A conveying structure for composite yarn production

Abstract

The present invention relates to the technical field of conveying structures, and in particular to a conveying structure for composite wire production, comprising an alumina powder material conveying pipe and a silicon carbide powder material conveying pipe, wherein the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe are both provided with a lifting and stirring mechanism and a gas transmission extension mechanism; the lifting and stirring mechanism comprises a fixed pipe fixedly passing through the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe, each of the fixed pipes is provided with a lifting plate on the inner wall, each of the lifting plates is rotatably passed through a stirring shaft, and each of the stirring shafts is fixedly connected to the outer wall with a telescopic sleeve for stirring the alumina powder material or the silicon carbide powder material; the gas transmission extension mechanism comprises a movable groove provided on the upper and lower sides of the inner wall of the telescopic sleeve; the present invention can change the position of internal and external materials, improve preheating efficiency, improve subsequent composite efficiency, and prevent affecting subsequent production operations.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying structures, in particular to a conveying structure for composite yarn production. Background Art

[0002] Pneumatic conveyors use the principle of pneumatic conveying to efficiently and conveniently transport powdered materials from one location to another. Alumina powder is added during composite wire production to enhance the wear resistance, high temperature resistance and insulation of the composite wire, while silicon carbide powder is added to improve the hardness, wear resistance and thermal conductivity of the composite wire.

[0003] Preheating is necessary when conveying powdered raw materials. This allows the powder to absorb and store some energy, leaving it in a state between softened and unprocessed. This makes subsequent compounding easier and facilitates the processing. Increasing the preheating temperature within a reasonable range can also improve the mechanical properties of composite wire products.

[0004] At present, in the existing technology, during the production process of composite wire, the raw materials of the composite wire need to be transported, and during the pneumatic transportation process, the alumina raw materials and the silicon carbide raw materials need to be heated and preheated separately, and during the preheating process, only the raw materials in the conveying pipe are heated by the heating plate. Therefore, when heating the alumina raw materials and the silicon carbide raw materials, the weight of the raw materials inside the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe is different from the raw materials outside, resulting in the internal raw materials cannot be fully preheated, resulting in the solid raw materials blocking the subsequent processing steps during the transportation process, thereby affecting the transportation of the alumina raw materials and the silicon carbide raw materials, and then affecting the transportation efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a conveying structure for composite yarn production.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a conveying structure for composite yarn production, comprising an alumina powder material conveying pipe and a silicon carbide powder material conveying pipe, each of which is provided with a lifting and stirring mechanism and a gas supply extension mechanism;

[0007] The lifting and stirring mechanism includes a fixed tube fixedly passing through the alumina powder material conveying tube and the silicon carbide powder material conveying tube, the inner wall of each fixed tube is provided with a lifting plate, each lifting plate is rotatably passed through a stirring shaft, and the outer wall of each stirring shaft is fixedly connected to a telescopic sleeve for stirring the alumina powder material or the silicon carbide powder material;

[0008] The gas delivery extension mechanism includes movable grooves provided on the upper and lower sides of the inner wall of the telescopic sleeve, each inner wall of the movable groove is slidably connected to a movable block, and an extension plate is fixedly connected between each group of the movable blocks. It also includes a gas delivery channel arranged inside the stirring shaft, and the inner wall of each gas delivery channel is pierced with a plurality of air outlet holes, each of the air outlet holes extends to the interior of the telescopic sleeve, and the air outlet holes are used to deliver gas into between the telescopic sleeve and the extension plate, thereby pushing the extension plate to move outward and expanding the stirring area.

[0009] Preferably, the lifting and stirring mechanism also includes a fixed frame fixedly connected to the outer wall of the fixed tube, each fixed frame has a fixed plate fixedly connected to the bottom of the inner wall, each group of fixed plates and fixed frames have a hydraulic rod fixedly connected, each telescopic end of the hydraulic rod is fixedly connected to a connecting frame, and each connecting frame is fixedly connected to each lifting plate.

[0010] Preferably, the lifting and stirring mechanism also includes a second slide groove opened on both sides of the inner wall of the fixed tube, each group of the second slide groove inner walls are slidably connected with a first slider, each group of the first sliders and each lifting plate are fixedly connected respectively, and also includes a driving motor fixedly connected to the top of the inner wall of the connecting frame, each driving end of the driving motor is fixedly connected to the top of each stirring shaft respectively, and each bottom end of the stirring shaft is fixedly connected to a sealing plate.

