Photovoltaic silver paste production filtering device

Abstract

The utility model discloses a photovoltaic silver paste production filtering device which comprises an outer cylinder body, an inner cylinder body and a stirring structure, wherein at least one layer of first-stage filter screen is configured in the inner cylinder, a second-stage filter screen is formed at the bottom of the inner cylinder, a third-stage filter screen is formed at the bottom of the inner cylinder in the outer cylinder, a first-stage filter area is formed between the first-stage filter screen and the inner cylinder, a second-stage filter area is formed between the second-stage filter screen and the first-stage filter screen, and a third-stage filter area is formed between the second-stage filter screen and the third-stage filter screen. A third-stage filter area is formed between the third-stage filter screen and the outer barrel; wherein the hole diameters of the first-stage filter screen, the second-stage filter screen and the third-stage filter screen are sequentially reduced, and side holes with the same hole diameter as the third-stage filter screen are formed in the side wall, corresponding to the first-stage filter area and the second-stage filter area, of the inner cylinder body; the utility model can solve the problems that the traditional silver paste filtering equipment needs to filter the silver paste material layer by layer, the silver paste filtering rate is low, and the silver paste yield is not favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic silver paste, in particular to a photovoltaic silver paste production filtering device. Background Art

[0002] Silver paste is a slurry for making silver electrodes. It is made of silver or its compounds, flux, adhesive and diluent. In the production process of photovoltaic silver paste, the purpose of silver paste filtration is mainly to intercept materials with particle sizes larger than the standard requirements, so as to ensure the consistency of product fineness and avoid the presence of materials with overly large or uneven particles in the produced photovoltaic silver paste, which will affect the uneven distribution of the motor caused by the printing of silver paste on the surface of solar cells, and then affect the conductivity and conversion efficiency of the battery.

[0003] The traditional method of filtering silver paste is usually multi-stage negative pressure filtration. However, when the silver paste material passes through filters of different pore sizes in turn, since smaller particles of silver paste still exist, the smaller particles still need to be screened layer by layer with the larger particles. This will cause the silver paste filtration rate to decrease, which is not conducive to increasing the silver paste output. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a photovoltaic silver paste production filtering device.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model includes an outer cylinder, an inner cylinder arranged in the outer cylinder, and a stirring structure arranged on the outer cylinder and passing through the inner cylinder;

[0006] Wherein, at least one primary filter is arranged in the inner cylinder, a secondary filter is formed at the bottom of the inner cylinder, a tertiary filter is formed in the outer cylinder at the bottom of the inner cylinder, a primary filter area is formed between the primary filter and the inner cylinder, a secondary filter area is formed between the secondary filter and the primary filter, and a tertiary filter area is formed between the tertiary filter and the outer cylinder;

[0007] Among them, the apertures of the primary filter, the secondary filter and the tertiary filter decrease in sequence, and the side walls of the inner cylinder corresponding to the primary filter area and the secondary filter area are provided with side holes with the same aperture as the tertiary filter.

[0008] In the preferred technical solution of the above-mentioned photovoltaic silver paste production filtration device, the stirring structure includes a driving motor installed on the top of the outer cylinder, a rotating shaft configured on the driving motor and a paddle installed on the rotating shaft, wherein the paddle is distributed in the primary filtration zone, the secondary filtration zone and the tertiary filtration zone.

[0009] In the preferred technical solution of the photovoltaic silver paste production filtration device, the three-stage filtration zone is provided with a scraping component for scraping off the silver paste liquid attached to the inner wall of the outer cylinder and the outer wall of the inner cylinder.

[0010] In the preferred technical solution of the photovoltaic silver paste production and filtration device, the scraping component includes:

[0011] an annular scraper, the annular scraper is arranged between the outer cylinder and the inner cylinder;

[0012] A screw, the screw being rotatably mounted on the outer cylinder and being threadedly connected to the annular scraper;

[0013] A servo motor, wherein the driving shaft end of the servo motor is connected to the bottom end of the screw rod.

[0014] In the preferred technical solution of the above-mentioned photovoltaic silver paste production filtration device, the top of the annular scraper is configured as a slope surface, a feed channel is opened on the upper side of the inner cylinder, and the bottom end of the annular scraper slope surface is opposite to the feed channel.

[0015] In the preferred technical solution of the photovoltaic silver paste production and filtration device, the annular scraper, the inner wall of the outer cylinder and the surface of the inner cylinder are all sprayed with a polytetrafluoroethylene coating.

