WO2022121361A1

WO2022121361A1 - Static contact of grounding switch, and straight-swing plug-in type grounding switch

Info

Publication number: WO2022121361A1
Application number: PCT/CN2021/113048
Authority: WO
Inventors: 孙玉洲; 李竞; 王巧红; 郭海涛; 李付永; 朱全胜; 柴影辉; 夏立国; 赵子龙; 师丽芳; 钟荣松; 罗飞熊; 赵文杰; 李宇鹏; 周姝; 尹婷
Original assignee: 平高集团有限公司; 河南平高电气股份有限公司; 国家电网有限公司; 国网河南省电力公司
Priority date: 2020-12-11
Filing date: 2021-08-17
Publication date: 2022-06-16
Also published as: CN112750647B; CN112750647A

Abstract

The present invention relates to a static contact of a grounding switch, and a straight-swing plug-in type grounding switch. The static contact of a grounding switch comprises: an upper cylinder part provided with static contact fingers therein; and a lower guide housing fixed at the lower end of the upper cylinder part, wherein one end of a guide channel is an open end, and the other end thereof is a closed end; and an elastic buffering member is arranged on the closed end in a protruding manner, and the elastic buffering member is arranged towards the guide channel, and is used for being in elastic press-fit with a moving contact that swings into the guide channel, thereby buffering and decelerating the moving contact. When the moving contact swings into the guide channel and moves to the end of the guide channel, the moving contact can be in elastic press-fit with the elastic buffering member, the elastic buffering member buffers and decelerates the moving contact, and stops same, and then, the moving contact can readily move upwards in a linear manner and be plugged in the upper cylinder part, so as to be conductively connected to the static contact fingers provided in the upper cylinder part. The elastic buffering member facing the guide channel is used for buffering the moving contact, and an elastic buffering member with a proper elastic coefficient can be easily selected and can also be easily mounted.

Description

A grounding switch static contact and a direct-swing plug-in grounding switch

technical field

The invention belongs to the technical field of grounding switches, and in particular relates to a static contact of a grounding switch and a direct plug-in grounding switch.

Background technique

The high-voltage AC grounding switch is a common switchgear in the power system. It is mainly used for the reliable grounding of electrical equipment such as high-voltage busbars and isolating switches to be repaired. Safety. When the circuit is repaired, the grounding part can carry short-circuit current under abnormal conditions for a certain period of time, such as system short-circuit current.

At present, the grounding switch generally adopts the folding arm type or the direct swing type. The advantages of the direct swing type grounding switch structure are that the structure is simple and the failure rate is small. The collision is more severe when the contacts are in contact. There is a direct-swivel plug-in structure in the direct-swing grounding switch structure. The grounding conductive rod first rotates upward in the vertical plane, so that the moving contact on the grounding conductive rod is close to the static contact, and then moves up in a straight line. Insert the moving contact into the static contact to complete the closing action. This final direct-acting insertion method can effectively reduce the impact force during closing, the action is more stable, and the contact between the dynamic and static contacts is better.

The above-mentioned direct-swivel plug-in structure has higher requirements on the static contact. The static contact structure, such as the static contact mechanism disclosed in the Chinese utility model patent with the authorization announcement number of CN211404313U, includes a guide cover, and the guide cover includes a cylindrical portion and a guide channel. The cylindrical contact finger is fixedly installed in the cylindrical part, and the moving contact is inserted directly into it. The guiding channel is located at the lower end of the cylindrical part, the guiding channel is V-shaped, and the end of the guiding channel is connected with the cylindrical part. When the rod swings along the guide channel to the end of the guide channel, it swings in place, corresponding to the upper and lower parts of the cylinder, and the grounding conductive rod moves upward in a straight line, which can be inserted and assembled with the grounding contact finger. In order to prevent the impact of the moving contact, a buffer device is arranged on the inner side wall of the guide channel. The buffer device includes a buffer sheet oppositely arranged on the inner walls of the two sides of the guide channel entrance. The buffer sheet is made of elastic material, and the head end of the buffer sheet passes through. The insulating spacer is fixed on the inner wall of the guide channel, and the tail end of the buffer sheet is opposite to form an outlet, and the outlet is smaller than the diameter of the moving contact rod. Provide a buffer brake to the moving contact, thereby reducing the speed of the moving contact and avoiding the rigid impact of the moving contact at the end of the guide channel.

