Insulation protection structure of pole-mounted circuit breaker body

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an insulation protection structure of a pole-mounted circuit breaker body, which comprises a mechanism box, a pole and a vacuum arc extinguish chamber. The vacuum arc-extinguishing chamber covers the upper end part of the pole; one end of the static contact extends into the vacuum arc-extinguishing chamber; the moving contact is arranged in the vacuum arc-extinguishing chamber in an axial sliding manner; the shielding cylinder is coaxially sleeved on the inner wall of the vacuum arc-extinguishing chamber; a plurality of arc extinguishing plates are axially arranged on the inner wall of the shielding cylinder at intervals; the phase-change radiator is attached to and wraps the vacuum arc-extinguishing chamber; the baffle ring is fixed on the moving contact; the spring is sleeved on the moving contact, and two ends of the spring are respectively abutted against the vacuum arc-extinguishing chamber and the baffle ring. By improving the insulation protection structure of the pole-mounted circuit breaker body, the pole-mounted circuit breaker has the advantages that the heat dissipation speed is high, the service life of the insulation layer is prolonged, and the use safety is improved, so that the problems and defects in the prior art and equipment are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and more specifically, to an insulation protection structure for the on-column circuit breaker body. Background Technique

[0002] The on-column circuit breaker is a switching device installed on a power pole, used to automatically cut off the power supply during a power failure to protect the safety of equipment and personnel. It has overload protection and short-circuit protection functions. The on-column circuit breaker usually consists of an arc extinguishing chamber, an operating mechanism, an insulating part, etc.

[0003] The working principles of different types of circuit breakers are different; among them, the vacuum circuit breaker uses a vacuum environment to achieve arc extinguishing. When the vacuum environment is damaged, the generated arc cannot be quickly extinguished, which is prone to danger. At the same time, the insulating layer on the arc extinguishing chamber side is heated more concentratedly, which is prone to aging.

[0004] In view of this, research and improvement are carried out on the existing problems, and an insulation protection structure for the on-column circuit breaker body is provided, aiming to solve the problems and improve the practical value through this technology. Content of the Utility Model

[0005] The purpose of the utility model is to provide an insulation protection structure for the on-column circuit breaker body to solve the problems and deficiencies mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides an insulation protection structure for the on-column circuit breaker body, which is achieved by the following specific technical means:

[0007] The insulation protection structure for the on-column circuit breaker body includes: a mechanism box, a pole column, a vacuum arc extinguishing chamber, a static contact, an upper outgoing line, a moving contact, a lower outgoing line, a shielding cylinder, an arc extinguishing plate, a phase-changing radiator, a retaining ring, a spring, an insulating pull rod, an evaporation shell, a condensation shell, and a working medium; the pole column is fixed above the mechanism box; the vacuum arc extinguishing chamber is covered on the upper end of the pole column; one end of the static contact extends into the vacuum arc extinguishing chamber, and the other end of the static contact penetrates the pole column and is connected to the upper outgoing line; the moving contact is axially slidably arranged in the vacuum arc extinguishing chamber, and the lower part of the moving contact is connected to the lower outgoing line; the shielding cylinder is coaxially sleeved on the inner wall of the vacuum arc extinguishing chamber; the arc extinguishing plates are axially spaced at multiple positions on the inner wall of the shielding cylinder; the phase-changing radiator is attached and wrapped around the outside of the vacuum arc extinguishing chamber; the retaining ring is fixed on the moving contact; the spring is sleeved on the moving contact, and both ends of the spring are respectively abutted against the vacuum arc extinguishing chamber and the retaining ring; the insulating pull rod connects the moving contact and the mechanism box; the phase-changing radiator includes an evaporation shell and a plurality of condensation shells that communicate with each other; the working medium is filled in the evaporation shell and the condensation shells.

[0008] As a further optimization of this technical solution, the insulating and protecting structure of the pole-mounted circuit breaker body of the present utility model has multiple sets of condensation shells arranged in an array, and the cross-section of the condensation shell is in the shape of the English letter "V".

[0009] As a further optimization of this technical solution, the arc extinguishing plate of the insulating and protecting structure of the pole-mounted circuit breaker body of the present utility model is in an annular plate shape.

[0010] As a further optimization of this technical solution, the pole column of the insulating and protecting structure of the pole-mounted circuit breaker body of the present utility model is made of epoxy resin casting.

