Spinning device for preparing bacterial cellulose fibers in laboratory

Abstract

The utility model provides a spinning device for preparing bacterial cellulose fibers in a laboratory, and relates to the field of micro spinning equipment, the spinning device is a dry spraying-wet spinning device, silk guide columns are arranged in a coagulating bath tank, a silk outlet assembly is arranged above one silk guide column, and a silk collecting assembly is arranged above the other silk guide column; the silk discharging assembly comprises an injector and a driving assembly used for pushing a push rod of the injector; an outlet of the injector faces the coagulating bath and a preset distance is reserved between the outlet and the liquid level of the coagulating bath; the driving assembly comprises a supporting frame, a guide column and a push plate corresponding to an injector push rod, the push plate is slidably connected with the guide column, and a threaded rod is further arranged on the supporting frame; by means of the threaded connection between the threaded rod and the push plate and the sliding connection between the push plate and the guide column, the push plate rotates along with the motor to move downwards to push the injector to spray filaments, and the filaments sprayed out of the injector enter a coagulating bath through air, pass through the filament guide column and then are taken up by the filament take-up assembly in a winding mode so as to meet the use requirement of the dry spraying-wet spinning process.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro spinning equipment technical field, concretely relates to a spinning device for laboratory preparation of bacterial cellulose fiber. BACKGROUND

[0002] Cellulose is a three-dimensional (3D) network polymer, composed of glucose units, connected by beta-1, 4 glycosidic bonds. Each repeating glucose unit has three hydroxyl groups. Cellulose is one of the most abundant and environmentally friendly natural biological polymers, which can be divided into two categories according to its source: plant cellulose (PC) and bacterial cellulose (BC). PC is mainly obtained from cotton, wood and algae. BC is mainly obtained from various strains such as glucconacetobacter, sarcina and aerobter. Compared with PC, BC has the advantages of high purity, high strength, high crystallinity, good biocompatibility and large specific surface area, etc. Therefore, BC is widely used in the fields of medicine, food packaging, paper products, cosmetics, electronic products, etc.

[0003] At present, the academic research focuses on innovative and sustainable methods to reuse biomass residues to prepare bacterial cellulose. For example, the present applicant has applied for an invention patent with publication number 202310734777. X, which mainly uses vinegar residue to prepare bacterial cellulose. Under this technical idea, in addition to the structure of cellulose film, it will also involve the preparation of bacterial cellulose fiber in the laboratory. At present, bacterial cellulose fiber is mostly prepared by spinning process. Common spinning processes include wet spinning and dry-jet wet spinning. Among them, the spinning equipment used in the former is disclosed in the utility model patent with publication number CN 216972751 U, which is a micro wet spinning device. However, different bacterial cellulose solutions have different spinning processes, especially for some bacterial cellulose solutions that need to be extruded at high temperature. If they directly enter the coagulation bath, the strength of the regenerated bacterial cellulose fiber will be reduced due to the large temperature difference. Therefore, it is necessary to use a dry-jet wet spinning device to complete the spinning, that is, the spinning solution is first extruded through a certain air flow and then enters the coagulation bath to coagulate into a filament. In this case, the above-mentioned micro wet spinning device is not applicable.

[0004] Therefore, it is urgent to develop a spinning device for preparing bacterial cellulose fiber suitable for laboratory use to meet the needs of dry-jet wet spinning process. UTILITY MODEL CONTENT

[0005] The utility model provides a spinning device for laboratory preparation of bacterial cellulose fiber to solve the above problems in the prior art.

[0006] The utility model discloses a laboratory preparation bacterial cellulose fiber spinning device, for dry -spray -wet spinning device, it includes silk outlet subassembly, coagulation bath and silk collection subassembly, its characterized in that, coagulation bath is provided with at least two horizontal placement's guide column, one guide column's top is provided with silk outlet subassembly, another guide column's top is provided with silk collection subassembly,

[0007] The silk outlet subassembly includes a syringe above the coagulation bath liquid level, a heating assembly outside the syringe, and a drive assembly for pushing the syringe push rod, the outlet of the syringe faces the coagulation bath and leaves a preset distance with the coagulation bath liquid level; the drive assembly includes a support frame for placing the syringe, a group of guide columns fixed to the support frame, and a push plate corresponding to the syringe push rod, the push plate is slidably connected to the group of guide columns, a threaded rod parallel to the guide columns is further provided on the support frame, the threaded rod is rotatably connected to the support frame, the threaded rod penetrates through the push plate and is threadedly connected to the push plate, and a motor is connected to the threaded rod to drive the rotation of the threaded rod around its axis.

