Coarse and fine pulp mixing device for papermaking and use method thereof

Abstract

The invention discloses a coarse and fine pulp mixing device for papermaking and a using method thereof, and relates to the technical field of papermaking pulp mixing, the coarse and fine pulp mixing device comprises an outer mixing barrel, a rotatable inner mixing barrel is arranged in the outer mixing barrel, and a spiral conveyor capable of conveying liquid at the bottom of the inner mixing barrel to the top of the inner mixing barrel is arranged in the inner mixing barrel; a plurality of main stirring rods are arranged at the bottom of the peripheral face of the spiral conveyor, a plurality of supporting columns capable of horizontally rotating are evenly arranged at the top end of the spiral conveyor, and a plurality of auxiliary stirring rods capable of moving back and forth in the axial direction of the supporting columns are arranged on the supporting columns. The slurry at the bottom of the inner mixing barrel can be promoted to be conveyed to the upper part of the inner mixing barrel, so that a high-density mixture at the bottom of the inner mixing barrel is conveyed to a low-density mixture at the upper part of the inner mixing barrel, the slurry can be better promoted to be mixed, the mixing efficiency is improved, and the phenomenon that the slurry is layered due to different densities is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of papermaking pulp mixing, and more specifically, to a coarse and fine pulp mixing device for papermaking and a method for using the same. Background Art

[0002] Pulp is also called paper stock. The pulp is beaten according to the type, properties and requirements of the paper to be made, and then mixed with water in a certain proportion. After that, glue, filler, colorant and other additives are added to make a fiber suspension for papermaking, which is called pulp. Before the pulp is sent to the papermaking machine, it needs to be purified, selected, degassed and other treatments to avoid affecting the quality of the finished product.

[0003] When water is mixed with the slurry, a mixing device is often needed to stir it. However, when the slurry is mixed, its dispersion performance is poor, and due to the difference in density between the pulp slurry and water, most of the pulp is retained at the bottom of the mixing barrel, resulting in low pulp mixing efficiency. The pulp slurry is difficult to mix with water quickly, which easily leads to a large difference in pulp concentration at different depths in the mixing barrel, affecting the quality of the mixed pulp fiber, such as the Chinese patent application number CN202321114839.9 and the application number CN202220439. Chinese patent No. 032.1 and Chinese patent application No. CN202120503974.7 are both devices for mixing pulp for paper production. However, in the above patents, the slurry is stirred by rotating the stirring roller for a long time, so the mixing efficiency is relatively slow, and it is easy to have a large difference in pulp concentration at different depths. In particular, the fibers in the papermaking pulp, especially the natural lignin and hemicellulose from wood pulp, have a certain viscosity. Therefore, when the slurry is mixed, fiber adhesion often occurs.

[0004] To this end, the present invention proposes a coarse and fine pulp mixing device for papermaking to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a coarse and fine pulp mixing device for papermaking and a method of using the same, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coarse and fine pulp mixing device for papermaking, comprising an outer mixing barrel, a rotatable inner mixing barrel is arranged in the outer mixing barrel, a screw conveyor is arranged in the inner mixing barrel and can transport the liquid at the bottom to the top, a plurality of main stirring rods are arranged at the bottom of the outer circumference of the screw conveyor, a plurality of horizontally rotatable support columns are evenly arranged at the top of the screw conveyor, and a plurality of auxiliary stirring rods that can move back and forth along the axial direction are arranged on the support columns, and an auxiliary stirring rod for driving the auxiliary stirring rod to move is arranged at the top of the inner circumference of the inner mixing barrel. Auxiliary driving component; a rotatable limiting cylinder is provided at the top end of the outer circumference of the screw conveyor, and a plurality of support columns are evenly fixedly connected to the outer circumference of the limiting cylinder; a sliding connecting plate is provided at the middle part of the auxiliary stirring rod, and the sliding connecting plate is slidably connected to the supporting column, and a first elastic member is provided between two adjacent sliding connecting plates, and one end of the supporting column close to the limiting cylinder is fixedly connected to the limiting plate, and the side of the limiting plate away from the limiting cylinder is adsorbed by the limiting sleeve, and the limiting sleeve is slidably connected to the supporting column, and the end of the limiting sleeve away from the limiting plate is fixedly connected to the sliding connecting plate corresponding thereto.

