Nickel-iron powder grinding and preparation device

Abstract

This invention discloses a nickel-iron powder grinding and preparation apparatus, comprising a base on which a conveying system, a grinding system, and a dust collection system are mounted. The conveying system includes a hopper and a belt conveyor. The grinding system includes a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device, and a cooling pipe assembly. The dust collection system includes a fan assembly, a centrifugal dust collector, and a bag filter dust collector. This invention enables highly efficient grinding of nickel-iron alloys.

Description

Technical Field

[0001] This invention relates to the field of nickel-iron powder grinding and preparation apparatus, specifically a nickel-iron powder grinding and preparation apparatus. Background Technology

[0002] Nickel-iron alloys are characterized by high hardness and ductility. They are an important intermediate product obtained from the smelting of laterite ore and are also an important upstream material required by industries such as stainless steel and batteries. In stainless steel, nickel can improve the alloy's ductility, corrosion resistance, and high-temperature strength. Using nickel-iron alloys is less expensive than using pure nickel directly. In the battery field, nickel-iron alloys are precursors for positive electrode materials such as nickel-cadmium and nickel-metal hydride batteries.

[0003] Nickel-iron alloys smelted from nickel oxide ore, also known as laterite ore, often have large particle sizes and irregular block shapes, making them unsuitable for subsequent leaching and melting processes. Further pretreatment is required to produce them as powder. Currently, the commonly used atomization method involves melting the nickel-iron alloy and then dispersing it into fine particles by impacting the molten metal with high-pressure airflow or water. This method requires significant equipment investment, is highly complex, energy-intensive, and has high operating costs. While traditional mechanical ball milling is lower in cost, it is not effective for grinding highly ductile nickel-iron alloys and therefore needs improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a nickel-iron powder grinding and preparation apparatus to solve the problems mentioned in the background art, which has the advantage of efficient grinding of nickel-iron alloys.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a nickel-iron powder grinding and preparation apparatus, comprising a base, wherein a conveying system, a grinding system and a dust collection system are provided on the base, the conveying system comprises a hopper and a belt conveyor, the grinding system comprises a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device and a cooling pipe assembly, and the dust collection system comprises a fan assembly, a centrifugal dust collector and a bag dust collector.

[0006] By adopting the above technical solution, the blocky nickel-iron alloy in the hopper is conveyed into the weighing bin by a belt conveyor. After weighing, it enters the grinding chamber through the feed pipe assembly. The grinding wheel rotates under the drive of the transmission device and the rotating shaft, driving the grinding hammer to strike the blocky material. The ground nickel-iron alloy powder enters the classification chamber and rises under the airflow drawn by the fan. When it encounters the rotating classification wheel, the fine particles that meet the standard enter the conveyor pipe, while the larger particles are knocked down into the material tray and re-enter the grinding chamber. The qualified nickel-iron alloy powder is then subjected to multi-stage dust collection by the dust collection system. The airflow carrying powder enters the primary centrifugal dust collector tangentially through the inlet. After passing through the primary stage, it enters the secondary dust collector through two 90-degree bends from its outlet pipe. The alloy powder thrown against the wall by the centrifugal force of the primary and secondary dust collectors slides off the wall and falls into the ash hopper below. After being aggregated into larger particles by the centrifugal force of the two dust collectors, the airflow enters the bag dust collection chamber, where the filter bags filter and intercept fine particles. The filter bags need to be back-blown and cleaned regularly to prevent clogging. The particles shaken off by the back-blowing also fall into the ash hopper. Finally, the alloy powder accumulated in the ash hopper is discharged through the discharge valve.

[0007] As a further aspect of the present invention: a grinding machine body is provided on the base, a liner plate is provided on the outer side of the grinding machine body surrounding the circumference of the grinding machine body, the liner plate is provided with an inlet and an outlet with openings facing upwards, and a cooling chamber is provided inside the liner plate communicating with the inlet and the outlet.

[0008] By adopting the above technical solution, the current liner plate has a serious problem of overheating. Because the heat cannot be dissipated in time, significant heat accumulation occurs. Heat dissipation is achieved only through heat conduction between the metal and the air, which has low heat transfer efficiency and restricts the grinding efficiency and the stable operation of subsequent processes. The liquid enters from the inlet, fills the cooling chamber, and flows out from the outlet. During the liquid flow, it carries away the heat on the liner plate. The liquid adopts a top-in, top-out method, which not only avoids liquid accumulation inside but also allows air to be discharged from the cooling structure.

