Arc extinguish chamber structure

Abstract

The utility model relates to the technical field of electric appliances, and provides an arc extinguish chamber structure. Comprising a first shell and a second shell which are oppositely arranged, and a split combination part which jointly form a hollow arc extinguishing cavity, the plurality of arc extinguishing grid layers are alternately arranged in the arc extinguishing cavity to form a continuously turning arc path so as to prolong the arc moving distance, and are connected through the inclined grid arms; the arc guide assembly includes a first guide at the bottom of the housing and a second guide between the first guide and the inclined grid arm. The first guiding piece generates directional airflow under the effect of arc heat energy, and the arc is driven to move, be segmented and be extinguished along a steering path. According to the utility model, a continuous steering arc path is constructed through the split type shell and the multilayer grids, and the arc is driven to move and divide by combining the directional airflow generated by the arc guide assembly, so that the arc extinguishing efficiency and the working reliability of the arc extinguish chamber are improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical technology, and specifically refers to an arc-extinguishing chamber structure. Background Technology

[0002] As a core component of electrical equipment such as circuit breakers and contactors, the arc-extinguishing chamber's primary function is to effectively extinguish electric arcs during circuit switching, ensuring the safe and reliable operation of the equipment. In power systems, if the electric arc between contacts cannot be extinguished in time when switching equipment disconnects a circuit, it can lead to serious problems such as contact erosion, insulation breakdown, or even equipment explosion. Through a rationally designed internal structure, the arc-extinguishing chamber can rapidly dissipate arc energy and suppress arc reignition, thereby ensuring the stable operation of electrical equipment under both normal operation and fault conditions. It is a key technical unit for ensuring the safe operation of power systems.

[0003] Currently, traditional arc-extinguishing chamber structures generally suffer from technical bottlenecks such as a single arc path and low extinguishing efficiency. For example, some arc-extinguishing chambers use flat grids or simple layered structures, allowing the arc to move only in a straight line with a limited path length and a slow energy dissipation rate. When the arc enters the arc-extinguishing chamber, due to the lack of effective steering guidance and airflow drive, the arc is difficult to be quickly segmented and cooled, leading to prolonged arc extinguishing time and even arc retention causing contact welding. Furthermore, while some arc-extinguishing chambers incorporate gas-generating materials, the controllability of the gas generation direction is insufficient, failing to create a synergistic effect between directional airflow and the arc path. This makes the arc prone to backlash or deviation during movement, further reducing extinguishing efficiency. In addition, existing arc-resistant guiding components often use a single material, making it difficult to balance thermal conductivity and insulation. This results in the arc energy not being quickly dissipated through heat conduction and may cause localized overheating due to thermal feedback, affecting the long-term reliability of the arc-extinguishing chamber. The aforementioned problems are particularly prominent in high-frequency operation or high-current interruption scenarios, and there is an urgent need to achieve multi-dimensional optimization of the arc path and a significant improvement in arc extinguishing efficiency through structural innovation. Utility Model Content

[0004] This invention constructs a continuously directional arc path through a split shell assembly and a multi-layer arc-extinguishing mesh layer. Combined with the directional airflow generated by the arc guiding assembly, it drives the arc movement and segmentation, thereby improving the arc extinguishing efficiency and the operational reliability of the arc-extinguishing chamber, thus alleviating the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: an arc-extinguishing chamber structure, comprising:

[0006] The split-type housing assembly includes a first housing and a second housing disposed opposite to each other, and a split joint connecting the two to form a hollow arc-extinguishing cavity;

[0007] A three-dimensional arc extinguishing assembly includes multiple layers of arc extinguishing grids arranged alternately in an arc extinguishing cavity, each grid layer forming a continuously turning arc path to extend the arc travel distance, and inclined grid arms connected to the arc extinguishing grid layers.

[0008] An arc guiding assembly includes a first guide member disposed at the bottom of a first housing and a second housing, and a second guide member disposed between the first guide member and an inclined grid arm;

[0009] The first guide element generates a directional airflow under the action of the electric arc's thermal energy, driving the electric arc to move, split, and extinguish along a continuously changing arc path.

[0010] The present invention is further configured such that the first guide is made of any one of polyoxymethylene, polyamide or melamine resin.

[0011] The present invention is further configured such that the arc-extinguishing grid layer includes a first arc-inducing space and a second arc-inducing space, and the first arc-inducing space and the second arc-inducing space are arranged alternately from left to right to force the arc direction to change multiple times.

