Water-saving printing and dyeing device and process for polyester fabric

Abstract

The invention discloses a polyester fabric water-saving printing and dyeing device and process, and particularly relates to the technical field of fabric dyeing, the polyester fabric water-saving printing and dyeing device comprises a dyeing tank, a twisting device movably arranged in the dyeing tank and comprising a protection part, a rotating shell and a conveying belt, and a pressure adjusting part, the protective part is movably arranged in the rotary shell and comprises a piston rod and a movable protrusion, and when the moving distance of the protective part to the center is increased, the piston rod moves upwards to drive the movable protrusion to move outwards and increase the extrusion force with the conveying belt; the overflow pipe is movably arranged above the rotating shell, one side of the overflow pipe communicates with a liquid outlet pipe through a flow adjusting part, and the flow adjusting part comprises a flow baffle; through the action of the twisting device, the fabric is untwisted before entering the overflow pipe, and the situation that the fabric enters the overflow pipe in a twisted state, consequently, dye liquor cannot be completely absorbed, and dyeing is uneven is avoided.

Description

Technical Field

[0001] This invention relates to the field of fabric dyeing technology, specifically a water-saving dyeing device and process for polyester fabrics. Background Technology

[0002] Typical processes in the fabric printing and dyeing industry include overflow dyeing, gas-liquid split dyeing, and airflow atomization dyeing. The gas-liquid overflow dyeing machine is the mainstream intermittent dyeing equipment in the textile printing and dyeing field. It integrates three major technical paths: airflow conveying, overflow dyeing, and jet dyeing. Its core advantages are low tension, low liquor ratio, high efficiency and even dyeing, energy saving and environmental protection. It is suitable for dyeing and processing easily deformable fabrics such as knitted fabrics, elastic fabrics, and chemical fiber blended fabrics.

[0003] CN117306149B discloses an overflow dyeing machine with uniform dyeing temperature, which relates to the technical field of dyeing machines. It includes an overflow dyeing machine body and a heat exchanger installed on the body. The dye liquor enters the body after being heated by the heat exchanger. An overflow pipe is installed on the body. The high-temperature dye liquor heated by the heat exchanger overflows repeatedly in the overflow pipe.

[0004] In the above scheme, the fabric is prone to twisting during the conveying process before entering the overflow pipe, which prevents it from fully absorbing the dye liquor in the overflow pipe, thus causing uneven overflow dyeing in the subsequent process.

[0005] Existing fixing and protective components cannot be adapted to fabrics with different degrees of twist, and the contact area between the protective components and fabrics with different degrees of twist cannot be adaptively adjusted. Therefore, the fabric is easily damaged and the untwisting effect is insufficient during the untwisting process.

[0006] When the fabric twists more, the required twisting force also increases. If the conveyor belt and the rotating shell are in a wet environment, the clamping force between the conveyor belt and the rotating shell will be insufficient and slippage will occur, affecting the untwisting effect.

[0007] Fabrics with different degrees of twist have different requirements for dye absorption, and the size of the existing outlet pipe opening cannot be flexibly adjusted, resulting in uneven dyeing.

[0008] Fabrics are prone to edge curling during transport. Existing devices cannot specifically untwist the curled areas, resulting in incomplete untwist and affecting dyeing quality.

[0009] Furthermore, gaps are prone to appear at the joints of the fabric during the cyclic dyeing process. If a large flow of dye liquor washes over the joints in the overflow pipe, the gaps may widen. Also, when the fabric breaks, the broken part falls back into the storage pipe, causing the fabric to become knotted in the storage pipe, making it impossible to accurately locate the break and quickly resume work. Summary of the Invention

[0010] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a water-saving dyeing and printing device and process for polyester fabrics to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a water-saving dyeing and printing device for polyester fabric, comprising a dyeing tank, and further comprising: The twisting device, which is movably installed inside the dyeing tank, includes a protective component, a rotating housing, and a conveyor belt. The rotating housing drives the protective component to rotate and untwist the fabric. The pressure regulating part, which is movably disposed inside the rotating housing, includes a piston rod and a movable protrusion. When the protective part moves a greater distance toward the center position, the piston rod moves upward, causing the movable protrusion to move outward and increasing the squeezing force with the conveyor belt. An overflow pipe is movably mounted above the rotating outer shell. One side of the overflow pipe is connected to an outlet pipe through a flow regulating part. The flow regulating part includes a baffle plate. The piston rod drives the baffle plate to move upward and reduce the blockage area on the outlet pipe, thereby increasing the amount of dye liquid entering the overflow pipe along the outlet pipe.

[0012] Preferably, the torsion device further includes: The drive motor is fixedly installed outside the dyeing tank, and its output end is movably connected to the conveyor belt through the turntable. The drive motor drives the rotating outer shell to rotate through the conveyor belt. The detector, which is fixedly installed at the bottom of the rotating housing, is used to detect the state of the fabric when it reaches the inside of the rotating housing.

[0013] Preferably, the torsion device further includes: The mounting cavities are evenly distributed on the sidewalls of the rotating housing. The upper telescopic component is fixedly installed inside the mounting cavity, and its output end is hinged to the upper end of the protective component to drive the upper end of the protective component to move. The lower telescopic component is fixedly installed inside the mounting cavity, and its output end is hinged to the lower end of the protective component to drive the lower end of the protective component to move.

[0014] Preferably, the pressure regulating unit includes: A movable piston is fixedly installed at the output end of the upper telescopic component, and the outer surface of the movable piston is movably and sealingly connected to the inner wall of the mounting cavity, used to move and compress the gas in the mounting cavity; A fixed piston is fixedly installed in the mounting cavity near the output end of the upper telescopic component, and the inner wall of the fixed piston is movably and sealingly connected to the outer surface of the upper telescopic component.

