Powder processing cooling equipment

Abstract

The invention relates to the technical field of metal powder processing, in particular to powder processing cooling equipment which comprises a cooling box and a feeding hopper. The metal powder cooling device further comprises an evaporative cooling mechanism, a coil cooling mechanism, an air blower, an exhaust pipe and a material receiving mechanism, cooling liquid is injected into a cooling cavity of the cooling box, the evaporative cooling mechanism conducts primary cooling on metal powder conveyed by the feeding hopper through cooling liquid fog drops, the evaporative cooling mechanism is connected with the coil cooling mechanism, and the coil cooling mechanism is soaked in the cooling liquid. The air blower blows air to the coil pipe cooling mechanism so that the metal powder can be conveyed in the coil pipe cooling mechanism, the metal powder exchanges heat with cooling liquid through the coil pipe cooling mechanism in the conveying process to be subjected to secondary cooling, and the exhaust pipe is used for exhausting gas blown into the coil pipe cooling mechanism by the air blower. The material receiving mechanism is used for receiving the metal powder output by the coil pipe cooling mechanism; the metal powder is subjected to multi-stage cooling in the conveying process, the cooling efficiency is high, dust generation and diffusion are reduced, and the environmental protection property is good.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder processing, in particular to a powder processing cooling device. Background Art

[0002] Metal powder preparation is generally to force molten metal through a nozzle in a chamber under a controlled atmosphere and be hit by a jet of gas, which atomizes the molten metal into fine metal droplets. The metal droplets solidify into fine particles, which fall at the bottom of the chamber and accumulate there until the molten metal has been completely atomized. At this time, the temperature of the metal powder particles is very high and needs to be cooled to avoid being oxidized by oxygen in the air. The Chinese invention patent application with the prior art publication number CN117337219A proposes a method for cooling and transporting metal powders, and the invention also proposes a cooling device, including a chamber, a conveyor, the conveyor is connected to the chamber of the atomizer and includes a lower pipe for gas circulation, an upper pipe for powder material circulation, a porous wall that separates the lower pipe and the upper pipe substantially over the entire length of the lower pipe and the upper pipe, a fluidizing gas inlet positioned on the lower pipe, and a flow regulator, the flow regulator is connected to the fluidizing gas inlet, for fluidizing, cooling and transporting the metal particles to be discharged from the chamber.

[0003] However, the above cooling method and equipment mainly rely on heat exchange between metal powder particles and gas to cool down, and the specific heat capacity of gas is small, so a large amount of gas is consumed during cooling, resulting in low cooling efficiency. In addition, when a fluidized bed is used to transport metal powder, a large amount of tiny metal powder is blown up by the rising airflow, which will produce a large amount of metal dust. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a powder processing cooling device which can perform multi-stage cooling of metal powder during transportation, has high cooling efficiency, reduces dust generation and diffusion, and has good environmental protection.

[0005] A powder processing cooling device of the present invention comprises a cooling box and a feed hopper, wherein a cooling chamber is arranged inside the cooling box, the feed hopper is mounted on the cooling box, and the output end of the feed hopper extends into the cooling chamber of the cooling box; the device also comprises an evaporative cooling mechanism, a coil cooling mechanism, a blower, an exhaust pipe and a material receiving mechanism, the cooling chamber of the cooling box is filled with a coolant, the evaporative cooling mechanism is mounted in the cooling chamber of the cooling box, the output end of the feed hopper is connected to the input end of the evaporative cooling mechanism, the evaporative cooling mechanism uses coolant droplets to perform primary cooling of the metal powder transported by the feed hopper, the output end of the evaporative cooling mechanism is connected to the input end of the coil cooling mechanism, and the coil The cooling mechanism is immersed in the coolant, the air outlet pipe of the blower is connected to the input end of the coil cooling mechanism, the blower blows air to the coil cooling mechanism to transport the metal powder in the coil cooling mechanism, and the metal powder is subjected to secondary cooling through heat exchange between the coil cooling mechanism and the coolant during transportation. The input end of the exhaust pipe is connected to the output end of the coil cooling mechanism, and the output end of the exhaust pipe extends upward to the outside of the cooling box. The exhaust pipe is used to discharge the gas blown in by the blower, and the output end of the coil cooling mechanism is connected to the receiving mechanism, which is used to receive the cooled metal powder; the coolant is a liquid at room temperature, volatile, and low-viscosity liquid, which evaporates during operation. The interior of the cooling mechanism is filled with coolant droplets, and the blower blows gas into the coil cooling mechanism, so that the gas flows from the input end of the coil cooling mechanism to the output end at high speed and is discharged from the cooling box through the exhaust pipe. The discharge mechanism of the metal powder atomizer (not shown in the figure) inputs the metal powder into the feed hopper through the output pipe, and the feed hopper inputs the metal powder into the evaporative cooling mechanism. The metal powder contacts the coolant droplets, and the coolant droplets are heated and vaporized, thereby taking away a large amount of heat from the metal powder, and the metal powder is cooled at the first level. The metal powder that has been cooled at the first level is input into the coil cooling mechanism, and the metal powder is blown by the airflow, so that the metal powder It is transported along the coil cooling mechanism to the material receiving mechanism for collection. During the transportation process, the heat of the metal powder is transferred to the coolant through the coil cooling mechanism, thereby causing the metal powder to be cooled in the second stage. At the same time, when the gas is blown through the metal powder, the heat of the metal powder is taken away by the gas for third stage cooling, and the coolant remaining in the metal powder is dried during the blowing process. Compared with the existing technology, multi-stage cooling is performed during the metal powder transportation process, and the cooling efficiency is high. The metal powder first contacts with the cooling liquid droplets. During the transportation process, the metal powder has a certain humidity, which reduces dust generation. The metal powder is transported in a sealed pipeline, and the dust will not spread, which is environmentally friendly.