However, the above-mentioned method of arranging the buffer sheet has a limited hindering effect on the movable contact, and it is not easy to design and manufacture. If the opening is large and the elastic force of the buffer sheet is small, the hindering effect provided is poor; and if the opening is small, When the elastic force of the buffer sheet is large, it is easy to cause scratches and wear on the moving contacts. In order to improve the electrical conductivity, a silver-plated layer is usually provided outside the moving contacts. After a period of use, the moving contacts are severely worn, and the replacement and maintenance costs are high. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a grounding switch static contact, to solve the technology in the prior art that the buffer sheets are arranged on the inner walls of both sides of the guide channel to buffer and brake the movable contact, which has limited hindering effect and is not easy to design and manufacture. question. At the same time, the present invention also provides a direct-swivel plug-in grounding switch using the above-mentioned static contact of the grounding switch.

In order to achieve the above purpose, the technical solution of the grounding switch static contact provided by the present invention is: a grounding switch static contact, comprising:

The upper cylinder part, extending in the up-down direction, is provided with a static contact finger, which is used for conductive mating with the moving contact of the grounding tool bar of the direct-swirling plug-in grounding switch;

The lower guide cover is fixed on the lower end of the upper cylinder part, and the lower guide cover has a guide channel extending radially along the upper cylinder part, one end of the guide channel is an open end for the moving contact of the grounding tool bar to swing into, and the other end is closed It is used to cooperate with the top pressure stop of the moving contact to limit the swing stroke of the grounding tool bar;

An elastic buffer member is protrudingly arranged on the closed end, and the elastic buffer member is arranged towards the guide channel for elastic pressing fit with the movable contact which swings into the guide channel, so as to buffer and decelerate the movable contact.

The beneficial effect is: in the static contact of the grounding switch provided by the present invention, an elastic buffer member is arranged at the closed end of the guide channel, the elastic buffer member is arranged towards the guide channel, and the movable contact swings into the guide channel and moves to the end of the guide channel When it is pressed, it will be elastically press-fitted with the elastic buffer member, and the movable contact will be buffered, decelerated and stopped by the elastic buffer member, which is convenient for the next step to be inserted into the upper cylinder in a straight line, so as to be electrically connected with the static contact guide provided inside. The movable contact is buffered by the elastic buffer member facing the guide channel, which is convenient to select the elastic buffer member with suitable elastic coefficient, and the installation is also convenient, and it is not easy to cause scratches and wear on the movable contact, which reduces the extra cost to the movable contact. Wear, to ensure the service life of the moving contact.

As a further improvement, the elastic buffer member is a rubber member.

The beneficial effects are as follows: the rubber parts are selected, the structure is simple, the manufacture is convenient, and the fixed installation is also convenient.

As a further improvement, the elastic buffer member is detachably and fixedly installed on the closed end of the guide channel.

The beneficial effects are: disassembly and replacement can be realized, which is convenient for maintenance and replacement.

As a further improvement, the elastic buffer member is detachably fixed and installed on the closed end of the guide channel by means of fastening bolts.

The beneficial effects are: the use of fastening bolts is convenient for disassembly, assembly and replacement.

As a further improvement, a mounting plate is fixedly assembled on the upper cylindrical portion, and the fastening bolts pass through the lower guide cover and are fastened and assembled with the mounting plate.

The beneficial effect is that the mounting plate is fixedly assembled with the upper cylinder part and the lower guide cover respectively, which can effectively improve the structural strength of the entire static contact.

As a further improvement, the mounting plate is an L-shaped structure, including a horizontal plate portion and a vertical plate portion, the horizontal plate portion and the top end of the upper cylinder portion are fixedly assembled, and the vertical plate portion and the fastening bolts fixed together.

The beneficial effects are: the mounting plate is designed into an L-shaped structure, which is convenient to be fixedly assembled with the upper cylinder part and the lower guide cover.

As a further improvement, a first locking nut is screwed on the fastening bolt, the first locking nut is located outside the lower guide cover, and the first locking nut fixes the fastening bolt and the lower guide cover together; A second locking nut is also screwed on the fastening bolt, and the second locking nut fixes the fastening bolt and the mounting plate together.

