A jet mill for silver powder production

Abstract

The present invention provides an air flow pulverizer for silver powder production, comprising a pulverizing cylinder with a conical inner wall at the lower end, supporting legs, a discharge pipe, a first control valve, a feed hopper, a second control valve, a top cover, an air flow pulverizing module, a plurality of vertical cylinders arranged on the top and bottom walls of a mounting frame, filter screens with different filter hole sizes respectively arranged at the bottoms of the plurality of mounting cylinders through the mounting cylinder, induced draft fans respectively corresponding to the plurality of vertical cylinders arranged on the top cover, and air outlet pipes respectively connected to the air outlet ends of the plurality of induced draft fans. The air flow pulverizer for silver powder production of the present invention can not only pulverize the silver powder quickly and efficiently, but also filter the pulverized silver powder through a plurality of filter screens with different filter hole sizes, and guide the pulverized silver powder out of the pulverizing device in a manner from small to large in particle size, thereby achieving pulverization and multi-stage screening of the silver powder without the aid of a classifier.

Description

Technical Field

[0001] The invention relates to the technical field of airflow pulverizing devices, and in particular to an airflow pulverizer for silver powder production. Background Art

[0002] Air flow mill is an important equipment for ultrafine powder processing.

[0003] The utility model with announcement number CN 211463428 U discloses an air flow pulverizer, which can conveniently separate the un-crushed part from the crushed part, reducing the impact on the silver powder crushing effect; it includes a crushing box, a box cover, a feeding pipe, a feeding hopper, an annular air inlet pipe, multiple groups of manifolds, multiple groups of nozzles, a partition, an induced draft fan, an air outlet pipe, a fixed plate, two groups of lifting plates, two groups of connecting rods, two groups of hammering blocks, two groups of limit springs, a first motor, a first reducer, a first transmission shaft and two groups of eccentric wheels, a switch valve is arranged on the feeding pipe, an air supply pipe is connected to the annular air inlet pipe, the left and right ends of the first transmission shaft respectively pass through the left and right walls of the crushing box, and a first mechanical seal is arranged at the contact between the first transmission shaft and the crushing box, the right end of the first transmission shaft is connected to the output end of the first reducer, the two groups of eccentric wheels are fixedly installed on the first transmission shaft, and the two groups of eccentric wheels are respectively in contact with the two groups of lifting plates. In the technical solution of this patent, since the partition is fixedly installed horizontally in the upper half of the crushing box, it can only filter silver materials of a single particle size. After the crushed silver powder is discharged from the crushing device, it still needs to be classified with the help of a classifier. The crushed silver powder cannot be directly classified according to the particle size and discharged from the crushing device, which is very troublesome and easily increases the cost of users to purchase a classifier. Summary of the invention

[0004] In view of this, the present invention aims at the deficiencies of the prior art and provides a jet mill for silver powder production, which can not only grind the silver powder quickly and efficiently, but also filter the crushed silver powder through a plurality of filter screens with different filter hole sizes, and guide the crushed silver powder out of the grinding device in the order of particle size from small to large, thereby achieving the grinding and multi-stage screening of the silver powder without the aid of a classifier.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an air flow pulverizer for silver powder production, characterized in that it includes a pulverizing cylinder with a conical inner wall at the lower end, a support leg arranged at the bottom of the pulverizing cylinder, a discharge pipe arranged at the bottom of the pulverizing cylinder, a first control valve arranged on the discharge pipe, a feed hopper arranged at the side end of the pulverizing cylinder, a second control valve arranged on the feed hopper, a top cover detachably arranged on the top of the pulverizing cylinder, an air flow pulverizing module arranged on the pulverizing cylinder, a plurality of vertical cylinders arranged on the top and bottom walls of the mounting frame, filter screens with different filter hole sizes arranged at the bottom of the plurality of mounting cylinders through the mounting cylinder, induced draft fans arranged on the top cover and corresponding to the plurality of vertical cylinders respectively, and air outlet pipes respectively connected to the air outlet ends of the plurality of induced draft fans. The air flow pulverizing module includes an air guide cavity arranged inside the side end of the pulverizing cylinder and located above the feed hopper, an air inlet pipe arranged on the outer side wall of the pulverizing cylinder and connected to the air guide cavity, an L-shaped shunt pipe arranged on the inner side wall of the pulverizing cylinder and connected to the air guide cavity, and an air nozzle arranged at the bottom of the shunt pipe.