[0012] The present invention is further configured such that the second guide is nested within the first guide, and its inner wall is provided with spaced grid receiving ribs to fix the inclined grid arm.

[0013] The present invention is further configured such that the side walls of the first housing and the second housing are provided with inclined guide grooves, and the inclined guide grooves are engaged with the positioning protrusions provided at the ends of the arc-extinguishing grid layer.

[0014] The present invention is further configured such that the second guide is made of a gradient composite material, wherein the side closer to the first guide is a high thermal conductivity layer and the side farther away is a high insulation layer.

[0015] The present invention is further configured such that the split joint includes a first connecting rod disposed on the first housing and detachably connected to the second housing, and a second connecting rod disposed on the second housing and detachably connected to the first housing.

[0016] The present invention is further configured such that the arc guiding assembly includes an arc guide member connected to the housing, and the arc guide member is provided with an arc-shaped guide plate.

[0017] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0018] 1. By combining the multi-layered alternating arrangement of the arc-extinguishing grid layer with the directional airflow generated by the arc guiding component, the arc is forced to move along a continuously turning path and change direction multiple times, thereby extending the arc's movement distance and accelerating energy dissipation, significantly improving the arc extinguishing efficiency.

[0019] 2. By utilizing the connection structure between the inclined grid arm and the arc-extinguishing grid layer, combined with the driving effect of directional airflow on the arc, the arc is divided into multiple segments and guided to the arc-inducing space of each grid layer. Through the synergistic effect of spatial deflection and airflow blowing arc, the arc is quickly segmented and cooled down, thereby improving the reliability of arc extinguishing.

[0020] 3. Through the synergistic effect of the arc-shaped guide plate of the arc guide and the directional airflow, the arc is provided with guiding constraint when it moves to the end, which suppresses the backlash phenomenon caused by airflow turbulence, ensures that the arc is completely extinguished along the preset path, and improves the stability of the arc extinguishing process. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a perspective view of the present invention;

[0023] Figure 3 This is a schematic diagram of the arc-extinguishing mesh layer of this utility model;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the arc guiding component of this utility model;

[0025] Figure 5 This is a utility model Figure 1 A schematic diagram of the cross-sectional structure.

[0026] The reference numerals in the figure are as follows: 1. Split shell assembly; 10. First shell; 11. Second shell; 12. Split joint; 120. First connecting rod; 121. Second connecting rod; 2. Three-dimensional arc extinguishing assembly; 20. Arc extinguishing grid layer; 200. First arc induction space; 201. Second arc induction space; 21. Inclined grid arm; 3. Arc guiding assembly; 30. First guide; 31. Second guide; 310. Grid receiving rib; 32. Arc guide; 320. Arc-shaped guide plate; 4. Inclined guide groove; 5. Positioning protrusion. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0028] Example 1:

[0029] This embodiment provides an arc-extinguishing chamber structure, including:

[0030] The split-type housing assembly 1 includes a first housing 10 and a second housing 11 disposed opposite to each other, and a split joint 12 connecting the two to form a hollow arc-extinguishing cavity;

[0031] The three-dimensional arc extinguishing component 2 includes multiple layers of arc extinguishing grids 20 arranged alternately in the arc extinguishing cavity, each grid forming a continuously turning arc path to extend the arc travel distance, and inclined grid arms 21 connected to the arc extinguishing grids 20.

[0032] The arc guiding assembly 3 includes a first guide 30 disposed at the bottom of each housing, and a second guide 31 disposed between the first guide 30 and the inclined grid arm 21;

[0033] The first guide 30 generates a directional airflow under the action of the electric arc's thermal energy, driving the electric arc to move, split, and extinguish along a continuously changing electric arc path.

[0034] The split-type shell assembly 1 is a hollow cavity structure formed by two opposing first shells 10 and second shells 11 connected by a split joint 12. It is the basic support frame of the arc extinguishing chamber to construct a closed arc extinguishing chamber and provide a space for arc extinguishing.

[0035] The first housing 10 and the second housing 11 each constitute part of the split housing assembly 1, together forming an arc-extinguishing cavity. The first housing 10 and the second housing 11 are semi-cavity structures arranged opposite each other, such as semi-cylindrical or semi-cubic prisms. The first housing 10 and the second housing 11 are detachably connected to the opposite housing through structures such as the split joint 12.

