Novel air ring structure for film blowing machine

Abstract

This application discloses a novel air ring structure for a blown film machine, comprising: an air ring body; a base with multiple air inlets connected to air inlets via air inlet pipes; an annular air outlet formed by the base and the air ring body; an arc-shaped baffle ring on the base; air channels spaced circumferentially on the arc-shaped baffle ring; and a first guide surface on the air ring body. The first guide surface guides the airflow blowing in from the air inlets, directing it towards the arc-shaped baffle ring. When the airflow reaches the arc-shaped baffle ring, a portion of the airflow enters the inner side of the arc-shaped baffle ring from the air channels there, while another portion flows to the next air channel under the guidance of the arc-shaped baffle ring, entering the inner side of the arc-shaped baffle ring from the next air channel. This allows the airflow to enter the inner side of the arc-shaped baffle ring from multiple air channels, effectively homogenizing the airflow. Furthermore, the arrangement of the air channels helps reduce the kinetic energy loss of the airflow.

Description

Technical Field

[0001] This application relates to the field of air ring technology, and in particular to a novel air ring structure for blown film machines. Background Technology

[0002] The air ring is an industrial device used in blown film units to cool and shape the blown film bubble. It is a key component of the blown film unit, and its cooling efficiency directly affects the quality of the film product and the production efficiency. After being homogenized by the air ring, the cold air forms a 360-degree annular airflow, which achieves uniform heat dissipation from the surface of the film bubble.

[0003] In existing technologies, airflow is homogenized using a windbreak assembly, ensuring a uniform distribution of airflow within the annular inner cavity. The gas is then blown out through an annular outlet, achieving cooling of the film surface. However, the windbreak assembly has limited homogenization capabilities and suffers significant airflow energy loss.

[0004] Therefore, it is necessary to propose a new air ring structure for blown film machines to improve the homogenization capability of the air ring, which has become an important technical problem that needs to be solved urgently. Utility Model Content

[0005] This application provides a novel air ring structure for a blown film machine, aiming to solve the problem in the prior art where airflow is homogenized by a baffle assembly, so that the airflow is evenly distributed in the annular inner cavity, and the gas is then blown out through the annular air outlet to cool the film surface. However, the baffle assembly has limited homogenization capability and suffers from significant airflow energy loss.

[0006] To achieve the above objectives, this application proposes a novel air ring structure for a blown film machine, comprising: an air ring body; a base, on which multiple air inlets are provided, and air inlets are connected to air pipes; an annular air outlet, which is formed by the base and the air ring body; an arc-shaped windbreak ring, which is provided on the base; air grooves, which are spaced apart circumferentially on the arc-shaped windbreak ring; and a first guide surface, which is provided on the air ring body.

[0007] In some embodiments, it further includes: an air guide ring, which is disposed on the base; and a second guide surface, which is disposed on the air guide ring.

[0008] In some embodiments, the device further includes: a first diverter plate connected to a base; a second diverter plate connected to an air ring body; a first sleeve integrally formed with the first diverter plate; and a second sleeve integrally formed with the second diverter plate, wherein the outer diameter of the first sleeve is smaller than the inner diameter of the second sleeve, and a portion of the first sleeve extends into the interior of the second sleeve.

[0009] In some embodiments, the system further includes: an air duct plate connected to a first distribution plate; and a plurality of distribution holes spaced apart on the first distribution plate.

[0010] In some embodiments, it also includes: The heat dissipation ring is connected to the second distribution plate; Multiple heat dissipation holes are provided at intervals on the heat dissipation ring.

[0011] In some embodiments, it further includes: a limiting ring, wherein a limiting ring is provided on the air ring body, and the second diverter is installed on the air ring body through the limiting ring.

[0012] In some embodiments, the system further includes a sealing gasket, wherein a sealing gasket is disposed between the air inlet pipe and the base.

[0013] This application proposes a novel air ring structure for a blown film machine, comprising: an air ring body; a base with multiple air inlets connected to air inlets via air inlet pipes; an annular air outlet formed by the base and the air ring body; an arc-shaped windbreak ring on the base; air grooves spaced circumferentially on the arc-shaped windbreak ring; and a first guide surface on the air ring body. The air ring body and the base form an annular cavity, through which airflow enters the air inlets along the air inlets and flows into the annular cavity. The first guide surface is used to guide the airflow blown in from the air inlet, so that the airflow blows towards the arc-shaped wind deflector ring. When the airflow blows towards the arc-shaped wind deflector ring, part of the airflow enters the inner side of the arc-shaped wind deflector ring from the air slot at that point, and another part of the airflow flows to the next air slot under the guidance of the arc-shaped wind deflector ring, and enters the inner side of the arc-shaped wind deflector ring from the next air slot. This allows the airflow to enter the inner side of the arc-shaped wind deflector ring from multiple air slots, which fully homogenizes the airflow. Furthermore, the arrangement of the air slots helps to reduce the kinetic energy loss of the airflow. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural schematic diagram of a novel air ring structure for a blown film machine according to one embodiment of this application; Figure 2 This is a top view of a novel air ring structure for a blown film machine according to an embodiment of this application; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 for Figure 3 A magnified view of a section at point B.

