CN105244070A - Fiber reinforcement copper substrate composite contact line - Google Patents

Abstract

The invention provides a fiber reinforcement copper substrate composite contact line which mainly comprises a reinforcement core and a copper alloy substrate. The copper alloy substrate uniformly coats the surface of the reinforcement core through coextrusion. The substrate is made of high-conductivity copper alloy. The reinforcement core is a copper wire and carbon fiber bundle braided core or a copper and carbon fiber bundle composite core. The substrate uniformly coats the surface of the reinforcement core through an extrusion technology, so as to acquire the fiber reinforcement copper substrate composite contact line whose structure and performance meet iron standard requirements. According to the composite contact line, great conductivity is ensured; the maximum suspension tension of the line is increased; the weight of the contact line is reduced; the maximum running speed of a train is enhanced; and the overall safety factor of the contact line is improved.

Description

Fiber Reinforced Copper Matrix Composite Contact Wire

technical field

The invention relates to the technical field of contact wires, in particular to a fiber-reinforced copper matrix composite contact wire.

Background technique

The contact wire is a key component of the electrified railway pantograph-catenary system. It is required to have sufficient tensile strength to bear its suspension tension to ensure that the electrified railway locomotive can obtain good current; at the same time, it is required to have excellent electrical conductivity to ensure that the electrified line is relatively Low power consumption.

Today, domestic electrified railway construction has entered a period of rapid development. The technology for the construction and operation of high-speed railways with a speed of 250 kilometers per hour and 350 kilometers per hour has matured. The upsurge, which puts forward higher requirements for the electrified railway catenary, requiring the catenary to have extremely high tensile strength to withstand higher suspension tension, thereby increasing the wave propagation speed of the catenary and reducing the off-line sparks generated when the locomotive runs at high speed .

Copper alloys are the most widely used materials for high-speed railway contact wires. But for a long time, there has been a contradiction between high strength and high conductivity in the research and preparation of copper alloy contact wires. Adding alloying elements is a traditional solution to improve the tensile strength of copper alloy contact wires. However, adding solute atoms will cause lattice distortion, which will lead to a decrease in its electrical conductivity. At present, the existing high-strength copper alloy contact wires are based on the premise of sacrificing electrical conductivity and plasticity.

Contents of the invention

An embodiment of the present invention provides a fiber-reinforced copper-based composite contact wire to provide a fiber-reinforced copper-based composite contact wire whose structure and performance meet the requirements of the iron standard.

In order to achieve the above object, the present invention adopts the following technical solutions.

A fiber-reinforced copper-based composite contact wire, comprising: a reinforcing core and a copper alloy matrix, the copper alloy matrix is uniformly coated on the surface of the reinforcing core by co-extrusion, the reinforcing core is made of copper alloy wire and Composed of carbon fiber bundles.

Preferably, the reinforcing core is formed by interlacing braiding of carbon fiber bundles and copper alloy wires.

Preferably, the reinforcing core is composed of carbon fiber bundles and copper alloy.

Preferably, the outer surface of the fiber-reinforced copper matrix composite contact wire is further provided with suspension grooves, and the suspension grooves are two left-right symmetrical grooves located on the upper part of the cross-section of the contact wire for suspension.

Preferably, the outer surface of the fiber-reinforced copper matrix composite contact wire is further provided with an alloy type identification groove, and the alloy type identification groove is a shallow groove located on the upper surface of the contact wire section.

Preferably, the types of alloying elements included in the copper alloy matrix and the reinforcing core are the same, and the mass percentages of the alloying elements added in the copper alloy matrix and the reinforcing core are not higher than a set threshold.

Preferably, the alloying element added to the copper alloy matrix is copper-silver or copper-tin or copper-magnesium alloy.

Preferably, the axial direction of the reinforcing core includes a plurality of repeated characteristic cycle segments, and the radial cross-section of each characteristic cycle segment includes a substructure composed of carbon fiber bundles and copper alloy wires.

