Air knife

Abstract

The invention 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 problems that an existing air knife is large in size and complex in structure and does not have a continuous pressure function can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed air flow equipment, and specifically relates to an air knife. Background Art

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

[0003] 1. High-speed rotating air flow: The air knife is driven by a motor to suck in air and pass it through specially designed fan blades or nozzles, causing the air to generate a high-speed rotating air flow. Due to the centrifugal force, the high-speed rotating air flow forms a strong air flow beam.

[0004] 2. Shearing action of the air flow beam: The high-speed rotating air flow beam passes through a special flow channel or the outlet of a nozzle, forming a high-speed air flow shearing boundary at the outlet. When this boundary contacts the object to be processed, due to the high-speed rotating characteristics of the air flow, a strong shearing force is generated.

[0005] The working principle of the air knife mainly generates a shearing force through a high-speed rotating air flow, thereby realizing the cutting, cleaning, or separation of objects. This working principle enables the air knife to have a wide range of applications in multiple fields, such as the cleaning of industrial production lines, the cutting of electronic parts, and food processing.

[0006] Currently, the air inlet pipe of the air knife on the market is connected to the edge of the air knife along the length direction. When maintaining a certain air intake volume, with a certain size of the air inlet pipe, the width of the air knife cannot be made too small, resulting in a relatively large volume. In addition, the prior art also discloses an air flow-increasing air knife with a publication number of CN 212720754 U. Although the air inlet is arranged on the right plate for air intake, the overall structure of the air knife is relatively complex, with many components and no continuous pressure function. Summary of the Invention

[0007] In view of this, the present invention provides an air knife to solve the problems of the existing air knife having a large volume, a complex structure, and no continuous pressure function.

[0008] The present invention provides an air knife, which includes a first plate body and a second plate body that are oppositely arranged and tightly connected. At least one air inlet penetrating through the inner plate surface is provided on the outer plate surface of the first plate body. An air outlet extending along the length direction of the two is provided at the bottom between the first plate body and the second plate body. An air inlet groove extending along the length direction of the second plate body is formed on the inner plate surface of the second plate body. An air inlet cavity is defined between the air inlet groove and the plate surface of the first plate body. The air inlet cavity is communicated with the air inlet. A strip-shaped boss smaller than the depth of the air inlet groove is provided on the lower side of the air inlet groove. An air outlet gap is defined between the strip-shaped boss and the inner plate surface of the first plate body. An arc-shaped groove is provided on the inner plate surface of the second plate body below the strip-shaped boss. The air outlet gap is communicated with the air outlet through the arc-shaped groove.

[0009] Beneficial effects: The gas enters the air inlet cavity from the air inlet of the first plate body, accelerates after passing through the air outlet gap between the strip-shaped boss and the first plate body, and flows through the arc-shaped groove. The gas flows out from the air outlet through the arc-shaped groove. The arc-shaped groove functions as a gas storage chamber and a flow stabilizing chamber and has a pressure maintaining function. The gas is temporarily stored in the arc-shaped groove and then flows out from the air outlet, making the air flow out more stable and having a pressurizing effect. In addition, by arranging the air inlet on the plate surface of the first plate body, compared with the conventional method of arranging the air inlet at the ends of the two plate bodies, the thickness of the plate can be made thinner, thereby saving the installation space and reducing the overall thickness and volume of the air knife.

[0010] In a specific embodiment, a plurality of columns are evenly distributed on the strip-shaped boss. The end surface of the column is flush with the notch of the air inlet groove, and the end surface of the column abuts against the inner plate surface of the first plate body.

[0011] In a specific embodiment, the second plate body is provided with a plurality of threaded holes arranged around the air inlet groove. The plurality of threaded holes are spaced apart. The threaded holes located on the lower side of the second plate body are correspondingly arranged on the columns and penetrate along their axial directions. The first plate body is provided with threaded holes corresponding to the second plate body. The first plate body and the second plate body are fixedly connected by bolts passing through the corresponding threaded holes.

