CN112138989A - Active metal powder transports oxygen screen separation screening system - Google Patents
Active metal powder transports oxygen screen separation screening system Download PDFInfo
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- CN112138989A CN112138989A CN202010713457.2A CN202010713457A CN112138989A CN 112138989 A CN112138989 A CN 112138989A CN 202010713457 A CN202010713457 A CN 202010713457A CN 112138989 A CN112138989 A CN 112138989A
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- box body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
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Abstract
The invention discloses an active metal powder transportation oxygen-isolation screening system, which adopts an isolation box body as a sealed vibration screening environment of a vibration screening machine, a side front door is arranged on one side of the isolation box body, a sensor gas path interface arranged at the upper end of the isolation box body is used for connecting an oxygen sensor gas inlet pipe, a protection gas path interface is arranged on one side far away from the sensor gas path interface, protection gas is introduced through a protection gas source connected with the protection gas path interface, the protection gas path interface and the oxygen sensor gas inlet pipe are oppositely arranged to ensure the accuracy of the oxygen content detection of the isolation box body, a dehumidifier is used for dehumidifying and drying the interior of the isolation box body, closed-loop feedback control is carried out through an oxygen content detection sensor by taking the oxygen content value as a basis, the oxygen content value of the required environment is set according to different working conditions of actual, the system can ensure the internal environment when working, monitor the oxygen content in real time, and the device of the invention is simple, safe and reliable.
Description
Technical Field
The invention belongs to the field of active metal powder screening and transferring, and particularly relates to an active metal powder transferring oxygen-isolating screening system.
Background
The 3D printing technology is successfully applied to the fields of automobiles, energy sources, ships, aerospace and the like, and has a wide market prospect. The metal 3D printing technology has attracted attention as the most potential rapid prototyping technology, wherein the process methods for directly manufacturing metal functional parts mainly include wire material additive manufacturing and powder additive manufacturing due to different deposition forming filling materials, and the metal powder additive manufacturing mainly includes: selective Laser Sintering (SLS) technique, Direct Metal powder Laser Sintering (DMLS), Selective Laser Melting (SLM) technique, Laser Engineered Net Shaping (LENS) technique, and Electron Beam Selective Melting (EBSM) technique, etc.
The metal powder additive manufacturing technology is a huge branch in the field of metal additive manufacturing, is mainly applied to the industrial field due to high manufacturing precision and a formable complex structure, and has outstanding advantages in the fields of personalized medical parts, aerospace and automobiles. The powder which is not melted in the printing process can still be used as a raw material in theory for continuous use, but the particle size of the powder is likely to increase after a long-time high-temperature forming process, and the powder components, the particle size distribution and the particle surface morphology can all change along with the increase of the use times, so that the preparation and screening technology of the powder for 3D printing is one of the bottlenecks of the neck clamp. In recent years, active metal powder additive forming has been proposed, but a series of dangers and difficulties exist in the additive manufacturing process, and the method also becomes one of the reasons that the published reports on active metal powder additive manufacturing at home and abroad are less, for example, if the treatment process before and after 3D printing of magnesium alloy powder and the storage process of the powder are improper, potential safety hazards are easily buried, even danger occurs on the spot, and personal safety is threatened. Traditional powder such as titanium alloy, cobalt chromium alloy, stainless steel all lets in argon gas to the powder shifter inside before the powder screening, and the actual gas flow is given first in experience, does not have special oxygen content monitoring, stops to let in argon gas when the powder screening begins, and the whole powder screening process is ended. The inside water oxygen content of powder shifter can't be strictly guaranteed from beginning to end to whole process, even if the powder shifter begins when argon gas is insufficient or oxygen content exceeds standard in addition, follow-up no inert gas supplyes, be difficult to avoid equipment because of the not good leakage that causes of gas tightness, and then lead to not having the potential safety hazard of buying among the powder shifter process, and probably can't provide qualified screening powder of quality.
