A threading assembly, threading furnace device, and threading method

Abstract

This invention provides a wire threading assembly, a wire threading furnace device, and a wire threading method. The wire threading assembly includes a graphite sleeve and a threading component. The graphite sleeve has an internal cavity and is fitted around the outer periphery of at least a portion of the threading component, such that at least a portion of the threading component passes through the internal cavity. One end of a pre-embedded carbon fiber is connected to one end of the threading component. The pre-embedded carbon fiber, the graphite sleeve, and the threading component form an integral structure. This integral structure can enter the furnace body from one end and exit from the other end. This invention effectively overcomes the defects of existing methods using steel bars or lead wire, which result in melting at high temperatures, releasing impurities that contaminate the furnace and affect product quality. Furthermore, it eliminates the need to cool the furnace body before heating it again, significantly improving production efficiency and avoiding injuries to personnel or equipment caused by steel bars or lead wire, thus improving safety.

Description

Technical Field

[0001] This invention relates to the field of polyacrylonitrile-based carbon fiber production technology, specifically to a wire threading assembly, a wire threading furnace device, and a wire threading method. Background Technology

[0002] Polyacrylonitrile-based fibers (i.e., precursor fibers) need to undergo pre-oxidation, low-temperature carbonization, high-temperature carbonization, graphitization furnace (in the production of graphite fibers), and surface treatment processes to obtain the final polyacrylonitrile-based carbon fibers (referred to as carbon fibers). During production, the precursor fibers need to be passed sequentially through oxidation furnaces, low-temperature carbonization furnaces, high-temperature carbonization furnaces, graphitization furnaces, and surface treatment tanks, until they reach the winding machine and are wound into finished carbon fiber products.

[0003] To save energy and improve production efficiency, the three high-temperature furnaces—the low-temperature carbonization furnace, the high-temperature carbonization furnace, and the graphitization furnace—are not cooled during process shutdowns; only the drive rollers stop rotating. Fibers will burn out if they remain in the high-temperature furnaces for too long, so all the fiber bundles are removed from the furnaces during shutdowns. Before the next production cycle, 1 to 5 carbon fiber bundles are first passed through the low-temperature carbonization furnace, the high-temperature carbonization furnace, and the graphitization furnace, respectively, and pre-embedded inside the furnace bodies. These carbon fiber bundles are called "pre-embedded carbon fibers," and this process is called "threading." When restarting, the production fiber bundles are tied to the pre-embedded carbon fibers, pulled, and the production fiber bundles pass through the furnace bodies, eventually reaching the winding machine to obtain the finished carbon fiber product.

[0004] Existing low-carbon and high-carbon furnaces operate at temperatures around 600–1600℃, while graphite furnaces operate at around 2000–3000℃. These are high-temperature, semi-enclosed furnaces with only two narrow slits at the inlet and outlet, preventing workers from entering. Current wire-threading methods involve first cooling the furnace to 50–500℃, then binding pre-embedded carbon fibers to steel bars or lead wires, using these as a medium to thread the fibers through the furnace. Therefore, the length of the steel bars or lead wires must be greater than the length of the furnace. This method has the following problems:

[0005] 1. The operating temperature of the high-temperature furnace exceeds the withstand temperature of the reinforcing steel or lead wire. Even if the furnace temperature is reduced to around 300℃ when inserting pre-embedded carbon fibers, the cooling rate is only 2 minutes / ℃. It would take 4 to 6 days to reach the target temperature according to the heating program, which seriously affects the production schedule. A one-day shutdown results in huge economic losses.

[0006] 2. Due to the long length of the steel bars or lead wires, the distance between the furnace body and the transmission equipment is relatively short due to space limitations, generally between 1 and 1.5 meters. However, the length of the high-temperature furnace is about 5 to 15 meters. The components cannot be horizontally extended into the furnace. When threading the wires, the tail end of the steel bars or lead wires can easily scratch personnel or equipment.

[0007] 3. The graphite furnace has a high temperature, and the pre-embedded carbon fibers are prone to breakage if left in the furnace for a long time. It is necessary to increase the frequency of inserting the pre-embedded carbon fibers. However, frequent temperature rises and falls will shorten the life of the heating components in the graphite furnace, resulting in the dual economic losses of increased spare parts costs and production delays.

[0008] 4. Steel bars or lead wire will melt at around 300-400℃, releasing impurities and polluting the furnace atmosphere, thus affecting product quality.

