A jet vortex spinning nozzle device with low air consumption

Abstract

The present invention relates to a jet vortex spinning nozzle device with low air consumption. Inside the air chamber cover and the exhaust cover, a fiber guiding assembly, a vortex tube, and a yarn drawing cone are sequentially arranged from upstream to downstream. The axial length of the first frustum-shaped hole of the vortex tube is 7.3 mm to 8.1 mm. The intersection line of the first frustum-shaped hole and the second frustum-shaped hole of the vortex tube is located downstream of the intersection line of the first cone section and the second cone section of the yarn drawing cone. The diameter at the entrance of the first frustum-shaped hole is 4.6 mm to 4.9 mm, the diameter of the air jet hole is 0.4 mm to 0.5 mm, and the length of the common perpendicular line segment between the axis of the air jet hole and the axis of the vortex tube is 36% to 47% of the diameter at the entrance of the first frustum-shaped hole. The jet vortex spinning nozzle device of the present invention can effectively reduce the air consumption required during the yarn twisting process, and at the same time can ensure that the yarn quality remains at a high level, which is beneficial to the energy conservation, consumption reduction and high-efficiency production of the jet vortex spinning machine.

Description

Technical Field

[0001] The invention relates to an air jet vortex spinning nozzle device with low air consumption, belonging to the field of spinning machinery and technology. Background Art

[0002] The jet vortex spinning technology uses the high-speed rotating airflow formed in the nozzle to twist the fiber whiskers into yarn. As an efficient textile process, it has been rapidly developed in textile production. In the spinning process of the jet vortex spinning machine, the fiber whiskers output by the front roller are attracted by the negative pressure in the nozzle and enter the nozzle along the fiber guide channel. The compressed air enters the nozzle through the nozzle hole located on the inner wall of the vortex chamber to form a high-speed rotating airflow. At the guide needle, the head end of the fiber whiskers is pulled into the yarn guide hole inside the yarn guide cone under the drag of the tail end of the formed yarn to become the yarn core. After the tail end of the fiber whiskers is separated from the grip of the front roller, it falls on the head end of the yarn guide cone under the action of the airflow in the vortex chamber, and at the same time, it is wrapped around the yarn core along the direction of the rotating airflow, forming a jet vortex yarn with a wrapping structure, which is then output from the yarn guide hole. The nozzle is the core component of the jet vortex spinning machine, and its structure has a key influence on the quality of the jet vortex yarn. For this reason, all equipment manufacturers are continuously improving the design of the structure of the jet vortex spinning nozzle. For example, the Chinese invention patent application with application publication number CN112501729A discloses a spinning unit, an air spinning device, a spinning machine and a spinning method. In the spinning device, the angle between the axis of the guide cone and the axis of the airflow injection hole is more than 60° and less than 80°, and the length of the spinning chamber is less than the length of the fiber guide body; another example is the Chinese invention patent application with application publication number CN115003868A discloses a spinning device, the fiber guide body at the entrance of which is provided with two side-by-side needles, and the two needles at least partially protrude into the axial position where the outlet of the airflow injection hole is located. However, during the jet vortex spinning process, the air consumption of the nozzle device is very high, which is one of the main sources of energy consumption of the equipment. Under the condition of increasingly tight energy supply, further reducing the air consumption of the jet vortex spinning nozzle device under the premise of stabilizing the yarn quality is of great significance to the jet vortex spinning production enterprises to reduce production costs and improve economic benefits.

[0003] Therefore, the technical field needs to solve the problem of how to provide a jet vortex spinning nozzle device with low air consumption so as to reduce the air consumption required in the yarn twisting process while maintaining a high level of yarn quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a jet vortex spinning nozzle device which can maintain a high level of yarn quality and reduce the air consumption required in the yarn twisting process.

