Preparation device and preparation process of low-viscosity polyanionic cellulose

Abstract

The invention relates to the technical field of cellulose processing, in particular to a low-viscosity polyanionic cellulose preparation device and a preparation process thereof.The low-viscosity polyanionic cellulose preparation device comprises multiple rows of rake rods, a rake shaft, two discharging plates and a reaction tank fixedly installed on a frame. The end part of the rake rod can be in contact with the inner wall of the reaction tank, so that the phenomenon of bottom pasting is avoided. And after drying is completed, the discharging plate is pushed, so that the dried cellulose is discharged. The edge of the discharging plate cannot be penetrated, the whole discharging plate can be pushed, and when the rake rod moves, the rake rod rotates along the rotating column through the inclined groove, so that the end of the rake rod rotates to be parallel to the axis of the rake shaft, the situation that the end of the rake rod is too long, and consequently an avoiding hole is formed to be large is avoided, and the residual quantity generated when the fiber bundles are pushed for the first time is reduced; and the dried cellulose can be conveniently discharged. And the discharge plate is pushed in the manner, so that the number of the rake rods is not limited, and the length of the reaction tank can be freely controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of cellulose processing, and particularly to a preparation device for low-viscosity polyanionic cellulose. Background Art

[0002] The production of carboxymethyl cellulose and polyanionic cellulose both requires the use of a vacuum rake dryer for drying. Chinese Patent Application No.: CN202210024802.0, a discharging device for a rake dryer for carboxymethyl cellulose polyanionic cellulose discloses the structure of a vacuum rake dryer used when drying cellulose. However, after drying, it is difficult to discharge the cellulose, and how to be able to push out the cellulose is a problem that needs to be solved in this field.

[0003] In order to solve the problem of pushing out the material, Chinese Patent Application No.: CN202411448266.2, a rake vacuum dryer, discloses that a power source one drives a pushing plate and a rake rod to move along the rake rod towards the discharge port. By setting the pushing plate and making the stirring rake slide on the rake rod, when the material remains on both sides of the discharge port, the power source one drives the pushing plate and the rake rod to move towards the middle, so as to ensure the sealing inside the drying inner tank while moving the material into the discharge port and prevent the material from accumulating too much. The cellulose is extruded by means of air pressure, but the number of rake rods on it is limited because the final extrusion stacking thickness is limited, and the rake rods do not contact the inner wall of the reaction tank, and the reaction tank will generate more heat, and caking at the bottom will occur after long-term operation.

[0004] Therefore, a preparation device for low-viscosity polyanionic cellulose and its preparation process are needed, which can facilitate the discharge of the dried cellulose, and the rake rods contact the inner wall of the reaction tank to avoid caking at the bottom, and the number of rake rods is not limited, so that the length of the reaction tank can be freely controlled. Summary of the Invention

[0005] Aiming at the above-mentioned existing technical deficiencies, the purpose of the present invention is to provide a preparation device for low-viscosity polyanionic cellulose and its preparation process, which can facilitate the discharge of the dried cellulose, and the rake rods contact the inner wall of the reaction tank to avoid caking at the bottom, and the number of rake rods is not limited, so that the length of the reaction tank can be freely controlled.

[0006] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a preparation device for low-viscosity polyanionic cellulose, which includes multiple rows of rake rods, a rake shaft, two discharge plates, and a reaction tank fixedly installed on a frame. A plurality of rake rods are fixedly installed on the outer edge of the rake shaft. The rake shaft is rotatably installed in the reaction tank. A rotary driver for driving the rotation of the rake shaft is fixedly arranged on the outer side of the reaction tank. The two discharge plates are respectively located on both inner sides of the reaction tank. Each discharge plate is provided with a plurality of avoidance holes for the horizontal passage of multiple rows of rake rods. A material passing hole is arranged between two adjacent avoidance holes. A linear pusher for pushing the two discharge plates to move inward is arranged on the reaction tank.

