Single-sided black photovoltaic welding strip painting device

Abstract

The invention belongs to the technical field of photovoltaic welding strip production, and particularly discloses a single-face black photovoltaic welding strip painting device which comprises a painting unit and an oven unit which are sequentially arranged in the direction of a welding strip to be painted, and the painting unit is mainly composed of a driving roller, a transfer printing roller, a scraper, a material groove and the like. The driving roller and the transfer printing roller are respectively driven by a servo motor, the speed of the driving roller and the speed of the transfer printing roller can be independently controlled, and the driving roller and the scraper are correspondingly provided with a positioning adjusting mechanism and a linear moving mechanism, so that the roller gap distance among the driving roller, the scraper and the transfer printing roller is adjusted to adapt to welding strips and wet paint coatings with different thicknesses, and the universality of the device is improved; great convenience is brought to threading and maintenance work; and the oven unit is mainly used for curing the surface of the welding strip painted by the painting unit. According to the painting device, environmental pollution can be effectively reduced, paint resources are saved, meanwhile, the painting efficiency is greatly improved, and the large-scale requirement of the market for black photovoltaic welding strips can be completely met.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic welding strip production, and specifically relates to a single-sided black photovoltaic welding strip painting device. Background Art

[0002] Energy plays a vital role in human society and is the basic support for social development, production and life. However, traditional energy is facing problems such as rapid consumption and environmental pollution, which has prompted countries around the world to focus on the development of renewable energy. Therefore, in recent years, renewable energy such as solar energy, wind energy, hydrogen energy and biomass energy has developed rapidly.

[0003] In the field of solar energy, with the rapid rise of the photovoltaic industry, the application scope of photovoltaic modules has been continuously expanded, such as in residential, commercial, industrial and other fields, and its market demand has continued to grow. At the same time, customers have put forward higher and higher requirements on the appearance and performance of photovoltaic modules. With its high photoelectric conversion efficiency and excellent anti-glare properties, the market demand for all-black photovoltaic modules has continued to rise in recent years, becoming one of the important trends in the development of photovoltaic modules.

[0004] However, in the production process of black photovoltaic welding strips, the paint coating methods currently commonly used are mainly spraying and screen printing. Among them, although the spraying method is relatively simple to operate and has low requirements for paint performance and equipment, it will cause greater pollution to the environment. At the same time, the spraying method will also lead to waste of raw materials. Some paint that is not attached to the welding strip will evaporate or fall off, reducing the utilization rate of the paint; and screen printing requires one by one operation, slow production speed, low efficiency, and it is difficult to meet the needs of large-scale production.

[0005] In view of this, this invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a single-sided black photovoltaic welding tape painting device, which is mainly used to solve the problems of serious environmental pollution, low raw material utilization rate and low efficiency in the current production process of black photovoltaic welding tape, making it difficult for the existing production method to adapt to the large-scale market demand.

[0007] The purpose of the present invention is to be solved by the following technical solutions:

[0008] The present invention provides a single-sided black photovoltaic welding strip painting device, comprising a painting unit and a baking oven unit sequentially arranged along the horizontal direction of the welding strip to be coated, wherein the baking oven unit is used to perform a curing treatment on the surface of the welding strip after being painted by the painting unit;

[0009] Among them, the painting unit includes a frame, the frame is provided with a first linear moving mechanism in the horizontal direction, a driving roller for making the welding strip run in the horizontal direction is rotatably installed on the moving end of the first linear moving mechanism, a transfer roller parallel to and coordinated with the driving roller is rotatably installed on the frame, a scraper is provided obliquely above the transfer roller, and the scraper is adjusted to open and close by a second linear moving mechanism arranged on the frame in the vertical direction, a material trough for providing paint to the transfer roller is provided on the frame, and a material receiving trough is provided directly below the transfer roller.

[0010] Furthermore, the oven unit includes an oven for providing a constant temperature heating environment, and wheel groups are arranged on both sides of the oven, and the wheel groups are used to allow the welding strip painted by the painting unit to pass through the oven at a uniform speed.

[0011] Furthermore, the driving roller and the transfer roller are driven by servo motors respectively, and the speeds can be controlled independently.