[0006] Furthermore, the mounting cylinder is threadedly connected to the vertical cylinder, and a first screw rod is also provided at the side end of the mounting cylinder. The filter screen is fixedly connected to the bottom inner wall of the mounting cylinder. The mounting cylinder can be conveniently screwed and adjusted through the first screw rod, thereby conveniently realizing a flexible connection between the mounting cylinder and the vertical cylinder.

[0007] Furthermore, first telescopic push rods are vertically arranged on the left and right side ends of the top of the top cover, a cross bar is arranged between the bottoms of the output shafts of the two first telescopic push rods, and first knocking blocks respectively adapted to the multiple filter screens are arranged on the top of the cross bar. Through the synchronous vertical telescopic adjustment of the output shafts of the two first telescopic push rods, the cross bar and the multiple first knocking blocks can be synchronously moved vertically up and down, so that the multiple first knocking blocks intermittently contact the multiple filter screens, thereby knocking the filter screens to prevent the silver powder from clogging the filter holes of the filter screen, thereby improving the filtering effect of the filter screen.

[0008] Furthermore, a crushing auxiliary module is also provided on the inner wall of the crushing barrel, and the crushing auxiliary module includes a horizontal plate arranged on the inner wall of the crushing barrel and located above the air guide cavity, a stirring motor arranged at the bottom of the horizontal plate, a stirring shaft arranged at the lower end of the output shaft of the stirring motor and a stirring blade arranged on the stirring shaft. Through the cooperation of the horizontal plate, the stirring motor, the stirring shaft and the stirring blade, the silver powder in the crushing barrel can be stirred, so that the device can crush the silver powder more quickly and efficiently.

[0009] Furthermore, a scraper plate is provided on the stirring blade for scraping and cleaning the silver powder adhering to the inner wall of the pulverizing cylinder. The scraper plate can prevent the silver powder from adhering to the inner wall of the pulverizing cylinder and being unable to be pulverized, thereby avoiding the waste of silver powder. In addition, when the pulverizing is stopped and the excess incompletely crushed silver powder needs to be transferred out of the pulverizing cylinder, the scraper plate can scrape and clean it, so that the silver powder can leave the pulverizing cylinder more thoroughly, thereby avoiding the waste of silver powder.

[0010] Furthermore, the top cover is fixedly connected with the grinding barrel, and a fixing bolt for fixing the grinding barrel is provided on the top cover. The grinding barrel is also provided with a threaded fixing hole compatible with the fixing bolt. It is only necessary to fix the top cover with the grinding barrel by clipping, and then pass the fixing bolt through the top cover and connect it with the threaded fixing hole. In this way, flexible fixation of the top cover and the grinding barrel can be achieved.

[0011] Furthermore, an extension plate is provided at the bottom side end of the supporting leg, and anchor bolts for fixing to the ground are provided on the extension plate. During operation, the anchor bolts can pass through the extension plate and connect to the ground, thereby preventing the device from easily shifting and tipping over.

[0012] Furthermore, a sealing cap is threadedly connected to the top of the top cover, and a second screw rod is provided on the sealing cap. When the user pauses the crushing process, the sealing cap can be adjusted by screwing the second screw rod and the sealing cap can be removed, so that the situation inside the crushing barrel can be conveniently checked through the threaded connection hole on the top cover that is compatible with the sealing cap, without removing the top cover, and then the sealing cap can be connected to the top cover by the second screw rod.

