CN202238183U

CN202238183U - Centrifugal mill

Info

Publication number: CN202238183U
Application number: CN2011202948918U
Authority: CN
Inventors: 席玉林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-15
Filing date: 2011-08-15
Publication date: 2012-05-30
Anticipated expiration: 2021-08-15

Abstract

The utility model relates to a centrifugal mill, which is composed of a mill cylinder, a rotating shaft, a grinding body, a feeding port, a discharging port, an air vent, a driving device and the like. The grinding cylinder is fixedly connected with a device base, the rotating shaft is fixedly connected with a scraper, and the driving device drives the grinding body to perform circumferential movement on the inner wall of the mill cylinder through the scraper arranged on the rotating shaft to finish the grinding operation. Under centrifugal force, ground materials are scattered to form a material layer on the inner wall of the mill cylinder, and the grinding body has rolling and shearing functions on the material layer under the centrifugal force so as to achieve the grinding operation with high efficiency. The centrifugal mill composites the advantages of a tube mill, a Raymond mill, a vertical mill and a mixing mill, and is simple in structure, practical, reliable, capable of achieving efficiency ultrafine powder milling and suitable for the fields of chemistry, construction, medicine, foods and the like.

Description

A kind of centrifugal mill

Technical field

The utility model relates to the centrifugal grinder tool in a kind of milling equipment field, is mainly used in the grinding of block and granule materials, and the described milling equipment of the utility model combines tube mill; Raymond mill; Vertical Mill and the advantage that stirs mill, simple in structure, practicality; Reliably, can realize high efficiency superfine grinding.Be applicable to fields such as chemical industry, building materials, medicine and food.

Background technology

Grinding to solid material mainly adopts completion such as pipe mill, Vertical Mill, Raymond mill, vibromill, stirring mill on industries such as building materials, metallurgy, chemical industry, medicine and food at present; But all there are problems such as efficient is low, production capacity is little in various degree; The most frequently used tube mill energy effective utilization rate only about 2%; In order to obtain bigger production capacity, the body of a large-scale tube mill can reach the hundreds of ton, and output only has per hour more than 100 ton.

Current vertical mill production capacity commonly used is big, but complex equipments, operation and maintenance requires very high, and is bad to the adaptive capacity of the material grinding more than the medium hardness, and the production capacity of Raymond mill, vibromill, stirring mill is less, can't be applied to the big grinding operation of production capacity demand.

Grinding machine commonly used at present is when grinding fineness is had relatively high expectations, and when particularly above above 300 orders, its production capacity can reduce very big, and mill efficiency also can reduce greatly.In current grinding field, need a kind of efficient high, production capacity is big, the milling equipment that fineness is higher.

The current patent of early asking in China about the centrifugal grinder tool has a lot; With the patent art content the most approaching have two; One is " centrifugal ball mill " (application number 87105986.X), and also having one is " centrifugal mill " (application number 200620063011.5)." centrifugal ball mill " includes dispenser, and dispenser is fixed on the housing, on the working surface of housing, is provided with rib; The working surface looping gap of on the axle in housing sorter and housing being housed, inside is provided with cavity; On sidewall, be provided with a lot of through holes, in its cavity, spheroid be housed, when sorter rotates; Part spheroid interacts through through hole on the sidewall and the rib on the housing, in the cavity of sorter, reflector is housed; Constitute an annular gap with sorter; The gap is of a size of 0.1 to 1.0 of sphere diameter, and the gap between sorter and the housing working surface is 0.1 to 0.5 of a sphere diameter, and the through hole on the sorter has the shape of grooving.The ball mill rotary speed of this vertical layout is limited, and complex structure only limits to the minority field in the practical application." centrifugal mill " comprises frame and cylindrical shell, and cylindrical shell is fixed on the frame, is provided with charging aperture, is provided with discharging opening in its underpart on the top of said cylindrical shell; In said cylindrical shell, be provided with at least two layers of capstan; This capstan is installed on the main shaft, on the capstan of the said bottom, is provided with the awl liner plate and grinds ring, on the capstan of remainder layer, is provided with the awl liner plate and grinds ball; The grinding machine institute ball load of the vertical layout of this kind is very limited, other work long hours the wearing and tearing meeting of rear lining plate bigger influence mill efficiency.

