CN-122021136-A - Assessment method and device for extrusion quality of cable sheath and electronic equipment

CN122021136ACN 122021136 ACN122021136 ACN 122021136ACN-122021136-A

Abstract

The invention belongs to the technical field of cable production, and discloses a cable sheath extrusion quality evaluation method, a device and electronic equipment. The method comprises the steps of obtaining actual geometric parameters of a runner homogenizing section of a cable sheath extrusion system, basic physical parameters and viscosity curves of sheath materials, establishing a target three-dimensional model of the runner homogenizing section according to the actual geometric parameters, endowing the target three-dimensional model with initial simulation technological parameters, the basic physical parameters and the viscosity curves, carrying out simulation analysis on the extrusion process of the cable sheath, obtaining simulation extrusion states of a runner outlet section, judging whether the simulation technological parameters are qualified according to simulation temperature distribution, simulation pressure distribution and preset uniformity thresholds which are respectively corresponding to the simulation temperature distribution, and outputting the simulation technological parameters as the target simulation technological parameters if the initial simulation technological parameters are qualified. The quality of the cable sheath during extrusion is evaluated, the production efficiency is improved, and the performance of the cable is ensured.

Inventors

ZHU LINGZHI
Jing Lihan
LU JIANGUANG
HE JIAXUN
CHEN WANLU
ZHANG ZHAOBIN
MA JIATENG
XU FAN
YANG HAIYAN
RUAN KANGJIE

Assignees

重庆泰山电缆有限公司

Dates

Publication Date: 20260512
Application Date: 20260114

Claims (8)

1. The method for evaluating the extrusion quality of the cable sheath is characterized by comprising the following steps of: s1, acquiring actual geometric parameters of a runner homogenizing section of a cable sheath extrusion system, and basic physical parameters and viscosity curves of sheath materials; s2, establishing a target three-dimensional model of the flow channel homogenization section according to the actual geometric parameters, wherein the target three-dimensional model comprises a screw, a machine barrel, an extruder head and a filter plate; S3, giving initial simulation process parameters, the basic physical parameters and the viscosity curve to the target three-dimensional model, performing simulation analysis on the extrusion process of the cable sheath, and obtaining a simulation extrusion state of the outlet section of the runner, wherein the initial simulation process parameters comprise screw temperature, screw rotating speed and inlet temperature, and the simulation extrusion state comprises simulation temperature distribution and simulation pressure distribution; s4, judging whether the simulation process parameters are qualified or not according to the simulation temperature distribution, the simulation pressure distribution and the respectively corresponding preset uniformity threshold values; And S5, judging that the initial simulation process parameters are qualified if the simulation pressure distribution and the simulation temperature distribution meet the corresponding uniformity threshold values, and outputting the initial simulation process parameters as target simulation process parameters, otherwise, adjusting the initial simulation process parameters according to the simulation extrusion state, and returning to S3 for re-simulation until the qualified target simulation process parameters are output.
2. The method of claim 1, further comprising, prior to deriving the target three-dimensional model: Defining resistance characteristics for the filter plate, and obtaining the filter plate for simulation calculation, wherein the resistance characteristics are characterized by viscous resistance coefficients and inertial resistance coefficients; The viscous drag coefficient is calculated based on the pressure drop of the sheath material passing through the filter plate, the pressure drop is obtained by simulating calculation of the sheath material passing through the filter plate, and the calculation expression of the pressure drop is as follows: Wherein su is the pressure drop, mu is the viscosity parameter of the sheath material, k is the permeability for reflecting the viscous drag coefficient, ρ is the density of the sheath material, β is the inertial drag coefficient, and v is the apparent flow rate of the sheath material; The permeability is calculated based on the porosity of the filter plate, and the porosity is expressed as follows: wherein V 1 is the total volume of voids of the filter plate and V is the total volume of the filter plate for the porosity.
3. The method of claim 2, wherein the inertial resistance coefficient β is 0 under laminar flow conditions.
4. The method according to claim 2, wherein the uniformity threshold in step S5 comprises a preset temperature margin and a preset pressure margin; And when the temperature range of the simulation temperature distribution is smaller than the preset temperature range and the pressure range of the simulation pressure distribution is smaller than the preset pressure range, judging that the simulation process parameters are qualified.
5. The method according to claim 1, further comprising, after step S5: receiving a user feedback signal, wherein the feedback signal comprises an actual extrusion state obtained by performing an actual production test based on the target simulation process parameter, and the actual extrusion state comprises an actual temperature distribution and an actual pressure distribution of an outlet section of an extrusion system; Judging whether the actual temperature distribution and the actual pressure distribution are matched with the corresponding simulation temperature distribution and simulation pressure distribution or not; And if the simulation model parameters are not matched, modifying the simulation model parameters based on the feedback signals and the preset rules to obtain a new simulation model, and returning to the step S3.
6. An evaluation device of extrusion quality of a cable sheath, characterized by comprising: The acquisition module is configured to acquire the actual geometric parameters of the flow channel homogenization section of the cable sheath extrusion system, and the basic physical parameters and the viscosity curve of the sheath material; A modeling module configured to establish a target three-dimensional model of the flow channel homogenization section according to the actual geometric parameters, the target three-dimensional model including a screw, a barrel, an extruder head, and a filter plate; The simulation module is configured to endow the target three-dimensional model with initial simulation process parameters, the basic physical parameters and the viscosity curve, perform simulation analysis on the extrusion process of the cable sheath, and acquire a simulation extrusion state of the outlet section of the flow channel, wherein the initial simulation process parameters comprise screw temperature, screw rotating speed and inlet temperature, and the simulation extrusion state comprises simulation temperature distribution and simulation pressure distribution; The judging module is configured to judge whether the simulation process parameters are qualified or not according to the simulation temperature distribution, the simulation pressure distribution and the respectively corresponding preset uniformity threshold values; And the output module is configured to judge the initial simulation process parameter to be qualified if the simulation pressure distribution and the simulation temperature distribution meet the corresponding uniformity threshold, output the initial simulation process parameter as a target simulation process parameter, otherwise, adjust the initial simulation process parameter according to the simulation extrusion state, and return to the simulation module to perform re-simulation until the qualified target simulation process parameter is output.
7. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 5 when the computer program is executed.
8. A storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 5.