[0013] Furthermore, a handle is provided on the top cover, and a sealing ring is provided on the outer wall of the crushing barrel, which is connected to the top cover display screen and located above the threaded fixing hole. The top cover can be easily moved by the handle, thereby conveniently realizing the connection and disassembly of the top cover and the crushing barrel; the sealing ring can enhance the sealing of the connection between the top cover and the crushing barrel.

[0014] Furthermore, a second telescopic push rod adapted to the feed hopper is provided on the outer wall of the crushing barrel, and a second knocking block adapted to the feed hopper is provided at the end of the output shaft of the second telescopic push rod. Through the telescopic adjustment of the second telescopic push rod, the second knocking block can be repeatedly and intermittently contacted with the feed hopper, thereby knocking the feed hopper to avoid silver powder adhering to the inner wall of the feed hopper and causing waste of silver powder.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: through the coordination of a crushing cylinder, supporting legs, a discharge pipe, a first control valve, a feed hopper, a top cover, a plurality of vertical cylinders, a plurality of filter screens, a plurality of induced draft fans, a plurality of air outlet pipes, an air guide cavity, a plurality of air inlet pipes, a plurality of diversion pipes and a plurality of air nozzles, not only can the silver powder be crushed quickly and efficiently, but the crushed silver powder can also be filtered through a plurality of filter screens with different filter hole sizes, and the crushed silver powder can be guided out of the crushing device in the order of small to large particle sizes, thereby realizing the crushing and multi-stage screening of the silver powder without the aid of a classifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0018] Figure 3 It is a front view structural schematic diagram of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the second knocking block of the present invention when colliding with the side end of the feed hopper;

[0020] Figure 5 It is a schematic structural diagram of the extension plate and the anchor bolts of the present invention.

[0021] In the figure: 101, crushing cylinder; 102, supporting leg; 103, discharge pipe; 104, first control valve; 105, feed hopper; 106, second control valve; 107, top cover; 108, vertical cylinder; 109, filter screen; 110, induced draft fan; 111, air outlet pipe; 112, first twist rod; 113, first telescopic push rod; 114, cross bar; 115, first knock block; 116, fixing bolt; 117, extension Extension plate; 118, anchor bolt; 119, installation tube; 201, air guide cavity; 202, air inlet pipe; 203, diverter pipe; 204, air nozzle; 301, horizontal plate; 302, stirring motor; 303, stirring shaft; 304, stirring blade; 305, scraper plate; 306, cover; 307, second screw rod; 308, handle; 309, sealing ring; 310, second telescopic push rod; 311, second knocking block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 , 2 As shown in Figures 3 and 4, an air flow pulverizer for silver powder production is characterized in that it includes a pulverizing cylinder 101 with a conical inner wall at the lower end, a supporting leg 102 arranged at the bottom of the pulverizing cylinder 101, a discharge pipe 103 arranged at the bottom of the pulverizing cylinder 101, a first control valve 104 arranged on the discharge pipe 103, a feed hopper 105 arranged at the side end of the pulverizing cylinder 101, a second control valve 106 arranged on the feed hopper 105, a top cover 107 detachably arranged on the top of the pulverizing cylinder 101, an air flow pulverizing module arranged on the pulverizing cylinder 101, a plurality of vertical cylinders 108 arranged on the top and bottom walls of the mounting frame, filter screens 109 with different filter hole sizes respectively arranged at the bottoms of the plurality of mounting cylinders 119 through mounting cylinders 119, induced draft fans 110 arranged on the top cover 107 and corresponding to the plurality of vertical cylinders 108 respectively, and air outlet pipes 111 respectively connected to the air outlet ends of the plurality of induced draft fans 110. The airflow pulverizing module includes an air guide chamber 201 disposed inside the side end of the pulverizing cylinder 101 and located above the feed hopper 105, an air inlet pipe 202 disposed on the outer wall of the pulverizing cylinder 101 and connected to the air guide chamber 201, an L-shaped shunt pipe 203 disposed on the inner wall of the pulverizing cylinder 101 and connected to the air guide chamber 201, and an air nozzle 204 disposed at the bottom of the shunt pipe. First telescopic push rods 113 are also vertically disposed at the left and right side ends of the top of the top cover 107, a cross bar 114 is also disposed between the bottoms of the output shafts of the two first telescopic push rods 113, and a first knocking block 115 respectively adapted to the plurality of filter screens 109 is also disposed at the top of the cross bar 114. A crushing auxiliary module is also provided on the inner side wall of the crushing cylinder 101, and the crushing auxiliary module includes a horizontal plate 301 provided on the inner side wall of the crushing cylinder 101 and located above the air guide cavity 201, a stirring motor 302 provided at the bottom of the horizontal plate 301, a stirring shaft 303 provided at the lower end of the output shaft of the stirring motor 302, and a stirring blade 304 provided on the stirring shaft 303. A second telescopic push rod 310 adapted to the feed hopper 105 is also provided on the outer side wall of the crushing cylinder 101, and a second knocking block 311 adapted to the feed hopper 105 is also provided at the end of the output shaft of the second telescopic push rod 310. A scraper plate 305 for scraping and cleaning the silver powder adhering to the inner side wall of the crushing cylinder 101 is also provided on the stirring blade 304.

