A flow guide block, grinding plate and a grinding machine

Abstract

The invention relates to a flow guide, a grinding plate and a grinding machine. The flow guide is arranged in a groove of the grinding plate, and is arranged on one or two grinding teeth forming the groove. The flow guide comprises a top surface, a bottom surface and a flow guide body. The top surface and the bottom surface are arranged on the top and the bottom of the flow guide body. The height of the top surface of the flow guide is lower than the height of the grinding teeth. The bottom surface of the flow guide is flush with the bottom of the groove. The width of the flow guide is smaller than the width of the groove. The flow guide blocks the direct impact of the wood fiber material or the like and the sand and stone wrapped therein on the grinding teeth, and guides the wood fiber material or the like and the sand and stone wrapped therein to rise upward to the gap between the rotor and the stator grinding plates, thereby reducing the damage to the grinding teeth.

Description

Technical Field

[0001] This invention belongs to the field of papermaking and pulping, and specifically relates to a flow guide block, a grinding disc, and a pulping machine. Background Technology

[0002] A pulp mill for producing mechanical pulp separates and grinds wood fiber materials or similar materials through the gap between a pair of rotor and stator grinding discs installed opposite each other and rotating within the mill. The rotor and stator grinding discs have numerous raised strips scattered on their matrix for separating and grinding the wood fiber material; these raised strips are called grinding teeth. A groove is formed between adjacent grinding teeth to transport the material. During mill operation, the high-speed rotation of the rotor grinding discs generates negative pressure in the gap between the rotor and stator grinding teeth, drawing some material from the grooves into the gap between the grinding discs. This process crushes, loosens, cuts, and crushes the wood fiber material or similar materials, ultimately yielding individual fibers for subsequent applications such as papermaking and the production of MDF (medium-density fiberboard). The grinding teeth of the rotor and stator grinding discs are easily impacted and worn by the wood fiber material or similar materials and the sand and gravel they carry, especially on the side facing the material. The edges of the grinding teeth are rounded or broken, resulting in increased resistance, increased energy consumption, and an increase in unseparated and unground coarse fibers. If this occurs, the grinding discs are considered damaged and replaced. To prevent wood fiber materials or similar materials from flowing out of the groove from the outlet without being cut and crushed by the upper surface of the grinding teeth, the usual method is to set several transverse grinding teeth at intervals in the groove to hinder the flow of wood fiber materials or similar materials in the groove, forcing them to rise to the gap between the rotor grinding plates and the stator grinding plates to participate in separation and grinding. Transverse grinding teeth are essentially transverse dam structures added to the grooves between two adjacent grinding teeth, spaced some distance apart in the longitudinal direction of the grinding teeth and grooves. When the mill is working, the rotor grinding discs are rotating at high speed. Wood fiber material or similar materials rising into the gap between the rotor grinding discs and stator grinding discs first encounter the front side of the grinding teeth on the side of the rotor grinding disc's rotation direction, and are carried by the rotor grinding discs to collide with the front side of the grinding teeth on the opposite side of the stator grinding discs' rotation direction. The wood fiber material or similar materials that originally flowed along the grooves towards the outlet end change their flow direction and flow basically in the direction of the transverse grinding teeth. Therefore, the wood fiber material or similar materials and the sand and gravel flow they carry impact the front side of the rotor grinding discs and stator grinding disc grinding teeth almost vertically, and rise too concentratedly in front of the transverse grinding teeth, causing the grinding teeth near the transverse grinding teeth to wear more severely than other positions, and deep groove-like wear will appear on the top surface. In the existing technology, many grinding disc tooth profiles with transverse grinding tooth structures generally have the above-mentioned problems. For example, grinding teeth with bends or protruding grinding teeth shaped like the "7" serrations, the grinding teeth at the inner bend point are worn more severely than other positions, which directly affects the separation and grinding quality of wood fiber materials or similar materials, as well as energy consumption and the service life of the grinding disc. Summary of the Invention

[0003] In order to overcome the above-mentioned problems in the prior art, the present invention provides a flow guide block, a grinding disc, and a refining machine to solve the technical problems existing in the prior art.

[0004] A flow guide block is provided for a grinding disc in a pulp refiner. The grinding disc includes an inlet end, a working surface, and an outlet end. Grinding teeth and grooves are provided on the grinding disc, extending from the inlet end through the working surface towards the outlet end. The grinding teeth and grooves are used for grinding fibrous materials. The grinding teeth include a front side, an upper surface, and a rear side.

[0005] The guide block is located in the groove and is disposed on the front and / or rear sides of one or two grinding teeth forming the groove, for blocking the impact of the fiber material on the grinding teeth at the location.

[0006] The guide block includes a top surface, a bottom surface, and a guide body, wherein the top surface and the bottom surface are disposed at the top and bottom of the guide body;

[0007] The guide fluid includes a guide surface and a contact surface, wherein the contact surface is in contact with the front and / or rear sides of the grinding tooth.

[0008] The top surface of the guide block is lower than the top surface of the grinding tooth, the bottom surface of the guide block is flush with the bottom of the groove, and the angle between the guide surface and the upper plane of the grinding tooth is greater than or equal to the angle between the front and / or rear sides of the grinding tooth and the upper plane of the grinding tooth.

[0009] In addition to the aspects described above and any possible implementations, a further implementation is provided in which the top surface of the guide block is shaped as a rectangle, a triangle, or a curved surface.

[0010] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the guide block further includes protruding ridges, and a plurality of the protruding ridges are disposed at either end or between the two ends of the guide block.

[0011] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the height of the top surface of the guide block is 1 / 3 to 3 / 4 of the height of the upper plane of the grinding tooth; and the maximum width of the top surface is 1 / 4 to 1 / 2 of the height of the upper plane of the grinding tooth.

[0012] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the maximum width of the convex ridge is 1 / 4 to 1 / 2 of the height of the upper plane of the grinding tooth.

[0013] The present invention also provides a grinding disc for a pulping machine, the grinding disc comprising the aforementioned guide block.

[0014] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the upper plane, front side, and rear side of the grinding tooth are planes or concave curved surfaces, and the grinding tooth is a straight tooth type or a bent tooth type.

[0015] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the grinding disc further includes transverse grinding teeth, the two ends of which are respectively connected to the two grinding teeth forming the groove and are adjacent to the guide block.

[0016] In addition to the aspects described above and any possible implementations, a further implementation is provided in which the grinding disc further includes a ramp block disposed in the groove, located on the same side of the transverse grinding teeth and adjacent to the guide block.

