CN219093149U

CN219093149U - High-temperature manufacturing device for cable conductor monofilaments

Info

Publication number: CN219093149U
Application number: CN202222489724.XU
Authority: CN
Inventors: 徐升
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-05-30
Anticipated expiration: 2032-09-20

Abstract

The utility model relates to a processing device for drawing copper conductor into monofilaments, in particular to a high-temperature manufacturing device for cable conductor monofilaments, which is characterized by further comprising a wire heater, a 2-5 die progressive drawing device or rolling device and a cooler, wherein the components are sequentially arranged according to a paying-off device, the wire heater, the progressive drawing device or rolling device, the cooler, a tension wire storage device and a wire winding machine to form a production line; and an isolation device for preventing oxidation of the copper conductor in a high-temperature state is arranged in the wire heater and the die-by-die stretching device or the rolling device. The utility model has the advantages that: the influence caused by cold work hardening is avoided, annealing treatment is not needed after single wire drawing, the number of drawing stages of drawing equipment is reduced, the energy consumption of the drawing equipment is reduced, the production efficiency is improved, and the conductor resistivity and the resistance value meeting the standard requirements can be obtained.

Description

High-temperature manufacturing device for cable conductor monofilaments

Technical Field

The utility model relates to a processing device for stretching copper conductors into monofilaments, in particular to a high-temperature manufacturing device for cable conductor monofilaments. The utility model is also applicable to the drawing of conductors made of other metal materials into filaments, such as aluminum conductors.

Background

In the existing cable conductor production technology, copper conductors are all drawn into copper single wires by adopting copper rods, and a single wire drawing device adopting a 13-die large drawing machine in the prior art is shown in the accompanying figure 1: comprises a pay-off rack, a 13-die wire drawing host machine, an annealing machine, a tension wire storage rack and a wire winding machine which are sequentially arranged; the functions of the components are as follows: 1. the pay-off rack has the functions that the coiled 8MM copper rod is paid out through the pay-off rack and enters the large-pulling host machine, and the paying-off process can be ensured not to be disordered and knotted; 2. the 13-die large drawing host machine stretches the 8-mm copper rod to the wire diameter required by the process through die-by-die continuous stretching. The 13 dies are sequentially connected in series by 13 wire drawing dies with gradually smaller diameters, so that the copper rod is stretched to the wire diameter required by the process through die-by-die continuous stretching; 3. the annealing machine is used for heating the wire hardened in the drawing process to an annealing temperature in a short-circuit heating mode to generate annealing softening so as to reduce the resistivity of the wire and improve the elongation. In the annealing process, inert gas protection is needed to be carried out on the wire so as to prevent the wire from being oxidized; 4. the tension wire storage frame is used for maintaining the tension of the wire in the continuous stretching process and storing the wire in continuous stretching when the full disc of the wire winding machine is switched; 5. the wire winding machine is used for winding the stretched wire into a wire coil or a looping cylinder.

The single wire drawing process is as follows: paying out a copper rod with a large wire diameter (such as 8 mm) through a paying-off device to enter a main machine of a large drawing machine, and drawing the copper rod to the wire diameter required by the process by the main machine of the large drawing machine through progressive die-by-die continuous drawing; then entering an annealing machine, heating the wire hardened in the stretching process in a short-circuit heating mode to reach an annealing temperature to generate annealing softening so as to reduce single-wire resistivity and improve elongation; and then further maintaining the tension of the wire in the stretching process through a tension wire storage frame, and finally receiving the stretched wire into a wire coil through a wire winding machine.

In the prior art, the single-wire rolling is carried out by adopting a rolling mill, as shown in figure 2, compared with the single-wire drawing, wherein only a 13-die wire drawing main machine is changed into the rolling mill, and other parts are basically the same.

However, the above-described technique has the following disadvantages:

firstly, the copper rod is drawn in a cold state, and larger equipment pulling force is needed, so that larger equipment energy consumption is needed, and the process is more and complex, so that the production efficiency is low. In addition, the drawing of the copper single wire in a cold state can cause the resistivity of the single wire to be increased (cold work hardening), so that the resistance value of the copper conductor is increased, and although an annealing process is arranged for softening later, the copper single wire is a remedial measure after cold work hardening, and the method is energy-consuming and time-consuming.

Disclosure of Invention

The utility model aims to provide a high-temperature manufacturing device for a cable conductor monofilament, which reduces the working flow, reduces the equipment energy consumption and improves the production efficiency according to the defects of the prior art.

The aim of the utility model is achieved by the following ways:

the high-temperature manufacturing device for the cable conductor monofilaments comprises a paying-off device, a tension wire storage device and a wire collecting machine, and is structurally characterized by further comprising a wire heater, a 2-5 die progressive stretching device or rolling device and a cooler, wherein the components are sequentially arranged according to the paying-off device, the wire heater, the progressive stretching device or rolling device, the cooler, the tension wire storage device and the wire collecting machine to form a production line; and an isolation device for preventing oxidation of the copper conductor in a high-temperature state is arranged in the wire heater and the die-by-die stretching device or the rolling device.