[0011] As a further optimization of this technical solution, the working medium of the insulating and protecting structure of the pole-mounted circuit breaker body of the present utility model is preferably ethylene glycol.

[0012] As a further optimization of this technical solution, the phase-changing radiator of the insulating and protecting structure of the pole-mounted circuit breaker body of the present utility model is made of cermet.

[0013] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0014] 1. The phase-changing radiator of the present utility model is arranged to fit and wrap around the outside of the vacuum arc extinguishing chamber. The working medium in the phase-changing radiator evaporates, absorbs the heat generated in the vacuum arc extinguishing chamber, improves the heat dissipation speed of the vacuum arc extinguishing chamber, increases the heat dissipation area at the same time, and reduces the influence of heat concentration on the service life of the insulating layer.

[0015] 2. The arc extinguishing plates of the present utility model are axially spaced at multiple positions on the inner wall of the shielding cylinder. When the vacuum arc extinguishing chamber loses vacuum, the arc extinguishing plates play a role in quickly extinguishing the arc, improving the safety of device use.

[0016] 3. Through the improvement of the insulating and protecting structure of the pole-mounted circuit breaker body, the present utility model has the advantages of fast heat dissipation speed, extended service life of the insulating layer, and improved use safety, thus effectively solving the problems and deficiencies in the prior art and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 is the overall structure schematic diagram of the present utility model;

[0019] Figure 2 is the cross-sectional structure schematic diagram of the present utility model;

[0020] Figure 3This is a schematic diagram of the partial structure of the present utility model.

[0021] In the figure: mechanism box 1, pole column 2, vacuum interrupter 3, static contact 4, upper outgoing line 5, moving contact 6, lower outgoing line 7, shielding cylinder 8, arc extinguishing plate 9, phase-changing radiator 10, retaining ring 11, spring 12, insulating pull rod 13, evaporation housing 101, condensation housing 102, working medium 103. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Please refer to Figures 1 to 3 , and the present utility model provides a specific technical implementation solution for the insulation protection structure of the pole-mounted circuit breaker body:

[0024] The insulation protection structure of the pole-mounted circuit breaker body includes: mechanism box 1, pole column 2, vacuum interrupter 3, static contact 4, upper outgoing line 5, moving contact 6, lower outgoing line 7, shielding cylinder 8, arc extinguishing plate 9, phase-changing radiator 10, retaining ring 11, spring 12, insulating pull rod 13, evaporation housing 101, condensation housing 102, working medium 103; the pole column 2 is fixed above the mechanism box 1; the pole column 2 is made of epoxy resin casting; the vacuum interrupter 3 is coated on the upper end of the pole column 2; one end of the static contact 4 extends into the vacuum interrupter 3, and the other end of the static contact 4 penetrates the pole column 2 and is connected to the upper outgoing line 5; the moving contact 6 is axially slidably arranged in the vacuum interrupter 3, and the lower part of the moving contact 6 is connected to the lower outgoing line 7; the shielding cylinder 8 is coaxially sleeved on the inner wall of the vacuum interrupter 3 to protect the inner wall of the vacuum interrupter 3; the arc extinguishing plates 9 are axially spaced at multiple positions on the inner wall of the shielding cylinder 8; the arc extinguishing plates 9 are in a ring-shaped plate structure; when the vacuum interrupter 3 loses vacuum, the arc extinguishing plates 9 divide the arc into short arcs, making it extinguish quickly and improving the safety of the device; the phase-changing radiator 10 is attached and wrapped outside the vacuum interrupter 3; the phase-changing radiator 10 is made of cermet and plays a role in heat dissipation; the retaining ring 11 is fixed on the moving contact 6; the spring 12 is sleeved on the moving contact 6, and the two ends of the spring 12 are respectively abutted against the vacuum interrupter 3 and the retaining ring 11, and the spring 12 makes the moving contact 6 and the static contact 4 separate quickly; the insulating pull rod 13 connects the moving contact 6 and the mechanism box 1.

