CN220846375U

CN220846375U - Continuous pre-oxidation equipment for carbon fiber

Info

Publication number: CN220846375U
Application number: CN202322390566.7U
Authority: CN
Inventors: 陈新华; 魏斌; 陈荣华
Original assignee: Jiangsu Mige New Material Co ltd
Current assignee: Jiangsu Mige New Material Co ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-26
Anticipated expiration: 2033-09-04

Abstract

The utility model relates to carbon fiber continuous pre-oxidation equipment, and belongs to the technical field of carbon fiber pre-oxidation. The carbon fiber continuous pre-oxidation equipment comprises a shell, a driving roller rod, a driven roller rod and a heating body, and is characterized in that a plurality of driving roller rods and a plurality of driven roller rods are respectively arranged in a circumferential array in a cavity of the shell, and the driving roller rod and the driven roller rod are arranged at intervals in an up-down staggered manner; the multiple heating bodies are arranged between the driving roller rod and the driven roller rod in a circumferential array; the internal cavity of the shell is divided into different temperature areas according to the heating values of the heating elements; the carbon fiber felt enters the shell, sequentially winds on the driven roller rod and the driving roller rod in a star-shaped path, sequentially passes through different temperature areas to perform continuous pre-oxidation treatment, and is output from the shell after pre-oxidation, cooled and wound by a winding device. The carbon fiber felt is conveyed by adopting a star-shaped path, so that the length of equipment can be reduced, the energy utilization rate can be improved, and the problems of large occupied area and low energy efficiency ratio of the equipment can be solved.

Description

Continuous pre-oxidation equipment for carbon fiber

Technical Field

The utility model relates to carbon fiber continuous pre-oxidation equipment, and belongs to the technical field of carbon fiber pre-oxidation.

Background

The pre-oxidation stage in the existing carbon fiber felt preparation process mainly comprises continuous production, and is mainly characterized in that a mesh belt is used as a conveying carrier to finish corresponding carbon fiber felt conveying operation, different temperature areas are sequentially arranged along the conveying direction of the carbon fiber felt, heating elements are respectively arranged in parallel at the upper and lower positions of the carbon fiber felt, and as the high temperature area is arranged at the rear section of the treatment process, a heat preservation area is additionally arranged at the rear section of the high temperature area, and after the carbon fiber felt passes through the treatment area, a section of natural cooling area is also required to be arranged, so that continuous carbonization treatment of the carbon fiber felt can be realized. But this scheme carbon felt's preliminary oxidation treatment power consumption is great, and the energy efficiency is lower, and equipment area is great, and is higher to the factory building requirement, and the guipure that uses just needs to be changed about three months under the normal condition moreover, has increased and has expended the cost and has also influenced the work efficiency of preliminary oxidation equipment, leads to manufacturing cost higher.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model provides carbon fiber continuous pre-oxidation equipment which can reduce the occupied area of the equipment, reduce the power requirement of the equipment and improve the energy utilization rate.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The continuous carbon fiber pre-oxidation equipment comprises a shell, a driving roller rod, a driven roller rod and a heating body, wherein a plurality of driving roller rods and a plurality of driven roller rods are respectively arranged in a circumferential array in a cavity of the shell, and the driving roller rod and the driven roller rod are arranged at intervals in an up-down dislocation manner; the plurality of heating bodies are arranged between the driving roller rod and the driven roller rod in a circumferential array; the internal cavity of the shell is divided into different temperature areas according to the heating values of the heating elements; the carbon fiber felt enters the shell, sequentially winds on the driven roller rod and the driving roller rod in a star-shaped path, sequentially passes through different temperature areas to perform continuous pre-oxygen treatment, outputs the carbon fiber felt after pre-oxygen to the shell, and is rolled by a rolling device after being cooled.

