Coagulating bath temperature control equipment for wet spinning carbon fiber precursor production line

Abstract

The invention discloses wet spinning carbon fiber precursor production line coagulating bath temperature control equipment which comprises a shell, a solid bath groove is formed in the upper end of the shell, a plurality of supporting frames are installed at the lower end of the shell, and a heat exchange cavity is formed in the shell; the temperature control mechanism comprises hollow plates which are symmetrically and fixedly connected to the inner walls of the two sides of the solid bath tank, a plurality of through openings are formed in the opposite sides of the two hollow plates, a connecting cylinder is fixedly connected to the left side of the shell, a columnar groove is formed in the lower end of the connecting cylinder, a first piston block capable of sliding up and down is arranged in the columnar groove, and a second piston block capable of sliding up and down is arranged in the first piston block. The inner top space of the columnar groove communicates with the interior of the hollow plate on the left side through a second one-way pipe, and the inner top space of the columnar groove communicates with the left space of the heat exchange cavity through a first one-way pipe. In the actual use process of the coagulating bath, the overall internal temperature uniformity is relatively good under the joint cooperation of the heat exchanger, the temperature control mechanism, the gas injection mechanism and other structures.

Description

Technical Field

[0001] The invention relates to the field of carbon fiber precursor production, and in particular to a coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line. Background Art

[0002] The coagulation bath is a bath liquid that makes the spinning colloidal solution coagulate or chemically change at the same time to form fibers when manufacturing chemical fibers. In the production process of wet spinning and dry-jet wet spinning carbon fiber precursor, the coagulation bath plays a vital role. It can make the spinning solution flow undergo double diffusion, phase separation and form filaments in it, which is one of the key steps in the formation of carbon fiber precursor. The most important thing in the existing coagulation bath is temperature control, which can control the temperature of the solution in the coagulation bath. However, when the existing temperature control equipment is used, it only performs fixed heating after cooling. In this way, the actual heating uniformity is poor, resulting in uneven overall solution temperature, so how to solve this problem needs to be considered. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line. During actual use, the coagulation bath utilizes the cooperation of structures such as a heat exchanger, a temperature control mechanism and a gas injection mechanism to ensure better temperature uniformity inside the whole.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A wet-spinning carbon fiber precursor production line coagulation bath temperature control device, comprising a shell, the upper end of the shell is provided with a solid bath tank, the lower end of the shell is equipped with a plurality of support frames, and the shell is provided with a heat exchange chamber; a temperature control mechanism, the temperature control mechanism comprises hollow plates symmetrically fixedly connected to the inner walls of both sides of the solid bath tank, the opposite sides of the two hollow plates are provided with a plurality of through openings, the left side of the shell is fixedly connected with a connecting cylinder, the lower end of the connecting cylinder is provided with a columnar groove, a first piston block which can slide up and down is provided in the columnar groove, and the The inner top space is connected with the inside of the hollow plate on the left side through the second one-way tube, the inner top space of the columnar groove is connected with the left side space of the heat exchange chamber through the first one-way tube, and the right side space of the heat exchange chamber is connected with the hollow plate through a connecting tube. A heat exchanger is installed at the lower end of the shell, and a plurality of thermal conductive plates are connected to the heat exchange end of the heat exchanger, and the other ends of the plurality of thermal conductive plates extend into the inside of the heat exchange chamber; a driving mechanism, which is used to drive the first piston block to reciprocate up and down; a gas injection mechanism, which is used to improve the uniformity of temperature.

[0005] Preferably, the driving mechanism includes a reciprocating screw rotatably connected between the inner walls of the left and right sides of the solid bath tank, the left end of the reciprocating screw extends to the outside and is fixedly connected to a rotating disk, the eccentric point of the rotating disk is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to the lower end of the first piston block.

[0006] Preferably, a driving motor is installed on the right side of the shell, and the output shaft of the driving motor extends into the solid bath tank and is fixedly connected to the right end of the reciprocating screw rod.

[0007] Preferably, the gas injection mechanism includes an L-shaped connecting plate fixedly connected to the lower end of the connecting cylinder, the upper end of the horizontal part of the L-shaped connecting plate is fixedly connected to the piston cylinder, a second piston block that can slide up and down is arranged in the piston cylinder, and the second piston block is fixedly connected to the first piston block by a fixing rod.

[0008] Preferably, the inner bottom space of the piston cylinder is connected to the outside through a third one-way tube, and the inner bottom space of the piston cylinder is connected to a fourth one-way tube. A hollow bar is provided in the solid bath tank, and a plurality of air holes are provided on the inner top of the hollow bar. The other end of the fourth one-way tube extends to the inside of the hollow bar, and the fourth one-way tube is a soft tube.

