CN2369763Y

CN2369763Y - Centrafugal vertical mill

Info

Publication number: CN2369763Y
Application number: CN 99230953
Authority: CN
Inventors: 朱四维
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-08
Filing date: 1999-02-08
Publication date: 2000-03-22
Anticipated expiration: 2009-02-08

Abstract

The utility model relates to a centrifugal vertical mill for the dry smashing grinding and the extra-fine grinding of hard materials such as metallic mine, non-metallic mine, etc. The centrifugal vertical mill is composed of a machine base, an air inlet chamber, a grinding chamber, a selecting chamber and an expelling chamber, wherein, the inside of the grinding chamber is provided with an impeller type horizontal turntable with a plurality of plate hammers. The inside of the selecting chamber is provided with a grading impeller. The inside of the selecting chamber is provided with a feeding device and a feed return device. The grading impeller and the turntable are respectively arranged on each special vertical type rotating shaft, and are driven by each power device. The utility model has the advantages of reasonable structure, large crushing ratio, favorable automatic grinding performance, narrow and adjustable grain diameter range of the finished product, low consumption of energy, convenient maintenance, etc.

Description

Centrifugal vertical grinder

The utility model relates to crushing and grinding machinery, and the centrifugal force that particularly utilizes material to rotatablely move carries out crushing and grinding to material, and need not to grind Jie's vertical crushing grinding machine.Be applicable to the dry type crushing and grinding of hard crisp materials such as metallic ore and nonmetallic ore.

Thereby the centrifugal force that utilizes material self makes material collide grinding mutually to be reached material is carried out crushing and grinding, is crushing and grinding technology developing direction from now on.The patent No. be ZL94202388.9's " hammerless micronizer ", the patent No. be ZL97211505.6's " pulverizer ", the patent No. be ZL97213316.X's " vertical type classification pulverizer ", the patent No. is the major technique that Chinese utility model patent such as " efficient ultra-fine grinding mill " of ZL97215401.X all successively discloses such crushing mill.The structure of such crushing mill mainly comprises material discharge chamber, separation chamber, broken mill chamber and inlet air plenum, be mounted with the classifying turbine of rotation in the separation chamber, the outlet of impeller communicates with the discharge chamber that is positioned at the separation chamber top, is mounted with the material feed arrangement on the housing of separation chamber.Being positioned at the indoor horizontal rotating disk that contains several plates hammers that is equipped with of broken mill of separation chamber below, being provided with wear-resisting lining around the broken mill chamber inner walls of rotating disk, is the annular gap between rotating disk outer rim and the wear-resisting lining.This annular gap communicates with separation chamber and inlet air plenum.Classifying turbine and rotating disk are installed in separately independently on the vertical shaft, and by separately independently power set drive.The close together of classifying turbine and rotating disk, and by the back taper separator both are kept apart.This class crushing mill of prior art has had that mills such as not using steel ball, rod iron is situated between and the advantage that can carry out crushing and grinding to harder material, and compact conformation, in light weight, floor space is little, noise is little, the ratio of reduction is big, finished product grain size can be regulated to fine grinding from small, broken bits.But weak point is that the separation chamber space is too little, there are not enough height, disturb big between the logistics, the thickness material can not flow in order, has increased energy consumption, has reduced the classification acutance, the particularly ultra-fine mill poor performance of its fine grinding performance, the product cut size distribution is also bigger, and the wearing and tearing of body are still bigger, and shortcomings such as consumable accessory inconvenience are changed in maintenance.

First purpose of the present utility model provide a kind of rational in infrastructure, energy distribution is made good use of, classification is easy to adjust effectively, finished product grain size narrowly distributing, reliable centrifugal vertical grinder.

Second purpose of the present utility model is to improve the autogenous grinding performance of centrifugal vertical grinder, particularly ultra-fine autogenous grinding performance.