[0007] Preferably, an inner pulling mechanism for pulling multiple rows of rake rods to move inward synchronously and a rotating mechanism for driving the ends of multiple rows of rake rods to rotate to be parallel to the axis of the rake shaft are fixedly arranged inside the rake shaft.

[0008] Preferably, the inner pulling mechanism includes a linear pushing mechanism and a plurality of inner pulling units. The plurality of inner pulling units respectively correspond to two rake rods. Each inner pulling unit includes a pull rod, a guide sleeve, a linear pushing mechanism, a hinge rod, and a rotating sleeve. The guide sleeves on the plurality of inner pulling units are fixedly connected to each other. The guide sleeves at the head and tail ends are fixedly connected to the rake shaft. The pull rods on the plurality of inner pulling units are fixedly connected to each other. The outer edge of the pull rod fits with the inner edge of the guide sleeve. The pull rod at the end is rotatably connected to the driving end of the linear pushing mechanism. A conduit one for the sliding connection of the rake rod is arranged on the outer edge of the guide sleeve. A ring groove for the insertion of the conduit one is arranged at the bottom of the rake rod. An insertion post one is formed between the rake rod and the ring groove. The bottom of the insertion post one is rotatably connected to the rotating sleeve. One end of the hinge rod is hinged to the rotating sleeve, and the other end of the hinge rod is hinged to the pull rod. An avoidance sliding groove for the sliding of the hinge rod is arranged at the connection between the conduit one and the guide sleeve.

[0009] Preferably, the rotating mechanism includes a rotating column and an inclined groove. Two rotating columns are fixedly arranged on the outer edge of the conduit one. An inclined groove for the sliding of the rotating column is arranged on the outer edge of the rake rod.

[0010] Preferably, the linear pushing mechanism includes a rotating shaft, a connecting plate, and two electric push rods. The two electric push rods are fixedly installed on the outer edge of the reaction tank. The connecting plate is fixedly installed at the ends of the two electric push rods. One end of the rotating shaft is rotatably connected to the connecting plate.

[0011] Preferably, the linear pusher includes two rows of push rods. The reaction tank is provided with guide holes for the passage of the push rods. Before the discharge plate is pushed, the discharge plate tightly covers the guide holes. A strong magnet is fixedly arranged in the area where the discharge plate contacts the push rod.

[0012] Preferably, two insertion posts two and two conduits two are fixedly arranged on each discharge plate. The outer edges of the two conduits two clamp the outer edge of one or more rake rods. The insertion post two on one discharge plate is inserted into the conduit two on the other discharge plate.

[0013] Preferably, limiting bars are fixedly arranged on the outer edges of the rake bars near the two discharge plates. The lengths of the two limiting bars are parallel to the ends of the rake bars, and the ends of the limiting bars are arc-shaped. The ends of the limiting bars are in contact with the discharge plates.

[0014] Preferably, guide bars are fixedly arranged on the outer edge of the rake shaft, and clamping grooves for clamping the guide bars are formed on the inner edge of the discharge plate.

[0015] A preparation process of a preparation device for low-viscosity polyanionic cellulose is characterized in that: Step 1: Add cellulose into the reaction tank and then dry it. Step 2: After drying, the linear pushing mechanism pushes. The linear pushing mechanism will push multiple pull rods to move horizontally. The articulated rod will pull the rake bar to contract inward. While the rake bar is moving, the rake bar will rotate along the rotating column through the inclined groove, so that the end of the rake bar rotates to be parallel to the axis of the rake shaft. Step 3: Insert the linear pusher into the reaction tank, and push the discharge plate to slide horizontally through the linear pusher, and push the cellulose out along the discharge port of the reaction tank. Step 4: Pull out all the linear pushers, the rotary drive drives the rake shaft to rotate by a certain degree, the material passing hole rotates to directly below the rake shaft, insert the linear pusher, and make the end of the linear pusher attracted by the strong magnet, and then pull the discharge plate back to its original position through the linear pusher. Step 4: The rotary drive drives the rake shaft to rotate by a certain degree again, so that the material passing hole is located directly above the rake shaft. Step 5: Repeat the content of Step 3 - Step 5 multiple times until all the cellulose in the reaction tank is pushed out.

