Special production equipment for carbon fiber spinning composite material

Abstract

The invention relates to the technical field of carbon fiber spinning composite material production, and discloses a special production device for a carbon fiber spinning composite material, the special production device comprises a pre-oxidation furnace and a carbonization furnace, the pre-oxidation furnace is located on the horizontal left side of the carbonization furnace, and an unwinding roller is installed on the horizontal left side of the pre-oxidation furnace; a plurality of groups of polyacrylonitrile tows on the unwinding roller penetrate through the inner rotary drum seat to enter an oxidation chamber of the pre-oxidation furnace; and an inlet and an outlet are respectively formed in the middle positions of the left end surface and the right end surface of the carbonization furnace. According to the special production equipment for the carbon fiber spinning composite material, the pressure wheel on the anti-shrinkage structure makes contact with the lower end face of the polyacrylonitrile tow, the tension spring sequentially acts on the pressure wheel, the polyacrylonitrile tow is expanded, and therefore the shrinkage amount of the polyacrylonitrile tow is counteracted; meanwhile, the air outlet short pipes are evenly distributed on the two sides of the anti-shrinkage structure, direct air blown upwards directly acts on the lower end face of the polyacrylonitrile tow, and stretching and expansion of the linear polyacrylonitrile tow are assisted.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber spinning composite material production, and in particular to special production equipment for carbon fiber spinning composite material. Background Art

[0002] Carbon fiber thermosetting resin composite materials are made of carbon fiber cloth as the skeleton and thermosetting resin as the matrix through advanced composite technology. They have the dual characteristics of carbon fiber and resin materials. Carbon fiber is an emerging fiber material with extremely high strength and rigidity, high temperature and high pressure resistance, corrosion and ablation resistance. It is widely used in aerospace, military, sports and leisure and industrial fields due to its excellent performance, and the demand is growing rapidly. Carbon fiber composite materials are a fibrous carbon material with a carbon content of more than 80%. They are made of organic fiber-polyacrylonitrile (PAN) fiber precursor through a series of process processes such as pre-oxidation, carbonization, surface treatment, and spinning. Special production equipment will be used in the pre-oxidation and carbonization steps.

[0003] There are many technical problems in the use of existing special production equipment for carbon fiber spinning composite materials. First, the polyacrylonitrile fiber bundles discharged from the unwinding roller carry a large amount of static electricity. Because the fibers are dry, friction between the fibers is easy to generate heat, resulting in broken fibers and affecting the subsequent oxidation process. Second, the heating in the oxidation furnace will cause the fibers to shrink physically. During the heating pre-oxidation process, the fibers will undergo a series of chemical reactions such as cyclization, oxidation and dehydrogenation. These exothermic reactions will release a large amount of energy, which may cause the fiber temperature to rise further. The further rise in temperature makes the fiber shrink more violently, further This results in a decrease in the uniformity and quality of the fibers; thirdly, when the fiber bundles are heated at high temperatures in the pre-oxidation furnace and the carbonization furnace, waste gases such as hydrogen cyanide (HCN), ammonia (NH3), carbon monoxide (CO), and carbon dioxide (CO2) are produced. Direct discharge of these waste gases into the external environment will cause pollution; fourthly, since there is a gap between the inlet and outlet of the carbonization furnace for the movement of the fiber bundles, the environment outside the furnace and the environment inside the furnace are connected, and oxygen can easily enter the carbonization furnace from the gap, causing the carbon elements in the fiber bundles to be oxidized and detached by oxygen, thereby causing the fibers to lose part of their carbon elements, reducing the structural strength and thermal stability of the fibers.

[0004] In summary, considering that the existing facilities cannot meet the work requirements, we propose a special production equipment for carbon fiber spinning composite materials. Summary of the invention

[0005] The main purpose of the present invention is to provide a special production equipment for carbon fiber spinning composite materials, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A special production equipment for carbon fiber spinning composite materials, comprising a pre-oxidation furnace and a carbonization furnace, wherein the pre-oxidation furnace is located on the horizontal left side of the carbonization furnace, and a discharging roller is installed on the horizontal left side of the pre-oxidation furnace. Multiple groups of polyacrylonitrile bundles on the discharging roller pass through an inner drum seat and enter an oxidation chamber of the pre-oxidation furnace. An inlet and an outlet are respectively provided at the middle positions of the left and right end faces of the carbonization furnace. The multiple groups of polyacrylonitrile bundles pass through the oxidation chamber, the inlet and the high-temperature carbonization chamber of the carbonization furnace in turn, and are led out from the outlet. The polyacrylonitrile bundles are preferably 4-10 groups.

[0007] As a preferred solution of the special production equipment of a carbon fiber spinning composite material described in the present invention, a constant temperature hot air blower is installed at the bottom of the pre-oxidation furnace and below the oxidation chamber, a porous joint is installed at the middle position of the upper end surface of the constant temperature hot air blower, two groups of first hot air connecting pipes are symmetrically connected to the porous joint in the front-to-back direction, the upper end of each group of the first hot air connecting pipes is connected to a hot air cross pipe, the hot air cross pipe is installed on the inner wall of the oxidation chamber, and a plurality of groups of hot air holes are evenly opened on the inner side surface of the hot air cross pipe, and the two groups of hot air cross pipes are symmetrically distributed on both sides of the multiple groups of polyacrylonitrile bundles.

[0008] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, wherein: a plurality of groups of second hot air connecting tubes are symmetrically connected to the porous joint in the left and right directions, the upper end of each group of the second hot air connecting tubes is connected to a horizontal diversion main pipe, the number of the second hot air connecting tubes and the horizontal diversion main pipes is preferably 4-6 groups, and a plurality of groups of short air outlet pipes are equidistantly installed at the upper end of each group of the horizontal diversion main pipes, the short air outlet pipes extend upward into the oxidation chamber, and each group of the polyacrylonitrile filament bundles is located directly above the short air outlet pipes.

[0009] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a positioning seat is fixedly installed at the middle position of the bottom of the oxidation chamber, and anti-shrinkage structures acting on the polyacrylonitrile bundles are equidistantly installed on the positioning seat.

[0010] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a long connecting seat is arranged between the top of the pre-oxidation furnace and the carbonization furnace, an air suction device is installed at the middle position of the long connecting seat, a small air suction pipe is installed on one group of interfaces in the air suction device, the small air suction pipe extends downward into the oxidation chamber, and the lower end of the small air suction pipe is connected to a No. 1 air suction hood.

[0011] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a large suction pipe is installed on another set of interfaces in the suction device, and the large suction pipe extends downward into the high-temperature carbonization chamber of the carbonization furnace, and the lower end of the large suction pipe is connected to a No. 2 suction hood.

[0012] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a support seat is installed on the upper end surface of the long connecting seat and located on the right side of the air suction device, an inert gas tank is placed on the support seat, and a gas filling pipe is connected to the gas outlet of the inert gas tank, and the gas filling pipe passes through the long connecting seat downward into the high-temperature carbonization chamber of the carbonization furnace.

