Accurate liquid feeding device and method for textile finishing link

Abstract

The invention provides an accurate liquid feeding device and method for a textile finishing link, the accurate liquid feeding device comprises a liquid inlet pipe, a plurality of liquid feeding runners which are horizontally arranged in parallel, a liquid return pipe and a control console, the water inlet ends of the plurality of liquid feeding runners are communicated with the liquid inlet pipe, and the water outlet ends of the plurality of liquid feeding runners are communicated with the liquid return pipe; a plurality of spraying holes are formed in the side wall of the bottom of each liquid feeding flow channel, a liquid feeding pump and a first flow meter are sequentially arranged on the liquid inlet pipe, a second flow meter is arranged on the liquid return pipe, and a control valve used for controlling the liquid feeding flow channels to be opened and closed is arranged at the water inlet ends of the liquid feeding flow channels; the control console can control the rotating speed of the liquid supply pump according to the real-time liquid carrying rate requirement of the textile, the liquid carrying rate of the textile can be changed online in real time, fluctuation of liquid entering and leaving the liquid supply flow channel is obtained through the first flow meter and the second flow meter, then the stability of the sprayed liquid amount is judged, the liquid supply amount can be adjusted in time, and the quality of the textile is improved. And the liquid carrying rate of the textile can reach the expectation.

Description

Technical Field

[0001] The present invention relates to the technical field of textile printing and dyeing, and in particular to a precise liquid feeding device and method for a textile finishing process. Background Art

[0002] In the process of textile printing and dyeing, there are many scenarios where textiles need to be liquid-fed, such as: hand finishing, functional finishing, pre-printing treatment, roller dyeing, etc. At present, the practical equipment in the above scenarios in the industry almost all adopts the immersion liquid feeding method, that is, the textile is immersed in a stainless steel tank filled with treatment liquid, and then the excess liquid is squeezed out through a high-pressure roller mill, and then enters the printing or drying unit. The liquid rate of the textile after the roller mill is rolled varies slightly depending on the yarn material and manufacturing process. The general liquid rate is in the range of 60%-80%, and most of the liquid exists in the gaps between the yarns and cannot be squeezed out. If the liquid rate is to be reduced, it is usually achieved by increasing the mill pressure, but this method is not effective in reducing the liquid rate, and it will cause problems such as wear of the equipment roller and uneven treatment liquid on the left, middle and right sides of the textile.

[0003] When textiles with high liquid carryover rate enter the drying unit, the excess liquid in the gaps needs to be dried by increasing the temperature of the drying unit and increasing the drying time, which increases energy consumption and reduces production efficiency; when textiles with high liquid carryover rate enter the printing unit, the fine patterns cannot be clearly presented due to excessive liquid. Of course, the industry currently also uses round screen sizing to achieve "online sizing, wet printing", and its principle is also to use the round screen method to achieve accurate and uniform liquid supply, ensuring that fine patterns are printed when the textile is wet. However, in this solution, when the liquid supply amount needs to be changed, the round screen with different mesh sizes needs to be replaced to achieve this, and the liquid carryover rate of the textile cannot be changed in real time.

[0004] In order to solve the above problems in the processing process, the present invention provides a precise liquid feeding device and method for the textile finishing process, which can realize online real-time change of the liquid carrying rate of the textile, thereby ensuring product quality, improving production efficiency, and reducing energy consumption. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a precise liquid feeding device and method for the textile finishing process, which can change the liquid carrying rate of the textile online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption.

[0006] The technical solution of the present invention is achieved in this way:

[0007] The present invention provides a precise liquid feeding device for a textile finishing link, comprising a liquid inlet pipe, a plurality of liquid feeding channels arranged horizontally in parallel, a liquid return pipe and a control console, the water inlet ends of the plurality of liquid feeding channels are all connected to the liquid inlet pipe, the water outlet ends of the plurality of liquid feeding channels are all connected to the liquid return pipe, a plurality of spray holes are arranged on the bottom side wall of each liquid feeding channel, a liquid supply pump and a first flow meter are sequentially arranged on the liquid inlet pipe, a second flow meter is arranged on the liquid return pipe, a control valve for controlling the on-off of the liquid feeding channel is arranged at the water inlet end of the liquid feeding channel, and the liquid supply pump, the first flow meter, the second flow meter and the control valve are electrically connected to the control console respectively.

