CN206688853U - Dry grinding device - Google Patents
Dry grinding device Download PDFInfo
- Publication number
- CN206688853U CN206688853U CN201720315464.0U CN201720315464U CN206688853U CN 206688853 U CN206688853 U CN 206688853U CN 201720315464 U CN201720315464 U CN 201720315464U CN 206688853 U CN206688853 U CN 206688853U
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- Prior art keywords
- powder
- receiving portion
- auxiliary gas
- outer peripheral
- peripheral face
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
- B02C23/22—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating with recirculation of material to crushing or disintegrating zone
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The utility model provides dry grinding device, and it is carried powder using compressed gas, makes powder, even if also suppressing the outer peripheral face perforation in powder receiving portion in the case of the operation and stopping of duplicating device, improve production efficiency with colliding member impacts and crushing.Dry grinding device possesses the nozzle of injection compressed gas；The accelerating tube that powder is accelerated；The impingement plate for colliding and making it to crush with powder；By the classification mechanism of the particle classifying after crushing；The powder for making not crush is deposited in the funnelform powder receiving portion around nozzle；Outer peripheral face of the auxiliary gas along nozzle is set to flow to import the auxiliary gas flow road for the powder for being piled up in powder receiving portion to the inside of accelerating tube；Surround the outer peripheral face of powder receiving portion and connected with auxiliary gas flow road and possess the assist gas chamber of auxiliary gas supply port, it is characterized in that, to be provided with cylindric cover in a manner of surrounding the outer peripheral face of powder receiving portion, auxiliary gas and the outer peripheral face direct collision of powder receiving portion of supply are not made.
Description
Technical field
The utility model is related to a kind of dry grinding device, using from the compressed gas that nozzle is blown out in the inside of accelerating tube
Powder is accelerated, powder is collided with the impingement plate set in the pulverizing chamber for be communicated to accelerating tube and crushes and obtain micro-
Powder.
Background technology
The dry grinding device of micro mist is obtained as making powder be collided with impingement plate and crushing, such as Japanese Unexamined Patent Publication can be lifted
Following dry grinding device described in flat No. 10-174896 (patent document 1), the dry grinding device is to spray gas
Mode above flow direction, which is configured with, to be sprayed the nozzle of compressed gas, powder is added in the lump with the gas sprayed from nozzle
The accelerating tube of speed and make to be mixed into powder in the gas of ejection with high velocity impact and the impingement plate that crushes, in addition, described
There is the grading rotor being classified to the micro mist after crushing on impingement plate.In the dry grinding device, not by described point
The big powder of size as defined in the ratio of level rotor classification is fallen to funnelform powder receiving portion, and by being sprayed from the nozzle
Compressed gas and import institute from the auxiliary gas that the auxiliary gas flow road of the whole outer peripheral face for being arranged at the nozzle is flowed out
State accelerating tube and crushed again.From by the assist gas chamber that is formed in a manner of surrounding the periphery surface side of the powder receiving portion to
The auxiliary gas flow road supply auxiliary gas, from the auxiliary gas supply port for the side for being arranged at the assist gas chamber to institute
State assist gas chamber supply auxiliary gas.
However, carry out frequently repeating running status and halted state in the dry grinding device described in patent document 1
In the case of such operating, it is known that the outer peripheral face of the powder receiving portion in the assist gas chamber wears, as a result
Failure as generation perforation.Therefore, it is necessary to regularly carry out replacing or the powder receiving portion of the powder receiving portion of device
The repairing of outer peripheral face, cause the decline of production efficiency.
Citation
Patent document 1：Japanese Unexamined Patent Publication 10-174896 publications
Utility model content
The utility model problem to be solved
Therefore, the purpose of this utility model is, provides a kind of following do as elimination the shortcomings that prior art
Formula reducing mechanism, it carries powder using compressed gas, makes powder with colliding member impacts and crushing, even if in duplicating device
Operation and stopping in the case of, the dry grinding device can also suppress the feelings perforated on the outer peripheral face of powder receiving portion
Condition, the time needed for maintenance can be shortened, thus improve production efficiency.