[0017] The present invention also provides a pulping machine, the pulping machine including the aforementioned grinding discs.

[0018] Beneficial effects of the present invention

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention relates to a flow guide block for a grinding disc in a refiner. The grinding disc includes an inlet end, a working surface, and an outlet end. The grinding disc is provided with grinding teeth and grooves, which extend from the inlet end through the working surface towards the outlet end. The flow guide block is located in the groove and is disposed on one or two grinding teeth forming the groove. The flow guide block includes a top surface, a bottom surface, and a flow guide. The top surface and the bottom surface are disposed at the top and bottom of the flow guide. The height of the top surface of the flow guide block is lower than the height of the grinding teeth. The bottom surface of the flow guide block is flush with the bottom of the groove. The width of the flow guide block is smaller than the width of the groove. The guide blocks on the grinding teeth prevent the direct impact of wood fiber materials or similar materials and the sand they carry on the grinding teeth. They guide the wood fiber materials or similar materials and the sand they carry to rise and flow into the gap between the rotor and stator grinding plates, reducing damage to the grinding teeth. This also makes it easier and more frequent for the wood fiber materials or similar materials to roll over the upper surface of the grinding teeth for separation and grinding, resulting in uniform separation and grinding quality, improved efficiency, sharp grinding teeth, low energy consumption, and extended service life of the grinding plates. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a worn tooth profile on a prior art grinding disc.

[0022] Figure 2 This is a schematic diagram of the grinding disc tooth profile according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a cross-sectional view of the grinding disc tooth profile according to Embodiment 1 of the present invention;

[0024] Figure 4 This is a cross-sectional view of the grinding disc tooth profile according to Embodiment 2 of the present invention;

[0025] Figure 5 This is a front view of the grinding disc according to Embodiment 1 of the present invention;

[0026] Figure 6 This is a front view of the grinding disc according to Embodiment 2 of the present invention;

[0027] Figure 7 This is a cross-sectional view of the grinding disc tooth profile in Embodiment 3 of the present invention;

[0028] Figure 8 This is a schematic diagram of the grinding disc tooth profile in Embodiment 4 of the present invention;

[0029] Figure 9 This is a schematic diagram of Embodiment 5 of the present invention;

[0030] Figure 10 This is a schematic diagram of Embodiment Six of the present invention;

[0031] Figure 11 This is a schematic diagram of Embodiment Seven of the present invention;

[0032] Figure 12 This is a schematic diagram of the grinding disc tooth profile in Embodiment 8 of the present invention. Detailed Implementation

[0033] To better understand the technical solution of this invention, the content of this invention includes, but is not limited to, the specific embodiments described below. Similar technologies and methods should be considered within the scope of protection of this invention. To make the technical problems to be solved, the technical solutions, and advantages of this invention clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0034] It should be understood that the embodiments described in this invention are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0035] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0036] like Figure 1As shown, the prior art grinding disc has a partial three-dimensional tooth profile. The grinding mill uses a pair of rotor grinding discs and stator grinding discs that rotate relative to each other to separate and grind wood fiber materials or similar materials by utilizing the gap between them when they are relatively arranged. The radially protruding strips on the base 1' of the rotor and stator grinding discs are grinding teeth 4. A groove 5 is formed between adjacent grinding teeth 4. The grinding teeth 4 have two sides in the groove 5, namely the front side 8 facing the material direction 14 and the rear side 9 on the other side. When the mill separates and grinds wood fiber materials or similar materials, the high-speed rotation of the rotor grinding discs generates negative pressure in the gap between the grinding teeth of the rotor and stator grinding discs 1. Some of the material in the adsorption grooves 5 enters the gap between the grinding discs 1. The upper surface 12 of the grinding teeth 4 of the rotor and stator grinding discs 1 crushes, loosens, cuts, and crushes the wood fiber materials or similar materials in the gap between the grinding discs 1. The grinding teeth 4 of the rotor and stator grinding discs 1 are easily impacted and worn by the wood fiber materials or similar materials and the sand and gravel flow they carry. In particular, the impact and wear on the front side 8 facing the material are severe. The edges 24 of the grinding teeth 4 are rounded or broken, resulting in increased resistance, increased energy consumption, and more coarse fibers that have not been separated and ground. The grinding discs 1 will be considered damaged and replaced and removed from the machine. The groove 5 is used to transport materials such as wood fiber materials. Driven by the centrifugal force of the rotor grinding plates 1, these materials enter from the inlet end 2 and flow out from the outlet end 3. However, much of this wood fiber material does not completely rise into the gap between the grinding plates 1 to be broken, dispersed, cut, and crushed before flowing out from the outlet end 3. To avoid this, a common method is to install several transverse grinding teeth 6, also known as dams, at appropriate locations in the groove 5, arranged transversely to the grinding teeth 4. These dams block and restrict the continued flow of the wood fiber material, forcing it to rise into the gap between the rotor and stator grinding plates 1 after being obstructed. The transverse grinding teeth 6 are located in the groove 5 and span across it, connecting two adjacent grinding teeth 4, and are spaced apart at a certain distance in the longitudinal direction between the grinding teeth 4 and the groove 5. In the prior art, many grinding discs 1 have tooth profiles with a structure similar to transverse grinding teeth 6, such as grinding teeth 4 with bends or protruding grinding teeth 4 in the shape of a "7" serration. The grinding teeth 4 with bends or grinding teeth 4 in the shape of a "7" serration are grinding teeth 4 whose shape changes substantially transversely to the radial direction of the grinding disc 1 as the grinding teeth 4 extend radially from the inlet end 2 to the outlet end 3. The grinding teeth 4 are not straight as they extend from the inlet end 2 to the outlet end 3, at least not on the front side 8 of the grinding teeth 4. Wood fiber material or similar materials flowing in the groove 5 will directly hit the bends of the grinding teeth 4.When the mill is working, the rotor grinding disc 1 rotates at a high speed of 1000-2000 rpm. When wood fiber material or similar material encounters the transverse grinding teeth 6 or the grinding teeth 4 with bends and rises upwards, it first faces the side of the grinding teeth 4 of the rotor grinding disc 1, that is, the front side 8 of the grinding teeth 4 of the rotor grinding disc 1 on the side of the rotation direction 11. It is then carried and impacted into the front side 8 of the grinding teeth 4 of the stator grinding disc 1 facing the rotor rotation direction 11. The wood fiber material or similar material that originally flowed along the groove 5 towards the outlet end 3 is changed under the high-speed rotation and impact of the rotor grinding disc 1. The material flows in the radial direction of the outer edge of the grinding disc 1 towards the outlet end 3, entering the gap between the rotor and stator grinding discs 1 and flowing radially laterally along the transverse grinding teeth 6 or the bent grinding teeth 4. The trajectory formed on the upper plane 12 of the grinding teeth 4 of the grinding disc 1 is a multi-layered spiral line that gradually moves towards the outlet end 3, as shown in the incoming material direction 14. Therefore, the wood fiber material or similar materials and the sand and gravel they carry actually impact the rotor grinding disc 1 and the front side 8 of the grinding teeth 4 of the stator grinding disc 1 almost perpendicularly, and rise up concentrated in front of the transverse grinding teeth 6 or at the inner inflection point 10 of the bent grinding teeth 4. Under the impact of the above-mentioned material flow and sand and gravel flow, the nearby grinding teeth 4 are worn prematurely and severely compared to other positions. The corner 24 between the front side 8 of the grinding teeth 4 and the upper plane 12 is ground into a rounded corner, and the upper plane 12 has a recessed groove 15. The resistance to separation and grinding increases, energy consumption increases, coarse fibers increase, and the fiber grinding quality is poor. The grinding disc 1 will be judged as having poor effect and will be scrapped prematurely. The obstructive effect of the transverse grinding teeth 6 or the grinding teeth 4 with bends also leads to the consumption of mill energy. The mill needs to provide greater torque to overcome these resistances, so the number of transverse grinding teeth 6 should not be too large.

