Gum dipping device and thin-walled tube production system and method using same

Abstract

The invention relates to the technical field of composite materials, in particular to a gum dipping device and a thin-walled pipe production system and method.The annular pressure gum dipping device comprises a horizontally-arranged gum dipping box body, and gum dipping pipelines are horizontally arranged on the front end face and the rear end face of the gum dipping box body in a penetrating mode; the gum dipping pipeline comprises a yarn inlet, an expanding section, a shrinking section and a yarn outlet which are communicated in sequence; a plurality of glue inlets are formed in the side walls of the expanding section and the shrinking section at intervals; each glue inlet is communicated with the outer surface of the glue dipping box body; the side wall of the yarn outlet is further provided with an annular glue overflowing preventing groove, and a backflow opening is formed in the bottom of the glue overflowing preventing groove. A pressure sensor is further mounted on the inner wall of the impregnation pipeline and electrically connected with a glue injection controller, and the glue injection controller is electrically connected with a glue injection pump; according to the invention, three composite material production processes of pultrusion, winding and weaving are combined, so that the overall mechanical properties, especially the circumferential performance and the anti-fatigue performance, of the tubular profile are improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a glue dipping device, and a thin-walled tube production system and method using the device. Background Art

[0002] The current UAV industry is developing rapidly and is widely used in many fields such as material transportation, aerial photography, agriculture, disaster relief, surveying and mapping. With the expansion of application directions, higher requirements are also placed on the performance of the materials used in the UAVs themselves; the rotor system is an important component of the UAV's flight lift, and the materials used are required to have the characteristics of light weight, high strength, large damage tolerance, good fatigue resistance and high circumferential strength.

[0003] The manufacturing processes of traditional carbon fiber tubes are mostly pultrusion, winding, roll forming, and a composite process of pultrusion-winding and pultrusion weaving; among them, pultruded products have high longitudinal mechanical properties and poor lateral properties, and can produce products with longer lengths; fiber-wound products have high specific strength and stable quality, but it is more difficult to wind the product purely longitudinally, and the product length is limited; the most prominent feature of the pipe fittings produced by the pultrusion-weaving-winding process is that the pipe fittings have high axial stiffness, strong pressure bearing capacity, good fatigue resistance, good inner and outer surface quality, high dimensional accuracy, and are designable in performance, which can meet the performance requirements under various complex working conditions.

[0004] Therefore, in view of the above problems, the present invention urgently needs to provide a dipping device, a thin-walled tube production system and method using the device. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a dipping device, a thin-walled tube production system and method using the device. The present invention combines three composite material production processes of pultrusion, winding and weaving, thereby greatly improving the overall mechanical properties of the tubular profile, especially the circumferential performance and fatigue resistance.

[0006] The present invention provides an annular pressure dipping device, comprising a dipping box placed horizontally, with dipping pipes being horizontally provided on the front and rear end surfaces of the dipping box, and the dipping pipes comprising a yarn inlet, an enlarged section, a reduced section and a yarn outlet which are connected in sequence;

[0007] The side walls of the expansion section and the reduction section are provided with a plurality of glue inlets at intervals, and each glue inlet is connected to the outer surface of the glue dipping box; the side wall of the yarn outlet is also provided with an annular anti-overflow glue groove, and a reflux port is provided at the bottom of the anti-overflow glue groove;

[0008] A pressure sensor is also installed on the inner wall of the glue dipping pipeline; it also includes a glue injection pipeline and a glue storage tank for injecting glue liquid, the glue storage tank is connected with each glue inlet through the glue injection pipeline, the glue injection pipeline is provided with a glue injection pump, and also includes a glue injection controller; the pressure sensor is electrically connected to the glue injection controller, and the glue injection controller is electrically connected to the glue injection pump; the reflux port and the glue storage tank are also connected through the reflux pipeline.

[0009] Preferably, the angle between the side wall of the enlarged section and the horizontal plane is 5°-10°, and the angle between the side wall of the reduced section and the horizontal plane is 170°-175°.

[0010] Preferably, the diameter of the yarn inlet is 50.1 mm, and the diameter of the yarn outlet is 50.5 mm.

