CN211897571U

CN211897571U - Grinding disc unit of grinding disc of pulping machine

Info

Publication number: CN211897571U
Application number: CN201922286006.0U
Authority: CN
Inventors: 张景争; 鲁斌; 胡燕冬; 王红星
Original assignee: Shanghai Orient Champion Paper Co Ltd
Current assignee: Shanghai Orient Champion Paper Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-11-10
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a grinding unit of a refiner plate of a refiner, which is a fan-shaped plate and is provided with an inlet end and an outlet end; grinding teeth are arranged on a bottom plate of each grinding sheet unit, tooth grooves are formed between every two adjacent grinding teeth, and the groove width of a first tooth groove in the middle of each grinding sheet unit is larger than the groove width of a second tooth groove in the two ends of each grinding sheet unit along the circumferential direction of each grinding sheet unit; the tooth height of the first grinding tooth positioned in the middle of the grinding sheet unit is larger than the tooth height width of the second grinding tooth positioned at the two ends of the grinding sheet unit; the tooth widths of grinding teeth on the whole grinding sheet unit are the same; the grinding teeth are arc-shaped in the depth direction. Compared with the prior art, the utility model has the advantages of beating degree is high.

Description

Grinding disc unit of grinding disc of pulping machine

Technical Field

The utility model relates to a handle papermaking fiberizer abrasive disc that contains wood fiber material, especially relate to an abrasive disc unit of fiberizer abrasive disc.

Background

The material containing wood fiber or similar fiber is the main raw material for paper making and pulping, after some preliminary treatment in the early stage, the fiber is defibered, cut, separated and broomed by a pulping machine to make paper pulp meeting different requirements, and then the paper is made or used for other purposes. The refiner is the main equipment in papermaking and pulping, and the grinding disc in the refiner is the core component which influences the refining quality and yield. The grinding disc is formed by combining a whole or a group of independent grinding disc units, has a plurality of different structural forms such as a disc-shaped grinding disc, a conical grinding disc, a cylindrical grinding disc and the like, but is matched with one or two groups of movable grinding discs fixed on a rotating disc and fixed grinding discs fixed on a machine body mounting disc in opposite movement. The rotary disc is driven by a power source and can move axially or radially to adjust the gap between the movable and fixed abrasive discs. The material containing wood fibers or the like is mainly processed and separated in the gaps between the movable and fixed abrasive sheets. The tooth-type structure and size of the grinding teeth of the grinding plate affect the service life of the grinding plate and the energy consumption of the refiner in addition to the refining quality and yield.

Chinese patent CN 108729289 a discloses a refiner plate, including moving the abrasive disc and the fixed abrasive disc of cooperating with it, this refiner plate includes the abrasive disc unit, and it includes entry end and exit end to and two at least different functional areas between, wherein include the thick liquid region of refining at least, the thick liquid region of refining is provided with leads to the thick liquid and leads to the steam groove, two adjacent lead to set up between the thick liquid leads to the steam groove and grinds thick liquid work portion, wherein be provided with the first slot and the second slot of the different degree of depth that grind tooth and set up on it. However, the grinding teeth at the middle position and the two side positions on the grinding sheet unit have the same structure, the grinding teeth are all linear grinding teeth, no arc grinding teeth have long effective contact area, the shearing action is obvious when the fixed teeth are contacted with the movable teeth, and the kneading effect is insufficient; the beating degree of this kind of structure is not good, can't satisfy the user demand.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a refiner plate unit of refiner plate for overcoming the not high defect of beating degree that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

a refiner plate unit of a refiner plate, the refiner plate unit being a segment and being provided with an inlet end and an outlet end; grinding teeth are arranged on a bottom plate of each grinding sheet unit, tooth grooves are formed between every two adjacent grinding teeth, and the groove width of a first tooth groove in the middle of each grinding sheet unit is larger than the groove width of a second tooth groove in the two ends of each grinding sheet unit along the circumferential direction of each grinding sheet unit; the tooth height of the first grinding tooth positioned in the middle of the grinding sheet unit is larger than the tooth height width of the second grinding tooth positioned at the two ends of the grinding sheet unit; the tooth widths of grinding teeth on the whole grinding sheet unit are the same; the grinding teeth are arc-shaped in the depth direction.

The radius corresponding to the arc is 900-1200 mm, preferably 1068 mm; the radius corresponding to the outer side circular arc of the grinding plate unit is 400-600 mm, and preferably 508 mm.

The included angle between the tangent line of the end part of the grinding tooth and the corresponding tangent line of the circumference where the end part is located is an angle alpha; four grinding tooth areas are arranged on the grinding sheet unit, and the alpha angles of the grinding teeth in each grinding tooth area are the same; when the grinding sheet units form a grinding sheet of a pulp grinder, grinding tooth areas on the grinding sheet of the pulp grinder are periodically arranged, and in each period, along the circumferential direction of the grinding sheet units, alpha angles corresponding to the grinding tooth areas are sequentially increased.