First purpose of the present utility model realizes by taking following technical measures:

Centrifugal vertical grinder comprises inlet air plenum, broken chamber, separation chamber and the discharge chamber of grinding, being positioned at brokenly the indoor rotating disk that is installed on the vertical shaft that is driven by the power set of special configuration of mill is the vane type rotating disk, several plate hammers are installed on the card, broken mill chamber inner walls around rotating disk is provided with wear-resisting lining, between rotating disk outer rim and the wear-resisting lining annular gap is arranged, this annular gap communicates with separation chamber and inlet air plenum.Separation chamber is provided with material feed arrangement and material-returning device, and material-returning device is made of returning charge passage, returning charge channel entrance adjustable plate and refeed line, and the feed pipe outlet of feed arrangement and the refeed line outlet of material-returning device are positioned at the rotating disk top.Inner top is mounted with classifying turbine in separation chamber, and the outlet of impeller communicates with the discharge chamber that is positioned at separation chamber top, and impeller is installed on the vertical shaft that the power set by special configuration drive.

At second purpose of the present utility model, the utility model has been taked following technical measures:

Wear-resisting lining around the broken mill chamber inner walls setting of rotating disk is made of the removable abrasion-proof backing block of several piece, on the abrasion-proof backing block design have adjoin mutually be used to strengthen the material self-grinding can the hole groove.

In order to realize above-mentioned purpose better, the utility model has also been taked following technical measures:

Rotating disk is the vane type structure, constitutes by upper cover plate, lower cover with at the blade between the cover plate up and down, is processed with passage on the plate face of lower cover central part, and the material inlet that is positioned at upper cover plate central authorities is provided with the material separating sieve.

Hole groove on the abrasion-proof backing block has two circles at least along broken mill chamber housing body wall generatrix direction, respectively with rotating disk on the plate hammer and the leaf road of vane type rotating disk export corresponding.

Below the indoor hole groove that is positioned on rotating disk and the abrasion-proof backing block of broken mill, be provided with the annular flow positioning disk, and indoor by its Pan Kou along being placed in brokenly mill.

Rotating disk central authorities top is provided with the taper separator, and separator is installed with on housing, and its dish is sucked the outlet of following feed pipe and refeed line.

Be provided with the material screening fence of one deck at least between broken mill chamber inner walls face and the separator, fence is installed with on housing.

The wheel disc of classifying turbine and material are discharged the labyrinth sealing that is sealed between the flange of chamber, and on the impeller disk of the labyrinth seal initiating terminal of separation chamber's one side the blowback blade are set.

Broken mill chamber housing wall is the jacket type structure that available cooling medium cools off.

Be used to install the bearing block of rotating disk for be lubricated the sealing-sleeve type structure of cooling with lubricating oil.

The bearing block that is used to install classifying turbine is the jacket type structure that available cooling medium cools off.

The utility model has also been taked some other technical measures, as fragile part corresponding shell position design in the machine access door etc. is arranged.

Accompanying drawing 1 is the structural representation of the utility model most preferred embodiment.

Accompanying drawing 2 is structural representations of rotating disk.

Provide embodiment of the present utility model below in conjunction with the explanation of accompanying drawing drawing, and the utility model is described in further detail by embodiment.

Referring to accompanying drawing 1 and accompanying drawing 2, centrifugal vertical grinder integral body is vertical structure, constitute by support 19, inlet air plenum 16, broken mill chamber 30, separation chamber 7 and discharge chamber 37, electrical machinery of active force 29, inlet air plenum housing and the material slag outlet 18 that communicates with inlet air plenum are placed on the support, and the inlet air plenum housing is provided with and furthermore is the shutter 27 of access door.The housing of broken mill chamber 30 is a conic tube, and lower end and inlet air plenum housing are fixedly connected, and upper end and separation chamber's 7 housings are fixedly connected.Separation chamber's housing is a cylindrical tube.The top of separation chamber is to discharge the chamber, and its outlet is connected with strong negative pressure material collection system.

