CN214755152U

CN214755152U - A grounding diversion bar fixing device for GIS equipment and grounding switch equipment

Info

Publication number: CN214755152U
Application number: CN202022994567.9U
Authority: CN
Inventors: 杨向龙; 刘恩歌; 李雪曼; 卢鹏; 郭浩; 张向娟; 宋丽君; 刘菁松; 刘俊杰; 王希; 马万里
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: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-11-16
Anticipated expiration: 2030-12-14

Abstract

The utility model relates to a grounding diversion row fixing device for GIS equipment and grounding switch equipment. A grounding diversion bar fixing device for grounding switch equipment, comprising: first and second metal hoop bodies, the first metal hoop body is connected with a diversion bar support arm, for the grounding diversion bar to be fixedly connected by diversion bar bolts; A cylinder insulation barrier is provided between the first and second metal hoop bodies and the busbar cylinder; at least one end of the first metal hoop body is provided with a first connection flange, and the corresponding end of the second metal hoop body is provided with a second connection Flange, the first and second connecting flanges are fixedly connected by hoop bolts; a flange insulating barrier is arranged between the first and second connecting flanges, and the inner walls of the bolt holes on the first and second connecting flanges are connected to the A bolt insulating spacer is arranged between the bolts of the hoop body; the flange insulating spacer and the bolt insulating spacer are used to prevent electromagnetic circulation between the first and second metal hoop bodies. The above solution can solve the problem that the existing grounding diverter bar is easy to sway due to the large span.

Description

Fixing device is arranged to GIS equipment and earthing switch equipment's ground connection water conservancy diversion

Technical Field

The utility model relates to a fixing device is arranged to GIS equipment and earthing switch equipment's ground connection water conservancy diversion.

Background

Gas Insulated metal enclosed Switchgear (GIS) is referred to as SF₆The gas is an insulating medium, and the circuit breaker, the disconnecting switch, the grounding switch, the current transformer, the inlet and outlet wire sleeve and the like are integrated into a group of modulesGas-insulated enclosed switchgear has been widely used in recent years in substations because of its advantages of little influence on the operation by the external environment, no need of frequent maintenance, and small floor space. In practical applications, according to the relevant standard specification requirements: the grounding terminals of the grounding switch and the quick grounding switch are insulated from the shell and then grounded, and the grounding wire at the position is directly grounded, so the grounding terminal used for being conducted with the grounding static contact in the grounding switch equipment (including the grounding switch and the quick grounding switch) is directly grounded through the grounding guide bar.

Referring to fig. 1, a structure diagram of a grounding system of a current grounding switch device includes a grounding switch device 91, a grounding current guide row 92 connected to a grounding terminal at a crank box of the grounding switch device 91 is arranged in a zigzag manner, extends downward first after being led out from the grounding terminal, extends outward along a radial direction of a bus cylinder 93 in a horizontal direction, extends axially along the bus cylinder 93, and directly introduces a fault current into a grounding grid through three sections of grounding current guide rows 92. One end of the first grounding diversion row 92 is fixed on the grounding terminal of the grounding switch device 91, the other end is fixed on the sleeve support through the fixed support, and the middle part of the second grounding diversion row 92 is in a free state without any fixing measures. When the horizontal distance L between the grounding point at the crank arm box of the grounding switch device 91 and the grounding point of the grounding grid is large, the horizontally placed grounding diversion row has a large span, and when the grounding diversion row receives the acting forces of wind power, earthquake and the like, a large swinging phenomenon can occur, so that the safe and stable operation of the HGIS main device is seriously influenced. Particularly, in the GIS project, a fast grounding switch is basically configured for each phase, and the GIS project is mostly outdoor stations and is greatly influenced by wind power, so that the problem of swing of the grounding guide bar needs to be considered.

Chinese patent publication No. CN108365483A discloses a flow guide row assembly and a GIS device having the same, wherein the flow guide row is an alternate flow guide row arranged between adjacent tower-shaped cylinders, and is used for guiding an induced current. In order to avoid the deformation of the middle position caused by the overlarge interval of the flow guide row, a supporting structure used for supporting the interphase flow guide row is further arranged between the two tower-shaped cylinders, the supporting structure adopts a hoop, and an H-shaped supporting frame is arranged on the hoop and used for supporting the flow guide row and enabling the flow guide row to axially slide along the bus cylinder.

