Grinding disc of pulping machine for papermaking pulping

Abstract

The utility model relates to the technical field of papermaking pulping, in particular to a pulping machine grinding disc for papermaking pulping, which comprises a connecting grinding disc, a base grinding disc and grinding teeth. An inserting groove is formed in the base millstone, and the grinding teeth are inserted into the inserting groove to be detachably connected with the base millstone; the side faces of the grinding teeth are perpendicular to the base grinding disc. And the matrix millstone is detachably connected with the connecting millstone. The grinding disc is arranged to be in a splicing type, the grinding tooth single bodies of the independent grinding teeth are inserted into the corresponding inserting grooves respectively, then the grinding tooth single bodies are fixedly installed on the bottom face of the base body grinding disc in a spot welding mode, the base body grinding disc and the connecting grinding disc are fixed in a spot welding connection mode, and therefore the whole grinding disc is formed. When part of the grinding tooth single bodies on the grinding tooth are abraded due to long-time use, only the abraded grinding tooth single bodies need to be replaced, the whole grinding disc does not need to be replaced, production cost is reduced, and downtime is shortened.

Description

Technical Field

[0001] This utility model relates to the field of papermaking pulping technology, and in particular to a pulping mill disc for papermaking pulping. Background Technology

[0002] In the papermaking process, fibrous raw materials need to be broken down into fine fibers; this process is called pulping. Current pulping methods generally utilize refiner discs to grind the fibrous raw materials. Specifically, different sizes and tooth shapes of discs are used to grind the fibrous raw materials, breaking them down into fibers. Existing refiner discs consist of a toothed surface and a backing plate. The toothed surface has regularly arranged grinding teeth, which vary depending on the pulping process. The backing plate serves to fix and support the material. In use, the refiner is connected to a refiner, which drives the disc to rotate, repeatedly grinding the fibrous raw materials to achieve the pulping purpose.

[0003] Traditional grinding discs are mostly made of cast steel, and the grinding wheel and grinding teeth are integrally cast. During the manufacturing process, the draft angle prevents the sides of the grinding teeth from being perpendicular to the grinding wheel; that is, an obtuse angle greater than 90° is formed between the sides of the grinding teeth and the grinding wheel (see...). Figure 10 As shown in the diagram, this creates a trapezoidal gap between adjacent grinding teeth, narrowing from top to bottom. Over time, the grinding teeth wear down. Because of this top-to-bottom gap design, the gap becomes increasingly narrower with wear, significantly hindering pulp flow and increasing power consumption while reducing production efficiency. Furthermore, since the grinding teeth and grinding disc are cast as a single piece, replacing the entire grinding disc when the teeth are worn down necessitates replacement, greatly increasing maintenance costs.

[0004] Therefore, there is an urgent need for a grinding disc to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a refining mill disc for papermaking pulping, which solves the technical problem that, due to the tooth gap being a structure that is wider at the top and narrower at the bottom, as the grinding teeth wear down, the tooth gap will become narrower and narrower, which will make the flow of pulp within the tooth gap increasingly obstructed, thereby increasing the power consumption of the refining mill.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] This utility model embodiment provides a refining mill disc for papermaking pulping, including a connecting grinding disc, a base grinding disc, and grinding teeth;

[0008] The base grinding disc has an insertion groove, and the grinding teeth are inserted into the insertion groove and detachably connected to the base grinding disc; the side of the grinding teeth is perpendicular to the base grinding disc; the base grinding disc is detachably connected to the connecting grinding disc.

[0009] Optionally, the insertion slot is a through-hole slot with a rectangular cross-section.

[0010] Optionally, the grinding teeth include multiple grinding teeth units, which are arranged in an array on the base grinding disk, and the spacing between adjacent grinding teeth units is 0.5mm-5mm.

[0011] Optionally, the grinding teeth are forged from cemented carbide, high-chromium cast iron, or stainless steel.

[0012] Optionally, the grinding unit may be in the shape of a straight line, an arc, or an "H" shape, or any one or more of these shapes.

[0013] Optionally, the grinding teeth are connected to the bottom surface of the base grinding disc by spot welding.

[0014] Optionally, the connecting grinding disc and the base grinding disc are connected by spot welding.