Feed arrangement and material-returning device are set on the housing of separation chamber, feed arrangement is made of hopper 5 and feed pipe, material-returning device is made of returning charge passage 35, returning charge channel entrance adjustable plate 36 and refeed line 32, and the end outside refeed line is positioned at housing is provided with the secondary air door 33 of furthermore observing door for returning charge.The outlet of feed pipe and the outlet of refeed line are positioned at the top of rotating disk card.Be provided with classifying turbine 6 in inner top central authorities of separation chamber, classifying turbine is installed on its special vertical shaft 38, and the water-cooling bearing block 2 of rotating shaft by jacket type structure is installed on separation chamber and the housing of discharging the chamber, and driven by belt gear 1 by the motor 3 of the adjustable rotating speed that is installed in the special configuration on separation chamber's housing.The 4th, the water pipe of cooling water turnover bearing block.The classifying turbine outlet communicates with the discharge chamber, the wheel disc of impeller and discharge the labyrinth seal that is sealed between the flange of chamber, and on the impeller disk of the labyrinth seal initiating terminal of separation chamber's one side, the blowback blade is set, directly enters the material collection system to prevent the material in the separation chamber.The 34th, the access door of separation chamber.

Be positioned at brokenly the indoor vane type horizontal rotating disc of mill and be installed on its special vertical shaft 21, rotating shaft is installed on the frame by the chuck bearing block 20 that is lubricated cooling by circulating lubricating oil again, and is driven by belt gear 22 by electrical machinery of active force 29.The 17th, cutting oil turnover oil pipe.The 23rd, the seal cover of bearing block.The 28th, belt tightness adjustment mechanism.Rotating disk is the vane type structure, by upper cover plate 25, lower cover 26, constitute at blade 14 and the reinforcement 41 between the cover plate up and down, blade and reinforcement lay respectively at the outer plectane face and the interior plectane face of cover plate plate face, are processed with several passages 42 at lower cover on the plate face between the reinforcement.The central part of upper cover plate is that material enters the rotating disk charging aperture of passage between cover plate up and down, and charging aperture is provided with the cage 24 that top design has separating sieve 44.43 is the rotating disk wheel hub.Be provided with 8 rotatable 90 ° plate hammer 31 at the upper face of upper cover plate, be installed on the support 39 that is fixedly arranged on the cover plate by bolt 40.Broken mill chamber housing 30 internal faces around rotating disk are provided with the wear-resisting lining that is made of the removable abrasion-proof backing block 13 of several piece, design has two circles to be used to strengthen the hole groove of material self-grinding energy on the abrasion-proof backing block, it is 31 corresponding that one circle and the plate of rotating disk are hammered into shape, and one encloses with the material outlet between the cover plate is corresponding up and down.Be the annular gap between abrasion-proof backing block and the rotating disk outer rim, this gap communicates with separation chamber and inlet air plenum.Be provided with annular flow positioning disk 15 below rotating disk and wear-resisting anti-layer, its Pan Kou and abrasion-proof backing block lower limb join, and are placed in brokenly in the housing of mill chamber by its Pan Kou.The taper separator 8 that directly over the rotating disk card, suspended, separator is installed with on the housing of broken mill chamber by outstanding support arm 9, and its dish is sucked the then outlet of feed arrangement feed pipe and material-returning device refeed line.Be provided with screening fence 10 between broken mill chamber inner walls and taper separator 8, fence has two-layer, and interlaced layout is installed with on the housing wall of broken mill chamber.Broken mill chamber housing wall is jacket structured, is filled with recirculated cooling water in the chuck, and 12 is the cooling water water inlet pipe and water outlet pipe.For the ease of the indoor quick-wear part of the broken mill of maintain and replace, broken mill chamber housing is provided with access door 11.

Operation principle of the present utility model is as follows:

Rotate at a high speed by main motor-driven rotating disk, the plate on rotating disk upper cover plate hammer and up and down the blade between the cover plate gas on the card and the gas between blade passage are rotated at a high speed with rotating disk, in action of centrifugal force, gas flows outside rotating disk mediad rotating disk, central authorities at rotating disk form low-pressure area, and the annular gap outside the rotating disk card forms the higher-pressure region.The gas that the is positioned at rotating disk central authorities space that the back forms that flows away, the gas make-up of coming by gas of coming in and backflow from inlet air plenum, feed pipe, refeed line.The plate hammer on the rotating disk card and the action of scratching of blade are used, make brokenly simultaneously the outer gas high speed rotary motion of the indoor rotating disk of mill, again because the classifying turbine of rotation is installed in case top central authorities of separation chamber, its outlet communicates with strong negative pressure material collection system, separation chamber top classification impeller eye place also is a negative pressuren zone, therefore formed in machine from the broken material that can carry that grinds chamber to separation chamber classifying turbine inlet and rotated the strong air flow that rises, classified impeller, product are discharged the chamber and are entered the product gathering system.