[0011] Preferably, the gas extension mechanism also includes a circular cavity opened on the inner wall of the lifting plate, and an air inlet hole penetrated through the outer wall of the stirring shaft, the air inlet hole is used to connect the circular cavity and the gas channel, each of the fixed plates is fixedly connected to a limiting frame, and an air pipe is provided on the inner wall of each limiting frame, and each of the air pipes and each lifting plate is fixedly passed through respectively.

[0012] Preferably, a tension spring is symmetrically fixedly connected between each of the extension plates and the stirring shaft, and the tension spring is used to store the non-working extension plate into the telescopic sleeve.

[0013] Preferably, a feed pipe is fixedly passed through one side of the top of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe, a composite spinning component is fixedly connected to one end of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe, and multiple heating plates are fixedly connected to the outer walls of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe.

[0014] Preferably, the other ends of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe are fixedly connected to a U-shaped plate, an electric push rod is fixedly passed through the two U-shaped plates, and the telescopic ends of the two electric push rods are fixedly connected to a push plate.

[0015] Preferably, baffles are slidably passed through the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe, and the bottom of the two baffles near one end of the composite spinning component are fixedly connected to a limiting rod, and the top of the inner wall of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe near the baffle are provided with a limiting groove, and the top of the alumina powder material conveying pipe and the silicon carbide powder material conveying pipe near the baffle are fixedly connected with a three-stage cylinder, and the telescopic ends of the two three-stage cylinders are fixedly connected with a fixed block, and the two fixed blocks and the two baffles are fixedly connected respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the provided lifting and stirring mechanism, the stirring shaft and the telescopic sleeve can be extended into the alumina raw material or the silicon carbide raw material during the preheating process, so that the alumina raw material or the silicon carbide raw material can be stirred during the heating process, thereby changing the position of the internal and external raw materials and making the alumina raw material or the silicon carbide raw material better preheated, thereby ensuring that the conveyed alumina raw material or the silicon carbide raw material can better perform the subsequent compounding steps, thereby improving production efficiency and preventing the subsequent production operations from being affected;

[0018] 2. Through the provided gas delivery extension mechanism, gas can be input into the gas delivery channel, and the gas enters between the fixed sleeve and the extension plate through the gas outlet hole. When the internal gas pressure is greater than the tension of the tension spring, the extension plate extends from the fixed sleeve, thereby expanding the stirring range. Therefore, the preheating efficiency of the alumina raw material or silicon carbide raw material can be improved, thereby improving the subsequent production and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a conveying structure for composite yarn production according to the present invention;

[0020] Figure 2 This is a cross-sectional view of an alumina powder material conveying pipe of a conveying structure for composite wire production according to the present invention;

[0021] Figure 3 The present invention is a conveying structure for composite yarn production Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 The present invention is a conveying structure for composite yarn production Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 This is a cross-sectional view of a fixed pipe of a conveying structure for composite yarn production according to the present invention;

[0024] Figure 6This is a cross-sectional view of a lifting plate of a conveying structure for composite yarn production according to the present invention;

[0025] Figure 7 This is a cross-sectional view of a stirring shaft of a conveying structure for composite yarn production according to the present invention;

[0026] Figure 8 This is a structural display diagram of the alumina powder material conveying pipe of a conveying structure for composite wire production of the present invention.

[0027] In the figure: 1. Alumina powder material conveying pipe; 2. Silicon carbide powder material conveying pipe; 3. Fixed pipe; 4. Baffle; 5. Composite spinning assembly; 6. Fixed plate; 7. Fixed frame; 8. Heating plate; 9. Feeding pipe; 10. U-shaped plate; 11. Electric push rod; 12. Push plate; 13. Hydraulic rod; 14. Sealing plate; 15. Connecting frame; 16. Driving motor; 17. Air pipe; 18. Limiting frame; 19. Limiting rod; 21. Extension plate; 22. Stirring shaft; 23. Telescopic sleeve; 24. Lifting plate; 25. Circular cavity; 26. First slider; 27. Second slide groove; 28. Air delivery channel; 29. ​​Air inlet; 30. Tension spring; 31. Moving block; 32. Moving groove; 33. Air outlet; 34. Limiting groove; 35. Fixed block; 36. Three-stage cylinder. DETAILED DESCRIPTION

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0029] like Figures 1-8 A conveying structure for composite wire production shown in FIG. 1 includes an alumina powder material conveying pipe 1 and a silicon carbide powder material conveying pipe 2. During the conveying process, alumina powder and silicon carbide powder are respectively introduced together with high-pressure gas for conveyance. The alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 are both provided with a lifting and stirring mechanism and a gas transmission extension mechanism. The lifting and stirring mechanism can stir the raw materials in the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2, and alternately change the positions of the internal and external raw materials, thereby thoroughly preheating the alumina raw material or silicon carbide raw material, facilitating its conveying and avoiding blockage during conveyance. The provided gas transmission extension mechanism can expand the stirring range and accelerate the preheating efficiency of the alumina raw material or silicon carbide raw material.

