Vacuum circuit breaker capable of controlling temperature rise

Abstract

The utility model discloses a vacuum circuit breaker capable of controlling temperature rise, which comprises a pole shell, the pole shell is provided with a cavity, an air duct is arranged between the cavity and the shell, the side wall of the bottom of the air duct is provided with a plurality of air inlet holes at equal intervals from bottom to top, and the air inlet holes are communicated with the cavity. And a plurality of heat dissipation holes at equal intervals are formed in the side wall above the air duct from top to bottom. When the solid-sealed polar pole is in operation, the heating density of hot air is reduced and increased, heat is conducted to the top of the air duct through the cavity and is discharged from the heat dissipation holes, and surrounding cold air is filled into the air duct from the air inlet holes, so that air convective circulation is formed, the temperature in the cavity is effectively reduced, and a product has the advantage of controlling the temperature rise.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum circuit breaker technical field especially relates to a kind of vacuum circuit breakers of temperature rise control. BACKGROUND

[0002] The main functions of vacuum circuit breaker include cutting off and connecting the no-load current and load current in high-voltage circuit, and cutting off fault current when system fault occurs, to prevent the expansion of accident and ensure the safe operation of system. Vacuum circuit breaker is named because its arc-extinguishing medium and the insulating medium of contact gap are both vacuum, and it has the advantages of small size, light weight, suitable for frequent operation and arc-extinguishing without maintenance.

[0003] In order to improve the sealing property of vacuum arc chamber, solid-sealed pole column is usually used and formed by epoxy resin pouring. Although this can improve the sealing property of vacuum arc chamber, the temperature inside the pole column continues to rise and accumulates during use due to its structure. High temperature can cause rapid aging of the electrical insulation material of vacuum circuit breaker, reduce the insulation performance, and cause thermal expansion of the conductive parts, resulting in poor contact or even disconnection, which affects the normal power supply of the circuit. Therefore, the applicant has made beneficial design and found a method to solve the above problems. The technical solution to be introduced below is generated in this background. SUMMARY

[0004] The utility model discloses a kind of products of temperature rise control to overcome the deficiency of the design of above-mentioned traditional vacuum circuit breaker.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A kind of vacuum circuit breaker of temperature rise control, including pole column shell, the pole column shell is equipped with cavity, the cavity is equipped with air duct with shell, the side wall of the air duct bottom is equipped with a plurality of equal-interval air inlet from bottom to top, the side wall of the air duct top is equipped with a plurality of equal-interval heat dissipation holes from top to bottom.

[0007] Preferably, the upper of the pole column shell is equipped with upper outgoing line end, the lower of the pole column shell is equipped with lower outgoing line end.

[0008] Preferably, the bottom of the pole column shell is equipped with mounting base, the four corners of the mounting base are equipped with positioning column, the positioning column is equipped with screw hole.

[0009] Preferably, the entrance of the air duct is arranged at the bottom of mounting base, the entrance of the air duct is equipped with drainage part that expands to both sides, the air duct is arranged as half ring.

[0010] Beneficial effects:

[0011] Compared with the prior art, the utility model has the advantages of

[0012] The utility model discloses, when solid seal pole is in operation, hot air is heated density small and rises, and the heat is given to the top of air duct through the heat conduction of cavity, and is discharged from the heat dissipation hole, and the cold air of surrounding fills into the air duct from the air inlet, and this forms air convection circulation, effectively reduces the temperature in the cavity, simultaneously, still guarantee the insulation of cavity not to reduce, and only need to improve pole shell, further reduce the cost of change, thereby overcome the technical problem of background art, make the product have the advantage of temperature rise control. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a control temperature rise's vacuum circuit breaker's structure schematic view of the utility model;

[0014] Fig. 2 It is a bottom structure schematic view of the utility model of control temperature rise's vacuum circuit breaker;

[0015] Fig. 3 It is a side cross section structure schematic view of the utility model of control temperature rise's vacuum circuit breaker;

[0016] Fig. 4 It is a cross section structure schematic view of the utility model of control temperature rise's vacuum circuit breaker;

[0017] The corresponding relationship between the annotations of each drawing and the component names in the drawing is as follows:

[0018] Sign: 1, pole shell;2, cavity;3, air duct;4, air inlet;5, heat dissipation hole;6, upper outgoing line end;7, lower outgoing line end;8, mounting base;31, flow guide part;81, positioning column;82, screw hole. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0020] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms such as "upper", "lower", "left", "right" is the orientation or position relationship shown based on the drawing, only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0021] In the embodiments of the utility model, "and / or" is merely a description of the association relationship of the associated objects, and indicates that three relationships can exist, for example, A and / or B can indicate that A exists alone, A and B exist simultaneously, and B exists alone.

