WO2021008445A1 - 一种fdy网络异常的快速检测判断方法 - Google Patents

一种fdy网络异常的快速检测判断方法 Download PDF

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WO2021008445A1
WO2021008445A1 PCT/CN2020/101235 CN2020101235W WO2021008445A1 WO 2021008445 A1 WO2021008445 A1 WO 2021008445A1 CN 2020101235 W CN2020101235 W CN 2020101235W WO 2021008445 A1 WO2021008445 A1 WO 2021008445A1
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network
tow
pressure value
production
fiber
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PCT/CN2020/101235
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English (en)
French (fr)
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张凤才
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江苏港虹纤维有限公司
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Publication of WO2021008445A1 publication Critical patent/WO2021008445A1/zh

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/20—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to excessive tension or irregular operation of apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams

Definitions

  • the invention belongs to the technical field of chemical fiber production, and specifically relates to a fast detection and judgment method of FDY network abnormality.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved fast detection and judgment method for FDY network abnormality.
  • the invention also provides a full-drawing production method of chemical fiber.
  • a method for detecting and judging network abnormalities in the production of fully drawn yarns includes the following steps: under the action of airflow, multiple filaments passing through the first guide wire device are formed in a network nozzle A network tow with multiple network nodes, and then the network tow is processed after passing through a second guide wire device.
  • the detection and judgment method includes the following steps: in the production of full-drawn yarns, obtaining the The actual pressure value after the air flow passes through the network nozzles, the actual pressure value is compared with the pressure threshold or the initial pressure value of the air flow; when the actual pressure value is less than or equal to the pressure threshold or when the actual pressure When the absolute value of the difference between the pressure value and the initial pressure value of the air flow exceeds a set threshold, it is determined that the network tow has a network abnormality.
  • the "actual pressure value” may be the pressure value obtained by real-time online monitoring at all time nodes, or may be a pressure value obtained at a specific time point (which may be a fixed time point or an irregular time node).
  • multiple filaments form a network tow with multiple network nodes in the network nozzle.
  • the principle is that the airflow forms a bended airflow in the network nozzle so that each monofilament will interact with each other.
  • the entanglement forms a network node, which is a conventional solution in the prior art, and will not be detailed here.
  • the pressure threshold is obtained in the following manner: when it is determined through a reverse contrast test that the network tow has a network abnormality, the airflow reaches the first guide after passing through the network nozzle
  • the test pressure value of the wire device or the second guide wire device is the pressure threshold.
  • the reverse comparison test includes the following steps:
  • the quality inspection of the to-be-inspected network tow obtained in step (i) is carried out in sequence, and the quality inspection includes the detection of the number of network nodes of the to-be-inspected network tow, and when the to-be-inspected network tow is detected for the first time
  • the number of network nodes of the inspected network tow is less than the predetermined value, it is determined that the network to be inspected has a network abnormality.
  • the test pressure value corresponding to the to be inspected network tow that has the network abnormality is the value.
  • the pressure threshold is the pressure threshold.
  • the predetermined value is 10-20.
  • step (ii) the quality inspection is performed by a water bath method, and the water bath method includes the following steps: immersing the network tow to be tested in water, dispersing, and counting the network to be tested The number of network nodes the tow has.
  • the first guide wire device is provided with a pressure to be detected position, and the test pressure value and/or the actual pressure value is obtained by detecting the pressure at the pressure to be detected position.
  • the first guide wire device is a U-shaped guide wire porcelain piece
  • the fiber thread passes through the opening of the U-shaped guide wire porcelain piece
  • the pressure to be detected is It is arranged at the opening of the U-shaped guide wire porcelain piece.
  • the second guide wire device is also a U-shaped guide wire porcelain piece.
  • the actual pressure value and/or the test pressure value are detected by a pressure detector
  • the pressure detector includes a wind pressure gauge, and one end is connected to the wind pressure gauge , The other end of the measuring pipeline communicated with the opening of the U-shaped guide wire porcelain piece.
  • the air inlet at the other end of the measurement pipeline is made to face the flow direction of the airflow out of the network nozzle.
  • the detection and judgment method further includes the steps of making the wind pressure gauge and the control system communicatively connected and the control system and the alarm communicatively connected, and the control system is pre-installed Enter the program to make all the actual pressure values acquired by the wind pressure gauge and the pressure threshold value real-time and full online comparison, when the comparison shows that the actual pressure value is less than or equal to the pressure threshold value, send an instruction to the The alarm sounds an alarm.
  • the actual pressure value is manually and actively used by a pressure detector to periodically detect, that is, the air inlet of the measurement pipeline is directly facing the pressure to be detected position, because the pressure is to be detected
  • the detection position is set at the opening of the U-shaped guide wire ceramic piece, that is, the air inlet can be realized that the air inlet is directly facing the flow direction of the airflow out of the network nozzle, which ensures the accuracy of the detection result without affecting To fiber silk.
