A wind knife for photovoltaic welding ribbon

Abstract

The present invention discloses an air knife for photovoltaic welding ribbon, which relates to the technical field of air knives and comprises an upper shell and a lower shell, wherein a mold hole for passing the welding ribbon is arranged at the concentric position of the upper shell and the lower shell, and a cavity for gas circulation is formed after the upper shell and the lower shell are connected, and an air blowing port is formed at the mold hole of the upper shell and the lower shell, and the cavity comprises a horizontal section, a vertical section, and an oblique section, and the side wall of the lower shell is equally divided and provided with at least two air inlets connected with the horizontal section, and a fixed first flow stabilizing plate and a movable second flow stabilizing plate are arranged in sequence from bottom to top in the vertical section; through the cooperation of structures such as stage columns and elastic parts, when the flow rate of the incoming air flow increases, the flow rate can be reduced by controlling the gap between the vent and the stage column to become larger, so as to balance the incoming gas flow rate, make the air flow rate stable, ensure the qualified rate of the product, and the service life of the elastic part is longer than that of the silicone layer, thereby reducing the number of maintenance times.

Description

Technical Field

[0001] The present invention relates to the technical field of air knives, in particular to an air knife for photovoltaic welding ribbons. Background Art

[0002] The wind knife is used for photovoltaic welding ribbons, which are the busbars on photovoltaic panels. The flat copper ribbon is coated with a solder layer. During the preparation of photovoltaic welding ribbons, the high-temperature welding ribbon needs to be immersed in water for annealing. After the photovoltaic welding ribbon leaves the water, there will be a certain amount of water on the surface. The water is blown away from the welding ribbon by the wind knife to ensure that the welding ribbon is dry.

[0003] Existing Chinese patent CN 114086099 B is a circular air knife for high concentricity. This patent uses a silicone layer to open when pressure is applied and close when pressure is insufficient. However, when the airflow is unstable, especially when the airflow suddenly increases, the silicone layer remains open, thereby increasing the airflow velocity from the air outlet to the solder ribbon, causing the coated solder layer to loosen and affecting the product qualification rate. Summary of the Invention

[0004] The object of the present invention is to provide an air knife for photovoltaic welding ribbon to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a wind knife for photovoltaic welding ribbon, comprising an upper shell and a lower shell, wherein a mold hole for passing through the welding ribbon is provided at the concentric point of the upper shell and the lower shell, and a cavity for gas circulation is formed after the upper shell and the lower shell are connected, and an air blowing port is formed at the mold hole of the upper shell and the lower shell, and the cavity comprises a horizontal section, a vertical section, and an oblique section, and the side wall of the lower shell is equally divided and provided with at least two air inlets connected to the horizontal section, and a fixed first flow stabilizing plate and a second flow stabilizing plate are provided in sequence from bottom to top in the vertical section. A movable second flow stabilizer, a plurality of flow stabilizer holes are arranged on the first flow stabilizer, a plurality of vents are arranged on the second flow stabilizer, the flow stabilizer holes of the first flow stabilizer and the vents of the second flow stabilizer are staggered, a stage column is arranged on the second flow stabilizer and passes through the vents and is vertically fixed to the first flow stabilizer, the stage column is a combination of multiple concentric cylinders, the diameters of the concentric cylinders decrease from top to bottom, the outer diameter of the top cylinder is the same as the inner diameter of the vent, and an elastic member is provided between the first flow stabilizer and the second flow stabilizer to lift the second flow stabilizer.

[0006] As a preferred solution for the air knife for photovoltaic welding ribbons of the present invention, the upper shell and the lower shell are threadedly connected, the threaded section of the lower shell is larger than the threaded section of the upper shell, a fastening groove is opened in the middle of the threaded section of the upper shell, the height of the threaded section of the lower shell minus the height of the threaded section of the upper shell is equal to the height of the fastening groove, and the side wall of the lower shell is threadedly connected to a plurality of fastening bolts fastened to the fastening groove.

