Recovery device for treating fluid and digital printing pretreatment method

Abstract

The invention discloses a recovery device for treating fluid and a digital printing pretreatment method.The recovery device comprises a guide roller set, a fluid collecting roller set, a fluid collecting conveying belt and a fluid collecting box, and the guide roller set comprises a first guide roller and a second guide roller; a conveying area for conveying woven cloth is arranged between the first guide roller and the second guide roller; the liquid collecting roller group comprises a first liquid collecting roller and a second liquid collecting roller; the first liquid collecting roller is parallel to the first guide roller; the liquid collecting conveyor belt is connected end to end and sleeves the first liquid collecting roller and the second liquid collecting roller; the liquid collecting conveying belt is positioned below the conveying area; the liquid collecting conveying belt can adsorb liquid and release the liquid when being extruded; a part of the liquid collecting conveyor belt is clamped between the first liquid collecting roller and the first guide roller; and at least part of the liquid collecting box is located under the first guide roller and the first liquid collecting roller. The problems of treating fluid waste and environment pollution can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of digital printing, and in particular to a recovery device for treatment liquid and a digital printing pretreatment method. Background Art

[0002] Compared with traditional printing, digital printing has many outstanding advantages, such as better printing effects and more flexible production. Regarding digital printing, in the relevant technology, before inkjet printing, it is usually necessary to pre-treat the fabric (woven fabric) to improve the adhesion of the ink. The pretreatment usually includes two steps: soaking and drying. Soaking refers to immersing the fabric in a treatment liquid with a specific component ratio. During this period, the fabric can also be rolled by equipment such as a rolling car to improve the fabric's absorption of the treatment liquid, that is, to increase the fabric's liquid-carrying rate. Generally, it is necessary to ensure that the fabric's liquid-carrying rate reaches 70%. Fabrics with sufficient liquid-carrying rates can form a sufficient adhesion layer in the subsequent drying step for attaching subsequent inks.

[0003] Therefore, the surface of the impregnated fabric often has a high liquid content. During the subsequent transmission process, part of the treatment liquid on the surface will drip, which not only causes waste but also pollutes the working environment. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a recovery device for treatment liquid and a digital printing pretreatment method, which can improve the problems of treatment liquid waste and environmental pollution.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] On the one hand, the present application provides a recovery device for treating liquid, comprising a guide roller group, a liquid collecting roller group, a liquid collecting conveyor belt and a liquid collecting box, wherein the guide roller group comprises a first guide roller and a second guide roller, the first guide roller being located above the second guide roller; a conveying area for conveying the woven fabric between the first guide roller and the second guide roller is provided between the first guide roller and the second guide roller; the conveying area passes through the top of the first guide roller and the bottom of the second guide roller; the liquid collecting roller group comprises a first liquid collecting roller and a second liquid collecting roller; the first liquid collecting roller is parallel to the first guide roller and is located below the first guide roller; the liquid collecting conveyor belt is connected end to end and is sleeved outside the first liquid collecting roller and the second liquid collecting roller, and can move under the drive of the first liquid collecting roller and / or the second liquid collecting roller; the liquid collecting conveyor belt is located below the conveying area; the liquid collecting conveyor belt can absorb liquid and release liquid when squeezed; part of the liquid collecting conveyor belt is sandwiched between the first liquid collecting roller and the first guide roller; the liquid collecting box is at least partially located directly below the first guide roller and the first liquid collecting roller.

[0007] Furthermore, the recovery device also includes a liquid discharge component, which includes a liquid discharge roller and a liquid discharge conveyor belt, the liquid discharge roller is parallel to the first liquid collection roller and is located above the conveying area; the liquid discharge conveyor belt is connected end to end and is arranged outside the first liquid collection roller and the liquid discharge roller, and can move under the drive of the first liquid collection roller and / or the liquid discharge roller; along the axial direction of the first liquid collection roller, the liquid discharge conveyor belt is located on one side of the liquid collection conveyor belt; the liquid discharge conveyor belt can absorb liquid and release liquid when squeezed; the interior of the first liquid collection roller is provided with a liquid collection channel for guiding the liquid squeezed out of the liquid collection conveyor belt to the liquid discharge conveyor belt; the recovery device also includes an extrusion member, and part of the liquid discharge conveyor belt is sandwiched between the liquid discharge roller and the extrusion member; the interior of the liquid discharge roller is provided with a liquid discharge channel for guiding the liquid squeezed out of the liquid collection conveyor belt along the axial direction of the liquid discharge roller.

[0008] Furthermore, a liquid collecting cavity is provided inside the first liquid collecting roller, and a first liquid inlet hole and a first liquid outlet hole connected to the liquid collecting cavity are provided on the outer peripheral wall of the first liquid collecting roller; the first liquid inlet hole, the liquid collecting cavity and the first liquid outlet hole are connected in sequence to form the liquid collecting channel; during the movement of the liquid collecting conveyor belt, the liquid collecting conveyor belt can cover at least a portion of the first liquid inlet hole; during the movement of the liquid discharging conveyor belt, the liquid discharging conveyor belt can cover at least a portion of the first liquid outlet hole.

