Multistage screening device for zinc particle preparation

Abstract

This invention discloses a multi-stage screening device for zinc particle preparation, relating to the field of zinc particle preparation technology. It includes a workbench with a screening cylinder. A conical material plate is positioned near the top opening of the screening cylinder. A cylinder cover for sealing the opening is provided on the screening cylinder, and a feed inlet is located on the cover. The conical material plate and the cover form a crushing chamber, which contains a crushing mechanism for pulverizing large-diameter zinc particles. A hopper for storing large-diameter zinc particles is located on the feed inlet. The bottom of the hopper is connected to the feed inlet via a conveying assembly to intermittently and in equal quantities transport large-diameter zinc particles into the crushing chamber. A vacuum tube is connected to one side of the cover, and an inert gas conveying pipe is connected to the other side. This invention, through intermittent and equal-quantity conveying by the conveying assembly, avoids blockage caused by excessive material transport at one time, and also facilitates subsequent crushing and screening.

Description

Technical Field

[0001] This invention relates to the field of zinc particle preparation technology, and in particular to a multi-stage sieving device for zinc particle preparation. Background Technology

[0002] Zinc particles are an indispensable key raw material in battery manufacturing, alloy production, and anti-corrosion coatings. Different applications have strict and varied requirements for the particle size distribution of zinc particles. For example, zinc-air batteries require ultrafine, highly active zinc powder, while certain alloy additives require zinc particles with a specific median diameter. Therefore, particle size classification is a crucial step in the preparation process of zinc particles.

[0003] Currently, the typical industrial process for preparing small-particle zinc powder is as follows: First, initial zinc particles are obtained through melt atomization or electrolysis. Then, depending on the requirements of the target product, the larger initial particles often need to be mechanically crushed or sheared to obtain finer powder. The crushed material is a mixture with a wide particle size distribution, which must be separated into narrow-particle products that meet different specifications through sieving (or grading) operations, thereby achieving high-value utilization of resources.

[0004] However, this traditional process suffers from a long-standing, unresolved technical flaw: the oxidation protection of zinc particles breaks down between the two critical processes of crushing and screening, leading to the inevitable oxidation of highly reactive fine zinc particles. Specifically:

[0005] Large zinc particles (such as zinc ingots and coarse granules) are relatively stable in dry air at room temperature because a dense protective film of basic zinc carbonate can form on their surface. However, when crushed into smaller particles, the total surface area (specific surface area) per unit mass of material increases. This means that the reaction interface available for oxidation grows exponentially, and the newly formed surface has extremely high surface energy, making it highly reactive. If the crushing environment is air, the newly formed zinc surface will react instantly with oxygen, leading to particle oxidation. Oxidation not only reduces the chemical activity of zinc (affecting subsequent performance), but the exothermic reaction may also cause a temperature increase, accelerating internal oxidation.

[0006] To address the oxidation problem during screening, existing technologies typically employ a method of installing a sealed enclosure around the vibrating screen and filling the enclosure with an inert gas (such as nitrogen). This method provides some protection for the screening process. However, it has significant drawbacks: the material is usually exposed to air during the conveying and feeding process from the crusher to the screening machine, and the newly formed oxide layer generated during the crushing stage is irreversible and will further oxidize. Summary of the Invention

[0007] This invention provides a multi-stage sieving device for zinc particle preparation, which can solve the following problems existing in the prior art:

[0008] 1) Exposure risks in the crushing process; 2) Protection limitations in the screening process.

[0009] A multi-stage screening device for preparing zinc granules includes a workbench, a screening cylinder on the workbench, a conical material plate inside the screening cylinder near the top opening, a cylinder cover for sealing the cylinder opening, and a feed inlet on the cylinder cover.

[0010] The conical material plate and the cylinder cover enclose a crushing chamber, which is equipped with a crushing mechanism for crushing large-diameter zinc particles. A hopper for storing large-diameter zinc particles is provided on the feed inlet. The bottom of the hopper is connected to the feed inlet through a conveying assembly to intermittently and in equal amounts convey large-diameter zinc particles into the crushing chamber.

[0011] The cylinder cover has a vacuum tube connected to one side and an inert gas delivery tube connected to the other side.

[0012] The screening cylinder is also equipped with a screening module to perform multi-stage screening of the crushed small-diameter zinc particles.

[0013] Preferably, the material conveying assembly includes a material conveying square tube fixed to the bottom of the hopper, a material conveying cylinder between the material conveying square tubes, and a receiving cylinder that is slidably inserted into the material conveying square tube fixed on the inlet.

[0014] The conveying cylinder is equipped with a conveying roller that rotates inside. The roller wall of the conveying roller slides against the inner wall of the conveying cylinder. The roller wall of the conveying roller is provided with a conveying groove for transferring zinc particles. The conveying roller is fixed to the output end of the conveying motor that is fixed to the outside of the conveying cylinder.

