CN219709933U - Diversion block, grinding disc and pulping machine - Google Patents

Abstract

The utility model relates to a flow guiding block, a grinding disc and a pulping machine, wherein the flow guiding block is used for the grinding disc of the pulping machine, the grinding disc comprises an inlet end, a working surface and an outlet end, grinding teeth and grooves are formed in the grinding disc, the grinding teeth and the grooves extend from the inlet end to the outlet end through the working surface, the flow guiding block is positioned in the grooves and is arranged on one or two grinding teeth forming the grooves, the flow guiding block comprises a top surface, a bottom surface and a flow guiding body, the top surface and the bottom surface are arranged at the top and the bottom of the flow guiding body, the height of the top surface of the flow guiding block is lower than the height of the grinding teeth, the bottom surface of the flow guiding block is level with the bottom of the grooves, and the width of the flow guiding block is smaller than the width of the grooves. The diverter blocks block direct impingement of the lignocellulosic material or the like and its entrained sand on the teeth of the grinding wheel therein, and direct upward lifting of the lignocellulosic material or the like and its entrained sand toward the gap between the rotor and stator blades, thereby mitigating damage to the teeth of the grinding wheel.

Description

Diversion block, grinding disc and pulping machine

Technical Field

The utility model belongs to the field of papermaking and pulping, and particularly relates to a guide block, a grinding disc and a pulping machine.

Background

A mechanical pulp mill for separating and grinding lignocellulosic material or the like by providing a gap between a pair of rotor and stator plates mounted for relative rotation in the mill, the rotor and stator plates being adapted to separate and grind a matrix of lignocellulosic material and having a plurality of raised strips, referred to as teeth, interspersed with adjacent teeth defining a channel therebetween for conveying the material. When the mill works, the high-speed rotation of the rotor abrasive disc generates negative pressure in the tooth gaps of the rotor abrasive disc and the stator abrasive disc, part of materials in the adsorption grooves enter the gaps between the abrasive discs, wood fiber materials or the like are crushed, untwisted, cut off and crushed, and finally single fibers are obtained for subsequent papermaking, density board production and other purposes. The grinding teeth of the rotor and the stator are easy to be impacted and worn by wood fiber materials or the like and sand and stone flows wrapped by the wood fiber materials, especially the side facing the materials is severely impacted and worn, the edges and corners of the grinding teeth are rounded or broken, the resistance is increased, the energy consumption is increased, coarse stem fibers which are not separated and ground are increased, and the grinding disc can be regarded as damaged to be replaced. In order to avoid that lignocellulosic material or the like flows out of the outlet end of the groove without cutting and crushing the upper plane of the teeth, it is common practice to arrange several transverse teeth at a distance from each other in the groove for impeding the flow of lignocellulosic material or the like in the groove, forcing it to rise to the gap between the rotor and stator blades for separation and grinding. The transverse grinding teeth are added dam structures which are basically transverse to the grinding teeth and are increased in a certain distance between the grinding teeth and the longitudinal direction of the grooves in the grooves between two adjacent grinding teeth, when the grinding machine works, the rotor grinding sheets are in a high-speed rotation state, wood fiber materials or the like rising to gaps between the rotor grinding sheets and the stator grinding sheets firstly face to the front tooth side face of one side of the rotation direction of the rotor grinding sheets, the front tooth side face facing the rotation direction of the rotor grinding sheets is wrapped by the rotor grinding sheets and is collided with the front tooth side face of the stator grinding sheets facing the rotation direction of the rotor, the wood fiber materials or the like originally flowing along the outlet ends of the grooves change the flowing direction of the wood fiber materials or the like and basically flow along the transverse grinding teeth, so that the sand and stone flows of the wood fiber materials or the like almost perpendicularly collide with the front tooth side faces of the rotor grinding sheets and the stator grinding sheets and are intensively lifted upwards before the transverse grinding teeth, the grinding teeth are seriously worn at other positions, and the grinding teeth near the transverse grinding teeth are worn, and the top faces are deeply grooved and worn. The above-mentioned problems are common in many prior art blade tooth patterns with a structure similar to a transverse tooth, such as a tooth with a bend or a protruding tooth shaped like a "7" tooth, where the tooth wears particularly severely at the inner inflection point of the bend compared to other locations, directly affecting the quality of separation and grinding of lignocellulosic material or the like, as well as the energy consumption and the life of the blade.

Disclosure of Invention

In order to overcome the problems in the prior art, the utility model provides a guide block, a grinding disc and a pulping machine, which are used for solving the technical problems in the prior art.

A guide block is used for a grinding disc of a pulping machine, the grinding disc comprises an inlet end, a working surface and an outlet end, grinding teeth and grooves are arranged on the grinding disc, the grinding teeth and the grooves extend from the inlet end to the outlet end through the working surface,

wherein the flow guide block is positioned in the groove and is arranged on one or two grinding teeth forming the groove,

the flow guide block comprises a top surface, a bottom surface and a flow guide body, the top surface and the bottom surface are arranged at the top and the bottom of the flow guide body,

the height of the top surface of the flow guiding block is lower than the height of the grinding teeth, the bottom surface of the flow guiding block is leveled with the bottom of the groove, and the width of the flow guiding block is smaller than the width of the groove.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, a shape of a top surface of the flow guiding block is one of rectangular, triangular or curved.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, where the flow guiding block further includes a rib, and a number of the ribs are disposed at any end of the two ends of the flow guiding block or a position between the two ends.

In the aspect and any possible implementation manner as described above, there is further provided an implementation manner, wherein the height of the top surface of the guide block is 1/3-3/4 of the height of the grinding teeth; the maximum width of the top surface is 1/4-1/2 of the height of the upper plane of the grinding tooth.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, wherein a maximum width of the protruding ridge is 1/4 to 1/2 of a height of the upper plane of the grinding tooth.

The utility model also provides a refiner plate for a refiner, said plate comprising said diverter blocks.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, the grinding teeth on the grinding disc include a front side, an upper plane and a rear side, the fluid guide body of the fluid guide block includes a fluid guide surface and a bonding surface, the front side and/or the rear side of one or two grinding teeth are bonded with the bonding surface of the fluid guide block, and the fluid guide surface is used as the front side and/or the rear side at the position of the grinding teeth.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, wherein the upper plane, the front side and the rear side of the grinding tooth are plane or concave curved surfaces, and the grinding tooth is of a straight tooth type or a bent tooth type.

