Spinning method based on spinning microenvironment system

Abstract

The invention relates to a spinning method based on a spinning microenvironment system, in the spinning process, constant-temperature and constant-humidity air flow is conveyed to each spinning unit through a variable cross-section air supply pipeline, and the air flow quantity and the air flow speed conveyed to each spinning unit are equal; all the spinning units are independently connected with the variable-cross-section air supply pipeline through branch pipes, the cross sectional areas of all the branch pipes are equal and equal to the cross sectional area of the output end of the variable-cross-section air supply pipeline, all the branch pipes are distributed in the length direction of the variable-cross-section air supply pipeline at equal intervals, and the interval is the spindle distance L of the spinning units; the section of the variable-section air supply pipeline is round, square or rectangular, and the cross section area, length or width of the variable-section air supply pipeline from the airflow input end to the airflow output end is evenly decreased. Each spinning unit is provided with a unit fairing composed of a fairing body and a flow guide plate, and the flow guide plate is a perforated plate provided with uniform through holes in the thickness direction. The microenvironment temperature and humidity of the drafting area of the spinning unit are stable, and the yarn forming quality and the production efficiency are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning and relates to a spinning method based on a spinning microenvironment system. Background Art

[0002] There are three types of spinning technologies commonly used in the world: ring spinning, rotor spinning, and vortex spinning. Ring spinning has a history of more than 250 years; rotor spinning began to be used in the 1960s; vortex spinning began to be used at the beginning of this century (industrialized by Murata Corporation of Japan in 2002), and is currently the most advanced spinning technology in the world. Traditional ring spinning and vortex spinning are open spinning, and rotor spinning is closed spinning. Therefore, the spinning units of ring spinning and vortex spinning are greatly affected by the ambient temperature and humidity. The speed of the vortex spinning drafting roller (above 5000 rpm) is more than 30 times that of the ring spinning roller (160 rpm). The traditional ring spinning roller has basically no temperature rise, and the temperature rise of the front roller of vortex spinning reaches 25-30°C; therefore, the fluctuation of temperature and humidity has a significant impact on the yarn quality and efficiency of vortex spinning equipment. It is an industry consensus that vortex spinning workshops must be installed with refrigeration and air conditioning (ring spinning has no strict requirements) to ensure the stability of the ambient temperature and humidity. However, it is a pain point for the industry to ensure that the temperature and humidity fluctuations of the vortex spinning unit are small and the problem of roller heat dissipation is a pain point faced by the industry.

[0003] For example, document 1 (Analysis of Factors Affecting the Efficiency of No. 861 Vortex Spinning Machine. Cotton Textile Technology. 2010, No. 12, pp. 12-15. Article number: 1001-7415 (2010) 12-0012-04) points out that "the number of efficiency losses caused by temperature and humidity fluctuations accounts for about 70% of the total number of efficiency losses". Document 2 (Analysis of Factors Affecting the Quality of Pure Cotton Jet Vortex Color Spinning Yarn. Cotton Textile Technology. 2020, No. 12, pp. 47-50. Article number: 1000-7415 (2020) 12-0047-04) The test results show that when the temperature is 20°C, the effect on the yarn quality index is not significant; when the temperature is 30°C, with the change of relative humidity, the difference in yarn quality has a significant change, mainly manifested in that the yarn breaking strength is the highest when the relative humidity is 58%; when the temperature is 40°C, the spinning quality and production efficiency are both poor.

[0004] Traditional spinning speed is low (less than 25 m / min), while modern new spinning speed is as high as 400 m / min or more. Under high-speed spinning, the high-speed rotation of the drafting roller generates high temperature, which causes the performance of the rubber roller and the leather ring to change, and then produces harmful behaviors such as entanglement and poor drafting. It is necessary to solve the problem of roller entanglement by ensuring the temperature and humidity of the workshop and treating the surface of the roller with chemical coating. Therefore, modern high-speed spinning must ensure a standard working environment of constant temperature and humidity to ensure the normal operation of the equipment. The existing solution is to add large-scale refrigeration equipment to the entire plant and adjust the temperature and humidity of the entire plant to ensure the temperature and humidity requirements of the spinning unit. However, there are the following disadvantages in ensuring the temperature and humidity of the plant by controlling the macro environment:

[0005] (1) The uniformity of the temperature and humidity of the environment is poor; factors such as the location of the air-conditioning outlet, the heating part of the equipment, and the vicinity of doors and windows will cause large differences in the temperature and humidity of the spinning unit; for example, document 3 (Methods and Practices for Improving the Uniformity of Temperature and Humidity in Spinning Workshops. Cotton Textile Technology. 2023, Issue 5, Pages 59-52. Article Number: 1000-7415 (2023) 05-0059-04) mentioned that "due to the great influence of temperature and humidity on the strength, hairiness and other indicators of the yarn during the drawing, twisting and forming process of the spinning, the quality of the yarn produced by the same spinning machine varies. If the relative humidity is too low or too high, the phenomenon of increased end breakage will affect production efficiency."

[0006] (2) High energy consumption; because the temperature and humidity of the entire factory need to be kept stable, but the large space and poor thermal insulation of the factory lead to an increase in cooling capacity.

[0007] (3) The flying fibers and dust in the factory pollute the spinning and drawing area; the existing spinning units are all open spinning, and the flying fibers and dust can easily enter the drawing area, causing yarn quality problems.

