An oven nozzle of a tentering machine

Abstract

An oven nozzle of a tentering setting machine comprises a plurality of nozzle units uniformly distributed, the nozzle unit is a polygonal tubular structure, one end of the nozzle unit is an air inlet opening end, the other end is a closed end, the lumen of the nozzle unit is designed in a tapered shape from the air inlet opening end to the closed end, a connecting plate is fixedly connected between adjacent nozzle units, a nozzle slit extending along the length direction of the nozzle unit is arranged on the bottom wall of the lumen of each nozzle unit, and an air distribution assembly for uniformly guiding the airflow to the nozzle slit is arranged above each nozzle slit. Through the synergistic effect of the tapered lumen and the air distribution assembly, the hot air can be sprayed out from the continuous nozzle slit with uniform air pressure, and the uniformity of the fabric setting flatness and effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of tenter frame technology, and in particular to an oven nozzle for a tenter frame. Background Technology

[0002] Two nozzles are distributed vertically in the oven of the tenter frame. Hot air is sprayed out and applied evenly to the fabric surface to achieve fabric setting, drying and smoothness optimization.

[0003] In the prior art, such as Chinese utility model patent with patent number CN201520531515.4, a high-tech oblique nozzle for a setting machine is disclosed, which includes an upper nozzle body and a lower nozzle body that are opposite each other. The channel formed by the upper and lower nozzle bodies is a drying channel for the fabric. Both the upper nozzle body and the lower nozzle body are composed of multiple oblique nozzles and nozzle connecting plates arranged at intervals. Each oblique nozzle includes a nozzle plate with multiple nozzle holes.

[0004] Although the nozzle dries the fabric by blowing air through multiple nozzle holes, the air outlet area is small, resulting in a high air velocity per unit area. When drying thin fabrics, the fabric is prone to irregular movement and displacement in the drying channel, which damages the flatness of the fabric during the setting process and may even form wrinkles on the fabric surface that are difficult to eliminate.

[0005] In summary, we propose an oven nozzle for a tenter frame to address the aforementioned issues. Utility Model Content

[0006] The purpose of this invention is to provide a nozzle for a tenter frame drying oven. By using this structure, the problem of thin fabrics easily drifting and wrinkling, as described in the background art, is solved.

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows: a nozzle for an oven of a tenter frame, comprising a plurality of evenly distributed nozzle units, wherein each nozzle unit is a polygonal tubular structure, one end of which is an air inlet opening and the other end is a closed end, the cavity of the nozzle unit is designed to taper from the air inlet opening to the closed end, a connecting plate is fixedly connected between adjacent nozzle units, and a nozzle slit extending along its length is provided on the bottom wall of the cavity of each nozzle unit, and an air distribution component is provided above each nozzle slit to evenly guide the airflow to the nozzle slit.

[0008] Preferably, each of the connecting plates has multiple through holes along its length.

[0009] Preferably, a first fixing plate is fixedly connected between the air inlet openings of the plurality of nozzle units, and the first fixing plate has a plurality of first through slots corresponding to the air inlet openings of the nozzle units, and a second fixing plate is fixedly connected between the air inlet closed ends of the plurality of nozzle units.

[0010] Preferably, the nozzle unit includes a cover plate, a sealing plate is fixedly connected to the bottom of one end of the cover plate, the height of the end of the cover plate away from the sealing plate is higher than the height of the end of the cover plate fixedly connected to the sealing plate, side plates are fixedly connected to the bottom of both sides of the cover plate, the two side plates are fixedly connected to the two side walls of the sealing plate, and a base plate is integrally formed on the bottom of the two side plates that are close to each other. The two base plates are arranged opposite to each other, and the nozzle slot is located between the two base plates.

[0011] Preferably, the air distribution assembly includes a horizontal plate disposed above the nozzle slit, the width of the horizontal plate being greater than the width of the nozzle slit. An extension plate is integrally formed on the top of each of the two base plates on their adjacent sides, the top of the extension plate abutting against the horizontal plate. Multiple air distribution ports are evenly distributed along the length of the horizontal plate, the width of each air distribution port being greater than the width of the nozzle slit. An air distribution plate is integrally formed on the side of each air distribution port near the sealing plate, the air distribution plate being perpendicular to the horizontal plate and extending towards the cover plate. U-shaped grooves are integrally formed on both sides of the horizontal plate, a gap being provided between the bottom of the two grooves and the base plate. The sidewalls of the two grooves away from the horizontal plate are fixedly connected to the two side plates respectively.