[0009] Furthermore, along the axial direction of the first liquid collecting roller, a convex structure is provided in the middle of the liquid collecting cavity, and a liquid collecting inclined surface for guiding the liquid in the middle of the liquid collecting cavity to two ends is provided on the convex structure.

[0010] Furthermore, a liquid discharge cavity is provided inside the liquid discharge roller, and a second liquid inlet hole and a second liquid outlet hole connected to the liquid discharge cavity are provided on the outer peripheral wall of the liquid discharge roller; the second liquid inlet hole, the liquid discharge cavity and the second liquid outlet hole are connected in sequence to form the liquid discharge channel; during the movement of the liquid discharge conveyor belt, the liquid discharge conveyor belt can cover at least a portion of the second liquid inlet hole; the second liquid outlet hole is located above the conveying area.

[0011] Furthermore, a concave structure is provided in the middle of the liquid discharge cavity along the axial direction of the liquid discharge roller, and a liquid discharge slope for guiding the liquid at both ends of the liquid discharge cavity to the middle is provided on the concave structure.

[0012] Furthermore, the recovery device also includes a mounting platform, a main frame and a lifting assembly, the main frame is located above the mounting platform; the first guide roller, the first liquid collecting roller and the liquid releasing roller are all rotatably connected to the main frame, and the extrusion piece is connected to the main frame; along the axial direction of the first liquid collecting roller, one side of the main frame is rotatably connected to the mounting platform and has a rotation axis, the rotation axis is perpendicular to the axial direction of the first liquid collecting roller and is horizontally arranged; the lifting assembly is installed on the mounting platform and can lift the main frame upward so that the main frame rotates around the rotation axis.

[0013] Furthermore, the recovery device also includes a base plate, a mounting platform and a main frame, the mounting platform is located above the base plate, and a lifting drive component is connected between the mounting platform and the base plate for lifting the mounting platform in a vertical direction; the main frame is connected to the mounting platform; the first guide roller and the first liquid collection roller are both rotatably connected to the main frame.

[0014] Furthermore, a plane passing through the central axis of the first guide roller and the central axis of the first liquid collecting roller at the same time is defined as a preset plane, and the angle between the preset plane and any horizontal plane is in the range of 35° to 80°; during the movement of the liquid collecting conveyor belt, it first passes under the first liquid collecting roller, then passes over the first liquid collecting roller, and then passes through the second liquid collecting roller.

[0015] On the other hand, the present application provides a digital printing pretreatment method, comprising the following steps:

[0016] Slurrying: 1-2 parts of sodium alginate, 6-9 parts of urea, 3-5 parts of sodium sulfate, 2-4 parts of sodium bicarbonate, and 10-13 parts of water are mixed and stirred evenly to obtain a treatment liquid; and the treatment liquid is poured into a soaking padder;

[0017] Weft straightening: correcting the weft skew of the fabric on a weft straightening machine;

[0018] Sizing, the fabric passes through the impregnation padder and is immersed in and absorbs the treatment liquid in the impregnation padder;

[0019] The conveyor is provided with a recovery device as described in any one of claims 1 to 9, and the fabric passes through the conveyor area and is conveyed backward by the recovery device. During the conveying, the treatment liquid dripping on the fabric can be caught and adsorbed by the liquid collecting conveyor belt. When the liquid collecting conveyor belt moves to between the first liquid collecting roller and the first guide roller, the liquid collecting conveyor belt can be squeezed and release the treatment liquid, so that the treatment liquid falls into the liquid collecting tank;

[0020] Drying: Drying the fabrics sent through the recovery device.

[0021] The benefit of the present application lies in that by arranging a liquid collecting conveyor belt with liquid absorption capability below the conveying area, the treatment liquid dripping on the fabric can be received and simultaneously transferred to the top of the liquid collecting tank. Here, the first guide roller not only has the function of guiding the fabric, but can also cooperate with the first liquid collecting roller to squeeze the liquid collecting conveyor belt to squeeze the treatment liquid out into the liquid collecting tank, thereby reducing the waste of treatment liquid and improving the problem of polluting the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a recovery device provided in an embodiment of the present application;

[0023] Figure 2 yes Figure 1 A partial structural diagram of the recovery device in FIG. 1 shows the rotating structure of the main frame;

[0024] Figure 3 yes Figure 1 A schematic diagram of a partial structural section of the recovery device, showing the transmission relationship of the guide roller group, the liquid collection roller group and other components;

[0025] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle guide roller group, liquid collecting roller group and liquid discharge roller;

[0026] Figure 5 yes Figure 4 Schematic diagram of the structure of the liquid collecting roller group, the liquid discharging roller and the liquid discharging conveyor belt;

[0027] Figure 6 It is a partial cross-sectional structural schematic diagram of the four liquid collecting roller groups, the liquid discharging rollers and the liquid discharging conveyor belt.

