CN202155228U

CN202155228U - Raymond grinding mill

Info

Publication number: CN202155228U
Application number: CN2011201138839U
Authority: CN
Inventors: 刘建锋; 陈帆; 王忠利; 林宏业
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2011-04-18
Filing date: 2011-04-18
Publication date: 2012-03-07
Anticipated expiration: 2021-04-18

Abstract

The utility model provides a Raymond grinding mill, which comprises a grinding mechanism and an air classifier. The grinding mechanism consists of a shell, a feed inlet, a spindle, a quincuncial frame, grinding roller assemblies, grinding rollers, grinding rings and shovel blades, the feed inlet is arranged on the shell, the spindle is disposed in the shell, the quincuncial frame is disposed at the upper end of the spindle, the shovel blades are arranged at the lower end of the spindle, the grinding roller assemblies are connected with the spindle by the quincuncial frame, the grinding rollers are positioned on lower portions of the grinding roller assemblies, the grinding rings are disposed in the shell and correspond to the grinding rollers, air inlets are arranged below the grinding rings, and blowing devices are disposed at the air inlets. The Raymond grinding mill can effectively prevent materials to be excessively crushed and repeatedly ground, and processing yield and production efficiency of the materials are improved.

Description

A kind of raymond mill

Technical field

The utility model belongs to a kind of abrasive dust machinery, relates in particular to a kind of efficient raymond mill of producing superfine powder.

Background technology

Produce silicon carbide micro powder for linear cutting at present and generally adopt raymond mill; The operation principle of Raymond mill is: grinding roller when main axis rotation owing to action of centrifugal force is pressed on the bull ring; The perching knife that rotates with grinding roller spreads the material on the chassis between grinding roller and the bull ring, the effect that material is squeezed and mills between grinding roller and bull ring and by being pulverized.Gas flow sizing machine is equipped with in the top of mill chamber, and through the high speed rotation generation negative pressure of grading wheel, the fine powder that reaches certain grain size will be from the outlet above the grinding machine by the sucking-off mill chamber.

Raymond mill processing silicon carbide micro-powder, its yield rate is not high, only between 62%～70%, on average has the sic raw material about 35% in crushing process, excessively to be pulverized, and has formed great waste; And the productive rate of Raymond mill is also very low, is example to produce 1000 purpose micro mists, the highest can only the reaching about 70 kilograms of Raymond mill output hourly.Raymond mill processing superfine silicon carbide micro powder, why yield rate is not high with productive rate, mainly is because of the hardness of carborundum very high (Mohs' hardness 9.2); If through pulverizing once or several times, its particle diameter near but when failing to reach the particle diameter of inhaling on the grader, under the effect of gravity, can drop to again on the chassis; And can be kicked up, be sprinkling upon between grinding roller and the bull ring by perching knife once more; Repeat to pulverize, this situation tends to cause overground appearance.

The utility model content

Because material is excessively pulverized and mill to death causes the yield rate and the not high problem of production efficiency of material, the utility model provides a kind of raymond mill in order to overcome Raymond mill of the prior art.

The raymond mill of the utility model comprises milling mechanism and gas flow sizing machine, and the cavity airtight of gas flow sizing machine is connected in the top of milling mechanism cavity; Said milling mechanism comprises casing 11, feeding mouth 12, main shaft 15, plum blossom frame 17, grinding roller assembly 18, grinding roller 19, bull ring 111 and perching knife 113; Said feeding mouth is arranged on the casing; Be provided with main shaft in the casing, the main shaft upper end is provided with the plum blossom frame, and the lower end is provided with perching knife; The grinding roller assembly is connected with main shaft through the plum blossom frame; Grinding roller is positioned at the bottom of grinding roller assembly, is provided with bull ring with corresponding position, grinding roller position in the casing, and the bull ring below offers air inlet 114; Said air inlet place is provided with blowning installation 3.The below of said milling mechanism is provided with chassis 13, and the gas blow pipe 312 of said pulse gassing device extends to milling mechanism inside, and its opening is positioned at the top, chassis.Said milling mechanism inside also comprises spindle drum 14, bull ring seat 110 and relieving tool post 112; Said spindle drum is arranged on the chassis 13, is used for fixing main shaft 15; Said bull ring seat is arranged on the casing inner wall, is used for fixing bull ring 111; Said relieving tool post is arranged on the main shaft, is used for fixing perching knife 113.

