CN112750647B - Grounding switch static contact and straight swing plug-in type grounding switch - Google Patents
Grounding switch static contact and straight swing plug-in type grounding switch Download PDFInfo
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- CN112750647B CN112750647B CN202011452446.XA CN202011452446A CN112750647B CN 112750647 B CN112750647 B CN 112750647B CN 202011452446 A CN202011452446 A CN 202011452446A CN 112750647 B CN112750647 B CN 112750647B
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- moving contact
- contact
- grounding switch
- guide channel
- elastic buffer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing switches
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Abstract
The utility model relates to a grounding switch static contact and a straight swing insertion type grounding switch, wherein the grounding switch static contact comprises: an upper cylinder part, in which a static contact finger is arranged; the lower guide cover is fixedly arranged at the lower end of the upper cylinder part, one end of the guide channel is an open end, and the other end of the guide channel is a closed end; the closed end is provided with an elastic buffer part in a protruding mode, the elastic buffer part faces the guide channel and is used for being elastically pressed and matched with the moving contact swinging into the guide channel, and the moving contact is buffered and decelerated. When the moving contact swings to enter the guide channel and moves to the end of the guide channel, the moving contact is elastically pressed and matched with the elastic buffer piece, the elastic buffer piece buffers, decelerates and stops the moving contact, and the moving contact is conveniently inserted into the upper cylinder part upwards along a straight line in the next step so as to be electrically connected with static contact guidance arranged inside. The movable contact is buffered by the elastic buffer piece facing the guide channel, so that the elastic buffer piece with a proper elastic coefficient is conveniently selected, and the installation is also convenient.
Description
Technical Field
The utility model belongs to the technical field of grounding switches, and particularly relates to a grounding switch fixed contact and a straight swing plug-in grounding switch.
Background
The high-voltage AC grounding switch belongs to a common switch device in the power system, and is mainly used for reliably grounding electrical equipment such as a high-voltage bus and a disconnecting switch to be overhauled, and replacing a portable grounding wire to reliably ground the high-voltage equipment and a circuit and protect personal and property safety. The grounding part is used for carrying short-circuit current under abnormal conditions, such as system short-circuit current, in a certain time.
At present, a grounding switch generally adopts a folding arm type or a straight swing type, wherein the straight swing type grounding switch has the advantages of simple structure and small failure rate, and the defects are that the moving contact is high in speed when the stroke is ended, and the collision is relatively severe when the moving contact and the fixed contact are contacted. In the straight-swinging type grounding switch structure, a straight-swinging type inserting structure is arranged, a grounding conducting rod firstly rotates upwards in a vertical plane, a moving contact on the grounding conducting rod is close to a fixed contact, then moves upwards in a straight line, and the moving contact is inserted into the fixed contact to complete a closing action. The final direct-acting insertion mode can effectively reduce impact force during closing, and the action is more stable, and the contact between the moving contact and the static contact is better.
The straight-swinging type structure has higher requirement on the static contact, the static contact structure such as the static contact mechanism disclosed in Chinese patent application publication No. CN211404313U comprises a guide cover, the guide cover comprises a cylinder part and a guide channel, a cylindrical contact finger is fixedly arranged in the cylinder part and is used for enabling a moving contact to directly enter, the guide channel is positioned at the lower end of the cylinder part, the guide channel is in a V shape, the end of the guide channel is communicated with the cylinder part, and when the straight-swinging type grounding conducting rod swings to the end of the guide channel along the conducting channel, the grounding conducting rod swings to the right position, corresponds to the cylinder part up and down, and can be assembled with the grounding contact finger in an inserting way. For preventing moving contact striking, set up buffer on the inside wall of direction passageway, this buffer is including setting up the buffer blade on the inner wall of direction passageway entry both sides relatively, the buffer blade adopts elastic material to make, the head end of buffer blade passes through insulating cushion to be fixed on the inner wall of direction passageway, the relative setting of tail end of buffer blade forms the export, the export is less than moving contact pole footpath, after the moving contact gets into the direction passageway, because the export is less than moving contact pole footpath, the buffer blade can provide buffering braking for the moving contact to reduce moving contact speed, avoid the moving contact to appear rigid striking at the direction passageway end.
