A device and method for producing silver powder with controllable particle size

Abstract

The invention discloses a silver powder production device and method with controllable particle size. The device comprises: a main body, a stirring mechanism and a grinding mechanism. The main body comprises a distribution bin, a side wall of the distribution bin is fixedly connected with a feed port and a water inlet, the bottom of the distribution bin is fixedly connected with a grinding bin, the bottom of the grinding bin is fixedly connected with a discharge bin, the bottom of the discharge bin is provided with a discharge port, and the stirring mechanism comprises a driving motor, the driving motor is fixedly connected to the top center of the distribution bin, the driving motor shaft passes through the distribution bin and is rotatably connected to the distribution bin, and a rotating rod is provided in the distribution bin. The beneficial effects are: by setting the grinding mechanism, the silver powder is ground by using an incomplete spherical shell and a grinding disc, the grinding disc rotates while rotating, and the grinding direction changes continuously during grinding, so that the silver powder particles are avoided from being elongated. Compared with grinding with a grinding wheel, the consistency of the finished product particles is improved. At the same time, due to the fixed distance between the grinding disc and the grinding bin, the grinding accuracy is guaranteed compared with ball milling.

Description

Technical Field

[0001] The invention relates to the technical field of silver powder processing, and in particular to a silver powder production device and method with controllable particle size. Background Art

[0002] Silver powder is a fine particle powder made of metallic silver, usually silver-grey or silver-white in color. Silver powder has a wide range of uses in many industrial and scientific applications due to its high electrical and thermal conductivity, corrosion resistance and chemical stability.

[0003] Grinding is one of the common processes in silver powder processing, which is mainly carried out through ball milling and grinding wheel grinding. During ball milling, due to the uneven energy distribution between the grinding medium and the silver powder particles, it is difficult to achieve precise control of the particle size. Excessive grinding will make the particle size too small, while insufficient grinding will cause the particle size to be too large, ultimately leading to uneven particle size distribution, affecting the quality consistency of the silver powder product. During grinding with a grinding wheel, due to the single grinding direction of the grinding wheel, the silver powder particles are easily caused to become slender, which not only weakens the shape consistency of the particles, but also makes the particle size of the silver powder after grinding vary greatly, making it difficult to meet specific applications with high requirements on particle size and morphology, affecting the performance of the product. Therefore, a silver powder production device and method with controllable particle size are proposed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The present invention has been proposed in view of the above-mentioned problems.

[0006] Therefore, the object of the present invention is to provide a silver powder production device and method with controllable particle size, which is used to solve the problem that the existing grinding device is difficult to ensure uniform silver powder particle size.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: a silver powder production device with controllable particle size, comprising:

[0008] The main body comprises a material distribution bin, the side wall of which is fixedly connected with a material feed port and a water inlet, the bottom of which is fixedly connected with a grinding bin, the bottom of which is fixedly connected with a material discharge bin, and the bottom of which is provided with a material discharge port;

[0009] The stirring mechanism comprises a driving motor, the driving motor is fixedly connected to the top center of the material distribution bin, the driving motor shaft passes through the material distribution bin and is rotatably connected to the material distribution bin, a rotating rod is arranged in the material distribution bin, the rotating rod is fixedly connected to the bottom end of the driving motor shaft, and the rotating rod is fixedly connected to a stirring paddle;

