CN217035263U - A device for improving the electrical conductivity of metal strands - Google Patents

Abstract

The utility model belongs to the field of equipment for preparing conductive composite materials, in particular to a device for improving the conductivity of metal stranded wires. The device includes: a sealing chamber and a process gas gas path mechanism for introducing process gas into the sealing chamber, a feeding mechanism and a receiving mechanism are arranged in the sealing chamber, and a heating mechanism is sequentially arranged between the feeding mechanism and the material receiving mechanism. Mechanisms and Stranding Mechanisms. In the utility model, the production process is completed in the same sealed chamber, which avoids the interface oxidation and the introduction of surface impurities caused by the contact of the graphene-metal composite wire with air during the packaging, storage, and transportation processes. adverse effects, improve the conductivity of the graphene metal composite stranded wire.

Description

A device for improving the electrical conductivity of metal strands

technical field

The utility model belongs to the technical field of equipment for preparing conductive composite materials, in particular to a device for improving the conductivity of metal stranded wires.

Background technique

Wire and cable are wire products that transmit electrical (magnetic) energy, transmit information, and realize electromagnetic energy conversion. There are many kinds of products in the wire and cable industry, involving many fields of the national economy, such as electric power, construction, communication, manufacturing, etc.

Metal materials are one of the most important raw materials in the wire and cable industry, and their quality will directly affect the development of the entire industry. At this stage, the wire and cable industry generally uses copper, aluminum, tin, nickel and other non-ferrous metals as conductors. Among them, the electrical conductivity of pure copper is 5.8×10 ⁷ S/m (at room temperature), which is second only to silver among metals (at room temperature, the electrical conductivity is 6.3×10 ⁷ S/m), and the cost is low, which is the most widely used. A wide range of conductor materials commonly used to make wires.

In some specific environments, such as the catenary wire above the high-speed rail track, the electric power is connected from the wire to the car through the pantograph of the train body. When the speed of the train reaches 300km/h or more, the friction between the pantograph and the catenary wire will generate high temperature. This specific use environment requires the wire to have excellent conductivity, flexibility, hardness and strength. However, the strength of copper wires is not good, and the conductivity needs to be further improved.

In order to solve the above problems, people try to grow graphene on the surface of copper wires to obtain graphene-copper composite wires, and then twist multiple graphene-copper composite wires into graphene-copper composite stranded wires to further improve the strength and conductivity of copper wires. sex.

However, when the graphene-copper composite stranded wire is prepared by the existing device, the electrical conductivity of the graphene-copper composite stranded wire is poor.

Utility model content

In view of the above adopt existing device to produce graphene-copper composite stranded wire, the shortcoming of the poor conductivity of the obtained graphene-copper composite stranded wire, the purpose of this utility model is to provide a kind of device that improves the conductivity of metal stranded wire, to Further improve the conductivity of the graphene-copper composite stranded wire.

In the process of researching the preparation of graphene metal composite materials, the inventor found that due to the limitations of equipment and production conditions, when producing graphene-copper composite wires at this stage, it is necessary to prepare graphene-copper composite wires in a graphene growth equipment first, and then carry out subsequent processing. On the one hand, the current graphene growth equipment is mainly for foil metal substrates, and there are few preparation equipment for metal wires. Using foil equipment to prepare graphene on wire substrates will cause huge waste of equipment and energy. In addition, during the packaging, storage, and transportation of graphene-metal composites, the surface of the metal substrate will be exposed to water vapor and oxygen in the air, resulting in oxidation of the metal surface and introduction of impurities on the graphene surface. The contact between the metal composite wire and the transport device will cause wrinkles, and these factors cause the poor uniformity of the interface contact between the graphene and the metal wire, which affects the overall electrical conductivity of the composite. In addition, the processes of packaging, storage, transportation and post-twisting are cumbersome, time-consuming and low in production capacity, resulting in unnecessary waste of energy and resources.

In order to solve the above problems, the present invention is achieved through the following technical solutions:

The purpose of this utility model is to provide a device for improving the conductivity of metal stranded wires, including:

a sealing chamber and a process gas gas pipeline for feeding process gas into the sealing chamber;

A feeding mechanism and a receiving mechanism are arranged in the sealed chamber, and a heating mechanism and a stranding mechanism are sequentially arranged between the feeding mechanism and the receiving mechanism. Heating is applied to crack the carbon source and grow graphene on the metal wire.