In accordance with the aspects and any possible implementation manner described above, there is further provided an implementation manner, the abrasive disc further includes transverse grinding teeth, two ends of the transverse grinding teeth are respectively connected to two grinding teeth forming a groove, and are adjacent to the guide block.

The utility model also provides a refiner comprising said blade.

The beneficial effects of the utility model are that

Compared with the prior art, the utility model has the following beneficial effects:

the utility model relates to a guide block for a grinding disc of a pulping machine, which comprises an inlet end, a working surface and an outlet end, wherein grinding teeth and grooves are arranged on the grinding disc, the grinding teeth and the grooves extend from the inlet end to the outlet end through the working surface, the guide block is positioned in the grooves and arranged on one or two grinding teeth forming the grooves, the guide block comprises a top surface, a bottom surface and a guide body, the top surface and the bottom surface are arranged at the top and the bottom of the guide body, the height of the top surface of the guide block is lower than the height of the grinding teeth, the bottom surface of the guide block is level with the bottom of the grooves, and the width of the guide block is smaller than the width of the grooves. The guide blocks arranged on the grinding teeth block the direct impact of the wood fiber material or the like and the sand and stones wrapped by the wood fiber material or the like to the grinding teeth, guide the wood fiber material or the like and the sand and stones wrapped by the wood fiber material or the stones to rise upwards and flow to the gap between the rotor and the stator grinding sheets, lighten the damage to the grinding teeth, make the wood fiber material or the like to separate and grind the wood fiber material or the like easily and frequently by crossing the upper plane of the grinding teeth, make the separation and grinding quality uniform, improve the efficiency, reduce the energy consumption of the grinding teeth and prolong the service life of the grinding sheets.

Drawings

FIG. 1 is a schematic view of a prior art abrasive sheet worn out partial tooth pattern;

FIG. 2 is a schematic view of a tooth form of a grinding plate according to an embodiment of the utility model;

FIG. 3 is a cross-sectional view of a tooth of a grinding plate in accordance with an embodiment of the utility model;

FIG. 4 is a sectional view of a second plate tooth according to an embodiment of the present utility model;

FIG. 5 is a front view of a blade according to an embodiment of the present utility model;

FIG. 6 is a front view of a second embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a three-plate tooth according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a four-plate tooth pattern according to an embodiment of the present utility model;

FIG. 9 is a fifth schematic diagram of an embodiment of the present utility model;

FIG. 10 is a diagram of a sixth embodiment of the present utility model;

FIG. 11 is a seventh schematic diagram of an embodiment of the present utility model;

fig. 12 is a schematic view of an eight-bladed tooth form according to an embodiment of the present utility model.

Detailed Description

For a better understanding of the present utility model, the present disclosure includes, but is not limited to, the following detailed description, and similar techniques and methods should be considered as falling within the scope of the present protection. In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

It should be understood that the described embodiments of the utility model are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

As shown in fig. 1, a partial perspective tooth-type schematic view of a prior art grinding sheet is provided, in which a grinding machine separates and grinds a lignocellulosic material or the like with a gap between the relative positions by a pair of rotor and stator grinding sheets mounted in the grinding machine to rotate relative to each other, the radially protruding bars on a base 1' of the rotor and stator grinding sheet 1 are grinding teeth 4, a groove 5 is formed between adjacent grinding teeth 4, and the grinding teeth 4 have two sides in the groove 5, namely a front side 8 facing a feed direction 14 and a rear side 9 on the other side. When wood fiber materials or the like are separated and ground by a grinder, negative pressure is generated in tooth gaps of the rotor grinding plate 1 by high-speed rotation of the rotor grinding plate, part of materials in the adsorption grooves 5 enter the gaps among the grinding plates 1, wood fiber materials or the like in the gaps among the grinding plates 1 are crushed, untwisted, cut and crushed by upper planes 12 of the grinding teeth 4 of the rotor grinding plate 1, the grinding teeth 4 of the rotor grinding plate 1 and the stator grinding plate 1 are easily impacted and worn by the wood fiber materials or the like and sand and stone flows wrapped by the wood fiber materials or the like, particularly the front side 8 side facing the materials is severely impacted and worn, the edges 24 of the grinding teeth 4 are rounded or crushed, so that resistance is increased, coarse peduncles which are not separated and ground are increased, and the grinding plate 1 can be regarded as damaged to be replaced. The grooves 5 are used for transporting these materials, which are carried by the centrifugal force of the rotor blade 1 and which flow from the inlet end 2 into the outlet end 3, but which do not rise completely into the gap between the blades 1, where they flow from the outlet end 3, where they break, untangle, cut, crush, in order to avoid this, it is common practice to provide a number of transverse grinding teeth 6, also called dams, in the proper position of the grooves 5, transversely to the grinding teeth 4 for blocking and limiting the continued flow of the lignocellulosic material or the like, forcing it to rise into the gap between the rotor and stator blade 1 after it has been blocked. The transverse grinding teeth 6 are arranged in the grooves 5 and across the grooves 5, connect adjacent two grinding teeth 4, and are arranged at a distance from each other in the longitudinal direction of the grinding teeth 4 and the grooves 5. Many prior art grinding plates 1 with a structure similar to the transverse grinding teeth 6 are toothed, such as with bent grinding teeth 4 or protruding grinding teeth 4 shaped like a "7" saw tooth, wherein the grinding teeth 4 with the bent grinding teeth 4 or the saw tooth-like grinding teeth 4 shaped like a "7" are shaped such that the front side 8 or the rear side 9 of the grinding teeth 4 is shaped like a grinding tooth 4 changing substantially transversely to the radial direction of the grinding plate 1 during the extension of the grinding teeth 4 from the inlet end 2 to the outlet end 3, and wherein the wood fibre material or the like flowing in the grooves 5 directly hits the grinding teeth 4 at the bending point. When the grinding machine works, the rotor grinding disc 1 is in a high-speed rotation state of 1000-2000 rpm, wood fiber materials or the like which are originally flowing along the grooves 5 and move towards the radial outer edge of the grinding disc 1, namely the radial transverse flow of wood fiber materials or the like towards the outlet end 3, enter a gap between the rotor and the stator grinding disc 1 along the transverse grinding tooth 6 or the radial transverse flow of the grinding disc 1 with the bent grinding tooth 4, and the track formed by a plane 12 on the grinding disc 1 is a multi-layer spiral line gradually moving towards the outlet end 3 as shown by an incoming material direction 14 on the grinding tooth 4 of the grinding disc 1, wherein the front side 8 of the grinding tooth 4 of the stator grinding disc 1 is collided with the stator grinding disc 1 facing towards the rotor rotating direction 11, and the wood fiber materials or the like which originally flow along the grooves 5 towards the outlet end 3 are driven and impacted by the high-speed rotation of the rotor grinding disc 1 change the radial outer edge of the grinding disc 1, namely the radial transverse flow direction towards the outlet end 3, and enter the gap between the rotor and the stator grinding disc 1 and move along the transverse grinding tooth 6 or the radial transverse flow of the grinding tooth 4 with the bent grinding tooth 4 towards the grinding disc 1, so that the wood fiber materials or the like are nearly flow towards the inlet end of the grinding tooth 4 is concentrated at the inlet end of the tooth 4 of the radial direction of the grinding tooth 4, and the tooth 4 is nearly towards the inlet end of the grinding tooth 4, and the tooth 4 is shown in the direction of the stator, and is shown in the incoming material direction 14. The nearby grinding teeth 4 are worn in advance and severely worn in comparison with other positions caused by the impact of the material flow and the sand flow, the edges 24 between the front side surfaces 8 of the grinding teeth 4 and the upper plane 12 are ground into round angles, the upper plane 12 is provided with concave grooves 15, the separation and grinding resistance is increased, the coarse stalk fibers are increased, the fiber grinding quality is poor, and the grinding disc 1 can be judged as being scrapped in advance due to poor effect. The impeding action of the transverse grinding teeth 6 or the grinding teeth 4 with the bending also entails a consumption of energy of the mill, which requires a greater torque to overcome these resistances, so that the number of transverse grinding teeth 6 is not too high.

