CN114836846A - Fiber heat treatment device - Google Patents

Abstract

The invention discloses a fiber heat treatment device, which belongs to the technical field of heat treatment and comprises a heating furnace body, a furnace tube, a jacket, a heating tube and a gas distribution device, wherein the furnace tube, the jacket and the heating tube are all arranged in an installation cavity in the heating furnace body, and a channel for conveying fiber tows is arranged in the furnace tube; the jacket is sleeved outside the furnace tube, and soaking materials are filled between the jacket and the furnace tube; the heating pipe is positioned outside the jacket; the gas distribution device is fixedly connected to one end of the heating furnace body and comprises a protective gas device, and the protective gas device can convey protective gas with different flow rates and temperatures into the furnace tube. Through the structure, the protective gas can be independent, the temperature and the flow of the protective gas can be independently adjusted, and the conditions of high temperature, uniform temperature and effective impurity blowing are provided for fiber heat treatment; moreover, the risk of leakage and falling of the soaking material is eliminated, and the reliability of the whole device is improved.

Description

Fiber heat treatment device

Technical Field

The invention relates to the technical field of heat treatment, in particular to a fiber heat treatment device.

Background

In the fiber spinning manufacturing process, the fiber needs to be stretched at a certain temperature and in a certain atmosphere, and the strength of the fiber is improved by increasing the orientation degree of the fiber. The property of the fiber changes depending on the temperature of the heat treatment, so that the fiber heat treatment device belongs to a key device, and the high temperature and the temperature uniformity of a thermal field must be ensured. The heat treatment of fiber at present generally adopts a process method that the fiber passes through a high-temperature channel at a certain speed and draft under the protection of inert gas.

In the prior art, inert gas is generally introduced from the middle of a furnace tube and is vertical to fibers, and the fiber tows are impacted due to the high air flow velocity, so that the fibers are easy to break. In addition, the gas in the middle of the furnace tube freely flows towards the fiber inlet and the fiber outlet, the flow is uncontrollable, and the atmosphere is disordered. When the inert gas is introduced into the furnace tube from the inlet and outlet ends of the furnace tube, part of the inert gas needs to be dispersed outside the inlet and outlet of the furnace tube to play a role in preventing the outside gas from entering the furnace tube, and part of the inert gas enters the furnace tube to provide a certain atmosphere for fiber heat treatment.

In addition, in the prior art, a high-temperature molten salt system is generally adopted to control the temperature in the furnace pipe, that is, molten salt is adopted as a heat-conducting medium to realize temperature regulation and control. However, the high-temperature molten salt system has the defects of complex system and low reliability, and is easy to generate the risk of leakage; easy to solidify and block, needs to be replaced after long-term use and decomposition, and generates a large amount of solid wastes. And the replacement is complicated, and the operation difficulty of workers is increased.

In view of the above, a fiber heat treatment device is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a fiber heat treatment device which not only can provide high temperature and uniform temperature required by heat treatment and effective impurity blowing conditions for fiber tows, but also eliminates the risk of leakage and falling of soaking materials and improves the reliability of the whole device.

In order to achieve the purpose, the invention adopts the following technical scheme:

a fiber heat treatment apparatus, comprising:

the heating furnace body is provided with an installation cavity;

the furnace tube is arranged in the mounting cavity, and a channel for conveying fiber tows is formed in the furnace tube;

the jacket is arranged in the installation cavity and sleeved outside the furnace tube, and soaking materials are filled between the jacket and the furnace tube;

the heating pipes are arranged in the mounting cavity and positioned on the outer side of the jacket;

the gas distribution device is fixedly connected to one end of the heating furnace body and comprises a protective gas device, and the protective gas device is used for conveying protective gases with different flow rates and temperatures.

Optionally, the shielding gas device comprises a shielding gas preheater and a first flow regulating valve which are communicated, the shielding gas preheater is used for preheating the shielding gas, and the first flow regulating valve is used for regulating the flow of the shielding gas.

Optionally, the cover gas device still includes cover gas distribution main pipe group and cover gas conveyer pipe, cover gas distribution main pipe group sets up at least a set of, every group cover gas distribution main pipe group all include upper and lower symmetry set up in the cover gas distribution main pipe of fibre silk bundle both sides, and two of every group cover gas distribution main pipe's both ends all communicate in the export of cover gas pre-heater, the through-hole of intercommunication cover gas conveyer pipe has been seted up on the cover gas distribution main pipe, the cover gas conveyer pipe can be carried the cover gas and advanced in the stove is intraductal.

