CN202438467U

CN202438467U - Aluminum powder grading production line

Info

Publication number: CN202438467U
Application number: CN2012200701722U
Authority: CN
Inventors: 任瑞清
Original assignee: SHANDONG HUAIYUAN NEW MATERIAL EQUIPMENT CO Ltd
Current assignee: SHANDONG HUAIYUAN NEW MATERIAL EQUIPMENT CO Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-09-19
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses an aluminum powder grading production line which belongs to the technical field of solid grain grading. The aluminum powder grading production line mainly comprises a feeding device, at least two grading machines connected in series, a cyclone collector, a bag-type dust remover and a draught fan which are connected in sequence, wherein the two grading machines are provided with secondary air inlet devices; the downstream of the draught fan is connected with an air pressure balance tank; and the air pressure balance tank is provided with a nitrogen supplementing opening and is connected with the secondary air inlet device of each grading machine. The aluminum powder grading production line disclosed by the utility model solves the technical problems that during the aluminum powder grading, the grain fineness distribution is wide, the production efficiency is low, the labor intensity of workers is large, the safety of equipment operation personnel is not guaranteed in a production process, thus being widely applied to fine grading of aluminum powder.

Description

Aluminium powder classification production line

Technical field

The utility model relates to a kind of pressed powder classifying equipoment technical field, relates in particular to a kind of aluminium powder classification production line.

Background technology

Aluminium powder since have fusing point low, reach the characteristic that concentration can be exploded, especially should be noted that explosion-proofly in process of production, so the grading machinery equalization difficulty of aluminium powder is big; The original production aluminium powder is used classifying equipoment, and the grading wheel of employing is taper, can only divide elementary meal; And coarse granule control is not strict, because of the taper grading wheel under same rotating speed, different diameter line speed is different big; The rotation of grading wheel and upper casing and static position must be gapped, and as very close to each other, grading wheel can't rotate; The gap is very little, and grading wheel can be pushed stuck can't the rotation of piece that forms by aluminium powder, and the aluminum particle crowd can be out of shape the new body of generation under the external force squeezing action; Excesssive gap, classification product later just has bulky grain, and therefore traditional grader can't be realized the aluminium powder segmentation.As produce thin aluminium powder, and will use screening machine, the screening machine dust from flying causes environmental pollution, and personnel and no guarantee of device security.At present, the aluminium powder classification have that size distribution is wide, application is narrow, production efficiency is low, labor strength is big, produce in the equipment personal security and a difficult problem such as do not ensure, production cost is high, the aluminium powder quality is low.

The utility model content

The utility model technical problem to be solved is: a kind of aluminium powder classification production line is provided, have to solve the aluminium powder classification that size distribution is wide, production efficiency is low, labor strength is big, produce in the equipment personal security do not have the technical problem of guarantee.

For solving the problems of the technologies described above; The technical scheme of the utility model is: aluminium powder classification production line; Comprise the feed arrangement that connects successively, grader, cyclone collector, sack cleaner and the air-introduced machine that at least two are cascaded, be equipped with the secondary air device on described two graders, the downstream of said air-introduced machine connect the air pressure balance jar; Said air pressure balance jar is provided with nitrogen and replenishes mouth, and said air pressure balance jar all is connected with the secondary air device of described each grader.

As a kind of improvement, the top of said air pressure balance jar is provided with and is communicated with outdoor exhaust-valve.

As further improvement, described each grader, cyclone collector, sack cleaner, air-introduced machine and air pressure balance jar are equipped with static electricity earthing device.

As further improvement; Said grader comprises: the grading wheel that is installed on the body and is driven by power set; Said grading wheel is positioned at said body; Be provided with first labyrinth ring and second labyrinth ring that cooperatively interact between said grading wheel and the body, said first labyrinth ring is fixedly installed on the said body and said first labyrinth ring is provided with annular groove, and said second labyrinth ring is fixedly installed on the said grading wheel and said second labyrinth ring is provided with annular ridge; Said body is provided with inlet channel, and said inlet channel is communicated with said annular groove.