[0028] Description of symbols

[0029] 100. Recovery device;

[0030] 101. Dip padder;

[0031] 102. Drying device;

[0032] 103. Liquid collecting tank;

[0033] 104. A first driving member;

[0034] 105. A second driving member;

[0035] 106. Weaving;

[0036] 11. Bottom plate;

[0037] 12. Mounting platform; 121. Lifting drive member; 122. Mounting base;

[0038] 13. Lifting assembly; 131. Lifting drive member; 1311. Arc-shaped protrusion;

[0039] 14. Main frame; 141. Side frame; 142. Connecting part; 143. Extension part; 144. Additional shell part; 145. Rotating part;

[0040] 15. guide roller group; 151. first guide roller; 152. second guide roller; 153. conveying area;

[0041] 16, liquid collecting roller group; 161, first liquid collecting roller; 1611, liquid collecting channel; 1611a, first liquid inlet hole; 1611b, liquid collecting cavity; 1611c, first liquid outlet hole; 1612, protruding structure; 1613, liquid collecting inclined surface; 162, second liquid collecting roller;

[0042] 17. Liquid collection conveyor belt;

[0043] 18, liquid discharge assembly; 181 liquid discharge roller; 1811, liquid discharge channel; 1811a, second liquid inlet hole; 1811b, liquid discharge cavity; 1811c, second liquid outlet hole; 1812, recessed structure; 1813, liquid discharge slope; 182, liquid discharge conveyor belt;

[0044] 19. Extrusion part; 191. Extrusion roller; 192. Elastic sleeve. DETAILED DESCRIPTION

[0045] In order to clearly explain the technical solution of the present application, the following definitions are also defined with reference to the front, back, left, right, top, and bottom of the recovery device 100 placed on the ground and working normally: Figure 1 The front side, rear side, left side, right side, upper side and lower side are shown. It is worth noting that the parallel mentioned in the present application is not completely parallel, but a small deviation is allowed, and the deviation value can be within the range of ±10°.

[0046] refer to Figure 1 The present application provides a recovery device 100 for a treatment liquid, which is used to be arranged between a dipping padder 101 and a drying device 102 in a digital printing pretreatment process, and can transfer the dipping fabric 106 backward to the drying device 102. At the same time, during the transfer process, the dripping treatment liquid can be recovered to avoid waste and pollution of the working environment.

[0047] refer to Figure 2 and Figure 3The recovery device 100 includes a guide roller group 15, a liquid collecting roller group 16, a liquid collecting conveyor belt 17 and a liquid collecting tank 103. The guide roller group 15 is used to guide the fabric 106 to convey the fabric 106 from the impregnation padder 101 to the drying device 102. The liquid collecting roller group 16 can drive the liquid collecting conveyor belt 17 to move, and the liquid collecting conveyor belt 17 is located below the fabric 106 and is used to receive the treatment liquid dripping from the fabric 106 and convey it back to the vicinity of the liquid collecting tank 103.

[0048] In some embodiments, the guide roller group 15 includes a first guide roller 151 and a second guide roller 152, and the first guide roller 151 is located obliquely above the second guide roller 152. A conveying area 153 for the fabric 106 to be conveyed between the first guide roller 151 and the second guide roller 152 is formed between the first guide roller 151 and the second guide roller 152. The conveying area 153 can be understood as the space area occupied by the fabric 106 when it moves between the first guide roller 151 and the second guide roller 152, and the space area includes the range of the fabric 106 to vibrate and move appropriately up and down. The conveying area 153 passes through the top of the first guide roller 151 and the bottom of the second guide roller 152, that is, the fabric 106 bypasses the first guide roller 151 from the upper side of the first guide roller 151. It bypasses the second guide roller 152 from the lower side of the second guide roller 152.

[0049] In some specific embodiments, the first guide roller 151 may be a guide structure near the outlet of the soaking padder 101 , that is, the soaking padder 101 and the recovery device 100 share the first guide roller 151 .

[0050] In some specific embodiments, the second guide roller 152 may be a guide structure near the entrance of the drying device 102 , that is, the drying device 102 and the recovery device 100 share the second guide roller 152 .

[0051] In some embodiments, the recovery device 100 is provided with a first driving member 104, which can be a motor. The first driving member 104 drives the first guide roller 151 to rotate through a pulley or other components (see Figure 2 In other embodiments, the first driving member 104 drives the second guide roller 152 to rotate through a pulley or other components (not shown). In other embodiments, two first driving members 104 are provided, which respectively drive the first guide roller 151 and the second guide roller 152 to rotate through a pulley or other components (not shown).

