High-temperature high-pressure cloth dyeing machine

Abstract

The application relates to the technical field of cloth dyeing equipment, and particularly provides a high-temperature and high-pressure cloth dyeing machine which comprises a dyeing cabin, a dyeing liquid tank, cloth winding rollers, guide rollers and a heating assembly, the dyeing liquid tank is arranged in the dyeing cabin, the cloth winding rollers are two, the two cloth winding rollers are horizontally spaced and rotationally arranged in the dyeing cabin. The heating assembly is arranged, the heating intensity of the heating assembly on the central region of the cloth is smaller than that on the two end regions of the cloth, therefore, the heat absorbed by the two end regions of the cloth from the heating assembly is larger than that absorbed by the central region of the cloth from the heating assembly, under the action of the heating assembly, the situation that the temperature of the two end regions of the cloth is lower than that of the central region caused by the cold wall effect can be effectively improved, the temperature uniformity of the cloth in the width direction of the cloth is higher, and the problem that the color difference appears in the width direction of the cloth caused by the temperature difference can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of fabric dyeing equipment technology, and in particular to a high-temperature and high-pressure fabric dyeing machine. Background Technology

[0002] The dyeing machine is a key piece of equipment in the textile printing and dyeing industry, and is widely used in the dyeing and processing of various fabrics (especially high-end fabrics such as silk, nylon, and polyester).

[0003] The working process of the existing high temperature and high pressure dyeing machine is as follows: the fabric to be dyed is initially wound on a roll roller, and the fabric passes around the guide roller in sequence, and after passing through the dye in the dye bath, it is wound onto another roll roller.

[0004] During dyeing, two fabric rolls rotate synchronously. In this process, the fabric passes through the dye bath, allowing the dye to fully immerse and adhere to the fabric fibers. Then, the fabric undergoes dyeing and color-fixing reactions in the high-temperature, high-pressure environment created by saturated steam within the dyeing chamber. Finally, it is wound onto another fabric roll. After unidirectional winding is completed, the two fabric rolls rotate in opposite directions, rewinding the fabric back onto the original roll. This process is repeated until dyeing is complete.

[0005] However, the dyeing process described above has the following drawbacks: Although the high-temperature, high-pressure chamber is insulated by saturated steam, the ends of the fabric roll are close to the chamber's outer shell. Due to the temperature difference between the chamber's outer shell and the external environment, the edge areas of the chamber are more significantly affected by the "cold wall effect" and radiative heat dissipation, resulting in a much higher heat loss rate at the ends of the fabric roll compared to the central area. This causes the fabric wound on the roll to exhibit a temperature gradient of "lower temperature at the edges and higher temperature in the middle." Furthermore, because the dyeing reaction is highly sensitive to temperature changes (the dyeing rate of disperse dyes typically changes exponentially with temperature), the temperature difference directly leads to color differences between the edges and the center of the fabric along its width. Summary of the Invention

[0006] Therefore, it is necessary to provide a high-temperature and high-pressure fabric dyeing machine to address the problems existing in current fabric dyeing machines, in order to solve the problem of color difference between the edge and center of the fabric when dyeing fabric using existing fabric dyeing machines.

[0007] The above objectives are achieved through the following technical solutions: A high-temperature, high-pressure fabric dyeing machine includes: Dyeing chamber; Dye bath, located inside the dyeing chamber; There are two fabric rolling rollers, which are horizontally spaced apart and rotated inside the dyeing chamber; There are multiple guide rollers, which are arranged at intervals along a preset track inside the dyeing chamber and are rotatably mounted inside the dyeing chamber. There are two heating components, each corresponding to one of the multiple fabric rolling rollers. They are configured to heat the fabric along its width, with the heating intensity in the central area of ​​the fabric being less than that in the areas at both ends of the fabric.

[0008] Furthermore, the heating assembly includes a heating roller, a flexible tube, a hot fluid circulation unit, and an adjustment unit. The heating roller is located on a preset track inside the dyeing chamber, the flexible tube is coaxially sleeved inside the heating roller, the hot fluid circulation unit is used to heat the inside of the flexible tube, and the adjustment unit is used to adjust the diameter of the middle cross section of the flexible tube.

[0009] Furthermore, the adjustment unit includes swing arms, tension rollers, and elastic telescopic cylinders. There are two swing arms, which are spaced apart along the axis of the fabric roll roller, and the lower part of the swing arms is rotatably connected to the dyeing chamber. The two ends of the tension roller are rotatably connected to the two swing arms respectively. There are two elastic telescopic cylinders, which correspond one-to-one with the multiple swing arms. The cylinder body end of the elastic telescopic cylinder is hinged to the chamber wall inside the dyeing chamber and away from the guide roller, and the rod end is hinged to the upper part of the swing arm. The rod cavity of the elastic telescopic cylinder is connected to the interior of the heating roller.