To overcome the above-mentioned drawbacks of the prior art, the present utility model provides a diverter block for a refiner blade, the diverter block being located in a groove and being arranged on one or both of the teeth forming the groove,

the flow guide block comprises a top surface, a bottom surface and a flow guide body, the top surface and the bottom surface are arranged at the top and the bottom of the flow guide body,

the height of the top surface of the flow guiding block is lower than the height of the grinding teeth, the bottom surface of the flow guiding block is leveled with the bottom of the groove, and the width of the flow guiding block is smaller than the width of the groove.

Preferably, the top surface of the flow guiding block is one of rectangular, triangular or curved.

Preferably, the flow guiding block further comprises ribs, and a plurality of ribs are arranged at any one end part or a position between two end parts of the flow guiding block.

Preferably, the height of the top surface of the guide block is 1/3-3/4 of the height of the grinding teeth; the maximum width of the top surface is 1/4-1/2 of the height of the upper plane of the grinding tooth.

Preferably, the maximum width of the convex rib is 1/4-1/2 of the height of the plane on the grinding tooth.

Specifically, as shown in fig. 2, in order to solve the problem caused by the transverse grinding teeth 6 in the prior art, the present utility model provides a guide block 20, which is a solid body made of the same material as the grinding teeth 1, and one or several guide blocks 20 are disposed on one or two grinding teeth 4 forming the groove 5 along the feeding direction in the groove 5, specifically, each grinding tooth 4 includes a front side 8, a rear side 9 and an upper plane 12, and the guide blocks 20 are disposed on the front side 8 and/or the rear side 9 of one or two grinding teeth 4, that is, on the rear side 9 of one grinding tooth 4, or on the front side of the other grinding tooth, or on both the front side and the rear side of one grinding tooth 1. The guide block 20 is a cuboid, a triangular or a curved cube, and comprises a top surface 21, a bottom surface 18 and a guide body arranged between the top surface 21 and the bottom surface 18, wherein the guide body comprises a guide surface 22 and a bonding surface, the guide surface 22 and the bonding surface form a side surface of the guide block 21 together, and the bonding surface is bonded with the front side surface 8 and/or the rear side surface 9 of the grinding tooth 4; the top surface 21 of the deflector block 20 is lower in height than the upper plane 12 of the grinding teeth 4 but higher than the bottom 17 of the groove 5; the bottom surface 18 of the guide block 20 is flush with the bottom 17 of the groove 5, the width of the whole guide block 20 is smaller than the width of the groove 5, namely, when the guide block 20 is arranged in the groove 5 and is attached to the front side 8 and/or the rear side 9 of the grinding tooth 4, but the top surface of the guide block is lower than the upper plane of the grinding tooth 4, the width of the guide block is smaller than the width of the groove 5, and the guide block 20 is arranged on the front side 8 and the rear side 9 of the two grinding teeth 4 forming the groove 5, and when the guide block 20 is arranged on the front side 8 and the rear side 9 of the two grinding teeth 4 forming the groove 5, the guide block 20 is arranged in a staggered manner, for example, when the guide block 20 is arranged on one position of the rear side 9 of one grinding tooth 4 adjacent to the groove 5, the guide block 20 is arranged on the other position of the front side 8 of the other grinding tooth 4 adjacent to the groove 5, namely, the other position of the rear side 9 is staggered from the other position of the front side 8, so that blockage of the groove 5 is not caused; preferably, the guide blocks 20 can also be arranged at corresponding positions of the rear side 9 and the front side 8 of the two grinding teeth 4 forming the groove 5, wherein the sum of the widest or largest widths of the guide blocks 20 on the rear side 9 and the front side 8 is smaller than the width of the groove 5, so that the blockage of the groove 5 caused by the arrangement of the guide blocks 20 at the corresponding positions is avoided, and the material can normally circulate at the positions. The structural design of the height difference between the guide blocks 20 and the grooves 5 and the height difference between the guide blocks 20 and the height difference between the guide blocks 4 and the height difference between the guide blocks 20 and the height difference between the guide blocks 4 are formed into steps by the grooves 5, the top surfaces 21 of the guide blocks 20 and the height difference between the guide blocks 4 and the height difference between the guide blocks 20 and the height difference between the guide blocks 4 are formed into steps by the grooves 5, the top surfaces 21 of the guide blocks 20 and the height difference between the guide blocks 4 and the height difference between the guide blocks 20 and the height difference between the guide blocks 4.

