Intelligent filtering and storing device for photovoltaic conductive powder production

Abstract

The utility model discloses an intelligent filtering and storing device for photovoltaic conductive powder production, which comprises a stirring reaction tank for performing silver-coated stirring reaction on copper powder and a grading filtering box for performing multiple filtering on silver-coated copper powder, a circulating pipeline used for conveying the silver-coated copper powder solution is arranged between the stirring reaction tank and the grading filtering box, and a multi-stage filtering mechanism used for conducting grading repeated filtering on the silver-coated copper powder solution is arranged in the grading filtering box and aims at conducting layering repeated filtering on the silver-coated copper powder solution obtained after reaction is finished; the filtering effectiveness and efficiency of the silver-coated copper powder solution are improved through multi-stage filtering, the filter residue collecting capacity of the silver-coated copper powder solution is improved, loss of silver-coated copper powder caused by incomplete filtering is avoided, meanwhile, a filter membrane in a multi-stage filter screen can be intelligently and rapidly replaced, and filter residues can be collected, so that the filtering efficiency of the silver-coated copper powder solution is improved. And the complexity of the filtering operation of the silver-coated copper powder solution is reduced.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic production, in particular to an intelligent filtering and storing device for photovoltaic conductive powder production. Background Art

[0002] Photovoltaic silver paste is a key material for preparing metal electrodes for crystalline silicon solar cells. Crystalline silicon solar cells are a typical two-terminal device, consisting of silicon wafers, passivation films and metal electrodes. Crystalline silicon solar cell manufacturers use screen printing to print photovoltaic paste on both sides of silicon wafers, and then dry and sinter them to form the two-terminal electrodes of crystalline silicon solar cells.

[0003] Photovoltaic silver paste is the largest non-silicon cost of crystalline silicon cells, and accounts for a higher proportion in N-type cells. Photovoltaic silver paste is the core auxiliary material for preparing crystalline silicon solar cells. Silver powder, as the conductive phase in photovoltaic silver paste, plays a key role in the electrical properties, fluidity, adhesion and other properties of the silver paste. Silver-coated copper technology is an important route to reduce the amount of silver used. Silver-coated copper technology reduces the amount of silver used by covering the surface of copper powder with silver. By adjusting the ratio of silver to copper, the conversion efficiency can be guaranteed while reducing the cost of silver paste.

[0004] The preparation of silver-coated copper powder is mainly based on melt atomization method and chemical plating method. In chemical plating method, copper powder undergoes replacement reaction in solution, and the surface is coated with a silver layer. After standing, the obtained solution is filtered and the filter residue is collected. The filter residue is washed with deionized water and anhydrous ethanol, and then washed with water and dried to obtain silver-coated copper powder.

[0005] At present, the filtration of silver-coated copper powder solution is mostly carried out by filtering mesh, but a single-layer filter mesh may not be able to fully filter the silver-coated copper powder solution, resulting in loss and waste of silver-coated copper powder, the filtration efficiency is not high, and it is impossible to perfectly collect the silver-coated copper powder solution in multiple layers. In addition, the filter mesh needs to be disassembled when replacing the filter membrane inside the filter mesh, which is troublesome to operate. The present application aims to perform layered and repeated filtration on the silver-coated copper powder solution after the reaction is completed, and to improve the effectiveness and efficiency of the filtration of the silver-coated copper powder solution through multi-stage filtration, and to improve the filter residue collection capacity of the silver-coated copper powder solution, so as to avoid the loss of silver-coated copper powder caused by incomplete filtration, and at the same time, it can intelligently and quickly replace the filter membrane inside the multi-stage filter mesh and collect the filter residue, thereby reducing the cumbersomeness of the filtration operation of the silver-coated copper powder solution. Utility Model Content

[0006] The purpose of the utility model is to provide an intelligent filtering and storing device for producing photovoltaic conductive powder, so as to solve the problems in the prior art.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An intelligent filtering and storage device for producing photovoltaic conductive powder, the device comprising a stirring reaction tank for stirring and reacting copper powder by coating it with a silver layer and a graded filter box for performing multiple filtrations on the silver-coated copper powder, a circulation pipeline for conveying a silver-coated copper powder solution is provided between the stirring reaction tank and the graded filter box, a multi-stage filtering mechanism for performing graded and repeated filtration of the silver-coated copper powder solution is provided inside the graded filter box, and the multi-stage filtering mechanism comprises a plurality of multi-stage filtering frames.