[0012] Furthermore, the first linear motion mechanism includes a first linear guide rail fixed on the frame in the horizontal direction, a driving roller bearing seat is slidably installed on the first linear guide rail, a first cylinder is installed on the frame and at one end of the first linear guide rail, and the working end of the first cylinder is connected to the driving roller bearing seat.

[0013] Furthermore, it also includes a first positioning adjustment mechanism disposed between the vertical outer surface of the frame and the driving roller bearing seat, wherein the first positioning adjustment mechanism is used to adapt the thickness of the welding strip by adjusting the roller gap distance between the driving roller and the transfer roller;

[0014] Among them, the first positioning and adjustment mechanism includes a first mounting plate connected to the driving roller bearing seat, and the first mounting plate is equipped with a first micrometer and a first top screw in the horizontal direction. A first locking nut is installed on one end of the first top screw, and a first positioning block is provided at the other end. The first positioning block is fixedly installed on the vertical outer surface of the frame.

[0015] Furthermore, the second linear motion mechanism includes a second linear guide rail fixed on the frame in a vertical direction, a scraper bearing seat is slidably mounted on the second linear guide rail, a second cylinder is mounted on the frame and at one end of the second linear guide rail, and the working end of the second cylinder is connected to the scraper bearing seat for controlling the opening and closing of the scraper.

[0016] Furthermore, it also includes a second positioning adjustment mechanism disposed between the horizontal outer surface of the frame and the scraper bearing seat, and the second positioning adjustment mechanism is used to adapt the thickness of the wet paint coating of the welding strip by adjusting the roller gap distance between the scraper and the transfer roller. The roller gap distance between the scraper and the transfer roller is obtained by the following formula:

[0017] b1 = h1 = h2 ÷ paint solid content (Equation 1)

[0018] In Equation (1):

[0019] b1: represents the roll gap distance between the doctor blade and the transfer roll;

[0020] h1: represents the thickness of the wet paint coating applied on the transfer roll;

[0021] h2: represents the thickness of the dry paint coating on the surface of the solder tape after curing;

[0022] Paint solid content: also known as solid component, is the residual film-forming component after the paint dries and volatilizes;

[0023] Among them, the second positioning and adjusting mechanism includes a second mounting plate connected to the doctor blade bearing seat. The second mounting plate is vertically installed with a second micrometer and a second setscrew. One end of the second setscrew is installed with a second locking nut, and the other end is provided with a second positioning block. The second positioning block is fixedly installed on the horizontal outer surface of the frame.

[0024] Further, the thickness of the wet paint coating on the surface of the solder tape is determined by controlling the speed ratio between the driving roll and the transfer roll. The relationship between the roll gap distances between the driving roll and the transfer roll is shown in the following Equation (2):

[0025] B < T + h1 (Equation 2)

[0026] In Equation (2):

[0027] B: represents the roll gap distance between the driving roll and the transfer roll;

[0028] T: represents the thickness of the solder tape to be coated;

[0029] h1: represents the thickness of the wet paint coating applied on the transfer roll;

[0030] When the diameters of the driving roll and the transfer roll are the same, their speed ratio relationship is shown in the following Equation (3):

[0031]

[0032] In Equation (3):

[0033] i: represents the speed ratio between the driving roll and the transfer roll;

[0034] r: represents the radius of the transfer roll;

[0035] h1: represents the thickness of the wet paint coating applied on the transfer roll;

[0036] B: represents the roll gap distance between the driving roll and the transfer roll;

[0037] T: indicates the thickness of the strip to be coated;

[0038] The larger the roller gap distance B is, the larger the speed ratio between the driving roller and the transfer roller is.

[0039] Furthermore, a first passing wheel and a second passing wheel for guiding the welding strip are arranged at intervals directly below the driving roller, and the first passing wheel and the second passing wheel are both rotatably mounted on the frame.

