CN204270935U - an interrupter - Google Patents

Abstract

A kind of arc control device, belong to low-voltage circuit breaker technical field.Comprise the arc control device side plate arranged that faces each other for a pair, two insulating trips being disposed on many pieces of arc extinguishing grid pieces between a pair arc control device side plate and being arranged on a pair arc control device side plate, two insulating trips wrap up the bottom of described arc extinguishing grid pieces, be characterized in: insulating trip comprises the base portion of fitting with the medial surface of arc control device side plate, the transition part wrapping up sticking part bottom arc extinguishing grid pieces, be connected base portion and sticking part, transition part is provided with fixing lug boss, fixing lug boss is located in the corresponding perforate of arc control device side plate, and is fixed by welding and arc control device side plate.Advantage: insulating trip not easily at work by bending or pull apart, to guarantee the insulation property of arc control device, increases the service life.

Description

an interrupter

technical field

The utility model belongs to the technical field of low-voltage circuit breakers, in particular to an arc extinguishing chamber.

Background technique

The arc extinguishing chamber structure in the prior art is disclosed by Fig. 3, which includes a pair of arc extinguishing chamber side plates 2 facing each other, and a plurality of arc extinguishing grids are arranged at intervals between the pair of arc extinguishing chamber side plates 2 3. An arc pilot 4 is provided on one side of the arc extinguishing grid 3 , and a cover 1 is fixed on the side plate 2 of the arc extinguishing chamber, and the cover 1 is located above the height of the arc extinguishing grid 3 . Both sides of each arc extinguishing grid 3 are respectively provided with a first raised end 31, a second raised end 32 and a third raised end 33 from top to bottom, and the arc extinguishing grid 3 passes through the first raised end 31, The second protruding end 32 and the third protruding end 33 are installed on corresponding fixing holes on the side plate 2 of the arc extinguishing chamber. Insulating sheets 5 are respectively arranged on both sides of the bottom of the arc extinguishing grid sheet 3 , and the two insulating sheets 5 are correspondingly installed below a pair of side plates 2 of the arc extinguishing chamber in the height direction. Please refer to FIG. 4 , the insulating sheet 5 includes a first mating portion 57 attached to the inner side of the arc extinguishing chamber side plate 2, a second mating portion 58 attached to the bottom surface of the arc extinguishing chamber side plate 2, and The third matching portion 59 that fits the inner surface of the arc extinguishing grid 3, the first matching portion 57 is provided with a plurality of installation protrusions 56 at intervals, and the installation protrusions 56 are cylindrical and used for The preset holes on the side plate 2 of the arc extinguishing chamber cooperate to realize the connection between the insulating sheet 5 and the side plate 2 of the arc extinguishing chamber.

The disadvantages of the above insulating sheet structure in actual use are: the arc will heat the surrounding gas after it is generated in the space of the arc extinguishing chamber, and because the arc is basically located above the insulating sheet 5 during the movement, the air pressure above the insulating sheet 5 is significantly When the air pressure is higher than that below, an airflow is formed, and the airflow hits the third matching portion 59 of the insulating sheet 5, causing the insulating sheet 5 to be cracked or torn off from time to time.

In view of the above prior art, it is necessary to improve the structure of the insulating sheet in the existing arc extinguishing chamber. For this reason, the applicant has made active and effective explorations, and has finally formed the technical scheme to be introduced below.

Contents of the invention

The purpose of the utility model is to provide an arc extinguishing chamber, in which an insulating sheet is arranged, and the insulating sheet is not easy to be bent or torn off during operation.

The purpose of this utility model is achieved in this way. An arc extinguishing chamber includes a pair of arc extinguishing chamber side plates facing each other, a plurality of arc extinguishing grids arranged at intervals between the pair of arc extinguishing chamber side plates and Two insulating sheets installed on a pair of side plates of the arc extinguishing chamber, the two insulating sheets wrap the bottom of the arc extinguishing grid, and the insulating sheets include a base attached to the inner surface of the side plates of the arc extinguishing chamber, wrapped The fitting part at the bottom of the arc extinguishing grid, the transition part connecting the base part and the fitting part, the transition part is provided with a fixed boss, and the fixed boss is pierced in the corresponding opening of the side plate of the arc extinguishing chamber , and fixed to the side plate of the arc extinguishing chamber by welding.