[0006] Preferably, it also includes a cooler, a liquid inlet pipe and a liquid outlet pipe, the cooler is located outside the cooling box, the input end of the liquid inlet pipe extends into the cooling chamber of the cooling box, the output end of the liquid inlet pipe is connected to the inlet of the cooler, the input end of the liquid outlet pipe is connected to the outlet of the cooler, and the output end of the liquid outlet pipe extends into the cooling chamber of the cooling box; the coolant in the cooling chamber of the cooling box is input into the cooler through the liquid inlet pipe, so that the coolant is cooled, and the cooled coolant flows back to the cooling chamber of the cooling box through the liquid outlet pipe, so as to keep the coolant in the cooling box at a low temperature and improve the cooling effect.

[0007] Preferably, the evaporative cooling mechanism comprises an atomizing box, a spray plate, a liquid feeding pipe fitting and a steam pipe, the atomizing box is installed in the cooling chamber of the cooling box, a cooling mist chamber is arranged inside the atomizing box, the output end of the feed hopper extends into the upper part of the cooling mist chamber of the atomizing box, the input end of the coil cooling mechanism is connected to the bottom of the cooling mist chamber of the atomizing box, the spray plate is installed in the cooling mist chamber of the atomizing box, a plurality of atomizing heads are arranged on the spray plate, the input end of the liquid feeding pipe fitting extends into the bottom of the cooling chamber of the cooling box, the output end of the liquid feeding pipe fitting is connected to the spray plate, the input end of the steam pipe is connected to the top of the cooling mist chamber of the atomizing box, and the output end of the steam pipe is connected to the cooler The inlet is connected; the liquid delivery pipe conveys the coolant in the cooling box to the spray plate, and the spray plate atomizes the coolant and sprays it out, so that the cooling mist chamber in the atomization box is filled with coolant droplets, and the metal powder conveyed by the feed hopper is input into the cooling mist chamber of the atomization box, and the metal powder contacts with the coolant droplets. Since the droplet particles are very small, the coolant droplets are instantly vaporized when the coolant droplets collide with the metal particles, thereby absorbing a large amount of heat, and the vaporized coolant is input into the cooler through the steam pipe, and then refluxes to the cooling chamber of the cooling box through the liquid outlet pipe after cooling and liquefaction, thereby realizing the first-level cooling and cooling of the metal powder by the coolant droplets, which has good practicality.

[0008] Preferably, it also includes a reflux channel, the spray plate is located in the middle of the cooling mist chamber of the atomizer box, and a reflux channel is arranged between the side of the spray plate facing away from the atomizer head and the inner wall of the atomizer box, and the two ends of the reflux channel are respectively connected to the output end of the feed hopper and the input end of the coil cooling mechanism; the metal powder output by the feed hopper flows through the space between the atomizer head side of the spray plate and the inner wall of the atomizer box, driving the coolant droplets in the atomizer box to flow, and since the air pressure at the output end of the reflux channel close to the feed hopper is lower, the coolant droplets at the input end of the reflux channel close to the coil cooling mechanism are sucked into the reflux channel and flow to the other end, thereby realizing the circulation of the coolant droplets, improving the utilization rate of the coolant droplets, and reducing the coolant droplets entering the coil cooling mechanism, thereby improving the cooling effect.

[0009] Preferably, it also includes a magnet, which is installed on the inner wall of the atomization box on the side of the atomization head facing the spray plate; the magnetic force of the magnet attracts the metal powder flow passing over the spray plate, causing the parabola of the metal powder to shift upward, thereby extending the contact path and time between the metal powder and the coolant droplets, and improving the primary cooling effect.

[0010] Preferably, the coil cooling mechanism includes an adapter, a coil and a separation tube, the input end of the adapter is connected to the bottom of the cooling mist chamber of the atomizer box, the air outlet pipe of the blower is connected to the adapter, the output end of the adapter is connected to the input end of the coil, the coil is in the shape of a spiral tube, the coil is immersed in the coolant, the output end of the coil is connected to the input end of the separation tube, the separation tube is arc-shaped, the output end of the separation tube is higher than its input end, the output end of the separation tube is connected to the collecting mechanism, the input end of the exhaust pipe is connected to the separation tube and aligned with the output end of the coil; the blower blows gas into the adapter through the air outlet pipe, the gas is input into the separation tube along the coil and discharged through the exhaust pipe, and the metal powder output by the atomizer box is discharged through the exhaust pipe. The metal powder is input into the coil through the adapter and flows along the coil under the blowing of gas. The gas performs tertiary cooling on the metal powder and dries the residual coolant. The metal powder exchanges heat with the coolant to cool down when flowing along the coil. The spiral coil increases the secondary cooling time. At the same time, the metal powder is gradually stratified during the spiral conveying process. Metal powders of different particle levels are in different layers. After the metal powder enters the separation tube, the gas is discharged through the exhaust pipe. The gas is separated from the metal powder, so that the kinetic energy of the metal powder is converted into gravitational potential energy. The metal powders of different layers are thrown out along the separation tube and collected at different positions of the receiving mechanism to achieve the metal powder grading effect.