[0008] (4) The air in the workshop is polluted, which seriously affects the physical and mental health of workers. In order to maintain the temperature and humidity of large workshops stable, based on energy saving and central air-conditioning load considerations, air-conditioning units usually use internal circulation and less fresh air is added.

[0009] In order to solve the above problems, patent CN202410033042.9 discloses a spinning method and yarn of vortex spinning, and discloses a separate temperature control of the drafting zone of the spinning unit to improve the quality of the yarn. However, this patent is only a spinning process for special fibers, which reduces the volatilization of chemical oils by cooling the fibers. Its disadvantages are: blowing in cold air can easily cause yarn fiber disorder and affect the quality of fiber drafting; and the cold air only acts on the yarn body of the fiber, and has no cooling effect on the entire drafting system; and the biggest problem is that it cannot solve the problem of humidity stability of the drafting system and heat dissipation of the roller; at the same time, blowing will produce more flying flowers, leading to yarn quality problems.

[0010] Therefore, it is of great significance to study a systematic solution to solve the problems existing in the existing technology. Summary of the invention

[0011] The purpose of the present invention is to solve the problems existing in the prior art and provide a spinning method based on a spinning microenvironment system.

[0012] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0013] A spinning method based on a spinning microenvironment system, during the spinning process, a constant temperature and humidity airflow is delivered to each spinning unit through a variable cross-section air supply duct, and the airflow volume and airflow velocity delivered to each spinning unit are equal; all spinning units are independently connected to the variable cross-section air supply duct through a branch pipe, the cross-sectional areas of all the branch pipes are equal and equal to the cross-sectional area of ​​the output end of the variable cross-sectional air supply duct, and all the branch pipes are evenly spaced along the length direction of the variable cross-sectional air supply duct, and the spacing is the spindle pitch L of the spinning unit;

[0014] The cross section of the variable cross-section air supply duct is circular or square. The cross-sectional area of ​​the variable cross-sectional air supply duct decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional radius or side length is (1 / n) 1 / 2 , where n is the number of spinning units; Figure 2 The variable cross-section main air duct of the prior art is shown in the figure. Each section has different sizes (one end is large and the other end is small), the manufacturing process is complicated, and it is not suitable for mass production; and the appearance is not neat and does not coordinate with the appearance of the whole machine. The present invention adopts the method of uniformly manufacturing air ducts with uniform cross-sections (with the air inlet cross-section as the largest), and uses inclined plates with a uniform slope (the slope is (1 / n) 1 / 2 ) The uniform cross section is divided to achieve a variable cross section. This method has a standard manufacturing method, simple process, low manufacturing cost, and is most suitable for mass production; and the appearance is uniform and beautiful.

[0015] Alternatively, the cross section of the variable cross-section air supply duct is rectangular, the length or width of the cross section of the variable cross-section air supply duct from the airflow input end to the airflow output end is uniformly reduced, and the gradient rate of the uniformly reduced length or width is 1 / n, where n is the number of spinning units;

[0016] By calculating that the air flow rate required for a single microenvironment to achieve temperature and humidity balance is Q1, and the air flow speed does not interfere with fiber drawing, the air flow speed is V (the friction loss of the pipeline is not considered, and the flow rates of the variable-section air supply duct and the branch pipe are equal), and the cross-sectional area of ​​the air inlet branch of each microenvironment is S1 (the cross-sectional area of ​​each branch pipe remains unchanged).

[0017] in:

[0018] Q1= V* S1 (1);

[0019] Assume that there are n spinning units (microenvironments), and the total flow rate of the variable cross-section air supply duct is Q;

[0020] Q=n* Q1= n*V* S1 (2);

[0021] The cross-sectional area of ​​the airflow input end of the variable-section air supply duct is S;

[0022] S = Q / V (3);

[0023] If the variable cross-section air supply duct is a constant cross-section air supply duct (S remains unchanged), the duct flow rate Q gradually decreases from the head end to the tail end. From formula (3), it can be concluded that the air flow velocity V also decreases in the same proportion. From formula (1), it can be concluded that the air flow rate Q1 of each microenvironment also decreases in the same proportion. This leads to a large difference in the microenvironment air flow rate Q1 at the head end and the tail end of the duct.

[0024] If the micro-environment airflow Q1 at the head and tail ends of the pipeline is to be kept constant, it can be concluded from formula (1) that the airflow velocity V must remain constant. It can be concluded from formula (3) that as the pipeline flow Q decreases, the main pipeline cross-section S also decreases in the same proportion (variable cross-section). Substituting formula (2) into formula (3), we get:

[0025] S= n* S1 (4);

[0026] It can be seen from formula (4) that the cross-section of the airflow input end of the variable cross-section air supply duct is n*S1, and the minimum cross-section at the end is S1. When the cross-section of the variable cross-section air supply duct is circular or square, the gradient rate of the cross-sectional radius or side length is (1 / n) 1 / 2 (S1 is moved to the left side of the formula, and the square root is taken at the same time); When the cross section of the variable cross-section air supply duct is a rectangle, the length or width of the cross-sectional area of ​​the variable cross-section air supply duct from the airflow input end to the output end decreases uniformly, and the gradient rate of the uniformly decreasing length or width is 1 / n (S1 is moved to the left side of the formula, and the width or length that does not change is eliminated at the same time);

[0027] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes in the thickness direction. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, that is, the bottom of the drafting area of ​​the spinning unit is open, and the airflow flows downward, while the upper part and the front, rear, left and right are surrounded by the fairing body. The guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit, so that the introduced airflow becomes soft through the uniformly distributed small holes, thereby avoiding the airflow disturbing the drafting whiskers;

[0028] During the spinning process, the temperature fluctuation range in each spinning unit is the set value ±2°C, and the humidity fluctuation range is the set value ±2.5%.