Disclosure of Invention
The invention aims to provide an active metal powder transferring, oxygen isolating and screening system to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
an active metal powder transfer oxygen-isolation screening system comprises an isolation box body and a vibration screening machine arranged in the isolation box body, wherein a side front door is arranged on one side of the isolation box body, and the side front door and the isolation box body are locked and fixed in a sealing mode through a door bolt clamp; the upper end of the isolation box body is provided with a sensor gas path interface which is connected with an oxygen sensor gas inlet pipe, and an oxygen sensor is arranged in the oxygen sensor gas inlet pipe; the side wall of the isolation box body, which is adjacent to the side provided with the front door on the side face, is provided with a protection gas circuit interface, a drainage steam hole interface and a compressed air interface, the protection gas circuit interface is arranged on one side far away from the sensor gas circuit interface, and the protection gas circuit interface is connected to a protection gas source through a pipeline; a dehumidifier is arranged in the isolation box body, and a water drainage steam hole pipe of the dehumidifier is communicated to the outer side of the isolation box body through a water drainage steam hole interface; the compressed air interface is connected with a compressed air storage tank.
Furthermore, a water discharge steam hole pipe of the dehumidifier is communicated to the cooling water storage tank on the outer side of the isolation box body through a water discharge steam hole interface.
Furthermore, a compressed air control solenoid valve is arranged between the compressed air interface and the compressed air storage tank.
Furthermore, the isolation box body is made of an acrylic plate, and a door edge sealing ring is arranged between the front door on the side face and the isolation box body.
Furthermore, a pressure reducing valve is arranged between the protective gas path interface and the protective gas source.
Furthermore, the protective gas port is positioned on the inner side of the isolation box body and is connected with a pressure reducing pipe, and the pipe wall of the pressure reducing pipe is provided with a plurality of through holes.
Furthermore, the keeper clamp comprises a clamp end and a buckle end, the buckle end is fixed on the isolation box body through a screw, and the clamp end is fixed on the front door on the side surface through a screw; the inner side of the isolation box body is provided with a reinforcing plate for reinforcing the installation strength of the buckle end.
Further, the system power supply is also included, and is connected with a time relay; a system main air switch is arranged between the system power supply and the time relay, an oxygen sensor air inlet pipe is connected to an oxygen sensor transmitter, the oxygen sensor transmitter is connected to the time relay, and a start/end switch is arranged between the oxygen sensor transmitter and the time relay; the oxygen sensor transmitter is connected with a double-loop controller, and the double-loop controller is connected with a time relay.
Furthermore, the protective gas control electromagnetic valve is connected to a normally open contact of the time relay, and the double-loop control instrument, the oxygen sensor transmitter, the dehumidifier and the vibration screening machine are connected to the normally closed contact of the time relay.
Furthermore, the vibrating screen classifier and the dehumidifier are connected to a power supply of a system outside the isolation box body through 5-core aviation plugs.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to an active metal powder transportation oxygen-isolation screening system, which adopts an isolation box body as a sealed vibration screening environment of a vibration screening machine, a side front door is arranged on one side of the isolation box body, the side front door and the isolation box body are sealed and locked through a bolt clamp to realize the material taking and placing, then a sensor gas path interface arranged at the upper end of the isolation box body is used for connecting an oxygen sensor gas inlet pipe, a protection gas path interface, a drainage steam hole interface and a compressed air interface are arranged on the side wall of the isolation box body adjacent to the side front door, the protection gas path interface is arranged on one side far away from the sensor gas path interface, protection gas is introduced through a protection gas source connected with the protection gas path interface, the accuracy of detecting the oxygen content of the isolation box body is ensured by the arrangement of the protection gas path interface and the oxygen, the closed-loop feedback control is carried out by the oxygen content detection sensor according to the oxygen content value, the device has a simple structure and good sealing performance, the value of the oxygen content of the internal screening is controlled by controlling the introduction of inert gas, the oxygen content value of the required environment can be set according to different working conditions of the actual metal powder, the specific value can be a range value, the internal environment can be ensured when the system works, and the oxygen content can be monitored in real time.