[0009] By adopting the above technical scheme: the stirring reaction tank can stir the copper powder and the reaction solution, and then filter after the surface is coated with a silver layer; the graded filtration tank can grade and repeatedly filter the silver-coated copper powder solution; the circulation pipeline introduces the silver-coated copper powder solution into the graded filtration box through a centrifugal pump for filtration; at the same time, the silver-coated copper powder solution can be graded and repeatedly filtered through a multi-stage filtration mechanism to achieve the effect of thoroughly filtering the silver-coated copper powder; the multi-stage filtration mechanism can grade and repeatedly filter the silver-coated copper powder solution.

[0010] Further configuration: an upper feeding platform and a lower discharging platform for feeding and discharging the silver-coated copper powder solution are respectively provided at the top and bottom of the graded filter box; a through opening is provided near the upper feeding platform and the lower discharging platform of the graded filter box; the upper feeding platform and the lower discharging platform slide inside the through opening respectively, wherein the lower discharging platform is in the shape of a conical platform; a supporting fixing bar for supporting the lower discharging platform is provided near the through opening to the lower discharging platform; the upper feeding platform and the lower discharging platform are respectively detachably connected to the multi-stage filtration frame.

[0011] By adopting the above technical solution: the upper feeding table can feed the silver-coated copper powder solution, and the lower discharging table can discharge the silver-coated copper powder solution. The conical table shape can accelerate the discharging of the filtered silver-coated copper powder solution, and the supporting fixing bar can limit the position of the lower discharging to avoid the movement of the discharging position.

[0012] Further configuration: the multi-stage filtering mechanism includes several mobile support platforms for driving the multi-stage filtering frame to move and filter, a mobile groove is provided near the mobile support platform of the graded filtering box, the mobile support platform is slidably connected inside the mobile groove, the multi-stage filtering frame is provided near the mobile support platform with an embedding opening for supporting and fixing the multi-stage filtering frame, the multi-stage filtering frame is embedded in the mobile support platform, and the mobile grooves are respectively provided near the top and bottom of the mobile support platform with mobile cylinders for driving several mobile support platforms to move, and the mobile cylinders are electrically connected to the external access switch.

[0013] By adopting the above technical solution: the mobile support platform can support and fix the multi-stage filter frame, and by embedding a plurality of multi-stage filter frames one by one on the mobile support platform, the multi-stage filter frame can be supported and fixed, the mobile cylinder can drive the mobile support platform to move, and at the same time can drive the multi-stage filter frame to move, and the multi-layer filter frame can be moved a close distance for filtering to avoid splashing of the silver-coated copper powder solution during filtration.

[0014] Further configuration: a filter port is provided inside the multi-stage filter frame, a filter element plate for filtering the silver-coated copper powder solution is provided inside the filter port, a sliding port is provided near the filter port of the multi-stage filter frame for pushing the filter element plate out of the multi-stage filter frame for replacing the filter membrane, the filter element plate is slidably connected inside the sliding port, a notch is provided at a position of the movable support platform near the filter element plate, a sliding cylinder for pushing the filter element plate to move inside the sliding port is provided inside the notch, the sliding cylinder is embedded in the notch, a placement groove for placing the filtered silver-coated copper powder is provided inside the filter element plate, and a clamping block for clamping the filter membrane inside the filter element plate is provided inside the placement groove.

[0015] By adopting the above technical scheme: the filter port can filter through the silver-coated copper powder solution, and filter through the filter element plate inside the multi-stage filter frame. The sliding cylinder inside the mobile support platform can drive the filter element plate to move inside the sliding port, so that the filter element plate can be pushed out of the multi-stage filter frame after the filtration is completed, and the silver-coated copper powder filter residue can be collected and the filter membrane in the filter element plate can be replaced. The placement groove can collect the filtered silver-coated copper powder, and the clamping block can clamp and fix the filter membrane inside the filter element plate, and it is convenient to replace the filter membrane inside the filter element plate.

[0016] It is further arranged that a plurality of slots are arranged on a side of the mobile support platform opposite to the adjacent mobile support platform, and series springs for connecting the plurality of mobile support platforms are respectively arranged inside the slots.

