Air-blown microcable and its preparation process

Abstract

The present invention relates to the technical field of cable preparation, and specifically to an air-blown microcable and a preparation process thereof, wherein an outer sheath is extruded and formed on the periphery of an optical unit; the air-blown microcable comprises: a plurality of optical units, which are twisted and arranged; an outer sheath, which covers the periphery of the plurality of optical units, and a plurality of air-blowing holes are opened axially in the outer sheath; adjusting the airflow flow specifically comprises the following steps: obtaining real-time airflow data in each bronchus; based on the real-time airflow data, obtaining the airflow stability value of each bronchus, judging the stability of the bronchial output, and generating a bronchial stability signal; judging ventilation failures during the preparation of the air-blown microcable; comparing the bronchial simultaneous value with a threshold value, and generating a high and low signal of abnormal bronchial simultaneousness; adjusting the stability of the gas source output, and obtaining a flow range for process adjustment. The present invention ensures that the gas flow output in the airway is more stable during the subsequent preparation of the air-blown microcable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable preparation, and in particular to an air-blown microcable and a preparation process thereof. Background Art

[0002] Chinese patent CN117539011A discloses an air-blown microcable and a preparation method thereof, belonging to the field of optical fiber manufacturing technology, comprising a plurality of optical units, the plurality of optical units being twisted and arranged; an outer sheath, the outer sheath covering the outer periphery of the plurality of optical units, a plurality of air-blowing holes being axially opened in the outer sheath, the air-blowing holes being circumferentially uniformly distributed in the outer sheath, a plurality of protrusions being distributed in the air-blowing holes along the axial direction of the channel, and the plurality of protrusions at least partially overlapping with the air-blowing holes along the axial direction;

[0003] The existing air-blown micro-cable has an air-blowing hole added in the outer sheath, which can be used for air blowing, thereby increasing the contact area between the air-blown micro-cable and the airflow; at the same time, the protrusion is set so that when the airflow blows into the air-blowing hole, the airflow touches the protrusion, thereby hindering the flow of the airflow, increasing the thrust of the airflow on the air-blown micro-cable, and improving the air blowing distance of the air-blown micro-cable;

[0004] However, during the preparation of the air-blown microcable, it is not possible to accurately judge the ventilation failure in the preparation of the air-blown microcable according to the changes in the airflow in each channel, and it is even more impossible to make timely airflow adjustments according to the changes in the airflow in the channel, resulting in uneven adhesion of particles. Summary of the invention

[0005] The purpose of the present invention is to provide an air-blown microcable and a preparation process thereof. The technical problem solved by the present invention is that it is impossible to accurately judge the ventilation failure in the preparation process of the air-blown microcable according to the airflow changes in each channel, and it is even more impossible to make timely airflow adjustments according to the changes in the airflow in the channel, resulting in uneven adhesion of particles.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A preparation process of an air-blown micro-cable comprises the following steps: arranging a plurality of branch airways in an extrusion die and introducing airflow; adjusting the airflow rate and introducing particles into the airways; extruding a sheath material through the extrusion die and extruding an outer sheath around an optical unit to obtain an air-blown micro-cable; the air-blown micro-cable comprises:

[0008] There are a plurality of optical units, and the plurality of optical units are twisted and arranged;

[0009] An outer sheath, which covers the outer circumference of the plurality of optical units and has a plurality of air blowing holes axially opened in the outer sheath;

[0010] When the air-blown micro-cable is air-blown for laying, the air-blowing hole is used for air-blowing to increase the contact area between the air-blown micro-cable and the airflow; a protrusion is arranged inside the air-blowing hole, and the protrusion at least partially overlaps with the air-blowing hole along the axial direction of the air-blown micro-cable, so that when the airflow is passed into the air-blowing hole, the airflow touches the protrusion, thereby hindering the flow of the airflow; adjusting the airflow flow specifically includes the following steps:

[0011] Step 1: Obtain real-time airflow data in each bronchus;

[0012] Wherein, the real-time airflow data includes real-time airflow flow;

[0013] Step 2: Based on the real-time airflow data, the airflow stability value of each bronchus is obtained, the stability of the bronchus output is judged, and a bronchus stability signal is generated;

[0014] The airflow stability value includes a flow deviation ratio and a time deviation ratio, and the bronchial stability signal includes a bronchial stability signal or a bronchial instability signal;

