CN201489885U - Cable with function of electric leakage detection - Google Patents
Cable with function of electric leakage detection Download PDFInfo
- Publication number
- CN201489885U CN201489885U CN2009202160796U CN200920216079U CN201489885U CN 201489885 U CN201489885 U CN 201489885U CN 2009202160796 U CN2009202160796 U CN 2009202160796U CN 200920216079 U CN200920216079 U CN 200920216079U CN 201489885 U CN201489885 U CN 201489885U
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- detection
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- cable
- electrical leakage
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Abstract
The utility model relates to a cable with a function of electric leakage detection, comprising three current-carrying core wires, wherein the outside of each current-carrying core wire is coated with an insulation layer; the current-carrying core wires are mutually insulated; and the outermost layer of the cable line is coated with an insulation sheath. The cable is characterized in that the outside of the insulation layer of at least one of the three current-carrying core wires is also coated with an electric leakage detection layer; and the electric leakage detection layer comprises a tightly contacted knitting metal wire mesh and a plurality of drain leads. The utility model can effectively conduct leakage current to an electric leakage detection device, and the detection reliability is high, thereby the safe operation of electrical products can be ensured, and the costs of leakage current detection leads can be obviously reduced.
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, at application number is CN200720173349.0, disclose a kind of power line that has the detection of electrical leakage conductor in the Chinese utility model patent of by name " power line that has the detection of electrical leakage conductor ", it is made of the detection of electrical leakage conductor that three current-carrying copper cores and at least one are used to detect leaky.The outside of three copper cores is coated with a layer insulating respectively; And the outside of at least two copper core insulating barriers is coated with the layer of metal conductive layer therein.The described detection of electrical leakage conductor that is used to detect leaky contacts with metal conducting layer.Outermost at two current-carrying copper cores and detection of electrical leakage conductor is enclosed with one deck outermost layer insulating barrier.Wherein, the described metal conducting layer that is coated on wherein two copper core insulating barrier outsides can be one deck Copper Foil or one deck tinfoil paper or one deck aluminium foil; Described detection of electrical leakage conductor can be copper cash or aluminum steel.
Again for example, application number is CN200720149261.5, the Chinese utility model 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, uses the wherein outside of two copper core insulating barriers of the thin metal forming parcel that conducts electricity earlier, and then knits the metal forming that volume layer parcel conducts electricity with sparse metal, 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 slightly metal forming obviously can head it off, but save the original intention of cost 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, solves the problems referred to above of prior art, and a kind of detection of electrical leakage mode of low-cost and high-quality and the cable with detection of electrical leakage function are provided.
For this reason, the utility model provides a kind of cable with detection of electrical leakage function, it comprises 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 braided metal silk screen and the Duo Gen drainage lead of tight contact.
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, the coverage rate of described braided metal silk screen is more than 20%.
Wherein, the diameter of described drainage lead is greater than the diameter wiry of described braided metal silk screen, is 1.5 to 2.5 times of diameter wiry.
Wherein, the quantity of described drainage lead is 5 to 10.
Wherein, the material of described woven wire, drainage lead is copper or aluminium or iron or three's combination.
Wherein, be filled with insulation filler between the outermost detection of electrical leakage layer of described insulation sheath and described current-carrying heart yearn or the insulating barrier.
The beneficial effects of the utility model are, can be timely and effectively with leakage conduction to leak current detection device, the detecting reliability height, thus can guarantee the safe operation of electric equipment products, and can significantly reduce the cost that leakage current detects lead.
Description of drawings
Fig. 1 is the generalized section that the utlity model has the cable preferred embodiment of detection of electrical leakage function;
Fig. 2 is the expansion schematic diagram that the utlity model has the cable detection of electrical leakage layer of detection of electrical leakage function.
Description of reference numerals:
1-current-carrying heart yearn; The 2-insulating barrier; 3-drainage lead; The 4-woven wire; The 5-insulation sheath; The 6-filler; The L-live wire; The N-neutral line; The G-earth connection.
Embodiment
The cable preferred embodiment that the utlity model has the detection of electrical leakage function as shown in Figure 1.Wherein cable comprises three current-carrying heart yearns 1, and every current-carrying heart yearn 1 is outer to be coated with insulating barrier 2 respectively, so that the current-carrying heart yearn is insulated from each other, is coated with insulation sheath 5 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 comprises the woven wire 4 and the Duo Gen drainage lead 3 of the braiding of tight contact in the utility model.
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.Certainly also can be at the outer detection of electrical leakage layer that increases of ground wire G, just cost can increase.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.Highlight the structure of detection of electrical leakage layer of the present utility model below.See also the expansion schematic diagram of the utility model detection of electrical leakage layer shown in Figure 2.