Further, the inner part of the shell is divided into a front cavity and a rear cavity, and the front cavity is communicated with the rear cavity; an inlet and an outlet are formed in the middle of one side of the front cavity, and the carbon fiber felt passes through the inlet and the outlet to enter and exit the shell.

Further, the horizontal line at the inlet and outlet positions of the shell is used as a central axis to divide the front cavity into an upper part and a lower part, the upper part of the front cavity is a first temperature zone, the lower part of the front cavity is a third temperature zone, the rear cavity is a second temperature zone, a plurality of temperature sensors are arranged in each temperature zone, the temperature range of the first temperature zone is set to be 200-230 ℃, the temperature range of the second temperature zone is set to be 240-255 ℃, and the temperature range of the third temperature zone is set to be 260-280 ℃.

Further, the coke discharging pipes are arranged at the top of the centers of the front chamber and the rear chamber.

Further, an air inlet pipe is arranged at the center of one side of the rear cavity, and inert shielding gas is input into the rear cavity from the air inlet pipe.

Further, an adjusting plate is arranged in the shell, and the adjusting plates are respectively arranged in the connectors among the inlet and outlet, the front chamber and the rear chamber and used for adjusting the opening size of the inlet and outlet exchanged with the outside and the opening size between the front chamber and the rear chamber.

Further, the shell is fixed on the ground through the support column, a natural cooling area is arranged below the shell, and the cooling area is the same as the equipment in length.

Further, a plurality of drive roller stick runs through the casing stiff end, its tip with the double sprocket of casing externally mounted links to each other, and a plurality of double sprocket passes through the chain and connects, one that back cavity horizontal afterbody direction department set up drive roller stick tip with the three rows of sprocket of casing externally mounted links to each other, three rows of sprocket with the motor, double sprocket respectively pass through the chain connection transmission.

Further, the driven roller bars are respectively arranged on the lower side of the outer part of the inlet and outlet of the shell and below the shell, and the carbon fiber felt after the pre-oxidation is led into the natural cooling area of the equipment by the driven roller bars.

Further, the winding device comprises a winding drum and winding rollers, the winding drum is arranged above the two winding rollers which are arranged side by side at intervals, and an output shaft of a motor is connected with a central shaft of the winding drum to drive the winding drum to rotate and wind the carbon fiber felt.

Compared with the prior art, the utility model has the beneficial effects that:

The carbon fiber continuous pre-oxidation equipment disclosed by the utility model can realize continuous pre-oxidation preparation of a carbon fiber felt, has high energy efficiency ratio, solves the problem of large occupied area of the equipment, improves the pre-oxidation production efficiency, and adopts a transportation mode of driving a driving roller rod by a chain wheel to avoid net belt loss, reduce the cost and improve the working efficiency of the pre-oxidation equipment.

The utility model adopts innovative design of star-shaped path and heating body circumference layout for the carbon fiber felt, and combines 3 temperature areas and atmosphere environment requirements of the pre-oxidation treatment requirements, thereby greatly reducing the inner cavity area and the outer shell heat dissipation area which need to be heated, effectively reducing the equipment occupation area and the energy consumption, reducing the consumption of inert protective gas in the production process, simultaneously, the chain wheel drives the driving roller to transmit, avoiding the loss of the mesh belt and reducing the waste of energy.

Drawings

FIG. 1 is a rear view of a carbon fiber continuous pre-oxidation apparatus of the present utility model;

FIG. 2 is a schematic diagram of a front cross-sectional structure of a carbon fiber continuous pre-oxidation apparatus according to the present utility model;

FIG. 3 is a front view of a carbon fiber continuous pre-oxidation apparatus of the present utility model;

FIG. 4 is a left side view of the carbon fiber continuous pre-oxidation apparatus of the present utility model.