[0016] The beneficial effects of the present invention are as follows: For the preparation device of low-viscosity polyanionic cellulose, during drying, the end of the rake bar can contact the inner wall of the reaction tank to avoid the phenomenon of bottom sticking. After drying is completed, the dried cellulose is discharged by pushing the discharge plate. Before the discharge plate is pushed, the linear pushing mechanism pushes. The linear pushing mechanism will push multiple pull rods to move horizontally. The articulated rod will pull the rake bar to contract inward, so that the edge of the discharge plate will not be penetrated, and the entire discharge plate can be pushed. While the rake bar is moving, the rake bar will rotate along the rotating column through the inclined groove, so that the end of the rake bar rotates to be parallel to the axis of the rake shaft, avoiding the need to open a large avoidance hole due to the too long end of the rake bar, reducing the residual amount when pushing the fiber bundle for the first time, and facilitating the discharge of the dried cellulose. And by pushing the discharge plate in this way, the number of rake bars is not limited, and the length of the reaction tank can be freely controlled. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0019] Figure 2 It is a sectional view of the present invention.

[0020] Figure 3 It is a three-dimensional structure diagram of the present invention with the reaction tank removed.

[0021] Figure 4 It is a schematic diagram of the connection state between the rake rod and the rake shaft.

[0022] Figure 5 It is a partial sectional view of the rake rod and the rake shaft.

[0023] Figure 6 It is a three-dimensional structure diagram of the inner pulling mechanism and the rotating mechanism.

[0024] Figure 7 It is a three-dimensional structure diagram of the linear pushing mechanism.

[0025] Figure 8 It is a three-dimensional structure diagram of the guide sleeve.

[0026] Figure 9 It is a three-dimensional structure diagram of the present invention after installing the linear pusher.

[0027] Figure 10 It is a three-dimensional structure diagram of the discharge plate.

[0028] Figure 11 It is a three-dimensional structure diagram of the contact state between the discharge plate and the limit stop bar.

[0029] Figure 12 It is a partial three-dimensional structure diagram of the contact state between the discharge plate and the rake shaft.

[0030] Description of the reference numerals: 1, reaction tank; 2, rake rod; 2a, first insertion post; 3, rake shaft; 4, discharge plate; 4a, avoidance hole; 4b, material passing hole; 4c, second insertion post; 4d, second conduit; 4e, card slot; 4f, guide bar; 5, linear pusher; 5a, strong magnet; 6, inner pulling mechanism; 6a, pull rod; 6b, guide sleeve; 6b1, first conduit; 6c, linear pushing mechanism; 6c1, rotating shaft; 6c2, connecting plate; 6c3, electric push rod; 6d, articulated rod; 6e, rotating sleeve; 7, rotating mechanism; 7a, rotating post; 7b, inclined slot; 8, limiting stop bar. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment: The present invention provides a preparation device for low-viscosity polyanionic cellulose. As Figures 1-3 shown, it includes multiple rows of rake rods 2, a rake shaft 3, two discharge plates 4, and a reaction tank 1 fixedly installed on a frame. Multiple rake rods 2 are fixedly installed on the outer edge of the rake shaft 3. The rake shaft 3 is rotatably installed in the reaction tank 1. A rotating driver for driving the rotation of the rake shaft 3 is fixedly arranged on the outside of the reaction tank 1. The two discharge plates 4 are respectively located on both sides inside the reaction tank 1. Each discharge plate 4 is provided with a plurality of avoidance holes 4a for the multiple rows of rake rods 2 to pass through horizontally. A material passing hole 4b is arranged between two adjacent avoidance holes 4a. A linear pusher 5 for pushing the two discharge plates 4 to move inward is arranged on the reaction tank 1. Add low-viscosity polyanionic cellulose (hereinafter all described as cellulose) into the reaction tank 1, and then perform drying. After drying, the cellulose needs to be discharged along the discharge port. The linear pusher 5 is used to drive the two discharge plates 4 to move inward, so that the two discharge plates 4 move horizontally. During the movement, due to the function of the avoidance holes 4a, the discharge plates 4 can avoid the rake rods 2, and the cellulose at the edge can be pushed towards the middle. The cellulose will be discharged along the discharge port in the middle of the reaction tank 1.

