CN110986673A - Light thermal insulation device of composite material cylinder and manufacturing method thereof - Google Patents
Light thermal insulation device of composite material cylinder and manufacturing method thereof Download PDFInfo
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- CN110986673A CN110986673A CN201911239105.1A CN201911239105A CN110986673A CN 110986673 A CN110986673 A CN 110986673A CN 201911239105 A CN201911239105 A CN 201911239105A CN 110986673 A CN110986673 A CN 110986673A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
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Abstract
The invention discloses a light heat preservation device of a composite material barrel and a manufacturing method thereof, and belongs to the technical field of launch barrels. The light heat-insulating device of the composite material cylinder comprises an inner cylinder, a carbon fiber ventilating duct and a heat-insulating structure layer; the carbon fiber ventilating duct is wound on the peripheral surface of the inner barrel; an airflow channel which is convenient for airflow to pass through is formed between the inner peripheral surface of the carbon fiber ventilating duct and the outer peripheral surface of the inner cylinder; the heat preservation structural layer is coated on the outer peripheral surface of the carbon fiber ventilating duct. The problem that the traditional air duct is large in size and cannot be integrated with a structural layer is solved; the air pipe of the hanging load is directly ventilated, and the structural continuity of the carbon fiber composite material cylinder is damaged by adopting a large-diameter air inlet, so that the rigidity of the cylinder is influenced. The carbon fiber ventilating duct is wound on the outer peripheral surface of the inner barrel, so that the ventilating duct and the structural layer are integrated; an airflow channel is formed between the inner peripheral surface of the carbon fiber ventilating duct and the outer peripheral surface of the inner cylinder, and the bearing capacity of the inner cylinder is not damaged; the heat transfer efficiency is ensured by the coated heat insulation structure layer.
Description
Technical Field
The invention relates to the technical field of launch barrels, in particular to a light heat-insulating device for a composite material barrel and a manufacturing method thereof.
Background
The barrel structure is a core component of a ground weapon system, and early ground weapon systems are mostly metal structures, so that the weight of the ground weapon system is heavy and the maneuverability of the ground weapon system is poor. In order to improve the maneuverability of a weapon system, the constant temperature condition of the internal structure of the barrel and the trend of making a ground weapon barrel into a composite material gradually appear, particularly in recent years, the integration of functional and structural composite materials is emphasized, so that the existing composite material barrels are mostly all solid composite material barrels and are mostly formed by adopting a wet winding process. However, they are still heavy and have limited functionality.
In order to solve the above problems, the material of the cylinder is mainly carbon fiber composite material and glass fiber composite material. When the heat exchanger is used, the mode that the ventilation pipe or the whole air duct is arranged at the outer end is mainly adopted in the aspect of controlling the temperature inside the cylinder, two windows are processed in the cylinder, one window is used for air inlet, the other window is used for air outlet, and larger machine equipment is arranged outside the cylinder for air supply so as to realize heat exchange in the cylinder. However, when the air conditioner is used, the air pressure of the air inlet needs to be larger than that of the air outlet, and the air pressure of air supplied by machine equipment is larger; the length of the inner cylinder is longer, so that the temperature difference between the temperature at the air inlet of the inner cylinder and the temperature at the air outlet of the inner cylinder is large, and the temperature is slowly transferred; the inner cylinders of the composite material cylinders are all structural strength layers, and the structural strength of the cylinders is damaged in a mode of arranging two ventilation windows on the cylinders; the ventilation window often still need arrange devices such as blast gate, leads to the structure of barrel complicated, and the weight of barrel is heavy.
Therefore, the composite material barrel structure is provided to reduce the weight of the barrel, and although the weight of the barrel is greatly reduced, the composite material barrel still occupies a large weight due to a large number of ribs, so that the whole barrel still has a heavy weight.
For the weight that alleviates the barrel, set up a plurality of ventilation apertures on the inner tube, twine the PVC pipeline on the inner tube, ventilation aperture and PVC pipeline intercommunication are connected with on-vehicle tuber pipe outside the barrel to make the air current in the barrel can get into the PVC pipeline circulation along a plurality of ventilation apertures. The PVC pipeline direct ventilation mode is adopted, although the heat transfer effect is good, the inner cylinder is provided with small ventilation holes, so that the structural layer of the inner cylinder is damaged, and the bearing capacity of the structural layer is greatly reduced; if the number of the small ventilation holes is small and the diameter is small, the ventilation effect cannot be achieved; if the number of the small ventilation holes is large and the diameter is large, the structural layer of the inner cylinder is seriously damaged; the mode that the cylinder is directly heated by the small holes is adopted, so that the surface heating area of the cylinder is easy to be uneven. By adopting the mode, the problems of complex manufacturing process and high manufacturing cost of the cylinder body are caused.
Disclosure of Invention
The invention aims to provide a light heat preservation device for a composite material cylinder, which aims to solve the problems that the traditional air duct has large volume, is mounted on the side wall of the cylinder and cannot be integrated with a structural layer in the prior art; the air pipe of carry needs to adopt the mode of direct ventilation, needs a major diameter air intake, destroys the structural continuity of carbon-fibre composite barrel, still causes the fibre disconnection, influences the technical problem of barrel rigidity.
The invention also provides a manufacturing method of the light heat-insulating device of the composite material cylinder, which aims to solve the technical problems of complex manufacturing process and high manufacturing cost of the cylinder in the prior art.
The invention provides a light heat-insulating device of a composite material cylinder, which comprises an inner cylinder, a carbon fiber ventilating duct and a heat-insulating structure layer;
the carbon fiber ventilating duct is wound on the peripheral surface of the inner barrel;
an airflow channel which is convenient for airflow to pass through is formed between the inner peripheral surface of the carbon fiber ventilating duct and the outer peripheral surface of the inner cylinder;
the heat preservation structural layer is coated on the outer peripheral surface of the carbon fiber ventilating duct.
Further, the carbon fiber ventilating duct comprises circumferential ribs,
the number of the circumferential ribs is multiple, and the plurality of circumferential ribs are wound on the outer peripheral surface of the inner cylinder in parallel; an airflow channel which is convenient for airflow to pass through is formed between the inner circumferential surface of each annular rib and the outer circumferential surface of the inner cylinder.
