Vortex splice nozzle

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of textile technology, in particular to a vortex splicing nozzle.BACKGROUND

[0002] Textile industry is a traditional pillar industry and an important livelihood industry in economy in China, and is also an industry with obvious international competitive advantages. With the rapid development of science and technology, the spinning speed is significantly improved, so the requirements for yarn properties are further improved, and the quality of joints is one of the important factors affecting yarn properties.

[0003] Compressed air type splicer (also known as pneumatic splicer) is a device that uses compressed air as power to achieve jointless connection of yarns. The compressed air type splicer includes a splicing nozzle, which has a splicing chamber, and an inner wall of the splicing chamber is provided with gas inlet holes. When in use, yarn ends of two yarns are put into the splicing chamber, high-pressure airflow enters the splicing chamber through the gas inlet holes to form rotational airflow in the splicing chamber, thus driving the yarn ends of the two yarns to be spliced.

[0004] European Patent Application NO. EP 4 071 097 A1 discloses a yarn splicing nozzle includes a nozzle body, an upstream splicing chamber formed in the nozzle body and having a planar flat wall at a part of an inner wall, a downstream splicing chamber formed in the nozzle body, communicatively connected to the upstream splicing chamber, and having a planar flat wall at a part of an inner wall, a first upstream injection hole and a second upstream injection hole formed in the nozzle body and configured to inject compressed air toward the upstream splicing chamber, and a first downstream injection hole and a second downstream injection hole formed in the nozzle body and configured to inject compressed air toward the downstream splicing chamber. The first upstream injection hole injects compressed air along the flat wall of the upstream splicing chamber. The first downstream injection hole injects compressed air along the flat wall of the downstream splicing chamber.

[0005] European Patent Application NO. EP 2 666 741 A2 discloses a yarn splicing device comprising a twisting nozzle adapted to twist yarn ends; and a twisting airflow supplying mechanism adapted to supply compressed air to generate a twisting airflow with respect to the twisting nozzle and to switch a whirling direction of the twisting airflow and / or to switch a generating region of the twisting airflow, wherein the twisting airflow for twisting the yarn ends is generated in the whirling direction and / or the generating region in accordance with a twisting condition of the yarn to be performed with a yarn splicing operation by a control on the twisting airflow supplying mechanism.

[0006] In the prior art, the friction between the splicing chamber and yarns therein is great, and the airflow rotating around the yarns is not easy to pass through the gap between the yarns and the splicing chamber, reducing the speed of the airflow rotating around the yarns, resulting in lower twist of the yarns when the yarns are spliced, and further reduction of the tensile fracture strength of a portion at the position where the yarns are spliced.SUMMARY

[0007] An objective of the present invention is to provide a vortex splicing nozzle to reduce the friction between yarns and a splicing chamber, thus increasing the twist of a portion at a position where yarns are spliced, and further improving the tensile fracture strength of the portion at the position where yarns are spliced and the overall aesthetics of the yarns.

[0008] To achieve the objective above, the present invention provides the following technical solution:

[0009] A vortex splicing nozzle, as described in claim 1, that includes a splicing chamber. The splicing chamber includes two gripping chambers communicated with each other, cross sections of the two gripping chambers are partially overlapped, and each of the two gripping chambers is provided with gas inlet holes, and curved surfaces opposite to the gas inlet holes; the curved surfaces are configured for guiding gases introduced from the gas inlet holes as one way rotating rotational flows, and rotating directions of rotational flows in the two gripping chambers are opposite; and a side wall of the gripping chamber is provided with a first gas inlet hole and a second gas inlet hole, and the first gas inlet hole and the second gas inlet hole are configured for forming the rotational flows with a same rotating direction.

[0010] Cross sectional area of the first gas inlet hole is less than that of the second gas inlet hole, so as to form a dragging airflow layer with a higher flow velocity and a pushing airflow layer with a lower flow velocity, and the dragging airflow layer is located at one side, close to the gripping chamber, of the pushing airflow layer.

