Pre-oxidation treatment equipment for carbon fiber production

Abstract

The invention discloses pre-oxidation treatment equipment for carbon fiber production, which comprises a treatment shell for carbon fiber pre-oxidation treatment, and a circulating fan capable of moving by a net is arranged in the treatment shell. And a tension roller for adjusting the tension of the to-be-treated carbon fiber yarn is arranged at the position, corresponding to the to-be-treated carbon fiber yarn, in the treatment shell. Air flow in the treatment shell can be increased, it is guaranteed that the treatment temperatures of all areas in the treatment shell are the same, it is guaranteed that to-be-treated carbon fibers are evenly heated, the processing quality of the to-be-treated carbon fibers is guaranteed, circulating air can be effectively filtered through a detachable filter screen, and the treatment efficiency of the to-be-treated carbon fibers is improved. And moreover, the filter screen can be conveniently detached, cleaned or replaced, and unstable conveying caused by the tension in the conveying process of the carbon fiber yarns to be treated can be avoided, so that the processing quality of the carbon fiber yarns is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber production, and in particular to pre-oxidation treatment equipment for carbon fiber production. Background Art

[0002] Carbon fiber is a high-tech fiber material that has developed rapidly in the 1960s. Due to its high specific strength, high specific modulus, and excellent heat resistance, chemical corrosion resistance, friction resistance and other properties, in the production process of carbon fiber, the pre-oxidation of the precursor plays a connecting role. The pre-oxidation process of the precursor directly affects the yield and performance of the carbon fiber. At present, the pre-oxidation furnace is used to pre-oxidize the precursor. Its working principle is: hot air enters the furnace from the top, passes through the perforated plate installed on the upper furnace body, blows downward, and evenly passes through the tow, so that the tow undergoes a pre-oxidation reaction, and enters again from the top circulation after filtering and reheating from the circulating air outlet of the lower layer.

[0003] For example, a Chinese patent with the publication (announcement) number CN112481742A discloses a pre-oxidation furnace for carbon fiber production, including an outer jacket, a bundle of filaments, a blower and a heater. The inner top of the outer jacket is provided with an air collecting hole, the air collecting hole is connected to the blower through a duct, and the blower is connected to the heater through a duct. The invention is characterized in that: a lining tube is fixedly installed on the left side wall of the outer jacket, an oxidation furnace is fixedly connected to the right end of the lining tube and located inside the outer jacket, and support tubes are evenly fixedly connected to the inside of the oxidation furnace and located on both sides of the air collecting device. A support frame, a pressure-keeping box is fixedly installed on the right side of the oxidation furnace, a movable plate is movably installed inside the pressure-keeping box, a conical nozzle is evenly fixedly installed on the movable plate, a support tube is movably sleeved inside the conical nozzle, the left end of the support tube is movably connected to the left wall of the pressure-keeping box, the right end of the support tube is fixedly connected to the right arm of the outer sleeve, a spring is movably installed inside the pressure-keeping box, the two ends of the spring are respectively fixedly connected to the left wall of the pressure-keeping box and the left side of the movable plate, and the heater is connected to the inner cavity of the pressure-keeping box and is located on the right side of the movable plate through a conduit.

[0004] Although the above technical solution solves the corresponding technical problem, the carbon fiber pre-oxidation treatment equipment in the above technology is not convenient for adjusting the tension of the carbon fiber to be treated. Therefore, during the transportation of the carbon fiber yarn, it is easy to cause the carbon fiber yarn to break or become messy due to excessive or insufficient tension, thereby affecting the processing effect. Summary of the invention