[0008] Preferably, the spray hole has a flow-dividing and merging channel, and the flow-dividing part of the flow-dividing and merging channel is arranged on a side close to the inner cavity of the liquid supply channel.

[0009] Preferably, the longitudinal cross-sectional shape of the nozzle hole is one of a gradually converging type, a gradually expanding type, a gradually converging and gradually expanding type, or a gradually expanding and gradually converging type.

[0010] Preferably, it also includes a liquid storage tank, the outlet of which is connected to the end of the liquid inlet pipe away from the liquid supply channel, and the inlet of which is connected to the end of the liquid return pipe away from the liquid supply channel.

[0011] Preferably, a boosting valve is provided on the liquid inlet pipe and located between the liquid supply pump and the first flow meter.

[0012] Preferably, the control valve is a solenoid valve or a hydraulic valve.

[0013] Preferably, one end of the liquid inlet pipe close to the liquid supply channel is connected to a plurality of branch pipes, the water inlet end of each liquid supply channel is connected to the liquid inlet pipe through a branch pipe, and the control valve is arranged on the branch pipe;

[0014] One end of the liquid return pipe close to the liquid supply channel is connected to a plurality of converging branch pipes, and the water inlet end of each liquid supply channel is connected to the liquid return pipe through a converging branch pipe.

[0015] On the other hand, the present invention also provides a method for precise liquid feeding in a textile finishing process, which method is performed using any of the precise liquid feeding devices for a textile finishing process described above, and comprises the following steps:

[0016] S1: Calculate the amount of fluid to be given;

[0017] S2: The control console controls the speed of the liquid supply pump according to the liquid supply amount, so that the liquid is transported to the liquid supply channel through the liquid inlet pipe, and small droplets are sprayed onto the fabric through the spray hole. The excess liquid passes through the liquid supply channel and is recovered through the return pipe;

[0018] S3: The control console obtains the instantaneous flow rates of the first flow meter and the second flow meter, and calculates the instantaneous flow rate difference between the first flow meter and the second flow meter;

[0019] S4: The control console determines whether the fluctuation of the instantaneous flow difference exceeds the preset range. If so, it compensates for the stability of the sprayed liquid flow by changing the rotation speed of the liquid supply pump or by opening and closing the number of control valves to control more or less liquid supply channels.

[0020] Preferably, the amount of liquid to be administered is calculated according to the following formula:

[0021] Liquid supply amount = spray width × machine speed × gram weight × required liquid rate.

[0022] Preferably, after the operator inputs the spray width, machine speed, gram weight and required liquid carrying rate into the console, the console automatically calculates the liquid supply amount according to the formula.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The liquid supply pump provided on the liquid inlet pipe is electrically connected to the control console, and the control console can control the speed of the liquid supply pump according to the real-time liquid carrying rate requirement of the textile, and can change the liquid carrying rate of the textile online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption;

[0025] (2) A first flow meter is provided on the liquid inlet pipe, and a second flow meter is provided on the liquid return pipe. The first flow meter can monitor the flow rate of liquid entering the liquid supply channel, and the second flow meter can monitor the flow rate of liquid remaining after passing through the liquid supply channel. Thus, the fluctuation of liquid entering and leaving the liquid supply channel can be obtained, and then the stability of the amount of liquid sprayed can be judged, which helps to adjust the liquid supply amount in time and ensure that the liquid carrying rate of the textile can reach the expected level.

