Metal powder drying device

Abstract

The utility model provides a metal powder drying device which comprises a feeding hopper, a first heating assembly, a drying assembly and a storage assembly, a drying cavity is formed in the side wall of the feeding hopper, the first heating assembly is contained in the drying cavity, and the drying assembly comprises a circulating fan, a drying cylinder, a drying bin and a circulating pipe. One end of the drying cylinder is connected to the feeding hopper, the drying bin is arranged in the drying cylinder, one end of the drying bin communicates with the feeding hopper, the circulating fan is connected to the drying cylinder and the drying cavity, the drying cylinder communicates with the drying cavity through a circulating pipe, the storage assembly comprises a storage tank, and the storage tank is connected to the other end of the drying cylinder and communicates with the drying bin; thus, the materials are subjected to multi-stage air drying through the first heating assembly and the circulating fan, the drying efficiency is improved, meanwhile, high-temperature gas generated by the first heating assembly is recycled through the circulating fan and the circulating pipe, energy consumption is reduced, and the energy consumption is reduced on the basis of improving the drying efficiency.

Description

Technical Field

[0001] The present disclosure relates to the technical field of defect detection, and in particular, to a drying device for metal powder. Background Art

[0002] Currently, gas atomization method is mostly used in the production of 3D printing metal powder. The metal powder prepared by the gas atomization method needs to be dried first and then screened to realize the production of metal powder. In the current metal powder drying device, high-temperature gas is mostly used for drying. Usually, an air inlet and an air outlet are provided on the drying outer tube, and high-temperature gas is introduced into the drying outer tube through the air inlet to heat and dry the metal powder in the drying inner tube arranged in the drying outer tube. The high-temperature gas is discharged through the air outlet on the drying outer tube after passing through the drying inner tube. This indirect drying of the material by high-temperature gas makes the drying of the metal powder more uniform. However, after the high-temperature gas is discharged through the air outlet on the drying outer tube after passing through the drying inner tube, it takes away a part of the heat at the same time, resulting in waste of heat energy. At the same time, the indirect drying of the metal powder by high-temperature gas results in low drying efficiency. Summary of the Utility Model

[0003] The present disclosure provides a drying device for metal powder to at least solve the above problems in the prior art.

[0004] To achieve the above object, the present disclosure provides the following technical solution: A drying device for metal powder, comprising:

[0005] A feeding hopper, a drying cavity is formed on the side wall of the feeding hopper, and the feeding hopper is used for feeding;

[0006] A first heating component, which is received in the drying cavity and connected to the feeding hopper, and the first heating component is used for drying the material in the feeding hopper;

[0007] A drying component, including a circulation fan, a drying cylinder, a drying bin and a circulation pipe. One end of the drying cylinder is connected to the feeding hopper, the drying bin is arranged inside the drying cylinder, and one end of the drying bin communicates with the feeding hopper and is used for receiving the material of the feeding hopper. The circulation fan is connected to the drying cylinder and the drying cavity, and the drying cylinder and the drying cavity are communicated through the circulation pipe;

[0008] A storage component, including a storage tank, the storage tank is connected to the other end of the drying cylinder and communicates with the drying bin; wherein, the circulation fan is used for extracting the high-temperature gas in the drying cavity and blowing it into the drying cylinder to dry the material falling from the feeding hopper into the drying bin.

[0009] In an implementable embodiment, the drying bin includes:

[0010] A plurality of drying tubes are arranged at intervals to form a honeycomb structure, and each of the drying tubes extends along the direction of gravity;

[0011] A first support plate is connected to one end of the drying cylinder. One end of each drying tube penetrates through the first support plate and is fixedly connected to the first support plate;

[0012] A second support plate is connected to the other end of the drying cylinder. The other end of each drying tube penetrates through the second support plate and is fixedly connected to the second support plate.

