Circuit breaker base

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker base. Comprising a main body which comprises a mounting cavity; the mounting cavity comprises an arc extinguishing mounting groove, and a plurality of uniformly distributed heat dissipation holes are formed in the main body walls on the two sides of the arc extinguishing mounting groove; upper and lower ends of the heat dissipation holes penetrate through the main body surface; the upper end and the lower end of the heat dissipation hole respectively penetrate through the surface of the main body, so that an air channel can be constructed; external cold air can naturally enter the holes, efficiently absorb high-temperature heat generated by working of the arc extinguish chamber and then is discharged, the temperature of an inner cavity of the arc extinguish chamber is effectively reduced, the situation that the insulation performance of an arc extinguish medium is reduced due to high temperature is avoided, the arc extinguish efficiency of the arc extinguish chamber is guaranteed, and the service life of the arc extinguish chamber is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breakers, and in particular to a circuit breaker base. Background Technology

[0002] In power systems and various electrical equipment, the arc-extinguishing chamber, as the core arc-extinguishing element, directly determines the operational safety and reliability of the equipment. When electrical equipment experiences faults such as short circuits or overloads, the arc-extinguishing chamber must quickly extinguish the high-temperature arc generated between the contacts. During this process, the arc-extinguishing chamber itself generates a large amount of heat due to the release of arc energy. If this heat cannot be dissipated in time, the temperature inside the arc-extinguishing chamber will continue to rise, which will not only reduce the insulation performance and arc-extinguishing efficiency of the arc-extinguishing medium, but may also cause problems such as deformation of the arc-extinguishing chamber shell and sealing failure, thereby affecting the service life of the entire electrical equipment and even inducing safety accidents.

[0003] In summary, the existing main structure for arc-extinguishing chamber installation has obvious defects in heat dissipation structure and cannot fully meet the high-performance requirements of modern electrical equipment for long-term stable operation of arc-extinguishing chambers. There is an urgent need for a design scheme for the main structure of arc-extinguishing chamber installation that can significantly improve heat dissipation efficiency while ensuring structural strength. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a circuit breaker base with good heat dissipation performance.

[0005] In view of this, the present invention provides a circuit breaker base, comprising:

[0006] The main body includes the mounting cavity;

[0007] The mounting cavity includes an arc-extinguishing mounting groove, and several evenly distributed heat dissipation holes are formed on the main body walls on both sides of the arc-extinguishing mounting groove.

[0008] The heat dissipation holes extend through the surface of the main body at both the top and bottom.

[0009] Furthermore, a support plate is provided in the middle of the heat dissipation holes.

[0010] Furthermore, heat dissipation holes are arranged on both sides of the main body.

[0011] Furthermore, a heat dissipation plate is located between the heat dissipation holes, and the top of the heat dissipation plate has a stepped surface.

[0012] Furthermore, it also includes:

[0013] The shaft mounting groove has a U-shaped structure and an inward flange.

[0014] Furthermore, it also includes:

[0015] Mounting holes are located on the main body wall, and a heat dissipation channel communicating with the heat dissipation hole is provided on one side of the mounting holes.

[0016] There is at least one intake passage and one exhaust passage.

[0017] The beneficial effects of this utility model are:

[0018] 1. The design of the heat dissipation holes of this utility model, with their upper and lower ends penetrating the surface of the main body, creates an air channel. Outside cold air can naturally enter the holes, efficiently absorb the high-temperature heat generated during the operation of the arc-extinguishing chamber, and then dissipate it, effectively reducing the internal temperature of the arc-extinguishing chamber. This prevents the insulation performance of the arc-extinguishing medium from deteriorating due to high temperatures, ensuring the arc-extinguishing efficiency of the arc-extinguishing chamber and extending its service life.

[0019] 2. This utility model utilizes the surface of the support plate itself as an additional heat dissipation carrier, further expanding the heat dissipation area, enhancing the heat dissipation effect, and alleviating the problem of high temperature accumulation around the arc-extinguishing chamber. On the other hand, the support plate can provide structural support for the heat dissipation holes, dispersing the thermal stress generated by the main body wall under high temperature conditions, preventing the main body wall from deforming due to thermal expansion and contraction, thereby ensuring the dimensional stability of the arc-extinguishing installation groove, preventing the arc-extinguishing chamber from loosening due to deformation of the installation groove, ensuring that the arc-extinguishing chamber is always in the optimal working position, and maintaining the stable operation of the circuit breaker. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the mounting cavity direction of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the mounting cavity of this utility model from the opposite direction;

[0022] Figure 3 This is a schematic diagram of the position and structure of the support plate of this utility model.