[0009] Because existing technologies require pre-embedded carbon fibers to be tied to steel bars or lead wires for threading, and the operating temperature of the high-temperature furnace exceeds the tolerance temperature of the steel bars or lead wires, it is necessary to cool down the furnace body during threading. In order to protect the high-temperature components, the cooling and reheating rates are slow and require a long time, which affects production efficiency and other technical problems. Therefore, this invention studies and designs a threading component, a threading furnace body device, and a threading method. Summary of the Invention

[0010] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the furnace body needs to be cooled down and then heated up during the threading process of carbon fiber filaments, resulting in low carbon fiber production efficiency, and thus provides a threading component, a threading furnace body device and a threading method.

[0011] To address the above problems, the present invention provides a wire threading assembly, comprising:

[0012] A graphite sleeve and a through-hole component are provided. The graphite sleeve has an internal cavity. The graphite sleeve is fitted around the outer periphery of at least a portion of the through-hole component, such that at least a portion of the through-hole component passes through the internal cavity. One end of a pre-embedded carbon fiber is connected to one end of the through-hole component. The pre-embedded carbon fiber, the graphite sleeve, and the through-hole component form an integral structure. The integral structure can pass into the furnace body from one end and exit from the other end of the furnace body.

[0013] In some embodiments, the insertion component includes a column structure, a first sleeve structure, and a second sleeve structure. The first sleeve structure is connected to one end of the column structure, and the second sleeve structure is connected to the other end of the column structure. The graphite sleeve is fitted around the outer periphery of the column structure. In a cross-section perpendicular to the axis of the column structure, the cross-sectional area of ​​the first sleeve structure is larger than the cross-sectional area of ​​the column structure, and the cross-sectional area of ​​the second sleeve structure is larger than the cross-sectional area of ​​the column structure. Both the first sleeve structure and the second sleeve structure are flexible structures.

[0014] In some embodiments, in a cross-section perpendicular to the axis of the column structure, the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve is greater than the cross-sectional area of ​​the column structure, the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve is less than the cross-sectional area of ​​the first sleeve structure, and the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve is less than the cross-sectional area of ​​the second sleeve structure.

[0015] In some embodiments, the first set of body structures is a hollow structure with an internal hollow interior, and the second set of body structures is also a hollow structure with an internal hollow interior.

[0016] The fitting component also includes a filler, which is at least two, one of which can fill the interior of the first body structure and the other of which can fill the interior of the second body structure.

[0017] In some embodiments, the column structure is a flexible structure made of carbon fiber material, and the graphite sleeve is made of graphite material;

[0018] Both the first and second body structures are flexible structures made of carbon fiber, and the filler is also a flexible structure made of carbon fiber. The first body structure has a first slit groove to allow the filler to fill into the interior of the first body structure, and the second body structure has a second slit groove to allow the filler to fill into the interior of the second body structure.

[0019] In some embodiments, the column structure is a cylindrical structure with a cross-sectional diameter of D1, the first sleeve structure is a sphere, the second sleeve structure is also a sphere, the diameters of the first sleeve structure and the second sleeve structure are both D2, and the graphite sleeve is a cylindrical structure with an inner diameter of D3, where D3 > D1 and D3 < D2.

[0020] The filling material is a solid sphere with a diameter of D2.

[0021] In some embodiments, there are n graphite sleeves, where n is a natural number greater than or equal to 2. The n graphite sleeves are sequentially fitted onto the outer periphery of the column structure from the first sleeve structure or the second sleeve structure, and the n graphite sleeves fitted onto the outer periphery of the column structure are sequentially connected to each other so as to completely enclose the column structure inside the graphite sleeves.

[0022] The present invention also provides a wire threading furnace body device, which includes the aforementioned wire threading assembly and a furnace body. The wire threading assembly can be sequentially inserted into the furnace body from one end and exited from the other end of the furnace body. The length of the n graphite sleeves is greater than the length of the furnace body.

[0023] In some embodiments, a support is also included, which is disposed on the outside of the outlet of the furnace body and has a plurality of heat dissipation holes, and a graphite sleeve that extends out of the furnace body can be disposed on the support.

[0024] The present invention also provides a wire threading method for the wire threading furnace body device as described above, wherein:

[0025] When the inserting component simultaneously includes a column structure, a first sleeve structure, a second sleeve structure, and a filler:

[0026] The threading method includes:

[0027] The assembly step involves sequentially and interconnecting the n graphite sleeves onto the outer periphery of the column structure, and then filling the first sleeve structure and the second sleeve structure with the filler material respectively.