However, the above method of providing the buffer sheet has limited blocking effect on the moving contact, and is not easy to design and manufacture, and if the opening is large and the elastic force of the buffer sheet is small, the blocking effect is poor; if the opening is smaller, the buffer sheet is easy to scrape and abrade when the elastic force of the buffer sheet is larger, and in order to improve the conductivity, a silver coating is usually arranged outside the moving contact, so that after a period of use, the moving contact is seriously abraded, and the replacement and maintenance costs are higher.
Disclosure of Invention
The utility model aims to provide a fixed contact of a grounding switch, which solves the technical problems that the buffer sheets are arranged on the inner walls of two sides of a guide channel in the prior art to have limited blocking effect on the buffer braking of a moving contact and are not easy to design and manufacture. Meanwhile, the utility model also provides a straight swing plug-in type grounding switch using the grounding switch static contact.
In order to achieve the above purpose, the technical scheme of the grounding switch static contact provided by the utility model is as follows: a grounding switch stationary contact, comprising:
an upper cylinder part extending along the up-down direction, wherein a static contact finger is arranged in the upper cylinder part and is used for conducting and inserting with a moving contact of a grounding cutter bar of a straight swing insertion type grounding switch;
the lower guide cover is fixedly arranged at the lower end of the upper cylinder part and is provided with a guide channel extending along the radial direction of the upper cylinder part, one end of the guide channel is an open end for the moving contact of the grounding cutter bar to swing in, and the other end of the guide channel is a closed end and is used for being matched with the pressing stop of the moving contact to limit the swinging stroke of the grounding cutter bar;
the elastic buffer piece is arranged at the closed end in a protruding mode, faces the guide channel and is used for being in elastic pressing fit with the moving contact swinging into the guide channel, so that the moving contact is buffered and decelerated.
The beneficial effects are that: in the grounding switch static contact provided by the utility model, the elastic buffer piece is arranged at the closed end of the guide channel, and is arranged towards the guide channel, and when the moving contact swings into the guide channel and moves to the end of the guide channel, the moving contact is elastically pressed and matched with the elastic buffer piece, and is buffered, decelerated and stopped by the elastic buffer piece, so that the moving contact is conveniently inserted into the upper cylinder part upwards along a straight line in the next step to be electrically connected with the static contact guide arranged inside. Utilize the elastic buffer piece towards guide way to cushion the moving contact, conveniently select the elastic buffer piece of suitable elasticity coefficient, it is also comparatively convenient to install, and is difficult to cause scraping wearing and tearing to the moving contact, has reduced the extra wear to the moving contact, guarantees the life of moving contact.
As a further improvement, the elastic buffer member is a rubber member.
The beneficial effects are that: the rubber piece is selected, the structure is simple, the manufacture is convenient, and the fixing and the installation are also convenient.
As a further improvement, the elastic buffer is detachably and fixedly arranged at the closed end of the guide channel.
The beneficial effects are that: can realize dismantling the change, be convenient for maintain the change.
As a further improvement, the elastic buffer is detachably and fixedly arranged at the closed end of the guide channel through a fastening bolt.
The beneficial effects are that: the fastening bolts are adopted to facilitate disassembly, assembly and replacement.
As a further improvement, a mounting plate is fixedly assembled on the upper cylinder part, and the fastening bolt penetrates through the lower guide cover and is fastened and assembled with the mounting plate.
The beneficial effects are that: the mounting plate is fixedly assembled with the upper cylinder part and the lower guide cover respectively, so that the self structural strength of the whole static contact can be effectively improved.
As a further improvement, the mounting plate is of an L-shaped structure, and includes a cross plate portion and a riser portion, the cross plate portion and the top end of the upper tube portion are fixedly assembled, and the riser portion and the fastening bolt are fixedly assembled together.
The beneficial effects are that: the mounting plate is designed into an L-shaped structure, so that the mounting plate is convenient to fixedly assemble 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 positioned outside the lower guide cover, and the fastening bolt and the lower guide cover are fixedly assembled together by the first locking nut; and the fastening bolt is further screwed with a second locking nut, and the fastening bolt and the mounting plate are fixedly assembled together by the second locking nut.
The beneficial effects are that: different lock nuts are arranged, so that the fixed assembly of the fastening bolt and the lower guide cover is conveniently realized, and the fixed assembly of the fastening bolt and the mounting plate is realized.
