Annealing device of photovoltaic welding strip

Abstract

The utility model relates to the field of photovoltaic welding strip processing, and discloses a photovoltaic welding strip annealing device which comprises a mounting frame, the mounting frame is fixed on the front side of an annealing water tank, a single-chip microcomputer is fixed on the top surface of the annealing water tank, an annealing pipe is fixed on the top surface of the mounting frame, a feeding port is formed in the top surface of the annealing water tank, and a discharging port is formed in the top surface of the annealing water tank. An L-shaped pipe is fixed to the top face of the annealing water tank, a flow guide plate is fixed to the inner wall of the L-shaped pipe, and the top face and the bottom face of the L-shaped pipe are each provided with two mounting holes. According to the utility model, through the cooperation of the heating sheet, the first temperature display, the air cooler and the second temperature display, the precise temperature control, uniform heating and segmented cooling of the photovoltaic welding strip in the annealing process are realized, so that the working personnel can accurately control the temperature of the photovoltaic welding strip according to the annealing requirement of the photovoltaic welding strip. And the temperatures in the heat preservation cavity and the pre-cooling cavity are displayed through the first temperature display and the second temperature display for flexible adjustment, so that the annealing efficiency and quality of the photovoltaic welding strip are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of photovoltaic welding strip processing, and particularly relates to an annealing device for photovoltaic welding strip. BACKGROUND

[0002] Welding strip is an important raw material in the welding process of photovoltaic modules, and the quality of the welding strip will directly affect the current collection efficiency of the photovoltaic module and greatly affect the power of the photovoltaic module. In the production process of the welding strip, the annealing process is a heat treatment process that heats the copper wire to a certain temperature according to the process requirements, keeps it for a period of time, and then cools it according to the appropriate speed to change the structure and properties of the copper wire. The purpose is to soften the copper wire, improve the plasticity and toughness, homogenize the chemical composition, remove internal residual stress, reduce the yield of the welding strip, improve the welding tension, and prolong the service life of the welding strip.

[0003] A photovoltaic welding strip annealing device is disclosed in Chinese Patent No. CN221344622U, which relates to the technical field of photovoltaic welding strip. It includes an annealing assembly and a stabilizing assembly. The annealing assembly includes an annealing water tank, an annealing wheel, and a nitrogen glass tube. The annealing wheel is installed on the inside of the annealing water tank and guides the welding strip. The nitrogen glass tube is installed on the welding strip and is fixedly connected to the top wall of the annealing water tank. The stabilizing assembly is installed on the welding strip to tension the welding strip.

[0004] In the above scheme, the first spring and the second spring can tension the welding strip in two directions by the guide cylinder, which can prevent the position of the welding strip from changing when it is tensioned with the nitrogen glass tube. However, it has the following disadvantages: when the welding strip is annealed, the heated welding strip is directly transferred to the annealing water tank for direct cooling, without preheating and precooling before cooling, which can cause internal stress or crystal structure defects in the welding strip due to rapid cooling, thereby reducing the annealing effect and quality of the welding strip. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an annealing device for photovoltaic welding strip to solve the problem that the heated welding strip is directly transferred to the annealing water tank for direct cooling without preheating and precooling before cooling, which can cause internal stress or crystal structure defects in the welding strip due to rapid cooling, thereby reducing the annealing effect and quality of the welding strip.

[0006] In order to realize the above-mentioned utility model purposes, the utility model discloses the following technical scheme: an annealing device of photovoltaic welding strip, including mounting frame, the mounting frame is fixed at the front side of annealing water tank, the top of annealing water tank is fixed with singlechip, the top of mounting frame is fixed with annealing pipe, the top of anneannealing water tank is provided with feed inlet, the top of annealing water tank is fixed with L-shaped pipe, the inner wall of L-shaped pipe is fixed with flow guide plate, the top and bottom of L-shaped pipe are provided with two mounting holes, the inner wall of mounting hole is fixed with heating sheet, the left side of L-shaped pipe is fixed with first temperature display, the front side and rear side of L-shaped pipe are provided with two fixed holes, the inner wall of fixed hole is fixed with air cooler, the second temperature display is fixed on L-shaped pipe, the inductive end of first temperature display and second temperature display extends to L-shaped pipe, and the heating sheet, first temperature display, air cooler, second temperature display are electrically connected with singlechip.

[0007] Preferably, the inner wall of the L-shaped pipe is fixed with a baffle, the top of the baffle is provided with a discharge port, the baffle divides the internal cavity of the L-shaped pipe into two parts, the upper cavity is a heat preservation cavity, and the lower cavity is a pre-cooling cavity.

