Powder size grading device
By designing a powder particle size grading device, the grading tank and multi-layer filter structure combined with wind and gravity, multiple particle size grading of metal powder is achieved, solving the problems of complex operation and inefficiency in the prior art, and significantly improving the grading efficiency and effect.
Patent Information
- Application Number
- CN202421312829.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing metal powder particle size grading methods are complex in operation and inefficient, and cannot effectively realize multiple particle size grading.
A powder particle size grading device is designed, using a grading tank and a multi-layer filter structure, combining the wind force blown by the jet head and the gravity of the powder to achieve preliminary, secondary and tertiary grading of the powder.
Through multiple grading, the efficiency and effect of powder particle size grading are significantly improved and the operation process is simplified.
Smart Images
Figure CN222766732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of powder particle size classification, in particular to a powder particle size classification device. Background Art
[0002] Particle size refers to the relative content of particles of various sizes in a powder, such as particle size distribution and the cumulative percentage of various particle sizes. It is a measure of the size of minerals or particles that make up ore, rock, and soil.
[0003] In the production process of metal powder, in order to obtain more powder particle size products or finer powder particle size products, the metal powder needs to be graded. The existing metal powder particle grading is generally carried out by two or more aggregate tanks. The aggregate tanks at each level are connected by a powder conveying pipeline and an air knife conveying valve. After opening the air knife conveying valve, the metal powder in the upper aggregate tank will be conveyed to the lower aggregate tank. The operation is complicated and the powder particle size grading efficiency is low. Utility Model Content
[0004] In view of the above problems, the purpose of the utility model is to provide a powder particle size classification device, which solves the problem that the aggregate tanks at each level are connected through a powder conveying pipeline and an air knife type conveying valve. After the air knife type conveying valve is opened, the metal powder in the upper aggregate tank will be conveyed to the lower aggregate tank. The operation is complicated and the powder particle size classification efficiency is low. After the powder enters the classification tank, it sinks under the action of the wind blown out by the jet head and its own gravity. The sinking powder encounters the filter screen inside the classification top plate, which is larger than the filter screen hole inside the classification top plate. Powders with a diameter larger than 0.01mm are retained on the grading top plate, achieving preliminary classification of powder particle size. Then the powder that continues to sink encounters the filter screen inside the grading middle plate. Powders with a hole diameter larger than the filter screen inside the grading middle plate are retained on the grading middle plate, achieving secondary classification of powder particle size. Then the powder that continues to sink encounters the filter screen inside the grading bottom plate. Powders with a hole diameter larger than the filter screen inside the grading bottom plate are retained on the grading bottom plate, achieving tertiary classification of powder particle size. Then the powder is graded three times to ensure the effect of particle size grading.
[0005] To achieve the above objectives, the utility model adopts the following technical solution: a powder particle size classification device, comprising a tank assembly, a blowing assembly, and a classification assembly, the tank assembly comprising a classification tank, the top of the classification tank is connected with a feed hopper, the lower end of the classification tank is connected with a discharge pipe, the blowing assembly comprises a blower, the output end of the blower is connected with an air inlet pipe, the outer wall of the air inlet pipe is connected with a horizontal diverter pipe, the end of the horizontal diverter pipe away from the air inlet pipe is connected with an air supply pipe, the lower end of the air supply pipe is connected with a vertical diverter pipe, the inner wall of the classification tank is connected with a partition, the lower end of the partition is connected with a jet head, the classification assembly comprises a classification top plate, a classification middle plate is arranged below the classification top plate, a classification bottom plate is arranged below the classification middle plate, a filter is connected to the inner side of the classification top plate, the outer wall of the classification tank is connected with a discharge pipe, the inner wall of the classification tank is connected with an electric push rod through a mounting block, and the output end of the electric push rod is connected with a discharge plate.
[0006] The beneficial effects of the utility model are as follows: after the powder enters the grading tank, it sinks under the action of the wind force blown out by the jet head and its own gravity, and the sunken powder encounters the filter screen inside the grading top plate, and the powder larger than the pore size of the filter screen inside the grading top plate is retained on the grading top plate, thereby achieving preliminary grading of the powder particle size, and then the powder that continues to sink encounters the filter screen inside the grading middle plate, and the powder larger than the pore size of the filter screen inside the grading middle plate is retained on the grading middle plate, thereby achieving secondary grading of the powder particle size, and then the powder that continues to sink encounters the filter screen inside the grading bottom plate, and the powder larger than the pore size of the filter screen inside the grading bottom plate is retained on the grading bottom plate, thereby achieving tertiary grading of the powder particle size, and then tertiary grading of the powder particle size is performed, thereby ensuring the effect of particle size grading, and the setting of the support frame is used to fix and support the blower, and the setting of the two blowers is used to ensure the wind force for particle size classification of the powder.
