Air knife

Abstract

The utility model relates to the technical field of high-speed airflow equipment, and discloses an air knife. The air knife comprises a first plate body and a second plate body which are oppositely arranged and fixedly connected, at least one air inlet penetrating through the inner side plate face of the first plate body is formed in the outer side plate face of the first plate body, and an air outlet extending in the length direction of the first plate body and the second plate body is formed in the bottom between the first plate body and the second plate body. An air inlet groove extending in the length direction of the second plate body is formed in the inner side plate face of the second plate body, an air inlet cavity is defined between the air inlet groove and the plate face of the first plate body, the air inlet cavity is communicated with the air inlet, a strip-shaped boss smaller than the air inlet groove in depth is arranged on the lower side of the air inlet groove, and an air outlet gap is defined between the strip-shaped boss and the inner side plate face of the first plate body. An arc-shaped groove is formed in the position, located on the lower side of the strip-shaped boss, of the inner side plate face of the second plate body, and the air outlet gap communicates with the air outlet through the arc-shaped groove. The air knife can solve the problems that an existing air knife is large in size and complex in structure and does not have a continuous pressure function.

Description

Technical Field

[0001] This utility model relates to the field of high-speed airflow equipment technology, specifically to air blades. Background Technology

[0002] An air knife is a device that uses high-speed rotating airflow to generate shearing force. Its working principle can be briefly summarized as follows:

[0003] 1. High-speed rotating airflow: Driven by a motor, the air knife draws in air and passes it through specially designed blades or nozzles, generating a high-speed rotating airflow. Due to centrifugal force, this high-speed rotating airflow forms a powerful airflow jet.

[0004] 2. Airflow shearing effect: A high-speed rotating airflow stream passes through a special flow channel or nozzle outlet, forming a high-speed airflow shear boundary at the outlet. When this boundary comes into contact with the object to be treated, the high-speed rotation of the airflow generates a strong shearing force.

[0005] The working principle of an air knife is mainly to generate shearing force through high-speed rotating airflow, thereby cutting, removing, or separating objects. This working principle makes air knives widely used in many fields, such as cleaning industrial production lines, cutting electronic components, and food processing.

[0006] Currently, the air inlet pipe of commercially available air knives is connected to the edge of the air knife along its length. To maintain a certain air intake volume, the size of the air inlet pipe is fixed, which limits the width of the air knife and results in a relatively large volume. Furthermore, existing technology discloses an airflow-enhancing air knife (publication number CN 212720754 U). Although it places the air inlet on the right plate, the overall structure of the air knife is quite complex, with many components and no pressure-retaining function. Utility Model Content

[0007] In view of this, the present invention provides an air knife to solve the problems of existing air knives being large in size, complex in structure, and lacking pressure maintenance function.

[0008] This utility model provides an air knife, including a first plate and a second plate that are arranged opposite to each other and fastened together. The outer side of the first plate is provided with at least one air inlet penetrating its inner side. The bottom between the first plate and the second plate is provided with an air outlet extending along their length. The inner side of the second plate is provided with an air inlet groove extending along its length. The air inlet groove and the plate surface of the first plate define an air inlet cavity, which communicates with the air inlet. The lower side of the air inlet groove is provided with a strip-shaped protrusion with a depth smaller than the air inlet groove. The strip-shaped protrusion and the inner side of the first plate define an air outlet gap. The inner side of the second plate is provided with an arc-shaped groove below the strip-shaped protrusion. The air outlet gap communicates with the air outlet through the arc-shaped groove.

[0009] Beneficial effects: Gas enters the air inlet chamber through the air inlet of the first plate, flows through the air outlet gap between the strip-shaped protrusion and the first plate, and then flows out through the arc-shaped groove. The arc-shaped groove acts as an air storage chamber and a flow stabilizing chamber, and also has a pressurization function. By temporarily storing the gas in the arc-shaped groove before it flows out through the air outlet, the airflow becomes more stable, and there is also a pressurization effect. In addition, placing the air inlet on the surface of the first plate, compared to the previous method of placing the air inlet at the ends of two plates, allows for a thinner plate, thereby saving installation space and reducing the overall thickness and volume of the air knife.

[0010] In one specific embodiment, multiple pillars are evenly distributed on the strip-shaped protrusion, the end face of the pillar is flush with the opening of the air inlet groove, and the end face of the pillar abuts against the inner side plate surface of the first plate.

