CN218826823U

CN218826823U - Vacuum load switch

Info

Publication number: CN218826823U
Application number: CN202223375853.2U
Authority: CN
Inventors: 苏载亮; 苏广; 谭海涛; 罗冬冬; 罗光碧
Original assignee: Zhejiang Yunkong Power Equipment Co ltd
Current assignee: Zhejiang Yunkong Power Equipment Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-04-07
Anticipated expiration: 2032-12-13

Abstract

The utility model provides a vacuum load switch, which belongs to the technical field of load switches, and comprises a frame, a first insulator and a second insulator, wherein one end of the first insulator is provided with an upper support, one end of the second insulator is provided with a lower support, a vacuum arc extinguish chamber is arranged between the upper support and the lower support, the frame is hinged with a grounding knife, the lower support is provided with a T-shaped grounding contact, the grounding contact comprises a horizontal part and a vertical part, a plurality of supporting elastic pieces are arranged between the horizontal part and the lower support, four corners of the grounding contact are provided with connecting bolts connected with the lower support, the supporting elastic pieces comprise an arc-shaped part and a connecting part, the connecting part is connected with the lower support, the upper end of the arc-shaped part is abutted to the lower end surface of the horizontal part, and a spring is sleeved on the connecting bolt; the utility model discloses can reduce the impact force that produces the undersetting when earthing knife closes a floodgate with ground contact, guarantee vacuum interrupter's stability, can also avoid earthing knife and ground contact to divide the floodgate for a long time to lead to ground contact not hard up simultaneously, guarantee ground mechanism's reliability.

Description

Vacuum load switch

Technical Field

The utility model relates to a load switch technical field, concretely relates to vacuum load switch.

Background

The load switch is a switching device between a circuit breaker and a disconnecting switch, and has a simple arc-extinguishing device, and can cut off rated load current and a certain overload current, but can not cut off short-circuit current. The load switch is convenient to use and reasonable in price, and is widely used in a distribution network system. The reliable performance of the load switch has important significance for guaranteeing the safe and reliable operation of the power grid.

In the prior art, as disclosed in chinese patent No. CN205282365U, a unit compartment cross-over type three-station vacuum load switch-fuse combined electrical apparatus is disclosed, which includes a vacuum arc-extinguishing chamber, an upper support, a lower support, a grounding knife and a grounding static contact, wherein the upper support and the lower support are respectively disposed at upper and lower ends of the vacuum arc-extinguishing chamber, in this structure, the grounding knife performs opening and closing operations with the grounding static contact during a swing process, but since the grounding static contact is directly fixed on the lower support, the grounding knife may cause a certain impact to the grounding static contact when closing with the grounding static contact, which may affect stability and breaking performance of the vacuum arc-extinguishing chamber.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a vacuum load switch.

The utility model discloses the technical scheme who takes as follows: the utility model provides a vacuum load switch, including the frame, horizontal level is provided with first insulator and second insulator about the frame, the one end that the frame was kept away from to first insulator is provided with the upper bracket, the one end that the frame was kept away from to the second insulator is provided with the undersetting, be provided with vacuum interrupter between upper bracket and the undersetting, the frame articulates in the below position that corresponds the undersetting has the earthing knife, be provided with the ground contact of T font on the undersetting, the ground contact includes horizontal portion and perpendicular portion, be provided with a plurality of support shell fragments between horizontal portion and the undersetting, its four corners is provided with connecting bolt and is connected with the undersetting, support the shell fragment including arc portion and the connecting portion that are located the arc portion both sides, connecting portion are connected with the undersetting, arc portion upper end butt is to horizontal portion terminal surface down, the cover is equipped with the spring on the connecting bolt, the spring both ends butt respectively to the head of horizontal portion and connecting bolt.

The vertical part is provided with a plurality of reinforcing ribs which are horizontally arranged.

Articulated on the upper bracket have the isolation rod, be provided with the fuse on the isolation rod, its end is provided with keeps apart the sword, the hinged end of isolation rod is connected with the isolation connecting rod, isolation connecting rod one end is connected in the frame.

