CN213232960U - Grinding disc for efficiently pumping fiber pulp - Google Patents

Abstract

The utility model discloses a high-efficient pump sending fiber slurry's abrasive disc, be non-isosceles trapezoid's rack including abrasive disc base member and cross-section, non-isosceles trapezoid's left apex angle D angle is the obtuse angle, non-isosceles trapezoid's right apex angle A angle is the acute angle, the abrasive disc base member is the fanning strip, the rack is radial distribution on the surface of mill base member, the rack is logarithmic spiral arc, adjacent two for the depth direction be formed with the tooth's socket between the rack, the tooth's socket is radial distribution, the tooth's socket width of interior department is less than the tooth's socket width of outer department. The utility model has the advantages of double functions, convenient and fast use and high efficiency of pumping fiber slurry.

Description

Grinding disc for efficiently pumping fiber pulp

Technical Field

The utility model relates to a fiberizer technical field, concretely relates to abrasive disc of high-efficient pump sending fiber slurry material.

Background

Refiners are widely used in the refining of cellulose fibres or similar fibres, where the refiner plates are the core elements of the refiner and the racks on the surface of the refiner plates are the core elements of the refiner plates. In the refining process of cellulose fiber or similar fiber, the fiber is sheared and destroyed mainly by the edge of the cutting edge of the rack, and the cutting force or refining strength is adjusted by the design change of the width of the rack and the width of the groove; depending on the fiber properties and process conditions, it may be desirable to sever the fibers vigorously, and it may be desirable to avoid severing as much as possible. The existing grinding plate is basically a set single-function grinding plate, the section of a rack of the grinding plate is basically isosceles trapezoid and rectangle, and the tooth groove of the rack has the common efficiency of pumping fiber pulp; in addition, the left vertex angle and the right vertex angle of the rack are equal angles, and the refining strength of the blade angle cannot be changed by changing the rotating direction; on the premise of not replacing the grinding plate, the requirements of low-strength grinding with low cutting force and high-strength grinding with severe cutting of fiber cannot be met simultaneously. The centrifugal pumping action of the existing grinding plate is small, so that fiber pulp often blocks grinding plate tooth grooves and a refiner.

For example, chinese patent publication No. CN102086606A discloses a refiner disc for producing synthetic fiber pulp, wherein the teeth comprise a flat surface portion formed by the working surface of the disc and an arc surface portion having one side connected to the flat surface portion and the other side connected to the groove, i.e., the surface of the flat surface portion connected to the groove has a curvature. The adoption of the grinding sheet has the problems that: firstly, the arc-shaped angle of the edge of the grinding tooth reduces the cutting action of the grinding tooth on fibers, and is not suitable for the technological requirement of reinforced cutting of the fibers. And secondly, the arc angle of the grinding tooth edge gradually disappears in the abrasion process, so that the characteristic disappears.

For another example, chinese patent publication No. CN103374849A discloses a reversible low energy refiner plate. The adoption of the grinding sheet has the problems that: the grinding teeth and the two sides of the groove keep the same geometric structure, and the positive and negative rotation have the same cutting force.

At present, the grinding discs with different cutting forces are frequently required to be replaced to meet the process indexes, and the centrifugal pumping action of the grinding discs is small, so that the tooth grooves of the grinding discs and a pulping machine are frequently blocked by fiber pulp. The shutdown in the meantime affects the production schedule, increases the labor capacity of workers, and causes a great deal of waste.

For this reason, it is desired to provide a suitable grinding plate to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a high-efficient pump sending fiber slurry's abrasive disc, includes that abrasive disc base member and cross-section are non-isosceles trapezoid's rack, non-isosceles trapezoid's left apex angle D angle is the obtuse angle, non-isosceles trapezoid's right apex angle A angle is the acute angle, the abrasive disc base member is the fan-shaped piece, the rack is radial distribution on the surface of mill base member, the rack is logarithmic spiral arc for the depth direction, adjacent two be formed with the tooth's socket between the rack, the tooth's socket is radial distribution, the tooth's socket width of interior edge department is less than the tooth's socket width of edge department.

Furthermore, a plurality of bolt holes are formed in the grinding plate.

