A pulp mill

Abstract

The present application relates to the technical field of a pulp mill, in particular to a pulp mill for paper pulp manufacturing, which comprises a machine base, a shaft power assembly and an outer shell, the outer shell can be split, the outer shell and the shaft power assembly are installed on the upper side of the machine base, one end of the shaft power assembly is installed in the inner side of the outer shell, the shaft power assembly can be power rotated relative to the outer shell and the machine base, two stator disc assemblies are installed in the inner side of the outer shell, the stator disc assemblies are coaxially arranged with the shaft power assembly, and a rotating disc assembly is arranged between the two stator disc assemblies. The pulp after being ground can pass through a second mixing treatment mechanism, the second mixing treatment mechanism can again mix and treat the material entering the stator disc assembly and the rotating disc assembly for grinding, so that the paper pulp is prevented from being separated again due to the grinding resistance, the paper pulp after secondary mixing is again subjected to grinding treatment, the mixing degree of the pulp is ensured, and the subsequent pulp is stably flowed between the stator disc assembly and the rotating disc assembly after being pumped.

Description

Technical Field

[0001] This invention relates to the technical field of pulpers, and more particularly to a pulper for papermaking. Background Technology

[0002] In papermaking, after the pulp has been cooked, screened, and bleached, it needs to be refined using a refiner. The refined pulp has higher elasticity and plasticity so that the produced paper can meet the expected quality indicators. Therefore, the refiner is an indispensable piece of equipment in papermaking.

[0003] Chinese patent CN116427201A discloses a dual-disc refiner, in which the first and second discs are provided with a grinding pattern assembly with the same structure. The first disc includes a disc body, and the grinding pattern assembly includes multiple sets of grinding patterns of different lengths arranged in a ring array on the disc body. The length direction of the grinding pattern is not collinear with the radial direction of the disc body. Multiple damping columns are arranged along the length direction of the grinding pattern. The spacing of the damping columns on any of the grinding patterns decreases linearly or nonlinearly along the direction away from the axis of the disc body. This invention replaces the traditional concave bag with damping columns. When the density of the damping columns is high, it can extend the grinding time of the pulp and increase the internal energy received by the pulp during the receiving and grinding process, thereby achieving the effect of raising the temperature to inactivate and sterilize. The above-mentioned related technologies have the following defects: After the pulp is added into the equipment through the feed pipe, it directly enters the grinding discs. However, the pulp is composed of a mixture of fiber materials and water. During long-distance transportation, due to the difference in flow rate between different materials, the materials in the pulp will separate from the water. Directly feeding it into the grinding discs will result in poor flow effect, which is not conducive to pulping. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a pulp refiner for pulp manufacturing.

[0005] The present invention provides a pulp refiner for pulp manufacturing, which adopts the following technical solution: it includes a machine base, a shaft power assembly, and a housing. The housing is detachable. The housing and the shaft power assembly are mounted on the upper side of the machine base. One end of the shaft power assembly is mounted on the inner side of the housing. The shaft power assembly is capable of rotating relative to the housing and the machine base. Two fixed plate assemblies are installed on the inner side of the housing. The fixed plate assemblies are coaxially arranged with the shaft power assembly. A turntable assembly is arranged between the two fixed plate assemblies. The turntable assembly is coaxially installed with the shaft power assembly and rotates relative to the fixed plate assemblies and the housing.

[0006] The upper end of the outer shell is equipped with a feed pipe and a discharge pipe, and the slurry is treated between the rotating disc assembly and the stationary disc assembly.

[0007] A pretreatment chamber is provided inside the outer shell, and the feed pipe is connected to the pretreatment chamber. A first mixing mechanism is provided inside the pretreatment chamber. The first mixing mechanism is coaxially connected to the shaft power assembly. After the slurry is premixed by the first mixing mechanism, it enters the space between the fixed plate assembly from the inner ring side of the turntable assembly.

[0008] The turntable assembly is equipped with a second mixing mechanism. The two ends of the second mixing mechanism respectively mix the slurry between the two fixed plate assemblies near the turntable assembly. The second mixing mechanism is installed inside the outer shell.

[0009] Optionally, the first mixing processing mechanism includes a concentric cylinder and a feeding disc. The concentric cylinder is located between the feeding disc and the fixed disc assembly. The feeding disc is concentrically mounted on the outside of the shaft power assembly. One end of the concentric cylinder is coaxially fixed with the end face of the feeding disc. The end face of the feeding disc connected to the concentric cylinder and located on the outer ring side of the concentric cylinder has a feeding ring groove. The end face of the feeding disc connected to the concentric cylinder and located on the inner ring side of the concentric cylinder has a discharge hole.

