Yarn dyeing cylinder for waterless dyeing

Abstract

The utility model provides a yarn dyeing drum for waterless dyeing, which relates to the technical field of dyeing equipment and dyeing process, and comprises a central hole pipe and a plurality of bobbin bobbins which are sleeved on the outer surface of the central hole pipe and are linearly distributed at equal intervals, yarns to be dyed are wound outside each bobbin, and under the action of an assembling unit, the yarns to be dyed are assembled on the bobbin bobbins. According to the yarn dyeing barrel, the whole yarn dyeing barrel can be assembled and stabilized, meanwhile, through the effect of the sealing unit, a dyeing medium is prevented from flowing out of a connecting gap between yarn bobbins, circulation of the dyeing medium is facilitated, cost is saved, meanwhile, operation is convenient and easy, batch waterless dyeing production of the yarn dyeing barrel is facilitated, and certain practical significance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dyeing equipment and dyeing processes, and particularly relates to a yarn dyeing cylinder for anhydrous dyeing. Background Art

[0002] Supercritical carbon dioxide anhydrous dyeing is an environmentally friendly dyeing technology. It uses carbon dioxide in a supercritical state as a dye transfer medium without using a large amount of water as a solvent. Compared with traditional water dyeing methods, supercritical carbon dioxide anhydrous dyeing reduces the demand for water resources. This dyeing method can reduce water consumption and environmental impact. Traditional water dyeing requires certain skills and experience. During the supercritical carbon dioxide dyeing process, carbon dioxide has high diffusivity and permeability in the supercritical state and can penetrate more effectively into fiber materials. This dyeing method is usually used for dyeing fiber materials such as textiles and cellulose-based materials. Supercritical carbon dioxide dyeing can achieve uniform and bright dyeing effects. Due to the physical properties of carbon dioxide in the supercritical state, it can interact better with fiber materials, making the dye more evenly distributed in the fibers, thus producing a more saturated and uniform dyeing effect. The supercritical carbon dioxide anhydrous dyeing technology is gradually replacing traditional dyeing methods. This technology has the advantages of high efficiency, no pollution, and high dye utilization rate, and is the development direction of future dyeing technology.

[0003] The yarn dyeing cylinder for traditional water dyeing is a thin-walled cylinder with an inner and outer sleeve at the end, and its end is pressed by a mold. For water dyeing, the leakage amount at the connection gap between the two cylinders has little impact on the overall flow rate. However, for supercritical carbon dioxide anhydrous dyeing, the amount of supercritical carbon dioxide lost through the gap has a greater impact on the dyeing effect and better sealing is required. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a yarn dyeing cylinder for anhydrous dyeing to solve the problem that the supercritical carbon dioxide lost at the gap between two adjacent yarn dyeing cylinders affects the dyeing effect during supercritical carbon dioxide anhydrous dyeing, seal the gap, and at the same time make the operation of the yarn dyeing equipment convenient and simple, meeting the actual needs of its batch anhydrous dyeing production.

[0005] A yarn dyeing cylinder for anhydrous dyeing provided by the utility model includes:

[0006] A central hole tube, and a plurality of tube yarns sleeved on the outer surface of the central hole tube and distributed at equal intervals in a straight line. And a yarn to be dyed is wound around the outside of each tube yarn.

[0007] Both the central hole tube and the tube yarn are thin-walled cylinders with a plurality of small holes opened on the arc surface.

[0008] It further includes:

[0009] An assembly unit for fixing a plurality of the bobbin tubes and the central hole tubes, the assembly unit being located at both ends of the central hole tube;

[0010] A sealing unit for sealing the connection parts of a plurality of the bobbin tubes and the central hole tube, the sealing unit being distributed at both ends of each of the bobbin tubes.

