CN216487840U

CN216487840U - Outdoor high-voltage vacuum circuit breaker

Info

Publication number: CN216487840U
Application number: CN202123009857.4U
Authority: CN
Inventors: 苏杭; 郭灿
Original assignee: Junlang Electric Co ltd
Current assignee: Junlang Electric Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-10
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses an outdoor high-voltage vacuum circuit breaker, which comprises a mechanism box and three polar columns arranged on the upper part of the mechanism box; a vertical cavity is arranged in each pole, an upper conductive seat and a lower conductive seat are arranged in the vertical cavity, an insulating rubber sleeve is fixed between the upper conductive seat and the lower conductive seat, the periphery of the insulating rubber sleeve is tightly connected with the inner wall of the vertical cavity, a through hole for a conductive contact arm to pass through is formed in the center of the insulating rubber sleeve, a plurality of fan-shaped shielding sheets distributed along the circumferential direction are integrally formed on the insulating rubber sleeve at the through hole, the fan-shaped shielding sheets are spliced to seal the through hole in a normal state, and the upper end of the conductive contact arm is lower than the fan-shaped shielding sheets when the conductive contact arm moves to the lowest position; the utility model discloses a set up the insulating gum cover in the vertical cavity between the inherent conducting seat of going up and the lower conducting seat, increased creepage distance to effectively improve the safety in utilization, had fine result of use.

Description

Outdoor high-voltage vacuum circuit breaker

Technical Field

The utility model relates to an outdoor high-voltage vacuum circuit breaker belongs to vacuum circuit breaker structural design technical field.

Background

With the continuous improvement of the technical level of the vacuum circuit breaker, the vacuum circuit breaker is used as a switch device for controlling and distributing power, is more and more widely applied to a power system, and the use department also puts higher requirements on the vacuum circuit breaker. In the outdoor high-voltage vacuum circuit breaker with the built-in isolation mechanism in the prior art, because the internal space is limited, the isolation mechanism has the problems of small electric clearance and short creepage distance after being disconnected, and the use safety of the outdoor high-voltage vacuum circuit breaker is further reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims at providing an improve outdoor high-pressure vacuum circuit breaker of safety in utilization.

Realize the utility model discloses the technical scheme of purpose is:

an outdoor high-voltage vacuum circuit breaker comprises a mechanism box and three poles arranged at the upper part of the mechanism box; two vertical cavities which are relatively independent are arranged in each pole, a vacuum arc-extinguishing chamber and an isolation mechanism are respectively arranged in the two vertical cavities, a wire inlet end and a wire outlet end are arranged outside each pole, the isolation mechanism comprises an upper conductive seat and a lower conductive seat which are fixed in the vertical cavities at intervals up and down, and a conductive contact arm which can move up and down and is always connected with the lower conductive seat, one of the upper conductive seat and the lower conductive seat is connected with the wire inlet end, the other conductive seat is electrically connected with an upper static contact of the vacuum arc-extinguishing chamber through a conductive plate, a lower moving contact of the vacuum arc-extinguishing chamber is electrically connected with the wire outlet end, and the lower end of a moving contact of the vacuum arc-extinguishing chamber and the lower end of the conductive contact arm are both connected with an operating mechanism in the mechanism box through an insulating pull rod;

an insulating rubber sleeve is fixed between the upper conductive seat and the lower conductive seat in the vertical cavity, the periphery of the insulating rubber sleeve is tightly connected with the inner wall of the vertical cavity, a through hole for the conductive contact arm to pass through is formed in the center of the insulating rubber sleeve, a plurality of fan-shaped shielding sheets distributed along the circumferential direction are integrally formed at the through hole on the insulating rubber sleeve, the plurality of fan-shaped shielding sheets are spliced to seal the through hole in a normal state, and the upper end of the conductive contact arm is lower than the fan-shaped shielding sheets when the conductive contact arm moves to the lowest position.