Furthermore, the carbon fiber ventilating duct also comprises a first longitudinal gas circulation pipeline, a second longitudinal gas circulation pipeline and a fan, wherein the first longitudinal gas circulation pipeline is connected with the fan, and the fan is connected to the heat-insulating structure layer; the first longitudinal gas circulation pipeline is connected to the outer peripheral surface of the inner cylinder, a gas inlet airflow channel is formed between the first longitudinal gas circulation pipeline and the outer peripheral surface of the inner cylinder, the second longitudinal gas circulation pipeline is connected to the outer peripheral surface of the inner cylinder, and a gas outlet airflow channel is formed between the second longitudinal gas circulation pipeline and the outer peripheral surface of the inner cylinder; a partition is arranged between the first longitudinal gas circulation pipeline and the second longitudinal gas circulation pipeline;
the air inlet end of each circumferential rib is connected with the first longitudinal air circulation pipeline, the air outlet end of each circumferential rib is connected with the second longitudinal air circulation pipeline, the air inlet end of the air flow channel is communicated with the air inlet air flow channel, and the air outlet end of the air flow channel is communicated with the air outlet air flow channel.
Furthermore, the carbon fiber ventilating duct also comprises a third longitudinal gas circulating duct and a fan;
the third longitudinal gas circulation pipeline is connected with the fan, the fan is connected to the heat insulation structure layer, and the third longitudinal gas circulation pipeline is connected to the outer peripheral surface of the inner cylinder; an airflow circulating channel is formed between the third longitudinal gas circulation pipeline and the outer peripheral surface of the inner cylinder;
the air inlet end of each annular rib is connected with the air inlet end of one side of the third longitudinal air circulation pipeline, and the air outlet end of each annular rib is connected with the air outlet end of the other side of the third longitudinal air circulation pipeline, so that the air flow channel is communicated with the air flow circulation channel.
Furthermore, the number of the third longitudinal gas circulation pipelines is multiple, the multiple third longitudinal gas circulation pipelines are arranged in parallel, and each third longitudinal gas circulation pipeline is connected with the fan;
each annular rib is divided into a plurality of sections of arc ribs, the air inlet end of each section of arc rib is connected with the air inlet end of one third longitudinal gas circulation pipeline, and the air outlet end of each section of arc rib is connected with the air outlet end of the adjacent third longitudinal gas circulation pipeline.
Furthermore, the first longitudinal gas circulation pipeline, the second longitudinal gas circulation pipeline and the third longitudinal gas circulation pipeline can penetrate through the inner cylinder in the axial direction of the raised annular rib.
Further, the carbon fiber ventilating duct also comprises a main air duct;
the main air pipeline is connected with the fan, an air inlet pipe of the main air pipeline is connected with the first longitudinal gas circulation pipeline, and an air outlet pipe of the main air pipeline is connected with the second longitudinal gas circulation pipeline.
Furthermore, the cross-sectional shapes of the circumferential ribs, the first longitudinal gas flow pipe, the second longitudinal gas flow pipe and the third longitudinal gas flow pipe are all in a zigzag shape corresponding to the outer peripheral surface of the inner cylinder.
Furthermore, the circumferential ribs comprise first hollow ribs and second hollow ribs;
the inner side end of the first hollow rib is connected with the inner side end of the second hollow rib, the outer side end of the first hollow rib is connected with the first longitudinal gas circulation pipeline, and the outer side end of the second hollow rib is connected with the second longitudinal gas circulation pipeline.
The invention provides a manufacturing method of a light heat preservation device of a composite material cylinder, which comprises the following steps:
(a) inner barrel forming
Adopting carbon fiber as a structural layer, utilizing a dry prepreg winding hot-pressing curing molding method or a wet winding molding method, enabling the layering directions to be 0 degrees, 90 degrees, 45 degrees and the like to be staggered, molding the inner cylinder, enabling the thickness value range of the inner cylinder to be between 5mm and 20mm, and then processing the molded inner cylinder;
(b) molding the carbon fiber ventilating duct;
forming a plurality of pairs of first hollow ribs and second hollow ribs in a manual die laying mode, carrying out hot-pressing curing, wherein the numerical value range of the wall thickness of the sections of the first hollow ribs and the second hollow ribs is between 0.5mm and 0.7mm, adopting 3-4 layers of dry prepreg, and processing the inner peripheral surfaces of the first hollow ribs and the second hollow ribs after the first hollow ribs and the second hollow ribs are molded;
(c) assembly carbon fiber air pipe
The inner wall of each first hollow rib, the inner wall of each second hollow rib and the outer peripheral surface of the inner cylinder are bonded through epoxy structure adhesives, the inner side end of each first hollow rib and the inner side end of each second hollow rib are bonded through the epoxy structure adhesives to form annular ribs, the epoxy structure adhesives meet the requirement that the shearing strength of the whole cylinder is more than or equal to 15MPa at the ambient temperature of minus 20 ℃ to plus 45 ℃, and meanwhile, air leakage cannot occur under the atmospheric pressure of 0.2 MPa;
the first longitudinal gas circulation pipeline and the second longitudinal gas circulation pipeline are connected to the outer peripheral surface of the inner cylinder, the gas inlet end of each circumferential rib is connected with the first longitudinal gas circulation pipeline, and the gas outlet end of each circumferential rib is connected with the second longitudinal gas circulation pipeline;
(d) assembly heat preservation structure layer
The circumferential ribs are clamped and fixed with the joint positions of the first longitudinal gas circulation pipeline and the second longitudinal gas circulation pipeline; bonding polyurethane foam or foaming or spraying other heat insulation materials at the positions of the non-external interfaces of the circumferential ribs, the first longitudinal gas circulation pipeline and the second longitudinal gas circulation pipeline; winding polyurethane foam outside the circumferential ribs by a carbon fiber or glass fiber reinforced plastic fiber winding process to enable the circumferential ribs to become interlayer ribs; the fan is connected on the heat preservation structural layer.
Compared with the prior art, the light heat-insulating device of the composite material cylinder body has the following advantages:
the carbon fiber ventilating duct is directly wound on the peripheral surface of the inner barrel, so that the carbon fiber ventilating duct and the inner barrel are combined into an integral structure, the carbon fiber ventilating duct is light in weight, and the weight of the whole barrel is greatly reduced; an airflow channel convenient for airflow to pass is formed between the inner circumferential surface of the carbon fiber ventilation pipeline and the outer circumferential surface of the inner cylinder, the carbon fiber ventilation pipeline adopts a hollow structure, the weight of the whole cylinder is greatly reduced, airflow directly acts on the outer circumferential surface of the inner cylinder, the outer circumferential surface of the inner cylinder is ensured to be uniformly heated, and the heat transfer speed is high; an airflow channel is directly formed between the inner peripheral surface of the carbon fiber ventilating duct and the outer peripheral surface of the inner barrel, so that the inner barrel is insulated, the structure of the inner barrel is not damaged, the bearing capacity of the inner barrel is ensured, and the heat insulation effect is good; the outer peripheral surface of the carbon fiber ventilating duct is coated with a heat insulation structure layer, and the heat insulation structure layer is utilized to ensure that the heat insulation performance of the outer peripheral surface of the whole barrel is good.