[0005] The purpose of the present invention is to provide a pre-oxidation treatment device for carbon fiber production. First, the threaded shaft is driven to rotate by a forward and reverse motor, and the circulating fan is driven to move back and forth continuously under the action of the threads of the threaded shaft and the threaded sleeve, so that the air flow inside the processing shell can be increased, thereby ensuring that the processing temperature of each area inside the processing shell is the same, thereby ensuring the uniform heating of the carbon fiber filaments to be processed, thereby ensuring the processing quality of the carbon fiber filaments to be processed, and by setting a limiting sliding rod and a limiting sliding sleeve, the threaded sleeve is limited, thereby increasing the stability of the reciprocating movement of the circulating fan driven by the threaded sleeve; secondly, through a detachable filter net, the circulating air can be effectively filtered to prevent impurities from entering the processing shell, and the filter net can be conveniently disassembled, cleaned or replaced, thereby improving the practicality of the present invention; finally, by rotating the adjusting screw, and under the action of the threads of the adjusting screw and the threaded sleeve, the tension roller on the side of the fixed seat can be telescopically adjusted, and at the same time, by setting a telescopic spring, the tension roller can be adaptively adjusted when the tension is too large, thereby avoiding the unstable transportation caused by the tension during the transportation of the carbon fiber filaments to be processed, thereby ensuring the processing quality of the carbon fiber filaments.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include: A pre-oxidation treatment device for carbon fiber production, comprising: A processing shell for pre-oxidation treatment of carbon fiber, wherein a movable circulating fan is arranged inside the processing shell, and tension rollers for adjusting the tension of the carbon fiber filaments to be treated are arranged inside the processing shell and at positions corresponding to the carbon fiber filaments to be treated.

[0007] In the above-mentioned pre-oxidation treatment equipment for carbon fiber production, a pre-oxidation body is installed on the top of the treatment shell, and an electric heating wire is also installed on the inner wall of the treatment shell.

[0008] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein a forward and reverse motor is fixedly connected to the side of the treatment shell, a threaded shaft is fixedly connected to the output shaft of the forward and reverse motor, a threaded sleeve is threadedly connected to the threaded shaft, and the bottom of the threaded sleeve is fixedly connected to the top of the circulation fan.

[0009] In the above-mentioned pre-oxidation treatment equipment for carbon fiber production, a circulation pump is also installed on the top of the treatment shell, and the circulation pump is connected to the bottom of the side of the treatment shell through two circulation pipes.

[0010] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein a filter shell for circulating gas filtering is also installed on the circulation pipe, and a detachable filter screen is provided on the inner wall of the filter shell. A sealing end cover is fixedly installed on the side of the circulation pipe corresponding to the position of the filter screen by bolts, and a sealing ring matching the filter shell is fixedly connected to the side of the sealing end cover close to the filter shell.

[0011] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein the front of the treatment shell is fixedly connected to a fixed seat, a screw sleeve is fixedly connected to the fixed seat, an adjusting screw is threadedly connected to the screw sleeve, the end of the adjusting screw is rotatably mounted with an adjusting seat through a bearing, an elastically retractable mounting frame is provided on the side of the adjusting seat, and the tension roller is rotatably mounted on the mounting frame through a mounting shaft.

[0012] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein a telescopic sleeve is fixedly connected to the side of the adjustment seat, a telescopic spring is fixedly connected to the inner wall of the telescopic sleeve, the other end of the telescopic spring is fixedly connected to a telescopic slide rod, the telescopic slide rod is slidably connected to the telescopic sleeve, and the other end of the telescopic slide rod is fixedly connected to the side of the mounting frame.

[0013] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein guide sleeves for guiding the carbon fiber filaments to be treated are arranged on both sides of the treatment shell and corresponding to the positions of the carbon fiber filaments to be treated, and the inlet of the guide sleeve is designed to be arc-shaped, and guide rollers are arranged on the inner wall of the guide sleeve.

[0014] The above-mentioned pre-oxidation treatment equipment for carbon fiber production, wherein a limiting slide rod is fixedly connected to the inner wall of the treatment shell, a limiting slide sleeve is slidably connected to the limiting slide rod, and the side of the limiting slide sleeve close to the threaded sleeve is fixedly connected to the side of the threaded sleeve.