[0011] Preferably, the diameter of each glue inlet is 10 mm, and the diameter of the return port is 15 mm.

[0012] The present invention also provides a pultrusion-winding-weaving combined carbon fiber thin-wall tube production system, comprising a common dipping device, a yarn separation plate, a winding device, a weaving device, an annular pressure dipping device, a curing device and a traction device arranged in sequence; and also comprising a core rod installed between the yarn separation plate and the traction device;

[0013] Wherein, the common dipping device is used for performing the initial dipping treatment on the first continuous fiber;

[0014] A yarn splitting plate is used to gather the first continuous fibers after the initial dipping treatment into the shape of a thin-walled tube;

[0015] A winding device, used for winding the second continuous fiber around the outside of the first continuous fiber after being bundled;

[0016] A weaving device, used for weaving the third continuous fibers into a tube and covering the third continuous fibers on the outside;

[0017] The annular pressure dipping device is used for performing secondary dipping treatment on the first continuous fibers, the second continuous fibers and the third continuous fibers after being bundled, wound and woven;

[0018] A curing device, used for heating and curing the first continuous fibers, the second continuous fibers and the third continuous fibers after the secondary dipping treatment;

[0019] A traction device, used for traction of the first continuous fiber to sequentially pass through a common dipping device, a yarn separation plate, a winding device, a braiding device, a ring pressure dipping device and a curing device;

[0020] The diameter of the yarn outlet is 1.01 times the outer diameter of the thin-wall tube; and the dipping pressure of the annular pressure dipping device is 2-10 MPa.

[0021] Preferably, the yarn delivery speed w of the winding device satisfies the following formula: w=2πrv / a, wherein w is the yarn delivery speed of the winding device, in m / s; r is the winding radius of the second continuous fiber, in m; v is the speed at which the traction device pulls the first continuous fiber, in m / s; a is the width of the yarn sheet, in m; the winding angle of the winding device satisfies the following formula: α=arctan(2πr / a), wherein α is the winding angle of the winding device, that is, the angle between the yarn and the horizontal plane, in °; r is the winding radius of the second continuous fiber, in m; a is the width of the yarn sheet, in m.

[0022] Preferably, the glue liquid in the common dipping device and the annular pressure dipping device is made of resin glue liquid.

[0023] The present invention also provides a method for producing a carbon fiber thin-wall tube by combining pultrusion, winding and braiding, comprising the following steps:

[0024] 1) Prepare a carbon fiber thin-wall tube production system combining pultrusion, winding and braiding;

[0025] 2) After the first continuous fiber passes through a common dipping device, a yarn separation plate is used to gather the first continuous fiber after the initial dipping treatment into the shape of a thin-walled tube to obtain a first fiber layer;

[0026] 3) connecting the end of the first continuous fiber to a traction device, and using the traction device to pull the first continuous fiber through a common dipping device, a yarn separation plate, a winding device, a braiding device, a ring pressure dipping device and a curing device in sequence;

[0027] 4) using a winding device to wind the second continuous fiber around the outside of the first fiber layer after the bundle is formed, to obtain a second fiber layer;

[0028] 5) using a weaving device to weave the third continuous fiber into a tube and wrap it around the outer side of the wound second fiber layer;

[0029] 6) using an annular pressure dipping device to perform secondary dipping treatment on the first continuous fiber, the second continuous fiber and the third continuous fiber that have been bundled, wound and woven;

[0030] 7) using a curing device to heat and cure the first continuous fibers, the second continuous fibers, and the third continuous fibers after the secondary dipping treatment;

[0031] Among them, the dipping pressure of the annular pressure dipping device is 2-10MPa.

[0032] Preferably, the first continuous fibers, the second continuous fibers and the third continuous fibers are all made of carbon fibers, and the glue in the common dipping device and the annular pressure dipping device are both made of resin glue.

