Single-layer direct current arc extinguishing device

Abstract

The utility model relates to the field of arc extinguishing device discloses single layer direct current arc extinguishing device, including shell, two gas production spare, two fixed plate, a plurality of first arc extinguishing lath and lead arc plate, the shell bottom is equipped with the arc inlet, and the arc produced by the division gate enters arc extinguishing device between two gas production spares and carries out arc extinguishing, the foot of a plurality of first arc extinguishing lath is inserted and is installed in the slot of two gas production spares corresponding setting, still including a plurality of second arc extinguishing lath, a plurality of second arc extinguishing lath along the array direction of first arc extinguishing lath, symmetrically set up in the both sides of a plurality of first arc extinguishing lath, and second arc extinguishing lath can further cut the outermost arc, thereby can protect the shell, prevent the arc from causing damage to the shell.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing devices, and in particular to a single-layer DC arc extinguishing device. Background Technology

[0002] Arc-extinguishing devices are critical equipment used in power systems to quickly extinguish electric arcs and ensure the safe operation of circuits. When a switching device interrupts current, a high-temperature arc is generated between the contacts, which may burn out the equipment or even cause a short circuit. Arc-extinguishing devices use physical or chemical means to accelerate arc cooling and inhibit arc reignition, thereby avoiding danger. Common methods include: Lengthening the arc: using mechanical or electromagnetic forces to lengthen the arc and reduce its temperature; Cooling arc extinguishing: using a gaseous or liquid medium to quickly remove the heat from the arc; and Dividing the arc: dividing the arc into multiple short arcs and using the near-cathode effect to extinguish it.

[0003] Publication number CN220829908U discloses a high-performance arc-extinguishing chamber for electrical switches, comprising a housing and an arc-extinguishing chamber assembly, which work together to perform their function. The arc-extinguishing chamber assembly is located inside the housing and consists of arc-extinguishing chambers. The assembly has three layers inside the housing, each layer containing two independently and symmetrically arranged arc-extinguishing chambers. Guide grids are provided between the symmetrical arc-extinguishing chambers. This multi-layered arc-extinguishing chamber design increases the number of arc-extinguishing grids within the original volume, allowing the arc to be cut by more grids and improving the breaking performance of the switch. However, the large number of grids and the multi-layered grid assembly result in a large arc-extinguishing chamber volume, and the outermost arc is prone to damaging the housing. Utility Model Content

[0004] The purpose of this invention is to provide a single-layer DC arc extinguishing device to solve the problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a single-layer DC arc extinguishing device, including a shell, two gas generating components, two fixing plates, a plurality of first arc extinguishing grids and an arc ignition plate; the bottom of the shell is provided with an arc inlet, and the two gas generating components are symmetrically arranged on both sides of the arc inlet. The electric arc generated by the circuit breaker is extinguished by entering the arc extinguishing device between the two gas generating components; the two fixing plates are symmetrically arranged on the outside of the two gas generating components and fixed to the gas generating components; the feet of the plurality of first arc extinguishing grids are inserted into the corresponding slots on the two gas generating components; it also includes a plurality of second arc extinguishing grids; the plurality of second arc extinguishing grids are symmetrically arranged on both sides of the plurality of first arc extinguishing grids along the array direction of the first arc extinguishing grids. The second arc extinguishing grids can further cut the outermost electric arc, thereby protecting the shell and preventing the electric arc from damaging the shell. The upper end of the arc ignition plate extends to the outside of the second arc extinguishing grids and fits against the inner wall of the shell, and is used to guide the electric arc to the area of ​​the first arc extinguishing grids and the second arc extinguishing grids.

[0006] Furthermore, the opposing surfaces of the two gas generating components are provided with snap-fit ​​grooves, and the lower end of the arc-initiating plate is provided with a guide part, which engages in the two snap-fit ​​grooves to make the arc-initiating plate more stable.

[0007] Furthermore, the fixing plate is made of high-temperature resistant melamine material, which can withstand the high-temperature impact generated by the electric arc.

[0008] Furthermore, the number of the first arc-extinguishing grid plates is nineteen. By setting the number of the first arc-extinguishing grid plates to nineteen, the voltage range of the arc-extinguishing device can be perfectly matched, and the arc can be cut into multiple segments. While ensuring the overall arc-extinguishing effect of the arc-extinguishing device, the size of the arc-extinguishing device can be reduced.

[0009] Furthermore, four second arc-extinguishing grids are provided on each side of several first arc-extinguishing grids.

[0010] Furthermore, both the first and second arc-extinguishing grid plates are fixed to the fixing plate by plugging in, making disassembly and assembly easier.