[0013] In an implementable embodiment, the feeding hopper includes:

[0014] A feeding inner shell is connected to one end of the drying cylinder and communicates with one end of the drying bin;

[0015] A feeding outer shell is sleeved on the feeding inner shell, and a drying cavity is formed between the feeding outer shell and the feeding inner shell. Wherein, the first heating component is arranged inside the drying cavity and is connected to the feeding inner shell, and the first heating component is used to heat the materials in the feeding inner shell.

[0016] In an implementable embodiment, the first heating component is a plurality of heating belts. The plurality of heating belts are arranged at intervals along the direction of gravity, and each heating belt surrounds the feeding inner shell.

[0017] In an implementable embodiment, the first heating component is in a strip structure, and the first heating component is spirally wound around the feeding inner shell.

[0018] In an implementable embodiment, the storage component further includes an isolation chassis. The isolation chassis is arranged inside the storage tank and is connected to the side wall of the storage tank. The isolation chassis is used to receive the materials falling from the drying bin.

[0019] In an implementable embodiment, a second heating component is further installed on the top wall of the storage tank. The second heating component is used to heat the materials falling from the drying bin onto the isolation chassis.

[0020] In an implementable embodiment, the storage component further includes a vibrating screen. The vibrating screen is arranged inside the storage tank and is connected to the side wall of the storage tank, and the vibrating screen is arranged between the storage tank and the isolation chassis and is used to receive the materials falling from the isolation chassis.

[0021] In an implementable embodiment, the storage component further includes a humidity meter. The humidity meter is arranged between the isolation chassis and the top wall of the storage tank, and the humidity meter is connected to the side wall of the storage tank.

[0022] In an implementable embodiment, the drying device for metal powder further includes a stirring assembly, and the stirring assembly includes:

[0023] A connecting bracket; connected to the feeding hopper;

[0024] A driving member, connected to one side of the connecting bracket;

[0025] A rotating shaft, arranged on the other side of the connecting bracket, and the rotating shaft is connected to the driving member and rotatably connected to the connecting bracket;

[0026] A stirring member, the stirring member is connected to the rotating shaft and is used for stirring the material in the feeding hopper, and the driving member is used for driving the rotating shaft to drive the stirring member to rotate.

[0027] In the above drying device for metal powder, first, the material is put into the feeding hopper. The humidity of the material just put into the feeding hopper is relatively high. The material in the feeding hopper is directly subjected to primary drying by heating through the first heating assembly located in the drying cavity. The drying temperature generated by the first heating assembly is higher, so that the drying efficiency is higher. Then, the material after primary drying falls into the drying bin. The circulating fan extracts the high-temperature gas generated by the first heating assembly in the drying cavity and blows it into the drying cylinder to perform secondary drying on the material in the drying bin. The heat circulation between the drying bin and the drying cavity is realized through the circulation pipe, greatly reducing the energy consumption; in this way, the material is subjected to multi-stage air drying through the first heating assembly and the circulating fan, improving the drying efficiency. At the same time, the circulating fan and the circulation pipe recycle the high-temperature gas generated by the first heating assembly, reducing the energy consumption, thereby realizing the reduction of energy consumption on the basis of improving the drying efficiency.

[0028] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By referring to the accompanying drawings and reading the following detailed description, the above and other purposes, features and advantages of the exemplary embodiments of the present disclosure will become easily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, where:

[0030] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0031] Figure 1 Shows a schematic structural diagram of the drying device for metal powder in an embodiment of the present disclosure;

[0032] Figure 2 Shows Figure 1 The cross-sectional structural diagram of

[0033] Figure 3 shows Figure 1 the exploded structural schematic diagram of the drying cylinder and the drying bin in

[0034] Figure 4 shows Figure 1 the structural schematic diagram of the stirring assembly in

[0035] Description of the reference numerals in the figure:

[0036] In the figure: 11, feeding hopper, 111, inner feeding shell, 112, outer feeding shell, 113, drying chamber, 12, first heating assembly, 13, drying assembly, 131, circulation fan, 132, drying cylinder, 133, drying bin, 1331, drying pipe, 1332, first support plate, 1333, second support plate, 134, circulation pipe, 14, material storage assembly, 141, storage tank, 142, isolation chassis, 143, second heating assembly, 144, vibrating screen, 145, humidity meter, 15, stirring assembly, 151, connecting bracket, 152, driving member, 153, rotating shaft, 154, stirring member. Detailed implementation manners

[0037] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present disclosure.