[0011] Preferably, the curved surfaces includes a first curved surface and a second curved surface; the first curved surface directly faces an outlet of the first gas inlet hole, the second curved surface directly faces an outlet of the second gas inlet hole, a bottom of the first curved surface is connected to a bottom of the second curved surface via a plane, the outlet of the first gas inlet hole is located on the plane, and an opening is provided between a top of the first curved surface and a top of the second curved surface.

[0012] Preferably, a V-shaped groove and a vertical groove for yarns to pass through are provided above the two gripping chambers, a bottom of the V-shaped groove is connected to a top of the vertical groove, and a bottom of the vertical groove is connected to the opening and deviated to one side of one of the two gripping chambers.

[0013] Preferably, the vortex splicing nozzle further includes a core, and a housing. The two gripping chambers are located in the core, the housing is sleeved outside the core to form a gas supply chamber between the housing and the core, and the gas supply chamber is simultaneously communicated with the gas inlet holes.

[0014] Preferably, each of the first gas inlet hole and the second gas inlet hole is a straight hole.

[0015] Preferably, the first gas inlet hole and the second gas inlet hole are parallel to and opposite to each other.

[0016] Preferably, a top of the housing is provided with a square groove, and a bottom of the housing is provided with a cylindrical groove, an axis of the cylindrical groove extends through a central face of the square groove and is perpendicular to a bottom of the square groove, the cylindrical groove extends to groove walls, on both sides, of the square groove, and the core is embedded into the square groove.

[0017] An inlet of the second gas inlet hole of one of the two gripping chambers directly faces the cylindrical groove on one of the groove walls, at one side, of the square groove, and an inlet of the second gas inlet hole of an other of the two gripping chambers directly faces the cylindrical grooves on an other of the groove walls, at an other side, of the square groove.

[0018] An inlet of the first gas inlet hole is located on a bottom surface of the core, and directly faces the cylindrical groove at the bottom of the housing.

[0019] Preferably, the vortex splicing nozzle further includes a gas supply pipeline fixedly connected to the housing, the gas supply pipeline is communicated with the gas supply chamber.

[0020] Compared with the prior art, the present invention obtains the following beneficial technical effects: As the side wall of the gripping chamber is provided with the first gas inlet hole and the second gas inlet hole, the first gas inlet hole and the second gas inlet hole of the same gripping chamber are used for forming rotational flows with the same rotating direction. As the cross-sectional area of the first gas inlet hole is less than that of the second gas inlet hole, the thickness of the rotational flow generated by the first gas inlet hole is smaller than that generated by the second gas inlet hole, thus accelerating the flow velocity of the airflow near an inner wall of the gripping chamber. Therefore, the airflow is divided into a dragging airflow layer with relatively high flow velocity and a pushing airflow layer with relatively low flow velocity, and the dragging airflow layer is located at one side, close to the gripping chamber, of the pushing airflow layer. The dragging airflow layer can increase a gap between the yarn and the gripping chamber, and increase the rotating speed of the airflow rotating around the yarn, thus increasing the twist of a portion at the position where the yarns are spliced and further improving the tensile fracture strength of the portion at the position where the yarns are spliced. Furthermore, due to the increase of the twist of the portion at the position where the yarns are spliced, the portion at the position where the yarns are spliced is thinner, and the overall aesthetics of the yarn is improved.BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To describe the technical solutions of the embodiments of the present disclosure or in the prior art more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and those of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts. FIG. 1 is a perspective view of a vortex splicing nozzle according to an embodiment of the present disclosure; FIG. 2 is a front schematic diagram of the vortex splicing nozzle according to an embodiment of the present disclosure; FIG. 3 is a rear schematic diagram of the vortex splicing nozzle according to an embodiment of the present disclosure; FIG. 4 is a perspective view of a core; FIG. 5 is a front schematic diagram of the core; FIG. 6 is a right schematic diagram of the core; FIG. 7 is a schematic diagram of a housing; and FIG. 8 is an airflow simulation diagram of a vortex splicing nozzle near a splicing chamber according to an embodiment of the present disclosure.