[0052] In some embodiments, the liquid collecting roller group 16 includes a first liquid collecting roller 161 and a second liquid collecting roller 162. The first liquid collecting roller 161 is arranged close to the first guide roller 151 and is located directly below or obliquely below the first guide roller 151. The first liquid collecting roller 161 is parallel to the first guide roller 151. The second liquid collecting roller 162 is arranged close to the second guide roller 152 and is located obliquely downward of the second guide roller 152. The second liquid collecting roller 162 may be parallel to the second guide roller 152. The liquid collecting conveyor belt 17 is connected end to end and is sleeved outside the first liquid collecting roller 161 and the second liquid collecting roller 162, and can move under the drive of the first liquid collecting roller 161 and / or the second liquid collecting roller 162. The liquid collecting conveyor belt 17 is located below the conveying area 153, so that the liquid collecting conveyor belt 17 can receive the dripping treatment liquid. The liquid collecting conveyor belt 17 is made of a material that can absorb liquid and release the liquid when squeezed. For example, the liquid collecting conveyor belt 17 may optionally include a support layer and an absorption layer. The support layer is used to ensure that the liquid collecting conveyor belt 17 has sufficient strength to move normally around the first liquid collecting roller 161 and the second liquid collecting roller 162. The absorption layer may be a cotton fabric layer, a sponge layer, or other material layer that has the ability to temporarily store liquid.

[0053] Part of the liquid collecting conveyor belt 17 is sandwiched between the first liquid collecting roller 161 and the first guide roller 151, so the liquid collecting conveyor belt 17 can be squeezed and release the treatment liquid when passing between the first liquid collecting roller 161 and the first guide roller 151. The liquid collecting tank 103 is at least partially located directly below the first guide roller 151 and the first liquid collecting roller 161, so the treatment liquid released by squeezing the liquid collecting conveyor belt 17 can be recovered into the liquid collecting tank 103, thereby avoiding waste of treatment liquid and pollution of the working environment.

[0054] In some specific embodiments, when the conveying area 153, the second guide roller 152 and the liquid collecting conveyor belt 17 are observed from above, the portion of the conveying area 153 close to the second guide roller 152 is located within the range of the liquid collecting conveyor belt 17, and the second guide roller 152 is also located within the range of the liquid collecting conveyor belt 17. It should be noted that the amount of treatment liquid dripped from the fabric 106 before it reaches the second guide roller 152 is not very much, and when the fabric 106 reaches the second guide roller 152, more treatment liquid will be precipitated due to the guidance and extrusion of the fabric 106 by the second guide roller 152. In this embodiment, by making the coverage of the liquid collecting conveyor belt 17 basically cover the conveying area 153 and the lower part of the second guide roller 152, the treatment liquid precipitated by the extrusion of the second guide roller 152 can be relatively completely received and absorbed by the liquid collecting conveyor belt 17.

[0055] In some specific embodiments, a plane passing through the central axis of the first guide roller 151 and the central axis of the first liquid collecting roller 161 is defined as a preset plane, and the angle α between the preset plane and any horizontal plane ranges from 35° to 80°, wherein the angle α can be further selected to be 35° to 45°. During the movement, the liquid collecting conveyor belt 17 first passes under the first liquid collecting roller 161, then passes over the first liquid collecting roller 161, and then passes through the second liquid collecting roller 162. In this way, the part to be squeezed of the liquid collecting conveyor belt 17 can move from bottom to top to the first guide roller 151, and even if the treatment liquid precipitated by squeezing flows downward, it is not easy to be absorbed back by the liquid collecting conveyor belt 17 in large quantities, because the liquid content of the part to be squeezed of the liquid collecting conveyor belt 17 is originally high, and the amount of liquid that can be absorbed back is limited, so that more treatment liquid can be recovered.

[0056] In some specific embodiments, the conveying speed of the liquid collecting conveyor belt 17 is lower than the conveying speed of the fabric 106. Specifically, the ratio of the conveying speed of the liquid collecting conveyor belt 17 to the conveying speed of the fabric 106 is in the range of 0.1 to 0.5. Such a configuration can increase the amount of liquid collected per unit area of ​​the liquid collecting conveyor belt 17, because the amount of treatment liquid that can drip from the fabric 106 is not very large. If the movement speed of the liquid collecting conveyor belt 17 is high, it is very likely that the amount of liquid adsorbed per unit area of ​​the liquid collecting conveyor belt 17 is squeezed by the first guide roller 151 before it reaches saturation, which will drive the liquid collecting conveyor belt 17 to move with low work efficiency.

[0057] In some specific embodiments, the liquid collecting tank 103 may be a box structure inside the soaking material padder 101 , that is, the soaking material padder 101 and the recovery device 100 share the liquid collecting tank 103 .

[0058] In some specific embodiments, the recovery device 100 is provided with a second driving member 105, which can be a motor. The second driving member 105 drives the first liquid collecting roller 161 to rotate through a pulley and other components (see Figure 2 In other embodiments, the second driving member 105 drives the second liquid collecting roller 162 to rotate through a pulley or other components (not shown). In other embodiments, two second driving members 105 are provided, which respectively drive the first liquid collecting roller 161 and the second liquid collecting roller 162 to rotate through a pulley or other components (not shown).