[0010] An outer mixing frame passes through the end face of the feeding disc, located on the inner ring side of the concentric cylinder and close to the concentric cylinder. The outer mixing frame can rotate relative to the feeding disc. An inner mixing frame that can rotate relative to the outer mixing frame is installed on the axial side of the outer mixing frame. A gear and ring meshing assembly is installed on the inner side of the outer shell. When the feeding disc follows the shaft power assembly to rotate, the inner mixing frame and the outer mixing frame rotate around their own axes under the gear and ring meshing assembly.

[0011] Optionally, the outer mixing frame is composed of a closed end tube and multiple rods with uniform circumferential spacing. The inner mixing frame includes an inner shaft and multiple stirring rods. The stirring rods are arranged perpendicular to the inner shaft. The inner shaft is coaxially rotatably inserted into the inner side of the end tube of the outer mixing frame. The multiple stirring rods are spirally distributed.

[0012] Optionally, the gear ring meshing assembly includes a full gear ring and multiple arc-shaped gear ring holders. The full gear ring is installed inside the housing and is coaxially arranged with the shaft power assembly.

[0013] The main gear is coaxially mounted on the end tube of the outer mixing frame, and the main gear meshes with the inner ring surface of the full gear ring.

[0014] The inner shaft is equipped with a secondary gear on the inner side of each arc-shaped gear ring frame. The inner ring surface of the arc-shaped gear ring frame is composed of multiple arc-shaped tooth plates. The multiple arc-shaped tooth plate structures on the inner side of the multiple arc-shaped gear ring frames are staggered along the circumferential direction of the feed plate axis. The multiple secondary gears connected to the same inner shaft have different radii, and the radii of the secondary gears are different from those of the main gear.

[0015] Optionally, multiple guide plates are fixed on the outer ring surface of the concentric cylinder, and the outer shell located on the outer ring side of the concentric cylinder has a conical cylindrical structure, with the end of the outer shell near the feed plate being the smaller diameter end.

[0016] The guide plate is spirally bent, and multiple circumferentially arranged material-pulling plates are installed on the inner circumferential surface of the outer shell. The guide plate has a matching groove structure at the position of the material-pulling plates.

[0017] Optionally, the turntable assembly includes a grinding disc and a linkage ring. The inner ring surface of the linkage ring is rotatably connected to the outer ring surface of the grinding disc. The linkage ring is inserted into the inside of the outer casing and moves along the axial direction inside the outer casing. The inner ring surface of the grinding disc is coaxially mounted with the shaft power assembly. The grinding disc can slide on the surface of the shaft power assembly while rotating synchronously with the shaft power assembly.

[0018] The left and right sides of the rotating grinding disc and the two fixed disc assemblies are each provided with a combined cavity. The two combined cavities located on the same side of the rotating grinding disc form an annular cavity. The two ends of the second mixing processing mechanism are located in the annular cavities on both sides of the rotating grinding disc.

[0019] The left and right sides of the rotating grinding disc and the two fixed disc components are each provided with multiple guide grooves. The multiple guide grooves are arranged in two groups and are located on the inner and outer ring sides of the corresponding combined cavity.

[0020] Optionally, the second mixing processing mechanism includes a driven gear and a shaft. The driven gear is located inside the rotating grinding disc and is coaxially connected to the shaft. Both ends of the shaft penetrate the inner wall of the rotating grinding disc and rotate relative to the rotating grinding disc. Both ends of the shaft that extend out of the rotating grinding disc are equipped with stirring blades.

[0021] A concentric toothed ring is fixed on the inner ring surface of the linkage ring. The driven gear meshes with the inner ring surface of the concentric toothed ring, and the concentric toothed ring rotates inside the grinding disc.

[0022] Optionally, the outer casing consists of a fixed outer casing and a movable outer casing. The fixed outer casing is fixed to the machine base, and the movable outer casing is detachably connected to the fixed outer casing by bolts.

[0023] An axial displacement mechanism capable of being powered is installed on the axial side of the movable outer shell away from the fixed outer shell. The fixed plate assembly on the side of the rotating grinding disc away from the shaft power assembly is coaxially connected to the axial displacement mechanism. The axial displacement mechanism drives the fixed plate assembly to move along the axis of the shaft power assembly.

[0024] Optionally, the guide channel is bent in an Ω shape, and multiple discharge holes are provided on the end face of the grinding disc.

[0025] Optionally, the linkage ring end face has multiple distance limiting mechanisms passing through it. The two ends of the distance limiting mechanism are connected to two fixed plate components. One end of the distance limiting mechanism passes through the movable shell. The distance limiting mechanism can rotate relative to the movable shell. A power mechanism for controlling the twisting of the distance limiting mechanism is installed on the outside of the movable shell.

