Multi-layer tubular furnace

Abstract

The utility model provides a multi-layer tubular furnace which comprises a support, the support is connected with a furnace body, two or more tube bodies are arranged in the furnace body in a penetrating mode, the tube bodies are arranged in parallel from top to bottom, and the tube bodies penetrate out of the two ends of the furnace body. Two ends of the pipe body are respectively connected with an end cover, the end cover is provided with a threading channel, the end cover is connected with an air pipe joint, and the air pipe joint is connected with an air pipe. The support is connected with adjustable guide wheel mechanisms, the adjustable guide wheel mechanisms are arranged at the two ends of the pipe body respectively, the adjustable guide wheel mechanisms and the pipe body are correspondingly arranged, and the adjustable guide wheel mechanisms guide fibers to penetrate into the pipe body. By arranging the multiple layers of parallel tube bodies, fiber folding and wire moving are achieved, the length of a single tube of the tube body is shortened, the occupied space of the tubular furnace is reduced, and the equipment flexibility is improved. The two groups of adjustable guide wheel mechanisms located on the two sides of the pipe body guide fibers to penetrate into the pipe body, fiber abrasion and deviation are reduced, and the fiber quality is improved.

Description

A multi-layer tube furnace Technical Field

[0001] This utility model belongs to the field of tube furnace technology, specifically relating to a multi-layer tube furnace. Background Technology

[0002] To improve the mechanical properties or surface characteristics of limiting materials, high-temperature treatment is typically employed, involving high-temperature sintering of fibers in a tube furnace. The fiber structure is stabilized by controlling the temperature and residence time. In traditional tube furnace designs, to ensure sufficient fiber reaction at high temperatures, long sintering tubes are required to extend the fiber's residence time within the furnace. For example, some processes require fibers to remain in a high-temperature tube furnace at 300-800℃ for approximately 30 seconds, resulting in sintering tubes reaching tens of meters in length, occupying significant production space and limiting the flexibility of equipment layout. Longer tube furnaces also increase the difficulty of threading the fibers, and fiber breakage can affect production continuity and efficiency.

[0003] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a multi-layer tube furnace with multiple sintering tubes to realize fiber folding and spinning, shorten the length of the sintering tubes, reduce the space occupied by the tube furnace, and improve the flexibility of the equipment.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a multi-layer tube furnace, including a support frame connected to a furnace body. Two or more tubes are inserted through the furnace body, arranged parallel from top to bottom, and exiting from both ends of the furnace body. End caps are connected to both ends of the tubes, each end cap having a threading channel and a gas pipe connector connected to it. The support frame is connected to two sets of adjustable guide wheel mechanisms, each located at one end of the tube, corresponding to the tube. The adjustable guide wheel mechanisms guide fibers through the tubes. During production, the adjustable guide wheel mechanisms guide fibers through the tubes from one end cap and out from the other end cap. The fibers then bypass the adjustable guide wheel mechanism, pass through the other adjustable guide wheel mechanism below, and exit from the other side of the tube, again being guided through the two adjustable guide wheel mechanisms. This invention utilizes a multi-layered parallel tube structure to achieve fiber folding and feeding, shortening the length of a single tube, reducing the footprint of the tube furnace, and improving equipment flexibility. Two sets of adjustable guide rollers located on both sides of the tube guide the fibers through the tube, reducing fiber wear and misalignment, and improving fiber quality.

[0006] Furthermore, in the aforementioned multi-layer tube furnace, the adjustable guide wheel mechanism includes a base, which is fixedly connected to a support. An adjusting frame is connected to the base, and the adjusting frame is connected to the guide wheel. The adjusting frame includes a first cylinder, a second cylinder, and a third cylinder. The first cylinder is adjustablely connected to the base, the first and second cylinders are adjustablely connected via a first connecting block, and the second and third cylinders are adjustablely connected via a second connecting block. Through the vertical combination of the first, second, and third cylinders, the guide wheel can be flexibly adjusted in three degrees of freedom (horizontal, vertical, and longitudinal), adapting to different tube position requirements and improving the flexibility and adaptability of the guide wheel.