The utility model content

It is high that the purpose of the utility model provides a kind of efficient, and production capacity is big, and the milling equipment of small investment comprises mill tube, rotating shaft, scraper plate, abrasive body, charging aperture, discharging opening, ventilating opening and driving arrangement.It is characterized in that: the horizontal setting of mill tube is fixedly connected with Equipment Foundations; Rotating shaft is arranged in the mill tube; The rotating shaft two ends are connected with the fixing axle sleeve in end plate centre, mill tube two ends through bearing; Rotating shaft is connected with the drive unit output shaft through its main shaft, on the centerline direction of rotating shaft upper edge, is fixedly connected with scraper plate, and scraper plate in the rotating shaft and mill tube form a plurality of cavitys; Be filled with abrasive body in the cavity, move in a circle on the mill tube inwall through the scraper plate promotion abrasive body that main shaft drives in the rotating shaft by driving arrangement.

Polished material drops in the rotating shaft in the effect of gravity, under centrifugal action after charging aperture gets into; The grinding charge material is disperseed to form the bed of material on the mill tube inwall, abrasive body is realized roll-in and shear action to the bed of material under centrifugal action, and the bed of material moves to the direction of discharging opening simultaneously; Grinding is discharged from discharging opening to the material of certain fineness; Above discharging opening, be furnished with ventilating opening, can ventilate, and take away the finished product of a part of grinding to certain fineness in grinding.

The described milling equipment of the utility model combines tube mill, Raymond mill, and Vertical Mill and the advantage that stirs mill, simple in structure, practicality, reliable, production capacity is big, can realize high efficiency superfine grinding.

For realizing above-mentioned purpose, the utility model is taked following technical scheme:

A kind of centrifugal mill; It comprises mill tube, rotating shaft, scraper plate, abrasive body, charging aperture, discharging opening, ventilating opening and driving arrangement, it is characterized in that: the horizontal setting of described mill tube is fixedly connected with Equipment Foundations, and rotating shaft is arranged in the mill tube; The rotating shaft two ends are connected with the fixing axle sleeve in end cap centre, mill tube two ends through bearing; Rotating shaft one end is connected with the driving arrangement output shaft, in the rotating shaft in mill tube, along being fixedly connected with a plurality of scraper plates on the shaft centerline direction; Scraper plate in the rotating shaft and mill tube form a plurality of cavitys as working chamber, in working chamber, are filled with abrasive body; On scraper plate, be distributed with the cloth hole near the outer end, its aperture is less than the external diameter of abrasive body; Connect the abrasive body baffle ring at scraper plate two outboard ends, described abrasive body baffle ring is vertical with shaft centerline to be arranged; Connect charging aperture in mill tube one side upper end, connect ventilating opening, lower end connection discharging opening in mill tube opposite side upper end; The scraper plate promotion abrasive body that is driven in the rotating shaft by the driving arrangement output shaft moves in a circle on the mill tube inwall.

In the embodiment of the utility model, a side contacts face and abrasive body outer surface that the inwall that contacts with material at mill tube, scraper plate promote abrasive body are provided with wearable overlay.

In the embodiment of the utility model, described a plurality of scraper plates radial equipartition in rotating shaft is connected with the rotating shaft outer surface is tangent.

In the embodiment of the utility model, described a plurality of scraper plates can also be connected with the axial socket that the rotating shaft outer surface is uniformly distributed with by radial equipartition in rotating shaft.

In the embodiment of the utility model, the middle part of rotating shaft is furnished with feed separation and finedraw that passes through or through hole perpendicular to the partition panel that is connected with circular plate shape on the shaft centerline direction on the partition panel in mill tube;

In the embodiment of the utility model; Described filling abrasive body is common or the rod iron of alloy material, steel ball, forging and porcelain ball, corundum ball abrasive body commonly used, in different rotating shafts and the formed working chamber of mill tube, doses by abrasive body profile and weight symmetry; Fill the abrasive body of difformity and weight in the both sides of partition panel.

