阅读说明：本技术 化纤单丝拉伸张力在线控制系统及控制方法 (Chemical fiber monofilament stretching tension on-line control system and control method ) 是由 华旻烨 李建良 丁天 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种化纤单丝拉伸张力在线控制系统及控制方法,涉及化学纤维新技术领域,本发明提供的化纤单丝拉伸张力在线控制系统及在线控制方法,能够通过监控第一拉伸热辊和第二拉伸热辊间的张力变化,以及第二拉伸热辊与拉伸热板间的张力变化,对熔纺单丝拉伸过程中的拉伸倍率、分级拉伸倍率等的拉伸工艺可靠性进行实时监控,有利于保障成品单丝卷绕成型的性状稳定性和结构性能,降低了拉伸成品单丝的废品率,对最终成型的产品质量起着预警和实时在线控制的作用。(The invention discloses an on-line control system and a control method for chemical fiber monofilament stretching tension, which relate to the new technical field of chemical fibers.)

1. The on-line control system for the stretching tension of the chemical fiber monofilaments is characterized by comprising a first stretching hot roller, a second stretching hot roller and a stretching hot plate which are sequentially arranged according to the stretching sequence of the melt-spun chemical fiber monofilaments; a first tension measuring point for the monofilaments to pass through on line is arranged between the first stretching hot roller and the second stretching hot roller; a second tension measuring point for the monofilaments to pass through on line is arranged between the second stretching hot roller and the stretching hot plate; the first tension measuring point is provided with a first tension sensor for measuring the tension of the melt-spun chemical fiber monofilaments; a second tension sensor for measuring the tension of the melt-spun chemical fiber monofilaments is arranged on the second tension measuring point; the first tension sensor and the second tension sensor are in communication connection with an upper computer visual monitoring platform, and the upper computer visual monitoring platform is used for displaying and storing tension data measured by the first tension sensor and the second tension sensor in real time on line.

2. The on-line control system for chemical fiber monofilament stretching tension of claim 1, wherein the first stretching thermo roll is provided with a first temperature sensor and a first speed sensor; the second stretching hot roller is provided with a second temperature sensor and a second speed sensor; the first temperature sensor, the first speed sensor, the second temperature sensor and the second speed sensor are respectively in communication connection with the upper computer visual monitoring platform; the upper computer visual monitoring platform is further used for displaying and storing real-time temperature parameters and speed parameters of the first stretching hot roller and the second stretching hot roller on line.

3. The on-line control system for chemical fiber monofilament stretching tension of claim 2, further comprising a first stretching hot roller temperature adjusting module, a first stretching hot roller speed adjusting module, a second stretching hot roller temperature adjusting module, a second stretching hot roller speed adjusting module; the first stretching hot roller temperature adjusting module and the first stretching hot roller speed adjusting module are respectively in communication connection with the upper computer visual monitoring platform and are electrically connected with the first stretching hot roller; the second stretching hot roller temperature adjusting module and the second stretching hot roller speed adjusting module are respectively in communication connection with the upper computer visual monitoring platform and are electrically connected with the second stretching hot roller; the upper computer visual monitoring platform is further used for remotely adjusting the temperature and speed parameters of the first stretching hot roller and the second stretching hot roller on line through an interface.

4. The on-line control system for the stretching tension of chemical fiber monofilaments as claimed in claim 1, wherein the bobbin diameter of the first stretching hot roller and the bobbin diameter of the second stretching hot roller are 12-15 cm, and the winding forming angle is less than or equal to 30 °.

5. The on-line control system for chemical fiber monofilament stretching tension of claim 3, wherein a plurality of the first temperature sensors are uniformly arranged on the first stretching hot roller, and a corresponding first heater for heating the first stretching hot roller is arranged at the position of each first temperature sensor; the plurality of first heaters are uniformly distributed along the first stretching hot roller and are electrically connected with the first stretching hot roller temperature adjusting module; a plurality of second temperature sensors are uniformly arranged on the second stretching hot roller, and a corresponding second heater for heating the second stretching hot roller is arranged at the position of each second temperature sensor; the plurality of second heaters are uniformly distributed along the second stretching hot roller and are electrically connected with the second stretching hot roller temperature adjusting module.