[0028] In the threading step, the assembled graphite sleeve and the threading component are threaded into the furnace body from the furnace body outlet and out of the furnace body inlet. After threading out, the pre-embedded carbon fiber is connected to the sleeve structure that was threaded out first. Then, the threading assembly connected to the pre-embedded carbon fiber is pulled out from the furnace body outlet end, and the graphite sleeve is placed on the bracket for heat dissipation.

[0029] The wire threading assembly, wire threading furnace body device, and wire threading method provided by the present invention have the following beneficial effects:

[0030] 1. This invention employs a structure combining a graphite sleeve and a through-feed component. The graphite sleeve is fitted around the outer periphery of the through-feed component, which connects to pre-embedded carbon fibers. This effectively protects the through-feed component as it passes through the furnace body. Because graphite is heat-resistant, it effectively overcomes the shortcomings of existing technologies when passing through the furnace. Existing technologies use steel bars or lead wires, which melt at high temperatures, releasing impurities that contaminate the furnace atmosphere and affect product quality. This invention eliminates the need for pre-cooling and post-heating the furnace, significantly improving production efficiency. Furthermore, this invention avoids injuries to personnel or equipment caused by steel bars or lead wires, improving safety. Therefore, it effectively improves product quality, increases production efficiency, prevents injuries to personnel or equipment, extends component lifespan, and reduces losses.

[0031] 2. The present invention also sets up multiple graphite sleeves and connects them in series to form a graphite sleeve chain. The number of graphite sleeves can be selected according to the length of the furnace body, which is convenient to use and applicable to furnace bodies of various specifications, thus improving its versatility. Since the graphite tubes are connected by flexible joints, they can be bent at will, without being restricted by site and space, and are easy to assemble. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the graphite sleeve of the present invention;

[0033] Figure 2 This is a structural diagram of the insertion component (carbon fiber cloth soft rod) of the present invention;

[0034] Figure 3 This is a diagram of the graphite sleeve chain structure formed during the assembly of multiple graphite sleeves and insertion components according to the present invention.

[0035] Figure 4 This is a structural diagram of the support frame in the wire threading furnace body device of the present invention.

[0036] The reference numerals in the attached figures are as follows:

[0037] 1. Graphite sleeve; 2. Through-hole component; 3. Column structure; 4. First sleeve structure; 5. Second sleeve structure; 6. Filler; 7. First slit groove; 8. Second slit groove; 9. Support; 10. Heat dissipation hole; 11. Limiting component. Detailed Implementation

[0038] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] like Figure 1-4 As shown, the present invention also provides a wire threading assembly, which includes:

[0041] The graphite sleeve 1 and the through-part 2 are provided. The graphite sleeve 1 has an internal cavity. The graphite sleeve 1 is sleeved on the outer periphery of at least a portion of the structure of the through-part 2, such that at least a portion of the through-part 2 passes through the internal cavity. One end of the pre-embedded carbon fiber is connected to one end of the through-part 2. The pre-embedded carbon fiber, the graphite sleeve 1, and the through-part 2 form an integral structure. The integral structure can pass into the furnace body from one end and exit from the other end of the furnace body.

[0042] This invention employs a structure combining a graphite sleeve and a through-feed component. The graphite sleeve is fitted around the outer periphery of the through-feed component, which connects to pre-embedded carbon fibers. This effectively protects the through-feed component as it passes through the furnace body. Because graphite is heat-resistant, it overcomes the shortcomings of existing technologies when passing through the furnace interior. Existing technologies use steel bars or lead wires, which melt at high temperatures, releasing impurities that contaminate the furnace atmosphere and affect product quality. This invention eliminates the need for pre-cooling and post-heating the furnace, significantly improving production efficiency. It also avoids injuries to personnel or equipment caused by steel bars or lead wires, improving safety. Therefore, it effectively improves product quality, increases production efficiency, prevents injuries to personnel or equipment, extends component lifespan, and reduces losses.