[0059] refer to Figure 3 and Figure 4In some embodiments, the recovery device 100 further includes a liquid discharge component 18, and the liquid discharge component 18 includes a liquid discharge roller 181 and a liquid discharge conveyor belt 182. The liquid discharge roller 181 is parallel to the first liquid collection roller 161 and is located above the conveying area 153. The liquid discharge conveyor belt 182 is connected end to end and is sleeved outside the first liquid collection roller 161 and the liquid discharge roller 181, and can move under the drive of the first liquid collection roller 161 and / or the liquid discharge roller 181. Along the axial direction of the first liquid collection roller 161, the liquid discharge conveyor belt 182 is located on one side of the liquid collection conveyor belt 17. In some specific embodiments, two liquid discharge conveyor belts 182 are provided, which are respectively located on both sides of the liquid collection conveyor belt 17. The liquid discharge conveyor belt 182 is made of a material that can absorb liquid and release the liquid when squeezed. For example, the liquid discharge conveyor belt 182 may optionally include a support layer and an absorption layer. The support layer is used to ensure that the liquid discharge conveyor belt 182 has sufficient strength to move normally around the first liquid collection roller 161 and the liquid discharge roller 181. The absorption layer may be a cotton fabric layer, a sponge layer, or other material layer that has the ability to temporarily store liquid.

[0060] The recovery device 100 further includes an extrusion member 19 , and a portion of the discharge conveyor belt 182 is sandwiched between the discharge roller 181 and the extrusion member 19 . The discharge conveyor belt 182 can be squeezed at the extrusion member 19 and the treatment liquid can be precipitated.

[0061] refer to Figure 5 and Figure 6 , a liquid collecting channel 1611 is provided inside the first liquid collecting roller 161 for guiding the liquid squeezed out from the liquid collecting conveyor belt 17 to the liquid discharging conveyor belt 182. A liquid collecting cavity 1611b is provided inside the first liquid collecting roller 161, and a first liquid inlet hole 1611a and a first liquid outlet hole 1611c communicating with the liquid collecting cavity 1611b are provided on the outer peripheral wall of the first liquid collecting roller 161. The first liquid inlet hole 1611a, the liquid collecting cavity 1611b and the first liquid outlet hole 1611c are connected in sequence to form the liquid collecting channel 1611. During the movement of the liquid collecting conveyor belt 17, the liquid collecting conveyor belt 17 can cover at least a portion of the first liquid inlet hole 1611a. During the movement of the liquid discharging conveyor belt 182, the liquid discharging conveyor belt 182 can cover at least a portion of the first liquid outlet hole 1611c. The treated liquid squeezed out on the liquid collecting conveyor belt 17 can enter the liquid collecting chamber 1611b through the first liquid inlet hole 1611a and flow along the axial direction of the first liquid collecting roller 161. Part of the treated liquid can flow out from the first liquid outlet hole 1611c and be adsorbed by the liquid discharge conveyor belt 182.

[0062] The inside of the discharge roller 181 is provided with a discharge channel 1811 for guiding the liquid pressed out from the discharge conveyor belt 182 along the axial direction of the discharge roller 181. The inside of the discharge roller 181 is provided with a discharge cavity 1811b, and the outer peripheral wall of the discharge roller 181 is provided with a second liquid inlet hole 1811a and a second liquid outlet hole 1811c connected to the discharge cavity 1811b. The second liquid inlet hole 1811a, the discharge cavity 1811b and the second liquid outlet hole 1811c are connected in sequence to form the discharge channel 1811. During the movement of the discharge conveyor belt 182, the discharge conveyor belt 182 can cover at least a part of the second liquid inlet hole 1811a. The second liquid outlet hole 1811c is located above the conveying area 153. The treated liquid squeezed out on the liquid discharge conveyor belt 182 can flow into the liquid discharge chamber 1811b through the second liquid inlet hole 1811a and flow axially along the liquid discharge roller 181. Part of the treated liquid can flow out from the second liquid outlet hole 1811c and fall onto the fabric 106 below it, so as to replenish the treated liquid for the fabric 106 and improve its liquid carrying rate.

[0063] In some specific embodiments, along the axial direction of the first liquid collecting roller 161, a protruding structure 1612 is provided in the middle of the liquid collecting chamber 1611b, and the protruding structure 1612 is annular and surrounds the inner circumferential wall of the liquid collecting chamber 1611b. A liquid collecting inclined surface 1613 for guiding the liquid in the middle of the liquid collecting chamber 1611b to both ends is provided on the protruding structure 1612. Such a configuration is conducive to guiding the treated liquid to the first liquid outlet 1611c faster and more. Furthermore, around the circumference of the first liquid collecting roller 161, the first liquid inlet hole 1611a and the first liquid outlet hole 1611c are arranged in multiple rows, and each row is provided with multiple holes. The number of rows of the first liquid outlet hole 1611c is more than that of the first liquid inlet hole 1611a, and it can be selected that the first liquid outlet hole 1611c is provided with eight rows, and the first liquid inlet hole 1611a is provided with two rows. Such an arrangement can prevent the processing liquid from easily flowing out of the first liquid inlet hole 1611a during the process of flowing in the liquid receiving chamber 1611b.

