An adjustable air scoop

Abstract

The utility model relates to adjustable air hood, including casing, opening through -hole, around the axis of through -hole, the hole wall of through -hole opens first air outlet, the casing still opens the air inlet intercommunication first air outlet, baffle, the axis of through -hole is arranged in the casing, baffle divides the internal space of casing, forms the first air chamber intercommunication air inlet and the air outlet air chamber intercommunication first air outlet, adjustment air duct, one end intercommunication air outlet air chamber, the other end intercommunication hole wall of through -hole, wherein, along the axis of through -hole, baffle one end connects casing, and the other end of baffle and casing form equidistance gap, set up conic plug in adjustment air duct, control the opening of conic plug, control the opening degree of adjustment air duct, the utility model discloses through the conic plug in adjustment air duct, change the opening of conic plug to change the opening degree of adjustment air duct, change the blowing capacity of adjustment air duct to adjust pertinently to promote cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of blown film equipment technology, and in particular to an adjustable air hood. Background Technology

[0002] A blown film machine is a device that heats and melts plastic particles and then blows them into a thin film, often used to make packaging bags.

[0003] The product has a circular cross-section and is cooled by a ring-shaped cooling airflow blowing from all sides. When the product is not cooled, its strength is low, which limits the speed and flow rate of the high-speed airflow from the blower. However, during extrusion, stretching, and cooling, the thickness of the product is not always uniform due to factors such as the uniformity of the molten plastic temperature, the uniformity of the die nozzle thickness, and the uniformity of cooling. The thickness also varies when producing films of different specifications. When cooling products of different thicknesses with a gas flow rate at a fixed speed, thicker products cool more slowly, while thinner products may be deformed by the blowing.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an adjustable fan shroud to improve the cooling effect of the fan shroud.

[0006] The technical solution of this utility model is as follows:

[0007] The adjustable shroud includes:

[0008] The cover has a through hole; around the axis of the through hole, a first air outlet is formed on the wall of the through hole; the cover also has an air inlet connected to the first air outlet;

[0009] A baffle plate is disposed inside the housing around the axis of the through hole; the baffle plate divides the internal space of the housing to form a first air chamber that connects to the air inlet and an air outlet that connects to the first air outlet.

[0010] Adjust the air duct, one end of which is connected to the air outlet chamber, and the other end of which is connected to the wall of the through hole;

[0011] Along the axis of the through hole, one end of the baffle plate is connected to the cover, and the other end of the baffle plate forms an equidistant gap with the cover; a conical plug is provided in the regulating air duct; the opening degree of the conical plug is controlled to control the opening degree of the regulating air duct.

[0012] A further technical solution is that a first porous baffle is provided between the baffle and the air outlet chamber; the first porous baffle is arranged around the axis of the through hole; a second air chamber is formed between the first porous baffle and the baffle; and a first ventilation hole is opened on the first porous baffle around the axis of the through hole.

[0013] A further technical solution is that, along the axis of the through hole, at least two rows of the first ventilation holes are opened; adjacent rows of the first ventilation holes are staggered.

[0014] A further technical solution is that the first ventilation hole is opened on the side of the first porous wind baffle that is away from the equidistant gap.

[0015] A further technical solution is that a second porous baffle is provided between the first porous baffle and the air outlet chamber; the second porous baffle is arranged around the axis of the through hole; a third air chamber is formed between the first porous baffle and the second porous baffle; and a second ventilation hole is opened on the second porous baffle around the axis of the through hole.

[0016] A further technical solution is that, along the axis of the through hole, at least two rows of the second ventilation holes are opened; adjacent rows of the second ventilation holes are staggered.

[0017] A further technical solution is that the diameter of the first ventilation hole is smaller than the diameter of the second ventilation hole.

[0018] A further technical solution is that a baffle is also provided at the first air outlet; the gap between the baffle and the wall of the through hole connects the first air outlet, forming air outlet A and air outlet B.

[0019] A further technical solution is that, around the axis of the through hole, a guide extension is provided on the cover inside the air outlet chamber; the first air outlet and the regulating air duct are located on the opposite side of the guide extension.

[0020] A further technical solution is that the cover is rectangular; the air inlet is located at the top corner of the rectangular cover.