[0005] To solve the above technical problems, the technical solution of the present invention is: a jet vortex spinning nozzle device with low air consumption, characterized in that it includes an air chamber cover, an exhaust cover, and a bottom cover of the exhaust cover installed in sequence from upstream to downstream. Inside the upper parts of the air chamber cover and the exhaust cover, a fiber guiding component and a vortex tube are sequentially arranged from upstream to downstream. The annular area formed by the air chamber cover, the fiber guiding component, and the vortex tube constitutes an air chamber. Inside the lower part of the exhaust cover, there is a cone upper retaining member. The yarn guiding cone and the cone lower retaining member are connected into a whole by the cone upper retaining member. Inside the yarn guiding cone and the cone lower retaining member, there is a yarn guiding tube. On the yarn guiding cone, there are a first cone section and a second cone section. The upstream parts of the first cone section and the second cone section extend into the vortex tube. Inside the vortex tube, there are sequentially arranged a first cylindrical hole, a second cylindrical hole, a first frustum-shaped hole, and a second frustum-shaped hole from upstream to downstream. A first annular vortex chamber is formed between the vortex tube and the first cone section of the yarn guiding cone, and a second annular vortex chamber is formed between the vortex tube and the second cone section of the yarn guiding cone. The first annular vortex chamber is communicated with the second annular vortex chamber. The vortex tube is provided with a plurality of air flow injection holes communicated with the air chamber and the first annular vortex chamber. The air flow injection holes face the first annular vortex chamber and are inclined downward in the downstream direction. The outlet of the air flow injection hole is located on the step between the second cylindrical hole and the first frustum-shaped hole. The axial length of the first frustum-shaped hole is 7.3 mm to 8.1 mm;

[0006] Further, the intersection line of the first frustum-shaped hole and the second frustum-shaped hole of the vortex tube is located downstream of the intersection line of the first cone section and the second cone section of the yarn guiding cone;

[0007] Further, the diameter at the entrance of the first frustum-shaped hole is 4.6 mm to 4.9 mm;

[0008] Further, the diameter of the air flow injection hole is 0.4 mm to 0.5 mm;

[0009] Further, the number of the air flow injection holes is 3 to 5;

[0010] Further, the length of the common perpendicular line segment between the axis of the air flow injection hole and the axis of the vortex tube is 36% to 47% of the diameter at the entrance of the first frustum-shaped hole;

[0011] Further, the included angle between the axis of the air flow injection hole and the axis of the vortex tube is 60°;

[0012] Further, the diameter of the first cylindrical hole is larger than that of the second cylindrical hole, the diameter of the second cylindrical hole is smaller than the diameter at the inlet of the first frustum-shaped hole, the diameter at the outlet of the first frustum-shaped hole is equal to the diameter at the inlet of the second frustum-shaped hole, the diameter at the inlet of the second frustum-shaped hole is smaller than the diameter at the outlet of the second frustum-shaped hole. The first cylindrical hole, the second cylindrical hole, the first frustum-shaped hole and the second frustum-shaped hole are coaxially arranged. The cone angle of the first frustum-shaped hole is adapted to the cone angle of the first cone section of the yarn guiding cone, and the cone angle of the second frustum-shaped hole is adapted to the cone angle of the second cone section of the yarn guiding cone.

[0013] Further, the fiber guiding assembly includes a guiding body, a guiding body housing and guiding needles. A spiral surface is provided on the guiding body, and guiding needles are installed at the downstream end of the guiding body. The spiral direction of the spiral surface is the same as the spiral direction of the high-speed rotating air flow in the eddy current tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] In the jet vortex spinning nozzle device of the present invention, by setting the axial length of the first frustum-shaped hole of the eddy current tube to be 7.3 mm to 8.1 mm, setting the intersection line of the first frustum-shaped hole and the second frustum-shaped hole to be downstream of the intersection line of the first cone section and the second cone section of the yarn guiding cone, setting the diameter at the inlet of the first frustum-shaped hole to be 4.6 mm to 4.9 mm, setting the diameter of the air injection holes to be 0.4 mm to 0.5 mm, setting the number of the air injection holes to be 3 to 5, and setting the length of the common perpendicular line segment between the axis of the air injection holes and the axis of the eddy current tube to be 36% to 47% of the diameter at the inlet of the first frustum-shaped hole, the nozzle device can spin under the working condition that the total air pressure in the air chamber is 0.4 MPa to 0.5 MPa and ensure that the yarn quality is maintained at a relatively high level. It can effectively reduce the air consumption required during the yarn twisting process, which is beneficial to the energy saving, consumption reduction and high-efficiency production of the jet vortex spinning machine. Description of the Drawings