[0015] Optionally, the connecting grinding disc and the base grinding disc are flat, arc-shaped, or conical structures.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a refining mill disc for papermaking pulping, which is designed with a spliced ​​structure. This spliced ​​structure includes a connecting grinding disc, a base grinding disc, and grinding teeth. The base grinding disc is provided with an insertion groove, into which the grinding teeth are inserted and detachably connected to the base grinding disc. This structural design of the grinding teeth allows them to be manufactured individually without casting. Furthermore, by engaging with the base grinding disc through an insertion method, the sides of the grinding teeth are ensured to be perpendicular to the base grinding disc, keeping the tooth gap constant. This prevents significant obstruction of the pulp, thereby improving work efficiency and saving at least 5%-20% of electricity. The insertion method also allows for individual disassembly and replacement of the grinding teeth when needed, without replacing the entire grinding disc, greatly reducing the maintenance costs of worn parts. In addition, the detachable connection between the base grinding disc and the connecting grinding disc facilitates the installation and replacement of grinding teeth. At the same time, this structure also ensures that if the base grinding disc is damaged, only the base grinding disc needs to be replaced, or if the connecting grinding disc is damaged, for example, if it cannot be connected to the main body of the grinder, only the connecting grinding disc needs to be replaced.

[0017] Furthermore, the insertion slot is a through-hole slot with a rectangular cross-section. On the one hand, such an insertion slot allows for insertion and removal operations in the vertical direction of the grinding teeth, improving operational flexibility. Especially when horizontal insertion and removal is inconvenient, vertical insertion and removal provides more options for assembly and disassembly, facilitating installation and disassembly. On the other hand, the rectangular through-hole slot ensures that the sidewalls of two adjacent insertion slots are parallel to each other, greatly reducing the probability of interference between the insertion slots. This structure can adapt to structures with densely arranged grinding teeth. For example, it can accommodate tooth pitches of 1mm or even lower.

[0018] Furthermore, the grinding teeth can be forged from materials such as cemented carbide, high-chromium cast iron, or stainless steel. The materials such as cemented carbide, high-chromium cast iron, or stainless steel can ensure the hardness of the grinding, while the forged structure can effectively avoid the existence of draft angle, thereby better achieving the goal of making the side of the grinding teeth perpendicular to the base grinding disc.

[0019] Furthermore, the grinding teeth and the bottom surface of the base grinding disc can be connected by spot welding. The grinding disc and the base grinding disc can also be connected by spot welding. Spot welding is convenient for construction, and the connection can be broken by applying a certain force when needed, making installation and disassembly easier.

[0020] In summary, the grinding disc of this invention includes a connecting grinding disc connected to the main body of the grinding machine. A base grinding disc for mounting grinding teeth is detachably mounted on the connecting grinding disc. The base grinding disc has insertion slots, each corresponding to a grinding tooth. During installation, the grinding teeth are inserted into their corresponding insertion slots, and then spot-welded to the bottom surface of the base grinding disc. The base grinding disc and the connecting grinding disc are then fixed together by spot welding to form a complete grinding disc. When the grinding teeth on the grinding disc wear down due to prolonged use, only the worn grinding teeth need to be replaced, instead of replacing the entire grinding disc, reducing production costs and downtime. Specifically, during replacement, the base grinding disc is removed from the connecting grinding disc, the worn grinding teeth are replaced, and new grinding teeth are reinserted into the insertion slots and spot-welded to the base grinding disc. Finally, the base grinding disc is fixed to the connecting grinding disc. Furthermore, the spliced ​​grinding teeth and base grinding disc can be made of different materials according to different usage requirements, giving full play to the advantages of various materials and improving the overall performance of the grinding disc. Moreover, in this invention, because the grinding teeth and base grinding disc are designed separately, the grinding teeth can be manufactured individually by forging. On the one hand, this avoids the draft angle problem present in traditional casting methods; on the other hand, forging ensures that the grinding teeth maintain good performance after long-term use, better preventing tooth breakage and thus ensuring the grinding effect. Attached Figure Description

[0021] Figure 1This is an exploded structural diagram of a grinding tooth unit of a pulping mill disc for papermaking pulping, which is arranged in a linear distribution.

[0022] Figure 2 This is a three-dimensional structural diagram of a grinding tooth unit of a pulping mill disc for papermaking pulping, which is arranged in a straight line.

[0023] Figure 3 for Figure 2 A schematic diagram of the rear cross-sectional structure;

[0024] Figure 4 This is an exploded structural diagram of an arc-shaped distribution of grinding teeth in a refining mill disc for papermaking pulping according to the present invention.

