CN106486959A - A kind of direct current cables joint - Google Patents
A kind of direct current cables joint Download PDFInfo
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- CN106486959A CN106486959A CN201510546151.1A CN201510546151A CN106486959A CN 106486959 A CN106486959 A CN 106486959A CN 201510546151 A CN201510546151 A CN 201510546151A CN 106486959 A CN106486959 A CN 106486959A
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Abstract
The invention provides a kind of direct current cables joint, joint includes from inside to outside cylindrical shape high voltage shield 7, circle tube joint insulating barrier 9 and the ground shield layer 10 of sequentially coaxially setting, coaxial symmetrical horn shape stress cone 8 is embedded on splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends, symmetrical to referred to as two horn mouths, the wide mouth end that tubaeform stress cone 8 includes cylindrical shape slot end and axial section is a pair symmetrical circular arc, the inwall of splice insulation layer 9 is provided with the groove being embedded stress cone 8 slot end and the projection being embedded high voltage shield 7.The joint design design of this direct current cables joint optimization, reduce stress cone root, high voltage shield end and splice insulation in the layer electric field intensity, the internal field intensity of joint is evenly distributed, it is to avoid the splice insulation space charge that high field intensity causes excessively is assembled and electric field breakdown.
Description
Technical field
The present invention relates to a kind of cable connector, in particular to a kind of direct current cables joint.
Background technology
Flexible DC power transmission, based on voltage source converter, turn-off device and pulsewidth modulation, has controllability height, design is applied
Work facilitates environmental protection, takes up an area the advantages of need not communicate between little and current conversion station, regenerative resource grid-connected, distributed power generation is grid-connected, hand over
The aspects such as streaming system interconnection, island with power, the capacity-increasing transformation of urban power distribution network have obvious advantage.
High voltage direct current cable is the important component part of flexible direct current power transmission system, and the transition joint of cable is to connect two cables
Indispensable device, is also the weak link of cable system.
The breakdown point of high voltage direct current cable cable connector is generally present in the root of high voltage shield end and stress cone；In High-Field
Pretend under using, the splice insulation inner layer space quantity of electric charge increases, splice insulation layer and wire insulation interface charge buildup will be caused,
Lead to interface electric field distortion, internal field may be caused to puncture.
Existing cable connector splice insulation layer adopts usual silicone rubber insulant, and its electrical conductivity is less than cable insulation, straight
Under stream electric field action, the field strength distribution in insulant is inversely proportional to the electrical conductivity of material, and existing cable joint splice insulation layer holds
The field intensity being subject to is higher than cable insulation, and the disruptive field intensity of usual silicone rubber insulant is less than the crosslinked polyetylene insulated of cable
Material, easily punctures under high DC electric field.
Existing cable connector stress cone adopts usual silicone rubber material, and the electrical conductivity of usual silicone rubber material is not with applying direct current
It is impossible to uniform electric field distribution, on stress cone under the effect of high DC electric field, easily generation electric stress is concentrated, and leads to for field field intensity change
Stress cone punctures.
Content of the invention
For the drawbacks described above overcoming prior art to exist, the invention provides a kind of direct current cables joint, optimize joint design and set
Meter, reduces stress cone root, high voltage shield end and splice insulation in the layer electric field intensity, and the internal field strength distribution of joint is equal
Even, it is to avoid the splice insulation space charge that high field intensity causes excessively is assembled and electric field breakdown.
For achieving the above object, the technical scheme that the present invention takes is：
A kind of direct current cables joint, joint includes from inside to outside the cylindrical shape high voltage shield 7 of sequentially coaxially setting, cylindrical shape connects
Head insulating barrier 9 and ground shield layer 10, it is coaxial right that splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Claim tubaeform stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axial section is
The wide mouth end of a pair symmetrical circular arc, the inwall of splice insulation layer 9 is provided with the groove being embedded stress cone 8 slot end and is embedded high pressure
The projection of screen layer 7.
Preferably, circle tube joint insulating barrier 9 external diameter is 180～230mm, and splice insulation layer 9 two ends are symmetrically arranged circle
Platform, splice insulation layer 9 two ends internal diameter is equal with the cylindrical shape slot end internal diameter of stress cone 8, middle part internal diameter and high voltage shield 7
Internal diameter is equal.
