CN102347598A - Cable terminal with stress pipe - Google Patents
Cable terminal with stress pipe Download PDFInfo
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- CN102347598A CN102347598A CN201110242087XA CN201110242087A CN102347598A CN 102347598 A CN102347598 A CN 102347598A CN 201110242087X A CN201110242087X A CN 201110242087XA CN 201110242087 A CN201110242087 A CN 201110242087A CN 102347598 A CN102347598 A CN 102347598A
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- cable
- stress tube
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- tube
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Abstract
The invention discloses a cable terminal with a stress pipe, which solves the problem of poor dispersing effect of an electric field generated by a stress pipe arranged in the traditional cable terminal on the cable stripping end. The cable terminal with the stress pipe comprises a cable and a silicon rubber cable terminal sleeve, wherein the cable comprises a line core, an insulating layer, an outer shield and an outer jacket in sequence from inside to outside; the end part of the cable is stripped at a certain size in sequence; a plurality of annular umbrella skirts are arranged on the peripheral surface of the silicon rubber sleeve in parallel; the silicon rubber sleeve is sleeved at the periphery of the insulating layer of the cable stripping end; a stress pipe which is sleeved at the periphery of the cable stripping end is arranged in the silicon rubber sleeve; the stress pipe is made of insulating silicon rubber, conducting silicon rubber, nano barium titanate and nano titanium dioxide; the stress pipe comprises an outer-layer stress pipe and an inner-layer stress pipe; the outer-layer stress pipe and the inner-layer stress pipe are coaxially sleeved together; the dielectric constant of the outer-layer stress pipe is between 12 and 20; and the dielectric constant of the inner-layer stress pipe is between 20 and 30.
Description
Technical field
The present invention relates to a kind of cable termination, relate in particular to a kind of cable termination that has stress tube.
Background technology
China's utility model patent (patent No.: disclose a kind of three core crosslinked cable cold-shrink type terminals 200820217967.5); These terminals are provided with the compenzine core; Be with the shrinkage insulated tube on the core; One end of per share core is provided with terminal; The terminal below is provided with sealed tube; The middle part of core, shrinkage insulated tube are provided with the single hole Rain-proof skirt; The other end of compenzine core passes the hole of three hole Rain-proof skirts respectively and is bundled together by silicone rubber jacket; Silicone rubber jacket is provided with the shrinkage gloves outward, is provided with earth connection between shrinkage gloves and silicone rubber jacket.Be provided with copper shield in the said silicone rubber jacket.When the utility model has been simplified original cold-shrink type terminals structure, improved its fail safe during practical application on power circuit.
In the Chinese utility model patent (patent No.: disclose a kind of monolithic devices shrinkage cable termination 200920261849.9); It comprises the cable termination body and is wrapped in the protective layer that the shrinkage material on the said body surface is processed that said protective layer is continuous integrative-structure.The monolithic devices shrinkage cable termination that the utility model provides; Cause becomes continuous integrative-structure fully at the outer surface of the monolithic devices shrinkage cable termination body of monolithic devices shrinkage cable termination; Avoid the terminal body to produce the surface insulation defective, take place thereby effectively reach the hidden danger of avoiding the power cable breakdown.In addition, above-mentioned monolithic devices shrinkage cable termination body supports through expansion and reaches the shrinkage effect.
But above-mentioned these two kinds of cable terminations in the non-uniform electric that the stripped end place of cable produces, are prone to occur in actual use electric stress and concentrate in the running of reality, and have influence on the fail safe of transmission line.
Summary of the invention
For overcoming above-mentioned defective, the technical issues that need to address of the present invention are: a kind of cut cable with stress tube is provided, and this cable termination formed field uniformity in the use of reality is good, can effectively improve the stability in the cable termination running.
In order to solve the technical problem; Technical scheme of the present invention: a kind of cable termination with stress tube; Comprise cable and silicone rubber for cable pot head; Described cable comprises core from inside to outside successively; Insulating barrier; External shield and oversheath; The end of cable is successively by the strip off certain size; Be provided with some circular full skirts on the outer peripheral face of said silicone rubber sleeve side by side; Described silicone rubber sleeve is socketed in the insulating barrier periphery of cable stripped end; In silicone rubber sleeve, be provided with the stress tube that is socketed in cable stripped end periphery; It is characterized in that; The material of preparation stress tube comprises electrically insulating silicone rubber; Conductive silicon rubber; Nano barium phthalate; Nano titanium oxide; Wherein, Electrically insulating silicone rubber accounts for 80%; Conductive silicon rubber accounts for 18%; Nano barium phthalate; Nano titanium oxide accounts for 2%; Said stress tube comprises outer stress tube and internal layer stress tube; Outer stress tube and internal layer stress tube connect together coaxially; The dielectric constant of outer stress tube is between 12-20, and the dielectric constant of internal layer stress tube is between 20-30.In this cable termination, be provided with stress tube, purpose is the electric field that disperses the cable termination place to form, in the hope of the stationarity in the cable termination use.Conductive silicon rubber generally is in silicon rubber, to be doped with carbon black.