[0010] Furthermore, the heating roller is positioned in the middle of the side of the swing arm away from the tensioning roller.

[0011] Furthermore, spiral groove groups are provided on the outer circumferential surface of the heating roller from the center to both ends along its axis. Each spiral groove group includes several spiral grooves arranged at equal intervals along the axis of the heating roller, and the spiral directions of the spiral grooves corresponding to the two spiral groove groups are opposite.

[0012] Furthermore, the high-temperature and high-pressure fabric dyeing machine also includes a steam heater, which is located at the bottom of the dye bath.

[0013] Furthermore, the high-temperature and high-pressure fabric dyeing machine also includes a pressure regulating component, which is used to adjust the pressure inside the dyeing chamber to a preset value.

[0014] Furthermore, the high-temperature and high-pressure fabric dyeing machine also includes a drive assembly for driving two fabric rolls to rotate circumferentially.

[0015] Furthermore, a door is hinged to one side of the dyeing chamber, and a hydraulic rod is installed between the door and the dyeing chamber to control the opening or closing of the door.

[0016] Furthermore, a sealing strip is installed at the edge of the hatch.

[0017] The beneficial effects of this invention are: 1. The present invention is equipped with a heating component. Since the heating intensity of the heating component on the central area of ​​the fabric is less than that on the two ends of the fabric, the heat absorbed by the two ends of the fabric from the heating component is greater than that absorbed by the central area. Therefore, under the action of the heating component, the situation where the temperature of the two ends of the fabric is lower than that of the central area caused by the "cold wall effect" can be effectively improved, making the temperature uniformity of the fabric along its width direction higher, thereby effectively improving the problem of edge-to-center color difference in the width direction of the fabric caused by temperature difference.

[0018] 2. This invention alters the contact area between the fabric and the heating roller during the fabric winding process by placing the heating roller in the middle of the swing arm. This results in the temperature of the fabric wound onto the roll roller first being higher than that of the fabric wound onto the roll roller later. This addresses the issue that the fabric wound onto the roll roller first absorbs more heat than the fabric wound onto the roll roller later, thereby improving the temperature uniformity of the fabric wound onto the roll roller and mitigating the problem of color difference between the beginning and end of the fabric.

[0019] 3. This invention features two sets of spiral grooves with opposite rotation directions along the axis of the heating roller on its outer circumference. When the fabric slope changes, excess dye liquor is guided from the center to both ends along the fabric width. When the fabric slope between the guide roller and the heating roller is gentle, less dye liquor flows back into the dye bath from the fabric, resulting in a larger contact area between the fabric and the heating roller. In this case, the spiral grooves on the heating roller surface push more dye liquor to both ends. Conversely, when the slope is steep, more dye liquor flows back into the dye bath from the fabric, resulting in a smaller contact area between the fabric and the heating roller. In this case, the spiral grooves on the heating roller surface push less dye liquor to both ends, ensuring that the amount of dye liquor absorbed by the fabric surfaces of the successively wound fabrics is essentially the same, further improving color difference between the beginning and end of the roll. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the open state of a high-temperature and high-pressure fabric dyeing machine according to the present invention. Figure 2 This is a schematic diagram of the closed state of a high-temperature and high-pressure fabric dyeing machine according to the present invention; Figure 3 for Figure 2 Side view; Figure 4 for Figure 2 The front view; Figure 5 for Figure 4 Sectional view of AA; Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C; Figure 7This is a schematic diagram of the working state of a high-temperature and high-pressure fabric dyeing machine according to the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point D; Figure 9 for Figure 4 BB section view; Figure 10 This is a schematic diagram of the heating component in a high-temperature and high-pressure fabric dyeing machine according to the present invention; Figure 11 for Figure 10 Side view; Figure 12 for Figure 11 EE section view.

[0021] in: 100. Dyeing chamber; 110. Chamber door; 120. Hydraulic rod; 200. Dye bath; 300. Fabric rolling roller; 400. Guide roller; 500. Heating components; 510 Heating roller; 511 Spiral chute; 520 Flexible tube; 530 Adjusting unit; 540 Fixed support rod; 550 Radial connecting rod; 531. Swing arm; 532. Tensioning roller; 533. Elastic telescopic cylinder; 600. Steam heater; 700. Driver components; 800. Fabric. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The following reference Figures 1-12 This invention describes a high-temperature, high-pressure fabric dyeing machine.