In the present invention, the term "multiple" refers to a positive integer of ≥2.

In the present invention, the term "metal wire" includes but is not limited to: copper wire or nickel wire or iron wire or aluminum wire or tin wire or cobalt wire or gold wire or silver wire or copper, nickel, iron, aluminum, tin, cobalt An alloy wire formed of at least two metals among , platinum, gold and silver.

In the present invention, the term "process gas" includes but is not limited to: hydrogen gas or inert gas or a mixture of the two.

In the present invention, the term "inert gas" includes nitrogen, helium, neon, argon and other gases.

Optionally, the feeding mechanism includes several feeding rollers.

Optionally, the device for improving the electrical conductivity of the metal stranded wire further includes a wire bundling mechanism for preventing the metal wires from tangling with each other, and the wire bundling mechanism is arranged between the feeding mechanism and the stranded wire mechanism.

Optionally, the wire beam splitting mechanism includes a plurality of beam splitting plates, all the beam splitting plates are vertically arranged between the feeding mechanism and the stranding mechanism in sequence along the feeding direction of the metal wires. A number of beam splitting holes are opened on the plate surface.

Optionally, the wire splitting mechanism includes a plurality of split teeth and all the split teeth are vertically arranged between the feeding mechanism and the stranding mechanism in sequence along the feeding direction of the metal wire. Arranged vertically side by side.

Optionally, the device for improving the electrical conductivity of the metal stranded wire further includes a high-temperature pressing mechanism for pressing the graphene metal composite stranded wire, and the high-temperature pressing mechanism is arranged between the stranded wire mechanism and the receiving mechanism.

Optionally, the device for improving the electrical conductivity of the metal stranded wire further includes a vacuuming mechanism for reducing the pressure in the sealed chamber.

Optionally, the device for improving the electrical conductivity of the metal stranded wire further comprises a gaseous carbon source gas circuit mechanism for introducing the gaseous carbon source into the sealed chamber.

As mentioned above, the device for improving the electrical conductivity of the metal stranded wire provided by the present invention has the following beneficial effects:

(1) In the present invention, by combining the CVD graphene preparation process with the metal stranded wire process, a graphene metal composite stranded wire is obtained, which can improve the electrical conductivity of the metal.

(2) After the multi-channel metal wire is grown through the high-temperature graphene growth process, the grain size of the polycrystalline metal wire will be further increased, and the grain boundary will be reduced. The reduction of the grain boundary is conducive to the improvement of the electrical conductivity and thermal conductivity of the wire.

(3) Complete the graphene growth process and the stranding process in the same sealed chamber. During the production process, the graphene metal composite wire will not be in contact with the outside air, which avoids the oxidation caused by contacting the air during the transfer process and the introduction of impurities. The detrimental effect of the interfacial uniformity between the graphene and the metal wire, which in turn improves the electrical conductivity of the composite stranded wire.

(4) The graphene growth and stranding process is completed in the same sealed chamber, and there is no need to transfer, and the graphene metal composite wire is not in contact with the transfer equipment, so no wrinkles will be generated, thereby avoiding the wrinkles between graphene and metal wires. The adverse effect of the interfacial uniformity between them further improves the electrical conductivity of the composite stranded wire.

(5) The wire bundling mechanism can avoid wire entanglement, which is conducive to the smooth progress of production.

(6) The device of the present utility model has a wide range of applications, not only can produce graphene metal composite stranded wire products, but also can produce graphene metal composite wires according to the needs of medium, large and even extra-large motors, transformers, etc. Bands.

(7) The production process is carried out on a roll-to-roll basis, avoiding the repeated heating and cooling processes during the graphene growth process, and avoiding the packaging, storage and transportation processes of the graphene metal composite wire, shortening the process flow, thereby reducing energy consumption and costs. , and increased productivity and efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of the device for improving the electrical conductivity of a metal stranded wire according to Embodiment 1;

FIG. 2 is a schematic structural diagram of the device for improving the electrical conductivity of the metal stranded wire according to the second embodiment.

reference number

1 is the sealed chamber, 2 is the feeding roller, 3 is the metal wire, 4 is the process gas gas path mechanism, 5 is the beam splitter plate, 6 is the heating mechanism, 7 is the vacuuming mechanism, 8 is the stranding mechanism, and 9 is the receiving mechanism. For the coiling machine, 10 is a flow valve, 11 is a relief valve, 12 is a wire pressing mechanism, 13 is a gaseous carbon source gas path mechanism, and 14 is a beam splitter tooth.