[0029] In view of the shortcomings of the prior art, the present invention uses modern refined control technology to change the method of controlling the temperature and humidity of the equipment environment into a precise "point-to-point" temperature and humidity control method. Through the analysis of the spinning process, the drafting area of ​​the spinning unit is the most affected by the change of environmental temperature and humidity. Therefore, a micro-environment with temperature and humidity control is established for the drafting area of ​​each spinning unit to evenly transport the airflow of the central air conditioner to each spinning unit, and a stable micro-environment is formed in the drafting area with a unit fairing. The gas flow rate for maintaining the temperature and humidity balance of each micro-environment is calculated by simulation technology, the gas flow rate is controlled, and then the airflow is uniformly and gently applied to the entire system through the guide plate. In this way, the temperature and humidity of the environment are changed from being controlled to being controlled locally, which not only increases the accuracy, but also greatly saves energy. At the same time, since there is a constant temperature and humidity airflow input in the unit fairing of the drafting area, a micro-positive pressure is formed on the outside, which prevents the external flying flowers and dust from entering the drafting area, thereby improving the yarn quality. The workshop environment can be supplemented with a large amount of fresh air from the outside, while the temperature and humidity of the microenvironment are not affected by this, which greatly improves the workshop working environment. The present invention is a systematic solution based on the heat dissipation of the rollers of the entire drafting system, the balance of temperature and humidity, the volatilization of fiber oil, and the prevention of external flying waste from affecting the drafting quality.

[0030] As the preferred technical solution:

[0031] In the spinning method based on the spinning microenvironment system as described above, a thermal insulation layer is installed on the inner wall of the variable-section air supply duct to ensure that the transported airflow is not affected by the external environment.

[0032] In a spinning method based on a spinning microenvironment system as described above, all branch pipes are hoses, and the diameter of the hose is greater than or equal to 100mm. The cold air outlet cross-section of patent CN202410033042.9 is very small, and the output flow cannot achieve the purpose of cooling the drafting system. The branch output port diameter (i.e., the hose diameter) must be greater than or equal to 100mm to meet the temperature and humidity balance requirements of the spinning unit. In addition, patent CN202410033042.9 only blows cold air to the drafting area, and the temperature and humidity of the open environment cannot reach a balance. Due to the high temperature and humidity of the environment, condensation water will form on the drafting components (and the greater the amount of cold air, the more serious the condensation phenomenon), affecting the drafting quality.

[0033] In the spinning method based on the spinning microenvironment system as described above, the diameter of the through holes on the guide plate is 2 to 3 mm, and the proportion of the through holes is 30 to 35%.

[0034] As described above, a spinning method based on a spinning microenvironment system adopts a vortex spinning process, and the process flow is fiber→blowing→combing→drawing→vortex spinning→yarn. The method of the present invention is not limited to vortex spinning, but is also applicable to open spinning processes.

[0035] In the spinning method based on the spinning microenvironment system as described above, the air flow rate Q1 in each spinning unit is 7 to 8 m 3 / h, the air flow velocity is less than or equal to 2m / s. Ring spinning and vortex spinning are both open spinning, and the drafting is greatly affected by temperature and humidity fluctuations, but the speed of ring spinning is low (the speed of the drafting roller is about 160 rpm), and the heat dissipation of the roller is basically balanced with the ambient temperature, and there is no heat dissipation problem. Controlling the large environment of the workshop can basically guarantee its requirements for ambient temperature and humidity. The speed of the vortex spinning drafting roller (more than 5000 rpm) is more than 30 times that of the ring spinning drafting roller (160 rpm). The drafting roller is the part of the drafting system that generates the most heat. Under normal conditions, the drafting roller of the traditional ring spinning process has basically no temperature rise, while the temperature rise of the drafting roller of the vortex spinning reaches 25-30°C. Using the method of the present invention, through multiple simulations and verifications, when the airflow output flow rate in each spinning unit reaches Q1 under the microenvironment, the airflow velocity is set to be less than 2m / s, and the temperature rise of the drafting roller is basically balanced (temperature rise 5-8°C).

[0036] For the microenvironment, the lower the air flow rate, the better, so that it will have less interference with the drafting state of the fiber. However, the microenvironment requires a certain air flow rate to take away the heat generated by the roller. Through multiple simulations and verifications, it can be seen from the test that the air flow velocity less than or equal to 2m / s has basically no effect on the drafting state of the fiber.

