CN209543952U

CN209543952U - A kind of magnetic screen line

Info

Publication number: CN209543952U
Application number: CN201822248298.4U
Authority: CN
Inventors: 朱弢; 杨锋; 孙永红
Original assignee: Central Iron and Steel Research Institute
Current assignee: Central Iron and Steel Research Institute
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-10-25
Anticipated expiration: 2028-12-29

Abstract

The utility model belongs to magnetic field shielding field, it is related to a kind of magnetic screen line, for shielding magnetostatic field and low frequency alternating magnetic field, it includes conducting wire (4), insulating layer and at least one layer of high magnetic conduction foil, the high magnetic conduction foil spiral wrap conducting wire (4) outside, screw pitch when winding is 100%-200% of the high magnetic conduction foil along axial width；Insulating layer is two or more layers, and high magnetic conduction foil medial and lateral are provided with insulating layer.The magnetic screen line winds one or more layers high magnetic conduction shielding material outside shielded conducting wire, is isolated between each layer with insulating materials, so that shield effectiveness is multiplied, can greatly improve magnetic shield performance；Spiral wrap is carried out with narrow thin high magnetic conduction chaff, therefore lid magnetic screen line has flexibility；Screw pitch when by changing chaff width and winding, can adjust the flexibility of magnetic screen line.

Description

A kind of magnetic screen line

Technical field

The utility model belongs to magnetic field shielding technical field, in particular to a kind of magnetic screen line.

Background technique

Common shielding line is the conducting wire wrapped up by conductive copper mesh (copper foil), and the electric conductor of package is shielded layer, generally For good conductors such as copper, aluminium.Shielded layer needs to be grounded, and external interference signal can import the earth by shielded layer.It avoids in its entrance Electric signal in layer interference conducting wire.Due to being to make shielding material with electric conductor, this common shielding line can only shield electric field and High-frequency electromagnetic signal, and there is no shield effectiveness to magnetostatic field (including low frequency alternating magnetic field).In the field for needing to prevent magnetic interference It closes, this routine shielding line is with regard to helpless.

Summary of the invention

The purpose of the utility model is to provide the magnetic screen lines that one kind can shield magnetostatic field and low frequency alternating magnetic field.

To achieve the goals above, the utility model provides following technical solution:

A kind of magnetic screen line, for shielding magnetostatic field and low frequency alternating magnetic field, it includes conducting wire 4, insulating layer and at least one The high magnetic conduction foil of layer, for the high magnetic conduction foil spiral wrap outside conducting wire 4, screw pitch when winding is high magnetic conduction foil along axial width 100%-200%, or the winding that partly overlaps；Insulating layer is two or more layers, and high magnetic conduction foil medial and lateral are provided with insulation Layer.

Between conducting wire 4 and high magnetic conduction foil, the outer layer of every layer high magnetic conduction foil be cased with insulating layer.

The screw pitch when width of high magnetic conduction foil and winding is adjustable.

The width of high magnetic conduction foil described in single is the 10%-300%, length 0.2-5m of 4 diameter of conducting wire.

The insulating layer is the insulation tube 5, the insulating layer of coating or the insulating tape of winding of encapsulation.

The conducting wire 4 is single or multicore cable.

The magnetic screen line has flexibility.

Compared with existing shielding line, the utility model has the beneficial effects that:

The magnetic screen line of the utility model, replaces conductive material with permeability magnetic material in its shielding construction, to reach The effect of armoured magnetic field.Meanwhile high permeability material is typically also electric conductor, which also has very well Shield effectiveness.

The magnetic screen line winds one or more layers high magnetic conduction shielding material outside shielded conducting wire and is made；Between each layer It is isolated with insulating materials, so that shield effectiveness is multiplied, magnetic shield performance can be greatlyd improve；With narrow thin high magnetic conduction chaff Spiral wrap is carried out, therefore the magnetic screen line has flexibility；Screw pitch when by changing chaff width and winding, can adjust The flexibility of magnetic screen line.

Detailed description of the invention

The schematic diagram of the magnetic screen line of Fig. 1 the utility model.

Appended drawing reference:

1 first layer chaff, 2 second layer chaff, 3 third layer chaff

4 conducting wire, 5 insulation tube

Specific embodiment

The utility model is further described below with reference to embodiment.

One kind being used to shield the magnetic screen line of magnetostatic field (including low frequency alternating magnetic field), including conducting wire 4, insulating layer and height are led Magnetic foil.

As shown in Figure 1, the present embodiment is by taking three layers of single stranded conductor shielding as an example.

The chaff that high magnetic conduction foil is cut into wide 4mm, is about 1 meter.

According to the flexible requirement of shielding line, chaff can partly overlap winding, can also reserve axial spacing winding. Here first layer chaff 1 is spirally wound on outside conducting wire 4, when winding reserves winding axial spacing.

After having twined first layer chaff 1, it is packaged with insulation tube 5.

Same step carries out 5 insulation-encapsulated of winding and insulation tube of second layer chaff 2, third layer chaff 3.

Winding axial spacing when reducing the width of high magnetic conduction foil or increasing winding, can be improved the flexibility of magnetic screen line.

Claims

1. a kind of magnetic screen line, for shielding magnetostatic field and low frequency alternating magnetic field, it is characterised in that: it includes conducting wire (4), insulation Layer and at least one layer of high magnetic conduction foil, the high magnetic conduction foil spiral wrap conducting wire (4) outside, screw pitch when winding is high magnetic conduction foil Along the 100%-200% of axial width, or the winding that partly overlaps；Insulating layer is two or more layers, and high magnetic conduction foil medial and lateral are equal It is provided with insulating layer.

2. magnetic screen line according to claim 1, it is characterised in that: between conducting wire (4) and high magnetic conduction foil, every layer of height lead The outer layer of magnetic foil is cased with insulating layer.

3. magnetic screen line according to claim 1, it is characterised in that: the screw pitch when width of high magnetic conduction foil and winding is can It adjusts.

4. magnetic screen line according to claim 1, it is characterised in that: the width of high magnetic conduction foil described in single is conducting wire (4) The 10%-300% of diameter, length 0.2-5m.

5. magnetic screen line according to claim 1, it is characterised in that: the insulating layer is the insulation tube (5) of encapsulation, coating Insulating layer or winding insulating tape.

6. magnetic screen line according to claim 1, it is characterised in that: the conducting wire (4) is single or multicore cable.

7. magnetic screen line according to claim 1, it is characterised in that: the magnetic screen line has flexibility.