[0038] It should be understood that various forms of processes shown above can be used, steps can be reordered, added, or deleted. For example, the steps recorded in the present disclosure can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of the present disclosure can be achieved, and no limitations are imposed herein.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise specifically defined.

[0040] Please refer to Figure 1 and Figure 2, this embodiment provides a drying device for metal powder. The drying device for metal powder includes a feeding hopper 11, a first heating component 12, a drying component 13 and a material storage component 14. A drying chamber 113 is formed on the side wall of the feeding hopper 11. The feeding hopper 11 is used for feeding. The first heating component 12 is received in the drying chamber 113 and connected to the feeding hopper 11. The first heating component 12 is used for drying the materials in the feeding hopper 11. The drying component 13 includes a circulation fan 131, a drying cylinder 132, a drying bin 133 and a circulation pipe 134. One end of the drying cylinder 132 is connected to the feeding hopper 11. The drying bin 133 is arranged inside the drying cylinder 132, and one end of the drying bin 133 communicates with the feeding hopper 11 and is used for receiving the materials in the feeding hopper 11. The circulation fan 131 is connected to the drying cylinder 132 and the drying chamber 113, and the drying cylinder 132 and the drying chamber 113 are communicated through the circulation pipe 134. The material storage component 14 includes a storage tank 141. The storage tank 141 is connected to the other end of the drying cylinder 132 and communicates with the drying bin 133. The circulation fan 131 is used for extracting the high-temperature gas in the drying chamber 113 and blowing it into the drying cylinder 132 to dry the materials falling from the feeding hopper 11 into the drying bin 133. Exemplarily, the material can be metal powder, and the first heating component 12 can be a resistance heater.

[0041] In the above drying device for metal powder, first, the materials are put into the feeding hopper 11. The humidity of the materials just put into the feeding hopper 11 is relatively high. The materials in the feeding hopper 11 are directly dried at the first level by the first heating component 12 located in the drying chamber 113. The drying temperature generated by the first heating component 12 is higher, so that the drying efficiency is higher. Then, the materials after the first-level drying fall into the drying bin 133. The circulation fan 131 extracts the high-temperature gas generated by the first heating component 12 in the drying chamber 113 and blows it into the drying cylinder 132 to perform secondary drying on the materials in the drying bin 133. The heat circulation between the drying bin 133 and the drying chamber 113 is realized through the circulation pipe 134, greatly reducing the energy consumption. In this way, the materials are air-dried at multiple levels by the first heating component 12 and the circulation fan 131, improving the drying efficiency. At the same time, the high-temperature gas generated by the first heating component 12 is recycled through the circulation fan 131 and the circulation pipe 134, reducing the energy consumption, so as to realize the reduction of energy consumption on the basis of improving the drying efficiency.

[0042] Please refer to Figure 3, in some embodiments, the drying bin 133 includes a plurality of drying tubes 1331, a first support plate 1332, and a second support plate 1333. The plurality of drying tubes 1331 are arranged at intervals to form a honeycomb structure, and each drying tube 1331 extends along the direction of gravity. The first support plate 1332 is connected to one end of the drying cylinder 132. One end of each drying tube 1331 penetrates through the first support plate 1332 and is fixedly connected to the first support plate 1332. The second support plate 1333 is connected to the other end of the drying cylinder 132. The other end of each drying tube 1331 penetrates through the second support plate 1333 and is fixedly connected to the second support plate 1333. In this way, the contact area with the high-temperature gas is increased through the plurality of drying tubes 1331, so as to further improve the drying efficiency.

