Accurate liquid feeding device for textile finishing link

Abstract

The utility model provides an accurate liquid feeding device for a textile finishing link, the accurate liquid feeding device comprises a liquid inlet pipe, a plurality of liquid feeding flow channels which are horizontally arranged in parallel, a liquid return pipe and a control console, the water inlet ends of the plurality of liquid feeding flow channels are communicated with the liquid inlet pipe, and the water outlet ends of the plurality of liquid feeding flow channels 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] This utility model relates to the field of textile printing and dyeing technology, specifically to a precision liquid dispensing device for textile finishing. Background Technology

[0002] In the textile printing and dyeing finishing process, there are many scenarios that require liquid application to textiles, such as: hand finishing, functional finishing, pre-printing treatment, and pad dyeing. Currently, the industry almost universally uses an immersion-type liquid application method for these scenarios. This involves immersing the textile in a stainless steel tank containing the treatment solution, and then using a high-pressure roller mill to squeeze out the excess liquid before it enters the printing or drying unit. The liquid retention rate of the textile after roller milling varies slightly depending on the yarn material and manufacturing process, generally ranging from 60% to 80%. Most of the liquid remains in the gaps between the yarns and cannot be squeezed out. To reduce the liquid retention rate, the mill pressure is usually increased, but this method is not very effective and can cause wear on the pressure rollers and uneven distribution of the treatment solution across the left, center, and right sides of the textile fabric.

[0003] When textiles with high liquid content enter the drying unit, the excess liquid in the gaps needs to be dried by increasing the temperature of the drying unit and extending the drying time, which increases energy consumption and reduces production efficiency. When textiles with high liquid content enter the printing unit, the excessive liquid will cause the fine patterns to not be clearly displayed. Of course, the industry currently uses rotary screen sizing to achieve "online sizing and wet printing". The principle is also to use the rotary screen to achieve accurate and uniform liquid application, so as to ensure that fine patterns are printed when the textile is wet. However, in this solution, when it is necessary to change the liquid application, a rotary screen with a different mesh number is required, and the liquid content of the textile cannot be changed in real time.

[0004] To address the aforementioned issues in the processing, this solution provides a precise liquid supply device for textile finishing, which can change the liquid content of textiles online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention proposes a precise liquid supply device for textile finishing processes, which can change the liquid content of textiles online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A precision liquid dispensing device for textile finishing includes an inlet pipe, multiple horizontally arranged liquid dispensing channels, a return pipe, and a control console. The inlet ends of the multiple liquid dispensing channels are all connected to the inlet pipe, and the outlet ends of the multiple liquid dispensing channels are all connected to the return pipe. Each liquid dispensing channel has multiple spray holes on its bottom sidewall. A liquid supply pump and a first flow meter are sequentially installed on the inlet pipe, and a second flow meter is installed on the return pipe. A control valve for controlling the on / off state of the liquid dispensing channels is installed at the inlet end of the liquid dispensing channels. The liquid supply pump, the first flow meter, the second flow meter, and the control valve are electrically connected to the control console.

[0008] Preferably, the nozzle has a diversion and merging channel, and the diversion portion of the diversion and merging channel is located on the side close to the inner cavity of the liquid supply channel.

[0009] Preferably, the longitudinal cross-sectional shape of the nozzle is one of the following: tapering, expanding, tapering-expanding, or expanding-tapering.

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

[0011] Preferably, a pressure boosting valve is provided on the 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, the end of the inlet pipe near the liquid supply channel is connected to multiple branch pipes, and the water inlet end of each liquid supply channel is connected to the inlet pipe through a branch pipe, and the control valve is set on the branch pipe.

[0014] The return pipe is connected to multiple manifolds at one end near the supply channel. The inlet end of each supply channel is connected to the return pipe through a manifold.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The liquid supply pump installed on the liquid inlet pipe is electrically connected to the control console. The control console can control the speed of the liquid supply pump according to the real-time liquid carrying rate requirement of the textile. It can change the liquid carrying rate of the textile online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption.

