Composite aluminum capacitor impregnation screen

Abstract

The utility model discloses a composite type aluminum capacitor impregnation screen which comprises a punching screen mesh, a mesh side, a gasket, an inner support column, an outer support column, a baffle ring, a hanging ring and an interlayer, an interlayer made of steel wires is arranged on the punching screen, and the capacitor is placed on the interlayer, so that the end face of the capacitor is in line contact with the punching screen; an inner supporting column is fixedly installed on the punching screen, and an outer supporting column is connected to the upper end of the inner supporting column in an inserted mode. A gasket is arranged between the punching screen and the inner supporting column. Three hanging rings are uniformly distributed and welded on the inner side of the net side; and baffle rings are welded around the hanging rings. According to the utility model, the original contact between the bottom of the core cladding and the sieve bottom plane with holes is changed into linear contact between the bottom of the core cladding and the stainless steel wires on the grids, so that electrolyte flows out along the steel wires. According to the utility model, redundant electrolyte on the capacitor core cladding can be fully drained, the hidden danger of liquid leakage of the capacitor is eliminated, the drained electrolyte can be utilized, the cost is reduced, and the grid is used as a tool, is invested once and can be used for a long time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of impregnation of aluminum electrolytic capacitor core package, and particularly relates to a composite aluminum capacitor impregnation screen, which is suitable for manufacturing of aluminum electrolytic capacitors in the capacitor industry. BACKGROUND

[0002] With the development of science and technology, the improvement of social demand and the birth of new machines, the application of medium and high voltage large-capacity industrial aluminum electrolytic capacitors is continuously expanding in offshore power generation, remote wind power generation and photovoltaic inversion, and the demand is increasing. Due to maintenance problems, the stability and durability of aluminum electrolytic capacitors in these places are extremely high. Aluminum electrolytic capacitors generate gas during operation, most of which is used to repair the anodic oxide film, and a small part is stored in the capacitor shell. The longer the working time, the more gas in the shell, and the pressure difference between the inside and outside of the capacitor metal shell will increase with the increase of working voltage and working time. If the gas pressure increases to a certain extent, the safety valve will open, causing the capacitor to fail prematurely.

[0003] In the production process of aluminum electrolytic capacitors, electrolyte needs to be impregnated, therefore, it is very important to control the electrolyte content of the core package during the automatic impregnation process. After impregnation, small aluminum electrolytic capacitors are placed in a centrifuge to shake off excess electrolyte. However, when producing large aluminum electrolytic capacitors, due to the large size of the core package and the equipment, the centrifuge cannot be used to dry it, and only self-drying is allowed. The traditional method is to vertically place the core package in a perforated screen at the bottom, allowing excess electrolyte to leak out of the screen holes. Since the bottom of the screen is a flat surface, although there are holes, there is still a considerable contact area between the screen and the core package. The electrolyte itself also has considerable viscosity. Under the action of the surface tension of the electrolyte, after standing and draining, there will still be a lot of electrolyte remaining at the bottom of the core package, which will cause production difficulties and potential leakage.

[0004] The utility model provides a kind of composite aluminum capacitor impregnation screen, which can further improve the stability and durability of capacitor, and promote the technical improvement of industrial aluminum electrolytic capacitor industry. Utility model content

[0005] The utility model aims at overcoming the surface tension of electrolyte, fully draining the electrolyte at the bottom of the core package, and solving the technical problem that part of high-voltage capacitor cannot pass the durability test.

[0006] Technical scheme: a composite aluminum capacitor impregnation screen, comprising a punched screen, a net support, a gasket, an inner support column, an outer support column, a ring, a lifting ring and a spacer.

[0007] The punching screen is provided with a layer of partition layer made of steel wire, and the capacitor is placed on the partition layer so that the end face of the capacitor is in linear contact with the punching screen.

[0008] The inner support column is fixedly installed on the punching screen, the outer support column is inserted at the upper end of the inner support column, the outer support column can be replaced according to the height of the capacitor core package, the gasket is arranged between the punching screen and the inner support column, and the inner support column, the outer support column and the gasket are used for adjusting the height between the screens to adapt to the capacitor immersion of different heights.