Furthermore, a water discharge steam hole pipe of the dehumidifier is communicated to a cooling water storage tank on the outer side of the isolation box body through a water discharge steam hole interface to collect water and prevent backflow.
Furthermore, a compressed air control electromagnetic valve is arranged between the compressed air interface and the compressed air storage tank, and the electric control is adopted, so that the device is safe and reliable, and quick in response.
Furthermore, the isolation box body adopts an acrylic plate, so that the equipment cost is low, the equipment sealing performance is good, and the maintenance cost is low.
Furthermore, a pressure reducing valve is arranged between the protective gas path interface and the protective gas source, so that the gas inlet stability is improved.
Drawings
Fig. 1 is a schematic structural diagram in an embodiment of the present invention.
Fig. 2 is a schematic view of a side front door mounting structure in the embodiment of the invention.
FIG. 3 is a schematic view of an opening position of the glove box according to an embodiment of the present invention.
In the figure, 1, a side front door; 2. a vibrating screen classifier; 3. a door edge sealing ring; 4. keeper clamp; 5. an oxygen sensor outlet; 6. an oxygen sensor; 7. an oxygen sensor air inlet pipe; 8. a sensor gas path interface; 10. a pressure reducing valve; 11. a shielding gas source; 12. a dehumidifier; 13. 5-core aviation plug; 14. protecting the gas circuit interface; 15. a protective gas control solenoid valve; 16. a drain steam hole interface; 17. a cooling water storage tank; 19. a compressed air interface; 20. a compressed air control solenoid valve; 21. a compressed air storage tank; 22. an oxygen content branch control switch; 23. a dual-loop control instrument; 24. a passive dry node; 25. an oxygen sensor transmitter; 26. a start/end switch; 27. a time relay; 28. a main power supply air switch; 29. a system power supply; 30. isolating the box body; 31. a glove box; 33. a clamp end; 34. a screw; 35. a buckle end; 36. a reinforcing plate.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the active metal powder transportation oxygen-isolation screening system comprises an isolation box body 30 and a vibration screening machine 2 arranged in the isolation box body 30, wherein a side front door 1 is arranged on one side of the isolation box body 30, and the side front door 1 and the isolation box body 30 are sealed, locked and fixed through a door bolt clamp 4; a sensor gas path interface 8 is arranged at the upper end of the isolation box body 30, the sensor gas path interface 8 is connected with an oxygen sensor gas inlet pipe 7, and an oxygen sensor 6 is arranged in the oxygen sensor gas inlet pipe 7; a protection gas path interface 14, a water vapor discharge hole interface 16 and a compressed air interface 19 are arranged on the side wall of the isolation box body 30 adjacent to the side surface front door 1, the protection gas path interface 14 is arranged on the side far away from the sensor gas path interface 8, and the protection gas path interface 14 is connected to a protection gas source 11 through a pipeline; a dehumidifier 12 is arranged in the isolation box body 30, and a water discharge steam hole pipe of the dehumidifier 12 is communicated to the outer side of the isolation box body 30 through a water discharge steam hole interface 16; the compressed air interface 19 is connected with a compressed air storage tank 21, and after screening is finished, compressed air is supplied through the compressed air storage tank 21, so that argon can be replaced rapidly, and the front side door can be opened conveniently. An oxygen sensor outlet 5 is formed in one side of the oxygen sensor air inlet pipe 7 and used for discharging gas in the isolation box body 30.
The water discharge steam hole pipe of the dehumidifier 12 is communicated to a cooling water storage tank 17 at the outer side of the isolation box body through a water discharge steam hole interface 16. A compressed air control solenoid valve 20 is provided between the compressed air connection 19 and the compressed air tank 21.
