Online broken yarn carrying device of carbon fiber steam drawing machine

Abstract

The invention relates to an on-line broken yarn carrying device of a carbon fiber steam drawing machine. The on-line broken yarn carrying device comprises a movable self-suction gun, an anti-static yarn guide steel rope, a rubber guide wheel and an on-line tension meter. The anti-static wire guide steel rope is used for penetrating into the steam channel to carry wires on line when the wires of the steam channel of the carbon fiber steam drawing machine are broken; the movable self-suction gun is used for sucking out an anti-static wire guide steel rope with wires from the other end of the steam channel when the wires of the steam channel of the carbon fiber steam drawing machine are broken; the rubber guide wheels comprise a first rubber guide wheel and a second rubber guide wheel which are arranged up and down and are used for discharging heat of overheated carbon fiber tows produced by the carbon fiber steam drawing machine; the online tension meter is connected with the rubber guide wheels and used for monitoring the state of the carbon fiber tows passing through the first rubber guide wheel and the second rubber guide wheel. The device has the beneficial effects of preventing steam drafting yarn breakage and improving the production efficiency of carbon fiber precursors.

Description

[Technical field]

[0001] The invention relates to the technical field of petrochemical machinery, and in particular to an online wire-drawing device for a carbon fiber steam drawing machine. [Background technology]

[0002] Carbon fiber is a high-strength and high-modulus polymer fiber with a carbon content of more than 90%. In addition to its many advantages such as low density, high temperature resistance, corrosion resistance, and fatigue resistance, it also has good processability, light weight, high specific strength and specific modulus. It is a new type of reinforcing material and is widely used in weapons, aerospace, construction, automobiles and ships, medical and industrial equipment, sports and leisure products and other fields.

[0003] At present, polyacrylonitrile fiber (PAN) is mainly used to prepare high-performance carbon fiber, that is, PAN-based carbon fiber. The production steps of carbon fiber generally include polymerization, spinning, oxidation and carbonization. However, the quality of PAN raw fiber is still a bottleneck in the development of high-performance carbon fiber.

[0004] High-power steam drawing machine is widely used in the production process of carbon fiber precursor, mainly composed of a drawing tank and a labyrinth sealing box. The drawing tank is equipped with a porous distribution steam channel. The precursor enters the drawing tank through the gap between the upper and lower labyrinth sealing boxes. The yarn bundle is blown by a certain pressure steam and a certain tension control, which can effectively improve the orientation and crystallinity of the precursor. It is a key equipment for preparing high-performance carbon fiber precursor.

[0005] However, the steam drafting machine requires good sealing and narrow channel space. For some fragile bundles, the passing rate is low and the wires are easily broken in the channel. If it is not discovered in time, the broken wires will accumulate in the channel, and the consequences will be disastrous. For the problem of broken wires in steam drafting, the domestic treatment method generally adopts closing the steam solenoid valve and handling the broken wires in the channel offline. The treatment has a lag and affects the full roll rate of the spinning position, and even stops spinning.

[0006] Aiming at the technical problem that steam drawing easily causes wire breakage in a channel, the present invention makes technical improvements to an online wire drawing device of a carbon fiber steam drawing machine. [Summary of the invention]

[0007] The purpose of the present invention is to provide an online wire-drawing device which can prevent wire breakage during steam drawing and improve the production efficiency of carbon fiber precursor.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is an online wire-carrying device for a carbon fiber steam drawing machine with broken wires, the carbon fiber steam drawing machine is mainly composed of a labyrinth sealing box and a drawing tank, the drawing tank is provided with a porous distribution type steam tunnel, and the carbon fiber raw wire enters the drawing tank through the gap between the upper and lower labyrinth sealing boxes; it includes a mobile self-priming gun, an anti-static wire guide steel rope, a rubber guide wheel and an online tension meter; the anti-static wire guide steel rope is used to penetrate into the steam tunnel and carry the wire online when the steam tunnel of the carbon fiber steam drawing machine has broken wires; the mobile The self-priming gun is used to suck out the anti-static wire guide rope with online wire from the other end of the steam tunnel when the steam tunnel of the carbon fiber steam drawing machine breaks the wire; the rubber guide wheel includes a first rubber guide wheel and a second rubber guide wheel arranged up and down, which are used to discharge the heat of the overheated carbon fiber bundle produced by the carbon fiber steam drawing machine, and prevent the overheated carbon fiber bundle from winding around the metal guide roller due to electrostatic friction; the online tension meter and the rubber guide wheel are connected to each other, and are used to monitor the state of the carbon fiber bundle passing through the first rubber guide wheel and the second rubber guide wheel.