In the above technical scheme, the wire inlet end is arranged at the top end of the pole and connected with the upper conductive seat, and the conductive plate is of a Z-shaped structure and connects the lower conductive seat with the fixed contact at the upper end of the vacuum arc extinguish chamber. .

In the above technical scheme, the insulating rubber sleeve is made of a silicon rubber material.

In the technical scheme, a rubber pad is compressed and arranged between the bottom end of the pole and the mechanism box, the rubber pad is provided with an annular folded part extending into the vertical cavity, and the inner edge of the annular folded part is tightly connected with the insulating pull rod.

In the above technical scheme, the insulating pull rod is provided with an annular clamping groove tightly sleeved with the inner edge of the annular corrugated part.

In the technical scheme, the insulating pull rod comprises an upper connecting rod and a lower insulating rod, and the lower end of the upper connecting rod is connected with the upper end of the lower insulating rod through an elastic connecting structure;

the elastic connection structure comprises a connection slot arranged at the upper end of the lower insulating rod, a stop table arranged at the lower end of the upper connecting rod and extending into the connection slot, a limit nut movably sleeved on the upper connecting rod and fixed at the upper end opening of the connection slot and a helical compression spring arranged in the connection slot, wherein the stop table is abutted and limited in the connection slot by the limit nut, and the upper end and the lower end of the helical compression spring are abutted to the bottom of the stop table and the bottom of the connection slot respectively.

In the technical scheme, the lower insulating rod is provided with the hollow parts and the annular bosses which are arranged at intervals along the axial direction.

In the technical scheme, the pole is fixed on the upper part of the mechanism box through a screw.

In the technical scheme, the vacuum arc-extinguishing chamber and the pole are cast into a whole;

and a silicon rubber layer is arranged on the outer wall of the pole, and a convex umbrella skirt is arranged on the surface of the silicon rubber layer.

The utility model discloses has positive effect: the utility model discloses an among the outdoor high pressure vacuum circuit breaker, through vertical cavity is inherent go up conductive seat with set up the insulating rubber sleeve down between the conductive seat to set up fan-shaped matte on the insulating rubber sleeve when electrically conductive contact arm removes to the extreme low position when isolator is in disconnected state promptly, fan-shaped matte amalgamation is electrically conductive to contact arm and last formation between the conductive seat and separate the fender, and has increased creepage distance through setting up of insulating rubber sleeve, thereby has effectively improved the safety in utilization, has fine result of use.

Drawings

Fig. 1 is a perspective view of an outdoor high voltage vacuum circuit breaker according to the present invention;

fig. 2 is a front view of the outdoor high voltage vacuum circuit breaker of the present invention;

FIG. 3 is a cross-sectional view taken along section line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a perspective view of the middle insulation rubber sleeve of the present invention;

FIG. 6 is a cross-sectional view of the insulation blanket of FIG. 5;

fig. 7 is a schematic structural view of the rubber cushion of the present invention.

The reference symbols shown in the figures are: 1-a mechanism box, 11-an operating mechanism, 2-a pole, 3-a vertical chamber, 4-a vacuum arc-extinguishing chamber, 5-an isolation mechanism, 51-an upper conductive seat, 52-a lower conductive seat, 53-a conductive contact arm, 54-an insulating pull rod, 541-an annular clamping groove, 542-an upper connecting rod, 543-a lower insulating rod, 544-a connecting slot, 545-a baffle table, 546-a limiting nut, 547-a helical compression spring, 548-an annular boss, 55-an insulating rubber sleeve, 56-a perforation, 57-a fan-shaped shielding sheet, 6-a wire inlet end, 7-a wire outlet end, 8-a silicon rubber layer, 81-an umbrella skirt, 9-a rubber pad, 91-an annular folded part and 10-a conductive plate.