[0043] Please refer to Figure 2 , in some embodiments, the feeding hopper 11 includes a feeding inner shell 111 and a feeding outer shell 112. The feeding inner shell 111 is connected to one end of the drying cylinder 132 and communicates with one end of the drying bin 133. The feeding outer shell 112 is sleeved on the feeding inner shell 111, and a drying cavity 113 is formed between the feeding outer shell 112 and the feeding inner shell 111. The first heating component 12 is arranged inside the drying cavity 113 and is connected to the feeding inner shell 111. The first heating component 12 is used to heat the material in the feeding inner shell 111. Specifically, both the feeding inner shell 111 and the feeding outer shell 112 are conical structures, or the feeding inner shell 111 is a conical structure, the feeding outer shell 112 is a straight pipe structure, and the feeding inner shell 111 is made of a heat-conducting material, such as ceramic material or steel material, etc., and the feeding outer shell 112 is made of a heat-insulating material, such as glass fiber, heat-reflective material or vacuum material, etc.

[0044] In this way, it is convenient to transfer the heat generated by the first heating component 12 to the material in the feeding inner shell 111 through the feeding inner shell 111, and the first heating component 12 is in direct contact with the feeding inner shell 111, so that the drying temperature is higher, which is beneficial to quickly drying the material with higher humidity contained in the feeding inner shell 111, thereby improving the drying efficiency. At the same time, the heat loss is reduced by heat-insulating the feeding outer shell 112.

[0045] In this embodiment, the first heating component 12 is a plurality of heating belts. The plurality of heating belts are arranged at intervals along the direction of gravity, and each heating belt surrounds the feeding inner shell 111, so as to uniformly heat the material in the feeding inner shell 111.

[0046] In this embodiment, the first heating component 12 is in a strip shape and is spirally wound around the feeding inner shell 111, so as to uniformly heat the material in the feeding inner shell 111.

[0047] Please refer to Figure 2, in some embodiments, the storage component 14 further includes an isolation chassis 142. The isolation chassis 142 is disposed inside the storage tank 141 and connected to the side wall of the storage tank 141. The isolation chassis 142 is used to receive the materials falling from the drying bin 133; the storage component 14 further includes a humidity meter 145. The humidity meter 145 is disposed between the isolation chassis 142 and the top wall of the storage tank 141, and the humidity meter 145 is connected to the side wall of the storage tank 141.

[0048] In this way, the materials falling from the drying component 13 are temporarily stored by the isolation chassis 142, and the humidity meter 145 is used to detect whether the dryness of the materials temporarily stored by the isolation chassis 142 meets the standard.

[0049] Please refer to Figure 1 , in this embodiment, the isolation chassis 142 can be a push-pull structure, that is, the isolation chassis 142 can be pushed and pulled along the radial direction of the storage tank 141 to facilitate opening or closing the isolation chassis 142. When the isolation chassis 142 is closed, it is used to temporarily store materials. When the isolation chassis 142 is opened, the temporarily stored materials fall.

[0050] In this embodiment, the isolation chassis 142 can also be a flip structure, that is, both ends on the radial line of the isolation chassis 142 are rotatably connected to the flip brackets. Both ends of the flip brackets are fixedly connected to the side wall of the storage tank 141, and the isolation chassis 142 is driven to flip by an electric telescopic rod. One end of the electric telescopic rod is rotatably connected to the isolation chassis 142, and the other end of the electric cylinder telescopic rod is rotatably connected to the flip bracket. Moreover, a triangular structure is formed by enclosing the electric telescopic rod, the isolation chassis 142 and the flip bracket, and the triangular structure changes with the telescopic movement of the electric telescopic rod to adjust the inclination angle of the isolation chassis 142, so as to realize the opening or closing of the isolation chassis 142 through the telescopic movement of the electric telescopic rod.

[0051] Please refer to Figure 2 , in some embodiments, a second heating component 143 is further installed on the top wall of the storage tank 141. The second heating component 143 is used to heat the materials falling from the drying bin 133 onto the isolation chassis 142. Exemplarily, the second heating component 143 can be a resistance heater; in this way, when the humidity meter 145 detects that the dryness of the materials temporarily stored by the isolation chassis 142 does not meet the standard, the second heating component 143 is started, and the second heating component 143 heats the materials on the isolation chassis 142 until the humidity meter 145 detects that the dryness of the materials temporarily stored on the isolation bottom plate meets the standard, and then the isolation chassis 142 is opened so that the materials temporarily stored by the isolation chassis 142 fall to the bottom of the storage tank 141.