[0023] The markings in the diagram are as follows:

[0024] 1. Main body; 2. Mounting cavity; 3. Arc extinguishing mounting groove; 4. Heat dissipation hole; 5. Support plate; 6. Stepped surface; 7. Heat dissipation plate; 8. Shaft mounting groove; 9. Flange; 10. Mounting hole; 11. Heat dissipation channel. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] Example 1:

[0027] This embodiment provides a circuit breaker base, including:

[0028] Main body 1, the main body 1 includes mounting cavity 2;

[0029] The mounting cavity 2 includes an arc-extinguishing mounting groove 3, and several evenly distributed heat dissipation holes 4 are formed on the walls of the main body 1 on both sides of the arc-extinguishing mounting groove 3.

[0030] The heat dissipation holes 4 penetrate the surface of the main body 1 at the top and bottom.

[0031] The main body 1 has a U-shaped cross-section. The recessed part of the U-shaped structure is the mounting cavity 2. The mounting cavity 2 is provided with mounting slots for mounting various components, including the arc-extinguishing mounting slot 3 for mounting the arc-extinguishing chamber. The two sides of the main body 1 are the walls of the main body 1, which are located on both sides of the arc-extinguishing mounting slot 3. The heat dissipation hole 4 has a square structure, which has a larger heat dissipation area than a circular one. The upper and lower ends of the heat dissipation hole 4 penetrate the surface of the main body 1, so that the internal space of the heat dissipation hole 4 can be easily circulated with air to achieve heat dissipation.

[0032] The main body adopts a U-shaped cross-section structure, and the resulting concave mounting cavity can provide suitable accommodation space for the arc-extinguishing chamber and other components. It can not only provide lateral protection for the components, reducing the corrosion of the components by external dust and impurities, but also ensure the accurate positioning of each component after installation through the limiting effect of the cavity wall. This avoids problems such as poor contact or functional failure caused by component displacement during circuit breaker operation, and provides a structural foundation for the stable operation of the core components of the circuit breaker.

[0033] Compared to traditional circular heat dissipation holes, the planar structure of square heat dissipation holes maximizes the effective space of the main body wall, significantly increasing the heat dissipation contact area. Simultaneously, the design of the upper and lower ends penetrating the main body surface creates air channels. Outside cool air can naturally enter the holes, efficiently absorb the high-temperature heat generated during the operation of the arc-extinguishing chamber, and then be discharged, effectively reducing the internal temperature of the arc-extinguishing chamber. This prevents the insulation performance of the arc-extinguishing medium from deteriorating due to high temperatures, ensuring the arc-extinguishing efficiency of the arc-extinguishing chamber and extending its service life.

[0034] A support plate 5 is provided in the middle of the heat dissipation hole 4.

[0035] A support plate 5 is provided in the middle of the heat dissipation hole 4, which can increase the heat dissipation area and enhance the structural stability of the heat dissipation hole 4, preventing deformation due to high temperature.

[0036] The support plate design in the middle of the heat dissipation holes has dual technical value: on the one hand, the surface of the support plate itself can serve as an additional heat dissipation carrier, further expanding the heat dissipation area, enhancing the heat dissipation effect, and alleviating the problem of high temperature accumulation around the arc-extinguishing chamber; on the other hand, the support plate can provide structural support for the heat dissipation holes, disperse the thermal stress generated by the main body wall under high temperature conditions, prevent the main body wall from deforming due to thermal expansion and contraction, thereby ensuring the dimensional stability of the arc-extinguishing installation slot, preventing the arc-extinguishing chamber from loosening due to deformation of the installation slot, ensuring that the arc-extinguishing chamber is always in the optimal working position, and maintaining the stable operation of the circuit breaker.

[0037] Example 2:

[0038] This embodiment provides a circuit breaker base, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] Heat dissipation holes 4 are arranged on both sides of the main body 1.

[0040] The heat dissipation holes 4 are located on the side wall of the main body 1, excluding the arc extinguishing mounting groove 3, to dissipate heat from other locations.

[0041] By extending the heat dissipation holes to the areas on both sides of the main body, excluding the arc-extinguishing mounting slots, heat dissipation coverage can be achieved for all components within the mounting cavity. This not only targets the arc-extinguishing chamber but also effectively dissipates heat generated by other heat-generating components such as contact assemblies and terminals, preventing localized heat accumulation and the formation of high-temperature dead zones. This results in a more uniform temperature distribution within the mounting cavity, improving the overall heat resistance of the circuit breaker, reducing the risk of component aging or failure caused by localized high temperatures, and further ensuring the long-term reliable operation of the circuit breaker.