Description

Assessment method and device for extrusion quality of cable sheath and electronic equipment Technical Field The invention relates to the technical field of cable manufacturing, in particular to a method and a device for evaluating extrusion quality of a cable sheath and electronic equipment. Background The power cable circuit is used as an important component of the urban power grid, plays an important role in the safe operation of the urban power grid, and is equivalent to the connection of blood vessels in the power grid to generate electricity, transmit power and use electric equipment. The production and laying quality of the cable plays a key role in smoothly putting the power grid engineering into operation, and once the cable is abnormal and cannot normally operate, the cable directly brings losses to people, society and countries. Along with the continuous increase of the urban process on the electricity demand, the cable is visually important for the high-quality development of the electric power energy source in China, and has great significance for the implementation of the energy strategy in China. The performance of the sheath of the cable is critical to the performance influence of the cable, the rheological behavior of the material in the extrusion molding process under the action of high temperature and shearing is determined by the sheath material parameters, meanwhile, extrusion temperature and pressure, extrusion rate, yield, dimensional stability of molding and the like are influenced, and further, the insulation performance of the high-voltage cable is determined, the molding of fluid extrusion is also influenced by different process parameters, however, in actual production, technicians need to repeatedly adjust extrusion processes such as temperature, rotating speed and the like to adapt to insulation materials with different brands, and a great deal of time and effort are generally consumed, and a good cable extrusion effect is still not obtained. Those skilled in the art are therefore working to develop a method for assessing extrusion quality in the production of cable jackets. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a method and apparatus for evaluating extrusion quality of a cable sheath, and an electronic device. The invention provides an evaluation method of extrusion quality of a cable sheath, which comprises the steps of S1, obtaining actual geometric parameters of a runner homogenization section of a cable sheath extrusion system, basic physical parameters and viscosity curves of sheath materials, S2, establishing a target three-dimensional model of the runner homogenization section according to the actual geometric parameters, wherein the target three-dimensional model comprises a screw, a machine barrel, an extruder head and a filter plate, S3, endowing the target three-dimensional model with initial simulation process parameters, the basic physical parameters and the viscosity curves, performing simulation analysis on the extrusion process of the cable sheath, obtaining a simulation extrusion state of an outlet section of the runner, wherein the initial simulation process parameters comprise screw temperature, screw rotating speed and inlet temperature, the simulation extrusion state comprises simulation temperature distribution and simulation pressure distribution, S4, judging whether the simulation process parameters are qualified according to the simulation temperature distribution and the simulation pressure distribution and respectively corresponding preset uniformity thresholds, S5, judging whether the initial simulation process parameters are qualified or not according to the simulation pressure distribution and the simulation temperature distribution meet the corresponding uniformity thresholds, outputting the initial simulation process parameters as the target simulation process parameters, otherwise, adjusting the initial simulation process parameters according to the simulation extrusion state, and returning the initial simulation process parameters to the simulation state until the simulation process parameters are qualified. Preferably, before the target three-dimensional model is obtained, the method further comprises the steps of defining resistance characteristics for the filter plate to obtain the filter plate for simulation calculation, wherein the resistance characteristics are represented by viscous resistance coefficients and inertia resistance coefficients, the viscous resistance coefficients are obtained by calculation based on pressure drop when the sheath material passes through the filter plate, the pressure drop is obtained by simulation calculation of the sheath material passing through the filter plate, and the pressure drop is calculated by the calculation expression: where su is the pressure drop, μ is the viscosity parameter of the sheath material, k is the perme