CN210349576U

CN210349576U - Electromagnetic interference resistance casing of electric power system component

Info

Publication number: CN210349576U
Application number: CN201921325195.1U
Authority: CN
Inventors: 桑紫熙
Original assignee: Nanjing Ruitang Technology Development Co Ltd
Current assignee: Nanjing Ruitang Technology Development Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-04-17
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses an electromagnetic interference resistance casing of electric power system component, including the body, the body includes the interior casing of making by the plastics material and the shell body of making by the aluminium material, and the shell body is located the interior casing outside, and clearance fit is formed with between interior casing and the shell body and separates the chamber, separates the intracavity and is equipped with the shielding layer, and the body lower extreme still welds the heat dissipation arch. The utility model discloses be equipped with bilayer structure's shell, and be equipped with multiple structure's electromagnetic shield structure between bilayer shell, it is effectual to shield, can restrain the condenser and receive the interference of outside electromagnetic wave, has also restrained condenser itself to the external radiation electromagnetic wave, reduces the influence to external environment.

Description

Electromagnetic interference resistance casing of electric power system component

Technical Field

The utility model particularly relates to an electromagnetic interference resistance casing of electric power system component.

Background

The parallel capacitor is originally called a phase-shifting capacitor. The reactive power compensation circuit is mainly used for compensating reactive power of inductive loads of a power system so as to improve power factors, improve voltage quality and reduce line loss. The single-phase parallel capacitor mainly comprises a core, a shell, a wire outlet structure and the like. Because the capacitor and the power system connected with the capacitor are usually arranged outdoors, the capacitor is easily interfered by electromagnetic signals of the external environment during the working time of the capacitor, and the working time of the capacitor can also radiate electromagnetic disturbance signals to the outside through the connected electronic circuit to influence the external environment. Therefore, to solve the problems that the conventional capacitor case usually adopts an aluminum case, the structure is simple, and the electromagnetic interference prevention effect needs to be improved, an electromagnetic interference prevention case for an electrical system component is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetic interference resistance casing of electric power system component to the weak point to prior art to solve current capacitor case simple structure, electromagnetic interference resistance effect and remain the problem of improvement.

In order to achieve the above object, the utility model provides a following technical scheme:

an electromagnetic interference preventing shell of an electric power system element comprises a body, and is characterized in that: the top surface of the body is symmetrically provided with two wiring grooves, wiring terminals are fixedly arranged in the wiring grooves, two connecting fasteners are symmetrically welded on the left side and the right side of the body, and a heat dissipation bulge is welded at the lower end of the body;

the body includes the interior casing of making by the plastic material and the shell body of making by the aluminium material, the shell body is located the interior casing outside, clearance fit is formed with the separate chamber between interior casing and the shell body, be equipped with the shielding layer in the separate chamber, the shielding layer includes the fire-retardant layer of asbestos fibre and polyurethane foaming layer, the fire-retardant layer of asbestos fibre and the bonding cooperation of interior casing outer wall, polyurethane foaming layer and shell body inner wall bonding cooperation, still be equipped with electrically conductive plastic layer and flexible wave-absorbing layer between the fire-retardant layer of asbestos fibre and the polyurethane foaming layer, the fire-retardant layer of asbestos fibre, electrically conductive plastic layer, flexible wave-absorbing layer and polyurethane foaming layer bond in proper order fixedly and constitute the shielding layer.

Preferably, the heat dissipation bulge is hollow rectangular frame structure, both ends all are linear equidistant and have seted up a plurality of radiating grooves around the heat dissipation bulge, and the inside rectangle square matrix that is of heat dissipation bulge is arranged and is equipped with a plurality of copper posts, copper post lower extreme and radiating groove are located same horizontal plane, the body bottom surface is passed to copper post upper end and extends to inside.

Preferably, a plurality of grooves are formed in the front vertical surface and the rear vertical surface of the outer shell at equal intervals in a linear mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses be equipped with bilayer structure's shell, and be equipped with multiple structure's electromagnetic shield structure between bilayer shell, it is effectual to shield, can restrain the condenser and receive the interference of outside electromagnetic wave, has also restrained condenser itself to the external radiation electromagnetic wave, reduces the influence to external environment.

2. The utility model discloses it is protruding to still weld the heat dissipation at the shell lower extreme to at the protruding inside a plurality of heat dissipation copper posts that are equipped with of heat dissipation, utilize the copper post to conduct the inside heat of condenser out, the heat is taken away to the circulation air in the rethread radiating groove. The utility model discloses the radiating efficiency is good, avoids the tradition to set up the louvre on capacitor case and causes its electromagnetic wave interference's problem.

Drawings

Fig. 1 is a schematic top view of the structure of the present invention;

FIG. 2 is a schematic bottom view of the structure of the present invention;

fig. 3 is a schematic structural section view of the present invention.