[0043] In some embodiments, the through-feed component 2 includes a column structure 3, a first sleeve structure 4, and a second sleeve structure 5. The first sleeve structure 4 is connected to one end of the column structure 3, and the second sleeve structure 5 is connected to the other end of the column structure 3. The graphite sleeve 1 is sleeved on the outer periphery of the column structure. In a cross-section perpendicular to the axis of the column structure 3, the cross-sectional area of ​​the first sleeve structure 4 (i.e., the cross-sectional area of ​​the sleeve structure through the center of the circle after it is rounded) is greater than the cross-sectional area of ​​the column structure 3, and the cross-sectional area of ​​the second sleeve structure 5 (i.e., the cross-sectional area of ​​the sleeve structure through the center of the circle after it is rounded) is greater than the cross-sectional area of ​​the column structure 3. Both the first sleeve structure 4 and the second sleeve structure 5 are flexible structures.

[0044] This is a preferred structural form of the threading component of the present invention. It can be effectively threaded into the internal cavity of the graphite sleeve through the column structure. The first and second sleeve structures can limit the graphite sleeve after threading. Since both sleeve structures are flexible structures, although their cross-sectional area is larger than that of the column structure, one of the sleeve structures can be squeezed by the graphite sleeve and fitted onto the outer periphery of the column structure. After fitting, the graphite sleeve is effectively limited by the sleeve structures at both ends to prevent the graphite sleeve from coming off the column structure. In particular, by filling the two sleeve structures with filler after fitting, the graphite sleeve can be effectively limited, so that the graphite sleeve, the column structure and the two sleeve structures form an integrated structure, completing the threading effect.

[0045] In some embodiments, in a cross-section perpendicular to the axis of the column structure 3, the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve 1 is greater than the cross-sectional area of ​​the column structure 3, the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve 1 is less than the cross-sectional area of ​​the first sleeve structure 4 (i.e., the cross-sectional area of ​​the sleeve structure through the center after it is rounded), and the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve 1 is less than the cross-sectional area of ​​the second sleeve structure 5 (i.e., the cross-sectional area of ​​the sleeve structure through the center after it is rounded).

[0046] This invention also allows the graphite sleeve to be effectively fitted onto the outer circumference of the cylindrical structure by having an inner circumferential wall cross-sectional area larger than that of the cylindrical structure. The inner circumferential wall cross-sectional area of ​​the graphite sleeve is smaller than the cross-sectional areas of the two sleeve structures, allowing the sleeve structures at both ends to effectively limit the graphite sleeve, preventing it from detaching. This creates an integrated structure between the graphite sleeve and the threading component, achieving the desired wire threading into the furnace body.

[0047] In some embodiments, the first body structure 4 is a hollow structure with an internal hollow interior, and the second body structure 5 is also a hollow structure with an internal hollow interior.

[0048] The inserting component 2 also includes a filler 6, of which there are at least two, one of which can fill the interior of the first sleeve structure 4 and the other of which can fill the interior of the second sleeve structure 5.

[0049] This is a further preferred structural form of the insertion component of the present invention. The two sleeve structures are hollow structures, and the filler is respectively filled into the hollow structures of the two sleeve structures to form internal support for the two sleeves, so as to effectively limit the graphite sleeve. The filler is used to fill the sleeve structure after the graphite sleeve is fitted onto the outer periphery of the column structure, but is not filled when the graphite sleeve is fitted onto the column structure from the end, so as to effectively ensure the effective and accurate fitting of the graphite sleeve.

[0050] In some embodiments, the column structure 3 is a flexible structure made of carbon fiber material, and the graphite sleeve 1 is made of graphite material.

[0051] Both the first housing structure 4 and the second housing structure 5 are flexible structures made of carbon fiber, and the filler 6 is also a flexible structure made of carbon fiber. The first housing structure 4 has a first slit groove 7 to allow the filler 6 to fill into the interior of the first housing structure 4, and the second housing structure 5 has a second slit groove 8 to allow the filler 6 to fill into the interior of the second housing structure 5.

[0052] This is a preferred structural form of the column structure, graphite sleeve, two sleeve structures, and filler of the present invention. The column structure, two sleeve structures, and filler are all flexible structures made of carbon fiber, which can effectively connect with the pre-embedded carbon fiber, and the flexible structure can facilitate the fitting and limiting of the graphite sleeve. The two slit grooves are used to fill the filler into the interior of the two sleeve structures.

[0053] In some embodiments, the column structure 3 is a cylindrical structure with a cross-sectional diameter of D1, the first sleeve structure 4 is a sphere, the second sleeve structure 5 is also a sphere, the diameters of the first sleeve structure 4 and the second sleeve structure 5 are both D2, and the graphite sleeve 1 is a cylindrical structure with an inner diameter of D3, where D3 > D1 and D3 < D2.

[0054] The filler 6 is a solid sphere with a diameter of D2.

