CN201741426U - Prebranch cable - Google Patents
Prebranch cable Download PDFInfo
- Publication number
- CN201741426U CN201741426U CN2010201305714U CN201020130571U CN201741426U CN 201741426 U CN201741426 U CN 201741426U CN 2010201305714 U CN2010201305714 U CN 2010201305714U CN 201020130571 U CN201020130571 U CN 201020130571U CN 201741426 U CN201741426 U CN 201741426U
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- China
- Prior art keywords
- backbone
- branch line
- branched cable
- separator
- insulating barrier
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a prebranch cable. The prebranch cable comprises a protective layer formed by that a connector connecting the branch line and the main line is sealed with part protective layers of the main line and the branch line by injecting rubber. The prebranch cable based on the technical proposal has the advantages of reliable connection, good adaptability and long service life.
Description
Technical field
The utility model relates to a kind of pre-branched cable, belongs to pre-formed branch cable technical field.
Background technology
Outer protective sleeve, primary insulation on one section backbone cable that the present method of making the rubber pre-branched cable is first strip off select location make its metallic conductor exposed; Again the branch line cable is peelled off sheath, insulation, expose and fall it behind the cable end and be crimped on the backbone cable metal conductor of peelling off insulation.Described crimping is carried out the crimping moulding by the conductor connector, and this moulding process carries out compression molding to the joint of this crimping moulding with vulcanizing press at last.This method is owing to need vulcanizing press, and branch line is the crimping moulding with being connected of backbone, and not only difficulty is big, and the connection resistance of crimping moulding is big, and useful life is short.And the joint outward appearance is uneven easily, and is rough, and reliability, consistency are poor, and the junction bonding strength of protective layer is low in addition, is difficult to use in that wet environment is medium-term and long-term.The method production cycle of mold pressing is long, and the rubber-covered employing of this moulding process of application at present is that natural/butylbenzene is the material of main body simultaneously, and its insulation property are difficult to guarantee the insulation property of rubber pre-branched cable well below second third electro-insulating rubber.
Thereby in numerous cable use occasions, the joint of backbone cable and branch line cable is handled, and has just become the outstanding problem in confession, the electric power distribution network construction.The rubber pre-branched cable is used widely in buried, middle-high building, tunnel, mine, airport, harbour and modernized Standard Factory Room, but because of the problems referred to above, enables and should be subjected to certain restriction.
In order to improve joint efficiency, a kind of pre-branched cable manufacture method that the metal case fastens sealing of passing through has also appearred at present, and this method is connected backbone earlier with branch line, do the insulation processing then, fastens and be fastenedly connected by described metal case afterwards to form.Because of metal case self can not contribute to bonding strength, in order to reach reliable connection, the core of backbone and branch line also needs extra connector to be connected usually, complex structure, and bonding strength can't guarantee.In addition, the syndeton poor sealing performance of this fastening, serviceability is poor under rugged environment.
Summary of the invention
Therefore, the purpose of this utility model is to provide a kind of connection reliable, and applicability is good, and the pre-branched cable of long service life.
The utility model pre-branched cable comprises the branch line and the backbone of electric connection, and the metallic conductor that described branch line exhumes in advance with the backbone connecting portion and when being connected is coated with separator and insulating barrier; And this pre-branched cable comprises also that described branch line is connected formed joint and backbone and branch line with backbone partial protection layer injection rubber is packaged into one and the protective layer that forms.
Based on the pre-branched cable of first aspect of the utility model, adopt the protective layer of injection rubber encapsulated moulding, and mainly carry external stress; and branch line is with after the backbone core is connected; what form basically is to electrically connect, and seldom carries external stress, has guaranteed the reliability that connects.On the other hand, because injection rubber encapsulation can form tight protection, in humidity or corrosive atmosphere lower contact with can obtain good protection, extended the scope of application of pre-branched cable greatly.
Further, the injection rubber-moulding all will dispose mould, can guarantee the consistency of joint in this case.
Above-mentioned pre-branched cable, described branch line is vertically connected on the described backbone.
Above-mentioned pre-branched cable, a core of described branch line axially is arranged in order connection along described backbone.
Above-mentioned pre-branched cable, described joint integral body is triangular in shape.
Above-mentioned pre-branched cable, the welding of the metallic conductor that is connected to corresponding core of described branch line and backbone.
Above-mentioned pre-branched cable, the thickness of described separator are not less than the thickness of the master core separator of described backbone; The thickness of described insulating barrier is not less than the thickness of the master core insulating barrier of described backbone.
Above-mentioned pre-branched cable, totally three layers of described separator box insulating barriers, wherein insulating barrier forms the intermediate layer, and separator forms two-layer in addition.
Description of drawings
Below in conjunction with Figure of description the technical solution of the utility model is further described, makes those skilled in the art better understand the utility model, wherein:
Fig. 1 is the structural representation of the utility model pre-branched cable embodiment.
1, master core, 2, main metallic conductor, 3, joint, 4, insulating barrier, 5, separator, 6, a metallic conductor, 7, protective layer, 8, backbone, 9, a core, 10, branch line.
Embodiment
With reference to Figure of description 1, it shows a kind of pre-branched cable, comprises the branch line 10 and the backbone 8 of electric connection, and the metallic conductor that described branch line exhumes in advance with the backbone connecting portion and when being connected is coated with separator 5 and insulating barrier 4; And this pre-branched cable comprises also that described branch line is connected formed joint 3 and backbone and branch line with backbone partial protection layer injection rubber is packaged into one and the protective layer 7 that forms.
About the protective layer that this programme adopted; because this protective layer is that a kind of sealing grade is than higher protective layer; and this protective layer also plays interconnect function; as previously mentioned; the corresponding reduction of the connection request of butt joint; about the selection of described electric connection and separator, insulating barrier, can select existing means for use basically, also can satisfy the instructions for use under this programme condition.