The beneficial effects are: different locking nuts are arranged, which facilitates the fixed assembly of the tightening bolts and the lower guide cover, and the fixed assembly of the tightening bolts and the mounting plate.

As a further improvement, a contact finger cylinder is fixed in the upper cylinder part, a plurality of separation slits are set on the contact finger cylinder to form a plurality of the static contact fingers, and the upper cylinder part is arranged below the contact finger cylinder There is a ring platform, the ring platform forms a center hole, and a guide sleeve is fixedly assembled at the upper end opening of the center hole.

The beneficial effect is that a guide sleeve is fixedly arranged in the upper cylinder part to guide and guide the movable contact to be inserted into the finger cylinder along a straight line.

As a further improvement, the guide sleeve is a self-lubricating sleeve.

The beneficial effects are: the self-lubricating sleeve can provide lubrication for the moving contact and reduce the scraping on the moving contact.

The technical scheme of the direct-swing plug-in grounding switch provided by the present invention is:

A direct-swing plug-in earthing switch, comprising:

Grounding tool holder, there is a moving contact on the grounding tool holder;

Static contacts, used for conductive mating with moving contacts;

The static contact includes:

The beneficial effect is that: in the static contact of the direct-swing plug-in earthing switch provided by the present invention, an elastic buffer member is arranged at the closed end of the guide channel, the elastic buffer member is arranged toward the guide channel, and the movable contact swings into the guide channel and has the advantages of: When it moves to the end of the guide channel, it will be elastically pressed against the elastic buffer member, and the elastic buffer member will buffer the movable contact to decelerate and stop, so as to facilitate the next step to be inserted into the upper cylinder in a straight line to guide the static contact provided inside. electrical connection. The movable contact is buffered by the elastic buffer member facing the guide channel, which is convenient to select the elastic buffer member with suitable elastic coefficient, and the installation is also convenient, and it is not easy to cause scratches and wear on the movable contact, which reduces the extra cost to the movable contact. Wear, to ensure the service life of the moving contact.

As a further improvement, the elastic buffer member is a rubber member.

As a further improvement, the guide sleeve is a self-lubricating sleeve.

Description of drawings

FIG. 1 is a schematic structural diagram of a straight-through plug-in grounding switch provided by the present invention;

Fig. 2 is the structural schematic diagram of the static contact in Fig. 1;

FIG. 3 is a partial cross-sectional view of the static contact shown in FIG. 2 .

Description of reference numbers:

1. Grounding blade; 2. Static contact; 3. Support insulator; 4. Base assembly; 5. Upper cylinder; 6. Operating mechanism; 7. Mounting plate; 71. Horizontal plate; 72. Vertical plate ;8, contact finger seat; 9, static contact finger; 10, spring; 11, lower guide cover; 12, elastic buffer; 13, fastening bolt; 131, first lock nut; 132, second lock nut ; 14, steps; 15, guide sleeve; 16, finger tube; 17, ring platform.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided 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 embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a..." does not exclude processes, methods, and methods that include said element.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "provided" that may appear should be understood in a broad sense. It is arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The present invention will be further described in detail below in conjunction with the embodiments.

The specific embodiment 1 of the direct-swing plug-in grounding switch provided by the present invention:

In the static contact 2 of the grounding switch provided by the present invention, an elastic buffer member 12 is provided at the closed end of the guide channel, the elastic buffer member 12 is arranged facing the guide channel, and the movable contact swings into the guide channel and moves to the guide channel At the end, it will elastically press fit with the elastic buffer member 12 to buffer and decelerate the movable contact and stop, so as to facilitate the next step to be inserted into the upper cylinder 5 along a straight line to conduct conductive connection with the finger cylinder 16 provided inside. Using the elastic buffer member 12 facing the guide channel to buffer the moving contact, it is convenient to select the elastic buffer member 12 with a suitable elastic coefficient, and the installation is also convenient, and it is not easy to cause scratches and wear on the moving contact, which reduces the impact on the moving contact. The extra wear of the head ensures the service life of the moving contact.