[0007] In order to guide the powder after particle size classification into the discharge pipe and discharge it centrally:
[0008] As a further improvement of the above technical solution: the lower end of the feed hopper passes through the partition and extends to the inner side of the grading tank, the top of the feed hopper is rotatably connected to a top cover through a hinge shaft, the inner wall of the grading tank is connected to a material guide plate, and the discharge pipe is connected to a valve.
[0009] The beneficial effect of this improvement is that when the powder is subjected to particle size classification, the top cover of the feed hopper is opened, and then the powder is added into the classification tank through the feed hopper. The guide plate is set to guide the powder that has completed particle size classification into the discharge pipe and discharge it in a centralized manner.
[0010] To ensure the wind force for particle size classification of powder:
[0011] As a further improvement of the above technical solution: two blowers are provided in total, the two blowers are symmetrically arranged and electrically connected to the operation panel, the two ends of the grading tank are symmetrically connected with support frames, and the blowers are installed on the top of the support frames.
[0012] The beneficial effects of this improvement are: the support frame is provided to fix and support the blower, and the two blowers are provided to ensure the wind force for particle size classification of the powder.
[0013] In order to divert and transport the wind in the intake pipe through the horizontal diverter pipe and the vertical diverter pipe:
[0014] As a further improvement of the above technical solution: the end of the air inlet pipe away from the blower penetrates the wall of the grading tank and extends to be connected with the outer wall of the feed hopper, and the air inlet pipe is connected with the corresponding air supply pipe through a horizontal diversion pipe.
[0015] The beneficial effect of this improvement is that after the blower is started, the blower starts working and transmits the generated wind through the air intake pipe, and then the wind in the air intake pipe is diverted and transported through the horizontal diverter pipe and the vertical diverter pipe.
[0016] In order for the air to be ejected from the nozzle and used to blow the powder:
[0017] As a further improvement of the above technical solution: the lower end of the air intake pipe is connected with a vertical diverter pipe, the vertical diverter pipe is connected with the connected air intake pipe and air delivery pipe, and the lower end of the vertical diverter pipe passes through the partition and extends to be connected with the injection head.
[0018] The beneficial effect of this improvement is that after the wind in the air inlet pipe and the air delivery pipe flows into the vertical diverter pipe, the wind continues to flow in the vertical diverter pipe and flows into the jet head, and then the wind is ejected from the jet head and used to blow the powder.
[0019] In order to achieve the three-stage classification of powder particle size, and then the three-stage classification of powder particle size, to ensure the effect of particle size classification:
[0020] As a further improvement of the above technical solution: both ends of the grading top plate are connected to the inner wall of the grading tank, the inner sides of the grading top plate, the grading middle plate and the grading bottom plate are all connected with filter screens, and the apertures of the filter screens connected to the grading top plate, the grading middle plate and the grading bottom plate decrease successively.
[0021] The beneficial effect of this improvement is as follows: after the powder enters the grading tank, it sinks under the action of the wind blown out by the jet head and its own gravity, and the sinking powder encounters the filter screen inside the grading top plate, and the powder larger than the pore size of the filter screen inside the grading top plate is retained on the grading top plate, thereby achieving preliminary grading of the powder particle size, and then the powder that continues to sink encounters the filter screen inside the grading middle plate, and the powder larger than the pore size of the filter screen inside the grading middle plate is retained on the grading middle plate, thereby achieving secondary grading of the powder particle size, and then the powder that continues to sink encounters the filter screen inside the grading bottom plate, and the powder larger than the pore size of the filter screen inside the grading bottom plate is retained on the grading bottom plate, thereby achieving tertiary grading of the powder particle size, thereby achieving tertiary grading of the powder particle size, and then tertiary particle size grading of the powder is performed to ensure the effect of particle size grading.
[0022] To discharge the powder after particle size classification out of the classification tank:
[0023] As a further improvement of the above technical solution: a total of six discharge pipes are provided, and every two discharge pipes form a group for common use, and the two discharge pipes in the same group are symmetrically arranged, and a through hole groove is provided on the wall of the connection between the grading tank and the discharge pipe.
[0024] The beneficial effect of this improvement is that the discharge pipe is provided to discharge the powder that has completed the particle size classification from the classification tank, and then the powder is discharged from the classification tank through the discharge pipe for collection.
