CN214226803U

CN214226803U - Knife switch type isolating switch

Info

Publication number: CN214226803U
Application number: CN202023332280.6U
Authority: CN
Inventors: 王乐友; 许广明; 罗进响; 廖培泽
Original assignee: ZHUHAI COMKING ELECTRIC CO Ltd
Current assignee: ZHUHAI COMKING ELECTRIC CO Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-17
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a disconnecting link type isolating switch, which comprises an isolating frame, a plurality of supporting insulators, a plurality of static contacts, an isolating main shaft, a plurality of pairs of moving contacts and a plurality of grounding contacts; the first end of each supporting insulator is arranged on the first surface inside the isolation frame, and each static contact is arranged at the second end of the corresponding supporting insulator; the isolation main shaft is arranged in the isolation frame and is rotationally connected with two opposite sides in the isolation frame, a plurality of through holes are formed in the isolation main shaft, and a support frame with a hollow structure is correspondingly arranged outside each through hole; each pair of moving contacts penetrates through the corresponding through hole and the corresponding support frame; the ground contact is provided on a second face opposite to the first face within the insulating frame. According to the disconnecting link type isolating switch of the utility model, the operation is simple, and the reliability is higher; the whole disconnecting link type isolating switch has fewer parts, each part is provided with a fixed installation position in the isolating frame, the disconnecting link type isolating switch is easy to assemble, and the efficiency can be effectively improved.

Description

Knife switch type isolating switch

Technical Field

The utility model belongs to the technical field of electric power system power transmission and distribution equipment and specifically relates to a switch formula isolator is related to.

Background

The isolating switch is mainly applied to a switch cabinet, is specially used for the connection of an incoming line bus, isolation and grounding of a feed device, and has three functional positions: the disconnecting switch is switched on, namely a switching-on position is formed, so that the feeding device is connected with the bus to receive power; the isolating switch is isolated, namely an isolation position, so that the feed device is disconnected with the bus; the isolating switch is grounded, namely the grounding position is switched on, so that the grounding end is switched on and reliably grounded under the condition that the feed device has no load, and the installation of the load side of the feed device and the personal safety of workers are ensured.

The existing isolating switch has the disadvantages of complicated structure, large volume, more parts, time and labor waste during assembly and influence on production efficiency; in addition, when the existing isolating switch is switched on, switched off and grounded, the situation of unstable contact may exist, and personal safety accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a switch formula isolator, the reliability is higher, simple structure and easily equipment.

According to the utility model discloses switch formula isolator, include: an insulating frame; the first end of each supporting insulator is arranged on the first surface in the isolation frame; the fixed contacts are arranged at the second ends of the corresponding supporting insulators; the isolation main shaft is arranged in the isolation frame and is rotationally connected with two opposite sides in the isolation frame, a plurality of through holes are formed in the isolation main shaft, and a support frame with a hollow structure is correspondingly arranged outside each through hole; each pair of moving contacts penetrates through the corresponding through hole and the corresponding support frame, and the isolating main shaft can drive each pair of moving contacts to be in contact with or separated from the corresponding static contact when rotating; the isolating main shaft can drive each pair of moving contacts to be in contact with or separated from the corresponding grounding contact when rotating.

According to the utility model discloses switch formula isolator has following beneficial effect at least: the supporting insulator plays a role in fixing the static contact and ensuring the correct relative position of the static contact and the moving contact; the moving contact is arranged in the through hole of the isolation main shaft and on the support frame, and when the isolation main shaft rotates, the moving contact can be contacted with or separated from the static contact or the grounding contact, so that switching-on, switching-off or grounding is realized, the operation is simple, and the reliability is high; the whole disconnecting link type isolating switch has fewer parts, each part is provided with a fixed installation position in the isolating frame, the disconnecting link type isolating switch is easy to assemble, and the efficiency can be effectively improved.

According to the utility model discloses a some embodiments, the static contact includes integrated into one piece's first link and second link, the first face of first link set up in support insulator's second end, the second link set up in the second face of first link is kept away from towards support insulator's direction protrusion.