[0011] In one specific embodiment, the second plate is provided with a plurality of threaded holes arranged around the air inlet groove, the plurality of threaded holes being spaced apart, the threaded holes located on the lower side of the second plate being provided one-to-one with the column and passing through it along its axial direction, the first plate being provided with threaded holes that are provided one-to-one with the second plate, and the first plate and the second plate being fixedly connected by bolts passing through the corresponding threaded holes.

[0012] In one specific embodiment, the maximum depth of the arc-shaped groove is less than the depth of the air inlet slot but greater than the spacing of the air outlet gap.

[0013] In one specific embodiment, an air outlet groove is provided at the bottom of the first plate, the air outlet groove is connected to the bottom of the first plate, and the air outlet is defined between the air outlet groove and the second plate.

[0014] In one specific embodiment, the air outlet slot is inverted "L" shape.

[0015] In one specific embodiment, the depth of the air outlet groove is less than the spacing of the air outlet gap.

[0016] In one specific embodiment, the lengths of the strip-shaped protrusion, the arc-shaped groove, and the air outlet groove are the same as the length of the air inlet groove, and are all less than the lengths of the first plate and the second plate.

[0017] In one specific embodiment, multiple air inlets are provided, and the multiple air inlets are spaced apart on the first plate.

[0018] In one specific embodiment, the bottom of both the first plate and the second plate is provided as an inclined surface that is tilted toward the air outlet, and the inclined surfaces on both sides form a "V" shape. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a wind knife at a first angle according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A three-dimensional structural diagram of the air knife at the second angle;

[0022] Figure 3 This is a schematic diagram of the structure of the first plate in an air knife according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the second plate in an air knife according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of a pneumatic knife according to an embodiment of the present utility model;

[0025] Figure 6 for Figure 5 A side view diagram;

[0026] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. First plate; 101. Air inlet; 102. Air outlet slot; 2. Second plate; 201. Air inlet slot; 202. Strip-shaped boss; 203. Arc-shaped groove; 204. Column; 3. Threaded hole; 4. Air outlet; 5. Sloping surface. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0031] An embodiment of this utility model provides an air knife, combined with Figures 1 to 7 The system includes a first plate 1 and a second plate 2 that are arranged opposite to each other and fastened together. The outer side of the first plate 1 is provided with at least one air inlet 101 that penetrates its inner side. The bottom between the first plate 1 and the second plate 2 is provided with an air outlet 4 that extends along the length of both. The inner side of the second plate 2 is provided with an air inlet groove 201 that extends along its length. The air inlet groove 201 and the plate surface of the first plate 1 define an air inlet cavity. The air inlet cavity communicates with the air inlet 101. The lower side of the air inlet groove 201 is provided with a strip-shaped protrusion 202 that is smaller than the depth of the air inlet groove 201. The strip-shaped protrusion 202 and the inner side of the first plate 1 define an air outlet gap. The inner side of the second plate 2 is provided with an arc-shaped groove 203 located below the strip-shaped protrusion 202. The air outlet gap communicates with the air outlet 4 through the arc-shaped groove 203.

[0032] In this embodiment, the first plate 1 and the second plate 2 can both be rectangular plates of the same size. During processing, the first plate 1 and the second plate 2 are processed separately, and after processing, they are joined together and fastened together with fasteners.

[0033] The air inlet 101 and air outlet 4 can be machined on the surface (i.e., the largest surface) of the first plate 1, and the air inlet groove 201, strip-shaped boss 202, and arc-shaped groove 203 can be machined on the second plate 2. The specific machining method can be milling with a milling cutter. Since there are no other additional parts, the machining method is simple and the production cost is low.

[0034] A narrow air outlet gap is formed between the surface of the strip-shaped protrusion 202 and the inner side surface of the first plate 1. When the airflow passes through, it is compressed, which further improves the airflow velocity and uniformity.

[0035] In this embodiment, gas enters the air inlet cavity through the air inlet 101 of the first plate 1, flows through the air outlet gap between the strip-shaped protrusion 202 and the first plate 1, and then flows through the arc-shaped groove 203. The gas flows out from the air outlet 4 through the arc-shaped groove 203, forming an airflow path of double plate structure: air inlet 101 → air inlet cavity → air outlet gap → arc-shaped groove 203 → air outlet 4. The arc-shaped groove 203 acts as a gas storage chamber and a flow stabilizing chamber, and has a pressure-retaining function. It temporarily stores the gas in the arc-shaped groove 203 before it flows out from the air outlet 4, making the airflow more stable. Since the arc-shaped groove 203 can store sufficient gas, the airflow velocity increases when a large amount of gas passes through the narrow air outlet 4, resulting in a pressurization effect. At the same time, it generates a guide flow, finally forming a wind surface with increased and uniform flow velocity, which acts on the product surface, for example, to achieve efficient water removal, cleaning, or cutting functions in industrial production.