However, the ground busbar needs to conduct fault current during operation, the current is large, the electromotive force is strong, the interphase busbar structure for conducting induced current cannot be directly applied, and the support structure of the interphase busbar in the patent document is complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fixing device is arranged to earthing water conservancy diversion of earthing switch device solves current earthing water conservancy diversion and arranges because the great easy problem that sways of span. Another object of the utility model is to provide a GIS equipment can avoid ground connection water conservancy diversion to arrange because the span is great and sway easily, improves operational reliability.

The utility model discloses in a ground switch equipment's ground connection water conservancy diversion row fixing device adopts following technical scheme:

a grounding shoe fixture for a grounding switch apparatus, comprising:

the first metal hoop body is used for being buckled on one radial side of the bus cylinder body and is connected with a guide row supporting arm, and the guide row supporting arm is used for fixedly connecting the grounding guide row positioned on one radial side of the bus cylinder body through a guide row bolt;

the second metal hoop body is buckled on the other radial side of the bus tube body and used for encircling the first metal hoop body to form a complete circular hoop body so as to be hooped and fixed on the bus tube body;

a cylinder insulating interlayer is arranged between the first metal hoop body and the bus cylinder body, between the second metal hoop body and the bus cylinder body, and is used for insulating the bus cylinder body from the first metal hoop body and the second metal hoop body;

at least one end of the first metal hoop body is provided with a first connecting flange, the corresponding end of the second metal hoop body is provided with a second connecting flange, the first connecting flange and the second connecting flange are fixedly connected through hoop body bolts, a flange insulating interlayer is arranged between the first connecting flange and the second connecting flange, and the flange insulating interlayer is used for insulating the first connecting flange and the second connecting flange from each other;

bolt through holes for the hoop body bolts to penetrate through are formed in the first connecting flange and the second connecting flange, and bolt insulating interlayers are arranged between the inner walls of the bolt through holes and the hoop body bolts; the bolt insulating interlayer is used for insulating the hoop body bolt and the inner wall of the bolt through hole;

the flange insulating interlayer and the bolt insulating interlayer are used for forming a breakpoint between the first metal hoop body and the second metal hoop body and preventing electromagnetic circulation from being formed between the first metal hoop body and the second metal hoop body.

Has the advantages that: by adopting the technical scheme, the first metal hoop body, the second metal hoop body and the solid bolt can be firmly fixed on the periphery of the bus barrel, and further can be fixed with the grounding guide bar through the guide bar supporting arm on the first metal hoop body to form a support for the grounding guide bar; meanwhile, the cylinder insulation interlayer can form insulation between the first metal hoop body and the bus cylinder body, the fault current is guaranteed to be conducted along the grounding current conducting bar according to a set path, electromagnetic circulation can be avoided from being formed between the first metal hoop body and the second metal hoop body, and normal operation of the grounding current conducting bar fixing device is guaranteed.

As a preferred technical scheme: and an insulating layer is arranged on the outer surface of the hoop body bolt to form the bolt insulating interlayer.

Has the advantages that: adopt above-mentioned technical scheme simple structure, dismantle convenient assembling.

As a preferred technical scheme: the insulating layer on the outer surface of the hoop body bolt is formed by a passivation process.

Has the advantages that: the technical scheme is mature in technology, low in cost and good in insulating property.

As a preferred technical scheme: an insulating partition plate is arranged between the first connecting flange and the second connecting flange, and the flange insulating interlayer is formed by the insulating partition plate.

Has the advantages that: by adopting the technical scheme, the insulation between the flanges is convenient to realize, and the reliability is good.

As a preferred technical scheme: the flow guide row supporting arm is of a U-shaped structure with a downward opening and is integrally bent and formed with the first metal hoop body by a plate; one end of the diversion row supporting arm is connected with the first metal hoop body, and the other end of the diversion row supporting arm forms a diversion row connecting folding edge for being fixedly connected with a grounding diversion row.

Has the advantages that: by adopting the technical scheme, the arrangement position of the existing grounding diversion row can be adapted, and the grounding diversion row is conveniently connected.

As a preferred technical scheme: the flow guide row bolt is a hot galvanizing bolt.

Has the advantages that: by adopting the technical scheme, the hot-dip galvanized bolt is low in cost, good in corrosion resistance and strong in environmental adaptability.

As a preferred technical scheme: an inclined reinforcing rib plate is arranged between at least one vertical part of the flow guide row supporting arm and the horizontal part of the flow guide row supporting arm.

Has the advantages that: by adopting the technical scheme, the structural strength of the flow guide row supporting arm can be enhanced, and the supporting reliability is ensured.