[0033] Preferably, the thickness of the first fiber layer is 0.2 mm, the thickness of the second fiber layer is 0.4 mm, and the thickness of the third fiber layer is 1.4 mm; the outer diameter of the thin-walled tube is 50 mm, and the thickness is 2 mm.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention provides an annular pressure dipping device, which provides a dipping pipe with a diameter that gradually expands and then gradually decreases from a yarn inlet to a yarn outlet, and at the same time injects glue into the dipping pipe through a plurality of glue inlets arranged at intervals, squeezes out the air in the fiber by pressure dipping and injects glue into the fiber, thereby improving the degree of glue infiltration of the fiber; at the same time, an annular anti-overflow glue groove is provided, and a reflux port is provided at the bottom of the anti-overflow glue groove, so that the overflowed glue is returned to the dipping pipe, thereby improving the utilization rate of the glue; and a pressure sensor is installed inside the dipping pipe to sense the pressure inside the dipping pipe, thereby obtaining the dipping effect of the fiber, and the pressure sensor is connected to the glue injection controller to control the amount of glue injected into the dipping pipe, thereby ensuring the dipping effect of the fiber in the dipping device, and improving the problem of poor wettability caused by the existing glue injection process;

[0036] 2. The present invention provides a carbon fiber thin-wall tube production system and method that combines pultrusion-winding-weaving using an annular pressure dipping device, which combines the three composite material production processes of pultrusion, winding and weaving, thereby greatly improving the overall mechanical properties of the tubular profile, especially the annular performance and fatigue resistance. The present invention effectively combines the advantages of the three processes of pultrusion, winding and weaving, and uses carbon fiber for production. Compared with glass fiber products, the performance is greatly improved, the production efficiency is greatly improved, and the cost is reduced. The present invention uses a secondary dipping process, and the fiber is secondary dipped by an annular pressure dipping device, which improves the problem of poor wettability caused by the injection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is a schematic structural diagram (cross-sectional view) of an annular pressure dipping device according to an embodiment of the present invention;

[0038] Figure 2 It is a structural schematic diagram (stereoscopic diagram) of a carbon fiber thin-wall tube production system combined with pultrusion-winding-braiding according to an embodiment of the present invention;

[0039] Figure 3 It is a production flow chart of the method for producing a carbon fiber thin-wall tube by combining pultrusion-winding-braiding according to an embodiment of the present invention;

[0040] Figure 4 It is a control flow chart of the annular pressure dipping device described in an embodiment of the present invention.

[0041] Among them: 1. Ordinary dipping device; 2. Yarn dividing plate; 3. Winding device; 4. Weaving device; 5. Annular pressure dipping device; 501. Dipping box; 502. Dipping pipeline; 503. Yarn inlet; 504. Yarn outlet; 505. Glue inlet; 506. Anti-overflow glue groove; 507. Backflow port; 6. Curing device; 7. Traction device; 8. Mandrel. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution 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.

[0043] like Figure 1 , Figure 4 As shown, the present invention provides an annular pressure dipping device, comprising a horizontally placed dipping box 501, the front and rear end surfaces of the dipping box 501 are horizontally penetrated with a dipping pipe 502, and the dipping pipe 502 comprises a yarn inlet 503, an enlarged section, a reduced section and a yarn outlet 504 which are connected in sequence;

[0044] The side walls of the expansion section and the reduction section are provided with a plurality of glue inlets 505, each of which is connected to the outer surface of the dipping box 501; the side wall of the yarn outlet 504 is also provided with an annular anti-overflow glue groove 506, and the bottom of the anti-overflow glue groove 506 is provided with a reflux port 507;

[0045] A pressure sensor is also installed on the inner wall of the glue dipping pipe 502; it also includes a glue injection pipeline and a glue storage tank for injecting glue liquid, the glue storage tank is connected with each glue inlet 505 through the glue injection pipeline, the glue injection pipeline is provided with a glue injection pump, and also includes a glue injection controller; the pressure sensor is electrically connected to the glue injection controller, and the glue injection controller is electrically connected to the glue injection pump; the reflux port 507 is also connected to the glue storage tank through the reflux pipeline.