[0017] By adopting the above technical solution: the series spring inside the slot can connect each multi-stage filter frame, and through the connection of the series springs, when the mobile cylinder drives the top and bottom mobile support platforms to move, different mobile support platforms can be pulled to move simultaneously, thereby facilitating the collection of silver-coated copper powder filter residues inside the multi-stage filter frame and the replacement of the filter membrane in the filter element plate.

[0018] Further configuration: a collecting box for collecting the filtered silver-coated copper powder solution is provided at the bottom of the lower discharging platform.

[0019] By adopting the above technical solution: the solution wastewater filtered inside the lower discharge platform inside the collecting box is collected.

[0020] Compared with the prior art, the beneficial effects of the utility model are: it aims to repeatedly filter the silver-coated copper powder solution after the reaction is completed in layers, improve the effectiveness and efficiency of the filtration of the silver-coated copper powder solution through multi-stage filtration, improve the filter residue collection capacity of the silver-coated copper powder solution, avoid the loss of silver-coated copper powder caused by incomplete filtration, and at the same time can intelligently and quickly replace the filter membrane inside the multi-stage filter and collect the filter residue, reducing the cumbersomeness of the silver-coated copper powder solution filtration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0022] Figure 1 This is an external schematic diagram of an intelligent filtering and storage device for producing photovoltaic conductive powder according to the utility model;

[0023] Figure 2 This is a partial cross-sectional view of an intelligent filtering and storage device for producing photovoltaic conductive powder according to the utility model;

[0024] Figure 3 This is a cross-sectional view of an intelligent filtering and storage device for photovoltaic conductive powder production according to the utility model. Figure 1 ;

[0025] Figure 4 This is a cross-sectional view of an intelligent filtering and storage device for photovoltaic conductive powder production according to the utility model. Figure 2 .

[0026] In the figure, 1. stirring reaction tank; 2. graded filter box; 3. circulation pipeline; 4. multi-stage filter frame; 5. upper feeding platform; 6. lower discharging platform; 7. collecting box; 8. moving support platform; 9. moving cylinder; 10. series spring; 11. filter element plate; 12. placement groove; 13. sliding cylinder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 4In an embodiment of the utility model, an intelligent filtering and storage device for producing photovoltaic conductive powder is provided. The device includes a stirring reaction tank 1 for stirring and reacting the copper powder by coating the silver layer and a graded filter box 2 for multiple filtering of the silver-coated copper powder. The graded filter box 2 is provided with a door that is easy to open. The stirring reaction tank 1 can stir the copper powder and the reaction solution and then coat the surface with a silver layer for filtering. The graded filter tank can grade and repeatedly filter the silver-coated copper powder solution. A circulation pipeline 3 for conveying the silver-coated copper powder solution is provided between the stirring reaction tank 1 and the graded filter box 2. The circulation pipeline 3 introduces the silver-coated copper powder solution into the graded filter box 2 for filtration through a centrifugal pump. At the same time, the silver-coated copper powder solution can be graded and repeatedly filtered through a multi-stage filtration mechanism to achieve the effect of thoroughly filtering the silver-coated copper powder.

[0029] A multi-stage filtering mechanism for performing graded and repeated filtering on the silver-coated copper powder solution is arranged inside the graded filtering box 2 , and the multi-stage filtering mechanism includes a plurality of multi-stage filtering frames 4 .

[0030] An upper feeding platform 5 and a lower discharging platform 6 for feeding and discharging the silver-coated copper powder solution are respectively provided at the top and bottom of the graded filter box 2. A through opening is provided near the upper feeding platform 5 and the lower discharging platform 6 of the graded filter box 2. The upper feeding platform 5 and the lower discharging platform 6 slide inside the through opening respectively, wherein the lower discharging platform 6 is in a conical table shape. A supporting fixing bar for supporting the lower discharging platform 6 is provided near the through opening to the lower discharging platform 6. The upper feeding platform 5 and the lower discharging platform 6 are respectively detachably connected to the multi-stage filtration frame 4. A collecting box 7 for collecting the filtered silver-coated copper powder solution is provided at the bottom of the lower discharging platform 6. The solution wastewater filtered inside the lower discharging platform 6 inside the collecting box 7 is collected.

