CN115307388A - Metal powder cold drying device - Google Patents
Metal powder cold drying device Download PDFInfo
- Publication number
- CN115307388A CN115307388A CN202210978688.5A CN202210978688A CN115307388A CN 115307388 A CN115307388 A CN 115307388A CN 202210978688 A CN202210978688 A CN 202210978688A CN 115307388 A CN115307388 A CN 115307388A
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- Prior art keywords
- metal powder
- tank body
- cold drying
- powder
- detection device
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/041—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
- F26B9/063—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers for drying granular material in bulk, e.g. grain bins or silos with false floor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a metal powder cold drying device, which comprises a powder storage tank, an inert gas supply assembly, a vacuumizing assembly and a monitoring assembly, wherein the inert gas supply assembly is arranged on the powder storage tank; the powder storage tank comprises a tank body, a feeding end and a discharging end, a storage cavity for storing metal powder is arranged in the tank body, and the feeding end and the discharging end are connected with the tank body and communicated with the storage cavity; the inert gas supply assembly is connected with the tank body and is used for filling the storage cavity with inert gas; the vacuumizing assembly comprises an air exhaust pipeline and a vacuum pump, one end of the air exhaust pipeline is connected with the tank body, and the other end of the air exhaust pipeline is connected with the vacuum pump; the monitoring assembly is connected with the vacuum pump. The powder storage tank can be used as a powder container, the cavity size is large, and the amount of metal powder which can be dried in one time is large; the metal powder does not need to be circulated for many times in the process of drying the metal powder, so that the waste and the cross contamination of the metal powder are avoided.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a metal powder cold drying device.
Background
At present, the metal powder is dried in a vacuum drying oven, and the drying process is roughly as follows: the powder is poured out of the original container and loaded in a metal tray, then the metal tray is placed in a vacuum drying oven for drying, and the powder is loaded back into the powder container after being dried. In the process of drying the metal powder, the vacuum drying oven is firstly vacuumized, and then the powder is heated to evaporate moisture and is extracted.
The following problems exist in the drying of metal powder by using a vacuum drying oven:
1. the amount of powder which can be dried in a single time is limited by the size of the inner cavity of the vacuum drying oven, and if a vacuum drying oven with a larger size is adopted, the cost is increased;
2. powder is dried by adopting a vacuum drying oven, metal powder is required to be poured into a metal tray of the drying oven firstly, and then the powder container is arranged again after the metal powder is dried, and the powder is required to be recycled for many times in the drying process, so that powder waste and cross contamination are easily caused, and potential safety hazards of contact with people exist;
3. adopt vacuum drying oven to carry out powder drying, need be to drying time strict control, will ensure moreover that the gas tightness of equipment is up to standard all the time, otherwise can have drying time overlength or oxygen content too high to lead to the powder oxidation, directly scrap even, every kind of different metal powder drying time is also different moreover, needs the difference to be treated.
Disclosure of Invention
The invention aims to provide a metal powder cold drying device, which can dry a large amount of metal powder in a single time and does not need to have multiple turnover of the metal powder in the metal powder drying process.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a metal powder cold drying device comprises a powder storage tank, an inert gas supply assembly, a vacuumizing assembly and a monitoring assembly; the powder storage tank comprises a tank body, a feeding end and a discharging end, a storage cavity for storing metal powder is arranged in the tank body, and the feeding end and the discharging end are connected with the tank body and communicated with the storage cavity; the inert gas supply assembly is connected with the tank body and is used for filling the storage cavity with inert gas; the vacuum pumping assembly comprises a pumping pipeline and a vacuum pump, one end of the pumping pipeline is connected with the tank body, and the other end of the pumping pipeline is connected with the vacuum pump; the monitoring assembly is connected with the vacuum pump.
Further, the inert gas supply assembly comprises a gas transmission pipeline, a pressure reducing valve, a throttle valve and a switch; one end of the gas transmission pipeline is connected with the tank body, and the other end of the gas transmission pipeline is connected with a gas source; the pressure reducing valve, the throttle valve and the switch are sequentially installed on the gas transmission pipeline.
Further, the vacuum pumping assembly also comprises a filter, and the filter is arranged on the air pumping pipeline and is positioned between the tank body and the vacuum pump.
Further, the monitoring assembly comprises a control system, a pressure detection device and a humidity detection device, wherein the pressure detection device is used for detecting the pressure in the storage cavity, and the humidity detection device is used for detecting the humidity in the storage cavity; the control system is respectively electrically connected with the pressure detection device, the humidity detection device and the vacuum pump.
Further, the pressure detection device is a pressure gauge.