In the figure: 1. an inner housing; 2. an outer housing; 201. a groove; 3. a shielding layer; 301. an asbestos fiber flame retardant layer; 302. a conductive plastic layer; 303. a flexible wave-absorbing layer; 304. a polyurethane foam layer; 4. a body; 401. a wiring slot; 402. a wiring terminal; 403. connecting fasteners; 404. a heat dissipation protrusion; 405. a heat sink; 406. and a copper pillar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

an electromagnetic interference preventing shell of an electric power system element comprises a body 4, and is characterized in that: two wiring grooves 401 are symmetrically formed in the top surface of the body 4, wiring terminals 402 are fixedly arranged in the wiring grooves 401, two connecting fasteners 403 are symmetrically welded on the left side and the right side of the body 4, and heat dissipation bulges 404 are welded at the lower end of the body 4;

the body 4 comprises an inner shell 1 made of plastic materials and an outer shell 2 made of aluminum materials, the outer shell 2 is arranged outside the inner shell 1, a separation cavity is formed between the inner shell 1 and the outer shell 2 in a clearance fit mode, a shielding layer 3 is arranged in the separation cavity, the shielding layer 3 comprises an asbestos fiber flame-retardant layer 301 and a polyurethane foaming layer 304, the asbestos fiber flame-retardant layer 301 is in bonding fit with the outer wall of the inner shell 1, asbestos fibers have high fire resistance, electric insulation, electromagnetic wave absorption and heat insulation, and are important fireproof, insulating and heat-preservation materials capable of effectively playing a flame-retardant role, the polyurethane foaming layer 304 is in bonding fit with the inner wall of the outer shell 2, the polyurethane PU foaming material is a multifunctional material and has a series of functions of heat preservation, heat insulation, water resistance, moisture resistance, sound insulation, anti-shedding, anti-shock resistance, electromagnetic wave absorption and the like, a conductive plastic layer 302 and a flexible, the conductive plastic is prepared by mixing resin serving as a base material and a conductive additive, has an excellent electromagnetic shielding effect, the flexible wave-absorbing layer 303 adopts high-performance electromagnetic absorbers such as nano materials, planar hexagonal ferrite, amorphous magnetic fibers, particle films and the like as an absorbing medium, and the asbestos fiber flame-retardant layer 301, the conductive plastic layer 302, the flexible wave-absorbing layer 303 and the polyurethane foaming layer 304 are sequentially bonded and fixed to form the shielding layer 3.

The heat dissipation protrusion 404 is of a hollow rectangular frame structure, a plurality of heat dissipation grooves 405 are formed in the front end and the rear end of the heat dissipation protrusion 404 at equal intervals, a plurality of copper columns 406 are arranged in the heat dissipation protrusion 404 in a rectangular matrix, the lower ends of the copper columns 406 and the heat dissipation grooves 405 are located on the same horizontal plane, and the upper ends of the copper columns 406 penetrate through the bottom surface of the body 4 and extend to the inside. The utility model discloses utilize the copper post to conduct out the inside heat of condenser, the heat is taken away to the circulation air in the rethread radiating groove, avoids directly offering the louvre on capacitor case and causes its electromagnetic wave to reveal or disturb internal component.

The front and rear vertical surfaces of the outer shell 2 are provided with a plurality of grooves 201 at equal intervals. The utility model discloses a plurality of recesses 201 have all been seted up on the facade around housing 2 for the anti-interference panel of increase.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electromagnetic interference preventing shell of an electric power system element comprises a body (4), and is characterized in that: the top surface of the body (4) is symmetrically provided with two wiring grooves (401), wiring terminals (402) are fixedly arranged in the wiring grooves (401), two connecting fasteners (403) are symmetrically welded on the left side and the right side of the body (4), and heat dissipation protrusions (404) are welded at the lower end of the body (4);

the body (4) comprises an inner shell (1) made of plastic material and an outer shell (2) made of aluminum material, the outer shell (2) is arranged outside the inner shell (1), a separate cavity is formed between the inner shell (1) and the outer shell (2) in clearance fit, a shielding layer (3) is arranged in the separate cavity, the shielding layer (3) comprises an asbestos fiber flame-retardant layer (301) and a polyurethane foaming layer (304), the asbestos fiber flame-retardant layer (301) is in bonding fit with the outer wall of the inner shell (1), the polyurethane foaming layer (304) is in bonding fit with the inner wall of the outer shell (2), a conductive plastic layer (302) and a flexible wave-absorbing layer (303) are also arranged between the asbestos fiber flame-retardant layer (301) and the polyurethane foaming layer (304), the asbestos fiber flame-retardant layer (301), the conductive plastic layer (302), the flexible wave-absorbing layer (303) and the polyurethane foaming layer (304) are sequentially bonded and fixed to form the shielding layer (3).

2. An EMI shield housing for an electrical system component as claimed in claim 1, wherein: radiating protrusion (404) are hollow rectangular frame structure, both ends all are linear equidistant around radiating protrusion (404) and have seted up a plurality of radiating grooves (405), and radiating protrusion (404) inside is rectangle square matrix and arranges and be equipped with a plurality of copper posts (406), copper post (406) lower extreme and radiating groove (405) are located same horizontal plane, body (4) bottom surface extension to inside is passed to copper post (406) upper end.

3. An EMI shield housing for an electrical system component as claimed in claim 1, wherein: a plurality of grooves (201) are formed in the front vertical surface and the rear vertical surface of the outer shell (2) at equal intervals in a linear mode.