CN212461512U

CN212461512U - Vacuum arc-extinguishing chamber with buffer function

Info

Publication number: CN212461512U
Application number: CN202021579207.6U
Authority: CN
Inventors: 陈益飞; 陈璟晗
Original assignee: 777 Electric Technology Co ltd
Current assignee: 777 Electric Technology Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-02-02
Anticipated expiration: 2030-08-03

Abstract

The utility model discloses a vacuum interrupter with buffer function, including aluminum hull and glass layer, the inside of aluminum hull is fixed with the convex strip, and the outside of convex strip is provided with the porcelain shell, the outside below of porcelain shell is installed and is moved the end cover board, and moves the top of end cover board and be provided with the bellows, the porcelain block is installed to the top of bellows, the external fixation who moves the conducting rod has the moving contact, the external fixation of static contact has static conducting rod, the outside of soft gasket is provided with protruding conducting rod, the glass level is in the inside of porcelain shell, the inside on glass layer is provided with the shield cover. This vacuum interrupter with buffer function compares with current ordinary vacuum interrupter, has strengthened vacuum interrupter heat conductivity, absorbs heat energy with higher speed, has reached quick heat dissipation and cooling, reaches extremely radiating effect that reaches, can promote vacuum interrupter heat resistance greatly to make vacuum interrupter have higher post-arc dielectric strength recovery rate.

Description

Vacuum arc-extinguishing chamber with buffer function

Technical Field

The utility model relates to a vacuum interrupter technical field specifically is a vacuum interrupter with buffer function.

Background

A vacuum arc-extinguishing chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The device has the characteristics of energy conservation, material conservation, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like. The vacuum arc-extinguishing chamber is divided into an arc-extinguishing chamber for a circuit breaker and an arc-extinguishing chamber for a load switch from the aspect of use, the arc-extinguishing chamber for the circuit breaker is mainly used for transformer substations and power grid facilities in the power sector, and the arc-extinguishing chamber for the load switch is mainly used for end users of a power grid.

The existing vacuum arc extinguish chamber does not have a buffering function, in the moment of generating electric arcs, huge energy can possibly damage or destroy internal parts of the vacuum arc extinguish chamber, the use of the vacuum arc extinguish chamber is influenced, the service life of the vacuum arc extinguish chamber is shortened, the use requirements of people can not be well met, and technical innovation is performed on the basis of the existing vacuum arc extinguish chamber according to the situation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum interrupter with buffer function to propose general vacuum interrupter and do not possess buffer function in solving above-mentioned background art, in the twinkling of an eye that produces electric arc, huge energy can cause damage or damage to the inside spare part of vacuum interrupter, influence vacuum interrupter's use and reduce vacuum interrupter life, the not fine user demand problem that satisfies people.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a vacuum interrupter with buffer function, includes aluminum hull and glass layer, the inside of aluminum hull is fixed with the convex strip, and the outside of convex strip is provided with the porcelain shell, the outside below of porcelain shell is installed and is moved the end cover board, and moves the top of end cover board and be provided with the bellows, the porcelain block is installed to the top of bellows, and the inside of porcelain block is provided with moves the conducting rod, the external fixation that moves the conducting rod has the moving contact, and the outside of moving contact is provided with the static contact, the external fixation of static contact has static conducting rod, and the outside of static conducting rod is provided with soft gasket, the outside of soft gasket is provided with protruding conducting rod, and the externally mounted of protruding conducting rod has quiet end cover board, the glass level is in the inside of porcelain shell, the inside on glass layer is provided with the shield cover, and the inside of shield cover is fixed with annular glass strip.

Preferably, constitute welding integral structure between aluminum hull and the convex strip, and the convex strip distributes along the vertical line equidistance of aluminum hull.

Preferably, the outer surface of the ceramic shell is attached to the inner surface of the aluminum shell, and the ceramic shell is movably connected with the movable end cover plate.

Preferably, the upper surface of the moving contact is tightly attached to the lower surface of the static contact, and the central axis of the moving contact coincides with the central axis of the static contact.

Preferably, the static conducting rod and the convex conducting rod form an elastic structure through a soft gasket, and the convex conducting rod is fixedly connected with the static end cover plate.

Preferably, the outer surface of the glass layer is tightly attached to the inner surface of the porcelain shell, and the central axis of the glass layer coincides with the central axis of the porcelain shell.