Detailed ways

The present invention will be further described below through specific embodiments, and the embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

The utility model provides a device for improving the conductivity of metal stranded wires, comprising:

a sealing chamber, a process gas gas path mechanism for introducing process gas into the sealing chamber, and a vacuuming mechanism for reducing the pressure in the sealing chamber;

A feeding mechanism and a receiving mechanism are arranged in the sealed chamber. The feeding mechanism includes several feeding rollers. A heating mechanism and a stranding mechanism are arranged between the feeding mechanism and the feeding mechanism in turn. The wire beam splitting mechanism in which the metal substrates are intertwined, and the heating mechanism is used to heat the environment in the sealed chamber or the metal wires, so as to crack the carbon source and grow graphene on the metal wires.

In one embodiment of the present utility model, the wire splitting mechanism includes a plurality of splitting plates, all the splitting plates are vertically arranged between the feeding mechanism and the stranding mechanism in sequence along the feeding direction of the metal wires. A number of beam splitting holes are opened on it.

In another embodiment of the present invention, the wire splitting mechanism includes a plurality of splitting teeth, all the splitting teeth are vertically arranged between the feeding mechanism and the stranding mechanism in turn along the feeding direction of the metal wire, and the splitting teeth are vertically arranged along the feeding direction of the metal wire. Straight side by side.

In another embodiment of the present invention, the device for improving the electrical conductivity of the metal stranded wire further includes a high temperature pressing mechanism for pressing the graphene metal composite stranded wire, and the high temperature pressing mechanism is arranged between the stranded wire mechanism and the receiving mechanism.

In another embodiment of the present invention, the device for improving the electrical conductivity of the metal stranded wire further includes a gaseous carbon source gas circuit mechanism for introducing the gaseous carbon source into the sealed chamber.

Example 1

As shown in Figure 1, the device for improving the electrical conductivity of metal strands includes:

A sealed chamber 1, a process gas gas path mechanism 4 for introducing process gas into the sealed chamber, and a vacuum mechanism 7 for reducing the pressure in the sealed chamber 1;

The sealing chamber 1 is provided with a feeding mechanism, a wire splitting mechanism, a stranding mechanism 8 and a receiving mechanism in sequence;

The feeding mechanism includes several feeding rollers 2, and all feeding rollers 2 are arranged side by side or staggered along the vertical direction;

The wire splitting mechanism includes a plurality of splitting plates 5. All the splitting plates 5 are vertically arranged between the feeding mechanism and the stranding mechanism 8 in turn along the feeding direction of the metal wires. different metal wires enter the twisting mechanism 8 through different beam splitting holes on the board surface of the same beam splitting plate 5 respectively, and the mutual entanglement of the metal wires can be avoided by this setting;

The stranding mechanism 8 is used for twisting the multiple strands of single graphene metal-based composite wires into one strand, and it specifically adopts a stranding machine;

The rewinding mechanism specifically adopts a rewinding machine 9, and the rewinding machine 9 stores the stranded graphene metal composite stranded wire into a roll;

A heating mechanism 6 is also arranged between the feeding mechanism and the stranding mechanism 8, and the heating mechanism 6 adopts a heater, and the heater is used to heat the internal environment of the sealed chamber 1 or the metal wire 3, so that the carbon source is heated at a high temperature and the metal wire 3 is heated. cracking under the catalysis, and then grow graphene on the surface of the metal wire 3; the heater can specifically use an electromagnetic heater, a resistance wire heating jacket or an infrared heating tube, and the heating mechanism 6 includes a heating assembly, a temperature sensor and a temperature controller, and the heating assembly It is used to heat the internal environment of the sealed chamber 1 or the metal wire 3. The temperature sensor is used to monitor the temperature of the internal environment of the sealed chamber or the metal wire. The temperature controller receives the data of the temperature sensor and controls the heating according to the data of the temperature sensor. Turning components on and off. Using the sensor to detect the signal and transmitting the relevant signal to the controller, the controller controls the execution element to perform the action according to the received signal is the prior art, and will not be repeated here;

The process gas gas path mechanism 4 communicates with one end of the sealed chamber 1; the process gas gas path mechanism 4 is provided with a process gas storage container and a process gas outlet pipeline communicated with the process gas storage container, and an on-off valve ( Not shown) and one-way valve (not shown), the one-way valve can control the one-way flow of process gas from the inside to the outside, and prevent the gas from pouring back into the process gas storage container. The process gas gas path mechanism 4 is in the prior art, and has nothing to do with the improvement point, so it will not be repeated here. A flow valve 10 is provided on the pipeline connecting the sealed chamber 1 and the process gas gas circuit mechanism 4, and the flow valve 10 can control the flow rate of the process gas (hydrogen, inert gas or a mixture of the two) discharged from the process gas storage container.