[0025] The phase-change radiator 10 includes an evaporation housing 101 and a plurality of condensation housings 102 that are interconnected; the condensation housings 102 are arranged in an array at multiple locations, and the cross-section of the condensation housing 102 is in the shape of the English letter "V", which facilitates the reflux of the condensing working fluid 103 and at the same time increases the heat dissipation area; the working fluid 103 is filled in the evaporation housing 101 and the condensation housing 102; the working fluid 103 is preferably ethylene glycol; the working fluid 103 in the phase-change radiator 10 evaporates and absorbs heat, absorbing the heat generated in the vacuum interrupter 3, increasing the heat dissipation speed of the vacuum interrupter 3, at the same time increasing the heat dissipation area, and reducing the influence of heat concentration on the life of the insulating layer.

[0026] Specific implementation steps:

[0027] During use, when the insulating pull rod 13 drives the moving contact 6 to move downward and separate from the static contact 4, the high vacuum in the vacuum interrupter 3 extinguishes the arc. When the vacuum interrupter 3 leaks air, the arc extinguishing plate 9 divides the long arc into short arcs, causing it to extinguish quickly; the heat generated by the arc extinguishing is transferred to the evaporation housing 101, the working fluid 103 evaporates and absorbs heat, the steam enters the condensation housing 102 and is cooled into a liquid, and flows back into the evaporation housing 101, and so on to cool the vacuum interrupter 3 in a cycle.

[0028] In summary: The insulation protection structure of the pole-mounted circuit breaker body, through the setting that the phase-change radiator 10 of the present invention is attached and wrapped around the outside of the vacuum interrupter 3, the working fluid in the phase-change radiator 10 evaporates, absorbs the heat generated in the vacuum interrupter 3, increases the heat dissipation speed of the vacuum interrupter 3, at the same time increases the heat dissipation area, and reduces the influence of heat concentration on the life of the insulating layer; through the setting that the arc extinguishing plates 9 are axially spaced at multiple locations on the inner wall of the shielding cylinder 8, when the vacuum interrupter 3 loses vacuum, the arc extinguishing plates 9 play a role in quickly extinguishing the arc, improving the safety of the device during use; through the improvement of the insulation protection structure of the pole-mounted circuit breaker body, the present invention has the advantages of fast heat dissipation speed, extending the life of the insulating layer, and improving the safety during use, thus effectively solving the problems and deficiencies in the prior art and equipment.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Insulation protection structure of the pole-mounted circuit breaker body, comprising: Mechanism box (1), pole column (2), vacuum interrupter (3), static contact (4), upper outgoing line (5), moving contact (6), lower outgoing line (7), shielding cylinder (8), arc extinguishing plate (9), phase-changing radiator (10), retaining ring (11), spring (12), insulating pull rod (13), evaporation housing (101), condensation housing (102), working fluid (103); It is characterized in that: the pole column (2) is fixed above the mechanism box (1); the vacuum interrupter (3) is covered on the upper end of the pole column (2); one end of the static contact (4) extends into the vacuum interrupter (3), and the other end of the static contact (4) penetrates the pole column (2) and is connected to the upper outgoing line (5); the moving contact (6) is axially slidably arranged in the vacuum interrupter (3), and the lower part of the moving contact (6) is connected to the lower outgoing line (7); the shielding cylinder (8) is coaxially sleeved on the inner wall of the vacuum interrupter (3); the arc extinguishing plates (9) are axially spaced at multiple positions on the inner wall of the shielding cylinder (8); the phase-changing radiator (10) is attached and wrapped outside the vacuum interrupter (3); the retaining ring (11) is fixed on the moving contact (6); the spring (12) is sleeved on the moving contact (6), and both ends of the spring (12) are respectively abutted against the vacuum interrupter (3) and the retaining ring (11); the insulating pull rod (13) connects the moving contact (6) and the mechanism box (1); the phase-changing radiator (10) includes an evaporation housing (101) and a plurality of condensation housings (102) that communicate with each other; the working fluid (103) is filled in the evaporation housing (101) and the condensation housings (102).

2. The insulation protection structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The condensation housings (102) are arranged in an array at multiple positions, and the cross-section of the condensation housing (102) is in the shape of the English letter "V".

3. The insulation protection structure of the pole-mounted circuit breaker body according to claim 1, wherein: The arc extinguishing plate (9) is in an annular plate structure.

4. The insulation protection structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The pole column (2) is made of epoxy resin casting.

5. The insulation protection structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The working fluid (103) is preferably ethylene glycol.

6. The insulation protection structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The phase-changing radiator (10) is made of cermet.

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