The drawing or rolling flow of the high-temperature manufacturing device for the cable conductor monofilaments is as follows:

1) The paying-off device spreads the copper rod and connects the copper rod into the lead heater; 2) The lead heater heats the connected copper rod, and after the copper rod is heated to reach a set temperature, the copper rod in a high-temperature state is connected to a die-by-die stretching device or a rolling device; 3) The die-by-die stretching device or the rolling device stretches or rolls the copper rod in a high-temperature state to enable the copper rod to reach the wire diameter required by the process, and the copper rod becomes a copper conductor single wire; 4) The copper conductor single wire then enters a cooler for cooling, and the cooled copper conductor single wire is transmitted to a tension wire storage rack and a wire winding machine for wire storage and wire winding.

The utility model adopts a mode of drawing or rolling a copper conductor at a high temperature, firstly heats the conductor, causes the conductor to be drawn or rolled at the high temperature, then cools the conductor, and does not need to adopt an annealing machine with a complex structure, but adopts a wire heater with a simple structure. The utility model has good ductility and drawing effect based on copper metal for the wire in a high temperature state, can save time and labor, greatly reduces the equipment pulling force, reduces the pulling pass from the existing ten ways to at least only needs double-mode pulling, and can achieve 3-4-mode pulling in most cases, thereby greatly saving the equipment cost and the equipment energy consumption and improving the production efficiency. In addition, the conductor under high-temperature drawing or rolling avoids cold work hardening, and annealing treatment is not needed, so that the production flow and the equipment structure are simplified, and meanwhile, the conductor resistance value parameter can be ensured to meet the standard requirement.

The utility model may further be embodied as:

the isolating device is used for performing an anti-oxidation measure on the copper conductor in a high-temperature state, and even the isolating device can be arranged on the wire heater, the progressive die stretching device or the rolling device and even the cooler, so that the wire heater, the progressive die stretching device or the rolling device and the cooler perform anti-oxidation heating, stretching or rolling and cooling on the copper conductor in an air-isolated state.

Particularly, the isolating device is utilized to isolate air from the copper conductor in a high temperature state in the die-by-die stretching device or the rolling device, so that the copper conductor can be effectively protected from being oxidized or oxidized as little as possible in the stretching or rolling process, and the cold work hardening effect caused by excessive temperature drop of the conductor can be avoided.

It must be emphasized that this isolation is not absolute, not that there is no slight oxygen, but that it is certainly preferable not to oxidize, but that it is possible to minimize oxidation and control it within the allowable range. As far as the permissible range is concerned, it will be apparent to those skilled in the art from the field reality.

The isolation device further comprises the following specific components:

the isolating device is a pipeline filled with protective gas.

Such pipes are either square tubes, round tubes, or profiled tubes.

Either the wire heater, the die-by-die drawing device or the wire running part of the rolling device are all arranged in the pipeline, or the copper conductor in a high-temperature state runs through the pipeline.

When the wire heater, the progressive die stretching device or the wire part of the rolling device is arranged in the pipeline, the pipeline is a box body extending along the length direction, and the copper rod in a high-temperature state can be directly connected into the progressive die stretching device or the rolling device in the box body filled with the protective gas;

if only the copper conductor in the high temperature state passes through the pipe, the following steps are: the drawing dies of each stage in the progressive die drawing device or the rolling device are connected through a pipeline filled with protective gas, the stretched copper rod penetrates through the pipeline filled with protective gas, and the wire heater, the progressive die drawing device and the cooler can be connected through the pipeline filled with protective gas, so that the stretched copper rod penetrates through the pipeline filled with protective gas.

The isolating device pipeline is externally connected with a protective gas storage tank or a protective gas generator.

The shielding gas of the gas storage tank or the gas generator is either nitrogen, inert gas without radioactivity or steam.

The inert gas which is not radioactive is preferably selected from helium or argon.

The isolating device is a high-concentration lubricant dripping device which is arranged in the wire heater and/or the progressive die stretching device, wherein the progressive die stretching device lubricates and protects copper rods in a high-temperature state by adopting high-concentration lubricant before and/or during stretching of each stage of stretching dies, and the high-concentration lubricant dripping device is arranged above the position of the front side or rear side wire of each stage of stretching dies.

The isolating device is a high-concentration lubricant dripping device which is arranged in the wire heater and/or the rolling device, wherein in the rolling device, high-concentration lubricant is adopted to lubricate and protect a copper rod in a high-temperature state before and/or during rolling of each stage of rolling dies, and the high-concentration lubricant dripping device is arranged above the position of the front side or rear side wire of each stage of rolling dies.