[0009] Preferably, the surface of the antistatic wire guide steel rope is coated with an antistatic dust removal film, which is antistatic, friction-resistant, and has a small diameter, and fits the middle opening of the steam tunnel during the online wire-carrying process.

[0010] Preferably, the antistatic guide wire steel rope has a length of 1.5m to 3m and a diameter of 0.5mm.

[0011] Preferably, the mobile self-priming gun includes a porous distribution internal cavity corresponding to the porous distribution steam channel, has the ability to suck the anti-static wire guide steel rope with wire online into the porous distribution internal cavity, and can automatically control the suction cavity strength according to the wire breakage situation.

[0012] Preferably, the mobile self-priming gun further includes an air source switch valve, an air source distributor and an air source main pipe, and the total pressure of the air source is between 0.4 MPa and 0.6 MPa.

[0013] Preferably, the first rubber guide wheel and the second rubber guide wheel have high thermal conductivity, low friction and anti-static properties. The angles of the first rubber guide wheel and the second rubber guide wheel are adjusted online from 90° to 150° according to the stacking degree of the carbon fiber bundles to avoid incomplete drying caused by stacking of the carbon fiber bundles.

[0014] Preferably, the rubber guide wheel further includes a guide wheel axle, side covers on both sides of the guide wheel and a guide wheel bracket.

[0015] Preferably, the online tension meter includes a bracket base, a spring sheet, a permanent magnet assembly and a Hall sensor, the bracket base and the rubber guide wheel are connected to each other, the fixed end of the spring sheet is installed on the support base, the permanent magnet assembly is installed on the free end of the spring sheet, the Hall sensor is installed on the permanent magnet assembly, and the permanent magnet assembly supports the carbon fiber bundle passing through the first rubber guide wheel and the second rubber guide wheel.

[0016] Preferably, the online tension meter converts the tension change in the movement of the carbon fiber bundle into the elastic deformation of the spring sheet, and then the position of the permanent magnet assembly changes, resulting in the change of the magnetic field generated by the permanent magnet assembly, and the Hall sensor tracks the magnetic field change online to monitor the operation of the carbon fiber bundle.

[0017] Compared with the prior art, the online wire-carrying device for broken wires of a carbon fiber steam drawing machine of the present invention has the following beneficial effects: optimizing the shortcomings of the existing process of processing broken wires of a steam drawing machine, improving the production efficiency of industrial carbon fiber precursor and improving product quality; it can reduce the situation of stopping the steam drawing machine for steam processing broken wires, does not affect the operating state of the steam drawing machine, and is convenient and efficient in wire-carrying, and can improve the processing of broken wires during winding rollers and the long-term stable production of precursor wires.

Brief Description of the Drawings

[0018] Figure 1 The present invention is a schematic diagram of the structure of a broken-filament online-belting device of a carbon fiber steam drawing machine.

[0019] Figure 2 It is a structural schematic diagram of an online tension meter for a broken-filament online belt device of a carbon fiber steam drawing machine.

[0020] Figure 3 It is a structural schematic diagram of a mobile self-priming gun for a broken-wire online wire-carrying device of a carbon fiber steam drawing machine.

[0021] Figure 4 It is a schematic diagram of the wire guide rope structure of the online wire-winding device of a carbon fiber steam drawing machine.

[0022] Figure 5 The present invention is a structural schematic diagram of a rubber guide wheel of an online wire-bearing device for a carbon fiber steam drawing machine.

[0023] The reference numerals and components involved in the accompanying drawings are as follows: 1. bracket base, 2. spring sheet, 3. permanent magnet assembly, 4. Hall sensor. [Specific implementation method]

[0024] The present invention will be further described below in conjunction with embodiments and with reference to the accompanying drawings.

[0025] Example 1

[0026] This embodiment realizes an online wire-winding device for a carbon fiber steam drawing machine with broken wires.

[0027] The device of this embodiment is designed to optimize the shortcomings of the existing steam drawing machine in the process of processing broken yarns, improve the production efficiency of industrial carbon fiber precursor, enhance product quality, and achieve efficient and stable production of carbon fiber precursor. A practical and operable device is provided for online stripping of yarns after broken yarns in a steam drawing machine.

[0028] The device of this embodiment is suitable for online yarn stripping after yarn breakage in steam drawing machines of various specifications, and can be used for efficient yarn stripping in spinning production lines with high-power steam drawing machines.