[0042] Between the heat dissipation holes 4 is a heat dissipation plate 7, and the top of the heat dissipation plate 7 is provided with a stepped surface 6.

[0043] The top surface of the heat sink 7 has a stepped surface 6 to increase the heat dissipation area and connect all the heat dissipation holes 4 to avoid heat concentration.

[0044] The stepped surface design at the top of the heat sink increases its surface area and overcomes the heat concentration problem inherent in traditional flat heat sinks. The gaps between the steps allow adjacent heat dissipation holes to connect, forming multi-path heat diffusion channels. This enables high-temperature air from the arc-extinguishing zone to quickly diffuse towards the edge of the main wall and then escape through the heat dissipation holes, effectively improving heat diffusion efficiency and preventing heat from accumulating in a single area. This further optimizes overall heat dissipation and ensures stable operation of the circuit breaker under high load conditions.

[0045] Also includes:

[0046] The shaft mounting groove 8 has a U-shaped structure and an inward flange 9.

[0047] The shaft mounting groove 8 is located on the inner side of the wall of the main body 1, and the shaft is generally located in the middle of the main body 1. It is used to install the pivot rod of the circuit breaker. The two ends of the pivot rod are provided with circular flanges 9, which cooperate with the flanges 9 of the shaft mounting groove 8 to facilitate quick installation and disassembly.

[0048] The U-shaped mounting groove of the pivot rod, combined with the inwardly positioned flange, enables rapid installation and removal of the pivot rod. During installation, the circular flanges at both ends of the pivot rod precisely mate with the flanges in the mounting groove, allowing for secure installation without additional tools, significantly improving installation efficiency. During removal, only slight force is required to detach the pivot rod, facilitating later maintenance or component replacement. Simultaneously, the limiting function of the flanges prevents axial movement of the pivot rod during operation, ensuring the accuracy of the circuit breaker's opening and closing actions and avoiding operational malfunctions caused by pivot rod displacement.

[0049] Also includes:

[0050] Mounting hole 10 is provided on the wall of the main body 1, and a heat dissipation channel 11 communicating with heat dissipation hole 4 is provided on one side of mounting hole 10.

[0051] The mounting hole 10 is used to fix the circuit breaker cover to the circuit breaker base, and a heat dissipation channel 11 communicating with the heat dissipation hole 4 is provided on the side near the adjacent heat dissipation hole 4. The channel can be groove-shaped or hole-shaped.

[0052] The mounting holes ensure a secure fixation of the circuit breaker cover, guaranteeing a tight seal between the cover and the base and reducing the risk of external impurities entering the mounting cavity. The heat dissipation channel, connecting the mounting holes to the ventilation holes on one side, effectively addresses the issue of heat dissipation blind spots at the cover's fixing point. After the cover is fitted, heat that easily accumulates around the mounting holes can be directed through the ventilation channel to the ventilation holes and then dissipated via air convection. This prevents high temperatures from damaging the mounting hole threads or the cover's connection structure, extending the service life of the connecting components and ensuring the stability of the cover's fixation, preventing loosening due to high-temperature deformation.

[0053] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. A circuit breaker base, characterized in that, include: The main body (1) includes the mounting cavity (2); The mounting cavity (2) includes an arc-extinguishing mounting groove (3), and several evenly distributed heat dissipation holes (4) are formed on the walls of the main body (1) on both sides of the arc-extinguishing mounting groove (3). The heat dissipation holes (4) penetrate the surface of the main body (1) at the top and bottom respectively.

2. A circuit breaker base according to claim 1, characterized in that, A support plate (5) is provided in the middle of the heat dissipation hole (4).

3. A circuit breaker base according to claim 1, characterized in that, Heat dissipation holes (4) are arranged on both sides of the main body (1).

4. A circuit breaker base according to claim 1, characterized in that, Between the heat dissipation holes (4) is a heat dissipation plate (7), and the top of the heat dissipation plate (7) is provided with a stepped surface (6).

5. A circuit breaker base according to claim 1, characterized in that, Also includes: The shaft mounting groove (8) has a U-shaped structure and an inward flange (9).

6. A circuit breaker base according to claim 1, characterized in that, Also includes: Mounting hole (10) is provided on the wall of the main body (1), and a heat dissipation channel (11) communicating with heat dissipation hole (4) is provided on one side of mounting hole (10).

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