[0064] In some specific embodiments, a recessed structure 1812 is provided in the middle of the discharge chamber 1811b along the axial direction of the discharge roller 181, and the recessed structure 1812 is annular and surrounds the inner circumferential wall of the discharge chamber 1811b. A discharge slope 1813 is provided on the recessed structure 1812 for guiding the liquid at both ends of the discharge chamber 1811b to the middle. Such a configuration is conducive to guiding the treated liquid to the second liquid outlet 1811c faster and more. Furthermore, around the circumference of the discharge roller 181, the second liquid inlet 1811a and the second liquid outlet 1811c are arranged in multiple rows, and each row is provided with multiple holes. The number of rows of the second liquid outlet 1811c is more than that of the second liquid inlet 1811a, and it can be selected that the second liquid outlet 1811c is provided with eight rows, and the second liquid inlet 1811a is provided with two rows. This arrangement can prevent the treatment liquid from flowing out of the second liquid inlet hole 1811a during the process of flowing in the liquid discharge chamber 1811b. In addition, along the axial direction of the liquid discharge roller 181, a gap is left between the second liquid inlet hole 1811a and the wall of the liquid discharge chamber 1811b.

[0065] In some specific embodiments, the extrusion member 19 includes an extrusion roller 191 and an elastic sleeve 192. The elastic sleeve 192 is sleeved on the outer periphery of the extrusion roller 191. The elastic deformation ability of the elastic sleeve 192 can better extrude the liquid discharge conveyor belt 182. Two extrusion members 19 are provided, both parallel to the liquid discharge roller 181, and both abut against the outer surface of the liquid discharge roller 181. One of the extrusion members 19 is located above the liquid discharge roller 181, and the other extrusion member 19 is located obliquely below the liquid discharge roller 181.

[0066] refer to Figure 2 and Figure 3 In some embodiments, the recovery device 100 further includes a mounting platform 12, a main frame 14, and a lifting assembly 13. The main frame 14 is located above the mounting platform 12, and one side of the main frame 14 is rotatably connected to the mounting platform 12 and has a rotation axis. The lifting assembly 13 is installed on the mounting platform 12 and can lift the main frame 14 upward so that the main frame 14 rotates around the rotation axis.

[0067] The main frame 14 includes a side frame 141, a connecting portion 142, an extension portion 143, an additional housing portion 144 and a rotating portion 145. The side frame 141 is provided with two pieces, and is arranged at intervals on the left and right. The connecting portion 142 is fixedly connected between the two side frame portions 141. The extension portion 143 and the rotating portion 145 are respectively located on the left and right sides of the entire main frame 14. The lifting assembly 13 acts on the extension portion 143. The mounting base 122 is fixed on the mounting platform 12. The rotating portion 145 is rotatably connected to the mounting base 122, and the rotation axis is perpendicular to the axial direction of the first liquid collection roller 161 and is arranged horizontally. The additional housing portion 144 is covered on the outside of the side frame 141 and is fixed to the extension portion 143 and the side frame 141.

[0068] In some specific embodiments, the jacking assembly 13 includes multiple jacking driving components 131, which can be selected as air cylinders, electric cylinders or oil cylinders. The driving end of the jacking driving component 131 is provided with an arc-shaped protrusion 1311, which protrudes upward and abuts against the lower surface of the extension 143.

[0069] In some embodiments, the first guide roller 151, the first liquid collecting roller 161, the liquid discharging roller 181 and the extrusion member 19 are all rotatably connected to the main frame 14. Specifically, the first guide roller 151, the first liquid collecting roller 161, the liquid discharging roller 181 and the extrusion member 19 are all located between the two side frame parts 141, and the first guide roller 151, the first liquid collecting roller 161 and the liquid discharging roller 181 are all rotatably connected to the side frame part 141, and the extrusion member 19 is rotatably connected to the additional shell part 144.

[0070] When the lifting assembly 13 drives the entire main frame 14 to rotate, the first guide roller 151 will tilt sideways. The purpose of this arrangement is that when the woven fabric 106 transmitted to the first guide roller 151 has a weft skew problem, the appropriately tilted first guide roller 151 can change the movement speed of the parts of the woven fabric 106 at different widths, thereby improving the weft skew problem.