[0029] Figure 1 This is a schematic diagram of the structure of a carbon fiber steam drawing machine broken wire online wire device. Figure 1 As shown, this embodiment is a carbon fiber steam drawing machine broken wire online wire device, including an online tension meter, a mobile multi-hole distribution self-priming gun, an anti-static wire guide steel rope, and a rubber guide wheel. The online tension meter plays the role of real-time monitoring of the state of the wire bundle; the self-priming gun sucks out the broken wire to prevent the broken wire from blocking the wire passage and the steam tunnel; the anti-static wire guide steel rope is mainly used for threading; the rubber guide wheel prevents the overheated wire bundle from winding around the roller due to static friction with the guide roller; during the online wire belting process, the wire bundle walks out of the steam tunnel with the help of the wire guide steel rope, and the surface temperature of the wire bundle is relatively high. If it passes through the roller (guide roller) directly, the friction coefficient is large and the thermal conductivity is poor, which is very likely to cause winding around the roller. With the advantages of high thermal conductivity, low friction and anti-static of the rubber guide wheel, the above situation can be avoided.

[0030] The mobile multi-hole distribution self-priming gun of the device of this embodiment is located at the outlet of the steam drawing machine. The online tension meter is connected to the rubber guide wheel. The self-priming gun has a multi-hole distributor corresponding to the outlet of the drawing machine (wire passage and steam tunnel). The steam tunnel is a channel inside the steam drawing machine for providing steam. The wire guide rope is spare and can be placed above the steam drawing machine. When the wire is broken, the power provided by the compressed air of the self-priming gun will suck the broken wire on the wire guide rope into the internal cavity of the multi-hole distributor of the self-priming gun.

[0031] In the device of this embodiment, the online tension meter uses a Hall sensor (linear Hall element) to accurately track the changes in the weak magnetic field of the raw silk of the steam drawing machine to achieve the tension control function, and monitors the state of the raw silk in the steam drawing machine in real time. It can promptly remind the staff to deal with the broken silk to avoid the long-term accumulation of broken silk in the steam tunnel and the drawing tank. Figure 2 This is a structural diagram of an online tension meter for a carbon fiber steam drawing machine with broken wires and an online wire device. Figure 2As shown, the online tension meter includes a bracket base, a spring sheet, a permanent magnet assembly and a Hall sensor. The online tension meter plays a role in monitoring the state of the tow. If a broken wire occurs, the tension will fluctuate. The operation of the tow can be judged by the fluctuation of the tension meter value. The spring sheet is installed on the bracket base, the permanent magnet assembly is installed on the free end of the spring sheet, and the Hall sensor is installed on the permanent magnet assembly; the Hall sensor (linear Hall element) is used to accurately track the change of the Gaussian-level weak magnetic field, the change of the spring sheet caused by the change of the tension of the fiber during movement, and then the change of the magnetic field caused by the change of the position of the permanent magnet assembly, which is tracked online by the linear Hall integrated circuit.

[0032] In the device of this embodiment, the mobile multi-hole distribution plate self-priming gun carries multiple channels to handle the situation of broken wires in multiple steam channels. In the device of this embodiment, the mobile multi-hole distribution plate self-priming gun provides an air source pressure that can freely adjust the wire suction force to prevent broken wires from being stuck in the steam drawing machine channel. Figure 3 This is a structural diagram of a mobile self-priming gun for a carbon fiber steam drawing machine with broken wires and an online wire-carrying device. Figure 3 As shown, the mobile porous distribution plate self-priming gun includes an air source switch valve, an air source distributor and an air source main pipe. The total air source pressure is between 0.4-0.6MPa. It has the ability to suck broken wires and anti-static wire guide ropes into the internal cavity of the porous distributor, and can automatically adjust the opening of the air source switch valve to control the suction force according to the broken wire situation.

[0033] The present embodiment is an online wire-belting device for a carbon fiber steam drawing machine. The antistatic wire-guiding steel rope is coated with an antistatic dust-removing film on its surface. It has the advantages of being antistatic, friction-resistant, and having a small diameter. During the wire-belting process, it can basically fit the middle opening of the tunnel. Figure 4 This is a schematic diagram of the structure of the wire guide steel rope of the online wire-carrying device of the carbon fiber steam drawing machine. Figure 4 As shown, in the device of this embodiment, the anti-static wire guide rope has no obvious adsorption or entanglement with the original wire. The wire guide rope has a length of 1.5m-3m and a diameter of 0.5mm, and is capable of handling broken wires in a long channel steam drawing machine.