Wherein: 1-shell, 1.1-front chamber, 1.2-rear chamber, 2-revolving door, 3-row Jiao Chuguan, 4-motor, 5-heat preservation, 6-driving roller bar, 7-driven roller bar, 8-heating body, 9-winding drum, 10-winding drum, 11-carbon fiber felt, 12-adjusting plate, 13-temperature sensor, 14-double row chain wheel, 15-three rows chain wheel, 16-chain, 17-sealed shield, 18-adjusting hand wheel and 19-air inlet pipe.

Detailed Description

The following detailed description of specific embodiments of the utility model is provided in connection with the accompanying drawings and examples. The following examples are only illustrative of the present utility model and are not intended to limit the scope of the utility model.

Terms of the azimuth or positional relationship of the upper, lower, left, right, inner, outer, front end, rear end, head, tail and the like in the document of the present application are established based on the azimuth or positional relationship shown in the drawings. The drawings are different, and the corresponding positional relationship may be changed, so that the scope of protection cannot be understood.

In the present utility model, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected or detachably connected, integrally connected or mechanically connected, electrically connected or communicable with each other, directly connected or indirectly connected through an intermediate medium, or communicated between two components, or an interaction relationship between two components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 4, the present embodiment provides a carbon fiber continuous pre-oxidation apparatus, which includes a housing 1, wherein two communicating chambers, namely a front chamber 1.1 and a rear chamber 1.2, are provided in the housing 1, and an insulation layer 5 is provided around each chamber, and preferably, an aluminum silicate fiber cotton board is used as the insulation layer 5. The top of two cavities of casing 1 is provided with respectively and discharges burnt exit tube 3 for exhaust gas thing, and the left side of preceding cavity 1.1 is equipped with the access & exit of casing 1, and back cavity 1.2 right side central point puts and sets up intake pipe 19, is used for letting in inert gas to back cavity 1.2. The lower parts of the front chamber 1.1 and the rear chamber 1.2 are supported by support columns.

As shown in fig. 1, a rotary door 2 capable of being opened at two is provided on the rear end surface of a housing 1, and the front end surface thereof is a fixed end. The two-opening revolving door 2 consists of two door leaves, the two door leaves are respectively positioned at the rear ends of the front cavity 1.1 and the rear cavity 1.2, each door leaf can rotate around a rotating shaft arranged in the middle of the rear end face of the shell 1 to open the corresponding cavity, and the inside of the revolving door 2 is closed to form a sealed cavity except for an inlet and an outlet of the shell 1. The horizontal line at the inlet and outlet of the shell 1 is used as a central axis to divide the rear cavity into an upper part and a lower part and divide a temperature zone, the upper part of the front cavity 1.1 is a first temperature zone, the rear cavity 1.2 is a second temperature zone, and the lower part of the front cavity 1.1 is a third temperature zone. The adjusting plate 12 is arranged at the interval between the upper part and the lower part of the cavity, specifically, the adjusting plate 12 is respectively arranged at the inlet and the outlet of the shell 1 and the connecting ports between the two cavities, the rotating shaft of the adjusting plate 12 penetrates through the fixed end of the shell, the adjusting hand wheel 18 connected with the rotating shaft of the adjusting plate 12 is arranged outside the shell 1, and the adjusting plate 12 can be driven to rotate by rotating the adjusting hand wheel 18. The provision of the regulator plate 12 facilitates control of the opening sizes of the outlet and inlet in the doorway and the opening size between the front chamber 1.1 and the rear chamber 1.2.