As preferably, the two ends of said stress tube are socketed in respectively in the external shield and insulating barrier of cable.The electric field that cable termination produces herein is concentrated relatively, and this makes that the functioning efficiency of stress tube is high.
As preferably, the outer port part of said stress tube is concordant with the otch of cable jacket, and the exposed part of said cable external shield is coated by stress tube.Thereby further improved the dispersion effect of stress tube to electric field.
As preferably, the length of said internal layer stress tube is less than the length of outer stress tube.Cable termination in use, the electric field that is produced in the cable stripped end is radial arrangement, the size of inside and outside ply stress pipe limits and has further improved the dispersion effect of stress tube to electric field.
As preferably, the outer port part of said internal layer stress tube is concordant with the otch of cable jacket.The length of internal layer stress tube need not be set to long, and this has satisfied actual instructions for use well, and silicone rubber for cable pot head and the cable grazing after linking together is good.
As preferably, the length of said internal layer stress tube is slightly larger than half of outer stress tube length.The length of general internal layer stress tube is 150 millimeters, and the length of outer stress tube is 280 millimeters, and the qualification of inside and outside ply stress pipe size is convenient to their engage sleeves and is connected together, and they to be combined together the back good to the dispersion effect of electric field.
As preferably, be provided with the cavity volume of annular in the said outer stress tube, the internal layer stress tube is arranged in this cavity volume, and the radial depth of cavity volume is consistent with the wall thickness of internal layer stress tube.After the internal layer stress tube was plugged in the outer stress tube, it is level and smooth that their constitute the whole inner peripheral surface of stress tube, be convenient to realize and the cable stripped end between socket.
As preferably, the outer peripheral face of said silicone rubber for cable pot head is provided with the annular convex that is connected as a single entity with it, and annular convex is positioned at the position that internal layer stress tube and outer stress tube coincide.Annular convex is generally multiple tracks, and they are arranged on the outer peripheral face at silicone rubber for cable terminal side by side.The coincide position of part of the position of these annular convex on the silicone rubber for cable pot head and inside and outside ply stress pipe is corresponding; Can increase that the silicone rubber for cable pot head is internal, the binding force of outer stress tube; Make inside and outside ply stress pipe work good, guaranteed the dispersion effect of inside and outside ply stress pipe electric field.
Beneficial effect of the present invention is:
Owing in the silicone rubber for cable pot head, be provided with the internal layer stress tube and the outer stress tube of coaxial setting; The internal layer stress tube is after the electric field that cable stripped end place is produced disperses for the first time; Outer stress tube disperses the electric field after disperseing once more; With respect to the stress tube of single layer structure, the stress tube of hierarchy has significantly raising to the dispersion effect of cable electric field that stripped end produces.The stress tube of single layer structure will reach the dispersion effect of double-decker stress tube to electric field; The wall thickness of single layer structure stress tube should be the twice of double-decker stress tube wall thickness at least; The application of double-decker stress tube can help the miniaturization development of this cable termination, makes that the structural compactness of this cable termination is good.In stress tube, be doped with nano level barium titanate and titanium dioxide, can significantly improve the dielectric constant of stress tube, and the dielectric constant that shown of the double-decker stress tube dielectric constant that will be shown much larger than equal wall thickness single layer structure stress tube.The dielectric constant of inside and outside ply stress pipe is in described scope; This can satisfy the dispersion effect of stress tube to cable electric field that stripped end produces well; This electric field is through after the dispersion of inside and outside ply stress pipe; Good uniformity; Be difficult for producing electric stress and concentrate the good stability of this cable termination long-time running.
Description of drawings
Fig. 1 is the longitudinal sectional view of the cable termination of band stress tube of the present invention.
Embodiment
See among the figure that the structure of the cable termination of band stress tube of the present invention comprises cable and silicone rubber for cable pot head 5.Cable directly upwards comprises core 2, insulating barrier 4, external shield 8 and oversheath 9 from inside to outside successively, and they connect together coaxially.The end quilt of cable is the strip off certain size successively, and the length that constitutes each layer structure institute strip off of cable is differentiated, and the length of strip off is oversheath 9, external shield 8, insulating barrier 4 and core 2 from high to low successively.On cable was axial, being projected into outermost was core 2 ends, is insulating barrier 4 ends, external shield 8 ends and oversheath 9 ends then successively.The outer peripheral face of silicone rubber for cable pot head 5 is provided with the circular full skirt that plurality of parallel is provided with, and these full skirts and silicone rubber for cable pot head 5 are that homogeneous material is one-body molded.Silicone rubber for cable pot head 5 is socketed on the stripped end of cable, and the both ends of silicone rubber for cable pot head 5 are socketed in respectively on the outer peripheral face of insulating barrier 4 and oversheath 9.The outer end of core 2 and insulating barrier 4 all is projected into the outside of silicone rubber for cable pot head 5; On the outer end of core 2, be fixedly connected with copper outlet terminal 1; Between copper outlet terminal 1 and insulating barrier 4, be provided with rubber seal pipe 3, the two ends of rubber seal pipe 3 are socketed in copper respectively and go out on the outer peripheral face of terminal 1 and insulating barrier 4.
