Carbon fiber precursor production hot draw device

Abstract

The present application relates to carbon fiber precursor production hot draft device, including bath box and the draft roller of setting in bath box one side, the inner chamber of the bath box is cut off with heating groove and bath groove through heat conduction plate respectively, the inner chamber of heating groove and bath groove is filled with liquid heat conducting medium, the heating rod for heating liquid heat conducting medium is fixedly connected in the inner chamber of heating groove, the present application relates to carbon fiber processing technical field.The carbon fiber precursor production hot draft device, the liquid medium in the heating groove is heated through the heating rod in the heating groove, then the liquid medium in the bath groove is heat conducted through the heat conduction plate, to heat the precursor, can effectively prevent local overheating and produce bubble, the disturbance of liquid medium and the impact of bubble generation to the silk, heating effect is good, and the heating is stable, through the secondary blocking of screen plate, the fluctuation of liquid medium can be effectively reduced within the bearing range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fiber processing, in particular to a carbon fiber precursor production hot draft device. BACKGROUND

[0002] The draft device is an indispensable equipment throughout the whole process of carbon fiber precursor spinning, which mainly functions to apply external force to the single fiber in the fiber bundle in the axial direction under certain conditions, to thin the single fiber, improve the orientation degree, and change the plastic state of the single fiber with low strength and high elongation into the elastic state with high strength and low elongation.

[0003] The existing hot draft device is prone to local overheating around the heating pipe and air bubbles when the heating pipe is heated, and the disturbance of the liquid medium and the impact of the air bubbles on the yarn can easily cause the phenomenon of broken yarn and residual yarn.

[0004] According to the hot draft device in the production of carbon fiber precursor in the patent No. CN106637512B, when in use, the 304 stainless steel upper cover hole plate is used, and because the thermal conductivity of stainless steel is much higher than that of water, when the heat transfer of the heating pipe is too high, the heat can be evenly diffused out through the upper cover hole plate, thereby preventing local overheating around the heating pipe and avoiding the phenomenon of boiling yarn, so that the medium temperature is stable and uniform, and the boiling yarn phenomenon cannot be effectively prevented, but only the influence can be reduced. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a carbon fiber precursor production hot draft device to solve the above problems.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a carbon fiber precursor production hot draft device, comprising a bath box and a draft roller arranged on one side of the bath box, the inner cavity of the bath box is divided into a heating groove and a bath groove by a heat conduction plate, the inner cavities of the heating groove and the bath groove are both filled with liquid heat conduction medium, the inner cavity of the heating groove is fixedly connected with a heating rod for heating the liquid heat conduction medium, the inner cavity of the bath groove is fixedly connected with a side baffle, one side of the side baffle is fixedly connected with a sieve plate fixedly connected with the inner cavity of the bath groove, in use, the liquid medium in the heating groove is heated by the heating rod in the heating groove, and then the liquid medium in the bath groove is heat-conducted through the heat conduction plate to heat the precursor, which can effectively prevent local overheating and air bubbles, the disturbance of the liquid medium and the impact of the air bubbles on the yarn, has good heating effect, and is stable in heating, and the fluctuation of the liquid medium can be effectively reduced within the bearable range through the secondary blocking of the sieve plate.

[0007] As a further scheme of the present application: the inner cavity of the bath is fixedly connected with a shielding plate below the original wire, the two sides of the shielding plate are provided with protrusions which are bent upwards to cover the original wire, so that the original wire can be prevented from being impacted by the liquid below while conducting heat.

[0008] As a further scheme of the present application: the surface of the heat-conducting plate is provided with a supplement pipeline which connects the heating tank and the bath, so that the liquid medium in the heating tank can be transported into the bath through the supplement pipeline to supplement the liquid medium in the bath.

[0009] As a further scheme of the present application: the inner cavity of the heating tank is communicated with the inner cavity of the bath through a communication pipeline, a one-way valve is arranged at the connection between the communication pipeline and the bath, and a compression spring valve is arranged at the connection between the communication pipeline and the heating tank, so that when the temperature in the heating tank is too high and the pressure is too large, the compression spring valve is opened, the high-pressure liquid medium in the heating tank can be transported into the bath through the communication pipeline to release pressure, and the liquid medium is blocked by the side baffle to offset the impact, and the one-way valve can prevent the liquid medium in the bath from being transported into the heating tank through the communication pipeline.

[0010] As a further scheme of the present application: the inner cavity of the heating tank is rotatably connected with a spoiler below the side baffle, the spoiler is driven to rotate by the motor, and the water flow is formed below the heating tank to ensure that the liquid medium in the bath is uniformly heated.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] 1. The present application can.

[0013] 2. The present application can. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is an external structure diagram of the present application;

[0015] Fig. 2 It is a structure diagram of the shielding plate of the present application.