[0022] Reference numerals: 1 first gripping chamber; 2 second gripping chamber; 3 first gas inlet hole; 4 second gas inlet hole; 5 first curved surface; 6 second curved surface; 7 plane; 8 V-shaped groove; 9 vertical groove; 10 square groove; 11 cylindrical groove; 12 first portion; 13 second portion; 14 core; 15 housing; 16 gas supply pipeline; 17 yarn.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0024] An objective of the embodiments is to provide a vortex splicing nozzle to reduce the friction between yarns and a splicing chamber, thus increasing the twist of a portion at a position where the yarns are spliced, and further improving the tensile fracture strength of the portion at the position where the yarns are spliced and the overall aesthetics of the yarns.

[0025] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly, the present disclosure is further described in detail below with reference to the embodiments. In this embodiment, the splicing of two yarns are taken as an example for illustration. In actual use, the number of yarns may be more than three.

[0026] Referring to FIGs. 1 - 8, a vortex splicing nozzle provided by this embodiment includes a splicing chamber. The splicing chamber includes two gripping chambers communicated with each other, the two gripping chambers includes a first gripping chamber 1 and a second gripping chamber 2, and the cross sections of the two gripping chambers are partially overlapped. Each gripping chamber is provided with gas inlet holes and curved surfaces opposite to the gas inlet holes, the curved surface is configured for guiding a gas introduced from the gas inlet hole as a one way rotating rotational flow, and rotating directions of rotational flows in the two gripping chambers are opposite.

[0027] A side wall of the gripping chamber is provided with a first gas inlet hole 3 and a second gas inlet hole 4, and the first gas inlet hole 3 and the second gas inlet hole 4 of the same gripping chamber are configured for forming rotational flows with the same rotating direction. The cross-sectional area of the first gas inlet hole 3 is less than that of the second gas inlet hole 4, so as to form a dragging airflow layer with higher flow velocity and a pushing airflow layer with lower flow velocity, and the dragging airflow layer is located at one side, close to the gripping chamber, of the pushing airflow layer.

[0028] The operation principle of the vortex splicing nozzle in this embodiment is as follows:

[0029] The two yarns 17 both penetrate through the first gripping chamber 1 and the second gripping chamber 2, and the two yarns 17 are promoted to approach each other due to the cross sections of the two gripping chambers are partially overlapped. When airflows are introduced into the gripping chamber through the gas inlet holes, the two yarns 17 are spliced. As the cross-sectional area of the first gas inlet hole 3 is less than that of the second gas inlet hole 4, a thickness of the rotational flow generated by the first gas inlet hole 3 is less than that generated by the second gas inlet hole 4, thus accelerating the flow velocity of the airflow near the inner wall of the gripping chamber, dividing the airflow into a dragging airflow layer and a pushing airflow layer. The dragging airflow layer can increase a gap between the yarns 17 and the gripping chamber, so that the friction between the yarns 17 and the gripping chamber is reduced, and the rotating speed of the airflow rotating around the yarns 17 is improved, thus increasing the twist of a portion at the position where the yarns are spliced, and further improving the tensile fracture strength of the portion at the position where the yarns are spliced. Furthermore, due to the increase of the twist of the portion at the position where the yarns 17 are spliced, the portion at the position where the yarns 17 are spliced is thinner, thus improving the overall aesthetics of the yarns 17.