Preferably, an integrated structure is formed between the shielding cover and the annular glass strips, and the annular glass strips are distributed at equal intervals along the vertical line of the shielding cover.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a setting of aluminum hull and convex strip, let aluminum hull and convex strip and porcelain shell have bigger area of contact to strengthen the vacuum interrupter heat conductivity, absorb heat energy with higher speed, reached quick heat dissipation and cooling, reached the extremely radiating effect, can promote vacuum interrupter heat resistance greatly, thus make the vacuum interrupter have higher medium strength recovery rate after the arc;

2. the utility model protects the internal parts of the vacuum arc extinguish chamber through the arrangement of the static conductive rod, the soft gasket and the convex conductive rod, when the vacuum arc extinguish chamber is impacted by electric arc, the internal important parts can not be damaged, the energy generated by the electric arc can be effectively buffered, the use can not be influenced, the danger can be effectively avoided, and the protection performance and the safety can be enhanced;

3. the utility model discloses a holistic rigidity of vacuum interrupter has been strengthened in the setting of glass layer and annular glass strip, and the outside aluminum hull of cooperation porcelain shell reaches inside and outside anti-crushing function concurrently for can not deform easily or damaged when vacuum interrupter is inside and outside atress, avoided giving people and made very big economic loss, improved vacuum interrupter breaking current's ability and life.

Drawings

FIG. 1 is a schematic view of a front view half-section structure of the present invention;

FIG. 2 is a schematic view of the structure of the present invention;

fig. 3 is a schematic view of the three-dimensional structure of the static conductive rod of the present invention.

In the figure: 1. an aluminum shell; 2. a convex strip; 3. a porcelain shell; 4. a movable end cover plate; 5. a bellows; 6. a porcelain block; 7. a movable conductive rod; 8. a moving contact; 9. static contact; 10. a static conductive rod; 11. a soft gasket; 12. a convex conductive rod; 13. a stationary end cover plate; 14. a glass layer; 15. a shield case; 16. an annular glass strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a vacuum arc extinguish chamber with a buffering function comprises an aluminum shell 1 and a glass layer 14, wherein a convex strip 2 is fixed inside the aluminum shell 1, a ceramic shell 3 is arranged outside the convex strip 2, a welding integrated structure is formed between the aluminum shell 1 and the convex strip 2, the convex strips 2 are distributed at equal intervals along a vertical line of the aluminum shell 1, and the aluminum shell 1 and the convex strips 2 have larger contact areas with the ceramic shell 3 through the arrangement of the aluminum shell 1 and the convex strips 2, so that the thermal conductivity of the vacuum arc extinguish chamber is enhanced, heat energy is absorbed in an accelerating manner, rapid heat dissipation and cooling are achieved, an extremely-caused heat dissipation effect is achieved, the heat resistance of the vacuum arc extinguish chamber can be greatly improved, and the vacuum arc extinguish chamber has higher medium strength recovery speed after arc;

a movable end cover plate 4 is arranged below the outer part of the porcelain shell 3, a corrugated pipe 5 is arranged above the movable end cover plate 4, the outer surface of the porcelain shell 3 is attached to the inner surface of the aluminum shell 1, the porcelain shell 3 is movably connected with the movable end cover plate 4, a porcelain block 6 is arranged above the corrugated pipe 5, a movable conducting rod 7 is arranged inside the porcelain block 6, a movable contact 8 is fixed outside the movable conducting rod 7, a fixed contact 9 is arranged outside the movable contact 8, the upper surface of the movable contact 8 is closely attached to the lower surface of the fixed contact 9, the central axis of the movable contact 8 is overlapped with the central axis of the fixed contact 9, a static conducting rod 10 is fixed outside the fixed contact 9, a soft gasket 11 is arranged outside the static conducting rod 10, the static conducting rod 10 forms an elastic structure with a convex rod 12 through the soft gasket 11, the convex conducting rod 12 is fixedly connected with the fixed end cover plate 13, a convex conducting rod 12 is arranged outside the soft gasket 11, the static end cover plate 13 is arranged outside the convex conducting rod 12, and through the arrangement of the static conducting rod 10, the soft gasket 11 and the convex conducting rod 12, parts inside the vacuum arc extinguish chamber are protected, important parts inside the vacuum arc extinguish chamber cannot be damaged when the vacuum arc extinguish chamber is impacted by electric arcs, energy generated by the electric arcs is effectively buffered, the use cannot be influenced, dangers are effectively avoided, and the protection performance and the safety are enhanced;

glass layer 14 is located porcelain shell 3's inside, glass layer 14's surface and porcelain shell 3's internal surface closely laminate, and glass layer 14's axis coincides mutually with porcelain shell 3's axis, glass layer 14's inside is provided with shield cover 15, and shield cover 15's inside is fixed with annular glass strip 16, constitute the integral structure between shield cover 15 and the annular glass strip 16, and annular glass strip 16 distributes along shield cover 15's vertical line equidistance, through glass layer 14 and annular glass strip 16's setting, the holistic rigidity of vacuum interrupter has been strengthened, cooperation porcelain shell 3 outside aluminium casing 1 reaches inside and outside anti-crushing function concurrently, can not easily warp or damage when making inside and outside atress of vacuum interrupter, avoided giving people and made very big economic loss, vacuum interrupter opens the ability and the life of electric current.