[0007] Furthermore, in the aforementioned multi-layer tubular furnace, the first cylinder is horizontally positioned, the second cylinder is perpendicular to the first cylinder, and the third cylinder is perpendicular to the second cylinder. The first and second connecting blocks have identical structures. The first connecting block is rectangular, with a first connecting hole and a second connecting hole at each end. The axis of the first connecting hole is perpendicular to the axis of the second connecting hole. The first connecting block also has a first through groove and a second through groove at each end, connected to the first connecting hole. The first through groove is aligned with the axis of the first connecting hole, and the second through groove is aligned with the axis of the second connecting hole. Threaded through holes and countersunk through holes are provided on both sides of the first and second through grooves. The axis of the first connecting hole is perpendicular to the axis of the second connecting hole, ensuring that the first, second, and third cylinders are perpendicular in all directions and can be adjusted independently. Bolts can be inserted into the threaded through holes and countersunk through holes to reduce the spacing between the through grooves, achieving a locking effect. The adjustment method is flexible, and the fixation is reliable.

[0008] Furthermore, in the aforementioned multi-layer tube furnace, the outer periphery of the guide roller is provided with a guide groove, the cross-section of which is V-shaped or U-shaped. The V-shaped guide groove (or U-shaped guide groove) can effectively restrict the fiber position, prevent fiber slippage, and ensure production stability.

[0009] Furthermore, in the aforementioned multi-layer tubular furnace, an insulation box is installed inside the furnace body, and the side walls of the insulation box are made of high-temperature resistant lightweight silicate blocks. Lightweight silicate material has low density and excellent heat insulation performance, which can reduce heat loss, improve energy consumption, and reduce the overall weight of the furnace body, making it easier to handle and maintain.

[0010] Furthermore, in the aforementioned multi-layer tubular furnace, heating tubes are connected to the inner wall of the insulation box. These heating tubes are arranged parallel to the tube body, and both ends are secured to the inner wall of the insulation box using elastic clips. The elastic clips are made of elastic material, and this connection method allows for quick assembly and disassembly of the heating tubes, while also resisting thermal expansion and contraction, thus extending their service life.

[0011] Furthermore, in the aforementioned multi-layer tubular furnace, the elastic clip includes a base connected to the inner wall of the insulation box, and clamping portions integrally connected to both ends of the base. An arc-shaped limiting portion is provided in the middle section of the clamping portion, and the heating tube is clamped to the arc-shaped limiting portion. Through holes are provided at the ends of the clamping portions away from the base, and fasteners are inserted into the through holes. The arc-shaped limiting portion fits tightly against the surface of the heating tube to prevent loosening.

[0012] Furthermore, in the aforementioned multi-layer tubular furnace, the furnace body is equipped with a temperature sensing rod, which is inserted into the insulation box. The temperature sensing rod monitors the internal temperature of the insulation box in real time, reducing temperature deviation.

[0013] Furthermore, in the aforementioned multi-layer tube furnace, the heating tubes are quartz heating tubes, and the inner wall of the heating tubes is coated with a gold coating, which is located on the side away from the tube body. The gold coating reflects infrared radiation, directionally transfers heat, reduces heat loss to the furnace wall, improves heating efficiency, and reduces energy consumption.

[0014] Furthermore, in the aforementioned multi-layer tube furnace, the tube body is preferably made of quartz glass. Quartz glass is heat-resistant and does not react with most reactants, ensuring purity. It also allows for easy observation of fiber changes from the outside, facilitating the setting of process conditions.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: The multi-layer tube furnace of this utility model, with its multi-layer parallel tubes, achieves fiber folding and feeding, shortens the length of a single tube, reduces the space occupied by the tube furnace, and improves equipment flexibility. Shortening the length of the tube furnace allows for rapid adjustment of the furnace temperature, reducing heat loss and energy consumption. Two sets of adjustable guide roller mechanisms located on both sides of the tube guide the fiber through the tube, reducing fiber wear and misalignment, and improving fiber quality. Through the vertical combination of the first, second, and third cylinders, the guide rollers achieve flexible adjustment in three degrees of freedom (horizontal, vertical, and longitudinal), adapting to different tube position requirements and improving the flexibility and adaptability of the guide rollers. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of the multi-layer tube furnace of this utility model;