[0011] Preferably, the inner diameter of the coil gradually decreases from the input end to the output end, the coil is tapered as a whole, the spiral diameter of the coil gradually increases from one end to the other, and the inner diameter of the separation tube is larger than the inner diameter of the output end of the coil; the inner diameter of the coil gradually decreases, so that the gas flow rate increases, and the flow rate of the metal powder is accelerated to achieve a long-distance blowing effect. The coil is tapered, and the direction of the tip of the coil 18 is adjusted as needed to achieve a better stratification effect of particles of different sizes in the metal powder.

[0012] Preferably, the material collecting mechanism includes a collecting box and a powder box, the collecting box is installed in the cooling chamber of the cooling box, a collecting chamber is arranged inside the collecting box, the collecting box opening is connected with the collecting chamber, the opening of the collecting box is located outside the cooling box, the output end of the separation tube is connected with the upper part of the collecting chamber of the collecting box, the powder box is inserted in the collecting chamber of the collecting box through the opening, a plurality of collecting grids are arranged in parallel in the powder box, and the distances between the plurality of collecting grids and the output end of the separation tube gradually increase; the metal powder thrown out through the separation tube enters the collecting chamber of the collecting box, and the metal powders of different layers fall into different collecting grids of the powder box respectively, the powder box is taken out through the opening of the collecting box to collect the graded metal powders separately, the structure is simple and the practicability is good.

[0013] Preferably, it also includes a recovery pipe, a recovery box and a recovery bucket. An expansion zone is arranged on the exhaust pipe, and the expansion zone is located above the cooling box and between the cooler. The inner diameter of the expansion zone is larger than the inner diameter of other parts of the exhaust pipe. The airflow in the exhaust pipe is decelerated in the expansion zone. The input end of the recovery pipe extends into the expansion zone of the exhaust pipe. The recovery box is installed on the cooling box. A second collecting chamber is arranged inside the recovery box. The output end of the recovery pipe extends into the second collecting chamber of the recovery box. The recovery box is located below the input end of the recovery pipe. The recovery bucket is detachably installed in the second collecting chamber of the recovery box. When the gas in the exhaust pipe enters the expansion zone, the inner diameter of the expansion zone suddenly expands while the gas flow rate remains unchanged, so that the gas is decelerated again in the expansion zone, so that the residual metal fine powder in the gas falls and is input into the recovery bucket in the second collecting chamber of the recovery box along the recovery pipe, thereby reducing the waste of metal powder.

[0014] Preferably, it also includes a gas cylinder assembly, an air supply pipe and an air return pipe. A cooling gas pipeline is arranged in the cooler, and the pipeline is provided with an air inlet and an air outlet. The gas cylinder assembly is installed outside the cooling box, and the gas cylinder assembly is provided with an output valve body. The input end of the air supply pipe is connected with the output valve body of the gas cylinder assembly, and the output end of the air supply pipe extends into the air outlet pipe of the blower, the output end of the exhaust pipe is connected with the air inlet of the pipeline of the cooler, the input end of the return pipe is connected with the air outlet of the pipeline of the cooler, and the output end of the return pipe is connected with the second air inlet of the blower; the output valve body of the gas cylinder assembly is opened to input nitrogen or other inert gas into the air outlet pipe of the blower through the air supply pipe, and when the blower blows, the gas is closed and circulated in the adapter, coil, separation pipe, exhaust pipe, cooler, return pipe and blower, so as to reduce the oxygen content in the gas, thereby reducing the oxidation of the metal powder, and the gas is cooled when passing through the cooling gas pipeline of the cooler, thereby improving the cooling effect of the three-stage cooling of the metal powder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: multi-stage cooling is performed during the metal powder conveying process, the cooling efficiency is high, the metal powder first contacts with the cooling liquid droplets, the metal powder has a certain humidity during the conveying process, the dust generation is reduced, and the metal powder is conveyed in a sealed pipeline, the dust will not spread, and the environmental protection is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the axonometric structure of the present invention; Figure 4 It is a schematic diagram of the structure of the feed hopper, evaporative cooling mechanism, coil cooling mechanism, blower, exhaust duct, material receiving mechanism and cooler; Figure 5 It is a schematic diagram of the structure of the coil cooling mechanism, blower, exhaust pipe and material receiving mechanism; Figure 6 It is a schematic diagram of the structure of the feed hopper and the evaporative cooling mechanism; Figure 7 It is a partial cross-sectional structural schematic diagram of the evaporative cooling mechanism; Figure 8 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Fig. 9 It is a structural schematic diagram of the separation pipe, recovery pipe, recovery box and recovery bucket; Fig.10 It is a structural schematic diagram of the blower, gas cylinder assembly, air supply pipe and air return pipe.