[0037] A spinning method based on a spinning microenvironment system as described above, when the fiber is cotton fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 26±2°C and 52±2.5%, respectively, the yarn evenness uniformity is ≤15.5%, the number of kneps per kilometer (+200%) (i.e., the kilometer kneps at the +200% gear of the yarn evenness meter sensitivity threshold) is ≤60 / km, the single yarn breaking strength is ≥19cN / tex, the single yarn strength variation coefficient is ≤9%, and the yarn defects per 100,000 meters are ≤5 / 100km;

[0038] When the fiber is cellulose fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 28℃±2℃, 55%±2.5%, the yarn evenness is ≤15%, the number of cotton knots per kilometer (+200%) is ≤50 / km, the single yarn breaking strength is ≥10.5cN / tex, the single yarn strength variation coefficient is ≤10%, and the yarn defects per 100,000 meters are ≤15 / 100km;

[0039] When the fiber is polyester fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 28±2℃ and 58±2.5%, the yarn evenness is ≤15%, the number of cotton knots per kilometer (+200%) is ≤30 / km, the breaking strength of a single yarn is ≥22cN / tex, the coefficient of variation of single yarn strength is ≤10.5%, and the number of yarn defects per 100,000 meters is ≤15 / 100km.

[0040] In the spinning method based on the spinning microenvironment system as described above, the constant temperature and humidity airflow is generated by the air conditioning unit and transported to the variable cross-section air supply duct; the air conditioner is electrically connected to a system control box, and the system control box is used to control the temperature, humidity and wind speed of the constant temperature and humidity airflow generated by the air conditioner.

[0041] In a spinning method based on a spinning microenvironment system as described above, a temperature and humidity sensor and a wind speed sensor are provided in the variable-section air supply duct, and the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively. When the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity airflow, the system control box controls the air-conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity airflow.

[0042] The present invention uses fluid simulation calculation to evenly deliver the constant temperature and humidity air output by the air conditioning unit to each spinning unit; Figure 1 As shown in the figure, the temperature and humidity of each spinning unit are kept stable through the accurate PID closed-loop control algorithm of temperature, humidity, flow rate and other parameters. Figure 7 As shown in the figure: "Process hot return air" is the air recycled from the workshop (providing heat to reduce energy consumption), and "sharing a probe" means using the temperature and humidity sensor of the workshop environment. The workshop return air is filtered out of dust and short fluff by the fresh air primary filter of the box body. A part of it is directly recycled as a balanced airflow through the secondary return air valve to adjust the ratio, and the other part is mixed with fresh air through the fresh air valve and enters the refrigeration unit. The dew point is controlled by the compressor (dehumidification and cooling) to achieve the required temperature and humidity air, which is mixed with the secondary return air and delivered to each spinning unit. PID closed-loop adjustment is performed under the monitoring of the delivery sensor to achieve constant temperature and humidity of the spinning unit. Its core: converting analog control into digital control, which is more precise. The PID controller automatically adjusts the temperature, humidity and wind speed equipment according to the difference between the set target value and the sensor value to achieve automatic control of temperature, humidity and flow rate.

[0043] In a spinning method based on a spinning microenvironment system as described above, the circumferential surface of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose, so that the constant temperature and humidity airflow is delivered to the fairing body; a throttle valve is provided at the connection between the hose and the circumferential surface of the variable-section air supply duct, which is used to adjust the air flow delivered to the unit fairing; theoretically, the V in the variable-section air supply duct is set to a constant value, but in fact, due to the loss of the pipeline, there is still a difference in air flow rate from the airflow input end to the output end of the variable-section air supply duct. The throttle valve is set to reduce the cross-section, thereby reducing the flow rate (reducing the flow rate of the branch pipe with a large flow rate) to ensure that the flow rate of all hoses is consistent.

[0044] In the spinning method based on the spinning microenvironment system as described above, when the cross section of the variable cross-section air supply duct is circular or square, the slope K of the variable cross-section air supply duct is r1*(n 1 / 2 -1) / L*(n-1); r1 is the radius or side length of the cross section of the output end of the variable cross-section air supply duct; L is the distance between the central axes of two adjacent branch pipes, that is, the spindle pitch of the spinning unit; n is the number of branch pipes;

[0045] The specific derivation process is:

[0046] K = △r / L*(n-1) (5);

[0047] Where: K——variable section slope;

[0048] △r——△r=r-r1, which is the difference between the maximum radius and the minimum radius (mm);

[0049] L——spindle spacing of the spinning unit (mm);

[0050] r=r1*n 1 / 2 ;

[0051] but:

[0052] △r=r-r1= r1*n 1 / 2 - r1 = r1*(n 1 / 2 -1) (6);

[0053] Substituting (6) into (5), we get:

[0054] K= r1*(n 1 / 2 -1) / L*(n -1) (7);

[0055] According to formula (7), when n is determined, K is determined;

[0056] When the cross section of the variable cross section air supply duct is a rectangle, the slope K = b1 / L; b1 is the uniformly reduced length or width of the cross section of the output end of the variable cross section air supply duct; L is the distance between the central axes of two adjacent branch pipes, that is, the spindle pitch of the spinning unit; n is the number of branch pipes, that is, the number of spinning units;

[0057] The specific derivation process is:

[0058] S = a*b (8);

[0059] S1=a*b1 (9);

[0060] Where: a——the width of the variable cross-section air supply duct (mm);

[0061] b——the height of the input end of the variable cross-section air supply duct (mm);

[0062] b1——the height of the output end of the variable cross-section air supply duct (mm);

[0063] (The above derivation process can also control the height to remain unchanged and the width to change);

[0064] S=n* S1= n* a*b1 (10);

[0065] K =( b- b1) / L*n=( n* b1- b1) / L*(n-1)= b1 *( n-1) / L*(n-1)= b1 / L (11);

[0066] According to formula (11), when n is determined, K is determined.

