CN214043517U

CN214043517U - Solid-sealed polar pole

Info

Publication number: CN214043517U
Application number: CN202120171711.0U
Authority: CN
Inventors: 刘灿彬; 林春华; 陆健; 郭泽强; 高剑英
Original assignee: Xiamen Naide Electric Co ltd
Current assignee: Xiamen Naide Electric Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-08-24
Anticipated expiration: 2031-01-22

Abstract

The utility model provides an embedded pole, which comprises an insulating shell, a vacuum arc extinguish chamber embedded in the insulating shell, an upper wire outlet seat connected with the static end of the vacuum arc extinguish chamber and a lower wire outlet seat connected with the movable end of the vacuum arc extinguish chamber through flexible connection, wherein the insulating shell is provided with an insulating cavity, and the movable end and the flexible connection of the vacuum arc extinguish chamber are both positioned in the insulating cavity; the solid-sealed polar pole further comprises an insulating pad, wherein the insulating pad is arranged in an insulating cavity of the insulating shell and covers the connecting end part connected with the lower outlet base in the flexible connection. Make the clear distance of inside insulation air obvious grow, improve the lightning impulse withstand voltage of product greatly to the insulating grade of effectual improvement product makes the product can satisfy the user demand of higher height above sea level.

Description

Solid-sealed polar pole

Technical Field

The utility model relates to an electrical switch field, concretely relates to can effectively improve solid utmost point post that seals of insulation level.

Background

The solid-sealed pole is formed by embedding conductive parts related to a Vacuum interrupter (Vacuum interrupter) and a Circuit breaker (Circuit-breaker) into easily-cured solid insulating materials such as epoxy resin or thermoplastic materials, so that the whole pole of the Circuit breaker becomes an integral part.

The external space of the solid-sealed polar pole is large, the creep distance of the umbrella group is well treated, and the outside of the solid-sealed polar pole is provided with enough space to be sleeved with the sheath, so that the insulation grade can be effectively improved if the common contact arm sheath is used, and the internal insulation of the polar pole becomes the bottleneck of improving the insulation grade under the common condition.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses an insulating improvement to sealing utmost point post inner structure admittedly provides one kind and can effectively improve insulating grade seals utmost point post admittedly.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

an embedded pole comprises an insulating shell, a vacuum arc-extinguishing chamber embedded in the insulating shell, an upper wire outlet seat connected with a static end of the vacuum arc-extinguishing chamber and a lower wire outlet seat connected with a movable end of the vacuum arc-extinguishing chamber through flexible connection, wherein the insulating shell is provided with an insulating cavity, and the movable end and the flexible connection of the vacuum arc-extinguishing chamber are both positioned in the insulating cavity; the flexible connection device is characterized by further comprising an insulating pad, wherein the insulating pad is arranged in an insulating cavity of the insulating shell and covers the connection end part connected with the lower wire outlet seat in the flexible connection.

Furthermore, the connection end part of the flexible connection and the lower wire outlet seat is defined as the connection end part of the lower wire outlet seat, the insulation pad is further extended and protruded with a surrounding dam, and the surrounding dam surrounds the peripheral side of the connection end part of the lower wire outlet seat.

Furthermore, the inner wall in insulating chamber is formed with the full skirt, still be formed with the constant head tank on the insulating pad to realize the location connection through the constant head tank joint on one of them full skirt.

Furthermore, the periphery of the box dam is further provided with a limiting convex rib in a protruding mode, and the box dam and the limiting convex rib are enclosed together to form the positioning groove.

The outer side of the connecting end part connected with the lower wire outlet seat in the flexible connection is also provided with a fixed pad, the flexible connection and the lower wire outlet seat are provided with corresponding first connecting through holes, and the flexible connection wire outlet device also comprises a first fastener, and the first fastener is fixedly arranged in the corresponding first connecting through holes on the fixed pad, the flexible connection and the lower wire outlet seat in a penetrating manner so as to fix the fixed pad, the flexible connection and the lower wire outlet seat; the insulating pad also covers the fixing pad.

Furthermore, the insulating pad and the fixing pad are also provided with corresponding second connecting through holes, and the fixing pad further comprises second fasteners, and the second fasteners are fixedly arranged in the corresponding second connecting through holes in the insulating pad and the fixing pad in a penetrating manner so as to fix the insulating pad and the fixing pad.

Furthermore, the insulating pad is a silica gel insulating pad.

Through the utility model provides a technical scheme has following beneficial effect:

increase insulating pad in the inside (insulating chamber) of solid utmost point post that seals, cover through this insulating pad with the connection tip of being qualified for the next round of competitions the seat connection down in the flexible coupling for the clear grow of inside insulation air clear distance improves the lightning impulse withstand voltage of product greatly, with the insulating grade of effectual improvement product, makes the product can satisfy the user demand of higher height above sea level (the height above sea level is higher, and is high more to the insulating grade requirement of product).

