A high-temperature drying channel auxiliary exhaust device and a fiber drying machine
Patent Information
- Application Number
- CN202522002217.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-09-17
AI Technical Summary
因此，用于芳纶纤维生产时不会产生较大影响的管道间氮气差异问题，在聚酰亚胺纤维生产时就会因为管道间氮气不均而导致出气量最少的管路内部无法及时排除水汽，或者因为水汽生成速度大于排除速度，进而对不同管路间产品品质产生较大差别，影响产品的一致性，不利于产品生产的稳定性；而加大氮气压力又会使管路间气体分配产生较大差异，且需要随纤维规格随时调整，且过大的氮气又会对纤维加工的温度稳定性产生不利影响
[0022]本申请提供的高温烘道辅助排气装置的有益效果在于：由于在加热管道的前端密封连接有前排气结构，在加热管道的后端密封连接有后排气结构，且特种纤维从进丝口组件穿入，并依次经三通排气管、加热管道以及后排气筒后穿出，故特种纤维在烘道中进行高温热处理时，其产生的水汽就能通前排气结构和后排气结构排出，特别是可以通过前排气结构中与三通排气管连通的废气排气管强制排出。而且这种前后模块化设计的高温烘道辅助排气装置可以很便利的套装在现有的烘道上，从而使得现有的烘道经改造后能满足聚酰亚胺等特种纤维的生产需求，同时对现有烘道的使用以及维护不会造成较大影响。换言之，本高温烘道辅助排气装置作为一种辅助排除烘道内部水汽的装置，可以在不影响现有烘道设备运行的基础上，提高烘道排放水汽的能力，从而对聚酰亚胺纤维等特种纤维的的稳定生产有至关重要的作用。
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Abstract
Description
Technical Field
[0001] This application belongs to the technical field of fiber drying equipment, and more specifically, relates to a high-temperature drying tunnel auxiliary exhaust device and a fiber dryer. Background Technology
[0002] In the fiber production process, fiber dryers are crucial equipment used for high-temperature heat treatment of fibers. These dryers typically include drying tunnels and a pipe heating system. The drying tunnels usually consist of stainless steel pipes through which the fibers pass and an insulation layer covering these pipes. The function of the fiber dryer is to soften the fibers traveling within it at high temperatures, while simultaneously applying a degree of stretching to the fibers through the speed difference between the two sides of the equipment. During this process, the molecular chains within the fibers soften under high temperatures, becoming more mobile, and rearrange their orientation under tension, thereby greatly enhancing the strength of the fibers in their direction of travel. Therefore, fiber dryers play a vital role in achieving high-strength fibers and are commonly used in high-performance continuous fiber production lines.
[0003] For example, for high-strength and high-heat-resistant aramid fibers, due to their inherent flame-retardant and heat-resistant properties, fiber dryers, as a key component of their production equipment, typically operate at temperatures around 400℃ in the heat treatment tunnels. For some special fiber products, the maximum temperature can reach 500℃. To ensure fiber stability and prevent oxidation damage at such high temperatures, the drying tunnels are usually equipped with nitrogen inlet. By introducing protective gases like nitrogen, the fibers are protected from strength loss due to oxidation during heat treatment, which could lead to fiber breakage and disrupt the continuity of fiber production. Due to process limitations, the fiber travel speed in high-performance fiber production is generally low. The drying tunnels are typically configured with multiple parallel multi-tube configurations to improve production efficiency. Depending on production needs and operational convenience, the number of tubes is usually between 6 and 24. With such a large number of tubes, balancing the heating effect between tubes and the uniform and stable nitrogen flow within the tubes places high demands on the equipment. Because there are no extra escaping substances during the production process of aramid fibers, there is no need to remove internal overflows through nitrogen replacement. Therefore, the difference in nitrogen flow rate between drying tunnels has little impact on the quality of fiber production.