In this embodiment, the grounding switch is a direct plug-in grounding switch, and its structure is shown in FIG. 1 , including a base assembly 4 , a grounding knife rod 1 is movably assembled on the base assembly 4 , and the free end of the grounding knife rod 1 is provided with a moving contact , In addition, an operating mechanism 6 is also provided on the base assembly 4, which is used to drive the grounding cutter bar 1 to swing and move directly through the transmission mechanism to complete the straight-swirling plug-in assembly.

In fact, in the grounding switch, the transmission mechanism that realizes the direct insertion of the grounding knife rod 1 is the prior art. For details, please refer to the grounding knife assembly and its matching transmission mechanism disclosed in the Chinese utility model patent with the authorization bulletin number CN209912789U. It is not repeated here.

A supporting insulator 3 is fixedly assembled on the base assembly 4, and a static contact 2 is fixedly assembled on the supporting insulator 3. The static contact 2 is used for conductive insertion with the moving contact on the grounding blade 1. The structure of the static contact 2 is as follows: As shown in FIG. 2 and FIG. 3 , the upper cylinder part 5 and the lower guide cover 11 are integrally provided. The upper cylinder part 5 extends in the up-down direction. The upper cylinder part 5 is fixedly assembled by screws, the contact finger holder 8 is provided with a contact finger cylinder 16, and a plurality of separation slits are arranged on the contact finger cylinder 16 to form a plurality of stationary contact fingers 9, and the contact finger cylinder 16 is used for the grounding cutter bar 1. The movable contact is inserted, the movable contact is electrically connected with the stationary contact finger 9 , and the contact finger barrel 16 is fixedly assembled with the contact finger seat 8 by screws.

In order to enhance the contact strength, a spring 10 is sheathed on the outer ring of the contact finger barrel 16, and the lower part of each stationary contact finger 9 is respectively provided with an inner convex section, so as to form a ring groove on the outer peripheral surface of the contact finger barrel 16, for the spring 10 to be sheathed in the ring groove. Therefore, the inner surface of the inner convex section of each stationary contact finger 9 is used for conductive connection with the movable contact.

In this embodiment, a ring platform 17 is arranged below the finger barrel 16 in the upper cylinder portion 5 , the ring platform 17 forms a center hole, and a guide sleeve 15 is fixedly assembled at the upper end hole of the center hole, and the guide sleeve 15 is used for guiding The movable contact is inserted into the finger barrel 16 upward along a straight line. A sunken step 14 is set on the inner edge of the ring platform 17 to form a countersunk hole structure. A guide sleeve 15 is tightly fitted and fixed at the step 14 by gluing. The lower end of the guide sleeve 15 is provided with a tapered guide portion for guiding the moving The contacts are inserted straight up into the finger barrel 16 . To ensure effective guidance, the inner diameter of the guide sleeve 15 should be smaller than the inner diameter of the central hole of the ring platform 17 . In addition, in order to reduce the wear of the movable contact, the guide sleeve 15 is a self-lubricating sleeve, and the self-lubricating sleeve is processed and supported by a self-lubricating material, such as graphite and polytetrafluoroethylene, which has a certain lubricity.

In the present embodiment, since it is adapted to the straight-inserted grounding tool bar 1, the lower guide cover 11 is provided with a guide channel, and the guide channel is V-shaped as a whole, which is convenient for guiding the moving contact to swing into it. One end of the guide channel is an open end, and the other end is a closed end. The open end is for the moving contact of the grounding tool bar 1 to swing into. The space near the closed end of the guide channel is communicated with the inner cavity of the upper cylinder portion 5 for swinging to a closed end. The moving contact of the end enters the upper cylinder part 5 along a straight line. In order to reduce the swinging speed of the movable contact, an elastic buffer member 12 is fixed at the closed end, and the elastic buffer member 12 is a rubber member. Press fit to slow down the moving contact buffer.

The inner side wall of the lower guide cover 11 corresponding to the closed end is provided with a groove, and the rubber piece is embedded in the groove, and is fixedly installed on the lower guide cover 11 by the fastening bolt 13. Correspondingly, screw the fastening bolt 13. There is a first locking nut 131 , the first locking nut 131 is located outside the lower guide cover 11 , and the first locking nut 131 fixes the fastening bolt 13 and the lower guide cover 11 together.