[0026] The distance limiting mechanism includes a parallel groove shaft and two thickness gradient disks. The parallel groove shaft is parallel to the axis of the fixed disk assembly. The two end faces of the thickness gradient disks are symmetrical spiral gradient surfaces. The parallel groove shaft passes through the end face of the linkage ring and can rotate relative to the linkage ring and move along the axis. After passing through the movable outer shell, the parallel groove shaft is connected to the power mechanism. The power mechanism controls the rotation of the parallel groove shaft. The thickness gradient disks are sleeved on the outside of the parallel groove shaft and can move horizontally on the surface of the parallel groove shaft while rotating with it.

[0027] The thickness gradient disk has an inner rod in contact with the linkage ring on one side, and the inner rod is fixed to the linkage ring. The thickness gradient disk has an outer rod in contact with the other side, and the outer rod is fixed to the fixed disk assembly on the corresponding side of the linkage ring.

[0028] In summary, the present invention has the following beneficial technical effects: This invention employs a first mixing mechanism and a second mixing mechanism to perform a mixing process. First, the pulp added to the outer shell is initially mixed. The pulp after the initial mixing is then ground between the stationary platen assembly and the rotary platen assembly. After grinding, the pulp passes through the second mixing mechanism, which further mixes the material entering the stationary platen assembly and the rotary platen assembly for grinding. This prevents the pulp from separating again due to grinding resistance. The pulp after the second mixing undergoes another grinding process to ensure the mixing degree of the pulp. After subsequent pumping, the pulp flows stably between the stationary platen assembly and the rotary platen assembly.

[0029] This invention utilizes a combination of mechanisms including an arc-shaped gear ring frame, a full gear ring, an outer mixing frame, and a stirring rod. As the feed disc follows the shaft power assembly, the main gear and the full gear ring rotate, simultaneously engaging the secondary gear with the arc-shaped toothed plate structure of the inner ring of the arc-shaped gear ring frame. Due to the circumferential misalignment of the arc-shaped toothed plate structure on the inner side of the arc-shaped gear ring frame, at most one of the multiple secondary gears connected to the same inner shaft engages with the inner side of the arc-shaped gear ring frame. Furthermore, because the tooth ratios between the secondary gear and the main gear, and between the arc-shaped gear ring frame and the full gear ring, are different, the rotational speeds of the outer mixing frame and the stirring rod differ during the rotation of the feed disc. The relative rotation of the outer mixing frame and the stirring rod causes a double agitation of the passing pulp, generating flow impact and increasing the mixing effect.

[0030] This invention utilizes a combination of mechanisms such as a thickness gradient disc, inner rods, and outer rods. The thickness detection disc has symmetrical spiral gradient surfaces on both sides, causing the thickness of the disc to gradually change in the circumferential direction. When it is necessary to change the grinding accuracy, the distance between the two fixed disc components is changed by an axial displacement mechanism. At the same time, the parallel groove shaft is controlled to rotate, causing the two corresponding thickness gradient discs to rotate at the same angle, pushing the inner and outer rods in contact, thus ensuring that the distance between the two fixed disc components and the rotating grinding disc is limited. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the outer shell in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the guide plate and the concentric cylinder in an embodiment of the present invention; Figure 4 This is a top view schematic diagram of some structures in an embodiment of the present invention; Figure 5 This is a schematic diagram of the inner structure distribution of the concentric cylinder in an embodiment of the present invention; Figure 6 This is a schematic diagram of the distribution of stirring rods in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the feed tray in an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of an embodiment of the present invention; Figure 9 This is a schematic diagram showing the partial structure unfolded in an embodiment of the present invention; Figure 10 This is a schematic diagram of the connection between the stirring blade and the shaft in an embodiment of the present invention.

[0032] Reference numerals: 1. Machine base; 2. Shaft power assembly; 3. Outer shell; 31. Fixed outer shell; 32. Movable outer shell; 33. Axial displacement mechanism; 4. Fixed plate assembly; 5. Turntable assembly; 51. Rotary grinding disc; 511. Discharge hole; 52. Linkage ring; 53. Combined cavity; 54. Guide channel; 55. Distance limiting mechanism; 551. Parallel groove shaft; 552. Thickness gradient disc; 553. Inner rod; 554. Outer rod; 56. Power mechanism; 6. First mixing processing mechanism; 61. Same 611. Core tube; 612. Guide plate; 613. Feeding disc; 64. Feeding ring groove; 65. Outer mixing frame; 66. Inner mixing frame; 67. Inner shaft; 68. Stirring rod; 69. Gear and ring meshing assembly; 60. Full gear ring; 61. Arc-shaped gear ring frame; 62. Main gear; 63. Secondary gear; 74. Secondary mixing and processing mechanism; 75. Driven gear; 76. Shaft; 77. Stirring blade; 78. Concentric gear ring; 99. Feed pipe; 10. Discharge pipe; 110. Pretreatment chamber. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0034] This invention discloses a pulp refiner for papermaking. For example... Figures 1-10As shown, the device includes a machine base 1, a shaft power assembly 2, and a housing 3. The housing 3 can be separated. The housing 3 and the shaft power assembly 2 are mounted on the upper side of the machine base 1. One end of the shaft power assembly 2 is mounted inside the housing 3. The shaft power assembly 2 can rotate relative to the housing 3 and the machine base 1. A motor that outputs rotational power to the shaft power assembly 2 is mounted on the upper side of the machine base 1. A sealing structure is installed at the connection position between the shaft power assembly 2 and the housing 3.