[0015] Preferably, the pressure regulating unit further includes: The sliding cavity is located inside the rotating housing. The top of the sliding cavity is connected to the outside, and the bottom is connected to the mounting cavity through a channel. The hydraulic chamber is located inside the rotating outer shell and is connected to the side wall of the sliding chamber via a pipe on one side. The movable protrusion is movably connected inside the hydraulic chamber.

[0016] Preferably, the flow regulating unit further includes: The movable plate is movably positioned at the bottom of the overflow pipe, with the bottom of the movable plate contacting the top of the piston rod; The docking hole is located inside the baffle plate and has the same size as the liquid outlet pipe. When the baffle plate moves, it causes the docking hole to move and changes the overlapping area with the liquid outlet pipe.

[0017] Preferably, the rotating outer shell is movably connected to the inside of the dyeing tank. After the fabric is untwisted inside the rotating outer shell, it enters the overflow pipe upward for overflow dyeing. The piston rod is sealed and slidably disposed inside the sliding cavity. The protective component moves a greater distance toward the center position, and the piston rod moves a greater distance upward.

[0018] Preferably, the conveyor belt is movably connected to the outer surface of the rotating housing and presses against the movable protrusion. The rotation of the conveyor belt drives the rotating housing to rotate through the movable protrusion and untwistles the fabric. The baffle is fixedly set above the movable plate on the side near the liquid outlet pipe. When the piston rod moves upward, it drives the baffle to move upward through the movable plate.

[0019] A water-saving dyeing process for polyester fabric, wherein the water-saving dyeing process utilizes the water-saving dyeing device for polyester fabric as described in claim 1, and includes the following steps: S1: The fabric enters the rotating shell upwards for untwisting, and after untwisting, it continues to enter the overflow pipe for overflow dyeing. S2: When the fabric twist increases, the protective part moves closer to the fabric end, the piston rod moves upward, the movable protrusion moves outward and increases the clamping force with the conveyor belt, the conveyor belt drives the rotating shell to rotate, the torque increases, the piston rod drives the baffle plate to move upward and increases the opening of the liquid outlet pipe. S3: When a gap appears at the fabric joint, the protective part moves away from the fabric end, the piston rod moves up less, the movable protrusion moves inward and disengages from the conveyor belt clamping force, the rotating shell does not rotate, and the piston rod drives the baffle plate to move down and reduces the opening of the liquid outlet pipe. S4: When the fabric breaks, multiple protective components move to the maximum distance towards the fabric end and clamp the broken position. The piston rod moves up to the maximum distance and drives the baffle plate to block the liquid outlet pipe, and the conveyor belt stops driving.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention uses the action of the twisting device to untwist the fabric before it enters the overflow pipe, so as to avoid the fabric entering the overflow pipe in a twisted state, which would result in the fabric not being able to fully absorb the dye liquor and causing uneven dyeing.

[0021] 2. The present invention uses the upper and lower telescopic components to drive the protective component to move synchronously. The greater the degree of twist, the greater the moving length of the telescopic component, so that the protective component can contact the fabric and untwist, avoiding damage to the fabric with different degrees of twist when the fixed protective component is untwisted.

[0022] 3. This invention adjusts the angle of the protective component by varying the moving lengths of the upper and lower telescopic components according to different degrees of torsion. This increases the contact area between the protective component and the fabric, thereby reducing the pressure on the fabric when the protective component rotates, and preventing untwisting failure and fabric damage caused by excessive untwisting force.

[0023] 4. This invention uses the upper telescopic component to move and compress the gas in the mounting cavity, thereby causing the piston rod to move upward and squeeze the medium in the sliding cavity into the hydraulic cavity, thus pushing out the movable protrusion. This increases the pressing area and pressing force between the conveyor belt and the rotating shell, adapting to the increased rotation degree requiring greater torsional force, and preventing slippage between the conveyor belt and the rotating shell.

[0024] 5. This invention uses the extension and retraction of the upper telescopic component to compress and release the gas in the installation cavity, thereby causing the piston rod to move up and down and drive the flow regulating part to adjust the opening size of the liquid outlet pipe, thus adapting to the absorption of dye liquor for fabrics with different degrees of twist, avoiding the problem of uneven dyeing caused by dye liquor with a large degree of twist not being fully absorbed in the overflow pipe.

[0025] 6. The present invention uses different extension lengths of different telescopic components. When the fabric has curled edges, the extension of the telescopic component at the curled part causes the protective component to extend and contact the twisted part. By rotating the outer shell, the protective component causes the curled part of the fabric to untwist.

[0026] 7. The present invention uses a torsion device to drive the flow regulating part to regulate the flow so that the flow matches the connector when it reaches the overflow pipe. When the fabric breaks, the protective part extends to the maximum distance to close the outlet pipe and clamp the broken position, which facilitates finding the connector for rework. At the same time, it avoids the fabric from twisting and knotting in the storage pipe. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the overall structure of the present invention from a first-view perspective; Figure 2 This is a three-dimensional structural diagram of the overall structure of the present invention from a second perspective; Figure 3 This is a schematic diagram of the side cross-sectional structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the torsion device of the present invention; Figure 5 This is a side cross-sectional view of the torsion device of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a three-dimensional structural diagram of the flow regulating unit of the present invention in its initial state; Figure 8 This is a three-dimensional structural diagram of the protective component of the present invention from a second angle.