[0009] As a further embodiment of the present invention: the cooling chamber includes a first compartment, a second compartment, a third compartment and a fourth compartment that are interconnected, a flow guide plate is provided between the first compartment, the second compartment, the third compartment and the fourth compartment, an O-ring is provided between the liner and the grinding machine body, and an end cap is provided on the side of the grinding machine body.

[0010] By adopting the above technical solution, the cooling chamber is divided into a first compartment, a second compartment, a third compartment, and a fourth compartment, thereby reducing the cross-sectional area of ​​the cooling chamber, accelerating the liquid flow rate, and thus improving heat dissipation efficiency. Drainage plates are located at the ends of each compartment. This structure prevents the accumulation of stagnant water that cannot be drained and connects the compartments. Furthermore, this design acts as a turbulence-inducing structure, reducing the near-static boundary layer generated during liquid flow and preventing this layer from hindering heat dissipation like an insulation layer. O-rings are installed outside the cooling chamber to ensure its sealing.

[0011] As a further embodiment of the present invention: the cooling chamber is provided with baffles at the water inlet and water outlet, and the inner side of the cooling chamber is provided with a multi-tooth structure.

[0012] By adopting the above technical solution, the flow guide plate and baffle are welded to the machine base, which avoids problems such as processing waste and time consumption. It also allows the use of materials with high thermal conductivity, such as brass. The multi-tooth structure can increase the contact area between the liquid and the metal, and can be processed by welding, turning, casting and other methods.

[0013] As a further embodiment of the present invention, it also includes a transmission pipe. The cooling pipe assembly includes a main pipe, and an air intake pipe communicating with the main pipe is provided on the side of the main pipe. The air intake pipe is inclined relative to the main pipe. A fan is provided at one end of the air intake pipe. The main pipe has an opening for insertion of the air intake pipe. The inclination angle between the air intake pipe and the main pipe is set to 45°. A butterfly valve is provided on the side of the air intake pipe. A temperature sensor is provided on the side of the main pipe.

[0014] By adopting the above technical solution, this invention utilizes the negative pressure generated by a fan to draw cold air from outside the main pipe into the main pipe. Through a rational structural design, a swirling flow is generated within the pipe to improve heat dissipation and dust removal efficiency. This design ensures that the gas entering the pipe does not interfere with the normal flow direction of the material and gas within the pipe, while effectively creating a swirling effect. The generation of the swirling flow enhances the turbulence of the fluid, thereby more efficiently removing a large amount of heat adhering to the material surface and improving the overall cooling performance of the system. Simultaneously, this gas flow pattern facilitates thorough mixing of the material and airflow, creating favorable conditions for the subsequent dust removal process. This significantly improves the separation efficiency and processing capacity of the downstream bag filter and cyclone dust collector. An adjustable butterfly valve is specifically added upstream of the inlet to precisely control the speed and pressure of the fluid entering the pipe. After the valve is opened, the fan creates negative pressure inside the pipeline, causing cold air from outside to rush into the pipeline, lowering the temperature inside. An adjustable butterfly valve allows for adjustable gas flow to adapt to various operating conditions. A temperature sensor monitors the real-time temperature inside the pipeline, enabling flexible adjustment of the butterfly valve opening and thus achieving dynamic control of fluid parameters. This control mechanism optimizes the system's operating state, enhances operational adaptability and responsiveness, and ensures stable and efficient operation of the entire system under complex and changing conditions.

[0015] As a further embodiment of the present invention: It includes a spindle body, the spindle body having a blind hole into which a water-cooled long tube is inserted. One end of the water-cooled long tube has a sealing cover, and a reflux plate is provided on one side inside the sealing cover. One end of the water-cooled long tube has a water inlet and a water outlet. A first flow hole penetrating the reflux plate is provided in the middle of the reflux plate. The reflux plate has multiple second flow holes distributed around the center of the first flow hole. A flange is integrally connected to the side of the water-cooled long tube. A rotary joint is connected to the water-cooled long tube via the flange. The rotary joint is sleeved around the circumference of the water-cooled long tube. One side of the reflux plate and the sealing cover is sealed with an oil seal. A bearing is provided inside the rotary joint. The opening direction of the water outlet is upward.

