Water-saving circulating system based on beam dyeing

Abstract

The invention discloses a water-saving circulating system based on beam dyeing, which belongs to the technical field of textile dyeing and comprises a dye vat, a beam, a water inlet pipe, a water outlet pipe, a color fixing mechanism, a cloth inlet mechanism, a cloth outlet mechanism, a sampling cup, a reversing valve and a preparation vat. The preparation vat is added in the dyeing process, the flowing direction of water between the dye vat and the reversing valve is switched through parts such as the communicating pipe, water is stored, the collected water is switched to proper dyeing process steps for reasonable application, and the use dosage of the water, dye and auxiliaries is further reduced; the dyeing process is improved by means of the preparation vat, part of dyeing water can be consumed every time the preparation vat pumps and recycles most reuse water from the dye vat to the preparation vat stores the most reuse water, but compared with a traditional four-water process, most water can be recycled, and the difficulty of follow-up wastewater treatment is reduced.

Description

Technical Field

[0001] The invention discloses a textile dyeing technology, in particular to a water-saving circulation system based on warp beam dyeing. Background Art

[0002] The textile industry is an important industry in my country's national economy. For a long time, the textile industry has made significant contributions to the development of the national economy, solving the problem of people's clothing, and earning foreign exchange through exports. The dyeing and finishing industry, as a connecting bridge, undoubtedly plays an important role in this industry. The dyeing and finishing industry is the key to deep processing, fine processing and added value of textiles. It is the link between textile fibers, raw yarns, and grey cloths processed into final products entering the consumer goods market, and plays an important role in promoting the common development of products.

[0003] Traditional warp overflow dyeing not only has various restrictions on the dyeing objects, but also has fatal disadvantages such as large bath ratio, high power consumption, large amount of dye additives and long process time. The traditional yarn dyeing process includes four water intake processes: cloth entry> water intake> dyeing> drainage> color matching> water intake> color fixation (reduction cleaning)> drainage> water intake> neutralization cleaning> drainage> water intake> cleaning> drainage> cloth exit, consuming a total of 15%×4=60 weight ratio of water. In view of the disadvantage of high water consumption of traditional yarn dyeing equipment, it is necessary to develop a new type of yarn dyeing industrial equipment to overcome the above-mentioned disadvantage of high water consumption. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and provide a water-saving circulation system based on warp beam dyeing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water-saving circulation system based on warp beam dyeing, comprising a dyeing vat, a warp beam, a water inlet pipe, a drain pipe, a color fixing mechanism, a cloth feeding mechanism, a cloth discharging mechanism, a sampling cup, a reversing valve and a preparatory vat, wherein the reversing valve switches the interface connection state between the water inlet pipe, the drain pipe and the dyeing vat, and the preparatory vat dyeing process comprises the following steps: S1, feeding the fabric to be dyed into the dyeing vat through the fabric feeding mechanism, winding the fabric to be dyed onto the warp beam, and pre-filling the preparation vat with dyeing liquid; S2, extracting dye liquid from the preparatory tank through the water inlet pipe and injecting it into the dyeing tank, performing warp beam overflow dyeing and dyeing water replenishment on the fabric through the warp beam until the dyeing process is completed, discharging the remaining dye liquid in the dyeing tank after dyeing and washing is completed into the preparatory tank through the drain pipe, drying the fabric, and draining the dye liquid into the dyeing tank; S3, after the dye vat is drained, the dye vat is opened, the preparatory vat is filled with water, the color accuracy of the fabric in the preparatory vat and the dye solution in the dye vat is observed through a sampling cup, and the solubility of the dye in the dye solution is adjusted according to the color matching result; S4, after the color accuracy is adjusted to be consistent, the dye vat is closed, the dye liquid in the preparatory vat is extracted from the dye vat through the water inlet pipe, a fixing agent is added to perform reduction cleaning on the fabric in the dye vat, the remaining dye liquid after the reduction cleaning in the dye vat is discharged into the preparatory vat through the drain pipe, and the fabric in the dye vat is dried and fixed; S5, adding clean water into the dye vat through the water inlet pipe, adding a neutralizer to the clean water in the dye vat to perform the first neutralization cleaning on the fabric, and after the first neutralization cleaning is completed, draining the neutralization cleaning liquid into the preparatory vat through the drain pipe; S6, the neutralization cleaning liquid in the preparation tank is replenished with water and then adjusted to a neutralization degree by a neutralizer, and the adjusted neutralization cleaning liquid is pumped into the dyeing tank through a water inlet pipe for a second neutralization cleaning, and after the second neutralization cleaning is completed, the neutralization cleaning liquid is drained into the preparation tank through a drain pipe, and the dyeing tank is opened to discharge the cloth through a cloth discharging mechanism; The reversing valve includes a four-way valve body and a movable valve part, the movable valve part is driven by a driving motor, the inner wall of the four-way valve body is provided with four flow channels, the top of the movable valve part is provided with a spherical valve flap, and the spherical valve flap is provided with a semi-lunar valve groove for switching and connecting two of the four flow channels.