[0071] It should also be noted that when the first guide roller 151 drives the fabric 106 to tilt, along the width direction of the fabric 106, i.e., the left-right direction, the liquid carrying rate of the fabric 106 at a relatively high position is lower than that at a relatively low position, resulting in an unbalanced liquid carrying rate. At this time, the tilted discharge roller 181 and the discharge conveyor belt 182 can improve the problem of unbalanced liquid carrying rate. Specifically, since there is a gap between the second liquid inlet hole 1811a and the wall of the discharge cavity 1811b along the axial direction of the discharge roller 181, a certain amount of treatment liquid will accumulate in the lower end of the discharge roller 181, and will not flow toward the middle of the discharge roller 181, that is, it will not flow to the second liquid outlet hole 1811c, which means that less treatment liquid flows out of the second liquid outlet hole 1811c at a lower position. The treated liquid precipitated from the higher end of the discharge roller 181 will flow downward from high to low without accumulation, which means that more treated liquid can flow out of the second liquid outlet 1811c at a higher position, which can just replenish the higher part of the fabric 106.

[0072] refer to Figure 1 and Figure 3In some embodiments, the recovery device 100 further includes a bottom plate 11, a mounting platform 12 is located above the bottom plate 11, and a lifting drive 121 for lifting the mounting platform 12 in a vertical direction is connected between the mounting platform 12 and the bottom plate 11, and the lifting drive 121 can be selected as a cylinder, an electric cylinder or an oil cylinder. With such a configuration, the height of the first guide roller 151 can be changed, and the inclination of the fabric 106 in the conveying area 153 can also be changed, thereby changing the difficulty of dripping of the treatment liquid. When the fabric 106 used is a fabric 106 with poor adhesion to the treatment liquid, the height of the first guide roller 151 can be appropriately increased to increase the inclination of the fabric 106, so that the treatment liquid attached to the fabric 106 is not easy to drip directly from the fabric 106, and a good liquid carrying rate can be maintained. When the treatment liquid adhesion ability of the fabric 106 used is strong, the height of the first guide roller 151 can be appropriately lowered to reduce the difficulty of tilting the fabric 106, so that the liquid carrying rate of the fabric 106 can be maintained above the qualified line. In addition, after the inclination is reduced, the unevenness of the liquid carrying rate of each area on the fabric 106 along the transmission direction of the fabric 106 can be better controlled.

[0073] The present application provides a digital printing pretreatment method, comprising the following steps:

[0074] Slurrying: 1-2 parts of sodium alginate, 6-9 parts of urea, 3-5 parts of sodium sulfate, 2-4 parts of sodium bicarbonate, and 10-13 parts of water are mixed and stirred to obtain a treatment liquid; and the treatment liquid is poured into the soaking padder 101;

[0075] Weft straightening, correcting the weft skew of the fabric 106 on a weft straightening machine;

[0076] Sizing, the fabric 106 passes through the impregnation padder 101, and is immersed in and absorbs the treatment liquid in the impregnation padder 101;

[0077] Conveying, a recovery device 100 as described above is provided, and the fabric 106 is conveyed backward through the conveying area 153 by the recovery device 100. During the conveying, the treatment liquid dripping on the fabric 106 can be caught and adsorbed by the liquid collecting conveyor belt 17. When the liquid collecting conveyor belt 17 moves to between the first liquid collecting roller 161 and the first guide roller 151, the liquid collecting conveyor belt 17 can be squeezed and release the treatment liquid, so that the treatment liquid falls into the liquid collecting tank 103;

[0078] Drying: Drying the fabric 106 conveyed by the recovery device 100.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A recovery device for a treatment liquid, characterized in that: include: A guide roller group, the guide roller group includes a first guide roller and a second guide roller, the first guide roller is located above the second guide roller; a conveying area for conveying the fabric between the first guide roller and the second guide roller is provided between the first guide roller and the second guide roller; the conveying area passes through the top of the first guide roller and the bottom of the second guide roller; A liquid collecting roller group, the liquid collecting roller group comprising a first liquid collecting roller and a second liquid collecting roller; the first liquid collecting roller is parallel to the first guide roller and is located below the first guide roller; a liquid collecting conveyor belt, which is connected end to end and sleeved outside the first liquid collecting roller and the second liquid collecting roller, and can move under the drive of the first liquid collecting roller and / or the second liquid collecting roller; The liquid collecting conveyor belt is located below the conveying area; the liquid collecting conveyor belt can absorb liquid and release liquid when squeezed; a portion of the liquid collecting conveyor belt is sandwiched between the first liquid collecting roller and the first guide roller; A liquid collecting box, wherein at least a portion of the liquid collecting box is located directly below the first guide roller and the first liquid collecting roller.