[0040] Furthermore, a third linear moving mechanism for driving the trough to move is provided on the frame in the horizontal direction;

[0041] The third linear motion mechanism comprises a linear slide fixedly connected to the frame, a nut connection block fixedly connected to the material trough is slidably arranged on the linear slide, and the nut connection block is threadedly connected to a handle screw arranged on the frame.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The single-sided black photovoltaic welding strip painting device provided by the present invention is mainly composed of a painting unit and a baking furnace unit, which realizes efficient painting and curing treatment of the welding strip, effectively overcomes the problems of serious environmental pollution, low raw material utilization rate and low efficiency in the existing black photovoltaic welding strip production process, and adapts to the large-scale market demand. In addition, the device has at least the following advantages:

[0044] First, a first pass wheel and a second pass wheel are arranged directly below the driving roller to guide the welding strip, and the first pass wheel and the second pass wheel cooperate with the power drive of the driving roller to ensure the stability of the welding strip operation.

[0045] Secondly, a first positioning adjustment mechanism, a second positioning adjustment mechanism and a corresponding first linear moving mechanism and a second linear moving mechanism are provided, which can respectively accurately adjust the roller gap distance between the driving roller and the transfer roller and the roller gap distance between the scraper and the transfer roller, so as to adapt to different thicknesses of welding strips and wet paint coatings, thereby improving the versatility of the device; in addition, the first linear moving mechanism drives the driving roller to perform opening and closing movements, which is also convenient for later threading and maintenance.

[0046] Third, the driving roller and the transfer roller are driven by servo motors respectively, and the speeds can be controlled independently, that is, the speed ratio of the two can be controlled, and then the thickness of the surface coating applied on the welding strip can be accurately adjusted.

[0047] Fourthly, the material trough is driven to open and close through the third linear moving mechanism, so as to facilitate the cleaning of paint at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 This is a schematic diagram of the overall structure of the single-sided black photovoltaic welding strip painting device of the present invention;

[0051] Figure 2 The paint unit structure of the present invention is schematically shown in FIG. Figure 1 ;

[0052] Figure 3 The paint unit structure of the present invention is schematically shown in FIG. Figure 2 (Roll gap positioning adjustment);

[0053] Figure 4 It is a schematic diagram of the structure of the oven unit of the present invention.

[0054] in:

[0055] 1 is a painting unit; 101 is a frame; 102 is a first linear motion mechanism; 103 is a driving roller; 104 is a transfer roller; 105 is a scraper; 106 is a second linear motion mechanism; 107 is a material trough; 108 is a material receiving trough; 109 is a first positioning adjustment mechanism; 110 is a second positioning adjustment mechanism; 111 is a first passing wheel; 112 is a second passing wheel; 113 is a third linear motion mechanism; 1021 is a first linear guide rail; 1022 is a driving roller bearing seat; 1023 is a first cylinder; 10 61 is the second linear guide rail; 1062 is the scraper bearing seat; 1063 is the second cylinder; 1091 is the first mounting plate; 1092 is the first micrometer; 1093 is the first top screw; 1094 is the first locking nut; 1095 is the first positioning block; 1101 is the second mounting plate; 1102 is the second micrometer; 1103 is the second top screw; 1104 is the second locking nut; 1105 is the second positioning block; 1131 is the linear slide; 1132 is the nut connecting block; 1133 is the handle screw;

[0056] 2 is a drying oven unit; 201 is a drying oven; 202 is a wheel group;

[0057] A is the welding strip DETAILED DESCRIPTION

[0058] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples consistent with some aspects of the present invention as detailed in the appended claims.

[0059] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0060] See also Figures 1 to 4 A single-sided black photovoltaic welding strip painting device provided in an embodiment of the present invention includes a painting unit 1 and a baking furnace unit 2, and the painting unit 1 and the baking furnace unit 2 are arranged in sequence along the horizontal direction of the welding strip A to be coated, and the baking furnace unit 2 is used to solidify the surface of the welding strip A after being painted by the painting unit 1.

[0061] Specific as Figure 4 As shown, the drying furnace unit 2 in the embodiment of the present invention includes a drying furnace 201 for providing a constant temperature heating environment, and a wheel group 202 is arranged on both sides of the drying furnace 201. The wheel group 202 is used to allow the welding strip A painted by the painting unit 1 to pass through the interior of the drying furnace 201 at a uniform speed to ensure high-quality solidification of the paint coating on the surface of the welding strip A.