[0011] In an alternative embodiment,

[0012] The assembly unit includes an upper column and a base fixedly arranged at the upper and lower ends of the central hole tube;

[0013] The upper column includes a threaded section, a sealing section and a connecting section, and the three are distributed from top to bottom. The connecting section closes the upper port of the central hole tube, and the outer diameters of the threaded section, the sealing section and the connecting section increase gradually;

[0014] A plurality of the bobbin tubes are stacked and sleeved outside the central hole tube, two adjacent bobbin tubes are butted against each other, and the lowermost bobbin tube is movably assembled on the upper part of the base;

[0015] A gland is arranged outside the upper column, and the gland is slidably sleeved outside the sealing section. The bottom of the gland is butted against the top of the uppermost bobbin tube. A nut is threadedly assembled on the outer surface of the threaded section, and a sealing member is arranged between the sealing section and the gland.

[0016] In an alternative embodiment,

[0017] The sealing member includes a groove formed on the outer surface of the sealing section, a first sealing ring is placed inside the groove, and the diameter of the cross-sectional circle of the first sealing ring is larger than the depth of the groove.

[0018] In an alternative embodiment,

[0019] The sealing unit includes upper rings fixedly arranged at the tops of a plurality of the bobbin tubes and the base, and lower rings fixedly arranged at the bottoms of a plurality of the bobbin tubes and the gland. The upper rings and the lower rings are both stepped, and a second O-ring is placed between the upper rings and the lower rings.

[0020] In an alternative embodiment,

[0021] The stepped part of the upper ring includes a horizontal first plane and a vertical first annular cylindrical surface. An inner groove is provided at the junction of the first plane and the first annular cylindrical surface. The stepped part of the lower ring includes a horizontal second plane and a vertical second annular cylindrical surface. A sealing inclined surface is provided between the second annular cylindrical surface and the second plane. The second O-ring is located between the inner groove and the sealing inclined surface. The first plane and the second plane are in contact with each other, and the diameter of the first annular cylindrical surface is smaller than the diameter of the second annular cylindrical surface.

[0022] In an alternative embodiment,

[0023] The diameters of the inscribed circles of the three planes, namely the sealing inclined surface, the first plane, and the plane of the inner groove in the vertical direction, are smaller than the diameter of the cross-sectional circle of the second O-ring.

[0024] In an alternative embodiment,

[0025] The sealing section is cylindrical, the outer diameter of the connecting section is the same as the outer diameter of the central hole tube, and the connecting section is fixedly welded to the upper end of the central hole tube.

[0026] In an alternative embodiment,

[0027] The upper end of the gland is cylindrical, and the outer diameter of the first sealing ring is not less than the minimum inner diameter of the gland.

[0028] In an alternative embodiment,

[0029] The minimum inner diameter of the gland is greater than the outer diameter of the sealing section.

[0030] In an alternative embodiment,

[0031] A through hole is provided at the center of the base.

[0032] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0033] A yarn dyeing cylinder for waterless dyeing provided by the present utility model can assemble the whole yarn dyeing cylinder and play a stabilizing role under the action of the assembly unit; at the same time, through the action of the sealing unit, it can prevent the dyeing medium from flowing out of the gap between the bobbin tubes, which is beneficial to the circulation of the dyeing medium, saves costs, and is convenient and simple to operate, which is beneficial to the batch production of waterless dyeing of yarn dyeing cylinders and has certain practical significance. Description of the Drawings

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 Schematic diagram of a yarn dyeing cylinder structure for waterless dyeing provided by an embodiment of the present invention;

[0036] Figure 2 Schematic diagram of a central hole tube and a bobbin tube structure provided by an embodiment of the present invention;

[0037] Figure 3 Provided by an embodiment of the present invention Figure 1 Enlarged view of part A in

[0038] Figure 4 Provided by an embodiment of the present invention Figure 1 Enlarged view of part B in

[0039] Figure 5 Schematic diagram of the upper ring and the lower ring processed by die extrusion provided by an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the lower ring structure provided by an embodiment of the present invention;

[0041] Figure 7 Schematic diagram of the upper ring structure provided by an embodiment of the present invention.