[0021] The beneficial technical effects of this utility model are as follows:

[0022] (1) The adjustable fan cover of this utility model has a through hole on the cover shell, and the first air outlet is arranged around the axis of the through hole to facilitate the circumferential airflow to cool the product. In addition, there are equidistant gaps in the cover shell. The airflow enters the air outlet chamber along the equidistant gaps, and after being evenly distributed, it blows onto the product to reduce the shaking of the product and cool the product evenly in the circumference, ensuring the cooling quality of the product. An adjustable air duct is also provided. The adjustable air duct and the first air outlet cooperate to blow airflow from multiple directions to cool the product, and the airflow coverage area is larger and more uniform. In addition, a conical plug is provided in the adjustable air duct. Adjusting the gap between the conical plug and the adjustable air duct changes the opening degree of the adjustable air duct, thereby changing the airflow volume of the adjustable air duct, and making targeted adjustments to improve the cooling effect.

[0023] (2) Furthermore, a first porous baffle plate and a second porous baffle plate are also provided to further uniformly blow out the airflow and avoid the airflow speed difference causing the product cooling speed layout to affect the thickness uniformity of the product after cooling.

[0024] (3) Furthermore, a baffle is installed at the first air outlet to divide the airflow from the first air outlet into two streams. The two streams of air increase the area of ​​the product being cooled simultaneously, thereby improving the uniformity of product cooling. The baffle also allows for easy adjustment of the angle of the airflow from air outlets A and B, preventing the airflow from blowing vertically onto the product and causing deformation. Attached Figure Description

[0025] Figure 1 A partial cross-sectional view of an adjustable shroud according to an embodiment of the present disclosure is shown.

[0026] Figure 2 A partially enlarged view of an adjustable shroud at point A, according to an embodiment of the present disclosure, is shown.

[0027] Marked in the attached diagram:

[0028] 1. Cover; 11. Air inlet; 12. First air chamber; 13. Through hole; 2. Baffle plate; 21. Second air chamber; 22. Equidistant gap; 3. First perforated baffle plate; 31. Third air chamber; 32. First ventilation hole; 4. Second perforated baffle plate; 41. Air outlet chamber; 42. First air outlet; 421. Air outlet A; 422. Air outlet B; 43. Guide extension; 44. Second ventilation hole; 5. Adjustable air duct; 51. Second air outlet; 52. Round hole; 6. Block; 61. Divider; 62. Upper guide; 63. Lower guide; 7. Screw hole. Detailed Implementation

[0029] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0030] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Figure 1 A partial cross-sectional view of an adjustable shroud according to an embodiment of the present disclosure is shown. Figure 2 A partially enlarged view of an adjustable shroud at point A, according to an embodiment of this disclosure, is shown. Please refer to... Figure 1 and Figure 2The adjustable fan cover includes a housing 1 with a through hole 13. A first air outlet 42 is formed on the wall of the through hole 13, surrounding its axis. The first air outlet 42 is positioned around the axis of the through hole 13 to facilitate circumferential airflow cooling the product. An air inlet 11 is also provided on the housing 1, connecting to the first air outlet 42. A baffle plate 2 is positioned inside the housing 1, surrounding the axis of the through hole 13. The baffle plate 2 divides the internal space of the housing 1, forming a first air chamber 12 connecting to the air inlet 11 and an air outlet chamber 41 connecting to the first air outlet 42. An adjustable air duct 5 connects at one end to the air outlet chamber 41 and at the other end to the wall of the through hole 13, forming a second air outlet 51. The adjustable air duct 5 and the first air outlet 42 work together to blow airflow from multiple directions to cool the product, resulting in a larger and more uniform airflow coverage area. Along the axis of the through hole 13, one end of the baffle plate 2 is connected to the cover 1, and the other end of the baffle plate 2 forms an equidistant gap 22 with the cover 1. The airflow enters the outlet air chamber 41 along the equidistant gap 22, and after being evenly distributed, it blows onto the product, reducing the vibration of the product and cooling the product evenly in the circumference, ensuring the cooling quality of the product. A conical plug (not shown in the figure) is installed in the regulating air duct 5. The position of the conical plug is controlled to control the opening degree of the regulating air duct 5, thereby changing the airflow of the regulating air duct 5 and making targeted adjustments to improve the cooling effect. Specifically, the regulating air duct 5 includes a circular hole 52, which is connected to the outlet air chamber 41. A conical plug is installed in the circular hole 52. Multiple circular holes 52 are provided around the through hole 13, and a conical plug is installed in each circular hole 52.