[0015] Preferably, the conical material plate has a material discharge port at its center end;

[0016] The crushing chamber is also equipped with a sealing mechanism to adjust the opening or closing of the material discharge port.

[0017] Preferably, the sealing mechanism includes a sealing rod embedded in the material discharge port, the outer diameter of the sealing rod being smaller than the inner diameter of the material discharge port, and the sealing rod being connected to a lifting mechanism that drives its lifting and lowering.

[0018] The bottom of the sealing rod is fixedly equipped with a plug whose outer diameter is larger than the inner diameter of the material discharge port.

[0019] Preferably, the end of the sealing rod away from the plug is fixedly connected to the support cylinder, the center end of the cylinder cover is rotatably provided with a limiting cylinder, the support cylinder is slidably provided with a limiting disc, the axial end of the limiting disc is fixedly provided with a limiting shaft, and the two ends of the limiting shaft are respectively fixedly provided with a first spring.

[0020] Preferably, the lifting mechanism includes a lifting rod fixed to the limiting cylinder, the other end of the lifting rod being rotatably connected to an L-shaped bracket, a rack being fixedly arranged at the end of the L-shaped bracket, and a first gear being rotatably arranged on the outside of the conveying cylinder and fixedly connected to the conveying roller, with the rack meshing with the first gear.

[0021] Preferably, the sealing rod has several sets of keyways arranged in a circumferential array, the crushing mechanism includes a blade ring slidably sleeved on the sealing rod, several sets of key seats corresponding to and slidably engaging with the keyways are fixedly arranged on the blade ring, several sets of crushing blades are fixedly arranged in a circumferential array on the outer edge of the blade ring, the sealing rod is also provided with a third spring, and several sets of positioning holes are arranged in a circumferential array on the wall of the support cylinder, and a positioning rod fixedly connected to the limiting cylinder is slidably inserted into the positioning hole;

[0022] The lifting rod is fixedly equipped with a second gear, and a crushing motor is fixedly equipped on one side of the L-shaped bracket. The output end of the crushing motor is fixedly equipped with a third gear that meshes with the second gear.

[0023] Preferably, the screening module includes a screening plate fixedly arranged inside the screening cylinder, the screening plate and the conical material plate forming a first screening cavity, and a first storage cylinder connected to one side of the first screening cavity;

[0024] The bottom of the screening cylinder is also provided with a receiving plate with its center end protruding towards the screening plate. The receiving plate and the screening plate enclose a second screening cavity, and a second storage cylinder is connected to one side of the second screening cavity.

[0025] Preferably, both the first and second storage cylinders have discharge ports at their bottoms. A first sealing plate for closing the discharge port is slidably provided at the bottom of the storage cylinder. A first support is also fixedly provided on one side of the bottom of the storage cylinder. A first guide rod that is slidably inserted into the first support is fixedly provided on the first sealing plate. A fourth spring is provided on the first guide rod.

[0026] Preferably, the workbench is also provided with a collection cylinder, a material collection pipe is fixedly arranged on the collection cylinder, a second sealing plate for sealing the opening of the material collection pipe is slidably arranged on the collection cylinder, a second support is fixedly arranged on one side of the collection cylinder, a second guide rod is fixedly arranged on the second sealing plate and slidably inserted into the second support, and a fifth spring is provided on the second guide rod.

[0027] The first sealing plate has a first arc-shaped groove for closing and fitting with the collecting pipe, and the second sealing plate has a second arc-shaped groove for fitting with the wall of the storage cylinder.

[0028] This invention provides a multi-stage sieving device for zinc particle preparation, which has the following beneficial effects:

[0029] 1) In this invention, large-diameter zinc particles to be processed are temporarily stored in a hopper. During the preparation process, the hopper can be connected to the feed inlet through a conveying component to facilitate the transport of large-diameter zinc particles in the hopper to the crushing chamber. After one transport is completed, the hopper can be disconnected from the feed inlet through the conveying component to prevent outside air from entering the crushing chamber during the crushing of large-diameter zinc particles. Accordingly, this invention uses an intermittent equal-volume conveying method through the conveying component to avoid the phenomenon of blockage caused by excessive material transport at one time. At the same time, it is beneficial to subsequent crushing and screening.

[0030] 2) After the feeding assembly of this invention inputs the large-diameter zinc particles from the hopper into the crushing chamber, it can use a vacuum device and a vacuum tube to evacuate the crushing chamber. Then, it uses an inert gas conveying device and an inert gas conveying pipe to deliver inert gas into the crushing chamber. During the crushing process, the inert gas can protect the small-diameter zinc particles from oxidation by the air. Correspondingly, before the feeding assembly delivers the next set of large-diameter zinc particles into the crushing chamber, the inert gas conveying device can extract the inert gas from the crushing chamber, thereby achieving the effect of recycling the inert gas and avoiding waste. This process can ensure that the crushed small-diameter zinc particles do not come into direct contact with the air and can also recycle the inert gas, reducing production costs.