[0009] Preferably, one-way valves are installed inside the first one-way tube, the second one-way tube, the third one-way tube and the fourth one-way tube.

[0010] Preferably, the one-way valve inside the first one-way tube flows in a one-way direction from the left space of the heat exchange chamber to the inner bottom space of the columnar groove, the one-way valve of the second one-way tube flows in a one-way direction from the right space of the columnar groove to the left hollow plate, the one-way valve of the third one-way tube flows from bottom to top, and the one-way valve of the fourth one-way tube flows in a one-way direction from the inner bottom space of the piston cylinder to the inside of the hollow bar.

[0011] Preferably, a guide rod is fixedly connected between the left and right inner walls of the solid bath tank, a slider is threadedly connected to the reciprocating screw rod, the guide rod passes through the slider and is slidably connected to the slider, a connecting block is fixedly connected to the lower end of the slider, the lower end of the connecting block is fixedly connected to the hollow bar, a temperature sensor is fixedly connected to the left side of the connecting block, a display assembly is installed on the front side of the shell, and the temperature sensor is electrically connected to the display assembly.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The motor drives the reciprocating screw to rotate, which in turn drives the rotating disk and the connecting rod system, so that the first piston block produces up and down reciprocating motion in the device. This motion promotes the flow of circulating liquid through the one-way pipe system, ensures the full mixing of the solution in the solid bath and the uniform temperature distribution, effectively avoids the local overheating or overcooling phenomenon that may occur in the traditional method, and improves the accuracy and stability of temperature control.

[0013] 2. The reciprocating motion of the first piston block not only promotes the circulation of the liquid, but also drives the second piston block to move up and down in the piston cylinder through the linkage mechanism, forming a one-way gas flow, further enhancing the fluidity inside the solution and making the overall temperature more uniform.

[0014] 3. If the temperature is high, the heat exchanger can be started and the circulating liquid flow can be quickly cooled down at the heat exchanger. In this way, the internal temperature can be evenly reduced and always maintained at the appropriate temperature.

[0015] In summary, the present invention achieves efficient and uniform control of the solution temperature in the solid bath tank, as well as accurate temperature monitoring and regulation, by using liquid flow in conjunction with gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line proposed by the present invention; Figure 2 for Figure 1 A magnified schematic diagram of point A; Figure 3 It is an enlarged schematic diagram of the connecting tube part; Figure 4 for Figure 1 A schematic diagram of the front structure of Figure 5 Schematic diagram of the three-dimensional structure connecting the connecting block and the hollow bar.