[0036] The split joint 12 connects the first housing 10 and the second housing 11 together to form a complete hollow arc-extinguishing chamber. The split joint 12 ensures a tight connection between the housings, prevents gas leakage in the arc-extinguishing chamber, ensures the stability of the arc-extinguishing process, and improves the sealing of the arc-extinguishing process.

[0037] The three-dimensional arc-extinguishing assembly 2 is mainly used to extinguish electric arcs by extending the arc's travel distance and segmenting the arc, thereby accelerating the dissipation of arc energy. The three-dimensional arc-extinguishing assembly 2 consists of multiple alternating arc-extinguishing grid layers 20 and inclined grid arms 21 connected to the arc-extinguishing grid layers 20. The three-dimensional arc-extinguishing assembly 2 has a three-dimensional structure; the arc-extinguishing grid layers 20 have wavy or zigzag shapes, and the inclined grid arms 21 form a certain inclination angle after connecting to the arc-extinguishing grid layers 20. The three-dimensional arc-extinguishing assembly 2 is located within the arc-extinguishing cavity formed by the split-type shell assembly 1.

[0038] The arc-extinguishing grid layer 20 is used to form a continuously changing arc path, forcing the arc to change direction multiple times, extending the arc's travel distance, and accelerating the dissipation of arc energy. The arc-extinguishing grid layer 20 has a grid structure, and its shape can be wavy, zigzag, etc. The bending directions of adjacent layers may be different, forming an alternating arrangement within the arc-extinguishing cavity.

[0039] The inclined grid arm 21 connects to the arc-extinguishing grid layer 20 and guides the arc to move in a specific direction, working in conjunction with the arc-extinguishing grid layer 20 to achieve arc segmentation and energy dissipation. The inclined grid arm 21 is a rod-shaped or plate-shaped structure, connected to the arc-extinguishing grid layer 20 at a certain inclination angle. The inclined grid arm 21 is connected to the arc-extinguishing grid layer 20 and is inclined towards the first guide member 30 and the second guide member 31. The inclined grid arm 21 and the arc-extinguishing grid layer 20 can be connected by welding, riveting, or other methods.

[0040] The arc guiding assembly 3 is used to guide the movement direction of the arc, creating favorable conditions for the extinguishing of the arc. The arc guiding assembly 3 consists of a first guide 30 located at the bottom of each housing and a second guide 31 located between the first guide 30 and the inclined grid arm 21.

[0041] The first guide element 30 generates a directional airflow under the action of the electric arc's thermal energy, driving the electric arc to move, split, and extinguish along a continuously changing arc path. The first guide element 30 is typically a block or strip structure, and its shape may be rectangular, circular, etc. The first guide element 30 can be fixed to the bottom of the housing by means of adhesive bonding, snap-fit, or other methods.

[0042] The second guide 31 is used to fix the inclined grid arm 21, and at the same time accelerates the dissipation of electric arc energy and blocks the heat feedback path through heat conduction. The second guide 31 is a block-shaped or strip-shaped structure nested within the first guide 30.

[0043] Example 2:

[0044] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] The first guide 30 is made of any one of polyoxymethylene, polyamide or melamine resin.

[0046] In this embodiment, the first guide element 30 is made of any one of polyoxymethylene, polyamide, or melamine resin, with the aim of precisely utilizing arc energy to achieve efficient arc extinguishing. Because these polymers have low thermal decomposition temperatures, once an arc is generated, they can rapidly decompose to produce gas, quickly forming a directional airflow. This airflow can rapidly drive the arc to move, allowing it to enter the continuously turning path within the three-dimensional arc extinguishing component 2 more quickly, extending its movement distance, accelerating energy dissipation, and thus significantly improving arc extinguishing efficiency. This ensures that an effective arc extinguishing mechanism can be activated the instant an arc is generated during circuit opening and closing, guaranteeing the safe and stable operation of electrical equipment.

[0047] Example 3:

[0048] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] The arc-extinguishing grid layer 20 includes a first arc-inducing space 200 and a second arc-inducing space 201. The first arc-inducing space 200 and the second arc-inducing space 201 are arranged alternately to force the arc direction to change multiple times.

