Arc extinguishing device of switch

Abstract

An arc extinguishing device of a switch belongs to the technical field of low-voltage apparatuses. The arc extinguishing device comprises a pair of side plates and a plurality of grid sheets arranged between the pair of side plates in an array mode, the grid sheets are arranged in parallel at intervals, and the arc extinguishing device is characterized in that the arc extinguishing device is provided with a separator made of insulating materials, the separator comprises a chimney part extending out of the top of the arc extinguishing device, and the chimney part is enclosed in a surrounding mode. Gas exhausted by the arc extinguishing device enters the chimney part and then is exhausted from the top of the chimney part, and the chimney part forms an isolated space within the height range. The arc extinguishing device has the advantages that the isolation piece is arranged on the arc extinguishing device, and the chimney part of the isolation piece forms an isolation space within the upward extension height range of the isolation piece, so that breakdown between adjacent arc extinguishing devices is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage electrical technology, specifically relating to an arc-extinguishing device for a switch. Background Technology

[0002] Switches, as important power distribution equipment, are connected to the power grid to protect downstream loads from fault current damage. However, with the development of new energy sources, the application of switches is increasing, and users' voltage requirements for switches are also constantly rising. This has placed new demands on existing switches.

[0003] The switch includes a contact system that can close or open to achieve the switching on or off. The contact system is located inside the switch housing, and an arc-extinguishing device is located above it. The electric arc generated on the contact system enters the arc-extinguishing device and is extinguished within it. Normally, the gas inside the arc-extinguishing device is discharged to the outside. However, since switches typically contain two or more arc-extinguishing devices, the gases discharged from different devices often cause breakdown when they come into contact outside the exhaust port of the arc-extinguishing device. Similarly, the gases discharged from the arc-extinguishing device can also cause breakdown between the arc-extinguishing device and other metal parts of the switch. To solve this technical problem, the applicant has made an advantageous design, and the technical solution described below arose in this context. Utility Model Content

[0004] The purpose of this invention is to provide an arc-extinguishing device for a switch, which can prevent breakdown at the exhaust port of the arc-extinguishing device, thereby improving the reliability of the switch.

[0005] The purpose of this utility model is achieved as follows: an arc-extinguishing device for a switch, the arc-extinguishing device comprising a pair of side plates and a plurality of grid plates arrayed between the pair of side plates, the grid plates being arranged parallel to each other at intervals, an isolation member made of insulating material being installed on the arc-extinguishing device, the isolation member including a chimney portion extending from the top of the arc-extinguishing device, the chimney portion being enclosed on all four sides, the gas discharged from the arc-extinguishing device entering the chimney portion and then being discharged from the top of the chimney portion, the chimney portion forming an isolated space within a height range.

[0006] In a specific embodiment of this utility model, an anti-free radical component is provided above the grid plate, the isolation member is located above the anti-free radical component, the anti-free radical component includes a bracket and an anti-free radical module, and the anti-free radical module is placed inside the bracket.

[0007] In another specific embodiment of this utility model, the isolation member is mounted on the bracket.

[0008] In another specific embodiment of this utility model, the isolation member and the bracket are integrally formed.

[0009] In another specific embodiment of this utility model, the chimney section is square-shaped.

[0010] In another specific embodiment of this utility model, a cover plate is also included. The cover plate is placed inside the isolation member. The isolation member also includes a mounting part. The mounting part is located at the lower edge of the chimney part in the height direction of the arc extinguishing device. After the cover plate and the arc extinguishing component are installed and fixed, the mounting part is clamped between the cover plate and the bracket.

[0011] In a further specific embodiment of this utility model, the mounting part is located inside the chimney part.

[0012] In a further specific embodiment of this utility model, the de-freezing component further includes a gasket, which is located between the mounting part and the bracket and has multiple air vents.

[0013] In yet another specific embodiment of this utility model, the interior of the chimney section has a vent hole, which corresponds to a plurality of air outlet holes on the gasket, allowing the gas inside the arc extinguishing device to be discharged upward.