[0026] A high-temperature and high-pressure fabric dyeing machine includes a dyeing chamber 100, a dye bath 200, a fabric rolling roller 300, a guide roller 400, and a heating assembly 500. The dye bath 200 is located inside the dyeing chamber 100. There are two fabric rolling rollers 300, which are horizontally spaced and rotatably arranged inside the dyeing chamber 100. There are multiple guide rollers 400, which are spaced along a preset trajectory inside the dyeing chamber 100 and rotatably arranged inside the dyeing chamber 100. There are two heating assemblies 500, which correspond one-to-one with the two fabric rolling rollers 300. They are configured to heat the fabric 800 along the width direction of the fabric 800, and the heating intensity of the central area of ​​the fabric 800 is less than the heating intensity of the two ends of the fabric 800.

[0027] In use, first, the fabric 800 is initially wound onto a roll roller 300, then the fabric 800 is sequentially wound around each guide roller 400, and after passing through the dye bath 200, it is wound onto another roll roller 300 (to...). Figure 5As shown, the left-hand roll roller 300 is the roll roller 300 for the initial winding of the fabric 800, and the right-hand roll roller 300 is another roll roller 300 for winding up the fabric 800. Next, the prepared dye solution is added into the dye solution tank 200. Then, the dyeing chamber 100 is sealed, and the temperature and pressure inside the dyeing chamber 100 are increased to raise the temperature inside the dyeing chamber 100 to the preset dyeing temperature and the pressure to the preset dyeing pressure.

[0028] Next, the left roll roller 300 rotates clockwise, and the right roll roller 300 rotates clockwise in the same direction. At this time, the fabric 800 wound on the left roll roller 300 passes through the dye bath 200 and is wound onto the right roll roller 300. During this process, because the dyeing chamber 100 is a high-temperature and high-pressure environment, the dye bath can complete the dyeing and color fixing of the fabric 800. While the two roll rollers 300 rotate at the same speed, the heating component 500 is activated to heat the fabric 800 along its width. Because the heating intensity of the heating component 500 on the central area of ​​the fabric 800 is less than that on the two ends of the fabric 800, the heat absorbed by the two ends of the fabric 800 from the heating component 500 is greater than that absorbed by the central area. Therefore, under the action of the heating component 500, the situation where the temperature of the two ends of the fabric 800 is lower than that of the central area caused by the "cold wall effect" can be effectively improved, making the temperature uniformity of the fabric 800 along its width direction higher, thereby effectively improving the problem of edge-to-center color difference in the width direction of the fabric 800 caused by temperature difference.

[0029] After the fabric 800 has completed unidirectional winding, the two winding rollers 300 are rotated in opposite directions to wind the fabric 800 back onto the original winding roller 300. This process is repeated a preset number of times. Then, the fabric 800 is wound back onto the original winding roller 300 again. The dyeing chamber 100 is then restored to normal temperature and pressure. Finally, the dyeing chamber 100 is opened, the fabric 800 on the original winding roller 300 is removed, and a new fabric 800 is replaced. The above process is repeated to dye the next piece of fabric 800.

[0030] In a further embodiment, such as Figure 5 , Figure 6 As shown, the heating assembly 500 includes a heating roller 510, a flexible tube 520, a hot fluid circulation unit, and an adjustment unit 530. The heating roller 510 is located on a preset track inside the dyeing chamber 100. The flexible tube 520 is coaxially sleeved inside the heating roller 510. The hot fluid circulation unit is used to heat the inside of the flexible tube. The adjustment unit 530 is used to adjust the cross-sectional diameter of the central region of the flexible tube 520.

[0031] Since the heating roller 510 is located on a preset track inside the dyeing chamber 100, the heating roller 510 is in direct contact with the fabric 800. Under the action of heat transfer, the heat of the heating roller 510 can be directly absorbed by the fabric 800.

