Arc extinguish chamber of switch

Abstract

An arc extinguish chamber of a switch belongs to the technical field of voltage electric appliances. The switch comprises an arc extinguish chamber, the arc extinguish chamber comprises a pair of side walls and grid pieces arrayed between the pair of side walls, a deionization assembly is arranged on the air outlet side of each grid piece, each deionization assembly comprises an insulating pore plate located on the lower portion and a filtering assembly located above the insulating pore plate, each insulating pore plate comprises a plate body, vent holes are distributed in the plate bodies, and the filter assemblies are arranged in the plate bodies. The insulation pore plate is characterized in that the insulation pore plate further comprises isolation ribs, the isolation ribs are formed by extending upwards from the plate body, and the isolation ribs are arranged in the width direction of the grid pieces. The grid plate has the advantages that the insulating pore plate is arranged on the gas outlet side of the grid plate, and the insulating pore plate is provided with the isolating ribs in the width direction of the grid plate, so that arc gas passing through the vent holes in the insulating pore plate is divided into at least two areas in the array direction of the grid plate, and the upper part of the plate body is divided into at least two isolated areas. The front breakdown is effectively prevented, and the arc extinguishing capability of the arc extinguishing chamber is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of low-voltage electrical apparatus, and particularly relates to an arc-extinguishing chamber of a switch. BACKGROUND

[0002] Switches, especially disconnectors, are important low-voltage electrical apparatuses, which realize the on-off control of the current carrying to meet the management of the on-off of the power supply network.

[0003] With the development of new energy, the voltage level of the switch is higher and higher. For high voltage, the requirement for the insulation of the switch is higher and higher, and how to prevent the breakdown of the arc has become a problem that cannot be ignored. As an arc extinguishing function component of the switch, the arc-extinguishing chamber needs to extinguish the arc as soon as possible, and it is also crucial to prevent the breakdown of the arc in the arc extinguishing process. Usually, after the arc enters the grid sheet of the arc-extinguishing chamber, the arc is prone to breakdown at the gas outlet side of the grid sheet due to factors such as gas blowing, which is called front breakdown. Once the breakdown occurs, it will lead to the failure of the arc-extinguishing chamber to extinguish the arc. Therefore, the ordinary skilled in the art has been concerned about solving this problem to ensure that the arc-extinguishing chamber can reliably extinguish the arc. SUMMARY

[0004] The utility model provides a kind of arc-extinguishing chamber of switch, it is equipped with insulating orifice plate on the gas outlet side of grid sheet, and insulating orifice plate has the isolation rib along the width direction of grid sheet, so that the space above insulating orifice plate is divided into at least two areas in the array direction of grid sheet, effectively prevent front breakdown.

[0005] The utility model accomplishes the task in this way, a kind of arc-extinguishing chamber of switch, switch includes arc-extinguishing chamber, the arc-extinguishing chamber includes a pair of side walls, grid sheet is arrayed between a pair of side walls, there is deionization assembly on the gas outlet side of grid sheet, the deionization assembly includes insulating orifice plate located below and filter assembly located above insulating orifice plate, the insulating orifice plate includes plate body, and the plate body is distributed with air hole, and the insulating orifice plate further includes isolation rib, and the isolation rib is extended from plate body upwards, and the isolation rib is arranged along the width direction of the grid sheet, to divide the plate body into at least two isolated areas.

[0006] In one specific embodiment of the utility model, the isolation rib is located at the gap of the air hole.

[0007] In another specific embodiment of the utility model, the insulating orifice plate further includes a cofferdam, the cofferdam extends upward from the four peripheral edges of the plate body, and the isolation rib extends upward from the upper side of the plate body and penetrates the cofferdam.

[0008] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0009] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0010] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0011] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0012] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0013] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0014] In still another specific embodiment of the utility model, the filter assembly further includes a pressing plate, the pressing plate is used for covering the upper chamber and abutting against the metal mesh plate.

[0015] The utility model has the beneficial effects that: the insulating hole plate is arranged on the gas outlet side of the grid piece, and the insulating hole plate is provided with the isolation rib along the width direction of the grid piece, so that the space above the insulating hole plate is divided into at least two areas in the array direction of the grid piece, the front part breakdown is effectively prevented, and the arc extinguishing ability of the arc extinguishing chamber is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of switch of the utility model.