[0031] 3) The present invention uses the first gear and rack to cooperate, so that while feeding material through the feeding roller, the plug can be adjusted to open or close the discharge port synchronously. The present invention does not require other servo drive equipment to adjust the height of the plug, which not only reduces the cost, but also reduces the control process, and further improves the synchronization and stability. Attached Figure Description

[0032] Figure 1 A three-dimensional structural diagram of a multi-stage sieving device for zinc particle preparation provided by the present invention. Figure 1 ;

[0033] Figure 2 This is a three-dimensional structural diagram of a multi-stage sieving device for preparing zinc particles provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the main structure of a multi-stage sieving device for preparing zinc particles provided by the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the sieving cylinder in a multi-stage sieving device for preparing zinc particles provided by the present invention;

[0036] Figure 5This is a schematic diagram of the internal structure of the screening cylinder in a multi-stage screening device for zinc particle preparation provided by the present invention;

[0037] Figure 6 This is a cross-sectional view of the screening cylinder in a multi-stage screening device for zinc particle preparation provided by the present invention.

[0038] Figure 7 This is a schematic diagram of the zinc particle crushing and sieving process in a multi-stage sieving device for zinc particle preparation provided by the present invention.

[0039] Figure 8 Provided by the present invention Figure 6 A partially enlarged structural diagram at point A in the middle;

[0040] Figure 9 This is a schematic diagram of the positioning rod in a multi-stage sieving device for preparing zinc particles provided by the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Workbench; 2. Cylinder cover; 3. Positioning cylinder; 4. Collection cylinder; 5. Hopper; 6. Screening cylinder; 7. Crushing motor; 8. Conical material plate; 9. Limiting cylinder; 101. Rotary disk; 102. Rotary motor; 201. First storage cylinder; 202. Second storage cylinder; 203. Vacuum tube; 204. Inert gas conveying pipe; 205. Third gear; 206. Second gear; 207. Lifting rod; 208. First sealing plate; 209. First guide rod; 210. Fourth spring; 211. First support; 212. Annular cylinder; 301. Return spring; 401. Collection pipe; 402. Second sealing plate; 403. Second arc groove; 404. Second support; 405. Second guide rod; 406. Fifth spring; 407. Discharge port; 408. First arc groove; 501. Conveying... 502. Material conveying cylinder; 503. Material conveying motor; 504. First gear; 505. Rack; 506. L-shaped bracket; 507. Lifting plate; 508. Support shaft; 509. Second spring; 510. Receiving cylinder; 511. Material conveying roller; 512. Material conveying trough; 601. Feed inlet; 701. Telescopic sleeve; 801. Crushing chamber; 802. Screening plate; 803. 804. Screening chamber; 805. Receiving plate; 806. Second screening chamber; 807. Vibrating motor; 808. Material discharge port; 909. Support cylinder; 900. Limiting shaft; 901. Limiting disc; 902. First spring; 903. Sealing rod; 904. Plug; 905. Keyway; 906. Knife ring; 907. Crushing knife; 918. Third spring; 919. Positioning hole; 910. Positioning rod. Detailed Implementation

[0043] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0044] Example 1

[0045] like Figures 1 to 3 As shown in the figure, a multi-stage screening device for zinc particle preparation provided in this embodiment of the invention includes a workbench 1, a screening cylinder 6 on the workbench 1, a conical material plate 8 inside the screening cylinder 6 near the top opening, a cylinder cover 2 for sealing the cylinder opening, and a feed inlet 601 on the cylinder cover 2; specifically, in this embodiment, when preparing small-diameter zinc particles, large-diameter zinc particles can be added into the screening cylinder 6 through the feed inlet 601 to facilitate subsequent processing;

[0046] In this embodiment, the conical material plate 8 and the cylinder cover 2 enclose a crushing chamber 801. The crushing chamber 801 is equipped with a crushing mechanism for crushing large-diameter zinc particles to prepare small-diameter zinc particles.

[0047] To automatically add large-diameter zinc particles into the crushing chamber 801 through the feed inlet 601, a hopper 5 for storing large-diameter zinc particles is provided on the feed inlet 601. The bottom of the hopper 5 is connected to the feed inlet 601 through a conveying assembly to intermittently and in equal quantities convey the large-diameter zinc particles into the crushing chamber 801. It can be noted that in this embodiment, some of the large-diameter zinc particles to be processed are temporarily stored in the hopper 5. During the preparation process, the hopper 5 can be connected to the feed inlet 601 through the conveying assembly to facilitate the conveying of the large-diameter zinc particles in the hopper 5 into the crushing chamber 801. After one conveying is completed, the hopper 5 can be disconnected from the feed inlet 601 through the conveying assembly to prevent outside air from entering the crushing chamber 801 during the crushing of large-diameter zinc particles. Accordingly, this embodiment avoids the phenomenon of blockage caused by excessive material conveying at one time by using the intermittent and equal-quantity conveying method of the conveying assembly, and at the same time, it is beneficial to subsequent crushing and screening.