Further, the angle A corresponds to the radial edge of the angle A for cutting when the grinding plate rotates clockwise, and the angle D corresponds to the radial edge of the angle D for avoiding cutting when the grinding plate rotates anticlockwise.

Preferably, the radial edge of the angle A and the radius line of the grinding sheet base body form an included angle of 0-45 degrees.

Preferably, the angle a is preferably 80 ° to 89 °, and the smaller the angle, the stronger the cutting force; the D angle is preferably 100-160 DEG, and the larger the angle is, the weaker the cutting force is.

Preferably, the number of the radial partitions of the rack is 1-6.

Preferably, the width of the tooth surface of the rack is 1-6 mm, the width of the tooth bottom of the rack is 2-18 mm, and the height of the rack is 2-18 mm.

Preferably, the width of the groove bottom of the tooth groove is 2.5-8 mm, and the width of the groove surface is 1-18 mm.

Preferably, the material of the abrasive disc includes, but is not limited to, metal, stone, ceramic, tungsten carbide, zirconia, alumina, silicon carbide, polyphenylene sulfide, high molecular polyethylene, MC6, engineering plastic.

The utility model has the advantages that: the utility model can rapidly change the cutting force of different blade angles of the rack by changing the rotation direction of the grinding disc through the rack with a non-isosceles trapezoid cross section, thereby changing the function of the grinding disc; the circular arc-shaped rack of the utility model utilizes the centrifugal force pumping principle, is beneficial to more efficiently pumping fiber pulp, and avoids the embarrassment that the fiber pulp often blocks the tooth grooves of the grinding disc and the pulp grinder; the utility model discloses long service life, the range of application is wide, and convenient to use is swift, has adapted to the requirement of fibre thick liquids and technological condition variability, has guaranteed the continuity of production process, has reduced to shut down and has changed the influence of abrasive disc to the production progress, has reduced staff's the amount of labour, has saved the abrasive disc cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the rack of the present invention.

In the figure: 101. Angle a radial edge, 102, angle D radial edge, 103, tooth face, 104, blade base, 105, rack, 106, tooth slot, 107, outer edge, 108, inner edge, 109, bolt hole.

Detailed Description

As shown in fig. 1-2, a refiner plate for high efficiency pumping of fibrous pulp comprises a refiner plate base 104 and a rack 105 with a cross section of a non-isosceles trapezoid DBCA, the left vertex angle D of the non-isosceles trapezoid being an obtuse angle, the right vertex angle a of the non-isosceles trapezoid being an acute angle, and the refiner plate base 104 being a 90-degree sector.

The racks 105 are radially distributed on the surface of the grinding disc base body, and the racks 105 are not arranged in a group, so that the grinding disc has higher pumping force.

The rack 105 is in the shape of a logarithmic spiral arc in the depth direction, and the fiber slurry can be more efficiently pumped by utilizing the centrifugal force pumping principle.

Tooth grooves 106 are formed between every two adjacent racks 105, the tooth grooves 106 are distributed in a radial mode, and the width of the tooth grooves 106 at the inner edge 108 is smaller than that of the tooth grooves 106 at the outer edge 107.

Two bolt holes 109 are symmetrically arranged on the grinding sheet.

Angle A corresponds to angle A radial edge 101 for cutting when the blade is rotated clockwise, and angle D corresponds to angle D radial edge 102 for avoiding cutting when the blade is rotated counterclockwise.

The angle a radial edge 101 makes an angle of 32 ° with the radius line of the blade base 104, which facilitates control of the cutting force thereof.

The preferred A angle is 86-88 degrees; the D angle is preferably 133-137 DEG, and the larger the angle is, the weaker the cutting force is.

The number of the rack 105 is 1 in radial division.

The width of the tooth surface 103 of the rack 105 is 2mm, the width of the tooth bottom of the rack 105 is 5mm, and the maximum length of the rack 105 is 180 mm.

The slot bottom of the gullet 106 has a minimum width of 2.5 mm.

In the pulping process, when the process is adjusted, an old grinding disc is not required to be disassembled to replace a new grinding disc, only the rotating direction of the grinding disc needs to be changed, the angle A and the angle D are respectively used as working edge angles, and the generated cutting force is greatly different: when the grinding disc rotates clockwise, the A angle can cut off the fiber violently; when the grinding sheet rotates anticlockwise, the angle D can avoid cutting off the fibers as much as possible, and good fluffing and brooming effects are generated on the fibers.