[0012] In a specific embodiment, the maximum depth of the arc-shaped groove is less than the depth of the air inlet groove and greater than the distance of the air outlet gap.

[0013] In a specific embodiment, an air outlet groove is formed at the bottom of the first plate body. The air outlet groove is communicated with the bottom of the first plate body. The air outlet is defined between the air outlet groove and the second plate body.

[0014] In a specific embodiment, the air outlet groove is in an inverted "L" shape.

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

[0016] In a specific embodiment, the lengths of the strip-shaped convex platform, 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 body and the second plate body.

[0017] In a specific embodiment, a plurality of air inlets are provided, and the plurality of air inlets are spaced apart on the first plate body.

[0018] In a specific embodiment, the bottoms of the first plate body and the second plate body are both provided with inclined surfaces that are inclined towards the air outlet, and the inclined surfaces on both sides form a "V" shape. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structure schematic diagram of a first angle of an air knife according to an embodiment of the present invention;

[0021] Figure 2 It is Figure 1 a three-dimensional structure schematic diagram of a second angle of the air knife shown;

[0022] Figure 3 It is a structure schematic diagram of a first plate body in an air knife according to an embodiment of the present invention;

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

[0024] Figure 5 It is a cross-sectional structure schematic diagram of an air knife according to an embodiment of the present invention;

[0025] Figure 6 It is Figure 5 a side view schematic diagram;

[0026] Figure 7 It is Figure 6 an enlarged schematic diagram at A in;

[0027] Description of the Reference Numerals:

[0028] 1. First plate body; 101. Air inlet; 102. Air outlet groove; 2. Second plate body; 201. Air inlet groove; 202. Strip-shaped boss; 203. Arc-shaped groove; 204. Cylinder; 3. Threaded hole; 4. Air outlet; 5. Inclined surface. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

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

[0031] An embodiment of the present invention provides an air knife, in combination with Figures 1 to 7 , including a first plate body 1 and a second plate body 2 that are oppositely arranged and tightly connected. At least one air inlet 101 penetrating through the inner side plate surface is provided on the outer side plate surface of the first plate body 1. An air outlet 4 extending along the length direction of the two is provided at the bottom between the first plate body 1 and the second plate body 2. An air inlet groove 201 extending along the length direction of the second plate body 2 is formed on the inner side plate surface of the second plate body 2. An air inlet cavity is defined between the air inlet groove 201 and the plate surface of the first plate body 1. The air inlet cavity is communicated with the air inlet 101. A strip-shaped boss 202 smaller than the depth of the air inlet groove 201 is provided on the lower side of the air inlet groove 201. An air outlet gap is defined between the strip-shaped boss 202 and the inner side plate surface of the first plate body 1. An arc-shaped groove 203 is provided on the inner side plate surface of the second plate body 2 below the strip-shaped boss 202. The air outlet gap is communicated with the air outlet 4 through the arc-shaped groove 203.

[0032] In this embodiment, the first plate body 1 and the second plate body 2 can both be rectangular plate bodies of the same size. During processing, the first plate body 1 and the second plate body 2 are processed separately and then combined and tightly connected together by fasteners.

[0033] The air inlet 101 and the air outlet 4 can be processed on the plate surface (i.e., the largest surface) of the first plate body 1 first, and the air inlet groove 201, the strip-shaped boss 202, and the arc-shaped groove 203 can be processed on the second plate body 2. The specific processing method can adopt milling cutter cutting. Since there are no other additional parts, the processing method is simple and the production cost is low. Since the air outlet extends along the length direction of the air knife, a large air outlet area can be ensured, which is convenient for improving the purging efficiency.

[0034] A long and narrow air outlet gap is formed between the surface of the strip-shaped boss 202 and the inner plate surface of the first plate body 1. When the air flow passes through, it is compressed, further improving the flow velocity and uniformity of the air flow.