As a preferred technical scheme: the grounding diversion row fixing device further comprises a fixing clamp plate, and the fixing clamp plate is used for pressing the grounding diversion row onto the diversion row supporting arm through a diversion row bolt.

Has the advantages that: by adopting the technical scheme, the grounding guide bar can be prevented from being damaged by the guide bar bolt, and the fixing is reliable.

As a preferred technical scheme: the cylinder insulating interlayer is formed by a rubber plate.

Has the advantages that: by adopting the technical scheme, the insulation between the bus tube body and the hoop body can be avoided, and meanwhile, the bus tube body can be prevented from being damaged by the hoop body.

The utility model discloses well GIS equipment adopts following technical scheme:

GIS equipment, including:

the grounding switch equipment is provided with a grounding terminal for grounding a grounding static contact of the grounding switch equipment;

the bus tube body is connected with the shell of the grounding switch and used for arranging a bus;

the grounding diversion row is connected to the grounding terminal and used for realizing grounding diversion;

further comprising: a grounding guide bar fixing device;

fixing device is arranged to ground connection water conservancy diversion includes:

For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.

Drawings

Fig. 1 is a schematic structural diagram of a grounding current guide of a quick grounding switch part of a GIS device in the prior art;

fig. 2 is a schematic structural diagram of the fast grounding switch in embodiment 1 of the GIS device of the present invention;

FIG. 3 is a top view of FIG. 2;

the names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a fast grounding switch; 12. a bus bar barrel; 13. a grounding guide bar; 21. a first ferrule body; 22. a first connecting flange; 23. a second ferrule body; 24. a second connecting flange; 31. a barrel insulating interlayer; 32. a flange insulating interlayer; 33. a hoop body bolt; 41. a guide row supporting arm; 42. the diversion row is connected with the hem; 43. a flow guide row bolt; 44. inclining the reinforcing rib plate; 45. and fixing the splint.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as the terms 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, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model discloses embodiment 1 of well GIS equipment:

as shown in fig. 2 and 3, the GIS device includes a fast grounding switch 11, a bus bar cylinder 12, a grounding current-guiding bar 13 and a grounding current-guiding bar fixing device, the fast grounding switch 11 has a grounding terminal for grounding a grounding static contact of the fast grounding switch 11; the bus barrel 12 is connected with the shell of the quick grounding switch 11 and is used for arranging a bus; the grounding diversion row 13 is connected to the grounding terminal, arranged in a Z shape, and used for realizing grounding diversion. The structures of the fast grounding switch 11, the bus-bar cylinder 12 and the grounding guide bar 13 are the same as those of the prior art, and are not described herein again.

Referring to fig. 2, the grounding diversion row fixing device adopts a hoop structure, and includes a first metal hoop body 21 and a second metal hoop body 23. The first metal hoop body 21 and the second metal hoop body 23 are both in a semicircular strip structure, the opening of the first metal hoop body 21 faces to the right, the opening of the second metal hoop body 23 faces to the left, the openings are respectively used for buckling the two radial sides of the bus tube body 12, and the first metal hoop body and the second metal hoop body jointly enclose to form a complete circular hoop body to be hooped and fixed on the bus tube body 12.

As shown in fig. 2 and 3, the first metal hoop body 21 has first connecting flanges 22 at both ends thereof, the second metal hoop body 23 has second connecting flanges 24 at both ends thereof, and the first connecting flange 22 and the second connecting flange 24 have bolt holes for the hoop body bolts 33 to pass through for tightening. The first metal hoop body 21 and the second metal hoop body 23 are arranged between the bus tube body 12 in a padding mode, rubber plates are arranged between the first metal hoop body 21 and the second metal hoop body 23 in a padding mode, a tube body insulation interlayer 31 is formed, the bus tube body 12 is insulated from the first metal hoop body 21 and the second metal hoop body 23, and meanwhile the surface of the bus tube body 12 can be prevented from being scratched by the first metal hoop body 21 and the second metal hoop body 23. An insulating barrier is arranged between the first connecting flange 22 and the second connecting flange 24, which insulating barrier forms a flange insulating barrier 32 for insulating the first connecting flange 22 from the second connecting flange 24. Meanwhile, the hoop body bolt 33 is passivated, so that an insulating layer is formed on the outer surface of the hoop body bolt 33 to form a bolt insulating interlayer for insulating the hoop body bolt 33 and the inner wall of the bolt through hole from each other. When in connection, the stainless steel washer and the stainless steel spring washer are sleeved on the hoop body bolt 33. The flange insulating spacer 32 and the bolt insulating spacer insulate the first ferrule body 21 and the second ferrule body 23 from each other, and prevent electromagnetic circulating currents from being formed between the first ferrule body 21 and the second ferrule body 23.

