Efficient oiling device for PAN-based carbon fiber precursors

Abstract

The invention discloses a PAN-based carbon fiber precursor high-efficiency oiling device, and relates to the technical field of carbon fiber precursor production, and the technical scheme is that the PAN-based carbon fiber precursor high-efficiency oiling device comprises an oiling tank, a circulating tank, a PLC controller and an oil tank cover, a hoisting mechanism is arranged above the oiling tank cover, and an ultrasonic nebulizer, a godet group and a press roller group are arranged between the oiling tank and the oiling tank cover; the silk guide roller and the silk pressing roller are adjustably arranged, the PLC is electrically connected with the hoisting mechanism, the silk guide roller and the silk pressing roller, an oiling pipeline and a recycling pipeline are arranged between the circulating groove and the oiling groove, and temperature adjusting devices electrically connected with the PLC are arranged in the oiling groove and the circulating groove. Through timely monitoring and control of the PLC, closed-loop control over the whole oiling process is achieved, parameters are adjusted in time according to real-time data, the production efficiency is improved, and the product quality can be effectively improved through the stable oiling process and uniform oiling.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber precursor production, and more particularly to a PAN-based carbon fiber precursor high-efficiency oiling device. Background Art

[0002] In the production of polyacrylonitrile (PAN)-based carbon fiber precursor, the quality of the precursor directly determines the performance of the carbon fiber. Therefore, the production of the precursor is crucial in the entire carbon fiber production process, and the oiling process is a key link. Oiling is to evenly coat a layer of oil on the surface of the carbon fiber precursor. The main purpose is to increase the cohesion between the fibers and have antistatic ability. This can not only reduce the friction between the fibers, but also prevent the precursor from producing defects such as hair and broken wires during subsequent processing; and it can withstand high temperatures in the subsequent pre-oxidation process. With the continuous development of the carbon fiber industry, the requirements for PAN-based carbon fiber precursor oiling equipment are getting higher and higher. The equipment is required to have higher oiling efficiency, more uniform oiling effect, better stability and automation.

[0003] The common oiling equipment structure mainly includes oiling tank, oil supply system, oiling rod, drawing device and other components. During the oiling process of the precursor, the PAN-based carbon fiber precursor is pulled by the drawing device and contacts the oiling roller when passing through the oiling tank. The oiling roller coats the oiling agent in the oiling tank on the surface of the precursor to realize the oiling process. The oiling agent supply system continuously replenishes the oiling agent into the oiling tank through a metering pump to keep the liquid level of the oiling agent in the oiling tank stable. However, the rotation speed of the oiling roller is difficult to accurately control, resulting in uneven coating of the oiling agent on the surface of the precursor, and the metering accuracy of the oiling agent supply system is limited, and accurate delivery of the oiling agent cannot be achieved. At the same time, the precursor is easily impacted by the oiling agent when passing through the oiling tank, resulting in unstable tension of the precursor, affecting the oiling effect and the quality of the precursor.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a PAN-based carbon fiber precursor efficient oiling device in order to solve the above-mentioned problems.

[0006] The above technical objectives of the embodiments of the present invention are achieved through the following technical solutions: A PAN-based carbon fiber precursor efficient oiling device, comprising an oiling tank, a circulation tank and a PLC controller, an oiling tank cover is provided above the upper oiling tank, a hoisting mechanism for driving the upper oiling tank cover to rise and fall is provided above the upper oiling tank cover, an ultrasonic atomizer and a guide roller group and a pressing roller group for driving the precursor to move are provided between the upper oiling tank and the upper oiling tank cover, the guide roller group and the pressing roller group are both adjustable, the PLC controller is electrically connected to the hoisting mechanism, the guide roller group and the pressing roller group, an oiling pump connected to the ultrasonic atomizer is provided in the upper oiling tank, an oiling pipeline and a recovery pipeline are provided between the circulation tank and the upper oiling tank, a temperature regulating device electrically connected to the PLC controller is provided in the upper oiling tank and the circulation tank, a first filter is provided on the recovery pipeline, a circulation pump and a flow meter are provided on the oiling pipeline, and the oiling pipeline is fixedly connected to the circulation pump and the circulation tank with a second filter.

