Grind Vertical Mill
The present invention relates to a kind of grinding that is applied to cement, building materials, metallurgy, electric power and chemical industry grinding (the double grinding of oven dry) and other material.
Vertical Mill is mainly used in the grinding of cement raw material, cement, coal and slag, and it provides raw material endlessly for the production of factory, so its cycle of operation must be grown and fault rate is low, this is just so that each modular construction of Vertical Mill must be sturdy and durable.Most domestic Vertical Mill structure mostly is cast-in-block plane mill at present, be in operation and have following problem: the 1) rotation along with mill in when normal operation, the impact that raw material is subject to centrifugal force disperses at mill, but owing to be the plane mill, raw material skewness on this mill causes that the thickness of feed layer at each position differs on the mill, is easy to cause Vertical Mill master motor load to increase and makes whole vertical mill system stop jumping; 2) owing to be the plane mill, when grinding, the grinding track of grinding roller is vertical with mill, so that grinding roller and mill gap are less, has strengthened the contact-making surface aggravation mill of grinding roller and mill and the wearing and tearing of grinding roller in the situation of bed of material skewness.
Summary of the invention
Because what Vertical Mill ground mostly is cement slurry, grog, coal and slag etc., and these raw materials are very hard, long-time running is larger to the degree of wear of equipment associated components, and it is low therefore to design a kind of wearing and tearing, and high efficiency is overhauled easily Vertical Mill structure.
To achieve these goals, the technical solution used in the present invention is: grind the Vertical Mill body and be fixed on the concrete foundation, mill is driven by rotating power source and level places the Vertical Mill bottom, there is the blanking gap between described mill and the Vertical Mill inner body wall, the non-milling zone in described mill center is the taper that raises up, the edge grinding district is the cambered surface that outwards raises gradually, grinding roller by the Vertical Mill side stretch to mill milling zone top and oblique have a down dip fixing.
The rocking arm outer end of described grinding roller is fixed on the supporting revolving shaft seat, and is connected with upset hydraulic cylinder on being fixed in concrete foundation by connecting rod.
Described supporting revolving shaft seat is connected with interstitial fluid cylinder pressure on being fixed in concrete foundation.
The described Vertical Mill body fixedly top in grinding roller zone is provided with the upset access door, when described grinding roller is positioned at the Vertical Mill body, is provided with the sealing canvas between its rocking arm and upset access door, the Vertical Mill body.
Described mill milling zone outer is fixed with a circle blocking material ring.
The Vertical Mill body in described blanking gap bottom is provided with the blanking recovery holes, and the blanking gap is provided with and is fixed in the scraper plate that draws blanking on the mill along the bottom in.
Upwards the outlet of the hot-blast stove of air blast is positioned on the Vertical Mill body in described blanking gap, the Vertical Mill body above the blanking gap be provided with a circle upwards in wind-guiding ring flat-plate through reducing gradually.
Be provided with the blanking scraper-trough conveyer of conveying on the mill in the described Vertical Mill body, described mill top is provided with funnel-form and returns the ash cylinder, described time ash cylinder top is fixed with powder concentrator, carries the updraft of abrasive flour and is sent by the discharging opening of Vertical Mill bodies top through powder concentrator.
Described powder concentrator drives rotation by the powder concentrator reductor, it forms by double-layer hollow framework and one week of edge vertically being fixed with rotor blade, described rotor blade is provided with a delineation blades outward, the Vertical Mill inner body wall is fixed in described stator vane upper end, the upper edge of ash cylinder is fixed in go back in the lower end, between the described adjacent rotor blade and have pan feeding gap and all and radial skew between the stator vane.
Stretched into outside to inside sparge pipe by described Vertical Mill body, described sparge pipe spout is positioned at mill milling zone top, the position that described sparge pipe is fixed on the Vertical Mill body is adjustable pipe, and described adjustable pipe two ends are provided with and make spout only along the limiting plate of mill milling zone radial zone activity.
