CN202377048U

CN202377048U - Rolling mill

Info

Publication number: CN202377048U
Application number: CN201120559076XU
Authority: CN
Inventors: 王金华
Original assignee: WEIFANG ZHENGYUAN POWDER ENGINEERING EQUIPMENT CO LTD
Current assignee: WEIFANG ZHENGYUAN POWDER ENGINEERING EQUIPMENT CO LTD
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2012-08-15
Anticipated expiration: 2021-12-28

Abstract

The utility model discloses a rolling mill and belongs to the technical field of crushing machines. The rolling mill mainly comprises a crushing box, a grading device and a feeding device, wherein the crushing box comprises a box body, a grinding ring, a main shaft, a rotor and grinding rollers; an air inlet channel is arranged on the side wall of the box body and communicates an air inlet at the bottom of the box body and a grading chamber of the grading device; the grinding ring is provided with a ring-shaped grinding track; the main shaft is driven by a power device; the rotor is fixedly connected with the main shaft; a ring-shaped gap with a big upper part and a small lower part is arranged between the outer surface of the rotor and the inner surface of the grinding ring; the grinding rollers are arranged in an installing groove of the rotor by pin shafts, and the grinding rollers are at least divided into an upper group and a lower group. The rolling mill disclosed by the utility model has the advantages that the technical problems of large coarse particle quantity, low crushing quality and low yield in secondary crushing are solved, the structural design is reasonable, and the automation degree is high; and the rolling mill is widely applied in ultrafine crushing of industrial mineral powder.

Description

The roll-in mill

Technical field

The utility model relates to the size reduction machinery technical field, relates in particular to a kind of roll-in reducing mechanism of solid material ultra-fine grinding.

Background technology

With 20th century the mid-80 by the roller mill of Germany invention for making a start, grinding with the various rollers of productions such as Germany big vast fort company, thin river Alpine company is representative, the rolling flour mill at present in various powder technologies by widespread usage.Present stage along with the continuous development of powder technology, also exists shortcoming and defect like traditional high-end roller mill such as the high pressure roller mill of those special grinding machine manufactured of France, the interior roller mill that design and develop in French FCB research center, no longer meets the present stage requirement.

One Chinese patent application prospectus CN 2601740Y discloses a kind of ultra-fine internal classification centrifugal hoop roller mill; This product comprises the base assembly; Main shaft assembly; Feed assembly and power assembly are with the up-small and down-big spacer ring of inner ring and a cover is become by the ring roller mill vice president that the main shaft assembly main shaft directly drives in that block assembly is embedded, are provided with the classification assembly that inversed taper platform shape flow splitter that negative angle grading wheel that a cover drives by rotating shaft and correspondence be fixed on grading room constitutes in the grading room on block assembly.It can form air-flow speed change spiral rise with impact simultaneously, extruding, grinding material, reduced energy consumption, improved effectiveness of classification.But, because its bull ring becomes the gap identical with ring roller mill vice president, the coarse granule of secondary pulverizing is increased, pulverize of low qualityly, reduced output.

The utility model content

The utility model technical problem to be solved is: a kind of roll-in mill is provided, the technical problem that the coarse granule quantity of pulverizing with the solution secondary is many, pulverizing is of low quality, yield poorly.

For solving the problems of the technologies described above, the technical scheme of the utility model is: the roll-in mill comprises crush box; Be installed on the grading plant on said crush box top; Be used for sending into the material feeding device to said crush box, casing, the sidewall of said casing is provided with air intake passage; Said air intake passage is communicated with the grading room of air inlet and grading plant, and said air inlet is arranged at the bottom of casing; Bull ring, said bull ring are fixedly installed on the inwall of said casing, and bull ring is provided with the annular abrasion track; By the main shaft that power set drive, said main shaft rotates and is installed in the casing; Rotor, said rotor is fixedly connected with said main shaft, has the annular gap between the outer surface of said rotor and the inner surface of said bull ring, and said annular gap is up big and down small; Grinding roller, said grinding roller are installed on through bearing pin in the mounting groove of said rotor, and grinding roller relies on the described grinding track when receiving centrifugal action, and said grinding roller is divided into two groups up and down at least.