[0007] The present invention is further configured as follows: the wire guide roller group includes a first wire guide roller, a second wire guide roller and a third wire guide roller, the wire pressing roller group includes a first wire pressing roller, a second wire pressing roller and a third wire pressing roller, the first wire guide roller and the third wire guide roller are respectively located at the notches on both sides of the upper oil tank and the first wire guide roller and the third wire guide roller are in the same horizontal plane, the first wire pressing roller, the second wire guide roller and the second wire pressing roller are staggered, the first wire pressing roller and the second wire pressing roller are hoisted at the lower end of the upper oil tank cover, the third wire pressing roller is located directly above the third wire guide roller and the third wire pressing roller is in sliding cooperation with the upper oil tank cover.

[0008] The present invention is further configured as follows: a tension sensor and a speed controller are provided in the second wire guide roller, a first position controller is provided on the hoisting mechanism, the data input end of the PLC controller is connected to the output end of the tension sensor to transmit tension data, the data output end of the PLC controller is respectively connected to the input ends of the speed controller and the first position controller, the PLC controller calculates the tension error according to the tension data of the tension sensor and derives a control signal to the first position controller and the speed controller, the speed controller is connected to the controlled end of the second wire guide roller and its rotation speed is controlled by the control signal, the first position controller is connected to the controlled end of the hoisting mechanism and its height position is adjusted by the control signal.

[0009] The present invention is further configured as follows: a cylinder is provided on the upper oil tank cover for driving the third wire pressing roller to slide up and down, an oil film thickness sensor and a second position controller are provided on the third wire pressing roller, the data input end of the PLC controller is connected to the output end of the oil film thickness sensor to transmit the oil film thickness data, the data output end of the PLC controller is connected to the input end of the second position controller, the PLC controller calculates the required position adjustment amount according to the oil film thickness data of the oil film thickness sensor and then derives a control signal to the second position controller, the second position controller is connected to the cylinder and adjusts the height of the third wire pressing roller according to the control signal.

[0010] The present invention is further configured as follows: the temperature regulating device includes a temperature sensor, a constant temperature heating tube and a cooling tube, a first receiving valve is provided at the water inlet end of the cooling tube, the data input end of the PLC controller is connected to the output end of the temperature sensor to transmit temperature data, the data output end of the PLC controller is connected to the input end of the constant temperature heating tube and the first receiving valve, the PLC controller calculates the required position adjustment amount according to the temperature data of the temperature sensor and then derives a control signal to the constant temperature heating tube and the first receiving valve, the constant temperature heating tube is heated and heated by the control signal, and the first receiving valve is opened by the control signal to cool down.

[0011] The present invention is further configured as follows: a high shear cell crushing agitator is provided in the circulation tank, a deionized water inlet and an oil agent inlet are respectively provided on the side walls of the circulation tank, and a second receiving valve and a third receiving valve are respectively fixedly connected to the deionized water inlet and the oil agent inlet.

[0012] The present invention is further configured as follows: a concentration sensor is provided on the circulation pump, a fourth receiving valve is provided between the circulation pump and the second filter, the data input end of the PLC controller is connected to the output end of the concentration sensor to transmit concentration data, the data output end of the PLC controller is respectively connected to the input ends of the second receiving valve, the third receiving valve and the fourth receiving valve, the PLC controller calculates the concentration error according to the concentration data of the concentration sensor and derives a control signal to the second receiving valve, the third receiving valve and the fourth receiving valve, the second receiving valve controls the switch of the deionized water inlet, the third receiving valve controls the switch of the oil agent inlet, and the fourth receiving valve controls the switch of the oil supply pipeline.

[0013] The present invention is further configured as follows: the upper oil trough is located at the lower end of the third wire pressing roller and the third wire guide roller and is provided with an inclined collecting plate.

