CN201066598Y

CN201066598Y - A power cable for detecting leakage current based on metal foil

Info

Publication number: CN201066598Y
Application number: CNU2007201492615U
Authority: CN
Inventors: 章龙
Original assignee: Shanghai ELE Manufacturing Corp
Current assignee: Shanghai ELE Manufacturing Corp
Priority date: 2007-05-22
Filing date: 2007-05-22
Publication date: 2008-05-28
Anticipated expiration: 2017-05-22

Abstract

The utility model discloses a power cord for detecting leakage current by taking advantage of metal foils. The device is composed of three current-carrying copper core wires, insulating layers wrapping the three current-carrying copper core wires respectively and the outermost insulating layers wrapping the outermost layers of the three current-carrying copper core wires. The device is characterized in that the outside of each insulating layer of two of the three current-carrying copper core wires is wrapped by a metal foil layer for detecting leakage current respectively; the outside of each metal foil layer is wrapped by a sparse metal braid layer respectively. The copper-entwined leakage current detecting layer with the coverage rate of 85 percent in the prior power cord is divided into two parts by the utility model. The power cord has the function of leakage current detection. The outside of the insulating layer of two copper core wires is wrapped by a thin and conductive metal foil layer and then the conductive metal foil layer is wrapped by a sparse metal braid layer; therefore the cost of the power wire is reduced greatly.

Description

A kind of power line that utilizes metal forming to survey leakage current

Technical field

The utility model relates to a kind of power line that is widely used on the household electrical appliance such as refrigerator, air-conditioning, washing machine, refers to that especially a kind of its metal forming fast detecting that carries of utilizing goes out the power line that whether has leaky in the power line.

Background technology

Universal day by day along with household electrical appliance, as the appearance of air-conditioning, washing machine, refrigerator etc., people more and more pay attention to the safety in utilization of household electrical appliance.At present, various electrical equipment are in order operate as normal all to carry long or longer power line about one 1 meter.As shown in Figure 1, this power line normally is made of three current-carrying

copper cores

2,3,4, is enclosed with a layer insulating 5 (as rubber or plastics) respectively in the outside of every copper core; At last, the outermost at three copper cores wraps up a layer insulating 1 (as rubber or plastics) again.As shown in Figure 2, for the power line of circle, also between three current-carrying

copper core

2,3,4 line insulating layers 5 and outermost insulating barrier 1, add some fillers 6 (as cotton thread) usually, to increase the pliability of power line.

In long-term use, this power line is usually because aging, or its insulating barrier wearing and tearing in the electrical equipment moving process, causes between the live wire, the neutral line, ground wire in the power line leaky taking place, and produce spark and cause fire, cause the user to be subjected to personal property loss.For the fire incident of preventing to cause owing to power line electric leakage, as shown in Figure 3, Figure 4, people have invented and a kind ofly can survey the power line that whether has leakage current in the power line.This power line has also been set up the leakage current detecting layer 7 that one deck is formed by the fine copper wire braiding in the outside of the insulating barrier 5 of the live wire 2 and the neutral line 3 except that having Fig. 1, structure shown in Figure 2.For safety, to require coverage rate usually be 85% to this leakage current detecting layer.So just can detect leakage current between live wire, the neutral line and the ground wire by this leakage current detecting layer; and (as has the attaching plug of creepage protection function by earth leakage protective device; be called for short LCDI) cut off the electricity supply timely, reach the purpose of protection personal safety, security appliance and fire preventing.

Though the above-mentioned power line that has the leakage current detecting layer can be protected the generation of user's personal safety and fire preventing effectively,, along with the price of raw material copper is constantly soaring, the manufacturing cost of this power line improves constantly.

Summary of the invention

In view of the foregoing, the purpose of this utility model provide a kind of low cost of manufacture, can be widely used on the household electrical appliance such as refrigerator, air-conditioning, washing machine, can fast detecting go out the power line that whether has leaky in the power line.

For achieving the above object, the utility model is taked following design: a kind of power line that utilizes metal forming to survey leakage current, it is characterized in that by three current-carrying copper cores, be wrapped in the insulating barrier of three current-carrying copper cores outside and be wrapped in three outmost outermost layer insulating barriers of current-carrying copper core and constitute respectively:

The outside of two current-carrying copper core insulating barriers is enclosed with the metal forming that one deck is used to detect leakage current respectively therein;

Also be enclosed with the sparse metal organization level of one deck in the outside of metal forming.

The described metal forming that is wrapped in respectively on the copper core external insulation layer is knitted the volume layer with metal separately respectively and is contacted.

Described wire sheathing is made with metallic conductors such as copper or aluminium.

Described metal forming can be one deck Copper Foil or one deck tinfoil paper or one deck aluminium foil.

At described outermost layer insulating barrier and be enclosed with two copper cores of metal organization level and be enclosed with between another root copper core of insulating barrier and be added with filler.

Since the utility model will be existing have in the power line of leakage current measuring ability, the complete coverage rate that is woven into by copper cash is that 85% leakage current detecting layer is divided into two parts, be wrapped in the wherein outside of two copper core insulating barriers with thin metal forming earlier, and then knit the volume layer with sparse metal and wrap up a conductive metal foil, thereby reduce the cost of power line greatly.