Preferably, in each of the substructures, one or more carbon fiber bundles and one or more copper alloy wires are interlaced and arranged.

Preferably, a plurality of substructures are included in the radial section of each characteristic cycle section, and the plurality of substructures are symmetrically arranged around the center of the reinforcing core, and the carbon fiber bundles and copper alloy wires in each substructure Rotate around the center of the substructure.

It can be seen from the technical solutions provided by the above-mentioned embodiments of the present invention that the fiber-reinforced copper matrix composite contact wire provided by the embodiments of the present invention uses a high-conductivity copper alloy as a matrix, and a braided core of copper wire and carbon fiber bundles or copper The composite core with carbon fiber bundles is the reinforced core, and the matrix is evenly coated on the surface of the reinforced core by extrusion process, so that the structure and performance meet the requirements of the iron standard for the fiber reinforced copper matrix composite contact wire. While ensuring excellent electrical conductivity, the composite contact wire can increase the maximum suspension tension of the line, reduce the weight of the contact wire, increase the maximum running speed of the train and improve the overall safety factor of the contact wire.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Figure 1 is a specific structural diagram of a fiber-reinforced copper-based composite contact wire provided by an embodiment of the present invention. In the figure, a reinforcing core 1, a copper alloy matrix 2, a suspension groove 3 and an alloy type identification groove 4;

Fig. 2 is a schematic diagram of a reinforcing core provided by an embodiment of the present invention formed by interlacing carbon fiber bundles and copper alloy wires;

Fig. 3 is a schematic diagram of another reinforcing core provided by an embodiment of the present invention formed by interlacing carbon fiber bundles and copper alloy wires;

Fig. 4 is a schematic diagram of another reinforcing core provided by an embodiment of the present invention formed by interlacing carbon fiber bundles and copper alloy wires.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude 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. Additionally, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Those skilled in the art can understand 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 should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

In order to facilitate the understanding of the embodiments of the present invention, several specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

The main line of China's high-speed railways generally uses copper contact wires with a cross ^- section of 150mm2, and each line consumes about 13,000 tons of electrolytic copper per 10,000 kilometers. If a contact wire with a cross ^- section of 120mm2 is used, the laying length of electrolytic copper per ton can reach 125% of the original laying length, but the problem of high strength and conductivity of the contact wire needs to be solved.

An embodiment of the present invention provides a fiber-reinforced copper matrix composite contact wire, the specific structure of which is shown in FIG. 1 . It is composed of two parts: reinforced core 1, copper alloy matrix 2, suspension groove 3 and alloy type identification groove 4. The highly conductive copper alloy matrix 2 is uniformly covered by copper wire and carbon fiber bundles through continuous composite extrusion process. Braided reinforcing core 1.

In practical applications, as shown in Figure 2, the reinforcing core is formed by interlacing carbon fiber bundles and copper alloy wires.

In practical applications, the reinforced core can also be composed of carbon fiber bundles and copper alloys.

Suspension grooves and alloy type identification grooves are also arranged on the outer surface of the fiber-reinforced copper matrix composite material contact wire. The suspension grooves are two symmetrical grooves located on the upper part of the cross-section of the contact wire for suspension. Alloy type identification grooves are shallow grooves located on the upper surface of the contact wire section, of which one copper-tin alloy identification groove is located directly above; one copper-chromium-zirconium alloy identification groove is located on one side, at an angle with the center line 22.5°; There are 2 copper-silver alloy identification grooves, which are left and right symmetrical, with a central angle of 45.0°; There are 3 copper-magnesium alloy identification grooves, 2 symmetrical, with a central angle of 45.0°, and the remaining 1 is located directly above .

The types of alloying elements included in the copper alloy matrix and the reinforcing core are the same, and the mass percentages of the alloying elements added in the copper alloy matrix and the reinforcing core are not higher than a set threshold, which can be 0.4%. The alloy element added in the copper alloy matrix is copper silver or copper tin or copper magnesium alloy, and the copper alloy wire included in the copper alloy matrix and the reinforcing core is a low-tin copper alloy.