[0007] As a preferred solution of the wind knife for photovoltaic welding ribbon of the present invention, a plurality of protrusions are symmetrically arranged on the top of the upper shell.

[0008] As a preferred solution for the wind knife for photovoltaic welding strips of the present invention, wherein: the bottom end of the upper shell is vertically fixed with a diverter plate, the side wall of the upper shell is fixed with a limit block at the same height as the bottom end of the diverter plate, and the bottom ends of the diverter plate and the limit block are in circular contact with the second flow stabilizing plate and do not hinder the stage column.

[0009] As a preferred solution of the wind knife for photovoltaic welding ribbon of the present invention, the diverter plate is in an arc-shaped triangular structure, and its tip is located in the middle of the air inlet.

[0010] As a preferred solution of the wind knife for photovoltaic welding ribbon of the present invention, a limiting hole is opened on the top of the vent, a limiting column adapted to the limiting hole is set on the top of the stage column, and the bottom of the stage column is threadedly connected to the first flow stabilizing plate.

[0011] As a preferred solution of the wind knife for photovoltaic welding ribbon of the present invention, the elastic member is arranged on the side wall of the upper shell or the side wall of the lower shell.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are: through the coordination of structures such as the stage column and the elastic part, when the incoming air flow velocity increases, the flow velocity can be reduced by controlling the gap between the vent and the stage column to become larger, thereby balancing the incoming gas flow velocity, making the air flow velocity stable, ensuring the product qualification rate, and the service life of the elastic part is longer than that of the silicone layer, reducing the number of maintenance times. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a front view of an air knife for photovoltaic ribbon welding according to the present invention;

[0015] Figure 2 This is a partial view of an air knife for photovoltaic ribbon welding according to the present invention;

[0016] Figure 3 This is a schematic diagram of the installation structure of an air knife stage column for photovoltaic ribbon welding of the present invention;

[0017] Figure 4 It is a top view of an air knife for photovoltaic welding ribbon of the present invention.

[0018] In the accompanying drawings:

[0019] 1. Upper shell; 2. Lower shell; 3. Air outlet; 4. Horizontal section; 5. Vertical section; 6. Oblique section; 7. Air inlet; 8. Fastening bolts; 9. Fastening groove; 10. Bump; 11. First flow stabilizer; 12. Second flow stabilizer; 13. Ventilation port; 14. Stage column; 15. Elastic part; 16. Limit block; 17. Diverter plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 4 , the present invention provides a technical solution: a wind knife for photovoltaic welding ribbon, comprising an upper shell 1 and a lower shell 2, a mold hole for passing through the welding ribbon is arranged at the concentric point of the upper shell 1 and the lower shell 2, a cavity for gas circulation is formed after the upper shell 1 and the lower shell 2 are connected, and a blowing port 3 is formed at the mold hole of the upper shell 1 and the lower shell 2, the cavity comprises a horizontal section 4, a vertical section 5, and an oblique section 6, at least two air inlets 7 connected to the horizontal section 4 are equally divided on the side wall of the lower shell 2, a fixed first flow stabilizing plate 11 and a movable second flow stabilizing plate 12 are arranged in sequence from bottom to top in the vertical section 5, a plurality of flow stabilizing holes are arranged on the first flow stabilizing plate 11, a plurality of vents 13 are arranged on the second flow stabilizing plate 12, the flow stabilizing holes of the first flow stabilizing plate 11 and the vents of the second flow stabilizing plate 12 The air outlets 13 are staggered, and the airflow is combed twice through the flow stabilizing holes and the vents 13 to make the airflow more stable. A stage column 14 is provided on the second flow stabilizing plate 12, which passes through the vents 13 and is vertically fixed to the first flow stabilizing plate 11. The stage column 14 is a combination of multiple concentric cylinders, and the diameters of the concentric cylinders decrease from top to bottom. The outer diameter of the top cylinder is the same as the inner diameter of the vents 13. When the gas pressure is insufficient, the vents 13 are closed. When the gas pressure is reached, the vents 13 are opened. When the gas pressure continues to increase, the flow rate of the airflow entering the vents 13 decreases. An elastic member 15 is provided between the first flow stabilizing plate 11 and the second flow stabilizing plate 12 to lift the second flow stabilizing plate 12. It is recommended that the elastic member 15 be a stainless steel spring.

