A processing apparatus for slurry used in solar photovoltaic cells

Abstract

This utility model relates to the field of solar photovoltaic material processing technology, specifically disclosing a processing device for slurry used in solar photovoltaic cells. The device includes a barrel and a lid. The bottom of the barrel has a discharge port with a solenoid valve. The lid has a feed inlet with a sealing cap threaded onto its outer wall. The device also includes a stirring mechanism, a filtering mechanism, a wall scraping mechanism, and a temperature control mechanism. The filtering mechanism includes a filter screen plate disposed in the middle of the inner wall of the barrel. The stirring mechanism includes a drive motor mounted on the upper surface of the lid, with its output end extending into the interior of the barrel and fixedly connected to a rotating shaft. The filter screen plate enables online screening of raw materials. A spring and flange cooperate to keep the filter screen plate stationary to prevent wear. Upper and lower scraper plates and upper and lower stirring blades work together to achieve full-area cleaning and zoned mixing. The temperature control mechanism precisely regulates the temperature, effectively improving the quality and efficiency of slurry processing.

Description

Technical Field

[0001] This utility model relates to the field of solar photovoltaic material processing technology, and specifically discloses a processing device for slurry for solar photovoltaic cells. Background Technology

[0002] Solar photovoltaic cell pastes (such as conductive silver paste and aluminum paste) are key functional materials for preparing photovoltaic cell electrodes, and their quality directly affects the photoelectric conversion efficiency and printing yield of the cells. These pastes are usually processed by multiple steps, including mixing, dispersing, and grinding, of a conductive phase (silver powder, aluminum powder, etc.), a glass phase, and an organic carrier. They are characterized by high solid content, high viscosity, and strict fineness requirements.

[0003] Currently, photovoltaic paste processing equipment mostly adopts a structure of mixing tank and mixing paddle, with the paddle rotating through a stirring shaft to mix and disperse the raw materials. However, existing equipment has the following technical shortcomings in practical applications: First, the slurry tends to adhere to the inner wall of the tank during the mixing process. In particular, high-viscosity slurries are prone to forming a skin or solidified layer on the surface of the tank wall. This not only wastes materials, but the residual solidified slurry mixed into the next batch will also affect the purity and quality stability of the product. Existing equipment lacks an effective tank wall cleaning structure.

[0004] Secondly, the slurry raw materials may contain insufficiently dispersed agglomerated particles or impurities mixed in from the outside. If they are not effectively screened before mixing, these large particles will directly enter the subsequent processes, resulting in the final slurry fineness not meeting the standards. This can easily cause problems such as screen clogging and grid line breakage during battery cell printing, affecting the printing quality.

[0005] Third, the viscosity of the slurry is quite sensitive to temperature, and existing equipment often lacks an effective temperature control structure, resulting in low mixing efficiency or unstable slurry performance. Utility Model Content

[0006] This utility model proposes a processing device for slurry used in solar photovoltaic cells. The device achieves online screening of raw materials through a filter screen, and the spring and flange work together to keep the filter screen stationary to avoid wear. The upper and lower scraper plates and the upper and lower stirring blades work together to achieve full-area cleaning and zoned mixing. The device is equipped with a temperature control mechanism to precisely regulate the temperature, effectively improving the quality and efficiency of slurry processing.

[0007] This utility model is implemented as follows: a processing device for slurry for solar photovoltaic cells includes a barrel body and a barrel cover. The bottom end of the barrel body is provided with a discharge port, and a solenoid valve is provided on the discharge port. The barrel cover is provided with a feed port, and a sealing cap is threadedly connected to the outer wall of the feed port. It also includes a stirring mechanism, a filtering mechanism, a wall scraping mechanism, and a temperature control mechanism. The filtration mechanism includes a filter screen plate disposed in the middle of the inner wall of the barrel; The stirring mechanism includes a drive motor installed on the upper surface of the bucket lid. The output end of the drive motor extends into the interior of the bucket and is fixedly connected to a rotating shaft. The filter screen is rotatably sleeved on the outer wall of the rotating shaft. Multiple upper stirring blades located on the upper side of the filter screen and multiple lower stirring blades located on the lower side of the filter screen are fixedly connected to the outer wall of the rotating shaft. The scraping mechanism includes two upper scraping plates located on the upper side of the filter screen plate and two lower scraping plates located on the lower side of the filter screen plate. The upper scraping plates and the lower scraping plates are fixedly connected to the rotating shaft by connecting rods and abut against the inner wall of the barrel. The temperature control mechanism includes a double-layer cavity disposed on the inner wall of the barrel, an inlet pipe and an outlet pipe communicating with the double-layer cavity.