[0033] However, due to the effect of the avoidance hole 4a, when the cellulose is extruded, the cellulose hidden behind the rake rod 2 will not be squeezed out, resulting in residue. It should be explained that the cellulose behind the rake rod 2 will slide down along the inner edge of the reaction tank 1 to the bottom of the inner edge of the reaction tank 1. If the discharge plate 4 is directly pulled back to reset at this time, the cellulose will be taken away by the reset discharge plate 4. This means that even if the discharge plate 4 is pushed forward again, the cellulose cannot be squeezed out. In order to solve this problem, the reaction tank 1 is rotated so that the feed hole 4b originally located directly above the rake shaft 3 is rotated to directly below the rake shaft 3. When the discharge plate 4 is reset backward, the cellulose located at the bottom of the inner edge of the reaction tank 1 will be avoided. When the discharge plate 4 is pushed forward again, the discharge plate 4 will take the cellulose located at the bottom of the inner edge of the reaction tank 1.

[0034] Since the inner wall of the reaction tank 1 is mainly used for heating, the end of the rake rod 2 needs to contact the inner edge of the reaction tank 1, so that the fiber bundle in contact with the inner wall of the reaction tank 1 can be brought up, but this requires the avoidance hole 4a to be penetrated, so that the discharge plate 4 is divided into multiple parts. In order to solve this problem, when discharging cellulose, multiple rake rods 2 need to be retracted inward to avoid the avoidance hole 4a from penetrating the discharge plate 4. At the same time, the length of the side of the rake rod 2 away from the rake shaft 3 needs to be lengthened as needed, and the end of the rake rod 2 is inclined and not parallel to the axis of the rake shaft 3. Therefore, when discharging cellulose, the end of the rake rod 2 needs to be rotated to be parallel to the axis of the rake shaft 3 to avoid the width of the avoidance hole 4a being too large, resulting in a large amount of residual cellulose. For this reason, the rake shaft 3 is fixedly provided with an inner pulling mechanism 6 that pulls multiple rows of rake rods 2 to move inward synchronously and a rotating mechanism 7 that drives the ends of multiple rows of rake rods 2 to rotate to be parallel to the axis of the rake shaft 3. The multiple rows of rake rods 2 are pulled inward by the inner pulling mechanism 6 to avoid the avoidance holes 4a from penetrating the discharge plate 4. At the same time, the multiple rows of rake rods 2 are driven to rotate by the rotating mechanism 7, so that the ends of the rake rods 2 are parallel to the axis of the rake shaft 3.