  • the present invention also provides another technical solution: a full-drawn production method of chemical fiber, the production method includes a step of judging the abnormality of the network tow in the production of full-drawn yarn, and the judgment step includes the above-mentioned detection Judgment method.
  • the filaments may be selected from polyethylene terephthalate fibers, polylactic acid fibers, polycaprolactone fibers, regenerated PET fibers, polybutylene succinate fibers, 3- Copolymer fiber of hydroxybutyrate and 3-hydroxyvalerate, polybutylene terephthalate fiber, polyethylene fiber, polypropylene fiber, polystyrene fiber, polyamide fiber, PTT fiber ( A combination of one or more of poly(1.3 propylene terephthalate fiber), polyvinyl chloride fiber and polyurethane fiber.
  • the present invention has the following advantages compared with the prior art:
  • the method for detecting and judging network abnormalities in the production of full drawn yarns of the present invention finds the relationship between pressure changes at specific locations, and then innovatively uses pressure changes and the degree of pressure changes to determine whether the network is abnormal.
  • it can be efficient and Effectively find out the abnormal situation of the network, avoid the naked observation and lagging sample detection in the prior art to determine whether the network is abnormal (inaccurate, unstable and efficient), so as to adjust the production status in time and find the corresponding time period Poor internal quality network tow (reject it to avoid subsequent processing quality problems, etc.), on the other hand, it can also save manpower and material resources, and ensure the stable quality of the products out of the warehouse.
  • Figure 1 is a schematic diagram of the structure of the equipment for forming a network tow in the production of fully drawn yarns of the present invention
  • Figure 2 is a schematic diagram of the equipment for forming a network tow with part of the structure hidden;
  • Figure 3 is a schematic diagram of the relationship between airflow and fiber filaments.
  • the inventors of the present invention have discovered during long-term practice that the pressure when the airflow that makes the fiber filaments clump to form a network node passes through the network nozzle and reaches the guide wire device is closely related to the initial pressure value of the airflow, and has the characteristics of year-on-year change.
  • the pressure value when the airflow reaches the guide wire device after passing through the network nozzle will also change, and the inventor proposes that the network tow can be effectively estimated by the pressure change and the degree of the pressure change.
  • the accuracy rate is as high as 99% or more; specifically, in the production of full drawn yarn, the actual pressure value after the airflow passes through the network nozzle is obtained, and the actual pressure value and the pressure threshold value or The initial pressure value of the air flow is compared; when the actual pressure value is less than or equal to the pressure threshold or when the absolute value of the difference between the actual pressure value and the initial pressure value of the air flow exceeds a set threshold, it is determined
  • the network tow has a network abnormality.
  • the pressure threshold is obtained by the following method: when it is determined by a reverse contrast test that the network tow has a network abnormality, the airflow reaches the first guide wire device or the second guide wire device after passing through the network nozzle The test pressure value at time is the pressure threshold; wherein, the reverse contrast test includes the following steps:
  • the quality inspection of the to-be-inspected network tow obtained in step (i) is carried out in sequence, and the quality inspection includes the detection of the number of network nodes of the to-be-inspected network tow, and when the to-be-inspected network tow is detected for the first time
  • the number of network nodes of the inspected network tow is less than the predetermined value, it is determined that the network to be inspected has a network abnormality.
  • the test pressure value corresponding to the to be inspected network tow that has the network abnormality is the value.
  • the pressure threshold is the pressure threshold.
  • the predetermined value is 10-20.
  • step (ii) the quality inspection is performed by a water bath method, and the water bath method includes the following steps: immersing the network tow to be tested in water, dispersing, and counting the network tows of the network to be tested. Number of nodes.
  • the first guide wire device is provided with a pressure to be detected position, and the test pressure value and/or the actual pressure value is obtained by detecting the pressure at the pressure to be detected position.
  • the first guide wire device is a U-shaped guide wire porcelain piece
  • the fiber thread passes through the opening of the U-shaped guide wire porcelain piece
  • the pressure to-be-detected position is set at The opening of the U-shaped guide wire porcelain piece.
  • the actual pressure value and/or the test pressure value are detected by a pressure detector.
  • the pressure detector includes a wind pressure gauge, and one end is connected to the wind pressure gauge. One end of the measuring pipeline communicates with the opening of the U-shaped guide wire porcelain piece.
  • the air inlet at the other end of the measuring pipeline is made to face the flow direction of the airflow out of the network nozzle.
  • the present invention also provides another technical solution: a full-drawn production method of chemical fiber, the production method includes a step of judging the abnormality of the network tow in the production of full-drawn yarn, and the judgment step includes the above-mentioned detection Judgment method.
