CN215069294U

CN215069294U - Copper-plated steel strand with plating layer not easy to fall off

Info

Publication number: CN215069294U
Application number: CN202120314877.3U
Authority: CN
Inventors: 姚海涛
Original assignee: Changzhou Shangyou Electric Power Technology Co ltd
Current assignee: Changzhou Shangyou Electric Power Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-12-07
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to a copper-plated steel strand wires that cladding material is difficult for droing, copper-plated steel strand wires are formed for the circular shape monofilament hank system by a plurality of strand cross sections, the monofilament includes the sandwich layer, the sandwich layer cross section is circular, sandwich layer surface from interior to exterior cladding electrolytic copper layer, anticorrosive coating and gradient cladding material in proper order, copper-plated steel strand wires surface cladding has the plastic protection layer, the utility model discloses a set up various coating structure of different performance, solved current stranded conductor surface cladding material and easily drop, the problem that life is short has increased corrosion resistance, has reached the effect of service life limit for length.

Description

Copper-plated steel strand with plating layer not easy to fall off

Technical Field

The utility model relates to a steel strand wires technical field specifically is a copper-plated steel strand wires that cladding material is difficult for droing.

Background

The electroplating defects are quite common in the technical field of steel strands, directly affect the product quality and sometimes even cause long-term production halt, wherein the falling of a plating layer is one of the most common problems, and the falling of the plating layer can be caused by a plurality of reasons, particularly on a grounding strand, because the grounding strand is directly contacted with the ground, the use working condition is complex, and the falling of a surface plating layer is more easily caused; the reason why the plating layer is most likely to fall off in the use process of the grounding stranded wire is mainly as follows: after electroplating, the plating layer and the base material fall off under the action of large external force (collision and the like); the stress of the plating layer is large, and the like.

The existing copper-plated steel strand is complex in applicable environment working condition, the external plating layer of the copper-plated steel strand is prone to falling off, the existing product is prone to falling off due to external vibration after electroplating or due to large stress of the plating layer, the service life of the strand is short, and the strand is prone to replacement, so that the prior art needs to be developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a copper-plated steel strand wires that cladding material is difficult for droing to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a copper-plated steel strand with a plating layer not easy to fall off is formed by stranding a plurality of strands of monofilaments with circular cross sections, each monofilament comprises a core layer, the cross section of each core layer is circular, and the surface of each core layer is sequentially coated with an electrolytic copper layer, an anticorrosive layer and a gradient plating layer from inside to outside;

the gradient coating adopts a nickel-phosphorus alloy coating (the name of the electroplating process refers to patent document CN 200410090218.7: a preparation method of the wear-resistant nickel-phosphorus functional gradient coating), the phosphorus content gradient and the thermal expansion coefficient gradient distribution of the prepared alloy gradient coating can effectively relieve the problem of thermal stress caused by mismatching of the coating and the substrate due to the thermal expansion coefficient, the bonding strength between the coating and the substrate is enhanced, the fatigue crack of the coating caused by tiny vibration when a stranded wire is in direct contact with the ground in the use process is avoided, and meanwhile, the nickel-phosphorus alloy also has the wear-resistant characteristic, so that the wear resistance of the product can be greatly enhanced, and the service life of the product is prolonged;

the surface of the copper-plated steel strand is coated with a plastic protective layer, and the protective layer can isolate the external environment and primarily protect the product.

Optionally, the diameter of each monofilament is 3.5mm-5.9mm, the thickness of each coating can be flexibly adjusted according to requirements, so that the diameter of the finished monofilament is different, the monofilaments with different diameters have different conductivities, wear resistances, corrosion resistances and service lives, and different sizes can be selected according to actual conditions.

Optionally, the core layer is made of a steel material with a carbon content of 3%, the higher the carbon content is, the higher the hardness of the steel material is, the steel material with a carbon content of 3% meets the requirement in plasticity, and meanwhile, the maximum hardness of the steel material is guaranteed, so that the core layer can meet the use requirements of products under complex working conditions.

Optionally, the number of the monofilaments is set to be 3, 7, 19 or 37.

Optionally, the electrolytic copper layer is evenly coated on the outer surface of the core layer, the thickness of the electrolytic copper layer is 0.3mm-0.5mm, the conductivity of copper is far stronger than that of steel materials, the plasticity is also far stronger than that of steel materials, the thicker the thickness of the electrolytic copper layer is, the stronger the conductivity of the product is, and the stronger the plasticity is.

Optionally, the anticorrosive layer is a nickel-silver alloy coating, the nickel-silver alloy is a silver alloy prepared by adding nickel into silver, crystal grains can be refined by adding a small amount of nickel, the hardness, wear resistance and burning loss resistance of the silver are improved, the silver-nickel alloy electric contact material has good electrical conductivity and thermal conductivity, the metal transfer resistance, arc burning loss resistance, electrical erosion resistance and other capabilities are strong, the wear resistance is good, the strength is high, the ductility and the cutting processing capability are good, and a small amount of rare earth elements can be added into the silver-nickel alloy to improve the performance of the silver-nickel alloy;

the anticorrosive coating is uniformly coated on the outer surface of the electrolytic copper layer, the thickness of the anticorrosive coating is 0.15mm-0.2mm, the anticorrosive coating can well protect the internal electrolytic copper layer, the service life of a product is prolonged, and the product can adapt to various different complex working conditions.