[0016] By adopting the above technical solution, the blind hole is a non-through hollow cavity used to house a long water-cooling tube, with a certain gap between one end of the blind hole and the long water-cooling tube. Cooling water is injected from the inlet, filling the gap in this axial blind hole, and then flows out from the outlet through the return plate, thereby efficiently cooling the spindle body and effectively preventing deformation and damage to the spindle body and bearings due to overheating. The return plate is welded to the sealing cover and the long water-cooling tube, and is a hollow structure with channels, which can provide reliable support and fixation for the long water-cooling tube and ensure smooth flow of cooling water. One end of the rotary joint is connected to the spindle body and rotates synchronously with it, while the other end is fixed to the stationary sealing cover through a flange, thus achieving a sealed connection between the rotating spindle body and the fixed water circuit. The outlet is located at the top, ensuring that the cooling water only begins to overflow after completely filling all the gaps in the axial blind hole, thereby ensuring sufficient heat exchange time between the cooling water and the spindle body.

[0017] As a further embodiment of the present invention, it also includes a support frame, on which an upper housing is mounted, in which filter bags are installed, and below the support frame, a dust hopper is mounted below the upper housing. A primary cyclone dust collector and a secondary cyclone dust collector, connected to each other, are installed in the dust hopper. An air outlet is provided at the upper end of the upper housing. Two primary and two secondary cyclone dust collectors are provided. An air inlet is provided on the side of the upper end of the primary cyclone dust collector. A bent pipe is connected to the upper end of the primary cyclone dust collector, and the bent pipe is connected to the secondary cyclone dust collector.

[0018] By adopting the above technical solution, a primary cyclone dust collector and a secondary cyclone dust collector are installed in the space of the ash hopper below the bag filter. Flue gas enters the primary dust collector tangentially through the inlet. After being cleaned by the primary cyclone dust collector, it enters the secondary cyclone dust collector through an elbow for further purification. After the two stages of dust removal remove larger particles, the flue gas escapes from the outlet of the secondary cyclone dust collector and enters the main body of the bag filter. Fine particles are removed by the filter bags, and the purified airflow then escapes from the outlet. Dust particles thrown against the wall by the centrifugal force of the two cyclone dust collectors slide off the wall and fall into the ash hopper. Together with particles shaken off by the backflushing of the filter bags, they are discharged through the discharge valve. Two primary and two secondary cyclone dust collectors are installed to increase dust removal efficiency.

[0019] As a further embodiment of the present invention: the upper end of the secondary cyclone dust collector is provided with a dust-covering top cover, and an air outlet is provided between the dust-covering top cover and the upper side of the secondary cyclone dust collector; the bend is set at 90°; the lower end of the ash hopper is provided with a discharge valve; the upper side of the upper box is provided with a tube sheet; the side of the upper box is provided with an air tank assembly; the air pipe assembly is connected to multiple dust blowing pipes; and an air blowing pipe is provided on one side of each dust blowing pipe.

[0020] By adopting the above technical solution, some large particles of the flue gas are removed by the cyclone dust collector before it passes through the bag filter, reducing the load on the filter bags and decreasing the frequency of filter bag cleaning and replacement. The built-in cyclone dust collector has a good cooling effect on high-temperature flue gas, reducing the temperature of the flue gas entering the filter bags, which helps to delay filter bag aging and extend service life. Integrating a small cyclone dust collector into the ash hopper of the bag filter results in a simple structure, convenient operation, and only an increase in height of approximately 1.4m. Compared with placing other types of dust collectors before the bag filter, this structure does not increase the floor space. While maintaining a certain area, the dust removal efficiency has been improved. The top of the secondary cyclone dust collector is equipped with a conical dust-blocking cover to prevent dust from falling into the bag filter during backflushing cleaning. The dust hopper space of the bag filter has been lengthened, and the overall height has been increased by about 1.4m to meet the installation requirements of small cyclone dust collectors. The primary and secondary dust collectors adopt two sets of parallel series structures, which not only increases the amount of dust handled and improves the particle removal efficiency, but also ensures the uniform distribution of the airflow entering the bag filter. The cyclone dust collector support is welded to the inner wall of the dust hopper, with no support legs, reducing the footprint.

[0021] As a further embodiment of the present invention: a grinding wheel is included, and a plurality of positioning blocks are integrally connected to the grinding wheel in the circumferential direction, which are equidistantly distributed about the center of the grinding wheel. The positioning blocks are connected to a grinding hammer by bolts. The grinding hammer has a second groove for accommodating the bolt head and a first groove for accommodating the bolt body inside.

[0022] By adopting the above technical solution, the bolt is placed in the first groove and the second groove to conceal it, thereby preventing the bolt head from being exposed and avoiding excessive wear.

[0023] As a further embodiment of the present invention: the positioning block is provided with an inwardly recessed groove, the grinding hammer is integrally connected with a locking block that is inserted into the groove, and the width of the second groove is greater than the width of the first groove.