In the embodiment of the utility model, the outer rim indention of described scraper plate plays the effect that material is loosened and stirs.

In the embodiment of the utility model, the inwall that contacts with material at mill tube can be provided with fixing liner plate, and a side contacts face that promotes abrasive body at scraper plate also can be provided with liner plate, and rod iron abrasive body outer surface is provided with wearable overlay.Mill tube or scraper plate working face can effectively reduce the equipment noise when adopting rubber lining, reduce wear.

In the embodiment of the utility model, described liner plate adopts organic material or inorganic material.

In the embodiment of the utility model, described organic material adopts abrasive rubber, polyurethane, synthetic resin, and inorganic material has alloy material, magnetic steel plate, wear-resisting steel plate, pottery, devitrified glass, cast stone.

In the embodiment of the utility model, shaft centerline and mill tube center line have eccentric throw.Its effect is; Scraper plate and abrasive body when rotating the mill tube center is eccentric along with rotating shaft, make abrasive body be reciprocal face contact to the contact of scraper plate when grinding material; Can avoid the line contact of abrasive body (like the rod iron abrasive body) to scraper plate; Become the face contact and enlarge, can improve the scraper plate life-span, prolong the service time of scraper plate.

At first adopt a fixing mill tube, mill tube is generally circle, and the mill tube inwall carries out hardfacing; To reduce wearing and tearing, at the mill tube center rotating shaft is installed, rotating shaft is connected with mill tube two ends end cap through bearing; Scraper plate is fixed in the rotating shaft, and abrasive body is filled in the working chamber of many group scraper plates and the formation of mill tube inwall, on the mill tube end cap, charging aperture is installed; Discharging opening and ventilating opening; Drive scraper plate by rotating shaft and promote the abrasive body completion grinding operation that on the mill tube inwall, moves in a circle, under centrifugal action, the grinding charge material is disperseed to form the bed of material on the mill tube inwall; Abrasive body is realized roll-in and shear action to the bed of material under very big centrifugal action, thereby realizes high efficiency grinding operation.

Next is to utilize centrifugal force to make abrasive body produce the pressure that surpasses gravity far away; Can reach more than 10 times of gravity; General nearly 6 or the above scraper plate of in a rotating shaft, being equipped with; Adopt the rod iron abrasive body, can adorn 6 the above abrasive body of multiple, abrasive body under huge centrifugal action to the bed of material repeatedly and roll-in fast and shearing; Its grinding area and impact number of times are all far above tube mill, Vertical Mill and Raymond mill, so it has than higher efficient and fineness and investments still less of milling equipment such as pipe mill commonly used now, Vertical Mill, Raymond mills.

Because abrasive body is main with roll-in on the mill tube inwall, with the effect of scraper plate be main mainly with fricting shearing, under the high speed centrifugation effect; The bed of material is swept by scraper plate, between feeding abrasive body and the scraper plate, has not only reduced the wearing and tearing of abrasive body and scraper plate; Also strengthened grinding to material; Material through shear action gets into next working chamber again through the cloth hole on the scraper plate, under the action of the centrifugal, realizes better layering and separates; Thick particle forms the metastable bed of material to the skin motion more easily, so also helps abrasive body and keeps high efficiency abrasive action.

The purpose of the utility model and solve its technical problem and can also adopt following technical measures to come further to realize.

Be distributed with baffle ring in mill tube inside strake outer end, the space of abrasive body is limited, prevent that abrasive body from getting into the destruction of causing the countershaft gyration in the space between mill tube end plate and the rotating shaft.

Upwards be furnished with the partition panel of circular plate shape perpendicular to its shaft centerline and footpath in the middle part of its many group scraper plates; Fill the abrasive body of difformity and weight in the both sides of partition panel, can load rod iron as abrasive body, play elementary grinding effect in preceding storehouse; In back storehouse mixed packing steel ball and forging as abrasive body; Then have to be similar to the grinding effect that stirs mill, but compare with stirring mill, the power that is consumed is much smaller.

Shaft bearing adopts mill tube to arrange outward, does not have bearing and other flimsy precise part in the mill tube, has avoided pollution and the damage of the interior dust of grinding machine for precise parts such as bearings.