[0016] Figure 1 is a perspective cross-sectional view of the jet vortex spinning nozzle device of the present invention in the spinning state;

[0017] Figure 2 is a longitudinal cross-sectional view of the general structure of the jet vortex spinning nozzle device of the present invention;

[0018] Figure 3 is a perspective view of the eddy current tube of the present invention;

[0019] Figure 4 is a longitudinal cross-sectional view of the general structure of the eddy current tube of the present invention;

[0020] Figure 5 is a transverse cross-sectional view of the general structure near the air injection holes of the eddy current tube of the present invention. Detailed Embodiments

[0021] To make the present invention more obvious and understandable, the following is a detailed description with preferred embodiments and in conjunction with the accompanying drawings.

[0022] Figures 1 to 5 Shown is a jet vortex spinning nozzle device 41 with low air consumption provided in this embodiment. As Figure 1 shown, the fiber strand 1 drafted by a drafting mechanism (not shown in the figure) enters the interior of the nozzle device 41 and is twisted into yarn under the action of the high-speed rotating air flow 42. Specifically, the fiber strand 1 enters the vortex tube 7 through the fiber guiding assembly 6, is spun into the yarn 46 under the action of the high-speed rotating air flow 42, enters the yarn guiding tube 17 through the yarn guiding cone 13, and is output from the nozzle device 41, and is wound onto a winding device (not shown in the figure).

[0023] As Figure 2 shown, the jet vortex spinning nozzle device 41 includes an air chamber cover 19, an exhaust cover 20, and an exhaust cover bottom cover 24 installed in sequence from upstream to downstream. Inside the upper parts of the air chamber cover 19 and the exhaust cover 20, a fiber guiding assembly 6 and a vortex tube 7 are provided in sequence from upstream to downstream. The annular area formed by the air chamber cover 19 and the fiber guiding assembly 6 and the vortex tube 7 constitutes an air chamber 28. Inside the lower part of the exhaust cover 20, a cone upper holder 22 is provided. The cone upper holder 22 connects the yarn guiding cone 13 and the cone lower holder 23 into a whole. Inside the yarn guiding cone 13 and the cone lower holder 23, a yarn guiding tube 17 is provided. The yarn guiding cone 13, the cone upper holder 22, the yarn guiding tube 17, and the cone lower holder 23 are coaxially arranged. A yarn guiding through hole 14 is provided at the axis of the yarn guiding cone 13, a yarn passage 18 is provided at the axis of the yarn guiding tube 17, and a yarn guiding channel 27 communicating with the yarn guiding through hole 14 and the yarn passage 18 is provided at the axis of the downstream section of the cone lower holder 23. An adjusting knob 26 is provided on the exhaust cover bottom cover 24, and the adjusting knob 26 is connected to the cone lower holder 23 by a thread.

[0024] The fiber guiding assembly 6 includes a guiding body 4, a guiding body housing 2, and guiding needles 5. Among them, the guiding body 4 is provided with a spiral surface 3 and guiding needles 5 installed at the downstream end of the guiding body 4. The spiral direction of the spiral surface 3 is the same as the spiral direction of the high-speed rotating air flow 42 in the vortex tube 7. In this embodiment, looking from upstream to downstream, it is counterclockwise.