[0024] By adopting the above technical solution, the combination of the card block and the card slot increases the connection strength between the grinding hammer and the positioning block. The grinding hammer is designed with two closely spaced U-shaped grooves inside. The first groove is smaller and wide enough for a bolt to pass through. The second groove is larger and its width and depth are large enough to accommodate the bolt head. When assembled with the positioning block, the bolt head can be hidden in the second groove to prevent the bolt head from being exposed and subjected to a lot of wear.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1. When the first compartment is about to be filled, the liquid flows into the second compartment through the drainage plate of the first compartment, and so on, with drainage plates added in each compartment.

[0026] 2. In the specific implementation process, the multi-tooth design underwent meticulous calculations and simulations to ensure that the contact area between the liquid and the metal is maximized within a limited space, allowing heat to be transferred more quickly from the metal liner to the cooling liquid. The addition of the guide plate not only separates the flow units but also acts as an additional heat dissipation surface, enhancing the overall heat dissipation performance. Furthermore, by precisely controlling the cross-sectional area of ​​the pipe, a high flow velocity is maintained during the liquid flow process, which helps to shorten the residence time of the liquid on the liner surface and prevent localized overheating. 3. By using the negative pressure generated by the fan, cold air outside the duct is drawn into the main duct, and through reasonable structural design, swirling air is generated inside the duct to improve heat dissipation and dust removal efficiency. 4. The blind hole is a non-through hollow cavity used to house a long water-cooling tube, with a certain gap between one end of the blind hole and the long water-cooling tube. Cooling water is injected from the inlet, filling the gap in this axial blind hole, and then flows out from the outlet through the return plate, thereby efficiently cooling the spindle body and effectively preventing deformation and damage to the spindle body and bearings due to overheating. 5. The bolt is concealed within the first and second grooves to prevent the bolt head from being exposed and thus avoids excessive wear. The locking block and the locking groove work together to increase the connection strength between the grinding hammer and the positioning block. The grinding hammer has two adjacent U-shaped grooves inside. The first groove is smaller and wide enough for the bolt to pass through, while the second groove is larger and wide and deep enough to accommodate the bolt head. When assembled with the positioning block, the bolt head can be concealed within the second groove to prevent the bolt head from being exposed and subjected to excessive wear.

[0027] 6. The grinding hammer has two closely spaced U-shaped grooves inside. The first groove is smaller and wide enough for a bolt to pass through. The second groove is larger and wide and deep enough to accommodate a bolt head. When assembled with the positioning block, the bolt head can be hidden in the second groove to prevent the bolt head from being exposed and subjected to a lot of wear. 7. The grinding hammer is made of high-hardness material and is mounted on the grinding wheel by a positioning block. The worn grinding hammer can be replaced periodically. The nickel-iron alloy has high hardness and generates a lot of heat during the grinding process. In order to ensure the efficient and continuous operation of the equipment, the grinding system is equipped with multiple water-cooling structures: the shaft water-cooling structure, the grinding zone liner water-cooling structure, and the conveyor pipe water-cooling pipeline. 8. Simple operation and low equipment investment and operating costs: Adopting a pure mechanical crushing principle, compared with the atomization method which requires melting materials, the equipment investment and operating energy consumption are significantly reduced; at the same time, the integrated "two-stage centrifugal + bag" high-efficiency collection system achieves high recovery rate of qualified powder collection, and the particle size is controllable and flexible: By using a classifying wheel with adjustable speed, the fineness of the output powder can be precisely controlled (e.g., up to 200 mesh), and the powder particle size can be flexibly adjusted according to the downstream process requirements, making the product more adaptable and convenient for daily maintenance and parts replacement: The core vulnerable parts such as the grinding hammer and the crescent plate of the material tray adopt a replaceable design, and by setting a manhole door in the classifying chamber, maintenance costs and downtime are greatly reduced, significantly improving the maintainability and overall service life of the equipment, and effectively overcoming the grinding problem of highly ductile materials: For the characteristics of high hardness and high ductility of nickel-iron alloy, a high-hardness grinding hammer and a material tray structure with grinding function are designed, which has a better grinding effect on such materials than the traditional mechanical ball milling method. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a schematic diagram of the grinding system. Figure 3 This is a schematic diagram of the structure of the fan silencer and feed pipe assembly in the embodiment; Figure 4 A structural diagram showing the connection relationship between the material support basin, the crescent-shaped plate, and the support plate; Figure 5 This is a schematic diagram of the crescent-shaped plate. Figure 6 This is a schematic diagram of the structure of the grinding machine body; Figure 7 This is a front view of the grinding machine body; Figure 8 This is a top view of the grinding machine body; Figure 9 This is a schematic diagram of the cooling piping assembly. Figure 10 for Figure 9 A sectional view along direction A. Figure 11 for Figure 10 Cross-sectional view along the BB direction; Figure 12 Application diagram of the main spindle body; Figure 13 This is a schematic diagram of the structure of an embodiment; Figure 14 for Figure 13 A magnified view of part I; Figure 15 This is a schematic diagram of the structure of the water-cooled long pipe in the embodiment; Figure 16 This is a schematic diagram of the recirculation plate in the embodiment; Figure 17 This is a schematic diagram of the rotary joint in the embodiment; Figure 18 This is a cross-sectional view of the rotary joint; Figure 19 This is a schematic diagram of the internal structure of the dust collection system; Figure 20 This is a schematic diagram of the structure of an embodiment; Figure 21 for Figure 20 A cross-sectional view along the AA direction; Figure 22 for Figure 20 Cross-sectional view along the BB direction; Figure 23 This is a schematic diagram of the structure of an embodiment; Figure 24 This is a schematic diagram of the internal structure of a grinding hammer; Figure 25 This is a schematic diagram of the grinding hammer from another perspective. Figure 26 This is a schematic diagram of the hierarchical chamber. Figure 27 for Figure 8 A structural diagram from another perspective; Figure 28 This is a schematic diagram of the grinding hammer.