[0035] Two fixed plate assemblies 4 are installed inside the outer casing 3. The fixed plate assemblies 4 are connected to the outer casing 3 by bolts. The fixed plate assemblies 4 can be replaced. The fixed plate assemblies 4 are coaxially arranged with the shaft power assembly 2. A turntable assembly 5 is arranged between the two fixed plate assemblies 4. The turntable assembly 5 is coaxially installed with the shaft power assembly 2. The turntable assembly 5 rotates synchronously with the shaft power assembly 2. The turntable assembly 5 rotates relative to the fixed plate assemblies 4 and the outer casing 3. There is a gap between the turntable assembly 5 and the fixed plate assemblies 4 for the flow of slurry.

[0036] The upper end of the outer shell 3 is equipped with a feed pipe 8 and a discharge pipe 9. The slurry is processed between the rotating disc assembly 5 and the fixed disc assembly 4. The slurry enters from the inner ring side of the rotating disc assembly 5 between the rotating disc assembly 5 and the fixed disc assembly 4, and then is discharged from the discharge pipe 9 after grinding.

[0037] The turntable assembly 5 includes a grinding disc 51 and a linkage ring 52. The inner ring surface of the linkage ring 52 is rotatably connected to the outer ring surface of the grinding disc 51. The linkage ring 52 is inserted into the housing 3. The linkage ring 52 moves along the axial direction inside the housing 3. The outer ring surface of the linkage ring 52 is prismatic, so that the linkage ring 52 can slide inside the housing 3 without rotating relative to the housing 3. The inner ring surface of the grinding disc 51 is coaxially mounted with the shaft power assembly 2. The grinding disc 51 can slide on the surface of the shaft power assembly 2 while rotating synchronously with the shaft power assembly 2.

[0038] A pretreatment chamber 10 is provided inside the outer shell 3. The feed pipe 8 is connected to the pretreatment chamber 10. A first mixing mechanism 6 is provided inside the pretreatment chamber 10. The first mixing mechanism 6 is coaxially connected to the shaft power assembly 2. After the slurry is premixed by the first mixing mechanism 6, it enters the space between the fixed plate assembly 4 from the inner ring side of the turntable assembly 5.

[0039] The first mixing and processing mechanism 6 includes a concentric cylinder 61 and a feeding disc 62. The concentric cylinder 61 is located between the feeding disc 62 and the fixed disc assembly 4. The feeding disc 62 is concentrically mounted on the outside of the shaft power assembly 2. One end of the concentric cylinder 61 is coaxially fixed with the end face of the feeding disc 62. The end face of the feeding disc 62 connected to the concentric cylinder 61 and located on the outer ring side of the concentric cylinder 61 is provided with a feeding ring groove 63. The end face of the feeding disc 62 connected to the concentric cylinder 61 and located on the inner ring side of the concentric cylinder 61 is provided with a discharge hole.

[0040] The slurry is added from the inside of the outer shell 3 through the feed pipe 8 and enters the outside of the concentric cylinder 61. Then the slurry enters the feed plate 62 through the feed ring groove 63 and fills the inside of the concentric cylinder 61 through the discharge hole.

[0041] An outer mixing frame 64 extends through the end face of the feed tray 62, located on the inner ring side of the concentric cylinder 61 and close to the concentric cylinder 61. The outer mixing frame 64 can rotate relative to the feed tray 62. The outer mixing frame 64 is composed of a closed end tube and multiple rods with uniform circumferential gaps. The end tube portion of the outer mixing frame 64 has slots on the inner side of the feed tray 62. The slurry in the feed tray 62 can enter the inner side of the outer mixing frame 64 through the slots and then move to the inner side of the concentric cylinder 61. An inner mixing frame 65 that can rotate relative to the outer mixing frame 64 is installed on the axial side of the outer mixing frame 64. A gear and ring meshing assembly 66 is installed on the inner side of the outer shell 3. When the feed tray 62 rotates with the shaft power assembly 2, the inner mixing frame 65 and the outer mixing frame 64 rotate around their own axes under the gear and ring meshing assembly 66.