[0048] In one embodiment, a vacuum tube 203 is connected to one side of the cylinder cover 2, and an inert gas conveying pipe 204 is connected to the other side. Specifically, the other end of the vacuum tube 203 is connected to a vacuum device, and the other end of the inert gas conveying pipe 204 is connected to an inert gas conveying device. In this embodiment, after the feeding assembly inputs large-diameter zinc particles from the hopper 5 into the crushing chamber 801, the crushing chamber 801 can be evacuated using the vacuum device in conjunction with the vacuum tube 203. Then, the inert gas is conveyed to the crushing chamber via the inert gas conveying device in conjunction with the inert gas conveying pipe 204. Inside chamber 801, during the process of the crushing mechanism breaking large-diameter zinc particles into small-diameter zinc particles, inert gas can protect the small-diameter zinc particles and prevent them from being oxidized by air. Correspondingly, before the conveying component transports the next set of large-diameter zinc particles to the crushing chamber 801, the inert gas conveying device can extract the inert gas in the crushing chamber 801, thereby achieving the effect of recycling the inert gas and avoiding waste of inert gas. This process can ensure that the crushed small-diameter zinc particles do not come into direct contact with air and can also recycle the inert gas, reducing production costs.

[0049] Furthermore, the vacuum equipment and inert gas conveying equipment in this embodiment both adopt existing technologies. This embodiment does not limit their specific models and principles, as long as they meet the actual application requirements.

[0050] It should also be noted that the inert gas in this embodiment can be nitrogen.

[0051] In this embodiment, the screening cylinder 6 is equipped with a screening module to perform multi-stage screening of the crushed small-diameter zinc particles; specifically, after the large-diameter zinc particles are crushed, they can be directly screened in the screening cylinder 6 under the protection of inert gas without secondary transfer, so as to avoid oxidation caused by contact between the small-diameter zinc particles and the air.

[0052] Example 2

[0053] Based on Example 1, please refer to Figures 3-7The material conveying assembly includes a conveying square cylinder 501 fixed to the bottom of the hopper 5, a conveying cylinder 502 disposed between the conveying square cylinders 501, and a receiving cylinder 510 fixedly disposed on the inlet 601, which slidably inserts into the conveying square cylinder 501. A conveying roller 511 is rotatably disposed inside the conveying cylinder 502, the roller wall of the conveying roller 511 slidingly fitting against the inner wall of the conveying cylinder 502. A conveying groove 512 for transferring zinc particles is formed on the roller wall of the conveying roller 511. The conveying roller 511 is fixed to the output end of a conveying motor 503 fixed to the outside of the conveying cylinder 502. It can be noted that... In the initial state, the feeding trough 512 is oriented towards the hopper 5. When the large-diameter zinc particles to be prepared are added into the hopper 5, the zinc particles can fall into the feeding trough 512. When it is necessary to convey zinc particles into the crushing chamber 801, the feeding motor 503 can be started to drive the feeding roller 511 to rotate. The feeding roller 511 drives the zinc particles in the feeding trough 512 to rotate synchronously until the feeding trough 512 rotates to the side facing the receiving cylinder 510, so that the zinc particles in the feeding trough 512 can fall into the crushing chamber 801 along the receiving cylinder 510 and the feed inlet 601 under the action of gravity.

[0054] In order to screen the small-diameter zinc particles after crushing, in this embodiment, please refer to... Figures 5-8 The conical material plate 8 has a discharge port 807 at its center end. The crushing chamber 801 is also equipped with a sealing mechanism to adjust the opening or closing of the discharge port 807. It can be explained that before large-diameter zinc particles are conveyed to the crushing chamber 801, the discharge port 807 is sealed by the sealing mechanism to prevent large-diameter zinc particles that have not been crushed from falling directly along the discharge port 807. Correspondingly, after crushing is completed, the discharge port 807 can be opened by adjusting the sealing mechanism so that the crushed small-diameter zinc particles fall along the discharge port 807, which is convenient for subsequent screening.

[0055] As one embodiment of this invention, the sealing mechanism includes a sealing rod 905 embedded in the discharge port 807. The outer diameter of the sealing rod 905 is smaller than the inner diameter of the discharge port 807. The sealing rod 905 is connected to a lifting mechanism that drives its lifting and lowering. A plug 906 with an outer diameter larger than the inner diameter of the discharge port 807 is fixedly arranged at the bottom of the sealing rod 905. It can be explained that when it is necessary to adjust the discharge port 807 to be closed, the sealing rod 905 can be driven to rise through the lifting mechanism so that the plug 906 is tightly fitted with the conical material plate 8 on the side edge of the discharge port 807, so that the zinc particles in the crushing chamber 801 cannot pass through the discharge port 807 to be discharged. When it is necessary to discharge the crushed small zinc particles along the discharge port 807, the sealing rod 905 can be driven to fall through the lifting mechanism so that the plug 906 is separated from the discharge port 807, and the zinc particles in the crushing chamber 801 can fall along the gap between the sealing rod 905 and the discharge port 807.