[0015] Step 3: Based on the airway stability signal, the number of unstable bronchial airways is obtained to judge the ventilation failure during the preparation of the air-blowing microcable;

[0016] Step 4: based on the main airway pre-fault signal, obtain the bronchial simultaneous value, compare the bronchial simultaneous value with the bronchial simultaneous threshold, and generate a high and low signal of bronchial abnormal simultaneousness;

[0017] The abnormal simultaneous high and low signals of the bronchus include abnormal simultaneous low signals of the bronchus or abnormal simultaneous high signals of the bronchus;

[0018] Step 5: Based on the abnormal simultaneous high signal of the bronchial airway, the stability of the gas source output is adjusted to obtain the flow range [D1, D2] for process adjustment.

[0019] As a further solution of the present invention: the outer periphery of the optical unit is also coated with a water blocking tape;

[0020] As a further solution of the present invention: the raw materials of the outer sheath include, by weight, 12 parts of ethylene-vinyl acetate copolymer resin, 2 parts of polyolefin elastomer resin, 13 parts of linear low-density polyethylene resin, 1 part of high-density polyethylene resin, 3 parts of maleic anhydride grafted POE, 0.1 parts of antioxidant, 0.1 parts of radiation cross-linking agent, 1 part of organophosphorus flame retardant, 20 parts of magnesium calcium carbonate and 1 part of organosilicon flame retardant.

[0021] As a further solution of the present invention: in step 2, the airflow stability value of each bronchus is calculated by summing the flow offset ratio and the time offset ratio; if the airflow stability value is greater than or equal to the airflow stability threshold, a bronchial instability signal is generated;

[0022] The process of obtaining the time offset ratio is:

[0023] Obtain the duration of the abnormal bronchial airflow signal within the detection period, and mark it as a time offset value; calculate the ratio of the time offset value to the time standard value to obtain a time offset ratio;

[0024] The process of obtaining the flow offset ratio is as follows:

[0025] Obtain the airflow flow rate corresponding to the abnormal bronchial airflow signal, calculate the difference between the airflow flow rate and the endpoint of the flow range of the closest process standard to obtain the real-time airflow flow deviation value, sum up all the real-time airflow flow deviation values ​​within the detection period to obtain the flow offset value; calculate the ratio of the flow offset value to the flow offset standard value to obtain the flow offset ratio;

[0026] When setting the detection cycle, obtain the real-time air flow rate and compare the real-time air flow rate with the flow range of the process standard;

[0027] If the real-time airflow rate is not within the flow range of the process standard, a bronchial airflow abnormality signal is generated.

[0028] As a further solution of the present invention: in step 3, the number of bronchial instability signals is obtained, marked as the number of unstable bronchi, and the number of unstable bronchi is compared with the number of bronchi;

[0029] If the number of unstable bronchial airways is equal to the number of bronchial airways, a main airway pre-failure signal is generated.

[0030] As a further solution of the present invention: in step 4, if the bronchial simultaneous value is less than the bronchial simultaneous threshold, a bronchial abnormal simultaneous high signal is generated; when the bronchial abnormal simultaneous high signal is obtained, the stability of the gas source output is adjusted;

[0031] The process of obtaining the bronchial simultaneous value is as follows:

[0032] Obtain the starting time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus starting time fluctuation value ZBk;

[0033] Obtain the end time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus end time fluctuation value ZBj;

[0034] Obtain the maximum value of the flow offset ratio, advance the time corresponding to the maximum value of the flow offset ratio, mark it as the maximum time, obtain the maximum time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus maximum time fluctuation value ZBx;

[0035] By formula , the bronchial simultaneous value ZTZ is calculated, where a1, a2, and a3 are all weight proportional coefficients.

[0036] As a further solution of the present invention: in step 5, when a simultaneous high signal of abnormal bronchial airway is obtained, the flow range of the process standard is obtained, and the difference between the two end points of the flow range is calculated to obtain the interval flow length LQ;

[0037] Then obtain the maximum and minimum values ​​of the airflow flow, calculate the difference between the maximum and minimum values ​​of the airflow flow, and obtain the cycle flow length LT;

[0038] By formula , and the interval adjustment length LQt is calculated.

[0039] As a further solution of the present invention: by formula , calculate and obtain the first endpoint D1 of the flow range for process adjustment.