The high-concentration lubricating liquid only needs to be dripped in a small amount, vaporization is generated on the surface of the high Wen Tonggan after the dripping, and a layer of oil film is further formed on the surface of the copper rod, so that excessive heat can be prevented from being taken away during stretching or rolling, the conductor temperature during stretching or rolling is ensured to be in a preset temperature range (the general falling range is not more than 50 ℃), and the phenomenon that the conductor temperature drops too much to generate a cold work hardening effect is avoided. On the other hand, the vaporized water vapor can also squeeze out the air on the surface of the high Wen Tonggan so as to avoid oxidization.

The two isolation schemes can be respectively applicable to a wire heater, a die-by-die stretching device or a rolling device and a cooler according to the situation.

The heating temperature of the wire heater is 270-600 ℃.

The heating temperature is also the set temperature required to be reached by the copper rod. The copper conductor is stretched or rolled in a heating state, and the problem that the resistivity of the conductor is increased due to the cold work hardening effect is avoided, so that the single wire annealing process of the existing single wire stretching process flow is not needed, the production flow is simplified, and the influence of the cold work hardening effect is avoided.

The heating temperature of the wire heater is preferably 450-550 ℃ and the optimum wire stretching operation temperature is 500 ℃.

The conductor heater is either an inductive conductor heater, a heat radiation conductor heater, or a resistive short circuit conductor heater. The above-mentioned heaters may be commercially available, and other heaters suitable for copper conductors may be selected in addition to the above-mentioned heaters.

In summary, the utility model provides a high-temperature manufacturing device for cable conductor monofilaments, which changes the original way of annealing after stretching, adopts the process of stretching after high-temperature heating, avoids the influence caused by cold work hardening, does not need annealing treatment, reduces the drawing and rolling modulus of drawing or rolling equipment, reduces the energy consumption and the production cost of the drawing and rolling equipment, and improves the production efficiency.

Drawings

Fig. 1 is a schematic diagram of a cable conductor filament drawing device in the prior art.

Fig. 2 is a schematic diagram of a prior art apparatus for rolling a monofilament of a cable conductor.

Fig. 3 is a schematic flow chart of the high-temperature manufacturing device for the cable conductor monofilaments.

The utility model is further described below with reference to examples.

Detailed Description

Best mode for carrying out the utility model:

the manufacturing device in this embodiment takes a die-by-die stretching device as an example, and the rolling device can replace the die-by-die stretching device with reference to this embodiment. Referring to fig. 3, the high-temperature manufacturing device for the cable conductor monofilaments comprises the following equipment systems: comprises a paying-off device 2, a guide wheel 3, a wire heater 4, a gas protection pipeline 5 used as an isolating device, a die-by-die stretching device 6, a protection cooling pipeline 7 used as a cooler, a tension wire storage frame 8 and a wire winding machine 10 which are arranged in sequence. There are three solutions for the gas protection pipe 5 as a separation device: firstly, the gas protection pipeline 5 is a box body extending along the length direction, at the moment, the wire heater 4 and the wire part of the progressive die stretching device 6 are both positioned in the gas protection pipeline 5, and the cooler adopts the gas protection pipeline as a protection cooling pipeline; secondly, the gas protection pipeline 5 is a wiring pipeline, and a wire heater and a high-temperature wire of the progressive die stretching device are arranged in the pipeline, so that copper conductors in heating and high-temperature states are ensured to pass through the pipeline, and excessive cooling and oxidation are avoided; thirdly, in the position of the wire heater 4, the gas protection pipe 5 is a box body which can accommodate the wire heater 4 and extends along the length direction, and in the die-by-die stretching device 6, the gas protection pipe 5 is a wiring pipe which is communicated with the rear port of the box body where the wire heater 4 is positioned, is arranged between the stretching dies at each stage and is connected to the front end side of the cooler, so that the copper conductor in the high temperature state is ensured to pass through the protection pipe.

The whole gas protection pipe 5 is filled with a protection gas of positive pressure in the cooler. When the gas protection pipeline 5 is a wiring pipeline, in the progressive die stretching device, the stretching dies of all stages are connected through a pipeline filled with the protection gas, and the stretched height Wen Tonggan 1 penetrates through the pipeline filled with the protection gas, and the pipeline filled with the protection gas plays a role in isolation and protection. In addition, in the die-by-die stretching device or the rolling device, a high-concentration lubricant dripping device can be used as an isolation device, namely, the high-concentration lubricant dripping device is arranged on each level of stretching die, and the copper rod in a high-temperature state is lubricated and protected by adopting high-concentration lubricant before and/or during stretching of each level of stretching die. The heating mode of the conductor heater includes, but is not limited to, induction heating, heat radiation heating, resistance short circuit heating, and the like. The shielding gas includes, but is not limited to, nitrogen.