The driving roller bars 6 are arranged on the circumference of the position, close to the heat insulation layer 5, in the cavity, a plurality of driving roller bars 6 uniformly surround the centers of the front cavity 1.1 and the rear cavity 1.2 respectively, the driving roller bars 6 are not arranged in the vicinity of a connecting port between the inlet and the outlet and between the front cavity and the rear cavity in the horizontal direction, and particularly, the driving roller bars are uniformly arranged at 45-degree circumferential intervals by taking the horizontal direction of the inlet and the outlet as a starting point in the embodiment. The driving roller 6 penetrates through the fixed end of the shell 1, the end of the driving roller is connected with double-row chain wheels 14 arranged outside the shell 1, and the double-row chain wheels 14 are connected through a chain 16. In particular, the end of the driving roller 6 arranged at the tail of the rear chamber 1.2 in the horizontal direction is connected with three rows of chain wheels 15 arranged outside the shell 1, and the three rows of chain wheels 15 are respectively connected with the motor 4 and the double rows of chain wheels 14 for transmission through chains 16. The motor 4 is arranged on the outer side surface of the rear cavity 1.2, and is connected with three rows of chain wheels 15 through a chain 16 to drive the driving roller rod 6 to rotate.

A plurality of driven roller bars 7 are arranged in the cavity along the circumference near the central position in a circumferential array, the driving roller bars 6 and the driven roller bars 7 are arranged in a staggered interval mode up and down, and the driven roller bars 7 are not arranged at intervals reserved between the upper part and the lower part of the carbon fiber felt 11 in the horizontal direction in the cavity. A plurality of heating elements 8 are arranged on the circumference between the driving roller bar 6 and the driven roller bar 7, the heating elements 8 are arranged in a staggered manner along the radial direction of the circumference, preferably, the heating elements 8 are not arranged at the inlet and outlet sides, so that the temperature difference between the inside and outside of the inlet and outlet of the chamber can be reduced, a temperature buffer area for the carbon fiber felt 11 to enter and exit the chamber is formed at the inlet and outlet of the chamber, the working conditions of rapid heating and rapid cooling of the carbon fiber felt 11 are avoided, and the reduction of the product quality is avoided; the heating body 8 is respectively arranged below the driving roller rod 6 and above the driven roller rod 7, the structure can ensure that carbon fiber felts 11 at two sides of the heating body 8 are heated uniformly, the heating body 8 penetrates through the fixed end of the shell 1 and is provided with a sealing protective cover 17 outside the shell, and a plurality of temperature sensors 13 are arranged in each temperature area near the protective cover 17 and used for monitoring the temperature so that the heating body 8 can regulate the temperature conveniently. Two driven roller bars 7 are arranged outside the inlet and outlet of the shell 1, and the two driven roller bars 7 are respectively arranged on the upper side and the lower side of the outside of the shell 1 by taking the horizontal line at the inlet and outlet position as a central axis. The driven roller rod 7 is arranged below the shell 1, the carbon fiber felt 11 bypasses the driven roller rod 7 below to finish reversing, the carbon fiber felt 11 is driven in the horizontal direction in a cooling area below the shell 1, natural cooling is finished in the driving process, and the cooling area is overlapped with the equipment in the length direction. Driven roller bars 7 are respectively arranged on support columns below the shell 1, so that stable transmission of the carbon fiber felt 11 in the horizontal direction is ensured. And a winding device is arranged at the tail end of the equipment and is used for winding the carbon fiber felt 11 after natural cooling.

The winding device comprises winding drums 9 and winding rollers 10, the winding drums 9 are arranged above the two winding rollers 10 which are arranged side by side at intervals, a central shaft of the motor output shaft is connected with the winding drums 9 to drive the winding drums 9 to rotate to wind the carbon fiber felt 11, friction force between the wound carbon fiber felt 11 and the winding rollers 10 drives the winding rollers 10 to rotate, and the carbon fiber felt 11 can ensure the contact area with the winding drums 9 under the action of the winding rollers 10, so that the carbon fiber felt 11 can be wound tightly against the winding drums 9, and winding quality is improved.

The carbon fiber felt 11 is surrounded by a star-shaped path, the driven roller 7 surrounding the upper side outside the inlet and outlet of the shell 1 enters the shell 1, and the driven roller 7 and the driving roller 6 arranged in the first temperature zone, the second temperature zone and the third temperature zone inside the shell 1 are sequentially bypassed, so that the whole surrounding shape of the carbon fiber felt 11 is star-shaped. The heating elements 8 are distributed in small sections which are approximately triangular and formed by the carbon fiber felt 11 and the shell 1, and heat two surfaces of different positions of the carbon fiber felt 11, so that the energy use efficiency is improved.