[0042] Icon: 1, central hole tube; 2, bobbin tube; 3, yarn; 4, upper end post; 5, base; 6, threaded section; 7, sealing section; 8, connecting section; 9, gland; 10, nut; 11, groove; 12, first sealing ring; 13, second O-ring; 14, upper ring; 15, lower ring; 16, first plane; 17, first annular cylindrical surface; 18, inner groove; 19, second annular cylindrical surface; 20, second plane; 21, sealing inclined surface. Specific embodiments

[0043] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0047] Embodiment 1

[0048] Please refer to Figure 1 — Figure 7 , a yarn dyeing cylinder for anhydrous dyeing provided in this embodiment includes:

[0049] A central hole tube 1, and a plurality of bobbin tubes 2 arranged in a straight line and equidistantly distributed on the outer surface of the central hole tube 1, and a yarn 3 to be dyed is wound around the outside of each bobbin tube 2;

[0050] Both the central hole tube 1 and the bobbin tube 2 are thin-walled cylinders with a plurality of small holes opened on the arc surface;

[0051] It further includes:

[0052] An assembly unit for fixing a plurality of the bobbin tubes 2 and the central hole tube 1, and the assembly unit is located at both ends of the central hole tube 1;

[0053] A sealing unit for sealing the connection parts of a plurality of the bobbin tubes 2 and the central hole tube 1, and the sealing unit is distributed at both ends of each bobbin tube 2.

[0054] A yarn dyeing cylinder for waterless dyeing provided in this embodiment can assemble the whole yarn dyeing cylinder under the action of the assembly unit and play a stabilizing role; at the same time, under the action of the sealing unit, it can prevent the dyeing medium from flowing out of the gap between the bobbin tubes 2, which is beneficial to the circulation of the dyeing medium, saves costs, and is convenient and simple to operate. It is beneficial to the batch production of cheese yarn waterless dyeing and has certain practical significance.

[0055] Based on the above embodiment, in the yarn dyeing cylinder for waterless dyeing provided in this embodiment, the assembly unit includes an upper column 4 and a base 5 fixedly arranged at the upper and lower ends of the central hole tube 1;

[0056] The use of the base 5 makes the placement of the central hole tube 1 on the horizontal plane more stable, avoiding the shaking of the yarn dyeing cylinder during the waterless dyeing process. The use of the upper column 4 makes the sleeving between the bobbin tube 2 and the central hole tube 1 more stable.

[0057] The upper column 4 includes a threaded section 6, a sealing section 7 and a connecting section 8, and the three are distributed from top to bottom. The connecting section 8 closes the upper port of the central hole tube 1, and the outer diameters of the threaded section 6, the sealing section 7 and the connecting section 8 increase gradually;

[0058] The outer diameters of the threaded section 6, the sealing section 7 and the connecting section 8 in the upper column 4 increase gradually, making the seal between the uppermost bobbin tube 2 and the central hole tube 1 tighter to prevent the overflow of the dyeing medium. At the same time, the gradual increase of its outer diameter reduces the possibility of the dyeing medium overflowing from the yarn dyeing cylinder.

[0059] A plurality of the bobbin tubes 2 are sleeved on the outside of the central hole tube 1 in a stacked manner, and two adjacent bobbin tubes 2 are butted against each other. The lowermost bobbin tube 2 is movably assembled on the upper part of the base 5;

[0060] A plurality of bobbin tubes 2 are sleeved on the outside of the central hole tube 1, making the overall assembly of the dyeing equipment complete and strengthening the stability of the equipment.

[0061] A gland 9 is arranged outside the upper column 4, and the gland 9 is slidably sleeved outside the sealing section 7. The bottom of the gland 9 is butted against the top of the uppermost bobbin tube 2. A nut 10 is threadedly assembled on the outer surface of the threaded section 6, and a seal is arranged between the sealing section 7 and the gland 9;

[0062] The gland 9 outside the upper column 4 can slide outside the sealing section 7, so that the gland 9 seals between the uppermost bobbin tube 2 and the sealing section 7 at the top of the central hole tube 1, preventing the loss of the dyeing medium and saving costs.