As a further improvement, a finger cylinder is fixedly arranged in the upper cylinder part, a plurality of separation slits are formed on the finger cylinder to form a plurality of static fingers, a ring table is arranged below the finger cylinder in the upper cylinder part, a central hole is formed by the ring table, a guide sleeve is fixedly assembled at the hole of the upper end of the central hole, and the guide sleeve is used for guiding a moving contact to be inserted into the finger cylinder upwards along a straight line.
The beneficial effects are that: a guide sleeve is fixedly arranged in the upper cylinder part so as to guide and guide the moving 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 that: the self-lubricating sleeve is adopted, so that lubrication can be provided for the moving contact, and scraping on the moving contact is reduced.
The technical scheme of the straight swing plug-in type grounding switch provided by the utility model is as follows:
a straight swing plug-in grounding switch comprising:
the grounding cutter bar is provided with a moving contact;
the fixed contact is used for conducting and inserting with the moving contact;
the stationary contact includes:
an upper cylinder part extending along the up-down direction, wherein a static contact finger is arranged in the upper cylinder part and is used for conducting and inserting with a moving contact of a grounding cutter bar of a straight swing insertion type grounding switch;
the lower guide cover is fixedly arranged at the lower end of the upper cylinder part and is provided with a guide channel extending along the radial direction of the upper cylinder part, one end of the guide channel is an open end for the moving contact of the grounding cutter bar to swing in, and the other end of the guide channel is a closed end and is used for being matched with the pressing stop of the moving contact to limit the swinging stroke of the grounding cutter bar;
the elastic buffer piece is arranged at the closed end in a protruding mode, faces the guide channel and is used for being in elastic pressing fit with the moving contact swinging into the guide channel, so that the moving contact is buffered and decelerated.
The beneficial effects are that: in the static contact of the straight swing type plug-in grounding switch, the elastic buffer piece is arranged at the closed end of the guide channel, is arranged towards the guide channel, and is elastically pressed and matched with the elastic buffer piece when the moving contact swings into the guide channel and moves to the end of the guide channel, and the elastic buffer piece buffers and decelerates and stops the moving contact, so that the moving contact is conveniently inserted into the upper cylinder part upwards along a straight line in the next step to be electrically connected with the static contact guide arranged inside. Utilize the elastic buffer piece towards guide way to cushion the moving contact, conveniently select the elastic buffer piece of suitable elasticity coefficient, it is also comparatively convenient to install, and is difficult to cause scraping wearing and tearing to the moving contact, has reduced the extra wear to the moving contact, guarantees the life of moving contact.
As a further improvement, the elastic buffer member is a rubber member.
The beneficial effects are that: the rubber piece is selected, the structure is simple, the manufacture is convenient, and the fixing and the installation are also convenient.
As a further improvement, the elastic buffer is detachably and fixedly arranged at the closed end of the guide channel.
The beneficial effects are that: can realize dismantling the change, be convenient for maintain the change.
As a further improvement, the elastic buffer is detachably and fixedly arranged at the closed end of the guide channel through a fastening bolt.
The beneficial effects are that: the fastening bolts are adopted to facilitate disassembly, assembly and replacement.
As a further improvement, a mounting plate is fixedly assembled on the upper cylinder part, and the fastening bolt penetrates through the lower guide cover and is fastened and assembled with the mounting plate.
The beneficial effects are that: the mounting plate is fixedly assembled with the upper cylinder part and the lower guide cover respectively, so that the self structural strength of the whole static contact can be effectively improved.
As a further improvement, the mounting plate is of an L-shaped structure, and includes a cross plate portion and a riser portion, the cross plate portion and the top end of the upper tube portion are fixedly assembled, and the riser portion and the fastening bolt are fixedly assembled together.
The beneficial effects are that: the mounting plate is designed into an L-shaped structure, so that the mounting plate is convenient to fixedly assemble 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 positioned outside the lower guide cover, and the fastening bolt and the lower guide cover are fixedly assembled together by the first locking nut; and the fastening bolt is further screwed with a second locking nut, and the fastening bolt and the mounting plate are fixedly assembled together by the second locking nut.
