Nozzle for air jet loom

Abstract

The utility model relates to a nozzle for an air jet loom, which comprises a yarn guide tube, a nozzle shell, a sealing ring, an air inlet pipe, a first flow deflector and a second flow deflector, the nozzle shell is sleeved outside the yarn guide tube, an annular air chamber is formed between the yarn guide tube and the nozzle shell, one end of the yarn guide tube is fixed with the nozzle shell in a sealing mode through the sealing ring, and the other end of the nozzle shell is fixed with the air inlet pipe. A plurality of first flow deflectors are arranged on the outer side face of the middle of the yarn guide pipe and spirally wound on the yarn guide pipe, a plurality of second flow deflectors are arranged on the outer side face of the end, away from the sealing ring, of the yarn guide pipe, and the second flow deflectors are connected with the first flow deflectors and are parallel to the central axis of the yarn guide pipe. An air inlet pipe is arranged on the side face of the end, close to the sealing ring, of the nozzle shell, and the air inlet pipe is connected with the nozzle shell in the tangential direction of the main body section of the nozzle shell.

Description

Technical Field

[0001] The utility model relates to the technical field of air jet looms, in particular to a nozzle used for air jet looms. Background Art

[0002] The air jet loom is a shuttleless loom that uses a jet airflow to pull the weft yarn through the shed. The air jet weft insertion uses air as the weft insertion medium, and the ejected compressed airflow produces friction traction on the weft yarn to pull the weft yarn through the shed. The purpose of weft insertion is achieved through the jet generated by the air jet. It is characterized by high speed, high tension, and small shed. It has relatively high requirements for raw yarn and semi-finished products. The nozzle is one of the important components of the air jet loom.

[0003] Publication No.: CN216193081U discloses a nozzle for a jet loom. In the above application, the Bernoulli principle is used to set an inner tube inside the nozzle housing. In addition to the compressed airflow connected to the vent pipe, there is also air sucked in from the rear end of the inner tube. Under the condition of unchanged air consumption, the wind force of the nozzle is increased; and the inner tube is a conical structure, which increases the air flow rate blown out from the second air outlet, so that the wind force and wind speed of the nozzle are significantly increased.

[0004] However, during actual use of the above-mentioned equipment, when the gas enters the annular air chamber through the ventilation pipe, the air flow directly flows into the annular air chamber, resulting in more air flow at the bottom and a faster flow rate. When the gas reaches the top of the annular air chamber, the stroke will increase, resulting in power loss, making the air pressure and flow rate of the air above the weft yarn smaller than that below, resulting in uneven delivery. Utility Model Content

[0005] In order to solve the above technical deficiencies, the utility model provides a nozzle for an air jet loom, which can make the air flow blow out more evenly.

[0006] The utility model discloses a nozzle for an air jet loom, comprising a yarn guide tube, a nozzle housing, a sealing ring, an air inlet pipe, a first guide plate and a second guide plate, the nozzle housing is a three-section structure, which is a main section, a converging section and a rectifying section in sequence, the main section is a cylindrical structure, the converging section is a conical structure, the rectifying section is a cylindrical structure, the inner diameter of the rectifying section is smaller than the inner diameter of the main section, one end of the yarn guide tube is set in a conical shape, the nozzle housing is sleeved outside the yarn guide tube, and the conical part of the yarn guide tube corresponds to the converging section of the nozzle housing, the yarn guide tube and the nozzle housing are An annular air chamber is formed in between, one end of the yarn guide tube is sealed and fixed to the nozzle housing by a sealing ring, a plurality of No. 1 guide vanes are arranged on the outer side of the middle part of the yarn guide tube, the No. 1 guide vanes are spirally wound on the yarn guide tube, a plurality of No. 2 guide vanes are arranged on the outer side of the end of the yarn guide tube away from the sealing ring, the No. 2 guide vanes are connected with the No. 1 guide vanes and the No. 2 guide vanes are parallel to the central axis of the yarn guide tube, an air inlet pipe is arranged on the side surface of the end of the nozzle housing close to the sealing ring, and the air inlet pipe is connected to the nozzle housing along the tangent direction of the main section of the nozzle housing.

[0007] The principle of the above technical solution is that the air inlet pipe is connected to a high-pressure air source, and the high-pressure gas enters the annular air chamber between the nozzle housing and the yarn guide tube through the air inlet pipe and forms an airflow that rotates rapidly around the yarn guide tube. During the rotation, the air flow drives the rest of the air in the annular air chamber to rotate rapidly forward and evenly enters between the No. 1 guide vanes. It should be noted here that the air inlet pipe should be arranged so that the direction of rotation of the air flow is the same as the winding direction of the No. 1 guide vane. The rotating airflow comes out from between the No. 1 guide vanes and enters between the No. 2 guide vanes. Since the No. 2 guide vane is parallel to the central axis of the yarn guide tube, the airflow can correct the direction of the airflow between the No. 2 guide vanes and enter the confluence section, and finally blown out from the straightening section, and the weft yarn installed in the yarn guide tube is blown out with the airflow.

[0008] In order to make the structure more stable, the outer side of the No. 1 guide plate and the outer side of the No. 2 guide plate are pressed against the inner wall of the nozzle housing, and the No. 1 guide plate and the No. 2 guide plate play a supporting role, making the yarn guide tube and the nozzle housing more stable.