[0025] Figure 5 This is an exploded structural diagram of a grinding tooth unit of a pulping mill grinding disc for papermaking, which is distributed in an "H" shape.

[0026] Figure 6 yes Figure 5 A detailed magnified structural diagram of the area circled as "A" in the image;

[0027] Figure 7 This is a schematic diagram of the cylindrical split grinding disc structure of the pulping mill grinding disc for papermaking pulping according to the present invention.

[0028] Figure 8 yes Figure 7 A detailed magnified structural diagram of the area circled as "B" in the image;

[0029] Figure 9 This is a schematic diagram of the frustum-shaped split grinding disc structure of the pulping machine grinding disc for papermaking according to the present invention.

[0030] Figure 10 The grinding discs of the pulper used for papermaking pulping mentioned in the background art.

[0031] Explanation of reference numerals in the attached figures

[0032] 1. Connecting grinding disc; 2. Base grinding disc; 21. Bottom surface; 22. Top surface; 23. Insertion groove; 3. Grinding teeth; 4. Threaded through hole; 5. Back plate assembly; 51. Back plate unit; 100. Grinding disc for grinding mill. Detailed Implementation

[0033] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See Figures 1 to 9As shown in the embodiment of this utility model, a pulping mill integral grinding disc for papermaking includes at least one pulping mill grinding disc 100 for papermaking pulping. Each pulping mill grinding disc 100 has a back plate assembly 5 on the side away from the grinding teeth 3, and each pulping mill grinding disc 100 is connected to the pulping mill body through a connecting assembly. The back plate assembly 5 includes multiple back plate units 51, which are laid flat on the pulping mill grinding disc 100 and fixedly connected to the pulping mill grinding disc 100.

[0035] In this embodiment, the grinding discs of the spliced ​​toothed monomers are installed in the pulping equipment, and the grinding discs are driven to rotate by the main body of the pulper (driven by a motor or other drive device). When the pulp passes through the grinding disc 100 of the pulper, the grinding discs on the grinding disc 100 exert shearing, squeezing, and kneading effects on the pulp fibers. The sharp edges of the grinding discs can effectively cut long fibers, shortening their length. At the same time, the squeezing and kneading actions cause the fibers to filament, increasing the specific surface area of ​​the fibers and improving the bonding force between the fibers, thereby improving the performance of the pulp and meeting the requirements of different paper production.

[0036] It should also be noted that these grinding discs are widely used in the production processes of various types of paper, such as newsprint, writing paper, and packaging paper. Different types of grinding discs can be selected according to the characteristics of the paper and the requirements of the production process to achieve the best pulping effect. Other applications: They also have some use in industries that require the processing of fibrous materials, such as fiberboard production and biomass energy processing. By adjusting the shape and parameters of the grinding disc teeth, they can adapt to the processing requirements of different fibrous materials.

[0037] Furthermore, the connecting assembly includes locking bolts, and threaded through holes 4 are provided on both the connecting grinding disc 1 and the base grinding disc 2 of the refiner grinding disc 100. The threaded through holes 4 are used to insert the locking bolts. This facilitates the installation and disassembly of the entire refiner grinding disc 100, thereby improving overall maintenance efficiency.

[0038] One type of refining mill disc for papermaking pulping includes a connecting grinding disc 1, a base grinding disc 2, and grinding teeth 3. The base grinding disc 2 has an insertion groove 23, into which the grinding teeth 3 are inserted and detachably connected to the base grinding disc 2; the side surface of the grinding teeth 3 is perpendicular to the base grinding disc 2. It should also be noted that when the base grinding disc 2 has a flat plate structure, the side surface of the grinding teeth 3 is perpendicular to the top surface of the plane containing the base grinding disc 2. When the base grinding disc 2 has an arc-shaped structure, the side surface of the grinding teeth 3 is perpendicular to the tangential surface of the arc apex of the base grinding disc 2. The base grinding disc 2 is detachably connected to the connecting grinding disc 1. The base grinding disc 2 has a bottom surface 21 connected to the connecting grinding disc 1 and a top surface 22 corresponding to the bottom surface 21. An insertion groove 23 corresponding to the grinding teeth 3 is provided on the top surface 22, and the insertion groove 23 extends through the bottom surface 21. The grinding teeth 3 are inserted into the insertion groove 23 and fixedly installed on the bottom surface 21 of the base grinding disc 2.