[0014] In yet another specific embodiment of this utility model, the switch further includes a top cover that covers the arc-extinguishing device. A gap is left between the chimney and the top cover. The gas in the arc-extinguishing device enters the interior of the top cover after passing through the chimney and is then discharged outward from the exhaust port of the top cover.

[0015] This invention prevents breakdown at the exhaust port of the arc-extinguishing device by setting an isolation component on the arc-extinguishing device, with the chimney portion of the isolation component forming an isolation space within its upward extension height. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the switch described in this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the arc-extinguishing chamber described in the first embodiment of this utility model;

[0018] Figure 3 This is an exploded view of the arc-extinguishing chamber described in the first embodiment of this utility model;

[0019] Figure 4This is a schematic diagram of the structure of the isolation component described in the first embodiment of this utility model;

[0020] Figure 5 This is a perspective view of the bracket described in the first embodiment of the present invention;

[0021] Figure 6 This is another perspective view of the bracket described in the first embodiment of this utility model;

[0022] Figure 7 This is an exploded view of the arc-extinguishing chamber described in the second embodiment of this utility model;

[0023] Figure 8 This is a schematic diagram of the assembly of the isolation component and the bracket described in the second embodiment of the present utility model;

[0024] Figure 9 This is an exploded view of the switch described in the third embodiment of this utility model;

[0025] Figure 10 This is a perspective view of the cover bracket described in the third embodiment of this utility model.

[0026] In the diagram: 1. Arc extinguishing device; 11. Side plate; 12. Grid plate; 13. Anti-freezing component; 131. Bracket; 1311. Inner cavity; 1312. Frame; 1313. Protruding edge; 13131. Embedded boss; 132. Anti-freezing module; 133. Gasket; 1331. Vent hole; 134. Washer; 2. Housing; 3. Top cover; 31. Outer cover; 32. Internal bracket; 321. Partition plate; 322. Screw hole; 100. Isolator; 101. Chimney section; 102. Mounting section; 103. Vent hole; 104. Screw through hole; 200. Cover plate; 300. Sealing plate. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0028] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model. Example 1

[0029] like Figure 1As shown, this utility model relates to a switch, which includes an isolating switch and a circuit breaker. The switch includes an arc-extinguishing device 1, a housing 2, and a top cover 3. A contact system is installed inside the housing 2. The arc-extinguishing device 1 is located at the opening of the housing 2 and above the contact system. The top cover 3 covers the arc-extinguishing device 1. When the contact system separates, an electric arc is generated. The arc enters the arc-extinguishing device 1 and is extinguished. After extinguishing, gas is discharged from the top of the arc-extinguishing device 1 and then enters the interior of the top cover 3, and finally exits to the outside of the switch.

[0030] like Figure 2 and Figure 3 As shown, the arc extinguishing device 1 includes a pair of side plates 11 and a grid 12 arrayed between the pair of side plates 11. There are multiple grids 12, which are arranged in parallel and spaced apart from each other.

[0031] Furthermore, an anti-ionization component 13 is provided at the outlet end of the grid plate 12, that is, above the grid plate 12. The anti-ionization component 13 includes a bracket 131, an anti-ionization module 132, a gasket 133, and a washer 134. The bracket 131 is configured as a square frame for mounting the anti-ionization module 132. Typically, the bracket 131 is a hollow frame structure, and the anti-ionization module 132 is placed inside the bracket 131. The anti-ionization module 132 is used to deionize the arc gas, that is, to eliminate charged particles in the arc gas. The anti-ionization module 132 usually contains a metal filter. In this embodiment, the metal filter is composed of stacked metal mesh plates, and there are multiple sets of metal mesh plates placed at intervals within the anti-ionization module 132. The gasket 133 is located above the bracket 131, and its surface is provided with vertically penetrating air outlet holes 1331 spaced apart. The gasket 133 is made of rubber and serves to seal the gap. The washer 134 is located at the bottom of the bracket 131 and between the bracket 131 and the side plate 11, and also serves to seal.