The carbon fiber continuous pre-oxidation device in the embodiment can adjust the adjusting plate 12 through the adjusting hand wheel 18 according to the size of the carbon fiber felt 11 when in use, so that the carbon fiber felts 11 with different sizes can enter the shell 1 through the inlet and the outlet for continuous pre-oxidation. When the equipment starts to work, the adjusting plate 12 is adjusted to control the opening size of the inlet and outlet, the oxygen exchange balance in the front chamber 1.1 is maintained, meanwhile, the adjusting plate 12 between the front chamber and the rear chamber is adjusted, the opening size between the front chamber and the rear chamber is reduced, and the oxygen in the front chamber 1.1 is prevented from entering the rear chamber 1.2. The air in the rear chamber 1.2 is exhausted by introducing inert shielding gas into the equipment through the air inlet pipe 19, wherein the inert shielding gas is not limited to one or more of nitrogen, carbon dioxide and rare gas, and preferably, nitrogen is selected as the inert shielding gas. Then the heating body 8 enters into a working state, so that the first, second and third temperature areas in the equipment reach the set target temperature, the temperature of the first temperature area is 200-230 ℃, the temperature of the second temperature area is 240-255 ℃, the temperature of the third temperature area is 260-280 ℃, the third temperature area has higher temperature requirement and is arranged below the first temperature area with lower temperature requirement, and the waste heat of the third temperature area can be used for heating the first temperature area above, so that the energy utilization rate is improved. After the temperature sensor 13 detects that the temperature of each temperature zone reaches a set temperature value, the air inlet pipe 19 stops or reduces the input of inert gas, meanwhile, the motor 4 drives the driving roller 6 to rotate, the other motor drives the winding drum 9 to rotate, the driving roller 6 mainly provides transmission power for the carbon fiber felt 11 in the equipment, and the winding drum 9 mainly provides traction for the carbon fiber felt 11 outside the equipment. The carbon fiber felt 11 enters a first temperature zone of equipment under the action of a driving roller rod 6 and a winding drum 9 to be subjected to primary oxidation in air, the treatment time is 5-10 minutes, the carbon fiber felt 11 moves into a second temperature zone to be cyclized in a low-oxygen environment, the treatment time is 10-15 minutes, the cyclized carbon fiber felt 11 is introduced into a third temperature zone to be subjected to high-temperature oxidation in the air, the treatment time is 5-10 minutes, the carbon fiber felt 11 after pre-oxidation is carried on a driven roller rod 7 at the lower side of an entrance and the outlet in sequence, the reversing of the carbon fiber felt 11 is completed on the driven roller rod 7 below the shell 1, natural cooling is performed below the shell 1, and finally a winding device winds a finished product of the carbon fiber felt 11 after natural cooling.

While the principles of the utility model have been described in detail in connection with the preferred embodiments thereof, it should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the implementations of the utility model and are not intended to limit the scope of the utility model. The details of the embodiments are not to be taken as limiting the scope of the utility model, and any obvious modifications based on equivalent changes, simple substitutions, etc. of the technical solution of the utility model fall within the scope of the utility model without departing from the spirit and scope of the utility model.

Claims

1. The carbon fiber continuous pre-oxidation equipment comprises a shell (1), a driving roller rod (6), a driven roller rod (7) and a heating body (8), and is characterized in that a plurality of driving roller rods (6) and a plurality of driven roller rods (7) are respectively arranged in a circumferential array in a cavity of the shell (1), and the driving roller rod (6) and the driven roller rods (7) are arranged at intervals in an up-down dislocation mode; a plurality of heating elements (8) are arranged in a circumferential array between the driving roller bar (6) and the driven roller bar (7); the internal cavity of the shell (1) is divided into different temperature areas according to the heating values of the heating elements (8); the carbon fiber felt (11) enters the shell (1) and sequentially winds on the driven roller rod (7) and the driving roller rod (6) in a star-shaped path, and sequentially passes through different temperature areas to be subjected to continuous pre-oxidation treatment, and the carbon fiber felt (11) after pre-oxidation is output from the shell (1) and is wound by a winding device after being cooled.