[0008] In a preferred embodiment of the processing device for slurry of solar photovoltaic cells according to this utility model, the upper inner diameter of the barrel is larger than the lower inner diameter, forming a flange, and the filter screen plate overlaps the upper end face of the flange.

[0009] As a preferred embodiment of the processing device for slurry of solar photovoltaic cells according to the present invention, the outer wall of the rotating shaft is fixedly connected with an upper limit ring and a lower limit ring located on the upper and lower sides of the filter screen plate, and the outer wall of the rotating shaft is sleeved with a spring located between the upper limit ring and the filter screen plate.

[0010] As a preferred embodiment of the processing device for slurry of solar photovoltaic cells according to this utility model, two symmetrically distributed electric push rods are installed on the outer wall of the barrel, and the output ends of the two electric push rods are fixedly connected to the barrel lid.

[0011] As a preferred embodiment of the processing device for slurry for solar photovoltaic cells according to this utility model, a temperature sensor is provided on the inner wall of the bucket lid.

[0012] As a preferred embodiment of the processing device for slurry of solar photovoltaic cells according to this utility model, the upper scraper and the lower scraper are both made of polytetrafluoroethylene or silicone.

[0013] As a preferred embodiment of the processing device for slurry of solar photovoltaic cells according to this utility model, the outer wall of the barrel is provided with a controller, and the drive motor, electric push rod and temperature sensor are all electrically connected to the controller.

[0014] The beneficial effects of this utility model are: The filter screen enables online screening of raw materials, effectively removing large particles and ensuring the fineness of the slurry. A spring and flange work together to keep the filter screen stationary during shaft rotation, ensuring screening stability and preventing relative wear. Upper and lower scraper plates are positioned on the upper and lower sides of the filter screen, respectively, achieving thorough cleaning of the entire inner wall of the tank. Combined with the zoned mixing of upper and lower agitator blades, this forms a collaborative "upper screening, lower fine mixing" operation mode, significantly improving mixing efficiency and uniformity. The overall structure is compact and reliable, effectively improving the quality stability and production efficiency of photovoltaic cell slurry processing. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is an overall structural diagram of a processing device for slurry used in solar photovoltaic cells according to this utility model.

[0017] Figure 2 This is a front sectional view of a processing device for slurry used in solar photovoltaic cells according to this utility model.

[0018] Figure 3 This is an internal structural diagram of a processing device for slurry used in solar photovoltaic cells according to this utility model.

[0019] Figure 4 This utility model Figure 2 Enlarged view of point A in the middle.

[0020] The markings in the diagram are: 1. Barrel body; 2. Barrel lid; 3. Feed inlet; 4. Discharge outlet; 5. Drive motor; 6. Electric actuator; 7. Rotating shaft; 8. Upper stirring blade; 9. Lower stirring blade; 10. Filter screen; 11. Upper scraper; 12. Lower scraper; 13. Lower limit ring; 14. Upper limit ring; 15. Spring; 16. Flange; 17. Temperature sensor. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figure 1-4A processing device for slurry for solar photovoltaic cells includes a barrel body 1 and a barrel cover 2. The bottom end of the barrel body 1 is provided with a discharge port 4 and a solenoid valve is provided on the discharge port 4. The barrel cover 2 is provided with a feed port 3 and a sealing cap is threadedly connected to the outer wall of the feed port 3. The device also includes a stirring mechanism, a filtering mechanism, a wall scraping mechanism and a temperature control mechanism. The filtration mechanism includes a filter screen 10 disposed in the middle of the inner wall of the barrel 1; The stirring mechanism includes a drive motor 5 installed on the upper surface of the bucket cover 2. The output end of the drive motor 5 extends into the interior of the bucket body 1 and is fixedly connected to a rotating shaft 7. The filter screen plate 10 is rotatably sleeved on the outer wall of the rotating shaft 7. Multiple upper stirring blades 8 located on the upper side of the filter screen plate 10 and multiple lower stirring blades 9 located on the lower side of the filter screen plate 10 are fixedly connected to the outer wall of the rotating shaft 7. The wall scraping mechanism includes two upper scraping plates 11 located on the upper side of the filter screen plate 10 and two lower scraping plates 12 located on the lower side of the filter screen plate 10. The upper scraping plates 11 and the lower scraping plates 12 are fixedly connected to the rotating shaft 7 by connecting rods and abut against the inner wall of the barrel 1. The temperature control mechanism includes a jacketed cavity located on the inner wall of the barrel 1, an inlet pipe and an outlet pipe connected to the jacketed cavity.

