CN2319116Y - Medium thickness pulp disk grinder - Google Patents

Abstract

The utility model relates to a pulp grinder which is suitable for beating the pulp, the pulp density of which is 6%-12%. A disc mill is composed of a material inlet, a fixed grinding disc which is fixed on a central position, and a rotating grinding disc, and a middle cavity among tooth grinding areas of the fixed grinding disc and the rotating grinding disc and the center of the grinding disc is provided with a concave cavity. An included angle which is formed in the opposite direction is between 16 DEG and 32 DEG, and a pulp outlet is on a tangential direction at the bottom of a pulp grinding chamber. The diameters of a pulp inlet and the pulp outlet are 1.5 to 2.5 times of diameters of the pulp inlet and the pulp outlet of a traditional disc grinder. A casing of a pulp grinding chamber is composed of a top cover with an observation window, a side cover and the casing.

Description

A kind of middle concentration paper pulp disc mill

The utility model relates to a kind of disc mill that is used for intermediate concentration paper pulp, belongs to paper making equipment manufacturing technology field.

For a long time, the beating equipment that generally uses of the paper mill of China is a disc pulping machine.This fiberizer divides two kinds of double plate grinding machine and single-deck grinding machines again.These two kinds of disc mills have following shortcoming, and the one, fixedly the space that paper pulp radially flows between mill and the rotary grinding disk does not have or has only the very little tapering that cooperates, and is unfavorable for that paper pulp enters the roll flute district; The 2nd, be subjected to the restriction of stock inlet and grout outlet position and size, it is bigger to advance slurry and pulp resistance.For the double plate grinding machine, because fixedly mill all is equipped with on the rotary grinding disk both sides, stock inlet is opened fixedly between mill axis hole and the roll flute district, be restricted by the bore of stock inlet that the position is limit, pulp-inlet pipe also can only be communicated with the fixing stock inlet of mill with the inclination angle about 45, and the paper pulp transporting resistance is bigger; For the single-deck grinding machine, though stock inlet is subjected to the restriction of roll flute sector width at the center of fixing mill and perpendicular to the mill setting, the stock inlet diameter is too small, and the paper pulp intake resistance is also bigger; The 3rd, no matter double plate grinding machine or single-deck grinding machine, its grout outlet generally is provided with above the defibrination chamber, and the less pulp resistance that makes of size increases, and is unfavorable for the outflow of paper pulp.Owing to above three aspects, this disc mill generally can only be used to grind low concentration (3%～4%) paper pulp, when pulp density surpasses 5%, advances the just smooth even obstruction of slurry.And under low concentration defibrination, too low because of concentration first, paper pulp fiber density is little, be difficult to rely on fiber frequently rising and falling between the flank of tooth and teeth groove and produce friction mutually, branch silk, fluffing, brooming and the fibrillating of fiber mainly relies on the friction between the flank of tooth, and this will reduce flank of tooth gap, the result not only makes paper pulp fiber be subjected to the effect of tip edge and is seriously cut off easily, influence paper strength, and noise is big, abrasive disk abrasion is fast; Second because of concentration is too low, water consumption, power consumption are all than higher.Another shortcoming of traditional disc pulping machine is, its defibrination chamber housing generally all is made up of toroidal shell and side cover two parts, and the defibrination chamber of this two-piece type structure checks and check all very inconvenient to the cooperation of mill.

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of water consumption, power consumption and noise all lower, and the defibrination quality is good, and convenient the adjusting and the fiberizer of checking that is applicable to middle concentration paper pulp.

Main points of the present utility model are, fixedly formed by mill and a rotary grinding disk by one for mill, fixedly mill is screwed on the side cover of defibrination chamber, stock inlet is opened heart position and vertical with mill therein, the diameter of stock inlet is 1.5～2.5 times of conventional disc grinding machine stock inlet diameter of identical mill size, its grout outlet is opened in defibrination chamber bottom and tangentially and is provided with, and its diameter is 1.5～2.5 times of conventional disc grinding machine grout outlet diameter of identical mill size.The fixing tapered cavity of lumen between mill stock inlet and the roll flute district also forms the tapered recess of same size between the axis hole of rotary grinding disk and the roll flute district.Rotary grinding disk is pressed on the main shaft by getting rid of blade wheel, rotary grinding disk and fixedly two tapered recess of mill form the wedge shape lumen of 16 °～32 ° of angles in opposite directions.Defibrination chamber housing partly is made up of the top cover and the basic housing three of side cover, band form, and three parts connect by screw.