[0046] The present invention provides an annular pressure dipping device, which is provided with a dipping pipe 502 whose diameter gradually expands and then gradually decreases from a yarn inlet 503 to a yarn outlet 504, and at the same time, glue is injected into the dipping pipe 502 through a plurality of glue inlets 505 arranged at intervals, and the air in the fiber is squeezed out by pressure dipping and glue is injected into the fiber, thereby improving the degree of glue infiltration of the fiber; at the same time, an annular anti-overflow glue groove 506 is provided, and a reflux port 507 is provided at the bottom of the anti-overflow glue groove 506, so that the overflowed glue is returned to the dipping pipe 502, thereby improving the utilization rate of the glue; and a pressure sensor is installed inside the dipping pipe 502 for sensing the pressure inside the dipping pipe 502, thereby obtaining the dipping effect of the fiber, and the pressure sensor is connected to the glue injection controller to control the amount of glue injected into the dipping pipe 502, thereby ensuring the dipping effect of the fiber in the dipping device, and improving the problem of poor wettability caused by the existing glue injection process.

[0047] In this embodiment, the angle between the side wall of the enlarged section and the horizontal plane is 5°-10°, and the angle between the side wall of the reduced section and the horizontal plane is 170°-175°.

[0048] In this embodiment, the diameter of the yarn inlet 503 is 50.1 mm, and the diameter of the yarn outlet 504 is 50.5 mm.

[0049] In this embodiment, the diameter of each glue inlet 505 is 10 mm, and the diameter of the return port 507 is 15 mm.

[0050] like Figure 2 As shown, the present invention provides a pultrusion-winding-weaving combined carbon fiber thin-wall tube production system, comprising a common dipping device 1, a yarn separation plate 2, a winding device 3, a weaving device 4, an annular pressure dipping device 5, a curing device 6 and a traction device 7 arranged in sequence; and also comprising a mandrel 8 installed between the yarn separation plate 2 and the traction device 7;

[0051] Wherein, the common dipping device 1 is used for performing the initial dipping treatment on the first continuous fiber;

[0052] The yarn separation plate 2 is used to gather the first continuous fibers after the initial dipping treatment into the shape of a thin-walled tube;

[0053] A winding device 3, used for winding the second continuous fiber to the outside of the first continuous fiber after being bundled;

[0054] A weaving device 4, used for weaving the third continuous fibers into a tube and covering the third continuous fibers on the outside;

[0055] The annular pressure dipping device 5 is used for performing a secondary dipping treatment on the first continuous fibers, the second continuous fibers and the third continuous fibers after being bundled, wound and woven;

[0056] A curing device 6, used for heating and curing the first continuous fibers, the second continuous fibers and the third continuous fibers after the secondary dipping treatment;

[0057] A traction device 7, used for traction of the first continuous fiber to sequentially pass through the common dipping device 1, the yarn separation plate 2, the winding device 3, the braiding device 4, the annular pressure dipping device 5 and the curing device 6;

[0058] The diameter of the yarn outlet 504 is 1.01 times the outer diameter of the thin-walled tube; and the dipping pressure of the annular pressure dipping device is 2-10 MPa.

[0059] The present invention provides a carbon fiber thin-wall tube production system that combines pultrusion-winding-weaving using an annular pressure dipping device, which combines the three composite material production processes of pultrusion, winding and weaving, thereby greatly improving the overall mechanical properties of the tubular profile, especially the annular performance and fatigue resistance. The present invention effectively combines the advantages of the three processes of pultrusion, winding and weaving, and uses carbon fiber for production. Compared with glass fiber products, the performance is greatly improved, the production efficiency is greatly improved, and the cost is reduced. The present invention uses a secondary dipping process, and performs secondary dipping of the fibers through an annular pressure dipping device, thereby improving the problem of poor wettability caused by the injection process.

[0060] In the present invention, the curing device 6 includes a curing template, and the front and rear end surfaces of the curing template are penetrated with a curing cavity, and the curing cavity includes a first heating section, a second heating section and a third heating section which are connected end to end in sequence, wherein the length of the first heating section is 300 mm and the temperature is 125°C; the length of the second heating section is 300 mm and the temperature is 145°C; the length of the third heating section is 300 mm and the temperature is 165°C.

