CN215613051U - High-efficient high accuracy screening plant suitable for active metal powder - Google Patents

Abstract

The utility model discloses a high-efficiency high-precision screening device suitable for active metal powder, which comprises a screening machine main body, a discharging pipe baffle, a powder collecting ring, an upper layer screen and a lower layer screen, wherein the discharging pipe is vertically fixed at the upper end of the screening machine main body, a plurality of discharging pipe baffles are fixed on the inner wall of the discharging pipe and are distributed along the vertical direction, the upper layer screen is fixed at the upper side inside the screening machine main body, the lower side screen is fixed at the lower side inside the screening machine main body, and the powder collecting ring is fixed at the lower side of the upper side screen. According to the sieve, the blanking pipe baffles are arranged in the blanking pipe of the main body of the sieve machine to reduce the impact force of metal powder on the center of the sieve, so that the sieve, particularly the center area of the sieve, is prevented from deforming and the aperture is prevented from being enlarged, and the stability of sieving granularity for a long time is ensured; the downside of first screen cloth adopts conical receipts powder ring, guarantees that the undersize thing reachs downside screen cloth center and spreads gradually to the discharge gate, has increased the motion route of powder, makes the screening more abundant, realizes the purpose of high accuracy screening.

Description

High-efficient high accuracy screening plant suitable for active metal powder

Technical Field

The utility model relates to a powder screening device, in particular to a high-efficiency high-precision screening device suitable for active metal powder, and belongs to the field of 3D material increase.

Background

The 3D printing technology is characterized in that a three-dimensional solid model is built in computer software by adopting the principle of 'dispersion and superposition', powder is melted into a molten pool by adopting a layered slicing mode through laser or electron beams, and then a product is manufactured in a cooling and layer-by-layer accumulation mode. The technology is particularly suitable for manufacturing net-shaped, hollow and customized products. Compared with the traditional technology, the 3D printing technology is gradually applied to the fields of aerospace, medical treatment, mold manufacturing and the like due to the advantages of near-net-shape, no cutting, quick response capability to complex parts, short manufacturing period and the like. The metal 3D printing is a manufacturing technology with the highest technical difficulty in 3D printing, and a printed product thereof can meet actual requirements, so that the metal 3D printing becomes a focus of controversial research of various national researchers.

The granularity of the raw material for metal 3D printing is 15-53 mu m, the proportion of less than 15 mu m is generally required to be less than 5%, the proportion of more than 53 mu m is required to be less than 15%, and the requirement on oxygen content is higher. Under the protection of argon, the raw material powder is subjected to ultrasonic rotary vibration sieve to remove particles with the particle size larger than 53 microns, and then classification is carried out to obtain the metal powder for 3D printing with the particle size of 15-53 microns. However, most of traditional domestic ultrasonic rotary vibration sieves adopt an open scheme, and adopt a manual feeding mode, which wastes time and labor. In addition, the screen is deformed due to the fact that the screen is impacted by metal powder (particularly metal powder with high density such as nickel base and cobalt base) for a long time, the aperture of a partial area, particularly a middle blanking area, is increased, the granularity of an object under the screen is gradually coarse after the screen is screened for a period of time, the oxygen content of the powder is increased due to an open screening scheme, and finally the powder cannot meet the requirement of 3D printing. Therefore, how to realize efficient and high-precision screening of active metal powder to obtain qualified particle size and low oxygen content 3D printing powder is a key problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a high-efficiency and high-precision screening device suitable for active metal powder, and solving the problems of screen deformation and aperture enlargement caused by the impact of the metal powder on a screen.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a high-efficient high accuracy screening plant suitable for active metal powder which characterized in that: contain sieve machine main part, unloading pipe baffle, receipts powder ring, upper screen cloth and lower floor's screen cloth, unloading pipe is vertical to be fixed in sieve machine main part upper end, and polylith unloading pipe baffle is fixed on the unloading inside pipe wall and distribute along vertical direction, and upper screen cloth is fixed at the inside upside of sieve machine main part, and the downside screen cloth is fixed at the inside downside of sieve machine main part, receives the downside that the powder ring was fixed at the upside screen cloth.

Furthermore, the blanking pipe baffles are arranged obliquely to the horizontal plane, the inclination angle of each blanking pipe baffle is 20-80 degrees, the blanking pipe baffles are distributed in the blanking pipe at equal intervals in the vertical direction, and the interval between every two adjacent blanking pipe baffles is 10-150 mm.