[0011] Furthermore, the top of the outer shell is provided with three exhaust ports, and the arc extinguishing device also includes four deionizing elements and a mounting component. The top surface of the mounting component is provided with four fixing slots. The three exhaust ports are spaced apart along the array direction of the plurality of first arc extinguishing grids, and the four fixing slots communicate downward with the upper parts of the plurality of first arc extinguishing grids and the plurality of second arc extinguishing grids. The insert blocks on both sides of the mounting component are inserted into the corresponding insertion holes on the two fixing plates. The upper ends of the plurality of first arc extinguishing grids and the plurality of second arc extinguishing grids are inserted into the corresponding slots on the bottom surface of the mounting component. The four deionizing elements are respectively installed in the four fixing slots. After the arc is extinguished by the plurality of first arc extinguishing grids and the plurality of second arc extinguishing grids, the gas generated by the arc extinguishing passes through the mounting component and the four deionizing elements and is discharged from the three exhaust ports. The deionizing elements can eliminate the free arc, thereby improving the arc extinguishing effect.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting the number of the first arc-extinguishing grid plates to nineteen, the voltage range of the arc-extinguishing device can be perfectly matched, cutting the arc into multiple segments. This reduces the size of the arc-extinguishing device while ensuring its overall arc-extinguishing effect. The second arc-extinguishing grid plate can further cut the outermost arc, thereby protecting the outer casing and preventing damage from the arc. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded structural diagram of the present invention;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Arc inlet; 12. Exhaust outlet; 2. Gas generating component; 21. Snap-fit ​​groove; 3. Fixing plate; 4. First arc extinguishing grid plate; 5. Second arc extinguishing grid plate; 6. Arc ignition plate; 61. Guide section; 7. Anti-freezing component; 8. Mounting component; 81. Fixing groove. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0020] This invention is applicable to 800V-1100V application scenarios.

[0021] like Figure 1-3As shown, a single-layer DC arc extinguishing device includes a housing 1, two gas generating components 2, two fixing plates 3, several first arc extinguishing grid plates 4, and an arc-initiating plate 6. The bottom of the housing 1 has an arc inlet 11. The two gas generating components 2 are symmetrically arranged on both sides of the arc inlet 11, and each of the two gas generating components 2 has a screw hole on its outer surface. The arc generated by the circuit breaker trips enters the arc extinguishing device between the two gas generating components 2 for arc extinguishing. The two fixing plates 3 are symmetrically arranged on the outer sides of the two gas generating components 2. The edges and outer surfaces of the two fixing plates 3 are in close contact with the inner wall of the housing 1, and the inner surfaces of the two fixing plates 3 are in close contact with the outer surfaces of the two gas generating components 2. The bottom of each of the two fixing plates 3 has a fastening hole corresponding to the screw hole. Screws are threaded through the fastening hole and screwed into the screw hole to fix the fixing plate 3 and the gas generating component 2. Several first arc extinguishing grid plates 4 are arranged in an array above the two gas generating components 2, and their feet are inserted into corresponding slots on the two gas generating components 2. An arc-initiating plate 6 is installed between the fixed plates 3, and its lower end is provided with a guide part 61 for guiding the arc to the area of ​​the first arc-extinguishing grid plate 4 and the second arc-extinguishing grid plate 5. The upper end of the arc-initiating plate 6 extends to the outside of the second arc-extinguishing grid plate 5 and fits against the inner wall of the outer casing 1. It also includes a plurality of second arc-extinguishing grid plates 5; the plurality of second arc-extinguishing grid plates 5 are symmetrically arranged on both sides of the plurality of first arc-extinguishing grid plates 4 along the array direction of the first arc-extinguishing grid plates 4. The second arc-extinguishing grid plates 5 can further cut the outermost arc, thereby protecting the outer casing 1 and preventing the arc from damaging the outer casing 1.

[0022] The two gas generating components 2 have locking grooves 21 on their opposing surfaces; the guide part 61 engages in the two locking grooves 21, making the arc-inducing plate 6 more stable.

[0023] The fixing plate 3 is made of high-temperature resistant melamine material, which can withstand the high-temperature impact generated by the electric arc.

[0024] The number of the first arc-extinguishing grid plates 4 is nineteen. By setting the number of the first arc-extinguishing grid plates 4 to nineteen, the voltage range of the arc-extinguishing device can be perfectly matched, the arc can be cut into multiple segments, and the size of the arc-extinguishing device can be reduced while ensuring the overall arc-extinguishing effect of the arc-extinguishing device.

[0025] Four second arc-extinguishing grids 5 are respectively provided on both sides of several first arc-extinguishing grids 4.

[0026] The first arc-extinguishing grid plate 4 and the second arc-extinguishing grid plate 5 are both fixed to the fixing plate 3 by plugging in, which makes disassembly and assembly easier.

[0027] The top of the outer casing 1 is provided with three exhaust ports 12, which are spaced apart along the array direction of a plurality of the first arc-extinguishing grid plates 4. The arc-extinguishing device also includes four de-freezing elements 7 and mounting elements 8. The top surface of the mounting element 8 is provided with four fixing grooves 81.

[0028] Four fixing slots 81 connect downwards to the upper parts of several first arc-extinguishing grid plates 4 and several second arc-extinguishing grid plates 5. The insert blocks on both sides of the mounting member 8 are inserted into corresponding insertion holes on the two fixing plates 3. The upper ends of several first arc-extinguishing grid plates 4 and several second arc-extinguishing grid plates 5 are inserted into corresponding slots on the bottom surface of the mounting member 8.