[0017] Markings in the attached drawings: 1. Cooling box; 2. Feed hopper; 3. Evaporative cooling mechanism; 4. Coil cooling mechanism; 5. Blower; 6. Exhaust duct; 7. Material receiving mechanism; 8. Cooler; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. Atomization box; 12. Spray plate; 13. Liquid delivery pipe; 14. Steam pipe; 15. Reflux channel; 16. Magnet; 17. Adapter; 18. Coil; 19. Separation tube; 20. Collecting box; 21. Powder box; 22. Recovery pipe; 23. Recovery box; 24. Recovery hopper; 25. Gas cylinder assembly; 26. Gas supply pipe; 27. Return air pipe. DETAILED DESCRIPTION

[0018] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] Embodiment 1, as Figures 1 to 5 and Fig.10 As shown, a powder processing cooling device comprises a cooling box 1 and a feed hopper 2, wherein a cooling chamber is arranged inside the cooling box 1, the feed hopper 2 is mounted on the cooling box 1, and the output end of the feed hopper 2 extends into the cooling chamber of the cooling box 1; the device also comprises an evaporative cooling mechanism 3, a coil cooling mechanism 4, a blower 5, an exhaust pipe 6 and a material receiving mechanism 7, the cooling chamber of the cooling box 1 is filled with coolant, the evaporative cooling mechanism 3 is mounted in the cooling chamber of the cooling box 1, the output end of the feed hopper 2 is connected to the input end of the evaporative cooling mechanism 3, the evaporative cooling mechanism 3 uses coolant droplets to perform primary cooling of the metal powder transported by the feed hopper 2, the output end of the evaporative cooling mechanism 3 is connected to the input end of the coil cooling mechanism 4, the coil cooling mechanism 4 is immersed in the coolant, the outlet pipe of the blower 5 is connected to the input end of the coil cooling mechanism 4, and the blower 5 blows coolant to the coil The tube cooling mechanism 4 blows air to transport the metal powder in the coil cooling mechanism 4. During the transportation process, the metal powder undergoes secondary cooling through heat exchange between the coil cooling mechanism 4 and the coolant. The input end of the exhaust pipe 6 is connected to the output end of the coil cooling mechanism 4, and the output end of the exhaust pipe 6 extends upward to the outside of the cooling box 1. The exhaust pipe 6 is used to discharge the gas blown in by the blower 5. The output end of the coil cooling mechanism 4 is connected to the receiving mechanism 7, and the receiving mechanism 7 is used to receive the cooled metal powder. It also includes a cooler 8, a liquid inlet pipe 9 and a liquid outlet pipe 10. The cooler 8 is located outside the cooling box 1, the input end of the liquid inlet pipe 9 extends into the cooling chamber of the cooling box 1, the output end of the liquid inlet pipe 9 is connected to the inlet of the cooler 8, the input end of the liquid outlet pipe 10 is connected to the outlet of the cooler 8, and the output end of the liquid outlet pipe 10 extends into the cooling chamber of the cooling box 1.

[0020] The coolant is a liquid that is liquid at room temperature, volatile, and has low viscosity. When working, the interior of the evaporative cooling mechanism 3 is filled with coolant droplets, and the blower 5 blows gas into the coil cooling mechanism 4, so that the gas flows from the input end of the coil cooling mechanism 4 to the output end at high speed and is discharged from the cooling box 1 through the exhaust pipe 6. The metal powder atomizer inputs the metal powder into the evaporative cooling mechanism 3, and the metal powder contacts with the coolant droplets. The coolant droplets are heated and vaporized, thereby taking away a large amount of heat from the metal powder, and the metal powder is first-stage cooled. The metal powder that has been first-stage cooled is input into the coil cooling mechanism 4, and the metal powder is blown by the airflow, so that the metal powder is transported along the coil cooling mechanism 4 to the collecting mechanism 7 for collection. During the transportation process, the heat of the metal powder passes through the coil cooling mechanism 4 is transferred to the coolant, thereby causing the metal powder to be cooled in the second stage. At the same time, when the gas blows the metal powder, the heat of the metal powder is taken away by the gas for the third stage cooling, and the coolant remaining in the metal powder is blown dry during the blowing process. Compared with the prior art, multi-stage cooling is performed during the metal powder transportation process, and the cooling efficiency is high. The metal powder first contacts with the coolant droplets. During the transportation process, the metal powder has a certain humidity, which reduces the generation of dust. Moreover, the metal powder is transported in a sealed pipeline, and the dust will not spread, which has good environmental protection. The coolant in the cooling chamber of the cooling box 1 is input into the cooler 8 through the liquid inlet pipe 9, so that the coolant is cooled and cooled. The cooled and cooled coolant flows back to the cooling chamber of the cooling box 1 through the liquid outlet pipe 10, so as to keep the coolant in the cooling box 1 at a low temperature and improve the cooling effect.