[0030] like Figure 5 、 Figure 6As shown, the lifting and stirring mechanism includes a fixed tube 3 fixedly passing through the aluminum oxide powder material conveying tube 1 and the silicon carbide powder material conveying tube 2. The inner wall of each fixed tube 3 is provided with a lifting plate 24. A stirring shaft 22 is rotatably passed through each lifting plate 24. The outer wall of each stirring shaft 22 is fixedly connected to a telescopic sleeve 23 for stirring the aluminum oxide powder material or the silicon carbide powder material.

[0031] like Figure 6 、 Figure 7 As shown, the gas delivery extension mechanism includes movable grooves 32 provided on the upper and lower sides of the inner wall of the telescopic sleeve 23, and the inner wall of each movable groove 32 is slidably connected to a movable block 31, and an extension plate 21 is fixedly connected between each group of movable blocks 31. It also includes a gas delivery channel 28 arranged inside the stirring shaft 22, and the inner wall of each gas delivery channel 28 is pierced with a plurality of gas outlet holes 33, each gas outlet hole 33 extends to the interior of the telescopic sleeve 23, and the gas outlet holes 33 are used to deliver gas into between the telescopic sleeve 23 and the extension plate 21, thereby pushing the extension plate 21 to move outward and expand the stirring area.

[0032] like Figure 7 、 Figure 8 As shown, the lifting and stirring mechanism also includes a fixing frame 7 fixedly connected to the outer wall of the fixed tube 3. The bottom of the inner wall of each fixing frame 7 is fixedly connected to a fixing plate 6. A hydraulic rod 13 is fixedly connected between each set of fixing plates 6 and the fixing frame 7. The telescopic end of each hydraulic rod 13 is fixedly connected to a connecting frame 15. Each connecting frame 15 is fixedly connected to each lifting plate 24. The fixing frame 7 and the fixing plate 6 limit and fix the hydraulic rod 13 to ensure the stability of the hydraulic rod 13 during operation. The hydraulic rod 13 and the connecting frame 15 are fixed together, so that the hydraulic rod 13 can move up and down with the connecting frame 15, and thus with the lifting plate 24, to complete the extension and storage operation.

[0033] like Figure 3 、 Figure 6 As shown, the lifting and stirring mechanism also includes second chutes 27 opened on both sides of the inner wall of the fixed tube 3, and the inner wall of each set of second chutes 27 is slidably connected to the first slider 26, and each set of first sliders 26 is fixedly connected to each lifting plate 24. It also includes a drive motor 16 fixedly connected to the top of the inner wall of the connecting frame 15, and the driving end of each drive motor 16 is fixedly connected to the top of each stirring shaft 22, and the bottom of each stirring shaft 22 is fixedly connected to the sealing plate 14. The second chutes 27 and first sliders 26 can be provided to limit the lifting plate 24, so that the sealing plate 14 can be just received in the fixed tube 3, and the bottom of the sealing plate 14 is flush with the bottom of the fixed tube 3. The driving motor 16 drives the stirring shaft 22 to rotate and stir the raw materials.

[0034] like Figure 6 、 Figure 7As shown, the gas extension mechanism also includes a circular cavity 25 formed on the inner wall of the lifting plate 24 and an air inlet 29 formed on the outer wall of the stirring shaft 22. The air inlet 29 is used to connect the circular cavity 25 with the gas channel 28. A limit frame 18 is fixedly connected to each fixed plate 6. A gas pipe 17 is provided on the inner wall of each limit frame 18. Each gas pipe 17 is fixedly passed through each lifting plate 24. A tension spring 30 is symmetrically fixedly connected between each extension plate 21 and the stirring shaft 22. The tension spring 30 is used to retract the non-working extension plate 21 into the telescopic sleeve 23. The circular cavity 25 and air inlet 29 allow gas to enter the gas channel 28. The limit frame 18 limits the position of the gas pipe 17, and the gas pipe 17 moves up and down with the lifting plate 24. The tension spring 30 allows the extension plate 21 to be retracted into the telescopic sleeve 23 when the gas supply stops.