[0029] In the diagram: 1. Base; 2. Grinding machine body; 3. Liner; 4. Inlet; 5. Outlet; 6. First compartment; 7. Second compartment; 8. Third compartment; 9. Drain plate; 10. O-ring; 11. End cap; 12. Baffle; 13. Fourth compartment; 14. Conveyor pipe; 15. Main pipe; 16. Air inlet pipe; 17. Fan; 18. Orifice; 19. Butterfly valve; 20. Main shaft body; 21. Blind hole; 22. Water-cooled long pipe; 23. Sealing cover; 24. Return plate; 25. Inlet; 26. Outlet; 27. First flow hole; 28. Second flow hole; 29. ​​Flange; 30. Rotary joint; 31. Bearing; 32. Support; 33. Upper housing; 34. Filter bag; 35. Dust hopper; 36. Primary cyclone dust collector; 37. Secondary cyclone dust collector 38. Air outlet; 39. Air inlet; 40. Bend; 41. Dust-covering top cover; 42. Air outlet; 43. Unloading valve; 44. Tube plate; 45. Air tank assembly; 46. Dust blowing pipe; 47. Air blowing pipe; 48. Grinding wheel; 49. Positioning block; 50. Grinding hammer; 51. First groove; 52. Second groove; 53. Slot; 54. Slot block; 55. Grading chamber; 56. Grading wheel; 57. Material tray; 58. Crescent plate; 59. Support plate; 60. Conveying system; 61. Grinding system; 62. Dust collection system; 63. Weighing bin; 64. Centrifugal dust collector; 65. Bag dust collector; 66. Hopper; 67. Belt conveyor; 68. Fan silencer; 69. Feed pipe assembly; 70. Conveying pipe; 71. Cooling pipe assembly; 72. Fan assembly. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In this embodiment of the invention, A nickel-iron powder grinding and preparation apparatus includes a base, on which a conveying system, a grinding system, and a dust collection system are mounted. The conveying system includes a hopper and a belt conveyor. The grinding system includes a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device, and a cooling pipe assembly. The dust collection system includes a fan assembly, a centrifugal dust collector, and a bag filter dust collector. A fan silencer is installed at one end of the feed pipe assembly.

[0032] The base 1 is provided with a grinding machine body 2. The outer side of the grinding machine body 2 is provided with a liner 3 surrounding the circumference of the grinding machine body 2. The liner 3 is provided with an inlet 4 and an outlet 5, both with their openings facing upwards. The interior of the liner 3 is provided with a cooling chamber that communicates with the inlet 4 and the outlet 5.

[0033] The cooling chamber includes a first compartment 6, a second compartment 7, a third compartment 8, and a fourth compartment 13 that are interconnected.

[0034] A drainage plate 9 is provided between the first compartment 6, the second compartment 7, the third compartment 8 and the fourth compartment 13.

[0035] An O-ring 10 is provided between the liner 3 and the grinding machine body 2.

[0036] The grinding machine body 2 is provided with an end cap 11 on its side.