The utility model has the advantages that: cost is lower, and dependable performance can detect whether there is leaky in the power line quickly and accurately.

Description of drawings

Fig. 1 is common power line structure schematic diagram;

Fig. 2 is another kind of common power line structure schematic diagram;

Fig. 3 is the existing power line structure schematic diagram that increases the leakage current detecting layer;

Fig. 4 is the another kind of existing power line structure schematic diagram that increases the leakage current detecting layer;

Fig. 5 surveys the power line structure schematic diagram of leakage current for the utility model utilizes metal forming;

Fig. 6 surveys the power line structure schematic diagram of leakage current for the utility model another kind utilizes metal forming.

Embodiment

As shown in Figure 5, the disclosed power line of the utility model by three current-carrying

copper cores

4,5,6 and the conductive metal foil 3 and the wire sheathing 2 that are used to detect leakage current constitute.The outside of three

copper cores

4,5,6 is enclosed with a layer insulating (as plastics) 7,8,9 respectively; The outside of two

copper core

4,5

insulating barriers

7,8 also is enclosed with the conductive metal foil 3 that one deck is used to detect leakage current respectively therein; Also be enclosed with the sparse metal of one deck in the outside of metal forming 3 and knit volume layer 2 (its minimum coverage rate can be 2%); Metal forming 3 is arranged on the

outer insulating barrier

7,8 of

copper core

4,5 and knits with sparse metals separately and compile between the layer 2, and knits with metal separately respectively and compile layers 2 and contact.The metal of two

copper cores

4,5 is knitted the outermost of compiling layer 2 and the insulating barrier 9 of another root copper core 6 and also is enclosed with a layer insulating (as plastics) 1 therein.

Metallic conductors such as above-mentioned wire sheathing 2 available copper, aluminium are made.This wire sheathing 2 is mainly used in the circuit board that leakage current is detected on metal forming 3 and the earth leakage protective device (as have the attaching plug of creepage protection function, be called for short LCDI) and links to each other.

Fig. 6 is the another kind of power line structure schematic diagram of the utility model.As shown in the figure, this power line is circular power line, it outermost layer insulating barrier 1 and be enclosed with metal organization level 2 two

copper cores

4,5, be enclosed with between the copper core 6 of insulating barrier 9 and be added with some fillers (as cotton thread) 10, enriching the space between outermost layer insulating barrier 1 and the

copper core

4,5,6, and can strengthen the toughness of power line.

In order to reduce manufacturing cost of the present utility model, being wrapped in wherein, the metal forming 3 of two

copper core

4,5

insulating barriers

7,8 outsides can be one deck Copper Foil or one deck tinfoil paper or one deck aluminium foil or one deck conductive rubber.

When leaky occurring between the copper core in the

power line

4 and 5 or between

copper core

4 and 6 or between

copper core

5 and 6, conductive metal foil 3 all can detect this leaky and pass to metallic conductor quickly and accurately knits volume layer 2.

Because it is that 85% leakage current detecting layer is divided into two parts that the utility model will be existing has the complete coverage rate that is woven into by copper cash in the power line of leakage current measuring ability, use the wherein outside of two

copper core

4,5

insulating barriers

7,8 of the thin metal forming parcel that conducts electricity earlier, and then knit volume layer 2 with sparse metal and wrap up the metal forming 3 of conduction, thereby reduce the cost of power line greatly.

The above is structure design principle of the present utility model and specific embodiment schematic diagram, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the protection range of the present utility model.

Claims

1. power line that utilizes metal forming to survey leakage current, it is characterized in that by three current-carrying copper cores (4,5,6), be wrapped in the insulating barrier (7,8,9) of three current-carrying copper cores (4,5,6) outsides and be wrapped in three current-carrying copper cores (4,5,6) outmost outermost layer insulating barriers (1) formation respectively:

The outside of two current-carrying copper cores (4,5) insulating barriers (7,8) is enclosed with the metal forming (3) that one deck is used to detect leakage current respectively therein;

Also be enclosed with the sparse metal organization level (2) of one deck in the outside of metal forming (3).

2. a kind of power line that utilizes metal forming to survey leakage current according to claim 1 is characterized in that: the described metal forming (3) that is wrapped in respectively on copper core (4, the 5) external insulation layer (7,8) is knitted volume layer (2) with metal separately respectively and is contacted.

3. a kind of power line that utilizes metal forming to survey leakage current according to claim 2, it is characterized in that: described wire sheathing (2) is made with metallic conductors such as copper or aluminium.

4. a kind of power line that utilizes metal forming to survey leakage current according to claim 3, it is characterized in that: described metal forming (3) can be one deck Copper Foil or one deck tinfoil paper or one deck aluminium foil.

5. a kind of power line that utilizes metal forming to survey leakage current according to claim 4 is characterized in that: at described outermost layer insulating barrier (1) and be enclosed with two copper cores (4,5) of metal organization level (2) and be enclosed with between another root copper core (6) of insulating barrier (9) and be added with filler.

6. a kind of power line that utilizes metal forming to survey leakage current according to claim 5, it is characterized in that: described filler is a cotton thread.