[0042] The inner mixing frame 65 includes an inner shaft 651 and multiple stirring rods 652. The stirring rods 652 are arranged perpendicularly to the inner shaft 651. The inner shaft 651 is coaxially inserted into the inner side of the end tube of the outer mixing frame 64. The multiple stirring rods 652 are spirally distributed. As the stirring rods 652 rotate with the inner shaft 651, the stirring rods 652 can stir different fan-shaped parts within the circumference of the inner shaft 651, thereby increasing the mixing effect.

[0043] The gear ring meshing assembly 66 includes a full gear ring 661 and multiple arc-shaped gear ring holders 662. The full gear ring 661 is installed inside the housing 3 and is coaxially arranged with the shaft power assembly 2.

[0044] The main gear 663 is coaxially mounted on the end tube of the outer mixing frame 64, and the main gear 663 meshes with the inner ring surface of the full gear ring 661.

[0045] The inner shaft 651 is located inside each arc-shaped gear ring 662 and is equipped with a secondary gear 664. The inner ring surface of the arc-shaped gear ring 662 is composed of multiple arc-shaped tooth plates. The multiple arc-shaped tooth plate structures inside the multiple arc-shaped gear rings 662 are staggered along the circumferential direction of the feed plate 62 axis. The multiple secondary gears 664 connected to the same inner shaft 651 have different radii. The secondary gear 664 has a different radius than the main gear 663. The tooth ratios of the secondary gear 664 and the main gear 663, and the full gear ring 661 and the arc-shaped gear ring inside the arc-shaped gear ring 662 are different, ensuring that the outer mixing frame 64 and the inner shaft 651 rotate with the feed plate 62 at different speeds.

[0046] Multiple guide plates 611 are fixed on the outer ring surface of the concentric cylinder 61. The outer shell 3 is located on the outer ring side of the concentric cylinder 61 and has a conical cylindrical structure. The end of the outer shell 3 near the feed plate 62 is the small diameter end. The slurry entering the conical part of the outer shell 3 flows into the feed plate 62 from the small diameter end. The slurry moves from the large diameter end to the small diameter end, and the slurry is pressurized. After entering the feed plate 62, the pressure is released again. Under the pressure difference, the slurry is mixed.

[0047] The guide plate 611 is spirally bent, and multiple circumferentially arranged material-pushing plates 612 are installed on the inner ring surface of the outer shell 3. The guide plate 611 has a matching groove structure at the position of the material-pushing plates 612. It is located at the small diameter end of the conical part of the outer shell 3. The guide plate 611 limits the movement trajectory of the slurry. When the feed plate 62 drives the guide plate 611 to rotate through the concentric cylinder 61, the material-pushing plates 612 rotate relative to the guide plate 611 to prevent the slurry from clogging at the small diameter end between the outer shell 3 and the concentric cylinder 61.

[0048] A second mixing mechanism 7 is installed on the end face of the turntable assembly 5. The two ends of the second mixing mechanism 7 respectively mix the slurry between the two fixed plate assemblies 4 and the turntable assembly 5. The second mixing mechanism 7 is installed inside the outer shell 3.

[0049] The left and right sides of the rotating grinding disc 51 and the two fixed disc assemblies 4 are each provided with a combined cavity 53. The two combined cavities 53 located on the same side of the rotating grinding disc 51 form an annular cavity. The two ends of the second mixing processing mechanism 7 are located in the annular cavities on both sides of the rotating grinding disc 51.

[0050] Multiple guide grooves 54 are provided on the left and right sides of the rotating grinding disc 51 and the two fixed disc assemblies 4, respectively. The multiple guide grooves 54 are arranged in two groups and located on the inner and outer ring sides of the corresponding combined cavity 53. This allows the slurry to be ground first, then mixed in the combined cavity 53, and then mixed again in the outer guide grooves 54. The guide grooves 54 are Ω-shaped and curved to increase the flow distance of the slurry and improve the grinding effect. The guide grooves 54 are also provided with dividing shearing protrusions to prevent the slurry from flowing out directly without being ground. Multiple discharge holes 511 are provided on the end face of the rotating grinding disc 51. During the grinding process of the rotating grinding disc 51 relative to the fixed disc assembly 4, the ground slurry is discharged in time from the discharge holes 511 to prevent the slurry from being over-processed after repeated grinding.

[0051] The second mixing and processing mechanism 7 includes a driven gear 71 and a shaft 72. The driven gear 71 is located inside the rotating grinding disc 51. The driven gear 71 is coaxially connected to the shaft 72. Both ends of the shaft 72 penetrate the inner wall of the rotating grinding disc 51 and rotate relative to the rotating grinding disc 51. Both ends of the shaft 72 that pass through the rotating grinding disc 51 are equipped with stirring blades 73.

[0052] A concentric toothed ring 74 is fixed on the inner ring surface of the linkage ring 52. The driven gear 71 meshes with the inner ring surface of the concentric toothed ring 74. The concentric toothed ring 74 rotates inside the grinding disc 51. As the grinding disc 51 rotates, it drives the driven gear 71 to move in meshing with the inner ring surface of the concentric toothed ring 74. The driven gear 71 drives the stirring blade 73 to rotate around the shaft 72 by meshing with the concentric toothed ring 74, thus mixing the slurry in the combined cavity 53.

[0053] The outer casing 3 consists of a fixed outer casing 31 and a movable outer casing 32. The fixed outer casing 31 is fixed to the machine base 1, and the movable outer casing 32 is detachably connected to the fixed outer casing 31 by bolts. The movable outer casing 32 can be separated from the fixed outer casing 31.

[0054] An axial displacement mechanism 33 capable of being powered is installed on the axial side of the movable housing 32 away from the fixed housing 31. The fixed plate assembly 4 on the side of the rotating grinding disc 51 away from the shaft power assembly 2 is coaxially connected to the axial displacement mechanism 33. The axial displacement mechanism 33 drives the fixed plate assembly 4 to move along the axis of the shaft power assembly 2. The axial displacement mechanism 33 can push the contacted fixed plate assembly 4 to move inside the housing 3. The other fixed plate assembly 4 is fixed to the housing 3.

[0055] Multiple distance limiting mechanisms 55 pass through the end face of the linkage ring 52. The two ends of the distance limiting mechanism 55 are connected to two fixed plate components 4. One end of the distance limiting mechanism 55 passes through the movable housing 32. The distance limiting mechanism 55 can rotate relative to the movable housing 32. A power mechanism 56 for controlling the twisting of the distance limiting mechanism 55 is installed on the outside of the movable housing 32.

[0056] The distance limiting mechanism 55 includes a parallel groove shaft 551 and two thickness gradient disks 552. The parallel groove shaft 551 is parallel to the axis of the fixed disk assembly 4. The two end faces of the thickness gradient disks 552 are symmetrical spiral gradient surfaces, forming a spiral shape with gradually increasing thickness. The parallel groove shaft 551 passes through the end face of the linkage ring 52. After the movable housing 32 is separated from the fixed housing 31, the parallel groove shaft 551 can be pulled out from the linkage ring 52. At the same time, the thickness gradient disks 552 can be detached from the parallel groove shaft 551. The parallel groove shaft 551 can rotate and move along its axis relative to the linkage ring 52. The parallel groove shaft 551 passes through the movable housing 32 and is connected to the power mechanism 56. The power mechanism 56 controls the rotation of the parallel groove shaft 551. The thickness gradient disks 552 are sleeved on the outside of the parallel groove shaft 551. The thickness gradient disks 552 can move horizontally on the surface of the parallel groove shaft 551 while rotating with the parallel groove shaft 551.

[0057] The thickness gradient disk 552 has an inner rod 553 in contact with the linkage ring 52 on one side. The inner rod 553 is fixed to the linkage ring 52. The thickness gradient disk 552 has an outer rod 554 in contact with the other side. The outer rod 554 is fixed to the fixed disk assembly 4 on the corresponding side of the linkage ring 52. When the axial displacement mechanism 33 pushes the adjacent fixed disk assembly 4 to press the turntable assembly 5 and another fixed disk assembly 4, the thickness gradient disk 552 limits the gap between the rotating grinding disk 51 and the two fixed disk assemblies 4 by contacting the inner rod 553 and the outer rod 554 on both sides.

[0058] The working principle is as follows: The pulp enters the housing 3 through the feed pipe 8. The shaft power assembly 2 drives the turntable assembly 5 to rotate relative to the fixed plate assembly 4. The pulp first passes through the first mixing treatment mechanism 6, which performs preliminary mixing on the pulp. The mixed pulp then enters between the fixed plate assembly 4 and the turntable assembly 5. The turntable assembly 5 then performs pulping treatment on the pulp in the middle while rotating. When the pulp in the pulping process passes through the second mixing treatment mechanism 7, the second mixing treatment mechanism 7 performs secondary mixing treatment on the pulp after the initial pulping. The mixed pulp then continues to flow for pulping. The double-layer mixing increases the mixing state of the pulp during pulping and increases the pulping efficiency.