[0013] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, an outer cylinder seat is arranged on the outer side of the inner rotating cylinder seat, the right end portion of the outer cylinder seat is fixed on the left end face of the pre-oxidation furnace, the outer cylinder seat and the inner rotating cylinder seat are connected by two groups of inner bearings, a large gear is sleeved on the outside of the inner rotating cylinder seat and located between the two groups of inner bearings, a small gear is meshed on one side of the large gear, the small gear is sleeved on the output shaft of the uniform speed motor, and the uniform speed motor is horizontally installed on the left end face of the pre-oxidation furnace.

[0014] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, wherein: a cavity is opened inside the inner rotating drum seat, and an ion air duct and an atomizer are respectively installed on the cavity walls of the cavity, and a plurality of groups of ion air holes acting on the polyacrylonitrile bundle are equidistantly opened on the tube surface of the ion air duct, and the number of the ion air holes is preferably 10-20 groups, and a plurality of groups of atomization holes acting on the polyacrylonitrile bundle are evenly opened on the end surface of the atomizer, and a water adding cover is arranged on the end of the atomizer away from the atomization hole extending out of the inner rotating drum seat.

[0015] As a preferred solution of the special production equipment for the carbon fiber spinning composite material described in the present invention, the anti-shrinkage structure includes a fixed column, a sliding sleeve, an L-shaped slider, a slide groove, a tension spring, a bracket, a tensioning groove and a pressure wheel, the fixed column is vertically welded on the positioning seat, the upper end of the fixed column is sleeved with a sliding sleeve, and the lower end surface of the sliding sleeve is evenly welded with several groups of L-shaped sliders, the outer surface of the fixed column is provided with slide grooves for the L-shaped slider to move up and down respectively, and the number of the L-shaped sliders and slide grooves is preferably 3-4 groups, and a tension spring sleeved on the outside of the fixed column is fixedly connected between the positioning seat and the several groups of L-shaped sliders, the upper end of the sliding sleeve is vertically connected with a bracket, the top of the bracket is provided with a tensioning groove for accommodating the polyacrylonitrile bundle, and a pressure wheel in contact with the polyacrylonitrile bundle is installed inside the bracket, and a part of the pressure wheel extends out of the tensioning groove.

[0016] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a pre-annular air seat is installed on the upper end surface of the long connecting seat and located on the left side of the air intake device, the pre-annular air seat includes an outer sealing shell seat, a top cover, an air compressor, an air duct and a spiral preheating coil, the inner layer of the outer sealing shell seat is filled with thermal insulation material, a top cover is fixed to the upper end of the outer sealing shell seat, an air compressor is installed in the middle position of the top cover, a spiral preheating coil is arranged around the inner side of the outer sealing shell seat and located below the top cover, an air storage chamber is formed around the inner side of the spiral preheating coil, and two groups of air ducts are symmetrically connected to the bottom of the air storage chamber, each group of the air ducts extends downward and is connected to a constant temperature hot air blower, and the air duct guides the hot air from the air storage chamber into the constant temperature hot air blower.

[0017] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, wherein: the upper end of the spiral preheating coil is connected to an air intake pipe, the air intake pipe extends horizontally to the right into the interior of the air intake device, and a booster pump is installed on the air intake pipe. The lower end of the spiral preheating coil is divided into two joints, each group of joints is connected to an air outlet pipe, and the two groups of the air outlet pipes are symmetrical parts, the air outlet pipes extend outward and are connected to the exhaust gas processor, and the exhaust gas processors are symmetrically fixed in two groups at the edge of the upper end surface of the pre-oxidation furnace.

[0018] As a preferred solution of the special production equipment of a carbon fiber spinning composite material described in the present invention, the exhaust gas processor includes an exhaust gas channel seat, a flow channel is horizontally opened inside the exhaust gas channel seat, and a plurality of waste liquid holes are opened at the middle position of the bottom of the flow channel. The left end of the flow channel extends outward and is connected to an exhaust short pipe, and the right end of the flow channel is provided with an exhaust pipe extending therein, and an absorption liquid tank is fixedly installed on the upper end surface of the pre-oxidation furnace and located on the left side of the long connecting seat, and a main liquid supply pipe is installed at the bottom of the absorption liquid tank, and the main liquid supply pipe extends into the interior of the long connecting seat, and a plurality of groups of branch pipes are equidistantly installed on the front and rear sides of the main liquid supply pipe, and each group of branch pipes extends horizontally into the flow channel, and a spray head acting on the exhaust gas is installed at the end of the branch pipe.

[0019] As a preferred solution of the special production equipment of a carbon fiber spinning composite material described in the present invention, wherein: the lower side of the exhaust gas channel seat is connected to a limiting track, a long tooth rod is horizontally movably arranged in the limiting track, the right end of the long tooth rod is connected to a cylinder rod, the cylinder rod extends horizontally outward from the inside of the telescopic cylinder, the telescopic cylinder is installed on the upper end surface of the pre-oxidation furnace, and rotating gears are equidistantly meshed on the long tooth rod. The number of rotating gears is preferably 5-8 groups, and several groups of the rotating gears are located in the exhaust gas channel seat, and a rotating roller is arranged above each group of the rotating gears, and roller shafts are welded to the upper and lower ends of the rotating rollers, and each group of the roller shafts is fixed by a bearing seat and the inner wall of the exhaust gas channel seat, the rotating gear is sleeved on the roller shaft at the lower position, and a deceleration baffle is riveted on the roller shaft, and several groups of the deceleration baffles are equidistantly arranged in the flow channel.

[0020] As a preferred solution of the special production equipment of a carbon fiber spinning composite material described in the present invention, wherein: several groups of oxygen-blocking structures acting on the polyacrylonitrile bundle are equidistantly installed at the positions of the inlet and outlet, two groups of capillaries extending outward are symmetrically connected at the left and right gas outlets of the inert gas tank, and the lower end of each group of the capillaries is connected to a diversion cross pipe, and the diversion cross pipe is horizontally installed on the carbonization furnace, and the lower end of the diversion cross pipe is equidistantly connected to several groups of pressurized pipes, each group of the pressurized pipes is respectively connected downward to the oxygen-blocking structure, and each group of the pressurized pipes is installed with an electromagnetic pulse valve.

[0021] As a preferred scheme of the special production equipment of a carbon fiber spinning composite material described in the present invention, the oxygen-barrier structure includes a sealing shell, a pressure port, a wheel frame, a guide wheel, a ventilation gap, an upper gap and a lower gap, the sealing shell is sealed and installed at the inlet and outlet positions, a pressure port is opened at the middle position of the upper end surface of the sealing shell, the pressure port and the lower end of the pressure tube are sealed and connected, two groups of wheel frames are obliquely symmetrically screwed inside the sealing shell, each group of wheel frames is equipped with a guide wheel acting on the polyacrylonitrile bundle, a ventilation gap for the movement of the polyacrylonitrile bundle is opened in the middle of the sealing shell, the ventilation gap is connected to the pressure port, an upper gap for the movement of the polyacrylonitrile bundle is opened at the upper left side of the sealing shell, and a lower gap for the movement of the polyacrylonitrile bundle is opened at the lower right side of the sealing shell, and the upper gap and the lower gap are both connected to the ventilation gap.

[0022] As a preferred solution of the special production equipment for the carbon fiber spinning composite material described in the present invention, a burner is arranged at the lower end of the carbonization furnace, and the burner heats the high-temperature carbonization chamber of the carbonization furnace, and the heating temperature is between 1200-1600°C.