[0036] In addition, by setting the air inlet 101 on the surface of the first plate 1, compared with the previous setting the air inlet 101 at the ends of the two plates, the thickness of the plate can be made thinner, thereby saving installation space and reducing the overall thickness and volume of the air knife.

[0037] The air knife in this embodiment consists only of a first plate 1 and a second plate 2, which has a simple structure, is easy to produce and assemble, and reduces manufacturing costs.

[0038] In a specific embodiment, such as Figure 4 As shown, multiple pillars 204 are evenly distributed on the strip-shaped protrusion 202. The end faces of the pillars 204 are flush with the openings of the air inlet slots 201, and the end faces of the pillars 204 abut against the inner surface of the first plate 1. By setting the pillars 204, the overall strength of the second plate 2 and the connection strength between the first plate 1 and the second plate 2 can be enhanced. Moreover, the pillars 204 divide the air outlet gap into multiple spaced sub-air outlet gaps, which facilitates more uniform gas flow through the air outlet gaps.

[0039] In a specific embodiment, such as Figure 1As shown, the second plate 2 has multiple threaded holes 3 surrounding the air inlet slot 201. These threaded holes 3 are spaced apart. The threaded holes 3 located on the lower side of the second plate 2 are correspondingly positioned on the column 204 and pass through it along its axis. The first plate 1 has threaded holes 3 corresponding to those on the second plate 2. The first plate 1 and the second plate 2 are fixedly connected by bolts passing through the corresponding threaded holes 3. By providing threaded holes 3 on the column 204 and on the periphery of both plates, it is convenient to connect the two plates with bolts and to facilitate subsequent disassembly. The periphery of the air inlet slot 201 is relatively thick; providing threaded holes 3 in this location ensures that the structural strength of the plate is not weakened.

[0040] In one specific embodiment, the maximum depth of the arc-shaped groove 203 is less than the depth of the air inlet groove 201 but greater than the spacing of the air outlet gap. This ensures that there is sufficient space for the gas to enter the air inlet chamber, and then the gas flow rate can be increased through the narrow air outlet gap. The gas is then stored in the air storage chamber, which is acted as by the arc-shaped groove 203, to stabilize the airflow. Finally, when the gas flows out from the elongated air outlet 4, it can have a high-speed and stable airflow.

[0041] In a specific embodiment, such as Figure 3 The bottom of the first plate 1 is provided with an air outlet groove 102, which communicates with the bottom of the first plate 1. The air outlet groove 102 and the second plate 2 define the air outlet 4. The air outlet groove 102 is first set at the bottom of the first plate 1. After the first plate 1 and the second plate 2 are aligned, the air outlet groove 102 fits against the inner surface of the second plate 2 to form an air outlet. The connection between the arc-shaped groove 203 and the air outlet groove 102 further improves the stability and continuity of the airflow.

[0042] In a specific embodiment, such as Figure 6 and Figure 7 As shown, the air outlet slot 102 is inverted "L" shape. The "L" shaped air outlet slot 102 is easy to process, which is equivalent to cutting a long strip notch from the bottom of the first plate 1 upward in a direction parallel to its surface, and this notch serves as the air outlet slot 102.

[0043] In one specific embodiment, the depth of the air outlet groove 102 is less than the spacing of the air outlet gap. This setting allows the airflow velocity through the air outlet to be greater, faster, and more uniform compared to when it passes through the air outlet gap.

[0044] In one specific embodiment, the lengths of the strip-shaped protrusion 202, the arc-shaped groove 203, and the air outlet groove 102 are the same as the length of the air inlet groove 201, and all are shorter than the lengths of the first plate 1 and the second plate 2. This arrangement ensures that the airflow channel has a uniform width throughout, avoiding local turbulence or pressure loss caused by inconsistent lengths. The airflow path from the air inlet cavity → air outlet gap → arc-shaped groove 203 → air outlet 4 has a uniform cross-sectional area transition throughout, forming a stable laminar flow effect and improving the uniformity of airflow output. The strict matching of the lengths of each functional groove ensures uniform force when the first plate 1 and the second plate 2 are tightened with bolts, avoiding local deformation or air leakage caused by length deviations. This maximizes the air outlet area of ​​the entire air knife and ensures consistent airflow uniformity throughout the entire air outlet.