[0026] (3) By calculating the instantaneous flow difference between the first flow meter and the second flow meter, and determining whether the fluctuation of the instantaneous flow difference exceeds a preset range, if exceeded, the stability of the sprayed liquid flow rate is compensated by changing the rotation speed of the liquid supply pump or by opening and closing the number of control valves to control more or less liquid supply channels, thereby ensuring that the sprayed liquid flow rate is consistent with the calculated liquid supply amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the precise liquid feeding device in the textile finishing process of the present invention;

[0028] Figure 2 is a cross-sectional view of a straight-cylinder-type spray hole in the present invention;

[0029] Figure 3 is a cross-sectional view of the tapered nozzle hole in the present invention;

[0030] Figure 4 is a cross-sectional view of the gradually expanding nozzle hole in the present invention;

[0031] Figure 5This is a schematic diagram of the use status of the precise liquid feeding device in the textile finishing process of the present invention.

[0032] Figure ID:

[0033] 1-liquid inlet pipe; 2-liquid supply channel; 21-spray hole; 3-liquid return pipe; 4-control console; 5-liquid supply pump; 6-first flow meter; 7-second flow meter; 8-control valve; 9-liquid storage tank; 10-boosting valve; 11-diversion branch pipe; 12-converging branch pipe; 13-fabric. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1 and Figure 5 A precise liquid feeding device for a textile finishing link comprises a liquid inlet pipe 1, a plurality of liquid feeding channels 2 arranged horizontally in parallel, a liquid return pipe 3 and a control console 4, the water inlet ends of the plurality of liquid feeding channels 2 are all connected to the liquid inlet pipe 1, the water outlet ends of the plurality of liquid feeding channels 2 are all connected to the liquid return pipe 3, a plurality of spray holes 21 are arranged on the bottom side wall of each liquid feeding channel 2, a liquid supply pump 5 and a first flow meter 6 are arranged on the liquid inlet pipe 1 in sequence, a second flow meter 7 is arranged on the liquid return pipe 3, a control valve 8 for controlling the on-off of the liquid feeding channel 2 is arranged at the water inlet end of the liquid feeding channel 2, and the liquid supply pump 5, the first flow meter 6, the second flow meter 7 and the control valve 8 are electrically connected to the control console 4 respectively.

[0037] The liquid supply pump 5 provided on the liquid inlet pipe 1 is electrically connected to the control console 4. The control console 4 can control the rotation speed of the liquid supply pump 5 according to the real-time liquid carrying rate requirement of the textile, and can change the liquid carrying rate of the textile online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption;

[0038] A first flow meter 6 is provided on the liquid inlet pipe 1, and a second flow meter 7 is provided on the liquid return pipe 3. The first flow meter 6 can monitor the liquid flow entering the liquid supply channel 2, and the second flow meter 7 can monitor the liquid flow remaining after passing through the liquid supply channel 2 and being recovered, so as to obtain the liquid fluctuations entering and leaving the liquid supply channel 2, and then judge the stability of the sprayed liquid amount (i.e., the liquid supply amount), which helps to adjust the liquid supply amount in time and ensure that the liquid carrying rate of the textile can reach the expected level.

[0039] Preferably, see Figure 2 The spray hole 21 adopts a cross structure. Specifically, the spray hole 21 has a diversion and confluence channel. The diversion part of the diversion and confluence channel is arranged on a side close to the inner cavity of the liquid feeding channel 2. This cross structure can make the liquid collide at the confluence to achieve momentum exchange, and violently disturb in the narrow space of the spray hole 21, so as to achieve high-quality atomization of the liquid, which is conducive to the uniform spraying of the liquid onto the fabric 13. Therefore, the pressure requirement when using a pressure roller to homogenize the liquid in the subsequent process can be reduced, thereby reducing the requirements for the rolling equipment, and avoiding the problems of uneven treatment liquid on the left, middle and right sides of the textile width.

[0040] Preferably, see Figure 3 The longitudinal cross-section of the nozzle 21 is tapered. The design of the tapered cross nozzle makes the flow area at the nozzle inlet larger than that at the nozzle outlet. This design helps to form a relatively gentle velocity gradient at the nozzle inlet, increase the static pressure of the liquid, and reduce the occurrence of cavitation, so that the kinetic energy of the liquid can be more effectively utilized and the initial velocity of the liquid injection can be increased. Moreover, since the outlet area of ​​the tapered cross nozzle is smaller, the liquid will be subjected to greater pressure when passing through the nozzle, so that it can be more effectively atomized. Figure 4 The longitudinal cross-sectional shape of the nozzle hole 21 is gradually expanding. The design of the gradually expanding cross nozzle hole makes the outlet area of ​​the nozzle hole larger than the inlet. The larger outlet area enables the liquid to be better dispersed and covered during spraying. This uniform spray effect helps the liquid to be more evenly distributed on the fabric 13.