[0025] In order for the electric push rod to retract and drive the discharge plate to move upward:
[0026] As a further improvement of the above technical solution: the electric push rods are symmetrically arranged in a group of two, the electric push rods are electrically connected to the operation panel, the number of the electric push rods is the same as the number of the discharge pipes, and the size of the discharge plate matches the size of the through hole groove opened on the wall of the grading tank.
[0027] The beneficial effect of this improvement is that when the powder that has completed particle size classification needs to be discharged from the classification tank, the electric push rod is started, and then the electric push rod contracts and drives the discharge plate to move upward, and then the powder flows into the discharge pipe from the through-hole groove opened in the wall of the classification tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.
[0029] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.
[0030] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point B in the middle.
[0031] Figure 4It is a structural schematic diagram of the partition of the utility model.
[0032] Figure 5 It is a structural schematic diagram of the grading top plate of the utility model.
[0033] In the figure: 1. tank assembly; 11. grading tank; 12. feed hopper; 13. support frame; 14. guide plate; 15. discharge pipe; 2. blowing assembly; 21. blower; 22. air inlet pipe; 23. air delivery pipe; 24. horizontal diversion pipe; 25. vertical diversion pipe; 26. partition; 27. nozzle; 3. grading assembly; 31. grading top plate; 32. grading middle plate; 33. grading bottom plate; 34. filter screen; 35. discharge pipe; 36. electric push rod; 37. discharge plate. DETAILED DESCRIPTION
[0034] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.
[0035] like Figure 1-5As shown, a powder particle size classification device comprises a tank assembly 1, a blowing assembly 2, and a classification assembly 3. The tank assembly 1 comprises a classification tank 11, the top of the classification tank 11 is connected to a feed hopper 12, the lower end of the classification tank 11 is connected to a discharge pipe 15, the blowing assembly 2 comprises a blower 21, the output end of the blower 21 is connected to an air inlet pipe 22, the outer wall of the air inlet pipe 22 is connected to a horizontal diverter pipe 24, the end of the horizontal diverter pipe 24 away from the air inlet pipe 22 is connected to an air delivery pipe 23, the lower end of the air delivery pipe 23 is connected to a vertical diverter pipe 25, the inner wall of the classification tank 11 is connected to a partition 26, the lower end of the partition 26 is connected to a nozzle 27, the grading assembly 3 includes a grading top plate 31, a grading middle plate 32 is arranged below the grading top plate 31, a grading bottom plate 33 is arranged below the grading middle plate 32, a filter screen 34 is connected to the inner side of the grading top plate 31, a discharge pipe 35 is connected to the outer wall of the grading tank 11, an electric push rod 36 is connected to the inner wall of the grading tank 11 through a mounting block, and a discharge plate 37 is connected to the output end of the electric push rod 36, the lower end of the feed hopper 12 passes through the partition 26 and extends to the inner side of the grading tank 11, the top of the feed hopper 12 is rotatably connected to a top cover through a hinge shaft, the inner wall of the grading tank 11 is connected to a guide plate 14, and the discharge pipe 15 is connected There is a valve; when the powder is subjected to particle size classification, the top cover of the feed hopper 12 is opened, and then the powder is added into the classification tank 11 through the feed hopper 12, and the guide plate 14 is set to guide the powder that has completed the particle size classification into the discharge pipe 15 and discharge it in a centralized manner. There are two blowers 21 in total, and the two blowers 21 are symmetrically arranged and electrically connected to the operation panel. The two ends of the classification tank 11 are symmetrically connected with a support frame 13, and the blower 21 is installed on the top of the support frame 13; the support frame 13 is set to fix and support the blower 21, and the two blowers 21 are set to ensure the wind speed of the powder for particle size classification. force, the end of the air inlet pipe 22 away from the blower 21 penetrates the wall of the grading tank 11 and extends to be connected with the outer wall of the feed hopper 12, and the air inlet pipe 22 is connected with the corresponding air delivery pipe 23 through the horizontal diverter pipe 24; after the movement of the blower 21 is started, the blower 21 works and transmits the generated wind through the air inlet pipe 22, and then the wind in the air inlet pipe 22 is diverted and transported through the horizontal diverter pipe 24 and the vertical diverter pipe 25, and the lower end of the air inlet pipe 22 is connected with the vertical diverter pipe 25, and the vertical diverter pipe 25 is connected with the connected air inlet pipe 22 and the air delivery pipe 23, and the lower end of the vertical diverter pipe 25 penetrates the partition plate 26 and extends to be connected with the nozzle 27;After the wind in the air inlet pipe 22 and the air delivery pipe 23 flows into the vertical shunt pipe 25, the wind continues to flow in the vertical shunt pipe 25 and flows into the jet head 27, and then the wind is ejected from the jet head 27 and used to blow the powder. The two ends of the grading top plate 31 are connected to the inner wall of the grading tank 11, and the inner sides of the grading top plate 31, the grading middle plate 32, and the grading bottom plate 33 are all connected with