The utility model has increased blowning installation on the basis of existing Raymond mill; Make perching knife can't shovel in the milling mechanism material particles and reach requirement but not the material particles through the gas flow sizing machine grading wheel blown afloat and take to the grading wheel place by the air-flow that gas blow pipe sprays; Make satisfactory material particles pass through gas flow sizing machine fast; Thereby the excessive pulverizing and the mill to death of this partial material have been avoided; Can also make the undesirable particle of residue fully contact in addition, improve the yield rate and the production efficiency of Raymond mill with grinding roller.

Description of drawings

Fig. 1 is the structural representation of a kind of raymond mill of the utility model;

Fig. 2 is the structural representation of a kind of pulse gassing device of the utility model.

The specific embodiment

Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As depicted in figs. 1 and 2; The raymond mill that the utility model provides comprises milling mechanism 1 and gas flow sizing machine 2; The cavity airtight of said gas flow sizing machine is connected in the top of milling mechanism cavity; Offer fines outlet 21 on the said gas flow sizing machine 2, the fines outlet links to each other with the material finished product collection device, and said gas flow sizing machine is conventionally known to one of skill in the art; Said milling mechanism comprises casing 11, is arranged on the feeding mouth 12 on the casing, and the chassis 13 of bottom of shell is provided with spindle drum 14; Main shaft 15 is fixed on the spindle drum, and the lower end of main shaft is provided with belt pulley 16, and belt pulley links to each other with the motor (not shown); Motor is used for the driving main shaft rotation, and the main shaft upper end is provided with plum blossom frame 17, and said plum blossom frame is used for fixing and connects grinding roller assembly 18; Grinding roller assembly lower end is provided with grinding roller 19; The number of said grinding roller is 3-6, and upwards evenly distributes in week, has guaranteed the machine run balance like this.Be provided with bull ring seat 110 with corresponding position, grinding roller position in the casing, be fixed with bull ring 111 on the bull ring seat, also be provided with relieving tool post 112 on the said main shaft, perching knife 113 is housed on the relieving tool post, said perching knife is identical with the quantity of grinding roller, and the abrasive dust of this moment is most effective.The below of said bull ring seat offers air inlet 114, is provided with blowning installation 3 at the air inlet place of milling mechanism.

Said blowning installation 3 is the pulse gassing device, and it comprises: steel tracheae 31, connection tracheae 32, high-pressure pump 33, pulse valve 34 and impulse controller 35.Said steel tracheae is connected with pulse valve, and pulse valve connects through being connected tracheae with high-pressure pump, and pulse valve is connected with the pulse valve controller signal of telecommunication.Said steel tracheae 31 comprises the tracheae 311 of annular and is communicated with it and the gas blow pipe 312 that Open Side Down.Said steel tracheae 31 is arranged between the chassis 13 and bull ring seat 110 of milling mechanism, and said gas blow pipe 312 extend into milling mechanism inside, and its opening is positioned at the top, chassis and blows to the chassis.The number of gas blow pipe 312 is 6-8, and its quantity is identical with the quantity of milling mechanism air inlet.

Said high-pressure pump is blown to milling mechanism inside through the steel tracheae; The pulse valve controller is used for the air blowing frequency of driving pulse valve and then control high-pressure pump; The every separated certain period of high-pressure pump is blown to milling mechanism; When having deposited certain material on the chassis, these materials will be blown afloat by gas blow pipe like this, meet the requirements but not the material particles through grading wheel can pass through gas flow sizing machine fast; Avoided the excessive pulverizing and the mill to death of this partial material, undesirable material can continue to be fed between grinding roller and the bull ring mills.Said high-pressure pump, pulse valve and pulse valve controller are as well known to those skilled in the art and can on market, buy.