[0030] As a possible example, in this embodiment, the curved surfaces of the gripping chamber includes a first curved surface 5, and a second curved surface 6. The first curved surface 5 directly faces an outlet of the first gas inlet hole 3, the second curved surface 6 directly faces an outlet of the second gas inlet hole 4, the bottom of the first curved surface 5 is connected to the bottom of the second curved surface 6 via a plane 7, the outlet of the first gas inlet hole 3 is located on the plane 7, and an opening is provided between the top of the first curved surface 5 and the top of the second curved surface 6. Specifically, in this embodiment, the first curved surface 5 is preferably a cylindrical surface. According to different actual needs, those of ordinary skill in the art may also choose gripping chambers in other shapes, for example, the plane 7 between the first curved surface 5 and the second curved surface 6 can be replaced with a transition curved surface.

[0031] As a possible example, in this embodiment, a V-shaped groove 8 and a vertical groove 9 for the yarns 17 to pass through is provided above the gripping chambers, the bottom of the V-shaped groove 8 is connected to the top of the vertical groove 9, and the bottom of the vertical groove 9 is connected to the opening and deviated to one side of the gripping chamber. The side of an opening of the V-shaped groove 8 gradually decreases from top to bottom, thus guiding the yarns 17 and making the yarns 17 enter the gripping chambers easier.

[0032] As a possible example, in this embodiment, the vortex splicing nozzle further includes a core 14, and a housing 15. The gripping chambers are located in the core 14, the housing 15 is sleeved outside the core 14 to form a gas supply chamber between the housing 15 and the core 14. The gas supply chamber is communicated with multiple gas inlet holes. The gas supply mode in this embodiment, on the one hand, guarantees that the pressure in the first gas inlet hole 3 is consistent with that in the second gas inlet hole 4 and on the other hand, thus reducing the use of the pipeline and the joint, simplifying the structure and reducing the cost.

[0033] As a possible example, in this embodiment, the first gas inlet hole 3 and the second gas inlet hole 4 are both straight holes, which can be formed by drilling, thus reducing the processing cost. When the first gas inlet hole 3 and the second gas inlet hole 4 are curved holes, the core 14 may be formed by casting, injection molding and other processing modes. The straight hole here is preferably a round hole, those skilled in the art may choose straight holes with other cross section shapes according to different actual needs.

[0034] As a possible example, in this embodiment, the first gas inlet hole 3 and the second gas inlet hole 4 are parallel to and opposite to each other. That is, compared with the directly facing position relationship, the first gas inlet hole 3 and the second gas inlet hole 4 are deviated from each other. According to different actual needs, those skilled in the art may also choose to form an included angle between the first gas inlet hole 3 and the second gas inlet hole 4, such as an included angle of 5 degrees or 10 degrees.

[0035] As a possible example, in this embodiment, the top of the housing 15 is provided with a square groove 10, the bottom of the housing 15 is provided with a cylindrical groove 11, and the bottom of the core 14 is embedded into the square groove 10. An axis of the cylindrical groove 11 extends through a central face of the square groove 10 and is perpendicular to the bottom of the square groove 10, and the cylindrical groove 11 extends to groove walls on both sides of the square groove 10. Portions of the cylindrical groove 11 corresponding to the groove walls on both sides of the square groove 10 are a first portion12 and a second portion 13. An inlet of the second gas inlet hole 4 of the first gripping chamber 1 directly faces the first portion 12, and an inlet of the second gas inlet hole 4 of the second gripping chamber 2 directly faces the second portion 13. An inlet of the first gas inlet hole 3 is located on a bottom surface of the core 14 and directly faces the cylindrical groove 11 at the bottom of the housing 15. According to different actual needs, those of ordinary skill in the art may also choose housings 15 and cores 14 in other shapes.

[0036] As a possible example, in this embodiment, the vortex splicing nozzle further includes a gas supply pipeline 16 fixedly communicated with the housing 15, a first end of the gas supply pipeline 16 is communicated with the gas supply chamber, and a second end of the gas supply pipeline 16 is communicated with a high-pressure gas source, so as to supply gas into the gas supply chamber.

[0037] Specific examples are used herein for illustration of the principles and implementation methods of the present invention. The description of the embodiments is merely used to help illustrate the method and its core principles of the present disclosure, the scope of the invention being defined by the appended claims.