Vertical Mill of the present invention is compared with other products of same model, has following advantage is arranged:
Feeding is even, easy grinding.No matter adopt center feeding or side feeding, material can both evenly be fallen mill central authorities, and material is polished easily;
Grind efficiently, the life-span is long.Adopt four wheel the form of the foetus grinding rollers, mix blocking material ring and the scraper plate of special construction, hardfacing materials is adopted on grinding roller and lining board for grinding discs surface, has guaranteed high abrasive energy and service life;
Grinding efficiency is high.Adopt up-to-date sound attitude separator, grinding efficiency is high;
Operational shock is little.Xoncrete structure is adopted on the rocker bearing basis, and four tie-beams are connected with the rocker bearing base, have formed the support of whole grinding machine shell, thereby have reduced the vibration of grinding machine; Bed of material shakiness remains certain spacing between grinding roller and the mill, even also can not produce excessive vibration;
Working service is convenient.Hydraulic pressure tension system adopts the cylinder arm to add rocker structure, and every group of grinding roller uses independently compression system during pressurization; The maintenance hydraulic cylinder can be routed up single grinding roller outside the body independently, and inspection and maintenance is convenient; Whole compression system only has grinding roller in mill, and all outside mill, it is few that wind is swept parts for other; Adopt the given pretightning force of form of conical ring during the grinding roller assembling, after debugging finishes, but long-play need not the gradation fastening bolt;
Security performance is high.Rocker arm system has adopted the specific safety design, keeps specific gap, the device security when guaranteeing maintenance and maloperation between grinding roller and the mill.
Description of drawings
The below briefly explains the content of every width of cloth accompanying drawing expression in the specification of the present invention and the mark among the figure:
Fig. 1 is the Vertical Mill structural representation;
Fig. 2,3,4 is the Vertical Mill partial schematic diagram;
Mark among the above-mentioned figure is: 1, concrete foundation; 2, main motor; 3, shaft coupling; 4, reductor; 5, hot-blast stove outlet; 6, interstitial fluid cylinder pressure; 7, upset hydraulic cylinder; 8, mill; 9, grinding roller; 10, rocking arm; 11, blanking scraper-trough conveyer; 12, powder concentrator; 13, powder concentrator reductor; 14, rotor blade; 15, discharging opening; 16, return the ash cylinder; 17, maintenance platform; 18, top maintenance platform; 19, blocking material ring; 20, blanking gap; 21, scraper plate; 22, sparge pipe; 23, adjustable pipe; 24, limiting plate; 25, wind-guiding ring flat-plate; 26, stator vane.
The specific embodiment
Referring to Fig. 1 as can be known, the Vertical Mill body is fixed on the concrete foundation 1, mill 8 is installed on the reductor 4 of Vertical Mill body bottom, reductor 4 through shaft coupling 3 by main motor-driven, 8 rotations of band movable grinding disc, the non-milling zone in mill 8 centers is the taper that raises up, its edge grinding district (lining board for grinding discs) is the cambered surface that outwards raises gradually, the Vertical Mill body is provided with the blanking scraper-trough conveyer 11 of conveying on the mill 8, because mill 8 non-milling zones are taper, material can enter uniformly peripheral milling zone with the centripetal force of mill 8 rotations and conical surface sliding force on falling mill 8 time and grind.Grinding roller 9 is supported by rocking arm 10, stretch to mill 8 milling zones top by the Vertical Mill side, grinding roller 9 arranges four usually, homocline is downward-sloping fixing, the roller epidermis face of grinding roller 9 is matched with the milling zone that raises gradually to extrados, above-mentioned mill 8 milling zone structures can be so that material when rotating with mill, be affected by centripetal force and inclination cambered surface, and material can be evenly distributed in milling zone and be ground by grinding roller 9.
For making things convenient for grinding roller 9 maintenance, fixedly rocking arm 10 outer ends of grinding roller 9 (being positioned at this external end of Vertical Mill) is fixed on the supporting revolving shaft seat, and this end is extended with a connecting rod, interlinking lever end is connected with upset hydraulic cylinder 7 on being fixed in concrete foundation 1 by bearing pin, thereby take the supporting revolving shaft seat as fulcrum, connecting rod is lever, upset hydraulic cylinder 7 flexible grinding roller 9 can be routed up Vertical Mill this external overhaul or push carry out work in the Vertical Mill body.Cooperate said structure grinding roller 9 to rout up mechanism, the Vertical Mill body fixedly grinding roller 9 zones above be provided with the upset access door, when grinding roller 9 is positioned at the Vertical Mill body, its rocking arm 10 and upset access door, be provided with the sealing canvas between the Vertical Mill body, when needing like this maintenance to rout up grinding roller 9, only need cut off the sealing canvas, open access door, upset hydraulic cylinder 7 shrinks and gets final product, and is complete when overhauling, also only need to push away on the upset hydraulic cylinder 7, close access door after grinding roller 9 puts in place and sew up again new sealing canvas and get final product, use the canvas sealing can guarantee sealing effectiveness, also can easy disassembly, simultaneously can also avoid vibration effect, reduce quality of fit requirement between parts.