[0055] This is the preferred dimensional relationship of the column structure, the two sleeve structures, the graphite sleeve, and the filler of the present invention. The column structure is preferably a cylinder, and the two sleeve structures are preferably spheres disposed at both ends of the cylinder to effectively limit the graphite sleeve of the cylindrical body disposed on the cylinder. Furthermore, D3 > D1 can effectively allow the graphite sleeve to be fitted onto the outer periphery of the column structure, and D3 < D2 can effectively ensure the limiting effect on the graphite sleeve through the sleeve structures at both ends, preventing the graphite sleeve from falling out. The filler is preferably a sphere with the same diameter as the sleeve structure to be effectively locked inside the sleeve structure, so that the sleeve structure is filled and expanded, thereby improving its limiting effect on the graphite sleeve.

[0056] In some embodiments, there are n graphite sleeves 1, where n is a natural number greater than or equal to 2. The n graphite sleeves 1 are sequentially fitted from the first sleeve structure 4 or the second sleeve structure 5 to the outer periphery of the column structure 3, and the n graphite sleeves 1 fitted to the outer periphery of the column structure 3 are sequentially connected to each other so as to completely enclose the column structure 3 inside the graphite sleeves 1.

[0057] The present invention also sets up multiple graphite sleeves and connects them in series to form a graphite sleeve chain. The number of graphite sleeves can be selected according to the length of the furnace body, which is convenient to use, applicable to furnace bodies of various specifications, improves its versatility, and is not limited by site and space, making it easy to assemble.

[0058] This invention designs a detachable, high-temperature resistant wire threading assembly. Carbon fiber cloth rods are sequentially threaded through hollow graphite sleeves to form a graphite sleeve chain. The number of graphite sleeves can be selected according to the furnace length, making it convenient to use and adaptable to various furnace sizes. It is not limited by site space, facilitates assembly, and avoids injury to personnel or equipment during wire threading.

[0059] The present invention also provides a wire threading furnace body device, which includes the aforementioned wire threading assembly and a furnace body. The wire threading assembly can be sequentially inserted into the furnace body from one end and exited from the other end of the furnace body. The length of the n graphite sleeves 1 is greater than the length of the furnace body.

[0060] This invention also utilizes a wire-threading furnace body device with multiple graphite sleeves, connected in series to form a graphite sleeve chain. The number of graphite sleeves can be selected according to the furnace body length, making it convenient to use and applicable to various furnace body specifications, improving its versatility. It is not limited by site or space and is easy to assemble. Furthermore, the graphite sleeves effectively protect the threaded components, overcoming the shortcomings of existing methods using steel bars or lead wires, which melt at high temperatures, releasing impurities that contaminate the furnace atmosphere and affect product quality. This invention also eliminates the need to cool the furnace body before heating it, significantly improving production efficiency and avoiding injuries to personnel or equipment caused by steel bars or lead wires, thus improving safety. Therefore, it effectively improves product quality, increases production efficiency, prevents injuries to personnel or equipment, extends component lifespan, and reduces losses.

[0061] In some embodiments, a support 9 is also included, which is disposed on the outside of the furnace body outlet and has a plurality of heat dissipation holes 10. The graphite sleeve 1 that extends through the furnace body can be mounted on the support 9. The present invention also enables the graphite sleeve after it has passed through the furnace body to be effectively mounted through the structure of the support, thereby dissipating heat from the graphite sleeve, and the multiple heat dissipation holes can enhance the heat dissipation effect of the graphite sleeve.

[0062] Preferably, the support 9 is further provided with a limiting component 11 to limit the graphite sleeve 1 and prevent the graphite sleeve from slipping off the support 9. The limiting component is preferably located on the support surface of the support and extends upward, and is more preferably made of stainless steel, and preferably there are multiple components.

[0063] Preferred embodiments of the present invention:

[0064] The present invention provides a detachable, high-temperature resistant wire threading assembly, comprising a column structure 3 (preferably a carbon fiber cloth soft rod), a filler 6 (preferably a carbon fiber cloth package), a hollow graphite sleeve 1, and a support 9.

[0065] The maximum furnace opening is x mm, and the outer diameter y of the graphite sleeve should be less than x to ensure that the graphite sleeve can enter the furnace opening. The length of the graphite sleeve is between 300 mm and 1500 mm. See attached document. Figure 1 .