According to the refining process conditions: the rated power of the refiner is 315kw, the softwood fiber is processed by clockwise rotation at 3000kg/h, and the A-angle radial edge 101 is mainly cut off; the hardwood fibers are processed by rotating anticlockwise for 3500kg/h, the D-angle radial edge 102 avoids cutting, and the defibering and brooming are the main points.

The utility model discloses a preparation can be accomplished to multiple material for use to the abrasive disc, including but not limited to metal, stone material, pottery, tungsten carbide, zirconia, aluminium oxide, carborundum, polyphenylene sulfide, polymer polyethylene, MC6, engineering plastics.

The utility model discloses a preparation can be accomplished for use multiple technology to the abrasive disc, including but not limited to casting, vulcanization, sintering, mechanical subtracting material processing, welding, 3D prints the vibration material disk technology.

The utility model discloses a grinding disc has not only stopped fibre thick liquids and has often blockked up the embarrassment of grinding disc tooth's socket and fiberizer, still has difunctional and convenient to use swift advantage, can use extensive cellulose fiber or similar fibre to grind the thick liquid in-process, if: pulping and papermaking, aramid fiber preparation, papermaking tobacco sheets, nitrocellulose, acetate fibers, dietary fibers, alginate fibers, artificial board fibers, novel material fibers and the like.

The grinding disc of the utility model has very high application prospect, can be applied to a high-consistency pulping machine, a medium-consistency pulping machine and a low-consistency pulping machine which are classified from the suitability of the pulping concentration, and a single disc mill, a double disc mill and a multi-disc mill which are classified from the structure of the grinding disc, and improves the function options of the pulping machines, so that the single pulping machine achieves the multifunctional purpose; and grinding discs with straight teeth, arc teeth and H-shaped teeth can be designed on the basis, so that a wider pulping process is expanded.

Claims (8)

1. The utility model provides a high-efficient pumping fiber slurry's abrasive disc, characterized in that, includes abrasive disc base member (104) and rack (105) that the cross-section is not isosceles trapezoid, the left apex angle D of non-isosceles trapezoid is the obtuse angle, the right apex angle A of non-isosceles trapezoid is the acute angle, abrasive disc base member (104) is the fan-shaped piece, rack (105) are radial distribution on the surface of abrasive disc base member, rack (105) are the logarithmic spiral arc for the depth direction, adjacent two be formed with tooth's socket (106) between rack (105), tooth's socket (106) are radial distribution, tooth's socket (106) width of inner edge (108) department of abrasive disc base member (104) is less than tooth's socket (106) width of outer fringe (107) department of abrasive disc base member (104).

2. A refiner plate for efficient pumping of fibre pulp according to claim 1, characterized in that the plate is provided with a number of bolt holes (109).

3. A refiner plate for efficient pumping of fibrous pulp according to claim 1, wherein the angle a corresponds to an angle a radial edge (101) for cutting when the plate is rotated clockwise and the angle D corresponds to an angle D radial edge (102) for avoiding cutting when the plate is rotated counterclockwise.

4. A refiner plate for efficient pumping of fibrous pulp according to claim 1, characterized in that the angle a radial edges (101) form an angle of 0 ° to 45 ° with the radius line of the refiner plate base body (104).

5. A refiner plate for high efficiency pumping of fibrous pulp according to claim 1, wherein the angle a is 80 ° to 89 °, and the smaller the angle, the stronger the shearing force; the angle D is 100-160 degrees, and the larger the angle is, the weaker the cutting force is.

6. A refiner plate for high efficiency pumping of fibrous pulp according to claim 1, characterized in that the number of radial partitions of the toothed rack (105) is 1-6.

7. A refiner plate for high efficiency pumping of fibrous pulp according to claim 1, characterized in that the width of the tooth surface (103) of the toothed bar (105) is 1-6 mm, the width of the tooth bottom of the toothed bar (105) is 2-18 mm, and the height of the toothed bar (105) is 2-18 mm.

8. A refiner plate for high efficiency pumping of fibrous pulp according to claim 1, characterized in that the width of the groove bottom of the tooth grooves (106) is 2.5-8 mm and the width of the groove face is 1-18 mm.

Images