[0008] Preferably, the front side of the L-shaped pipe is fixed with a limiting plate, the top of the limiting plate is provided with a plurality of through holes, the lower side of the limiting plate is provided with a limiting strip, the top of the limiting strip is fixed with a plurality of connecting columns, the connecting columns are slidably inserted into the through holes, the outer wall of the connecting column is wound with a spring, the top end of the spring is fixed with the bottom surface of the limiting plate, and the bottom end of the spring is fixed with the top surface of the limiting strip.

[0009] Preferably, the outer wall of the annealing pipe is fixed with an air inlet, and the air inlet extends into the annealing pipe.

[0010] Preferably, the left side of the annealing water tank is fixed with a driving motor, the driving motor is electrically connected with the singlechip, the output shaft of the driving motor extends into the annealing water tank, and one end of the output shaft of the driving motor is fixed with an annealing roller.

[0011] Preferably, the top of the annealing water tank is fixed with a limiting roller.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] I. In the process of moving the photovoltaic welding strip to the annealing water tank, the L-shaped tube internal cavity is divided into two functional areas, namely the heat preservation cavity and the pre-cooling cavity, by the blocking plate. The annealed photovoltaic welding strip first enters the heat preservation cavity, and under the action of the heating sheet, the welding strip can maintain the temperature after annealing, effectively preventing the internal stress or crystal structure defects caused by rapid cooling. Through heat preservation treatment, the ductility and conductivity of the photovoltaic welding strip are ensured to be in the best state, providing reliable performance guarantee for subsequent application.

[0014] Subsequently, the photovoltaic welding strip enters the pre-cooling cavity through the discharge port, and the air cooler cools the welding strip, reducing its temperature, effectively preventing the material performance from being reduced due to the large temperature difference when the welding strip directly enters the annealing water tank, providing stable transition conditions for subsequent water cooling, and finally, the photovoltaic welding strip is completely cooled in the annealing water tank through water cooling, ensuring the stability of its crystal structure and the full elimination of internal stress.

[0015] Through the cooperation of the heating sheet, the first temperature display, the air cooler and the second temperature display, precise temperature control, uniform heating and segmented cooling of the photovoltaic welding strip during annealing are realized, so that the staff can flexibly adjust the temperature in the heat preservation cavity and the pre-cooling cavity through the first temperature display and the second temperature display according to the annealing requirements of the photovoltaic welding strip, so that the welding strip can be heat preserved and pre-cooled before cooling, thereby improving the annealing efficiency and quality of the photovoltaic welding strip.

[0016] II. The limiting strip can limit the photovoltaic welding strip before it enters the L-shaped tube, so that the limiting strip can exert downward pressure on the photovoltaic welding strip under the pre-tightening force of the spring, thereby controlling the position and tension of the photovoltaic welding strip, preventing the photovoltaic welding strip from breaking due to excessive tension or relaxing due to insufficient tension, thereby ensuring the quality of the photovoltaic welding strip. The gas inlet port can facilitate the staff to inject inert gas into the annealing tube, and the inert gas can prevent the surface of the photovoltaic welding strip from oxidizing and maintain its good conductivity and welding performance.

[0017] III. The annealing roller is used to support and guide the movement of the photovoltaic welding strip in the annealing water tank, ensuring that the welding strip remains flat during annealing and avoiding deformation caused by gravity or uneven tension. At the same time, through the rotation of the annealing roller, the photovoltaic welding strip uniformly contacts the cooling medium (such as water), improving the cooling efficiency. The limiting roller can raise the distance between the photovoltaic welding strip and the top surface of the annealing water tank, reducing the friction between the surface of the photovoltaic welding strip and the top surface of the annealing water tank, effectively preventing scratches on the surface of the photovoltaic welding strip during transmission, thereby improving the quality of the photovoltaic welding strip. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the embodiment.

[0019] Figure 2 Split diagram for an embodiment.

[0020] Figure 3 Cross-sectional view of an L-shaped tube for an embodiment.

[0021] Figure 4 System block diagram for an embodiment. Figure 2 Enlarged view of A in the middle.

[0022] Figure 5 System block diagram for an embodiment.