The detection of electrical leakage layer comprises drainage lead 3 and woven wire 4, and this drainage lead 3 closely contacts with the insulating barrier of woven wire 4 with the live wire or the neutral line.So that can carry out reliable detection to leakage current.Wherein, the coverage rate of woven wire need not too high, get final product greater than 20%, approximately the coverage rate scope of 20%-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.In general, in order to save cost, the wire that is used for the braided metal silk screen is relatively thinner, this just causes woven wire to fracture easily, the utility model is by the setting of drainage lead, can guarantee the reliable conduction of electric current, for this reason, the diameter of drainage lead 3 is more preferably greater than the diameter wiry of braided metal silk screen.In the embodiment of Fig. 2, drainage lead 3 is many and is arranged in parallel, outside being wound into insulating barrier after, the drainage lead can be parallel to current-carrying heart yearn 1 or equidistantly arrange around current-carrying heart yearn 1 spirality.But be not that the drainage lead cannot intersect, the drainage arrangement of conductors of intersection can be used for realizing the utility model equally, is the effect difference, and the drainage conductor length of intersection increases relatively, but can more cover the zones of different of woven wire.Wherein, parallel drainage lead is easy to process, and is more economical and practical.
According to preferred embodiment of the present utility model, can select 5-10 root drainage lead for use, the diameter that makes the drainage lead more preferably greater than the 1.5-3 of the diameter wiry of braided metal silk screen doubly, the 1.5-2.5 that is preferably diameter wiry is doubly.For example, select the woven wire of 7 drainage leads, 30% coverage rate for use, and make the diameter of drainage lead be about 1.5 times of wire diameter.
Wherein the drainage lead can be the lead that wire commonly used such as copper, aluminium, iron constitutes.Described woven wire can use wires such as copper, aluminium, iron wire to constitute equally.In general, woven wire preferably uses braiding, because the silk screen of printing ruptures easily at the place, crosspoint, flexibility is poor.
Than prior art, the utility model uses the detection of electrical leakage structure of drainage lead+woven wire to have outstanding advantage.The media that the woven wire that uses medium level of coverage detects as leakage current, can be when reliably finding out leakage current the economical with materials cost, alleviate the weight of cable and reduce cost; What cooperate that the drainage lead then can utilize the drainage lead is transmitted to electric current corresponding leakage current electric probe device reliably, for example leakage current sense switch etc.Because the drainage lead can use thicker wire, overcome when only using woven wire on the one hand, because of the woven wire fracture causes the not smooth defective of conduction of current, when woven wire is damaged, provide reliable conduction of current easily by the drainage lead; On the other hand, because the drainage lead is less with respect to woven wire resistance, leakage current can improve accuracy of detection by the woven wire transmission; The third aspect, the drainage lead of increase itself also can be used as the intensity that " skeleton " increases woven wire.
Whether being used for cable of the present utility model, to be suitable for detecting rapidly and accurately the insulation of electric wire good, and therefore this power line can be applied on all household electrical appliance, is particularly suitable for using on powerful consuming devices such as air-conditioning, water heater.
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 woven wire and the Duo Gen drainage lead of tight contact.
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 coverage rate of described woven wire is more than 20%.
4. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the diameter of described drainage lead is greater than the diameter wiry of described woven wire.
5. the cable with detection of electrical leakage function according to claim 4 is characterized in that, the diameter of described drainage lead is 1.5 to 2.5 times of diameter wiry of described woven wire.
6. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the quantity of described drainage lead is 5 to 10.
7. 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.
8. the cable with detection of electrical leakage function according to claim 1 and 2 is characterized in that, the material of described drainage lead 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, is filled with insulation filler between the outermost detection of electrical leakage layer of described insulation sheath and described current-carrying heart yearn or the insulating barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202160796U CN201489885U (en) | 2009-09-11 | 2009-09-11 | Cable with function of electric leakage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202160796U CN201489885U (en) | 2009-09-11 | 2009-09-11 | Cable with function of electric leakage detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489885U true CN201489885U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202160796U Expired - Fee Related CN201489885U (en) | 2009-09-11 | 2009-09-11 | Cable with function of electric leakage detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489885U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489300A (en) * | 2015-12-18 | 2016-04-13 | 浙江炬泰新材料科技有限公司 | Cable with electric leakage detection function |
| CN110376476A (en) * | 2019-07-25 | 2019-10-25 | 云南电网有限责任公司电力科学研究院 | A kind of dynamic monitoring and positioning system and the method for leaking electricity of Passive self-starting based on wisdom conducting wire |
-
2009
- 2009-09-11 CN CN2009202160796U patent/CN201489885U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489300A (en) * | 2015-12-18 | 2016-04-13 | 浙江炬泰新材料科技有限公司 | Cable with electric leakage detection function |
| CN110376476A (en) * | 2019-07-25 | 2019-10-25 | 云南电网有限责任公司电力科学研究院 | A kind of dynamic monitoring and positioning system and the method for leaking electricity of Passive self-starting based on wisdom conducting wire |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20140911 |
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| EXPY | Termination of patent right or utility model |