[0004] Polyimide fiber, a specialty fiber, is an organic synthetic fiber product with better heat resistance and weather resistance than aramid fiber. While its production processes share many similarities with aramid fiber, significant differences exist in the crucial high-temperature heat treatment stage, which has long been a key factor limiting polyimide fiber production. Specifically, unlike aramid fiber, which does not produce any overflows, polyimide fiber generates water during high-temperature heat treatment in the drying tunnel due to a chemical cyclization reaction. The rate of water generation is related to the fiber's travel speed and thickness. Therefore, nitrogen, which originally only served a protective function, now also has the additional responsibility of venting moisture from the pipes during this stage. Therefore, the nitrogen difference between pipes, which has little impact in aramid fiber production, becomes problematic in polyimide fiber production. Uneven nitrogen distribution leads to insufficient moisture removal from pipes with the lowest gas output, or a rate of moisture generation exceeding removal, resulting in significant differences in product quality between different pipes, affecting product consistency and production stability. Conversely, increasing nitrogen pressure causes further variations in gas distribution between pipes, requiring adjustments based on fiber specifications, and excessive nitrogen can negatively impact temperature stability during fiber processing. Therefore, improving the moisture removal capacity of the drying tunnel without disrupting existing operations has become a critical issue in polyimide fiber production. Utility Model Content
[0005] The purpose of this application is to provide an auxiliary exhaust device for high-temperature drying tunnels to solve the above-mentioned technical problems existing in the prior art.
[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a high-temperature drying tunnel auxiliary exhaust device, installed on a drying tunnel used for high-temperature heat treatment of special fibers, the drying tunnel including a heating pipe through which the special fibers pass, the high-temperature drying tunnel auxiliary exhaust device comprising:
[0007] The front exhaust structure includes a three-way exhaust pipe, a wire inlet assembly, and an exhaust pipe. The three-way exhaust pipe includes a first connecting end, a second connecting end, and a third connecting end. The first connecting end is sealed to the inlet of the heating pipe. The wire inlet assembly is located on the second connecting end, which is away from the first connecting end. The exhaust pipe is sealed to the third connecting end.
[0008] The rear exhaust structure includes a rear exhaust pipe, the front end of which is sealed to the outlet of the heating pipe; special fibers are inserted from the inlet assembly and then exit sequentially through the three-way exhaust pipe, the heating pipe, and the rear exhaust pipe.
[0009] Optionally, the heating pipe is arranged as a straight pipe running from front to back, and the three-way exhaust pipe is arranged as a trapezoidal pipe, including a main pipe and a branch pipe that are connected to each other. The axial extension direction of the main pipe is consistent with the axial direction of the heating pipe, and the axial direction of the branch pipe is perpendicular to the axial direction of the main pipe. The front end of the main pipe is the second connection end, the rear end of the main pipe is the first connection end, and the free end of the branch pipe away from the main pipe is the third connection end.
[0010] The rear exhaust pipe is a straight cylinder that runs from front to back, and the axial extension direction of the rear exhaust pipe is consistent with the axial direction of the heating pipe.
[0011] The three-way exhaust pipe and the heating pipe are detachably and sealed together; the exhaust pipe and the three-way exhaust pipe are detachably and sealed together; and the rear exhaust pipe and the heating pipe are detachably and sealed together.
[0012] Optionally, the front exhaust structure also includes a front exhaust bracket, the three-way exhaust pipe is supported by the front exhaust bracket, and the main pipe is coaxially arranged with the heating pipe;
[0013] The rear exhaust structure also includes a rear exhaust bracket, the rear exhaust pipe is supported by the rear exhaust bracket, and the rear exhaust pipe is coaxially arranged with the heating pipe.
[0014] Optionally, the high-temperature drying tunnel auxiliary exhaust device also includes an insulation layer and a rigid outer layer. The three-way exhaust pipe and the rear exhaust pipe are both fitted with an insulation layer, and the insulation layer is covered with a rigid outer layer.
[0015] Optionally, the drying tunnel includes drying tunnel balls built into both ends of the heating pipe, through which special fibers are connected; the inner diameter of the main pipe is larger than the diameter of the drying tunnel balls;
[0016] The inlet assembly includes an inlet switch and a guide wire built into the inlet. The inlet switch is openable and is installed at the opening of the first connection end of the main pipe. When the inlet switch is in the closed state, it blocks the opening of the first connection end, but only allows special fibers to pass through and sequentially enter the main pipe and branch pipe.
[0017] Optionally, the guide wire is semi-circular or multi-semi-circular in shape, and the guide wire is provided with a wire inlet hole and a wire guide notch. The wire inlet hole is located in the middle of the guide wire to allow special fibers to pass through, and the wire inlet hole is connected to the outside through the wire guide notch.
[0018] Optionally, the front exhaust structure also includes an exhaust regulating valve, which is located on the exhaust pipe and on the side away from the branch pipe.
[0019] Optionally, the front exhaust structure also includes a gas flow meter, which is located on the exhaust pipe and on the side near the branch pipe.