Optionally, the gas distribution device further includes a gas sealing device, the gas sealing device is fixedly disposed in the gas distribution device, the gas sealing device includes a pair of sealing gas distribution header pipes and a plurality of sealing gas nozzles communicated to the header pipes, the pair of sealing gas distribution header pipes are disposed on two sides of the fiber tows, and a pair of sealing gas sprayed from the sealing gas nozzles on the sealing gas distribution header pipes jointly forms a sealing gas curtain.

Optionally, a plurality of groups of cavity-dividing partition plates which are arranged on two sides of the fiber in pairwise symmetry are arranged in the air sealing device, and two adjacent groups of cavity-dividing partition plates form a cavity for mounting the air sealing device.

Optionally, the fiber heat treatment device further comprises an inlet box body, the inlet box body is arranged at the inlet end of the heating furnace body, and the fiber tows can sequentially enter the furnace tube through the inlet box body and the inlet end of the heating furnace body.

Optionally, the fiber tow heat treatment device further comprises a first baffle plate, the first baffle plate is installed at the outlet end of the gas distribution device, and the first baffle plate can move up and down to adjust the size of the outlet end of the gas distribution device;

and/or the fiber tow heat treatment device further comprises a second baffle plate, the second baffle plate is installed at the inlet end of the inlet box body, and the second baffle plate can move up and down to adjust the height and the opening width of the inlet end of the inlet box body.

Optionally, the fiber heat treatment device further comprises a jacket exhaust pipe, wherein one end of the jacket exhaust pipe is communicated with the inner cavity of the jacket, and the other end of the jacket exhaust pipe extends out of the heating furnace body.

Optionally, the gas distribution device is disposed at an outlet end of the heating furnace body.

Optionally, the soaking material is a solid heat storage material.

Compared with the prior art, the invention has the beneficial effects that: the fiber heat treatment device comprises a furnace tube for fiber tows to carry out heat treatment and a jacket tightly sleeved on the outer wall of the furnace tube, wherein a soaking material capable of coating the whole furnace tube in an installation cavity is filled between the jacket and the furnace tube, the installation cavity is internally provided with a plurality of heating tubes fixedly connected with the outer side of the jacket and a gas distribution device fixedly connected with one end of a heating furnace body, and the gas distribution device comprises a protective gas device independent of protective gas. After the heat of the heating pipe is transferred to the soaking material by the jacket, the soaking material can store the heat and uniformly arrange the heat on the outer wall of the furnace pipe; and the gas distribution device can independently come out the protective gas, so that the flow and the temperature of the protective gas can be independently adjusted, the flow and the temperature of the protective gas can meet the requirements of fiber heat treatment, and the whole fiber heat treatment device has the conditions of high temperature, uniform temperature and effective impurity blowing. In addition, the jacket can tightly seal the soaking material on the furnace tube, so that components on the soaking material are prevented from falling off from the joint of the jacket and the furnace tube and leaking into the heating furnace body after long-time work, other parts in the heating furnace body can be protected, and the reliability of the device is improved.

Drawings

FIG. 1 is a schematic structural view of a fiber heat treatment apparatus according to the present invention;

FIG. 2 is a flow chart of a protective gas delivery of the fiber heat treatment apparatus proposed in the present invention;

FIG. 3 is a flow chart of the seal gas supply of the apparatus for heat-treating fibers according to the present invention.

In the figure:

1. heating the furnace body; 11. a mounting cavity; 12. a housing; 13. a heat insulating portion; 14. a first thermometer;

2. a furnace tube;

3. a jacket;

4. soaking material

5. Heating a tube;

6. a gas distribution device;

61. a shielding gas device; 611. a shielding gas distribution header; 612. a protective gas delivery pipe; 613. a first conduit; 614. a shielding gas preheater; 615. a second thermometer; 616. a first flow regulating valve; 617. a first flow meter;

62. an air-tight sealing device; 621. a cavity separation plate; 622. sealing the gas distribution header; 623. sealing the gas nozzle; 624. a second pipe; 625. a second flow regulating valve; 626. a second flow meter;

7. an inlet box body;

8. a jacket exhaust pipe;

9. a first baffle plate;

10. a second baffle.