[0023] As a preferred solution of the special production equipment for carbon fiber spinning composite material described in the present invention, control valves are respectively installed on the small suction pipe and the large suction pipe.

[0024] As a preferred solution of the special production equipment for carbon fiber spinning composite material described in the present invention, one-way valves are installed on both groups of air guide pipes.

[0025] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, a dark flow channel is arranged below the several groups of waste liquid holes, the end of the dark flow channel is connected to a waste liquid discharge pipe, and the waste liquid discharge pipe passes through the right end surface of the pre-oxidation furnace and extends outward.

[0026] As a preferred solution of the special production equipment for carbon fiber spinning composite material described in the present invention, a large opening is provided through the outer cylinder seat for the small gear to extend into.

[0027] As a preferred solution of the special production equipment for carbon fiber spinning composite material described in the present invention, alkaline absorption liquid is placed in the absorption liquid tank, and a pressurized water pump is installed in the absorption liquid tank.

[0028] As a preferred solution of the special production equipment for the carbon fiber spinning composite material described in the present invention, a surface treatment mechanism is arranged on the horizontal right side of the carbonization furnace, and the multiple groups of polyacrylonitrile tows enter the surface treatment mechanism after carbonization.

[0029] As a preferred solution of the special production equipment for a carbon fiber spinning composite material described in the present invention, the oxygen barrier structures on the inlet and outlet are connected to the high-temperature carbonization chamber of the carbonization furnace through the upper gap, and connected to the outside air through the lower gap.

[0030] The present invention provides a special production equipment for carbon fiber spinning composite materials through improvement, which has the following significant improvements and advantages compared with the prior art: The uniform speed motor is started, and the inner drum seat is rotated inside the outer drum seat through transmission. The ion air duct is opened first to generate ion wind which is discharged from several groups of ion air holes to eliminate the static charge on the polyacrylonitrile bundle. The ion air duct makes a circular motion to achieve the purpose of uniformly eliminating static electricity. Then the atomizer starts to work and discharges atomized liquid from the atomizing hole. The atomized liquid adheres to the polyacrylonitrile bundle, which can reduce the dryness of the bundle and the friction of the fibers between the bundles. The atomizer makes a circular motion to achieve the purpose of uniform humidification, improve the subsequent oxidation effect, and enable the inner drum seat to integrate different functions and simplify the equipment structure.

[0031] The pressure wheel on the anti-shrinkage structure contacts the lower end surface of the polyacrylonitrile bundle, and the tension spring acts on the pressure wheel in turn to expand the polyacrylonitrile bundle, thereby offsetting the shrinkage of the polyacrylonitrile bundle. At the same time, the short air outlet pipes are evenly distributed on both sides of the anti-shrinkage structure, and straight air is blown upward to directly act on the lower end surface of the polyacrylonitrile bundle, assisting the linear stretching and expansion of the polyacrylonitrile bundle. The combination of the two ensures the uniformity and quality of the oxidation of the polyacrylonitrile yarn and solves the problem of thermal shrinkage of the fiber.

[0032] Turn on the booster pump to generate suction to press the high-temperature gas in the suction device into the intake pipe, and then flow into the spiral preheating coil along the intake pipe. The high-temperature gas flows in the spiral pipeline of the spiral preheating coil for a long time, fully contacts the compressed air in the air storage chamber, transfers its own heat to the compressed air, and the compressed air becomes preheated air, which significantly improves the heat conduction effect. The preheated air enters the air duct and is continuously injected into the constant temperature hot air blower through the air duct. The constant temperature hot air blower is used to heat the preheated air for a second time, and the hot air is produced to supply the oxidation chamber, so as to achieve the purpose of recycling heat, save energy, protect the environment, and reduce costs.

[0033] After the exhaust gas is cooled, it flows from right to left in the flow channel. The pressurized water pump in the absorption liquid tank is turned on to pump the alkaline absorption liquid into the main liquid supply pipe, and then flows into several groups of branch pipes respectively, and is sprayed out through the spray head to fully contact with the exhaust gas moving in the flow channel to neutralize the acidic gas in the gas, thereby solving the problem of exhaust gas polluting the environment. At the same time, the telescopic cylinder is turned on to drive the long tooth rod to make a straight line reciprocating motion in the limit track, causing the rotating gear to rotate, so that the roller drives the deceleration baffle to swing. During the swinging process, each group of deceleration baffles frequently collides with the gas in the flow channel to achieve a deceleration effect, prolonging the flow time of the cooling gas in the flow channel, thereby improving the absorption efficiency of the exhaust gas.

[0034] A small amount of inert gas in the inert gas tank enters the capillary, the diversion cross pipe and the pressurizing pipe in turn, and is instantly injected into the narrow ventilation gap from the pressurizing port, causing the pressure in the ventilation gap to increase instantly, squeezing the air in the oxygen barrier structure and causing it to be discharged from the lower gap. This cycle is repeated so that there is always a strength difference between the inside and outside of the lower gap, ensuring that no air enters the oxygen barrier structure from the outside, achieving an anti-oxygen sealing effect, avoiding oxidation of carbon elements, and improving the quality of the finished carbon fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of one direction of a special production equipment for carbon fiber spinning composite materials of the present invention; Figure 2 It is a schematic diagram of the overall structure of another direction of a special production equipment for carbon fiber spinning composite material of the present invention; Figure 3It is a schematic diagram of the external structure of the outer cylinder seat of the present invention; Figure 4 It is a schematic diagram of the internal structure of the outer cylinder seat of the present invention; Figure 5 is a cross-sectional view of a pre-oxidation furnace of the present invention; Figure 6 It is a top view schematic diagram of the long connecting seat of the present invention; Figure 7 It is a bottom view schematic diagram of the long connecting seat of the present invention; Figure 8 This is a schematic diagram of the external pipe connection of the constant temperature hot air blower of the present invention; Fig. 9 It is a schematic structural diagram of the anti-shrinkage structure of the present invention in one direction; Fig.10 It is a schematic structural diagram of the anti-shrinkage structure of the present invention in another direction; Fig.11 This is a schematic diagram of the internal structure of the pre-annular air seat of the present invention; Fig.12 is a cross-sectional view of the exhaust gas processor of the present invention; Fig.13 It is a schematic diagram of the transmission structure of the long toothed rod of the present invention; Fig.14 It is a schematic diagram of the external connection of the oxygen barrier structure of the present invention; Fig.15 It is a cross-sectional view of the oxygen barrier structure of the present invention.