[0006] By adopting the above technical scheme, the acid contained in the wastewater extracted after acid dyeing can be used as a color fixation acid in the subsequent process, thereby reducing the amount of acid used; the wastewater extracted after disperse dyeing is reused for reduction cleaning, and at the same time, the dyeing wastewater can be degraded and faded, thereby reducing the difficulty of sewage treatment; the driving motor can control the spherical valve disc to drive the half-moon valve slot to change the position, thereby realizing the connection of two of the four flow channels, and the A, B, and C flow channels correspond to the connected drain pipe, the water inlet pipe, and the dye vat respectively, and the half-moon valve slot of the reversing valve ensures that multiple groups of reversing valves can be connected, and multiple preparation tanks can be stored and configured according to the amount of dye solution used to use and exchange the recycled dye solution in different process steps, and the stop valve can control the connection of the connecting pipe, so that the preparation tanks do not affect each other when storing different recycled dye solutions.

[0007] Preferably, the dye vat and the preparation bar are equipped with a liquid pump for sucking the dye liquid.

[0008] By adopting the above technical solution, the liquid pump for sucking the dye liquid can realize the alternating circulation of water in the dye vat and the preparation bar, thereby realizing the reuse of waste water.

[0009] Preferably, the dye liquor discharged into the preparation tank in step S3 is reused for color fixing in step S4.

[0010] By adopting the above technical solution, the amount of color fixing agent used in the traditional process is generally 4% of the amount of dye used. The improvement adopts the dye liquor discharged into the preparation tank in step S3. The acid contained in the dye liquor can be used as water for color fixing acid in the subsequent process, thereby reducing the amount of additional acid added for subsequent color fixing acid.

[0011] Preferably, the dye liquor discharged into the preparation tank in step S4 is reused for neutralization and cleaning in step S6.

[0012] By adopting the above technical solution, conventional neutralization cleaning is to introduce additional detergent or water to adjust the pH value of the subsequent fabric, which requires additional water and detergent. The dye liquor discharged into the preparation tank in step S4 is reused in the neutralization cleaning in step S6, which can be reused as the washing liquid for reduction cleaning. At the same time, the water used after dyeing is degraded and faded, reducing the difficulty of wastewater treatment at the back end.

[0013] Preferably, the preparatory cylinders are equipped with a plurality of groups, the preparatory cylinders are exchanged and communicated with each other through connecting pipes, and a stop valve is provided to control the communication of the connecting pipes.

[0014] By adopting the above technical solution, multiple groups of preparation cylinders can be used for different dyeing processes to reserve dye liquor and washing liquor containing different dyes in different process flows, collect them by classification, and adjust the process for circulating water utilization.

[0015] Preferably, the dye vat comprises a water distribution plate arranged at the top and a cylinder body located on the outside, a water collector and a main pump are arranged at the bottom of the cylinder body, and a plurality of guide grooves and water flow channels symmetrically arranged relative to the water distribution plate and the water collector are arranged on the outside of the cylinder body.

[0016] By adopting the above technical solution, the guide groove is symmetrically arranged relative to the water distribution plate and the water collector, so that the dye liquid after the cloth and the dye liquid are separated can quickly flow back to the bottom of the tank, ensuring that the nozzle pressure is not reduced due to the small amount of dye liquid, and minimizing the invalid space of dye liquid circulation, thereby greatly reducing the bath ratio, which not only saves dye liquid and auxiliary agents, but also reduces the amount of sewage discharged. The main pump is used to provide power for extracting dye liquid.