[0035] like Figure 1 As shown, a feed pipe 9 is fixedly inserted into one side of the top of the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2. A composite spinning assembly 5 is fixedly connected to one end of the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2. A plurality of heating plates 8 are fixedly connected to the outer walls of the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2. The feed pipe 9 is provided to respectively convey raw materials into the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2, and to convey preheated raw materials for the production of composite yarn, and the raw materials are heated by the heating plates 8.

[0036] like Figure 1 、 Figure 2 、 Figure 4 As shown, the other ends of the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 are fixedly connected to a U-shaped plate 10. Electric push rods 11 are fixedly passed through the two U-shaped plates 10. The telescopic ends of the two electric push rods 11 are fixedly connected to a push plate 12. The electric push rods 11 move the push plates 12, thereby allowing the preheated raw materials in the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 to be conveyed out.

[0037] like Figure 2 、 Figure 8As shown, a baffle 4 is slidably passed through the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2, and the bottom of the two baffles 4 near the composite spinning component 5 is fixedly connected to a limiting rod 19, and a limiting groove 34 is provided at the top of the inner wall of the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 near the baffle 4, and a three-stage cylinder 36 is fixedly connected to the top of the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 near the baffle 4, and the telescopic ends of the two three-stage cylinders 36 are fixedly connected to a fixed block 35, and the two fixed blocks 35 and the two baffles 4 are fixedly connected respectively. The baffle 4 provided can block the raw materials during preheating to prevent the outflow of raw materials that are not completely preheated and avoid blockage. The bottom of the baffle 4 can be made flush with the top of the inner wall of the alumina powder material conveying pipe 1 or the silicon carbide powder material conveying pipe 2 through the cooperation of the limiting rod 19 and the limiting groove 34, which facilitates the movement of the pushing plate 12. The fixed block 35 is moved up and down by the three-stage cylinder 36, thereby moving the baffle 4 up and down.

[0038] Working principle: First, the alumina powder material and the silicon carbide powder material are fed to the alumina powder material feeding pipe 1 and the silicon carbide powder material feeding pipe 2 respectively through the feeding pipe 9 on the alumina powder material feeding pipe 1 and the silicon carbide powder material feeding pipe 2, and then the electric push rod 11 is started to push the push plate 12 to move towards the baffle 4, and the raw materials are placed between the push plate 12, the baffle 4 and the alumina powder material feeding pipe 1 or the silicon carbide powder material feeding pipe 2, and at this time, the heating plate 8 is started to preheat the raw materials between the alumina powder material feeding pipe 1 and the silicon carbide powder material feeding pipe 2;

[0039] Then, the hydraulic rod 13 is started to push the connecting frame 15 and the lifting plate 24 downward, thereby moving the stirring shaft 22 and the sealing plate 14 downward, and making the telescopic sleeve 23 completely extend from the fixed tube 3. At this time, the drive motor 16 is started to rotate the stirring shaft 22 and the telescopic sleeve 23, so that the raw materials in the aluminum oxide powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 can be stirred, so that the positions of the raw materials inside and the raw materials outside can be exchanged, so that the raw materials can be better preheated and completely preheated, thereby improving the subsequent compounding efficiency and preventing the subsequent production operations from being affected.

[0040] During the stirring process, gas is delivered to the circular cavity 25 through the gas pipe 17. At this time, the gas enters the gas delivery channel 28 through the gas inlet 29, and then enters between the telescopic sleeve 23 and the extension plate 21 through the gas outlet 33. When the gas pressure between the telescopic sleeve 23 and the extension plate 21 is greater than the tension of the tension spring 30, the extension plate 21 extends from the telescopic sleeve 23, thereby expanding the stirring range and performing position exchange over a wider range, thereby speeding up the preheating process of the raw materials and improving the preheating efficiency, thereby improving the subsequent production and processing efficiency;

[0041] After the preheating is completed, the gas supply is stopped. At this time, the elasticity of the tension spring 30 causes the extension plate 21 to be stored in the telescopic sleeve 23, and at the same time, the hydraulic rod 13 is started in reverse to move the connecting frame 15 and the lifting plate 24 upward. Due to the presence of the first slider 26 and the second slide groove 27, the sealing plate 14 can be just stored in the fixed tube 3 and flush with the bottom of the fixed tube 3. At this time, the three-stage cylinder 36 is started to move the fixed block 35 upward, so that the baffle 4 can be moved upward, and the limiting rod 19 is stuck in the limiting groove 34 to complete the limiting processing of the baffle 4. At this time, the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 are in a completely opened state. At this time, the electric push rod 11 is started and the push plate 12 continues to move, so that the raw materials in the alumina powder material conveying pipe 1 and the silicon carbide powder material conveying pipe 2 can be pushed into the composite spinning component 5, and the composite yarn can be produced through the composite spinning component 5.