[0059] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pulp refiner for papermaking, comprising a machine base (1), a shaft power assembly (2), and a housing (3), the housing (3) being detachable, characterized in that: The outer shell (3) and the shaft power assembly (2) are mounted on the upper side of the machine base (1). One end of the shaft power assembly (2) is mounted inside the outer shell (3). The shaft power assembly (2) can rotate relative to the outer shell (3) and the machine base (1). Two fixed plate assemblies (4) are installed inside the outer shell (3). The fixed plate assembly (4) is coaxially arranged with the shaft power assembly (2). A turntable assembly (5) is arranged between the two fixed plate assemblies (4). The turntable assembly (5) is coaxially installed with the shaft power assembly (2). The turntable assembly (5) rotates relative to the fixed plate assembly (4) and the outer shell (3). The upper end of the outer shell (3) is equipped with a feed pipe (8) and a discharge pipe (9), and the turntable assembly (5) and the fixed plate assembly (4) rotate relative to each other to treat the slurry; The inner side of the outer shell (3) is provided with a pretreatment chamber (10), and the feed pipe (8) is connected to the pretreatment chamber (10). The inner side of the pretreatment chamber (10) is provided with a first mixing processing mechanism (6). The first mixing processing mechanism (6) is coaxially connected to the shaft power assembly (2). After the slurry is premixed by the first mixing processing mechanism (6), it enters the space between the fixed plate assembly (4) from the inner ring side of the turntable assembly (5). The turntable assembly (5) is equipped with a second mixing processing mechanism (7) at its end face. The two ends of the second mixing processing mechanism (7) respectively mix the slurry between the two fixed plate assemblies (4) and the turntable assembly (5). The second mixing processing mechanism (7) is installed inside the outer shell (3).

2. A pulp refiner for papermaking according to claim 1, characterized in that: The first mixing processing mechanism (6) includes a concentric cylinder (61) and a feeding disc (62). The concentric cylinder (61) is located between the feeding disc (62) and the fixed disc assembly (4). The feeding disc (62) is concentrically installed on the outside of the shaft power assembly (2). One end of the concentric cylinder (61) is coaxially fixed with the end face of the feeding disc (62). The end face of the feeding disc (62) connected to the concentric cylinder (61) and located on the outer ring side of the concentric cylinder (61) is provided with a feeding ring groove (63). The end face of the feeding disc (62) connected to the concentric cylinder (61) and located on the inner ring side of the concentric cylinder (61) is provided with a discharge hole. An outer mixing frame (64) is inserted through the end face of the feed tray (62) and on the inner ring side of the concentric cylinder (61) and close to the concentric cylinder (61). The outer mixing frame (64) can rotate relative to the feed tray (62). An inner mixing frame (65) that can rotate relative to the axis of the outer mixing frame (64) is installed. A gear and ring meshing assembly (66) is installed inside the outer shell (3). When the feed tray (62) rotates with the shaft power assembly (2), the inner mixing frame (65) and the outer mixing frame (64) rotate around their own axes under the gear and ring meshing assembly (66).

3. A pulp refiner for pulp manufacturing according to claim 2, characterized in that: The outer mixing frame (64) is composed of a closed end tube and multiple rods with uniform circumferential gaps. The inner mixing frame (65) includes an inner shaft (651) and multiple stirring rods (652). The stirring rods (652) are arranged perpendicularly to the inner shaft (651). The inner shaft (651) is coaxially rotatably inserted into the inner side of the end tube of the outer mixing frame (64). The multiple stirring rods (652) are spirally distributed.

4. A pulp refiner for papermaking according to claim 2 or 3, characterized in that: The gear ring meshing assembly (66) includes a full gear ring (661) and multiple arc-shaped gear ring holders (662). The full gear ring (661) is installed inside the outer casing (3) and is coaxially arranged with the shaft power assembly (2). The end tube portion of the outer mixing frame (64) is coaxially mounted with a main gear (663), which meshes with the inner ring surface of the full gear ring (661). The inner shaft (651) is located inside each arc-shaped gear ring (662) and a secondary gear (664) is provided. The inner ring surface of the arc-shaped gear ring (662) is composed of multiple arc-shaped tooth plates. The multiple arc-shaped tooth plate structures inside the multiple arc-shaped gear rings (662) are staggered along the circumferential direction of the feed plate (62) axis. The multiple secondary gears (664) connected by the same inner shaft (651) have different radii. The secondary gears (664) have different radii than the main gear (663).

5. A pulp refiner for pulp manufacturing according to claim 4, characterized in that: Multiple guide plates (611) are fixed on the outer ring surface of the concentric cylinder (61). The outer shell (3) located on the outer ring side of the concentric cylinder (61) has a conical cylindrical structure. The end of the outer shell (3) near the feed plate (62) is the small diameter end. The guide plate (611) is spirally bent, and multiple circumferentially arranged material-pulling plates (612) are installed on the inner ring surface of the outer shell (3). The guide plate (611) is provided with a matching groove structure at the position of the material-pulling plate (612).

