Arc extinguish chamber

Abstract

The utility model discloses an arc extinguishing chamber, and relates to the technical field of low-voltage electric appliances, and an arc extinguishing mechanism is provided with corresponding side plates, arc extinguishing grid sheets I which are sequentially arranged at intervals along the vertical direction, and arc extinguishing grid sheets II which are positioned on the left and right sides of the arc extinguishing grid sheets I. The top ends of the arc extinguishing grid sheets I are provided with gas generating blocks; the side plate is provided with a gas generating block, the gas generating block forms a slit for a moving contact to pass through, a magnet is assembled in the gas generating block and is used for guiding an electric arc generated by breaking in the slit to move downwards, the side plate is also provided with a mounting frame for placing an arc extinguishing grid plate II, one side of the mounting frame is provided with an insulating plate, and the insulating plate is propped against the gas generating block to isolate the electric arc in the slit on the side; the first arc extinguishing grid piece and the second arc extinguishing grid piece are integrally arranged in a C shape, an arc striking piece is further arranged in the installation frame, the arc striking piece and the insulating plate are located on the same side, the number of the arc extinguishing grid pieces is increased in a limited space, the arc contact area is increased, and therefore heat dissipation is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, concretely is a kind of arc-extinguishing chamber. BACKGROUND

[0002] Due to the arc ablation contact caused by the separation of static contact and moving contact under current-carrying condition, the service life of the contact is reduced, and the overall performance and safety of the electrical appliance are affected. Therefore, the arc-extinguishing chamber is configured to extinguish the arc to ensure the safety of the electrical appliance.

[0003] The arc-extinguishing chamber is placed in front of the static and moving contacts, and the arc generated by the switch is extinguished in the arc-extinguishing chamber after the contact is opened. The extinguishment of the arc is directly related to the arc voltage. When the arc voltage is greater than the power voltage, the arc can be successfully extinguished.

[0004] However, due to the volume problem, the size of the arc-extinguishing chamber and the number of arc-extinguishing grid pieces are basically fixed and difficult to increase, thereby resulting in that the arc-extinguishing performance cannot be greatly improved. TECHNICAL SOLUTION

[0005] The utility model aims at providing an arc-extinguishing chamber to solve the problems in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an arc-extinguishing chamber, an arc-extinguishing mechanism, corresponding side plates, arc-extinguishing grid pieces one arranged in sequence and spaced apart in the up-down direction, and arc-extinguishing grid pieces two located on the left and right sides of the arc-extinguishing grid pieces one, the top end of the arc-extinguishing grid pieces one is provided with a gas generating block, the gas generating block forms a slit for the moving contact to pass through, a magnet is assembled in the gas generating block to guide the arc generated in the slit due to the separation to move downward, the side plate is further provided with a mounting frame for placing the arc-extinguishing grid pieces two, one side of the mounting frame is formed with an insulating plate and abuts against the gas generating block to isolate the arc in the slit on the side, the arc-extinguishing grid pieces one and the arc-extinguishing grid pieces two are placed in the shape of C, and an arc guide piece is further arranged in the mounting frame, the arc guide piece is located on the same side as the insulating plate.

[0007] Preferably, the arc-extinguishing grid pieces two are divided into two groups, and the width of the arc-extinguishing grid pieces two on the side of the insulating plate and the arc guide plate is greater than the width of the arc-extinguishing grid pieces two on the other side.

[0008] Preferably, a mounting column is arranged on one side of the gas generating block, the mounting column is inserted into the side plate to form an assembly structure, and plug blocks with the same function are arranged on the two sides of the arc-extinguishing grid pieces one, the plug blocks are assembled with the side plate.

[0009] Preferably, the arc-extinguishing chamber further comprises an arc-extinguishing chamber cover matched with the arc-extinguishing mechanism, the arc-extinguishing chamber cover is provided with a cavity for placing the arc-extinguishing mechanism, a gas permeation groove for exhausting gas and a mounting hole for mounting and fixing are opened in the bottom of the cavity, and a fixing hole is arranged on the outer wall of the arc-extinguishing chamber cover.