[0035] Due to the high temperature environment of the reaction tank 1 and the limited internal space of the rake shaft 3, it is difficult to install more structures on the inner pulling mechanism 6 and the rotating mechanism 7 to rotate and pull. Figure 5As shown in the figure, the inner pulling mechanism 6 includes a linear pushing mechanism 6c and multiple inner pulling units. The multiple inner pulling units respectively correspond to two rake rods 2. Each inner pulling unit includes a pull rod 6a, a guide sleeve 6b, a linear pushing mechanism 6c, a hinge rod 6d, and a rotating sleeve 6e. The guide sleeves 6b on the multiple inner pulling units are fixedly connected to each other. The guide sleeves 6b at both ends are fixedly connected to the rake shaft 3. When the rake shaft 3 rotates, it will drive the guide sleeve 6b to rotate together. The pull rods 6a on the multiple inner pulling units are fixedly connected to each other. The outer edge of the pull rod 6a fits with the inner edge of the guide sleeve 6b. The pull rod 6a at the end is rotatably connected to the driving end of the linear pushing mechanism 6c. By pulling through the linear pushing mechanism 6c, the linear pushing mechanism 6c can push the multiple pull rods 6a to slide along the inside of the linear pushing mechanism 6c. When the rake shaft 3 rotates, it will simultaneously be able to pull the pull rod 6a to rotate. A first conduit 6b1 for the sliding connection of the rake rod 2 is provided on the outer edge of the guide sleeve 6b. A ring groove for the insertion of the first conduit 6b1 is opened at the bottom of the rake rod 2. An insertion post 2a is formed between the rake rod 2 and the ring groove. The bottom of the insertion post 2a is rotatably connected to the rotating sleeve 6e. One end of the hinge rod 6d is hinged to the rotating sleeve 6e, and the other end of the hinge rod 6d is hinged to the pull rod 6a, as Figure 8 shown, an avoidance sliding groove for the sliding of the hinge rod 6d is opened at the connection between the first conduit 6b1 and the guide sleeve 6b. When it is necessary to retract multiple rake rods 2 inward, by pushing through the linear pushing mechanism 6c, the linear pushing mechanism 6c can push the guide sleeve 6b to slide inward. When the pull rod 6a moves, it will pull the hinge rod 6d to move, so that the hinge rod 6d can pull the rotating sleeve 6e to move downward, that is, the rotating sleeve 6e pulls the rake rod 2 to retract inward, so that the avoidance hole 4a does not need to penetrate the discharge plate 4. And this structure is simple, occupies a small area, and does not need to set up electrical structures inside, and can adapt to high-temperature environments.

[0036] As Figure 6 shown, the rotating mechanism 7 includes a rotating column 7a and an inclined groove 7b. Two rotating columns 7a are fixedly provided on the outer edge of the first conduit 6b1. An inclined groove 7b for the sliding of the rotating column 7a is opened on the outer edge of the rake rod 2. When the rotating sleeve 6e pulls inward, the rotating sleeve 6e will pull the rake rod 2 to move inward. And the rotating sleeve 6e is rotatably connected to the insertion post 2a, so that the inclined groove 7b will slide along the limiting action of the rotating column 7a, that is, drive the rake rod 2 to rotate. So that the end axis of the rake rod 2 can be parallel to the axis of the rake shaft 3. And this structure is simple, occupies less space, can be installed inside the rake shaft 3, and is driven by working through the inner pulling mechanism 6 without electrical components, that is, it can rotate, avoiding damage caused by high-temperature environments. And through this rotation method, the rotation angle is more accurate, and the angles of multiple rake rods 2 can be the same.

[0037] As Figure 7As shown in the figure, the linear pushing mechanism 6c includes a rotating shaft 6c1, a connecting plate 6c2, and two electric push rods 6c3. The two electric push rods 6c3 are fixedly installed on the outer edge of the reaction tank 1. The connecting plate 6c2 is fixedly installed at the ends of the two electric push rods 6c3. One end of the rotating shaft 6c1 is rotatably connected to the connecting plate 6c2. By controlling the operation of the electric push rod 6c3, the electric push rod 6c3 will pull the connecting plate 6c2 to move horizontally. The connecting plate 6c2 will pull the rotating shaft 6c1 to move, that is, to drive a plurality of pull rods 6a to be pulled simultaneously. Among them, when the rake rod 2 rotates, it will drive the pull rod 6a to rotate, and the pull rod 6a can rotate relative to the connecting plate 6c2 through the rotating shaft 6c1.

[0038] In order to be able to push and pull the discharge plate 4, as Figure 9 shown, the linear pusher 5 includes two rows of push rods. Guide holes for the push rods to pass through are provided on the reaction tank 1. Before the discharge plate 4 is pushed, the discharge plate 4 covers the guide holes tightly and will not let air enter the inside of the reaction tank 1 through the guide holes. However, by pushing with the linear pusher 5, only the discharge plate 4 can be pushed inward, and the discharge plate 4 cannot be pulled back. For this reason, a strong magnet 5a is fixedly arranged in the area where the discharge plate 4 contacts the push rod, and when the discharge plate 4 rotates 180 degrees, the strong magnet 5a still remains in this horizontal position. When the discharge plate 4 needs to be reset and pulled back, the linear pusher 5 and the strong magnet 5a are attracted tightly, and then the linear pusher 5 is pulled back to drive the discharge plate 4 to be pulled back.