In actual production, except the mill tube inwall, for big abrasive body outer surface, the promotion face of scraper plate carries out hardfacing after wearing and tearing repairs and handles, thereby prolonging the replacing time of changing wearing terrain reduces maintenance and maintenance cost.

The utility model compared with prior art has tangible advantage:

Many groups abrasive body in fixing mill tube is under action of centrifugal force; Repeatedly with roll-in and the shear action of Rapid Realization to the bed of material; Impact number of times to the bed of material is compared a high at least one magnitude in equal time with the roll-in area than tube mill with Vertical Mill and Raymond mill, therefore have higher mill efficiency.

Get into material in the fixing mill tube under the induced effect of scraper plate, the formation certain speed is under action of centrifugal force; Automatically form and have the big and little bed of material of inner ring particle diameter of outer ring particle diameter; And effectively raising grinding efficiency, scraper plate is near the mill tube inwall, between the material feeding scraper plate and abrasive body that sweeps; Form a bed of material, reduced the contact wear of scraper plate and abrasive body.

The grinding machine of above structure and technology not only has higher mill efficiency and better product fineness, and has lower investment and keep in repair more easily and operate.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the schematic cross-section of the centrifugal mill embodiment 1 of the utility model in the grinding machine centre.

Fig. 3 is the schematic cross-section of the centrifugal mill embodiment 2 of the utility model in the grinding machine centre.

Fig. 4 is the abrasive body baffle ring sketch map of the centrifugal mill of the utility model.

Fig. 5 is the scraper plate sketch map of the centrifugal mill of the utility model.

Reference numeral: 1, drive motors, 2, rotating shaft, 3, charging aperture, 4, mill tube, 5, partition panel, 6, abrasive body; 7, mill tube end cap, 8, ventilating opening, 9, discharging opening, 10, the abrasive body baffle ring, 11, scraper plate; 12, axle sleeve, 13, bearing, 14, plant bottom case, 15, grinding mill barrel inwall wearable overlay, 16, the scraper plate wearable overlay; 17, abrasive body wearable overlay, 18, the cloth hole, 19, working chamber, 20, zigzag, 21, fan-shaped strip hole.

The specific embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, shown in Figure 4: a kind of centrifugal mill; It comprises mill tube 4, rotating shaft 2, scraper plate 11, abrasive body 6, charging aperture 3, discharging opening 9, ventilating opening 8 and drive motors 1; Described mill tube 4 horizontal settings are fixedly connected with plant bottom case 14; Rotating shaft 2 is arranged in the mill tube 4, and rotating shaft 2 two ends are connected with the fixing axle sleeve 12 in end cap 7 centres, mill tube two ends through bearing 13, and rotating shaft 2 one ends are connected through shaft coupling with the drive motors output shaft; In the rotating shaft 2 in mill tube 4; Along being fixedly connected with a plurality of scraper plates 11 (present embodiment is 6 scraper plates) on the shaft centerline direction, scraper plate in the rotating shaft 2 and mill tube form a plurality of cavitys as working chamber 19, in working chamber 19, are filled with abrasive body 6; On scraper plate near the outer end be distributed with one arrange the material hole 18, its aperture is less than the external diameter of abrasive body; The middle part of rotating shaft is furnished with feed separation and the finedraw that passes through or through hole 5 perpendicular to the partition panel 5 that is connected with circular plate shape on the shaft centerline direction on the partition panel 5 in mill tube; Connect charging aperture 3 in mill tube one side upper end, connect ventilating opening 8, lower end connection discharging opening 9 in mill tube opposite side upper end; The scraper plate 11 promotion abrasive bodies 6 that driven in the rotating shaft 2 by drive motors 1 output shaft move in a circle on the mill tube inwall, and material is ground.

The inwall that contacts with material at mill tube 4 is provided with that a side contacts face that grinding mill barrel inwall wearable overlay 15, scraper plate promote abrasive body is provided with scraper plate wearable overlay 16 and rod iron abrasive body outer surface is provided with wearable overlay 17.

Referring to shown in Figure 2: 6 scraper plates radial equipartition and the rotating shaft outer surface is tangent is welded to connect in rotating shaft 2.