  • the fiber thread passes through the first guide wire device 1 (preferably a U-shaped guide wire device) and then passes through the network nozzle 2 and then passes through the network nozzle 2.
  • first guide wire device 1 preferably a U-shaped guide wire device
  • a network tow with multiple network nodes is formed (as shown in Figure 2-3, the airflow enters from the air hole 7, and the direction of the airflow acts on the fiber filaments perpendicularly, and then a folded airflow is formed in the network nozzle 2 so that multiple fibers
  • the filaments clump together to form a network tow with network nodes), and then enter the subsequent work section after being oriented by the second guide wire device 3; wherein the support 4 is used to support the setting of the above-mentioned components; see Figure 1 again, where the measurement pipeline 5
  • the air inlet is set at the opening of the first guide wire device 1 and is set directly opposite, and the air flow here is introduced into the wind pressure gauge 6 for pressure measurement and then the actual pressure value is obtained.
  • the measurement at the first guide wire device 1 can also avoid affecting the fiber filaments. Avoid contact and cause breakage and will not affect its formation.
  • This example provides a method for detecting and judging network abnormalities in the production of fully drawn yarns of semi-dull polyethylene terephthalate fibers (semi-dull PET fibers).
  • the multiple fiber filaments passing through the first guide wire device are formed into a network filament bundle with multiple network nodes in the network nozzle, and then the network filament The bundle is processed after passing through the second guide wire device, and the detection and judgment method includes the following steps;
  • the quality inspection of the to-be-inspected network tow obtained in step (i) is carried out in sequence, and the quality inspection includes the detection of the number of network nodes of the to-be-inspected network tow, and when the to-be-inspected network tow is detected for the first time
  • the inspection network tow has less than 12 network nodes, it is determined that the network tow to be inspected has a network abnormality.
  • the test pressure value corresponding to the to be inspected network tow that has the network abnormality is the test pressure value.
  • the pressure threshold
  • the pressure threshold of stability control obtained by the network is 100Pa through experiments.
  • the on-site technical workers use a pressure detector to perform regular detection.
  • the specific detection operation is: the air inlet of the measuring pipeline is directly facing the pressure to be detected position, because the pressure is to be detected. It is set at the opening of the first guide wire device (ie U-shaped guide wire porcelain piece), that is, it can realize that the air inlet is directly facing the flow direction of the air flow out of the network nozzle.
  • the obtained data is as follows:
  • the operator When the measured actual pressure value is less than or equal to the pressure threshold, the operator is notified to check it on site, and at the same time, take multiple samples to detect the network node number of the network tow by the water bath method to determine the working status of the network nozzle (whether there is blockage or side If it occurs, it must be cleaned online or shut down for maintenance or replaced with spare network nozzles, which can avoid the production of more defective products.
  • This example provides a method for detecting and judging network abnormalities in the production of nylon 6 full drawn yarn.
  • the passing through A plurality of fiber filaments of a guide wire device form a network tow with a plurality of network nodes in the network nozzle, and then the network tow is processed through a second guide wire device.
  • the detection and judgment method includes The following steps;
  • the quality inspection of the to-be-inspected network tow obtained in step (i) is carried out in sequence, and the quality inspection includes the detection of the number of network nodes of the to-be-inspected network tow, and when the to-be-inspected network tow is detected for the first time
  • the number of network nodes of the inspected network tow is less than 14, it is determined that the network tow to be inspected has a network abnormality.
  • the test pressure value corresponding to the to be inspected network tow that has a network abnormality is the test pressure value.
  • the pressure threshold
  • the pressure threshold obtained through experiments is 150Pa.
  • the on-site technical workers use a pressure detector to perform regular detection.
  • the specific detection operation is: the air inlet of the measuring pipeline is directly facing the pressure to be detected position, because the pressure is to be detected.
  • the first guide wire device ie, U-shaped guide wire porcelain piece
  • the operator When the measured actual pressure value is less than or equal to the pressure threshold, the operator is notified to check it on site, and at the same time, take multiple samples to detect the network node number of the network tow by the water bath method to determine the working status of the network nozzle (whether there is blockage or side If it occurs, it must be cleaned online or shut down for maintenance or replaced with spare network nozzles, which can avoid the production of more defective products.
  • This example provides a method for detecting and judging network abnormalities in the production of fully drawn yarn of poly(1.3) propylene terephthalate fiber (PTT fiber).
  • PTT fiber poly(1.3) propylene terephthalate fiber
  • the detection and judgment method includes the following steps;
  • the quality inspection of the to-be-inspected network tow obtained in step (i) is carried out in sequence, and the quality inspection includes the detection of the number of network nodes of the to-be-inspected network tow, and when the to-be-inspected network tow is detected for the first time
  • the inspection network tow has less than 12 network nodes, it is determined that the network tow to be inspected has a network abnormality.
