CN201489886U - Electric cable with electric leakage detection function - Google Patents
Electric cable with electric leakage detection function Download PDFInfo
- Publication number
- CN201489886U CN201489886U CN2009202160809U CN200920216080U CN201489886U CN 201489886 U CN201489886 U CN 201489886U CN 2009202160809 U CN2009202160809 U CN 2009202160809U CN 200920216080 U CN200920216080 U CN 200920216080U CN 201489886 U CN201489886 U CN 201489886U
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- detection
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- cable
- electrical leakage
- current
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Abstract
The utility model relates to an electric cable with an electric leakage detection function, comprising three current carrying core wires. An insulating layer is respectively coated outside each current carrying core wire, and an insulating sheath is coated at the outermost layer of the electric cable. The electric cable is characterized in that an electric leakage detection layer is also coated outside the insulating layer of at least one current carrying core wire and comprises a metal silk screen and a single-surface conductive film which presses at the outer side of the metal silk screen in a superposing way, the single-surface conductive film consists of a medium insulating layer and a conductive layer, and the conductive layer and the metal silk screen are tightly contacted with the insulating layers outside the current carrying core wires. The electric cable has the advantages of reliable structure and high detection stability so as to ensure safe running of an electric apparatus product. In addition, the electric cable is simple to manufacture and can remarkably lower the cost of an electric leakage detection lead.
Description
Technical field
The utility model relates to the lead that is used for conductivity, particularly relates to a kind of cable with detection of electrical leakage function.
Background technology
The alternating current cable generally includes three current-carrying heart yearns that are respectively applied for the live wire, the neutral line and the earth connection that connect power supply, three heart yearns are surrounded by insulating barrier outward respectively and are isolated from each other, and outside three heart yearns, be surrounded by insulation sheath, in general, the current-carrying heart yearn is a copper, and insulating barrier and crust are that flexible insulation materials such as rubber or plastics are made.
In long-term use, the reason such as aging or mechanical damage owing to insulating barrier, regular meeting causes between live wire, the neutral line and the earth connection leakage current generating being arranged.Leakage current can initiation fire and personal safety is threatened, and need do one's utmost to avoid.In order to detect and to reduce leakage current, prior art has adopted multiple means.The most direct is that the coverage rate that will be woven into by copper cash fully is 85% or higher wire netting leakage current detecting layer, this is to be subjected to the enlightenment of existing anti-static shielding net and to migrate, but the wire netting cost of density is too high like this, and the density that reduces wire netting then can cause leakage current to detect poor effect.
For example, application number is CN200520063686.5, the Chinese patent of " a kind of shielded type cable " by name discloses a kind of shielded type cable, as shown in Figure 1, this cable comprises metal core A, insulating barrier B, gauze screen D and outer layer insulation sheath E, wherein metal core A is by the live wire L of mutually insulated, zero line N and ground wire G constitute, it is characterized in that, be provided with one deck shielded film C between the insulating barrier B of live wire L, the zero line N of core and gauze screen D, core A, insulating barrier B, shielded film C, gauze screen D, outer layer insulation sheath E set gradually from inside to outside.
In order to reduce the use of high desnity metal net, application number is CN200720149261.5, the Chinese utility model patent of " a kind of power line that utilizes metal forming to survey leakage current " by name discloses a kind of power line that utilizes metal forming to survey leakage current, it is by two current-carrying copper cores, be wrapped in the insulating barrier of two current-carrying copper cores outside and be wrapped in two outmost outermost layer insulating barriers of current-carrying copper core and constitute respectively, and it is characterized in that: 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 (coverage rate 2%) in the outside of metal forming.Its thinking is that detection of electrical leakage is divided into two parts, and elder generation uses than the metal forming of thin conduction and wraps up the wherein outside of two copper core insulating barriers, and then wraps up the metal forming of conducting electricity with sparse metal organization level, wishes to reduce whereby the cost of power line.
But above-mentioned dual mode utilizes metal forming in design and manufacturing problem to be arranged all as the detection of electrical leakage media.Thereby using metal forming is because of the thin economical with materials of its matter, but thin metal forming is crisp, frangible, can only spread out and is not suitable for convolution with flat state in the time of most of.In the prior art condition next be difficult to will be independent thin metal forming be coated on outside the insulating barrier of heart yearn, the 2nd, even if with very high technology cost with its coat go up after, in use very easily metal forming is ruptured because of the bending fold of cable.Use the thick metal level obviously can head it off, but save the first of cost and decline like that, and make cable weight increase, not as good as using the high desnity metal silk screen once also having departed from.
Summary of the invention
The purpose of this utility model is, overcomes the above-mentioned defective of prior art, and a kind of low-cost and high-quality is provided, easily manufactured detection of electrical leakage mode and the cable with detection of electrical leakage function.