Preferably, the deflector block 20 may also be used in conjunction with a transverse tooth (or dam). A plurality of transverse grinding teeth 6 are arranged at intervals in the grooves 5 between the adjacent grinding teeth 4, one end of each transverse grinding tooth 6 is connected with the front side 8 of one grinding tooth 4 facing the feeding direction 14, the other end of each transverse grinding tooth is connected with the rear side 9 of the other adjacent grinding tooth 4 facing away from the feeding direction 14, namely, each transverse grinding tooth 6 is arranged in the groove 5, two ends of each transverse grinding tooth 6 are respectively connected with two grinding teeth 4 adjacent to the groove 5, preferably, one side of each transverse grinding tooth 6 facing the inlet end 2 is further provided with a slope 7, each slope 7 is adjacent to the rear side 9 of the other adjacent grinding tooth 4 and each transverse grinding tooth 6 and is used for assisting the feeding material to rise upwards, each guide block 20 is arranged on the front side 8 of one grinding tooth 4 and is adjacent to each slope 7 and each transverse grinding tooth 6, and each guide block 20 is arranged in a space formed between each slope 7, each transverse grinding tooth 6 and the front side 8 of one grinding tooth 4. The deflector block 20 in fig. 2 comprises a deflector surface 22 formed by three side surfaces, a top surface 21 and a contact surface, the bottom surface 18 being integrally designed with the bottom of the groove 5, not shown in the drawing, wherein the top surface 21 is triangular, the contact surface is arranged in contact with the front side surface 8 of one of the grinding teeth 4, the deflector surface 22 intersects the front side surface 8 of the grinding tooth 4 on the side near the inlet end 2 and intersects the transverse grinding tooth 6 on the side near the outlet end 3. The height of the top surface 21 of the guide block 20 is 1/3-3/4 of the height 19 of the upper plane 12 of the grinding tooth 4. The transverse grinding teeth 6 and the guide blocks 20 enable the wood fiber material or the like which is required to rise upwards in the grooves 5 and sand and stone flow which is wrapped by the wood fiber material or the like to rise in advance before reaching the front side surface 8 of the grinding teeth 4, so that the direct impact of the rising wood fiber material or the like and sand and stone flow which is wrapped by the wood fiber material or the like on the front side surface 8 and the upper plane 12 of the grinding teeth 4 can be avoided, and the wood fiber material or the sand and stone flow which is wrapped by the wood fiber material or the like enters the gap between the rotor and the stator grinding sheets 1 after being weakened by the transverse grinding teeth 6 and the guide blocks 20, thereby further reducing the damage to the grinding teeth 4 near the position of the transverse grinding teeth 6. Because of the significant impeding effect of the transverse grinding teeth 6, the lignocellulosic material or the like rises too intensively upwards when passing in front of the transverse grinding teeth 6, the grinding teeth 4 closest to the transverse grinding teeth 6 being worn most severely, and gradually lessening towards the feed inlet end 2, for which purpose the triangular top surface 21 of the deflector block 20 has the widest width near the transverse grinding teeth 6, gradually narrowing towards the inlet end 2, so that an angle is formed between the deflector surface 22 and the front side 8 of the grinding teeth 4, until thoroughly merging into the front side 8. The wider the width of the top surface 21 of the guide block 20 is, the more obvious the impact resistance of the guide block 20 to the grinding teeth 4 is, the less the damage to the grinding teeth 4 is, and the narrower the width of the top surface 21 is, the less the impact resistance of the guide block 20 is, and the damage to the grinding teeth 4 tends to be normal, so that the problems that the other parts of the grinding teeth 4 are worn slightly and the abrasion near the transverse grinding teeth 6 is serious are solved, and the service life of the grinding disc 1 is prolonged. In this embodiment, the top surface 21 of the deflector block 20 has a length at its longest point which is less than or equal to the distance between every two transverse grinding teeth 6, and the maximum width of the top surface 21 of the deflector block 20 is less than or equal to 1/2 of the height 19 of the upper flat surface 12 of the grinding teeth 4 and gradually decreases towards the inlet end 2 until it merges into the front side 8 of the grinding teeth 4.

When the guide block 20 is in the shape of a rectangular parallelepiped and one of the sub-faces of the guide face 22 of the guide block 20 is parallel to the front face 8 of the grinding tooth 4, a strip-shaped guide block 20 is formed which is provided on part or most of the front face 8 of the grinding tooth 4 in the longitudinal direction of the grinding tooth 4 to protect the grinding tooth 4. The steps formed by the guide block 20 are more than one layer, and can be provided with a plurality of layers and a plurality of heights respectively/independently, for example, a three-layer step shape is formed between the bottom 17 of the groove 5, the sublevel parallel to the front side surface 8 and the upper plane 12 of the grinding tooth 4, in addition, two three-layer step shapes are formed between the bottom 17 of the groove 5, the other two sublevels of the guide surface 22 intersected with the front side surface 8 and the upper plane 12 of the grinding tooth 4, therefore, the shape structure of the guide block 20 changes the design that the front side surface 8 of the traditional grinding tooth 4 and the groove 5 are smooth, so that wood fiber materials or the like present a plurality of jump shapes when lifted upwards, and the impact and abrasion to the edges 24 between the front side surface 8 of the tooth 4 of the grinding disc 1 and the upper plane 12 can be weakened. Therefore, by providing a greater number of guide blocks 20 on the front side 8 and/or the rear side 9 of the grinding teeth 4, it becomes easy and frequent to separate and grind the wood fiber material or the like over the upper plane 12 of the grinding teeth 4, thereby reducing the number of the transverse grinding teeth 6 used in combination, or by using the guide blocks 20 to completely replace the transverse grinding teeth 6, the separation and grinding quality of the material is uniform, the efficiency is improved, the sharpness energy consumption of the grinding teeth 4 is small, and the service life of the grinding plate 1 is prolonged. The diverter blocks 20 are integrated with the blade 1 during the blank casting of the blade 1 at a cost effective to manufacture.

