A blow nozzle with replaceable air outlet

Abstract

The utility model belongs to the technical field of oven accessories, specifically relates to a tuyere with replaceable air outlet, provide a tuyere with replaceable air outlet, aims at solving the problem of big difficulty of internal tuyere replacement of oven in prior art. A tuyere with replaceable air outlet, including upper pressure plate and lower pressure plate, be provided with the hole plate between the upper pressure plate with the lower pressure plate, be provided with the upper air hole on the upper pressure plate, be provided with the lower air hole on the lower pressure plate, be provided with the air outlet on the hole plate, the utility model discloses the positioning between the hole plate of lower pressure plate with the distance between upper pressure plate and lower pressure plate, and this positioning mode is simple and stable. And the hole form of hole plate is various, can be long waist hole, can be round hole, and the hole lower pressure plate is fixed on the upper pressure plate according to the process need, when the existing hole plate can not satisfy the process demand, only need to unscrew the screw, remove the lower pressure plate, can conveniently replace the hole plate.

Description

Technical Field

[0001] This utility model belongs to the technical field of oven accessories, specifically relating to a replaceable air nozzle. Background Technology

[0002] Ovens are widely used in the film-making and coating industries. Existing ovens typically use perforated stainless steel sheets as hot air outlets for their internal air nozzles. Once these nozzles are manufactured, the outlet area is fixed, and they can only meet a portion of the process requirements during production. In other words, the nozzles in the current technology are integral structures, and if the nozzle design fails to meet the process requirements, the entire unit must be disassembled and replaced, which is difficult and impractical. Summary of the Invention

[0003] This invention provides a replaceable air nozzle, which aims to solve the problem of the difficulty in replacing the internal air nozzles of the oven in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A replaceable air outlet nozzle includes an upper pressure plate and a lower pressure plate. A perforated plate is provided between the upper pressure plate and the lower pressure plate. An upper air outlet is provided on the upper pressure plate, and a lower air outlet is provided on the lower pressure plate. The upper air outlet communicates with the lower air outlet through the air outlet. A sealing ring is provided between the upper pressure plate and the lower pressure plate; The lower pressure plate uses the distance between the upper pressure plate and the lower pressure plate to position the perforated plate between the upper pressure plate and the lower pressure plate, and the lower pressure plate is fixed to the upper pressure plate by screws.

[0005] A further improvement: The upper pressure plate is provided with an upper ring groove for installing the sealing ring.

[0006] Based on the above technical solution: the upper annular groove provides a precise installation position for the sealing ring, allowing it to be securely nested within it. When the upper and lower pressure plates are closed, the sealing ring is tightly pressed between them. Due to the positioning effect of the upper annular groove, the sealing ring will not shift or misalign. This effectively prevents hot air from leaking out through the gap between the sealing ring and the pressure plates, greatly enhancing the sealing performance of the nozzle and ensuring that hot air flows out through the outlet hole according to the designed path, thus improving the utilization rate of hot air. The presence of the upper annular groove increases the contact area between the sealing ring and the upper pressure plate, making the connection between them more robust. During furnace operation, the nozzle is subjected to the pressure and vibration of hot air. The upper annular groove prevents the sealing ring from loosening or falling off due to these external forces, thereby improving the stability of the entire nozzle structure. A stable structure ensures that the nozzle maintains normal operating condition during long-term use, reducing the probability of malfunctions.

[0007] A further improved solution: The lower pressure plate is provided with a lower ring groove for installing the sealing ring, a part of the sealing ring is located in the upper ring groove, and the other part of the sealing ring is located in the lower ring groove.

[0008] Based on the above technical solution: the lower pressure plate is equipped with a lower annular groove, which works together with the upper annular groove of the upper pressure plate, allowing part of the sealing ring to be in the upper annular groove and part in the lower annular groove. This design forms a continuous and tight sealing space, effectively blocking any attempt by hot air to leak from any direction. During the oven's operation, the hot air generates a certain pressure. The structure of the sealing ring spanning the upper and lower annular grooves better adapts to this pressure change. When the hot air pressure increases, the sealing ring is more tightly compressed under the constraint of the upper and lower annular grooves, further enhancing the sealing effect; while when the pressure decreases, the sealing ring maintains a stable sealing state and will not leak due to pressure fluctuations.

[0009] A further improved solution: the sealing ring is made of PTFE packing.

[0010] Based on the above technical solutions: PTFE packing possesses excellent chemical stability, resisting almost all common chemicals, including strong acids, strong alkalis, and organic solvents. In the oven environments of the film-making and coating industries, various chemicals may be encountered. Using PTFE packing as a sealing ring effectively prevents these chemicals from corroding the sealing material, thus maintaining stable sealing performance over a long period and avoiding hot air leakage problems caused by chemical corrosion. PTFE packing has a dense molecular structure and extremely low gas and liquid permeability. As hot air passes through the nozzle, it forms a reliable barrier, preventing hot air from leaking out from the seal. Compared to some ordinary sealing materials, PTFE packing can more effectively maintain stable pressure inside the nozzle, ensuring that hot air flows out along a predetermined path and flow rate, improving thermal energy utilization efficiency.