[0008] The coagulation bath is provided with a temperature control assembly, the silk sprayed by the syringe enters the coagulation bath through the air, and is wound around the guide column and then taken out of the bath by the silk collection subassembly.

[0009] Further, the syringe is detachably connected to the support frame.

[0010] Further, the side end of the support frame is provided with an arc-shaped groove, the outer side of the support frame is provided with a fixing block independent of the support frame, and a fastening bolt for fixing the fixing block and the support frame is arranged between the fixing block and the support frame.

[0011] Further, the side end of the fixing block is provided with a clamping groove corresponding to the arc-shaped groove, and the clamping groove and the arc-shaped groove form a fixed clamping position for placing the syringe.

[0012] In the technical scheme of the utility model, the guide column is fixedly connected to the side wall of the coagulation bath.

[0013] In another technical scheme of the utility model, the guide column below the silk collection subassembly is connected to the side wall of the coagulation bath through an adjusting assembly.

[0014] Further, the adjusting assembly includes a group of swing arms located at both ends of the guide column, the swing arms are of telescopic structure, the upper end of the swing arm is rotatably connected to the side wall of the coagulation bath, and the lower end of the swing arm is fixedly connected to the end of the guide column; the adjusting assembly further includes a contact plate arranged on one side of the guide column and fixed to the side wall of the coagulation bath, and the surface of the contact plate is an arc surface structure with the upper end of the swing arm as the center, and a plurality of adjusting clamping grooves matched with the guide column are arranged on the arc surface structure.

[0015] Further, the swing arm comprises a first supporting rod and a second supporting rod, one end of the first supporting rod is rotationally connected with the side wall of the coagulation bath, the second supporting rod is sleeved on the other end of the first supporting rod and can slide relative to the first supporting rod, the outer end of the second supporting rod is connected with the guide wire column, and the first supporting rod and the second supporting rod are further connected with a spring for driving the second supporting rod to slide relative to the first supporting rod so that the swing arm is elongated.

[0016] Further, the spring is sleeved outside the first supporting rod, and the two ends of the spring abut against the end of the second supporting rod and the limiting block fixed to the first supporting rod.

[0017] Further, the wire collecting assembly comprises a wire collecting roller, and the wire collecting roller is connected with a motor for driving the wire collecting roller to rotate around the axis of the wire collecting roller.

[0018] The utility model discloses the beneficial effect is:

[0019] 1. The utility model discloses a wire discharging assembly, a coagulation bath and a wire collecting assembly are arranged in sequence, especially the wire discharging assembly comprising a syringe above the coagulation bath, a heating assembly and a driving assembly, the threaded connection of the threaded rod and the push plate and the sliding connection of the push plate and the guide column are utilized, the push plate drives the syringe to spray by rotating downward with the motor, the wire sprayed by the syringe enters the coagulation bath through the air, and the wire is collected by the wire collecting assembly after passing through the guide wire column, so that the dry spraying-wet spinning process is satisfied.

[0020] 2. The utility model further discloses the connection between the syringe and the support frame, the distance between the syringe outlet and the coagulation bath can be adjusted, and the air bath time in the spinning process can be adjusted after quick fixing.

[0021] 3. The utility model further discloses the adjusting assembly, especially the connection of the first supporting rod, the second supporting rod, the spring and the abutting plate, the tension of the wire passing through the guide wire column can be adjusted, so that the diameter change of the wire roll on the wire collecting roller is adapted. DRAWINGS

[0022] Figure 1 It is the front view structural schematic diagram of one embodiment of the utility model;

[0023] Figure 2 It is Figure 1 the local enlarged structure schematic diagram;

[0024] Figure 3 It is the top view structural schematic diagram of the syringe and the support frame connection of one embodiment of the utility model;

[0025] Figure 4 It is the top view structural schematic diagram of the syringe and the support frame connection of another embodiment of the utility model;

[0026] Figure 5 is a side view structure schematic diagram of the adjusting assembly of the utility model;