[0017] In the figure: 1 shell, 2 support frame, 3 bath tank, 4 mounting frame, 5 drive motor, 6 hollow plate, 7 through port, 8 connecting pipe, 9 heat exchange chamber, 10 heat exchanger, 11 temperature conductive plate, 12 first one-way pipe, 13 connecting cylinder, 14 reciprocating screw rod, 15 guide rod, 16 slider, 17 connecting block, 18 temperature sensor, 19 hollow bar, 20 columnar groove, 21 first piston block, 22 connecting rod, 23 rotating disk, 24 L-shaped connecting plate, 25 piston cylinder, 26 third one-way pipe, 27 fourth one-way pipe, 28 second piston block, 29 fixing rod, 30 display component, 31 air hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] Reference Figure 1-5 A coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line comprises a shell 1, a solid bath tank 3 is provided at the upper end of the shell 1, and the solid bath tank 3 is filled with a solid bath solution, a plurality of support frames 2 are installed at the lower end of the shell 1, and the entire shell 1 can be supported by the support frames 2, and a heat exchange chamber 9 is provided inside the shell 1; As an embodiment of the present invention, it also includes a temperature control mechanism, which includes a hollow plate 6 symmetrically fixedly connected to the inner walls of both sides of the solid bath tank 3, and a plurality of through holes 7 are provided on the opposite sides of the two hollow plates 6. A connecting tube 13 is fixedly connected to the left side of the shell 1, and a columnar groove 20 is provided at the lower end of the connecting tube 13. A first piston block 21 that can slide up and down is arranged in the columnar groove 20. The inner top space of the columnar groove 20 is connected to the inside of the hollow plate 6 on the left side through a second one-way pipe, and the inner top space of the columnar groove 20 is connected to the left side space of the heat exchange chamber 9 through a first one-way pipe 12. The right side space of the heat exchange chamber 9 is connected to the hollow plate 6 through a connecting pipe 8. A heat exchanger 10 is installed at the lower end of the shell 1, and a plurality of thermal conductive plates 11 are connected to the heat exchange end of the heat exchanger 10. The heat exchanger 10 here adopts a cooling type heat exchanger, which can cool the internal solution, and the other ends of the plurality of thermal conductive plates 11 extend to the inside of the heat exchange chamber 9. As an embodiment of the present invention, it also includes a driving mechanism, which is used to drive the first piston block 21 to reciprocate up and down. The driving mechanism includes a reciprocating screw 14 rotatably connected between the inner walls on the left and right sides of the solid bath tank 3. The left end of the reciprocating screw 14 extends to the outside and is fixedly connected to a rotating disk 23. The eccentric part of the rotating disk 23 is rotatably connected to a connecting rod 22. The other end of the connecting rod 22 is rotatably connected to the lower end of the first piston block 21. When the rotating disk 23 rotates, the first piston block 21 is reciprocated up and down through the connecting rod 22. A driving motor 5 is installed on the right side of the housing 1. The output shaft of the driving motor 5 extends into the solid bath tank 3 and is fixedly connected to the right end of the reciprocating screw 14. As an embodiment of the present invention, it also includes a gas injection mechanism, which is used to improve the uniformity of temperature. The gas injection mechanism includes an L-shaped connecting plate 24 fixedly connected to the lower end of the connecting cylinder 13, and the upper end of the horizontal portion of the L-shaped connecting plate 24 is fixedly connected to a piston cylinder 25. A second piston block 28 that can slide up and down is arranged in the piston cylinder 25. The second piston block 28 is fixedly connected to the first piston block 21 through a fixing rod 29. The inner bottom space of the piston cylinder 25 is connected to the outside through a third one-way tube 26. The inner bottom space of the piston cylinder 25 is connected to a fourth one-way tube 27. A hollow bar 19 is arranged in the solid bath tank 3. A plurality of air holes 31 are opened on the inner top of the hollow bar 19. The other end of the fourth one-way tube 27 extends to the inside of the hollow bar 19. The fourth one-way tube 27 is a soft tube. As an embodiment of the present invention, the first one-way tube 12, the second one-way tube, the third one-way tube 26 and the fourth one-way tube 27 are all equipped with one-way valves. The one-way valve inside the first one-way tube 12 flows from the left side space of the heat exchange chamber 9 to the inner bottom space of the columnar groove 20 in one direction, the one-way valve of the second one-way tube flows from the right side space of the columnar groove 20 to the left hollow plate 6 in one direction, the one-way valve of the third one-way tube 26 flows from bottom to top, and the one-way valve of the fourth one-way tube 27 flows from the inner bottom space of the piston cylinder 25 to the inside of the hollow bar 19 in one direction. As an embodiment of the present invention, a guide rod 15 is fixedly connected between the inner walls of the left and right sides of the solid bath tank 3, a slider 16 is threadedly connected to the reciprocating screw rod 14, the guide rod 15 passes through the slider 16, and is slidably connected to the slider 16, a connecting block 17 is fixedly connected to the lower end of the slider 16, the lower end of the connecting block 17 is fixedly connected to the hollow bar 19, a temperature sensor 18 is fixedly connected to the left side of the connecting block 17, a display component 30 is installed on the front side of the shell 1, the temperature sensor 18 is electrically connected to the display component 30, the display component 30 is composed of a display and a processor, and the data sensed by the temperature sensor 18 can be displayed on the display in the form of electrical signals.