[0050] The first arc-inducing space 200 and the second arc-inducing space 201 work together to divide the arc into multiple small segments, making it easier to extinguish and improving the arc-extinguishing efficiency and reliability of the arc-extinguishing chamber under different operating conditions. These are spatial regions naturally formed by the curved shape of the arc-extinguishing grid layer 20. The first arc-inducing space 200 and the second arc-inducing space 201 appear alternately in each grid layer. The first arc-inducing space 200 and the second arc-inducing space 201 may be crescent-shaped or irregular arc-shaped regions. Viewed from the cross-section of the arc-extinguishing chamber, they are arranged sequentially along the width of the grid layer, and in adjacent grid layers, the positions of the induced spaces intersect, forming a continuously turning arc path.

[0051] Example 4:

[0052] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] The second guide 31 is nested inside the first guide 30, and its inner wall is provided with spaced grid receiving ribs 310 to fix the inclined grid arm 21.

[0054] The grid receiving rib 310 provides precise positioning and stable connection points for the inclined grid arm 21, ensuring that the inclined grid arm 21 does not shift or sway during arc extinguishing, thereby maintaining the overall structural stability of the three-dimensional arc extinguishing assembly 2 and ensuring that the arc can move along a preset path. The grid receiving rib 310 is a rib-like structure protruding on the inner wall of the second guide 31, and its shape and size match the end of the inclined grid arm 21 to achieve a tight fit. The grid receiving rib 310 is integrally formed with the second guide 31, and is spaced apart on the inner wall of the second guide 31, and is connected to the inclined grid arm 21 by an embedded fit.

[0055] Example 5:

[0056] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] The side walls of the first housing 10 and the second housing 11 are provided with inclined guide grooves 4, which are engaged with the positioning protrusions 5 located at the ends of the arc-extinguishing grid layer 20.

[0058] The purpose of this embodiment is to achieve precise positioning and stable installation of the arc-extinguishing grid layer 20 within the arc-extinguishing chamber. The interlocking fit between the inclined guide groove 4 and the positioning protrusion 5 guides the arc-extinguishing grid layer 20 to be installed quickly and accurately to the predetermined position, reducing installation errors and ensuring the parallelism and spacing uniformity between each arc-extinguishing grid layer 20, thus ensuring the consistency and stability of the arc path. Simultaneously, this connection method effectively resists the impact force of the arc and the force of the generated gas flow during the operation of the arc-extinguishing chamber, preventing displacement and shaking of the arc-extinguishing grid layer 20, maintaining a continuously changing arc path, creating reliable conditions for efficient arc extinguishing, thereby improving the overall performance and reliability of the arc-extinguishing chamber and ensuring the stable operation of electrical equipment.

[0059] Example 6:

[0060] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] The second guide 31 is made of gradient composite material, with a high thermal conductivity layer on the side closer to the first guide 30 and a high insulation layer on the side farther away.

[0062] In this embodiment, the second guide 31 is designed using a gradient composite material. A high thermal conductivity layer is provided near the first guide 30, and a high insulation layer is provided away from it. The main purpose is to optimize thermal management during the arc extinguishing process. The high thermal conductivity layer can quickly dissipate the heat generated by the arc and transferred to the second guide 31, accelerating the dissipation of arc energy, reducing the arc temperature, promoting faster extinguishing, and improving arc extinguishing efficiency. The high insulation layer effectively blocks the heat feedback path, preventing the dissipated heat from being transferred back to the first guide 30, avoiding affecting the performance of the gas-generating material, ensuring the stability of the gas-generating process, and preventing heat from spreading to other parts of the arc extinguishing chamber, avoiding thermal damage to surrounding components. Thus, the reliability and stability of the arc extinguishing chamber under the action of the arc are comprehensively improved, ensuring the safe operation of electrical equipment.

[0063] Example 7:

[0064] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] The split-joint part 12 includes a first connecting rod 120 disposed on the first housing 10 and detachably connected to the second housing 11, and a second connecting rod 121 disposed on the second housing 11 and detachably connected to the first housing 10.

[0066] The first connecting rod 120 and the second connecting rod 121 work together to tightly connect the first housing 10 and the second housing 11 together, forming a stable arc-extinguishing cavity structure. Both the first connecting rod 120 and the second connecting rod 121 are cylindrical rods. One end of the first connecting rod 120 is fixedly connected to the first housing 10 by welding, riveting, or integral molding to ensure the connection strength with the first housing 10. The other end is detachably connected to the second housing 11 by threads or snap-fits. One end of the second connecting rod 121 is fixedly connected to the second housing 11, and the other end is detachably connected to the first housing 10, with the connection method being the same as that of the first connecting rod 120.