[0021] It also includes a gas cylinder assembly 25, an air supply pipe 26 and a return air pipe 27. A gas cooling unit is arranged on the upper part of the cooler 8. A pipeline for cooling gas is arranged in the gas cooling unit, and an air inlet and an air outlet are arranged on the pipeline. The air inlet and the air outlet are both located outside the cooler 8. The air inlet and the air outlet are used to connect with an external pipeline. The gas cylinder assembly 25 is installed outside the cooling box 1. The gas cylinder assembly 25 is provided with an output valve body. The input end of the air supply pipe 26 is connected to the output valve body of the gas cylinder assembly 25. The output end of the air supply pipe 26 extends into the outlet pipe of the blower 5. The output end of the exhaust pipe 6 is connected to the air inlet of the pipeline of the cooler 8. The input end of the return air pipe 27 is connected to the air outlet of the pipeline of the cooler 8. The output end of the return air pipe 27 is connected to the second air inlet of the blower 5. The airflow transported by the exhaust pipe 6 enters the pipeline of the cooler 8 through the air inlet, so that the airflow is cooled. The cooled airflow enters the return air pipe 27 through the air outlet and returns to the blower 5 through the second air inlet.

[0022] The output valve body of the gas cylinder assembly 25 is opened to input inert gas such as nitrogen into the outlet pipe of the blower 5 through the air supply pipe 26. When the blower 5 blows, the gas is closed and circulated in the adapter 17, the coil 18, the separation pipe 19, the exhaust pipe 6, the cooler 8, the return pipe 27 and the blower 5, thereby reducing the oxygen content in the gas, thereby reducing the oxidation of the metal powder, and the gas is cooled when passing through the cooling gas pipeline of the cooler 8, thereby improving the cooling effect of the three-stage cooling of the metal powder.

[0023] Embodiment 2, as Figures 6 to 8 As shown, on the basis of Example 1, the evaporative cooling mechanism 3 includes an atomizing box 11, a spray plate 12, a liquid feeding pipe 13 and a steam pipe 14, the atomizing box 11 is installed in the cooling chamber of the cooling box 1, a cooling mist chamber is arranged inside the atomizing box 11, the output end of the feed hopper 2 extends into the upper part of the cooling mist chamber of the atomizing box 11, the input end of the coil cooling mechanism 4 is connected to the bottom of the cooling mist chamber of the atomizing box 11, the spray plate 12 is installed in the cooling mist chamber of the atomizing box 11, the spray plate 12 is provided with a plurality of atomizing heads, the input end of the liquid feeding pipe 13 extends into the bottom of the cooling chamber of the cooling box 1, and the liquid feeding pipe 14 is connected to the bottom of the cooling chamber of the cooling box 1. The output end of the steam pipe 14 is connected to the spray plate 12, the input end of the steam pipe 14 is connected to the top of the cooling mist chamber of the atomizing box 11, and the output end of the steam pipe 14 is connected to the inlet of the cooler 8; it also includes a reflux channel 15, the spray plate 12 is located in the middle of the cooling mist chamber of the atomizing box 11, and the reflux channel 15 is set between the side of the spray plate 12 facing away from the atomizing head and the inner wall of the atomizing box 11, and the two ends of the reflux channel 15 are respectively connected to the output end of the feed hopper 2 and the input end of the coil cooling mechanism 4; it also includes a magnet 16, which is installed on the inner wall of the atomizing box 11 on the side of the atomizing head facing the spray plate 12.

[0024] The liquid delivery pipe 13 conveys the coolant in the cooling box 1 to the spray plate 12, and the spray plate 12 atomizes the coolant and sprays it out, so that the cooling mist chamber in the atomizing box 11 is filled with coolant droplets. The metal powder conveyed by the feed hopper 2 is input into the cooling mist chamber of the atomizing box 11, and the metal powder contacts with the coolant droplets. Since the droplet particles are very small, the coolant droplets are instantly vaporized when the coolant droplets collide with the metal particles, thereby absorbing a large amount of heat. The vaporized coolant is input into the cooler 8 through the steam pipe 14, and after cooling and liquefaction, it flows back to the cooling chamber of the cooling box 1 through the liquid outlet pipe 10, thereby realizing the first-level cooling of the metal powder by the coolant droplets, which has good practicality.

[0025] The metal powder output from the feed hopper 2 flows through the space between one side of the atomizing head of the spray plate 12 and the inner wall of the atomizing box 11, driving the coolant droplets in the atomizing box 11 to flow. Since the air pressure at the output end of the reflux channel 15 close to the feed hopper 2 is lower, the coolant droplets at the input end of the reflux channel 15 close to the coil cooling mechanism 4 are sucked into the reflux channel 15 and flow to the other end, thereby realizing the circulation of the coolant droplets, improving the utilization rate of the coolant droplets, and reducing the coolant droplets entering the coil cooling mechanism 4, thereby improving the cooling effect. The magnetic force of the magnet 16 attracts the metal powder flow passing above the spray plate 12, causing the parabola of the metal powder to deviate upward, thereby extending the contact path and time between the metal powder and the coolant droplets, and improving the primary cooling effect.