[0025] As Figures 3 to 5As shown, the external shape of the vortex tube 7 is a rotating body composed of four cylinders with different diameters. Inside, a first cylindrical hole 9, a second cylindrical hole 10, a first frustum-shaped hole 11, and a second frustum-shaped hole 12 are provided in sequence from upstream to downstream. The diameter of the first cylindrical hole 9 is larger than that of the second cylindrical hole 10. The diameter of the second cylindrical hole 10 is smaller than the diameter at the entrance of the first frustum-shaped hole 11. The diameter at the exit of the first frustum-shaped hole 11 is equal to the diameter at the entrance of the second frustum-shaped hole 12. The diameter at the entrance of the second frustum-shaped hole 12 is smaller than the diameter at the exit of the second frustum-shaped hole 12. The first cylindrical hole 9, the second cylindrical hole 10, the first frustum-shaped hole 11, and the second frustum-shaped hole 12 are coaxially arranged. The depth of the first cylindrical hole 9 is much smaller than its diameter and is used to support the fiber guiding assembly 6. A first annular vortex chamber 38 is formed between the vortex tube 7 and the first conical section 15 of the yarn guiding cone 13, and a second annular vortex chamber 37 is formed between the vortex tube 7 and the second conical section 16 of the yarn guiding cone 13. The first annular vortex chamber 38 communicates with the second annular vortex chamber 37. There are 3 to 5 air jet holes 8 on the vortex tube 7, which are inclined at an angle of 60° to the axis of the vortex tube 7 and are equally spaced circumferentially. Figure 5 The situation where there are 5 air jet holes 8 is shown. The air jet holes 8 face the inner cavity of the first frustum-shaped hole 11 and are inclined in the downstream direction. The entrance of the air jet holes 8 communicates with the air chamber 28, and the exit of the air jet holes 8 is located on the step between the second cylindrical hole 10 and the first frustum-shaped hole 11. Compressed air enters the air chamber 28 from a compressed air source not shown in the figure, and then is injected into the interior of the vortex tube 7 through the air jet holes 8, thereby forming a high-speed rotating airflow 42 in the vortex tube 7. The axial length of the first frustum-shaped hole 11 is 7.3 mm to 8.1 mm, the diameter at the entrance of the first frustum-shaped hole 11 is 4.6 mm to 4.9 mm, the diameter of the air jet holes 8 is 0.4 mm to 0.5 mm, and the length d of the common perpendicular segment between the axis 47 of the air jet holes 8 and the axis of the vortex tube 7 is 36% to 47% of the diameter at the entrance of the first frustum-shaped hole 11.

[0026] The yarn guiding cone 13 is provided with a first conical section 15 and a second conical section 16, and the upstream parts of the first conical section 15 and the second conical section 16 extend into the vortex tube 7.