[0017] Preferably, the dye vat is equipped with a coiling machine, which includes a cloth feeding frame movable by rollers, a width expansion and centering device, two movable rollers, a synchronous adjustment wheel set, a coiling and winding device and a coiling swing arm.

[0018] By adopting the above technical scheme, the cloth to be rolled is fed from the cloth feeding rack in a flat width, centered by the expansion centering device, and then put into the two-roller movable rolling mill for water pre-rolling. After being stretched and flattened by the stretching guide rail, it is pulled to the rolling and winding device for constant tension winding, and the winding is sent to the warp beam for dyeing. The dyed warp beam cloth roll is then installed on the rolling and winding device. The fabric is pre-rolled by two rollers to make the fabric evenly coated with liquid. During the dyeing process, the fabric width directions of left, middle and right as well as the inner and outer layers and the middle layer of the winding are consistent in color, and the fabric has a uniform color after dyeing. After pre-rolling, the fabric is stretched and flattened by the stretching guide rail to avoid wrinkles that may be produced during the fabric winding process and ensure the dyeing quality of the product.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention adds a preparatory tank in the dyeing process, switches the water flow direction between the dyeing tank and the reversing valve through a connecting pipe and other components, realizes the storage of water and the switching of the collected water to the appropriate dyeing process steps for reasonable use, thereby further reducing the dosage of water, dyes and auxiliaries; The cloth to be rolled is fed from the cloth feeding rack in a flat width, centered by the expansion centering device, and then pre-rolled by two active rollers, and then stretched and flattened by the tentering guide rail, and then pulled to the winding and rolling device for constant tension winding, and then sent to the warp beam for dyeing. The dyed warp beam cloth roll is then installed on the winding and rolling device, and the cloth is unwound by the winding and winding device with constant tension. The cloth is pre-rolled by two rollers to make the cloth carry liquid evenly, so that the color of the left, middle and right width directions of the fabric and the inner and outer layers and the middle layer of the winding are consistent during the dyeing process, and the fabric obtains a uniform color after dyeing; after pre-rolling, it is stretched and flattened by the tentering guide rail, which avoids wrinkles that may be generated during the fabric winding process and ensures the dyeing quality of the product; The guide groove is symmetrically arranged relative to the water distribution plate and the water collector, so that the dye liquid can quickly flow back to the bottom of the tank after the cloth and dye liquid are separated, ensuring that the nozzle pressure does not decrease due to the small amount of dye liquid, and minimizing the invalid space of dye liquid circulation, thereby greatly reducing the bath ratio, which not only saves dye liquid and auxiliaries, but also reduces the amount of sewage discharge; With the aid of the preparation tank of the present application, the dyeing process is improved. Each time the preparation tank is drawn out from the dyeing tank and most of the recycled water is stored in the preparation tank. Some of the dyeing water will be lost, but compared with the traditional four-water process, most of the water can be recycled and utilized, and the difficulty of subsequent wastewater treatment is reduced; The driving motor can control the spherical valve disc to drive the half-moon valve slot to change its position, thereby realizing the connection between two of the four flow channels. The A, B, and C flow channels correspond to the connected drain pipe, the water inlet pipe, and the dye vat respectively. The half-moon valve slot of the reversing valve ensures that multiple groups of reversing valves can be connected. According to the amount of dye liquid, multiple preparation tanks can be stored and configured for the use and redistribution of recycled dye liquid in different process steps. The stop valve can control the connection of the connecting pipe so that the preparation tanks do not affect each other when storing different recycled dye liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a simplified diagram of the process of traditional warp beam overflow dyeing; Figure 2 A simplified flow chart of the water-saving circulation system of this application; Figure 3 A symbol of a dye vat Figure 1 ; Figure 4 A symbol of a dye vat Figure 2 ; Figure 5 It is a schematic diagram of the connection between the reversing valves; Figure 6It is a structural schematic diagram of the reversing valve; Figure 7 A partial cross-sectional view of the reversing valve.