[0052] In this embodiment, a moisture discharge hole is further provided on the top wall of the storage tank 141. The moisture discharge hole is spaced from the second heating component 143 to facilitate the steam generated when the second heating component 143 heats the materials to be discharged through the moisture discharge hole.

[0053] Please refer to Figure 2 Figure 2

[0054] In some embodiments, the storage component 14 further includes a vibrating screen 144. The vibrating screen 144 is disposed inside the storage tank 141 and connected to the side wall of the storage tank 141. The vibrating screen 144 is disposed between the storage tank 141 and the isolation chassis 142 and is used to receive the materials falling from the isolation chassis 142. Exemplarily, the vibrating screen 144 is an ultrasonic vibrating screen 144.

[0055] In this way, the materials that have been dried and passed the dryness test by the hygrometer 145 are directly screened by the vibrating screen 144, eliminating the need for manual handling to the screening workshop for screening operations, saving time and effort, and improving the production efficiency of the materials.

[0056] Please refer to Figure 4 Figure 4

[0057] In some embodiments, the drying device for metal powder further includes a stirring component 15. The stirring component 15 includes a connecting bracket 151, a driving member 152, a rotating shaft 153, and a stirring member 154. The connecting bracket 151 is connected to the feeding hopper 11. Specifically, the connection between the connecting bracket 151 and the feeding hopper 11 is detachable. For example, it is a bolt connection. The driving member 152 is connected to one side of the connecting bracket 151. The rotating shaft 153 is disposed on the other side of the connecting bracket 151. The rotating shaft 153 is connected to the driving member 152 and rotatably connected to the connecting bracket 151. The stirring member 154 is connected to the rotating shaft 153 and is used to stir the materials in the feeding hopper 11. The driving member 152 is used to drive the rotating shaft 153 to drive the stirring member 154 to rotate. Exemplarily, the driving member 152 can be a motor.

[0058] Although the materials just fed into the feeding hopper 11 have undergone dehydration treatment, the humidity of the materials is still relatively high, and they are prone to caking, which affects the feeding speed. Therefore, the stirring assembly 15 is used to stir the materials in the feeding hopper 11 to prevent the materials in the feeding hopper 11 from affecting the feeding speed due to caking and the drying efficiency of the materials. At the same time, by stirring the materials with the stirring assembly 15, the first heating assembly 12 can heat the materials in the feeding hopper 11 more evenly, and make the water vapor in the materials easier to escape from the materials, thereby further improving the dehydration efficiency of the materials.

[0059] In this embodiment, the stirring member 154 can be a stirring rod or a stirring blade.

[0060] The working principle of the above-mentioned drying device for metal powder is roughly as follows:

[0061] First, the materials are fed into the feeding hopper 11. The first heating assembly 12 is used to heat the materials in the feeding hopper 11, and the stirring assembly 15 is used to stir the materials in the feeding hopper 11, so as to facilitate the first heating assembly 12 to heat the materials in the feeding hopper 11 evenly and enable the feeding hopper 11 to feed stably.

[0062] Then, the circulating fan 131 and the circulating pipe 134 are used to dry the materials in the drying assembly 13. The high-temperature air flow blown by the circulating fan 131 has a more uniform temperature, which is convenient for evenly drying the materials in the drying bin 133. Moreover, the circulating fan 131 and the circulating pipe 134 realize the recycling of high-temperature gas, thereby improving the utilization efficiency of thermal energy and reducing energy consumption.

[0063] Finally, the materials dried in the drying bin 133 fall onto the isolation chassis 142. The moisture meter 145 is used to detect whether the dryness of the materials on the isolation chassis 142 meets the standard. When the dryness does not meet the standard, the second heating assembly 143 is used to continue heating the materials until the dryness of the materials meets the standard. Then, the isolation chassis 142 is opened to enable the materials on the isolation chassis 142 to fall onto the vibrating screen 144, and screening operation is carried out through the vibrating screen 144, so as to realize the integrated operation of drying and screening of the materials.

