CN212257287U

CN212257287U - Ceramic arc extinguishing structure

Info

Publication number: CN212257287U
Application number: CN202020731065.4U
Authority: CN
Inventors: 周康平
Original assignee: Churod Electronics Co ltd
Current assignee: Zhonghui Sensata Technology Wuhu Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-29
Anticipated expiration: 2030-05-07
Also published as: WO2021223347A1

Abstract

The utility model provides a ceramic arc extinguishing structure, this ceramic arc extinguishing structure includes: a ceramic housing and at least two electrical conductors. The ceramic shell is a hollow cuboid structure with an opening at one side, and each conductor part is inserted into a conductive hole and clamped with the ceramic shell. The inner side wall of the ceramic shell is provided with a plurality of reinforcing ribs and a plurality of arc cutting ribs. A plurality of arc cutting grooves are uniformly arranged on the inner side wall of the ceramic shell. The arc ribs are cut to divide the arc in the ceramic shell, and the arc is quickly extinguished after being divided by the cutting ribs. The surface area of the inner side wall of the ceramic shell is increased by the aid of the arc cutting ribs and the arc cutting grooves, namely, the cooling area of the ceramic shell to the electric arc is increased, and the electric arc is rapidly extinguished in the ceramic shell. The structural strength of the ceramic shell is enhanced by the plurality of arc cutting ribs. The ceramic arc extinguishing structure has a good arc extinguishing effect, and the working stability of the relay comprising the ceramic arc extinguishing structure is improved.

Description

Ceramic arc extinguishing structure

Technical Field

The utility model relates to a relay arc extinguishing field especially relates to a ceramic arc extinguishing structure.

Background

The relay is an automatic switch element with an isolation function, is widely applied to remote control, remote measurement, communication, automatic control, electromechanical integration and power electronic equipment, and is one of the most important control elements. Relays are used as automatic switches in electrical circuits to reliably switch the electrical circuits on and off. When the contact is cut off, an arc is generated due to the load applied to the contact. If the electric arc can extinguish fast, the service life of the relay can be greatly prolonged. In some door relays, such as high-voltage direct-current relays, ceramic materials are often used, and the high-temperature resistance of the ceramic materials is utilized to cool an electric arc, so that the extinguishing speed of the electric arc is increased. However, the existing ceramic arc extinguishing structure has unsatisfactory arc extinguishing effect.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a ceramic arc extinguishing structure to solve the technical problem that the existing ceramic arc extinguishing structure is not ideal in arc extinguishing effect.

A ceramic arc extinguishing structure, the ceramic arc extinguishing structure comprising: a ceramic housing and at least two electrical conductors;

the ceramic shell is of a hollow cuboid structure with an opening at one side, at least two conductive holes are formed in the bottom of the ceramic shell and penetrate through the ceramic shell, the conductive holes are matched with the conductive bodies, and each conductive body part is inserted into one conductive hole and connected with the ceramic shell; a plurality of reinforcing ribs and a plurality of arc cutting ribs are arranged on the inner side wall of the ceramic shell; a plurality of arc cutting grooves are uniformly formed in the inner side wall of the ceramic shell; and the reinforcing ribs are arranged on the two inner side walls with larger area of the ceramic shell.

In one embodiment, each arc cutting rib is symmetrically arranged on two inner side walls with larger area of the ceramic shell.

In one embodiment, each arc cutting rib is symmetrically arranged on two inner side walls with smaller area of the ceramic shell.

In one embodiment, each of the arc cutting ribs is parallel to the width direction of the ceramic shell.

In one embodiment, each of the arc cutting ribs is parallel to the height direction of the ceramic shell.

In one embodiment, each of the ribs is parallel to a height direction of the ceramic case.

In one embodiment, each arc cutting groove is arranged between two arc cutting ribs.

In one embodiment, the corners of each reinforcing rib are rounded.

In one embodiment, the edge angle of each arc cutting rib is a rounded angle.

In one embodiment, the inner side wall of the arc cutting groove is provided with the arc cutting rib.

Above-mentioned ceramic arc extinguishing structure increases ceramic case's structural strength through a plurality of strengthening ribs that set up on ceramic case inside wall. Electric arcs in the ceramic shell are cut apart through a plurality of arc cutting ribs arranged on the inner side wall of the ceramic shell, and the electric arcs are rapidly extinguished after being cut apart by the arc cutting ribs. A plurality of arc cutting ribs that set up on the ceramic casing inside wall have increased the surface area of ceramic casing inside wall on the one hand, have increased the cooling area of ceramic casing to electric arc promptly, simultaneously, cut apart into a plurality of sections with electric arc, have changed the volt-ampere characteristic curve of electric arc, help electric arc to extinguish in ceramic casing fast. On the other hand, the plurality of arc cutting ribs increase the structural strength of the ceramic shell, and are beneficial to forming and size control. Furthermore, the surface area of the inner side wall of the ceramic shell is increased by the arc cutting grooves formed in the inner side wall of the ceramic shell, the cooling area of the ceramic shell to the electric arc is further increased, and the electric arc can be quickly extinguished in the ceramic shell. The ceramic arc extinguishing structure has a good arc extinguishing effect, and the working reliability and durability of the relay can be greatly improved.