[0011] A further improvement: A welded part is provided between the screw and the lower pressure plate to prevent the screw from loosening.

[0012] Based on the above technical solution: During the operation of ovens in the film-making and coating industries, the equipment experiences varying degrees of vibration and impact. Ordinary screw connections are prone to loosening under prolonged exposure to these external forces, affecting the structural integrity and sealing performance of the nozzles. However, the addition of a welded section creates a robust connection that effectively resists vibration and impact, tightly binding the screws to the lower pressure plate, preventing loosening, and ensuring the nozzles maintain a stable structure even under harsh operating conditions. The nozzles in the oven need to withstand the pressure of hot air and various forces acting on their own structure. The welded section enhances the connection strength between the screws and the lower pressure plate, enabling them to withstand greater tensile and shear forces. Even under high hot air pressure or when the nozzles are subjected to unexpected external forces, the screws are prevented from being easily pulled out or sheared, thus maintaining the normal operating condition of the nozzles.

[0013] A further improved solution: The lower pressure plate is provided with a through hole for the screw to pass through, and the upper pressure plate is provided with a screw hole that mates with the screw.

[0014] Based on the above technical solution: the through holes on the lower pressure plate provide a clear path for the screws to pass through, while the screw holes on the upper pressure plate precisely mate with the screws. During installation, operators can easily pass the screws through the through holes in the lower pressure plate and accurately screw them into the screw holes in the upper pressure plate. This design ensures that the upper and lower pressure plates can be quickly and accurately positioned during assembly, avoiding problems such as poor sealing or structural instability caused by installation deviations, greatly improving installation efficiency and accuracy. The threaded engagement of the screws and screw holes forms a reliable mechanical connection. When the screw is screwed into the screw hole, the friction and engagement force between the threads can withstand a certain amount of tensile and shear forces, tightly connecting the upper and lower pressure plates together. This stable connection ensures that the nozzle will not easily separate or loosen during operation, even under the pressure of hot air or vibrations from equipment, thus ensuring the integrity and stability of the nozzle structure.

[0015] A further improved solution: The screw is a countersunk screw, and the lower pressure plate has a groove on the side away from the upper pressure plate to accommodate the screw head.

[0016] Based on the above technical solutions: In equipment used in the film-making and coating industries, the neatness and aesthetics of the overall appearance have a significant impact on the overall image of the equipment and the working environment. Using countersunk screws with recesses to accommodate the screw heads allows the screw heads to be completely recessed into the lower pressure plate, avoiding the situation where ordinary screw heads protrude. This results in a smoother, flatter surface, improving the equipment's appearance and making it look more professional and refined. When screw heads protrude from the lower pressure plate surface, they create uneven protrusions, affecting not only the appearance but also potentially interfering with other components during operation. The recessed design allows the countersunk screw heads to be fully accommodated, keeping the lower pressure plate surface flat and reducing structural unevenness caused by protruding screws, thus contributing to the overall stable operation of the equipment.

[0017] A further improved solution: the welded part is located between the nail head and the groove.

[0018] Based on the above technical solution: In the operation of ovens in the film-making and coating industries, the equipment generates continuous vibration and intermittent impacts. Ordinary screw connections are prone to loosening under such conditions due to vibration. When the welded part is located between the screw head and the groove, the screw head is tightly welded to the lower pressure plate. This welded connection can withstand greater tensile and shear forces, effectively resisting external forces from vibration and impact, greatly reducing the possibility of screw loosening, and ensuring the long-term stability of the connection between the upper and lower pressure plates. The welded part makes the screw and lower pressure plate a more tightly integrated whole. Under the pressure of hot air, the nozzle structure needs to maintain overall consistency to evenly distribute the pressure. The presence of the welded part avoids relative displacement between the upper and lower pressure plates due to screw loosening, thus ensuring the integrity of the nozzle structure and allowing hot air to pass through the nozzle stably as designed, improving the operational reliability of the equipment.

[0019] Further improvements: the air outlet is a single elongated hole; or, the air outlet is multiple elongated holes; or, the air outlet is a row of round holes; or, the air outlet is multiple rows of round holes.