An insulating push-pull rod is arranged above the first insulator, a pull rod is connected to the upper end of the vacuum arc extinguish chamber, a connecting lever is hinged to the upper support, one end of the connecting lever is connected with the insulating push-pull rod, and the other end of the connecting lever is connected with the pull rod.

An isolation pull rod is arranged above the insulation push-pull rod, one end of the isolation pull rod is connected with the rack, and the other end of the isolation pull rod is connected with the isolation rod.

The rack is provided with a third insulator above the isolation pull rod, the third insulator is arranged in an upward inclined mode relative to the first insulator, and an isolation contact and a conductive terminal are arranged at the tail end of the third insulator.

The vacuum interrupter interlocking device is characterized in that a three-station operation and interlocking mechanism is arranged on the rack, an operation panel is further arranged on the rack, an isolation grounding operation hole, an isolation grounding on-off indicator, a limiting pin, a vacuum interrupter on-off indicator, a manual opening button and a vacuum interrupter manual operation hole are formed in the operation panel, and an operation handle can be inserted into the isolation grounding operation hole and the vacuum interrupter manual operation hole to operate.

The vacuum arc extinguishing chamber is characterized in that fixed shells are arranged at the upper end and the lower end of the vacuum arc extinguishing chamber respectively, a connecting lug is arranged on each fixed shell, a through hole is formed in each connecting lug, a stand column is arranged at the position, corresponding to the through hole, of each upper support and each lower support, and an elastic piece is sleeved on each stand column.

The utility model has the advantages as follows: the utility model discloses in be provided with the support shell fragment between ground contact bottom and undersetting, to the impact force that the undersetting produced when can effectively reducing grounding knife and ground contact combined floodgate, guarantee vacuum interrupter's stability, the cover is equipped with the spring on connecting bolt simultaneously, can avoid grounding knife and the long-term divide-shut brake of ground contact to lead to the ground contact not hard up, guarantees ground mechanism's reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of a ground contact connection structure according to the present invention;

fig. 3 is an exploded view of the ground contact connection structure of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 1;

fig. 5 is a schematic view of an operation panel according to the present invention;

in the figure, 1-a rack, 101-a vacuum interrupter, 2-a first insulator, 3-a second insulator, 4-an upper support, 5-a lower support, 6-a grounding knife, 7-a grounding contact, 71-a transverse part, 72-a vertical part, 721-a reinforcing rib, 8-a supporting spring plate, 81-an arc part, 82-a connecting part, 9-a connecting bolt, 10-a spring, 11-an isolating rod, 12-a fuse, 13-an isolating knife, 14-an isolating connecting rod, 15-an insulating push-pull rod, 16-a pull rod, 17-a crank arm, 18-an isolating pull rod, 19-a third insulator, 20-an isolating contact, 21-a conductive terminal, 22-an operating panel, 221-an isolating grounding operating hole, 222-an isolating grounding switching indicator, 223-a limiting pin, 224-a vacuum interrupter switching indicator, 225-a manual switching button, 226-a vacuum interrupter manual operating hole, 23-a fixed shell, 24-a connecting lug, 25-a stand column and 26-an elastic piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

As shown in fig. 1 to 5, for the present invention provides an embodiment:

a vacuum load switch comprises a rack 1, wherein a first insulator 2 and a second insulator 3 are horizontally arranged on the rack 1 in an up-down transverse mode, an upper support 4 is arranged at one end, far away from the rack 1, of the first insulator 2, a lower support 5 is arranged at one end, far away from the rack 1, of the second insulator 3, a vacuum arc extinguish chamber 101 is arranged between the upper support 4 and the lower support 5, a grounding knife 6 is hinged to the rack 1 at a position below the lower support 5, a T-shaped grounding contact 7 is arranged on the lower support 5, the grounding contact 7 comprises a transverse portion 71 and a vertical portion 72, a plurality of supporting elastic pieces 8 are arranged between the transverse portion 71 and the lower support 5, connecting bolts 9 are arranged at four corners of the supporting elastic pieces 8 and connected with the lower support 5, each supporting elastic piece 8 comprises an arc portion 81 and a connecting portion 82 located on two sides of the arc portion 81, the connecting portion 82 is connected with the lower support 5, the upper end of the arc portion 81 is abutted to the lower end face of the transverse portion 71, the supporting elastic pieces 8 elastically support the transverse portion 71, the vacuum arc extinguish chamber 101 generated when the grounding knife 6 and the grounding contact 7 are effectively reduced, and the impact force on the lower support 4 is ensured, so as to ensure the stability of the vacuum arc extinguish chamber 101; the connecting bolt 9 is sleeved with the spring 10, two ends of the spring 10 are respectively abutted to the transverse part 71 and the head part of the connecting bolt 9, so that the grounding contact 7 and the lower support 5 are prevented from being connected and loosened due to long-term opening and closing of the grounding knife 6 and the grounding contact 7, and the reliability of the grounding mechanism is ensured.

