阅读说明：本技术 一种针对碳纤维预氧化炉内的散热部件 (Heat dissipation part in carbon fiber pre-oxidation furnace ) 是由 王金伟 顾峰刚 杨东 杨磊 乔永安 赵磊磊 赵娴 刘敏 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种针对碳纤维预氧化炉内的散热部件,所述预氧化炉内包括第一碳纤维束、第二碳纤维束、第一牵拉机构和第二牵拉机构,所述第一牵拉机构一端与第一碳纤维束连接,所述第一碳纤维束的另一端通过导风通道与所述第二碳纤维束连接；所述第二碳纤维束的另一端与第二牵拉机构连接；所述导风通道的入口与设置在所述预氧化炉内的变频鼓风机连通,所述导风通道由第一疏风通道、散热部件、第二疏风通道构成,所述散热部件设置在第一碳纤维束与第二碳纤维束连接处之间；所述散热部件由带导风孔的第一栅板和第二栅板构成,该装置可以有效保障预氧化炉内温度均匀散热,避免因温度过高造成碳纤维断裂问题。(The invention discloses a heat dissipation component in a carbon fiber preoxidation furnace, which comprises a first carbon fiber bundle, a second carbon fiber bundle, a first traction mechanism and a second traction mechanism, wherein one end of the first traction mechanism is connected with the first carbon fiber bundle, and the other end of the first carbon fiber bundle is connected with the second carbon fiber bundle through an air guide channel; the other end of the second carbon fiber bundle is connected with a second traction mechanism; the inlet of the air guide channel is communicated with a variable frequency blower arranged in the pre-oxidation furnace, the air guide channel is composed of a first wind dispelling channel, a heat dissipation component and a second wind dispelling channel, and the heat dissipation component is arranged between the joint of the first carbon fiber bundle and the second carbon fiber bundle; the heat dissipation part is composed of a first grid plate and a second grid plate with air guide holes, and the device can effectively guarantee uniform heat dissipation of the temperature in the pre-oxidation furnace and avoid the problem of carbon fiber breakage caused by overhigh temperature.)

1. A heat dissipation component for a carbon fiber pre-oxidation furnace is provided, wherein the pre-oxidation furnace comprises a first carbon fiber bundle, a second carbon fiber bundle, a first traction mechanism, a second traction mechanism, an image acquisition mechanism, a light source supply mechanism, a temperature control mechanism and a carbon fiber abnormity clearing device, the image acquisition mechanism, the light source supply mechanism and the temperature control mechanism are respectively arranged on the wall of the pre-oxidation furnace, and the carbon fiber abnormity clearing device is connected with the pre-oxidation furnace through a travelling guide rail; the method is characterized in that: one end of the first traction mechanism is connected with a first carbon fiber bundle, and the other end of the first carbon fiber bundle is connected with the second carbon fiber bundle through an air guide channel; the other end of the second carbon fiber bundle is connected with a second traction mechanism; the inlet of the air guide channel is communicated with a variable frequency blower arranged in the pre-oxidation furnace, the air guide channel is composed of a first wind dispelling channel, a heat dissipation component and a second wind dispelling channel, and the heat dissipation component is arranged between the joint of the first carbon fiber bundle and the second carbon fiber bundle; the heat dissipation part is composed of a first grid plate and a second grid plate with air guide holes; the first wind dispelling channel and the second wind dispelling channel are both provided with an air control valve and a first actuating mechanism; wherein: the air control valve consists of a valve plate, a valve rod, a valve body and a rocker arm, wherein a reinforcing hoop is installed on the valve body, and the valve plate is connected with the rocker arm and is connected with a connecting rod through a connecting shaft of a crank; the air control valve is provided with four valve rods, and each valve rod is connected with a rocker arm through a shaft; the connecting rod is respectively connected with the rocker arm through four crank connecting shafts, meanwhile, the connecting rod is connected with a first actuating mechanism crank, the first actuating mechanism drives the first actuating mechanism crank to rotate to drive the connecting rod to reciprocate, the connecting rod drives the valve plate to rotate together with the rocker arm through the crank connecting shafts, meanwhile, the connecting rod drives the valve rod to rotate, the valve rod drives the valve plate to open and close, and the uniformity control of air flow in the first air dispersing channel and the second air dispersing channel is achieved.