[0032] An isolation member 100 is provided above the deionization component 13, and a cover plate 200 is provided inside the isolation member 100. Preferably, the cover plate 200 is made of a metal plate. More preferably, when the cover plate 200 is made of a metal plate, an insulating layer or insulating plate can be added above the cover plate 200, and the insulating layer or insulating plate should not affect the air outlet of the cover plate 200.

[0033] like Figure 4The isolating element 100, made of insulating material, is installed on the arc-extinguishing device 1 and includes a chimney portion 101 extending from the top of the arc-extinguishing device 1. The chimney portion 101 is enclosed on all four sides, forming an isolating space within its upward extension height to prevent the arc-extinguishing device 1 from puncturing at the outlet of other arc-extinguishing devices 1 or surrounding metal components. Since the isolating element 100 with the chimney portion 101 already provides protection against puncture, the top cover 3 is not necessary in this embodiment. The chimney portion 101 can be rectangular, circular, or other annular shapes; here, a rectangular shape is preferred. The gas discharged from the arc-extinguishing device 1 enters the interior of the chimney portion 101 and exits from the top of the chimney portion 101.

[0034] Furthermore, the isolation member 100 also includes a mounting portion 102 for mounting the isolation member 100 to the bracket 131. After the cover plate 200 and the anti-freezing component 13 are installed and fixed, the mounting portion 102 is clamped between the cover plate 200 and the bracket 131. Of course, the mounting portion 102 is not essential; the isolation member 100 can also be installed using other fixing methods such as snap-fit ​​or screws. However, using the aforementioned mounting portion 102 obviously simplifies the installation method of the isolation member 100. Preferably, the mounting portion 102 is located inside the chimney portion 101. More preferably, the mounting portion 102 is provided around the chimney portion 101 on the inner side of the lower edge in the height direction of the arc extinguishing device 1. The mounting portion 102 is also provided with a plurality of screw through holes 104. The gasket 133 is provided between the mounting part 102 and the bracket 131. That is, in the upward extension direction of the arc extinguishing device 1, the bracket 131, the gasket 133, the mounting part 102 and the cover plate 200 are stacked.

[0035] In this embodiment, the isolation member 100 is installed by placing the cover plate 200 inside the isolation member 100, and then fixing the cover plate 200, the isolation member 100, and the bracket 131 with screws. The screws pass through the screw through hole 104 on the mounting part 102.

[0036] The chimney section 101 has an internal vent 103 extending along its height for upward discharge of gas from the arc-extinguishing device 1. Preferably, there is one vent 103, which corresponds to the vent 1331 on the gasket 133, meaning that the arc gas inside the arc-extinguishing device 1 can enter the vent 103 after passing through the vent 1331 on the gasket 133.

[0037] like Figure 5 and Figure 6 As shown, the bracket 131 is made of insulating material, typically a thermosetting material. The bracket 131 includes a frame 1312 and an inner cavity 1311 formed by the frame 1312, the inner cavity 1311 extending vertically along the height of the arc-extinguishing device 1. A protruding edge 1313 extends downward from the bottom of the frame 1312, the protruding edge 1313 being square-shaped. The protruding edge 1313 also has an embedded boss 13131 on its outer side wall, the embedded boss 13131 being used to mate with the side plate 11 for installation. Example 2

[0038] like Figure 7 and Figure 8 Another embodiment of the present invention is illustrated. The difference between this embodiment and the first embodiment is that the bracket 131 and the isolation member 100 are integrally formed; that is, the chimney portion 101 of the isolation member 100 is integrally formed on the bracket 131. In this case, the mounting portion 102 and its screw through holes 104 can be omitted, thereby effectively reducing the number of components in the arc-extinguishing device 1, simplifying the installation steps of the isolation member 100, and improving reliability. The gasket 133 and the cover plate 200 are both located inside the isolation member 100, specifically inside the chimney portion 101.