Further, the humidity detection device is a hygrometer.
Further, the storage cavity is funnel-shaped; the feeding end and the discharging end are respectively arranged at the top and the bottom of the tank body.
Furthermore, the feed end and the discharge end are respectively provided with a control valve.
Further, the powder storage tank also comprises a supporting structure which is arranged on the periphery of the middle lower part of the tank body; the upper end of the supporting structure is an annular shell, and the lower end of the supporting structure is provided with four supports; the annular shell is wrapped on the periphery of the middle part of the tank body, and the four supports are symmetrically fixed on the lower part of the annular shell and surround the periphery of the discharge end.
Further, the powder storage tank also comprises a hanging ring which is fixed on the upper part of the tank body.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the powder storage tank can be used as a powder container, the size of the cavity of the powder storage tank is large, and the amount of metal powder which can be dried in one time is large;
2. when the metal powder cold drying device dries the metal powder, the metal powder is directly input into the storage cavity through the feed end for drying, and the dried metal powder can be continuously placed in the powder storage tank, so that the metal powder does not need to be circulated for many times, and the waste and the cross contamination of the metal powder are avoided;
3. control system can real time monitoring save the humidity value and the pressure value of intracavity to according to humidity value and pressure value control vacuum pump, drying metal powder energy-efficiently, guaranteeing that metal powder reaches the drying requirement, still avoided leading to the powder oxidation because of drying time overlength or oxygen content are too high.
Drawings
FIG. 1 is a schematic structural diagram of a metal powder cold drying apparatus in example 1 of the present invention;
fig. 2 is a schematic structural view of a powder storage tank in embodiment 1 of the present invention.
Wherein: 1. a powder storage tank; 11. a tank body; 12. a feed end; 13. a discharge end; 14. a support structure; 15. a hoisting ring; 21. a gas pipeline; 22. a pressure reducing valve; 23. a throttle valve; 24. a switch; 31. an air extraction pipeline; 32. a vacuum pump; 33. a filter; 40. a pressure gauge; 5. and (4) a gas source.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and detailed description, which are simplified in illustration only for the purpose of illustrating the basic structure of the present invention and thus only show the structure related to the present invention, and it should be noted that the embodiments and features of the embodiments may be combined with each other in the present application without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
Referring to fig. 1-2, a metal powder cold drying device includes a powder storage tank 1, an inert gas supply module, a vacuum pumping module and a monitoring module.
The powder storage tank 1 comprises a tank body 11, a feed end 12 and a discharge end 13. The tank body 11 is provided with a storage chamber therein for storing metal powder. The shape of the storage cavity can be set according to practical application, and can be in the shapes of an ellipse, a cylinder, a rectangular body, a cone and the like. Preferably, the storage chamber is funnel-shaped.
The feeding end 12 and the discharging end 13 are arranged on the tank body 11 and are communicated with a storage cavity of the tank body 11, the feeding end 12 is used for conveying metal powder to the storage cavity, and the discharging end 13 is used for outputting the dried metal powder from the storage cavity. As a specific embodiment, the discharging end 13 may be connected to the SLM equipment through a pipeline, and the powder storage tank 1 is used as a powder feeding tank of the SLM equipment to feed dry metal powder to the SLM equipment. The positional relationship of the tank 11, the feeding end 12 and the discharging end 13 can be set according to actual requirements, in this embodiment, the feeding end 12 is arranged at the top of the tank 11, and the discharging end 13 is arranged at the bottom of the tank 11.
The feeding end 12 and the discharging end 13 can be realized in various ways, and in this embodiment, the feeding end 12 and the discharging end 13 adopt pipe fitting structures.
The feeding end 12 and the discharging end 13 are respectively provided with a control valve for controlling the flow rate of feeding and discharging and the switching of on-off, so that the conveying process of the metal powder is easy to control, and the conveying safety is ensured.
Powder holding vessel 1 still includes bearing structure 14, bearing structure 14 sets up in jar body 11 on the periphery of lower position, bearing structure 14's upper end is annular casing, and the lower extreme is four supports, and annular casing parcel is in the periphery at jar body 11 middle part, and four support symmetries are fixed in the lower part of annular casing to encircle around discharge end 13, the support can support jar body 11 on the one hand, and on the other hand can protect discharge end 13, avoids discharge end 13 to receive the harm in transport or transportation. The bottom of support still is equipped with the slot, and the slot is used for supplying fork truck fork to get.
The powder storage tank 1 further comprises a lifting ring 17, which lifting ring 17 is fixed to the upper part of the tank body 11 for connection to a lifting device.