[0028] The attached diagram is labeled as follows: 1. Dyeing tank; 2. Dye tank; 3. Main feed pipe; 4. Secondary feed pipe; 5. Pressure supply pipe; 6. Air pressure chamber; 7. Shaking hopper; 8. Conveying unit; 9. Torsion device; 901. Drive motor; 902. Conveyor belt; 903. Rotating outer shell; 904. Protective component; 905. Mounting cavity; 906. Upper telescopic component; 907. Lower telescopic component; 908. Detector; 10. Discharge unit; 11. Discharge port; 12. Overflow pipe; 13. Liquid outlet pipe; 14. Pressure regulating unit; 1401. Moving piston; 1402. Fixed piston; 1403. Sliding cavity; 1404. Piston rod; 1405. Hydraulic cavity; 1406. Movable protrusion; 15. Flow regulating unit; 1501. Movable plate; 1502. Baffle plate; 1503. Connecting hole; 16. Storage pipe; 17. Heating tank. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1 like Figures 1 to 8 As shown, a water-saving dyeing and printing device for polyester fabric includes a dyeing tank 1, a dye tank 2, a feed pipe 3, and a heating tank 17. The dyeing tank 1 serves as the core area for fabric dyeing, providing a closed and stable environment for fabric dyeing. The dye tank 2 is used to mix the dye evenly and then transport it to the dyeing tank 1 to dye the fabric. The feed pipe 3 is used to transport the dye solution in the dye tank 2 to the overflow pipe 12 and the air pressure chamber 6 in the dyeing tank 1 for dyeing. The heating tank 17 is used to heat the dye solution transported by the dye tank 2.

[0031] It also includes a twisting device 9, which is movably disposed inside the dyeing tank 1. The twisting device 9 includes a protective member 904, a rotating housing 903 and a conveyor belt 902. The rotating housing 903 drives the protective member 904 to rotate and untwist the fabric. The protective member 904 untwists the fabric to different degrees in different contact states. When the fabric is detected to be twisted, the drive motor 901 drives the conveyor belt 902 to rotate in the opposite direction according to the twisting direction of the fabric, so that the protective member 904 drives the fabric to rotate in the opposite direction to untwist.

[0032] The pressure regulating unit 14, which is movably disposed inside the rotating housing 903, is used to adjust the clamping force of the conveyor belt 902 on the rotating housing 903. It includes a piston rod 1404 and a movable protrusion 1406. When the protective member 904 moves a greater distance toward the center position, the piston rod 1404 moves upward, causing the movable protrusion 1406 to move outward and increase the clamping force with the conveyor belt 902. This increases the torsional torque transmitted from the conveyor belt 902 to the rotating housing 903, preventing relative slippage between the conveyor belt 902 and the rotating housing 903 caused by the increased torsional torque in a wet environment.

[0033] An overflow pipe 12 is movably mounted above the rotating housing 903. One side of the overflow pipe 12 is connected to an outlet pipe 13 via a flow regulating unit 15. When the fabric passes through the overflow pipe 12, the dye liquor in the overflow pipe 12 is evenly coated onto the fabric. Then, under the overflow of the overflow pipe 12 and the drive of the conveying unit 8, it is conveyed upward. The other end of the outlet pipe 13 is connected to the inside of the feed pipe 3, and is used to convey the dye liquor inside the feed pipe 3 to the overflow pipe 12. The flow regulating unit 15 includes a baffle plate 1502. The piston rod 1404 drives the baffle plate 1502 to move upward and reduce the blocking area of ​​the outlet pipe 13. The amount of dye liquor entering the overflow pipe 12 along the outlet pipe 13 increases. When the twisting degree of the fabric is detected to increase, the fabric will have a low liquid carrying rate after being untwisted and conveyed to the overflow pipe 12 due to its large twisting degree. Therefore, the flow regulating unit 15 increases the opening of the outlet pipe 13 so that the fabric can absorb more dye liquor at the same time frequency, avoiding uneven dyeing.

[0034] The twisting device 9 also includes a drive motor 901, which is fixedly installed outside the dyeing tank 1, and its output end is movably connected to the conveyor belt 902 through a turntable. The drive motor 901 drives the rotating housing 903 to rotate through the conveyor belt 902. The drive motor 901 can drive the conveyor belt 902 to rotate clockwise or counterclockwise, and the output speed can be adjusted according to the fabric twisting situation detected by the detector 908.

[0035] The mounting cavities 905 are evenly distributed on the side wall of the rotating housing 903. That is, multiple mounting cavities 905 are provided on the rotating housing 903. The mounting cavities 905 are used to install the upper telescopic member 906 and the lower telescopic member 907. The internal air pressure of the mounting cavity 905 where the upper telescopic member 906 is installed is changed by the movement of the moving piston 1401. When the upper telescopic member 906 extends, it drives the moving piston 1401 to squeeze the gas in the mounting cavity 905, thereby increasing the internal air pressure. The increased air pressure will be balanced by the pressure regulating part 14.

[0036] The upper telescopic component 906 is fixedly installed inside the mounting cavity 905, and its output end is hinged to the upper end of the protective component 904. It is used to drive the upper end of the protective component 904 to move. The extension length of the upper telescopic component 906 adjusts the contact position between the protective component 904 and the fabric. The lower telescopic component 907 is fixedly installed inside the mounting cavity 905, and its output end is hinged to the lower end of the protective component 904. It is used to drive the lower end of the protective component 904 to move. The detector 908 is fixedly installed at the bottom of the rotating housing 903. It is used to detect the state of the fabric when it enters the rotating housing 903. The detector 908 transmits the detected different states of the fabric to the control system. The control system adjusts the extension length of the upper telescopic component 906 and the lower telescopic component 907, as well as the extension length of the upper telescopic component 906 and the lower telescopic component 907 at different positions, to deal with different fabric states.

[0037] The pressure regulating unit 14 further includes: a movable piston 1401, which is fixedly disposed at the output end of the upper telescopic member 906, and the outer surface of the movable piston 1401 is movably and sealingly connected to the inner wall of the upper mounting cavity 905, for moving and compressing the gas in the mounting cavity 905. When the movable piston 1401 moves toward the fixed piston 1402, the gas in the mounting cavity 905 is compressed into the sliding cavity 1403. When the movable piston 1401 moves away from the fixed piston 1402, the gas in the sliding cavity 1403 is drawn back into the mounting cavity 905; and a fixed piston 1402, which is fixedly disposed on the side of the mounting cavity 905 near the output end of the upper telescopic member 906, and the inner wall of the fixed piston 1402 is movably and sealingly connected to the outer surface of the upper telescopic member 906, for sealing and limiting the interior of the mounting cavity 905.