Optionally, the gradient coating is uniformly coated on the surface of the anticorrosion layer, the thickness of the gradient coating is 0.03mm-0.05mm, and the gradient coating is added on the surface of the anticorrosion layer, so that the problem that the coating falls off due to thermal stress can be effectively solved.

Optionally, the plastic protective layer is made of polyvinyl chloride, and the plastic protective layer has strong mechanical properties, good dielectric properties and high stability to light and heat, and can play a good role in protection and isolation in a complex environment.

The utility model discloses a change the rete structure of monofilament, combine to adopt the steel material of special customization carbon content 3%, adopt different alloy coating structures, can satisfy the normal work of ground connection stranded conductor under complicated operating mode, solved present prior art's ground connection stranded conductor and met external vibration or lead to the cladding material to drop easily because cladding material stress is big when electroplating the back use, stranded conductor life is very short, often need the problem of changing.

Compared with the prior art, the utility model provides a copper-plated steel strand wires that cladding material is difficult for droing possesses following beneficial effect:

the utility model discloses a change the size of monofilament, design the sandwich layer of isostructure, improved the holistic plasticity of product to the combination adopts the steel material of special customization carbon content 3%, and different alloy coating, can satisfy the normal work of ground stranded conductor under complicated operating mode, solved current copper-plated steel strand wires often because meet external vibration after the electroplating or lead to the cladding material to drop easily because cladding material stress is big, stranded conductor life is very short, the problem that often needs to be changed.

Drawings

Fig. 1 is a schematic cross-sectional view of a single wire of a copper-plated steel strand provided by the utility model, the plating layer of which is not easy to fall off;

fig. 2 is a schematic cross-sectional view of a copper-plated steel strand with a plating layer not easy to fall off, provided by the utility model;

fig. 3 is the utility model provides a three-dimensional structure schematic diagram of a copper-plated steel strand that cladding material is difficult for droing.

In the figure: 1. a monofilament; 2. a core layer; 3. electrolytic copper layer; 4. an anticorrosive layer; 5. gradient plating; 6. and a plastic protective layer.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example (b): as shown in fig. 1-3, the utility model provides a copper-plated steel strand that cladding material is difficult for droing, copper-plated steel strand is twisted by a plurality of strands of monofilament 1 that the cross section is circular, monofilament 1 quantity sets up to 7, monofilament 1 diameter is 4.8mm, monofilament 1 includes

sandwich layer

2, 2 cross sections of sandwich layer are circular, sandwich layer 2 is made by the steel material that contains 3% carbon, 2 surface of sandwich layer is cladding electrolytic copper layer 3, anticorrosive coating 4 and gradient cladding 5 from inside to outside in proper order, electrolytic copper layer 3 is even cladding on 2 surface of sandwich layer, electrolytic copper layer 3 thickness is 0.42 mm;

the anticorrosive coating 4 is a nickel-silver alloy coating, the anticorrosive coating 4 is uniformly coated on the outer surface of the electrolytic copper layer 3, and the thickness of the anticorrosive coating 4 is 0.17 mm;

the gradient plating layer 5 is uniformly coated on the surface of the anticorrosive layer 4, the gradient plating layer 5 adopts a nickel-phosphorus alloy coating, and the thickness of the gradient plating layer 5 is 0.03 mm;

the surface of the copper-plated steel strand is coated with a plastic protection layer 6, and the plastic protection layer is made of polyvinyl chloride.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a copper facing steel strand wires that cladding material is difficult for droing which characterized in that: the copper-plated steel stranded wire is formed by stranding a plurality of strands of monofilaments with circular cross sections, each monofilament comprises a core layer, the cross section of each core layer is circular, and the surface of each core layer is sequentially coated with an electrolytic copper layer, an anticorrosive layer and a gradient plating layer from inside to outside;

the gradient plating layer adopts a nickel-phosphorus alloy coating;

the surface of the copper-plated steel strand is coated with a plastic protective layer.

2. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the diameter of the monofilament is 3.5mm-5.9 mm.

3. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the number of the monofilaments is set to be 3, 7, 19 or 37.

4. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the electrolytic copper layer is uniformly coated on the outer surface of the core layer, and the thickness of the electrolytic copper layer is 0.3mm-0.5 mm.

5. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the anticorrosive coating is a nickel-silver alloy coating, the anticorrosive coating is uniformly coated on the outer surface of the electrolytic copper layer, and the thickness of the anticorrosive coating is 0.15-0.2 mm.

6. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the gradient coating is uniformly coated on the surface of the anticorrosive layer, and the thickness of the gradient coating is 0.03mm-0.05 mm.

7. The copper-plated steel strand with the plating layer not easy to fall off as claimed in claim 1, characterized in that: the plastic protective layer is made of polyvinyl chloride.