[0017] (2) A first flow meter is installed on the inlet pipe and a second flow meter is installed on the return pipe. The first flow meter can monitor the flow rate of the liquid entering the liquid supply channel, and the second flow meter can monitor the flow rate of the liquid that remains to be recovered after passing through the liquid supply channel. This allows us to obtain the fluctuation of the liquid entering and leaving the liquid supply channel, and thus judge the stability of the amount of liquid sprayed out. This helps to adjust the liquid supply in a timely manner and ensure that the liquid carrying rate of the textile can reach the expected level. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the precise liquid dispensing device in the textile finishing process of this utility model;

[0019] Figure 2 This is a cross-sectional view of the straight cylindrical nozzle in this utility model;

[0020] Figure 3 This is a cross-sectional view of the tapered nozzle in this utility model;

[0021] Figure 4 This is a cross-sectional view of the gradually expanding nozzle in this utility model;

[0022] Figure 5 This is a schematic diagram showing the usage status of the precision liquid dispensing device in the textile finishing process of this utility model.

[0023] Attached image labels:

[0024] 1-Inlet pipe; 2-Supply channel; 21-Spray nozzle; 3-Return pipe; 4-Control console; 5-Supply pump; 6-First flow meter; 7-Second flow meter; 8-Control valve; 9-Storage tank; 10-Pressure booster valve; 11-Diverter branch pipe; 12-Combiner branch pipe; 13-Fabric. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] See Figure 1 and Figure 5 A precision liquid supply device for textile finishing includes an inlet pipe 1, multiple horizontally arranged liquid supply channels 2, a return pipe 3, and a control console 4. The inlet ends of the multiple liquid supply channels 2 are all connected to the inlet pipe 1, and the outlet ends of the multiple liquid supply channels 2 are all connected to the return pipe 3. Each liquid supply channel 2 has multiple spray holes 21 on its bottom sidewall. The inlet pipe 1 is equipped with a liquid supply pump 5 and a first flow meter 6 in sequence, and the return pipe 3 is equipped with a second flow meter 7. The inlet end of the liquid supply channel 2 is equipped with a control valve 8 for controlling the opening and closing of the liquid supply channel 2. 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.

[0028] The liquid supply pump 5 installed on the liquid inlet pipe 1 is electrically connected to the control console 4. The control console 4 can control the speed of the liquid supply pump 5 according to the real-time liquid rate requirement of the textile, and can change the liquid rate of the textile online in real time, thereby ensuring product quality, improving production efficiency, and reducing energy consumption.

[0029] A first flow meter 6 is installed on the inlet pipe 1, and a second flow meter 7 is installed on the return pipe 3. The first flow meter 6 can monitor the flow rate of the liquid entering the liquid supply channel 2, and the second flow meter 7 can monitor the flow rate of the liquid remaining after passing through the liquid supply channel 2. This allows us to obtain the fluctuation of the liquid entering and leaving the liquid supply channel 2, and thus determine the stability of the sprayed liquid volume (i.e., the liquid supply volume). This helps to adjust the liquid supply volume in a timely manner and ensure that the liquid carry-over rate of the textile reaches the expected level.

[0030] Preferred, see Figure 2 The nozzle 21 adopts a cross structure. Specifically, the nozzle 21 has a diversion and confluence channel. The diversion part of the diversion and confluence channel is located on one side close to the inner cavity of the liquid supply channel 2. This cross structure enables the liquid to collide at the confluence point to achieve momentum exchange and violently agitate within the narrow space of the nozzle 21, thereby achieving high-quality atomization of the liquid. This is beneficial for the liquid to be sprayed evenly onto the fabric 13. Therefore, it can reduce the pressure requirements when using pressure rollers for liquid homogenization in the subsequent process, thereby reducing the requirements for the rolling equipment and avoiding problems such as uneven treatment liquid on the left, middle and right sides of the textile fabric.

[0031] Preferred, see Figure 3 The longitudinal cross-sectional shape of nozzle 21 is tapered. This tapered cross-nozzle design results in a larger flow area at the nozzle inlet than at the outlet. This design helps to create a relatively gentle velocity gradient at the nozzle inlet, increasing the static pressure of the liquid and reducing cavitation. This allows for more efficient utilization of the liquid's kinetic energy and increases the initial velocity of the liquid jet. Furthermore, due to the smaller outlet area of ​​the tapered cross-nozzle, the liquid experiences greater pressure as it passes through the nozzle, resulting in more effective atomization. See also... Figure 4The longitudinal cross-sectional shape of the nozzle 21 is gradually expanding. The design of the gradually expanding cross nozzle makes the outlet area of ​​the nozzle larger than the inlet area. The larger outlet area allows 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.