[0015] In the above-mentioned pre-oxidation treatment equipment for carbon fiber production, two symmetrically arranged limiting telescopic rods are fixedly connected to the side surface of the fixing seat, and the other end of the limiting telescopic rod is fixedly connected to the side surface of the adjusting seat.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention, firstly, drives the threaded shaft to rotate through the forward and reverse motors, and drives the circulating fan to move back and forth continuously under the action of the threads of the threaded shaft and the threaded sleeve, thereby increasing the air flow inside the processing shell, thereby ensuring that the processing temperatures of various areas inside the processing shell are the same, thereby ensuring the uniform heating of the carbon fiber filaments to be processed, thereby ensuring the processing quality of the carbon fiber filaments to be processed, and by setting the limiting sliding rod and the limiting sliding sleeve, the threaded sleeve is limited, thereby increasing the stability of the reciprocating movement of the circulating fan driven by the threaded sleeve; secondly, through the detachable filter net, the circulating air can be effectively filtered to prevent impurities from entering the processing shell, and the filter net can be conveniently disassembled, cleaned or replaced, thereby improving the practicality of the present invention; finally, by rotating the adjusting screw, and under the action of the threads of the adjusting screw and the threaded sleeve, the tension roller on the side of the fixed seat can be telescopically adjusted, and at the same time, by setting the telescopic spring, the tension roller can be adaptively adjusted when the tension is too large, thereby avoiding the unstable transportation caused by the tension during the transportation of the carbon fiber filaments to be processed, thereby ensuring the processing quality of the carbon fiber filaments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the structure of the pre-oxidation treatment equipment for carbon fiber production of the present invention; Figure 2 It is a structural schematic diagram of another perspective of the pre-oxidation treatment equipment for carbon fiber production of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of a pre-oxidation treatment device for carbon fiber production of the present invention; Figure 4 It is a schematic structural diagram of a threaded shaft in a pre-oxidation treatment device for carbon fiber production of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of a filter shell in the pre-oxidation treatment equipment for carbon fiber production of the present invention; Figure 6 It is a schematic structural diagram of a tension roller in a pre-oxidation treatment device for carbon fiber production of the present invention; Figure 7 It is a schematic diagram of the structure of the telescopic spring in the pre-oxidation treatment equipment for carbon fiber production of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the guide sleeve in the pre-oxidation treatment equipment for carbon fiber production of the present invention.

[0018] Description of Figure Numbers: 1. Process the shell; 101. Pre-oxidation of the body; 102. Heating wire; 103, circulation fan; 1031, forward and reverse motor; 1032, threaded shaft; 1033, threaded sleeve; 1034, limit slide rod; 1035, limit slide sleeve; 104, circulation pump; 1041, circulation pipe; 1042, filter shell; 1043, filter screen; 1044, sealing end cover; 1045, sealing ring; 2. Carbon fiber filaments to be processed; 201, guide sleeve; 2011, guide roller; 202, tension roller; 2021, fixing seat; 2022, screw sleeve; 2023, adjusting screw; 2024, adjusting seat; 2025, telescopic sleeve; 2026, mounting frame; 20241, limited telescopic rod; 20251. telescopic spring. 20252. telescopic slide rod. DETAILED DESCRIPTION

[0019] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0020] Please refer to Figures 1 to 8 As shown, an embodiment of the present invention provides a pre-oxidation treatment equipment for carbon fiber production, comprising: a treatment shell 1 for pre-oxidation treatment of carbon fiber, a circulating fan 103 that can be moved by a net is arranged inside the treatment shell 1, and a tension roller 202 for adjusting the tension of the carbon fiber filament 2 to be treated is arranged inside the treatment shell 1 and at a position corresponding to the carbon fiber filament 2 to be treated.

[0021] Please refer to Figures 1 to 8 As shown, a pre-oxidation body 101 is installed on the top of the processing shell 1, and a heating wire 102 is also installed on the inner wall of the processing shell 1.

[0022] Please refer to Figures 1 to 8 As shown, a forward and reverse motor 1031 is fixedly connected to the side of the processing shell 1, a threaded shaft 1032 is fixedly connected to the output shaft of the forward and reverse motor 1031, a threaded sleeve 1033 is threadedly connected to the threaded shaft 1032, and the bottom of the threaded sleeve 1033 is fixedly connected to the top of the circulation fan 103.

[0023] Please refer to Figures 1 to 8 As shown, a circulation pump 104 is also installed on the top of the processing shell 1, and the circulation pump 104 is connected to the bottom of the side of the processing shell 1 through two circulation pipes 1041.

[0024] Please refer to Figures 1 to 8 As shown, a filter shell 1042 for circulating gas filtering is also installed on the circulation pipe 1041, and a detachable filter screen 1043 is provided on the inner wall of the filter shell 1042. A sealing end cover 1044 is fixedly installed on the side of the circulation pipe 1041 and corresponding to the position of the filter screen 1043 by bolts, and a sealing ring 1045 matching the filter shell 1042 is fixedly connected to the side of the sealing end cover 1044 close to the filter shell 1042.