Preferably, cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and circular arc corresponds to
Central angle is 90 °, and the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 2～7mm,
High voltage shield 7 length is 200～400mm.
Preferably, the corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end be 60 °, the corresponding radius of circular arc be 10～
20mm, the thickness of stress cone 8 is 5～15mm, and the length at the cylindrical shape slot end of stress cone 8 is 50～80mm.
Preferably, high voltage shield 7 one end and the distance of homonymy stress cone 8 width mouth junction point are 100～300mm.
Preferably, stress cone adopts silicon rubber composite material, and the preparing raw material of silicone rubber based composites includes following percent mass
Than meter component：Silicone rubber 60～80%, conductive filler 20%～40%.
Preferably, conductive filler be from white carbon black, CNT, graphite nickel plating, nickel copper-clad, copper is silver-plated, aluminum is silver-plated, glass plating
One or more selecting in silver, argentum powder, aluminium powder, polyaniline, Barium metatitanate. and titanium oxide.
Preferably, stress cone 8 and high voltage shield 7 adopt polymer matrix composite, polymer matrix composite preparing raw material
Including following volume fraction component：Polymer 55%～86%, filler 14%～45%.
Preferably, polymer is one or more selecting from polyester resin, polyethylene, epoxy resin or acrylic resin,
Filler is one or more selecting from zinc oxide, nanometer silicon carbide or Barium metatitanate..
Preferably, the electrical conductivity of splice insulation layer 2 is more than the electrical conductivity of insulating layer of conductor.
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
Wire stylet 1 radius of cable is r mm, its outer sequentially coaxially the cylindrical shape conductor shield 2 of setting, cable from the inside to the outside
The wall thickness of insulating barrier 3 and cable shield 4 is respectively t1mm、t2Mm and t3mm；
The internal diameter of the high voltage shield 7 of prepared direct current cables joint is (2r+t1+t2)；
Stress cone 8 cylindrical shape slot end internal diameter is 2r+t1+t2+t3)mm；
High voltage shield 7 length is M mm, and high voltage shield 7 one end is i.e. interior with the distance of homonymy stress cone 8 width mouth junction point
The length of creep distance passage is Lmm；
2) remove the cable shield 4 of wire connecting ends (L+M/2) mm, remove cable insulation 3 and conductor shield 2 makes to lead
Line insulating layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, circular arc
Corresponding radius R1For 20～32mm, the wire insulation 3 outer surface axial length of removal is M/2mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length and high voltage shield 7 wall thickness t4Identical；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, the use of thickness is (t1+t2), length is M-2t4The connection gold utensil of mm connects
The wire stylet of two wires；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；
Ring type filling 6 adopts nonlinear conductance composite, is polymer matrix composite, polymer matrix composite preparing raw material
Including following volume fraction component：Polymer 55%～86%, filler 14%～45%.Polymer is from polyester resin, poly- second
One or more selecting in alkene, epoxy resin or acrylic resin, filler is from zinc oxide, nanometer silicon carbide or Barium metatitanate.
One or more selecting.
The conductance of composite or dielectric property have dependency, the performance parameter of material and space electric field electricity to the numerical value of space electric field
Conductance can carry out Adaptive matching with the size of space electric field, has the function of self adaptation uniform electric field distribution under inhomogeneous field.
Under existing fringing field effect, Nonlinear Composite keeps electrical conductivity or the dielectric constant of very little, is equivalent to insulant, material
Leakage Current and dielectric loss are relatively small.Under high electric field effect, Nonlinear Composite assumes very big electrical conductivity or dielectric
Constant, can play effective modulating action to space electric field distribution, and Electric Field Distribution is more uneven, composite is to high electric field
Inhibition more notable.
I.e. under existing fringing field effect, there is relatively low electrical conductivity, under high electric field effect, assume higher electrical conductivity, have
The function of self adaptation homogenizing Electric Field Distribution under inhomogeneous field, using the uniformity that can improve space electric field distribution, control joint is exhausted
Edge and the electric field intensity of cable body insulator interface, prevent the splice insulation space charge that high field intensity causes from excessively assembling and possible edge
The breakdown fault that interior creep distance passage occurs.