The range of the alpha angles corresponding to different gear grinding areas is 70-80 degrees.

The refiner plate of the refiner is formed by sequentially splicing four refiner plate units.

On each blade unit, the first grinding tooth accounts for 0.49-0.54, preferably 0.5 of the total number of grinding teeth.

The number of grinding teeth per grinding area is 13-14, preferably 13.

The tooth width of the grinding teeth on the whole grinding sheet unit is 3.6-3.9mm, and preferably 3.7 mm; the tooth height of the first grinding tooth is 7.2-7.65mm, preferably 7.5mm, and the groove width of the first tooth groove is 2.65-3.1mm, preferably 2.9 mm; the tooth height of the second grinding tooth is 5.35-7.7mm, preferably 5.5mm, and the groove width of the second tooth groove is 2.3-2.65mm, preferably 2.5 mm.

The end part of the grinding tooth on one side of the inlet end is a starting end, and the inclined plane of the end part of the starting end forms an included angle with the bottom plate of the grinding sheet unit.

The positions of the end parts of the starting ends of the grinding teeth form two concentric reference circles, and the radiuses of the two reference circles are different; the starting end parts of the grinding teeth at the interval positions are positioned on the same reference circle, so that the starting ends of the grinding teeth of the whole grinding sheet unit are staggered in length.

The utility model discloses a theory of operation does:

the utility model designs the grinding teeth into arc structure, which increases the effective contact length of the grinding teeth; and because fixed tooth and movable tooth are the cutting into of cambered surface and cambered surface in the twinkling of an eye in the contact, have weakened the shearing action, have strengthened the kneading characteristic, the utility model discloses highly higher with the tooth height design of middle part gerar grinding, the tooth height that is higher than the gerar grinding of both sides, the gerar grinding tip that the intermediate position was put in the cooperation is located two benchmark circles respectively for the tip presents the interval period range of stretching out-draw back-stretching out-draw back, is favorable to thick liquids nature entering mill district progressively, and keeps the good circulation of thick liquids.

Compared with the prior art, the utility model discloses an abrasive disc unit can be with fully untwining the fibre, cutting off, dividing the brooming, and it is high to improve the beating degree, satisfies the preparation demand of paper pulp, further raises the efficiency simultaneously, compares than similar import product, can practice thrift expense 40%.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the drawing, 1 is a blade unit, 2 is two end positions, 3 is an intermediate position, 4 is an inlet end, 5 is an outlet end, 6 is a first tooth grinding zone, 7 is a second tooth grinding zone, 8 is a third tooth grinding zone, 9 is a fourth tooth grinding zone, 10 is a starting end, 11 is a bolt passing hole, 12 is an angle α, and 13 is a bottom plate.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Examples

A grinding disc unit of a grinding disc of a pulping machine is formed by sequentially splicing four grinding disc units 1; as shown in fig. 1, the refiner plate unit 1 is a segment and is provided with an inlet end 4 and an inlet end 5; grinding teeth are arranged on a bottom plate 13 of the grinding plate unit 1, tooth grooves are formed between every two adjacent grinding teeth, the grinding teeth are arc-shaped in the depth direction, the corresponding radius of the arc is 1680mm, the corresponding radius of the outer side edge of a fan-shaped piece of the grinding plate unit 1 is 508mm, the ratio of the arc to the fan-shaped piece is 3.3, the specific range is designed according to actual needs, and the radius range corresponding to a common arc is 900-1200 mm; the radius range corresponding to the outer side arc of the grinding sheet unit 1 is 400-600 mm; the end part of the grinding tooth at one side of the inlet end 4 is a starting end 10, and the inclined surface of the end part of the starting end 10 forms an included angle with a bottom plate 13 of the grinding sheet unit 1; the positions of the end parts of the starting ends 10 of the grinding teeth form two concentric reference circles, and the radiuses of the two reference circles are different; the end parts of the starting ends 10 of the grinding teeth at the interval positions are positioned on the same reference circle, so that the starting ends 10 of the grinding teeth of the whole grinding sheet unit 1 are staggered in a long-short manner; the grinding sheet unit 1 is symmetrically provided with two bolt through holes 11, and the bolt through holes 11 are arranged on a mounting disc and are matched with the grinding sheets of the other circle in a relatively rotating way.

