Air knife with porous structure and protection function

Abstract

The utility model relates to the technical field of air knives, and discloses an air knife with a porous structure and a protection function, through a plurality of straight holes and inclined holes formed in a knife mouth part, air blown out of the knife mouth part is in a point shape and is matched with multiple holes to form a linear air curtain with dense straight lines, the air drying effect of the device is greatly improved, and the service life of the device is prolonged. According to the air knife, the internal flow guide type structure is adopted, the air guide groove base is arranged at the transition position of the air storage area and the compression area in the air knife body, the groove corner part in the air knife body can be prevented from disturbing air through flow guide of the groove opening of the air guide groove base, and the smoothness of air circulation can be effectively improved; the stability of blowing airflow can be effectively improved by matching with shunting conduction of the shunting plate, and small wings are arranged at the edge part of the knife mouth part and can be inserted into a conveying wheel on a circuit board air drying assembly line so as to prevent a circuit board from falling off; conveying of workpieces such as the circuit board is not blocked or affected, upward-floating displacement and shaking of the circuit board caused by air pressure can be avoided, and the working stability of the device can be improved.

Description

Technical Field

[0001] This utility model relates to the field of air knife technology, specifically an air knife with a porous structure and protective function. Background Technology

[0002] An air knife is a tool for removing impurities from workpieces. As one of the most commonly used air blowing devices, it is mainly used for product cooling, cleaning, liquid blowing, and drying, and is widely used in industries such as printing, electronic electroplating, hardware, pharmaceuticals, and printed circuit boards.

[0003] In the production of circuit boards, air knives are used for drying. Currently, commonly used air knives are mostly designed with fixed air outlets, and the air jets they blow are linear. They can only be used in some general applications and cannot be used to dry the grooves and blind holes of special workpieces such as circuit boards or to achieve rapid drying. This cannot meet the production requirements, so the only solution is to use an angled air knife. In order to increase the water cutting of the object surface and reduce the amount of chemical liquid carried out, high flow rate and pressure output conditions are required. Under high flow rate or pressure conditions, the object is prone to wobble and vibration. Therefore, the mechanism design needs to suppress the rollers to overcome the upward displacement and vibration of the object caused by air pressure. The working stability is poor. To address this, an air knife with a porous structure and protective function is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an air knife with a porous structure and protective function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air knife with a porous structure and protective function, comprising an air knife body and an air duct, wherein the air duct is connected and installed at the lower part of the air knife body, the air knife body is tapered from bottom to top, and the interior of the air knife body is sequentially provided with an air storage area, a compression area and an air outlet area;

[0006] An air guide trough seat is provided on the connecting side between the air storage area and the compression area. A flow divider plate is provided on the upper part of the air guide trough seat. A blade tip is provided on the upper part of the air knife body. Straight holes and oblique holes are evenly provided on the upper part of the blade tip. Small fins are evenly provided on both sides of the blade tip.

[0007] Preferably, an air supply connection hole is provided through the middle of the bottom side of the air knife body, and the end of the air duct is fixedly connected to the air supply connection hole.

[0008] Preferably, both ends of the air knife body are provided with end caps, and the two sets of end caps are fixedly installed on the open sides of both ends of the air knife body. Silicone gaskets are provided on the mounting sides of the end caps and the air knife body.

[0009] Preferably, the aforementioned air storage zone, compression zone, and air outlet zone are arranged sequentially from bottom to top on the inner cavity side of the air knife body, and the air storage zone, compression zone, and air outlet zone are interconnected.

[0010] Preferably, the side seat of the air guide slot is fitted and supported by the groove provided on the side of the inner cavity of the air storage area. The bottom plate of the air guide slot is provided through the air guide slot in the middle. Inclined air guide plates are provided on both sides of the upper part of the air guide slot.

[0011] Preferably, the aforementioned diverter plate is located above the air guide slot seat, and the side plate portion of the diverter plate is fitted and supported by the groove provided on the side of the inner cavity of the compression zone. Diverter holes are uniformly and evenly provided in a equidistant pattern in the middle of the diverter plate.

[0012] Preferably, the blade tip is fixedly disposed on the upper part of the air knife body, and the straight holes and oblique holes are uniformly and evenly opened through the upper part of the blade tip at equal intervals.