2. A recovery device for treatment liquid according to claim 1, characterized in that: The recovery device further comprises a liquid discharge assembly, the liquid discharge assembly comprising a liquid discharge roller and a liquid discharge conveyor belt, the liquid discharge roller is parallel to the first liquid receiving roller and is located above the conveying area; the liquid discharge conveyor belt is connected end to end and is sleeved outside the first liquid receiving roller and the liquid discharge roller, and can move under the drive of the first liquid receiving roller and / or the liquid discharge roller; along the axial direction of the first liquid receiving roller, the liquid discharge conveyor belt is located on one side of the liquid receiving conveyor belt; the liquid discharge conveyor belt can absorb liquid and release liquid when squeezed; The first liquid collecting roller has a liquid collecting channel inside for guiding the liquid squeezed out from the liquid collecting conveyor belt to the liquid discharging conveyor belt; the recovery device also includes an extrusion member, and part of the liquid discharging conveyor belt is sandwiched between the liquid discharging roller and the extrusion member; the liquid discharging roller has a liquid discharging channel inside for guiding the liquid squeezed out from the liquid discharging conveyor belt along the axial direction of the liquid discharging roller.

3. A recovery device for treatment liquid according to claim 2, characterized in that: A liquid collecting cavity is provided inside the first liquid collecting roller, and a first liquid inlet hole and a first liquid outlet hole connected to the liquid collecting cavity are provided on the outer peripheral wall of the first liquid collecting roller; the first liquid inlet hole, the liquid collecting cavity and the first liquid outlet hole are connected in sequence to form the liquid collecting channel; during the movement of the liquid collecting conveyor belt, the liquid collecting conveyor belt can cover at least a portion of the first liquid inlet hole; during the movement of the liquid discharging conveyor belt, the liquid discharging conveyor belt can cover at least a portion of the first liquid outlet hole.

4. A recovery device for treatment liquid according to claim 3, characterized in that: A convex structure is provided in the middle of the liquid collecting cavity along the axial direction of the first liquid collecting roller, and a liquid collecting inclined surface for guiding the liquid in the middle of the liquid collecting cavity to two ends is provided on the convex structure.

5. A recovery device for treatment liquid according to claim 3, characterized in that: A discharge cavity is provided inside the discharge roller, and a second liquid inlet hole and a second liquid outlet hole connected to the discharge cavity are provided on the outer peripheral wall of the discharge roller; the second liquid inlet hole, the discharge cavity and the second liquid outlet hole are connected in sequence to form the discharge channel; during the movement of the discharge conveyor belt, the discharge conveyor belt can cover at least a portion of the second liquid inlet hole; the second liquid outlet hole is located above the conveying area.

6. A recovery device for treatment liquid according to claim 5, characterized in that: A concave structure is provided in the middle of the discharge cavity along the axial direction of the discharge roller, and a discharge slope for guiding the liquid at both ends of the discharge cavity to the middle is provided on the concave structure.

7. A recovery device for treatment liquid according to claim 2 or 5, characterized in that: The recovery device also includes: Mounting table; A main frame, the main frame is located above the mounting platform; the first guide roller, the first liquid collecting roller and the liquid releasing roller are all rotatably connected to the main frame, and the extrusion member is connected to the main frame; along the axial direction of the first liquid collecting roller, one side of the main frame is rotatably connected to the mounting platform and has a rotation axis, and the rotation axis is perpendicular to the axial direction of the first liquid collecting roller and is horizontally arranged; A lifting assembly is installed on the mounting platform and is capable of lifting the main frame upward so that the main frame rotates around the rotation axis.

8. A recovery device for treatment liquid according to claim 1, characterized in that: The recovery device also includes: Base plate; A mounting platform, the mounting platform being located above the bottom plate, and a lifting driving member for lifting the mounting platform in a vertical direction is connected between the mounting platform and the bottom plate; A main frame is connected to the mounting platform; the first guide roller and the first liquid collecting roller are both rotatably connected to the main frame.

9. A recovery device for treatment liquid according to claim 1, characterized in that: A plane passing through the central axis of the first guide roller and the central axis of the first liquid collecting roller at the same time is defined as a preset plane, and the angle between the preset plane and any horizontal plane is in the range of 35° to 80°; during the movement of the liquid collecting conveyor belt, it first passes under the first liquid collecting roller, then passes over the first liquid collecting roller, and then passes through the second liquid collecting roller.

10. A digital printing pretreatment method, characterized in that: Including the following processes: Slurrying: 1-2 parts of sodium alginate, 6-9 parts of urea, 3-5 parts of sodium sulfate, 2-4 parts of sodium bicarbonate, and 10-13 parts of water are mixed and stirred evenly to obtain a treatment liquid; and the treatment liquid is poured into a soaking padder; Weft straightening: correcting the weft skew of the fabric on a weft straightening machine; Sizing, the fabric passes through the impregnation padder and is immersed in and absorbs the treatment liquid in the impregnation padder; The conveyor is provided with a recovery device as described in any one of claims 1 to 9, and the fabric passes through the conveyor area and is conveyed backward by the recovery device. During the conveying, the treatment liquid dripping on the fabric can be caught and adsorbed by the liquid collecting conveyor belt. When the liquid collecting conveyor belt moves to between the first liquid collecting roller and the first guide roller, the liquid collecting conveyor belt can be squeezed and release the treatment liquid, so that the treatment liquid falls into the liquid collecting tank; Drying: Drying the fabrics sent through the recovery device.

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