[0015] In the diagram: 1. Air ring body; 2. Second diversion plate; 3. Heat dissipation ring; 4. Second sleeve; 5. Base; 6. Air inlet pipe; 7. Heat dissipation hole; 8. First diversion plate; 9. Air duct plate; 10. First sleeve; 11. Diversion hole; 12. First guide surface; 13. Sealing gasket; 14. Annular air outlet; 15. Second guide surface; 16. Air guide ring; 17. Air groove; 18. Arc-shaped wind baffle ring; 19. Limiting baffle ring. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application proposes a novel air ring structure for a blown film machine, comprising: an air ring body 1; a base 5, on which multiple air inlets are provided, and air inlets are connected to air inlet pipes 6; an annular air outlet 14, which is formed by the base 5 and the air ring body 1; an arc-shaped wind baffle ring 18, which is provided on the base 5; air grooves 17, which are spaced apart circumferentially on the arc-shaped wind baffle ring 18; and a first guide surface 12, which is provided on the air ring body 1.

[0018] Among them, the air ring body 1 is the structural foundation of the new air ring structure. All other structures on the new air ring structure are directly or indirectly connected to the air ring body 1. The base 5 is connected to the air ring body 1 by screws. The air ring body 1 and the base 5 enclose an annular cavity. One end of the air inlet pipe 6 is screwed to the air inlet. The other end of the air inlet pipe 6 is connected to the fan through the pipe fitting. The fan generates airflow. The airflow enters the air inlet along the air inlet pipe 6 and flows into the annular cavity from the air inlet. After the airflow is homogenized in the annular cavity, it flows out from the annular air outlet 14 to achieve the cooling of the membrane bubble.

[0019] In this embodiment, the fan and the connection structure between the fan and the duct are mature existing technologies and are not the core inventive points of this application. Therefore, no specific limitations are imposed on the fan and the connection structure between the fan and the duct.

[0020] Among them, the arc-shaped wind deflector ring 18, the air trough 17, and the first guide surface 12 are the core structures of the first air ring. The first guide surface 12 is used to guide the airflow blown in from the air inlet, so that the airflow blows towards the arc-shaped wind deflector ring 18. When the airflow blows towards the arc-shaped wind deflector ring 18, part of the airflow enters the inner side of the arc-shaped wind deflector ring 18 from the air trough 17 there, and another part of the airflow flows to the next air trough 17 under the guidance of the arc-shaped wind deflector ring 18, and enters the inner side of the arc-shaped wind deflector ring 18 from the next air trough 17. It can be understood that the arc angle occupied by the air trough 17 is greater than 5°, and the number arranged along the circumference is not less than 48, so that the airflow entering from the air inlet can be fully homogenized by the arc-shaped wind deflector ring 18 and the air trough 17, and the setting of the air trough 17 is conducive to reducing the kinetic energy loss of the airflow. There is still a certain gap between the inner side of the arc-shaped wind deflector ring 18 and the annular air outlet 14. The air blown into the inner side of the arc-shaped wind deflector ring 18 is further homogenized during the process of flowing in the gap. The further homogenized airflow is discharged from the annular air outlet 14 to achieve uniform cooling of the membrane bubble.

[0021] Specifically, the air ring body 1 and the base 5 enclose an annular cavity. Airflow enters the air inlet along the air inlet pipe 6 and flows into the annular cavity from the air inlet. The first guide surface 12 is used to guide the airflow blown in from the air inlet, so that the airflow blows towards the arc-shaped wind deflector ring 18. When the airflow blows towards the arc-shaped wind deflector ring 18, part of the airflow enters the inner side of the arc-shaped wind deflector ring 18 from the air groove 17 at that location, and another part of the airflow flows to the next air groove 17 under the guidance of the arc-shaped wind deflector ring 18, and enters the inner side of the arc-shaped wind deflector ring 18 from the next air groove 17. This allows the airflow to enter the inner side of the arc-shaped wind deflector ring 18 from multiple air grooves 17, which fully homogenizes the airflow. Furthermore, the arrangement of the air grooves 17 helps to reduce the kinetic energy loss of the airflow.

[0022] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the system further includes: an air guide ring 16, which is disposed on the base 5; and a second guide surface 15, which is disposed on the air guide ring 16. The second guide surface 15 can guide the airflow, allowing the airflow to flow better towards the annular air outlet 14 and reducing the kinetic energy loss of the airflow.

[0023] In this embodiment, the bottom of the second guide surface 15 is flush with the top of the annular air outlet 14, so that the airflow can flow better to the annular air outlet 14 under the action of the second guide surface 15, reducing the kinetic energy loss of the airflow.

