CN217485325U

CN217485325U - Grid arc extinguish chamber

Info

Publication number: CN217485325U
Application number: CN202221532882.2U
Authority: CN
Inventors: 刘艳辉; 边玉兴; 赵智勇; 赵坤
Original assignee: Chusul Electric Co ltd
Current assignee: Chusul Electric Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-09-23
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a grid arc extinguish chamber, which comprises a first chamber wall, a second chamber wall and an arc extinguish grid group, wherein the arc extinguish grid group is fixed between the first chamber wall and the second chamber wall in an inserting way, a first insulating plate is arranged on the first chamber wall, a second insulating plate is arranged on the second chamber wall, a magnetic blow strengthening element is fixedly connected between the first insulating plate and the second insulating plate respectively, so that electric arcs can enter the arc extinguish chamber more quickly, the arc extinguish speed is improved, the arc extinguish grid group also comprises a section of second grid group which is arranged in an arc shape, the arrangement of the grid plates in the arc extinguish chamber is more compact, more arc extinguish grid plates can be arranged in the arc extinguish chamber, the upper limit of the voltage for arc extinguish is improved, the arc structure of the second grid group can elongate the electric arcs, the long arcs enter the arc extinguish grid group and are divided into short arcs, and the short arcs are further lengthened by the arc structure of the second grid group, the electric arc is extinguished rapidly, and a plurality of arc extinguishing modes are used in a combined mode, so that the arc extinguishing effect and speed of the arc extinguishing chamber are improved.

Description

Grid arc extinguish chamber

Technical Field

The utility model belongs to the technical field of the arc extinguishing, specifically speaking relates to a grid piece explosion chamber.

Background

Arcing is a gas discharge phenomenon, and the presence of arcing prolongs the circuit path time and exacerbates the hazards of power system faults. Arcing sparks can also cause breakdown damage to some electronic products along with the circuit. The main current methods for arc extinction are to elongate or divide the arc into small arcs.

The grid arc-extinguishing chamber is a device for arc-extinguishing by adopting a split arc mode, and is widely applied to various switching appliances at present. When the movable contact and the fixed contact are separated to generate electric arcs, the electric arcs generate magnetic fields by themselves. The arc is subjected to a magnetic field and blown towards the grid set. After the electric arc enters the grid group, the electric arc is divided into a plurality of short arcs, and after the cold state grid sheet is attached to the short arcs, the electric arc resistance is increased, and the electric arc voltage is increased. When the arc voltage is greater than the power frequency recovery voltage at the two ends of the contact, the arc is extinguished.

The prior grid-plate arc-extinguishing chamber has the following problems that the arc is pushed to move towards the arc-extinguishing chamber only by the magnetic field generated by the arc, and the arc-extinguishing speed needs to be improved. The arc extinguishing bars piece of current arc extinguisher is straight shape or little slope arrangement mostly, under the prerequisite of certain explosion chamber high volume, bars piece quantity sets up limitedly, and bars piece quantity influences the biggest arc extinguishing voltage of explosion chamber, and then has just restricted the application range of explosion chamber, and in addition, present bars piece explosion chamber has only utilized single and has cut apart the arc extinguishing principle with long electric arc basically, and the arc extinguishing means is single, and the effect of arc extinguishing exists and improves the space.

Disclosure of Invention

Aiming at the condition that the arc extinguishing speed, the arc extinguishing effect and the arc extinguishing upper limit voltage of the existing grid-plate arc extinguishing chamber are all required to be improved, the invention provides the following utility model.

The utility model provides a grid piece explosion chamber, includes first locular wall, second locular wall, arc extinguishing grid piece group is pegged graft and is fixed between first locular wall and second locular wall, first locular wall inboard is provided with first insulating plate, second locular wall inboard is provided with the second insulation board, and the reinforcing element is blown to fixedly connected with magnetism respectively between first insulating plate and first locular wall and second insulation board and the second locular wall.

Preferably, the arc-extinguishing grid set comprises a first grid set and a second grid set, the grids of the first grid set are arranged horizontally, the first grid set is arranged below the second grid set, and the grids of the second grid set are arranged in an arc shape around the magnetic blow-out reinforcing element.