According to some embodiments of the utility model, still include the first blotter of a plurality of, every first blotter is worn to locate correspondingly the second link of static contact, every first blotter sets up in corresponding on the second face of the first link of static contact.

According to the utility model discloses a some embodiments, every the outside cover of moving contact is equipped with the voltage-sharing cover, the voltage-sharing cover with corresponding be provided with first elastic component between the moving contact, the one end of first elastic component with voltage-sharing cover looks butt, the other end of first elastic component with moving contact looks butt.

According to the utility model discloses a some embodiments, it is every right the moving contact with corresponding two the voltage-sharing cover is through a fix with screw, the screw is located partial cover between two moving contacts is equipped with the stop collar.

According to some embodiments of the present invention, the isolation main shaft is provided with a limiting step at a lower portion of each through hole, a second elastic member is provided between each moving contact and the corresponding limiting step, one end of each second elastic member abuts against a limiting cap provided at the limiting step, and the other end of each second elastic member abuts against the corresponding moving contact; a fulcrum conductive rod is arranged between two movable contacts in each pair of movable contacts, a fulcrum pin penetrates through the fulcrum conductive rod, the two movable contacts and the corresponding two second elastic parts, and one end of the fulcrum conductive rod extends out of the through hole.

According to some embodiments of the present invention, the ground contact includes an integrally formed first connecting portion and a second connecting portion, the first surface of the first connecting portion is disposed on the second surface of the isolation frame, and the second connecting portion is disposed on the second surface of the first connecting portion and protrudes toward the direction of the isolation main shaft.

According to some embodiments of the utility model, still include a plurality of second blotter, every the second blotter cover is located correspondingly ground contact's second connecting portion, the second blotter is with corresponding ground contact's first connecting portion and second connecting portion are perpendicular.

According to some embodiments of the present invention, further comprising: the grounding contacts are arranged on the corresponding first mounting plates, and the second mounting plates are fixedly connected with the second surface of the isolation frame; and the grounding copper bar is arranged between the static contact and the second mounting plate.

According to some embodiments of the present invention, further comprising: the positioning sleeve is arranged on the first side in the isolation frame and is rotationally connected with one end of the isolation main shaft; the positioning frame is arranged on a second side opposite to the first side in the isolation frame and is rotationally connected with the other end of the isolation main shaft; and the connecting shaft penetrates through the positioning frame and is fixedly connected with the other end of the isolation main shaft, and the connecting shaft is movably matched with the second side of the isolation frame.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a disconnecting link type disconnecting switch according to an embodiment of the present invention in a closing state;

fig. 2 is a schematic structural diagram of a disconnecting link type disconnecting switch according to an embodiment of the present invention in a disconnecting state;

fig. 3 is a schematic structural diagram of a disconnecting link type disconnecting switch according to an embodiment of the present invention in a grounded state;

fig. 4 is a cross-sectional view of the disconnecting link type disconnecting switch according to the embodiment of the present invention in a closing state;

fig. 5 is an enlarged schematic view of portion a shown in fig. 4;

fig. 6 is an enlarged schematic view of a portion B shown in fig. 4;

fig. 7 is a schematic structural view of the disconnecting link type disconnecting switch according to the embodiment of the present invention after the front welding plate of the isolation frame is removed;

reference numerals:

the isolation structure comprises an isolation frame 100, a support insulator 200, a static contact 300, a first connection end 310, a second connection end 320, an isolation spindle 400, a support frame 410, a moving contact 500, a voltage-sharing cover 510, a first elastic piece 520, a screw 530, a limit sleeve 540, a second elastic piece 550, a limit cap 560, a fulcrum conductive rod 570, a fulcrum pin 580, a ground contact 600, a first connection portion 610, a second connection portion 620, a first cushion pad 700, a second cushion pad 800, a mounting frame 900, a first mounting plate 910, a second mounting plate 920, a positioning sleeve 1100, a positioning frame 1200 and a connection shaft 1300.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1, the disconnecting link type disconnecting switch according to the embodiment of the present invention includes an isolation frame 100, a plurality of supporting insulators 200, a plurality of static contacts 300, an isolation main shaft 400, a plurality of pair moving contacts 500, and a plurality of ground contacts 600; wherein, a first end of each supporting insulator 200 is disposed on a first surface inside the isolation frame 100, and each stationary contact 300 is disposed at a second end of the corresponding supporting insulator 200; the isolation main shaft 400 is arranged in the isolation frame 100 and is rotatably connected with two opposite sides in the isolation frame 100, a plurality of through holes are formed in the isolation main shaft 400, and a support frame 410 with a hollow structure is correspondingly arranged outside each through hole; each pair of moving contacts 500 is arranged through the corresponding through hole and the supporting frame 410, so that each pair of moving contacts 500 can be contacted with or separated from the corresponding static contact 300 when the isolating main shaft 400 rotates; the ground contacts 600 are disposed on a second side opposite to the first side in the isolating frame 100, and the isolating main shaft 400 rotates to make each pair of the movable contacts 500 contact with or separate from the corresponding ground contact 600.