[0045] In one specific embodiment, multiple air inlets 101 are provided, and the multiple air inlets 101 are spaced apart on the first plate 1. Multiple spaced air inlets 101 can be provided as needed to improve the uniformity of airflow input and the overall performance of the air knife.

[0046] In a specific embodiment, such as Figure 6 and Figure 7 As shown, the bottom of both the first plate 1 and the second plate 2 is provided with inclined surfaces 5 that are tilted towards the air outlet 4, and the inclined surfaces 5 on both sides form a "V" shape. The design of the bottom inclined surface 5 not only optimizes the airflow guidance, but also reduces the friction between the air knife and the working surface, and can quickly determine the side where the air knife's air outlet is located.

[0047] In addition, by adjusting the dimensions of components such as the air inlet slot 201 and the air outlet slot 102, it is possible to flexibly adapt to tasks with different power and airflow requirements.

[0048] The air knife in this embodiment significantly improves airflow stability, pressurization effect, and space utilization through the pressure-retaining function of the arc-shaped groove 203, the simplified structure of the double-plate body, and the improved position of the air inlet 101. At the same time, the modular design and the configuration of multiple air inlets 101 further enhance its practicality and applicability, making it superior to existing technologies in terms of performance, cost, and adaptability.

[0049] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A pneumatic blade, characterized in that, The system includes a first plate (1) and a second plate (2) that are positioned opposite to each other and fastened together. The outer surface of the first plate (1) has at least one air inlet (101) penetrating its inner surface. An air outlet (4) extending along the length of the first plate (1) and the second plate (2) is located at the bottom between them. The inner surface of the second plate (2) has an air inlet groove (201) extending along its length. The air inlet groove (201) and the surface of the first plate (1) define a space between them. An air inlet cavity is connected to the air inlet (101). The lower side of the air inlet groove (201) is provided with a strip-shaped protrusion (202) with a depth smaller than that of the air inlet groove (201). The strip-shaped protrusion (202) and the inner side of the first plate (1) define an air outlet gap. The inner side of the second plate (2) is provided with an arc-shaped groove (203) located below the strip-shaped protrusion (202). The air outlet gap is connected to the air outlet (4) through the arc-shaped groove (203).

2. The air knife according to claim 1, characterized in that, The strip-shaped boss (202) is evenly distributed with multiple columns (204), the end face of the column (204) is flush with the opening of the air inlet groove (201), and the end face of the column (204) abuts against the inner side plate surface of the first plate (1).

3. The air knife according to claim 2, characterized in that, The second plate (2) is provided with a plurality of threaded holes (3) arranged around the air inlet groove (201). The plurality of threaded holes (3) are spaced apart. The threaded holes (3) located on the lower side of the second plate (2) are respectively arranged on the column (204) and pass through it along its axial direction. The first plate (1) is provided with threaded holes (3) that are respectively arranged on the second plate (2). The first plate (1) and the second plate (2) are fixedly connected by bolts passing through the corresponding threaded holes (3).

4. The air knife according to claim 1, characterized in that, The maximum depth of the arc-shaped groove (203) is less than the depth of the air inlet groove (201) and greater than the spacing of the air outlet gap.

5. The air knife according to claim 1, characterized in that, The bottom of the first plate (1) is provided with an air outlet groove (102), which is connected to the bottom of the first plate (1), and the air outlet (4) is defined between the air outlet groove (102) and the second plate (2).

6. The air knife according to claim 5, characterized in that, The air outlet slot (102) is in the shape of an inverted "L".

7. The air knife according to claim 5, characterized in that, The depth of the air outlet groove (102) is less than the spacing of the air outlet gap.

8. The air knife according to claim 5, characterized in that, The lengths of the strip-shaped protrusion (202), the arc-shaped groove (203), and the air outlet groove (102) are the same as the length of the air inlet groove (201), and are all less than the lengths of the first plate (1) and the second plate (2).

9. The air knife according to any one of claims 1-8, characterized in that, The air inlets (101) are provided in multiple locations, and the multiple air inlets (101) are spaced apart on the first plate (1).

10. The air knife according to any one of claims 1-8, characterized in that, The bottom of the first plate (1) and the second plate (2) are both provided with inclined surfaces (5) that are inclined toward the air outlet (4), and the inclined surfaces (5) on both sides form a "V" shape.

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