In a specific embodiment of the present utility model, the insulating sheet extends below the base with a fixed edge for adhering to the bottom surface of the side plate of the arc extinguishing chamber.

In another specific embodiment of the present utility model, the bonding portion is provided with an inclined surface matching the curvature of the inner surface of the arc extinguishing grid.

In yet another specific embodiment of the present utility model, the said fixing bosses are rectangular parallelepipeds in an array.

In yet another specific embodiment of the present utility model, the outer surfaces of the base portion, the bonding portion and the transition portion facing the interior of the arc extinguishing chamber are stepped.

In yet another specific embodiment of the present utility model, the arc extinguishing chamber further includes a cover located above the height direction of the arc extinguishing grid and fixed on a pair of side plates of the arc extinguishing chamber.

After the utility model adopts the above structure, it has beneficial effects: the insulating sheet is not easy to be bent or torn during work, so as to ensure the insulation performance of the arc extinguishing chamber and prolong the service life.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of an embodiment of the utility model.

Fig. 2 is a three-dimensional structure diagram of the insulating sheet of the present invention.

Fig. 3 is a three-dimensional structure diagram of an arc extinguishing chamber in the prior art.

Fig. 4 is a three-dimensional structure diagram of an insulating sheet in the prior art.

In the figure: 1. Cover; 2. Side plate of arc extinguishing chamber, 21. First fixing hole, 22. Second fixing hole, 23. Third fixing hole; 3. Arc extinguishing grid, 31. First raised end , 32. The second raised end, 33. The third raised end; 4. The arc starting sheet; 5. The insulating sheet, 51. The base, 52. The transition part, 53. The fitting part, 531. The inclined surface, 54. Fixed side, 55. fixed boss, 56. installation protrusion, 57. first matching part, 58. second matching part, 59. third matching part.

Detailed ways

In order to enable the public to fully understand the technical essence and beneficial effects of the present utility model, the applicant will describe the specific implementation of the present utility model in detail below in conjunction with the accompanying drawings, but the applicant's description of the embodiments is not a limitation to the technical solution, any Changes made in form but not in substance according to the concept of the utility model should be regarded as the protection scope of the utility model.

Please refer to Fig. 1 and Fig. 2, the utility model relates to an arc extinguishing chamber, including a pair of arc extinguishing chamber side plates 2, the arc extinguishing chamber side plates 2 are usually made of insulating materials, and play a role in fixing other arc extinguishing chambers inside the arc extinguishing chamber. The role of parts. A plurality of arc extinguishing grids 3 are arranged at intervals between a pair of arc extinguishing chamber side plates 2, and a plurality of arc extinguishing grids 3 are arrayed between a pair of arc extinguishing chamber side plates 2, in order to lengthen the arc and facilitate the extinguishing of the arc, The arc extinguishing grids 3 are arranged at intervals between the front and the back. Since the shape of the middle part of the arc extinguishing grid sheet 3 is not left-right symmetrical, the positive and negative spaced arrangement makes the arc be pulled into a wave shape, which is beneficial to the extinguishing of the arc. One side of the arc-extinguishing grid 3 is provided with an arc-leading piece 4, which is bent, and has a base parallel to the arc-extinguishing grid 3 and an extension extending toward the cavity of the arc-extinguishing chamber. A cover 1 is fixed on the side plate 2 of the arc extinguishing chamber, and the cover 1 is located above the arc extinguishing grille 3 in the height direction. The cover 1 is provided with a ventilation hole, and an anti-separation structure is provided inside it. Insulating sheets 5 are respectively provided on both sides of the bottom corresponding to the height direction of the arc extinguishing grid sheet 3, and the two insulating sheets 5 are installed below the pair of arc extinguishing chamber side plates 2 in the height direction; The base 51 attached to the inner surface of the arc extinguishing chamber side plate 2, the inner surface of the arc extinguishing chamber side plate 2 is a side of the arc extinguishing chamber side plate 2 facing the interior of the arc extinguishing chamber, for a pair of arc extinguishing chamber side plates 2, The two inner surfaces of the two arc extinguishing chamber side plates 2 are arranged facing each other. "Base" indicates that this component is a component of the insulating sheet 5, without any additional limitation. A transition portion 52 is disposed above the base portion 51 . The transition part 52 is an extension of the base part, and should usually be one piece, that is, produced in one piece. Of course, if the two parts are not produced in one piece, but are fixed through reliable connection, it is also within the solution of the present invention. The insulating sheet 5 has a bonding portion 53 extending above the transition portion 52 for bonding to the inner surface of the arc extinguishing grid 3 . The addition of the bonding portion 53 further increases the exposed area of the insulating sheet 5 inside the arc extinguishing chamber, thereby increasing the gas production. The bonding portion 53 is provided with an inclined surface 531 matching the curvature of the inner surface of the arc extinguishing grid 3 for better bonding with the arc extinguishing grid 3 . "Step shape" includes solutions with sharp corners, squares, polygons, and rounded corners. "Step shape" cannot be equated with the commonly understood square shape, such as square steps. The transition portion 52 is provided with a fixing boss 55 , which is preferably a cuboid, and the insulating sheet 5 is installed on the side plate 2 of the arc extinguishing chamber through the fixing boss 55 . Specifically, the fixed boss 55 should be fixed to the corresponding hole on the side plate 2 of the arc extinguishing chamber. The side plate 2 of the arc extinguishing chamber is fixed, and the welding may be ultrasonic welding. Preferably, since the arc extinguishing grid 3 is provided with a first raised end 31, a second raised end 32 and a third raised end 33 from top to bottom, the first raised end 31, the second raised end 32 and the third protruding end 33 extend into the corresponding first fixing hole 21, the second fixing hole 22 and the third fixing hole 23 on the side plate 2 of the arc extinguishing chamber, and the fixing boss 55 can be borrowed from the third fixing hole The hole 23 , that is, the third fixing hole 23 is properly elongated, the upper part of the hole cooperates with the arc extinguishing grid 3 , and the lower part cooperates with the fixing boss 55 . The base 51 is provided with a cylindrical boss mounting protrusion 56, which is inserted into the corresponding opening of the side plate 2 of the arc extinguishing chamber, and is fixed to the side plate 2 of the arc extinguishing chamber by welding. The protrusion 56 can further strengthen the fixing effect of the insulating sheet 5 .