Compared with the prior art, the manufacturing method of the light heat preservation device of the composite material cylinder body has the following advantages:
the invention adopts the steps of inner cylinder forming, carbon fiber ventilating duct assembling, heat preservation structure layer assembling and the like in sequence, the forming process of the whole cylinder is simpler, the manufacturing cost is low, and the production efficiency of the product is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a lightweight thermal insulation device for a composite material cylinder provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a structure with a thermal insulation structure layer removed according to an embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a left side view of FIG. 2;
fig. 5 is a schematic structural diagram of a first carbon fiber ventilation duct provided in an embodiment of the present invention;
fig. 6 is a schematic internal structural view of a first carbon fiber ventilation duct according to an embodiment of the present invention;
fig. 7 is a top view of a first carbon fiber ventilation duct provided in an embodiment of the present invention;
fig. 8 is a left side view of a first carbon fiber ventilation duct according to an embodiment of the present invention;
fig. 9 is a partially broken away schematic view of a first carbon fiber ventilation duct provided in an embodiment of the present invention;
fig. 10 is a schematic structural view of a main air duct installed in a carbon fiber ventilation duct according to an embodiment of the present invention;
FIG. 11 is a cut-away schematic view of a main duct provided by an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a circumferential rib provided in an embodiment of the present invention;
fig. 13 is a schematic structural view of a first hollow rib provided in an embodiment of the present invention;
fig. 14 is a schematic structural view of a second hollow rib provided in the embodiment of the present invention;
FIG. 15 is a schematic view of a first longitudinal gas flow conduit according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a second carbon fiber ventilation duct provided in the embodiment of the present invention;
FIG. 17 is a schematic structural view of an inner barrel according to an embodiment of the present invention;
fig. 18 is a flowchart of a manufacturing method of the lightweight thermal insulation device for a composite material cylinder according to an embodiment of the present invention.
Description of reference numerals:
100-inner cylinder; 200-carbon fiber ventilation ducts;
300-a heat-insulating structural layer;
101-convex ring ribs; 201-gas flow channel;
202-circumferential ribs; 203-a first longitudinal gas flow conduit;
204-a second longitudinal gas flow conduit; 205-an intake airflow path;
206-an outlet gas flow channel; 207-a third longitudinal gas flow conduit;
208-an airflow circulation channel; 209-main air duct;
210-an intake pipe; 211-outlet duct;
212-first hollow ribs; 213-second hollow ribs.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 17, the light thermal insulation device for a composite material cylinder provided by the invention comprises an inner cylinder 100, a carbon fiber ventilation duct 200 and a thermal insulation structure layer 300;
the carbon fiber ventilation duct 200 is wound around the outer circumferential surface of the inner tube 100;
an airflow channel 201 which is convenient for airflow to pass through is formed between the inner circumferential surface of the carbon fiber ventilation pipeline 200 and the outer circumferential surface of the inner cylinder 100; the other parts of the carbon fiber ventilation duct 200 are sealed structures, and are bonded to the inner cylinder 100 to maintain a sealed structure under a certain air pressure.
The thermal insulation structure layer 300 is coated on the outer circumferential surface of the carbon fiber ventilation duct 200. The heat-insulating structure layer is made of polyurethane foam and is used for preventing heat loss.
In one embodiment of the present invention, as shown in fig. 1 to 4, the inner cylinder 100 is disposed at the innermost position as a bearing layer of the whole cylinder; the carbon fiber ventilating duct 200 is directly adhered to the outer peripheral surface of the inner barrel 100 by adopting an epoxy structural adhesive, so that the connection tightness and the adhesion strength are ensured, the structure of the inner barrel 100 is not damaged, and the bearing capacity of the inner barrel 100 is ensured; carbon fiber ventilation pipe 200 winds the outer peripheral face that connects at inner tube 100, and the light in weight of barrel, ventilation pipe and structural layer become integrative structure, and carbon fiber ventilation pipe's wall thickness only 0.4mm ~ 1mm, and weight is far less than the weight of the outside carry tuber pipe among the prior art. The carbon fiber ventilation duct 200 is a ventilation pipeline with a hollow structure, so that an airflow channel 201 convenient for airflow to pass through is formed between the inner circumferential surface of the carbon fiber ventilation duct 200 and the outer circumferential surface of the inner cylinder 100, and the bearing capacity of the inner cylinder 100 is not damaged; the hollow structure is adopted to further reduce the weight of the whole cylinder body, so that the airflow entering the airflow channel 201 directly acts on the peripheral surface of the inner cylinder 100, the heat is transferred to the inside of the inner cylinder 100 in an indirect heat transfer mode, the heat is uniformly distributed in the inner cylinder 100, and the temperature difference is small. The invention adopts a mode of heat transmission with the cylinder body on the basis of not opening holes, not opening windows and not damaging the inner cylinder structure layer, thereby avoiding the defect that the structural strength of the cylinder body is damaged by directly opening the windows or punching the inner cylinder structure layer of the cylinder body in the prior art. According to the invention, the outer peripheral surface of the carbon fiber ventilation duct 200 is coated with the heat insulation structure layer 300, the heat insulation structure layer 300 is made of polyurethane heat insulation foam, the number and the diameter of the ventilation duct are calculated through simulation, the heat transfer efficiency is ensured, and the temperature in the cylinder is ensured.
The thickness value range of the carbon fiber ventilation duct 200 is between 0.5mm and 1.0mm, and in this embodiment, the thickness value of the carbon fiber ventilation duct 200 is 0.5 mm.
The thickness value of the heat insulation foam of the heat insulation structure layer 300 is 10mm, so that heat dissipation is effectively prevented.
Further, the carbon fiber ventilation duct 200 includes circumferential ribs 202,
the number of the circumferential ribs 202 is multiple, and the plurality of circumferential ribs 202 are wound around the outer peripheral surface of the inner cylinder 100 in parallel; an air flow channel 201 for facilitating air flow is formed between the inner circumferential surface of each circumferential rib 202 and the outer circumferential surface of the inner cylinder 100.