[0034] Figure 5 This is a schematic diagram of the structure of the rubber guide wheel of the online wire-drawing device of the carbon fiber steam drawing machine. Figure 5As shown, in the device of this embodiment, the rubber guide wheel includes two upper and lower rubber guide wheels, a guide wheel axle, two side covers and a guide wheel bracket. The rubber guide wheel has high thermal conductivity, low friction and anti-static effects. The guide wheels are arranged up and down, and the angles of the upper and lower guide wheels can be adjusted online from 90° to 150° to achieve guidance and greatly alleviate the heat emission after passing through the steam drawing machine. In the device of this embodiment, the raw silk coming out of the steam drawing machine passes through the rubber guide wheel, which can effectively alleviate the cold shrinkage problem caused by the crossover of cold and hot caused by the raw silk directly passing through the metal guide roller. The guide wheel angle is adjusted according to the stacking degree of the raw silk single filaments to avoid incomplete drying due to the stacking of the raw silk.

[0035] The device of this embodiment can reduce the situation of broken wires when the steam drawing machine stops steam processing, does not affect the operating state of the steam drawing machine, is convenient and efficient in wire drawing, and can improve the processing of broken wires around the roller and the long-term stable production of raw wire.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A carbon fiber steam drawing machine broken wire online wire device, the carbon fiber steam drawing machine is mainly composed of a labyrinth sealing box and a drawing tank, the drawing tank is provided with a porous distribution type steam channel, the carbon fiber precursor passes through the gap between the upper and lower labyrinth sealing boxes into the drawing tank; characterized in that: It comprises a mobile self-priming gun, an anti-static wire guide rope, a rubber guide wheel and an online tension meter; the anti-static wire guide rope is used to penetrate into the steam channel and carry the wire online when the steam channel of the carbon fiber steam drawing machine breaks the wire; the mobile self-priming gun is used to suck out the anti-static wire guide rope carrying the wire online from the other end of the steam channel when the steam channel of the carbon fiber steam drawing machine breaks the wire; the rubber guide wheel comprises a first rubber guide wheel and a second rubber guide wheel arranged up and down, which are used to produce overheated carbon fiber bundles produced by the carbon fiber steam drawing machine, discharge the heat of the overheated carbon fiber bundles, and prevent the overheated carbon fiber bundles from winding around the metal guide roller due to electrostatic friction; the online tension meter and the rubber guide wheel are connected to each other and are used to monitor the state of the carbon fiber bundles passing through the first rubber guide wheel and the second rubber guide wheel.

2. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 1, characterized in that: The surface of the antistatic wire guide steel rope is coated with an antistatic dust removal film, which is antistatic, friction-resistant, and has a small diameter, and fits the middle opening of the steam tunnel during the online wire-carrying process.

3. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 2, characterized in that: The antistatic wire guide rope has a length of 1.5m to 3m and a diameter of 0.5mm.

4. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 1, characterized in that: The mobile self-priming gun includes a porous distribution internal cavity corresponding to the porous distribution steam channel, has the ability to suck the anti-static wire guide steel rope with wires online into the porous distribution internal cavity, and can automatically control the suction cavity strength according to the wire breakage situation.

5. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 4, characterized in that: The mobile self-priming gun also includes an air source switch valve, an air source distributor and an air source main pipe, and the total pressure of the air source is between 0.4MPa and 0.6MPa.

6. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 1, characterized in that: The first rubber guide wheel and the second rubber guide wheel have high thermal conductivity, low friction and anti-static properties. The angles of the first rubber guide wheel and the second rubber guide wheel are adjusted online from 90° to 150° according to the stacking degree of the carbon fiber bundles to avoid incomplete drying caused by stacking of the carbon fiber bundles.

7. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 6, characterized in that: The rubber guide wheel also includes a guide wheel axle, side covers on both sides of the guide wheel and a guide wheel bracket.

8. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 1, characterized in that: The online tension meter includes a bracket base, a spring sheet, a permanent magnet assembly and a Hall sensor. The bracket base and the rubber guide wheel are connected to each other. The fixed end of the spring sheet is installed on the support base frame. The permanent magnet assembly is installed on the free end of the spring sheet. The Hall sensor is installed on the permanent magnet assembly. The permanent magnet assembly supports the carbon fiber bundle passing through the first rubber guide wheel and the second rubber guide wheel.

9. The device for removing broken wires from a carbon fiber steam drawing machine according to claim 8, characterized in that: The online tension meter converts the tension change in the movement of the carbon fiber tow into the elastic deformation of the spring sheet, and then the position of the permanent magnet assembly changes, resulting in the change of the magnetic field generated by the permanent magnet assembly. The Hall sensor tracks the magnetic field change online to monitor the operation of the carbon fiber tow.

Images