[0023] In the figure: 1, mounting frame; 2, annealing water tank; 3, annealing tube; 4, feed inlet; 5, L-shaped tube; 501, flow guide plate; 6, mounting hole; 7, heating sheet; 8, first temperature display; 9, fixing hole; 10, cold air blower; 11, second temperature display; 12, blocking plate; 13, discharge outlet; 14, limiting plate; 15, through hole; 16, limiting strip; 17, connecting column; 18, spring; 19, air inlet; 20, driving motor; 21, annealing roller; 22, limiting roller. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] As Figures 1-5 shown, an annealing device for photovoltaic welding strip includes a mounting frame 1 fixed to the front side of an annealing water tank 2. The top surface of the annealing water tank 2 is fixed with a single-chip microcomputer, the model of which is STM32. The top surface of the mounting frame 1 is fixed with an annealing tube 3. The inside of the annealing tube 3 is equipped with a heating device for heating the photovoltaic welding strip. The annealing tube 3 has an existing structure and will not be described here. The top surface of the annealing water tank 2 is provided with a feed inlet 4. The top surface of the annealing water tank 2 is fixed with an L-shaped tube 5. The inner wall of the L-shaped tube 5 is fixed with a flow guide plate 501. The top surface and the bottom surface of the L-shaped tube 5 are both provided with two mounting holes 6. The inner wall of the mounting hole 6 is fixed with a heating sheet 7. The left side of the L-shaped tube 5 is fixed with a first temperature display 8. The front side and the rear side of the L-shaped tube 5 are both provided with two fixing holes 9. The inner wall of the fixing hole 9 is fixed with a cold air blower 10. The L-shaped tube 5 is fixed with a second temperature display 11. The sensing ends of the first temperature display 8 and the second temperature display 11 both extend into the L-shaped tube 5. The heating sheet 7, the first temperature display 8, the cold air blower 10, and the second temperature display 11 are all electrically connected with the single-chip microcomputer. The inner wall of the L-shaped tube 5 is fixed with a blocking plate 12. The top surface of the blocking plate 12 is provided with a discharge outlet 13. The blocking plate 12 divides the internal cavity of the L-shaped tube 5 into two parts. The upper cavity is a heat preservation cavity, and the lower cavity is a pre-cooling cavity.

[0026] In use, during the movement of the photovoltaic welding strip towards the annealing water tank 2 (not shown in the figure), the division of the internal cavity of the L-shaped pipe 5 by the blocking plate 12 divides the internal cavity of the L-shaped pipe 5 into two functional areas, namely a heat preservation cavity and a pre-cooling cavity. The heated photovoltaic welding strip first enters the heat preservation cavity, and under the action of the heating sheet 7, the welding strip can maintain the temperature after annealing, effectively preventing the internal stress or crystal structure defects caused by rapid cooling. Through heat preservation treatment, the ductility and conductivity of the photovoltaic welding strip are ensured to be in the best state, providing reliable performance guarantee for subsequent application.

[0027] Subsequently, the photovoltaic welding strip enters the pre-cooling cavity through the discharge port 13 under the action of the flow guide plate 501, and the cooling fan 10 cools the welding strip, thereby reducing its temperature, effectively preventing the performance degradation of the welding strip due to the large temperature difference when it directly enters the annealing water tank 2, and providing stable transition conditions for subsequent water cooling. Finally, the photovoltaic welding strip is completely cooled by water cooling in the annealing water tank 2, ensuring the stability of its crystal structure and the full elimination of internal stress.

[0028] Through the cooperation of the heating sheet 7, the first temperature display 8, the cooling fan 10 and the second temperature display 11, precise temperature control, uniform heating and segmented cooling of the photovoltaic welding strip during the annealing process are realized. The staff can flexibly adjust the temperature in the heat preservation cavity and the pre-cooling cavity through the first temperature display 8 and the second temperature display 11 according to the annealing requirements of the photovoltaic welding strip, so that the welding strip can be heat preserved and pre-cooled before cooling, thereby improving the annealing efficiency and quality of the photovoltaic welding strip.

[0029] As shown in Figures 1-3 The front side of the L-shaped pipe 5 is fixed with a limiting plate 14, the top surface of the limiting plate 14 is provided with a plurality of through holes 15, the lower side of the limiting plate 14 is provided with a limiting strip 16, the top surface of the limiting strip 16 is fixed with a plurality of connecting columns 17, the connecting columns 17 are slidably inserted into the through holes 15, the outer wall of the connecting columns 17 is wound with springs 18, the top end of the springs 18 is fixed with the bottom surface of the limiting plate 14, the bottom end of the springs 18 is fixed with the top surface of the limiting strip 16, the outer wall of the annealing pipe 3 is fixed with an air inlet 19, and the air inlet 19 extends into the annealing pipe 3.

[0030] In use, the limiting strip 16 can limit the photovoltaic welding strip before it enters the L-shaped pipe 5, so that the limiting strip 16 can exert downward pressure on the photovoltaic welding strip under the pre-tightening force of the springs 18, thereby controlling the position and tension of the photovoltaic welding strip, preventing the photovoltaic welding strip from being broken due to excessive tension or relaxed due to insufficient tension, and thereby ensuring the quality of the photovoltaic welding strip. Through the air inlet 19, the staff can conveniently inject inert gas into the annealing pipe 3, and the inert gas can prevent the surface of the photovoltaic welding strip from being oxidized, thereby maintaining its good conductivity and welding performance.