[0040] As a further solution of the present invention: by formula , calculate and obtain the second endpoint D2 of the flow range for process adjustment.

[0041] An air-blown microcable, the air-blown microcable comprising:

[0042] A plurality of optical units, wherein the plurality of optical units are twisted and arranged;

[0043] The outer sheath covers the outer periphery of the plurality of optical units, and a plurality of air blowing holes are axially opened in the outer sheath, and the plurality of air blowing holes are evenly distributed in the outer sheath in the circumferential direction.

[0044] Beneficial effects of the present invention:

[0045] (1) The air-blown microcable of the present invention has a pore structure inside the prepared air-blown microcable by adding an air channel during the extrusion microcable molding process. When the air-blown microcable is air-blown, the pores inside the optical cable can also pass the airflow, thereby increasing the friction between the airflow and the air-blown microcable, improving the pushing efficiency of the airflow on the air-blown microcable, and increasing the air-blowing distance. At the same time, the present application introduces particulate matter into the air channel, so that the particulate matter adheres to the inner wall of the optical cable pore during the molding process, so that the pore has a protruding structure. During the air-blowing process, these protruding structures will hinder the airflow, thereby increasing the thrust of the airflow on the air-blown microcable and increasing the air-blowing distance of the air-blown microcable.

[0046] (2) The present invention obtains real-time airflow data in each airway; based on the real-time airflow data, the airflow stability value of each bronchus is obtained, the stability of the bronchus output is judged, and a bronchus stability signal is generated; based on the airway stability signal, the number of unstable bronchi is obtained, and ventilation failures in the preparation process of the air-blown micro-cable are judged; the present invention can accurately judge ventilation failures in the preparation process of the air-blown micro-cable by judging whether the airflow of each bronchus is stable and outputting unstable signals, thereby achieving the effect of real-time monitoring of airway failures in the preparation process of the air-blown micro-cable and effectively analyzing the failure problems;

[0047] (3) The present invention obtains the bronchial simultaneous value based on the main airway pre-fault signal, compares the bronchial simultaneous value with the bronchial simultaneous threshold, and generates high and low signals of abnormal bronchial simultaneity; based on the high signal of abnormal bronchial simultaneity, the stability of the gas source output is adjusted to obtain the flow range [D1, D2] of the process adjustment; the present invention further analyzes the cause of the airway failure, and timely adjusts the flow range of the process based on the case where it is mainly caused by the gas source, thereby ensuring that the gas flow output in the airway is more stable during the subsequent air-blown microcable preparation process, so that particulate matter can enter the inside of the molded outer sheath from the airway more stably, and adhere to the air-blowing holes more evenly, thereby improving the quality of air-blown microcable generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below in conjunction with the accompanying drawings.

[0049] Figure 1 is a flowchart of Embodiment 1 of the present invention;

[0050] Figure 2 is a flowchart of Embodiment 2 of the present invention;

[0051] Figure 3 is a flowchart of Embodiment 3 of the present invention;

[0052] Figure 4 It is a structural schematic diagram of an air-blown microcable of the present invention;

[0053] Description of the drawings: 1. optical unit; 2. outer sheath; 3. air blowing hole; 4. particulate matter; 5. water blocking tape. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0055] See also Figure 4 As shown, the present invention is an air-blown microcable, comprising: a plurality of optical units 1, which are twisted and arranged; and an outer sheath 2, which covers the outer circumference of the plurality of optical units 1, and a plurality of air-blowing holes 3 are axially opened in the outer sheath 2, and the plurality of air-blowing holes 3 are circumferentially uniformly distributed in the outer sheath 2, and a plurality of protrusions are distributed in the air-blowing holes 3 along the axial direction of the channel, and the plurality of protrusions at least partially overlap with the air-blowing holes 3 along the axial direction;

[0056] The outer periphery of the optical unit 1 is also coated with a water-blocking tape 5 or a water-blocking yarn, or a water-blocking paste is coated on the outer periphery of the optical unit 1 to ensure the water-blocking performance of the air-blown microcable;