[0031] The upper feeding table 5 can feed the silver-coated copper powder solution, and the lower discharging table 6 can discharge the silver-coated copper powder solution. The conical table shape can accelerate the discharging of the filtered silver-coated copper powder solution, and the supporting fixing bar can limit the position of the lower discharging to prevent the discharging position from moving.

[0032] The multi-stage filtering mechanism includes several mobile support platforms 8 for driving the multi-stage filtering frame 4 to move and filter. A mobile groove is provided at a position near the mobile support platform 8 of the graded filtering box 2. The mobile support platform 8 is slidably connected inside the mobile groove. The multi-stage filtering frame 4 is provided with an embedding opening for supporting and fixing the multi-stage filtering frame 4 near the mobile support platform 8. The multi-stage filtering frame 4 is embedded on the mobile support platform 8. The mobile grooves are respectively provided with mobile cylinders 9 near the top and bottom of the mobile support platform 8 for driving several mobile support platforms 8 to move. The mobile cylinder 9 is electrically connected to the external access switch. The mobile support platform 8 is provided with several notches on the side opposite to the adjacent mobile support platform 8. The inside of the notches are respectively provided with series springs 10 for connecting several mobile support platforms 8.

[0033] The movable support platform 8 can support and fix the multi-stage filter frame 4. By embedding several multi-stage filter frames 4 one by one on the movable support platform 8, the multi-stage filter frame 4 can be supported and fixed. The movable cylinder 9 can drive the movable support platform 8 to move, and at the same time can drive the multi-stage filter frame 4 to move. The multi-layer filter frame is moved a close distance before filtering to avoid splashing of the silver-coated copper powder solution during filtration. The series spring 10 inside the slot can connect each multi-stage filter frame 4. Through the connection of the series spring 10, when the movable cylinder 9 drives the top and bottom movable support platforms 8 to move, different movable support platforms 8 can be pulled to move simultaneously, thereby facilitating the collection of the silver-coated copper powder filter residue inside the multi-stage filter frame 4 and the replacement of the filter membrane in the filter element plate 11.

[0034] A filter port is provided inside the multi-stage filter frame 4, and a filter plate 11 for filtering the silver-coated copper powder solution is provided inside the filter port. A sliding port is provided near the filter port of the multi-stage filter frame 4 for pushing the filter plate 11 out of the multi-stage filter frame 4 for replacing the filter membrane. The filter plate 11 is slidably connected inside the sliding port. A notch is provided at a position of the movable support platform 8 near the filter plate 11. A sliding cylinder 13 for pushing the filter plate 11 to move inside the sliding port is provided inside the notch. The sliding cylinder 13 is embedded in the notch. A placement groove 12 for placing the filtered silver-coated copper powder is provided inside the filter plate 11, and a clamping block for clamping the filter membrane inside the filter plate 11 is provided inside the placement groove 12.

[0035] The filter port can filter through the silver-coated copper powder solution and filter through the filter element plate 11 inside the multi-stage filter frame 4. The sliding cylinder 13 inside the mobile support platform 8 can drive the filter element plate 11 to move inside the sliding port, so that the filter element plate 11 can be pushed out of the multi-stage filter frame 4 after the filtration is completed, and the silver-coated copper powder filter residue can be collected and the filter membrane in the filter element plate 11 can be replaced. The placement groove 12 can collect the filtered silver-coated copper powder, and the clamping block can clamp and fix the filter membrane inside the filter element plate 11, and it is convenient to replace the filter membrane inside the filter element plate 11.

[0036] The working principle of the utility model is as follows: the operator turns on the moving cylinder 9 through an external access switch, and the moving cylinder 9 drives the moving support platform 8 to move, and can also drive the multi-stage filtering frame 4 to move, and the multi-layer filtering frame is moved to a close distance to prepare for filtering, and then the silver-coated copper powder solution inside the stirring reaction tank 1 is introduced into the upper feeding platform 5 inside the graded filtering box 2 through the circulation pipeline 3, and the upper feeding platform 5 performs a feeding operation on the silver-coated copper powder solution;

[0037] The silver-coated copper powder solution passes through the filter port inside the multi-stage filter frame 4, and the filter port can filter through the silver-coated copper powder solution, and is filtered through the filter core plate 11 inside the multi-stage filter frame 4. The placement groove 12 inside the filter core plate 11 can collect the filtered silver-coated copper powder. When the silver-coated copper powder solution is filtered through the multi-stage filter frame 4, the filtered silver-coated copper powder solution is discharged to the inside of the collection box 7 through the lower discharge platform 6, and the solution wastewater filtered inside the lower discharge platform 6 is collected;