[0036] In the figure: 1, pre-oxidation furnace; 2, carbonization furnace; 3, unwinding roller; 4, polyacrylonitrile tow; 5, inlet; 6, outlet; 9, oxygen barrier structure; 91, sealing shell; 92, pressurization port; 93, wheel frame; 94, guide wheel; 95, ventilation gap; 96, upper gap; 97, lower gap; 10, outer cylinder seat; 11, inner rotating cylinder seat; 12, inner bearing; 13, large gear; 14, small gear; 15, uniform speed motor; 16, cavity; 17, ion air duct; 18, atomizer; 19, atomization hole; 20, Oxidation chamber; 21. Constant temperature hot air blower; 22. Multi-hole joint; 23. First hot air connecting pipe; 24. Hot air horizontal pipe; 25. Hot air hole; 26. Second hot air connecting pipe; 27. Horizontal diversion main pipe; 28. Short air outlet pipe; 29. ​​Anti-shrinkage structure; 291. Fixed column; 292. Sliding sleeve; 293. L-shaped slider; 294. Slide; 295. Tension spring; 296. Bracket; 297. Tensioning groove; 298. Pressure wheel; 30. Long connecting seat; 31. Support seat; 32. Inert gas tank; 33. Gas filling pipe; 34. Air suction device; 35. Small air suction pipe; 36. No. 1 air suction hood; 37. Large air suction pipe; 38. No. 2 air suction hood; 40. Pre-annular air seat; 41. External sealing shell seat; 42. Top cover; 43. Air compressor; 44. Air guide pipe; 45. Spiral preheating coil; 46. Inlet pipe; 47. Booster pump; 48. Exhaust pipe; 50. Exhaust gas processor; 51. Exhaust channel seat; 52. Flow channel; 53. Exhaust short pipe; 54. Absorption liquid tank; 55. Main liquid supply pipe; 56. Branch pipe; 57, spray head; 58, waste liquid hole; 60, limit track; 61, long tooth rod; 62, cylinder rod; 63, telescopic cylinder; 64, rotating gear; 65, rotating roller; 66, roller shaft; 67, bearing seat; 68, deceleration baffle; 70, capillary air tube; 71, diversion cross pipe; 72, pressurizing pipe; 73, electromagnetic pulse valve; 80, burner; 81, control valve; 82, one-way valve; 83, waste liquid discharge pipe; 84, opening; 85, water filling cover; 86, positioning seat; 87, ion air hole. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0038] like Figure 1-13As shown, this embodiment provides a special production equipment for carbon fiber spinning composite materials, including a pre-oxidation furnace 1 and a carbonization furnace 2, the pre-oxidation furnace 1 is located on the horizontal left side of the carbonization furnace 2, and a discharging roller 3 is installed on the horizontal left side of the pre-oxidation furnace 1. Multiple groups of polyacrylonitrile bundles 4 on the discharging roller 3 pass through the inner drum seat 11 and enter the oxidation chamber 20 of the pre-oxidation furnace 1. An inlet 5 and an outlet 6 are respectively opened in the middle position of the left and right end faces of the carbonization furnace 2, and multiple groups of polyacrylonitrile bundles 4 pass through the oxidation chamber 20, the inlet 5 and the high-temperature carbonization chamber of the carbonization furnace 2 in turn, and are discharged outward from the outlet 6.

[0039] Among them, an outer cylinder seat 10 is arranged outside the inner cylinder seat 11, and the right end of the outer cylinder seat 10 is fixed on the left end surface of the pre-oxidation furnace 1, and the outer cylinder seat 10 and the inner cylinder seat 11 are connected by two sets of inner bearings 12. Figure 1 , 3 and 4.

[0040] Among them, a large gear 13 is sleeved outside the inner drum seat 11 and located between the two sets of inner bearings 12. A small gear 14 is meshed with one side of the large gear 13. An opening 84 for the small gear 14 to extend into is provided on the outer drum seat 10. The small gear 14 is sleeved on the output shaft of the uniform speed motor 15. The uniform speed motor 15 is horizontally installed on the left end surface of the pre-oxidation furnace 1. Figure 3 and 4 shown.

[0041] Furthermore, a cavity 16 is provided inside the inner drum seat 11, and an ion air duct 17 and an atomizer 18 are respectively installed on the cavity wall of the cavity 16, and the installation positions of the two can be adjusted according to actual conditions, such as Figure 3 and 4 shown.

[0042] Among them, a plurality of groups of ion air holes 87 acting on the polyacrylonitrile bundle 4 are evenly spaced on the tube surface of the ion air duct 17, such as Figure 3 shown.

[0043] Among them, a plurality of groups of atomizing holes 19 acting on the polyacrylonitrile bundle 4 are evenly opened at the end surface of the atomizer 18, and one end of the atomizer 18 away from the atomizing holes 19 extends out of the inner drum seat 11 and is provided with a water adding cover 85. The water adding cover 85 can be opened to add pure water into the atomizer 18. Figure 3 and 4 shown.

[0044] Furthermore, a constant temperature hot air blower 21 is installed at the bottom of the pre-oxidation furnace 1 and below the oxidation chamber 20. The constant temperature hot air blower 21 has a constant temperature controller, such as Figure 6 and 8 shown.

[0045] Among them, a porous joint 22 is installed at the middle position of the upper end surface of the constant temperature hot air blower 21, and two groups of first hot air connecting pipes 23 are symmetrically connected to the porous joint 22 in the front-to-back direction. The upper end of each group of first hot air connecting pipes 23 is connected to a hot air transverse pipe 24, and the hot air transverse pipe 24 is installed on the inner wall of the oxidation chamber 20. The inner side surface of the hot air transverse pipe 24 is evenly opened with a plurality of groups of hot air holes 25. The two groups of hot air transverse pipes 24 are symmetrically distributed on both sides of the multiple groups of polyacrylonitrile tows 4, such as Figure 6 and 8 shown.

[0046] Among them, a plurality of groups of second hot air connecting pipes 26 are symmetrically connected to the porous joint 22 in the left and right directions, and the upper end of each group of second hot air connecting pipes 26 is connected to a horizontal diversion main pipe 27, and a plurality of groups of short air outlet pipes 28 are equidistantly installed at the upper end of each group of horizontal diversion main pipes 27, and the short air outlet pipes 28 extend upward into the oxidation chamber 20, and each group of polyacrylonitrile tows 4 are respectively located directly above the short air outlet pipe 28, such as Figure 5-8 shown.

[0047] Furthermore, a positioning seat 86 is fixedly installed at the middle position of the bottom of the oxidation chamber 20, and anti-shrinkage structures 29 acting on the polyacrylonitrile tow 4 are equidistantly installed on the positioning seat 86, such as Figure 5 shown.

[0048] Specifically, the anti-shrinkage structure 29 includes a fixed column 291, a sliding sleeve 292, an L-shaped slider 293, a sliding groove 294, a tension spring 295, a bracket 296, a tensioning groove 297 and a pressure wheel 298. Fig. 9 and 10 shown.

[0049] In this embodiment, the fixed column 291 is vertically welded on the positioning seat 86, and the upper end of the fixed column 291 is sleeved with a sliding sleeve 292. The sliding sleeve 292 is movable within the upper limit of the fixed column 291. A plurality of groups of L-shaped sliders 293 are evenly welded on the lower end surface of the sliding sleeve 292. The outer surface of the fixed column 291 is provided with sliding grooves 294 for the L-shaped sliders 293 to move up and down respectively. A tension spring 295 sleeved on the outside of the fixed column 291 is fixedly connected between the positioning seat 86 and the plurality of groups of L-shaped sliders 293. The tension spring 295 is used to provide tension.

[0050] In this embodiment, the upper end of the sliding sleeve 292 is vertically connected to a bracket 296, and a tensioning groove 297 for accommodating the polyacrylonitrile bundle 4 is opened at the top of the bracket 296. A pressure wheel 298 in contact with the polyacrylonitrile bundle 4 is installed inside the bracket 296. A part of the pressure wheel 298 extends out of the tensioning groove 297, and the pressure wheel 298 plays a dual role of guiding pressure.