[0067] The spinning method based on the spinning microenvironment system as described above can transform a uniform cross-section air supply duct into a variable cross-section air supply duct. Specifically, an inclined plate is arranged in the uniform cross-section air supply duct, the slope of the inclined plate with the horizontal plane is K, the horizontal length of the inclined plate is the same as the length of the uniform cross-section air supply duct, and the width of the inclined plate is the same as the width of the uniform cross-section air supply duct; the structure surrounded by the lower surface of the inclined plate and the uniform cross-section air supply duct is the variable cross-section air supply duct.

[0068] The subsequent embodiments of the present invention only illustrate the technical solution of one set of air conditioning units for one device; Figure 6 The diagram shows a technical solution for using a central air-conditioning unit to supply air to multiple devices, where the main air supply duct is the sum of the flow rates of individual units. To ensure flow balance of individual units at the front and rear ends of the main air supply duct, the main air supply duct can carry a maximum of 10 individual units, or it can be made into a ring-shaped main air supply duct with no limit on the number of individual units.

[0069] Beneficial effects:

[0070] (1) The spinning method based on the spinning microenvironment system of the present invention ensures that the temperature and humidity of each spinning unit are consistent by accurately controlling the microenvironment temperature, humidity, flow rate and flow rate of each spinning unit, thereby ensuring the working stability of the spinning unit. The control of the macro-environment and the "point-to-point" control of the microenvironment can significantly save energy and reduce consumption, and the system can save more than 80% of energy.

[0071] (2) The present invention provides a spinning method based on a spinning microenvironment system, wherein the microenvironment temperature and humidity in the drafting zone of the spinning unit are stable, thereby preventing the entanglement of the drafting components and improving the service life and spinning efficiency of the drafting equipment; at the same time, it prevents external flying flowers and dust from entering the drafting zone, thereby improving the yarn quality.

[0072] (3) The present invention provides a spinning method based on a spinning microenvironment system. Compared with the traditional method, the device reduces energy consumption per ton of yarn and consumables per ton of yarn, improves yarn quality and production efficiency, and significantly improves the overall benefits of spinning.

[0073] (4) The present invention provides a spinning method based on a spinning microenvironment system. The microenvironment of the drafting area of ​​the spinning unit is not affected by the external environment. The workshop can be supplemented with a large amount of fresh air, which greatly improves the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 This is a schematic diagram of the implementation of a single vortex spinning microenvironment;

[0075] Figure 2 It is a front view of the middle section of a vehicle body of the prior art;

[0076] Figure 3 A side view of the middle section of the vehicle body of the present invention;

[0077] Figure 4 It is an axonometric view of the middle section of the vehicle body of the present invention;

[0078] Figure 5 for Figure 3 A partial enlarged view of the middle unit fairing;

[0079] Figure 6 It is a multi-machine vortex spinning microenvironment implementation plan;

[0080] Figure 7 It is a schematic diagram of the principle of fluid simulation technology;

[0081] Among them, 1-air conditioning unit, 2-variable cross-section air supply duct, 3-unit fairing, 4-system control box, 5-hose, 6-variable cross-section dividing inclined plate, 7-drafting area, 8-jet vortex spinning machine, 9-fairing body, 10-guide plate. DETAILED DESCRIPTION

[0082] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall into the scope limited by the appended claims of the application equally.

[0083] In the embodiments and comparative examples of the present invention, for the indicators of yarn uniformity, number of cotton knots per thousand meters, single yarn breaking strength, single yarn strength variation coefficient, and yarn defects per hundred thousand meters, when the fiber is cotton fiber, the yarn performance test is carried out in accordance with the standard "Jet Vortex Spun Viscose Pure Spun and Polyester Viscose Blended Natural Yarn" FZ / T 12039-2013; when the fiber is cellulose fiber or polyester fiber, the yarn performance test is carried out in accordance with the standard "Jet Vortex Spun Polyester-Cotton Blended Natural Yarn" FZ / T 12068-2021.

[0084] Example 1

[0085] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0086] like Figures 3-4 As shown, during the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit of the jet vortex spinning machine 8 through the variable cross-section air supply duct 2, and the air conditioner is electrically connected to a system control box; the air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal, and the air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0087] The variable cross-section air supply duct 2 is obtained by setting a variable cross-section dividing inclined plate 6 on a uniform cross-section air supply duct; a heat preservation layer is installed on the inner wall of the variable cross-section air supply duct 2, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable cross-section air supply duct 2; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0088] A unit fairing 3 is installed on each spinning unit, and the unit fairing 3 consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%; the fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area 7 of the spinning unit; Figure 5 As shown, Figure 3 A partial enlarged view of the middle unit fairing 3 shows the functions of each functional component: the fairing body 9 is used to concentrate the airflow and guide it to the stretching component, and at the same time it can prevent external flying flowers and dust from entering the stretching area 7; the guide plate 10 is used to evenly guide the airflow to the stretching area 7 to avoid affecting the stretching of the whiskers due to the concentration of the airflow.