[0021] In the present invention, when in use, the driving motor 5 is always in the starting state. After the driving motor 5 is started, it will drive the reciprocating screw 14 to rotate. The rotation of the reciprocating screw 14 will drive the rotating disk 23 to rotate. The rotation of the rotating disk 23 will make the first piston block 21 reciprocate up and down through the connecting rod 22. By using the one-way valve inside the first one-way tube 12 and the second one-way tube, a circulating liquid flow can be generated in the right space of the solid bath tank 3, the right hollow plate 6, the heat exchange chamber 9, the columnar groove 20, the right hollow plate 6 and the left space of the solid bath tank 3. The liquid flow also keeps the solution in motion, and the temperature is relatively uniform. At the same time, the up and down reciprocating motion of the first piston block 21 , through the fixed rod 29, the second piston block 28 will reciprocate up and down. The second piston block 28 reciprocates up and down, and the third one-way tube 26 and the one-way valve in the fourth one-way tube 27 will generate one-way valve gas flow in the outside, the bottom space of the piston cylinder 25, the hollow bar 19 and the internal space of the solid bath tank 3. The gas flow can further increase the fluidity of the internal liquid, so that the actual temperature uniformity is better. Since the rotation of the reciprocating screw 14 will drive the slider 16 to reciprocate left and right, the slider 16 will drive the hollow bar 19 part and the temperature sensor 18 to move, so that the accuracy of temperature detection is stronger and the temperature uniformity is excellent. If the temperature is high, the heat exchanger 10 can be started, and the circulating liquid flow can be quickly cooled down at the heat exchanger 10. In this way, the internal temperature can be evenly reduced and always maintained at a suitable temperature.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line, characterized in that: include: A shell (1), wherein a bath solidifying tank (3) is provided at the upper end of the shell (1), a plurality of support frames (2) are installed at the lower end of the shell (1), and a heat exchange chamber (9) is provided inside the shell (1); The temperature control mechanism comprises a hollow plate (6) symmetrically fixedly connected to the inner walls of both sides of the solid bath tank (3), and a plurality of through holes (7) are provided on opposite sides of the two hollow plates (6). A connecting tube (13) is fixedly connected to the left side of the shell (1), and a columnar groove (20) is provided at the lower end of the connecting tube (13). A first piston block (21) that can slide up and down is arranged in the columnar groove (20), and the inner top space of the columnar groove (20) is provided by a second one-way The tube is connected to the inside of the hollow plate (6) on the left side, the inner top space of the columnar groove (20) is connected to the left space of the heat exchange cavity (9) through the first one-way tube (12), and the right space of the heat exchange cavity (9) is connected to the hollow plate (6) through the connecting tube (8), and a heat exchanger (10) is installed at the lower end of the shell (1), and the heat exchange end of the heat exchanger (10) is connected to a plurality of heat conducting plates (11), and the other ends of the plurality of heat conducting plates (11) all extend into the interior of the heat exchange cavity (9); A driving mechanism, the driving mechanism being used to drive the first piston block (21) to reciprocate up and down; A gas injection mechanism is provided, wherein the gas injection mechanism is used to improve the uniformity of temperature.

2. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 1, characterized in that: The driving mechanism comprises a reciprocating screw (14) rotatably connected between the inner walls of the left and right sides of the solid bath tank (3), the left end of the reciprocating screw (14) extending to the outside and fixedly connected to a rotating disk (23), the eccentric portion of the rotating disk (23) being rotatably connected to a connecting rod (22), the other end of the connecting rod (22) being rotatably connected to the lower end of the first piston block (21).

3. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 2, characterized in that: A drive motor (5) is installed on the right side of the housing (1), and an output shaft of the drive motor (5) extends into the solid bath tank (3) and is fixedly connected to the right end of the reciprocating screw rod (14).

4. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 2, characterized in that: The gas injection mechanism comprises an L-shaped connecting plate (24) fixedly connected to the lower end of the connecting cylinder (13); the upper end of the horizontal portion of the L-shaped connecting plate (24) is fixedly connected to a piston cylinder (25); a second piston block (28) which can slide up and down is arranged in the piston cylinder (25); the second piston block (28) is fixedly connected to the first piston block (21) via a fixing rod (29).

5. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 4, characterized in that: The inner bottom space of the piston cylinder (25) is connected to the outside through a third one-way tube (26), and the inner bottom space of the piston cylinder (25) is connected to a fourth one-way tube (27). A hollow bar (19) is arranged in the solid bath tank (3), and a plurality of air holes (31) are provided on the inner top of the hollow bar (19). The other end of the fourth one-way tube (27) extends into the interior of the hollow bar (19), and the fourth one-way tube (27) is a soft tube.

6. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 5, characterized in that: One-way valves are installed inside the first one-way tube (12), the second one-way tube, the third one-way tube (26) and the fourth one-way tube (27).

7. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 6, characterized in that: The one-way valve inside the first one-way tube (12) flows in a one-way direction from the left side space of the heat exchange chamber (9) to the inner bottom space of the columnar groove (20); the one-way valve inside the second one-way tube flows in a one-way direction from the right side space of the columnar groove (20) to the left hollow plate (6); the one-way valve inside the third one-way tube (26) flows from bottom to top; the one-way valve inside the fourth one-way tube (27) flows in a one-way direction from the inner bottom space of the piston cylinder (25) to the inside of the hollow bar (19).

8. The coagulation bath temperature control device for a wet-spinning carbon fiber precursor production line according to claim 5, characterized in that: A guide rod (15) is fixedly connected between the inner walls of the left and right sides of the solid bath tank (3); a slider (16) is threadedly connected to the reciprocating screw rod (14); the guide rod (15) passes through the slider (16) and is slidably connected to the slider (16); a connecting block (17) is fixedly connected to the lower end of the slider (16); the lower end of the connecting block (17) is fixedly connected to the hollow bar (19); a temperature sensor (18) is fixedly connected to the left side of the connecting block (17); a display assembly (30) is installed on the front side of the housing (1); and the temperature sensor (18) is electrically connected to the display assembly (30).

Images