A door edge sealing ring 3 is arranged between the side front door 1 and the isolation box body 30 and used for improving the sealing performance of the isolation box body. Keep apart box 30 and adopt the ya keli board, equipment cost is lower, and crack and quick-operation joint position department all are equipped with the sealing strip and carry out sealing treatment, and equipment leakproofness is good and maintenance cost is lower. The sensor gas circuit interface 8 adopts a quick plug-in interface.
This application protective gas adopts the argon gas, and protective gas source 11 is the argon gas bottle, is convenient for remove and change safe and reliable. A pressure reducing valve 10 is arranged between the protective gas path interface 14 and the protective gas source 11 to reduce the pressure of the protective gas entering the isolation box body. The protection gas interface 14 is located the isolation box 30 inboard and is connected with the decompression pipe, and a plurality of through-holes have been seted up to the decompression pipe wall, adopt this kind of mode to admit air, can prevent effectively that inside forms the cyclone because of concentrating the air feed, and the cyclone then probably influences the screening process. The cooling water storage tank is disposed outside the isolation tank 30.
As shown in fig. 2, the isolation box body and the side front door 1 are sealed, locked and fixed through a bolt clamp 4, the bolt clamp 4 comprises a clamp end 33 and a buckle end 35, the buckle end 35 is fixed on the isolation box body 30 through a screw 34, and the clamp end 33 is fixed on the side front door 1 through a screw; the inside reinforcing plate 36 that is used for strengthening buckle end 35 installation intensity that is equipped with of isolation box 30, the side qianmen 1 inboard is equipped with the reinforcing plate 36 that is used for strengthening the installation intensity of clamp end 33, and reinforcing plate 36 adopts the ya keli board, and reinforcing plate 36 is inboard in side qianmen 1 and isolation box 30 through gluing.
The system adopts a system power supply 29, and the system power supply 29 is connected with a time relay 27; a system main air switch 28 is arranged between the system power supply 29 and the time relay 27;
the oxygen sensor 6 is used for detecting the oxygen content in the oxygen sensor air inlet pipe 7, the oxygen sensor 6 is connected with an oxygen sensor transmitter 25, the oxygen sensor transmitter 25 is connected with a time relay 27, and a start/end switch 26 is arranged between the oxygen sensor transmitter 25 and the time relay 27; the oxygen sensor transmitter 25 is connected with a double-loop controller 23, and the double-loop controller 23 is connected with a time relay 27.
The protective gas control electromagnetic valve 15 is connected with a normally open contact of the time relay 27, and the double-loop controller 23, the oxygen sensor transmitter 25, the dehumidifier 12 and the vibrating screen classifier 2 are connected with the normally closed contact of the time relay 27;
As shown in fig. 3, keep apart the box 30 lateral wall and be equipped with glove box 31, a control operation for keeping apart vibration screening machine 2 in the box 30, specifically, this application offers 6 glove boxes at the isolation box 30 lateral wall, a control screening machine, set up the screening parameter, and accomplish the transportation of active metal powder manually, operations such as packing and sealing, the butyl synthetic rubber gloves length of strong acid and alkali resistant environment of lectotype is 450mm, the cuff diameter is 160mm, inside extensible length is 400mm, adopt the regulation rubber circle to fix gloves at the gloves mounted position, see with the direction of face to the door.
Examples
This application needs to the actual production, the isolation box that sets up to correspond is connected and the system board size, L800 mm, H850 mm, it is 10mm to have adopted special binder segmentation to glue in the isolation box, length is the cubic strip of 60mm ya keli, then including the ring cloth, outer edge portion adopts special sealed glue to handle, the length from the overhanging part of door side edge is 30mm, lectotype silica gel D type sealing washer 3 is as borduring sealing strip ring cloth in overhanging part, its width is 10mm, highly be 8mm, thickness is 1.5mm, the sealing washer is installed at overhanging part intermediate position.