Under DC voltage effect, dielectric electric-field intensity distribution and electrical conductivity are inversely proportional to；For double hyer insulation medium, conductance
The electric field intensity that high insulant of rate bears is relatively low.
With immediate prior art ratio, beneficial effects of the present invention include：
1. the direct current cables joint in the present invention, using prefabricated structure, in-site installation is convenient, stable.
2. the direct current cables joint in the present invention, stress cone adopts the composite of high conductivity, reduces stress poppet surface and root
The electric field intensity in portion.
3. the direct current cables joint in the present invention, high voltage shield end is circular arc, and connection gold utensil is arranged with wire insulation interlayer
Ring type filling 6, reduces the electric field intensity of high-tension shielding tube end, and the internal field intensity of joint is evenly distributed, it is to avoid long-term fortune
When row and in short-term overvoltage, splice insulation layer and wire insulation interface occur surface breakdown or flashover to lead to insulate
Lost efficacy.
4. the direct current cables joint in the present invention, optimizes joint design design, reduces stress cone root, high voltage shield end
Portion and splice insulation in the layer electric field intensity, the internal field intensity of joint is evenly distributed, it is to avoid the splice insulation that high field intensity causes
Space charge is excessively assembled and electric field breakdown.
5. the direct current cables joint in the present invention, the silicone rubber electrical conductivity that splice insulation layer 2 adopts is high, the wire with low conductivity
Insulating barrier cooperation effectively reduces the electric field intensity that splice insulation layer bears.
6. the direct current cables joint in the present invention, economizes in raw materials, cost is relatively low, energy-conservation, environmental protection.
7. the direct current cables joint in the present invention, structure is simple, makes simple, and low cost of manufacture is it is easy to installing and safeguarding.
8. the direct current cables joint in the present invention, ring type filling 6 top arc is smoothly transitted into high voltage shield 7 end circular arc
Serpentine, is connected using two sections of arc transition, reduces the electric field intensity of screen layer end.
9. the direct current cables joint in the present invention, through finite element analyses, high voltage shield end surface electric field intensity is less than 7.0
KV/mm, the electric field intensity tangential component of stress cone root is less than 8.0kV/mm, the maximum electricity that splice insulation layer bears
Field intensity is less than 10.0kV/mm.
Brief description
Fig. 1 direct current cables joint use state structural representation；
Fig. 2 high-tension shielding pipe end configuration schematic diagram；
Fig. 3 stress cone structural representation；
Fig. 4 direct current cables joint design schematic diagram；
Wherein 1 wire stylet, 2- conductor shield, 3- cable insulation, 4- cable shield,
5- connection gold utensil, 6 ring type fillings, 7- high-tension shielding pipe, 8 stress cones, 9 splice insulation layers,
10 ground shield layers.
Specific embodiment
With reference to example, the present invention will be described in detail.
Embodiment 1：
As shown in figure 1, so that 320kV crosslinked polyethylene insulated high-voltage power cable is with direct current cables joint as a example.
A kind of direct current cables joint, joint includes from inside to outside the cylindrical shape high voltage shield 7 of sequentially coaxially setting, cylindrical shape connects
Head insulating barrier 9 and ground shield layer 10, it is coaxial right that splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Claim tubaeform stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axial section is
The wide mouth end of a pair symmetrical circular arc, the inwall of splice insulation layer 9 is provided with the groove being embedded stress cone 8 slot end and is embedded high pressure
The projection of screen layer 7.
Circle tube joint insulating barrier 9 external diameter is 180mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 6mm, high voltage shield 7
Length is 200mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 10mm, stress
The thickness of cone 8 is 5mm, and the length at the cylindrical shape slot end of stress cone 8 is 50mm.
High voltage shield 7 one end is 300mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone 8 and high voltage shield 7 adopt polymer matrix composite, and polymer matrix composite preparing raw material includes as follows
Volume fraction component：Polymer 55%, filler 14%.
Polymer is polyester resin, and filler is zinc oxide.