In silicone rubber for cable pot head 5, be provided with circular stress tube, the material of preparation stress tube comprises electrically insulating silicone rubber, conductive silicon rubber, nano barium phthalate, nano titanium oxide; Wherein, Electrically insulating silicone rubber accounts for 80%, and conductive silicon rubber accounts for 18%, and nano barium phthalate, nano titanium oxide account for 2%.The two ends of stress tube are socketed in respectively on the outer peripheral face of insulating barrier 4 and external shield 8; The outer port part of stress tube is concordant with the otch of oversheath 9; External shield 8 has part to expose in the outside of oversheath 9 because of the strip off of cable, and stress tube envelopes this exposed part of external shield 8.
Stress tube comprises internal layer stress tube 7 and outer stress tube 6, and internal layer stress tube 7 connects together with outer stress tube 6 coaxially.The outer port part of internal layer stress tube 7 is concordant with the otch of oversheath 9.The length of internal layer stress tube 7 is less than the length of outer stress tube 6, the outer port part of internal layer stress tube 7 basically with the outer port part flush of outer stress tube 6, the interior oral area of internal layer stress tube 7 is in the inside of outer stress tube 6.The length of internal layer stress tube 7 is slightly larger than half of outer stress tube 6 length.Be doped with the internal layer stress tube 7 of nanoscale metatitanic acid barium and titanium dioxide and the dielectric constant of outer stress tube 6 and have certain requirement, the dielectric constant of outer stress tube 6 is between 12-20, and the dielectric constant of internal layer stress tube 7 is between 20-30.Preferably, the dielectric constant of outer stress tube 6 is 15, and the dielectric constant of internal layer stress tube 7 is 25.
The inner peripheral surface of ply stress pipe 6 is provided with cavity volume outside; This cavity volume equals the wall thickness of internal layer stress tube 7 along the radial dimension of outer stress tube 6; The length of the outer stress tube in the edge of cavity volume 6 on axially is slightly less than the axial length of internal layer stress tube 7; Internal layer stress tube 7 is contained in the cavity volume, thereby makes the whole inner peripheral surface of stress tube that is made up of internal layer stress tube 7 and outer stress tube 6 show as smoothly.
For making the fitment stability between internal layer stress tube 7 and the outer stress tube 6 good; On the outer peripheral face of silicone rubber for cable pot head 5, be provided with the annular convex 10 that multiple tracks is set up in parallel; These annular convex 10 are connected as a single entity with silicone rubber for cable pot head 5; The position of these annular convex 10 on silicone rubber for cable pot head 5 outer peripheral faces is corresponding with the position that internal layer stress tube 7 and outer stress tube 6 coincide, and annular convex 10 is used for auxiliary silicon rubber cable pot head 5 and holds onto internal layer stress tube 7 and outer stress tube 6 securely.
Claims (8)
1. cable termination with stress tube; Comprise cable and silicone rubber for cable pot head; Described cable comprises core from inside to outside successively; Insulating barrier; External shield and oversheath; The end of cable is successively by the strip off certain size; Be provided with some circular full skirts on the outer peripheral face of said silicone rubber sleeve side by side; Described silicone rubber sleeve is socketed in the insulating barrier periphery of cable stripped end; In silicone rubber sleeve, be provided with the stress tube that is socketed in cable stripped end periphery; It is characterized in that; The material of preparation stress tube comprises electrically insulating silicone rubber; Conductive silicon rubber; Nano barium phthalate; Nano titanium oxide; Wherein, Electrically insulating silicone rubber accounts for 80%; Conductive silicon rubber accounts for 18%; Nano barium phthalate; Nano titanium oxide accounts for 2%; Said stress tube comprises outer stress tube (6) and internal layer stress tube (7); Outer stress tube (6) and internal layer stress tube (7) connect together coaxially; The dielectric constant of outer stress tube (6) is between 12-20, and the dielectric constant of internal layer stress tube (7) is between 20-30.
2. the cable termination of band stress tube according to claim 1 is characterized in that, the two ends of said stress tube are socketed in respectively in the external shield (8) and insulating barrier (4) of cable.