Fig. 3 is a cross-sectional view of the section A-A of the abrasive sheet of fig. 2, showing in particular the configuration of the diverter blocks 20. The base body 1' of the grinding disc 1 is provided with grinding teeth 4 and grooves 5 which are alternately arranged, a guide block 20 is arranged in front of the front side face 8 of one grinding tooth 4 connected with the groove 5 in the groove 5, the joint face of the guide block 20 is combined with the front side face 8 of the grinding tooth 4, the guide block 20 also comprises a guide face 22, a top face 21 and a bottom face 18, the bottom face 18 of the guide block 20 is leveled with the bottom 17 of the groove 5, and the part of the front side face 8 of the grinding tooth 4 above the top face 21 is reserved with a part of the front side face 8', and the top face 21 of the guide block 20 is simultaneously higher than the bottom 17 of the groove 5, so that the bottom 17, the top face 21 and a part of the front side face 8' of the groove 5 form a step shape in the groove 5. The height of the top surface 21 of the flow guiding block 20 is 1/3-3/4 of the height 19 of the upper plane 12 of the grinding tooth 4, the widest part of the top surface 21 of the flow guiding block 20 is 1/2 of the height 19 of the upper plane 12 of the grinding tooth 4, the included angle alpha between the flow guiding surface 22 of the flow guiding block 20 far away from the front side surface 8 of the grinding tooth 4 and the upper plane 12 of the grinding tooth 4 is larger than or equal to the included angle beta between the front side surface 8 of the grinding tooth 4 and the upper plane 12 of the grinding tooth 4, and the included angle alpha is basically the same as the angle beta and is approximately right-angled, and is reduced and integrated into the front side surface 8 of the grinding tooth 4 in the back projection direction. The direction line 16 indicates the movement path of the lignocellulosic material or the like in the groove 5 past the guide surface 22 and over the front side 8 of the tooth 4 and further over the upper plane 12 of the tooth 4, the guide surface 22 guiding the flow of the lignocellulosic material or the like and the sand and stone entrained therewith to rise upwards in advance by the guide block 20, whereby the guide block 20 is subjected to the direct impact force that most of the flow of lignocellulosic material or the like and the sand and stone entrained therewith should be directed against the tooth 4 here, thereby reducing damage to the tooth 4 in the vicinity of the transverse tooth 6.

As shown in fig. 4, the second embodiment is different from fig. 3 in that the guide surface 22 of the guide block 20 is almost on the same plane as the front side 8 of the grinding tooth 4, i.e., at the front side 8 of the grinding tooth 4, the joint surface of the guide block 20 is designed integrally with the front side 8 thereof, the guide surface 22 is used as the front side, and the front side 8 at the front and rear position where the guide surface 22 is connected with the front side 8 thereof is on the same plane, i.e., the guide block 20 is designed as a part of the grinding tooth 4, except that the top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4, and the guide block is arranged on the grinding tooth 4 with bent grinding tooth 4 or in a protruding shape like a zigzag or the like. The tooth 4 with the bend or the zigzag tooth 4 shaped like a "7" is the shape of the tooth 4 which changes substantially transversely to the radial direction of the blade 1 one or more times in the front side 8 or the rear side 9 of the tooth 4 during the extension of the tooth 4 from the inlet end 2 to the outlet end 3 in the radial direction of the blade 1 from the inlet end 2 to the outlet end 3, the tooth 4 being not straight, at least on the front side 8 of the tooth 4, the lignocellulosic material or the like flowing in the groove 5 will hit the tooth 4 directly at the bend and rise upwards in a concentrated manner in the vicinity of the inflection point 10. A guide block 20 is arranged between the front side 8 of each grinding tooth 4 with bending and the front side 8 of each grinding tooth, the top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4 and higher than the bottom 17 of the groove 5, thus, a step shape is formed among the bottom 17 of the groove 5, the top surface 21 of the guide block 20 and the upper plane 12 of the grinding tooth 4, any section between the starting point and the rear point of the grinding tooth 4 with bending can be obtained in the shape shown in fig. 4, the guide block 20 is arranged in the front side 8 of the grinding tooth 4 with bending, part of the front side 8' is arranged above the top surface 21 of the guide block 20, and particularly, the guide block 20 is arranged in front of the inner inflection point 10 of the bending grinding tooth 4. Because the top surface 21 of the diverter block 20 is below the upper planar surface 12 of the tooth 4, the lignocellulosic material or the like in the groove 5 easily passes over the diverter block 20 and then rises into the gap between the rotor and stator plates, increasing the separation and grinding effect and prolonging the service life thereof.

While the tooth 4 is continuously worn at its height 19 and the top surface 21 of the deflector 20 is kept flat, the top surface 21 of the deflector 20 becomes the upper plane 12 of the new tooth 4, the deflector surface 22 serves as the new front side 8 of the tooth 4, and the partial area of the tooth 4 will be widened and still continue to participate in the disintegration and grinding of the lignocellulosic material or the like, so that the lower middle part of the protruding tooth 4 with the deflector 20 with the bent tooth 4 or with a shape like a "7" sawtooth or the like is actually a relatively straight tooth 4', whereby the upper part of one tooth 4' may be provided with the bent tooth 4 or with a protruding tooth 4 with a shape like a "7" sawtooth or the like, made with at least one layer of tooth 4 of different shape, width or angle, and whereby the deflector 20 may be provided on the front side 8 and/or the rear side 9 of the tooth 4, in particular when the grinding machine and the grinding plate 1 may be operated bi-directionally.