[0023] In this embodiment: the lid 2 is closed at the upper end of the barrel body 1, the rotating shaft 7 passes through the filter screen plate 10, and the filter screen plate 10 overlaps the flange 16 on the inner wall of the barrel body 1. The spring 15, under the action of the upper limit ring 14, applies a downward elastic pressing force to the filter screen plate 10, making it stably fit against the upper end face of the flange 16. At this time, the rotating shaft 7 rotates while the filter screen plate 10 remains stationary. After the raw material is fed in through the feed inlet 3, the drive motor 5 drives the rotating shaft 7 to rotate, and the upper stirring blade 8 stirs the raw material above the filter screen plate 10, with a particle size of... Qualified materials pass through the filter screen 10 and fall into the lower part of the barrel 1. The lower stirring blades 9 finely disperse the material, while the upper scraper 11 and lower scraper 12 rotate synchronously with the rotating shaft 7 to scrape off the slurry adhering to the upper and lower inner walls of the barrel 1, respectively, to prevent residue and solidification. The temperature control mechanism circulates a heat-conducting medium into the jacket cavity and monitors the temperature inside the barrel in real time with the temperature sensor 17 to ensure that the slurry is processed within the optimal viscosity range. After processing, the solenoid valve opens, and the slurry is discharged through the outlet 4. This utility model achieves online screening of raw materials through the filter screen 10. The spring 15 and the flange 16 cooperate to keep the filter screen 10 stationary, avoiding relative wear and affecting the filtration effect. The upper scraper 11 and lower scraper 12 achieve full-area cleaning of the inner wall of the barrel 1. Combined with the partitioned stirring of the upper stirring blades 8 and lower stirring blades 9, a collaborative operation mode of "upper screening and lower fine mixing" is formed, which improves the mixing efficiency and uniformity.

[0024] As a technical optimization of this utility model, the upper inner diameter of the barrel 1 is larger than the lower inner diameter, forming a flange 16, and the filter screen 10 overlaps the upper end face of the flange 16.

[0025] In this embodiment: by setting the flange 16, the filter screen 10 can be quickly positioned and stably attached to the flange 16, which is convenient for disassembly and assembly and does not require additional fasteners.

[0026] As a technical optimization of this utility model, the outer wall of the rotating shaft 7 is fixedly connected with an upper limit ring 14 and a lower limit ring 13 located on the upper and lower sides of the filter screen plate 10, and the outer wall of the rotating shaft 7 is sleeved with a spring 15 located between the upper limit ring 14 and the filter screen plate 10.

[0027] In this embodiment, the spring 15 applies a downward elastic pressing force to the filter screen 10 under the action of the upper limit ring 14, so that it is stably attached to the upper end face of the flange 16, which ensures that the filter screen 10 remains stationary during screening and avoids wear caused by rigid contact.

[0028] As a technical optimization of this utility model, two symmetrically distributed electric push rods 6 are installed on the outer wall of the barrel body 1, and the output ends of the two electric push rods 6 are fixedly connected to the barrel cover 2.

[0029] In this embodiment: two electric actuators 6 are activated simultaneously, and the electric actuators 6 drive the bucket lid 2 to rise and fall, thereby facilitating the opening or closing of the bucket lid 2.

[0030] As a technical optimization of this utility model, a temperature sensor 17 is provided on the inner wall of the bucket lid 2.

[0031] In this embodiment, the temperature sensor 17 is an infrared temperature sensor, which facilitates real-time monitoring of the slurry temperature inside the tank and allows the temperature control mechanism to accurately adjust the temperature of the heat-conducting medium in the jacket cavity, so that the slurry is always in the optimal processing viscosity range.

[0032] As a technical optimization of this utility model, the upper scraper 11 and the lower scraper 12 are both made of polytetrafluoroethylene or silicone.

[0033] In this embodiment, polytetrafluoroethylene or silicone is used to avoid wear caused by rigid contact between the scraper and the inner wall of the barrel 1. At the same time, its self-lubricating and corrosion-resistant properties extend the service life of the device while ensuring the scraping effect.

[0034] As a technical optimization of this utility model, a controller is provided on the outer wall of the barrel 1, and the drive motor 5, electric push rod 6 and temperature sensor 17 are all electrically connected to the controller.

[0035] In this embodiment: the controller adopts a PLC programmable logic controller, which collects the temperature inside the barrel in real time through temperature sensor 17 and feeds it back to the PLC. The PLC controls the opening and closing of the solenoid valve of the temperature control mechanism according to the set temperature threshold to adjust the flow of heat transfer medium in the jacket cavity, and at the same time controls the speed of drive motor 5 and the lifting and lowering action of electric push rod 6.