[0039] In order to enable the rake rod 2 to drive the discharge plate 4 to rotate when rotating, for this reason, as Figure 3 shown, two second inserting posts 4c and two second conduits 4d are fixedly arranged on each discharge plate 4. Among them, the outer edges of the two second conduits 4d are clamped on the outer edges of one or more rake rods 2. The second inserting post 4c on one discharge plate 4 is inserted into the second conduit 4d on another discharge plate 4. When the rake rod 2 rotates, the rake rod 2 will push the second conduit 4d to rotate through the rake rod 2, and then the second conduit 4d can drive the discharge plate 4 to rotate, so that the material passing hole 4b can rotate and switch positions. And during the rotation, the cellulose can be agitated through the second conduit 4d and the second inserting post 4c, making the agitation more uniform.

[0040] When the linear pusher 5 is completely withdrawn, if there is no obstruction to the discharge plate 4, it will slide along the axial direction of the rake shaft 3, causing the equipment to malfunction. However, after the linear pushing mechanism 6c pulls, the discharge plate 4 is required to slide. For this reason, as Figure 7 and Figure 11As shown in the figure, limiting bars 8 are fixedly arranged on the outer edges of the rake bars 2 near the two discharge plates 4. The lengths of the two limiting bars 8 are parallel to the ends of the rake bars 2, and the ends of the limiting bars 8 are arc-shaped. The ends of the limiting bars 8 are in contact with the discharge plates 4. When the rake bars 2 are in the initial inclined state, the limiting bars 8 can resist and lock the discharge plates 4, so that the discharge plates 4 cannot slide. After the rake bars 2 rotate, the rake bars 2 will drive the limiting bars 8 to rotate, and the limiting bars 8 are parallel to the ends of the rake bars 2, which enables the avoidance holes 4a to also pass through the limiting bars 8 without obstruction. And the ends of the limiting bars 8 are arc-shaped, so that when the limiting bars 8 rotate along with the rake bars 2, there will be no rigid collision between the limiting bars 8 and the discharge plates 4.

[0041] As Figure 12 shown, guide bars 4f are fixedly arranged on the outer edges of the rake shafts 3, and clamping grooves 4e for clamping the guide bars 4f are formed on the inner edges of the discharge plates 4. Through the action of the guide bars 4f and the clamping grooves 4e, the sliding of the discharge plates 4 can be smoother.

[0042] A preparation process of a preparation device for low-viscosity polyanionic cellulose is characterized in that: Step 1: Add cellulose into the reaction tank 1, and then carry out drying; Step 2: After drying, the linear pushing mechanism 6c pushes, and the linear pushing mechanism 6c will push a plurality of pull rods 6a to move horizontally. The articulated rod 6d will pull the rake bar 2 to contract inward. While the rake bar 2 is moving, the rake bar 2 will rotate along the rotating column 7a through the inclined groove 7b, so that the end of the rake bar 2 rotates to be parallel to the axis of the rake shaft 3; Step 3: Insert the linear pusher 5 into the reaction tank 1, and push the discharge plate 4 to slide horizontally through the linear pusher 5 to push the cellulose out along the discharge port of the reaction tank 1; Step 4: Pull out all the linear pushers 5, the rotary driver drives the rake shaft 3 to rotate 180 degrees, the material passing hole 4b rotates to directly below the rake shaft 3, insert the linear pusher 5, and make the end of the linear pusher 5 attracted to the strong magnet 5a, and then pull the discharge plate 4 back to its original position through the linear pusher 5; Step 4: The rotary driver drives the rake shaft 3 to rotate 180 degrees again, so that the material passing hole 4b is located directly above the rake shaft 3; Step 5: Repeat the content of Step 3 - Step 5 multiple times until all the cellulose in the reaction tank 1 is pushed out.

