Stepped arc extinguishing grid plate of contactor

Abstract

The utility model relates to a step type arc extinguishing grid sheet of a contactor, comprising a housing, contact assemblies and an arc extinguishing chamber arranged in the housing, an arc extinguishing grid sheet group arranged in the arc extinguishing chamber, the arc extinguishing grid sheet group is arranged between the contact assemblies, the contact assemblies comprise a moving contact assembly and a static contact assembly, the moving contact assembly and the static contact assembly are arranged oppositely, and the moving contact assembly and the static contact assembly are arranged oppositely. And the arc extinguishing grid sheet group comprises a plurality of arc extinguishing grid sheets which are arranged in a stepped manner. According to the utility model, the arc extinguishing grid sheets are arranged in a stepped manner, so that the distance of an electric arc entering a grid sheet area is obviously shortened, the electric arc can enter a grid sheet gap more quickly, the extinguishing speed of the electric arc is accelerated, and the electric arc can be transferred to a far-end grid sheet more easily in the moving process due to the stepped arrangement, so that the arc extinguishing efficiency is improved. The arc extinguishing effect of the far-end grid plate is enhanced, the overall arc extinguishing performance is further improved, and when the arc is large, the pressure intensity gradient of the space in the arc extinguishing chamber is increased, so that the arc can quickly move outwards and be extinguished.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a stepped arc extinguishing grid plate of a contactor. Background Art

[0002] In the power system, as an important control component, the contactor is widely used in various electrical equipment and circuits. In the arc extinguishing chamber of the traditional contactor, the arc extinguishing grid plates are usually arranged in a multi-sheet horizontal slit type, that is, multiple arc extinguishing grid plates are arranged in parallel to form multiple horizontal slits. Although this arrangement can divide the arc to a certain extent, it has obvious limitations. Since the upper and lower ends of the arc extinguishing grid plates are arranged flush, it is difficult for the arc to quickly transfer to the distal arc extinguishing grid plate during the movement process, resulting in a poor arc extinguishing effect of the distal grid plate, thus prolonging the arc extinguishing time and reducing the arc extinguishing ability. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a stepped arc extinguishing grid plate of a contactor with a compact structure, convenient installation, high arc extinguishing efficiency and reliable operation.

[0004] To achieve the above purpose, the utility model adopts such a stepped arc extinguishing grid plate of a contactor, which includes a housing. A contact component and an arc extinguishing chamber are arranged in the housing. An arc extinguishing grid plate group is arranged in the arc extinguishing chamber. The arc extinguishing grid plate group is located between the contact components. The contact component includes a moving contact component and a static contact component. The moving contact component and the static contact component are arranged oppositely. The arc extinguishing grid plate group includes a plurality of arc extinguishing grid plates arranged in a stepped manner.

[0005] Compared with the prior art, the beneficial effect of the above structure is that: the distance for the arc to enter the grid plate area is significantly shortened by the stepped arrangement of the arc extinguishing grid plates, so that the arc can enter the grid plate gap faster, thus accelerating the arc extinguishing speed. And the stepped arrangement enables the arc to be more easily transferred to the distal grid plate during the movement process, enhancing the arc extinguishing effect of the distal grid plate and further improving the overall arc extinguishing performance. When there is a larger arc, the pressure gradient in the space of the arc extinguishing chamber increases, which is beneficial to the rapid outward movement of the arc and extinguishing the arc.

[0006] This utility model is further configured such that the static contact assembly includes a static contact disposed at the lower edge of the arc extinguishing grid plate group, an arc guiding plate connected to the static contact, and a side connection plate provided at one end of the static contact. The side connection plate is connected to the housing. The arc extinguishing grid plates are arranged in sequence from left to right, and a gradually decreasing horizontal gap is formed between adjacent arc extinguishing grid plates. Through the design of the arc guiding plate, the arc can be more effectively guided from the static contact to the arc extinguishing grid plate area, ensuring that the arc can quickly enter the grid plate gap. The design of the gradually decreasing horizontal gap formed between adjacent arc extinguishing grid plates causes the arc to be continuously divided and cooled during movement, thereby accelerating the extinction of the arc. The side connection plate firmly connects the static contact assembly to the housing, increasing the structural strength of the entire contact assembly.

[0007] This utility model is further configured such that the housing includes a base, an arc extinguishing chamber seat covering the base, and an arc extinguishing chamber cover covering the arc extinguishing chamber seat. The arc extinguishing chamber is located within the arc extinguishing chamber seat. Card slots for mounting a plurality of stepwise arranged arc extinguishing grid plates are respectively provided opposite to each other on the inner side wall of the arc extinguishing chamber, and the upper ends of the arc extinguishing grid plates extend into the arc extinguishing chamber cover. Through the stacked design of the base, the arc extinguishing chamber seat, and the arc extinguishing chamber cover, it is beneficial to protect the internal contact assembly and arc extinguishing grid plates, and can also resist external impacts and vibrations to a certain extent, ensuring the stable operation of the contactor. Description of the Drawings

[0008] Figure 1 is a schematic structural diagram of the stepwise arc extinguishing grid plate of the contactor according to the embodiment of the present utility model.

[0009] Figure 2 is a schematic structural diagram of the static contact assembly and the arc extinguishing grid plate group according to the embodiment of the present utility model.

[0010] Figure 3 is a schematic structural diagram of the housing according to the embodiment of the present utility model.