[0017] Figure 2 is a magnified view of a portion of Figure 1;

[0018] Figure 3 is a schematic diagram of the structure of the first connecting block;

[0019] Figure 4 is a cross-sectional view of the multi-layer tube furnace of this utility model;

[0020] Figure 5 is a schematic diagram of the elastic buckle.

[0021] In the diagram: 1. Support, 2. Furnace body, 3. Tube body, 4. End cap, 41. Gas pipe connector, 5. Adjustable guide wheel mechanism, 51. Base, 521. First cylinder, 522. Second cylinder, 523. Third cylinder, 524. First connecting block, 5241. First connecting hole, 5242. Second connecting hole, 5243. First through groove, 5244. Second through groove, 525. Second connecting block, 53. Guide wheel, 531. Guide groove, 6. Insulation box, 7. Heating tube, 8. Elastic buckle, 81. Base, 82. Clamping part, 821. Arc-shaped limiting part, 822. Through hole, 9. Temperature detection rod. Detailed Implementation

[0022] Example 1

[0023] As shown in Figure 1, a multi-layer tubular furnace includes a support 1, to which a furnace body 2 is connected. Tubes 3 are threaded through the furnace body 2, with two or more tubes 3 arranged parallel from top to bottom, extending from both ends of the furnace body 2. End caps 4 are connected to both ends of the tubes 3, each end cap having a threading channel and a gas pipe connector 41 connected to a gas pipe. The support 1 is connected to two sets of adjustable guide wheel mechanisms 5, located at both ends of the tubes 3. These mechanisms correspond to the tubes 3 and guide fibers through the tubes 3.

[0024] In this embodiment, the tube body 3 is preferably made of quartz glass.

[0025] As shown in Figure 2, the multi-layer tube furnace includes an adjustable guide wheel mechanism 5 comprising a base 51 fixedly connected to a support 1. An adjusting frame is connected to the base 51, and the adjusting frame is connected to the guide wheel 53. The adjusting frame includes a first cylinder 521, a second cylinder 522, and a third cylinder 523. The first cylinder 521 is tunably connected to the base 51. The first cylinder 521 and the second cylinder 522 are tunably connected via a first connecting block 524, and the second cylinder 522 and the third cylinder 523 are tunably connected via a second connecting block 525. Through the vertical combination of the first cylinder 521, the second cylinder 522, and the third cylinder 523, the guide wheel 53 can be flexibly adjusted in three degrees of freedom (horizontal, vertical, and longitudinal), adapting to the different positions of the tubes 3 and improving the flexibility and adaptability of the guide wheel.

[0026] In this embodiment, the first cylinder 521 is horizontally arranged, the second cylinder 522 is perpendicular to the first cylinder 521, and the third cylinder 523 is perpendicular to the second cylinder 522. The first connecting block 524 and the second connecting block 525 have the same structure. The first connecting block 524 is rectangular, and its two ends are respectively provided with a first connecting hole 5241 and a second connecting hole 5242. The axis of the first connecting hole 5241 is perpendicular to the axis of the second connecting hole 5242. The two ends of the first connecting block 524 are respectively provided with a first through groove 5243 and a second through groove 5244. The first through groove 5243 and the first connecting hole 5241 are connected and the first through groove 5243 is arranged along the axis of the first connecting hole 5241. The second through groove 5244 and the second connecting hole 5242 are connected and the second through groove 5244 is arranged along the axis of the second connecting hole 5242. Threaded through holes and countersunk through holes are respectively provided on both sides of the first through groove 5243 and the second through groove 5244. The axis of the first connecting hole 5241 is set perpendicular to the axis of the second connecting hole 5242, ensuring that the first cylinder 521, the second cylinder 522, and the third cylinder 523 are perpendicular in all directions and can be adjusted independently. Bolts can be inserted into the threaded through holes and countersunk through holes to reduce the spacing of the through slots and achieve the purpose of locking. The adjustment method is flexible and the fixation is reliable.