The electrical conductivity of splice insulation layer 2 is more than the electrical conductivity of insulating layer of conductor.
During room temperature：Splice insulation layer 2 electrical conductivity is 4.0 × 10-15S/m, wire insulation 3 with the electrical conductivity of cross-linking polyethylene materials is
2.0×10-16S/m；
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 400mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 28mm, the wire insulation 3 outer surface axial length of removal is 100m；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 material is identical with stress cone 8.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 6.2kV/mm,
Stress cone root max calculation electric field intensity tangential component is 7.5kV/mm, the max calculation electric field intensity that splice insulation layer bears
For 9.5kV/mm.
Embodiment 2
A kind of direct current cables joint as shown in Figure 1, joint include from inside to outside sequentially coaxially setting cylindrical shape high voltage shield 7,
Circle tube joint insulating barrier 9 and ground shield layer 10, splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Coaxial symmetrical horn shape stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axle
The wide mouth end being a pair symmetrical circular arc to section, the inwall of splice insulation layer 9 be provided be embedded stress cone 8 slot end groove and
It is embedded the projection of high voltage shield 7.
Circle tube joint insulating barrier 9 external diameter is 230mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 2mm, high voltage shield 7
Length is 400mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 20mm, stress
The thickness of cone 8 is 5mm, and the length at the cylindrical shape slot end of stress cone 8 is 80mm.
High voltage shield 7 one end is 100mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone 8 and high voltage shield 7 adopt polymer matrix composite, and polymer matrix composite preparing raw material includes as follows
Volume fraction component：Polymer 86%, filler 45%.
Polymer is from polyethylene, and filler is zinc oxide 10%, nanometer silicon carbide 35%.
The electrical conductivity of splice insulation layer 2 is more than the electrical conductivity of insulating layer of conductor.When 70 DEG C splice insulation layer 2 electrical conductivity be 5.0 ×
10-14S/m, it is 1.2 × 10 that wire insulation 3 uses the electrical conductivity of cross-linking polyethylene materials-15S/m；
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 300mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 20mm, the wire insulation 3 outer surface axial length of removal is 200mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 material is identical with stress cone 8.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 6.1kV/mm,
Stress cone root max calculation electric field intensity tangential component is 7.3kV/mm, the max calculation electric field intensity that splice insulation layer bears
For 9.3V/mm.
Embodiment 3
A kind of direct current cables joint as shown in Figure 1, joint include from inside to outside sequentially coaxially setting cylindrical shape high voltage shield 7,
Circle tube joint insulating barrier 9 and ground shield layer 10, splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Coaxial symmetrical horn shape stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axle
The wide mouth end being a pair symmetrical circular arc to section, the inwall of splice insulation layer 9 be provided be embedded stress cone 8 slot end groove and
It is embedded the projection of high voltage shield 7.
Circle tube joint insulating barrier 9 external diameter is 200mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 7mm, high voltage shield 7
Length is 300mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 15mm, stress
The thickness of cone 8 is 10mm, and the length at the cylindrical shape slot end of stress cone 8 is 65mm.
High voltage shield 7 one end is 200mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone 8 and high voltage shield 7 adopt polymer matrix composite, and polymer matrix composite preparing raw material includes as follows
Volume fraction component：Polymer 70%, filler 30%.
Polymer is epoxy resin and acrylic resin, and filler is zinc oxide 9%, Barium metatitanate. 21%.
The electrical conductivity of splice insulation layer 2 is more than the electrical conductivity of insulating layer of conductor.
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 350mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 32mm, the wire insulation 3 outer surface axial length of removal is 150mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 material is identical with stress cone 8.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 5.9kV/mm, should
Power tang portion max calculation electric field intensity tangential component is 7kV/mm, and the max calculation electric field intensity that splice insulation layer bears is 8.9
kV/mm.
Embodiment 4
A kind of direct current cables joint as shown in Figure 1, joint include from inside to outside sequentially coaxially setting cylindrical shape high voltage shield 7,
Circle tube joint insulating barrier 9 and ground shield layer 10, splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Coaxial symmetrical horn shape stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axle
The wide mouth end being a pair symmetrical circular arc to section, the inwall of splice insulation layer 9 be provided be embedded stress cone 8 slot end groove and
It is embedded the projection of high voltage shield 7.