[0022] When in use, the air flow enters from the air inlet 7 and then enters the horizontal section 4. When the air pressure is sufficient, it pushes the second flow stabilizer 12 in the vertical section 5 to move downward, squeezing the elastic part 15, so that the uppermost cylinder of the stage column 14 is completely exposed from the vent 13, thereby opening the vent 13, and the air flow enters from the vent 13, then enters the oblique section 6 through the flow stabilizing hole, and finally blows out from the blowing port 3. When the air flow suddenly becomes larger, the air pressure in the horizontal section 4 will continue to increase, thereby pushing the second flow stabilizer 12 to continue to move downward, exposing the cylinder below the stage column 14. Since the diameter of the lower cylinder is smaller than the diameter of the upper cylinder, the gap between the vent 13 and the cylinder becomes larger, so the air flow velocity through the vent 13 is reduced, thereby offsetting the impact of the sudden increase in air flow, stabilizing the flow velocity of the air flow, and making the air flow blown out of the blowing port 3 more stable.

[0023] See also Figure 1 The upper shell 1 and the lower shell 2 are threadedly connected. The threaded section of the lower shell 2 is larger than the threaded section of the upper shell 1. The height position of the upper shell 1 in the lower shell 2 can be changed. A fastening groove 9 is opened in the middle of the threaded section of the upper shell 1. The height of the threaded section of the lower shell 2 minus the height of the threaded section of the upper shell 1 is equal to the height of the fastening groove 9. The side wall of the lower shell 2 is threadedly connected to a number of fastening bolts 8 that are fastened to the fastening groove 9.

[0024] When in use, first loosen the fastening bolt 8, then rotate the upper shell 1 to make the upper shell 1 move up and down on the lower shell 2. When the upper shell 1 reaches the appropriate position, tighten the fastening bolt 8. The fastening bolt 8 enters the fastening groove 9, which can prevent the fastening bolt 8 from directly contacting the side wall of the upper shell 1, causing the upper shell 1 to deform, thereby destroying the sealing effect, thereby changing the gap of the air outlet 3, and changing the air flow rate on the air outlet 3. The flow rate of the air outlet 3 can be changed without changing the incoming air flow, so as to achieve the purpose of adjusting the flow rate of the air outlet 3, to adapt to the requirements of different welding strips for different air flow rates.

[0025] See also Figure 1 and Figure 4 A plurality of protrusions 10 are symmetrically arranged on the top of the upper shell 1 , and the use of the protrusions 10 facilitates the rotation of the upper shell 1 .

[0026] See also Figure 1 and Figure 2 The diverter plate 17 is fixed vertically at the bottom of the upper shell 1, and the limit block 16 is fixed on the side wall of the upper shell 1 at the same height as the bottom of the diverter plate 17. The bottom ends of the diverter plate 17 and the limit block 16 are in circumferential contact with the second flow stabilizing plate 12 and do not hinder the stage column 14.

[0027] When the upper shell 1 moves downward, the diverter plate 17 and the limit block 16 are driven downward at the same time. The downward movement of the diverter plate 17 and the limit block 16 drives the second flow stabilizer 12 to move downward as well. The vent 13 can be opened and the flow rate entering the vent 13 can be changed without changing the airflow to meet the needs of different users.

[0028] See also Figure 2 The diverter plate 17 is an arc-shaped triangular structure, with its tip located in the middle of the air inlet 7, which smoothly guides the airflow entering the air inlet 7 to both sides.