[0062] It should be noted that the painting unit 1 provided in the embodiment of the present invention is as follows: Figure 2 , 3 As shown, it includes a frame 1, a first linear moving mechanism 102 is provided in the horizontal direction on the upper left side of the frame 101, a driving roller 103 for making the welding strip A run in the horizontal direction is rotatably installed on the moving end of the first linear moving mechanism 102, a transfer roller 104 (the position of the transfer roller 104 is fixed) parallel to and matched with the driving roller 103 is rotatably installed on the frame 101, and a scraper 105 (the scraper 105 is in the shape of a double comma) is provided obliquely above the transfer roller 104, and the scraper 105 is provided on the upper right side of the frame 101 in the vertical direction. The second linear motion mechanism 106 is driven to adjust the opening and closing of the scraper 105. A material trough 107 for providing paint to the transfer roller 104 is provided on the frame 101, and a receiving trough 108 is provided directly below the transfer roller 104. The receiving trough 108 is used to receive the excess paint that is not completely transferred by the transfer roller 104 to keep the environment around the painting device clean and tidy, and avoid pollution and waste caused by random dripping of excess paint. At the same time, the recycled excess paint can be reused after proper treatment, which further improves the utilization rate of the paint and reduces the production cost.

[0063] Specifically, the first linear moving mechanism 102 includes a first linear guide 1021 fixed on the frame 101 along the horizontal direction, and a driving roller bearing seat 1022 is slidably installed on the first linear guide 1021. A first cylinder 1023 is installed on the frame 101 and at one end of the first linear guide 1021. The working end of the first cylinder 1023 is connected to the driving roller bearing seat 1022, that is, the driving roller 103 installed on the driving roller bearing seat 1022 can be adjusted to be close to or away from the transfer roller 104 by extending and retracting the piston rod of the first cylinder 1023. In this way, on the one hand, the roller gap distance between the two can be adjusted, and on the other hand, it is convenient for later threading and maintenance.

[0064] Since the roller gap distance between the driving roller 103 and the transfer roller 104 determines the thickness adaptation of the welding strip A, the first positioning adjustment mechanism 109 between the vertical facade of the frame 101 and the driving roller bearing seat 1022 of the present invention can accurately adjust the roller gap distance between the driving roller 103 and the transfer roller 104 through the first positioning adjustment mechanism 109, so that it is just about equal to the thickness of the welding strip A. Such a design can ensure that during the transfer process, the transfer roller 104 can not only closely fit the welding strip A to achieve efficient paint transfer, but also will not over-extrude the welding strip A to cause damage to it, and can also prevent the roller surface of the transfer roller 104 from being worn during the reverse coating process.

[0065] The first positioning adjustment mechanism 109 includes a first mounting plate 1091 connected to the driving roller bearing seat 1022. The first mounting plate 1091 is equipped with a first micrometer 1092 and a first top screw 1093 in the horizontal direction. The first micrometer 1092 can accurately measure the slight change of the roller gap distance and provide accurate data reference for adjustment. The first top screw 1093 is used for slight adjustment operation. A first locking nut 1094 is installed on one end of the first micrometer. After adjusting to a suitable position, it can be fixed by the first locking nut 1094 to prevent loosening during operation. A first positioning block 1095 is arranged at the other end. The first positioning block 1095 is fixedly installed on the vertical facade of the frame 101 to provide stable support and positioning for adjustment. Through the above settings, the device can be adjusted quickly and accurately when facing welding strips A of different thicknesses, which improves the versatility and adaptability of the device and provides a strong guarantee for efficient and stable painting production.

[0066] In the embodiment of the present invention, the second linear motion mechanism 106 includes a second linear guide 1061 fixed on the frame 101 along the vertical direction, and a scraper bearing seat 1062 is slidably installed on the second linear guide 1061. A second cylinder 1063 is installed on the frame 101 and at the top of the second linear guide 1061. The working end of the second cylinder 1063 is connected to the scraper bearing seat 1062 for controlling the opening and closing of the scraper 105.