[0020] Optionally, both the three-way exhaust pipe and the rear exhaust pipe are made of stainless steel.
[0021] This application also proposes a fiber dryer, which includes a drying tunnel and a high-temperature drying tunnel auxiliary exhaust device as described above, installed on the drying tunnel.
[0022] The beneficial effects of the high-temperature drying tunnel auxiliary exhaust device provided in this application are as follows: Because a front exhaust structure is sealed at the front end of the heating pipe and a rear exhaust structure is sealed at the rear end, and the special fibers enter through the inlet assembly and exit sequentially through the three-way exhaust pipe, the heating pipe, and the rear exhaust pipe, the water vapor generated during the high-temperature heat treatment of the special fibers in the drying tunnel can be discharged through the front and rear exhaust structures. In particular, it can be forcibly discharged through the exhaust pipe connected to the three-way exhaust pipe in the front exhaust structure. Furthermore, this modular design of the high-temperature drying tunnel auxiliary exhaust device allows for convenient installation on existing drying tunnels, enabling them to meet the production needs of special fibers such as polyimide after modification, without significantly impacting the use and maintenance of the existing drying tunnel. In other words, this high-temperature drying tunnel auxiliary exhaust device, as an auxiliary device for removing water vapor from the drying tunnel, can improve the drying tunnel's ability to discharge water vapor without affecting the operation of existing drying tunnel equipment, thus playing a crucial role in the stable production of special fibers such as polyimide fibers. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 A side view of the front half of the drying tunnel equipped with an auxiliary exhaust device for high-temperature drying tunnel provided in an embodiment of this application;
[0025] Figure 2 A side view of the rear half of the drying tunnel equipped with an auxiliary exhaust device for high-temperature drying tunnel, provided in an embodiment of this application;
[0026] Figure 3 A front view of a drying tunnel equipped with an auxiliary exhaust device for high-temperature drying, provided in an embodiment of this application;
[0027] Figure 4 This is a front view of the wire inlet assembly provided in an embodiment of this application.
[0028] Explanation of icon numbers:
[0029] 100 Front exhaust structure 200 Rear exhaust structure 110 Three-way exhaust pipe 120 Inlet assembly 130 Exhaust pipe 140 Exhaust regulating valve 150 Gas flow meter 300 Insulation layer 400 Nitrogen 111 Main pipeline 112 branch pipes 121 Inlet switch 122 wire guide 123 Through-hole 124 Guide wire notch 500 Heating pipes 210 Rear exhaust pipe Detailed Implementation
[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0032] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of this application are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.
[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0037] This application provides an auxiliary exhaust device for a high-temperature drying tunnel.
[0038] Please see Figure 1 and Figure 2 In one embodiment, the high-temperature drying tunnel auxiliary exhaust device is installed on a drying tunnel used for high-temperature heat treatment of special fibers. The drying tunnel includes a heating pipe 500 through which the special fibers pass. Specifically, the high-temperature drying tunnel auxiliary exhaust device includes a front exhaust structure 100 and a rear exhaust structure 200. The front exhaust structure 100 includes a three-way exhaust pipe 110, an inlet assembly 120, and an exhaust pipe 130. The three-way exhaust pipe 110 includes a first connecting end, a second connecting end, and a third connecting end. The first connecting end is sealed to the inlet of the heating pipe 500. The inlet assembly 120 is located on the second connecting end, away from the first connecting end. The exhaust pipe 130 is sealed to the third connecting end. The rear exhaust structure 200 includes a rear exhaust cylinder 210, the front end of which is sealed to the outlet of the heating pipe 500. The special fibers enter through the inlet assembly 120 and exit sequentially through the three-way exhaust pipe 110, the heating pipe 500, and the rear exhaust cylinder 210.
[0039] Based on this design, in this embodiment, since a front exhaust structure 100 is sealed at the front end of the heating pipe 500 and a rear exhaust structure 200 is sealed at the rear end of the heating pipe 500, and the special fiber enters from the inlet assembly 120 and exits sequentially through the three-way exhaust pipe 110, the heating pipe 500, and the rear exhaust pipe 210, the water vapor generated by the special fiber during high-temperature heat treatment in the drying tunnel can be discharged through the front exhaust structure 100 and the rear exhaust structure 200. In particular, it can be forcibly discharged through the exhaust pipe 130 connected to the three-way exhaust pipe 110 in the front exhaust structure 100. Moreover, this modular high-temperature drying tunnel auxiliary exhaust device can be easily installed on the existing drying tunnel, so that the existing drying tunnel can meet the production needs of special fibers such as polyimide after modification, while not significantly affecting the use and maintenance of the existing drying tunnel. In other words, this high-temperature drying tunnel auxiliary exhaust device, as an auxiliary device for removing moisture from the inside of the drying tunnel, can improve the drying tunnel's ability to discharge moisture without affecting the operation of existing drying tunnel equipment, thus playing a crucial role in the stable production of special fibers such as polyimide fibers.