[0038] The sliding cavity 1403 is located inside the rotating housing 903. The top of the sliding cavity 1403 is connected to the outside, and the bottom is connected to the mounting cavity 905 through a channel. The sliding cavity 1403 is filled with a medium located above the piston rod 1404. A connecting cavity is provided at the channel position below the sliding cavity 1403. The connecting cavity connects multiple sliding cavities 1403 located inside the rotating housing 903. This is used to balance the air pressure in the multiple sliding cavities 1403 and the mounting cavity 905, and to prevent pressure fluctuations caused by the movement of the upper telescopic member 906 and the lower telescopic member 907 at a single position. When the gas in the mounting cavity 905 is forced into the sliding cavity 1403, the piston rod 1404 moves upward and squeezes the medium in the sliding cavity 1403 to flow into the hydraulic cavity 1405.

[0039] The piston rod 1404 is slidably and sealingly disposed within the sliding cavity 1403 to move and compress the medium within the sliding cavity 1403. The piston rod 1404 is configured with a piston at its lower end and a sliding seal between its upper end and the inner wall of the sliding cavity 1403. As the protective member 904 moves further toward the center, the piston rod 1404 moves further upward. The upward movement of the piston rod 1404 compresses the medium and causes it to flow into the hydraulic cavity 1405. The downward movement of the piston rod 1404 draws the medium from the hydraulic cavity 1405 back into the sliding cavity 1403.

[0040] The hydraulic chamber 1405 is located inside the rotating housing 903 and is connected to the side wall of the sliding chamber 1403 via a pipe on one side. The movable protrusion 1406 is movably connected inside the hydraulic chamber 1405, and the medium in the sliding chamber 1403 can be guided into the hydraulic chamber 1405.

[0041] The flow regulating unit 15 includes: a movable plate 1501, which is movably disposed at the bottom of the overflow pipe 12, and the bottom of the movable plate 1501 contacts the top of the piston rod 1404 for moving along with the piston rod 1404. The movable plate 1501 has a through hole in the middle for the fabric to pass through, and a sealing gasket is provided inside the through hole. The sealing gasket has an opening to clamp the fabric during fabric conveying to prevent the dye liquor from flowing downward through the through hole instead of overflowing above the overflow pipe 12; and a docking hole 1503, which is opened inside the baffle plate 1502 and has the same size as the outlet pipe 13. When the baffle plate 1502 moves, it drives the docking hole 1503 to move. The overlap area with the outlet pipe 13 is changed. When the fabric twists more, the upper telescopic component 906 extends, causing the moving piston 1401 to move and squeeze the gas in the upper mounting cavity 905, thereby pushing the piston rod 1404 upward. The piston rod 1404 contacts the movable plate 1501, thereby pushing the movable plate 1501 upward. The movable plate 1501 drives the baffle plate 1502 upward. The overlap area between the docking hole 1503 and the opening of the outlet pipe 13 increases, and the liquid flow rate of the outlet pipe 13 increases. This is suitable for the working condition of low liquid rate of fabric with increased twist, so that the fabric can quickly absorb the dye under the overflow of large flow of dye liquor to avoid uneven dyeing.

[0042] The rotating outer shell 903 is movably connected to the inside of the dyeing tank 1. After the fabric is untwisted inside the rotating outer shell 903, it enters the overflow pipe 12 upward for overflow dyeing. The conveyor belt 902 is movably connected to the outer surface of the rotating outer shell 903 and is pressed into contact with the movable protrusion 1406. The rotation of the conveyor belt 902 drives the rotating outer shell 903 to rotate through the movable protrusion 1406 and untwises the fabric. The baffle plate 1502 is fixedly set above the movable plate 1501 on the side near the outlet pipe 13. When the piston rod 1404 moves upward, it drives the baffle plate 1502 to move upward through the movable plate 1501.

[0043] Dye tank 2 and heating tank 17 are connected by a pipeline, used to transport the dye inside dye tank 2 to heating tank 17 for heating. Heating tank 17 heats the incoming dye to bring it to a suitable dyeing temperature. The feed pipe 3 connects heating tank 17 to dye tank 1, and transports the dye liquor from dye tank 2 to overflow pipe 12 through feed pipe 3 and outlet pipe 13. A pressure chamber 6 is fixedly installed on dye tank 2 for spraying high-pressure airflow to ensure uniform dyeing of the fabric. Multiple high-pressure nozzles are installed in pressure chamber 6. After the fabric reaches pressure chamber 6, the airflow sprayed through the high-pressure nozzles ensures full contact and mixing of the dye liquor and fabric, guaranteeing uniform dyeing. The material moves to the next position under air pressure. A pressure supply pipe 5 is fixedly installed on the side of the air pressure chamber 6 away from the dyeing tank 1 to provide high-pressure airflow to the air pressure chamber 6. The pressure supply pipe 5 continuously provides high-pressure airflow to the air pressure chamber 6 to ensure normal spraying inside the air pressure chamber 6. A feed auxiliary pipe 4 is installed on the dye tank 2. The other end of the feed auxiliary pipe 4 is connected to the inside of the air pressure chamber 6 to uniformly spray the dye liquid onto the fabric through high-pressure spraying. The feed auxiliary pipe 4 transports the dye liquid in the dye tank 2 to the air pressure chamber 6, and the uniform spraying of the dye liquid is achieved in conjunction with the high-pressure airflow. Under the action of the high-pressure airflow, the dye liquid absorbed by the fabric in the overflow pipe 12 is fully absorbed by the fabric, thereby ensuring the uniformity of dyeing.