The copper alloy matrix is evenly coated on the surface of the reinforcing core by extrusion process, and the cross-sectional structure meets the requirements of TB/T2809 "Copper and Copper Alloy Contact Wires for Electrified Railways" to obtain fiber-reinforced copper-based composite contact wires.

The forming process of the fiber-reinforced copper-based composite contact wire in the embodiment of the present invention mainly includes: firstly, placing the reinforcing core in an N ₂ gas protective atmosphere, and performing copper hanging and rounding treatment on the reinforcing core. Then, the reinforcing core and the low-tin copper alloy rod as the copper alloy matrix are respectively placed in an extruder for continuous extrusion coating to obtain a billet rod of composite material. Finally, the composite billet is placed on a drawing machine for multi-mode cold drawing to form a composite contact wire.

In Figure 3, the reinforcement core structure of the fiber reinforced copper matrix composite contact wire is obtained by interlacing carbon fiber bundles and copper alloy wires, so the reinforcement core has repeatability in the axial direction, and the shortest repeating section is called the characteristic cycle section , the radial section of the characteristic cycle segment is called the characteristic section. On a characteristic cross-section of the reinforced core, it can be divided into several substructures in which carbon fiber bundles and copper alloy wires are closely interlaced. Each substructure includes the direction of revolution around the center of the reinforced core and the direction of rotation around the center of the substructure. That is, a plurality of substructures are included in the radial section of each characteristic cycle section, and the plurality of substructures are symmetrically arranged around the center of the reinforcing core, and the carbon fiber bundles and copper alloy wires in each substructure surround the The center of the substructure spins.

Example 1:

Take the 12K fiber bundle of T700SC carbon fiber and tin-copper (0.15% tin content ratio) alloy wire, and place them in a braiding machine for interlaced braiding. The resulting reinforced core is shown in Figure 2. , Copper cladding and rounding treatment are carried out on the reinforcing core.

In its characteristic cycle section, it can be regarded as a triangular substructure 5 composed of 2 bundles of carbon fiber bundles 3 and a copper alloy wire 4, and 6 triangular substructures 5 are tightly wrapped around a copper alloy wire, and then all The triangular substructure 5 is helically drawn out, and the spin directions of adjacent triangular substructures 5 are opposite. In a characteristic cycle section of the reinforcing core in this embodiment, it can be seen that the triangular substructure 5 is spirally drawn out along the axial direction, during which the triangular substructure spins 360° and closely revolves around a copper alloy wire for 180°. In this embodiment, the carbon fiber bundle 3 and the copper alloy wire 4 have the same cross-sectional diameter. In the characteristic section of the reinforcing core, the area ratio of the carbon fiber bundle 3 to the copper alloy wire 4 is close to 3:2.

Example 2:

Take the fiber bundle of SYT49 carbon fiber and silver-copper alloy wire (silver content is 0.10% mass fraction ratio), place in the braiding machine to carry out interlaced braiding process, the reinforced core obtained is shown in Figure 3, in N ₂ gas protective atmosphere , Copper-clad the reinforcing core and rounded.

In the general circulation section of the reinforced core, it can be regarded as a paired substructure 6 composed of a bundle of carbon fiber bundles 3 and a copper alloy wire 4, and eight paired substructures 6 are tightly surrounded and then spirally drawn out. Adjacent pairs of substructures 6 have the same helical direction. In this embodiment, the carbon fiber bundle 3 and the copper alloy wire 4 have the same cross-sectional diameter. In the characteristic section of the reinforcing core, the area ratio of the carbon fiber bundle 3 to the copper alloy wire 4 is close to 1:1.