Detailed Description

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the prior art, inert gas is generally introduced from the middle of a furnace tube and is vertical to fibers, and the fiber tows are impacted due to the high air flow velocity, so that the fibers are easy to break. In addition, the gas in the middle of the furnace tube freely flows towards the fiber inlet and the fiber outlet, the flow is uncontrollable, and the atmosphere is disordered.

When the inert gas is introduced into the furnace tube from the inlet and outlet ends of the furnace tube, part of the inert gas needs to be dispersed outside the inlet and outlet of the furnace tube to play a role in preventing the outside gas from entering the furnace tube, and part of the inert gas enters the furnace tube to provide a certain atmosphere for fiber heat treatment.

In addition, in the prior art, a high-temperature molten salt system is generally used for providing high-temperature and uniform-temperature environments for the heat treatment process of the fibers, but the heat supply system is complex, the cost of the whole device is increased, and after the high-temperature molten salt system is used for a long time, the high-temperature molten salt system has the risk of leakage and low reliability.

Therefore, the embodiment provides a fiber heat treatment device, which not only can provide the required high-temperature and uniform-temperature environmental conditions for the fiber heat treatment process, but also can avoid the risk of leakage generated by the existing high-temperature molten salt system, so that the whole fiber heat treatment device has reliability.

Referring to fig. 1 to 3, the fiber heat treatment apparatus of the present embodiment includes a heating furnace body 1, a furnace tube 2, a jacket, and a heating tube 5. Wherein, the heating furnace body 1 is internally provided with a mounting cavity 11; the furnace tube 2 is fixedly arranged in the mounting cavity 11 in a penetrating way; the jacket is sleeved on the furnace tube 2, and the jacket is filled with a soaking material 4 capable of absorbing heat in advance; the heating pipe 5 is installed in the installation cavity 11 and is positioned outside the jacket 3, so that the heat emitted from the heating pipe 5 can be absorbed by the soaking material 4 through the jacket 3. The soaking material 4 completely covers the furnace tube 2 in the installation cavity 11 through the jacket 3, and the soaking material 4 can uniformly spread the absorbed heat on the outer wall of the furnace tube 2, so that the purpose that the surface of the furnace tube 2 has uniform temperature is achieved, and the jacket 3 can be tightly attached and connected with the furnace tube 2, so that the soaking material 4 is prevented from leaking from the joint of the jacket 3 and the furnace tube 2, other components in the heating furnace body 1 are protected, and the reliability of the fiber heat treatment device is improved.

Furthermore, the soaking material 4 is made of a solid heat storage material, the solid heat storage material has good heat conduction performance, the heat of the heating pipe 5 can be uniformly distributed on the whole furnace pipe 2, and the soaking furnace has the advantages of reliable installation, no decomposition, long service life and no environmental pollution. It is understood that the present invention does not limit the type of material used for the soaking material 4, and it is within the protection scope of the present invention as long as it has good heat conduction performance, is reliable in installation, is not easily decomposed, has a long service life, and has no problem of environmental pollution.

Optionally, the heating furnace body 1 includes a shell and a heat insulation portion, and a fiber tow outlet end and a fiber tow inlet end are symmetrically provided at two ends of the shell, respectively, so that two ends of the furnace tube 2 are fixedly connected at the fiber tow outlet end and the fiber tow inlet end, respectively. The heat insulation part is placed in boiler tube 2's both sides and pastes and establish on the inner wall of shell, has in the inside of heat insulation part to set up above-mentioned installation cavity 11 for heat in the heating pipe 5 can be full in whole installation cavity 11, also makes the heat in the heating pipe 5 can be isolated by heat insulation part before transmitting the shell, and the shell of having avoided heating furnace body 1 has higher temperature, has improved the security of fibre silk bundle heat treatment in-process.

Further, still be provided with first thermometer in the bottom of shell, the probe of first thermometer can stretch into heating furnace body 1 inside and laminate on the outer wall that presss from both sides cover 3 to be convenient for detect the temperature condition of cavity, later according to the temperature condition that detects, adjust the temperature in the cavity through heating pipe 5 again, avoided the temperature in the cavity too high or cross lowly, lead to the too high or cross lowly of temperature in the boiler tube 2, thereby influenced fibrous thermal treatment efficiency and yield.