[0067] Example 8:

[0068] This embodiment provides an arc-extinguishing chamber structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0069] The arc guiding assembly also includes an arc guide 32 disposed between the first housing 10 and the second housing 11, and the arc guide 32 is provided with an arc-shaped guide plate 320.

[0070] The arc guide 32 guides the movement of the arc and works in conjunction with the directional airflow generated by the first guide 30 to prevent arc backlash and ensure smooth arc extinguishing. The main structure of the arc guide 32 is typically a plate-like or block-like component with an arc-shaped guide plate 320 on it. The overall shape of the arc guide 32 is adapted to the internal structure of the arc-extinguishing chamber, and it is positioned outside the outermost arc-extinguishing grid layer 20. It can be firmly connected to the first housing 10 and the second housing 11 through welding, bolting, or other methods to ensure its stable position during the arc extinguishing process.

[0071] The arc-shaped guide plate 320 provides a specific flow path for the electric arc and airflow, guiding them to move in a predetermined direction and preventing the arc from flowing in the opposite direction. The arc-shaped guide plate 320 is arc-shaped and is positioned along the direction in which the electric arc and airflow need to be guided. The arc-shaped guide plate 320 and the electric arc guide member 32 are integrally formed.

[0072] When an electric arc is generated in the arc-extinguishing chamber, the first guide member 30 generates a directional airflow under the thermal energy of the arc. Driven by the airflow, the arc moves along a continuously changing arc path formed by multiple arc-extinguishing grid layers 20, undergoing multi-layer segmentation and energy dissipation. When the arc reaches the last arc-extinguishing grid layer 20, it continues to be propelled by the airflow into the arc-shaped guide groove of the arc guide member 32. The arc-shaped guide groove guides the arc and airflow along a specific arc-shaped path, allowing the arc to be smoothly discharged from the arc-extinguishing chamber and preventing the arc from flowing back into the arc-extinguishing chamber, thereby achieving the purpose of suppressing arc backlash.

[0073] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An arc quenching chamber structure, characterized by ,include: The split-type housing assembly (1) includes a first housing (10) and a second housing (11) disposed opposite to each other, and a split joint (12) connecting the two to form a hollow arc-extinguishing cavity; The three-dimensional arc extinguishing component (2) includes multiple layers of arc extinguishing grids (20) arranged alternately in the arc extinguishing cavity, each grid forming a continuously turning arc path to extend the arc movement distance, and inclined grid arms (21) connected to the arc extinguishing grids (20). The arc guiding assembly (3) includes a first guide (30) disposed at the bottom of the first housing (10) and the second housing (11), and a second guide (31) disposed between the first guide (30) and the inclined grid arm (21); The first guide (30) generates a directional airflow under the action of the electric arc heat energy, driving the electric arc to move, split and extinguish along the continuously turning electric arc path.

2. An arc quenching chamber structure according to claim 1, characterized in that The first guide (30) is made of any one of polyoxymethylene, polyamide or melamine resin.

3. An arc quenching chamber structure according to claim 1, characterized in that The arc-extinguishing grid layer (20) includes a first arc-inducing space (200) and a second arc-inducing space (201). The first arc-inducing space (200) and the second arc-inducing space (201) are arranged alternately on the left and right sides, which forces the arc direction to change multiple times.

4. An arc quenching chamber structure according to claim 1, characterized in that The second guide (31) is nested inside the first guide (30), and its inner wall is provided with spaced grid receiving ribs (310) to fix the inclined grid arm (21).

5. An arc quenching chamber structure as claimed in claim 1, wherein, The side walls of the first housing (10) and the second housing (11) are provided with inclined guide grooves (4), and the inclined guide grooves (4) are engaged with the positioning protrusions (5) located at the end of the arc extinguishing grid layer (20).

6. An arc quenching chamber structure as claimed in claim 1, wherein, The second guide (31) is made of gradient composite material, with a high thermal conductivity layer on the side closer to the first guide (30) and a high insulation layer on the side farther away.

7. An arc quenching chamber structure as claimed in claim 1, wherein The split joint (12) includes a first connecting rod (120) disposed on the first housing (10) and detachably connected to the second housing (11), and a second connecting rod (121) disposed on the second housing (11) and detachably connected to the first housing (10).

8. An arc quenching chamber structure as claimed in claim 1, wherein, The arc guiding assembly further includes an arc guide (32) disposed between the first housing (10) and the second housing (11), and the arc guide (32) is provided with an arc-shaped guide plate (320).

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