[0037] The cooling chamber is equipped with baffles 12 located at the water inlet 4 and the water outlet 5.

[0038] The inner side of the cooling chamber is configured with a multi-tooth structure.

[0039] It is worth noting that the liner 3 is arranged in an arc shape around the circumference of the base 1.

[0040] The cooling pipe assembly includes a conveying pipe 14 and a main pipe 15. An air intake pipe 16 communicating with the main pipe 15 is provided on the side of the main pipe 15. The air intake pipe 16 is inclined relative to the main pipe 15. A fan 17 is provided at one end of the air intake pipe 16. There are two conveying pipes 14 and they are distributed at both ends of the cooling pipe assembly.

[0041] A dust collection box is installed between the fan 17 and the conveying pipe 14.

[0042] The main pipe 15 has an opening 18 for inserting an air intake pipe 16, and the inclination angle between the air intake pipe 16 and the main pipe 15 is set to 45°. A butterfly valve 19 is provided on the side of the air intake pipe 16.

[0043] A temperature sensor (not shown) is installed on the side of the main pipe 15.

[0044] The device includes a spindle body 20, which has a blind hole 21. A water-cooled long tube 22 is inserted into the blind hole 21. A sealing cover 23 is provided at one end of the water-cooled long tube 22. A return plate 24 is provided on one side inside the sealing cover 23. A water inlet 25 and a water outlet 26 are provided at one end of the water-cooled long tube 22.

[0045] The reflux plate 24 has a first flow hole 27 penetrating through the middle of the reflux plate 24, and the reflux plate 24 has a plurality of second flow holes 28 distributed around the center of the first flow hole 27.

[0046] A flange 29 is integrally connected to the side of the water-cooled long tube 22. A rotary joint 30 is connected to the water-cooled long tube 22 through the flange 29. The rotary joint 30 is sleeved around the circumference of the water-cooled long tube 22. The rotary joint mainly consists of a fixed shell, a rotating body, and a bearing between the two.

[0047] The return plate 24 and the sealing cover 23 are sealed on one side by an oil seal.

[0048] A bearing 31 is provided on the inner side of the rotary joint 30.

[0049] The opening direction of the water outlet 26 is set to face upward.

[0050] High-performance sealing rings are provided on the mating surfaces of the rotary joint 30 and the spindle body 20, as well as between the connecting end faces of each flange 29, to prevent coolant leakage.

[0051] The negative pressure generated by the fan 17 draws cold air from outside the pipe into the main pipe 15, and the reasonable structural design creates swirling flow inside the pipe to improve heat dissipation and dust removal efficiency.

[0052] The centrifugal dust collector includes a support frame 32, an upper housing 33 mounted on the support frame 32, filter bags 34 installed inside the upper housing 33, a dust hopper 35 located below the upper housing 33 mounted below the support frame 32, and a primary cyclone dust collector 36 and a secondary cyclone dust collector 37 connected to each other installed in the dust hopper 35. An air outlet 38 is located at the upper end of the upper housing 33.

[0053] Two primary cyclone dust collectors 36 and two secondary cyclone dust collectors 37 are each provided.

[0054] An air inlet 39 is provided on the upper side of the primary cyclone dust collector 36, and a bend 40 is connected to the upper end of the primary cyclone dust collector 36. The bend 40 is connected to the secondary cyclone dust collector 37.

[0055] The upper end of the secondary cyclone dust collector 37 is provided with a dust-shielding top cover 41, and an air outlet 42 is provided between the dust-shielding top cover 41 and the upper side of the secondary cyclone dust collector 37.

[0056] The bend 40 is set to 90°.

[0057] The lower end of the ash hopper 35 is provided with a discharge valve 43.

[0058] The upper box 33 is provided with a perforated plate 44 on its upper side, and an air tank assembly 45 is provided on the side of the upper box 33. The air pipe assembly is connected to multiple soot blowing pipes 46.

[0059] An air blowing pipe 47 is provided on one side of the soot blowing pipe 46.

[0060] The pulse-jet cleaning system of a baghouse dust collector consists of an air tank assembly, a soot blowing pipe, and an air blowing pipe. Multiple soot blowing pipes are connected to the air tank, each corresponding to a row of filter bags. Each soot blowing pipe is connected to a row of air blowing pipes, with each air blowing pipe directly above the opening of a filter bag. The air tank assembly is mainly used to store and retain compressed air supplied by the air compressor. When the pulse valve opens instantaneously, the air tank can output a large flow rate and high velocity of gas, forming a powerful jet of air. This air is then conveyed through the soot blowing pipe and the air blowing pipe and injected into the filter bags, causing the filter bags to expand rapidly and shake off the dust.