[0039] In this embodiment, the base grinding disc 2 is generally made of a high-strength metal material, such as high-quality carbon steel or alloy steel. The function of the base grinding disc 2 is to provide support for the grinding teeth, enabling them to work stably during the pulping process, and also to transmit power. It should also be noted that the base grinding disc 2 in this embodiment has multiple insertion slots 23 to accommodate multiple grinding teeth. These slots are spaced closely together and the material of the base grinding disc 2 can fully support the material. Furthermore, the insertion slots 23 are CNC machined, meaning that precise grooving can be achieved during punching or cutting, ensuring the accuracy and position of the grooves.

[0040] In this embodiment, the grinding disc is designed as a splice type, and includes a connecting grinding disc 1 connected to the main body of the grinder. A base grinding disc 2 for mounting grinding teeth 3 is detachably mounted on the connecting grinding disc 1. Insertion slots 23 are provided on the base grinding disc 2, and each insertion slot 23 corresponds one-to-one with a single grinding tooth. The grinding teeth are inserted into their corresponding insertion slots 23, and then spot-welded to the bottom surface 21 of the base grinding disc 2. Finally, the base grinding disc 2 and the connecting grinding disc 1 are fixed together by spot welding, thus forming a complete grinding disc. When some grinding teeth on the grinding teeth 3 wear down after prolonged use, only the worn grinding teeth need to be replaced, instead of replacing the entire grinding disc, reducing production costs and downtime. Specifically, during replacement, the base grinding disc 2 is removed from the connecting grinding disc 1, and the worn grinding tooth unit is replaced. A brand new grinding tooth unit is then reinserted into the insertion slot 23, and spot-welded to both the base grinding disc 2 and the connecting grinding disc 1 to form a complete grinding disc for the pulper. Furthermore, the spliced ​​grinding tooth unit and base grinding disc 2 can be made of different materials according to different usage requirements, fully utilizing the advantages of various materials to improve the overall performance of the grinding disc. The splicing process ensures the installation accuracy and positional precision of the grinding tooth unit, making the grinding disc more stable during operation and resulting in a more uniform pulping effect. In this embodiment, it is ensured that the grinding tooth units of the pulper grinding disc 100 are always free from wear, while facilitating replacement and installation, greatly reducing maintenance efficiency and costs.

[0041] It should also be noted that in this embodiment, the grinding disc is connected to the base grinding disc 2 via a splicing process. The individual grinding teeth of the grinding disc 100 are typically made of high-performance wear-resistant materials. These materials possess extremely high hardness and wear resistance, maintaining the integrity and sharpness of the tooth shape during prolonged grinding processes, thus reducing the decline in grinding efficiency due to wear. The grinding teeth of the spliced ​​grinding disc are typically made of materials with excellent wear and corrosion resistance. This means that the grinding disc can maintain good working condition for a longer period, reducing equipment downtime and energy consumption caused by frequent replacements due to severe grinding disc wear. Simultaneously, the installation and commissioning of new grinding discs also consumes a certain amount of energy, and the long service life of the spliced ​​grinding disc reduces this energy consumption.

[0042] The grinding discs of splicing teeth have the following advantages in pulp lifting:

[0043] 1. High-efficiency cutting: The spliced ​​tooth design allows the blades to cut pulp fibers efficiently, much like a knife. During the rotation of the grinding disc, the contact area between the disc and the fiber is relatively small, generating greater pressure that more easily cuts long fibers, resulting in a more uniform length distribution. This facilitates further processing of the pulp, improving paper uniformity and strength.

[0044] 2. Precise Filament Splitting: The splicing tooth structure facilitates precise fiber splitting during the pulping process. When the fiber comes into contact with the grinding teeth, it experiences concentrated force at the tooth edges, causing the fiber to tear and split, forming more fine fibers and fiber bundles. This filament effect increases the specific surface area of ​​the fiber, improves the bonding force between fibers, and thus enhances the physical properties of the paper.

[0045] 3. Stable pulping quality: The shape and size of the splicing teeth are relatively stable, which can provide a relatively consistent force during the pulping process, thus ensuring the stability of pulp quality.