[0027] Figure 6 is Figure 5 the main view structure schematic diagram of the adjusting assembly in

[0028] Figure 7 is Figure 6 the state change diagram of

[0029] In the figure: 100. the silk outlet assembly, 200. the coagulation bath tank, 300. the silk collection assembly, 301. the silk collection roller, 3010. the isolation paper, 1. the syringe, 11. the syringe push rod, 2. the heating assembly, 3. the support frame, 31. the arc-shaped groove, 32. the fixed block, 320. the clamping groove, 33. the fastening bolt, 4. the guide column, 5. the push plate, 6. the threaded rod, 61. the motor, 7. the guide column, 8. the swing arm, 81. the first supporting rod, 810. the limiting block, 82. the second supporting rod, 83. the spring, 9. the abutting plate, 91. the adjusting clamping groove, 10. the silk roll. DETAILED DESCRIPTION

[0030] The principle and features of the utility model are described below, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0031] Example 1

[0032] As shown in Figure 1 , the laboratory spinning device for preparing bacterial cellulose fibers in the embodiment is a dry spraying-wet spinning device, which comprises a silk outlet assembly 100, a coagulation bath tank 200 and a silk collection assembly 300, wherein a temperature control assembly (not shown in the figure) is arranged in the coagulation bath tank 200, the temperature control assembly is a prior art and is used to control the coagulation bath temperature in the coagulation bath tank, and will not be described here; two horizontally placed guide columns 7 are arranged in the coagulation bath tank 200, one of the guide columns 7 is provided with the silk outlet assembly 100 above, and the other guide column 7 is provided with the silk collection assembly 300 above; the silk collection assembly 300 comprises a silk collection roller 301, the axis direction of which is parallel to the direction of the guide column 7; the silk collection roller 301 is connected with a motor (not shown in the figure) for driving the silk collection roller 301 to rotate around its own axis; and the surface of the silk collection roller 301 is further provided with a detachable isolation paper 3010, which facilitates the taking down of the prepared fiber silk.

[0033] The yarn outlet assembly 100 comprises a syringe 1 above the surface of the coagulation bath, a heating assembly 2 sleeved outside the syringe 1, and a driving assembly for pushing the syringe push rod 11, the outlet of the syringe 1 is towards the coagulation bath and has a preset distance from the surface of the coagulation bath; the driving assembly comprises a support frame 3 for placing the syringe 1, a group of guide columns 4 (two vertical guide columns 4) fixed to the support frame 3, and a push plate 5 corresponding to the syringe push rod 11, the push plate 5 is slidably connected with the group of guide columns 4, and a threaded rod 6 parallel to the guide columns 4 is further arranged on the support frame 3, the threaded rod 6 is rotatably connected with the support frame 3, the threaded rod 6 penetrates through the push plate 5 and is threadedly connected with the push plate 5, and a motor 61 for driving the threaded rod 6 to rotate around the axis of the threaded rod 6 is connected with the threaded rod 6.

[0034] When spinning, the motor is used to drive the threaded rod 6 to rotate, the threaded rod 6 is threadedly connected with the push plate 5, and the push plate 5 is slidably connected with the guide columns 4, so that the push plate 5 is lowered to abut against the syringe push rod 11, and the motor continues to operate to make the push plate 5 continue to push down, and the outlet of the syringe sprays yarn. The yarn sprayed from the syringe 1 enters the coagulation bath through the air, passes through the guide columns 7, and is wound by the yarn collecting assembly 300.

[0035] Based on the above embodiment, in a preferred embodiment of the utility model, the syringe 1 is detachably connected with the support frame 3, as shown in Figures 1-4 , which can adjust the distance between the outlet of the syringe and the surface of the coagulation bath, that is, the time of dry spraying in the air bath. Specifically, as shown in Figure 2 and Figure 3 , the side end of the support frame 3 is provided with an arc-shaped groove 31, the outer side of the support frame 3 is provided with a fixing block 32 independent of the support frame 3, and a fastening bolt 33 for fixing the fixing block 32 and the support frame 3 is arranged between the fixing block 32 and the support frame 3. When the height of the syringe 1 needs to be adjusted, the fastening bolt 33 is opened, the fixing block 32 is removed, the height of the syringe 1 is adjusted up and down, the syringe 1 is clamped into the arc-shaped groove 31 after the adjustment is completed, and the syringe 1 is clamped between the fixing block 32 and the support frame 3 by using the fastening bolt 33. More preferably, the side end of the fixing block 32 is provided with a clamping groove 320 corresponding to the arc-shaped groove 31, as shown in Figure 4 , the clamping groove 320 and the arc-shaped groove 31 form a fixed clamping position for placing the syringe 1, which makes the syringe 1 more stably clamped between the fixing block 32 and the support frame 3.