a filter screen 34. The apertures of the filter screens 34 connected to the grading top plate 31, the grading middle plate 32, and the grading bottom plate 33 are reduced in sequence. After the powder enters the grading tank 11, the powder is sprayed out from the jet head 27. The powders that continue to sink meet the filter screen 34 inside the grading top plate 31, and the powders that are larger than the pore size of the filter screen 34 inside the grading top plate 31 are retained on the grading top plate 31, thereby achieving a preliminary classification of the powder particle size. Then, the powders that continue to sink meet the filter screen 34 inside the grading middle plate 32, and the powders that are larger than the pore size of the filter screen 34 inside the grading middle plate 32 are retained on the grading middle plate 32, thereby achieving a secondary classification of the powder particle size. Then, the powders that continue to sink meet the filter screen 34 inside the grading bottom plate 33, and the powders that are larger than the pore size of the filter screen 34 inside the grading middle plate 32 are retained on the grading middle plate 32, thereby achieving a secondary classification of the powder particle size. The powder with the aperture of the filter screen 34 inside the grading bottom plate 33 is retained on the grading bottom plate 33, so as to achieve the three-stage grading of the powder particle size, and then the three-stage grading of the powder particle size, so as to ensure the effect of particle size grading. There are six discharge pipes 35 in total, and every two discharge pipes 35 are used as a group. The two discharge pipes 35 in the same group are symmetrically arranged. The wall of the connection between the grading tank 11 and the discharge pipe 35 is provided with a through hole groove; the discharge pipe 35 is arranged to discharge the powder that has completed the particle size grading out of the grading tank 11, and then the powder passes through the discharge pipe 35. After being discharged from the classification tank 11, the electric push rods 36 are symmetrically arranged in groups of two, and the electric push rods 36 are electrically connected to the operation panel. The number of the electric push rods 36 is the same as the number of the discharge pipes 35, and the size of the discharge plate 37 matches the size of the through-hole groove opened in the wall of the classification tank 11; when the powder that has completed the particle size classification needs to be discharged from the classification tank 11, the operation of the electric push rods 36 is started, and then the electric push rods 36 are contracted and drive the discharge plate 37 to move upward, and then the powder flows into the discharge pipe 35 from the through-hole groove opened in the wall of the classification tank 11. ;
[0036] The working principle of the utility model is as follows: when the powder is subjected to particle size classification, the top cover of the feed hopper 12 is opened, and then the powder is added into the classification tank 11 through the feed hopper 12, and after the movement of the blower 21 is started, the blower 21 works and the generated wind is transported through the air intake pipe 22, and then the wind in the air intake pipe 22 is diverted and transported through the horizontal diverter pipe 24 and the vertical diverter pipe 25, and when the wind in the air intake pipe 22 and the air delivery pipe 23 flows into the vertical diverter pipe 25, the wind continues to flow in the vertical diverter pipe 25 and flows into the nozzle. 27, and then the wind is ejected from the jet head 27 and used to blow the powder. After the powder enters the classification tank 11, it sinks under the action of the wind blown by the jet head 27 and its own gravity. The sinking powder encounters the filter screen 34 inside the classification top plate 31, and the powder larger than the pore size of the filter screen 34 inside the classification top plate 31 is retained on the classification top plate 31, thereby achieving preliminary classification of the powder particle size. Then, the powder that continues to sink encounters the filter screen 34 inside the classification middle plate 32, and the powder larger than the pore size of the filter screen 34 inside the classification middle plate 32 is retained. The powder is retained on the grading middle plate 32 to achieve secondary classification of the powder particle size. Then, the powder that continues to sink encounters the filter screen 34 on the inner side of the grading bottom plate 33. The powder with a pore size larger than that of the filter screen 34 on the inner side of the grading bottom plate 33 is retained on the grading bottom plate 33 to achieve tertiary classification of the powder particle size. Then, the powder is graded three times to ensure the effect of particle size classification. The discharge pipe 35 is set to discharge the powder that has completed particle size classification out of the grading tank 11. Then, the powder is discharged from the grading tank 11 through the discharge pipe 35 for collection. When it is needed, The powder that has completed particle size classification is discharged from the classification tank 11, and the operation of the electric push rod 36 is started. Then the electric push rod 36 contracts and drives the discharge plate 37 to move upward. Then the powder flows into the discharge pipe 35 through the through-hole groove opened in the wall of the classification tank 11. The support frame 13 is used to fix and support the blower 21. The two blowers 21 are used to ensure the wind force for particle size classification of the powder. The guide plate 14 is used to guide the powder that has completed particle size classification into the discharge pipe 15 for centralized discharge.