[0021] Figure numerals: 2. water distribution plate; 3. cylinder body; 4. water flow channel; 5. guide groove; 6. water collector; 7. main pump; 8. dye vat; 9. cloth feeding rack; 10. expansion and centering device; 11. two-roller movable rolling; 12. synchronous adjustment wheel set; 13. winding and rewinding device; 14. winding swing arm; 15. reversing valve; 16. stop valve; 17. four-way valve body; 18. movable valve part; 19. spherical valve disc; 20. half-moon valve groove; 21. flow channel. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which 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. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the traditional warp overflow dyeing process, a four-water process is generally adopted. Assuming that the water-bath ratio of each warp dyeing is 1:15, the process can be simplified as follows: cloth input > water input > dyeing > drainage > color matching > water input > color fixation (reduction cleaning) > drainage > water input > neutralization cleaning > drainage > water input > cleaning > drainage > cloth output. During the dyeing, color fixation, neutralization cleaning and secondary cleaning processes, these process steps require the addition of new water and new dyes and chemicals and other auxiliaries to the dye vat 8, and each time the water needs to be discharged for subsequent wastewater treatment. Each water input process consumes a large amount of water, and the drainage cannot be effectively utilized.

[0024] A water-saving circulation system based on warp beam dyeing, such as Figure 2-Figure 4 As shown, it includes a dye vat 8, a warp beam, a water inlet pipe, a drain pipe, a color fixing mechanism, a cloth feeding mechanism, a cloth discharging mechanism, a sampling cup, a reversing valve and a preparatory vat. The reversing valve switches the interface connection state between the water inlet pipe, the drain pipe and the dye vat 8. The preparatory vat is equipped with several groups. like Figure 5-Figure 7As shown, the preparation cylinders are exchanged and connected through a connecting pipe, and a stop valve 16 for controlling the connection of the connecting pipe is provided. The dye vat 8 and the preparation bar are equipped with a liquid pump for sucking the dye liquid; the reversing valve 15 includes a four-way valve body 17 and a movable valve part 18, and the movable valve part 18 is driven by a driving motor. The inner wall of the four-way valve body 17 is provided with four flow channels 21, and a spherical valve disc 19 is provided at the top of the movable valve part 18. The spherical valve disc 19 is provided with a half-moon valve slot 20 for switching and connecting two of the four flow channels 21. The driving motor can control The spherical valve disc 19 drives the half-moon valve slot 20 to change its position, thereby realizing the connection between two of the four flow channels 21, and the A, B, and C flow channels 21 correspond to the connected drain pipe, the water inlet pipe, and the dye vat 8, respectively. The half-moon valve slot 20 of the reversing valve 15 ensures that multiple groups of reversing valves 15 can be connected, and multiple preparation tanks can be stored and configured according to the amount of dye solution used for different process steps. The use and conversion of recycled dye solution, and the stop valve 16 can control the connection of the connecting pipe, so that the preparation tanks do not affect each other when storing different recycled dye solutions.

[0025] The preparatory tank dyeing process includes the following steps: S1, feeding the fabric to be dyed into the dyeing vat 8 through the fabric feeding mechanism, winding the fabric to be dyed onto the warp beam, and pre-filling the preparation vat with dyeing liquid; S2, extracting dye liquid from the preparation tank through the water inlet pipe and injecting it into the dye tank 8, performing warp overflow dyeing and dyeing water replenishment on the fabric through the warp beam until the dyeing process is completed, discharging the remaining dye liquid in the dye tank 8 after dyeing and washing is completed into the preparation tank through the drain pipe, drying the fabric, and draining the dye liquid into the dye tank 8; S3, after the dye vat 8 is drained, the dye vat 8 is opened, and the preparatory vat is filled with water. The color accuracy of the fabric in the preparatory vat and the dye solution in the dye vat 8 is observed through a sampling cup, and the solubility of the dye in the dye solution is adjusted according to the color matching result. The dye solution drained into the preparatory vat in step S3 is reused for color fixation in step S4. During the color fixation process, the pH value needs to be adjusted to an acidic range, usually between 4.5 and 5. The amount of color fixation agent used in the traditional process is generally 4% of the amount of dye, in order to ensure that the color fixation agent and the dye react under the best conditions. The dye solution drained into the preparatory vat in step S3 of the present application, the acid contained in the dye solution (i.e., the dye solution drained into the preparatory vat in this step) can be used as water for color fixation in the subsequent process, thereby reducing the amount of additional acid added for subsequent color fixation; S4, after the color accuracy is adjusted to be consistent, the dye vat 8 is closed, the dye vat 8 draws the dye liquid in the preparatory vat through the water inlet pipe, and the fixing agent is added to perform reduction cleaning on the fabric in the dye vat 8, and the remaining dye liquid after the reduction cleaning in the dye vat 8 is discharged into the preparatory vat through the drain pipe, and the fabric in the dye vat 8 is dried and fixed. The dye liquid discharged into the preparatory vat in step S4 is reused for neutralization cleaning in step S6.