Claims

1. A vortex splicing nozzle, comprising a splicing chamber, wherein the splicing chamber comprises two gripping chambers (1, 2) communicated with each other, cross sections of the two gripping chambers (1, 2) are partially overlapped, and each of the two gripping chambers (1, 2) is provided with gas inlet holes and curved surfaces opposite to the gas inlet holes; the curved surfaces are configured for guiding gases introduced from the gas inlet holes as one way rotating rotational flows, and rotating directions of rotational flows in the two gripping chambers (1, 2) are opposite; and a side wall of the gripping chamber (1, 2) is provided with a first gas inlet hole (3) and a second gas inlet hole (4), and the first gas inlet hole (3) and the second gas inlet hole (4) are configured for forming the rotational flows with a same rotating direction, the vortex splicing nozzle being characterized in that cross sectional area of the first gas inlet hole (3) is less than that of the second gas inlet hole (4), so as to form a dragging airflow layer with a higher flow velocity and a pushing airflow layer with a lower flow velocity, and the dragging airflow layer is located at one side, close to the gripping chamber (1, 2), of the pushing airflow layer.

2. The vortex splicing nozzle according to claim 1, wherein the curved surfaces comprises a first curved surface (5) and a second curved surface (6); the first curved surface (5) directly faces an outlet of the first gas inlet hole (3), the second curved surface (6) directly faces an outlet of the second gas inlet hole (4), a bottom of the first curved surface (5) is connected to a bottom of the second curved surface (6) via a plane (7), the outlet of the first gas inlet hole (3) is located on the plane (7), and an opening is provided between a top of the first curved surface (5) and a top of the second curved surface (6).

3. The vortex splicing nozzle according to claim 2, wherein a V-shaped groove (8) and a vertical groove (9) for yarns (17) to pass through are provided above the two gripping chambers (1, 2), a bottom of the V-shaped groove (8) is connected to a top of the vertical groove (9), and a bottom of the vertical groove (9) is connected to the opening and deviated to one side of one of the two gripping chambers (1, 2).

4. The vortex splicing nozzle according to claim 2, further comprising a core (14), and a housing (15), wherein the two gripping chambers (1, 2) are located in the core (14), the housing (15) is sleeved outside the core (14) to form a gas supply chamber between the housing (15) and the core (14), and the gas supply chamber is simultaneously communicated with the gas inlet holes.

5. The vortex splicing nozzle according to claim 4, wherein each of the first gas inlet hole (3) and the second gas inlet hole (4) is a straight hole.

6. The vortex splicing nozzle according to claim 5, wherein the first gas inlet hole (3) and the second gas inlet hole (4) are parallel to and opposite to each other.

7. The vortex splicing nozzle according to claim 6, wherein a top of the housing (15) is provided with a square groove (10), and a bottom of the housing (15) is provided with a cylindrical groove (11), an axis of the cylindrical groove (11) extends through a central face of the square groove (10) and is perpendicular to a bottom of the square groove (10), the cylindrical groove (11) extends to groove walls, on both sides, of the square groove (10), and the core (14) is embedded into the square groove (10); an inlet of the second gas inlet hole (4) of one of the two gripping chambers (1, 2) directly faces the cylindrical groove (11) on one of the groove walls, at one side, of the square groove (10), and an inlet of the second gas inlet hole (4) of an other of the two gripping chambers (1, 2) directly faces the cylindrical grooves (11) on an other of the groove walls, at an other side, of the square groove (10); and an inlet of the first gas inlet hole (3) is located on a bottom surface of the core (14), and directly faces the cylindrical groove (11) at the bottom of the housing (15).

8. The vortex splicing nozzle according to claim 4, further comprising a gas supply pipeline (16) fixedly connected to the housing (15), wherein the gas supply pipeline (16) is communicated with the gas supply chamber.