Detailed Description

The following description is made in combination with the accompanying drawings for the specific structure of the outdoor high-voltage vacuum circuit breaker:

an outdoor high-voltage vacuum circuit breaker, as shown in fig. 1 to 6, comprises a mechanism box 1 and three poles 2 arranged at the upper part of the mechanism box 1; two vertical chambers 3 which are relatively independent are arranged inside each pole 2, a vacuum arc-extinguishing chamber 4 and an isolation mechanism 5 are respectively arranged in the two vertical chambers 3, a wire inlet end 6 and a wire outlet end 7 are arranged outside each pole 2, the isolating mechanism 5 comprises an upper conducting seat 51 and a lower conducting seat 52 which are fixed in the vertical chamber 3 at intervals up and down, and a conductive contact arm 53 which is movable up and down and is always connected to the lower conductive socket 52, one of the upper conductive seat 51 and the lower conductive seat 52 is connected to the incoming line terminal 6, the other is electrically connected to the upper end of the vacuum interrupter 4 through the conductive plate 10, the moving contact at the lower end of the vacuum interrupter 4 is electrically connected to the outgoing line terminal 7, the moving contact at the lower end of the vacuum arc-extinguishing chamber 4 and the lower end of the conductive contact arm 53 are both connected with the operating mechanism 11 in the mechanism box 1 through an insulating pull rod 54; an insulating rubber sleeve 55 is fixed between the upper conductive seat 51 and the lower conductive seat 52 in the vertical chamber 3, the periphery of the insulating rubber sleeve 55 is tightly connected with the inner wall of the vertical chamber 3, a through hole 56 for the conductive contact arm 53 to pass through is arranged in the center of the insulating rubber sleeve 55, a plurality of fan-shaped shielding sheets 57 distributed along the circumferential direction are integrally formed at the through hole 56 on the insulating rubber sleeve 55, the plurality of fan-shaped shielding sheets 57 are spliced to seal the through hole 56 in a normal state, and the upper end of the conductive contact arm 53 is lower than the fan-shaped shielding sheets 57 when moving to the lowest position. In the scheme of the embodiment, through the vertical chamber 3, the insulating rubber sleeve 55 is arranged between the upper conductive seat 51 and the lower conductive seat 52, and the fan-shaped shielding piece 57 is arranged on the insulating rubber sleeve 55, when the conductive contact arm 53 moves to the lowest position, namely, when the isolation mechanism is in a breaking state, the fan-shaped shielding piece 57 is spliced between the conductive contact arm 53 and the upper conductive seat 51 to form a separation barrier, and the creepage distance is increased through the arrangement of the insulating rubber sleeve 55, so that the use safety is effectively improved, and a good use effect is achieved. In this embodiment, the number of the fan-shaped shielding sheets 57 is four, in actual operation, the number of the fan-shaped shielding sheets 57 may be five or six, the fan-shaped shielding sheets 57 are bent upward and attached to the side surfaces of the conductive contact arms 53 when the conductive contact arms 53 move upward through the through holes 56, and the fan-shaped shielding sheets 57 are reset downward when the conductive contact arms 53 exit from the through holes 56 when moving downward.

In a further technical solution of this embodiment, as shown in fig. 3, the wire inlet end 6 is disposed at the top end of the pole 2 and connected to the upper conductive seat 51, the conductive plate 10 is of a Z-shaped structure, and the lower conductive seat 52 is connected to the upper stationary contact of the vacuum interrupter 4, so that the lower conductive seat 52 and the conductive contact arm 53 are not charged when the isolation mechanism is in the off state.

The insulating rubber cover 55 in this embodiment is made of a silicone rubber material, and the preferable material is the one that utilizes the comprehensive characteristics of silicone rubber, such as high elasticity, heat resistance, and insulation.