The working principle is as follows: when the vacuum arc-extinguishing chamber with the buffering function is used, firstly, the vacuum arc-extinguishing chamber in the vacuum bubble is an electric vacuum device which utilizes high-vacuum working insulating arc-extinguishing medium and realizes the on-off function of a power circuit by a moving contact 8 and a static contact 9 in a shielding cover 15, the interior of the shielding cover 15 is in a vacuum state, when the vacuum arc-extinguishing chamber cuts off a certain value of current, the moving contact 8 pushes away a moving conducting rod 7 at the moment that the moving contact 8 and the static contact 9 are separated, the moving conducting rod 7 is arranged in a corrugated pipe 5 and a porcelain block 6, the current shrinks to the point where the moving contact 8 and the static contact 9 are just separated, at the moment, a static conducting rod 10 outside the static contact 9 forms an elastic structure through a soft gasket 11 and a convex conducting rod 12 to buffer the energy of electric arcs, the resistance between electrodes is sharply increased and the temperature is rapidly increased in the interior of, meanwhile, extremely high electric field intensity is formed, extremely strong emission and gap breakdown are caused, vacuum electric arcs are generated, annular glass strips 16 in a shielding cover 15 and an external glass layer 14 are reinforced and rigid to prevent breakage, when power frequency current is close to zero, the distance between a movable contact 8 and a fixed contact 9 is increased, plasma of the vacuum electric arcs is diffused to the periphery quickly, a porcelain shell 3 is in close contact with an aluminum shell 1 and a convex strip 2 to achieve quick heat dissipation and temperature reduction, after the electric arc current crosses zero, a medium in the gap between the movable contact 8 and the fixed contact 9 is changed into an insulator quickly by a conductor, so that the current is cut off, due to the special structure of the movable contact 8 and the fixed contact 9, a proper longitudinal magnetic field is generated in the gap between the movable contact 8 and the fixed contact 9 during arcing, the magnetic field can enable electric arcs to be uniformly distributed on the surfaces of the movable contact 8 and the fixed contact 9, low electric arc voltage is maintained, and, the vacuum arc-extinguishing chamber with the buffer function has the advantages of small arc energy and small corrosion rate, so that the capacity of breaking current of the vacuum arc-extinguishing chamber is improved, and the service life of the vacuum arc-extinguishing chamber is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a vacuum interrupter with buffer function, includes aluminum hull (1) and glass layer (14), its characterized in that: the aluminum shell is characterized in that a convex strip (2) is fixed inside the aluminum shell (1), a porcelain shell (3) is arranged outside the convex strip (2), a movable end cover plate (4) is installed below the outside of the porcelain shell (3), a corrugated pipe (5) is arranged above the movable end cover plate (4), a porcelain block (6) is installed above the corrugated pipe (5), a movable conducting rod (7) is arranged inside the porcelain block (6), a movable contact (8) is fixed outside the movable conducting rod (7), a static contact (9) is arranged outside the movable contact (8), a static conducting rod (10) is fixed outside the static contact (9), a soft gasket (11) is arranged outside the static conducting rod (10), a convex conducting rod (12) is arranged outside the soft gasket (11), a static end cover plate (13) is installed outside the convex conducting rod (12), and a glass layer (14) is located inside the porcelain shell (3), a shielding cover (15) is arranged inside the glass layer (14), and an annular glass strip (16) is fixed inside the shielding cover (15).

2. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: constitute welding integral structure between aluminum hull (1) and convex strip (2), and convex strip (2) distribute along the vertical line equidistance of aluminum hull (1).

3. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: the outer surface of the porcelain shell (3) is attached to the inner surface of the aluminum shell (1), and the porcelain shell (3) is movably connected with the movable end cover plate (4).

4. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: the upper surface of the moving contact (8) is tightly attached to the lower surface of the static contact (9), and the central axis of the moving contact (8) is coincident with the central axis of the static contact (9).

5. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: the static conducting rod (10) and the convex conducting rod (12) form an elastic structure through the soft gasket (11), and the convex conducting rod (12) is fixedly connected with the static end cover plate (13).

6. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: the outer surface of the glass layer (14) is tightly attached to the inner surface of the porcelain shell (3), and the central axis of the glass layer (14) coincides with the central axis of the porcelain shell (3).

7. The vacuum arc-extinguishing chamber with the buffer function according to claim 1, characterized in that: an integrated structure is formed between the shielding cover (15) and the annular glass strips (16), and the annular glass strips (16) are distributed along the vertical line of the shielding cover (15) at equal intervals.