[0044] The dyeing tank 1 is equipped with a conveyor section 8 for transporting fabric. The function of the conveyor section 8 is to transport fabric into the dyeing tank 1. The conveyor section 8 contains a fabric lifting roller, which rotates to ensure the fabric passes through the conveyor section 8 in an orderly manner and enters the pressure chamber 6, guaranteeing the continuity of dyeing. A shaking chamber 7 is fixedly installed outside the dyeing tank 1. The function of the shaking chamber 7 is to shake and disperse the dyed fabric to prevent it from sticking together. Furthermore, the shaking of the shaking chamber 7 ensures the fabric is evenly distributed within the storage pipe 16, reducing the usable area of ​​the device. A [missing information - likely a device name or feature] is fixedly installed at the bottom inside the dyeing tank 1. The storage tube 16 is used to collect the fabric at the bottom and repeat the dyeing process. The dyeing tank 1 has multiple outlets 11 on one side for placing the fabric inside the dyeing tank 1 and removing the fabric from the dyeing tank 1. The outlets 11 serve as the inlet and outlet channels for the fabric, making it convenient to put the fabric to be dyed into the dyeing tank 1 and to take out the dyed fabric. The dyeing tank 1 has an outlet section 10 on one side to guide the collection of the dyed fabric. The function of the outlet section 10 is to guide the dyed fabric to be smoothly discharged and to assist in the collection and sorting of the fabric, thereby improving the efficiency of subsequent processing.

[0045] In actual operation, the dye is put into the dye tank 2, the dye is stirred evenly in the dye tank 2 and transported to the heating tank 17 through the pipeline. The heating tank 17 heats the dye, and the dye liquor is transported to the dyeing tank 1 through the feed pipe 3. The fabric to be dyed is put into the dyeing tank 1 through the discharge port 11 on one side of the dyeing tank 1. Then, the segmented fabric is manually combined together in the dyeing tank 1 to form a closed loop.

[0046] The fabric passes through the overflow pipe 12. The dye liquor in the main feed pipe 3 flows through the outlet pipe 13 into the overflow pipe 12 and overflows upwards. The fabric is fully dyed in contact with the dye liquor in the overflow pipe 12. Then, the fabric passes through the conveying section 8 and enters the air pressure chamber 6 under the action of the fabric lifting roller. The high-pressure nozzles in the air pressure chamber 6 spray the high-pressure gas in the pressure supply pipe 5 evenly onto the surface of the fabric. At the same time, the dye liquor entering the air pressure chamber 6 through the feed auxiliary pipe 4 is evenly sprayed onto the surface of the fabric under the action of the high-pressure nozzles. Subsequently, the fabric enters the shaking chamber 7 under the action of the airflow in the air pressure chamber 6. At the same time, the fabric is shaken to make it evenly distributed in the storage pipe 16. The fabric enters the twisting device 9. If the fabric is twisted during the conveying process, it is untwisted by the twisting device 9. After the fabric passes through the twisting device 9, it will re-enter the overflow pipe 12 and then repeat the above process for dyeing.

[0047] During the above-mentioned operation, when the fabric reaches the twisting device 9, the detector 908 located at the bottom of the twisting device 9 will detect the state of the fabric when it reaches the inside of the rotating housing 903 in real time and transmit the detection signal to the control system. The control system adjusts the contact position between the protective component 904 and the fabric according to the degree of fabric twist. When the protective component 904 contacts the fabric, the drive motor 901 starts and drives the conveyor belt 902 to rotate through the turntable. The conveyor belt 902 drives the rotating housing 903 to rotate synchronously. According to the fabric twist direction detected by the detector 908, it rotates in the opposite direction and adjusts the rotation speed of the rotating housing 903 according to the fabric conveying speed, so that the protective component 904 contacts the fabric and rotates in the opposite direction to untwist.

[0048] When the detector 908 detects that the fabric is twisting clockwise, the drive motor 901 drives the conveyor belt 902 to rotate counterclockwise. The conveyor belt 902 drives the protective component 904 to rotate counterclockwise through the rotating housing 903. Before rotation, the edge position of the fabric during twisting is determined by the state of the fabric detected by the detector 908. The upper telescopic component 906 and lower telescopic component 907 corresponding to the edge position extend, so that the bent part of the protective component 904 is inserted into the edge position. Then, the upper telescopic component 906 and lower telescopic component 907 at other positions extend, so that the bent part of the protective component 904 contacts and slightly presses the fabric. Then, under the rotation of the protective component 904, the fabric rotates in the opposite direction to the twisting direction, thereby untwisting.

[0049] Furthermore, during the aforementioned process, when an increase in fabric twist is detected, the upper telescopic member 906 and the lower telescopic member 907 extend further, and the protective member 904 moves a greater distance toward the center. This allows the protective member 904 to contact the fabric and insert itself at the edge, thereby adapting to fabrics with different degrees of twist for untwisting. This prevents the fixed-length protective member 904 from failing to accurately contact the fabric when the degree of twist increases, and also prevents the fabric from undergoing a large-scale untwisting when the degree of twist is low or when there is no twist, which could lead to reverse twisting of the fabric.

[0050] During the untwisting process of the fabric as its twisting degree increases, the upper telescopic member 906 extends. The movable piston 1401, fixedly installed at the output end of the upper telescopic member 906, moves towards the fixed piston 1402 and squeezes the gas in the mounting cavity 905 into the sliding cavity 1403. The increased air pressure at the bottom of the piston rod 1404 pushes the piston rod 1404 upward. During the upward movement of the piston rod 1404, the piston at the bottom of the piston rod 1404 squeezes the medium in the sliding cavity 1403. The medium flows into the hydraulic cavity 1405. The increased hydraulic pressure in the hydraulic cavity 1405 pushes multiple movable protrusions 1406 towards the conveyor belt 902 and squeezes the conveyor belt 902, thereby increasing the overall clamping force between the conveyor belt 902 and the rotating shell 903. This adapts to the greater torsional force required when the fabric twisting degree increases, preventing relative slippage between the conveyor belt 902 and the rotating shell 903 due to the increased torsional torque, and ensuring stable and effective untwisting.