[0010] The grinding mechanism comprises an incomplete spherical shell, which is arranged on the inner side of the grinding bin, the bottom end of the rotating rod is fixedly connected to the incomplete spherical shell, the outer wall of the incomplete spherical shell is fitted with the inner wall of the grinding bin, four groups of guide grooves are arranged on the outer side of the incomplete spherical shell, the tops of the four groups of guide grooves are connected to each other, a mounting cylinder is fixedly connected to the bottom of the incomplete spherical shell, a mounting block is arranged in the incomplete spherical shell, the mounting block is fixedly connected to the inner wall of the top of the incomplete spherical shell, the side walls of the mounting block facing the four groups of guide grooves are fixedly connected with connecting shafts, the outer sides of the four groups of connecting shafts are rotatably sleeved with primary bevel gears, and the inner sides of the four groups of guide grooves facing each group of primary bevel gears are A circular mounting opening is provided, and grinding discs are rotatably arranged on the inner sides of the four groups of mounting openings, the shape of the grinding discs matches the mounting opening, the distances between the outer sides of the grinding discs and the inner wall of the grinding bin are equal everywhere, the four groups of grinding discs are respectively fixedly connected to the sides of the four groups of primary bevel gears away from the mounting blocks, a secondary bevel gear is arranged under the mounting block, the four groups of grinding discs are meshed with the secondary bevel gears, a connecting column is fixedly connected to the bottom of the secondary bevel gears, the connecting column passes through the mounting cylinder and is rotatably connected to the mounting cylinder, a connecting block is fixedly connected to the bottom of the connecting column, three groups of fixing columns are fixedly connected to the side walls of the connecting block, and the ends of the three groups of fixing columns away from the connecting blocks are fixedly connected to the inner wall of the discharge bin.

[0011] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the main body also includes an annular tube, a nozzle and a water inlet pipe, the annular tube is sleeved on the outside of the discharge bin, the nozzles are provided in six groups, the six groups of nozzles are fixedly connected to the annular tube, the six groups of nozzles pass through the discharge bin and are fixedly connected to the discharge bin, and the water inlet pipe is fixedly connected to the annular tube.

[0012] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the six groups of nozzles are evenly distributed around the material bin, and the annular pipe, nozzles and water inlet pipe are all made of stainless steel.

[0013] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the main body also includes a fixed ring and support columns, the fixed ring is fixedly sleeved on the outside of the material distribution bin, and the support columns are provided in four groups, the four groups of support columns are fixedly connected to the bottom of the fixed ring and the four groups of support columns are equidistantly distributed.

[0014] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, wherein: the distribution bin, grinding bin, discharging bin, rotating rod and the axis of the driving motor shaft are arranged to coincide with each other, the axes of the incomplete spherical shell, mounting cylinder, secondary bevel gear, connecting column and connecting block are arranged to coincide with each other, and the four groups of grinding discs are arranged to coincide with the axes of the corresponding connecting shafts and primary bevel gears respectively.

[0015] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the stirring paddle is located near the bottom of the distribution bin, and the feed port and the water inlet are located near the top of the distribution bin.

[0016] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the four groups of guide grooves and the four groups of grinding discs are equidistantly arranged, and the guide groove walls, the outer walls of the grinding discs and the inner walls of the grinding chamber are all rough.

[0017] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the guide groove is located above the grinding disc and the groove depth gradually decreases from top to bottom, and the two sides of the grinding disc coincide with the groove walls on both sides of the corresponding guide groove.

[0018] As a preferred solution of the silver powder production device with controllable particle size described in the present invention, the outer dimension of the installation port is smaller than the inner dimension thereof, and the bottom of the discharge bin is bucket-shaped.

[0019] Based on the above silver powder production device, the present invention additionally provides a method for producing silver powder with controllable particle size, comprising the following steps:

[0020] S1, water is poured into the material distribution bin through the feed port, the driving motor drives the rotating rod to rotate, the rotating rod drives the stirring paddle and the incomplete spherical shell to rotate, the stirring paddle stirs the water body when rotating, and the water body in the material distribution bin rotates, the incomplete spherical shell drives the mounting block to rotate, the mounting block drives the four sets of connecting shafts to rotate, the four sets of connecting shafts drive the primary bevel gears to rotate, the four sets of connecting shafts rotate in coordination with the secondary bevel gears, the four sets of primary bevel gears drive the four sets of grinding discs to move synchronously, and the four sets of grinding discs rotate while rotating;