Means for solving the problems
The present inventor is based on above-mentioned purpose and had made intensive studies, as a result, having understood above-mentioned powder receiving portion
Periphery surface wear phenomenon the reason for be：When the injection of the compressed gas from nozzle and auxiliary gas flow road stops
The powder for invading assist gas chamber by auxiliary gas flow road from powder receiving portion and accumulating makes dry grinding device transport again
During row, rolled by the auxiliary gas from auxiliary gas supply port supply, so as to be connect with the powder for being opposite to auxiliary gas supply port
Collided by the outer peripheral face in portion, also, the powder with the outer peripheral face collision rift of powder receiving portion bypasses powder together with auxiliary gas
The outer peripheral face of receiving portion, the outer peripheral face of the also opposite side with aiding in gas supply port collide, and the part also produces abrasion, find logical
Cross and cylindric cover is set, to avoid auxiliary gas and the outer peripheral face of powder receiving portion from auxiliary gas supply port supply direct
Collision, so as to prevent the abrasion of the outer peripheral face of powder receiving portion, thus expects the utility model.
That is, dry grinding device of the present utility model possesses：
Nozzle, it sprays compressed gas upward；
Accelerating tube, it accelerates in the lump to powder with the compressed gas ejected from the nozzle；
Pulverizing chamber, it is connected with the accelerating tube；
Impingement plate, it is arranged in the pulverizing chamber, is collided with the powder after acceleration and is made its crushing；
Classification mechanism, it is classified to the powder after being crushed by the impingement plate, and by the powder below defined size
Body is discharged；
Funnelform powder receiving portion, it is placed around the bottom of the accelerating tube, and for passing through its inner surface
Receive the big powder of the size than as defined in, and the powder is piled up in around the nozzle；
Auxiliary gas flow road, it is arranged at the periphery of the nozzle, for making periphery of the auxiliary gas along the nozzle
Surface current moves, so as to which the powder for being piled up in the powder receiving portion is imported to the inside of the accelerating tube；And
Assist gas chamber, it surrounds the outer peripheral face of the powder receiving portion, and is connected with the auxiliary gas flow road, and
Possess auxiliary gas supply port,
Characterized in that,
It is described auxiliary gas supply port be configured to it is opposed with the outer peripheral face of the powder receiving portion,
In the assist gas chamber, to be provided with cylindric cover in a manner of surrounding the outer peripheral face of the powder receiving portion,
So as to not make the auxiliary gas and the outer peripheral face of the powder receiving portion from the auxiliary gas supply port supply directly touch
Hit.
Preferably, the cylindric cover is in the axial direction from above towards the truncated cone of lower section undergauge.
Preferably, the powder receiving portion has flange part in its bottom,
The cylindric cover is arranged to have the minimum diameter bigger than the diameter of the flange part, thus, it is possible to from described auxiliary
Gas compartment is helped to pull down.
Utility model effect
Dry grinding device of the present utility model has excellent resistance to ag(e)ing, therefore, suitable for rare earth magnet equimagnetic
The crushing of body material.
Brief description of the drawings
Fig. 1 (a) is the schematic sectional view of one for showing dry grinding device of the present utility model.
Fig. 1 (b) is the schematic sectional view shown in by the lower body part amplification of dry grinding device of the present utility model.
Fig. 2 is the schematic diagram of rotor for showing to observe from rotary shaft X-direction.
Fig. 3 is the schematic sectional view shown in by the lower body part amplification of conventional dry grinding device.
Fig. 4 (a) is the stereogram for the cylindric cover for schematically showing dry grinding device of the present utility model.
Fig. 4 (b) is the sectional view for the cylindric cover for schematically showing dry grinding device of the present utility model.
