Double suction filtration device for conductive silver paste

Abstract

The utility model discloses a conductive silver paste double suction filtration device which comprises a metal frame, a first suction filtration tank is fixedly arranged on the metal frame, a second suction filtration tank is fixedly arranged at the upper end of the first suction filtration tank through bolts, a feeding tank is fixedly arranged at the upper end of the second suction filtration tank through bolts, and a conical storage hopper is arranged at the bottom of the first suction filtration tank. A coarse screening assembly is arranged between the feeding tank and the second suction filtration tank, a fine screening assembly is arranged between the second suction filtration tank and the first suction filtration tank, and the side face of the first suction filtration tank and the side face of the second suction filtration tank are each provided with a vacuumizing valve used for being connected with an external vacuumizing pump. Impurities and silver sheets are prevented from leaking through a screen mesh, so that the quality of materials is reduced, the quality of slurry filtered twice is finer and smoother, discharged materials can be cleaner through the conical bottom, the structure is convenient to disassemble, and if only one-time filtering is needed, only the first suction filtration tank, the fine screening assembly and the feeding tank need to be installed for use.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive silver paste filtering devices, and specifically refers to a double suction filtration device for conductive silver paste. Background Art

[0002] After the conductive silver paste is prepared, it needs to be filtered. Most of the existing filtering devices are cylindrical sealed tanks with an arc-shaped bottom and a discharge port added. The structure is that a filtering tray and a filter mesh cloth are installed on the top of the cylindrical tank body, and then a sealing ring is used to seal the upper part and press a cylindrical basin to place the slurry, and a motor is installed above to drive the stirring shaft to stir and filter.

[0003] After the silver paste is filtered, due to its viscous characteristics, when the slurry flows through the bottom arc and then discharges from the discharge port, the slurry cannot be completely discharged due to viscosity. Some slurries need secondary filtration. Before the secondary filtration, the slurry filtered for the first time must be discharged and collected before the second filtration, which is very time-consuming and laborious. Installing a motor above for stirring and filtering, impurities are easily squeezed through the filter mesh during the stirring process, resulting in product quality problems. Content of the Utility Model

[0004] (I) Technical Problem

[0005] The utility model provides a double suction filtration device for conductive silver paste, aiming to solve the problems that the traditional filtration device has incomplete discharge and easy residue, and impurities leak through the screen, resulting in quality decline.

[0006] (II) Technical Content

[0007] To solve the above technical problems, the technical solution of the utility model is: a double suction filtration device for conductive silver paste, including a metal frame, a first suction filtration tank is fixedly arranged on the metal frame, a second suction filtration tank is fixedly arranged at the upper end of the first suction filtration tank through bolts, a feeding tank is fixedly arranged at the upper end of the second suction filtration tank through bolts, the first suction filtration tank, the second suction filtration tank and the feeding tank are communicated in sequence, the upper end of the feeding tank is open, a conical storage hopper is arranged at the bottom of the first suction filtration tank, and a valve is arranged at the bottom outlet of the conical storage hopper. A coarse screen assembly is arranged between the feeding tank and the second suction filtration tank, a fine screen assembly is arranged between the second suction filtration tank and the first suction filtration tank, and vacuum extraction valves for connecting an external vacuum pump are arranged on the sides of the first suction filtration tank and the second suction filtration tank.

[0008] Further, the coarse screen assembly includes a first sealing ring, a first filtration tray, a coarse screen filter mesh cloth and a second sealing ring which are sequentially placed from bottom to top between the feeding tank and the second suction filtration tank.

[0009] Further, the fine screen assembly includes a third sealing ring, a second filtration tray, a fine screen filter mesh cloth and a fourth sealing ring which are sequentially placed from bottom to top between the second suction filtration tank and the first suction filtration tank.

[0010] Furthermore, universal wheels are fixedly provided at the four corners of the bottom of the metal frame.

[0011] Furthermore, the vacuum extraction valve is communicated with an external vacuum extraction pump through a vacuum extraction pipe, and a vacuum pressure gauge is connected to the vacuum extraction pipe.