For this reason, the utility model provides a kind of cable with detection of electrical leakage function, comprise three current-carrying heart yearns, every current-carrying heart yearn is coated with insulating barrier outward respectively, outermost layer at described cable is coated with insulation sheath, it is characterized in that, also be coated with the detection of electrical leakage layer outside at least one insulating barrier in described three current-carrying heart yearns, described detection of electrical leakage layer is made of the single face conducting film that woven wire and its outside laminate, described single face conducting film is for to be made of a dielectric insulation layer and a film conductive layer, and described film conductive layer closely contacts with the outer insulating barrier of woven wire and current-carrying heart yearn.
Preferably, have in described three current-carrying heart yearns outside two the insulating barrier also to be coated with the detection of electrical leakage layer respectively, described two current-carrying heart yearns that are coated with the detection of electrical leakage layer are respectively in order to connect the live wire and the neutral line of power supply.
Wherein, described dielectric insulation layer is polyester film or insulating paper etc.Described film conductive layer is non-metal conductor or metallic conductor.
Wherein, the coverage rate of described woven wire is more than 10%.The material of described woven wire can be copper or aluminium or iron.
Wherein, described insulation sheath and coat the outermost detection of electrical leakage layer of described current-carrying heart yearn or insulating barrier between be filled with insulation filler.
The beneficial effects of the utility model are, reliable in structure, and it is high to detect stability, thereby can guarantee the safe operation of electric equipment products.And cable manufacturing of the present utility model is simple, can show to reduce the cost that leakage current detects lead.
Description of drawings
Fig. 1 is the generalized section of prior art cable;
Fig. 2 is the generalized section of cable of the present utility model.
Description of reference numerals:
1-current-carrying heart yearn; The 2-insulating barrier; The 3-woven wire; The 4-film conductive layer; The 5-dielectric insulation layer; The 6-filler; The 7-insulation sheath; The G-earth connection; The L-live wire; The N-neutral line.
Embodiment
The cable preferred embodiment that the utlity model has the detection of electrical leakage function as shown in Figure 2.Wherein cable comprises three current-carrying heart yearns 1, and every current-carrying heart yearn 1 outer insulating barrier 2 that is coated with respectively is coated with insulation sheath 7 at the outermost layer of described cable.In general, live wire, the neutral line and the earth connection of three current-carrying heart yearn 1 difference corresponding power.For carrying out detection of electrical leakage, to be coated with the detection of electrical leakage layer outside at least one insulating barrier in described three current-carrying heart yearns, the detection of electrical leakage layer is made of the single face conducting film that woven wire 3 and its outside laminate in the utility model, described single face conducting film is for to be made of a dielectric insulation layer 5 and a film conductive layer 4, and described film conductive layer 4 closely contacts with the outer insulating barrier 2 of woven wire 3 and current-carrying heart yearn.
Usually, needing most what carry out that leakage current detects is the live wire and the neutral line, and therefore in the present embodiment, live wire L and neutral line N are respectively the composite construction of current-carrying heart yearn 1, insulating barrier 2 and detection of electrical leakage layer, and earth connection G does not then contain the detection of electrical leakage layer.For the intensity that increases cable with keep the globality of its structure, can between the outermost layer of live wire L, neutral line N, earth connection G and insulation sheath, fill the filler 6 of some insulation, for example cotton thread.
Wherein, current-carrying heart yearn 1, insulating barrier 2, insulation sheath 5 and filler 6 all can use existing suitable material and product in the prior art.Below in conjunction with Fig. 2, highlight the structure of detection of electrical leakage layer of the present utility model.
Woven wire closely is coated on the insulating barrier outside of the live wire and the neutral line, mainly drains into detecting unit in order to the leakage current of detection live wire, the neutral line and with detected leakage current.Wherein, the coverage rate of woven wire need not too high, get final product more than 10%, approximately the coverage rate scope of 10%-40% is that the balance leakage current detects a preferable practical range that draws after effect and weight and the Financial cost, but the coverage rate of woven wire is not limited to this scope.Described woven wire can use wires such as copper, aluminium, iron wire to constitute.In general, woven wire preferably uses braiding, because the silk screen of printing ruptures easily at the place, crosspoint, flexibility is poor.
It is crucial that woven wire closely contacts with the insulating barrier of the live wire and the neutral line.Simultaneously, be surrounded by the single face conducting film in the woven wire outside, the inboard of single face conducting film is a film conductive layer, and the outside is a dielectric insulation layer.Film conductive layer closely contacts with woven wire, then contacts with insulating barrier outside the current-carrying heart yearn at the mesh place of woven wire.Such structure can further increase the effect that leakage current detects, and when thin film metal layer detects the leakage current of insulating barrier, the leakage current signal can be transmitted to woven wire effectively, is transmitted to specific leakage current detecting unit effectively by woven wire.So the two has realized that to whole insulating barrier comprehensive engagement can detect timely and effectively to the electric leakage of any position owing to woven wire+film conductive layer, and to leakage current realization guiding fast.
Film conductive layer can be a nonmetal conductor material, for example the allotrope conductive structure of graphite, carbon ink or other carbon; Also can be metallic conductor, for example copper, aluminium, tin etc.Dielectric insulation layer then can be various polymerization insulation macromolecular material, for example polyester, polyamide or insulating papers etc.