2. The heat dissipation component for the carbon fiber pre-oxidation furnace as recited in claim 1, wherein: the first grid plate and the second grid plate are in a conical shape, the end part of the first grid plate is connected with the end part of the second grid plate, and the bottom of the first grid plate is open; the first grid plate and the second grid plate are made of flexible materials.

3. A heat dissipating component for a carbon fiber pre-oxidation furnace according to claim 1 or 2, wherein: the temperature control mechanism comprises a DSP (digital signal processor), an IGBT (insulated gate bipolar transistor) power module, a frequency converter, a hot air circulating fan and a heating element; wherein: the DSP monitors the temperature and the air speed in the preheating furnace in real time, when the temperature is lower than a preset value, the DSP triggers the IGBT power module to start a heating element, and simultaneously starts the frequency converter to control the rotating speed of the hot air circulating fan; the heating element is a matrix ceramic chip, and the matrix structure is 60cm by 60 cm.

4. The heat dissipation component aiming at the carbon fiber pre-oxidation furnace as recited in claim 1, wherein the image acquisition mechanism is composed of an air source spray head, a transparent component, a rack, a motor transmission gear, a stepping motor, a focusing component, a camera, a protective sleeve and a flange; a camera is arranged in the protective sleeve, and the outer end of the protective sleeve is fixed on the inner wall of the pre-oxidation furnace through a flange; a transparent component is sleeved on the inner side of the front section of the protective sleeve, and the head of the transparent component is an air source spray head; the inside of the protective sleeve is provided with a focusing component, the focusing component is dragged by a motor transmission gear and a rack to move, a stepping motor drives the motor transmission gear through a transmission shaft, the motor transmission gear is meshed with the rack, and the camera forms a clear and complete image through the focusing component.

5. The heat dissipation component for the carbon fiber pre-oxidation furnace as recited in claim 4, wherein: the light source supplying mechanism adopts two combined light sources to supply the first carbon fiber bundle and the second carbon fiber bundleSupplying the beams, wherein the two combined light sources are the combination of a sunlight light source and an ultraviolet light source, and the ultraviolet light source is arranged below the sunlight light source; the daylight light source is an LED lamp strip, and the luminous flux of the daylight light source is 9000(ii) a The ultraviolet light source is an ultraviolet lamp with the intensity of 80。

6. The heat dissipation component for the carbon fiber pre-oxidation furnace as recited in claim 5, wherein: the image acquisition mechanism and the light source supply mechanism are symmetrically arranged on the inner wall of the pre-oxidation furnace, and the image acquisition mechanism is connected with the inner wall of the pre-oxidation furnace through a reflecting plate at an included angle of 20-26 degrees; the light source supply mechanism is connected with the inner wall of the pre-oxidation furnace at an included angle of 21-24 degrees; the distance between the image acquisition mechanism and the carbon fiber tows is 16 mm-20 mm.

7. The heat dissipation component for the carbon fiber pre-oxidation furnace as recited in claim 1, wherein: the carbon fiber abnormity removing device comprises a walking guide rail, two second executing mechanisms, a foreign matter removing table, a cleaning fan and a waste fiber collecting box, wherein the foreign matter removing table is provided with the cleaning fan and the waste fiber collecting box; each second actuating mechanism is arranged on the walking guide rail; every second actuating mechanism comprises positioning gear, switching-over part, step motor, cylinder, solenoid valve, cleaing away sword, speed reducer, wherein: one end of the positioning gear is connected with the walking guide rail, and the other end of the positioning gear is connected with the speed reducer; the speed reducer is connected with the cylinder through a reversing component, one side of the reversing component is connected with a stepping motor, and the bottom of the cylinder is connected with a clearing knife; the cylinder is also provided with an electromagnetic valve.

Technical Field

The invention belongs to a mechanism for radiating carbon fiber production equipment, and particularly relates to a radiating component in a carbon fiber pre-oxidation furnace.

Background

The pre-oxidation function is to convert the precursor of linear analysis chain structure into heat-resistant ladder-shaped molecular structure, and the process is mainly realized by a pre-oxidation furnace. The success of this process is closely related not only to the properties of the carbon fibers, but also to the carbon fiber manufacturing process.