In the above scheme, since the fixed boss 55 is located on the transition portion 52, when the air flow inside the arc extinguishing chamber impacts the insulating sheet 5 downward, since the position of the fixed boss 55 is close to the upper part of the insulating sheet 5 where the force is concentrated , so the insulating sheet 5 has stronger bending resistance than the prior art, and is not easy to be broken.

For the optimization of the above technical solution, the insulating sheet 5 has a fixed edge 54 extending below the base 51 to be attached to the bottom surface of the side plate 2 of the arc extinguishing chamber. After the fixed edge 54 is adopted, the bottom surface of the side plate 2 of the arc extinguishing chamber can be wrapped. The bending resistance of the insulating sheet 5 is further enhanced.

Claims (6)

1. a kind of arc control device, comprise the arc control device side plate (2) facing each other for a pair and arrange, two insulating trips (5) being disposed on the many pieces of arc extinguishing grid pieces (3) between a pair arc control device side plate (2) and being arranged on a pair arc control device side plate (2), two insulating trips (5) wrap up the bottom of described arc extinguishing grid pieces (3), it is characterized in that: described insulating trip (5) comprises the base portion (51) of fitting with the medial surface of arc control device side plate (2), wrap up the sticking part (53) of described arc extinguishing grid pieces (3) bottom, connect the transition part (52) of described base portion (51) and sticking part (53), transition part (52) is provided with fixing lug boss (55), fixing lug boss (55) is located in the corresponding perforate of arc control device side plate (2), and fixed by welding and arc control device side plate (2).

2. a kind of arc control device according to claim 1, is characterized in that described insulating trip (5) is extended with the fixed edge (54) for fitting with arc control device side plate (2) bottom surface in the below of base portion (51).

3. a kind of arc control device according to claim 1, is characterized in that described sticking part (53) is provided with the inclined plane (531) coordinated with arc extinguishing grid pieces (3) medial surface radian.

4. a kind of arc control device according to claim 1, is characterized in that the cuboid that described fixing lug boss (55) is array.

5. a kind of arc control device according to claim 1, is characterized in that the lateral surface towards arc control device inside of described base portion (51), sticking part (53) and transition part (52) is step-like.

6. a kind of arc control device according to claim 1, is characterized in that described arc control device also comprise one and are positioned at the top of arc extinguishing grid pieces (3) short transverse and the cover (1) be fixed on a pair arc control device side plate (2).