[0026] Embodiment 3, as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Fig. 9As shown, on the basis of Example 1, the coil cooling mechanism 4 includes an adapter 17, a coil 18 and a separation tube 19, the input end of the adapter 17 is connected to the bottom of the cooling mist chamber of the atomizing box 11, the air outlet pipe of the blower 5 is connected to the adapter 17, the output end of the adapter 17 is connected to the input end of the coil 18, the coil 18 is a spiral tube, the coil 18 is immersed in the coolant, the output end of the coil 18 is connected to the input end of the separation tube 19, the separation tube 19 is arc-shaped, and the output end of the separation tube 19 is higher than Its input end and the output end of the separation tube 19 are connected to the material receiving mechanism 7, and the input end of the exhaust pipe 6 is connected to the separation tube 19 and aligned with the output end of the coil 18; the inner diameter of the coil 18 gradually decreases from the input end to the output end, and the coil 18 is tapered as a whole. The spiral diameter of the coil 18 gradually increases from one end to the other end, and the inner diameter of the separation tube 19 is larger than the inner diameter of the output end of the coil 18; the material receiving mechanism 7 includes a collecting box 20 and a powder box 21. The collecting box 20 is installed in the cooling chamber of the cooling box 1, and the collecting box 21 is installed in the cooling chamber of the cooling box 1. 0 is provided with a collecting chamber inside, the opening of the collecting box 20 is communicated with the collecting chamber, the opening of the collecting box 20 is located outside the cooling box 1, the output end of the separation tube 19 is communicated with the upper part of the collecting chamber of the collecting box 20, the powder box 21 is inserted into the collecting chamber of the collecting box 20 through the opening, the powder box 21 is provided with a plurality of collecting grids in parallel, and the distances between the plurality of collecting grids and the output end of the separation tube 19 gradually increase; it also includes a recovery pipe 22, a recovery box 23 and a recovery bucket 24, an expansion zone is provided on the exhaust pipe 6, and the expansion zone is located Between the cooling box 1 and the cooler 8, the inner diameter of the expansion zone is larger than the inner diameter of other parts of the exhaust pipe 6. The airflow in the exhaust pipe 6 slows down in the expansion zone. The input end of the recovery pipe 22 extends into the expansion zone of the exhaust pipe 6. The recovery box 23 is installed on the cooling box 1. A collection chamber 2 is arranged inside the recovery box 23. The output end of the recovery pipe 22 extends into the collection chamber 2 of the recovery box 23. The recovery box 23 is located below the input end of the recovery pipe 22. The recovery bucket 24 is detachably installed in the collection chamber 2 of the recovery box 23.

[0027] The blower 5 blows gas into the adapter 17 through the air outlet pipe, and the gas is input into the separation pipe 19 along the coil 18 and discharged through the exhaust pipe 6. The metal powder output by the atomizer 11 is input into the coil 18 through the adapter 17 and flows along the coil 18 under the blowing of the gas. The gas performs three-stage cooling on the metal powder and dries the residual coolant. When the metal powder flows along the coil 18, it exchanges heat with the coolant for cooling. The spiral coil 18 increases the secondary cooling time. At the same time, the metal powder is gradually layered during the spiral conveying process, and metal powders of different particle levels are They are respectively at different layers. After the metal powder enters the separation tube 19, the gas is discharged through the exhaust pipe 6. The gas is separated from the metal powder, so that the kinetic energy of the metal powder is converted into gravitational potential energy. The metal powders of different layers are thrown along the separation tube 19 and collected at different positions of the receiving mechanism 7, so as to achieve the metal powder classification effect. The inner diameter of the coil 18 is gradually reduced to increase the gas flow rate, so that the flow rate of the metal powder is accelerated, and the long-distance blowing effect is achieved. The coil 18 is set in a conical shape. The tip direction of the coil 18 is adjusted according to the needs, so that the stratification effect of particles of different sizes in the metal powder is better. The metal powder thrown out through the separation tube 19 enters the collection chamber of the collection box 20, and the metal powders of different layers fall into different collection grids of the powder box 21 respectively. The powder box 21 is taken out through the opening of the collection box 20 to collect the graded metal powders separately. When the gas in the exhaust pipe 6 enters the expansion zone, the inner diameter of the expansion zone suddenly expands while the gas flow rate remains unchanged, so that the gas decelerates again in the expansion zone, so that the residual metal fine powder in the gas falls and is input into the recovery bucket 24 in the collection chamber 2 of the recovery box 23 along the recovery pipe 22, thereby reducing the waste of metal powder.

[0028] Note: In the above embodiments 1, 2 and 3 and the accompanying drawings, the coil 18 is placed horizontally and the tapered tip is set on the input end side. In other embodiments, the coil 18 can also be arranged vertically and the tapered tip is set on the output end side, so as to achieve different cooling and powder classification effects.