[0017] Figure 2 The exploded view of the arc extinguishing chamber of the utility model;

[0018] Figure 3 The three-dimensional schematic view of the insulating hole plate of the utility model;

[0019] Figure 4 The side structure schematic view of the insulating hole plate of the utility model;

[0020] Figure 5 The side structure schematic view of the bracket of the utility model;

[0021] Figure 6 The other side structure schematic view of the bracket of the utility model;

[0022] Figure 7 The structure schematic view of the pressing plate of the utility model;

[0023] Figure 8 The partial sectional view of the arc extinguishing chamber of the utility model.

[0024] In the figure: 1. arc extinguishing chamber, 11. side wall, 12. grid piece, 13. ionization elimination assembly, 131. insulating hole plate, 1311. plate body, 13111. air hole, 1312. isolation rib, 1313. cofferdam, 132. filtering assembly, 1321. bracket, 13211. frame body, 13212. supporting plate, 13213. upper partition plate, 13214. lower partition plate, 13215. matching convex edge, 13216. matching concave edge, 1322. metal mesh plate, 1323. pressing plate, 13231. through hole, 13232. annular recess, 14. arc extinguishing chamber cover, 141. air hole, 142. pressing edge, 15. gas generating piece; 2. shell, 21. opening. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are described in detail below in combination with the drawings, but the description of the embodiments is not a limitation on the technical solutions, and any formal but not substantial changes according to the concept of the utility model should be regarded as the protection scope of the utility model.

[0026] In the following description, the directional or positional concepts of up, down, left, right, front and back are all based on the positions shown in the corresponding drawings, which are only provided for the technical solutions of the utility model and simplify the description, and thus cannot be understood as a special limitation on the technical solutions of the utility model.

[0027] For example, Figure 1This is a schematic diagram of a switch. The switch includes a housing 2, and a contact cavity is provided inside the housing 2. The contact cavity is used to accommodate the contact system of the switch. The contact system includes a moving contact and a stationary contact. When carrying current, the moving contact separates from the stationary contact to cut off the current.

[0028] The switch also includes an arc-extinguishing chamber 1, which is inserted through an opening 21 above the contact cavity. After the arc-extinguishing chamber 1 is installed and fixed, it is located above the contact system. When the moving contact separates from the stationary contact and an arc is generated, the arc moves upward and enters the arc-extinguishing chamber 1, where it is extinguished.

[0029] like Figure 2 The arc-extinguishing chamber 1 includes a pair of sidewalls 11 and a grid 12 arrayed between the pair of sidewalls 11. An anti-ionization component 13 is provided on the outlet side of the grid 12, and an arc-extinguishing chamber cover 14 is provided above the anti-ionization component 13. That is, the anti-ionization component 13 is located between the grid 12 and the arc-extinguishing chamber cover 14.

[0030] The arc-extinguishing chamber 1 also includes a pair of gas-generating elements 15, which respectively enclose one of the pair of grid legs of the grid plate 2. An arc channel is formed between the pair of gas-generating elements 15. After passing through the arc channel, the arc enters the cutting area of ​​the grid plate 12.

[0031] The deionization component 13 includes an insulating perforated plate 131 located below and a filter component 132 located above the insulating perforated plate 131. Specifically, the insulating perforated plate 131 is located above the grid plates 12, and the filter component 132 is located above the insulating perforated plate 131. The arc gas between the grid plates 12 first passes through the insulating perforated plate 131, then through the filter component 132, and finally through the arc-extinguishing chamber cover 14 before being discharged outside the arc-extinguishing chamber 1.

[0032] The filter assembly 132 includes a support 1321, a metal mesh plate 1322, and a pressure plate 1323. The support 1321 has a hollow cavity divided into multiple isolated chambers. Multiple sets of the metal mesh plate 1322 are placed within one chamber of the support 1321. The pressure plate 1323 covers the chambers on the support 1321, and when covering the chambers, it also presses down on the metal mesh plate 1322 located inside the chambers.