An inert gas supply unit is connected to the powder storage tank 1 for filling the powder storage tank 1 with inert gas. The inert gas supply assembly comprises a gas transmission pipeline 21, a pressure reducing valve 22, a throttle valve 23 and a switch 24, wherein one end of the gas transmission pipeline 21 is connected with the tank body 11, and the other end of the gas transmission pipeline is connected with the gas source 5 and is used for transmitting the inert gas in the gas source 5 to the storage cavity. A pressure reducing valve 22, a throttle valve 23 and a switch 24 are sequentially installed on the gas transmission pipe 21. Preferably, the switch 24 is a solenoid valve.
The vacuumizing assembly is connected with the powder storage tank 1 and is used for vacuumizing the powder storage tank 1. The vacuumizing assembly comprises an air exhaust pipeline 31, a vacuum pump 32 and a filter 33, wherein one end of the air exhaust pipeline 31 is connected with the tank body 11, and the other end of the air exhaust pipeline 31 is connected with the vacuum pump 32. The filter 33 is installed on the suction duct 31 and is disposed between the canister 11 and the vacuum pump 32.
Evacuation subassembly and inert gas supply assembly mutually support and exhaust powder holding vessel 1, make powder holding vessel 1 be in little negative pressure state to carry out the cold drying and fall the transformation to the metal powder in the powder holding vessel 1.
The monitoring assembly comprises a pressure detection device, a humidity detection device and a control system, wherein the pressure detection device is used for detecting the pressure in the storage cavity, and the humidity detection device is used for detecting the humidity in the storage cavity. Preferably, the pressure detecting device is a pressure gauge 40, and the pressure gauge 40 is installed on the air exhaust pipe 31 or the tank 11. The humidity detection device is a hygrometer which is arranged on the tank body 11. Control system is connected with hygrometer, manometer 40 and vacuum pump 32 electricity respectively, and control system receives humidity information and the pressure information that hygrometer and manometer 40 detected to according to humidity information and pressure information control vacuum pump, so that the metal powder to in the powder holding vessel 1 of high-efficient and ability carries out the drying.
The drying process of the metal powder cold drying device is as follows:
1. charging metal powder into the storage chamber of the powder storage tank 1 through the feed end 12;
2. opening the vacuum pump 32, pumping air into the powder storage tank 1 to make the pressure in the storage cavity of the powder storage tank 1 be micro negative pressure, and drying the metal powder;
3. opening the switch 24 of the inert gas supply unit to fill the powder storage tank 1 with gas, discharging the air in the powder storage tank 1, and then adjusting the pressure reducing valve 22 to an appropriate pressure and minimizing the modulation of the opening of the throttle valve 23;
4. the control system monitors the humidity value and the pressure value in the storage cavity in real time to ensure that the metal powder meets the drying requirement, and the inert gas supply assembly and the vacuumizing assembly are closed after the metal powder meets the drying requirement.
Can know by above-mentioned drying process, the cold drying device of metal powder of this application is at the in-process to metal powder drying, directly carries out the drying with metal powder in inputting the storage chamber through feed end 12, and the metal powder after the drying can continue to place in powder holding vessel 1, consequently need not have metal powder turnover many times, has avoided metal powder's waste and cross contamination. Simultaneously, the control system of the metal powder cold drying device of this application can real time monitoring save the humidity value and the pressure value of intracavity to according to humidity value and pressure value control vacuum pump, drying metal powder high-efficiently and energy-conservingly, when guaranteeing that metal powder reaches the drying requirement, can also avoid leading to the powder oxidation because of drying time overlength or oxygen content is too high. Moreover, the powder storage tank 1 of the present application can be used as a powder container, and the cavity size is large, and the amount of metal powder that can be dried in a single time is large.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific cases.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A metal powder cold drying device is characterized in that:
comprises a powder storage tank, an inert gas supply assembly, a vacuumizing assembly and a monitoring assembly;
the powder storage tank comprises a tank body, a feeding end and a discharging end, a storage cavity for storing metal powder is arranged in the tank body, and the feeding end and the discharging end are connected with the tank body and communicated with the storage cavity;
the inert gas supply assembly is connected with the tank body and is used for filling the storage cavity with inert gas;
the vacuumizing assembly comprises an air exhaust pipeline and a vacuum pump, one end of the air exhaust pipeline is connected with the tank body, and the other end of the air exhaust pipeline is connected with the vacuum pump;
the monitoring assembly is connected with the vacuum pump.