[0022] Reference example Figs. 1 to 4 A vacuum circuit breaker for controlling temperature rise, comprising a pole shell 1, the pole shell 1 is provided with a cavity 2, the cavity 2 is provided with an air duct 3 between the shell, the sidewall of the bottom of the air duct 3 is provided with a plurality of equal-interval air inlet holes 4 from bottom to top, the sidewall of the top of the air duct 3 is provided with a plurality of equal-interval heat dissipation holes 5 from top to bottom, when the fixed sealed pole is running, the hot air is heated to small density and rises, the heat is conducted to the top of the air duct 3 through the cavity 2, and is discharged from the heat dissipation hole 5, the surrounding cold air fills into the air duct 3 from the air inlet hole 4, so that air convection circulation is formed, the temperature in the cavity 2 is effectively reduced, meanwhile, the insulation of the cavity 2 is ensured not to be reduced, and only the pole shell 1 needs to be improved, thereby reducing the modification cost.

[0023] It is worth mentioning that the upper outgoing line end 6 is arranged above the pole shell 1, and the lower outgoing line end 7 is arranged below the pole shell 1, and the upper outgoing line end 6 and the lower outgoing line end 7 are electrically connected with the electrical equipment;

[0024] It is worth mentioning that the bottom of the pole shell 1 is provided with a mounting base 8, four corners of the mounting base 8 are provided with positioning columns 81, the positioning columns 81 are provided with threaded holes 82, the positioning columns 81 help the mounting base 8 to be quickly positioned on the specified position of the base of the vacuum circuit breaker, play the anti-stupid role, the threaded holes 82 are connected and fixed with the fastening screws of the base, so that the mounting base 8 is connected and fixed with the base.

[0025] It is worth mentioning that the inlet of the air duct 3 is arranged at the bottom of the mounting base 8, the inlet of the air duct 3 is provided with a flow guide part 31 expanding to both sides, the air duct 3 is arranged in a semi-ring shape, and a heat dissipation fan can also be arranged at the inlet of the air duct 3, the flow guide part 31 helps to introduce more air flow blown out by the heat dissipation fan, accelerates the air flow speed in the air duct 3, further improves the heat dissipation effect, and the semi-ring shape increases the heat conduction area of the cavity 2.

[0026] The above design scheme can realize the advantage of controlling temperature rise.

[0027] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the utility model specific implementation is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A vacuum circuit breaker for controlling temperature rise, comprising a pole housing (1), characterized in that: The pole housing (1) is provided with a cavity (2), and an air duct (3) is provided between the cavity (2) and the housing. The side wall at the bottom of the air duct (3) is provided with several equally spaced air inlets (4) from bottom to top, and the side wall above the air duct (3) is provided with several equally spaced heat dissipation holes (5) from top to bottom.

2. The vacuum circuit breaker for controlling temperature rise according to claim 1, characterized in that: The upper part of the pole housing (1) is provided with an upper wire outlet (6), and the lower part of the pole housing (1) is provided with a lower wire outlet (7).

3. The vacuum circuit breaker for controlling temperature rise according to claim 2, characterized in that: The bottom of the pole housing (1) is provided with a mounting base (8), and the four corners of the mounting base (8) are provided with positioning posts (81), and the positioning posts (81) are provided with threaded holes (82).

4. The vacuum circuit breaker for controlling temperature rise according to claim 3, characterized in that: The inlet of the air duct (3) is located at the bottom of the mounting base (8), and the inlet of the air duct (3) is provided with a drainage section (31) that extends to both sides. The air duct (3) is configured as a semi-circular shape.

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