Drawings

FIG. 1 is a schematic diagram of a ceramic arc quenching structure according to one embodiment;

FIG. 2 is a schematic view of another perspective of the ceramic arc extinguishing structure of the embodiment of FIG. 1;

FIG. 3 is a schematic view of another perspective of the ceramic arc extinguishing structure of the embodiment of FIG. 1;

FIG. 4 is a schematic diagram of a ceramic arc quenching structure according to one embodiment;

FIG. 5 is a schematic diagram of a ceramic arc quenching structure according to another embodiment;

fig. 6 is a schematic structural diagram of a ceramic arc extinguishing structure in yet another embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, the present invention provides a ceramic arc extinguishing structure 10, wherein the ceramic arc extinguishing structure 10 includes: a ceramic housing 100 and at least two electrical conductors 200. In the present embodiment, the ceramic case 100 is an alumina ceramic case. The ceramic shell 100 is a hollow cuboid structure with an opening on one side, at least two conductive holes 101 are formed in the bottom of the ceramic shell 100, the conductive holes 101 penetrate through the ceramic shell 100, the conductive holes 101 are matched with the conductive bodies 200, and each conductive body 200 is partially inserted into one conductive hole 101 and clamped with the ceramic shell 100. The inner side wall of the ceramic shell 100 is provided with a plurality of reinforcing ribs 110 and a plurality of arc cutting ribs 120. In the present embodiment, each of the cut ribs 120 is parallel to the height direction of the ceramic case 100. Referring to fig. 5, in another embodiment, each of the cut ribs 120 is parallel to the width direction of the ceramic shell 100. In this embodiment, the edges of the ribs 110 are rounded, and the edges of the arc cutting ribs 120 are rounded. The ribs 110 are provided on both inner side walls of the ceramic case 100 having a large area. Further, each rib 110 is parallel to the height direction of the ceramic case 100. A plurality of arc cutting grooves 102 are uniformly formed on the inner side wall of the ceramic shell 100. In the present embodiment, each arc cutting groove 102 is opened between two arc cutting ribs 120. Further, the inner side wall of the arc cutting groove 102 is provided with an arc cutting rib 120. The arc cutting ribs 120 arranged on the inner side wall of the arc cutting groove 102 further increase the structural strength of the ceramic shell 100 on one hand, and further increase the cooling area of the ceramic shell 100 to the arc on the other hand.

The ceramic arc extinguishing structure 10 increases the structural strength of the ceramic case 100 by providing the plurality of ribs 110 on the inner wall of the ceramic case 100. The arc in the ceramic case 100 is divided by the plurality of arc cutting ribs 120 provided on the inner sidewall of the ceramic case 100, and the arc is easily extinguished in the ceramic case 100 after being divided by the arc cutting ribs 120. A plurality of arc muscle 120 of cutting that set up on the ceramic casing 100 inside wall have increased the surface area of ceramic casing 100 inside wall on the one hand, have increased the cooling area of ceramic casing 100 to electric arc promptly, and simultaneously, a plurality of arc muscle 120 of cutting cut into a plurality of sections with electric arc, have changed the volt-ampere characteristic curve of electric arc, help electric arc to extinguish in ceramic casing 100 fast. On the other hand, the plurality of arc ribs 120 increase the structural strength of the ceramic shell 100, which is beneficial to forming and size control. Further, the surface area of the inner side wall of the ceramic shell 100 is increased by the plurality of arc cutting grooves 102 formed in the inner side wall of the ceramic shell 100, the cooling area of the ceramic shell 100 for the electric arc is further increased, meanwhile, the electric arc is divided into a plurality of sections by the plurality of arc cutting grooves 102, the volt-ampere characteristic curve of the electric arc is changed, and the electric arc can be extinguished fast in the ceramic shell 100. The ceramic arc extinguishing structure 10 has a good arc extinguishing effect, and the working stability of a relay comprising the ceramic arc extinguishing structure 10 is improved.

In order to improve the arc cutting effect of the arc cutting ribs 120 in the ceramic shell 100, in one embodiment, the arc cutting ribs 120 are symmetrically disposed on two inner sidewalls of the ceramic shell 100 with a larger area. Referring to fig. 5, in another embodiment, the arc cutting ribs 120 are symmetrically disposed on two inner sidewalls of the ceramic shell 100 with a smaller area. Further, referring to fig. 6, in another embodiment, the arc cutting ribs 120 are uniformly disposed on all inner sidewalls of the ceramic shell 100, so as to further increase the structural strength of the ceramic shell 100, further increase the cooling area of the ceramic shell 100 for the arc, and facilitate the arc to be rapidly extinguished in the ceramic shell 100. Thus, the cutting effect of each arc cutting rib 120 on the arc in the ceramic case 100 is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A ceramic arc quenching structure, comprising: a ceramic housing and at least two electrical conductors;

2. The ceramic arc extinguishing structure of claim 1, wherein each arc cutting rib is symmetrically arranged on two inner side walls with larger area of the ceramic shell.

3. The ceramic arc extinguishing structure of claim 1, wherein each arc cutting rib is symmetrically arranged on two inner side walls with smaller area of the ceramic shell.

4. The ceramic arc extinguishing structure of claim 1, wherein each of the arc cutting ribs is parallel to a width direction of the ceramic case.

5. The ceramic arc extinguishing structure of claim 1, wherein each of the arc cutting ribs is parallel to a height direction of the ceramic shell.

6. The ceramic arc extinguishing structure of claim 1, wherein each of the ribs is parallel to a height direction of the ceramic case.

7. The ceramic arc extinguishing structure of claim 1, wherein each arc cutting groove is opened between two arc cutting ribs.

8. The ceramic arc extinguishing structure of claim 1, wherein the corners of each of the ribs are rounded.

9. The ceramic arc extinguishing structure of claim 1, wherein the corners of each arc cutting rib are rounded.

10. The ceramic arc extinguishing structure of claim 1, wherein the arc cutting ribs are disposed on inner side walls of the arc cutting grooves.