[0016] In the preferred technical solution of the photovoltaic silver paste production filtration device, the upper side wall of the outer cylinder is provided with a cleaning pipe connected to the three-stage filtration zone.

[0017] In the preferred technical solution of the photovoltaic silver paste production filtration device described above, the bottom of the outer cylinder is a conical structure.

[0018] In the preferred technical solution of the above photovoltaic silver paste production filtration device, a movable roller is installed at the bottom of the outer cylinder.

[0019] In the preferred technical solution of the above-mentioned photovoltaic silver paste production filtration device, the three-stage filter screen is one of a planar structure, a conical structure, and a bowl-shaped structure.

[0020] The beneficial effect of the utility model is that, while the present application filters the silver paste material in the primary filtration area through the primary filter screen and filters the silver paste material in the secondary filtration area through the secondary filter screen, the silver paste material is screened by using the side holes with the same aperture as the tertiary filter screen on the side of the inner cylinder, so that the silver paste filtrate in the primary filtration area and the secondary filtration area that meets the filtering requirements of the tertiary filter screen is directly transported to the tertiary filtration area, reducing the problem of small-particle silver paste materials always being in a filtering state, improving the filtration efficiency of the silver paste materials, and having practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is the front view of the utility model;

[0022] Figure 2 It is a side view of the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the inner cylinder;

[0025] Figure 5 is a cross-sectional view of the inner cylinder;

[0026] Figure 6 The structure of the annular scraper Figure 1 ;

[0027] Figure 7 The structure of the annular scraper Figure 2 ;

[0028] In the figure: outer cylinder 1, inner cylinder 2, primary filter 3, secondary filter 4, tertiary filter 5, primary filter area 6, secondary filter area 7, tertiary filter area 8, side hole 9, feed port 11, discharge port 12, drive motor 13, rotating shaft 14, paddle 15, annular scraper 16, slope surface 161, screw 17, servo motor 18, feed channel 19. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0030] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figures 1 to 7As shown, the photovoltaic silver paste production and filtering device of the utility model includes an outer cylinder 1, an inner cylinder 2 arranged in the outer cylinder 1, and a stirring structure arranged on the outer cylinder 1 and passing through the inner cylinder 2.

[0033] See also Figures 3 to 5 The inner cylinder 2 is provided with a primary filter screen 3, a secondary filter screen 4 is formed at the bottom of the inner cylinder 2, and a tertiary filter screen 5 is formed in the outer cylinder 1 below the inner cylinder 2. The apertures of the primary filter screen 3, the secondary filter screen 4, and the tertiary filter screen 5 decrease successively, so that silver paste materials with different apertures can be filtered step by step; in the inner cylinder 2, a primary filter area 6 is formed between the primary filter screen 3 and the inner wall of the inner cylinder 2, a secondary filter area 7 is formed between the secondary filter screen 4 and the inner wall of the inner cylinder 2 and the primary filter screen 3, and a tertiary filter area 8 is formed between the outer wall of the inner cylinder 2, the inner wall of the outer cylinder 1 and the tertiary filter screen 5. The primary filter area 6, the secondary filter area 7 and the tertiary filter area 8 are all used for allowing silver paste filtrate to pass through.

[0034] See also Figures 3 to 5 A side hole 9 having the same aperture as the third-stage filter screen 5 is provided on the outer wall of the inner cylinder 2 at the portion corresponding to the primary filter area 6 and the secondary filter area 7, so as to directly filter the silver paste with particle size meeting the requirements in the primary filter area 6 and the secondary filter area 7.

[0035] See also Figures 1 to 3 The stirring structure is installed on the outer cylinder 1, and the stirring structure passes through the primary filtering area 6, the secondary filtering area 7 and the tertiary filtering area 8 in sequence. The stirring structure can stir and extrude the silver paste materials in the primary filtering area 6, the secondary filtering area 7 and the tertiary filtering area 8, thereby breaking up the large particles in the silver paste material, and pressurizing the silver paste material to quickly flow in each filtering area, thereby accelerating the filtering efficiency of the silver paste.

[0036] See also Figure 1 , Figure 2 The outer cylinder 1 has a feed port 11 at the top and a discharge port 12 at the bottom.