[0032] In some embodiments, a drive mechanism (not shown in the figure) is connected to the bottom of the conical plug to facilitate the automation of conical plug control. The drive mechanism includes a motor, an industrial computer, and a thickness probe. The motor and the conical plug can be connected by a ball screw or a rack and pinion structure to move the conical plug up and down, adjust the gap between the conical plug and the circular hole 52, and thus adjust the air intake of the regulating duct 5 to gradually bring the thickness of the product closer to the preset thickness. The motor is connected to the industrial computer and the thickness probe. The thickness probe can be an infrared sensor and an infrared light source. The thickness is detected by the difference in the infrared spectrum when the product thickness is different. Specifically, in the entire adjustment process of the regulating duct 5, after the industrial computer modulates the thickness deviation of the product measured by the thickness probe, it drives the conical plug to move through the motor, adjusts the opening of the regulating duct 5, and completes the self-adjustment of the opening of the regulating duct 5.

[0033] Each conical plug within a circular hole 52 is individually connected to a drive mechanism. A thickness probe can be individually installed at the second air outlet 51 corresponding to each circular hole 52 and connected to the drive mechanism. The airflow at the second air outlet 51 is controlled by adjusting the position of the conical plug in each circular hole 52 according to the varying thickness of the product. When the product thickness is too large, the airflow at the second air outlet 51 is reduced, extending the high-flow holding time and causing more stretching, thus reducing the product thickness. When the product thickness is too small, the airflow at the second air outlet 51 is increased, shortening the high-flow holding time and causing less stretching, thus increasing the product thickness. By controlling the airflow at the second air outlet 51, the thickness of the entire product is ensured to be uniform.

[0034] Please refer to Figure 1 and Figure 2 A first porous baffle plate 3 is also provided between the baffle plate 2 and the air outlet chamber 41. The first porous baffle plate 3 is arranged around the axis of the through hole 13. The first porous baffle plate 3 and the baffle plate 2 are separated to form a second air chamber 21. A first ventilation hole 32 is opened on the first porous baffle plate 3 around the axis of the through hole 13. When the airflow passes through the first ventilation hole 32, tiny vortices are generated at the edge of the hole, which promotes airflow mixing. Moreover, the airflow velocity decreases after passing through the first ventilation hole 32 and diffuses to the periphery, so as to uniformly blow the overall velocity of the airflow towards the product.

[0035] Preferably, at least two rows of first ventilation holes 32 are formed along the axis of the through hole 13. Adjacent rows of first ventilation holes 32 are staggered. The airflow is distributed into multiple jets through the staggered first ventilation holes 32, and the adjacent oblique jets collide and mix rapidly, further uniformly increasing the overall flow velocity of the airflow blowing towards the product.

[0036] More preferably, the first ventilation hole 32 is located on the side of the first porous baffle plate 3 away from the equidistant gap 22. After passing through the equidistant gap 22, the airflow is bent and flows towards the first ventilation hole 32. The bend disrupts the boundary layer of the airflow, generates turbulence, and promotes uniform mixing of the airflow.

[0037] Please refer to Figure 1 and Figure 2 A second porous baffle plate 4 is also provided between the first porous baffle plate 3 and the air outlet chamber 41. The second porous baffle plate 4 is arranged around the axis of the through hole 13. The first porous baffle plate 3 and the second porous baffle plate 4 separate to form a third air chamber 31. A second ventilation hole 44 is opened on the second porous baffle plate 4 around the axis of the through hole 13. When the airflow passes through the second ventilation hole 44, tiny vortices are generated at the edge of the hole, promoting airflow mixing. Moreover, after the airflow passes through the second ventilation hole 44, the flow velocity decreases and diffuses to the periphery, further uniformly blowing the overall flow velocity of the airflow towards the product.

[0038] Preferably, at least two rows of second ventilation holes 44 are formed along the axis of the through hole 13. Adjacent rows of second ventilation holes 44 are staggered. The airflow is distributed into multiple jets through the staggered second ventilation holes 44, and the adjacent oblique jets collide and mix rapidly, further uniformly increasing the overall flow rate of the airflow blowing towards the product.

[0039] More preferably, the diameter of the first vent 32 is smaller than the diameter of the second vent 44. The smaller diameter of the first vent 32 divides the airflow into more jets, enhancing airflow mixing. The larger diameter of the second vent 44 makes the airflow blowing towards the product smoother.

[0040] In some embodiments, the housing 1 has screw holes 7 to facilitate threaded connection of the first porous wind baffle 3 and the second porous wind baffle 4.

[0041] Please refer to Figure 1 and Figure 2 A baffle 6 is also provided at the first air outlet 42. The gap between the baffle 6 and the wall of the through hole 13 connects the first air outlet 42, forming air outlet A421 and air outlet B422. The baffle 6 divides the airflow from the first air outlet 42 into two streams. The two airflows increase the area of ​​the product being cooled simultaneously, improving the uniformity of cooling. The baffle 6 also allows for easy adjustment of the angle of the airflow from air outlets A421 and B422, preventing the airflow from blowing perpendicularly onto the product and causing deformation.