With continued reference to fig. 1, a channel for the fiber tows to move is formed in the furnace tube 2, the fiber tows can pass through the channel and enter and exit the heating furnace body 1, and two ends of the furnace tube 2 can be fixedly connected with the heating furnace body 1 in a welding, riveting or bolt connection manner, so that the stability of the furnace tube 2 is improved. It can be understood that the cross section of the furnace tube 2 can be annular, for example, it can be circular or square annular, so as to meet the requirements for the cross-sectional shape of the furnace tube 2 when processing fibers with different specifications; the number of the furnace tubes 2 can be single or a plurality of furnace tubes, so that the requirement for the number of the heating furnace tubes 2 during the treatment of fibers with different scales is met, and the sectional shape and the number of the heating tubes 5 are within the protection scope of the invention as long as the fiber tows can be subjected to heat treatment.

Continuing to refer to fig. 1, the jacket 3 is disposed in the installation cavity 11, the jacket 3 is cylindrical and can be sleeved on the outer wall of the furnace tube 2, and two ends of the jacket 3 are abutted to two ends of the heat insulation portion along the length direction of the furnace tube 2, so that the furnace tube 2 in the installation cavity 11 can be completely covered by the jacket 3. Further, a jacket exhaust pipe 8 is formed by extending the jacket wall of the jacket 3 outwards, and the jacket exhaust pipe 8 can sequentially penetrate through the installation cavity 11, the heat insulation part and the shell and is arranged outside the heating furnace body 1, so that after the soaking material 4 is heated and expanded, a part of the expanded soaking material can enter the jacket exhaust pipe 8, and the damage of the expanded soaking material 4 to the jacket 3 and the furnace tube 2 is reduced. In addition, after absorbing heat, volatile substances (such as water, air and the like) adsorbed by the soaking material 4 can be volatilized to the outside through the jacket exhaust pipe 8, and the phenomenon that gas is trapped between the jacket 3 and the furnace tube 2 to damage the furnace tube 2 and the jacket 3 is also avoided.

Furthermore, the number of the jacket exhaust pipes 8 is several, the jacket exhaust pipes 8 are equidistantly arranged on the same side of the jacket 3, and by setting the plurality of jacket exhaust pipes 8, the steam in the whole part of the soaking material 4 can be discharged out of the heating furnace body 1 from the jacket exhaust pipes 8, so that the protection of the whole device is improved, and the reliability is improved. It is understood that the number of the jacket exhaust pipes 8 is not limited by the invention, and the invention is within the protection scope as long as the soaking material 4 in the jacket 3 can be heated without damaging the jacket 3 and the furnace tube 2.

With continued reference to fig. 1, the heating pipes 5 are located outside the jacket 3 and are fixedly installed in the installation cavity 11, and the heating temperature of the heating pipes 5 is regulated to change the tensile properties of the fiber tows, so as to obtain fibers with properties required under different working conditions. And, through the heating of heating pipe 5, its heat can be passed through jacket 3 and transmitted to soaking material 4, utilize soaking material 4 to heat furnace tube 2, provide the condition of high temperature for the thermal treatment of fibre silk bundle.

Optionally, referring to fig. 1, the fiber heat treatment apparatus further includes a gas distribution apparatus 6 fixedly disposed at an outlet end of the heating furnace body 1, the gas distribution apparatus 6 is capable of delivering shielding gas and sealing gas, the shielding gas is capable of entering the furnace tube 2, and a stable atmosphere is provided for the fiber tow heat treatment; the sealing gas forms a sealing gas curtain to prevent the fiber tows in the fiber heat treatment device from being oxidized during the fiber tow conveying process. Furthermore, the two ends of the gas distribution device 6 are provided with an inlet end and an outlet end for the fiber tows to enter and exit, a channel for the fiber tows to pass through is formed in the gas distribution device 6, the inlet end of the gas distribution device 6 is communicated with the outlet end of the heating furnace body 1, and the fiber tows conveyed out of the outlet end of the heating furnace body 1 can be stored in or drawn out of the gas distribution device 6 through the channel.