[0061] The tube sheet is a horizontally placed steel plate in a baghouse dust collector, with numerous precisely drilled holes that match the diameter of the filter bags. The filter bags of the baghouse dust collector are mainly suspended and fixed through the tube sheet. In addition, the tube sheet can completely separate the clean room above from the dust-containing room, preventing unpurified airflow from escaping.

[0062] It includes a grinding wheel 48, and a plurality of positioning blocks 49 are integrally connected to the grinding wheel 48 around the center of the grinding wheel 48 at equal distances. The positioning blocks 49 are connected to a grinding hammer 50 by bolts. The grinding hammer 50 has a second groove 52 for accommodating the bolt head and a first groove 51 for accommodating the bolt body inside.

[0063] The positioning block 49 is provided with an inwardly recessed groove 53, and the grinding hammer 50 is integrally connected with a locking block 54 that is inserted into the groove 53.

[0064] The width of the second groove 52 is greater than the width of the first groove 51.

[0065] It also includes a grading chamber, in which a grading wheel is installed. The rotation speed of the grading wheel is adjustable to control the size of the screened particles. The material support basin consists of a crescent plate and a support plate. The inclined plate in the support plate supports the alloy particles knocked down by the grading wheel and allows them to slide to the grinding area for further grinding. The crescent plate has a gear structure and is fixed to the support plate with screws. It has a grinding function and can be replaced after wear. The grading chamber is equipped with a manhole door for the periodic replacement of the crescent plate and grinding hammer in the material support basin. A fan silencer is installed at the end of the feed pipe assembly to reduce operating noise.

[0066] The grading chamber is connected to the grinding chamber at the front and to the conveyor pipe at the back. It contains a material tray and a sorting device and serves as a buffer zone between the grinding system and the dust collection system. Grinded particles enter the chamber, and powder that passes the screening by the grading wheel is drawn into the conveyor pipe by the fan. Unqualified particles fall into the material tray below for storage.

[0067] Working principle: When the first compartment 6 is about to be filled, the liquid flows into the second compartment 7 through the drainage plate 9 of the first compartment 6, and so on, with drainage plates 9 added in each compartment.

[0068] In the implementation process, the multi-tooth design underwent meticulous calculations and simulations to maximize the contact area between the liquid and the metal within a limited space, allowing heat to be transferred more quickly from the metal liner 3 to the cooling liquid. The addition of the guide plate 9 not only separates the flow units but also acts as an additional heat dissipation surface, enhancing the overall heat dissipation performance. Furthermore, by precisely controlling the cross-sectional area of ​​the pipe, a high flow velocity is maintained during the liquid flow, which helps to shorten the residence time of the liquid on the surface of the liner 3 and prevent localized overheating.

[0069] The blind hole 21 is a non-through hollow cavity used to house the water-cooling tube 22, with a certain gap between one end of the blind hole 21 and the water-cooling tube 22. Cooling water is injected from the inlet, filling the gap in the axial blind hole 21, and then flows out from the outlet 26 through the return plate 24, thereby efficiently cooling the spindle body 20 and effectively preventing deformation and damage to the spindle body 20 and bearing 31 due to overheating.

[0070] The grinding hammer 50 has two adjacent U-shaped grooves inside. The first groove 51 is smaller and wide enough for a bolt to pass through. The second groove 52 is larger and wide and deep enough to accommodate a bolt head. When assembled with the positioning block 49, the bolt head can be hidden in the second groove 52 to prevent the bolt head from being exposed and subjected to a lot of wear.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A nickel-iron powder grinding and preparation apparatus, comprising a base, wherein a conveying system, a grinding system, and a dust collection system are provided on the base, characterized in that: The conveying system includes a hopper and a belt conveyor; the grinding system includes a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device, and a cooling pipe assembly; and the dust collection system includes a fan assembly, a centrifugal dust collector, and a baghouse dust collector.

2. The nickel-iron powder grinding and preparation apparatus according to claim 1, characterized in that: The base (1) is provided with a grinding machine body (2). A liner (3) is provided around the outside of the grinding machine body (2). The liner (3) is provided with an inlet (4) and an outlet (5) with the openings facing upwards. A cooling chamber is provided inside the liner (3) that communicates with the inlet (4) and the outlet (5).