In order to adjust the gap between grinding roller 9 and the mill 8, regulate grinding precision, below the supporting revolving shaft seat, be provided with an interstitial fluid cylinder pressure 6, interstitial fluid cylinder pressure 6 one ends are articulated on the concrete foundation 1, and the other end is hinged on the supporting revolving shaft seat.
Referring to Fig. 2 as can be known; there is blanking gap 20 between mill 8 and the Vertical Mill inner body wall; the bulky grain that does not grind or hard thing can be fallen 20 bottoms, blanking gap by gap between the two; mill 8 milling zone outers are fixed with a circle blocking material ring 19; the thickness of blocking material ring 19 can be changed according to grinding material is different; blocking material ring 19 is fixed by screw, be convenient for changing, thereby effectively control falls into the material particles size in blanking gap 20.Be provided with the blanking recovery holes in the Vertical Mill body in blanking gap 20 bottom, and be provided with in the blanking gap 20 and be fixed in the scraper plate 21 that draws blanking on the mill 8 along the bottom in, scraper plate 21 can rotate with mill, with the material collection that falls in recovery holes.In order further to improve grinding efficiency, can belt feeder be installed below recovery holes, recovered material is delivered to screening installation, and will screen available material and beat heap, perhaps directly deliver to blanking scraper-trough conveyer 11, send into mill 8 and again grind.
Vertical Mill body in blanking gap 20 is provided with the hot-blast stove outlet 8 of upwards air blast, adopt the mode of upwards air blast that qualified fine granular materials is upwards carried, for improving the operating efficiency of ascending air, Vertical Mill body above blanking gap 20 be provided with a circle upwards in wind-guiding ring flat-plate 25 through reducing gradually, have and improve pressure reduction with the effect of raising wind speed.
Referring to Fig. 1,4 as can be known, the top of mill 8 is provided with funnel-form and returns ash cylinder 16 in the Vertical Mill body, return ash cylinder 16 and be the leak shape, large mouthful up, little mouth down, the top of returning ash cylinder 16 is fixed with powder concentrator 12, the updraft that carries abrasive flour must pass through powder concentrator 12, could be sent by the discharging opening 15 of Vertical Mill bodies top, powder concentrator 12 drives rotation by powder concentrator reductor 13, it forms by double-layer hollow framework and one week of edge vertically being fixed with rotor blade 14, the rotor blade 14 outer delineation blades 26 that are provided with, the Vertical Mill inner body wall is fixed in said stator blade 26 upper ends, edge on the ash cylinder 16 is fixed in go back in the lower end, wherein has pan feeding gap and equal and radial skew between the adjacent rotor blade 14 and between the stator vane 26.The blade of underproof like this material (particle is excessive) meeting powder concentrator 12 stops, and falls into back ash cylinder 16 thereby be affected by gravity, and the mill 8 that falls back grinds raising grinding fineness again.
Referring to Fig. 3 as can be known, stretched into outside to inside sparge pipe 22 by the Vertical Mill body, these sparge pipe 22 spouts are positioned at mill 8 milling zones top, sparge pipe 22 can be flexible at the Vertical Mill body, its position of being fixed on the Vertical Mill body is adjustable pipe 23, be provided with at adjustable pipe 23 two ends and make spout only along the limiting plate 24 of mill 8 milling zone radial zone activities, thus convenient injected material when mill 8 milling zones are cleared up or ground.
Be convenient maintenance and regular maintenance, Vertical Mill body middle part and tip position also are provided with maintenance platform 17 and top maintenance platform 18.
The Vertical Mill operation principle is as follows: material is sent in the mill via blanking scraper-trough conveyer 11, and material is admitted to mill 8 centers, and Vertical Mill master motor 5 drives mill 8 rotations by roller mill speed reducer 4, and mill 8 rotates four grinding rollers of drive and carries out rotation.The mill 8 of simultaneously rotation produces centrifugal force, makes material toward the abrasive areas motion of grinding roller 9, and grinding roller 9 runnings are ground material.The material that ground is crossed the mill edge, and the hot blast of being sent into by hot-blast stove 5 blows afloat, and enters the powder concentrator 12 of grinding machine top.Powder concentrator reductor 13 rotor drivens 14 rotate and select powder, and powder concentrator separates fine powder with meal, and fine powder is collected by discharging opening 15.Thicker particle falls into mill 8 by time ash cylinder 16 and re-starts grinding, finally finishes the overall process of former abrasive lapping.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.