[0026] S5, adding clean water into the dye vat 8 through the water inlet pipe, adding a neutralizer to the clean water in the dye vat 8 to perform the first neutralization cleaning on the fabric, and draining the neutralization cleaning liquid into the preparatory vat through the drain pipe after the first neutralization cleaning. In the reduction cleaning step of the traditional fabric dyeing process, sodium hydroxide and hydrosulfite solution are mostly used to treat the fabric to remove the disperse dyes on the fiber surface, and a surfactant is often used during the treatment. However, the water used for dyeing with disperse dyes according to the scheme of the present application can be reused as a washing liquid for reduction cleaning, and the water used for dyeing is degraded and faded, thereby reducing the difficulty of back-end sewage treatment.

[0027] S6, the neutralization cleaning liquid in the preparation tank is replenished with water and the neutralization degree is adjusted by a neutralizer, and the adjusted neutralization cleaning liquid is pumped into the dye tank 8 through the water inlet pipe for a second neutralization cleaning. After the second neutralization cleaning is completed, the neutralization cleaning liquid is drained into the preparation tank through the drain pipe, and the dye tank 8 is opened to discharge the cloth through the cloth discharge mechanism.

[0028] Compared with the traditional four-water process, assuming that the water bath ratio of each warp dyeing is 1:15, a total of 60 weight ratios of water are required. By using the preparation tank of the present application to improve the dyeing process, the recycling rate of the water drawn out from the dye tank 8 each time and stored in the preparation tank is 90%, 10% of the water will be lost, and an additional 10% of the water needs to be supplemented, and a total of 15x2+10%x15x2=33 weight ratios of water are consumed. Compared with the traditional four-water process, about 45% of the water can be recycled and reused, and the difficulty of subsequent wastewater treatment is reduced; like Figure 3 As shown, the dyeing vat 8 includes a water dividing plate 2 arranged at the top and a cylinder body 3 located at the outside, a water collector 6 and a main pump 7 are arranged at the bottom of the cylinder body 3, and a plurality of guide grooves 5 and water flow channels 4 are arranged symmetrically relative to the water dividing plate 2 and the water collector 6 on the outside of the cylinder body 3. The guide grooves 5 are symmetrically arranged relative to the water dividing plate 2 and the water collector 6, so that the dyeing liquid after the cloth and the dyeing liquid are separated can quickly flow back to the bottom of the vat, ensuring that the nozzle pressure is not reduced due to the small amount of dyeing liquid, and minimizing the invalid space of dyeing liquid circulation, thereby greatly reducing the bath ratio, which not only saves dyeing liquid and auxiliary agents, but also reduces the amount of sewage discharge; like Figure 4 As shown, the dyeing vat 8 is equipped with a winding machine, which includes a cloth feeding frame 9 that moves through rollers, a width expansion and centering device 10, two-roller movable rollers 11, a synchronous adjustment wheel set 12, a winding and rewinding device 13 and a winding swing arm 14. The cloth to be rolled is fed in flat width from the cloth feeding frame 9, and after being centered by the width expansion and centering device 10, it enters the two-roller movable roller 11 for water immersion and pre-rolling. After being stretched and flattened by the stretching guide rail, it is pulled to the winding and rewinding device 13 for constant tension winding, and then sent to the warp beam for dyeing. The dyed warp beam cloth roll is then installed on the winding and rewinding device 13. The cloth is unwound at constant tension through the winding and rewinding device 13 and directly sent to the cloth car through the swing-type cloth discharging device.