In an embodiment of the present invention, each circumferential rib 202 is bonded to the outer circumferential surface of the inner cylinder 100 by using a structural adhesive, so that an air flow channel 201 is formed between the inner circumferential surface of each circumferential rib 202 and the outer circumferential surface of the inner cylinder 100, and uniform heat distribution on the outer circumferential surface of the inner cylinder 100 is ensured.
Further, the carbon fiber ventilation duct 200 further comprises a first longitudinal gas circulation duct 203, a second longitudinal gas circulation duct 204 and a fan, wherein the first longitudinal gas circulation duct 203 is connected with the fan, and the fan is connected to the heat-insulating structural layer 300; a first longitudinal gas circulation pipeline 203 is connected to the outer peripheral surface of the inner cylinder 100, an air inlet flow channel 205 is formed between the first longitudinal gas circulation pipeline 203 and the outer peripheral surface of the inner cylinder 100, a second longitudinal gas circulation pipeline 204 is connected to the outer peripheral surface of the inner cylinder 100, and an air outlet flow channel 206 is formed between the second longitudinal gas circulation pipeline 204 and the outer peripheral surface of the inner cylinder 100; a partition is arranged between the first longitudinal gas circulation pipeline 203 and the second longitudinal gas circulation pipeline 204, so that intake airflow enters along the first longitudinal gas circulation pipeline 203, directly transfers heat to the peripheral surface of the inner barrel 100 through the carbon fiber ventilation pipeline 200, and then flows out along the second longitudinal gas circulation pipeline 204, so as to finish the process of directly transferring heat to the peripheral surface of the inner barrel 100;
the air inlet end of each circumferential rib 202 is connected with a first longitudinal air circulation pipeline 203, the air outlet end of each circumferential rib 202 is connected with a second longitudinal air circulation pipeline 204, so that the air inlet end of the air flow channel 201 is communicated with an air inlet air flow channel 205, and the air outlet end of the air flow channel 201 is communicated with an air outlet air flow channel 206.
In an embodiment of the present invention, as shown in fig. 5 to 9, in fig. 5, the left end of the first longitudinal gas circulation pipe 203 is an air inlet, the left end of the second longitudinal gas circulation pipe 204 is an air outlet, and both the first longitudinal gas circulation pipe 203 and the second longitudinal gas circulation pipe 204 are bonded to the outer peripheral surface of the inner cylinder 100 by using structural adhesive; the number of the circumferential ribs 202 is fourteen, and the fourteen circumferential ribs 202 are wound on the outer peripheral surface of the inner cylinder 100 in parallel; fourteen air inlets are arranged on the outer side of the first longitudinal gas circulation pipeline 203, the air inlet end of each circumferential rib 202 is sequentially connected with fourteen air inlets, fourteen air outlets are arranged on the outer side of the second longitudinal gas circulation pipeline 204, and the air outlet end of each circumferential rib 202 is sequentially connected with fourteen air outlets; the airflow channel 201 of each circumferential rib 202 is communicated with an air inlet airflow channel 205 and an air outlet airflow channel 206; the fan is a light vehicle-mounted fan, and when the fan is started, air flow can smoothly run among the air flow channels 201, the air inlet air flow channel 205 and the air outlet air flow channel 206, so that the outer peripheral surface of the inner barrel 100 is uniformly heated.
According to the invention, a plurality of circumferential ribs 202 are adopted to cover the outer circumferential surface of the inner cylinder 100, the circumferential ribs 202 are mutually independent, and the first longitudinal gas circulation pipeline 203 and the second longitudinal gas circulation pipeline 204 are respectively communicated with the plurality of circumferential ribs 202, so that smooth operation of gas flow in the gas flow channel 201 is ensured, and uniform distribution of gas flow temperature on the outer circumferential surface of the inner cylinder 100 is ensured.
During practical use, the sectional size of the circumferential ribs 202, the number of the circumferential ribs 202 and the specific placement positions of the circumferential ribs 202 can be calculated according to heat conduction simulation to obtain specific numerical values, and then the numerical values are arranged.
The fan adopts an external circulating system or other vehicle-mounted systems, and compared with the prior art that large air supply machine equipment is adopted, the fan is lighter and lighter.
Further, the carbon fiber ventilation duct 200 further comprises a third longitudinal gas circulation duct 207 and a fan;
the third longitudinal gas circulation pipeline 207 is connected with a fan, the fan is connected on the heat insulation structure layer 300, and the third longitudinal gas circulation pipeline 207 is connected on the outer peripheral surface of the inner barrel 100; an airflow circulation channel 208 is formed between the third longitudinal gas circulation pipeline 207 and the outer peripheral surface of the inner cylinder 100;
the air inlet end of each circumferential rib 202 is connected with the air inlet end of one side of the third longitudinal air circulation pipeline 207, and the air outlet end of each circumferential rib 202 is connected with the air outlet end of the other side of the third longitudinal air circulation pipeline 207, so that the air flow channel 201 is communicated with the air flow circulation channel 208.
In an embodiment of the present invention, as shown in fig. 16, the left end of the third longitudinal gas circulation pipeline 207 is an air inlet, the right end is an air outlet, and the third longitudinal gas circulation pipeline 207 is bonded to the outer peripheral surface of the inner cylinder 100 by using structural adhesive; the number of the circumferential ribs 202 is fourteen, and the fourteen circumferential ribs 202 are wound on the outer peripheral surface of the inner cylinder 100 in parallel; fourteen air inlets are arranged on the left side of the third longitudinal gas circulation pipeline 207, the air inlet end of each circumferential rib 202 is sequentially connected with fourteen air inlets, fourteen air outlets are arranged on the right side of the third longitudinal gas circulation pipeline 207, and the air outlet end of each circumferential rib 202 is sequentially connected with fourteen air outlets; the airflow channel 201 of each circumferential rib 202 is communicated with the airflow circulation channel 208, the fan is a light vehicle-mounted fan, and when the fan is started, airflow can smoothly run between the airflow channels 201 and the airflow circulation channels 208, so that the outer peripheral surface of the inner barrel 100 is uniformly heated.
Compared with the prior art, the inlet air pressure needs to be larger than the outlet air pressure, so that the continuous circulation of the internal heat of the inner cylinder 100 can be ensured, and a plurality of air valves need to be installed when a fan is started, so that the problem of large weight of the cylinder body is caused; the air pressure of the air inlet is not required to be larger than that of the air outlet, the vehicle-mounted fan is adopted for air supply, the starting can be realized under a smaller air pressure, an air valve is not required to be installed, and the weight of the cylinder body is reduced.