[0029] like Figures 1 to 10As shown, a powder processing cooling device of the present invention, when it is working, first the liquid delivery pipe 13 delivers the coolant in the cooling box 1 to the spray plate 12, the spray plate 12 atomizes the coolant and sprays it out, so that the cooling mist chamber in the atomizing box 11 is filled with coolant droplets, and then the metal powder delivered by the feed hopper 2 is input into the cooling mist chamber of the atomizing box 11, and the metal powder contacts with the coolant droplets. Since the droplet particles are very small, the coolant droplets are instantly vaporized when the coolant droplets collide with the metal particles, thereby absorbing a large amount of heat, and the metal powder is first-stage cooled, and then the metal powder that has been first-stage cooled is input into the coil 18 through the adapter 17, and the metal powder is blown by the airflow to make The metal powder is transported to the collecting box 20 along the coil 18 and the separation tube 19. During the transportation process, the heat of the metal powder is transferred to the coolant through the coil cooling mechanism 4, so that the metal powder is cooled in the second stage. At the same time, when the gas blows the metal powder, the heat of the metal powder is taken away by the gas for tertiary cooling, and the coolant remaining in the metal powder is dried during the blowing process. Finally, the metal powder thrown out through the separation tube 19 enters the collecting chamber of the collecting box 20, and the metal powders of different layers fall into different collecting grids of the powder box 21 respectively. The powder box 21 is taken out through the opening of the collecting box 20 to collect the graded metal powders separately.

[0030] The main functions achieved by the present invention are: 1. The metal powder is cooled in multiple stages during transportation, with high cooling efficiency; 2. The metal powder first contacts with the cooling liquid droplets. During the transportation process, the metal powder has a certain humidity, which reduces the generation of dust. In addition, the metal powder is transported in a closed pipeline, so the dust will not spread, which is environmentally friendly. 3. The metal powder is classified and collected separately during the cooling and conveying process; 4. Use inert gas to blow metal powder to avoid oxidation of metal powder, and dry the residual coolant while cooling to improve the quality of metal powder.

[0031] The installation method, connection method or setting method of the powder processing cooling equipment of the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the cooling box 1, feed hopper 2, blower 5, exhaust pipe 6, cooler 8, spray plate 12, liquid delivery pipe 13, magnet 16, coil 18, separation tube 19, and gas cylinder assembly 25 of the powder processing cooling equipment of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A powder processing cooling device, comprising a cooling box (1) and a feed hopper (2), wherein a cooling chamber is arranged inside the cooling box (1), the feed hopper (2) is mounted on the cooling box (1), and an output end of the feed hopper (2) extends into the cooling chamber of the cooling box (1); characterized in that: The cooling device also comprises an evaporative cooling mechanism (3), a coil cooling mechanism (4), a blower (5), an exhaust pipe (6) and a material receiving mechanism (7). The cooling chamber of the cooling box (1) is filled with coolant. The evaporative cooling mechanism (3) is installed in the cooling chamber of the cooling box (1). The output end of the feed hopper (2) is connected to the input end of the evaporative cooling mechanism (3). The evaporative cooling mechanism (3) uses coolant droplets to perform primary cooling of the metal powder transported by the feed hopper (2). The output end of the evaporative cooling mechanism (3) is connected to the input end of the coil cooling mechanism (4). The coil cooling mechanism (4) is immersed in the coolant. The output end of the blower (5) is connected to the input end of the coil cooling mechanism (4). The air duct is connected to the input end of the coil cooling mechanism (4), the blower (5) blows air to the coil cooling mechanism (4) so ​​that the metal powder is transported in the coil cooling mechanism (4), and the metal powder is subjected to secondary cooling through heat exchange with the coolant through the coil cooling mechanism (4) during the transportation process. The input end of the exhaust duct (6) is connected to the output end of the coil cooling mechanism (4), the output end of the exhaust duct (6) extends upward to the outside of the cooling box (1), and the exhaust duct (6) is used to discharge the gas blown in by the blower (5). The output end of the coil cooling mechanism (4) is connected to the receiving mechanism (7), and the receiving mechanism (7) is used to receive the cooled metal powder.

2. A powder processing cooling device as claimed in claim 1, characterized in that: It also includes a cooler (8), a liquid inlet pipe (9) and a liquid outlet pipe (10), wherein the cooler (8) is located outside the cooling box (1), the input end of the liquid inlet pipe (9) extends into the cooling chamber of the cooling box (1), the output end of the liquid inlet pipe (9) is connected to the inlet of the cooler (8), the input end of the liquid outlet pipe (10) is connected to the outlet of the cooler (8), and the output end of the liquid outlet pipe (10) extends into the cooling chamber of the cooling box (1).

3. A powder processing cooling device as claimed in claim 2, characterized in that: The evaporative cooling mechanism (3) comprises an atomizing box (11), a spray plate (12), a liquid feeding pipe (13) and a steam pipe (14). The atomizing box (11) is installed in the cooling chamber of the cooling box (1). A cooling mist chamber is arranged inside the atomizing box (11). The output end of the feed hopper (2) extends into the upper part of the cooling mist chamber of the atomizing box (11). The input end of the coil cooling mechanism (4) is connected to the bottom of the cooling mist chamber of the atomizing box (11). The spray plate (12) is installed in the cooling mist chamber of the atomizing box (11). The spray plate (12) is provided with a plurality of atomizing heads. The input end of the liquid feeding pipe (13) extends into the bottom of the cooling chamber of the cooling box (1). The output end of the liquid feeding pipe (13) is connected to the spray plate (12). The input end of the steam pipe (14) is connected to the top of the cooling mist chamber of the atomizing box (11). The output end of the steam pipe (14) is connected to the inlet of the cooler (8).