[0024] The second control valve 106 can be opened first, and a certain amount of silver powder can be added to the feed hopper 105, and then added to the lower half of the grinding cylinder 101. At the same time, the second telescopic push rod 310 can be repeatedly extended and shortened by a certain length, so that the knocking block intermittently contacts the feed hopper 105, thereby knocking the feed hopper 105 to avoid the silver powder adhering to the inner wall of the feed hopper 105 and causing waste of silver powder. After that, the second control valve 106 can be closed; then, the compressed air after filtering and drying can be introduced into the annular air guide cavity 201 through the air inlet pipe 202, and divided into the annular air guide cavity 201 through the multiple diversion pipes 203. The silver powder is repeatedly collided, rubbed, sheared and crushed at the intersection of multiple high-pressure airflows; at the same time, the stirring motor 302 can be started to rotate the stirring shaft 303 and the stirring blade 304 to stir the silver powder in the crushing cylinder 101, so that the device can crush the silver powder more quickly and efficiently. At the same time, the scraper plate 305 will rotate with the stirring blade 304 to clean the silver powder adhering to the inner wall of the crushing cylinder 101, so as to avoid the silver powder adhering to the inner wall of the crushing cylinder 101 and being unable to be crushed, thereby avoiding the waste of silver powder.

[0025] In the process of filtering the crushed silver powder using the filter 109, the output shafts of the two first telescopic push rods 113 can be synchronously telescopically adjusted vertically, and the cross bar 114 and multiple first knocking blocks 115 can be synchronously moved vertically up and down, so that the multiple first knocking blocks 115 intermittently contact the multiple filter nets 109, thereby knocking the filter net 109 that is filtering the silver powder, preventing the silver powder from clogging the filter holes of the filter net 109, thereby improving the filtering effect of the filter net 109.

[0026] Afterwards, the induced draft fan 110 corresponding to the filter 109 with the smallest pores is started first, and it is ensured that the induced air volume of the induced draft fan 110 is greater than the high-pressure air volume entering the pulverizing cylinder 101, so that a negative pressure environment is formed inside the pulverizing cylinder 101, and the silver powder with the particle size that meets the requirements after being pulverized will pass through the filter pores of the corresponding filter 109 and be discharged under the suction of the induced draft fan 110, and flow to the collection device through the air outlet pipe 111 for collection; then the induced draft fan 110 corresponding to the filter 109 with the smallest pores can be closed, and the induced draft fan 110 corresponding to the filter 109 with the second smallest pores can be opened, so that the silver powder with the particle size that meets the requirements is discharged from the pulverizing cylinder 101 and introduced into the collection device through the corresponding air guide pipe; then, in the same way, the pulverized silver powder can be discharged from the pulverizing cylinder 101 in order from small to large particle sizes, and introduced into the collection device through the air outlet pipe 111; in this way, the classification and collection of the pulverized silver powder can be completed without the aid of a classifier.