[0012] Preferably, each of the sealing plates has a cleaning port, and the second fixing plate has a plurality of second through slots corresponding to the cleaning ports. A baffle is detachably installed on the side wall of the second fixing plate away from the sealing plate on the outside of each second through slot by screws.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: Achieving low-speed, uniform hot air application to the fabric surface: By replacing traditional discrete nozzle holes with continuous nozzle slots extending along the length of the nozzle unit, and utilizing the gradually narrowing cavity of the nozzle unit to form stable air pressure, combined with the structural design of the air distribution assembly, which uses a horizontal plate to intercept airflow, an air distribution port to divide airflow, and an air distribution plate to break eddies, low-speed, large-area, and uniform hot air application to the fabric surface is achieved, thereby avoiding the fluttering and wrinkling of thin fabrics.

[0014] Achieving full coverage of hot air on the fabric surface: The structure works in conjunction with the horizontal plate in the air distribution assembly to fully receive the airflow in the pipe cavity, the evenly distributed air distribution outlets to divide the airflow into multiple sub-flows, the air distribution plate to guide the airflow to flow smoothly along the pipe length, and the U-shaped groove to guide the airflow at the edge. Combined with the air outlet method of the continuous nozzle slits, it achieves full coverage of hot air on the fabric surface without dead corners, avoiding local drying and heating differences. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the nozzle unit in this utility model; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a structural schematic diagram of the nozzle unit in this utility model from another perspective.

[0016] In the diagram: 1. Nozzle unit; 11. Cover plate; 12. Sealing plate; 13. Side plate; 14. Bottom plate; 2. Connecting plate; 21. Through hole; 3. Nozzle slot; 4. Air distribution assembly; 41. Horizontal plate; 42. Extension plate; 43. Air distribution plate; 44. Tank; 5. First fixing plate; 6. Second fixing plate; 7. Baffle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0019] like Figures 1-5As shown, a tenter frame oven nozzle includes multiple evenly distributed nozzle units 1. Each nozzle unit 1 is a polygonal tubular structure, providing an independent and regular channel for the flow and distribution of hot air. One end of each nozzle unit 1 is an air inlet opening, serving as the sole inlet for external hot air into the tube cavity. The other end is a closed end, preventing airflow from directly exiting from the end and forcing the airflow to flow only towards the nozzle slit 3. The tube cavity of the nozzle unit 1 is designed to gradually narrow from the air inlet opening to the closed end. During airflow, the space contraction creates a natural pressure difference, which... To offset pressure loss along the pipe and ensure balanced air pressure within the length of the pipe, a connecting plate 2 is fixedly connected between adjacent nozzle units 1. Each nozzle unit 1 has a nozzle slit 3 extending along its length on the bottom wall of its pipe. The nozzle slit 3 can significantly increase the air outlet area and reduce the air outlet velocity per unit area. Above each nozzle slit 3, an air distribution component 4 is provided to evenly guide the airflow to the nozzle slit. The air distribution component 4 can intercept, divide, and guide the airflow in the pipe, further improving the uniformity of the airflow and ensuring that the hot air acts on the fabric with stable air pressure.

[0020] Furthermore, each of the connecting plates 2 has multiple through holes 21 along its length direction. The multiple through holes 21 can serve as outflow channels for the exhaust gas after it acts on the fabric, so that the exhaust gas in the oven can be smoothly discharged to the outside of the nozzle through the through holes 21.

[0021] Furthermore, a first fixing plate 5 is fixedly connected between the air inlet openings of the plurality of nozzle units 1. The first fixing plate 5 can integrate the air inlet openings of all nozzle units 1 into a whole, enhancing structural stability. The first fixing plate 5 has a plurality of first through slots corresponding to the air inlet openings of the nozzle units 1. A second fixing plate 6 is fixedly connected between the air inlet closed ends of the plurality of nozzle units 1. The second fixing plate 6 cooperates with the first fixing plate 5 to fix and limit the nozzle units 1 from both ends, further strengthening the overall structural stability.