[0020] Based on the above technical solutions: a single elongated air outlet can concentrate the output of hot air. In the film-making and coating industries, when high-intensity heating or drying is required in a specific area, this concentrated output method allows hot air to be concentrated on the target area at a higher flow rate and speed. Two parallel elongated air outlets can distribute hot air evenly over a wider area. During film-making and coating processes, if the area of ​​the film material to be heated or dried is large, the two air outlets can simultaneously cover different areas, ensuring that the hot air is evenly distributed across the entire material surface, avoiding problems such as localized overheating or uneven drying. On continuous coating production lines, two parallel air outlets can ensure that the coated material receives consistent heating and drying treatment across its entire width, improving product quality consistency.

[0021] The beneficial effects of this utility model are as follows: This invention positions the perforated plate between the upper and lower pressure plates using a lower pressure plate, a simple and stable positioning method. The lower pressure plate is fixed to the upper pressure plate with screws. When the existing perforated plate cannot meet the process requirements, simply unscrew the screws and remove the lower pressure plate to easily replace the perforated plate. After replacing with a suitable perforated plate, the lower pressure plate is reinstalled. The entire process is simple and does not require complete removal and replacement of the air nozzle.

[0022] Because perforated plates are easily replaceable, different perforated plates can be configured with different air outlet parameters. In the film-making and coating industries, different products and production processes have different requirements for the hot air outlet area, air volume, and air outlet direction. By changing the perforated plate, various process requirements can be quickly adapted, improving the versatility and flexibility of the oven equipment. Furthermore, the perforated plates offer diverse opening forms; they can be a single elongated hole or multiple holes; they can be a row of round holes or multiple rows, depending on the process requirements. Changing the perforated plate is simple and convenient. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a front view of a replaceable air outlet nozzle according to the present invention.

[0025] Figure 2 This is a left view of a replaceable air outlet nozzle according to the present invention.

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 This is a top view of the upper pressure plate of a replaceable air outlet nozzle according to this utility model.

[0028] Figure 5 This is a top view of the lower pressure plate in a replaceable air outlet nozzle according to this utility model.

[0029] Figure 6 This is a top view of a nozzle with a replaceable air outlet, wherein an air outlet hole is provided on the perforated plate.

[0030] Figure 7 This is a top view of a nozzle with two air outlets on a perforated plate according to the present invention.

[0031] Explanation of the labels in the diagram: 1-Upper pressure plate; 2-Lower pressure plate; 3-Orifice plate; 4-Upper air hole; 5-Lower air hole; 6-Air outlet; 7-Sealing ring; 8-Screw; 9-Upper ring groove; 10-Lower ring groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by users of the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0033] refer to Figures 1 to 7 A replaceable air outlet nozzle includes an upper pressure plate 1 and a lower pressure plate 2. A perforated plate 3 is provided between the upper pressure plate 1 and the lower pressure plate 2. An upper air hole 4 is provided on the upper pressure plate 1, and a lower air hole 5 is provided on the lower pressure plate. An air outlet 6 is provided on the perforated plate 3, and the upper air hole 4 communicates with the lower air hole 5 through the air outlet 6. A sealing ring 7 is provided between the upper pressure plate 1 and the lower pressure plate 2, and the perforated plate 3 is located within the area enclosed by the sealing ring 7; The lower pressure plate uses the distance between the upper pressure plate and the lower pressure plate to position the perforated plate 3 between the upper pressure plate and the lower pressure plate, and the lower pressure plate is fixed to the upper pressure plate by screws 8.

[0034] There can also be two sealing rings 7, with a sealing ring 7 between the orifice plate 3 and the upper pressure plate 1, and a sealing ring 7 between the orifice plate 3 and the lower pressure plate 2.

[0035] The upper pressure plate has an upper ring groove 9 for mounting the sealing ring 7. The lower pressure plate has a lower ring groove 10 for mounting the sealing ring 7, with a portion of the sealing ring 7 located in the upper ring groove 9 and the other portion located in the lower ring groove 10. The sealing ring 7 is made of PTFE packing.

[0036] Specifically: a welded portion is provided between the screw 8 and the lower pressure plate to prevent the screw 8 from loosening. The lower pressure plate has a through hole through which the screw 8 passes, and the upper pressure plate has a threaded hole that mates with the screw 8. The screw 8 is a countersunk screw, and a groove for accommodating the screw head is provided on the side of the lower pressure plate away from the upper pressure plate. The welded portion is located between the screw head and the groove.