[0067] It further includes a second positioning and adjusting mechanism 110 disposed between the horizontal outer facade of the frame 101 and the squeegee bearing block 1062. The second positioning and adjusting mechanism 110 is used to adapt to the thickness of the wet paint coating of the solder tape (A) by adjusting the roll gap distance between the squeegee 105 and the transfer roller 104. The roll gap distance between the squeegee 105 and the transfer roller 104 is obtained by the following formula (1):

[0068] b1 = h1 = h2 ÷ paint solid content (Formula 1)

[0069] In formula (1):

[0070] b1: represents the roll gap distance between the squeegee 105 and the transfer roller 104;

[0071] h1: represents the thickness of the wet paint coating applied on the transfer roller 104;

[0072] h2: represents the thickness of the dry paint coating on the surface of the solder tape A after curing;

[0073] Paint solid content: also known as solid component, is the residual film-forming component after the paint dries and volatilizes. The higher the solid content, the higher the film-forming rate of the coating.

[0074] In the embodiment of the present invention, the driving roller 103 and the transfer roller 104 are steel rollers with the same diameter. Both are driven by servo motors, and their speeds can be independently controlled. At the same time, their rotation directions are the same, that is, the rotation direction of the transfer roller 104 is opposite to the running direction of the solder tape A sandwiched between the two. Therefore, the paint can be reverse-coated on the surface of the solder tape A through the transfer roller 404. And when the device is running, by controlling the speed ratio of the driving roller 103 and the transfer roller 104, the thickness of the wet paint coating applied on the surface of the solder tape A per unit time can be controlled. At the same time, the roll gap distance relationship between the driving roller 103 and the transfer roller 104 is shown in the following formula (2):

[0075] B < T + h1 (Formula 2)

[0076] In formula (2):

[0077] B: represents the roll gap distance between the driving roller 103 and the transfer roller 104;

[0078] T: represents the thickness of the solder tape A to be coated;

[0079] h1: represents the thickness of the wet paint coating applied on the transfer roller 104;

[0080] When the driving roller 103 and the transfer roller 104 have the same diameter, their speed ratio relationship is shown in the following formula (3):

[0081]

[0082] In formula (3):

[0083] i: represents the speed ratio between the driving roller 103 and the transfer roller 104;

[0084] r: represents the radius of the transfer roller 104;

[0085] h1: represents the thickness of the wet paint coating applied on the transfer roller 104;

[0086] B: represents the roller gap distance between the driving roller 103 and the transfer roller 104;

[0087] T: represents the thickness of the welding strip A to be coated;

[0088] It can be seen from the formula that the larger the roller gap distance B is, the larger the speed ratio between the driving roller 103 and the transfer roller 104 is.

[0089] Specifically, in order to accurately control the thickness of the wet paint coating, the second positioning adjustment mechanism 110 of the embodiment of the present invention includes a second mounting plate 1101 connected to the scraper bearing seat 1062, and the second mounting plate 1101 is vertically mounted with a second micrometer 1102 and a second top screw 1103, and a second locking nut 1104 is installed on one end of the second top screw 1103, and a second positioning block 1105 is provided on the other end. The second positioning block 1105 is fixedly installed on the horizontal outer surface of the frame 101. The second positioning adjustment mechanism 110 has the same working principle as the first positioning adjustment mechanism 109, which will not be repeated.

[0090] Preferably, in the embodiment of the present invention, a first passing wheel 111 and a second passing wheel 112 for guiding the welding strip A are arranged at a distance directly below the driving roller 103. The first passing wheel 111 and the second passing wheel 112 are both rotatably mounted on the frame 101 to ensure the stable operation of the welding strip A.

[0091] The embodiment of the present invention further includes a third linear motion mechanism 113, which is horizontally arranged on the right side of the frame 101, and is used to drive the material trough 107 for storing the paint to be applied to open and close, so as to facilitate the cleaning of the paint later. The third linear motion mechanism 113 includes a linear slide 1131 fixedly connected to the frame 101, and a nut connection block 1132 fixedly connected to the material trough 107 is slidably arranged on the linear slide 1131, and the nut connection block 1132 is screwed to a handle screw 1133 arranged on the frame 101.