[0051] Furthermore, during the aforementioned process, the extension length of the upper telescopic member 906 at the edge of the fabric is greater than that of the upper telescopic member 906 at other positions. Since the channel below the sliding cavity 1403 is connected through the connecting cavity, the differentially extended upper telescopic member 906 will not cause an increase in the extension length of the piston rod 1404 at that location. The extension lengths of multiple piston rods 1404 are the same, and they drive the movable protrusion 1406 to extend the same length as the rotating outer shell 903, thus avoiding uneven force on the conveyor belt 902 caused by the movable protrusions 1406 with different extension lengths.

[0052] When the piston rod 1404 moves upward, it contacts the movable plate 1501 and pushes the movable plate 1501 to slide upward. The movable plate 1501 drives the baffle plate 1502 to move upward simultaneously. The overlapping area of ​​the docking hole 1503 on the baffle plate 1502 and the opening of the liquid outlet pipe 13 increases, thereby increasing the liquid flow rate of the liquid outlet pipe 13. The increased liquid flow rate of the liquid outlet pipe 13 is adapted to the fact that the liquid carrying rate of the fabric is low when the fabric twists. Increasing the liquid flow rate can make the fabric absorb more dye in the same time, avoiding uneven dyeing. When the fabric twists decrease or there is no twist, the upper telescopic part 906 moves in the opposite direction, and the flow regulating part 15 reduces the opening of the liquid outlet pipe 13, reducing the dye flow rate to adapt to the higher liquid carrying rate of the fabric, reducing dye waste and achieving water saving effect.

[0053] As the fabric is continuously conveyed upwards along the interior of the rotating housing 903 and reaches the overflow pipe 12 for overflow dyeing, and the fabric conveying speed matches the up-and-down movement speed of the baffle plate 1502, the overlap of the docking hole 1503 and the main feed pipe 3, along with the dye liquor discharged into the overflow pipe 12, uniformly and thoroughly dyes the fabric. Furthermore, due to the different degrees of actual twisting of the fabric itself during the conveying process, the multiple upper telescopic components 906 and lower telescopic components 907 drive the protective component 904 to move different distances inside the rotating housing 903. The corresponding piston rod 1404 drives the baffle plate 1502 to move up and down by different distances via the movable plate 1501. The baffle plate 1502 causes the overlapping area between the docking hole 1503 and the liquid outlet pipe 13 to change. The amount of dye liquor discharged from the liquid outlet pipe 13 along the docking hole 1503 into the overflow pipe 12 changes pulsively, further improving the pulsating flushing effect on its flow position. This prevents impurities in the fabric from clogging the docking hole 1503, the liquid outlet pipe 13, and the inner wall of the overflow pipe 12 during long-term use, thus affecting the dyeing quality of subsequent dye liquor.

[0054] Meanwhile, after the dyeing of this batch of fabric is completed, clean water is continuously discharged from the inside of the liquid outlet pipe 13. At this time, the baffle plate 1502 drives the docking hole 1503 to move up and down continuously and adjust the overlapping area with the liquid outlet pipe 13, so as to further realize the pulse discharge of liquid outlet pipe 13 into the overflow pipe 12, improve the flushing and cleaning effect on the fabric impurities attached to the inner wall of overflow pipe 12, and avoid affecting the dyeing of subsequent fabrics.

[0055] Throughout the untwisting process, the device uses the twisting device 9 to ensure the fabric is untwisted before entering the overflow pipe 12, preventing the fabric from entering the overflow pipe 12 in a twisted state. This solves the problem of twisted fabric not being able to fully absorb the dye liquor, leading to uneven dyeing. The upper telescopic member 906 and the lower telescopic member 907 drive the protective member 904 to move synchronously. The greater the degree of fabric twist, the greater the distance the protective member 904 moves towards the center, thus enabling precise contact with the fabric and adaptive untwisting. This avoids fabric damage caused by the fixed protective member 904 when untwisting fabrics with different degrees of twist. Simultaneously, the upper telescopic component 906 moves to drive the pressure regulating part 14 to move synchronously. When the fabric twist increases, the extension length of the movable protrusion 1406 increases, and the pressing area and pressing force of the conveyor belt 902 and the rotating shell 903 increase. This adapts to the need for a larger torsional torque when the twist increases, preventing slippage caused by the fixed conveyor belt 902 and the rotating shell 903 working together under wet conditions. Furthermore, the flow regulating part 15 adjusts the opening size of the liquid outlet pipe 13 to ensure that the dye liquor inside the overflow pipe 12 can be evenly and thoroughly overflowed and dyed on the fabric.

[0056] After dyeing is completed, the joint of the fabric is located, the joint is removed, and then the joint is disassembled. After disassembly, the fabric is collected and sorted under the guidance of the discharge section 10. The discharge section 10 guides the fabric to be smoothly discharged, and the entire dyeing and printing process is completed in a closed loop.

[0057] Example 2 In actual operation, the increased twisting degree of the fabric leads to increased fabric stiffness. Consequently, the torque exerted by the protective component 904 on the fabric increases during untwisting. Furthermore, the contact area between the protective component 904 and fabrics with different twisting degrees cannot be adaptively adjusted, resulting in scratches or even tears caused by the protective component 904 during untwisting. The fabric is prone to edge curling during transport, and the existing device cannot specifically untwise the curled areas, leading to incomplete untwisting and affecting dyeing quality. Moreover, gaps may appear at the joints of the fabric during cyclic dyeing, and the high-flow dye liquor wash will exacerbate this process. The fabric may break during untwisting and transport. The broken fabric will twist and knot within the storage tube 16, making it difficult to quickly position and reconnect for rework.