[0014] In summary, the present invention has the following beneficial effects:

[0015] By setting up an ultrasonic atomization oiling device, uniform, trace and controllable oiling of the oil agent can be achieved. By setting up a tension sensor on the second wire guide roller, the height of the first wire pressing roller and the second wire pressing roller and the speed of the second wire guide roller can be adjusted accurately through the PLC controller to adjust the tension of the raw silk tow and ensure the uniformity of oiling.

[0016] By setting up a circulation tank, setting up an oiling pipeline and a recovery pipeline between the oiling tank and the circulation tank, the oil can be recycled, the waste of the oil can be reduced, and the cost can be saved. A flow meter is set on the oiling pipeline to detect the flow of the recovered oil in real time, so as to achieve accurate delivery of the oil;

[0017] By setting up an oil inlet and a deionization inlet on the circulation tank, the oil concentration in the circulation tank can be adjusted. By detecting the temperature and concentration of the oil and adjusting it in conjunction with the PLC controller, the oil concentration and temperature distribution can be ensured to be uniform, thus ensuring the quality of the circulating oil.

[0018] Through timely monitoring and control by PLC controller, closed-loop control of the entire oiling process is achieved, parameters are adjusted in time according to real-time data, and production efficiency is improved. Through a stable oiling process and uniform oiling, product quality can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a high-efficiency oiling device for PAN-based carbon fiber precursors according to the present invention;

[0020] Figure 2 The connection relationship between the PLC controller and the tension sensor, speed controller and position controller in the present invention;

[0021] Figure 3 The connection relationship between the PLC controller, the oil film thickness sensor and the second position controller in the present invention;

[0022] Figure 4 The connection relationship between the PLC controller, the temperature sensor, the first receiving valve and the constant temperature heating pipe in the present invention;

[0023] Figure 5 This is the connection relationship between the PLC controller and the concentration sensor, the second receiving valve, the third receiving valve and the fourth receiving valve in the present invention.

[0024] Reference numerals: 1, oiling tank; 2, circulation tank; 3, oiling tank cover; 4, lifting mechanism; 5, ultrasonic atomizer; 6, oiling pump; 7, oiling pipeline; 8, recovery pipeline; 9, first filter; 10, circulation pump; 11, flow meter; 12, second filter; 13, first godet roller; 14, second godet roller; 15, third godet roller; 16, first pressing roller; 17, second pressing roller; 18, third pressing roller; 19, cylinder; 20, constant temperature heating tube ; 21. Cooling pipe; 22. First receiving valve; 23. High shear cell crushing agitator; 24. Deionized water inlet; 25. Oil inlet; 26. Second receiving valve; 27. Third receiving valve; 28. Fourth receiving valve; 29. ​​Collection plate; 30. PLC controller; 31. Tension sensor; 32. Speed ​​controller; 33. Position controller; 34. Oil film thickness sensor; 35. Second position controller; 36. Temperature sensor; 37. Concentration sensor. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In one possible embodiment, see Figure 1 As shown, a PAN-based carbon fiber precursor efficient oiling device includes an upper oil tank 1, a circulation tank 2 and a PLC controller 30. An upper oil tank cover 3 is provided above the upper oil tank 1. A hoisting mechanism 4 for driving the upper oil tank cover 1 to lift is provided above the upper oil tank cover 3. By providing the upper oil tank cover 1, it can not only prevent the oil mist from spreading over a large area and affecting other equipment, but also effectively prevent impurities or foreign matter in the air from falling into the upper oil tank 1 and causing contamination of the oil agent. An ultrasonic atomizer is provided between the upper oil tank 1 and the upper oil tank cover 1. 5 and a guide roller group and a pressing roller group for driving the original yarn to move. An oiling pump 6 connected to an ultrasonic atomizer 5 is provided in the oiling tank 1. By providing the ultrasonic atomizer 5, uniform, trace and controllable oiling of the oil agent can be achieved, thereby improving the uniformity of the oiling. The guide roller group and the pressing roller group can be adjusted. The PLC controller 30 is electrically connected to the hoisting mechanism 4, the guide roller group and the pressing roller group. The speed of the guide roller group and the height of the pressing roller group can be adjusted through PLC control, thereby adjusting the tension of the original yarn bundle.