[0010] Preferably, a multi-layer exhaust plate is provided between the arc-extinguishing chamber and the arc-extinguishing mechanism, and a plurality of exhaust holes are distributed on the exhaust port.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up a gas-generating block to form a slit, and cooperating with the magnet in the gas-generating block to magnetically blow the electric arc in the slit, the electric arc moves towards the lower end of the arc-extinguishing grid plate. Insulating plates and arc-inducing plates are set on both sides of the gas-generating block, so that the pulled-down electric arc moves to the arc-inducing plates on both sides according to a predetermined moving path. At the same time, the first arc-extinguishing grid plate and the second arc-extinguishing grid plate are arranged in a C-shape, increasing the number of arc-extinguishing grid plates in a limited space, increasing the contact area of ​​the electric arc, and thus accelerating heat dissipation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the arc-extinguishing chamber cover structure according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the arc-extinguishing mechanism structure according to an embodiment of the present utility model;

[0015] Figure 4 This is a schematic diagram of the internal structure of the arc-extinguishing mechanism according to an embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the arc-extinguishing mechanism structure according to an embodiment of the present utility model (one side plate is not shown);

[0017] Figure 6 This is a side view of the gas-generating block according to an embodiment of the present invention;

[0018] Figure 7 for Figure 6 Sectional view along axis AA;

[0019] Figure 8 This is a schematic diagram of arc movement according to an embodiment of the present invention.

[0020] In the picture:

[0021] 10. Arc-extinguishing chamber cover; 101. Fixing hole; 102. Ventilation groove; 103. Mounting hole;

[0022] 20. Arc extinguishing mechanism; 201. Side plate; 202. Gas generating block; 2021. Mounting column;

[0023] 30. Arc-extinguishing grid plate one; 301. Insert block;

[0024] 40. Mounting frame; 401. Insulation board;

[0025] 50. Magnet;

[0026] 60. Arc-starting plate;

[0027] 70. Arc-extinguishing grid plate two. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-8 An arc-extinguishing chamber includes an arc-extinguishing mechanism 20, a corresponding side plate 201, arc-extinguishing grid plates 30 arranged sequentially in a vertical direction, and arc-extinguishing grid plates 70 located on the left and right sides of the arc-extinguishing grid plates 30. A gas-generating block 202 is provided at the top of the arc-extinguishing grid plate 30, forming a slit through which a moving contact passes. A magnet 50 is installed inside the gas-generating block 202 to guide the arc generated by the breakage within the slit downwards. The side plate 201 is also equipped with a mounting frame 40 for placing the arc-extinguishing grid plates 70. An insulating plate 401 is formed on one side of the mounting frame 40 and abuts against the gas-generating block 202 to isolate the arc within the slit on that side. The arc-extinguishing grid plates 30 and 70 are arranged in a C-shape. An arc-inducing plate 60 is also provided inside the mounting frame 40, located on the same side as the insulating plate 401.

[0030] It should be noted that the moving contact breaks within the slit formed by the gas-generating block 202. At this time, the electric arc is generated within the slit. The magnet 50 generates a magnetic field under the influence of the current, which acts on the electric arc and drives the electric arc to move towards the lower end of the arc-extinguishing grid plate 30. The setting of the insulating plate 401 prevents the downward electric arc from moving directly to the arc-initiating plate on the same side as the insulating plate 401. At this time, the free electric arc moves through the arc-extinguishing grid plate 30 to the arc-extinguishing grid plates 70 on both sides and then back to the arc-initiating plate, thereby increasing the arc's moving distance and increasing the arc contact area, thus accelerating heat dissipation. The arc-extinguishing grid plate 30 and the arc-extinguishing grid plate 70 are arranged in a C-shape, increasing the number of arc-extinguishing grid plates within a limited space.

[0031] Specifically, the second arc-extinguishing grid plate 70 is divided into two groups, wherein the width of the second arc-extinguishing grid plate 70 located on the side of the insulating plate 401 and the arc-inducing plate is greater than the width of the second arc-extinguishing grid plate 70 on the other side.

[0032] It should be noted that the arc-extinguishing grid is divided into two groups, and the width of one group (located on the side of the insulating plate 401 and the arc-starting plate) is specially adjusted. In order to better adapt to the motion characteristics and heat distribution of the electric arc, the wider grid can more effectively capture and disperse the electric arc energy. By increasing the contact area between the electric arc and the grid, the cooling and extinguishing of the electric arc can be accelerated. By adjusting the width of the arc-extinguishing grid, the gas can be guided to flow along a predetermined path, ensuring that heat and harmful gases can be quickly discharged from the equipment, reducing thermal stress and corrosion on the equipment.