Preferably, the top of the second grid sheet group is provided with an iron grid, the iron grid is provided with a convex arc striking angle, and the grid sheet at the bottommost part of the first grid sheet group is provided with a convex contact.

Preferably, all be equipped with insulating chamber on first insulation board and the second insulation board, can form the enclosure space between insulating chamber and the locular wall, insulating intracavity portion is provided with the recess, and magnetism blows the reinforcing element card and goes into fixed connection in the recess, ensures that magnetism blows the reinforcing element and can not fall out.

Preferably, when the arc-extinguishing chamber is applied to a direct-current electrical appliance switch, the arc-extinguishing strengthening element is a permanent magnet.

Preferably, when the arc extinguishing chamber is applied to an alternating current electrical appliance switch, the arc striking reinforcing element is cast iron.

Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that: be provided with magnetic blow reinforcing element in the explosion chamber, improved the speed of arc extinguishing, set up second grid slice group to the arc range, can set up more arc extinguishing pieces promptly under the unchangeable prerequisite of volume, let arc extinguishing upper limit voltage obtain improving, setting up of curved arc extinguishing grid slice group lets electric arc elongated earlier when getting into the explosion chamber, later long electric arc is cut apart into short electric arc, and last partial short electric arc is further elongated again, improves the arc extinguishing effect.

Drawings

FIG. 1 is a schematic diagram of an explosion structure of an arc extinguish chamber in the present invention;

fig. 2 is a schematic view of a three-dimensional structure of the arc extinguish chamber of the utility model;

fig. 3 is a left section schematic diagram of the arc extinguish chamber of the utility model.

The corresponding relationship between the reference numbers of the figures and the names of the components in the figures is as follows:

1. a first chamber wall; 2. a second chamber wall; 3. arc extinguishing grid group; 4. a first insulating plate; 5. a second insulating plate; 6. a magnetic blow reinforcement element; 7. an iron gate.

31. A first group of grids; 32. a second group of grid plates; 311. a contact; 41. an insulating cavity; 411. a groove; 71. and (4) an arc striking angle.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, which are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-3, it is the utility model discloses preferred application in grid piece explosion chamber in direct current electrical apparatus field, including first locular wall 1, second locular wall 2, arc extinguishing grid group 3, there are a plurality of grid holes on first locular wall 1 and the second locular wall 2, arc extinguishing grid group 3 inserts grid hole in order to fix between first locular wall 1 and the second locular wall 2, first locular wall 1 inboard is connected with first insulating plate 4 through the buckle, be fixed with magnetism on the first insulating plate 4 and blow reinforcing element 6, just magnetism blows reinforcing element 6 and is located between first locular wall 1 and the first insulating plate 4.

Specifically, the present embodiment employs a permanent magnet as the magnetic blow reinforcing member 6, the permanent magnet being in a circular sheet shape. A second insulating plate 5 connected through a buckle is arranged on the second chamber wall 2, and another permanent magnet is fixed on the second insulating plate 5 and is also positioned between the second chamber wall 2 and the second insulating plate 5. The permanent magnet creates an additional strong magnetic field in the arc extinguish chamber, the strong magnetic field blows the electric arc to the arc extinguish grating group 3, the long electric arc on the arc extinguish grating group 3 is divided into short electric arcs, the short electric arcs are difficult to keep self stability, and finally extinguish, the process of moving the electric arc to the arc extinguish grating group 3 is quicker due to the addition of the permanent magnet, and the arc extinguishing time is shortened.

Further, the arc extinguishing grid group 3 includes a first grid group 31 and a second grid group 32, the first grid group 31 is arranged below the second grid group 32, and the grids inside the first grid group 31 are arranged horizontally; the grid sheet arrangement mode inside the second grid sheet group 32 is arc-shaped, starting from the grid sheet adjacent to the top of the first grid sheet group 31, surrounding the permanent magnet to gradually tilt upwards to form fine angle arrangement, and finally the arc-extinguishing grid sheet at the top and the arc-extinguishing grid sheet at the bottom are in a nearly 90-degree state, the arc-shaped arrangement of the second grid sheet group 32 can be realized by arranging more arc-extinguishing grid sheets on the premise of unchanging the volume of the arc-extinguishing chamber, so that the arc-extinguishing voltage upper limit of the arc-extinguishing chamber is improved, electric arc is elongated by the arc-shaped second grid sheet group 32 in the process of entering the arc-extinguishing chamber and then enters the arc-extinguishing grid sheet group 3 to be divided, the fine angle design between the adjacent grid sheets of the second arc-extinguishing grid sheet group 3 is realized, short arc entering the second grid sheet group 32 is elongated again, the two arc-extinguishing modes are combined in a staggered mode, and the arc-extinguishing effect and the speed are improved.