Firstly, defining an included angle between a tangent line of the end part of the grinding tooth and a tangent line corresponding to the circumference of the end part as an alpha angle 12, namely, the end part of the grinding tooth is provided with a tangent line on the circular arc-shaped grinding tooth, the sector piece is correspondingly provided with a circle center, an auxiliary circle is formed by taking the circle center and the end part of the grinding tooth as radiuses, the auxiliary circle is provided with a tangent line on the end part of the grinding tooth, and the included angle between the two tangent lines is the alpha angle 12, as shown in figure 1; four kinds of grinding tooth areas are arranged on the grinding plate unit 1, namely a first grinding tooth area 6, a second grinding tooth area 7, a third grinding tooth area 8 and a fourth grinding tooth area 9 in sequence, alpha angles 12 of grinding teeth in each kind of grinding tooth area are the same, when the grinding plate unit 1 forms a grinding plate of a grinding machine, the grinding tooth areas on the grinding plate of the grinding machine are periodically arranged, in each period, the alpha angles 12 corresponding to the grinding tooth areas are sequentially increased along the circumferential direction of the grinding plate unit 1, the alpha angle 12 of the first grinding tooth area 6 is 80 degrees, and the alpha angle 12 of the fourth grinding tooth area 9 is 70 degrees; the number of grinding teeth of each grinding tooth area is 13.

In the circumferential direction of the grinding sheet unit 1, the width of a first tooth groove at the middle position 3 of the grinding sheet unit 1 is larger than the width of a second tooth groove at the two end positions 2 of the grinding sheet unit 1; the tooth height of the first grinding tooth at the middle position 3 of the grinding plate unit 1 is larger than the tooth height width of the second grinding tooth at the two end positions 2 of the grinding plate unit 1; as shown in fig. 1, on each grinding plate unit 1, the number of the first grinding teeth is 0.5, and the grinding teeth in the left area of the first grinding zone 6, all the grinding teeth in the second grinding zone 7 and the grinding teeth in the right area of the third grinding zone 8 are the first grinding teeth.

The specific dimensions of the first and second grinding teeth are shown in the following table:

position of	Width of tooth	Width of groove	Height of tooth
				Two end positions 2	3.7mm	2.5mm	5.5mm
Intermediate position 3	3.7mm	2.9mm	7.5mm

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A refiner plate unit of a refiner plate, the refiner plate unit (1) being a segment and being provided with an inlet end (4) and an outlet end (5); grinding teeth are arranged on a bottom plate of the grinding sheet unit (1), and tooth grooves are formed between every two adjacent grinding teeth, and the grinding sheet unit is characterized in that the width of a first tooth groove located at the middle position (3) of the grinding sheet unit (1) is larger than that of a second tooth groove located at the two end positions (2) of the grinding sheet unit (1) along the circumferential direction of the grinding sheet unit (1); the tooth height of a first grinding tooth positioned at the middle position (3) of the grinding sheet unit (1) is larger than the tooth height width of a second grinding tooth positioned at the two end positions (2) of the grinding sheet unit (1); the tooth widths of grinding teeth on the whole grinding sheet unit (1) are the same; the grinding teeth are arc-shaped in the depth direction.

2. A refiner plate unit of a refiner plate according to claim 1, wherein the radius corresponding to the circular arc is 900-1200 mm; the radius corresponding to the arc of the outer side of the grinding plate unit (1) is 400-600 mm.

3. A refiner plate unit according to claim 1, wherein the angle between a tangent at the end of a tooth and a corresponding tangent on the circumference of the end is an angle (12); four grinding tooth areas are arranged on the grinding sheet unit (1), and the alpha angle (12) of the grinding tooth in each grinding tooth area is the same; when the grinding units (1) form a grinding disc of a pulping machine, grinding tooth areas on the grinding disc of the pulping machine are periodically arranged, and in each period, along the circumferential direction of the grinding units (1), alpha angles (12) corresponding to the grinding tooth areas are sequentially increased.

4. A refiner plate unit according to claim 3, characterized in that the angle α (12) for different tooth sections is in the range 70-80 °.

5. A refiner plate element of a refiner plate according to claim 3, characterized in that the refiner plate is formed by four plate elements (1) joined in sequence.

6. A refiner plate unit according to claim 5, characterized in that the first refiner tooth amounts to 0.49-0.54 of the total number of teeth on each refiner plate unit (1).

7. A refiner plate unit of a refiner plate according to claim 3, wherein the number of teeth per tooth zone is 13-14.

8. A refiner plate unit of a refiner plate according to claim 7, characterized in that the width of the teeth of the whole refiner plate unit (1) is 3.6-3.9 mm; the tooth height of the first grinding tooth is 7.2-7.65mm, and the groove width of the first tooth groove is 2.65-3.1 mm; the tooth height of the second grinding tooth is 5.35-7.7mm, and the groove width of the second tooth groove is 2.3-2.65 mm.

9. A refiner plate unit according to claim 1, wherein the end of the refiner teeth on the side of the inlet end (4) is a starting end (10), the end slope of which starting end (10) forms an angle with the bottom plate of the refiner plate unit (1).

10. A refiner plate unit according to claim 9, wherein the ends of the starting ends (10) of the refiner teeth are located in two concentric reference circles, and the radii of the two reference circles are different; the end parts of the starting ends (10) of the grinding teeth at the interval positions are positioned on the same reference circle, so that the starting ends (10) of the grinding teeth of the whole grinding sheet unit (1) are staggered in a long-short mode.