The course of work of the raymond mill that the utility model provides is following: the belt pulley of motor drives main shaft lower end rotates; And then plum blossom frame on the drive main shaft and relieving tool post rotation; The perching knife of rotation is raised the material on the chassis between grinding roller and the bull ring, and the grinding roller assembly on the plum blossom frame rolls pulverizing to the material between grinding roller and the bull ring under action of centrifugal force; The gas flow sizing machine blade of top is done rotation at a high speed; Make the inner negative pressure that forms of Raymond mill; Carefully the fines outlet is by sucking-off from the top to certain other material of level to be pulverized the back particle diameter, and the bigger undesirable material of particle diameter drops in the effect of gravity and continues in the storehouse of milling to be kicked up by perching knife, carries out pulverizing next time; Blowning installation through side is equipped with is intermittently blown; Make to meet the requirements but can both do not blown afloat, and then, avoided the excessive pulverizing of this partial material by the gas flow sizing machine sucking-off by the fine powder of gas flow sizing machine sucking-off; Also accelerate simultaneously the speed of milling of undesirable particle, improved yield rate and production efficiency that silicon carbide micro-powder is produced widely.Raymond grinding powder machined silicon carbide micro-powder of the prior art, its substandard product all are because material is excessively pulverized more than 90%, use the raymond mill of the utility model, can make the yield rate of product reach 78%～90%; Simultaneously, because the material minimizing of processing number of times repeatedly, its productive rate also can increase, and is example to produce 1000 purpose silicon carbide micro-powders, and the productive rate of the utility model can reach 100～120 kg/per hour.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.

Claims

1. a raymond mill comprises milling mechanism (1) and gas flow sizing machine (2), and the cavity airtight of said gas flow sizing machine is connected in the top of milling mechanism cavity; Said milling mechanism comprises casing (11), feeding mouth (12), main shaft (15), plum blossom frame (17), grinding roller assembly (18), grinding roller (19), bull ring (111) and perching knife (113); Said feeding mouth is arranged on the casing; Be provided with main shaft in the casing, the main shaft upper end is provided with the plum blossom frame, and the lower end is provided with perching knife; The grinding roller assembly is connected with main shaft through the plum blossom frame; Grinding roller is positioned at the bottom of grinding roller assembly, is provided with bull ring with corresponding position, grinding roller position in the casing, and the bull ring below offers air inlet (114); It is characterized in that: said air inlet place is provided with blowning installation (3).

2. raymond mill according to claim 1 is characterized in that: said blowning installation (3) is the pulse gassing device.

3. raymond mill according to claim 2 is characterized in that: said pulse gassing device comprises: steel tracheae (31), connection tracheae (32), high-pressure pump (33), pulse valve (34) and impulse controller (35); Said steel tracheae is connected with pulse valve, and pulse valve is connected with high-pressure pump through connecting tracheae, and pulse valve also is connected with the pulse valve controller signal of telecommunication.

4. according to claim 2 or 3 described raymond mills, it is characterized in that: the steel tracheae (31) of said pulse gassing device comprises the tracheae (311) of annular and is communicated with it and the gas blow pipe (312) that Open Side Down.

5. raymond mill according to claim 4 is characterized in that: the below of said milling mechanism is provided with chassis (13), and the gas blow pipe of said pulse gassing device (312) extends to milling mechanism inside, and its opening is positioned at the top, chassis.

6. raymond mill according to claim 1 is characterized in that: offer fines outlet (21) on the said gas flow sizing machine (2).

7. raymond mill according to claim 1 is characterized in that: the number of said grinding roller is 3-6, and upwards evenly distributes in week.

8. raymond mill according to claim 7 is characterized in that: said perching knife is identical with the quantity of grinding roller.

9. raymond mill according to claim 1 is characterized in that: said milling mechanism inside also comprises spindle drum (14), bull ring seat (110) and relieving tool post (112); Said spindle drum is arranged on the chassis (13), is used for fixing main shaft (15); Said bull ring seat is arranged on the casing inner wall, is used for fixing bull ring (111); Said relieving tool post is arranged on the main shaft, is used for fixing perching knife (113).

10. raymond mill according to claim 1 is characterized in that: said main shaft (15) lower end also is provided with the belt pulley (16) that is used for the driving main shaft rotation.