Description of reference numerals：
1 ... nozzle；
1a ... outer peripheral faces；
2 ... compressed gas；
3 ... accelerating tubes；
4 ... powders；
5 ... pulverizing chambers；
6 ... impingement plates；
6a ... lower surfaces；
7 ... classification mechanisms；
8 ... powder receiving portions；
8a, 8b ... outer peripheral face part；
8c ... flange parts；
9th, 9a ... aids in gas；
10 ... auxiliary gas flow roads；
10a ... ceilings portion；
11 ... assist gas chambers；
11a ... upper surfaces；
11b ... bottom surface sections；
12 ... auxiliary gas supply ports；
13 ... cylindric covers；
13a ... flange parts；
14 ... main bodys；
14a ... body tops；
14b ... lower body parts；
15 ... powder input ports；
16 ... grading rotors；
17 ... micro mist outlets；
18 ... supporting members；
The material of 19 ... high intensity；
20 ... pads；
21 ... blades.
Embodiment
Dry grinding device of the present utility model is using the compressed gas from nozzle blowout in the inside of accelerating tube to powder
Accelerated, the impingement plate for making powder and being set in the pulverizing chamber for be communicated to accelerating tube collides and crushes and obtain micro mist, energy
It is enough that the magnet materials such as rare earth magnet are crushed with narrower size distribution.Filled according to dry grinding of the present utility model
Put, by putting into the powder body material of the particle diameter with about 0.01~1mm, several microns~more than ten microns degree can be manufactured
Micro mist.
(1) overall structure
As shown in Fig. 1 (a) and Fig. 1 (b), dry grinding device 100 of the present utility model possesses：Nozzle 1, it sprays upward
Penetrate compressed gas 2；Accelerating tube 3, it accelerates in the lump to powder 4 with the compressed gas 2 sprayed from the nozzle 1；Powder
Broken room 5, it is connected with the accelerating tube 3；Impingement plate 6, it is arranged in the pulverizing chamber 5, is touched with the powder 4 after the acceleration
Hit and make its crushing；Classification mechanism 7, it is classified to the powder after being crushed by the impingement plate 6, size as defined in discharge with
Under powder；Funnelform powder receiving portion 8, in order to which the powder bigger than defined size is crushed again, the powder receives
Portion 8 is placed around the bottom of accelerating tube 3, for receiving the big powder by its inner surface and being piled up in the nozzle
Around 1；Auxiliary gas flow road 10, it is arranged on the periphery of nozzle 1, and in order to which the powder of the powder receiving portion 8 will be piled up in
The outer peripheral face 1a flowings that body imported into the inside of accelerating tube 3 and makes auxiliary gas 9 along the nozzle 1；And assist gas chamber
11, it surrounds the outer peripheral face of the powder receiving portion 8, and is connected with the auxiliary gas flow road 10, and possesses supply auxiliary
The auxiliary gas supply port 12 of gas 9, the auxiliary gas supply port 12 are configured to the outer peripheral face pair with the powder receiving portion 8
Put, in order to avoid the auxiliary gas 9 and the outer peripheral face of the powder receiving portion 8 that are supplied from the auxiliary gas supply port 12
Direct collision, there is the cylindrical shape to be set in a manner of surrounding the outer peripheral face of the powder receiving portion 8 in assist gas chamber 11
Cover 13.
Dry grinding device 100 of the present utility model makes the powder 4 after accelerating together with compressed gas 2 be touched with impingement plate 6
Hit and crush powder 4, and be classified using the classification mechanism 7 for the top for being arranged on pulverizing chamber 5, thus, it is possible to obtain granularity
The micro mist of narrowly distributing.Nozzle 1 is configured to, using compressor etc. by 0.5~20Nm3The compressed gas 2 of/min degree (such as is compressed
Non-active gas after air, compression etc.) blow out upward, i.e., blow out to the opposite direction of vertical, ejected from nozzle 1
Compressed gas 2 will put into from the powder input port 15 for the main body 14 for being arranged at dry grinding device 100 and fall to powder receiving portion 8
Under powder 4 roll upward, and imported to the accelerating tube 3 for the top for being arranged at nozzle 1.The powder 4 for importeding into accelerating tube 3 exists
It is accelerated in accelerating tube 3, the impingement plate together with compressed gas 2 with being set in the pulverizing chamber 5 for being communicated to the top of accelerating tube 3
6 collide and crush.