Further, the vertical portion 72 is provided with a plurality of reinforcing ribs 721 horizontally, in this embodiment, the length of the vertical portion 72 is properly increased, the creepage distance can be increased by combining the upper reinforcing ribs 721, the reinforcing ribs 721 can be protrusions and recesses formed by stamping on the vertical portion 72, and the end of the vertical portion 72 is provided with a flat plate portion with a certain length to be matched with the grounding knife 6.

Specifically, an isolating rod 11 is hinged to the upper support 4, a fuse 12 is arranged on the isolating rod 11, an isolating knife 13 is arranged at the tail end of the isolating rod 11, an isolating connecting rod 14 is connected to the hinged end of the isolating rod 11, one end of the isolating connecting rod 14 is connected to the rack 1, and the structure can refer to the structure disclosed in the chinese patent with the publication number CN205282365U, so that the application range of the load switch is expanded.

Specifically, an insulating push-pull rod 15 is arranged above the first insulator 2, a pull rod 16 is connected to the upper end of the vacuum arc-extinguishing chamber 101, a connecting lever 17 is hinged to the upper support 4, one end of the connecting lever 17 is connected with the insulating push-pull rod 15, the other end of the connecting lever 17 is connected with the pull rod 16, and the insulating push-pull rod 15 is pushed and pulled to enable the connecting lever 17 to rotate to drive the pull rod 16 to move up and down so as to be disconnected and closed in the vacuum arc-extinguishing chamber 101.

Specifically, an isolation pull rod 18 is arranged above the insulation push-pull rod 15, the isolation pull rod 18 is an insulation isolation pull rod, so that the insulation performance is improved, one end of the isolation pull rod 18 is connected with the rack 1, the other end of the isolation pull rod is connected with the isolation rod 11, the isolation pull rod 18 can drive the isolation rod 11 to rotate through an operating mechanism on the rack 1, a third insulator 19 is arranged above the isolation pull rod 18 on the rack 1, the third insulator 19 is arranged in an upward inclined manner relative to the first insulator 2, so that the creeping distance of an electric arc can be increased, the safety of equipment is improved, an isolation contact 20 and a conductive terminal 21 are arranged at the tail end of the third insulator 19, and the isolation rod 11 rotates to enable the isolation knife 13 to rotate to form an electric connection position with the isolation contact 20.

Specifically, the rack 1 is provided with a three-station operation and interlocking mechanism, and is further provided with an operation panel 22, the operation panel is provided with an isolated grounding operation hole 221, an isolated grounding switch-on/off indicator 222, a limit pin 223, a vacuum arc-extinguishing chamber switch-on/off indicator 224, a manual switch-off button 225 and a vacuum arc-extinguishing chamber manual operation hole 226, the isolated grounding operation hole 221 and the vacuum arc-extinguishing chamber manual operation hole 226 can be inserted into an operation handle for operation, and the limit pin 223 needs to be pulled out before operation.

Further, both ends all are provided with fixed casing 23 about vacuum interrupter 101, and fixed casing 23 establishes above that with its cover of insulating casing adaptation of vacuum interrupter 101, be provided with connecting lug 24 on the fixed casing 23, be provided with the through-hole on the connecting lug 24, upper bracket 4 and lower carriage 5 correspond the through-hole position and are provided with stand 25, and the through-hole can be passed to stand 25, the cover is equipped with elastic component 26 on the stand 25, and elastic component 26 adopts cylindrical spring, can reduce the vibrations that equipment operation produced to vacuum interrupter 101's influence, promote the disconnected reliability of vacuum interrupter 101.