Further, the blanking pipe baffle is in a square plate shape, a triangular plate shape or an arc plate shape.

Furthermore, receive powder ring and be the toper bucket body, the diameter of the upper end of receiving the powder ring matches with the diameter of upper screen cloth and the upper end of receiving the powder ring is fixed in the downside of upper screen cloth, receives powder ring side wall and is 30-70 to shrink to the inboard and the inner wall of receiving the powder ring is smooth plane.

Further, the upper end of the discharging pipe is connected with a discharging port at the lower end of the feeding tank through a first connecting pipe, the first connecting pipe is obliquely arranged, and an electromagnetic feeder is arranged on the lower side of the first connecting pipe.

Further, the outside border of material loading jar is provided with four back shafts, and the back shaft is along the radial setting of material loading jar cross section and four back shafts are along the equidistant distribution of circumference of material loading jar, and the upper end both sides of support frame are provided with the U type notch that matches with the back shaft, and two of material loading jar are located same radial back shaft both ends card and establish in the U type notch of support frame, and the electromagnetism dispenser is fixed on the support frame.

Furthermore, the side face of the upper side containing cavity of the screening machine main body, which is located on the upper side of the first screen, is provided with a first powder outlet, the first powder outlet is connected with the first powder collecting tank through a second connecting pipe, the side face of the middle containing cavity of the screening machine main body, which is located between the first screen and the second screen, is provided with a second powder outlet, the second powder outlet is connected with the second powder collecting tank through a third connecting pipe, the side face of the lower side containing cavity of the screening machine main body, which is located on the lower side of the second screen, is provided with a third powder outlet, and the third powder outlet is connected with the third powder collecting tank through a fourth connecting pipe.

Further, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all steel wire reinforced hoses.

Further, the side face of the upper side containing cavity is connected with a vacuum pump through a hose and is provided with a vacuum pump valve on the hose, argon is introduced from an argon inlet of the first powder collecting tank, an argon outlet of the first powder collecting tank is connected with an argon inlet of the third powder collecting tank through a hose, an argon outlet of the third powder collecting tank is connected with an argon inlet of the second powder collecting tank through a hose, an argon outlet of the second powder collecting tank is connected with an argon inlet of the upper side of the screening machine main body through a hose, and argon is discharged from an argon outlet of the upper side of the screening machine main body in the screening machine main body.

Further, an oxygen detector and a vacuum gauge are arranged on the upper side of the screening machine main body.

Compared with the prior art, the utility model has the following advantages and effects:

1. according to the sieve, the blanking pipe baffles are arranged in the blanking pipe of the main body of the sieve machine to reduce the impact force of metal powder on the center of the sieve, so that the sieve, particularly the center area of the sieve, is prevented from deforming and the aperture is prevented from being enlarged, and the stability of sieving granularity for a long time is ensured; the lower side of the first screen adopts a conical powder collecting ring, so that undersize materials reach the center of the lower screen and are gradually diffused to the discharge hole, the movement path of the powder is increased, the screening is more sufficient, and the purpose of high-precision screening is realized;

2. the sieve machine main body is provided with a vacuum pump for vacuumizing the inner cavity of the sieve machine main body and filling argon for protection, and meanwhile, an oxygen detector monitors the oxygen content in the inner cavity of the sieve machine main body in the whole process to ensure the low-oxygen increment of active metal;

3. the feeding tank adopts a scheme of opening the upper part and the lower part, a vacuum butterfly valve is used for sealing, the upper end of the feeding tank is directly hoisted into the U-shaped notch at the upper end of the supporting frame through four supporting shafts which are uniformly distributed and a travelling crane, the feeding tank does not need to be turned over, time and labor are saved, and the purpose of efficient screening is realized.

Drawings

FIG. 1 is a schematic diagram of a high efficiency, high precision screening apparatus suitable for use with reactive metal powders according to the present invention.

Fig. 2 is a top view of the feed bucket of the present invention.