[0032] Preferably, the precision liquid dispensing device further includes a liquid storage tank 9. The outlet of the liquid storage tank 9 is connected to the end of the inlet pipe 1 away from the liquid dispensing channel 2, and the inlet of the liquid storage tank 9 is connected to the end of the return pipe 3 away from the liquid dispensing channel 2. The liquid storage tank 9 supplies liquid to the liquid dispensing channel 2 through the inlet pipe 1, and the liquid leaving the liquid dispensing channel 2 flows back into the liquid storage tank 9 through the return pipe 3 for repeated recycling.

[0033] Preferably, a pressure boosting valve 10 is provided on the inlet pipe 1 and located between the liquid supply pump 5 and the first flow meter 6. The pressure boosting valve 10 can increase the pressure of the liquid, thereby causing the nozzle 21 to spray out fine droplets onto the fabric 13.

[0034] Among them, the control valve 8 is a solenoid valve or a hydraulic valve. Both solenoid valves and hydraulic valves can control the opening and closing of the fluid supply channel 2, and can be selected according to the requirements.

[0035] Preferably, the end of the inlet pipe 1 near the liquid supply channel 2 is connected to multiple branch pipes 11. The water inlet of each liquid supply channel 2 is connected to the inlet pipe 1 through a branch pipe 11. The liquid in the inlet pipe 1 is distributed to each liquid supply channel 2 through the multiple branch pipes 11. The control valve 8 is installed on the branch pipe 11 to avoid affecting the spraying effect if the control valve 8 is installed on the liquid supply channel 2. The end of the return pipe 3 near the liquid supply channel 2 is connected to multiple manifolds 12. The water inlet of each liquid supply channel 2 is connected to the return pipe 3 through a manifold 12. The remaining liquid in each liquid supply channel 2 is collected through the multiple manifolds 12 and collected into the return pipe 3, facilitating liquid recovery. By recovering the remaining liquid, liquid consumption can be effectively reduced.

[0036] This invention also provides a precise liquid application method in the textile finishing process, see [link to relevant documentation]. Figure 5 This method uses the precision liquid dispensing device described above in the textile finishing process and includes the following steps:

[0037] S1: Calculate the liquid delivery rate; different liquid carryover rates correspond to different liquid delivery rates, which can be calculated using the following formula:

[0038] Liquid delivery rate (g / min) = spray width (m) × machine speed (m / min) × weight (g / m 2 ) × Required liquid carryover rate (%).

[0039] Assuming the spray width is 1m, the machine speed is 10m / min, and the weight is 100g / m² 2The required liquid carryover rate is 20%. Substituting these values ​​into the formula, we get:

[0040] Liquid delivery rate = 1m × 10m / min × 100g / m² × 20% = 200g / min

[0041] Therefore, under the given conditions, the liquid delivery rate is 200 grams per minute.

[0042] The liquid delivery volume can be manually calculated and then input into the control console 4; preferably, after the operator inputs the spray width, machine speed, weight and required liquid carry-over rate into the control console 4, the control console 4 automatically calculates the liquid delivery volume according to the formula.

[0043] S2: Control console 4 controls the rotation speed of liquid supply pump 5 according to the liquid supply volume, so that liquid is delivered to liquid supply channel 2 through liquid inlet pipe 1, and sprayed into fabric 13 through nozzle 21. Excess liquid is recovered through liquid supply channel 2 and return pipe 3. When the rotation speed of liquid supply pump 5 increases, the liquid supply volume also increases accordingly; when the rotation speed of liquid supply pump 5 decreases, the liquid supply volume decreases accordingly. Fabric 13 is located directly below nozzle 21, which facilitates liquid spraying.

[0044] S3: Console 4 acquires 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 inlet pipe 1 and the instantaneous flow rate on the return pipe 3. This difference reflects the net increase in the amount of liquid sprayed out by the system relative to the amount of liquid entering the system within a certain period of time.

[0045] S4: Control console 4 determines whether the fluctuation of the instantaneous flow difference exceeds the preset range. If it does, it compensates for the influx of liquid by changing the speed of the supply pump 5 or by controlling more or fewer supply channels by opening and closing the number of control valves 8. The fluctuation of the instantaneous flow difference refers to the fluctuation of the instantaneous flow difference over time. This fluctuation may be caused by various external factors, such as changes in fluid temperature and pressure, changes in pipeline structure, and errors in the measuring equipment itself. Fluctuations within a controllable range do not affect the spraying of liquid. If they exceed the preset range, the device needs to be adjusted. The speed of the supply pump 5 is adjustable, and the number of control valves 8 can be increased or decreased to adjust the number of open and closed supply channels 2. The instantaneous flow difference (ΔQ) is the difference between the instantaneous flow rate (Q_in) of the inlet pipe and the instantaneous flow rate (Q_out) of the return pipe.

