Silver powder preparation drying treatment device

Abstract

The utility model relates to a drying treatment device for silver powder preparation, which belongs to the technical field of silver powder preparation and comprises a drying barrel, a drying stirring mechanism is arranged on the drying barrel, and the drying stirring mechanism comprises a stirring motor and a microwave generator which are fixedly mounted at the top of the drying barrel. A rotating shaft penetrating into the drying barrel is fixedly mounted at the output end of the stirring motor, a first stirring transverse rod is fixedly mounted on the surface of the rotating shaft, a waveguide tube penetrating into the drying barrel is fixedly mounted on the lower surface of the microwave generator, and a second stirring transverse rod is fixedly mounted on the side surface of the interior of the drying barrel; and an electric heating wire is fixedly mounted in the second stirring cross rod. According to the drying treatment device for silver powder preparation, silver powder in the drying cylinder can be stirred by arranging the first stirring transverse rod and the second stirring transverse rod, the silver powder can be prevented from caking, meanwhile, the silver powder is heated through microwaves generated by the microwave generator, and the drying efficiency of the silver powder can be improved.

Description

Technical Field

[0001] This utility model relates to the field of silver powder preparation technology, specifically to a silver powder preparation and drying device. Background Technology

[0002] With the development of the times, conductor pastes are widely used in the electronics industry, and silver paste is one of the most widely used conductor pastes. Silver powder is the main material of electronic pastes used in electronic components. At present, the preparation method mostly uses chemical reduction method. The main process is the preparation of silver nitrate solution, preparation of strong reducing agent solution, dissolution of dispersant, dropwise addition of silver nitrate solution and strong reducing agent solution for reduction reaction. After the above reduction reaction is completed, after solid-liquid separation, it is repeatedly washed with deionized water solution until the conductivity is <20μS / cm. After removing the supernatant, silver powder with water content ≤20% is obtained. Then the silver powder needs to go through mixing, grinding, cooling, washing, filtering, drying and sieving.

[0003] Announcement No. CN219976989U discloses an ultrafine silver powder drying device, comprising a lifting mechanism, a turning mechanism, and a drying chamber. The lifting mechanism is located on the left side of the drying chamber, which includes a shell, a material tray, and a humidity detector. The material tray is located on the inner wall of the shell, and the humidity detector is located inside the shell. A second drive motor is fixed to the moving end of the lifting mechanism, and the rotating shaft is located inside the shell and fitted inside the material tray. A flexible scraper is fitted over the rotating shaft above the material tray, and the flexible scraper extends into the material tray. This invention uses far-infrared radiation as a heat source and utilizes an electric screw lifting and turning mechanism to achieve uniform and rapid heating of silver powder materials, resulting in high production efficiency. Moreover, the equipment has a simple structure and is easy to operate.

[0004] The aforementioned patent addresses the drawback of silver powder caking when using an electric heating drying oven to dry silver powder in the prior art. This application provides another implementation scheme to address the problem raised in the aforementioned patent. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a silver powder preparation and drying device that features uniform drying and is less prone to clumping, thus solving the problem of silver powder caking that easily occurs when using an electric heating blast drying oven to dry silver powder in existing technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silver powder preparation and drying device, comprising a drying barrel, wherein the drying barrel is provided with a drying stirring mechanism;

[0007] The drying and agitating mechanism includes an agitator motor and a microwave generator fixedly installed on the top of the drying barrel. A rotating shaft penetrating into the drying barrel is fixedly installed at the output end of the agitator motor. A first agitator crossbar is fixedly installed on the surface of the rotating shaft. A waveguide penetrating into the drying barrel is fixedly installed on the lower surface of the microwave generator. A second agitator crossbar is fixedly installed on the inner side surface of the drying barrel. A heating wire is fixedly installed inside the second agitator crossbar. A control box is fixedly installed on the outer surface of the drying barrel. The output end of the control box is electrically connected to the input end of the agitator motor and the microwave generator.

[0008] Furthermore, an air compressor is fixedly installed on the top of the drying barrel, and an air inlet pipe is fixedly installed at the output end of the air compressor, penetrating into the drying barrel. A one-way valve with its opening facing the bottom of the inner cavity of the drying barrel is fixed at the bottom of the air inlet pipe.

[0009] The beneficial effects of adopting the above-mentioned further solution are: by setting up an air compressor and an air inlet pipe, high-pressure gas can be injected into the drying barrel after the silver powder in the drying barrel has been dried, which can improve the flow rate and fluidity of the silver powder inside the drying barrel, making it easier to discharge the silver powder from the drying barrel.