[0033] like Figure 3This is a schematic diagram of an insulating perforated plate 131. The insulating perforated plate 131 is made of insulating material. The insulating perforated plate 131 includes a plate body 1311, isolation ribs 1312, and a dike 1313. Ventilation holes 13111 are evenly distributed on the plate body 1311. Preferably, the ventilation holes 13111 are circular holes. The isolation ribs 1312 extend upward from the plate body 1311 and are arranged along the width direction of the grid plate 12, dividing the upper part of the plate body 1311 into at least two isolated areas. To accommodate the ventilation holes 13111, preferably, the isolation ribs 1312 are located at the gaps between the ventilation holes 13111. When the holes arranged along the width direction of the grid plate 2 are staggered, the isolation ribs 1312 are wavy, thereby ensuring that the isolation ribs 1312 are located at the gaps between the ventilation holes 13111. This arrangement ensures that the placement of the isolation ribs 1312 does not affect the uniform distribution of the ventilation holes 13111. The cofferdam 1313 is located around the perimeter of the plate 1311. In this embodiment, the cofferdam 1313 is a rectangular frame.

[0034] like Figure 4 The plate 1311 is located below, while the cofferdam 1313 extends upward from the four perimeters of the plate 1311. The isolation rib 1312 extends upward from the upper side of the plate 1311 and passes through the cofferdam 1313.

[0035] like Figure 5 , Figure 6 This is a schematic diagram of the bracket 1321. The bracket 1321 is made of insulating material. Along the height of the arc-extinguishing chamber 1, the top of the bracket 1321 mates with the arc-extinguishing chamber cover 14, and the bottom of the bracket 1321 mates with the insulating perforated plate 131. The bracket 1321 internally houses the metal mesh plate 1322.

[0036] The support 1321 includes a frame 13211, which is enclosed on four sides. A support plate 13212 is provided inside the frame 13211. In the height direction of the arc-extinguishing chamber 1, the upper part of the support plate 13212 is used to accommodate the metal mesh plate 1322, while the lower part of the support plate 13212 is unoccupied. The support plate 13212 has through holes for ventilation.

[0037] In the frame 13211, there are a plurality of partitions along the width direction of the grid 12, including an upper partition 13213 and a lower partition 13214. The upper partition 13213 divides the space above the shelf 13212 into a plurality of upper chambers, and the lower partition 13214 divides the space below the shelf 13212 into a plurality of lower chambers, which are in a one-to-one correspondence in position. The metal mesh plate 1322 is installed in the upper chamber. The pressing plate 1323 is used to cover the upper chamber and abut against the metal mesh plate 1322.

[0038] On the top of the upper chamber, there is a matching convex edge 13215 for tenon-and-mortise cooperation with the pressing plate 1323 to improve air tightness.

[0039] On the lower end of the frame 13211 close to the insulating hole plate 131, there is a matching concave edge 13216 for tenon-and-mortise cooperation with the insulating hole plate 131 to improve air tightness.

[0040] As Figure 7 , a schematic view of the pressing plate 1323. The pressing plate 1323 covers the upper chamber on the bracket 1321, and after the metal mesh plate 1322 is installed in the upper chamber, the pressing plate 1323 covers or presses the metal mesh plate 1322.

[0041] The pressing plate 1323 has a through hole 13231 for the passage of gas. The lower part of the pressing plate 1323 that cooperates with the upper chamber has an annular recess 13232 for tenon-and-mortise cooperation with the matching convex edge 13215 to improve the air tightness of the cooperation between the two.

[0042] As Figure 8 , an installation cooperation view of the insulating hole plate 131, the bracket 1321, the metal mesh plate 1322, the pressing plate 1323, and the arc-extinguishing chamber cover 14.

[0043] The isolation rib 1312 on the insulating hole plate 131 protrudes into the lower chamber of the bracket 1321. Along the array direction of the grid 12, the isolation rib 1312 and the lower partition 13214 divide the shelf 13212 into more spaces. This arrangement is more conducive to preventing the passage of arc gas in the lower chamber and thus preventing the occurrence of front breakdown than the separate arrangement of the isolation rib 1312.

[0044] The metal mesh plate 1322 is arranged in the upper chamber of the support 1321, and due to the arrangement of the lower chamber, the metal mesh plate 1322 has a larger interval with the grid 12, and the plate body 1311 of the insulating hole plate 131 and the supporting plate 13212 of the support 1321 are arranged between the metal mesh plate 1322 and the grid 12, so that the front breakdown can be effectively prevented.