[0036] In the above embodiment, the guide column 7 is fixedly connected to the side wall of the coagulation bath tank 200.

[0037] Embodiment 2

[0038] In the above embodiment, one of the guide posts is located directly below the take-up assembly 300. The guide post is fixedly connected to the coagulation bath. When the filament passes through the guide post, the tension is not adjustable. In particular, as the amount of fiber on the surface of the take-up roller 301 increases, the diameter of the filament roll 10 gradually increases. It may be necessary to adjust the tension of the guide post to make the filament better take-up on the take-up roller 301.

[0039] To further address the issue of unadjustable guide post tension, this embodiment, based on the previous embodiment, connects the guide post 7 located below the take-up assembly 300 to the side wall of the coagulation bath 200 via an adjustment assembly. Specifically, see... Figures 5-7 As shown, the adjustment assembly includes a set of swing arms 8 located at both ends of the guide wire post 7. The swing arms 8 are telescopic structures. The upper end of the swing arms 8 is rotatably connected to the side wall of the coagulation bath 200, and the lower end of the swing arms 8 is fixedly connected to the end of the guide wire post 7. The adjustment assembly also includes an abutment plate 9 located on the lower side of the guide wire post 7 and fixed to the side wall of the coagulation bath 200. The surface of the abutment plate 9 is an arc structure with the upper end of the swing arms 8 as the center. The arc structure is provided with a plurality of adjustment slots 91 that are adapted to the guide wire post 7. More specifically, the swing arm 8 includes a first support rod 81 and a second support rod 82. One end of the first support rod 81 is rotatably connected to the side wall of the coagulation bath 200. The second support rod 82 is sleeved on the other end of the first support rod 81 and can slide relative to the first support rod 81. The outer end of the second support rod 82 is connected to the guide wire post 7. A spring 83 for driving the second support rod 82 to slide relative to the first support rod 81 to extend the swing arm 8 is also connected between the first support rod 81 and the second support rod 82. The spring 83 is sleeved on the outside of the first support rod 81, and the two ends of the spring 83 abut against the end of the second support rod 82 and the limiting block 810 fixed to the first support rod 81.

[0040] Initially, the guide post 7 is located below the take-up roller 301, and at this time, the guide post 7 is engaged in one of the adjusting slots 91. The yarn travels vertically upwards after passing around the guide post to the surface of the take-up roller. As spinning progresses, the diameter of the yarn roll on the surface of the take-up roller 301 increases, and the yarn travels vertically upwards after passing around the guide post. At this time, the swing arm 8 can be adjusted to rotate around its axis relative to the side wall of the coagulation bath 200. That is, the swing arm 8 rotates around its top edge relative to the side wall of the coagulation bath 200. Figure 6 Rotate counterclockwise as shown Figure 7In the shown state, the end of the swing arm 8 generates displacement in the horizontal direction to approach the surface of the yarn roll of the collecting roller 301, so as to adjust the running direction of the yarn to be still along the vertical direction. In the specific operation, the second supporting rod 82 is pulled and the spring 83 is compressed, the end of the guide column 7 is retracted from the initial adjusting clamping groove 91 and is released from the limitation, then the swing arm 8 is rotated to the appropriate angle, the second supporting rod 82 is released, the end of the second supporting rod 82 is elongated outward under the action of the spring 83 until the two ends of the guide column 7 abut against the corresponding adjusting clamping grooves 91 to complete the re-fixing of the swing arm 8 and the guide column 7.