[0037] To overcome the aforementioned deficiencies of the prior art, the present invention provides a guide block for a grinding disc in a pulper. The grinding disc includes an inlet end, a working surface, and an outlet end. Grinding teeth and grooves are provided on the grinding disc, extending from the inlet end through the working surface towards the outlet end. The grinding teeth and grooves are used for grinding fibrous materials. The grinding teeth include a front side, an upper surface, and a rear side.

[0038] The guide block is located in the groove and is disposed on the front and / or rear sides of one or two grinding teeth forming the groove, for blocking the impact of the fiber material on the grinding teeth at the location.

[0039] The guide block includes a top surface, a bottom surface, and a guide body, wherein the top surface and the bottom surface are disposed at the top and bottom of the guide body;

[0040] The guide fluid includes a guide surface and a contact surface, wherein the contact surface is in contact with the front and / or rear sides of the grinding tooth.

[0041] The top surface of the guide block is lower than the top surface of the grinding tooth, the bottom surface of the guide block is flush with the bottom of the groove, and the angle between the guide surface and the upper plane of the grinding tooth is greater than or equal to the angle between the front and / or rear sides of the grinding tooth and the upper plane of the grinding tooth.

[0042] Preferably, the top surface of the guide block is rectangular, triangular, or curved.

[0043] Preferably, the guide block further includes protruding ridges, and a plurality of the protruding ridges are disposed at any end or between the two ends of the guide block.

[0044] Preferably, the top surface height of the guide block is 1 / 3 to 3 / 4 of the height of the grinding tooth; the maximum width of the top surface is 1 / 4 to 1 / 2 of the height of the upper plane of the grinding tooth.

[0045] Preferably, the maximum width of the convex ridge is 1 / 4 to 1 / 2 of the height of the upper surface of the grinding tooth.

[0046] Specifically, such as Figure 2The above is an embodiment of the present invention. In order to change the problems caused by the use of transverse grinding teeth in the prior art, the present invention provides a flow guide block 20, which is a solid body and made of the same material as the grinding teeth. One or more flow guide blocks 20 are provided on one or two grinding teeth 4 forming the groove 5 along the material feeding direction. Specifically, each grinding tooth 4 includes a front side 8, a rear side 9 and an upper plane 12. The flow guide block 20 is provided on the front side 8 and / or the rear side 9 of one or two grinding teeth 4, that is, it is provided on the rear side 9 of one grinding tooth 4, or on the front side of another grinding tooth, or on both the front and rear sides of one grinding tooth. The guide block 20 is a cube, which can be a cuboid, a triangular prism, or a cube with curved surfaces. It includes a top surface 21, a bottom surface 18, and a guide fluid between the top surface 21 and the bottom surface 18. The guide fluid includes a guide surface 22 and a contact surface, wherein the guide surface 22 and the contact surface together form the side surface of the guide block 21. The contact surface is in contact with the front side surface 8 and / or the rear side surface 9 of the grinding teeth 4. The top surface 21 of the guide block 20 is lower 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 entire guide block 20 is smaller than the width of the groove 5. That is, the guide block 20 is in contact with the front side surface 8 and / or the rear side surface of the grinding teeth 4 in the groove 5, but its top surface 21 is lower than the upper plane of the grinding teeth 4 and its width is smaller than the width of the groove 5. This is different from the structure of the transverse grinding teeth 6. When guide blocks 20 are provided on both the front side 8 and the rear side 9, the positions of the guide blocks 20 on the front side 8 and the rear side 9 can be staggered. For example, in a groove 5, if a guide block 20 is provided at a certain position on the rear side 9 of one of the grinding teeth 4 adjacent to the groove 5, then a guide block 20 is provided at another position on the front side 8 of the other grinding tooth 4 adjacent to the groove 5. That is, the certain position on the rear side 9 and the other position on the front side 8 are staggered, so as not to cause blockage of the groove 5. Preferably, guide blocks 20 can also be provided at corresponding positions on the rear side 9 and the front side 8 of the two grinding teeth 4 forming the groove 5. In this case, the sum of the widest or largest width of the guide blocks 20 on the rear side 9 and the front side 8 is less than the width of the groove 5, so as not to cause blockage of the groove 5 at the corresponding position due to the provision of guide blocks 20, so that the material can still flow normally at this position.The structural design of the height difference between the guide block 20, the groove 5, and the grinding teeth 4 creates a step between the bottom 17 of the groove 5, the top surface 21 of the guide block 20, and the upper surface 12 of the grinding teeth 4. This facilitates the upward movement of wood fiber materials or similar materials at this location. In the groove 5 on the grinding disc 1, with the guide block 20 on the grinding teeth 4 and without any transverse grinding teeth 6, the guide block 20 replaces the transverse grinding teeth 6 used in the prior art. This promotes the upward movement of wood fiber materials or similar materials at the location of the guide block 20, making it easier for them to rise. The material actively enters the area where the steps are formed by the bottom 17 of the groove 5, the top surface 21 of the guide block 20, and the upper surface 12 of the grinding tooth 4. This causes the wood fiber material or similar material and the sand and gravel it carries to rise in the groove 5 before reaching the front side 8 of the grinding tooth 4. This avoids the direct impact of the rising wood fiber material or similar material and the sand and gravel it carries on the front side 8 and the upper surface 12 of the grinding tooth 4. After being weakened, it enters the gap between the rotor and the stator grinding plate 1, thereby further reducing the damage to the grinding tooth 4.