[0063] The seal includes a groove 11 formed on the outer surface of the seal section 7. A first sealing ring 12 is placed inside the groove 11, and the diameter of the cross-sectional circle of the first sealing ring 12 is greater than the depth of the groove 11.

[0064] The diameter of the cross-sectional circle of the first sealing ring 12 is greater than the depth of the groove 11, so that the first sealing ring 12 can protrude from the groove 11, enabling the first sealing ring 12 to be extruded and deformed when assembled by the gland 9.

[0065] The sealing unit includes upper rings 14 fixedly arranged at the tops of several of the bobbin tubes 2 and the base 5, and lower rings 15 fixedly arranged at the bottoms of several of the bobbin tubes 2 and the gland 9. The upper rings 14 and the lower rings 15 are both stepped. A second O-ring 13 is placed between the upper ring 14 and the lower ring 15.

[0066] The connection between the upper ring 14 and the lower ring 15 for the bobbin tube 2, the base 5, and the gland 9 makes the joints between the three fit together to prevent the dyeing medium from leaking through the gaps.

[0067] The stepped part of the upper ring 14 includes a horizontal first plane 16 and a vertical first annular cylindrical surface 17. An inner groove 18 is formed at the junction of the first plane 16 and the first annular cylindrical surface 17. The stepped part of the lower ring 15 includes a horizontal second plane 20 and a vertical second annular cylindrical surface 19. A sealing inclined surface 21 is arranged between the second annular cylindrical surface 19 and the second plane 20. The second O-ring 13 is located between the inner groove 18 and the sealing inclined surface 21. The first plane 16 and the second plane 20 are in contact. The diameter of the first annular cylindrical surface 17 is smaller than the diameter of the second annular cylindrical surface 19.

[0068] The inner groove 18 facilitates the placement of the second O-ring 13, preventing the second O-ring 13 from falling off during the use of the yarn dyeing cylinder. When the bobbin tube 2 is sleeved, the lower ring 15 is sleeved outside the upper ring 14 and lands on the first plane 16. The sealing inclined surface 21 of the lower ring 15 just presses on the second O-ring 13, enabling the second O-ring 13 to seal whether the dyeing medium flows from the inside to the outside or from the outside to the inside. Due to the limitation of the first plane 16, after the sealing inclined surface 21 contacts the second O-ring 13, the degree of deformation of the second O-ring 13 is certain, and continuous pressure is not applied to the second O-ring 13, preventing the second O-ring 13 from being damaged.

[0069] The diameters of the inscribed circles of the three planes of the sealing inclined surface 21, the first plane 16, and the inner groove 18 in the vertical direction are smaller than the diameter of the cross-sectional circle of the second O-ring 13.

[0070] The difference between the diameters of the inscribed circles of the three planes and the cross-sectional circle of the second O-ring 13, and at the same time, the second O-ring 13 has a certain deformation ability, so that the second O-ring 13 can make the fit between the upper ring 14 and the lower ring 15 closer.

[0071] The sealing section 7 is cylindrical, the outer diameter of the connecting section 8 is the same as the outer diameter of the central hole tube 1, and the connecting section 8 is fixedly welded to the upper end of the central hole tube 1;

[0072] The outer diameter of the connecting section 8 is the same as the outer diameter of the central hole tube 1, so that the gland 9 can slide outside the sealing section 7, and at the same time, the two are fixedly welded, so that the top of the central hole tube 1 is closed.

[0073] The upper end of the gland 9 is cylindrical, and the outer diameter of the first O-ring 12 is not less than the minimum inner diameter of the gland 9;

[0074] The outer diameter of the first O-ring 12 is not less than the minimum inner diameter of the gland 9, and at the same time, the first O-ring 12 has a certain deformation ability, so that the first O-ring 12 can closely fit between the gland 9 and the groove 11.