Referring to fig. 5, a front view of a grinding blade according to an embodiment of the present utility model is shown, and the grinding blade 1 is generally different from a conventional grinding blade according to a general and combined mode in terms of size and convenience in manufacturing, wherein the general grinding blade is divided into a plurality of sub-grinding blades of the same shape and size, and the sub-grinding blades are arranged together to form a general shape for installation and use. In the present utility model, the sub-abrasive sheet is still referred to as an abrasive sheet 1 for convenience. The blade 1 shown in this figure is one of a set of rotor blades 1 or stator blades 1, the blade 1 is functionally divided into a breaking (untwining) zone 31, a rough grinding zone 33 and a finish grinding zone 34, near an inlet end 2 of the material at the inner diameter and an outlet end 3 of the material at the outer edge, the blade 1 is bolted to the mill body or rotor disk through bolt holes 37 on the back, the teeth 4 and the grooves 5 are arranged at a cutting angle according to the direction 11 of rotation of the blade 1, i.e. inclined at some angles in the radial direction of the blade 1 against the direction 11, transverse grinding teeth 6 are arranged in the grooves 5 between the teeth 4 in the rough grinding zone 33 and the finish grinding zone 34 of the blade 1, guide blocks 20 are arranged along a section of the front side 8 of the transverse grinding teeth 4 extending in the direction of the inlet end 2, i.e. guide blocks 20 with the top surfaces 21 being triangular in shape are arranged between the side of the transverse grinding teeth 6 across the grooves 5 and the front side 8 of the teeth 4, the top surfaces 21 of the guide blocks 20 are lower than the upper surfaces 12 of the teeth 4, but higher than the bottom surfaces 17 of the grooves 5, the guide blocks 20 are arranged at the bottom surfaces 17 of the grooves 5, the front surfaces of the guide blocks are raised against the top surfaces 17 and the grooves 4, and the front sides of the grooves 17 are formed to be raised against the wood material such as the top surfaces of the grooves 4, and the grooves 12 and the front surfaces of the grooves 4 are formed in the groove surfaces of the groove surfaces and the grooves 4, and the grooves 21 are formed in the front of the groove surfaces of the grooves and the grooves 20 and the grooves and the top surfaces of the wood material are formed. The guide surface 22 of the guide block 20, which is far from the front side 8 of the grinding tooth 4, forms an included angle with the front side 8 of the grinding tooth 4, and gradually tapers from the side of the transverse grinding tooth 6 facing the inlet end 2 to the side of the inlet end 2 until the guide block merges into the front side 8 of the grinding tooth 4, and the triangular top surface 21 has the largest width with the front side 8 of the grinding tooth 4 before the transverse grinding tooth 6, and then gradually tapers in width to the inlet end 2, so that the grinding tooth 4 is protected maximally before the transverse grinding tooth 6. The guiding surface 22 of the guiding block 20 gradually narrows towards the inlet end 2 until the guiding surface merges into the front side 8 of the grinding tooth 4, at this time, the guiding surface 22 is a plane, or may be a curved surface 22', or may be formed by several other surfaces, such as bending in the length direction, or forming a plane, an arc and an inclined surface in the vertical direction, so that the main purpose is to keep smooth and low consumption when the material is passed through, and of course, the proper curved surface change can make the effect of the guiding block 20 better play. Since the gap between the teeth 4 in the refining zone 34 of the rotor and stator plates is at a minimum and the wear of the teeth 4 subjected to the greatest pressure is also the greatest when the plates are in operation, the arrangement of the guide shoe 20 is concentrated in the refining zone 34 or in the part of the zone between the refining zone 34 and the coarse grinding zone 33.

As shown in fig. 6, which is a front view of a second embodiment of the present utility model, the grinding plate 1 is one of a group of rotor grinding plates or stator grinding plates, the grinding plate 1 is provided with grinding teeth 4 with bending, specifically, the grinding teeth 4 with sawtooth shape like 7 are arranged on the grinding plate 1, the bending position of the bending grinding teeth 4 in the prior art directly reaches the bottom 17 of the groove 5 from the upper plane 12 of the grinding teeth 4 to form an inclined guiding surface, and forms an inner inflection point 10 with the grinding teeth 4 extending radially, therefore, the front side 8 of the grinding teeth 4 has the area wood fiber material or the like with the structure of bending grinding teeth 4 and the sand and stone flow of the material wrapped by the material are intensively lifted upwards at the inner inflection point 10, so that the grinding teeth 4 are seriously worn near the inner inflection point 10, in order to overcome the defects existing in the prior art, the utility model arranges the guide block 20 in front of the inner inflection point 10 of the bending grinding tooth 4, and keeps the nature and smoothness of the groove 5 as much as possible, so that the guide surface 22 of the guide block 20 and the grinding tooth 4 are integrated at the middle lower part near the bottom 17 of the groove 5, one guide block 20 is arranged between the starting point and the finishing point of each grinding tooth 4 with bending, the top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4 and higher than the bottom 17 of the groove 5, the bottom 18 of the guide block 20 is leveled with the bottom 17 of the groove 5, thus, a step shape is formed among the bottom 17 of the groove 5, the top surface 21 and the upper plane 12 of the grinding tooth 4, the height of the top surface 21 of the guide block 20 is 1/3-3/4 of the height 19 of the upper plane 12 of the grinding tooth 4, the greater the bending amplitude of the grinding tooth 4 is, the deeper the depth is, the wider the width of the top surface 21 of the guide block 20 is at the place, the better guide effect of the guide block 20 is, the angle 24 formed by the front side 8' of the tooth 4 at the inflection point 10 and the upper plane 12 is thus protected, i.e. the entire tooth 4 is protected, and the lignocellulosic material or the like in the groove 5 is easily and actively lifted to the top surface 21 of the deflector block 20 and the upper plane 12 of the tooth 4, due to the small difference in height between the top surface 21 of the deflector block 20 and the upper plane 12 of the tooth 4. For a bent grinding tooth 4 with a smaller width, for example, a bent grinding tooth 4 with a width of 2.5-6 mm, the arrangement of the guide block 20 increases the strength of the middle lower part of the grinding tooth 4, the lower middle grinding tooth 4 part below the top surface 21 of the guide block 20 is called a grinding tooth 4', when the bent grinding tooth 4 is worn, the height of the upper plane 12 of the guide block is kept at the same time as that of the top surface 21 of the guide block 20, at this time, the guide block 20 continues to work as a part of the grinding tooth 4', and it can be understood that the upper part of one grinding tooth 4' can be provided with the bent grinding tooth 4 or the protruding grinding tooth 4 with a shape like a 7-shaped saw tooth and the like, so as to manufacture the grinding tooth 4 with at least one layer of grinding tooth 4 with different shapes, widths or angles, and the guide block 20 can be arranged on the front side 8 and/or the rear side 9 of the grinding tooth 4. For plates having a bi-directional rotation direction 11, the teeth 4 and grooves 5 are substantially coincident with the radial direction of the plate 1, and the diverter blocks 20 of the teeth 4 of the plate 1 may be provided on both the leading side 8 and the trailing side 9 of the teeth 4. For the abrasive disc with only the unidirectional rotation direction 11, the guide blocks 20 of the abrasive teeth 4 of the abrasive disc 1 can be arranged on both the front side 8 and the rear side 9 of the abrasive teeth 4, for example, the guide blocks 20 are arranged on the rear side 9 of the abrasive teeth 4 of the rough grinding area 33, so that the strength of the middle and lower parts of the abrasive teeth 4 of the rough grinding area 33 is increased, and the guide blocks 20 are used as a widened part of the abrasive teeth 4' to continue to work when the upper plane 12 of the abrasive teeth 4 is worn and is leveled with the top surface 21 of the guide blocks 20, thereby prolonging the service life of the abrasive disc 1.