As shown in fig. 2, the top of the first ferrule body 21 is connected to a flow guide row supporting arm 41, the flow guide row supporting arm 41 is a U-shaped structure, and an opening of the U-shaped structure faces downward and is integrally bent from a plate with the first ferrule body 21. One end of the U-shaped structure is connected with the first metal hoop body 21, the other end of the U-shaped structure forms a guide bar connecting folding edge 42, a bolt hole is formed in the guide bar connecting folding edge 42, and the grounding guide bar 13 located on one side of the bus barrel 12 in the radial direction is fixedly connected through a guide bar bolt 43. The flow guide row bolt 43 is a hot galvanizing bolt, and a hot galvanizing washer and a hot galvanizing spring washer are arranged during connection. In order to prevent the guide row supporting arm 41 from deforming under the action of the grounded guide row 13, an inclined reinforcing rib plate 44 is arranged between a vertical part of one side of the guide row supporting arm 41 close to the first metal hoop body 21 and a horizontal part of the guide row supporting arm 41.

In order to ensure the structural strength of the first ferrule body 21, the second ferrule body 23 and the guide row supporting arm 41, the first ferrule body 21, the guide row supporting arm 41 and the second ferrule body 23 are all made of Q235B steel plate.

During assembly, before the first metal hoop body 21 and the second metal hoop body 23 are butted together, a rubber plate is arranged between the first metal hoop body 21 and the bus tube body 12, an insulating plate is arranged between the butting faces of the flanges of the first metal hoop body 21 and the second metal hoop body 23, the angle of the first metal hoop body 21 is adjusted, the first metal hoop body 21 is close to the grounding guide bar 13, and the first metal hoop body 21 and the second metal hoop body 23 are fastened together through hoop body bolts 33 which are subjected to passivation treatment, stainless steel washers, stainless steel spring washers, nuts and the like.

Then, a fixing clamp plate 45 is arranged on the side of the grounding guide bar 13 far away from the first metal hoop body 21, the grounding guide bar 13 is clamped between the first metal hoop body 21 and the fixing clamp plate 45, and then the first metal hoop body 21 and the fixing plate are fastened together by a hoop body bolt 33 such as a guide bar bolt 43, a nut, a spring washer and a washer which are subjected to hot galvanizing treatment so as to fix the grounding guide bar 13. The number of the first metal hoop bodies 21 and the second metal hoop bodies 23 can be determined according to the swing degree of the grounding guide row 13, and the fixed positions thereof can be arbitrarily moved along the axial direction of the bus-bar cylinder 12. The grounding diversion row fixing device is simple in assembly structure, convenient to install, low in cost, flexible in configuration and high in adaptability, the limitation of the length of the grounding diversion row 13 of the quick grounding switch 11 on the horizontal distance between the quick grounding switch 11 and a grounding point of a grounding grid is eliminated, and the stability of a large-span quick grounding switch 11 grounding system can be improved.

The utility model discloses embodiment 2 of well GIS equipment:

the present embodiment is different from embodiment 1 in that in embodiment 1, both ends of the first metal hoop body 21 and the second metal hoop body 23 are provided with connecting flanges and fixedly connected by the hoop body bolts 33, while in this embodiment, the first metal hoop body 21 is hinged to one end of the second metal hoop body 23, and the other end is fixedly connected by the hoop body bolts 33, and electromagnetic circulation between the first metal hoop body 21 and the second metal hoop body 23 can also be prevented by the flange insulating interlayer 32 and the bolt insulating interlayer.

The utility model discloses embodiment 3 of well GIS equipment:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the bolt insulating interlayer between the inner wall of the bolt through hole and the hoop bolt 33 is formed by passivating the outer surface of the hoop bolt 33, and in this embodiment, the bolt insulating interlayer is formed by an insulating sleeve sleeved on the hoop bolt 33.

The utility model discloses embodiment 4 of well GIS equipment:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the guide row support arm 41 is drawn out from the upper end of the first ferrule body 21 and extends toward the side opposite to the opening direction of the first ferrule body 21, whereas in the present embodiment, the guide row support arm is drawn out in the horizontal direction from the middle portion between both ends of the first ferrule body 21.

In the above embodiment, the guide row supporting arm 41 and the first ferrule body 21 are formed as a single body, and in other embodiments, the guide row supporting arm 41 and the first ferrule body 21 may be formed as two separate parts and fixedly connected together.