[0051] Furthermore, a long connecting seat 30 is provided between the top of the pre-oxidation furnace 1 and the carbonization furnace 2, and an air suction device 34 is installed in the middle of the long connecting seat 30. Figure 1 , 2 and 6.

[0052] In this embodiment, a small suction pipe 35 is installed on one of the interfaces in the suction device 34, and the small suction pipe 35 extends downward into the oxidation chamber 20. The lower end of the small suction pipe 35 is connected to a suction cover 36, which has the function of gathering gas. Figure 6 and 7 shown.

[0053] In this embodiment, a large suction pipe 37 is installed on another set of interfaces in the suction device 34. The large suction pipe 37 extends downward into the high-temperature carbonization chamber of the carbonization furnace 2. The lower end of the large suction pipe 37 is connected to a second suction hood 38, which has the function of gathering gas. Figure 6 and 7 shown.

[0054] In this embodiment, a control valve 81 is installed on the small suction pipe 35 and the large suction pipe 37 respectively. Figure 2 shown.

[0055] Furthermore, a support seat 31 is installed on the upper end surface of the long connecting seat 30 and is located on the right side of the air suction device 34. An inert gas tank 32 is placed on the support seat 31. A cheap inert gas is selected. A gas filling pipe 33 is connected to the gas outlet of the inert gas tank 32. A solenoid valve is installed on the gas filling pipe 33 to play a control role. The gas filling pipe 33 passes through the long connecting seat 30 downward and enters the high-temperature carbonization chamber of the carbonization furnace 2, such as Figure 1 , 2 and 6.

[0056] Furthermore, a pre-annular air seat 40 is installed on the upper end surface of the long connecting seat 30 and on the left side of the air suction device 34, such as Figure 1 shown.

[0057] Specifically, the pre-annular air seat 40 includes an outer sealing shell seat 41, a top cover 42, an air compressor 43, an air guide pipe 44 and a spiral preheating coil 45. Figure 7 and 11 shown.

[0058] In this embodiment, the inner layer of the outer sealed shell seat 41 is filled with insulation material to play a role in heat preservation. A top cover 42 is fixed to the upper end of the outer sealed shell seat 41, and an air compressor 43 is installed in the middle position of the top cover 42. A spiral preheating coil 45 is arranged around the inner side of the outer sealed shell seat 41 and below the top cover 42. The inner side of the spiral preheating coil 45 is surrounded by an air storage chamber. The air compressor 43 compresses and stores the air in the air storage chamber. Two groups of air guide pipes 44 are symmetrically connected to the bottom of the air storage chamber. Each group of air guide pipes 44 extends downward and is connected to the constant temperature hot air blower 21. The air guide pipes 44 guide the hot air from the air storage chamber into the constant temperature hot air blower 21. Both groups of air guide pipes 44 are installed with one-way valves 82 to control the one-way flow of preheated air.

[0059] The upper end of the spiral preheating coil 45 is connected to an air intake pipe 46, which extends horizontally to the right into the interior of the air intake device 34. A booster pump 47 is installed on the air intake pipe 46. Figure 6 shown.

[0060] The lower end of the spiral preheating coil 45 is divided into two joints, each set of joints is connected to an outlet pipe 48, and the two sets of outlet pipes 48 are symmetrical parts. The outlet pipes 48 extend outward and are connected to the exhaust gas processor 50. The exhaust gas processor 50 is symmetrically fixed at the edge of the upper end surface of the pre-oxidation furnace 1 in two sets. Figure 6 shown.

[0061] Specifically, the exhaust gas processor 50 includes an exhaust gas channel seat 51, such as Fig.12 shown.

[0062] Among them, a flow channel 52 is horizontally opened inside the waste gas channel seat 51, and a plurality of waste liquid holes 58 are opened at the middle position of the bottom of the flow channel 52. Underflow channels are arranged below the plurality of waste liquid holes 58. The end of the underflow channel is connected to a waste liquid discharge pipe 83. The waste liquid discharge pipe 83 extends outward through the right end surface of the pre-oxidation furnace 1. The left end of the flow channel 52 extends outward and is connected to an exhaust short pipe 53. The right end of the flow channel 52 is provided for the outlet pipe 48 to extend into. Fig.12 shown.

[0063] Among them, an absorption liquid tank 54 is fixedly installed on the upper end surface of the pre-oxidation furnace 1 and located on the left side of the long connecting seat 30. Alkaline absorption liquid is placed in the absorption liquid tank 54. A pressurized water pump is installed in the absorption liquid tank 54. A main liquid supply pipe 55 is installed at the bottom of the absorption liquid tank 54. The main liquid supply pipe 55 plays a role in evenly distributing the liquid. The main liquid supply pipe 55 extends into the interior of the long connecting seat 30. A plurality of groups of branch pipes 56 are equidistantly installed on the front and rear sides of the main liquid supply pipe 55. Each group of branch pipes 56 extends horizontally into the flow channel 52. A spray head 57 acting on the exhaust gas is installed at the end of the branch pipe 56. Figure 7 and 12 shown.

[0064] Furthermore, the lower side of the exhaust channel seat 51 is connected to a limiting track 60, and a long toothed rod 61 is horizontally movably arranged in the limiting track 60, and the limiting track 60 plays a role of limiting guide, such as Fig.12 and 13 shown.

[0065] The right end of the long tooth rod 61 is connected to a cylinder rod 62, and the cylinder rod 62 extends horizontally outward from the inside of a telescopic cylinder 63, and the telescopic cylinder 63 is installed on the upper end surface of the pre-oxidation furnace 1, such as Fig.12 and 13 shown.

[0066] Among them, rotating gears 64 are equidistantly meshed on the long tooth rod 61, and several groups of rotating gears 64 are located in the exhaust gas channel seat 51. A rotating roller 65 is arranged above each group of rotating gears 64. Roller shafts 66 are welded to the upper and lower ends of the rotating rollers 65. Each group of roller shafts 66 is fixed through a bearing seat 67 and the inner wall of the exhaust gas channel seat 51. The rotating gear 64 is sleeved on the roller shaft 66 at the lower position. A deceleration baffle 68 is riveted on the roller shaft 66. Several groups of deceleration baffles 68 are equidistantly arranged in the flow channel 52. The initial position of each group of deceleration baffles 68 can be different, which is convenient for mutual cooperation. Fig.13 shown.

[0067] Furthermore, a burner 80 is provided at the lower end of the carbonization furnace 2, and the burner 80 heats the high-temperature carbonization chamber of the carbonization furnace 2, and the heating temperature is between 1200-1600°C. Figure 2 shown.

[0068] Furthermore, a surface treatment mechanism is arranged on the horizontal right side of the carbonization furnace 2. After carbonization, the multiple groups of polyacrylonitrile filament bundles 4 enter the surface treatment mechanism. A winding roller is arranged on the right side of the surface treatment mechanism, and the winding roller provides the power for winding.