[0061] In this embodiment, the yarn delivery speed w of the winding device 3 satisfies the following formula: w=2πrv / a, wherein w is the yarn delivery speed of the winding device 3, in m / s; r is the winding radius of the second continuous fiber, in m; v is the speed at which the traction device 7 pulls the first continuous fiber, in m / s; a is the yarn sheet width, in m; the winding angle of the winding device 3 satisfies the following formula: α=arctan(2πr / a), wherein α is the winding angle of the winding device 3, that is, the angle between the yarn and the horizontal plane, in °; r is the winding radius of the second continuous fiber, in m; a is the yarn sheet width, in m.

[0062] In this embodiment, the glue liquid in the common dipping device 1 and the annular pressure dipping device is made of resin glue liquid.

[0063] like Figure 3 As shown, the present invention provides a method for producing a carbon fiber thin-wall tube by pultrusion-winding-braiding, comprising the following steps:

[0064] 1) Prepare a carbon fiber thin-wall tube production system combining pultrusion, winding and braiding;

[0065] 2) After the first continuous fiber passes through the common dipping device 1, the first continuous fiber after the initial dipping treatment is bundled into the shape of a thin-walled tube using a yarn separation plate 2 to obtain a first fiber layer;

[0066] 3) connecting the end of the first continuous fiber to the traction device 7, and using the traction device 7 to pull the first continuous fiber through the common dipping device 1, the yarn separation plate 2, the winding device 3, the braiding device 4, the annular pressure dipping device 5 and the curing device 6 in sequence;

[0067] 4) using the winding device 3 to wind the second continuous fiber around the outside of the first fiber layer after the bundle is formed, to obtain a second fiber layer;

[0068] 5) using a weaving device 4 to weave the third continuous fiber into a tube and wrap it around the outer side of the wound second fiber layer;

[0069] 6) using the annular pressure dipping device 5 to perform secondary dipping treatment on the first continuous fibers, the second continuous fibers and the third continuous fibers that have been bundled, wound and woven;

[0070] 7) using a curing device 6 to heat and cure the first continuous fibers, the second continuous fibers, and the third continuous fibers after the secondary dipping treatment;

[0071] The dipping pressure of the annular pressure dipping device 5 is 2-10 MPa.

[0072] The present invention provides a method for producing a carbon fiber thin-wall tube by combining pultrusion-winding-weaving using an annular pressure dipping device, which combines the three composite material production processes of pultrusion, winding and weaving, thereby greatly improving the overall mechanical properties of the tubular profile, especially the annular performance and fatigue resistance. The present invention effectively combines the advantages of the three processes of pultrusion, winding and weaving, and uses carbon fiber for production. Compared with glass fiber products, the performance is greatly improved, the production efficiency is greatly improved, and the cost is reduced. The present invention uses a secondary dipping process, and the fiber is secondary dipped in glue by an annular pressure dipping device, thereby improving the problem of poor wettability caused by the injection process.

[0073] In this embodiment, the first continuous fibers, the second continuous fibers, and the third continuous fibers are all made of carbon fibers, and the glue in the common dipping device 1 and the annular pressure dipping device are both made of resin glue.

[0074] In this embodiment, the thickness of the first fiber layer is 0.2 mm, the thickness of the second fiber layer is 0.4 mm, and the thickness of the third fiber layer is 1.4 mm.

[0075] In this embodiment, the outer diameter of the thin-walled tube is 50 mm and the thickness is 2 mm.

[0076] The present invention also provides an embodiment, wherein a method for producing a carbon fiber thin-wall tube by pultrusion-winding-braiding combined with a carbon fiber tube having an outer diameter of 50 mm and a wall thickness of 2 mm comprises the following steps:

[0077] 1) Prepare a carbon fiber thin-wall tube production system combining pultrusion, winding and braiding;

[0078] 2) Using a domestic 24K carbon fiber plus epoxy resin system, after the first continuous fiber passes through a common dipping device 1, a yarn separation plate 2 is used to gather the first continuous fiber after the initial dipping treatment into the shape of a thin-walled tube to obtain a first fiber layer;