Referring to shown in Figure 3: 6 scraper plates radial equipartition in rotating shaft is connected with the axial socket that the rotating shaft outer surface is uniformly distributed with.

Connect abrasive body baffle ring 10 at scraper plate two outboard ends, this abrasive body baffle ring 10 is the grid type structure, is laid with radial fan-shaped strip hole 21 near centre bore, and described abrasive body baffle ring 10 is vertical with shaft centerline to be arranged;

Described filling abrasive body 6 is common or abrasive bodies commonly used such as the rod iron of alloy material, steel ball, forging and porcelain ball, corundum ball, in different rotating shafts and the formed working chamber 19 of mill tube, doses by abrasive body profile and weight symmetry; Fill the abrasive body of difformity and weight in the both sides of partition panel 5.

In the embodiment of the utility model, the outer rim indention 20 of described scraper plate 11.

In the embodiment of the utility model, the inwall that contacts with material at mill tube is provided with fixing liner plate, and a side contacts face that promotes abrasive body at scraper plate is provided with liner plate, and adopting liner plate is for equipment reduces noise, reduces wear.

In the embodiment of the utility model, described liner plate adopts organic friction material or inorganic high-abrasive material.

In the embodiment of the utility model, described organic friction material adopts abrasive rubber, polyurethane, synthetic resin, and inorganic high-abrasive material adopts alloy material, magnetic steel plate, wear-resisting steel plate, alloy material, pottery, devitrified glass, cast stone.

In practical application, the external part of the rotating shaft 2 of grinding machine can adopt shaft joint to be connected with drive motors 1, and abrasive body 6 adopts rod iron, and mill tube 4, abrasive body 6, scraper plate 11 all adopt hardfacing to handle.

In this centrifugal mill, adopt 6 scraper plates to form 6 groups of cavitys, and be added with partition panel 5 as working chamber; Be equipped with on the partition panel and illustrate among the figure that through hole is arranged, on scraper plate, have a plurality of through holes arranged side by side 18, the direction of rotation (see figure 2) of the rotating shaft of meaning shown in figure; Position at perpendicular bisector; When scraper plate promoted the abrasive body rotation, scraper plate and perpendicular bisector had an offset distance, and this offset distance is greater than the radius of hard grind body; This skew can reduce scraper plate 11 for the active force on the abrasive body, and can reduce wear.

In the embodiment of the utility model, shaft centerline and mill tube center line have eccentric throw, form eccentric throw; As: adopt the rod iron abrasive body; Shaft centerline is compared downward off-centre with the mill tube center line, and scraper plate lower end and the mill tube inwall of bottom is gapped in the mill tube, the scraper plate upper end that makes the mill tube internal upper part and mill tube inwall have eccentric throw and gap and; After the arranged off-centre of shaft centerline and mill tube center line, its eccentric throw and gap be radius less than abrasive body; Its effect is; Scraper plate and abrasive body when rotating the mill tube center is eccentric along with rotating shaft, make abrasive body be reciprocal up and down face contact to the contact of scraper plate when grinding material; Can avoid the line contact of abrasive body to scraper plate; Become the face contact and enlarge, can improve the scraper plate life-span, prolong the service time of scraper plate.

Polished material drops in the rotating shaft 2 in the effect of gravity, under centrifugal action after charging aperture 3 gets into; The grinding charge material is disperseed to form the bed of material on mill tube 4 inwalls, abrasive body 6 is realized roll-in and shear action to the bed of material under centrifugal action, in the back of abrasive body 6; Scraper plate 11 sweeps the bed of material; Between feeding abrasive body 6 and the scraper plate 11, after the hole 18 on the scraper plate gets into next working chamber, under action of centrifugal force, form the new bed of material through grinding.In next working chamber through the abrasive body roll-in with shear after; Swept once more by scraper plate 11 again, feed in the middle of next group abrasive body 6 and the scraper plate 11, through grinding after the hole 18 on the scraper plate for the second time; Get into next working chamber again; So back and forth, rotating shaft whenever rotates a circle, and abrasive body 6 carries out 6 roll-ins and shear action.When abrasive body 6 is accomplished roll-in and shear action; The bed of material moves to the direction of discharging opening, and grinding is discharged from discharging opening 9 to the material of certain fineness, above discharging opening, is furnished with ventilating opening 8; Can ventilate in grinding, and take away the finished product of a part of grinding to certain fineness.