[0046] For example, the preset instantaneous flow difference fluctuation range is ±X% (X is a certain set value, such as 5%). Assuming 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.

[0047] If the instantaneous flow difference is detected to be 85 g / min, which is lower than the lower limit of the preset range (95 g / min), it indicates that the amount of liquid sprayed may be insufficient and the flow difference needs to be increased. The system first attempts to increase the flow rate Q_in of the inlet pipe by increasing the speed of the supply pump 5, thereby increasing the flow difference ΔQ. If the flow difference still does not reach the preset range after increasing the speed, and it is determined that the flow rate Q_out of the return pipe is too high (possibly due to system leakage or poor return), then consider closing some control valves 8 to reduce the return flow rate, thereby increasing the flow difference. Assuming that after increasing the speed of the supply pump 5 to 110%, Q_in increases to 110 g / min, while Q_out remains unchanged at 90 g / min, then ΔQ increases by 20 g / min. At this time, the total flow difference is 20 g / min + the original difference (which needs to be calculated according to the specific situation). Further fine-tuning may reach or approach the preset range.

[0048] If the instantaneous flow difference is detected to be 115 g / min, which is higher than the upper limit of the preset range (105 g / min), it indicates that the amount of liquid ejected may be too large, and the flow difference needs to be reduced. The system first attempts to reduce the inlet flow rate Q_in by reducing the speed of the 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 determined that the return flow rate Q_out is too low (possibly due to blockage in the return pipe), then more control valves 8 are considered to be opened to increase the return flow rate, thereby reducing the flow difference. Assuming that after reducing the speed of the supply pump to 90%, Q_in decreases to 90 g / min, while Q_out remains unchanged at 105 g / min (in actual cases, this may vary with the speed reduction; this is a simplified explanation), then the change in ΔQ is -15 g / min (a negative value indicates that the return flow rate is greater than the inlet flow rate; in actual systems, further adjustments may be needed to avoid this situation). At this point, the problem needs to be solved by opening the control valves or checking the return system, and gradually adjusted to the preset range.

[0049] By detecting the flow rate and adjusting the speed of the liquid supply pump according to the instantaneous flow difference, or by controlling the number of liquid supply channels by opening and closing the control valves, it is possible not only to compensate for the stability of the ejected liquid flow rate and ensure the stability of the liquid supply, but also to ensure the response speed, improve the reliability and automation of the device, reduce the errors caused by manual adjustment, and improve the accuracy of liquid supply.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precision liquid dispensing device for textile finishing, characterized in that, The device includes an inlet pipe, multiple horizontally arranged liquid supply channels, a return pipe, and a control console. The inlet ends of the multiple liquid supply channels are connected to the inlet pipe, and the outlet ends of the multiple liquid supply channels are connected to the return pipe. Each liquid supply channel has multiple spray holes on its bottom sidewall. The inlet pipe is equipped with a liquid supply pump and a first flow meter in sequence, and the return pipe is equipped with a second flow meter. The inlet end of each liquid supply channel is equipped with a control valve for controlling the opening and closing of the liquid supply channel. The liquid supply pump, the first flow meter, the second flow meter, and the control valve are electrically connected to the control console.

2. The precision liquid dispensing device for textile finishing as described in claim 1, characterized in that, The nozzle has a flow-diverting and converging channel, and the flow-diverting portion of the flow-diverting and converging channel is located on one side close to the inner cavity of the liquid supply channel.

3. The precision liquid dispensing device for textile finishing as described in claim 2, characterized in that, The longitudinal cross-sectional shape of the nozzle is one of the following: tapering, expanding, tapering-expanding, or expanding-tapering.

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

5. The precision liquid dispensing device for textile finishing as described in claim 1, characterized in that, A pressure boosting valve is provided on the inlet pipe and located between the liquid supply pump and the first flow meter.

6. The precision liquid dispensing device for textile finishing as described in claim 1, characterized in that, The control valve is either a solenoid valve or a hydraulic valve.

7. The precision liquid dispensing device for textile finishing as described in claim 1, characterized in that, The inlet pipe is connected to multiple branch pipes at one end near the liquid supply channel. The inlet end of each liquid supply channel is connected to the inlet pipe through one of the branch pipes. The control valve is installed on the branch pipe. The return pipe is connected to multiple manifolds at one end near the supply channel, and the inlet end of each supply channel is connected to the return pipe through one of the manifolds.

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