6. The on-line control system for the tensile force of the chemical fiber monofilaments as claimed in any one of claims 1 to 5, wherein the tensile hot plate is embedded in a tensile shell; the inner wall of the stretching shell is provided with a heat insulation layer; the stretching shell is provided with an opening pipe which is used for being hermetically communicated with an external hot air pipeline; an electromagnetic flow valve is arranged on the open pipe; a third temperature sensor is arranged on the stretching shell, and a temperature sensing probe of the third temperature sensor is positioned in the stretching shell; the third temperature sensor is in communication connection with the upper computer visual monitoring platform, and the upper computer visual monitoring platform displays and stores real-time temperature parameters of the third temperature sensor on line; the electromagnetic flow valve is in communication connection with the upper computer visual monitoring platform through a hot air flow adjusting module.

7. An on-line control method for the tensile force of chemical fiber monofilaments is characterized by comprising the following steps:

the first stretching hot roller stretches the melt-spun chemical fiber monofilaments, the temperature control range is 65-90 ℃, the speed control range is 300-800 m/min, and the first stretching hot roller transmits real-time temperature and speed parameters to an upper computer visual monitoring platform;

the melt-spun chemical fiber monofilaments pass through a first tension measuring point, and a first tension sensor collects tension data in real time and transmits the tension data to an upper computer visual monitoring platform;

the second stretching hot roller stretches the melt-spun chemical fiber monofilaments, the temperature control range is 80-150 ℃, the speed control range is 300-800 m/min, and the second stretching hot roller transmits real-time temperature and speed parameters to an upper computer visual monitoring platform;

the melt-spun chemical fiber monofilaments pass through a second tension measuring point, and a second tension sensor collects tension data in real time and transmits the tension data to an upper computer visual monitoring platform;

stretching and shaping the melt-spun chemical fiber monofilaments by a stretching hot plate, wherein the temperature control range is 150-185 ℃;

the visual monitoring platform of the upper computer displays and stores the received first stretching hot roller temperature parameter, first stretching hot roller speed parameter, first tension measuring point tension data, second stretching hot roller temperature parameter, second stretching hot roller speed parameter and second tension measuring point tension data in real time.

8. The method of claim 7, further comprising:

tension data control critical values of a first tension measuring point and a second tension measuring point are preset in the upper computer visual monitoring platform;

when the collected real-time tension data exceed a preset tension data control critical value, the upper computer visual monitoring platform controls the first stretching hot roller temperature adjusting module and/or the second stretching hot roller temperature and/or the first stretching hot roller speed adjusting module and/or the second stretching hot roller speed adjusting module to execute control feedback until the real-time tension data accord with a preset tension data control range;

and in the parameter regulation and control process of the visual monitoring platform of the upper computer, the parameters of the first temperature sensor, the parameters of the first speed sensor, the parameters of the second temperature sensor and the parameters of the second speed sensor which accord with the control range of the tension data are stored in a database in real time.

Technical Field

The invention belongs to the new technical field of chemical fibers, and particularly relates to an on-line control system and a control method for the tensile tension of chemical fiber monofilaments.

Background

Chemical fiber products are continuously developed at present, and various superfine denier fibers, high-strength high-modulus fibers, functional fibers and intelligent fiber products appear, so that the chemical fiber products are widely applied to various application occasions.

During the spinning process of chemical fiber monofilaments, yarn breakage often occurs during the winding process of finished monofilaments or the phenomenon of uneven aperture among the monofilaments in the screen often occurs, which are usually caused by poor or uneven tension control during the stretching process of the chemical fiber monofilaments. If real-time tension detection and process control are not carried out, breakage of chemical fiber monofilaments or uneven pore diameters among the monofilaments frequently occurs in the spinning production process due to raw materials, processes, equipment, temperature and humidity parameters and the like, so that the production quality, cost and consumption of chemical fiber finished products are finally influenced, and the economic benefit of producers is not facilitated.