[0029] Among them, a limiting hole is opened at the top of the vent 13, and a limiting column adapted to the limiting hole is set at the top of the stage column 14, and the bottom of the stage column 14 is threadedly connected to the first flow stabilizing plate 11. Through the cooperation of the limiting column and the limiting hole, the stage column 14 can limit the height of the second flow stabilizing plate 12. The threaded connection can facilitate the removal and installation of the stage column 14 and facilitate maintenance.

[0030] See also Figure 2 and Figure 4 The elastic member 15 is arranged on the side wall of the upper shell 1 or the side wall of the lower shell 2, which can prevent the elastic member 15 from affecting the entry of the airflow into the flow stabilization hole and the vent 13.

[0031] It is important to note that the construction and arrangement of the present application, as illustrated in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. All such modifications are therefore intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0032] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0033] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wind knife for photovoltaic welding ribbon, comprising an upper shell (1) and a lower shell (2), wherein a mold hole for passing the welding ribbon is provided at the concentric point of the upper shell (1) and the lower shell (2), and a cavity for gas circulation is formed after the upper shell (1) and the lower shell (2) are connected, and an air outlet (3) is formed at the mold hole of the upper shell (1) and the lower shell (2), and the cavity comprises a horizontal section (4), a vertical section (5), and an oblique section (6), and the side wall of the lower shell (2) is equally divided and provided with at least two air inlets (7) connected to the horizontal section (4), characterized in that: A fixed first flow stabilizing plate (11) and a movable second flow stabilizing plate (12) are sequentially arranged in the vertical section (5) from bottom to top, a plurality of flow stabilizing holes are arranged on the first flow stabilizing plate (11), and a plurality of vents (13) are arranged on the second flow stabilizing plate (12), the flow stabilizing holes of the first flow stabilizing plate (11) and the vents (13) of the second flow stabilizing plate (12) are arranged alternately, a stage column (14) is arranged on the second flow stabilizing plate (12) and passes through the vents (13) and is vertically fixed to the first flow stabilizing plate (11), the stage column (14) is a combination of multiple concentric cylinders, the diameters of the concentric cylinders decrease from top to bottom, the outer diameter of the uppermost cylinder is the same as the inner diameter of the vents (13), and an elastic member (15) is arranged between the first flow stabilizing plate (11) and the second flow stabilizing plate (12) to lift the second flow stabilizing plate (12).

2. The air knife for photovoltaic ribbon welding according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are threadedly connected, the threaded section of the lower shell (2) is larger than the threaded section of the upper shell (1), a fastening groove (9) is provided in the middle of the threaded section of the upper shell (1), the height of the threaded section of the lower shell (2) minus the height of the threaded section of the upper shell (1) is equal to the height of the fastening groove (9), and the side wall of the lower shell (2) is threadedly connected to a plurality of fastening bolts (8) fastened to the fastening groove (9).

3. The air knife for photovoltaic ribbon welding according to claim 2, characterized in that: A plurality of protrusions (10) are symmetrically arranged on the top of the upper shell (1).

4. The air knife for photovoltaic ribbon welding according to claim 2, characterized in that: A diverter plate (17) is vertically fixed to the bottom of the upper shell (1), and a limit block (16) is fixed to the side wall of the upper shell (1) at the same height as the bottom of the diverter plate (17). The bottom ends of the diverter plate (17) and the limit block (16) are in circumferential contact with the second flow stabilizing plate (12) and do not obstruct the stage column (14).

5. The air knife for photovoltaic ribbon welding according to claim 4, characterized in that: The diverter plate (17) has an arc-shaped triangular structure, with its tip located in the middle of the air inlet (7).

6. The air knife for photovoltaic ribbon welding according to claim 1, characterized in that: A limiting hole is provided at the top of the vent (13), a limiting column adapted to the limiting hole is provided at the top of the stage column (14), and a threaded connection is formed between the bottom of the stage column (14) and the first flow stabilizing plate (11).

7. The air knife for photovoltaic ribbon welding according to claim 1, characterized in that: The elastic member (15) is arranged on the side wall of the upper shell (1) or the side wall of the lower shell (2).

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