[0007] Preferably, the upper surface of the outer mixing barrel is rotatably connected to a driving roller having one end extending into the inner mixing barrel, and a motor for causing the driving roller to rotate is provided on the upper surface of the outer mixing barrel, the bottom end of the driving roller is fixedly connected to the auger of a screw conveyor, a liquid inlet is provided at the bottom of the screw conveyor, the bottom end of the inner mixing barrel is rotatably connected to the screw conveyor, and the top end of the inner mixing barrel is rotatably connected to the inner top surface of the outer mixing barrel.

[0008] Preferably, the limiting sleeve and the limiting plate are made of magnetic material, a mounting opening is provided in the middle of the auxiliary stirring rod, the sliding connecting plate is fixedly connected in the mounting opening, and the thickness of the sliding connecting plate is smaller than the length of the mounting opening.

[0009] Preferably, a guide ring block is fixedly connected to the top end of the inner circumference of the inner mixing barrel, and the inner ends of the upper ring surface and the lower ring surface of the guide ring block are both gathered toward the center of its axis, and the top end of the driving roller is evenly fixedly connected to a plurality of auxiliary driving rods one end of which is arranged on the guide ring block, and the auxiliary driving component is arranged on the auxiliary driving rod.

[0010] Preferably, the auxiliary driving component includes an auxiliary driving ring fixedly connected to the lower surfaces of multiple auxiliary driving rods, the lower surface of each auxiliary driving rod is fixedly connected to a guide block, the guide block and the auxiliary driving ring are in the same horizontal plane, the outer peripheral surfaces of the multiple limiting sleeves are fixedly connected to a driven rod with one end extending between the auxiliary driving ring and the guide block, and the top end of the driven rod is fixedly connected to the driven block.

[0011] Preferably, the driven block is semi-cylindrical in shape, and the inner circumferential surface of the auxiliary driving ring and the side surface of the driven block are both provided with clamping strips that can be clamped with each other.

[0012] Preferably, a plurality of ejection outlets are evenly opened on the inner circumference of the inner mixing barrel, a sealing plate capable of closure of the ejection outlet is fixedly connected to the auxiliary stirring rod farthest from the screw conveyor, a limiting ring is fixedly connected to the top of the outer circumference of the screw conveyor, and the limiting cylinder is rotatably connected to the limiting ring.

[0013] Preferably, a plurality of auxiliary limiting grooves are provided on both the upper and lower surfaces of the limiting ring, and a limiting ball head having one end which can be clamped on the limiting cylinder is slidably connected in the auxiliary limiting groove, and the inner side surface of the limiting ball head is fixedly connected to a second elastic member having one end arranged on the inner wall of the auxiliary limiting groove.

[0014] Preferably, a slot is provided on a side of the auxiliary stirring rod close to the screw conveyor, and a plurality of blocks adapted to the slot are provided on a side of the auxiliary stirring rod away from the screw conveyor.

[0015] A method for using a coarse and fine pulp mixing device for papermaking is also provided, comprising the following steps: S1. Pour coarse slurry, fine slurry and water into the inner mixing barrel; S2. Start the motor to stir the mixture; S3. Turn off the motor and take out the mixed material; S4. Filter the mixed material to obtain slurry.

[0016] The present invention provides a coarse and fine pulp mixing device for papermaking and a method for using the same, which have the following beneficial effects: 1. The coarse and fine pulp mixing device for papermaking can promote the pulp at the bottom of the inner mixing barrel to be transported to the upper part thereof by setting a screw conveyor, thereby sending the high-density mixture at the bottom of the inner mixing barrel to the low-density mixture at the upper part thereof, thereby promoting the mixing of the materials better, thereby greatly improving the mixing efficiency, and easily breaking the stratification phenomenon of the materials due to different densities.

[0017] 2. The coarse and fine pulp mixing device for papermaking is provided with a plurality of auxiliary stirring rods. When the slurry in the inner mixing barrel is continuously rotating, the slurry will quickly pass through the auxiliary stirring rods erected in the inner mixing barrel. After the slurry passes through the auxiliary stirring rods, double rows of line vortices with opposite rotation directions and regular arrangement will be periodically shed on both sides of the auxiliary stirring rods. Therefore, the appearance of the line vortex will disturb the flowing slurry, thereby breaking the state of rotation or vortex of the slurry due to inertia, thereby greatly improving its mixing efficiency.