[0038] After the silver-coated copper powder is filtered, the movable cylinder 9 is reopened. Through the connection of the series spring 10, when the movable cylinder 9 drives the top and bottom movable support platforms 8 to move, different movable support platforms 8 can be pulled to move simultaneously. Then the sliding cylinder 13 inside the movable support platform 8 is opened to drive the filter element plate 11 to move inside the sliding port, and the filter element plate 11 is pushed out of the multi-stage filter frame 4, so that the filter element plate 11 can be pushed out of the multi-stage filter frame 4 after the filtering is completed, so as to collect the silver-coated copper powder filter residue and replace the filter membrane in the filter element plate 11.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An intelligent filtering and storage device for producing photovoltaic conductive powder, characterized in that: The device comprises a stirring reaction tank (1) for stirring and reacting the silver-coated copper powder, and a graded filter box (2) for performing multiple filtrations on the silver-coated copper powder. A circulation pipeline (3) for conveying a silver-coated copper powder solution is provided between the stirring reaction tank (1) and the graded filter box (2). A multi-stage filtration mechanism for performing graded and repeated filtrations on the silver-coated copper powder solution is provided inside the graded filter box (2). The multi-stage filtration mechanism comprises a plurality of multi-stage filtration frames (4).

2. The intelligent filtering and storage device for producing photovoltaic conductive powder according to claim 1, characterized in that The top and bottom of the grading filter box (2) are respectively provided with an upper feeding platform (5) and a lower discharging platform (6) for feeding and discharging the silver-coated copper powder solution; the grading filter box (2) is provided with a through opening near the upper feeding platform (5) and the lower discharging platform (6); the upper feeding platform (5) and the lower discharging platform (6) are respectively slidable inside the through opening; the lower discharging platform (6) is in a conical platform shape; a support fixing bar for supporting the lower discharging platform (6) is provided near the through opening; the upper feeding platform (5) and the lower discharging platform (6) are respectively detachably connected to the multi-stage filtration frame (4).

3. The intelligent filtering and storage device for producing photovoltaic conductive powder according to claim 1, characterized in that The multi-stage filtering mechanism comprises a plurality of movable support platforms (8) for driving the multi-stage filtering frame (4) to move and filter; a movable groove is provided at a position close to the movable support platform (8) of the graded filtering box (2); the movable support platform (8) is slidably connected inside the movable groove; a mounting opening for supporting and fixing the multi-stage filtering frame (4) is provided at a position close to the movable support platform (8); the multi-stage filtering frame (4) is embedded on the movable support platform (8); a movable cylinder (9) for driving the plurality of movable support platforms (8) to move is provided at a position close to the top and bottom of the movable support platform (8); the movable cylinder (9) is electrically connected to an external access switch.

4. The intelligent filtering and storage device for producing photovoltaic conductive powder according to claim 1, characterized in that The multi-stage filter frame (4) is provided with a filter port inside, and a filter plate (11) for filtering the silver-coated copper powder solution is provided inside the filter port. A sliding port is provided near the filter port of the multi-stage filter frame (4) for pushing the filter plate (11) out of the multi-stage filter frame (4) for replacing the filter membrane. The filter plate (11) is slidably connected inside the sliding port. A notch is provided near the filter plate (11) of the movable support platform (8). A sliding cylinder (13) is provided inside the notch for pushing the filter plate (11) to move inside the sliding port. The sliding cylinder (13) is embedded inside the notch. A placement groove (12) for placing the filtered silver-coated copper powder is provided inside the filter plate (11). A clamping block for clamping the filter membrane inside the filter plate (11) is provided inside the placement groove (12).

5. The intelligent filtering and storage device for producing photovoltaic conductive powder according to claim 3, characterized in that The movable support platform (8) is provided with a plurality of slots on a side opposite to an adjacent movable support platform (8), and series springs (10) for connecting the plurality of movable support platforms (8) are provided inside the slots.

6. The intelligent filtering and storage device for producing photovoltaic conductive powder according to claim 2, characterized in that A collecting box (7) for collecting the filtered silver-coated copper powder solution is provided at the bottom of the lower discharge platform (6).

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