Specifically, the gas distribution device 6 includes a shielding gas device 61 and a gas sealing device 62. Wherein, the shielding gas device 61 is arranged near the outlet end of the heating furnace body 1, and the shielding gas device 61 is used for providing preheated shielding gas into the heating furnace body 1; the air sealing device 62 is adjacent to the protective gas device 61 and far away from the outlet end of the heating furnace body 1, and is used for preventing the outside air from entering the furnace tube 2 from the gas distribution device 6. The gas distribution device 6 can not only provide stable atmosphere required by the heat treatment of the fiber tows in the furnace tube 2, but also prevent the outside air from entering the furnace tube 2, prevent the fiber tows in the furnace tube 2 from being oxidized by the outside air and protect the fiber tows. It should be noted that, in the present invention, the gas in the gas distribution device 6 is an inert gas.

Optionally, the gas distribution device 6 further comprises a pair of first baffles 9, the pair of first baffles 9 is movably arranged at the outlet end of the gas distribution device 6, and the size of the outlet end of the gas distribution device 6 can be adjusted by moving the baffles up and down relatively, so that on one hand, fiber tows with different specifications can all leave from the gas distribution device 6; on the other hand, before the fiber tows leave the gas distribution device 6, the first baffle 9 can close the outlet end of the gas distribution device 6, so that the condition that the outside air enters the gas distribution device 6 from the outlet end of the gas distribution device 6 is effectively avoided, and the risk that the fiber tows in the gas distribution device 6 are oxidized by the outside air is avoided.

Referring to fig. 1 and 2, the shielding gas device 61 includes a shielding gas distribution header pipe 611, a shielding gas delivery pipe 612, a first pipe, a shielding gas preheater 614, a second thermometer, a first flow rate adjustment valve 616, and a first flow meter. Wherein, the shielding gas distribution header pipe 611 is fixedly installed at the inlet end of the gas distribution device 6 and close to the outlet end of the heating furnace body 1; one end of the shielding gas delivery pipe 612 is fixedly connected to the shielding gas distribution header pipe 611, the other end can extend into the furnace tube 2, and at least part of the shielding gas delivery pipe 612 is parallel to the inner wall of the furnace tube 2; the first pipeline is installed outside the gas distribution device 6 and connected to two ends of the shielding gas distribution main pipe 611; the shielding gas preheater 614, the second thermometer, the first flow regulating valve 616, and the first flow meter are all disposed on the first pipe. Through this protective gas device 61, can preheat the protective gas of certain flow to in sending into furnace tube 2 the protective gas after will preheating, provide stable atmosphere for in the furnace tube 2, and guarantee that the temperature in the furnace tube 2 is even, be favorable to the heat treatment process of fibre silk bundle.

Further, the shielding gas distribution header pipes 611 may have a plurality of pairs, each pair of the shielding gas distribution header pipes 611 is sequentially arranged, and the two shielding gas distribution header pipes 611 of each pair are respectively and vertically symmetrically arranged at two sides of the channel in the gas distribution device 6, so that the spaces at the upper and lower sides of the fiber tows are both filled with the shielding gas, and the flow demand of the shielding gas in the heat treatment process of the fiber tows of different specifications in the furnace tube 2 is also satisfied.

Furthermore, the protective gas distribution main pipe 611 is provided with a through hole communicated with the protective gas conveying pipe 612, the protective gas conveying pipe 612 can convey the preheated protective gas in the protective gas distribution main pipe 611 into the furnace tube 2 through the through hole and the protector conveying pipe, so that the flow path of the protective gas is parallel to the movement path of the fiber tows, and the protective gas is prevented from blowing the fiber tows; and the protective gas flows out from the inlet end of the heating furnace body 1, so that the protective gas flowing into the furnace tube 2 can blow away impurities and water vapor mixed on the surfaces of the two sides of the fiber tows, and the heat treatment efficiency and the yield of the fiber tows are improved.

One end of the first pipeline is used for entering the shielding gas, and the other end of the first pipeline can be communicated with two ends of the shielding gas distribution header pipe 611, so that the shielding gas with a desired flow value and a certain temperature after being regulated and controlled can be delivered into the shielding gas distribution header pipe 611.

The shielding gas preheater 614 is used for heating the shielding gas in the first pipeline, the second thermometer can detect the temperature value of the preheated shielding gas, the temperature of the shielding gas is kept at a designed value through the detection of the second thermometer and the regulation and control of the shielding gas preheater 614, and then the preheated shielding gas is conveyed into the shielding gas distribution header pipe 611, so that the uniform temperature in the furnace tube 2 is ensured, and the heat treatment process of the fiber tows is not influenced.