[0043] For the preparation device of the low-viscosity polyanionic cellulose, during drying, the end of the rake rod 2 can contact the inner wall of the reaction tank to avoid the phenomenon of caking at the bottom. After drying is completed, it is pushed by the discharge plate 4 to discharge the dried cellulose. Before the discharge plate 4 is pushed, the linear pushing mechanism 6c pushes. The linear pushing mechanism 6c will push multiple pull rods 6a to move horizontally, and the articulated rod 6d will pull the rake rod 2 to contract inward, so that the edge of the discharge plate will not be penetrated, and the entire discharge plate 4 can be pushed. At the same time when the rake rod 2 moves, the rake rod 2 will rotate along the rotating column 7a through the inclined groove 7b, so that the end of the rake rod 2 rotates to be parallel to the axis of the rake shaft 3, avoiding the need to open a large avoidance hole 4a due to the excessive length of the end of the rake rod 2, reducing the residue amount when the fiber bundle is pushed for the first time, and facilitating the discharge of the dried cellulose. And by pushing the discharge plate 4 in this way, the number of rake rods 2 is not limited, and the length of the reaction tank 1 can be freely controlled.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A preparation device for low-viscosity polyanionic cellulose, characterized in that, It includes multiple rows of rake rods (2), a rake shaft (3), two discharge plates (4), and a reaction tank (1) fixedly installed on the frame. Multiple rake rods (2) are all fixedly installed on the outer edge of the rake shaft (3). The rake shaft (3) is rotatably installed in the reaction tank (1). A rotary driver for driving the rotation of the rake shaft (3) is fixedly arranged on the outside of the reaction tank (1). The two discharge plates (4) are respectively located on both inner sides of the reaction tank (1). Each discharge plate (4) is provided with multiple avoidance holes (4a) for the multiple rows of rake rods (2) to horizontally pass through. A material passing hole (4b) is arranged between two adjacent avoidance holes (4a). A linear pusher (5) for pushing the two discharge plates (4) to move inward is arranged on the reaction tank (1).

2. The preparation device of a low-viscosity polyanionic cellulose according to claim 1, characterized in that, An inner pulling mechanism (6) for pulling the multiple rows of rake rods (2) to move inward synchronously and a rotating mechanism (7) for driving the ends of the multiple rows of rake rods (2) to rotate to be parallel to the axis of the rake shaft (3) are fixedly arranged inside the rake shaft (3).

3. The preparation device of a low-viscosity polyanionic cellulose according to claim 2, characterized in that, The inner pulling mechanism (6) includes a linear pushing mechanism (6c) and multiple inner pulling units. The multiple inner pulling units respectively correspond to two rake rods (2). Each inner pulling unit includes a pull rod (6a), a guide sleeve (6b), a linear pushing mechanism (6c), a hinge rod (6d), and a rotating sleeve (6e). The guide sleeves (6b) on the multiple inner pulling units are fixedly connected to each other. The guide sleeves (6b) at the head and tail ends are fixedly connected to the rake shaft (3). The pull rods (6a) on the multiple inner pulling units are fixedly connected to each other. The outer edge of the pull rod (6a) fits with the inner edge of the guide sleeve (6b). The pull rod (6a) at the end is rotatably connected to the driving end of the linear pushing mechanism (6c). A first guide pipe (6b1) for the rake rod (2) to slide and connect is arranged on the outer edge of the guide sleeve (6b). A ring groove for the insertion of the first guide pipe (6b1) is arranged at the bottom of the rake rod (2). An insertion post one (2a) is formed between the rake rod (2) and the ring groove. The bottom of the insertion post one (2a) is rotatably connected to the rotating sleeve (6e). One end of the hinge rod (6d) is hinged to the rotating sleeve (6e), and the other end of the hinge rod (6d) is hinged to the pull rod (6a). An avoidance sliding groove for the hinge rod (6d) to slide is arranged at the connection between the first guide pipe (6b1) and the guide sleeve (6b).