[0033] Specifically, a mounting post 2021 is provided on one side of the gas generating block 202. The mounting post 2021 is inserted into the side plate 201 to form an assembly structure. Insert blocks 301 with the same function are provided on both sides of the arc extinguishing grid plate 30. The insert blocks 301 are assembled with the side plate 201.

[0034] It should be noted that the mounting posts 2021 on one side of the gas generating block 202 are designed to ensure that they can be accurately inserted into the pre-set holes of the side plate 201, forming a tight and stable assembly structure, which improves the accuracy and reliability of the assembly. When the insertion block 301 of the arc extinguishing grid plate 30 is inserted into the hole of the side plate 201, a firm assembly connection can be formed, ensuring that the arc extinguishing grid plate 30 can be stably fixed in the arc extinguishing chamber and will not loosen or shift under the impact of the electric arc.

[0035] Specifically, the arc-extinguishing chamber also includes an arc-extinguishing chamber cover 10 that is compatible with the arc-extinguishing mechanism 20. The arc-extinguishing chamber cover 10 is provided with a cavity for placing the arc-extinguishing mechanism 20. The bottom of the cavity has a venting groove 102 for exhausting air and an installation hole 103 for installation and fixing. The outer wall of the arc-extinguishing chamber cover 10 is provided with a fixing hole 101.

[0036] It should be noted that the mounting holes 101 are typically used to install and secure other auxiliary components, such as sensors and terminals. By making reasonable use of these mounting holes 101, the functionality of the arc-extinguishing chamber can be easily expanded to meet different application requirements. At the same time, these mounting holes 101 also increase the flexibility and versatility of the arc-extinguishing chamber cover 10, enabling it to adapt to different models and specifications of switchgear.

[0037] Specifically, a multi-layer exhaust plate is provided between the arc-extinguishing chamber and the arc-extinguishing mechanism 20, and a number of exhaust holes are distributed on the exhaust hole.

[0038] It should be noted that the exhaust holes are evenly distributed on each exhaust plate to ensure that the gas can be discharged evenly from all directions, avoiding local overheating or pressure concentration, optimizing the gas flow path, and allowing the electric arc to come into more full contact with the cooling medium in the arc extinguishing chamber, thereby accelerating the cooling and extinguishing process of the electric arc.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An arc-extinguishing chamber, characterized in that, include: The arc extinguishing mechanism includes corresponding side plates, arc extinguishing grid plates (first type) arranged sequentially at intervals along the vertical direction, and arc extinguishing grid plates (second type) located on the left and right sides of the first type. A gas-generating block is located at the top of the first type, forming a slit through which the moving contact passes. A magnet is installed inside the gas-generating block to guide the arc generated by the breakage within the slit downwards. The side plates are also equipped with a mounting frame for placing the second type of arc extinguishing grid plate. An insulating plate is formed on one side of the mounting frame and abuts against the gas-generating block to isolate the arc within the slit on that side. The first and second types of arc extinguishing grid plates are arranged in a C-shape. An arc-inducing plate is also provided within the mounting frame, located on the same side as the insulating plate.

2. The arc-extinguishing chamber according to claim 1, characterized in that: The arc-extinguishing grid plate is divided into two groups, wherein the width of the arc-extinguishing grid plate on the side of the insulating plate and the arc-inducing plate is greater than the width of the arc-extinguishing grid plate on the other side.

3. The arc-extinguishing chamber according to claim 1, characterized in that: A mounting post is provided on one side of the gas generating block. The mounting post is inserted into the side plate to form an assembly structure. Insert blocks with the same function are provided on both sides of the arc extinguishing grid plate. The insert blocks are assembled with the side plate.

4. The arc-extinguishing chamber according to claim 1, characterized in that: The arc-extinguishing chamber also includes an arc-extinguishing chamber cover that is compatible with the arc-extinguishing mechanism. The arc-extinguishing chamber cover is provided with a cavity for placing the arc-extinguishing mechanism. The bottom of the cavity has a venting groove for exhaust and a mounting hole for installation and fixing. The outer wall of the arc-extinguishing chamber cover is provided with a fixing hole.

5. The arc-extinguishing chamber according to claim 4, characterized in that: A multi-layer exhaust plate is provided between the arc-extinguishing chamber and the arc-extinguishing mechanism, and a number of exhaust holes are distributed on the exhaust plate.

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