Furthermore, the number of the third longitudinal gas circulation pipes 207 is multiple, a plurality of the third longitudinal gas circulation pipes 207 are arranged in parallel, and each third longitudinal gas circulation pipe 207 is connected with a fan;
each circumferential rib 202 is divided into a plurality of arc-shaped ribs, the air inlet end of each arc-shaped rib is connected with the air inlet end of one third longitudinal gas circulation pipeline 207, and the air outlet end of each arc-shaped rib is connected with the air outlet end of the adjacent third longitudinal gas circulation pipeline 207.
In one embodiment of the present invention, there are three third longitudinal gas circulation pipes 207, and the three third longitudinal gas circulation pipes 207 are uniformly distributed along the outer circumferential surface of the inner cylinder 100; the air inlet end of each third longitudinal gas circulation pipe 207 is connected with a fan, so that the fan can simultaneously supply air to the three third longitudinal gas circulation pipes 207; fourteen circumferential ribs 202 are adopted, the circumferential ribs 202 adopt three-section broken arc-shaped rib structures, the air inlet end of each arc-shaped rib is connected to the air inlet end on the left side of each third longitudinal gas circulation pipeline 207, and the air outlet end of each arc-shaped rib and the air outlet end on the right side of the adjacent third longitudinal gas circulation pipeline 207 are connected. The invention adopts a mode of three third longitudinal gas circulation pipelines 207, so that the circulation of the gas flow in the gas flow channel 201 inside the fourteen circumferential ribs 202 is smoother.
Further, the first longitudinal gas circulation pipe 203, the second longitudinal gas circulation pipe 204 and the third longitudinal gas circulation pipe 207 can pass through along the axial direction of the raised annular rib 101 of the inner barrel 100.
In an embodiment of the present invention, the fourteen circumferential ribs 202 are a set of carbon fiber ventilation ducts 200, and since a plurality of protruding circumferential ribs 101 may appear on the outer circumferential surface of the inner cylinder 100, a set of carbon fiber ventilation ducts 100 is connected between adjacent protruding circumferential ribs 101, for this reason, a plurality of sets of carbon fiber ventilation ducts 200 need to be installed, when in use, the first longitudinal air circulation duct 203 on each set of carbon fiber ventilation ducts 200 is connected with an air inlet of a fan, and the air after heat transfer flows out along the second longitudinal air circulation duct 204, so as to realize independent control of air inlet in each set of carbon fiber ventilation ducts 200, and this installation method needs to install a plurality of fans.
In another embodiment of the present invention, as shown in fig. 3, fourteen circumferential ribs 202 are a set of carbon fiber ventilation ducts 200, since a plurality of raised annular ribs 101 are present on the outer circumferential surface of the inner cylinder 100, and a set of carbon fiber ventilation ducts 100 are connected between adjacent raised annular ribs 101, for this reason, a plurality of sets of carbon fiber ventilation ducts 200 need to be installed, when in use, only one set of first longitudinal gas flow duct 203 and second longitudinal gas flow duct 204 are provided, and the first longitudinal gas flow duct 203 and second longitudinal gas flow duct 204 are longitudinally provided along the outer circumferential surface of the inner cylinder 100, when encountering the raised annular ribs 101, two connecting through holes are provided in the axial direction of the raised annular ribs 101, so that the first longitudinal gas flow duct 203 and second longitudinal gas flow duct 204 can respectively pass through the two connecting through holes, and at this time, a plurality of sets of carbon fiber ventilation ducts 200 can share a set of first longitudinal gas flow, The second longitudinal gas flow channel 204 performs gas inlet and outlet operations.
In another embodiment of the present invention, as shown in fig. 16, fourteen circumferential ribs 202 are a set of carbon fiber ventilation ducts 200, since a plurality of protruding circumferential ribs 101 may appear on the outer circumferential surface of the inner cylinder 100, and a set of carbon fiber ventilation ducts 100 is connected between adjacent protruding circumferential ribs 101, for this reason, a plurality of sets of carbon fiber ventilation ducts 200 need to be installed, when in use, only one third longitudinal gas circulation duct 207 is provided, the third longitudinal gas circulation duct 207 is longitudinally arranged along the outer circumferential surface of the inner cylinder 100, when encountering the protruding circumferential ribs 101, a connecting through hole is provided in the axial direction of the protruding circumferential ribs 101, so that the third longitudinal gas circulation duct 207 can pass through the connecting through hole, at this time, the plurality of sets of carbon fiber ventilation ducts 200 can share one third longitudinal gas circulation duct 207 for air inlet and outlet operations.
Further, the carbon fiber ventilation duct 200 further includes a main air duct 209;
the main air pipeline 209 is connected with the fan, the air inlet pipe 210 of the main air pipeline 209 is connected with the first longitudinal air circulation pipeline 203, and the air outlet pipe 211 of the main air pipeline 209 is connected with the second longitudinal air circulation pipeline 204.
In one embodiment of the present invention, as shown in fig. 10 and 11, when the blower is started, the air enters the first longitudinal air circulation duct 203 along the air inlet pipe 210 of the main air duct 209, enters the plurality of circumferential ribs 202 to transfer heat to the outer circumferential surface of the inner cylinder 100, and the heat-transferred air flows out along the air outlet pipe 211 of the second longitudinal air circulation duct 204. The main air pipeline 209 can be directly arranged outside the polyurethane foam, so that a fan can be directly connected with the main air pipeline 209 conveniently, and the structure of the polyurethane foam is not damaged.
In other embodiments of the present invention, when the main air duct 209 is not installed, the air inlet of the blower is directly connected to the first longitudinal air circulation duct 203, and the air outlet is directly connected to the second longitudinal air circulation duct 204, which is required to destroy the structure of the polyurethane foam, and this way, the structure of the polyurethane foam is easily destroyed.
Further, the sectional shape of the circumferential rib 202, the sectional shape of the first longitudinal gas flow passage 203, the sectional shape of the second longitudinal gas flow passage 204, and the sectional shape of the third longitudinal gas flow passage 207 are all in a zigzag shape corresponding to the outer peripheral surface of the inner cylinder 100.