Detailed Description

To elaborate on technical solutions adopted by the present invention to achieve predetermined technical objects, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, it is obvious that the described embodiments are only partial embodiments of the present invention, not all embodiments, and technical means or technical features in the embodiments of the present invention may be replaced without creative efforts, and the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

As shown in fig. 1, the high-efficiency high-precision screening device suitable for active metal powder comprises a screening machine main body 1, a discharging pipe 2, a discharging pipe baffle plate 3, a powder collecting ring 4, an upper layer screen 5 and a lower layer screen 6, wherein the discharging pipe 2 is arranged along the vertical direction, the lower end of the discharging pipe 2 penetrates through the upper end center of the screening machine main body and is fixed at the upper end of the screening machine main body 1, a plurality of discharging pipe baffle plates 3 are fixed on the inner wall of the discharging pipe 2 and are distributed along the vertical direction, the upper layer screen 5 is fixed at the upper side inside the screening machine main body 1, the lower side screen 6 is fixed at the lower side inside the screening machine main body 1, and the powder collecting ring 4 is fixed at the lower side of the upper side screen 5. Metal powder gets into in the unloading pipe from unloading pipe 2 upper end to through the buffering that blocks of unloading pipe baffle 3, fall the center at upper screen cloth 5 at last, oversize from the center outwards diffusion and finally collected in first album of powder jar 13, upper screen cloth 5 undersize is concentrated through receiving powder ring 4 and is fallen to the center of lower floor's screen cloth 6, the oversize of lower floor's screen cloth 6 is from central diffusion and finally collected in second collection of powder jar 15, undersize drops to sifter main part 1 bottom and finally is collected in third collection of powder jar 17. Through set up polylith unloading pipe baffle in order to slow down the impact force of metal powder to the screen cloth center in the unloading pipe of screen frame main part, prevent the screen cloth especially the central zone's of screen cloth deformation and aperture grow, guarantee the stability of long-term screening granularity. The downside of first screen cloth adopts conical receipts powder ring, guarantees that the undersize thing reachs downside screen cloth center and spreads gradually to the discharge gate, has increased the motion route of powder, makes the screening more abundant, realizes the purpose of high accuracy screening.

The blanking pipe baffles 3 are arranged obliquely to the horizontal plane, the inclination angle of each blanking pipe baffle 3 is 20-80 degrees, the blanking pipe baffles 3 are distributed in the blanking pipe 2 at equal intervals in the vertical direction, and the interval between every two adjacent blanking pipe baffles 3 is 10-150 mm. The blanking pipe baffle 3 is in a square plate shape, a triangular plate shape or an arc plate shape.

Receive powder ring 4 and be the toper bucket body, receive the diameter of the upper end diameter of powder ring 4 and the diameter matching of upper screen cloth 5 and receive the upper end of powder ring 4 and fix the downside at upper screen cloth 5, receive that the powder ring 4 lateral wall is 30-70 and to contract to the inboard and receive the inner wall of powder ring 4 and be smooth plane.

The upper end of the blanking pipe 2 is connected with a lower end discharge hole of the charging bucket 8 through a first connecting pipe 7, the first connecting pipe 7 is obliquely arranged, and an electromagnetic feeder 9 is arranged on the lower side of the first connecting pipe 7. As shown in fig. 2, four support shafts 10 are arranged at the outer side edge of the feeding tank 8, the support shafts 10 are radially arranged along the cross section of the feeding tank 8, the four support shafts 10 are equally distributed along the circumferential direction of the feeding tank 8, U-shaped notches matched with the support shafts 10 are formed in two sides of the upper end of the support frame 11, two ends of the two support shafts 10 located in the same radial direction of the feeding tank 8 are clamped in the U-shaped notches of the support frame 11, and the electromagnetic feeder 9 is fixed on the support frame 11. The material loading bucket adopts upper and lower open-ended scheme, uses the vacuum butterfly valve to seal, and the upper end does not need the upset through four evenly distributed's back shaft and directly in the U type notch of lifting to the support frame upper end through the driving, labour saving and time saving, realizes the purpose of high-efficient screening.

The side face of the upper side containing cavity of the sieving machine main body 1, which is positioned on the upper side of the first screen 5, is provided with a first powder outlet, the first powder outlet is connected with a first powder collecting tank 13 through a second connecting pipe 12, the side face of the middle containing cavity of the sieving machine main body 1, which is positioned between the first screen 5 and the second screen 6, is provided with a second powder outlet, the second powder outlet is connected with a second powder collecting tank 15 through a third connecting pipe 14, the side face of the lower side containing cavity of the sieving machine main body 1, which is positioned on the lower side of the second screen 6, is provided with a third powder outlet, and the third powder outlet is connected with a third powder collecting tank 17 through a fourth connecting pipe 16. The second connecting pipe 12, the third connecting pipe 14 and the fourth connecting pipe 16 are all steel wire reinforced hoses.