[0047] Preferably, the guide block 20 can also be used in conjunction with the transverse grinding teeth 6 (or a dam). Several transverse grinding teeth 6 are arranged at intervals in the groove 5 between adjacent grinding teeth 4. One end of each transverse grinding tooth 6 is connected to the front side 8 of one of the grinding teeth 4 facing the material inlet direction 14, and the other end is connected to the rear side 9 of another adjacent grinding tooth 4 facing away from the material inlet direction 14. That is, the transverse grinding teeth 6 are arranged in the groove 5, with each end connected to two grinding teeth 4 adjacent to the groove 5. Preferably, a ramp 7 is also provided on the side of the transverse grinding tooth 6 facing the inlet end 2. The ramp 7 is adjacent to the rear side 9 of another adjacent grinding tooth 4 and the transverse grinding tooth 6, assisting the material to rise upwards. The guide block 20 is arranged on the front side 8 of one of the grinding teeth 4, and is adjacent to both the ramp 7 and the transverse grinding tooth 6. That is, the guide block 20 is arranged in the space formed between the ramp 7, the transverse grinding tooth 6, and the front side 8 of one of the grinding teeth 4. Figure 2The guide block 20 includes a guide surface 22 formed on three sides, a top surface 21, and a mating surface. The bottom surface 18 is integrally designed with the bottom 17 of the groove 5 (not shown in the figure). The top surface 21 is triangular. The mating surface is mated to the front side surface 8 of one of the grinding teeth 4. The guide surface 22 intersects with the front side surface 8 of the grinding tooth 4 on the side near the inlet end 2 and intersects with 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 to 3 / 4 of the height 19 of the upper plane 12 of the grinding tooth 4. The transverse grinding teeth 6 and the guide block 20 cause the wood fiber material or similar material and its entrained sand and gravel flow that must rise in the groove 5 to rise in advance before reaching the front side 8 of the grinding teeth 4. This avoids the direct impact of the rising wood fiber material or similar material and its entrained sand and gravel flow on the front side 8 and upper surface 12 of the grinding teeth 4. After being weakened by the transverse grinding teeth 6 and the guide block 20, it enters the gap between the rotor and stator grinding plates 1, thereby further reducing the damage to the grinding teeth 4 near the location of the transverse grinding teeth 6. Due to the obvious obstruction effect of the transverse grinding teeth 6, the wood fiber material or similar material rises too concentratedly when passing in front of the transverse grinding teeth 6. The grinding teeth 4 closest to the transverse grinding teeth 6 are worn the most severely, and the wear gradually decreases towards the material inlet end 2. For this reason, the triangular apex 21 of the guide block 20 is the widest near the transverse grinding teeth 6 and gradually narrows towards the inlet end 2, so that the guide surface 22 and the front side 8 of the grinding teeth 4 form an angle until it is completely integrated into the front side 8. The wider the top surface 21 of the guide block 20, the more significant its impact resistance to the grinding teeth 4, and the less damage the grinding teeth 4 suffers. Conversely, the narrower the top surface 21, the less impact-resistant the guide block 20 becomes, and the damage to the grinding teeth 4 tends to be normal. This solves the problem of less wear on other parts of the grinding teeth 4 but severe wear near the transverse grinding teeth 6, thereby extending the service life of the grinding disc 1. In this embodiment, the longest length of the top surface 21 of the guide block 20 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 guide block 20 is less than or equal to half the height 19 of the upper plane 12 of the grinding teeth 4, gradually decreasing towards the inlet end 2 until it merges into the front side 8 of the grinding teeth 4.

[0048] When the guide block 20 is a cuboid and one of the sub-faces of the guide surface 22 of the guide block 20 is parallel to the front side surface 8 of the grinding tooth 4, a strip-shaped guide block 20 is formed, which is partially or mostly arranged on the front side surface 8 of the grinding tooth 4 along the longitudinal direction of the grinding tooth 4 to protect the grinding tooth 4. The steps formed by this guide block 20 are not just one layer; they can have multiple layers and multiple heights set separately or individually. For example, a three-layer step is formed between the bottom 17 of the groove 5, the sub-surface parallel to the front side 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 sub-surfaces of the guide surface 22 intersecting with the front side 8, and the upper plane 12 of the grinding tooth 4. Therefore, this shape and structure of the guide block 20 changes the traditional flat and smooth design of the front side 8 of the grinding tooth 4 and the groove 5, so that wood fiber materials or similar materials present multiple jumps when rising, which can reduce the impact and wear on the edge 24 between the front side 8 of the grinding tooth 4 and the upper plane 12. Therefore, by providing a greater number of guide blocks 20 on the front side 8 and / or rear side 9 of the grinding teeth 4, it becomes easier and more frequent for wood fiber materials or similar materials to be separated and ground over the upper surface 12 of the grinding teeth 4. This reduces the number of transverse grinding teeth 6 used in combination, or allows the guide blocks to completely replace the transverse grinding teeth 6, resulting in uniform material separation and grinding quality, improved efficiency, sharper grinding teeth 4 with lower energy consumption, and extended service life of the grinding disc 1. Where manufacturing costs are economical, the guide blocks 20 are integrated with the grinding disc 1 during the blank casting process.