The structure of the Chinese character 'ji' shape is adopted, so that the circumferential ribs 202, the first longitudinal gas circulation pipeline 203, the second longitudinal gas circulation pipeline 204 and the third longitudinal gas circulation pipeline 207 are all hollow structures, and smooth circulation of airflow with certain flow in the hollow structures is ensured.
The inner side of the zigzag structure is bonded with the outer peripheral surface of the inner cylinder 100 through structural adhesive, sealing under the pressure of 0.2MPa can be guaranteed, and the bonding strength is greater than 20 MPa.
Further, the circumferential ribs 202 include a first hollow rib 212 and a second hollow rib 213;
the inside end of the first hollow rib 212 is connected to the inside end of the second hollow rib 213, the outside end of the first hollow rib 212 is connected to the first longitudinal gas flow pipe 203, and the outside end of the second hollow rib 213 is connected to the second longitudinal gas flow pipe 204.
In an embodiment of the present invention, as shown in fig. 10 and 13, a first hollow rib 212 and a second hollow rib 213 are in a set, each set has an air inlet and an air outlet, and each set is independent of each other and avoids the position of the circumferential rib on the outer circumferential surface of the inner cylinder 100, so as to ensure the position-limiting continuity of the circumferential rib on the outer circumferential surface of the inner cylinder 100.
In another specific embodiment of the invention, the inner cylinder structure layer is made of a T300 epoxy resin-based composite material and is formed by hot-pressing curing; the thickness of the inner cylinder structure layer is 12mm, and the thickness of the circumferential ribs 202 is 38 mm; the width of the circumferential ribs 202 is 40mm, and the wall thickness is 0.4 mm; the width of the first longitudinal gas circulation pipeline 203 and the width of the second longitudinal gas circulation pipeline 204 are both 180mm, and the width of the main air pipeline 209 is 400 mm; the wall thicknesses of the first longitudinal gas circulation pipeline 203, the second longitudinal gas circulation pipeline 204 and the main air pipeline 209 are all 0.5 mm; spraying polyurethane foam on the outer surface of the carbon fiber ventilation duct 200, wherein the thickness of the polyurethane foam is 40 mm; all the circumferential ribs 202, the first longitudinal gas flow pipe 203 and the second longitudinal gas flow pipe 204 are protected in the polyurethane foam, and only the joint of the main air pipe 209 is left.
Through test and examination, the embodiment can meet the requirement that the environmental temperature is between 30 degrees and-30 degrees, and ensure that the temperature of the cylinder is in the range of 15 degrees to-5 degrees; the maximum temperature adjusting time is 2.4h, and other structures can be adjusted according to specific heat transfer efficiency, the ambient temperature and the required temperature in the cylinder body. For example: the width of the circumferential ribs 202, the range of the spacing between the plurality of circumferential ribs 202, and the specific structural dimensions of the layout of the circumferential ribs 202 can be varied to achieve a suitable heat transfer efficiency.
The light heat preservation device of the composite material cylinder provided by the invention has the following advantages:
the carbon fiber U-shaped ventilation pipeline is directly hidden in the heat insulation layer of the barrel through the design of the carbon fiber U-shaped ventilation pipeline, the structures such as an air duct and an air pipe of the external barrel for temperature exchange are not needed, the integrated forming of the heat insulation function and the structural function is realized, and the overall structure is more compact.
And secondly, the weight of the air pipe is reduced through the design of the thin-wall carbon fiber zigzag ventilation pipeline, and compared with the air pipe, the air channel and the pipeline in the prior art, the weight of the air pipe is greatly reduced.
And through the design of the thin-wall carbon fiber U-shaped ventilation pipeline, the inner cylinder structure layer does not need to be provided with a window, the bearing capacity of the inner cylinder is enhanced, the temperature of the inner cylinder is adjusted and controlled in an indirect heat transfer mode, the balance of the heated area of the inner cylinder is ensured, and the temperature difference is small.
Fourthly, through the structural design and manufacture of the half interlayer ribs, the weight of the whole cylinder body is reduced; on the basis of the barrel interlayer of the launching barrel, the weight of the ribs is greatly reduced through strength check.
Fifthly, through the structural design of the semi-interlayer ribs, the ribs are changed from a full solid structure to a semi-solid structure, the mounting requirements of metal parts are met, and the purpose of light structure is achieved; in terms of material cost, the cost of the foam is far lower than that of the carbon fiber, so that the manufacturing cost of the product is reduced.
As shown in fig. 16, the method for manufacturing a lightweight thermal insulation device of a composite material cylinder provided by the invention comprises the following steps:
(a) inner barrel forming
The inner cylinder 100 is used as a bearing layer of the whole cylinder body, T300 carbon fiber is used as a structural layer, a dry prepreg winding hot-pressing curing molding method is utilized, in other embodiments, a wet winding molding method can be adopted, and the layering directions are staggered in directions of 0 degrees, 90 degrees, 45 degrees and the like, so that the inner cylinder 100 is molded;
the thickness of the inner cylinder 100 ranges from 5mm to 20mm, in this embodiment, the thickness of the inner cylinder 100 ranges from 6mm, and then the outer surface of the formed inner cylinder 100 is machined to ensure the dimensional accuracy of the outer surface of the inner cylinder 100;
(b) molding the carbon fiber ventilating duct;
forming a plurality of pairs of first hollow ribs 209 and second hollow ribs 210 by using dry prepreg in a manual die laying mode, wherein the cross sections of the first hollow ribs 209 and the second hollow ribs 210 in each pair are in a shape like a Chinese character 'ji', vacuumizing, and performing hot-pressing curing to ensure the compactness of the shape like the Chinese character 'ji' of the thin-wall carbon fiber;
after the first hollow ribs 209 and the second hollow ribs 210 are subjected to hot-pressing curing, an airtight test is required to be carried out, and the pressure is maintained for 10 minutes under the pressure of 0.2MPa without leakage;
the numerical range of the sectional wall thickness of the first hollow rib 209 and the second hollow rib 210 is 0.5mm to 0.7mm, in this embodiment, the sectional wall thickness is 0.6 mm; 3-4 layers of dry prepreg are adopted;
after the first hollow ribs 209 and the second hollow ribs 210 are molded, the inner peripheral surfaces of the first hollow ribs and the second hollow ribs are processed to ensure that the first hollow ribs and the second hollow ribs are attached to the molded surface of the bonding part of the inner cylinder 100; when the dimensional accuracy of the first hollow ribs 209 and the second hollow ribs 210 after molding is better controlled, the maximum gaps between the first hollow ribs 209 and the second hollow ribs 210 and the outer peripheral surface of the inner cylinder 100 are less than or equal to 0.5mm, and mechanical processing is not needed.