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A water-saving circulation system based on warp beam dyeing, characterized in that: It comprises a dye vat (8), a warp beam, a water inlet pipe, a drain pipe, a color fixing mechanism, a cloth feeding mechanism, a cloth discharging mechanism, a sampling cup, a reversing valve and a preparatory vat, wherein the reversing valve switches the interface connection state between the water inlet pipe, the drain pipe and the dye vat (8), and the preparatory vat dyeing process comprises the following steps: S1, feeding the fabric to be dyed into the dyeing vat (8) through the fabric feeding mechanism, winding the fabric to be dyed onto the warp beam, and pre-filling the preparation vat with dyeing liquid; S2, extracting dye liquid from the preparation tank through the water inlet pipe and injecting it into the dye tank (8), performing warp overflow dyeing and dyeing water replenishment on the fabric through the warp beam until the dyeing process is completed, discharging the remaining dye liquid after dyeing and washing in the dye tank (8) through the drain pipe into the preparation tank, drying the fabric, and draining the dye liquid into the dye tank (8); S3, after the dye vat (8) is drained, the dye vat (8) is opened, the preparatory vat is filled with water, the color accuracy of the fabric in the preparatory vat and the dye solution in the dye vat (8) is observed through a sampling cup, and the solubility of the dye in the dye solution is adjusted according to the color matching result; S4, after the color accuracy is adjusted to be consistent, the dye vat (8) is closed, the dye vat (8) draws the dye liquid in the preparatory vat through the water inlet pipe, and a color fixing agent is added to perform reduction cleaning on the fabric in the dye vat (8), and the remaining dye liquid after the reduction cleaning in the dye vat (8) is discharged into the preparatory vat through the drain pipe, and the fabric in the dye vat (8) is dried and fixed; S5, adding clean water into the dye vat (8) through the water inlet pipe, adding a neutralizing agent to the clean water in the dye vat (8) to perform a first neutralization cleaning on the fabric, and draining the neutralization cleaning liquid into the preparatory vat through the drain pipe after the first neutralization cleaning is completed; S6, the neutralization cleaning liquid in the preparation tank is replenished with water and the neutralization degree is adjusted by a neutralizer, and the adjusted neutralization cleaning liquid is pumped into the dye tank (8) through the water inlet pipe for a second neutralization cleaning. After the second neutralization cleaning is completed, the neutralization cleaning liquid is drained into the preparation tank through the drain pipe, and the dye tank (8) is opened to discharge the cloth through the cloth discharge mechanism; The reversing valve (15) comprises a four-way valve body (17) and a movable valve portion (18), wherein the movable valve portion (18) is driven by a driving motor, and the inner wall of the four-way valve body (17) is provided with four flow channels (21), and the top end of the movable valve portion (18) is provided with a spherical valve flap (19), and the spherical valve flap (19) is provided with a half-moon-shaped valve groove (20) for switching and connecting two of the four flow channels (21).

2. A water-saving circulation system based on warp beam dyeing according to claim 1, characterized in that: The dyeing tank (8) and the preparation tank are equipped with a liquid pump for sucking the dyeing liquid.

3. A water-saving circulation system based on warp beam dyeing according to claim 2, characterized in that: The dye liquor discharged into the preparation tank in step S3 is reused for the dyeing process in step S4.

4. A water-saving circulation system based on warp beam dyeing according to claim 3, characterized in that: The dye liquor discharged into the preparation tank in step S4 is reused for neutralization and cleaning in step S6.

5. A water-saving circulation system based on warp beam dyeing according to claim 4, characterized in that: The preparatory cylinders are equipped with a plurality of groups, the preparatory cylinders are exchangeably connected to each other via connecting pipes, and a stop valve (16) is provided to control the connection of the connecting pipes.

6. The water-saving circulation system based on warp beam dyeing according to claim 1, characterized in that: The dye vat (8) comprises a water distribution plate (2) arranged at the top and a vat body (3) located at the outside, a water collector (6) and a main pump (7) are arranged at the bottom of the vat body (3), and a plurality of guide grooves (5) and water flow channels (4) are arranged symmetrically relative to the water distribution plate (2) and the water collector (6) on the outside of the vat body (3).

7. The water-saving circulation system based on warp beam dyeing according to claim 6, characterized in that: The dye vat (8) is equipped with a winding machine, which comprises a cloth feeding frame (9) movable by rollers, a width expansion and centering device (10), two movable rollers (11), a synchronous adjustment wheel group (12), a winding and rewinding device (13) and a winding swing arm (14).

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