[0066] Hollow graphite sleeves can be made of hydrostatic graphite, which has the characteristics of low ash content, low impurity content, high temperature resistance, corrosion resistance, light weight, and high mechanical strength.

[0067] The carbon fiber cloth rod has a diameter of D1, which is smaller than the inner diameter of the graphite sleeve (D3). The length of the carbon fiber cloth rod is 1.1 to 1.3 times the furnace body length. It has two sleeve structures at both ends (preferably hollow carbon fiber cloth sleeves). The cloth sleeves are circular, and their diameter D2 should be larger than the inner diameter of the graphite sleeve but smaller than the maximum opening of the furnace. The carbon fiber cloth sleeve has slits, the length of which is 2 to 3 mm smaller than the diameter of the carbon fiber cloth bundle. The carbon fiber cloth bundle is a solid, approximately spherical sphere with the same diameter as the cloth sleeve. In use, the carbon fiber cloth bundle is inserted into the slits at both ends of the carbon fiber cloth hose. (See attached document) Figure 2 .

[0068] Preferably, the bracket Y is made of steel, and the heat sink plate is 0.5–1 cm thick. The heat sink plate has ventilation holes with an opening rate of 40% and a hole diameter of 2–5 mm. Two 5 cm high "S"-shaped supports are located at the 1 / 2, 1 / 6, and 5 / 6 positions on the heat sink plate to prevent the graphite sleeve from rolling off or being damaged. Two isosceles triangular legs, 10–15 cm above the ground, are placed under the heat sink plate. (See attached document) Figure 3 .

[0069] The present invention also provides a wire threading method for the wire threading furnace body device as described above, wherein:

[0070] When the inserting component simultaneously includes a column structure 3, a first sleeve structure 4, a second sleeve structure 5, and a filler 6:

[0071] The threading method includes:

[0072] The assembly step involves sequentially placing n graphite sleeves 1 onto the outer periphery of the column structure 3, and then filling the filler 6 into the first sleeve structure 4 and the second sleeve structure 5 respectively.

[0073] In the threading step, the assembled graphite sleeve 1 and threading component 2 are threaded into the furnace body from the furnace outlet and out of the furnace inlet. After threading, the pre-embedded carbon fiber is connected to the sleeve structure that has already exited (the sleeve structure that has already exited refers to the first sleeve structure or the second sleeve structure that exits from the furnace body first). Then, the threading assembly connected with the pre-embedded carbon fiber is pulled out from the furnace outlet, and the graphite sleeve 1 is placed on the support 9 for heat dissipation. The pre-embedded carbon fibers used for threading in this invention are all unsized carbon fibers to avoid the decomposition of the sizing agent by heat, which would generate waste gas that pollutes the furnace atmosphere.

[0074] The wire threading method of this invention overcomes the shortcomings of existing methods that use steel bars or lead wires, which melt at high temperatures, releasing impurities that contaminate the furnace and affect product quality. Furthermore, it eliminates the need to cool the furnace before heating it again, significantly improving production efficiency. It also avoids injuries to personnel or equipment caused by steel bars or lead wires, thus improving safety. This effectively improves product quality, increases production efficiency, prevents injuries to personnel or equipment, extends the lifespan of components, and reduces losses. It is also applicable to furnaces of various specifications, enhancing its versatility, and is not limited by site or space, facilitating assembly.

[0075] The preferred embodiment of the threading method of the present invention is as follows:

[0076] 1. According to the furnace body specifications, thread the carbon fiber cloth rods sequentially through n graphite sleeves. The length of n × the length of the graphite sleeves should be greater than the length of the furnace body (preferably, thread a 6-meter-long, 3-centimeter-diameter carbon fiber cloth rod sequentially through four 1.5-meter-long, Φ50 / Φ30 graphite sleeves). Finally, insert the carbon fiber cloth bundle into the slits at both ends of the carbon fiber cloth rod as plugs, ensuring the graphite sleeve chain is tightly connected and not loose. Ensure the plugs are secure and will not fall off into the hollow graphite sleeves under stress.

[0077] 2. The gas seal flow rate at the furnace inlet and outlet is opened to the maximum, and the furnace bars at the inlet and outlet are opened to the maximum. The furnace opening width is preferably 75 mm. Employees B, C, and D slowly push the graphite rod chains they have made into the furnace one by one from the furnace outlet. Employee A holds the pre-embedded carbon fiber at the furnace inlet and waits. When the head of the graphite rod chain extends out of the furnace body, the pre-embedded carbon fiber is quickly tied to the end cap for fixation.