As a kind of improvement, said rotor is divided into upper rotor part body and lower rotor part body, on said upper rotor part body and the lower rotor part body at least one group of grinding roller is installed respectively.

As further improvement, said grinding roller is distributed in said rotor circumference and upper-lower position is staggeredly arranged.

As further improvement, it is inner that said roll-in mill comprises that also an inner barrel, said inner barrel are fixedly installed in said grading room, and and the cylindrical shell of said grading plant between form the powder flow channels of annular.

As further improvement, said feed arrangement comprises a feed pipe, and said feed pipe passes said inner barrel and is opened on said rotor center place.

As further improvement, said roll-in mill also comprises a taper material separating disc, and said material separating disc is positioned at the below of said feed pipe and is fixed on the said rotor.

As a kind of improvement, said roll-in mill comprises that also a wind dish, said wind dish are positioned at said rotor below, are fixed on the said main shaft.

Adopted technique scheme, the beneficial effect of the utility model is: because grinding roller divides many groups, increased grinding roller quantity, enlarged effective pulverizing area, improved output; Because the gap between the inner surface of the outer surface of lower rotor part and bull ring is less than the gap between the inner surface of the outer surface of upper rotor part and bull ring; After making large granular materials through last group of grinding roller precomminution; Again by under organize grinding roller and carry out fine grinding and extra-fine grinding, improved the pulverizing quality; Owing to be provided with inner barrel, increased air-flow velocity, make that material layering in grading room is clear and definite, improved output; Because feed arrangement adopts intermediate feed, material is directly got into pulverize the district, and do not collide with the material of having pulverized, reduced energy consumption, improved production capacity; Because grading plant has been installed, make material in crushing process, effectively isolate qualified fine powder and carry out secondary and pulverize coarse granule, avoided crossing and pulverized; Link to each other with air-introduced machine owing to grading plant simultaneously; Make to produce negative pressure in the pulverizer, operating environment has been protected in no dust leakage.In a word,, make the utility model roll-in mill reduce secondary and pulverize coarse grained quantity, improved the pulverizing quality, improved production capacity owing to adopt technique scheme.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

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

Fig. 2 is the structural representation of Fig. 1 A-A;

Among the figure: 1, grading plant, 2, inner barrel, 3, feed pipe, 4, material separating disc, 5, bearing pin, 6, grinding roller, 7, casing, 8, air intake passage, 9, the wind dish, 10, air inlet, 11, main shaft, 12, base, 13, rotor, 14, bull ring, 15, power set.

The specific embodiment

Shown in Fig. 1 and Fig. 2 were common, a kind of roll-in mill comprised crush box; Be installed on the grading plant 1 on said crush box top; Be used for sending into the material feeding device to said crush box, said crush box comprises casing 7, and the sidewall of said casing 7 is provided with air intake passage 8; Said air intake passage 8 is communicated with the grading room of air inlet 10 and grading plant 1, and said air inlet 10 is arranged at the bottom of casing 7; Bull ring 14, said bull ring 14 is fixedly installed on the inwall of said casing 7, and bull ring 14 is provided with the annular abrasion track; By the main shaft 11 that power set 15 drive, said main shaft 11 rotates and is installed in the casing 7; Rotor 13, said rotor 13 is fixedly connected with said main shaft 11, has the annular gap between the inner surface of the outer surface of said rotor 13 and said bull ring 14, and said annular gap is up big and down small; Grinding roller 6; Said grinding roller 6 is installed in the mounting groove of said rotor 13 through bearing pin 5; Grinding roller 6 relies on the described grinding track when receiving centrifugal action; Said grinding roller 6 is divided into two groups up and down at least, and the quantity of every group of grinding roller 6 is a plurality of as far as possible according to the gap design between the outer surface of the inner surface of bull ring 14 and rotor 13 mounting grooves.

Said rotor 13 is divided into upper rotor part body and lower rotor part body, and said upper rotor part body and lower rotor part body are installed at least one group of grinding roller 6 respectively.Said grinding roller 6 is distributed in said rotor 13 circumference and upper-lower position is staggeredly arranged.