The following description of the process is made by taking a copper rod 1 with a diameter of 8.0mm drawn into a copper single wire 9 with a diameter of 2.58mm as an example:

firstly, a copper rod 1 with the diameter of 8.0mm is pulled into a wire heater 4 for heating through a paying-off device 2 and a guide wheel 3, after the temperature of the copper rod is raised to a preset temperature of 500 ℃, the copper rod is pulled into a 2-5 die wire drawing machine 6 through a protection pipeline 5, 3 die combinations (the die hole diameter is 5.96 mm+3.85 mm+2.58 mm) are selected for drawing, and a small amount of high-concentration lubricating liquid is used for lubrication and protection during drawing (the high-concentration lubricating liquid can avoid taking away excessive heat so as to ensure that the conductor temperature during drawing is in a preset temperature range, thereby avoiding cold work hardening effect); the drawn copper single wire is cooled to about 50 ℃ by a protection cooling pipeline 7And after the wire is right, the wire is pulled to a take-up wire coil of the wire taking-up machine through a tension wire storage frame. In the whole process, the gas protection pipeline 5 is filled with nitrogen with the pressure of 0.3MPa to 0.4MPa to protect the copper rod in a high temperature state. The drawn copper single wire 9 with the thickness of 2.58mm has the direct current resistivity of 0.017006 Ω & mm at 20 ℃ tested ² And the elongation at break is 29 percent, and completely meets the requirements of the current national standard GB/T3953-2009.

The existing common large drawing machine uses a copper rod with the diameter of 8.0mm, draws a copper single wire with the diameter of 2.58mm, adopts a 8-pass matching module to carry out drawing (the die hole diameter of 6.61 mm+5.56 mm+4.67 mm+3.93 mm+3.34 mm+2.87 mm+2.61 mm+2.58 mm) and also carries out annealing treatment, and the resistivity and the elongation at break of the drawn copper single wire can meet the national standard requirements. Therefore, the utility model can effectively avoid the influence caused by cold work hardening, does not need annealing treatment, reduces the tensile modulus of the drawing equipment, reduces the energy consumption and the production cost of the drawing equipment, and realizes the established technical effect.

When the method is applied to the aluminum conductor, protective gas is not needed, and in addition, the heating temperature is also needed to be changed correspondingly according to the aluminum conductor.

The utility model is not described in part as in the prior art.

Claims

1. The high-temperature manufacturing device for the cable conductor monofilaments comprises a paying-off device, a tension wire storage device and a wire collecting machine, and is characterized by further comprising a wire heater, a 2-5 die progressive stretching device or rolling device and a cooler, wherein the components are sequentially arranged according to the paying-off device, the wire heater, the progressive stretching device or rolling device, the cooler, the tension wire storage device and the wire collecting machine to form a production line; and an isolation device for preventing oxidation of the copper conductor in a high-temperature state is arranged in the wire heater and the die-by-die stretching device or the rolling device.

2. The apparatus of claim 1, wherein the isolation device is a pipe filled with a protective gas, either a square pipe or a round pipe.

3. The apparatus according to claim 2, wherein the isolating device is a box-type pipe extending in a longitudinal direction and filled with a shielding gas, and the wire heater, the progressive drawing device or the wire feeding portion of the rolling device are all disposed in the pipe filled with the shielding gas.

4. The apparatus of claim 2, wherein the isolation means is a case extending in a longitudinal direction and filled with a protective gas, and the wire heater and the die-by-die drawing means or rolling means are installed in the pipe.

5. The apparatus for high temperature production of cable conductor monofilaments according to claim 2, wherein the copper conductor in a high temperature state is passed through the pipe filled with the shielding gas in a wire heater, a die-by-die drawing apparatus or a rolling apparatus.

6. The apparatus according to claim 4, wherein the drawing dies are connected by a protective gas filled pipe, and the drawn copper rod penetrates through the protective gas filled pipe.

7. The high-temperature manufacturing device for the cable conductor monofilaments according to claim 1, wherein the isolating device is a high-concentration lubricant dripping device which is arranged in the wire heater and/or the progressive die stretching device, wherein the progressive die stretching device is arranged above the positions of the front side or the rear side wires of each stage of stretching die.

8. The high-temperature manufacturing device for the cable conductor monofilaments according to claim 1, wherein the isolating device is a high-concentration lubricant dripping device which is arranged in the wire heater and/or the rolling device, wherein the high-concentration lubricant dripping device is arranged above the position of the front side or the rear side wire of each stage of rolling die in the rolling device.

9. The apparatus for high temperature production of cable conductor monofilaments of claim 1 wherein the wire heater has a heating temperature of 270-600 ℃.

10. The apparatus for high temperature production of cable conductor monofilaments according to claim 1, wherein the heating temperature of the wire heater is preferably 450-550 ℃.