The side face of the upper side accommodating cavity is connected with a vacuum pump 18 through a hose and is provided with a vacuum pump valve 19 on the hose, argon is introduced from an argon inlet of the first powder collecting tank 13, an argon outlet of the first powder collecting tank 13 is connected with an argon inlet of the third powder collecting tank 17 through a hose, an argon outlet of the third powder collecting tank 17 is connected with an argon inlet of the second powder collecting tank 15 through a hose, an argon outlet of the second powder collecting tank 15 is connected with an argon inlet of the upper side of the sieving machine main body 1 through a hose, and argon is discharged from an argon outlet of the upper side of the sieving machine main body 1 in the sieving machine main body 1. An oxygen measuring instrument 20 and a vacuum gauge 21 are provided on the upper side of the screen main body 1. The sieve machine main body is provided with a vacuum pump for vacuumizing the inner cavity of the sieve machine main body, argon is filled for protection, and meanwhile, the oxygen detector monitors the oxygen content in the inner cavity of the sieve machine main body in the whole process, so that the low-oxygen increment of active metal is ensured.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a high-efficient high accuracy screening plant suitable for active metal powder which characterized in that: contain sieve machine main part, unloading pipe baffle, receipts powder ring, upper screen cloth and lower floor's screen cloth, unloading pipe is vertical to be fixed in sieve machine main part upper end, and polylith unloading pipe baffle is fixed on the unloading inside pipe wall and distribute along vertical direction, and upper screen cloth is fixed at the inside upside of sieve machine main part, and the downside screen cloth is fixed at the inside downside of sieve machine main part, receives the downside that the powder ring was fixed at the upside screen cloth.

2. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: the blanking pipe baffles are arranged obliquely to the horizontal plane, the inclination angle of each blanking pipe baffle is 20-80 degrees, the blanking pipe baffles are distributed in the blanking pipe at equal intervals in the vertical direction, and the interval between every two adjacent blanking pipe baffles is 10-150 mm.

3. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 2 wherein: the blanking pipe baffle is in a square plate shape, a triangular plate shape or an arc plate shape.

4. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: receive powder ring and be the toper bucket body, receive the diameter of the upper end diameter of powder ring and the diameter of upper screen cloth and match and receive the upper end of powder ring and fix the downside at upper screen cloth, receive powder ring lateral wall and be 30-70 and to shrink to the inboard and receive the inner wall of powder ring and be smooth plane.

5. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: the upper end of the discharging pipe is connected with a discharge port at the lower end of the feeding tank through a first connecting pipe, the first connecting pipe is obliquely arranged, and an electromagnetic feeder is arranged on the lower side of the first connecting pipe.

6. A high efficiency and high accuracy screening apparatus for reactive metal powders as claimed in claim 5 wherein: the outside border of material loading jar is provided with four back shafts, and the back shaft is along the radial setting of material loading jar cross section and four back shafts distribute along the circumference equidistant of material loading jar, and the upper end both sides of support frame are provided with the U type notch that matches with the back shaft, and two of material loading jar are located same radial back shaft both ends card and establish in the U type notch of support frame, and the electromagnetism dispenser is fixed on the support frame.

7. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: the sieve machine main part is located the upside of first screen cloth upside and holds the chamber side and open and have first meal outlet, and first meal outlet is connected with first collection powder jar through the second connecting pipe, and the middle appearance chamber side that the sieve machine main part is located between first screen cloth and the second screen cloth has opened the second meal outlet, and the second meal outlet is connected with second collection powder jar through the third connecting pipe, and the downside that the sieve machine main part is located the second screen cloth downside holds the chamber side and opens and have the third meal outlet, and the third meal outlet is connected with third collection powder jar through the fourth connecting pipe.

8. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: and the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all steel wire reinforced hoses.

9. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 7 wherein: the side face of the upper side accommodating cavity is connected with a vacuum pump through a hose, a vacuum pump valve is arranged on the hose, argon is introduced from an argon inlet of the first powder collecting tank, an argon outlet of the first powder collecting tank is connected with an argon inlet of the third powder collecting tank through a hose, an argon outlet of the third powder collecting tank is connected with an argon inlet of the second powder collecting tank through a hose, an argon outlet of the second powder collecting tank is connected with an argon inlet of the upper side of the screening machine main body through a hose, and argon is discharged from an argon outlet of the upper side of the screening machine main body in the screening machine main body.

10. A high efficiency and high accuracy screening apparatus for reactive metal powders as defined in claim 1 wherein: an oxygen detector and a vacuum meter are arranged on the upper side of the screening machine main body.

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