Arc extinguishing chamber and circuit breaker

Abstract

The utility model discloses an arc extinguishing chamber and a circuit breaker. The arc extinguishing chamber comprises a module group composed of arc extinguishing grid sheets arranged along the vertical direction, and isolation plates assembled on two sides of the module group. The isolation plate is provided with slots which are in plug-in connection with tenon pieces which are symmetrically arranged at two sides of the arc extinguishing grid sheet. The tenon piece comprises elastic plates symmetrically arranged in the vertical direction, the elastic plates are obliquely arranged, and the distance between the ends of the elastic plates is minimum. The arc extinguishing chamber and the circuit breaker provided by the utility model are simple in structure and convenient and fast to operate, greatly shorten the time spent in assembly, thereby improving the production effect, greatly guarantee the stability after combination, and avoid the situation that problems are solved in the transportation process due to lack of auxiliary fixation of glue.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an arc extinguishing cover and a circuit breaker. Background Art

[0002] The arc extinguishing hood of the circuit breaker is used to control and eliminate the arc generated during the circuit breaker breaking operation. It is composed of a series of metal plates or arc-shaped conductive parts, in which the arc is forced to split into multiple small arcs. Through the action of electromagnetic force and cooling airflow, the arc gradually disappears. In conjunction with the publication (announcement) number: CN111613474A, the publication (announcement) date: 2020-09-01, an arc extinguishing hood for high-speed circuit breakers is disclosed. And, the publication (announcement) number: CN205959933U, the publication (announcement) date: 2017-02-15, an arc extinguishing hood of a circuit breaker is disclosed.

[0003] In the prior art including the above patents, the arc extinguishing hood structure is relatively simple and is a known technology. Therefore, many manufacturers mainly assemble it manually. After the assembly is completed, the joints between the back shell and the arc extinguishing grid are mortise-and-tenoned, and finally the mortise-and-tenon points are sealed for a second time by applying glue. Summary of the invention

[0004] In order to overcome the above technical defects, the purpose of the utility model is to provide an arc extinguishing hood and a circuit breaker to solve the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An arc extinguishing hood comprises a module composed of arc extinguishing grids arranged in a vertical direction, and isolation plates mounted on both sides of the module;

[0007] The isolation plate is provided with slots for plugging into tenons symmetrically arranged on both sides of the arc-extinguishing grid;

[0008] The tenon piece comprises elastic plates which are arranged symmetrically in the vertical direction. The elastic plates are arranged obliquely, and the distance between the ends of the elastic plates is the smallest.

[0009] Preferably, a side edge of the arc-extinguishing grid is provided with a limiting block extending into a notch formed on one adjacent side of the two elastic plates.

[0010] Preferably, the end of the elastic plate is chamfered.

[0011] Preferably, a groove is provided on a side of the elastic plate opposite to the limiting block, and an extension portion is provided on an inner wall of one side of the groove, and a protrusion arranged opposite to the groove is provided at an end of the extension portion.

[0012] Preferably, the extension portion and the protrusion portion are frame structures.

[0013] Preferably, the cross-section of the extension portion is an isosceles trapezoidal structure.

[0014] Preferably, the extension portion is further provided with a bending portion protruding toward the outside of the groove.

[0015] Preferably, the protrusions on the two elastic plates are arranged oppositely.

[0016] Preferably, the elastic plate is an elastic aluminum alloy plate.

[0017] A circuit breaker comprises the arc extinguishing cover described in the above solution.

[0018] In the above technical solution, the arc extinguishing hood and circuit breaker provided by the utility model have the following beneficial effects: when the two elastic plates on the arc extinguishing grid are combined with the slots on the isolation plate, as they are inserted, the narrow ends of the two elastic plates are first inserted, and then continue to be inserted until the isolation plate and the arc extinguishing grid are in contact. Because the two elastic plates are arranged obliquely and the distance between the ends is the smallest, as the elastic plates are completely inserted, they will be fixed by tenoning, making the assembly of the arc extinguishing hood more convenient and quick, and the stability after the combination is also greatly guaranteed. . BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0021] Figure 2 A schematic diagram of an explosion structure provided for an embodiment of the utility model;

[0022] Figure 3 This is an enlarged view of point A provided in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1 arc extinguishing grid, 11 notch, 2 isolation plate, 3 tenon, 31 elastic plate, 32 limit block, 4 groove, 41 extension part, 42 protrusion, 43 bending part DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0027] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0028] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0030] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0031] like Figure 1-3 As shown, an arc extinguishing hood and a circuit breaker include a module composed of arc extinguishing grids 1 arranged vertically, and isolation plates 2 mounted on both sides of the module;

[0032] The isolation plate 2 is provided with slots for plugging into the tenons 3 symmetrically arranged on both sides of the arc-extinguishing grid 1;

[0033] The tenon 3 includes elastic plates 31 which are arranged symmetrically in the vertical direction. The elastic plates 31 are arranged obliquely, and the distance between the ends of the elastic plates 31 is the smallest.