In order to firmly install the quick door bolt clamp, an acrylic plate with the length of 50mm, the width of 30mm and the thickness of 8mm is adhered to the inner side of the isolation box body 30 installed at the buckle end 35 through an adhesive, an acrylic plate with the length of 30mm, the width of 30mm and the thickness of 8mm is adhered to the inner side of the side front door 1 installed at the clamp end 33 through an adhesive, a peripheral connecting part is uniformly coated with a special sealant for plugging treatment to prevent leakage between a threaded hole and a gap, and the length of an M4 screw is preferably 12-15mm as a fixing bolt.
Oxygen sensor gas circuit interface 8, argon gas circuit interface 14, drainage steam hole 16 and compressed air interface 19 all adopt the 25 x 25mm square that thickness is 10mm as the cushion in the inboard and the outside for the swift interface of installation, adopt special binder to glue it respectively in the inboard and the outside of ya keli box main part, then install according to the quick-operation joint size, all connect the winding of a suitable amount raw material area soon before the installation, prevent to take place to leak because of the tiny gap.
A main power supply air switch 28 in the system is connected with a system power supply 29, the main power supply air switch 28 is closed to supply power to the system, the system starts initialization work, a time relay 27 is electrified to work, a normally open contact is closed, a protective gas control electromagnetic valve 15 is electrified and protective gas starts to be electrified, the protective gas adopts argon, the working time of the protective gas control electromagnetic valve 15 arranged by the time relay 27 is 30min, and the working time can be set according to actual working conditions; the power supplies of the double-loop controller 23, the oxygen sensor transmitter 25, the dehumidifier 12 and the vibrating screen classifier 2 are connected to the normally closed contact of the time relay, and within 30 minutes initially, the double-loop controller 23, the oxygen sensor transmitter 25, the dehumidifier 12 and the vibrating screen classifier 2 cannot be electrified to work; after the internal atmosphere initialization operation is completed for 30min, the normally open contact of the time relay 27 is disconnected, the normally closed contact is closed, the oxygen sensor starts to work after being electrified, mixed gas can synchronously enter the probe of the oxygen sensor 6 from the air inlet pipe 7 of the oxygen sensor in the process of flushing argon gas in the box body, the probe of the oxygen sensor 6 transmits data to the oxygen sensor transmitter 25, the oxygen sensor transmitter 25 can generate a corresponding 4-20mA standard signal with the measuring range of (0-21%), oxygen content data in the isolation box body is obtained at the moment, the oxygen sensor transmitter 25 comprises a passive dry node 24, the passive dry node 24 is set to be high alarm or low alarm, the normally closed contact of the passive dry node 24 is connected in series with the double-loop controller 23, the normally open contact of the double-loop controller 23 is used for controlling the compressed air control electromagnetic valve 20, the high alarm state value is set to be 20, before the actual value does not reach the set value, the power supply of the double-loop controller 23 is disconnected, the compressed air control electromagnetic valve 20 is electrified and conducted, and the double-loop controller is automatically disconnected after the compressed air control electromagnetic valve starts to work and reaches the set value. In the embodiment, magnesium powder is taken as an example, the magnesium alloy powder treatment process is carried out in a low-oxygen dry environment to avoid a series of problems of powder moisture, dust explosion and the like, which affect the printing effect and personal safety, the oxygen content of powder screening needs to be controlled below 2%, otherwise, the powder is easy to explode, therefore, a high alarm value is set to be 5000ppm and a low alarm value is set to be 3000ppm in a double-loop controller, in the actual working process, the device is initialized to work, a feedback control stage is started after argon is introduced for 30min, an oxygen sensor measures the oxygen content value in an actual box body and sends data to the double-loop controller 23, the high alarm and the low alarm of the double-loop controller are respectively connected to normally-open contacts and normally-closed contacts, and an oxygen content branch control switch 22 is connected in series to the normally-closed contact end; when the oxygen content is more than or equal to 5000ppm, the high-alarm passive relay works, normally opens and closes, normally closes and opens, protective gas is introduced, when the oxygen content is less than or equal to 3000ppm and less than 5000ppm, the low-alarm passive relay works, the normally closed end is still closed, normally opens and opens, and when the oxygen content is less than 3000ppm, screening work is started; synchronously detecting the oxygen content in the box body in the screening process, and circularly executing the process if the oxygen content is more than or equal to 5000 ppm; and (4) cutting off the idle switch after the screening process is finished, and resetting each switch so as to facilitate the next work.