[0029] Four de-ionizing elements 7 are respectively installed in four fixed slots 81. After the electric arc is extinguished by several first arc-extinguishing grid plates 4 and several second arc-extinguishing grid plates 5, the gas generated by the arc extinguishing passes through the mounting part 8 and the four de-ionizing elements 7 and is discharged from three exhaust ports 12. The de-ionizing elements 7 can eliminate the free arc, thereby improving the arc extinguishing effect.

[0030] The outer shell 1 adopts a split structure, which is composed of two symmetrical half-shells, making it easy to maintain and assemble.

[0031] The outer casing 1 and mounting component 8 are made of DMC material; the gas generating component 2 is made of gas generating material. The first arc-extinguishing grid 4, the second arc-extinguishing grid 5, and the arc-initiating plate 6 are made of ferromagnetic material. The de-ionizing component 7 is made of stainless steel woven mesh.

[0032] Working process: After the arc generated by the circuit breaker is extinguished by several first arc-extinguishing grid plates 4 and several second arc-extinguishing grid plates 5, the gas generated by the arc extinguishing passes through the mounting part 8 and four deionizing parts 7 and is discharged from three exhaust ports 12. The deionizing parts 7 can eliminate the free arc, thereby improving the arc extinguishing effect.

[0033] The above embodiments are only some embodiments of this utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the protection scope of this utility model.

Claims

1. A single-layer DC arc extinguishing device, comprising a housing (1), two gas generating components (2), two fixing plates (3), a plurality of first arc extinguishing grid plates (4), and an arc-inducing plate (6); the bottom of the housing (1) is provided with an arc inlet (11), and the two gas generating components (2) are symmetrically arranged on both sides of the arc inlet (11); the two fixing plates (3) are symmetrically arranged on the outside of the two gas generating components (2) and fixed to the gas generating components (2), and the feet of the plurality of first arc extinguishing grid plates (4) are inserted into the corresponding slots provided on the two gas generating components (2); Its features are, It also includes several second arc-extinguishing grid plates (5); several second arc-extinguishing grid plates (5) are symmetrically arranged on both sides of several first arc-extinguishing grid plates (4) along the array direction of the first arc-extinguishing grid plates (4). The second arc-extinguishing grid plates (5) can further cut the outermost arc. The upper end of the arc-initiating plate (6) extends to the outside of the second arc-extinguishing grid plates (5) and fits against the inner wall of the outer shell (1) to guide the arc to the area of ​​the first arc-extinguishing grid plates (4) and the second arc-extinguishing grid plates (5).

2. The single-layer DC arc extinguishing device according to claim 1, characterized in that: The two gas generating components (2) have snap-fit ​​grooves (21) on their opposite surfaces. The lower end of the arc-inducing plate (6) has a guide part (61) which engages with the two snap-fit ​​grooves (21).

3. The single-layer DC arc extinguishing device according to claim 1, characterized in that: The fixing plate (3) is made of high-temperature resistant melamine material.

4. The single-layer DC arc extinguishing device according to claim 1, characterized in that: The number of the first arc-extinguishing grid plates (4) is nineteen, which is achieved by setting the number of the first arc-extinguishing grid plates (4) to nineteen.

5. The single-layer DC arc extinguishing device according to claim 1, characterized in that: Four second arc-extinguishing grids (5) are provided on both sides of several first arc-extinguishing grids (4).

6. The single-layer DC arc extinguishing device according to claim 1, characterized in that: The first arc-extinguishing grid plate (4) and the second arc-extinguishing grid plate (5) are both fixed to the fixing plate (3) by plugging.

7. The single-layer DC arc extinguishing device according to claim 1, characterized in that: The outer shell (1) has three exhaust ports (12) on its top. The arc extinguishing device also includes four anti-freezing parts (7) and mounting parts (8). The top surface of the mounting parts (8) has four fixing grooves (81). Three exhaust ports (12) are spaced apart along the array direction of several first arc-extinguishing grid plates (4), and four fixing slots (81) are connected downward to the upper parts of several first arc-extinguishing grid plates (4) and several second arc-extinguishing grid plates (5); the plug parts on both sides of the mounting member (8) are inserted into the corresponding plug holes on the two fixing plates (3); the upper ends of several first arc-extinguishing grid plates (4) and several second arc-extinguishing grid plates (5) are inserted into the corresponding slots on the bottom surface of the mounting member (8); four anti-ionizing elements (7) are respectively installed in the four fixing slots (81). After the arc is extinguished by several first arc-extinguishing grid plates (4) and several second arc-extinguishing grid plates (5), the gas generated by the arc extinguishing passes through the mounting member (8) and the four anti-ionizing elements (7) and is discharged from the three exhaust ports (12). The anti-ionizing elements (7) can eliminate the free arc.

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