In the production process of the carbon fiber, the pre-oxidation time is generally 60-120 min, and the pre-oxidation is a main factor for controlling the yield of the carbon fiber; the main technical indexes of the pre-oxidation equipment, such as temperature control precision, temperature uniformity, air volume, air speed and the like, are very important for improving the strength of the carbon fiber.

Exothermic reaction is adopted in the pre-oxidation process, and the main effect is to quickly and efficiently take away heat removed in the pre-oxidation process of the precursor. If the heat is not taken away in time, the heat of the fibers of the precursor is concentrated, fusion between the fibers is generated, and the subsequent carbon fibers are fragile and the performance is reduced. If the heat is accumulated more, the tows can be ignited, and the tows are improperly treated and arranged, so that the oxidation furnace explodes. Therefore, the key of the air volume control process is to keep a certain temperature, so that the fibers can efficiently and continuously react, simultaneously, the chemical reaction of the fibers can be quickly and efficiently taken away to generate heat, the fibers cannot be melted and are ignited, the reaction is quicker, the more heat needs to be taken away, and the requirement on equipment is higher. This heat must be removed instantaneously or local temperature excursions can occur which can lead to fiber breakage. Therefore, the instantaneous removal of the heat of reaction released during the pre-oxidation process is a key element in equipment scale-up and industrial production technology.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a heat dissipation component in a carbon fiber preoxidation furnace, which can effectively ensure uniform heat dissipation of the temperature in the preoxidation furnace and avoid the problem of carbon fiber breakage caused by overhigh temperature.

In order to solve the problems of the prior art, the invention adopts the following technical scheme:

a heat dissipation component for a carbon fiber pre-oxidation furnace is provided, wherein the pre-oxidation furnace comprises a first carbon fiber bundle, a second carbon fiber bundle, a first traction mechanism, a second traction mechanism, an image acquisition mechanism, a light source supply mechanism, a temperature control mechanism and a carbon fiber abnormity clearing device, the image acquisition mechanism, the light source supply mechanism and the temperature control mechanism are respectively arranged on the wall of the pre-oxidation furnace, and the carbon fiber abnormity clearing device is connected with the pre-oxidation furnace through a travelling guide rail; one end of the first traction mechanism is connected with a first carbon fiber bundle, and the other end of the first carbon fiber bundle is connected with the second carbon fiber bundle through an air guide channel; the other end of the second carbon fiber bundle is connected with a second traction mechanism; the inlet of the air guide channel is communicated with a variable frequency blower arranged in the pre-oxidation furnace, the air guide channel is composed of a first wind dispelling channel, a heat dissipation component and a second wind dispelling channel, and the heat dissipation component is arranged between the joint of the first carbon fiber bundle and the second carbon fiber bundle; the heat dissipation part is composed of a first grid plate and a second grid plate with air guide holes; the first wind dispelling channel and the second wind dispelling channel are both provided with an air control valve and a first actuating mechanism; wherein: the air control valve consists of a valve plate, a valve rod, a valve body and a rocker arm, wherein a reinforcing hoop is installed on the valve body, and the valve plate is connected with the rocker arm and is connected with a connecting rod through a connecting shaft of a crank; the air control valve is provided with four valve rods, and each valve rod is connected with a rocker arm through a shaft; the connecting rod is respectively connected with the rocker arm through four crank connecting shafts, meanwhile, the connecting rod is connected with a first actuating mechanism crank, the first actuating mechanism drives the first actuating mechanism crank to rotate to drive the connecting rod to reciprocate, the connecting rod drives the valve plate to rotate together with the rocker arm through the crank connecting shafts, meanwhile, the connecting rod drives the valve rod to rotate, the valve rod drives the valve plate to open and close, and the uniformity control of air flow in the first air dispersing channel and the second air dispersing channel is achieved.

Furthermore, the first grid plate and the second grid plate are in a conical shape, the end part of the first grid plate is connected with the end part of the second grid plate, and the bottom of the first grid plate is open; the first grid plate and the second grid plate are made of flexible materials.

Further, the temperature control mechanism comprises a DSP processor, an IGBT power module, a frequency converter, a hot air circulating fan and a heating element; wherein: the DSP monitors the temperature and the air speed in the preheating furnace in real time, when the temperature is lower than a preset value, the DSP triggers the IGBT power module to start a heating element, and simultaneously starts the frequency converter to control the rotating speed of the hot air circulating fan; the heating element is a matrix ceramic chip, and the matrix structure is 60cm by 60 cm.

