 21 for sealing the operation hole is disposed at the operation hole. During assembly, the closing plate 21 is opened, and after the movable contact base and the grounding terminal 12 are installed, the busbar 13 is fixedly installed through the operation hole by using a bolt.

As shown in fig. 2 and 3, the crank arm 20 is provided with a long hole arranged along the extending direction of the crank arm 20, and one end of the movable contact 17 hinged to the crank arm 20 is slidably fitted in the long hole. Specifically, the crank arm 20 is a fork arm structure, two fork arms are provided with long holes arranged along the extending direction of the fork arm, the moving contact 17 is provided with a sliding pin in a penetrating manner, two ends of the sliding pin are assembled in the two long holes in a sliding manner, the sliding pin is sleeved with a moving contact insulating sleeve 26 and a moving contact insulating pad 27, and the two moving contact insulating pads 27 are respectively arranged at two ends of the moving contact insulating sleeve 26 so as to realize the insulation of the moving contact 17 and the sliding pin and the crank arm.

In order to avoid the deflection of the movable contact 17 during the actuation, a guide bar 14 is provided between the closing plate 21 and the connecting disc 19, the guide bar 14 being used to guide the movable contact 17. Specifically, the number of the guide rods 14 is two and is located on two sides of the movable contact 17, the movable contact 17 is rotatably equipped with a roller 28 at a position corresponding to the guide rods 14, and the roller 28 is in rolling fit with the conductive rod 14, so that the resistance of the movable contact 17 driven by the crank arm 20 when the movable contact 17 is guided is reduced.

The crank arm box 10 is fixedly connected to the GIS cylinder 33 through the cylinder connecting end. In the working process, the crank arm 20 swings from left to right under the action of the driving device, and simultaneously drives the moving contact 17 to move from left to right, so that the moving contact 17 extends out of the moving contact seat and is electrically connected with a static contact on a static contact seat in the GIS cylinder, and the static contact seat, the moving contact 17, the moving contact seat, the busbar 13, the grounding terminal 12 and the grounding wire are grounded.

Embodiment 2 of GIS of the present invention:

the difference with embodiment 1 is that the flange connection pad is an insulating base, no cylinder through hole is arranged on the flange connection pad, the moving contact base only comprises a columnar guide body, and the columnar guide body is embedded in the flange connection pad.

Embodiment 3 of GIS of the present invention:

the difference from embodiment 1 is that the connection disc body and the columnar guide body are of an integral structure, and at this time, the hole diameter of the columnar through hole on the flange connection disc is required to be larger than the maximum diameter of the columnar guide body so that the columnar guide body can pass through the flange connection disc. In other embodiments, the connecting disc body and the columnar guide body can be arranged separately, but are fixedly connected through welding.

Embodiment 4 of GIS of the present invention:

the difference from the embodiment 1 is that the flange connecting disc is an insulating base, and the chassis part is directly and fixedly connected to the flange connecting disc. In other embodiments, the flange connection disc is not required, the connection disc body is directly fixed on the crank arm box through bolts, and an insulation pad is arranged between the connection disc body and the crank arm box to realize insulation.

Embodiment 5 of GIS of the present invention:

the difference from example 1 is that instead of an insulation gap, a contact block insulation sleeve is arranged between the cylindrical guide body and the wall of the cylinder bore. It should be noted that the insulating sleeve of the contact block and the insulating pad of the contact block can be integrally arranged or can be separately arranged.

Embodiment 6 of GIS of the present invention:

the difference from the embodiment 1 is that the inner side of the insulating pad of the contact seat is not provided with an insulating folded edge, and the insulating gap between the columnar guide body and the wall of the perforated hole of the column body is ensured by the matching precision of the connecting bolt and the corresponding bolt hole.

Embodiment 7 of GIS of the invention:

the difference from the embodiment 1 is that the shell of the crank arm box is not provided with an operation hole, and at the moment, one end of the busbar connected with the grounding terminal and the connection disc body is connected with the grounding terminal or the connection disc body in an inserting manner.