[0056] Specifically, in this embodiment, the end of the sealing rod 905 furthest from the plug 906 is fixedly connected to the support cylinder 901. A limiting cylinder 9 is rotatably arranged at the center end of the cylinder cover 2. A limiting disc 903 is slidably arranged inside the support cylinder 901. A limiting shaft 902 is fixedly arranged at the axial end of the limiting disc 903. First springs 904 are fixedly arranged at both ends of the limiting shaft 902. One set of first springs 904 furthest from the limiting disc 903 is fixed to the bottom of the support cylinder 901. The other set of first springs 904... One end away from the limiting plate 903 is fixed to the bottom of the limiting cylinder 9; wherein, the driving end of the lifting mechanism is connected to the cylinder cover 2; it can be explained that, in this embodiment, when adjusting the lifting and lowering of the sealing rod 905 within the discharge port 807, the cylinder cover 2 is first driven to rise and fall by the lifting mechanism. During the rising and lowering of the cylinder cover 2, the sealing rod 905 can be driven to rise and fall by the limiting cylinder 9, the limiting shaft 902 and the first spring 904, thereby achieving the effect of adjusting the opening or closing of the discharge port 807 through the plug 906.

[0057] Furthermore, when the lifting mechanism drives the cylinder cover 2 to rise and fall, in order to ensure the sealing effect of the cylinder cover 2 on the opening of the screening cylinder 6, an annular cylinder 212 is fixedly arranged on the outer edge of the cylinder cover 2, and the inner wall of the annular cylinder 212 slides and fits against the outer wall of the screening cylinder 6. It can be explained that when the lifting mechanism drives the cylinder cover 2 to rise, the cylinder wall of the annular cylinder 212 and the cylinder wall of the screening cylinder 6 can always maintain a state of mutual contact, so as to avoid the gas in the crushing chamber 801 from intermittently leaking along the cylinder cover 2 and the screening cylinder 6, and the sealing performance is better.

[0058] Please refer to Figures 2-6 The lifting mechanism of this embodiment includes a lifting rod 207 fixed on the limiting cylinder 9. The other end of the lifting rod 207 is rotatably connected to the L-shaped bracket 506. A rack 505 is fixedly arranged on the end of the L-shaped bracket 506. A first gear 504 fixedly connected to the feeding roller 511 is rotatably arranged on the outside of the feeding cylinder 502. The rack 505 meshes with the first gear 504. It can be explained that when the feeding trough 512 is located on the side closer to the hopper 5, the plug 906 and the discharge port 807 are in the open state. As the feeding motor 503 drives the feeding roller 511 to rotate, the feeding roller 511 can synchronously drive the first gear 504 to rotate. During the rotation, the first gear 504 can mesh synchronously with the first gear 504, thereby driving the cylinder cover 2 to rise through the L-shaped bracket 506 and the limiting cylinder 9. Correspondingly, when the feeding motor 503 rotates in the opposite direction, it can drive the cylinder cover 2 to fall synchronously.

[0059] It should be noted that in this embodiment, before the material conveying trough 512 rotates to be in contact with the receiving cylinder 510, the plug 906 rises to be in contact with the discharge port 807 to avoid leakage of inert gas in the screening cylinder 6 and to improve the sealing performance.

[0060] It should also be noted that in this embodiment, the first gear 504 and the rack 505 cooperate to achieve the effect of synchronously adjusting the opening or closing of the discharge port 807 by adjusting the plug 906 while feeding material through the feed roller 511. This embodiment does not require setting up other servo drive devices to adjust the height of the plug 906, which not only reduces costs but also reduces the control process, and further improves synchronization and stability.

[0061] In addition, during the rising process of the cylinder cover 2 in this embodiment, the receiving cylinder 510 can be driven to slide in the conveying cylinder 501 simultaneously, ensuring that the receiving cylinder 510 and the conveying cylinder 501 are always in a connected state.

[0062] To ensure the stability of the rack 505's lifting and lowering, please refer to... Figures 1-2 The L-shaped bracket 506 is connected to one side of the hopper 5 via the telescopic sleeve 701. Specifically, during the lifting and lowering process, the rack 505 can synchronously drive the telescopic sleeve 701 to extend and retract to ensure the stability of the L-shaped bracket 506's movement.

[0063] In this embodiment, a support shaft 508 is also fixedly arranged on the wall of the screening cylinder 6, and the other end of the support shaft 508 is fixedly connected to the bottom of the hopper 5 to achieve the effect of supporting and limiting the hopper 5.