  • the test pressure value corresponding to the to be inspected network tow that has the network abnormality is the test pressure value.
  • the pressure threshold
  • the pressure threshold obtained through experiments is 150.
  • the operator When the measured actual pressure value is less than or equal to the pressure threshold, the operator is notified to check it on site, and at the same time, take multiple samples to detect the network node number of the network tow by the water bath method to determine the working status of the network nozzle (whether there is blockage or side If it occurs, it must be cleaned online or shut down for maintenance or replaced with spare network nozzles, which can avoid the production of more defective products.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

一种全拉伸丝生产中网络异常的检测判断方法，全拉伸丝生产包括如下步骤：在气流的作用下，使穿过第一导丝器件（1）的多根纤维丝在网络喷嘴（2）中形成具有多个网络结点的网络丝束，然后使得网络丝束经过第二导丝器件（3）后进行加工处理，检测判断方法包括如下步骤：在全拉伸丝生产中，获取气流穿过网络喷嘴（2）后的实际压力值，将实际压力值与压力阈值或气流的初始压力值进行对比；当实际压力值小于等于压力阈值或当实际压力值与气流的初始压力值的差值的绝对值超过设定阈值时，判定网络丝束出现网络异常；该检测判断方法能够高效且有效及时地判定网络丝束的抱团情况，然后以此判断网络喷嘴的工作状况，避免了现有技术中滞后且效率低下的方法。

Description

一种FDY网络异常的快速检测判断方法 技术领域
本发明属于化纤生产技术领域，具体涉及一种FDY网络异常的快速检测判断方法。
背景技术
在化纤生产中，对于FDY—全拉伸丝生产工艺流程，生产运行中如果发生网络喷嘴堵塞或侧向漏气等情况时，极易产生网络异常(其包括无网络、少网络等现象)，将直接影响丝束的网络结点数，降低了丝束的抱合性，存在着非常大的质量隐患，即会严重影响后期的加工性能。而对于日常FDY生产中网络异常的巡检管控的防范，现阶段基本上通过如下两种经验判断与实施方法：
一、通过工艺或现场卷绕作业人员巡检目测喷嘴处的丝条吹起状况，但此种方法只能将丝条完全不能吹起或丝条直接呈现一条线状态的无网现象直观地识别并找出异常，而对于生产中偶发出现的喷嘴内漏(或侧面密封泄露)引起网压降低的异常情况，此时丝条也能够正常吹起时，作业人员通过肉眼很难发现异常，从而容易将可能产生的少网现象忽视，导致异常网络丝的大量追溯甚至质量事故的发生。
二、工艺人员定期检测网络，由于水浴及物检仪器等的限制，加上毕竟出现网络异常的频次很低，安排定检，既耗费了大量的时间，占用了人力，增加了检测成本，且很难将该办法有效的固化定检并能坚持下来，且存在一定的滞后性。
因此，上述方法均存在一定的缺陷，实际应用时无法有效地解决全拉伸丝生产过程中出现的网络异常现象。
发明内容
本发明所要解决的技术问题是克服现有技术的不足，提供一种改进的FDY网络异常的快速检测判断方法。
本发明同时还提供了一种化纤的全拉丝生产方法。
为解决以上技术问题，本发明采取的一种技术方案如下：
一种全拉伸丝生产中网络异常的检测判断方法，所述全拉伸丝生产包括如下步骤：在气流的作用下，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，所述检测判断方法包括如下步骤：在全拉伸丝生产中，获取所述气流穿过所述网络喷嘴后的实际压力值，将所述实际压力值与压力阈值或所述气流的初始压力值进行对比；当所述实际压力值小于等于所述压力阈值或当所述实际压力值与所述气流的初始压力值的差值的绝对值超过设定阈值时，判定所述网络丝束出现网络异常。
本发明中，“实际压力值”可以为实时在线监测获得的所有时间节点的压力值，也可以为特定时间点(可以为固定时间点或不定时的时间节点)获得的压力值。
本发明中，“在气流的作用下，多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束”的原理即为气流在网络喷嘴中形成折向气流而使各个单丝相互缠结形成网络结点，此为现有技术中的常规方案，在此不作具体赘述。
根据本发明的一些优选且具体的方面，所述压力阈值通过如下方式获得：通过反向对比试验确定所述网络丝束出现网络异常时，所述气流穿过所述网络喷嘴后到达第一导丝器件或第二导丝器件时的试验压力值即为所述压力阈值。