[0049] Figure 3 As shown Figure 2The cross-sectional view at position AA of the grinding disc shown specifically illustrates the structure of the guide block 20. Alternating grinding teeth 4 and grooves 5 are provided on the base 1' of the grinding disc 1. A guide block 20 is provided in front of the front side 8 of one of the grinding teeth 4 that is connected to the groove 5. The contact surface of the guide block 20 is combined with the front side 8 of the grinding tooth 4. The guide block 20 also includes a guide surface 22, a top surface 21, and a bottom surface 18. The bottom surface 18 of the guide block 20 is flush with the bottom 17 of the groove 5. Since the height of the top surface 21 is less than the upper plane 12 of the grinding tooth 4, a portion of the front side 8 of the grinding tooth 4 above the top surface 21 is left as a front side 8'. The top surface 21 of the guide block 20 is also higher than the bottom 17 of the groove 5. Therefore, the bottom 17, top surface 21, and part of the front side 8' of the groove 5 form a stepped shape in the groove 5. The height of the top surface 21 of the guide block 20 is 1 / 3 to 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 guide block 20 is 1 / 2 of the height 19 of the upper plane 12 of the grinding tooth 4. The angle α between the guide surface 22 of the guide block 20 away from the front side 8 of the grinding tooth 4 and the upper plane 12 of the grinding tooth 4 is greater than or equal to the angle β between the front side 8 of the grinding tooth 4 and the upper plane 12 of the grinding tooth 4. This figure shows the case where the angle α and the angle β are basically the same and are both approximately right angles, and they are reduced and integrated into the front side 8 of the grinding tooth 4 in the reverse projection direction. Direction line 16 indicates the trajectory of the wood fiber material or similar material in the groove 5 after passing through the guide surface 22, crossing the front side 8 of the grinding tooth 4, and then turning over to the upper surface 12 of the grinding tooth 4. The guide surface 22 guides the wood fiber material or similar material and the sand and gravel it carries to rise in advance through the guide block 20. Therefore, the guide block 20 bears most of the direct impact force that the wood fiber material or similar material and the sand and gravel it carries should have on the grinding tooth 4 here, thereby reducing the damage to the grinding tooth 4 near the transverse grinding tooth 6.

[0050] like Figure 4 As shown, in Example 2, and Figure 3The difference lies in that the guide surface 22 of the guide block 20 and the front side 8 of the grinding tooth 4 are almost on the same plane. That is, at the front side 8 of the grinding tooth 4, the contact surface of the guide block 20 and the front side 8 at that location are designed as an integral part. The guide surface 22 serves as the front side, and the front side 8 at the front and rear positions where the guide surface 22 connects with the front side 8 at that location is on the same plane. That is, the guide block 20 is designed as part of the grinding tooth 4. However, the top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4. This guide block 20 is set on the grinding tooth 4 with bends or protruding grinding teeth 4 with a shape like a "7" serration. The grinding teeth 4 with bends or the grinding teeth 4 shaped like the "7" are the grinding teeth 4 that extend radially from the inlet end 2 to the outlet end 3 along the grinding plate 1. The front side 8 or including the rear side 9 of the grinding teeth 4 changes shape one or more times that is basically transverse to the radial direction of the grinding plate 1. The grinding teeth 4 are not straight as they extend from the inlet end 2 to the outlet end 3, at least not on the front side 8 of the grinding teeth 4. Wood fiber material or similar material flowing in the groove 5 will directly hit the grinding teeth 4 at the bends and rise up in a concentrated manner near the inner inflection point 10. A guide block 20 is provided between the front side 8 of the starting and ending points of each of the bent grinding teeth 4. 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. Therefore, a step-like structure is formed between 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. At any cross-section between the starting and ending points of the bent grinding tooth 4, a [missing information - likely a specific shape or feature] can be obtained. Figure 4 As shown, the guide block 20 is positioned within the front side 8 of the bent grinding teeth 4. A portion of the front side 8' is left above the top surface 21 of the guide block 20. The guide block 20 is positioned particularly before the inner inflection point 10 of the bent grinding teeth 4. This structural arrangement helps maintain the naturalness and smoothness of the groove 5, protecting the angle 24 formed by the portion of the front side 8' of the grinding teeth 4 at the inner inflection point 10 and the upper plane 12, keeping the angle 24 of the grinding teeth 4 sharp and maintaining low energy consumption. Because the top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding teeth 4, wood fiber materials or similar materials in the groove 5 can easily pass over the guide block 20 first and then rise into the gap between the rotor grinding plates and the stator grinding plates 1, increasing the separation and grinding effect and extending their service life.

[0051] As the grinding teeth 4 are continuously worn down to the same height 19 as the top surface 21 of the guide block 20, the top surface 21 of the guide block 20 becomes the upper plane 12 of the new grinding teeth 4, and the guide surface 22 becomes the new front side 8 of the grinding teeth 4. In some areas, the grinding teeth 4 will be widened but will still continue to incorporate wood fiber materials or similar materials for decomposition and grinding. Therefore, the lower part of the grinding teeth 4 with the guide block 20 that has bends or protruding grinding teeth 4 with a shape like a "7" serration is actually a relatively straight grinding tooth 4'. Thus, the upper part of a grinding tooth 4' can be provided with a grinding tooth 4 with bends or protruding grinding teeth 4 with a shape like a "7" serration, etc., to make it into a grinding tooth 4 with at least one layer of different shapes, widths or angles. The guide block 20 can be provided on the front side 8 and / or the rear side 9 of the grinding teeth 4, especially when the mill and the grinding disc 1 can operate in both directions.

[0052] like Figure 5The image shown is a front view of the grinding disc according to Embodiment 1 of the present invention. Due to size and ease of manufacturing, the grinding disc 1 is typically available in both integral and modular forms. The modular form involves dividing the integral disc into several sub-grinding discs of the same shape and size. These sub-grinding discs are arranged together to form the integral disc for use. In this invention, for convenience, the sub-grinding discs are still referred to as grinding disc 1. The grinding disc 1 shown in this figure is one of a set of rotor grinding discs 1 or stator grinding discs 1. The material inlet end 2 is near the inner diameter, and the material outlet end 3 is at the outer edge. The grinding disc 1 is divided into a crushing (refining) zone 31, a coarse grinding zone 33, and a fine grinding zone 34 according to its function. The grinding disc 1 is bolted to the mill body or turntable through the bolt holes 37 on the back. The grinding teeth 4 and the grooves 5 are set at a tangential angle according to the rotation direction 11 of the grinding disc 1, that is, they are tilted at a certain angle in the radial direction of the grinding disc 1 against the rotation direction 11. Transverse grinding teeth 6 are provided in the grooves 5 between the grinding teeth 4 in the coarse grinding zone 33 and the fine grinding zone 34 of the grinding disc 1. On the side of the transverse grinding teeth 6 facing the inlet end 2, the front side 8 of the grinding teeth 4 is along the... A guide block 20 is provided in a section extending from the grinding tooth 4 toward the inlet end 2. That is, a guide block 20 with a triangular top surface 21 is provided between the side of the transverse grinding tooth 6 that crosses the groove 5 and the front side surface 8 of the grinding tooth 4. The top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4 but higher than the bottom 17 of the groove 5. The bottom surface 18 of the guide block 20 is level with the bottom 17 of the groove 5. A step is formed between the bottom 17 of the groove 5, the top surface 21 and the upper plane 12 of the grinding tooth 4. The wood fiber material or similar material and the sand and gravel flow it carries rises in the groove 5 earlier than the front side surface 8 of the grinding tooth 4, which can reduce the impact on the front side surface 8 and the upper plane 12 of the grinding tooth 4. The guide surface 22 of the flow guide block 20, away from the front side 8 of the grinding tooth 4, forms an angle with the front side 8 of the grinding tooth 4. It gradually shrinks from the transverse grinding tooth 6 towards the inlet end 2 until it merges into the front side 8 of the grinding tooth 4. The apex 21 of the triangle has the greatest width in front of the transverse grinding tooth 6 and the front side 8 of the grinding tooth 4, and then gradually decreases in width towards the inlet end 2, thus providing maximum protection for the grinding tooth 4 in front of the transverse grinding tooth 6. The guide surface 22 of the flow guide block 20 gradually shrinks towards the inlet end 2 until it merges into the front side 8 of the grinding tooth 4. At this point, the guide surface 22 can be a plane, a curved surface 22', or composed of several other surfaces, such as being curved in the length direction, or composed of a plane, arc, or inclined plane in the vertical direction. Its main purpose is to maintain smooth material flow and low consumption. Of course, suitable surface variations will allow the flow guide block 20 to better fulfill its function. Since the gap between the grinding teeth 4 in the fine grinding zone 34 of the rotor and stator grinding disc 1 is the smallest and the grinding teeth 4 bear the greatest pressure and are the most severely worn when the grinding disc is working, the guide block 20 is concentrated in the fine grinding zone 34 or in a part of the area between the fine grinding zone 34 and the rough grinding zone 33.