[0064] To ensure that the cylinder cover 2 can be raised and lowered stably, please refer to [the relevant documentation / reference]. Figures 3-6 A lifting plate 507 is slidably sleeved on the support shaft 508, and the lifting plate 507 is fixedly connected to the annular cylinder 212. The support shaft 508 is also provided with a second spring 509, one end of which is fixed to the lifting plate 507 and the other end is fixed to the top of the support shaft 508. Specifically, during the lifting and lowering of the cylinder cover 2, the lifting plate 507 can be driven to slide on the support shaft 508 simultaneously. The lifting plate 507 can compress or stretch the second spring 509 and generate elastic force to ensure the stability of the movement of the cylinder cover 2.

[0065] As one implementation method of this embodiment, please refer to Figures 2-4 as well as Figures 6-9The sealing rod 905 has several sets of keyways 907 arranged in a circumferential array. The crushing mechanism includes a blade ring 908 slidably sleeved on the sealing rod 905. Several sets of key seats are fixedly arranged on the blade ring 908, corresponding to and slidingly engaging with the keyways 907. Several sets of crushing blades 909 are fixedly arranged in a circumferential array on the outer edge of the blade ring 908. The sealing rod 905 is also provided with a third spring 910. One end of the third spring 910 is fixed to the bottom of the support cylinder 901, and the other end is fixed to the blade ring 908. The support cylinder 901 has several sets of positioning holes 911 arranged in a circumferential array on its cylinder wall. Positioning rods 912, which are fixedly connected to the limiting cylinder 9, are slidably inserted into the positioning holes 911. A second gear 206 is fixedly arranged on the lifting rod 207. A crushing motor 7 is fixedly arranged on one side of the L-shaped bracket 506. A third gear 205, meshing with the second gear 206, is fixedly arranged at the output end of the crushing motor 7. It can be noted that in this embodiment, when the plug 906 and the discharge port 80... When the 7 are in a separated state, the third spring 910 is in a compressed state, which can give the blade ring 908 a force towards the discharge port 807. Based on the limiting effect of the crushing blade 909, the blade ring 908 is prevented from being embedded in the discharge port 807. When the lifting mechanism adjusting plug 906 rises and closes the discharge port 807, the blade ring 908 can always be pushed to the same axial height under the elastic force of the third spring 910. Therefore, after the large-diameter zinc particles are transported to the crushing chamber 801, the crushing motor 7 is started to drive the third gear 205 to rotate. During the rotation of the third gear 205, it can drive the limiting cylinder 9 to rotate by meshing with the second gear 206. The limiting cylinder 9 can drive the support cylinder 901 to rotate by the positioning rod 912 and the positioning hole 911. The support cylinder 901 drives the blade ring 908 and the crushing blade 909 to rotate by the sealing rod 905 and the keyway 907 and the key seat, thereby achieving the effect of crushing the large-diameter zinc particles in the crushing chamber 801.

[0066] For sieving of small-diameter zinc particles after crushing, please refer to [reference needed]. Figure 1 as well as Figures 5-7The screening module includes a screening plate 802 fixedly arranged inside a screening cylinder 6. The screening plate 802 and the conical material plate 8 enclose a first screening cavity 803. A first storage cylinder 201 is connected to one side of the first screening cavity 803. The bottom of the screening cylinder 6 is also provided with a receiving plate 804 whose center end protrudes towards the screening plate 802. The receiving plate 804 and the screening plate 802 enclose a second screening cavity 805. A second storage cylinder is connected to one side of the second screening cavity 805. 202; It can be explained that the crushed small-diameter zinc particles can fall into the first screening chamber 803, and the small-diameter zinc particles can be screened again by the screening plate 802. The zinc particles that pass through the screening plate 802 can fall into the second screening chamber 805. With the vibration of the screening cylinder 6, the zinc particles in the first screening chamber 803 move to the first storage cylinder 201 for collection, and the zinc particles in the second screening chamber 805 move to the second storage cylinder 202 for collection.

[0067] It should be noted that in this embodiment, each screening chamber and each storage cylinder are under nitrogen protection to prevent the oxidation of small-diameter zinc particles.

[0068] Accordingly, this embodiment can also be provided with multiple screening chambers, without limitation, as long as the actual screening needs are met.