[0013] Preferably, the two sets of small wings are symmetrically fixed on both sides of the blade tip, and the small wings on one side are evenly distributed at equal intervals.

[0014] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0015] This air knife, with its numerous straight and oblique holes on the nozzle, directs the airflow in a point-like pattern. The combination of these holes creates a dense, linear air curtain, ideal for drying circuit boards. It not only dries water stains on the board surface but also removes water from small holes within the board, significantly improving the drying effect. The air knife employs an internal airflow guiding structure. An air guide slot is located at the transition between the air storage and compression zones inside the air knife body. The slot guide prevents airflow turbulence caused by the corners of the air knife body, effectively improving airflow smoothness. Combined with the flow divider plate, this enhances the stability of the airflow. Furthermore, small fins are located on the edge of the nozzle. During high-speed operation, these fins can insert into the conveyor wheels on the circuit board drying line, preventing the circuit boards from falling. This avoids obstructing the transport of circuit boards and other workpieces and prevents upward displacement and vibration of the circuit boards due to air pressure, thus improving the stability of the device. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a partial cross-sectional structural diagram of the air knife body of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall side planar structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0021] Figure 5 For the present utility model Figure 1 Schematic diagram of the structure of region A in the middle;

[0022] Figure 6 This is a schematic diagram of the planar structure of the diverter plate of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Air knife body; 11. Air storage area; 12. Compression area; 13. Air outlet area; 14. Air guide slot seat; 141. Air guide slot; 15. Diverter plate; 151. Diverter hole; 16. Knife nozzle; 161. Straight hole; 162. Angled hole; 163. Small fin; 17. End cap seat; 18. Air supply connection hole; 2. Air duct. Detailed Implementation

[0024] 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.

[0025] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0026] Example

[0027] Please see Figure 1-6 This utility model provides a technical solution: an air knife with a porous structure and protective function, comprising an air knife body 1 and an air duct 2, as shown in the attached figure. Figure 1As shown, the air knife body 1 tapers from bottom to top, and the air duct 2 is connected and installed at the lower part of the air knife body 1. Specifically, see attached... Figure 2 As shown, to facilitate the connection and installation of the air duct 2, an air supply connection hole 18 is provided through the middle of the bottom side of the air knife body 1. The end of the air duct 2 is fixedly connected to the air supply connection hole 18 for the air supply of the device. In order to seal the end of the air knife body 1, as shown in the attached figure... Figure 3 As shown, plug end seats 17 are provided at both ends of the air knife body 1. The two sets of plug end seats 17 are fixedly installed on the open sides of both ends of the air knife body 1. In order to improve the sealing performance at the connection between the plug end seat 17 and the air knife body 1, silicone gaskets are provided on the mounting side of the plug end seat 17 and the air knife body 1.

[0028] To achieve airflow connection, see attached Figure 4 As shown, an air storage area 11, a compression area 12, and an air outlet area 13 are sequentially arranged inside the air knife body 1. These areas are distributed from bottom to top along the inner cavity of the air knife body 1 and are interconnected. To achieve airflow convergence and guidance, an air guide seat 14 is provided on the connecting side between the air storage area 11 and the compression area 12. Specifically, the side seat of the air guide seat 14 is fitted and supported by a groove on the inner cavity side of the air storage area 11. The bottom plate of the air guide seat 14 penetrates through the groove. The air duct 141 and the upper sides of the air duct seat 14 are provided with inclined air guide plates. The airflow through the duct opening of the air duct seat 14 can avoid the air turbulence caused by the corner of the duct inside the air knife body 1, which can effectively improve the smoothness of airflow. In conjunction with the diversion plate 15, the airflow can be effectively improved to enhance the stability of the blowing airflow. In order to further improve the stability of the blowing airflow, a diversion plate 15 is provided on the upper part of the air duct seat 14. The diversion plate 15 is located above the air duct seat 14. Specifically, the side plate of the diversion plate 15 is fitted and supported by the groove provided on the side of the inner cavity of the compression zone 12, as shown in the attached figure. Figure 6 As shown, in order to facilitate airflow, diversion holes 151 are evenly and equidistantly arranged in the middle of the diversion plate 15. By optimizing the airflow distribution and pressure control, the efficiency and performance of the air knife are improved. Its functions include uniformly distributing airflow, stabilizing airflow pressure, saving energy and reducing ineffective airflow loss to avoid energy waste. After the airflow enters the compression zone 12 from the air storage zone 11, it becomes a uniform airflow, so that the airflow exiting the blade nozzle 16 has the same speed, which can be used to dry precision circuit boards.