[0027] In this embodiment, the guide wheel 53 has a guide groove 531 on its outer periphery, and the cross-section of the guide groove 531 is V-shaped (or U-shaped). The fiber is wound inside the V-shaped guide groove (or U-shaped guide groove) 531.

[0028] As shown in Figure 3, the multi-layer tube furnace has an insulation box 6 inside the furnace body 2. The side wall of the insulation box 6 is made of high-temperature resistant lightweight silicate blocks.

[0029] In this embodiment, a heating pipe 7 is connected to the inner wall of the heat insulation box 6. The heating pipe 7 is arranged parallel to the pipe body 3, and both ends of the heating pipe 7 are fastened to the inner wall of the heat insulation box 6 by elastic clips 8. The elastic clips 8 are made of elastic material. The connection method of the elastic clips 8 enables the heating pipe 7 to be quickly installed and removed, and can resist the thermal expansion and contraction of the heating pipe 7, thus extending its service life.

[0030] In this embodiment, the heating tube 7 is a quartz heating tube, and the inner wall of the heating tube 7 is coated with a gold coating, which is located on the side away from the tube body 3. The gold coating reflects infrared radiation towards the tube body 3, reducing heat loss to the furnace wall.

[0031] In this embodiment, the furnace body 2 is equipped with a temperature sensing rod 9, which is inserted into the heat insulation box 6. The temperature sensing rod 9 monitors the internal temperature of the heat insulation box 6 in real time, and the system adjusts the heating power of the heating tube 7 based on the detection data to reduce temperature deviation.

[0032] As shown in Figure 4, the multi-layer tubular furnace has an elastic buckle 8 comprising a base 81 connected to the inner wall of the insulation box 6, and clamping portions 82 integrally connected to both ends of the base 81. An arc-shaped limiting portion 821 is provided in the middle of the clamping portion 82, and the heating tube 7 is clamped to the arc-shaped limiting portion 821. Through holes 822 are provided at the ends of the clamping portions 82 away from the base 81, and fasteners are inserted into the through holes 822. The arc-shaped limiting portion 821 is tightly fitted to the surface of the heating tube 7 to prevent loosening.

[0033] This utility model is used in the production of the following steps: the end cap 4 is sealed and connected to both ends of the tube body 3, gas is injected into the tube body 3 through the gas pipe connector 41, and the air in the tube body 3 is purged.

[0034] Adjust the positions of the first cylinder 521, the second cylinder 522, and the third cylinder 523, and loosen the fasteners in the threaded holes on the side of the first through groove 5243 and the second through groove 5244 provided in the first connecting block 524 and the second connecting block 5 in sequence. Move the second cylinder 522 and the third cylinder 523, and adjust the first cylinder 521 in the same way so that the upper edge of the guide wheel 53 is directly opposite the center of the tube body 3.

[0035] Threading: The fiber is wound around the guide wheel 53 at one end of the uppermost tube 3, and guided by a metal wire, it enters the tube 3 from one end cap and exits from the other end cap 4. The fiber then passes around the other guide wheel 53 of the tube 3, and through the corresponding guide wheel 53 on the same side of the middle tube 3. Guided by a metal wire, the fiber enters the tube 3 from the end cap 4 on that side of the middle tube 3, exits from the other side of the tube 3, passes around the other guide wheel 53 of the middle tube 3 and the guide wheel 52 on the same side of the bottom tube 3, and enters the lower tube 3 using a metal wire. It then exits from the other side of the tube 3, passes around the other guide wheel 52, and proceeds to the next process. The control system controls the heating tube 7 to heat the tube, and the temperature detection rod 9 monitors the internal temperature of the insulation box 6 in real time. The system adjusts the heating power of the heating tube 7 based on the data detected by the temperature detection rod 9 to ensure stable furnace temperature.