The first carbon fiber bundle and the second carbon fiber bundle are respectively provided with an image acquisition mechanism for monitoring the abnormity of the tow image, and the image acquisition mechanism consists of an air source spray head, a transparent component, a focusing component, a stretching mechanism, a camera, a protective sleeve and a flange; the protective sleeve is provided with a focusing component and is connected with the inner wall of the pre-oxidation furnace through a flange; the focusing component is connected with the camera through a stretching mechanism; the focusing component is provided with a transparent component with an air source nozzle; the stretching mechanism consists of a gear, a stepping motor and a driving gear; one end of the gear is connected with the transparent component; the other end of the stepping motor is connected with the stepping motor, and the stepping motor is connected with the driving gear through a transmission shaft.

Further, the first carbon fiber bundle and the second carbon fiber bundle are both provided with a light source supply mechanism, the light source supply mechanism adopts two combined light sources, namely a combination of a sunlight light source and an ultraviolet light source, and the ultraviolet light source is arranged below the sunlight light source; the daylight light source is an LED lamp strip, and the luminous flux of the daylight light source is 9000(ii) a The ultraviolet light source is an ultraviolet lamp with intensity of 80。

Further, the image acquisition mechanism and the light source supply mechanism are symmetrically arranged on the inner wall of the pre-oxidation furnace, and the image acquisition mechanism is connected with the inner wall of the pre-oxidation furnace through a reflecting plate at an included angle of 20-26 degrees; the light source supply mechanism is connected with the inner wall of the pre-oxidation furnace at an included angle of 21-24 degrees; the distance between the image acquisition mechanism and the carbon fiber tows is 16 mm-20 mm.

Further, the device for removing the carbon fiber abnormity comprises a walking guide rail, two second actuating mechanisms, a foreign matter removing table, a cleaning fan and a waste fiber collecting box, wherein the foreign matter removing table is provided with the cleaning fan and the waste fiber collecting box; the second actuating mechanism is arranged on the walking guide rail; every second actuating mechanism comprises positioning gear, switching-over part, step motor, cylinder, solenoid valve, cleaing away sword, speed reducer, wherein: one end of the positioning gear is connected with the walking guide rail, and the other end of the positioning gear is connected with the speed reducer; the speed reducer is connected with the cylinder through a reversing component, one side of the reversing component is connected with a stepping motor, and the bottom of the cylinder is connected with a clearing knife; the cylinder is also provided with an electromagnetic valve.

Advantageous effects

1. According to the invention, the air control mechanism is arranged in the pre-oxidation furnace, so that the uniformity and controllability of air flow in the pre-oxidation furnace are ensured, and the problem of carbon fiber breakage caused by overhigh temperature is effectively avoided;

2. according to the invention, through the temperature control mechanism in the pre-oxidation furnace, the temperature in the pre-oxidation furnace can be effectively controlled, and the quality problems of fusing and brittle fracture of carbon fibers caused by overhigh or overlow temperature are prevented;

3. according to the invention, the image acquisition mechanism is arranged on the carbon fiber to accurately capture the image of the carbon fiber tows in the pre-oxidation furnace with serious atomization, and particularly, the image acquisition mechanism and the light source supply mechanism are matched to overcome the influence of the deteriorated production environment in the pre-oxidation furnace on image capture, so that the guarantee is provided for clearing the abnormal state on the carbon fiber tows in the later period;

4. according to the device for removing the abnormal carbon fiber tows, the abnormal carbon fiber tows can be removed accurately through the device for removing the abnormal carbon fiber tows, and the problems that in the prior art, the procedure for removing the abnormal carbon fiber tows is complex and the efficiency is low are solved.

Drawings

FIG. 1 is a schematic structural view of a heat dissipation part in a carbon fiber pre-oxidation furnace;

FIG. 2 is a schematic structural view of a central air control valve for heat dissipation components in a carbon fiber pre-oxidation furnace;

FIG. 3 is a schematic view of a first actuator of a heat dissipation component in a carbon fiber pre-oxidation furnace;

FIG. 4 is a schematic structural diagram of an image acquisition mechanism for a heat dissipation component in a carbon fiber pre-oxidation furnace;

FIG. 5 is a schematic structural diagram of a device for removing carbon fiber anomalies in a heat dissipation component in a carbon fiber pre-oxidation furnace;

fig. 6 is a schematic circuit diagram of a temperature control mechanism for a heat dissipation component in a carbon fiber pre-oxidation furnace.