[0032] During heating, the hot fluid circulates within the flexible tube 520 via a hot fluid circulation unit. Simultaneously, the adjusting unit 530 ensures that the cross-sectional diameter of the central region of the flexible tube 520 is smaller than that of its two ends. Under heat transfer, the heat from the hot fluid is absorbed by the flexible tube 520. Because the cross-sectional diameter of the central region of the flexible tube 520 is smaller than that of its two ends, the heat absorbed by the flexible tube 520 is primarily exchanged with the heating roller 510 through heat radiation in the central region, while it is primarily exchanged through heat transfer at the two ends. Since the heating efficiency of heat transfer is higher than that of heat radiation, the temperature at the two ends of the heating roller 510 is higher than that at the central region. Since the heating roller 510 is in direct contact with the fabric 800, the heat transferred to the fabric 800 from both ends of the heating roller 510 is greater than that transferred to the fabric 800 from the center. Therefore, it can effectively improve the situation where the temperature of the fabric 800 from both ends is lower than that of the center due to the "cold wall effect". This makes the temperature uniformity of the fabric 800 along its width direction higher, thereby effectively improving the problem of edge-to-center color difference in the width direction of the fabric 800 caused by temperature differences.

[0033] Furthermore, the heat fluid is preferably steam, and the heat fluid circulation unit includes a gas distribution cylinder, a pressure reducing valve, a steam trap assembly, a condensate pump, and a condensate recovery tank.

[0034] In use, the saturated steam generated by the boiler or thermal power plant is distributed by the steam distribution cylinder and then adjusted to a pressure of 0.5-0.6 MPa by the pressure reducing valve. It is then sent into the interior of the flexible tube 520 from one end. After the steam releases heat through the flexible tube 520, it forms condensate and is discharged from the other end of the flexible tube 520 through the steam trap assembly. The condensate is then sent back to the condensate recovery tank by the condensate pump.

[0035] Furthermore, the flexible tube 520 can be made of any one of fluororubber, silicone rubber or EPDM rubber, and preferably EPDM rubber.

[0036] In a further embodiment, such as Figure 6 and Figure 8As shown, the adjustment unit 530 includes a swing arm 531, a tension roller 532, and an elastic telescopic cylinder 533. There are two swing arms 531, which are spaced apart along the axis of the fabric roll roller 300. The lower part of the swing arm 531 is rotatably connected to the dyeing chamber 100. The two ends of the tension roller 532 are rotatably connected to the two swing arms 531 respectively. There are two elastic telescopic cylinders 533, which correspond one-to-one with the multiple swing arms 531. The cylinder body end of the elastic telescopic cylinder 533 is hinged to the chamber wall of the dyeing chamber 100 and away from the guide roller 400. The rod end is hinged to the upper part of the swing arm 531. The rod cavity of the elastic telescopic cylinder 533 is connected to the interior of the heating roller 510, that is, connected to the interlayer between the heating roller 510 and the flexible tube 520.

[0037] Taking the left-hand roll 300 as the initial roll for winding the fabric 800 as an example, as the radial thickness of the fabric 800 on the right-hand roll 300 increases, the component of the tension of the fabric 800 between the right-hand roll 300 and the tension roller 532 gradually increases in the direction perpendicular to the lever arm of the swing arm 531. The torque on the right-hand swing arm 531 gradually increases, so the right-hand swing arm 531 rotates counterclockwise around its rotation axis. The elastic force of the elastic telescopic cylinder 533 connected to it gradually increases, the rod end of the elastic telescopic cylinder 533 extends outward, and the volume of the rod cavity gradually decreases. Since the rod cavity is connected to the interior of the right-hand heating roller 510, as the volume of the rod cavity decreases, the amount of gas in the rod cavity entering the interlayer between the right-hand heating roller 510 and the flexible tube 520 gradually increases, and the air pressure inside the interlayer between the right-hand heating roller 510 and the flexible tube 520 gradually increases. Since the two ends of the flexible tube 520 are fixed to the heating roller 510, under the action of air pressure, the reduction in the cross-sectional diameter of the two end regions of the flexible tube 520 due to compression is less than the reduction in the cross-sectional diameter of the central region of the flexible tube 520. That is, as the radial thickness of the fabric 800 on the right-side fabric rolling roller 300 increases, the difference between the cross-sectional diameter of the central region and the cross-sectional diameter of the two end regions of the right-side flexible tube 520 gradually increases, and the corresponding difference in heating intensity between the central region and the two end regions of the heating roller 510 gradually increases.