The foregoing description has well embodied the content of the centrifugal mill that the utility model provided, and through the runtime verification of physical device, this centrifugal mill not only surpasses the mill efficiency of current tube mill; Than Raymond mill, Vertical Mill etc. are taller to be gone out more than 30%, simultaneously; Fineness also can be carried out better controlled; The fineness of product has surpassed tube mill, and is in the time of Vertical Mill and Raymond mill, that output descends and few.

This centrifugal mill not only has reduced investment, and operating cost is low, and maintenance and safeguard simply, has possessed the condition of large-scale promotion at present, all can significantly improve in the benefit aspect economic benefit and the environmental protection.

Claims

1. centrifugal mill; It comprises mill tube, rotating shaft, scraper plate, abrasive body, charging aperture, discharging opening, ventilating opening and driving arrangement, it is characterized in that: the horizontal setting of described mill tube is fixedly connected with Equipment Foundations, and rotating shaft is arranged in the mill tube; The rotating shaft two ends are connected with the fixing axle sleeve in end cap centre, mill tube two ends through bearing; Rotating shaft one end is connected with the driving arrangement output shaft, in the rotating shaft in mill tube, along being fixedly connected with a plurality of scraper plates on the shaft centerline direction; Scraper plate in the rotating shaft and mill tube form a plurality of cavitys as working chamber, in working chamber, are filled with abrasive body; On scraper plate, be distributed with the cloth hole near the outer end, its aperture is less than the external diameter of abrasive body; Connect the abrasive body baffle ring at scraper plate two outboard ends, described abrasive body baffle ring is vertical with shaft centerline to be arranged; Connect charging aperture in mill tube one side upper end, connect ventilating opening, lower end connection discharging opening in mill tube opposite side upper end; The scraper plate promotion abrasive body that is driven in the rotating shaft by the driving arrangement output shaft moves in a circle on the mill tube inwall.

2. centrifugal mill according to claim 1 is characterized in that: the side contacts face that the inwall that contacts with material at mill tube, scraper plate promote abrasive body is provided with wearable overlay.

3. centrifugal mill according to claim 1 is characterized in that: described a plurality of scraper plates radial equipartition in rotating shaft is connected with the rotating shaft outer surface is tangent.

4. centrifugal mill according to claim 1 is characterized in that: described a plurality of scraper plates radial equipartition in rotating shaft is connected with the axial socket that the rotating shaft outer surface is uniformly distributed with.

5. according to claim 3 or 4 described centrifugal mills, it is characterized in that: the middle part of rotating shaft is furnished with feed separation and finedraw that passes through or through hole perpendicular to the partition panel that is connected with circular plate shape on the shaft centerline direction on the partition panel in mill tube.

6. centrifugal mill according to claim 5; It is characterized in that: the rod iron that described filling abrasive body is the alloy material, steel ball, forging and porcelain ball, corundum ball abrasive body commonly used, in different rotating shafts and the formed space of mill tube working chamber, dose by abrasive body profile and weight symmetry; In the working chamber of the both sides of partition panel, fill the abrasive body of difformity and weight.

7. centrifugal mill according to claim 1 is characterized in that: the outer rim indention of described scraper plate.

8. centrifugal mill according to claim 1 is characterized in that: the inwall that contacts with material at mill tube is provided with fixing liner plate, and a side contacts face that promotes abrasive body at scraper plate is provided with liner plate, and liner plate adopts inorganic or organic friction material.

9. centrifugal mill according to claim 8 is characterized in that: described organic friction material adopts abrasive rubber, polyurethane, synthetic resin, and inorganic high-abrasive material has alloy material, magnetic steel plate, wear-resisting steel plate, pottery, devitrified glass, cast stone.

10. centrifugal mill according to claim 1 is characterized in that: shaft centerline and mill tube center line have eccentric throw.