[0025] Please refer to Figures 1 to 8 As shown, a fixed seat 2021 is fixedly connected to the front of the processing shell 1, a screw sleeve 2022 is fixedly connected to the fixed seat 2021, an adjusting screw 2023 is threadedly connected to the screw sleeve 2022, an adjusting seat 2024 is rotatably mounted on the end of the adjusting screw 2023 through a bearing, an elastically retractable mounting frame 2026 is provided on the side of the adjusting seat 2024, and the tension roller 202 is rotatably mounted on the mounting frame 2026 through a mounting shaft.

[0026] Please refer to Figures 1 to 8 As shown, a telescopic sleeve 2025 is fixedly connected to the side of the adjustment seat 2024, a telescopic spring 20251 is fixedly connected to the inner wall of the telescopic sleeve 2025, the other end of the telescopic spring 20251 is fixedly connected to a telescopic slide rod 20252, the telescopic slide rod 20252 is slidably connected to the telescopic sleeve 2025, and the other end of the telescopic slide rod 20252 is fixedly connected to the side of the mounting frame 2026.

[0027] Please refer to Figures 1 to 8 As shown, guide sleeves 201 for guiding the carbon fiber filaments 2 to be processed are arranged on both sides of the processing housing 1 and at positions corresponding to the carbon fiber filaments 2 to be processed, and the inlet of the guide sleeve 201 is designed to be arc-shaped, and guide rollers 2011 are arranged on the inner wall of the guide sleeve 201; By adopting the above technical solution, the guide sleeve 201 and the guide roller 2011 are provided to guide the carbon fiber filaments 2 to be processed, thereby increasing the stability of conveying the carbon fiber filaments 2 to be processed.

[0028] Please refer to Figures 1 to 8 As shown, a limiting sliding rod 1034 is fixedly connected to the inner wall of the processing housing 1, and a limiting sliding sleeve 1035 is slidably connected to the limiting sliding rod 1034. The side of the limiting sliding sleeve 1035 close to the threaded sleeve 1033 is fixedly connected to the side of the threaded sleeve 1033; By adopting the above technical solution, the limiting sliding rod 1034 and the limiting sliding sleeve 1035 are provided to limit the threaded sleeve 1033, thereby increasing the stability of the threaded sleeve 1033 driving the circulation fan 103 to move back and forth.

[0029] Please refer to Figures 1 to 8As shown, two symmetrically arranged limiting telescopic rods 20241 are fixedly connected to the side of the fixing seat 2021, and the other end of the limiting telescopic rod 20241 is fixedly connected to the side of the adjusting seat 2024; By adopting the above technical solution, the limiting telescopic rod 20241 is provided to limit the adjustment seat 2024, thereby increasing the stability of the adjustment of the tension roller 202 driven by the adjustment seat 2024.

[0030] The working principle of the present invention is: first, the threaded shaft 1032 is driven to rotate by the forward and reverse motor 1031, and the circulating fan 103 is driven to move back and forth continuously under the action of the threads of the threaded shaft 1032 and the threaded sleeve 1033, so as to increase the air flow inside the processing shell 1, thereby ensuring that the processing temperature of each area inside the processing shell 1 is the same, thereby ensuring the uniform heating of the carbon fiber filaments 2 to be processed, thereby ensuring the processing quality of the carbon fiber filaments 2 to be processed, and by setting the limiting sliding rod 1034 and the limiting sliding sleeve 1035, the threaded sleeve 1033 is limited, thereby increasing the stability of the reciprocating movement of the circulating fan 103 driven by the threaded sleeve 1033; secondly, Through the detachable filter 1043, the circulating air can be effectively filtered to prevent impurities from entering the processing shell 1, and the filter 1043 can be conveniently disassembled, cleaned or replaced, thereby improving the practicality of the present invention; finally, by rotating the adjusting screw 2023, and under the action of the thread of the adjusting screw 2023 and the screw sleeve 2022, the tension roller 202 on the side of the fixed seat 2021 can be telescopically adjusted, and at the same time, by setting the telescopic spring 20251, the tension roller 202 can be adaptively adjusted when the tension is too large, thereby avoiding the unstable transportation caused by the tension during the transportation of the carbon fiber filament 2 to be processed, thereby ensuring the processing quality of the carbon fiber filament.