[0069] To facilitate the transfer and storage of zinc granules in each storage cylinder without contact with air, this embodiment can be referred to... Figures 1-3 as well as Figures 5-7Both the first storage cylinder 201 and the second storage cylinder 202 have discharge ports 407 at their bottoms. A first sealing plate 208 for closing the discharge ports 407 is slidably provided at the bottom of each storage cylinder. A first support 211 is also fixedly provided on one side of the bottom of the storage cylinder. A first guide rod 209, which slidably inserts into the first support 211, is fixedly provided on the first sealing plate 208. A fourth spring 210 is provided on the first guide rod 209, with one end fixed to the first support 211 and the other end fixed to the end of the first guide rod 209. A collection cylinder 4 is also provided on the workbench 1, and a collection pipe 401 is fixedly provided on the collection cylinder 4. A second sealing plate 402 for closing the opening of the collecting pipe 401 is slidably arranged on the upper part. A second support 404 is fixedly arranged on one side of the collecting cylinder 4. A second guide rod 405 that is slidably inserted into the second support 404 is fixedly arranged on the second sealing plate 402. A fifth spring 406 is provided on the second guide rod 405. One end of the fifth spring 406 is fixed to the second support 404, and the other end is fixed to the end of the second guide rod 405. The first sealing plate 208 has a first arc-shaped groove 408 for closing and fitting with the collecting pipe 401, and the second sealing plate 402 has a second arc-shaped groove 403 for fitting with the wall of the storage cylinder. It can be explained that, in this embodiment, when collecting zinc particles from each storage cylinder, the collecting cylinder 4, which is protected by nitrogen, is first transferred to the workbench 1. Then, the collecting cylinder 4 is driven to move towards the storage cylinder. During the movement, the second arc-shaped groove 403 on the second sealing plate 402 first comes into contact with the cylinder wall of the storage cylinder and stops moving. As the collecting cylinder 4 continues to move, the second sealing plate 402 can compress the fifth spring 406 and generate elastic force. During this process, the opening of the collecting pipe 401 slides against the bottom of the storage cylinder to prevent nitrogen leakage from the collecting cylinder 4. As the collecting cylinder 4 continues to move, the collected material... The tube body of pipe 401 is fitted into the first arc-shaped groove 408 of the first sealing plate 208, thereby pushing the first sealing plate 208 to move. During the movement of the first sealing plate 208, it can compress the fourth spring 210 and generate elastic force. As the collecting pipe 401 is connected to the discharge port 407, the zinc particles in the storage cylinder can be discharged into the collecting cylinder 4 along the discharge port 407 and the collecting pipe 401. During the whole process, nitrogen gas will not leak, and the zinc particles will not come into contact with the outside air and oxidize, resulting in better protection. After collection is completed, as the collecting cylinder 4 moves backward, the fourth spring 210 and the fifth spring 406 can synchronously drive each component to reset.

[0070] In addition, you can refer to Figures 1-5 In order to vibrate the screening cylinder 6, the screening cylinder 6 is fixed to the positioning cylinder 3 by a number of circumferentially arranged return springs 301, and the positioning cylinder 3 is equipped with a vibration motor 806.

[0071] To facilitate the adjustment of the positions of each storage cylinder and the collection cylinder 4, the positioning cylinder 3 is fixed to the rotating disk 101 by support legs. A rotary motor 102 is fixedly installed at the bottom of the workbench 1, and the drive end of the rotary motor 102 is fixedly connected to the rotating disk 101. It can be explained that when collecting zinc particles in different storage cylinders, the rotary motor 102 drives the rotating disk 101 to rotate, and the rotating disk 101 can synchronously drive the positioning cylinder 3 and the screening cylinder 6 to rotate, so as to automatically adjust the positions of the storage cylinder and the collection cylinder 4 to correspond.

[0072] A sieving method for a multi-stage sieving device used in zinc particle preparation includes the following steps:

[0073] Please see Figures 1-2 S1. Temporarily store the large-diameter zinc particles to be processed in hopper 5;

[0074] S2. The feeding assembly adjusts the hopper 5 to connect with the feed inlet 601, and conveys the large-diameter zinc particles in the hopper 5 to the crushing chamber 801.

[0075] S3. After the conveying is completed, the material conveying component adjusts the hopper 5 to disconnect from the feed inlet 601;

[0076] S4. The vacuum equipment and vacuum tube 203 work together to evacuate the crushing chamber 801. The inert gas conveying equipment and inert gas conveying tube 204 work together to convey inert gas into the crushing chamber 801.

[0077] S5. After crushing, the screening module performs multi-stage screening of small-diameter zinc particles.