[0027] The cone upper retainer 22 is integrally disc-shaped. A through hole composed of a small-diameter section hole and a large-diameter section hole is provided at its center. Four upper exhaust slots 29 and four upper bolt mounting holes 31 that are symmetrically distributed and penetrate along the thickness direction are provided near the periphery. The upper exhaust slots 29 are approximately waist-shaped. The cone lower retainer 23 is located downstream of the cone upper retainer 22 and includes a large-diameter cylindrical section, a small-diameter cylindrical section, and an air inlet pipe 33 connected to the small-diameter cylindrical section. The large-diameter cylindrical section is located upstream of the small-diameter cylindrical section and has a thickness smaller than that of the small-diameter cylindrical section. Four middle exhaust slots 30 and four middle bolt mounting holes 32 that are symmetrically distributed and penetrate along the thickness direction are provided near the periphery of the large-diameter cylindrical section. Among them, the cross-sectional shape and size of the middle exhaust slots 30 are the same as those of the upper exhaust slots 29, and their positions correspond one by one. The positions of the middle bolt mounting holes 32 correspond one by one to those of the upper bolt mounting holes 31. A large-diameter section hole is provided at the inner central axis of the upstream section between the large-diameter cylindrical section and the small-diameter cylindrical section of the cone lower retainer 23. There is a middle-diameter section hole with a smaller length downstream of the large-diameter section hole, and there is a small-diameter section through hole with a longer length downstream of the middle-diameter section hole. The small-diameter section through hole constitutes the yarn guiding channel 27. The yarn guiding cone 13 and the yarn guiding tube 17 are installed between the cone upper retainer 22 and the cone lower retainer 23. The cone upper retainer 22 and the cone lower retainer 23 are connected together by bolts (not shown in the figure) through the upper bolt mounting holes 31 and the middle bolt mounting holes 32. The yarn guiding through hole 14 of the yarn guiding cone 13, the yarn passage 18 of the yarn guiding tube 17, and the yarn guiding channel 27 of the cone lower retainer 23 are coaxially arranged and connected in sequence. The axis of the air inlet pipe 33 is perpendicular to the axis direction of the cone lower retainer 23. The outlet end of the air inlet pipe 33 is connected to the large-diameter section hole, and the inlet end is connected to a compressed air source (not shown in the figure) for forming a jet airflow for yarn guiding in the yarn passage 18 of the yarn guiding tube 17. The outer periphery of the part of the cone lower retainer 23 located downstream of the air inlet pipe 33 is provided with an external thread, which is matched with the internal thread of the adjusting knob 26. The adjusting knob 26 includes a small-diameter section upstream and a large-diameter section downstream. A circular groove is provided on the small-diameter section and an elastic retaining ring 36 is installed in it. The adjusting knob 26 is installed in the small-diameter section hole of the exhaust hood bottom cover 24 through the elastic retaining ring 36 and the dimensions of the large-diameter section. Therefore, by rotating the adjusting knob 26, the axial positions of the cone lower retainer 23 together with the yarn guiding cone 13, the yarn guiding tube 17, and the cone upper retainer 22 can be adjusted. In this embodiment, the intersection line of the first frustum-shaped hole 11 and the second frustum-shaped hole 12 of the vortex tube 7 is located 0.37 mm downstream of the intersection line of the first cone section 15 and the second cone section 16 of the yarn guiding cone 13.

[0028] The upper exhaust hood 20 cooperates with the air chamber hood 19 to fix the fiber guiding assembly 6 and the eddy current tube 7, and the exhaust hood 20 extends outward to form an upper bracket 21. Inside the bottom cover 24 of the exhaust hood, there is a through hole with a large-diameter section hole slightly smaller than the outer diameter value of the exhaust hood 20, a medium-diameter section hole, and a small-diameter section hole with the same diameter as the small-diameter section of the adjusting knob 26. The large-diameter section hole and the upper exhaust hood 20 are fitted by interference fit. Near the periphery, there are four lower exhaust slot holes 35 and four guiding holes 34 that are symmetrically distributed respectively. The cross-sectional shape and size of the lower exhaust slot holes 35 are equal to those of the middle exhaust slot holes and their positions correspond to each other. The guiding holes 34 correspond to the positions of the middle bolt mounting holes 32. The bottom cover 24 of the exhaust hood extends outward to form a lower bracket 25. The ends of the upper bracket 21 and the lower bracket 25 away from the exhaust hood 20 and the bottom cover 24 of the exhaust hood are Figure 1 hinged to a fixed shaft (not shown in the figure) to facilitate the separation and closing of the upper exhaust hood 20 and the bottom cover 24 of the exhaust hood. A hole 43 is opened on the side wall of the bottom cover 24 of the exhaust hood for the intake pipe 33 to pass through.

[0029] To ensure good gas tightness of the spinning device, a first O-ring 39 is provided between the fiber guiding assembly 6 and the air chamber hood 19, a second O-ring 40 is provided between the eddy current tube 7 and the air chamber hood 19 and the exhaust hood 20, a third O-ring 44 is provided between the yarn guiding tube 17 and the yarn guiding cone 13, and a fourth O-ring 45 is provided between the yarn guiding tube 17 and the cone lower holding member 23.