(2) main body
In an embodiment of the present utility model, the main body 14 of dry grinding device 100 includes general cylindrical shape
Body top 14a and generally conical shape lower body part 14b.It is provided with body top 14a top after being used for crushing
The classification mechanism 7 that is classified of powder, pars intermedia is provided with the powder input port 15 of the raw material for putting into powder.In master
Body bottom 14b bottom in a manner of surrounding accelerating tube 3 formed with funnelform powder receiving portion 8, the powder material after input
And not to be graded circular conical surface of the big particle of size of the classification of mechanism 7 along lower body part 14b attached in the bottom of accelerating tube 3
Proximad the sidepiece of nozzle 1 is fallen, and is temporarily piled up in funnelform powder receiving portion 8.In the inside of main body 14, with accelerating tube 4
Communicatively it is configured with the pulverizing chamber 5 including impingement plate 6.
The powder being piled up in the crushing process of powder receiving portion 8 passes through as caused by the compressed gas 2 sprayed from nozzle 1
Circulating current (arrow B~arrow E) in device and part is broken from below.Therefore, it is not susceptible to powder and rests on powder
The bottom of receiving portion 8 and block the unfavorable condition of circulating current etc., the recurrent state of powder can be maintained well.It is in addition, logical
Cross and the outer peripheral face of nozzle 1 is set to the more generally conical shape in bigger footpath on the lower, can reduce and be connect in funnelform powder
The direction of the circulating current (arrow C) declined in by portion 8 again towards nozzle 1 leading section when angle change, can be easy
Make circulating current again towards the side of nozzle 1.
Pressure sensor (not shown) can also be set inside main body 14., can be real-time by setting pressure sensor
The powder total amount of operating body interior is estimated on ground, can automatically regulate the input of the powder put into apparatus main body inside
Amount.
(3) pulverizing chamber
The impingement plate 6 is located at pulverizing chamber 5 with the state in the injection axis for the compressed gas 2 sprayed from nozzle 1
Multiple supporting members 18 of side wall support.Pass through the collision with the lower surface 6a of impingement plate 6 powder body materials collided from below
And carry out first time crushing.The impingement plate 6 preferably at least its surface is made up of the material 19 of the high intensity such as superhard or ceramic, with
Powder 4 can be made with high velocity impact and crushed.For example, it is preferable to the surface of columned stainless steel bar is covered by superhard material
Form.Rebounded with the powder of lower surface 6a collisions by lower surface 6a, by compressed gas 2 flowing and relative to injection shaft core court
Radial outside disperses, and is further collided with the inwall 5a of pulverizing chamber 5 and carries out second and crush.Pass through above-mentioned collision, powder material
Material is crushed to the particle diameter of tens microns of degree.In order to prevent the abrasion caused by the collision of powder, preferably in pulverizing chamber 5
Inwall 5a on be provided with the pad 20 being made up of the material of wear resistance.
(4) classification mechanism
As the classification mechanism 7 for the top for being arranged at impingement plate 6, for example, can preferably using it is shown in Fig. 2, have can
Around the rotator type grader of the grading rotor 16 of rotary shaft X rotations.Grading rotor 16 has multiple tabulars radially extended
Blade 21.In this case, the direction of rotation of grading rotor 16 can be the arbitrary direction in left and right.Grading rotor 16 can enter
Row reaches about 20000rpm rotation.Flat blade 21 radially arranged grading rotor 16 is shown, but blade is simultaneously in Fig. 2
It is not limited to tabular, or curved, blade 21 may be arranged as relative to radial skew.