[0078] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A multi-stage screening device for the preparation of zinc particles, comprising a worktable (1), characterized in that, The workbench (1) is provided with a screening cylinder (6), a conical material plate (8) is provided inside the screening cylinder (6) near the top opening, and a cylinder cover (2) for sealing the opening is provided on the screening cylinder (6), with a feed inlet (601) on the cylinder cover (2). The conical material plate (8) and the cylinder cover (2) enclose a crushing chamber (801). The crushing chamber (801) is equipped with a crushing mechanism for crushing large-diameter zinc particles. The feed inlet (601) is equipped with a hopper (5) for storing large-diameter zinc particles. The bottom of the hopper (5) is connected to the feed inlet (601) through a conveying assembly for intermittently and in equal quantities conveying large-diameter zinc particles into the crushing chamber (801). The cylinder cover (2) is connected to a vacuum tube (203) on one side and an inert gas delivery tube (204) on the other side. The screening cylinder (6) is also equipped with a screening module for multi-stage screening of small-diameter zinc particles after crushing; the conveying assembly includes a conveying square cylinder (501) fixed to the bottom of the hopper (5), a conveying cylinder (502) between the conveying square cylinders (501), and a receiving cylinder (510) fixedly arranged on the inlet (601) and slidably inserted into the conveying square cylinder (501); a conveying roller (511) is rotatably arranged inside the conveying cylinder (502). The cone-shaped material plate (8) has a discharge port (807) at its center end; the crushing chamber (801) is also equipped with a sealing mechanism to adjust the opening or closing of the discharge port (807); The blocking mechanism includes a blocking rod (905) embedded in the discharge port (807). The outer diameter of the blocking rod (905) is smaller than the inner diameter of the discharge port (807). The blocking rod (905) is connected to the lifting mechanism that drives its lifting. The bottom of the sealing rod (905) is fixedly equipped with a plug (906) with an outer diameter larger than the inner diameter of the discharge port (807). The end of the sealing rod (905) away from the plug (906) is fixedly connected to the support cylinder (901), and the center end of the cylinder cover (2) is rotatably provided with a limiting cylinder (9); the lifting mechanism includes a lifting rod (207) fixed on the limiting cylinder (9), the other end of the lifting rod (207) is rotatably connected to the L-shaped bracket (506), the end of the L-shaped bracket (506) is fixedly provided with a rack (505), the outside of the conveying cylinder (502) is rotatably provided with a first gear (504) fixedly connected to the conveying roller (511), and the rack (505) meshes with the first gear (504).

2. A multi-stage screening device for the preparation of zinc particles as claimed in claim 1, characterized in that, The roller wall of the conveying roller (511) slides against the inner wall of the conveying cylinder (502). The roller wall of the conveying roller (511) is provided with a conveying groove (512) for transferring zinc particles. The conveying roller (511) is fixed to the output end of the conveying motor (503) fixed on the outside of the conveying cylinder (502).

3. The multi-stage sieving device for zinc particle preparation as described in claim 1, characterized in that, A limiting disc (903) is slidably arranged inside the support cylinder (901). A limiting shaft (902) is fixedly arranged at the axial end of the limiting disc (903). A first spring (904) is fixedly arranged at both ends of the limiting shaft (902).

4. The multi-stage sieving device for zinc particle preparation as described in claim 1, characterized in that, The sealing rod (905) has several sets of keyways (907) arranged in a circumferential array. The crushing mechanism includes a blade ring (908) that is slidably sleeved on the sealing rod (905). Several sets of key seats that are slidably engaged with the keyways (907) are fixedly arranged on the blade ring (908). Several sets of crushing blades (909) are fixedly arranged in a circumferential array on the outer edge of the blade ring (908). The sealing rod (905) is also provided with a third spring (910). Several sets of positioning holes (911) are arranged in a circumferential array on the wall of the support cylinder (901). A positioning rod (912) that is fixedly connected to the limiting cylinder (9) is slidably inserted into the positioning hole (911). The second gear (206) is fixedly arranged on the lifting rod (207), and the crushing motor (7) is fixedly arranged on one side of the L-shaped bracket (506). The output end of the crushing motor (7) is fixedly arranged with a third gear (205) that meshes with the second gear (206).

5. The multi-stage sieving device for zinc particle preparation as described in claim 1, characterized in that, The screening module includes a screening plate (802) fixedly arranged in the screening cylinder (6), the screening plate (802) and the conical material plate (8) enclose to form a first screening cavity (803), and a first storage cylinder (201) is connected to one side of the first screening cavity (803). The bottom of the screening cylinder (6) is provided with a receiving plate (804) with its center end protruding towards the screening plate (802). The receiving plate (804) and the screening plate (802) enclose to form a second screening cavity (805). A second storage cylinder (202) is connected to one side of the second screening cavity (805).

6. A multi-stage screening device for preparing zinc particles as described in any one of claims 5, characterized in that, Both the first storage cylinder (201) and the second storage cylinder (202) have discharge ports (407) at their bottoms. The bottom of the storage cylinder is provided with a first sealing plate (208) for closing the discharge port (407). A first support (211) is also fixedly provided on one side of the bottom of the storage cylinder. A first guide rod (209) is fixedly provided on the first sealing plate (208) and is slidably inserted into the first support (211). A fourth spring (210) is provided on the first guide rod (209).

7. The multi-stage screening device for zinc particle preparation as described in claim 6, characterized in that, The workbench (1) is also provided with a collection cylinder (4), a collection pipe (401) is fixedly arranged on the collection cylinder (4), a second sealing plate (402) for sealing the opening of the collection pipe (401) is also slidably arranged on the collection cylinder (4), a second support (404) is fixedly arranged on one side of the collection cylinder (4), a second guide rod (405) that is slidably inserted into the second support (404) is fixedly arranged on the second sealing plate (402), and a fifth spring (406) is provided on the second guide rod (405). The first sealing plate (208) has a first arc-shaped groove (408) for closing and fitting with the collecting pipe (401), and the second sealing plate (402) has a second arc-shaped groove (403) for fitting with the wall of the storage cylinder.

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