[0012] (III) Technical effects

[0013] The advantages of the present utility model compared with the prior art are as follows: The slurry is filtered by means of vacuum extraction, reducing the contact with the finished material, which can reduce the possibility of the material being contaminated, and will not cause impurities and silver flakes to pass through the sieve mesh, resulting in a decline in the material quality. The slurry quality after two - stage filtration is more delicate and smooth, and the conical bottom can make the discharging cleaner. The structure is convenient for disassembly. For example, in the case of single - stage filtration, only the first suction filtration tank, the fine sieve assembly and the feeding tank need to be installed for use. Description of the drawings

[0014] Figure 1 is the explosion diagram of the present utility model.

[0015] Figure 2 is the structural schematic diagram of the first filtration tray of the present utility model.

[0016] Figure 3 is the structural schematic diagram of the first sealing ring of the present utility model.

[0017] Figure 4 is the structural schematic diagram of the positions of the feeding tank and the second suction filtration tank of the present utility model.

[0018] Figure 5 is the structural schematic diagram of the first suction filtration tank of the present utility model.

[0019] As shown in the figure: 1. Feeding tank; 2. Second sealing ring; 3. Coarse sieve filter cloth; 4. First filtration tray; 5. Vacuum pressure gauge; 6. Second suction filtration tank; 7. First suction filtration tank; 8. Metal frame; 9. Universal wheel; 10. Valve; 11. Vacuum extraction valve; 12. Vacuum extraction pipe; 2.1. First sealing ring; 2.2. Fourth sealing ring; 2.3. Third sealing ring; 4.1. Second filtration tray; 1.1, 1.2, 6.1, 6.2, 6.3, 6.4, 7.1, 7.2 are all bolt holes. Detailed implementation manners

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "provided with", "installed", "connected", "coupled", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] The following further details the present utility model with reference to the drawings.

[0023] Combined with the attached Figure 1 to the attached Figure 5 A double vacuum filtration device for conductive silver paste, comprising a metal frame 8. A first vacuum filtration tank 7 is fixedly provided on the metal frame 8. A second vacuum filtration tank 6 is fixedly provided at the upper end of the first vacuum filtration tank 7 by bolts. A feeding tank 1 is fixedly provided at the upper end of the second vacuum filtration tank 6 by bolts. The first vacuum filtration tank 7, the second vacuum filtration tank 6 and the feeding tank 1 are communicated in sequence. The upper end of the feeding tank 1 is open. A conical storage hopper is provided at the bottom of the first vacuum filtration tank 7. A valve 10 is provided at the bottom outlet of the conical storage hopper. A coarse sieve assembly is provided between the feeding tank 1 and the second vacuum filtration tank 6. A fine sieve assembly is provided between the second vacuum filtration tank 6 and the first vacuum filtration tank 7. Vacuum extraction valves 11 for connecting an external vacuum pump are provided on the sides of both the first vacuum filtration tank 7 and the second vacuum filtration tank 6.

[0024] The coarse sieve assembly includes a first sealing ring 2.1, a first filter tray 4, a coarse sieve filter mesh 3 and a second sealing ring 2 which are sequentially placed from bottom to top between the feeding tank 1 and the second vacuum filtration tank 6.

[0025] The fine sieve assembly includes a third sealing ring 2.3, a second filter tray 4.1, a fine sieve filter mesh 3.1 and a fourth sealing ring 2.2 which are sequentially placed from bottom to top between the second vacuum filtration tank 6 and the first vacuum filtration tank 7.

[0026] Universal wheels 9 are fixedly provided at the four corners of the bottom of the metal frame 8 to facilitate the quick movement of the entire device.

[0027] The vacuum extraction valve 11 is communicated with an external vacuum pump through a vacuum extraction pipe 12, and a vacuum pressure gauge 5 is connected to the vacuum extraction pipe 12.

