End tab structure of contactor

Abstract

The utility model relates to a run-on plate structure of a contactor, which comprises a shell, a static contact and a run-on plate are arranged in the shell, an arc extinguishing chamber is arranged at one end of the static contact, an arc extinguishing grid plate group is arranged in the arc extinguishing chamber, and the run-on plate is connected to one side of the static contact. The run-on plate comprises a connecting part horizontally extending outwards at the outer side edge of the static contact, an inclined part horizontally connected with the connecting part and inclined upwards, and a bent part horizontally connected with the connecting part and bent downwards. According to the utility model, the outward extending part and the inclined part of the run-on plate jointly form a longer arc moving path, so that the arc can be driven by an electromagnetic field more sufficiently and can move outwards to the arc extinguish chamber quickly and stably, thereby remarkably improving the extinguishing efficiency of the arc and improving the service life of the arc extinguish chamber. Strong electromagnetic fields can be generated on the two sides of the upper end and the lower end of the run-on plate, and the enhanced electromagnetic fields are beneficial to guiding the movement of the electric arc and lengthening the electric arc, so that the reburning and diffusion of the electric arc are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to an arc guide plate structure of a contactor. Background Art

[0002] In power systems and electrical equipment, contactors, as important switching elements, are widely used in various control circuits. The arc guide plates of traditional contactor static contacts often adopt the "b" type or "u" type structures. Although these two structures play a role in arc guiding and enhancing the electromagnetic field to a certain extent, there are still some deficiencies. Specifically, the "b" type structure enhances the electromagnetic field through a closed loop and an outer extension part, and guides the arc to move outward. However, during the movement of the arc, there is a phenomenon of transient reduction in magnetic field intensity, which is not conducive to the rapid extinction and movement of the arc. The "u" type structure enhances the electromagnetic field through its opening type design and blows the arc outward. However, due to the lack of extension at its upper end part, the arc may stop prematurely during the movement, resulting in insufficient arc movement distance and reduced arc extinguishing efficiency. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide an arc guide plate structure of a contactor with strong arc extinguishing efficiency, stable and reliable performance, and high safety.

[0004] To achieve the above purpose, the utility model adopts such an arc guide plate structure of a contactor, which includes a housing. A static contact and an arc guide plate are arranged inside the housing. An arc extinguishing chamber is arranged at one end of the static contact. An arc extinguishing grid plate group is arranged inside the arc extinguishing chamber. The arc guide plate is connected to one side of the static contact. The arc guide plate includes a connecting part horizontally extending outward from the outer edge of the static contact, an inclined part horizontally connected to the connecting part and inclined upward, and a bent part horizontally connected to the connecting part and bent downward.

[0005] Compared with the prior art, the beneficial effects of the above structure are as follows: The outer extension part of the arc guide plate and the inclined part together constitute a longer arc movement path, enabling the arc to be more fully driven by the electromagnetic field, quickly and stably move outward into the arc extinguishing chamber, thereby significantly improving the arc extinguishing efficiency. Moreover, strong electromagnetic fields can be generated on both sides of the upper and lower ends of the arc guide plate. This enhanced electromagnetic field not only helps to guide the movement of the arc but also elongates the arc, effectively preventing the reignition and diffusion of the arc, and further improving the safety and reliability of the contactor.

[0006] The present utility model is further configured such that an included angle is formed between the inclined portion and the connecting portion, and a certain gap is maintained between the upper end of the inclined portion and the arc extinguishing grid plate group in the arc extinguishing chamber. The included angle formed between the inclined portion and the connecting portion can more precisely control the movement path of the arc from the contact to the arc extinguishing chamber, reducing the deviation and jitter of the arc during movement, ensuring that the arc can move smoothly along a predetermined trajectory. The gap between the inclined portion and the arc extinguishing grid plate group allows cold air or a cooling medium to enter, more effectively cool the arc, and also promote the splitting and diffusion of the arc.