[0021] S2, pouring silver powder from the feed port into the distribution bin. After the silver powder enters the water, the large-particle silver powder is separated from the small-particle silver powder under the action of centrifugal force and gravity. The large-particle silver powder first enters the grinding bin with the water flow. After entering the grinding bin, the water flow brings the silver powder into four sets of guide grooves. The incomplete spherical shell rotates to grind the large-particle silver powder. The silver powder particle size gradually decreases. Under the action of water flow and gravity, the silver powder moves downward along the guide groove. When the silver powder moves to the grinding disc, the grinding disc grinds the silver powder. When the grinding disc grinds the silver powder, the grinding direction changes continuously. The small-particle silver powder directly passes through the guide groove with the water flow;

[0022] S3, after the silver powder is ground, it flows into the discharge bin with the water flow and is finally discharged from the discharge port of the discharge bin. The water inlet pipe is connected with the water supply pipe. The water flows through the water inlet pipe and the annular pipe in turn and then sprays out from the six groups of nozzles to flush the discharge bin;

[0023] S4, drying the silver powder output from the discharge port of the discharge bin to complete the processing.

[0024] Beneficial effects of the present invention:

[0025] 1. The grinding mechanism is set up to grind the silver powder by using the incomplete spherical shell and the grinding disc. The grinding disc rotates while rotating, and the grinding direction changes continuously during grinding, which avoids the elongation of the silver powder particles. Compared with grinding wheel grinding, the consistency of the finished particles is improved. At the same time, due to the fixed distance between the grinding disc and the grinding chamber, the grinding accuracy is guaranteed compared with ball milling.

[0026] 2. By setting up a stirring mechanism and using a stirring paddle to stir the water, centrifugal force and gravity are used to separate the larger silver powder particles from the smaller silver powder particles. The larger silver powder particles are ground first to avoid excessive grinding of the smaller silver powder particles, which is beneficial to ensuring the consistency of the finished product particle size. At the same time, it is beneficial for the device to apply a more concentrated grinding force to the larger silver powder particles when grinding, thereby improving the grinding efficiency and reducing the overall grinding time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a silver powder production device with controllable particle size according to the present invention.

[0029] Figure 2 The present invention is a partial cross-sectional structural schematic diagram of a silver powder production device with controllable particle size.

[0030] Figure 3 For the present invention Figure 2 A magnified view of the structure of area A.

[0031] Figure 4 The present invention is a schematic diagram of the structure of the grinding bin and the discharging bin of a silver powder production device with controllable particle size.

[0032] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the grinding mechanism of a silver powder production device with controllable particle size.

[0033] Figure 6 The present invention is a schematic diagram of a three-dimensional cross-sectional structure of a grinding mechanism of a silver powder production device with controllable particle size.

[0034] Figure 7 For the present invention Figure 6 A magnified view of the structure of region B.

[0035] Figure 8 The present invention is a schematic diagram of a partial cross-sectional structure of a grinding mechanism of a silver powder production device with controllable particle size.

[0036] Description of the drawings: 100, main body; 101, distribution bin; 102, feed port; 103, water inlet; 104, grinding bin; 105, discharge bin; 106, fixing ring; 107, support column; 108, annular tube; 109, nozzle; 110, water inlet pipe; 200, stirring mechanism; 201, driving motor; 202, rotating rod; 203, stirring paddle; 300, grinding mechanism; 301, incomplete spherical shell; 301a, guide groove; 302, mounting cylinder; 303, mounting block; 304, connecting shaft; 305, primary bevel gear; 306, grinding disc; 307, secondary bevel gear; 308, connecting column; 309, connecting block; 310, fixing column. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] Example 1

[0042] A silver powder production device with controllable particle size, comprising:

[0043] The main body 100 includes a material distribution bin 101, a material feed port 102 and a water inlet 103 are fixedly connected to the side wall of the material distribution bin 101, a grinding bin 104 is fixedly connected to the bottom of the material distribution bin 101, a discharge bin 105 is fixedly connected to the bottom of the grinding bin 104, and a discharge port is arranged at the bottom of the discharge bin 105;

[0044] The stirring mechanism 200 includes a driving motor 201, which is fixedly connected to the top center of the sub-bin 101. The driving motor 201 has a rotating shaft that penetrates the sub-bin 101 and is rotatably connected to the sub-bin 101. A rotating rod 202 is provided in the sub-bin 101, and the rotating rod 202 is fixedly connected to the bottom end of the rotating shaft of the driving motor 201. The rotating rod 202 is fixedly connected to a stirring paddle 203.