[0057] When the air-blowing micro-cable is air-blown for laying, the air-blowing hole 3 can also be used for air-blowing to increase the contact area between the air-blowing micro-cable and the airflow, improve the pushing efficiency of the airflow on the air-blowing micro-cable, and increase the air-blowing distance. Furthermore, since a protrusion is arranged inside the air-blowing hole 3, and the protrusion at least partially overlaps with the air-blowing hole 3 along the axial direction of the air-blowing micro-cable, when the airflow is passed into the air-blowing hole 3, the airflow will touch the protrusion, thereby hindering the flow of the airflow, so as to increase the thrust of the airflow on the air-blowing micro-cable and increase the air-blowing distance of the air-blowing micro-cable;

[0058] See also Figure 1 As shown, a preparation process of an air-blown microcable comprises the following steps:

[0059] Tractor optical unit 1, twisting multiple optical units 1 into a bundle;

[0060] An extrusion die is provided, and a plurality of tributaries are arranged in the extrusion die and airflow is introduced into the tributaries; the air inlet end of the tributaries is connected to the air outlet end of the main airway, and the main airway is connected to an air source; the airflow rate is adjusted, and particles 4 are introduced into the airway;

[0061] The extrusion die extrudes the sheath material to form an outer sheath 2 on the outer periphery of the optical unit;

[0062] The outer sheath 2 is composed of 12 parts of ethylene-vinyl acetate copolymer resin, 2 parts of polyolefin elastomer resin, 13 parts of linear low-density polyethylene resin, 1 part of high-density polyethylene resin, 3 parts of maleic anhydride grafted POE, 0.1 parts of antioxidant, 0.1 parts of radiation cross-linking agent, 1 part of organic phosphorus flame retardant, 20 parts of magnesium calcium carbonate and 1 part of organic silicon flame retardant by weight.

[0063] The organic phosphorus flame retardant is 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

[0064] The organic silicon flame retardant is a polysilicon boroxane flame retardant; and the antioxidant is selected from at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and dilauryl thiodipropionate. Example 2

[0065] See also Figure 2 As shown, based on the above embodiment 1, a flow adjustment system is provided in the bronchial airway to monitor and adjust the incoming airflow in real time, and the airflow adjustment also includes the following steps:

[0066] Step 1: Obtain real-time airflow data in each bronchus;

[0067] Wherein, the real-time airflow data includes real-time airflow flow;

[0068] In some embodiments, the real-time airflow rate in each bronchus is obtained and marked as Li, where i represents the number of bronchus;

[0069] Step 2: Based on the real-time airflow data, the airflow stability value of each bronchus is obtained, the stability of the bronchus output is judged, and a bronchus stability signal is generated;

[0070] The airflow stability value includes a flow deviation ratio and a time deviation ratio, and the bronchial stability signal includes a bronchial stability signal or a bronchial instability signal;

[0071] In some embodiments, a detection cycle is set to obtain the real-time air flow rate, and the real-time air flow rate is compared with the flow rate range of the process standard;

[0072] If the real-time airflow rate is within the flow range of the process standard, it means that the airflow rate output in the bronchus at the current moment is within the process standard range, and a bronchus airflow normal signal is generated;

[0073] If the real-time airflow rate is not within the flow range of the process standard, it means that the airflow rate output in the bronchus at the current moment is not within the process standard range, and a bronchus airflow abnormality signal is generated;

[0074] Analysis of abnormal bronchial airflow signals:

[0075] Obtain the duration of the abnormal bronchial airflow signal within the detection period, and mark it as a time offset value; calculate the ratio of the time offset value to the time standard value (the time standard value is the detection period) to obtain the time offset ratio;

[0076] and obtaining the airflow flow rate corresponding to the abnormal bronchial airflow signal, performing difference calculation between the airflow flow rate and the endpoint of the flow range of the closest process standard to obtain a real-time airflow flow deviation value, summing up all the real-time airflow flow deviation values ​​within the detection period to obtain a flow offset value; performing ratio calculation between the flow offset value and the flow offset standard value (the flow standard value is the product of the time offset value and the midpoint value of the flow range of the process standard) to obtain a flow offset ratio;

[0077] The flow deviation ratio and the time deviation ratio are summed and calculated to obtain the stable value of airflow in each bronchus;

[0078] The airflow stability value for each bronchus was compared with the airflow stability threshold;

[0079] If the airflow stability value is greater than or equal to the airflow stability threshold, it means that during the detection period, the airflow flow in the bronchus shows large fluctuations in time and flow, which does not meet the process requirements, and a bronchial instability signal is generated;