[0035] In this embodiment, the gas enters the air inlet cavity from the air inlet 101 of the first plate body 1, increases its speed after passing through the air outlet gap between the strip-shaped boss 202 and the first plate body 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 air flow path of a double-plate structure: air inlet 101 → air inlet cavity → air outlet gap → arc-shaped groove 203 → air outlet 4. The arc-shaped groove 203 functions as a gas storage chamber and a flow stabilizing chamber. Since the gas flows from the narrow air outlet gap through the arc-shaped groove 203 with a larger space and then through the narrow air outlet 4, part of the gas will be stored in the arc-shaped groove 203. The arc-shaped groove 203 provides a continuous pressure for the stable air supply at the air outlet 4, temporarily stores the gas in the arc-shaped groove 203 and then flows out from the air outlet 4, making the air flow out more stable and uniform. Since sufficient gas can be stored in the arc-shaped groove 203, when a large amount of gas passes through the narrow air outlet 4, the air flow velocity increases, achieving a pressure boosting effect. At the same time, it generates a guiding effect, and finally forms a wind surface with an increased and uniform flow velocity, acting on the product surface, such as realizing efficient water drainage, cleaning or cutting functions in industrial production.

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

[0037] The air knife of this embodiment is only composed of the first plate body 1 and the second plate body 2, with a simple structure, easy to produce and assemble, and reducing the manufacturing cost.

[0038] In a specific embodiment, as Figure 4 shown, a plurality of columns 204 are evenly distributed on the strip-shaped boss 202. The end surface of the column 204 is flush with the notch of the air inlet groove 201, and the end surface of the column 204 abuts against the inner plate surface of the first plate body 1. By setting the columns 204, the overall strength of the second plate body 2 can be enhanced, and the connection strength between the first plate body 1 and the second plate body 2 can also be enhanced. Moreover, the columns 204 divide the air outlet gap into multiple spaced sub-air outlet gaps, which is beneficial for the gas to pass through the air outlet gap more evenly.

[0039] In a specific embodiment, as Figure 1As shown, the second plate body 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 body 2 are correspondingly arranged on the column body 204 one by one and penetrate along its axial direction. The first plate body 1 is provided with threaded holes 3 correspondingly arranged with the second plate body 2. The first plate body 1 and the second plate body 2 are fixedly connected by bolts passing through the corresponding threaded holes 3. By providing threaded holes 3 on the column body 204 and on the circumferences of the two plate bodies, it is convenient to connect the two plate bodies by bolts and also convenient for subsequent disassembly. The thickness of the circumference of the air inlet groove 201 is relatively large. By providing threaded holes 3 here, the structural strength of the plate body can be ensured not to be weakened.

[0040] In a specific embodiment, 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. This can ensure that there is enough space after the gas enters the air inlet chamber, and then the gas velocity can be increased by passing through the narrow air outlet gap, and then stored in the air storage chamber formed by the arc-shaped groove 203 to stabilize the air flow, so that when finally flowing out from the slender air outlet 4, it can have a high-speed and stable air flow.

[0041] In a specific embodiment, as Figure 3 , an air outlet groove 102 is formed at the bottom of the first plate body 1. The air outlet groove 102 is communicated with the bottom of the first plate body 1. The air outlet 4 is defined between the air outlet groove 102 and the second plate body 2. First, the air outlet groove 102 is provided at the bottom of the first plate body 1. After the first plate body 1 and the second plate body 2 are joined together, the air outlet groove 102 is attached to the inner plate surface of the second plate body 2 to form an air outlet. The communication design between the arc-shaped groove 203 and the air outlet groove 102 further improves the stability and continuity of the air flow.

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

[0043] In a specific embodiment, the groove depth of the air outlet groove 102 is less than the spacing of the air outlet gap. Such a setting can make the air flow velocity passing through the air outlet greater, faster, and more uniform than that passing through the air outlet gap.