[0045] The arc extinguishing chamber cover 14 is arranged on the upper part of the support 1321, has the air hole 141 for passing the gas, and the lower end surface of the support 1321 is matched with the pressing edge 142, the pressing edge 142 is pressed on the pressing plate 1323, and the pressing plate 1323 is limited.

[0046] In conclusion, the technical scheme of the utility model makes up for the defects in the prior art, successfully completes the invention task, and truly realizes the technical effects described in the technical effect column of the applicant.

Claims

1. A switch's arc-extinguishing chamber, the switch comprising an arc-extinguishing chamber (1), the arc-extinguishing chamber (1) comprising a pair of side walls (11), a plurality of grid fins (12) arranged between the pair of side walls (11), and a deionization assembly (13) on the air outlet side of the grid fins (12), the deionization assembly (13) comprising an insulating perforated plate (131) located below and a filtering assembly (132) located above the insulating perforated plate (131), the insulating perforated plate (131) comprising a plate body (1311) with air holes (13111) distributed thereon, characterized in that: The insulating hole plate (131) further comprises an isolation rib (1312) which extends upward from the plate body (1311) and is arranged along the width direction of the grid sheet (12) to divide the upper part of the plate body (1311) into at least two isolated areas.

2. The switch's arc-extinguishing chamber according to claim 1, characterized in that: The isolation rib (1312) is located at the gap of the ventilation hole (13111).

3. The switch arc chamber of claim 1, wherein: The insulating hole plate (131) further comprises a cofferdam (1313) which extends upward from the four peripheral edges of the plate body (1311), and the isolation rib (1312) extends upward from the upper side of the plate body (1311) and passes through the cofferdam (1313).

4. The switch's arc-extinguishing chamber according to claim 3, characterized in that: The filter assembly (132) comprises a bracket (1321) and a metal mesh plate (1322), the bracket (1321) comprises a frame body (13211) which is in a four-enclosing shape and is provided with a supporting plate (13212) inside, and the upper part of the supporting plate (13212) is used for accommodating the metal mesh plate (1322) in the height direction of the arc extinguishing chamber (1), and the lower part of the supporting plate (13212) is empty, and the supporting plate (13212) is provided with a through hole for ventilation.

5. The switch arc chamber according to claim 4, characterized in that: Inside the frame body (13211), a plurality of partitions are arranged along the width direction of the grid sheet (12), the partitions comprise an upper partition (13213) which divides the upper part of the supporting plate (13212) into a plurality of upper chambers, and the metal mesh plate (1322) is installed in the upper chambers.

6. The switch's arc-extinguishing chamber according to claim 5, characterized in that: The partitions further comprise a lower partition (13214) which divides the lower part of the supporting plate (13212) into a plurality of lower chambers, and the isolation rib (1312) on the insulating hole plate (131) penetrates into the lower chambers of the bracket (1321).

7. The switch's arc-extinguishing chamber according to claim 5, characterized in that: The filter assembly (132) further comprises a pressing plate (1323) which is used for covering the upper chambers and abutting against the metal mesh plate (1322).

8. The switch's arc-extinguishing chamber according to claim 7, characterized in that: The top of the upper chamber is provided with a matching convex edge (13215), and the lower part of the pressing plate (1323) which matches the upper chamber is provided with an annular recess (13232) which is used for the mortise and tenon matching of the matching convex edge (13215).

9. The switch's arc-extinguishing chamber according to claim 7, characterized in that: The arc extinguishing chamber (1) further comprises an arc extinguishing chamber cover (14) which is installed on the upper part of the bracket (1321) and is provided with a gas hole (141) which is used for the passing of gas, and the arc extinguishing chamber cover (14) is provided with an abutting edge (142) on the lower end surface which matches the bracket (1321) and abuts against the pressing plate (1323).

10. The switch arc chamber of claim 4, wherein: The frame (13211) has a matching concave edge (13216) near the lower end of the insulating hole plate (131), which is used to match with the cofferdam (1313) of the insulating hole plate (131) to improve the air tightness.

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