Material adds from the feed hopper of feed arrangement, drop down onto rotating disk upper cover plate central authorities charging aperture place through feed pipe, the material that adds generally all can not be by being set in place in the separating sieve of the charging aperture top of upper cover plate centre, fall immediately on the rotating disk card, under the drive of rotating disk card, quicken rotation, under action of centrifugal force, move to the rotating disk outer rim.Because the motion of material and rotating disk is asynchronous, material always is lower than the rotating disk movement velocity of loca, is impacted producing fragmentation for the first time by the plate tup of high-speed motion, and broken fragment rushes at abrasion-proof backing block with higher speed, is clashed into littler fragment.The fence that the material that upwards flies up is run into the top is kept off back, splashes to the tup place again and is impacted once more, is broken into the more material of small particle diameter.In addition, because the effect that the hammer of the plate on the rotating disk also has fan blade, make gas high speed strenuous exercise, the air-flow of high speed strenuous exercise carries the material impacting abrasion-proof backing block that is broken into than fine grain, and in the groove high speed eddying motion of the hole of abrasion-proof backing block, between the material of strenuous exercise and with after generation strong collision grinding between the material that pours.Because material is at repeatedly fragmentation and the grinding of the broken indoor experience of mill, broken grinding efficiency height.In addition, the material bed course that rotation forms in the groove of abrasion-proof backing block hole has also alleviated the impact wear of material to liner plate effectively.

Carry the gas of material behind the fence sub-sieve and enter brokenly the separation chamber of grinding the top, chamber, in separation chamber, rotating and rising.Because the rotating disk central area is strong negative pressuren zone, the air-flow internal layer that rotation is risen can flow to the rotating disk central area.Flow back to the rotating disk central area in order to reduce too much gas, hold concurrently refeed line to rotating disk central authorities make-up gas, i.e. secondary air by feed pipe and secondary wind inleting tube.Material is along with the air-flow rotation is risen, because action of centrifugal force, the material that particle diameter is bigger is positioned at rotation ascending air skin, and the less material of particle diameter is positioned at the internal layer of rotation ascending air.Air-flow rises to the classifying turbine place of separation chamber top rotation, and the material that reaches the product cut size requirement enters the material collection system along with along with gas enters impeller from the blade grid seam of rotary blade through discharging the chamber.The material that does not reach the product cut size requirement is kept off back by the impeller blade grid, can not enter impeller, or fall impeller below along with the air-flow that flows to rotating disk central authorities turns back to rotating disk central authorities because of the effect of gravity, or because of the impeller blade action of centrifugal force, thrown to the air-flow skin, along with rotatablely moving of air-flow enters material-returning device, turn back to rotating disk central authorities then again.In addition, the bigger material of particle diameter that rotation ascending air skin carries is pressed its particle diameter and weight size again along with air-flow rises, and successively enters the material-returning device inlet that is arranged on the housing wall, turns back to rotating disk central authorities from material-returning device.Owing in time return the thick material of not refinement, thereby reduced the amount that air-flow carries material effectively, and also reduced energy consumption effectively, the wearing and tearing of inner walls, classifying turbine blade have also been reduced simultaneously.

The material that returns from classifying turbine below and material-returning device, its particle diameter substantially can both be by the separating sieve of rotating disk upper cover plate central authorities porch, enter passage that rotating disk is made of reinforcement between the cover plate up and down and the passage that constitutes by blade subsequently, in passage, effectively quickened, dished out at a high speed from the outlet of centrifugal impeller outer rim, rush at abrasion-proof backing block, on liner plate, do strong eddying motion in the corresponding ultra-fine mill hole groove, produce fierce collision grinding at storeroom and the storeroom that pours effusion.The material major part of fine grindingization is along with the primary air motion of rotation rising, the material of small part is along with the gas that is carried by it is overflowed downwards from the annular gap between rotating disk outer rim and abrasion-proof backing block, and under the guiding that is positioned at positioning disk below the rotating disk, converge from the inlet air plenum gas of coming in, return port from the close rotating disk central authorities of rotating disk lower cover enters the runner between cover plate up and down again, carries out fine grinding once more.