In this embodiment, the outer diameter of the inner cylinder 100 is 1514mm, the length of the inner cylinder 100 is 8000mm, the maximum environmental temperature difference is-20 ℃ to 45 ℃, and the internal temperature of the inner cylinder 100 is 10 ℃ to 15 ℃;
(c) assembly carbon fiber air pipe
The inner wall of each first hollow rib 209 and the inner wall of each second hollow rib 210 are bonded with the outer peripheral surface of the inner barrel 100 through epoxy structural adhesives, and the inner side end of each first hollow rib 209 and the inner side end of each second hollow rib 210 are bonded through epoxy structural adhesives to form an annular rib 202; the area of the cavity after the annular ribs 202 are connected is 300mm2；
The epoxy structural adhesive meets the condition that the shearing strength of the whole cylinder is more than or equal to 15Mpa at the ambient temperature of minus 20 ℃ to plus 45 ℃, and simultaneously ensures that the air leakage cannot occur under the atmospheric pressure of 0.2 MPa;
in this embodiment, the epoxy structural adhesive is room temperature curing epoxy adhesive J-22, or medium temperature curing epoxy adhesive J-22, so as to ensure that the bonding strength is above 20MPa and the sealing performance is ensured.
The first longitudinal gas circulation pipeline 203 and the second longitudinal gas circulation pipeline 204 are connected to the outer peripheral surface of the inner cylinder 100, the number of the circumferential ribs 202 is three, the gas inlet end of each circumferential rib 202 is connected with the first longitudinal gas circulation pipeline 203, the gas outlet end of each circumferential rib 202 is connected with the second longitudinal gas circulation pipeline 204, and each circumferential rib 202 is independent from each other and radiates heat to the inside of the inner cylinder 100 in a heat transfer mode;
(d) assembly heat preservation structure layer
The circumferential ribs 202 are clamped and fixed with the interface positions of the first longitudinal gas circulation pipeline 203 and the second longitudinal gas circulation pipeline 204; polyurethane foam or foaming or spraying other heat insulation materials are bonded at the positions of the non-external interfaces of the circumferential ribs 202, the first longitudinal gas circulation pipeline 203 and the second longitudinal gas circulation pipeline 204; winding polyurethane foam outside the circumferential ribs 202 through a carbon fiber or glass fiber reinforced plastic fiber winding process to enable the circumferential ribs 202 to become interlayer ribs; the fan is connected on insulation structure layer 300.
After the connection is finished, polyurethane foaming is carried out, and the whole carbon fiber ventilating duct is buried in the foaming; after foaming is finished, the position of the interlayer rib is machined, the outer surface of the foam is machined, the diameter of the outer circle of the foam is ensured, and the interlayer rib is molded.
The half interlayer rib of the invention is formed by processing the pre-buried foam to the size, adhering the pre-buried foam to the inner cylinder 100 and forming the whole reinforcing rib; this results in the ribs being partially foamed and partially solid. The position where the pre-buried foam is bonded can not be the subsequent part assembly, fastening position. The size and dimension of the pre-buried foam can increase the volume of the foam as much as possible on the basis of meeting the requirements of strength check and rigidity check.
Prefabricating dimensional polyurethane foam and a glass fiber reinforced plastic block by using the interlayer ribs according to the position of an external interface;
the rib winding process adopts a multilayer T300 carbon fiber hot-pressing curing process, the thickness value range is 2-4 mm, and in the embodiment, the thickness value is 3 mm;
the fan is bolted on the heat preservation structure layer 300.
Finally, an outer skin, namely glass fiber reinforced plastic, is wound and molded outside the polyurethane foam for fixing the foam, preventing water and maintaining the shape.
After the outer skin is wound and formed, the mechanical processing is carried out again, and two windows are processed on the main air pipeline 209, wherein one window is used for being connected with an external air supply outlet, and the other window is used for being connected with an air outlet, so that the two windows are opened on the n-shaped carbon fiber ventilation pipe 200. The sizes of the two windows are consistent with that of the external air supply interface, and metal parts with sealing grooves can be designed according to the size of the external air supply interface, are connected with the machining window, and meanwhile, sealing is guaranteed.
According to the invention, the carbon fiber ventilation pipeline 200 and the heat insulation structure layer 300 are connected to the outside of the inner barrel 100, so that an external air duct is not required to be hung outside the barrel, and the weight of the barrel is reduced; the cylinder body is not provided with vent holes, so that the structural strength of the cylinder body is kept; the carbon fiber ventilation pipeline 200 is used for protecting the internal temperature of the cylinder in a heat transfer mode; the carbon fiber ventilation pipeline 200 further reduces the structural weight of the cylinder body, improves the mobility and the transportability of the cylinder body, and meets the stability of the internal temperature of the cylinder body under the alternating environment temperature.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A light heat preservation device of a composite material cylinder is characterized by comprising an inner cylinder (100), a carbon fiber ventilation pipeline (200) and a heat preservation structure layer (300);
the carbon fiber ventilating duct (200) is wound on the outer peripheral surface of the inner cylinder (100);
an airflow channel (201) which is convenient for airflow to pass through is formed between the inner circumferential surface of the carbon fiber ventilating duct (200) and the outer circumferential surface of the inner cylinder (100);
the heat-insulating structure layer (300) is coated on the peripheral surface of the carbon fiber ventilating duct (200).
2. The lightweight thermal insulation device of a composite material cylinder body according to claim 1, characterized in that the carbon fiber ventilation duct (200) comprises circumferential ribs (202),
the number of the circumferential ribs (202) is multiple, and the plurality of circumferential ribs (202) are wound on the outer peripheral surface of the inner cylinder (100) in parallel; an air flow channel (201) convenient for air flow to pass through is formed between the inner circumferential surface of each annular rib (202) and the outer circumferential surface of the inner cylinder (100).