The first flow meter is used for detecting the flow of the shielding gas which is just conveyed into the first pipeline, and when the flow of the shielding gas exceeds a preset value, the first flow regulating valve 616 can regulate and control the flow of the shielding gas to the preset value; otherwise, the flow of the shielding gas is increased until a preset shielding gas flow value is reached, and then flows through the shielding gas preheater 614 via the first flow regulating valve 616. Therefore, the flow of the protective gas flowing into the furnace tube 2 can be controlled to be in a preset value, and the phenomenon that the fiber tows are blown down due to overlarge flow of the protective gas is avoided; or the flow of the protective gas is prevented from being too small, the continuous and stable atmosphere cannot be provided for the heat treatment process of the fiber tows, and impurities and water vapor mixed on the fiber tows cannot be blown away.

As shown in fig. 1 and 3, the gas sealing device 62 includes a chamber partition 621, a sealing gas distribution manifold 622, a sealing gas nozzle 623, a second pipe, a second flow regulating valve, and a second flow meter. Wherein, the sub-cavity partition 621 is fixedly connected to the inner wall of the gas distribution device 6 and is arranged between the outlet end of the gas distribution device 6 and the shielding gas distribution header pipe 611; the sealed air distribution manifold 622 is fixedly arranged in a cavity formed by two adjacent cavity partition plates 621; a seal gas nozzle 623 is fixedly connected to the seal gas distribution header 622; the second pipeline is installed outside the gas distribution device 6 and connected to both ends of the seal gas distribution header 622; the second flow regulating valve and the second flow meter are both arranged on the second pipeline. The air sealing device 62 can prevent outside air from entering the furnace tube 2 from the air distribution device 6, protect the fiber tows in the heat treatment process from being oxidized by the outside air, and improve the yield of the fiber tows after heat treatment.

The cavity dividing partition boards 621 can be provided with a plurality of pairs, and each pair of cavity dividing partition boards 621 are distributed on two sides of the channel in the gas distribution device 6 up and down in pairwise symmetry, so that the outside air can be effectively prevented from entering the furnace tube 2 from the gas distribution device 6. It is understood that the invention is not limited to the number of the dividing partitions 621, nor to the dividing partitions 621 being located on both sides or only one side of the channel of the gas distribution device 6, and it is within the scope of the invention to have the gas ejected from the sealing gas nozzles 623 in the gas distribution device 6 and block the outside air from entering the furnace tube 2.

Correspondingly, the sealing gas distribution header pipes 622 can also have a plurality of pairs, and each pair of the sealing gas distribution header pipes 622 is vertically distributed in the cavity formed by two adjacent pairs of cavity partition plates 621, so that the sealing gas delivered into the gas distribution device 6 flows in the path formed by the vertically opposite cavities, and the risk that the fiber tows are blown out due to the cross flow of the sealing gas in different cavities is avoided.

The sealing gas nozzles 623 can also be provided with a plurality of pairs, the outlets of the sealing gas nozzles 623 are opposite and are perpendicular to the moving direction of the fiber tows, so that the sealing gas flow sprayed out of the outlets of the sealing gas nozzles 623 can be perpendicular to the moving direction of the fiber tows, the sealing gas flow sprayed out of the sealing gas nozzles 623 oppositely arranged in each cavity forms a gas curtain, the formed gas curtain realizes the blocking of the air sealing device 62 to the outside air, and the fiber tows are prevented from being oxidized by the outside air.

One end of the second pipeline is used for entering the sealing gas, and the other end of the second pipeline can be communicated with two ends of the sealing gas distribution header 622, so that the sealing gas with a certain flow value and subjected to regulation and control can be conveyed into the sealing gas distribution header 622.

The second flow meter is used for detecting the flow of the sealing gas which is just conveyed into the second pipeline, the second flow regulating valve is used for regulating and controlling the flow of the sealing gas, and the use principle of the second flow meter and the second flow regulating valve is the same as that of the first flow meter and the first flow regulating valve 616. Therefore, the flow of the sealing gas in the gas distribution device 6 can be regulated and controlled, so that a gas curtain can be formed, the outside air is effectively prevented from entering, and the fiber tows are prevented from being cut and damaged due to the fact that the flow of the sealing gas is too large.

