Disclosure of Invention
The embodiment of the invention provides a fiber reinforced copper-based composite contact wire, which is used for providing a fiber reinforced copper-based composite contact wire with the structure and performance meeting the iron standard requirements.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A fiber reinforced copper matrix composite contact wire comprising: the reinforced composite material comprises a reinforced core and a copper alloy matrix, wherein the copper alloy matrix is uniformly coated on the surface of the reinforced core through composite extrusion, and the reinforced core consists of copper alloy wires and carbon fiber bundles.
Preferably, the reinforcing core is formed by interlacing carbon fiber bundles with copper alloy wires.
Preferably, the reinforcing core is composed of carbon fiber bundles composited with a copper alloy.
Preferably, a hanging groove is further formed in the outer surface of the contact wire of the fiber reinforced copper-based composite material, and the hanging groove is two grooves which are located at the upper part of the cross section of the contact wire and are bilaterally symmetrical and used for hanging.
Preferably, an alloy type recognition groove is further formed in the outer surface of the contact wire of the fiber reinforced copper-based composite material, and the alloy type recognition groove is a shallow groove located on the upper surface of the section of the contact wire.
Preferably, the copper alloy matrix and the reinforcing core include the same kind of alloying elements, and the mass percentage of alloying elements added in the copper alloy matrix and the reinforcing core is not higher than a set threshold value.
Preferably, the alloy element added in the copper alloy matrix is copper silver or copper tin or copper magnesium alloy.
Preferably, the axial direction of the reinforcing core comprises a plurality of repeated characteristic circulation sections, and the radial cross section of each characteristic circulation section comprises a substructure formed by arranging carbon fiber bundles and copper alloy wires.
Preferably, within each of said substructures, one or more carbon fibre bundles and one or more copper alloy wires are arranged in a staggered weave.
Preferably, a plurality of the substructures are included in a radial cross section of each characteristic circulation section, the plurality of substructures are arranged symmetrically around a center of the reinforcing core, and the carbon fiber bundles and the copper alloy wires in each substructures rotate around the center of the substructures.
According to the technical scheme provided by the embodiment of the invention, the fiber reinforced copper-based composite material contact line provided by the embodiment of the invention takes the high-conductivity copper alloy as a matrix, takes the braided core of the copper wires and the carbon fiber bundles or the composite core of the copper and the carbon fiber bundles as a reinforced core, and uniformly coats the surface of the reinforced core through an extrusion process, so that the fiber reinforced copper-based composite material contact line with the structure and the performance meeting the iron standard requirement is obtained. The composite material contact wire can increase the maximum suspension tension of the line, reduce the weight of the contact wire, improve the highest running speed of the train and improve the integral safety coefficient of the contact wire while ensuring excellent conductivity.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the purpose of facilitating an understanding of the embodiments of the invention, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the invention.
Copper contact wires with the cross section of 150mm 2 are commonly adopted in high-speed railway main lines in China, and each wire consumes about 1.3 ten thousand tons of electrolytic copper per ten thousand kilometers. If a contact line with the section of 120mm 2 is adopted, the paving length of electrolytic copper per ton can reach 125% of the original paving length, but the problems of high strength and conductivity of the contact line are required to be solved.
The embodiment of the invention provides a fiber reinforced copper-based composite contact wire, and the specific structure of the contact wire is shown in figure 1. The high-conductivity copper alloy matrix 2 is uniformly coated on the reinforcing core 1 woven by copper wires and carbon fiber bundles through a continuous composite extrusion process.
In practical applications, the reinforcing core may be formed by interlacing carbon fiber bundles with copper alloy wires, as shown in fig. 2.
In practical applications, the reinforcing core may also be formed by compounding carbon fiber bundles with copper alloy.
And a hanging groove and an alloy type recognition groove are also arranged on the outer surface of the contact wire of the fiber reinforced copper-based composite material. The hanging groove is two grooves which are positioned at the upper part of the section of the contact line and are bilaterally symmetrical for hanging. The alloy type recognition groove is a shallow groove positioned on the upper surface of the section of the contact line, wherein 1 copper-tin alloy recognition groove is positioned right above; 1 copper-chromium-zirconium alloy identification groove is positioned on one side and forms an included angle of 22.5 degrees with the central line; 2 recognition grooves of copper-silver alloy are bilaterally symmetrical, and the center angle is 45.0 degrees; the number of the copper-magnesium alloy identification grooves is 3, the number of the copper-magnesium alloy identification grooves is 2, the two identification grooves are bilaterally symmetrical, the central angle is 45.0 degrees, and the remaining 1 identification grooves are positioned right above the identification grooves.
The copper alloy matrix and the reinforcing core include the same kind of alloying elements, and the mass percentage of alloying elements added in the copper alloy matrix and the reinforcing core is not higher than a set threshold value, which may be 0.4%. The alloy elements added in the copper alloy matrix are copper silver or copper tin or copper magnesium alloy, and the copper alloy wires contained in the copper alloy matrix and the reinforcing core are low-tin copper alloy.
The copper alloy matrix is uniformly coated on the surface of the reinforced core through an extrusion process, so that the fiber reinforced copper-based composite material contact wire with the cross section structure meeting the requirements of TB/T2809 copper for electrified railway and copper alloy contact wire is obtained.