This application box adopts the design of inferior gram force board material, the structure is slim and graceful and easy to maintain, it is sealed with the hot melt adhesive to adopt vacuum seal aviation plug, can avoid because of the appearance of extreme condition such as powder burning or explosion that the electric spark caused, the box, the door, fast interface and aviation plug all adopt the backing plate formula connected mode, small-size dehumidifier synchronous working when the box is inside to lead to the argon gas, when guaranteeing reasonable screening oxygen content, lower water content has also been guaranteed, prevent that the powder from appearing the condition of inefficacy because of moisture is too high.
The oxygen isolation effect is good, and the control is convenient: the system has good oxygen isolation effect, can set the environment for screening the active metal powder according to the actually required working condition, has strong adaptability, can set both high value alarm and low value alarm, can set and control the range value, can provide a longer time window for effectively screening the active metal powder, can also set single-way value control according to the actual requirement, and is simple and convenient to switch and operate; the automation degree of the initialization process, the working process and the ending process is high, and the lowest oxygen content of the system can be reduced to 400 ppm.
The use is convenient: set up 6 glove boxes at isolation box 30 lateral walls, can realize that the multidimension degree is operable, have stronger human-computer interaction nature, vibration screening machine can carry out the position rotation in inside box among the actual work process to operating personnel's better screening and the transportation operation of carrying on active metal powder.
Claims (10)
1. The active metal powder transferring oxygen-isolating screening system is characterized by comprising an isolation box body (30) and a vibration screening machine (2) arranged in the isolation box body (30), wherein a side front door (1) is arranged on one side of the isolation box body (30), and the side front door (1) and the isolation box body (30) are sealed, locked and fixed through a door bolt clamp (4); a sensor gas path interface (8) is arranged at the upper end of the isolation box body (30), the sensor gas path interface (8) is connected with an oxygen sensor gas inlet pipe (7), and an oxygen sensor (6) is arranged in the oxygen sensor gas inlet pipe (7); a protection gas path interface (14), a drainage steam hole interface (16) and a compressed air interface (19) are arranged on the side wall of the isolation box body (30) adjacent to the side front door (1), the protection gas path interface (14) is arranged on the side far away from the sensor gas path interface (8), and the protection gas path interface (14) is connected to a protection gas source (11) through a pipeline; a dehumidifier (12) is arranged in the isolation box body (30), and a water discharge steam hole pipe of the dehumidifier (12) is communicated to the outer side of the isolation box body (30) through a water discharge steam hole interface (16); the compressed air interface (19) is connected with a compressed air storage tank (21).
2. The active metal powder transporting, oxygen isolating and screening system as claimed in claim 1, wherein a water vapor discharge hole pipe of the dehumidifier (12) is communicated to a cooling water storage tank (17) outside the isolation box body through a water vapor discharge hole interface (16).
3. The active metal powder transport oxygen-barrier screening system according to claim 1, wherein a compressed air control solenoid valve (20) is provided between the compressed air port (19) and the compressed air tank (21).
4. The active metal powder transportation oxygen-isolation screening system as claimed in claim 1, wherein the isolation box body (30) is made of acrylic plates, and a door edge sealing ring (3) is arranged between the side front door (1) and the isolation box body (30).