Disclosure of Invention

Aiming at the problems, the invention provides an on-line control system and a control method for the stretching tension of chemical fiber monofilaments, which are used for monitoring and controlling the tension of melt-spun monofilaments in the stretching process and giving timely early warning.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention provides an on-line control system for chemical fiber monofilament stretching tension, which comprises a first stretching hot roller, a second stretching hot roller and a stretching hot plate which are sequentially arranged according to the stretching sequence of melt spinning chemical fiber monofilaments; a first tension measuring point for the monofilaments to pass through on line is arranged between the first stretching hot roller and the second stretching hot roller; a second tension measuring point for the monofilaments to pass through on line is arranged between the second stretching hot roller and the stretching hot plate; the first tension measuring point is provided with a first tension sensor for measuring the tension of the melt-spun chemical fiber monofilaments; a second tension sensor for measuring the tension of the melt-spun chemical fiber monofilaments is arranged on the second tension measuring point; the first tension sensor and the second tension sensor are in communication connection with an upper computer visual monitoring platform, and the upper computer visual monitoring platform is used for displaying and storing tension data measured by the first tension sensor and the second tension sensor in real time on line.

According to the on-line control system for the chemical fiber monofilament stretching tension, preferably, a first temperature sensor and a first speed sensor are arranged on the first stretching hot roller; the second stretching hot roller is provided with a second temperature sensor and a second speed sensor; the first temperature sensor, the first speed sensor, the second temperature sensor and the second speed sensor are respectively in communication connection with the upper computer visual monitoring platform; the upper computer visual monitoring platform is further used for displaying and storing real-time temperature parameters and speed parameters of the first stretching hot roller and the second stretching hot roller on line.

The on-line control system for the chemical fiber monofilament stretching tension provided by the invention preferably further comprises a first stretching hot roller temperature adjusting module, a first stretching hot roller speed adjusting module, a second stretching hot roller temperature adjusting module and a second stretching hot roller speed adjusting module; the first stretching hot roller temperature adjusting module and the first stretching hot roller speed adjusting module are respectively in communication connection with the upper computer visual monitoring platform and are electrically connected with the first stretching hot roller; the second stretching hot roller temperature adjusting module and the second stretching hot roller speed adjusting module are respectively in communication connection with the upper computer visual monitoring platform and are electrically connected with the second stretching hot roller; the upper computer visual monitoring platform is further used for remotely adjusting the temperature and speed parameters of the first stretching hot roller and the second stretching hot roller on line through an interface.

According to the on-line control system for the stretching tension of the chemical fiber monofilaments, the diameters of the bobbins of the first stretching hot roller and the second stretching hot roller are preferably 12-15 cm, and the winding forming angle is less than or equal to 30 degrees.

In the on-line control system for the chemical fiber monofilament stretching tension, preferably, a plurality of first temperature sensors are uniformly arranged on the first stretching hot roller, and a corresponding first heater for heating the first stretching hot roller is arranged at the position of each first temperature sensor; the plurality of first heaters are uniformly distributed along the first stretching hot roller and are electrically connected with the first stretching hot roller temperature adjusting module; a plurality of second temperature sensors are uniformly arranged on the second stretching hot roller, and a corresponding second heater for heating the second stretching hot roller is arranged at the position of each second temperature sensor; the plurality of second heaters are uniformly distributed along the second stretching hot roller and are electrically connected with the second stretching hot roller temperature adjusting module.