根据本发明的一些优选方面，所述反向对比试验包括如下步骤：
(ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
(ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于预定值时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值。
根据本发明的一些具体方面，步骤(ⅱ)中，所述预定值为10-20个。
根据本发明的一些具体方面，步骤(ⅱ)中，所述质量检测通过水浴法进行，所述水浴法包括如下步骤：将所述待检网络丝束浸入水中，分散，计数所述待检网络丝束具有的网络结点数。
根据本发明的一些优选方面，所述第一导丝器件上设置有压力待检测位，所述试验压力值和/或所述实际压力值通过检测所述压力待检测位处的压力获得。
根据本发明的一些优选且具体的方面，所述第一导丝器件为U型导丝瓷件，所述纤维丝穿过所述U型导丝瓷件的开口内部，所述压力待检测位设置在所述U型导丝瓷件的开口处。
根据本发明的一些具体方面，所述第二导丝器件同样为U型导丝瓷件。
根据本发明的一些优选且具体的方面，通过压力检测仪检测得到所述实际压力值和/或所述试验压力值，所述压力检测仪包括风压表，以及一端与所述风压表连通，另一端与所述U型导丝瓷件的开口处连通的测量管路。
根据本发明的一些优选方面，使所述测量管路的所述另一端的进风口正对所述气流流出所述网络喷嘴的流动方向。
根据本发明的一些具体且优选的方面，所述检测判断方法还包括：使所述风压表与控制系统相通信连接以及所述控制系统与报警器通信连接的步骤，所述控制系统预植入程序，使所述风压表获取的所有所述实际压力值与所述压力阈值进行实时全程在线对比，当比对出所述实际压力值小于等于所述压力阈值时，发送指令给所述报警器发出报警提示。
在本发明的一些实施方式中，所述实际压力值通过人工主动采用压力检测仪去定时检测，即可将测量管路的所述进风口正对所述压力待检测位，由于所述压力待检测位设置在所述U型导丝瓷件的开口处，也即可以实现所述进风口正对所述气流流出所述网络喷嘴的流动方向，保证检测结果的准确性，同时还不会影响到纤维丝。
本发明同时提供的又一技术方案：一种化纤的全拉丝生产方法，所述生产方法包括对全拉伸丝生产中网络丝束出现异常的判断步骤，所述判断步骤包括上述所述的检测判断方法。
根据本发明，所述的纤维丝可以为选自聚对苯二甲酸乙二醇酯纤维、聚乳酸纤维、聚己内酯纤维、再生PET纤维、聚丁二酸丁二醇酯纤维、3-羟基丁酸酯与3-羟基戊酸酯的共聚物纤维、聚对苯二甲酸丁二酸丁二醇酯纤维、聚乙烯纤维、聚丙烯纤维、聚苯乙烯纤维、聚酰胺纤维、PTT纤维(聚对苯二甲酸1.3丙二醇酯纤维)、聚氯乙烯纤维和聚氨酯纤维中的一种或多种的组合。
由于以上技术方案的采用，本发明与现有技术相比具有如下优点：
本发明的全拉伸丝生产中网络异常的检测判断方法，发现了特定位置的压力变化的关系，进而创新地通过压力变化以及压力变化程度的方式去判断网络是否出现异常，一方面能够高效且有效地找出网络出现异常的情况，避免现有技术中肉眼观察以及滞后性的样品检测来判断是否出现网络异常(不准确且不稳定高效)，从而能够及时调整生产状况并找出相应时间段内质量不佳的网络丝束(将其剔除，避免引起后续加工质量问题等)，另一方面还能节约人力物力，保证了出库的产品质量稳定。
说明书附图
图1为本发明全拉伸丝生产中形成网络丝束的设备结构示意图；
图2为形成网络丝束的设备隐藏了部分结构后的示意图；
图3为气流与纤维丝作用关系示意图。
具体实施方式
目前化纤的全拉伸丝生产中会出现网络喷嘴堵塞或侧向漏气等情况，进而使得纤维丝成网出现异常(包括无网络、少网络等现象)，降低了丝束的抱合性，存在着非常大的质量隐患，即会严重影响后期的加工性能；而对于日常FDY生产中网络异常的巡检管控的防范，现有技术中常用的检测方法即通过肉眼观察或取样检测，但是存在观察不准确或者反馈严重滞后的缺陷，造成难以追溯异常网络丝束，进而难以将其有效剔除，同时无法做到频繁的定时检测，否则将造成生产成本的极大提升。
基于上述问题，本发明发明人在长期实践过程中发现：使纤维丝抱团形成网络结点的气流经过网络喷嘴后到达导丝器件时的压力与气流的初始压力值息息相关，具有同比变化的特点，同时当网络丝束出现网络异常时，所述气流经过网络喷嘴后到达导丝器件时的压力值同样会发生变化，进而发明人提出了通过压力变化以及压力变化的程度可以有效地推测网络丝束是否出现网络异常，且准确率高达99％以上；具体地，在全拉伸丝生产中，获取所述气流穿过所述网络喷嘴后的实际压力值，将所述实际压力值与压力阈值或所述气流的初始压力值进行对比；当所述实际压力值小于等于所述压力阈值或当所述实际压力值与所述气流的初始压力值的差值的绝对值超过设定阈值时，判定所述网络丝束出现网络异常。
优选地，所述压力阈值通过如下方式获得：通过反向对比试验确定所述网络丝束出现网络异常时，所述气流穿过所述网络喷嘴后到达第一导丝器件或第二导丝器件时的试验压力值即为所述压力阈值；其中，所述反向对比试验包括如下步骤：
(ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
(ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于预定值时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值。
具体地，步骤(ⅱ)中，所述预定值为10-20个。
具体地，步骤(ⅱ)中，所述质量检测通过水浴法进行，所述水浴法包括如下步骤：将所述待检网络丝束浸入水中，分散，计数所述待检网络丝束具有的网络结点数。
在本发明的优选实施方式中，所述第一导丝器件上设置有压力待检测位，所述试验压力值和/或所述实际压力值通过检测所述压力待检测位处的压力获得。
在本发明的优选实施方式中，所述第一导丝器件为U型导丝瓷件，所述纤维丝穿过所述U型导丝瓷件的开口内部，所述压力待检测位设置在所述U型导丝瓷件的开口处。
在本发明的优选实施方式中，通过压力检测仪检测得到所述实际压力值和/或所述试验压力值，所述压力检测仪包括风压表，以及一端与所述风压表连通，另一端与所述U型导丝瓷件的开口处连通的测量管路。
在本发明的优选实施方式中，使所述测量管路的所述另一端的进风口正对所述气流流出所述网络喷嘴的流动方向。
本发明同时提供的又一技术方案：一种化纤的全拉丝生产方法，所述生产方法包括对全拉伸丝生产中网络丝束出现异常的判断步骤，所述判断步骤包括上述所述的检测判断方法。
下面结合图1-3说明本发明检测判断方法，如图1-3所示，纤维丝经过第一导丝器件1(优选U型导丝器件)后穿过网络喷嘴2，然后在网络喷嘴2中形成具有多个网络结点的网络丝束(如图2-3所示，气流从气孔7进入，气流的方向垂直作用于纤维丝，进而在网络喷嘴2中形成折向气流使得多根纤维丝相互抱团形成具有网络结点的网络丝束)，然后经第二导丝器件3定向后进入后续工段；其中支座4用于支撑上述部件的设置；再次参见图1，其中测量管路5的进风口设置在第一导丝器件1的开口处且正对设置，将此处的气流导入风压表6进行压力测量进而获取了实际压力值，在第一导丝器件1处测量一方面可以使得操作人员测量方便(其设置在较高处且具有与测量管路5相配合的凸缘)，另一方面，在第一导丝器件1处测量还能避免影响到纤维丝，既能够避免碰到致使断裂而且还不会影响其成网。
以下结合具体实施例对上述方案做进一步说明；应理解，这些实施例是用于说明本发明的基本原理、主要特征和优点，而本发明不受以下实施例的范围限制；实施例中采用的实施条件可以根据具体要求做进一步调整，未注明的实施条件通常为常规实验中的条件。
实施例1
本例提供一种半消光聚对苯二甲酸乙二醇酯纤维(半消光PET纤维)的全拉伸丝生产中网络异常的检测判断方法，在全拉伸丝生产中，在气流的作用下(半消光PET纤维的给定压力为0.37Mpa)，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，所述检测判断方法包括如下步骤；
(1)压力阈值的获取
(ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
(ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于12个时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值；
具体的获取调整过程参见表1：
表1
Figure PCTCN2020101235-appb-000001
Figure PCTCN2020101235-appb-000002
根据表1，通过实验获得网络得到稳控的压力阈值为100Pa。
(2)在半个月内对生产过程中，通过现场技术工人中采用压力检测仪去定时检测，检测操作具体为：将测量管路的进风口正对压力待检测位，由于压力待检测位设置在第一导丝器件(即U型导丝瓷件)的开口处，也即可以实现进风口正对气流流出所述网络喷嘴的流动方向，获取的数据如下表2：
表2
Figure PCTCN2020101235-appb-000003
当出现测量的实际压力值小于等于压力阈值时，通知操作人员去现场查看，同时多次取样进行水浴法检测网络丝束的网络结点数，以此判断网 络喷嘴的工作状况(是否出现堵塞或侧向漏气等情况)，如出现，则必须进行在线清理或者停机检修或更换备用的网络喷嘴，进而可以避免生产出更多的残次品。
实施例2
本例提供一种尼龙6的全拉伸丝生产中网络异常的检测判断方法，在全拉伸丝生产中，在气流的作用下(尼龙6的给定压力为0.35Mpa)，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，所述检测判断方法包括如下步骤；
(1)压力阈值的获取
(ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
(ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于14个时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值；
具体的获取调整过程参见表3：
表3
Figure PCTCN2020101235-appb-000004
Figure PCTCN2020101235-appb-000005
根据表3，通过实验获得的压力阈值为150Pa。
(2)在半个月内对生产过程中，通过现场技术工人中采用压力检测仪去定时检测，检测操作具体为：将测量管路的进风口正对压力待检测位，由于压力待检测位设置在第一导丝器件(即U型导丝瓷件)的开口处，也即可以实现进风口正对气流流出所述网络喷嘴的流动方向，获取的数据如下表4：