[0045] The grinding mechanism 300 includes an incomplete spherical shell 301, which is arranged on the inner side of the grinding chamber 104. The bottom end of the rotating rod 202 is fixedly connected to the incomplete spherical shell 301, and the outer wall of the incomplete spherical shell 301 is fitted with the inner wall of the grinding chamber 104. Four groups of guide grooves 301a are opened on the outer side of the incomplete spherical shell 301, and the tops of the four groups of guide grooves 301a are connected to each other. The bottom of the incomplete spherical shell 301 is fixedly connected with a mounting cylinder 302, and a mounting block 303 is arranged in the incomplete spherical shell 301. The mounting block 303 is fixedly connected to the inner wall of the top of the incomplete spherical shell 301, and the side walls of the mounting block 303 facing the four groups of guide grooves 301a are fixedly connected with connecting shafts 304, and the outer sides of the four groups of connecting shafts 304 are rotatably sleeved with primary bevel gears 305, and the inner sides of the four groups of guide grooves 301a face the respective groups of primary bevel gears 305. Circular mounting openings are provided at the positions of the four groups of mounting openings, and grinding discs 306 are rotatably arranged on the inner sides of the four groups of mounting openings, the shape of the grinding discs 306 matches the mounting openings, the outer sides of the grinding discs 306 are at equal distances from the inner walls of the grinding bin 104, the four groups of grinding discs 306 are respectively fixedly connected to the four groups of primary bevel gears 305 on the side away from the mounting block 303, a secondary bevel gear 307 is arranged below the mounting block 303, the four groups of grinding discs 306 are all meshed with the secondary bevel gear 307, a connecting column 308 is fixedly connected to the bottom of the secondary bevel gear 307, the connecting column 308 passes through the mounting cylinder 302 and is rotatably connected to the mounting cylinder 302, a connecting block 309 is fixedly connected to the bottom of the connecting column 308, and three groups of fixing columns 310 are fixedly connected to the side wall of the connecting block 309, and one end of the three groups of fixing columns 310 away from the connecting block 309 is fixedly connected to the inner wall of the discharge bin 105.

[0046] Among them, the main body 100 also includes an annular tube 108, a nozzle 109 and a water inlet pipe 110. The annular tube 108 is sleeved on the outside of the discharge bin 105. The nozzles 109 are provided with six groups. The six groups of nozzles 109 are fixedly connected with the annular tube 108. The six groups of nozzles 109 all penetrate the discharge bin 105 and are fixedly connected with the discharge bin 105. The water inlet pipe 110 is fixedly connected with the annular tube 108. The six groups of nozzles 109 are equidistantly distributed around the discharge bin 105 to ensure that various places in the discharge bin 105 can be flushed. The annular tube 108, the nozzles 109 and the water inlet pipe 110 are all made of stainless steel, which is corrosion-resistant.

[0047] In addition, the main body 100 also includes a fixing ring 106 and a support column 107. The fixing ring 106 is fixedly mounted on the outside of the material distribution bin 101. There are four groups of support columns 107. The four groups of support columns 107 are all fixedly connected to the bottom of the fixing ring 106 and the four groups of support columns 107 are equidistantly distributed. The support columns 107 are used to support the device.