[0089] The circumference of the variable-section air supply duct 2 is connected to the top of the unit fairing 3 on each spinning unit through a hose 5; a throttle valve is provided at the connection between the hose 5 and the circumference of the variable-section air supply duct 2, which is used to adjust the air flow delivered to the unit fairing 3; the cross-sectional areas of all hoses 5 are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct 2, and all hoses 5 are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose 5 is 100mm;

[0090] The cross section of the variable cross-section air supply duct 2 is circular, and the cross-sectional area of ​​the variable cross-sectional air supply duct 2 decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional radius is (1 / n) 1 / 2 , where n is the number of spinning units; the slope of the variable cross-section air supply duct 2 K = r1*(n 1 / 2 -1) / L*(n-1); r1 is the radius of the cross section of the output end of the variable cross-section air supply duct; L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit. The number of hoses 5 is equal to the number of spinning units, both of which are 120;

[0091] During the spinning process, the temperature and humidity in each spinning unit were set to 26±2℃ and 52±2.5% respectively; the fiber was cotton fiber, the yarn linear density was 14.8tex, the yarn evenness was 15%, the number of cotton knots per kilometer (+200%) was 56 / km, the single yarn breaking strength was 19.5cN / tex, the single yarn strength variation coefficient was 8.5%, and the number of yarn defects per 100,000 meters was 5 / 100km.

[0092] like Figure 1As shown, the function of the air conditioning unit 1 is to generate the temperature and humidity air required by the equipment, and the output flow and pressure meet the micro-environment requirements of all spinning units of the equipment; the variable-section air supply duct 2 delivers the temperature and humidity air that meets the standard requirements generated by the air conditioning unit 1 to each spinning unit. The variable-section air supply duct 2 is provided with an insulation layer to ensure that the transmitted air is not affected by the external environment. The variable-section delivery duct ensures that the air flow at the head and tail ends of the multi-spindle spinning unit is basically uniform, and each single spindle outlet is additionally provided with a throttle valve to more accurately adjust the air flow of each spinning unit; the unit fairing 3 is in the equipment The stretching zone forms a microenvironment (temperature: 26°C ± 2°C, humidity: 52 ± 2.5%) to ensure the stability of the temperature and humidity in the stretching zone. At the same time, since the external constant temperature and humidity air is input into the fairing, a slight positive pressure is formed on the outside, preventing external flying flowers and dust from entering the stretching zone; the system control box 4 monitors the temperature, humidity and flow rate in the variable-section air supply duct 2 through the temperature and humidity sensors and speed sensors installed in the variable-section air supply duct 2, and adopts the PID control algorithm to calculate the control output signal according to the deviation of the currently collected temperature, humidity and flow rate from the set value, so as to control the working state of the air-conditioning unit 1.

[0093] Example 2

[0094] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0095] During the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit through a variable cross-section air supply duct. The air conditioner is electrically connected to a system control box. The air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal. The air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0096] An insulation layer is installed on the inner wall of the variable-section air supply duct, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable-section air supply duct; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0097] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit.

[0098] The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing; the cross-sectional areas of all hoses are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct, and all hoses are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose is 100mm;

[0099] The cross section of the variable cross-section air supply duct is circular. The cross-sectional area of ​​the variable cross-sectional air supply duct decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional radius length is (1 / n) 1 / 2 , where n is the number of spinning units; the slope of the variable cross-section air supply duct K = r1*(n 1 / 2 -1) / L*(n-1); r1 is the radius of the cross section of the output end of the variable cross-section air supply duct; L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit. The number of hoses is equal to the number of spinning units, both of which are 120;

[0100] During the spinning process, the temperature and humidity in each spinning unit are set to 28℃±2℃ and 55%±2.5% respectively; the fiber is cellulose fiber, the yarn linear density is 14.8tex, the yarn evenness is 14.5%, the number of cotton knots per kilometer (+200%) is 46 / km, the breaking strength of a single yarn is 11.5cN / tex, the coefficient of variation of single yarn strength is 9%, and the number of yarn defects per 100,000 meters is 11 / 100km.

[0101] Example 3

[0102] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0103] During the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit through a variable cross-section air supply duct. The air conditioner is electrically connected to a system control box. The air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal. The air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0104] An insulation layer is installed on the inner wall of the variable-section air supply duct, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable-section air supply duct; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0105] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit.

[0106] The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing; the cross-sectional areas of all hoses are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct, and all hoses are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose is 100mm;

[0107] The cross section of the variable cross-section air supply duct is a square. The cross-sectional area of ​​the variable cross-sectional air supply duct decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional side length is (1 / n) 1 / 2 , where n is the number of spinning units; the slope K of the variable cross-section air supply duct is K = r1*(n 1 / 2 -1) / L*(n-1); r1 is the side length of the cross section of the variable cross-section air supply duct output end; L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit. The number of hoses is equal to the number of spinning units, both of which are 120;

[0108] During the spinning process, the temperature and humidity in each spinning unit are set to 26±2℃ and 52±2.5% respectively; the fiber is cotton fiber, the yarn linear density is 14.8tex, the yarn evenness is 15%, the number of cotton knots per kilometer (+200%) is 56 / km, the single yarn breaking strength is 20cN / tex, the single yarn strength variation coefficient is 9%, and the number of yarn defects per 100,000 meters is 8 / 100km.

[0109] Example 4

[0110] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0111] During the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit through a variable cross-section air supply duct. The air conditioner is electrically connected to a system control box. The air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal. The air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0112] An insulation layer is installed on the inner wall of the variable-section air supply duct, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable-section air supply duct; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0113] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit.