Meanwhile, the opening and closing actions of the movable end of the vacuum arc extinguish chamber are not influenced. Simple structure and effectively improve the insulation grade of solid utmost point post of sealing.

Drawings

FIG. 1 is a schematic view of an embodiment of an embedded pole;

FIG. 2 is an appearance view of the embedded pole at another angle in the embodiment;

FIG. 3 is a cross-sectional view of the embedded pole in the embodiment;

FIG. 4 is an exploded view of a portion of the basic structure of the cross-sectional view of FIG. 3;

fig. 5 is a schematic perspective view of an embodiment of an insulating pad.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 5, the embedded pole provided in this embodiment includes an insulating housing 10, a vacuum interrupter 20 embedded in the insulating housing 10, an upper wire outlet seat 30 connected to a stationary end of the vacuum interrupter 20, and a lower wire outlet seat 40 connected to a moving end of the vacuum interrupter 20 through a flexible connection 50 (typically, a flexible copper), where the insulating housing 10 has an insulating cavity 101, and the moving end of the vacuum interrupter 20 and the flexible connection 50 are both located in the insulating cavity 101. When the vacuum switch is assembled and used, the insulating pull rod extends into the insulating cavity 101 from the outside and is connected with the movable end of the vacuum arc-extinguishing chamber 20, and the movable end of the vacuum arc-extinguishing chamber 20 is driven to move through the insulating pull rod, so that the switching-on and switching-off of the vacuum arc-extinguishing chamber 20 are realized.

Specifically, in the flexible connection 50, a connection end portion connected to the moving end of the vacuum interrupter 20 is a moving end connection end portion 52, and a connection end portion connected to the lower outlet base 40 is a lower outlet base connection end portion 51.

The embedded pole further comprises an insulating pad 60, wherein the insulating pad 60 is arranged in the insulating cavity 101 of the insulating shell 10 and covers a connecting end part (i.e. a lower wire outlet seat connecting end part 51) of the flexible connection 50, which is connected with the lower wire outlet seat 40.

Increase insulating pad 60 in the inside (insulating chamber 101) of solid utmost point post that seals, cover through this insulating pad 60 with the tip of being connected of being qualified for the next round of competitions seat 40 down in the flexible coupling for the clear distance of inside insulation air obviously enlarges, improves the lightning impulse withstand voltage of product greatly, with the insulating grade of effectual improvement product, makes the product can satisfy the user demand of higher height above sea level (the height above sea level is higher, the insulating grade requirement to the product is higher). Meanwhile, the opening and closing actions of the movable end of the vacuum arc extinguish chamber 20 are not influenced. Simple structure and effectively improve the insulation grade of solid utmost point post of sealing.

Further, in order to achieve a better insulation effect, in this embodiment, the insulation pad 60 further extends and protrudes to form a dam 61, and the dam 61 surrounds the outer peripheral side of the flexible connector 50, so that the lower wire outlet seat connection end 51 of the flexible connector 50 is better covered, the insulation effect is better, and the insulation grade is more effectively improved. Of course, in other embodiments, the dam 61 structure may be provided without a protrusion.

Further, an umbrella skirt 11 is formed on the inner wall of the insulating cavity 101, and the umbrella skirt 11 is used for increasing creepage distance and is a relatively common structure in the prior art. The insulating pad 60 is further formed with a positioning groove 62, and the positioning groove 62 is clamped on one of the sheds 11 (the top shed in the insulating cavity 101 in fig. 3 and 4) to realize positioning connection. The existing umbrella skirt 11 structure is utilized for positioning, the structure is simple, the original structure of the insulating shell 10 is not required to be changed, a mould for preparing the insulating shell 10 is not required to be changed in production, and the cost is greatly saved.

Specifically, the periphery of the box dam 61 of the insulating pad 60 is further provided with a limiting convex rib 63 in a protruding mode, the box dam 61 and the limiting convex rib 63 jointly enclose and form the positioning groove 62, and the structure design is simple and ingenious. Of course, in other embodiments, the positioning connection structure of the insulating pad 60 is not limited thereto.