Adopted technique scheme; The beneficial effect of the utility model is: owing to designed at least two graders that are cascaded; Each grader all has independent power set to drive; Therefore the effectiveness of classification of each grader can be adjusted, obtaining narrow particle size distribution, aluminium powder that effectiveness of classification is high, and the aluminium powder of multiple purity can be obtained; Again owing between air-introduced machine and grader, designed the air pressure balance jar; Make whole production line form a closed cycle production line under nitrogen protection; Both save resource, improved environment again, and made the classification of aluminium powder realize mechanized; Reduce working strength of workers, improved production efficiency greatly.

Be communicated with outdoor exhaust-valve because the top of air pressure balance jar is provided with, make to produce in the course of the work can be expelled to the open air to the abnormal pressure of internal system timely when unusual, ensured the safe operation of whole production line.

Owing to be provided with first labyrinth ring and second labyrinth ring that cooperatively interacts between grading wheel and the body; Adopt the labyrinth seal mode between first labyrinth ring and second labyrinth ring; And designed inlet channel and be communicated with the annular groove on first labyrinth ring, made under the grading room suction function, just can produce the natural wind that flows by in the export-oriented grading room of body in the inlet channel; Both stop bulky grain and got into grading room; Realize the segmentation of aluminium powder, realized self-priming hermetic seal again, solved the movable sealing problem of grading wheel and body.

Description of drawings

Fig. 1 is the operation principle sketch map of the utility model embodiment;

Fig. 2 is the structural representation of the utility model embodiment grader;

Fig. 3 is the partial enlarged drawing of A portion among Fig. 2;

Among the figure: 1, feed arrangement, 2, first grader, 3, second grader, the 4, the 3rd grader, 5, cyclone collector; 6, sack cleaner, 7, air-introduced machine, 8, the air pressure balance jar, 9, nitrogen replenishes mouthful; 10, exhaust-valve, 11, the secondary air device, 12, body, 13, grading wheel; 14, variable-frequency motor, 15, first labyrinth ring, 16, second labyrinth ring, 17, inlet channel.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

As shown in Figure 1; A kind of aluminium powder classification production line comprises successively the feed arrangement that connects 1, at least two graders that are cascaded, cyclone collector 5, sack cleaner 6 and air-introduced machines 7, wherein; Feed arrangement 1 is preferably the conveying worm that is connected with frequency converter; Can be delivered to graded region to quantitative aluminium powder to be fractionated, frequency converter can be regulated the material amount of sending into graded region, and gas-solid ratio concentration reaches optimally sized effect in the control graded region; Be equipped with secondary air device 11 on described two graders; Secondary air device 11 is a prior art in the grader technical field, repeats no more at this, and the downstream of said air-introduced machine 7 connect air pressure balance jar 8; Said air pressure balance jar 8 is provided with nitrogen and replenishes mouth 9; Said air pressure balance jar 8 all is connected with the secondary air device 11 of described each grader, can be expelled to the open air to the abnormal pressure of internal system timely when making produce in the course of work unusual, has ensured the safe operation of whole production line; The top of said air pressure balance jar 8 is provided with and is communicated with outdoor exhaust-valve 10; And described each grader, cyclone collector 5, sack cleaner 6, air-introduced machine 7 and air pressure balance jar 8 are equipped with static electricity earthing device, and the static that the equipment that makes produces in running can in time be imported into underground, have avoided electric charge to gather producing naked light and cause when aluminium powder reaches finite concentration and explode.

Shown in Fig. 2 and Fig. 3 are common; Said grader comprises: the grading wheel 13 that is installed on the body 12 and is driven by power set; Said power set are selected variable-frequency motor 14 usually for use; Said grading wheel 13 is positioned at said body 12; Be provided with first labyrinth ring 15 and second labyrinth ring 16 that cooperatively interact between said grading wheel 13 and the body 12, said first labyrinth ring 15 is fixedly installed on the said body 12 and said first labyrinth ring 15 is provided with annular groove, and said second labyrinth ring 16 is fixedly installed on the said grading wheel 13 and said second labyrinth ring 16 is provided with annular ridge; Said body 12 is provided with inlet channel 17, and said inlet channel 17 is communicated with said annular groove.Grading wheel 13 high speed rotating, under air-introduced machine 7 effects, the grading wheel 13 inner negative pressuren zones that form; Fine powder passes grading wheel 13 and gets into negative pressuren zone, and bulky grain is thrown out of, yet owing to have the gap between grading wheel 13 and the body 12; So bulky grain possibly get into graded region through this gap, gas channel 17 is introduced negative pressuren zone with ambient atmosphere, makes bulky grain lose the power that gets into this gap; The bulky grain of stopping to know clearly gets into negative pressuren zone, has improved the purity of aluminium powder.