[0078] 3. After securing the pre-embedded carbon fiber, employee B, wearing high-temperature resistant gloves, slowly pulls out the graphite rod chain. During this process, because the graphite rod chain will become hot when heated inside the furnace, employee B must pull it out slowly (to prevent burns to personnel or equipment). When pulling out a graphite rod, employees C and D are positioned at the graphite furnace outlet, wearing high-temperature resistant gloves, and holding wrench F to fix the graphite rod pulled out of the furnace chamber to prevent it from sliding or swinging. The carbon cloth bag is removed, and the hot graphite rod is left at the furnace outlet nozzle to dissipate heat naturally until it turns dark red. Then, employees C and D use clamping tools to move the graphite rod chain to the support.

[0079] 4. After the graphite bar chain is fully pulled out, it should be properly placed on the support, the furnace bars should be restored to their original state, the inlet and outlet air seal flow should be restored, and the threading operation of the pre-embedded carbon fiber should be completed.

[0080] 5. Use an infrared thermometer to measure the temperature of the graphite sleeve. After confirming that the graphite sleeve has completely cooled down, employees wearing high-temperature resistant gloves separate the carbon fiber cloth rod from the graphite sleeve and place it in the designated area.

[0081] 6. After the threading operation is completed, replace the carbon fiber that was just embedded in the furnace with new carbon fiber to avoid the air introduced during the threading operation reacting with the old embedded carbon fiber at high temperature, causing secondary breakage of the embedded carbon fiber (i.e., when the furnace opening is relatively large during threading, air enters the furnace body and the embedded carbon fiber is oxidized; after the embedded carbon fiber is threaded, install the furnace bars, and after the furnace opening is reduced, tie the embedded carbon fiber to the new carbon fiber, pull it from the other side of the furnace body, and replace it with unoxidized carbon fiber. It should be noted that the carbon fiber used for threading is all unsized carbon fiber to avoid the sizing agent decomposing under heat and generating exhaust gas that pollutes the atmosphere inside the furnace).

[0082] The beneficial effects of this invention are as follows:

[0083] 1. The number of graphite sleeves can be selected according to the furnace body length, making it convenient to use and adaptable to various furnace body specifications. The graphite rod chain is flexible, and the links can be bent, which is not limited by site space, making it easy to assemble and avoiding scratches or burns to personnel or equipment when passing through the furnace.

[0084] 2. Both this component and carbon fiber are composed of carbon elements with high purity. During the wire threading process, it avoids introducing impurities such as metals into the furnace, has less impact on the furnace atmosphere, shortens the furnace condition stabilization time, and reduces long-term quality fluctuations in the product.

[0085] 3. The wire threading assembly has low hardness, so it will not damage the inner wall of the furnace during the wire threading operation.

[0086] 4. The process of inserting pre-embedded carbon fiber can be completed in 20-30 minutes without the need for frequent heating and cooling, saving 4-6 days of heating and cooling time, improving production efficiency, ensuring supply capacity, and meeting customer needs in a timely manner.

[0087] 5. If the pre-embedded carbon fiber is accidentally broken during batch start-up, this method can be used to perform the threading operation without cooling, shortening the start-up and racking time, reducing carbon fiber waste, and indirectly increasing production output.

[0088] In this invention, carbon fiber cloth rods are sequentially threaded through several graphite sleeves. Finally, a carbon fiber cloth bundle is inserted into the slits at both ends of the carbon fiber cloth rod as a plug, and pre-embedded carbon fibers are tied on before threading through the furnace body. After the operation, the graphite sleeves are placed on a support. This invention has a simple structure, is easy to assemble, and allows for wire threading operations while the high-temperature furnace body is at its operating temperature. It is adaptable to various furnace sizes, is not limited by site space, avoids scratching personnel or equipment during wire threading, prevents the introduction of impurities, and improves the efficiency and safety of wire threading operations.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A thread assembly, characterized by: include: A graphite sleeve (1) and a through-hole component (2) are provided. The graphite sleeve (1) has an internal cavity. The graphite sleeve (1) is fitted around the outer periphery of at least a portion of the through-hole component (2), such that at least a portion of the through-hole component (2) passes through the internal cavity. One end of a pre-embedded carbon fiber is connected to one end of the through-hole component (2). The pre-embedded carbon fiber, the graphite sleeve (1), and the through-hole component (2) form an integral structure. The integral structure can pass into the furnace body from one end and exit from the other end of the furnace body. The through-fitting component (2) includes a column structure (3), a first sleeve structure (4), and a second sleeve structure (5). The first sleeve structure (4) is connected to one end of the column structure (3), and the second sleeve structure (5) is connected to the other end of the column structure (3). The graphite sleeve (1) is fitted around the outer periphery of the column structure. In a cross-section perpendicular to the axis of the column structure (3), the cross-sectional area of ​​the first sleeve structure (4) is greater than the cross-sectional area of ​​the column structure (3), and the cross-sectional area of ​​the second sleeve structure (5) is greater than the cross-sectional area of ​​the column structure (3).