The particle diameter of product material is subjected to the restriction of classifying turbine rotating speed, and different rotating speeds has the critical particle diameter of different grading, and the critical particle diameter of rotating speed high product is little, otherwise the critical particle diameter of product is then big.The particle diameter of controllable rotation speed system product thing grain by the control classifying turbine.Therefore classifying turbine is designed to its rotating speed and can regulates.

The particle diameter of product and output also are subjected to the influence of returning charge amount, rotary speed.Regulate particle diameter and output that returning charge channel entrance area can be regulated product.Inlet-duct area is big, and the feed back amount is big, and product cut size and output are little, otherwise inlet-duct area is little, and then the feed back amount is little, and the particle diameter and the output of product are big.The rotating speed height of rotating disk, fine grinding and ultra-fine mill efficient improve, and fine-graded material ratio increases in the finished product materials.The rotating speed of rotating disk is low, and fragmentation is outstanding relatively, and ablation reduces relatively, and coarsely graded material ratio increases in the finished product materials.Therefore can regulate the operating condition of grinding machine relevant apparatus according to product requirement and performance.

Compared with the prior art the utility model has following relatively more outstanding advantage:

1. the adjustable material-returning device of the utility model unique design large granular materials that gas is carried can in time return rotating disk Carry out crushing and grinding, this had both saved energy consumption, can avoid again the bigger material of particle diameter to sneak into product, had improved the product branch Class precision has also alleviated the live load of classifying turbine and the wearing and tearing that classifying turbine and separation chamber's inwall etc. are located, and prolongs Service life.

2. the specially designed crushing and grinding structure of the utility model is impacted earlier material, after be subjected to abrasion-proof backing block and grid The bump on hurdle, and then in the hole of abrasion-proof backing block groove mesoscale eddies collision grinding, namely material is subjected to the compound of broken and grinding Effect, so crushing and grinding efficient height, the autogenous grinding performance is good, and reasonable energy utilization has reduced energy consumption.

3. by the independent again mutually restriction of each governing loop of the present utility model, easy to adjust, flexible, effective, so energy Adapt to the hard broken material of different physics characteristics, comprise very hard material, product requirement has the thing of different-grain diameter scope Material dry-type pulverizing grinding and superfine grinding, effectiveness of classification height, good product quality and stablizing.

4. end plate and the labyrinth seal that is sealed into of discharging between the mounting flange of chamber on the classifying turbine of rotation seal effect Get well, and play top at labyrinth, namely on the outer wide limit, garden of end plate the blowback blade is set, stopped in the separation chamber fully Oarse-grained material enters discharges the chamber, has guaranteed Product Precision.

Passage between specially designed separator, fence, cage, cage top separating sieve, upper and lower cover plates, turn to The flow guiding disc of dish below, and the outlet of material-returning device refeed line and the technical measures such as strong negative pressuren zone is connected make the gas in the machine Stream and turnover material, thickness material flow in order, in order motion, and the phase mutual interference is little, and give full play to each ad hoc functional areas Act on, improved efficient, the performance of crushing and grinding and Ultrafine Grinding, avoided unnecessary energy consumption.

Since the grinding of material mainly betide in the material of hole groove mesoscale eddies motion of abrasion-proof backing block and the zap pit groove The mutual collision grinding of material, the material that the material pad of rotation has been avoided again bringing at a high speed directly impacts abrasion-proof backing block, and is anti-The mill liner plate has been subjected to protection, and wearing and tearing greatly reduce, and uses prolong service life, and the contamination of products degree reduces, again by All be to fix with bolt in abrasion-proof backing block plate and fence, change install very convenient.