Specifically, referring to fig. 1, the isolation frame 100 of the present invention is formed by sequentially welding a front welding plate, a left welding plate, a rear welding plate and a right welding plate; the utility model comprises three supporting insulators 200, three fixed contacts 300, three pairs of moving contacts 500 and three grounding contacts 600, corresponding to three phases of the circuit; one end of each of the three supporting insulators 200 is disposed on the rear welding plate in the isolation frame 100 at an interval, the other end of each of the three supporting insulators 200 is provided with a fixed contact 300, and the supporting insulators 200 play a role in fixing the fixed contacts 300 and ensuring correct relative position relationship between the fixed contacts 300 and the movable contacts 500; the utility model discloses an isolation main shaft 400 adopts is that the modified nylon 66 material that has added hydrophobic material, flame retardant material, toughening material, isolation main shaft 400 is the insulating part of the thin-walled structure who processes out with special mould, this material and structural insulation can be good, when the product receives the humid environment influence, can not lead to insulating properties to descend, and intensity is high, and can reach V0 level flame retardant property, still be provided with the rib on the thin-walled structure of isolation main shaft 400, be used for increasing alternate and relatively ground creepage distance, in order to strengthen insulating properties; the two ends of the isolation main shaft 400 are rotatably connected with the left side and the right side of the isolation frame 100, three through holes are formed in the isolation main shaft 400, three support frames 410 are correspondingly arranged outside the three through holes, the support frames 410 and the isolation main shaft 400 are integrally formed, and the three through holes and the three support frames 410 are used for installing three pairs of moving contacts 500; and three ground contacts 600 are disposed on the front solder plate within the insulating frame 100. Referring to fig. 1 to 3, it can be seen that when the isolation main shaft 400 rotates, the movable contact 500 may contact with the fixed contact 300 to implement closing; as shown in fig. 2, when the movable contact 500 is separated from the fixed contact 300 and the grounding contact 600, the opening is realized; as shown in fig. 3, when the movable contact 500 is in contact with the grounding contact 600, a grounding effect is achieved. According to the utility model, the structure is simple, the operation is convenient, the insulating property is good, and the reliability is high; the parts that whole switch formula isolator involved are less, and every part has fixed installation position in isolation frame 100, easily assembles, can effectively raise the efficiency.

It is understood that the specific number of the supporting insulator 200, the fixed contact 300, the movable contact 500, the ground contact 600 and the supporting frame 410 is not limited, and may be two, four, etc., without being limited thereto.

As shown in fig. 2, in the present invention, the static contact 300 includes a first connecting end 310 and a second connecting end 320 which are integrally formed, the first surface of the first connecting end 310 is disposed at the second end of the supporting insulator 200, and the second connecting end 320 is disposed on the second surface of the first connecting end 310 and protrudes toward the direction away from the supporting insulator 200. Specifically, as shown in fig. 2, the first connection end 310 of the static contact 300 may be L-shaped, a longitudinal portion of the first connection end 310 is disposed on the support insulator 200, and a transverse portion of the first connection end 310 is provided with a mounting hole, so as to facilitate mounting of the static contact 300 and the busbar copper bar; the arrangement of the second connection end 320 disposed on the longitudinal portion of the first connection end 310 and protruding forward facilitates the two movable contacts 500 to clamp the stationary contact 300, so that the contact between each pair of movable contacts 500 and each stationary contact 300 is more stable, reliable and safer.