[0037] Wherein: the upper air vent 4 is an elongated waist-shaped vent, and the lower air vent 5 is an elongated waist-shaped vent. The air outlet 6 is elongated and there is one air outlet 6; or, there are two air outlets 6, which are parallel to each other. The air outlet 6 is a single elongated waist-shaped vent; or, the air outlet is multiple elongated waist-shaped vents; or, the air outlet is a row of round holes; or, the air outlet is multiple rows of round holes. The nozzle has an upper pressure plate 1 welded to the air outlet surface of the duct. A 20mm wide, elongated upper air hole 4 is machined in the middle of the upper pressure plate 1 to guide airflow. A 4mm wide, 3mm deep upper annular groove 9 is machined on the outer side of the groove for installing PTFE packing for sealing. Similarly, a 20mm wide, elongated lower air hole 5 and a 4mm wide, 3mm deep lower annular groove 10 are machined in the middle of the lower pressure plate 2. The perforated plate 3 is made of 1.5mm stainless steel plate, with air outlet holes 6 cut into it according to process requirements. The perforated plate 3 is sandwiched between the PTFE packing of the upper and lower pressure plates 2. The upper and lower pressure plates 2 are tightened onto the perforated plate 3 by countersunk screws 8. To prevent the countersunk screws 8 from loosening, the tail of the screw 8 is spot-welded to the lower pressure plate 2 after installation. When the perforated plate 3 needs to be replaced, the weld point at the tail of the countersunk screw 8 is ground off, the lower pressure plate 2 is removed, a new perforated plate 3 is replaced, and then it is reinstalled. This design can change the air velocity and air outlet distribution of the nozzle by replacing the perforated plate 3 with different openings to meet different process requirements.

[0038] The working principle of this embodiment: The upper pressure plate 1 and the lower pressure plate 2 cooperate to form a relatively enclosed space, within which the perforated plate 3 is placed. A sealing ring 7 surrounds the perforated plate 3, providing a seal to prevent hot air leakage from the gap between the perforated plate 3 and the pressure plate, ensuring that the hot air flows out through the air outlet 6 along the designed path. The upper pressure plate 1 has an upper air outlet 4, the lower pressure plate 2 has a lower air outlet 5, and the perforated plate 3 has an air outlet 6. During oven operation, hot air enters through the upper air outlet 4 of the upper pressure plate 1, then flows through the air outlet 6 on the perforated plate 3, and finally exits through the lower air outlet 5 of the lower pressure plate 2, ultimately acting on the material being coated and coated. By adjusting the size, number, and distribution of the air outlet 6 on the perforated plate 3, the air outlet area, air volume, and air outlet direction of the hot air can be precisely controlled. The lower pressure plate 2 uses the distance between the upper pressure plate 1 and the lower pressure plate 2 to position the perforated plate 3 between them; this positioning method is simple and stable. The lower pressure plate 2 is fixed to the upper pressure plate 1 by screws 8. When the existing perforated plate 3 cannot meet the process requirements, simply unscrew the screws 8, remove the lower pressure plate 2, and the perforated plate 3 can be easily replaced. After replacing it with a perforated plate 3 of the appropriate size, the lower pressure plate 2 is reinstalled. The whole process is simple and does not require the complete removal and replacement of the air nozzle.

[0039] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A replaceable air outlet nozzle, characterized in that: It includes an upper pressure plate and a lower pressure plate, with a perforated plate between the upper pressure plate and the lower pressure plate. The upper pressure plate has an upper air hole, and the lower pressure plate has a lower air hole. The perforated plate has an air outlet hole, and the upper air hole communicates with the lower air hole through the air outlet hole. A sealing ring is provided between the upper pressure plate and the lower pressure plate; The lower pressure plate uses the distance between the upper pressure plate and the lower pressure plate to position the perforated plate between the upper pressure plate and the lower pressure plate, and the lower pressure plate is fixed to the upper pressure plate by screws.

2. The replaceable air outlet nozzle according to claim 1, characterized in that: The upper pressure plate is provided with an upper ring groove for installing the sealing ring.

3. The replaceable air outlet nozzle according to claim 2, characterized in that: The lower pressure plate is provided with a lower ring groove for installing the sealing ring, a part of the sealing ring is located in the upper ring groove, and the other part of the sealing ring is located in the lower ring groove.

4. The replaceable air outlet nozzle according to claim 1, characterized in that: The sealing ring is made of PTFE packing.

5. The replaceable air outlet nozzle according to claim 1, characterized in that: A welded part is provided between the screw and the lower pressure plate to prevent the screw from loosening.

6. A replaceable air outlet nozzle according to claim 5, characterized in that: The lower pressure plate is provided with a through hole for the screw to pass through, and the upper pressure plate is provided with a screw hole that mates with the screw.

7. A replaceable air outlet nozzle according to claim 6, characterized in that: The screw is a countersunk screw, and the lower pressure plate has a groove on the side away from the upper pressure plate to accommodate the screw head.

8. A replaceable air outlet nozzle according to claim 7, characterized in that: The welded portion is located between the nail head and the groove.

9. A replaceable air outlet nozzle according to claim 1, characterized in that: The air outlet is a single elongated hole; or, the air outlet is multiple elongated holes; or, the air outlet is a row of round holes; or, the air outlet is multiple rows of round holes.

Images