2. The threading assembly according to claim 1, characterized in that: Both the first set of body structure (4) and the second set of body structure (5) are flexible structures.

3. The threading assembly according to claim 2, characterized in that: In a cross section perpendicular to the axis of the column structure (3), the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve (1) is greater than the cross-sectional area of ​​the column structure (3), the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve (1) is less than the cross-sectional area of ​​the first sleeve structure (4), and the cross-sectional area of ​​the inner peripheral wall of the graphite sleeve (1) is less than the cross-sectional area of ​​the second sleeve structure (5).

4. The threading assembly according to claim 3, characterized in that: The first set of body structure (4) is a hollow structure with an internal hollow interior, and the second set of body structure (5) is also a hollow structure with an internal hollow interior; The fitting component (2) further includes a filler (6), which is at least two, one of which can fill the interior of the first body structure (4), and the other of which can fill the interior of the second body structure (5).

5. The threading assembly according to claim 4, characterized in that: The column structure (3) is a flexible structure made of carbon fiber material, and the graphite sleeve (1) is made of graphite material; The first body structure (4) and the second body structure (5) are both flexible structures made of carbon fiber, and the filler (6) is also a flexible structure made of carbon fiber. The first body structure (4) has a first slit groove (7) to allow the filler (6) to fill into the interior of the first body structure (4), and the second body structure (5) has a second slit groove (8) to allow the filler (6) to fill into the interior of the second body structure (5).

6. The threading assembly according to claim 5, characterized in that: The column structure (3) is a cylindrical structure with a cross-sectional diameter of D1. The first sleeve structure (4) is a sphere, and the second sleeve structure (5) is also a sphere. The diameters of the first sleeve structure (4) and the second sleeve structure (5) are both D2. The graphite sleeve (1) is a cylindrical structure with an inner diameter of D3, and D3 > D1 and D3 < D2. The filler (6) is a solid sphere with a diameter of D2.

7. The threading assembly according to any one of claims 2-6, characterized in that: There are n graphite sleeves (1), where n is a natural number greater than or equal to 2. The n graphite sleeves (1) are sequentially fitted from the first sleeve structure (4) or the second sleeve structure (5) onto the outer periphery of the column structure (3), and the n graphite sleeves (1) fitted onto the outer periphery of the column structure (3) are sequentially connected to each other so as to completely enclose the column structure (3) inside the graphite sleeves (1).

8. A filament threading furnace apparatus, characterized by: The assembly includes the wire threading component as described in claim 7, and also includes a furnace body. The wire threading component is capable of being sequentially inserted into the furnace body from one end and exiting from the other end of the furnace body. The length of the n graphite sleeves (1) is greater than the length of the furnace body.

9. The wire-through furnace apparatus of claim 8, wherein: It also includes a bracket (9), which is located on the outside of the outlet of the furnace body, and the bracket (9) is provided with a plurality of heat dissipation holes (10). The graphite sleeve (1) that passes through the furnace body can be placed on the bracket (9).

10. A method for threading wire in a wire threading furnace body device as described in claim 9, characterized in that: When the inserting component simultaneously includes a column structure (3), a first body structure (4), a second body structure (5), and a filler (6): The threading method includes: In the assembly step, n graphite sleeves (1) are sequentially and grounded on the outer periphery of the column structure (3), and then the filler (6) is filled into the first sleeve structure (4) and the second sleeve structure (5) respectively. In the threading step, the assembled graphite sleeve (1) and the threading component (2) are threaded into the furnace body from the outlet of the furnace body and out from the inlet of the furnace body. After threading out, the pre-embedded carbon fiber is connected to the sleeve structure that has been threaded out first. Then, the threading assembly connected to the pre-embedded carbon fiber is pulled out from the outlet end of the furnace body, and the graphite sleeve (1) is placed on the bracket (9) for heat dissipation.

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