[0024] See Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, it further includes: a first diverter plate 8, which is connected to the base 5 by screws; a second diverter plate 2, which is connected to the air ring body 1 by screws. A first sleeve 10 is integrally formed with the first diverter plate 8; a second sleeve 4 is integrally formed with the second diverter plate 2, wherein the outer diameter of the first sleeve 10 is smaller than the inner diameter of the second sleeve 4, and the first sleeve 10 partially extends into the interior of the second sleeve 4. A cooling zone is formed inside the first sleeve 10, through which the membrane bubble passes. A first air duct is formed between the first diverter plate 8 and the second diverter plate 2. Airflow discharged from the annular air outlet 14 enters the first air duct and flows through the gap between the first sleeve 10 and the second sleeve 4 to the membrane bubble in the cooling zone. The arrangement of the second sleeve 4 avoids direct impact of airflow on the membrane bubble, thereby preventing the membrane bubble from forming a depression under the impact of airflow. Furthermore, the design of the first air duct also helps to extend the airflow path, further homogenizing the airflow.

[0025] See Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, it further includes: an air duct plate 9, which is connected to the first distribution plate 8; the air duct plate 9 is connected to the base 5 by screws, and a second air duct is formed between the air duct plate 9 and the first distribution plate 8. Multiple distribution holes 11 are spaced apart on the first distribution plate 8. The multiple distribution holes 11 are circumferentially spaced on the first distribution plate 8, and airflow enters the second air duct from the distribution holes 11 and flows along the second air duct to the membrane bubble in the cooling zone.

[0026] In this embodiment, a guide cone surface is provided on the inner side of the air duct plate 9. The guide cone surface can change the airflow direction to a certain extent, allowing the airflow in the second air duct to flow downwards along the cooling zone, increasing the cooling area and enabling the membrane bubble to be cooled better. It is understood that the airflow intensity in the second air duct is much less than the airflow intensity in the first air duct.

[0027] See Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, it further includes: a heat dissipation ring 3, which is connected to the second distribution plate 2; the heat dissipation ring 3 is connected to the second distribution plate 2 by screws. Multiple heat dissipation holes 7 are spaced apart on the heat dissipation ring 3. The high-temperature gas after heat exchange with the membrane bubble is discharged through the heat dissipation holes 7, improving the heat dissipation effect.

[0028] See Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, it further includes: a limiting ring 19, which is provided on the air ring body 1, and the second diverter plate 2 is installed on the air ring body 1 through the limiting ring 19. The limiting ring 19 is used to position the second diverter plate 2, and the second diverter plate 2 and the heat dissipation ring 3 are both connected to the limiting ring 19 by screws.

[0029] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, a sealing gasket 13 is further included, which is disposed between the air inlet pipe 6 and the base 5. The sealing gasket 13 is used to improve the sealing effect between the air inlet pipe 6 and the base 5, prevent airflow leakage, and reduce airflow loss.

[0030] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A novel air ring structure for a blown film machine, characterized in that, include: Wind ring body (1); The base (5) is provided with multiple air inlets, and the air inlets are connected to air inlet pipes (6). The annular air outlet (14) is formed by the base (5) and the air ring body (1). Arc-shaped windbreak ring (18), the arc-shaped windbreak ring (18) is provided on the base (5); Wind troughs (17), the arc-shaped windbreak ring (18) is provided with several wind troughs (17) spaced apart in the circumferential direction; The first guide surface (12) is provided on the air ring body (1).

2. The novel air ring structure for a blown film machine according to claim 1, characterized in that, Also includes: Air guide ring (16), the air guide ring (16) is provided on the base (5); The second guide surface (15) is provided on the air guide ring (16).

3. The novel air ring structure for a blown film machine according to claim 1, characterized in that, Also includes: The first diversion plate (8) is connected to the base (5). The second diversion plate (2) is connected to the air ring body (1); The first sleeve (10) is integrally formed with the first distribution plate (8); The second sleeve (4) is integrally formed with the second diverter plate (2). The outer diameter of the first sleeve (10) is smaller than the inner diameter of the second sleeve (4). The first sleeve (10) extends into the interior of the second sleeve (4).

4. The novel air ring structure for a blown film machine according to claim 3, characterized in that, Also includes: Air duct plate (9), the air duct plate (9) is connected to the first distribution plate (8); Multiple diversion holes (11) are provided on the first diversion disk (8) at intervals.

5. A novel air ring structure for a blown film machine according to claim 3, characterized in that, Also includes: Heat dissipation ring (3), the heat dissipation ring (3) is connected to the second distribution disk (2); Multiple heat dissipation holes (7) are provided on the heat dissipation ring (3) at intervals.

6. The novel air ring structure for a blown film machine according to claim 3, characterized in that, Also includes: Limiting ring (19) is provided on the air ring body (1), and the second diverter plate (2) is installed on the air ring body (1) through the limiting ring (19).

7. The novel air ring structure for a blown film machine according to claim 1, characterized in that, Also includes: A sealing gasket (13) is provided between the air inlet pipe (6) and the base (5).

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