[0028] Specific embodiments of the present utility model: The present utility model is assembled before use. The first filter tank 7 is welded on the metal frame 8, and universal wheels 9 are fixed at the bottom of the metal frame 8 as a movable base. First, a third sealing ring 2.3 is placed on the metal edge extending above the first filter tank 7, then a second filter tray 4.1 is placed, and then the fine sieve filter cloth 3.1 is placed on the second filter tray 4.1. A fourth sealing ring 2.2 is placed on the fine sieve filter cloth 3.1 (the positions of the third sealing ring 2.3 and the fourth sealing ring 2.2 should be aligned as much as possible). The second filter tank 6 is placed as a whole and aligned on the fourth sealing ring 2.2. At the same time, the four reserved screw holes of the screw hole 6.3 and the screw hole 7.2, and the screw hole 6.2 and the screw hole 7.1 also need to be aligned. Then, screws and nuts are used to pass through the screw holes to achieve the sealing and pressing of the second filter tank 6 to the first filter tank 7, and the fine sieve assembly is pressed and fixed by the second filter tank 6 to the first filter tank 7. The first sealing ring 2.1 is placed flat on the inner side of the metal edge extending above the second filter tank 6, then the first filter tray 4 is placed, the coarse sieve filter cloth 3 is placed on the first filter tray 4, and the second sealing ring 2 is placed above (the second sealing ring needs to be aligned vertically with the first sealing ring 2.1 as much as possible). The feeding tank 1 is placed on the top. At the same time, the screw hole 1.1 and the screw hole 6.1, and the screw hole 1.2 and the screw hole 6.4 need to be aligned, and screws and nuts are installed to keep it sealed. The coarse sieve assembly is pressed and fixed by the second filter tank 6 and the feeding tank 1. In the first step, coarse filtration is carried out. The vacuum extraction pipe 12 and the pressure detection table 5 are connected to the vacuum extraction valve 11 on the second filter tank 6. The other end of the vacuum extraction pipe 12 is communicated with an external vacuum pump for filtration. After the first step of filtration, the vacuum extraction pipe 12 and the pressure detection table 5 are connected to the vacuum extraction valve 11 on the first filter tank 7, and then the slurry can be directly subjected to secondary vacuum filtration.

[0029] The slurry that needs to be subjected to secondary filtration is first filtered through the upper coarse filtration component by means of vacuum extraction, and the slurry automatically flows into the lower second filter tank 6. Then, the vacuum extraction pipe 12 is inserted into the vacuum extraction valve 11 of the first filter tank 7, and the vacuum extraction filtration of the fine sieve component can be directly carried out. This saves the time and labor required for pouring and discharging materials in the existing device. The double-layer vacuum extraction filtration method is used to make the filtered slurry more delicate. A conical storage hopper is adopted at the bottom. The conical funnel-shaped storage hopper can make the slurry in the tank flow out better during discharging, and can greatly reduce the residual materials inside.

[0030] The above description is made for the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design without creativity a structural manner and embodiments similar to the technical solution without departing from the purpose of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A conductive silver paste double filtration device, comprising a metal frame (8), on which a first filtration tank (7) is fixedly arranged, characterized in that: A second suction tank (6) is fixedly provided at the upper end of the first suction tank (7) by means of bolts, and a feeding tank (1) is fixedly provided at the upper end of the second suction tank (6) by means of bolts. The first suction tank (7), the second suction tank (6) and the feeding tank (1) are connected in sequence, the upper end of the feeding tank (1) is open, a conical storage hopper is provided at the bottom of the first suction tank (7), and a valve (10) is provided at the outlet of the bottom of the conical storage hopper. A coarse screen assembly is provided between the feeding tank (1) and the second suction tank (6), and a fine screen assembly is provided between the second suction tank (6) and the first suction tank (7). Vacuum valves (11) for connecting to an external vacuum pump are provided on the sides of the first suction tank (7) and the second suction tank (6).

2. A conductive silver paste double filtration device according to claim 1, characterized in that: The coarse screen assembly comprises a first sealing ring (2.1), a first filter tray (4), a coarse screen filter cloth (3) and a second sealing ring (2) which are sequentially placed between a feed tank (1) and a second suction tank (6) from bottom to top.

3. A conductive silver paste double filtration device according to claim 1, characterized in that: The fine screen assembly comprises a third sealing ring (2.3), a second filter tray (4.1), a fine screen filter cloth (3.1) and a fourth sealing ring (2.2) which are sequentially placed between the second suction tank (6) and the first suction tank (7) from bottom to top.

4. A conductive silver paste double filtration device according to claim 1, characterized in that: Universal wheels (9) are fixedly provided at the four corners of the bottom of the metal frame (8).

5. A conductive silver paste double filtration device according to claim 1, characterized in that: The vacuum valve (11) is connected to an external vacuum pump via a vacuum pipe (12), and a vacuum pressure gauge (5) is connected to the vacuum pipe (12).

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