7. the main shaft bearing adopts circulating lubricating oil lubrication structure, and classifying turbine bearing block and broken mill chamber housing adopt cold But water-cooling structure has guaranteed the bearing trouble free service, and complete machine is reliable, and long service life can be controlled brokenly again the mill chamber Temperature, therefore can adapt to different materials.

8. the many places maintenance door of offering carries out maintenance easily, saves maintenance workload and working time, makes maintenance convenient Fast.

The utility model also has the following advantages except above advantage:

Because the material crushing grinding process carries out under negative pressure, therefore not having dust leaks good work environment, movement parts Few, to overhaul with changing the easy part that decreases and easily grind part conveniently, maintenance cost and operation expense are low, and be broken than greatly, can be implemented in one In the machine from, cost of manufacture low floor space little, vibration light to superfine grinding, said device features rational structure compactness, weight in small, broken bits Little, factory building foundation requires the advantages such as low.

Claims

1. centrifugal vertical grinder, comprise inlet air plenum, broken mill chamber, separation chamber and discharge chamber, the classifying turbine that is positioned at brokenly the indoor rotating disk of mill and is positioned at separation chamber is installed in respectively on separately the vertical shaft, by power set driving separately, the rotating disk card is mounted with several plate hammers, broken mill chamber its inwall of housing around the rotating disk outer rim is provided with wear-resisting lining, be annular space between rotating disk outer rim and the wear-resisting lining, this annular space communicates with separation chamber and inlet air plenum, the classifying turbine outlet communicates with the discharge chamber, feed arrangement is placed on separation chamber's housing, it is characterized in that being provided with by the returning charge passage in separation chamber, the material-returning device that returning charge channel entrance adjustable plate and refeed line constitute, the feed pipe outlet of feed arrangement and the refeed line outlet of material-returning device all are positioned at the top of rotating disk.

2. centrifugal vertical grinder according to claim 1, it is characterized in that said rotating disk is the vane type rotating disk, constitute by upper cover plate, lower cover with at the blade between the cover plate up and down, the material inlet that is positioned at upper cover plate central authorities is provided with the material separating sieve, the plate hammer is installed on the upper cover plate plate face, is processed with passage on the plate face of lower cover central part.

3. centrifugal vertical grinder according to claim 1, it is characterized in that brokenly mill chamber inner walls face be provided with by the several piece abrasion-proof backing block constitute around rotating disk and removable wear-resisting lining, on the abrasion-proof backing block design have adjoin mutually be used to strengthen the material self-grinding can the hole groove.

4. centrifugal vertical grinder according to claim 3 is characterized in that the hole groove on the abrasion-proof backing block has two circles at least along broken mill chamber housing wall generatrix direction, respectively with rotating disk on the plate hammer and the leaf road of vane type rotating disk export corresponding.

5. according to right 1 or 2 or 3 or 4 described centrifugal vertical grinders, it is characterized in that below the hole groove on rotating disk and the abrasion-proof backing block, being provided with the annular flow positioning disk, and by its Pan Kou be placed in brokenly the mill indoor.

6. according to claim 1 or 2 or 3 or 4 described centrifugal vertical grinders, it is characterized in that being provided with the taper separator above the central authorities of rotating disk, separator is installed with on housing, and dish is sucked the outlet of following feed pipe and refeed line.

7. centrifugal vertical grinder according to claim 6 is characterized in that being provided with the material screening canopy hurdle of one deck at least between broken mill chamber inner walls face and taper separator, the canopy hurdle is installed with on housing wall.

8. according to claim 1 or 2 or 3 or 4 or 7 described centrifugal vertical grinders, it is characterized in that the wheel disc of classifying turbine and material discharge the labyrinth sealing that is sealed between the flange of chamber, and on the impeller disk of the labyrinth seal initiating terminal of separation chamber's one side, the blowback blade is set.

9. according to claim 1 or 2 or 3 or 4 or 7 described centrifugal vertical grinders, it is characterized in that brokenly that mill chamber housing wall is the jacket type structure that available cooling medium cools off.

10. according to claim 1 or 2 or 3 or 4 or 7 described centrifugal vertical grinders, the bearing block that it is characterized in that being used for installing respectively classifying turbine and rotating disk is the jacket type structure that available cooling medium cools off.