[0038] Similarly, as the radial thickness of the fabric 800 on the left-side winding roller 300 decreases, the component of the tension of the fabric 800 between the left-side winding roller 300 and the tension roller 532 in the direction perpendicular to the lever arm of the swing arm 531 gradually decreases. The torque on the left-side swing arm 531 gradually increases, causing the left-side swing arm 531 to rotate clockwise around its axis of rotation. The elastic force of the elastic telescopic cylinder 533 connected to it gradually decreases, and the elastic element inside the elastic telescopic cylinder 533 pulls the rod end of the elastic telescopic cylinder 533 inwards. Thus, the volume of the rod cavity gradually increases. The rod cavity is connected to the interior of the left heating roller 510. Therefore, as the volume of the rod cavity increases, the air in the interlayer between the left heating roller 510 and the flexible tube 520 gradually flows back into the rod cavity, causing the air pressure inside the interlayer between the left heating roller 510 and the flexible tube 520 to gradually decrease. As the radial thickness of the fabric 800 on the left fabric roll roller 300 decreases, the difference between the cross-sectional diameter of the central region and the cross-sectional diameter of the two end regions of the left flexible tube 520 gradually decreases, and the corresponding difference in heating intensity between the central region and the two end regions of the heating roller 510 gradually decreases.

[0039] It should be noted that in the above process, as the radial thickness of the fabric 800 wound on the fabric roll 300 increases, the difference in heating intensity between the two ends and the center of the corresponding heating roll 510 gradually increases; conversely, as the radial thickness of the fabric 800 wound on the fabric roll 300 decreases, the difference in heating intensity between the two ends and the center of the corresponding heating roll 510 gradually decreases. This is to adapt to the situation where the fabric 800 wound onto the fabric roll 300 first has a long cooling time and high temperature uniformity along its width, while the fabric 800 wound onto the fabric roll 300 later has a short cooling time and low temperature uniformity along its width. This is to ensure the temperature uniformity of the entire roll of fabric 800 along its width.

[0040] When the fabric 800 is wound in reverse from the right-side winding roller 300 to the left-side winding roller 300, the working process of the adjustment unit 530 is the same as the above-described process, and will not be described in detail here.

[0041] It should be noted that when the fabric 800 is not wound on the fabric rolling roller 300, the air pressure in the rod cavity, cylinder cavity and the interlayer between the heating roller 510 and the flexible tube 520 of the elastic telescopic cylinder 533 should be basically consistent with the pressure of the hot fluid circulating in the flexible tube 520, that is, the initial air pressure should be maintained at 0.5-0.6MPa.

[0042] It is understandable that, due to the large heat capacity of the fabric roll 300, during the fabric 800 winding process, the amount of heat absorbed by the fabric 800 closer to the roll 300 is greater than the amount of heat absorbed by the fabric 800 farther from the roll 300. This results in the temperature of the fabric 800 wound on the roll 300 increasing radially from the inside to the outside, causing color differences between the beginning and end of the fabric 800. To solve this problem, in a further embodiment, such as... Figure 6 and Figure 8 As shown, the heating roller 510 is located in the middle of the side of the swing arm 531 away from the tension roller 532.

[0043] Taking the fabric rolling roller 300 on the right as an example, Figure 6 As shown, the contact angle between the fabric 800 and the heating roller 510 is 60.1° at this time. When the swing arm 531 swings counterclockwise to... Figure 8 In the indicated state, the contact angle between the fabric 800 and the heating roller 510 is 54.5°. That is, as the radial thickness of the fabric 800 wound on the right-side roll roller 300 increases, the contact area between the heating roller 510 fixed on the right-side swing arm 531 and the fabric 800 gradually decreases. Therefore, under the heating action of the heating roller 510, the temperature of the fabric 800 wound onto the roll roller 300 first is greater than the temperature of the fabric 800 wound onto the roll roller 300 later. This is to adapt to the problem that the fabric 800 wound onto the roll roller 300 first absorbs more heat than the fabric 800 wound onto the roll roller 300 later, thereby improving the temperature uniformity of the fabric 800 wound onto the roll roller 300 and improving the problem of color difference between the beginning and end of the fabric 800.

[0044] Specifically, in order to position the heating roller 510 at the center of the side of the swing arm 531 away from the tension roller 532, and to prevent the swing arm 531 from interfering with the winding of the fabric 800, such as... Figure 10 As shown, a fixed support rod 540 is provided in the middle of the swing arm 531, and multiple radial connecting rods 550 are provided at intervals along its axis on the outside of the fixed support rod 540. The heating roller 510 is fixedly connected to the end of the radial connecting rod 550 away from the fixed support rod 540.