Description of reference numerals:

101. a first carbon fiber bundle; 102. A second carbon fiber bundle; 103. a first pulling mechanism;

104. a second pulling mechanism; 105. an air guide channel; 106. a variable frequency blower;

107. a first wind-dispelling channel; 108. A heat dissipating member; 109. a second wind-dispelling channel; 110. A wind guide hole;

111. a first grid plate; 112. A second grid plate; 201. An air control valve; 202. A valve plate; 203. A valve stem; 204. a valve body; 205. a rocker arm; 206. A crank connecting shaft; 207. a reinforcing hoop; 208. a connecting rod; 209. a first actuator; 210. a first actuator crank; 212. A first actuator frame; 401. an image acquisition mechanism; 405. a reflective plate; 407. an air source spray head; 408. a transparent component; 409. a rack; 410. a motor transmission gear; 411. a stepping motor; 412. a focusing member; 413. a camera; 414. a protective sleeve; 415. a flange; 416. an air blowing member; 501. a light source supply mechanism; 300. removing the carbon fiber abnormal device; 301 running guide rails; 302. a second actuator; 303. a foreign matter removing table; 304. cleaning a fan; 305. a waste fiber collecting box; 306. positioning a gear; 307. a commutation component; 308. a stepping motor; 309. a cylinder; 310. an electromagnetic valve; 311. clearing the knife; 312. a speed reducer; 601. a temperature control mechanism; 602. a DSP processor; 603. an IGBT power module; 604. a frequency converter; 605. a hot air circulating fan; 606. a heating element.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1, the present invention provides a heat dissipation component for a carbon fiber pre-oxidation furnace, the pre-oxidation furnace comprises a first carbon fiber bundle 101, a second carbon fiber bundle 102, a first pulling mechanism 103 and a second pulling mechanism 104, one end of the first pulling mechanism 103 is connected to the first carbon fiber bundle 101, and the other end of the first carbon fiber bundle 101 is connected to the second carbon fiber bundle 102 through an air guide channel 105; the other end of the second carbon fiber bundle 102 is connected with a second traction mechanism 104; the inlet of the air guide channel 105 is communicated with a variable frequency blower 106 arranged in the pre-oxidation furnace, the air guide channel 105 is composed of a first wind dispelling channel 107, a heat dissipation component 108 and a second wind dispelling channel 109, and the heat dissipation component 108 is arranged between the joints of the first carbon fiber bundle 101 and the second carbon fiber bundle 102; the heat dissipation part 108 is composed of a first grid plate 111 and a second grid plate 112 with air guide holes 110; in order to accelerate the wind flow guiding of the wind inlet, the first grid plate 111 and the second grid plate 112 are in a conical shape, the end part of the first grid plate 111 is connected with the end part of the second grid plate 112, and the bottom of the first grid plate is open. The first grid plate 111 and the second grid plate 112 are made of flexible materials, and can shake with wind to further accelerate wind flow to achieve rapid heat dissipation of carbon fiber bundles, so that the carbon fiber bundles are prevented from being fused due to overhigh temperature. In order to ensure the uniform air control in the pre-oxidation furnace, the method comprises the following steps:

the included angle between the first grid plate 111 and the variable frequency blower 106 and the included angle between the second grid plate 112 and the variable frequency blower 106 are C, C is more than or equal to 0 and less than or equal to 80 degrees, and the minimum distance between the first grid plate 111 and the variable frequency blower 106 and the minimum distance between the second grid plate 112 and the variable frequency blower 106 are C，0cm<L≤20cm。

The porosity of the air guide holes 110 of the first grid plate 111 and the second grid plate 112 is 10-90%, and the relationship between the depth h of the through hole and the sectional area s of the through hole is as follows: h/s is more than or equal to 10 and less than or equal to 100, and the cross section of the through hole is circular.

The air speed flowing into the air control valve 201 is 1-15 m/s, and the uniformity of the air speed is less than or equal to +/-10%; the distance L between the variable frequency blower and the air control valve, the volume V of the air guide channel and the air speed flowing through the air inlet cavityAbout, the specific relational expression:

wherein: h is the height of the air inlet cavity;is the flow coefficient; maximum installation distance between grid plate and variable-frequency blowerAnd cannot exceed 20 cm.