[0027] After a period of time, when it is necessary to suspend the pulverization of the silver powder, it is only necessary to stop the high-pressure airflow into the pulverizing cylinder 101 through the air inlet pipe 202 and stop the stirring motor 302; if it is necessary to transfer the remaining silver powder out of the pulverizing cylinder 101, it is only necessary to open the first control valve 104 and start the stirring motor 302, so that the stirring shaft 303 and the stirring blade 304 stir the remaining silver powder in the pulverizing cylinder 101, so that the pulverized silver powder can smoothly and quickly leave the pulverizing cylinder 101 through the discharge pipe 103, and at the same time, the scraper plate 305 will also rotate with the stirring blade 304, so that the silver powder adhering to the pulverizing cylinder 101 can be more thoroughly left, thereby avoiding waste of silver powder.

[0028] According to another embodiment of the present invention, Figure 1 As shown, the installation cylinder 119 is threadedly connected with the vertical cylinder 108, and the side end of the installation cylinder 119 is also provided with a first screw rod 112, and the filter screen 109 is fixedly connected with the bottom inner wall of the installation cylinder 119. Through the first screw rod 112, the installation cylinder 119 can be easily screwed and adjusted, so as to conveniently realize the flexible connection between the installation cylinder 119 and the vertical cylinder 108. After a period of time, when the filter screen 109 that is damaged or has an inappropriate filter hole size needs to be replaced, the top cover 107 can be opened first, and then the installation cylinder 119 can be screwed and adjusted through the first screw rod 112, and the installation cylinder 119 can be removed, and the filter screen 109 can be replaced together with the installation cylinder 119, and the new installation cylinder 119 can be screwed and adjusted through the first screw rod 112, so that the installation cylinder 119 and the vertical cylinder 108 are reconnected together, and then the silver powder can be filtered and processed.

[0029] According to another embodiment of the present invention, Figure 1 , 3 As shown, the top cover 107 is fixedly engaged with the grinding cylinder 101, and a fixing bolt 116 for fixing the grinding cylinder 101 is also provided on the top cover 107. The grinding cylinder 101 is also provided with a threaded fixing hole compatible with the fixing bolt 116. It is only necessary to make the top cover 107 and the grinding cylinder 101 be fixedly engaged, and then make the fixing bolt 116 pass through the top cover 107 and connect with the threaded fixing hole, so that the top cover 107 and the grinding cylinder 101 can be flexibly fixed.

[0030] According to another embodiment of the present invention, Figure 5 As shown, an extension plate 117 is also provided at the bottom side end of the support leg 102, and an anchor bolt 118 for fixing to the ground is also provided on the extension plate 117. During operation, the anchor bolt 118 can pass through the extension plate 117 and connect to the ground, thereby preventing the device from easily deflecting and tipping over.

[0031] According to another embodiment of the present invention, Figure 2 As shown, a sealing cover 306 is also threadedly connected to the top of the top cover 107, and a second screw rod 307 is also provided on the sealing cover 306. When the user pauses the crushing process, the sealing cover 306 can be screwed and adjusted by the second screw rod 307, and the sealing cover 306 can be removed, so that the situation inside the crushing barrel 101 can be conveniently checked through the threaded connection hole on the top cover 107 that is compatible with the sealing cover 306, without removing the top cover 107, and then the sealing cover 306 can be connected to the top cover 107 together by the second screw rod 307.