2. A metal powder cold drying apparatus as claimed in claim 1, wherein:
the inert gas supply assembly comprises a gas transmission pipeline, a pressure reducing valve, a throttle valve and a switch;
one end of the gas transmission pipeline is connected with the tank body, and the other end of the gas transmission pipeline is connected with a gas source;
the pressure reducing valve, the throttle valve and the switch are sequentially installed on the gas transmission pipeline.
3. A metal powder cold drying apparatus as claimed in claim 1, wherein:
the vacuum pumping assembly further comprises a filter, and the filter is arranged on the air pumping pipeline and is positioned between the tank body and the vacuum pump.
4. A metal powder cold drying apparatus as claimed in claim 1, wherein:
the monitoring assembly comprises a control system, a pressure detection device and a humidity detection device, the pressure detection device is used for detecting the pressure in the storage cavity, and the humidity detection device is used for detecting the humidity in the storage cavity;
the control system is respectively electrically connected with the pressure detection device, the humidity detection device and the vacuum pump.
5. A metal powder cold drying apparatus as claimed in claim 4, wherein:
the pressure detection device is a pressure gauge.
6. A metal powder cold drying apparatus as claimed in claim 4, wherein:
the humidity detection device is a hygrometer.
7. A metal powder cold drying apparatus as claimed in any one of claims 1 to 6, wherein:
the storage cavity is funnel-shaped;
the feeding end and the discharging end are respectively arranged at the top and the bottom of the tank body.
8. A metal powder cold drying apparatus as claimed in any one of claims 1 to 6, wherein:
and the feeding end and the discharging end are respectively provided with a control valve.
9. A metal powder cold drying apparatus as claimed in any one of claims 1 to 6, wherein:
the powder storage tank also comprises a supporting structure which is arranged on the periphery of the middle lower part of the tank body;
the upper end of the supporting structure is an annular shell, and the lower end of the supporting structure is provided with four supports;
the annular shell is wrapped on the periphery of the middle part of the tank body, and the four supports are symmetrically fixed on the lower part of the annular shell and surround the periphery of the discharge end.
10. A metal powder cold drying apparatus as claimed in any one of claims 1 to 6, wherein:
the powder storage tank also comprises a hanging ring which is fixed on the upper part of the tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210978688.5A CN115307388A (en) | 2022-08-16 | 2022-08-16 | Metal powder cold drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210978688.5A CN115307388A (en) | 2022-08-16 | 2022-08-16 | Metal powder cold drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115307388A true CN115307388A (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210978688.5A Pending CN115307388A (en) | 2022-08-16 | 2022-08-16 | Metal powder cold drying device |
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| CN (1) | CN115307388A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2886984A2 (en) * | 2013-12-18 | 2015-06-24 | Motan Holding GmbH | Method for drying and/or crystallising bulk material and plant for carrying out this method |
| CN104771852A (en) * | 2015-04-03 | 2015-07-15 | 煤炭科学技术研究院有限公司 | Pulverized coal tank inert gas protective device and application method thereof |
| CN111637690A (en) * | 2020-05-11 | 2020-09-08 | 常州奥凯干燥设备有限公司 | Novel vacuum drying machine device of pulsation replacement formula |
| CN213324725U (en) * | 2020-08-27 | 2021-06-01 | 湖南兴弘新材料科技有限公司 | Metal powder storage device for metal slurry |
| CN113513884A (en) * | 2021-04-26 | 2021-10-19 | 中南大学 | High-activity metal powder anti-oxidation drying device and drying method |
| CN216880414U (en) * | 2022-03-15 | 2022-07-05 | 新乡市伟良筛分机械有限公司 | Airtight screening plant of superfine metal powder |
-
2022
- 2022-08-16 CN CN202210978688.5A patent/CN115307388A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2886984A2 (en) * | 2013-12-18 | 2015-06-24 | Motan Holding GmbH | Method for drying and/or crystallising bulk material and plant for carrying out this method |
| CN104771852A (en) * | 2015-04-03 | 2015-07-15 | 煤炭科学技术研究院有限公司 | Pulverized coal tank inert gas protective device and application method thereof |
| CN111637690A (en) * | 2020-05-11 | 2020-09-08 | 常州奥凯干燥设备有限公司 | Novel vacuum drying machine device of pulsation replacement formula |
| CN213324725U (en) * | 2020-08-27 | 2021-06-01 | 湖南兴弘新材料科技有限公司 | Metal powder storage device for metal slurry |
| CN113513884A (en) * | 2021-04-26 | 2021-10-19 | 中南大学 | High-activity metal powder anti-oxidation drying device and drying method |
| CN216880414U (en) * | 2022-03-15 | 2022-07-05 | 新乡市伟良筛分机械有限公司 | Airtight screening plant of superfine metal powder |
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