In a further technical solution in this embodiment, as shown in fig. 3 and 7, a rubber pad 9 is compressed between the bottom end of the pole 2 and the mechanism box 1, the rubber pad 9 has an annular corrugated portion 91 extending into the vertical chamber 3, an inner edge of the annular corrugated portion 91 is tightly connected to the insulating pull rod 54, the rubber pad 9 is arranged to play an isolation role, so as to ensure the sealing performance of the vertical chamber, and the annular corrugated portion 91 is arranged to prevent the insulating pull rod 54 from excessively pulling the rubber pad 9 in the up-and-down movement process; further, in order to realize the connection between the annular corrugated portion 91 and the insulating pull rod 54, in this embodiment, the insulating pull rod 54 has an annular clamping groove 541 tightly sleeved with the inner edge of the annular corrugated portion 91, that is, the annular corrugated portion 91 and the annular clamping groove 541 are matched to realize a quick and reliable connection.

As a further improvement of this embodiment, as shown in fig. 3 and fig. 4, the insulating pull rod 54 includes an upper connecting rod 542 and a lower insulating rod 543, a lower end of the upper connecting rod 542 is connected to an upper end of the lower insulating rod 543 through an elastic connection structure, and the insulating pull rod 54 has axial elasticity due to the arrangement of the elastic connection structure, so as to play an elastic buffer role when controlling switching on/off, and better protect the operating mechanism in the mechanism box; the elastic connection structure comprises a connection slot 544 arranged at the upper end of the lower insulating rod 543, a blocking platform 545 arranged at the lower end of the upper connecting rod 542 and extending into the connection slot 544, a limit nut 546 movably sleeved on the upper connecting rod 542 and fixed at the upper port of the connection slot 544, and a helical compression spring 547 arranged in the connection slot 544, the stop 545 is stopped and limited in the connection slot 544 by the stop nut 546 to realize connection, when the lower insulating rod 543 is driven by the operating mechanism to move downwards, the upper connecting rod 52 is driven to move downwards by the cooperation of the blocking platform 545 and the limit nut 546 so as to drive the vacuum arc-extinguishing chamber disconnecting/isolating mechanism to be disconnected, the upper and lower ends of the helical compression spring 547 are respectively abutted against the bottom of the blocking platform 545 and the bottom of the connection slot 544, the helical compression spring provides elastic force for the extension of the upper connecting rod 542 and the lower insulating rod 543 after compression.

In a further technical solution of this embodiment, as shown in fig. 3, the lower insulating rod 543 is provided with hollow portions and annular bosses 548 arranged at intervals along the axial direction; the creepage distance can be further increased through the arrangement of the annular boss 548 and the hollow-out part, and the safety is improved.

In this embodiment, utmost point post 2 passes through the screw fixation on the upper portion of mechanism case 1, specifically the screw pass through the screw perforation on the mechanism case 1 with the screw hole cooperation on the utmost point post 2.

In a specific implementation manner in this embodiment, the vacuum arc-extinguishing chamber 4 and the pole 2 are cast into a whole, so that a manual assembly process is omitted, and a good fixing and connecting effect is achieved; be equipped with silicon rubber layer 8 on 2 outer walls of utmost point post, just 8 surfaces of silicon rubber layer are equipped with convex full skirt 81, have further increased creepage distance through set up full skirt 81 on silicon rubber layer 8 for its security performance is better.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.

Claims

1. An outdoor high-voltage vacuum circuit breaker comprises a mechanism box (1) and three poles (2) arranged at the upper part of the mechanism box (1); two vertical chambers (3) which are relatively independent are arranged in each pole column (2), a vacuum arc extinguish chamber (4) and an isolating mechanism (5) are respectively arranged in the two vertical chambers (3), a wire inlet end (6) and a wire outlet end (7) are arranged outside each pole column (2), the isolating mechanism (5) comprises an upper conductive seat (51) and a lower conductive seat (52) which are fixed in the vertical chambers (3) at intervals from top to bottom, and a conductive contact arm (53) which can move up and down and is always connected with the lower conductive seat (52), one of the upper conductive seat (51) and the lower conductive seat (52) is connected with the wire inlet end (6), the other is electrically connected with an upper static contact of the vacuum arc extinguish chamber (4) through a conductive plate (10), the lower end of the vacuum arc extinguish chamber (4) is electrically connected with the wire outlet end (7), and the lower end of the vacuum arc extinguish chamber (4) and the lower end of the conductive contact arm (53) are both pulled through insulation The rod (54) is connected with an operating mechanism (11) in the mechanism box (1); it is characterized in that the preparation method is characterized in that,