[0027] For details, please refer to Figure 1As shown, the godet roller group includes a first godet roller 13, a second godet roller 14 and a third godet roller 15, and the pressing roller group includes a first pressing roller 16, a second pressing roller 17 and a third pressing roller 18. The first godet roller 13 and the third godet roller 15 are respectively located at the notches on both sides of the upper oil tank 1 and the first godet roller 13 and the third godet roller 15 are in the same horizontal plane. The first pressing roller 16, the second godet roller 14 and the second pressing roller 17 are staggered. The first pressing roller 16 and the second pressing roller 17 are hoisted at the lower end of the upper oil tank cover 3. The third pressing roller 18 is located directly above the third wire guide roller 15 and the third pressing roller 18 is slidably matched with the upper oil tank cover 3. The transmission of the wire bundle is realized through the cooperation of the wire guide roller group and the pressing roller group. The upper oil tank 1 is located at the lower end of the third pressing roller 18 and the third wire guide roller 15 and is provided with an inclined collecting plate 29. By setting the collecting plate 29, the collection area of ​​the upper oil tank 1 can be increased, so that the oil agent dropped from the original wire bundle passing through the third wire guide roller 15 and the third pressing roller 18 can be collected by the collecting plate 29 and flow into the upper oil tank 1.

[0028] For further information, see Figure 1 and Figure 2 As shown, a tension sensor 31 and a speed controller 32 are provided in the second godet roller 14. The tension sensor 31 detects the tension by detecting the deformation and displacement of the raw silk tow. A first position controller 33 is provided on the hoisting mechanism 4. The data input end of the PLC controller 30 is connected to the output end of the tension sensor 31 to transmit tension data. The data output end of the PLC controller 30 is connected to the input end of the speed controller 32 and the first position controller 33 respectively. The PLC controller 30 calculates the tension error according to the tension data of the tension sensor 31 and derives a control signal to the first position controller. 33 and a speed controller 32, the speed controller 32 is connected to the controlled end of the second wire guide roller 14 and its rotation speed is controlled by the control signal, the first position controller 33 is connected to the controlled end of the hoisting mechanism 4 and its height position is adjusted by the control signal, and the PLC controller 30 outputs instructions to drive the hoisting mechanism 4 to adjust the height of the upper oil tank cover 3, and then the height of the first wire pressing roller 16 and the second wire pressing roller 17 can be adjusted, thereby adjusting the tension of the raw silk bundle, and then by changing the rotation speed of the second wire guide roller 14, the tension is fine-tuned, so that the tension of the raw silk remains constant, ensuring the uniformity of oiling.

[0029] For further information, see Figure 1 and Figure 3As shown, the upper oil tank cover 3 is provided with a cylinder 19 for driving the third pressing roller 18 to slide up and down. The extension and contraction of the cylinder 19 drives the third pressing roller 18 to slide up and down. The third pressing roller 18 is provided with an oil film thickness sensor 34 and a second position controller 35. The oil film thickness sensor 34 uses a capacitance method to detect the oil film between the third pressing roller 18 and the third godet 15. By considering the third pressing roller 18 and the third godet 15 as two plates of a capacitor and the oil film in between as a dielectric, the oil film thickness, PL, is calculated according to the capacitance value calculation formula. The data input end of the C controller 30 is connected to the output end of the oil film thickness sensor 34 to transmit the oil film thickness data. The data output end of the PLC controller 30 is connected to the input end of the second position controller 35. The PLC controller 30 calculates the required position adjustment amount according to the oil film thickness data of the oil film thickness sensor 34 and then derives a control signal to the second position controller 35. The second position controller 35 is connected to the cylinder 19 and adjusts the height of the third wire pressing roller 18 according to the control signal, thereby adjusting the oil film thickness, which helps to achieve continuous and stable production of raw silk bundles and reduce production costs.