Generally speaking, in order to prevent the fastening bolts 13 from affecting the movable contacts, the rubber parts are designed into a sleeve body structure, so that the bolt heads of the fastening bolts 13 are hidden in the inner cavity of the sleeve body.

Of course, in order to ensure normal elastic top pressure, the rubber piece will be arranged protruding from the closed end of the lower guide cover 11 .

In this embodiment, a mounting plate 7 is fixedly installed on the static contact 2 for fixing the static contact 2 on the supporting insulator 3 , and the mounting plate 7 is an L-shaped structure as a whole, including a horizontal plate portion 71 and a vertical plate 72 , the horizontal plate portion 71 and the top of the upper cylinder portion 5 are fixedly assembled, and the vertical plate portion 72 is fixedly assembled with the fastening bolts 13 , which fix the rubber piece on the lower guide cover 11 . In fact, two second locking nuts 132 are screwed on the fastening bolts 13, and the two second locking nuts 132 are located on both sides of the vertical plate portion 72, so as to fix the fastening bolts 13 and the mounting plate 7 on the Together. In this way, the lower guide cover 11 and the mounting plate 7 can be fastened together by the fastening bolts 13 , so that the self-strength of the entire static contact 2 can be effectively improved.

In fact, the horizontal plate portion 71 is fixedly assembled with the contact finger seat 8 by fixing bolts, and the horizontal plate portion 71 and the contact finger seat 8 are electrically connected. The busbar or the cable connection end is fixedly and electrically connected to the horizontal plate portion 71 to electrically connect the external lead and the contact finger base 8 .

It should be noted that, in order to optimize the external electric field, the edge of the lower guide cover 11 is further provided with an arc-shaped flanging structure.

In the direct plug-in earthing switch provided in this embodiment, when the operating mechanism 6 drives the earthing blade 1 to swing toward the static contact 2, the moving contact swings into the guide channel until it elastically presses against the elastic buffer 12. The grounding cutter bar 1 moves up in a straight line, and is inserted into the contact finger barrel 16 under the guidance of the guide sleeve 15, and is in conductive contact with the static contact finger 9 to complete the grounding switch closing operation. When the brake is opened, the moving contact can withdraw from the contact finger barrel 16 in a straight line, and then leave the lower guide cover 11 along the guide channel in the reverse direction.

Because the elastic buffer member is arranged on the closed end corresponding to the guide channel, it can directly elastically impact with the moving contact to achieve effective buffering and energy absorption, so that the speed of the moving contact can be quickly reduced. Moreover, the elastic buffer member provided at the closed end is only a positive impact of the movable contact, and no strong scratches will occur, so as to avoid excessive wear on the movable contact.

The specific embodiment 2 of the direct-swing plug-in grounding switch provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the elastic buffer member is a rubber member. In this embodiment, the elastic buffer member is a compression spring, the two coils of spring wire at the bottom of the compression spring are fixed on the closed end by a pressure plate, and the pressure plate is fixed on the closed end by a tightening screw.

The specific embodiment 3 of the direct-swing plug-in grounding switch provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the elastic buffer member is detachably fixed and installed in the groove by means of fastening bolts. In this embodiment, the rubber piece serving as the elastic buffering piece can also be inserted into the groove in a tight fit. At this time, since the impact force often received by the rubber piece will force it to be pressed into the groove, it is not easy for the rubber piece to be pressed into the groove. Accidental detachment occurred.

The specific embodiment 4 of the direct-swing plug-in grounding switch provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the elastic buffer member is detachably fixed and installed on the closed end of the guide channel. In this embodiment, the rubber piece serving as the elastic buffer piece can also be glued and fixed in the corresponding groove, and in this case, it is inconvenient to disassemble.

The specific embodiment 5 of the direct-swing plug-in grounding switch provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, the mounting plate is not only fixedly assembled with the upper cylinder part, but also fixedly assembled with the lower guide cover through fastening bolts. In this embodiment, the mounting plate is only fixedly assembled with the upper cylinder portion, and at this time, the rubber piece can be detachably fixed and mounted on the closed end of the guide channel by using a tightening screw.