3. The nickel-iron powder grinding and preparation apparatus according to claim 2, characterized in that: The cooling chamber includes a first partition (6), a second partition (7), a third partition (8), and a fourth partition (13) that are interconnected. A flow guide plate (9) is provided between the first partition (6), the second partition (7), the third partition (8), and the fourth partition (13). An O-ring (10) is provided between the liner (3) and the grinding machine body (2). An end cap (11) is provided on the side of the grinding machine body (2).

4. The nickel-iron powder grinding and preparation apparatus according to claim 3, characterized in that: The cooling chamber is provided with baffles (12) at the water inlet (4) and water outlet (5), and the inner side of the cooling chamber is provided with a multi-tooth structure.

5. The nickel-iron powder grinding and preparation apparatus according to claim 1, characterized in that: It also includes a transfer pipe (14), the cooling pipe assembly includes a main pipe (15), an air intake pipe (16) connected to the main pipe (15) is provided on the side of the main pipe (15), the air intake pipe (16) is inclined relative to the main pipe (15), a fan (17) is provided at one end of the air intake pipe (16), the main pipe (15) has an opening (18) for the air intake pipe (16) to be inserted, the inclination angle between the air intake pipe (16) and the main pipe (15) is set to 45°, a butterfly valve (19) is provided on the side of the air intake pipe (16), and a temperature sensor is provided on the side of the main pipe (15).

6. The nickel-iron powder grinding and preparation apparatus according to claim 1, characterized in that: The transmission device includes a main shaft body (20), which has a blind hole (21). A water-cooled long tube (22) is inserted into the blind hole (21). A sealing cover (23) is provided at one end of the water-cooled long tube (22). A return plate (24) is provided on one side inside the sealing cover (23). A water inlet (25) and a water outlet (26) are provided at one end of the water-cooled long tube (22). A first flow hole (27) penetrating the return plate (24) is provided in the middle of the return plate (24). The water-cooled long pipe (22) is provided with a plurality of second flow holes (28) distributed around the center of the first flow hole (27). A flange (29) is integrally connected to the side of the water-cooled long pipe (22). The water-cooled long pipe (22) is connected to a rotary joint (30) through the flange (29). The rotary joint (30) is sleeved around the circumference of the water-cooled long pipe (22). One side of the return plate (24) and the sealing cover (23) is sealed by an oil seal. A bearing (31) is provided on the inner side of the rotary joint (30). The opening direction of the outlet (26) is set to face upward.

7. The nickel-iron powder grinding and preparation apparatus according to claim 1, characterized in that: It also includes a support (32), on which an upper box (33) is provided, and a filter bag (34) is installed inside the upper box (33). The feature is that: a dust hopper (35) is installed below the support (32) and below the upper box (33), and a primary cyclone dust collector (36) and a secondary cyclone dust collector (37) connected to each other are installed in the dust hopper (35). An air outlet (38) is provided at the upper end of the upper box (33). There are two primary cyclone dust collectors (36) and two secondary cyclone dust collectors (37). An air inlet (39) is provided on the side of the upper end of the primary cyclone dust collector (36). A bend pipe (40) is connected to the upper end of the primary cyclone dust collector (36), and the bend pipe (40) is connected to the secondary cyclone dust collector (37).

8. The nickel-iron powder grinding and preparation apparatus according to claim 7, characterized in that: The upper end of the secondary cyclone dust collector (37) is provided with a dust-covering top cover (41), and an air outlet (42) is provided between the dust-covering top cover (41) and the upper side of the secondary cyclone dust collector (37). The bend (40) is set at 90°. The lower end of the ash hopper (35) is provided with a discharge valve (43). The upper side of the upper box (33) is provided with a tube sheet (44). The side of the upper box (33) is provided with an air tank assembly (45). The air tank assembly (45) is connected to multiple soot blowing pipes (46). One side of each soot blowing pipe (46) is provided with an air blowing pipe (47).

9. The nickel-iron powder grinding and preparation apparatus according to claim 1, characterized in that: The device includes a grinding wheel (48), and a plurality of positioning blocks (49) are integrally connected around the grinding wheel (48) at equal distances from the center of the grinding wheel (48). The positioning blocks (49) are connected to a grinding hammer (50) by bolts. The grinding hammer (50) has a second groove (52) for accommodating the bolt head and a first groove (51) for accommodating the bolt body inside.

10. The nickel-iron powder grinding and preparation apparatus according to claim 9, characterized in that: The positioning block (49) is provided with an inwardly recessed groove (53), and the grinding hammer (50) is integrally connected with a locking block (54) that is inserted into the groove (53). The width of the second groove (52) is greater than the width of the first groove (51).

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