an insulating rubber sleeve (55) is fixed between the upper conductive seat (51) and the lower conductive seat (52) in the vertical cavity (3), the periphery of the insulating rubber sleeve (55) is tightly connected with the inner wall of the vertical cavity (3), a through hole (56) for the conductive contact arm (53) to pass through is formed in the center of the insulating rubber sleeve (55), a plurality of fan-shaped shielding sheets (57) distributed along the circumferential direction are integrally formed at the through hole (56) on the insulating rubber sleeve (55), the through hole (56) is sealed by splicing the fan-shaped shielding sheets (57) in a normal state, and the upper end of the conductive contact arm (53) is lower than the fan-shaped shielding sheet (57) when moving to the lowest position.

2. An outdoor high-voltage vacuum circuit breaker according to claim 1, characterized in that the wire inlet end (6) is arranged at the top end of the pole (2) and connected with the upper conductive seat (51), the conductive plate (10) is of a Z-shaped structure, and the lower conductive seat (52) is connected with the upper static contact of the vacuum interrupter (4).

3. Outdoor high-voltage vacuum circuit breaker according to claim 1, characterized in that the insulating rubber sleeve (55) is of silicone rubber.

4. An outdoor high-voltage vacuum circuit breaker according to claim 1, characterized in that a rubber pad (9) is compressed between the bottom end of the pole (2) and the mechanism box (1), the rubber pad (9) has an annular corrugated portion (91) extending into the vertical chamber (3), and the inner edge of the annular corrugated portion (91) is tightly connected with the insulating pull rod (54).

5. An outdoor high-voltage vacuum circuit breaker according to claim 4, characterized in that the insulating pull rod (54) is provided with an annular clamping groove (541) tightly sleeved with the inner edge of the annular corrugated part (91).

6. The outdoor high voltage vacuum circuit breaker according to claim 1, characterized in that the insulation pull rod (54) comprises an upper connection rod (542) and a lower insulation rod (543), the lower end of the upper connection rod (542) is connected with the upper end of the lower insulation rod (543) through an elastic connection structure;

the elastic connection structure comprises a connection slot (544) arranged at the upper end of the lower insulating rod (543), a blocking platform (545) arranged at the lower end of the upper connecting rod (542) and extending into the connection slot (544), a limiting nut (546) movably sleeved on the upper connecting rod (542) and fixed at the upper port of the connection slot (544), and a spiral pressure spring (547) arranged in the connection slot (544), wherein the blocking platform (545) is blocked and limited in the connection slot (544) by the limiting nut (546), and the upper end and the lower end of the spiral pressure spring (547) are respectively abutted to the bottom of the blocking platform (545) and the inner bottom of the connection slot (544).

7. The outdoor high-voltage vacuum circuit breaker according to claim 6, characterized in that the lower insulating rod (543) is provided with hollowed-out portions and annular bosses (548) arranged at intervals along the axial direction.

8. An outdoor high-voltage vacuum circuit breaker according to claim 1, characterized in that the pole (2) is fixed to the upper part of the mechanism case (1) by means of screws.

9. An outdoor high-voltage vacuum circuit breaker according to claim 1, characterized in that the vacuum interrupter (4) is cast in one piece with the pole (2);

and a silicone rubber layer (8) is arranged on the outer wall of the pole (2), and a convex umbrella skirt (81) is arranged on the surface of the silicone rubber layer (8).