[0041] Preferably, the precise liquid feeding device further comprises a liquid storage tank 9, the outlet of the liquid storage tank 9 is connected to the end of the liquid inlet pipe 1 away from the liquid feeding channel 2, and the inlet of the liquid storage tank 9 is connected to the end of the liquid return pipe 3 away from the liquid feeding channel 2. The liquid storage tank 9 supplies liquid to the liquid feeding channel 2 through the liquid inlet pipe 1, and the liquid leaving the liquid feeding channel 2 flows back to the liquid storage tank 9 through the liquid return pipe 3 for repeated recycling.

[0042] Preferably, a booster valve 10 is provided on the liquid inlet pipe 1 and between the liquid supply pump 5 and the first flow meter 6 . The setting of the booster valve 10 can increase the pressure of the liquid, so that the spray hole 21 sprays fine droplets onto the fabric 13 .

[0043] The control valve 8 is a solenoid valve or a hydraulic valve, and both the solenoid valve and the hydraulic valve can control the on-off of the liquid supply channel 2, and can be selected according to the needs.

[0044] Preferably, the end of the liquid inlet pipe 1 close to the liquid supply channel 2 is connected to a plurality of branch pipes 11, and the water inlet end of each liquid supply channel 2 is connected to the liquid inlet pipe 1 through a branch pipe 11, and the liquid in the liquid inlet pipe 1 is diverted to each liquid supply channel 2 through the plurality of branch pipes 11, and the control valve 8 is arranged on the branch pipe 11 to avoid the control valve 8 being arranged on the liquid supply channel 2 and affecting the liquid spraying effect; the end of the liquid return pipe 3 close to the liquid supply channel 2 is connected to a plurality of converging branch pipes 12, and the water inlet end of each liquid supply channel 2 is connected to the liquid return pipe 3 through a converging branch pipe 12, and the remaining liquid of each liquid supply channel 2 is collected through the plurality of converging branch pipes 12 and converged to the liquid return pipe 3, so as to facilitate the recovery of the liquid. By recovering the remaining liquid, the consumption of the liquid can be effectively reduced.

[0045] The present invention also provides a precise liquid feeding method for textile finishing, see Figure 5 The method is carried out using the above-mentioned precise liquid feeding device in the textile finishing process, and comprises the following steps:

[0046] S1: Calculate the amount of liquid to be supplied; different liquid carrying rates correspond to different amounts of liquid to be supplied, wherein the amount of liquid to be supplied can be calculated according to the following formula:

[0047] Liquid supply (g / min) = spray width (m) × machine speed (m / min) × gram weight (g / m 2 )×required liquid carrying rate (%).

[0048] Assume the spray width is 1m, the machine speed is 10m / min, and the weight is 100g / m 2 , the required liquid carryover is 20%, substituting these values ​​into the formula, we obtain:

[0049] Liquid supply = 1m × 10m / min × 100g / ㎡ × 20% = 200g / min,

[0050] Therefore, under the given conditions, the amount of fluid delivered per minute is 200 grams.

[0051] The liquid supply amount can be input into the control console 4 after manual calculation; preferably, after the operator inputs the spray width, machine speed, gram weight and required liquid carrying rate into the control console 4, the control console 4 automatically calculates the liquid supply amount according to the formula.