[0030] For further information, see Figure 1 As shown, an oiling pipe 7 and a recovery pipe 8 are provided between the circulation tank 2 and the upper oil tank 1. The oil in the upper oil tank 1 flows into the circulation tank 2 through the recovery pipe 8. After the oil is circulated and purified through the circulation tank 2, it flows back to the upper oil tank 1 through the oiling pipe 7, thereby realizing the recycling of the oil, reducing the waste of the oil, and saving costs. A first filter 9 is provided on the recovery pipe 8 to filter the oil flowing into the circulation tank 2. A circulation pump 10 and a flow meter 11 are provided on the oiling pipe 7. The oiling pipe 7 is located between the circulation pump 10 and the circulation tank 2 and is fixedly connected with a second filter 12. The oil circulated in the circulation tank 2 is filtered by the second filter 12, and then the oil is input into the upper oil tank 1 through the circulation pump 10. The flow meter 11 can detect the flow rate of the recovered oil in real time to realize the precise delivery of the oil.

[0031] For further information, see Figure 1 and Figure 5As shown, a high shear cell crushing agitator 23 is provided in the circulation tank 2, and a deionized water inlet 24 and an oil agent inlet 25 are respectively provided on the side walls of the circulation tank 2. The deionized water inlet and the oil agent inlet 25 are respectively fixedly connected with a second receiving valve 26 and a third receiving valve 27. The high shear cell crushing agitator can control the particle size of the oil agent by shearing speed. Before starting the circulation system, the oil agent and deionized water are supplied in proportion to the circulation tank 2 and are uniformly mixed by the high shear cell crushing agitator. A concentration sensor 37 is provided on the circulation pump 10, and a fourth receiving valve 28 is provided between the circulation pump 10 and the second filter 12. The data input end of the PLC controller 30 is connected to the output end of the concentration sensor 37 to transmit concentration data. The data output end of the PLC controller 30 is respectively connected to the input end of the second receiving valve 26, the third receiving valve 27 and the fourth receiving valve 28. The PLC controller 30 controls the particle size of the oil agent according to the concentration sensor. After calculating the concentration error based on the concentration data of 37, a control signal is derived to the second receiving valve 26, the third receiving valve 27 and the fourth receiving valve 28. The second receiving valve 26 controls the switch of the deionized water inlet 24, the third receiving valve 27 controls the switch of the oil inlet 25, and the fourth receiving valve 28 controls the switch of the upper oil pipeline 7. When the concentration sensor 37 detects that the oil concentration is unstable, the PLC controller 30 outputs a control signal, and the fourth receiving valve 28 receives the signal to close the circulation pump 10. At the same time, the second receiving valve 26 and the third receiving valve 27 receive the signal to open the deionized water inlet 24 and the oil inlet 25 to adjust the oil concentration in the circulation tank 2. When the concentration sensor 37 detects that the oil concentration is stable, the PLC controller 30 outputs a control signal, and the fourth receiving valve 28 receives the signal to open the circulation pump 10 to deliver oil to the upper oil tank 1, thereby ensuring the concentration of the delivered oil and making the oil have better quality.

[0032] For further information, see Figure 1 As shown, the upper oil tank 1 and the circulation tank 2 are both provided with temperature regulating devices electrically connected to the PLC controller 30. The temperature regulating devices are used to regulate the stability of the oil in the upper oil tank 1 and the circulation tank 2 to ensure the quality of the oil. At the same time, the oil supply pipe 7 and the recovery pipe 8 are both made of thermal insulation materials to ensure the temperature stability of the oil to achieve better production quality.

[0033] For details, please refer to Figure 1 and Figure 4As shown, the temperature regulating device includes a temperature sensor 36, a constant temperature heating tube 20 and a cooling tube 21. The water outlet of the cooling tube 21 is located at the upper end of the water inlet to ensure sufficient cooling of the temperature. A first receiving valve 22 is provided at the water inlet end of the cooling tube 21. The data input end of the PLC controller 30 is connected to the output end of the temperature sensor 36 to transmit temperature data. The data output end of the PLC controller 30 is connected to the constant temperature heating tube 20 and the input end of the first receiving valve 22. The PLC controller 30 calculates the required position adjustment amount according to the temperature data of the temperature sensor 36 and then derives a control signal to the constant temperature heating tube 20 and the first receiving valve 22. When the temperature is too low, the constant temperature heating tube 20 is heated and heated by the control signal; on the contrary, when the temperature is too high, the first receiving valve 22 is opened by the control signal to allow cooling water to flow in for cooling.