Circle tube joint insulating barrier 9 external diameter is 220mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 4mm, high voltage shield 7
Length is 350mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 18mm, stress
The thickness of cone 8 is 13mm, and the length at the cylindrical shape slot end of stress cone 8 is 75mm.
High voltage shield 7 one end is 25mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone 8 and high voltage shield 7 adopt polymer matrix composite, and polymer matrix composite preparing raw material includes as follows
Volume fraction component：Polymer 80%, filler 20%.
Polymer is from acrylic resin, and filler is zinc oxide 12%, nanometer silicon carbide 8%.
The electrical conductivity of splice insulation layer 2 is 5.5 × 10-14S/m is more than the electrical conductivity 1.5 × 10 of insulating layer of conductor-15S/m.
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 425mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 25mm, the wire insulation 3 outer surface axial length of removal is 175mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 material is identical with stress cone 8.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 5.8kV/mm, should
Power tang portion max calculation electric field intensity tangential component is 6.9kV/mm, and the max calculation electric field intensity that splice insulation layer bears is
8.8kV/mm.
Embodiment 5
A kind of direct current cables joint as shown in Figure 1, joint include from inside to outside sequentially coaxially setting cylindrical shape high voltage shield 7,
Circle tube joint insulating barrier 9 and ground shield layer 10, splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Coaxial symmetrical horn shape stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axle
The wide mouth end being a pair symmetrical circular arc to section, the inwall of splice insulation layer 9 be provided be embedded stress cone 8 slot end groove and
It is embedded the projection of high voltage shield 7.
Circle tube joint insulating barrier 9 external diameter is 220mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 4mm, high voltage shield 7
Length is 350mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 18mm, stress
The thickness of cone 8 is 13mm, and the length at the cylindrical shape slot end of stress cone 8 is 75mm.
High voltage shield 7 one end is 25mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone adopts silicon rubber composite material, and the preparing raw material of silicone rubber based composites includes following mass percent component：
Silicone rubber 60%, conductive filler 40%.
Conductive filler is white carbon black, CNT.
High voltage shield 7 adopts polymer matrix composite, and polymer matrix composite preparing raw material includes following volume fraction
Component：Polymer 55%, filler 14%.Polymer is polyester resin, and filler is zinc oxide.
The electrical conductivity of splice insulation layer 2 is 5.5 × 10-14S/m is more than the electrical conductivity 1.5 × 10 of insulating layer of conductor-15S/m.
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 425mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 25mm, the wire insulation 3 outer surface axial length of removal is 175mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 adopts material identical with high voltage shield 7.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 5.7kV/mm, should
Power tang portion max calculation electric field intensity tangential component is 7kV/mm, and the max calculation electric field intensity that splice insulation layer bears is 8.7
kV/mm.
Embodiment 6
A kind of direct current cables joint as shown in Figure 1, joint include from inside to outside sequentially coaxially setting cylindrical shape high voltage shield 7,
Circle tube joint insulating barrier 9 and ground shield layer 10, splice insulation layer 9 inwall at cylindrical shape high voltage shield 7 two ends is embedded
Coaxial symmetrical horn shape stress cone 8, symmetrical to referred to as two horn mouths, tubaeform stress cone 8 includes cylindrical shape slot end and axle
The wide mouth end being a pair symmetrical circular arc to section, the inwall of splice insulation layer 9 be provided be embedded stress cone 8 slot end groove and
It is embedded the projection of high voltage shield 7.
Circle tube joint insulating barrier 9 external diameter is 220mm, and splice insulation layer 9 two ends are symmetrically arranged round platform, splice insulation
Layer 9 two ends internal diameter are equal with the cylindrical shape slot end internal diameter of stress cone 8, and middle part internal diameter is equal with high voltage shield 7 internal diameter.
Cylindrical shape high voltage shield 7 two ends have the outer chamfering of circular arc, and the outer chamfering of circular arc is arc convex surface, and the corresponding central angle of circular arc is
90 °, the corresponding radius of circular arc is equal with high voltage shield 7 thickness, and the thickness of high voltage shield 7 is 4mm, high voltage shield 7
Length is 350mm.