The beneficial effects are that: different lock nuts are arranged, so that the fixed assembly of the fastening bolt and the lower guide cover is conveniently realized, and the fixed assembly of the fastening bolt and the mounting plate is realized.
As a further improvement, a finger cylinder is fixedly arranged in the upper cylinder part, a plurality of separation slits are formed on the finger cylinder to form a plurality of static fingers, a ring table is arranged below the finger cylinder in the upper cylinder part, a central hole is formed by the ring table, a guide sleeve is fixedly assembled at the hole of the upper end of the central hole, and the guide sleeve is used for guiding a moving contact to be inserted into the finger cylinder upwards along a straight line.
The beneficial effects are that: a guide sleeve is fixedly arranged in the upper cylinder part so as to guide and guide the moving 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 that: the self-lubricating sleeve is adopted, so that lubrication can be provided for the moving contact, and scraping on the moving contact is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a straight swing plug-in grounding switch according to the present utility model;
FIG. 2 is a schematic view of the stationary contact of FIG. 1;
fig. 3 is a partial cross-sectional view of the stationary contact shown in fig. 2.
Reference numerals illustrate:
1. a grounding cutter bar; 2. a stationary contact; 3. a support insulator; 4. assembling a base; 5. an upper cylinder part; 6. an operating mechanism; 7. a mounting plate; 71. a cross plate portion; 72. a riser portion; 8. a contact finger seat; 9. a stationary contact finger; 10. a spring; 11. a lower guide cover; 12. an elastic buffer member; 13. a fastening bolt; 131. a first lock nut; 132. a second lock nut; 14. a step; 15. a guide sleeve; 16. a finger cylinder; 17. a ring table.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, are 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. Moreover, 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 one … …" is not intended to exclude processes, methods comprising such element.
In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
The present utility model is described in further detail below with reference to examples.
The embodiment 1 of the straight swing plug-in grounding switch provided by the utility model comprises the following components:
in the fixed contact 2 of the grounding switch provided by the utility model, the elastic buffer piece 12 is arranged at the closed end of the guide channel, the elastic buffer piece 12 is opposite to the guide channel, and when the moving contact swings into the guide channel and moves to the end of the guide channel, the moving contact is elastically pressed and matched with the elastic buffer piece 12, and the moving contact is buffered, decelerated and stopped, so that the moving contact is conveniently inserted into the upper cylinder part 5 upwards along a straight line in the next step so as to be electrically connected with the internally arranged contact finger cylinder 16. The elastic buffer piece 12 opposite to the guide channel is utilized to buffer the moving contact, so that the elastic buffer piece 12 with a proper elastic coefficient is conveniently selected, the installation is also more convenient, the scraping abrasion to the moving contact is not easy to occur, the additional abrasion to the moving contact is reduced, and the service life of the moving contact is ensured.
In this embodiment, the grounding switch is a straight swing type plug-in grounding switch, and its structure is shown in fig. 1, and the grounding switch comprises a base assembly 4, a grounding cutter bar 1 is movably assembled on the base, a moving contact is disposed at the free end of the grounding cutter bar 1, and an operating mechanism 6 is further disposed on the base assembly 4, and is used for driving the grounding cutter bar 1 to swing and move straight through a transmission mechanism, so as to complete straight swing type plug-in assembly.
In fact, in the grounding switch, the transmission structure for implementing the straight insertion of the grounding knife bar 1 is the prior art, and specifically, the grounding knife assembly and the matched transmission mechanism thereof disclosed in the chinese patent application publication No. CN209912789U can be referred to, and are not described herein.
The base assembly 4 is fixedly provided with a support insulator 3, the support insulator 3 is fixedly provided with a fixed contact 2, the fixed contact 2 is used for conducting and inserting with a moving contact on the grounding cutter bar 1, the structure of the fixed contact 2 is shown in fig. 2 and 3, the base assembly comprises an integrally arranged upper cylinder part 5 and a lower guide cover 11, the upper cylinder part 5 extends along the up-down direction, the top end of the upper cylinder part 5 is fixedly provided with a contact finger seat 8, the contact finger seat 8 is fixedly assembled with the upper cylinder part 5 through a screw, the contact finger seat 8 is provided with a contact finger cylinder 16, the contact finger cylinder 16 is provided with a plurality of separation gaps to form a plurality of fixed contact fingers 9, the contact finger cylinder 16 is used for inserting with the moving contact of the grounding cutter bar 1, the moving contact is in conducting connection with the fixed contact fingers 9, and the contact finger cylinder 16 is fixedly assembled with the contact finger seat 8 through the screw.