[0046] Compared to integrally cast grinding discs, the grinding disc 100 of a grinding mill with spliced ​​grinding teeth only requires replacement of the worn teeth after the individual grinding teeth wear down, rather than replacing the entire grinding disc, which greatly improves the service life of the grinding disc and reduces production costs.

[0047] 4. Tooth Breakage: Traditional one-piece cast grinding discs are prone to tooth breakage in harsh working conditions due to the inability to control various casting defects. Specifically, during pulping with traditional grinding discs, if the pulp is not clean and contains foreign matter, it will affect the cast grinding teeth, even causing them to break. Once a grinding disc breaks, not only will the entire disc be scrapped, but the broken teeth will also mix into the pulp, making subsequent work difficult. In this case, paper mill workers need to immediately stop the machine for maintenance, including but not limited to cleaning the pulp delivery pipes and disassembling valves. Because pulp is expensive, to avoid wasting pulp, workers must manually sift out the broken teeth, which is time-consuming, labor-intensive, and affects the paper mill's grinding progress—a problem paper mills dread. In contrast, this embodiment uses a forging process to produce grinding teeth, effectively solving the problem of tooth breakage in traditional grinding discs.

[0048] In this embodiment, since the grinding teeth are spliced ​​onto the base grinding disc 2, when the grinding teeth are worn, chipped, or otherwise damaged, the damaged teeth can be easily removed and new grinding teeth can be spliced ​​on. This repairability allows the grinding disc to recover its performance in a timely manner during use, reducing equipment downtime and improving production efficiency. Furthermore, the repair process is relatively simple, requiring no complex equipment or processes; it can be completed in a general maintenance workshop, reducing maintenance costs and difficulty. It should also be noted that the splicing teeth of the refiner grinding disc 100 can be designed in various ways according to different pulping processes and pulp characteristics. For example, for different fiber raw materials and paper types, teeth with different shapes, pitches, and angles can be designed to achieve the best pulping effect. Different types of teeth can be combined on the same grinding disc to form a composite tooth structure, meeting the needs of various pulping functions. For example, coarse teeth are used in the central area of ​​the grinding disc for initial fiber cutting, while fine teeth are used in the edge area for further fiber refinement and buffing, thereby improving the quality and performance of the pulp. Furthermore, the tooth shape design of the refining disc 100 allows for more effective action on the fibers, resulting in lower motor energy consumption compared to traditional discs while achieving the same pulping effect. This is because its optimized tooth shape facilitates smoother fiber flow between the discs, reducing unnecessary friction and resistance, thereby lowering energy consumption during the pulping process. The long service life of the refining disc 100 also reduces equipment downtime and restarts due to frequent disc replacements, indirectly lowering energy consumption as well.

[0049] In this embodiment, the individual grinding teeth of the refiner grinding disc 100 can be customized according to different pulping equipment and process requirements. Whether it is a high-speed pulping equipment in a large paper mill or a low-speed pulping equipment in a small paper mill, it can be adapted to different production conditions by adjusting parameters such as the size, tooth shape and material of the grinding disc.

[0050] For different types of pulp, such as wood pulp, straw pulp, and waste paper pulp, spliced ​​toothed grinding discs can achieve good pulping results and improve pulp quality and stability through reasonable tooth shape design and material selection.

[0051] Furthermore, the insertion slot 23 is a through-hole slot with a rectangular cross-section, allowing for insertion and removal from both the top and bottom. Specifically, when replacing the grinding teeth 3, the grinding teeth 3 can be pulled out directly from the top or knocked downwards from the top, causing them to slide out quickly from the bottom, both facilitating replacement and reducing the time required to replace the grinding teeth 3. The through-hole slot is a groove that completely penetrates from the top surface 22 to the bottom surface 21 of the base grinding disc 2. The purpose of providing the through-hole slot is to allow for disassembly and installation in both the top and bottom directions.