Claims

1. A spinning device for laboratory preparation of bacterial cellulose fibers, which is a dry-jet wet spinning device, comprising a spinning-off assembly (100), a coagulation bath tank (200) and a fiber collection assembly (300), characterized in that, At least two horizontal guide columns (7) are arranged in the coagulation bath tank (200), and an upper portion of one guide column (7) is provided with a yarn feeding assembly (100), and an upper portion of another guide column (7) is provided with a yarn collecting assembly (300); The yarn feeding assembly (100) comprises a syringe (1) arranged above the surface of the coagulation bath, a heating assembly (2) arranged outside the syringe (1), and a driving assembly for pushing a syringe push rod (11), and an outlet of the syringe (1) is directed towards the coagulation bath and is arranged at a preset distance from the surface of the coagulation bath; the driving assembly comprises a support frame (3) for accommodating the syringe (1), a group of guide columns (4) fixed to the support frame (3), and a push plate (5) corresponding to the syringe push rod (11), the push plate (5) is slidably connected to the group of guide columns (4), and a threaded rod (6) parallel to the guide columns (4) is arranged on the support frame (3), the threaded rod (6) is rotatably connected to the support frame (3), the threaded rod (6) penetrates through the push plate (5) and is threadedly connected to the push plate (5), and a motor is connected to the threaded rod (6) to drive the threaded rod (6) to rotate around its own axis. A temperature control assembly is arranged in the coagulation bath tank (200), yarns sprayed by the syringe (1) enter the coagulation bath through air, pass through the guide columns (7) respectively, and are collected by the yarn collecting assembly (300) after being taken out of the bath.

2. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 1, characterized in that, The syringe (1) is detachably connected to the support frame (3).

3. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 2, characterized in that, Arc-shaped grooves (31) are arranged at side ends of the support frame (3), and a fixing block (32) independent of the support frame (3) is arranged on the outer side of the support frame (3), and fastening bolts (33) for fixing the fixing block (32) and the support frame (3) are arranged between the fixing block (32) and the support frame (3).

4. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 3, characterized in that, A clamping groove (320) is arranged at a side end of the fixing block (32) corresponding to the arc-shaped groove (31), and the clamping groove (320) and the arc-shaped groove (31) form a fixing clamping position for accommodating the syringe (1).

5. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 1, characterized in that, The guide columns (7) are fixedly connected to side walls of the coagulation bath tank (200).

6. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 1, characterized in that, The guide columns (7) below the yarn collecting assembly (300) are connected to the side walls of the coagulation bath tank (200) through an adjusting assembly.

7. The laboratory preparation bacterial cellulose fiber spinning device according to claim 6, characterized in that, The adjusting assembly comprises a group of swing arms (8) arranged at both ends of the guide columns (7), the swing arms (8) are of telescopic structure, upper ends of the swing arms (8) are rotatably connected to the side walls of the coagulation bath tank (200), lower ends of the swing arms (8) are fixedly connected to end portions of the guide columns (7), and the adjusting assembly further comprises a contact plate (9) arranged at one side of the guide columns (7) and fixed to the side walls of the coagulation bath tank (200), and a surface of the contact plate (9) is an arc surface structure with the upper end of the swing arm (8) as a center, and a plurality of adjusting clamping grooves (91) corresponding to the guide columns (7) are arranged on the arc surface structure.

8. The laboratory preparation bacterial cellulose fiber spinning device according to claim 7, characterized in that, The swing arm (8) comprises a first supporting rod (81) and a second supporting rod (82), one end of the first supporting rod (81) is rotatably connected with the side wall of the coagulation bath (200), the second supporting rod (82) is sleeved on the other end of the first supporting rod (81) and can slide relative to the first supporting rod (81), the outer end of the second supporting rod (82) is connected with the guide wire column (7), and the first supporting rod (81) and the second supporting rod (82) are further connected with a spring (83) for driving the second supporting rod (82) to slide relative to the first supporting rod (81) so as to elongate the swing arm (8).

9. The laboratory device for spinning bacterial cellulose fibers according to claim 8, characterized in that, The spring (83) is sleeved outside the first supporting rod (81), and the two ends of the spring (83) abut against the end of the second supporting rod (82) and a limiting block (810) fixed to the first supporting rod (81).

10. The spinning device for laboratory preparation of bacterial cellulose fibers according to claim 1, characterized in that, The wire collecting assembly (300) comprises a wire collecting roller (301), and the wire collecting roller (301) is connected with a motor for driving the wire collecting roller (301) to rotate around the axis thereof.

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