表4
Figure PCTCN2020101235-appb-000006
当出现测量的实际压力值小于等于压力阈值时，通知操作人员去现场查看，同时多次取样进行水浴法检测网络丝束的网络结点数，以此判断网络喷嘴的工作状况(是否出现堵塞或侧向漏气等情况)，如出现，则必须进行在线清理或者停机检修或更换备用的网络喷嘴，进而可以避免生产出更多的残次品。
实施例3
本例提供一种聚对苯二甲酸1.3丙二醇酯纤维(PTT纤维)的全拉伸丝生产中网络异常的检测判断方法，在全拉伸丝生产中，在气流的作用下(PTT纤维的给定压力为0.3Mpa)，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，所述检测判断方法包括如下步骤；
(1)压力阈值的获取
(ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
(ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于12个时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值；
具体的获取调整过程参见表5：
表5
Figure PCTCN2020101235-appb-000007
Figure PCTCN2020101235-appb-000008
根据表5，通过实验获得的压力阈值为150。
(2)在半个月内对生产过程中，通过现场技术工人中采用压力检测仪去定时检测，检测操作具体为：将测量管路的进风口正对压力待检测位，由于压力待检测位设置在第一导丝器件(即U型导丝瓷件)的开口处，也即可以实现进风口正对气流流出所述网络喷嘴的流动方向，获取的数据如下表6：
表6
Figure PCTCN2020101235-appb-000009
Figure PCTCN2020101235-appb-000010
当出现测量的实际压力值小于等于压力阈值时，通知操作人员去现场查看，同时多次取样进行水浴法检测网络丝束的网络结点数，以此判断网络喷嘴的工作状况(是否出现堵塞或侧向漏气等情况)，如出现，则必须进行在线清理或者停机检修或更换备用的网络喷嘴，进而可以避免生产出更多的残次品。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围，凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (18)

  1. 一种全拉伸丝生产中网络异常的检测判断方法，所述全拉伸丝生产包括如下步骤：在气流的作用下，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，其特征在于，所述检测判断方法包括如下步骤：在全拉伸丝生产中，获取所述气流穿过所述网络喷嘴后的实际压力值，将所述实际压力值与压力阈值或所述气流的初始压力值进行对比；当所述实际压力值小于等于所述压力阈值或当所述实际压力值与所述气流的初始压力值的差值的绝对值超过设定阈值时，判定所述网络丝束出现网络异常；
    所述压力阈值通过如下方式获得：通过反向对比试验确定所述网络丝束出现网络异常时，所述气流穿过所述网络喷嘴后到达第一导丝器件或第二导丝器件时的试验压力值即为所述压力阈值；
    所述第一导丝器件上设置有压力待检测位，所述试验压力值和/或所述实际压力值通过检测所述压力待检测位处的压力获得；
    所述反向对比试验包括如下步骤：
    (ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
    (ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于预定值时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值；其中，所述预定值为10-20个；所述质量检测通过水浴法进行，所述水浴法包括如下步骤：将所述待检网络丝束浸入水中，分散，计数所述待检网络丝束具有的网络结点数。
  2. 根据权利要求1所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述第一导丝器件为U型导丝瓷件，所述纤维丝穿过所述 U型导丝瓷件的开口内部，所述压力待检测位设置在所述U型导丝瓷件的开口处。
  3. 根据权利要求1所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，通过压力检测仪检测得到所述实际压力值和/或所述试验压力值，所述压力检测仪包括风压表，以及一端与所述风压表连通，另一端与所述U型导丝瓷件的开口处连通的测量管路。
  4. 根据权利要求1所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，使所述测量管路的所述另一端的进风口正对所述气流流出所述网络喷嘴的流动方向。
  5. 根据权利要求3所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述检测判断方法还包括：使所述风压表与控制系统相通信连接以及所述控制系统与报警器通信连接的步骤，所述控制系统预植入程序，使所述风压表获取的所有所述实际压力值与所述压力阈值进行实时全程在线对比，当比对出所述实际压力值小于等于所述压力阈值时，发送指令给所述报警器发出报警提示。