[0052] Furthermore, the grinding teeth 3 include multiple grinding tooth units, and the base grinding disk 2 has multiple insertion slots 23. Adjacent grinding tooth units are spaced apart on the base grinding disk 2, and the spacing between adjacent grinding tooth units is 0.5mm-5mm. Preferably, the spacing can be 0.5mm, 0.6mm, 0.8mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 3.6mm, 3.8mm, 4.2mm, 4.5mm, and 5.0mm. Of course, the spacing between adjacent grinding tooth units can also be adaptively set to 10mm, 15mm, and 20mm according to requirements. The insertion slot 23 is a through-hole slot with a rectangular cross-section. On the one hand, this insertion slot 23 allows for vertical insertion and removal of the grinding teeth 3, improving operational flexibility. Especially when horizontal insertion and removal is inconvenient, vertical insertion and removal provides more options for assembly and disassembly, facilitating installation and disassembly. On the other hand, the rectangular through-hole slot ensures that the sidewalls of two adjacent insertion slots 23 are parallel to each other, greatly reducing the probability of interference between the insertion slots 23. This structure can adapt to a densely arranged structure of grinding teeth 3. For example, it can accommodate tooth spacing of 1mm or even lower. It should also be noted that the spacing of the insertion slots 23 is designed in conjunction with the grinding teeth unit. This spacing ensures the distribution density of the grinding teeth unit, further improving the grinding effect and grinding accuracy. Specifically, the grinding teeth unit is a strip-shaped structural component, i.e., a tooth rack, but it can also be a plate-shaped structural component, i.e., a tooth plate.

[0053] In this embodiment, the spliced ​​structure includes a connecting grinding disc 1, a base grinding disc 2, and grinding teeth 3. The base grinding disc 2 is provided with an insertion groove 23, into which the grinding teeth 3 are inserted and detachably connected to the base grinding disc 2. This structural design of the grinding teeth 3 allows them to be manufactured separately without casting. By interlocking with the base grinding disc 2, the side of the grinding teeth 3 is ensured to be perpendicular to the base grinding disc 2, keeping the tooth gap constant. This prevents significant obstruction of the pulp, improving work efficiency while saving at least 5%-20% of electricity. Furthermore, the interlocking connection allows for individual replacement of the grinding teeth 3 when needed, eliminating the need to replace the entire grinding disc, significantly reducing maintenance costs for worn parts. In addition, the base grinding disc 2 and the connecting grinding disc 1 are detachably connected. This structure facilitates the installation and replacement of the grinding teeth 3. At the same time, this structure also ensures that if the base grinding disc 2 is damaged, only the base grinding disc 2 needs to be replaced. Or if the connecting grinding disc 1 is damaged, for example, if it cannot be connected to the main body of the grinder, only the connecting grinding disc 1 needs to be replaced.

[0054] Furthermore, the cross-section of the grinding unit is rectangular. In this embodiment, the grinding unit is forged separately, which allows it to form a rectangle, ensuring that it maintains good performance even after prolonged use, thus guaranteeing the grinding effect. It should also be noted that the grinding unit is typically made of wear-resistant and corrosion-resistant alloy materials, such as high-nickel-chromium alloys. These materials can withstand the high shear and frictional forces during the pulping process, ensuring that the grinding unit maintains good performance even after prolonged use. The shape and size of the grinding unit can be designed according to different pulping requirements. The grinding teeth can be forged from materials such as cemented carbide, high-chromium cast iron, or stainless steel. The materials ensure the hardness of the grinding, while the forged structure effectively avoids draft angles, thus better achieving the goal of perpendicularity between the side of the grinding teeth and the base grinding disc.

[0055] In this embodiment, the tooth shape of the individual grinding teeth of the refiner disc 100 is precisely designed and can be customized according to fiber characteristics, enabling efficient fiber cutting and fiber separation with less energy consumption during the pulping process. Its sharp and rationally shaped teeth can accurately act on the fibers, allowing them to be processed optimally during shearing and abrasion, avoiding over- or under-pulping and reducing energy waste. High-quality spliced ​​toothed discs can minimize fiber damage while ensuring pulping effect. Because of the material and splicing process of the teeth, the disc has good stability and wear resistance during operation, preventing excessive fiber cutting or excessive debris generation due to tooth wear, thus reducing the extra energy consumed to compensate for fiber damage. The carefully designed tooth shape of the individual grinding teeth of the refiner disc 100 allows for smoother pulp flow between the discs. For example, some tooth profiles employ special curves or angles to guide the pulp along specific paths, preventing pulp turbulence and blockage between the grinding discs, reducing resistance during equipment operation, and consequently reducing the energy consumed by the motor to overcome resistance. The individual grinding teeth of the refiner grinding disc 100 are connected to the base grinding disc 2 through a precise splicing process, ensuring the installation accuracy and positional precision of the individual grinding teeth. This makes the grinding disc more balanced during rotation, reducing vibration and additional resistance caused by disc imbalance, and lowering the equipment's energy consumption.