The utility model discloses well earthing switch equipment's ground connection water conservancy diversion is arranged fixing device's embodiment: the embodiment of the ground busbar fixing device of the ground switchgear, that is, the ground busbar fixing device described in any embodiment of the GIS equipment, is not specifically described herein.

The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.

Claims

1. A grounding diversion bar fixing device for grounding switchgear, characterized in that, comprising:

The first metal hoop body (21) is used to be fastened to the radial side of the busbar barrel (12), and is connected with a guide bar support arm (41), and the guide bar support arm (41) is used for positioning on the busbar The grounding diversion row (13) on the radial side of the cylinder body (12) is fixedly connected by means of diversion row bolts (43);

The second metal hoop body (23) is used to be fastened to the other radial side of the busbar barrel (12), and is used to form a complete circular hoop body with the first metal hoop body (21) for hoop fixing onto the busbar barrel (12);

A cylindrical insulating layer (31) is provided between the first metal ferrule body (21) and the second metal ferrule body (23) and the busbar cylinder body (12), so as to make the busbar cylinder body (12) and the busbar cylinder body (12) A metal ferrule body (21) and a second metal ferrule body (23) are insulated from each other;

At least one end of the first metal hoop body (21) is provided with a first connection flange (22), the corresponding end of the second metal hoop body (23) is provided with a second connection flange (24), and the first connection flange ( 22) and the second connecting flange (24) are fixedly connected by hoop bolts (33), and a flange insulating spacer (32) is provided between the first connecting flange (22) and the second connecting flange (24). , the flange insulating spacer (32) is used to insulate the first connecting flange (22) and the second connecting flange (24) from each other;

The first connecting flange (22) and the second connecting flange (24) are provided with bolt through holes for the hoop body bolts (33) to pass through, and the inner walls of the bolt through holes are connected to the hoop body bolts (33) There is a bolt insulating spacer between them; the bolt insulating spacer is used to insulate the hoop bolt (33) and the inner wall of the bolt perforation from each other;

The flange insulating spacer (32) and the bolt insulating spacer are used to form a break point between the first metal ferrule body (21) and the second metal ferrule body (23) to prevent electromagnetic formation between the two. circulation.

2 . The grounding diversion bar fixing device according to claim 1 , wherein the outer surface of the hoop bolt ( 33 ) is provided with an insulating layer to form the bolt insulating spacer. 3 .

3 . The grounding diversion bar fixing device according to claim 2 , wherein the insulating layer on the outer surface of the hoop bolt ( 33 ) is formed by passivation treatment. 4 .

4. The grounding diversion bar fixing device according to claim 1, 2 or 3, characterized in that an insulating partition is provided between the first connecting flange (22) and the second connecting flange (24), so The flange insulating spacer (32) is formed by the insulating spacer.

5. The grounding diversion bar fixing device according to claim 1, 2 or 3, wherein the diversion bar supporting arm (41) is a U-shaped structure with an opening facing down, and the first metal hoop body (41) is a U-shaped structure with an opening facing downward. 21) The sheet is integrally bent and formed; one end of the guide bar support arm (41) is connected to the first metal hoop body (21), and the other end forms a guide bar connection flange (42) for fixing the grounding guide bar connect.

6 . The grounding diverter bar fixing device according to claim 5 , wherein the diverter bar bolts ( 43 ) are hot-dip galvanized bolts. 7 .

7. The grounding guide bar fixing device according to claim 5, characterized in that, between at least one vertical part of the guide bar support arm (41) and a horizontal part of the guide bar support arm (41) An inclined stiffening rib plate (44) is provided.

8. The grounding diverter bar fixing device according to claim 1, 2 or 3, characterized in that the grounding diverter bar fixing device further comprises a fixing splint (45), and the fixing splint (45) is used to pass the diverter bar bolts (43) Press the grounding diverter bar (13) onto the diverter bar support arm (41).

9 . The grounding diversion bar fixing device according to claim 1 , 2 or 3 , characterized in that, the cylindrical insulating spacer ( 31 ) is formed of a rubber sheet. 10 .

10. GIS equipment, including:

Grounding switchgear with grounding terminals for grounding the grounding static contacts of the grounding switchgear;

The busbar barrel (12) is connected with the housing of the grounding switch and is used for setting the busbar;

The grounding diversion bar (13), connected to the grounding terminal, is used for grounding diversion;

It is characterized in that it also includes:

A grounding guide bar fixing device, the grounding guide bar fixing device is the grounding guide bar fixing device according to any one of claims 1 to 9.