The vacuum pumping mechanism 7 includes a vacuum pump and a pipeline communicated with the vacuum pump. The pipeline is provided with an on-off valve (not shown) and a vacuum gauge (not shown), and the vacuum pumping mechanism 7 is an existing technology and has nothing to do with the improvement point. Here I will not repeat them. The vacuum pumping mechanism 7 can quickly pump the pressure in the sealed chamber 1 to a low vacuum state, and extract the oxygen and impurities in the sealed chamber 1 out of the sealed chamber 1, so that the sealed chamber 1 is in a clean state, avoiding the process of Influence of oxygen or impurities.

The working process of the device of this embodiment is as follows:

The internal environment of the sealed chamber 1 is evacuated to a low vacuum state (eg < 0.1Pa) by the vacuuming mechanism 7, and then the vacuuming mechanism is closed. During the vacuuming process, the vacuuming mechanism 7 will extract and discharge the gas in the sealed chamber 1. into the atmosphere, so that the environment in the sealed chamber 1 is in an oxygen-free state; process gas (such as hydrogen, inert gas or a mixture of the two) is introduced into the sealed chamber 1 through the process gas gas path mechanism 4;

The surface of multiple single metal wires is coated with a solid carbon source (such as one or more of polymethyl methacrylate, polydimethylsiloxane, polystyrene, polycyclic aromatic hydrocarbon compounds) by soaking Solution (solvent used in the solution such as one or more of ethanol, acetone, ethyl lactate, ethyl acetate, xylene, toluene, tetrahydrofuran, chloroform, dimethylformamide and dichloroethane), and rolled up into a metal wire coil;

Subsequently, the multiple metal wire coils coated with solid carbon sources are fed through the feeding rollers 2 respectively. Under the pulling action of the winding mechanism 9, the single metal wires at all feeding rollers 2 pass through the same sub-bundle respectively. The different beam splitting holes on the plate surface of the plate 5 enter the stranding mechanism 8, and the stranding mechanism 8 twists a plurality of metal wires into one strand; and is then received into a roll by the winder 9 to obtain a graphene metal composite strand.

During the process of pulling the metal wire to the winder 9, the heating mechanism 6 arranged on the feeding path of the metal wire 3 heats the metal wire. Under the catalytic action of high temperature, process gas and metal wire 3, the solid carbon source cracking, and growing graphene on the surface of the metal wire 3 to obtain a graphene-metal composite wire. After the graphene metal composite wire enters the twisting mechanism 8, the twisting mechanism 8 twists a plurality of graphene metal composite wires into one strand, and is then received into a roll by the winder 9.

The graphene metal composite stranded wire prepared in this example has excellent electrical conductivity. Graphene growth, twisting and winding are carried out in the same sealed chamber. During the production process, the graphene metal composite wire will not be in contact with the outside air, which avoids the interface oxidation and the introduction of surface impurities caused by contact with the air during the transport process. The detrimental effect of the interfacial uniformity between the graphene and the metal wire, which in turn improves the electrical conductivity of the composite stranded wire.

Secondly, during the production process, there is no need for transport, and the graphene-metal composite wire is not in contact with the transport equipment, so there will be no wrinkles, thus avoiding the adverse effect of wrinkles on the interface uniformity between the graphene and the metal wire, and further improving the performance. Conductivity of composite strands.

In addition, after the multi-channel metal wire is grown through the high-temperature graphene growth process, the grain size of the polycrystalline metal wire will be further increased, and the grain boundary will be reduced. The reduction of the grain boundary is conducive to the improvement of the electrical and thermal conductivity of the wire.

