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

Abstract

The present invention discloses a coarse and fine pulp mixing device for papermaking and a method of using the same, which relates to the technical field of papermaking pulp mixing, and comprises an outer mixing barrel, wherein a rotatable inner mixing barrel is provided in the outer mixing barrel, and a screw conveyor is provided in the inner mixing barrel for conveying liquid at the bottom thereof to the top thereof, and a plurality of main stirring rods are provided at the bottom of the outer peripheral surface of the screw conveyor, and a plurality of horizontally rotatable support columns are evenly provided at the top of the screw conveyor, and a plurality of auxiliary stirring rods that can move back and forth along the axial direction thereof are provided on the support columns. Through the provision of the screw conveyor, the pulp at the bottom of the inner mixing barrel can be conveyed to the upper part thereof, thereby conveying the high-density mixture at the bottom of the inner mixing barrel to the low-density mixture at the upper part thereof, thereby better promoting the mixing of the pulp, improving the mixing efficiency, and preventing the pulp from being stratified due to different densities.

Description

Technical Field

[0001] The present invention relates to the technical field of papermaking pulp mixing, and more particularly 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 slurry, a mixing device is often needed to stir it. However, the dispersion performance of the slurry is poor during mixing. Moreover, 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 large differences in pulp concentration at different depths in the mixing barrel, affecting the quality of the mixed pulp fiber. For example, Chinese patent application number CN202321114839.9 and 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 pulp 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 the concentration of pulp 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 pulp 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 for 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 provided in the outer mixing barrel, a screw conveyor provided in the inner mixing barrel that can transport the liquid at its bottom to its top, a plurality of main stirring rods provided at the bottom of the outer circumference of the screw conveyor, a plurality of horizontally rotatable support columns evenly provided at the top of the screw conveyor, and a plurality of auxiliary stirring rods that can move back and forth along the axial direction thereof are provided on the support columns, and an auxiliary stirring rod for driving the auxiliary stirring rod to move is provided 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 multiple 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 support column, and a first elastic member is provided between two adjacent sliding connecting plates, and one end of the support 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 adsorbs the limiting sleeve, and the limiting sleeve is slidably connected to the support 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 the upper surface of the outer mixing barrel is provided with a motor for causing the driving roller to rotate, the bottom end of the driving roller is fixedly connected to the auger of the screw conveyor, the bottom of the screw conveyor is provided with a liquid inlet, 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. 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 on the same horizontal plane, the outer peripheral surfaces of 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 a 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 to each other.

[0012] Preferably, a plurality of ejection outlets are evenly opened on the inner circumference of the inner mixing barrel, and a sealing plate capable of closing the ejection outlet is fixedly connected to the auxiliary stirring rod farthest from the screw conveyor, and 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 the upper and lower surfaces of the limiting ring, and a limiting ball head having one end that 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 the side of the auxiliary stirring rod close to the screw conveyor, and a plurality of blocks adapted to the slot are provided on the side of the auxiliary stirring rod away from the screw conveyor.

[0015] Also provided is a method for using a coarse and fine pulp mixing device for papermaking, comprising the following steps:

[0016] S1. Pour coarse slurry, fine slurry and water into the mixing barrel;

[0017] S2. Start the motor to stir the mixture;

[0018] S3. Turn off the motor and take out the mixed material;

[0019] S4. Filter the mixed material to obtain a slurry.

[0020] 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:

[0021] 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 transporting the high-density mixture at the bottom of the inner mixing barrel to the low-density mixture at the upper part thereof, thereby better promoting the mixing of the materials, thereby greatly improving the mixing efficiency, and easily breaking the stratification phenomenon of the materials due to different densities.

[0022] 2. The coarse and fine pulp mixing device for papermaking is equipped with multiple auxiliary stirring rods. When the slurry in the inner mixing barrel continues to rotate, 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 periodically fall off on both sides of the auxiliary stirring rods. Therefore, the appearance of line vortices 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.