As shown in fig. 2 and 3, the first wind dispelling channel 107 and the second wind dispelling channel 109 are both provided with an air control valve 201. The air control valve 201 of the invention adjusts the opening of the valve in real time according to the actual temperature field distribution in the furnace. The air control valve 201 can adjust the temperature downwards by mixing cold air. The air control valve 201 comprises a valve plate 202, a valve rod 203, a valve body 204 and a rocker arm 205, wherein a valve body reinforcing hoop 207 is installed on the valve body 204, and the valve plate 202 is connected with the rocker arm 205 and is connected with a connecting rod 208 through a crank connecting shaft 206. The air control valve 201 has four valve stems 203, and each valve stem 203 is provided with an air control valve plate rocker arm 205. The air control valve 201 is composed of two groups of valve plates 202. The connecting rods 208 are connected to the rocker arms 205 through four crank connecting shafts 206, respectively. Meanwhile, the connecting rod 208 is connected with a first actuator crank 210, the first actuator crank 210 is installed on a first actuator 209, and the first actuator 209 is fixed on a first actuator frame 212. The first actuator 209 drives the first actuator crank 210 to rotate to drive the connecting rod 208 to reciprocate, the connecting rod 208 drives the valve plate 202 to rotate in connection with the rocker arm 205 through the crank connecting shaft 206, and simultaneously drives the valve rod 203 to rotate, and the valve rod 203 drives the valve plate 202 to open and close, so that the uniformity control of the air flow in the first air dispersing channel and the second air dispersing channel is realized respectively.

In the actual air dispersing process of the invention, air is blown into the air guide channel through a variable frequency blower in the middle of the pre-oxidation furnace, the air flow direction is changed at the joint of the end parts of the first grid plate 111 and the second grid plate 112, the air is uniformly and horizontally blown into the pre-oxidation furnace after passing through the air guide hole, the air direction is horizontal to the movement direction of the tows, and simultaneously the air flows back to the air inlet through the first air dispersing channel 107 and the second air dispersing channel 109 respectively.

The inner walls of the pre-oxidation furnaces are all provided with image acquisition mechanisms 401 for monitoring the abnormity of the tow images, as shown in fig. 4, the image acquisition mechanisms 401 are composed of air source nozzles 407, transparent components 408, racks 409, motor transmission gears 410, stepping motors 411, focusing components 412, cameras 413, protective sleeves 414 and flanges 415. A camera 413 is arranged in the protective sleeve 414, and the outer end of the protective sleeve 414 is fixed on the inner wall of the pre-oxidation furnace through a flange 415. The transparent component 408 is sleeved inside the front section of the protective sleeve 414, and the head of the transparent component 408 is an air source spray head 407. The inside of the protective sleeve 414 is provided with a focusing component 412, the focusing component 412 is driven by a motor transmission gear 410 and a rack 409 to drive a camera 413 to move, a stepping motor 411 drives the motor transmission gear 410 through a transmission shaft, the motor transmission gear 410 is meshed with the rack 409, the camera 413 forms a clear and complete image through the focusing component 412, and the camera 413 consists of a camera lens and a camera sensitive piece. The image acquisition mechanism 401 is obliquely installed at 25 ︒ and is installed at the center point of the entire width of the carbon fiber tow. The reflecting plate 405 is installed behind the image acquisition mechanism, and plays a role in enhancing the illumination intensity in the hearth. In the present invention, the central axes of the transparent components 408 of the image capturing mechanism 401 are coincident, and the distance between the head of the transparent component 408 and the (carbon fiber) filament bundle is preferably 17 mm. The front end of the transparent component 408 is made of glass with high temperature resistance of 350 ℃. The reflecting plate 405 is fixedly installed at the rear end of the image acquisition mechanism, the size of the reflecting plate is 40cm by 40cm, and the image acquisition mechanism 401 is provided with a positive pressure air blowing component 416 capable of cleaning the lens of the camera.