Example 2

The difference between this embodiment and Embodiment 1 is that: the other end of the sealed chamber 1 is provided with a vent valve 11, through which the gas with higher pressure than atmospheric pressure in the sealed chamber 1 can be discharged out of the sealed chamber 1; and One end of the sealed chamber 1 connected with the process gas gas path mechanism 4 is also connected with a gaseous carbon source gas path mechanism 13 for introducing a gaseous carbon source into the sealed chamber 1, and the gaseous carbon source gas path mechanism 13 is provided with a gaseous carbon source. The source storage container and the gaseous carbon source gas outlet pipeline communicated with the gaseous carbon source storage container, the gaseous carbon source gas outlet pipeline is provided with an on-off valve (not shown) and a one-way valve (not shown), and the one-way valve can control the gaseous carbon source. The carbon source flows in one direction from the inside to the outside, preventing the gas from pouring back into the gaseous carbon source storage container. A flow valve 10 is provided on the pipeline connecting the sealed chamber 1 and the gaseous carbon source gas circuit mechanism 13, and the flow valve 10 can control the gaseous carbon source (such as methane, ethylene, acetylene, carbon monoxide and carbon dioxide) discharged from the gaseous carbon source storage container. one or more) of the flow. The gaseous carbon source gas path mechanism 13 is in the prior art, and has nothing to do with the improvement point, and will not be repeated here;

The wire splitting mechanism includes a plurality of splitting teeth 14. All the splitting teeth 14 are vertically arranged between the feeding mechanism and the stranding mechanism 8 in turn along the feeding direction of the metal wire. The splitting teeth 14 are arranged in parallel along the vertical direction. The metal wires enter the twisting mechanism 8 through different slots formed by the splitting teeth respectively, and the mutual entanglement of the metal wires is avoided by this arrangement;

It also includes a high-temperature pressing mechanism 10 for pressing the graphene metal composite stranded wire. The high-temperature pressing mechanism 10 is arranged between the stranding mechanism 8 and the receiving mechanism, and the high-temperature pressing mechanism 10 adopts a roller press.

The sealed chamber 1 is pumped to a low degree of vacuum through the vacuum pumping mechanism 7, and then the vacuum pumping mechanism is closed, and the process gas is introduced into the sealed chamber 1 through the process gas gas path mechanism 4 until the pressure in the sealed chamber 1 is at normal pressure, and the process continues. Pour in the process gas, open the vent valve 11, and discharge the gas above the atmospheric pressure in the sealed chamber 1 out of the sealed chamber 1 through the vent valve 11, so that the gas entering and discharged from the sealed chamber 1 reaches a dynamic equilibrium state to adapt to the Process requirements under normal pressure conditions.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims (8)

1. An apparatus for improving conductivity of a metal strand, comprising:

the device comprises a sealed cavity and a process gas path mechanism for introducing process gas into the sealed cavity;

the device comprises a sealed cavity, and is characterized in that a feeding mechanism and a receiving mechanism are arranged in the sealed cavity, a heating mechanism and a wire twisting mechanism are sequentially arranged between the feeding mechanism and the receiving mechanism, and the heating mechanism is used for heating the environment in the sealed cavity or a metal wire so as to crack a carbon source and grow graphene on the metal wire.

2. The apparatus of claim 1, wherein the feeding mechanism comprises a plurality of feeding rollers.

3. The apparatus for improving the conductivity of a metal strand as claimed in claim 1, further comprising a wire splitting mechanism for preventing the metal wires from being tangled with each other, the wire splitting mechanism being disposed between the feeding mechanism and the stranding mechanism.

4. The device for improving the conductivity of the metal stranded wire according to claim 3, wherein the wire splitting mechanism comprises a plurality of splitting plates, all the splitting plates are vertically arranged between the feeding mechanism and the stranding mechanism in sequence along the feeding direction of the metal wire, and a plurality of splitting holes are formed in the plate surface of each splitting plate.

5. The device for improving the conductivity of the metal stranded wire according to claim 3, wherein the wire splitting mechanism comprises a plurality of splitting teeth, all the splitting teeth are vertically arranged between the feeding mechanism and the stranding mechanism in sequence along the feeding direction of the metal wire, and the splitting teeth are arranged in parallel along the vertical direction.

6. The device for improving the conductivity of the metal stranded wire according to claim 1, further comprising a high-temperature pressing mechanism for pressing the graphene metal composite stranded wire, wherein the high-temperature pressing mechanism is arranged between the wire twisting mechanism and the material receiving mechanism.

7. The apparatus for increasing the conductivity of a metal strand as in claim 1, further comprising a vacuum mechanism for reducing the pressure within said sealed chamber.

8. The apparatus for improving conductivity of a metal strand as claimed in claim 1, further comprising a gaseous carbon source gas path mechanism for introducing a gaseous carbon source into the sealed chamber.

Images