[0009] The inner side of the net support is uniformly welded with three lifting rings, and the periphery of the lifting ring is welded with a check ring.

[0010] As optimization: the inner support column is close to the inner side of the net support.

[0011] The original contact between the bottom of the core package and the screen bottom with holes is changed into linear contact with the stainless steel wire on the grid, and the electrolyte flows along the steel wire. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a top view structure schematic diagram of the utility model;

[0013] Fig. 2 It is a side view structure schematic diagram of the utility model;

[0014] Fig. 3 It is an overall structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] EMBODIMENT

[0016] The existing immersion screen adopts a single-layer thin plate punching structure, in order to ensure the mechanical strength of the screen, a certain spacing is left between the holes, so that the core package is in surface contact with the screen. This design affects the discharge of excess electrolyte. If these excess electrolytes cannot be effectively discharged, excessive pressure will be generated in the capacitor due to gasification, which will cause the pressure relief device to start early, thereby shortening the service life of the capacitor. In order to solve the above problems, the utility model adopts a composite immersion screen structure to realize linear contact between the core package and the screen.

[0017] As shown in Figs. 1-3 A composite aluminum capacitor immersion screen, comprising a punching screen 1, a net support 2, a gasket 3, an inner support column 4, an outer support column 5, a check ring 6, a lifting ring 7 and a partition layer 8.

[0018] The punching screen 1 is provided with a layer of partition 8 made of steel wire, and the capacitor is placed on the partition 8, so that the end surface of the capacitor is in linear contact with the punching screen 1, and the punching screen 1 has certain mechanical strength and can significantly improve the impregnation effect.

[0019] The inner support column 4 is fixedly installed on the punching screen 1, the inner side of the inner support column 4 is close to the inner side of the net help 2, the outer support column 5 is inserted at the upper end of the inner support column 4, and the length of the outer support column 5 can be replaced according to the height of the capacitor core package. The gasket 3 is arranged between the punching screen 1 and the inner support column 4. The inner support column 4, the outer support column 5 and the gasket 3 are used for adjusting the height of the screen and the screen, so as to adapt to the impregnation of capacitors of different heights.

[0020] The inner side of the net help 2 is uniformly welded with three lifting rings 7, and the periphery of the lifting ring 7 is welded with a stop ring 6.

[0021] The utility model discloses a capacitor core package impregnation device, which comprises a net help 2, a punching screen 1 and a gasket 3, wherein the net help 2 is fixedly installed on the punching screen 1, and the gasket 3 is arranged between the net help 2 and the punching screen 1.

[0022] The above description clearly and completely describes the technical scheme in the embodiments of the utility model, so that those skilled in the art can better understand the advantages and features of the utility model, and the protection scope of the utility model is more clearly defined. The embodiments described in the utility model are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A composite aluminum capacitor impregnation sieve, characterized in that: Includes perforated screen (1), mesh side (2), washer (3), inner support column (4), outer support column (5), retaining ring (6), lifting ring (7), and partition (8); The perforated screen (1) is provided with a layer of steel wire partition (8). The capacitor is placed on the partition (8) so that the end face of the capacitor and the perforated screen (1) are in line contact. An inner support column (4) is fixedly installed on the perforated screen (1), and an outer support column (5) is inserted into the upper end of the inner support column (4). The length of the outer support column (5) can be changed according to the height of the capacitor core. A washer (3) is provided between the perforated screen (1) and the inner support column (4). The inner support column (4), the outer support column (5), and the washer (3) are used to adjust the height between the screens to accommodate capacitors of different heights. Three lifting rings (7) are evenly distributed and welded on the inner side of the mesh (2), and retaining rings (6) are welded around the lifting rings (7).

2. The composite aluminum capacitor impregnation sieve according to claim 1, characterized in that: The inner support column (4) is closely attached to the inner side of the mesh side (2).

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