Further, an iron grid 7 is arranged at the top of the second grid group 32, an arc striking angle 71 is arranged on the iron grid 7, and the arc striking angle 71 is in contact with a moving contact 311 of an electrical switch in an off state; the bottom grid of the first grid group 31 is provided with a convex contact 311, the contact 311 is in contact with a fixed contact 311 inside an electrical switch, after the switch is disconnected, an electric arc is generated between the movable contact 311 and the fixed contact 311, and under the action of magnetic blow of an arc extinguishing chamber, the electric arc is rapidly transferred between the arc striking angle 71 and the movable contact 311, so that the arc extinguishing speed is further increased.

Further, the first insulating plate 4 and the second insulating plate 5 are both provided with an insulating cavity 41, a closed cavity can be formed between the insulating cavity 41 and the chamber wall, a circular groove 411 is formed inside the insulating cavity 41, the permanent magnet is clamped and fixed in the groove 411, and a closed space is formed between the insulating cavity 41 and the chamber wall to ensure that the permanent magnet cannot fall out of the arc extinguish chamber.

Example 2

When a permanent magnet is used as the magnetic blow-out reinforcement element 6 in the ac circuit, the direction of the magnetic field applied to the arc is not changed, and the arc force is changed along with the direction of the arc current, which affects the movement of the ac arc to the arc extinguishing chamber, so that the permanent magnet cannot be used as the magnetic blow-out reinforcement element 6 for the ac arc.

Still referring to fig. 1-3, cast iron is used as the blow-enhancing element 6, provided that the other structure of the arc chute of embodiment 1 remains unchanged. When the direction of the electric arc is changed, the direction of the magnetic field is changed along with the direction of the electric arc at the same time, so that the direction of the magnetic field applied to the electric arc is unchanged and the electric arc still moves towards the arc extinguish chamber. Finally, the arc is elongated and then divided into a plurality of short arcs in the arc extinguish chamber, and then the short arcs are further elongated, and finally the arc is extinguished.

Claims

1. The utility model provides a grid piece explosion chamber, includes first chamber wall (1), second chamber wall (2), arc extinguishing grid group (3) are pegged graft and are fixed between first chamber wall (1) and second chamber wall (2), its characterized in that: the magnetic blow-out type air purifier is characterized in that a first insulating plate (4) is arranged on the inner side of the first chamber wall (1), a second insulating plate (5) is arranged on the inner side of the second chamber wall (2), and magnetic blow-out reinforcing elements (6) are fixedly connected between the first insulating plate (4) and the first chamber wall (1) and between the second insulating plate (5) and the second chamber wall (2) respectively.

2. Arc chute according to claim 1, characterized in that: the arc extinguishing grid group (3) comprises a first grid group (31) and a second grid group (32), the first grid group (31) is arranged below the second grid group (32), grid pieces of the first grid group (31) are horizontally arranged, and grid pieces of the second grid group (32) are arranged in an arc shape around the magnetic blow reinforcing element (6).

3. Arc chute according to claim 2, characterized in that: an iron grid (7) is arranged at the top of the second grid set (32), an arc striking angle (71) is connected to the iron grid (7), and a convex contact (311) is arranged on the grid at the bottommost part of the first grid set (31).

4. Arc chute according to claim 1, characterized in that: be equipped with insulating chamber (41) on first insulation board (4) and second insulation board (5), insulating chamber (41) are connected at the locular wall inboard, and insulating chamber (41) inside is provided with recess (411), and magnetic blow reinforcing element (6) fixed connection is in recess (411).

5. Arc chute according to claim 1, characterized in that: the magnetic blow-out reinforcing element (6) is a permanent magnet.

6. Arc chute according to claim 1, characterized in that: the magnetic blow-out reinforcing element (6) is cast iron.