Accompanying drawing 1 is a structural representation of the present utility model, is described further below in conjunction with 1 pair of the utility model of accompanying drawing.

As shown in Figure 1, defibrination chamber housing is by side cover 3, the band driveed with stock inlet in the center There are top cover 4, the basic housing 8 three of double vision window partly to consist of. Side cover 3 and housing 8, top cover 4 All use screw attachment with side cover 3 and housing 8. Fixedly mill 5 is screwed on side cover 3, 2 is the stock inlet that arranges with fixing mill central vertical, and rotary grinding disk 6 is screwed and is rotating The rotation of the main shaft 10 that directly drives in the disk 7 and with motor and High Rotation Speed. Fixing mill With the spacing of rotary grinding disk by worm and worm gear or hydraulic gear adjustment, get rid of blade wheel 1 usefulness Screw is fixed on the spindle nose of main shaft 10, and its on the one hand is pressed on main shaft 10 to rotary disk 7 On the taper spindle nose, High Rotation Speed gets rid of paper pulp into the defibrination district on the other hand. Gland 9 is rolling discs 7 And the gland that packing seal is used between the housing 8. Grout outlet 11 is located at the tangent line side of housing 8 bottoms Upwards. Lower capping 12 usefulness screw attachment are in the bottom of housing 8. In case of necessity, can open lower capping 12, as the outlet of paper pulp or dirt.

When the paper pulp of 6%～12% concentration is pumped into stock inlet by middle concentration paper pulp, with main shaft 10 height The blade wheel 1 that gets rid of of speed rotation namely gets rid of slurry into the taper lumen and enters Mo Qu. Middle concentration pulp exists The mill 6 of high speed rotating drives the lower circular motion that is similar to helix, and paper pulp fiber continually Thereby rise to fall within and realize defibrination between the flank of tooth and the teeth groove. Middle concentration paper pulp is the edge after mill district fast processing Mill district tangential direction is left the mill district, arrives defibrination chamber runner, through tangential direction heavy caliber grout outlet 11 Discharge the defibrination chamber.

Advantage of the present utility model is, compare the input pulp density with traditional disc mill high 1～2 times, during making beating between teeth groove fibre density big, a large amount of fiber form change the internal friction that mainly depends between the paper pulp fiber, tip edge reduces relatively to the direct effect of fiber, avoid or reduced the cutting action of tip edge to fiber, strengthened the effect of branch silk, fluffing, brooming and the fibrillating of fiber, paper strength improves 10～30%; Friction between the mill weakens greatly reduces noise, and the water consumption reduces more than 40%, power consumption reduces by 20～30%.In addition,, need not open top cover and just can see the situation that the indoor paper pulp of spark-out passes through, open top cover and just can check and check blade span easily by form because defibrination chamber housing adopts the three-chip type structure.

The present utility model people has following examples:

450 millimeters of mill diameters, 150 millimeters of stock inlet diameters, 150 millimeters of grout outlet diameters; Speed of grinding plate: 1480 rev/mins; The abrasive disk space adjusting range is 0～30 millimeter.Pulp density is 6～12%.

Through entrusting Guangdong Province's Office for Scientific and Technical Information retrieval World Patent Index of～nineteen ninety-five in 1981 And the main periodical of in the world papermaking aspect, find no the report identical with the utility model.

Claims (3)

1, a kind ofly drives the middle concentration paper pulp disc mill that fixedly mill and rotary grinding disk in the center constitute by defibrination chamber housing, stock inlet, it is characterized in that: fixedly the lumen between the roll flute district of mill and rotary grinding disk and mill central feeding mouth or the transmission axis hole all is tapered recess, and the angle that two measure-alike tapered recess form in opposite directions is between 16 °～32 °.

2, the described middle concentration paper pulp disc mill of claim 1, it is characterized in that described stock inlet size and grout outlet size are the conventional disc grinding machine stock inlet of identical abrasive disc size and 1.5～2.5 times of grout outlet size, grout outlet tangentially is provided with in bottom, defibrination chamber.

3, claim 1 or 2 described middle concentration paper pulp disc mills is characterized in that described defibrination chamber housing partly is made up of the top cover three of side cover, housing and band form.

Images