[0069] When the present embodiment is in use, with the cooperation of the unwinding roller 3 and the winding roller on the left and the right, several groups of polyacrylonitrile bundles 4 start to move linearly to the right, first enter the inner drum seat 11, start the uniform speed motor 15, drive the small gear 14 to rotate, and slow down the rotation of the large gear 13 through meshing, so that the inner drum seat 11 rotates inside the outer drum seat 10, first open the ion air duct 17, generate ion wind and discharge it from several groups of ion wind holes 87, blow it on the surface of several groups of polyacrylonitrile bundles 4, eliminate the static charge on the polyacrylonitrile bundles 4, and the ion air duct 17 makes a circular motion, which can evenly eliminate static electricity, then the atomizer 18 starts to work, and after atomization oscillation, the atomized liquid is discharged from the atomization hole 19, and the atomized liquid adheres to the polyacrylonitrile bundles 4, which can reduce the dryness of the bundles and reduce the friction of the fibers between the bundles. The atomizer 18 makes a circular motion, which can evenly humidify several groups of polyacrylonitrile bundles 4.

[0070] When several groups of polyacrylonitrile bundles 4 after humidification are sent into the oxidation chamber 20, the constant temperature hot air blower 21 is started to produce hot air at 200-300°C. The hot air enters the hot air cross pipe 24 through two groups of first hot air connecting pipes 23, and is blown into the oxidation chamber 20 from several groups of hot air holes 25. At the same time, the hot air enters the horizontal branch main pipe 27 through several groups of second hot air connecting pipes 26, and is blown upward into the oxidation chamber 20 from the air outlet short pipe 28. The hot air evenly oxidizes the several groups of polyacrylonitrile bundles 4.

[0071] Since the fibers of the polyacrylonitrile bundle 4 will automatically shrink after being heated, the pressure wheel 298 on the anti-shrinkage structure 29 is used to contact the lower end surface of the polyacrylonitrile bundle 4, and the tension spring 295 acts on the sliding sleeve 292, the bracket 296 and the pressure wheel 298 in sequence to generate an upward lifting force on the polyacrylonitrile bundle 4, so that the polyacrylonitrile bundle 4 expands, thereby offsetting the shrinkage of the polyacrylonitrile bundle 4. At the same time, the short air outlet pipes 28 are evenly distributed on both sides of the anti-shrinkage structure 29, and the straight wind blown upward directly acts on the lower end surface of the polyacrylonitrile bundle 4, assisting the expansion of the linear polyacrylonitrile bundle 4.

[0072] Then, after a long period of oxidation, several groups of polyacrylonitrile bundles 4 enter the high-temperature carbonization chamber of the carbonization furnace 2 from the inlet 5, and the inert gas tank 32 supplies gas. Sufficient inert gas is added into the high-temperature carbonization chamber through the gas adding pipe 33 to create an oxygen-free carbonization environment, and then the furnace wall of the carbonization furnace 2 is heated by the burner 80 to fully heat the several groups of polyacrylonitrile bundles 4 inside to enable them to be continuously carbonized.

[0073] Start the suction device 34, keep the control valve 81 on the small suction pipe 35 open, periodically open the control valve 81 on the large suction pipe 37 (the two will not be synchronized), use the No. 1 suction hood 36 to suck the hot air in the oxidation chamber 20, use the No. 2 suction hood 38 to suck the high-temperature inert gas in the high-temperature carbonization chamber (the above two are collectively referred to as high-temperature gas), start the booster pump 47, generate suction force to press the high-temperature gas sucked up from the suction device 34 into the intake pipe 46, and flow into the spiral preheating coil 45 along the intake pipe 46 The high-temperature gas flows in the spiral pipeline of the spiral preheating coil 45 for a long time, and is fully in contact with the compressed air in the air storage chamber, transferring its own heat to the compressed air, and causing the high-temperature gas itself to cool down quickly, and the compressed air becomes preheated air. By opening the one-way valves 82 on the two sets of air ducts 44, the preheated air enters the air duct 44 and is continuously injected into the constant temperature hot air blower 21 through the air duct 44. The constant temperature hot air blower 21 is used to heat the preheated air for a second time to produce hot air to supply the oxidation chamber 20.

[0074] The cooling gas in the spiral preheating coil 45 flows downward, and is finally injected into the flow channel 52 of the exhaust gas processor 50 from the two groups of outlet pipes 48, and flows from right to left in the flow channel 52. The pressurized water pump in the absorption liquid tank 54 is turned on to inject the alkaline absorption liquid into the main liquid supply pipe 55, and then flows into a plurality of groups of branch pipes 56, and is sprayed out through the spray head 57 to form an atomized state, which is fully in contact with the cooling gas moving in the flow channel 52 to neutralize the acidic gas in the gas. At the same time, the telescopic cylinder 63 is turned on to allow the cylinder rod 62 to telescope, driving the long tooth rod 61 to move straight in the limit track 60. During the reverse motion, the long tooth rod 61 meshes with several groups of rotating gears 64 during the motion, causing the rotating gears 64 to rotate, thereby causing the rotating roller 65 to drive the deceleration baffle 68 to swing. During the swinging process, each group of deceleration baffles 68 frequently collides with the gas in the flow channel 52, thereby achieving a deceleration effect, extending the flow time of the cooling gas in the flow channel 52, thereby improving the absorption efficiency of the exhaust gas, and the clean gas is discharged outward from the exhaust short pipe 53. The waste liquid generated by the neutralization reaction in the flow channel 52 flows downward from several groups of waste liquid holes 58, enters the dark flow channel, and is then discharged outward through the waste liquid discharge pipe 83. Embodiment 2

[0075] On the basis of Example 1, since the inlet 5 and outlet 6 of the carbonization furnace 2 connect the environment outside the furnace with the environment inside the furnace, oxygen can easily enter the carbonization furnace 2 with the movement of the polyacrylonitrile tow 4, causing the carbon element in the polyacrylonitrile fiber to be oxidized and detached by oxygen, thereby causing the fiber to lose part of the carbon element, reducing the structural strength and thermal stability of the fiber. In order to solve the above problems, we have installed several groups of oxygen-blocking structures 9 acting on the polyacrylonitrile tow 4 at equal distances at the positions of the inlet 5 and the outlet 6, and the oxygen-blocking structures 9 at the two positions are symmetrically arranged, such as Fig.14 and 15 shown.

[0076] Specifically, two groups of capillary tubes 70 extending outward are symmetrically connected at the left and right gas outlets of the inert gas tank 32, and the lower end of each group of capillary tubes 70 is connected to a diversion cross pipe 71, which is horizontally installed on the carbonization furnace 2. Fig.14 shown.

[0077] Among them, the lower end of the diversion cross pipe 71 is equidistantly connected with a plurality of groups of pressurized pipes 72, each group of pressurized pipes 72 is respectively connected downward to the oxygen barrier structure 9, and each group of pressurized pipes 72 is installed with an electromagnetic pulse valve 73, such as Fig.14 and 15 shown.

[0078] Specifically, the oxygen barrier structure 9 includes a sealing shell 91, a pressurizing port 92, a wheel frame 93, a guide wheel 94, a ventilation gap 95, an upper gap 96 and a lower gap 97. Fig.15 shown.

[0079] In this embodiment, the sealing shell 91 is sealingly installed at the inlet 5 and the outlet 6 positions. A pressurizing port 92 is opened in the middle position of the upper end surface of the sealing shell 91. The pressurizing port 92 is sealed and connected to the lower end of the pressurizing tube 72. Two groups of wheel frames 93 are obliquely symmetrically screwed inside the sealing shell 91. Each group of wheel frames 93 is installed with a guide wheel 94 acting on the polyacrylonitrile bundle 4. The guide wheel 94 plays a guiding role to facilitate the movement of the polyacrylonitrile bundle 4.

