A solid-enclosed pole for an indoor vacuum circuit breaker

Abstract

This utility model discloses a solid-sealed pole of an indoor vacuum circuit breaker. The solid-sealed pole of the indoor vacuum circuit breaker includes a pole body, in which a heat-conducting sleeve is provided. The inner wall of the heat-conducting sleeve is evenly distributed with a plurality of equally spaced heat-conducting parts around its axis to absorb heat from the vacuum interrupter and related conductive parts of the circuit breaker. The outer wall of the heat-conducting sleeve is provided with a plurality of equally spaced heat-dissipating parts from bottom to top and protrudes from the outer wall of the pole body. The heat-dissipating parts have inclined upward extensions on both sides. The heat is conducted to the heat of the conductive parts through the heat-conducting parts, increasing the air contact area and improving the heat exchange efficiency; the extensions guide the airflow, and the ventilation holes form a chimney effect to promote heat exchange; the hole walls increase the heat dissipation surface area, enhance heat conduction, effectively control the temperature rise, and improve the stability and durability of the equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker technology, and in particular to a solid-sealed pole of an indoor vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers are named for their high-vacuum nature, which is both the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They are characterized by their small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing, making them widely used in power distribution networks. Vacuum circuit breakers are indoor power distribution devices in 3-10kV, 50Hz three-phase AC systems, used in industrial and mining enterprises, power plants, and substations for the protection and control of electrical equipment. They are particularly suitable for applications requiring oil-free operation, minimal maintenance, and frequent operation. Circuit breakers can be installed in medium-voltage switchgear, double-layer switchgear, and fixed switchgear for the control and protection of high-voltage electrical equipment.

[0003] Embedding the vacuum interrupter and related conductive parts of the circuit breaker into an easily curable solid insulating material such as epoxy resin to form a pole, making the entire circuit breaker pole a single integrated component, is called a solid-sealed pole. During the closing process of the vacuum interrupter, the moving and stationary contacts come into contact with each other and conduct current, generating a large amount of heat. However, the solid-sealed pole has poor heat dissipation efficiency, leading to heat accumulation, which in turn affects the service life of the vacuum interrupter and the circuit breaker. To solve this problem, the applicant proposes an improved design to optimize the thermal management capability of the pole and improve the operational stability and durability of the equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned vacuum circuit breaker design and to provide a product that controls temperature rise and improves the stability and durability of equipment operation.

[0005] A solid-sealed pole of an indoor vacuum circuit breaker includes a pole body, a heat-conducting sleeve inside the pole body, and a plurality of equally spaced heat-conducting parts evenly distributed on the inner wall of the heat-conducting sleeve with the sleeve as the axis, for absorbing heat from the vacuum interrupter and related conductive parts of the circuit breaker; the outer wall of the heat-conducting sleeve has a plurality of equally spaced heat-dissipating parts from bottom to top and protrudes from the pole body, and the heat-dissipating parts have inclined upward extensions on both sides.

[0006] Preferably, the heat dissipation section and the extension section are provided with at least one ventilation hole.

[0007] Preferably, the electrode body has conductive parts at the top and bottom, and the electrode body has a cavity for accommodating a heat-conducting sleeve, and the cavity has a through hole for the heat-conducting part to pass through.

[0008] Preferably, the thermally conductive sleeve has a notch to avoid the conductive part.

[0009] Preferably, the heat-conducting part has a contact surface that adheres to the conductive part, and thermally conductive silicone grease is provided between the contact surface and the conductive part. Beneficial effects

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a heat-conducting section to transfer heat generated by conductive components to a heat dissipation section and an extension section, increasing the contact area with air and improving heat exchange efficiency. The extension section guides the air after one heat exchange in an orderly manner, allowing it to contact adjacent extension sections and continue heat exchange, thus fully utilizing the cold air. Under natural air cooling conditions, the ventilation hole structure creates a chimney effect, causing hot air to rise and be discharged, while cold air is replenished from the lower heat dissipation section and extension section. The hole wall structure further increases the effective heat dissipation surface area and enhances heat conduction capacity. The overall design achieves effective control of the temperature of conductive components and the vacuum interrupter, thereby improving the stability and durability of the equipment operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the solid-sealed pole of an indoor vacuum circuit breaker according to the present invention; Figure 2 This utility model Figure 1 A partially enlarged view A of the solid-sealed pole of an indoor vacuum circuit breaker; Figure 3 This is an exploded structural diagram of the solid-sealed pole of an indoor vacuum circuit breaker according to the present invention. The correspondence between the labels and component names in the attached figures is as follows: Reference numerals: 1. Pole post body; 2. Heat-conducting sleeve; 11. Conductive part; 12. Cavity; 13. Through hole; 21. Heat-conducting part; 22. Heat-dissipating part; 23. Extension part; 24. Ventilation hole; 25. Notch; 211. Contact surface. Detailed Implementation