According to the on-line control system for the chemical fiber monofilament stretching tension, preferably, the stretching hot plate is embedded in a stretching shell; the inner wall of the stretching shell is provided with a heat insulation layer; the stretching shell is provided with an opening pipe which is used for being hermetically communicated with an external hot air pipeline; an electromagnetic flow valve is arranged on the open pipe; a third temperature sensor is arranged on the stretching shell, and a temperature sensing probe of the third temperature sensor is positioned in the stretching shell; the third temperature sensor is in communication connection with the upper computer visual monitoring platform, and the upper computer visual monitoring platform displays and stores real-time temperature parameters of the third temperature sensor on line; the electromagnetic flow valve is in communication connection with the upper computer visual monitoring platform through a hot air flow adjusting module.

Based on the chemical fiber monofilament tensile force on-line control system provided by the invention, the invention also provides a chemical fiber monofilament tensile force on-line control method, which comprises the following steps:

the first stretching hot roller stretches the melt-spun chemical fiber monofilaments, the temperature control range is 65-90 ℃, the speed control range is 300-800 m/min, and the first stretching hot roller transmits real-time temperature and speed parameters to an upper computer visual monitoring platform;

the melt-spun chemical fiber monofilaments pass through a first tension measuring point, and a first tension sensor collects tension data in real time and transmits the tension data to an upper computer visual monitoring platform;

the second stretching hot roller stretches the melt-spun chemical fiber monofilaments, the temperature control range is 80-150 ℃, the speed control range is 300-800 m/min, and the second stretching hot roller transmits real-time temperature and speed parameters to an upper computer visual monitoring platform;

the melt-spun chemical fiber monofilaments pass through a second tension measuring point, and a second tension sensor collects tension data in real time and transmits the tension data to an upper computer visual monitoring platform;

stretching and shaping the melt-spun chemical fiber monofilaments by a stretching hot plate, wherein the temperature control range is 150-185 ℃;

the visual monitoring platform of the upper computer displays and stores the received first stretching hot roller temperature parameter, first stretching hot roller speed parameter, first tension measuring point tension data, second stretching hot roller temperature parameter, second stretching hot roller speed parameter and second tension measuring point tension data in real time.

The method for controlling the tensile force of the chemical fiber monofilament on line preferably further comprises the following steps:

tension data control critical values of a first tension measuring point and a second tension measuring point are preset in the upper computer visual monitoring platform;

when the collected real-time tension data exceed a preset tension data control critical value, the upper computer visual monitoring platform controls the first stretching hot roller temperature adjusting module and/or the second stretching hot roller temperature and/or the first stretching hot roller speed adjusting module and/or the second stretching hot roller speed adjusting module to execute control feedback until the real-time tension data accord with a preset tension data control range;

and in the parameter regulation and control process of the visual monitoring platform of the upper computer, the parameters of the first temperature sensor, the parameters of the first speed sensor, the parameters of the second temperature sensor and the parameters of the second speed sensor which accord with the control range of the tension data are stored in a database in real time.

The technical scheme has the following advantages or beneficial effects:

the chemical fiber monofilament stretching tension on-line control system and the chemical fiber monofilament stretching tension on-line control method provided by the invention can monitor the tension change between the first stretching hot roller and the second stretching hot roller and the tension change between the second stretching hot roller and the stretching hot roller, and can monitor the stretching process reliability such as stretching multiplying power, grading stretching multiplying power and the like in the melt spinning monofilament stretching process in real time, thereby being beneficial to ensuring the property stability and structural performance of finished monofilament winding and forming, reducing the rejection rate of stretched finished monofilament and playing the roles of early warning and real-time on-line control on the quality of the finally formed product.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic structural diagram of an on-line control system for chemical fiber monofilament tension provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural wire frame diagram of an on-line control system for chemical fiber monofilament tension provided in embodiment 1 of the present invention;

FIG. 3 is a schematic flow chart of an on-line control method for the tensile force of chemical fiber monofilaments according to embodiment 1 of the present invention;

fig. 4 is a schematic flow chart of another method for controlling the tension of chemical fiber monofilament in-line according to embodiment 1 of the present invention.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.