As shown in fig. 2, the present invention further includes a plurality of first buffers 700, each first buffer 700 is disposed through the second connection end 320 of the corresponding static contact 300, and each first buffer 700 is disposed on the second surface of the first connection end 310 of the corresponding static contact 300. Through the arrangement of the first cushion pad 700, the impact force generated when the movable contact 500 and the static contact 300 are in mutual contact can be effectively buffered, and the phenomenon that the movable contact 500 and the static contact 300 are damaged due to the fact that the isolating main shaft 400 rotates with large force is avoided, and further the switch fails.

As shown in fig. 1, 4 and 5, an external housing of each movable contact 500 is provided with a voltage-sharing housing 510, a first elastic element 520 is disposed between the voltage-sharing housing 510 and the corresponding movable contact 500, one end of the first elastic element 520 abuts against the voltage-sharing housing 510, and the other end of the first elastic element 520 abuts against the movable contact 500. The voltage-equalizing cover 510 plays a role in equalizing voltage and shielding an electric field, and shields the tip part of the moving contact 500, so that the field intensity of the moving contact 500 is well and uniformly processed, and the insulation performance of the moving contact 500 between phases and relative ground is improved; the first elastic element 520 exerts a force on the movable contact 500, so that the two movable contacts 500 are more stably and reliably contacted with the fixed contact 300 and the ground contact 600. The first elastic member 520 may be a spring or the like.

As shown in fig. 5, each pair of movable contacts 500 is fixed with two corresponding voltage-sharing covers 510 by a screw 530, and a part of the screw 530 located between the two movable contacts 500 is sleeved with a stop collar 540. Through setting up stop collar 540, can be so that every two moving contacts 500 can keep a fixed distance when the installation, be favorable to moving contact 500's installation and fixed, can promote the packaging efficiency.

As shown in fig. 1, 4 and 6, the isolation main shaft 400 is provided with a limit step at the lower part of each through hole, a second elastic element 550 is arranged between each movable contact 500 and the corresponding limit step, one end of each second elastic element 550 abuts against a limit cap 560 arranged at the limit step, and the other end of each second elastic element 550 abuts against the corresponding movable contact 500; a fulcrum conductor bar 570 is disposed between two movable contacts 500 in each pair of movable contacts 500, one end of the fulcrum conductor bar 570 extends out of the through hole, and a fulcrum pin 580 is disposed between the fulcrum conductor bar 570, the two movable contacts 500 and the two corresponding second elastic members 550. The second elastic member 550 may adopt a common structure such as a spring, the limit cap 560 may play a role in mounting and positioning the second elastic member 550, and the second elastic member 550 may play a role in applying force to the moving contact 500, so as to further improve the reliability of the two moving contacts 500 when contacting the static contact 300 and the ground contact 600; the fulcrum conductive rod 570 is used to connect to an in-out line bushing or a breaker switch, and the fulcrum pin 580 is used to realize the hinge connection between the fulcrum conductive rod 570 and the movable contact 500, so as to form a fulcrum for the movable contact 500 to rotate relative to the fulcrum conductive rod 570. When the disconnecting link type isolating switch is connected with a copper bar in the switch cabinet, the fulcrum conducting bar 570 can be rotated to eliminate the machining error and the assembling error of parts, so that the whole assembly is convenient.

As shown in fig. 7, the ground contact 600 includes a first connection portion 610 and a second connection portion 620 that are integrally formed, wherein a first surface of the first connection portion 610 is disposed on a second surface of the isolation frame 100, and the second connection portion 620 is disposed on the second surface of the first connection portion 610 and protrudes toward the isolation spindle 400. Specifically, the first surface of the first connecting portion 610 is disposed at the front welding plate of the isolation frame 100, and the second connecting portion 620 is perpendicular to the first connecting portion 610 and protrudes backward, so that the two movable contacts 500 are in contact with the ground contacts 600, and the contact between each pair of movable contacts 500 and each ground contact 600 is more stable and reliable and safer.