[0056] It should also be noted that the rectangular right-angled design of the grinding blades allows for efficient cutting of pulp fibers, much like a knife blade. During the rotation of the grinding disc, the relatively small contact area between the right-angled teeth and the fibers generates greater pressure, making it easier to cut long fibers and resulting in a more uniform length distribution. This facilitates further processing of the pulp, improving paper properties such as uniformity and strength. The right-angled structure also facilitates precise fiber fracturing during the beating process. When fibers come into contact with the right-angled teeth, they experience concentrated forces at the edges, causing the fibers to tear and fracture, forming more fine fibers and fiber bundles. This fracturing effect increases the specific surface area of ​​the fibers, improves the bonding force between fibers, and thus enhances the physical properties of the paper, such as tensile strength and bursting strength.

[0057] Furthermore, the right-angled teeth of the refiner disc 100 can more powerfully propel the pulp flow during rotation, creating a stronger stirring and mixing effect. This helps to distribute the fibers in the pulp more evenly in the suspension, avoiding fiber agglomeration and sedimentation, and improving the overall quality and stability of the pulp. Simultaneously, the good stirring and mixing effect also promotes full contact between chemicals and fibers, improving the efficiency of chemical treatment and reducing the amount of chemicals used. The right-angled teeth more powerfully propel the pulp flow, creating a stronger stirring and mixing effect, resulting in a more even distribution of fibers in the suspension, avoiding agglomeration and sedimentation. While some narrow-groove discs have advantages in retaining long fibers, they are not as uniform in pulp stirring and mixing as right-angled discs, which may lead to uneven fiber distribution in certain areas of the pulp, affecting paper quality. In addition, the relatively stable shape and size of the right-angled teeth provide a more consistent force during the pulping process, thus ensuring the stability of the pulp quality. Compared to other tooth shapes, right-angled teeth are less prone to rapid shape changes due to wear, maintaining good beating results for a longer period of time. This reduces fluctuations in pulp quality caused by wear of the grinding discs, which is conducive to achieving a stable production process and high-quality paper products.

[0058] Furthermore, the individual grinding teeth can be linear, arc-shaped, or "H"-shaped, or a combination thereof. That is, a single base grinding disc 2 can also have a combination of multiple grinding teeth with different tooth shapes. In this embodiment, the refiner grinding disc 100 can be customized according to different pulping equipment, production scale, and pulp type. By adjusting parameters such as the size, tooth shape, and tooth pitch of the grinding disc, it can be perfectly matched to specific production needs. In this way, the grinding disc can operate in optimal working condition during production, avoiding energy waste caused by mismatch between the grinding disc and the equipment or production process, thus achieving the goal of energy saving and consumption reduction.

[0059] Furthermore, the grinding teeth 3 are connected to the bottom surface 21 of the base grinding disc 2 by spot welding. Spot welding ensures the stability of the individual grinding teeth in the grinding teeth 3 during use.

[0060] Furthermore, the connecting grinding disc 1 and the base grinding disc 2 are connected by spot welding. Spot welding is convenient for construction, and the connection can be easily broken by applying a certain force when needed, making installation and disassembly easier.

[0061] Furthermore, grinding discs are mainly divided into integral grinding discs and split grinding discs. The difference between split grinding discs and integral grinding discs is that split grinding discs are made by assembling individual grinding disc units into a whole, and their usage is no different from integral grinding discs. Specifically, the connecting grinding disc 1 and the base grinding disc 2 have a flat, arc-shaped, or conical structure. When the connecting grinding disc 1 and the base grinding disc 2 have a flat structure, it can form a disc-shaped split grinding disc composed of multiple grinding discs 100 spliced ​​together, or it can be a single integral ring-shaped grinding disc; the splicing of individual grinding disc units specifically forms... Figure 7 and Figure 8 As shown, the split grinding disc is cylindrical or frustum-shaped, with the connecting grinding disc 1 and the base grinding disc 2 having an arc-shaped structure. Compared to a single grinding disc, split grinding discs facilitate the repair of damaged areas of the grinding teeth, thus reducing costs.

[0062] A manufacturing process for a refining mill disc used in papermaking pulping, the process comprising:

[0063] S1. Punch or cut holes in the base grinding disc 2 to form insertion grooves 23. Specifically, the cutting method can be laser cutting, wire cutting, water jet cutting, or CNC machine tools.