[0034] Specifically, because the embodiment specifies that the two elastic plates 31 are arranged obliquely and the distance between the ends of the two elastic plates 31 is the smallest, the distance between the two elastic plates 31 is the largest when the two elastic plates 31 are attached to the side wall of the arc-extinguishing grid 1 .

[0035] Secondly, the elastic plate 31 in the embodiment is an elastic aluminum alloy plate.

[0036] Furthermore, since the arc extinguishing hood is a component of the circuit breaker, its specific installation position is common technical knowledge and will not be described in detail.

[0037] In the above technology, when the two elastic plates 31 on the arc extinguishing grid 1 are combined with the slots on the isolation plate 2, as they are inserted, the narrow ends of the two elastic plates 31 are first inserted, and then continue to be inserted until the isolation plate 2 and the arc extinguishing grid 1 are in contact. Because the two elastic plates 31 are arranged obliquely and the distance between the ends is the smallest, as the elastic plates 31 are completely inserted, they are fixed together, making the assembly of the arc extinguishing cover more convenient and quick, and the stability after the assembly is also greatly guaranteed.

[0038] As an embodiment further provided by the present invention, a side edge of the arc-extinguishing grid 1 is provided with a limiting block 32 extending into the notch 11 opened on one side adjacent to the two elastic plates 31 .

[0039] Specifically, in the above embodiment, the limiting block 32 is located at the position where the distance between the two elastic plates 31 is the largest, so as the elastic plates 31 are completely inserted, the elastic plates 31 are brought together and are limited by the limiting block 32, thereby being firmly fixed.

[0040] As another embodiment further provided by the present invention, the end of the elastic plate 31 is chamfered.

[0041] Specifically, the outer chamfer referred to in this embodiment is actually the end with the smallest distance between the two ends, and arranged on the outer wall on one side, combined with Figure 3 It is knowable.

[0042] As another embodiment further provided by the present invention, a groove 4 is provided on the side of the elastic plate 31 opposite to the limit block 32, and an extension portion 41 is provided on the inner wall of one side of the groove 4, and a protrusion 42 arranged opposite to the groove 4 is provided at the end of the extension portion 41.

[0043] Specifically, because the extension part 41 and the protrusion 42 are a frame structure, when the elastic plate 31 is completely inserted, the elastic plate 31 is moved together and is limited by the limit block 32, so that it is firmly fixed. During the process, the protrusion 42 abuts against the inner wall of the slot, and then deforms after fitting the groove 4, so as to be pinned again.

[0044] It should be noted that the cross section of the extension portion 41 is an isosceles trapezoidal structure.

[0045] As another embodiment further provided by the present invention, a bending portion 43 protruding toward the outside of the groove 4 is further provided on the extension portion 41 .

[0046] Specifically, in the embodiment, when the protrusion 42 contacts the inner wall of the slot, it is deformed after being fitted with the groove 4, and then the pin is fixed again. In the process, the protrusion 42 contacts the inner wall of the slot and is compressed with the bending portion 43 as the contraction point, and then contracts due to the horizontal shear force, thereby generating a pulling force.

[0047] Furthermore, because the protrusions 42 on the two elastic plates 31 in the embodiment are arranged oppositely, the two protrusions 42 in the same slot provide opposite pulling forces.

[0048] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An arc extinguishing hood, characterized in that: It comprises a module composed of arc-extinguishing grids arranged vertically, and isolation plates mounted on both sides of the module; The isolation plate is provided with slots for plugging into tenons symmetrically arranged on both sides of the arc-extinguishing grid; The tenon piece comprises elastic plates which are arranged symmetrically in the vertical direction. The elastic plates are arranged obliquely, and the distance between the ends of the elastic plates is the smallest.

2. The arc extinguishing hood according to claim 1, characterized in that: The side edge of the arc extinguishing grid is provided with a limiting block extending into a notch opened on one side adjacent to the two elastic plates.

3. The arc extinguishing hood according to claim 1, characterized in that: The end of the elastic plate is an outer chamfer.

4. The arc extinguishing hood according to claim 2, characterized in that: The elastic plate is provided with a groove on one side opposite to the limiting block, and an extension portion is provided on the inner wall of one side of the groove, and a protrusion arranged opposite to the groove is provided at the end of the extension portion.

5. The arc extinguishing hood according to claim 4, characterized in that: The extension part and the protrusion part are a frame structure.

6. The arc extinguishing hood according to claim 4, characterized in that: The cross section of the extension portion is an isosceles trapezoidal structure.

7. The arc extinguishing hood according to claim 4, characterized in that: The extension portion is also provided with a bending portion protruding toward the outside of the groove.

8. The arc extinguishing hood according to claim 4, characterized in that: The protrusions on the two elastic plates are arranged oppositely.

9. The arc extinguishing hood according to claim 1, characterized in that: The elastic plate is an elastic aluminum alloy plate.

10. A circuit breaker, characterized in that: It comprises the arc extinguishing hood as described in any one of claims 1 to 9.

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