[0036] The working principle and usage process of this utility model are as follows: During operation, after the raw material is fed into the feed inlet 3, the drive motor 5 drives the rotating shaft 7 to rotate. The upper stirring blade 8 stirs the raw material above the filter screen plate 10. Material with qualified particle size passes through the filter screen plate 10 and falls into the lower part of the barrel 1. The lower stirring blade 9 finely disperses it. At the same time, the upper scraper plate 11 and the lower scraper plate 12 rotate synchronously with the rotating shaft 7 to scrape off the slurry adhering to the upper and lower inner walls of the barrel 1, respectively, to avoid residue and solidification. The temperature control mechanism circulates the material into the jacket cavity. A heat-conducting medium, in conjunction with a temperature sensor 17, monitors the temperature inside the tank in real time to ensure that the slurry is processed within the optimal viscosity range. After processing, the solenoid valve opens, and the slurry is discharged through the outlet 4. When it is necessary to clean or replace the filter screen 10, the electric push rod 6 drives the tank cover 2 to rise, and the rotating shaft 7 drives the filter screen 10 to rise synchronously through the lower limit ring 13, so that the filter screen 10 is separated from the flange 16 and exposed to the outside of the tank body 1, making it convenient for operators to perform maintenance. After maintenance, the tank cover 2 can be put back on the tank body 1 by the electric push rod 6.

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A processing apparatus for a slurry for solar photovoltaic cells, comprising a barrel body (1) and a barrel cover (2), wherein a discharge port (4) is provided at the bottom end of the barrel body (1), a solenoid valve is provided on the discharge port (4), and a feed port (3) is provided on the barrel cover (2), wherein a sealing cap is threadedly connected to the outer wall of the feed port (3), characterized in that: It also includes a stirring mechanism, a filtering mechanism, a wall scraping mechanism, and a temperature control mechanism; The filtration mechanism includes a filter screen (10) disposed in the middle of the inner wall of the barrel (1); The stirring mechanism includes a drive motor (5) installed on the upper surface of the bucket lid (2). The output end of the drive motor (5) extends into the interior of the bucket body (1) and is fixedly connected to a rotating shaft (7). The filter screen plate (10) is rotatably sleeved on the outer wall of the rotating shaft (7). The outer wall of the rotating shaft (7) is fixedly connected to a plurality of upper stirring blades (8) located on the upper side of the filter screen plate (10) and a plurality of lower stirring blades (9) located on the lower side of the filter screen plate (10). The scraping mechanism includes two upper scraping plates (11) located on the upper side of the filter screen plate (10) and two lower scraping plates (12) located on the lower side of the filter screen plate (10). The upper scraping plates (11) and the lower scraping plates (12) are fixedly connected to the rotating shaft (7) by connecting rods and abut against the inner wall of the barrel (1). The temperature control mechanism includes a double-layer cavity disposed on the inner wall of the barrel (1), an inlet pipe and an outlet pipe communicating with the double-layer cavity.

2. The processing apparatus for a slurry for solar photovoltaic cells according to claim 1, characterized in that: The upper inner diameter of the barrel (1) is larger than the lower inner diameter, forming a flange (16), and the filter screen (10) overlaps the upper end face of the flange (16).

3. The processing apparatus for a slurry for solar photovoltaic cells according to claim 1, characterized in that: The outer wall of the rotating shaft (7) is fixedly connected with an upper limit ring (14) and a lower limit ring (13) located on the upper and lower sides of the filter screen plate (10). The outer wall of the rotating shaft (7) is sleeved with a spring (15) located between the upper limit ring (14) and the filter screen plate (10).

4. The processing apparatus for a slurry for solar photovoltaic cells according to claim 1, characterized in that: Two symmetrically distributed electric actuators (6) are installed on the outer wall of the barrel body (1), and the output ends of the two electric actuators (6) are fixedly connected to the barrel lid (2).

5. The processing apparatus for a slurry for solar photovoltaic cells according to claim 4, characterized in that: A temperature sensor (17) is provided on the inner wall of the bucket lid (2).

6. The processing apparatus for a slurry for solar photovoltaic cells according to claim 1, characterized in that: The upper scraper (11) and the lower scraper (12) are both made of polytetrafluoroethylene or silicone.

7. The processing apparatus for a slurry for solar photovoltaic cells according to claim 5, characterized in that: The outer wall of the barrel (1) is equipped with a controller, and the drive motor (5), electric push rod (6) and temperature sensor (17) are all electrically connected to the controller.

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