[0058] To address the aforementioned technical issues, in practical use, when the fabric twist increases, multiple upper telescopic components 906 and lower telescopic components 907 simultaneously extend to bring the protective component 904 into contact with the surface of the twisted fabric. The upper telescopic components 906 and lower telescopic components 907 at the fabric edge seams extend a greater distance than at other locations, allowing the bent portion of the protective component 904 to insert into the edge seams. However, as the fabric twist increases, the stiffness of the twisted fabric also increases. Simultaneously, the reverse torque generated by the protective component 904 relative to the rotating outer shell 903 at the contact point with the fabric increases. When the bent portion of the protective component 904 inserts into the fabric and is rotated in the opposite direction to untwist, the force exerted by the protective component 904 on the fabric increases. If the protective component 904, with its relatively small contact area, rotates, the force on the fabric can cause scratches and tears during the untwisting process.

[0059] Therefore, during the entire elongation process of the upper telescopic member 906 and the lower telescopic member 907, as the degree of torsion increases, the extension length of the lower telescopic member 907 increases proportionally to the extension length of the upper telescopic member 906. When the extension length of the lower telescopic member 907 increases, the lower end of the protective member 904 rotates, and the contact area between the protective member 904 and the fabric gradually increases. Therefore, under the same torsional force, the pressure of the protective member 904 on the fabric will decrease accordingly, avoiding large pressure during the untwisting process that could cause scratches or damage to the fabric.

[0060] Furthermore, in actual operation, the fabric may curl at the edges rather than twisting as a whole. In this case, it is not necessary for multiple upper telescopic components 906 and lower telescopic components 907 to extend simultaneously. It is only necessary to detect the curled position through the detector 908, and then adjust the upper telescopic components 906 and lower telescopic components 907 at the corresponding positions to extend, while the upper telescopic components 906 and lower telescopic components 907 at other positions shorten to the minimum distance. The drive motor 901 drives the conveyor belt 902, which in turn causes the rotating shell 903 to rotate the protective component 904, thus reversing the curled part. The rotation smooths the surface, and at the same time, the multiple upper telescopic parts 906 and lower telescopic parts 907 shorten to the minimum distance to avoid the protective part 904 contacting the fabric when the rotating shell 903 rotates, causing the fabric, which is not twisted as a whole, to twist. In this process, the extension of the upper telescopic parts 906 and lower telescopic parts 907 corresponding to the curled position will drive the flow regulating part 15 to increase the opening size of the liquid outlet pipe 13. However, since only the upper telescopic parts 906 and lower telescopic parts 907 at the curled position are extended at this time, while other parts are in a contracted state, it is suitable for the liquid outlet flow rate when only the curling exists.

[0061] During the dyeing process, the fabric is usually dyed repeatedly inside the dyeing tank 1 by connecting the ends to ensure uniform dyeing. The joint is usually sewn together. During the repeated dyeing process inside the dyeing tank 1, gaps are generated at the joints. When the detector 908 detects a gap at the joint, the upper telescopic component 906 shortens and drives the flow regulating part 15 to reduce the opening size of the outlet pipe 13. When the joint is located inside the overflow pipe 12, the reduced opening size of the outlet pipe 13 is suitable for the joint, which does not require a large flow of dye liquor for dyeing. Furthermore, the reduced flow can also prevent a large flow of dye liquor from washing over the joint, which could lead to an increase in the gap at the joint and cause the fabric to break at the joint.

[0062] During the entire processing, if the fabric breaks due to insufficient strength to meet the untwisting requirements, the detector 908 detects this process. Multiple upper telescopic components 906 and lower telescopic components 907 simultaneously extend to their maximum distance, causing the bending portions of multiple protective components 904 to clamp the broken fabric within the rotating housing 903. This effectively prevents the broken fabric from re-entering the storage tube 16 and twisting and knotting due to its inertia. Furthermore, after the protective components 904 clamp the broken fabric, it can be directly fixed... The system quickly reconnects and resumes operation at the break point to prevent the fabric break from falling into the storage pipe 16 and having to search for it again. During the simultaneous extension of multiple upper telescopic parts 906 and lower telescopic parts 907 to their maximum distance, the piston rod 1404 extends upward to its maximum position under air pressure. This, in turn, drives the baffle plate 1502 to move upward to its maximum position via the movable plate 1501. At this time, the overlapping area between the docking hole 1503 and the opening of the liquid outlet pipe 13 gradually decreases and closes, preventing the dye liquor from continuously overflowing into the liquid outlet pipe 13 after the fabric break, thus avoiding energy waste.

[0063] Example 3 A water-saving dyeing process for polyester fabrics, which utilizes a water-saving dyeing device for polyester fabrics, includes the following steps: S1: The fabric moves upward into the rotating outer shell 903 for untwisting. After untwisting, it continues to move upward into the overflow pipe 12 for overflow dyeing.

[0064] S2: When the fabric twisting degree increases, the protective part 904 moves closer to the fabric end, the piston rod 1404 moves upward, the movable protrusion 1406 moves outward and increases the clamping force with the conveyor belt 902, the conveyor belt 902 drives the rotating housing 903 to rotate and the torque increases, the piston rod 1404 drives the baffle plate 1502 to move upward and increases the opening of the liquid outlet pipe 13.

[0065] S3: When a gap appears at the fabric joint, the protective part 904 moves away from the fabric end, the piston rod 1404 moves upward less, the movable protrusion 1406 moves inward and disengages from the clamping force of the conveyor belt 902, the rotating shell 903 does not rotate, and the piston rod 1404 drives the baffle plate 1502 to move downward and reduce the opening of the liquid outlet pipe 13.

[0066] S4: When the fabric breaks, multiple protective components 904 move to the maximum distance near the fabric end and clamp the broken position. The piston rod 1404 moves up to the maximum distance and drives the baffle plate 1502 to block the liquid outlet pipe 13, and the conveyor belt 902 stops driving.