In order to enhance the contact strength, the outer collar of the finger cylinder 16 is sleeved with a spring 10, the lower part of each static finger 9 is respectively provided with an inner convex section so as to form a ring groove on the outer peripheral surface of the finger cylinder 16, the spring 10 is sleeved with the ring groove, and the inner side surface of the inner convex section of each static finger 9 is used for conducting connection with a moving contact.
In this embodiment, a ring table 17 is disposed below the finger cylinder 16 in the upper cylinder 5, the ring table 17 forms a central hole, and a guide sleeve 15 is fixedly mounted at the hole of the upper end of the central hole, and the guide sleeve 15 is used for guiding the moving contact to be inserted into the finger cylinder 16 upwards along a straight line. The inner edge of the annular table 17 is provided with a sunk step 14 to form a counter bore structure, a guide sleeve 15 is fixed at the step 14 in a tightly matched gluing manner, and the lower end of the guide sleeve 15 is provided with a conical guide part for guiding the moving contact to be inserted into the finger cylinder 16 upwards along a straight line. To ensure effective guiding, the inner diameter of the guide sleeve 15 is smaller than the inner diameter of the central hole of the ring table 17. In order to reduce the abrasion to the moving contact, the guide sleeve 15 is a self-lubricating sleeve which is formed by processing and supporting a self-lubricating material, such as graphite or polytetrafluoroethylene, and has a certain lubricity.
In this embodiment, since the guiding cover 11 is provided with a guiding channel adapted to the straight-swing insertion type grounding cutter bar 1, the guiding channel is V-shaped on the whole, which is convenient for guiding the moving contact to swing into. One end of the guide channel is an open end, the other end of the guide channel is a closed end, the open end is used for the moving contact of the grounding cutter bar 1 to swing into, and a space near the closed end of the guide channel is communicated with the inner cavity of the upper cylinder part 5 so that the moving contact swinging to the closed end can enter the upper cylinder part 5 along a straight line. In order to reduce the swinging speed of the moving contact, an elastic buffer piece 12 is fixedly arranged at the closed end, the elastic buffer piece 12 is specifically a rubber piece, and the elastic buffer piece 12 is arranged towards the guide channel in a right opposite direction so as to elastically push and match with the moving contact swinging into the guide channel, so that the moving contact is buffered and decelerated.
The inner side wall of the corresponding closed end of the lower guide cover 11 is provided with a groove, the rubber piece is embedded in the groove and is fixedly arranged on the lower guide cover 11 through the fastening bolt 13, correspondingly, a first locking nut 131 is screwed on the fastening bolt 13, the first locking nut 131 is positioned outside the lower guide cover 11, and the fastening bolt 13 and the lower guide cover 11 are fixedly assembled together by the first locking nut 131.
Generally, in order to avoid the fastening bolt 13 affecting the moving contact, the rubber member is designed into a sleeve structure, so that the bolt head of the fastening bolt 13 is hidden in the inner cavity of the sleeve.
Of course, to ensure proper elastic pressing, the rubber member may protrude from the closed end of the lower guide housing 11.
In this embodiment, the mounting plate 7 is fixedly mounted on the fixed contact 2, and is used for fixedly mounting the fixed contact 2 on the supporting insulator 3, the mounting plate 7 is integrally in an L-shaped structure, and includes a transverse plate portion 71 and a vertical plate portion 72, the top ends of the transverse plate portion 71 and the upper barrel portion 5 are fixedly assembled, the vertical plate portion 72 and the fastening bolt 13 are fixedly assembled together, and the fastening bolt 13 fixedly mounts the rubber member on the lower guide cover 11. In practice, two second lock nuts 132 are screwed on the fastening bolts 13, the two second lock nuts 132 being located on both sides of the riser portion 72 to fixedly assemble the fastening bolts 13 and the mounting plate 7 together. In this way, the lower guide cover 11 and the mounting plate 7 can be fastened and mounted together by the fastening bolts 13, so that the self strength of the whole fixed contact 2 can be effectively improved.