[0079] 3) connecting the end of the first continuous fiber to the traction device 7, and using the traction device 7 to pull the first continuous fiber through the common dipping device 1, the yarn separation plate 2, the winding device 3, the braiding device 4, the annular pressure dipping device 5 and the curing device 6 in sequence;

[0080] 4) using the winding device 3 to wind the second continuous fiber around the outside of the first fiber layer after the bundle is formed, so as to obtain a second fiber layer; wherein the second fiber layer is formed by winding two layers of the second continuous fiber in forward and reverse directions at a winding angle of 87°;

[0081] 5) using a weaving device 7 to weave the third continuous fiber into a tube and wrap it around the outer side of the wound second fiber layer; wherein the weaving angle of the third fiber layer is 90°, and the number of weaving spindles is 64;

[0082] 6) using an annular pressure dipping device 5 to perform secondary dipping treatment on the first continuous fiber, the second continuous fiber and the third continuous fiber after being bundled, wound and woven; wherein the injection pressure in the annular pressure dipping device 5 is set to 4.2 MPa, the length of the first heating section in the mold is 300 mm, and the temperature is 125° C.; the length of the second heating section is 300 mm, and the temperature is 145° C.; the length of the third heating section is 300 mm, and the temperature is 165° C.;

[0083] 7) using a curing device 6 to heat and cure the first continuous fibers, the second continuous fibers, and the third continuous fibers after the secondary dipping treatment;

[0084] After the above operation, the outer diameter of the carbon fiber tube produced was measured to be 49.8mm, and the wall thickness was measured at 4 points along the length direction of the carbon fiber tube. The measured wall thicknesses were 1.98mm, 2.01mm, 1.99mm and 2.01mm respectively, and the wall thickness was uniform. The bending performance of the obtained carbon fiber tube was measured, and the bending performance of the carbon fiber tube with a fiber content of 61% and a length of 850mm was measured to be 500MPa, which greatly improved the performance.

[0085] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An annular pressure dipping device, characterized in that: It comprises a horizontally placed glue dipping box (501), the front and rear end surfaces of the glue dipping box (501) are horizontally penetrated with glue dipping pipes (502), and the glue dipping pipes (502) comprise a yarn inlet (503), an enlarged section, a reduced section and a yarn outlet (504) which are connected in sequence; A plurality of glue inlets (505) are provided at intervals on the side walls of the expansion section and the reduction section, and each glue inlet (505) is connected to the outer surface of the glue dipping box (501); a circular glue overflow prevention groove (506) is provided on the side wall of the yarn outlet (504), and a return port (507) is provided at the bottom of the glue overflow prevention groove (506); The inner wall of the glue dipping pipeline (502) is also equipped with a pressure sensor; it also includes a glue injection pipeline and a glue storage tank for injecting glue liquid, the glue storage tank is connected with each glue inlet (505) through the glue injection pipeline, a glue injection pump is provided on the glue injection pipeline, and also includes a glue injection controller; the pressure sensor is electrically connected to the glue injection controller, and the glue injection controller is electrically connected to the glue injection pump; the reflux port (507) is also connected with the glue storage tank through the reflux pipeline.

2. The annular pressure dipping device according to claim 1, characterized in that: The included angle between the side wall of the enlarged section and the horizontal plane is 5°-10°, and the included angle between the side wall of the reduced section and the horizontal plane is 170°-175°.

3. The annular pressure dipping device according to claim 2 is characterized in that: The diameter of the yarn inlet (503) is 50.1 mm, and the diameter of the yarn outlet (504) is 50.5 mm.

4. The annular pressure dipping device according to claim 3 is characterized in that: The diameter of each glue inlet (505) is 10 mm, and the diameter of the return port (507) is 15 mm.