The corresponding central angle of circular arc of the axial section of stress cone 8 wide mouth end is 60 °, and the corresponding radius of circular arc is 18mm, stress
The thickness of cone 8 is 13mm, and the length at the cylindrical shape slot end of stress cone 8 is 75mm.
High voltage shield 7 one end is 25mm with the distance of homonymy stress cone 8 width mouth junction point.
Stress cone adopts silicon rubber composite material, and the preparing raw material of silicone rubber based composites includes following mass percent component：
Silicone rubber 80%, conductive filler 20%.
Conductive filler is that graphite nickel plating, nickel copper-clad and copper are silver-plated.
High voltage shield 7 adopts polymer matrix composite, and polymer matrix composite preparing raw material includes following volume fraction
Component：Polymer 55%, filler 14%.Polymer is polyester resin, and filler is zinc oxide.
The electrical conductivity of splice insulation layer 2 is 5.5 × 10-14S/m is more than the electrical conductivity 1.5 × 10 of insulating layer of conductor-15S/m.
A kind of method of use direct current cables connection bond wires, comprises the steps：
1) size according to joint connection cable sets the size of direct current cables joint mold, adds raw material to use rubber in mould
Direct current cables joint prepared by vulcanizer；
2) remove the cable shield 4 of wire connecting ends 425mm, remove cable insulation 3 and conductor shield 2 makes wire exhausted
Edge layer 3 connection end forms chamfering in circular arc, and in circular arc, chamfering is arc convex surface, and the corresponding central angle of circular arc is 36 °, and circular arc corresponds to
Radius R1For 25mm, the wire insulation 3 outer surface axial length of removal is 175mm；
3) the cylindrical shape ring type filling 6 that top is matched with chamfering in cable line insulating layer 3 circular arc is sheathed on wire stylet 1, cylinder
Shape ring type filling 6 cylindrical portion length is identical with high voltage shield 7 wall thickness；
4) by the prepared direct current cables fitting sleeve of step 1 on the wire that step 3 obtains, measurement marks not sheathed direct current cables
The wire of joint is the position of direct current cables joint length half away from wire stylet section axial distance；
5) the wire core section of two wires is fitted, connect the wire stylet of two wires using connection gold utensil；
6) moving step 4 is sheathed on direct current cables joint on wire to step 4 labeling position.
Ring type filling 6 top arc and high voltage shield 7 end circular arc smoothly transit in "S" shape, are connected using two sections of arc transition,
Reduce the electric field intensity of screen layer end；Ring type filling 6 adopts material identical with high voltage shield 7.
Show through finite element method (fem) analysis, high voltage shield 7 end surface max calculation electric field intensity modulus value is 5.9kV/mm, should
Power tang portion max calculation electric field intensity tangential component is 6.8kV/mm, and the max calculation electric field intensity that splice insulation layer bears is 9
kV/mm.
Finally it should be noted that：Above example is only not intended to limit in order to technical scheme to be described, although reference
Above-described embodiment has been described in detail to the present invention, and those of ordinary skill in the art should be understood：Still can be to this
The specific embodiment of invention is modified or equivalent, and any modification without departing from spirit and scope of the invention or wait
With replacing, it all should be covered in the middle of scope of the presently claimed invention.
Claims (10)
1. a kind of direct current cables joint it is characterised in that：Described joint includes from inside to outside the cylindrical shape high-tension shielding of sequentially coaxially setting
Layer (7), circle tube joint insulating barrier (9) and ground shield layer (10), described cylindrical shape high voltage shield (7) two ends
Described splice insulation layer (9) inwall on be embedded coaxial symmetrical horn shape stress cone (8), described to referred to as two horn mouths
Symmetrically, the wide mouth end that described tubaeform stress cone (8) includes cylindrical shape slot end and axial section is a pair symmetrical circular arc,
The inwall of described splice insulation layer (9) is provided with the groove being embedded described stress cone (8) slot end and is embedded described high-tension shielding
The projection of layer (7).
2. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：Described circle tube joint insulating barrier (9) external diameter
For 180～230mm, described splice insulation layer (9) two ends are symmetrically arranged round platform, described splice insulation layer (9)
Two ends internal diameter is equal with the cylindrical shape slot end internal diameter of stress cone (8), middle part internal diameter and described high voltage shield (7) internal diameter
Equal.
3. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：Described cylindrical shape high voltage shield (7) two ends
Have the outer chamfering of circular arc, the outer chamfering of described circular arc is arc convex surface, the corresponding central angle of described circular arc is 90 °, described circular arc pair
The radius answered is equal with described high voltage shield (7) thickness, and the thickness of described high voltage shield (7) is 2～7mm, institute
Stating high voltage shield (7) length is 200～400mm.
4. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：The axial direction of described stress cone (8) wide mouth end is cutd open
The corresponding central angle of circular arc in face is 60 °, and the corresponding radius of described circular arc is 10～20mm, the thickness of described stress cone (8)
Spend for 5～15mm, the length at the cylindrical shape slot end of described stress cone (8) is 50～80mm.
5. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：Described high voltage shield (7) one end and homonymy
The distance of stress cone (8) width mouth junction point is 100～300mm.
6. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：Described stress cone adopts silicon rubber composite material,
The preparing raw material of described silicone rubber based composites includes following mass percent component：Silicone rubber 60～80%, conduction is filled out
Material 20%～40%.
7. as claimed in claim 6 a kind of direct current cables joint it is characterised in that：Described conductive filler be from white carbon black, CNT,
Graphite nickel plating, nickel copper-clad, copper is silver-plated, aluminum is silver-plated, glass silvering, argentum powder, aluminium powder, polyaniline, Barium metatitanate. and titanium oxide
In select one or more.
8. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：Described stress cone (8) and high voltage shield (7)
Using polymer matrix composite, described polymer matrix composite preparing raw material includes following volume fraction component：Polymerization
Thing 55%～86%, filler 14%～45%.
9. as claimed in claim 8 a kind of direct current cables joint it is characterised in that：Described polymer be from polyester resin, polyethylene,
One or more selecting in epoxy resin or acrylic resin, described filler is from zinc oxide, nanometer silicon carbide or Barium metatitanate.
In select one or more.
10. as claimed in claim 1 a kind of direct current cables joint it is characterised in that：The electrical conductivity of described splice insulation layer (2) is big
Electrical conductivity in insulating layer of conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546151.1A CN106486959A (en) | 2015-08-31 | 2015-08-31 | A kind of direct current cables joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546151.1A CN106486959A (en) | 2015-08-31 | 2015-08-31 | A kind of direct current cables joint |
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|---|---|
| CN106486959A true CN106486959A (en) | 2017-03-08 |
Family
ID=58235128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510546151.1A Pending CN106486959A (en) | 2015-08-31 | 2015-08-31 | A kind of direct current cables joint |
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| CN (1) | CN106486959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557344A (en) * | 2018-12-30 | 2019-04-02 | 南瑞集团有限公司 | A kind of high pressure resistant pin configuration |
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|---|---|---|---|---|
| JPH11332081A (en) * | 1998-05-08 | 1999-11-30 | Furukawa Electric Co Ltd:The | Manufacture of insulating tube for electric cable |
| CN2899220Y (en) * | 2005-12-17 | 2007-05-09 | 深圳市沃尔核材股份有限公司 | Intermediate terminal |
| CN205178461U (en) * | 2015-08-31 | 2016-04-20 | 国网智能电网研究院 | DC cable connects |
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2015
- 2015-08-31 CN CN201510546151.1A patent/CN106486959A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11332081A (en) * | 1998-05-08 | 1999-11-30 | Furukawa Electric Co Ltd:The | Manufacture of insulating tube for electric cable |
| CN2899220Y (en) * | 2005-12-17 | 2007-05-09 | 深圳市沃尔核材股份有限公司 | Intermediate terminal |
| CN205178461U (en) * | 2015-08-31 | 2016-04-20 | 国网智能电网研究院 | DC cable connects |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557344A (en) * | 2018-12-30 | 2019-04-02 | 南瑞集团有限公司 | A kind of high pressure resistant pin configuration |
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