[0018] 3. The coarse and fine pulp mixing device for papermaking can cause the auxiliary stirring rods on a support column to collide with each other through the setting of the auxiliary driving ring and the guide block, thereby temporarily forming a "space plate". When the auxiliary stirring rods on each support column collide with each other, two circumferentially adjacent space plates will form a new space. At the same time, the slurry in the new space will be subjected to a greater centrifugal force under the continuous rotation of the inner mixing barrel, so that the slurry in the new space will be sprayed along the inclined direction of the guide ring block under the action of centrifugal force, so that the slurry sprayed in multiple new spaces will be intertwined, thereby forming a hedging phenomenon, so that the adhered fibers can be effectively impacted and the mixing effect can be greatly increased. At the same time, through the setting of the throwing outlet, when the inner mixing barrel continues to rotate, the slurry will be thrown from the throwing outlet onto the inner circumference of the outer mixing barrel (the throwing outlet is not blocked by the sealing plate at this time), thereby effectively reducing the occurrence of limited adhesion. A second liquid inlet is also provided at the bottom end of the screw conveyor. Through the setting of the second liquid inlet, the thrown slurry can be collected into the inner mixing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0020] Figure 2 This is a schematic structural diagram of the auxiliary stirring rod of the present invention in the first state.

[0021] Figure 3 This is a schematic diagram of the structure of the auxiliary stirring rod of the present invention in the second state.

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0023] Figure 5 It is a schematic diagram of the matching structure of the auxiliary driving ring, the guide block and the driven block of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the support column of the present invention.

[0025] Figure 7 It is a schematic structural diagram of the guide ring block of the present invention.

[0026] In the figure: 1. external mixing barrel; 2. coarse slurry pipe; 3. fine slurry pipe; 4. driving roller; 5. guide ring block; 6. auxiliary driving ring; 7. guide block; 10. auxiliary driving rod; 11. driven block; 12. driven rod; 13. auxiliary stirring rod; 14. sliding connecting plate; 15. slot; 16. ejection outlet; 17. limiting sleeve; 18. limiting plate; 19. supporting column; 20. limiting cylinder; 21. limiting ring; 22. screw conveyor; 23. main stirring rod; 24. block; 25. internal mixing barrel; 26. sealing plate; 27. limiting ball head; 28. second elastic member; 29. ​​first elastic member. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1 When the pulp is mixed with water, since the dispersion performance of the pulp is poor and due to the difference in density between the pulp slurry and water, most of the pulp is retained at the bottom of the mixing barrel, resulting in low pulp mixing efficiency. This embodiment is specially invented to solve the above problems.

[0029] See also Figure 1 to Figure 2 The present invention provides a coarse and fine pulp mixing device for papermaking, comprising an outer mixing barrel 1, wherein a coarse pulp pipe 2 and a fine pulp pipe 3 are arranged on the upper surface of the outer mixing barrel 1, and a water injection port is also arranged, and a rotatable inner mixing barrel 25 is arranged in the outer mixing barrel 1, wherein there is a space between the outer mixing barrel 1 and the inner mixing barrel 25 (such as Figure 2 As shown in the figure, a screw conveyor 22 capable of conveying liquid from its bottom to its top is provided in the inner mixing barrel 25, and a plurality of main stirring rods 23 are provided at the bottom of the outer circumference of the screw conveyor 22. Therefore, the main stirring rods 23 will never rotate. Therefore, when the inner mixing barrel 25 rotates, the coarse slurry pipe 2 will cause the liquid therein to rotate, thereby mixing it through the main stirring rods 23. A plurality of horizontally rotatable support columns 19 are evenly provided at the top of the screw conveyor 22, and a plurality of auxiliary stirring rods 13 capable of moving back and forth along the axial direction are provided on the support columns 19. An auxiliary driving component for driving the auxiliary stirring rods 13 to move is provided at the top of the inner circumference of the inner mixing barrel 25.

[0030] The upper surface of the outer mixing barrel 1 is rotatably connected to a driving roller 4 having one end extending into the inner mixing barrel 25, and a motor is provided on the upper surface of the outer mixing barrel 1 for causing the driving roller 4 to rotate, so when the motor is working, the driving roller 4 can be caused to rotate, and the bottom end of the driving roller 4 is fixedly connected to the auger of the screw conveyor 22, so when the driving roller 4 rotates, the screw conveyor 22 can be caused to work, thereby causing the material at the bottom of the inner mixing barrel 25 to be transported to its upper part, and a liquid inlet is provided at the bottom of the screw conveyor 22, through the setting of the liquid inlet, the liquid at the bottom of the inner mixing barrel 25 can be caused to flow into the screw conveyor 22, the bottom end of the inner mixing barrel 25 is rotatably connected to the screw conveyor 22, and the top end of the inner mixing barrel 25 is rotatably connected to the inner top surface of the outer mixing barrel 1.