[0092] The working principle of the painting device of the present invention is as follows:

[0093] The painting device uses the driving roller 103 to provide power for the entire painting unit 1, so that the welding strip A runs stably in a specific direction. At the same time, the transfer roller 104 plays a key role as an important transfer carrier of the coating. During the roller coating process, the coating forms a wet film with a certain thickness on the surface of the transfer roller 111; as the transfer roller 104 rotates, it contacts the welding strip A, and then evenly applies the coating to the surface of the welding strip A, and finally the surface of the painted welding strip A is cured after passing through the drying furnace unit 2. Among them, the painting device can accurately adjust the thickness of the coating applied on the surface of the welding strip A by adjusting the speed ratio between the driving roller 103 and the transfer roller 104 to meet different production needs.

[0094] To sum up, the painting device provided by the present invention has low paint loss, can effectively reduce production costs and improve the utilization rate of paint; secondly, it has high production efficiency and can quickly complete the painting operation of the welding strip to meet the needs of large-scale production; thirdly, it does not generate paint mist, thus avoiding the pollution of the environment by paint mist and the harm to the health of operators, and at the same time, there is no splashing of paint mist, ensuring the cleanliness and safety of the working environment; finally, it is simple and convenient to maintain, which reduces the maintenance cost and difficulty of the equipment and improves the reliability and stability of the equipment.

[0095] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0096] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A single-sided black photovoltaic welding strip painting device, characterized in that: It comprises a painting unit (1) and a drying oven unit (2) which are arranged in sequence along the horizontal direction of the welding strip (A) to be coated, wherein the drying oven unit (2) is used to perform a curing treatment on the surface of the welding strip (A) after being coated by the painting unit (1); The painting unit (1) comprises a frame (101), the frame (101) is provided with a first linear moving mechanism (102) in the horizontal direction, a driving roller (103) for making the welding strip (A) run in the horizontal direction is rotatably mounted on the moving end of the first linear moving mechanism (102), a transfer roller (104) parallel to and coordinated with the driving roller (103) is rotatably mounted on the frame (101), a scraper (105) is provided obliquely above the transfer roller (104), the scraper (105) is adjusted to open and close by a second linear moving mechanism (106) provided on the frame (101) in the vertical direction, a material trough (107) for supplying paint to the transfer roller (104) is provided on the frame (101), and a material receiving trough (108) is provided directly below the transfer roller (104).

2. The single-sided black photovoltaic welding strip painting device according to claim 1 is characterized in that: The oven unit (2) comprises an oven (201) for providing a constant temperature heating environment, and wheel groups (202) are arranged on both sides of the oven (201), and the wheel groups (202) are used to allow the welding strip (A) painted by the painting unit (1) to pass through the interior of the oven (201) at a uniform speed.

3. The single-sided black photovoltaic welding strip painting device according to claim 1 is characterized in that: The driving roller (103) and the transfer roller (104) are driven by servo motors respectively, and their speeds can be independently controlled.

4. The single-sided black photovoltaic welding strip painting device according to claim 1 is characterized in that: The first linear motion mechanism (102) comprises a first linear guide rail (1021) fixedly arranged on the frame (101) in the horizontal direction, a driving roller bearing seat (1022) being slidably mounted on the first linear guide rail (1021), a first cylinder (1023) being mounted on the frame (101) and at one end of the first linear guide rail (1021), and a working end of the first cylinder (1023) being connected to the driving roller bearing seat (1022).

5. The single-sided black photovoltaic welding strip painting device according to claim 4 is characterized in that: It also includes a first positioning adjustment mechanism (109) disposed between the vertical outer surface of the frame (101) and the driving roller bearing seat (1022), wherein the first positioning adjustment mechanism (109) is used to adapt the thickness of the welding strip (A) by adjusting the roller gap distance between the driving roller (103) and the transfer roller (104); The first positioning adjustment mechanism (109) comprises a first mounting plate (1091) connected to the driving roller bearing seat (1022); a first micrometer (1092) and a first top screw (1093) are mounted on the first mounting plate (1091) in a horizontal direction; a first locking nut (1094) is mounted on one end of the first top screw (1093); and a first positioning block (1095) is arranged on the other end; the first positioning block (1095) is fixedly mounted on a vertical outer surface of the frame (101).