[0009] The nozzle for an air jet loom obtained by the utility model has the beneficial effect that, through the air inlet pipe connected with the nozzle shell along the tangent direction of the main section of the nozzle shell, the air in the annular air chamber rotates forward quickly and evenly enters between the No. 1 guide vanes, and the direction of the airflow is corrected by the No. 2 guide vanes, so that the airflow is blown out more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of embodiment 1 of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of Example 1 of the utility model. DETAILED DESCRIPTION

[0012] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0013] Embodiment 1:

[0014] like Figure 1 , 2 As shown, the utility model discloses a nozzle for an air jet loom, comprising a yarn guide tube 4, a nozzle housing 1, a sealing ring 3, an air inlet pipe 2, a first guide plate 5 and a second guide plate 6. The nozzle housing 1 is a three-section structure, which is a main section, a confluence section and a rectification section in sequence. The main section is a cylindrical structure, the confluence section is a conical structure, the rectification section is a cylindrical structure, the inner diameter of the rectification section is smaller than the inner diameter of the main section, one end of the yarn guide tube 4 is set to be conical, the nozzle housing 1 is sleeved outside the yarn guide tube 4 and the conical part of the yarn guide tube 4 corresponds to the confluence section of the nozzle housing 1, and the yarn guide tube 4 and the nozzle housing 1 are connected. An annular air chamber is formed, one end of the yarn guide tube 4 is sealed and fixed to the nozzle housing 1 by a sealing ring 3, a plurality of No. 1 guide vanes 5 are arranged on the outer side of the middle part of the yarn guide tube 4, the No. 1 guide vanes 5 are spirally wound on the yarn guide tube 4, a plurality of No. 2 guide vanes 6 are arranged on the outer side of the end of the yarn guide tube 4 away from the sealing ring 3, the No. 2 guide vanes 6 are connected to the No. 1 guide vanes 5 and the No. 2 guide vanes 6 are parallel to the central axis of the yarn guide tube 4, an air inlet pipe 2 is arranged on the side surface of the end of the nozzle housing 1 close to the sealing ring 3, and the air inlet pipe 2 is connected to the nozzle housing 1 along the tangent direction of the main section of the nozzle housing 1.

[0015] The principle of the above technical solution is that the air inlet pipe 2 is connected to a high-pressure air source, and the high-pressure gas enters the annular air chamber between the nozzle housing 1 and the yarn guide tube 4 through the air inlet pipe 2 and forms an airflow that rotates rapidly around the yarn guide tube 4. During the rotation, the airflow drives the rest of the air in the annular air chamber to rotate rapidly forward and evenly enters between the No. 1 guide vanes 5. It should be noted here that the air inlet pipe 2 should be arranged so that the direction of rotation of the airflow is the same as the winding direction of the No. 1 guide vane 5. The rotating airflow comes out from between the No. 1 guide vanes 5 and enters between the No. 2 guide vanes 6. Since the No. 2 guide vane 6 is parallel to the central axis of the yarn guide tube 4, the airflow can guide the direction of the airflow between the No. 2 guide vanes 6 and enter the confluence section, and finally blown out from the straightening section, and the weft yarn installed in the yarn guide tube 4 is blown out with the airflow.

[0016] In order to make the structure more stable, the outer side of the No. 1 guide vane 5 and the outer side of the No. 2 guide vane 6 are pressed against the inner wall of the nozzle housing 1, and the No. 1 guide vane 5 and the No. 2 guide vane 6 play a supporting role, making the yarn guide tube 4 and the nozzle housing 1 more stable.

[0017] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0018] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be an interactive relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0020] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simplified modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A nozzle for an air jet loom, characterized in that: The invention comprises a yarn guide tube (4), a nozzle housing (1), a sealing ring (3), an air inlet pipe (2), a first guide plate (5) and a second guide plate (6); the nozzle housing (1) is a three-section structure, which is a main section, a converging section and a rectifying section in sequence; the main section is a cylindrical structure, the converging section is a conical structure, the rectifying section is a cylindrical structure, the inner diameter of the rectifying section is smaller than the inner diameter of the main section; one end of the yarn guide tube (4) is arranged in a conical shape; the nozzle housing (1) is sleeved outside the yarn guide tube (4) and the conical part of the yarn guide tube (4) corresponds to the converging section of the nozzle housing (1); an annular air chamber is formed between the yarn guide tube (4) and the nozzle housing (1); one end of the yarn guide tube (4) is connected to the nozzle housing (1) and the conical part of the yarn guide tube (4) corresponds to the converging section of the nozzle housing (1); an annular air chamber is formed between the yarn guide tube (4) and the nozzle housing (1); one end of the yarn guide tube (4) is connected to the nozzle housing (1) and the conical part of the yarn guide tube (4) corresponds to the converging section of the nozzle housing (1); The nozzle housing (1) is sealed and fixed by a sealing ring (3); a plurality of No. 1 guide vanes (5) are arranged on the outer side surface of the middle part of the yarn guide tube (4); the No. 1 guide vanes (5) are spirally wound on the yarn guide tube (4); a plurality of No. 2 guide vanes (6) are arranged on the outer side surface of the end of the yarn guide tube (4) away from the sealing ring (3); the No. 2 guide vanes (6) are connected to the No. 1 guide vanes (5) and the No. 2 guide vanes (6) are parallel to the central axis of the yarn guide tube (4); an air inlet pipe (2) is arranged on the side surface of the end of the nozzle housing (1) close to the sealing ring (3); the air inlet pipe (2) is connected to the nozzle housing (1) along the tangent direction of the main section of the nozzle housing (1).

2. A nozzle for an air jet loom according to claim 1, characterized in that: The outer side of the first guide vane (5) and the outer side of the second guide vane (6) are pressed against the inner wall of the nozzle housing (1).

Images