Optionally, the fiber heat treatment device further includes an inlet box 7 fixedly disposed at the inlet end of the heating furnace body 1, two ends of the inlet box 7 are also provided with an inlet end and an outlet end for the fiber tows to enter and exit, and a channel for the fiber tows to pass through is formed in the inlet box 7, the outlet end of the inlet box 7 is communicated with the inlet end of the heating furnace body 1, so that the fiber tows can enter the furnace tube 2 through the inlet box 7.

Further, the inlet box body 7 comprises a pair of second baffles 10, and the second baffles 10 are movably arranged on the upper side and the lower side of the inlet end of the inlet box body 7 and can move up and down, so that the height and the opening width of the inlet end of the inlet box body 7 can be adjusted, and the inlet box body can adapt to the entering of fiber tows with different specifications; on the other hand, after the fiber tows enter the inlet box body 7, the second baffle 10 can close the inlet end of the inlet box body 7, so that the external air is effectively prevented from entering the furnace tube 2 from the inlet end of the inlet box body 7, and the risk that the fiber tows are oxidized by the external air is avoided.

In this embodiment, the fiber tows may be aramid fibers, and when the fiber tows are the aramid fibers, the cross-sectional shape of the furnace tubes 2 is a circular shape, the diameter of the furnace tubes may be 30mm, the total length of the furnace tubes 2 may be 9m, the number of the furnace tubes 2 may be 12, and the 12 furnace tubes 2 are arranged in parallel along the width direction of the heating furnace body 1. The number of jacket exhaust pipes 8 set may be 3, and all arranged on one side of the jacket 3. The number of the heating pipes 5 is set to 72 pairs, every 4 pairs of the heating pipes 5 are set to 5 groups of heating pipes, and 18 groups of the heating pipes 5 are symmetrically arranged on the upper side and the lower side of the jacket 3 and arranged along the length direction of the heating furnace body 1. The heating furnace body 1 is provided with 18 temperature zones, 5 groups of heating pipes correspond to one temperature zone, and the length of each temperature zone is 0.5 m. The temperature setting range of the heating pipe 5 is 350-500 ℃, so that a proper temperature is provided for the heat treatment of the aramid fiber; correspondingly, the temperature of the shielding gas preheater 614 is set to range from 350 ℃ to 500 ℃. And 18 first thermometers are equidistantly arranged along the length direction of the heating furnace body 1, and each thermometer is used for detecting the temperature condition corresponding to each temperature zone, so that the detection and the regulation of the temperature condition of the whole furnace tube 2 are realized. The number of the protective gas distribution header pipes 611 is 2, and 8 protective gas conveying pipes 612 are uniformly distributed on each protective gas distribution header pipe 611 and are respectively arranged corresponding to 8 furnace tubes 2. The number of the dividing partition boards 621 is set to 3 pairs, the outlet end of the gas distribution device 6 and the 3 pairs of dividing partition boards 621 are mutually matched to form 3 chambers, and each chamber is internally provided with a pair of sealing gas distribution header pipes 622. In this embodiment, the soaking material 4 is a mafic brick, and the heat insulating material used in the heat insulating part is an alumina silicate fiber blanket.

In some other embodiments, the fiber tows can also be carbon fibers, and when the fiber tows are carbon fibers, the cross-sectional shape of the furnace tube 2 is a square shape, the cross-sectional dimension is 800mm × 80mm, and the total length of the furnace tube 2 is 4 m. The number of jacket exhaust pipes 8 is set to 2, and they are arranged on one side of the jacket 3. The number of the heating pipes 5 is set to 16 pairs, and each 4 pairs of the heating pipes 5 are set to 5 groups of heating pipes, and the 4 groups of the heating pipes 5 are symmetrically arranged at the upper side and the lower side of the jacket 3 and are arranged along the length direction of the heating furnace body 1. The temperature of the heating pipe 5 is set to be 150-300 ℃, so that a proper temperature is provided for the heat treatment of the carbon fiber; correspondingly, the temperature of the shielding gas preheater 614 is set to be in the range of 150 ℃ to 300 ℃. Along the length direction of the heating furnace body 1, 4 first thermometers are arranged, which function as the first thermometers when the aramid fibers are heat-treated. The number of the dividing partition boards 621 is set to 3 pairs, the outlet end of the gas distribution device 6 and the 3 pairs of dividing partition boards 621 are mutually matched to form 3 chambers, and each chamber is internally provided with a pair of sealing gas distribution header pipes 622. In this embodiment, the soaking material 4 is made of ceramic grains, and the heat insulating material used in the heat insulating portion is a rock wool blanket.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A fiber heat treatment apparatus, comprising:

the heating furnace comprises a heating furnace body (1), wherein the heating furnace body (1) is provided with an installation cavity (11);

the furnace tube (2) is arranged in the installation cavity (11), and a channel for conveying fiber tows is formed in the furnace tube (2);

the jacket (3) is arranged in the installation cavity (11) and sleeved outside the furnace tube (2), and a soaking material (4) is filled between the jacket (3) and the furnace tube (2);

the heating pipes (5) are arranged in the mounting cavity (11) and positioned on the outer side of the jacket (3);

the gas distribution device (6), gas distribution device (6) fixed connection in the one end of heating furnace body (1), gas distribution device (6) are including shielding gas device (61), shielding gas device (61) are used for carrying the shielding gas of different flow and temperatures.

2. The fiber heat treatment apparatus according to claim 1, wherein the shielding gas device (61) comprises a shielding gas preheater (614) and a first flow regulating valve (616) which are communicated, the shielding gas preheater (614) is used for preheating the shielding gas, and the first flow regulating valve (616) is used for regulating the flow of the shielding gas.

3. The fiber heat treatment device according to claim 1, wherein the shielding gas device (61) further comprises a group of shielding gas distribution header pipes (611) and a group of shielding gas delivery pipes (612), at least one group of shielding gas distribution header pipes (611) is arranged, each group of shielding gas distribution header pipes (611) comprises a shielding gas distribution header pipe (611) which is symmetrically arranged at two sides of the fiber tows up and down, two ends of each group of two shielding gas distribution header pipes (611) are communicated with an outlet of the shielding gas preheater (614), through holes communicated with the group of shielding gas delivery pipes (612) are arranged on the group of shielding gas distribution header pipes (611), and the group of shielding gas delivery pipes (612) can deliver the shielding gas into the furnace tube (2).

4. The fiber heat treatment device according to claim 1, characterized in that the gas distribution device (6) further comprises a gas sealing device (62), the gas sealing device (62) is fixedly arranged in the gas distribution device (6), the gas sealing device (62) comprises a pair of sealing gas distribution header pipes (622) and a plurality of sealing gas nozzles (623) communicated with the header pipes, the pair of sealing gas distribution header pipes (622) is arranged at two sides of the fiber tows, and sealing gas sprayed from the sealing gas nozzles (623) on the pair of sealing gas distribution header pipes (622) jointly forms a sealing gas curtain.

5. The fiber heat treatment device according to claim 4, characterized in that a plurality of groups of cavity dividing partition plates (621) which are arranged on two sides of the fiber in a pairwise symmetry manner are arranged in the air sealing device (62), and two adjacent groups of cavity dividing partition plates (621) form a chamber for installing the air sealing device (62).

6. The fiber heat treatment device according to claim 1, further comprising an inlet box (7), wherein the inlet box (7) is disposed at an inlet end of the heating furnace body (1), and the fiber tows can enter the furnace tube (2) through the inlet box (7) and the inlet end of the heating furnace body (1) in sequence.

7. The fiber heat treatment apparatus according to claim 6, further comprising a first baffle (9), wherein the first baffle (9) is installed at the outlet end of the gas distribution device (6), and the first baffle (9) can move up and down to adjust the size of the outlet end of the gas distribution device (6);

and/or the fiber tow heat treatment device further comprises a second baffle (10), the second baffle (10) is installed at the inlet end of the inlet box body (7), and the second baffle (10) can move up and down to adjust the height and the opening width of the inlet end of the inlet box body (7).

8. The fiber heat treatment device according to claim 1, further comprising a jacket exhaust pipe (8), wherein one end of the jacket exhaust pipe (8) is communicated with the inner cavity of the jacket (3), and the other end of the jacket exhaust pipe extends out of the heating furnace body (1).

9. The fiber heat treatment apparatus according to claim 1, wherein the gas distribution device (6) is provided at an outlet end of the heating furnace body (1).

10. The device for the thermal treatment of fibers according to claim 1, characterized in that the soaking material (4) is a solid heat-accumulating material.

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