[0053] like Figure 6The image shown is a front view of the grinding disc in Embodiment 2 of the present invention. The grinding disc 1 is one of a group of rotor grinding discs or stator grinding discs. The grinding disc 1 is provided with bent grinding teeth 4. Specifically, the grinding disc 1 is provided with sawtooth-shaped grinding teeth 4 with an overall orientation resembling the number "7". In the prior art, the bending point of the bent grinding teeth 4 extends directly from the upper plane 12 of the grinding teeth 4 to the bottom 17 of the groove 5, forming an inclined guiding surface, and forming an inner inflection point 10 with the radially extending grinding teeth 4. Therefore, the front side of the grinding teeth 4... In areas with a bending tooth structure 4, wood fiber material or similar materials and the sand and gravel they carry concentrate and rise at the inner bend inflection point 10, causing severe wear on the grinding teeth 4 near the inner bend inflection point 10. To overcome the defects of the prior art, the present invention sets a guide block 20 in front of the inner bend point 10 of the bending tooth 4, and tries to keep the groove 5 as natural and smooth as possible, so that the guide surface 22 of the guide block 20 is integrated with the grinding teeth 4 in the lower middle part near the bottom 17 of the groove 5, in each band A guide block 20 is provided between the start and end points of the bent grinding teeth 4. The top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding teeth 4 and higher than the bottom 17 of the groove 5. The bottom 18 of the guide block 20 is level with the bottom 17 of the groove 5. Therefore, a step is formed between the bottom 17, the top surface 21 of the groove 5 and the upper plane 12 of the grinding teeth 4. The height of the top surface 21 of the guide block 20 is 1 / 3 to 3 / 4 of the height 19 of the upper plane 12 of the grinding teeth 4. The greater the bending amplitude and depth of the grinding teeth 4, the better. The deeper the groove, the wider the top surface 21 of the guide block 20 is at this point, thus the better the guiding effect of the guide block 20, thereby protecting the corner 24 formed by the front side 8' of the grinding tooth 4 and the upper plane 12 at the inner bend 10, which is to say, protecting the entire grinding tooth 4. Since the height difference between the top surface 21 of the guide block 20 and the upper plane 12 of the grinding tooth 4 is small, the wood fiber material or similar material in the groove 5 can easily and actively jump to the guide block 20 and the upper plane 12 of the grinding tooth 4. For grinding teeth 4 with a relatively small width, such as those with a width of 2.5 to 6 mm, the guide block 20 increases the strength of the lower part of the grinding teeth 4. The lower part of the grinding teeth 4 below the top surface 21 of the guide block 20 is called the grinding teeth 4'. When the grinding teeth 4 are worn, the height of its upper plane 12 is equal to the top surface 21 of the guide block 20. At this time, the guide block 20 continues to work as part of the grinding teeth 4'. Similarly, it can be understood that the upper part of a grinding tooth 4' can be provided with a bent grinding tooth 4 or a protruding grinding tooth 4 in the shape of a "7" serration, etc., to make it have at least one layer of grinding teeth 4 with a different shape, width or angle than the grinding teeth 4', and the guide block 20 can be provided on the front side 8 and / or the rear side 9 of the grinding teeth 4. For grinding discs with a bidirectional rotation direction 11, the grinding teeth 4 and grooves 5 are basically consistent with the radial direction of the grinding disc 1. The guide block 20 of the grinding teeth 4 of the grinding disc 1 can be provided on both the front side 8 and the rear side 9 of the grinding teeth 4.For a grinding disc with only a unidirectional rotation direction 11, the guide block 20 for the grinding teeth 4 of the grinding disc 1 can also be provided on both the front side 8 and the rear side 9 of the grinding teeth 4. For example, the guide block 20 is provided on the rear side 9 of the grinding teeth 4 in the coarse grinding area 33. The effect of doing so is twofold: first, it increases the strength of the lower part of the grinding teeth 4 in the coarse grinding area 33; second, when the upper surface 12 of the grinding teeth 4 is worn and is level with the top surface 21 of the guide block 20, the guide block 20 continues to work as a widened part of the grinding teeth 4', thereby extending the service life of the grinding disc 1.