As shown in fig. 7, the utility model discloses in, still include a plurality of second blotter 800, every second blotter 800 is located the second connecting portion 620 of corresponding ground contact 600, and second blotter 800 is perpendicular mutually with the first connecting portion 610 and the second connecting portion 620 of corresponding ground contact 600. Through setting up second blotter 800, impact force when can effectively cushion moving contact 500 and ground contact 600 and contact each other avoids because the strength when keeping apart main shaft 400 and rotating is great, and leads to moving contact 500 and ground contact 600 to receive the harm, and then leads to the ground connection to become invalid.

As shown in fig. 7, the utility model discloses in, still include a plurality of mounting bracket 900 and ground copper bar, every mounting bracket 900 includes integrated into one piece's first mounting panel 910 and second mounting panel 920, ground contact 600 sets up on corresponding first mounting panel 910, second mounting panel 920 and the second face fixed connection in the isolation frame 100, ground copper bar (not shown in the figure) sets up between static contact 300 and second mounting panel 920. Specifically, be provided with mounting hole 920 on the second mounting panel 920, be convenient for realize that mounting bracket 900 fixes on the preceding welded plate of isolation frame 100, and the ground connection copper bar then sets up the space department between first connecting portion 610 and second mounting panel 920, and ground contact 600 is connected with ground connection copper bar conduction, makes the utility model discloses a switch formula isolator couples together with switchgear's main ground system, realizes the ground connection effect.

As shown in fig. 4 and 7, the present invention further includes a positioning sleeve 1100, a positioning frame 1200 and a connecting shaft 1300; the positioning sleeve 1100 is arranged on a first side in the isolation frame 100 and is rotatably connected with one end of the isolation main shaft 400, the positioning frame 1200 is arranged on a second side opposite to the first side in the isolation frame 100, and the positioning frame 1200 is rotatably connected with the other end of the isolation main shaft 400; the connecting shaft 1300 is inserted into the positioning frame 1200 and is fixedly connected to the other end of the isolation main shaft 400, and the connecting shaft 1300 is movably engaged with the second side of the isolation frame 100. Specifically, the positioning sleeve 1100 is a welding sleeve and is arranged at the left welding plate of the isolation frame 100, the positioning frame 1200 is in a U shape and is arranged at the right welding plate of the isolation frame 100, and the positioning sleeve 1100 and the positioning frame 1200 are integrated with the isolation frame 100, so that the positioning and installation of the isolation main shaft 400 are facilitated, and the assembly efficiency can be effectively improved; the connecting shaft 1300 is fixedly connected with the right end of the isolation main shaft 400 and is movably matched with the right welding plate of the isolation frame 100, the connecting shaft 1300 is used for being connected with an external operating mechanism, and the connecting shaft 1300 can be driven to rotate by the external operating mechanism so as to drive the isolation main shaft 400 to rotate, so that the switching-on, switching-off and grounding states are switched.

According to the utility model discloses a disconnecting link type disconnecting switch, in the actual assembly, adopt the fix with screw at the preceding welded plate department of isolation frame 100 with ground contact 600, second blotter 800, ground connection copper bar and mounting bracket 900, fix with screw at the back welded plate department of isolation frame 100 with support insulator 200, fix with screw on support insulator 200 with static contact 300 and first blotter 700 again; assembling the fulcrum pin 580, the second elastic member 550, the limiting cap 560, the fulcrum conducting rod 570 and the movable contact 500 together, installing the fulcrum pin 580, the second elastic member 550, the limiting cap 560, the fulcrum conducting rod 570 and the movable contact 500 into the through hole of the isolation spindle 400 from bottom to top, pressing the limiting cap 560 by using a tool plate, then pushing the fulcrum conducting rod 570 with the movable contact 500 onto a limiting step in the through hole, and then installing the limiting sleeve 540 on the upper part, the pressure equalizing cover 510 and the contact spring of the first elastic member 520 on the movable contact 500 by using the screw 530; then, the isolation main shaft 400 is fixed at the position of the positioning sleeve 1100 and the positioning frame 1200, the connecting shaft 1300 penetrates through the positioning frame 1200 to be connected with the isolation main shaft 400, and the connecting shaft 1300 is connected with the isolation frame 100 in a movable fit manner, so that the assembly of the whole disconnecting link type isolation switch can be completed. The whole assembly process is simple and efficient, each part is provided with a fixed mounting position, and the production efficiency of the product is effectively improved.