[0016] In the figure: 1, bath box; 2, heat-conducting plate; 3, bath; 4, heating tank; 5, heating rod; 6, communication pipeline; 7, compression spring valve; 8, supplement pipeline; 9, side baffle; 10, screen plate; 11, drafting roller; 12, shielding plate; 13, spoiler. DETAILED DESCRIPTION

[0017] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined application purpose, the specific embodiments, structures, features and effects of the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0018] Please refer to Figs. 1-2 The application provides a technical scheme: a carbon fiber precursor production hot draft device, comprising a bath box 1 and a draft roller 11 arranged on one side of the bath box 1, the inner cavity of the bath box 1 is divided into a heating groove 4 and a bath groove 3 by a heat conduction plate 2, the inner cavities of the heating groove 4 and the bath groove 3 are filled with liquid heat conduction medium, the inner cavity of the heating groove 4 is fixedly connected with a heating rod 5 for heating the liquid heat conduction medium, the inner cavity of the bath groove 3 is fixedly connected with a side baffle 9, one side of the side baffle 9 is fixedly connected with a screen plate 10 fixedly connected with the inner cavity of the bath groove 3, in use, the liquid medium in the heating groove 4 is heated by the heating rod 5 in the heating groove 4, and then the liquid medium in the bath groove 3 is heat-conducted through the heat conduction plate 2 to heat the precursor, so that the bubbles generated by local overheating can be effectively prevented, the disturbance of the liquid medium and the impact of the generated bubbles on the filaments can be effectively prevented, the heating effect is good, the heating is stable, and the fluctuation of the liquid medium can be effectively reduced within the bearable range through the secondary blocking of the screen plate 10.

[0019] The inner cavity of the bath groove 3 is fixedly connected with a shielding plate 12 located below the precursor, the two sides of the shielding plate 12 are provided with protrusions bent upwards to cover the precursor, and the liquid below can prevent the precursor from being impacted by the liquid fluctuation.

[0020] The surface of the heat conduction plate 2 is provided with a supplement pipeline 8 connecting the heating groove 4 and the bath groove 3, and the liquid medium in the heating groove 4 is transported into the bath groove 3 by opening the supplement pipeline 8 to supplement the liquid medium in the bath groove 3.

[0021] The inner cavity of the heating groove 4 is communicated with the inner cavity of the bath groove 3 through a communication pipeline 6, a one-way valve is arranged at the connection between the communication pipeline 6 and the bath groove 3, and a compression spring valve 7 is arranged at the communication between the communication pipeline 6 and the heating groove 4, so that when the temperature in the heating groove 4 is too high and the pressure is too large, the compression spring valve 7 is opened, the high-pressure liquid medium in the inner cavity can be transported into the bath groove 3 through the communication pipeline 6 to release pressure, and the liquid medium is blocked by the side baffle 9 to offset the impact, and the one-way valve can prevent the liquid medium in the bath groove 3 from being transported into the heating groove 4 through the communication pipeline 6.

[0022] The inner cavity of the heating groove 4 is rotatably connected with a spoiler 13 located below the side baffle 9, the spoiler 13 is driven to rotate by a motor to form a water flow below the heating groove 4, so that the liquid medium in the bath groove 3 is uniformly heated.

[0023] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A hot drawing apparatus for producing carbon fiber precursor, comprising a bath (1) and a drawing roller (11) disposed on one side of the bath (1), characterized in that: The inner cavity of the bath box (1) is separated by a heat-conducting plate (2) into a heating tank (4) and a bath tank (3). The inner cavities of both the heating tank (4) and the bath tank (3) are filled with a liquid heat-conducting medium. A heating rod (5) for heating the liquid heat-conducting medium is fixedly connected to the inner cavity of the heating tank (4). A side baffle (9) is fixedly connected to the inner cavity of the bath tank (3). A screen plate (10) is fixedly connected to one side of the side baffle (9) and is also fixedly connected to the inner cavity of the bath tank (3). A baffle plate (12) located below the raw yarn is fixedly connected to the inner cavity of the bath tank (3). The shield (12) has protrusions on both sides that bend upwards to cover the raw silk; the surface of the heat-conducting plate (2) is provided with a supplementary pipe (8) that connects the heating tank (4) and the bath tank (3); the inner cavity of the heating tank (4) is connected to the inner cavity of the bath tank (3) through a connecting pipe (6), a one-way valve is provided at the connection between the connecting pipe (6) and the bath tank (3), and a spring valve (7) is provided at the connection between the connecting pipe (6) and the heating tank (4); the inner cavity of the heating tank (4) is rotatably connected to a baffle plate (13) located below the side baffle (9).

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