[0052] S2: The control console 4 controls the rotation speed of the liquid supply pump 5 according to the liquid supply amount, so that the liquid is transported to the liquid supply channel 2 through the liquid inlet pipe 1, and fine liquid droplets are sprayed to the fabric 13 through the spray hole 21. The excess liquid passes through the liquid supply channel 2 and is recovered through the liquid return pipe 3; when the rotation speed of the liquid supply pump 5 increases, the liquid supply amount also increases accordingly; when the rotation speed of the liquid supply pump 5 decreases, the liquid supply amount decreases accordingly; the fabric 13 is located directly below the spray hole 21, which is convenient for spraying the liquid;

[0053] S3: The control console 4 obtains the instantaneous flow rate measured by the first flow meter 6 and the instantaneous flow rate measured by the second flow meter 7, and calculates the instantaneous flow rate difference between the first flow meter 6 and the second flow meter 7. The instantaneous flow rate difference refers to the difference between the instantaneous flow rate on the liquid inlet pipe 1 and the instantaneous flow rate on the liquid return pipe 3. This difference reflects the net increase in the amount of liquid sprayed out of the system relative to the amount of liquid entering the system within a certain period of time;

[0054] S4: The control console 4 determines whether the fluctuation of the instantaneous flow difference exceeds the preset range. If it exceeds, the stability of the sprayed liquid flow is compensated by changing the rotation speed of the liquid supply pump 5 or by opening and closing the number of control valves 8 to control more or less liquid supply channels. The fluctuation of the instantaneous flow difference refers to the fluctuation of the instantaneous flow difference over time. This fluctuation may be caused by a variety of external factors, such as changes in fluid temperature and pressure, changes in pipeline structure, and errors in the measuring equipment itself. The fluctuation does not affect the spraying of the liquid within a controllable range. If it exceeds the preset range, the device needs to be adjusted. The rotation speed of the liquid supply pump 5 can be adjusted, and the number of control valves 8 can be increased or decreased to adjust the number of on-off switches of the liquid supply channel 2. The instantaneous flow difference (ΔQ) is the difference between the instantaneous flow of the inlet pipe (Q_in) and the instantaneous flow of the return pipe (Q_out);

[0055] For example, the preset instantaneous flow difference fluctuation range is ±X% (X is a certain set value, such as 5%), assuming that the rated instantaneous flow difference is 100g / min (i.e. Q_in-Q_out=100g / min), then the allowable instantaneous flow difference fluctuation range is 95g / min to 105g / min;

[0056] If the monitored instantaneous flow difference is 85g / min, it is lower than the lower limit of the preset range (95g / min), indicating that the amount of sprayed liquid may be insufficient and the flow difference needs to be increased. The system first attempts to increase the liquid inlet pipe flow Q_in by increasing the rotation speed of the liquid supply pump 5, thereby increasing the flow difference ΔQ. If the flow difference still does not reach the preset range after increasing the rotation speed, and it is judged that the return pipe flow Q_out is too high (possibly due to system leakage or poor return liquid), consider closing part of the control valve 8 to reduce the return liquid flow, thereby increasing the flow difference. Assuming that after increasing the rotation speed of the liquid supply pump 5 to 110%, Q_in increases to 110g / min, while Q_out remains unchanged at 90g / min, then ΔQ increases by 20g / min. At this time, the total flow difference is 20g / min + original difference (needs to be calculated according to the specific situation), and further fine-tuning may reach or approach the preset range.

[0057] If the instantaneous flow difference is monitored to be 115g / min, it is higher than the upper limit of the preset range (105g / min), indicating that the amount of liquid sprayed may be too much and the flow difference needs to be reduced. The system first attempts to reduce the flow rate Q_in of the liquid inlet pipe by reducing the speed of the liquid supply pump 5, thereby reducing the flow difference ΔQ. If the flow difference still does not drop to the preset range after reducing the speed, and it is judged that the return pipe flow Q_out is too low (possibly due to blockage of the return pipe), consider opening more control valves 8 to increase the return flow, thereby reducing the flow difference. Assuming that after reducing the speed of the liquid supply pump to 90%, Q_in is reduced to 90g / min, and Q_out remains unchanged at 105g / min (in actual circumstances, it may change with the reduction of the speed, here is a simplified explanation), then the change value of ΔQ is -15g / min (a negative value indicates that the return flow is greater than the inlet flow, and further adjustments may be required in the actual system to avoid this situation). At this time, it is necessary to solve the problem by opening the control valve or checking the return system, and gradually adjust it to the preset range.