[0034] For details, please refer to Figure 1 As shown, when the present invention is used, first, according to the production process requirements, the parameters such as oil delivery flow, oil concentration, oil film thickness, oiling speed, oil temperature, shear speed, tow tension, flow rate, etc. are set, and the oil is prepared in a certain proportion. After the temperature and concentration are stable, the circulation pump 10 is turned on to send the oil in the circulation tank 2 into the upper oil tank 1, so that the oil liquid level in the entire upper oil tank 1 and the circulation tank 2 is stable, and then the raw silk tow is pulled from the first wire guide roller 13 to the third wire guide roller 15; after the tow is pulled to the third wire guide roller 15, the hoisting mechanism 4 on the upper oil tank cover 3 is started to lower the upper oil tank cover 3 to a certain height to semi-close the upper oil tank 1. At this time, the first pressing roller 16, the second pressing roller 17 and the third pressing roller 18 also drop accordingly to give the tow a certain tension, and then monitor the tension of the tow, and adjust the speed of the second wire guide roller 14 and the position of the first pressing roller 16 and the second pressing roller 17 in time to obtain appropriate tension and ensure stable operation of the tow; after waiting for the above preparations to be completed, turn on the ultrasonic atomizer 5 to oil the raw silk tow, and the recovered oil is filtered once and then enters the circulation tank 2. At the same time, the oil inlet 25 and the deionized water inlet 24 are opened to maintain the concentration of the oil in the circulation tank 2 stable; the stable oil is then sent to the upper oil tank 1 by the circulation pump 10 after secondary filtration to realize the recycling of the oil.

[0035] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A highly efficient oiling device for PAN-based carbon fiber precursor, comprising an oiling tank (1), a circulation tank (2) and a PLC controller (30), characterized in that: An upper oil tank cover (3) is provided above the upper oil tank (1), and a hoisting mechanism (4) for driving the upper oil tank cover (3) to move up and down is provided above the upper oil tank cover (3). An ultrasonic atomizer (5) and a guide roller group and a pressing roller group for driving the raw yarn to move are provided between the upper oil tank (1) and the upper oil tank cover (3). Both the guide roller group and the pressing roller group can be adjusted. The PLC controller (30) is electrically connected to the hoisting mechanism (4), the guide roller group, and the pressing roller group. The upper oil tank (1) is provided with an ultrasonic atomizer (5). An oil supply pump (6) is connected to the oil supply pipe (7) and a recovery pipe (8) are provided between the circulation tank (2) and the oil supply pipe (1); a temperature regulating device electrically connected to a PLC controller (30) is provided in both the oil supply tank (1) and the circulation tank (2); a first filter (9) is provided on the recovery pipe (8); a circulation pump (10) and a flow meter (11) are provided on the oil supply pipe (7); and a second filter (12) is fixedly connected to the oil supply pipe (7) between the circulation pump (10) and the circulation tank (2).

2. The PAN-based carbon fiber precursor efficient oiling device according to claim 1, characterized in that: The wire guide roller group includes a first wire guide roller (13), a second wire guide roller (14) and a third wire guide roller (15); the wire pressing roller group includes a first wire pressing roller (16), a second wire pressing roller (17) and a third wire pressing roller (18); the first wire guide roller (13) and the third wire guide roller (15) are respectively located at the notches on both sides of the upper oil tank (1) and the first wire guide roller (13) and the third wire guide roller (15) are in the same horizontal plane; the first wire pressing roller (16), the second wire guide roller (14) and the second wire pressing roller (17) are staggered; the first wire pressing roller (16) and the second wire pressing roller (17) are hoisted at the lower end of the upper oil tank cover (3); the third wire pressing roller (18) is located directly above the third wire guide roller (15) and the third wire pressing roller (18) is in sliding cooperation with the upper oil tank cover (3).