[0040] It should be noted that in this embodiment, the heating pipe 500 is typically a high-temperature and corrosion-resistant stainless steel pipe, and an insulation layer 300 is provided on the outer casing of the heating pipe. To ensure fiber stability at high temperatures and prevent oxidation damage, nitrogen gas 400 is also supplied through the heating pipe 500. The nitrogen gas 400 enters from the middle of the heating pipe 500 and fills its interior. Furthermore, due to process limitations, the travel speed of the special fibers is relatively low. To improve production efficiency, multiple heating pipes are typically used, arranged in a multi-pipe configuration with multiple parallel connections. Each heating pipe 500 is filled with nitrogen gas 400, and each heating pipe 500 has a front exhaust structure 100 and a rear exhaust structure 200 at both ends. In this embodiment, the special fiber specifically refers to polyimide fiber; however, this high-temperature drying tunnel auxiliary exhaust device can also be applied to other suitable special fibers.
[0041] Please see Figure 1In this embodiment, the heating pipe is a straight pipe extending from front to back, and the three-way exhaust pipe 110 is a trapezoidal pipe, including a main pipe 111 and a branch pipe 112 that are interconnected. The axial extension direction of the main pipe 111 is consistent with the axial direction of the heating pipe 500, and the axial direction of the branch pipe 112 is perpendicular to the axial direction of the main pipe 111. The front end of the main pipe 111 is the second connecting end, the rear end of the main pipe 111 is the first connecting end, and the free end of the branch pipe 112 away from the main pipe 111 is the third connecting end. The rear exhaust pipe 210 is a straight cylinder extending from front to back, and the axial extension direction of the rear exhaust pipe 210 is consistent with the axial direction of the heating pipe. The three-way exhaust pipe 110 is detachably and sealingly connected to the heating pipe, the exhaust pipe 130 is detachably and sealingly connected to the three-way exhaust pipe 110, and the rear exhaust pipe 210 is detachably and sealingly connected to the heating pipe. Understandably, this modular, detachable design not only facilitates installation but also allows individual exhaust pipes, such as the T-joint exhaust pipe 110 and the rear exhaust pipe 210, to be disassembled for internal cleaning. Of course, the sealing connection between pipes can be, but is not limited to, tight-fitting methods, thus ensuring that water vapor and nitrogen 400 will not leak. Furthermore, the exhaust pipe 130 connects to the exhaust fan pipe for forced exhaust. The design of the branch pipe 112's axis being perpendicular to the main pipe 111's axis facilitates smoother exhaust. Moreover, the distance between the T-joint position of the branch pipe 112 and the exhaust port at the front end of the drying tunnel is calculated using dynamic simulation software based on input data and drying tunnel dimensions. This ensures that water vapor generated by the special fibers can be forcibly discharged through the front exhaust structure 100 at the front end of the drying tunnel, guaranteeing no water vapor at the drying tunnel outlet. This ensures that the special fibers travel in the opposite direction to the water vapor discharge, guaranteeing the processing stability of the special fibers. At the rear outlet of the drying tunnel, after the special fibers are treated at high temperature inside the heating pipe 500, the residual heat inside can be used to preheat the rear exhaust pipe 210. In this way, the temperature will gradually decrease from the outlet of the drying tunnel to the outlet of the exhaust pipe, thereby avoiding the special fibers from being oxidized and forming surface defects due to sudden contact with air after high temperature treatment. That is, the stability of the processed special fibers can be guaranteed by using a step-like temperature change to slowly cool down in the rear exhaust pipe 210.