5. A carbon fiber thin-wall tube production system combining pultrusion, winding and braiding, characterized in that: The invention comprises a common dipping device (1), a yarn separation plate (2), a winding device (3), a braiding device (4), an annular pressure dipping device (5) as claimed in any one of claims 1 to 4, a curing device (6) and a traction device (7) which are arranged in sequence; and further comprises a core rod (8) installed between the yarn separation plate (2) and the traction device (7); The common dipping device (1) is used to perform a primary dipping treatment on the first continuous fiber; A yarn separation plate (2) is used to gather the first continuous fibers after the initial dipping treatment into the shape of a thin-walled tube; A winding device (3) is used to wind the second continuous fiber around the outside of the first continuous fiber after being bundled; A weaving device (4) is used to weave the third continuous fibers into a tube shape and wrap the tube around the second continuous fibers; An annular pressure dipping device (5) is used for performing a secondary dipping treatment on the first continuous fibers, the second continuous fibers and the third continuous fibers after being bundled, wound and woven; A curing device (6) is used to heat and cure the first continuous fibers, the second continuous fibers and the third continuous fibers after the secondary dipping treatment; A traction device (7) for traction of the first continuous fiber to sequentially pass through a common dipping device (1), a yarn separation plate (2), a winding device (3), a braiding device (4), an annular pressure dipping device (5) and a curing device (6); The diameter of the yarn outlet (504) is 1.01 times the outer diameter of the thin-walled tube; and the dipping pressure of the annular pressure dipping device is 2-10 MPa.

6. The pultrusion-winding-braiding combined carbon fiber thin-wall tube production system according to claim 5 is characterized in that: The yarn delivery speed w of the winding device (3) satisfies the following formula: w=2πrv / a, wherein w is the yarn delivery speed of the winding device (3), in m / s; r is the winding radius of the second continuous fiber, in m; v is the speed at which the traction device (7) tractions the first continuous fiber, in m / s; a is the yarn sheet width, in m; the winding angle of the winding device (3) satisfies the following formula: α=arctan(2πr / a), wherein α is the winding angle of the winding device (3), that is, the angle between the yarn and the horizontal plane, in degrees; r is the winding radius of the second continuous fiber, in m; and a is the yarn sheet width, in m.

7. The pultrusion-winding-braiding combined carbon fiber thin-wall tube production system according to claim 6 is characterized in that: The glue liquid in the common glue dipping device (1) and the annular pressure glue dipping device is made of resin glue liquid.

8. A method for producing a carbon fiber thin-wall tube by pultrusion-winding-braiding, characterized in that: The steps include: 1) preparing a carbon fiber thin-wall tube production system combined with pultrusion-winding-braiding as described in any one of claims 5 to 7; 2) after passing the first continuous fiber through the common dipping device (1), using the yarn separation plate (2) to gather the first continuous fiber after the initial dipping treatment into the shape of a thin-walled tube, thereby obtaining a first fiber layer; 3) connecting the end of the first continuous fiber to a traction device (7), and using the traction device (7) to pull the first continuous fiber through a common dipping device (1), a yarn separation plate (2), a winding device (3), a braiding device (4), an annular pressure dipping device (5) and a curing device (6) in sequence; 4) using the winding device (3) to wind the second continuous fiber around the outside of the first fiber layer after the bundle is formed, to obtain a second fiber layer; 5) using a weaving device (4) to weave the third continuous fiber into a tube and wrap it around the outer side of the wound second fiber layer; 6) using an annular pressure dipping device (5) to perform a secondary dipping treatment on the first continuous fibers, the second continuous fibers and the third continuous fibers that have been bundled, wound and woven; 7) using a curing device (6) to heat and cure the first continuous fibers, the second continuous fibers, and the third continuous fibers after the secondary dipping treatment; The dipping pressure of the annular pressure dipping device (5) is 2-10 MPa.

9. The method for producing a carbon fiber thin-wall tube by pultrusion-winding-braiding combination according to claim 8, characterized in that: The materials of the first continuous fibers, the second continuous fibers, and the third continuous fibers are all carbon fibers, and the materials of the glue liquid in the common glue dipping device (1) and the annular pressure glue dipping device are both resin glue liquid.

10. The method for producing a carbon fiber thin-wall tube by pultrusion-winding-braiding combination according to claim 9, characterized in that: The thickness of the first fiber layer is 0.2 mm, the thickness of the second fiber layer is 0.4 mm, and the thickness of the third fiber layer is 1.4 mm; the outer diameter of the thin-walled tube is 50 mm, and the thickness is 2 mm.

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