[0023] 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, under the continuous rotation of the inner mixing barrel, 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 under the action of centrifugal force, so that the slurry ejected from multiple new spaces will be intertwined, forming a counter-attack phenomenon, thereby effectively impacting the adhered fibers and greatly increasing the mixing effect. 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

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0025] Figure 2 This is a schematic structural diagram of the auxiliary stirring rod of the present invention in the first state.

[0026] Figure 3 This is a schematic structural diagram of the auxiliary stirring rod of the present invention in the second state.

[0027] Figure 4 For the present invention Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0028] Figure 5 It is a schematic diagram of the matching structure of the auxiliary drive ring, guide block and driven block of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the support column of the present invention.

[0030] Figure 7 This is a schematic structural diagram of the guide ring block of the present invention.

[0031] 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. Throw-out outlet; 17. Limit sleeve; 18. Limit plate; 19. Support column; 20. Limit cylinder; 21. Limit ring; 22. Screw conveyor; 23. Main stirring rod; 24. Block; 25. Internal mixing barrel; 26. Sealing plate; 27. Limit ball head; 28. Second elastic member; 29. ​​First elastic member. DETAILED DESCRIPTION

[0032] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example 1

[0034] When the pulp is mixed with water, due to the poor dispersion performance of the pulp and 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.

[0035] See also Figures 1 to 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 provided on the upper surface of the outer mixing barrel 1, and a water injection port is also provided. A rotatable inner mixing barrel 25 is provided 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), the inner mixing barrel 25 is provided with a screw conveyor 22 capable of transporting the liquid at its bottom to its top, 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, so 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, and 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 that can move back and forth along their 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.

[0036] 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 the upper surface of the outer mixing barrel 1 is provided with a motor for prompting the driving roller 4 to rotate, so when the motor is working, it can prompt the driving roller 4 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, it can prompt the screw conveyor 22 to work, thereby prompting 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 prompted 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.

[0037] 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, thereby transporting the high-density mixture at the bottom of the inner mixing barrel 25 to the low-density mixture at its upper part, thereby better promoting the mixing of the materials, thereby greatly improving the mixing efficiency and easily breaking the stratification of the materials due to different densities.

[0038] Example 2

[0039] In reality, liquids have 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.

[0040] See also Figures 2 to 7 On the basis of the above embodiment, the technical solution adopted includes that the top end of the outer circumference of the screw conveyor 22 is provided with a rotatable limit cylinder 20, and multiple support columns 19 are evenly fixedly connected to the outer circumference of the limit cylinder 20, and 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 support column 19, wherein the cross section of the support column 19 is elliptical, so the sliding connecting plate 14 can only slide on the support column 19 along its axial direction and will not rotate on the support column 19, and a first elastic member 29 is provided between two adjacent sliding connecting plates 14, and one end of the support column 19 close to the limit cylinder 20 is fixedly connected to the limit plate 18, and the side of the limit plate 18 away from the limit cylinder 20 adsorbs the limit sleeve 17, and the limit sleeve 17 is slidably connected to the support column 19, and the end of the limit sleeve 17 away from the limit plate 18 is fixedly connected to the corresponding sliding connecting plate 14.

[0041] The limiting sleeve 17 and the limiting plate 18 are made of magnetic materials. Therefore, when the limiting sleeve 17 is adsorbed on the limiting plate 18, it can temporarily stabilize the auxiliary stirring rod 13. A mounting port is opened in the middle of the auxiliary stirring rod 13, and the sliding connecting plate 14 is fixedly connected in the mounting port. The thickness of the sliding connecting plate 14 is less than the length of the mounting port. 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 mounting ports. 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.

[0042] Through the arrangement of 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 the slurry passes 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 vortex of the slurry due to inertia, thereby greatly improving its mixing efficiency.

[0043] Example 3

[0044] Although the provision of multiple auxiliary stirring rods 13 can improve the mixing efficiency by breaking the rotation or vortex state of the slurry due to inertia, the fibers in the papermaking slurry, especially the natural lignin and hemicellulose from wood pulp, have a certain viscosity. Therefore, when the slurry is mixed, fiber adhesion often occurs. This embodiment is specially invented to solve the above problem.