[0042] Specifically, in this embodiment, the front exhaust structure 100 further includes a front exhaust bracket, the three-way exhaust pipe 110 is supported by the front exhaust bracket, and the main pipe 111 is coaxially arranged with the heating pipe. The rear exhaust structure 200 further includes a rear exhaust bracket, the rear exhaust cylinder 210 is supported by the rear exhaust bracket, and the rear exhaust cylinder 210 is coaxially arranged with the heating pipe. In this way, after each heating pipe 500 is equipped with a three-way exhaust pipe 110 and a rear exhaust cylinder 210, the parallelism between the pipes used for exhaust and the coaxiality with the interior of each heating pipe 500 can still be guaranteed by the supporting effect of the front exhaust bracket and the rear exhaust bracket, so as not to affect the passage of special fibers inside the drying tunnel.
[0043] Furthermore, such as Figure 1 As shown, in this embodiment, to facilitate the control of exhaust volume and exhaust rate, the front exhaust structure 100 also includes an exhaust regulating valve 140, which is located on the exhaust pipe 130 and on the side away from the branch pipe 112. The front exhaust structure 100 also includes a gas flow meter 150, which is located on the exhaust pipe 130 and on the side close to the branch pipe 112. The gas flow meter 150 can be, but is not limited to, a float-type gas flow meter 150, to achieve precise monitoring of the exhaust volume, which is beneficial to further improve the stability of special fiber production. Furthermore, while discharging water vapor from the heating pipe 500, the front exhaust structure 100 can also utilize the heat of the internal gas for preheating, ensuring that the special fibers to be processed are preheated before entering the high-temperature heating pipe 500, thus preventing the special fibers from being rapidly heated and causing breakage.
[0044] Specifically, in this embodiment, both the three-way exhaust pipe 110 and the rear exhaust pipe 210 are preferably made of high-temperature and corrosion-resistant stainless steel pipes. Of course, in other embodiments, other suitable materials that are also suitable for high-temperature and corrosion resistance can be selected.
[0045] Furthermore, in this embodiment, in order to obtain a better heat preservation effect, the high-temperature drying tunnel auxiliary exhaust device also includes an insulation layer 300 and a rigid outer layer. The three-way exhaust pipe 110 and the rear exhaust pipe 210 are both fitted with the insulation layer 300, and the insulation layer 300 is covered with a rigid outer layer. The rigid outer layer may be, but is not limited to, a circular or polyhedral metal stainless steel outer layer.
[0046] See also Figure 3 and Figure 4In this embodiment, the drying tunnel includes drying tunnel balls built into both ends of the heating pipe 500, and the special fibers are connected through the drying tunnel balls; the inner diameter of the main pipe 111 is larger than the diameter of the drying tunnel balls. The inlet assembly 120 includes an inlet switch 121 and a guide 122 built into the inlet. The inlet switch 121 is openable and closable and is installed at the opening of the first connecting end of the main pipe 111. When the inlet switch 121 is in the closed state, the inlet switch 121 blocks the opening of the first connecting end, but only allows the special fibers to pass through and sequentially enter the main pipe 111 and the branch pipe 112. Further, in this embodiment, the guide 122 is semi-circular or more semi-circular in shape, and the guide 122 is provided with an inlet through hole 123 and a guide notch 124. The inlet through hole 123 is located in the middle of the guide 122 to allow the special fibers to pass through, and the inlet through hole 123 communicates with the outside through the guide notch 124. It is understandable that polyimide fibers need to enter the main pipe 111 and the heat treatment pipe for heat treatment. Usually, the fibers pass through the drying tunnel by connecting the yarn with a stainless steel ball slightly smaller than the inner diameter of the heating pipe 500. Therefore, the inlet position of the main pipe 111 and the heating pipe 500, which are coaxial, also needs to ensure that the yarn passing through the drying tunnel ball can pass through. However, in order to ensure the priority and effectiveness of the discharge of water vapor inside the heating pipe 500, after the fibers pass through the main pipe 111 and the heating pipe 500, an openable yarn inlet switch 121 should be set at the inlet of the main pipe 111 to ensure that only the fibers are allowed to pass through but are not damaged. The yarn inlet switch 121 can be, but is not limited to, an up-and-down, left-and-right, or rotary switch. At the same time, when the yarn inlet switch 121 is closed, a yarn guide 122 is also provided inside the yarn inlet switch 121 to protect the fibers. The yarn guide 122 can be, but is not limited to, a ceramic yarn guide frame.