[0031] By setting up the screw conveyor 22, the slurry at the bottom of the inner mixing barrel 25 can be transported to its upper part, so as to transport the high-density mixture at the bottom of the inner mixing barrel 25 to the low-density mixture at its upper part, so as to better promote the mixing of the materials, thereby greatly improving the mixing efficiency and easily breaking the stratification of materials due to different densities.

[0032] Embodiment 2 In reality, liquid has inertia. Therefore, when the slurry is mixed in the inner mixing barrel 25, it will also rotate or vortex due to inertia. Therefore, when the inner mixing barrel 25 rotates, the slurry will cause the mixing efficiency to be greatly reduced due to inertia. This embodiment is specially invented to solve the above problem.

[0033] See also Figures 2 to 7 On the basis of the above embodiment, the technical solution adopted includes that a rotatable limiting cylinder 20 is provided at the top end of the outer peripheral surface of the screw conveyor 22, and a plurality of support columns 19 are evenly fixedly connected to the outer peripheral surface of the limiting cylinder 20. A sliding connecting plate 14 is provided in the middle of the auxiliary stirring rod 13, and the sliding connecting plate 14 is slidably connected to the supporting column 19, wherein the cross-section of the supporting column 19 is elliptical, so the sliding connecting plate 14 can only slide on the supporting column 19 along its axial direction, and will not rotate on the supporting column 19, and a first elastic member 29 is provided between two adjacent sliding connecting plates 14, and one end of the supporting column 19 close to the limiting cylinder 20 is fixedly connected to the limiting plate 18, and the side of the limiting plate 18 away from the limiting cylinder 20 adsorbs the limiting sleeve 17, and the limiting sleeve 17 is slidably connected to the supporting column 19, and the end of the limiting sleeve 17 away from the limiting plate 18 is fixedly connected to the corresponding sliding connecting plate 14.

[0034] The limiting sleeve 17 and the limiting plate 18 are made of magnetic materials, so when the limiting sleeve 17 is adsorbed on the limiting plate 18, it can temporarily stabilize the auxiliary stirring rod 13. An installation opening is opened in the middle of the auxiliary stirring rod 13, and the sliding connecting plate 14 is fixedly connected in the installation opening, and the thickness of the sliding connecting plate 14 is less than the length of the installation opening. Therefore, when two adjacent auxiliary stirring rods 13 collide with each other, the first elastic member 29 between the two sliding connecting plates 14 can be hidden in the two installation openings. At the same time, in order to prevent the sliding connecting plate 14 closest to the inner circumference of the inner mixing barrel 25 from detaching from the support column 19 during movement, the thickness of the sliding connecting plate 14 will be greater than that of other sliding connecting plates 14, thereby preventing the sliding connecting plate 14 from detaching from the support column 19 during sliding.

[0035] By setting up multiple auxiliary stirring rods 13, when the slurry in the inner mixing barrel 25 continues to rotate, the slurry will quickly pass through the auxiliary stirring rods 13 erected in the inner mixing barrel 25. After passing through the auxiliary stirring rods 13, the two sides of the auxiliary stirring rods 13 will periodically fall off to form a double row of line vortices (Karman vortex street principle) that are opposite to the rotation direction and arranged regularly. Therefore, the appearance of line vortices will disturb the flowing slurry, thereby breaking the state of rotation or vortexing of the slurry due to inertia, thereby greatly improving its mixing efficiency.

[0036] Embodiment 3 Although the setting of multiple auxiliary stirring rods 13 can improve the mixing efficiency by breaking the rotating or vortexing state of the slurry due to inertia, the fibers in the papermaking slurry, especially the natural lignin and hemicellulose from the wood pulp, have a certain viscosity. Therefore, when the slurry is mixed, the fibers often stick together. This embodiment is specially invented to solve the above problem.

[0037] See also Figures 2 to 7 On the basis of the above embodiment, the technical solution adopted includes that the top of the inner circumference of the inner mixing barrel 25 is fixedly connected with a guide ring block 5, and the inner end of the upper ring surface and the inner end of the lower ring surface of the guide ring block 5 are gathered toward the center of the axis, so as to form Figure 2 and Figure 3 In the shape of the figure, the top end of the driving roller 4 is evenly fixedly connected with a plurality of auxiliary driving rods 10, one end of which is arranged on the guide ring block 5. Therefore, when the driving roller 4 rotates, the setting of the auxiliary driving rods 10 and the guide ring block 5 can cause the inner mixing barrel 25 to rotate, and the auxiliary driving components are arranged on the auxiliary driving rods 10.

[0038] The auxiliary driving component includes an auxiliary driving ring 6 fixedly connected to the lower surface of a plurality of auxiliary driving rods 10, and a guide block 7 is fixedly connected to the lower surface of each auxiliary driving rod 10, and the guide block 7 and the auxiliary driving ring 6 are both on the same horizontal plane (such as Figure 5As shown), when the auxiliary drive rod 10 rotates, the guide block 7 and the auxiliary drive ring 6 will be prompted to rotate synchronously, and the outer circumferences of multiple limit sleeves 17 are fixedly connected to a driven rod 12 with one end extending between the auxiliary drive ring 6 and the guide block 7, and the top of the driven rod 12 is fixedly connected to the driven block 11.

[0039] The shape of the driven block 11 is semi-cylindrical, and the inner circumferential surface of the auxiliary driving ring 6 and the side surface of the driven block 11 are provided with clips that can be clipped to each other. The shape of the guide block 7 is irregular, so when the guide block 7 rotates circumferentially around the driving roller 4, the semi-cylindrical surface of the driven block 11 will contact the side surface of the guide block 7 (from the Figure 5 The guide block 7 will rotate in the clockwise direction), so the driven block 11 will approach the inner circumference of the auxiliary drive ring 6 along the inclined direction of the side of the guide block 7, and finally the auxiliary drive ring 6 and the clamping strips on the driven block 11 will be engaged with each other, so that the driven block 11 will rotate with the auxiliary drive ring 6 until the driven block 11 is separated from the guide block 7, and then the driven block 11 will be separated from the auxiliary drive ring 6, wherein through the setting of the limiting ball head 27, when the side of the driven block 11 and the guide block 7 are from contact to separation, the limiting cylinder 20 will not rotate, and only when the auxiliary drive ring 6 is forcibly moved with the driven block 11, the limiting cylinder 20 will rotate, and at the same time, when the limiting cylinder 20 rotates, the limiting ball head 27 will also be completely retracted from the limiting cylinder 20 to the limiting ring 21, and finally when the driven block 11 is separated from the guide block 7, the limiting ball head 27 will be engaged in the limiting cylinder 20 again, thereby limiting the limiting cylinder 20 again.

[0040] A plurality of ejection outlets 16 are evenly arranged on the inner circumference of the inner mixing barrel 25, and a sealing plate 26 that can close the ejection outlet 16 is fixedly connected to the auxiliary stirring rod 13 farthest from the screw conveyor 22, wherein the number of the ejection outlet 16 and the sealing plate 26 are four, and the positions correspond to each other, a limiting ring 21 is fixedly connected to the top of the outer circumference of the screw conveyor 22, and the limiting cylinder 20 is rotatably connected to the limiting ring 21, and a plurality of auxiliary limiting grooves are arranged on the upper and lower surfaces of the limiting ring 21, and a limiting ball head 27 with one end capable of being clamped on the limiting cylinder 20 is slidably connected in the auxiliary limiting groove, and a second elastic member 28 with one end arranged on the inner wall of the auxiliary limiting groove is fixedly connected to the inner side surface of the limiting ball head 27, wherein two corresponding upper and lower limiting ball heads 27 are a group, and each group of limiting ball heads 27 corresponds to the position of a support column 19.

[0041] A slot 15 is provided on the side of the auxiliary stirring rod 13 close to the screw conveyor 22, and a plurality of blocks 24 adapted to the slot 15 are provided on the side of the auxiliary stirring rod 13 away from the screw conveyor 22, wherein the top end of the auxiliary stirring rod 13 can abut against the guide ring block 5, and the bottom end of the auxiliary stirring rod 13 can abut against the inner bottom surface of the inner mixing barrel 25 (such as Figure 3 As shown), the arrangement of the card slot 15 and the card block 24 can greatly increase the stability of the auxiliary stirring rod 13 when combined.