[0029] To facilitate air drying, a blade nozzle 16 is provided on the upper part of the air knife body 1, as shown in the attached figure. Figure 4As shown, the blade nozzle 16 is fixedly mounted on the upper part of the air knife body 1. To facilitate airflow, straight holes 161 and oblique holes 162 are evenly arranged on the upper part of the blade nozzle 16. The straight holes 161 and oblique holes 162 are equidistantly and evenly distributed through the upper part of the blade nozzle 16. The blade nozzle 16 has at least two rows of straight holes 161 and one row of oblique holes 162. The straight holes 161 can be used to blow out water from the small holes in the circuit board, and the oblique holes 162 can be used to dry water stains on the surface of the circuit board. This makes the air blown out by the blade nozzle 16 point-like. The combination of multiple holes can form a dense linear air curtain, which is very suitable for drying circuit boards. It can not only dry water stains on the surface of the circuit board, but also blow out water from the small holes in the circuit board, greatly improving the drying effect of the device. In order to stabilize and limit the circuit board during operation, small fins 163 are evenly arranged on both sides of the blade nozzle 16, as shown in the attached figure. Figure 1 As shown, two sets of small wings 163 are symmetrically fixed on both sides of the blade head 16. The small wings 163 on one side are evenly distributed at equal intervals. When the high-speed blowing is working, the small wings 163 are inserted into the conveyor wheel on the circuit board drying assembly line to prevent the circuit board from falling. This not only does not obstruct or affect the conveying of circuit boards and other workpieces, but also avoids the upward displacement and shaking of the circuit board caused by wind pressure, which is conducive to improving the working stability of the device.

[0030] Working principle or structural principle:

[0031] Preparation before use: Before working, check the integrity of the air knife body 1, and confirm that the air knife body 1, air duct 2, plug end seat 17, etc. are undamaged. Check whether the straight hole 161 and the oblique hole 162 are unobstructed and free of blockages or foreign objects.

[0032] Connect the air source: Use a pressure-resistant, undamaged, and sufficiently long air duct 2 to connect the air supply connection hole 18 to the compressed air system. The air source must be clean and dry to prevent moisture or impurities from entering the air knife (a filter and oil-water separator can be installed).

[0033] Installation and fixing: Use a bracket to fix the air knife body 1 according to the application scenario (horizontal / vertical direction). After installation, ensure that the air outlets of the straight hole 161 and the oblique hole 162 are at an appropriate distance from the object being treated. The closer the distance, the better the effect when drying.

[0034] Blowing Operation: When turning on the air source, slowly adjust the pressure to the working range (avoid sudden high-pressure impact). Next, observe whether the airflow is uniform and stable, and whether there is any abnormal noise. The higher the air pressure, the faster the airflow speed. Avoid excessive pressure, which can lead to increased energy consumption or excessive noise. The angle between the straight hole 161 and the angled hole 162 outlet and the object being processed should be adjusted according to the working conditions to improve efficiency. During operation monitoring, regularly check and observe the processing effect (such as dryness and cleanliness). If necessary, fine-tune the parameters. During drying, the blower enters through the air duct 2 and passes sequentially through the air storage area 11, compression area 12, and outlet area 13 inside the air knife body 1. During this process, the airflow is guided by the slot opening of the air guide seat 14, which avoids air turbulence caused by the corners of the slots inside the air knife body 1, effectively preventing high-altitude turbulence. The smooth airflow, combined with the diversion and conduction of the flow divider 15, can effectively improve the stability of the blowing airflow. The airflow is pressurized and evenly blown out at high speed from the straight hole 161 and the inclined hole 162 on the upper part of the blade part 16 after passing through the compression zone 12. The straight hole 161 is used to blow out the water in the small holes of the circuit board, and the inclined hole 162 is used to dry the water stains on the surface of the circuit board. When the high-speed blowing is working, the small fin 163 is inserted into the conveyor wheel on the circuit board drying production line to prevent the circuit board from falling. It can not only avoid obstructing the conveying of circuit boards and other workpieces, but also avoid the upward displacement and shaking of the circuit board caused by the air pressure.