[0045] Understandably, in Figure 5 In the indicated state, the angle between the fabric 800 located between the guide roller 400 and the heating roller 510 and the center line of the dyeing chamber 100 in the left-right direction is 12.87°. As the radial thickness of the fabric 800 on the right-side winding roller 300 increases, the swing arm 531 swings counterclockwise. When the swing arm 531 swings to... Figure 7In the indicated state, the angle between the fabric 800 located between the guide roller 400 and the heating roller 510 and the centerline of the dyeing chamber 100 in the left-right direction is 9.4°. That is, as the radial thickness of the fabric 800 wound onto the roll-up roller 300 increases, the slope of the fabric 800 located between the guide roller 400 and the heating roller 510 gradually becomes steeper. This causes the resistance to the dye liquor immersed in the fabric 800 flowing downwards along the slope of the fabric 800 to gradually decrease. Consequently, the amount of dye liquor absorbed by the fabric 800 wound onto the roll-up roller 300 first and the fabric 800 wound onto the roll-up roller 300 later differs, resulting in a certain degree of color difference between the beginning and end of the fabric 800. To solve this problem, in a further embodiment, such as... Figure 10 As shown, spiral groove groups are provided on the outer circumferential surface of the heating roller 510 from the center to both ends along its axis. Each spiral groove group includes several spiral grooves 511 arranged at equal intervals along the axis of the heating roller 510, and the spiral directions of the spiral grooves 511 corresponding to the two spiral groove groups are opposite.

[0046] Because the surface of the heating roller 510 has two sets of spiral grooves, and the spiral grooves 511 in the two sets of spiral grooves rotate in opposite directions, the excess dye liquor can move from the center to both ends along the width direction of the fabric 800 under the guiding action of the spiral grooves 511. When the slope of the fabric 800 between the guide roller 400 and the heating roller 510 is relatively gentle, the amount of dye liquor adsorbed on the surface of the fabric 800 between the guide roller 400 and the heating roller 510 is relatively large. At this time, the spiral grooves 511 push more dye liquor from the center of the heating roller 510 to both ends. When the slope of the fabric 800 between the guide roller 400 and the heating roller 510 is relatively steep, the amount of dye liquor adsorbed on the surface of the fabric 800 between the guide roller 400 and the heating roller 510 is relatively small. The spiral grooves 511 push less dye liquor from the center to both ends. Therefore, under the guiding effect of the spiral chute 511, the amount of dye liquor adsorbed on the surface of the fabric 800 that is first wound onto the fabric roll 300 and the fabric 800 that is wound onto the fabric roll 300 later will be basically the same, thereby achieving the purpose of improving the color difference between the beginning and end of the fabric 800.

[0047] In a further embodiment, such as Figure 5 As shown, the high-temperature and high-pressure fabric dyeing machine also includes a steam heater 600, which is located at the bottom of the dye bath 200.

[0048] A steam heater 600 is provided to heat the dye solution in the dye bath 200 and to raise the temperature inside the dyeing chamber 100, so that the temperature inside the dyeing chamber 100 is maintained at a preset dyeing temperature, and to pressurize the inside of the dyeing chamber 100 by steam.

[0049] In a further embodiment, the high-temperature and high-pressure fabric dyeing machine also includes a pressure regulating component for adjusting the pressure inside the dyeing chamber 100 to a preset value.

[0050] A pressure regulating component is provided to adjust the pressure inside the dyeing chamber 100 to the preset dyeing pressure.

[0051] Specifically, the pressure regulating component is a pressure relief valve installed on the dyeing chamber 100, which is used to release a certain amount of pressure when the pressure inside the dyeing chamber 100 increases to exceed the preset dyeing pressure, so as to maintain the pressure stability inside the dyeing chamber 100.

[0052] In a further embodiment, such as Figure 1 and Figure 2 As shown, the high-temperature and high-pressure fabric dyeing machine also includes a drive assembly 700, which is used to drive the two fabric rolls 300 to rotate circumferentially.

[0053] The drive assembly 700 includes a motor and a reducer. The motor is located outside the dyeing chamber 100. The input shaft of the reducer is fixedly connected to the output shaft of the motor. The output shaft of the reducer is coaxially fixedly connected to the fabric roll 300 to drive the fabric roll 300 to rotate circumferentially.

[0054] In a further embodiment, such as Figure 1 and Figure 2 As shown, a door 110 is hinged to one side of the dyeing chamber 100, and a hydraulic rod 120 is provided between the door 110 and the dyeing chamber 100 to control the opening or closing of the door 110.

[0055] When it is necessary to put in or take out the fabric 800, the door 110 is opened by controlling the hydraulic rod 120, and then the fabric 800 is put in or taken out onto the fabric roll roller 300. After the fabric 800 is put in or taken out, the door 110 is closed by controlling the hydraulic rod 120.

[0056] In a further embodiment, a sealing strip is provided at the edge of the hatch 110.

[0057] A sealing strip is provided to ensure the airtightness of the dyeing chamber 100 when the hatch 110 is closed.

[0058] The specific working process of a high-temperature and high-pressure fabric dyeing machine provided by the present invention will be described in conjunction with the above embodiments: During the fabric loading and threading stage, the fabric 800 is initially wound onto the left-side winding roller 300. Then, the fabric 800 passes sequentially around each guide roller 400 and heating roller 510, passes through the dye bath 200, and is wound onto the right-side winding roller 300. Subsequently, the prepared dye solution is added into the dye bath 200, the door 110 is closed, and it is pressed tightly by the hydraulic rod 120. The sealing strip on the edge of the door 110 creates a sealed environment inside the dyeing chamber 100.

[0059] During the heating and pressurization stage, the steam heater 600 installed at the bottom of the dye bath 200 is activated to heat the dye bath and the interior of the dyeing chamber 100. At the same time, the pressure inside the dyeing chamber 100 is adjusted and maintained by the pressure regulating component, so that the temperature inside the dyeing chamber 100 rises to the preset dyeing temperature and the pressure rises to the preset dyeing pressure.

[0060] Preheating stage: Start the hot fluid circulation unit to preheat the air in the interlayer between the flexible tube 520 and the heating roller 510, as well as the air inside the elastic telescopic cylinder 533, so that the air temperature is basically the same as the hot fluid temperature, so as to avoid the elastic telescopic cylinder 533 not moving according to the prescribed trajectory due to air expansion during the dyeing process.

[0061] During the dyeing stage, the left roll roller 300 is driven to rotate clockwise, and the right roll roller 300 rotates clockwise in the same direction. The fabric 800 on the left roll roller 300 passes through the dye bath 200 and is then wound onto the right roll roller 300, where dyeing and color fixing are completed under high temperature and high pressure. Simultaneously, the heating component 500 is activated, and the hot fluid circulates within the flexible tube 520. Because the cross-sectional diameter of the central region of the flexible tube 520 is smaller than that of the two end regions, heat exchange between the central region and the heating roller 510 is mainly through radiation, while heat exchange between the two end regions is mainly through transfer. This results in a higher temperature at the two end regions of the heating roller 510 compared to the central region, causing the fabric 800 to absorb more heat at the two end regions than at the central region. This compensates for the edge-to-center temperature difference caused by the cold wall effect and improves the edge-to-center color difference.

[0062] As the radial thickness of the fabric 800 wound on the right-side winding roller 300 increases, the component of the tension of the fabric 800 located between the right-side winding roller 300 and the tension roller 532 in the direction perpendicular to the lever arm of the swing arm 531 gradually increases. This causes the corresponding swing arm 531 to swing counterclockwise around its rotation axis, compressing the corresponding elastic telescopic cylinder 533. The gas in the rod chamber of the elastic telescopic cylinder 533 is forced into the interlayer between the right-side heating roller 510 and the flexible tube 520, increasing the air pressure within the interlayer. Since the two ends of the flexible tube 520 are fixed to the heating roller 510, under the action of air pressure, the reduction in the cross-sectional diameter of the central region of the flexible tube 520 is greater than that of the two end regions. This causes the difference in cross-sectional diameter between the central region and the two end regions of the flexible tube 520 to gradually increase, corresponding to a gradual increase in the difference in heating intensity between the two end regions and the center of the heating roller 510. Conversely, as the radial thickness of the fabric 800 on the left-side winding roller 300 decreases, the air pressure within the corresponding interlayer decreases, and the aforementioned difference gradually decreases. This adaptive adjustment mechanism adapts to situations where the cooling time of the first-wound fabric 800 is long and the cooling time of the second-wound fabric 800 is short, ensuring the temperature uniformity of the entire fabric 800 along the width direction.

[0063] Meanwhile, as the radial thickness of the fabric 800 wound on the right-side roll 300 increases, the swing arm 531 drives the heating roller 510, which is located in the middle of the side away from the tension roller 532, to swing. This causes the contact angle between the fabric 800 and the heating roller 510 to gradually decrease from about 60.1° to about 54.5°, and the contact area to gradually decrease. As a result, the fabric 800 wound onto the right-side roll 300 first receives more heat than the fabric 800 wound later, thereby compensating for the radial temperature difference of the wound fabric 800 caused by the heat capacity of the roll 300 and improving the color difference between the beginning and end.