[0042] By setting the auxiliary driving ring 6 and the guide block 7, the auxiliary stirring rods 13 on a support column 19 can be caused to collide with each other, thereby temporarily forming a "space plate". When the auxiliary stirring rods 13 on each support column 19 collide with each other, two circumferentially adjacent space plates will form a new space. At the same time, under the continuous rotation of the inner mixing barrel 25, the slurry in the new space will be subjected to a greater centrifugal force, so that the slurry in the new space will be ejected along the inclined direction of the guide ring block 5 under the action of the centrifugal force, so that the slurries ejected from multiple new spaces will interweave. Together, thus forming a counter-attack phenomenon, so that the adhering fibers can be effectively impacted and the mixing effect can be greatly increased. At the same time, through the setting of the throwing outlet 16, when the inner mixing barrel 25 continues to rotate, the slurry will be thrown from the throwing outlet 16 onto the inner circumference of the outer mixing barrel 1 (at this time, the throwing outlet 16 is not blocked by the sealing plate 26), so as to effectively reduce the occurrence of limited adhesion, and a second liquid inlet is also provided at the bottom end of the screw conveyor 22. Through the setting of the second liquid inlet, the thrown slurry can be collected in the inner mixing barrel 25.

[0043] Embodiment 4 On the basis of the above embodiment, this embodiment further provides a method for using a coarse and fine pulp mixing device for papermaking, comprising the following specific steps: S1. Pour the coarse slurry, fine slurry and water into the mixing barrel 25 in proportion; S2. Start the motor to stir the mixture; S3. Turn off the motor and take out the mixed material; when the personnel take out the material, the mixed material is discharged through the liquid outlet pipe; S4. Filter the mixed material to obtain slurry.

[0044] In summary, when the coarse and fine pulp mixing device for papermaking is used, the pulp is poured into the inner mixing barrel 25 through the coarse pulp pipe 2 and the fine pulp pipe 3, and then the water to be mixed is injected through the water injection port, and then the motor starts working to mix the materials.

[0045] When the driving roller 4 rotates one circle, the auxiliary stirring rod 13 on each support column 19 will be combined and separated four times, and each combination is completed by the movement of the driven rod 12, and each separation is completed by the first elastic member 29. At the same time, each time the auxiliary stirring rod 13 is separated, it will be restored to its initial position through the setting of the limiting sleeve 17 and the limiting plate 18, so as to ensure that the next combination can be completed normally.

[0046] When the slurry mixing is completed, the personnel can discharge the liquid in the inner mixing barrel 25 through the liquid outlet pipe arranged at the bottom of the outer mixing barrel 1. At the same time, because the liquid outlet pipe is only connected to the outer mixing barrel 1, the liquid in the inner mixing barrel 25 will flow from the liquid inlet to the second liquid inlet, and then flow to the space between the outer mixing barrel 1 and the inner mixing barrel 25, and finally can be discharged from the liquid outlet pipe.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for mixing coarse and fine pulp for papermaking, comprising an external mixing barrel (1), characterized in that: The outer mixing barrel (1) is provided with a rotatable inner mixing barrel (25), the inner mixing barrel (25) is provided with a screw conveyor (22) capable of conveying liquid at the bottom thereof to the top thereof, a plurality of main stirring rods (23) are provided at the bottom of the outer circumference of the screw conveyor (22), a plurality of horizontally rotatable support columns (19) are evenly provided at the top of the screw conveyor (22), and a plurality of auxiliary stirring rods (13) capable of moving back and forth along the axial direction thereof are provided on the support columns (19), and an auxiliary driving component for driving the auxiliary stirring rods (13) to move is provided at the top of the inner circumference of the inner mixing barrel (25); A rotatable limiting cylinder (20) is provided at the top end of the outer peripheral surface of the screw conveyor (22), and a plurality of the support columns (19) are evenly fixedly connected to the outer peripheral surface of the limiting cylinder (20). A sliding connecting plate (14) is provided in the middle of the auxiliary stirring rod (13), and the sliding connecting plate (14) is slidably connected to the supporting column (19), and a first elastic member (29) is provided between two adjacent sliding connecting plates (14). One end of the supporting column (19) close to the limiting cylinder (20) is fixedly connected to the limiting plate (18), and the side of the limiting plate (18) away from the limiting cylinder (20) adsorbs the limiting sleeve (17), and the limiting sleeve (17) is slidably connected to the supporting column (19), and one end of the limiting sleeve (17) away from the limiting plate (18) is fixedly connected to the corresponding sliding connecting plate (14).