[0030] Using the air-jet vortex spinning nozzle device of this embodiment, the total air pressure in the air chamber 28 can be set to a relatively low level, such as 0.4 MPa to 0.5 MPa. Spinning at such a relatively low air pressure can keep the yarn quality at a relatively high level, such as reaching the yarn quality level of second-class products, first-class products or even excellent products. At the same time, it can significantly reduce the air consumption required during the yarn twisting process. For example, the air consumption can be reduced by 40% to 65% compared with the prior art, which is beneficial to the energy saving, consumption reduction, high efficiency and high quality production of the air-jet vortex spinning machine.

Claims

1. A jet vortex spinning nozzle device with low air consumption, characterized in that: It includes an air chamber cover, an exhaust hood, and a bottom cover of the exhaust hood installed in sequence from upstream to downstream. Inside the upper parts of the air chamber cover and the exhaust hood, a fiber guiding assembly and a vortex tube are successively arranged from upstream to downstream. The annular area surrounded by the air chamber cover, the fiber guiding assembly, and the vortex tube forms an air chamber. Inside the lower part of the exhaust hood, a cone upper retainer is provided. The cone upper retainer connects the yarn guiding cone and the cone lower retainer into a whole. Inside the yarn guiding cone and the cone lower retainer, a yarn guiding tube is provided. On the yarn guiding cone, a first cone section and a second cone section are provided. The upstream parts of the first cone section and the second cone section extend into the vortex tube. Inside the vortex tube, a first cylindrical hole, a second cylindrical hole, a first frustum-shaped hole, and a second frustum-shaped hole are successively arranged from upstream to downstream. A first annular vortex chamber is formed between the vortex tube and the first cone section of the yarn guiding cone, and a second annular vortex chamber is formed between the vortex tube and the second cone section of the yarn guiding cone. The first annular vortex chamber is communicated with the second annular vortex chamber. The vortex tube is provided with a plurality of air flow injection holes communicated with the air chamber and the first annular vortex chamber. The air flow injection holes are oriented towards the first annular vortex chamber and inclined in the downstream direction. The outlet of the air flow injection hole is located on the step between the second cylindrical hole and the first frustum-shaped hole. The axial length of the first frustum-shaped hole is 7.3 mm to 8.1 mm; the intersection line of the first frustum-shaped hole and the second frustum-shaped hole of the vortex tube is located downstream of the intersection line of the first cone section and the second cone section of the yarn guiding cone; the diameter at the entrance of the first frustum-shaped hole is 4.6 mm to 4.9 mm; the diameter of the air flow injection hole is 0.4 mm to 0.5 mm; the number of the air flow injection holes is 3 to 5; the length of the common perpendicular line segment between the axis of the air flow injection hole and the axis of the vortex tube is 36% to 47% of the diameter at the entrance of the first frustum-shaped hole.

2. The jet vortex spinning nozzle device with low air consumption according to claim 1, characterized in that: The included angle between the axis of the air flow injection hole and the axis of the vortex tube is 60°.

3. The jet vortex spinning nozzle device with low air consumption according to claim 1, characterized in that: The diameter of the first cylindrical hole is larger than that of the second cylindrical hole. The diameter of the second cylindrical hole is smaller than the diameter at the entrance of the first frustum-shaped hole. The diameter at the outlet of the first frustum-shaped hole is equal to the diameter at the entrance of the second frustum-shaped hole. The diameter at the entrance of the second frustum-shaped hole is smaller than the diameter at the outlet of the second frustum-shaped hole. The first cylindrical hole, the second cylindrical hole, the first frustum-shaped hole, and the second frustum-shaped hole are coaxially arranged. The cone angle of the first frustum-shaped hole is adapted to the cone angle of the first cone section of the yarn guiding cone, and the cone angle of the second frustum-shaped hole is adapted to the cone angle of the second cone section of the yarn guiding cone.

4. The air jet vortex spinning nozzle device with low air consumption according to claim 1, characterized in that: The fiber guiding assembly includes a guiding body, a guiding body housing, and guiding needles. The guiding body is provided with a spiral surface and guiding needles installed at the downstream end of the guiding body. The spiral direction of the spiral surface is the same as the spiral direction of the high-speed rotating air flow in the vortex tube.

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