Preferably, this single face conducting film can be on the basis of polyester film or insulating paper, by the mode sputter layer of metal conductive layer of vacuum splashing and plating, and as copper, aluminium, tin etc., and the composite construction that obtains; Or,, be combined in polyester film or the last composite construction that obtains of insulation by modes such as spraying, printings as graphite, carbon ink etc. with non-metal conductor.
With among the CN200520063686.5 shielded film C is located in the gauze screen D different, the utility model wire netting is located at the inboard and the single face conducting film be located at the outside.On the one hand, can utilize the good toughness of dielectric insulation layer to provide support, thereby can make thin film metal layer reach the degree thinner, and single face conducting film composite construction can provide than metal forming better intensity than common metal paper tinsel for thin film metal layer, prevent fracture, guarantee functional reliability; On the other hand, thin film metal layer is located at the woven wire outside, can provide the leakage current area of detection effectively to replenish and promote, thereby have better accuracy of detection; The third aspect, because dielectric insulation layer is positioned at outermost one deck of whole detection of electrical leakage layer, being equivalent to provides the second protection measure again for leakage current.In addition, dielectric insulation layer outermost one deck of being positioned at whole detection of electrical leakage layer has also overcome and shielded film C is located at the leakage current that makes that is brought within the gauze screen D is difficult for the defective that detects.
More than be illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall in the protection range of the present utility model all.
Claims (9)
1. cable with detection of electrical leakage function, comprise three current-carrying heart yearns, every current-carrying heart yearn is coated with insulating barrier outward respectively, outermost layer at described cable is coated with insulation sheath, it is characterized in that, also be coated with the detection of electrical leakage layer outside at least one insulating barrier in described three current-carrying heart yearns, described detection of electrical leakage layer comprises the single face conducting film that woven wire and its outside laminate, described single face conducting film is for to be made of a dielectric insulation layer and a film conductive layer, and described film conductive layer closely contacts with the outer insulating barrier of woven wire and current-carrying heart yearn.
2. the cable with detection of electrical leakage function according to claim 1, it is characterized in that, have in described three current-carrying heart yearns outside two the insulating barrier also to be coated with the detection of electrical leakage layer respectively, described two current-carrying heart yearns that are coated with the detection of electrical leakage layer are respectively in order to connect the live wire and the neutral line of power supply.
3. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the dielectric insulation layer of described single face conducting film is polyester film or insulating paper.
4. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, described film conductive layer is non-metal conductor or metallic conductor.
5. the cable with detection of electrical leakage function according to claim 4 is characterized in that, described film conductive layer is metallic conductor copper, aluminium or tin, and described metallic conductor passes through the vacuum splashing and plating mode attached on the described dielectric insulation layer.
6. the cable with detection of electrical leakage function according to claim 4 is characterized in that, described film conductive layer is non-metal conductor graphite or carbon ink, described non-metal conductor by the spraying or mode of printing attached on the described insulating barrier.
7. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the coverage rate of described woven wire is more than 10%.
8. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the material of described woven wire is copper or aluminium or iron.
9. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, described insulation sheath and coat the outermost detection of electrical leakage layer of described current-carrying heart yearn or insulating barrier between be filled with insulation filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202160809U CN201489886U (en) | 2009-09-11 | 2009-09-11 | Electric cable with electric leakage detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202160809U CN201489886U (en) | 2009-09-11 | 2009-09-11 | Electric cable with electric leakage detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489886U true CN201489886U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202160809U Expired - Lifetime CN201489886U (en) | 2009-09-11 | 2009-09-11 | Electric cable with electric leakage detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489886U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024520B (en) * | 2009-09-11 | 2012-04-25 | 通领科技集团有限公司 | Cable with leakage detection function |
| CN104007363A (en) * | 2014-06-05 | 2014-08-27 | 安徽江淮汽车股份有限公司 | Electric wire and short circuit alarm circuit |
| CN106229065A (en) * | 2016-09-28 | 2016-12-14 | 广东美的制冷设备有限公司 | Power line and electric equipment |
| CN106229064A (en) * | 2016-09-28 | 2016-12-14 | 广东美的制冷设备有限公司 | Power line and electric equipment |
-
2009
- 2009-09-11 CN CN2009202160809U patent/CN201489886U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024520B (en) * | 2009-09-11 | 2012-04-25 | 通领科技集团有限公司 | Cable with leakage detection function |
| CN104007363A (en) * | 2014-06-05 | 2014-08-27 | 安徽江淮汽车股份有限公司 | Electric wire and short circuit alarm circuit |
| CN106229065A (en) * | 2016-09-28 | 2016-12-14 | 广东美的制冷设备有限公司 | Power line and electric equipment |
| CN106229064A (en) * | 2016-09-28 | 2016-12-14 | 广东美的制冷设备有限公司 | Power line and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140915 Granted publication date: 20100526 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150915 Granted publication date: 20100526 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20151014 Granted publication date: 20100526 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160414 Granted publication date: 20100526 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |