Waterless dyeing system and control method thereof

Abstract

The invention provides a waterless dyeing system and a control method thereof, and relates to the technical field of textile dyeing, the waterless dyeing system comprises a dyeing kettle, a sarong and a dye bin, the sarong and the dye bin are both arranged in a cavity of the dyeing kettle, the dyeing kettle is provided with a first connecting pipe, the sarong is connected to the first connecting pipe, the dyeing kettle is further provided with a second connecting pipe and a third connecting pipe, the second connecting pipe is connected into a cavity of the dyeing kettle, the dye bin is connected to the third connecting pipe, the first connecting pipe is sequentially connected to the circulating pump and the third connecting pipe outside the dyeing kettle, and the second connecting pipe is sequentially connected to the first control valve, the circulating pump and the third connecting pipe outside the dyeing kettle. The control method comprises the steps that in the dye dissolving stage, the first control valve and the circulating pump are started, and the second connecting pipe, the first control valve, the circulating pump and the third connecting pipe are sequentially connected to form a bypass loop; in the dyeing stage, the first connecting pipe, the circulating pump and the third connecting pipe form a main loop. A dye kettle in the prior art is omitted, and the dye bin is easier to clean and replace.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing, in particular to a waterless dyeing system and a control method thereof. Background Art

[0002] The waterless dyeing system is an innovative textile dyeing technology that aims to reduce the large amount of water consumption and environmental pollution in the traditional dyeing process. This technology can complete the dyeing process without water by using supercritical carbon dioxide dyeing solvent. Among them, the dye kettle, as a key equipment, is responsible for storing and transporting dyes. However, the cleaning and replacement of the dye kettle is complicated and time-consuming, which restricts the production efficiency of the waterless dyeing system. Summary of the invention

[0003] The purpose of the present invention is to provide a waterless dyeing system to solve the technical problem that the operations of cleaning a dye kettle and replacing dyes in the waterless dyeing system are relatively complicated and time-consuming.

[0004] In a first aspect, the present invention provides a waterless dyeing system, comprising a dyeing kettle, a gauze cage and a dye bin, wherein the gauze cage and the dye bin are both arranged in a cavity of the dyeing kettle, the dyeing kettle is provided with a first connecting pipe, the gauze cage is connected to the first connecting pipe, the dyeing kettle is further provided with a second connecting pipe and a third connecting pipe, the second connecting pipe is connected to the cavity of the dyeing kettle, the dye bin is connected to the third connecting pipe, the first connecting pipe is connected to a circulation pump and a third connecting pipe in sequence outside the dyeing kettle, and the second connecting pipe is connected to a first control valve, a circulation pump and a third connecting pipe in sequence outside the dyeing kettle.

[0005] In an optional embodiment, the first control valve further includes a flow regulation function.

[0006] In an optional embodiment, it also includes a first three-way valve and a second three-way valve, the first port of the first three-way valve is connected to the first connecting pipe of the dyeing kettle, the second port of the first three-way valve is connected to the circulation pump and the third connecting pipe in sequence, the third port of the first three-way valve is connected to the third connecting pipe, the first port of the second three-way valve is connected to the first connecting pipe or the second connecting pipe, the second port of the second three-way valve is connected to the circulation pump and the third connecting pipe in sequence, and the third port of the second three-way valve is connected to the third connecting pipe.

[0007] In an optional embodiment, it also includes a first three-way joint, a second three-way joint and a third three-way joint, the first three-way joint is respectively connected to the first connecting pipe, the first port of the first three-way valve and the second three-way joint, the second three-way joint is respectively connected to the second connecting pipe, the first three-way joint and the first port of the second three-way valve, and the third three-way joint is respectively connected to the third connecting pipe, the third port of the first three-way valve and the third port of the second three-way valve.

[0008] In an optional embodiment, the inlet pipe of the dye tank is connected to the third connecting pipe via a flexible joint.

[0009] The waterless dyeing system provided by the present invention has the following beneficial effects:

[0010] 1. The dye kettle in the prior art is eliminated, and the dye bin is arranged in the cavity of the dye kettle. In the waterless dyeing system, a yarn cage is installed in the dye kettle, and the dye kettle itself is designed to be easy to open and clean. Therefore, the present invention can make the dye bin in the waterless dyeing system easier to clean and replace.

[0011] 2. The second connecting pipe is connected to the first control valve, the circulation pump and the third connecting pipe in sequence outside the dyeing kettle to form a bypass loop. The bypass loop does not pass through the yarn cage and can be used to dissolve the dye. After closing the first control valve, the bypass loop is disconnected without affecting the dyeing operation of the main loop.

[0012] 3. The dye kettle in the prior art is eliminated, which saves the design, manufacture and welding of the dye kettle, and eliminates the corresponding pipes, valves and other components. It only needs to lengthen the cylinder of the dye kettle appropriately, which only increases a small amount of material cost. Overall, the system pipeline structure is simpler and the overall cost is lower.

[0013] In a second aspect, the present invention provides a control method for a waterless dyeing system according to the aforementioned embodiment, in which, during the dye dissolution stage, a first control valve and a circulation pump are opened, and a second connecting pipe, a first control valve, a circulation pump and a third connecting pipe are sequentially connected to form a bypass loop;

[0014] During the dyeing stage, the first connecting pipe, the circulation pump and the third connecting pipe form a main loop.

[0015] In an optional embodiment, during the dyeing stage, the flow rate of the first control valve is opened and adjusted, and the bypass circuit has a flow diversion effect on the main circuit.

[0016] In an optional embodiment, the waterless dyeing system further comprises a first three-way valve and a second three-way valve, wherein the first port of the first three-way valve is connected to the first connecting pipe of the dyeing kettle, the second port of the first three-way valve is connected to the circulation pump and the third connecting pipe in sequence, the third port of the first three-way valve is connected to the third connecting pipe, the first port of the second three-way valve is connected to the first connecting pipe or the second connecting pipe, the second port of the second three-way valve is connected to the circulation pump and the third connecting pipe in sequence, and the third port of the second three-way valve is connected to the third connecting pipe;

[0017] During the dye dissolution stage, open the first control valve and the circulation pump, open the second port and the third port of the first three-way valve, open the first port and the second port of the second three-way valve, and connect the second connecting pipe, the first control valve, the second three-way valve, the circulation pump, the first three-way valve and the third connecting pipe in sequence to form a bypass loop.

[0018] In an optional embodiment, during the dyeing stage, the main loop includes two stages: a forward circulation and a reverse circulation;

[0019] In the positive circulation stage of the main loop, the third port of the first three-way valve is closed, the first port of the second three-way valve is closed, and the third connecting pipe, the second three-way valve, the circulation pump, the first three-way valve and the first connecting pipe are connected in sequence;

[0020] In the reverse circulation stage of the main loop, the first port of the first three-way valve is closed, the third port of the second three-way valve is closed, and the first connecting pipe, the second three-way valve, the circulation pump, the first three-way valve and the third connecting pipe are connected in sequence.

[0021] In an optional implementation, during the forward circulation stage and the reverse circulation stage of the main loop, the flow of the first control valve is opened and adjusted, and the bypass loop has a diversion effect on the main loop.

[0022] The control method of the waterless dyeing system provided by the present invention utilizes a bypass circuit to dissolve dye, utilizes a main circuit to perform dyeing operations, and utilizes a first control valve to switch the bypass circuit and the main circuit, thereby fully utilizing the structural design characteristics of the waterless dyeing system and being simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a waterless dyeing system in the prior art;

[0025] Figure 2 A schematic diagram of the structure of the waterless dyeing system provided in Example 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the waterless dyeing system provided in the second embodiment of the present invention;

[0027] Figure 4 The second structural schematic diagram of the waterless dyeing system provided in the second embodiment of the present invention;

[0028] Figure 5 This is the third structural schematic diagram of the waterless dyeing system provided in the second embodiment of the present invention.

[0029] Icons: 100-dyeing kettle; 110-first connecting pipe; 120-second connecting pipe; 130-third connecting pipe; 200-sarong; 300-dye bin; 310-flexible joint; 400-circulating pump; 500-first control valve; 610-first three-way valve; 620-second three-way valve; 710-first three-way joint; 720-second three-way joint; 730-third three-way joint; 800-heat exchanger; 900-dye kettle. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] Figure 1 It is a structural schematic diagram of the waterless dyeing system in the prior art, such as Figure 1 As shown, a yarn cage 200 is provided in the dyeing kettle 100, and the waterless dyeing system further includes a circulation pump 400 and a dye kettle 900, and the dye kettle 900 is connected to the dyeing kettle 100 and the circulation pump 400 through a pipeline and a valve. The independent dye kettle 900 not only needs to be designed and manufactured separately, but also needs corresponding pipelines and valves and other components to be connected. The overall cost of the waterless dyeing system is high, and the replacement and cleaning of the dye kettle 900 are inconvenient, which restricts the production efficiency of the entire waterless dyeing system.

[0038] like Figure 1 As shown, the waterless dyeing system may further include a heat exchanger 800, and the heat exchanger 800 is used to control the temperature in the waterless dyeing system. The present invention is not limited to this. In the following embodiments, the present invention is described by taking the heat exchanger 800 as an example.

[0039] Embodiment 1

[0040] Figure 2 The schematic diagram of the structure of the waterless dyeing system provided in the first embodiment of the present invention is as follows: Figure 2 As shown, Embodiment 1 of the present invention provides a waterless dyeing system, including a dyeing kettle 100, a sarong 200 and a dye bin 300, wherein the sarong 200 and the dye bin 300 are both arranged in the cavity of the dyeing kettle 100, the dyeing kettle 100 is provided with a first connecting pipe 110, the sarong 200 is connected to the first connecting pipe 110, the dyeing kettle 100 is further provided with a second connecting pipe 120 and a third connecting pipe 130, the second connecting pipe 120 is connected to the cavity of the dyeing kettle 100, the dye bin 300 is connected to the third connecting pipe 130, the first connecting pipe 110 is connected to a circulation pump 400 and a third connecting pipe 130 in sequence outside the dyeing kettle 100, and the second connecting pipe 120 is connected to a first control valve 500, a circulation pump 400 and a third connecting pipe 130 in sequence outside the dyeing kettle 100.

[0041] The control method of the waterless dyeing system is as follows: in the dye dissolution stage, the first control valve 500 and the circulation pump 400 are opened, and the second connecting pipe 120, the first control valve 500, the circulation pump 400 and the third connecting pipe 130 are connected in sequence to form a bypass loop; in the dyeing stage, the first connecting pipe 110, the circulation pump 400 and the third connecting pipe 130 form a main loop.

[0042] During the dye dissolution stage, due to the small flow resistance of the bypass loop, most of the carbon dioxide is diverted by the bypass loop and enters the inner cavity of the dyeing kettle 100 from the second connecting pipe 120 without passing through the gauze cage 200, and then enters the dye bin 300 from the outside of the dye bin 300. After the dye is dissolved, it flows out from the third connecting pipe 130 and enters the circulation pump 400 to circulate in the bypass loop.

[0043] The waterless dyeing system and control method thereof provided in the first embodiment of the present invention have the following beneficial effects:

[0044] 1. The dye kettle 900 in the prior art is eliminated, and the dye bin 300 is disposed in the cavity of the dye kettle 100. In the waterless dyeing system, the dye kettle 100 is equipped with a sarong 200, and the dye kettle 100 itself is designed to be easy to open and clean. Therefore, the present invention can make the dye bin 300 in the waterless dyeing system easier to clean and replace.

[0045] 2. The second connecting pipe 120 is connected to the first control valve 500, the circulation pump 400 and the third connecting pipe 130 in sequence outside the dyeing kettle 100 to form a bypass loop. The bypass loop does not pass through the gauze cage 200 and can be used to dissolve the dye. After closing the first control valve 500, the bypass loop is disconnected without affecting the dyeing operation of the main loop.

[0046] 3. The dye kettle 900 in the prior art is eliminated, and the design, manufacturing and welding of the dye kettle 100 are saved, and the corresponding pipes, valves and other components are eliminated. It is only necessary to appropriately lengthen the cylinder of the dye kettle 100, which only increases a small amount of material costs. In general, the system pipeline structure is simpler and the overall cost is lower.

[0047] 4. The bypass circuit is used to dissolve the dye, the main circuit is used to perform dyeing operations, and the bypass circuit and the main circuit are switched using the first control valve 500, which fully utilizes the structural design characteristics of the waterless dyeing system and is simple and convenient to operate.

[0048] In an optional embodiment, during the dyeing stage, the first control valve 500 may be closed to block the bypass loop.

[0049] In an optional embodiment, the first control valve 500 also includes a flow regulation function. During the dyeing stage, the flow of the first control valve 500 is opened and regulated, and the bypass circuit has a diversion effect on the main circuit.

[0050] In the waterless dyeing system, dyeing requires a suitable dyeing rate, which is related to the carbon dioxide flow rate passing through the dyed fabric. In the prior art, the carbon dioxide flow rate is adjusted by the power of the circulating pump 400. If the lift flow rate of the circulating pump 400 is too large, some short fibers in the yarn cage 200 will be out of the yarn twist and float out, resulting in production problems such as fuzzing and even breakage; if the lift flow rate of the circulating pump 400 is too small, it is easy to cause poor penetration of the dye solution, resulting in poor penetration, resulting in the phenomenon that the middle layer of the dyed fabric is lighter than the outer layer, resulting in uneven dyeing.

[0051] By using the first control valve 500 with flow regulation function, in the dyeing stage, the bypass circuit plays a role of diverting the main circuit, thereby adjusting the dyeing flow, avoiding excessive flow in the main circuit, and avoiding production problems such as fluffing and even breakage. At the same time, the circulation pump 400 can select a larger head, avoiding production problems that may occur when the head flow of the circulation pump 400 is too small.

[0052] The first control valve 500 can achieve a flow regulation function by adjusting the opening degree.

[0053] In an optional embodiment, if Figure 2 As shown, the inlet pipe of the dye bin 300 is connected to the third connecting pipe 130 via a flexible joint 310 , and the flexible joint 310 makes it easier to disassemble the dye bin 300 .

[0054] Embodiment 2

[0055] like Figures 3 to 5As shown, embodiment 2 of the present invention provides a waterless dyeing system, including a dyeing kettle 100, a sarong 200 and a dye bin 300, the sarong 200 and the dye bin 300 are both arranged in the cavity of the dyeing kettle 100, the dyeing kettle 100 is provided with a first connecting pipe 110, the sarong 200 is connected to the first connecting pipe 110, the dyeing kettle 100 is also provided with a second connecting pipe 120 and a third connecting pipe 130, the second connecting pipe 120 is connected to the cavity of the dyeing kettle 100, the dye bin 300 is connected to the third connecting pipe 130, the first connecting pipe 110 is connected to the circulation pump 400 and the third connecting pipe 130 in sequence outside the dyeing kettle 100, and the second connecting pipe 120 is connected to the first control valve 500, the circulation pump 400 and the third connecting pipe 130 in sequence outside the dyeing kettle 100. The waterless dyeing system also includes a first three-way valve 610 and a second three-way valve 620, wherein the first port of the first three-way valve 610 is connected to the first connecting pipe 110 of the dyeing kettle 100, the second port of the first three-way valve 610 is connected to the circulation pump 400 and the third connecting pipe 130 in sequence, the third port of the first three-way valve 610 is connected to the third connecting pipe 130, the first port of the second three-way valve 620 is connected to the first connecting pipe 110 or the second connecting pipe 120, the second port of the second three-way valve 620 is connected to the circulation pump 400 and the third connecting pipe 130 in sequence, and the third port of the second three-way valve 620 is connected to the third connecting pipe 130.

[0056] The control method of the waterless dyeing system is as follows: in the dye dissolution stage, the first control valve 500 and the circulation pump 400 are opened, the second port and the third port of the first three-way valve 610 are opened, the first port and the second port of the second three-way valve 620 are opened, and the second connecting pipe 120, the first control valve 500, the second three-way valve 620, the circulation pump 400, the first three-way valve 610 and the third connecting pipe 130 are connected in sequence to form a bypass loop.

[0057] In the dyeing stage, the main circuit includes two stages: forward circulation and reverse circulation;

[0058] In the positive circulation stage of the main loop, the third port of the first three-way valve 610 is closed, the first port of the second three-way valve 620 is closed, and the third connecting pipe 130, the second three-way valve 620, the circulation pump 400, the first three-way valve 610 and the first connecting pipe 110 are connected in sequence;

[0059] In the reverse circulation stage of the main loop, the first port of the first three-way valve 610 is closed, the third port of the second three-way valve 620 is closed, and the first connecting pipe 110, the second three-way valve 620, the circulation pump 400, the first three-way valve 610 and the third connecting pipe 130 are connected in sequence.

[0060] Figure 3 This is one of the structural schematic diagrams of the waterless dyeing system provided in the second embodiment of the present invention, in which the waterless dyeing system is in the dye dissolution stage; Figure 4The second structural schematic diagram of the waterless dyeing system provided in the second embodiment of the present invention, in which the waterless dyeing system is in the positive cycle stage of the dyeing stage; Figure 5 The third structural schematic diagram of the waterless dyeing system provided in the second embodiment of the present invention, in which the waterless dyeing system is in the reverse circulation stage of the dyeing stage.

[0061] exist Figures 3 to 5 In the figure, the flow direction of carbon dioxide is shown by arrows, connected pipelines are represented by solid lines, disconnected pipelines are represented by dotted lines, and the on-off status of each port of the first three-way valve 610 and the second three-way valve 620 is represented by hatched lines. The ports with hatched lines are connected, and the ports without hatched lines are disconnected.

[0062] Similar to the first embodiment, the second embodiment also eliminates the dye kettle 900, and the dye chamber 300 is disposed in the dye kettle 100, which can form a bypass loop for dissolving the dye, and has the same beneficial effects, which will not be described again here.

[0063] In addition, the second embodiment also realizes two stages of forward circulation and reverse circulation in the dyeing stage.

[0064] In the positive cycle, carbon dioxide enters the interior of the sarong 200 from the first connecting pipe 110, flows through the dyed fabric and then flows out from the sarong 200, and the carbon dioxide flows through the dyed fabric from the inside to the outside; in the reverse cycle, carbon dioxide enters the dyeing kettle 100 from the third connecting pipe 130, flows out from the dye bin 300, flows through the dyed fabric from the outside of the sarong 200 and then enters the interior of the sarong 200, and the carbon dioxide flows through the dyed fabric from the outside to the inside.

[0065] Through positive and reverse circulation, carbon dioxide can flow through the dyed fabric from the inside to the outside and from the outside to the inside, which can make the dye more evenly distributed in each layer of the dyed fabric and avoid color differences among the inner, middle and outer layers caused by changes in dye concentration.

[0066] In an optional embodiment, if Figure 4 and Figure 5 As shown, in the positive circulation stage and the reverse circulation stage of the main circuit, the flow of the first control valve 500 is opened and adjusted, and the bypass circuit plays a role of shunting the main circuit. As in the first embodiment, in the dyeing stage, the bypass circuit plays a role of shunting the main circuit, thereby adjusting the dyeing flow, avoiding excessive flow in the main circuit, and avoiding production problems such as fuzzing and even breakage. At the same time, the circulation pump 400 can select a larger head, avoiding production problems that may occur when the head flow of the circulation pump 400 is too small.

[0067] like Figure 4 As shown, in the positive cycle stage, the first control valve 500 is not in the loop and cannot play a role in regulating the flow. Figure 5As shown, after the first control valve 500 is opened, a bypass loop that plays a diversion role can be formed.

[0068] like Figure 4 As shown, in the positive circulation stage, when the first control valve 500 is opened, carbon dioxide can enter the dyeing kettle 100 from the first connecting pipe 110 and the second connecting pipe 120 after passing through the circulation pump 400 and the first three-way valve 610, and the bypass circuit can play a diversion role for the main circuit. Figure 5 As shown, in the reverse circulation stage, when the first control valve 500 is opened, carbon dioxide can flow out from the first connecting pipe 110 and the second connecting pipe 120 and enter the second three-way valve 620 and the circulation pump 400, and the bypass circuit can divert the main circuit.

[0069] In an optional embodiment, it also includes a first three-way joint 710, a second three-way joint 720 and a third three-way joint 730, the first three-way joint 710 is respectively connected to the first connecting pipe 110, the first port of the first three-way valve 610 and the second three-way joint 720, the second three-way joint 720 is respectively connected to the second connecting pipe 120, the first three-way joint 710 and the first port of the second three-way valve 620, and the third three-way joint 730 is respectively connected to the third connecting pipe 130, the third port of the first three-way valve 610 and the third port of the second three-way valve 620.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waterless dyeing system, characterized in that: The invention comprises a dyeing kettle (100), a gauze cage (200) and a dye bin (300), wherein the gauze cage (200) and the dye bin (300) are both arranged in the cavity of the dyeing kettle (100), the dyeing kettle (100) is provided with a first connecting pipe (110), the gauze cage (200) is connected to the first connecting pipe (110), the dyeing kettle (100) is further provided with a second connecting pipe (120) and a third connecting pipe (130), the second connecting pipe (120) is connected to the cavity of the dyeing kettle (100), the dye bin (300) is connected to the third connecting pipe (130), the first connecting pipe (110) is connected to a circulation pump (400) and a third connecting pipe (130) in sequence outside the dyeing kettle (100), and the second connecting pipe (120) is connected to a first control valve (500), a circulation pump (400) and a third connecting pipe (130) in sequence outside the dyeing kettle (100).

2. The waterless dyeing system according to claim 1, characterized in that: The first control valve (500) also includes a flow regulation function.

3. The waterless dyeing system according to claim 1, characterized in that: The dyeing machine further comprises a first three-way valve (610) and a second three-way valve (620), wherein the first port of the first three-way valve (610) is connected to the first connecting pipe (110) of the dyeing kettle (100), the second port of the first three-way valve (610) is connected to the circulation pump (400) and the third connecting pipe (130) in sequence, the third port of the first three-way valve (610) is connected to the third connecting pipe (130), the first port of the second three-way valve (620) is connected to the first connecting pipe (110) or the second connecting pipe (120), the second port of the second three-way valve (620) is connected to the circulation pump (400) and the third connecting pipe (130) in sequence, and the third port of the second three-way valve (620) is connected to the third connecting pipe (130).

4. The waterless dyeing system according to claim 3, characterized in that: It also includes a first three-way connector (710), a second three-way connector (720) and a third three-way connector (730), wherein the first three-way connector (710) is respectively connected to the first connecting pipe (110), the first port of the first three-way valve (610) and the second three-way connector (720), the second three-way connector (720) is respectively connected to the second connecting pipe (120), the first three-way connector (710) and the first port of the second three-way valve (620), and the third three-way connector (730) is respectively connected to the third connecting pipe (130), the third port of the first three-way valve (610) and the third port of the second three-way valve (620).

5. The waterless dyeing system according to claim 1, characterized in that: The inlet pipe of the dye bin (300) is connected to the third connecting pipe (130) via a flexible joint (310).

6. A control method for a waterless dyeing system according to claim 1, characterized in that: In the dye dissolution stage, the first control valve (500) and the circulation pump (400) are opened, and the second connecting pipe (120), the first control valve (500), the circulation pump (400) and the third connecting pipe (130) are connected in sequence to form a bypass loop; During the dyeing stage, the first connecting pipe (110), the circulation pump (400) and the third connecting pipe (130) form a main loop.

7. The control method of the waterless dyeing system according to claim 6, characterized in that: During the dyeing stage, the flow rate of the first control valve (500) is opened and adjusted, and the bypass circuit plays a role in diverting the main circuit.

8. The control method of the waterless dyeing system according to claim 6, characterized in that: The waterless dyeing system further comprises a first three-way valve (610) and a second three-way valve (620), wherein a first port of the first three-way valve (610) is connected to a first connecting pipe (110) of the dyeing kettle (100), a second port of the first three-way valve (610) is connected to the circulation pump (400) and a third connecting pipe (130) in sequence, a third port of the first three-way valve (610) is connected to the third connecting pipe (130), a first port of the second three-way valve (620) is connected to the first connecting pipe (110) or the second connecting pipe (120), a second port of the second three-way valve (620) is connected to the circulation pump (400) and the third connecting pipe (130) in sequence, and a third port of the second three-way valve (620) is connected to the third connecting pipe (130); During the dye dissolution stage, the first control valve (500) and the circulation pump (400) are opened, the second port and the third port of the first three-way valve (610) are opened, the first port and the second port of the second three-way valve (620) are opened, and the second connecting pipe (120), the first control valve (500), the second three-way valve (620), the circulation pump (400), the first three-way valve (610) and the third connecting pipe (130) are connected in sequence to form a bypass loop.

9. The control method of the waterless dyeing system according to claim 8, characterized in that: In the dyeing stage, the main circuit includes two stages: forward circulation and reverse circulation; In the positive circulation stage of the main loop, the third port of the first three-way valve (610) is closed, the first port of the second three-way valve (620) is closed, and the third connecting pipe (130), the second three-way valve (620), the circulation pump (400), the first three-way valve (610) and the first connecting pipe (110) are connected in sequence; In the reverse circulation stage of the main loop, the first port of the first three-way valve (610) is closed, the third port of the second three-way valve (620) is closed, and the first connecting pipe (110), the second three-way valve (620), the circulation pump (400), the first three-way valve (610) and the third connecting pipe (130) are connected in sequence.

10. The control method of the waterless dyeing system according to claim 9, characterized in that: During the positive circulation stage and the reverse circulation stage of the main circuit, the flow rate of the first control valve (500) is opened and adjusted, and the bypass circuit plays a role in diverting the main circuit.

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