[0064] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present disclosure, and all of them should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A metal powder drying device, characterized in that: include: An upper hopper, a drying chamber is formed on the side wall of the upper hopper, and the upper hopper is used for loading materials; A first heating component is received in the drying chamber and connected to the upper hopper, and the first heating component is used to dry the material in the upper hopper; A drying assembly, comprising a circulation fan, a drying cylinder, a drying chamber and a circulation pipe, wherein one end of the drying cylinder is connected to the upper hopper, the drying chamber is arranged inside the drying cylinder, and one end of the drying chamber is connected to the upper hopper and is used to receive materials from the upper hopper, the circulation fan is connected to the drying cylinder and the drying chamber, and the drying cylinder and the drying chamber are connected through the circulation pipe; The material storage assembly includes a material storage tank, which is connected to the other end of the drying cylinder and communicated with the drying bin; wherein, The circulation fan is used to extract the high-temperature gas in the drying chamber and blow it into the drying cylinder to dry the materials dropped from the upper hopper into the drying bin.

2. The metal powder drying device according to claim 1, characterized in that: The drying bin comprises: A plurality of drying tubes, the plurality of drying tubes are arranged at intervals to form a honeycomb structure, and each of the drying tubes extends along the direction of gravity; A first support plate connected to one end of the drying cylinder, one end of each drying tube passing through the first support plate and fixedly connected to the first support plate; The second support plate is connected to the other end of the drying cylinder, and the other end of each drying tube is passed through the second support plate and fixedly connected to the second support plate.

3. The metal powder drying device according to claim 1, characterized in that: The upper hopper comprises: A feeding inner shell connected to one end of the drying cylinder and connected to one end of the drying bin; The feeding outer shell is sleeved on the feeding inner shell, and the drying chamber is formed between the feeding inner shell and the feeding outer shell; wherein, The first heating component is arranged inside the drying chamber and connected to the feeding inner shell, and the first heating component is used for heating the material in the feeding inner shell.

4. The metal powder drying device according to claim 3, characterized in that: The first heating component is a plurality of heating belts, which are arranged at intervals along the gravity direction, and each of the heating belts surrounds the loading inner shell.

5. The metal powder drying device according to claim 3, characterized in that: The first heating component is a strip-shaped structure, and the first heating component is spirally wound on the feeding inner shell.

6. The metal powder drying device according to claim 1, characterized in that: The material storage assembly also includes an isolation chassis, which is arranged inside the material storage tank and connected to the side wall of the material storage tank. The isolation chassis is used to receive the materials dropped from the drying bin.

7. The metal powder drying device according to claim 6, characterized in that: A second heating component is also installed on the top wall of the storage tank, and the second heating component is used to heat the material that falls from the drying bin onto the isolation chassis.

8. The metal powder drying device according to claim 6, characterized in that: The material storage assembly also includes a vibrating screen, which is arranged inside the material storage tank and connected to the side wall of the material storage tank. The vibrating screen is arranged between the material storage tank and the isolation chassis and is used to receive the material dropped from the isolation chassis.

9. The metal powder drying device according to claim 6, characterized in that: The material storage assembly further comprises a hygrometer, which is arranged between the isolation bottom plate and the top wall of the material storage tank, and is connected to the side wall of the material storage tank.

10. The metal powder drying device according to claim 1, characterized in that: The metal powder drying device further comprises a stirring assembly, wherein the stirring assembly comprises: Connecting bracket; connected to the upper hopper; A driving member connected to one side of the connecting bracket; A rotating shaft is provided at the other side of the connecting bracket, and the rotating shaft is connected to the driving member and is rotatably connected to the connecting bracket; A stirring member is connected to the rotating shaft and is used to stir the material in the upper hopper, and the driving member is used to drive the rotating shaft to drive the stirring member to rotate.

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