[0037] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0038] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.
Claims
1. A powder particle size classification device, comprising a tank assembly (1), a blowing assembly (2), and a classification assembly (3), wherein the tank assembly (1) comprises a classification tank (11), and a feed hopper (12) is connected to the top of the classification tank (11), characterized in that: The lower end of the classification tank (11) is connected to a discharge pipe (15), the blowing assembly (2) comprises a blower (21), the output end of the blower (21) is connected to an air intake pipe (22), the outer wall of the air intake pipe (22) is connected to a transverse flow dividing pipe (24), the end of the transverse flow dividing pipe (24) away from the air intake pipe (22) is connected to an air supply pipe (23), the lower end of the air supply pipe (23) is connected to a vertical flow dividing pipe (25), the inner wall of the classification tank (11) is connected to a partition (26), the lower end of the partition (26) is connected to a vertical flow dividing pipe (25), and the lower end of the partition (26) is connected to a vertical flow dividing pipe (25). The end of the grading tank (11) is connected to a nozzle (27), the grading assembly (3) comprises a grading top plate (31), a grading middle plate (32) is arranged below the grading top plate (31), a grading bottom plate (33) is arranged below the grading middle plate (32), a filter screen (34) is connected to the inner side of the grading top plate (31), the outer wall of the grading tank (11) is connected to a discharge pipe (35), the inner wall of the grading tank (11) is connected to an electric push rod (36) through a mounting block, and the output end of the electric push rod (36) is connected to a discharge plate (37).
2. A powder particle size classification device according to claim 1, characterized in that: The lower end of the feed hopper (12) passes through the partition (26) and extends to the inner side of the grading tank (11); the top of the feed hopper (12) is rotatably connected to a top cover via a hinge shaft; the inner wall of the grading tank (11) is connected to a material guide plate (14); and the discharge pipe (15) is connected to a valve.
3. A powder particle size classification device according to claim 1, characterized in that: A total of two blowers (21) are provided, and the two blowers (21) are symmetrically arranged and electrically connected to the operation panel. The two ends of the grading tank (11) are symmetrically connected to the support frame (13), and the blowers (21) are installed on the top of the support frame (13).
4. A powder particle size classification device according to claim 1, characterized in that: One end of the air inlet pipe (22) away from the blower (21) penetrates the wall of the classification tank (11) and extends to be connected to the outer wall of the feed hopper (12). The air inlet pipe (22) is connected to the corresponding air delivery pipe (23) through a transverse diverter pipe (24).
5. The powder particle size classification device according to claim 1, characterized in that: The lower end of the air intake pipe (22) is connected to a vertical shunt pipe (25), and the vertical shunt pipe (25) is connected to the air intake pipe (22) and the air delivery pipe (23). The lower end of the vertical shunt pipe (25) passes through the partition (26) and extends to be connected to the injection head (27).
6. The powder particle size classification device according to claim 1, characterized in that: Both ends of the grading top plate (31) are connected to the inner wall of the grading tank (11), and the inner sides of the grading top plate (31), the grading middle plate (32), and the grading bottom plate (33) are all connected to filter screens (34), and the apertures of the filter screens (34) connected to the grading top plate (31), the grading middle plate (32), and the grading bottom plate (33) decrease in sequence.
7. The powder particle size classification device according to claim 1, characterized in that: A total of six discharge pipes (35) are provided, and two of the discharge pipes (35) form a group for common use. The two discharge pipes (35) in the same group are symmetrically arranged, and a through hole groove is provided on the wall of the connection between the grading tank (11) and the discharge pipe (35).
8. The powder particle size classification device according to claim 1, characterized in that: The electric push rods (36) are symmetrically arranged in groups of two each. The electric push rods (36) are electrically connected to the operation panel. The number of the electric push rods (36) is the same as the number of the discharge pipes (35). The size of the discharge plate (37) matches the size of the through hole groove opened on the wall of the grading tank (11).