[0035] In summary, this air knife, through several straight holes 161 and oblique holes 162 set on the nozzle 16, makes the air blown out by the nozzle 16 point-like. The combination of multiple holes can form a dense linear air curtain, which is very suitable for drying circuit boards. It can not only dry water stains on the surface of the circuit board, but also blow out water from the small holes in the circuit board, greatly improving the drying effect of the device. The air knife adopts an internal guide structure. An air guide slot seat 14 is set at the transition between the air storage area 11 and the compression area 12 inside the air knife body 1. The air is guided by the air guide slot. The slot guide of seat 14 can avoid air turbulence caused by the corner of the slot in the air knife body 1, which can effectively improve the smoothness of air flow. Combined with the diversion and conduction of the diversion plate 15, it can effectively improve the stability of the blowing airflow. Furthermore, a small wing 163 is provided on the edge of the blade part 16. When the high-speed blowing is working, the small wing 163 can be inserted into the conveyor wheel on the circuit board drying assembly line to prevent the circuit board from falling. It can not only avoid obstructing the conveying of circuit boards and other workpieces, but also avoid the upward displacement and shaking of the circuit board caused by wind pressure, which is conducive to improving the working stability of the device.

[0036] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A perforated air knife with protective function, comprising an air knife body (1) and an air duct (2), characterized in that: The air duct (2) is connected to the lower part of the air knife body (1). The air knife body (1) is tapered from bottom to top. The air knife body (1) is provided with an air storage area (11), a compression area (12) and an air outlet area (13) in sequence inside. The air storage area (11) and the compression area (12) are connected by an air guide seat (14). The upper part of the air guide seat (14) is provided with a flow divider (15). The upper part of the air knife body (1) is provided with a blade tip (16). The upper part of the blade tip (16) is uniformly provided with straight holes (161) and oblique holes (162). The two sides of the blade tip (16) are uniformly provided with small wings (163).

2. The air knife with a porous structure and protective function according to claim 1, characterized in that: An air supply connection hole (18) is provided through the middle of the bottom side of the air knife body (1), and the end of the air duct (2) is fixedly connected to the air supply connection hole (18).

3. The air knife with a porous structure and protective function according to claim 2, characterized in that: Both ends of the air knife body (1) are provided with end caps (17). The two sets of end caps (17) are fixedly installed on the opening sides of both ends of the air knife body (1). The end caps (17) and the mounting side of the air knife body (1) are provided with silicone gaskets.

4. The air knife with a porous structure and protective function according to claim 1, characterized in that: The air storage area (11), compression area (12) and air outlet area (13) are arranged sequentially from bottom to top on the inner cavity side of the air knife body (1), and the air storage area (11), compression area (12) and air outlet area (13) are interconnected.

5. The air knife with a porous structure and protective function according to claim 4, characterized in that: The side seat of the air guide slot (14) is fitted and supported by the groove provided on the side of the inner cavity of the air storage area (11). The bottom plate of the air guide slot (14) is provided through the air guide slot (141) in the middle. Inclined air guide plates are provided on both sides of the upper part of the air guide slot (14).

6. The air knife with a porous structure and protective function according to claim 5, characterized in that: The diverter plate (15) is located above the air guide slot seat (14). The side plate of the diverter plate (15) is fitted and supported by the groove provided on the side of the inner cavity of the compression zone (12). The diverter plate (15) has diverter holes (151) uniformly arranged at equal intervals in the middle.

7. The air knife with a porous structure and protective function according to claim 1, characterized in that: The blade tip (16) is fixedly installed on the upper part of the air knife body (1), and the straight hole (161) and the oblique hole (162) are evenly and equidistantly opened on the upper part of the blade tip (16).

8. The air knife with a porous structure and protective function according to claim 7, characterized in that: The two sets of small wings (163) are symmetrically fixed on both sides of the blade tip (16), and the small wings (163) on one side are evenly distributed and installed at equal intervals.

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