[0022] Furthermore, the nozzle unit 1 includes a cover plate 11, with a sealing plate 12 fixedly connected to the bottom of one end of the cover plate 11. The height of the end of the cover plate 11 away from the sealing plate 12 is higher than the height of the end fixedly connected to the sealing plate 12. The inclined design of the cover plate 11 makes the nozzle unit 1 cavity a tapered structure, which can guide the airflow to flow smoothly towards the closed end and help form a stable pressure difference. Side plates 13 are fixedly connected to the bottom of both sides of the cover plate 11. The two side plates 13 are fixedly connected to the two side walls of the sealing plate 12 respectively. The two side plates 13, together with the cover plate 11 and the sealing plate 12, form the side profile of the cavity, providing lateral constraint for the airflow. The bottom of the two side plates 13 on the side closest to each other is integrally formed with a base plate 14. The two base plates 14 are arranged opposite to each other. The nozzle slit 3 is located between the two base plates 14. The width of the nozzle slit 3 is controlled by the relative arrangement of the two base plates 14 to ensure the uniformity of the airflow.

[0023] Furthermore, the air distribution assembly 4 includes a horizontal plate 41, which is disposed above the nozzle slit 3. The width of the horizontal plate 41 is greater than the width of the nozzle slit 3, enabling it to completely intercept the airflow within the duct cavity and prevent the airflow from directly impacting the nozzle slit 3, thus avoiding excessively high local wind speeds. An extension plate 42 is integrally formed on the top of each of the two base plates 14 on their adjacent sides. The top of the extension plate 42 abuts against the horizontal plate 41. Multiple air distribution ports are evenly distributed along the length of the horizontal plate 41. The width of each air distribution port is greater than the width of the nozzle slit 3, which can initially divide the intercepted airflow into multiple uniform sub-airflows. Each air distribution port has a distribution port integrally formed on the side near the sealing plate 12. The air distribution plate 43 is perpendicular to the horizontal plate 41 and extends towards the cover plate 11. It can block and guide the airflow towards the closed end, breaking the tendency of the airflow to form a vortex at the closed end. The horizontal plate 41 has U-shaped grooves 44 integrally formed on both sides. There is a gap between the bottom of the two grooves 44 and the bottom plate 14. The side walls of the two grooves 44 away from the horizontal plate 41 are fixedly connected to the two side plates 13 respectively. The grooves 44 can guide the edge airflow on both sides of the cavity. Through the bottom gap, the edge airflow is guided to flow orderly to the nozzle slit 3, avoiding the accumulation of airflow near the side plate 13 and causing excessive local air pressure, further ensuring the air pressure balance in each area of ​​the cavity.

[0024] Furthermore, each of the sealing plates 12 is provided with a cleaning port, and the second fixing plate 6 is provided with multiple second through slots corresponding to the cleaning ports. The cleaning ports and the second through slots cooperate with each other to form a channel leading to the inside of the nozzle unit 1 cavity, which facilitates the staff to clean the dust and impurities in the cavity through the channel. A baffle 7 is detachably installed on the side wall of the second fixing plate 6 away from the sealing plate 12 on the outside of each second through slot by screws. When the equipment is running normally, the baffle 7 can seal the cleaning port and the second through slot to prevent air leakage. When cleaning is required, the baffle 7 can be removed by unscrewing the screws, which is convenient to operate.

[0025] Working principle: Two nozzles of this application are fixed in the oven in an up-down distribution, forming a shaping and conveying channel for the fabric. The fabric is stably conveyed in the horizontal direction in the channel, and the hot air sprayed from the upper and lower nozzles acts on its front and back sides.

[0026] Hot air enters the tubular cavity of multiple nozzle units 1 from the air inlet openings of the upper and lower nozzles. Because the cavity of nozzle unit 1 is designed to gradually narrow from the air inlet opening to the closed end, a natural pressure difference is formed during airflow due to the space contraction. Simultaneously, the moderate energy consumption of the airflow along the cavity length offsets the pressure loss along the path of the airflow, ultimately ensuring that the overall pressure of the hot air ejected from the nozzle slit 3 is consistent along its length. The hot air entering nozzle unit 1 first contacts the air distribution component 4 inside the cavity. The horizontal plate 41 covers directly above the nozzle slit 3, completely intercepting and receiving all the airflow within the cavity. Multiple air distribution ports evenly distributed on the horizontal plate 41... The airflow is initially divided into multiple uniform sub-airflows to avoid the problem of concentrated local airflow caused by a single airflow directly impacting the nozzle slit 3. The air distribution plate 43 on the side of each air distribution port near the sealing plate 12 can guide the airflow towards the closed end for a secondary purpose, breaking the tendency of the airflow to form vortices at the closed end and ensuring that the airflow flows smoothly along the length of the cavity. At the same time, the U-shaped grooves 44 on both sides of the air distribution assembly are fixedly connected to the side plate 13. The gap reserved between the bottom of the U-shaped groove 44 and the bottom plate 14 can guide the edge airflow on both sides of the cavity to flow in an orderly manner, avoiding the local air pressure being too high caused by the accumulation of airflow on both sides of the nozzle unit, and further ensuring the air pressure balance in each area of ​​the cavity.