[0048] In addition, the distribution bin 101, the grinding bin 104, the discharging bin 105, the rotating rod 202 and the axis of the driving motor 201 are arranged to coincide with each other; the incomplete spherical shell 301, the mounting cylinder 302, the secondary bevel gear 307, the connecting column 308 and the connecting block 309 are arranged to coincide with each other; the four sets of grinding discs 306 are arranged to coincide with the axes of the corresponding connecting shafts 304 and the primary bevel gears 305, respectively, to ensure the structural stability of the device and guarantee the normal operation of the device.

[0049] Specifically, the stirring paddle 203 is located near the bottom of the distribution bin 101, and the feed port 102 and the water inlet 103 are located near the top of the distribution bin 101 to ensure maximum space utilization of the distribution bin 101. The four groups of guide grooves 301a and the four groups of grinding discs 306 are equidistantly arranged. The groove walls of the guide grooves 301a, the outer walls of the grinding discs 306 and the inner walls of the grinding bin 104 are all rough, and the rough surface is used to ensure the grinding effect.

[0050] It should be noted that the depth of the guide groove 301a located above the grinding disc 306 gradually decreases from top to bottom, the two sides of the grinding disc 306 coincide with the groove walls on both sides of the corresponding guide groove 301a, the outer dimension of the installation port is smaller than its inner dimension, and the gradient design is beneficial to prevent silver powder from entering the incomplete spherical shell 301, and the bottom of the discharge bin 105 is bucket-shaped, which is beneficial to ensure complete discharge.

[0051] Example 2

[0052] A method for producing silver powder with controllable particle size, based on Example 1, comprises the following steps:

[0053] S1, water is injected into the sub-bin 101 through the feed port 102, the driving motor 201 drives the rotating rod 202 to rotate, the rotating rod 202 drives the stirring paddle 203 and the incomplete spherical shell 301 to rotate, the stirring paddle 203 stirs the water body when rotating, so that the water body in the sub-bin 101 rotates, the incomplete spherical shell 301 drives the mounting block 303 to rotate, the mounting block 303 drives the four sets of connecting shafts 304 to rotate, the four sets of connecting shafts 304 drive the primary bevel gear 305 to rotate, the four sets of connecting shafts 304 rotate in the process of rotating, the secondary bevel gear 307 rotates, the four sets of primary bevel gears 305 respectively drive the four sets of grinding discs 306 to move synchronously, and the four sets of grinding discs 306 rotate while rotating;

[0054] S2, pour the silver powder from the feed port 102 into the distribution bin 101. After the silver powder enters the water, the large-particle silver powder is separated from the small-particle silver powder under the action of centrifugal force and gravity. The large-particle silver powder first enters the grinding bin 104 with the water flow. After entering the grinding bin 104, the water flow brings the silver powder into the four sets of guide grooves 301a. The incomplete spherical shell 301 rotates to grind the large-particle silver powder. The silver powder particle size gradually decreases. Under the action of water flow and gravity, the silver powder moves downward along the guide groove 301a. When the silver powder moves to the grinding disc 306, the grinding disc 306 grinds the silver powder. When the grinding disc 306 grinds the silver powder, the grinding direction keeps changing. The small-particle silver powder directly passes through the guide groove 301a with the water flow.

[0055] S3, after the silver powder is ground, it flows into the discharge bin 105 with the water flow and is finally discharged from the discharge port of the discharge bin 105, the water inlet pipe 110 is connected with the water supply pipe, and the water flows through the water inlet pipe 110 and the annular pipe 108 in turn and then sprays out from the six groups of nozzles 109 to flush the discharge bin 105;