[0010] Furthermore, two symmetrically distributed feed pipes are fixedly installed on the side surface of the drying barrel, a feed hopper is fixedly installed at the bottom of the feed pipe, and a sealing cap is threadedly connected to the top of the feed hopper.

[0011] The beneficial effect of adopting the above-mentioned further solution is that by setting up a feed pipe and a feed hopper, it is convenient to send the silver powder that needs to be dried into the drying barrel.

[0012] Furthermore, a pressure relief valve is fixedly installed on the surface of the feed pipe.

[0013] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the release of the pressure generated inside the drying barrel when drying silver powder, and can prevent the silver powder from being compacted due to excessive pressure inside the drying barrel.

[0014] Furthermore, there are ten first agitator crossbars, with five first agitator crossbars symmetrically distributed on the surface of the rotating shaft. There are eight second agitator crossbars, with four second agitator crossbars symmetrically distributed on the inner surface of the drying barrel. The second agitator crossbars are located between two adjacent first agitator crossbars.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that it facilitates the breaking up of the agglomerates inside the silver powder by means of the first and second stirring crossbars.

[0016] Furthermore, the bottom of the drying barrel is conical, and a discharge pipe is fixedly installed at the bottom of the drying barrel, with a shut-off valve fixedly installed at the bottom of the discharge pipe.

[0017] The advantage of adopting the above-mentioned further solution is that it facilitates the discharge of silver powder from the drying container.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] This silver powder preparation and drying device can stir the silver powder in the drying cylinder by setting a first stirring bar and a second stirring bar, which can prevent the silver powder from clumping. At the same time, it uses a microwave generator to generate microwaves to heat the silver powder, which can improve the drying efficiency of the silver powder. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the interior of the drying barrel of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the second stirring crossbar of the present invention.

[0022] In the diagram: 1. Drying drum; 2. Agitator motor; 3. Microwave generator; 4. Rotating shaft; 5. First agitator crossbar; 6. Waveguide; 7. Second agitator crossbar; 8. Heating wire; 9. Air compressor; 10. Air inlet pipe; 11. One-way valve; 12. Feed pipe; 13. Feed hopper; 14. Sealing cover; 15. Pressure relief valve; 16. Control box; 17. Discharge pipe; 18. Shut-off valve; 19. Support leg. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1, please refer to Figures 1 to 2This embodiment of a silver powder preparation and drying device includes a drying barrel 1. The drying barrel 1 is equipped with a drying agitation mechanism, which includes an agitation motor 2 and a microwave generator 3 fixedly installed on the top of the drying barrel 1. A rotating shaft 4, penetrating into the drying barrel 1, is fixedly installed at the output end of the agitation motor 2. A first agitation crossbar 5 is fixedly installed on the surface of the rotating shaft 4. A waveguide 6, penetrating into the drying barrel 1, is fixedly installed on the lower surface of the microwave generator 3. A second agitation crossbar 7 is fixedly installed on the inner side surface of the drying barrel 1, and a heating wire is fixedly installed inside the second agitation crossbar 7. 8. A control box 16 is fixedly installed on the outer surface of the drying barrel 1. The output end of the control box 16 is electrically connected to the input end of the stirring motor 2 and the microwave generator 3. There are ten first stirring crossbars 5, and five first stirring crossbars 5 are symmetrically distributed on the surface of the rotating shaft 4. There are eight second stirring crossbars 7, and four second stirring crossbars 7 are symmetrically distributed on the inner surface of the drying barrel 1. The second stirring crossbars 7 are located between two adjacent first stirring crossbars 5, so as to facilitate the breaking of the clumps inside the silver powder by the first stirring crossbars 5 and the second stirring crossbars 7.

[0025] An air compressor 9 is fixedly installed on the top of the drying barrel 1. An air inlet pipe 10 is fixedly installed at the output end of the air compressor 9, which penetrates into the drying barrel 1. A one-way valve 11 with its opening facing the bottom of the inner cavity of the drying barrel 1 is fixed at the bottom of the air inlet pipe 10. By setting the air compressor 9 and the air inlet pipe 10, high-pressure gas can be injected into the drying barrel 1 after the silver powder in the drying barrel 1 has been dried. This can improve the flow rate and fluidity of the silver powder inside the drying barrel 1, making it easier to discharge the silver powder from the drying barrel 1.