[0012] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0015] Reference example Figures 1 to 3 A solid-sealed pole of an indoor vacuum circuit breaker includes a pole body 1, a heat-conducting sleeve 2 inside the pole body 1, and a plurality of equally spaced heat-conducting parts 21 evenly distributed on the inner wall of the heat-conducting sleeve 2 with the sleeve as the axis, for absorbing heat from the vacuum interrupter and related conductive parts of the circuit breaker; a plurality of equally spaced heat dissipation parts 22 are provided on the outer wall of the heat-conducting sleeve 2 from bottom to top and protrude from the outer wall of the pole body 1, and inclined upward extensions 23 are provided on both sides of the heat dissipation parts 22. By setting the heat-conducting part 21, the heat generated by the conductive parts is conducted to the heat dissipation part 22 and the extension part 23, increasing the contact area with air and improving the heat exchange efficiency. The extension part 23 guides the air after one heat exchange in an orderly manner, so that it contacts the adjacent extension part 23 and continues to exchange heat, realizing the full utilization of cold air. Under natural air cooling conditions, the ventilation hole 24 structure forms a chimney effect, which promotes the hot air to rise and be discharged, while cold air is replenished from the lower heat dissipation part 22 and the extension part 23. The hole wall structure further increases the effective heat dissipation surface area and enhances the heat conduction capacity. The overall design realizes the effective control of the temperature of the conductive parts and the vacuum interrupter, thereby improving the operational stability and durability of the equipment. It is worth mentioning that the heat dissipation part 22 and the extension part 23 are provided with at least one ventilation hole 24; It is worth mentioning that conductive parts 11 are provided at the top and bottom of the electrode body 1, and a cavity 12 is provided inside the electrode body 1 to accommodate the heat-conducting sleeve 2. The cavity 12 is provided with a through hole 13 for the heat-conducting part 21 to pass through. It is worth mentioning that the heat-conducting sleeve 2 is provided with a notch 25 to avoid the conductive part 11, and the material of the heat-conducting sleeve 2 can be copper or aluminum. It is worth mentioning that the heat-conducting part 21 is provided with a contact surface 211 that fits against the conductive parts. Thermal grease is applied between the contact surface 211 and the conductive parts. The contact surface 211 adopts an arc-shaped structure to increase the contact area with the conductive parts. The thermal grease is filled between the contact surface 211 and the conductive parts to further reduce the contact thermal resistance and improve the heat conduction efficiency. The thermal grease has electrical insulation properties, which effectively blocks the current conduction path from the contact surface 211 to the heat dissipation part 22, ensuring the overall electrical performance of the solid-sealed electrode. This structure improves heat dissipation efficiency while taking into account electrical safety, and achieves synergistic optimization of thermal management and insulation performance.

[0016] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A solid-stuffed pole for an indoor vacuum circuit breaker comprising a pole body (1), characterized in that: The pole body (1) is provided with a heat-conducting sleeve (2). The inner wall of the heat-conducting sleeve (2) is provided with a number of equally spaced heat-conducting parts (21) evenly distributed around its axis, which are used to absorb the heat of the vacuum interrupter and the related conductive parts of the circuit breaker. The outer wall of the heat-conducting sleeve (2) is provided with a number of equally spaced heat dissipation parts (22) from bottom to top, and protrudes from the outer wall of the pole body (1). The heat dissipation parts (22) are provided with inclined upward extensions (23) on both sides.

2. The stationary pole of an indoor vacuum circuit breaker according to claim 1, characterized in that: The heat dissipation part (22) and the extension part (23) are provided with at least one ventilation hole (24).

3. The solid-sealed pole of the indoor vacuum circuit breaker according to claim 1, characterized in that: The electrode body (1) has conductive parts (11) at the top and bottom, and the electrode body (1) has a cavity (12) for accommodating the heat-conducting sleeve (2), and the cavity (12) has a through hole (13) for the heat-conducting part (21) to pass through.

4. The solid-sealed pole of the indoor vacuum circuit breaker according to claim 3, characterized in that: The heat-conducting sleeve (2) is provided with a notch (25) to avoid the conductive part (11).

5. The stationary pole of an indoor vacuum circuit breaker according to claim 1, characterized in that: The heat-conducting part (21) is provided with a contact surface (211) that fits the conductive part, and thermal grease is provided between the contact surface (211) and the conductive part.

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