Embodiment 8 of GIS of the present invention:

the difference from embodiment 1 is that the grounding terminal is fixed on the insulator by a bolt, and the insulator is fixed on the crank arm box by a bolt, so as to realize the insulation of the grounding terminal and the crank arm box. But should ensure the sealing between the grounding terminal and the insulator, and between the insulator and the crank arm box.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

A GIS comprising:

a GIS cylinder;

the crank arm box is fixedly connected to the GIS barrel, and a movable contact seat is arranged at one end, close to the GIS barrel, of the crank arm box;

the moving contact is assembled in the moving contact seat in a guiding manner;

the crank arm is arranged in the crank arm box and is in transmission connection with the moving contact so as to drive the moving contact to be spliced and separated with and from the fixed contact in the GIS cylinder;

it is characterized in that the preparation method is characterized in that,

a contact seat insulator is arranged between the movable contact seat and the crank arm box, and the movable contact seat is connected to the crank arm box through the contact seat insulator to form insulation with the crank arm box;

the movable contact seat is provided with a protruding part which protrudes towards the GIS barrel;

a grounding terminal is arranged on the crank arm box, and a terminal insulator is arranged between the grounding terminal and the crank arm box;

the grounding terminal is provided with an outer wiring end and an inner wiring end, the outer wiring end is located outside the crank arm box and used for being connected with a grounding wire, the inner wiring end is located inside the crank arm box, and a switching conductor is arranged between one side, facing the crank arm, of the moving contact seat and the inner wiring end so as to achieve connection of the grounding terminal and the moving contact seat.
2. The GIS of claim 1 wherein the movable contact block includes a connecting plate and a cylindrical guide, the cylindrical guide being fixedly connected to the connecting plate;

the connecting disc body is arranged on one side, close to the crank arm, of the moving contact seat and is used for being connected to the crank arm box;

the columnar guide body is arranged on one side of the moving contact seat away from the crank arm and used for guiding and assembling the moving contact;

the projecting portion is formed of a columnar guide body.
3. The GIS of claim 2 wherein the crank arm box is provided with a flange connection disc at one end close to the GIS barrel, and the connection disc body is fixed at one side of the flange connection disc facing the crank arm;

the flange connecting disc is provided with a column body perforation for the columnar guide body of the movable contact seat to penetrate;

the contact seat insulator is arranged between the flange connecting disc and the connecting disc body and/or the crank arm box, and an insulating gap or an insulating sleeve is arranged between the columnar guide body and the wall of the through hole of the column body.
4. The GIS of claim 3 wherein the end of the cylindrical guide body remote from the connecting disc body is provided with a shielding protrusion;

the columnar guide body is fixedly connected with the connecting disc body through a bolt.
5. The GIS of claim 4 wherein the contact block insulator is disposed between the flange plate and the connection plate;

the flange connecting disc, the contact seat insulator and the connecting disc body are fixedly connected through a connecting bolt, and a bolt head of the connecting bolt is positioned on one side, opposite to the flange connecting disc, of the connecting disc body;

the connecting bolt is sleeved with an insulating sleeve and an insulating pad to realize the insulation of the connecting bolt and the connecting disc body;

one side of the connecting disc body, which faces away from the flange connecting disc, is provided with a groove, and the insulating pad is positioned in the groove.
6. The GIS of claim 3, 4 or 5 wherein the contact block insulator is a contact block insulating pad having an annular configuration that is disposed over the cylindrical guide body;

the inner side of the insulating pad of the contact seat is provided with an insulating folded edge, and the insulating folded edge is positioned in the insulating gap.
7. The GIS according to any one of claims 2-5 wherein the end of the crank arm box near the GIS cylinder is provided with an opening, and the opening is provided with an annular step;

the annular steps are arranged towards the GIS cylinder body to form annular concave portions at the opening, and the annular concave portions are used for avoiding the connecting disc body to achieve insulation between the crank arm box and the connecting disc body.
8. The GIS of claim 7 wherein the connecting disc is chamfered on a side facing the crank.
9. The GIS of any of claims 1-5 wherein the lever box is provided with an operation hole, and a sealing plate for sealing the operation hole is arranged at the operation hole.
10. The GIS of any of claims 1-5 wherein the ground terminal is embedded in a terminal insulator that is bolted to the crank arm box.