[0026] Two symmetrically distributed feed pipes 12 are fixedly installed on the side surface of the drying barrel 1. A feed hopper 13 is fixedly installed at the bottom of the feed pipe 12. A sealing cap 14 is threadedly connected to the top of the feed hopper 13. By setting the feed pipes 12 and the feed hopper 13, it is convenient to feed the silver powder to be dried into the drying barrel 1. A pressure relief valve 15 is fixedly installed on the surface of the feed pipe 12 to release the pressure generated inside the drying barrel 1 when drying the silver powder, which can prevent the silver powder from being compacted due to excessive pressure inside the drying barrel 1.

[0027] The bottom of the drying barrel 1 is conical, and a discharge pipe 17 is fixedly installed at the bottom of the drying barrel 1. A shut-off valve 18 is fixedly installed at the bottom of the discharge pipe 17 to facilitate the discharge of silver powder from the drying barrel 1.

[0028] The working principle of the above embodiments is as follows:

[0029] Silver powder is fed into the drying barrel 1 through the feed pipe 12 and feed hopper 13. The sealing cover 14 is then closed, and the stirring motor 2 and microwave generator 3 are started. The stirring motor 2 drives the rotating shaft 4 and the first stirring crossbar 5 to rotate. With the cooperation of the second stirring crossbar 7, the silver powder in the drying barrel 1 is stirred. The heating wire 8 is energized to heat the second stirring crossbar 7, thereby heating the silver powder. The microwaves generated by the microwave generator 3 are conducted into the drying barrel 1 through the waveguide 6 to heat and dry the silver powder. After the silver powder is dried, the shut-off valve 18 is opened, and the air compressor 9 is started to deliver high-pressure gas into the drying barrel 1, so that the silver powder can be discharged from the drying barrel 1 through the discharge pipe 17.

[0030] In Example 2, based on Example 1, the bottom of the drying barrel 1 in this example is fixedly equipped with a number of support legs 19 to facilitate the support of the drying barrel 1.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying apparatus for preparing silver powder, comprising a drying drum (1), characterized in that: The drying barrel (1) is equipped with a drying agitation mechanism; The drying and stirring mechanism includes a stirring motor (2) and a microwave generator (3) fixedly installed on the top of the drying barrel (1). A rotating shaft (4) penetrating into the drying barrel (1) is fixedly installed at the output end of the stirring motor (2). A first stirring crossbar (5) is fixedly installed on the surface of the rotating shaft (4). A waveguide (6) penetrating into the drying barrel (1) is fixedly installed on the lower surface of the microwave generator (3). A second stirring crossbar (7) is fixedly installed on the inner side surface of the drying barrel (1). An electric heating wire (8) is fixedly installed inside the second stirring crossbar (7). A control box (16) is fixedly installed on the outer surface of the drying barrel (1). The output end of the control box (16) is electrically connected to the input end of the stirring motor (2) and the microwave generator (3).

2. The silver powder preparation and drying apparatus according to claim 1, characterized in that: An air compressor (9) is fixedly installed on the top of the drying barrel (1). An air inlet pipe (10) is fixedly installed at the output end of the air compressor (9) and extends into the drying barrel (1). A one-way valve (11) with its opening facing the bottom of the inner cavity of the drying barrel (1) is fixed at the bottom of the air inlet pipe (10).

3. The silver powder preparation and drying apparatus according to claim 2, characterized in that: Two symmetrically distributed feed pipes are fixedly installed on the side surface of the drying barrel (1). A feed hopper (13) is fixedly installed at the bottom of the feed pipe (12). A sealing cap (14) is threadedly connected to the top of the feed hopper (13).

4. The silver powder preparation and drying apparatus according to claim 3, characterized in that: A pressure relief valve (15) is fixedly installed on the surface of the feed pipe (12).

5. The silver powder preparation and drying apparatus according to claim 1, characterized in that: There are ten first stirring crossbars (5), and five first stirring crossbars (5) are symmetrically distributed on the surface of the rotating shaft (4). There are eight second stirring crossbars (7), and four second stirring crossbars (7) are symmetrically distributed on the inner surface of the drying barrel (1). The second stirring crossbars (7) are located between two adjacent first stirring crossbars (5).

6. The silver powder preparation and drying apparatus according to claim 1, characterized in that: The bottom of the drying barrel (1) is conical, and a discharge pipe (17) is fixedly installed at the bottom of the drying barrel (1). A shut-off valve (18) is fixedly installed at the bottom of the discharge pipe (17).

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