Rotator type grader makes than defined chi when pulverized powder will be by the grading rotor 16 of high speed rotation
Very little small particle is by grading rotor 16, and main body 14 along arrow A from from micro mist outlet 17 to dry grinding device 100
Outside discharge.On the other hand, the particle bigger than defined size can not be by grading rotor 16, from arrow B along arrow C from master
Body bottom 14b circular cone is fallen towards funnelform powder receiving portion 8, and is crushed again.As shown in Fig. 1 (a), on classification
The type of rotor 16, can be the horizontal type around the rotation of horizontal shaft core, or around the vertical-type of vertical shaft core rotation.By dividing
Micro mist after level rotor 16 is classified is graded taking-up as desired by known cyclone type grader etc..
(5) gas is aided in
Input powder material and the big particle of size of the classification of mechanism 7 is not graded temporarily is piled up under main body
The powder receiving portion 8 that portion 14b is set.Powder receiving portion 8 is arranged to, and the powder is deposited near the bottom of accelerating tube 3
And the peripheral part of nozzle 1.In the bottom of powder receiving portion 8, it is provided with the periphery of the nozzle 1 for making auxiliary gas 9
The auxiliary gas flow road 10 of the ring-type flowed along the outer peripheral face 1a of nozzle 1, the auxiliary gas 9 are used to that powder receiving will to be piled up in
The powder in portion 8 imports to the inside of accelerating tube 3.Powder receiving portion 8 has flange part 8c, auxiliary gas flow road 10 in its bottom
The annular gap being preferably formed between the flange part 8c and the bottom surface sections 11b of assist gas chamber 11.Now, the flange part
8c forms the ceiling portion 10a on auxiliary gas flow road 10.The flow of auxiliary gas 9 is preferably from about 0.3~20Nm3/ min degree,
Further preferably consider suitably to set the flow of auxiliary gas 9 from the flow of the compressed gas of the ejection of nozzle 1.
In order to monitor the internal pressure of assist gas chamber 11, pressure detector can also be set (not in assist gas chamber 11
Diagram).By monitoring the internal pressure of assist gas chamber 11, the powder in the inner loop of dry grinding device 100 can be monitored
The recurrent state of body.For example, it is in stifled being piled up in the section below of powder receiving portion 8 and auxiliary gas flow road 10 as powder
When plug-like state or the state close to blocked state, the circulation of powder produces obstacle, and auxiliary gas 9 is difficult to from auxiliary gas flow road
10 flow, the pressure rise in assist gas chamber 11.In this case, reduce or stop powder body material from powder input port
15 input, untill the circulation powder amount in dry grinding device 100 is reduced.Tail off when the total amount of the powder in circulation and
During the powder amount reduction being piled up near auxiliary gas flow road 10, the flowing on auxiliary gas 9 from auxiliary gas flow road 10 becomes
Easily, the pressure in assist gas chamber 11 declines, therefore, it is possible to increase or restart powder body material from powder input port 15
Input.
(6) cylindric cover
Auxiliary gas 9 is supplied to from the auxiliary gas supply port 12 for being arranged at assist gas chamber 11 and from auxiliary gas flow road
10 flowings.In plant running, the powder of bottom of powder receiving portion 8 is piled up in by aiding in gas 9 and by continuously defeated
Deliver to accelerating tube 3.Here, in the case where the auxiliary gas 9 for making device stopping and being flowed from auxiliary gas flow road 10 stops, such as
Shown in Fig. 3, the part for being piled up in the powder of the bottom of powder receiving portion 8 invades auxiliary gas flow road 10 and auxiliary gas
Body room 11.In the case where making device run again with such state, cylindric cover 13 is not provided with assist gas chamber 11
In conventional dry grinding device (reference picture 3), the auxiliary gas 9 supplied from auxiliary gas supply port 12 will invade auxiliary gas
Body stream 10 and the powder of assist gas chamber 11 are rolled, the powder rolled and the auxiliary supplied from auxiliary gas supply port 12
Gas 9a together, is collided, to the outer peripheral face with being opposite to the outer peripheral face part 8a of powder receiving portion 8 of auxiliary gas supply port 12
Part 8a causes to damage.In addition, from the auxiliary gas 9a that auxiliary gas supply port 12 supplies also along the periphery of powder receiving portion 8
Around the opposite side of assist gas chamber 11, collide with the outer peripheral face part 8b of powder receiving portion 8, also outer peripheral face part 8b is made
Into damage.So, if the stopping of repeated several times device and running again, the outer circumferential surface section of the powder receiving portion 8 sometimes
Divide 8a, 8b lesion development, ultimately result in perforation.