[0114] The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing; the cross-sectional areas of all hoses are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct, and all hoses are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose is 100mm;

[0115] The cross section of the variable cross-section air supply duct is a square. The cross-sectional area of ​​the variable cross-sectional air supply duct decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional side length is (1 / n) 1 / 2 , where n is the number of spinning units; the slope K of the variable cross-section air supply duct is K = r1*(n 1 / 2 -1) / L*(n-1); r1 is the side length of the cross section of the variable cross-section air supply duct output end; L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit. The number of hoses is equal to the number of spinning units, both of which are 120;

[0116] During the spinning process, the temperature and humidity in each spinning unit were set to 28±2℃ and 58±2.5% respectively; the fiber was polyester fiber, the yarn linear density was 14.8tex, the yarn evenness was 14%, the number of cotton knots per kilometer (+200%) was 25 / km, the single yarn breaking strength was 26cN / tex, the single yarn strength variation coefficient was 9.5%, and the number of yarn defects per 100,000 meters was 12 / 100km.

[0117] Example 5

[0118] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0119] During the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit through a variable cross-section air supply duct. The air conditioner is electrically connected to a system control box. The air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal. The air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0120] An insulation layer is installed on the inner wall of the variable-section air supply duct, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable-section air supply duct; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0121] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit.

[0122] The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing; the cross-sectional areas of all hoses are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct, and all hoses are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose is 100mm;

[0123] The cross section of the variable cross-section air supply duct is rectangular, and the length of the cross section of the variable cross-section air supply duct from the airflow input end to the output end is uniformly reduced, and the gradient rate of the uniformly reduced length is 1 / n, where n is the number of spinning units 120; the slope K of the variable cross-section air supply duct is b1 / L; b1 is the uniformly reduced length of the cross section of the output end of the variable cross-section air supply duct, L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit, and the number of hoses is equal to the number of spinning units, both of which are 120;

[0124] During the spinning process, the temperature and humidity in each spinning unit are set to 28℃±2℃ and 55%±2.5% respectively; the fiber is cellulose fiber, the yarn linear density is 14.8tex, the yarn evenness is 14.07%, the number of cotton knots per kilometer (+200%) is 20 / km, the single yarn breaking strength is 12.9cN / tex, the single yarn strength variation coefficient is 9.5%, and the number of yarn defects per 100,000 meters is 2.7 / 100km.

[0125] Taking viscose fiber (cellulose fiber) with a yarn density of 14.8tex as an example, the temperature is controlled at 28℃±2℃ and the humidity is 55%±2.5%. Compared with the normal environment (temperature 32~36℃, humidity 65%~75%), the yarn quality is shown in the following table:

[0126]

[0127] Example 6

[0128] A spinning method based on a spinning microenvironment system, using a vortex spinning process, the process flow is fiber → cleaning → combing → drawing → vortex spinning → yarn;

[0129] During the spinning process, the constant temperature and humidity airflow generated by the air conditioning unit is delivered to each spinning unit through a variable cross-section air supply duct. The air conditioner is electrically connected to a system control box. The air flow rate and air flow velocity of the constant temperature and humidity airflow delivered to each spinning unit are equal. The air flow rate Q1 is 7.5m 3 / h, air flow velocity is 2m / s;

[0130] An insulation layer is installed on the inner wall of the variable-section air supply duct, and a temperature and humidity sensor and a wind speed sensor are arranged in the variable-section air supply duct; the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively, and when the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity air flow, the system control box controls the air conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity air flow;

[0131] Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate. The guide plate is a porous plate with uniform through holes along the thickness direction. The aperture of the through holes on the guide plate is 3 mm, and the proportion of the through holes is 35%. The fairing body surrounds the drafting area of ​​the spinning unit except the bottom, and the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit.

[0132] The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing; the cross-sectional areas of all hoses are equal and equal to the cross-sectional area of ​​the output end of the variable-section air supply duct, and all hoses are distributed at equal intervals along the length direction of the variable-section air supply duct, and the interval is the spindle pitch L of the spinning unit = 470mm; the diameter of the hose is 100mm;

[0133] The cross section of the variable cross-section air supply duct is rectangular, and the width of the variable cross-section air supply duct decreases uniformly in the cross section from the airflow input end to the output end, and the gradient rate of the uniformly decreasing width is 1 / n, where n is the number of spinning units; the slope K of the variable cross-section air supply duct is b1 / L; b1 is the uniformly decreasing width in the cross section of the output end of the variable cross-section air supply duct, L is the distance between the central axes of two adjacent hoses, that is, the spindle pitch of the spinning unit, and the number of hoses is equal to the number of spinning units, both of which are 120;

[0134] During the spinning process, the temperature and humidity in each spinning unit were set to 28±2℃ and 58±2.5% respectively; the fiber was polyester fiber, the yarn linear density was 14.8tex, the yarn evenness was 13.8%, the number of cotton knots per kilometer (+200%) was 28 / km, the breaking strength of a single yarn was 27cN / tex, the coefficient of variation of single yarn strength was 9.5%, and the number of yarn defects per 100,000 meters was 12 / 100km.