2. The device for mixing coarse and fine pulp for papermaking according to claim 1, characterized in that: The upper surface of the outer mixing barrel (1) is rotatably connected to a driving roller (4) having one end extending into the inner mixing barrel (25), and a motor for causing the driving roller (4) to rotate is provided on the upper surface of the outer mixing barrel (1), the bottom end of the driving roller (4) is fixedly connected to the auger of a screw conveyor (22), the bottom of the screw conveyor (22) is provided with a liquid inlet, the bottom end of the inner mixing barrel (25) is rotatably connected to the screw conveyor (22), and the top end of the inner mixing barrel (25) is rotatably connected to the inner top surface of the outer mixing barrel (1).

3. The device for mixing coarse and fine pulp for papermaking according to claim 2, characterized in that: The limiting sleeve (17) and the limiting plate (18) are made of magnetic material, a mounting opening is provided in the middle of the auxiliary stirring rod (13), the sliding connecting plate (14) is fixedly connected in the mounting opening, and the thickness of the sliding connecting plate (14) is smaller than the length of the mounting opening.

4. The device for mixing coarse and fine pulp for papermaking according to claim 3, characterized in that: A guide ring block (5) is fixedly connected to the top of the inner circumferential surface of the inner mixing barrel (25), the inner ends of the upper ring surface and the lower ring surface of the guide ring block (5) are both gathered towards the center of the axis, and a plurality of auxiliary drive rods (10) are evenly fixedly connected to the top of the driving roller (4), one end of each of which is arranged on the guide ring block (5), and the auxiliary drive component is arranged on the auxiliary drive rod (10).

5. The device for mixing coarse and fine pulp for papermaking according to claim 4, characterized in that: The auxiliary drive component comprises an auxiliary drive ring (6) fixedly connected to the lower surface of a plurality of auxiliary drive rods (10), the lower surface of each of the auxiliary drive rods (10) is fixedly connected to a guide block (7), the guide block (7) and the auxiliary drive ring (6) are both on the same horizontal plane, and the outer circumferences of the plurality of limit sleeves (17) are fixedly connected to a driven rod (12) having one end extending between the auxiliary drive ring (6) and the guide block (7), and the top end of the driven rod (12) is fixedly connected to the driven block (11).

6. The device for mixing coarse and fine pulp for papermaking according to claim 5, characterized in that: The driven block (11) is semi-cylindrical in shape, and the inner circumferential surface of the auxiliary drive ring (6) and the side surface of the driven block (11) are both provided with clamping strips capable of being clamped to each other.

7. The device for mixing coarse and fine pulp for papermaking according to claim 6, characterized in that: The inner circumference of the inner mixing barrel (25) is evenly provided with a plurality of ejection outlets (16); a sealing plate (26) capable of closing the ejection outlet (16) is fixedly connected to the auxiliary stirring rod (13) farthest from the screw conveyor (22); a limiting ring (21) is fixedly connected to the top of the outer circumference of the screw conveyor (22), and the limiting cylinder (20) is rotatably connected to the limiting ring (21).

8. The device for mixing coarse and fine pulp for papermaking according to claim 7, characterized in that: The upper and lower surfaces of the limiting ring (21) are provided with a plurality of auxiliary limiting grooves, wherein a limiting ball head (27) having one end capable of being snap-fitted onto the limiting cylinder (20) is slidably connected in the auxiliary limiting groove, and the inner side surface of the limiting ball head (27) is fixedly connected to a second elastic member (28) having one end disposed on the inner wall of the auxiliary limiting groove.

9. The device for mixing coarse and fine pulp for papermaking according to claim 8, characterized in that: A slot (15) is provided on a side of the auxiliary stirring rod (13) close to the screw conveyor (22), and a plurality of blocks (24) adapted to the slot (15) are provided on a side of the auxiliary stirring rod (13) away from the screw conveyor (22).

10. A method for using a coarse and fine pulp mixing device for papermaking, using the coarse and fine pulp mixing device for papermaking according to claim 9 to mix pulp, characterized in that: The following steps are involved: S1. Pour the coarse slurry, the fine slurry and water into the inner mixing barrel (25); S2. Start the motor to stir the mixture; S3. Turn off the motor and take out the mixed material; S4. Filter the mixed material to obtain slurry.

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