As shown in Fig. 1 (a) and Fig. 1 (b), in order to avoid the auxiliary gas 9a and powder that are supplied from auxiliary gas supply port 12
The outer peripheral face direct collision of body receiving portion 8, dry grinding device 100 of the present utility model have with bag in assist gas chamber 11
Enclose the cylindric cover 13 that the mode of the outer peripheral face of powder receiving portion 8 is set.So, by setting cylindric cover 13, make from auxiliary
The auxiliary gas 9a that gas supply port 12 supplies is covering local collision 13 and that auxiliary gas supply port 12 is opposed with cylindric
Branch afterwards, and flowed along cylindrical shape 13 outer peripheral faces of cover, the opposite side of the part with being opposite to auxiliary gas supply port 12
Cylindrical shape 13 outer peripheral faces of cover collide again.In other words, the cylinder of arc surface is used as by being used on complete cycle, makes to collide cylindrical shape
The auxiliary gas 9a right branch to the left of cover 13, therefore, compared with the situation of cover is made with plane, auxiliary gas 9a stream can be made
It is dynamic scattered, thus, it is also possible to postpone 13 damages of of cylindric cover itself.
In a part for cylindric cover 13 (with the part beyond the part and its part of opposite side that supply mouth 12 is opposed)
In the case of the part that cover is not present with otch etc., auxiliary gas 9a receives from the part that cover is not present into powder
Between the outer peripheral face in portion 8 and cylindric cover 13, it is possible to outer peripheral face is damaged, it is therefore preferable that cylindric cover 13 is without otch etc.
In the absence of the part of cover.
Fig. 4 (a) and Fig. 4 (b) shows one of cylindric cover 13.Preferably drum shape cover 13 has convex in the end of a side
Edge 13a, so as to the upper surface 11a for being fixed on assist gas chamber 11 such as be threadably secured.Pass through circle as setting
Tubular cover 13, even if in the case of the operation and stopping of duplicating device, powder also will not be with the outer peripheral face of powder receiving portion 8
Part 8a, 8b direct collision, can prevent outer peripheral face part 8a, 8b damage.
Cylindrical shape cover 13 can also be in the cylindrical shape for having in the axial direction constant diameter, but preferably be in the axial direction from top
The truncated cone of undergauge downward.Now, preferred internal diameter D1 (internal diameters of the side of undergauge of the lower end of truncated cone：It is minimum
Internal diameter) than be arranged at powder receiving portion 8 bottom flange part 8c (the ceiling portion 10a on auxiliary gas flow road 10) diameter
Greatly, enable to pull down cylindric cover 13 from the assist gas chamber 11.By the way that cylindric cover 13 can be pulled down like this, make
The replacing of cylindrical shape cover 13 becomes easy, can shorten the time needed for maintenance.In order that from auxiliary gas supply port 12
Auxiliary gas 9a flowing becomes smooth, and the internal diameter D1 of the lower end of preferably drum shape cover 13 is as far as possible small.The height H of cylindrical shape cover 13
As long as there is outer peripheral face parts of the auxiliary gas 9a for avoiding making supplying from auxiliary gas supply port 12 directly with powder receiving portion 8
Length as 8a, 8b collision.Now the end portion of cylindric cover 13 can also be configured to and auxiliary gas flow road 10
The 10a connections of ceiling portion.The thickness of cylindrical shape cover 13 is not particularly limited, but preferably 0.5~5mm degree.Cylindrical shape cover 13
It is preferred that formed by stainless steel and other metal materials.