4. The preparation device of a low-viscosity polyanionic cellulose according to claim 3, characterized in that, The rotating mechanism (7) includes a rotating column (7a) and an inclined groove (7b). Two rotating columns (7a) are fixedly arranged on the outer edge of the first guide pipe (6b1). An inclined groove (7b) for the rotating column (7a) to slide is arranged on the outer edge of the rake rod (2).

5. The preparation device of a low-viscosity polyanionic cellulose according to claim 4, characterized in that, The linear pushing mechanism (6c) includes a rotating shaft (6c1), a connecting plate (6c2), and two electric push rods (6c3). The two electric push rods (6c3) are fixedly installed on the outer edge of the reaction tank (1). The connecting plate (6c2) is fixedly installed at the ends of the two electric push rods (6c3). One end of the rotating shaft (6c1) is rotatably connected to the connecting plate (6c2).

6. The preparation device of a low-viscosity polyanionic cellulose according to claim 5, characterized in that, The linear pusher (5) includes two rows of push rods. The reaction tank (1) is provided with guide holes for the push rods to pass through. Before the discharge plate (4) is pushed, the discharge plate (4) tightly covers the guide holes. A strong magnet (5a) is fixedly arranged in the area where the discharge plate (4) contacts the push rod.

7. The preparation device of a low-viscosity polyanionic cellulose according to claim 6, characterized in that, On each discharge plate (4), two second inserting posts (4c) and two second conduits (4d) are fixedly arranged. The outer edges of the two second conduits (4d) are clamped on the outer edges of one or more rake rods (2). The second inserting post (4c) on one discharge plate (4) is inserted into the second conduit (4d) on the other discharge plate (4).

8. The preparation device of a low-viscosity polyanionic cellulose according to claim 6, characterized in that On the outer edges of the rake rods (2) close to the two discharge plates (4), limiting bars (8) are fixedly arranged. The lengths of the two limiting bars (8) are parallel to the ends of the rake rods (2), and the ends of the limiting bars (8) are arc-shaped. The ends of the limiting bars (8) are in contact with the discharge plates (4).

9. The preparation device of a low-viscosity polyanionic cellulose according to claim 6, characterized in that, On the outer edge of the rake shaft (3), a guide bar (4f) is fixedly arranged. On the inner edge of the discharge plate (4), a clamping groove (4e) for clamping with the guide bar (4f) is formed.

10. The preparation process of the preparation device for a low-viscosity polyanionic cellulose according to claim 6, characterized in that: Step 1: Add cellulose into the reaction tank (1), and then perform drying. Step 2: After drying, the linear pushing mechanism (6c) pushes. The linear pushing mechanism (6c) will push multiple pull rods (6a) to move horizontally. The articulated rod (6d) will pull the rake rod (2) to contract inward. While the rake rod (2) is moving, the rake rod (2) will rotate along the rotating column (7a) through the inclined slot (7b), so that the end of the rake rod (2) rotates to be parallel to the axis of the rake shaft (3). Step 3: Insert the linear pusher (5) into the reaction tank (1), and push the discharge plate (4) to slide horizontally through the linear pusher (5), and push the cellulose out along the discharge port of the reaction tank (1). Step 4: Completely withdraw the linear pusher (5), the rotary driver drives the rake shaft (3) to rotate 180 degrees, the material passing hole (4b) rotates to directly below the rake shaft (3), insert the linear pusher (5), and make the end of the linear pusher (5) attracted to the strong magnet (5a), and then pull the discharge plate (4) to reset through the linear pusher (5). Step 4: The rotary driver drives the rake shaft (3) to rotate 180 degrees again, so that the material passing hole (4b) is located directly above the rake shaft (3). Step 5: Repeat the content of Step 3 - Step 5 multiple times until all the cellulose in the reaction tank (1) is pushed out.

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