6. The single-sided black photovoltaic welding strip painting device according to claim 1 is characterized in that: The second linear moving mechanism (106) includes a second linear guide rail (1061) fixedly installed on the frame (101) in the vertical direction. A scraper bearing block (1062) is slidably installed on the second linear guide rail (1061). A second cylinder (1063) is installed on the frame (101) and at one end of the second linear guide rail (1061). The working end of the second cylinder (1063) is connected to the scraper bearing block (1062) for controlling the opening and closing of the scraper (105).

7. The single-sided black photovoltaic welding strip painting device according to claim 6 is characterized in that: It further includes a second positioning and adjusting mechanism (110) arranged between the horizontal outer facade of the frame (101) and the scraper bearing block (1062). The second positioning and adjusting mechanism (110) is used to adapt to the thickness of the wet paint coating of the solder tape (A) by adjusting the roll gap distance between the scraper (105) and the transfer roller (104). The roll gap distance between the scraper (105) and the transfer roller (104) is obtained by the following formula (1): b1 = h1 = h2 ÷ paint solid content (Formula 1) In Formula (1): b1: represents the roll gap distance between the scraper (105) and the transfer roller (104); h1: represents the thickness of the wet paint coating applied on the transfer roller (104); h2: represents the thickness of the dry paint coating on the surface of the solder tape (A) after curing; Paint solid content: also known as solid component, is the residual film-forming component after the paint dries and volatilizes; Among them, the second positioning and adjusting mechanism (110) includes a second mounting plate (1101) connected to the scraper bearing block (1062). The second mounting plate (1101) is vertically installed with a second dial indicator (1102) and a second setscrew (1103). One end of the second setscrew (1103) is installed with a second locking nut (1104), and the other end is provided with a second positioning block (1105). The second positioning block (1105) is fixedly installed on the horizontal outer facade of the frame (101).

8. The single-sided black photovoltaic welding strip painting device according to claim 1 is characterized in that: The thickness of the wet paint coating on the surface of the solder tape (A) is determined by controlling the speed ratio between the driving roller (103) and the transfer roller (104). The relationship between the roll gap distances of the driving roller (103) and the transfer roller (104) is shown in the following formula (2): B < T + h1 (Formula 2) In Formula (2): B: represents the roll gap distance between the driving roller (103) and the transfer roller (104); T: represents the thickness of the solder tape (A) to be coated; h1: represents the thickness of the wet paint coating applied on the transfer roller (104); When the diameters of the driving roller (103) and the transfer roller (104) are the same, their speed ratio relationship is shown in the following formula (3): In Formula (3): i: represents the speed ratio between the driving roller (103) and the transfer roller (104); r: represents the radius of the transfer roller (104); h1: represents the thickness of the wet paint coating applied on the transfer roller (104); B: represents the roll gap distance between the driving roller (103) and the transfer roller (104); T: represents the thickness of the solder tape (A) to be coated; The larger the roll gap distance B is, the larger the speed ratio between the driving roller (103) and the transfer roller (104) is.

9. The single-sided black photovoltaic welding strip painting device according to any one of claims 1 to 8, characterized in that: A first passing wheel (111) and a second passing wheel (112) for guiding the welding strip (A) are arranged at intervals directly below the driving roller (103); the first passing wheel (111) and the second passing wheel (112) are both rotatably mounted on the frame (101).

10. The single-sided black photovoltaic welding strip painting device according to any one of claims 1 to 8, characterized in that: The frame (101) is provided with a third linear moving mechanism (113) in the horizontal direction for driving the material trough (107) to move; The third linear motion mechanism (113) comprises a linear slide (1131) fixedly connected to the frame (101), a nut connection block (1132) fixedly connected to the material trough (107) being slidably arranged on the linear slide (1131), and the nut connection block (1132) being screwed to a handle screw (1133) arranged on the frame (101).

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