[0044] In a specific embodiment, the lengths of the strip-shaped convex platforms 202, the arc-shaped grooves 203, and the air outlet grooves 102 are the same as the length of the air inlet groove 201, and are all smaller than the lengths of the first plate body 1 and the second plate body 2. Such a setting ensures an equal-width design throughout the air flow channel, avoiding local turbulence or pressure loss caused by inconsistent lengths. In the path of the air flow from the air inlet cavity → the air outlet gap → the arc-shaped groove 203 → the air outlet 4, the cross-sectional area is uniformly transitioned throughout the process, forming a stable laminar flow effect and improving the uniformity of the air flow output. The lengths of the functional grooves are strictly matched, so that when the first plate body 1 and the second plate body 2 are fastened by bolts, the force is evenly distributed, avoiding local deformation or air leakage caused by length deviation. This maximizes the air outlet area of the entire air knife, and the air outlet uniformity of the entire air outlet is consistent.

[0045] In a specific embodiment, a plurality of air inlets 101 are provided, and the plurality of air inlets 101 are spaced apart on the first plate body 1. A plurality of spaced-apart air inlets 101 can be set according to requirements, improving the uniformity of air flow input and the overall performance of the air knife.

[0046] In a specific embodiment, as Figure 6 and Figure 7 shown, the bottoms of the first plate body 1 and the second plate body 2 are both provided with inclined surfaces 5 that are inclined 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 air flow direction, but also reduces the friction between the air knife and the working surface, and can quickly determine the side where the air outlet of the air knife is located.

[0047] In addition, by adjusting the dimensions of components such as the air inlet groove 201 and the air outlet groove 102, it can be flexibly adapted to tasks with different power and air flow requirements.

[0048] The air knife of this embodiment significantly improves the air flow stability, pressure boosting effect, and space utilization rate of the air knife through the continuous pressure function of the arc-shaped groove 203, the simplified structure of the double plate body, and the improvement of the position of the air inlet 101. At the same time, the modular design and the configuration of multiple air inlets 101 further enhance the practicability and scope of application, making it superior to the prior art in terms of performance, cost, and adaptability.

[0049] Although the 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 such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An air knife, characterized in that, It includes a first plate body (1) and a second plate body (2) which are oppositely arranged and fixedly connected. At least one air inlet (101) penetrating through the inner plate surface is provided on the outer plate surface of the first plate body (1). An air outlet (4) extending along the length direction of the two is provided at the bottom between the first plate body (1) and the second plate body (2). An air inlet groove (201) extending along the length direction of the second plate body (2) is formed on the inner plate surface of the second plate body (2). An air inlet cavity is defined between the air inlet groove (201) and the plate surface of the first plate body (1), and the air inlet cavity is communicated with the air inlet (101). A strip-shaped convex platform (202) with a depth smaller than that of the air inlet groove (201) is provided on the lower side of the air inlet groove (201). An air outlet gap is defined between the strip-shaped convex platform (202) and the inner plate surface of the first plate body (1). An arc-shaped groove (203) is provided on the inner plate surface of the second plate body (2) below the strip-shaped convex platform (202). The air outlet gap is communicated with the air outlet (4) through the arc-shaped groove (203).

2. The air knife according to claim 1, characterized in that, A plurality of columns (204) are evenly distributed on the strip-shaped convex platform (202). The end face of the column (204) is flush with the notch of the air inlet groove (201), and the end face of the column (204) abuts against the inner plate surface of the first plate body (1).

3. The air knife according to claim 2, wherein, The second plate body (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 body (2) are correspondingly arranged on the columns (204) one by one and penetrate along their axial directions. The first plate body (1) is provided with threaded holes (3) corresponding to the second plate body (2). The first plate body (1) and the second plate body (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 smaller than the depth of the air inlet groove (201) and larger than the spacing of the air outlet gap.

5. The air knife according to claim 1, characterized in that, An air outlet groove (102) is formed at the bottom of the first plate body (1). The air outlet groove (102) is communicated with the bottom of the first plate body (1). The air outlet (4) is defined between the air outlet groove (102) and the second plate body (2).

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

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

8. The air knife according to claim 5, wherein The lengths of the strip-shaped convex platform (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 smaller than the lengths of the first plate body (1) and the second plate body (2).

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

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

Images