[0045] See also Figures 2 to 7 On the basis of the above embodiment, the technical solution adopted includes that the top end 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 both gathered toward the center of the axis, thereby forming Figure 2 and Figure 3 In the shape of the figure, the top end of the driving roller 4 is evenly fixedly connected with multiple auxiliary driving rods 10, one end of which is set on the guide ring block 5. Therefore, when the driving roller 4 rotates, the setting of the auxiliary driving rod 10 and the guide ring block 5 can prompt the inner mixing barrel 25 to rotate, and the auxiliary driving component is set on the auxiliary driving rod 10.

[0046] The auxiliary drive component includes an auxiliary drive ring 6 fixedly connected to the lower surface of multiple auxiliary drive rods 10, and the lower surface of each auxiliary drive rod 10 is fixedly connected to a guide block 7, and the guide block 7 and the auxiliary drive ring 6 are both on the same horizontal plane (such as Figure 5 As shown), when the auxiliary drive rod 10 rotates, the guide block 7 and the auxiliary drive ring 6 will be caused to rotate synchronously. The outer circumferences of the multiple limiting sleeves 17 are fixedly connected to the driven rod 12 with 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.

[0047] The shape of the driven block 11 is semi-cylindrical, and the inner circumference of the auxiliary drive ring 6 and the side of the driven block 11 are provided with clips that can be engaged with 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 of the guide block 7 (from the side of the guide block 7). 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 guide block 7 side, 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. The setting of the limiting ball head 27 ensures that the limiting cylinder 20 will not rotate when the driven block 11 and the guide block 7 side are from contact to separation. Only when the auxiliary drive ring 6 forcibly moves with the driven block 11 will the limiting cylinder 20 rotate. 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. 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.

[0048] A plurality of ejection outlets 16 are evenly provided on the inner circumference of the inner mixing barrel 25, and a sealing plate 26 that can cause the ejection outlet 16 to be closed 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 both four, and the positions correspond to each other, the top of the outer circumference of the screw conveyor 22 is fixedly connected to the limiting ring 21, and the limiting cylinder 20 is rotatably connected to the limiting ring 21, and a plurality of auxiliary limiting grooves are provided on the upper and lower surfaces of the limiting ring 21, and a limiting ball head 27 with one end that can be clamped on 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 with one end arranged on the inner wall of the auxiliary limiting groove, wherein the 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.

[0049] 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 on the guide ring block 5, and the bottom end of the auxiliary stirring rod 13 can abut on 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 assembled.

[0050] By setting the auxiliary driving ring 6 and the guide block 7, the auxiliary stirring rods 13 on a support column 19 can be forced 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 slurry ejected from multiple new spaces will be intertwined. Together, thus forming a counter-attack phenomenon, it is possible to effectively impact the adhering fibers and greatly increase the mixing effect. 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 (the throwing outlet 16 at this time is not blocked by the sealing plate 26), thereby effectively reducing the occurrence of limited adhesion. 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 into the inner mixing barrel 25.

[0051] Example 4

[0052] Based on 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:

[0053] S1. Pour the coarse slurry, fine slurry and water into the mixing barrel 25 in proportion;

[0054] S2. Start the motor to stir the mixture;

[0055] S3. Turn off the motor and remove the mixed material; when the personnel remove the material, the mixed material is discharged through the liquid outlet pipe;

[0056] S4. Filter the mixed material to obtain a slurry.

[0057] To sum up, 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.

[0058] 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, thereby ensuring that the next combination can be completed normally.