Its course of work is following:

Shown in Fig. 1 and Fig. 2 were common, the classification unit selected for use first grader 2, second grader 3 and the 3rd grader 4 to be composed in series, according to varigrained aluminium powder; Selected charging rate, conveying worm is sent into first grader 2 to the raw material aluminium powder, and aluminium powder fully mixes formation gas-solid fluid with the negative pressure wind that air-introduced machine 7 produces in the classification chamber; The gas-solid fluid is inhaled by negative pressure wind and is delivered to graded region, and grading wheel 13 is by variable-frequency motor 14 control rotating speed adjustable, according to the selected technology rotating speed of granularity requirements; Grading wheel 13 is changed the line of production at the drive underspin of variable-frequency motor 14 and has been given birth to centrifugal wind-force, and the gas-solid fluid that flows to second grader 3 that the different big centrifugal wind-force cutting that utilizes different rotating speed to produce is driven by negative pressure wind is because the bulky grain quality is big, centrifugal intertia force is also big; The distance that is thrown away by grading wheel 13 is as far as barrel, and the bulky grain that is thrown out of loses suction, is slipped to down storage bin with freely falling body; When bulky grain during along the downward landing of barrel, can carry the landing downwards together of parts of fine particle secretly, be slipped to slower conical tube secondary air device 11 places; Particle is dispelled under wind action, and coarse granule slides to the ground floor storage bin along conic tube, opens second layer storage bin import butterfly valve coarse granule and gets into second layer storage bin; Close second layer storage bin import butterfly valve; Open gas solid separation storehouse import butterfly valve, gas is through air filter emptying, particle pruinescence collecting packing; Fine grained returns graded region with gas-solid flow; The fine powder quality is little, and inertia force is also little, and the graded region that under the drive of negative pressure wind, passes grading wheel 13 to second graders 3 is once more by classification.Second level classification process is identical with first order classification principle, and thinner aluminium powder passes the graded region that impeller gets into the 3rd grader 4, and classification process is identical with the two-stage classification process of front; Through third level classification, fine aluminium powder gets into cyclone collector 5, is collected tube and collects; Gas is carried small fine powder secretly and is got into sack cleaner 6, filters through filter bag, and aluminium powder is collected; Gas is sent into air pressure balance jar 8 by air-introduced machine 7, and the gas in the compensator is sent in the grader by pipeline once more, repeatedly circulation; Make whole hierarchy system form closed cycle, when low or oxygen content is high when system pressure, in time replenish nitrogen.Adopt the negative-pressure operation device context not have dust from flying, adopt nitrogen protection in the system, solved the unsafe factor of equipment in running, ensured operating personnel's working environment and personal safety.

The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the utility model.

Claims

1. aluminium powder classification production line; Comprise the feed arrangement that connects successively, grader, cyclone collector, sack cleaner and the air-introduced machine that at least two are cascaded; Be equipped with the secondary air device on described two graders, it is characterized in that, the downstream of said air-introduced machine connect the air pressure balance jar; Said air pressure balance jar is provided with nitrogen and replenishes mouth, and said air pressure balance jar all is connected with the secondary air device of described each grader.

2. aluminium powder classification production line as claimed in claim 1 is characterized in that, the top of said air pressure balance jar is provided with and is communicated with outdoor exhaust-valve.

3. aluminium powder classification production line as claimed in claim 1 is characterized in that described each grader, cyclone collector, sack cleaner, air-introduced machine and air pressure balance jar are equipped with static electricity earthing device.

4. like the described aluminium powder classification of the arbitrary claim of claim 1 to 3 production line; It is characterized in that; Said grader comprises: the grading wheel that is installed on the body and is driven by power set; Said grading wheel is positioned at said body; Be provided with first labyrinth ring and second labyrinth ring that cooperatively interact between said grading wheel and the body, said first labyrinth ring is fixedly installed on the said body and said first labyrinth ring is provided with annular groove, and said second labyrinth ring is fixedly installed on the said grading wheel and said second labyrinth ring is provided with annular ridge; Said body is provided with inlet channel, and said inlet channel is communicated with said annular groove.