[0037] When filtering the silver paste, first, the silver paste material is passed through the feed port 11 of the outer cylinder 1 into the primary filter area 6, and the material that meets the filtering requirements of the primary filter screen 3 enters the secondary filter area 7 through the primary filter screen 3. At the same time, the material that meets the filtering requirements of the tertiary filter screen 5 flows into the tertiary filter area 8 through the side hole 9 on the primary filter area 6, and directly flows to the tertiary filter screen 5 for filtering again; the material that flows into the filter screen of the secondary filter area 7 and meets the filtering requirements of the secondary filter screen 4 is further finely screened through the secondary filter screen 4 to enter the tertiary filter area 8, and the material that meets the filtering requirements of the tertiary filter screen 5 flows into the tertiary filter area 8 through the side hole 9 on the secondary filter area 7. The silver paste material that is finally collected in the tertiary filter area 8 after passing through the primary filter area 6 and the secondary filter area 7 is filtered and screened by the tertiary filter screen 5, flows to the bottom of the outer cylinder 1 and is collected and stored through the discharge port 12.

[0038] The present application filters the silver paste material in the primary filter area 6 through the primary filter screen 3 and the silver paste material in the secondary filter area 7 through the secondary filter screen 4, and at the same time, uses the side hole 9 with the same aperture as the tertiary filter screen 5 on the side of the inner cylinder 2 to screen the silver paste material, so that the silver paste filtrate in the primary filter area 6 and the secondary filter area 7 that meets the filtering requirements of the tertiary filter screen 5 is directly transported to the tertiary filter area 8, thereby reducing the problem of small-particle silver paste materials always being in a filtering state, improving the filtering efficiency of the silver paste materials, and having practicality.

[0039] In one or more embodiments, the stirring structure includes a driving motor 13 installed on the top of the outer cylinder 1, a rotating shaft 14 configured on the driving motor 13, and a paddle 15 installed on the rotating shaft 14, wherein the paddle 15 is distributed in the primary filtration area 6, the secondary filtration area 7, and the tertiary filtration area 8.

[0040] See also Figure 3 , Figure 5 When the stirring structure is working, the driving motor 13 controls the rotating shaft 14 to rotate, and the rotating shaft 14 drives the paddle 15 to rotate in the primary filtering area 6, the secondary filtering area 7, and the tertiary filtering area 8, so as to stir the silver paste in the primary filtering area 6, the secondary filtering area 7, and the tertiary filtering area 8, and break up the large particles of silver paste materials. At the same time, it can provide pressure to the silver paste to make the silver paste flow quickly in the primary filtering area 6, the secondary filtering area 7, and the tertiary filtering area 8, thereby accelerating the filtering efficiency of the silver paste.

[0041] In one or more embodiments, a scraping assembly for scraping off the silver paste attached to the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2 is disposed in the tertiary filtration area 8. The scraping assembly includes: an annular scraper 16, a screw 17, and a servo motor 18. The annular scraper 16 is disposed between the outer cylinder 1 and the inner cylinder 2, the screw 17 is rotatably mounted on the outer cylinder 1, the screw 17 is threadedly connected to the annular scraper 16, and the drive shaft end of the servo motor 18 is connected to the bottom end of the screw 17.

[0042] See also Figures 3 to 5 In the initial state, the annular scraper 16 is placed at the top of the tertiary filtration area 8.

[0043] After the silver paste is filtered, the screw 17 is controlled to rotate by the servo motor 18 so that the annular scraper 16 whose inner wall fits the outer wall of the inner cylinder 2 and whose outer wall fits the inner wall of the outer cylinder 1 can scrape the inner cylinder 2 and the outer cylinder 1 from top to bottom to avoid the silver paste adhering to the inner cylinder 2 and the outer cylinder 1, affecting the next filtering of the silver paste, thereby improving the use effect of the present application.

[0044] In one or more embodiments, the top of the annular scraper 16 is configured as a slope surface 161 , a feed channel 19 is opened on the upper side of the inner cylinder 2 , and the bottom end of the slope surface 161 of the annular scraper 16 is opposite to the feed channel 19 .

[0045] See also Figure 3 , Figure 6 , Figure 7 The side view of the annular scraper 16 is an acute-angled triangle structure; the slope surface 161 formed on the top of the annular scraper 16 can guide the silver paste material on the top surface of the annular scraper 16, so that when the annular scraper 16 is at the top inside the tertiary filtration zone 8, the lowest end of the slope surface 161 of the annular scraper 16 is opposite to the feed channel 19, so that the silver paste material guided to the lowest end of the top of the annular scraper 16 can enter the primary filtration zone 6 through the feed channel 19, avoiding the problem of silver paste accumulating above the annular scraper 16.