[0054] Example 3: Figure 7 As shown, a guide block 20 is provided on the front side 8 of the grinding tooth 4, including a bottom surface 18, a guide surface 22, a contact surface and a top surface 21. 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 is an arc-shaped transition. There is a depression on the top surface 21, that is, the top surface 21 is a downward concave arc-shaped curved surface. Its 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. Since the top surface 21 is a concave curved surface, an arc-shaped concave step is formed between the bottom 17, the top surface 21 and the upper plane 12 of the grinding tooth 4. This diagram shows a guide block 20 with an angle α greater than angle β and an arc-shaped recess on the top surface 21. The direction line 16 is the trajectory of the wood fiber material or similar material in the groove 5 after passing through the guide surface 22 and flipping over from the front side 8 of the grinding tooth 4 to the upper surface 12 of the grinding tooth 4. The turbulence and fluctuations generated when the grinding tooth 4 flips over to the upper surface 12 of the grinding tooth 4, in addition to protecting the grinding tooth 4, also have benefits in the specific environment of separating and grinding wood fiber materials or similar materials. For example, it prolongs the residence time of wood fiber materials or similar materials between the grinding plates, and the formation of rotating vortices is conducive to the separation and removal of cellulose, etc., resulting in better separation and grinding quality.

[0055] Example 4 Figure 8As shown, the grinding disc 1 includes grinding teeth 4 and grooves 5, and a guide block 20 and transverse grinding teeth 6 are arranged in the grooves 5. The guide block 20 is a cuboid, including a top surface 21, a bottom surface 18, a side surface (called the upper side surface) that is close to the transverse grinding teeth 6 and parallel to the transverse side surface of the transverse grinding teeth 6, a side surface 23 (called the lower side surface) that is opposite to the upper side surface and away from the transverse grinding teeth 6, and a side surface (called the parallel side surface) that is located between the upper side surface and the lower side surface and parallel to the front side surface 8 of the grinding teeth 4, and a mating surface. The upper side surface, the parallel side surface, and the lower side surface 23 are collectively referred to as the guide surface 22. The guide block 20 is fitted to the front side 8 of the grinding tooth 4. 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 surface 18 of the guide block 20 is flush with the bottom 17 of the groove 5. A step is formed between 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. The parallel side is parallel to the front side 8 of the grinding tooth 4. The strip-shaped cuboid guide block 20 is set on the front side 8 of the grinding tooth 4 in a longitudinal part or most of the longitudinal part or most of the front side 8 of the grinding tooth 4 to protect the grinding tooth 4. This step-shaped guide block 20 can be more than one layer, and multiple layers and multiple heights can be set separately / individually. This setting changes the traditional flat and smooth design of the front side 8 of the grinding tooth 4 and the groove 5, so that wood fiber materials or similar materials present multiple jumps when rising, which can reduce the direct impact and wear on the edge 24 between the front side 8 of the grinding tooth 4 and the upper plane 12 of the grinding disc 1. By setting a guide block 20 in front of the front side 8 of the grinding tooth 4 and parallel to its side, the grinding tooth 4, which is higher than the top surface 21 of the guide block 20 on the upper surface 12 of the grinding tooth 4, can be delayed in the face of the incoming material. The lower side 23 of the guide block 20, which is set in the direction of the inlet end 2, serves as the end guide surface to guide the wood fiber material or similar material to rise in advance, thereby reducing the damage to the grinding tooth 4 near the transverse grinding tooth 6.

[0056] like Figure 9 , Figure 10 and Figure 11As shown in Examples 5, 6, and 7, during the radial extension of the bent grinding tooth 4 from the inlet end 2 to the outlet end 3 along the grinding disc 1, the front side 8 or including the rear side 9 of the grinding tooth 4 undergoes one or more changes in shape that are substantially transverse to the radial direction of the grinding disc 1. The grinding tooth 4 is not straight during its extension from the inlet end 2 to the outlet end 3. Unlike the cases described in the previous examples where the front side 8 and / or the rear side 9 are planar, the surfaces of the front side 8 and / or the rear side 9 of the grinding tooth 4 here are not planar, but rather concave. The recessed curved surfaces, meaning the front side 8 and / or rear side 9 are not straight, can be rectangular, triangular, or arc-shaped. Correspondingly, guide blocks 20 are provided on the front side 8 and / or rear side 9 of these bent or curved grinding teeth 4. The guide blocks 20 are positioned in these recesses, and their contact surfaces are also curved, fitting against the curved surfaces of the front side 8 and / or rear side 9. The guide surface 22 serves as the front side 8 and / or rear side 9 of the grinding tooth 4 at this location. The guide surface 22 can be a straight plane, such as... Figure 9 As shown; it can also be a combination of a straight plane and a curved surface; such as Figure 10 The guide surface 22 shown is a straight surface, while the guide surface 22' is a curved surface, and the two are connected adjacently; they can also be a combination of curved surfaces with different curvatures, such as... Figure 11 The guide surface 22 shown is a curved surface, and the guide surface 22' is also a curved surface. The two are connected and joined together, but the curvature of the guide surfaces 22 and 22' is different. The guide block 20 is set as a cuboid, triangular prism, cube or arc shape according to the different shapes of the recesses on the front side 8 and / or the rear side 9. Correspondingly, the top surface 21 is a rectangle, triangle, square or a concave arc shape. Therefore, in the grinding disc 1 with bent grinding teeth 4, a guide block 20 is set in front of the inner inflection point 10 between the start and end points of each bent grinding tooth 4, and the groove 5 is made as natural and smooth as possible, so that the guide surface 22 of the guide block 20 is integrated with the lower part of the grinding tooth 4. The top surface 21 of the guide block 20 is lower than the upper plane 12 of the grinding tooth 4, forming a step shape together with the bottom 17 of the groove 5. The guide blocks 20 are arranged one after another or at intervals on the front side 8 and / or rear side 9 of the grinding tooth 4 to form a section of bent grinding tooth 4 with guide blocks 20. The guide block 20 is positioned so that it is embedded in the front side 8 and / or rear side 9 of the grinding tooth 4. That is, on the grinding disc 1, a straight grinding tooth 4' is provided with a bent grinding tooth 4 on its upper part, and it is made to have at least one layer of grinding teeth 4 with different shapes, widths or angles. The guide surface of the guide block 20 provided on the grinding tooth 4 can be a flat guide surface 22, a curved guide surface 22', or a combination of several flat surfaces and curves. This has a very good effect on protecting the front edge 24 of the bent grinding tooth 4, increasing the total length of the grinding tooth 4, and extending the service life of the grinding disc.