The forming process of the contact line of the fiber reinforced copper-based composite material mainly comprises the following steps: firstly, placing the reinforced core in N 2 gas protective atmosphere, and carrying out copper hanging and rounding treatment on the reinforced core. And then, respectively placing the reinforced core and the low-tin copper alloy rod serving as a copper alloy matrix into an extruder for continuous extrusion cladding to obtain the composite material blank rod. And finally, placing the composite material blank rod on a drawing machine, and carrying out multi-mode cold drawing forming to prepare the composite material contact line.
In fig. 3, the reinforcing core structure of the contact line of the fiber reinforced copper-based composite material is obtained by interweaving carbon fiber bundles and copper alloy wires, so that the reinforcing core has repeatability along the axial direction, the shortest repeated section is called a characteristic circulating section, and the radial section of the characteristic circulating section is called a characteristic section. On a characteristic section of the reinforcing core, the reinforcing core can be divided into a plurality of substructures in which carbon fiber bundles and copper alloy wires are closely staggered, and each substructure comprises a revolution direction around the center of the reinforcing core and a rotation direction around the center of the substructures. I.e. comprising a plurality of said substructures in a radial cross-section of each characteristic circulation segment, a plurality of said substructures being arranged symmetrically around the centre of said reinforcing core, the carbon fibre bundles and copper alloy wires in each substructures being self-rotating around the centre of said substructures.
Example 1:
Taking a 12K fiber bundle of T700SC type carbon fiber and tin-copper (tin content is 0.15% by mass fraction) alloy wire, placing the alloy wire into a braiding machine for staggered braiding treatment, and carrying out copper coating and rounding treatment on the obtained reinforced core in an Ar gas protective atmosphere as shown in figure 2.
In the characteristic circulation section, the three-dimensional structure is regarded as 1 triangular substructure 5 consisting of 2 bundles of carbon fiber bundles 3 and 1 copper alloy wire 4, 6 triangular substructure 5 tightly surrounds the periphery of the 1 copper alloy wire, then all the triangular substructure 5 are led out in a spiral mode, and simultaneously the spinning directions of the adjacent triangular substructure 5 are opposite. In one characteristic cycle section of the reinforcing core of this embodiment, the triangular substructure 5 is considered to be drawn helically in the axial direction, during which the triangular substructure spins 360 ° and revolves tightly around 1 copper alloy wire by 180 °. The carbon fiber bundles 3 and the copper alloy wires 4 have the same cross-sectional diameter in this embodiment. The area ratio of carbon fiber bundles 3to copper alloy wires 4 in the characteristic cross section of the reinforcing core is close to 3:2.
Example 2:
And (3) taking fiber bundles of SYT49 type carbon fibers and silver-copper alloy wires (the silver content is 0.10% by mass fraction), placing the fiber bundles and the silver-copper alloy wires into a braiding machine for staggered braiding treatment, and coating copper on the obtained reinforced core in an N 2 gas protective atmosphere and rounding the reinforced core as shown in figure 3.
In the general circulation section of the reinforcing core, the 1 pair of substructures 6,8 pair of substructures 6 which are formed by 1 bundle of carbon fiber bundles 3 and 1 copper alloy wire 4 are tightly wound and then led out in a spiral way, and meanwhile, the adjacent pair of substructures 6 have the same self-spiral direction. The carbon fiber bundles 3 and the copper alloy wires 4 have the same cross-sectional diameter in this embodiment. The area ratio of carbon fiber bundles 3 to copper alloy wires 4 in the characteristic cross section of the reinforcing core is close to 1:1.
In summary, the fiber reinforced copper-based composite contact wire provided by the embodiment of the invention uses the high-conductivity copper alloy as the matrix, uses the braided core of the copper wires and the carbon fiber bundles or the composite core of the copper and the carbon fiber bundles as the reinforcing core, and uniformly coats the surface of the reinforcing core through the extrusion process to obtain the fiber reinforced copper-based composite contact wire with the structure and the performance meeting the iron standard requirements. The composite material contact wire can increase the maximum suspension tension of the line, reduce the weight of the contact wire, improve the highest running speed of the train and improve the integral safety coefficient of the contact wire while ensuring excellent conductivity.
The contact line of the fiber reinforced copper-based composite material provided by the embodiment of the invention mainly utilizes carbon fibers to bear tension applied on the contact line, and utilizes the high-conductivity matrix to conduct current, so that the service safety coefficient of the contact line is improved, and meanwhile, the electric energy is saved.
The mass of the carbon fiber in the contact line of the fiber reinforced copper-based composite material provided by the embodiment of the invention is about one fourth of that of copper with the same volume, so that the weight of the contact line can be reduced; no potential difference exists between the carbon fiber, copper and added alloy elements, so that the corrosion resistance of the whole contact line can be improved;
The contact line of the fiber reinforced copper-based composite material provided by the embodiment of the invention adopts a continuous composite extrusion process, and no aging process exists in the treatment process.
Those of ordinary skill in the art will appreciate that: the drawing is a schematic diagram of one embodiment and the modules or flows in the drawing are not necessarily required to practice the invention.
From the above description of embodiments, it will be apparent to those skilled in the art that the present invention may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, with reference to the description of method embodiments in part. The apparatus and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.