[0046] In one or more embodiments, the annular scraper 16, the inner wall of the outer cylinder 1, and the surface of the inner cylinder 2 are all sprayed with polytetrafluoroethylene coating. Polytetrafluoroethylene has a certain self-lubricating effect. Through the above arrangement, the possibility of silver paste adhering to the annular scraper 16, the inner wall of the outer cylinder 1 and the surface of the inner cylinder 2 can be reduced, thereby improving the use effect of the present application.

[0047] In one or more embodiments, a cleaning pipe connected to the tertiary filtration area 8 is disposed on the upper side wall of the outer cylinder 1. The cleaning pipe is not shown in the drawings; one end of the cleaning pipe is connected to an external water supply device, and the other end extends above the tertiary filtration area 8. When cleaning the outer cylinder 1 and the inner cylinder 2, water is simultaneously introduced into the cleaning pipe and the feed port 11 at the top of the outer cylinder 1, and the stirring structure is controlled to work, so as to achieve a cleaning effect on the device.

[0048] In one or more embodiments, the bottom of the outer cylinder 1 is a conical structure. This arrangement facilitates the gathering and collection of the silver paste.

[0049] In one or more embodiments, a movable roller is installed at the bottom of the outer cylinder 1.

[0050] In one or more embodiments, the tertiary filter screen 5 is one of a planar structure, a conical structure, and a bowl-shaped structure.

[0051] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A photovoltaic silver paste production filtering device, characterized in that: It comprises an outer cylinder, an inner cylinder arranged in the outer cylinder, and a stirring structure arranged on the outer cylinder and passing through the inner cylinder; Wherein, at least one primary filter is arranged in the inner cylinder, a secondary filter is formed at the bottom of the inner cylinder, a tertiary filter is formed in the outer cylinder at the bottom of the inner cylinder, a primary filter area is formed between the primary filter and the inner cylinder, a secondary filter area is formed between the secondary filter and the primary filter, and a tertiary filter area is formed between the tertiary filter and the outer cylinder; Among them, the apertures of the primary filter, the secondary filter and the tertiary filter decrease in sequence, and the side walls of the inner cylinder corresponding to the primary filter area and the secondary filter area are provided with side holes with the same aperture as the tertiary filter.

2. The photovoltaic silver paste production filtering device according to claim 1, characterized in that: The stirring structure includes a driving motor installed on the top of the outer cylinder, a rotating shaft configured on the driving motor and blades installed on the rotating shaft, wherein the blades are distributed in the primary filtering area, the secondary filtering area and the tertiary filtering area.

3. The photovoltaic silver paste production and filtering device according to claim 1, characterized in that: The three-stage filtering area is provided with a scraping component for scraping off the silver slurry liquid attached to the inner wall of the outer cylinder and the outer wall of the inner cylinder.

4. The photovoltaic silver paste production and filtering device according to claim 3, characterized in that: The scraping assembly comprises: an annular scraper, the annular scraper is arranged between the outer cylinder and the inner cylinder; A screw, the screw being rotatably mounted on the outer cylinder and being threadedly connected to the annular scraper; A servo motor, wherein the driving shaft end of the servo motor is connected to the bottom end of the screw rod.

5. The photovoltaic silver paste production and filtering device according to claim 4, characterized in that: The top of the annular scraper is configured as a slope surface, and a feed channel is opened on the upper side of the inner cylinder, and the bottom end of the slope surface of the annular scraper is directly opposite to the feed channel.

6. The photovoltaic silver paste production and filtering device according to claim 4, characterized in that: The annular scraper, the inner wall of the outer cylinder and the surface of the inner cylinder are all sprayed with polytetrafluoroethylene coating.

7. The photovoltaic silver paste production and filtering device according to claim 1, characterized in that: The upper side wall of the outer cylinder is provided with a cleaning pipe connected to the three-stage filtering area.

8. The photovoltaic silver paste production and filtering device according to claim 1, characterized in that: The bottom of the outer cylinder is in a conical structure.

9. The photovoltaic silver paste production and filtering device according to claim 1, characterized in that: A movable roller is installed at the bottom of the outer cylinder.

10. The photovoltaic silver paste production and filtering device according to claim 1, characterized in that: The three-stage filter screen is one of a plane structure, a conical structure, and a bowl-shaped structure.

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