4. A powder processing cooling device as claimed in claim 3, characterized in that: The invention also comprises a reflux channel (15). The spray plate (12) is located in the middle of the cooling mist chamber of the atomizing box (11). The reflux channel (15) is arranged between the side of the spray plate (12) facing away from the atomizing head and the inner wall of the atomizing box (11). The two ends of the reflux channel (15) are respectively connected to the output end of the feed hopper (2) and the input end of the coil cooling mechanism (4).

5. A powder processing cooling device as claimed in claim 3, characterized in that: It also includes a magnet (16), which is mounted on the inner wall of the atomization box (11) on the side of the atomization head facing the spray plate (12).

6. A powder processing cooling device as claimed in claim 2, characterized in that: The coil cooling mechanism (4) comprises an adapter (17), a coil (18) and a separation tube (19); the input end of the adapter (17) is connected to the bottom of the cooling mist chamber of the atomizing box (11); the air outlet pipe of the blower (5) is connected to the adapter (17); the output end of the adapter (17) is connected to the input end of the coil (18); the coil (18) is in the shape of a spiral tube; the coil (18) is immersed in a cooling liquid; the output end of the coil (18) is connected to the input end of the separation tube (19); the separation tube (19) is in the shape of an arc; the output end of the separation tube (19) is higher than the input end; the output end of the separation tube (19) is connected to the material receiving mechanism (7); the input end of the exhaust pipe (6) is connected to the separation tube (19) and is aligned with the output end of the coil (18).

7. A powder processing cooling device as claimed in claim 6, characterized in that: The inner diameter of the coil (18) gradually decreases from the input end to the output end. The coil (18) is tapered as a whole. The spiral diameter of the coil (18) gradually increases from one end to the other end. The inner diameter of the separation tube (19) is larger than the inner diameter of the output end of the coil (18).

8. A powder processing cooling device as claimed in claim 6, characterized in that: The material collecting mechanism (7) comprises a collecting box (20) and a powder box (21); the collecting box (20) is installed in the cooling chamber of the cooling box (1); a collecting chamber is arranged inside the collecting box (20); an opening of the collecting box (20) is communicated with the collecting chamber; the opening of the collecting box (20) is located outside the cooling box (1); an output end of the separation tube (19) is communicated with an upper portion of the collecting chamber of the collecting box (20); the powder box (21) is inserted into the collecting chamber of the collecting box (20) through the opening; a plurality of collecting grids are arranged in parallel on the powder box (21); and the plurality of collecting grids are gradually increased in distance from the output end of the separation tube (19).

9. A powder processing cooling device as claimed in claim 8, characterized in that: The invention also comprises a recovery pipe (22), a recovery box (23) and a recovery bucket (24); an expansion zone is arranged on the exhaust pipe (6); the expansion zone is located between the cooling box (1) and the cooler (8); the inner diameter of the expansion zone is larger than the inner diameter of other parts of the exhaust pipe (6); the airflow in the exhaust pipe (6) is decelerated in the expansion zone; the input end of the recovery pipe (22) extends into the expansion zone of the exhaust pipe (6); the recovery box (23) is installed on the cooling box (1); a second collecting chamber is arranged inside the recovery box (23); the output end of the recovery pipe (22) extends into the second collecting chamber of the recovery box (23); the recovery box (23) is located below the input end of the recovery pipe (22); and the recovery bucket (24) is detachably installed in the second collecting chamber of the recovery box (23).

10. The powder processing cooling equipment according to claim 2, characterized in that: The cooling box (1) further comprises a gas cylinder assembly (25), a gas supply pipe (26) and a gas return pipe (27). A cooling gas pipeline is arranged in the cooler (8), and the pipeline is provided with an air inlet and an air outlet. The air inlet and the air outlet are both located outside the cooler (8). The air inlet and the air outlet are used to connect with an external pipeline. The gas cylinder assembly (25) is installed outside the cooling box (1). The gas cylinder assembly (25) is provided with an output valve body. The input end of the gas supply pipe (26) is connected to the output valve body of the gas cylinder assembly (25). The output end of the gas supply pipe (26) is connected to the output valve body of the gas cylinder assembly (25). The outlet end extends into the outlet pipe of the blower (5), the output end of the exhaust pipe (6) is connected to the air inlet of the pipeline of the cooler (8), the input end of the return pipe (27) is connected to the air outlet of the pipeline of the cooler (8), the output end of the return pipe (27) is connected to the second air inlet of the blower (5), the airflow transported by the exhaust pipe (6) enters the pipeline of the cooler (8) through the air inlet, so that the airflow is cooled, and the cooled airflow enters the return pipe (27) through the air outlet and returns to the blower (5) through the second air inlet.

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