Syndeton as for branch line and backbone, those skilled in the art also can have more selection, and under any version, the structural strength of connection and reliability can both be guaranteed, thereby can make this pre-branched cable that wider practicality is arranged.Preferably, described branch line is vertically connected on the described backbone, promptly forms the T type of often saying this area and connects, and can obtain maximum connection reliability in theory.
Further, in order to improve the reliability of connection, a core 9 of described branch line axially is arranged in order connection along described backbone, like this, be convenient to the setting of separator and insulating barrier, and have enough spaces to isolate and insulate between each contact and between the core bare exposed conductor.Based on this, those skilled in the art may expect the circumferential distribution of contact, Comparatively speaking, though all considered the reliability of isolating and insulating, but axial distribution is more reasonable, circumferentially distribution ought to be that a kind of deterioration substitutes, and the cabling of the core that circumferentially distributes also is easy to generate interference, and manufacture difficulty is also big.
Based on the joint of said structure, its structural entity is triangular in shape, has also comprised described protective layer here, and stress is disperseed, and further improves the reliability that connects.
Preferably, the welding of the metallic conductor that is connected to corresponding core of described branch line and backbone, connection reliability is better, and for low-voltage cable or communication cable, is welded on the selection that is inevitable to a certain extent.In order to reduce connection resistance, this programme preferred weld form reduces aging that the joint local overheating causes.
A particular requirement, the thickness of described separator are not less than the thickness of master core 1 separator of described backbone; The thickness of described insulating barrier is not less than the thickness of the master core insulating barrier of described backbone.Certainly, what consider here is the situation that separator and insulating barrier have used original isolated material of current core and insulating material, in order to reach under the situation that is not less than the electric index of current core, selects this technological means.Nature also can adopt isolation performance and insulation property better material, to reduce the size of joint, also is a kind of reasonable selection.
Preferably, totally three layers of described separator box insulating barriers, wherein insulating barrier forms the intermediate layer, and separator forms two-layer in addition, can make reliability of structure better.
Based on above-mentioned pre-branched cable, this programme provides a kind of method, and it may further comprise the steps:
A) precalculated position of backbone is connected the termination with branch line and peels off moulding by connection request;
B) electrically connect backbone and branch line;
C) metallic conductor of exposed backbone and branch line is carried out currently being electrically connected the colligation of the class of insulation to form separator and insulating barrier; And
D) described branch line is connected formed joint 3 with backbone and injects rubber-moulding with the partial protection layer of backbone and branch line.
Said method, those skilled in the art can select or make up following technological means:
Described backbone adopts welding with being connected of branch line, makes to connect resistance less than predetermined resistance.
The moulding of described notes rubber is that the partial protection layer with described joint and backbone and branch line places in a molding chamber, adopts rubber injection machine injection formation rubber cover.Rubber cover has certain rigidity and pliability, is convenient to the layout of connector.
For the ease of making, first colligation first separator of described step c), rubber-coated then insulating barrier twines second separator afterwards, annotates the rubber protective layer at last.
Preferably, described first separator is selected polyester belt for use.
Described polyester belt selects for use heatproof degree grade at 150 ℃ polyurethane tape.
Described second separator is selected nonwoven fabric belts for use.
In order to reach needed isolation effect, the thickness of described second separator is 0.07～0.10mm.
The insulating barrier of described coating is that second third glue is the insulating barrier of main body.
Described notes rubber protective layer is the rubber cover based on haloflex.
Claims (7)
1. pre-branched cable comprises it is characterized in that the branch line (10) and the backbone (8) of electric connection: the metallic conductor that described branch line exhumes in advance with the backbone connecting portion and when being connected is coated with separator (5) and insulating barrier (4); And this pre-branched cable comprises also that described branch line is connected formed joint (3) and backbone and branch line with backbone partial protection layer injection rubber is packaged into one and the protective layer (7) that forms.
2. pre-branched cable according to claim 1 is characterized in that: described branch line is vertically connected on the described backbone.
3. pre-branched cable according to claim 2 is characterized in that: a core (9) of described branch line axially is arranged in order connection along described backbone.
4. pre-branched cable according to claim 3 is characterized in that: described joint integral body is triangular in shape.
5. according to the arbitrary described pre-branched cable of claim 1 to 4, it is characterized in that: the welding of the metallic conductor that is connected to corresponding core of described branch line and backbone.
6. pre-branched cable according to claim 5 is characterized in that: the thickness of described separator is not less than the thickness of the master core of described backbone (1) separator; The thickness of described insulating barrier is not less than the thickness of the master core insulating barrier of described backbone.
7. pre-branched cable according to claim 6 is characterized in that: totally three layers of described separator box insulating barriers, and wherein insulating barrier forms the intermediate layer, and separator forms two-layer in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201305714U CN201741426U (en) | 2010-03-15 | 2010-03-15 | Prebranch cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201305714U CN201741426U (en) | 2010-03-15 | 2010-03-15 | Prebranch cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201741426U true CN201741426U (en) | 2011-02-09 |
Family
ID=43556704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201305714U Expired - Fee Related CN201741426U (en) | 2010-03-15 | 2010-03-15 | Prebranch cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201741426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494001A (en) * | 2018-12-25 | 2019-03-19 | 广州电缆厂有限公司 | A kind of electric wire and its processing method of multiple spot wiring |
-
2010
- 2010-03-15 CN CN2010201305714U patent/CN201741426U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494001A (en) * | 2018-12-25 | 2019-03-19 | 广州电缆厂有限公司 | A kind of electric wire and its processing method of multiple spot wiring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20130315 |