[0031] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A pre-oxidation treatment device for carbon fiber production, comprising a treatment shell (1) for pre-oxidation treatment of carbon fiber, characterized in that: A circulating fan (103) that can be moved is arranged inside the processing shell (1), and a tension roller (202) for adjusting the tension of the carbon fiber filaments (2) to be processed is arranged inside the processing shell (1) and at a position corresponding to the carbon fiber filaments (2) to be processed.

2. The pre-oxidation treatment equipment for carbon fiber production according to claim 1, characterized in that: A pre-oxidation body (101) is installed on the top of the processing shell (1), and a heating wire (102) is also installed on the inner wall of the processing shell (1).

3. A pre-oxidation treatment device for carbon fiber production according to claim 2, characterized in that: A forward and reverse motor (1031) is fixedly connected to the side of the processing housing (1); a threaded shaft (1032) is fixedly connected to the output shaft of the forward and reverse motor (1031); a threaded sleeve (1033) is threadedly connected to the threaded shaft (1032); and the bottom of the threaded sleeve (1033) is fixedly connected to the top of the circulation fan (103).

4. The pre-oxidation treatment equipment for carbon fiber production according to claim 3, characterized in that: A circulation pump (104) is also installed on the top of the processing shell (1), and the circulation pump (104) is connected to the bottom of the side of the processing shell (1) through two circulation pipes (1041).

5. The pre-oxidation treatment equipment for carbon fiber production according to claim 4, characterized in that: A filter shell (1042) for filtering circulating gas is also installed on the circulation pipe (1041); a detachable filter screen (1043) is provided on the inner wall of the filter shell (1042); a sealing end cover (1044) is fixedly installed on the side of the circulation pipe (1041) at a position corresponding to the filter screen (1043) by means of bolts; a sealing ring (1045) matching the filter shell (1042) is fixedly connected to the side of the sealing end cover (1044) close to the filter shell (1042).

6. The pre-oxidation treatment equipment for carbon fiber production according to claim 5, characterized in that: The front side of the processing shell (1) is fixedly connected to a fixing seat (2021), a threaded sleeve (2022) is fixedly connected to the fixing seat (2021), an adjusting screw (2023) is threadedly connected to the threaded sleeve (2022), an adjusting seat (2024) is rotatably mounted on the end of the adjusting screw (2023) via a bearing, an elastically retractable mounting frame (2026) is provided on the side of the adjusting seat (2024), and the tension roller (202) is rotatably mounted on the mounting frame (2026) via a mounting shaft.

7. The pre-oxidation treatment equipment for carbon fiber production according to claim 6, characterized in that: A telescopic sleeve (2025) is fixedly connected to the side of the adjustment seat (2024), a telescopic spring (20251) is fixedly connected to the inner wall of the telescopic sleeve (2025), the other end of the telescopic spring (20251) is fixedly connected to a telescopic slide rod (20252), the telescopic slide rod (20252) is slidably connected to the telescopic sleeve (2025), and the other end of the telescopic slide rod (20252) is fixedly connected to the side of the mounting frame (2026).

8. The pre-oxidation treatment equipment for carbon fiber production according to claim 7, characterized in that: Guide sleeves (201) for guiding the carbon fiber filaments (2) to be processed are arranged on both sides of the processing shell (1) and at positions corresponding to the carbon fiber filaments (2) to be processed, and the inlet of the guide sleeve (201) is designed to be arc-shaped, and guide rollers (211) are arranged on the inner wall of the guide sleeve (201).

9. A pre-oxidation treatment device for carbon fiber production according to claim 8, characterized in that: A limiting sliding rod (1034) is also fixedly connected to the inner wall of the processing shell (1), and a limiting sliding sleeve (1035) is slidably connected to the limiting sliding rod (1034), and a side of the limiting sliding sleeve (1035) close to the threaded sleeve (1033) is fixedly connected to a side surface of the threaded sleeve (1033).

10. The pre-oxidation treatment equipment for carbon fiber production according to claim 9, characterized in that: Two symmetrically arranged limiting telescopic rods (20241) are fixedly connected to the side surface of the fixing seat (2021), and the other end of the limiting telescopic rod (20241) is fixedly connected to the side surface of the adjusting seat (2024).

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