[0080] In this embodiment, a ventilation gap 95 for the movement of the polyacrylonitrile filament bundle 4 is opened in the middle of the sealing shell 91. The ventilation gap 95 has a narrow structure. The ventilation gap 95 and the pressurizing port 92 are connected and connected. An upper gap 96 for the movement of the polyacrylonitrile filament bundle 4 is opened at the upper left side of the sealing shell 91, and a lower gap 97 for the movement of the polyacrylonitrile filament bundle 4 is opened at the lower right side of the sealing shell 91. The upper gap 96 and the lower gap 97 are both connected to the ventilation gap 95. The upper gap 96 and the lower gap 97 are slightly larger than the size of the polyacrylonitrile filament bundle 4 to avoid contact with the polyacrylonitrile filament bundle 4.

[0081] Furthermore, the oxygen barrier structures 9 on the inlet 5 and the outlet 6 have upper gaps 96 connected to the high-temperature carbonization chamber of the carbonization furnace 2 , and lower gaps 97 connected to the outside air.

[0082] When the present embodiment is in use, the electromagnetic pulse valve 73 on each group of pressurizing tubes 72 is intermittently opened, allowing a small amount of inert gas in the inert gas tank 32 to enter the capillary 70, the diversion cross tube 71 and the pressurizing tube 72 in turn, and be instantly injected into the narrow ventilation gap 95 from the pressurizing port 92, so that the pressure in the ventilation gap 95 instantly increases, squeezing the air in the oxygen-blocking structure 9, causing it to be discharged from the lower gap 97 and enter the outside, and then the ventilation gap 95 is filled with inert gas, which is then slowly discharged to the outside to achieve the purpose of releasing pressure, and the cycle is repeated (there is always a difference in strength between the inside and outside of the lower gap 97) to ensure that no air enters the oxygen-blocking structure 9 from the outside.

[0083] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special production equipment for carbon fiber spinning composite material, comprising a pre-oxidation furnace (1) and a carbonization furnace (2), characterized in that: The pre-oxidation furnace (1) is located on the horizontal left side of the carbonization furnace (2). A discharge roller (3) is installed on the horizontal left side of the pre-oxidation furnace (1). The multiple groups of polyacrylonitrile tows (4) on the discharge roller (3) pass through the inner drum seat (11) and enter the oxidation chamber (20) of the pre-oxidation furnace (1). The middle positions of the left and right end surfaces of the carbonization furnace (2) are respectively provided with an inlet (5) and an outlet (6). The multiple groups of polyacrylonitrile tows (4) pass through the oxidation chamber (20), the inlet (5) and the high-temperature carbonization chamber of the carbonization furnace (2) in sequence and are discharged outward from the outlet (6); A constant temperature hot air blower (21) is installed at the bottom of the pre-oxidation furnace (1) and below the oxidation chamber (20); a porous joint (22) is installed at the middle position of the upper end surface of the constant temperature hot air blower (21); two groups of first hot air connecting pipes (23) are symmetrically connected to the porous joint (22) in the front-to-back direction; the upper end of each group of the first hot air connecting pipes (23) is connected to a hot air transverse pipe (24); the hot air transverse pipe (24) is installed on the inner wall of the oxidation chamber (20); a plurality of groups of hot air holes (25) are evenly opened on the inner side surface of the hot air transverse pipe (24); the two groups of the hot air transverse pipes (24) are symmetrically distributed on both sides of the plurality of groups of polyacrylonitrile bundles (4); A plurality of groups of second hot air connecting pipes (26) are symmetrically connected to the porous joint (22) in the left-right direction, the upper end of each group of the second hot air connecting pipes (26) is connected to a horizontal flow dividing main pipe (27), and a plurality of groups of short air outlet pipes (28) are equidistantly installed at the upper end of each group of the horizontal flow dividing main pipes (27), the short air outlet pipes (28) extending upward into the oxidation chamber (20), each group of the polyacrylonitrile bundles (4) are respectively located directly above the short air outlet pipes (28), a positioning seat (86) is fixedly installed at the middle position of the bottom of the oxidation chamber (20), and anti-shrinkage structures (29) acting on the polyacrylonitrile bundles (4) are equidistantly installed on the positioning seat (86); A long connecting seat (30) is provided between the top of the pre-oxidation furnace (1) and the carbonization furnace (2); an air suction device (34) is installed at the middle position of the long connecting seat (30); a small air suction pipe (35) is installed on one group of interfaces in the air suction device (34); the small air suction pipe (35) extends downward into the oxidation chamber (20); the lower end of the small air suction pipe (35) is connected to a first air suction hood (36); a large air suction pipe (37) is installed on another group of interfaces in the air suction device (34); the large air suction pipe (35) extends downward into the oxidation chamber (20); the lower end of the small air suction pipe (35) is connected to a first air suction hood (36); a large air suction pipe (37) is installed on the other ... small air suction pipe (35) extends downward into the oxidation chamber (20); the lower end of the small air suction pipe (35) is connected to a first air suction hood (36); the large air suction pipe (37) is installed on the other group of interfaces in the air suction device (34); the large air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber (20); the small air suction pipe (35) extends downward into the oxidation chamber ( (37) extends downward into the high-temperature carbonization chamber of the carbonization furnace (2), the lower end of the large suction pipe (37) is connected to a No. 2 suction hood (38), the upper end surface of the long connecting seat (30) and located on the right side of the suction device (34) is equipped with a support seat (31), an inert gas tank (32) is placed on the support seat (31), and the gas outlet of the inert gas tank (32) is connected to a gas filling pipe (33), and the gas filling pipe (33) passes through the long connecting seat (30) and downward into the high-temperature carbonization chamber of the carbonization furnace (2).

2. The special production equipment for carbon fiber spinning composite material according to claim 1, characterized in that: An outer cylinder seat (10) is arranged outside the inner cylinder seat (11); the right end of the outer cylinder seat (10) is fixed on the left end face of the pre-oxidation furnace (1); the outer cylinder seat (10) and the inner cylinder seat (11) are connected via two sets of inner bearings (12); a large gear (13) is sleeved outside the inner cylinder seat (11) and located between the two sets of inner bearings (12); a small gear (14) is meshedly arranged on one side of the large gear (13); the small gear (14) is sleeved on the output shaft of a uniform speed motor (15); and the uniform speed motor (15) is horizontally mounted on the left end face of the pre-oxidation furnace (1).

3. The special production equipment for carbon fiber spinning composite material according to claim 2, characterized in that: A cavity (16) is provided inside the inner drum seat (11), and an ion air duct (17) and an atomizer (18) are respectively installed on the cavity wall of the cavity (16). A plurality of groups of ion air holes (87) acting on the polyacrylonitrile filament bundle (4) are evenly provided on the tube surface of the ion air duct (17), and a plurality of groups of atomization holes (19) acting on the polyacrylonitrile filament bundle (4) are evenly provided on the end surface of the atomizer (18), and a water filling cover (85) is provided on the end of the atomizer (18) away from the atomization hole (19) extending out of the inner drum seat (11).