[0027] The hot air, after being evenly distributed through multiple layers by the air distribution component 4, finally acts vertically on both sides of the fabric with stable and uniform air pressure through the nozzle slot 3 between the two base plates 14, achieving the drying, shaping and flatness optimization of the fabric. The gas acting on the fabric can flow out into the oven through the through hole 21 on the connecting plate 2 between adjacent nozzle units. After being filtered for impurities by the filter screen in the oven, drawn by the fan and reheated by the heating device, it is then transported back to the air inlet of the nozzle, forming a hot air recycling.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nozzle for an oven of a tenter frame, comprising a plurality of evenly distributed nozzle units (1), wherein each nozzle unit (1) is a polygonal tubular structure, one end of each nozzle unit (1) is an air inlet opening, and the other end is a closed end, wherein the cavity of each nozzle unit (1) is tapered from the air inlet opening to the closed end, and a connecting plate (2) is fixedly connected between adjacent nozzle units (1), characterized in that: Each nozzle unit (1) has a nozzle slit (3) extending along its length on the bottom wall of its cavity, and an air distribution assembly (4) is provided above each nozzle slit (3) to uniformly guide the airflow to the nozzle slit.

2. The oven nozzle of a tenter frame as described in claim 1, characterized in that: Each of the connecting plates (2) has multiple through holes (21) along its length.

3. The oven nozzle of a tenter frame as described in claim 1, characterized in that: A first fixing plate (5) is fixedly connected between the air inlet openings of the multiple nozzle units (1). The first fixing plate (5) has multiple first through slots corresponding to the air inlet openings of the nozzle units (1). A second fixing plate (6) is fixedly connected between the air inlet closed ends of the multiple nozzle units (1).

4. The oven nozzle of a tenter frame as described in claim 3, characterized in that: The nozzle unit (1) includes a cover plate (11), and a sealing plate (12) is fixedly connected to the bottom of one end of the cover plate (11). The height of the end of the cover plate (11) away from the sealing plate (12) is higher than the height of the end of the sealing plate (12) that is fixedly connected. Side plates (13) are fixedly connected to the bottom of both sides of the cover plate (11). The two side plates (13) are fixedly connected to the two side walls of the sealing plate (12). The bottom of the two side plates (13) on the side closest to each other is integrally formed with a base plate (14). The two base plates (14) are arranged opposite to each other. The nozzle slot (3) is located between the two base plates (14).

5. The oven nozzle of a tenter frame as described in claim 4, characterized in that: The air distribution assembly (4) includes a horizontal plate (41) positioned above the nozzle slit (3). The width of the horizontal plate (41) is greater than the width of the nozzle slit (3). Two base plates (14) are integrally formed with extension plates (42) on their respective sides. The top of the extension plates (42) abuts against the horizontal plate (41). Multiple air distribution ports are evenly distributed along the length of the horizontal plate (41). The width of each air distribution port is greater than the width of the nozzle slit (3). 3) The width of each of the air outlets is integrally formed with an air distribution plate (43) on the side near the sealing plate (12). The air distribution plate (43) is perpendicular to the horizontal plate (41) and extends towards the cover plate (11). The two sides of the horizontal plate (41) are integrally formed with U-shaped grooves (44). There is a gap between the bottom of the two grooves (44) and the bottom plate (14). The side walls of the two grooves (44) away from the horizontal plate (41) are fixedly connected to the two side plates (13).

6. The oven nozzle of a tenter frame as described in claim 4, characterized in that: Each of the sealing plates (12) has a cleaning port, and the second fixing plate (6) has a plurality of second through slots corresponding to the cleaning ports. A baffle (7) is detachably installed on the side wall of the second fixing plate (6) away from the sealing plate (12) on the outside of each second through slot by screws.

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