In the description herein, references to the description of the term "one embodiment," "a further embodiment," "some specific embodiments," or "some examples," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A knife switch type isolating switch is characterized by comprising:

an insulating frame;

the first end of each supporting insulator is arranged on the first surface in the isolation frame;

the fixed contacts are arranged at the second ends of the corresponding supporting insulators;

the isolation main shaft is arranged in the isolation frame and is rotationally connected with two opposite sides in the isolation frame, a plurality of through holes are formed in the isolation main shaft, and a support frame with a hollow structure is correspondingly arranged outside each through hole;

each pair of moving contacts penetrates through the corresponding through hole and the corresponding support frame, and the isolating main shaft can drive each pair of moving contacts to be in contact with or separated from the corresponding static contact when rotating;

the isolating main shaft can drive each pair of moving contacts to be in contact with or separated from the corresponding grounding contact when rotating.

2. The disconnecting link type disconnecting switch according to claim 1, wherein the fixed contact includes a first connecting end and a second connecting end that are integrally formed, a first surface of the first connecting end is disposed at the second end of the supporting insulator, and the second connecting end is disposed at a second surface of the first connecting end and protrudes toward a direction away from the supporting insulator.

3. The disconnecting link type disconnecting switch according to claim 2, further comprising a plurality of first buffering pads, each first buffering pad passing through the second connecting end of the corresponding stationary contact, and each first buffering pad being disposed on the second surface of the first connecting end of the corresponding stationary contact.

4. The disconnecting link type disconnecting switch according to claim 2, wherein an outer cover of each of the movable contacts is provided with a voltage-sharing cover, a first elastic member is disposed between the voltage-sharing cover and the corresponding movable contact, one end of the first elastic member abuts against the voltage-sharing cover, and the other end of the first elastic member abuts against the movable contact.

5. The disconnecting link type disconnecting switch according to claim 4, wherein each pair of the moving contacts and the corresponding two voltage-sharing covers are fixed by a screw, and a position-limiting sleeve is sleeved on a portion of the screw between the two moving contacts.

6. The disconnecting link type disconnecting switch according to claim 1, 4 or 5, wherein the isolating main shaft is provided with a limiting step at a lower portion of each through hole, a second elastic member is arranged between each moving contact and the corresponding limiting step, one end of each second elastic member abuts against a limiting cap arranged at the limiting step, and the other end of each second elastic member abuts against the corresponding moving contact; a fulcrum conductive rod is arranged between two movable contacts in each pair of movable contacts, a fulcrum pin penetrates through the fulcrum conductive rod, the two movable contacts and the corresponding two second elastic parts, and one end of the fulcrum conductive rod extends out of the through hole.

7. The disconnecting switch according to claim 1, wherein the ground contact includes a first connecting portion and a second connecting portion integrally formed, a first surface of the first connecting portion is disposed on the second surface of the isolation frame, and the second connecting portion is disposed on the second surface of the first connecting portion and protrudes toward the isolation spindle.

8. The disconnecting switch according to claim 7, further comprising a plurality of second buffer pads, each of the second buffer pads being disposed on the second connecting portion of the corresponding ground contact, the second buffer pads being perpendicular to the first and second connecting portions of the corresponding ground contact.

9. The knife-blade disconnector according to claim 1, further comprising:

the grounding contacts are arranged on the corresponding first mounting plates, and the second mounting plates are fixedly connected with the second surface of the isolation frame;

and the grounding copper bar is arranged between the static contact and the second mounting plate.

10. The knife-blade disconnector according to claim 1, further comprising:

the positioning sleeve is arranged on the first side in the isolation frame and is rotationally connected with one end of the isolation main shaft;

the positioning frame is arranged on a second side opposite to the first side in the isolation frame and is rotationally connected with the other end of the isolation main shaft;

and the connecting shaft penetrates through the positioning frame and is fixedly connected with the other end of the isolation main shaft, and the connecting shaft is movably matched with the second side of the isolation frame.