[0075] The minimum inner diameter of the gland 9 is greater than the outer diameter of the sealing section 7;

[0076] The minimum inner diameter of the gland 9 being greater than the outer diameter of the sealing section 7 enables the gland 9 to slide outside the sealing section 7 to fix and squeeze the uppermost bobbin tube 2, making the connection between several dyeing bobbins closer.

[0077] A through hole is provided at the center of the base 5;

[0078] The through hole allows the dyeing medium to enter the interior of the central hole tube 1.

[0079] Working principle:

[0080] The operator first seals and connects the lower ring 15 of a bobbin tube 2 and the upper ring 14 at the top of the base 5 through the second O-ring 13, so that the bobbin tube 2 connected to the base 5 is fixed. Then, repeat the above operation from bottom to top. By using the lower ring 15, the upper ring 14 and the second O-ring 13, several bobbin tubes 2 are connected in sequence. Secondly, the first O-ring 12 is placed in the groove 11, then the uppermost bobbin tube 2 is connected to the gland 9, and finally, the nut 10 is rotated into the threaded hole of the threaded section 6 to tighten it to prevent the gland 9 from loosening.

[0081] After the staff turns on the device, the dyeing medium enters the interior of the central hole tube 1 through the through hole opened in the center of the base 5, passes through the small holes on the wall of the central hole tube 1, enters the cheese tube 2, then passes through the small holes on the wall of the cheese tube 2, enters the yarn 3, and dyes the yarn 3. During the reverse circulation, the flow direction is opposite.

[0082] The first sealing ring 12 and the second O-ring 13 enable both the forward and reverse circulations to effectively seal the connection parts between several cheese tubes 2 and the central hole tube 1. When the dyeing medium circulates, it must pass through the yarn 3, and there is no other path to short-circuit the yarn 3, ensuring the dyeing effect on the yarn 3. At the same time, through the structure between the lower ring 15 and the upper ring 14, it is ensured that the second O-ring 13 will not be overly squeezed, improving the durability of the second O-ring 13.

[0083] Embodiment 2

[0084] Please refer to Figure 4 , another processing method of the upper ring 14 and the lower ring 15 recorded in this embodiment is as follows:

[0085] The upper ring 14 and the lower ring 15 are machined parts and are respectively welded to both ends of the cheese tube 2.

[0086] In this embodiment:

[0087] The upper ring 14 and the lower ring 15 cut materials through a machine tool and a cutter, thereby processing the materials into the required shapes and sizes. At the same time, machining can be applied to various metal materials. The machined parts make the first plane 16, the first annular cylindrical surface 17, and the inner groove 18 in the upper ring 14, and the second plane 20, the second annular cylindrical surface 19, and the sealing inclined surface 21 in the lower ring 15 have high precision, smooth surfaces, and high dimensional accuracy and processing quality, making the overall assembly of the yarn dyeing cylinder more compact.

[0088] Embodiment 3

[0089] Please refer to Figure 5 , another processing method of the upper ring 14 and the lower ring 15 recorded in this embodiment is as follows:

[0090] The upper ring 14 and the lower ring 15 are formed by one-time extrusion of both ends of the cheese tube 2 using a mold.

[0091] In this embodiment:

[0092] The upper ring 14 and the lower ring 15 use a mold to plastically deform both ends of the cheese tube 2 through impact or pressure, thereby forming the structures of the upper ring 14 and the lower ring 15. Mold extrusion can carry out efficient mass production, which is beneficial to the batch production of the yarn dyeing cylinder for waterless dyeing.

[0093] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 yarn-dyeing cylinder for anhydrous dyeing, characterized in that, Comprising: A central hole tube (1), and a number of bobbin tubes (2) evenly distributed at equal intervals in a straight line and sleeved on the outer surface of the central hole tube (1), and yarns (3) to be dyed are wound around the outside of each bobbin tube (2); Both the central hole tube (1) and the bobbin tubes (2) are thin-walled cylinders with a number of small holes opened on the arc surface; Further comprising: An assembly unit for fixing a number of the bobbin tubes (2) and the central hole tube (1), and the assembly unit is located at both ends of the central hole tube (1); A sealing unit for sealing the connection parts of a number of the bobbin tubes (2) and the central hole tube (1), and the sealing unit is distributed at both ends of each bobbin tube (2).