2. The carbon fiber continuous pre-oxidation apparatus according to claim 1, wherein the housing (1) is internally divided into a front chamber (1.1) and a rear chamber (1.2), the front chamber (1.1) and the rear chamber (1.2) being communicated; an inlet and an outlet are formed in the middle of one side of the front cavity (1.1), and the carbon fiber felt (11) enters and exits the shell (1) through the inlet and the outlet.

3. The carbon fiber continuous pre-oxidation device according to claim 2, wherein a horizontal line at the inlet and outlet positions of the shell (1) is used as a central axis to divide the front chamber (1.1) into an upper part and a lower part, the upper part of the front chamber (1.1) is a first temperature zone, the lower part of the front chamber (1.1) is a third temperature zone, the rear chamber (1.2) is a second temperature zone, a plurality of temperature sensors (13) are arranged in each temperature zone, the temperature range of the first temperature zone is set to be 200-230 ℃, the temperature range of the second temperature zone is set to be 240-255 ℃, and the temperature range of the third temperature zone is set to be 260-280 ℃.

4. The carbon fiber continuous pre-oxidation apparatus according to claim 2, wherein the front chamber (1.1) and the rear chamber (1.2) are each provided with a coke discharge pipe (3) at the top of the chamber center.

5. The carbon fiber continuous pre-oxidation device according to claim 2, wherein an air inlet pipe (19) is arranged at the center of one side of the rear chamber (1.2), and inert shielding gas is input into the rear chamber (1.2) from the air inlet pipe (19).

6. The carbon fiber continuous pre-oxidation apparatus according to claim 2, wherein an adjusting plate (12) is provided inside the housing (1), and the adjusting plate (12) is provided in connection ports between the inlet and outlet, the front chamber (1.1) and the rear chamber (1.2) respectively for adjusting an opening size of the inlet and outlet exchanged with the outside, and an opening size between the front chamber (1.1) and the rear chamber (1.2).

7. The carbon fiber continuous pre-oxidation device according to claim 1, wherein the shell (1) is fixed on the ground through a support column, and a natural cooling area is arranged below the shell (1), and the cooling area is the same as the device in length.

8. The carbon fiber continuous pre-oxidation device according to claim 2, wherein a plurality of driving rollers (6) penetrate through the fixed end of the shell (1), the end parts of the driving rollers are connected with double-row chain wheels (14) installed outside the shell (1), the double-row chain wheels (14) are connected through chains (16), one end part of the driving rollers (6) arranged in the horizontal tail direction of the rear cavity (1.2) is connected with three-row chain wheels (15) installed outside the shell (1), and the three-row chain wheels (15) are respectively connected with a motor (4) and the double-row chain wheels (14) for transmission through the chains (16).

9. The continuous carbon fiber pre-oxidation device according to claim 1, wherein the driven roller bars (7) are respectively arranged at the lower side of the outer part of the inlet and outlet of the shell (1) and below the shell (1), and the carbon fiber felt (11) subjected to pre-oxidation is led into a natural cooling area of the device by bypassing the driven roller bars (7).

10. The carbon fiber continuous pre-oxidation device according to claim 1, wherein the winding device comprises a winding drum (9) and winding rollers (10), the winding drum (9) is arranged above the two winding rollers (10) which are arranged side by side at intervals, and an output shaft of a motor is connected with a central shaft of the winding drum (9) to drive the winding drum (9) to rotate and wind the carbon fiber felt (11).