[0047] This application also proposes a fiber dryer, which includes a drying tunnel and the aforementioned high-temperature drying tunnel auxiliary exhaust device installed on the drying tunnel. The specific structure of the high-temperature drying tunnel auxiliary exhaust device is as described in the above embodiments. Since this fiber dryer adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A high-temperature drying tunnel auxiliary exhaust device, installed on a drying tunnel used for high-temperature heat treatment of special fibers, the drying tunnel including a heating pipe through which the special fibers pass, characterized in that, include: The front exhaust structure includes a three-way exhaust pipe, a wire inlet assembly, and an exhaust pipe. The three-way exhaust pipe includes a first connecting end, a second connecting end, and a third connecting end. The first connecting end is sealed to the inlet of the heating pipe. The wire inlet assembly is located on the second connecting end of the three-way exhaust pipe. The second connecting end is away from the first connecting end. The exhaust pipe is sealed to the third connecting end. as well as, The rear exhaust structure includes a rear exhaust cylinder, the front end of which is sealed to the outlet of the heating pipe; the special fiber enters from the inlet assembly and exits sequentially through the three-way exhaust pipe, the three-way exhaust pipe, the heating pipe, and the rear exhaust cylinder.
2. The high-temperature drying tunnel auxiliary exhaust device as described in claim 1, characterized in that, The heating pipe is a straight pipe running from front to back, and the three-way exhaust pipe is a trapezoidal pipe, including a main pipe and a branch pipe that are connected to each other. The axial extension direction of the main pipe is consistent with the axial direction of the heating pipe, and the axial direction of the branch pipe is perpendicular to the axial direction of the main pipe. The front end of the main pipe is the second connection end, the rear end of the main pipe is the first connection end, and the free end of the branch pipe away from the main pipe is the third connection end. The rear exhaust pipe is a straight cylinder that runs through the front and rear, and the axial extension direction of the rear exhaust pipe is consistent with the axial direction of the heating pipe. The three-way exhaust pipe is detachably and sealed to the heating pipe, the exhaust pipe is detachably and sealed to the three-way exhaust pipe, and the rear exhaust pipe is detachably and sealed to the heating pipe.
3. The high-temperature drying tunnel auxiliary exhaust device as described in claim 2, characterized in that, The front exhaust structure also includes a front exhaust bracket, the three-way exhaust pipe is supported by the front exhaust bracket, and the main pipe is coaxially arranged with the heating pipe; The rear exhaust structure also includes a rear exhaust bracket, the rear exhaust pipe is supported by the rear exhaust bracket, and the rear exhaust pipe is coaxially arranged with the heating tube.
4. The high-temperature drying tunnel auxiliary exhaust device as described in claim 2, characterized in that, The high-temperature drying tunnel auxiliary exhaust device also includes an insulation layer and a rigid outer layer. The insulation layer is fitted on both the three-way exhaust pipe and the rear exhaust pipe, and the rigid outer layer is fitted on the insulation layer.
5. The high-temperature drying tunnel auxiliary exhaust device as described in claim 2, characterized in that, The drying tunnel includes drying tunnel balls built into both ends of the heating pipe, and the special fibers are connected through the drying tunnel balls; the inner diameter of the main pipe is larger than the diameter of the drying tunnel balls; The inlet assembly includes an inlet switch and a guide wire built into the inlet. The inlet switch is openable and is installed at the opening of the first connection end of the main pipe. When the inlet switch is in the closed state, it blocks the opening of the first connection end, but only allows the special fiber to pass through and sequentially enter the main pipe and the branch pipe.
6. The high-temperature drying tunnel auxiliary exhaust device as described in claim 5, characterized in that, The guide wire is semi-circular or more than semi-circular in shape. The guide wire is provided with a wire inlet hole and a wire guide notch. The wire inlet hole is located in the middle of the guide wire to allow the special fiber to pass through. The wire inlet hole communicates with the outside through the wire guide notch.
7. The high-temperature drying tunnel auxiliary exhaust device as described in claim 2, characterized in that, The front exhaust structure also includes an exhaust regulating valve, which is located on the exhaust pipe and on the side away from the branch pipe.
8. The high-temperature drying tunnel auxiliary exhaust device as described in claim 2, characterized in that, The front exhaust structure also includes a gas flow meter, which is installed on the exhaust pipe and located on the side close to the branch pipe.
9. The high-temperature drying tunnel auxiliary exhaust device as described in any one of claims 1 to 8, characterized in that, Both the three-way exhaust pipe and the rear exhaust pipe are stainless steel pipes.
10. A fiber dryer, characterized in that, It includes a drying tunnel and a high-temperature drying tunnel auxiliary exhaust device as described in any one of claims 1 to 9, installed on the drying tunnel.