[0011] Figure 4 is a schematic diagram of the cooperation between the arc extinguishing chamber seat and the arc extinguishing grid plates according to the embodiment of the present utility model.

[0012] Figure 5 is a schematic structural diagram of the arc extinguishing grid plate group and the arc extinguishing chamber cover according to the embodiment of the present utility model. Detailed Embodiment

[0013] As Figures 1 - 5 shown, the embodiment of the present utility model provides a stepwise arc extinguishing grid plate for a contactor, including a housing 1. A plurality of contact assemblies and corresponding arc extinguishing chambers 2 are provided within the housing 1. An arc extinguishing grid plate group 21 is provided within each arc extinguishing chamber 2. The arc extinguishing grid plate group 21 is located between the contact assemblies and is used to extinguish the generated arc when the contacts are separated. The contact assembly includes a moving contact assembly 3 and a static contact assembly 4. The moving contact assembly 3 and the static contact assembly 4 are arranged opposite to each other to achieve the on-off control of the circuit.

[0014] In particular, the entire structure includes three sets of contact component pairs. Each set of contact component pairs consists of a moving contact component 3 and two static contact components 4 respectively arranged on both sides of the moving contact component 3. An independent arc extinguishing chamber 2 is provided between each moving contact component 3 and the static contact components 4 on its both sides to ensure effective arc extinguishing when the contacts are separated.

[0015] The arc extinguishing grid plate group 21 includes four arc extinguishing grid plates 22 arranged in a stepped manner. The static contact component 4 includes a static contact 41 arranged at the lower edge of the arc extinguishing grid plate group 21, an arc guiding plate 42 connected to the static contact 41, and a side connecting plate 43 arranged at the lower end of the static contact 41. The side connecting plate 43 is connected to the housing 1. The arc extinguishing grid plates 22 are arranged in sequence from left to right, and a gradually decreasing horizontal gap is formed between adjacent arc extinguishing grid plates 22. From the end close to the static contact component 4 to the end far from the static contact component 4, the distance between the lower ends of the arc extinguishing grid plates 22 and the static contact 41 and the arc guiding plate 42 gradually decreases. At the same time, this change in distance also causes the distance between the upper ends of the arc extinguishing grid plates 22 and the static contact 41 and the arc guiding plate 42 to gradually decrease from the maximum. Moreover, the interval formed by the arrangement of the arc extinguishing grid plates 22 is consistent with the natural extension direction of the arc generated by the action of the contact components, which is beneficial to the guidance and extinguishing of the arc. In addition, the interval formed by the arrangement of the arc extinguishing grid plates 22 is also perpendicular to the conductive circuit direction of the contact components, avoiding interference of the arc on the conductive circuit and ensuring the stability and reliability of the contactor when switching the circuit on and off.

[0016] The housing 1 includes a base 11, a pedestal 12 covering the base 11, an arc extinguishing chamber seat 13 covering the pedestal 12, and an arc extinguishing chamber cover 14 covering the arc extinguishing chamber seat 13. The arc extinguishing chamber 2 is located inside the arc extinguishing chamber seat 13. Card slots 23 for mounting four arc extinguishing grid plates 22 arranged in a stepped manner are respectively provided on the inner side walls of the arc extinguishing chamber 2 opposite to each other. The upper ends of the arc extinguishing grid plates 22 extend into the arc extinguishing chamber cover 14. Some components are omitted in the figure, but the structure is complete, and all components are the same.

[0017] It should be noted that only one small group of components are detailedly marked in the attached drawings, but the entire structure actually includes three sets of contact component pairs. The layout and structure of each set of contact component pairs are the same as those in the detailed description. Such a design not only ensures the capacity and flexibility of the contactor but also guarantees its stability and reliability when switching the circuit on and off.

[0018] Of course, in addition to the above embodiments, the present utility model can also have many other embodiments. Without departing from the essential technical solution content of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. And if these changes or deformations are equivalent to the technical solutions in this patent, then these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model.

Claims

1. A stepped arc-extinguishing grid of a contactor, comprising a housing, a contact assembly and an arc-extinguishing chamber arranged in the housing, an arc-extinguishing grid group arranged in the arc-extinguishing chamber, the arc-extinguishing grid group being located between the contact assemblies, the contact assembly comprising a moving contact assembly and a stationary contact assembly, the moving contact assembly being arranged opposite to the stationary contact assembly, characterized in that: The arc-extinguishing grid group includes a plurality of arc-extinguishing grids arranged in a stepped manner.

2. The stepped arc-extinguishing grid of the contactor according to claim 1, characterized in that: The stationary contact assembly includes a stationary contact arranged at the lower edge of the arc extinguishing grid group, an arc striking plate connected to the stationary contact, and a side connecting plate arranged at one end of the stationary contact, wherein the side connecting plate is connected to the shell, and the arc extinguishing grids are arranged in sequence from left to right, and a gradually decreasing transverse gap is formed between adjacent arc extinguishing grids.

3. The stepped arc-extinguishing grid of the contactor according to claim 1 or 2, characterized in that: The shell includes a base, an arc extinguishing chamber seat covered on the base, and an arc extinguishing chamber cover covered on the arc extinguishing chamber seat. The arc extinguishing chamber is located in the arc extinguishing chamber seat. The inner side walls of the arc extinguishing chamber are respectively provided with slots for clamping a plurality of arc extinguishing grids arranged in a stepped manner. The upper ends of the arc extinguishing grids extend in the arc extinguishing chamber cover.

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