CN215578348U

CN215578348U - Indoor high-voltage three-station vacuum circuit breaker

Info

Publication number: CN215578348U
Application number: CN202122219020.6U
Authority: CN
Inventors: 雷翠翠; 张仕勇
Original assignee: Zhejiang Beiye Electric Co ltd
Current assignee: Zhejiang Beiye Electric Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-01-18
Anticipated expiration: 2031-09-14

Abstract

The utility model discloses an indoor high-voltage three-station vacuum circuit breaker, which comprises an earthing switch, a disconnecting switch and a solid-sealed pole; the embedded pole comprises a ceramic shell and a shielding cover arranged in the ceramic shell, wherein the outer circumferential surface of the shielding cover is provided with fixing lugs, and the fixing lugs are connected with a heat radiating piece; the ceramic shell is further provided with a counter bore, the heat dissipation piece penetrates through the counter bore to be connected with the fixing lug, the arranged sealing gasket is compacted in the counter bore, and through the mode, the high temperature generated by the moving contact and the static contact during working can be quickly dissipated by the heat dissipation piece, so that the temperature inside the shielding cover is reduced, and the problem that the temperature generated by the solid-sealed polar pole cannot be timely discharged, and the aging speed of the solid-sealed polar pole is accelerated is solved. Therefore, the utility model has simple structure and convenient installation of the shielding cover, can realize the rapid dissipation of heat, and slow down the aging speed of the shielding cover and the solid-sealed pole, thereby being worthy of popularization and application.

Description

Indoor high-voltage three-station vacuum circuit breaker

Technical Field

The utility model relates to the technical field of circuit breaker equipment, in particular to an indoor high-voltage three-station vacuum circuit breaker.

Background

The outdoor high-voltage three-station vacuum circuit breaker is provided with an embedded pole, a vacuum arc extinguish chamber in the embedded pole belongs to a passive electric vacuum device, is matched with a switching mechanism to form a vacuum switching device, and is widely applied to power transmission and distribution systems of industrial and mining enterprises, urban and rural power grids, electrified railways and the like.

When the moving contact and the static contact in the solid-sealed polar pole are contacted with each other, more heat can be generated, so that the temperature in the arc extinguish chamber is high, and the aging speed of the shielding cover and the solid-sealed polar pole is accelerated in a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an indoor high-voltage three-station vacuum circuit breaker to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: an indoor high-voltage three-station vacuum circuit breaker comprises an earthing switch, a disconnecting switch and a solid-sealed pole; the solid-sealed polar pole comprises a ceramic shell and a shielding cover arranged in the ceramic shell; the outer circumferential surface of the shielding cover is provided with fixing lugs, and the fixing lugs are connected with the heat dissipation part; the ceramic shell is further provided with a counter bore, the heat dissipation piece penetrates through the counter bore and then is connected with the fixing lug, and the arranged sealing gasket is compacted in the counter bore, so that the interior of the ceramic shell has good sealing performance.

As a preferred technical scheme of the utility model: the number of the fixed lugs is two, and the two fixed lugs are symmetrically arranged on the shielding case.

As a preferred technical scheme of the utility model: and one end of the heat dissipation piece, which is positioned outside the ceramic shell, is provided with heat dissipation fins for heat dissipation.

As a preferred technical scheme of the utility model: the heat dissipation piece is connected with the internal thread hole formed in the fixing lug in a matched mode through the external thread column.

As a preferred technical scheme of the utility model: the radiating piece is outer cylindric, just radiating fin's quantity is a plurality of, a plurality of radiating fin equidistance distribute in the footpath of radiating piece.

As a preferred technical scheme of the utility model: the cross section of the radiating fin is rectangular, and the radiating fin and the radiating piece are of an integrated structure.

By adopting the technical scheme, the utility model has the beneficial effects that: through the mode, the high temperature generated by the moving contact and the static contact during working can be quickly dissipated by the heat dissipation part, the temperature inside the shielding cover is reduced, and the problem that the temperature generated by the solid-sealed polar pole cannot be timely discharged, so that the aging speed of the solid-sealed polar pole is accelerated is solved.

Drawings

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

FIG. 2 is a partial cross-section of a ceramic housing and an exploded view of a heat sink according to the present invention;

FIG. 3 is a schematic view of the main structure of the shielding case of the present invention;

fig. 4 is a schematic view of a main structure of the heat sink of the present invention.

In the figure: 1. a ceramic housing; 2. a counter bore; 3. a gasket; 4. a heat sink; 5. a shield case; 6. fixing the ear; 7. an internally threaded bore; 8. heat dissipation fins; 9. an externally threaded post; 10. a grounding switch; 11. solid-sealing the pole; 12. and (4) an isolating switch.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "upper surface", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-4, an embodiment of the present invention is shown: an indoor high-voltage three-station vacuum circuit breaker comprises an earthing switch 10, a disconnecting switch 12 and a solid-sealed pole 11; the solid-sealed polar pole 11 comprises a ceramic shell 1 and a shielding cover 5 arranged in the ceramic shell 1; the outer circumferential surface of the shielding cover 5 is provided with a fixing lug 6, and the fixing lug 6 is connected with the heat dissipation part 4; the ceramic shell 1 is further provided with a counter bore 2, the heat dissipation piece 4 penetrates through the counter bore 2 and then is connected with the fixing lug 6, and the arranged sealing gasket 3 is compacted in the counter bore 2, so that the interior of the ceramic shell 1 has good sealing performance.