[0080] If the airflow stability value is less than the airflow stability threshold, it means that during the detection period, the airflow flow in the bronchus shows small fluctuations in time and flow, which meets the process requirements, and a bronchus stability signal is generated;

[0081] Step 3: Based on the airway stability signal, the number of unstable bronchial airways is obtained to judge the ventilation failure during the preparation of the air-blowing microcable;

[0082] In some embodiments, the number of bronchial instability signals is obtained, marked as the number of unstable bronchial airways, and the number of unstable bronchial airways is compared with the number of bronchial airways i;

[0083] If the number of unstable bronchial airways is equal to the number of bronchial airways i, it means that all bronchial airways are abnormally unstable, and a main airway pre-failure signal is generated;

[0084] If the number of unstable bronchi is less than the number of bronchi i, it means that some bronchi are abnormally unstable, and a bronchial fault signal is generated; when the bronchial fault signal is obtained, it is necessary to troubleshoot the bronchial corresponding to the bronchial unstable signal;

[0085] It should be explained that: the main airway fault signal indicates that during the preparation of the air-blowing microcable, there may be abnormal ventilation at the main airway end, which will cause instability in all bronchial airways; the bronchial fault signal indicates that during the preparation of the air-blowing microcable, the bronchial airway corresponding to the bronchial instability signal has an unstable problem during the ventilation process;

[0086] The technical solution of the embodiment of the present invention is as follows: real-time airflow data in each airway is obtained; based on the real-time airflow data, the airflow stability value of each airway is obtained, the stability of the bronchial output is judged, and a bronchial stability signal is generated; based on the airway stability signal, the number of unstable bronchi is obtained, and ventilation failures during the preparation of air-blown micro-cables are judged; the present invention can accurately judge ventilation failures during the preparation of air-blown micro-cables by judging whether the airflow of each bronchus is stable and then outputting an unstable signal, thereby achieving real-time monitoring of airway failures during the preparation of air-blown micro-cables and effectively analyzing failure problems. Example 3

[0087] See also Figure 3 As shown, based on Example 2, the following steps are also included:

[0088] Step 4: based on the main airway pre-fault signal, obtain the bronchial simultaneous value, compare the bronchial simultaneous value with the bronchial simultaneous threshold, and generate a high and low signal of bronchial abnormal simultaneousness;

[0089] The abnormal simultaneous high and low signals of the bronchus include abnormal simultaneous low signals of the bronchus or abnormal simultaneous high signals of the bronchus;

[0090] In some embodiments, if the bronchial simultaneous value is greater than or equal to the bronchial simultaneous threshold, indicating that the occurrence time of instability of each bronchus is greatly different, a bronchial abnormal simultaneous low signal is generated; when the bronchial abnormal simultaneous low signal is obtained, all bronchi are troubleshooted;

[0091] If the bronchial simultaneous value is less than the bronchial simultaneous threshold, it means that the difference in the occurrence time of each bronchial instability is small, and a bronchial abnormal simultaneous high signal is generated; when a bronchial abnormal simultaneous high signal is obtained, the stability of the gas source output is adjusted;

[0092] The process of obtaining the bronchial simultaneous value is as follows:

[0093] Obtain the starting time of the time offset value of each bronchus, and perform variance calculation to obtain the fluctuation value of the bronchus starting time;

[0094] Obtain the end time of the time offset value of each bronchus, and perform variance calculation to obtain the fluctuation value of the bronchus end time;

[0095] The maximum value of the flow offset ratio is obtained, and the time corresponding to the maximum value of the flow offset ratio is advanced, marked as the maximum time, the maximum time of the time offset value of each bronchus is obtained, and the variance is calculated to obtain the maximum time fluctuation value of the bronchus;

[0096] The fluctuation value at the beginning of the bronchial passage, the fluctuation value at the end of the bronchial passage, and the fluctuation value at the maximum of the bronchial passage are marked as ZBk, ZBj, and ZBx, respectively. , the bronchial simultaneous value ZTZ is calculated, where a1, a2, and a3 are weight ratio coefficients, a1+a2+a3=1, a1 is 0.34, a2 is 0.34, and a3 is 0.32. The values ​​of a1, a2, and a3 are expressed as the influence proportion of the bronchial start time fluctuation value, the bronchial end time fluctuation value, and the bronchial maximum time fluctuation value on the bronchial simultaneous value respectively;