Actually, the transverse plate portion 71 is fixedly assembled with the finger pad 8 through a fixing bolt, the transverse plate portion 71 is electrically connected with the finger pad 8, and a screw mounting hole is further formed in the transverse plate portion 71 and used for fixedly and electrically connecting the busbar or the cable connection end with the transverse plate portion 71 through a screw so as to electrically connect the external lead wire with the finger pad 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 a circular arc-shaped flanging structure.
In the straight-swinging type grounding switch provided by the embodiment, when the grounding cutter bar 1 is driven by the operating mechanism 6 to swing towards the fixed contact 2, the moving contact swings into the guide channel until the moving contact is elastically pressed and matched with the elastic buffer piece 12, rotates in place, then the grounding cutter bar 1 moves upwards along a straight line, is inserted into the contact finger cylinder 16 under the guidance of the guide sleeve 15 and is in conductive contact with the fixed contact finger 9, and the grounding switch closing operation is completed. When the brake is opened, the moving contact exits the finger cylinder 16 along a straight line and then reversely leaves the lower guide cover 11 along the guide channel.
Because the elastic buffer piece is arranged at the closed end corresponding to the guide channel, the elastic buffer piece can directly elastically impact with the moving contact to realize effective buffering and energy absorption, thereby the speed of the moving contact can be rapidly reduced. Moreover, the elastic buffer piece arranged at the closed end only impacts the moving contact in the forward direction, so that strong scraping can not occur, and excessive abrasion to the moving contact is avoided.
Specific embodiment 2 of the straight swing plug-in grounding switch provided by the utility model:
the differences from example 1 are mainly that: in embodiment 1, the elastic buffer is a rubber member. In this embodiment, the elastic buffer member is a compression spring, two rings of spring wires at the bottom of the compression spring are fixed on the closed end through a compression plate, and the compression plate is fixedly installed on the closed end through a fastening screw.
Specific embodiment 3 of the straight swing plug-in grounding switch provided by the utility model:
the differences from example 1 are mainly that: in embodiment 1, the elastic buffer is detachably and fixedly mounted in the groove by using a fastening bolt. In this embodiment, the rubber member as the elastic buffer member may be tightly inserted into the groove, and at this time, the rubber member is not easy to accidentally drop out because the rubber member is often pressed into the groove by the impact force.
Specific embodiment 4 of the straight swing plug-in grounding switch provided by the utility model:
it differs from example 1 mainly in that; in embodiment 1, the elastic buffer is removably and fixedly mounted to the closed end of the guide channel. In this embodiment, the rubber member as the elastic buffer member may be fixed in the corresponding groove by gluing, and at this time, the disassembly is not convenient.
The embodiment 5 of the straight swing plug-in grounding switch provided by the utility model is as follows:
the differences from example 1 are mainly that: in embodiment 1, the mounting plate is fixedly assembled not only with the upper tube portion but also with the lower guide cover by fastening bolts. In this embodiment, the mounting plate is fixedly assembled with only the upper tube portion, and at this time, the rubber member may be detachably and fixedly mounted at the closed end of the guide passage by means of the fastening screw.
Specific embodiment 6 of the straight swing plug-in grounding switch provided by the utility model:
the differences from example 1 are mainly that: in embodiment 1, a guide sleeve is arranged below the finger cylinder of the upper cylinder part and used for guiding the moving contact to be inserted into the finger cylinder in a guiding way, and the guide sleeve is a self-lubricating sleeve. In this embodiment, the structure of the upper cylinder and its internal parts may be referred to the structure of CN211404313U, as long as an elastic buffer is provided at the closed end of the guide channel.
In the embodiment of the grounding switch fixed contact provided by the utility model, the structure of the grounding switch fixed contact in the embodiment is the same as that of the fixed contact in the straight-swinging insertion type grounding switch embodiment 1, and the description is omitted herein.
Of course, in other embodiments, the structure of the fixed contact of the grounding switch may also be the fixed contact structure in any of embodiments 2 to 6 of the straight-swing plug-in grounding switch, which is not described herein again.