Embodiment III: as shown in fig. 7, the front side 8 of the grinding tooth 4 is provided with a guide block 20, which includes a bottom surface 18, a guide surface 22, a bonding surface and a top surface 21, wherein the guide surface 22 of the guide block 20 has a larger angle α than the front side 8 of the grinding tooth 4, the connection between the top surface 21 of the guide block 20 and the front side 8' of the grinding tooth 4 above the top surface 21 and the guide surface 22 adopts a circular arc transition, the top surface 21 has a concave circular arc curved surface, i.e. the top surface 21 is concave, the top surface 21 is lower than the upper plane 12 of the grinding tooth 4 and higher than the bottom 17 of the groove 5, and a circular arc concave step is formed among the bottom 17, the top surface 21 and the upper plane 12 of the grinding tooth 4 because the top surface 21 is concave curved surface. This figure shows a deflector 20 with an angle α greater than angle β and a rounded concave top surface 21, the directional line 16 being the trajectory of the lignocellulosic material or the like in the channel 5 from the front side 8 of the tooth 4 to the upper plane 12 of the tooth 4 after passing over the deflector surface 22, turbulence and wave motion occurring when the front side 8' of the tooth 4 is advanced to the upper plane 12 of the tooth 4, which turbulence has benefits in particular circumstances of blade separation and grinding of lignocellulosic material or the like, such as extending the residence time of lignocellulosic material or the like between blades, forming a rotating vortex that is beneficial for separating off the dislodged cellulose, etc., in addition to having the effect of protecting the tooth 4.

As shown in fig. 8, a grinding disc 1 includes grinding teeth 4 and grooves 5, and a guide block 20 and a transverse grinding tooth 6 are disposed in the grooves 5, the guide block 20 is a cuboid, and includes a top surface 21, a bottom surface 18, a side surface (referred to as an upper side surface) close to the transverse grinding tooth 6 and parallel to the transverse side surface of the transverse grinding tooth 6, a side surface 23 (referred to as a lower side surface) corresponding to the upper side surface and far from the transverse grinding tooth 6, and a side surface (referred to as a parallel side surface) and an abutting surface, which are disposed between the upper side surface and the lower side surface and parallel to the front side surface 8 of the grinding tooth 4, wherein the upper side surface, the parallel side surface and the lower side surface 23 are collectively referred to as a guide surface 22, the abutting surface of the guide block 20 is abutted with the front side surface 8 of the grinding tooth 4, the bottom surface 18 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4 and higher than the bottom 17 of the grooves 5, the bottom surface 18 of the guide block 20 is leveled with the bottom 17 of the grooves 5, the top surface 21 of the guide block 20 and the upper plane 12 of the grinding tooth 4 form a step shape, the parallel side surface is parallel to the front side surface 8 of the grinding tooth 4, and the cuboid guide block 20 is disposed on the front side surface or partially protects the front tooth 4 on the longitudinal or the front part of the grinding tooth 4. The guide blocks 20 can be arranged in more than one layer in a stepped manner and can be arranged in multiple layers and multiple heights respectively/independently, and the arrangement changes the flat and smooth design of the front side 8 of the traditional grinding tooth 4 and the grooves 5, so that wood fiber materials or the like can present multiple jump-type materials when lifted upwards, and the direct impact and abrasion to the edge angle 24 between the front side 8 of the grinding tooth 4 of the grinding disc 1 and the upper plane 12 can be reduced. The guide block 20 arranged in front of the front side 8 of the grinding tooth 4 and parallel to the front side can lead the grinding tooth 4 of the upper plane 12 of the grinding tooth 4, which is higher than the top surface 21 of the guide block 20, to face incoming material delay, and the lower side 23 of the guide block 20 arranged in the direction facing the inlet end 2 is used as an end guide surface to guide wood fiber materials or the like to rise upwards in advance, so that the damage of the grinding tooth 4 near the transverse grinding tooth 6 is relieved.

As shown in fig. 9, 10 and 11, the fifth, sixth and seventh embodiments are respectively embodiments in which the front side 8 or the rear side 9 of the grinding tooth 4 is not flat, but has a concave curved surface, that is to say, the front side 8 and/or the rear side 9 is not flat, and the concave shape is rectangular, triangular or circular arc, and accordingly, the guide blocks 20 are arranged on the front side 8 and/or the rear side 9 of the grinding tooth 4, which are bent or curved, in the process of extending the grinding tooth 4 from the inlet end 2 to the outlet end 3, unlike the case in which the front side 8 and/or the rear side 9 are flat, as described in the previous embodiments, and the contact surface of the guide blocks 20 is also curved, and the contact surface of the guide blocks 20 is curved, as shown in fig. 22, of the front side 8 and/or the rear side 9 is flat, as shown in the front side 22, when the front side 8 and/or the rear side 9 of the grinding tooth 4 is/are not flat, and the concave shape is provided on the front side 8 and/or the rear side 9 of the grinding tooth 4 is/is changed substantially circular arc; or a combination of straight planes and curved planes; the flow guiding surface 22 is a flat surface as shown in fig. 10, while the flow guiding surface 22' is a curved surface, and the two surfaces are adjacently connected and combined; the combination of curved surfaces with different radians is also possible, as shown in fig. 11, the guide surface 22 is a curved surface, and the guide surface 22 'is also a curved surface, which are adjacently connected and combined, but the radian of the curved surfaces of the guide surfaces 22 and 22' is different, and the guide block 20 is set to be a cuboid, a triangle, a cube or an arc according to the different shapes of the concave on the front side surface 8 and/or the rear side surface 9, and accordingly, the top surface 21 is a rectangle, a triangle, a square or a concave arc. Therefore, in the grinding disc 1 with the bent grinding teeth 4, the guide blocks 20 are arranged in front of the inner inflection point 10 between the starting point and the end point of each bent grinding tooth 4, natural and smooth grooves 5 are achieved as much as possible, the guide surfaces 22 of the guide blocks 20 and the middle lower part of the grinding teeth 4 are integrated into a whole, the top surfaces 21 of the guide blocks 20 are lower than the upper plane 12 of the grinding teeth 4, the guide blocks 20 and the bottoms of the grooves 5 form a step shape together, the guide blocks 20 are arranged on the front side surface 8 and/or the rear side surface 9 of the grinding teeth 4 in a head-to-tail mode or at a distance from each other to form a section of the grinding teeth 4 with the bending, the guide blocks 20 are embedded into the front side surface 8 and/or the rear side surface 9 of the grinding teeth 4, namely, on the grinding disc 1, the upper part of one straight grinding tooth 4 'is provided with the bent grinding teeth 4, the guide surfaces of the guide blocks 20 are made into one flat guide surface 22, the guide surfaces 22 are bent or the bent surfaces 22', and the total length of the guide blocks 4 is prolonged, and the total length of the guide surfaces is prolonged, and the guide surfaces of the guide blocks are not longer than the straight grinding teeth 4.