[0097] Step 5: Based on the abnormal simultaneous high signal of the bronchial airway, the stability of the gas source output is adjusted to obtain the flow range [D1, D2] for process adjustment;

[0098] In some embodiments, when a simultaneous high signal of bronchial abnormality is obtained, the flow range of the process standard is obtained, and the difference between the two end points of the flow range is calculated to obtain the interval flow length LQ;

[0099] Then obtain the maximum and minimum values ​​of the airflow flow, calculate the difference between the maximum and minimum values ​​of the airflow flow, and obtain the cycle flow length LT;

[0100] By formula , calculate the interval adjustment length LQt;

[0101] Then through the formula , calculate the first endpoint D1 of the flow range for process adjustment, and use the formula , calculate the second endpoint D2 of the flow range of process adjustment, where QZ is the midpoint value of the flow range of the process standard, so that the flow range of process adjustment is [D1, D2];

[0102] The technical solution of the embodiment of the present invention: based on the main airway pre-fault signal, the bronchial simultaneous value is obtained, the bronchial simultaneous value is compared with the bronchial simultaneous threshold, and the bronchial abnormal simultaneous high and low signals are generated; based on the bronchial abnormal simultaneous high signal, the stability of the gas source output is adjusted to obtain the process adjusted flow range [D1, D2]; the present invention further analyzes the cause of the airway failure, and based on the case where it is mainly caused by the gas source, the process flow range is timely adjusted to ensure that in the subsequent air-blown micro-cable preparation process, the gas flow output in the airway is more stable, so that the particulate matter can enter the inside of the molded outer sheath more stably from the airway, and adhere to the air-blowing holes more evenly, thereby improving the quality of air-blown micro-cable generation. Example 4

[0103] Based on the above-mentioned Embodiment 2 and Embodiment 3, the step of adjusting the airflow rate is performed by a monitoring and adjusting system, and the adjusting system includes:

[0104] Acquisition module: obtains real-time airflow data in each bronchus;

[0105] Wherein, the real-time airflow data includes real-time airflow flow;

[0106] Bronchial judgment module: Based on real-time airflow data, obtain the airflow stability value of each bronchial airway, judge the stability of bronchial output, and generate a bronchial stability signal;

[0107] The airflow stability value includes a flow deviation ratio and a time deviation ratio, and the bronchial stability signal includes a bronchial stability signal or a bronchial instability signal;

[0108] Ventilation judgment module: Based on the airway stability signal, the number of unstable bronchial airways is obtained to judge ventilation failures during the preparation of air-blowing microcables;

[0109] Troubleshooting module: based on the main airway pre-fault signal, obtain the bronchial simultaneous value, compare the bronchial simultaneous value with the bronchial simultaneous threshold, and generate high and low signals of bronchial abnormal simultaneousness;

[0110] The abnormal simultaneous high and low signals of the bronchus include abnormal simultaneous low signals of the bronchus or abnormal simultaneous high signals of the bronchus;

[0111] Flow adjustment module: Based on the abnormal simultaneous high signal of the bronchial airway, the stability of the gas source output is adjusted to obtain the flow range [D1, D2] for process adjustment.

[0112] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0113] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A process for preparing an air-blown microcable, comprising the following steps: A plurality of tributaries are arranged in the extrusion die and airflow is introduced into the tributaries; Adjust the airflow rate to introduce particles into the airway; including: A plurality of air blowing holes are provided in the outer sheath along the axial direction; A protrusion is arranged inside the air blowing hole; the feature is that adjusting the air flow rate specifically includes the following steps: Step 1: Obtain real-time airflow data in each bronchus; Wherein, the real-time airflow data includes real-time airflow flow; Step 2: Based on the real-time airflow data, the airflow stability value of each bronchus is obtained, the stability of the bronchus output is judged, and a bronchus stability signal is generated; The airflow stability value includes a flow deviation ratio and a time deviation ratio, and the bronchial stability signal includes a bronchial stability signal or a bronchial instability signal; Step 3: Based on the airway stability signal, the number of unstable bronchial airways is obtained to judge the ventilation failure during the preparation of the air-blowing microcable; Step 4: based on the main airway pre-fault signal, obtain the bronchial simultaneous value, compare the bronchial simultaneous value with the bronchial simultaneous threshold, and generate a high and low signal of bronchial abnormal simultaneousness; The abnormal simultaneous high and low signals of the bronchus include abnormal simultaneous low signals of the bronchus or abnormal simultaneous high signals of the bronchus; Step 5: Based on the abnormal simultaneous high signal of the bronchial airway, the stability of the gas source output is adjusted to obtain the flow range [D1, D2] for process adjustment; The bronchial start time fluctuation value, the bronchial end time fluctuation value and the bronchial maximum time fluctuation value are calculated to obtain the bronchial simultaneous value.