[0031] As Figure 1 、 Figure 2 and Figure 5 shown, the left side of the annealing water tank 2 is fixed with a drive motor 20, the drive motor 20 is electrically connected with the single-chip microcomputer, the output shaft of the drive motor 20 extends into the annealing water tank 2, one end of the output shaft of the drive motor 20 is fixed with an annealing roller 21, and the top surface of the annealing water tank 2 is fixed with a limiting roller 22.

[0032] In use, after the photovoltaic welding strip passes through the pre-cooling cavity, it penetrates into the feeding port 4, then bypasses the annealing roller 21 to contact the surface of the annealing roller 21, and then moves upwardly in the annealing water tank 2 to the surface of the limiting roller 22, and then moves horizontally to the right to the winding device, the annealing roller 21 is used to support and guide the movement of the photovoltaic welding strip in the annealing water tank 2, so as to ensure that the welding strip remains flat during the annealing process, and deformation caused by gravity or uneven tension is avoided, at the same time, through the rotation of the annealing roller 21, the photovoltaic welding strip uniformly contacts the cooling medium (such as water), so as to improve the cooling efficiency. The limiting roller 22 can raise the distance between the photovoltaic welding strip and the top surface of the annealing water tank 2, can reduce the friction between the surface of the photovoltaic welding strip and the top surface of the annealing water tank 2, and can effectively prevent the surface of the photovoltaic welding strip from being scratched during the transmission process, so as to improve the quality of the photovoltaic welding strip.

[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An annealing device for photovoltaic soldering strips, comprising a mounting frame (1) fixed to the front side of an annealing water tank (2), characterized in that, The top surface of the annealing water tank (2) is fixed with a single-chip microcomputer, the top surface of the mounting frame (1) is fixed with an annealing pipe (3), the top surface of the annealing water tank (2) is provided with a feeding port (4), the top surface of the annealing water tank (2) is fixed with an L-shaped pipe (5), the inner wall of the L-shaped pipe (5) is fixed with a flow guide plate (501), two mounting holes (6) are formed in the top surface and the bottom surface of the L-shaped pipe (5), the inner wall of the mounting hole (6) is fixed with a heating sheet (7), the left side of the L-shaped pipe (5) is fixed with a first temperature display (8), two fixing holes (9) are formed in the front side and the rear side of the L-shaped pipe (5), the inner wall of the fixing hole (9) is fixed with a cold air blower (10), the L-shaped pipe (5) is fixed with a second temperature display (11), and the sensing ends of the first temperature display (8) and the second temperature display (11) extend into the L-shaped pipe (5).

2. The apparatus for annealing photovoltaic solder strips of claim 1, wherein: The inner wall of the L-shaped pipe (5) is fixed with a blocking plate (12), the top surface of the blocking plate (12) is provided with a discharging port (13), and the blocking plate (12) divides the internal cavity of the L-shaped pipe (5) into two parts, the upper cavity is a heat preservation cavity, and the lower cavity is a pre-cooling cavity.

3. The apparatus for annealing photovoltaic solder strips of claim 2, wherein: The front side of the L-shaped pipe (5) is fixed with a limiting plate (14), a plurality of through holes (15) are formed in the top surface of the limiting plate (14), a limiting strip (16) is arranged below the limiting plate (14), a plurality of connecting columns (17) are fixed to the top surface of the limiting strip (16), the connecting columns (17) are slidably inserted into the through holes (15), springs (18) are wound on the outer walls of the connecting columns (17), the top ends of the springs (18) are fixed to the bottom surface of the limiting plate (14), and the bottom ends of the springs (18) are fixed to the top surface of the limiting strip (16).

4. The apparatus for annealing photovoltaic solder strips of claim 1, wherein: The outer wall of the annealing pipe (3) is fixed with an air inlet (19), and the air inlet (19) extends into the annealing pipe (3).

5. The apparatus for annealing photovoltaic solder strips of claim 4, wherein: The left side of the annealing water tank (2) is fixed with a driving motor (20), the driving motor (20) is electrically connected with the single-chip microcomputer, the output shaft of the driving motor (20) extends into the annealing water tank (2), and one end of the output shaft of the driving motor (20) is fixed with an annealing roller (21).

6. The apparatus for annealing photovoltaic solder strips of claim 5, wherein: The top surface of the annealing water tank (2) is fixed with a limiting roller (22).

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