[0032] According to another embodiment of the present invention, Figure 1 , 3 As shown, a handle 308 is also provided on the top cover 107, and a sealing ring 309 is also provided on the outer wall of the pulverizing barrel 101, which is connected to the display screen of the top cover 107 and is located above the threaded fixing hole. The top cover 107 can be easily moved through the handle 308, so as to facilitate the connection and disassembly of the top cover 107 and the pulverizing barrel 101; the sealing ring 309 can enhance the sealing of the connection between the top cover 107 and the pulverizing barrel 101.

[0033] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A jet mill for silver powder production, characterized in that: The invention comprises a grinding cylinder (101) whose inner side wall at the lower end is conical, a support leg (102) arranged at the bottom of the grinding cylinder (101), a discharge pipe (103) arranged at the bottom of the grinding cylinder (101), a first control valve (104) arranged on the discharge pipe (103), a feed hopper (105) arranged at the side end of the grinding cylinder (101), a second control valve (106) arranged on the feed hopper (105), a top cover (107) detachably arranged on the top of the grinding cylinder (101), an airflow grinding module arranged on the grinding cylinder (101), a plurality of vertical cylinders (108) arranged on the top and bottom walls of a mounting frame, filter screens (109) with different filter hole sizes respectively arranged at the bottom of the plurality of mounting cylinders (119) through mounting cylinders (119), induced draft fans (110) arranged on the top cover (107) and corresponding to the plurality of vertical cylinders (108), and air outlet pipes (111) respectively connected to the air outlet ends of the plurality of induced draft fans (110); First telescopic push rods (113) are also vertically arranged at the left and right side ends of the top of the top cover (107), a cross bar (114) is also arranged between the bottoms of the output shafts of the two first telescopic push rods (113), and first knocking blocks (115) respectively adapted to the multiple filter screens (109) are also arranged at the top of the cross bar (114).

2. The air flow mill for silver powder production according to claim 1, characterized in that: The installation cylinder (119) is threadedly connected to the vertical cylinder (108); a first screw rod (112) is also provided at the side end of the installation cylinder (119); and the filter screen (109) is fixedly connected to the inner side wall of the bottom of the installation cylinder (119).

3. The air flow mill for silver powder production according to claim 2, characterized in that: The air flow pulverizing module comprises an air guide chamber (201) arranged inside the side end of the pulverizing cylinder (101) and located above the feed hopper (105), an air inlet pipe (202) arranged on the outer side wall of the pulverizing cylinder (101) and connected to the air guide chamber (201), an L-shaped flow divider pipe (203) arranged on the inner side wall of the pulverizing cylinder (101) and connected to the air guide chamber (201), and an air nozzle (204) arranged at the bottom of the flow divider pipe.

4. The air flow mill for silver powder production according to claim 3, characterized in that: A pulverizing auxiliary module is also provided on the inner side wall of the pulverizing cylinder (101).

5. The air flow mill for silver powder production according to claim 4, characterized in that: The pulverizing auxiliary module comprises a horizontal plate (301) arranged on the inner wall of the pulverizing cylinder (101) and located above the air guide cavity (201), a stirring motor (302) arranged at the bottom of the horizontal plate (301), a stirring shaft (303) arranged at the lower end of the output shaft of the stirring motor (302), and a stirring blade (304) arranged on the stirring shaft (303).

6. The air flow mill for silver powder production according to claim 5, characterized in that: The stirring blade (304) is also provided with a scraper plate (305) for scraping and cleaning the silver powder adhering to the inner wall of the pulverizing cylinder (101).

7. The air flow mill for silver powder production according to any one of claims 1 to 6, characterized in that: The top cover (107) is fixedly connected to the pulverizing cylinder (101), and a fixing bolt (116) for fixing the pulverizing cylinder (101) is also provided on the top cover (107), and a threaded fixing hole matched with the fixing bolt (116) is also provided on the pulverizing cylinder (101).

8. The air flow mill for silver powder production according to any one of claims 1 to 6, characterized in that: An extension plate (117) is also provided at the bottom side end of the support leg (102), and an anchor bolt (118) for fixing to the ground is also provided on the extension plate (117).

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