[0039] In the first and second embodiments described above, a gap is left between the chimney section 101 and the top cover 3. The gas in the arc extinguishing device 1 enters the interior of the top cover 3 after passing through the chimney section 101, and is then discharged outward from the exhaust port of the top cover 3. Example 3

[0040] like Figure 9 As shown, the top cover 3 is formed by combining an outer cover 31 and an inner support 32. The inner support 32 is fixed to the arc-extinguishing device 1 with screws, and the outer cover 31, after fitting over the inner support 32, is also fixed to the arc-extinguishing device 1 with screws. The inner support 32 is also provided with screw holes 322 for fixing to the arc-extinguishing device 1. Specifically, the inner support 32 is fixed to the cover plate 200 of the arc-extinguishing device 1 through the screw holes 322. Preferably, each arc-extinguishing device 1 has 6 screw holes 322 to achieve a better fastening effect. A sealing plate 300 is also provided between the inner support 32 and the arc-extinguishing device 1 to fill the gap between them.

[0041] The isolation element 100 is not included in this embodiment.

[0042] like Figure 10 As shown, the internal support 32 has a partition 321 formed at its bottom. The partition 321 is located outside the arc-extinguishing device 1 and separates the external space of adjacent arc-extinguishing chamber devices 1 at the extension height of the partition 321.

Claims

1. An arc-extinguishing device for a switch, the arc-extinguishing device (1) comprising a pair of side plates (11) and a plurality of grid plates (12) arrayed between the pair of side plates (11), the grid plates (12) being arranged parallel to each other at intervals, characterized in that: The arc extinguishing device (1) is equipped with an isolation member (100) made of insulating material. The isolation member (100) includes a chimney section (101) extending from the top of the arc extinguishing device (1). The chimney section (101) is enclosed on all four sides. The gas discharged from the arc extinguishing device (1) enters the chimney section (101) and is discharged from the top of the chimney section (101). The chimney section (101) forms an isolated space within its height range.

2. The arc-extinguishing device for a switch according to claim 1, characterized in that: An anti-free component (13) is provided above the grid plate (12), and the isolation member (100) is located above the anti-free component (13). The anti-free component (13) includes a bracket (131) and an anti-free module (132), and the anti-free module (132) is placed inside the bracket (131).

3. The arc-extinguishing device for a switch according to claim 2, characterized in that: The isolation element (100) is mounted on the bracket (131).

4. The arc-extinguishing device for a switch according to claim 2, characterized in that: The isolation element (100) and the bracket (131) are integrally formed.

5. The arc-extinguishing device for a switch according to claim 1, characterized in that: The chimney section (101) is square-shaped.

6. The arc-extinguishing device for a switch according to claim 2, characterized in that: It also includes a cover plate (200) placed inside the isolation member (100). The isolation member (100) also includes a mounting part (102) located at the lower edge of the chimney part (101) in the height direction of the arc extinguishing device (1). After the cover plate (200) is installed and fixed with the anti-freezing component (13), the mounting part (102) is clamped between the cover plate (200) and the bracket (131).

7. The arc-extinguishing device for a switch according to claim 6, characterized in that: The mounting part (102) is located inside the chimney part (101).

8. The arc-extinguishing device for a switch according to claim 6, characterized in that: The de-free component (13) further includes a gasket (133), which is located between the mounting part (102) and the bracket (131) and has multiple air vents (1331).

9. The arc-extinguishing device for a switch according to claim 8, characterized in that: The interior of the chimney section (101) has a vent (103), which corresponds to a plurality of air outlets (1331) on the gasket (133) for the gas inside the arc extinguishing device (1) to be discharged upward.

10. The arc-extinguishing device for a switch according to claim 1, characterized in that: The switch also includes a top cover (3), which covers the arc extinguishing device (1). There is a gap between the chimney section (101) and the top cover (3). The gas in the arc extinguishing device (1) enters the interior of the top cover (3) after passing through the chimney section (101), and then is discharged outward from the exhaust port of the top cover (3).

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