[0056] S4, drying the silver powder output from the discharge port of the discharge bin 105 to complete the processing.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for producing silver powder with controllable particle size, characterized in that: include: The main body (100) comprises a material distribution bin (101), the side wall of the material distribution bin (101) is fixedly connected with a material feed port (102) and a water inlet (103), the bottom of the material distribution bin (101) is fixedly connected with a grinding bin (104), the bottom of the grinding bin (104) is fixedly connected with a material discharge bin (105), and the bottom of the material discharge bin (105) is provided with a material discharge port; The stirring mechanism (200) comprises a driving motor (201), the driving motor (201) being fixedly connected to the top center of the material distribution bin (101), the rotating shaft of the driving motor (201) passing through the material distribution bin (101) and being rotatably connected to the material distribution bin (101), a rotating rod (202) being arranged in the material distribution bin (101), the rotating rod (202) being fixedly connected to the bottom end of the rotating shaft of the driving motor (201), and the rotating rod (202) being fixedly connected to a stirring paddle (203); The grinding mechanism (300) comprises an incomplete spherical shell (301), wherein the incomplete spherical shell (301) is arranged inside the grinding chamber (104), the bottom end of the rotating rod (202) is fixedly connected to the incomplete spherical shell (301), the outer wall of the incomplete spherical shell (301) is in contact with the inner wall of the grinding chamber (104), four groups of guide grooves (301a) are arranged on the outer side of the incomplete spherical shell (301), the tops of the four groups of guide grooves (301a) are interconnected, and the bottom of the incomplete spherical shell (301) is fixedly connected to the inner wall of the grinding chamber (104). The incomplete spherical shell (301) is connected to a mounting cylinder (302), a mounting block (303) is arranged inside the incomplete spherical shell (301), the mounting block (303) is fixedly connected to the inner wall of the top of the incomplete spherical shell (301), the side wall of the mounting block (303) facing the four groups of guide grooves (301a) is fixedly connected to a connecting shaft (304), the outer sides of the four groups of connecting shafts (304) are rotatably sleeved with a primary bevel gear (305), the inner sides of the four groups of guide grooves (301a) facing each group of primary bevel gears (305) ) are provided with circular mounting openings at the positions thereof, and grinding discs (306) are rotatably arranged inside the four groups of mounting openings. The shape of the grinding discs (306) matches the mounting openings, and the distances between the outer sides of the grinding discs (306) and the inner walls of the grinding chamber (104) are always equal. The four groups of grinding discs (306) are respectively fixedly connected to the sides of the four groups of primary bevel gears (305) away from the mounting block (303), and a secondary bevel gear (307) is arranged below the mounting block (303). The four groups of grinding discs (306) are fixedly connected to the secondary bevel gears (307) and ... The bevel gear (307) is meshed, and a connecting column (308) is fixedly connected to the bottom of the secondary bevel gear (307), and the connecting column (308) passes through the mounting cylinder (302) and is rotatably connected to the mounting cylinder (302). A connecting block (309) is fixedly connected to the bottom of the connecting column (308), and three groups of fixed columns (310) are fixedly connected to the side wall of the connecting block (309), and the ends of the three groups of fixed columns (310) away from the connecting block (309) are fixedly connected to the inner wall of the discharge bin (105).

2. The device for producing silver powder with controllable particle size according to claim 1, characterized in that: The main body (100) further comprises an annular tube (108), a nozzle (109) and a water inlet pipe (110); the annular tube (108) is sleeved on the outside of the discharge bin (105); the nozzles (109) are provided in six groups; the six groups of nozzles (109) are all fixedly connected to the annular tube (108); the six groups of nozzles (109) all penetrate the discharge bin (105) and are fixedly connected to the discharge bin (105); and the water inlet pipe (110) is fixedly connected to the annular tube (108).

3. The device for producing silver powder with controllable particle size according to claim 2, characterized in that: The six groups of nozzles (109) are evenly distributed around the material bin (105), and the annular pipe (108), the nozzles (109) and the water inlet pipe (110) are all made of stainless steel.

4. The device for producing silver powder with controllable particle size according to claim 3, characterized in that: The main body (100) further comprises a fixing ring (106) and supporting columns (107), wherein the fixing ring (106) is fixedly sleeved on the outside of the material distribution bin (101), and the supporting columns (107) are provided in four groups, wherein the four groups of supporting columns (107) are all fixedly connected to the bottom of the fixing ring (106) and the four groups of supporting columns (107) are equidistantly distributed.