[0059] After the slurry mixing is completed, personnel can discharge the liquid in the inner mixing barrel 25 through the liquid outlet pipe set 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.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for mixing coarse and fine pulp for papermaking, comprising an external mixing barrel, characterized in that: The outer mixing barrel is provided with a rotatable inner mixing barrel, the inner mixing barrel is provided with a screw conveyor capable of conveying liquid from the bottom thereof to the top thereof, a plurality of main stirring rods are provided at the bottom of the outer circumference of the screw conveyor, a plurality of horizontally rotatable support columns are evenly provided at the top of the screw conveyor, and a plurality of auxiliary stirring rods capable of moving back and forth along the axial direction thereof are provided on the support columns, and an auxiliary driving component for driving the auxiliary stirring rods to move is provided at the top of the inner circumference of the inner mixing barrel; The top end of the outer circumference of the screw conveyor is provided with a rotatable limiting cylinder, and the multiple support columns are evenly fixedly connected to the outer circumference of the limiting cylinder, and the middle part of the auxiliary stirring rod is provided with a sliding connecting plate, and the sliding connecting plate is slidably connected to the support column, and a first elastic member is provided between two adjacent sliding connecting plates, and one end of the support 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 adsorbs the limiting sleeve, and the limiting sleeve is slidably connected to the support column, and the end of the limiting sleeve away from the limiting plate is fixedly connected to the sliding connecting plate corresponding thereto; 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 the upper surface of the outer mixing barrel is provided with a motor for causing the driving roller to rotate; A guide ring block is fixedly connected to the top of the inner circumference of the inner mixing barrel, and the inner ends of the upper and lower ring surfaces of the guide ring block are both converged toward the center of the axis thereof. A plurality of auxiliary driving rods are evenly fixedly connected to the top of the driving roller, one end of each of which is arranged on the guide ring block, and the auxiliary driving component is arranged on the auxiliary driving rods; The auxiliary drive component includes an auxiliary drive ring fixedly connected to the lower surface of a plurality of auxiliary drive rods, the lower surface of each auxiliary drive rod is fixedly connected to a guide block, the guide block and the auxiliary drive ring are in the same horizontal plane, the outer circumference of the plurality of limiting sleeves are fixedly connected to a driven rod with one end extending between the auxiliary drive ring and the guide block, and the top end of the driven rod is fixedly connected to the driven block; The driven block is semi-cylindrical in shape, and the inner circumference of the auxiliary drive ring and the side surface of the driven block are both provided with clips that can be clipped to each other; The top of the outer peripheral surface of the screw conveyor is fixedly connected to a limiting ring, and the limiting cylinder is rotatably connected to the limiting ring; A plurality of auxiliary limiting grooves are provided on both the upper and lower surfaces of the limiting ring, wherein a limiting ball head having one end capable of being clamped on the limiting cylinder is slidably connected in the auxiliary limiting groove, and an 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; When the driving roller rotates one circle, the auxiliary stirring rod on the support column will be combined and separated four times. Each combination is completed by the movement of the driven rod, and each separation is completed by the first elastic member. At the same time, each time the auxiliary stirring rod is separated, it will be restored to its original position through the setting of the limiting sleeve and the limiting plate.

2. The coarse and fine pulp mixing device for papermaking according to claim 1, characterized in that: The bottom end of the driving roller is fixedly connected to the auger of the 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. The top end of the inner mixing barrel is rotatably connected to the inner top surface of the outer mixing barrel.

3. The coarse and fine pulp mixing device for papermaking according to claim 2, characterized in that: 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.

4. The coarse and fine pulp mixing device for papermaking according to claim 1, characterized in that: A plurality of ejection outlets are evenly opened on the inner circumference of the inner mixing barrel, and a sealing plate capable of closing the ejection outlets is fixedly connected to the auxiliary stirring rod farthest from the screw conveyor.

5. The coarse and fine pulp mixing device for papermaking according to claim 4, characterized in that: A clamping groove is provided on the side of the auxiliary stirring rod close to the screw conveyor, and a plurality of clamping blocks adapted to the clamping groove are provided on the side of the auxiliary stirring rod away from the screw conveyor.

6. A method for using a coarse and fine pulp mixing device for papermaking, wherein the method comprises using the coarse and fine pulp mixing device for papermaking according to any one of claims 1 to 5 to mix pulp, wherein: The following steps are involved: S1. Pour coarse slurry, fine slurry and water into the 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 a slurry.

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