Specifically, in this embodiment, the fixed connection structure between the lower wire outlet seat connection end 51 of the flexible connection 50 and the lower wire outlet seat 40 is as follows: a fixing pad 70 is further arranged on the outer side of the connecting end portion (i.e., the lower wire outlet base connecting end portion 51) of the flexible connection 50 connected with the lower wire outlet base 40, corresponding first connecting through holes are formed in the fixing pad 70, the flexible connection 50 and the lower wire outlet base 40, namely, the first connecting through hole 71 of the fixing pad 70, the first connecting through hole 511 of the flexible connection 50 and the first connecting through hole 41 of the lower wire outlet base 40 correspond to each other, and a first fastening member (not shown) is further included, and the first fastening member is fixedly arranged in the corresponding first connecting through holes in the fixing pad 70, the flexible connection 50 and the lower wire outlet base 40 in a penetrating manner so as to fix the fixing pad 70, the flexible connection 50 and the lower wire outlet base 40; specifically, the first fastening member is connected to the lower wire outlet base 40 by sequentially passing through the first connection through hole 41 of the lower wire outlet base 40, the first connection through hole 511 of the flexible connector 50, and the first connection through hole 71 of the fixing pad 70. The first connecting through hole 71 of the fixing pad 70 and the first connecting through hole 41 on the lower wire outlet base 40 are screw holes, the first fastening member is a bolt, and the bolt is screwed and fixed in the screw holes on the fixing pad 70 and the lower wire outlet base 40, so as to fix the fixing pad 70, the flexible connection 50 and the lower wire outlet base 40. The reason for adding the fixing pad is as follows: generally, the flexible connection 50 is formed by stacking a plurality of flexible copper sheets, so that the connection through hole 511 on the flexible connection 50 cannot be made into a screw hole, and when the flexible connection needs to be locked by a screw, a fixing pad 70 needs to be additionally arranged on the outer side of the connection end part of the lower wire outlet base to realize the fixed connection by the screw lock. Meanwhile, the insulating pad 60 also covers the fixing pad 70, so that insulating isolation is realized.

More specifically, add this fixed bolster 70, also conveniently fix insulating pad 60, its specific fixed knot constructs: the insulating pad 60 and the fixing pad 70 are further provided with corresponding second connecting through holes, such as the second connecting through hole 64 of the insulating pad 60 in fig. 5, and the second connecting through hole of the fixing pad 70 is not shown. And a second fastening member (not shown) fixedly inserted into the corresponding second connecting through holes of the insulating pad 60 and the fixing pad 70 to fix the insulating pad 60 and the fixing pad 70. Specifically, the second connecting through holes on the insulating pad 60 and the fixing pad 70 are also screw holes, the second fastening members are bolts, and the insulating pad 60 and the fixing pad 70 are fixed by the bolts and the screw holes.

Certainly, in other embodiments, the fixed connection structure of the lower outlet base connection end 51 of the flexible connection 50 and the lower outlet base 40 and the fixed connection structure of the insulating pad 60 are not limited thereto, for example, the lower outlet base connection end 51 of the flexible connection 50 and the lower outlet base 40 may be fixed by welding or the like to achieve electrical contact, and there is no need to add the fixing pad 70; as another example, the insulating pad 60 may be directly fixedly connected to the insulating housing 10.

In this embodiment, the insulating pad 60 is a silicone insulating pad, which has good insulating property and low cost, but in other embodiments, an insulating pad such as a rubber insulating pad or an insulating resin pad may be used.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An embedded pole comprises an insulating shell, a vacuum arc-extinguishing chamber embedded in the insulating shell, an upper wire outlet seat connected with a static end of the vacuum arc-extinguishing chamber and a lower wire outlet seat connected with a movable end of the vacuum arc-extinguishing chamber through flexible connection, wherein the insulating shell is provided with an insulating cavity, and the movable end and the flexible connection of the vacuum arc-extinguishing chamber are both positioned in the insulating cavity; the method is characterized in that: the flexible connection device is characterized by further comprising an insulating pad, wherein the insulating pad is arranged in an insulating cavity of the insulating shell and covers the connection end part connected with the lower wire outlet seat in the flexible connection.

2. The embedded pole of claim 1, wherein: the connection end part connected with the lower wire outlet seat in the soft connection is defined as the connection end part of the lower wire outlet seat, the insulation pad is further extended and protruded to form a surrounding dam, and the surrounding dam surrounds the peripheral side of the connection end part of the lower wire outlet seat.

3. The embedded pole of claim 2, wherein: the inner wall in insulating chamber is formed with the full skirt, still be formed with the constant head tank on the insulating pad to realize the location connection through the constant head tank joint on one of them full skirt.

4. The embedded pole of claim 3, wherein: the insulation pad is further provided with a limiting convex rib in a protruding mode on the periphery of the box dam, and the box dam and the limiting convex rib are enclosed together to form the positioning groove.

5. The embedded pole of claim 1, wherein: the outer side of the connecting end part connected with the lower wire outlet seat in the flexible connection is also provided with a fixed pad, the flexible connection and the lower wire outlet seat are provided with corresponding first connecting through holes, and the flexible connection wire outlet device also comprises a first fastener, and the first fastener is fixedly arranged in the corresponding first connecting through holes on the fixed pad, the flexible connection and the lower wire outlet seat in a penetrating manner so as to fix the fixed pad, the flexible connection and the lower wire outlet seat; the insulating pad also covers the fixing pad.

6. The embedded pole of claim 5, wherein: the insulating pad and the fixing pad are further provided with corresponding second connecting through holes, and the insulating pad and the fixing pad further comprise second fasteners, and the second fasteners are fixedly arranged in the corresponding second connecting through holes in the insulating pad and the fixing pad in a penetrating mode so as to fix the insulating pad and the fixing pad.

7. The embedded pole of claim 1, wherein: the insulating pad is a silica gel insulating pad.