The pre-oxidation furnaces are internally provided with light source supply mechanisms 501, the light source supply mechanisms 501 adopt two combined light sources, namely a combination of a sunlight light source and an ultraviolet light source, and the ultraviolet light source is arranged below the sunlight light source; the daylight light source is an LED lamp strip, and the luminous flux of the daylight light source is 9000(ii) a The ultraviolet light source is an ultraviolet lamp with intensity of 80. The image acquisition mechanism 401 and the light source supply 501 mechanism are symmetrically arranged on the inner wall of the pre-oxidation furnace, and the image acquisition mechanism 401 is connected with the inner wall of the pre-oxidation furnace through a reflecting plate at an included angle of 20-26 degrees; the light source supply mechanism 501 is connected with the inner wall of the pre-oxidation furnace at an included angle of 21-24 degrees; the distance between the positive pressure air blowing component 416 and the carbon fiber tows is 16 mm-20 mm.

As shown in fig. 5, a carbon fiber abnormity removing device 300 is connected in the pre-oxidation furnace through a traveling guide rail 301, the carbon fiber abnormity removing device 300 comprises the traveling guide rail 301, two second actuating mechanisms 302, a foreign matter removing table 303, a cleaning fan 304 and a waste fiber collecting box 305, and the foreign matter removing table 303 is provided with the cleaning fan 304 and the waste fiber collecting box 305; the second actuator 302 is connected with the traveling guide rail 301 through a positioning gear 306; each second actuator 302 is composed of a positioning gear 306, a reversing component 307, a stepping motor 308, an air cylinder 309, an electromagnetic valve 310, a clearing knife 311 and a speed reducer 312, wherein:

one end of the positioning gear 306 is connected with the traveling guide rail 301, and the other end thereof is connected with the speed reducer 312; the speed reducer 312 is connected with the cylinder 309 through a reversing component 307, one side of the reversing component 307 is connected with a stepping motor 308, and the bottom of the cylinder 309 is connected with a clearing knife 311; the cylinder 309 is also provided with an electromagnetic valve 310.

In the device 300 for clearing carbon fiber abnormality of the present invention, both the two second actuators 302 reach the positioning area. The system for recognizing the carbon fiber abnormality drives the nozzle electromagnetic valve 310 to spray high-pressure gas, and the cleaning knife 311 is rapidly pushed out through the air cylinder 309 to cut the defective tows. The carbon fiber abnormality removing apparatus 300 drives the cleaning fan 304 to blow the cut tow on the foreign matter table to the waste fiber collecting box 305. The device 300 for clearing carbon fiber abnormity calculates the time for sending the control command according to the conveying speed of the tows, and drives the corresponding control second executing mechanism 302 to clear when broken filaments and broken filaments reach a clearing area, so that the on-line automatic clearing of the broken filaments and the broken filaments is realized.

As shown in fig. 1 and fig. 6, a temperature control mechanism 601 is arranged in the pre-oxidation furnace, and the temperature control mechanism 601 includes a DSP processor 602, an IGBT power module 603, a frequency converter 604, a hot air circulation fan 605, and a matrix ceramic PTC heating element 606; the DSP processor 602 monitors the temperature and the air speed in the preheating furnace in real time, when the temperature is lower than a preset value, the DSP processor 602 triggers the IGBT power module 603 to start the heating element 606, and simultaneously starts the frequency converter 604 to control the rotating speed of the hot air circulating fan 605; so as to ensure the temperature in the pre-oxidation furnace to be constant. The temperature control mechanism comprises a DSP processor, an IGBT power module, a frequency converter, a hot air circulating fan and a heating element; wherein: the DSP processor monitors the temperature and the air speed in the preheating furnace in real time, when the temperature is lower than a preset value, the DSP processor triggers the IGBT power module to start the heating element, and meanwhile, the frequency converter is started to control the rotating speed of the hot air circulating fan, so that the temperature distribution in the furnace is more uniform, and the temperature control is more accurate.

Since the heating element 606 can be automatically adjusted at 100-350 ℃. Each ceramic PTC heating element 606 is 60cm by 60cm in size. Each layer of heating planes forms a heating matrix of 5 rows and 10 columns. The temperature of each temperature zone in the pre-oxidation furnace is controlled by a heating element 606, the heating element 606 is heated at constant temperature by adopting PTC special ceramics, and the power of an electric drive device is controlled by adopting IGBT. The PTC special ceramic has constant temperature heating characteristic and can inhibit the voltage fluctuation of a power grid.

It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.