[0067] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A water-saving dyeing and printing device for polyester fabrics, comprising a dyeing tank (1), characterized in that, Also includes: The twisting device (9) is movably installed inside the dyeing tank (1) and includes a protective part (904), a rotating shell (903) and a conveyor belt (902). The rotating shell (903) drives the protective part (904) to rotate and untwist the fabric. The pressure regulating part (14) is movably disposed inside the rotating housing (903) and includes a piston rod (1404) and a movable protrusion (1406). When the protective member (904) moves a greater distance toward the center position, the piston rod (1404) moves upward, causing the movable protrusion (1406) to move outward and increasing the squeezing force with the conveyor belt (902). An overflow pipe (12) is movably disposed above a rotating outer shell (903). One side of the overflow pipe (12) is connected to an outlet pipe (13) via a flow regulating part (15). The flow regulating part (15) includes a baffle plate (1502). A piston rod (1404) drives the baffle plate (1502) to move upward and reduce the blockage area on the outlet pipe (13), thereby increasing the amount of dye liquid entering the overflow pipe (12) along the outlet pipe (13).

2. The water-saving dyeing and printing device for polyester fabric according to claim 1, characterized in that, The torsion device (9) also includes: The drive motor (901) is fixedly installed outside the dyeing tank (1), and its output end is movably connected to the conveyor belt (902) through the turntable. The drive motor (901) drives the rotating shell (903) to rotate through the conveyor belt (902). The detector (908) is fixedly installed at the bottom of the rotating housing (903) and is used to detect the state of the fabric when it reaches the inside of the rotating housing (903).

3. The water-saving dyeing and printing device for polyester fabric according to claim 1, characterized in that, The torsion device (9) also includes: The mounting cavity (905) is evenly distributed on the side wall of the rotating housing (903); The upper telescopic component (906) is fixedly installed inside the mounting cavity (905), and its output end is hinged to the upper end of the protective component (904) to drive the upper end of the protective component (904) to move. The lower telescopic component (907) is fixedly installed inside the mounting cavity (905), and its output end is hinged to the lower end of the protective component (904) to drive the lower end of the protective component (904) to move.

4. The water-saving dyeing and printing device for polyester fabric according to claim 3, characterized in that, The pressure regulating unit (14) includes: The movable piston (1401) is fixedly installed at the output end of the upper telescopic member (906), and the outer surface of the movable piston (1401) is movably and sealingly connected to the inner wall of the mounting cavity (905) for moving and compressing the gas in the mounting cavity (905); A fixed piston (1402) is fixedly disposed in the mounting cavity (905) near the output end of the upper telescopic member (906), and the inner wall of the fixed piston (1402) is movably and sealingly connected to the outer surface of the upper telescopic member (906).

5. The water-saving dyeing and printing device for polyester fabric according to claim 1, characterized in that, The pressure regulating unit (14) also includes: The sliding cavity (1403) is located inside the rotating housing (903). The top of the sliding cavity (1403) is connected to the outside, and the bottom is connected to the mounting cavity (905) through a channel. The hydraulic chamber (1405) is located inside the rotating outer shell (903) and one side is connected to the side wall of the sliding chamber (1403) via a pipe. The movable protrusion (1406) is movably connected inside the hydraulic chamber (1405).

6. The water-saving dyeing and printing device for polyester fabric according to claim 1, characterized in that, The flow regulation unit (15) also includes: The movable plate (1501) is movably disposed at the bottom of the overflow pipe (12), and the bottom of the movable plate (1501) contacts the top of the piston rod (1404); The docking hole (1503) is located inside the baffle plate (1502) and its size is the same as that of the liquid outlet pipe (13). When the baffle plate (1502) moves, it drives the docking hole (1503) to move and changes the overlapping area with the liquid outlet pipe (13).

7. The water-saving dyeing and printing device for polyester fabric according to claim 5, characterized in that, The rotating shell (903) is movably connected to the inside of the dyeing tank (1). After the fabric is untwisted inside the rotating shell (903), it enters the overflow pipe (12) for overflow dyeing. The piston rod (1404) is sealed and slidably set inside the sliding cavity (1403). The protective part (904) moves a greater distance toward the center position, and the piston rod (1404) moves a greater distance upward.

8. The water-saving dyeing and printing device for polyester fabric according to claim 6, characterized in that, The conveyor belt (902) is movably connected to the outer surface of the rotating housing (903) and presses against the movable protrusion (1406). The conveyor belt (902) rotates and drives the rotating housing (903) to rotate through the movable protrusion (1406) and untwist the fabric. The baffle plate (1502) is fixedly set above the movable plate (1501) on the side near the liquid outlet pipe (13). When the piston rod (1404) moves upward, it drives the baffle plate (1502) to move upward through the movable plate (1501).

9. A water-saving dyeing process for polyester fabric, wherein the water-saving dyeing process utilizes the water-saving dyeing device for polyester fabric as described in claim 1, characterized in that... Includes the following steps: S1: The fabric enters the rotating shell (903) upwards for untwisting, and after untwisting, it continues to enter the overflow pipe (12) upwards for overflow dyeing; S2: When the fabric twisting degree increases, the protective part (904) moves closer to the fabric end by a larger amount, the piston rod (1404) moves upward by a larger amount, the movable protrusion (1406) moves outward and increases the clamping force with the conveyor belt (902), the conveyor belt (902) drives the rotating shell (903) to rotate by a larger torque, and the piston rod (1404) drives the baffle plate (1502) to move upward and increase the opening of the liquid outlet pipe (13); S3: When a gap appears at the fabric joint, the protective part (904) moves away from the fabric end, the piston rod (1404) moves up less, the movable protrusion (1406) moves inward and disengages from the clamping force of the conveyor belt (902), the rotating shell (903) does not rotate, and the piston rod (1404) drives the baffle plate (1502) to move down and reduce the opening of the liquid outlet pipe (13); S4: When the fabric breaks, multiple protective components (904) move to the maximum distance near the fabric end and clamp the broken position, the piston rod (1404) moves up to the maximum distance and drives the baffle plate (1502) to block the liquid outlet pipe (13), and the conveyor belt (902) stops driving.

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