The specific embodiment 6 of the direct-swing plug-in grounding switch provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, a guide sleeve is arranged under the finger cylinder of the upper cylinder part to guide the movable contact to be inserted into the finger cylinder, and the guide sleeve is a self-lubricating sleeve. In this embodiment, the structure of the upper cylinder portion and its internal components can also refer to the structure in the authorized publication number CN211404313U, as long as an elastic buffer room is provided at the closed end of the guide channel.

In the embodiment of the static contact of the grounding switch provided by the present invention, the structure of the static contact of the grounding switch in this embodiment is the same as the structure of the static contact in the above-mentioned embodiment 1 of the plug-in grounding switch, and will not be repeated here. .

Of course, in other embodiments, the structure of the static contact of the grounding switch can also adopt the structure of the static contact in any one of Embodiments 2 to 6 of the direct plug-in grounding switch, which will not be repeated here.

Finally, it should be noted that the above are only the 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, for those skilled in the art, the 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

A grounding switch static contact, comprising:

The upper cylinder portion (5) extends along the up-down direction, and is provided with a stationary contact finger (9) therein, which is used for conductive mating with the moving contact of the grounding blade (1) of the direct-swirling plug-in grounding switch;

The lower guide cover (11) is fixed on the lower end of the upper cylinder part (5), the lower guide cover (11) has a guide channel extending radially along the upper cylinder part (5), and one end of the guide channel is an open end for the grounding knife The movable contact of the rod (1) swings into, and the other end is a closed end, which is used for cooperating with the top pressing stop of the movable contact to limit the swing stroke of the grounding knife rod (1);

It is characterized in that an elastic buffer member (12) is protrudingly arranged on the closed end, and the elastic buffer member (12) is arranged towards the guide channel, and is used for elastic pressing fit with the moving contact which swings into the guide channel, so that the moving contact Head buffering slows down.
The static contact of the grounding switch according to claim 1, wherein the elastic buffer member (12) is a rubber member.
The static contact of the grounding switch according to claim 2, wherein the elastic buffer member (12) is detachably and fixedly installed on the closed end of the guide channel.
The static contact of the grounding switch according to claim 3, characterized in that, the elastic buffer member (12) is detachably fixed and installed on the closed end of the guide channel through a fastening bolt (13).
The grounding switch static contact according to claim 4, characterized in that a mounting plate (7) is fixedly assembled on the upper cylinder portion (5), and the fastening bolts (13) pass through the lower guide cover (11), and is fastened and assembled with the mounting plate (7).
The grounding switch static contact according to claim 5, wherein the mounting plate (7) is an L-shaped structure, comprising a horizontal plate portion (71) and a vertical plate portion (72), and the horizontal plate portion ( 71) and the top end of the upper cylinder part (5) are fixedly assembled, and the vertical plate part (72) and the fastening bolts (13) are fixedly assembled together.
The grounding switch static contact according to claim 6, characterized in that a first locking nut (131) is screwed on the fastening bolt (13), and the first locking nut (131) is located in the lower guide cover In addition to (11), the first locking nut (131) fixes the fastening bolt (13) and the lower guide cover (11) together; the fastening bolt (13) is also screwed with a second locking nut (132), the second locking nut (132) fixes the fastening bolt (13) and the mounting plate (7) together.
The static contact of the grounding switch according to any one of claims 1 to 7, characterized in that a finger cylinder (16) is fixed in the upper cylinder part (5), and a finger cylinder (16) is provided on the upper cylinder part (5). a plurality of separation slits to form a plurality of the stationary contact fingers (9), a ring platform (17) is arranged in the upper cylinder part (5) below the contact finger barrel (16), and the ring platform (17) forms a center A guide sleeve (15) is fixedly assembled at the upper end opening of the central hole, and the guide sleeve (15) is used to guide the movable contact to be inserted into the finger tube (16) upward along a straight line.
The static contact of the grounding switch according to claim 8, characterized in that, the guide sleeve (15) is a self-lubricating sleeve.
A direct-swing plug-in earthing switch, comprising:

The grounding tool holder (1) is provided with a moving contact on the grounding tool holder (1);

The static contact (2) is used for conductive mating with the moving contact;

It is characterized in that, the static contact (2) adopts the static contact of the grounding switch according to any one of claims 1 to 9.