2. The yarn dyeing cylinder for anhydrous dyeing according to claim 1, wherein The assembly unit includes an upper column (4) and a base (5) fixedly arranged at the upper and lower ends of the central hole tube (1); The upper column (4) includes a threaded section (6), a sealing section (7) and a connecting section (8), and the three are distributed from top to bottom. The connecting section (8) closes the upper port of the central hole tube (1), and the outer diameters of the threaded section (6), the sealing section (7) and the connecting section (8) increase gradually; A number of the bobbin tubes (2) are sleeved on the outside of the central hole tube (1) in a stacked manner, and two adjacent bobbin tubes (2) are butted against each other. The lowermost bobbin tube (2) is movably assembled on the upper part of the base (5); A gland (9) is arranged on the outside of the upper column (4), and the gland (9) is slidably sleeved on the outside of the sealing section (7). The bottom of the gland (9) is butted against the top of the uppermost bobbin tube (2). A nut (10) is threadedly assembled on the outer surface of the threaded section (6), and a sealing member is arranged between the sealing section (7) and the gland (9).

3. The yarn dyeing cylinder for anhydrous dyeing according to claim 2, wherein The sealing member includes a groove (11) opened on the outer surface of the sealing section (7), a first sealing ring (12) is placed inside the groove (11), and the diameter of the cross-sectional circle of the first sealing ring (12) is greater than the depth of the groove (11).

4. The yarn dyeing cylinder for anhydrous dyeing according to claim 2, wherein The sealing unit includes upper rings (14) fixedly arranged on the tops of a number of the bobbin tubes (2) and the base (5), and lower rings (15) fixedly arranged on the bottoms of a number of the bobbin tubes (2) and the gland (9). The upper rings (14) and the lower rings (15) are both stepped, and a second O-ring (13) is placed between the upper rings (14) and the lower rings (15).

5. The yarn dyeing cylinder for anhydrous dyeing according to claim 4, wherein The stepped portion of the upper ring (14) includes a horizontal first plane (16) and a vertical first annular cylindrical surface (17). An inner groove (18) is formed at the junction of the first plane (16) and the first annular cylindrical surface (17). The stepped portion of the lower ring (15) includes a horizontal second plane (20) and a vertical second annular cylindrical surface (19). A sealing inclined surface (21) is provided between the second annular cylindrical surface (19) and the second plane (20). The second O-ring (13) is located between the inner groove (18) and the sealing inclined surface (21). The first plane (16) abuts against the second plane (20), and the diameter of the first annular cylindrical surface (17) is smaller than the diameter of the second annular cylindrical surface (19).

6. The yarn dyeing cylinder for anhydrous dyeing according to claim 5, wherein For the vertical planes of the sealing inclined surface (21), the first plane (16) and the inner groove (18), the diameters of the inscribed circles of the three planes are smaller than the diameter of the cross-sectional circle of the second O-ring (13).

7. The yarn dyeing cylinder for anhydrous dyeing according to claim 2, wherein The sealing section (7) is cylindrical, the outer diameter of the connecting section (8) is the same as the outer diameter of the central hole tube (1), and the connecting section (8) is fixedly welded to the upper end of the central hole tube (1).

8. The yarn dyeing cylinder for anhydrous dyeing according to claim 3, wherein The upper end of the gland (9) is cylindrical, and the outer diameter of the first sealing ring (12) is not less than the minimum inner diameter of the gland (9).

9. The yarn dyeing cylinder for anhydrous dyeing according to claim 2, wherein The minimum inner diameter of the gland (9) is larger than the outer diameter of the sealing section (7).

10. The yarn dyeing cylinder for anhydrous dyeing according to claim 2, wherein A through hole is formed at the center of the base (5).

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