3. The lightweight thermal insulation device for composite material cylinders according to claim 2, characterized in that the carbon fiber ventilation duct (200) further comprises a first longitudinal gas circulation duct (203), a second longitudinal gas circulation duct (204) and a fan, wherein the first longitudinal gas circulation duct (203) is connected with the fan, and the fan is connected with the thermal insulation structure layer (300); the first longitudinal gas circulation pipeline (203) is connected to the outer peripheral surface of the inner cylinder (100), an inlet gas flow channel (205) is formed between the first longitudinal gas circulation pipeline (203) and the outer peripheral surface of the inner cylinder (100), the second longitudinal gas circulation pipeline (204) is connected to the outer peripheral surface of the inner cylinder (100), and an outlet gas flow channel (206) is formed between the second longitudinal gas circulation pipeline (204) and the outer peripheral surface of the inner cylinder (100); -there is a break between the first longitudinal gas flow duct (203) and the second longitudinal gas flow duct (204);
the air inlet end of each circumferential rib (202) is connected with the first longitudinal air circulation pipeline (203), the air outlet end of each circumferential rib (202) is connected with the second longitudinal air circulation pipeline (204), the air inlet end of the air flow channel (201) is communicated with the air inlet air flow channel (205), and the air outlet end of the air flow channel (201) is communicated with the air outlet air flow channel (206).
4. The lightweight insulation of composite cartridges according to claim 2, characterized in that the carbon fiber ventilation duct (200) further comprises a third longitudinal gas circulation duct (207) and a fan;
the third longitudinal gas circulation pipeline (207) is connected with the fan, the fan is connected to the heat-insulating structural layer (300), and the third longitudinal gas circulation pipeline (207) is connected to the outer peripheral surface of the inner barrel (100); an airflow circulating channel (208) is formed between the third longitudinal gas circulation pipeline (207) and the outer peripheral surface of the inner cylinder (100);
the air inlet end of each annular rib (202) is connected with the air inlet end of one side of the third longitudinal air circulation pipeline (207), the air outlet end of each annular rib (202) is connected with the air outlet end of the other side of the third longitudinal air circulation pipeline (207), and the air flow channel (201) is communicated with the air flow circulation channel (208).
5. The lightweight insulation device for composite material cylinders according to claim 4, characterized in that the number of the third longitudinal gas flow conduits (207) is plural, a plurality of the third longitudinal gas flow conduits (207) are arranged in parallel, and each third longitudinal gas flow conduit (207) is connected with the fan;
each annular rib (202) is divided into a plurality of sections of arc ribs, the air inlet end of each section of arc rib is connected with the air inlet end of one third longitudinal gas circulation pipeline (207), and the air outlet end of each section of arc rib is connected with the air outlet end of the adjacent third longitudinal gas circulation pipeline (207).
6. The lightweight insulation of composite cartridges according to claim 3 or 4, characterized in that the first (203), the second (204) and the third (207) longitudinal gas flow ducts are each able to pass along the axial direction of the raised bead (101) of the inner cartridge (100).
7. The lightweight insulation device of composite material cylinder according to claim 3, characterized in that the carbon fiber ventilation duct (200) further comprises a main air duct (209);
the main air pipeline (209) is connected with the fan, an air inlet pipe (210) of the main air pipeline (209) is connected with the first longitudinal gas circulation pipeline (203), and an air outlet pipe (211) of the main air pipeline (209) is connected with the second longitudinal gas circulation pipeline (204).
8. The lightweight thermal insulation device for composite material cylinders according to claim 3 or 4, characterized in that the cross-sectional shape of the circumferential ribs (202), the cross-sectional shape of the first longitudinal gas flow duct (203), the cross-sectional shape of the second longitudinal gas flow duct (204), and the cross-sectional shape of the third longitudinal gas flow duct (207) are each a zigzag shape conforming to the outer circumferential surface of the inner cylinder (100).
9. The lightweight insulation of composite tubular bodies according to claim 3, characterized in that said circumferential ribs (202) comprise first (212) and second (213) hollow ribs;
the inner side end of the first hollow rib (212) is connected with the inner side end of the second hollow rib (213), the outer side end of the first hollow rib (212) is connected with the first longitudinal gas circulation pipeline (203), and the outer side end of the second hollow rib (213) is connected with the second longitudinal gas circulation pipeline (204).
10. A manufacturing method of a light heat preservation device of a composite material cylinder is characterized by comprising the following steps:
(a) inner barrel forming
Adopting carbon fiber as a structural layer, utilizing a dry prepreg winding hot-pressing curing molding method or a wet winding molding method, enabling the laying direction to be 0 degree, 90 degrees, 45 degrees and the like to be staggered, molding the inner cylinder (100), enabling the thickness value range of the inner cylinder (100) to be between 5mm and 20mm, and then processing the molded inner cylinder (100);
(b) molding the carbon fiber ventilating duct;
forming a plurality of pairs of first hollow ribs (209) and second hollow ribs (210) in a manual die laying mode, carrying out hot-pressing solidification, wherein the numerical value range of the cross-sectional wall thickness of the first hollow ribs (209) and the second hollow ribs (210) is between 0.5mm and 0.7mm, adopting 3-4 layers of dry prepreg, and processing the inner peripheral surfaces of the first hollow ribs (209) and the second hollow ribs (210) after molding;
(c) assembly carbon fiber air pipe
The inner wall of each first hollow rib (209), the inner wall of each second hollow rib (210) and the outer peripheral surface of the inner cylinder (100) are bonded through epoxy structure adhesives, the inner side end of each first hollow rib (209) and the inner side end of each second hollow rib (210) are bonded through epoxy structure adhesives to form an annular rib (202), the epoxy structure adhesives meet the requirement that the shearing strength of the whole cylinder body is not less than 15Mpa at the ambient temperature of minus 20 ℃ to plus 45 ℃, and meanwhile, air leakage cannot occur under the atmospheric pressure of 0.2 MPa;
a first longitudinal gas circulation pipeline (203) and a second longitudinal gas circulation pipeline (204) are connected to the outer peripheral surface of the inner barrel 100, the gas inlet end of each circumferential rib (202) is connected with the first longitudinal gas circulation pipeline (203), and the gas outlet end of each circumferential rib (202) is connected with the second longitudinal gas circulation pipeline (204);
(d) assembly heat preservation structure layer
The circumferential ribs (202) are clamped and fixed with the joint positions of the first longitudinal gas circulation pipeline (203) and the second longitudinal gas circulation pipeline (204); polyurethane foam or other foaming or spraying heat-insulating materials are bonded at the positions of the non-external interfaces of the circumferential ribs (202), the first longitudinal gas circulation pipeline (203) and the second longitudinal gas circulation pipeline (204); polyurethane foam is wound outside the circumferential ribs (202) through a carbon fiber or glass fiber reinforced plastic fiber winding process, so that the circumferential ribs (202) become interlayer ribs; the fan is connected on the heat preservation structural layer (300).
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