3. The PAN-based carbon fiber precursor efficient oiling device according to claim 1, characterized in that: A tension sensor (31) and a speed controller (32) are provided in the second wire guide roller (14), and a first position controller (33) is provided on the hoisting mechanism (4). The data input end of the PLC controller (30) is connected to the output end of the tension sensor (31) to transmit tension data, and the data output end of the PLC controller (30) is connected to the input ends of the speed controller (32) and the first position controller (33) respectively. The PLC controller (30) calculates the tension error according to the tension data of the tension sensor (31) and derives a control signal to the first position controller (33) and the speed controller (32). The speed controller (32) is connected to the controlled end of the second wire guide roller (14) and controls its rotation speed by the control signal. The first position controller (33) is connected to the controlled end of the hoisting mechanism (4) and adjusts its height position by the control signal.

4. The PAN-based carbon fiber precursor efficient oiling device according to claim 2, characterized in that: The upper oil tank (1) cover is provided with a cylinder (19) for driving the third wire pressing roller (18) to slide up and down. The third wire pressing roller (18) is provided with an oil film thickness sensor (34) and a second position controller (35). The data input end of the PLC controller (30) is connected to the output end of the oil film thickness sensor (34) to transmit the oil film thickness data. The data output end of the PLC controller (30) is connected to the input end of the second position controller (35). The PLC controller (30) calculates the required position adjustment amount according to the oil film thickness data of the oil film thickness sensor (34) and derives a control signal to the second position controller (35). The second position controller (35) is connected to the cylinder (19) and adjusts the height of the third wire pressing roller (18) according to the control signal.

5. The high-efficiency oiling device for PAN-based carbon fiber precursor according to claim 1, characterized in that: The temperature regulating device comprises a temperature sensor (36), a constant temperature heating pipe (20) and a cooling pipe (21); a first receiving valve (22) is provided at the water inlet end of the cooling pipe (21); a data input end of the PLC controller (30) is connected to the output end of the temperature sensor (36) to transmit temperature data; a data output end of the PLC controller (30) is connected to the constant temperature heating pipe (20) and the input end of the first receiving valve (22); the PLC controller (30) calculates the required position adjustment amount according to the temperature data of the temperature sensor (36) and derives a control signal to the constant temperature heating pipe (20) and the first receiving valve (22); the constant temperature heating pipe (20) is heated and heated by the control signal, and the first receiving valve (22) is opened and cooled by the control signal.

6. The high-efficiency oiling device for PAN-based carbon fiber precursor according to claim 1, characterized in that: A high-shear cell crushing agitator (23) is provided in the circulation tank (2), and a deionized water inlet (24) and an oil agent inlet (25) are respectively provided on the side walls of the circulation tank (2), and a second receiving valve (26) and a third receiving valve (27) are respectively fixedly connected to the deionized water inlet and the oil agent inlet (25).

7. The PAN-based carbon fiber precursor efficient oiling device according to claim 6, characterized in that: The circulation pump (10) is provided with a concentration sensor (37), and a fourth receiving valve (28) is provided between the circulation pump (10) and the second filter (12). The data input end of the PLC controller (30) is connected to the output end of the concentration sensor (37) to transmit concentration data, and the data output end of the PLC controller (30) is respectively connected to the input ends of the second receiving valve (26), the third receiving valve (27), and the fourth receiving valve (28). The PLC controller (30) calculates the concentration error based on the concentration data of the concentration sensor (37) and derives a control signal to the second receiving valve (26), the third receiving valve (27), and the fourth receiving valve (28). The second receiving valve (26) controls the switch of the deionized water inlet (24), the third receiving valve (27) controls the switch of the oil agent inlet (25), and the fourth receiving valve (28) controls the switch of the oil supply pipeline (7).

8. The PAN-based carbon fiber precursor efficient oiling device according to claim 1, characterized in that: The upper oil tank (1) is located at the lower end of the third wire pressing roller (18) and the third wire guide roller (15) and is provided with an inclined collecting plate (29).

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