2. The process for preparing an air-blown microcable according to claim 1, characterized in that: The process of obtaining the time offset ratio is: Obtain the duration of the abnormal bronchial airflow signal within the detection period, and mark it as a time offset value; calculate the ratio of the time offset value to the time standard value to obtain a time offset ratio; The process of obtaining the flow offset ratio is as follows: Obtain the airflow flow rate corresponding to the abnormal bronchial airflow signal, calculate the difference between the airflow flow rate and the endpoint of the flow range of the closest process standard to obtain the real-time airflow flow deviation value, and sum up all the real-time airflow flow deviation values ​​within the detection period to obtain the flow offset value; The flow offset value is calculated by ratioing the flow offset standard value to obtain the flow offset ratio.

3. The process for preparing an air-blown microcable according to claim 2, characterized in that: When setting the detection cycle, obtain the real-time air flow rate, and compare the real-time air flow rate with the flow range of the process standard; If the real-time airflow rate is not within the flow range of the process standard, a bronchial airflow abnormality signal is generated; In step 3, the number of unstable bronchial signals is obtained, marked as the number of unstable bronchial signals, and the number of unstable bronchial signals is compared with the number of bronchial signals; If the number of unstable airways is equal to the number of bronchi, a main airway pre-failure signal is generated; In step 4, if the bronchial simultaneous value is less than the bronchial simultaneous threshold, a bronchial abnormal simultaneous high signal is generated; when the bronchial abnormal simultaneous high signal is obtained, the stability of the gas source output is adjusted; The process of obtaining the bronchial simultaneous value is as follows: Obtain the starting time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus starting time fluctuation value ZBk; Obtain the end time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus end time fluctuation value ZBj; Obtain the maximum value of the flow offset ratio, advance the time corresponding to the maximum value of the flow offset ratio, mark it as the maximum time, obtain the maximum time of the time offset value of each bronchus, and perform variance calculation to obtain the bronchus maximum time fluctuation value ZBx; By formula , the bronchial simultaneous value ZTZ is calculated, where a1, a2, and a3 are weight proportional coefficients; In step 5, when a simultaneous high signal of bronchial abnormality is obtained, the flow range of the process standard is obtained, and the difference between the two end points of the flow range is calculated to obtain the interval flow length LQ; Then obtain the maximum and minimum values ​​of the airflow flow, calculate the difference between the maximum and minimum values ​​of the airflow flow, and obtain the cycle flow length LT; By formula , calculate the interval adjustment length LQt; By formula , calculate and obtain the first endpoint D1 of the flow range of process adjustment; By using the formula , calculate and obtain the second endpoint D2 of the flow range for process adjustment.

4. The process for preparing an air-blown microcable according to claim 1, characterized in that: The outer periphery of the optical unit is also covered with a water blocking tape.

5. The process for preparing an air-blown microcable according to claim 4, characterized in that: The raw materials of the outer sheath include 12 parts of ethylene-vinyl acetate copolymer resin, 2 parts of polyolefin elastomer resin, 13 parts of linear low-density polyethylene resin, 1 part of high-density polyethylene resin, 3 parts of maleic anhydride grafted POE, 0.1 parts of antioxidant, 0.1 parts of radiation cross-linking agent, 1 part of organophosphorus flame retardant, 20 parts of magnesium calcium carbonate and 1 part of organosilicon flame retardant, by weight.

6. An air-blown microcable, characterized in that: The air-blown micro-cable is prepared by the process described in any one of claims 1 to 5 above, and the air-blown micro-cable comprises: A plurality of optical units, wherein the plurality of optical units are twisted and arranged; The outer sheath covers the outer periphery of the plurality of optical units, and a plurality of air blowing holes are axially opened in the outer sheath, and the plurality of air blowing holes are evenly distributed in the outer sheath in the circumferential direction.

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