Claims (3)
1. a kind of dry grinding device, possesses：
Nozzle, it sprays compressed gas upward；
Accelerating tube, it accelerates in the lump to powder with the compressed gas ejected from the nozzle；
Pulverizing chamber, it is connected with the accelerating tube；
Impingement plate, it is arranged in the pulverizing chamber, is collided with the powder after acceleration and is made its crushing；
Classification mechanism, it is classified to the powder after being crushed by the impingement plate, and the powder below defined size is arranged
Go out；
Funnelform powder receiving portion, it is placed around the bottom of the accelerating tube, and for being received by its inner surface
The powder bigger than defined size, and the powder is piled up in around the nozzle；
Auxiliary gas flow road, it is arranged at the periphery of the nozzle, for making periphery surface current of the auxiliary gas along the nozzle
It is dynamic, so as to which the powder for being piled up in the powder receiving portion is imported to the inside of the accelerating tube；And
Assist gas chamber, it surrounds the outer peripheral face of the powder receiving portion, and is connected with the auxiliary gas flow road, and possesses
Aid in gas supply port,
Characterized in that,
It is described auxiliary gas supply port be configured to it is opposed with the outer peripheral face of the powder receiving portion,
In the assist gas chamber, to be provided with cylindric cover in a manner of surrounding the outer peripheral face of the powder receiving portion, so as to
The auxiliary gas from the auxiliary gas supply port supply and the outer peripheral face direct collision of the powder receiving portion are not made.
2. dry grinding device according to claim 1, it is characterised in that
The cylindric cover is in the axial direction from above towards the truncated cone of lower section undergauge.
3. dry grinding device according to claim 1 or 2, it is characterised in that
The powder receiving portion has flange part in its bottom,
The cylindric cover is arranged to have the minimum diameter bigger than the diameter of the flange part, thus, it is possible to from the auxiliary gas
Pull down body room.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016065762 | 2016-03-29 | ||
| JP2016-065762 | 2016-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206688853U true CN206688853U (en) | 2017-12-01 |
Family
ID=59984038
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720315464.0U Active CN206688853U (en) | 2016-03-29 | 2017-03-28 | Dry grinding device |
| CN201710195975.8A Active CN107233983B (en) | 2016-03-29 | 2017-03-28 | Dry type crushing device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710195975.8A Active CN107233983B (en) | 2016-03-29 | 2017-03-28 | Dry type crushing device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6790929B2 (en) |
| CN (2) | CN206688853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233983A (en) * | 2016-03-29 | 2017-10-10 | 日立金属株式会社 | Dry grinding device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206901B (en) * | 2020-07-24 | 2022-03-08 | 宁波可可磁业股份有限公司 | Anti-deposition airflow mill for neodymium iron boron alloy and method thereof |
| CN112058865A (en) * | 2020-08-28 | 2020-12-11 | 北京鸿成科技有限责任公司 | Energy-saving and environment-friendly solid garbage compression device and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3093158B2 (en) * | 1996-12-18 | 2000-10-03 | ホソカワミクロン株式会社 | Fine powder production equipment |
| KR101118578B1 (en) * | 2010-08-30 | 2012-02-27 | (주)제이분체 | Opposed collision type sub-micro classification and pluverization device |
| CN103341384B (en) * | 2013-07-14 | 2014-12-03 | 唐新民 | Ultrafine grinder for high hardness material |
| CN204841874U (en) * | 2015-07-07 | 2015-12-09 | 鄂州汉衍新材料有限公司 | Energy -efficient fluid energy mill |
| JP6790929B2 (en) * | 2016-03-29 | 2020-11-25 | 日立金属株式会社 | Dry crusher |
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2017
- 2017-03-10 JP JP2017045870A patent/JP6790929B2/en active Active
- 2017-03-28 CN CN201720315464.0U patent/CN206688853U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233983A (en) * | 2016-03-29 | 2017-10-10 | 日立金属株式会社 | Dry grinding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107233983B (en) | 2021-01-08 |
| JP2017177097A (en) | 2017-10-05 |
| CN107233983A (en) | 2017-10-10 |
| JP6790929B2 (en) | 2020-11-25 |
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