[0007] The present utility model is further configured such that the static contact includes a static contact point and a body portion. One end of the body portion has a guiding portion extending forward, and the other end of the body portion has a hook portion formed by lifting and folding back at the end of the guiding portion. The static contact point is connected to one end of the hook portion, and the bending portion is fixedly connected to the guiding portion. The static contact point and the body portion are integrally formed, improving the overall structural strength of the contact, reducing the risk of loosening or breaking due to the connection of different components. The bending portion being fixedly connected to the guiding portion provides additional support for the overall structure of the static contact. Description of the Drawings

[0008] Figure 1 is a schematic structural view of the static contact of the embodiment of the present utility model.

[0009] Figure 2 is a schematic structural view of the static contact and the arc ignition plate of the embodiment of the present utility model.

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

[0011] Figure 4 is a schematic structural view inside the arc extinguishing chamber seat of the embodiment of the present utility model.

[0012] Figure 5 is a side view of the static contact, the arc ignition plate and the arc extinguishing grid plate group of the embodiment of the present utility model. Detailed Embodiment

[0013] Such as Figures 1-5As shown in the figure, an embodiment of the present utility model provides an arc guide plate structure of a contactor, which includes a housing 1. Inside the housing 1, there are a static contact 2 and an arc guide plate 3. The static contact 2 includes a static contact point 21 and a body part 22. One end of the body part 22 has a guiding part 221 extending forward, and the other end has a hook part 222 formed by lifting and folding back at the end of the guiding part 221. The static contact point 21 is connected to the top of the hook part 222. An arc extinguishing chamber 4 is provided at the upper end of the static contact 2. Inside the arc extinguishing chamber 4, there is an arc extinguishing grid group 41 for extinguishing the arc when the contact is disconnected. The arc guide plate 3 is connected to one side of the static contact 2, and includes a connecting part 31 horizontally extending outward from the outer edge of the static contact 2, an inclined part 32 horizontally connected to the connecting part 31 and inclined upward, and a bent part 33 horizontally connected to the connecting part 31 and bent downward. The bent part 33 is fixedly connected to the guiding part 221. An angle is formed between the inclined part 32 and the connecting part 31, and there is a certain gap between the upper end of the inclined part 32 and the arc extinguishing grid group 41 inside the arc extinguishing chamber 4.

[0014] And the housing 1 is composed of multiple components. 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 4 is located inside the arc extinguishing chamber seat 13, and the static contact 2 and the arc guide plate 3 are located inside the pedestal 12.

[0015] It should be noted that only one group of the arc guide plate structure is detailedly marked in the drawings, but the whole structure actually includes six groups, and the layout and structure of each group of the arc guide plate structure are the same as those in the detailed description.

[0016] Of course, in addition to the above embodiments, the present utility model can also have other various embodiments. Without departing from the substantial 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. An arc-striking plate structure of a contactor, comprising a housing, wherein a stationary contact and an arc-striking plate are arranged in the housing, an arc-extinguishing chamber is arranged at one end of the stationary contact, and an arc-extinguishing grid group is arranged in the arc-extinguishing chamber, characterized in that: The arc-starting plate is connected to one side of the stationary contact, and includes a connecting portion extending horizontally outward from the outer edge of the stationary contact, an inclined portion horizontally connected to the connecting portion and inclined upward, and a bent portion horizontally connected to the connecting portion and bent downward.

2. The arc-starting plate structure of the contactor according to claim 1, characterized in that: An angle is formed between the inclined portion and the connecting portion, and a certain gap is maintained between the upper end of the inclined portion and the arc extinguishing grid group in the arc extinguishing chamber.

3. The arc-starting plate structure of the contactor according to claim 1 or 2, characterized in that: The stationary contact includes a stationary contact point and a main body portion, one end of the main body portion has a guide portion extending forward, the other end of the main body portion has a hook portion formed by being raised and folded back at the end of the guide portion, the stationary contact point is connected to one end of the hook portion, and the bent portion is fixedly connected to the guide portion.

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