5. The device for producing silver powder with controllable particle size according to claim 4, characterized in that: The material distribution bin (101), the grinding bin (104), the material discharging bin (105), the rotating rod (202) and the axis of the rotating shaft of the driving motor (201) are arranged to coincide with each other; the axes of the incomplete spherical shell (301), the mounting cylinder (302), the secondary bevel gear (307), the connecting column (308) and the connecting block (309) are arranged to coincide with each other; and the four groups of grinding discs (306) are arranged to coincide with the axes of the corresponding connecting shafts (304) and the primary bevel gears (305), respectively.

6. The device for producing silver powder with controllable particle size according to claim 5, characterized in that: The stirring paddle (203) is located near the bottom of the material distribution bin (101), and the feed inlet (102) and the water inlet (103) are located near the top of the material distribution bin (101).

7. The device for producing silver powder with controllable particle size according to claim 6, characterized in that: The four groups of guide grooves (301a) and the four groups of grinding discs (306) are arranged at equal distances, and the groove walls of the guide grooves (301a), the outer walls of the grinding discs (306) and the inner wall of the grinding chamber (104) are all rough.

8. The device for producing silver powder with controllable particle size according to claim 7, characterized in that: The portion of the guide groove (301a) located above the grinding disc (306) has a groove depth that gradually decreases from top to bottom, and two sides of the grinding disc (306) overlap with the groove walls on both sides of the corresponding guide groove (301a).

9. The device for producing silver powder with controllable particle size according to claim 8, characterized in that: The outer dimension of the installation opening is smaller than the inner dimension thereof, and the bottom of the discharge bin (105) is bucket-shaped.

10. A method for producing silver powder with controllable particle size, using the production device according to claim 9, characterized in that: The following steps are involved: S1, water is injected into the material distribution bin (101) through the feed inlet (102), the driving motor (201) drives the rotating rod (202) to rotate, the rotating rod (202) drives the stirring paddle (203) and the incomplete spherical shell (301) to rotate, the stirring paddle (203) stirs the water body when rotating, so that the water body in the material distribution bin (101) rotates, the incomplete spherical shell (301) drives the mounting block (303) to rotate, the mounting block (303) drives the four groups of connecting shafts (304) to rotate, the four groups of connecting shafts (304) drive the primary bevel gear (305) to rotate, the four groups of connecting shafts (304) cooperate with the secondary bevel gear (307) to rotate during the rotation process, the four groups of primary bevel gears (305) respectively drive the four groups of grinding discs (306) to move synchronously, and the four groups of grinding discs (306) rotate while rotating; S2, pouring silver powder from the feed port (102) into the distribution bin (101), after the silver powder enters the water, under the action of centrifugal force and gravity, the large-particle silver powder is separated from the small-particle silver powder, and the large-particle silver powder first enters the grinding bin (104) with the water flow, and after entering the grinding bin (104), the water flow brings the silver powder into the four groups of guide grooves (301a), and the incomplete spherical shell (301) rotates to grind the large-particle silver powder, and the silver powder particle size gradually decreases. Under the action of water flow and gravity, the silver powder moves downward along the guide groove (301a), and when the silver powder moves to the grinding disc (306), the grinding disc (306) grinds the silver powder. When the grinding disc (306) grinds the silver powder, the grinding direction is constantly changed, and the small-particle silver powder directly passes through the guide groove (301a) with the water flow; S3, after the silver powder is ground, it flows into the discharge bin (105) along with the water flow and is finally discharged from the discharge port of the discharge bin (105), the water inlet pipe (110) is connected to the water supply pipe, and the water flows through the water inlet pipe (110) and the annular pipe (108) in sequence and then sprayed out from the six groups of nozzles (109) to flush the discharge bin (105); S4, drying the silver powder output from the discharge port of the discharge bin (105) to complete the processing.

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