Claims

1. A spinning method based on a spinning microenvironment system, characterized in that: During the spinning process, a constant temperature and humidity airflow is delivered to each spinning unit through a variable cross-section air supply duct, and the airflow volume and airflow velocity delivered to each spinning unit are equal; all spinning units are independently connected to the variable cross-section air supply duct through branch pipes, and the cross-sectional areas of all branch pipes are equal and equal to the cross-sectional area of ​​the output end of the variable cross-sectional air supply duct. All branch pipes are evenly spaced along the length direction of the variable cross-sectional air supply duct, and the spacing is the spindle pitch L of the spinning unit; The cross section of the variable cross-section air supply duct is circular or square. The cross-sectional area of ​​the variable cross-sectional air supply duct decreases uniformly from the airflow input end to the airflow output end, and the gradient rate of the cross-sectional radius or side length is (1 / n) 1 / 2 , where n is the number of spinning units; Alternatively, the cross section of the variable cross-section air supply duct is rectangular, the length or width of the cross section of the variable cross-section air supply duct from the airflow input end to the airflow output end is uniformly reduced, and the gradient rate of the uniformly reduced length or width is 1 / n, where n is the number of spinning units; Each spinning unit is respectively installed with a unit fairing, which consists of a fairing body and a guide plate, the guide plate is a porous plate with uniform through holes opened along the thickness direction, the fairing body surrounds the drafting area of ​​the spinning unit except the bottom, the guide plate is installed inside the fairing body, and the guide plate covers the upper part of the drafting area of ​​the spinning unit; During the spinning process, the temperature fluctuation range in each spinning unit is the set value ±2°C, and the humidity fluctuation range is the set value ±2.5%.

2. A spinning method based on a spinning microenvironment system according to claim 1, characterized in that: A thermal insulation layer is installed on the inner wall of the variable-section air supply duct.

3. A spinning method based on a spinning microenvironment system according to claim 2, characterized in that: All branch pipes are hoses, and the diameter of the hoses is greater than or equal to 100mm.

4. A spinning method based on a spinning microenvironment system according to claim 3, characterized in that: The diameter of the through holes on the guide plate is 2 to 3 mm, and the proportion of the through holes is 30 to 35%.

5. A spinning method based on a spinning microenvironment system according to claim 4, characterized in that: The vortex spinning process is adopted, and the process flow is fiber→blowing→combing→drawing→vortex spinning→yarn.

6. A spinning method based on a spinning microenvironment system according to claim 5, characterized in that: The air flow rate in each spinning unit is 7-8m 3 / h, air flow velocity is less than or equal to 2m / s.

7. A spinning method based on a spinning microenvironment system according to claim 6, characterized in that: When the fiber is cotton fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 26±2℃ and 52±2.5%, respectively, the yarn evenness is ≤15.5%, the number of cotton knots per kilometer (+200%) is ≤60 / km, the single yarn breaking strength is ≥19cN / tex, the single yarn strength variation coefficient is ≤9%, and the yarn defects per 100,000 meters are ≤5 / 100km; When the fiber is cellulose fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 28℃±2℃, 55%±2.5%, the yarn evenness is ≤15%, the number of cotton knots per kilometer (+200%) is ≤50 / km, the single yarn breaking strength is ≥10.5cN / tex, the single yarn strength variation coefficient is ≤10%, and the yarn defects per 100,000 meters are ≤15 / 100km; When the fiber is polyester fiber and the yarn linear density is 14.8tex, the temperature and humidity in each spinning unit during the spinning process are set to 28±2℃ and 58±2.5%, the yarn evenness is ≤15%, the number of cotton knots per kilometer (+200%) is ≤30 / km, the breaking strength of a single yarn is ≥22cN / tex, the coefficient of variation of single yarn strength is ≤10.5%, and the number of yarn defects per 100,000 meters is ≤15 / 100km.

8. A spinning method based on a spinning microenvironment system according to claim 7, characterized in that: The constant temperature and humidity airflow is generated by the air conditioning unit and delivered to the variable cross-section air supply duct; the air conditioner is electrically connected to a system control box, which is used to control the temperature, humidity and wind speed of the constant temperature and humidity airflow generated by the air conditioner.

9. A spinning method based on a spinning microenvironment system according to claim 8, characterized in that: A temperature and humidity sensor and a wind speed sensor are provided in the variable-section air supply duct, and the temperature and humidity sensor and the wind speed sensor are electrically connected to the system control box respectively. When the measured values ​​of the temperature and humidity sensor and the wind speed sensor deviate from the set temperature, humidity and wind speed of the constant temperature and humidity airflow, the system control box controls the air-conditioning unit so that the measured values ​​of the temperature and humidity sensor and the wind speed sensor are respectively the same as the set temperature, humidity and wind speed of the constant temperature and humidity airflow.

10. A spinning method based on a spinning microenvironment system according to claim 9, characterized in that: The circumference of the variable-section air supply duct is connected to the top of the unit fairing on each spinning unit through a hose; a throttle valve is provided at the connection between the hose and the circumference of the variable-section air supply duct to adjust the air flow delivered to the unit fairing.

11. The spinning method based on the spinning microenvironment system according to claim 1, characterized in that: When the cross section of the variable cross section air supply duct is circular or square, the slope K of the variable cross section air supply duct is r1*(n 1 / 2 -1) / L*(n-1); r1 is the radius or side length of the cross section of the output end of the variable cross-section air supply duct, and n is the number of branch pipes; When the cross section of the variable cross-section air supply duct is a rectangle, the slope K=b1 / L; b1 is the uniformly decreasing length or width in the cross section of the output end of the variable cross-section air supply duct, and n is the number of branches.

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