[0058] By detecting the flow rate and changing the rotation speed of the liquid supply pump according to the instantaneous flow difference or controlling more or fewer liquid supply channels by opening and closing the number of control valves, not only can the stability of the sprayed liquid flow be compensated and the stability of liquid supply be ensured, but also the response speed can be ensured, the reliability and automation of the device can be improved, the error caused by manual adjustment can be reduced, and it is beneficial to improve the accuracy of liquid supply.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precise liquid feeding device for textile finishing, characterized in that: It includes a liquid inlet pipe, a plurality of liquid supply channels arranged horizontally in parallel, a liquid return pipe and a control console, the water inlet ends of the plurality of liquid supply channels are connected to the liquid inlet pipe, the water outlet ends of the plurality of liquid supply channels are connected to the liquid return pipe, a plurality of spray holes are provided on the bottom side wall of each of the liquid supply channels, the liquid inlet pipe is provided with a liquid supply pump and a first flow meter in sequence, the liquid return pipe is provided with a second flow meter, the water inlet end of the liquid supply channel is provided with a control valve for controlling the on-off of the liquid supply channel, and the liquid supply pump, the first flow meter, the second flow meter and the control valve are electrically connected to the control console respectively.

2. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: The spray hole has a flow-dividing and merging channel, and the flow-dividing part of the flow-dividing and merging channel is arranged on a side close to the inner cavity of the liquid supply channel.

3. The precise liquid feeding device for textile finishing according to claim 2, characterized in that: The longitudinal cross-sectional shape of the spray hole is one of a gradually contracting type, a gradually expanding type, a gradually contracting and gradually expanding type, or a gradually expanding and gradually contracting type.

4. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: It also includes a liquid storage tank, the outlet of which is connected to one end of the liquid inlet pipe away from the liquid supply channel, and the inlet of which is connected to one end of the liquid return pipe away from the liquid supply channel.

5. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: A boost valve is provided on the liquid inlet pipe and between the liquid supply pump and the first flow meter.

6. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: The control valve is a solenoid valve or a hydraulic valve.

7. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: One end of the liquid inlet pipe close to the liquid supply channel is connected to a plurality of branch pipes, the water inlet end of each liquid supply channel is connected to the liquid inlet pipe through one branch pipe, and the control valve is arranged on the branch pipe; One end of the liquid return pipe close to the liquid supply channel is connected to a plurality of confluence pipes, and the water inlet end of each of the liquid supply channels is connected to the liquid return pipe through one of the confluence pipes.

8. A precise liquid feeding method for textile finishing, characterized in that: The method is carried out using the precise liquid feeding device for textile finishing as described in any one of claims 1 to 7, comprising the following steps: S1: Calculate the amount of fluid to be given; S2: The control console controls the rotation speed of the liquid supply pump according to the liquid supply amount, so that the liquid is transported to the liquid supply channel through the liquid inlet pipe, and fine droplets are sprayed to the fabric through the spray hole, and the excess liquid passes through the liquid supply channel and is recovered through the return pipe; S3: the control console obtains the instantaneous flow rates of the first flow meter and the second flow meter, and calculates the instantaneous flow rate difference between the first flow meter and the second flow meter; S4: The control console determines whether the fluctuation of the instantaneous flow difference exceeds a preset range. If so, the control console compensates for the stability of the sprayed liquid flow by changing the rotation speed of the liquid supply pump or by opening and closing the number of control valves to control more or less liquid supply channels.

9. The precise liquid feeding device for textile finishing according to claim 1, characterized in that: The amount of liquid to be fed is calculated according to the following formula: Liquid supply amount = spray width × machine speed × gram weight × required liquid rate.

10. The precise liquid feeding device for textile finishing according to claim 9, characterized in that: After the operator inputs the spray width, machine speed, gram weight and required liquid carrying rate into the console, the console automatically calculates the liquid supply amount according to the formula.

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