Through the mode, under the normal condition, the shielding cover 5 is not in contact with the moving contact and the fixed contact, heat produced by the moving contact and the fixed contact is generally transmitted to the shielding cover 5 in a radiation mode, so that the heat of the shielding cover 5 is transmitted to the radiating piece 4 by utilizing the fixing lug 6, rapid dissipation of the heat can be realized, and a power supply in the shielding cover 5 cannot be led out to the outside of the ceramic shell 1 by the radiating piece 4, so that the device is safe and reliable in use, and rapid dissipation of the heat can be realized, particularly, the indoor high-voltage three-position vacuum circuit breaker is provided with the solid sealing pole 11 which is generally positioned in a cabinet body, heat concentration is easily caused, if the heat is not dissipated in time, accelerated aging of the shielding cover 5 and the solid sealing pole 11 can be caused, and the service life of the whole vacuum circuit breaker is further influenced.

In addition, the device is simple and convenient to assemble and fix the shielding cover 5 through structural optimization without influencing the main structure of the solid-sealed polar pole 11, so that the problem that the shielding cover 5 can be fixed in the ceramic shell 1 only by arranging the step surface in the ceramic shell 1 and arranging the step surface on the outer circumferential surface of the shielding cover 5 is solved.

For the further fixing of the shielding case 5 of being convenient for, the number of the fixing lugs 6 is two, and two the fixing lugs 6 are symmetrically arranged on the shielding case 5, by the above mode, the shielding case 5 can be stably fixed in the ceramic shell 1, and the number of the fixing lugs 6 is two, so that two heat dissipation members 4 can be installed, and the heat dissipation efficiency of the device is further improved.

Because the radiating fins 8 for radiating heat are arranged at one end of the radiating piece 4, which is positioned outside the ceramic shell 1, the contact area between the radiating fins 8 and the air is enlarged, and the heat dissipation speed of the radiating piece 4 is further greatly improved.

Because the heat dissipation member 4 is in adaptive connection with the internal thread hole 7 formed in the fixing lug 6 through the external thread column 9, the heat dissipation member 4 and the shielding case 5 can be fixed in the simplest fixing mode, and the processing and assembling costs of the shielding case 5 and the heat dissipation member 4 can be relatively reduced.

Furthermore, the heat dissipation member 4 is cylindrical, the number of the heat dissipation fins 8 is multiple, and the multiple heat dissipation fins 8 are equidistantly distributed in the radial direction of the heat dissipation member 4, so that the heat dissipation efficiency is further improved; the two largest surfaces of the heat sink fins 8 are preferably parallel to the air flow surface during installation, so that a greater rate of heat dissipation can be achieved.

Because the cross section of the heat dissipation fins 8 is rectangular, and the heat dissipation fins 8 and the heat dissipation member 4 are of an integral structure, the heat dissipation member 4 and the heat dissipation fins 8 can be processed in a unified manner, and the processing efficiency of the heat dissipation member 4 is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. The utility model provides an indoor three station vacuum circuit breakers of high pressure which characterized in that: comprises a grounding switch (10), an isolating switch (12) and a solid-sealed pole (11);

The solid-sealed polar pole (11) comprises a ceramic shell (1) and a shielding cover (5) arranged in the ceramic shell (1);

the outer circumferential surface of the shielding cover (5) is provided with fixing lugs (6), and the fixing lugs (6) are connected with the heat dissipation part (4);

the ceramic shell (1) is further provided with a counter bore (2), the heat dissipation piece (4) penetrates through the counter bore (2) and then is connected with the fixing lug (6), and the arranged sealing gasket (3) is compacted in the counter bore (2), so that the interior of the ceramic shell (1) has good sealing performance.

2. An indoor high voltage three-position vacuum circuit breaker according to claim 1, characterized in that: the number of the fixing lugs (6) is two, and the two fixing lugs (6) are symmetrically arranged on the shielding case (5).

3. An indoor high voltage three-position vacuum circuit breaker according to claim 1 or 2, characterized in that: and one end of the heat dissipation piece (4) positioned outside the ceramic shell (1) is provided with a heat dissipation fin (8) for heat dissipation.

4. An indoor high voltage three-position vacuum circuit breaker according to claim 3, characterized in that: the heat dissipation piece (4) is connected with an internal thread hole (7) formed in the fixing lug (6) in a matched mode through an external thread column (9) arranged in the heat dissipation piece.

5. An indoor high voltage three-position vacuum circuit breaker according to claim 4, characterized in that: the radiating piece (4) is cylindrical, the number of the radiating fins (8) is multiple, and the radiating fins (8) are distributed on the radial direction of the radiating piece (4) at equal intervals.

6. An indoor high voltage three position vacuum circuit breaker according to claim 5 wherein: the cross section of the radiating fin (8) is rectangular, and the radiating fin (8) and the radiating piece (4) are of an integral structure.