6. A pulp refiner for papermaking according to claim 1, characterized in that: The turntable assembly (5) includes a grinding disc (51) and a linkage ring (52). The inner ring surface of the linkage ring (52) is rotatably connected to the outer ring surface of the grinding disc (51). The linkage ring (52) is inserted into the housing (3). The linkage ring (52) moves along the axial direction inside the housing (3). The inner ring surface of the grinding disc (51) is coaxially installed with the shaft power assembly (2). The grinding disc (51) can slide on the surface of the shaft power assembly (2) while rotating synchronously with the shaft power assembly (2). The left and right sides of the rotating grinding disc (51) and the two fixed disc assemblies (4) are each provided with a combined cavity (53). The two combined cavities (53) located on the same side of the rotating grinding disc (51) form an annular cavity. The two ends of the second mixing processing mechanism (7) are located in the annular cavities on both sides of the rotating grinding disc (51). The left and right sides of the rotating grinding disc (51) and the two fixed disc components (4) are provided with multiple guide grooves (54) on the side close to each other. The multiple guide grooves (54) are arranged in two groups and are located on the inner and outer ring sides of the corresponding combined cavity (53).

7. A pulp refiner for papermaking according to claim 6, characterized in that: The second mixing processing mechanism (7) includes a driven gear (71) and a shaft (72). The driven gear (71) is located inside the rotating grinding disc (51). The driven gear (71) and the shaft (72) are coaxially connected. Both ends of the shaft (72) penetrate the inner wall of the rotating grinding disc (51). The shaft (72) rotates relative to the rotating grinding disc (51). Both ends of the shaft (72) that pass through the rotating grinding disc (51) are equipped with stirring blades (73). The inner ring surface of the linkage ring (52) is fixed with a concentric toothed ring (74), and the driven gear (71) meshes with the inner ring surface of the concentric toothed ring (74). The concentric toothed ring (74) rotates inside the grinding disc (51).

8. A pulp refiner for pulp manufacturing according to claim 6 or 7, characterized in that: The outer shell (3) consists of a fixed outer shell (31) and a movable outer shell (32). The fixed outer shell (31) is fixed to the machine base (1), and the movable outer shell (32) is detachably connected to the fixed outer shell (31) by bolts. An axial displacement mechanism (33) capable of dynamic movement is installed on the axial side of the movable outer shell (32) away from the fixed outer shell (31). The fixed plate assembly (4) on the side of the rotating grinding disc (51) away from the shaft power assembly (2) is coaxially connected to the axial displacement mechanism (33). The axial displacement mechanism (33) drives the fixed plate assembly (4) to move along the axis of the shaft power assembly (2).

9. A pulp refiner for papermaking according to claim 6, characterized in that: The guide channel (54) is bent in an Ω shape, and the end face of the grinding disc (51) is provided with multiple discharge holes (511).

10. A pulp refiner for papermaking according to claim 8, characterized in that: Multiple distance limiting mechanisms (55) are passed through the end face of the linkage ring (52). The two ends of the distance limiting mechanism (55) are connected to two fixed plate components (4). One end of the distance limiting mechanism (55) passes through the movable shell (32). The distance limiting mechanism (55) can rotate relative to the movable shell (32). A power mechanism (56) for controlling the twisting of the distance limiting mechanism (55) is installed on the outside of the movable shell (32). The distance limiting mechanism (55) includes a parallel groove shaft (551) and two thickness gradient disks (552). The parallel groove shaft (551) is parallel to the axis of the fixed disk assembly (4). The two end faces of the thickness gradient disks (552) are symmetrical spiral gradient surfaces. The parallel groove shaft (551) passes through the end face of the linkage ring (52). The parallel groove shaft (551) can rotate relative to the linkage ring (52) and move along its axis. The parallel groove shaft (551) passes through the movable outer shell (32) and is connected to the power mechanism (56). The power mechanism (56) controls the rotation of the parallel groove shaft (551). The thickness gradient disks (552) are sleeved on the outside of the parallel groove shaft (551). The thickness gradient disks (552) can move horizontally on the surface of the parallel groove shaft (551) while rotating with the parallel groove shaft (551). The thickness gradient disk (552) has an inner rod (553) in contact with the side of the linkage ring (52), and the inner rod (553) is fixed to the linkage ring (52). The thickness gradient disk (552) has an outer rod (554) in contact with the other side, and the outer rod (554) is fixed to the fixed disk assembly (4) on the corresponding side of the linkage ring (52).

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