As shown in fig. 12, in the eighth embodiment, unlike the previous embodiment, the guide block 20 provided on the teeth 4 of the present embodiment further includes at least one rib 35, and due to the presence of the rib 35, the guide surface 22 of the guide block 20 is a curved surface including at least one protrusion, so that the excessive arrangement of the transverse teeth 6 between the teeth 4 of the grinding plate 1 in the prior art brings great resistance and significant energy consumption to the grinding machine, in order to reduce or eliminate the arrangement of the transverse teeth 6, and also can obtain good separation and grinding effects brought by the transverse teeth 6, specifically, the guide block 20 is provided with at least one rib 35 at a position in the middle or two ends of the guide surface 22, the cross section of the rib 35 is rectangular, circular arc or triangular, the rib 35 extends vertically downward from the top surface 21 of the guide block 20 to the bottom 17 of the groove 5, and the present embodiment can provide such guide block 20 with the rib 35 on the teeth 4 of the whole grinding plate 1, wherein the rib 35 is provided at a middle or end position of the guide surface 22 of the guide block 20; it is also possible to alternate the deflector blocks 20 of the previous embodiment with such deflector blocks 20 with ribs 35 on the tooth 4, i.e. to alternate deflector blocks 20 without ribs 35 and deflector blocks 20 with ribs 35 on the front side 8 and/or rear side 9 of the tooth 4, wherein the front side 8 and/or rear side 9 can be either planar or curved, the distance 39 of the ribs 35 protruding from the deflector surface 22 is 1/4 to 1/2 of the height 19 of the upper plane 12 of the tooth 4 from the bottom 17, and the width 38 of the ribs 35 is equal or nearly equal to the width of the tooth 4, but smaller than the width of the grooves 5. Preferably, the rib 35 continues to abut against the rear side 9 of the adjacent other tooth 4 across the bottom 17 of the groove 5, forming a rib 40. The ribs 35 are shown disposed at the ends of the triangular body of the deflector block 20, with a plurality of deflector blocks 20 spaced apart from each other without ribs 35, wherein the ribs 35 have a semicircular cross section. A portion of the lignocellulosic material or the like that flows rapidly through the grooves 5 towards the outlet end 3 reaches the vicinity of the ribs 35 and encounters an obstruction of the sides 36 of the ribs 35 to reflect or rise upwards, providing the opportunity for entry into the deflector block 20 and into the upper plane 12 of the tooth 4, which arrangement does not require significant energy consumption, while maintaining a partial throughput of the grooves 5, maintaining a large throughput, unlike the prior art where the transverse tooth 6 has a large obstruction. The use of a number of baffles 20 with ribs 35 provides for a more excellent separation and polishing of lignocellulosic or the like materials. The height of the top surface 21 of the guide block 20 is 1/3-3/4 of the height 19 of the upper plane 12 of the grinding tooth 4, the structural arrangement obviously improves the strength, impact resistance, wear resistance and the service life of the grinding tooth 4 which is straight or bent, meanwhile, the guide block 20 with the convex rib 35 protects the grinding tooth 4, and the convex rib 35 extends from the upper plane 12 of the grinding tooth 4 to the bottom 17 of the groove 5 or continuously crosses the bottom 17 of the groove 5 to abut against the rear side surface 9 of the adjacent grinding tooth 4, so that the transverse grinding tooth 6 arranged in the prior art can be reduced or completely replaced, wood fiber materials or the like are promoted to rise upwards, and the wood fiber materials are easier and more actively enter the top surface 21 of the guide block 20 and the upper plane 12 of the grinding tooth 4, thereby reducing energy consumption and maintaining larger yield.

The utility model also provides a pulping machine which comprises the abrasive disc provided with the guide blocks or combined with the transverse grinding teeth, and the pulping machine adopting the abrasive disc can prevent wood fiber materials or the like from impacting the grinding teeth during pulping, so that the damage to the grinding teeth is reduced, the productivity is improved, the service life of the abrasive disc is prolonged, and the production cost is saved.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the disclosed forms of the utility model, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the claimed utility model, either as described above or as a matter of technical or intellectual development in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims (10)

1. A flow guiding block is used for a grinding disc of a pulping machine, and is characterized in that the grinding disc comprises an inlet end, a working surface and an outlet end, grinding teeth and grooves are arranged on the grinding disc, the grinding teeth and the grooves extend from the inlet end to the outlet end through the working surface,

Wherein the flow guide block is positioned in the groove and is arranged on one or two grinding teeth forming the groove,

the flow guide block comprises a top surface, a bottom surface and a flow guide body, the top surface and the bottom surface are arranged at the top and the bottom of the flow guide body,

the height of the top surface of the flow guiding block is lower than the height of the grinding teeth, the bottom surface of the flow guiding block is leveled with the bottom of the groove, and the width of the flow guiding block is smaller than the width of the groove.

2. The deflector block of claim 1, wherein the top surface of the deflector block is one of rectangular, triangular, or curved in shape.

3. The deflector block of claim 1 or 2, further comprising ribs thereon, wherein a plurality of the ribs are disposed at either end of the deflector block or at a position between the ends.

4. The deflector block of claim 1, wherein the deflector block has a top surface height of 1/3 to 3/4 of the height of the grinding teeth; the maximum width of the top surface is 1/4-1/2 of the height of the upper plane of the grinding tooth.

5. A diverter block as defined in claim 3, wherein said rib has a maximum width of 1/4 to 1/2 of the height of the upper flat surface of said tooth.

6. A refiner plate for a refiner, wherein the plate comprises a diverter block according to any one of claims 1-5.

7. A refiner plate for a refiner according to claim 6, wherein the teeth on the plate comprise a front side, an upper plane and a back side, the flow body of the inducer comprises a flow guiding surface and a contact surface, the front side and/or the back side of one or both teeth being in contact with the contact surface of the inducer, the flow guiding surface being the front side and/or the back side at the location of the teeth.

8. A refiner plate for a refiner of claim 7 wherein the upper plane, the front side and the back side of the teeth are planar or concave curved surfaces.

9. A refiner plate for a refiner of claim 6 further comprising transverse teeth connected at each end to two teeth forming a groove and adjacent to the diverter block.

10. A refiner comprising a refiner plate of any one of claims 6-9.