In summary, the fiber-reinforced copper-based composite contact wire provided by the embodiment of the present invention uses a high-conductivity copper alloy as a matrix, and uses a braided core of copper wire and carbon fiber bundles or a composite core of copper and carbon fiber bundles as a reinforcing core. The matrix is uniformly coated on the surface of the reinforced core by extrusion process, and the fiber reinforced copper matrix composite material contact wire whose structure and performance meet the requirements of the iron standard is obtained. While ensuring excellent electrical conductivity, the composite contact wire can increase the maximum suspension tension of the line, reduce the weight of the contact wire, increase the maximum running speed of the train and improve the overall safety factor of the contact wire.

The fiber-reinforced copper-based composite contact wire provided by the embodiment of the present invention mainly uses carbon fiber to withstand the tension applied to the contact wire, and uses a high-conductivity matrix to conduct current, which improves its service safety factor and saves electric energy. The contact wire can not only The tensile strength of the copper alloy matrix is greatly improved, and high electrical conductivity can be guaranteed.

The quality of the carbon fiber in the fiber-reinforced copper-based composite contact wire provided by the embodiment of the present invention is about a quarter of the same volume of copper, which can reduce the weight of the contact wire; there is no potential between the carbon fiber and copper and the added alloy elements Poor, can improve the corrosion resistance of the contact wire as a whole;

The fiber-reinforced copper-based composite material contact wire provided in the embodiment of the present invention adopts a continuous composite extrusion process, and there is no aging process in the processing process.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary for implementing the present invention.

It can be seen from the above description of the implementation manners that those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM, disk , CD, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments of the present invention.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiments. The device and system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A fiber-reinforced copper-based composite material contact wire, characterized in that it comprises: a reinforcing core and a copper alloy matrix, the copper alloy matrix is evenly coated on the surface of the reinforcing core by composite extrusion, the reinforcing The core consists of copper alloy wires and carbon fiber bundles. 2 . The fiber-reinforced copper matrix composite contact wire according to claim 1 , wherein the reinforcing core is formed by interlacing braiding of carbon fiber bundles and copper alloy wires. 3 . 3. The fiber-reinforced copper matrix composite contact wire according to claim 1, characterized in that the reinforcing core is composed of carbon fiber bundles and copper alloys. 4. The fiber-reinforced copper-based composite contact wire according to claim 1, characterized in that, the outer surface of the fiber-reinforced copper-based composite contact wire is also provided with a suspension groove, and the suspension groove is located at Two symmetrical grooves for suspension on the upper part of the contact wire cross-section. 5. The fiber reinforced copper matrix composite material contact wire according to claim 1, characterized in that, the outer surface of the fiber reinforced copper matrix composite material contact wire is also provided with an alloy type identification groove, and the alloy type identification Grooves are shallow grooves located on the upper surface of the cross-section of the contact wire. 6. The fiber-reinforced copper matrix composite contact wire according to any one of claims 1 to 5, characterized in that, the alloy elements included in the copper alloy matrix and the reinforcing core are of the same type, and the copper The mass percentage of alloy elements added in the alloy matrix and the reinforcing core is not higher than the set threshold. 7. The fiber-reinforced copper matrix composite contact wire according to claim 6, characterized in that the alloying elements added to the copper alloy matrix are copper-silver or copper-tin or copper-magnesium alloy. 8. The fiber-reinforced copper matrix composite contact wire according to claims 1 to 7, characterized in that, the axial direction of the reinforcing core includes a plurality of repeated characteristic cycle segments, and the radial section of each characteristic cycle segment includes A substructure made of carbon fiber bundles arranged with copper alloy wires. 9. The fiber-reinforced copper matrix composite contact wire according to claim 8, characterized in that, in each of the substructures, one or more carbon fiber bundles and one or more copper alloy wires are interlaced and arranged. 10. The fiber-reinforced copper-matrix composite contact wire according to claim 1, characterized in that a plurality of said substructures are included in the radial section of each characteristic cycle section, and a plurality of said substructures surround said The center of the reinforcing core is arranged symmetrically, and the carbon fiber bundles and copper alloy wires in each substructure rotate around the center of the substructure.