[0036] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A multi-stage tube furnace characterized by: The device includes a support (1), which is connected to a furnace body (2). A tube (3) is inserted through the furnace body (2). There are two or more tubes (3). The tubes (3) are arranged in parallel from top to bottom and extend from both ends of the furnace body (2). End caps (4) are connected to both ends of the tubes (3). The end caps (4) are provided with wire passages. The end caps (4) are connected to air pipe connectors (41). The air pipe connectors (41) are connected to air pipes. The support (1) is connected to two sets of adjustable guide wheel mechanisms (5). The adjustable guide wheel mechanisms (5) are respectively located at both ends of the tubes (3). The adjustable guide wheel mechanisms (5) are correspondingly arranged with the tubes (3). The adjustable guide wheel mechanisms (5) guide the fibers to pass through the tubes (3).

2. The multi-stage tube furnace according to claim 1, characterized in that: The adjustable guide wheel mechanism (5) includes a base (51), which is fixedly connected to the bracket (1). The base (51) is connected to an adjustment frame, which is connected to the guide wheel (53). The adjustment frame includes a first cylinder (521), a second cylinder (522), and a third cylinder (523). The first cylinder (521) and the base (51) are tunably connected. The first cylinder (521) and the second cylinder (522) are tunably connected through a first connecting block (524). The second cylinder (522) and the third cylinder (523) are tunably connected through a second connecting block (525).

3. The multi-stage tube furnace according to claim 2, characterized in that: The first cylinder (521) is horizontally positioned, the second cylinder (522) is perpendicular to the first cylinder (521), and the third cylinder (523) is perpendicular to the second cylinder (522). The first connecting block (524) and the second connecting block (525) have the same structure. The first connecting block (524) is rectangular, and its two ends are respectively provided with a first connecting hole (5241) and a second connecting hole (5242). The axis of the first connecting hole (5241) is perpendicular to the axis of the second connecting hole (5242). The connecting block (524) has a first through groove (5243) and a second through groove (5244) at both ends. The first through groove (5243) and the first connecting hole (5241) are connected. The first through groove (5243) is arranged along the axis of the first connecting hole (5241). The second through groove (5244) and the second connecting hole (5242) are connected. The second through groove (5244) is arranged along the axis of the second connecting hole (5242). The first through groove (5243) and the second through groove (5244) have threaded through holes and countersunk through holes on both sides.

4. The multi-stage tube furnace according to claim 3, characterized in that: The guide wheel (53) has a guide groove (531) on its outer periphery, and the cross-section of the guide groove (531) is V-shaped or U-shaped.

5. The multi-stage tube furnace of claim 1, wherein: The furnace body (2) is equipped with a heat insulation box (6), and the side wall material of the heat insulation box (6) is made of high temperature resistant lightweight silicate block.

6. The multi-layer tube furnace according to claim 5, characterized in that: The inner wall of the heat insulation box (6) is connected to a heating pipe (7). The heating pipe (7) is arranged parallel to the pipe body (3). Both ends of the heating pipe (7) are fastened to the inner wall of the heat insulation box (6) by elastic buckles (8).

7. The multi-layer tube furnace according to claim 6, characterized in that: The elastic buckle (8) includes a base (81) connected to the inner wall of the heat insulation box (6) and a clamping part (82) integrally connected to both ends of the base (81). The clamping part (82) has an arc-shaped limiting part (821) in the middle section, and the heating tube (7) is clamped to the arc-shaped limiting part (821). The clamping part (82) has a through hole (822) at one end away from the base (81), and a fastener is inserted in the through hole (822).

8. The multi-layer tube furnace according to claim 5, characterized in that: The furnace body (2) is equipped with a temperature detection rod (9), which is inserted into the heat insulation box (6).

9. The multi-stage tube furnace according to claim 6, characterized in that: The heating tube (7) is a quartz heating tube, and the inner wall of the heating tube (7) is coated with a gold coating, which is located on the side away from the tube body (3).

10. The multi-stage tube furnace of claim 1, wherein: The tube body (3) is made of quartz glass.

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