5. The active metal powder transport oxygen-barrier screening system according to claim 1, wherein a pressure reducing valve (10) is provided between the shielding gas path interface (14) and the shielding gas source (11).
6. The active metal powder transportation oxygen-insulating screening system as claimed in claim 1, wherein the shielding gas port (14) is located on the inner side of the isolation box body (30) and is connected with a pressure reducing pipe, and a plurality of through holes are formed in the wall of the pressure reducing pipe.
7. The active metal powder transportation oxygen-isolation screening system as claimed in claim 1, wherein the bolt clamp (4) comprises a clamp end (33) and a buckle end (35), the buckle end (35) is fixed on the isolation box body (30) through a screw (34), and the clamp end (33) is fixed on the side front door (1) through a screw; the inner side of the isolation box body (30) is provided with a reinforcing plate (36) used for reinforcing the installation strength of the buckle end (35).
8. The active metal powder transport oxygen-insulating screening system according to claim 1, further comprising a system power supply (29), wherein the system power supply (29) is connected with a time relay (27); a system main air switch (28) is arranged between a system power supply (29) and a time relay (27), an oxygen sensor air inlet pipe (7) is connected to an oxygen sensor transmitter (25), the oxygen sensor transmitter (25) is connected to the time relay (27), and a start/end switch (26) is arranged between the oxygen sensor transmitter (25) and the time relay (27); the oxygen sensor transmitter (25) is connected with a double-loop controller (23), and the double-loop controller (23) is connected with a time relay (27).
9. The active metal powder transportation oxygen-insulating screening system according to claim 8, wherein the protective gas control solenoid valve (15) is connected to a normally open contact of the time relay (27), and the double-loop controller (23), the oxygen sensor transmitter (25), the dehumidifier (12) and the vibrating screening machine (2) are connected to a normally closed contact of the time relay (27).
10. The active metal powder transportation oxygen-insulation screening system as claimed in claim 8, wherein the vibration screening machine (2) and the dehumidifier (12) are connected to an external system power supply (29) of the isolation box body (30) through a 5-core aviation plug (13).
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| CN202010713457.2A CN112138989B (en) | 2020-07-22 | 2020-07-22 | Active metal powder transports oxygen screen separation screening system |
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| CN202010713457.2A CN112138989B (en) | 2020-07-22 | 2020-07-22 | Active metal powder transports oxygen screen separation screening system |
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| JP2013000705A (en) * | 2011-06-20 | 2013-01-07 | Ricoh Co Ltd | Vibration sieve device, method of manufacturing resin-containing substance, and toner for electrophotography |
| CN203853265U (en) * | 2014-01-04 | 2014-10-01 | 辽宁恒德磁业有限公司 | Closed material screening dispenser |
| CN104741311A (en) * | 2015-04-17 | 2015-07-01 | 西安欧中材料科技有限公司 | Ultrasonic vibration screen with inertia gas protection system |
| CN105170988A (en) * | 2015-09-28 | 2015-12-23 | 华南理工大学 | Method and device for recycling residual powder on metal material increase manufacturing substrate |
| CN107051865A (en) * | 2017-04-24 | 2017-08-18 | 深圳微纳增材技术有限公司 | A kind of online metal dust screening machine and method for sieving suitable for 3D printing |
| CN207823966U (en) * | 2018-01-22 | 2018-09-07 | 华南理工大学 | A kind of air-tightness powder sieving system applied to metal 3D printer |
| CN208811081U (en) * | 2018-06-21 | 2019-05-03 | 大族激光科技产业集团股份有限公司 | A kind of metal powder sieving machine |
| CN209736025U (en) * | 2019-01-29 | 2019-12-06 | 润盈生物工程（上海）有限公司 | Take gas protection structure's hierarchical shale shaker |
| CN110420854A (en) * | 2019-08-09 | 2019-11-08 | 成都先进金属材料产业技术研究院有限公司 | The method for sieving of 3D printing powder |
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