[0042] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveying structure for composite wire production, comprising an alumina powder material conveying pipe (1) and a silicon carbide powder material conveying pipe (2), characterized in that: The alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) are both provided with a lifting and stirring mechanism and a gas delivery extension mechanism; The lifting and stirring mechanism comprises a fixed tube (3) fixedly passing through the alumina powder material conveying tube (1) and the silicon carbide powder material conveying tube (2), the inner wall of each fixed tube (3) being provided with a lifting plate (24), a stirring shaft (22) being rotatably passed through each lifting plate (24), and a telescopic sleeve (23) for stirring the alumina powder material or the silicon carbide powder material being fixedly connected to the outer wall of each stirring shaft (22); The gas delivery extension mechanism includes a moving groove (32) provided on the upper and lower sides of the inner wall of the telescopic sleeve (23), the inner wall of each moving groove (32) is slidably connected to a moving block (31), and an extension plate (21) is fixedly connected between each group of the moving blocks (31). It also includes a gas delivery channel (28) provided inside the stirring shaft (22), the inner wall of each gas delivery channel (28) is provided with a plurality of gas outlet holes (33), and each gas outlet hole (33) extends into the interior of the telescopic sleeve (23). The gas outlet holes (33) are used to deliver gas between the telescopic sleeve (23) and the extension plate (21), thereby pushing the extension plate (21) to move outward and expanding the stirring area; The lifting and stirring mechanism further comprises a fixing frame (7) fixedly connected to the outer wall of the fixing tube (3), and a fixing plate (6) is fixedly connected to the bottom of the inner wall of each fixing frame (7); The gas delivery extension mechanism further includes a circular cavity (25) formed on the inner wall of the lifting plate (24), and an air inlet hole (29) formed on the outer wall of the stirring shaft (22), wherein the air inlet hole (29) is used to connect the circular cavity (25) and the gas delivery channel (28), and each of the fixed plates (6) is fixedly connected to a limit frame (18), and an air delivery pipe (17) is provided on the inner wall of each limit frame (18), and each of the air delivery pipes (17) and each of the lifting plates (24) is fixedly passed through. A tension spring (30) is symmetrically fixedly connected between each extension plate (21) and the stirring shaft (22), and the tension spring (30) is used to store the non-working extension plate (21) into the interior of the telescopic sleeve (23).

2. A conveying structure for composite yarn production according to claim 1, characterized in that: A hydraulic rod (13) is fixedly connected between each set of the fixed plates (6) and the fixed frames (7), a telescopic end of each hydraulic rod (13) is fixedly connected to a connecting frame (15), and each connecting frame (15) is fixedly connected to each lifting plate (24).

3. A conveying structure for composite yarn production according to claim 2, characterized in that: The lifting and stirring mechanism further includes second chutes (27) provided on both sides of the inner wall of the fixed tube (3), the inner wall of each group of the second chutes (27) is slidably connected to a first slider (26), each group of the first slider (26) is fixedly connected to each lifting plate (24), and further includes a driving motor (16) fixedly connected to the top of the inner wall of the connecting frame (15), the driving end of each driving motor (16) is fixedly connected to the top of each stirring shaft (22), and the bottom end of each stirring shaft (22) is fixedly connected to a sealing plate (14).

4. The conveying structure for composite yarn production according to claim 1, characterized in that: A feed pipe (9) is fixedly passed through one side of the top end of the alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2); one end of the alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) is fixedly connected to a composite spinning assembly (5); and the outer walls of the alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) are fixedly connected to multiple heating plates (8).

5. The conveying structure for composite yarn production according to claim 1, characterized in that: The other ends of the aluminum oxide powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) are both fixedly connected to a U-shaped plate (10), an electric push rod (11) is fixedly passed through the two U-shaped plates (10), and the telescopic ends of the two electric push rods (11) are both fixedly connected to a push plate (12).

6. The conveying structure for composite yarn production according to claim 1, characterized in that: The alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) are both slidably penetrated by a baffle (4), and the bottom of one end of the two baffles (4) close to the composite spinning assembly (5) is fixedly connected to a limiting rod (19), and the top of the inner wall of the alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) near the baffle (4) is provided with a limiting groove (34), and the top of the alumina powder material conveying pipe (1) and the silicon carbide powder material conveying pipe (2) near the baffle (4) is fixedly connected to a three-stage cylinder (36), and the telescopic ends of the two three-stage cylinders (36) are fixedly connected to a fixed block (35), and the two fixed blocks (35) and the two baffles (4) are fixedly connected respectively.

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