It is inner that said roll-in mill comprises that also an inner barrel 2, said inner barrel 2 are fixedly installed in said grading room, and and the cylindrical shell of said grading plant 1 between form the powder flow channels of annular.

Said feed arrangement comprises a feed pipe 3, and said feed pipe 3 passes said inner barrel 2 and is opened on said rotor 13 centers.

Said roll-in mill comprises that also a taper material separating disc 4, said material separating disc 4 are positioned at the below of said feed pipe 3 and are fixed on the said rotor 13.

Said roll-in mill comprises that also a wind dish 9, said wind dish 9 are positioned at said rotor 13 belows, are fixed on the said main shaft 11.

Its course of work is following:

Main shaft 11 drives material separating disc 4 rotation at a high speed through power set 15, and material gets into pulverizing chamber by feed pipe 3, falls on the material separating disc 4 of rotation at a high speed; Because centrifugal action, material is thrown to the crushed work district, and grinding roller 6 grinds rail high speed and rotates in rotor 13 drive lower edges; Grinding roller is around bearing pin 5 rotations simultaneously, and 6 pairs of materials of group grinding roller carry out hammering, extruding, grinding on the process, after the precomminution; Less clearance between the inner surface of the outer surface of material through lower rotor part and bull ring 14 drops down onto down and organizes the grinding roller milling zone, again by under organize grinding roller and carry out fine grinding and extra-fine grinding; The qualified fine powder that obtains in the process of lapping is blown out by the ascending air that air inlet 10 gets into, and coarse granule is proceeded to grind, and fine grained that grinding obtains and the qualified fine powder of part are under air intake air-flow and 9 effects of wind dish; Get into grading room along air intake passage 8, under the ascending air effect, rise to graded region; The different air centrifugal force of the different generations of the grading wheel rotating speed of grading plant 1; The powder that makes qualified fineness is collected by dust-precipitator after discharging discharging opening through the labyrinth, and purified gas is discharged by air-introduced machine, meal since gravity and other impact energy effects sent back to once more and pulverize the district and repeatedly pulverize.

The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the utility model.

Claims

1. the roll-in mill comprises

Crush box,

Be installed on the grading plant on said crush box top,

Be used for sending into the material feeding device to said crush box, it is characterized in that: said crush box comprises

Casing, the sidewall of said casing is provided with air intake passage, and said air intake passage is communicated with the grading room of air inlet and grading plant, and said air inlet is arranged at the bottom of casing;

Bull ring, said bull ring are fixedly installed on the inwall of said casing, and bull ring is provided with the annular abrasion track;

By the main shaft that power set drive, said main shaft rotates and is installed in the casing;

Rotor, said rotor is fixedly connected with said main shaft, has the annular gap between the outer surface of said rotor and the inner surface of said bull ring, and said annular gap is up big and down small;

Grinding roller, said grinding roller are installed on through bearing pin in the mounting groove of said rotor, and grinding roller relies on the described grinding track when receiving centrifugal action, and said grinding roller is divided into two groups up and down at least.

2. roll-in mill as claimed in claim 1, it is characterized in that: said rotor is divided into upper rotor part body and lower rotor part body, on said upper rotor part body and the lower rotor part body at least one group of grinding roller is installed respectively.

3. roll-in mill as claimed in claim 2, it is characterized in that: said grinding roller is distributed in said rotor circumference and upper-lower position is staggeredly arranged.

4. like claim 1 or 2 or 3 described roll-ins mill, it is characterized in that: it is inner that said roll-in mill comprises that also an inner barrel, said inner barrel are fixedly installed in said grading room, and and the cylindrical shell of said grading plant between form the powder flow channels of annular.

5. roll-in mill as claimed in claim 4, it is characterized in that: said feed arrangement comprises a feed pipe, said feed pipe passes said inner barrel and is opened on said rotor center place.

6. roll-in mill as claimed in claim 5 is characterized in that: said roll-in mill also comprises a taper material separating disc, and said material separating disc is positioned at the below of said feed pipe and is fixed on the said rotor.

7. roll-in mill as claimed in claim 1 is characterized in that: said roll-in mill comprises that also a wind dish, said wind dish are positioned at said rotor below, are fixed on the said main shaft.