  6. 根据权利要求1所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述的纤维丝为选自聚对苯二甲酸乙二醇酯纤维、聚乳酸纤维、聚己内酯纤维、再生PET纤维、聚丁二酸丁二醇酯纤维、3-羟基丁酸酯与3-羟基戊酸酯的共聚物纤维、聚对苯二甲酸丁二酸丁二醇酯纤维、聚乙烯纤维、聚丙烯纤维、聚苯乙烯纤维、聚酰胺纤维、聚对苯二甲酸1.3丙二醇酯纤维、聚氯乙烯纤维和聚氨酯纤维中的一种或多种的组合。
  7. 一种全拉伸丝生产中网络异常的检测判断方法，所述全拉伸丝生产包括如下步骤：在气流的作用下，使穿过第一导丝器件的多根纤维丝在网络喷嘴中形成具有多个网络结点的网络丝束，然后使所述的网络丝束经过第二导丝器件后进行加工处理，其特征在于，所述检测判断方法包括如下步骤：在全拉伸丝生产中，获取所述气流穿过所述网络喷嘴后的实际压力值，将所述实际压力值与压力阈值或所述气流的初始压力值进行对比；当所述实际压力值小于等于所述压力阈值或当所述实际压力值与所述气流 的初始压力值的差值的绝对值超过设定阈值时，判定所述网络丝束出现网络异常。
  8. 根据权利要求7所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述压力阈值通过如下方式获得：通过反向对比试验确定所述网络丝束出现网络异常时，所述气流穿过所述网络喷嘴后到达第一导丝器件或第二导丝器件时的试验压力值即为所述压力阈值。
  9. 根据权利要求8所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述反向对比试验包括如下步骤：
    (ⅰ)通过依次降低所述气流的预设初始压力值，获取每一个所述预设初始压力值下全拉伸丝生产的待检网络丝束，以及获取每一个所述预设初始压力值下全拉伸丝生产中的所述试验压力值；
    (ⅱ)对步骤(ⅰ)获得的所述待检网络丝束依次进行质量检测，所述质量检测包括对所述待检网络丝束具有的网络结点数的检测，当首次检测到所述待检网络丝束具有的网络结点数少于预定值时，判定所述待检网络丝束出现网络异常，此时出现网络异常的所述待检网络丝束对应的所述试验压力值即为所述压力阈值。
  10. 根据权利要求9所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，步骤(ⅱ)中，所述预定值为10-20个。
  11. 根据权利要求9所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，步骤(ⅱ)中，所述质量检测通过水浴法进行，所述水浴法包括如下步骤：将所述待检网络丝束浸入水中，分散，计数所述待检网络丝束具有的网络结点数。
  12. 根据权利要求8所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述第一导丝器件上设置有压力待检测位，所述试验压力值和/或所述实际压力值通过检测所述压力待检测位处的压力获得。
  13. 根据权利要求12所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述第一导丝器件为U型导丝瓷件，所述纤维丝穿过所述U型导丝瓷件的开口内部，所述压力待检测位设置在所述U型导丝瓷件的开口处。
  14. 根据权利要求13所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，通过压力检测仪检测得到所述实际压力值和/或所述试验压力值，所述压力检测仪包括风压表，以及一端与所述风压表连通，另一端与所述U型导丝瓷件的开口处连通的测量管路。
  15. 根据权利要求14所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，使所述测量管路的所述另一端的进风口正对所述气流流出所述网络喷嘴的流动方向。
  16. 根据权利要求14所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述检测判断方法还包括：使所述风压表与控制系统相通信连接以及所述控制系统与报警器通信连接的步骤，所述控制系统预植入程序，使所述风压表获取的所有所述实际压力值与所述压力阈值进行实时全程在线对比，当比对出所述实际压力值小于等于所述压力阈值时，发送指令给所述报警器发出报警提示。
  17. 根据权利要求7所述的全拉伸丝生产中网络异常的检测判断方法，其特征在于，所述的纤维丝为选自聚对苯二甲酸乙二醇酯纤维、聚乳酸纤维、聚己内酯纤维、再生PET纤维、聚丁二酸丁二醇酯纤维、3-羟基丁酸酯与3-羟基戊酸酯的共聚物纤维、聚对苯二甲酸丁二酸丁二醇酯纤维、聚乙烯纤维、聚丙烯纤维、聚苯乙烯纤维、聚酰胺纤维、聚对苯二甲酸1.3丙二醇酯纤维、聚氯乙烯纤维和聚氨酯纤维中的一种或多种的组合。
  18. 一种化纤的全拉丝生产方法，所述生产方法包括对全拉伸丝生产中网络丝束出现异常的判断步骤，其特征在于，所述判断步骤包括权利要求1-17中任一项权利要求所述的检测判断方法。
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