[0064] S2. The grinding teeth 3, which are prepared by forging, are inserted into the insertion groove 23, so that the grinding teeth 3 and the base grinding disk 2 form a detachable connection structure, and at the same time, the side of the grinding teeth 3 is perpendicular to the base grinding disk 2.

[0065] S3. The base grinding disc 2 in S2 is detachably connected to the connecting grinding disc 1 to form a pulping disc for papermaking pulping.

[0066] This utility model also provides a manufacturing process for a refiner disc used in papermaking pulping. The process includes: S1, punching holes in a base grinding disc 2 to form insertion grooves 23; S2, inserting grinding teeth 3, prepared by forging, into the insertion grooves 23, so that the grinding teeth and the base grinding disc 2 form a detachable connection structure, while ensuring that the side of the grinding teeth 3 is perpendicular to the base grinding disc 2; S3, detachably connecting the base grinding disc 2 with the grinding teeth 3 to the connecting grinding disc 1 to form a refiner disc 100 for papermaking pulping. This process completely abandons the original one-piece casting process, breaking free from the inherent thinking patterns of those skilled in the art. Through a combination of assembly and forging, it fundamentally changes the existing technology in terms of both overall structure and manufacturing process, thereby thoroughly solving the technical problems existing in current components that those skilled in the art have long desired to solve but have consistently failed to achieve.

[0067] In this embodiment, the energy-saving and consumption-reducing advantages of spliced ​​gear grinding discs are mainly reflected in the following aspects:

[0068] 1. High-efficiency fiber treatment: The structural design of the spliced-tooth grinding discs enables more precise and efficient cutting and fiber separation of pulp fibers. During the pulping process, this efficient fiber treatment method allows the fibers to reach the required degree of freeness in a shorter time. Compared with traditional grinding discs, it reduces the ineffective time of the grinding discs on the fibers, thereby reducing energy consumption. Pulping equipment using the new spliced-tooth grinding discs consumes 10%-15% less energy than equipment using ordinary grinding discs while achieving the same degree of freeness.

[0069] 2. Optimized Pulp Flow: The structure of the spliced ​​toothed grinding discs helps optimize the flow of pulp between the discs, reducing turbulence and clogging. This reduces the resistance during equipment operation, and correspondingly lowers the energy consumption required for the motor to drive the grinding discs. Based on fluid mechanics principles and empirical data from actual production, this method can reduce the overall energy consumption of the equipment by approximately 5%-10%.

[0070] 3. Production scale and continuity: In large-scale continuous production, the energy-saving advantages of spliced ​​gear grinding discs will be more obvious, because their stable performance can reduce the number of equipment start-ups and shutdowns and adjustment time, and reduce the additional energy consumption caused by replacing grinding discs.

[0071] In summary, spliced ​​gear grinding discs can reduce energy consumption by about 15%-25% under ideal conditions. However, in practical applications, due to the combined influence of various factors, the energy consumption reduction may be between 5% and 20%.

[0072] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0074] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A refiner plate for papermaking refining, characterized by: The connecting millstone (1), the base millstone (2) and the mill tooth (3) are included. The base millstone (2) is provided with a plug-in slot (23), and the mill tooth (3) is inserted into the plug-in slot (23) to be detachably connected with the base millstone (2); the side surface of the mill tooth (3) is perpendicular to the base millstone (2); and the base millstone (2) is detachably connected with the connecting millstone (1).

2. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The plug-in slot (23) is a through-hole slot with a rectangular cross section.

3. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The mill tooth (3) includes a plurality of mill tooth monomers, and the plurality of mill tooth monomers are arranged in an array on the base millstone (2) with a spacing of 0.5-5 mm between adjacent mill tooth monomers.

4. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The mill tooth (3) is made of hard alloy, high-chromium cast iron or stainless steel.

5. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The mill tooth monomer is in any one or more of a straight line shape, an arc shape or an "H" shape.

6. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The mill tooth (3) is connected with the bottom surface of the base millstone (2) by spot welding.

7. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized in that: The connecting millstone (1) and the base millstone (2) are connected by spot welding.

8. A refiner plate for papermaking refiner pulping as claimed in claim 1, characterized by: The connecting millstone (1) and the base millstone (2) are in a flat plate structure, an arc structure or a conical structure.

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