3. the cable termination of band stress tube according to claim 2 is characterized in that, the outer port part of said stress tube is concordant with the otch of the oversheath of cable (9), and the exposed part of the external shield of said cable (8) is coated by stress tube.
4. according to the cable termination of claim 1,2 or 3 described band stress tubes, it is characterized in that the length of said internal layer stress tube (7) is less than the length of outer stress tube (6).
5. the cable termination of band stress tube according to claim 4 is characterized in that, the outer port part of said internal layer stress tube (7) is concordant with the otch of the oversheath (9) of cable.
6. the cable termination of band stress tube according to claim 5 is characterized in that, the length of said internal layer stress tube (7) is slightly larger than half of outer stress tube (6) length.
7. the cable termination of band stress tube according to claim 6; It is characterized in that; Be provided with the cavity volume of annular in the said outer stress tube (6), internal layer stress tube (7) is arranged in this cavity volume, and the radial depth of cavity volume is consistent with the wall thickness of internal layer stress tube (7).
8. according to the cable termination of claim 1,2 or 3 described band stress tubes; It is characterized in that; The outer peripheral face of said silicone rubber for cable pot head (5) is provided with the annular convex (10) that is connected as a single entity with it, and annular convex (10) is positioned at the position that internal layer stress tube (7) and outer stress tube (6) coincide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242087XA CN102347598A (en) | 2011-08-23 | 2011-08-23 | Cable terminal with stress pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242087XA CN102347598A (en) | 2011-08-23 | 2011-08-23 | Cable terminal with stress pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102347598A true CN102347598A (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110242087XA Pending CN102347598A (en) | 2011-08-23 | 2011-08-23 | Cable terminal with stress pipe |
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| Country | Link |
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| CN (1) | CN102347598A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346415A (en) * | 2013-05-29 | 2013-10-09 | 国家电网公司 | Flexible cable joint applied to alpine region |
| CN103869104A (en) * | 2014-04-02 | 2014-06-18 | 上海华普电缆有限公司 | Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194041Y (en) * | 1994-03-12 | 1995-04-05 | 武汉市洪山区水利电力技术开发服务部 | High-elastic light cable fittings |
| CN2443517Y (en) * | 2000-09-29 | 2001-08-15 | 佘晓峰 | Double-layer stress distributed cross-connected cable intermediate joint |
| CN2449399Y (en) * | 2000-09-29 | 2001-09-19 | 佘晓峰 | Double-layer stress-dispersed cross linking cable end |
| CN201121791Y (en) * | 2007-11-05 | 2008-09-24 | 深圳市宏商热缩材料有限公司 | Coating type thermal shrinkage stress control tube |
| CN201332254Y (en) * | 2009-01-06 | 2009-10-21 | 3M创新有限公司 | Cable terminal |
| CN201369541Y (en) * | 2009-03-18 | 2009-12-23 | 深圳市深博新材料股份有限公司 | Outdoor connecting terminal of shrinking type high-tension cables |
| CN101763923A (en) * | 2010-02-20 | 2010-06-30 | 罗志昭 | High-voltage end |
-
2011
- 2011-08-23 CN CN201110242087XA patent/CN102347598A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194041Y (en) * | 1994-03-12 | 1995-04-05 | 武汉市洪山区水利电力技术开发服务部 | High-elastic light cable fittings |
| CN2443517Y (en) * | 2000-09-29 | 2001-08-15 | 佘晓峰 | Double-layer stress distributed cross-connected cable intermediate joint |
| CN2449399Y (en) * | 2000-09-29 | 2001-09-19 | 佘晓峰 | Double-layer stress-dispersed cross linking cable end |
| CN201121791Y (en) * | 2007-11-05 | 2008-09-24 | 深圳市宏商热缩材料有限公司 | Coating type thermal shrinkage stress control tube |
| CN201332254Y (en) * | 2009-01-06 | 2009-10-21 | 3M创新有限公司 | Cable terminal |
| CN201369541Y (en) * | 2009-03-18 | 2009-12-23 | 深圳市深博新材料股份有限公司 | Outdoor connecting terminal of shrinking type high-tension cables |
| CN101763923A (en) * | 2010-02-20 | 2010-06-30 | 罗志昭 | High-voltage end |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346415A (en) * | 2013-05-29 | 2013-10-09 | 国家电网公司 | Flexible cable joint applied to alpine region |
| CN103346415B (en) * | 2013-05-29 | 2016-08-10 | 国家电网公司 | Extremely frigid zones flexible cable joint |
| CN103869104A (en) * | 2014-04-02 | 2014-06-18 | 上海华普电缆有限公司 | Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower |
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| PB01 | Publication | ||
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Application publication date: 20120208 |