4. The special production equipment for carbon fiber spinning composite material according to claim 1, characterized in that: The anti-shrinkage structure (29) comprises a fixed column (291), a sliding sleeve (292), an L-shaped slider (293), a sliding groove (294), a tension spring (295), a bracket (296), a tensioning groove (297) and a pressure wheel (298); the fixed column (291) is vertically welded to the positioning seat (86); the upper end of the fixed column (291) is sleeved with the sliding sleeve (292); the lower end surface of the sliding sleeve (292) is uniformly welded with a plurality of groups of L-shaped sliders (293); the outer surface of the fixed column (291) is provided with respective L-shaped sliders (293) for the L-shaped sliders (293) to be inserted into the fixed column (291); A slide groove (294) is provided for moving up and down on the support (293), a tension spring (295) is fixedly connected between the positioning seat (86) and the plurality of groups of L-shaped slide blocks (293) and is sleeved on the outside of the fixed column (291), the upper end of the sliding sleeve (292) is vertically connected to a bracket (296), the top of the bracket (296) is provided with a tensioning groove (297) for accommodating the polyacrylonitrile bundle (4), a pressure wheel (298) in contact with the polyacrylonitrile bundle (4) is installed inside the bracket (296), and a part of the pressure wheel (298) extends out of the tensioning groove (297).

5. The special production equipment for carbon fiber spinning composite material according to claim 1, characterized in that: A pre-annular air seat (40) is installed on the upper end surface of the long connecting seat (30) and located on the left side of the air intake device (34). The pre-annular air seat (40) comprises an outer sealing shell seat (41), a top cover (42), an air compressor (43), an air guide pipe (44) and a spiral preheating coil (45). The inner layer of the outer sealing shell seat (41) is filled with a heat-insulating material. The top cover (42) is fixed to the upper end of the outer sealing shell seat (41). The middle position of the top cover (42) is installed with An air compressor (43), a spiral preheating coil (45) is arranged around the inner side of the outer sealing housing (41) and below the top cover (42), the inner side of the spiral preheating coil (45) is surrounded by an air storage chamber, and two groups of air guide pipes (44) are symmetrically connected to the bottom of the air storage chamber, each group of the air guide pipes (44) extends downward and is connected to the constant temperature hot air blower (21), and the air guide pipes (44) guide the hot air in the air storage chamber into the constant temperature hot air blower (21).

6. The special production equipment for carbon fiber spinning composite material according to claim 5, characterized in that: The upper end of the spiral preheating coil (45) is connected to an air inlet pipe (46), which extends horizontally to the right and enters the interior of the air suction device (34). A booster pump (47) is installed on the air inlet pipe (46). The lower end of the spiral preheating coil (45) is divided into two joints, each group of joints is connected to an air outlet pipe (48), and the two groups of the air outlet pipes (48) are symmetrical parts. The air outlet pipes (48) extend outward and are connected to the exhaust gas processor (50). The exhaust gas processors (50) are symmetrically fixed at the edge of the upper end surface of the pre-oxidation furnace (1) in two groups.

7. The special production equipment for carbon fiber spinning composite material according to claim 6, characterized in that: The exhaust gas processor (50) comprises an exhaust gas channel seat (51), a flow channel (52) is horizontally opened inside the exhaust gas channel seat (51), a plurality of waste liquid holes (58) are opened at the middle position of the bottom of the flow channel (52), the left end of the flow channel (52) extends outwardly to be connected to an exhaust short pipe (53), and the right end of the flow channel (52) is extended into the supply outlet pipe (48), an absorption liquid tank (54) is fixedly installed on the upper end surface of the pre-oxidation furnace (1) and located on the left side of the long connecting seat (30), a main liquid supply pipe (55) is installed at the bottom of the absorption liquid tank (54), the main liquid supply pipe (55) extends into the interior of the long connecting seat (30), and a plurality of groups of branch pipes (56) are equidistantly installed on the front and rear sides of the main liquid supply pipe (55), each group of the branch pipes (56) extends horizontally into the flow channel (52), and a spray head (57) acting on the exhaust gas is installed at the end of the branch pipe (56).

8. The special production equipment for carbon fiber spinning composite material according to claim 7, characterized in that: A limiting track (60) is connected to a lower side of the exhaust gas channel seat (51); a long toothed rod (61) is horizontally movably arranged in the limiting track (60); a cylinder rod (62) is connected to the right end of the long toothed rod (61); the cylinder rod (62) extends horizontally outward from the inside of a telescopic cylinder (63); the telescopic cylinder (63) is mounted on the upper end surface of the pre-oxidation furnace (1); rotating gears (64) are equidistantly meshed on the long toothed rod (61); a plurality of groups of rotating gears (64) are evenly spaced. In the exhaust gas channel seat (51), a rotating roller (65) is arranged above each group of the rotating gears (64), and roller shafts (66) are welded to the upper and lower ends of the rotating rollers (65). Each group of the roller shafts (66) is fixed by a bearing seat (67) and the inner wall of the exhaust gas channel seat (51). The rotating gears (64) are sleeved on the roller shafts (66) at the lower position, and a deceleration baffle (68) is riveted on the roller shafts (66). A plurality of groups of the deceleration baffles (68) are equidistantly arranged in the flow channel (52).

9. The dedicated production equipment for carbon fiber spinning composite materials according to claim 1, characterized in that: A plurality of oxygen-blocking structures (9) acting on the polyacrylonitrile filament bundle (4) are equidistantly installed at the positions of the inlet (5) and the outlet (6); two groups of capillary tubes (70) extending outward are symmetrically connected at the left and right gas outlets of the inert gas tank (32); the lower end of each group of the capillary tubes (70) is connected to a diversion cross pipe (71); the diversion cross pipe (71) is horizontally installed on the carbonization furnace (2); the lower end of the diversion cross pipe (71) is equidistantly connected to a plurality of pressurizing tubes (72); each group of the pressurizing tubes (72) is respectively connected downward to the oxygen-blocking structure (9); and each group of the pressurizing tubes (72) is installed with an electromagnetic pulse valve (73).

10. The special production equipment for carbon fiber spinning composite material according to claim 9, characterized in that: The oxygen barrier structure (9) comprises a sealing shell (91), a pressurizing port (92), a wheel frame (93), a guide wheel (94), a ventilation gap (95), an upper gap (96) and a lower gap (97); the sealing shell (91) is sealed and installed at the inlet (5) and the outlet (6); a pressurizing port (92) is provided at the middle position of the upper end surface of the sealing shell (91); the pressurizing port (92) and the lower end of the pressurizing pipe (72) are sealed and connected; two groups of wheel frames (93) are obliquely symmetrically screwed inside the sealing shell (91); each group of wheel frames (93) is installed with A guide wheel (94) acts on the polyacrylonitrile bundle (4); a ventilation gap (95) is provided in the middle of the sealing shell (91) for the polyacrylonitrile bundle (4) to move; the ventilation gap (95) is connected to the pressurizing port (92); an upper gap (96) is provided at the upper left side of the sealing shell (91) for the polyacrylonitrile bundle (4) to move; a lower gap (97) is provided at the lower right side of the sealing shell (91) for the polyacrylonitrile bundle (4) to move; the upper gap (96) and the lower gap (97) are both connected to the ventilation gap (95).

Images