It should be noted that the above description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. A grounding switch stationary contact, comprising:
an upper cylinder part (5) extending along the up-down direction, wherein a static contact finger (9) is arranged in the upper cylinder part and is used for conducting and inserting with a moving contact of a grounding cutter bar (1) of the straight swing type plug-in grounding switch;
the lower guide cover (11) is fixedly arranged at the lower end of the upper cylinder part (5), the lower guide cover (11) is provided with a guide channel extending along the radial direction of the upper cylinder part (5), one end of the guide channel is an open end for the moving contact of the grounding cutter bar (1) to swing in, and the other end of the guide channel is a closed end and is used for being matched with the pressing stop of the moving contact to limit the swinging travel of the grounding cutter bar (1);
the device is characterized in that an elastic buffer piece (12) is arranged at the closed end in a protruding mode, and the elastic buffer piece (12) is arranged towards the guide channel and is used for elastically pushing and matching with a moving contact swinging into the guide channel, so that the moving contact is buffered and decelerated;
the elastic buffer piece (12) is detachably and fixedly arranged at the closed end of the guide channel through a fastening bolt (13);
the upper cylinder part (5) is fixedly provided with a mounting plate (7), and the fastening bolt (13) penetrates out of the lower guide cover (11) and is fastened and assembled with the mounting plate (7);
the mounting plate (7) is of an L-shaped structure and comprises a transverse plate portion (71) and a vertical plate portion (72), the top end of the transverse plate portion (71) and the top end of the upper cylinder portion (5) are fixedly assembled and are electrically connected with the stationary contact finger (9), and the vertical plate portion (72) and the fastening bolt (13) are fixedly assembled together.
2. The grounding switch static contact according to claim 1, characterized in that the elastic buffer (12) is a rubber piece.
3. The grounding switch fixed contact according to claim 1 or 2, wherein the fastening bolt (13) is screwed with a first locking nut (131), the first locking nut (131) is located outside the lower guide cover (11), and the first locking nut (131) fixedly assembles the fastening bolt (13) and the lower guide cover (11); the second locking nut (132) is further screwed on the fastening bolt (13), and the fastening bolt (13) and the mounting plate (7) are fixedly assembled together through the second locking nut (132).
4. A stationary contact for a grounding switch according to any one of claims 1 to 3, characterized in that a finger cylinder (16) is fixedly arranged in the upper cylinder part (5), a plurality of separation slits are arranged on the finger cylinder (16) to form a plurality of stationary fingers (9), a ring table (17) is arranged below the finger cylinder (16) in the upper cylinder part (5), the ring table (17) forms a central hole, a guide sleeve (15) is fixedly arranged at the hole of the upper end of the central hole, and the guide sleeve (15) is used for guiding the moving contact to be inserted into the finger cylinder (16) upwards along a straight line.
5. The grounding switch static contact according to claim 4, characterized in that the guiding sleeve (15) is a self-lubricating sleeve.
6. A straight swing plug-in grounding switch comprising:
the grounding cutter bar (1) is provided with a moving contact;
the fixed contact (2) is used for conducting insertion with the moving contact;
characterized in that the stationary contact (2) is a stationary contact of a grounding switch according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452446.XA CN112750647B (en) | 2020-12-11 | 2020-12-11 | Grounding switch static contact and straight swing plug-in type grounding switch |
| PCT/CN2021/113048 WO2022121361A1 (en) | 2020-12-11 | 2021-08-17 | Static contact of grounding switch, and straight-swing plug-in type grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452446.XA CN112750647B (en) | 2020-12-11 | 2020-12-11 | Grounding switch static contact and straight swing plug-in type grounding switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112750647A CN112750647A (en) | 2021-05-04 |
| CN112750647B true CN112750647B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011452446.XA Active CN112750647B (en) | 2020-12-11 | 2020-12-11 | Grounding switch static contact and straight swing plug-in type grounding switch |
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| Country | Link |
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| CN (1) | CN112750647B (en) |
| WO (1) | WO2022121361A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112750647B (en) * | 2020-12-11 | 2023-09-01 | 平高集团有限公司 | Grounding switch static contact and straight swing plug-in type grounding switch |
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Also Published As
| Publication number | Publication date |
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| WO2022121361A1 (en) | 2022-06-16 |
| CN112750647A (en) | 2021-05-04 |
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