[0057] like Figure 12As shown in Embodiment 8, unlike the previous embodiments, the guide block 20 provided on the grinding teeth 4 in this embodiment also includes at least one protruding ridge 35. Due to the presence of the protruding ridge 35, the guide surface 22 of the guide block 20 is a curved surface including at least one protrusion. In the prior art, the excessive arrangement of transverse grinding teeth 6 between the grinding teeth 4 of the grinding disc 1 brings great resistance and significant energy consumption to the mill. In order to reduce or eliminate the transverse grinding teeth 6, while still obtaining the good separation and grinding effect brought by the transverse grinding teeth 6, specifically, the guide block 20 is provided with at least one protruding ridge 35 at the middle or both ends of the guide surface 22. The cross-section of the protruding ridge 35 is rectangular, arc-shaped, or triangular. The protruding ridge 35 extends vertically downward from the top surface 21 of the guide block 20 to the bottom 17 of the groove 5. For example, a guide block 20 with a protruding ridge 35 can be provided on the entire grinding tooth 4 of the grinding disc, wherein the protruding ridge 35 is located in the middle or at the end of the guide surface 22 of the guide block 20; alternatively, the guide block 20 of the previous embodiment and the guide block 20 with a protruding ridge 35 can be alternately provided on the grinding tooth 4, that is, guide blocks 20 without protruding ridge 35 and guide blocks 20 with protruding ridge 35 can be alternately provided on the front side 8 and / or the rear side 9 of the grinding tooth 4, wherein the front side 8 and / or the rear side 9 can be either flat or curved, the distance 39 of the protruding ridge 35 protruding from the guide surface 22 is 1 / 4 to 1 / 2 of the height 19 of the upper surface 12 of the grinding tooth 4 from the bottom 17, and the width 38 of the protruding ridge 35 is equal to or nearly equal to the width of the grinding tooth 4, but less than the width of the groove 5. Preferably, the protruding ridge 35 continues to cross the bottom 17 of the groove 5 and abuts against the rear side 9 of the adjacent grinding tooth 4, forming a protruding ridge 40. As shown in the figure, the protruding ridge 35 is provided at the end of the triangular guide block 20, with several guide blocks 20 without the protruding ridge 35 spaced apart in between. The cross-section of the protruding ridge 35 is semi-circular. A portion of the wood fiber material or similar material flowing rapidly through the groove 5 towards the outlet end 3 reaches the vicinity of the protruding ridge 35. Upon encountering the obstruction of the side 36 of the protruding ridge 35, it is reflected to the opposite side or rises upward, providing an opportunity to enter the guide block 20 and the upper plane 12 of the grinding teeth 4. This arrangement does not require large energy consumption, while maintaining a portion of the throughput in the groove 5, thus maintaining a large production capacity, unlike the existing technology that uses transverse grinding teeth 6, which has a large obstruction. The use of a certain number of guide blocks 20 with protruding ridges 35 makes the separation and grinding effect of the grinding disc 1 on wood fiber materials or similar materials even better.The groove 5 has a stepped bottom 17 and top surface 21, which are connected to the upper surface 12 of the grinding teeth 4. The height of the top surface 21 of the guide block 20 is 1 / 3 to 3 / 4 of the height 19 of the upper surface 12 of the grinding teeth 4. This structure significantly improves the strength, impact resistance, wear resistance, and service life of the straight or bent grinding teeth 4. At the same time, the guide block 20 with the protruding ridge 35 protects the grinding teeth 4. Since the protruding ridge 35 extends from the upper surface 12 of the grinding teeth 4 to the bottom 17 of the groove 5 or continues to cross the bottom 17 of the groove 5 to abut the rear side 9 of the adjacent grinding teeth 4, it can reduce or completely replace the transverse grinding teeth 6 provided in the prior art. This allows wood fiber materials or similar materials to rise more easily and actively enter the top surface 21 of the guide block 20 and the upper surface 12 of the grinding teeth 4, thereby reducing energy consumption while maintaining a large output.

[0058] The present invention also provides a pulping machine, which includes a grinding disc with a guide block or a combination of the guide block and transverse grinding teeth. The pulping machine using such a grinding disc blocks the impact of wood fiber materials or similar materials on the grinding teeth during pulping, reduces damage to the grinding teeth, increases production capacity, extends the service life of the grinding disc, and thus saves production costs.

[0059] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described in this application, through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A flow guide block for use in a refining mill, characterized in that, The grinding disc includes an inlet end, a working surface, and an outlet end. Grinding teeth and grooves are provided on the grinding disc, extending from the inlet end through the working surface towards the outlet end. The grinding teeth and grooves are used for grinding fibrous materials. Each grinding tooth includes a front side, an upper surface, and a rear side. The guide block is located in the groove and is disposed on the front and / or rear sides of one or two grinding teeth forming the groove, for blocking the impact of the fiber material on the grinding teeth at the location. The guide block includes a top surface, a bottom surface, and a guide body, wherein the top surface and the bottom surface are disposed at the top and bottom of the guide body, respectively. The guide fluid includes a guide surface and a contact surface, wherein the contact surface is in contact with the front and / or rear sides of the grinding tooth. The top surface of the guide block is lower than the top surface of the grinding tooth, the bottom surface of the guide block is flush with the bottom of the groove, and the angle between the guide surface and the upper plane of the grinding tooth is greater than or equal to the angle between the front and / or rear sides of the grinding tooth and the upper plane of the grinding tooth.

2. The guide block according to claim 1, characterized in that, The top surface of the guide block is shaped like a rectangle, a triangle, or a curved surface.

3. The flow guide block according to claim 1 or 2, characterized in that, The guide block also includes protruding ridges, and a plurality of the protruding ridges are disposed at any end or between the two ends of the guide block.

4. The flow guide block according to claim 1, characterized in that, The top surface height of the guide block is 1 / 3 to 3 / 4 of the height of the upper plane of the grinding tooth; the maximum width of the top surface is 1 / 4 to 1 / 2 of the height of the upper plane of the grinding tooth.

5. The flow guide block according to claim 3, characterized in that, The maximum width of the protruding ridge is 1 / 4 to 1 / 2 of the height of the upper surface of the grinding tooth.

6. A grinding disc for a pulper, characterized in that, The grinding disc includes the flow guide block as described in any one of claims 1-5.

7. The grinding disc for a pulper according to claim 6, characterized in that, The upper surface, front side, and rear side of the grinding tooth are flat or concave curved surfaces, and the grinding tooth is a straight tooth or a bent tooth.

8. The grinding disc for a pulper according to claim 6, characterized in that, The grinding disc also includes transverse grinding teeth, the two ends of which are respectively connected to the two grinding teeth forming the groove and are adjacent to the guide block.

9. The grinding disc for a pulper according to claim 8, characterized in that, The grinding disc also includes a ramp block disposed in the groove, located on the same side of the transverse grinding teeth as the guide block and adjacent to it.

10. A pulping machine, characterized in that, The refiner includes the grinding discs as described in any one of claims 6-9.

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