[0042] Preferably, a guide extension 43 is provided on the cover 1 inside the air outlet chamber 41 around the axis of the through hole 13. The first air outlet 42 and the regulating air duct 5 are located on the opposite side of the guide extension 43. The guide extension 43 guides the airflow in the separated air outlet chamber 41 to flow to the first air outlet 42 and the second air outlet 51 respectively, reducing the resistance during airflow separation.

[0043] More preferably, the housing 1 is rectangular. The air inlet 11 is located at the top corner of the rectangular housing 1. The rectangular housing 1 has a large space at the top corner, which facilitates the installation of a large-diameter air inlet 11. The large-diameter air inlet 11 reduces air pressure loss during airflow transmission, achieving low-pressure, high-volume air supply.

[0044] The specific workflow of this utility model is as follows:

[0045] When cooling the product, the product is located within the through hole 13. The size of the gap between the conical plug and the remote control 52 is adjusted to control the opening of the regulating air duct 5 to a suitable degree. Then, the fan (not shown in the figure) is started, and the fan sends air to the first air chamber 12 through the air inlet 11. The airflow delivered to the first air chamber 12 is evenly distributed along the equidistant gap 22, the second air chamber 21, the first ventilation hole 32, the third air chamber 31, and the second ventilation hole 44 before flowing into the outlet air chamber 41. The airflow in the outlet air chamber 41 is divided by the guide extension 43, with one part flowing to the first outlet and the other part flowing out from the second outlet along the conical plug and the regulating air duct 5. The airflow flowing to the first outlet 42 is further divided along the dividing part 61, with one part flowing out from the outlet A421 along the upper guide part 62 and the other part flowing out from the outlet B422 along the lower guide part 63. The airflow from air outlet A421, air outlet B422, and second air outlet 51 blows together onto the product to cool it.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An adjustable air scoop, characterized by, The adjustable shroud includes: The cover has a through hole; around the axis of the through hole, a first air outlet is formed on the wall of the through hole; the cover also has an air inlet connected to the first air outlet; A baffle plate is disposed inside the housing around the axis of the through hole; the baffle plate divides the internal space of the housing to form a first air chamber that connects to the air inlet and an air outlet that connects to the first air outlet. Adjust the air duct, with one end connected to the air outlet chamber and the other end connected to the wall of the through hole; Along the axis of the through hole, one end of the wind baffle is connected to the cover, and the other end of the wind baffle forms an equidistant gap with the cover; a conical plug is provided in the regulating air duct.

2. The adjustable hood of claim 1, wherein: A first perforated baffle is also provided between the baffle and the air outlet chamber; the first perforated baffle is arranged around the axis of the through hole; a second air chamber is formed between the first perforated baffle and the baffle. A first ventilation hole is formed on the first porous windbreak plate around the axis of the through hole.

3. The adjustable hood of claim 2, wherein: Along the axis of the through hole, at least two rows of the first ventilation holes are formed; adjacent rows of the first ventilation holes are staggered.

4. The adjustable hood of claim 2, wherein: The first ventilation hole is located on the side of the first porous baffle plate away from the equidistant gap.

5. The adjustable hood of claim 2, wherein: A second porous baffle is provided between the first porous baffle and the air outlet chamber; the second porous baffle is arranged around the axis of the through hole; a third air chamber is formed between the first porous baffle and the second porous baffle; a second ventilation hole is opened on the second porous baffle around the axis of the through hole.

6. The adjustable hood of claim 5, wherein: Along the axis of the through hole, at least two rows of the second ventilation holes are formed; adjacent rows of the second ventilation holes are staggered.

7. The adjustable hood of claim 5, wherein: The diameter of the first ventilation hole is smaller than the diameter of the second ventilation hole.

8. The adjustable hood of claim 1, wherein: A baffle is also provided at the first air outlet; the gap between the baffle and the wall of the through hole connects the first air outlet, forming air outlet A and air outlet B.

9. The adjustable hood of claim 1, wherein: Around the axis of the through hole, a guide extension is provided on the cover inside the air outlet chamber; the first air outlet and the regulating air duct are located on the opposite side of the guide extension.

10. The adjustable hood of claim 1, wherein: The casing is rectangular; the air inlet is located at the top corner of the rectangular casing.

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