This isolator generally installs at the cubical switchboard internally, and the power transmission operation flow is: closing the cabinet door, then grounding, combining and isolating, and then combining the vacuum arc-extinguishing chamber; the power failure operation flow is as follows: the vacuum arc extinguish chamber is firstly separated, then the separation clutch is grounded, and then the cabinet door is opened.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, therefore, all equivalent variations of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides a vacuum load switch, includes frame (1), frame (1) is horizontal about the level be provided with first insulator (2) and second insulator (3), the one end that frame (1) was kept away from in first insulator (2) is provided with upper bracket (4), the one end that frame (1) was kept away from in second insulator (3) is provided with undersetting (5), be provided with vacuum interrupter (101) between upper bracket (4) and undersetting (5), frame (1) is articulated to have earthing knife (6) in the below position that corresponds undersetting (5), its characterized in that, be provided with ground contact (7) of T font on undersetting (5), ground contact (7) include horizontal portion (71) and perpendicular portion (72), be provided with a plurality of support shell fragments (8) between horizontal portion (71) and undersetting (5), its four corners is provided with connecting bolt (9) and is connected with undersetting (5), support shell fragment (8) are including arc portion (81) and connecting portion (82) that are located arc portion (81) both sides, connecting portion (82) and undersetting (82) are connected with arc portion (9), upper end face connection portion (10), upper end face (71) cover is equipped with lower support (9), two ends of the spring (10) are respectively abutted to the transverse part (71) and the head part of the connecting bolt (9).

2. Vacuum load switch according to claim 1, characterized in that the vertical portion (72) is provided with a plurality of ribs (721) arranged horizontally in the transverse direction.

3. A vacuum load switch according to claim 1, characterized in that the upper support (4) is hinged with a separation rod (11), the separation rod (11) is provided with a fuse (12), the tail end of the separation rod is provided with a separation knife (13), the hinged end of the separation rod (11) is connected with a separation connecting rod (14), and one end of the separation connecting rod (14) is connected with the frame (1).

4. A vacuum load switch according to claim 1, characterized in that an insulating push-pull rod (15) is arranged above the first insulator (2), a pull rod (16) is connected to the upper end of the vacuum interrupter (101), a connecting lever (17) is hinged to the upper support (4), one end of the connecting lever (17) is connected to the insulating push-pull rod (15), and the other end is connected to the pull rod (16).

5. A vacuum load switch according to claim 4, characterized in that an isolation pull rod (18) is arranged above the insulation push-pull rod (15), one end of the isolation pull rod (18) is connected with the frame (1), and the other end is connected with the isolation rod (11).

6. A vacuum load switch according to claim 5, characterized in that the frame (1) is provided with a third insulator (19) above the isolating rod (18), the third insulator (19) being arranged obliquely upwards in relation to the first insulator (2), the end of the third insulator (19) being provided with an isolating contact (20) and an electrically conducting terminal (21).

7. The vacuum load switch according to claim 1, wherein a three-position operation and interlocking mechanism is arranged on the rack (1), an operation panel (22) is further arranged on the rack, an isolation grounding operation hole (221), an isolation grounding switch-on/off indicator (222), a limit pin (223), a vacuum arc extinguish chamber switch-on/off indicator (224), a manual opening/closing button (225) and a vacuum arc extinguish chamber manual operation hole (226) are arranged on the operation panel, and an operation handle can be inserted into the isolation grounding operation hole (221) and the vacuum arc extinguish chamber manual operation hole (226) for operation.

8. The vacuum load switch according to claim 1, wherein the vacuum interrupter (101) is provided with a fixing housing (23) at both the upper and lower ends, the fixing housing (23) is provided with a connecting lug (24), the connecting lug (24) is provided with a through hole, the upper support (4) and the lower support (5) are provided with a column (25) corresponding to the through hole, and the column (25) is sleeved with an elastic member (26).