[0064] In addition, two sets of spiral grooves 511 with opposite rotation directions are provided on the outer circumference of the heating roller 510 along its axis from the center to both ends. When the slope of the fabric 800 changes, excess dye liquor is guided from the center to both ends along the width direction of the fabric 800. When the slope of the fabric 800 between the guide roller 400 and the heating roller 510 is gentle, more dye liquor is pushed to both ends; when the slope is steep, less dye liquor is pushed to both ends. This ensures that the amount of dye liquor adsorbed on the surface of the fabric 800 after each winding is basically the same, further improving the color difference between the beginning and end.

[0065] After unidirectional winding is completed, the two fabric rolls 300 are driven to rotate in opposite directions, rewinding the fabric 800 back onto the left fabric roll 300. During the reverse process, the adjustment unit 530 adaptively adjusts according to logic symmetrical to that of forward dyeing. Forward dyeing and reverse winding are repeated a preset number of times, causing the fabric 800 to be immersed and heated multiple times under high temperature and high pressure. After completing the preset cycle, the fabric 800 is finally rewinded back onto the left fabric roll 300, allowing the dyeing chamber 100 to return to normal temperature and pressure. The chamber door 110 is then opened to remove the fabric 800 and replace it with a new fabric 800. The entire process is repeated for the next roll of fabric 800.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A high-temperature, high-pressure fabric dyeing machine, characterized in that, include: Dyeing chamber; Dye bath, located inside the dyeing chamber; There are two fabric rolling rollers, which are horizontally spaced apart and rotated inside the dyeing chamber; There are multiple guide rollers, which are arranged at intervals along a preset track inside the dyeing chamber and rotate within the dyeing chamber. There are two heating components, each corresponding to one of the multiple fabric rolling rollers. They are configured to heat the fabric along its width, with the heating intensity in the central area of ​​the fabric being less than that in the areas at both ends of the fabric.

2. The high-temperature and high-pressure fabric dyeing machine according to claim 1, characterized in that, The heating assembly includes a heating roller, a flexible tube, a hot fluid circulation unit, and an adjustment unit. The heating roller is located on a preset track inside the dyeing chamber. The flexible tube is coaxially sleeved inside the heating roller. The hot fluid circulation unit is used to heat the inside of the flexible tube. The adjustment unit is used to adjust the diameter of the middle cross section of the flexible tube.

3. The high-temperature and high-pressure fabric dyeing machine according to claim 2, characterized in that, The adjustment unit includes swing arms, tension rollers, and elastic telescopic cylinders. There are two swing arms, which are spaced apart along the axis of the fabric roll roller. The lower part of the swing arms is rotatably connected to the dyeing chamber. The two ends of the tension roller are rotatably connected to the two swing arms respectively. There are two elastic telescopic cylinders, which correspond one-to-one with the multiple swing arms. The cylinder body end of the elastic telescopic cylinder is hinged to the chamber wall inside the dyeing chamber and away from the guide roller. The rod end is hinged to the upper part of the swing arm. The rod cavity of the elastic telescopic cylinder is connected to the interior of the heating roller.

4. The high-temperature and high-pressure fabric dyeing machine according to claim 3, characterized in that, The heating roller is positioned in the middle of the side of the swing arm away from the tensioning roller.

5. A high-temperature and high-pressure fabric dyeing machine according to claim 4, characterized in that, The outer circumference of the heating roller is provided with spiral groove groups from the center to both ends along its axis. Each spiral groove group includes several spiral grooves arranged at equal intervals along the axis of the heating roller, and the spiral directions of the spiral grooves corresponding to the two spiral groove groups are opposite.

6. A high-temperature and high-pressure fabric dyeing machine according to any one of claims 1-5, characterized in that, The high-temperature and high-pressure fabric dyeing machine also includes a steam heater, which is located at the bottom of the dye bath.

7. A high-temperature and high-pressure fabric dyeing machine according to claim 6, characterized in that, The high-temperature and high-pressure fabric dyeing machine also includes a pressure regulating component, which is used to adjust the pressure inside the dyeing chamber to a preset value.

8. A high-temperature and high-pressure fabric dyeing machine according to claim 7, characterized in that, The high-temperature and high-pressure fabric dyeing machine also includes a drive assembly for driving two fabric rolls to rotate circumferentially.

9. A high-temperature and high-pressure fabric dyeing machine according to claim 8, characterized in that, A door is hinged to one side of the dyeing chamber, and a hydraulic rod is installed between the door and the dyeing chamber to control the opening or closing of the door.

10. A high-temperature and high-pressure fabric dyeing machine according to claim 9, characterized in that, A sealing strip is installed at the edge of the hatch.

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